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