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->tidStatus);
  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
 120         if (tcon->need_reconnect)
 121                 seq_puts(m, "\tDISCONNECTED ");
 122         seq_putc(m, '\n');
 123 }
 124
 125 static void
 126 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 127 {
 128         struct TCP_Server_Info *server = chan->server;
 129
 130         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 131                    "\n\t\tNumber of credits: %d Dialect 0x%x"
 132                    "\n\t\tTCP status: %d Instance: %d"
 133                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 134                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 135                    i+1, server->conn_id,
 136                    server->credits,
 137                    server->dialect,
 138                    server->tcpStatus,
 139                    server->reconnect_instance,
 140                    server->srv_count,
 141                    server->sec_mode,
 142                    in_flight(server),
 143                    atomic_read(&server->in_send),
 144                    atomic_read(&server->num_waiters));
 145 }
 146
 147 static void
 148 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 149 {
 150         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 151         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 152
 153         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 154         seq_puts(m, "\t\tCapabilities: ");
 155         if (iface->rdma_capable)
 156                 seq_puts(m, "rdma ");
 157         if (iface->rss_capable)
 158                 seq_puts(m, "rss ");
 159         seq_putc(m, '\n');
 160         if (iface->sockaddr.ss_family == AF_INET)
 161                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 162         else if (iface->sockaddr.ss_family == AF_INET6)
 163                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 164 }
 165
 166 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 167 {
 168         struct list_head *tmp, *tmp1, *tmp2;
 169         struct TCP_Server_Info *server;
 170         struct cifs_ses *ses;
 171         struct cifs_tcon *tcon;
 172         struct cifsFileInfo *cfile;
 173
 174         seq_puts(m, "# Version:1\n");
 175         seq_puts(m, "# Format:\n");
 176         seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
 177 #ifdef CONFIG_CIFS_DEBUG2
 178         seq_printf(m, " <filename> <mid>\n");
 179 #else
 180         seq_printf(m, " <filename>\n");
 181 #endif /* CIFS_DEBUG2 */
 182         spin_lock(&cifs_tcp_ses_lock);
 183         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 184                 list_for_each(tmp, &server->smb_ses_list) {
 185                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 186                         list_for_each(tmp1, &ses->tcon_list) {
 187                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 188                                 spin_lock(&tcon->open_file_lock);
 189                                 list_for_each(tmp2, &tcon->openFileList) {
 190                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 191                                                      tlist);
 192                                         seq_printf(m,
 193                                                 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
 194                                                 tcon->tid,
 195                                                 ses->Suid,
 196                                                 cfile->fid.persistent_fid,
 197                                                 cfile->f_flags,
 198                                                 cfile->count,
 199                                                 cfile->pid,
 200                                                 from_kuid(&init_user_ns, cfile->uid),
 201                                                 cfile->dentry);
 202 #ifdef CONFIG_CIFS_DEBUG2
 203                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 204 #else
 205                                         seq_printf(m, "\n");
 206 #endif /* CIFS_DEBUG2 */
 207                                 }
 208                                 spin_unlock(&tcon->open_file_lock);
 209                         }
 210                 }
 211         }
 212         spin_unlock(&cifs_tcp_ses_lock);
 213         seq_putc(m, '\n');
 214         return 0;
 215 }
 216
 217 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 218 {
 219         struct list_head *tmp2, *tmp3;
 220         struct mid_q_entry *mid_entry;
 221         struct TCP_Server_Info *server;
 222         struct cifs_ses *ses;
 223         struct cifs_tcon *tcon;
 224         int c, i, j;
 225
 226         seq_puts(m,
 227                     "Display Internal CIFS Data Structures for Debugging\n"
 228                     "---------------------------------------------------\n");
 229         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 230         seq_printf(m, "Features:");
 231 #ifdef CONFIG_CIFS_DFS_UPCALL
 232         seq_printf(m, " DFS");
 233 #endif
 234 #ifdef CONFIG_CIFS_FSCACHE
 235         seq_printf(m, ",FSCACHE");
 236 #endif
 237 #ifdef CONFIG_CIFS_SMB_DIRECT
 238         seq_printf(m, ",SMB_DIRECT");
 239 #endif
 240 #ifdef CONFIG_CIFS_STATS2
 241         seq_printf(m, ",STATS2");
 242 #else
 243         seq_printf(m, ",STATS");
 244 #endif
 245 #ifdef CONFIG_CIFS_DEBUG2
 246         seq_printf(m, ",DEBUG2");
 247 #elif defined(CONFIG_CIFS_DEBUG)
 248         seq_printf(m, ",DEBUG");
 249 #endif
 250 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 251         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 252 #endif
 253 #ifdef CONFIG_CIFS_POSIX
 254         seq_printf(m, ",CIFS_POSIX");
 255 #endif
 256 #ifdef CONFIG_CIFS_UPCALL
 257         seq_printf(m, ",UPCALL(SPNEGO)");
 258 #endif
 259 #ifdef CONFIG_CIFS_XATTR
 260         seq_printf(m, ",XATTR");
 261 #endif
 262         seq_printf(m, ",ACL");
 263 #ifdef CONFIG_CIFS_SWN_UPCALL
 264         seq_puts(m, ",WITNESS");
 265 #endif
 266         seq_putc(m, '\n');
 267         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 268         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 269
 270         seq_printf(m, "\nServers: ");
 271
 272         c = 0;
 273         spin_lock(&cifs_tcp_ses_lock);
 274         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 275                 if (server->is_channel)
 276                         continue;
 277
 278                 c++;
 279                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 280                         c, server->conn_id);
 281
 282                 if (server->hostname)
 283                         seq_printf(m, "Hostname: %s ", server->hostname);
 284 #ifdef CONFIG_CIFS_SMB_DIRECT
 285                 if (!server->rdma)
 286                         goto skip_rdma;
 287
 288                 if (!server->smbd_conn) {
 289                         seq_printf(m, "\nSMBDirect transport not available");
 290                         goto skip_rdma;
 291                 }
 292
 293                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 294                         "transport status: %x",
 295                         server->smbd_conn->protocol,
 296                         server->smbd_conn->transport_status);
 297                 seq_printf(m, "\nConn receive_credit_max: %x "
 298                         "send_credit_target: %x max_send_size: %x",
 299                         server->smbd_conn->receive_credit_max,
 300                         server->smbd_conn->send_credit_target,
 301                         server->smbd_conn->max_send_size);
 302                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 303                         "max_fragmented_send_size: %x max_receive_size:%x",
 304                         server->smbd_conn->max_fragmented_recv_size,
 305                         server->smbd_conn->max_fragmented_send_size,
 306                         server->smbd_conn->max_receive_size);
 307                 seq_printf(m, "\nConn keep_alive_interval: %x "
 308                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 309                         server->smbd_conn->keep_alive_interval,
 310                         server->smbd_conn->max_readwrite_size,
 311                         server->smbd_conn->rdma_readwrite_threshold);
 312                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 313                         "count_put_receive_buffer: %x count_send_empty: %x",
 314                         server->smbd_conn->count_get_receive_buffer,
 315                         server->smbd_conn->count_put_receive_buffer,
 316                         server->smbd_conn->count_send_empty);
 317                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 318                         "count_enqueue_reassembly_queue: %x "
 319                         "count_dequeue_reassembly_queue: %x "
 320                         "fragment_reassembly_remaining: %x "
 321                         "reassembly_data_length: %x "
 322                         "reassembly_queue_length: %x",
 323                         server->smbd_conn->count_reassembly_queue,
 324                         server->smbd_conn->count_enqueue_reassembly_queue,
 325                         server->smbd_conn->count_dequeue_reassembly_queue,
 326                         server->smbd_conn->fragment_reassembly_remaining,
 327                         server->smbd_conn->reassembly_data_length,
 328                         server->smbd_conn->reassembly_queue_length);
 329                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 330                         "receive_credits: %x receive_credit_target: %x",
 331                         atomic_read(&server->smbd_conn->send_credits),
 332                         atomic_read(&server->smbd_conn->receive_credits),
 333                         server->smbd_conn->receive_credit_target);
 334                 seq_printf(m, "\nPending send_pending: %x ",
 335                         atomic_read(&server->smbd_conn->send_pending));
 336                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 337                         "count_empty_packet_queue: %x",
 338                         server->smbd_conn->count_receive_queue,
 339                         server->smbd_conn->count_empty_packet_queue);
 340                 seq_printf(m, "\nMR responder_resources: %x "
 341                         "max_frmr_depth: %x mr_type: %x",
 342                         server->smbd_conn->responder_resources,
 343                         server->smbd_conn->max_frmr_depth,
 344                         server->smbd_conn->mr_type);
 345                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 346                         atomic_read(&server->smbd_conn->mr_ready_count),
 347                         atomic_read(&server->smbd_conn->mr_used_count));
 348 skip_rdma:
 349 #endif
 350                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 351                         server->credits,  server->dialect);
 352                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 353                         seq_printf(m, " COMPRESS_LZNT1");
 354                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 355                         seq_printf(m, " COMPRESS_LZ77");
 356                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 357                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 358                 if (server->sign)
 359                         seq_printf(m, " signed");
 360                 if (server->posix_ext_supported)
 361                         seq_printf(m, " posix");
 362                 if (server->nosharesock)
 363                         seq_printf(m, " nosharesock");
 364
 365                 if (server->rdma)
 366                         seq_printf(m, "\nRDMA ");
 367                 seq_printf(m, "\nTCP status: %d Instance: %d"
 368                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 369                                 server->tcpStatus,
 370                                 server->reconnect_instance,
 371                                 server->srv_count,
 372                                 server->sec_mode, in_flight(server));
 373
 374                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 375                                 atomic_read(&server->in_send),
 376                                 atomic_read(&server->num_waiters));
 377
 378                 seq_printf(m, "\n\n\tSessions: ");
 379                 i = 0;
 380                 list_for_each(tmp2, &server->smb_ses_list) {
 381                         ses = list_entry(tmp2, struct cifs_ses,
 382                                          smb_ses_list);
 383                         i++;
 384                         if ((ses->serverDomain == NULL) ||
 385                                 (ses->serverOS == NULL) ||
 386                                 (ses->serverNOS == NULL)) {
 387                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 388                                         i, ses->ip_addr, ses->ses_count,
 389                                         ses->capabilities, ses->status);
 390                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 391                                         seq_printf(m, "Guest ");
 392                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 393                                         seq_printf(m, "Anonymous ");
 394                         } else {
 395                                 seq_printf(m,
 396                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 397                                     "\n\tNOS: %s\tCapability: 0x%x"
 398                                         "\n\tSMB session status: %d ",
 399                                 i, ses->ip_addr, ses->serverDomain,
 400                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 401                                 ses->capabilities, ses->status);
 402                         }
 403
 404                         seq_printf(m, "\n\tSecurity type: %s ",
 405                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 406
 407                         /* dump session id helpful for use with network trace */
 408                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 409                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 410                                 seq_puts(m, " encrypted");
 411                         if (ses->sign)
 412                                 seq_puts(m, " signed");
 413
 414                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 415                                    from_kuid(&init_user_ns, ses->linux_uid),
 416                                    from_kuid(&init_user_ns, ses->cred_uid));
 417
 418                         spin_lock(&ses->chan_lock);
 419                         if (ses->chan_count > 1) {
 420                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 421                                            ses->chan_count-1);
 422                                 for (j = 1; j < ses->chan_count; j++)
 423                                         cifs_dump_channel(m, j, &ses->chans[j]);
 424                         }
 425                         spin_unlock(&ses->chan_lock);
 426
 427                         seq_puts(m, "\n\n\tShares: ");
 428                         j = 0;
 429
 430                         seq_printf(m, "\n\t%d) IPC: ", j);
 431                         if (ses->tcon_ipc)
 432                                 cifs_debug_tcon(m, ses->tcon_ipc);
 433                         else
 434                                 seq_puts(m, "none\n");
 435
 436                         list_for_each(tmp3, &ses->tcon_list) {
 437                                 tcon = list_entry(tmp3, struct cifs_tcon,
 438                                                   tcon_list);
 439                                 ++j;
 440                                 seq_printf(m, "\n\t%d) ", j);
 441                                 cifs_debug_tcon(m, tcon);
 442                         }
 443
 444                         spin_lock(&ses->iface_lock);
 445                         if (ses->iface_count)
 446                                 seq_printf(m, "\n\n\tServer interfaces: %zu",
 447                                            ses->iface_count);
 448                         for (j = 0; j < ses->iface_count; j++) {
 449                                 struct cifs_server_iface *iface;
 450
 451                                 iface = &ses->iface_list[j];
 452                                 seq_printf(m, "\n\t%d)", j+1);
 453                                 cifs_dump_iface(m, iface);
 454                                 if (is_ses_using_iface(ses, iface))
 455                                         seq_puts(m, "\t\t[CONNECTED]\n");
 456                         }
 457                         spin_unlock(&ses->iface_lock);
 458                 }
 459                 if (i == 0)
 460                         seq_printf(m, "\n\t\t[NONE]");
 461
 462                 seq_puts(m, "\n\n\tMIDs: ");
 463                 spin_lock(&GlobalMid_Lock);
 464                 list_for_each(tmp3, &server->pending_mid_q) {
 465                         mid_entry = list_entry(tmp3, struct mid_q_entry,
 466                                         qhead);
 467                         seq_printf(m, "\n\tState: %d com: %d pid:"
 468                                         " %d cbdata: %p mid %llu\n",
 469                                         mid_entry->mid_state,
 470                                         le16_to_cpu(mid_entry->command),
 471                                         mid_entry->pid,
 472                                         mid_entry->callback_data,
 473                                         mid_entry->mid);
 474                 }
 475                 spin_unlock(&GlobalMid_Lock);
 476                 seq_printf(m, "\n--\n");
 477         }
 478         if (c == 0)
 479                 seq_printf(m, "\n\t[NONE]");
 480
 481         spin_unlock(&cifs_tcp_ses_lock);
 482         seq_putc(m, '\n');
 483         cifs_swn_dump(m);
 484
 485         /* BB add code to dump additional info such as TCP session info now */
 486         return 0;
 487 }
 488
 489 static ssize_t cifs_stats_proc_write(struct file *file,
 490                 const char __user *buffer, size_t count, loff_t *ppos)
 491 {
 492         bool bv;
 493         int rc;
 494         struct list_head *tmp1, *tmp2, *tmp3;
 495         struct TCP_Server_Info *server;
 496         struct cifs_ses *ses;
 497         struct cifs_tcon *tcon;
 498
 499         rc = kstrtobool_from_user(buffer, count, &bv);
 500         if (rc == 0) {
 501 #ifdef CONFIG_CIFS_STATS2
 502                 int i;
 503
 504                 atomic_set(&totBufAllocCount, 0);
 505                 atomic_set(&totSmBufAllocCount, 0);
 506 #endif /* CONFIG_CIFS_STATS2 */
 507                 atomic_set(&tcpSesReconnectCount, 0);
 508                 atomic_set(&tconInfoReconnectCount, 0);
 509
 510                 spin_lock(&GlobalMid_Lock);
 511                 GlobalMaxActiveXid = 0;
 512                 GlobalCurrentXid = 0;
 513                 spin_unlock(&GlobalMid_Lock);
 514                 spin_lock(&cifs_tcp_ses_lock);
 515                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 516                         server = list_entry(tmp1, struct TCP_Server_Info,
 517                                             tcp_ses_list);
 518                         server->max_in_flight = 0;
 519 #ifdef CONFIG_CIFS_STATS2
 520                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 521                                 atomic_set(&server->num_cmds[i], 0);
 522                                 atomic_set(&server->smb2slowcmd[i], 0);
 523                                 server->time_per_cmd[i] = 0;
 524                                 server->slowest_cmd[i] = 0;
 525                                 server->fastest_cmd[0] = 0;
 526                         }
 527 #endif /* CONFIG_CIFS_STATS2 */
 528                         list_for_each(tmp2, &server->smb_ses_list) {
 529                                 ses = list_entry(tmp2, struct cifs_ses,
 530                                                  smb_ses_list);
 531                                 list_for_each(tmp3, &ses->tcon_list) {
 532                                         tcon = list_entry(tmp3,
 533                                                           struct cifs_tcon,
 534                                                           tcon_list);
 535                                         atomic_set(&tcon->num_smbs_sent, 0);
 536                                         spin_lock(&tcon->stat_lock);
 537                                         tcon->bytes_read = 0;
 538                                         tcon->bytes_written = 0;
 539                                         spin_unlock(&tcon->stat_lock);
 540                                         if (server->ops->clear_stats)
 541                                                 server->ops->clear_stats(tcon);
 542                                 }
 543                         }
 544                 }
 545                 spin_unlock(&cifs_tcp_ses_lock);
 546         } else {
 547                 return rc;
 548         }
 549
 550         return count;
 551 }
 552
 553 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 554 {
 555         int i;
 556 #ifdef CONFIG_CIFS_STATS2
 557         int j;
 558 #endif /* STATS2 */
 559         struct list_head *tmp2, *tmp3;
 560         struct TCP_Server_Info *server;
 561         struct cifs_ses *ses;
 562         struct cifs_tcon *tcon;
 563
 564         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 565                         sesInfoAllocCount.counter);
 566         seq_printf(m, "Share (unique mount targets): %d\n",
 567                         tconInfoAllocCount.counter);
 568         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 569                         bufAllocCount.counter,
 570                         cifs_min_rcv + tcpSesAllocCount.counter);
 571         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 572                         smBufAllocCount.counter, cifs_min_small);
 573 #ifdef CONFIG_CIFS_STATS2
 574         seq_printf(m, "Total Large %d Small %d Allocations\n",
 575                                 atomic_read(&totBufAllocCount),
 576                                 atomic_read(&totSmBufAllocCount));
 577 #endif /* CONFIG_CIFS_STATS2 */
 578
 579         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 580         seq_printf(m,
 581                 "\n%d session %d share reconnects\n",
 582                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 583
 584         seq_printf(m,
 585                 "Total vfs operations: %d maximum at one time: %d\n",
 586                 GlobalCurrentXid, GlobalMaxActiveXid);
 587
 588         i = 0;
 589         spin_lock(&cifs_tcp_ses_lock);
 590         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 591                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 592 #ifdef CONFIG_CIFS_STATS2
 593                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 594                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 595                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 596                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 597                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 598                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 599                                 atomic_read(&server->num_cmds[j]),
 600                                 server->time_per_cmd[j],
 601                                 server->fastest_cmd[j],
 602                                 server->slowest_cmd[j]);
 603                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 604                         if (atomic_read(&server->smb2slowcmd[j]))
 605                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 606                                         atomic_read(&server->smb2slowcmd[j]),
 607                                         server->hostname, j);
 608 #endif /* STATS2 */
 609                 list_for_each(tmp2, &server->smb_ses_list) {
 610                         ses = list_entry(tmp2, struct cifs_ses,
 611                                          smb_ses_list);
 612                         list_for_each(tmp3, &ses->tcon_list) {
 613                                 tcon = list_entry(tmp3,
 614                                                   struct cifs_tcon,
 615                                                   tcon_list);
 616                                 i++;
 617                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 618                                 if (tcon->need_reconnect)
 619                                         seq_puts(m, "\tDISCONNECTED ");
 620                                 seq_printf(m, "\nSMBs: %d",
 621                                            atomic_read(&tcon->num_smbs_sent));
 622                                 if (server->ops->print_stats)
 623                                         server->ops->print_stats(m, tcon);
 624                         }
 625                 }
 626         }
 627         spin_unlock(&cifs_tcp_ses_lock);
 628
 629         seq_putc(m, '\n');
 630         return 0;
 631 }
 632
 633 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 634 {
 635         return single_open(file, cifs_stats_proc_show, NULL);
 636 }
 637
 638 static const struct proc_ops cifs_stats_proc_ops = {
 639         .proc_open      = cifs_stats_proc_open,
 640         .proc_read      = seq_read,
 641         .proc_lseek     = seq_lseek,
 642         .proc_release   = single_release,
 643         .proc_write     = cifs_stats_proc_write,
 644 };
 645
 646 #ifdef CONFIG_CIFS_SMB_DIRECT
 647 #define PROC_FILE_DEFINE(name) \
 648 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 649         size_t count, loff_t *ppos) \
 650 { \
 651         int rc; \
 652         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 653         if (rc) \
 654                 return rc; \
 655         return count; \
 656 } \
 657 static int name##_proc_show(struct seq_file *m, void *v) \
 658 { \
 659         seq_printf(m, "%d\n", name ); \
 660         return 0; \
 661 } \
 662 static int name##_open(struct inode *inode, struct file *file) \
 663 { \
 664         return single_open(file, name##_proc_show, NULL); \
 665 } \
 666 \
 667 static const struct proc_ops cifs_##name##_proc_fops = { \
 668         .proc_open      = name##_open, \
 669         .proc_read      = seq_read, \
 670         .proc_lseek     = seq_lseek, \
 671         .proc_release   = single_release, \
 672         .proc_write     = name##_write, \
 673 }
 674
 675 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 676 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 677 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 678 PROC_FILE_DEFINE(smbd_max_receive_size);
 679 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 680 PROC_FILE_DEFINE(smbd_max_send_size);
 681 PROC_FILE_DEFINE(smbd_send_credit_target);
 682 PROC_FILE_DEFINE(smbd_receive_credit_max);
 683 #endif
 684
 685 static struct proc_dir_entry *proc_fs_cifs;
 686 static const struct proc_ops cifsFYI_proc_ops;
 687 static const struct proc_ops cifs_lookup_cache_proc_ops;
 688 static const struct proc_ops traceSMB_proc_ops;
 689 static const struct proc_ops cifs_security_flags_proc_ops;
 690 static const struct proc_ops cifs_linux_ext_proc_ops;
 691 static const struct proc_ops cifs_mount_params_proc_ops;
 692
 693 void
 694 cifs_proc_init(void)
 695 {
 696         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 697         if (proc_fs_cifs == NULL)
 698                 return;
 699
 700         proc_create_single("DebugData", 0, proc_fs_cifs,
 701                         cifs_debug_data_proc_show);
 702
 703         proc_create_single("open_files", 0400, proc_fs_cifs,
 704                         cifs_debug_files_proc_show);
 705
 706         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 707         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 708         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 709         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 710                     &cifs_linux_ext_proc_ops);
 711         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 712                     &cifs_security_flags_proc_ops);
 713         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 714                     &cifs_lookup_cache_proc_ops);
 715
 716         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 717
 718 #ifdef CONFIG_CIFS_DFS_UPCALL
 719         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 720 #endif
 721
 722 #ifdef CONFIG_CIFS_SMB_DIRECT
 723         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 724                 &cifs_rdma_readwrite_threshold_proc_fops);
 725         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 726                 &cifs_smbd_max_frmr_depth_proc_fops);
 727         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 728                 &cifs_smbd_keep_alive_interval_proc_fops);
 729         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 730                 &cifs_smbd_max_receive_size_proc_fops);
 731         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 732                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 733         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 734                 &cifs_smbd_max_send_size_proc_fops);
 735         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 736                 &cifs_smbd_send_credit_target_proc_fops);
 737         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 738                 &cifs_smbd_receive_credit_max_proc_fops);
 739 #endif
 740 }
 741
 742 void
 743 cifs_proc_clean(void)
 744 {
 745         if (proc_fs_cifs == NULL)
 746                 return;
 747
 748         remove_proc_entry("DebugData", proc_fs_cifs);
 749         remove_proc_entry("open_files", proc_fs_cifs);
 750         remove_proc_entry("cifsFYI", proc_fs_cifs);
 751         remove_proc_entry("traceSMB", proc_fs_cifs);
 752         remove_proc_entry("Stats", proc_fs_cifs);
 753         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 754         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 755         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 756         remove_proc_entry("mount_params", proc_fs_cifs);
 757
 758 #ifdef CONFIG_CIFS_DFS_UPCALL
 759         remove_proc_entry("dfscache", proc_fs_cifs);
 760 #endif
 761 #ifdef CONFIG_CIFS_SMB_DIRECT
 762         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 763         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 764         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 765         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 766         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 767         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 768         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 769         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 770 #endif
 771         remove_proc_entry("fs/cifs", NULL);
 772 }
 773
 774 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 775 {
 776         seq_printf(m, "%d\n", cifsFYI);
 777         return 0;
 778 }
 779
 780 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 781 {
 782         return single_open(file, cifsFYI_proc_show, NULL);
 783 }
 784
 785 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 786                 size_t count, loff_t *ppos)
 787 {
 788         char c[2] = { '\0' };
 789         bool bv;
 790         int rc;
 791
 792         rc = get_user(c[0], buffer);
 793         if (rc)
 794                 return rc;
 795         if (strtobool(c, &bv) == 0)
 796                 cifsFYI = bv;
 797         else if ((c[0] > '1') && (c[0] <= '9'))
 798                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 799         else
 800                 return -EINVAL;
 801
 802         return count;
 803 }
 804
 805 static const struct proc_ops cifsFYI_proc_ops = {
 806         .proc_open      = cifsFYI_proc_open,
 807         .proc_read      = seq_read,
 808         .proc_lseek     = seq_lseek,
 809         .proc_release   = single_release,
 810         .proc_write     = cifsFYI_proc_write,
 811 };
 812
 813 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 814 {
 815         seq_printf(m, "%d\n", linuxExtEnabled);
 816         return 0;
 817 }
 818
 819 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 820 {
 821         return single_open(file, cifs_linux_ext_proc_show, NULL);
 822 }
 823
 824 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 825                 const char __user *buffer, size_t count, loff_t *ppos)
 826 {
 827         int rc;
 828
 829         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 830         if (rc)
 831                 return rc;
 832
 833         return count;
 834 }
 835
 836 static const struct proc_ops cifs_linux_ext_proc_ops = {
 837         .proc_open      = cifs_linux_ext_proc_open,
 838         .proc_read      = seq_read,
 839         .proc_lseek     = seq_lseek,
 840         .proc_release   = single_release,
 841         .proc_write     = cifs_linux_ext_proc_write,
 842 };
 843
 844 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 845 {
 846         seq_printf(m, "%d\n", lookupCacheEnabled);
 847         return 0;
 848 }
 849
 850 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 851 {
 852         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 853 }
 854
 855 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 856                 const char __user *buffer, size_t count, loff_t *ppos)
 857 {
 858         int rc;
 859
 860         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 861         if (rc)
 862                 return rc;
 863
 864         return count;
 865 }
 866
 867 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 868         .proc_open      = cifs_lookup_cache_proc_open,
 869         .proc_read      = seq_read,
 870         .proc_lseek     = seq_lseek,
 871         .proc_release   = single_release,
 872         .proc_write     = cifs_lookup_cache_proc_write,
 873 };
 874
 875 static int traceSMB_proc_show(struct seq_file *m, void *v)
 876 {
 877         seq_printf(m, "%d\n", traceSMB);
 878         return 0;
 879 }
 880
 881 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 882 {
 883         return single_open(file, traceSMB_proc_show, NULL);
 884 }
 885
 886 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 887                 size_t count, loff_t *ppos)
 888 {
 889         int rc;
 890
 891         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 892         if (rc)
 893                 return rc;
 894
 895         return count;
 896 }
 897
 898 static const struct proc_ops traceSMB_proc_ops = {
 899         .proc_open      = traceSMB_proc_open,
 900         .proc_read      = seq_read,
 901         .proc_lseek     = seq_lseek,
 902         .proc_release   = single_release,
 903         .proc_write     = traceSMB_proc_write,
 904 };
 905
 906 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 907 {
 908         seq_printf(m, "0x%x\n", global_secflags);
 909         return 0;
 910 }
 911
 912 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 913 {
 914         return single_open(file, cifs_security_flags_proc_show, NULL);
 915 }
 916
 917 /*
 918  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 919  * flags except for the ones corresponding to the given MUST flag. If there are
 920  * multiple MUST flags, then try to prefer more secure ones.
 921  */
 922 static void
 923 cifs_security_flags_handle_must_flags(unsigned int *flags)
 924 {
 925         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 926
 927         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 928                 *flags = CIFSSEC_MUST_KRB5;
 929         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 930                 *flags = CIFSSEC_MUST_NTLMSSP;
 931         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 932                 *flags = CIFSSEC_MUST_NTLMV2;
 933
 934         *flags |= signflags;
 935 }
 936
 937 static ssize_t cifs_security_flags_proc_write(struct file *file,
 938                 const char __user *buffer, size_t count, loff_t *ppos)
 939 {
 940         int rc;
 941         unsigned int flags;
 942         char flags_string[12];
 943         bool bv;
 944
 945         if ((count < 1) || (count > 11))
 946                 return -EINVAL;
 947
 948         memset(flags_string, 0, 12);
 949
 950         if (copy_from_user(flags_string, buffer, count))
 951                 return -EFAULT;
 952
 953         if (count < 3) {
 954                 /* single char or single char followed by null */
 955                 if (strtobool(flags_string, &bv) == 0) {
 956                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 957                         return count;
 958                 } else if (!isdigit(flags_string[0])) {
 959                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 960                                         flags_string);
 961                         return -EINVAL;
 962                 }
 963         }
 964
 965         /* else we have a number */
 966         rc = kstrtouint(flags_string, 0, &flags);
 967         if (rc) {
 968                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 969                                 flags_string);
 970                 return rc;
 971         }
 972
 973         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 974
 975         if (flags == 0)  {
 976                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 977                 return -EINVAL;
 978         }
 979
 980         if (flags & ~CIFSSEC_MASK) {
 981                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 982                          flags & ~CIFSSEC_MASK);
 983                 return -EINVAL;
 984         }
 985
 986         cifs_security_flags_handle_must_flags(&flags);
 987
 988         /* flags look ok - update the global security flags for cifs module */
 989         global_secflags = flags;
 990         if (global_secflags & CIFSSEC_MUST_SIGN) {
 991                 /* requiring signing implies signing is allowed */
 992                 global_secflags |= CIFSSEC_MAY_SIGN;
 993                 cifs_dbg(FYI, "packet signing now required\n");
 994         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 995                 cifs_dbg(FYI, "packet signing disabled\n");
 996         }
 997         /* BB should we turn on MAY flags for other MUST options? */
 998         return count;
 999 }
1000
1001 static const struct proc_ops cifs_security_flags_proc_ops = {
1002         .proc_open      = cifs_security_flags_proc_open,
1003         .proc_read      = seq_read,
1004         .proc_lseek     = seq_lseek,
1005         .proc_release   = single_release,
1006         .proc_write     = cifs_security_flags_proc_write,
1007 };
1008
1009 /* To make it easier to debug, can help to show mount params */
1010 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1011 {
1012         const struct fs_parameter_spec *p;
1013         const char *type;
1014
1015         for (p = smb3_fs_parameters; p->name; p++) {
1016                 /* cannot use switch with pointers... */
1017                 if (!p->type) {
1018                         if (p->flags == fs_param_neg_with_no)
1019                                 type = "noflag";
1020                         else
1021                                 type = "flag";
1022                 } else if (p->type == fs_param_is_bool)
1023                         type = "bool";
1024                 else if (p->type == fs_param_is_u32)
1025                         type = "u32";
1026                 else if (p->type == fs_param_is_u64)
1027                         type = "u64";
1028                 else if (p->type == fs_param_is_string)
1029                         type = "string";
1030                 else
1031                         type = "unknown";
1032
1033                 seq_printf(m, "%s:%s\n", p->name, type);
1034         }
1035
1036         return 0;
1037 }
1038
1039 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1040 {
1041         return single_open(file, cifs_mount_params_proc_show, NULL);
1042 }
1043
1044 static const struct proc_ops cifs_mount_params_proc_ops = {
1045         .proc_open      = cifs_mount_params_proc_open,
1046         .proc_read      = seq_read,
1047         .proc_lseek     = seq_lseek,
1048         .proc_release   = single_release,
1049         /* No need for write for now */
1050         /* .proc_write  = cifs_mount_params_proc_write, */
1051 };
1052
1053 #else
1054 inline void cifs_proc_init(void)
1055 {
1056 }
1057
1058 inline void cifs_proc_clean(void)
1059 {
1060 }
1061 #endif /* PROC_FS */