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