fs/cifs/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   fs/cifs_debug.c
   4  *
   5  *   Copyright (C) International Business Machines  Corp., 2000,2005
   6  *
   7  *   Modified by Steve French (sfrench@us.ibm.com)
   8  */
   9 #include <linux/fs.h>
  10 #include <linux/string.h>
  11 #include <linux/ctype.h>
  12 #include <linux/module.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/uaccess.h>
  15 #include "cifspdu.h"
  16 #include "cifsglob.h"
  17 #include "cifsproto.h"
  18 #include "cifs_debug.h"
  19 #include "cifsfs.h"
  20 #ifdef CONFIG_CIFS_DFS_UPCALL
  21 #include "dfs_cache.h"
  22 #endif
  23 #ifdef CONFIG_CIFS_SMB_DIRECT
  24 #include "smbdirect.h"
  25 #endif
  26 #ifdef CONFIG_CIFS_SWN_UPCALL
  27 #include "cifs_swn.h"
  28 #endif
  29
  30 void
  31 cifs_dump_mem(char *label, void *data, int length)
  32 {
  33         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  34         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  35                        data, length, true);
  36 }
  37
  38 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  39 {
  40 #ifdef CONFIG_CIFS_DEBUG2
  41         struct smb_hdr *smb = (struct smb_hdr *)buf;
  42
  43         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  44                  smb->Command, smb->Status.CifsError,
  45                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  46         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  47                  server->ops->calc_smb_size(smb, server));
  48 #endif /* CONFIG_CIFS_DEBUG2 */
  49 }
  50
  51 void cifs_dump_mids(struct TCP_Server_Info *server)
  52 {
  53 #ifdef CONFIG_CIFS_DEBUG2
  54         struct list_head *tmp;
  55         struct mid_q_entry *mid_entry;
  56
  57         if (server == NULL)
  58                 return;
  59
  60         cifs_dbg(VFS, "Dump pending requests:\n");
  61         spin_lock(&GlobalMid_Lock);
  62         list_for_each(tmp, &server->pending_mid_q) {
  63                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  64                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  65                          mid_entry->mid_state,
  66                          le16_to_cpu(mid_entry->command),
  67                          mid_entry->pid,
  68                          mid_entry->callback_data,
  69                          mid_entry->mid);
  70 #ifdef CONFIG_CIFS_STATS2
  71                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  72                          mid_entry->large_buf,
  73                          mid_entry->resp_buf,
  74                          mid_entry->when_received,
  75                          jiffies);
  76 #endif /* STATS2 */
  77                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  78                          mid_entry->multiRsp, mid_entry->multiEnd);
  79                 if (mid_entry->resp_buf) {
  80                         cifs_dump_detail(mid_entry->resp_buf, server);
  81                         cifs_dump_mem("existing buf: ",
  82                                 mid_entry->resp_buf, 62);
  83                 }
  84         }
  85         spin_unlock(&GlobalMid_Lock);
  86 #endif /* CONFIG_CIFS_DEBUG2 */
  87 }
  88
  89 #ifdef CONFIG_PROC_FS
  90 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  91 {
  92         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  93
  94         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
  95         if (tcon->nativeFileSystem)
  96                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  97         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  98                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  99                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 100                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 101                    tcon->tidStatus);
 102         if (dev_type == FILE_DEVICE_DISK)
 103                 seq_puts(m, " type: DISK ");
 104         else if (dev_type == FILE_DEVICE_CD_ROM)
 105                 seq_puts(m, " type: CDROM ");
 106         else
 107                 seq_printf(m, " type: %d ", dev_type);
 108
 109         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 110
 111         if ((tcon->seal) ||
 112             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 113             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 114                 seq_printf(m, " Encrypted");
 115         if (tcon->nocase)
 116                 seq_printf(m, " nocase");
 117         if (tcon->unix_ext)
 118                 seq_printf(m, " POSIX Extensions");
 119         if (tcon->ses->server->ops->dump_share_caps)
 120                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 121 #ifdef CONFIG_CIFS_SWN_UPCALL
 122         if (tcon->use_witness)
 123                 seq_puts(m, " Witness");
 124 #endif
 125
 126         if (tcon->need_reconnect)
 127                 seq_puts(m, "\tDISCONNECTED ");
 128         seq_putc(m, '\n');
 129 }
 130
 131 static void
 132 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 133 {
 134         struct TCP_Server_Info *server = chan->server;
 135
 136         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 137                    "\n\t\tNumber of credits: %d Dialect 0x%x"
 138                    "\n\t\tTCP status: %d Instance: %d"
 139                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 140                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 141                    i+1, server->conn_id,
 142                    server->credits,
 143                    server->dialect,
 144                    server->tcpStatus,
 145                    server->reconnect_instance,
 146                    server->srv_count,
 147                    server->sec_mode,
 148                    in_flight(server),
 149                    atomic_read(&server->in_send),
 150                    atomic_read(&server->num_waiters));
 151 }
 152
 153 static void
 154 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 155 {
 156         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 157         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 158
 159         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 160         seq_puts(m, "\t\tCapabilities: ");
 161         if (iface->rdma_capable)
 162                 seq_puts(m, "rdma ");
 163         if (iface->rss_capable)
 164                 seq_puts(m, "rss ");
 165         seq_putc(m, '\n');
 166         if (iface->sockaddr.ss_family == AF_INET)
 167                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 168         else if (iface->sockaddr.ss_family == AF_INET6)
 169                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 170 }
 171
 172 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 173 {
 174         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 175         struct TCP_Server_Info *server;
 176         struct cifs_ses *ses;
 177         struct cifs_tcon *tcon;
 178         struct cifsFileInfo *cfile;
 179
 180         seq_puts(m, "# Version:1\n");
 181         seq_puts(m, "# Format:\n");
 182         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 183 #ifdef CONFIG_CIFS_DEBUG2
 184         seq_printf(m, " <filename> <mid>\n");
 185 #else
 186         seq_printf(m, " <filename>\n");
 187 #endif /* CIFS_DEBUG2 */
 188         spin_lock(&cifs_tcp_ses_lock);
 189         list_for_each(stmp, &cifs_tcp_ses_list) {
 190                 server = list_entry(stmp, struct TCP_Server_Info,
 191                                     tcp_ses_list);
 192                 list_for_each(tmp, &server->smb_ses_list) {
 193                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 194                         list_for_each(tmp1, &ses->tcon_list) {
 195                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 196                                 spin_lock(&tcon->open_file_lock);
 197                                 list_for_each(tmp2, &tcon->openFileList) {
 198                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 199                                                      tlist);
 200                                         seq_printf(m,
 201                                                 "0x%x 0x%llx 0x%x %d %d %d %pd",
 202                                                 tcon->tid,
 203                                                 cfile->fid.persistent_fid,
 204                                                 cfile->f_flags,
 205                                                 cfile->count,
 206                                                 cfile->pid,
 207                                                 from_kuid(&init_user_ns, cfile->uid),
 208                                                 cfile->dentry);
 209 #ifdef CONFIG_CIFS_DEBUG2
 210                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 211 #else
 212                                         seq_printf(m, "\n");
 213 #endif /* CIFS_DEBUG2 */
 214                                 }
 215                                 spin_unlock(&tcon->open_file_lock);
 216                         }
 217                 }
 218         }
 219         spin_unlock(&cifs_tcp_ses_lock);
 220         seq_putc(m, '\n');
 221         return 0;
 222 }
 223
 224 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 225 {
 226         struct list_head *tmp1, *tmp2, *tmp3;
 227         struct mid_q_entry *mid_entry;
 228         struct TCP_Server_Info *server;
 229         struct cifs_ses *ses;
 230         struct cifs_tcon *tcon;
 231         int c, i, j;
 232
 233         seq_puts(m,
 234                     "Display Internal CIFS Data Structures for Debugging\n"
 235                     "---------------------------------------------------\n");
 236         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 237         seq_printf(m, "Features:");
 238 #ifdef CONFIG_CIFS_DFS_UPCALL
 239         seq_printf(m, " DFS");
 240 #endif
 241 #ifdef CONFIG_CIFS_FSCACHE
 242         seq_printf(m, ",FSCACHE");
 243 #endif
 244 #ifdef CONFIG_CIFS_SMB_DIRECT
 245         seq_printf(m, ",SMB_DIRECT");
 246 #endif
 247 #ifdef CONFIG_CIFS_STATS2
 248         seq_printf(m, ",STATS2");
 249 #else
 250         seq_printf(m, ",STATS");
 251 #endif
 252 #ifdef CONFIG_CIFS_DEBUG2
 253         seq_printf(m, ",DEBUG2");
 254 #elif defined(CONFIG_CIFS_DEBUG)
 255         seq_printf(m, ",DEBUG");
 256 #endif
 257 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 258         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 259 #endif
 260 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 261         seq_printf(m, ",WEAK_PW_HASH");
 262 #endif
 263 #ifdef CONFIG_CIFS_POSIX
 264         seq_printf(m, ",CIFS_POSIX");
 265 #endif
 266 #ifdef CONFIG_CIFS_UPCALL
 267         seq_printf(m, ",UPCALL(SPNEGO)");
 268 #endif
 269 #ifdef CONFIG_CIFS_XATTR
 270         seq_printf(m, ",XATTR");
 271 #endif
 272         seq_printf(m, ",ACL");
 273 #ifdef CONFIG_CIFS_SWN_UPCALL
 274         seq_puts(m, ",WITNESS");
 275 #endif
 276         seq_putc(m, '\n');
 277         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 278         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 279
 280         seq_printf(m, "\nServers: ");
 281
 282         c = 0;
 283         spin_lock(&cifs_tcp_ses_lock);
 284         list_for_each(tmp1, &cifs_tcp_ses_list) {
 285                 server = list_entry(tmp1, struct TCP_Server_Info,
 286                                     tcp_ses_list);
 287
 288                 /* channel info will be printed as a part of sessions below */
 289                 if (server->is_channel)
 290                         continue;
 291
 292                 c++;
 293                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 294                         c, server->conn_id);
 295
 296                 if (server->hostname)
 297                         seq_printf(m, "Hostname: %s ", server->hostname);
 298 #ifdef CONFIG_CIFS_SMB_DIRECT
 299                 if (!server->rdma)
 300                         goto skip_rdma;
 301
 302                 if (!server->smbd_conn) {
 303                         seq_printf(m, "\nSMBDirect transport not available");
 304                         goto skip_rdma;
 305                 }
 306
 307                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 308                         "transport status: %x",
 309                         server->smbd_conn->protocol,
 310                         server->smbd_conn->transport_status);
 311                 seq_printf(m, "\nConn receive_credit_max: %x "
 312                         "send_credit_target: %x max_send_size: %x",
 313                         server->smbd_conn->receive_credit_max,
 314                         server->smbd_conn->send_credit_target,
 315                         server->smbd_conn->max_send_size);
 316                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 317                         "max_fragmented_send_size: %x max_receive_size:%x",
 318                         server->smbd_conn->max_fragmented_recv_size,
 319                         server->smbd_conn->max_fragmented_send_size,
 320                         server->smbd_conn->max_receive_size);
 321                 seq_printf(m, "\nConn keep_alive_interval: %x "
 322                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 323                         server->smbd_conn->keep_alive_interval,
 324                         server->smbd_conn->max_readwrite_size,
 325                         server->smbd_conn->rdma_readwrite_threshold);
 326                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 327                         "count_put_receive_buffer: %x count_send_empty: %x",
 328                         server->smbd_conn->count_get_receive_buffer,
 329                         server->smbd_conn->count_put_receive_buffer,
 330                         server->smbd_conn->count_send_empty);
 331                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 332                         "count_enqueue_reassembly_queue: %x "
 333                         "count_dequeue_reassembly_queue: %x "
 334                         "fragment_reassembly_remaining: %x "
 335                         "reassembly_data_length: %x "
 336                         "reassembly_queue_length: %x",
 337                         server->smbd_conn->count_reassembly_queue,
 338                         server->smbd_conn->count_enqueue_reassembly_queue,
 339                         server->smbd_conn->count_dequeue_reassembly_queue,
 340                         server->smbd_conn->fragment_reassembly_remaining,
 341                         server->smbd_conn->reassembly_data_length,
 342                         server->smbd_conn->reassembly_queue_length);
 343                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 344                         "receive_credits: %x receive_credit_target: %x",
 345                         atomic_read(&server->smbd_conn->send_credits),
 346                         atomic_read(&server->smbd_conn->receive_credits),
 347                         server->smbd_conn->receive_credit_target);
 348                 seq_printf(m, "\nPending send_pending: %x ",
 349                         atomic_read(&server->smbd_conn->send_pending));
 350                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 351                         "count_empty_packet_queue: %x",
 352                         server->smbd_conn->count_receive_queue,
 353                         server->smbd_conn->count_empty_packet_queue);
 354                 seq_printf(m, "\nMR responder_resources: %x "
 355                         "max_frmr_depth: %x mr_type: %x",
 356                         server->smbd_conn->responder_resources,
 357                         server->smbd_conn->max_frmr_depth,
 358                         server->smbd_conn->mr_type);
 359                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 360                         atomic_read(&server->smbd_conn->mr_ready_count),
 361                         atomic_read(&server->smbd_conn->mr_used_count));
 362 skip_rdma:
 363 #endif
 364                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 365                         server->credits,  server->dialect);
 366                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 367                         seq_printf(m, " COMPRESS_LZNT1");
 368                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 369                         seq_printf(m, " COMPRESS_LZ77");
 370                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 371                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 372                 if (server->sign)
 373                         seq_printf(m, " signed");
 374                 if (server->posix_ext_supported)
 375                         seq_printf(m, " posix");
 376
 377                 if (server->rdma)
 378                         seq_printf(m, "\nRDMA ");
 379                 seq_printf(m, "\nTCP status: %d Instance: %d"
 380                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 381                                 server->tcpStatus,
 382                                 server->reconnect_instance,
 383                                 server->srv_count,
 384                                 server->sec_mode, in_flight(server));
 385
 386                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 387                                 atomic_read(&server->in_send),
 388                                 atomic_read(&server->num_waiters));
 389
 390                 seq_printf(m, "\n\n\tSessions: ");
 391                 i = 0;
 392                 list_for_each(tmp2, &server->smb_ses_list) {
 393                         ses = list_entry(tmp2, struct cifs_ses,
 394                                          smb_ses_list);
 395                         i++;
 396                         if ((ses->serverDomain == NULL) ||
 397                                 (ses->serverOS == NULL) ||
 398                                 (ses->serverNOS == NULL)) {
 399                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 400                                         i, ses->ip_addr, ses->ses_count,
 401                                         ses->capabilities, ses->status);
 402                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 403                                         seq_printf(m, "Guest ");
 404                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 405                                         seq_printf(m, "Anonymous ");
 406                         } else {
 407                                 seq_printf(m,
 408                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 409                                     "\n\tNOS: %s\tCapability: 0x%x"
 410                                         "\n\tSMB session status: %d ",
 411                                 i, ses->ip_addr, ses->serverDomain,
 412                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 413                                 ses->capabilities, ses->status);
 414                         }
 415
 416                         seq_printf(m, "\n\tSecurity type: %s ",
 417                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 418
 419                         /* dump session id helpful for use with network trace */
 420                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 421                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 422                                 seq_puts(m, " encrypted");
 423                         if (ses->sign)
 424                                 seq_puts(m, " signed");
 425
 426                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 427                                    from_kuid(&init_user_ns, ses->linux_uid),
 428                                    from_kuid(&init_user_ns, ses->cred_uid));
 429
 430                         if (ses->chan_count > 1) {
 431                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 432                                            ses->chan_count-1);
 433                                 for (j = 1; j < ses->chan_count; j++)
 434                                         cifs_dump_channel(m, j, &ses->chans[j]);
 435                         }
 436
 437                         seq_puts(m, "\n\n\tShares: ");
 438                         j = 0;
 439
 440                         seq_printf(m, "\n\t%d) IPC: ", j);
 441                         if (ses->tcon_ipc)
 442                                 cifs_debug_tcon(m, ses->tcon_ipc);
 443                         else
 444                                 seq_puts(m, "none\n");
 445
 446                         list_for_each(tmp3, &ses->tcon_list) {
 447                                 tcon = list_entry(tmp3, struct cifs_tcon,
 448                                                   tcon_list);
 449                                 ++j;
 450                                 seq_printf(m, "\n\t%d) ", j);
 451                                 cifs_debug_tcon(m, tcon);
 452                         }
 453
 454                         spin_lock(&ses->iface_lock);
 455                         if (ses->iface_count)
 456                                 seq_printf(m, "\n\n\tServer interfaces: %zu",
 457                                            ses->iface_count);
 458                         for (j = 0; j < ses->iface_count; j++) {
 459                                 struct cifs_server_iface *iface;
 460
 461                                 iface = &ses->iface_list[j];
 462                                 seq_printf(m, "\n\t%d)", j+1);
 463                                 cifs_dump_iface(m, iface);
 464                                 if (is_ses_using_iface(ses, iface))
 465                                         seq_puts(m, "\t\t[CONNECTED]\n");
 466                         }
 467                         spin_unlock(&ses->iface_lock);
 468                 }
 469                 if (i == 0)
 470                         seq_printf(m, "\n\t\t[NONE]");
 471
 472                 seq_puts(m, "\n\n\tMIDs: ");
 473                 spin_lock(&GlobalMid_Lock);
 474                 list_for_each(tmp3, &server->pending_mid_q) {
 475                         mid_entry = list_entry(tmp3, struct mid_q_entry,
 476                                         qhead);
 477                         seq_printf(m, "\n\tState: %d com: %d pid:"
 478                                         " %d cbdata: %p mid %llu\n",
 479                                         mid_entry->mid_state,
 480                                         le16_to_cpu(mid_entry->command),
 481                                         mid_entry->pid,
 482                                         mid_entry->callback_data,
 483                                         mid_entry->mid);
 484                 }
 485                 spin_unlock(&GlobalMid_Lock);
 486                 seq_printf(m, "\n--\n");
 487         }
 488         if (c == 0)
 489                 seq_printf(m, "\n\t[NONE]");
 490
 491         spin_unlock(&cifs_tcp_ses_lock);
 492         seq_putc(m, '\n');
 493
 494 #ifdef CONFIG_CIFS_SWN_UPCALL
 495         cifs_swn_dump(m);
 496 #endif
 497         /* BB add code to dump additional info such as TCP session info now */
 498         return 0;
 499 }
 500
 501 static ssize_t cifs_stats_proc_write(struct file *file,
 502                 const char __user *buffer, size_t count, loff_t *ppos)
 503 {
 504         bool bv;
 505         int rc;
 506         struct list_head *tmp1, *tmp2, *tmp3;
 507         struct TCP_Server_Info *server;
 508         struct cifs_ses *ses;
 509         struct cifs_tcon *tcon;
 510
 511         rc = kstrtobool_from_user(buffer, count, &bv);
 512         if (rc == 0) {
 513 #ifdef CONFIG_CIFS_STATS2
 514                 int i;
 515
 516                 atomic_set(&totBufAllocCount, 0);
 517                 atomic_set(&totSmBufAllocCount, 0);
 518 #endif /* CONFIG_CIFS_STATS2 */
 519                 atomic_set(&tcpSesReconnectCount, 0);
 520                 atomic_set(&tconInfoReconnectCount, 0);
 521
 522                 spin_lock(&GlobalMid_Lock);
 523                 GlobalMaxActiveXid = 0;
 524                 GlobalCurrentXid = 0;
 525                 spin_unlock(&GlobalMid_Lock);
 526                 spin_lock(&cifs_tcp_ses_lock);
 527                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 528                         server = list_entry(tmp1, struct TCP_Server_Info,
 529                                             tcp_ses_list);
 530                         server->max_in_flight = 0;
 531 #ifdef CONFIG_CIFS_STATS2
 532                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 533                                 atomic_set(&server->num_cmds[i], 0);
 534                                 atomic_set(&server->smb2slowcmd[i], 0);
 535                                 server->time_per_cmd[i] = 0;
 536                                 server->slowest_cmd[i] = 0;
 537                                 server->fastest_cmd[0] = 0;
 538                         }
 539 #endif /* CONFIG_CIFS_STATS2 */
 540                         list_for_each(tmp2, &server->smb_ses_list) {
 541                                 ses = list_entry(tmp2, struct cifs_ses,
 542                                                  smb_ses_list);
 543                                 list_for_each(tmp3, &ses->tcon_list) {
 544                                         tcon = list_entry(tmp3,
 545                                                           struct cifs_tcon,
 546                                                           tcon_list);
 547                                         atomic_set(&tcon->num_smbs_sent, 0);
 548                                         spin_lock(&tcon->stat_lock);
 549                                         tcon->bytes_read = 0;
 550                                         tcon->bytes_written = 0;
 551                                         spin_unlock(&tcon->stat_lock);
 552                                         if (server->ops->clear_stats)
 553                                                 server->ops->clear_stats(tcon);
 554                                 }
 555                         }
 556                 }
 557                 spin_unlock(&cifs_tcp_ses_lock);
 558         } else {
 559                 return rc;
 560         }
 561
 562         return count;
 563 }
 564
 565 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 566 {
 567         int i;
 568 #ifdef CONFIG_CIFS_STATS2
 569         int j;
 570 #endif /* STATS2 */
 571         struct list_head *tmp1, *tmp2, *tmp3;
 572         struct TCP_Server_Info *server;
 573         struct cifs_ses *ses;
 574         struct cifs_tcon *tcon;
 575
 576         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 577                         sesInfoAllocCount.counter);
 578         seq_printf(m, "Share (unique mount targets): %d\n",
 579                         tconInfoAllocCount.counter);
 580         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 581                         bufAllocCount.counter,
 582                         cifs_min_rcv + tcpSesAllocCount.counter);
 583         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 584                         smBufAllocCount.counter, cifs_min_small);
 585 #ifdef CONFIG_CIFS_STATS2
 586         seq_printf(m, "Total Large %d Small %d Allocations\n",
 587                                 atomic_read(&totBufAllocCount),
 588                                 atomic_read(&totSmBufAllocCount));
 589 #endif /* CONFIG_CIFS_STATS2 */
 590
 591         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 592         seq_printf(m,
 593                 "\n%d session %d share reconnects\n",
 594                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 595
 596         seq_printf(m,
 597                 "Total vfs operations: %d maximum at one time: %d\n",
 598                 GlobalCurrentXid, GlobalMaxActiveXid);
 599
 600         i = 0;
 601         spin_lock(&cifs_tcp_ses_lock);
 602         list_for_each(tmp1, &cifs_tcp_ses_list) {
 603                 server = list_entry(tmp1, struct TCP_Server_Info,
 604                                     tcp_ses_list);
 605                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 606 #ifdef CONFIG_CIFS_STATS2
 607                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 608                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 609                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 610                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 611                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 612                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 613                                 atomic_read(&server->num_cmds[j]),
 614                                 server->time_per_cmd[j],
 615                                 server->fastest_cmd[j],
 616                                 server->slowest_cmd[j]);
 617                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 618                         if (atomic_read(&server->smb2slowcmd[j]))
 619                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 620                                         atomic_read(&server->smb2slowcmd[j]),
 621                                         server->hostname, j);
 622 #endif /* STATS2 */
 623                 list_for_each(tmp2, &server->smb_ses_list) {
 624                         ses = list_entry(tmp2, struct cifs_ses,
 625                                          smb_ses_list);
 626                         list_for_each(tmp3, &ses->tcon_list) {
 627                                 tcon = list_entry(tmp3,
 628                                                   struct cifs_tcon,
 629                                                   tcon_list);
 630                                 i++;
 631                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 632                                 if (tcon->need_reconnect)
 633                                         seq_puts(m, "\tDISCONNECTED ");
 634                                 seq_printf(m, "\nSMBs: %d",
 635                                            atomic_read(&tcon->num_smbs_sent));
 636                                 if (server->ops->print_stats)
 637                                         server->ops->print_stats(m, tcon);
 638                         }
 639                 }
 640         }
 641         spin_unlock(&cifs_tcp_ses_lock);
 642
 643         seq_putc(m, '\n');
 644         return 0;
 645 }
 646
 647 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 648 {
 649         return single_open(file, cifs_stats_proc_show, NULL);
 650 }
 651
 652 static const struct proc_ops cifs_stats_proc_ops = {
 653         .proc_open      = cifs_stats_proc_open,
 654         .proc_read      = seq_read,
 655         .proc_lseek     = seq_lseek,
 656         .proc_release   = single_release,
 657         .proc_write     = cifs_stats_proc_write,
 658 };
 659
 660 #ifdef CONFIG_CIFS_SMB_DIRECT
 661 #define PROC_FILE_DEFINE(name) \
 662 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 663         size_t count, loff_t *ppos) \
 664 { \
 665         int rc; \
 666         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 667         if (rc) \
 668                 return rc; \
 669         return count; \
 670 } \
 671 static int name##_proc_show(struct seq_file *m, void *v) \
 672 { \
 673         seq_printf(m, "%d\n", name ); \
 674         return 0; \
 675 } \
 676 static int name##_open(struct inode *inode, struct file *file) \
 677 { \
 678         return single_open(file, name##_proc_show, NULL); \
 679 } \
 680 \
 681 static const struct proc_ops cifs_##name##_proc_fops = { \
 682         .proc_open      = name##_open, \
 683         .proc_read      = seq_read, \
 684         .proc_lseek     = seq_lseek, \
 685         .proc_release   = single_release, \
 686         .proc_write     = name##_write, \
 687 }
 688
 689 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 690 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 691 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 692 PROC_FILE_DEFINE(smbd_max_receive_size);
 693 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 694 PROC_FILE_DEFINE(smbd_max_send_size);
 695 PROC_FILE_DEFINE(smbd_send_credit_target);
 696 PROC_FILE_DEFINE(smbd_receive_credit_max);
 697 #endif
 698
 699 static struct proc_dir_entry *proc_fs_cifs;
 700 static const struct proc_ops cifsFYI_proc_ops;
 701 static const struct proc_ops cifs_lookup_cache_proc_ops;
 702 static const struct proc_ops traceSMB_proc_ops;
 703 static const struct proc_ops cifs_security_flags_proc_ops;
 704 static const struct proc_ops cifs_linux_ext_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 #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
 768 #ifdef CONFIG_CIFS_DFS_UPCALL
 769         remove_proc_entry("dfscache", proc_fs_cifs);
 770 #endif
 771 #ifdef CONFIG_CIFS_SMB_DIRECT
 772         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 773         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 774         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 775         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 776         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 777         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 778         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 779         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 780 #endif
 781         remove_proc_entry("fs/cifs", NULL);
 782 }
 783
 784 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 785 {
 786         seq_printf(m, "%d\n", cifsFYI);
 787         return 0;
 788 }
 789
 790 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 791 {
 792         return single_open(file, cifsFYI_proc_show, NULL);
 793 }
 794
 795 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 796                 size_t count, loff_t *ppos)
 797 {
 798         char c[2] = { '\0' };
 799         bool bv;
 800         int rc;
 801
 802         rc = get_user(c[0], buffer);
 803         if (rc)
 804                 return rc;
 805         if (strtobool(c, &bv) == 0)
 806                 cifsFYI = bv;
 807         else if ((c[0] > '1') && (c[0] <= '9'))
 808                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 809         else
 810                 return -EINVAL;
 811
 812         return count;
 813 }
 814
 815 static const struct proc_ops cifsFYI_proc_ops = {
 816         .proc_open      = cifsFYI_proc_open,
 817         .proc_read      = seq_read,
 818         .proc_lseek     = seq_lseek,
 819         .proc_release   = single_release,
 820         .proc_write     = cifsFYI_proc_write,
 821 };
 822
 823 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 824 {
 825         seq_printf(m, "%d\n", linuxExtEnabled);
 826         return 0;
 827 }
 828
 829 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 830 {
 831         return single_open(file, cifs_linux_ext_proc_show, NULL);
 832 }
 833
 834 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 835                 const char __user *buffer, size_t count, loff_t *ppos)
 836 {
 837         int rc;
 838
 839         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 840         if (rc)
 841                 return rc;
 842
 843         return count;
 844 }
 845
 846 static const struct proc_ops cifs_linux_ext_proc_ops = {
 847         .proc_open      = cifs_linux_ext_proc_open,
 848         .proc_read      = seq_read,
 849         .proc_lseek     = seq_lseek,
 850         .proc_release   = single_release,
 851         .proc_write     = cifs_linux_ext_proc_write,
 852 };
 853
 854 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 855 {
 856         seq_printf(m, "%d\n", lookupCacheEnabled);
 857         return 0;
 858 }
 859
 860 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 861 {
 862         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 863 }
 864
 865 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 866                 const char __user *buffer, size_t count, loff_t *ppos)
 867 {
 868         int rc;
 869
 870         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 871         if (rc)
 872                 return rc;
 873
 874         return count;
 875 }
 876
 877 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 878         .proc_open      = cifs_lookup_cache_proc_open,
 879         .proc_read      = seq_read,
 880         .proc_lseek     = seq_lseek,
 881         .proc_release   = single_release,
 882         .proc_write     = cifs_lookup_cache_proc_write,
 883 };
 884
 885 static int traceSMB_proc_show(struct seq_file *m, void *v)
 886 {
 887         seq_printf(m, "%d\n", traceSMB);
 888         return 0;
 889 }
 890
 891 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 892 {
 893         return single_open(file, traceSMB_proc_show, NULL);
 894 }
 895
 896 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 897                 size_t count, loff_t *ppos)
 898 {
 899         int rc;
 900
 901         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 902         if (rc)
 903                 return rc;
 904
 905         return count;
 906 }
 907
 908 static const struct proc_ops traceSMB_proc_ops = {
 909         .proc_open      = traceSMB_proc_open,
 910         .proc_read      = seq_read,
 911         .proc_lseek     = seq_lseek,
 912         .proc_release   = single_release,
 913         .proc_write     = traceSMB_proc_write,
 914 };
 915
 916 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 917 {
 918         seq_printf(m, "0x%x\n", global_secflags);
 919         return 0;
 920 }
 921
 922 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 923 {
 924         return single_open(file, cifs_security_flags_proc_show, NULL);
 925 }
 926
 927 /*
 928  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 929  * flags except for the ones corresponding to the given MUST flag. If there are
 930  * multiple MUST flags, then try to prefer more secure ones.
 931  */
 932 static void
 933 cifs_security_flags_handle_must_flags(unsigned int *flags)
 934 {
 935         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 936
 937         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 938                 *flags = CIFSSEC_MUST_KRB5;
 939         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 940                 *flags = CIFSSEC_MUST_NTLMSSP;
 941         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 942                 *flags = CIFSSEC_MUST_NTLMV2;
 943         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 944                 *flags = CIFSSEC_MUST_NTLM;
 945         else if (CIFSSEC_MUST_LANMAN &&
 946                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 947                 *flags = CIFSSEC_MUST_LANMAN;
 948         else if (CIFSSEC_MUST_PLNTXT &&
 949                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 950                 *flags = CIFSSEC_MUST_PLNTXT;
 951
 952         *flags |= signflags;
 953 }
 954
 955 static ssize_t cifs_security_flags_proc_write(struct file *file,
 956                 const char __user *buffer, size_t count, loff_t *ppos)
 957 {
 958         int rc;
 959         unsigned int flags;
 960         char flags_string[12];
 961         bool bv;
 962
 963         if ((count < 1) || (count > 11))
 964                 return -EINVAL;
 965
 966         memset(flags_string, 0, 12);
 967
 968         if (copy_from_user(flags_string, buffer, count))
 969                 return -EFAULT;
 970
 971         if (count < 3) {
 972                 /* single char or single char followed by null */
 973                 if (strtobool(flags_string, &bv) == 0) {
 974                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 975                         return count;
 976                 } else if (!isdigit(flags_string[0])) {
 977                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 978                                         flags_string);
 979                         return -EINVAL;
 980                 }
 981         }
 982
 983         /* else we have a number */
 984         rc = kstrtouint(flags_string, 0, &flags);
 985         if (rc) {
 986                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 987                                 flags_string);
 988                 return rc;
 989         }
 990
 991         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 992
 993         if (flags == 0)  {
 994                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 995                 return -EINVAL;
 996         }
 997
 998         if (flags & ~CIFSSEC_MASK) {
 999                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1000                          flags & ~CIFSSEC_MASK);
1001                 return -EINVAL;
1002         }
1003
1004         cifs_security_flags_handle_must_flags(&flags);
1005
1006         /* flags look ok - update the global security flags for cifs module */
1007         global_secflags = flags;
1008         if (global_secflags & CIFSSEC_MUST_SIGN) {
1009                 /* requiring signing implies signing is allowed */
1010                 global_secflags |= CIFSSEC_MAY_SIGN;
1011                 cifs_dbg(FYI, "packet signing now required\n");
1012         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1013                 cifs_dbg(FYI, "packet signing disabled\n");
1014         }
1015         /* BB should we turn on MAY flags for other MUST options? */
1016         return count;
1017 }
1018
1019 static const struct proc_ops cifs_security_flags_proc_ops = {
1020         .proc_open      = cifs_security_flags_proc_open,
1021         .proc_read      = seq_read,
1022         .proc_lseek     = seq_lseek,
1023         .proc_release   = single_release,
1024         .proc_write     = cifs_security_flags_proc_write,
1025 };
1026 #else
1027 inline void cifs_proc_init(void)
1028 {
1029 }
1030
1031 inline void cifs_proc_clean(void)
1032 {
1033 }
1034 #endif /* PROC_FS */