fs/cifs/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2000,2005
   5  *
   6  *   Modified by Steve French (sfrench@us.ibm.com)
   7  */
   8 #include <linux/fs.h>
   9 #include <linux/string.h>
  10 #include <linux/ctype.h>
  11 #include <linux/module.h>
  12 #include <linux/proc_fs.h>
  13 #include <linux/uaccess.h>
  14 #include "cifspdu.h"
  15 #include "cifsglob.h"
  16 #include "cifsproto.h"
  17 #include "cifs_debug.h"
  18 #include "cifsfs.h"
  19 #include "fs_context.h"
  20 #ifdef CONFIG_CIFS_DFS_UPCALL
  21 #include "dfs_cache.h"
  22 #endif
  23 #ifdef CONFIG_CIFS_SMB_DIRECT
  24 #include "smbdirect.h"
  25 #endif
  26 #include "cifs_swn.h"
  27
  28 void
  29 cifs_dump_mem(char *label, void *data, int length)
  30 {
  31         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  32         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  33                        data, length, true);
  34 }
  35
  36 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  37 {
  38 #ifdef CONFIG_CIFS_DEBUG2
  39         struct smb_hdr *smb = (struct smb_hdr *)buf;
  40
  41         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  42                  smb->Command, smb->Status.CifsError,
  43                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  44         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  45                  server->ops->calc_smb_size(smb, server));
  46 #endif /* CONFIG_CIFS_DEBUG2 */
  47 }
  48
  49 void cifs_dump_mids(struct TCP_Server_Info *server)
  50 {
  51 #ifdef CONFIG_CIFS_DEBUG2
  52         struct mid_q_entry *mid_entry;
  53
  54         if (server == NULL)
  55                 return;
  56
  57         cifs_dbg(VFS, "Dump pending requests:\n");
  58         spin_lock(&GlobalMid_Lock);
  59         list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
  60                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  61                          mid_entry->mid_state,
  62                          le16_to_cpu(mid_entry->command),
  63                          mid_entry->pid,
  64                          mid_entry->callback_data,
  65                          mid_entry->mid);
  66 #ifdef CONFIG_CIFS_STATS2
  67                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  68                          mid_entry->large_buf,
  69                          mid_entry->resp_buf,
  70                          mid_entry->when_received,
  71                          jiffies);
  72 #endif /* STATS2 */
  73                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  74                          mid_entry->multiRsp, mid_entry->multiEnd);
  75                 if (mid_entry->resp_buf) {
  76                         cifs_dump_detail(mid_entry->resp_buf, server);
  77                         cifs_dump_mem("existing buf: ",
  78                                 mid_entry->resp_buf, 62);
  79                 }
  80         }
  81         spin_unlock(&GlobalMid_Lock);
  82 #endif /* CONFIG_CIFS_DEBUG2 */
  83 }
  84
  85 #ifdef CONFIG_PROC_FS
  86 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  87 {
  88         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  89
  90         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
  91         if (tcon->nativeFileSystem)
  92                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  93         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  94                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  95                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
  96                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  97                    tcon->status);
  98         if (dev_type == FILE_DEVICE_DISK)
  99                 seq_puts(m, " type: DISK ");
 100         else if (dev_type == FILE_DEVICE_CD_ROM)
 101                 seq_puts(m, " type: CDROM ");
 102         else
 103                 seq_printf(m, " type: %d ", dev_type);
 104
 105         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 106
 107         if ((tcon->seal) ||
 108             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 109             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 110                 seq_printf(m, " Encrypted");
 111         if (tcon->nocase)
 112                 seq_printf(m, " nocase");
 113         if (tcon->unix_ext)
 114                 seq_printf(m, " POSIX Extensions");
 115         if (tcon->ses->server->ops->dump_share_caps)
 116                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 117         if (tcon->use_witness)
 118                 seq_puts(m, " Witness");
 119         if (tcon->broken_sparse_sup)
 120                 seq_puts(m, " nosparse");
 121         if (tcon->need_reconnect)
 122                 seq_puts(m, "\tDISCONNECTED ");
 123         seq_putc(m, '\n');
 124 }
 125
 126 static void
 127 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 128 {
 129         struct TCP_Server_Info *server = chan->server;
 130
 131         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 132                    "\n\t\tNumber of credits: %d Dialect 0x%x"
 133                    "\n\t\tTCP status: %d Instance: %d"
 134                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 135                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 136                    i+1, server->conn_id,
 137                    server->credits,
 138                    server->dialect,
 139                    server->tcpStatus,
 140                    server->reconnect_instance,
 141                    server->srv_count,
 142                    server->sec_mode,
 143                    in_flight(server),
 144                    atomic_read(&server->in_send),
 145                    atomic_read(&server->num_waiters));
 146 }
 147
 148 static void
 149 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 150 {
 151         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 152         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 153
 154         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 155         seq_puts(m, "\t\tCapabilities: ");
 156         if (iface->rdma_capable)
 157                 seq_puts(m, "rdma ");
 158         if (iface->rss_capable)
 159                 seq_puts(m, "rss ");
 160         seq_putc(m, '\n');
 161         if (iface->sockaddr.ss_family == AF_INET)
 162                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 163         else if (iface->sockaddr.ss_family == AF_INET6)
 164                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 165 }
 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                 /* channel info will be printed as a part of sessions below */
 276                 if (CIFS_SERVER_IS_CHAN(server))
 277                         continue;
 278
 279                 c++;
 280                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 281                         c, server->conn_id);
 282
 283                 if (server->hostname)
 284                         seq_printf(m, "Hostname: %s ", server->hostname);
 285 #ifdef CONFIG_CIFS_SMB_DIRECT
 286                 if (!server->rdma)
 287                         goto skip_rdma;
 288
 289                 if (!server->smbd_conn) {
 290                         seq_printf(m, "\nSMBDirect transport not available");
 291                         goto skip_rdma;
 292                 }
 293
 294                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 295                         "transport status: %x",
 296                         server->smbd_conn->protocol,
 297                         server->smbd_conn->transport_status);
 298                 seq_printf(m, "\nConn receive_credit_max: %x "
 299                         "send_credit_target: %x max_send_size: %x",
 300                         server->smbd_conn->receive_credit_max,
 301                         server->smbd_conn->send_credit_target,
 302                         server->smbd_conn->max_send_size);
 303                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 304                         "max_fragmented_send_size: %x max_receive_size:%x",
 305                         server->smbd_conn->max_fragmented_recv_size,
 306                         server->smbd_conn->max_fragmented_send_size,
 307                         server->smbd_conn->max_receive_size);
 308                 seq_printf(m, "\nConn keep_alive_interval: %x "
 309                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 310                         server->smbd_conn->keep_alive_interval,
 311                         server->smbd_conn->max_readwrite_size,
 312                         server->smbd_conn->rdma_readwrite_threshold);
 313                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 314                         "count_put_receive_buffer: %x count_send_empty: %x",
 315                         server->smbd_conn->count_get_receive_buffer,
 316                         server->smbd_conn->count_put_receive_buffer,
 317                         server->smbd_conn->count_send_empty);
 318                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 319                         "count_enqueue_reassembly_queue: %x "
 320                         "count_dequeue_reassembly_queue: %x "
 321                         "fragment_reassembly_remaining: %x "
 322                         "reassembly_data_length: %x "
 323                         "reassembly_queue_length: %x",
 324                         server->smbd_conn->count_reassembly_queue,
 325                         server->smbd_conn->count_enqueue_reassembly_queue,
 326                         server->smbd_conn->count_dequeue_reassembly_queue,
 327                         server->smbd_conn->fragment_reassembly_remaining,
 328                         server->smbd_conn->reassembly_data_length,
 329                         server->smbd_conn->reassembly_queue_length);
 330                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 331                         "receive_credits: %x receive_credit_target: %x",
 332                         atomic_read(&server->smbd_conn->send_credits),
 333                         atomic_read(&server->smbd_conn->receive_credits),
 334                         server->smbd_conn->receive_credit_target);
 335                 seq_printf(m, "\nPending send_pending: %x ",
 336                         atomic_read(&server->smbd_conn->send_pending));
 337                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 338                         "count_empty_packet_queue: %x",
 339                         server->smbd_conn->count_receive_queue,
 340                         server->smbd_conn->count_empty_packet_queue);
 341                 seq_printf(m, "\nMR responder_resources: %x "
 342                         "max_frmr_depth: %x mr_type: %x",
 343                         server->smbd_conn->responder_resources,
 344                         server->smbd_conn->max_frmr_depth,
 345                         server->smbd_conn->mr_type);
 346                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 347                         atomic_read(&server->smbd_conn->mr_ready_count),
 348                         atomic_read(&server->smbd_conn->mr_used_count));
 349 skip_rdma:
 350 #endif
 351                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 352                         server->credits,  server->dialect);
 353                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 354                         seq_printf(m, " COMPRESS_LZNT1");
 355                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 356                         seq_printf(m, " COMPRESS_LZ77");
 357                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 358                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 359                 if (server->sign)
 360                         seq_printf(m, " signed");
 361                 if (server->posix_ext_supported)
 362                         seq_printf(m, " posix");
 363                 if (server->nosharesock)
 364                         seq_printf(m, " nosharesock");
 365
 366                 if (server->rdma)
 367                         seq_printf(m, "\nRDMA ");
 368                 seq_printf(m, "\nTCP status: %d Instance: %d"
 369                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 370                                 server->tcpStatus,
 371                                 server->reconnect_instance,
 372                                 server->srv_count,
 373                                 server->sec_mode, in_flight(server));
 374
 375                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 376                                 atomic_read(&server->in_send),
 377                                 atomic_read(&server->num_waiters));
 378
 379                 seq_printf(m, "\n\n\tSessions: ");
 380                 i = 0;
 381                 list_for_each(tmp2, &server->smb_ses_list) {
 382                         ses = list_entry(tmp2, struct cifs_ses,
 383                                          smb_ses_list);
 384                         i++;
 385                         if ((ses->serverDomain == NULL) ||
 386                                 (ses->serverOS == NULL) ||
 387                                 (ses->serverNOS == NULL)) {
 388                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 389                                         i, ses->ip_addr, ses->ses_count,
 390                                         ses->capabilities, ses->ses_status);
 391                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 392                                         seq_printf(m, "Guest ");
 393                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 394                                         seq_printf(m, "Anonymous ");
 395                         } else {
 396                                 seq_printf(m,
 397                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 398                                     "\n\tNOS: %s\tCapability: 0x%x"
 399                                         "\n\tSMB session status: %d ",
 400                                 i, ses->ip_addr, ses->serverDomain,
 401                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 402                                 ses->capabilities, ses->ses_status);
 403                         }
 404
 405                         seq_printf(m, "\n\tSecurity type: %s ",
 406                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 407
 408                         /* dump session id helpful for use with network trace */
 409                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 410                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 411                                 seq_puts(m, " encrypted");
 412                         if (ses->sign)
 413                                 seq_puts(m, " signed");
 414
 415                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 416                                    from_kuid(&init_user_ns, ses->linux_uid),
 417                                    from_kuid(&init_user_ns, ses->cred_uid));
 418
 419                         spin_lock(&ses->chan_lock);
 420                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
 421                                 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
 422                         if (CIFS_CHAN_IN_RECONNECT(ses, 0))
 423                                 seq_puts(m, "\t[RECONNECTING] ");
 424
 425                         if (ses->chan_count > 1) {
 426                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 427                                            ses->chan_count-1);
 428                                 for (j = 1; j < ses->chan_count; j++) {
 429                                         cifs_dump_channel(m, j, &ses->chans[j]);
 430                                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
 431                                                 seq_puts(m, "\tDISCONNECTED ");
 432                                         if (CIFS_CHAN_IN_RECONNECT(ses, j))
 433                                                 seq_puts(m, "\t[RECONNECTING] ");
 434                                 }
 435                         }
 436                         spin_unlock(&ses->chan_lock);
 437
 438                         seq_puts(m, "\n\n\tShares: ");
 439                         j = 0;
 440
 441                         seq_printf(m, "\n\t%d) IPC: ", j);
 442                         if (ses->tcon_ipc)
 443                                 cifs_debug_tcon(m, ses->tcon_ipc);
 444                         else
 445                                 seq_puts(m, "none\n");
 446
 447                         list_for_each(tmp3, &ses->tcon_list) {
 448                                 tcon = list_entry(tmp3, struct cifs_tcon,
 449                                                   tcon_list);
 450                                 ++j;
 451                                 seq_printf(m, "\n\t%d) ", j);
 452                                 cifs_debug_tcon(m, tcon);
 453                         }
 454
 455                         spin_lock(&ses->iface_lock);
 456                         if (ses->iface_count)
 457                                 seq_printf(m, "\n\n\tServer interfaces: %zu",
 458                                            ses->iface_count);
 459                         for (j = 0; j < ses->iface_count; j++) {
 460                                 struct cifs_server_iface *iface;
 461
 462                                 iface = &ses->iface_list[j];
 463                                 seq_printf(m, "\n\t%d)", j+1);
 464                                 cifs_dump_iface(m, iface);
 465                                 if (is_ses_using_iface(ses, iface))
 466                                         seq_puts(m, "\t\t[CONNECTED]\n");
 467                         }
 468                         spin_unlock(&ses->iface_lock);
 469                 }
 470                 if (i == 0)
 471                         seq_printf(m, "\n\t\t[NONE]");
 472
 473                 seq_puts(m, "\n\n\tMIDs: ");
 474                 spin_lock(&GlobalMid_Lock);
 475                 list_for_each(tmp3, &server->pending_mid_q) {
 476                         mid_entry = list_entry(tmp3, struct mid_q_entry,
 477                                         qhead);
 478                         seq_printf(m, "\n\tState: %d com: %d pid:"
 479                                         " %d cbdata: %p mid %llu\n",
 480                                         mid_entry->mid_state,
 481                                         le16_to_cpu(mid_entry->command),
 482                                         mid_entry->pid,
 483                                         mid_entry->callback_data,
 484                                         mid_entry->mid);
 485                 }
 486                 spin_unlock(&GlobalMid_Lock);
 487                 seq_printf(m, "\n--\n");
 488         }
 489         if (c == 0)
 490                 seq_printf(m, "\n\t[NONE]");
 491
 492         spin_unlock(&cifs_tcp_ses_lock);
 493         seq_putc(m, '\n');
 494         cifs_swn_dump(m);
 495
 496         /* BB add code to dump additional info such as TCP session info now */
 497         return 0;
 498 }
 499
 500 static ssize_t cifs_stats_proc_write(struct file *file,
 501                 const char __user *buffer, size_t count, loff_t *ppos)
 502 {
 503         bool bv;
 504         int rc;
 505         struct list_head *tmp1, *tmp2, *tmp3;
 506         struct TCP_Server_Info *server;
 507         struct cifs_ses *ses;
 508         struct cifs_tcon *tcon;
 509
 510         rc = kstrtobool_from_user(buffer, count, &bv);
 511         if (rc == 0) {
 512 #ifdef CONFIG_CIFS_STATS2
 513                 int i;
 514
 515                 atomic_set(&totBufAllocCount, 0);
 516                 atomic_set(&totSmBufAllocCount, 0);
 517 #endif /* CONFIG_CIFS_STATS2 */
 518                 atomic_set(&tcpSesReconnectCount, 0);
 519                 atomic_set(&tconInfoReconnectCount, 0);
 520
 521                 spin_lock(&GlobalMid_Lock);
 522                 GlobalMaxActiveXid = 0;
 523                 GlobalCurrentXid = 0;
 524                 spin_unlock(&GlobalMid_Lock);
 525                 spin_lock(&cifs_tcp_ses_lock);
 526                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 527                         server = list_entry(tmp1, struct TCP_Server_Info,
 528                                             tcp_ses_list);
 529                         server->max_in_flight = 0;
 530 #ifdef CONFIG_CIFS_STATS2
 531                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 532                                 atomic_set(&server->num_cmds[i], 0);
 533                                 atomic_set(&server->smb2slowcmd[i], 0);
 534                                 server->time_per_cmd[i] = 0;
 535                                 server->slowest_cmd[i] = 0;
 536                                 server->fastest_cmd[0] = 0;
 537                         }
 538 #endif /* CONFIG_CIFS_STATS2 */
 539                         list_for_each(tmp2, &server->smb_ses_list) {
 540                                 ses = list_entry(tmp2, struct cifs_ses,
 541                                                  smb_ses_list);
 542                                 list_for_each(tmp3, &ses->tcon_list) {
 543                                         tcon = list_entry(tmp3,
 544                                                           struct cifs_tcon,
 545                                                           tcon_list);
 546                                         atomic_set(&tcon->num_smbs_sent, 0);
 547                                         spin_lock(&tcon->stat_lock);
 548                                         tcon->bytes_read = 0;
 549                                         tcon->bytes_written = 0;
 550                                         spin_unlock(&tcon->stat_lock);
 551                                         if (server->ops->clear_stats)
 552                                                 server->ops->clear_stats(tcon);
 553                                 }
 554                         }
 555                 }
 556                 spin_unlock(&cifs_tcp_ses_lock);
 557         } else {
 558                 return rc;
 559         }
 560
 561         return count;
 562 }
 563
 564 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 565 {
 566         int i;
 567 #ifdef CONFIG_CIFS_STATS2
 568         int j;
 569 #endif /* STATS2 */
 570         struct list_head *tmp2, *tmp3;
 571         struct TCP_Server_Info *server;
 572         struct cifs_ses *ses;
 573         struct cifs_tcon *tcon;
 574
 575         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 576                         sesInfoAllocCount.counter);
 577         seq_printf(m, "Share (unique mount targets): %d\n",
 578                         tconInfoAllocCount.counter);
 579         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 580                         bufAllocCount.counter,
 581                         cifs_min_rcv + tcpSesAllocCount.counter);
 582         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 583                         smBufAllocCount.counter, cifs_min_small);
 584 #ifdef CONFIG_CIFS_STATS2
 585         seq_printf(m, "Total Large %d Small %d Allocations\n",
 586                                 atomic_read(&totBufAllocCount),
 587                                 atomic_read(&totSmBufAllocCount));
 588 #endif /* CONFIG_CIFS_STATS2 */
 589
 590         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 591         seq_printf(m,
 592                 "\n%d session %d share reconnects\n",
 593                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 594
 595         seq_printf(m,
 596                 "Total vfs operations: %d maximum at one time: %d\n",
 597                 GlobalCurrentXid, GlobalMaxActiveXid);
 598
 599         i = 0;
 600         spin_lock(&cifs_tcp_ses_lock);
 601         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 602                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 603 #ifdef CONFIG_CIFS_STATS2
 604                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 605                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 606                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 607                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 608                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 609                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 610                                 atomic_read(&server->num_cmds[j]),
 611                                 server->time_per_cmd[j],
 612                                 server->fastest_cmd[j],
 613                                 server->slowest_cmd[j]);
 614                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 615                         if (atomic_read(&server->smb2slowcmd[j]))
 616                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 617                                         atomic_read(&server->smb2slowcmd[j]),
 618                                         server->hostname, j);
 619 #endif /* STATS2 */
 620                 list_for_each(tmp2, &server->smb_ses_list) {
 621                         ses = list_entry(tmp2, struct cifs_ses,
 622                                          smb_ses_list);
 623                         list_for_each(tmp3, &ses->tcon_list) {
 624                                 tcon = list_entry(tmp3,
 625                                                   struct cifs_tcon,
 626                                                   tcon_list);
 627                                 i++;
 628                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 629                                 if (tcon->need_reconnect)
 630                                         seq_puts(m, "\tDISCONNECTED ");
 631                                 seq_printf(m, "\nSMBs: %d",
 632                                            atomic_read(&tcon->num_smbs_sent));
 633                                 if (server->ops->print_stats)
 634                                         server->ops->print_stats(m, tcon);
 635                         }
 636                 }
 637         }
 638         spin_unlock(&cifs_tcp_ses_lock);
 639
 640         seq_putc(m, '\n');
 641         return 0;
 642 }
 643
 644 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 645 {
 646         return single_open(file, cifs_stats_proc_show, NULL);
 647 }
 648
 649 static const struct proc_ops cifs_stats_proc_ops = {
 650         .proc_open      = cifs_stats_proc_open,
 651         .proc_read      = seq_read,
 652         .proc_lseek     = seq_lseek,
 653         .proc_release   = single_release,
 654         .proc_write     = cifs_stats_proc_write,
 655 };
 656
 657 #ifdef CONFIG_CIFS_SMB_DIRECT
 658 #define PROC_FILE_DEFINE(name) \
 659 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 660         size_t count, loff_t *ppos) \
 661 { \
 662         int rc; \
 663         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 664         if (rc) \
 665                 return rc; \
 666         return count; \
 667 } \
 668 static int name##_proc_show(struct seq_file *m, void *v) \
 669 { \
 670         seq_printf(m, "%d\n", name ); \
 671         return 0; \
 672 } \
 673 static int name##_open(struct inode *inode, struct file *file) \
 674 { \
 675         return single_open(file, name##_proc_show, NULL); \
 676 } \
 677 \
 678 static const struct proc_ops cifs_##name##_proc_fops = { \
 679         .proc_open      = name##_open, \
 680         .proc_read      = seq_read, \
 681         .proc_lseek     = seq_lseek, \
 682         .proc_release   = single_release, \
 683         .proc_write     = name##_write, \
 684 }
 685
 686 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 687 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 688 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 689 PROC_FILE_DEFINE(smbd_max_receive_size);
 690 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 691 PROC_FILE_DEFINE(smbd_max_send_size);
 692 PROC_FILE_DEFINE(smbd_send_credit_target);
 693 PROC_FILE_DEFINE(smbd_receive_credit_max);
 694 #endif
 695
 696 static struct proc_dir_entry *proc_fs_cifs;
 697 static const struct proc_ops cifsFYI_proc_ops;
 698 static const struct proc_ops cifs_lookup_cache_proc_ops;
 699 static const struct proc_ops traceSMB_proc_ops;
 700 static const struct proc_ops cifs_security_flags_proc_ops;
 701 static const struct proc_ops cifs_linux_ext_proc_ops;
 702 static const struct proc_ops cifs_mount_params_proc_ops;
 703
 704 void
 705 cifs_proc_init(void)
 706 {
 707         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 708         if (proc_fs_cifs == NULL)
 709                 return;
 710
 711         proc_create_single("DebugData", 0, proc_fs_cifs,
 712                         cifs_debug_data_proc_show);
 713
 714         proc_create_single("open_files", 0400, proc_fs_cifs,
 715                         cifs_debug_files_proc_show);
 716
 717         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 718         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 719         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 720         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 721                     &cifs_linux_ext_proc_ops);
 722         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 723                     &cifs_security_flags_proc_ops);
 724         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 725                     &cifs_lookup_cache_proc_ops);
 726
 727         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 728
 729 #ifdef CONFIG_CIFS_DFS_UPCALL
 730         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 731 #endif
 732
 733 #ifdef CONFIG_CIFS_SMB_DIRECT
 734         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 735                 &cifs_rdma_readwrite_threshold_proc_fops);
 736         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 737                 &cifs_smbd_max_frmr_depth_proc_fops);
 738         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 739                 &cifs_smbd_keep_alive_interval_proc_fops);
 740         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 741                 &cifs_smbd_max_receive_size_proc_fops);
 742         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 743                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 744         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 745                 &cifs_smbd_max_send_size_proc_fops);
 746         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 747                 &cifs_smbd_send_credit_target_proc_fops);
 748         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 749                 &cifs_smbd_receive_credit_max_proc_fops);
 750 #endif
 751 }
 752
 753 void
 754 cifs_proc_clean(void)
 755 {
 756         if (proc_fs_cifs == NULL)
 757                 return;
 758
 759         remove_proc_entry("DebugData", proc_fs_cifs);
 760         remove_proc_entry("open_files", proc_fs_cifs);
 761         remove_proc_entry("cifsFYI", proc_fs_cifs);
 762         remove_proc_entry("traceSMB", proc_fs_cifs);
 763         remove_proc_entry("Stats", proc_fs_cifs);
 764         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 765         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 766         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 767         remove_proc_entry("mount_params", proc_fs_cifs);
 768
 769 #ifdef CONFIG_CIFS_DFS_UPCALL
 770         remove_proc_entry("dfscache", proc_fs_cifs);
 771 #endif
 772 #ifdef CONFIG_CIFS_SMB_DIRECT
 773         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 774         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 775         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 776         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 777         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 778         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 779         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 780         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 781 #endif
 782         remove_proc_entry("fs/cifs", NULL);
 783 }
 784
 785 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 786 {
 787         seq_printf(m, "%d\n", cifsFYI);
 788         return 0;
 789 }
 790
 791 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 792 {
 793         return single_open(file, cifsFYI_proc_show, NULL);
 794 }
 795
 796 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 797                 size_t count, loff_t *ppos)
 798 {
 799         char c[2] = { '\0' };
 800         bool bv;
 801         int rc;
 802
 803         rc = get_user(c[0], buffer);
 804         if (rc)
 805                 return rc;
 806         if (strtobool(c, &bv) == 0)
 807                 cifsFYI = bv;
 808         else if ((c[0] > '1') && (c[0] <= '9'))
 809                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 810         else
 811                 return -EINVAL;
 812
 813         return count;
 814 }
 815
 816 static const struct proc_ops cifsFYI_proc_ops = {
 817         .proc_open      = cifsFYI_proc_open,
 818         .proc_read      = seq_read,
 819         .proc_lseek     = seq_lseek,
 820         .proc_release   = single_release,
 821         .proc_write     = cifsFYI_proc_write,
 822 };
 823
 824 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 825 {
 826         seq_printf(m, "%d\n", linuxExtEnabled);
 827         return 0;
 828 }
 829
 830 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 831 {
 832         return single_open(file, cifs_linux_ext_proc_show, NULL);
 833 }
 834
 835 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 836                 const char __user *buffer, size_t count, loff_t *ppos)
 837 {
 838         int rc;
 839
 840         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 841         if (rc)
 842                 return rc;
 843
 844         return count;
 845 }
 846
 847 static const struct proc_ops cifs_linux_ext_proc_ops = {
 848         .proc_open      = cifs_linux_ext_proc_open,
 849         .proc_read      = seq_read,
 850         .proc_lseek     = seq_lseek,
 851         .proc_release   = single_release,
 852         .proc_write     = cifs_linux_ext_proc_write,
 853 };
 854
 855 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 856 {
 857         seq_printf(m, "%d\n", lookupCacheEnabled);
 858         return 0;
 859 }
 860
 861 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 862 {
 863         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 864 }
 865
 866 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 867                 const char __user *buffer, size_t count, loff_t *ppos)
 868 {
 869         int rc;
 870
 871         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 872         if (rc)
 873                 return rc;
 874
 875         return count;
 876 }
 877
 878 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 879         .proc_open      = cifs_lookup_cache_proc_open,
 880         .proc_read      = seq_read,
 881         .proc_lseek     = seq_lseek,
 882         .proc_release   = single_release,
 883         .proc_write     = cifs_lookup_cache_proc_write,
 884 };
 885
 886 static int traceSMB_proc_show(struct seq_file *m, void *v)
 887 {
 888         seq_printf(m, "%d\n", traceSMB);
 889         return 0;
 890 }
 891
 892 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 893 {
 894         return single_open(file, traceSMB_proc_show, NULL);
 895 }
 896
 897 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 898                 size_t count, loff_t *ppos)
 899 {
 900         int rc;
 901
 902         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 903         if (rc)
 904                 return rc;
 905
 906         return count;
 907 }
 908
 909 static const struct proc_ops traceSMB_proc_ops = {
 910         .proc_open      = traceSMB_proc_open,
 911         .proc_read      = seq_read,
 912         .proc_lseek     = seq_lseek,
 913         .proc_release   = single_release,
 914         .proc_write     = traceSMB_proc_write,
 915 };
 916
 917 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 918 {
 919         seq_printf(m, "0x%x\n", global_secflags);
 920         return 0;
 921 }
 922
 923 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 924 {
 925         return single_open(file, cifs_security_flags_proc_show, NULL);
 926 }
 927
 928 /*
 929  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 930  * flags except for the ones corresponding to the given MUST flag. If there are
 931  * multiple MUST flags, then try to prefer more secure ones.
 932  */
 933 static void
 934 cifs_security_flags_handle_must_flags(unsigned int *flags)
 935 {
 936         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 937
 938         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 939                 *flags = CIFSSEC_MUST_KRB5;
 940         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 941                 *flags = CIFSSEC_MUST_NTLMSSP;
 942         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 943                 *flags = CIFSSEC_MUST_NTLMV2;
 944
 945         *flags |= signflags;
 946 }
 947
 948 static ssize_t cifs_security_flags_proc_write(struct file *file,
 949                 const char __user *buffer, size_t count, loff_t *ppos)
 950 {
 951         int rc;
 952         unsigned int flags;
 953         char flags_string[12];
 954         bool bv;
 955
 956         if ((count < 1) || (count > 11))
 957                 return -EINVAL;
 958
 959         memset(flags_string, 0, 12);
 960
 961         if (copy_from_user(flags_string, buffer, count))
 962                 return -EFAULT;
 963
 964         if (count < 3) {
 965                 /* single char or single char followed by null */
 966                 if (strtobool(flags_string, &bv) == 0) {
 967                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 968                         return count;
 969                 } else if (!isdigit(flags_string[0])) {
 970                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 971                                         flags_string);
 972                         return -EINVAL;
 973                 }
 974         }
 975
 976         /* else we have a number */
 977         rc = kstrtouint(flags_string, 0, &flags);
 978         if (rc) {
 979                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 980                                 flags_string);
 981                 return rc;
 982         }
 983
 984         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 985
 986         if (flags == 0)  {
 987                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 988                 return -EINVAL;
 989         }
 990
 991         if (flags & ~CIFSSEC_MASK) {
 992                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 993                          flags & ~CIFSSEC_MASK);
 994                 return -EINVAL;
 995         }
 996
 997         cifs_security_flags_handle_must_flags(&flags);
 998
 999         /* flags look ok - update the global security flags for cifs module */
1000         global_secflags = flags;
1001         if (global_secflags & CIFSSEC_MUST_SIGN) {
1002                 /* requiring signing implies signing is allowed */
1003                 global_secflags |= CIFSSEC_MAY_SIGN;
1004                 cifs_dbg(FYI, "packet signing now required\n");
1005         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1006                 cifs_dbg(FYI, "packet signing disabled\n");
1007         }
1008         /* BB should we turn on MAY flags for other MUST options? */
1009         return count;
1010 }
1011
1012 static const struct proc_ops cifs_security_flags_proc_ops = {
1013         .proc_open      = cifs_security_flags_proc_open,
1014         .proc_read      = seq_read,
1015         .proc_lseek     = seq_lseek,
1016         .proc_release   = single_release,
1017         .proc_write     = cifs_security_flags_proc_write,
1018 };
1019
1020 /* To make it easier to debug, can help to show mount params */
1021 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1022 {
1023         const struct fs_parameter_spec *p;
1024         const char *type;
1025
1026         for (p = smb3_fs_parameters; p->name; p++) {
1027                 /* cannot use switch with pointers... */
1028                 if (!p->type) {
1029                         if (p->flags == fs_param_neg_with_no)
1030                                 type = "noflag";
1031                         else
1032                                 type = "flag";
1033                 } else if (p->type == fs_param_is_bool)
1034                         type = "bool";
1035                 else if (p->type == fs_param_is_u32)
1036                         type = "u32";
1037                 else if (p->type == fs_param_is_u64)
1038                         type = "u64";
1039                 else if (p->type == fs_param_is_string)
1040                         type = "string";
1041                 else
1042                         type = "unknown";
1043
1044                 seq_printf(m, "%s:%s\n", p->name, type);
1045         }
1046
1047         return 0;
1048 }
1049
1050 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1051 {
1052         return single_open(file, cifs_mount_params_proc_show, NULL);
1053 }
1054
1055 static const struct proc_ops cifs_mount_params_proc_ops = {
1056         .proc_open      = cifs_mount_params_proc_open,
1057         .proc_read      = seq_read,
1058         .proc_lseek     = seq_lseek,
1059         .proc_release   = single_release,
1060         /* No need for write for now */
1061         /* .proc_write  = cifs_mount_params_proc_write, */
1062 };
1063
1064 #else
1065 inline void cifs_proc_init(void)
1066 {
1067 }
1068
1069 inline void cifs_proc_clean(void)
1070 {
1071 }
1072 #endif /* PROC_FS */