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