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