fs/smb/client/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2000,2005
   5  *
   6  *   Modified by Steve French (sfrench@us.ibm.com)
   7  */
   8 #include <linux/fs.h>
   9 #include <linux/string.h>
  10 #include <linux/ctype.h>
  11 #include <linux/kstrtox.h>
  12 #include <linux/module.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/uaccess.h>
  15 #include <uapi/linux/ethtool.h>
  16 #include "cifspdu.h"
  17 #include "cifsglob.h"
  18 #include "cifsproto.h"
  19 #include "cifs_debug.h"
  20 #include "cifsfs.h"
  21 #include "fs_context.h"
  22 #ifdef CONFIG_CIFS_DFS_UPCALL
  23 #include "dfs_cache.h"
  24 #endif
  25 #ifdef CONFIG_CIFS_SMB_DIRECT
  26 #include "smbdirect.h"
  27 #endif
  28 #include "cifs_swn.h"
  29
  30 void
  31 cifs_dump_mem(char *label, void *data, int length)
  32 {
  33         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  34         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  35                        data, length, true);
  36 }
  37
  38 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  39 {
  40 #ifdef CONFIG_CIFS_DEBUG2
  41         struct smb_hdr *smb = buf;
  42
  43         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  44                  smb->Command, smb->Status.CifsError,
  45                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  46         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  47                  server->ops->calc_smb_size(smb));
  48 #endif /* CONFIG_CIFS_DEBUG2 */
  49 }
  50
  51 void cifs_dump_mids(struct TCP_Server_Info *server)
  52 {
  53 #ifdef CONFIG_CIFS_DEBUG2
  54         struct mid_q_entry *mid_entry;
  55
  56         if (server == NULL)
  57                 return;
  58
  59         cifs_dbg(VFS, "Dump pending requests:\n");
  60         spin_lock(&server->mid_lock);
  61         list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
  62                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  63                          mid_entry->mid_state,
  64                          le16_to_cpu(mid_entry->command),
  65                          mid_entry->pid,
  66                          mid_entry->callback_data,
  67                          mid_entry->mid);
  68 #ifdef CONFIG_CIFS_STATS2
  69                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  70                          mid_entry->large_buf,
  71                          mid_entry->resp_buf,
  72                          mid_entry->when_received,
  73                          jiffies);
  74 #endif /* STATS2 */
  75                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  76                          mid_entry->multiRsp, mid_entry->multiEnd);
  77                 if (mid_entry->resp_buf) {
  78                         cifs_dump_detail(mid_entry->resp_buf, server);
  79                         cifs_dump_mem("existing buf: ",
  80                                 mid_entry->resp_buf, 62);
  81                 }
  82         }
  83         spin_unlock(&server->mid_lock);
  84 #endif /* CONFIG_CIFS_DEBUG2 */
  85 }
  86
  87 #ifdef CONFIG_PROC_FS
  88 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  89 {
  90         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  91
  92         seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
  93         if (tcon->nativeFileSystem)
  94                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  95         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  96                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  97                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
  98                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  99                    tcon->status);
 100         if (dev_type == FILE_DEVICE_DISK)
 101                 seq_puts(m, " type: DISK ");
 102         else if (dev_type == FILE_DEVICE_CD_ROM)
 103                 seq_puts(m, " type: CDROM ");
 104         else
 105                 seq_printf(m, " type: %d ", dev_type);
 106
 107         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 108
 109         if ((tcon->seal) ||
 110             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 111             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 112                 seq_puts(m, " encrypted");
 113         if (tcon->nocase)
 114                 seq_printf(m, " nocase");
 115         if (tcon->unix_ext)
 116                 seq_printf(m, " POSIX Extensions");
 117         if (tcon->ses->server->ops->dump_share_caps)
 118                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 119         if (tcon->use_witness)
 120                 seq_puts(m, " Witness");
 121         if (tcon->broken_sparse_sup)
 122                 seq_puts(m, " nosparse");
 123         if (tcon->need_reconnect)
 124                 seq_puts(m, "\tDISCONNECTED ");
 125         spin_lock(&tcon->tc_lock);
 126         if (tcon->origin_fullpath) {
 127                 seq_printf(m, "\n\tDFS origin fullpath: %s",
 128                            tcon->origin_fullpath);
 129         }
 130         spin_unlock(&tcon->tc_lock);
 131         seq_putc(m, '\n');
 132 }
 133
 134 static void
 135 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 136 {
 137         struct TCP_Server_Info *server = chan->server;
 138
 139         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 140                    "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
 141                    "\n\t\tTCP status: %d Instance: %d"
 142                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 143                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 144                    i+1, server->conn_id,
 145                    server->credits,
 146                    server->echo_credits,
 147                    server->oplock_credits,
 148                    server->dialect,
 149                    server->tcpStatus,
 150                    server->reconnect_instance,
 151                    server->srv_count,
 152                    server->sec_mode,
 153                    in_flight(server),
 154                    atomic_read(&server->in_send),
 155                    atomic_read(&server->num_waiters));
 156 #ifdef CONFIG_NET_NS
 157         if (server->net)
 158                 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
 159 #endif /* NET_NS */
 160
 161 }
 162
 163 static inline const char *smb_speed_to_str(size_t bps)
 164 {
 165         size_t mbps = bps / 1000 / 1000;
 166
 167         switch (mbps) {
 168         case SPEED_10:
 169                 return "10Mbps";
 170         case SPEED_100:
 171                 return "100Mbps";
 172         case SPEED_1000:
 173                 return "1Gbps";
 174         case SPEED_2500:
 175                 return "2.5Gbps";
 176         case SPEED_5000:
 177                 return "5Gbps";
 178         case SPEED_10000:
 179                 return "10Gbps";
 180         case SPEED_14000:
 181                 return "14Gbps";
 182         case SPEED_20000:
 183                 return "20Gbps";
 184         case SPEED_25000:
 185                 return "25Gbps";
 186         case SPEED_40000:
 187                 return "40Gbps";
 188         case SPEED_50000:
 189                 return "50Gbps";
 190         case SPEED_56000:
 191                 return "56Gbps";
 192         case SPEED_100000:
 193                 return "100Gbps";
 194         case SPEED_200000:
 195                 return "200Gbps";
 196         case SPEED_400000:
 197                 return "400Gbps";
 198         case SPEED_800000:
 199                 return "800Gbps";
 200         default:
 201                 return "Unknown";
 202         }
 203 }
 204
 205 static void
 206 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 207 {
 208         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 209         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 210
 211         seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
 212         seq_puts(m, "\t\tCapabilities: ");
 213         if (iface->rdma_capable)
 214                 seq_puts(m, "rdma ");
 215         if (iface->rss_capable)
 216                 seq_puts(m, "rss ");
 217         if (!iface->rdma_capable && !iface->rss_capable)
 218                 seq_puts(m, "None");
 219         seq_putc(m, '\n');
 220         if (iface->sockaddr.ss_family == AF_INET)
 221                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 222         else if (iface->sockaddr.ss_family == AF_INET6)
 223                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 224         if (!iface->is_active)
 225                 seq_puts(m, "\t\t[for-cleanup]\n");
 226 }
 227
 228 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 229 {
 230         struct TCP_Server_Info *server;
 231         struct cifs_ses *ses;
 232         struct cifs_tcon *tcon;
 233         struct cifsFileInfo *cfile;
 234
 235         seq_puts(m, "# Version:1\n");
 236         seq_puts(m, "# Format:\n");
 237         seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
 238 #ifdef CONFIG_CIFS_DEBUG2
 239         seq_printf(m, " <filename> <mid>\n");
 240 #else
 241         seq_printf(m, " <filename>\n");
 242 #endif /* CIFS_DEBUG2 */
 243         spin_lock(&cifs_tcp_ses_lock);
 244         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 245                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 246                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 247                                 spin_lock(&tcon->open_file_lock);
 248                                 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
 249                                         seq_printf(m,
 250                                                 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
 251                                                 tcon->tid,
 252                                                 ses->Suid,
 253                                                 cfile->fid.persistent_fid,
 254                                                 cfile->f_flags,
 255                                                 cfile->count,
 256                                                 cfile->pid,
 257                                                 from_kuid(&init_user_ns, cfile->uid),
 258                                                 cfile->dentry);
 259 #ifdef CONFIG_CIFS_DEBUG2
 260                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 261 #else
 262                                         seq_printf(m, "\n");
 263 #endif /* CIFS_DEBUG2 */
 264                                 }
 265                                 spin_unlock(&tcon->open_file_lock);
 266                         }
 267                 }
 268         }
 269         spin_unlock(&cifs_tcp_ses_lock);
 270         seq_putc(m, '\n');
 271         return 0;
 272 }
 273
 274 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 275 {
 276         struct mid_q_entry *mid_entry;
 277         struct TCP_Server_Info *server;
 278         struct TCP_Server_Info *chan_server;
 279         struct cifs_ses *ses;
 280         struct cifs_tcon *tcon;
 281         struct cifs_server_iface *iface;
 282         size_t iface_weight = 0, iface_min_speed = 0;
 283         struct cifs_server_iface *last_iface = NULL;
 284         int c, i, j;
 285
 286         seq_puts(m,
 287                     "Display Internal CIFS Data Structures for Debugging\n"
 288                     "---------------------------------------------------\n");
 289         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 290         seq_printf(m, "Features:");
 291 #ifdef CONFIG_CIFS_DFS_UPCALL
 292         seq_printf(m, " DFS");
 293 #endif
 294 #ifdef CONFIG_CIFS_FSCACHE
 295         seq_printf(m, ",FSCACHE");
 296 #endif
 297 #ifdef CONFIG_CIFS_SMB_DIRECT
 298         seq_printf(m, ",SMB_DIRECT");
 299 #endif
 300 #ifdef CONFIG_CIFS_STATS2
 301         seq_printf(m, ",STATS2");
 302 #else
 303         seq_printf(m, ",STATS");
 304 #endif
 305 #ifdef CONFIG_CIFS_DEBUG2
 306         seq_printf(m, ",DEBUG2");
 307 #elif defined(CONFIG_CIFS_DEBUG)
 308         seq_printf(m, ",DEBUG");
 309 #endif
 310 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 311         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 312 #endif
 313 #ifdef CONFIG_CIFS_POSIX
 314         seq_printf(m, ",CIFS_POSIX");
 315 #endif
 316 #ifdef CONFIG_CIFS_UPCALL
 317         seq_printf(m, ",UPCALL(SPNEGO)");
 318 #endif
 319 #ifdef CONFIG_CIFS_XATTR
 320         seq_printf(m, ",XATTR");
 321 #endif
 322         seq_printf(m, ",ACL");
 323 #ifdef CONFIG_CIFS_SWN_UPCALL
 324         seq_puts(m, ",WITNESS");
 325 #endif
 326         seq_putc(m, '\n');
 327         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 328         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 329
 330         seq_printf(m, "\nServers: ");
 331
 332         c = 0;
 333         spin_lock(&cifs_tcp_ses_lock);
 334         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 335                 /* channel info will be printed as a part of sessions below */
 336                 if (SERVER_IS_CHAN(server))
 337                         continue;
 338
 339                 c++;
 340                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 341                         c, server->conn_id);
 342
 343                 spin_lock(&server->srv_lock);
 344                 if (server->hostname)
 345                         seq_printf(m, "Hostname: %s ", server->hostname);
 346                 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
 347                 spin_unlock(&server->srv_lock);
 348 #ifdef CONFIG_CIFS_SMB_DIRECT
 349                 if (!server->rdma)
 350                         goto skip_rdma;
 351
 352                 if (!server->smbd_conn) {
 353                         seq_printf(m, "\nSMBDirect transport not available");
 354                         goto skip_rdma;
 355                 }
 356
 357                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 358                         "transport status: %x",
 359                         server->smbd_conn->protocol,
 360                         server->smbd_conn->transport_status);
 361                 seq_printf(m, "\nConn receive_credit_max: %x "
 362                         "send_credit_target: %x max_send_size: %x",
 363                         server->smbd_conn->receive_credit_max,
 364                         server->smbd_conn->send_credit_target,
 365                         server->smbd_conn->max_send_size);
 366                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 367                         "max_fragmented_send_size: %x max_receive_size:%x",
 368                         server->smbd_conn->max_fragmented_recv_size,
 369                         server->smbd_conn->max_fragmented_send_size,
 370                         server->smbd_conn->max_receive_size);
 371                 seq_printf(m, "\nConn keep_alive_interval: %x "
 372                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 373                         server->smbd_conn->keep_alive_interval,
 374                         server->smbd_conn->max_readwrite_size,
 375                         server->smbd_conn->rdma_readwrite_threshold);
 376                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 377                         "count_put_receive_buffer: %x count_send_empty: %x",
 378                         server->smbd_conn->count_get_receive_buffer,
 379                         server->smbd_conn->count_put_receive_buffer,
 380                         server->smbd_conn->count_send_empty);
 381                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 382                         "count_enqueue_reassembly_queue: %x "
 383                         "count_dequeue_reassembly_queue: %x "
 384                         "fragment_reassembly_remaining: %x "
 385                         "reassembly_data_length: %x "
 386                         "reassembly_queue_length: %x",
 387                         server->smbd_conn->count_reassembly_queue,
 388                         server->smbd_conn->count_enqueue_reassembly_queue,
 389                         server->smbd_conn->count_dequeue_reassembly_queue,
 390                         server->smbd_conn->fragment_reassembly_remaining,
 391                         server->smbd_conn->reassembly_data_length,
 392                         server->smbd_conn->reassembly_queue_length);
 393                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 394                         "receive_credits: %x receive_credit_target: %x",
 395                         atomic_read(&server->smbd_conn->send_credits),
 396                         atomic_read(&server->smbd_conn->receive_credits),
 397                         server->smbd_conn->receive_credit_target);
 398                 seq_printf(m, "\nPending send_pending: %x ",
 399                         atomic_read(&server->smbd_conn->send_pending));
 400                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 401                         "count_empty_packet_queue: %x",
 402                         server->smbd_conn->count_receive_queue,
 403                         server->smbd_conn->count_empty_packet_queue);
 404                 seq_printf(m, "\nMR responder_resources: %x "
 405                         "max_frmr_depth: %x mr_type: %x",
 406                         server->smbd_conn->responder_resources,
 407                         server->smbd_conn->max_frmr_depth,
 408                         server->smbd_conn->mr_type);
 409                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 410                         atomic_read(&server->smbd_conn->mr_ready_count),
 411                         atomic_read(&server->smbd_conn->mr_used_count));
 412 skip_rdma:
 413 #endif
 414                 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
 415                         server->credits,
 416                         server->echo_credits,
 417                         server->oplock_credits,
 418                         server->dialect);
 419                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 420                         seq_printf(m, " COMPRESS_LZNT1");
 421                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 422                         seq_printf(m, " COMPRESS_LZ77");
 423                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 424                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 425                 if (server->sign)
 426                         seq_printf(m, " signed");
 427                 if (server->posix_ext_supported)
 428                         seq_printf(m, " posix");
 429                 if (server->nosharesock)
 430                         seq_printf(m, " nosharesock");
 431
 432                 if (server->rdma)
 433                         seq_printf(m, "\nRDMA ");
 434                 seq_printf(m, "\nTCP status: %d Instance: %d"
 435                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 436                                 server->tcpStatus,
 437                                 server->reconnect_instance,
 438                                 server->srv_count,
 439                                 server->sec_mode, in_flight(server));
 440 #ifdef CONFIG_NET_NS
 441                 if (server->net)
 442                         seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
 443 #endif /* NET_NS */
 444
 445                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 446                                 atomic_read(&server->in_send),
 447                                 atomic_read(&server->num_waiters));
 448
 449                 if (server->leaf_fullpath) {
 450                         seq_printf(m, "\nDFS leaf full path: %s",
 451                                    server->leaf_fullpath);
 452                 }
 453
 454                 seq_printf(m, "\n\n\tSessions: ");
 455                 i = 0;
 456                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 457                         spin_lock(&ses->ses_lock);
 458                         if (ses->ses_status == SES_EXITING) {
 459                                 spin_unlock(&ses->ses_lock);
 460                                 continue;
 461                         }
 462                         i++;
 463                         if ((ses->serverDomain == NULL) ||
 464                                 (ses->serverOS == NULL) ||
 465                                 (ses->serverNOS == NULL)) {
 466                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 467                                         i, ses->ip_addr, ses->ses_count,
 468                                         ses->capabilities, ses->ses_status);
 469                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 470                                         seq_printf(m, "Guest ");
 471                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 472                                         seq_printf(m, "Anonymous ");
 473                         } else {
 474                                 seq_printf(m,
 475                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 476                                     "\n\tNOS: %s\tCapability: 0x%x"
 477                                         "\n\tSMB session status: %d ",
 478                                 i, ses->ip_addr, ses->serverDomain,
 479                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 480                                 ses->capabilities, ses->ses_status);
 481                         }
 482                         spin_unlock(&ses->ses_lock);
 483
 484                         seq_printf(m, "\n\tSecurity type: %s ",
 485                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 486
 487                         /* dump session id helpful for use with network trace */
 488                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 489                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
 490                                 seq_puts(m, " encrypted");
 491                                 /* can help in debugging to show encryption type */
 492                                 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
 493                                         seq_puts(m, "(gcm256)");
 494                         }
 495                         if (ses->sign)
 496                                 seq_puts(m, " signed");
 497
 498                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 499                                    from_kuid(&init_user_ns, ses->linux_uid),
 500                                    from_kuid(&init_user_ns, ses->cred_uid));
 501
 502                         if (ses->dfs_root_ses) {
 503                                 seq_printf(m, "\n\tDFS root session id: 0x%llx",
 504                                            ses->dfs_root_ses->Suid);
 505                         }
 506
 507                         spin_lock(&ses->chan_lock);
 508                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
 509                                 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
 510                         if (CIFS_CHAN_IN_RECONNECT(ses, 0))
 511                                 seq_puts(m, "\t[RECONNECTING] ");
 512
 513                         if (ses->chan_count > 1) {
 514                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 515                                            ses->chan_count-1);
 516                                 for (j = 1; j < ses->chan_count; j++) {
 517                                         cifs_dump_channel(m, j, &ses->chans[j]);
 518                                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
 519                                                 seq_puts(m, "\tDISCONNECTED ");
 520                                         if (CIFS_CHAN_IN_RECONNECT(ses, j))
 521                                                 seq_puts(m, "\t[RECONNECTING] ");
 522                                 }
 523                         }
 524                         spin_unlock(&ses->chan_lock);
 525
 526                         seq_puts(m, "\n\n\tShares: ");
 527                         j = 0;
 528
 529                         seq_printf(m, "\n\t%d) IPC: ", j);
 530                         if (ses->tcon_ipc)
 531                                 cifs_debug_tcon(m, ses->tcon_ipc);
 532                         else
 533                                 seq_puts(m, "none\n");
 534
 535                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 536                                 ++j;
 537                                 seq_printf(m, "\n\t%d) ", j);
 538                                 cifs_debug_tcon(m, tcon);
 539                         }
 540
 541                         spin_lock(&ses->iface_lock);
 542                         if (ses->iface_count)
 543                                 seq_printf(m, "\n\n\tServer interfaces: %zu"
 544                                            "\tLast updated: %lu seconds ago",
 545                                            ses->iface_count,
 546                                            (jiffies - ses->iface_last_update) / HZ);
 547
 548                         last_iface = list_last_entry(&ses->iface_list,
 549                                                      struct cifs_server_iface,
 550                                                      iface_head);
 551                         iface_min_speed = last_iface->speed;
 552
 553                         j = 0;
 554                         list_for_each_entry(iface, &ses->iface_list,
 555                                                  iface_head) {
 556                                 seq_printf(m, "\n\t%d)", ++j);
 557                                 cifs_dump_iface(m, iface);
 558
 559                                 iface_weight = iface->speed / iface_min_speed;
 560                                 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
 561                                            "\n\t\tAllocated channels: %u\n",
 562                                            iface->weight_fulfilled,
 563                                            iface_weight,
 564                                            iface->num_channels);
 565
 566                                 if (is_ses_using_iface(ses, iface))
 567                                         seq_puts(m, "\t\t[CONNECTED]\n");
 568                         }
 569                         spin_unlock(&ses->iface_lock);
 570
 571                         seq_puts(m, "\n\n\tMIDs: ");
 572                         spin_lock(&ses->chan_lock);
 573                         for (j = 0; j < ses->chan_count; j++) {
 574                                 chan_server = ses->chans[j].server;
 575                                 if (!chan_server)
 576                                         continue;
 577
 578                                 if (list_empty(&chan_server->pending_mid_q))
 579                                         continue;
 580
 581                                 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
 582                                            chan_server->conn_id);
 583                                 spin_lock(&chan_server->mid_lock);
 584                                 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
 585                                         seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
 586                                                    mid_entry->mid_state,
 587                                                    le16_to_cpu(mid_entry->command),
 588                                                    mid_entry->pid,
 589                                                    mid_entry->callback_data,
 590                                                    mid_entry->mid);
 591                                 }
 592                                 spin_unlock(&chan_server->mid_lock);
 593                         }
 594                         spin_unlock(&ses->chan_lock);
 595                         seq_puts(m, "\n--\n");
 596                 }
 597                 if (i == 0)
 598                         seq_printf(m, "\n\t\t[NONE]");
 599         }
 600         if (c == 0)
 601                 seq_printf(m, "\n\t[NONE]");
 602
 603         spin_unlock(&cifs_tcp_ses_lock);
 604         seq_putc(m, '\n');
 605         cifs_swn_dump(m);
 606
 607         /* BB add code to dump additional info such as TCP session info now */
 608         return 0;
 609 }
 610
 611 static ssize_t cifs_stats_proc_write(struct file *file,
 612                 const char __user *buffer, size_t count, loff_t *ppos)
 613 {
 614         bool bv;
 615         int rc;
 616         struct TCP_Server_Info *server;
 617         struct cifs_ses *ses;
 618         struct cifs_tcon *tcon;
 619
 620         rc = kstrtobool_from_user(buffer, count, &bv);
 621         if (rc == 0) {
 622 #ifdef CONFIG_CIFS_STATS2
 623                 int i;
 624
 625                 atomic_set(&total_buf_alloc_count, 0);
 626                 atomic_set(&total_small_buf_alloc_count, 0);
 627 #endif /* CONFIG_CIFS_STATS2 */
 628                 atomic_set(&tcpSesReconnectCount, 0);
 629                 atomic_set(&tconInfoReconnectCount, 0);
 630
 631                 spin_lock(&GlobalMid_Lock);
 632                 GlobalMaxActiveXid = 0;
 633                 GlobalCurrentXid = 0;
 634                 spin_unlock(&GlobalMid_Lock);
 635                 spin_lock(&cifs_tcp_ses_lock);
 636                 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 637                         server->max_in_flight = 0;
 638 #ifdef CONFIG_CIFS_STATS2
 639                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 640                                 atomic_set(&server->num_cmds[i], 0);
 641                                 atomic_set(&server->smb2slowcmd[i], 0);
 642                                 server->time_per_cmd[i] = 0;
 643                                 server->slowest_cmd[i] = 0;
 644                                 server->fastest_cmd[0] = 0;
 645                         }
 646 #endif /* CONFIG_CIFS_STATS2 */
 647                         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 648                                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 649                                         atomic_set(&tcon->num_smbs_sent, 0);
 650                                         spin_lock(&tcon->stat_lock);
 651                                         tcon->bytes_read = 0;
 652                                         tcon->bytes_written = 0;
 653                                         spin_unlock(&tcon->stat_lock);
 654                                         if (server->ops->clear_stats)
 655                                                 server->ops->clear_stats(tcon);
 656                                 }
 657                         }
 658                 }
 659                 spin_unlock(&cifs_tcp_ses_lock);
 660         } else {
 661                 return rc;
 662         }
 663
 664         return count;
 665 }
 666
 667 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 668 {
 669         int i;
 670 #ifdef CONFIG_CIFS_STATS2
 671         int j;
 672 #endif /* STATS2 */
 673         struct TCP_Server_Info *server;
 674         struct cifs_ses *ses;
 675         struct cifs_tcon *tcon;
 676
 677         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 678                         sesInfoAllocCount.counter);
 679         seq_printf(m, "Share (unique mount targets): %d\n",
 680                         tconInfoAllocCount.counter);
 681         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 682                         buf_alloc_count.counter,
 683                         cifs_min_rcv + tcpSesAllocCount.counter);
 684         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 685                         small_buf_alloc_count.counter, cifs_min_small);
 686 #ifdef CONFIG_CIFS_STATS2
 687         seq_printf(m, "Total Large %d Small %d Allocations\n",
 688                                 atomic_read(&total_buf_alloc_count),
 689                                 atomic_read(&total_small_buf_alloc_count));
 690 #endif /* CONFIG_CIFS_STATS2 */
 691
 692         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
 693         seq_printf(m,
 694                 "\n%d session %d share reconnects\n",
 695                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 696
 697         seq_printf(m,
 698                 "Total vfs operations: %d maximum at one time: %d\n",
 699                 GlobalCurrentXid, GlobalMaxActiveXid);
 700
 701         i = 0;
 702         spin_lock(&cifs_tcp_ses_lock);
 703         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 704                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 705 #ifdef CONFIG_CIFS_STATS2
 706                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 707                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 708                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 709                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 710                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 711                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 712                                 atomic_read(&server->num_cmds[j]),
 713                                 server->time_per_cmd[j],
 714                                 server->fastest_cmd[j],
 715                                 server->slowest_cmd[j]);
 716                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 717                         if (atomic_read(&server->smb2slowcmd[j])) {
 718                                 spin_lock(&server->srv_lock);
 719                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 720                                         atomic_read(&server->smb2slowcmd[j]),
 721                                         server->hostname, j);
 722                                 spin_unlock(&server->srv_lock);
 723                         }
 724 #endif /* STATS2 */
 725                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 726                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 727                                 i++;
 728                                 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
 729                                 if (tcon->need_reconnect)
 730                                         seq_puts(m, "\tDISCONNECTED ");
 731                                 seq_printf(m, "\nSMBs: %d",
 732                                            atomic_read(&tcon->num_smbs_sent));
 733                                 if (server->ops->print_stats)
 734                                         server->ops->print_stats(m, tcon);
 735                         }
 736                 }
 737         }
 738         spin_unlock(&cifs_tcp_ses_lock);
 739
 740         seq_putc(m, '\n');
 741         return 0;
 742 }
 743
 744 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 745 {
 746         return single_open(file, cifs_stats_proc_show, NULL);
 747 }
 748
 749 static const struct proc_ops cifs_stats_proc_ops = {
 750         .proc_open      = cifs_stats_proc_open,
 751         .proc_read      = seq_read,
 752         .proc_lseek     = seq_lseek,
 753         .proc_release   = single_release,
 754         .proc_write     = cifs_stats_proc_write,
 755 };
 756
 757 #ifdef CONFIG_CIFS_SMB_DIRECT
 758 #define PROC_FILE_DEFINE(name) \
 759 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 760         size_t count, loff_t *ppos) \
 761 { \
 762         int rc; \
 763         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 764         if (rc) \
 765                 return rc; \
 766         return count; \
 767 } \
 768 static int name##_proc_show(struct seq_file *m, void *v) \
 769 { \
 770         seq_printf(m, "%d\n", name ); \
 771         return 0; \
 772 } \
 773 static int name##_open(struct inode *inode, struct file *file) \
 774 { \
 775         return single_open(file, name##_proc_show, NULL); \
 776 } \
 777 \
 778 static const struct proc_ops cifs_##name##_proc_fops = { \
 779         .proc_open      = name##_open, \
 780         .proc_read      = seq_read, \
 781         .proc_lseek     = seq_lseek, \
 782         .proc_release   = single_release, \
 783         .proc_write     = name##_write, \
 784 }
 785
 786 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 787 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 788 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 789 PROC_FILE_DEFINE(smbd_max_receive_size);
 790 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 791 PROC_FILE_DEFINE(smbd_max_send_size);
 792 PROC_FILE_DEFINE(smbd_send_credit_target);
 793 PROC_FILE_DEFINE(smbd_receive_credit_max);
 794 #endif
 795
 796 static struct proc_dir_entry *proc_fs_cifs;
 797 static const struct proc_ops cifsFYI_proc_ops;
 798 static const struct proc_ops cifs_lookup_cache_proc_ops;
 799 static const struct proc_ops traceSMB_proc_ops;
 800 static const struct proc_ops cifs_security_flags_proc_ops;
 801 static const struct proc_ops cifs_linux_ext_proc_ops;
 802 static const struct proc_ops cifs_mount_params_proc_ops;
 803
 804 void
 805 cifs_proc_init(void)
 806 {
 807         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 808         if (proc_fs_cifs == NULL)
 809                 return;
 810
 811         proc_create_single("DebugData", 0, proc_fs_cifs,
 812                         cifs_debug_data_proc_show);
 813
 814         proc_create_single("open_files", 0400, proc_fs_cifs,
 815                         cifs_debug_files_proc_show);
 816
 817         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 818         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 819         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 820         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 821                     &cifs_linux_ext_proc_ops);
 822         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 823                     &cifs_security_flags_proc_ops);
 824         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 825                     &cifs_lookup_cache_proc_ops);
 826
 827         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 828
 829 #ifdef CONFIG_CIFS_DFS_UPCALL
 830         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 831 #endif
 832
 833 #ifdef CONFIG_CIFS_SMB_DIRECT
 834         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 835                 &cifs_rdma_readwrite_threshold_proc_fops);
 836         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 837                 &cifs_smbd_max_frmr_depth_proc_fops);
 838         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 839                 &cifs_smbd_keep_alive_interval_proc_fops);
 840         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 841                 &cifs_smbd_max_receive_size_proc_fops);
 842         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 843                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 844         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 845                 &cifs_smbd_max_send_size_proc_fops);
 846         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 847                 &cifs_smbd_send_credit_target_proc_fops);
 848         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 849                 &cifs_smbd_receive_credit_max_proc_fops);
 850 #endif
 851 }
 852
 853 void
 854 cifs_proc_clean(void)
 855 {
 856         if (proc_fs_cifs == NULL)
 857                 return;
 858
 859         remove_proc_entry("DebugData", proc_fs_cifs);
 860         remove_proc_entry("open_files", proc_fs_cifs);
 861         remove_proc_entry("cifsFYI", proc_fs_cifs);
 862         remove_proc_entry("traceSMB", proc_fs_cifs);
 863         remove_proc_entry("Stats", proc_fs_cifs);
 864         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 865         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 866         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 867         remove_proc_entry("mount_params", proc_fs_cifs);
 868
 869 #ifdef CONFIG_CIFS_DFS_UPCALL
 870         remove_proc_entry("dfscache", proc_fs_cifs);
 871 #endif
 872 #ifdef CONFIG_CIFS_SMB_DIRECT
 873         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 874         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 875         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 876         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 877         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 878         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 879         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 880         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 881 #endif
 882         remove_proc_entry("fs/cifs", NULL);
 883 }
 884
 885 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 886 {
 887         seq_printf(m, "%d\n", cifsFYI);
 888         return 0;
 889 }
 890
 891 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 892 {
 893         return single_open(file, cifsFYI_proc_show, NULL);
 894 }
 895
 896 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 897                 size_t count, loff_t *ppos)
 898 {
 899         char c[2] = { '\0' };
 900         bool bv;
 901         int rc;
 902
 903         rc = get_user(c[0], buffer);
 904         if (rc)
 905                 return rc;
 906         if (kstrtobool(c, &bv) == 0)
 907                 cifsFYI = bv;
 908         else if ((c[0] > '1') && (c[0] <= '9'))
 909                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 910         else
 911                 return -EINVAL;
 912
 913         return count;
 914 }
 915
 916 static const struct proc_ops cifsFYI_proc_ops = {
 917         .proc_open      = cifsFYI_proc_open,
 918         .proc_read      = seq_read,
 919         .proc_lseek     = seq_lseek,
 920         .proc_release   = single_release,
 921         .proc_write     = cifsFYI_proc_write,
 922 };
 923
 924 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 925 {
 926         seq_printf(m, "%d\n", linuxExtEnabled);
 927         return 0;
 928 }
 929
 930 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 931 {
 932         return single_open(file, cifs_linux_ext_proc_show, NULL);
 933 }
 934
 935 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 936                 const char __user *buffer, size_t count, loff_t *ppos)
 937 {
 938         int rc;
 939
 940         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 941         if (rc)
 942                 return rc;
 943
 944         return count;
 945 }
 946
 947 static const struct proc_ops cifs_linux_ext_proc_ops = {
 948         .proc_open      = cifs_linux_ext_proc_open,
 949         .proc_read      = seq_read,
 950         .proc_lseek     = seq_lseek,
 951         .proc_release   = single_release,
 952         .proc_write     = cifs_linux_ext_proc_write,
 953 };
 954
 955 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 956 {
 957         seq_printf(m, "%d\n", lookupCacheEnabled);
 958         return 0;
 959 }
 960
 961 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 962 {
 963         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 964 }
 965
 966 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 967                 const char __user *buffer, size_t count, loff_t *ppos)
 968 {
 969         int rc;
 970
 971         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 972         if (rc)
 973                 return rc;
 974
 975         return count;
 976 }
 977
 978 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 979         .proc_open      = cifs_lookup_cache_proc_open,
 980         .proc_read      = seq_read,
 981         .proc_lseek     = seq_lseek,
 982         .proc_release   = single_release,
 983         .proc_write     = cifs_lookup_cache_proc_write,
 984 };
 985
 986 static int traceSMB_proc_show(struct seq_file *m, void *v)
 987 {
 988         seq_printf(m, "%d\n", traceSMB);
 989         return 0;
 990 }
 991
 992 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 993 {
 994         return single_open(file, traceSMB_proc_show, NULL);
 995 }
 996
 997 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 998                 size_t count, loff_t *ppos)
 999 {
1000         int rc;
1001
1002         rc = kstrtobool_from_user(buffer, count, &traceSMB);
1003         if (rc)
1004                 return rc;
1005
1006         return count;
1007 }
1008
1009 static const struct proc_ops traceSMB_proc_ops = {
1010         .proc_open      = traceSMB_proc_open,
1011         .proc_read      = seq_read,
1012         .proc_lseek     = seq_lseek,
1013         .proc_release   = single_release,
1014         .proc_write     = traceSMB_proc_write,
1015 };
1016
1017 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1018 {
1019         seq_printf(m, "0x%x\n", global_secflags);
1020         return 0;
1021 }
1022
1023 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1024 {
1025         return single_open(file, cifs_security_flags_proc_show, NULL);
1026 }
1027
1028 /*
1029  * Ensure that if someone sets a MUST flag, that we disable all other MAY
1030  * flags except for the ones corresponding to the given MUST flag. If there are
1031  * multiple MUST flags, then try to prefer more secure ones.
1032  */
1033 static void
1034 cifs_security_flags_handle_must_flags(unsigned int *flags)
1035 {
1036         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
1037
1038         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1039                 *flags = CIFSSEC_MUST_KRB5;
1040         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1041                 *flags = CIFSSEC_MUST_NTLMSSP;
1042         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1043                 *flags = CIFSSEC_MUST_NTLMV2;
1044
1045         *flags |= signflags;
1046 }
1047
1048 static ssize_t cifs_security_flags_proc_write(struct file *file,
1049                 const char __user *buffer, size_t count, loff_t *ppos)
1050 {
1051         int rc;
1052         unsigned int flags;
1053         char flags_string[12];
1054         bool bv;
1055
1056         if ((count < 1) || (count > 11))
1057                 return -EINVAL;
1058
1059         memset(flags_string, 0, 12);
1060
1061         if (copy_from_user(flags_string, buffer, count))
1062                 return -EFAULT;
1063
1064         if (count < 3) {
1065                 /* single char or single char followed by null */
1066                 if (kstrtobool(flags_string, &bv) == 0) {
1067                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1068                         return count;
1069                 } else if (!isdigit(flags_string[0])) {
1070                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1071                                         flags_string);
1072                         return -EINVAL;
1073                 }
1074         }
1075
1076         /* else we have a number */
1077         rc = kstrtouint(flags_string, 0, &flags);
1078         if (rc) {
1079                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1080                                 flags_string);
1081                 return rc;
1082         }
1083
1084         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1085
1086         if (flags == 0)  {
1087                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1088                 return -EINVAL;
1089         }
1090
1091         if (flags & ~CIFSSEC_MASK) {
1092                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1093                          flags & ~CIFSSEC_MASK);
1094                 return -EINVAL;
1095         }
1096
1097         cifs_security_flags_handle_must_flags(&flags);
1098
1099         /* flags look ok - update the global security flags for cifs module */
1100         global_secflags = flags;
1101         if (global_secflags & CIFSSEC_MUST_SIGN) {
1102                 /* requiring signing implies signing is allowed */
1103                 global_secflags |= CIFSSEC_MAY_SIGN;
1104                 cifs_dbg(FYI, "packet signing now required\n");
1105         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1106                 cifs_dbg(FYI, "packet signing disabled\n");
1107         }
1108         /* BB should we turn on MAY flags for other MUST options? */
1109         return count;
1110 }
1111
1112 static const struct proc_ops cifs_security_flags_proc_ops = {
1113         .proc_open      = cifs_security_flags_proc_open,
1114         .proc_read      = seq_read,
1115         .proc_lseek     = seq_lseek,
1116         .proc_release   = single_release,
1117         .proc_write     = cifs_security_flags_proc_write,
1118 };
1119
1120 /* To make it easier to debug, can help to show mount params */
1121 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1122 {
1123         const struct fs_parameter_spec *p;
1124         const char *type;
1125
1126         for (p = smb3_fs_parameters; p->name; p++) {
1127                 /* cannot use switch with pointers... */
1128                 if (!p->type) {
1129                         if (p->flags == fs_param_neg_with_no)
1130                                 type = "noflag";
1131                         else
1132                                 type = "flag";
1133                 } else if (p->type == fs_param_is_bool)
1134                         type = "bool";
1135                 else if (p->type == fs_param_is_u32)
1136                         type = "u32";
1137                 else if (p->type == fs_param_is_u64)
1138                         type = "u64";
1139                 else if (p->type == fs_param_is_string)
1140                         type = "string";
1141                 else
1142                         type = "unknown";
1143
1144                 seq_printf(m, "%s:%s\n", p->name, type);
1145         }
1146
1147         return 0;
1148 }
1149
1150 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1151 {
1152         return single_open(file, cifs_mount_params_proc_show, NULL);
1153 }
1154
1155 static const struct proc_ops cifs_mount_params_proc_ops = {
1156         .proc_open      = cifs_mount_params_proc_open,
1157         .proc_read      = seq_read,
1158         .proc_lseek     = seq_lseek,
1159         .proc_release   = single_release,
1160         /* No need for write for now */
1161         /* .proc_write  = cifs_mount_params_proc_write, */
1162 };
1163
1164 #else
1165 inline void cifs_proc_init(void)
1166 {
1167 }
1168
1169 inline void cifs_proc_clean(void)
1170 {
1171 }
1172 #endif /* PROC_FS */