fs/cifs/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   fs/cifs_debug.c
   4  *
   5  *   Copyright (C) International Business Machines  Corp., 2000,2005
   6  *
   7  *   Modified by Steve French (sfrench@us.ibm.com)
   8  */
   9 #include <linux/fs.h>
  10 #include <linux/string.h>
  11 #include <linux/ctype.h>
  12 #include <linux/module.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/uaccess.h>
  15 #include "cifspdu.h"
  16 #include "cifsglob.h"
  17 #include "cifsproto.h"
  18 #include "cifs_debug.h"
  19 #include "cifsfs.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
  27 void
  28 cifs_dump_mem(char *label, void *data, int length)
  29 {
  30         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  31         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  32                        data, length, true);
  33 }
  34
  35 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  36 {
  37 #ifdef CONFIG_CIFS_DEBUG2
  38         struct smb_hdr *smb = (struct smb_hdr *)buf;
  39
  40         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  41                  smb->Command, smb->Status.CifsError,
  42                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  43         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  44                  server->ops->calc_smb_size(smb, server));
  45 #endif /* CONFIG_CIFS_DEBUG2 */
  46 }
  47
  48 void cifs_dump_mids(struct TCP_Server_Info *server)
  49 {
  50 #ifdef CONFIG_CIFS_DEBUG2
  51         struct list_head *tmp;
  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(&GlobalMid_Lock);
  59         list_for_each(tmp, &server->pending_mid_q) {
  60                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  61                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  62                          mid_entry->mid_state,
  63                          le16_to_cpu(mid_entry->command),
  64                          mid_entry->pid,
  65                          mid_entry->callback_data,
  66                          mid_entry->mid);
  67 #ifdef CONFIG_CIFS_STATS2
  68                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  69                          mid_entry->large_buf,
  70                          mid_entry->resp_buf,
  71                          mid_entry->when_received,
  72                          jiffies);
  73 #endif /* STATS2 */
  74                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  75                          mid_entry->multiRsp, mid_entry->multiEnd);
  76                 if (mid_entry->resp_buf) {
  77                         cifs_dump_detail(mid_entry->resp_buf, server);
  78                         cifs_dump_mem("existing buf: ",
  79                                 mid_entry->resp_buf, 62);
  80                 }
  81         }
  82         spin_unlock(&GlobalMid_Lock);
  83 #endif /* CONFIG_CIFS_DEBUG2 */
  84 }
  85
  86 #ifdef CONFIG_PROC_FS
  87 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  88 {
  89         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  90
  91         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
  92         if (tcon->nativeFileSystem)
  93                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  94         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  95                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  96                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
  97                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  98                    tcon->tidStatus);
  99         if (dev_type == FILE_DEVICE_DISK)
 100                 seq_puts(m, " type: DISK ");
 101         else if (dev_type == FILE_DEVICE_CD_ROM)
 102                 seq_puts(m, " type: CDROM ");
 103         else
 104                 seq_printf(m, " type: %d ", dev_type);
 105
 106         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 107
 108         if ((tcon->seal) ||
 109             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 110             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 111                 seq_printf(m, " Encrypted");
 112         if (tcon->nocase)
 113                 seq_printf(m, " nocase");
 114         if (tcon->unix_ext)
 115                 seq_printf(m, " POSIX Extensions");
 116         if (tcon->ses->server->ops->dump_share_caps)
 117                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 118
 119         if (tcon->need_reconnect)
 120                 seq_puts(m, "\tDISCONNECTED ");
 121         seq_putc(m, '\n');
 122 }
 123
 124 static void
 125 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 126 {
 127         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 128         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 129
 130         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 131         seq_puts(m, "\t\tCapabilities: ");
 132         if (iface->rdma_capable)
 133                 seq_puts(m, "rdma ");
 134         if (iface->rss_capable)
 135                 seq_puts(m, "rss ");
 136         seq_putc(m, '\n');
 137         if (iface->sockaddr.ss_family == AF_INET)
 138                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 139         else if (iface->sockaddr.ss_family == AF_INET6)
 140                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 141 }
 142
 143 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 144 {
 145         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 146         struct TCP_Server_Info *server;
 147         struct cifs_ses *ses;
 148         struct cifs_tcon *tcon;
 149         struct cifsFileInfo *cfile;
 150
 151         seq_puts(m, "# Version:1\n");
 152         seq_puts(m, "# Format:\n");
 153         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 154 #ifdef CONFIG_CIFS_DEBUG2
 155         seq_printf(m, " <filename> <mid>\n");
 156 #else
 157         seq_printf(m, " <filename>\n");
 158 #endif /* CIFS_DEBUG2 */
 159         spin_lock(&cifs_tcp_ses_lock);
 160         list_for_each(stmp, &cifs_tcp_ses_list) {
 161                 server = list_entry(stmp, struct TCP_Server_Info,
 162                                     tcp_ses_list);
 163                 list_for_each(tmp, &server->smb_ses_list) {
 164                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 165                         list_for_each(tmp1, &ses->tcon_list) {
 166                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 167                                 spin_lock(&tcon->open_file_lock);
 168                                 list_for_each(tmp2, &tcon->openFileList) {
 169                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 170                                                      tlist);
 171                                         seq_printf(m,
 172                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 173                                                 tcon->tid,
 174                                                 cfile->fid.persistent_fid,
 175                                                 cfile->f_flags,
 176                                                 cfile->count,
 177                                                 cfile->pid,
 178                                                 from_kuid(&init_user_ns, cfile->uid),
 179                                                 cfile->dentry->d_name.name);
 180 #ifdef CONFIG_CIFS_DEBUG2
 181                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 182 #else
 183                                         seq_printf(m, "\n");
 184 #endif /* CIFS_DEBUG2 */
 185                                 }
 186                                 spin_unlock(&tcon->open_file_lock);
 187                         }
 188                 }
 189         }
 190         spin_unlock(&cifs_tcp_ses_lock);
 191         seq_putc(m, '\n');
 192         return 0;
 193 }
 194
 195 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 196 {
 197         struct list_head *tmp1, *tmp2, *tmp3;
 198         struct mid_q_entry *mid_entry;
 199         struct TCP_Server_Info *server;
 200         struct cifs_ses *ses;
 201         struct cifs_tcon *tcon;
 202         int i, j;
 203
 204         seq_puts(m,
 205                     "Display Internal CIFS Data Structures for Debugging\n"
 206                     "---------------------------------------------------\n");
 207         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 208         seq_printf(m, "Features:");
 209 #ifdef CONFIG_CIFS_DFS_UPCALL
 210         seq_printf(m, " DFS");
 211 #endif
 212 #ifdef CONFIG_CIFS_FSCACHE
 213         seq_printf(m, ",FSCACHE");
 214 #endif
 215 #ifdef CONFIG_CIFS_SMB_DIRECT
 216         seq_printf(m, ",SMB_DIRECT");
 217 #endif
 218 #ifdef CONFIG_CIFS_STATS2
 219         seq_printf(m, ",STATS2");
 220 #else
 221         seq_printf(m, ",STATS");
 222 #endif
 223 #ifdef CONFIG_CIFS_DEBUG2
 224         seq_printf(m, ",DEBUG2");
 225 #elif defined(CONFIG_CIFS_DEBUG)
 226         seq_printf(m, ",DEBUG");
 227 #endif
 228 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 229         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 230 #endif
 231 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 232         seq_printf(m, ",WEAK_PW_HASH");
 233 #endif
 234 #ifdef CONFIG_CIFS_POSIX
 235         seq_printf(m, ",CIFS_POSIX");
 236 #endif
 237 #ifdef CONFIG_CIFS_UPCALL
 238         seq_printf(m, ",UPCALL(SPNEGO)");
 239 #endif
 240 #ifdef CONFIG_CIFS_XATTR
 241         seq_printf(m, ",XATTR");
 242 #endif
 243         seq_printf(m, ",ACL");
 244         seq_putc(m, '\n');
 245         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 246         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 247         seq_printf(m, "Servers:");
 248
 249         i = 0;
 250         spin_lock(&cifs_tcp_ses_lock);
 251         list_for_each(tmp1, &cifs_tcp_ses_list) {
 252                 server = list_entry(tmp1, struct TCP_Server_Info,
 253                                     tcp_ses_list);
 254
 255 #ifdef CONFIG_CIFS_SMB_DIRECT
 256                 if (!server->rdma)
 257                         goto skip_rdma;
 258
 259                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 260                         "transport status: %x",
 261                         server->smbd_conn->protocol,
 262                         server->smbd_conn->transport_status);
 263                 seq_printf(m, "\nConn receive_credit_max: %x "
 264                         "send_credit_target: %x max_send_size: %x",
 265                         server->smbd_conn->receive_credit_max,
 266                         server->smbd_conn->send_credit_target,
 267                         server->smbd_conn->max_send_size);
 268                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 269                         "max_fragmented_send_size: %x max_receive_size:%x",
 270                         server->smbd_conn->max_fragmented_recv_size,
 271                         server->smbd_conn->max_fragmented_send_size,
 272                         server->smbd_conn->max_receive_size);
 273                 seq_printf(m, "\nConn keep_alive_interval: %x "
 274                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 275                         server->smbd_conn->keep_alive_interval,
 276                         server->smbd_conn->max_readwrite_size,
 277                         server->smbd_conn->rdma_readwrite_threshold);
 278                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 279                         "count_put_receive_buffer: %x count_send_empty: %x",
 280                         server->smbd_conn->count_get_receive_buffer,
 281                         server->smbd_conn->count_put_receive_buffer,
 282                         server->smbd_conn->count_send_empty);
 283                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 284                         "count_enqueue_reassembly_queue: %x "
 285                         "count_dequeue_reassembly_queue: %x "
 286                         "fragment_reassembly_remaining: %x "
 287                         "reassembly_data_length: %x "
 288                         "reassembly_queue_length: %x",
 289                         server->smbd_conn->count_reassembly_queue,
 290                         server->smbd_conn->count_enqueue_reassembly_queue,
 291                         server->smbd_conn->count_dequeue_reassembly_queue,
 292                         server->smbd_conn->fragment_reassembly_remaining,
 293                         server->smbd_conn->reassembly_data_length,
 294                         server->smbd_conn->reassembly_queue_length);
 295                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 296                         "receive_credits: %x receive_credit_target: %x",
 297                         atomic_read(&server->smbd_conn->send_credits),
 298                         atomic_read(&server->smbd_conn->receive_credits),
 299                         server->smbd_conn->receive_credit_target);
 300                 seq_printf(m, "\nPending send_pending: %x "
 301                         "send_payload_pending: %x",
 302                         atomic_read(&server->smbd_conn->send_pending),
 303                         atomic_read(&server->smbd_conn->send_payload_pending));
 304                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 305                         "count_empty_packet_queue: %x",
 306                         server->smbd_conn->count_receive_queue,
 307                         server->smbd_conn->count_empty_packet_queue);
 308                 seq_printf(m, "\nMR responder_resources: %x "
 309                         "max_frmr_depth: %x mr_type: %x",
 310                         server->smbd_conn->responder_resources,
 311                         server->smbd_conn->max_frmr_depth,
 312                         server->smbd_conn->mr_type);
 313                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 314                         atomic_read(&server->smbd_conn->mr_ready_count),
 315                         atomic_read(&server->smbd_conn->mr_used_count));
 316 skip_rdma:
 317 #endif
 318                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 319                         server->credits,  server->dialect);
 320                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 321                         seq_printf(m, " COMPRESS_LZNT1");
 322                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 323                         seq_printf(m, " COMPRESS_LZ77");
 324                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 325                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 326                 if (server->sign)
 327                         seq_printf(m, " signed");
 328                 if (server->posix_ext_supported)
 329                         seq_printf(m, " posix");
 330
 331                 i++;
 332                 list_for_each(tmp2, &server->smb_ses_list) {
 333                         ses = list_entry(tmp2, struct cifs_ses,
 334                                          smb_ses_list);
 335                         if ((ses->serverDomain == NULL) ||
 336                                 (ses->serverOS == NULL) ||
 337                                 (ses->serverNOS == NULL)) {
 338                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 339                                         i, ses->serverName, ses->ses_count,
 340                                         ses->capabilities, ses->status);
 341                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 342                                         seq_printf(m, "Guest\t");
 343                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 344                                         seq_printf(m, "Anonymous\t");
 345                         } else {
 346                                 seq_printf(m,
 347                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 348                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 349                                     " session status: %d ",
 350                                 i, ses->serverName, ses->serverDomain,
 351                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 352                                 ses->capabilities, ses->status);
 353                         }
 354                         if (server->rdma)
 355                                 seq_printf(m, "RDMA\n\t");
 356                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 357                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 358                                    server->tcpStatus,
 359                                    server->reconnect_instance,
 360                                    server->srv_count,
 361                                    server->sec_mode, in_flight(server));
 362
 363 #ifdef CONFIG_CIFS_STATS2
 364                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 365                                 atomic_read(&server->in_send),
 366                                 atomic_read(&server->num_waiters));
 367 #endif
 368                         /* dump session id helpful for use with network trace */
 369                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 370                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 371                                 seq_puts(m, " encrypted");
 372                         if (ses->sign)
 373                                 seq_puts(m, " signed");
 374
 375                         seq_puts(m, "\n\tShares:");
 376                         j = 0;
 377
 378                         seq_printf(m, "\n\t%d) IPC: ", j);
 379                         if (ses->tcon_ipc)
 380                                 cifs_debug_tcon(m, ses->tcon_ipc);
 381                         else
 382                                 seq_puts(m, "none\n");
 383
 384                         list_for_each(tmp3, &ses->tcon_list) {
 385                                 tcon = list_entry(tmp3, struct cifs_tcon,
 386                                                   tcon_list);
 387                                 ++j;
 388                                 seq_printf(m, "\n\t%d) ", j);
 389                                 cifs_debug_tcon(m, tcon);
 390                         }
 391
 392                         seq_puts(m, "\n\tMIDs:\n");
 393
 394                         spin_lock(&GlobalMid_Lock);
 395                         list_for_each(tmp3, &server->pending_mid_q) {
 396                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 397                                         qhead);
 398                                 seq_printf(m, "\tState: %d com: %d pid:"
 399                                               " %d cbdata: %p mid %llu\n",
 400                                               mid_entry->mid_state,
 401                                               le16_to_cpu(mid_entry->command),
 402                                               mid_entry->pid,
 403                                               mid_entry->callback_data,
 404                                               mid_entry->mid);
 405                         }
 406                         spin_unlock(&GlobalMid_Lock);
 407
 408                         spin_lock(&ses->iface_lock);
 409                         if (ses->iface_count)
 410                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 411                                            ses->iface_count);
 412                         for (j = 0; j < ses->iface_count; j++) {
 413                                 seq_printf(m, "\t%d)", j);
 414                                 cifs_dump_iface(m, &ses->iface_list[j]);
 415                         }
 416                         spin_unlock(&ses->iface_lock);
 417                 }
 418         }
 419         spin_unlock(&cifs_tcp_ses_lock);
 420         seq_putc(m, '\n');
 421
 422         /* BB add code to dump additional info such as TCP session info now */
 423         return 0;
 424 }
 425
 426 static ssize_t cifs_stats_proc_write(struct file *file,
 427                 const char __user *buffer, size_t count, loff_t *ppos)
 428 {
 429         bool bv;
 430         int rc;
 431         struct list_head *tmp1, *tmp2, *tmp3;
 432         struct TCP_Server_Info *server;
 433         struct cifs_ses *ses;
 434         struct cifs_tcon *tcon;
 435
 436         rc = kstrtobool_from_user(buffer, count, &bv);
 437         if (rc == 0) {
 438 #ifdef CONFIG_CIFS_STATS2
 439                 int i;
 440
 441                 atomic_set(&totBufAllocCount, 0);
 442                 atomic_set(&totSmBufAllocCount, 0);
 443 #endif /* CONFIG_CIFS_STATS2 */
 444                 atomic_set(&tcpSesReconnectCount, 0);
 445                 atomic_set(&tconInfoReconnectCount, 0);
 446
 447                 spin_lock(&GlobalMid_Lock);
 448                 GlobalMaxActiveXid = 0;
 449                 GlobalCurrentXid = 0;
 450                 spin_unlock(&GlobalMid_Lock);
 451                 spin_lock(&cifs_tcp_ses_lock);
 452                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 453                         server = list_entry(tmp1, struct TCP_Server_Info,
 454                                             tcp_ses_list);
 455 #ifdef CONFIG_CIFS_STATS2
 456                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 457                                 atomic_set(&server->num_cmds[i], 0);
 458                                 atomic_set(&server->smb2slowcmd[i], 0);
 459                                 server->time_per_cmd[i] = 0;
 460                                 server->slowest_cmd[i] = 0;
 461                                 server->fastest_cmd[0] = 0;
 462                         }
 463 #endif /* CONFIG_CIFS_STATS2 */
 464                         list_for_each(tmp2, &server->smb_ses_list) {
 465                                 ses = list_entry(tmp2, struct cifs_ses,
 466                                                  smb_ses_list);
 467                                 list_for_each(tmp3, &ses->tcon_list) {
 468                                         tcon = list_entry(tmp3,
 469                                                           struct cifs_tcon,
 470                                                           tcon_list);
 471                                         atomic_set(&tcon->num_smbs_sent, 0);
 472                                         spin_lock(&tcon->stat_lock);
 473                                         tcon->bytes_read = 0;
 474                                         tcon->bytes_written = 0;
 475                                         spin_unlock(&tcon->stat_lock);
 476                                         if (server->ops->clear_stats)
 477                                                 server->ops->clear_stats(tcon);
 478                                 }
 479                         }
 480                 }
 481                 spin_unlock(&cifs_tcp_ses_lock);
 482         } else {
 483                 return rc;
 484         }
 485
 486         return count;
 487 }
 488
 489 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 490 {
 491         int i;
 492 #ifdef CONFIG_CIFS_STATS2
 493         int j;
 494 #endif /* STATS2 */
 495         struct list_head *tmp1, *tmp2, *tmp3;
 496         struct TCP_Server_Info *server;
 497         struct cifs_ses *ses;
 498         struct cifs_tcon *tcon;
 499
 500         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 501                         sesInfoAllocCount.counter);
 502         seq_printf(m, "Share (unique mount targets): %d\n",
 503                         tconInfoAllocCount.counter);
 504         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 505                         bufAllocCount.counter,
 506                         cifs_min_rcv + tcpSesAllocCount.counter);
 507         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 508                         smBufAllocCount.counter, cifs_min_small);
 509 #ifdef CONFIG_CIFS_STATS2
 510         seq_printf(m, "Total Large %d Small %d Allocations\n",
 511                                 atomic_read(&totBufAllocCount),
 512                                 atomic_read(&totSmBufAllocCount));
 513 #endif /* CONFIG_CIFS_STATS2 */
 514
 515         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 516         seq_printf(m,
 517                 "\n%d session %d share reconnects\n",
 518                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 519
 520         seq_printf(m,
 521                 "Total vfs operations: %d maximum at one time: %d\n",
 522                 GlobalCurrentXid, GlobalMaxActiveXid);
 523
 524         i = 0;
 525         spin_lock(&cifs_tcp_ses_lock);
 526         list_for_each(tmp1, &cifs_tcp_ses_list) {
 527                 server = list_entry(tmp1, struct TCP_Server_Info,
 528                                     tcp_ses_list);
 529 #ifdef CONFIG_CIFS_STATS2
 530                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 531                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 532                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 533                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 534                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 535                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 536                                 atomic_read(&server->num_cmds[j]),
 537                                 server->time_per_cmd[j],
 538                                 server->fastest_cmd[j],
 539                                 server->slowest_cmd[j]);
 540                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 541                         if (atomic_read(&server->smb2slowcmd[j]))
 542                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 543                                         atomic_read(&server->smb2slowcmd[j]),
 544                                         server->hostname, j);
 545 #endif /* STATS2 */
 546                 list_for_each(tmp2, &server->smb_ses_list) {
 547                         ses = list_entry(tmp2, struct cifs_ses,
 548                                          smb_ses_list);
 549                         list_for_each(tmp3, &ses->tcon_list) {
 550                                 tcon = list_entry(tmp3,
 551                                                   struct cifs_tcon,
 552                                                   tcon_list);
 553                                 i++;
 554                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 555                                 if (tcon->need_reconnect)
 556                                         seq_puts(m, "\tDISCONNECTED ");
 557                                 seq_printf(m, "\nSMBs: %d",
 558                                            atomic_read(&tcon->num_smbs_sent));
 559                                 if (server->ops->print_stats)
 560                                         server->ops->print_stats(m, tcon);
 561                         }
 562                 }
 563         }
 564         spin_unlock(&cifs_tcp_ses_lock);
 565
 566         seq_putc(m, '\n');
 567         return 0;
 568 }
 569
 570 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 571 {
 572         return single_open(file, cifs_stats_proc_show, NULL);
 573 }
 574
 575 static const struct file_operations cifs_stats_proc_fops = {
 576         .open           = cifs_stats_proc_open,
 577         .read           = seq_read,
 578         .llseek         = seq_lseek,
 579         .release        = single_release,
 580         .write          = cifs_stats_proc_write,
 581 };
 582
 583 #ifdef CONFIG_CIFS_SMB_DIRECT
 584 #define PROC_FILE_DEFINE(name) \
 585 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 586         size_t count, loff_t *ppos) \
 587 { \
 588         int rc; \
 589         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 590         if (rc) \
 591                 return rc; \
 592         return count; \
 593 } \
 594 static int name##_proc_show(struct seq_file *m, void *v) \
 595 { \
 596         seq_printf(m, "%d\n", name ); \
 597         return 0; \
 598 } \
 599 static int name##_open(struct inode *inode, struct file *file) \
 600 { \
 601         return single_open(file, name##_proc_show, NULL); \
 602 } \
 603 \
 604 static const struct file_operations cifs_##name##_proc_fops = { \
 605         .open           = name##_open, \
 606         .read           = seq_read, \
 607         .llseek         = seq_lseek, \
 608         .release        = single_release, \
 609         .write          = name##_write, \
 610 }
 611
 612 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 613 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 614 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 615 PROC_FILE_DEFINE(smbd_max_receive_size);
 616 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 617 PROC_FILE_DEFINE(smbd_max_send_size);
 618 PROC_FILE_DEFINE(smbd_send_credit_target);
 619 PROC_FILE_DEFINE(smbd_receive_credit_max);
 620 #endif
 621
 622 static struct proc_dir_entry *proc_fs_cifs;
 623 static const struct file_operations cifsFYI_proc_fops;
 624 static const struct file_operations cifs_lookup_cache_proc_fops;
 625 static const struct file_operations traceSMB_proc_fops;
 626 static const struct file_operations cifs_security_flags_proc_fops;
 627 static const struct file_operations cifs_linux_ext_proc_fops;
 628
 629 void
 630 cifs_proc_init(void)
 631 {
 632         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 633         if (proc_fs_cifs == NULL)
 634                 return;
 635
 636         proc_create_single("DebugData", 0, proc_fs_cifs,
 637                         cifs_debug_data_proc_show);
 638
 639         proc_create_single("open_files", 0400, proc_fs_cifs,
 640                         cifs_debug_files_proc_show);
 641
 642         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 643         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 644         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 645         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 646                     &cifs_linux_ext_proc_fops);
 647         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 648                     &cifs_security_flags_proc_fops);
 649         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 650                     &cifs_lookup_cache_proc_fops);
 651
 652 #ifdef CONFIG_CIFS_DFS_UPCALL
 653         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops);
 654 #endif
 655
 656 #ifdef CONFIG_CIFS_SMB_DIRECT
 657         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 658                 &cifs_rdma_readwrite_threshold_proc_fops);
 659         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 660                 &cifs_smbd_max_frmr_depth_proc_fops);
 661         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 662                 &cifs_smbd_keep_alive_interval_proc_fops);
 663         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 664                 &cifs_smbd_max_receive_size_proc_fops);
 665         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 666                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 667         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 668                 &cifs_smbd_max_send_size_proc_fops);
 669         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 670                 &cifs_smbd_send_credit_target_proc_fops);
 671         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 672                 &cifs_smbd_receive_credit_max_proc_fops);
 673 #endif
 674 }
 675
 676 void
 677 cifs_proc_clean(void)
 678 {
 679         if (proc_fs_cifs == NULL)
 680                 return;
 681
 682         remove_proc_entry("DebugData", proc_fs_cifs);
 683         remove_proc_entry("open_files", proc_fs_cifs);
 684         remove_proc_entry("cifsFYI", proc_fs_cifs);
 685         remove_proc_entry("traceSMB", proc_fs_cifs);
 686         remove_proc_entry("Stats", proc_fs_cifs);
 687         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 688         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 689         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 690
 691 #ifdef CONFIG_CIFS_DFS_UPCALL
 692         remove_proc_entry("dfscache", proc_fs_cifs);
 693 #endif
 694 #ifdef CONFIG_CIFS_SMB_DIRECT
 695         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 696         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 697         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 698         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 699         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 700         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 701         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 702         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 703 #endif
 704         remove_proc_entry("fs/cifs", NULL);
 705 }
 706
 707 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 708 {
 709         seq_printf(m, "%d\n", cifsFYI);
 710         return 0;
 711 }
 712
 713 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 714 {
 715         return single_open(file, cifsFYI_proc_show, NULL);
 716 }
 717
 718 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 719                 size_t count, loff_t *ppos)
 720 {
 721         char c[2] = { '\0' };
 722         bool bv;
 723         int rc;
 724
 725         rc = get_user(c[0], buffer);
 726         if (rc)
 727                 return rc;
 728         if (strtobool(c, &bv) == 0)
 729                 cifsFYI = bv;
 730         else if ((c[0] > '1') && (c[0] <= '9'))
 731                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 732         else
 733                 return -EINVAL;
 734
 735         return count;
 736 }
 737
 738 static const struct file_operations cifsFYI_proc_fops = {
 739         .open           = cifsFYI_proc_open,
 740         .read           = seq_read,
 741         .llseek         = seq_lseek,
 742         .release        = single_release,
 743         .write          = cifsFYI_proc_write,
 744 };
 745
 746 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 747 {
 748         seq_printf(m, "%d\n", linuxExtEnabled);
 749         return 0;
 750 }
 751
 752 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 753 {
 754         return single_open(file, cifs_linux_ext_proc_show, NULL);
 755 }
 756
 757 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 758                 const char __user *buffer, size_t count, loff_t *ppos)
 759 {
 760         int rc;
 761
 762         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 763         if (rc)
 764                 return rc;
 765
 766         return count;
 767 }
 768
 769 static const struct file_operations cifs_linux_ext_proc_fops = {
 770         .open           = cifs_linux_ext_proc_open,
 771         .read           = seq_read,
 772         .llseek         = seq_lseek,
 773         .release        = single_release,
 774         .write          = cifs_linux_ext_proc_write,
 775 };
 776
 777 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 778 {
 779         seq_printf(m, "%d\n", lookupCacheEnabled);
 780         return 0;
 781 }
 782
 783 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 784 {
 785         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 786 }
 787
 788 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 789                 const char __user *buffer, size_t count, loff_t *ppos)
 790 {
 791         int rc;
 792
 793         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 794         if (rc)
 795                 return rc;
 796
 797         return count;
 798 }
 799
 800 static const struct file_operations cifs_lookup_cache_proc_fops = {
 801         .open           = cifs_lookup_cache_proc_open,
 802         .read           = seq_read,
 803         .llseek         = seq_lseek,
 804         .release        = single_release,
 805         .write          = cifs_lookup_cache_proc_write,
 806 };
 807
 808 static int traceSMB_proc_show(struct seq_file *m, void *v)
 809 {
 810         seq_printf(m, "%d\n", traceSMB);
 811         return 0;
 812 }
 813
 814 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 815 {
 816         return single_open(file, traceSMB_proc_show, NULL);
 817 }
 818
 819 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 820                 size_t count, loff_t *ppos)
 821 {
 822         int rc;
 823
 824         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 825         if (rc)
 826                 return rc;
 827
 828         return count;
 829 }
 830
 831 static const struct file_operations traceSMB_proc_fops = {
 832         .open           = traceSMB_proc_open,
 833         .read           = seq_read,
 834         .llseek         = seq_lseek,
 835         .release        = single_release,
 836         .write          = traceSMB_proc_write,
 837 };
 838
 839 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 840 {
 841         seq_printf(m, "0x%x\n", global_secflags);
 842         return 0;
 843 }
 844
 845 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 846 {
 847         return single_open(file, cifs_security_flags_proc_show, NULL);
 848 }
 849
 850 /*
 851  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 852  * flags except for the ones corresponding to the given MUST flag. If there are
 853  * multiple MUST flags, then try to prefer more secure ones.
 854  */
 855 static void
 856 cifs_security_flags_handle_must_flags(unsigned int *flags)
 857 {
 858         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 859
 860         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 861                 *flags = CIFSSEC_MUST_KRB5;
 862         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 863                 *flags = CIFSSEC_MUST_NTLMSSP;
 864         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 865                 *flags = CIFSSEC_MUST_NTLMV2;
 866         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 867                 *flags = CIFSSEC_MUST_NTLM;
 868         else if (CIFSSEC_MUST_LANMAN &&
 869                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 870                 *flags = CIFSSEC_MUST_LANMAN;
 871         else if (CIFSSEC_MUST_PLNTXT &&
 872                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 873                 *flags = CIFSSEC_MUST_PLNTXT;
 874
 875         *flags |= signflags;
 876 }
 877
 878 static ssize_t cifs_security_flags_proc_write(struct file *file,
 879                 const char __user *buffer, size_t count, loff_t *ppos)
 880 {
 881         int rc;
 882         unsigned int flags;
 883         char flags_string[12];
 884         bool bv;
 885
 886         if ((count < 1) || (count > 11))
 887                 return -EINVAL;
 888
 889         memset(flags_string, 0, 12);
 890
 891         if (copy_from_user(flags_string, buffer, count))
 892                 return -EFAULT;
 893
 894         if (count < 3) {
 895                 /* single char or single char followed by null */
 896                 if (strtobool(flags_string, &bv) == 0) {
 897                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 898                         return count;
 899                 } else if (!isdigit(flags_string[0])) {
 900                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 901                                         flags_string);
 902                         return -EINVAL;
 903                 }
 904         }
 905
 906         /* else we have a number */
 907         rc = kstrtouint(flags_string, 0, &flags);
 908         if (rc) {
 909                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 910                                 flags_string);
 911                 return rc;
 912         }
 913
 914         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 915
 916         if (flags == 0)  {
 917                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 918                 return -EINVAL;
 919         }
 920
 921         if (flags & ~CIFSSEC_MASK) {
 922                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 923                          flags & ~CIFSSEC_MASK);
 924                 return -EINVAL;
 925         }
 926
 927         cifs_security_flags_handle_must_flags(&flags);
 928
 929         /* flags look ok - update the global security flags for cifs module */
 930         global_secflags = flags;
 931         if (global_secflags & CIFSSEC_MUST_SIGN) {
 932                 /* requiring signing implies signing is allowed */
 933                 global_secflags |= CIFSSEC_MAY_SIGN;
 934                 cifs_dbg(FYI, "packet signing now required\n");
 935         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 936                 cifs_dbg(FYI, "packet signing disabled\n");
 937         }
 938         /* BB should we turn on MAY flags for other MUST options? */
 939         return count;
 940 }
 941
 942 static const struct file_operations cifs_security_flags_proc_fops = {
 943         .open           = cifs_security_flags_proc_open,
 944         .read           = seq_read,
 945         .llseek         = seq_lseek,
 946         .release        = single_release,
 947         .write          = cifs_security_flags_proc_write,
 948 };
 949 #else
 950 inline void cifs_proc_init(void)
 951 {
 952 }
 953
 954 inline void cifs_proc_clean(void)
 955 {
 956 }
 957 #endif /* PROC_FS */