fs/ksmbd/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14
  15 #include "glob.h"
  16 #include "smb2pdu.h"
  17 #include "smbfsctl.h"
  18 #include "oplock.h"
  19 #include "smbacl.h"
  20
  21 #include "auth.h"
  22 #include "asn1.h"
  23 #include "connection.h"
  24 #include "transport_ipc.h"
  25 #include "transport_rdma.h"
  26 #include "vfs.h"
  27 #include "vfs_cache.h"
  28 #include "misc.h"
  29
  30 #include "server.h"
  31 #include "smb_common.h"
  32 #include "smbstatus.h"
  33 #include "ksmbd_work.h"
  34 #include "mgmt/user_config.h"
  35 #include "mgmt/share_config.h"
  36 #include "mgmt/tree_connect.h"
  37 #include "mgmt/user_session.h"
  38 #include "mgmt/ksmbd_ida.h"
  39 #include "ndr.h"
  40
  41 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  42 {
  43         if (work->next_smb2_rcv_hdr_off) {
  44                 *req = ksmbd_req_buf_next(work);
  45                 *rsp = ksmbd_resp_buf_next(work);
  46         } else {
  47                 *req = work->request_buf;
  48                 *rsp = work->response_buf;
  49         }
  50 }
  51
  52 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  53
  54 /**
  55  * check_session_id() - check for valid session id in smb header
  56  * @conn:       connection instance
  57  * @id:         session id from smb header
  58  *
  59  * Return:      1 if valid session id, otherwise 0
  60  */
  61 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  62 {
  63         struct ksmbd_session *sess;
  64
  65         if (id == 0 || id == -1)
  66                 return false;
  67
  68         sess = ksmbd_session_lookup_all(conn, id);
  69         if (sess)
  70                 return true;
  71         pr_err("Invalid user session id: %llu\n", id);
  72         return false;
  73 }
  74
  75 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  76 {
  77         struct channel *chann;
  78
  79         list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
  80                 if (chann->conn == conn)
  81                         return chann;
  82         }
  83
  84         return NULL;
  85 }
  86
  87 /**
  88  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  89  * @work:       smb work
  90  *
  91  * Return:      0 if there is a tree connection matched or these are
  92  *              skipable commands, otherwise error
  93  */
  94 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  95 {
  96         struct smb2_hdr *req_hdr = work->request_buf;
  97         int tree_id;
  98
  99         work->tcon = NULL;
 100         if (work->conn->ops->get_cmd_val(work) == SMB2_TREE_CONNECT_HE ||
 101             work->conn->ops->get_cmd_val(work) ==  SMB2_CANCEL_HE ||
 102             work->conn->ops->get_cmd_val(work) ==  SMB2_LOGOFF_HE) {
 103                 ksmbd_debug(SMB, "skip to check tree connect request\n");
 104                 return 0;
 105         }
 106
 107         if (xa_empty(&work->sess->tree_conns)) {
 108                 ksmbd_debug(SMB, "NO tree connected\n");
 109                 return -ENOENT;
 110         }
 111
 112         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 113         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 114         if (!work->tcon) {
 115                 pr_err("Invalid tid %d\n", tree_id);
 116                 return -EINVAL;
 117         }
 118
 119         return 1;
 120 }
 121
 122 /**
 123  * smb2_set_err_rsp() - set error response code on smb response
 124  * @work:       smb work containing response buffer
 125  */
 126 void smb2_set_err_rsp(struct ksmbd_work *work)
 127 {
 128         struct smb2_err_rsp *err_rsp;
 129
 130         if (work->next_smb2_rcv_hdr_off)
 131                 err_rsp = ksmbd_resp_buf_next(work);
 132         else
 133                 err_rsp = work->response_buf;
 134
 135         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 136                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 137                 err_rsp->ErrorContextCount = 0;
 138                 err_rsp->Reserved = 0;
 139                 err_rsp->ByteCount = 0;
 140                 err_rsp->ErrorData[0] = 0;
 141                 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
 142         }
 143 }
 144
 145 /**
 146  * is_smb2_neg_cmd() - is it smb2 negotiation command
 147  * @work:       smb work containing smb header
 148  *
 149  * Return:      true if smb2 negotiation command, otherwise false
 150  */
 151 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 152 {
 153         struct smb2_hdr *hdr = work->request_buf;
 154
 155         /* is it SMB2 header ? */
 156         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 157                 return false;
 158
 159         /* make sure it is request not response message */
 160         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 161                 return false;
 162
 163         if (hdr->Command != SMB2_NEGOTIATE)
 164                 return false;
 165
 166         return true;
 167 }
 168
 169 /**
 170  * is_smb2_rsp() - is it smb2 response
 171  * @work:       smb work containing smb response buffer
 172  *
 173  * Return:      true if smb2 response, otherwise false
 174  */
 175 bool is_smb2_rsp(struct ksmbd_work *work)
 176 {
 177         struct smb2_hdr *hdr = work->response_buf;
 178
 179         /* is it SMB2 header ? */
 180         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 181                 return false;
 182
 183         /* make sure it is response not request message */
 184         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 185                 return false;
 186
 187         return true;
 188 }
 189
 190 /**
 191  * get_smb2_cmd_val() - get smb command code from smb header
 192  * @work:       smb work containing smb request buffer
 193  *
 194  * Return:      smb2 request command value
 195  */
 196 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 197 {
 198         struct smb2_hdr *rcv_hdr;
 199
 200         if (work->next_smb2_rcv_hdr_off)
 201                 rcv_hdr = ksmbd_req_buf_next(work);
 202         else
 203                 rcv_hdr = work->request_buf;
 204         return le16_to_cpu(rcv_hdr->Command);
 205 }
 206
 207 /**
 208  * set_smb2_rsp_status() - set error response code on smb2 header
 209  * @work:       smb work containing response buffer
 210  * @err:        error response code
 211  */
 212 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 213 {
 214         struct smb2_hdr *rsp_hdr;
 215
 216         if (work->next_smb2_rcv_hdr_off)
 217                 rsp_hdr = ksmbd_resp_buf_next(work);
 218         else
 219                 rsp_hdr = work->response_buf;
 220         rsp_hdr->Status = err;
 221         smb2_set_err_rsp(work);
 222 }
 223
 224 /**
 225  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 226  * @work:       smb work containing smb request buffer
 227  *
 228  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 229  * dialect auto-negotiation.
 230  */
 231 int init_smb2_neg_rsp(struct ksmbd_work *work)
 232 {
 233         struct smb2_hdr *rsp_hdr;
 234         struct smb2_negotiate_rsp *rsp;
 235         struct ksmbd_conn *conn = work->conn;
 236
 237         if (conn->need_neg == false)
 238                 return -EINVAL;
 239
 240         rsp_hdr = work->response_buf;
 241
 242         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 243
 244         rsp_hdr->smb2_buf_length =
 245                 cpu_to_be32(smb2_hdr_size_no_buflen(conn->vals));
 246
 247         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 248         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 249         rsp_hdr->CreditRequest = cpu_to_le16(2);
 250         rsp_hdr->Command = SMB2_NEGOTIATE;
 251         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 252         rsp_hdr->NextCommand = 0;
 253         rsp_hdr->MessageId = 0;
 254         rsp_hdr->Id.SyncId.ProcessId = 0;
 255         rsp_hdr->Id.SyncId.TreeId = 0;
 256         rsp_hdr->SessionId = 0;
 257         memset(rsp_hdr->Signature, 0, 16);
 258
 259         rsp = work->response_buf;
 260
 261         WARN_ON(ksmbd_conn_good(work));
 262
 263         rsp->StructureSize = cpu_to_le16(65);
 264         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 265         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 266         /* Not setting conn guid rsp->ServerGUID, as it
 267          * not used by client for identifying connection
 268          */
 269         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 270         /* Default Max Message Size till SMB2.0, 64K*/
 271         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 272         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 273         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 274
 275         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 276         rsp->ServerStartTime = 0;
 277
 278         rsp->SecurityBufferOffset = cpu_to_le16(128);
 279         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 280         ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
 281                 sizeof(rsp->hdr.smb2_buf_length)) +
 282                 le16_to_cpu(rsp->SecurityBufferOffset));
 283         inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
 284                 sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
 285                 AUTH_GSS_LENGTH);
 286         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 287         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 288                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 289         conn->use_spnego = true;
 290
 291         ksmbd_conn_set_need_negotiate(work);
 292         return 0;
 293 }
 294
 295 static int smb2_consume_credit_charge(struct ksmbd_work *work,
 296                                       unsigned short credit_charge)
 297 {
 298         struct ksmbd_conn *conn = work->conn;
 299         unsigned int rsp_credits = 1;
 300
 301         if (!conn->total_credits)
 302                 return 0;
 303
 304         if (credit_charge > 0)
 305                 rsp_credits = credit_charge;
 306
 307         conn->total_credits -= rsp_credits;
 308         return rsp_credits;
 309 }
 310
 311 /**
 312  * smb2_set_rsp_credits() - set number of credits in response buffer
 313  * @work:       smb work containing smb response buffer
 314  */
 315 int smb2_set_rsp_credits(struct ksmbd_work *work)
 316 {
 317         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 318         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 319         struct ksmbd_conn *conn = work->conn;
 320         unsigned short credits_requested = le16_to_cpu(req_hdr->CreditRequest);
 321         unsigned short credit_charge = 1, credits_granted = 0;
 322         unsigned short aux_max, aux_credits, min_credits;
 323         int rsp_credit_charge;
 324
 325         if (hdr->Command == SMB2_CANCEL)
 326                 goto out;
 327
 328         /* get default minimum credits by shifting maximum credits by 4 */
 329         min_credits = conn->max_credits >> 4;
 330
 331         if (conn->total_credits >= conn->max_credits) {
 332                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 333                 conn->total_credits = min_credits;
 334         }
 335
 336         rsp_credit_charge =
 337                 smb2_consume_credit_charge(work, le16_to_cpu(req_hdr->CreditCharge));
 338         if (rsp_credit_charge < 0)
 339                 return -EINVAL;
 340
 341         hdr->CreditCharge = cpu_to_le16(rsp_credit_charge);
 342
 343         if (credits_requested > 0) {
 344                 aux_credits = credits_requested - 1;
 345                 aux_max = 32;
 346                 if (hdr->Command == SMB2_NEGOTIATE)
 347                         aux_max = 0;
 348                 aux_credits = (aux_credits < aux_max) ? aux_credits : aux_max;
 349                 credits_granted = aux_credits + credit_charge;
 350
 351                 /* if credits granted per client is getting bigger than default
 352                  * minimum credits then we should wrap it up within the limits.
 353                  */
 354                 if ((conn->total_credits + credits_granted) > min_credits)
 355                         credits_granted = min_credits - conn->total_credits;
 356                 /*
 357                  * TODO: Need to adjuct CreditRequest value according to
 358                  * current cpu load
 359                  */
 360         } else if (conn->total_credits == 0) {
 361                 credits_granted = 1;
 362         }
 363
 364         conn->total_credits += credits_granted;
 365         work->credits_granted += credits_granted;
 366
 367         if (!req_hdr->NextCommand) {
 368                 /* Update CreditRequest in last request */
 369                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 370         }
 371 out:
 372         ksmbd_debug(SMB,
 373                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 374                     credits_requested, credits_granted,
 375                     conn->total_credits);
 376         return 0;
 377 }
 378
 379 /**
 380  * init_chained_smb2_rsp() - initialize smb2 chained response
 381  * @work:       smb work containing smb response buffer
 382  */
 383 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 384 {
 385         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 386         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 387         struct smb2_hdr *rsp_hdr;
 388         struct smb2_hdr *rcv_hdr;
 389         int next_hdr_offset = 0;
 390         int len, new_len;
 391
 392         /* Len of this response = updated RFC len - offset of previous cmd
 393          * in the compound rsp
 394          */
 395
 396         /* Storing the current local FID which may be needed by subsequent
 397          * command in the compound request
 398          */
 399         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 400                 work->compound_fid =
 401                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 402                                 VolatileFileId);
 403                 work->compound_pfid =
 404                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 405                                 PersistentFileId);
 406                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 407         }
 408
 409         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 410         next_hdr_offset = le32_to_cpu(req->NextCommand);
 411
 412         new_len = ALIGN(len, 8);
 413         inc_rfc1001_len(work->response_buf, ((sizeof(struct smb2_hdr) - 4)
 414                         + new_len - len));
 415         rsp->NextCommand = cpu_to_le32(new_len);
 416
 417         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 418         work->next_smb2_rsp_hdr_off += new_len;
 419         ksmbd_debug(SMB,
 420                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 421                     new_len, work->next_smb2_rcv_hdr_off,
 422                     work->next_smb2_rsp_hdr_off);
 423
 424         rsp_hdr = ksmbd_resp_buf_next(work);
 425         rcv_hdr = ksmbd_req_buf_next(work);
 426
 427         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 428                 ksmbd_debug(SMB, "related flag should be set\n");
 429                 work->compound_fid = KSMBD_NO_FID;
 430                 work->compound_pfid = KSMBD_NO_FID;
 431         }
 432         memset((char *)rsp_hdr + 4, 0, sizeof(struct smb2_hdr) + 2);
 433         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 434         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 435         rsp_hdr->Command = rcv_hdr->Command;
 436
 437         /*
 438          * Message is response. We don't grant oplock yet.
 439          */
 440         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 441                                 SMB2_FLAGS_RELATED_OPERATIONS);
 442         rsp_hdr->NextCommand = 0;
 443         rsp_hdr->MessageId = rcv_hdr->MessageId;
 444         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 445         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 446         rsp_hdr->SessionId = rcv_hdr->SessionId;
 447         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 448 }
 449
 450 /**
 451  * is_chained_smb2_message() - check for chained command
 452  * @work:       smb work containing smb request buffer
 453  *
 454  * Return:      true if chained request, otherwise false
 455  */
 456 bool is_chained_smb2_message(struct ksmbd_work *work)
 457 {
 458         struct smb2_hdr *hdr = work->request_buf;
 459         unsigned int len, next_cmd;
 460
 461         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 462                 return false;
 463
 464         hdr = ksmbd_req_buf_next(work);
 465         next_cmd = le32_to_cpu(hdr->NextCommand);
 466         if (next_cmd > 0) {
 467                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 468                         __SMB2_HEADER_STRUCTURE_SIZE >
 469                     get_rfc1002_len(work->request_buf)) {
 470                         pr_err("next command(%u) offset exceeds smb msg size\n",
 471                                next_cmd);
 472                         return false;
 473                 }
 474
 475                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 476                 init_chained_smb2_rsp(work);
 477                 return true;
 478         } else if (work->next_smb2_rcv_hdr_off) {
 479                 /*
 480                  * This is last request in chained command,
 481                  * align response to 8 byte
 482                  */
 483                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 484                 len = len - get_rfc1002_len(work->response_buf);
 485                 if (len) {
 486                         ksmbd_debug(SMB, "padding len %u\n", len);
 487                         inc_rfc1001_len(work->response_buf, len);
 488                         if (work->aux_payload_sz)
 489                                 work->aux_payload_sz += len;
 490                 }
 491         }
 492         return false;
 493 }
 494
 495 /**
 496  * init_smb2_rsp_hdr() - initialize smb2 response
 497  * @work:       smb work containing smb request buffer
 498  *
 499  * Return:      0
 500  */
 501 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 502 {
 503         struct smb2_hdr *rsp_hdr = work->response_buf;
 504         struct smb2_hdr *rcv_hdr = work->request_buf;
 505         struct ksmbd_conn *conn = work->conn;
 506
 507         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 508         rsp_hdr->smb2_buf_length =
 509                 cpu_to_be32(smb2_hdr_size_no_buflen(conn->vals));
 510         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 511         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 512         rsp_hdr->Command = rcv_hdr->Command;
 513
 514         /*
 515          * Message is response. We don't grant oplock yet.
 516          */
 517         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 518         rsp_hdr->NextCommand = 0;
 519         rsp_hdr->MessageId = rcv_hdr->MessageId;
 520         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 521         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 522         rsp_hdr->SessionId = rcv_hdr->SessionId;
 523         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 524
 525         work->syncronous = true;
 526         if (work->async_id) {
 527                 ksmbd_release_id(&conn->async_ida, work->async_id);
 528                 work->async_id = 0;
 529         }
 530
 531         return 0;
 532 }
 533
 534 /**
 535  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 536  * @work:       smb work containing smb request buffer
 537  *
 538  * Return:      0 on success, otherwise -ENOMEM
 539  */
 540 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 541 {
 542         struct smb2_hdr *hdr = work->request_buf;
 543         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 544         size_t large_sz = work->conn->vals->max_trans_size + MAX_SMB2_HDR_SIZE;
 545         size_t sz = small_sz;
 546         int cmd = le16_to_cpu(hdr->Command);
 547
 548         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 549                 sz = large_sz;
 550
 551         if (cmd == SMB2_QUERY_INFO_HE) {
 552                 struct smb2_query_info_req *req;
 553
 554                 req = work->request_buf;
 555                 if (req->InfoType == SMB2_O_INFO_FILE &&
 556                     (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 557                      req->FileInfoClass == FILE_ALL_INFORMATION))
 558                         sz = large_sz;
 559         }
 560
 561         /* allocate large response buf for chained commands */
 562         if (le32_to_cpu(hdr->NextCommand) > 0)
 563                 sz = large_sz;
 564
 565         work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
 566         if (!work->response_buf)
 567                 return -ENOMEM;
 568
 569         work->response_sz = sz;
 570         return 0;
 571 }
 572
 573 /**
 574  * smb2_check_user_session() - check for valid session for a user
 575  * @work:       smb work containing smb request buffer
 576  *
 577  * Return:      0 on success, otherwise error
 578  */
 579 int smb2_check_user_session(struct ksmbd_work *work)
 580 {
 581         struct smb2_hdr *req_hdr = work->request_buf;
 582         struct ksmbd_conn *conn = work->conn;
 583         unsigned int cmd = conn->ops->get_cmd_val(work);
 584         unsigned long long sess_id;
 585
 586         work->sess = NULL;
 587         /*
 588          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 589          * require a session id, so no need to validate user session's for
 590          * these commands.
 591          */
 592         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 593             cmd == SMB2_SESSION_SETUP_HE)
 594                 return 0;
 595
 596         if (!ksmbd_conn_good(work))
 597                 return -EINVAL;
 598
 599         sess_id = le64_to_cpu(req_hdr->SessionId);
 600         /* Check for validity of user session */
 601         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 602         if (work->sess)
 603                 return 1;
 604         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 605         return -EINVAL;
 606 }
 607
 608 static void destroy_previous_session(struct ksmbd_user *user, u64 id)
 609 {
 610         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 611         struct ksmbd_user *prev_user;
 612
 613         if (!prev_sess)
 614                 return;
 615
 616         prev_user = prev_sess->user;
 617
 618         if (!prev_user ||
 619             strcmp(user->name, prev_user->name) ||
 620             user->passkey_sz != prev_user->passkey_sz ||
 621             memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) {
 622                 put_session(prev_sess);
 623                 return;
 624         }
 625
 626         put_session(prev_sess);
 627         ksmbd_session_destroy(prev_sess);
 628 }
 629
 630 /**
 631  * smb2_get_name() - get filename string from on the wire smb format
 632  * @share:      ksmbd_share_config pointer
 633  * @src:        source buffer
 634  * @maxlen:     maxlen of source string
 635  * @nls_table:  nls_table pointer
 636  *
 637  * Return:      matching converted filename on success, otherwise error ptr
 638  */
 639 static char *
 640 smb2_get_name(struct ksmbd_share_config *share, const char *src,
 641               const int maxlen, struct nls_table *local_nls)
 642 {
 643         char *name;
 644
 645         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 646         if (IS_ERR(name)) {
 647                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 648                 return name;
 649         }
 650
 651         ksmbd_conv_path_to_unix(name);
 652         ksmbd_strip_last_slash(name);
 653         return name;
 654 }
 655
 656 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 657 {
 658         struct smb2_hdr *rsp_hdr;
 659         struct ksmbd_conn *conn = work->conn;
 660         int id;
 661
 662         rsp_hdr = work->response_buf;
 663         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 664
 665         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 666         if (id < 0) {
 667                 pr_err("Failed to alloc async message id\n");
 668                 return id;
 669         }
 670         work->syncronous = false;
 671         work->async_id = id;
 672         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 673
 674         ksmbd_debug(SMB,
 675                     "Send interim Response to inform async request id : %d\n",
 676                     work->async_id);
 677
 678         work->cancel_fn = fn;
 679         work->cancel_argv = arg;
 680
 681         if (list_empty(&work->async_request_entry)) {
 682                 spin_lock(&conn->request_lock);
 683                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 684                 spin_unlock(&conn->request_lock);
 685         }
 686
 687         return 0;
 688 }
 689
 690 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 691 {
 692         struct smb2_hdr *rsp_hdr;
 693
 694         rsp_hdr = work->response_buf;
 695         smb2_set_err_rsp(work);
 696         rsp_hdr->Status = status;
 697
 698         work->multiRsp = 1;
 699         ksmbd_conn_write(work);
 700         rsp_hdr->Status = 0;
 701         work->multiRsp = 0;
 702 }
 703
 704 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 705 {
 706         if (S_ISDIR(mode) || S_ISREG(mode))
 707                 return 0;
 708
 709         if (S_ISLNK(mode))
 710                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 711         else if (S_ISFIFO(mode))
 712                 return IO_REPARSE_TAG_LX_FIFO_LE;
 713         else if (S_ISSOCK(mode))
 714                 return IO_REPARSE_TAG_AF_UNIX_LE;
 715         else if (S_ISCHR(mode))
 716                 return IO_REPARSE_TAG_LX_CHR_LE;
 717         else if (S_ISBLK(mode))
 718                 return IO_REPARSE_TAG_LX_BLK_LE;
 719
 720         return 0;
 721 }
 722
 723 /**
 724  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 725  * @stat:       kstat containing file mode
 726  * @attribute:  attribute flags
 727  *
 728  * Return:      converted dos mode
 729  */
 730 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 731 {
 732         int attr = 0;
 733
 734         if (S_ISDIR(stat->mode)) {
 735                 attr = ATTR_DIRECTORY |
 736                         (attribute & (ATTR_HIDDEN | ATTR_SYSTEM));
 737         } else {
 738                 attr = (attribute & 0x00005137) | ATTR_ARCHIVE;
 739                 attr &= ~(ATTR_DIRECTORY);
 740                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 741                                 FILE_SUPPORTS_SPARSE_FILES))
 742                         attr |= ATTR_SPARSE;
 743
 744                 if (smb2_get_reparse_tag_special_file(stat->mode))
 745                         attr |= ATTR_REPARSE;
 746         }
 747
 748         return attr;
 749 }
 750
 751 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 752                                __le16 hash_id)
 753 {
 754         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 755         pneg_ctxt->DataLength = cpu_to_le16(38);
 756         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 757         pneg_ctxt->Reserved = cpu_to_le32(0);
 758         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 759         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 760         pneg_ctxt->HashAlgorithms = hash_id;
 761 }
 762
 763 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 764                                __le16 cipher_type)
 765 {
 766         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 767         pneg_ctxt->DataLength = cpu_to_le16(4);
 768         pneg_ctxt->Reserved = cpu_to_le32(0);
 769         pneg_ctxt->CipherCount = cpu_to_le16(1);
 770         pneg_ctxt->Ciphers[0] = cipher_type;
 771 }
 772
 773 static void build_compression_ctxt(struct smb2_compression_ctx *pneg_ctxt,
 774                                    __le16 comp_algo)
 775 {
 776         pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
 777         pneg_ctxt->DataLength =
 778                 cpu_to_le16(sizeof(struct smb2_compression_ctx)
 779                         - sizeof(struct smb2_neg_context));
 780         pneg_ctxt->Reserved = cpu_to_le32(0);
 781         pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
 782         pneg_ctxt->Reserved1 = cpu_to_le32(0);
 783         pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
 784 }
 785
 786 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 787                                 __le16 sign_algo)
 788 {
 789         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 790         pneg_ctxt->DataLength =
 791                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 792                         - sizeof(struct smb2_neg_context));
 793         pneg_ctxt->Reserved = cpu_to_le32(0);
 794         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 795         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 796 }
 797
 798 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 799 {
 800         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 801         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 802         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 803         pneg_ctxt->Name[0] = 0x93;
 804         pneg_ctxt->Name[1] = 0xAD;
 805         pneg_ctxt->Name[2] = 0x25;
 806         pneg_ctxt->Name[3] = 0x50;
 807         pneg_ctxt->Name[4] = 0x9C;
 808         pneg_ctxt->Name[5] = 0xB4;
 809         pneg_ctxt->Name[6] = 0x11;
 810         pneg_ctxt->Name[7] = 0xE7;
 811         pneg_ctxt->Name[8] = 0xB4;
 812         pneg_ctxt->Name[9] = 0x23;
 813         pneg_ctxt->Name[10] = 0x83;
 814         pneg_ctxt->Name[11] = 0xDE;
 815         pneg_ctxt->Name[12] = 0x96;
 816         pneg_ctxt->Name[13] = 0x8B;
 817         pneg_ctxt->Name[14] = 0xCD;
 818         pneg_ctxt->Name[15] = 0x7C;
 819 }
 820
 821 static void assemble_neg_contexts(struct ksmbd_conn *conn,
 822                                   struct smb2_negotiate_rsp *rsp)
 823 {
 824         /* +4 is to account for the RFC1001 len field */
 825         char *pneg_ctxt = (char *)rsp +
 826                         le32_to_cpu(rsp->NegotiateContextOffset) + 4;
 827         int neg_ctxt_cnt = 1;
 828         int ctxt_size;
 829
 830         ksmbd_debug(SMB,
 831                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 832         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 833                            conn->preauth_info->Preauth_HashId);
 834         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 835         inc_rfc1001_len(rsp, AUTH_GSS_PADDING);
 836         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 837         /* Round to 8 byte boundary */
 838         pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
 839
 840         if (conn->cipher_type) {
 841                 ctxt_size = round_up(ctxt_size, 8);
 842                 ksmbd_debug(SMB,
 843                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 844                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
 845                                    conn->cipher_type);
 846                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 847                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 848                 /* Round to 8 byte boundary */
 849                 pneg_ctxt +=
 850                         round_up(sizeof(struct smb2_encryption_neg_context) + 2,
 851                                  8);
 852         }
 853
 854         if (conn->compress_algorithm) {
 855                 ctxt_size = round_up(ctxt_size, 8);
 856                 ksmbd_debug(SMB,
 857                             "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
 858                 /* Temporarily set to SMB3_COMPRESS_NONE */
 859                 build_compression_ctxt((struct smb2_compression_ctx *)pneg_ctxt,
 860                                        conn->compress_algorithm);
 861                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 862                 ctxt_size += sizeof(struct smb2_compression_ctx) + 2;
 863                 /* Round to 8 byte boundary */
 864                 pneg_ctxt += round_up(sizeof(struct smb2_compression_ctx) + 2,
 865                                       8);
 866         }
 867
 868         if (conn->posix_ext_supported) {
 869                 ctxt_size = round_up(ctxt_size, 8);
 870                 ksmbd_debug(SMB,
 871                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 872                 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
 873                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 874                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 875                 /* Round to 8 byte boundary */
 876                 pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
 877         }
 878
 879         if (conn->signing_negotiated) {
 880                 ctxt_size = round_up(ctxt_size, 8);
 881                 ksmbd_debug(SMB,
 882                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 883                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
 884                                     conn->signing_algorithm);
 885                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 886                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 887         }
 888
 889         inc_rfc1001_len(rsp, ctxt_size);
 890 }
 891
 892 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 893                                   struct smb2_preauth_neg_context *pneg_ctxt)
 894 {
 895         __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 896
 897         if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
 898                 conn->preauth_info->Preauth_HashId =
 899                         SMB2_PREAUTH_INTEGRITY_SHA512;
 900                 err = STATUS_SUCCESS;
 901         }
 902
 903         return err;
 904 }
 905
 906 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 907                                 struct smb2_encryption_neg_context *pneg_ctxt,
 908                                 int len_of_ctxts)
 909 {
 910         int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 911         int i, cphs_size = cph_cnt * sizeof(__le16);
 912
 913         conn->cipher_type = 0;
 914
 915         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 916             len_of_ctxts) {
 917                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 918                 return;
 919         }
 920
 921         if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
 922                 return;
 923
 924         for (i = 0; i < cph_cnt; i++) {
 925                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 926                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 927                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 928                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 929                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 930                                     pneg_ctxt->Ciphers[i]);
 931                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 932                         break;
 933                 }
 934         }
 935 }
 936
 937 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 938                                  struct smb2_compression_ctx *pneg_ctxt)
 939 {
 940         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 941 }
 942
 943 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 944                                  struct smb2_signing_capabilities *pneg_ctxt,
 945                                  int len_of_ctxts)
 946 {
 947         int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 948         int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
 949
 950         conn->signing_negotiated = false;
 951
 952         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 953             len_of_ctxts) {
 954                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 955                 return;
 956         }
 957
 958         for (i = 0; i < sign_algo_cnt; i++) {
 959                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256 ||
 960                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC) {
 961                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 962                                     pneg_ctxt->SigningAlgorithms[i]);
 963                         conn->signing_negotiated = true;
 964                         conn->signing_algorithm =
 965                                 pneg_ctxt->SigningAlgorithms[i];
 966                         break;
 967                 }
 968         }
 969 }
 970
 971 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 972                                       struct smb2_negotiate_req *req)
 973 {
 974         /* +4 is to account for the RFC1001 len field */
 975         struct smb2_neg_context *pctx = (struct smb2_neg_context *)((char *)req + 4);
 976         int i = 0, len_of_ctxts;
 977         int offset = le32_to_cpu(req->NegotiateContextOffset);
 978         int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
 979         int len_of_smb = be32_to_cpu(req->hdr.smb2_buf_length);
 980         __le32 status = STATUS_INVALID_PARAMETER;
 981
 982         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
 983         if (len_of_smb <= offset) {
 984                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
 985                 return status;
 986         }
 987
 988         len_of_ctxts = len_of_smb - offset;
 989
 990         while (i++ < neg_ctxt_cnt) {
 991                 int clen;
 992
 993                 /* check that offset is not beyond end of SMB */
 994                 if (len_of_ctxts == 0)
 995                         break;
 996
 997                 if (len_of_ctxts < sizeof(struct smb2_neg_context))
 998                         break;
 999
1000                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1001                 clen = le16_to_cpu(pctx->DataLength);
1002                 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
1003                         break;
1004
1005                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1006                         ksmbd_debug(SMB,
1007                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1008                         if (conn->preauth_info->Preauth_HashId)
1009                                 break;
1010
1011                         status = decode_preauth_ctxt(conn,
1012                                                      (struct smb2_preauth_neg_context *)pctx);
1013                         if (status != STATUS_SUCCESS)
1014                                 break;
1015                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1016                         ksmbd_debug(SMB,
1017                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1018                         if (conn->cipher_type)
1019                                 break;
1020
1021                         decode_encrypt_ctxt(conn,
1022                                             (struct smb2_encryption_neg_context *)pctx,
1023                                             len_of_ctxts);
1024                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1025                         ksmbd_debug(SMB,
1026                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1027                         if (conn->compress_algorithm)
1028                                 break;
1029
1030                         decode_compress_ctxt(conn,
1031                                              (struct smb2_compression_ctx *)pctx);
1032                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1033                         ksmbd_debug(SMB,
1034                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1035                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1036                         ksmbd_debug(SMB,
1037                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1038                         conn->posix_ext_supported = true;
1039                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1040                         ksmbd_debug(SMB,
1041                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1042                         decode_sign_cap_ctxt(conn,
1043                                              (struct smb2_signing_capabilities *)pctx,
1044                                              len_of_ctxts);
1045                 }
1046
1047                 /* offsets must be 8 byte aligned */
1048                 clen = (clen + 7) & ~0x7;
1049                 offset = clen + sizeof(struct smb2_neg_context);
1050                 len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1051         }
1052         return status;
1053 }
1054
1055 /**
1056  * smb2_handle_negotiate() - handler for smb2 negotiate command
1057  * @work:       smb work containing smb request buffer
1058  *
1059  * Return:      0
1060  */
1061 int smb2_handle_negotiate(struct ksmbd_work *work)
1062 {
1063         struct ksmbd_conn *conn = work->conn;
1064         struct smb2_negotiate_req *req = work->request_buf;
1065         struct smb2_negotiate_rsp *rsp = work->response_buf;
1066         int rc = 0;
1067         unsigned int smb2_buf_len, smb2_neg_size;
1068         __le32 status;
1069
1070         ksmbd_debug(SMB, "Received negotiate request\n");
1071         conn->need_neg = false;
1072         if (ksmbd_conn_good(work)) {
1073                 pr_err("conn->tcp_status is already in CifsGood State\n");
1074                 work->send_no_response = 1;
1075                 return rc;
1076         }
1077
1078         if (req->DialectCount == 0) {
1079                 pr_err("malformed packet\n");
1080                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1081                 rc = -EINVAL;
1082                 goto err_out;
1083         }
1084
1085         smb2_buf_len = get_rfc1002_len(work->request_buf);
1086         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects) - 4;
1087         if (smb2_neg_size > smb2_buf_len) {
1088                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1089                 rc = -EINVAL;
1090                 goto err_out;
1091         }
1092
1093         if (conn->dialect == SMB311_PROT_ID) {
1094                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1095
1096                 if (smb2_buf_len < nego_ctxt_off) {
1097                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1098                         rc = -EINVAL;
1099                         goto err_out;
1100                 }
1101
1102                 if (smb2_neg_size > nego_ctxt_off) {
1103                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1104                         rc = -EINVAL;
1105                         goto err_out;
1106                 }
1107
1108                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1109                     nego_ctxt_off) {
1110                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1111                         rc = -EINVAL;
1112                         goto err_out;
1113                 }
1114         } else {
1115                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1116                     smb2_buf_len) {
1117                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1118                         rc = -EINVAL;
1119                         goto err_out;
1120                 }
1121         }
1122
1123         conn->cli_cap = le32_to_cpu(req->Capabilities);
1124         switch (conn->dialect) {
1125         case SMB311_PROT_ID:
1126                 conn->preauth_info =
1127                         kzalloc(sizeof(struct preauth_integrity_info),
1128                                 GFP_KERNEL);
1129                 if (!conn->preauth_info) {
1130                         rc = -ENOMEM;
1131                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132                         goto err_out;
1133                 }
1134
1135                 status = deassemble_neg_contexts(conn, req);
1136                 if (status != STATUS_SUCCESS) {
1137                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1138                                status);
1139                         rsp->hdr.Status = status;
1140                         rc = -EINVAL;
1141                         goto err_out;
1142                 }
1143
1144                 rc = init_smb3_11_server(conn);
1145                 if (rc < 0) {
1146                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1147                         goto err_out;
1148                 }
1149
1150                 ksmbd_gen_preauth_integrity_hash(conn,
1151                                                  work->request_buf,
1152                                                  conn->preauth_info->Preauth_HashValue);
1153                 rsp->NegotiateContextOffset =
1154                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1155                 assemble_neg_contexts(conn, rsp);
1156                 break;
1157         case SMB302_PROT_ID:
1158                 init_smb3_02_server(conn);
1159                 break;
1160         case SMB30_PROT_ID:
1161                 init_smb3_0_server(conn);
1162                 break;
1163         case SMB21_PROT_ID:
1164                 init_smb2_1_server(conn);
1165                 break;
1166         case SMB2X_PROT_ID:
1167         case BAD_PROT_ID:
1168         default:
1169                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1170                             conn->dialect);
1171                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1172                 rc = -EINVAL;
1173                 goto err_out;
1174         }
1175         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1176
1177         /* For stats */
1178         conn->connection_type = conn->dialect;
1179
1180         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1181         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1182         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1183
1184         memcpy(conn->ClientGUID, req->ClientGUID,
1185                         SMB2_CLIENT_GUID_SIZE);
1186         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1187
1188         rsp->StructureSize = cpu_to_le16(65);
1189         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1190         /* Not setting conn guid rsp->ServerGUID, as it
1191          * not used by client for identifying server
1192          */
1193         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1194
1195         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1196         rsp->ServerStartTime = 0;
1197         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1198                     le32_to_cpu(rsp->NegotiateContextOffset),
1199                     le16_to_cpu(rsp->NegotiateContextCount));
1200
1201         rsp->SecurityBufferOffset = cpu_to_le16(128);
1202         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1203         ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
1204                                   sizeof(rsp->hdr.smb2_buf_length)) +
1205                                    le16_to_cpu(rsp->SecurityBufferOffset));
1206         inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
1207                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1208                          AUTH_GSS_LENGTH);
1209         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1210         conn->use_spnego = true;
1211
1212         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1213              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1214             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1215                 conn->sign = true;
1216         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1217                 server_conf.enforced_signing = true;
1218                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1219                 conn->sign = true;
1220         }
1221
1222         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1223         ksmbd_conn_set_need_negotiate(work);
1224
1225 err_out:
1226         if (rc < 0)
1227                 smb2_set_err_rsp(work);
1228
1229         return rc;
1230 }
1231
1232 static int alloc_preauth_hash(struct ksmbd_session *sess,
1233                               struct ksmbd_conn *conn)
1234 {
1235         if (sess->Preauth_HashValue)
1236                 return 0;
1237
1238         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1239                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1240         if (!sess->Preauth_HashValue)
1241                 return -ENOMEM;
1242
1243         return 0;
1244 }
1245
1246 static int generate_preauth_hash(struct ksmbd_work *work)
1247 {
1248         struct ksmbd_conn *conn = work->conn;
1249         struct ksmbd_session *sess = work->sess;
1250         u8 *preauth_hash;
1251
1252         if (conn->dialect != SMB311_PROT_ID)
1253                 return 0;
1254
1255         if (conn->binding) {
1256                 struct preauth_session *preauth_sess;
1257
1258                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1259                 if (!preauth_sess) {
1260                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1261                         if (!preauth_sess)
1262                                 return -ENOMEM;
1263                 }
1264
1265                 preauth_hash = preauth_sess->Preauth_HashValue;
1266         } else {
1267                 if (!sess->Preauth_HashValue)
1268                         if (alloc_preauth_hash(sess, conn))
1269                                 return -ENOMEM;
1270                 preauth_hash = sess->Preauth_HashValue;
1271         }
1272
1273         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1274         return 0;
1275 }
1276
1277 static int decode_negotiation_token(struct ksmbd_work *work,
1278                                     struct negotiate_message *negblob)
1279 {
1280         struct ksmbd_conn *conn = work->conn;
1281         struct smb2_sess_setup_req *req;
1282         int sz;
1283
1284         if (!conn->use_spnego)
1285                 return -EINVAL;
1286
1287         req = work->request_buf;
1288         sz = le16_to_cpu(req->SecurityBufferLength);
1289
1290         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1291                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1292                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1293                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1294                         conn->use_spnego = false;
1295                 }
1296         }
1297         return 0;
1298 }
1299
1300 static int ntlm_negotiate(struct ksmbd_work *work,
1301                           struct negotiate_message *negblob)
1302 {
1303         struct smb2_sess_setup_req *req = work->request_buf;
1304         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1305         struct challenge_message *chgblob;
1306         unsigned char *spnego_blob = NULL;
1307         u16 spnego_blob_len;
1308         char *neg_blob;
1309         int sz, rc;
1310
1311         ksmbd_debug(SMB, "negotiate phase\n");
1312         sz = le16_to_cpu(req->SecurityBufferLength);
1313         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, sz, work->sess);
1314         if (rc)
1315                 return rc;
1316
1317         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1318         chgblob =
1319                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1320         memset(chgblob, 0, sizeof(struct challenge_message));
1321
1322         if (!work->conn->use_spnego) {
1323                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
1324                 if (sz < 0)
1325                         return -ENOMEM;
1326
1327                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1328                 return 0;
1329         }
1330
1331         sz = sizeof(struct challenge_message);
1332         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1333
1334         neg_blob = kzalloc(sz, GFP_KERNEL);
1335         if (!neg_blob)
1336                 return -ENOMEM;
1337
1338         chgblob = (struct challenge_message *)neg_blob;
1339         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
1340         if (sz < 0) {
1341                 rc = -ENOMEM;
1342                 goto out;
1343         }
1344
1345         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1346                                            neg_blob, sz);
1347         if (rc) {
1348                 rc = -ENOMEM;
1349                 goto out;
1350         }
1351
1352         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1353         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1354         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1355
1356 out:
1357         kfree(spnego_blob);
1358         kfree(neg_blob);
1359         return rc;
1360 }
1361
1362 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1363                                                   struct smb2_sess_setup_req *req)
1364 {
1365         int sz;
1366
1367         if (conn->use_spnego && conn->mechToken)
1368                 return (struct authenticate_message *)conn->mechToken;
1369
1370         sz = le16_to_cpu(req->SecurityBufferOffset);
1371         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1372                                                + sz);
1373 }
1374
1375 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1376                                        struct smb2_sess_setup_req *req)
1377 {
1378         struct authenticate_message *authblob;
1379         struct ksmbd_user *user;
1380         char *name;
1381         int sz;
1382
1383         authblob = user_authblob(conn, req);
1384         sz = le32_to_cpu(authblob->UserName.BufferOffset);
1385         name = smb_strndup_from_utf16((const char *)authblob + sz,
1386                                       le16_to_cpu(authblob->UserName.Length),
1387                                       true,
1388                                       conn->local_nls);
1389         if (IS_ERR(name)) {
1390                 pr_err("cannot allocate memory\n");
1391                 return NULL;
1392         }
1393
1394         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1395         user = ksmbd_login_user(name);
1396         kfree(name);
1397         return user;
1398 }
1399
1400 static int ntlm_authenticate(struct ksmbd_work *work)
1401 {
1402         struct smb2_sess_setup_req *req = work->request_buf;
1403         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1404         struct ksmbd_conn *conn = work->conn;
1405         struct ksmbd_session *sess = work->sess;
1406         struct channel *chann = NULL;
1407         struct ksmbd_user *user;
1408         u64 prev_id;
1409         int sz, rc;
1410
1411         ksmbd_debug(SMB, "authenticate phase\n");
1412         if (conn->use_spnego) {
1413                 unsigned char *spnego_blob;
1414                 u16 spnego_blob_len;
1415
1416                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1417                                                     &spnego_blob_len,
1418                                                     0);
1419                 if (rc)
1420                         return -ENOMEM;
1421
1422                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1423                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1424                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1425                 kfree(spnego_blob);
1426                 inc_rfc1001_len(rsp, spnego_blob_len - 1);
1427         }
1428
1429         user = session_user(conn, req);
1430         if (!user) {
1431                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1432                 return -EPERM;
1433         }
1434
1435         /* Check for previous session */
1436         prev_id = le64_to_cpu(req->PreviousSessionId);
1437         if (prev_id && prev_id != sess->id)
1438                 destroy_previous_session(user, prev_id);
1439
1440         if (sess->state == SMB2_SESSION_VALID) {
1441                 /*
1442                  * Reuse session if anonymous try to connect
1443                  * on reauthetication.
1444                  */
1445                 if (ksmbd_anonymous_user(user)) {
1446                         ksmbd_free_user(user);
1447                         return 0;
1448                 }
1449                 ksmbd_free_user(sess->user);
1450         }
1451
1452         sess->user = user;
1453         if (user_guest(sess->user)) {
1454                 if (conn->sign) {
1455                         ksmbd_debug(SMB, "Guest login not allowed when signing enabled\n");
1456                         return -EPERM;
1457                 }
1458
1459                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1460         } else {
1461                 struct authenticate_message *authblob;
1462
1463                 authblob = user_authblob(conn, req);
1464                 sz = le16_to_cpu(req->SecurityBufferLength);
1465                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, sess);
1466                 if (rc) {
1467                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1468                         ksmbd_debug(SMB, "authentication failed\n");
1469                         return -EPERM;
1470                 }
1471
1472                 /*
1473                  * If session state is SMB2_SESSION_VALID, We can assume
1474                  * that it is reauthentication. And the user/password
1475                  * has been verified, so return it here.
1476                  */
1477                 if (sess->state == SMB2_SESSION_VALID) {
1478                         if (conn->binding)
1479                                 goto binding_session;
1480                         return 0;
1481                 }
1482
1483                 if ((conn->sign || server_conf.enforced_signing) ||
1484                     (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1485                         sess->sign = true;
1486
1487                 if (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION &&
1488                     conn->ops->generate_encryptionkey &&
1489                     !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1490                         rc = conn->ops->generate_encryptionkey(sess);
1491                         if (rc) {
1492                                 ksmbd_debug(SMB,
1493                                             "SMB3 encryption key generation failed\n");
1494                                 return -EINVAL;
1495                         }
1496                         sess->enc = true;
1497                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1498                         /*
1499                          * signing is disable if encryption is enable
1500                          * on this session
1501                          */
1502                         sess->sign = false;
1503                 }
1504         }
1505
1506 binding_session:
1507         if (conn->dialect >= SMB30_PROT_ID) {
1508                 chann = lookup_chann_list(sess, conn);
1509                 if (!chann) {
1510                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1511                         if (!chann)
1512                                 return -ENOMEM;
1513
1514                         chann->conn = conn;
1515                         INIT_LIST_HEAD(&chann->chann_list);
1516                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1517                 }
1518         }
1519
1520         if (conn->ops->generate_signingkey) {
1521                 rc = conn->ops->generate_signingkey(sess, conn);
1522                 if (rc) {
1523                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1524                         return -EINVAL;
1525                 }
1526         }
1527
1528         if (!ksmbd_conn_lookup_dialect(conn)) {
1529                 pr_err("fail to verify the dialect\n");
1530                 return -ENOENT;
1531         }
1532         return 0;
1533 }
1534
1535 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1536 static int krb5_authenticate(struct ksmbd_work *work)
1537 {
1538         struct smb2_sess_setup_req *req = work->request_buf;
1539         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1540         struct ksmbd_conn *conn = work->conn;
1541         struct ksmbd_session *sess = work->sess;
1542         char *in_blob, *out_blob;
1543         struct channel *chann = NULL;
1544         u64 prev_sess_id;
1545         int in_len, out_len;
1546         int retval;
1547
1548         in_blob = (char *)&req->hdr.ProtocolId +
1549                 le16_to_cpu(req->SecurityBufferOffset);
1550         in_len = le16_to_cpu(req->SecurityBufferLength);
1551         out_blob = (char *)&rsp->hdr.ProtocolId +
1552                 le16_to_cpu(rsp->SecurityBufferOffset);
1553         out_len = work->response_sz -
1554                 offsetof(struct smb2_hdr, smb2_buf_length) -
1555                 le16_to_cpu(rsp->SecurityBufferOffset);
1556
1557         /* Check previous session */
1558         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1559         if (prev_sess_id && prev_sess_id != sess->id)
1560                 destroy_previous_session(sess->user, prev_sess_id);
1561
1562         if (sess->state == SMB2_SESSION_VALID)
1563                 ksmbd_free_user(sess->user);
1564
1565         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1566                                          out_blob, &out_len);
1567         if (retval) {
1568                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1569                 return -EINVAL;
1570         }
1571         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1572         inc_rfc1001_len(rsp, out_len - 1);
1573
1574         if ((conn->sign || server_conf.enforced_signing) ||
1575             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1576                 sess->sign = true;
1577
1578         if ((conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) &&
1579             conn->ops->generate_encryptionkey) {
1580                 retval = conn->ops->generate_encryptionkey(sess);
1581                 if (retval) {
1582                         ksmbd_debug(SMB,
1583                                     "SMB3 encryption key generation failed\n");
1584                         return -EINVAL;
1585                 }
1586                 sess->enc = true;
1587                 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1588                 sess->sign = false;
1589         }
1590
1591         if (conn->dialect >= SMB30_PROT_ID) {
1592                 chann = lookup_chann_list(sess, conn);
1593                 if (!chann) {
1594                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1595                         if (!chann)
1596                                 return -ENOMEM;
1597
1598                         chann->conn = conn;
1599                         INIT_LIST_HEAD(&chann->chann_list);
1600                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1601                 }
1602         }
1603
1604         if (conn->ops->generate_signingkey) {
1605                 retval = conn->ops->generate_signingkey(sess, conn);
1606                 if (retval) {
1607                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1608                         return -EINVAL;
1609                 }
1610         }
1611
1612         if (!ksmbd_conn_lookup_dialect(conn)) {
1613                 pr_err("fail to verify the dialect\n");
1614                 return -ENOENT;
1615         }
1616         return 0;
1617 }
1618 #else
1619 static int krb5_authenticate(struct ksmbd_work *work)
1620 {
1621         return -EOPNOTSUPP;
1622 }
1623 #endif
1624
1625 int smb2_sess_setup(struct ksmbd_work *work)
1626 {
1627         struct ksmbd_conn *conn = work->conn;
1628         struct smb2_sess_setup_req *req = work->request_buf;
1629         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1630         struct ksmbd_session *sess;
1631         struct negotiate_message *negblob;
1632         int rc = 0;
1633
1634         ksmbd_debug(SMB, "Received request for session setup\n");
1635
1636         rsp->StructureSize = cpu_to_le16(9);
1637         rsp->SessionFlags = 0;
1638         rsp->SecurityBufferOffset = cpu_to_le16(72);
1639         rsp->SecurityBufferLength = 0;
1640         inc_rfc1001_len(rsp, 9);
1641
1642         if (!req->hdr.SessionId) {
1643                 sess = ksmbd_smb2_session_create();
1644                 if (!sess) {
1645                         rc = -ENOMEM;
1646                         goto out_err;
1647                 }
1648                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1649                 ksmbd_session_register(conn, sess);
1650         } else if (conn->dialect >= SMB30_PROT_ID &&
1651                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1652                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1653                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1654
1655                 sess = ksmbd_session_lookup_slowpath(sess_id);
1656                 if (!sess) {
1657                         rc = -ENOENT;
1658                         goto out_err;
1659                 }
1660
1661                 if (conn->dialect != sess->conn->dialect) {
1662                         rc = -EINVAL;
1663                         goto out_err;
1664                 }
1665
1666                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1667                         rc = -EINVAL;
1668                         goto out_err;
1669                 }
1670
1671                 if (strncmp(conn->ClientGUID, sess->conn->ClientGUID,
1672                             SMB2_CLIENT_GUID_SIZE)) {
1673                         rc = -ENOENT;
1674                         goto out_err;
1675                 }
1676
1677                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1678                         rc = -EACCES;
1679                         goto out_err;
1680                 }
1681
1682                 if (sess->state == SMB2_SESSION_EXPIRED) {
1683                         rc = -EFAULT;
1684                         goto out_err;
1685                 }
1686
1687                 if (ksmbd_session_lookup(conn, sess_id)) {
1688                         rc = -EACCES;
1689                         goto out_err;
1690                 }
1691
1692                 conn->binding = true;
1693         } else if ((conn->dialect < SMB30_PROT_ID ||
1694                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1695                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1696                 sess = NULL;
1697                 rc = -EACCES;
1698                 goto out_err;
1699         } else {
1700                 sess = ksmbd_session_lookup(conn,
1701                                             le64_to_cpu(req->hdr.SessionId));
1702                 if (!sess) {
1703                         rc = -ENOENT;
1704                         goto out_err;
1705                 }
1706         }
1707         work->sess = sess;
1708
1709         if (sess->state == SMB2_SESSION_EXPIRED)
1710                 sess->state = SMB2_SESSION_IN_PROGRESS;
1711
1712         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1713                         le16_to_cpu(req->SecurityBufferOffset));
1714
1715         if (decode_negotiation_token(work, negblob) == 0) {
1716                 if (conn->mechToken)
1717                         negblob = (struct negotiate_message *)conn->mechToken;
1718         }
1719
1720         if (server_conf.auth_mechs & conn->auth_mechs) {
1721                 rc = generate_preauth_hash(work);
1722                 if (rc)
1723                         goto out_err;
1724
1725                 if (conn->preferred_auth_mech &
1726                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1727                         rc = krb5_authenticate(work);
1728                         if (rc) {
1729                                 rc = -EINVAL;
1730                                 goto out_err;
1731                         }
1732
1733                         ksmbd_conn_set_good(work);
1734                         sess->state = SMB2_SESSION_VALID;
1735                         kfree(sess->Preauth_HashValue);
1736                         sess->Preauth_HashValue = NULL;
1737                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1738                         if (negblob->MessageType == NtLmNegotiate) {
1739                                 rc = ntlm_negotiate(work, negblob);
1740                                 if (rc)
1741                                         goto out_err;
1742                                 rsp->hdr.Status =
1743                                         STATUS_MORE_PROCESSING_REQUIRED;
1744                                 /*
1745                                  * Note: here total size -1 is done as an
1746                                  * adjustment for 0 size blob
1747                                  */
1748                                 inc_rfc1001_len(rsp, le16_to_cpu(rsp->SecurityBufferLength) - 1);
1749
1750                         } else if (negblob->MessageType == NtLmAuthenticate) {
1751                                 rc = ntlm_authenticate(work);
1752                                 if (rc)
1753                                         goto out_err;
1754
1755                                 ksmbd_conn_set_good(work);
1756                                 sess->state = SMB2_SESSION_VALID;
1757                                 if (conn->binding) {
1758                                         struct preauth_session *preauth_sess;
1759
1760                                         preauth_sess =
1761                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1762                                         if (preauth_sess) {
1763                                                 list_del(&preauth_sess->preauth_entry);
1764                                                 kfree(preauth_sess);
1765                                         }
1766                                 }
1767                                 kfree(sess->Preauth_HashValue);
1768                                 sess->Preauth_HashValue = NULL;
1769                         }
1770                 } else {
1771                         /* TODO: need one more negotiation */
1772                         pr_err("Not support the preferred authentication\n");
1773                         rc = -EINVAL;
1774                 }
1775         } else {
1776                 pr_err("Not support authentication\n");
1777                 rc = -EINVAL;
1778         }
1779
1780 out_err:
1781         if (rc == -EINVAL)
1782                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1783         else if (rc == -ENOENT)
1784                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1785         else if (rc == -EACCES)
1786                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1787         else if (rc == -EFAULT)
1788                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1789         else if (rc == -ENOMEM)
1790                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1791         else if (rc)
1792                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1793
1794         if (conn->use_spnego && conn->mechToken) {
1795                 kfree(conn->mechToken);
1796                 conn->mechToken = NULL;
1797         }
1798
1799         if (rc < 0 && sess) {
1800                 ksmbd_session_destroy(sess);
1801                 work->sess = NULL;
1802         }
1803
1804         return rc;
1805 }
1806
1807 /**
1808  * smb2_tree_connect() - handler for smb2 tree connect command
1809  * @work:       smb work containing smb request buffer
1810  *
1811  * Return:      0 on success, otherwise error
1812  */
1813 int smb2_tree_connect(struct ksmbd_work *work)
1814 {
1815         struct ksmbd_conn *conn = work->conn;
1816         struct smb2_tree_connect_req *req = work->request_buf;
1817         struct smb2_tree_connect_rsp *rsp = work->response_buf;
1818         struct ksmbd_session *sess = work->sess;
1819         char *treename = NULL, *name = NULL;
1820         struct ksmbd_tree_conn_status status;
1821         struct ksmbd_share_config *share;
1822         int rc = -EINVAL;
1823
1824         treename = smb_strndup_from_utf16(req->Buffer,
1825                                           le16_to_cpu(req->PathLength), true,
1826                                           conn->local_nls);
1827         if (IS_ERR(treename)) {
1828                 pr_err("treename is NULL\n");
1829                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1830                 goto out_err1;
1831         }
1832
1833         name = ksmbd_extract_sharename(treename);
1834         if (IS_ERR(name)) {
1835                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1836                 goto out_err1;
1837         }
1838
1839         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1840                     name, treename);
1841
1842         status = ksmbd_tree_conn_connect(sess, name);
1843         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1844                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1845         else
1846                 goto out_err1;
1847
1848         share = status.tree_conn->share_conf;
1849         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1850                 ksmbd_debug(SMB, "IPC share path request\n");
1851                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1852                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1853                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1854                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1855                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1856                         FILE_SYNCHRONIZE_LE;
1857         } else {
1858                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1859                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1860                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1861                 if (test_tree_conn_flag(status.tree_conn,
1862                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1863                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1864                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1865                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1866                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1867                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1868                                 FILE_SYNCHRONIZE_LE;
1869                 }
1870         }
1871
1872         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1873         if (conn->posix_ext_supported)
1874                 status.tree_conn->posix_extensions = true;
1875
1876 out_err1:
1877         rsp->StructureSize = cpu_to_le16(16);
1878         rsp->Capabilities = 0;
1879         rsp->Reserved = 0;
1880         /* default manual caching */
1881         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1882         inc_rfc1001_len(rsp, 16);
1883
1884         if (!IS_ERR(treename))
1885                 kfree(treename);
1886         if (!IS_ERR(name))
1887                 kfree(name);
1888
1889         switch (status.ret) {
1890         case KSMBD_TREE_CONN_STATUS_OK:
1891                 rsp->hdr.Status = STATUS_SUCCESS;
1892                 rc = 0;
1893                 break;
1894         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1895                 rsp->hdr.Status = STATUS_BAD_NETWORK_PATH;
1896                 break;
1897         case -ENOMEM:
1898         case KSMBD_TREE_CONN_STATUS_NOMEM:
1899                 rsp->hdr.Status = STATUS_NO_MEMORY;
1900                 break;
1901         case KSMBD_TREE_CONN_STATUS_ERROR:
1902         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1903         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1904                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1905                 break;
1906         case -EINVAL:
1907                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1908                 break;
1909         default:
1910                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1911         }
1912
1913         return rc;
1914 }
1915
1916 /**
1917  * smb2_create_open_flags() - convert smb open flags to unix open flags
1918  * @file_present:       is file already present
1919  * @access:             file access flags
1920  * @disposition:        file disposition flags
1921  * @may_flags:          set with MAY_ flags
1922  *
1923  * Return:      file open flags
1924  */
1925 static int smb2_create_open_flags(bool file_present, __le32 access,
1926                                   __le32 disposition,
1927                                   int *may_flags)
1928 {
1929         int oflags = O_NONBLOCK | O_LARGEFILE;
1930
1931         if (access & FILE_READ_DESIRED_ACCESS_LE &&
1932             access & FILE_WRITE_DESIRE_ACCESS_LE) {
1933                 oflags |= O_RDWR;
1934                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1935         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1936                 oflags |= O_WRONLY;
1937                 *may_flags = MAY_OPEN | MAY_WRITE;
1938         } else {
1939                 oflags |= O_RDONLY;
1940                 *may_flags = MAY_OPEN | MAY_READ;
1941         }
1942
1943         if (access == FILE_READ_ATTRIBUTES_LE)
1944                 oflags |= O_PATH;
1945
1946         if (file_present) {
1947                 switch (disposition & FILE_CREATE_MASK_LE) {
1948                 case FILE_OPEN_LE:
1949                 case FILE_CREATE_LE:
1950                         break;
1951                 case FILE_SUPERSEDE_LE:
1952                 case FILE_OVERWRITE_LE:
1953                 case FILE_OVERWRITE_IF_LE:
1954                         oflags |= O_TRUNC;
1955                         break;
1956                 default:
1957                         break;
1958                 }
1959         } else {
1960                 switch (disposition & FILE_CREATE_MASK_LE) {
1961                 case FILE_SUPERSEDE_LE:
1962                 case FILE_CREATE_LE:
1963                 case FILE_OPEN_IF_LE:
1964                 case FILE_OVERWRITE_IF_LE:
1965                         oflags |= O_CREAT;
1966                         break;
1967                 case FILE_OPEN_LE:
1968                 case FILE_OVERWRITE_LE:
1969                         oflags &= ~O_CREAT;
1970                         break;
1971                 default:
1972                         break;
1973                 }
1974         }
1975
1976         return oflags;
1977 }
1978
1979 /**
1980  * smb2_tree_disconnect() - handler for smb tree connect request
1981  * @work:       smb work containing request buffer
1982  *
1983  * Return:      0
1984  */
1985 int smb2_tree_disconnect(struct ksmbd_work *work)
1986 {
1987         struct smb2_tree_disconnect_rsp *rsp = work->response_buf;
1988         struct ksmbd_session *sess = work->sess;
1989         struct ksmbd_tree_connect *tcon = work->tcon;
1990
1991         rsp->StructureSize = cpu_to_le16(4);
1992         inc_rfc1001_len(rsp, 4);
1993
1994         ksmbd_debug(SMB, "request\n");
1995
1996         if (!tcon) {
1997                 struct smb2_tree_disconnect_req *req = work->request_buf;
1998
1999                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2000                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2001                 smb2_set_err_rsp(work);
2002                 return 0;
2003         }
2004
2005         ksmbd_close_tree_conn_fds(work);
2006         ksmbd_tree_conn_disconnect(sess, tcon);
2007         return 0;
2008 }
2009
2010 /**
2011  * smb2_session_logoff() - handler for session log off request
2012  * @work:       smb work containing request buffer
2013  *
2014  * Return:      0
2015  */
2016 int smb2_session_logoff(struct ksmbd_work *work)
2017 {
2018         struct ksmbd_conn *conn = work->conn;
2019         struct smb2_logoff_rsp *rsp = work->response_buf;
2020         struct ksmbd_session *sess = work->sess;
2021
2022         rsp->StructureSize = cpu_to_le16(4);
2023         inc_rfc1001_len(rsp, 4);
2024
2025         ksmbd_debug(SMB, "request\n");
2026
2027         /* Got a valid session, set connection state */
2028         WARN_ON(sess->conn != conn);
2029
2030         /* setting CifsExiting here may race with start_tcp_sess */
2031         ksmbd_conn_set_need_reconnect(work);
2032         ksmbd_close_session_fds(work);
2033         ksmbd_conn_wait_idle(conn);
2034
2035         if (ksmbd_tree_conn_session_logoff(sess)) {
2036                 struct smb2_logoff_req *req = work->request_buf;
2037
2038                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2039                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2040                 smb2_set_err_rsp(work);
2041                 return 0;
2042         }
2043
2044         ksmbd_destroy_file_table(&sess->file_table);
2045         sess->state = SMB2_SESSION_EXPIRED;
2046
2047         ksmbd_free_user(sess->user);
2048         sess->user = NULL;
2049
2050         /* let start_tcp_sess free connection info now */
2051         ksmbd_conn_set_need_negotiate(work);
2052         return 0;
2053 }
2054
2055 /**
2056  * create_smb2_pipe() - create IPC pipe
2057  * @work:       smb work containing request buffer
2058  *
2059  * Return:      0 on success, otherwise error
2060  */
2061 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2062 {
2063         struct smb2_create_rsp *rsp = work->response_buf;
2064         struct smb2_create_req *req = work->request_buf;
2065         int id;
2066         int err;
2067         char *name;
2068
2069         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2070                                       1, work->conn->local_nls);
2071         if (IS_ERR(name)) {
2072                 rsp->hdr.Status = STATUS_NO_MEMORY;
2073                 err = PTR_ERR(name);
2074                 goto out;
2075         }
2076
2077         id = ksmbd_session_rpc_open(work->sess, name);
2078         if (id < 0) {
2079                 pr_err("Unable to open RPC pipe: %d\n", id);
2080                 err = id;
2081                 goto out;
2082         }
2083
2084         rsp->hdr.Status = STATUS_SUCCESS;
2085         rsp->StructureSize = cpu_to_le16(89);
2086         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2087         rsp->Reserved = 0;
2088         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2089
2090         rsp->CreationTime = cpu_to_le64(0);
2091         rsp->LastAccessTime = cpu_to_le64(0);
2092         rsp->ChangeTime = cpu_to_le64(0);
2093         rsp->AllocationSize = cpu_to_le64(0);
2094         rsp->EndofFile = cpu_to_le64(0);
2095         rsp->FileAttributes = ATTR_NORMAL_LE;
2096         rsp->Reserved2 = 0;
2097         rsp->VolatileFileId = cpu_to_le64(id);
2098         rsp->PersistentFileId = 0;
2099         rsp->CreateContextsOffset = 0;
2100         rsp->CreateContextsLength = 0;
2101
2102         inc_rfc1001_len(rsp, 88); /* StructureSize - 1*/
2103         kfree(name);
2104         return 0;
2105
2106 out:
2107         switch (err) {
2108         case -EINVAL:
2109                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2110                 break;
2111         case -ENOSPC:
2112         case -ENOMEM:
2113                 rsp->hdr.Status = STATUS_NO_MEMORY;
2114                 break;
2115         }
2116
2117         if (!IS_ERR(name))
2118                 kfree(name);
2119
2120         smb2_set_err_rsp(work);
2121         return err;
2122 }
2123
2124 /**
2125  * smb2_set_ea() - handler for setting extended attributes using set
2126  *              info command
2127  * @eabuf:      set info command buffer
2128  * @buf_len:    set info command buffer length
2129  * @path:       dentry path for get ea
2130  *
2131  * Return:      0 on success, otherwise error
2132  */
2133 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2134                        struct path *path)
2135 {
2136         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2137         char *attr_name = NULL, *value;
2138         int rc = 0;
2139         unsigned int next = 0;
2140
2141         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2142                         le16_to_cpu(eabuf->EaValueLength))
2143                 return -EINVAL;
2144
2145         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2146         if (!attr_name)
2147                 return -ENOMEM;
2148
2149         do {
2150                 if (!eabuf->EaNameLength)
2151                         goto next;
2152
2153                 ksmbd_debug(SMB,
2154                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2155                             eabuf->name, eabuf->EaNameLength,
2156                             le16_to_cpu(eabuf->EaValueLength),
2157                             le32_to_cpu(eabuf->NextEntryOffset));
2158
2159                 if (eabuf->EaNameLength >
2160                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2161                         rc = -EINVAL;
2162                         break;
2163                 }
2164
2165                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2166                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2167                        eabuf->EaNameLength);
2168                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2169                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2170
2171                 if (!eabuf->EaValueLength) {
2172                         rc = ksmbd_vfs_casexattr_len(user_ns,
2173                                                      path->dentry,
2174                                                      attr_name,
2175                                                      XATTR_USER_PREFIX_LEN +
2176                                                      eabuf->EaNameLength);
2177
2178                         /* delete the EA only when it exits */
2179                         if (rc > 0) {
2180                                 rc = ksmbd_vfs_remove_xattr(user_ns,
2181                                                             path->dentry,
2182                                                             attr_name);
2183
2184                                 if (rc < 0) {
2185                                         ksmbd_debug(SMB,
2186                                                     "remove xattr failed(%d)\n",
2187                                                     rc);
2188                                         break;
2189                                 }
2190                         }
2191
2192                         /* if the EA doesn't exist, just do nothing. */
2193                         rc = 0;
2194                 } else {
2195                         rc = ksmbd_vfs_setxattr(user_ns,
2196                                                 path->dentry, attr_name, value,
2197                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2198                         if (rc < 0) {
2199                                 ksmbd_debug(SMB,
2200                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2201                                             rc);
2202                                 break;
2203                         }
2204                 }
2205
2206 next:
2207                 next = le32_to_cpu(eabuf->NextEntryOffset);
2208                 if (next == 0 || buf_len < next)
2209                         break;
2210                 buf_len -= next;
2211                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2212                 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2213                         break;
2214
2215         } while (next != 0);
2216
2217         kfree(attr_name);
2218         return rc;
2219 }
2220
2221 static noinline int smb2_set_stream_name_xattr(struct path *path,
2222                                                struct ksmbd_file *fp,
2223                                                char *stream_name, int s_type)
2224 {
2225         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2226         size_t xattr_stream_size;
2227         char *xattr_stream_name;
2228         int rc;
2229
2230         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2231                                          &xattr_stream_name,
2232                                          &xattr_stream_size,
2233                                          s_type);
2234         if (rc)
2235                 return rc;
2236
2237         fp->stream.name = xattr_stream_name;
2238         fp->stream.size = xattr_stream_size;
2239
2240         /* Check if there is stream prefix in xattr space */
2241         rc = ksmbd_vfs_casexattr_len(user_ns,
2242                                      path->dentry,
2243                                      xattr_stream_name,
2244                                      xattr_stream_size);
2245         if (rc >= 0)
2246                 return 0;
2247
2248         if (fp->cdoption == FILE_OPEN_LE) {
2249                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2250                 return -EBADF;
2251         }
2252
2253         rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2254                                 xattr_stream_name, NULL, 0, 0);
2255         if (rc < 0)
2256                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2257         return 0;
2258 }
2259
2260 static int smb2_remove_smb_xattrs(struct path *path)
2261 {
2262         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2263         char *name, *xattr_list = NULL;
2264         ssize_t xattr_list_len;
2265         int err = 0;
2266
2267         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2268         if (xattr_list_len < 0) {
2269                 goto out;
2270         } else if (!xattr_list_len) {
2271                 ksmbd_debug(SMB, "empty xattr in the file\n");
2272                 goto out;
2273         }
2274
2275         for (name = xattr_list; name - xattr_list < xattr_list_len;
2276                         name += strlen(name) + 1) {
2277                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2278
2279                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2280                     strncmp(&name[XATTR_USER_PREFIX_LEN], DOS_ATTRIBUTE_PREFIX,
2281                             DOS_ATTRIBUTE_PREFIX_LEN) &&
2282                     strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN))
2283                         continue;
2284
2285                 err = ksmbd_vfs_remove_xattr(user_ns, path->dentry, name);
2286                 if (err)
2287                         ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
2288         }
2289 out:
2290         kvfree(xattr_list);
2291         return err;
2292 }
2293
2294 static int smb2_create_truncate(struct path *path)
2295 {
2296         int rc = vfs_truncate(path, 0);
2297
2298         if (rc) {
2299                 pr_err("vfs_truncate failed, rc %d\n", rc);
2300                 return rc;
2301         }
2302
2303         rc = smb2_remove_smb_xattrs(path);
2304         if (rc == -EOPNOTSUPP)
2305                 rc = 0;
2306         if (rc)
2307                 ksmbd_debug(SMB,
2308                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2309                             rc);
2310         return rc;
2311 }
2312
2313 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path,
2314                             struct ksmbd_file *fp)
2315 {
2316         struct xattr_dos_attrib da = {0};
2317         int rc;
2318
2319         if (!test_share_config_flag(tcon->share_conf,
2320                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2321                 return;
2322
2323         da.version = 4;
2324         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2325         da.itime = da.create_time = fp->create_time;
2326         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2327                 XATTR_DOSINFO_ITIME;
2328
2329         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2330                                             path->dentry, &da);
2331         if (rc)
2332                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2333 }
2334
2335 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2336                                struct path *path, struct ksmbd_file *fp)
2337 {
2338         struct xattr_dos_attrib da;
2339         int rc;
2340
2341         fp->f_ci->m_fattr &= ~(ATTR_HIDDEN_LE | ATTR_SYSTEM_LE);
2342
2343         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2344         if (!test_share_config_flag(tcon->share_conf,
2345                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2346                 return;
2347
2348         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2349                                             path->dentry, &da);
2350         if (rc > 0) {
2351                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2352                 fp->create_time = da.create_time;
2353                 fp->itime = da.itime;
2354         }
2355 }
2356
2357 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2358                       int open_flags, umode_t posix_mode, bool is_dir)
2359 {
2360         struct ksmbd_tree_connect *tcon = work->tcon;
2361         struct ksmbd_share_config *share = tcon->share_conf;
2362         umode_t mode;
2363         int rc;
2364
2365         if (!(open_flags & O_CREAT))
2366                 return -EBADF;
2367
2368         ksmbd_debug(SMB, "file does not exist, so creating\n");
2369         if (is_dir == true) {
2370                 ksmbd_debug(SMB, "creating directory\n");
2371
2372                 mode = share_config_directory_mode(share, posix_mode);
2373                 rc = ksmbd_vfs_mkdir(work, name, mode);
2374                 if (rc)
2375                         return rc;
2376         } else {
2377                 ksmbd_debug(SMB, "creating regular file\n");
2378
2379                 mode = share_config_create_mode(share, posix_mode);
2380                 rc = ksmbd_vfs_create(work, name, mode);
2381                 if (rc)
2382                         return rc;
2383         }
2384
2385         rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2386         if (rc) {
2387                 pr_err("cannot get linux path (%s), err = %d\n",
2388                        name, rc);
2389                 return rc;
2390         }
2391         return 0;
2392 }
2393
2394 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2395                                  struct smb2_create_req *req,
2396                                  struct path *path)
2397 {
2398         struct create_context *context;
2399         struct create_sd_buf_req *sd_buf;
2400
2401         if (!req->CreateContextsOffset)
2402                 return -ENOENT;
2403
2404         /* Parse SD BUFFER create contexts */
2405         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2406         if (!context)
2407                 return -ENOENT;
2408         else if (IS_ERR(context))
2409                 return PTR_ERR(context);
2410
2411         ksmbd_debug(SMB,
2412                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2413         sd_buf = (struct create_sd_buf_req *)context;
2414         if (le16_to_cpu(context->DataOffset) +
2415             le32_to_cpu(context->DataLength) <
2416             sizeof(struct create_sd_buf_req))
2417                 return -EINVAL;
2418         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2419                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2420 }
2421
2422 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2423                              struct user_namespace *mnt_userns,
2424                              struct inode *inode)
2425 {
2426         fattr->cf_uid = i_uid_into_mnt(mnt_userns, inode);
2427         fattr->cf_gid = i_gid_into_mnt(mnt_userns, inode);
2428         fattr->cf_mode = inode->i_mode;
2429         fattr->cf_acls = NULL;
2430         fattr->cf_dacls = NULL;
2431
2432         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2433                 fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
2434                 if (S_ISDIR(inode->i_mode))
2435                         fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
2436         }
2437 }
2438
2439 /**
2440  * smb2_open() - handler for smb file open request
2441  * @work:       smb work containing request buffer
2442  *
2443  * Return:      0 on success, otherwise error
2444  */
2445 int smb2_open(struct ksmbd_work *work)
2446 {
2447         struct ksmbd_conn *conn = work->conn;
2448         struct ksmbd_session *sess = work->sess;
2449         struct ksmbd_tree_connect *tcon = work->tcon;
2450         struct smb2_create_req *req;
2451         struct smb2_create_rsp *rsp, *rsp_org;
2452         struct path path;
2453         struct ksmbd_share_config *share = tcon->share_conf;
2454         struct ksmbd_file *fp = NULL;
2455         struct file *filp = NULL;
2456         struct user_namespace *user_ns = NULL;
2457         struct kstat stat;
2458         struct create_context *context;
2459         struct lease_ctx_info *lc = NULL;
2460         struct create_ea_buf_req *ea_buf = NULL;
2461         struct oplock_info *opinfo;
2462         __le32 *next_ptr = NULL;
2463         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2464         int rc = 0;
2465         int contxt_cnt = 0, query_disk_id = 0;
2466         int maximal_access_ctxt = 0, posix_ctxt = 0;
2467         int s_type = 0;
2468         int next_off = 0;
2469         char *name = NULL;
2470         char *stream_name = NULL;
2471         bool file_present = false, created = false, already_permitted = false;
2472         int share_ret, need_truncate = 0;
2473         u64 time;
2474         umode_t posix_mode = 0;
2475         __le32 daccess, maximal_access = 0;
2476
2477         rsp_org = work->response_buf;
2478         WORK_BUFFERS(work, req, rsp);
2479
2480         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2481             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2482                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2483                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2484                 smb2_set_err_rsp(work);
2485                 return -EINVAL;
2486         }
2487
2488         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2489                 ksmbd_debug(SMB, "IPC pipe create request\n");
2490                 return create_smb2_pipe(work);
2491         }
2492
2493         if (req->NameLength) {
2494                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2495                     *(char *)req->Buffer == '\\') {
2496                         pr_err("not allow directory name included leading slash\n");
2497                         rc = -EINVAL;
2498                         goto err_out1;
2499                 }
2500
2501                 name = smb2_get_name(share,
2502                                      req->Buffer,
2503                                      le16_to_cpu(req->NameLength),
2504                                      work->conn->local_nls);
2505                 if (IS_ERR(name)) {
2506                         rc = PTR_ERR(name);
2507                         if (rc != -ENOMEM)
2508                                 rc = -ENOENT;
2509                         name = NULL;
2510                         goto err_out1;
2511                 }
2512
2513                 ksmbd_debug(SMB, "converted name = %s\n", name);
2514                 if (strchr(name, ':')) {
2515                         if (!test_share_config_flag(work->tcon->share_conf,
2516                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2517                                 rc = -EBADF;
2518                                 goto err_out1;
2519                         }
2520                         rc = parse_stream_name(name, &stream_name, &s_type);
2521                         if (rc < 0)
2522                                 goto err_out1;
2523                 }
2524
2525                 rc = ksmbd_validate_filename(name);
2526                 if (rc < 0)
2527                         goto err_out1;
2528
2529                 if (ksmbd_share_veto_filename(share, name)) {
2530                         rc = -ENOENT;
2531                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2532                                     name);
2533                         goto err_out1;
2534                 }
2535         } else {
2536                 name = kstrdup("", GFP_KERNEL);
2537                 if (!name) {
2538                         rc = -ENOMEM;
2539                         goto err_out1;
2540                 }
2541         }
2542
2543         req_op_level = req->RequestedOplockLevel;
2544         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2545                 lc = parse_lease_state(req);
2546
2547         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE_LE)) {
2548                 pr_err("Invalid impersonationlevel : 0x%x\n",
2549                        le32_to_cpu(req->ImpersonationLevel));
2550                 rc = -EIO;
2551                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2552                 goto err_out1;
2553         }
2554
2555         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK)) {
2556                 pr_err("Invalid create options : 0x%x\n",
2557                        le32_to_cpu(req->CreateOptions));
2558                 rc = -EINVAL;
2559                 goto err_out1;
2560         } else {
2561                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2562                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2563                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2564
2565                 if (req->CreateOptions &
2566                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2567                      FILE_RESERVE_OPFILTER_LE)) {
2568                         rc = -EOPNOTSUPP;
2569                         goto err_out1;
2570                 }
2571
2572                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2573                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2574                                 rc = -EINVAL;
2575                                 goto err_out1;
2576                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2577                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2578                         }
2579                 }
2580         }
2581
2582         if (le32_to_cpu(req->CreateDisposition) >
2583             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2584                 pr_err("Invalid create disposition : 0x%x\n",
2585                        le32_to_cpu(req->CreateDisposition));
2586                 rc = -EINVAL;
2587                 goto err_out1;
2588         }
2589
2590         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2591                 pr_err("Invalid desired access : 0x%x\n",
2592                        le32_to_cpu(req->DesiredAccess));
2593                 rc = -EACCES;
2594                 goto err_out1;
2595         }
2596
2597         if (req->FileAttributes && !(req->FileAttributes & ATTR_MASK_LE)) {
2598                 pr_err("Invalid file attribute : 0x%x\n",
2599                        le32_to_cpu(req->FileAttributes));
2600                 rc = -EINVAL;
2601                 goto err_out1;
2602         }
2603
2604         if (req->CreateContextsOffset) {
2605                 /* Parse non-durable handle create contexts */
2606                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2607                 if (IS_ERR(context)) {
2608                         rc = PTR_ERR(context);
2609                         goto err_out1;
2610                 } else if (context) {
2611                         ea_buf = (struct create_ea_buf_req *)context;
2612                         if (le16_to_cpu(context->DataOffset) +
2613                             le32_to_cpu(context->DataLength) <
2614                             sizeof(struct create_ea_buf_req)) {
2615                                 rc = -EINVAL;
2616                                 goto err_out1;
2617                         }
2618                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2619                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2620                                 rc = -EACCES;
2621                                 goto err_out1;
2622                         }
2623                 }
2624
2625                 context = smb2_find_context_vals(req,
2626                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2627                 if (IS_ERR(context)) {
2628                         rc = PTR_ERR(context);
2629                         goto err_out1;
2630                 } else if (context) {
2631                         ksmbd_debug(SMB,
2632                                     "get query maximal access context\n");
2633                         maximal_access_ctxt = 1;
2634                 }
2635
2636                 context = smb2_find_context_vals(req,
2637                                                  SMB2_CREATE_TIMEWARP_REQUEST);
2638                 if (IS_ERR(context)) {
2639                         rc = PTR_ERR(context);
2640                         goto err_out1;
2641                 } else if (context) {
2642                         ksmbd_debug(SMB, "get timewarp context\n");
2643                         rc = -EBADF;
2644                         goto err_out1;
2645                 }
2646
2647                 if (tcon->posix_extensions) {
2648                         context = smb2_find_context_vals(req,
2649                                                          SMB2_CREATE_TAG_POSIX);
2650                         if (IS_ERR(context)) {
2651                                 rc = PTR_ERR(context);
2652                                 goto err_out1;
2653                         } else if (context) {
2654                                 struct create_posix *posix =
2655                                         (struct create_posix *)context;
2656                                 if (le16_to_cpu(context->DataOffset) +
2657                                     le32_to_cpu(context->DataLength) <
2658                                     sizeof(struct create_posix)) {
2659                                         rc = -EINVAL;
2660                                         goto err_out1;
2661                                 }
2662                                 ksmbd_debug(SMB, "get posix context\n");
2663
2664                                 posix_mode = le32_to_cpu(posix->Mode);
2665                                 posix_ctxt = 1;
2666                         }
2667                 }
2668         }
2669
2670         if (ksmbd_override_fsids(work)) {
2671                 rc = -ENOMEM;
2672                 goto err_out1;
2673         }
2674
2675         rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2676         if (!rc) {
2677                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2678                         /*
2679                          * If file exists with under flags, return access
2680                          * denied error.
2681                          */
2682                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2683                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2684                                 rc = -EACCES;
2685                                 path_put(&path);
2686                                 goto err_out;
2687                         }
2688
2689                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2690                                 ksmbd_debug(SMB,
2691                                             "User does not have write permission\n");
2692                                 rc = -EACCES;
2693                                 path_put(&path);
2694                                 goto err_out;
2695                         }
2696                 } else if (d_is_symlink(path.dentry)) {
2697                         rc = -EACCES;
2698                         path_put(&path);
2699                         goto err_out;
2700                 }
2701         }
2702
2703         if (rc) {
2704                 if (rc != -ENOENT)
2705                         goto err_out;
2706                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2707                             name, rc);
2708                 rc = 0;
2709         } else {
2710                 file_present = true;
2711                 user_ns = mnt_user_ns(path.mnt);
2712                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
2713         }
2714         if (stream_name) {
2715                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2716                         if (s_type == DATA_STREAM) {
2717                                 rc = -EIO;
2718                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2719                         }
2720                 } else {
2721                         if (S_ISDIR(stat.mode) && s_type == DATA_STREAM) {
2722                                 rc = -EIO;
2723                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2724                         }
2725                 }
2726
2727                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2728                     req->FileAttributes & ATTR_NORMAL_LE) {
2729                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2730                         rc = -EIO;
2731                 }
2732
2733                 if (rc < 0)
2734                         goto err_out;
2735         }
2736
2737         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2738             S_ISDIR(stat.mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2739                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2740                             name, req->CreateOptions);
2741                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2742                 rc = -EIO;
2743                 goto err_out;
2744         }
2745
2746         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2747             !(req->CreateDisposition == FILE_CREATE_LE) &&
2748             !S_ISDIR(stat.mode)) {
2749                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2750                 rc = -EIO;
2751                 goto err_out;
2752         }
2753
2754         if (!stream_name && file_present &&
2755             req->CreateDisposition == FILE_CREATE_LE) {
2756                 rc = -EEXIST;
2757                 goto err_out;
2758         }
2759
2760         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2761
2762         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2763                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2764                                          sess->user->uid);
2765                 if (rc)
2766                         goto err_out;
2767         }
2768
2769         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2770                 if (!file_present) {
2771                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2772                 } else {
2773                         rc = ksmbd_vfs_query_maximal_access(user_ns,
2774                                                             path.dentry,
2775                                                             &daccess);
2776                         if (rc)
2777                                 goto err_out;
2778                         already_permitted = true;
2779                 }
2780                 maximal_access = daccess;
2781         }
2782
2783         open_flags = smb2_create_open_flags(file_present, daccess,
2784                                             req->CreateDisposition,
2785                                             &may_flags);
2786
2787         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2788                 if (open_flags & O_CREAT) {
2789                         ksmbd_debug(SMB,
2790                                     "User does not have write permission\n");
2791                         rc = -EACCES;
2792                         goto err_out;
2793                 }
2794         }
2795
2796         /*create file if not present */
2797         if (!file_present) {
2798                 rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2799                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2800                 if (rc) {
2801                         if (rc == -ENOENT) {
2802                                 rc = -EIO;
2803                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2804                         }
2805                         goto err_out;
2806                 }
2807
2808                 created = true;
2809                 user_ns = mnt_user_ns(path.mnt);
2810                 if (ea_buf) {
2811                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2812                             sizeof(struct smb2_ea_info)) {
2813                                 rc = -EINVAL;
2814                                 goto err_out;
2815                         }
2816
2817                         rc = smb2_set_ea(&ea_buf->ea,
2818                                          le32_to_cpu(ea_buf->ccontext.DataLength),
2819                                          &path);
2820                         if (rc == -EOPNOTSUPP)
2821                                 rc = 0;
2822                         else if (rc)
2823                                 goto err_out;
2824                 }
2825         } else if (!already_permitted) {
2826                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2827                  * because execute(search) permission on a parent directory,
2828                  * is already granted.
2829                  */
2830                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2831                         rc = inode_permission(user_ns,
2832                                               d_inode(path.dentry),
2833                                               may_flags);
2834                         if (rc)
2835                                 goto err_out;
2836
2837                         if ((daccess & FILE_DELETE_LE) ||
2838                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2839                                 rc = ksmbd_vfs_may_delete(user_ns,
2840                                                           path.dentry);
2841                                 if (rc)
2842                                         goto err_out;
2843                         }
2844                 }
2845         }
2846
2847         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2848         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2849                 rc = -EBUSY;
2850                 goto err_out;
2851         }
2852
2853         rc = 0;
2854         filp = dentry_open(&path, open_flags, current_cred());
2855         if (IS_ERR(filp)) {
2856                 rc = PTR_ERR(filp);
2857                 pr_err("dentry open for dir failed, rc %d\n", rc);
2858                 goto err_out;
2859         }
2860
2861         if (file_present) {
2862                 if (!(open_flags & O_TRUNC))
2863                         file_info = FILE_OPENED;
2864                 else
2865                         file_info = FILE_OVERWRITTEN;
2866
2867                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2868                     FILE_SUPERSEDE_LE)
2869                         file_info = FILE_SUPERSEDED;
2870         } else if (open_flags & O_CREAT) {
2871                 file_info = FILE_CREATED;
2872         }
2873
2874         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2875
2876         /* Obtain Volatile-ID */
2877         fp = ksmbd_open_fd(work, filp);
2878         if (IS_ERR(fp)) {
2879                 fput(filp);
2880                 rc = PTR_ERR(fp);
2881                 fp = NULL;
2882                 goto err_out;
2883         }
2884
2885         /* Get Persistent-ID */
2886         ksmbd_open_durable_fd(fp);
2887         if (!has_file_id(fp->persistent_id)) {
2888                 rc = -ENOMEM;
2889                 goto err_out;
2890         }
2891
2892         fp->filename = name;
2893         fp->cdoption = req->CreateDisposition;
2894         fp->daccess = daccess;
2895         fp->saccess = req->ShareAccess;
2896         fp->coption = req->CreateOptions;
2897
2898         /* Set default windows and posix acls if creating new file */
2899         if (created) {
2900                 int posix_acl_rc;
2901                 struct inode *inode = d_inode(path.dentry);
2902
2903                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2904                                                            inode,
2905                                                            d_inode(path.dentry->d_parent));
2906                 if (posix_acl_rc)
2907                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2908
2909                 if (test_share_config_flag(work->tcon->share_conf,
2910                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2911                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2912                                               sess->user->gid);
2913                 }
2914
2915                 if (rc) {
2916                         rc = smb2_create_sd_buffer(work, req, &path);
2917                         if (rc) {
2918                                 if (posix_acl_rc)
2919                                         ksmbd_vfs_set_init_posix_acl(user_ns,
2920                                                                      inode);
2921
2922                                 if (test_share_config_flag(work->tcon->share_conf,
2923                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2924                                         struct smb_fattr fattr;
2925                                         struct smb_ntsd *pntsd;
2926                                         int pntsd_size, ace_num = 0;
2927
2928                                         ksmbd_acls_fattr(&fattr, user_ns, inode);
2929                                         if (fattr.cf_acls)
2930                                                 ace_num = fattr.cf_acls->a_count;
2931                                         if (fattr.cf_dacls)
2932                                                 ace_num += fattr.cf_dacls->a_count;
2933
2934                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
2935                                                         sizeof(struct smb_sid) * 3 +
2936                                                         sizeof(struct smb_acl) +
2937                                                         sizeof(struct smb_ace) * ace_num * 2,
2938                                                         GFP_KERNEL);
2939                                         if (!pntsd)
2940                                                 goto err_out;
2941
2942                                         rc = build_sec_desc(user_ns,
2943                                                             pntsd, NULL,
2944                                                             OWNER_SECINFO |
2945                                                             GROUP_SECINFO |
2946                                                             DACL_SECINFO,
2947                                                             &pntsd_size, &fattr);
2948                                         posix_acl_release(fattr.cf_acls);
2949                                         posix_acl_release(fattr.cf_dacls);
2950
2951                                         rc = ksmbd_vfs_set_sd_xattr(conn,
2952                                                                     user_ns,
2953                                                                     path.dentry,
2954                                                                     pntsd,
2955                                                                     pntsd_size);
2956                                         kfree(pntsd);
2957                                         if (rc)
2958                                                 pr_err("failed to store ntacl in xattr : %d\n",
2959                                                        rc);
2960                                 }
2961                         }
2962                 }
2963                 rc = 0;
2964         }
2965
2966         if (stream_name) {
2967                 rc = smb2_set_stream_name_xattr(&path,
2968                                                 fp,
2969                                                 stream_name,
2970                                                 s_type);
2971                 if (rc)
2972                         goto err_out;
2973                 file_info = FILE_CREATED;
2974         }
2975
2976         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
2977                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
2978         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
2979             !fp->attrib_only && !stream_name) {
2980                 smb_break_all_oplock(work, fp);
2981                 need_truncate = 1;
2982         }
2983
2984         /* fp should be searchable through ksmbd_inode.m_fp_list
2985          * after daccess, saccess, attrib_only, and stream are
2986          * initialized.
2987          */
2988         write_lock(&fp->f_ci->m_lock);
2989         list_add(&fp->node, &fp->f_ci->m_fp_list);
2990         write_unlock(&fp->f_ci->m_lock);
2991
2992         rc = ksmbd_vfs_getattr(&path, &stat);
2993         if (rc) {
2994                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
2995                 rc = 0;
2996         }
2997
2998         /* Check delete pending among previous fp before oplock break */
2999         if (ksmbd_inode_pending_delete(fp)) {
3000                 rc = -EBUSY;
3001                 goto err_out;
3002         }
3003
3004         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3005         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3006             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3007              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3008                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3009                         rc = share_ret;
3010                         goto err_out;
3011                 }
3012         } else {
3013                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3014                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3015                         ksmbd_debug(SMB,
3016                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3017                                     name, req_op_level, lc->req_state);
3018                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3019                         if (rc)
3020                                 goto err_out;
3021                 } else if (open_flags == O_RDONLY &&
3022                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3023                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3024                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3025
3026                 rc = smb_grant_oplock(work, req_op_level,
3027                                       fp->persistent_id, fp,
3028                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3029                                       lc, share_ret);
3030                 if (rc < 0)
3031                         goto err_out;
3032         }
3033
3034         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3035                 ksmbd_fd_set_delete_on_close(fp, file_info);
3036
3037         if (need_truncate) {
3038                 rc = smb2_create_truncate(&path);
3039                 if (rc)
3040                         goto err_out;
3041         }
3042
3043         if (req->CreateContextsOffset) {
3044                 struct create_alloc_size_req *az_req;
3045
3046                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3047                                         SMB2_CREATE_ALLOCATION_SIZE);
3048                 if (IS_ERR(az_req)) {
3049                         rc = PTR_ERR(az_req);
3050                         goto err_out;
3051                 } else if (az_req) {
3052                         loff_t alloc_size;
3053                         int err;
3054
3055                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3056                             le32_to_cpu(az_req->ccontext.DataLength) <
3057                             sizeof(struct create_alloc_size_req)) {
3058                                 rc = -EINVAL;
3059                                 goto err_out;
3060                         }
3061                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3062                         ksmbd_debug(SMB,
3063                                     "request smb2 create allocate size : %llu\n",
3064                                     alloc_size);
3065                         smb_break_all_levII_oplock(work, fp, 1);
3066                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3067                                             alloc_size);
3068                         if (err < 0)
3069                                 ksmbd_debug(SMB,
3070                                             "vfs_fallocate is failed : %d\n",
3071                                             err);
3072                 }
3073
3074                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3075                 if (IS_ERR(context)) {
3076                         rc = PTR_ERR(context);
3077                         goto err_out;
3078                 } else if (context) {
3079                         ksmbd_debug(SMB, "get query on disk id context\n");
3080                         query_disk_id = 1;
3081                 }
3082         }
3083
3084         if (stat.result_mask & STATX_BTIME)
3085                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3086         else
3087                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3088         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3089                 fp->f_ci->m_fattr =
3090                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3091
3092         if (!created)
3093                 smb2_update_xattrs(tcon, &path, fp);
3094         else
3095                 smb2_new_xattrs(tcon, &path, fp);
3096
3097         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3098
3099         generic_fillattr(user_ns, file_inode(fp->filp),
3100                          &stat);
3101
3102         rsp->StructureSize = cpu_to_le16(89);
3103         rcu_read_lock();
3104         opinfo = rcu_dereference(fp->f_opinfo);
3105         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3106         rcu_read_unlock();
3107         rsp->Reserved = 0;
3108         rsp->CreateAction = cpu_to_le32(file_info);
3109         rsp->CreationTime = cpu_to_le64(fp->create_time);
3110         time = ksmbd_UnixTimeToNT(stat.atime);
3111         rsp->LastAccessTime = cpu_to_le64(time);
3112         time = ksmbd_UnixTimeToNT(stat.mtime);
3113         rsp->LastWriteTime = cpu_to_le64(time);
3114         time = ksmbd_UnixTimeToNT(stat.ctime);
3115         rsp->ChangeTime = cpu_to_le64(time);
3116         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3117                 cpu_to_le64(stat.blocks << 9);
3118         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3119         rsp->FileAttributes = fp->f_ci->m_fattr;
3120
3121         rsp->Reserved2 = 0;
3122
3123         rsp->PersistentFileId = cpu_to_le64(fp->persistent_id);
3124         rsp->VolatileFileId = cpu_to_le64(fp->volatile_id);
3125
3126         rsp->CreateContextsOffset = 0;
3127         rsp->CreateContextsLength = 0;
3128         inc_rfc1001_len(rsp_org, 88); /* StructureSize - 1*/
3129
3130         /* If lease is request send lease context response */
3131         if (opinfo && opinfo->is_lease) {
3132                 struct create_context *lease_ccontext;
3133
3134                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3135                             name, opinfo->o_lease->state);
3136                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3137
3138                 lease_ccontext = (struct create_context *)rsp->Buffer;
3139                 contxt_cnt++;
3140                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3141                 le32_add_cpu(&rsp->CreateContextsLength,
3142                              conn->vals->create_lease_size);
3143                 inc_rfc1001_len(rsp_org, conn->vals->create_lease_size);
3144                 next_ptr = &lease_ccontext->Next;
3145                 next_off = conn->vals->create_lease_size;
3146         }
3147
3148         if (maximal_access_ctxt) {
3149                 struct create_context *mxac_ccontext;
3150
3151                 if (maximal_access == 0)
3152                         ksmbd_vfs_query_maximal_access(user_ns,
3153                                                        path.dentry,
3154                                                        &maximal_access);
3155                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3156                                 le32_to_cpu(rsp->CreateContextsLength));
3157                 contxt_cnt++;
3158                 create_mxac_rsp_buf(rsp->Buffer +
3159                                 le32_to_cpu(rsp->CreateContextsLength),
3160                                 le32_to_cpu(maximal_access));
3161                 le32_add_cpu(&rsp->CreateContextsLength,
3162                              conn->vals->create_mxac_size);
3163                 inc_rfc1001_len(rsp_org, conn->vals->create_mxac_size);
3164                 if (next_ptr)
3165                         *next_ptr = cpu_to_le32(next_off);
3166                 next_ptr = &mxac_ccontext->Next;
3167                 next_off = conn->vals->create_mxac_size;
3168         }
3169
3170         if (query_disk_id) {
3171                 struct create_context *disk_id_ccontext;
3172
3173                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3174                                 le32_to_cpu(rsp->CreateContextsLength));
3175                 contxt_cnt++;
3176                 create_disk_id_rsp_buf(rsp->Buffer +
3177                                 le32_to_cpu(rsp->CreateContextsLength),
3178                                 stat.ino, tcon->id);
3179                 le32_add_cpu(&rsp->CreateContextsLength,
3180                              conn->vals->create_disk_id_size);
3181                 inc_rfc1001_len(rsp_org, conn->vals->create_disk_id_size);
3182                 if (next_ptr)
3183                         *next_ptr = cpu_to_le32(next_off);
3184                 next_ptr = &disk_id_ccontext->Next;
3185                 next_off = conn->vals->create_disk_id_size;
3186         }
3187
3188         if (posix_ctxt) {
3189                 contxt_cnt++;
3190                 create_posix_rsp_buf(rsp->Buffer +
3191                                 le32_to_cpu(rsp->CreateContextsLength),
3192                                 fp);
3193                 le32_add_cpu(&rsp->CreateContextsLength,
3194                              conn->vals->create_posix_size);
3195                 inc_rfc1001_len(rsp_org, conn->vals->create_posix_size);
3196                 if (next_ptr)
3197                         *next_ptr = cpu_to_le32(next_off);
3198         }
3199
3200         if (contxt_cnt > 0) {
3201                 rsp->CreateContextsOffset =
3202                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)
3203                         - 4);
3204         }
3205
3206 err_out:
3207         if (file_present || created)
3208                 path_put(&path);
3209         ksmbd_revert_fsids(work);
3210 err_out1:
3211         if (rc) {
3212                 if (rc == -EINVAL)
3213                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3214                 else if (rc == -EOPNOTSUPP)
3215                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3216                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3217                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3218                 else if (rc == -ENOENT)
3219                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3220                 else if (rc == -EPERM)
3221                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3222                 else if (rc == -EBUSY)
3223                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3224                 else if (rc == -EBADF)
3225                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3226                 else if (rc == -ENOEXEC)
3227                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3228                 else if (rc == -ENXIO)
3229                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3230                 else if (rc == -EEXIST)
3231                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3232                 else if (rc == -EMFILE)
3233                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3234                 if (!rsp->hdr.Status)
3235                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3236
3237                 if (!fp || !fp->filename)
3238                         kfree(name);
3239                 if (fp)
3240                         ksmbd_fd_put(work, fp);
3241                 smb2_set_err_rsp(work);
3242                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3243         }
3244
3245         kfree(lc);
3246
3247         return 0;
3248 }
3249
3250 static int readdir_info_level_struct_sz(int info_level)
3251 {
3252         switch (info_level) {
3253         case FILE_FULL_DIRECTORY_INFORMATION:
3254                 return sizeof(struct file_full_directory_info);
3255         case FILE_BOTH_DIRECTORY_INFORMATION:
3256                 return sizeof(struct file_both_directory_info);
3257         case FILE_DIRECTORY_INFORMATION:
3258                 return sizeof(struct file_directory_info);
3259         case FILE_NAMES_INFORMATION:
3260                 return sizeof(struct file_names_info);
3261         case FILEID_FULL_DIRECTORY_INFORMATION:
3262                 return sizeof(struct file_id_full_dir_info);
3263         case FILEID_BOTH_DIRECTORY_INFORMATION:
3264                 return sizeof(struct file_id_both_directory_info);
3265         case SMB_FIND_FILE_POSIX_INFO:
3266                 return sizeof(struct smb2_posix_info);
3267         default:
3268                 return -EOPNOTSUPP;
3269         }
3270 }
3271
3272 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3273 {
3274         switch (info_level) {
3275         case FILE_FULL_DIRECTORY_INFORMATION:
3276         {
3277                 struct file_full_directory_info *ffdinfo;
3278
3279                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3280                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3281                 d_info->name = ffdinfo->FileName;
3282                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3283                 return 0;
3284         }
3285         case FILE_BOTH_DIRECTORY_INFORMATION:
3286         {
3287                 struct file_both_directory_info *fbdinfo;
3288
3289                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3290                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3291                 d_info->name = fbdinfo->FileName;
3292                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3293                 return 0;
3294         }
3295         case FILE_DIRECTORY_INFORMATION:
3296         {
3297                 struct file_directory_info *fdinfo;
3298
3299                 fdinfo = (struct file_directory_info *)d_info->rptr;
3300                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3301                 d_info->name = fdinfo->FileName;
3302                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3303                 return 0;
3304         }
3305         case FILE_NAMES_INFORMATION:
3306         {
3307                 struct file_names_info *fninfo;
3308
3309                 fninfo = (struct file_names_info *)d_info->rptr;
3310                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3311                 d_info->name = fninfo->FileName;
3312                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3313                 return 0;
3314         }
3315         case FILEID_FULL_DIRECTORY_INFORMATION:
3316         {
3317                 struct file_id_full_dir_info *dinfo;
3318
3319                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3320                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3321                 d_info->name = dinfo->FileName;
3322                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3323                 return 0;
3324         }
3325         case FILEID_BOTH_DIRECTORY_INFORMATION:
3326         {
3327                 struct file_id_both_directory_info *fibdinfo;
3328
3329                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3330                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3331                 d_info->name = fibdinfo->FileName;
3332                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3333                 return 0;
3334         }
3335         case SMB_FIND_FILE_POSIX_INFO:
3336         {
3337                 struct smb2_posix_info *posix_info;
3338
3339                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3340                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3341                 d_info->name = posix_info->name;
3342                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3343                 return 0;
3344         }
3345         default:
3346                 return -EINVAL;
3347         }
3348 }
3349
3350 /**
3351  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3352  * buffer
3353  * @conn:       connection instance
3354  * @info_level: smb information level
3355  * @d_info:     structure included variables for query dir
3356  * @user_ns:    user namespace
3357  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3358  *
3359  * if directory has many entries, find first can't read it fully.
3360  * find next might be called multiple times to read remaining dir entries
3361  *
3362  * Return:      0 on success, otherwise error
3363  */
3364 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3365                                        struct ksmbd_dir_info *d_info,
3366                                        struct ksmbd_kstat *ksmbd_kstat)
3367 {
3368         int next_entry_offset = 0;
3369         char *conv_name;
3370         int conv_len;
3371         void *kstat;
3372         int struct_sz, rc = 0;
3373
3374         conv_name = ksmbd_convert_dir_info_name(d_info,
3375                                                 conn->local_nls,
3376                                                 &conv_len);
3377         if (!conv_name)
3378                 return -ENOMEM;
3379
3380         /* Somehow the name has only terminating NULL bytes */
3381         if (conv_len < 0) {
3382                 rc = -EINVAL;
3383                 goto free_conv_name;
3384         }
3385
3386         struct_sz = readdir_info_level_struct_sz(info_level);
3387         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3388                                   KSMBD_DIR_INFO_ALIGNMENT);
3389
3390         if (next_entry_offset > d_info->out_buf_len) {
3391                 d_info->out_buf_len = 0;
3392                 rc = -ENOSPC;
3393                 goto free_conv_name;
3394         }
3395
3396         kstat = d_info->wptr;
3397         if (info_level != FILE_NAMES_INFORMATION)
3398                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3399
3400         switch (info_level) {
3401         case FILE_FULL_DIRECTORY_INFORMATION:
3402         {
3403                 struct file_full_directory_info *ffdinfo;
3404
3405                 ffdinfo = (struct file_full_directory_info *)kstat;
3406                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3407                 ffdinfo->EaSize =
3408                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3409                 if (ffdinfo->EaSize)
3410                         ffdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3411                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3412                         ffdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3413                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3414                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3415                 break;
3416         }
3417         case FILE_BOTH_DIRECTORY_INFORMATION:
3418         {
3419                 struct file_both_directory_info *fbdinfo;
3420
3421                 fbdinfo = (struct file_both_directory_info *)kstat;
3422                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3423                 fbdinfo->EaSize =
3424                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3425                 if (fbdinfo->EaSize)
3426                         fbdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3427                 fbdinfo->ShortNameLength = 0;
3428                 fbdinfo->Reserved = 0;
3429                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3430                         fbdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3431                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3432                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3433                 break;
3434         }
3435         case FILE_DIRECTORY_INFORMATION:
3436         {
3437                 struct file_directory_info *fdinfo;
3438
3439                 fdinfo = (struct file_directory_info *)kstat;
3440                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3441                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3442                         fdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3443                 memcpy(fdinfo->FileName, conv_name, conv_len);
3444                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3445                 break;
3446         }
3447         case FILE_NAMES_INFORMATION:
3448         {
3449                 struct file_names_info *fninfo;
3450
3451                 fninfo = (struct file_names_info *)kstat;
3452                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3453                 memcpy(fninfo->FileName, conv_name, conv_len);
3454                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3455                 break;
3456         }
3457         case FILEID_FULL_DIRECTORY_INFORMATION:
3458         {
3459                 struct file_id_full_dir_info *dinfo;
3460
3461                 dinfo = (struct file_id_full_dir_info *)kstat;
3462                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3463                 dinfo->EaSize =
3464                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3465                 if (dinfo->EaSize)
3466                         dinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3467                 dinfo->Reserved = 0;
3468                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3469                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3470                         dinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3471                 memcpy(dinfo->FileName, conv_name, conv_len);
3472                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3473                 break;
3474         }
3475         case FILEID_BOTH_DIRECTORY_INFORMATION:
3476         {
3477                 struct file_id_both_directory_info *fibdinfo;
3478
3479                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3480                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3481                 fibdinfo->EaSize =
3482                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3483                 if (fibdinfo->EaSize)
3484                         fibdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3485                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3486                 fibdinfo->ShortNameLength = 0;
3487                 fibdinfo->Reserved = 0;
3488                 fibdinfo->Reserved2 = cpu_to_le16(0);
3489                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3490                         fibdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3491                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3492                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3493                 break;
3494         }
3495         case SMB_FIND_FILE_POSIX_INFO:
3496         {
3497                 struct smb2_posix_info *posix_info;
3498                 u64 time;
3499
3500                 posix_info = (struct smb2_posix_info *)kstat;
3501                 posix_info->Ignored = 0;
3502                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3503                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3504                 posix_info->ChangeTime = cpu_to_le64(time);
3505                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3506                 posix_info->LastAccessTime = cpu_to_le64(time);
3507                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3508                 posix_info->LastWriteTime = cpu_to_le64(time);
3509                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3510                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3511                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3512                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3513                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode);
3514                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3515                 posix_info->DosAttributes =
3516                         S_ISDIR(ksmbd_kstat->kstat->mode) ? ATTR_DIRECTORY_LE : ATTR_ARCHIVE_LE;
3517                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3518                         posix_info->DosAttributes |= ATTR_HIDDEN_LE;
3519                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3520                           SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3521                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3522                           SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);
3523                 memcpy(posix_info->name, conv_name, conv_len);
3524                 posix_info->name_len = cpu_to_le32(conv_len);
3525                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3526                 break;
3527         }
3528
3529         } /* switch (info_level) */
3530
3531         d_info->last_entry_offset = d_info->data_count;
3532         d_info->data_count += next_entry_offset;
3533         d_info->out_buf_len -= next_entry_offset;
3534         d_info->wptr += next_entry_offset;
3535
3536         ksmbd_debug(SMB,
3537                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3538                     info_level, d_info->out_buf_len,
3539                     next_entry_offset, d_info->data_count);
3540
3541 free_conv_name:
3542         kfree(conv_name);
3543         return rc;
3544 }
3545
3546 struct smb2_query_dir_private {
3547         struct ksmbd_work       *work;
3548         char                    *search_pattern;
3549         struct ksmbd_file       *dir_fp;
3550
3551         struct ksmbd_dir_info   *d_info;
3552         int                     info_level;
3553 };
3554
3555 static void lock_dir(struct ksmbd_file *dir_fp)
3556 {
3557         struct dentry *dir = dir_fp->filp->f_path.dentry;
3558
3559         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3560 }
3561
3562 static void unlock_dir(struct ksmbd_file *dir_fp)
3563 {
3564         struct dentry *dir = dir_fp->filp->f_path.dentry;
3565
3566         inode_unlock(d_inode(dir));
3567 }
3568
3569 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3570 {
3571         struct user_namespace   *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3572         struct kstat            kstat;
3573         struct ksmbd_kstat      ksmbd_kstat;
3574         int                     rc;
3575         int                     i;
3576
3577         for (i = 0; i < priv->d_info->num_entry; i++) {
3578                 struct dentry *dent;
3579
3580                 if (dentry_name(priv->d_info, priv->info_level))
3581                         return -EINVAL;
3582
3583                 lock_dir(priv->dir_fp);
3584                 dent = lookup_one(user_ns, priv->d_info->name,
3585                                   priv->dir_fp->filp->f_path.dentry,
3586                                   priv->d_info->name_len);
3587                 unlock_dir(priv->dir_fp);
3588
3589                 if (IS_ERR(dent)) {
3590                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3591                                     priv->d_info->name,
3592                                     PTR_ERR(dent));
3593                         continue;
3594                 }
3595                 if (unlikely(d_is_negative(dent))) {
3596                         dput(dent);
3597                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3598                                     priv->d_info->name);
3599                         continue;
3600                 }
3601
3602                 ksmbd_kstat.kstat = &kstat;
3603                 if (priv->info_level != FILE_NAMES_INFORMATION)
3604                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3605                                                     user_ns,
3606                                                     dent,
3607                                                     &ksmbd_kstat);
3608
3609                 rc = smb2_populate_readdir_entry(priv->work->conn,
3610                                                  priv->info_level,
3611                                                  priv->d_info,
3612                                                  &ksmbd_kstat);
3613                 dput(dent);
3614                 if (rc)
3615                         return rc;
3616         }
3617         return 0;
3618 }
3619
3620 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3621                                    int info_level)
3622 {
3623         int struct_sz;
3624         int conv_len;
3625         int next_entry_offset;
3626
3627         struct_sz = readdir_info_level_struct_sz(info_level);
3628         if (struct_sz == -EOPNOTSUPP)
3629                 return -EOPNOTSUPP;
3630
3631         conv_len = (d_info->name_len + 1) * 2;
3632         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3633                                   KSMBD_DIR_INFO_ALIGNMENT);
3634
3635         if (next_entry_offset > d_info->out_buf_len) {
3636                 d_info->out_buf_len = 0;
3637                 return -ENOSPC;
3638         }
3639
3640         switch (info_level) {
3641         case FILE_FULL_DIRECTORY_INFORMATION:
3642         {
3643                 struct file_full_directory_info *ffdinfo;
3644
3645                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3646                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3647                 ffdinfo->FileName[d_info->name_len] = 0x00;
3648                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3649                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3650                 break;
3651         }
3652         case FILE_BOTH_DIRECTORY_INFORMATION:
3653         {
3654                 struct file_both_directory_info *fbdinfo;
3655
3656                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3657                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3658                 fbdinfo->FileName[d_info->name_len] = 0x00;
3659                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3660                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3661                 break;
3662         }
3663         case FILE_DIRECTORY_INFORMATION:
3664         {
3665                 struct file_directory_info *fdinfo;
3666
3667                 fdinfo = (struct file_directory_info *)d_info->wptr;
3668                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3669                 fdinfo->FileName[d_info->name_len] = 0x00;
3670                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3671                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3672                 break;
3673         }
3674         case FILE_NAMES_INFORMATION:
3675         {
3676                 struct file_names_info *fninfo;
3677
3678                 fninfo = (struct file_names_info *)d_info->wptr;
3679                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3680                 fninfo->FileName[d_info->name_len] = 0x00;
3681                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3682                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3683                 break;
3684         }
3685         case FILEID_FULL_DIRECTORY_INFORMATION:
3686         {
3687                 struct file_id_full_dir_info *dinfo;
3688
3689                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3690                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3691                 dinfo->FileName[d_info->name_len] = 0x00;
3692                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3693                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3694                 break;
3695         }
3696         case FILEID_BOTH_DIRECTORY_INFORMATION:
3697         {
3698                 struct file_id_both_directory_info *fibdinfo;
3699
3700                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3701                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3702                 fibdinfo->FileName[d_info->name_len] = 0x00;
3703                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3704                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3705                 break;
3706         }
3707         case SMB_FIND_FILE_POSIX_INFO:
3708         {
3709                 struct smb2_posix_info *posix_info;
3710
3711                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3712                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3713                 posix_info->name[d_info->name_len] = 0x00;
3714                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3715                 posix_info->NextEntryOffset =
3716                         cpu_to_le32(next_entry_offset);
3717                 break;
3718         }
3719         } /* switch (info_level) */
3720
3721         d_info->num_entry++;
3722         d_info->out_buf_len -= next_entry_offset;
3723         d_info->wptr += next_entry_offset;
3724         return 0;
3725 }
3726
3727 static int __query_dir(struct dir_context *ctx, const char *name, int namlen,
3728                        loff_t offset, u64 ino, unsigned int d_type)
3729 {
3730         struct ksmbd_readdir_data       *buf;
3731         struct smb2_query_dir_private   *priv;
3732         struct ksmbd_dir_info           *d_info;
3733         int                             rc;
3734
3735         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3736         priv    = buf->private;
3737         d_info  = priv->d_info;
3738
3739         /* dot and dotdot entries are already reserved */
3740         if (!strcmp(".", name) || !strcmp("..", name))
3741                 return 0;
3742         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3743                 return 0;
3744         if (!match_pattern(name, namlen, priv->search_pattern))
3745                 return 0;
3746
3747         d_info->name            = name;
3748         d_info->name_len        = namlen;
3749         rc = reserve_populate_dentry(d_info, priv->info_level);
3750         if (rc)
3751                 return rc;
3752         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) {
3753                 d_info->out_buf_len = 0;
3754                 return 0;
3755         }
3756         return 0;
3757 }
3758
3759 static void restart_ctx(struct dir_context *ctx)
3760 {
3761         ctx->pos = 0;
3762 }
3763
3764 static int verify_info_level(int info_level)
3765 {
3766         switch (info_level) {
3767         case FILE_FULL_DIRECTORY_INFORMATION:
3768         case FILE_BOTH_DIRECTORY_INFORMATION:
3769         case FILE_DIRECTORY_INFORMATION:
3770         case FILE_NAMES_INFORMATION:
3771         case FILEID_FULL_DIRECTORY_INFORMATION:
3772         case FILEID_BOTH_DIRECTORY_INFORMATION:
3773         case SMB_FIND_FILE_POSIX_INFO:
3774                 break;
3775         default:
3776                 return -EOPNOTSUPP;
3777         }
3778
3779         return 0;
3780 }
3781
3782 int smb2_query_dir(struct ksmbd_work *work)
3783 {
3784         struct ksmbd_conn *conn = work->conn;
3785         struct smb2_query_directory_req *req;
3786         struct smb2_query_directory_rsp *rsp, *rsp_org;
3787         struct ksmbd_share_config *share = work->tcon->share_conf;
3788         struct ksmbd_file *dir_fp = NULL;
3789         struct ksmbd_dir_info d_info;
3790         int rc = 0;
3791         char *srch_ptr = NULL;
3792         unsigned char srch_flag;
3793         int buffer_sz;
3794         struct smb2_query_dir_private query_dir_private = {NULL, };
3795
3796         rsp_org = work->response_buf;
3797         WORK_BUFFERS(work, req, rsp);
3798
3799         if (ksmbd_override_fsids(work)) {
3800                 rsp->hdr.Status = STATUS_NO_MEMORY;
3801                 smb2_set_err_rsp(work);
3802                 return -ENOMEM;
3803         }
3804
3805         rc = verify_info_level(req->FileInformationClass);
3806         if (rc) {
3807                 rc = -EFAULT;
3808                 goto err_out2;
3809         }
3810
3811         dir_fp = ksmbd_lookup_fd_slow(work,
3812                                       le64_to_cpu(req->VolatileFileId),
3813                                       le64_to_cpu(req->PersistentFileId));
3814         if (!dir_fp) {
3815                 rc = -EBADF;
3816                 goto err_out2;
3817         }
3818
3819         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3820             inode_permission(file_mnt_user_ns(dir_fp->filp),
3821                              file_inode(dir_fp->filp),
3822                              MAY_READ | MAY_EXEC)) {
3823                 pr_err("no right to enumerate directory (%pd)\n",
3824                        dir_fp->filp->f_path.dentry);
3825                 rc = -EACCES;
3826                 goto err_out2;
3827         }
3828
3829         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3830                 pr_err("can't do query dir for a file\n");
3831                 rc = -EINVAL;
3832                 goto err_out2;
3833         }
3834
3835         srch_flag = req->Flags;
3836         srch_ptr = smb_strndup_from_utf16(req->Buffer,
3837                                           le16_to_cpu(req->FileNameLength), 1,
3838                                           conn->local_nls);
3839         if (IS_ERR(srch_ptr)) {
3840                 ksmbd_debug(SMB, "Search Pattern not found\n");
3841                 rc = -EINVAL;
3842                 goto err_out2;
3843         } else {
3844                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3845         }
3846
3847         ksmbd_debug(SMB, "Directory name is %s\n", dir_fp->filename);
3848
3849         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3850                 ksmbd_debug(SMB, "Restart directory scan\n");
3851                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3852                 restart_ctx(&dir_fp->readdir_data.ctx);
3853         }
3854
3855         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3856         d_info.wptr = (char *)rsp->Buffer;
3857         d_info.rptr = (char *)rsp->Buffer;
3858         d_info.out_buf_len = (work->response_sz - (get_rfc1002_len(rsp_org) + 4));
3859         d_info.out_buf_len = min_t(int, d_info.out_buf_len, le32_to_cpu(req->OutputBufferLength)) -
3860                 sizeof(struct smb2_query_directory_rsp);
3861         d_info.flags = srch_flag;
3862
3863         /*
3864          * reserve dot and dotdot entries in head of buffer
3865          * in first response
3866          */
3867         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3868                                                dir_fp, &d_info, srch_ptr,
3869                                                smb2_populate_readdir_entry);
3870         if (rc == -ENOSPC)
3871                 rc = 0;
3872         else if (rc)
3873                 goto err_out;
3874
3875         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3876                 d_info.hide_dot_file = true;
3877
3878         buffer_sz                               = d_info.out_buf_len;
3879         d_info.rptr                             = d_info.wptr;
3880         query_dir_private.work                  = work;
3881         query_dir_private.search_pattern        = srch_ptr;
3882         query_dir_private.dir_fp                = dir_fp;
3883         query_dir_private.d_info                = &d_info;
3884         query_dir_private.info_level            = req->FileInformationClass;
3885         dir_fp->readdir_data.private            = &query_dir_private;
3886         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3887
3888         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3889         if (rc == 0)
3890                 restart_ctx(&dir_fp->readdir_data.ctx);
3891         if (rc == -ENOSPC)
3892                 rc = 0;
3893         if (rc)
3894                 goto err_out;
3895
3896         d_info.wptr = d_info.rptr;
3897         d_info.out_buf_len = buffer_sz;
3898         rc = process_query_dir_entries(&query_dir_private);
3899         if (rc)
3900                 goto err_out;
3901
3902         if (!d_info.data_count && d_info.out_buf_len >= 0) {
3903                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3904                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3905                 } else {
3906                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3907                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
3908                 }
3909                 rsp->StructureSize = cpu_to_le16(9);
3910                 rsp->OutputBufferOffset = cpu_to_le16(0);
3911                 rsp->OutputBufferLength = cpu_to_le32(0);
3912                 rsp->Buffer[0] = 0;
3913                 inc_rfc1001_len(rsp_org, 9);
3914         } else {
3915                 ((struct file_directory_info *)
3916                 ((char *)rsp->Buffer + d_info.last_entry_offset))
3917                 ->NextEntryOffset = 0;
3918
3919                 rsp->StructureSize = cpu_to_le16(9);
3920                 rsp->OutputBufferOffset = cpu_to_le16(72);
3921                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
3922                 inc_rfc1001_len(rsp_org, 8 + d_info.data_count);
3923         }
3924
3925         kfree(srch_ptr);
3926         ksmbd_fd_put(work, dir_fp);
3927         ksmbd_revert_fsids(work);
3928         return 0;
3929
3930 err_out:
3931         pr_err("error while processing smb2 query dir rc = %d\n", rc);
3932         kfree(srch_ptr);
3933
3934 err_out2:
3935         if (rc == -EINVAL)
3936                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3937         else if (rc == -EACCES)
3938                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3939         else if (rc == -ENOENT)
3940                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3941         else if (rc == -EBADF)
3942                 rsp->hdr.Status = STATUS_FILE_CLOSED;
3943         else if (rc == -ENOMEM)
3944                 rsp->hdr.Status = STATUS_NO_MEMORY;
3945         else if (rc == -EFAULT)
3946                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
3947         if (!rsp->hdr.Status)
3948                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3949
3950         smb2_set_err_rsp(work);
3951         ksmbd_fd_put(work, dir_fp);
3952         ksmbd_revert_fsids(work);
3953         return 0;
3954 }
3955
3956 /**
3957  * buffer_check_err() - helper function to check buffer errors
3958  * @reqOutputBufferLength:      max buffer length expected in command response
3959  * @rsp:                query info response buffer contains output buffer length
3960  * @infoclass_size:     query info class response buffer size
3961  *
3962  * Return:      0 on success, otherwise error
3963  */
3964 static int buffer_check_err(int reqOutputBufferLength,
3965                             struct smb2_query_info_rsp *rsp, int infoclass_size)
3966 {
3967         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
3968                 if (reqOutputBufferLength < infoclass_size) {
3969                         pr_err("Invalid Buffer Size Requested\n");
3970                         rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
3971                         rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4);
3972                         return -EINVAL;
3973                 }
3974
3975                 ksmbd_debug(SMB, "Buffer Overflow\n");
3976                 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
3977                 rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4 +
3978                                 reqOutputBufferLength);
3979                 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
3980         }
3981         return 0;
3982 }
3983
3984 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp)
3985 {
3986         struct smb2_file_standard_info *sinfo;
3987
3988         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
3989
3990         sinfo->AllocationSize = cpu_to_le64(4096);
3991         sinfo->EndOfFile = cpu_to_le64(0);
3992         sinfo->NumberOfLinks = cpu_to_le32(1);
3993         sinfo->DeletePending = 1;
3994         sinfo->Directory = 0;
3995         rsp->OutputBufferLength =
3996                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
3997         inc_rfc1001_len(rsp, sizeof(struct smb2_file_standard_info));
3998 }
3999
4000 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num)
4001 {
4002         struct smb2_file_internal_info *file_info;
4003
4004         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4005
4006         /* any unique number */
4007         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4008         rsp->OutputBufferLength =
4009                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4010         inc_rfc1001_len(rsp, sizeof(struct smb2_file_internal_info));
4011 }
4012
4013 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4014                                    struct smb2_query_info_req *req,
4015                                    struct smb2_query_info_rsp *rsp)
4016 {
4017         u64 id;
4018         int rc;
4019
4020         /*
4021          * Windows can sometime send query file info request on
4022          * pipe without opening it, checking error condition here
4023          */
4024         id = le64_to_cpu(req->VolatileFileId);
4025         if (!ksmbd_session_rpc_method(sess, id))
4026                 return -ENOENT;
4027
4028         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4029                     req->FileInfoClass, le64_to_cpu(req->VolatileFileId));
4030
4031         switch (req->FileInfoClass) {
4032         case FILE_STANDARD_INFORMATION:
4033                 get_standard_info_pipe(rsp);
4034                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4035                                       rsp, FILE_STANDARD_INFORMATION_SIZE);
4036                 break;
4037         case FILE_INTERNAL_INFORMATION:
4038                 get_internal_info_pipe(rsp, id);
4039                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4040                                       rsp, FILE_INTERNAL_INFORMATION_SIZE);
4041                 break;
4042         default:
4043                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4044                             req->FileInfoClass);
4045                 rc = -EOPNOTSUPP;
4046         }
4047         return rc;
4048 }
4049
4050 /**
4051  * smb2_get_ea() - handler for smb2 get extended attribute command
4052  * @work:       smb work containing query info command buffer
4053  * @fp:         ksmbd_file pointer
4054  * @req:        get extended attribute request
4055  * @rsp:        response buffer pointer
4056  * @rsp_org:    base response buffer pointer in case of chained response
4057  *
4058  * Return:      0 on success, otherwise error
4059  */
4060 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4061                        struct smb2_query_info_req *req,
4062                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4063 {
4064         struct smb2_ea_info *eainfo, *prev_eainfo;
4065         char *name, *ptr, *xattr_list = NULL, *buf;
4066         int rc, name_len, value_len, xattr_list_len, idx;
4067         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4068         struct smb2_ea_info_req *ea_req = NULL;
4069         struct path *path;
4070         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4071
4072         if (!(fp->daccess & FILE_READ_EA_LE)) {
4073                 pr_err("Not permitted to read ext attr : 0x%x\n",
4074                        fp->daccess);
4075                 return -EACCES;
4076         }
4077
4078         path = &fp->filp->f_path;
4079         /* single EA entry is requested with given user.* name */
4080         if (req->InputBufferLength) {
4081                 if (le32_to_cpu(req->InputBufferLength) <
4082                     sizeof(struct smb2_ea_info_req))
4083                         return -EINVAL;
4084
4085                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4086         } else {
4087                 /* need to send all EAs, if no specific EA is requested*/
4088                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4089                         ksmbd_debug(SMB,
4090                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4091                                     le32_to_cpu(req->Flags));
4092         }
4093
4094         buf_free_len = work->response_sz -
4095                         (get_rfc1002_len(rsp_org) + 4) -
4096                         sizeof(struct smb2_query_info_rsp);
4097
4098         if (le32_to_cpu(req->OutputBufferLength) < buf_free_len)
4099                 buf_free_len = le32_to_cpu(req->OutputBufferLength);
4100
4101         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4102         if (rc < 0) {
4103                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4104                 goto out;
4105         } else if (!rc) { /* there is no EA in the file */
4106                 ksmbd_debug(SMB, "no ea data in the file\n");
4107                 goto done;
4108         }
4109         xattr_list_len = rc;
4110
4111         ptr = (char *)rsp->Buffer;
4112         eainfo = (struct smb2_ea_info *)ptr;
4113         prev_eainfo = eainfo;
4114         idx = 0;
4115
4116         while (idx < xattr_list_len) {
4117                 name = xattr_list + idx;
4118                 name_len = strlen(name);
4119
4120                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4121                 idx += name_len + 1;
4122
4123                 /*
4124                  * CIFS does not support EA other than user.* namespace,
4125                  * still keep the framework generic, to list other attrs
4126                  * in future.
4127                  */
4128                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4129                         continue;
4130
4131                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4132                              STREAM_PREFIX_LEN))
4133                         continue;
4134
4135                 if (req->InputBufferLength &&
4136                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4137                             ea_req->EaNameLength))
4138                         continue;
4139
4140                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4141                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4142                         continue;
4143
4144                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4145                         name_len -= XATTR_USER_PREFIX_LEN;
4146
4147                 ptr = (char *)(&eainfo->name + name_len + 1);
4148                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4149                                 name_len + 1);
4150                 /* bailout if xattr can't fit in buf_free_len */
4151                 value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4152                                                name, &buf);
4153                 if (value_len <= 0) {
4154                         rc = -ENOENT;
4155                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4156                         goto out;
4157                 }
4158
4159                 buf_free_len -= value_len;
4160                 if (buf_free_len < 0) {
4161                         kfree(buf);
4162                         break;
4163                 }
4164
4165                 memcpy(ptr, buf, value_len);
4166                 kfree(buf);
4167
4168                 ptr += value_len;
4169                 eainfo->Flags = 0;
4170                 eainfo->EaNameLength = name_len;
4171
4172                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4173                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4174                                name_len);
4175                 else
4176                         memcpy(eainfo->name, name, name_len);
4177
4178                 eainfo->name[name_len] = '\0';
4179                 eainfo->EaValueLength = cpu_to_le16(value_len);
4180                 next_offset = offsetof(struct smb2_ea_info, name) +
4181                         name_len + 1 + value_len;
4182
4183                 /* align next xattr entry at 4 byte bundary */
4184                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4185                 if (alignment_bytes) {
4186                         memset(ptr, '\0', alignment_bytes);
4187                         ptr += alignment_bytes;
4188                         next_offset += alignment_bytes;
4189                         buf_free_len -= alignment_bytes;
4190                 }
4191                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4192                 prev_eainfo = eainfo;
4193                 eainfo = (struct smb2_ea_info *)ptr;
4194                 rsp_data_cnt += next_offset;
4195
4196                 if (req->InputBufferLength) {
4197                         ksmbd_debug(SMB, "single entry requested\n");
4198                         break;
4199                 }
4200         }
4201
4202         /* no more ea entries */
4203         prev_eainfo->NextEntryOffset = 0;
4204 done:
4205         rc = 0;
4206         if (rsp_data_cnt == 0)
4207                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4208         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4209         inc_rfc1001_len(rsp_org, rsp_data_cnt);
4210 out:
4211         kvfree(xattr_list);
4212         return rc;
4213 }
4214
4215 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4216                                  struct ksmbd_file *fp, void *rsp_org)
4217 {
4218         struct smb2_file_access_info *file_info;
4219
4220         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4221         file_info->AccessFlags = fp->daccess;
4222         rsp->OutputBufferLength =
4223                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4224         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4225 }
4226
4227 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4228                                struct ksmbd_file *fp, void *rsp_org)
4229 {
4230         struct smb2_file_basic_info *basic_info;
4231         struct kstat stat;
4232         u64 time;
4233
4234         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4235                 pr_err("no right to read the attributes : 0x%x\n",
4236                        fp->daccess);
4237                 return -EACCES;
4238         }
4239
4240         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4241         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4242                          &stat);
4243         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4244         time = ksmbd_UnixTimeToNT(stat.atime);
4245         basic_info->LastAccessTime = cpu_to_le64(time);
4246         time = ksmbd_UnixTimeToNT(stat.mtime);
4247         basic_info->LastWriteTime = cpu_to_le64(time);
4248         time = ksmbd_UnixTimeToNT(stat.ctime);
4249         basic_info->ChangeTime = cpu_to_le64(time);
4250         basic_info->Attributes = fp->f_ci->m_fattr;
4251         basic_info->Pad1 = 0;
4252         rsp->OutputBufferLength =
4253                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4254         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4255         return 0;
4256 }
4257
4258 static unsigned long long get_allocation_size(struct inode *inode,
4259                                               struct kstat *stat)
4260 {
4261         unsigned long long alloc_size = 0;
4262
4263         if (!S_ISDIR(stat->mode)) {
4264                 if ((inode->i_blocks << 9) <= stat->size)
4265                         alloc_size = stat->size;
4266                 else
4267                         alloc_size = inode->i_blocks << 9;
4268         }
4269
4270         return alloc_size;
4271 }
4272
4273 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4274                                    struct ksmbd_file *fp, void *rsp_org)
4275 {
4276         struct smb2_file_standard_info *sinfo;
4277         unsigned int delete_pending;
4278         struct inode *inode;
4279         struct kstat stat;
4280
4281         inode = file_inode(fp->filp);
4282         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4283
4284         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4285         delete_pending = ksmbd_inode_pending_delete(fp);
4286
4287         sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4288         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4289         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4290         sinfo->DeletePending = delete_pending;
4291         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4292         rsp->OutputBufferLength =
4293                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4294         inc_rfc1001_len(rsp_org,
4295                         sizeof(struct smb2_file_standard_info));
4296 }
4297
4298 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4299                                     void *rsp_org)
4300 {
4301         struct smb2_file_alignment_info *file_info;
4302
4303         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4304         file_info->AlignmentRequirement = 0;
4305         rsp->OutputBufferLength =
4306                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4307         inc_rfc1001_len(rsp_org,
4308                         sizeof(struct smb2_file_alignment_info));
4309 }
4310
4311 static int get_file_all_info(struct ksmbd_work *work,
4312                              struct smb2_query_info_rsp *rsp,
4313                              struct ksmbd_file *fp,
4314                              void *rsp_org)
4315 {
4316         struct ksmbd_conn *conn = work->conn;
4317         struct smb2_file_all_info *file_info;
4318         unsigned int delete_pending;
4319         struct inode *inode;
4320         struct kstat stat;
4321         int conv_len;
4322         char *filename;
4323         u64 time;
4324
4325         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4326                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4327                             fp->daccess);
4328                 return -EACCES;
4329         }
4330
4331         filename = convert_to_nt_pathname(fp->filename);
4332         if (!filename)
4333                 return -ENOMEM;
4334
4335         inode = file_inode(fp->filp);
4336         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4337
4338         ksmbd_debug(SMB, "filename = %s\n", filename);
4339         delete_pending = ksmbd_inode_pending_delete(fp);
4340         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4341
4342         file_info->CreationTime = cpu_to_le64(fp->create_time);
4343         time = ksmbd_UnixTimeToNT(stat.atime);
4344         file_info->LastAccessTime = cpu_to_le64(time);
4345         time = ksmbd_UnixTimeToNT(stat.mtime);
4346         file_info->LastWriteTime = cpu_to_le64(time);
4347         time = ksmbd_UnixTimeToNT(stat.ctime);
4348         file_info->ChangeTime = cpu_to_le64(time);
4349         file_info->Attributes = fp->f_ci->m_fattr;
4350         file_info->Pad1 = 0;
4351         file_info->AllocationSize =
4352                 cpu_to_le64(get_allocation_size(inode, &stat));
4353         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4354         file_info->NumberOfLinks =
4355                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4356         file_info->DeletePending = delete_pending;
4357         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4358         file_info->Pad2 = 0;
4359         file_info->IndexNumber = cpu_to_le64(stat.ino);
4360         file_info->EASize = 0;
4361         file_info->AccessFlags = fp->daccess;
4362         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4363         file_info->Mode = fp->coption;
4364         file_info->AlignmentRequirement = 0;
4365         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4366                                      PATH_MAX, conn->local_nls, 0);
4367         conv_len *= 2;
4368         file_info->FileNameLength = cpu_to_le32(conv_len);
4369         rsp->OutputBufferLength =
4370                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4371         kfree(filename);
4372         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4373         return 0;
4374 }
4375
4376 static void get_file_alternate_info(struct ksmbd_work *work,
4377                                     struct smb2_query_info_rsp *rsp,
4378                                     struct ksmbd_file *fp,
4379                                     void *rsp_org)
4380 {
4381         struct ksmbd_conn *conn = work->conn;
4382         struct smb2_file_alt_name_info *file_info;
4383         struct dentry *dentry = fp->filp->f_path.dentry;
4384         int conv_len;
4385
4386         spin_lock(&dentry->d_lock);
4387         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4388         conv_len = ksmbd_extract_shortname(conn,
4389                                            dentry->d_name.name,
4390                                            file_info->FileName);
4391         spin_unlock(&dentry->d_lock);
4392         file_info->FileNameLength = cpu_to_le32(conv_len);
4393         rsp->OutputBufferLength =
4394                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4395         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4396 }
4397
4398 static void get_file_stream_info(struct ksmbd_work *work,
4399                                  struct smb2_query_info_rsp *rsp,
4400                                  struct ksmbd_file *fp,
4401                                  void *rsp_org)
4402 {
4403         struct ksmbd_conn *conn = work->conn;
4404         struct smb2_file_stream_info *file_info;
4405         char *stream_name, *xattr_list = NULL, *stream_buf;
4406         struct kstat stat;
4407         struct path *path = &fp->filp->f_path;
4408         ssize_t xattr_list_len;
4409         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4410
4411         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4412                          &stat);
4413         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4414
4415         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4416         if (xattr_list_len < 0) {
4417                 goto out;
4418         } else if (!xattr_list_len) {
4419                 ksmbd_debug(SMB, "empty xattr in the file\n");
4420                 goto out;
4421         }
4422
4423         while (idx < xattr_list_len) {
4424                 stream_name = xattr_list + idx;
4425                 streamlen = strlen(stream_name);
4426                 idx += streamlen + 1;
4427
4428                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4429
4430                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4431                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4432                         continue;
4433
4434                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4435                                 STREAM_PREFIX_LEN);
4436                 streamlen = stream_name_len;
4437
4438                 /* plus : size */
4439                 streamlen += 1;
4440                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4441                 if (!stream_buf)
4442                         break;
4443
4444                 streamlen = snprintf(stream_buf, streamlen + 1,
4445                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4446
4447                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4448                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4449                                                stream_buf, streamlen,
4450                                                conn->local_nls, 0);
4451                 streamlen *= 2;
4452                 kfree(stream_buf);
4453                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4454                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4455                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4456
4457                 next = sizeof(struct smb2_file_stream_info) + streamlen;
4458                 nbytes += next;
4459                 file_info->NextEntryOffset = cpu_to_le32(next);
4460         }
4461
4462         if (!S_ISDIR(stat.mode)) {
4463                 file_info = (struct smb2_file_stream_info *)
4464                         &rsp->Buffer[nbytes];
4465                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4466                                               "::$DATA", 7, conn->local_nls, 0);
4467                 streamlen *= 2;
4468                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4469                 file_info->StreamSize = 0;
4470                 file_info->StreamAllocationSize = 0;
4471                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4472         }
4473
4474         /* last entry offset should be 0 */
4475         file_info->NextEntryOffset = 0;
4476 out:
4477         kvfree(xattr_list);
4478
4479         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4480         inc_rfc1001_len(rsp_org, nbytes);
4481 }
4482
4483 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4484                                    struct ksmbd_file *fp, void *rsp_org)
4485 {
4486         struct smb2_file_internal_info *file_info;
4487         struct kstat stat;
4488
4489         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4490                          &stat);
4491         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4492         file_info->IndexNumber = cpu_to_le64(stat.ino);
4493         rsp->OutputBufferLength =
4494                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4495         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4496 }
4497
4498 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4499                                       struct ksmbd_file *fp, void *rsp_org)
4500 {
4501         struct smb2_file_ntwrk_info *file_info;
4502         struct inode *inode;
4503         struct kstat stat;
4504         u64 time;
4505
4506         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4507                 pr_err("no right to read the attributes : 0x%x\n",
4508                        fp->daccess);
4509                 return -EACCES;
4510         }
4511
4512         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4513
4514         inode = file_inode(fp->filp);
4515         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4516
4517         file_info->CreationTime = cpu_to_le64(fp->create_time);
4518         time = ksmbd_UnixTimeToNT(stat.atime);
4519         file_info->LastAccessTime = cpu_to_le64(time);
4520         time = ksmbd_UnixTimeToNT(stat.mtime);
4521         file_info->LastWriteTime = cpu_to_le64(time);
4522         time = ksmbd_UnixTimeToNT(stat.ctime);
4523         file_info->ChangeTime = cpu_to_le64(time);
4524         file_info->Attributes = fp->f_ci->m_fattr;
4525         file_info->AllocationSize =
4526                 cpu_to_le64(get_allocation_size(inode, &stat));
4527         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4528         file_info->Reserved = cpu_to_le32(0);
4529         rsp->OutputBufferLength =
4530                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4531         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4532         return 0;
4533 }
4534
4535 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4536 {
4537         struct smb2_file_ea_info *file_info;
4538
4539         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4540         file_info->EASize = 0;
4541         rsp->OutputBufferLength =
4542                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4543         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4544 }
4545
4546 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4547                                    struct ksmbd_file *fp, void *rsp_org)
4548 {
4549         struct smb2_file_pos_info *file_info;
4550
4551         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4552         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4553         rsp->OutputBufferLength =
4554                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4555         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4556 }
4557
4558 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4559                                struct ksmbd_file *fp, void *rsp_org)
4560 {
4561         struct smb2_file_mode_info *file_info;
4562
4563         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4564         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4565         rsp->OutputBufferLength =
4566                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4567         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4568 }
4569
4570 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4571                                       struct ksmbd_file *fp, void *rsp_org)
4572 {
4573         struct smb2_file_comp_info *file_info;
4574         struct kstat stat;
4575
4576         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4577                          &stat);
4578
4579         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4580         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4581         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4582         file_info->CompressionUnitShift = 0;
4583         file_info->ChunkShift = 0;
4584         file_info->ClusterShift = 0;
4585         memset(&file_info->Reserved[0], 0, 3);
4586
4587         rsp->OutputBufferLength =
4588                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4589         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4590 }
4591
4592 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4593                                        struct ksmbd_file *fp, void *rsp_org)
4594 {
4595         struct smb2_file_attr_tag_info *file_info;
4596
4597         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4598                 pr_err("no right to read the attributes : 0x%x\n",
4599                        fp->daccess);
4600                 return -EACCES;
4601         }
4602
4603         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4604         file_info->FileAttributes = fp->f_ci->m_fattr;
4605         file_info->ReparseTag = 0;
4606         rsp->OutputBufferLength =
4607                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4608         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4609         return 0;
4610 }
4611
4612 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4613                                 struct ksmbd_file *fp, void *rsp_org)
4614 {
4615         struct smb311_posix_qinfo *file_info;
4616         struct inode *inode = file_inode(fp->filp);
4617         u64 time;
4618
4619         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4620         file_info->CreationTime = cpu_to_le64(fp->create_time);
4621         time = ksmbd_UnixTimeToNT(inode->i_atime);
4622         file_info->LastAccessTime = cpu_to_le64(time);
4623         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4624         file_info->LastWriteTime = cpu_to_le64(time);
4625         time = ksmbd_UnixTimeToNT(inode->i_ctime);
4626         file_info->ChangeTime = cpu_to_le64(time);
4627         file_info->DosAttributes = fp->f_ci->m_fattr;
4628         file_info->Inode = cpu_to_le64(inode->i_ino);
4629         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4630         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4631         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4632         file_info->Mode = cpu_to_le32(inode->i_mode);
4633         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4634         rsp->OutputBufferLength =
4635                 cpu_to_le32(sizeof(struct smb311_posix_qinfo));
4636         inc_rfc1001_len(rsp_org, sizeof(struct smb311_posix_qinfo));
4637         return 0;
4638 }
4639
4640 static int smb2_get_info_file(struct ksmbd_work *work,
4641                               struct smb2_query_info_req *req,
4642                               struct smb2_query_info_rsp *rsp, void *rsp_org)
4643 {
4644         struct ksmbd_file *fp;
4645         int fileinfoclass = 0;
4646         int rc = 0;
4647         int file_infoclass_size;
4648         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4649
4650         if (test_share_config_flag(work->tcon->share_conf,
4651                                    KSMBD_SHARE_FLAG_PIPE)) {
4652                 /* smb2 info file called for pipe */
4653                 return smb2_get_info_file_pipe(work->sess, req, rsp);
4654         }
4655
4656         if (work->next_smb2_rcv_hdr_off) {
4657                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
4658                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4659                                     work->compound_fid);
4660                         id = work->compound_fid;
4661                         pid = work->compound_pfid;
4662                 }
4663         }
4664
4665         if (!has_file_id(id)) {
4666                 id = le64_to_cpu(req->VolatileFileId);
4667                 pid = le64_to_cpu(req->PersistentFileId);
4668         }
4669
4670         fp = ksmbd_lookup_fd_slow(work, id, pid);
4671         if (!fp)
4672                 return -ENOENT;
4673
4674         fileinfoclass = req->FileInfoClass;
4675
4676         switch (fileinfoclass) {
4677         case FILE_ACCESS_INFORMATION:
4678                 get_file_access_info(rsp, fp, rsp_org);
4679                 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4680                 break;
4681
4682         case FILE_BASIC_INFORMATION:
4683                 rc = get_file_basic_info(rsp, fp, rsp_org);
4684                 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4685                 break;
4686
4687         case FILE_STANDARD_INFORMATION:
4688                 get_file_standard_info(rsp, fp, rsp_org);
4689                 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4690                 break;
4691
4692         case FILE_ALIGNMENT_INFORMATION:
4693                 get_file_alignment_info(rsp, rsp_org);
4694                 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4695                 break;
4696
4697         case FILE_ALL_INFORMATION:
4698                 rc = get_file_all_info(work, rsp, fp, rsp_org);
4699                 file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4700                 break;
4701
4702         case FILE_ALTERNATE_NAME_INFORMATION:
4703                 get_file_alternate_info(work, rsp, fp, rsp_org);
4704                 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4705                 break;
4706
4707         case FILE_STREAM_INFORMATION:
4708                 get_file_stream_info(work, rsp, fp, rsp_org);
4709                 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4710                 break;
4711
4712         case FILE_INTERNAL_INFORMATION:
4713                 get_file_internal_info(rsp, fp, rsp_org);
4714                 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4715                 break;
4716
4717         case FILE_NETWORK_OPEN_INFORMATION:
4718                 rc = get_file_network_open_info(rsp, fp, rsp_org);
4719                 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4720                 break;
4721
4722         case FILE_EA_INFORMATION:
4723                 get_file_ea_info(rsp, rsp_org);
4724                 file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4725                 break;
4726
4727         case FILE_FULL_EA_INFORMATION:
4728                 rc = smb2_get_ea(work, fp, req, rsp, rsp_org);
4729                 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4730                 break;
4731
4732         case FILE_POSITION_INFORMATION:
4733                 get_file_position_info(rsp, fp, rsp_org);
4734                 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4735                 break;
4736
4737         case FILE_MODE_INFORMATION:
4738                 get_file_mode_info(rsp, fp, rsp_org);
4739                 file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4740                 break;
4741
4742         case FILE_COMPRESSION_INFORMATION:
4743                 get_file_compression_info(rsp, fp, rsp_org);
4744                 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4745                 break;
4746
4747         case FILE_ATTRIBUTE_TAG_INFORMATION:
4748                 rc = get_file_attribute_tag_info(rsp, fp, rsp_org);
4749                 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4750                 break;
4751         case SMB_FIND_FILE_POSIX_INFO:
4752                 if (!work->tcon->posix_extensions) {
4753                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4754                         rc = -EOPNOTSUPP;
4755                 } else {
4756                         rc = find_file_posix_info(rsp, fp, rsp_org);
4757                         file_infoclass_size = sizeof(struct smb311_posix_qinfo);
4758                 }
4759                 break;
4760         default:
4761                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4762                             fileinfoclass);
4763                 rc = -EOPNOTSUPP;
4764         }
4765         if (!rc)
4766                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4767                                       rsp,
4768                                       file_infoclass_size);
4769         ksmbd_fd_put(work, fp);
4770         return rc;
4771 }
4772
4773 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4774                                     struct smb2_query_info_req *req,
4775                                     struct smb2_query_info_rsp *rsp, void *rsp_org)
4776 {
4777         struct ksmbd_session *sess = work->sess;
4778         struct ksmbd_conn *conn = sess->conn;
4779         struct ksmbd_share_config *share = work->tcon->share_conf;
4780         int fsinfoclass = 0;
4781         struct kstatfs stfs;
4782         struct path path;
4783         int rc = 0, len;
4784         int fs_infoclass_size = 0;
4785
4786         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4787         if (rc) {
4788                 pr_err("cannot create vfs path\n");
4789                 return -EIO;
4790         }
4791
4792         rc = vfs_statfs(&path, &stfs);
4793         if (rc) {
4794                 pr_err("cannot do stat of path %s\n", share->path);
4795                 path_put(&path);
4796                 return -EIO;
4797         }
4798
4799         fsinfoclass = req->FileInfoClass;
4800
4801         switch (fsinfoclass) {
4802         case FS_DEVICE_INFORMATION:
4803         {
4804                 struct filesystem_device_info *info;
4805
4806                 info = (struct filesystem_device_info *)rsp->Buffer;
4807
4808                 info->DeviceType = cpu_to_le32(stfs.f_type);
4809                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4810                 rsp->OutputBufferLength = cpu_to_le32(8);
4811                 inc_rfc1001_len(rsp_org, 8);
4812                 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4813                 break;
4814         }
4815         case FS_ATTRIBUTE_INFORMATION:
4816         {
4817                 struct filesystem_attribute_info *info;
4818                 size_t sz;
4819
4820                 info = (struct filesystem_attribute_info *)rsp->Buffer;
4821                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4822                                                FILE_PERSISTENT_ACLS |
4823                                                FILE_UNICODE_ON_DISK |
4824                                                FILE_CASE_PRESERVED_NAMES |
4825                                                FILE_CASE_SENSITIVE_SEARCH |
4826                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
4827
4828                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4829
4830                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4831                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4832                                         "NTFS", PATH_MAX, conn->local_nls, 0);
4833                 len = len * 2;
4834                 info->FileSystemNameLen = cpu_to_le32(len);
4835                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4836                 rsp->OutputBufferLength = cpu_to_le32(sz);
4837                 inc_rfc1001_len(rsp_org, sz);
4838                 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4839                 break;
4840         }
4841         case FS_VOLUME_INFORMATION:
4842         {
4843                 struct filesystem_vol_info *info;
4844                 size_t sz;
4845
4846                 info = (struct filesystem_vol_info *)(rsp->Buffer);
4847                 info->VolumeCreationTime = 0;
4848                 /* Taking dummy value of serial number*/
4849                 info->SerialNumber = cpu_to_le32(0xbc3ac512);
4850                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4851                                         share->name, PATH_MAX,
4852                                         conn->local_nls, 0);
4853                 len = len * 2;
4854                 info->VolumeLabelSize = cpu_to_le32(len);
4855                 info->Reserved = 0;
4856                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
4857                 rsp->OutputBufferLength = cpu_to_le32(sz);
4858                 inc_rfc1001_len(rsp_org, sz);
4859                 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4860                 break;
4861         }
4862         case FS_SIZE_INFORMATION:
4863         {
4864                 struct filesystem_info *info;
4865
4866                 info = (struct filesystem_info *)(rsp->Buffer);
4867                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4868                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
4869                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4870                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4871                 rsp->OutputBufferLength = cpu_to_le32(24);
4872                 inc_rfc1001_len(rsp_org, 24);
4873                 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
4874                 break;
4875         }
4876         case FS_FULL_SIZE_INFORMATION:
4877         {
4878                 struct smb2_fs_full_size_info *info;
4879
4880                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
4881                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4882                 info->CallerAvailableAllocationUnits =
4883                                         cpu_to_le64(stfs.f_bavail);
4884                 info->ActualAvailableAllocationUnits =
4885                                         cpu_to_le64(stfs.f_bfree);
4886                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4887                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4888                 rsp->OutputBufferLength = cpu_to_le32(32);
4889                 inc_rfc1001_len(rsp_org, 32);
4890                 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
4891                 break;
4892         }
4893         case FS_OBJECT_ID_INFORMATION:
4894         {
4895                 struct object_id_info *info;
4896
4897                 info = (struct object_id_info *)(rsp->Buffer);
4898
4899                 if (!user_guest(sess->user))
4900                         memcpy(info->objid, user_passkey(sess->user), 16);
4901                 else
4902                         memset(info->objid, 0, 16);
4903
4904                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
4905                 info->extended_info.version = cpu_to_le32(1);
4906                 info->extended_info.release = cpu_to_le32(1);
4907                 info->extended_info.rel_date = 0;
4908                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
4909                 rsp->OutputBufferLength = cpu_to_le32(64);
4910                 inc_rfc1001_len(rsp_org, 64);
4911                 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
4912                 break;
4913         }
4914         case FS_SECTOR_SIZE_INFORMATION:
4915         {
4916                 struct smb3_fs_ss_info *info;
4917
4918                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
4919
4920                 info->LogicalBytesPerSector = cpu_to_le32(stfs.f_bsize);
4921                 info->PhysicalBytesPerSectorForAtomicity =
4922                                 cpu_to_le32(stfs.f_bsize);
4923                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(stfs.f_bsize);
4924                 info->FSEffPhysicalBytesPerSectorForAtomicity =
4925                                 cpu_to_le32(stfs.f_bsize);
4926                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
4927                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
4928                 info->ByteOffsetForSectorAlignment = 0;
4929                 info->ByteOffsetForPartitionAlignment = 0;
4930                 rsp->OutputBufferLength = cpu_to_le32(28);
4931                 inc_rfc1001_len(rsp_org, 28);
4932                 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
4933                 break;
4934         }
4935         case FS_CONTROL_INFORMATION:
4936         {
4937                 /*
4938                  * TODO : The current implementation is based on
4939                  * test result with win7(NTFS) server. It's need to
4940                  * modify this to get valid Quota values
4941                  * from Linux kernel
4942                  */
4943                 struct smb2_fs_control_info *info;
4944
4945                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
4946                 info->FreeSpaceStartFiltering = 0;
4947                 info->FreeSpaceThreshold = 0;
4948                 info->FreeSpaceStopFiltering = 0;
4949                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
4950                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
4951                 info->Padding = 0;
4952                 rsp->OutputBufferLength = cpu_to_le32(48);
4953                 inc_rfc1001_len(rsp_org, 48);
4954                 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
4955                 break;
4956         }
4957         case FS_POSIX_INFORMATION:
4958         {
4959                 struct filesystem_posix_info *info;
4960
4961                 if (!work->tcon->posix_extensions) {
4962                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4963                         rc = -EOPNOTSUPP;
4964                 } else {
4965                         info = (struct filesystem_posix_info *)(rsp->Buffer);
4966                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
4967                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
4968                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
4969                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
4970                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
4971                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
4972                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
4973                         rsp->OutputBufferLength = cpu_to_le32(56);
4974                         inc_rfc1001_len(rsp_org, 56);
4975                         fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
4976                 }
4977                 break;
4978         }
4979         default:
4980                 path_put(&path);
4981                 return -EOPNOTSUPP;
4982         }
4983         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4984                               rsp,
4985                               fs_infoclass_size);
4986         path_put(&path);
4987         return rc;
4988 }
4989
4990 static int smb2_get_info_sec(struct ksmbd_work *work,
4991                              struct smb2_query_info_req *req,
4992                              struct smb2_query_info_rsp *rsp, void *rsp_org)
4993 {
4994         struct ksmbd_file *fp;
4995         struct user_namespace *user_ns;
4996         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
4997         struct smb_fattr fattr = {{0}};
4998         struct inode *inode;
4999         __u32 secdesclen;
5000         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5001         int addition_info = le32_to_cpu(req->AdditionalInformation);
5002         int rc;
5003
5004         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5005                               PROTECTED_DACL_SECINFO |
5006                               UNPROTECTED_DACL_SECINFO)) {
5007                 pr_err("Unsupported addition info: 0x%x)\n",
5008                        addition_info);
5009
5010                 pntsd->revision = cpu_to_le16(1);
5011                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5012                 pntsd->osidoffset = 0;
5013                 pntsd->gsidoffset = 0;
5014                 pntsd->sacloffset = 0;
5015                 pntsd->dacloffset = 0;
5016
5017                 secdesclen = sizeof(struct smb_ntsd);
5018                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5019                 inc_rfc1001_len(rsp_org, secdesclen);
5020
5021                 return 0;
5022         }
5023
5024         if (work->next_smb2_rcv_hdr_off) {
5025                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5026                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5027                                     work->compound_fid);
5028                         id = work->compound_fid;
5029                         pid = work->compound_pfid;
5030                 }
5031         }
5032
5033         if (!has_file_id(id)) {
5034                 id = le64_to_cpu(req->VolatileFileId);
5035                 pid = le64_to_cpu(req->PersistentFileId);
5036         }
5037
5038         fp = ksmbd_lookup_fd_slow(work, id, pid);
5039         if (!fp)
5040                 return -ENOENT;
5041
5042         user_ns = file_mnt_user_ns(fp->filp);
5043         inode = file_inode(fp->filp);
5044         ksmbd_acls_fattr(&fattr, user_ns, inode);
5045
5046         if (test_share_config_flag(work->tcon->share_conf,
5047                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5048                 ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5049                                        fp->filp->f_path.dentry, &ppntsd);
5050
5051         rc = build_sec_desc(user_ns, pntsd, ppntsd, addition_info,
5052                             &secdesclen, &fattr);
5053         posix_acl_release(fattr.cf_acls);
5054         posix_acl_release(fattr.cf_dacls);
5055         kfree(ppntsd);
5056         ksmbd_fd_put(work, fp);
5057         if (rc)
5058                 return rc;
5059
5060         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5061         inc_rfc1001_len(rsp_org, secdesclen);
5062         return 0;
5063 }
5064
5065 /**
5066  * smb2_query_info() - handler for smb2 query info command
5067  * @work:       smb work containing query info request buffer
5068  *
5069  * Return:      0 on success, otherwise error
5070  */
5071 int smb2_query_info(struct ksmbd_work *work)
5072 {
5073         struct smb2_query_info_req *req;
5074         struct smb2_query_info_rsp *rsp, *rsp_org;
5075         int rc = 0;
5076
5077         rsp_org = work->response_buf;
5078         WORK_BUFFERS(work, req, rsp);
5079
5080         ksmbd_debug(SMB, "GOT query info request\n");
5081
5082         switch (req->InfoType) {
5083         case SMB2_O_INFO_FILE:
5084                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5085                 rc = smb2_get_info_file(work, req, rsp, (void *)rsp_org);
5086                 break;
5087         case SMB2_O_INFO_FILESYSTEM:
5088                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5089                 rc = smb2_get_info_filesystem(work, req, rsp, (void *)rsp_org);
5090                 break;
5091         case SMB2_O_INFO_SECURITY:
5092                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5093                 rc = smb2_get_info_sec(work, req, rsp, (void *)rsp_org);
5094                 break;
5095         default:
5096                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5097                             req->InfoType);
5098                 rc = -EOPNOTSUPP;
5099         }
5100
5101         if (rc < 0) {
5102                 if (rc == -EACCES)
5103                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5104                 else if (rc == -ENOENT)
5105                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5106                 else if (rc == -EIO)
5107                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5108                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5109                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5110                 smb2_set_err_rsp(work);
5111
5112                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5113                             rc);
5114                 return rc;
5115         }
5116         rsp->StructureSize = cpu_to_le16(9);
5117         rsp->OutputBufferOffset = cpu_to_le16(72);
5118         inc_rfc1001_len(rsp_org, 8);
5119         return 0;
5120 }
5121
5122 /**
5123  * smb2_close_pipe() - handler for closing IPC pipe
5124  * @work:       smb work containing close request buffer
5125  *
5126  * Return:      0
5127  */
5128 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5129 {
5130         u64 id;
5131         struct smb2_close_req *req = work->request_buf;
5132         struct smb2_close_rsp *rsp = work->response_buf;
5133
5134         id = le64_to_cpu(req->VolatileFileId);
5135         ksmbd_session_rpc_close(work->sess, id);
5136
5137         rsp->StructureSize = cpu_to_le16(60);
5138         rsp->Flags = 0;
5139         rsp->Reserved = 0;
5140         rsp->CreationTime = 0;
5141         rsp->LastAccessTime = 0;
5142         rsp->LastWriteTime = 0;
5143         rsp->ChangeTime = 0;
5144         rsp->AllocationSize = 0;
5145         rsp->EndOfFile = 0;
5146         rsp->Attributes = 0;
5147         inc_rfc1001_len(rsp, 60);
5148         return 0;
5149 }
5150
5151 /**
5152  * smb2_close() - handler for smb2 close file command
5153  * @work:       smb work containing close request buffer
5154  *
5155  * Return:      0
5156  */
5157 int smb2_close(struct ksmbd_work *work)
5158 {
5159         u64 volatile_id = KSMBD_NO_FID;
5160         u64 sess_id;
5161         struct smb2_close_req *req;
5162         struct smb2_close_rsp *rsp;
5163         struct smb2_close_rsp *rsp_org;
5164         struct ksmbd_conn *conn = work->conn;
5165         struct ksmbd_file *fp;
5166         struct inode *inode;
5167         u64 time;
5168         int err = 0;
5169
5170         rsp_org = work->response_buf;
5171         WORK_BUFFERS(work, req, rsp);
5172
5173         if (test_share_config_flag(work->tcon->share_conf,
5174                                    KSMBD_SHARE_FLAG_PIPE)) {
5175                 ksmbd_debug(SMB, "IPC pipe close request\n");
5176                 return smb2_close_pipe(work);
5177         }
5178
5179         sess_id = le64_to_cpu(req->hdr.SessionId);
5180         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5181                 sess_id = work->compound_sid;
5182
5183         work->compound_sid = 0;
5184         if (check_session_id(conn, sess_id)) {
5185                 work->compound_sid = sess_id;
5186         } else {
5187                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5188                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5189                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5190                 err = -EBADF;
5191                 goto out;
5192         }
5193
5194         if (work->next_smb2_rcv_hdr_off &&
5195             !has_file_id(le64_to_cpu(req->VolatileFileId))) {
5196                 if (!has_file_id(work->compound_fid)) {
5197                         /* file already closed, return FILE_CLOSED */
5198                         ksmbd_debug(SMB, "file already closed\n");
5199                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5200                         err = -EBADF;
5201                         goto out;
5202                 } else {
5203                         ksmbd_debug(SMB,
5204                                     "Compound request set FID = %llu:%llu\n",
5205                                     work->compound_fid,
5206                                     work->compound_pfid);
5207                         volatile_id = work->compound_fid;
5208
5209                         /* file closed, stored id is not valid anymore */
5210                         work->compound_fid = KSMBD_NO_FID;
5211                         work->compound_pfid = KSMBD_NO_FID;
5212                 }
5213         } else {
5214                 volatile_id = le64_to_cpu(req->VolatileFileId);
5215         }
5216         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5217
5218         rsp->StructureSize = cpu_to_le16(60);
5219         rsp->Reserved = 0;
5220
5221         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5222                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5223                 if (!fp) {
5224                         err = -ENOENT;
5225                         goto out;
5226                 }
5227
5228                 inode = file_inode(fp->filp);
5229                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5230                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5231                         cpu_to_le64(inode->i_blocks << 9);
5232                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5233                 rsp->Attributes = fp->f_ci->m_fattr;
5234                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5235                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5236                 rsp->LastAccessTime = cpu_to_le64(time);
5237                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5238                 rsp->LastWriteTime = cpu_to_le64(time);
5239                 time = ksmbd_UnixTimeToNT(inode->i_ctime);
5240                 rsp->ChangeTime = cpu_to_le64(time);
5241                 ksmbd_fd_put(work, fp);
5242         } else {
5243                 rsp->Flags = 0;
5244                 rsp->AllocationSize = 0;
5245                 rsp->EndOfFile = 0;
5246                 rsp->Attributes = 0;
5247                 rsp->CreationTime = 0;
5248                 rsp->LastAccessTime = 0;
5249                 rsp->LastWriteTime = 0;
5250                 rsp->ChangeTime = 0;
5251         }
5252
5253         err = ksmbd_close_fd(work, volatile_id);
5254 out:
5255         if (err) {
5256                 if (rsp->hdr.Status == 0)
5257                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5258                 smb2_set_err_rsp(work);
5259         } else {
5260                 inc_rfc1001_len(rsp_org, 60);
5261         }
5262
5263         return 0;
5264 }
5265
5266 /**
5267  * smb2_echo() - handler for smb2 echo(ping) command
5268  * @work:       smb work containing echo request buffer
5269  *
5270  * Return:      0
5271  */
5272 int smb2_echo(struct ksmbd_work *work)
5273 {
5274         struct smb2_echo_rsp *rsp = work->response_buf;
5275
5276         rsp->StructureSize = cpu_to_le16(4);
5277         rsp->Reserved = 0;
5278         inc_rfc1001_len(rsp, 4);
5279         return 0;
5280 }
5281
5282 static int smb2_rename(struct ksmbd_work *work,
5283                        struct ksmbd_file *fp,
5284                        struct user_namespace *user_ns,
5285                        struct smb2_file_rename_info *file_info,
5286                        struct nls_table *local_nls)
5287 {
5288         struct ksmbd_share_config *share = fp->tcon->share_conf;
5289         char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5290         char *pathname = NULL;
5291         struct path path;
5292         bool file_present = true;
5293         int rc;
5294
5295         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5296         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5297         if (!pathname)
5298                 return -ENOMEM;
5299
5300         abs_oldname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
5301         if (IS_ERR(abs_oldname)) {
5302                 rc = -EINVAL;
5303                 goto out;
5304         }
5305         old_name = strrchr(abs_oldname, '/');
5306         if (old_name && old_name[1] != '\0') {
5307                 old_name++;
5308         } else {
5309                 ksmbd_debug(SMB, "can't get last component in path %s\n",
5310                             abs_oldname);
5311                 rc = -ENOENT;
5312                 goto out;
5313         }
5314
5315         new_name = smb2_get_name(share,
5316                                  file_info->FileName,
5317                                  le32_to_cpu(file_info->FileNameLength),
5318                                  local_nls);
5319         if (IS_ERR(new_name)) {
5320                 rc = PTR_ERR(new_name);
5321                 goto out;
5322         }
5323
5324         if (strchr(new_name, ':')) {
5325                 int s_type;
5326                 char *xattr_stream_name, *stream_name = NULL;
5327                 size_t xattr_stream_size;
5328                 int len;
5329
5330                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5331                 if (rc < 0)
5332                         goto out;
5333
5334                 len = strlen(new_name);
5335                 if (len > 0 && new_name[len - 1] != '/') {
5336                         pr_err("not allow base filename in rename\n");
5337                         rc = -ESHARE;
5338                         goto out;
5339                 }
5340
5341                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5342                                                  &xattr_stream_name,
5343                                                  &xattr_stream_size,
5344                                                  s_type);
5345                 if (rc)
5346                         goto out;
5347
5348                 rc = ksmbd_vfs_setxattr(user_ns,
5349                                         fp->filp->f_path.dentry,
5350                                         xattr_stream_name,
5351                                         NULL, 0, 0);
5352                 if (rc < 0) {
5353                         pr_err("failed to store stream name in xattr: %d\n",
5354                                rc);
5355                         rc = -EINVAL;
5356                         goto out;
5357                 }
5358
5359                 goto out;
5360         }
5361
5362         ksmbd_debug(SMB, "new name %s\n", new_name);
5363         rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5364         if (rc) {
5365                 if (rc != -ENOENT)
5366                         goto out;
5367                 file_present = false;
5368         } else {
5369                 path_put(&path);
5370         }
5371
5372         if (ksmbd_share_veto_filename(share, new_name)) {
5373                 rc = -ENOENT;
5374                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5375                 goto out;
5376         }
5377
5378         if (file_info->ReplaceIfExists) {
5379                 if (file_present) {
5380                         rc = ksmbd_vfs_remove_file(work, new_name);
5381                         if (rc) {
5382                                 if (rc != -ENOTEMPTY)
5383                                         rc = -EINVAL;
5384                                 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5385                                             new_name, rc);
5386                                 goto out;
5387                         }
5388                 }
5389         } else {
5390                 if (file_present &&
5391                     strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5392                         rc = -EEXIST;
5393                         ksmbd_debug(SMB,
5394                                     "cannot rename already existing file\n");
5395                         goto out;
5396                 }
5397         }
5398
5399         rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5400 out:
5401         kfree(pathname);
5402         if (!IS_ERR(new_name))
5403                 kfree(new_name);
5404         return rc;
5405 }
5406
5407 static int smb2_create_link(struct ksmbd_work *work,
5408                             struct ksmbd_share_config *share,
5409                             struct smb2_file_link_info *file_info,
5410                             unsigned int buf_len, struct file *filp,
5411                             struct nls_table *local_nls)
5412 {
5413         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5414         struct path path;
5415         bool file_present = true;
5416         int rc;
5417
5418         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5419                         le32_to_cpu(file_info->FileNameLength))
5420                 return -EINVAL;
5421
5422         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5423         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5424         if (!pathname)
5425                 return -ENOMEM;
5426
5427         link_name = smb2_get_name(share,
5428                                   file_info->FileName,
5429                                   le32_to_cpu(file_info->FileNameLength),
5430                                   local_nls);
5431         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5432                 rc = -EINVAL;
5433                 goto out;
5434         }
5435
5436         ksmbd_debug(SMB, "link name is %s\n", link_name);
5437         target_name = d_path(&filp->f_path, pathname, PATH_MAX);
5438         if (IS_ERR(target_name)) {
5439                 rc = -EINVAL;
5440                 goto out;
5441         }
5442
5443         ksmbd_debug(SMB, "target name is %s\n", target_name);
5444         rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5445         if (rc) {
5446                 if (rc != -ENOENT)
5447                         goto out;
5448                 file_present = false;
5449         } else {
5450                 path_put(&path);
5451         }
5452
5453         if (file_info->ReplaceIfExists) {
5454                 if (file_present) {
5455                         rc = ksmbd_vfs_remove_file(work, link_name);
5456                         if (rc) {
5457                                 rc = -EINVAL;
5458                                 ksmbd_debug(SMB, "cannot delete %s\n",
5459                                             link_name);
5460                                 goto out;
5461                         }
5462                 }
5463         } else {
5464                 if (file_present) {
5465                         rc = -EEXIST;
5466                         ksmbd_debug(SMB, "link already exists\n");
5467                         goto out;
5468                 }
5469         }
5470
5471         rc = ksmbd_vfs_link(work, target_name, link_name);
5472         if (rc)
5473                 rc = -EINVAL;
5474 out:
5475         if (!IS_ERR(link_name))
5476                 kfree(link_name);
5477         kfree(pathname);
5478         return rc;
5479 }
5480
5481 static int set_file_basic_info(struct ksmbd_file *fp,
5482                                struct smb2_file_basic_info *file_info,
5483                                struct ksmbd_share_config *share)
5484 {
5485         struct iattr attrs;
5486         struct file *filp;
5487         struct inode *inode;
5488         struct user_namespace *user_ns;
5489         int rc = 0;
5490
5491         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5492                 return -EACCES;
5493
5494         attrs.ia_valid = 0;
5495         filp = fp->filp;
5496         inode = file_inode(filp);
5497         user_ns = file_mnt_user_ns(filp);
5498
5499         if (file_info->CreationTime)
5500                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5501
5502         if (file_info->LastAccessTime) {
5503                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5504                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5505         }
5506
5507         attrs.ia_valid |= ATTR_CTIME;
5508         if (file_info->ChangeTime)
5509                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5510         else
5511                 attrs.ia_ctime = inode->i_ctime;
5512
5513         if (file_info->LastWriteTime) {
5514                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5515                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5516         }
5517
5518         if (file_info->Attributes) {
5519                 if (!S_ISDIR(inode->i_mode) &&
5520                     file_info->Attributes & ATTR_DIRECTORY_LE) {
5521                         pr_err("can't change a file to a directory\n");
5522                         return -EINVAL;
5523                 }
5524
5525                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == ATTR_NORMAL_LE))
5526                         fp->f_ci->m_fattr = file_info->Attributes |
5527                                 (fp->f_ci->m_fattr & ATTR_DIRECTORY_LE);
5528         }
5529
5530         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5531             (file_info->CreationTime || file_info->Attributes)) {
5532                 struct xattr_dos_attrib da = {0};
5533
5534                 da.version = 4;
5535                 da.itime = fp->itime;
5536                 da.create_time = fp->create_time;
5537                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5538                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5539                         XATTR_DOSINFO_ITIME;
5540
5541                 rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5542                                                     filp->f_path.dentry, &da);
5543                 if (rc)
5544                         ksmbd_debug(SMB,
5545                                     "failed to restore file attribute in EA\n");
5546                 rc = 0;
5547         }
5548
5549         if (attrs.ia_valid) {
5550                 struct dentry *dentry = filp->f_path.dentry;
5551                 struct inode *inode = d_inode(dentry);
5552
5553                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5554                         return -EACCES;
5555
5556                 inode_lock(inode);
5557                 inode->i_ctime = attrs.ia_ctime;
5558                 attrs.ia_valid &= ~ATTR_CTIME;
5559                 rc = notify_change(user_ns, dentry, &attrs, NULL);
5560                 inode_unlock(inode);
5561         }
5562         return rc;
5563 }
5564
5565 static int set_file_allocation_info(struct ksmbd_work *work,
5566                                     struct ksmbd_file *fp,
5567                                     struct smb2_file_alloc_info *file_alloc_info)
5568 {
5569         /*
5570          * TODO : It's working fine only when store dos attributes
5571          * is not yes. need to implement a logic which works
5572          * properly with any smb.conf option
5573          */
5574
5575         loff_t alloc_blks;
5576         struct inode *inode;
5577         int rc;
5578
5579         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5580                 return -EACCES;
5581
5582         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5583         inode = file_inode(fp->filp);
5584
5585         if (alloc_blks > inode->i_blocks) {
5586                 smb_break_all_levII_oplock(work, fp, 1);
5587                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5588                                    alloc_blks * 512);
5589                 if (rc && rc != -EOPNOTSUPP) {
5590                         pr_err("vfs_fallocate is failed : %d\n", rc);
5591                         return rc;
5592                 }
5593         } else if (alloc_blks < inode->i_blocks) {
5594                 loff_t size;
5595
5596                 /*
5597                  * Allocation size could be smaller than original one
5598                  * which means allocated blocks in file should be
5599                  * deallocated. use truncate to cut out it, but inode
5600                  * size is also updated with truncate offset.
5601                  * inode size is retained by backup inode size.
5602                  */
5603                 size = i_size_read(inode);
5604                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5605                 if (rc) {
5606                         pr_err("truncate failed! filename : %s, err %d\n",
5607                                fp->filename, rc);
5608                         return rc;
5609                 }
5610                 if (size < alloc_blks * 512)
5611                         i_size_write(inode, size);
5612         }
5613         return 0;
5614 }
5615
5616 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5617                                 struct smb2_file_eof_info *file_eof_info)
5618 {
5619         loff_t newsize;
5620         struct inode *inode;
5621         int rc;
5622
5623         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5624                 return -EACCES;
5625
5626         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5627         inode = file_inode(fp->filp);
5628
5629         /*
5630          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5631          * on FAT32 shared device, truncate execution time is too long
5632          * and network error could cause from windows client. because
5633          * truncate of some filesystem like FAT32 fill zero data in
5634          * truncated range.
5635          */
5636         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5637                 ksmbd_debug(SMB, "filename : %s truncated to newsize %lld\n",
5638                             fp->filename, newsize);
5639                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5640                 if (rc) {
5641                         ksmbd_debug(SMB, "truncate failed! filename : %s err %d\n",
5642                                     fp->filename, rc);
5643                         if (rc != -EAGAIN)
5644                                 rc = -EBADF;
5645                         return rc;
5646                 }
5647         }
5648         return 0;
5649 }
5650
5651 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5652                            struct smb2_file_rename_info *rename_info,
5653                            unsigned int buf_len)
5654 {
5655         struct user_namespace *user_ns;
5656         struct ksmbd_file *parent_fp;
5657         struct dentry *parent;
5658         struct dentry *dentry = fp->filp->f_path.dentry;
5659         int ret;
5660
5661         if (!(fp->daccess & FILE_DELETE_LE)) {
5662                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5663                 return -EACCES;
5664         }
5665
5666         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5667                         le32_to_cpu(rename_info->FileNameLength))
5668                 return -EINVAL;
5669
5670         user_ns = file_mnt_user_ns(fp->filp);
5671         if (ksmbd_stream_fd(fp))
5672                 goto next;
5673
5674         parent = dget_parent(dentry);
5675         ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5676         if (ret) {
5677                 dput(parent);
5678                 return ret;
5679         }
5680
5681         parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5682         inode_unlock(d_inode(parent));
5683         dput(parent);
5684
5685         if (parent_fp) {
5686                 if (parent_fp->daccess & FILE_DELETE_LE) {
5687                         pr_err("parent dir is opened with delete access\n");
5688                         return -ESHARE;
5689                 }
5690         }
5691 next:
5692         return smb2_rename(work, fp, user_ns, rename_info,
5693                            work->sess->conn->local_nls);
5694 }
5695
5696 static int set_file_disposition_info(struct ksmbd_file *fp,
5697                                      struct smb2_file_disposition_info *file_info)
5698 {
5699         struct inode *inode;
5700
5701         if (!(fp->daccess & FILE_DELETE_LE)) {
5702                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5703                 return -EACCES;
5704         }
5705
5706         inode = file_inode(fp->filp);
5707         if (file_info->DeletePending) {
5708                 if (S_ISDIR(inode->i_mode) &&
5709                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5710                         return -EBUSY;
5711                 ksmbd_set_inode_pending_delete(fp);
5712         } else {
5713                 ksmbd_clear_inode_pending_delete(fp);
5714         }
5715         return 0;
5716 }
5717
5718 static int set_file_position_info(struct ksmbd_file *fp,
5719                                   struct smb2_file_pos_info *file_info)
5720 {
5721         loff_t current_byte_offset;
5722         unsigned long sector_size;
5723         struct inode *inode;
5724
5725         inode = file_inode(fp->filp);
5726         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5727         sector_size = inode->i_sb->s_blocksize;
5728
5729         if (current_byte_offset < 0 ||
5730             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5731              current_byte_offset & (sector_size - 1))) {
5732                 pr_err("CurrentByteOffset is not valid : %llu\n",
5733                        current_byte_offset);
5734                 return -EINVAL;
5735         }
5736
5737         fp->filp->f_pos = current_byte_offset;
5738         return 0;
5739 }
5740
5741 static int set_file_mode_info(struct ksmbd_file *fp,
5742                               struct smb2_file_mode_info *file_info)
5743 {
5744         __le32 mode;
5745
5746         mode = file_info->Mode;
5747
5748         if ((mode & ~FILE_MODE_INFO_MASK) ||
5749             (mode & FILE_SYNCHRONOUS_IO_ALERT_LE &&
5750              mode & FILE_SYNCHRONOUS_IO_NONALERT_LE)) {
5751                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5752                 return -EINVAL;
5753         }
5754
5755         /*
5756          * TODO : need to implement consideration for
5757          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5758          */
5759         ksmbd_vfs_set_fadvise(fp->filp, mode);
5760         fp->coption = mode;
5761         return 0;
5762 }
5763
5764 /**
5765  * smb2_set_info_file() - handler for smb2 set info command
5766  * @work:       smb work containing set info command buffer
5767  * @fp:         ksmbd_file pointer
5768  * @info_class: smb2 set info class
5769  * @share:      ksmbd_share_config pointer
5770  *
5771  * Return:      0 on success, otherwise error
5772  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5773  */
5774 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5775                               struct smb2_set_info_req *req,
5776                               struct ksmbd_share_config *share)
5777 {
5778         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5779
5780         switch (req->FileInfoClass) {
5781         case FILE_BASIC_INFORMATION:
5782         {
5783                 if (buf_len < sizeof(struct smb2_file_basic_info))
5784                         return -EINVAL;
5785
5786                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5787         }
5788         case FILE_ALLOCATION_INFORMATION:
5789         {
5790                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5791                         return -EINVAL;
5792
5793                 return set_file_allocation_info(work, fp,
5794                                                 (struct smb2_file_alloc_info *)req->Buffer);
5795         }
5796         case FILE_END_OF_FILE_INFORMATION:
5797         {
5798                 if (buf_len < sizeof(struct smb2_file_eof_info))
5799                         return -EINVAL;
5800
5801                 return set_end_of_file_info(work, fp,
5802                                             (struct smb2_file_eof_info *)req->Buffer);
5803         }
5804         case FILE_RENAME_INFORMATION:
5805         {
5806                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5807                         ksmbd_debug(SMB,
5808                                     "User does not have write permission\n");
5809                         return -EACCES;
5810                 }
5811
5812                 if (buf_len < sizeof(struct smb2_file_rename_info))
5813                         return -EINVAL;
5814
5815                 return set_rename_info(work, fp,
5816                                        (struct smb2_file_rename_info *)req->Buffer,
5817                                        buf_len);
5818         }
5819         case FILE_LINK_INFORMATION:
5820         {
5821                 if (buf_len < sizeof(struct smb2_file_link_info))
5822                         return -EINVAL;
5823
5824                 return smb2_create_link(work, work->tcon->share_conf,
5825                                         (struct smb2_file_link_info *)req->Buffer,
5826                                         buf_len, fp->filp,
5827                                         work->sess->conn->local_nls);
5828         }
5829         case FILE_DISPOSITION_INFORMATION:
5830         {
5831                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5832                         ksmbd_debug(SMB,
5833                                     "User does not have write permission\n");
5834                         return -EACCES;
5835                 }
5836
5837                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5838                         return -EINVAL;
5839
5840                 return set_file_disposition_info(fp,
5841                                                  (struct smb2_file_disposition_info *)req->Buffer);
5842         }
5843         case FILE_FULL_EA_INFORMATION:
5844         {
5845                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5846                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5847                                fp->daccess);
5848                         return -EACCES;
5849                 }
5850
5851                 if (buf_len < sizeof(struct smb2_ea_info))
5852                         return -EINVAL;
5853
5854                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5855                                    buf_len, &fp->filp->f_path);
5856         }
5857         case FILE_POSITION_INFORMATION:
5858         {
5859                 if (buf_len < sizeof(struct smb2_file_pos_info))
5860                         return -EINVAL;
5861
5862                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5863         }
5864         case FILE_MODE_INFORMATION:
5865         {
5866                 if (buf_len < sizeof(struct smb2_file_mode_info))
5867                         return -EINVAL;
5868
5869                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5870         }
5871         }
5872
5873         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
5874         return -EOPNOTSUPP;
5875 }
5876
5877 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
5878                              char *buffer, int buf_len)
5879 {
5880         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
5881
5882         fp->saccess |= FILE_SHARE_DELETE_LE;
5883
5884         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
5885                         buf_len, false);
5886 }
5887
5888 /**
5889  * smb2_set_info() - handler for smb2 set info command handler
5890  * @work:       smb work containing set info request buffer
5891  *
5892  * Return:      0 on success, otherwise error
5893  */
5894 int smb2_set_info(struct ksmbd_work *work)
5895 {
5896         struct smb2_set_info_req *req;
5897         struct smb2_set_info_rsp *rsp, *rsp_org;
5898         struct ksmbd_file *fp;
5899         int rc = 0;
5900         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5901
5902         ksmbd_debug(SMB, "Received set info request\n");
5903
5904         rsp_org = work->response_buf;
5905         if (work->next_smb2_rcv_hdr_off) {
5906                 req = ksmbd_req_buf_next(work);
5907                 rsp = ksmbd_resp_buf_next(work);
5908                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5909                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5910                                     work->compound_fid);
5911                         id = work->compound_fid;
5912                         pid = work->compound_pfid;
5913                 }
5914         } else {
5915                 req = work->request_buf;
5916                 rsp = work->response_buf;
5917         }
5918
5919         if (!has_file_id(id)) {
5920                 id = le64_to_cpu(req->VolatileFileId);
5921                 pid = le64_to_cpu(req->PersistentFileId);
5922         }
5923
5924         fp = ksmbd_lookup_fd_slow(work, id, pid);
5925         if (!fp) {
5926                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
5927                 rc = -ENOENT;
5928                 goto err_out;
5929         }
5930
5931         switch (req->InfoType) {
5932         case SMB2_O_INFO_FILE:
5933                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5934                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
5935                 break;
5936         case SMB2_O_INFO_SECURITY:
5937                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5938                 if (ksmbd_override_fsids(work)) {
5939                         rc = -ENOMEM;
5940                         goto err_out;
5941                 }
5942                 rc = smb2_set_info_sec(fp,
5943                                        le32_to_cpu(req->AdditionalInformation),
5944                                        req->Buffer,
5945                                        le32_to_cpu(req->BufferLength));
5946                 ksmbd_revert_fsids(work);
5947                 break;
5948         default:
5949                 rc = -EOPNOTSUPP;
5950         }
5951
5952         if (rc < 0)
5953                 goto err_out;
5954
5955         rsp->StructureSize = cpu_to_le16(2);
5956         inc_rfc1001_len(rsp_org, 2);
5957         ksmbd_fd_put(work, fp);
5958         return 0;
5959
5960 err_out:
5961         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
5962                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5963         else if (rc == -EINVAL)
5964                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5965         else if (rc == -ESHARE)
5966                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
5967         else if (rc == -ENOENT)
5968                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
5969         else if (rc == -EBUSY || rc == -ENOTEMPTY)
5970                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
5971         else if (rc == -EAGAIN)
5972                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
5973         else if (rc == -EBADF || rc == -ESTALE)
5974                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
5975         else if (rc == -EEXIST)
5976                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
5977         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
5978                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5979         smb2_set_err_rsp(work);
5980         ksmbd_fd_put(work, fp);
5981         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
5982         return rc;
5983 }
5984
5985 /**
5986  * smb2_read_pipe() - handler for smb2 read from IPC pipe
5987  * @work:       smb work containing read IPC pipe command buffer
5988  *
5989  * Return:      0 on success, otherwise error
5990  */
5991 static noinline int smb2_read_pipe(struct ksmbd_work *work)
5992 {
5993         int nbytes = 0, err;
5994         u64 id;
5995         struct ksmbd_rpc_command *rpc_resp;
5996         struct smb2_read_req *req = work->request_buf;
5997         struct smb2_read_rsp *rsp = work->response_buf;
5998
5999         id = le64_to_cpu(req->VolatileFileId);
6000
6001         inc_rfc1001_len(rsp, 16);
6002         rpc_resp = ksmbd_rpc_read(work->sess, id);
6003         if (rpc_resp) {
6004                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6005                         err = -EINVAL;
6006                         goto out;
6007                 }
6008
6009                 work->aux_payload_buf =
6010                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6011                 if (!work->aux_payload_buf) {
6012                         err = -ENOMEM;
6013                         goto out;
6014                 }
6015
6016                 memcpy(work->aux_payload_buf, rpc_resp->payload,
6017                        rpc_resp->payload_sz);
6018
6019                 nbytes = rpc_resp->payload_sz;
6020                 work->resp_hdr_sz = get_rfc1002_len(rsp) + 4;
6021                 work->aux_payload_sz = nbytes;
6022                 kvfree(rpc_resp);
6023         }
6024
6025         rsp->StructureSize = cpu_to_le16(17);
6026         rsp->DataOffset = 80;
6027         rsp->Reserved = 0;
6028         rsp->DataLength = cpu_to_le32(nbytes);
6029         rsp->DataRemaining = 0;
6030         rsp->Reserved2 = 0;
6031         inc_rfc1001_len(rsp, nbytes);
6032         return 0;
6033
6034 out:
6035         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6036         smb2_set_err_rsp(work);
6037         kvfree(rpc_resp);
6038         return err;
6039 }
6040
6041 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6042                                       struct smb2_read_req *req, void *data_buf,
6043                                       size_t length)
6044 {
6045         struct smb2_buffer_desc_v1 *desc =
6046                 (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6047         int err;
6048
6049         if (work->conn->dialect == SMB30_PROT_ID &&
6050             req->Channel != SMB2_CHANNEL_RDMA_V1)
6051                 return -EINVAL;
6052
6053         if (req->ReadChannelInfoOffset == 0 ||
6054             le16_to_cpu(req->ReadChannelInfoLength) < sizeof(*desc))
6055                 return -EINVAL;
6056
6057         work->need_invalidate_rkey =
6058                 (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6059         work->remote_key = le32_to_cpu(desc->token);
6060
6061         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6062                                     le32_to_cpu(desc->token),
6063                                     le64_to_cpu(desc->offset),
6064                                     le32_to_cpu(desc->length));
6065         if (err)
6066                 return err;
6067
6068         return length;
6069 }
6070
6071 /**
6072  * smb2_read() - handler for smb2 read from file
6073  * @work:       smb work containing read command buffer
6074  *
6075  * Return:      0 on success, otherwise error
6076  */
6077 int smb2_read(struct ksmbd_work *work)
6078 {
6079         struct ksmbd_conn *conn = work->conn;
6080         struct smb2_read_req *req;
6081         struct smb2_read_rsp *rsp, *rsp_org;
6082         struct ksmbd_file *fp;
6083         loff_t offset;
6084         size_t length, mincount;
6085         ssize_t nbytes = 0, remain_bytes = 0;
6086         int err = 0;
6087
6088         rsp_org = work->response_buf;
6089         WORK_BUFFERS(work, req, rsp);
6090
6091         if (test_share_config_flag(work->tcon->share_conf,
6092                                    KSMBD_SHARE_FLAG_PIPE)) {
6093                 ksmbd_debug(SMB, "IPC pipe read request\n");
6094                 return smb2_read_pipe(work);
6095         }
6096
6097         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6098                                   le64_to_cpu(req->PersistentFileId));
6099         if (!fp) {
6100                 err = -ENOENT;
6101                 goto out;
6102         }
6103
6104         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6105                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6106                 err = -EACCES;
6107                 goto out;
6108         }
6109
6110         offset = le64_to_cpu(req->Offset);
6111         length = le32_to_cpu(req->Length);
6112         mincount = le32_to_cpu(req->MinimumCount);
6113
6114         if (length > conn->vals->max_read_size) {
6115                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6116                             conn->vals->max_read_size);
6117                 err = -EINVAL;
6118                 goto out;
6119         }
6120
6121         ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6122                     fp->filp->f_path.dentry, offset, length);
6123
6124         work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6125         if (!work->aux_payload_buf) {
6126                 err = -ENOMEM;
6127                 goto out;
6128         }
6129
6130         nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6131         if (nbytes < 0) {
6132                 err = nbytes;
6133                 goto out;
6134         }
6135
6136         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6137                 kvfree(work->aux_payload_buf);
6138                 work->aux_payload_buf = NULL;
6139                 rsp->hdr.Status = STATUS_END_OF_FILE;
6140                 smb2_set_err_rsp(work);
6141                 ksmbd_fd_put(work, fp);
6142                 return 0;
6143         }
6144
6145         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6146                     nbytes, offset, mincount);
6147
6148         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6149             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6150                 /* write data to the client using rdma channel */
6151                 remain_bytes = smb2_read_rdma_channel(work, req,
6152                                                       work->aux_payload_buf,
6153                                                       nbytes);
6154                 kvfree(work->aux_payload_buf);
6155                 work->aux_payload_buf = NULL;
6156
6157                 nbytes = 0;
6158                 if (remain_bytes < 0) {
6159                         err = (int)remain_bytes;
6160                         goto out;
6161                 }
6162         }
6163
6164         rsp->StructureSize = cpu_to_le16(17);
6165         rsp->DataOffset = 80;
6166         rsp->Reserved = 0;
6167         rsp->DataLength = cpu_to_le32(nbytes);
6168         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6169         rsp->Reserved2 = 0;
6170         inc_rfc1001_len(rsp_org, 16);
6171         work->resp_hdr_sz = get_rfc1002_len(rsp_org) + 4;
6172         work->aux_payload_sz = nbytes;
6173         inc_rfc1001_len(rsp_org, nbytes);
6174         ksmbd_fd_put(work, fp);
6175         return 0;
6176
6177 out:
6178         if (err) {
6179                 if (err == -EISDIR)
6180                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6181                 else if (err == -EAGAIN)
6182                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6183                 else if (err == -ENOENT)
6184                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6185                 else if (err == -EACCES)
6186                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6187                 else if (err == -ESHARE)
6188                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6189                 else if (err == -EINVAL)
6190                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6191                 else
6192                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6193
6194                 smb2_set_err_rsp(work);
6195         }
6196         ksmbd_fd_put(work, fp);
6197         return err;
6198 }
6199
6200 /**
6201  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6202  * @work:       smb work containing write IPC pipe command buffer
6203  *
6204  * Return:      0 on success, otherwise error
6205  */
6206 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6207 {
6208         struct smb2_write_req *req = work->request_buf;
6209         struct smb2_write_rsp *rsp = work->response_buf;
6210         struct ksmbd_rpc_command *rpc_resp;
6211         u64 id = 0;
6212         int err = 0, ret = 0;
6213         char *data_buf;
6214         size_t length;
6215
6216         length = le32_to_cpu(req->Length);
6217         id = le64_to_cpu(req->VolatileFileId);
6218
6219         if (le16_to_cpu(req->DataOffset) ==
6220             (offsetof(struct smb2_write_req, Buffer) - 4)) {
6221                 data_buf = (char *)&req->Buffer[0];
6222         } else {
6223                 if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
6224                     (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
6225                         pr_err("invalid write data offset %u, smb_len %u\n",
6226                                le16_to_cpu(req->DataOffset),
6227                                get_rfc1002_len(req));
6228                         err = -EINVAL;
6229                         goto out;
6230                 }
6231
6232                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6233                                 le16_to_cpu(req->DataOffset));
6234         }
6235
6236         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6237         if (rpc_resp) {
6238                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6239                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6240                         kvfree(rpc_resp);
6241                         smb2_set_err_rsp(work);
6242                         return -EOPNOTSUPP;
6243                 }
6244                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6245                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6246                         smb2_set_err_rsp(work);
6247                         kvfree(rpc_resp);
6248                         return ret;
6249                 }
6250                 kvfree(rpc_resp);
6251         }
6252
6253         rsp->StructureSize = cpu_to_le16(17);
6254         rsp->DataOffset = 0;
6255         rsp->Reserved = 0;
6256         rsp->DataLength = cpu_to_le32(length);
6257         rsp->DataRemaining = 0;
6258         rsp->Reserved2 = 0;
6259         inc_rfc1001_len(rsp, 16);
6260         return 0;
6261 out:
6262         if (err) {
6263                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6264                 smb2_set_err_rsp(work);
6265         }
6266
6267         return err;
6268 }
6269
6270 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6271                                        struct smb2_write_req *req,
6272                                        struct ksmbd_file *fp,
6273                                        loff_t offset, size_t length, bool sync)
6274 {
6275         struct smb2_buffer_desc_v1 *desc;
6276         char *data_buf;
6277         int ret;
6278         ssize_t nbytes;
6279
6280         desc = (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6281
6282         if (work->conn->dialect == SMB30_PROT_ID &&
6283             req->Channel != SMB2_CHANNEL_RDMA_V1)
6284                 return -EINVAL;
6285
6286         if (req->Length != 0 || req->DataOffset != 0)
6287                 return -EINVAL;
6288
6289         if (req->WriteChannelInfoOffset == 0 ||
6290             le16_to_cpu(req->WriteChannelInfoLength) < sizeof(*desc))
6291                 return -EINVAL;
6292
6293         work->need_invalidate_rkey =
6294                 (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6295         work->remote_key = le32_to_cpu(desc->token);
6296
6297         data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6298         if (!data_buf)
6299                 return -ENOMEM;
6300
6301         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6302                                    le32_to_cpu(desc->token),
6303                                    le64_to_cpu(desc->offset),
6304                                    le32_to_cpu(desc->length));
6305         if (ret < 0) {
6306                 kvfree(data_buf);
6307                 return ret;
6308         }
6309
6310         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6311         kvfree(data_buf);
6312         if (ret < 0)
6313                 return ret;
6314
6315         return nbytes;
6316 }
6317
6318 /**
6319  * smb2_write() - handler for smb2 write from file
6320  * @work:       smb work containing write command buffer
6321  *
6322  * Return:      0 on success, otherwise error
6323  */
6324 int smb2_write(struct ksmbd_work *work)
6325 {
6326         struct smb2_write_req *req;
6327         struct smb2_write_rsp *rsp, *rsp_org;
6328         struct ksmbd_file *fp = NULL;
6329         loff_t offset;
6330         size_t length;
6331         ssize_t nbytes;
6332         char *data_buf;
6333         bool writethrough = false;
6334         int err = 0;
6335
6336         rsp_org = work->response_buf;
6337         WORK_BUFFERS(work, req, rsp);
6338
6339         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6340                 ksmbd_debug(SMB, "IPC pipe write request\n");
6341                 return smb2_write_pipe(work);
6342         }
6343
6344         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6345                 ksmbd_debug(SMB, "User does not have write permission\n");
6346                 err = -EACCES;
6347                 goto out;
6348         }
6349
6350         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6351                                   le64_to_cpu(req->PersistentFileId));
6352         if (!fp) {
6353                 err = -ENOENT;
6354                 goto out;
6355         }
6356
6357         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6358                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6359                 err = -EACCES;
6360                 goto out;
6361         }
6362
6363         offset = le64_to_cpu(req->Offset);
6364         length = le32_to_cpu(req->Length);
6365
6366         if (length > work->conn->vals->max_write_size) {
6367                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6368                             work->conn->vals->max_write_size);
6369                 err = -EINVAL;
6370                 goto out;
6371         }
6372
6373         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6374                 writethrough = true;
6375
6376         if (req->Channel != SMB2_CHANNEL_RDMA_V1 &&
6377             req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6378                 if (le16_to_cpu(req->DataOffset) ==
6379                     (offsetof(struct smb2_write_req, Buffer) - 4)) {
6380                         data_buf = (char *)&req->Buffer[0];
6381                 } else {
6382                         if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
6383                             (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
6384                                 pr_err("invalid write data offset %u, smb_len %u\n",
6385                                        le16_to_cpu(req->DataOffset),
6386                                        get_rfc1002_len(req));
6387                                 err = -EINVAL;
6388                                 goto out;
6389                         }
6390
6391                         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6392                                         le16_to_cpu(req->DataOffset));
6393                 }
6394
6395                 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6396                 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6397                         writethrough = true;
6398
6399                 ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6400                             fp->filp->f_path.dentry, offset, length);
6401                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6402                                       writethrough, &nbytes);
6403                 if (err < 0)
6404                         goto out;
6405         } else {
6406                 /* read data from the client using rdma channel, and
6407                  * write the data.
6408                  */
6409                 nbytes = smb2_write_rdma_channel(work, req, fp, offset,
6410                                                  le32_to_cpu(req->RemainingBytes),
6411                                                  writethrough);
6412                 if (nbytes < 0) {
6413                         err = (int)nbytes;
6414                         goto out;
6415                 }
6416         }
6417
6418         rsp->StructureSize = cpu_to_le16(17);
6419         rsp->DataOffset = 0;
6420         rsp->Reserved = 0;
6421         rsp->DataLength = cpu_to_le32(nbytes);
6422         rsp->DataRemaining = 0;
6423         rsp->Reserved2 = 0;
6424         inc_rfc1001_len(rsp_org, 16);
6425         ksmbd_fd_put(work, fp);
6426         return 0;
6427
6428 out:
6429         if (err == -EAGAIN)
6430                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6431         else if (err == -ENOSPC || err == -EFBIG)
6432                 rsp->hdr.Status = STATUS_DISK_FULL;
6433         else if (err == -ENOENT)
6434                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6435         else if (err == -EACCES)
6436                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6437         else if (err == -ESHARE)
6438                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6439         else if (err == -EINVAL)
6440                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6441         else
6442                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6443
6444         smb2_set_err_rsp(work);
6445         ksmbd_fd_put(work, fp);
6446         return err;
6447 }
6448
6449 /**
6450  * smb2_flush() - handler for smb2 flush file - fsync
6451  * @work:       smb work containing flush command buffer
6452  *
6453  * Return:      0 on success, otherwise error
6454  */
6455 int smb2_flush(struct ksmbd_work *work)
6456 {
6457         struct smb2_flush_req *req;
6458         struct smb2_flush_rsp *rsp, *rsp_org;
6459         int err;
6460
6461         rsp_org = work->response_buf;
6462         WORK_BUFFERS(work, req, rsp);
6463
6464         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n",
6465                     le64_to_cpu(req->VolatileFileId));
6466
6467         err = ksmbd_vfs_fsync(work,
6468                               le64_to_cpu(req->VolatileFileId),
6469                               le64_to_cpu(req->PersistentFileId));
6470         if (err)
6471                 goto out;
6472
6473         rsp->StructureSize = cpu_to_le16(4);
6474         rsp->Reserved = 0;
6475         inc_rfc1001_len(rsp_org, 4);
6476         return 0;
6477
6478 out:
6479         if (err) {
6480                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6481                 smb2_set_err_rsp(work);
6482         }
6483
6484         return err;
6485 }
6486
6487 /**
6488  * smb2_cancel() - handler for smb2 cancel command
6489  * @work:       smb work containing cancel command buffer
6490  *
6491  * Return:      0 on success, otherwise error
6492  */
6493 int smb2_cancel(struct ksmbd_work *work)
6494 {
6495         struct ksmbd_conn *conn = work->conn;
6496         struct smb2_hdr *hdr = work->request_buf;
6497         struct smb2_hdr *chdr;
6498         struct ksmbd_work *cancel_work = NULL;
6499         int canceled = 0;
6500         struct list_head *command_list;
6501
6502         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6503                     hdr->MessageId, hdr->Flags);
6504
6505         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6506                 command_list = &conn->async_requests;
6507
6508                 spin_lock(&conn->request_lock);
6509                 list_for_each_entry(cancel_work, command_list,
6510                                     async_request_entry) {
6511                         chdr = cancel_work->request_buf;
6512
6513                         if (cancel_work->async_id !=
6514                             le64_to_cpu(hdr->Id.AsyncId))
6515                                 continue;
6516
6517                         ksmbd_debug(SMB,
6518                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6519                                     le64_to_cpu(hdr->Id.AsyncId),
6520                                     le16_to_cpu(chdr->Command));
6521                         canceled = 1;
6522                         break;
6523                 }
6524                 spin_unlock(&conn->request_lock);
6525         } else {
6526                 command_list = &conn->requests;
6527
6528                 spin_lock(&conn->request_lock);
6529                 list_for_each_entry(cancel_work, command_list, request_entry) {
6530                         chdr = cancel_work->request_buf;
6531
6532                         if (chdr->MessageId != hdr->MessageId ||
6533                             cancel_work == work)
6534                                 continue;
6535
6536                         ksmbd_debug(SMB,
6537                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6538                                     le64_to_cpu(hdr->MessageId),
6539                                     le16_to_cpu(chdr->Command));
6540                         canceled = 1;
6541                         break;
6542                 }
6543                 spin_unlock(&conn->request_lock);
6544         }
6545
6546         if (canceled) {
6547                 cancel_work->state = KSMBD_WORK_CANCELLED;
6548                 if (cancel_work->cancel_fn)
6549                         cancel_work->cancel_fn(cancel_work->cancel_argv);
6550         }
6551
6552         /* For SMB2_CANCEL command itself send no response*/
6553         work->send_no_response = 1;
6554         return 0;
6555 }
6556
6557 struct file_lock *smb_flock_init(struct file *f)
6558 {
6559         struct file_lock *fl;
6560
6561         fl = locks_alloc_lock();
6562         if (!fl)
6563                 goto out;
6564
6565         locks_init_lock(fl);
6566
6567         fl->fl_owner = f;
6568         fl->fl_pid = current->tgid;
6569         fl->fl_file = f;
6570         fl->fl_flags = FL_POSIX;
6571         fl->fl_ops = NULL;
6572         fl->fl_lmops = NULL;
6573
6574 out:
6575         return fl;
6576 }
6577
6578 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6579 {
6580         int cmd = -EINVAL;
6581
6582         /* Checking for wrong flag combination during lock request*/
6583         switch (flags) {
6584         case SMB2_LOCKFLAG_SHARED:
6585                 ksmbd_debug(SMB, "received shared request\n");
6586                 cmd = F_SETLKW;
6587                 flock->fl_type = F_RDLCK;
6588                 flock->fl_flags |= FL_SLEEP;
6589                 break;
6590         case SMB2_LOCKFLAG_EXCLUSIVE:
6591                 ksmbd_debug(SMB, "received exclusive request\n");
6592                 cmd = F_SETLKW;
6593                 flock->fl_type = F_WRLCK;
6594                 flock->fl_flags |= FL_SLEEP;
6595                 break;
6596         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6597                 ksmbd_debug(SMB,
6598                             "received shared & fail immediately request\n");
6599                 cmd = F_SETLK;
6600                 flock->fl_type = F_RDLCK;
6601                 break;
6602         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6603                 ksmbd_debug(SMB,
6604                             "received exclusive & fail immediately request\n");
6605                 cmd = F_SETLK;
6606                 flock->fl_type = F_WRLCK;
6607                 break;
6608         case SMB2_LOCKFLAG_UNLOCK:
6609                 ksmbd_debug(SMB, "received unlock request\n");
6610                 flock->fl_type = F_UNLCK;
6611                 cmd = 0;
6612                 break;
6613         }
6614
6615         return cmd;
6616 }
6617
6618 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6619                                          unsigned int cmd, int flags,
6620                                          struct list_head *lock_list)
6621 {
6622         struct ksmbd_lock *lock;
6623
6624         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6625         if (!lock)
6626                 return NULL;
6627
6628         lock->cmd = cmd;
6629         lock->fl = flock;
6630         lock->start = flock->fl_start;
6631         lock->end = flock->fl_end;
6632         lock->flags = flags;
6633         if (lock->start == lock->end)
6634                 lock->zero_len = 1;
6635         INIT_LIST_HEAD(&lock->clist);
6636         INIT_LIST_HEAD(&lock->flist);
6637         INIT_LIST_HEAD(&lock->llist);
6638         list_add_tail(&lock->llist, lock_list);
6639
6640         return lock;
6641 }
6642
6643 static void smb2_remove_blocked_lock(void **argv)
6644 {
6645         struct file_lock *flock = (struct file_lock *)argv[0];
6646
6647         ksmbd_vfs_posix_lock_unblock(flock);
6648         wake_up(&flock->fl_wait);
6649 }
6650
6651 static inline bool lock_defer_pending(struct file_lock *fl)
6652 {
6653         /* check pending lock waiters */
6654         return waitqueue_active(&fl->fl_wait);
6655 }
6656
6657 /**
6658  * smb2_lock() - handler for smb2 file lock command
6659  * @work:       smb work containing lock command buffer
6660  *
6661  * Return:      0 on success, otherwise error
6662  */
6663 int smb2_lock(struct ksmbd_work *work)
6664 {
6665         struct smb2_lock_req *req = work->request_buf;
6666         struct smb2_lock_rsp *rsp = work->response_buf;
6667         struct smb2_lock_element *lock_ele;
6668         struct ksmbd_file *fp = NULL;
6669         struct file_lock *flock = NULL;
6670         struct file *filp = NULL;
6671         int lock_count;
6672         int flags = 0;
6673         int cmd = 0;
6674         int err = -EIO, i, rc = 0;
6675         u64 lock_start, lock_length;
6676         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6677         struct ksmbd_conn *conn;
6678         int nolock = 0;
6679         LIST_HEAD(lock_list);
6680         LIST_HEAD(rollback_list);
6681         int prior_lock = 0;
6682
6683         ksmbd_debug(SMB, "Received lock request\n");
6684         fp = ksmbd_lookup_fd_slow(work,
6685                                   le64_to_cpu(req->VolatileFileId),
6686                                   le64_to_cpu(req->PersistentFileId));
6687         if (!fp) {
6688                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n",
6689                             le64_to_cpu(req->VolatileFileId));
6690                 err = -ENOENT;
6691                 goto out2;
6692         }
6693
6694         filp = fp->filp;
6695         lock_count = le16_to_cpu(req->LockCount);
6696         lock_ele = req->locks;
6697
6698         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6699         if (!lock_count) {
6700                 err = -EINVAL;
6701                 goto out2;
6702         }
6703
6704         for (i = 0; i < lock_count; i++) {
6705                 flags = le32_to_cpu(lock_ele[i].Flags);
6706
6707                 flock = smb_flock_init(filp);
6708                 if (!flock)
6709                         goto out;
6710
6711                 cmd = smb2_set_flock_flags(flock, flags);
6712
6713                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6714                 lock_length = le64_to_cpu(lock_ele[i].Length);
6715                 if (lock_start > U64_MAX - lock_length) {
6716                         pr_err("Invalid lock range requested\n");
6717                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6718                         goto out;
6719                 }
6720
6721                 if (lock_start > OFFSET_MAX)
6722                         flock->fl_start = OFFSET_MAX;
6723                 else
6724                         flock->fl_start = lock_start;
6725
6726                 lock_length = le64_to_cpu(lock_ele[i].Length);
6727                 if (lock_length > OFFSET_MAX - flock->fl_start)
6728                         lock_length = OFFSET_MAX - flock->fl_start;
6729
6730                 flock->fl_end = flock->fl_start + lock_length;
6731
6732                 if (flock->fl_end < flock->fl_start) {
6733                         ksmbd_debug(SMB,
6734                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6735                                     flock->fl_end, flock->fl_start);
6736                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6737                         goto out;
6738                 }
6739
6740                 /* Check conflict locks in one request */
6741                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6742                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6743                             cmp_lock->fl->fl_end >= flock->fl_end) {
6744                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6745                                     flock->fl_type != F_UNLCK) {
6746                                         pr_err("conflict two locks in one request\n");
6747                                         err = -EINVAL;
6748                                         goto out;
6749                                 }
6750                         }
6751                 }
6752
6753                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6754                 if (!smb_lock) {
6755                         err = -EINVAL;
6756                         goto out;
6757                 }
6758         }
6759
6760         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6761                 if (smb_lock->cmd < 0) {
6762                         err = -EINVAL;
6763                         goto out;
6764                 }
6765
6766                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6767                         err = -EINVAL;
6768                         goto out;
6769                 }
6770
6771                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6772                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6773                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6774                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6775                         err = -EINVAL;
6776                         goto out;
6777                 }
6778
6779                 prior_lock = smb_lock->flags;
6780
6781                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6782                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6783                         goto no_check_cl;
6784
6785                 nolock = 1;
6786                 /* check locks in connection list */
6787                 read_lock(&conn_list_lock);
6788                 list_for_each_entry(conn, &conn_list, conns_list) {
6789                         spin_lock(&conn->llist_lock);
6790                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6791                                 if (file_inode(cmp_lock->fl->fl_file) !=
6792                                     file_inode(smb_lock->fl->fl_file))
6793                                         continue;
6794
6795                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6796                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6797                                             cmp_lock->start == smb_lock->start &&
6798                                             cmp_lock->end == smb_lock->end &&
6799                                             !lock_defer_pending(cmp_lock->fl)) {
6800                                                 nolock = 0;
6801                                                 list_del(&cmp_lock->flist);
6802                                                 list_del(&cmp_lock->clist);
6803                                                 spin_unlock(&conn->llist_lock);
6804                                                 read_unlock(&conn_list_lock);
6805
6806                                                 locks_free_lock(cmp_lock->fl);
6807                                                 kfree(cmp_lock);
6808                                                 goto out_check_cl;
6809                                         }
6810                                         continue;
6811                                 }
6812
6813                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6814                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6815                                                 continue;
6816                                 } else {
6817                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6818                                                 continue;
6819                                 }
6820
6821                                 /* check zero byte lock range */
6822                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6823                                     cmp_lock->start > smb_lock->start &&
6824                                     cmp_lock->start < smb_lock->end) {
6825                                         spin_unlock(&conn->llist_lock);
6826                                         read_unlock(&conn_list_lock);
6827                                         pr_err("previous lock conflict with zero byte lock range\n");
6828                                         goto out;
6829                                 }
6830
6831                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6832                                     smb_lock->start > cmp_lock->start &&
6833                                     smb_lock->start < cmp_lock->end) {
6834                                         spin_unlock(&conn->llist_lock);
6835                                         read_unlock(&conn_list_lock);
6836                                         pr_err("current lock conflict with zero byte lock range\n");
6837                                         goto out;
6838                                 }
6839
6840                                 if (((cmp_lock->start <= smb_lock->start &&
6841                                       cmp_lock->end > smb_lock->start) ||
6842                                      (cmp_lock->start < smb_lock->end &&
6843                                       cmp_lock->end >= smb_lock->end)) &&
6844                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6845                                         spin_unlock(&conn->llist_lock);
6846                                         read_unlock(&conn_list_lock);
6847                                         pr_err("Not allow lock operation on exclusive lock range\n");
6848                                         goto out;
6849                                 }
6850                         }
6851                         spin_unlock(&conn->llist_lock);
6852                 }
6853                 read_unlock(&conn_list_lock);
6854 out_check_cl:
6855                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
6856                         pr_err("Try to unlock nolocked range\n");
6857                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
6858                         goto out;
6859                 }
6860
6861 no_check_cl:
6862                 if (smb_lock->zero_len) {
6863                         err = 0;
6864                         goto skip;
6865                 }
6866
6867                 flock = smb_lock->fl;
6868                 list_del(&smb_lock->llist);
6869 retry:
6870                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
6871 skip:
6872                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
6873                         if (!rc) {
6874                                 ksmbd_debug(SMB, "File unlocked\n");
6875                         } else if (rc == -ENOENT) {
6876                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
6877                                 goto out;
6878                         }
6879                         locks_free_lock(flock);
6880                         kfree(smb_lock);
6881                 } else {
6882                         if (rc == FILE_LOCK_DEFERRED) {
6883                                 void **argv;
6884
6885                                 ksmbd_debug(SMB,
6886                                             "would have to wait for getting lock\n");
6887                                 spin_lock(&work->conn->llist_lock);
6888                                 list_add_tail(&smb_lock->clist,
6889                                               &work->conn->lock_list);
6890                                 spin_unlock(&work->conn->llist_lock);
6891                                 list_add(&smb_lock->llist, &rollback_list);
6892
6893                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
6894                                 if (!argv) {
6895                                         err = -ENOMEM;
6896                                         goto out;
6897                                 }
6898                                 argv[0] = flock;
6899
6900                                 rc = setup_async_work(work,
6901                                                       smb2_remove_blocked_lock,
6902                                                       argv);
6903                                 if (rc) {
6904                                         err = -ENOMEM;
6905                                         goto out;
6906                                 }
6907                                 spin_lock(&fp->f_lock);
6908                                 list_add(&work->fp_entry, &fp->blocked_works);
6909                                 spin_unlock(&fp->f_lock);
6910
6911                                 smb2_send_interim_resp(work, STATUS_PENDING);
6912
6913                                 ksmbd_vfs_posix_lock_wait(flock);
6914
6915                                 if (work->state != KSMBD_WORK_ACTIVE) {
6916                                         list_del(&smb_lock->llist);
6917                                         spin_lock(&work->conn->llist_lock);
6918                                         list_del(&smb_lock->clist);
6919                                         spin_unlock(&work->conn->llist_lock);
6920                                         locks_free_lock(flock);
6921
6922                                         if (work->state == KSMBD_WORK_CANCELLED) {
6923                                                 spin_lock(&fp->f_lock);
6924                                                 list_del(&work->fp_entry);
6925                                                 spin_unlock(&fp->f_lock);
6926                                                 rsp->hdr.Status =
6927                                                         STATUS_CANCELLED;
6928                                                 kfree(smb_lock);
6929                                                 smb2_send_interim_resp(work,
6930                                                                        STATUS_CANCELLED);
6931                                                 work->send_no_response = 1;
6932                                                 goto out;
6933                                         }
6934                                         init_smb2_rsp_hdr(work);
6935                                         smb2_set_err_rsp(work);
6936                                         rsp->hdr.Status =
6937                                                 STATUS_RANGE_NOT_LOCKED;
6938                                         kfree(smb_lock);
6939                                         goto out2;
6940                                 }
6941
6942                                 list_del(&smb_lock->llist);
6943                                 spin_lock(&work->conn->llist_lock);
6944                                 list_del(&smb_lock->clist);
6945                                 spin_unlock(&work->conn->llist_lock);
6946
6947                                 spin_lock(&fp->f_lock);
6948                                 list_del(&work->fp_entry);
6949                                 spin_unlock(&fp->f_lock);
6950                                 goto retry;
6951                         } else if (!rc) {
6952                                 spin_lock(&work->conn->llist_lock);
6953                                 list_add_tail(&smb_lock->clist,
6954                                               &work->conn->lock_list);
6955                                 list_add_tail(&smb_lock->flist,
6956                                               &fp->lock_list);
6957                                 spin_unlock(&work->conn->llist_lock);
6958                                 list_add(&smb_lock->llist, &rollback_list);
6959                                 ksmbd_debug(SMB, "successful in taking lock\n");
6960                         } else {
6961                                 goto out;
6962                         }
6963                 }
6964         }
6965
6966         if (atomic_read(&fp->f_ci->op_count) > 1)
6967                 smb_break_all_oplock(work, fp);
6968
6969         rsp->StructureSize = cpu_to_le16(4);
6970         ksmbd_debug(SMB, "successful in taking lock\n");
6971         rsp->hdr.Status = STATUS_SUCCESS;
6972         rsp->Reserved = 0;
6973         inc_rfc1001_len(rsp, 4);
6974         ksmbd_fd_put(work, fp);
6975         return 0;
6976
6977 out:
6978         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6979                 locks_free_lock(smb_lock->fl);
6980                 list_del(&smb_lock->llist);
6981                 kfree(smb_lock);
6982         }
6983
6984         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
6985                 struct file_lock *rlock = NULL;
6986
6987                 rlock = smb_flock_init(filp);
6988                 rlock->fl_type = F_UNLCK;
6989                 rlock->fl_start = smb_lock->start;
6990                 rlock->fl_end = smb_lock->end;
6991
6992                 rc = vfs_lock_file(filp, 0, rlock, NULL);
6993                 if (rc)
6994                         pr_err("rollback unlock fail : %d\n", rc);
6995
6996                 list_del(&smb_lock->llist);
6997                 spin_lock(&work->conn->llist_lock);
6998                 if (!list_empty(&smb_lock->flist))
6999                         list_del(&smb_lock->flist);
7000                 list_del(&smb_lock->clist);
7001                 spin_unlock(&work->conn->llist_lock);
7002
7003                 locks_free_lock(smb_lock->fl);
7004                 locks_free_lock(rlock);
7005                 kfree(smb_lock);
7006         }
7007 out2:
7008         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7009
7010         if (!rsp->hdr.Status) {
7011                 if (err == -EINVAL)
7012                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7013                 else if (err == -ENOMEM)
7014                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7015                 else if (err == -ENOENT)
7016                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7017                 else
7018                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7019         }
7020
7021         smb2_set_err_rsp(work);
7022         ksmbd_fd_put(work, fp);
7023         return err;
7024 }
7025
7026 static int fsctl_copychunk(struct ksmbd_work *work, struct smb2_ioctl_req *req,
7027                            struct smb2_ioctl_rsp *rsp)
7028 {
7029         struct copychunk_ioctl_req *ci_req;
7030         struct copychunk_ioctl_rsp *ci_rsp;
7031         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7032         struct srv_copychunk *chunks;
7033         unsigned int i, chunk_count, chunk_count_written = 0;
7034         unsigned int chunk_size_written = 0;
7035         loff_t total_size_written = 0;
7036         int ret, cnt_code;
7037
7038         cnt_code = le32_to_cpu(req->CntCode);
7039         ci_req = (struct copychunk_ioctl_req *)&req->Buffer[0];
7040         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7041
7042         rsp->VolatileFileId = req->VolatileFileId;
7043         rsp->PersistentFileId = req->PersistentFileId;
7044         ci_rsp->ChunksWritten =
7045                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7046         ci_rsp->ChunkBytesWritten =
7047                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7048         ci_rsp->TotalBytesWritten =
7049                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7050
7051         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7052         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7053         total_size_written = 0;
7054
7055         /* verify the SRV_COPYCHUNK_COPY packet */
7056         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7057             le32_to_cpu(req->InputCount) <
7058              offsetof(struct copychunk_ioctl_req, Chunks) +
7059              chunk_count * sizeof(struct srv_copychunk)) {
7060                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7061                 return -EINVAL;
7062         }
7063
7064         for (i = 0; i < chunk_count; i++) {
7065                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7066                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7067                         break;
7068                 total_size_written += le32_to_cpu(chunks[i].Length);
7069         }
7070
7071         if (i < chunk_count ||
7072             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7073                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7074                 return -EINVAL;
7075         }
7076
7077         src_fp = ksmbd_lookup_foreign_fd(work,
7078                                          le64_to_cpu(ci_req->ResumeKey[0]));
7079         dst_fp = ksmbd_lookup_fd_slow(work,
7080                                       le64_to_cpu(req->VolatileFileId),
7081                                       le64_to_cpu(req->PersistentFileId));
7082         ret = -EINVAL;
7083         if (!src_fp ||
7084             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7085                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7086                 goto out;
7087         }
7088
7089         if (!dst_fp) {
7090                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7091                 goto out;
7092         }
7093
7094         /*
7095          * FILE_READ_DATA should only be included in
7096          * the FSCTL_COPYCHUNK case
7097          */
7098         if (cnt_code == FSCTL_COPYCHUNK &&
7099             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7100                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7101                 goto out;
7102         }
7103
7104         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7105                                          chunks, chunk_count,
7106                                          &chunk_count_written,
7107                                          &chunk_size_written,
7108                                          &total_size_written);
7109         if (ret < 0) {
7110                 if (ret == -EACCES)
7111                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7112                 if (ret == -EAGAIN)
7113                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7114                 else if (ret == -EBADF)
7115                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7116                 else if (ret == -EFBIG || ret == -ENOSPC)
7117                         rsp->hdr.Status = STATUS_DISK_FULL;
7118                 else if (ret == -EINVAL)
7119                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7120                 else if (ret == -EISDIR)
7121                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7122                 else if (ret == -E2BIG)
7123                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7124                 else
7125                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7126         }
7127
7128         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7129         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7130         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7131 out:
7132         ksmbd_fd_put(work, src_fp);
7133         ksmbd_fd_put(work, dst_fp);
7134         return ret;
7135 }
7136
7137 static __be32 idev_ipv4_address(struct in_device *idev)
7138 {
7139         __be32 addr = 0;
7140
7141         struct in_ifaddr *ifa;
7142
7143         rcu_read_lock();
7144         in_dev_for_each_ifa_rcu(ifa, idev) {
7145                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7146                         continue;
7147
7148                 addr = ifa->ifa_address;
7149                 break;
7150         }
7151         rcu_read_unlock();
7152         return addr;
7153 }
7154
7155 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7156                                         struct smb2_ioctl_req *req,
7157                                         struct smb2_ioctl_rsp *rsp)
7158 {
7159         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7160         int nbytes = 0;
7161         struct net_device *netdev;
7162         struct sockaddr_storage_rsp *sockaddr_storage;
7163         unsigned int flags;
7164         unsigned long long speed;
7165         struct sockaddr_in6 *csin6 = (struct sockaddr_in6 *)&conn->peer_addr;
7166
7167         rtnl_lock();
7168         for_each_netdev(&init_net, netdev) {
7169                 if (netdev->type == ARPHRD_LOOPBACK)
7170                         continue;
7171
7172                 flags = dev_get_flags(netdev);
7173                 if (!(flags & IFF_RUNNING))
7174                         continue;
7175
7176                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7177                                 &rsp->Buffer[nbytes];
7178                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7179
7180                 nii_rsp->Capability = 0;
7181                 if (ksmbd_rdma_capable_netdev(netdev))
7182                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7183
7184                 nii_rsp->Next = cpu_to_le32(152);
7185                 nii_rsp->Reserved = 0;
7186
7187                 if (netdev->ethtool_ops->get_link_ksettings) {
7188                         struct ethtool_link_ksettings cmd;
7189
7190                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7191                         speed = cmd.base.speed;
7192                 } else {
7193                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7194                                     "speed is unknown, defaulting to 1Gb/sec");
7195                         speed = SPEED_1000;
7196                 }
7197
7198                 speed *= 1000000;
7199                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7200
7201                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7202                                         nii_rsp->SockAddr_Storage;
7203                 memset(sockaddr_storage, 0, 128);
7204
7205                 if (conn->peer_addr.ss_family == PF_INET ||
7206                     ipv6_addr_v4mapped(&csin6->sin6_addr)) {
7207                         struct in_device *idev;
7208
7209                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7210                         sockaddr_storage->addr4.Port = 0;
7211
7212                         idev = __in_dev_get_rtnl(netdev);
7213                         if (!idev)
7214                                 continue;
7215                         sockaddr_storage->addr4.IPv4address =
7216                                                 idev_ipv4_address(idev);
7217                 } else {
7218                         struct inet6_dev *idev6;
7219                         struct inet6_ifaddr *ifa;
7220                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7221
7222                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7223                         sockaddr_storage->addr6.Port = 0;
7224                         sockaddr_storage->addr6.FlowInfo = 0;
7225
7226                         idev6 = __in6_dev_get(netdev);
7227                         if (!idev6)
7228                                 continue;
7229
7230                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7231                                 if (ifa->flags & (IFA_F_TENTATIVE |
7232                                                         IFA_F_DEPRECATED))
7233                                         continue;
7234                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7235                                 break;
7236                         }
7237                         sockaddr_storage->addr6.ScopeId = 0;
7238                 }
7239
7240                 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7241         }
7242         rtnl_unlock();
7243
7244         /* zero if this is last one */
7245         if (nii_rsp)
7246                 nii_rsp->Next = 0;
7247
7248         if (!nbytes) {
7249                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7250                 return -EINVAL;
7251         }
7252
7253         rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7254         rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7255         return nbytes;
7256 }
7257
7258 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7259                                          struct validate_negotiate_info_req *neg_req,
7260                                          struct validate_negotiate_info_rsp *neg_rsp)
7261 {
7262         int ret = 0;
7263         int dialect;
7264
7265         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7266                                              neg_req->DialectCount);
7267         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7268                 ret = -EINVAL;
7269                 goto err_out;
7270         }
7271
7272         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7273                 ret = -EINVAL;
7274                 goto err_out;
7275         }
7276
7277         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7278                 ret = -EINVAL;
7279                 goto err_out;
7280         }
7281
7282         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7283                 ret = -EINVAL;
7284                 goto err_out;
7285         }
7286
7287         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7288         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7289         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7290         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7291 err_out:
7292         return ret;
7293 }
7294
7295 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7296                                         struct file_allocated_range_buffer *qar_req,
7297                                         struct file_allocated_range_buffer *qar_rsp,
7298                                         int in_count, int *out_count)
7299 {
7300         struct ksmbd_file *fp;
7301         loff_t start, length;
7302         int ret = 0;
7303
7304         *out_count = 0;
7305         if (in_count == 0)
7306                 return -EINVAL;
7307
7308         fp = ksmbd_lookup_fd_fast(work, id);
7309         if (!fp)
7310                 return -ENOENT;
7311
7312         start = le64_to_cpu(qar_req->file_offset);
7313         length = le64_to_cpu(qar_req->length);
7314
7315         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7316                                    qar_rsp, in_count, out_count);
7317         if (ret && ret != -E2BIG)
7318                 *out_count = 0;
7319
7320         ksmbd_fd_put(work, fp);
7321         return ret;
7322 }
7323
7324 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7325                                  int out_buf_len, struct smb2_ioctl_req *req,
7326                                  struct smb2_ioctl_rsp *rsp)
7327 {
7328         struct ksmbd_rpc_command *rpc_resp;
7329         char *data_buf = (char *)&req->Buffer[0];
7330         int nbytes = 0;
7331
7332         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7333                                    le32_to_cpu(req->InputCount));
7334         if (rpc_resp) {
7335                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7336                         /*
7337                          * set STATUS_SOME_NOT_MAPPED response
7338                          * for unknown domain sid.
7339                          */
7340                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7341                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7342                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7343                         goto out;
7344                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7345                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7346                         goto out;
7347                 }
7348
7349                 nbytes = rpc_resp->payload_sz;
7350                 if (rpc_resp->payload_sz > out_buf_len) {
7351                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7352                         nbytes = out_buf_len;
7353                 }
7354
7355                 if (!rpc_resp->payload_sz) {
7356                         rsp->hdr.Status =
7357                                 STATUS_UNEXPECTED_IO_ERROR;
7358                         goto out;
7359                 }
7360
7361                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7362         }
7363 out:
7364         kvfree(rpc_resp);
7365         return nbytes;
7366 }
7367
7368 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7369                                    struct file_sparse *sparse)
7370 {
7371         struct ksmbd_file *fp;
7372         struct user_namespace *user_ns;
7373         int ret = 0;
7374         __le32 old_fattr;
7375
7376         fp = ksmbd_lookup_fd_fast(work, id);
7377         if (!fp)
7378                 return -ENOENT;
7379         user_ns = file_mnt_user_ns(fp->filp);
7380
7381         old_fattr = fp->f_ci->m_fattr;
7382         if (sparse->SetSparse)
7383                 fp->f_ci->m_fattr |= ATTR_SPARSE_FILE_LE;
7384         else
7385                 fp->f_ci->m_fattr &= ~ATTR_SPARSE_FILE_LE;
7386
7387         if (fp->f_ci->m_fattr != old_fattr &&
7388             test_share_config_flag(work->tcon->share_conf,
7389                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7390                 struct xattr_dos_attrib da;
7391
7392                 ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7393                                                      fp->filp->f_path.dentry, &da);
7394                 if (ret <= 0)
7395                         goto out;
7396
7397                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7398                 ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7399                                                      fp->filp->f_path.dentry, &da);
7400                 if (ret)
7401                         fp->f_ci->m_fattr = old_fattr;
7402         }
7403
7404 out:
7405         ksmbd_fd_put(work, fp);
7406         return ret;
7407 }
7408
7409 static int fsctl_request_resume_key(struct ksmbd_work *work,
7410                                     struct smb2_ioctl_req *req,
7411                                     struct resume_key_ioctl_rsp *key_rsp)
7412 {
7413         struct ksmbd_file *fp;
7414
7415         fp = ksmbd_lookup_fd_slow(work,
7416                                   le64_to_cpu(req->VolatileFileId),
7417                                   le64_to_cpu(req->PersistentFileId));
7418         if (!fp)
7419                 return -ENOENT;
7420
7421         memset(key_rsp, 0, sizeof(*key_rsp));
7422         key_rsp->ResumeKey[0] = req->VolatileFileId;
7423         key_rsp->ResumeKey[1] = req->PersistentFileId;
7424         ksmbd_fd_put(work, fp);
7425
7426         return 0;
7427 }
7428
7429 /**
7430  * smb2_ioctl() - handler for smb2 ioctl command
7431  * @work:       smb work containing ioctl command buffer
7432  *
7433  * Return:      0 on success, otherwise error
7434  */
7435 int smb2_ioctl(struct ksmbd_work *work)
7436 {
7437         struct smb2_ioctl_req *req;
7438         struct smb2_ioctl_rsp *rsp, *rsp_org;
7439         int cnt_code, nbytes = 0;
7440         int out_buf_len;
7441         u64 id = KSMBD_NO_FID;
7442         struct ksmbd_conn *conn = work->conn;
7443         int ret = 0;
7444
7445         rsp_org = work->response_buf;
7446         if (work->next_smb2_rcv_hdr_off) {
7447                 req = ksmbd_req_buf_next(work);
7448                 rsp = ksmbd_resp_buf_next(work);
7449                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
7450                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7451                                     work->compound_fid);
7452                         id = work->compound_fid;
7453                 }
7454         } else {
7455                 req = work->request_buf;
7456                 rsp = work->response_buf;
7457         }
7458
7459         if (!has_file_id(id))
7460                 id = le64_to_cpu(req->VolatileFileId);
7461
7462         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7463                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7464                 goto out;
7465         }
7466
7467         cnt_code = le32_to_cpu(req->CntCode);
7468         out_buf_len = le32_to_cpu(req->MaxOutputResponse);
7469         out_buf_len = min(KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7470
7471         switch (cnt_code) {
7472         case FSCTL_DFS_GET_REFERRALS:
7473         case FSCTL_DFS_GET_REFERRALS_EX:
7474                 /* Not support DFS yet */
7475                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7476                 goto out;
7477         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7478         {
7479                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7480
7481                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7482                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7483                         &rsp->Buffer[0];
7484
7485                 /*
7486                  * TODO: This is dummy implementation to pass smbtorture
7487                  * Need to check correct response later
7488                  */
7489                 memset(obj_buf->ObjectId, 0x0, 16);
7490                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7491                 memset(obj_buf->BirthObjectId, 0x0, 16);
7492                 memset(obj_buf->DomainId, 0x0, 16);
7493
7494                 break;
7495         }
7496         case FSCTL_PIPE_TRANSCEIVE:
7497                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7498                 break;
7499         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7500                 if (conn->dialect < SMB30_PROT_ID) {
7501                         ret = -EOPNOTSUPP;
7502                         goto out;
7503                 }
7504
7505                 ret = fsctl_validate_negotiate_info(conn,
7506                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7507                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0]);
7508                 if (ret < 0)
7509                         goto out;
7510
7511                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7512                 rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7513                 rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7514                 break;
7515         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7516                 nbytes = fsctl_query_iface_info_ioctl(conn, req, rsp);
7517                 if (nbytes < 0)
7518                         goto out;
7519                 break;
7520         case FSCTL_REQUEST_RESUME_KEY:
7521                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7522                         ret = -EINVAL;
7523                         goto out;
7524                 }
7525
7526                 ret = fsctl_request_resume_key(work, req,
7527                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7528                 if (ret < 0)
7529                         goto out;
7530                 rsp->PersistentFileId = req->PersistentFileId;
7531                 rsp->VolatileFileId = req->VolatileFileId;
7532                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7533                 break;
7534         case FSCTL_COPYCHUNK:
7535         case FSCTL_COPYCHUNK_WRITE:
7536                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7537                         ksmbd_debug(SMB,
7538                                     "User does not have write permission\n");
7539                         ret = -EACCES;
7540                         goto out;
7541                 }
7542
7543                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7544                         ret = -EINVAL;
7545                         goto out;
7546                 }
7547
7548                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7549                 fsctl_copychunk(work, req, rsp);
7550                 break;
7551         case FSCTL_SET_SPARSE:
7552                 ret = fsctl_set_sparse(work, id,
7553                                        (struct file_sparse *)&req->Buffer[0]);
7554                 if (ret < 0)
7555                         goto out;
7556                 break;
7557         case FSCTL_SET_ZERO_DATA:
7558         {
7559                 struct file_zero_data_information *zero_data;
7560                 struct ksmbd_file *fp;
7561                 loff_t off, len;
7562
7563                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7564                         ksmbd_debug(SMB,
7565                                     "User does not have write permission\n");
7566                         ret = -EACCES;
7567                         goto out;
7568                 }
7569
7570                 zero_data =
7571                         (struct file_zero_data_information *)&req->Buffer[0];
7572
7573                 fp = ksmbd_lookup_fd_fast(work, id);
7574                 if (!fp) {
7575                         ret = -ENOENT;
7576                         goto out;
7577                 }
7578
7579                 off = le64_to_cpu(zero_data->FileOffset);
7580                 len = le64_to_cpu(zero_data->BeyondFinalZero) - off;
7581
7582                 ret = ksmbd_vfs_zero_data(work, fp, off, len);
7583                 ksmbd_fd_put(work, fp);
7584                 if (ret < 0)
7585                         goto out;
7586                 break;
7587         }
7588         case FSCTL_QUERY_ALLOCATED_RANGES:
7589                 ret = fsctl_query_allocated_ranges(work, id,
7590                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7591                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7592                         out_buf_len /
7593                         sizeof(struct file_allocated_range_buffer), &nbytes);
7594                 if (ret == -E2BIG) {
7595                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7596                 } else if (ret < 0) {
7597                         nbytes = 0;
7598                         goto out;
7599                 }
7600
7601                 nbytes *= sizeof(struct file_allocated_range_buffer);
7602                 break;
7603         case FSCTL_GET_REPARSE_POINT:
7604         {
7605                 struct reparse_data_buffer *reparse_ptr;
7606                 struct ksmbd_file *fp;
7607
7608                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7609                 fp = ksmbd_lookup_fd_fast(work, id);
7610                 if (!fp) {
7611                         pr_err("not found fp!!\n");
7612                         ret = -ENOENT;
7613                         goto out;
7614                 }
7615
7616                 reparse_ptr->ReparseTag =
7617                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7618                 reparse_ptr->ReparseDataLength = 0;
7619                 ksmbd_fd_put(work, fp);
7620                 nbytes = sizeof(struct reparse_data_buffer);
7621                 break;
7622         }
7623         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7624         {
7625                 struct ksmbd_file *fp_in, *fp_out = NULL;
7626                 struct duplicate_extents_to_file *dup_ext;
7627                 loff_t src_off, dst_off, length, cloned;
7628
7629                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7630
7631                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7632                                              dup_ext->PersistentFileHandle);
7633                 if (!fp_in) {
7634                         pr_err("not found file handle in duplicate extent to file\n");
7635                         ret = -ENOENT;
7636                         goto out;
7637                 }
7638
7639                 fp_out = ksmbd_lookup_fd_fast(work, id);
7640                 if (!fp_out) {
7641                         pr_err("not found fp\n");
7642                         ret = -ENOENT;
7643                         goto dup_ext_out;
7644                 }
7645
7646                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7647                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7648                 length = le64_to_cpu(dup_ext->ByteCount);
7649                 cloned = vfs_clone_file_range(fp_in->filp, src_off, fp_out->filp,
7650                                               dst_off, length, 0);
7651                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7652                         ret = -EOPNOTSUPP;
7653                         goto dup_ext_out;
7654                 } else if (cloned != length) {
7655                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7656                                                      fp_out->filp, dst_off, length, 0);
7657                         if (cloned != length) {
7658                                 if (cloned < 0)
7659                                         ret = cloned;
7660                                 else
7661                                         ret = -EINVAL;
7662                         }
7663                 }
7664
7665 dup_ext_out:
7666                 ksmbd_fd_put(work, fp_in);
7667                 ksmbd_fd_put(work, fp_out);
7668                 if (ret < 0)
7669                         goto out;
7670                 break;
7671         }
7672         default:
7673                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7674                             cnt_code);
7675                 ret = -EOPNOTSUPP;
7676                 goto out;
7677         }
7678
7679         rsp->CntCode = cpu_to_le32(cnt_code);
7680         rsp->InputCount = cpu_to_le32(0);
7681         rsp->InputOffset = cpu_to_le32(112);
7682         rsp->OutputOffset = cpu_to_le32(112);
7683         rsp->OutputCount = cpu_to_le32(nbytes);
7684         rsp->StructureSize = cpu_to_le16(49);
7685         rsp->Reserved = cpu_to_le16(0);
7686         rsp->Flags = cpu_to_le32(0);
7687         rsp->Reserved2 = cpu_to_le32(0);
7688         inc_rfc1001_len(rsp_org, 48 + nbytes);
7689
7690         return 0;
7691
7692 out:
7693         if (ret == -EACCES)
7694                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7695         else if (ret == -ENOENT)
7696                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7697         else if (ret == -EOPNOTSUPP)
7698                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7699         else if (ret < 0 || rsp->hdr.Status == 0)
7700                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7701         smb2_set_err_rsp(work);
7702         return 0;
7703 }
7704
7705 /**
7706  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7707  * @work:       smb work containing oplock break command buffer
7708  *
7709  * Return:      0
7710  */
7711 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7712 {
7713         struct smb2_oplock_break *req = work->request_buf;
7714         struct smb2_oplock_break *rsp = work->response_buf;
7715         struct ksmbd_file *fp;
7716         struct oplock_info *opinfo = NULL;
7717         __le32 err = 0;
7718         int ret = 0;
7719         u64 volatile_id, persistent_id;
7720         char req_oplevel = 0, rsp_oplevel = 0;
7721         unsigned int oplock_change_type;
7722
7723         volatile_id = le64_to_cpu(req->VolatileFid);
7724         persistent_id = le64_to_cpu(req->PersistentFid);
7725         req_oplevel = req->OplockLevel;
7726         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7727                     volatile_id, persistent_id, req_oplevel);
7728
7729         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7730         if (!fp) {
7731                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7732                 smb2_set_err_rsp(work);
7733                 return;
7734         }
7735
7736         opinfo = opinfo_get(fp);
7737         if (!opinfo) {
7738                 pr_err("unexpected null oplock_info\n");
7739                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7740                 smb2_set_err_rsp(work);
7741                 ksmbd_fd_put(work, fp);
7742                 return;
7743         }
7744
7745         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7746                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7747                 goto err_out;
7748         }
7749
7750         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7751                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7752                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7753                 goto err_out;
7754         }
7755
7756         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7757              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7758             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7759              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7760                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7761                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7762         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7763                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7764                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7765                 oplock_change_type = OPLOCK_READ_TO_NONE;
7766         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7767                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7768                 err = STATUS_INVALID_DEVICE_STATE;
7769                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7770                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7771                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7772                         oplock_change_type = OPLOCK_WRITE_TO_READ;
7773                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7774                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7775                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7776                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
7777                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7778                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7779                         oplock_change_type = OPLOCK_READ_TO_NONE;
7780                 } else {
7781                         oplock_change_type = 0;
7782                 }
7783         } else {
7784                 oplock_change_type = 0;
7785         }
7786
7787         switch (oplock_change_type) {
7788         case OPLOCK_WRITE_TO_READ:
7789                 ret = opinfo_write_to_read(opinfo);
7790                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
7791                 break;
7792         case OPLOCK_WRITE_TO_NONE:
7793                 ret = opinfo_write_to_none(opinfo);
7794                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7795                 break;
7796         case OPLOCK_READ_TO_NONE:
7797                 ret = opinfo_read_to_none(opinfo);
7798                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7799                 break;
7800         default:
7801                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
7802                        opinfo->level, rsp_oplevel);
7803         }
7804
7805         if (ret < 0) {
7806                 rsp->hdr.Status = err;
7807                 goto err_out;
7808         }
7809
7810         opinfo_put(opinfo);
7811         ksmbd_fd_put(work, fp);
7812         opinfo->op_state = OPLOCK_STATE_NONE;
7813         wake_up_interruptible_all(&opinfo->oplock_q);
7814
7815         rsp->StructureSize = cpu_to_le16(24);
7816         rsp->OplockLevel = rsp_oplevel;
7817         rsp->Reserved = 0;
7818         rsp->Reserved2 = 0;
7819         rsp->VolatileFid = cpu_to_le64(volatile_id);
7820         rsp->PersistentFid = cpu_to_le64(persistent_id);
7821         inc_rfc1001_len(rsp, 24);
7822         return;
7823
7824 err_out:
7825         opinfo->op_state = OPLOCK_STATE_NONE;
7826         wake_up_interruptible_all(&opinfo->oplock_q);
7827
7828         opinfo_put(opinfo);
7829         ksmbd_fd_put(work, fp);
7830         smb2_set_err_rsp(work);
7831 }
7832
7833 static int check_lease_state(struct lease *lease, __le32 req_state)
7834 {
7835         if ((lease->new_state ==
7836              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
7837             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
7838                 lease->new_state = req_state;
7839                 return 0;
7840         }
7841
7842         if (lease->new_state == req_state)
7843                 return 0;
7844
7845         return 1;
7846 }
7847
7848 /**
7849  * smb21_lease_break_ack() - handler for smb2.1 lease break command
7850  * @work:       smb work containing lease break command buffer
7851  *
7852  * Return:      0
7853  */
7854 static void smb21_lease_break_ack(struct ksmbd_work *work)
7855 {
7856         struct ksmbd_conn *conn = work->conn;
7857         struct smb2_lease_ack *req = work->request_buf;
7858         struct smb2_lease_ack *rsp = work->response_buf;
7859         struct oplock_info *opinfo;
7860         __le32 err = 0;
7861         int ret = 0;
7862         unsigned int lease_change_type;
7863         __le32 lease_state;
7864         struct lease *lease;
7865
7866         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
7867                     le32_to_cpu(req->LeaseState));
7868         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
7869         if (!opinfo) {
7870                 ksmbd_debug(OPLOCK, "file not opened\n");
7871                 smb2_set_err_rsp(work);
7872                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7873                 return;
7874         }
7875         lease = opinfo->o_lease;
7876
7877         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7878                 pr_err("unexpected lease break state 0x%x\n",
7879                        opinfo->op_state);
7880                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7881                 goto err_out;
7882         }
7883
7884         if (check_lease_state(lease, req->LeaseState)) {
7885                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
7886                 ksmbd_debug(OPLOCK,
7887                             "req lease state: 0x%x, expected state: 0x%x\n",
7888                             req->LeaseState, lease->new_state);
7889                 goto err_out;
7890         }
7891
7892         if (!atomic_read(&opinfo->breaking_cnt)) {
7893                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7894                 goto err_out;
7895         }
7896
7897         /* check for bad lease state */
7898         if (req->LeaseState &
7899             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
7900                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7901                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
7902                         lease_change_type = OPLOCK_WRITE_TO_NONE;
7903                 else
7904                         lease_change_type = OPLOCK_READ_TO_NONE;
7905                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
7906                             le32_to_cpu(lease->state),
7907                             le32_to_cpu(req->LeaseState));
7908         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
7909                    req->LeaseState != SMB2_LEASE_NONE_LE) {
7910                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7911                 lease_change_type = OPLOCK_READ_TO_NONE;
7912                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
7913                             le32_to_cpu(lease->state),
7914                             le32_to_cpu(req->LeaseState));
7915         } else {
7916                 /* valid lease state changes */
7917                 err = STATUS_INVALID_DEVICE_STATE;
7918                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
7919                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
7920                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
7921                         else
7922                                 lease_change_type = OPLOCK_READ_TO_NONE;
7923                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
7924                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
7925                                 lease_change_type = OPLOCK_WRITE_TO_READ;
7926                         else
7927                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
7928                 } else {
7929                         lease_change_type = 0;
7930                 }
7931         }
7932
7933         switch (lease_change_type) {
7934         case OPLOCK_WRITE_TO_READ:
7935                 ret = opinfo_write_to_read(opinfo);
7936                 break;
7937         case OPLOCK_READ_HANDLE_TO_READ:
7938                 ret = opinfo_read_handle_to_read(opinfo);
7939                 break;
7940         case OPLOCK_WRITE_TO_NONE:
7941                 ret = opinfo_write_to_none(opinfo);
7942                 break;
7943         case OPLOCK_READ_TO_NONE:
7944                 ret = opinfo_read_to_none(opinfo);
7945                 break;
7946         default:
7947                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
7948                             le32_to_cpu(lease->state),
7949                             le32_to_cpu(req->LeaseState));
7950         }
7951
7952         lease_state = lease->state;
7953         opinfo->op_state = OPLOCK_STATE_NONE;
7954         wake_up_interruptible_all(&opinfo->oplock_q);
7955         atomic_dec(&opinfo->breaking_cnt);
7956         wake_up_interruptible_all(&opinfo->oplock_brk);
7957         opinfo_put(opinfo);
7958
7959         if (ret < 0) {
7960                 rsp->hdr.Status = err;
7961                 goto err_out;
7962         }
7963
7964         rsp->StructureSize = cpu_to_le16(36);
7965         rsp->Reserved = 0;
7966         rsp->Flags = 0;
7967         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
7968         rsp->LeaseState = lease_state;
7969         rsp->LeaseDuration = 0;
7970         inc_rfc1001_len(rsp, 36);
7971         return;
7972
7973 err_out:
7974         opinfo->op_state = OPLOCK_STATE_NONE;
7975         wake_up_interruptible_all(&opinfo->oplock_q);
7976         atomic_dec(&opinfo->breaking_cnt);
7977         wake_up_interruptible_all(&opinfo->oplock_brk);
7978
7979         opinfo_put(opinfo);
7980         smb2_set_err_rsp(work);
7981 }
7982
7983 /**
7984  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
7985  * @work:       smb work containing oplock/lease break command buffer
7986  *
7987  * Return:      0
7988  */
7989 int smb2_oplock_break(struct ksmbd_work *work)
7990 {
7991         struct smb2_oplock_break *req = work->request_buf;
7992         struct smb2_oplock_break *rsp = work->response_buf;
7993
7994         switch (le16_to_cpu(req->StructureSize)) {
7995         case OP_BREAK_STRUCT_SIZE_20:
7996                 smb20_oplock_break_ack(work);
7997                 break;
7998         case OP_BREAK_STRUCT_SIZE_21:
7999                 smb21_lease_break_ack(work);
8000                 break;
8001         default:
8002                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8003                             le16_to_cpu(req->StructureSize));
8004                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8005                 smb2_set_err_rsp(work);
8006         }
8007
8008         return 0;
8009 }
8010
8011 /**
8012  * smb2_notify() - handler for smb2 notify request
8013  * @work:   smb work containing notify command buffer
8014  *
8015  * Return:      0
8016  */
8017 int smb2_notify(struct ksmbd_work *work)
8018 {
8019         struct smb2_notify_req *req;
8020         struct smb2_notify_rsp *rsp;
8021
8022         WORK_BUFFERS(work, req, rsp);
8023
8024         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8025                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8026                 smb2_set_err_rsp(work);
8027                 return 0;
8028         }
8029
8030         smb2_set_err_rsp(work);
8031         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8032         return 0;
8033 }
8034
8035 /**
8036  * smb2_is_sign_req() - handler for checking packet signing status
8037  * @work:       smb work containing notify command buffer
8038  * @command:    SMB2 command id
8039  *
8040  * Return:      true if packed is signed, false otherwise
8041  */
8042 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8043 {
8044         struct smb2_hdr *rcv_hdr2 = work->request_buf;
8045
8046         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8047             command != SMB2_NEGOTIATE_HE &&
8048             command != SMB2_SESSION_SETUP_HE &&
8049             command != SMB2_OPLOCK_BREAK_HE)
8050                 return true;
8051
8052         return false;
8053 }
8054
8055 /**
8056  * smb2_check_sign_req() - handler for req packet sign processing
8057  * @work:   smb work containing notify command buffer
8058  *
8059  * Return:      1 on success, 0 otherwise
8060  */
8061 int smb2_check_sign_req(struct ksmbd_work *work)
8062 {
8063         struct smb2_hdr *hdr, *hdr_org;
8064         char signature_req[SMB2_SIGNATURE_SIZE];
8065         char signature[SMB2_HMACSHA256_SIZE];
8066         struct kvec iov[1];
8067         size_t len;
8068
8069         hdr_org = hdr = work->request_buf;
8070         if (work->next_smb2_rcv_hdr_off)
8071                 hdr = ksmbd_req_buf_next(work);
8072
8073         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8074                 len = be32_to_cpu(hdr_org->smb2_buf_length);
8075         else if (hdr->NextCommand)
8076                 len = le32_to_cpu(hdr->NextCommand);
8077         else
8078                 len = be32_to_cpu(hdr_org->smb2_buf_length) -
8079                         work->next_smb2_rcv_hdr_off;
8080
8081         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8082         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8083
8084         iov[0].iov_base = (char *)&hdr->ProtocolId;
8085         iov[0].iov_len = len;
8086
8087         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8088                                 signature))
8089                 return 0;
8090
8091         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8092                 pr_err("bad smb2 signature\n");
8093                 return 0;
8094         }
8095
8096         return 1;
8097 }
8098
8099 /**
8100  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8101  * @work:   smb work containing notify command buffer
8102  *
8103  */
8104 void smb2_set_sign_rsp(struct ksmbd_work *work)
8105 {
8106         struct smb2_hdr *hdr, *hdr_org;
8107         struct smb2_hdr *req_hdr;
8108         char signature[SMB2_HMACSHA256_SIZE];
8109         struct kvec iov[2];
8110         size_t len;
8111         int n_vec = 1;
8112
8113         hdr_org = hdr = work->response_buf;
8114         if (work->next_smb2_rsp_hdr_off)
8115                 hdr = ksmbd_resp_buf_next(work);
8116
8117         req_hdr = ksmbd_req_buf_next(work);
8118
8119         if (!work->next_smb2_rsp_hdr_off) {
8120                 len = get_rfc1002_len(hdr_org);
8121                 if (req_hdr->NextCommand)
8122                         len = ALIGN(len, 8);
8123         } else {
8124                 len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
8125                 len = ALIGN(len, 8);
8126         }
8127
8128         if (req_hdr->NextCommand)
8129                 hdr->NextCommand = cpu_to_le32(len);
8130
8131         hdr->Flags |= SMB2_FLAGS_SIGNED;
8132         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8133
8134         iov[0].iov_base = (char *)&hdr->ProtocolId;
8135         iov[0].iov_len = len;
8136
8137         if (work->aux_payload_sz) {
8138                 iov[0].iov_len -= work->aux_payload_sz;
8139
8140                 iov[1].iov_base = work->aux_payload_buf;
8141                 iov[1].iov_len = work->aux_payload_sz;
8142                 n_vec++;
8143         }
8144
8145         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8146                                  signature))
8147                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8148 }
8149
8150 /**
8151  * smb3_check_sign_req() - handler for req packet sign processing
8152  * @work:   smb work containing notify command buffer
8153  *
8154  * Return:      1 on success, 0 otherwise
8155  */
8156 int smb3_check_sign_req(struct ksmbd_work *work)
8157 {
8158         struct ksmbd_conn *conn = work->conn;
8159         char *signing_key;
8160         struct smb2_hdr *hdr, *hdr_org;
8161         struct channel *chann;
8162         char signature_req[SMB2_SIGNATURE_SIZE];
8163         char signature[SMB2_CMACAES_SIZE];
8164         struct kvec iov[1];
8165         size_t len;
8166
8167         hdr_org = hdr = work->request_buf;
8168         if (work->next_smb2_rcv_hdr_off)
8169                 hdr = ksmbd_req_buf_next(work);
8170
8171         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8172                 len = be32_to_cpu(hdr_org->smb2_buf_length);
8173         else if (hdr->NextCommand)
8174                 len = le32_to_cpu(hdr->NextCommand);
8175         else
8176                 len = be32_to_cpu(hdr_org->smb2_buf_length) -
8177                         work->next_smb2_rcv_hdr_off;
8178
8179         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8180                 signing_key = work->sess->smb3signingkey;
8181         } else {
8182                 chann = lookup_chann_list(work->sess, conn);
8183                 if (!chann)
8184                         return 0;
8185                 signing_key = chann->smb3signingkey;
8186         }
8187
8188         if (!signing_key) {
8189                 pr_err("SMB3 signing key is not generated\n");
8190                 return 0;
8191         }
8192
8193         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8194         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8195         iov[0].iov_base = (char *)&hdr->ProtocolId;
8196         iov[0].iov_len = len;
8197
8198         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8199                 return 0;
8200
8201         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8202                 pr_err("bad smb2 signature\n");
8203                 return 0;
8204         }
8205
8206         return 1;
8207 }
8208
8209 /**
8210  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8211  * @work:   smb work containing notify command buffer
8212  *
8213  */
8214 void smb3_set_sign_rsp(struct ksmbd_work *work)
8215 {
8216         struct ksmbd_conn *conn = work->conn;
8217         struct smb2_hdr *req_hdr;
8218         struct smb2_hdr *hdr, *hdr_org;
8219         struct channel *chann;
8220         char signature[SMB2_CMACAES_SIZE];
8221         struct kvec iov[2];
8222         int n_vec = 1;
8223         size_t len;
8224         char *signing_key;
8225
8226         hdr_org = hdr = work->response_buf;
8227         if (work->next_smb2_rsp_hdr_off)
8228                 hdr = ksmbd_resp_buf_next(work);
8229
8230         req_hdr = ksmbd_req_buf_next(work);
8231
8232         if (!work->next_smb2_rsp_hdr_off) {
8233                 len = get_rfc1002_len(hdr_org);
8234                 if (req_hdr->NextCommand)
8235                         len = ALIGN(len, 8);
8236         } else {
8237                 len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
8238                 len = ALIGN(len, 8);
8239         }
8240
8241         if (conn->binding == false &&
8242             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8243                 signing_key = work->sess->smb3signingkey;
8244         } else {
8245                 chann = lookup_chann_list(work->sess, work->conn);
8246                 if (!chann)
8247                         return;
8248                 signing_key = chann->smb3signingkey;
8249         }
8250
8251         if (!signing_key)
8252                 return;
8253
8254         if (req_hdr->NextCommand)
8255                 hdr->NextCommand = cpu_to_le32(len);
8256
8257         hdr->Flags |= SMB2_FLAGS_SIGNED;
8258         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8259         iov[0].iov_base = (char *)&hdr->ProtocolId;
8260         iov[0].iov_len = len;
8261         if (work->aux_payload_sz) {
8262                 iov[0].iov_len -= work->aux_payload_sz;
8263                 iov[1].iov_base = work->aux_payload_buf;
8264                 iov[1].iov_len = work->aux_payload_sz;
8265                 n_vec++;
8266         }
8267
8268         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8269                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8270 }
8271
8272 /**
8273  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8274  * @work:   smb work containing response buffer
8275  *
8276  */
8277 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8278 {
8279         struct ksmbd_conn *conn = work->conn;
8280         struct ksmbd_session *sess = work->sess;
8281         struct smb2_hdr *req, *rsp;
8282
8283         if (conn->dialect != SMB311_PROT_ID)
8284                 return;
8285
8286         WORK_BUFFERS(work, req, rsp);
8287
8288         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8289             conn->preauth_info)
8290                 ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
8291                                                  conn->preauth_info->Preauth_HashValue);
8292
8293         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8294                 __u8 *hash_value;
8295
8296                 if (conn->binding) {
8297                         struct preauth_session *preauth_sess;
8298
8299                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8300                         if (!preauth_sess)
8301                                 return;
8302                         hash_value = preauth_sess->Preauth_HashValue;
8303                 } else {
8304                         hash_value = sess->Preauth_HashValue;
8305                         if (!hash_value)
8306                                 return;
8307                 }
8308                 ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
8309                                                  hash_value);
8310         }
8311 }
8312
8313 static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, char *old_buf,
8314                                __le16 cipher_type)
8315 {
8316         struct smb2_hdr *hdr = (struct smb2_hdr *)old_buf;
8317         unsigned int orig_len = get_rfc1002_len(old_buf);
8318
8319         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
8320         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8321         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8322         tr_hdr->Flags = cpu_to_le16(0x01);
8323         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8324             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8325                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8326         else
8327                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8328         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8329         inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
8330         inc_rfc1001_len(tr_hdr, orig_len);
8331 }
8332
8333 int smb3_encrypt_resp(struct ksmbd_work *work)
8334 {
8335         char *buf = work->response_buf;
8336         struct smb2_transform_hdr *tr_hdr;
8337         struct kvec iov[3];
8338         int rc = -ENOMEM;
8339         int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8340
8341         if (ARRAY_SIZE(iov) < rq_nvec)
8342                 return -ENOMEM;
8343
8344         tr_hdr = kzalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
8345         if (!tr_hdr)
8346                 return rc;
8347
8348         /* fill transform header */
8349         fill_transform_hdr(tr_hdr, buf, work->conn->cipher_type);
8350
8351         iov[0].iov_base = tr_hdr;
8352         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
8353         buf_size += iov[0].iov_len - 4;
8354
8355         iov[1].iov_base = buf + 4;
8356         iov[1].iov_len = get_rfc1002_len(buf);
8357         if (work->aux_payload_sz) {
8358                 iov[1].iov_len = work->resp_hdr_sz - 4;
8359
8360                 iov[2].iov_base = work->aux_payload_buf;
8361                 iov[2].iov_len = work->aux_payload_sz;
8362                 buf_size += iov[2].iov_len;
8363         }
8364         buf_size += iov[1].iov_len;
8365         work->resp_hdr_sz = iov[1].iov_len;
8366
8367         rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1);
8368         if (rc)
8369                 return rc;
8370
8371         memmove(buf, iov[1].iov_base, iov[1].iov_len);
8372         tr_hdr->smb2_buf_length = cpu_to_be32(buf_size);
8373         work->tr_buf = tr_hdr;
8374
8375         return rc;
8376 }
8377
8378 bool smb3_is_transform_hdr(void *buf)
8379 {
8380         struct smb2_transform_hdr *trhdr = buf;
8381
8382         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8383 }
8384
8385 int smb3_decrypt_req(struct ksmbd_work *work)
8386 {
8387         struct ksmbd_conn *conn = work->conn;
8388         struct ksmbd_session *sess;
8389         char *buf = work->request_buf;
8390         struct smb2_hdr *hdr;
8391         unsigned int pdu_length = get_rfc1002_len(buf);
8392         struct kvec iov[2];
8393         int buf_data_size = pdu_length + 4 -
8394                 sizeof(struct smb2_transform_hdr);
8395         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
8396         int rc = 0;
8397
8398         if (buf_data_size < sizeof(struct smb2_hdr)) {
8399                 pr_err("Transform message is too small (%u)\n",
8400                        pdu_length);
8401                 return -ECONNABORTED;
8402         }
8403
8404         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8405                 pr_err("Transform message is broken\n");
8406                 return -ECONNABORTED;
8407         }
8408
8409         sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId));
8410         if (!sess) {
8411                 pr_err("invalid session id(%llx) in transform header\n",
8412                        le64_to_cpu(tr_hdr->SessionId));
8413                 return -ECONNABORTED;
8414         }
8415
8416         iov[0].iov_base = buf;
8417         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
8418         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
8419         iov[1].iov_len = buf_data_size;
8420         rc = ksmbd_crypt_message(conn, iov, 2, 0);
8421         if (rc)
8422                 return rc;
8423
8424         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8425         hdr = (struct smb2_hdr *)buf;
8426         hdr->smb2_buf_length = cpu_to_be32(buf_data_size);
8427
8428         return rc;
8429 }
8430
8431 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8432 {
8433         struct ksmbd_conn *conn = work->conn;
8434         struct smb2_hdr *rsp = work->response_buf;
8435
8436         if (conn->dialect < SMB30_PROT_ID)
8437                 return false;
8438
8439         if (work->next_smb2_rcv_hdr_off)
8440                 rsp = ksmbd_resp_buf_next(work);
8441
8442         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8443             rsp->Status == STATUS_SUCCESS)
8444                 return true;
8445         return false;
8446 }