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_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 126 {
 127         struct TCP_Server_Info *server = chan->server;
 128
 129         seq_printf(m, "\t\tChannel %d Number of credits: %d Dialect 0x%x "
 130                    "TCP status: %d Instance: %d Local Users To Server: %d "
 131                    "SecMode: 0x%x Req On Wire: %d In Send: %d "
 132                    "In MaxReq Wait: %d\n",
 133                    i+1,
 134                    server->credits,
 135                    server->dialect,
 136                    server->tcpStatus,
 137                    server->reconnect_instance,
 138                    server->srv_count,
 139                    server->sec_mode,
 140                    in_flight(server),
 141                    atomic_read(&server->in_send),
 142                    atomic_read(&server->num_waiters));
 143 }
 144
 145 static void
 146 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 147 {
 148         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 149         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 150
 151         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 152         seq_puts(m, "\t\tCapabilities: ");
 153         if (iface->rdma_capable)
 154                 seq_puts(m, "rdma ");
 155         if (iface->rss_capable)
 156                 seq_puts(m, "rss ");
 157         seq_putc(m, '\n');
 158         if (iface->sockaddr.ss_family == AF_INET)
 159                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 160         else if (iface->sockaddr.ss_family == AF_INET6)
 161                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 162 }
 163
 164 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 165 {
 166         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 167         struct TCP_Server_Info *server;
 168         struct cifs_ses *ses;
 169         struct cifs_tcon *tcon;
 170         struct cifsFileInfo *cfile;
 171
 172         seq_puts(m, "# Version:1\n");
 173         seq_puts(m, "# Format:\n");
 174         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 175 #ifdef CONFIG_CIFS_DEBUG2
 176         seq_printf(m, " <filename> <mid>\n");
 177 #else
 178         seq_printf(m, " <filename>\n");
 179 #endif /* CIFS_DEBUG2 */
 180         spin_lock(&cifs_tcp_ses_lock);
 181         list_for_each(stmp, &cifs_tcp_ses_list) {
 182                 server = list_entry(stmp, struct TCP_Server_Info,
 183                                     tcp_ses_list);
 184                 list_for_each(tmp, &server->smb_ses_list) {
 185                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 186                         list_for_each(tmp1, &ses->tcon_list) {
 187                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 188                                 spin_lock(&tcon->open_file_lock);
 189                                 list_for_each(tmp2, &tcon->openFileList) {
 190                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 191                                                      tlist);
 192                                         seq_printf(m,
 193                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 194                                                 tcon->tid,
 195                                                 cfile->fid.persistent_fid,
 196                                                 cfile->f_flags,
 197                                                 cfile->count,
 198                                                 cfile->pid,
 199                                                 from_kuid(&init_user_ns, cfile->uid),
 200                                                 cfile->dentry->d_name.name);
 201 #ifdef CONFIG_CIFS_DEBUG2
 202                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 203 #else
 204                                         seq_printf(m, "\n");
 205 #endif /* CIFS_DEBUG2 */
 206                                 }
 207                                 spin_unlock(&tcon->open_file_lock);
 208                         }
 209                 }
 210         }
 211         spin_unlock(&cifs_tcp_ses_lock);
 212         seq_putc(m, '\n');
 213         return 0;
 214 }
 215
 216 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 217 {
 218         struct list_head *tmp1, *tmp2, *tmp3;
 219         struct mid_q_entry *mid_entry;
 220         struct TCP_Server_Info *server;
 221         struct cifs_ses *ses;
 222         struct cifs_tcon *tcon;
 223         int i, j;
 224
 225         seq_puts(m,
 226                     "Display Internal CIFS Data Structures for Debugging\n"
 227                     "---------------------------------------------------\n");
 228         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 229         seq_printf(m, "Features:");
 230 #ifdef CONFIG_CIFS_DFS_UPCALL
 231         seq_printf(m, " DFS");
 232 #endif
 233 #ifdef CONFIG_CIFS_FSCACHE
 234         seq_printf(m, ",FSCACHE");
 235 #endif
 236 #ifdef CONFIG_CIFS_SMB_DIRECT
 237         seq_printf(m, ",SMB_DIRECT");
 238 #endif
 239 #ifdef CONFIG_CIFS_STATS2
 240         seq_printf(m, ",STATS2");
 241 #else
 242         seq_printf(m, ",STATS");
 243 #endif
 244 #ifdef CONFIG_CIFS_DEBUG2
 245         seq_printf(m, ",DEBUG2");
 246 #elif defined(CONFIG_CIFS_DEBUG)
 247         seq_printf(m, ",DEBUG");
 248 #endif
 249 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 250         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 251 #endif
 252 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 253         seq_printf(m, ",WEAK_PW_HASH");
 254 #endif
 255 #ifdef CONFIG_CIFS_POSIX
 256         seq_printf(m, ",CIFS_POSIX");
 257 #endif
 258 #ifdef CONFIG_CIFS_UPCALL
 259         seq_printf(m, ",UPCALL(SPNEGO)");
 260 #endif
 261 #ifdef CONFIG_CIFS_XATTR
 262         seq_printf(m, ",XATTR");
 263 #endif
 264         seq_printf(m, ",ACL");
 265         seq_putc(m, '\n');
 266         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 267         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 268         seq_printf(m, "Servers:");
 269
 270         i = 0;
 271         spin_lock(&cifs_tcp_ses_lock);
 272         list_for_each(tmp1, &cifs_tcp_ses_list) {
 273                 server = list_entry(tmp1, struct TCP_Server_Info,
 274                                     tcp_ses_list);
 275
 276 #ifdef CONFIG_CIFS_SMB_DIRECT
 277                 if (!server->rdma)
 278                         goto skip_rdma;
 279
 280                 if (!server->smbd_conn) {
 281                         seq_printf(m, "\nSMBDirect transport not available");
 282                         goto skip_rdma;
 283                 }
 284
 285                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 286                         "transport status: %x",
 287                         server->smbd_conn->protocol,
 288                         server->smbd_conn->transport_status);
 289                 seq_printf(m, "\nConn receive_credit_max: %x "
 290                         "send_credit_target: %x max_send_size: %x",
 291                         server->smbd_conn->receive_credit_max,
 292                         server->smbd_conn->send_credit_target,
 293                         server->smbd_conn->max_send_size);
 294                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 295                         "max_fragmented_send_size: %x max_receive_size:%x",
 296                         server->smbd_conn->max_fragmented_recv_size,
 297                         server->smbd_conn->max_fragmented_send_size,
 298                         server->smbd_conn->max_receive_size);
 299                 seq_printf(m, "\nConn keep_alive_interval: %x "
 300                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 301                         server->smbd_conn->keep_alive_interval,
 302                         server->smbd_conn->max_readwrite_size,
 303                         server->smbd_conn->rdma_readwrite_threshold);
 304                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 305                         "count_put_receive_buffer: %x count_send_empty: %x",
 306                         server->smbd_conn->count_get_receive_buffer,
 307                         server->smbd_conn->count_put_receive_buffer,
 308                         server->smbd_conn->count_send_empty);
 309                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 310                         "count_enqueue_reassembly_queue: %x "
 311                         "count_dequeue_reassembly_queue: %x "
 312                         "fragment_reassembly_remaining: %x "
 313                         "reassembly_data_length: %x "
 314                         "reassembly_queue_length: %x",
 315                         server->smbd_conn->count_reassembly_queue,
 316                         server->smbd_conn->count_enqueue_reassembly_queue,
 317                         server->smbd_conn->count_dequeue_reassembly_queue,
 318                         server->smbd_conn->fragment_reassembly_remaining,
 319                         server->smbd_conn->reassembly_data_length,
 320                         server->smbd_conn->reassembly_queue_length);
 321                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 322                         "receive_credits: %x receive_credit_target: %x",
 323                         atomic_read(&server->smbd_conn->send_credits),
 324                         atomic_read(&server->smbd_conn->receive_credits),
 325                         server->smbd_conn->receive_credit_target);
 326                 seq_printf(m, "\nPending send_pending: %x ",
 327                         atomic_read(&server->smbd_conn->send_pending));
 328                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 329                         "count_empty_packet_queue: %x",
 330                         server->smbd_conn->count_receive_queue,
 331                         server->smbd_conn->count_empty_packet_queue);
 332                 seq_printf(m, "\nMR responder_resources: %x "
 333                         "max_frmr_depth: %x mr_type: %x",
 334                         server->smbd_conn->responder_resources,
 335                         server->smbd_conn->max_frmr_depth,
 336                         server->smbd_conn->mr_type);
 337                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 338                         atomic_read(&server->smbd_conn->mr_ready_count),
 339                         atomic_read(&server->smbd_conn->mr_used_count));
 340 skip_rdma:
 341 #endif
 342                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 343                         server->credits,  server->dialect);
 344                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 345                         seq_printf(m, " COMPRESS_LZNT1");
 346                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 347                         seq_printf(m, " COMPRESS_LZ77");
 348                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 349                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 350                 if (server->sign)
 351                         seq_printf(m, " signed");
 352                 if (server->posix_ext_supported)
 353                         seq_printf(m, " posix");
 354
 355                 i++;
 356                 list_for_each(tmp2, &server->smb_ses_list) {
 357                         ses = list_entry(tmp2, struct cifs_ses,
 358                                          smb_ses_list);
 359                         if ((ses->serverDomain == NULL) ||
 360                                 (ses->serverOS == NULL) ||
 361                                 (ses->serverNOS == NULL)) {
 362                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 363                                         i, ses->serverName, ses->ses_count,
 364                                         ses->capabilities, ses->status);
 365                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 366                                         seq_printf(m, "Guest\t");
 367                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 368                                         seq_printf(m, "Anonymous\t");
 369                         } else {
 370                                 seq_printf(m,
 371                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 372                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 373                                     " session status: %d ",
 374                                 i, ses->serverName, ses->serverDomain,
 375                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 376                                 ses->capabilities, ses->status);
 377                         }
 378                         if (server->rdma)
 379                                 seq_printf(m, "RDMA\n\t");
 380                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 381                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 382                                    server->tcpStatus,
 383                                    server->reconnect_instance,
 384                                    server->srv_count,
 385                                    server->sec_mode, in_flight(server));
 386
 387                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 388                                 atomic_read(&server->in_send),
 389                                 atomic_read(&server->num_waiters));
 390
 391                         /* dump session id helpful for use with network trace */
 392                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 393                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 394                                 seq_puts(m, " encrypted");
 395                         if (ses->sign)
 396                                 seq_puts(m, " signed");
 397
 398                         if (ses->chan_count > 1) {
 399                                 seq_printf(m, "\n\n\tExtra Channels: %zu\n",
 400                                            ses->chan_count-1);
 401                                 for (j = 1; j < ses->chan_count; j++)
 402                                         cifs_dump_channel(m, j, &ses->chans[j]);
 403                         }
 404
 405                         seq_puts(m, "\n\tShares:");
 406                         j = 0;
 407
 408                         seq_printf(m, "\n\t%d) IPC: ", j);
 409                         if (ses->tcon_ipc)
 410                                 cifs_debug_tcon(m, ses->tcon_ipc);
 411                         else
 412                                 seq_puts(m, "none\n");
 413
 414                         list_for_each(tmp3, &ses->tcon_list) {
 415                                 tcon = list_entry(tmp3, struct cifs_tcon,
 416                                                   tcon_list);
 417                                 ++j;
 418                                 seq_printf(m, "\n\t%d) ", j);
 419                                 cifs_debug_tcon(m, tcon);
 420                         }
 421
 422                         seq_puts(m, "\n\tMIDs:\n");
 423
 424                         spin_lock(&GlobalMid_Lock);
 425                         list_for_each(tmp3, &server->pending_mid_q) {
 426                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 427                                         qhead);
 428                                 seq_printf(m, "\tState: %d com: %d pid:"
 429                                               " %d cbdata: %p mid %llu\n",
 430                                               mid_entry->mid_state,
 431                                               le16_to_cpu(mid_entry->command),
 432                                               mid_entry->pid,
 433                                               mid_entry->callback_data,
 434                                               mid_entry->mid);
 435                         }
 436                         spin_unlock(&GlobalMid_Lock);
 437
 438                         spin_lock(&ses->iface_lock);
 439                         if (ses->iface_count)
 440                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 441                                            ses->iface_count);
 442                         for (j = 0; j < ses->iface_count; j++) {
 443                                 struct cifs_server_iface *iface;
 444
 445                                 iface = &ses->iface_list[j];
 446                                 seq_printf(m, "\t%d)", j);
 447                                 cifs_dump_iface(m, iface);
 448                                 if (is_ses_using_iface(ses, iface))
 449                                         seq_puts(m, "\t\t[CONNECTED]\n");
 450                         }
 451                         spin_unlock(&ses->iface_lock);
 452                 }
 453         }
 454         spin_unlock(&cifs_tcp_ses_lock);
 455         seq_putc(m, '\n');
 456
 457         /* BB add code to dump additional info such as TCP session info now */
 458         return 0;
 459 }
 460
 461 static ssize_t cifs_stats_proc_write(struct file *file,
 462                 const char __user *buffer, size_t count, loff_t *ppos)
 463 {
 464         bool bv;
 465         int rc;
 466         struct list_head *tmp1, *tmp2, *tmp3;
 467         struct TCP_Server_Info *server;
 468         struct cifs_ses *ses;
 469         struct cifs_tcon *tcon;
 470
 471         rc = kstrtobool_from_user(buffer, count, &bv);
 472         if (rc == 0) {
 473 #ifdef CONFIG_CIFS_STATS2
 474                 int i;
 475
 476                 atomic_set(&totBufAllocCount, 0);
 477                 atomic_set(&totSmBufAllocCount, 0);
 478 #endif /* CONFIG_CIFS_STATS2 */
 479                 atomic_set(&tcpSesReconnectCount, 0);
 480                 atomic_set(&tconInfoReconnectCount, 0);
 481
 482                 spin_lock(&GlobalMid_Lock);
 483                 GlobalMaxActiveXid = 0;
 484                 GlobalCurrentXid = 0;
 485                 spin_unlock(&GlobalMid_Lock);
 486                 spin_lock(&cifs_tcp_ses_lock);
 487                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 488                         server = list_entry(tmp1, struct TCP_Server_Info,
 489                                             tcp_ses_list);
 490                         server->max_in_flight = 0;
 491 #ifdef CONFIG_CIFS_STATS2
 492                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 493                                 atomic_set(&server->num_cmds[i], 0);
 494                                 atomic_set(&server->smb2slowcmd[i], 0);
 495                                 server->time_per_cmd[i] = 0;
 496                                 server->slowest_cmd[i] = 0;
 497                                 server->fastest_cmd[0] = 0;
 498                         }
 499 #endif /* CONFIG_CIFS_STATS2 */
 500                         list_for_each(tmp2, &server->smb_ses_list) {
 501                                 ses = list_entry(tmp2, struct cifs_ses,
 502                                                  smb_ses_list);
 503                                 list_for_each(tmp3, &ses->tcon_list) {
 504                                         tcon = list_entry(tmp3,
 505                                                           struct cifs_tcon,
 506                                                           tcon_list);
 507                                         atomic_set(&tcon->num_smbs_sent, 0);
 508                                         spin_lock(&tcon->stat_lock);
 509                                         tcon->bytes_read = 0;
 510                                         tcon->bytes_written = 0;
 511                                         spin_unlock(&tcon->stat_lock);
 512                                         if (server->ops->clear_stats)
 513                                                 server->ops->clear_stats(tcon);
 514                                 }
 515                         }
 516                 }
 517                 spin_unlock(&cifs_tcp_ses_lock);
 518         } else {
 519                 return rc;
 520         }
 521
 522         return count;
 523 }
 524
 525 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 526 {
 527         int i;
 528 #ifdef CONFIG_CIFS_STATS2
 529         int j;
 530 #endif /* STATS2 */
 531         struct list_head *tmp1, *tmp2, *tmp3;
 532         struct TCP_Server_Info *server;
 533         struct cifs_ses *ses;
 534         struct cifs_tcon *tcon;
 535
 536         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 537                         sesInfoAllocCount.counter);
 538         seq_printf(m, "Share (unique mount targets): %d\n",
 539                         tconInfoAllocCount.counter);
 540         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 541                         bufAllocCount.counter,
 542                         cifs_min_rcv + tcpSesAllocCount.counter);
 543         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 544                         smBufAllocCount.counter, cifs_min_small);
 545 #ifdef CONFIG_CIFS_STATS2
 546         seq_printf(m, "Total Large %d Small %d Allocations\n",
 547                                 atomic_read(&totBufAllocCount),
 548                                 atomic_read(&totSmBufAllocCount));
 549 #endif /* CONFIG_CIFS_STATS2 */
 550
 551         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 552         seq_printf(m,
 553                 "\n%d session %d share reconnects\n",
 554                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 555
 556         seq_printf(m,
 557                 "Total vfs operations: %d maximum at one time: %d\n",
 558                 GlobalCurrentXid, GlobalMaxActiveXid);
 559
 560         i = 0;
 561         spin_lock(&cifs_tcp_ses_lock);
 562         list_for_each(tmp1, &cifs_tcp_ses_list) {
 563                 server = list_entry(tmp1, struct TCP_Server_Info,
 564                                     tcp_ses_list);
 565                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 566 #ifdef CONFIG_CIFS_STATS2
 567                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 568                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 569                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 570                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 571                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 572                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 573                                 atomic_read(&server->num_cmds[j]),
 574                                 server->time_per_cmd[j],
 575                                 server->fastest_cmd[j],
 576                                 server->slowest_cmd[j]);
 577                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 578                         if (atomic_read(&server->smb2slowcmd[j]))
 579                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 580                                         atomic_read(&server->smb2slowcmd[j]),
 581                                         server->hostname, j);
 582 #endif /* STATS2 */
 583                 list_for_each(tmp2, &server->smb_ses_list) {
 584                         ses = list_entry(tmp2, struct cifs_ses,
 585                                          smb_ses_list);
 586                         list_for_each(tmp3, &ses->tcon_list) {
 587                                 tcon = list_entry(tmp3,
 588                                                   struct cifs_tcon,
 589                                                   tcon_list);
 590                                 i++;
 591                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 592                                 if (tcon->need_reconnect)
 593                                         seq_puts(m, "\tDISCONNECTED ");
 594                                 seq_printf(m, "\nSMBs: %d",
 595                                            atomic_read(&tcon->num_smbs_sent));
 596                                 if (server->ops->print_stats)
 597                                         server->ops->print_stats(m, tcon);
 598                         }
 599                 }
 600         }
 601         spin_unlock(&cifs_tcp_ses_lock);
 602
 603         seq_putc(m, '\n');
 604         return 0;
 605 }
 606
 607 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 608 {
 609         return single_open(file, cifs_stats_proc_show, NULL);
 610 }
 611
 612 static const struct proc_ops cifs_stats_proc_ops = {
 613         .proc_open      = cifs_stats_proc_open,
 614         .proc_read      = seq_read,
 615         .proc_lseek     = seq_lseek,
 616         .proc_release   = single_release,
 617         .proc_write     = cifs_stats_proc_write,
 618 };
 619
 620 #ifdef CONFIG_CIFS_SMB_DIRECT
 621 #define PROC_FILE_DEFINE(name) \
 622 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 623         size_t count, loff_t *ppos) \
 624 { \
 625         int rc; \
 626         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 627         if (rc) \
 628                 return rc; \
 629         return count; \
 630 } \
 631 static int name##_proc_show(struct seq_file *m, void *v) \
 632 { \
 633         seq_printf(m, "%d\n", name ); \
 634         return 0; \
 635 } \
 636 static int name##_open(struct inode *inode, struct file *file) \
 637 { \
 638         return single_open(file, name##_proc_show, NULL); \
 639 } \
 640 \
 641 static const struct proc_ops cifs_##name##_proc_fops = { \
 642         .proc_open      = name##_open, \
 643         .proc_read      = seq_read, \
 644         .proc_lseek     = seq_lseek, \
 645         .proc_release   = single_release, \
 646         .proc_write     = name##_write, \
 647 }
 648
 649 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 650 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 651 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 652 PROC_FILE_DEFINE(smbd_max_receive_size);
 653 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 654 PROC_FILE_DEFINE(smbd_max_send_size);
 655 PROC_FILE_DEFINE(smbd_send_credit_target);
 656 PROC_FILE_DEFINE(smbd_receive_credit_max);
 657 #endif
 658
 659 static struct proc_dir_entry *proc_fs_cifs;
 660 static const struct proc_ops cifsFYI_proc_ops;
 661 static const struct proc_ops cifs_lookup_cache_proc_ops;
 662 static const struct proc_ops traceSMB_proc_ops;
 663 static const struct proc_ops cifs_security_flags_proc_ops;
 664 static const struct proc_ops cifs_linux_ext_proc_ops;
 665
 666 void
 667 cifs_proc_init(void)
 668 {
 669         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 670         if (proc_fs_cifs == NULL)
 671                 return;
 672
 673         proc_create_single("DebugData", 0, proc_fs_cifs,
 674                         cifs_debug_data_proc_show);
 675
 676         proc_create_single("open_files", 0400, proc_fs_cifs,
 677                         cifs_debug_files_proc_show);
 678
 679         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 680         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 681         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 682         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 683                     &cifs_linux_ext_proc_ops);
 684         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 685                     &cifs_security_flags_proc_ops);
 686         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 687                     &cifs_lookup_cache_proc_ops);
 688
 689 #ifdef CONFIG_CIFS_DFS_UPCALL
 690         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 691 #endif
 692
 693 #ifdef CONFIG_CIFS_SMB_DIRECT
 694         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 695                 &cifs_rdma_readwrite_threshold_proc_fops);
 696         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 697                 &cifs_smbd_max_frmr_depth_proc_fops);
 698         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 699                 &cifs_smbd_keep_alive_interval_proc_fops);
 700         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 701                 &cifs_smbd_max_receive_size_proc_fops);
 702         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 703                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 704         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 705                 &cifs_smbd_max_send_size_proc_fops);
 706         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 707                 &cifs_smbd_send_credit_target_proc_fops);
 708         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 709                 &cifs_smbd_receive_credit_max_proc_fops);
 710 #endif
 711 }
 712
 713 void
 714 cifs_proc_clean(void)
 715 {
 716         if (proc_fs_cifs == NULL)
 717                 return;
 718
 719         remove_proc_entry("DebugData", proc_fs_cifs);
 720         remove_proc_entry("open_files", proc_fs_cifs);
 721         remove_proc_entry("cifsFYI", proc_fs_cifs);
 722         remove_proc_entry("traceSMB", proc_fs_cifs);
 723         remove_proc_entry("Stats", proc_fs_cifs);
 724         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 725         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 726         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 727
 728 #ifdef CONFIG_CIFS_DFS_UPCALL
 729         remove_proc_entry("dfscache", proc_fs_cifs);
 730 #endif
 731 #ifdef CONFIG_CIFS_SMB_DIRECT
 732         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 733         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 734         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 735         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 736         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 737         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 738         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 739         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 740 #endif
 741         remove_proc_entry("fs/cifs", NULL);
 742 }
 743
 744 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 745 {
 746         seq_printf(m, "%d\n", cifsFYI);
 747         return 0;
 748 }
 749
 750 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 751 {
 752         return single_open(file, cifsFYI_proc_show, NULL);
 753 }
 754
 755 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 756                 size_t count, loff_t *ppos)
 757 {
 758         char c[2] = { '\0' };
 759         bool bv;
 760         int rc;
 761
 762         rc = get_user(c[0], buffer);
 763         if (rc)
 764                 return rc;
 765         if (strtobool(c, &bv) == 0)
 766                 cifsFYI = bv;
 767         else if ((c[0] > '1') && (c[0] <= '9'))
 768                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 769         else
 770                 return -EINVAL;
 771
 772         return count;
 773 }
 774
 775 static const struct proc_ops cifsFYI_proc_ops = {
 776         .proc_open      = cifsFYI_proc_open,
 777         .proc_read      = seq_read,
 778         .proc_lseek     = seq_lseek,
 779         .proc_release   = single_release,
 780         .proc_write     = cifsFYI_proc_write,
 781 };
 782
 783 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 784 {
 785         seq_printf(m, "%d\n", linuxExtEnabled);
 786         return 0;
 787 }
 788
 789 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 790 {
 791         return single_open(file, cifs_linux_ext_proc_show, NULL);
 792 }
 793
 794 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 795                 const char __user *buffer, size_t count, loff_t *ppos)
 796 {
 797         int rc;
 798
 799         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 800         if (rc)
 801                 return rc;
 802
 803         return count;
 804 }
 805
 806 static const struct proc_ops cifs_linux_ext_proc_ops = {
 807         .proc_open      = cifs_linux_ext_proc_open,
 808         .proc_read      = seq_read,
 809         .proc_lseek     = seq_lseek,
 810         .proc_release   = single_release,
 811         .proc_write     = cifs_linux_ext_proc_write,
 812 };
 813
 814 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 815 {
 816         seq_printf(m, "%d\n", lookupCacheEnabled);
 817         return 0;
 818 }
 819
 820 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 821 {
 822         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 823 }
 824
 825 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 826                 const char __user *buffer, size_t count, loff_t *ppos)
 827 {
 828         int rc;
 829
 830         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 831         if (rc)
 832                 return rc;
 833
 834         return count;
 835 }
 836
 837 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 838         .proc_open      = cifs_lookup_cache_proc_open,
 839         .proc_read      = seq_read,
 840         .proc_lseek     = seq_lseek,
 841         .proc_release   = single_release,
 842         .proc_write     = cifs_lookup_cache_proc_write,
 843 };
 844
 845 static int traceSMB_proc_show(struct seq_file *m, void *v)
 846 {
 847         seq_printf(m, "%d\n", traceSMB);
 848         return 0;
 849 }
 850
 851 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 852 {
 853         return single_open(file, traceSMB_proc_show, NULL);
 854 }
 855
 856 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 857                 size_t count, loff_t *ppos)
 858 {
 859         int rc;
 860
 861         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 862         if (rc)
 863                 return rc;
 864
 865         return count;
 866 }
 867
 868 static const struct proc_ops traceSMB_proc_ops = {
 869         .proc_open      = traceSMB_proc_open,
 870         .proc_read      = seq_read,
 871         .proc_lseek     = seq_lseek,
 872         .proc_release   = single_release,
 873         .proc_write     = traceSMB_proc_write,
 874 };
 875
 876 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 877 {
 878         seq_printf(m, "0x%x\n", global_secflags);
 879         return 0;
 880 }
 881
 882 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 883 {
 884         return single_open(file, cifs_security_flags_proc_show, NULL);
 885 }
 886
 887 /*
 888  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 889  * flags except for the ones corresponding to the given MUST flag. If there are
 890  * multiple MUST flags, then try to prefer more secure ones.
 891  */
 892 static void
 893 cifs_security_flags_handle_must_flags(unsigned int *flags)
 894 {
 895         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 896
 897         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 898                 *flags = CIFSSEC_MUST_KRB5;
 899         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 900                 *flags = CIFSSEC_MUST_NTLMSSP;
 901         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 902                 *flags = CIFSSEC_MUST_NTLMV2;
 903         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 904                 *flags = CIFSSEC_MUST_NTLM;
 905         else if (CIFSSEC_MUST_LANMAN &&
 906                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 907                 *flags = CIFSSEC_MUST_LANMAN;
 908         else if (CIFSSEC_MUST_PLNTXT &&
 909                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 910                 *flags = CIFSSEC_MUST_PLNTXT;
 911
 912         *flags |= signflags;
 913 }
 914
 915 static ssize_t cifs_security_flags_proc_write(struct file *file,
 916                 const char __user *buffer, size_t count, loff_t *ppos)
 917 {
 918         int rc;
 919         unsigned int flags;
 920         char flags_string[12];
 921         bool bv;
 922
 923         if ((count < 1) || (count > 11))
 924                 return -EINVAL;
 925
 926         memset(flags_string, 0, 12);
 927
 928         if (copy_from_user(flags_string, buffer, count))
 929                 return -EFAULT;
 930
 931         if (count < 3) {
 932                 /* single char or single char followed by null */
 933                 if (strtobool(flags_string, &bv) == 0) {
 934                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 935                         return count;
 936                 } else if (!isdigit(flags_string[0])) {
 937                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 938                                         flags_string);
 939                         return -EINVAL;
 940                 }
 941         }
 942
 943         /* else we have a number */
 944         rc = kstrtouint(flags_string, 0, &flags);
 945         if (rc) {
 946                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 947                                 flags_string);
 948                 return rc;
 949         }
 950
 951         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 952
 953         if (flags == 0)  {
 954                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 955                 return -EINVAL;
 956         }
 957
 958         if (flags & ~CIFSSEC_MASK) {
 959                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 960                          flags & ~CIFSSEC_MASK);
 961                 return -EINVAL;
 962         }
 963
 964         cifs_security_flags_handle_must_flags(&flags);
 965
 966         /* flags look ok - update the global security flags for cifs module */
 967         global_secflags = flags;
 968         if (global_secflags & CIFSSEC_MUST_SIGN) {
 969                 /* requiring signing implies signing is allowed */
 970                 global_secflags |= CIFSSEC_MAY_SIGN;
 971                 cifs_dbg(FYI, "packet signing now required\n");
 972         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 973                 cifs_dbg(FYI, "packet signing disabled\n");
 974         }
 975         /* BB should we turn on MAY flags for other MUST options? */
 976         return count;
 977 }
 978
 979 static const struct proc_ops cifs_security_flags_proc_ops = {
 980         .proc_open      = cifs_security_flags_proc_open,
 981         .proc_read      = seq_read,
 982         .proc_lseek     = seq_lseek,
 983         .proc_release   = single_release,
 984         .proc_write     = cifs_security_flags_proc_write,
 985 };
 986 #else
 987 inline void cifs_proc_init(void)
 988 {
 989 }
 990
 991 inline void cifs_proc_clean(void)
 992 {
 993 }
 994 #endif /* PROC_FS */