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 Wct: %d\n",
  44                  smb->Command, smb->Status.CifsError, smb->Flags,
  45                  smb->Flags2, smb->Mid, smb->Pid, smb->WordCount);
  46         if (!server->ops->check_message(buf, server->total_read, server)) {
  47                 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  48                          server->ops->calc_smb_size(smb));
  49         }
  50 #endif /* CONFIG_CIFS_DEBUG2 */
  51 }
  52
  53 void cifs_dump_mids(struct TCP_Server_Info *server)
  54 {
  55 #ifdef CONFIG_CIFS_DEBUG2
  56         struct mid_q_entry *mid_entry;
  57
  58         if (server == NULL)
  59                 return;
  60
  61         cifs_dbg(VFS, "Dump pending requests:\n");
  62         spin_lock(&server->mid_lock);
  63         list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
  64                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  65                          mid_entry->mid_state,
  66                          le16_to_cpu(mid_entry->command),
  67                          mid_entry->pid,
  68                          mid_entry->callback_data,
  69                          mid_entry->mid);
  70 #ifdef CONFIG_CIFS_STATS2
  71                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  72                          mid_entry->large_buf,
  73                          mid_entry->resp_buf,
  74                          mid_entry->when_received,
  75                          jiffies);
  76 #endif /* STATS2 */
  77                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  78                          mid_entry->multiRsp, mid_entry->multiEnd);
  79                 if (mid_entry->resp_buf) {
  80                         cifs_dump_detail(mid_entry->resp_buf, server);
  81                         cifs_dump_mem("existing buf: ",
  82                                 mid_entry->resp_buf, 62);
  83                 }
  84         }
  85         spin_unlock(&server->mid_lock);
  86 #endif /* CONFIG_CIFS_DEBUG2 */
  87 }
  88
  89 #ifdef CONFIG_PROC_FS
  90 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  91 {
  92         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  93
  94         seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
  95         if (tcon->nativeFileSystem)
  96                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  97         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  98                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  99                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 100                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 101                    tcon->status);
 102         if (dev_type == FILE_DEVICE_DISK)
 103                 seq_puts(m, " type: DISK ");
 104         else if (dev_type == FILE_DEVICE_CD_ROM)
 105                 seq_puts(m, " type: CDROM ");
 106         else
 107                 seq_printf(m, " type: %d ", dev_type);
 108
 109         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 110
 111         if ((tcon->seal) ||
 112             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 113             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 114                 seq_puts(m, " encrypted");
 115         if (tcon->nocase)
 116                 seq_printf(m, " nocase");
 117         if (tcon->unix_ext)
 118                 seq_printf(m, " POSIX Extensions");
 119         if (tcon->ses->server->ops->dump_share_caps)
 120                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 121         if (tcon->use_witness)
 122                 seq_puts(m, " Witness");
 123         if (tcon->broken_sparse_sup)
 124                 seq_puts(m, " nosparse");
 125         if (tcon->need_reconnect)
 126                 seq_puts(m, "\tDISCONNECTED ");
 127         spin_lock(&tcon->tc_lock);
 128         if (tcon->origin_fullpath) {
 129                 seq_printf(m, "\n\tDFS origin fullpath: %s",
 130                            tcon->origin_fullpath);
 131         }
 132         spin_unlock(&tcon->tc_lock);
 133         seq_putc(m, '\n');
 134 }
 135
 136 static void
 137 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 138 {
 139         struct TCP_Server_Info *server = chan->server;
 140
 141         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 142                    "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
 143                    "\n\t\tTCP status: %d Instance: %d"
 144                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 145                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 146                    i+1, server->conn_id,
 147                    server->credits,
 148                    server->echo_credits,
 149                    server->oplock_credits,
 150                    server->dialect,
 151                    server->tcpStatus,
 152                    server->reconnect_instance,
 153                    server->srv_count,
 154                    server->sec_mode,
 155                    in_flight(server),
 156                    atomic_read(&server->in_send),
 157                    atomic_read(&server->num_waiters));
 158 #ifdef CONFIG_NET_NS
 159         if (server->net)
 160                 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
 161 #endif /* NET_NS */
 162
 163 }
 164
 165 static inline const char *smb_speed_to_str(size_t bps)
 166 {
 167         size_t mbps = bps / 1000 / 1000;
 168
 169         switch (mbps) {
 170         case SPEED_10:
 171                 return "10Mbps";
 172         case SPEED_100:
 173                 return "100Mbps";
 174         case SPEED_1000:
 175                 return "1Gbps";
 176         case SPEED_2500:
 177                 return "2.5Gbps";
 178         case SPEED_5000:
 179                 return "5Gbps";
 180         case SPEED_10000:
 181                 return "10Gbps";
 182         case SPEED_14000:
 183                 return "14Gbps";
 184         case SPEED_20000:
 185                 return "20Gbps";
 186         case SPEED_25000:
 187                 return "25Gbps";
 188         case SPEED_40000:
 189                 return "40Gbps";
 190         case SPEED_50000:
 191                 return "50Gbps";
 192         case SPEED_56000:
 193                 return "56Gbps";
 194         case SPEED_100000:
 195                 return "100Gbps";
 196         case SPEED_200000:
 197                 return "200Gbps";
 198         case SPEED_400000:
 199                 return "400Gbps";
 200         case SPEED_800000:
 201                 return "800Gbps";
 202         default:
 203                 return "Unknown";
 204         }
 205 }
 206
 207 static void
 208 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 209 {
 210         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 211         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 212
 213         seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
 214         seq_puts(m, "\t\tCapabilities: ");
 215         if (iface->rdma_capable)
 216                 seq_puts(m, "rdma ");
 217         if (iface->rss_capable)
 218                 seq_puts(m, "rss ");
 219         if (!iface->rdma_capable && !iface->rss_capable)
 220                 seq_puts(m, "None");
 221         seq_putc(m, '\n');
 222         if (iface->sockaddr.ss_family == AF_INET)
 223                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 224         else if (iface->sockaddr.ss_family == AF_INET6)
 225                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 226         if (!iface->is_active)
 227                 seq_puts(m, "\t\t[for-cleanup]\n");
 228 }
 229
 230 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 231 {
 232         struct TCP_Server_Info *server;
 233         struct cifs_ses *ses;
 234         struct cifs_tcon *tcon;
 235         struct cifsFileInfo *cfile;
 236
 237         seq_puts(m, "# Version:1\n");
 238         seq_puts(m, "# Format:\n");
 239         seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
 240 #ifdef CONFIG_CIFS_DEBUG2
 241         seq_printf(m, " <filename> <mid>\n");
 242 #else
 243         seq_printf(m, " <filename>\n");
 244 #endif /* CIFS_DEBUG2 */
 245         spin_lock(&cifs_tcp_ses_lock);
 246         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 247                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 248                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 249                                 spin_lock(&tcon->open_file_lock);
 250                                 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
 251                                         seq_printf(m,
 252                                                 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
 253                                                 tcon->tid,
 254                                                 ses->Suid,
 255                                                 cfile->fid.persistent_fid,
 256                                                 cfile->f_flags,
 257                                                 cfile->count,
 258                                                 cfile->pid,
 259                                                 from_kuid(&init_user_ns, cfile->uid),
 260                                                 cfile->dentry);
 261 #ifdef CONFIG_CIFS_DEBUG2
 262                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 263 #else
 264                                         seq_printf(m, "\n");
 265 #endif /* CIFS_DEBUG2 */
 266                                 }
 267                                 spin_unlock(&tcon->open_file_lock);
 268                         }
 269                 }
 270         }
 271         spin_unlock(&cifs_tcp_ses_lock);
 272         seq_putc(m, '\n');
 273         return 0;
 274 }
 275
 276 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 277 {
 278         struct mid_q_entry *mid_entry;
 279         struct TCP_Server_Info *server;
 280         struct TCP_Server_Info *chan_server;
 281         struct cifs_ses *ses;
 282         struct cifs_tcon *tcon;
 283         struct cifs_server_iface *iface;
 284         size_t iface_weight = 0, iface_min_speed = 0;
 285         struct cifs_server_iface *last_iface = NULL;
 286         int c, i, j;
 287
 288         seq_puts(m,
 289                     "Display Internal CIFS Data Structures for Debugging\n"
 290                     "---------------------------------------------------\n");
 291         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 292         seq_printf(m, "Features:");
 293 #ifdef CONFIG_CIFS_DFS_UPCALL
 294         seq_printf(m, " DFS");
 295 #endif
 296 #ifdef CONFIG_CIFS_FSCACHE
 297         seq_printf(m, ",FSCACHE");
 298 #endif
 299 #ifdef CONFIG_CIFS_SMB_DIRECT
 300         seq_printf(m, ",SMB_DIRECT");
 301 #endif
 302 #ifdef CONFIG_CIFS_STATS2
 303         seq_printf(m, ",STATS2");
 304 #else
 305         seq_printf(m, ",STATS");
 306 #endif
 307 #ifdef CONFIG_CIFS_DEBUG2
 308         seq_printf(m, ",DEBUG2");
 309 #elif defined(CONFIG_CIFS_DEBUG)
 310         seq_printf(m, ",DEBUG");
 311 #endif
 312 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 313         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 314 #endif
 315 #ifdef CONFIG_CIFS_POSIX
 316         seq_printf(m, ",CIFS_POSIX");
 317 #endif
 318 #ifdef CONFIG_CIFS_UPCALL
 319         seq_printf(m, ",UPCALL(SPNEGO)");
 320 #endif
 321 #ifdef CONFIG_CIFS_XATTR
 322         seq_printf(m, ",XATTR");
 323 #endif
 324         seq_printf(m, ",ACL");
 325 #ifdef CONFIG_CIFS_SWN_UPCALL
 326         seq_puts(m, ",WITNESS");
 327 #endif
 328         seq_putc(m, '\n');
 329         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 330         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 331
 332         seq_printf(m, "\nServers: ");
 333
 334         c = 0;
 335         spin_lock(&cifs_tcp_ses_lock);
 336         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 337                 /* channel info will be printed as a part of sessions below */
 338                 if (SERVER_IS_CHAN(server))
 339                         continue;
 340
 341                 c++;
 342                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 343                         c, server->conn_id);
 344
 345                 spin_lock(&server->srv_lock);
 346                 if (server->hostname)
 347                         seq_printf(m, "Hostname: %s ", server->hostname);
 348                 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
 349                 spin_unlock(&server->srv_lock);
 350 #ifdef CONFIG_CIFS_SMB_DIRECT
 351                 if (!server->rdma)
 352                         goto skip_rdma;
 353
 354                 if (!server->smbd_conn) {
 355                         seq_printf(m, "\nSMBDirect transport not available");
 356                         goto skip_rdma;
 357                 }
 358
 359                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 360                         "transport status: %x",
 361                         server->smbd_conn->protocol,
 362                         server->smbd_conn->transport_status);
 363                 seq_printf(m, "\nConn receive_credit_max: %x "
 364                         "send_credit_target: %x max_send_size: %x",
 365                         server->smbd_conn->receive_credit_max,
 366                         server->smbd_conn->send_credit_target,
 367                         server->smbd_conn->max_send_size);
 368                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 369                         "max_fragmented_send_size: %x max_receive_size:%x",
 370                         server->smbd_conn->max_fragmented_recv_size,
 371                         server->smbd_conn->max_fragmented_send_size,
 372                         server->smbd_conn->max_receive_size);
 373                 seq_printf(m, "\nConn keep_alive_interval: %x "
 374                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 375                         server->smbd_conn->keep_alive_interval,
 376                         server->smbd_conn->max_readwrite_size,
 377                         server->smbd_conn->rdma_readwrite_threshold);
 378                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 379                         "count_put_receive_buffer: %x count_send_empty: %x",
 380                         server->smbd_conn->count_get_receive_buffer,
 381                         server->smbd_conn->count_put_receive_buffer,
 382                         server->smbd_conn->count_send_empty);
 383                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 384                         "count_enqueue_reassembly_queue: %x "
 385                         "count_dequeue_reassembly_queue: %x "
 386                         "fragment_reassembly_remaining: %x "
 387                         "reassembly_data_length: %x "
 388                         "reassembly_queue_length: %x",
 389                         server->smbd_conn->count_reassembly_queue,
 390                         server->smbd_conn->count_enqueue_reassembly_queue,
 391                         server->smbd_conn->count_dequeue_reassembly_queue,
 392                         server->smbd_conn->fragment_reassembly_remaining,
 393                         server->smbd_conn->reassembly_data_length,
 394                         server->smbd_conn->reassembly_queue_length);
 395                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 396                         "receive_credits: %x receive_credit_target: %x",
 397                         atomic_read(&server->smbd_conn->send_credits),
 398                         atomic_read(&server->smbd_conn->receive_credits),
 399                         server->smbd_conn->receive_credit_target);
 400                 seq_printf(m, "\nPending send_pending: %x ",
 401                         atomic_read(&server->smbd_conn->send_pending));
 402                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 403                         "count_empty_packet_queue: %x",
 404                         server->smbd_conn->count_receive_queue,
 405                         server->smbd_conn->count_empty_packet_queue);
 406                 seq_printf(m, "\nMR responder_resources: %x "
 407                         "max_frmr_depth: %x mr_type: %x",
 408                         server->smbd_conn->responder_resources,
 409                         server->smbd_conn->max_frmr_depth,
 410                         server->smbd_conn->mr_type);
 411                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 412                         atomic_read(&server->smbd_conn->mr_ready_count),
 413                         atomic_read(&server->smbd_conn->mr_used_count));
 414 skip_rdma:
 415 #endif
 416                 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
 417                         server->credits,
 418                         server->echo_credits,
 419                         server->oplock_credits,
 420                         server->dialect);
 421                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 422                         seq_printf(m, " COMPRESS_LZNT1");
 423                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 424                         seq_printf(m, " COMPRESS_LZ77");
 425                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 426                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 427                 if (server->sign)
 428                         seq_printf(m, " signed");
 429                 if (server->posix_ext_supported)
 430                         seq_printf(m, " posix");
 431                 if (server->nosharesock)
 432                         seq_printf(m, " nosharesock");
 433
 434                 if (server->rdma)
 435                         seq_printf(m, "\nRDMA ");
 436                 seq_printf(m, "\nTCP status: %d Instance: %d"
 437                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 438                                 server->tcpStatus,
 439                                 server->reconnect_instance,
 440                                 server->srv_count,
 441                                 server->sec_mode, in_flight(server));
 442 #ifdef CONFIG_NET_NS
 443                 if (server->net)
 444                         seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
 445 #endif /* NET_NS */
 446
 447                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 448                                 atomic_read(&server->in_send),
 449                                 atomic_read(&server->num_waiters));
 450
 451                 if (server->leaf_fullpath) {
 452                         seq_printf(m, "\nDFS leaf full path: %s",
 453                                    server->leaf_fullpath);
 454                 }
 455
 456                 seq_printf(m, "\n\n\tSessions: ");
 457                 i = 0;
 458                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 459                         spin_lock(&ses->ses_lock);
 460                         if (ses->ses_status == SES_EXITING) {
 461                                 spin_unlock(&ses->ses_lock);
 462                                 continue;
 463                         }
 464                         i++;
 465                         if ((ses->serverDomain == NULL) ||
 466                                 (ses->serverOS == NULL) ||
 467                                 (ses->serverNOS == NULL)) {
 468                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 469                                         i, ses->ip_addr, ses->ses_count,
 470                                         ses->capabilities, ses->ses_status);
 471                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 472                                         seq_printf(m, "Guest ");
 473                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 474                                         seq_printf(m, "Anonymous ");
 475                         } else {
 476                                 seq_printf(m,
 477                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 478                                     "\n\tNOS: %s\tCapability: 0x%x"
 479                                         "\n\tSMB session status: %d ",
 480                                 i, ses->ip_addr, ses->serverDomain,
 481                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 482                                 ses->capabilities, ses->ses_status);
 483                         }
 484                         spin_unlock(&ses->ses_lock);
 485
 486                         seq_printf(m, "\n\tSecurity type: %s ",
 487                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 488
 489                         /* dump session id helpful for use with network trace */
 490                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 491                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
 492                                 seq_puts(m, " encrypted");
 493                                 /* can help in debugging to show encryption type */
 494                                 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
 495                                         seq_puts(m, "(gcm256)");
 496                         }
 497                         if (ses->sign)
 498                                 seq_puts(m, " signed");
 499
 500                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 501                                    from_kuid(&init_user_ns, ses->linux_uid),
 502                                    from_kuid(&init_user_ns, ses->cred_uid));
 503
 504                         if (ses->dfs_root_ses) {
 505                                 seq_printf(m, "\n\tDFS root session id: 0x%llx",
 506                                            ses->dfs_root_ses->Suid);
 507                         }
 508
 509                         spin_lock(&ses->chan_lock);
 510                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
 511                                 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
 512                         if (CIFS_CHAN_IN_RECONNECT(ses, 0))
 513                                 seq_puts(m, "\t[RECONNECTING] ");
 514
 515                         if (ses->chan_count > 1) {
 516                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 517                                            ses->chan_count-1);
 518                                 for (j = 1; j < ses->chan_count; j++) {
 519                                         cifs_dump_channel(m, j, &ses->chans[j]);
 520                                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
 521                                                 seq_puts(m, "\tDISCONNECTED ");
 522                                         if (CIFS_CHAN_IN_RECONNECT(ses, j))
 523                                                 seq_puts(m, "\t[RECONNECTING] ");
 524                                 }
 525                         }
 526                         spin_unlock(&ses->chan_lock);
 527
 528                         seq_puts(m, "\n\n\tShares: ");
 529                         j = 0;
 530
 531                         seq_printf(m, "\n\t%d) IPC: ", j);
 532                         if (ses->tcon_ipc)
 533                                 cifs_debug_tcon(m, ses->tcon_ipc);
 534                         else
 535                                 seq_puts(m, "none\n");
 536
 537                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 538                                 ++j;
 539                                 seq_printf(m, "\n\t%d) ", j);
 540                                 cifs_debug_tcon(m, tcon);
 541                         }
 542
 543                         spin_lock(&ses->iface_lock);
 544                         if (ses->iface_count)
 545                                 seq_printf(m, "\n\n\tServer interfaces: %zu"
 546                                            "\tLast updated: %lu seconds ago",
 547                                            ses->iface_count,
 548                                            (jiffies - ses->iface_last_update) / HZ);
 549
 550                         last_iface = list_last_entry(&ses->iface_list,
 551                                                      struct cifs_server_iface,
 552                                                      iface_head);
 553                         iface_min_speed = last_iface->speed;
 554
 555                         j = 0;
 556                         list_for_each_entry(iface, &ses->iface_list,
 557                                                  iface_head) {
 558                                 seq_printf(m, "\n\t%d)", ++j);
 559                                 cifs_dump_iface(m, iface);
 560
 561                                 iface_weight = iface->speed / iface_min_speed;
 562                                 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
 563                                            "\n\t\tAllocated channels: %u\n",
 564                                            iface->weight_fulfilled,
 565                                            iface_weight,
 566                                            iface->num_channels);
 567
 568                                 if (is_ses_using_iface(ses, iface))
 569                                         seq_puts(m, "\t\t[CONNECTED]\n");
 570                         }
 571                         spin_unlock(&ses->iface_lock);
 572
 573                         seq_puts(m, "\n\n\tMIDs: ");
 574                         spin_lock(&ses->chan_lock);
 575                         for (j = 0; j < ses->chan_count; j++) {
 576                                 chan_server = ses->chans[j].server;
 577                                 if (!chan_server)
 578                                         continue;
 579
 580                                 if (list_empty(&chan_server->pending_mid_q))
 581                                         continue;
 582
 583                                 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
 584                                            chan_server->conn_id);
 585                                 spin_lock(&chan_server->mid_lock);
 586                                 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
 587                                         seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
 588                                                    mid_entry->mid_state,
 589                                                    le16_to_cpu(mid_entry->command),
 590                                                    mid_entry->pid,
 591                                                    mid_entry->callback_data,
 592                                                    mid_entry->mid);
 593                                 }
 594                                 spin_unlock(&chan_server->mid_lock);
 595                         }
 596                         spin_unlock(&ses->chan_lock);
 597                         seq_puts(m, "\n--\n");
 598                 }
 599                 if (i == 0)
 600                         seq_printf(m, "\n\t\t[NONE]");
 601         }
 602         if (c == 0)
 603                 seq_printf(m, "\n\t[NONE]");
 604
 605         spin_unlock(&cifs_tcp_ses_lock);
 606         seq_putc(m, '\n');
 607         cifs_swn_dump(m);
 608
 609         /* BB add code to dump additional info such as TCP session info now */
 610         return 0;
 611 }
 612
 613 static ssize_t cifs_stats_proc_write(struct file *file,
 614                 const char __user *buffer, size_t count, loff_t *ppos)
 615 {
 616         bool bv;
 617         int rc;
 618         struct TCP_Server_Info *server;
 619         struct cifs_ses *ses;
 620         struct cifs_tcon *tcon;
 621
 622         rc = kstrtobool_from_user(buffer, count, &bv);
 623         if (rc == 0) {
 624 #ifdef CONFIG_CIFS_STATS2
 625                 int i;
 626
 627                 atomic_set(&total_buf_alloc_count, 0);
 628                 atomic_set(&total_small_buf_alloc_count, 0);
 629 #endif /* CONFIG_CIFS_STATS2 */
 630                 atomic_set(&tcpSesReconnectCount, 0);
 631                 atomic_set(&tconInfoReconnectCount, 0);
 632
 633                 spin_lock(&GlobalMid_Lock);
 634                 GlobalMaxActiveXid = 0;
 635                 GlobalCurrentXid = 0;
 636                 spin_unlock(&GlobalMid_Lock);
 637                 spin_lock(&cifs_tcp_ses_lock);
 638                 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 639                         server->max_in_flight = 0;
 640 #ifdef CONFIG_CIFS_STATS2
 641                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 642                                 atomic_set(&server->num_cmds[i], 0);
 643                                 atomic_set(&server->smb2slowcmd[i], 0);
 644                                 server->time_per_cmd[i] = 0;
 645                                 server->slowest_cmd[i] = 0;
 646                                 server->fastest_cmd[0] = 0;
 647                         }
 648 #endif /* CONFIG_CIFS_STATS2 */
 649                         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 650                                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 651                                         atomic_set(&tcon->num_smbs_sent, 0);
 652                                         spin_lock(&tcon->stat_lock);
 653                                         tcon->bytes_read = 0;
 654                                         tcon->bytes_written = 0;
 655                                         spin_unlock(&tcon->stat_lock);
 656                                         if (server->ops->clear_stats)
 657                                                 server->ops->clear_stats(tcon);
 658                                 }
 659                         }
 660                 }
 661                 spin_unlock(&cifs_tcp_ses_lock);
 662         } else {
 663                 return rc;
 664         }
 665
 666         return count;
 667 }
 668
 669 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 670 {
 671         int i;
 672 #ifdef CONFIG_CIFS_STATS2
 673         int j;
 674 #endif /* STATS2 */
 675         struct TCP_Server_Info *server;
 676         struct cifs_ses *ses;
 677         struct cifs_tcon *tcon;
 678
 679         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 680                         sesInfoAllocCount.counter);
 681         seq_printf(m, "Share (unique mount targets): %d\n",
 682                         tconInfoAllocCount.counter);
 683         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 684                         buf_alloc_count.counter,
 685                         cifs_min_rcv + tcpSesAllocCount.counter);
 686         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 687                         small_buf_alloc_count.counter, cifs_min_small);
 688 #ifdef CONFIG_CIFS_STATS2
 689         seq_printf(m, "Total Large %d Small %d Allocations\n",
 690                                 atomic_read(&total_buf_alloc_count),
 691                                 atomic_read(&total_small_buf_alloc_count));
 692 #endif /* CONFIG_CIFS_STATS2 */
 693
 694         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
 695         seq_printf(m,
 696                 "\n%d session %d share reconnects\n",
 697                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 698
 699         seq_printf(m,
 700                 "Total vfs operations: %d maximum at one time: %d\n",
 701                 GlobalCurrentXid, GlobalMaxActiveXid);
 702
 703         i = 0;
 704         spin_lock(&cifs_tcp_ses_lock);
 705         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 706                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 707 #ifdef CONFIG_CIFS_STATS2
 708                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 709                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 710                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 711                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 712                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 713                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 714                                 atomic_read(&server->num_cmds[j]),
 715                                 server->time_per_cmd[j],
 716                                 server->fastest_cmd[j],
 717                                 server->slowest_cmd[j]);
 718                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 719                         if (atomic_read(&server->smb2slowcmd[j])) {
 720                                 spin_lock(&server->srv_lock);
 721                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 722                                         atomic_read(&server->smb2slowcmd[j]),
 723                                         server->hostname, j);
 724                                 spin_unlock(&server->srv_lock);
 725                         }
 726 #endif /* STATS2 */
 727                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 728                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 729                                 i++;
 730                                 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
 731                                 if (tcon->need_reconnect)
 732                                         seq_puts(m, "\tDISCONNECTED ");
 733                                 seq_printf(m, "\nSMBs: %d",
 734                                            atomic_read(&tcon->num_smbs_sent));
 735                                 if (server->ops->print_stats)
 736                                         server->ops->print_stats(m, tcon);
 737                         }
 738                 }
 739         }
 740         spin_unlock(&cifs_tcp_ses_lock);
 741
 742         seq_putc(m, '\n');
 743         return 0;
 744 }
 745
 746 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 747 {
 748         return single_open(file, cifs_stats_proc_show, NULL);
 749 }
 750
 751 static const struct proc_ops cifs_stats_proc_ops = {
 752         .proc_open      = cifs_stats_proc_open,
 753         .proc_read      = seq_read,
 754         .proc_lseek     = seq_lseek,
 755         .proc_release   = single_release,
 756         .proc_write     = cifs_stats_proc_write,
 757 };
 758
 759 #ifdef CONFIG_CIFS_SMB_DIRECT
 760 #define PROC_FILE_DEFINE(name) \
 761 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 762         size_t count, loff_t *ppos) \
 763 { \
 764         int rc; \
 765         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 766         if (rc) \
 767                 return rc; \
 768         return count; \
 769 } \
 770 static int name##_proc_show(struct seq_file *m, void *v) \
 771 { \
 772         seq_printf(m, "%d\n", name ); \
 773         return 0; \
 774 } \
 775 static int name##_open(struct inode *inode, struct file *file) \
 776 { \
 777         return single_open(file, name##_proc_show, NULL); \
 778 } \
 779 \
 780 static const struct proc_ops cifs_##name##_proc_fops = { \
 781         .proc_open      = name##_open, \
 782         .proc_read      = seq_read, \
 783         .proc_lseek     = seq_lseek, \
 784         .proc_release   = single_release, \
 785         .proc_write     = name##_write, \
 786 }
 787
 788 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 789 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 790 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 791 PROC_FILE_DEFINE(smbd_max_receive_size);
 792 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 793 PROC_FILE_DEFINE(smbd_max_send_size);
 794 PROC_FILE_DEFINE(smbd_send_credit_target);
 795 PROC_FILE_DEFINE(smbd_receive_credit_max);
 796 #endif
 797
 798 static struct proc_dir_entry *proc_fs_cifs;
 799 static const struct proc_ops cifsFYI_proc_ops;
 800 static const struct proc_ops cifs_lookup_cache_proc_ops;
 801 static const struct proc_ops traceSMB_proc_ops;
 802 static const struct proc_ops cifs_security_flags_proc_ops;
 803 static const struct proc_ops cifs_linux_ext_proc_ops;
 804 static const struct proc_ops cifs_mount_params_proc_ops;
 805
 806 void
 807 cifs_proc_init(void)
 808 {
 809         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 810         if (proc_fs_cifs == NULL)
 811                 return;
 812
 813         proc_create_single("DebugData", 0, proc_fs_cifs,
 814                         cifs_debug_data_proc_show);
 815
 816         proc_create_single("open_files", 0400, proc_fs_cifs,
 817                         cifs_debug_files_proc_show);
 818
 819         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 820         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 821         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 822         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 823                     &cifs_linux_ext_proc_ops);
 824         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 825                     &cifs_security_flags_proc_ops);
 826         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 827                     &cifs_lookup_cache_proc_ops);
 828
 829         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 830
 831 #ifdef CONFIG_CIFS_DFS_UPCALL
 832         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 833 #endif
 834
 835 #ifdef CONFIG_CIFS_SMB_DIRECT
 836         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 837                 &cifs_rdma_readwrite_threshold_proc_fops);
 838         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 839                 &cifs_smbd_max_frmr_depth_proc_fops);
 840         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 841                 &cifs_smbd_keep_alive_interval_proc_fops);
 842         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 843                 &cifs_smbd_max_receive_size_proc_fops);
 844         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 845                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 846         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 847                 &cifs_smbd_max_send_size_proc_fops);
 848         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 849                 &cifs_smbd_send_credit_target_proc_fops);
 850         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 851                 &cifs_smbd_receive_credit_max_proc_fops);
 852 #endif
 853 }
 854
 855 void
 856 cifs_proc_clean(void)
 857 {
 858         if (proc_fs_cifs == NULL)
 859                 return;
 860
 861         remove_proc_entry("DebugData", proc_fs_cifs);
 862         remove_proc_entry("open_files", proc_fs_cifs);
 863         remove_proc_entry("cifsFYI", proc_fs_cifs);
 864         remove_proc_entry("traceSMB", proc_fs_cifs);
 865         remove_proc_entry("Stats", proc_fs_cifs);
 866         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 867         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 868         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 869         remove_proc_entry("mount_params", proc_fs_cifs);
 870
 871 #ifdef CONFIG_CIFS_DFS_UPCALL
 872         remove_proc_entry("dfscache", proc_fs_cifs);
 873 #endif
 874 #ifdef CONFIG_CIFS_SMB_DIRECT
 875         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 876         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 877         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 878         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 879         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 880         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 881         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 882         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 883 #endif
 884         remove_proc_entry("fs/cifs", NULL);
 885 }
 886
 887 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 888 {
 889         seq_printf(m, "%d\n", cifsFYI);
 890         return 0;
 891 }
 892
 893 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 894 {
 895         return single_open(file, cifsFYI_proc_show, NULL);
 896 }
 897
 898 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 899                 size_t count, loff_t *ppos)
 900 {
 901         char c[2] = { '\0' };
 902         bool bv;
 903         int rc;
 904
 905         rc = get_user(c[0], buffer);
 906         if (rc)
 907                 return rc;
 908         if (kstrtobool(c, &bv) == 0)
 909                 cifsFYI = bv;
 910         else if ((c[0] > '1') && (c[0] <= '9'))
 911                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 912         else
 913                 return -EINVAL;
 914
 915         return count;
 916 }
 917
 918 static const struct proc_ops cifsFYI_proc_ops = {
 919         .proc_open      = cifsFYI_proc_open,
 920         .proc_read      = seq_read,
 921         .proc_lseek     = seq_lseek,
 922         .proc_release   = single_release,
 923         .proc_write     = cifsFYI_proc_write,
 924 };
 925
 926 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 927 {
 928         seq_printf(m, "%d\n", linuxExtEnabled);
 929         return 0;
 930 }
 931
 932 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 933 {
 934         return single_open(file, cifs_linux_ext_proc_show, NULL);
 935 }
 936
 937 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 938                 const char __user *buffer, size_t count, loff_t *ppos)
 939 {
 940         int rc;
 941
 942         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 943         if (rc)
 944                 return rc;
 945
 946         return count;
 947 }
 948
 949 static const struct proc_ops cifs_linux_ext_proc_ops = {
 950         .proc_open      = cifs_linux_ext_proc_open,
 951         .proc_read      = seq_read,
 952         .proc_lseek     = seq_lseek,
 953         .proc_release   = single_release,
 954         .proc_write     = cifs_linux_ext_proc_write,
 955 };
 956
 957 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 958 {
 959         seq_printf(m, "%d\n", lookupCacheEnabled);
 960         return 0;
 961 }
 962
 963 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 964 {
 965         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 966 }
 967
 968 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 969                 const char __user *buffer, size_t count, loff_t *ppos)
 970 {
 971         int rc;
 972
 973         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 974         if (rc)
 975                 return rc;
 976
 977         return count;
 978 }
 979
 980 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 981         .proc_open      = cifs_lookup_cache_proc_open,
 982         .proc_read      = seq_read,
 983         .proc_lseek     = seq_lseek,
 984         .proc_release   = single_release,
 985         .proc_write     = cifs_lookup_cache_proc_write,
 986 };
 987
 988 static int traceSMB_proc_show(struct seq_file *m, void *v)
 989 {
 990         seq_printf(m, "%d\n", traceSMB);
 991         return 0;
 992 }
 993
 994 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 995 {
 996         return single_open(file, traceSMB_proc_show, NULL);
 997 }
 998
 999 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1000                 size_t count, loff_t *ppos)
1001 {
1002         int rc;
1003
1004         rc = kstrtobool_from_user(buffer, count, &traceSMB);
1005         if (rc)
1006                 return rc;
1007
1008         return count;
1009 }
1010
1011 static const struct proc_ops traceSMB_proc_ops = {
1012         .proc_open      = traceSMB_proc_open,
1013         .proc_read      = seq_read,
1014         .proc_lseek     = seq_lseek,
1015         .proc_release   = single_release,
1016         .proc_write     = traceSMB_proc_write,
1017 };
1018
1019 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1020 {
1021         seq_printf(m, "0x%x\n", global_secflags);
1022         return 0;
1023 }
1024
1025 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1026 {
1027         return single_open(file, cifs_security_flags_proc_show, NULL);
1028 }
1029
1030 /*
1031  * Ensure that if someone sets a MUST flag, that we disable all other MAY
1032  * flags except for the ones corresponding to the given MUST flag. If there are
1033  * multiple MUST flags, then try to prefer more secure ones.
1034  */
1035 static void
1036 cifs_security_flags_handle_must_flags(unsigned int *flags)
1037 {
1038         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
1039
1040         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1041                 *flags = CIFSSEC_MUST_KRB5;
1042         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1043                 *flags = CIFSSEC_MUST_NTLMSSP;
1044         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1045                 *flags = CIFSSEC_MUST_NTLMV2;
1046
1047         *flags |= signflags;
1048 }
1049
1050 static ssize_t cifs_security_flags_proc_write(struct file *file,
1051                 const char __user *buffer, size_t count, loff_t *ppos)
1052 {
1053         int rc;
1054         unsigned int flags;
1055         char flags_string[12];
1056         bool bv;
1057
1058         if ((count < 1) || (count > 11))
1059                 return -EINVAL;
1060
1061         memset(flags_string, 0, 12);
1062
1063         if (copy_from_user(flags_string, buffer, count))
1064                 return -EFAULT;
1065
1066         if (count < 3) {
1067                 /* single char or single char followed by null */
1068                 if (kstrtobool(flags_string, &bv) == 0) {
1069                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1070                         return count;
1071                 } else if (!isdigit(flags_string[0])) {
1072                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1073                                         flags_string);
1074                         return -EINVAL;
1075                 }
1076         }
1077
1078         /* else we have a number */
1079         rc = kstrtouint(flags_string, 0, &flags);
1080         if (rc) {
1081                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1082                                 flags_string);
1083                 return rc;
1084         }
1085
1086         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1087
1088         if (flags == 0)  {
1089                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1090                 return -EINVAL;
1091         }
1092
1093         if (flags & ~CIFSSEC_MASK) {
1094                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1095                          flags & ~CIFSSEC_MASK);
1096                 return -EINVAL;
1097         }
1098
1099         cifs_security_flags_handle_must_flags(&flags);
1100
1101         /* flags look ok - update the global security flags for cifs module */
1102         global_secflags = flags;
1103         if (global_secflags & CIFSSEC_MUST_SIGN) {
1104                 /* requiring signing implies signing is allowed */
1105                 global_secflags |= CIFSSEC_MAY_SIGN;
1106                 cifs_dbg(FYI, "packet signing now required\n");
1107         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1108                 cifs_dbg(FYI, "packet signing disabled\n");
1109         }
1110         /* BB should we turn on MAY flags for other MUST options? */
1111         return count;
1112 }
1113
1114 static const struct proc_ops cifs_security_flags_proc_ops = {
1115         .proc_open      = cifs_security_flags_proc_open,
1116         .proc_read      = seq_read,
1117         .proc_lseek     = seq_lseek,
1118         .proc_release   = single_release,
1119         .proc_write     = cifs_security_flags_proc_write,
1120 };
1121
1122 /* To make it easier to debug, can help to show mount params */
1123 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1124 {
1125         const struct fs_parameter_spec *p;
1126         const char *type;
1127
1128         for (p = smb3_fs_parameters; p->name; p++) {
1129                 /* cannot use switch with pointers... */
1130                 if (!p->type) {
1131                         if (p->flags == fs_param_neg_with_no)
1132                                 type = "noflag";
1133                         else
1134                                 type = "flag";
1135                 } else if (p->type == fs_param_is_bool)
1136                         type = "bool";
1137                 else if (p->type == fs_param_is_u32)
1138                         type = "u32";
1139                 else if (p->type == fs_param_is_u64)
1140                         type = "u64";
1141                 else if (p->type == fs_param_is_string)
1142                         type = "string";
1143                 else
1144                         type = "unknown";
1145
1146                 seq_printf(m, "%s:%s\n", p->name, type);
1147         }
1148
1149         return 0;
1150 }
1151
1152 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1153 {
1154         return single_open(file, cifs_mount_params_proc_show, NULL);
1155 }
1156
1157 static const struct proc_ops cifs_mount_params_proc_ops = {
1158         .proc_open      = cifs_mount_params_proc_open,
1159         .proc_read      = seq_read,
1160         .proc_lseek     = seq_lseek,
1161         .proc_release   = single_release,
1162         /* No need for write for now */
1163         /* .proc_write  = cifs_mount_params_proc_write, */
1164 };
1165
1166 #else
1167 inline void cifs_proc_init(void)
1168 {
1169 }
1170
1171 inline void cifs_proc_clean(void)
1172 {
1173 }
1174 #endif /* PROC_FS */