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 ([email protected])
   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 Wct: %d\n",
  44                  smb->Command, smb->Status.CifsError, smb->Flags,
  45                  smb->Flags2, smb->Mid, smb->Pid, smb->WordCount);
  46         if (!server->ops->check_message(buf, server->total_read, server)) {
  47                 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  48                          server->ops->calc_smb_size(smb));
  49         }
  50 #endif /* CONFIG_CIFS_DEBUG2 */
  51 }
  52
  53 void cifs_dump_mids(struct TCP_Server_Info *server)
  54 {
  55 #ifdef CONFIG_CIFS_DEBUG2
  56         struct mid_q_entry *mid_entry;
  57
  58         if (server == NULL)
  59                 return;
  60
  61         cifs_dbg(VFS, "Dump pending requests:\n");
  62         spin_lock(&server->mid_lock);
  63         list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
  64                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  65                          mid_entry->mid_state,
  66                          le16_to_cpu(mid_entry->command),
  67                          mid_entry->pid,
  68                          mid_entry->callback_data,
  69                          mid_entry->mid);
  70 #ifdef CONFIG_CIFS_STATS2
  71                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  72                          mid_entry->large_buf,
  73                          mid_entry->resp_buf,
  74                          mid_entry->when_received,
  75                          jiffies);
  76 #endif /* STATS2 */
  77                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  78                          mid_entry->multiRsp, mid_entry->multiEnd);
  79                 if (mid_entry->resp_buf) {
  80                         cifs_dump_detail(mid_entry->resp_buf, server);
  81                         cifs_dump_mem("existing buf: ",
  82                                 mid_entry->resp_buf, 62);
  83                 }
  84         }
  85         spin_unlock(&server->mid_lock);
  86 #endif /* CONFIG_CIFS_DEBUG2 */
  87 }
  88
  89 #ifdef CONFIG_PROC_FS
  90 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  91 {
  92         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  93
  94         seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
  95         if (tcon->nativeFileSystem)
  96                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  97         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  98                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  99                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 100                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 101                    tcon->status);
 102         if (dev_type == FILE_DEVICE_DISK)
 103                 seq_puts(m, " type: DISK ");
 104         else if (dev_type == FILE_DEVICE_CD_ROM)
 105                 seq_puts(m, " type: CDROM ");
 106         else
 107                 seq_printf(m, " type: %d ", dev_type);
 108
 109         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 110
 111         if ((tcon->seal) ||
 112             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 113             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 114                 seq_puts(m, " encrypted");
 115         if (tcon->nocase)
 116                 seq_printf(m, " nocase");
 117         if (tcon->unix_ext)
 118                 seq_printf(m, " POSIX Extensions");
 119         if (tcon->ses->server->ops->dump_share_caps)
 120                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 121         if (tcon->use_witness)
 122                 seq_puts(m, " Witness");
 123         if (tcon->broken_sparse_sup)
 124                 seq_puts(m, " nosparse");
 125         if (tcon->need_reconnect)
 126                 seq_puts(m, "\tDISCONNECTED ");
 127         spin_lock(&tcon->tc_lock);
 128         if (tcon->origin_fullpath) {
 129                 seq_printf(m, "\n\tDFS origin fullpath: %s",
 130                            tcon->origin_fullpath);
 131         }
 132         spin_unlock(&tcon->tc_lock);
 133         seq_putc(m, '\n');
 134 }
 135
 136 static void
 137 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 138 {
 139         struct TCP_Server_Info *server = chan->server;
 140
 141         if (!server) {
 142                 seq_printf(m, "\n\n\t\tChannel: %d DISABLED", i+1);
 143                 return;
 144         }
 145
 146         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 147                    "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
 148                    "\n\t\tTCP status: %d Instance: %d"
 149                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 150                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 151                    i+1, server->conn_id,
 152                    server->credits,
 153                    server->echo_credits,
 154                    server->oplock_credits,
 155                    server->dialect,
 156                    server->tcpStatus,
 157                    server->reconnect_instance,
 158                    server->srv_count,
 159                    server->sec_mode,
 160                    in_flight(server),
 161                    atomic_read(&server->in_send),
 162                    atomic_read(&server->num_waiters));
 163 #ifdef CONFIG_NET_NS
 164         if (server->net)
 165                 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
 166 #endif /* NET_NS */
 167
 168 }
 169
 170 static inline const char *smb_speed_to_str(size_t bps)
 171 {
 172         size_t mbps = bps / 1000 / 1000;
 173
 174         switch (mbps) {
 175         case SPEED_10:
 176                 return "10Mbps";
 177         case SPEED_100:
 178                 return "100Mbps";
 179         case SPEED_1000:
 180                 return "1Gbps";
 181         case SPEED_2500:
 182                 return "2.5Gbps";
 183         case SPEED_5000:
 184                 return "5Gbps";
 185         case SPEED_10000:
 186                 return "10Gbps";
 187         case SPEED_14000:
 188                 return "14Gbps";
 189         case SPEED_20000:
 190                 return "20Gbps";
 191         case SPEED_25000:
 192                 return "25Gbps";
 193         case SPEED_40000:
 194                 return "40Gbps";
 195         case SPEED_50000:
 196                 return "50Gbps";
 197         case SPEED_56000:
 198                 return "56Gbps";
 199         case SPEED_100000:
 200                 return "100Gbps";
 201         case SPEED_200000:
 202                 return "200Gbps";
 203         case SPEED_400000:
 204                 return "400Gbps";
 205         case SPEED_800000:
 206                 return "800Gbps";
 207         default:
 208                 return "Unknown";
 209         }
 210 }
 211
 212 static void
 213 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 214 {
 215         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 216         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 217
 218         seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
 219         seq_puts(m, "\t\tCapabilities: ");
 220         if (iface->rdma_capable)
 221                 seq_puts(m, "rdma ");
 222         if (iface->rss_capable)
 223                 seq_puts(m, "rss ");
 224         if (!iface->rdma_capable && !iface->rss_capable)
 225                 seq_puts(m, "None");
 226         seq_putc(m, '\n');
 227         if (iface->sockaddr.ss_family == AF_INET)
 228                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 229         else if (iface->sockaddr.ss_family == AF_INET6)
 230                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 231         if (!iface->is_active)
 232                 seq_puts(m, "\t\t[for-cleanup]\n");
 233 }
 234
 235 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 236 {
 237         struct TCP_Server_Info *server;
 238         struct cifs_ses *ses;
 239         struct cifs_tcon *tcon;
 240         struct cifsFileInfo *cfile;
 241
 242         seq_puts(m, "# Version:1\n");
 243         seq_puts(m, "# Format:\n");
 244         seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
 245 #ifdef CONFIG_CIFS_DEBUG2
 246         seq_printf(m, " <filename> <mid>\n");
 247 #else
 248         seq_printf(m, " <filename>\n");
 249 #endif /* CIFS_DEBUG2 */
 250         spin_lock(&cifs_tcp_ses_lock);
 251         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 252                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 253                         if (cifs_ses_exiting(ses))
 254                                 continue;
 255                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 256                                 spin_lock(&tcon->open_file_lock);
 257                                 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
 258                                         seq_printf(m,
 259                                                 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
 260                                                 tcon->tid,
 261                                                 ses->Suid,
 262                                                 cfile->fid.persistent_fid,
 263                                                 cfile->f_flags,
 264                                                 cfile->count,
 265                                                 cfile->pid,
 266                                                 from_kuid(&init_user_ns, cfile->uid),
 267                                                 cfile->dentry);
 268 #ifdef CONFIG_CIFS_DEBUG2
 269                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 270 #else
 271                                         seq_printf(m, "\n");
 272 #endif /* CIFS_DEBUG2 */
 273                                 }
 274                                 spin_unlock(&tcon->open_file_lock);
 275                         }
 276                 }
 277         }
 278         spin_unlock(&cifs_tcp_ses_lock);
 279         seq_putc(m, '\n');
 280         return 0;
 281 }
 282
 283 static __always_inline const char *compression_alg_str(__le16 alg)
 284 {
 285         switch (alg) {
 286         case SMB3_COMPRESS_NONE:
 287                 return "NONE";
 288         case SMB3_COMPRESS_LZNT1:
 289                 return "LZNT1";
 290         case SMB3_COMPRESS_LZ77:
 291                 return "LZ77";
 292         case SMB3_COMPRESS_LZ77_HUFF:
 293                 return "LZ77-Huffman";
 294         case SMB3_COMPRESS_PATTERN:
 295                 return "Pattern_V1";
 296         default:
 297                 return "invalid";
 298         }
 299 }
 300
 301 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 302 {
 303         struct mid_q_entry *mid_entry;
 304         struct TCP_Server_Info *server;
 305         struct TCP_Server_Info *chan_server;
 306         struct cifs_ses *ses;
 307         struct cifs_tcon *tcon;
 308         struct cifs_server_iface *iface;
 309         size_t iface_weight = 0, iface_min_speed = 0;
 310         struct cifs_server_iface *last_iface = NULL;
 311         int c, i, j;
 312
 313         seq_puts(m,
 314                     "Display Internal CIFS Data Structures for Debugging\n"
 315                     "---------------------------------------------------\n");
 316         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 317         seq_printf(m, "Features:");
 318 #ifdef CONFIG_CIFS_DFS_UPCALL
 319         seq_printf(m, " DFS");
 320 #endif
 321 #ifdef CONFIG_CIFS_FSCACHE
 322         seq_printf(m, ",FSCACHE");
 323 #endif
 324 #ifdef CONFIG_CIFS_SMB_DIRECT
 325         seq_printf(m, ",SMB_DIRECT");
 326 #endif
 327 #ifdef CONFIG_CIFS_STATS2
 328         seq_printf(m, ",STATS2");
 329 #else
 330         seq_printf(m, ",STATS");
 331 #endif
 332 #ifdef CONFIG_CIFS_DEBUG2
 333         seq_printf(m, ",DEBUG2");
 334 #elif defined(CONFIG_CIFS_DEBUG)
 335         seq_printf(m, ",DEBUG");
 336 #endif
 337 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 338         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 339 #endif
 340 #ifdef CONFIG_CIFS_POSIX
 341         seq_printf(m, ",CIFS_POSIX");
 342 #endif
 343 #ifdef CONFIG_CIFS_UPCALL
 344         seq_printf(m, ",UPCALL(SPNEGO)");
 345 #endif
 346 #ifdef CONFIG_CIFS_XATTR
 347         seq_printf(m, ",XATTR");
 348 #endif
 349         seq_printf(m, ",ACL");
 350 #ifdef CONFIG_CIFS_SWN_UPCALL
 351         seq_puts(m, ",WITNESS");
 352 #endif
 353 #ifdef CONFIG_CIFS_COMPRESSION
 354         seq_puts(m, ",COMPRESSION");
 355 #endif
 356         seq_putc(m, '\n');
 357         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 358         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 359
 360         seq_printf(m, "\nServers: ");
 361
 362         c = 0;
 363         spin_lock(&cifs_tcp_ses_lock);
 364         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 365                 /* channel info will be printed as a part of sessions below */
 366                 if (SERVER_IS_CHAN(server))
 367                         continue;
 368
 369                 c++;
 370                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 371                         c, server->conn_id);
 372
 373                 spin_lock(&server->srv_lock);
 374                 if (server->hostname)
 375                         seq_printf(m, "Hostname: %s ", server->hostname);
 376                 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
 377                 spin_unlock(&server->srv_lock);
 378 #ifdef CONFIG_CIFS_SMB_DIRECT
 379                 if (!server->rdma)
 380                         goto skip_rdma;
 381
 382                 if (!server->smbd_conn) {
 383                         seq_printf(m, "\nSMBDirect transport not available");
 384                         goto skip_rdma;
 385                 }
 386
 387                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 388                         "transport status: %x",
 389                         server->smbd_conn->protocol,
 390                         server->smbd_conn->transport_status);
 391                 seq_printf(m, "\nConn receive_credit_max: %x "
 392                         "send_credit_target: %x max_send_size: %x",
 393                         server->smbd_conn->receive_credit_max,
 394                         server->smbd_conn->send_credit_target,
 395                         server->smbd_conn->max_send_size);
 396                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 397                         "max_fragmented_send_size: %x max_receive_size:%x",
 398                         server->smbd_conn->max_fragmented_recv_size,
 399                         server->smbd_conn->max_fragmented_send_size,
 400                         server->smbd_conn->max_receive_size);
 401                 seq_printf(m, "\nConn keep_alive_interval: %x "
 402                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 403                         server->smbd_conn->keep_alive_interval,
 404                         server->smbd_conn->max_readwrite_size,
 405                         server->smbd_conn->rdma_readwrite_threshold);
 406                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 407                         "count_put_receive_buffer: %x count_send_empty: %x",
 408                         server->smbd_conn->count_get_receive_buffer,
 409                         server->smbd_conn->count_put_receive_buffer,
 410                         server->smbd_conn->count_send_empty);
 411                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 412                         "count_enqueue_reassembly_queue: %x "
 413                         "count_dequeue_reassembly_queue: %x "
 414                         "fragment_reassembly_remaining: %x "
 415                         "reassembly_data_length: %x "
 416                         "reassembly_queue_length: %x",
 417                         server->smbd_conn->count_reassembly_queue,
 418                         server->smbd_conn->count_enqueue_reassembly_queue,
 419                         server->smbd_conn->count_dequeue_reassembly_queue,
 420                         server->smbd_conn->fragment_reassembly_remaining,
 421                         server->smbd_conn->reassembly_data_length,
 422                         server->smbd_conn->reassembly_queue_length);
 423                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 424                         "receive_credits: %x receive_credit_target: %x",
 425                         atomic_read(&server->smbd_conn->send_credits),
 426                         atomic_read(&server->smbd_conn->receive_credits),
 427                         server->smbd_conn->receive_credit_target);
 428                 seq_printf(m, "\nPending send_pending: %x ",
 429                         atomic_read(&server->smbd_conn->send_pending));
 430                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 431                         "count_empty_packet_queue: %x",
 432                         server->smbd_conn->count_receive_queue,
 433                         server->smbd_conn->count_empty_packet_queue);
 434                 seq_printf(m, "\nMR responder_resources: %x "
 435                         "max_frmr_depth: %x mr_type: %x",
 436                         server->smbd_conn->responder_resources,
 437                         server->smbd_conn->max_frmr_depth,
 438                         server->smbd_conn->mr_type);
 439                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 440                         atomic_read(&server->smbd_conn->mr_ready_count),
 441                         atomic_read(&server->smbd_conn->mr_used_count));
 442 skip_rdma:
 443 #endif
 444                 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
 445                         server->credits,
 446                         server->echo_credits,
 447                         server->oplock_credits,
 448                         server->dialect);
 449                 if (server->sign)
 450                         seq_printf(m, " signed");
 451                 if (server->posix_ext_supported)
 452                         seq_printf(m, " posix");
 453                 if (server->nosharesock)
 454                         seq_printf(m, " nosharesock");
 455
 456                 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities);
 457
 458                 if (server->rdma)
 459                         seq_printf(m, "\nRDMA ");
 460                 seq_printf(m, "\nTCP status: %d Instance: %d"
 461                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 462                                 server->tcpStatus,
 463                                 server->reconnect_instance,
 464                                 server->srv_count,
 465                                 server->sec_mode, in_flight(server));
 466 #ifdef CONFIG_NET_NS
 467                 if (server->net)
 468                         seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
 469 #endif /* NET_NS */
 470
 471                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 472                                 atomic_read(&server->in_send),
 473                                 atomic_read(&server->num_waiters));
 474
 475                 if (server->leaf_fullpath) {
 476                         seq_printf(m, "\nDFS leaf full path: %s",
 477                                    server->leaf_fullpath);
 478                 }
 479
 480                 seq_puts(m, "\nCompression: ");
 481                 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION))
 482                         seq_puts(m, "no built-in support");
 483                 else if (!server->compression.requested)
 484                         seq_puts(m, "disabled on mount");
 485                 else if (server->compression.enabled)
 486                         seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg));
 487                 else
 488                         seq_puts(m, "disabled (not supported by this server)");
 489
 490                 seq_printf(m, "\n\n\tSessions: ");
 491                 i = 0;
 492                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 493                         spin_lock(&ses->ses_lock);
 494                         if (ses->ses_status == SES_EXITING) {
 495                                 spin_unlock(&ses->ses_lock);
 496                                 continue;
 497                         }
 498                         i++;
 499                         if ((ses->serverDomain == NULL) ||
 500                                 (ses->serverOS == NULL) ||
 501                                 (ses->serverNOS == NULL)) {
 502                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 503                                         i, ses->ip_addr, ses->ses_count,
 504                                         ses->capabilities, ses->ses_status);
 505                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 506                                         seq_printf(m, "Guest ");
 507                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 508                                         seq_printf(m, "Anonymous ");
 509                         } else {
 510                                 seq_printf(m,
 511                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 512                                     "\n\tNOS: %s\tCapability: 0x%x"
 513                                         "\n\tSMB session status: %d ",
 514                                 i, ses->ip_addr, ses->serverDomain,
 515                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 516                                 ses->capabilities, ses->ses_status);
 517                         }
 518                         if (ses->expired_pwd)
 519                                 seq_puts(m, "password no longer valid ");
 520                         spin_unlock(&ses->ses_lock);
 521
 522                         seq_printf(m, "\n\tSecurity type: %s ",
 523                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 524
 525                         /* dump session id helpful for use with network trace */
 526                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 527                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
 528                                 seq_puts(m, " encrypted");
 529                                 /* can help in debugging to show encryption type */
 530                                 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
 531                                         seq_puts(m, "(gcm256)");
 532                         }
 533                         if (ses->sign)
 534                                 seq_puts(m, " signed");
 535
 536                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 537                                    from_kuid(&init_user_ns, ses->linux_uid),
 538                                    from_kuid(&init_user_ns, ses->cred_uid));
 539
 540                         if (ses->dfs_root_ses) {
 541                                 seq_printf(m, "\n\tDFS root session id: 0x%llx",
 542                                            ses->dfs_root_ses->Suid);
 543                         }
 544
 545                         spin_lock(&ses->chan_lock);
 546                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
 547                                 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
 548                         if (CIFS_CHAN_IN_RECONNECT(ses, 0))
 549                                 seq_puts(m, "\t[RECONNECTING] ");
 550
 551                         if (ses->chan_count > 1) {
 552                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 553                                            ses->chan_count-1);
 554                                 for (j = 1; j < ses->chan_count; j++) {
 555                                         cifs_dump_channel(m, j, &ses->chans[j]);
 556                                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
 557                                                 seq_puts(m, "\tDISCONNECTED ");
 558                                         if (CIFS_CHAN_IN_RECONNECT(ses, j))
 559                                                 seq_puts(m, "\t[RECONNECTING] ");
 560                                 }
 561                         }
 562                         spin_unlock(&ses->chan_lock);
 563
 564                         seq_puts(m, "\n\n\tShares: ");
 565                         j = 0;
 566
 567                         seq_printf(m, "\n\t%d) IPC: ", j);
 568                         if (ses->tcon_ipc)
 569                                 cifs_debug_tcon(m, ses->tcon_ipc);
 570                         else
 571                                 seq_puts(m, "none\n");
 572
 573                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 574                                 ++j;
 575                                 seq_printf(m, "\n\t%d) ", j);
 576                                 cifs_debug_tcon(m, tcon);
 577                         }
 578
 579                         spin_lock(&ses->iface_lock);
 580                         if (ses->iface_count)
 581                                 seq_printf(m, "\n\n\tServer interfaces: %zu"
 582                                            "\tLast updated: %lu seconds ago",
 583                                            ses->iface_count,
 584                                            (jiffies - ses->iface_last_update) / HZ);
 585
 586                         last_iface = list_last_entry(&ses->iface_list,
 587                                                      struct cifs_server_iface,
 588                                                      iface_head);
 589                         iface_min_speed = last_iface->speed;
 590
 591                         j = 0;
 592                         list_for_each_entry(iface, &ses->iface_list,
 593                                                  iface_head) {
 594                                 seq_printf(m, "\n\t%d)", ++j);
 595                                 cifs_dump_iface(m, iface);
 596
 597                                 iface_weight = iface->speed / iface_min_speed;
 598                                 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
 599                                            "\n\t\tAllocated channels: %u\n",
 600                                            iface->weight_fulfilled,
 601                                            iface_weight,
 602                                            iface->num_channels);
 603
 604                                 if (is_ses_using_iface(ses, iface))
 605                                         seq_puts(m, "\t\t[CONNECTED]\n");
 606                         }
 607                         spin_unlock(&ses->iface_lock);
 608
 609                         seq_puts(m, "\n\n\tMIDs: ");
 610                         spin_lock(&ses->chan_lock);
 611                         for (j = 0; j < ses->chan_count; j++) {
 612                                 chan_server = ses->chans[j].server;
 613                                 if (!chan_server)
 614                                         continue;
 615
 616                                 if (list_empty(&chan_server->pending_mid_q))
 617                                         continue;
 618
 619                                 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
 620                                            chan_server->conn_id);
 621                                 spin_lock(&chan_server->mid_lock);
 622                                 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
 623                                         seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
 624                                                    mid_entry->mid_state,
 625                                                    le16_to_cpu(mid_entry->command),
 626                                                    mid_entry->pid,
 627                                                    mid_entry->callback_data,
 628                                                    mid_entry->mid);
 629                                 }
 630                                 spin_unlock(&chan_server->mid_lock);
 631                         }
 632                         spin_unlock(&ses->chan_lock);
 633                         seq_puts(m, "\n--\n");
 634                 }
 635                 if (i == 0)
 636                         seq_printf(m, "\n\t\t[NONE]");
 637         }
 638         if (c == 0)
 639                 seq_printf(m, "\n\t[NONE]");
 640
 641         spin_unlock(&cifs_tcp_ses_lock);
 642         seq_putc(m, '\n');
 643         cifs_swn_dump(m);
 644
 645         /* BB add code to dump additional info such as TCP session info now */
 646         return 0;
 647 }
 648
 649 static ssize_t cifs_stats_proc_write(struct file *file,
 650                 const char __user *buffer, size_t count, loff_t *ppos)
 651 {
 652         bool bv;
 653         int rc;
 654         struct TCP_Server_Info *server;
 655         struct cifs_ses *ses;
 656         struct cifs_tcon *tcon;
 657
 658         rc = kstrtobool_from_user(buffer, count, &bv);
 659         if (rc == 0) {
 660 #ifdef CONFIG_CIFS_STATS2
 661                 int i;
 662
 663                 atomic_set(&total_buf_alloc_count, 0);
 664                 atomic_set(&total_small_buf_alloc_count, 0);
 665 #endif /* CONFIG_CIFS_STATS2 */
 666                 atomic_set(&tcpSesReconnectCount, 0);
 667                 atomic_set(&tconInfoReconnectCount, 0);
 668
 669                 spin_lock(&GlobalMid_Lock);
 670                 GlobalMaxActiveXid = 0;
 671                 GlobalCurrentXid = 0;
 672                 spin_unlock(&GlobalMid_Lock);
 673                 spin_lock(&cifs_tcp_ses_lock);
 674                 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 675                         server->max_in_flight = 0;
 676 #ifdef CONFIG_CIFS_STATS2
 677                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 678                                 atomic_set(&server->num_cmds[i], 0);
 679                                 atomic_set(&server->smb2slowcmd[i], 0);
 680                                 server->time_per_cmd[i] = 0;
 681                                 server->slowest_cmd[i] = 0;
 682                                 server->fastest_cmd[0] = 0;
 683                         }
 684 #endif /* CONFIG_CIFS_STATS2 */
 685                         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 686                                 if (cifs_ses_exiting(ses))
 687                                         continue;
 688                                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 689                                         atomic_set(&tcon->num_smbs_sent, 0);
 690                                         spin_lock(&tcon->stat_lock);
 691                                         tcon->bytes_read = 0;
 692                                         tcon->bytes_written = 0;
 693                                         tcon->stats_from_time = ktime_get_real_seconds();
 694                                         spin_unlock(&tcon->stat_lock);
 695                                         if (server->ops->clear_stats)
 696                                                 server->ops->clear_stats(tcon);
 697                                 }
 698                         }
 699                 }
 700                 spin_unlock(&cifs_tcp_ses_lock);
 701         } else {
 702                 return rc;
 703         }
 704
 705         return count;
 706 }
 707
 708 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 709 {
 710         int i;
 711 #ifdef CONFIG_CIFS_STATS2
 712         int j;
 713 #endif /* STATS2 */
 714         struct TCP_Server_Info *server;
 715         struct cifs_ses *ses;
 716         struct cifs_tcon *tcon;
 717
 718         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 719                         sesInfoAllocCount.counter);
 720         seq_printf(m, "Share (unique mount targets): %d\n",
 721                         tconInfoAllocCount.counter);
 722         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 723                         buf_alloc_count.counter,
 724                         cifs_min_rcv + tcpSesAllocCount.counter);
 725         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 726                         small_buf_alloc_count.counter, cifs_min_small);
 727 #ifdef CONFIG_CIFS_STATS2
 728         seq_printf(m, "Total Large %d Small %d Allocations\n",
 729                                 atomic_read(&total_buf_alloc_count),
 730                                 atomic_read(&total_small_buf_alloc_count));
 731 #endif /* CONFIG_CIFS_STATS2 */
 732
 733         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
 734         seq_printf(m,
 735                 "\n%d session %d share reconnects\n",
 736                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 737
 738         seq_printf(m,
 739                 "Total vfs operations: %d maximum at one time: %d\n",
 740                 GlobalCurrentXid, GlobalMaxActiveXid);
 741
 742         i = 0;
 743         spin_lock(&cifs_tcp_ses_lock);
 744         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 745                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 746 #ifdef CONFIG_CIFS_STATS2
 747                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 748                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 749                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 750                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 751                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 752                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 753                                 atomic_read(&server->num_cmds[j]),
 754                                 server->time_per_cmd[j],
 755                                 server->fastest_cmd[j],
 756                                 server->slowest_cmd[j]);
 757                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 758                         if (atomic_read(&server->smb2slowcmd[j])) {
 759                                 spin_lock(&server->srv_lock);
 760                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 761                                         atomic_read(&server->smb2slowcmd[j]),
 762                                         server->hostname, j);
 763                                 spin_unlock(&server->srv_lock);
 764                         }
 765 #endif /* STATS2 */
 766                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
 767                         if (cifs_ses_exiting(ses))
 768                                 continue;
 769                         list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 770                                 i++;
 771                                 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
 772                                 if (tcon->need_reconnect)
 773                                         seq_puts(m, "\tDISCONNECTED ");
 774                                 seq_printf(m, "\nSMBs: %d since %ptTs UTC",
 775                                            atomic_read(&tcon->num_smbs_sent),
 776                                            &tcon->stats_from_time);
 777                                 if (server->ops->print_stats)
 778                                         server->ops->print_stats(m, tcon);
 779                         }
 780                 }
 781         }
 782         spin_unlock(&cifs_tcp_ses_lock);
 783
 784         seq_putc(m, '\n');
 785         return 0;
 786 }
 787
 788 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 789 {
 790         return single_open(file, cifs_stats_proc_show, NULL);
 791 }
 792
 793 static const struct proc_ops cifs_stats_proc_ops = {
 794         .proc_open      = cifs_stats_proc_open,
 795         .proc_read      = seq_read,
 796         .proc_lseek     = seq_lseek,
 797         .proc_release   = single_release,
 798         .proc_write     = cifs_stats_proc_write,
 799 };
 800
 801 #ifdef CONFIG_CIFS_SMB_DIRECT
 802 #define PROC_FILE_DEFINE(name) \
 803 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 804         size_t count, loff_t *ppos) \
 805 { \
 806         int rc; \
 807         rc = kstrtoint_from_user(buffer, count, 10, &name); \
 808         if (rc) \
 809                 return rc; \
 810         return count; \
 811 } \
 812 static int name##_proc_show(struct seq_file *m, void *v) \
 813 { \
 814         seq_printf(m, "%d\n", name); \
 815         return 0; \
 816 } \
 817 static int name##_open(struct inode *inode, struct file *file) \
 818 { \
 819         return single_open(file, name##_proc_show, NULL); \
 820 } \
 821 \
 822 static const struct proc_ops cifs_##name##_proc_fops = { \
 823         .proc_open      = name##_open, \
 824         .proc_read      = seq_read, \
 825         .proc_lseek     = seq_lseek, \
 826         .proc_release   = single_release, \
 827         .proc_write     = name##_write, \
 828 }
 829
 830 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 831 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 832 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 833 PROC_FILE_DEFINE(smbd_max_receive_size);
 834 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 835 PROC_FILE_DEFINE(smbd_max_send_size);
 836 PROC_FILE_DEFINE(smbd_send_credit_target);
 837 PROC_FILE_DEFINE(smbd_receive_credit_max);
 838 #endif
 839
 840 static struct proc_dir_entry *proc_fs_cifs;
 841 static const struct proc_ops cifsFYI_proc_ops;
 842 static const struct proc_ops cifs_lookup_cache_proc_ops;
 843 static const struct proc_ops traceSMB_proc_ops;
 844 static const struct proc_ops cifs_security_flags_proc_ops;
 845 static const struct proc_ops cifs_linux_ext_proc_ops;
 846 static const struct proc_ops cifs_mount_params_proc_ops;
 847
 848 void
 849 cifs_proc_init(void)
 850 {
 851         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 852         if (proc_fs_cifs == NULL)
 853                 return;
 854
 855         proc_create_single("DebugData", 0, proc_fs_cifs,
 856                         cifs_debug_data_proc_show);
 857
 858         proc_create_single("open_files", 0400, proc_fs_cifs,
 859                         cifs_debug_files_proc_show);
 860
 861         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 862         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 863         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 864         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 865                     &cifs_linux_ext_proc_ops);
 866         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 867                     &cifs_security_flags_proc_ops);
 868         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 869                     &cifs_lookup_cache_proc_ops);
 870
 871         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 872
 873 #ifdef CONFIG_CIFS_DFS_UPCALL
 874         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 875 #endif
 876
 877 #ifdef CONFIG_CIFS_SMB_DIRECT
 878         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 879                 &cifs_rdma_readwrite_threshold_proc_fops);
 880         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 881                 &cifs_smbd_max_frmr_depth_proc_fops);
 882         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 883                 &cifs_smbd_keep_alive_interval_proc_fops);
 884         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 885                 &cifs_smbd_max_receive_size_proc_fops);
 886         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 887                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 888         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 889                 &cifs_smbd_max_send_size_proc_fops);
 890         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 891                 &cifs_smbd_send_credit_target_proc_fops);
 892         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 893                 &cifs_smbd_receive_credit_max_proc_fops);
 894 #endif
 895 }
 896
 897 void
 898 cifs_proc_clean(void)
 899 {
 900         if (proc_fs_cifs == NULL)
 901                 return;
 902
 903         remove_proc_entry("DebugData", proc_fs_cifs);
 904         remove_proc_entry("open_files", proc_fs_cifs);
 905         remove_proc_entry("cifsFYI", proc_fs_cifs);
 906         remove_proc_entry("traceSMB", proc_fs_cifs);
 907         remove_proc_entry("Stats", proc_fs_cifs);
 908         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 909         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 910         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 911         remove_proc_entry("mount_params", proc_fs_cifs);
 912
 913 #ifdef CONFIG_CIFS_DFS_UPCALL
 914         remove_proc_entry("dfscache", proc_fs_cifs);
 915 #endif
 916 #ifdef CONFIG_CIFS_SMB_DIRECT
 917         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 918         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 919         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 920         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 921         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 922         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 923         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 924         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 925 #endif
 926         remove_proc_entry("fs/cifs", NULL);
 927 }
 928
 929 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 930 {
 931         seq_printf(m, "%d\n", cifsFYI);
 932         return 0;
 933 }
 934
 935 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 936 {
 937         return single_open(file, cifsFYI_proc_show, NULL);
 938 }
 939
 940 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 941                 size_t count, loff_t *ppos)
 942 {
 943         char c[2] = { '\0' };
 944         bool bv;
 945         int rc;
 946
 947         rc = get_user(c[0], buffer);
 948         if (rc)
 949                 return rc;
 950         if (kstrtobool(c, &bv) == 0)
 951                 cifsFYI = bv;
 952         else if ((c[0] > '1') && (c[0] <= '9'))
 953                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 954         else
 955                 return -EINVAL;
 956
 957         return count;
 958 }
 959
 960 static const struct proc_ops cifsFYI_proc_ops = {
 961         .proc_open      = cifsFYI_proc_open,
 962         .proc_read      = seq_read,
 963         .proc_lseek     = seq_lseek,
 964         .proc_release   = single_release,
 965         .proc_write     = cifsFYI_proc_write,
 966 };
 967
 968 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 969 {
 970         seq_printf(m, "%d\n", linuxExtEnabled);
 971         return 0;
 972 }
 973
 974 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 975 {
 976         return single_open(file, cifs_linux_ext_proc_show, NULL);
 977 }
 978
 979 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 980                 const char __user *buffer, size_t count, loff_t *ppos)
 981 {
 982         int rc;
 983
 984         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 985         if (rc)
 986                 return rc;
 987
 988         return count;
 989 }
 990
 991 static const struct proc_ops cifs_linux_ext_proc_ops = {
 992         .proc_open      = cifs_linux_ext_proc_open,
 993         .proc_read      = seq_read,
 994         .proc_lseek     = seq_lseek,
 995         .proc_release   = single_release,
 996         .proc_write     = cifs_linux_ext_proc_write,
 997 };
 998
 999 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
1000 {
1001         seq_printf(m, "%d\n", lookupCacheEnabled);
1002         return 0;
1003 }
1004
1005 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
1006 {
1007         return single_open(file, cifs_lookup_cache_proc_show, NULL);
1008 }
1009
1010 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
1011                 const char __user *buffer, size_t count, loff_t *ppos)
1012 {
1013         int rc;
1014
1015         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
1016         if (rc)
1017                 return rc;
1018
1019         return count;
1020 }
1021
1022 static const struct proc_ops cifs_lookup_cache_proc_ops = {
1023         .proc_open      = cifs_lookup_cache_proc_open,
1024         .proc_read      = seq_read,
1025         .proc_lseek     = seq_lseek,
1026         .proc_release   = single_release,
1027         .proc_write     = cifs_lookup_cache_proc_write,
1028 };
1029
1030 static int traceSMB_proc_show(struct seq_file *m, void *v)
1031 {
1032         seq_printf(m, "%d\n", traceSMB);
1033         return 0;
1034 }
1035
1036 static int traceSMB_proc_open(struct inode *inode, struct file *file)
1037 {
1038         return single_open(file, traceSMB_proc_show, NULL);
1039 }
1040
1041 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1042                 size_t count, loff_t *ppos)
1043 {
1044         int rc;
1045
1046         rc = kstrtobool_from_user(buffer, count, &traceSMB);
1047         if (rc)
1048                 return rc;
1049
1050         return count;
1051 }
1052
1053 static const struct proc_ops traceSMB_proc_ops = {
1054         .proc_open      = traceSMB_proc_open,
1055         .proc_read      = seq_read,
1056         .proc_lseek     = seq_lseek,
1057         .proc_release   = single_release,
1058         .proc_write     = traceSMB_proc_write,
1059 };
1060
1061 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1062 {
1063         seq_printf(m, "0x%x\n", global_secflags);
1064         return 0;
1065 }
1066
1067 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1068 {
1069         return single_open(file, cifs_security_flags_proc_show, NULL);
1070 }
1071
1072 /*
1073  * Ensure that if someone sets a MUST flag, that we disable all other MAY
1074  * flags except for the ones corresponding to the given MUST flag. If there are
1075  * multiple MUST flags, then try to prefer more secure ones.
1076  */
1077 static void
1078 cifs_security_flags_handle_must_flags(unsigned int *flags)
1079 {
1080         unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL);
1081
1082         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1083                 *flags = CIFSSEC_MUST_KRB5;
1084         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1085                 *flags = CIFSSEC_MUST_NTLMSSP;
1086         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1087                 *flags = CIFSSEC_MUST_NTLMV2;
1088
1089         *flags |= signflags;
1090 }
1091
1092 static ssize_t cifs_security_flags_proc_write(struct file *file,
1093                 const char __user *buffer, size_t count, loff_t *ppos)
1094 {
1095         int rc;
1096         unsigned int flags;
1097         char flags_string[12];
1098         bool bv;
1099
1100         if ((count < 1) || (count > 11))
1101                 return -EINVAL;
1102
1103         memset(flags_string, 0, 12);
1104
1105         if (copy_from_user(flags_string, buffer, count))
1106                 return -EFAULT;
1107
1108         if (count < 3) {
1109                 /* single char or single char followed by null */
1110                 if (kstrtobool(flags_string, &bv) == 0) {
1111                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1112                         return count;
1113                 } else if (!isdigit(flags_string[0])) {
1114                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1115                                         flags_string);
1116                         return -EINVAL;
1117                 }
1118         }
1119
1120         /* else we have a number */
1121         rc = kstrtouint(flags_string, 0, &flags);
1122         if (rc) {
1123                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1124                                 flags_string);
1125                 return rc;
1126         }
1127
1128         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1129
1130         if (flags == 0)  {
1131                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1132                 return -EINVAL;
1133         }
1134
1135         if (flags & ~CIFSSEC_MASK) {
1136                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1137                          flags & ~CIFSSEC_MASK);
1138                 return -EINVAL;
1139         }
1140
1141         cifs_security_flags_handle_must_flags(&flags);
1142
1143         /* flags look ok - update the global security flags for cifs module */
1144         global_secflags = flags;
1145         if (global_secflags & CIFSSEC_MUST_SIGN) {
1146                 /* requiring signing implies signing is allowed */
1147                 global_secflags |= CIFSSEC_MAY_SIGN;
1148                 cifs_dbg(FYI, "packet signing now required\n");
1149         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1150                 cifs_dbg(FYI, "packet signing disabled\n");
1151         }
1152         /* BB should we turn on MAY flags for other MUST options? */
1153         return count;
1154 }
1155
1156 static const struct proc_ops cifs_security_flags_proc_ops = {
1157         .proc_open      = cifs_security_flags_proc_open,
1158         .proc_read      = seq_read,
1159         .proc_lseek     = seq_lseek,
1160         .proc_release   = single_release,
1161         .proc_write     = cifs_security_flags_proc_write,
1162 };
1163
1164 /* To make it easier to debug, can help to show mount params */
1165 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1166 {
1167         const struct fs_parameter_spec *p;
1168         const char *type;
1169
1170         for (p = smb3_fs_parameters; p->name; p++) {
1171                 /* cannot use switch with pointers... */
1172                 if (!p->type) {
1173                         if (p->flags == fs_param_neg_with_no)
1174                                 type = "noflag";
1175                         else
1176                                 type = "flag";
1177                 } else if (p->type == fs_param_is_bool)
1178                         type = "bool";
1179                 else if (p->type == fs_param_is_u32)
1180                         type = "u32";
1181                 else if (p->type == fs_param_is_u64)
1182                         type = "u64";
1183                 else if (p->type == fs_param_is_string)
1184                         type = "string";
1185                 else
1186                         type = "unknown";
1187
1188                 seq_printf(m, "%s:%s\n", p->name, type);
1189         }
1190
1191         return 0;
1192 }
1193
1194 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1195 {
1196         return single_open(file, cifs_mount_params_proc_show, NULL);
1197 }
1198
1199 static const struct proc_ops cifs_mount_params_proc_ops = {
1200         .proc_open      = cifs_mount_params_proc_open,
1201         .proc_read      = seq_read,
1202         .proc_lseek     = seq_lseek,
1203         .proc_release   = single_release,
1204         /* No need for write for now */
1205         /* .proc_write  = cifs_mount_params_proc_write, */
1206 };
1207
1208 #else
1209 inline void cifs_proc_init(void)
1210 {
1211 }
1212
1213 inline void cifs_proc_clean(void)
1214 {
1215 }
1216 #endif /* PROC_FS */