fs/cifs/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   fs/cifs_debug.c
   4  *
   5  *   Copyright (C) International Business Machines  Corp., 2000,2005
   6  *
   7  *   Modified by Steve French (sfrench@us.ibm.com)
   8  */
   9 #include <linux/fs.h>
  10 #include <linux/string.h>
  11 #include <linux/ctype.h>
  12 #include <linux/module.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/uaccess.h>
  15 #include "cifspdu.h"
  16 #include "cifsglob.h"
  17 #include "cifsproto.h"
  18 #include "cifs_debug.h"
  19 #include "cifsfs.h"
  20 #include "fs_context.h"
  21 #ifdef CONFIG_CIFS_DFS_UPCALL
  22 #include "dfs_cache.h"
  23 #endif
  24 #ifdef CONFIG_CIFS_SMB_DIRECT
  25 #include "smbdirect.h"
  26 #endif
  27 #include "cifs_swn.h"
  28
  29 void
  30 cifs_dump_mem(char *label, void *data, int length)
  31 {
  32         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  33         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  34                        data, length, true);
  35 }
  36
  37 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  38 {
  39 #ifdef CONFIG_CIFS_DEBUG2
  40         struct smb_hdr *smb = (struct smb_hdr *)buf;
  41
  42         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  43                  smb->Command, smb->Status.CifsError,
  44                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  45         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  46                  server->ops->calc_smb_size(smb, server));
  47 #endif /* CONFIG_CIFS_DEBUG2 */
  48 }
  49
  50 void cifs_dump_mids(struct TCP_Server_Info *server)
  51 {
  52 #ifdef CONFIG_CIFS_DEBUG2
  53         struct mid_q_entry *mid_entry;
  54
  55         if (server == NULL)
  56                 return;
  57
  58         cifs_dbg(VFS, "Dump pending requests:\n");
  59         spin_lock(&GlobalMid_Lock);
  60         list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
  61                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  62                          mid_entry->mid_state,
  63                          le16_to_cpu(mid_entry->command),
  64                          mid_entry->pid,
  65                          mid_entry->callback_data,
  66                          mid_entry->mid);
  67 #ifdef CONFIG_CIFS_STATS2
  68                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  69                          mid_entry->large_buf,
  70                          mid_entry->resp_buf,
  71                          mid_entry->when_received,
  72                          jiffies);
  73 #endif /* STATS2 */
  74                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  75                          mid_entry->multiRsp, mid_entry->multiEnd);
  76                 if (mid_entry->resp_buf) {
  77                         cifs_dump_detail(mid_entry->resp_buf, server);
  78                         cifs_dump_mem("existing buf: ",
  79                                 mid_entry->resp_buf, 62);
  80                 }
  81         }
  82         spin_unlock(&GlobalMid_Lock);
  83 #endif /* CONFIG_CIFS_DEBUG2 */
  84 }
  85
  86 #ifdef CONFIG_PROC_FS
  87 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  88 {
  89         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  90
  91         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
  92         if (tcon->nativeFileSystem)
  93                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  94         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  95                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  96                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
  97                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  98                    tcon->tidStatus);
  99         if (dev_type == FILE_DEVICE_DISK)
 100                 seq_puts(m, " type: DISK ");
 101         else if (dev_type == FILE_DEVICE_CD_ROM)
 102                 seq_puts(m, " type: CDROM ");
 103         else
 104                 seq_printf(m, " type: %d ", dev_type);
 105
 106         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 107
 108         if ((tcon->seal) ||
 109             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 110             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 111                 seq_printf(m, " Encrypted");
 112         if (tcon->nocase)
 113                 seq_printf(m, " nocase");
 114         if (tcon->unix_ext)
 115                 seq_printf(m, " POSIX Extensions");
 116         if (tcon->ses->server->ops->dump_share_caps)
 117                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 118         if (tcon->use_witness)
 119                 seq_puts(m, " Witness");
 120
 121         if (tcon->need_reconnect)
 122                 seq_puts(m, "\tDISCONNECTED ");
 123         seq_putc(m, '\n');
 124 }
 125
 126 static void
 127 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
 128 {
 129         struct TCP_Server_Info *server = chan->server;
 130
 131         seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
 132                    "\n\t\tNumber of credits: %d Dialect 0x%x"
 133                    "\n\t\tTCP status: %d Instance: %d"
 134                    "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
 135                    "\n\t\tIn Send: %d In MaxReq Wait: %d",
 136                    i+1, server->conn_id,
 137                    server->credits,
 138                    server->dialect,
 139                    server->tcpStatus,
 140                    server->reconnect_instance,
 141                    server->srv_count,
 142                    server->sec_mode,
 143                    in_flight(server),
 144                    atomic_read(&server->in_send),
 145                    atomic_read(&server->num_waiters));
 146 }
 147
 148 static void
 149 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 150 {
 151         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 152         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 153
 154         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 155         seq_puts(m, "\t\tCapabilities: ");
 156         if (iface->rdma_capable)
 157                 seq_puts(m, "rdma ");
 158         if (iface->rss_capable)
 159                 seq_puts(m, "rss ");
 160         seq_putc(m, '\n');
 161         if (iface->sockaddr.ss_family == AF_INET)
 162                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 163         else if (iface->sockaddr.ss_family == AF_INET6)
 164                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 165 }
 166
 167 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 168 {
 169         struct list_head *tmp, *tmp1, *tmp2;
 170         struct TCP_Server_Info *server;
 171         struct cifs_ses *ses;
 172         struct cifs_tcon *tcon;
 173         struct cifsFileInfo *cfile;
 174
 175         seq_puts(m, "# Version:1\n");
 176         seq_puts(m, "# Format:\n");
 177         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 178 #ifdef CONFIG_CIFS_DEBUG2
 179         seq_printf(m, " <filename> <mid>\n");
 180 #else
 181         seq_printf(m, " <filename>\n");
 182 #endif /* CIFS_DEBUG2 */
 183         spin_lock(&cifs_tcp_ses_lock);
 184         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 185                 list_for_each(tmp, &server->smb_ses_list) {
 186                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 187                         list_for_each(tmp1, &ses->tcon_list) {
 188                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 189                                 spin_lock(&tcon->open_file_lock);
 190                                 list_for_each(tmp2, &tcon->openFileList) {
 191                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 192                                                      tlist);
 193                                         seq_printf(m,
 194                                                 "0x%x 0x%llx 0x%x %d %d %d %pd",
 195                                                 tcon->tid,
 196                                                 cfile->fid.persistent_fid,
 197                                                 cfile->f_flags,
 198                                                 cfile->count,
 199                                                 cfile->pid,
 200                                                 from_kuid(&init_user_ns, cfile->uid),
 201                                                 cfile->dentry);
 202 #ifdef CONFIG_CIFS_DEBUG2
 203                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 204 #else
 205                                         seq_printf(m, "\n");
 206 #endif /* CIFS_DEBUG2 */
 207                                 }
 208                                 spin_unlock(&tcon->open_file_lock);
 209                         }
 210                 }
 211         }
 212         spin_unlock(&cifs_tcp_ses_lock);
 213         seq_putc(m, '\n');
 214         return 0;
 215 }
 216
 217 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 218 {
 219         struct list_head *tmp2, *tmp3;
 220         struct mid_q_entry *mid_entry;
 221         struct TCP_Server_Info *server;
 222         struct cifs_ses *ses;
 223         struct cifs_tcon *tcon;
 224         int c, i, j;
 225
 226         seq_puts(m,
 227                     "Display Internal CIFS Data Structures for Debugging\n"
 228                     "---------------------------------------------------\n");
 229         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 230         seq_printf(m, "Features:");
 231 #ifdef CONFIG_CIFS_DFS_UPCALL
 232         seq_printf(m, " DFS");
 233 #endif
 234 #ifdef CONFIG_CIFS_FSCACHE
 235         seq_printf(m, ",FSCACHE");
 236 #endif
 237 #ifdef CONFIG_CIFS_SMB_DIRECT
 238         seq_printf(m, ",SMB_DIRECT");
 239 #endif
 240 #ifdef CONFIG_CIFS_STATS2
 241         seq_printf(m, ",STATS2");
 242 #else
 243         seq_printf(m, ",STATS");
 244 #endif
 245 #ifdef CONFIG_CIFS_DEBUG2
 246         seq_printf(m, ",DEBUG2");
 247 #elif defined(CONFIG_CIFS_DEBUG)
 248         seq_printf(m, ",DEBUG");
 249 #endif
 250 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 251         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 252 #endif
 253 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 254         seq_printf(m, ",WEAK_PW_HASH");
 255 #endif
 256 #ifdef CONFIG_CIFS_POSIX
 257         seq_printf(m, ",CIFS_POSIX");
 258 #endif
 259 #ifdef CONFIG_CIFS_UPCALL
 260         seq_printf(m, ",UPCALL(SPNEGO)");
 261 #endif
 262 #ifdef CONFIG_CIFS_XATTR
 263         seq_printf(m, ",XATTR");
 264 #endif
 265         seq_printf(m, ",ACL");
 266 #ifdef CONFIG_CIFS_SWN_UPCALL
 267         seq_puts(m, ",WITNESS");
 268 #endif
 269         seq_putc(m, '\n');
 270         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 271         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 272
 273         seq_printf(m, "\nServers: ");
 274
 275         c = 0;
 276         spin_lock(&cifs_tcp_ses_lock);
 277         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 278                 if (server->is_channel)
 279                         continue;
 280
 281                 c++;
 282                 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
 283                         c, server->conn_id);
 284
 285                 if (server->hostname)
 286                         seq_printf(m, "Hostname: %s ", server->hostname);
 287 #ifdef CONFIG_CIFS_SMB_DIRECT
 288                 if (!server->rdma)
 289                         goto skip_rdma;
 290
 291                 if (!server->smbd_conn) {
 292                         seq_printf(m, "\nSMBDirect transport not available");
 293                         goto skip_rdma;
 294                 }
 295
 296                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 297                         "transport status: %x",
 298                         server->smbd_conn->protocol,
 299                         server->smbd_conn->transport_status);
 300                 seq_printf(m, "\nConn receive_credit_max: %x "
 301                         "send_credit_target: %x max_send_size: %x",
 302                         server->smbd_conn->receive_credit_max,
 303                         server->smbd_conn->send_credit_target,
 304                         server->smbd_conn->max_send_size);
 305                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 306                         "max_fragmented_send_size: %x max_receive_size:%x",
 307                         server->smbd_conn->max_fragmented_recv_size,
 308                         server->smbd_conn->max_fragmented_send_size,
 309                         server->smbd_conn->max_receive_size);
 310                 seq_printf(m, "\nConn keep_alive_interval: %x "
 311                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 312                         server->smbd_conn->keep_alive_interval,
 313                         server->smbd_conn->max_readwrite_size,
 314                         server->smbd_conn->rdma_readwrite_threshold);
 315                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 316                         "count_put_receive_buffer: %x count_send_empty: %x",
 317                         server->smbd_conn->count_get_receive_buffer,
 318                         server->smbd_conn->count_put_receive_buffer,
 319                         server->smbd_conn->count_send_empty);
 320                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 321                         "count_enqueue_reassembly_queue: %x "
 322                         "count_dequeue_reassembly_queue: %x "
 323                         "fragment_reassembly_remaining: %x "
 324                         "reassembly_data_length: %x "
 325                         "reassembly_queue_length: %x",
 326                         server->smbd_conn->count_reassembly_queue,
 327                         server->smbd_conn->count_enqueue_reassembly_queue,
 328                         server->smbd_conn->count_dequeue_reassembly_queue,
 329                         server->smbd_conn->fragment_reassembly_remaining,
 330                         server->smbd_conn->reassembly_data_length,
 331                         server->smbd_conn->reassembly_queue_length);
 332                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 333                         "receive_credits: %x receive_credit_target: %x",
 334                         atomic_read(&server->smbd_conn->send_credits),
 335                         atomic_read(&server->smbd_conn->receive_credits),
 336                         server->smbd_conn->receive_credit_target);
 337                 seq_printf(m, "\nPending send_pending: %x ",
 338                         atomic_read(&server->smbd_conn->send_pending));
 339                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 340                         "count_empty_packet_queue: %x",
 341                         server->smbd_conn->count_receive_queue,
 342                         server->smbd_conn->count_empty_packet_queue);
 343                 seq_printf(m, "\nMR responder_resources: %x "
 344                         "max_frmr_depth: %x mr_type: %x",
 345                         server->smbd_conn->responder_resources,
 346                         server->smbd_conn->max_frmr_depth,
 347                         server->smbd_conn->mr_type);
 348                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 349                         atomic_read(&server->smbd_conn->mr_ready_count),
 350                         atomic_read(&server->smbd_conn->mr_used_count));
 351 skip_rdma:
 352 #endif
 353                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 354                         server->credits,  server->dialect);
 355                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 356                         seq_printf(m, " COMPRESS_LZNT1");
 357                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 358                         seq_printf(m, " COMPRESS_LZ77");
 359                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 360                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 361                 if (server->sign)
 362                         seq_printf(m, " signed");
 363                 if (server->posix_ext_supported)
 364                         seq_printf(m, " posix");
 365
 366                 if (server->rdma)
 367                         seq_printf(m, "\nRDMA ");
 368                 seq_printf(m, "\nTCP status: %d Instance: %d"
 369                                 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
 370                                 server->tcpStatus,
 371                                 server->reconnect_instance,
 372                                 server->srv_count,
 373                                 server->sec_mode, in_flight(server));
 374
 375                 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
 376                                 atomic_read(&server->in_send),
 377                                 atomic_read(&server->num_waiters));
 378
 379                 seq_printf(m, "\n\n\tSessions: ");
 380                 i = 0;
 381                 list_for_each(tmp2, &server->smb_ses_list) {
 382                         ses = list_entry(tmp2, struct cifs_ses,
 383                                          smb_ses_list);
 384                         i++;
 385                         if ((ses->serverDomain == NULL) ||
 386                                 (ses->serverOS == NULL) ||
 387                                 (ses->serverNOS == NULL)) {
 388                                 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 389                                         i, ses->ip_addr, ses->ses_count,
 390                                         ses->capabilities, ses->status);
 391                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 392                                         seq_printf(m, "Guest ");
 393                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 394                                         seq_printf(m, "Anonymous ");
 395                         } else {
 396                                 seq_printf(m,
 397                                     "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
 398                                     "\n\tNOS: %s\tCapability: 0x%x"
 399                                         "\n\tSMB session status: %d ",
 400                                 i, ses->ip_addr, ses->serverDomain,
 401                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 402                                 ses->capabilities, ses->status);
 403                         }
 404
 405                         seq_printf(m, "\n\tSecurity type: %s ",
 406                                 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
 407
 408                         /* dump session id helpful for use with network trace */
 409                         seq_printf(m, " SessionId: 0x%llx", ses->Suid);
 410                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 411                                 seq_puts(m, " encrypted");
 412                         if (ses->sign)
 413                                 seq_puts(m, " signed");
 414
 415                         seq_printf(m, "\n\tUser: %d Cred User: %d",
 416                                    from_kuid(&init_user_ns, ses->linux_uid),
 417                                    from_kuid(&init_user_ns, ses->cred_uid));
 418
 419                         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
 426                         seq_puts(m, "\n\n\tShares: ");
 427                         j = 0;
 428
 429                         seq_printf(m, "\n\t%d) IPC: ", j);
 430                         if (ses->tcon_ipc)
 431                                 cifs_debug_tcon(m, ses->tcon_ipc);
 432                         else
 433                                 seq_puts(m, "none\n");
 434
 435                         list_for_each(tmp3, &ses->tcon_list) {
 436                                 tcon = list_entry(tmp3, struct cifs_tcon,
 437                                                   tcon_list);
 438                                 ++j;
 439                                 seq_printf(m, "\n\t%d) ", j);
 440                                 cifs_debug_tcon(m, tcon);
 441                         }
 442
 443                         spin_lock(&ses->iface_lock);
 444                         if (ses->iface_count)
 445                                 seq_printf(m, "\n\n\tServer interfaces: %zu",
 446                                            ses->iface_count);
 447                         for (j = 0; j < ses->iface_count; j++) {
 448                                 struct cifs_server_iface *iface;
 449
 450                                 iface = &ses->iface_list[j];
 451                                 seq_printf(m, "\n\t%d)", j+1);
 452                                 cifs_dump_iface(m, iface);
 453                                 if (is_ses_using_iface(ses, iface))
 454                                         seq_puts(m, "\t\t[CONNECTED]\n");
 455                         }
 456                         spin_unlock(&ses->iface_lock);
 457                 }
 458                 if (i == 0)
 459                         seq_printf(m, "\n\t\t[NONE]");
 460
 461                 seq_puts(m, "\n\n\tMIDs: ");
 462                 spin_lock(&GlobalMid_Lock);
 463                 list_for_each(tmp3, &server->pending_mid_q) {
 464                         mid_entry = list_entry(tmp3, struct mid_q_entry,
 465                                         qhead);
 466                         seq_printf(m, "\n\tState: %d com: %d pid:"
 467                                         " %d cbdata: %p mid %llu\n",
 468                                         mid_entry->mid_state,
 469                                         le16_to_cpu(mid_entry->command),
 470                                         mid_entry->pid,
 471                                         mid_entry->callback_data,
 472                                         mid_entry->mid);
 473                 }
 474                 spin_unlock(&GlobalMid_Lock);
 475                 seq_printf(m, "\n--\n");
 476         }
 477         if (c == 0)
 478                 seq_printf(m, "\n\t[NONE]");
 479
 480         spin_unlock(&cifs_tcp_ses_lock);
 481         seq_putc(m, '\n');
 482         cifs_swn_dump(m);
 483
 484         /* BB add code to dump additional info such as TCP session info now */
 485         return 0;
 486 }
 487
 488 static ssize_t cifs_stats_proc_write(struct file *file,
 489                 const char __user *buffer, size_t count, loff_t *ppos)
 490 {
 491         bool bv;
 492         int rc;
 493         struct list_head *tmp1, *tmp2, *tmp3;
 494         struct TCP_Server_Info *server;
 495         struct cifs_ses *ses;
 496         struct cifs_tcon *tcon;
 497
 498         rc = kstrtobool_from_user(buffer, count, &bv);
 499         if (rc == 0) {
 500 #ifdef CONFIG_CIFS_STATS2
 501                 int i;
 502
 503                 atomic_set(&totBufAllocCount, 0);
 504                 atomic_set(&totSmBufAllocCount, 0);
 505 #endif /* CONFIG_CIFS_STATS2 */
 506                 atomic_set(&tcpSesReconnectCount, 0);
 507                 atomic_set(&tconInfoReconnectCount, 0);
 508
 509                 spin_lock(&GlobalMid_Lock);
 510                 GlobalMaxActiveXid = 0;
 511                 GlobalCurrentXid = 0;
 512                 spin_unlock(&GlobalMid_Lock);
 513                 spin_lock(&cifs_tcp_ses_lock);
 514                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 515                         server = list_entry(tmp1, struct TCP_Server_Info,
 516                                             tcp_ses_list);
 517                         server->max_in_flight = 0;
 518 #ifdef CONFIG_CIFS_STATS2
 519                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 520                                 atomic_set(&server->num_cmds[i], 0);
 521                                 atomic_set(&server->smb2slowcmd[i], 0);
 522                                 server->time_per_cmd[i] = 0;
 523                                 server->slowest_cmd[i] = 0;
 524                                 server->fastest_cmd[0] = 0;
 525                         }
 526 #endif /* CONFIG_CIFS_STATS2 */
 527                         list_for_each(tmp2, &server->smb_ses_list) {
 528                                 ses = list_entry(tmp2, struct cifs_ses,
 529                                                  smb_ses_list);
 530                                 list_for_each(tmp3, &ses->tcon_list) {
 531                                         tcon = list_entry(tmp3,
 532                                                           struct cifs_tcon,
 533                                                           tcon_list);
 534                                         atomic_set(&tcon->num_smbs_sent, 0);
 535                                         spin_lock(&tcon->stat_lock);
 536                                         tcon->bytes_read = 0;
 537                                         tcon->bytes_written = 0;
 538                                         spin_unlock(&tcon->stat_lock);
 539                                         if (server->ops->clear_stats)
 540                                                 server->ops->clear_stats(tcon);
 541                                 }
 542                         }
 543                 }
 544                 spin_unlock(&cifs_tcp_ses_lock);
 545         } else {
 546                 return rc;
 547         }
 548
 549         return count;
 550 }
 551
 552 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 553 {
 554         int i;
 555 #ifdef CONFIG_CIFS_STATS2
 556         int j;
 557 #endif /* STATS2 */
 558         struct list_head *tmp2, *tmp3;
 559         struct TCP_Server_Info *server;
 560         struct cifs_ses *ses;
 561         struct cifs_tcon *tcon;
 562
 563         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 564                         sesInfoAllocCount.counter);
 565         seq_printf(m, "Share (unique mount targets): %d\n",
 566                         tconInfoAllocCount.counter);
 567         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 568                         bufAllocCount.counter,
 569                         cifs_min_rcv + tcpSesAllocCount.counter);
 570         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 571                         smBufAllocCount.counter, cifs_min_small);
 572 #ifdef CONFIG_CIFS_STATS2
 573         seq_printf(m, "Total Large %d Small %d Allocations\n",
 574                                 atomic_read(&totBufAllocCount),
 575                                 atomic_read(&totSmBufAllocCount));
 576 #endif /* CONFIG_CIFS_STATS2 */
 577
 578         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 579         seq_printf(m,
 580                 "\n%d session %d share reconnects\n",
 581                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 582
 583         seq_printf(m,
 584                 "Total vfs operations: %d maximum at one time: %d\n",
 585                 GlobalCurrentXid, GlobalMaxActiveXid);
 586
 587         i = 0;
 588         spin_lock(&cifs_tcp_ses_lock);
 589         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 590                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 591 #ifdef CONFIG_CIFS_STATS2
 592                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 593                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 594                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 595                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 596                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 597                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 598                                 atomic_read(&server->num_cmds[j]),
 599                                 server->time_per_cmd[j],
 600                                 server->fastest_cmd[j],
 601                                 server->slowest_cmd[j]);
 602                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 603                         if (atomic_read(&server->smb2slowcmd[j]))
 604                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 605                                         atomic_read(&server->smb2slowcmd[j]),
 606                                         server->hostname, j);
 607 #endif /* STATS2 */
 608                 list_for_each(tmp2, &server->smb_ses_list) {
 609                         ses = list_entry(tmp2, struct cifs_ses,
 610                                          smb_ses_list);
 611                         list_for_each(tmp3, &ses->tcon_list) {
 612                                 tcon = list_entry(tmp3,
 613                                                   struct cifs_tcon,
 614                                                   tcon_list);
 615                                 i++;
 616                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 617                                 if (tcon->need_reconnect)
 618                                         seq_puts(m, "\tDISCONNECTED ");
 619                                 seq_printf(m, "\nSMBs: %d",
 620                                            atomic_read(&tcon->num_smbs_sent));
 621                                 if (server->ops->print_stats)
 622                                         server->ops->print_stats(m, tcon);
 623                         }
 624                 }
 625         }
 626         spin_unlock(&cifs_tcp_ses_lock);
 627
 628         seq_putc(m, '\n');
 629         return 0;
 630 }
 631
 632 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 633 {
 634         return single_open(file, cifs_stats_proc_show, NULL);
 635 }
 636
 637 static const struct proc_ops cifs_stats_proc_ops = {
 638         .proc_open      = cifs_stats_proc_open,
 639         .proc_read      = seq_read,
 640         .proc_lseek     = seq_lseek,
 641         .proc_release   = single_release,
 642         .proc_write     = cifs_stats_proc_write,
 643 };
 644
 645 #ifdef CONFIG_CIFS_SMB_DIRECT
 646 #define PROC_FILE_DEFINE(name) \
 647 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 648         size_t count, loff_t *ppos) \
 649 { \
 650         int rc; \
 651         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 652         if (rc) \
 653                 return rc; \
 654         return count; \
 655 } \
 656 static int name##_proc_show(struct seq_file *m, void *v) \
 657 { \
 658         seq_printf(m, "%d\n", name ); \
 659         return 0; \
 660 } \
 661 static int name##_open(struct inode *inode, struct file *file) \
 662 { \
 663         return single_open(file, name##_proc_show, NULL); \
 664 } \
 665 \
 666 static const struct proc_ops cifs_##name##_proc_fops = { \
 667         .proc_open      = name##_open, \
 668         .proc_read      = seq_read, \
 669         .proc_lseek     = seq_lseek, \
 670         .proc_release   = single_release, \
 671         .proc_write     = name##_write, \
 672 }
 673
 674 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 675 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 676 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 677 PROC_FILE_DEFINE(smbd_max_receive_size);
 678 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 679 PROC_FILE_DEFINE(smbd_max_send_size);
 680 PROC_FILE_DEFINE(smbd_send_credit_target);
 681 PROC_FILE_DEFINE(smbd_receive_credit_max);
 682 #endif
 683
 684 static struct proc_dir_entry *proc_fs_cifs;
 685 static const struct proc_ops cifsFYI_proc_ops;
 686 static const struct proc_ops cifs_lookup_cache_proc_ops;
 687 static const struct proc_ops traceSMB_proc_ops;
 688 static const struct proc_ops cifs_security_flags_proc_ops;
 689 static const struct proc_ops cifs_linux_ext_proc_ops;
 690 static const struct proc_ops cifs_mount_params_proc_ops;
 691
 692 void
 693 cifs_proc_init(void)
 694 {
 695         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 696         if (proc_fs_cifs == NULL)
 697                 return;
 698
 699         proc_create_single("DebugData", 0, proc_fs_cifs,
 700                         cifs_debug_data_proc_show);
 701
 702         proc_create_single("open_files", 0400, proc_fs_cifs,
 703                         cifs_debug_files_proc_show);
 704
 705         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 706         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 707         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 708         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 709                     &cifs_linux_ext_proc_ops);
 710         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 711                     &cifs_security_flags_proc_ops);
 712         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 713                     &cifs_lookup_cache_proc_ops);
 714
 715         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 716
 717 #ifdef CONFIG_CIFS_DFS_UPCALL
 718         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 719 #endif
 720
 721 #ifdef CONFIG_CIFS_SMB_DIRECT
 722         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 723                 &cifs_rdma_readwrite_threshold_proc_fops);
 724         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 725                 &cifs_smbd_max_frmr_depth_proc_fops);
 726         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 727                 &cifs_smbd_keep_alive_interval_proc_fops);
 728         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 729                 &cifs_smbd_max_receive_size_proc_fops);
 730         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 731                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 732         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 733                 &cifs_smbd_max_send_size_proc_fops);
 734         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 735                 &cifs_smbd_send_credit_target_proc_fops);
 736         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 737                 &cifs_smbd_receive_credit_max_proc_fops);
 738 #endif
 739 }
 740
 741 void
 742 cifs_proc_clean(void)
 743 {
 744         if (proc_fs_cifs == NULL)
 745                 return;
 746
 747         remove_proc_entry("DebugData", proc_fs_cifs);
 748         remove_proc_entry("open_files", proc_fs_cifs);
 749         remove_proc_entry("cifsFYI", proc_fs_cifs);
 750         remove_proc_entry("traceSMB", proc_fs_cifs);
 751         remove_proc_entry("Stats", proc_fs_cifs);
 752         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 753         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 754         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 755         remove_proc_entry("mount_params", proc_fs_cifs);
 756
 757 #ifdef CONFIG_CIFS_DFS_UPCALL
 758         remove_proc_entry("dfscache", proc_fs_cifs);
 759 #endif
 760 #ifdef CONFIG_CIFS_SMB_DIRECT
 761         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 762         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 763         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 764         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 765         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 766         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 767         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 768         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 769 #endif
 770         remove_proc_entry("fs/cifs", NULL);
 771 }
 772
 773 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 774 {
 775         seq_printf(m, "%d\n", cifsFYI);
 776         return 0;
 777 }
 778
 779 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 780 {
 781         return single_open(file, cifsFYI_proc_show, NULL);
 782 }
 783
 784 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 785                 size_t count, loff_t *ppos)
 786 {
 787         char c[2] = { '\0' };
 788         bool bv;
 789         int rc;
 790
 791         rc = get_user(c[0], buffer);
 792         if (rc)
 793                 return rc;
 794         if (strtobool(c, &bv) == 0)
 795                 cifsFYI = bv;
 796         else if ((c[0] > '1') && (c[0] <= '9'))
 797                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 798         else
 799                 return -EINVAL;
 800
 801         return count;
 802 }
 803
 804 static const struct proc_ops cifsFYI_proc_ops = {
 805         .proc_open      = cifsFYI_proc_open,
 806         .proc_read      = seq_read,
 807         .proc_lseek     = seq_lseek,
 808         .proc_release   = single_release,
 809         .proc_write     = cifsFYI_proc_write,
 810 };
 811
 812 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 813 {
 814         seq_printf(m, "%d\n", linuxExtEnabled);
 815         return 0;
 816 }
 817
 818 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 819 {
 820         return single_open(file, cifs_linux_ext_proc_show, NULL);
 821 }
 822
 823 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 824                 const char __user *buffer, size_t count, loff_t *ppos)
 825 {
 826         int rc;
 827
 828         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 829         if (rc)
 830                 return rc;
 831
 832         return count;
 833 }
 834
 835 static const struct proc_ops cifs_linux_ext_proc_ops = {
 836         .proc_open      = cifs_linux_ext_proc_open,
 837         .proc_read      = seq_read,
 838         .proc_lseek     = seq_lseek,
 839         .proc_release   = single_release,
 840         .proc_write     = cifs_linux_ext_proc_write,
 841 };
 842
 843 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 844 {
 845         seq_printf(m, "%d\n", lookupCacheEnabled);
 846         return 0;
 847 }
 848
 849 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 850 {
 851         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 852 }
 853
 854 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 855                 const char __user *buffer, size_t count, loff_t *ppos)
 856 {
 857         int rc;
 858
 859         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 860         if (rc)
 861                 return rc;
 862
 863         return count;
 864 }
 865
 866 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 867         .proc_open      = cifs_lookup_cache_proc_open,
 868         .proc_read      = seq_read,
 869         .proc_lseek     = seq_lseek,
 870         .proc_release   = single_release,
 871         .proc_write     = cifs_lookup_cache_proc_write,
 872 };
 873
 874 static int traceSMB_proc_show(struct seq_file *m, void *v)
 875 {
 876         seq_printf(m, "%d\n", traceSMB);
 877         return 0;
 878 }
 879
 880 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 881 {
 882         return single_open(file, traceSMB_proc_show, NULL);
 883 }
 884
 885 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 886                 size_t count, loff_t *ppos)
 887 {
 888         int rc;
 889
 890         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 891         if (rc)
 892                 return rc;
 893
 894         return count;
 895 }
 896
 897 static const struct proc_ops traceSMB_proc_ops = {
 898         .proc_open      = traceSMB_proc_open,
 899         .proc_read      = seq_read,
 900         .proc_lseek     = seq_lseek,
 901         .proc_release   = single_release,
 902         .proc_write     = traceSMB_proc_write,
 903 };
 904
 905 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 906 {
 907         seq_printf(m, "0x%x\n", global_secflags);
 908         return 0;
 909 }
 910
 911 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 912 {
 913         return single_open(file, cifs_security_flags_proc_show, NULL);
 914 }
 915
 916 /*
 917  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 918  * flags except for the ones corresponding to the given MUST flag. If there are
 919  * multiple MUST flags, then try to prefer more secure ones.
 920  */
 921 static void
 922 cifs_security_flags_handle_must_flags(unsigned int *flags)
 923 {
 924         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 925
 926         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 927                 *flags = CIFSSEC_MUST_KRB5;
 928         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 929                 *flags = CIFSSEC_MUST_NTLMSSP;
 930         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 931                 *flags = CIFSSEC_MUST_NTLMV2;
 932         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 933                 *flags = CIFSSEC_MUST_NTLM;
 934         else if (CIFSSEC_MUST_LANMAN &&
 935                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 936                 *flags = CIFSSEC_MUST_LANMAN;
 937         else if (CIFSSEC_MUST_PLNTXT &&
 938                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 939                 *flags = CIFSSEC_MUST_PLNTXT;
 940
 941         *flags |= signflags;
 942 }
 943
 944 static ssize_t cifs_security_flags_proc_write(struct file *file,
 945                 const char __user *buffer, size_t count, loff_t *ppos)
 946 {
 947         int rc;
 948         unsigned int flags;
 949         char flags_string[12];
 950         bool bv;
 951
 952         if ((count < 1) || (count > 11))
 953                 return -EINVAL;
 954
 955         memset(flags_string, 0, 12);
 956
 957         if (copy_from_user(flags_string, buffer, count))
 958                 return -EFAULT;
 959
 960         if (count < 3) {
 961                 /* single char or single char followed by null */
 962                 if (strtobool(flags_string, &bv) == 0) {
 963                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 964                         return count;
 965                 } else if (!isdigit(flags_string[0])) {
 966                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 967                                         flags_string);
 968                         return -EINVAL;
 969                 }
 970         }
 971
 972         /* else we have a number */
 973         rc = kstrtouint(flags_string, 0, &flags);
 974         if (rc) {
 975                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 976                                 flags_string);
 977                 return rc;
 978         }
 979
 980         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 981
 982         if (flags == 0)  {
 983                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 984                 return -EINVAL;
 985         }
 986
 987         if (flags & ~CIFSSEC_MASK) {
 988                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 989                          flags & ~CIFSSEC_MASK);
 990                 return -EINVAL;
 991         }
 992
 993         cifs_security_flags_handle_must_flags(&flags);
 994
 995         /* flags look ok - update the global security flags for cifs module */
 996         global_secflags = flags;
 997         if (global_secflags & CIFSSEC_MUST_SIGN) {
 998                 /* requiring signing implies signing is allowed */
 999                 global_secflags |= CIFSSEC_MAY_SIGN;
1000                 cifs_dbg(FYI, "packet signing now required\n");
1001         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1002                 cifs_dbg(FYI, "packet signing disabled\n");
1003         }
1004         /* BB should we turn on MAY flags for other MUST options? */
1005         return count;
1006 }
1007
1008 static const struct proc_ops cifs_security_flags_proc_ops = {
1009         .proc_open      = cifs_security_flags_proc_open,
1010         .proc_read      = seq_read,
1011         .proc_lseek     = seq_lseek,
1012         .proc_release   = single_release,
1013         .proc_write     = cifs_security_flags_proc_write,
1014 };
1015
1016 /* To make it easier to debug, can help to show mount params */
1017 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1018 {
1019         const struct fs_parameter_spec *p;
1020         const char *type;
1021
1022         for (p = smb3_fs_parameters; p->name; p++) {
1023                 /* cannot use switch with pointers... */
1024                 if (!p->type) {
1025                         if (p->flags == fs_param_neg_with_no)
1026                                 type = "noflag";
1027                         else
1028                                 type = "flag";
1029                 } else if (p->type == fs_param_is_bool)
1030                         type = "bool";
1031                 else if (p->type == fs_param_is_u32)
1032                         type = "u32";
1033                 else if (p->type == fs_param_is_u64)
1034                         type = "u64";
1035                 else if (p->type == fs_param_is_string)
1036                         type = "string";
1037                 else
1038                         type = "unknown";
1039
1040                 seq_printf(m, "%s:%s\n", p->name, type);
1041         }
1042
1043         return 0;
1044 }
1045
1046 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1047 {
1048         return single_open(file, cifs_mount_params_proc_show, NULL);
1049 }
1050
1051 static const struct proc_ops cifs_mount_params_proc_ops = {
1052         .proc_open      = cifs_mount_params_proc_open,
1053         .proc_read      = seq_read,
1054         .proc_lseek     = seq_lseek,
1055         .proc_release   = single_release,
1056         /* No need for write for now */
1057         /* .proc_write  = cifs_mount_params_proc_write, */
1058 };
1059
1060 #else
1061 inline void cifs_proc_init(void)
1062 {
1063 }
1064
1065 inline void cifs_proc_clean(void)
1066 {
1067 }
1068 #endif /* PROC_FS */