fs/smb/client/cifs_debug.c

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