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 #include "fs_context.h"
  21 #ifdef CONFIG_CIFS_DFS_UPCALL
  22 #include "dfs_cache.h"
  23 #endif
  24 #ifdef CONFIG_CIFS_SMB_DIRECT
  25 #include "smbdirect.h"
  26 #endif
  27 #include "cifs_swn.h"
  28
  29 void
  30 cifs_dump_mem(char *label, void *data, int length)
  31 {
  32         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  33         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  34                        data, length, true);
  35 }
  36
  37 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  38 {
  39 #ifdef CONFIG_CIFS_DEBUG2
  40         struct smb_hdr *smb = (struct smb_hdr *)buf;
  41
  42         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  43                  smb->Command, smb->Status.CifsError,
  44                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  45         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  46                  server->ops->calc_smb_size(smb, server));
  47 #endif /* CONFIG_CIFS_DEBUG2 */
  48 }
  49
  50 void cifs_dump_mids(struct TCP_Server_Info *server)
  51 {
  52 #ifdef CONFIG_CIFS_DEBUG2
  53         struct mid_q_entry *mid_entry;
  54
  55         if (server == NULL)
  56                 return;
  57
  58         cifs_dbg(VFS, "Dump pending requests:\n");
  59         spin_lock(&GlobalMid_Lock);
  60         list_for_each_entry(mid_entry, &server->pending_mid_q, 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         if (tcon->use_witness)
 119                 seq_puts(m, " Witness");
 120
 121         if (tcon->need_reconnect)
 122                 seq_puts(m, "\tDISCONNECTED ");
 123         seq_putc(m, '\n');
 124 }
 125
 126 static void
 127 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 128 {
 129         struct TCP_Server_Info *server = chan->server;
 130
 131         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 132                    "\n\t\tNumber of credits: %d Dialect 0x%x"
 133                    "\n\t\tTCP status: %d Instance: %d"
 134                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 135                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 136                    i+1, server->conn_id,
 137                    server->credits,
 138                    server->dialect,
 139                    server->tcpStatus,
 140                    server->reconnect_instance,
 141                    server->srv_count,
 142                    server->sec_mode,
 143                    in_flight(server),
 144                    atomic_read(&server->in_send),
 145                    atomic_read(&server->num_waiters));
 146 }
 147
 148 static void
 149 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 150 {
 151         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 152         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 153
 154         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 155         seq_puts(m, "\t\tCapabilities: ");
 156         if (iface->rdma_capable)
 157                 seq_puts(m, "rdma ");
 158         if (iface->rss_capable)
 159                 seq_puts(m, "rss ");
 160         seq_putc(m, '\n');
 161         if (iface->sockaddr.ss_family == AF_INET)
 162                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 163         else if (iface->sockaddr.ss_family == AF_INET6)
 164                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 165 }
 166
 167 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 168 {
 169         struct list_head *tmp, *tmp1, *tmp2;
 170         struct TCP_Server_Info *server;
 171         struct cifs_ses *ses;
 172         struct cifs_tcon *tcon;
 173         struct cifsFileInfo *cfile;
 174
 175         seq_puts(m, "# Version:1\n");
 176         seq_puts(m, "# Format:\n");
 177         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 178 #ifdef CONFIG_CIFS_DEBUG2
 179         seq_printf(m, " <filename> <mid>\n");
 180 #else
 181         seq_printf(m, " <filename>\n");
 182 #endif /* CIFS_DEBUG2 */
 183         spin_lock(&cifs_tcp_ses_lock);
 184         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 185                 list_for_each(tmp, &server->smb_ses_list) {
 186                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 187                         list_for_each(tmp1, &ses->tcon_list) {
 188                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 189                                 spin_lock(&tcon->open_file_lock);
 190                                 list_for_each(tmp2, &tcon->openFileList) {
 191                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 192                                                      tlist);
 193                                         seq_printf(m,
 194                                                 "0x%x 0x%llx 0x%x %d %d %d %pd",
 195                                                 tcon->tid,
 196                                                 cfile->fid.persistent_fid,
 197                                                 cfile->f_flags,
 198                                                 cfile->count,
 199                                                 cfile->pid,
 200                                                 from_kuid(&init_user_ns, cfile->uid),
 201                                                 cfile->dentry);
 202 #ifdef CONFIG_CIFS_DEBUG2
 203                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 204 #else
 205                                         seq_printf(m, "\n");
 206 #endif /* CIFS_DEBUG2 */
 207                                 }
 208                                 spin_unlock(&tcon->open_file_lock);
 209                         }
 210                 }
 211         }
 212         spin_unlock(&cifs_tcp_ses_lock);
 213         seq_putc(m, '\n');
 214         return 0;
 215 }
 216
 217 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 218 {
 219         struct list_head *tmp2, *tmp3;
 220         struct mid_q_entry *mid_entry;
 221         struct TCP_Server_Info *server;
 222         struct cifs_ses *ses;
 223         struct cifs_tcon *tcon;
 224         int c, i, j;
 225
 226         seq_puts(m,
 227                     "Display Internal CIFS Data Structures for Debugging\n"
 228                     "---------------------------------------------------\n");
 229         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 230         seq_printf(m, "Features:");
 231 #ifdef CONFIG_CIFS_DFS_UPCALL
 232         seq_printf(m, " DFS");
 233 #endif
 234 #ifdef CONFIG_CIFS_FSCACHE
 235         seq_printf(m, ",FSCACHE");
 236 #endif
 237 #ifdef CONFIG_CIFS_SMB_DIRECT
 238         seq_printf(m, ",SMB_DIRECT");
 239 #endif
 240 #ifdef CONFIG_CIFS_STATS2
 241         seq_printf(m, ",STATS2");
 242 #else
 243         seq_printf(m, ",STATS");
 244 #endif
 245 #ifdef CONFIG_CIFS_DEBUG2
 246         seq_printf(m, ",DEBUG2");
 247 #elif defined(CONFIG_CIFS_DEBUG)
 248         seq_printf(m, ",DEBUG");
 249 #endif
 250 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 251         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 252 #endif
 253 #ifdef CONFIG_CIFS_POSIX
 254         seq_printf(m, ",CIFS_POSIX");
 255 #endif
 256 #ifdef CONFIG_CIFS_UPCALL
 257         seq_printf(m, ",UPCALL(SPNEGO)");
 258 #endif
 259 #ifdef CONFIG_CIFS_XATTR
 260         seq_printf(m, ",XATTR");
 261 #endif
 262         seq_printf(m, ",ACL");
 263 #ifdef CONFIG_CIFS_SWN_UPCALL
 264         seq_puts(m, ",WITNESS");
 265 #endif
 266         seq_putc(m, '\n');
 267         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 268         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 269
 270         seq_printf(m, "\nServers: ");
 271
 272         c = 0;
 273         spin_lock(&cifs_tcp_ses_lock);
 274         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 275                 if (server->is_channel)
 276                         continue;
 277
 278                 c++;
 279                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 280                         c, server->conn_id);
 281
 282                 if (server->hostname)
 283                         seq_printf(m, "Hostname: %s ", server->hostname);
 284 #ifdef CONFIG_CIFS_SMB_DIRECT
 285                 if (!server->rdma)
 286                         goto skip_rdma;
 287
 288                 if (!server->smbd_conn) {
 289                         seq_printf(m, "\nSMBDirect transport not available");
 290                         goto skip_rdma;
 291                 }
 292
 293                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 294                         "transport status: %x",
 295                         server->smbd_conn->protocol,
 296                         server->smbd_conn->transport_status);
 297                 seq_printf(m, "\nConn receive_credit_max: %x "
 298                         "send_credit_target: %x max_send_size: %x",
 299                         server->smbd_conn->receive_credit_max,
 300                         server->smbd_conn->send_credit_target,
 301                         server->smbd_conn->max_send_size);
 302                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 303                         "max_fragmented_send_size: %x max_receive_size:%x",
 304                         server->smbd_conn->max_fragmented_recv_size,
 305                         server->smbd_conn->max_fragmented_send_size,
 306                         server->smbd_conn->max_receive_size);
 307                 seq_printf(m, "\nConn keep_alive_interval: %x "
 308                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 309                         server->smbd_conn->keep_alive_interval,
 310                         server->smbd_conn->max_readwrite_size,
 311                         server->smbd_conn->rdma_readwrite_threshold);
 312                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 313                         "count_put_receive_buffer: %x count_send_empty: %x",
 314                         server->smbd_conn->count_get_receive_buffer,
 315                         server->smbd_conn->count_put_receive_buffer,
 316                         server->smbd_conn->count_send_empty);
 317                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 318                         "count_enqueue_reassembly_queue: %x "
 319                         "count_dequeue_reassembly_queue: %x "
 320                         "fragment_reassembly_remaining: %x "
 321                         "reassembly_data_length: %x "
 322                         "reassembly_queue_length: %x",
 323                         server->smbd_conn->count_reassembly_queue,
 324                         server->smbd_conn->count_enqueue_reassembly_queue,
 325                         server->smbd_conn->count_dequeue_reassembly_queue,
 326                         server->smbd_conn->fragment_reassembly_remaining,
 327                         server->smbd_conn->reassembly_data_length,
 328                         server->smbd_conn->reassembly_queue_length);
 329                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 330                         "receive_credits: %x receive_credit_target: %x",
 331                         atomic_read(&server->smbd_conn->send_credits),
 332                         atomic_read(&server->smbd_conn->receive_credits),
 333                         server->smbd_conn->receive_credit_target);
 334                 seq_printf(m, "\nPending send_pending: %x ",
 335                         atomic_read(&server->smbd_conn->send_pending));
 336                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 337                         "count_empty_packet_queue: %x",
 338                         server->smbd_conn->count_receive_queue,
 339                         server->smbd_conn->count_empty_packet_queue);
 340                 seq_printf(m, "\nMR responder_resources: %x "
 341                         "max_frmr_depth: %x mr_type: %x",
 342                         server->smbd_conn->responder_resources,
 343                         server->smbd_conn->max_frmr_depth,
 344                         server->smbd_conn->mr_type);
 345                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 346                         atomic_read(&server->smbd_conn->mr_ready_count),
 347                         atomic_read(&server->smbd_conn->mr_used_count));
 348 skip_rdma:
 349 #endif
 350                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 351                         server->credits,  server->dialect);
 352                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 353                         seq_printf(m, " COMPRESS_LZNT1");
 354                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 355                         seq_printf(m, " COMPRESS_LZ77");
 356                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 357                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 358                 if (server->sign)
 359                         seq_printf(m, " signed");
 360                 if (server->posix_ext_supported)
 361                         seq_printf(m, " posix");
 362
 363                 if (server->rdma)
 364                         seq_printf(m, "\nRDMA ");
 365                 seq_printf(m, "\nTCP status: %d Instance: %d"
 366                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 367                                 server->tcpStatus,
 368                                 server->reconnect_instance,
 369                                 server->srv_count,
 370                                 server->sec_mode, in_flight(server));
 371
 372                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 373                                 atomic_read(&server->in_send),
 374                                 atomic_read(&server->num_waiters));
 375
 376                 seq_printf(m, "\n\n\tSessions: ");
 377                 i = 0;
 378                 list_for_each(tmp2, &server->smb_ses_list) {
 379                         ses = list_entry(tmp2, struct cifs_ses,
 380                                          smb_ses_list);
 381                         i++;
 382                         if ((ses->serverDomain == NULL) ||
 383                                 (ses->serverOS == NULL) ||
 384                                 (ses->serverNOS == NULL)) {
 385                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 386                                         i, ses->ip_addr, ses->ses_count,
 387                                         ses->capabilities, ses->status);
 388                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 389                                         seq_printf(m, "Guest ");
 390                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 391                                         seq_printf(m, "Anonymous ");
 392                         } else {
 393                                 seq_printf(m,
 394                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 395                                     "\n\tNOS: %s\tCapability: 0x%x"
 396                                         "\n\tSMB session status: %d ",
 397                                 i, ses->ip_addr, ses->serverDomain,
 398                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 399                                 ses->capabilities, ses->status);
 400                         }
 401
 402                         seq_printf(m, "\n\tSecurity type: %s ",
 403                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 404
 405                         /* dump session id helpful for use with network trace */
 406                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 407                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 408                                 seq_puts(m, " encrypted");
 409                         if (ses->sign)
 410                                 seq_puts(m, " signed");
 411
 412                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 413                                    from_kuid(&init_user_ns, ses->linux_uid),
 414                                    from_kuid(&init_user_ns, ses->cred_uid));
 415
 416                         if (ses->chan_count > 1) {
 417                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 418                                            ses->chan_count-1);
 419                                 for (j = 1; j < ses->chan_count; j++)
 420                                         cifs_dump_channel(m, j, &ses->chans[j]);
 421                         }
 422
 423                         seq_puts(m, "\n\n\tShares: ");
 424                         j = 0;
 425
 426                         seq_printf(m, "\n\t%d) IPC: ", j);
 427                         if (ses->tcon_ipc)
 428                                 cifs_debug_tcon(m, ses->tcon_ipc);
 429                         else
 430                                 seq_puts(m, "none\n");
 431
 432                         list_for_each(tmp3, &ses->tcon_list) {
 433                                 tcon = list_entry(tmp3, struct cifs_tcon,
 434                                                   tcon_list);
 435                                 ++j;
 436                                 seq_printf(m, "\n\t%d) ", j);
 437                                 cifs_debug_tcon(m, tcon);
 438                         }
 439
 440                         spin_lock(&ses->iface_lock);
 441                         if (ses->iface_count)
 442                                 seq_printf(m, "\n\n\tServer interfaces: %zu",
 443                                            ses->iface_count);
 444                         for (j = 0; j < ses->iface_count; j++) {
 445                                 struct cifs_server_iface *iface;
 446
 447                                 iface = &ses->iface_list[j];
 448                                 seq_printf(m, "\n\t%d)", j+1);
 449                                 cifs_dump_iface(m, iface);
 450                                 if (is_ses_using_iface(ses, iface))
 451                                         seq_puts(m, "\t\t[CONNECTED]\n");
 452                         }
 453                         spin_unlock(&ses->iface_lock);
 454                 }
 455                 if (i == 0)
 456                         seq_printf(m, "\n\t\t[NONE]");
 457
 458                 seq_puts(m, "\n\n\tMIDs: ");
 459                 spin_lock(&GlobalMid_Lock);
 460                 list_for_each(tmp3, &server->pending_mid_q) {
 461                         mid_entry = list_entry(tmp3, struct mid_q_entry,
 462                                         qhead);
 463                         seq_printf(m, "\n\tState: %d com: %d pid:"
 464                                         " %d cbdata: %p mid %llu\n",
 465                                         mid_entry->mid_state,
 466                                         le16_to_cpu(mid_entry->command),
 467                                         mid_entry->pid,
 468                                         mid_entry->callback_data,
 469                                         mid_entry->mid);
 470                 }
 471                 spin_unlock(&GlobalMid_Lock);
 472                 seq_printf(m, "\n--\n");
 473         }
 474         if (c == 0)
 475                 seq_printf(m, "\n\t[NONE]");
 476
 477         spin_unlock(&cifs_tcp_ses_lock);
 478         seq_putc(m, '\n');
 479         cifs_swn_dump(m);
 480
 481         /* BB add code to dump additional info such as TCP session info now */
 482         return 0;
 483 }
 484
 485 static ssize_t cifs_stats_proc_write(struct file *file,
 486                 const char __user *buffer, size_t count, loff_t *ppos)
 487 {
 488         bool bv;
 489         int rc;
 490         struct list_head *tmp1, *tmp2, *tmp3;
 491         struct TCP_Server_Info *server;
 492         struct cifs_ses *ses;
 493         struct cifs_tcon *tcon;
 494
 495         rc = kstrtobool_from_user(buffer, count, &bv);
 496         if (rc == 0) {
 497 #ifdef CONFIG_CIFS_STATS2
 498                 int i;
 499
 500                 atomic_set(&totBufAllocCount, 0);
 501                 atomic_set(&totSmBufAllocCount, 0);
 502 #endif /* CONFIG_CIFS_STATS2 */
 503                 atomic_set(&tcpSesReconnectCount, 0);
 504                 atomic_set(&tconInfoReconnectCount, 0);
 505
 506                 spin_lock(&GlobalMid_Lock);
 507                 GlobalMaxActiveXid = 0;
 508                 GlobalCurrentXid = 0;
 509                 spin_unlock(&GlobalMid_Lock);
 510                 spin_lock(&cifs_tcp_ses_lock);
 511                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 512                         server = list_entry(tmp1, struct TCP_Server_Info,
 513                                             tcp_ses_list);
 514                         server->max_in_flight = 0;
 515 #ifdef CONFIG_CIFS_STATS2
 516                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 517                                 atomic_set(&server->num_cmds[i], 0);
 518                                 atomic_set(&server->smb2slowcmd[i], 0);
 519                                 server->time_per_cmd[i] = 0;
 520                                 server->slowest_cmd[i] = 0;
 521                                 server->fastest_cmd[0] = 0;
 522                         }
 523 #endif /* CONFIG_CIFS_STATS2 */
 524                         list_for_each(tmp2, &server->smb_ses_list) {
 525                                 ses = list_entry(tmp2, struct cifs_ses,
 526                                                  smb_ses_list);
 527                                 list_for_each(tmp3, &ses->tcon_list) {
 528                                         tcon = list_entry(tmp3,
 529                                                           struct cifs_tcon,
 530                                                           tcon_list);
 531                                         atomic_set(&tcon->num_smbs_sent, 0);
 532                                         spin_lock(&tcon->stat_lock);
 533                                         tcon->bytes_read = 0;
 534                                         tcon->bytes_written = 0;
 535                                         spin_unlock(&tcon->stat_lock);
 536                                         if (server->ops->clear_stats)
 537                                                 server->ops->clear_stats(tcon);
 538                                 }
 539                         }
 540                 }
 541                 spin_unlock(&cifs_tcp_ses_lock);
 542         } else {
 543                 return rc;
 544         }
 545
 546         return count;
 547 }
 548
 549 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 550 {
 551         int i;
 552 #ifdef CONFIG_CIFS_STATS2
 553         int j;
 554 #endif /* STATS2 */
 555         struct list_head *tmp2, *tmp3;
 556         struct TCP_Server_Info *server;
 557         struct cifs_ses *ses;
 558         struct cifs_tcon *tcon;
 559
 560         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 561                         sesInfoAllocCount.counter);
 562         seq_printf(m, "Share (unique mount targets): %d\n",
 563                         tconInfoAllocCount.counter);
 564         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 565                         bufAllocCount.counter,
 566                         cifs_min_rcv + tcpSesAllocCount.counter);
 567         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 568                         smBufAllocCount.counter, cifs_min_small);
 569 #ifdef CONFIG_CIFS_STATS2
 570         seq_printf(m, "Total Large %d Small %d Allocations\n",
 571                                 atomic_read(&totBufAllocCount),
 572                                 atomic_read(&totSmBufAllocCount));
 573 #endif /* CONFIG_CIFS_STATS2 */
 574
 575         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 576         seq_printf(m,
 577                 "\n%d session %d share reconnects\n",
 578                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 579
 580         seq_printf(m,
 581                 "Total vfs operations: %d maximum at one time: %d\n",
 582                 GlobalCurrentXid, GlobalMaxActiveXid);
 583
 584         i = 0;
 585         spin_lock(&cifs_tcp_ses_lock);
 586         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 587                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 588 #ifdef CONFIG_CIFS_STATS2
 589                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 590                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 591                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 592                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 593                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 594                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 595                                 atomic_read(&server->num_cmds[j]),
 596                                 server->time_per_cmd[j],
 597                                 server->fastest_cmd[j],
 598                                 server->slowest_cmd[j]);
 599                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 600                         if (atomic_read(&server->smb2slowcmd[j]))
 601                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 602                                         atomic_read(&server->smb2slowcmd[j]),
 603                                         server->hostname, j);
 604 #endif /* STATS2 */
 605                 list_for_each(tmp2, &server->smb_ses_list) {
 606                         ses = list_entry(tmp2, struct cifs_ses,
 607                                          smb_ses_list);
 608                         list_for_each(tmp3, &ses->tcon_list) {
 609                                 tcon = list_entry(tmp3,
 610                                                   struct cifs_tcon,
 611                                                   tcon_list);
 612                                 i++;
 613                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 614                                 if (tcon->need_reconnect)
 615                                         seq_puts(m, "\tDISCONNECTED ");
 616                                 seq_printf(m, "\nSMBs: %d",
 617                                            atomic_read(&tcon->num_smbs_sent));
 618                                 if (server->ops->print_stats)
 619                                         server->ops->print_stats(m, tcon);
 620                         }
 621                 }
 622         }
 623         spin_unlock(&cifs_tcp_ses_lock);
 624
 625         seq_putc(m, '\n');
 626         return 0;
 627 }
 628
 629 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 630 {
 631         return single_open(file, cifs_stats_proc_show, NULL);
 632 }
 633
 634 static const struct proc_ops cifs_stats_proc_ops = {
 635         .proc_open      = cifs_stats_proc_open,
 636         .proc_read      = seq_read,
 637         .proc_lseek     = seq_lseek,
 638         .proc_release   = single_release,
 639         .proc_write     = cifs_stats_proc_write,
 640 };
 641
 642 #ifdef CONFIG_CIFS_SMB_DIRECT
 643 #define PROC_FILE_DEFINE(name) \
 644 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 645         size_t count, loff_t *ppos) \
 646 { \
 647         int rc; \
 648         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 649         if (rc) \
 650                 return rc; \
 651         return count; \
 652 } \
 653 static int name##_proc_show(struct seq_file *m, void *v) \
 654 { \
 655         seq_printf(m, "%d\n", name ); \
 656         return 0; \
 657 } \
 658 static int name##_open(struct inode *inode, struct file *file) \
 659 { \
 660         return single_open(file, name##_proc_show, NULL); \
 661 } \
 662 \
 663 static const struct proc_ops cifs_##name##_proc_fops = { \
 664         .proc_open      = name##_open, \
 665         .proc_read      = seq_read, \
 666         .proc_lseek     = seq_lseek, \
 667         .proc_release   = single_release, \
 668         .proc_write     = name##_write, \
 669 }
 670
 671 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 672 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 673 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 674 PROC_FILE_DEFINE(smbd_max_receive_size);
 675 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 676 PROC_FILE_DEFINE(smbd_max_send_size);
 677 PROC_FILE_DEFINE(smbd_send_credit_target);
 678 PROC_FILE_DEFINE(smbd_receive_credit_max);
 679 #endif
 680
 681 static struct proc_dir_entry *proc_fs_cifs;
 682 static const struct proc_ops cifsFYI_proc_ops;
 683 static const struct proc_ops cifs_lookup_cache_proc_ops;
 684 static const struct proc_ops traceSMB_proc_ops;
 685 static const struct proc_ops cifs_security_flags_proc_ops;
 686 static const struct proc_ops cifs_linux_ext_proc_ops;
 687 static const struct proc_ops cifs_mount_params_proc_ops;
 688
 689 void
 690 cifs_proc_init(void)
 691 {
 692         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 693         if (proc_fs_cifs == NULL)
 694                 return;
 695
 696         proc_create_single("DebugData", 0, proc_fs_cifs,
 697                         cifs_debug_data_proc_show);
 698
 699         proc_create_single("open_files", 0400, proc_fs_cifs,
 700                         cifs_debug_files_proc_show);
 701
 702         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 703         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 704         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 705         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 706                     &cifs_linux_ext_proc_ops);
 707         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 708                     &cifs_security_flags_proc_ops);
 709         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 710                     &cifs_lookup_cache_proc_ops);
 711
 712         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 713
 714 #ifdef CONFIG_CIFS_DFS_UPCALL
 715         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 716 #endif
 717
 718 #ifdef CONFIG_CIFS_SMB_DIRECT
 719         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 720                 &cifs_rdma_readwrite_threshold_proc_fops);
 721         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 722                 &cifs_smbd_max_frmr_depth_proc_fops);
 723         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 724                 &cifs_smbd_keep_alive_interval_proc_fops);
 725         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 726                 &cifs_smbd_max_receive_size_proc_fops);
 727         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 728                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 729         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 730                 &cifs_smbd_max_send_size_proc_fops);
 731         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 732                 &cifs_smbd_send_credit_target_proc_fops);
 733         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 734                 &cifs_smbd_receive_credit_max_proc_fops);
 735 #endif
 736 }
 737
 738 void
 739 cifs_proc_clean(void)
 740 {
 741         if (proc_fs_cifs == NULL)
 742                 return;
 743
 744         remove_proc_entry("DebugData", proc_fs_cifs);
 745         remove_proc_entry("open_files", proc_fs_cifs);
 746         remove_proc_entry("cifsFYI", proc_fs_cifs);
 747         remove_proc_entry("traceSMB", proc_fs_cifs);
 748         remove_proc_entry("Stats", proc_fs_cifs);
 749         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 750         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 751         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 752         remove_proc_entry("mount_params", proc_fs_cifs);
 753
 754 #ifdef CONFIG_CIFS_DFS_UPCALL
 755         remove_proc_entry("dfscache", proc_fs_cifs);
 756 #endif
 757 #ifdef CONFIG_CIFS_SMB_DIRECT
 758         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 759         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 760         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 761         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 762         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 763         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 764         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 765         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 766 #endif
 767         remove_proc_entry("fs/cifs", NULL);
 768 }
 769
 770 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 771 {
 772         seq_printf(m, "%d\n", cifsFYI);
 773         return 0;
 774 }
 775
 776 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 777 {
 778         return single_open(file, cifsFYI_proc_show, NULL);
 779 }
 780
 781 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 782                 size_t count, loff_t *ppos)
 783 {
 784         char c[2] = { '\0' };
 785         bool bv;
 786         int rc;
 787
 788         rc = get_user(c[0], buffer);
 789         if (rc)
 790                 return rc;
 791         if (strtobool(c, &bv) == 0)
 792                 cifsFYI = bv;
 793         else if ((c[0] > '1') && (c[0] <= '9'))
 794                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 795         else
 796                 return -EINVAL;
 797
 798         return count;
 799 }
 800
 801 static const struct proc_ops cifsFYI_proc_ops = {
 802         .proc_open      = cifsFYI_proc_open,
 803         .proc_read      = seq_read,
 804         .proc_lseek     = seq_lseek,
 805         .proc_release   = single_release,
 806         .proc_write     = cifsFYI_proc_write,
 807 };
 808
 809 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 810 {
 811         seq_printf(m, "%d\n", linuxExtEnabled);
 812         return 0;
 813 }
 814
 815 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 816 {
 817         return single_open(file, cifs_linux_ext_proc_show, NULL);
 818 }
 819
 820 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 821                 const char __user *buffer, size_t count, loff_t *ppos)
 822 {
 823         int rc;
 824
 825         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 826         if (rc)
 827                 return rc;
 828
 829         return count;
 830 }
 831
 832 static const struct proc_ops cifs_linux_ext_proc_ops = {
 833         .proc_open      = cifs_linux_ext_proc_open,
 834         .proc_read      = seq_read,
 835         .proc_lseek     = seq_lseek,
 836         .proc_release   = single_release,
 837         .proc_write     = cifs_linux_ext_proc_write,
 838 };
 839
 840 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 841 {
 842         seq_printf(m, "%d\n", lookupCacheEnabled);
 843         return 0;
 844 }
 845
 846 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 847 {
 848         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 849 }
 850
 851 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 852                 const char __user *buffer, size_t count, loff_t *ppos)
 853 {
 854         int rc;
 855
 856         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 857         if (rc)
 858                 return rc;
 859
 860         return count;
 861 }
 862
 863 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 864         .proc_open      = cifs_lookup_cache_proc_open,
 865         .proc_read      = seq_read,
 866         .proc_lseek     = seq_lseek,
 867         .proc_release   = single_release,
 868         .proc_write     = cifs_lookup_cache_proc_write,
 869 };
 870
 871 static int traceSMB_proc_show(struct seq_file *m, void *v)
 872 {
 873         seq_printf(m, "%d\n", traceSMB);
 874         return 0;
 875 }
 876
 877 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 878 {
 879         return single_open(file, traceSMB_proc_show, NULL);
 880 }
 881
 882 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 883                 size_t count, loff_t *ppos)
 884 {
 885         int rc;
 886
 887         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 888         if (rc)
 889                 return rc;
 890
 891         return count;
 892 }
 893
 894 static const struct proc_ops traceSMB_proc_ops = {
 895         .proc_open      = traceSMB_proc_open,
 896         .proc_read      = seq_read,
 897         .proc_lseek     = seq_lseek,
 898         .proc_release   = single_release,
 899         .proc_write     = traceSMB_proc_write,
 900 };
 901
 902 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 903 {
 904         seq_printf(m, "0x%x\n", global_secflags);
 905         return 0;
 906 }
 907
 908 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 909 {
 910         return single_open(file, cifs_security_flags_proc_show, NULL);
 911 }
 912
 913 /*
 914  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 915  * flags except for the ones corresponding to the given MUST flag. If there are
 916  * multiple MUST flags, then try to prefer more secure ones.
 917  */
 918 static void
 919 cifs_security_flags_handle_must_flags(unsigned int *flags)
 920 {
 921         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 922
 923         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 924                 *flags = CIFSSEC_MUST_KRB5;
 925         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 926                 *flags = CIFSSEC_MUST_NTLMSSP;
 927         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 928                 *flags = CIFSSEC_MUST_NTLMV2;
 929
 930         *flags |= signflags;
 931 }
 932
 933 static ssize_t cifs_security_flags_proc_write(struct file *file,
 934                 const char __user *buffer, size_t count, loff_t *ppos)
 935 {
 936         int rc;
 937         unsigned int flags;
 938         char flags_string[12];
 939         bool bv;
 940
 941         if ((count < 1) || (count > 11))
 942                 return -EINVAL;
 943
 944         memset(flags_string, 0, 12);
 945
 946         if (copy_from_user(flags_string, buffer, count))
 947                 return -EFAULT;
 948
 949         if (count < 3) {
 950                 /* single char or single char followed by null */
 951                 if (strtobool(flags_string, &bv) == 0) {
 952                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 953                         return count;
 954                 } else if (!isdigit(flags_string[0])) {
 955                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 956                                         flags_string);
 957                         return -EINVAL;
 958                 }
 959         }
 960
 961         /* else we have a number */
 962         rc = kstrtouint(flags_string, 0, &flags);
 963         if (rc) {
 964                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 965                                 flags_string);
 966                 return rc;
 967         }
 968
 969         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 970
 971         if (flags == 0)  {
 972                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 973                 return -EINVAL;
 974         }
 975
 976         if (flags & ~CIFSSEC_MASK) {
 977                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 978                          flags & ~CIFSSEC_MASK);
 979                 return -EINVAL;
 980         }
 981
 982         cifs_security_flags_handle_must_flags(&flags);
 983
 984         /* flags look ok - update the global security flags for cifs module */
 985         global_secflags = flags;
 986         if (global_secflags & CIFSSEC_MUST_SIGN) {
 987                 /* requiring signing implies signing is allowed */
 988                 global_secflags |= CIFSSEC_MAY_SIGN;
 989                 cifs_dbg(FYI, "packet signing now required\n");
 990         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 991                 cifs_dbg(FYI, "packet signing disabled\n");
 992         }
 993         /* BB should we turn on MAY flags for other MUST options? */
 994         return count;
 995 }
 996
 997 static const struct proc_ops cifs_security_flags_proc_ops = {
 998         .proc_open      = cifs_security_flags_proc_open,
 999         .proc_read      = seq_read,
1000         .proc_lseek     = seq_lseek,
1001         .proc_release   = single_release,
1002         .proc_write     = cifs_security_flags_proc_write,
1003 };
1004
1005 /* To make it easier to debug, can help to show mount params */
1006 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1007 {
1008         const struct fs_parameter_spec *p;
1009         const char *type;
1010
1011         for (p = smb3_fs_parameters; p->name; p++) {
1012                 /* cannot use switch with pointers... */
1013                 if (!p->type) {
1014                         if (p->flags == fs_param_neg_with_no)
1015                                 type = "noflag";
1016                         else
1017                                 type = "flag";
1018                 } else if (p->type == fs_param_is_bool)
1019                         type = "bool";
1020                 else if (p->type == fs_param_is_u32)
1021                         type = "u32";
1022                 else if (p->type == fs_param_is_u64)
1023                         type = "u64";
1024                 else if (p->type == fs_param_is_string)
1025                         type = "string";
1026                 else
1027                         type = "unknown";
1028
1029                 seq_printf(m, "%s:%s\n", p->name, type);
1030         }
1031
1032         return 0;
1033 }
1034
1035 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1036 {
1037         return single_open(file, cifs_mount_params_proc_show, NULL);
1038 }
1039
1040 static const struct proc_ops cifs_mount_params_proc_ops = {
1041         .proc_open      = cifs_mount_params_proc_open,
1042         .proc_read      = seq_read,
1043         .proc_lseek     = seq_lseek,
1044         .proc_release   = single_release,
1045         /* No need for write for now */
1046         /* .proc_write  = cifs_mount_params_proc_write, */
1047 };
1048
1049 #else
1050 inline void cifs_proc_init(void)
1051 {
1052 }
1053
1054 inline void cifs_proc_clean(void)
1055 {
1056 }
1057 #endif /* PROC_FS */