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         if (!iface->is_active)
 166                 seq_puts(m, "\t\t[for-cleanup]\n");
 167 }
 168
 169 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 170 {
 171         struct list_head *tmp, *tmp1, *tmp2;
 172         struct TCP_Server_Info *server;
 173         struct cifs_ses *ses;
 174         struct cifs_tcon *tcon;
 175         struct cifsFileInfo *cfile;
 176
 177         seq_puts(m, "# Version:1\n");
 178         seq_puts(m, "# Format:\n");
 179         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 180 #ifdef CONFIG_CIFS_DEBUG2
 181         seq_printf(m, " <filename> <mid>\n");
 182 #else
 183         seq_printf(m, " <filename>\n");
 184 #endif /* CIFS_DEBUG2 */
 185         spin_lock(&cifs_tcp_ses_lock);
 186         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 187                 list_for_each(tmp, &server->smb_ses_list) {
 188                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 189                         list_for_each(tmp1, &ses->tcon_list) {
 190                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 191                                 spin_lock(&tcon->open_file_lock);
 192                                 list_for_each(tmp2, &tcon->openFileList) {
 193                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 194                                                      tlist);
 195                                         seq_printf(m,
 196                                                 "0x%x 0x%llx 0x%x %d %d %d %pd",
 197                                                 tcon->tid,
 198                                                 cfile->fid.persistent_fid,
 199                                                 cfile->f_flags,
 200                                                 cfile->count,
 201                                                 cfile->pid,
 202                                                 from_kuid(&init_user_ns, cfile->uid),
 203                                                 cfile->dentry);
 204 #ifdef CONFIG_CIFS_DEBUG2
 205                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 206 #else
 207                                         seq_printf(m, "\n");
 208 #endif /* CIFS_DEBUG2 */
 209                                 }
 210                                 spin_unlock(&tcon->open_file_lock);
 211                         }
 212                 }
 213         }
 214         spin_unlock(&cifs_tcp_ses_lock);
 215         seq_putc(m, '\n');
 216         return 0;
 217 }
 218
 219 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 220 {
 221         struct list_head *tmp2, *tmp3;
 222         struct mid_q_entry *mid_entry;
 223         struct TCP_Server_Info *server;
 224         struct cifs_ses *ses;
 225         struct cifs_tcon *tcon;
 226         struct cifs_server_iface *iface;
 227         int c, i, j;
 228
 229         seq_puts(m,
 230                     "Display Internal CIFS Data Structures for Debugging\n"
 231                     "---------------------------------------------------\n");
 232         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 233         seq_printf(m, "Features:");
 234 #ifdef CONFIG_CIFS_DFS_UPCALL
 235         seq_printf(m, " DFS");
 236 #endif
 237 #ifdef CONFIG_CIFS_FSCACHE
 238         seq_printf(m, ",FSCACHE");
 239 #endif
 240 #ifdef CONFIG_CIFS_SMB_DIRECT
 241         seq_printf(m, ",SMB_DIRECT");
 242 #endif
 243 #ifdef CONFIG_CIFS_STATS2
 244         seq_printf(m, ",STATS2");
 245 #else
 246         seq_printf(m, ",STATS");
 247 #endif
 248 #ifdef CONFIG_CIFS_DEBUG2
 249         seq_printf(m, ",DEBUG2");
 250 #elif defined(CONFIG_CIFS_DEBUG)
 251         seq_printf(m, ",DEBUG");
 252 #endif
 253 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 254         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 255 #endif
 256 #ifdef CONFIG_CIFS_POSIX
 257         seq_printf(m, ",CIFS_POSIX");
 258 #endif
 259 #ifdef CONFIG_CIFS_UPCALL
 260         seq_printf(m, ",UPCALL(SPNEGO)");
 261 #endif
 262 #ifdef CONFIG_CIFS_XATTR
 263         seq_printf(m, ",XATTR");
 264 #endif
 265         seq_printf(m, ",ACL");
 266 #ifdef CONFIG_CIFS_SWN_UPCALL
 267         seq_puts(m, ",WITNESS");
 268 #endif
 269         seq_putc(m, '\n');
 270         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 271         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 272
 273         seq_printf(m, "\nServers: ");
 274
 275         c = 0;
 276         spin_lock(&cifs_tcp_ses_lock);
 277         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 278                 /* channel info will be printed as a part of sessions below */
 279                 if (CIFS_SERVER_IS_CHAN(server))
 280                         continue;
 281
 282                 c++;
 283                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 284                         c, server->conn_id);
 285
 286                 if (server->hostname)
 287                         seq_printf(m, "Hostname: %s ", server->hostname);
 288 #ifdef CONFIG_CIFS_SMB_DIRECT
 289                 if (!server->rdma)
 290                         goto skip_rdma;
 291
 292                 if (!server->smbd_conn) {
 293                         seq_printf(m, "\nSMBDirect transport not available");
 294                         goto skip_rdma;
 295                 }
 296
 297                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 298                         "transport status: %x",
 299                         server->smbd_conn->protocol,
 300                         server->smbd_conn->transport_status);
 301                 seq_printf(m, "\nConn receive_credit_max: %x "
 302                         "send_credit_target: %x max_send_size: %x",
 303                         server->smbd_conn->receive_credit_max,
 304                         server->smbd_conn->send_credit_target,
 305                         server->smbd_conn->max_send_size);
 306                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 307                         "max_fragmented_send_size: %x max_receive_size:%x",
 308                         server->smbd_conn->max_fragmented_recv_size,
 309                         server->smbd_conn->max_fragmented_send_size,
 310                         server->smbd_conn->max_receive_size);
 311                 seq_printf(m, "\nConn keep_alive_interval: %x "
 312                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 313                         server->smbd_conn->keep_alive_interval,
 314                         server->smbd_conn->max_readwrite_size,
 315                         server->smbd_conn->rdma_readwrite_threshold);
 316                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 317                         "count_put_receive_buffer: %x count_send_empty: %x",
 318                         server->smbd_conn->count_get_receive_buffer,
 319                         server->smbd_conn->count_put_receive_buffer,
 320                         server->smbd_conn->count_send_empty);
 321                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 322                         "count_enqueue_reassembly_queue: %x "
 323                         "count_dequeue_reassembly_queue: %x "
 324                         "fragment_reassembly_remaining: %x "
 325                         "reassembly_data_length: %x "
 326                         "reassembly_queue_length: %x",
 327                         server->smbd_conn->count_reassembly_queue,
 328                         server->smbd_conn->count_enqueue_reassembly_queue,
 329                         server->smbd_conn->count_dequeue_reassembly_queue,
 330                         server->smbd_conn->fragment_reassembly_remaining,
 331                         server->smbd_conn->reassembly_data_length,
 332                         server->smbd_conn->reassembly_queue_length);
 333                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 334                         "receive_credits: %x receive_credit_target: %x",
 335                         atomic_read(&server->smbd_conn->send_credits),
 336                         atomic_read(&server->smbd_conn->receive_credits),
 337                         server->smbd_conn->receive_credit_target);
 338                 seq_printf(m, "\nPending send_pending: %x ",
 339                         atomic_read(&server->smbd_conn->send_pending));
 340                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 341                         "count_empty_packet_queue: %x",
 342                         server->smbd_conn->count_receive_queue,
 343                         server->smbd_conn->count_empty_packet_queue);
 344                 seq_printf(m, "\nMR responder_resources: %x "
 345                         "max_frmr_depth: %x mr_type: %x",
 346                         server->smbd_conn->responder_resources,
 347                         server->smbd_conn->max_frmr_depth,
 348                         server->smbd_conn->mr_type);
 349                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 350                         atomic_read(&server->smbd_conn->mr_ready_count),
 351                         atomic_read(&server->smbd_conn->mr_used_count));
 352 skip_rdma:
 353 #endif
 354                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 355                         server->credits,  server->dialect);
 356                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 357                         seq_printf(m, " COMPRESS_LZNT1");
 358                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 359                         seq_printf(m, " COMPRESS_LZ77");
 360                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 361                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 362                 if (server->sign)
 363                         seq_printf(m, " signed");
 364                 if (server->posix_ext_supported)
 365                         seq_printf(m, " posix");
 366                 if (server->nosharesock)
 367                         seq_printf(m, " nosharesock");
 368
 369                 if (server->rdma)
 370                         seq_printf(m, "\nRDMA ");
 371                 seq_printf(m, "\nTCP status: %d Instance: %d"
 372                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 373                                 server->tcpStatus,
 374                                 server->reconnect_instance,
 375                                 server->srv_count,
 376                                 server->sec_mode, in_flight(server));
 377
 378                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 379                                 atomic_read(&server->in_send),
 380                                 atomic_read(&server->num_waiters));
 381
 382                 seq_printf(m, "\n\n\tSessions: ");
 383                 i = 0;
 384                 list_for_each(tmp2, &server->smb_ses_list) {
 385                         ses = list_entry(tmp2, struct cifs_ses,
 386                                          smb_ses_list);
 387                         i++;
 388                         if ((ses->serverDomain == NULL) ||
 389                                 (ses->serverOS == NULL) ||
 390                                 (ses->serverNOS == NULL)) {
 391                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 392                                         i, ses->ip_addr, ses->ses_count,
 393                                         ses->capabilities, ses->ses_status);
 394                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 395                                         seq_printf(m, "Guest ");
 396                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 397                                         seq_printf(m, "Anonymous ");
 398                         } else {
 399                                 seq_printf(m,
 400                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 401                                     "\n\tNOS: %s\tCapability: 0x%x"
 402                                         "\n\tSMB session status: %d ",
 403                                 i, ses->ip_addr, ses->serverDomain,
 404                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 405                                 ses->capabilities, ses->ses_status);
 406                         }
 407
 408                         seq_printf(m, "\n\tSecurity type: %s ",
 409                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 410
 411                         /* dump session id helpful for use with network trace */
 412                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 413                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 414                                 seq_puts(m, " encrypted");
 415                         if (ses->sign)
 416                                 seq_puts(m, " signed");
 417
 418                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 419                                    from_kuid(&init_user_ns, ses->linux_uid),
 420                                    from_kuid(&init_user_ns, ses->cred_uid));
 421
 422                         spin_lock(&ses->chan_lock);
 423                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
 424                                 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
 425                         if (CIFS_CHAN_IN_RECONNECT(ses, 0))
 426                                 seq_puts(m, "\t[RECONNECTING] ");
 427
 428                         if (ses->chan_count > 1) {
 429                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 430                                            ses->chan_count-1);
 431                                 for (j = 1; j < ses->chan_count; j++) {
 432                                         cifs_dump_channel(m, j, &ses->chans[j]);
 433                                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
 434                                                 seq_puts(m, "\tDISCONNECTED ");
 435                                         if (CIFS_CHAN_IN_RECONNECT(ses, j))
 436                                                 seq_puts(m, "\t[RECONNECTING] ");
 437                                 }
 438                         }
 439                         spin_unlock(&ses->chan_lock);
 440
 441                         seq_puts(m, "\n\n\tShares: ");
 442                         j = 0;
 443
 444                         seq_printf(m, "\n\t%d) IPC: ", j);
 445                         if (ses->tcon_ipc)
 446                                 cifs_debug_tcon(m, ses->tcon_ipc);
 447                         else
 448                                 seq_puts(m, "none\n");
 449
 450                         list_for_each(tmp3, &ses->tcon_list) {
 451                                 tcon = list_entry(tmp3, struct cifs_tcon,
 452                                                   tcon_list);
 453                                 ++j;
 454                                 seq_printf(m, "\n\t%d) ", j);
 455                                 cifs_debug_tcon(m, tcon);
 456                         }
 457
 458                         spin_lock(&ses->iface_lock);
 459                         if (ses->iface_count)
 460                                 seq_printf(m, "\n\n\tServer interfaces: %zu",
 461                                            ses->iface_count);
 462                         j = 0;
 463                         list_for_each_entry(iface, &ses->iface_list,
 464                                                  iface_head) {
 465                                 seq_printf(m, "\n\t%d)", ++j);
 466                                 cifs_dump_iface(m, iface);
 467                                 if (is_ses_using_iface(ses, iface))
 468                                         seq_puts(m, "\t\t[CONNECTED]\n");
 469                         }
 470                         spin_unlock(&ses->iface_lock);
 471                 }
 472                 if (i == 0)
 473                         seq_printf(m, "\n\t\t[NONE]");
 474
 475                 seq_puts(m, "\n\n\tMIDs: ");
 476                 spin_lock(&GlobalMid_Lock);
 477                 list_for_each(tmp3, &server->pending_mid_q) {
 478                         mid_entry = list_entry(tmp3, struct mid_q_entry,
 479                                         qhead);
 480                         seq_printf(m, "\n\tState: %d com: %d pid:"
 481                                         " %d cbdata: %p mid %llu\n",
 482                                         mid_entry->mid_state,
 483                                         le16_to_cpu(mid_entry->command),
 484                                         mid_entry->pid,
 485                                         mid_entry->callback_data,
 486                                         mid_entry->mid);
 487                 }
 488                 spin_unlock(&GlobalMid_Lock);
 489                 seq_printf(m, "\n--\n");
 490         }
 491         if (c == 0)
 492                 seq_printf(m, "\n\t[NONE]");
 493
 494         spin_unlock(&cifs_tcp_ses_lock);
 495         seq_putc(m, '\n');
 496         cifs_swn_dump(m);
 497
 498         /* BB add code to dump additional info such as TCP session info now */
 499         return 0;
 500 }
 501
 502 static ssize_t cifs_stats_proc_write(struct file *file,
 503                 const char __user *buffer, size_t count, loff_t *ppos)
 504 {
 505         bool bv;
 506         int rc;
 507         struct list_head *tmp1, *tmp2, *tmp3;
 508         struct TCP_Server_Info *server;
 509         struct cifs_ses *ses;
 510         struct cifs_tcon *tcon;
 511
 512         rc = kstrtobool_from_user(buffer, count, &bv);
 513         if (rc == 0) {
 514 #ifdef CONFIG_CIFS_STATS2
 515                 int i;
 516
 517                 atomic_set(&totBufAllocCount, 0);
 518                 atomic_set(&totSmBufAllocCount, 0);
 519 #endif /* CONFIG_CIFS_STATS2 */
 520                 atomic_set(&tcpSesReconnectCount, 0);
 521                 atomic_set(&tconInfoReconnectCount, 0);
 522
 523                 spin_lock(&GlobalMid_Lock);
 524                 GlobalMaxActiveXid = 0;
 525                 GlobalCurrentXid = 0;
 526                 spin_unlock(&GlobalMid_Lock);
 527                 spin_lock(&cifs_tcp_ses_lock);
 528                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 529                         server = list_entry(tmp1, struct TCP_Server_Info,
 530                                             tcp_ses_list);
 531                         server->max_in_flight = 0;
 532 #ifdef CONFIG_CIFS_STATS2
 533                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 534                                 atomic_set(&server->num_cmds[i], 0);
 535                                 atomic_set(&server->smb2slowcmd[i], 0);
 536                                 server->time_per_cmd[i] = 0;
 537                                 server->slowest_cmd[i] = 0;
 538                                 server->fastest_cmd[0] = 0;
 539                         }
 540 #endif /* CONFIG_CIFS_STATS2 */
 541                         list_for_each(tmp2, &server->smb_ses_list) {
 542                                 ses = list_entry(tmp2, struct cifs_ses,
 543                                                  smb_ses_list);
 544                                 list_for_each(tmp3, &ses->tcon_list) {
 545                                         tcon = list_entry(tmp3,
 546                                                           struct cifs_tcon,
 547                                                           tcon_list);
 548                                         atomic_set(&tcon->num_smbs_sent, 0);
 549                                         spin_lock(&tcon->stat_lock);
 550                                         tcon->bytes_read = 0;
 551                                         tcon->bytes_written = 0;
 552                                         spin_unlock(&tcon->stat_lock);
 553                                         if (server->ops->clear_stats)
 554                                                 server->ops->clear_stats(tcon);
 555                                 }
 556                         }
 557                 }
 558                 spin_unlock(&cifs_tcp_ses_lock);
 559         } else {
 560                 return rc;
 561         }
 562
 563         return count;
 564 }
 565
 566 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 567 {
 568         int i;
 569 #ifdef CONFIG_CIFS_STATS2
 570         int j;
 571 #endif /* STATS2 */
 572         struct list_head *tmp2, *tmp3;
 573         struct TCP_Server_Info *server;
 574         struct cifs_ses *ses;
 575         struct cifs_tcon *tcon;
 576
 577         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 578                         sesInfoAllocCount.counter);
 579         seq_printf(m, "Share (unique mount targets): %d\n",
 580                         tconInfoAllocCount.counter);
 581         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 582                         bufAllocCount.counter,
 583                         cifs_min_rcv + tcpSesAllocCount.counter);
 584         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 585                         smBufAllocCount.counter, cifs_min_small);
 586 #ifdef CONFIG_CIFS_STATS2
 587         seq_printf(m, "Total Large %d Small %d Allocations\n",
 588                                 atomic_read(&totBufAllocCount),
 589                                 atomic_read(&totSmBufAllocCount));
 590 #endif /* CONFIG_CIFS_STATS2 */
 591
 592         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 593         seq_printf(m,
 594                 "\n%d session %d share reconnects\n",
 595                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 596
 597         seq_printf(m,
 598                 "Total vfs operations: %d maximum at one time: %d\n",
 599                 GlobalCurrentXid, GlobalMaxActiveXid);
 600
 601         i = 0;
 602         spin_lock(&cifs_tcp_ses_lock);
 603         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 604                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 605 #ifdef CONFIG_CIFS_STATS2
 606                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 607                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 608                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 609                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 610                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 611                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 612                                 atomic_read(&server->num_cmds[j]),
 613                                 server->time_per_cmd[j],
 614                                 server->fastest_cmd[j],
 615                                 server->slowest_cmd[j]);
 616                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 617                         if (atomic_read(&server->smb2slowcmd[j]))
 618                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 619                                         atomic_read(&server->smb2slowcmd[j]),
 620                                         server->hostname, j);
 621 #endif /* STATS2 */
 622                 list_for_each(tmp2, &server->smb_ses_list) {
 623                         ses = list_entry(tmp2, struct cifs_ses,
 624                                          smb_ses_list);
 625                         list_for_each(tmp3, &ses->tcon_list) {
 626                                 tcon = list_entry(tmp3,
 627                                                   struct cifs_tcon,
 628                                                   tcon_list);
 629                                 i++;
 630                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 631                                 if (tcon->need_reconnect)
 632                                         seq_puts(m, "\tDISCONNECTED ");
 633                                 seq_printf(m, "\nSMBs: %d",
 634                                            atomic_read(&tcon->num_smbs_sent));
 635                                 if (server->ops->print_stats)
 636                                         server->ops->print_stats(m, tcon);
 637                         }
 638                 }
 639         }
 640         spin_unlock(&cifs_tcp_ses_lock);
 641
 642         seq_putc(m, '\n');
 643         return 0;
 644 }
 645
 646 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 647 {
 648         return single_open(file, cifs_stats_proc_show, NULL);
 649 }
 650
 651 static const struct proc_ops cifs_stats_proc_ops = {
 652         .proc_open      = cifs_stats_proc_open,
 653         .proc_read      = seq_read,
 654         .proc_lseek     = seq_lseek,
 655         .proc_release   = single_release,
 656         .proc_write     = cifs_stats_proc_write,
 657 };
 658
 659 #ifdef CONFIG_CIFS_SMB_DIRECT
 660 #define PROC_FILE_DEFINE(name) \
 661 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 662         size_t count, loff_t *ppos) \
 663 { \
 664         int rc; \
 665         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 666         if (rc) \
 667                 return rc; \
 668         return count; \
 669 } \
 670 static int name##_proc_show(struct seq_file *m, void *v) \
 671 { \
 672         seq_printf(m, "%d\n", name ); \
 673         return 0; \
 674 } \
 675 static int name##_open(struct inode *inode, struct file *file) \
 676 { \
 677         return single_open(file, name##_proc_show, NULL); \
 678 } \
 679 \
 680 static const struct proc_ops cifs_##name##_proc_fops = { \
 681         .proc_open      = name##_open, \
 682         .proc_read      = seq_read, \
 683         .proc_lseek     = seq_lseek, \
 684         .proc_release   = single_release, \
 685         .proc_write     = name##_write, \
 686 }
 687
 688 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 689 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 690 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 691 PROC_FILE_DEFINE(smbd_max_receive_size);
 692 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 693 PROC_FILE_DEFINE(smbd_max_send_size);
 694 PROC_FILE_DEFINE(smbd_send_credit_target);
 695 PROC_FILE_DEFINE(smbd_receive_credit_max);
 696 #endif
 697
 698 static struct proc_dir_entry *proc_fs_cifs;
 699 static const struct proc_ops cifsFYI_proc_ops;
 700 static const struct proc_ops cifs_lookup_cache_proc_ops;
 701 static const struct proc_ops traceSMB_proc_ops;
 702 static const struct proc_ops cifs_security_flags_proc_ops;
 703 static const struct proc_ops cifs_linux_ext_proc_ops;
 704 static const struct proc_ops cifs_mount_params_proc_ops;
 705
 706 void
 707 cifs_proc_init(void)
 708 {
 709         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 710         if (proc_fs_cifs == NULL)
 711                 return;
 712
 713         proc_create_single("DebugData", 0, proc_fs_cifs,
 714                         cifs_debug_data_proc_show);
 715
 716         proc_create_single("open_files", 0400, proc_fs_cifs,
 717                         cifs_debug_files_proc_show);
 718
 719         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 720         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 721         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 722         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 723                     &cifs_linux_ext_proc_ops);
 724         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 725                     &cifs_security_flags_proc_ops);
 726         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 727                     &cifs_lookup_cache_proc_ops);
 728
 729         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 730
 731 #ifdef CONFIG_CIFS_DFS_UPCALL
 732         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 733 #endif
 734
 735 #ifdef CONFIG_CIFS_SMB_DIRECT
 736         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 737                 &cifs_rdma_readwrite_threshold_proc_fops);
 738         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 739                 &cifs_smbd_max_frmr_depth_proc_fops);
 740         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 741                 &cifs_smbd_keep_alive_interval_proc_fops);
 742         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 743                 &cifs_smbd_max_receive_size_proc_fops);
 744         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 745                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 746         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 747                 &cifs_smbd_max_send_size_proc_fops);
 748         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 749                 &cifs_smbd_send_credit_target_proc_fops);
 750         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 751                 &cifs_smbd_receive_credit_max_proc_fops);
 752 #endif
 753 }
 754
 755 void
 756 cifs_proc_clean(void)
 757 {
 758         if (proc_fs_cifs == NULL)
 759                 return;
 760
 761         remove_proc_entry("DebugData", proc_fs_cifs);
 762         remove_proc_entry("open_files", proc_fs_cifs);
 763         remove_proc_entry("cifsFYI", proc_fs_cifs);
 764         remove_proc_entry("traceSMB", proc_fs_cifs);
 765         remove_proc_entry("Stats", proc_fs_cifs);
 766         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 767         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 768         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 769         remove_proc_entry("mount_params", proc_fs_cifs);
 770
 771 #ifdef CONFIG_CIFS_DFS_UPCALL
 772         remove_proc_entry("dfscache", proc_fs_cifs);
 773 #endif
 774 #ifdef CONFIG_CIFS_SMB_DIRECT
 775         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 776         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 777         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 778         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 779         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 780         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 781         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 782         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 783 #endif
 784         remove_proc_entry("fs/cifs", NULL);
 785 }
 786
 787 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 788 {
 789         seq_printf(m, "%d\n", cifsFYI);
 790         return 0;
 791 }
 792
 793 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 794 {
 795         return single_open(file, cifsFYI_proc_show, NULL);
 796 }
 797
 798 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 799                 size_t count, loff_t *ppos)
 800 {
 801         char c[2] = { '\0' };
 802         bool bv;
 803         int rc;
 804
 805         rc = get_user(c[0], buffer);
 806         if (rc)
 807                 return rc;
 808         if (strtobool(c, &bv) == 0)
 809                 cifsFYI = bv;
 810         else if ((c[0] > '1') && (c[0] <= '9'))
 811                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 812         else
 813                 return -EINVAL;
 814
 815         return count;
 816 }
 817
 818 static const struct proc_ops cifsFYI_proc_ops = {
 819         .proc_open      = cifsFYI_proc_open,
 820         .proc_read      = seq_read,
 821         .proc_lseek     = seq_lseek,
 822         .proc_release   = single_release,
 823         .proc_write     = cifsFYI_proc_write,
 824 };
 825
 826 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 827 {
 828         seq_printf(m, "%d\n", linuxExtEnabled);
 829         return 0;
 830 }
 831
 832 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 833 {
 834         return single_open(file, cifs_linux_ext_proc_show, NULL);
 835 }
 836
 837 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 838                 const char __user *buffer, size_t count, loff_t *ppos)
 839 {
 840         int rc;
 841
 842         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 843         if (rc)
 844                 return rc;
 845
 846         return count;
 847 }
 848
 849 static const struct proc_ops cifs_linux_ext_proc_ops = {
 850         .proc_open      = cifs_linux_ext_proc_open,
 851         .proc_read      = seq_read,
 852         .proc_lseek     = seq_lseek,
 853         .proc_release   = single_release,
 854         .proc_write     = cifs_linux_ext_proc_write,
 855 };
 856
 857 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 858 {
 859         seq_printf(m, "%d\n", lookupCacheEnabled);
 860         return 0;
 861 }
 862
 863 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 864 {
 865         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 866 }
 867
 868 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 869                 const char __user *buffer, size_t count, loff_t *ppos)
 870 {
 871         int rc;
 872
 873         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 874         if (rc)
 875                 return rc;
 876
 877         return count;
 878 }
 879
 880 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 881         .proc_open      = cifs_lookup_cache_proc_open,
 882         .proc_read      = seq_read,
 883         .proc_lseek     = seq_lseek,
 884         .proc_release   = single_release,
 885         .proc_write     = cifs_lookup_cache_proc_write,
 886 };
 887
 888 static int traceSMB_proc_show(struct seq_file *m, void *v)
 889 {
 890         seq_printf(m, "%d\n", traceSMB);
 891         return 0;
 892 }
 893
 894 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 895 {
 896         return single_open(file, traceSMB_proc_show, NULL);
 897 }
 898
 899 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 900                 size_t count, loff_t *ppos)
 901 {
 902         int rc;
 903
 904         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 905         if (rc)
 906                 return rc;
 907
 908         return count;
 909 }
 910
 911 static const struct proc_ops traceSMB_proc_ops = {
 912         .proc_open      = traceSMB_proc_open,
 913         .proc_read      = seq_read,
 914         .proc_lseek     = seq_lseek,
 915         .proc_release   = single_release,
 916         .proc_write     = traceSMB_proc_write,
 917 };
 918
 919 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 920 {
 921         seq_printf(m, "0x%x\n", global_secflags);
 922         return 0;
 923 }
 924
 925 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 926 {
 927         return single_open(file, cifs_security_flags_proc_show, NULL);
 928 }
 929
 930 /*
 931  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 932  * flags except for the ones corresponding to the given MUST flag. If there are
 933  * multiple MUST flags, then try to prefer more secure ones.
 934  */
 935 static void
 936 cifs_security_flags_handle_must_flags(unsigned int *flags)
 937 {
 938         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 939
 940         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 941                 *flags = CIFSSEC_MUST_KRB5;
 942         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 943                 *flags = CIFSSEC_MUST_NTLMSSP;
 944         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 945                 *flags = CIFSSEC_MUST_NTLMV2;
 946
 947         *flags |= signflags;
 948 }
 949
 950 static ssize_t cifs_security_flags_proc_write(struct file *file,
 951                 const char __user *buffer, size_t count, loff_t *ppos)
 952 {
 953         int rc;
 954         unsigned int flags;
 955         char flags_string[12];
 956         bool bv;
 957
 958         if ((count < 1) || (count > 11))
 959                 return -EINVAL;
 960
 961         memset(flags_string, 0, 12);
 962
 963         if (copy_from_user(flags_string, buffer, count))
 964                 return -EFAULT;
 965
 966         if (count < 3) {
 967                 /* single char or single char followed by null */
 968                 if (strtobool(flags_string, &bv) == 0) {
 969                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 970                         return count;
 971                 } else if (!isdigit(flags_string[0])) {
 972                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 973                                         flags_string);
 974                         return -EINVAL;
 975                 }
 976         }
 977
 978         /* else we have a number */
 979         rc = kstrtouint(flags_string, 0, &flags);
 980         if (rc) {
 981                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 982                                 flags_string);
 983                 return rc;
 984         }
 985
 986         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 987
 988         if (flags == 0)  {
 989                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 990                 return -EINVAL;
 991         }
 992
 993         if (flags & ~CIFSSEC_MASK) {
 994                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 995                          flags & ~CIFSSEC_MASK);
 996                 return -EINVAL;
 997         }
 998
 999         cifs_security_flags_handle_must_flags(&flags);
1000
1001         /* flags look ok - update the global security flags for cifs module */
1002         global_secflags = flags;
1003         if (global_secflags & CIFSSEC_MUST_SIGN) {
1004                 /* requiring signing implies signing is allowed */
1005                 global_secflags |= CIFSSEC_MAY_SIGN;
1006                 cifs_dbg(FYI, "packet signing now required\n");
1007         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1008                 cifs_dbg(FYI, "packet signing disabled\n");
1009         }
1010         /* BB should we turn on MAY flags for other MUST options? */
1011         return count;
1012 }
1013
1014 static const struct proc_ops cifs_security_flags_proc_ops = {
1015         .proc_open      = cifs_security_flags_proc_open,
1016         .proc_read      = seq_read,
1017         .proc_lseek     = seq_lseek,
1018         .proc_release   = single_release,
1019         .proc_write     = cifs_security_flags_proc_write,
1020 };
1021
1022 /* To make it easier to debug, can help to show mount params */
1023 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1024 {
1025         const struct fs_parameter_spec *p;
1026         const char *type;
1027
1028         for (p = smb3_fs_parameters; p->name; p++) {
1029                 /* cannot use switch with pointers... */
1030                 if (!p->type) {
1031                         if (p->flags == fs_param_neg_with_no)
1032                                 type = "noflag";
1033                         else
1034                                 type = "flag";
1035                 } else if (p->type == fs_param_is_bool)
1036                         type = "bool";
1037                 else if (p->type == fs_param_is_u32)
1038                         type = "u32";
1039                 else if (p->type == fs_param_is_u64)
1040                         type = "u64";
1041                 else if (p->type == fs_param_is_string)
1042                         type = "string";
1043                 else
1044                         type = "unknown";
1045
1046                 seq_printf(m, "%s:%s\n", p->name, type);
1047         }
1048
1049         return 0;
1050 }
1051
1052 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1053 {
1054         return single_open(file, cifs_mount_params_proc_show, NULL);
1055 }
1056
1057 static const struct proc_ops cifs_mount_params_proc_ops = {
1058         .proc_open      = cifs_mount_params_proc_open,
1059         .proc_read      = seq_read,
1060         .proc_lseek     = seq_lseek,
1061         .proc_release   = single_release,
1062         /* No need for write for now */
1063         /* .proc_write  = cifs_mount_params_proc_write, */
1064 };
1065
1066 #else
1067 inline void cifs_proc_init(void)
1068 {
1069 }
1070
1071 inline void cifs_proc_clean(void)
1072 {
1073 }
1074 #endif /* PROC_FS */