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         const char *security_types[] = {"Unspecified", "LANMAN", "NTLM",
 225                                        "NTLMv2", "RawNTLMSSP", "Kerberos"};
 226
 227         seq_puts(m,
 228                     "Display Internal CIFS Data Structures for Debugging\n"
 229                     "---------------------------------------------------\n");
 230         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 231         seq_printf(m, "Features:");
 232 #ifdef CONFIG_CIFS_DFS_UPCALL
 233         seq_printf(m, " DFS");
 234 #endif
 235 #ifdef CONFIG_CIFS_FSCACHE
 236         seq_printf(m, ",FSCACHE");
 237 #endif
 238 #ifdef CONFIG_CIFS_SMB_DIRECT
 239         seq_printf(m, ",SMB_DIRECT");
 240 #endif
 241 #ifdef CONFIG_CIFS_STATS2
 242         seq_printf(m, ",STATS2");
 243 #else
 244         seq_printf(m, ",STATS");
 245 #endif
 246 #ifdef CONFIG_CIFS_DEBUG2
 247         seq_printf(m, ",DEBUG2");
 248 #elif defined(CONFIG_CIFS_DEBUG)
 249         seq_printf(m, ",DEBUG");
 250 #endif
 251 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 252         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 253 #endif
 254 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 255         seq_printf(m, ",WEAK_PW_HASH");
 256 #endif
 257 #ifdef CONFIG_CIFS_POSIX
 258         seq_printf(m, ",CIFS_POSIX");
 259 #endif
 260 #ifdef CONFIG_CIFS_UPCALL
 261         seq_printf(m, ",UPCALL(SPNEGO)");
 262 #endif
 263 #ifdef CONFIG_CIFS_XATTR
 264         seq_printf(m, ",XATTR");
 265 #endif
 266         seq_printf(m, ",ACL");
 267         seq_putc(m, '\n');
 268         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 269         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 270         seq_printf(m, "Servers:");
 271
 272         i = 0;
 273         spin_lock(&cifs_tcp_ses_lock);
 274         list_for_each(tmp1, &cifs_tcp_ses_list) {
 275                 server = list_entry(tmp1, struct TCP_Server_Info,
 276                                     tcp_ses_list);
 277
 278 #ifdef CONFIG_CIFS_SMB_DIRECT
 279                 if (!server->rdma)
 280                         goto skip_rdma;
 281
 282                 if (!server->smbd_conn) {
 283                         seq_printf(m, "\nSMBDirect transport not available");
 284                         goto skip_rdma;
 285                 }
 286
 287                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 288                         "transport status: %x",
 289                         server->smbd_conn->protocol,
 290                         server->smbd_conn->transport_status);
 291                 seq_printf(m, "\nConn receive_credit_max: %x "
 292                         "send_credit_target: %x max_send_size: %x",
 293                         server->smbd_conn->receive_credit_max,
 294                         server->smbd_conn->send_credit_target,
 295                         server->smbd_conn->max_send_size);
 296                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 297                         "max_fragmented_send_size: %x max_receive_size:%x",
 298                         server->smbd_conn->max_fragmented_recv_size,
 299                         server->smbd_conn->max_fragmented_send_size,
 300                         server->smbd_conn->max_receive_size);
 301                 seq_printf(m, "\nConn keep_alive_interval: %x "
 302                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 303                         server->smbd_conn->keep_alive_interval,
 304                         server->smbd_conn->max_readwrite_size,
 305                         server->smbd_conn->rdma_readwrite_threshold);
 306                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 307                         "count_put_receive_buffer: %x count_send_empty: %x",
 308                         server->smbd_conn->count_get_receive_buffer,
 309                         server->smbd_conn->count_put_receive_buffer,
 310                         server->smbd_conn->count_send_empty);
 311                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 312                         "count_enqueue_reassembly_queue: %x "
 313                         "count_dequeue_reassembly_queue: %x "
 314                         "fragment_reassembly_remaining: %x "
 315                         "reassembly_data_length: %x "
 316                         "reassembly_queue_length: %x",
 317                         server->smbd_conn->count_reassembly_queue,
 318                         server->smbd_conn->count_enqueue_reassembly_queue,
 319                         server->smbd_conn->count_dequeue_reassembly_queue,
 320                         server->smbd_conn->fragment_reassembly_remaining,
 321                         server->smbd_conn->reassembly_data_length,
 322                         server->smbd_conn->reassembly_queue_length);
 323                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 324                         "receive_credits: %x receive_credit_target: %x",
 325                         atomic_read(&server->smbd_conn->send_credits),
 326                         atomic_read(&server->smbd_conn->receive_credits),
 327                         server->smbd_conn->receive_credit_target);
 328                 seq_printf(m, "\nPending send_pending: %x ",
 329                         atomic_read(&server->smbd_conn->send_pending));
 330                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 331                         "count_empty_packet_queue: %x",
 332                         server->smbd_conn->count_receive_queue,
 333                         server->smbd_conn->count_empty_packet_queue);
 334                 seq_printf(m, "\nMR responder_resources: %x "
 335                         "max_frmr_depth: %x mr_type: %x",
 336                         server->smbd_conn->responder_resources,
 337                         server->smbd_conn->max_frmr_depth,
 338                         server->smbd_conn->mr_type);
 339                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 340                         atomic_read(&server->smbd_conn->mr_ready_count),
 341                         atomic_read(&server->smbd_conn->mr_used_count));
 342 skip_rdma:
 343 #endif
 344                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 345                         server->credits,  server->dialect);
 346                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 347                         seq_printf(m, " COMPRESS_LZNT1");
 348                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 349                         seq_printf(m, " COMPRESS_LZ77");
 350                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 351                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 352                 if (server->sign)
 353                         seq_printf(m, " signed");
 354                 if (server->posix_ext_supported)
 355                         seq_printf(m, " posix");
 356
 357                 i++;
 358                 list_for_each(tmp2, &server->smb_ses_list) {
 359                         ses = list_entry(tmp2, struct cifs_ses,
 360                                          smb_ses_list);
 361                         if ((ses->serverDomain == NULL) ||
 362                                 (ses->serverOS == NULL) ||
 363                                 (ses->serverNOS == NULL)) {
 364                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 365                                         i, ses->serverName, ses->ses_count,
 366                                         ses->capabilities, ses->status);
 367                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 368                                         seq_printf(m, "Guest\t");
 369                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 370                                         seq_printf(m, "Anonymous\t");
 371                         } else {
 372                                 seq_printf(m,
 373                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 374                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 375                                     " session status: %d ",
 376                                 i, ses->serverName, ses->serverDomain,
 377                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 378                                 ses->capabilities, ses->status);
 379                         }
 380
 381                         seq_printf(m,"Security type: %s\n",
 382                                       security_types[server->ops->select_sectype(server, ses->sectype)]);
 383
 384                         if (server->rdma)
 385                                 seq_printf(m, "RDMA\n\t");
 386                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 387                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 388                                    server->tcpStatus,
 389                                    server->reconnect_instance,
 390                                    server->srv_count,
 391                                    server->sec_mode, in_flight(server));
 392
 393                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 394                                 atomic_read(&server->in_send),
 395                                 atomic_read(&server->num_waiters));
 396
 397                         /* dump session id helpful for use with network trace */
 398                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 399                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 400                                 seq_puts(m, " encrypted");
 401                         if (ses->sign)
 402                                 seq_puts(m, " signed");
 403
 404                         if (ses->chan_count > 1) {
 405                                 seq_printf(m, "\n\n\tExtra Channels: %zu\n",
 406                                            ses->chan_count-1);
 407                                 for (j = 1; j < ses->chan_count; j++)
 408                                         cifs_dump_channel(m, j, &ses->chans[j]);
 409                         }
 410
 411                         seq_puts(m, "\n\tShares:");
 412                         j = 0;
 413
 414                         seq_printf(m, "\n\t%d) IPC: ", j);
 415                         if (ses->tcon_ipc)
 416                                 cifs_debug_tcon(m, ses->tcon_ipc);
 417                         else
 418                                 seq_puts(m, "none\n");
 419
 420                         list_for_each(tmp3, &ses->tcon_list) {
 421                                 tcon = list_entry(tmp3, struct cifs_tcon,
 422                                                   tcon_list);
 423                                 ++j;
 424                                 seq_printf(m, "\n\t%d) ", j);
 425                                 cifs_debug_tcon(m, tcon);
 426                         }
 427
 428                         seq_puts(m, "\n\tMIDs:\n");
 429
 430                         spin_lock(&GlobalMid_Lock);
 431                         list_for_each(tmp3, &server->pending_mid_q) {
 432                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 433                                         qhead);
 434                                 seq_printf(m, "\tState: %d com: %d pid:"
 435                                               " %d cbdata: %p mid %llu\n",
 436                                               mid_entry->mid_state,
 437                                               le16_to_cpu(mid_entry->command),
 438                                               mid_entry->pid,
 439                                               mid_entry->callback_data,
 440                                               mid_entry->mid);
 441                         }
 442                         spin_unlock(&GlobalMid_Lock);
 443
 444                         spin_lock(&ses->iface_lock);
 445                         if (ses->iface_count)
 446                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 447                                            ses->iface_count);
 448                         for (j = 0; j < ses->iface_count; j++) {
 449                                 struct cifs_server_iface *iface;
 450
 451                                 iface = &ses->iface_list[j];
 452                                 seq_printf(m, "\t%d)", j);
 453                                 cifs_dump_iface(m, iface);
 454                                 if (is_ses_using_iface(ses, iface))
 455                                         seq_puts(m, "\t\t[CONNECTED]\n");
 456                         }
 457                         spin_unlock(&ses->iface_lock);
 458                 }
 459         }
 460         spin_unlock(&cifs_tcp_ses_lock);
 461         seq_putc(m, '\n');
 462
 463         /* BB add code to dump additional info such as TCP session info now */
 464         return 0;
 465 }
 466
 467 static ssize_t cifs_stats_proc_write(struct file *file,
 468                 const char __user *buffer, size_t count, loff_t *ppos)
 469 {
 470         bool bv;
 471         int rc;
 472         struct list_head *tmp1, *tmp2, *tmp3;
 473         struct TCP_Server_Info *server;
 474         struct cifs_ses *ses;
 475         struct cifs_tcon *tcon;
 476
 477         rc = kstrtobool_from_user(buffer, count, &bv);
 478         if (rc == 0) {
 479 #ifdef CONFIG_CIFS_STATS2
 480                 int i;
 481
 482                 atomic_set(&totBufAllocCount, 0);
 483                 atomic_set(&totSmBufAllocCount, 0);
 484 #endif /* CONFIG_CIFS_STATS2 */
 485                 atomic_set(&tcpSesReconnectCount, 0);
 486                 atomic_set(&tconInfoReconnectCount, 0);
 487
 488                 spin_lock(&GlobalMid_Lock);
 489                 GlobalMaxActiveXid = 0;
 490                 GlobalCurrentXid = 0;
 491                 spin_unlock(&GlobalMid_Lock);
 492                 spin_lock(&cifs_tcp_ses_lock);
 493                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 494                         server = list_entry(tmp1, struct TCP_Server_Info,
 495                                             tcp_ses_list);
 496                         server->max_in_flight = 0;
 497 #ifdef CONFIG_CIFS_STATS2
 498                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 499                                 atomic_set(&server->num_cmds[i], 0);
 500                                 atomic_set(&server->smb2slowcmd[i], 0);
 501                                 server->time_per_cmd[i] = 0;
 502                                 server->slowest_cmd[i] = 0;
 503                                 server->fastest_cmd[0] = 0;
 504                         }
 505 #endif /* CONFIG_CIFS_STATS2 */
 506                         list_for_each(tmp2, &server->smb_ses_list) {
 507                                 ses = list_entry(tmp2, struct cifs_ses,
 508                                                  smb_ses_list);
 509                                 list_for_each(tmp3, &ses->tcon_list) {
 510                                         tcon = list_entry(tmp3,
 511                                                           struct cifs_tcon,
 512                                                           tcon_list);
 513                                         atomic_set(&tcon->num_smbs_sent, 0);
 514                                         spin_lock(&tcon->stat_lock);
 515                                         tcon->bytes_read = 0;
 516                                         tcon->bytes_written = 0;
 517                                         spin_unlock(&tcon->stat_lock);
 518                                         if (server->ops->clear_stats)
 519                                                 server->ops->clear_stats(tcon);
 520                                 }
 521                         }
 522                 }
 523                 spin_unlock(&cifs_tcp_ses_lock);
 524         } else {
 525                 return rc;
 526         }
 527
 528         return count;
 529 }
 530
 531 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 532 {
 533         int i;
 534 #ifdef CONFIG_CIFS_STATS2
 535         int j;
 536 #endif /* STATS2 */
 537         struct list_head *tmp1, *tmp2, *tmp3;
 538         struct TCP_Server_Info *server;
 539         struct cifs_ses *ses;
 540         struct cifs_tcon *tcon;
 541
 542         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 543                         sesInfoAllocCount.counter);
 544         seq_printf(m, "Share (unique mount targets): %d\n",
 545                         tconInfoAllocCount.counter);
 546         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 547                         bufAllocCount.counter,
 548                         cifs_min_rcv + tcpSesAllocCount.counter);
 549         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 550                         smBufAllocCount.counter, cifs_min_small);
 551 #ifdef CONFIG_CIFS_STATS2
 552         seq_printf(m, "Total Large %d Small %d Allocations\n",
 553                                 atomic_read(&totBufAllocCount),
 554                                 atomic_read(&totSmBufAllocCount));
 555 #endif /* CONFIG_CIFS_STATS2 */
 556
 557         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 558         seq_printf(m,
 559                 "\n%d session %d share reconnects\n",
 560                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 561
 562         seq_printf(m,
 563                 "Total vfs operations: %d maximum at one time: %d\n",
 564                 GlobalCurrentXid, GlobalMaxActiveXid);
 565
 566         i = 0;
 567         spin_lock(&cifs_tcp_ses_lock);
 568         list_for_each(tmp1, &cifs_tcp_ses_list) {
 569                 server = list_entry(tmp1, struct TCP_Server_Info,
 570                                     tcp_ses_list);
 571                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 572 #ifdef CONFIG_CIFS_STATS2
 573                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 574                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 575                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 576                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 577                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 578                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 579                                 atomic_read(&server->num_cmds[j]),
 580                                 server->time_per_cmd[j],
 581                                 server->fastest_cmd[j],
 582                                 server->slowest_cmd[j]);
 583                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 584                         if (atomic_read(&server->smb2slowcmd[j]))
 585                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 586                                         atomic_read(&server->smb2slowcmd[j]),
 587                                         server->hostname, j);
 588 #endif /* STATS2 */
 589                 list_for_each(tmp2, &server->smb_ses_list) {
 590                         ses = list_entry(tmp2, struct cifs_ses,
 591                                          smb_ses_list);
 592                         list_for_each(tmp3, &ses->tcon_list) {
 593                                 tcon = list_entry(tmp3,
 594                                                   struct cifs_tcon,
 595                                                   tcon_list);
 596                                 i++;
 597                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 598                                 if (tcon->need_reconnect)
 599                                         seq_puts(m, "\tDISCONNECTED ");
 600                                 seq_printf(m, "\nSMBs: %d",
 601                                            atomic_read(&tcon->num_smbs_sent));
 602                                 if (server->ops->print_stats)
 603                                         server->ops->print_stats(m, tcon);
 604                         }
 605                 }
 606         }
 607         spin_unlock(&cifs_tcp_ses_lock);
 608
 609         seq_putc(m, '\n');
 610         return 0;
 611 }
 612
 613 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 614 {
 615         return single_open(file, cifs_stats_proc_show, NULL);
 616 }
 617
 618 static const struct proc_ops cifs_stats_proc_ops = {
 619         .proc_open      = cifs_stats_proc_open,
 620         .proc_read      = seq_read,
 621         .proc_lseek     = seq_lseek,
 622         .proc_release   = single_release,
 623         .proc_write     = cifs_stats_proc_write,
 624 };
 625
 626 #ifdef CONFIG_CIFS_SMB_DIRECT
 627 #define PROC_FILE_DEFINE(name) \
 628 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 629         size_t count, loff_t *ppos) \
 630 { \
 631         int rc; \
 632         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 633         if (rc) \
 634                 return rc; \
 635         return count; \
 636 } \
 637 static int name##_proc_show(struct seq_file *m, void *v) \
 638 { \
 639         seq_printf(m, "%d\n", name ); \
 640         return 0; \
 641 } \
 642 static int name##_open(struct inode *inode, struct file *file) \
 643 { \
 644         return single_open(file, name##_proc_show, NULL); \
 645 } \
 646 \
 647 static const struct proc_ops cifs_##name##_proc_fops = { \
 648         .proc_open      = name##_open, \
 649         .proc_read      = seq_read, \
 650         .proc_lseek     = seq_lseek, \
 651         .proc_release   = single_release, \
 652         .proc_write     = name##_write, \
 653 }
 654
 655 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 656 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 657 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 658 PROC_FILE_DEFINE(smbd_max_receive_size);
 659 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 660 PROC_FILE_DEFINE(smbd_max_send_size);
 661 PROC_FILE_DEFINE(smbd_send_credit_target);
 662 PROC_FILE_DEFINE(smbd_receive_credit_max);
 663 #endif
 664
 665 static struct proc_dir_entry *proc_fs_cifs;
 666 static const struct proc_ops cifsFYI_proc_ops;
 667 static const struct proc_ops cifs_lookup_cache_proc_ops;
 668 static const struct proc_ops traceSMB_proc_ops;
 669 static const struct proc_ops cifs_security_flags_proc_ops;
 670 static const struct proc_ops cifs_linux_ext_proc_ops;
 671
 672 void
 673 cifs_proc_init(void)
 674 {
 675         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 676         if (proc_fs_cifs == NULL)
 677                 return;
 678
 679         proc_create_single("DebugData", 0, proc_fs_cifs,
 680                         cifs_debug_data_proc_show);
 681
 682         proc_create_single("open_files", 0400, proc_fs_cifs,
 683                         cifs_debug_files_proc_show);
 684
 685         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 686         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 687         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 688         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 689                     &cifs_linux_ext_proc_ops);
 690         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 691                     &cifs_security_flags_proc_ops);
 692         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 693                     &cifs_lookup_cache_proc_ops);
 694
 695 #ifdef CONFIG_CIFS_DFS_UPCALL
 696         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 697 #endif
 698
 699 #ifdef CONFIG_CIFS_SMB_DIRECT
 700         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 701                 &cifs_rdma_readwrite_threshold_proc_fops);
 702         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 703                 &cifs_smbd_max_frmr_depth_proc_fops);
 704         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 705                 &cifs_smbd_keep_alive_interval_proc_fops);
 706         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 707                 &cifs_smbd_max_receive_size_proc_fops);
 708         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 709                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 710         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 711                 &cifs_smbd_max_send_size_proc_fops);
 712         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 713                 &cifs_smbd_send_credit_target_proc_fops);
 714         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 715                 &cifs_smbd_receive_credit_max_proc_fops);
 716 #endif
 717 }
 718
 719 void
 720 cifs_proc_clean(void)
 721 {
 722         if (proc_fs_cifs == NULL)
 723                 return;
 724
 725         remove_proc_entry("DebugData", proc_fs_cifs);
 726         remove_proc_entry("open_files", proc_fs_cifs);
 727         remove_proc_entry("cifsFYI", proc_fs_cifs);
 728         remove_proc_entry("traceSMB", proc_fs_cifs);
 729         remove_proc_entry("Stats", proc_fs_cifs);
 730         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 731         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 732         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 733
 734 #ifdef CONFIG_CIFS_DFS_UPCALL
 735         remove_proc_entry("dfscache", proc_fs_cifs);
 736 #endif
 737 #ifdef CONFIG_CIFS_SMB_DIRECT
 738         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 739         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 740         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 741         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 742         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 743         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 744         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 745         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 746 #endif
 747         remove_proc_entry("fs/cifs", NULL);
 748 }
 749
 750 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 751 {
 752         seq_printf(m, "%d\n", cifsFYI);
 753         return 0;
 754 }
 755
 756 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 757 {
 758         return single_open(file, cifsFYI_proc_show, NULL);
 759 }
 760
 761 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 762                 size_t count, loff_t *ppos)
 763 {
 764         char c[2] = { '\0' };
 765         bool bv;
 766         int rc;
 767
 768         rc = get_user(c[0], buffer);
 769         if (rc)
 770                 return rc;
 771         if (strtobool(c, &bv) == 0)
 772                 cifsFYI = bv;
 773         else if ((c[0] > '1') && (c[0] <= '9'))
 774                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 775         else
 776                 return -EINVAL;
 777
 778         return count;
 779 }
 780
 781 static const struct proc_ops cifsFYI_proc_ops = {
 782         .proc_open      = cifsFYI_proc_open,
 783         .proc_read      = seq_read,
 784         .proc_lseek     = seq_lseek,
 785         .proc_release   = single_release,
 786         .proc_write     = cifsFYI_proc_write,
 787 };
 788
 789 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 790 {
 791         seq_printf(m, "%d\n", linuxExtEnabled);
 792         return 0;
 793 }
 794
 795 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 796 {
 797         return single_open(file, cifs_linux_ext_proc_show, NULL);
 798 }
 799
 800 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 801                 const char __user *buffer, size_t count, loff_t *ppos)
 802 {
 803         int rc;
 804
 805         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 806         if (rc)
 807                 return rc;
 808
 809         return count;
 810 }
 811
 812 static const struct proc_ops cifs_linux_ext_proc_ops = {
 813         .proc_open      = cifs_linux_ext_proc_open,
 814         .proc_read      = seq_read,
 815         .proc_lseek     = seq_lseek,
 816         .proc_release   = single_release,
 817         .proc_write     = cifs_linux_ext_proc_write,
 818 };
 819
 820 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 821 {
 822         seq_printf(m, "%d\n", lookupCacheEnabled);
 823         return 0;
 824 }
 825
 826 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 827 {
 828         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 829 }
 830
 831 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 832                 const char __user *buffer, size_t count, loff_t *ppos)
 833 {
 834         int rc;
 835
 836         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 837         if (rc)
 838                 return rc;
 839
 840         return count;
 841 }
 842
 843 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 844         .proc_open      = cifs_lookup_cache_proc_open,
 845         .proc_read      = seq_read,
 846         .proc_lseek     = seq_lseek,
 847         .proc_release   = single_release,
 848         .proc_write     = cifs_lookup_cache_proc_write,
 849 };
 850
 851 static int traceSMB_proc_show(struct seq_file *m, void *v)
 852 {
 853         seq_printf(m, "%d\n", traceSMB);
 854         return 0;
 855 }
 856
 857 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 858 {
 859         return single_open(file, traceSMB_proc_show, NULL);
 860 }
 861
 862 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 863                 size_t count, loff_t *ppos)
 864 {
 865         int rc;
 866
 867         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 868         if (rc)
 869                 return rc;
 870
 871         return count;
 872 }
 873
 874 static const struct proc_ops traceSMB_proc_ops = {
 875         .proc_open      = traceSMB_proc_open,
 876         .proc_read      = seq_read,
 877         .proc_lseek     = seq_lseek,
 878         .proc_release   = single_release,
 879         .proc_write     = traceSMB_proc_write,
 880 };
 881
 882 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 883 {
 884         seq_printf(m, "0x%x\n", global_secflags);
 885         return 0;
 886 }
 887
 888 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 889 {
 890         return single_open(file, cifs_security_flags_proc_show, NULL);
 891 }
 892
 893 /*
 894  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 895  * flags except for the ones corresponding to the given MUST flag. If there are
 896  * multiple MUST flags, then try to prefer more secure ones.
 897  */
 898 static void
 899 cifs_security_flags_handle_must_flags(unsigned int *flags)
 900 {
 901         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 902
 903         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 904                 *flags = CIFSSEC_MUST_KRB5;
 905         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 906                 *flags = CIFSSEC_MUST_NTLMSSP;
 907         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 908                 *flags = CIFSSEC_MUST_NTLMV2;
 909         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 910                 *flags = CIFSSEC_MUST_NTLM;
 911         else if (CIFSSEC_MUST_LANMAN &&
 912                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 913                 *flags = CIFSSEC_MUST_LANMAN;
 914         else if (CIFSSEC_MUST_PLNTXT &&
 915                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 916                 *flags = CIFSSEC_MUST_PLNTXT;
 917
 918         *flags |= signflags;
 919 }
 920
 921 static ssize_t cifs_security_flags_proc_write(struct file *file,
 922                 const char __user *buffer, size_t count, loff_t *ppos)
 923 {
 924         int rc;
 925         unsigned int flags;
 926         char flags_string[12];
 927         bool bv;
 928
 929         if ((count < 1) || (count > 11))
 930                 return -EINVAL;
 931
 932         memset(flags_string, 0, 12);
 933
 934         if (copy_from_user(flags_string, buffer, count))
 935                 return -EFAULT;
 936
 937         if (count < 3) {
 938                 /* single char or single char followed by null */
 939                 if (strtobool(flags_string, &bv) == 0) {
 940                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 941                         return count;
 942                 } else if (!isdigit(flags_string[0])) {
 943                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 944                                         flags_string);
 945                         return -EINVAL;
 946                 }
 947         }
 948
 949         /* else we have a number */
 950         rc = kstrtouint(flags_string, 0, &flags);
 951         if (rc) {
 952                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 953                                 flags_string);
 954                 return rc;
 955         }
 956
 957         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 958
 959         if (flags == 0)  {
 960                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 961                 return -EINVAL;
 962         }
 963
 964         if (flags & ~CIFSSEC_MASK) {
 965                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 966                          flags & ~CIFSSEC_MASK);
 967                 return -EINVAL;
 968         }
 969
 970         cifs_security_flags_handle_must_flags(&flags);
 971
 972         /* flags look ok - update the global security flags for cifs module */
 973         global_secflags = flags;
 974         if (global_secflags & CIFSSEC_MUST_SIGN) {
 975                 /* requiring signing implies signing is allowed */
 976                 global_secflags |= CIFSSEC_MAY_SIGN;
 977                 cifs_dbg(FYI, "packet signing now required\n");
 978         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 979                 cifs_dbg(FYI, "packet signing disabled\n");
 980         }
 981         /* BB should we turn on MAY flags for other MUST options? */
 982         return count;
 983 }
 984
 985 static const struct proc_ops cifs_security_flags_proc_ops = {
 986         .proc_open      = cifs_security_flags_proc_open,
 987         .proc_read      = seq_read,
 988         .proc_lseek     = seq_lseek,
 989         .proc_release   = single_release,
 990         .proc_write     = cifs_security_flags_proc_write,
 991 };
 992 #else
 993 inline void cifs_proc_init(void)
 994 {
 995 }
 996
 997 inline void cifs_proc_clean(void)
 998 {
 999 }
1000 #endif /* PROC_FS */