fs/cifs/cifs_debug.c

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