fs/cifs/cifs_debug.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2000,2005
   5  *
   6  *   Modified by Steve French (sfrench@us.ibm.com)
   7  */
   8 #include <linux/fs.h>
   9 #include <linux/string.h>
  10 #include <linux/ctype.h>
  11 #include <linux/module.h>
  12 #include <linux/proc_fs.h>
  13 #include <linux/uaccess.h>
  14 #include "cifspdu.h"
  15 #include "cifsglob.h"
  16 #include "cifsproto.h"
  17 #include "cifs_debug.h"
  18 #include "cifsfs.h"
  19 #include "fs_context.h"
  20 #ifdef CONFIG_CIFS_DFS_UPCALL
  21 #include "dfs_cache.h"
  22 #endif
  23 #ifdef CONFIG_CIFS_SMB_DIRECT
  24 #include "smbdirect.h"
  25 #endif
  26 #include "cifs_swn.h"
  27
  28 void
  29 cifs_dump_mem(char *label, void *data, int length)
  30 {
  31         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  32         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  33                        data, length, true);
  34 }
  35
  36 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  37 {
  38 #ifdef CONFIG_CIFS_DEBUG2
  39         struct smb_hdr *smb = (struct smb_hdr *)buf;
  40
  41         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  42                  smb->Command, smb->Status.CifsError,
  43                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  44         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  45                  server->ops->calc_smb_size(smb, server));
  46 #endif /* CONFIG_CIFS_DEBUG2 */
  47 }
  48
  49 void cifs_dump_mids(struct TCP_Server_Info *server)
  50 {
  51 #ifdef CONFIG_CIFS_DEBUG2
  52         struct mid_q_entry *mid_entry;
  53
  54         if (server == NULL)
  55                 return;
  56
  57         cifs_dbg(VFS, "Dump pending requests:\n");
  58         spin_lock(&GlobalMid_Lock);
  59         list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
  60                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  61                          mid_entry->mid_state,
  62                          le16_to_cpu(mid_entry->command),
  63                          mid_entry->pid,
  64                          mid_entry->callback_data,
  65                          mid_entry->mid);
  66 #ifdef CONFIG_CIFS_STATS2
  67                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  68                          mid_entry->large_buf,
  69                          mid_entry->resp_buf,
  70                          mid_entry->when_received,
  71                          jiffies);
  72 #endif /* STATS2 */
  73                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  74                          mid_entry->multiRsp, mid_entry->multiEnd);
  75                 if (mid_entry->resp_buf) {
  76                         cifs_dump_detail(mid_entry->resp_buf, server);
  77                         cifs_dump_mem("existing buf: ",
  78                                 mid_entry->resp_buf, 62);
  79                 }
  80         }
  81         spin_unlock(&GlobalMid_Lock);
  82 #endif /* CONFIG_CIFS_DEBUG2 */
  83 }
  84
  85 #ifdef CONFIG_PROC_FS
  86 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
  87 {
  88         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
  89
  90         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
  91         if (tcon->nativeFileSystem)
  92                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
  93         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
  94                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
  95                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
  96                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
  97                    tcon->status);
  98         if (dev_type == FILE_DEVICE_DISK)
  99                 seq_puts(m, " type: DISK ");
 100         else if (dev_type == FILE_DEVICE_CD_ROM)
 101                 seq_puts(m, " type: CDROM ");
 102         else
 103                 seq_printf(m, " type: %d ", dev_type);
 104
 105         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 106
 107         if ((tcon->seal) ||
 108             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 109             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 110                 seq_printf(m, " Encrypted");
 111         if (tcon->nocase)
 112                 seq_printf(m, " nocase");
 113         if (tcon->unix_ext)
 114                 seq_printf(m, " POSIX Extensions");
 115         if (tcon->ses->server->ops->dump_share_caps)
 116                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 117         if (tcon->use_witness)
 118                 seq_puts(m, " Witness");
 119
 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> <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%x %d %d %d %pd",
 194                                                 tcon->tid,
 195                                                 cfile->fid.persistent_fid,
 196                                                 cfile->f_flags,
 197                                                 cfile->count,
 198                                                 cfile->pid,
 199                                                 from_kuid(&init_user_ns, cfile->uid),
 200                                                 cfile->dentry);
 201 #ifdef CONFIG_CIFS_DEBUG2
 202                                         seq_printf(m, " %llu\n", cfile->fid.mid);
 203 #else
 204                                         seq_printf(m, "\n");
 205 #endif /* CIFS_DEBUG2 */
 206                                 }
 207                                 spin_unlock(&tcon->open_file_lock);
 208                         }
 209                 }
 210         }
 211         spin_unlock(&cifs_tcp_ses_lock);
 212         seq_putc(m, '\n');
 213         return 0;
 214 }
 215
 216 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 217 {
 218         struct list_head *tmp2, *tmp3;
 219         struct mid_q_entry *mid_entry;
 220         struct TCP_Server_Info *server;
 221         struct cifs_ses *ses;
 222         struct cifs_tcon *tcon;
 223         int c, i, j;
 224
 225         seq_puts(m,
 226                     "Display Internal CIFS Data Structures for Debugging\n"
 227                     "---------------------------------------------------\n");
 228         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 229         seq_printf(m, "Features:");
 230 #ifdef CONFIG_CIFS_DFS_UPCALL
 231         seq_printf(m, " DFS");
 232 #endif
 233 #ifdef CONFIG_CIFS_FSCACHE
 234         seq_printf(m, ",FSCACHE");
 235 #endif
 236 #ifdef CONFIG_CIFS_SMB_DIRECT
 237         seq_printf(m, ",SMB_DIRECT");
 238 #endif
 239 #ifdef CONFIG_CIFS_STATS2
 240         seq_printf(m, ",STATS2");
 241 #else
 242         seq_printf(m, ",STATS");
 243 #endif
 244 #ifdef CONFIG_CIFS_DEBUG2
 245         seq_printf(m, ",DEBUG2");
 246 #elif defined(CONFIG_CIFS_DEBUG)
 247         seq_printf(m, ",DEBUG");
 248 #endif
 249 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 250         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 251 #endif
 252 #ifdef CONFIG_CIFS_POSIX
 253         seq_printf(m, ",CIFS_POSIX");
 254 #endif
 255 #ifdef CONFIG_CIFS_UPCALL
 256         seq_printf(m, ",UPCALL(SPNEGO)");
 257 #endif
 258 #ifdef CONFIG_CIFS_XATTR
 259         seq_printf(m, ",XATTR");
 260 #endif
 261         seq_printf(m, ",ACL");
 262 #ifdef CONFIG_CIFS_SWN_UPCALL
 263         seq_puts(m, ",WITNESS");
 264 #endif
 265         seq_putc(m, '\n');
 266         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 267         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 268
 269         seq_printf(m, "\nServers: ");
 270
 271         c = 0;
 272         spin_lock(&cifs_tcp_ses_lock);
 273         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 274                 /* channel info will be printed as a part of sessions below */
 275                 if (CIFS_SERVER_IS_CHAN(server))
 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 (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
 420                                 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
 421
 422                         if (ses->chan_count > 1) {
 423                                 seq_printf(m, "\n\n\tExtra Channels: %zu ",
 424                                            ses->chan_count-1);
 425                                 for (j = 1; j < ses->chan_count; j++) {
 426                                         cifs_dump_channel(m, j, &ses->chans[j]);
 427                                         if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
 428                                                 seq_puts(m, "\tDISCONNECTED ");
 429                                 }
 430                         }
 431                         spin_unlock(&ses->chan_lock);
 432
 433                         seq_puts(m, "\n\n\tShares: ");
 434                         j = 0;
 435
 436                         seq_printf(m, "\n\t%d) IPC: ", j);
 437                         if (ses->tcon_ipc)
 438                                 cifs_debug_tcon(m, ses->tcon_ipc);
 439                         else
 440                                 seq_puts(m, "none\n");
 441
 442                         list_for_each(tmp3, &ses->tcon_list) {
 443                                 tcon = list_entry(tmp3, struct cifs_tcon,
 444                                                   tcon_list);
 445                                 ++j;
 446                                 seq_printf(m, "\n\t%d) ", j);
 447                                 cifs_debug_tcon(m, tcon);
 448                         }
 449
 450                         spin_lock(&ses->iface_lock);
 451                         if (ses->iface_count)
 452                                 seq_printf(m, "\n\n\tServer interfaces: %zu",
 453                                            ses->iface_count);
 454                         for (j = 0; j < ses->iface_count; j++) {
 455                                 struct cifs_server_iface *iface;
 456
 457                                 iface = &ses->iface_list[j];
 458                                 seq_printf(m, "\n\t%d)", j+1);
 459                                 cifs_dump_iface(m, iface);
 460                                 if (is_ses_using_iface(ses, iface))
 461                                         seq_puts(m, "\t\t[CONNECTED]\n");
 462                         }
 463                         spin_unlock(&ses->iface_lock);
 464                 }
 465                 if (i == 0)
 466                         seq_printf(m, "\n\t\t[NONE]");
 467
 468                 seq_puts(m, "\n\n\tMIDs: ");
 469                 spin_lock(&GlobalMid_Lock);
 470                 list_for_each(tmp3, &server->pending_mid_q) {
 471                         mid_entry = list_entry(tmp3, struct mid_q_entry,
 472                                         qhead);
 473                         seq_printf(m, "\n\tState: %d com: %d pid:"
 474                                         " %d cbdata: %p mid %llu\n",
 475                                         mid_entry->mid_state,
 476                                         le16_to_cpu(mid_entry->command),
 477                                         mid_entry->pid,
 478                                         mid_entry->callback_data,
 479                                         mid_entry->mid);
 480                 }
 481                 spin_unlock(&GlobalMid_Lock);
 482                 seq_printf(m, "\n--\n");
 483         }
 484         if (c == 0)
 485                 seq_printf(m, "\n\t[NONE]");
 486
 487         spin_unlock(&cifs_tcp_ses_lock);
 488         seq_putc(m, '\n');
 489         cifs_swn_dump(m);
 490
 491         /* BB add code to dump additional info such as TCP session info now */
 492         return 0;
 493 }
 494
 495 static ssize_t cifs_stats_proc_write(struct file *file,
 496                 const char __user *buffer, size_t count, loff_t *ppos)
 497 {
 498         bool bv;
 499         int rc;
 500         struct list_head *tmp1, *tmp2, *tmp3;
 501         struct TCP_Server_Info *server;
 502         struct cifs_ses *ses;
 503         struct cifs_tcon *tcon;
 504
 505         rc = kstrtobool_from_user(buffer, count, &bv);
 506         if (rc == 0) {
 507 #ifdef CONFIG_CIFS_STATS2
 508                 int i;
 509
 510                 atomic_set(&totBufAllocCount, 0);
 511                 atomic_set(&totSmBufAllocCount, 0);
 512 #endif /* CONFIG_CIFS_STATS2 */
 513                 atomic_set(&tcpSesReconnectCount, 0);
 514                 atomic_set(&tconInfoReconnectCount, 0);
 515
 516                 spin_lock(&GlobalMid_Lock);
 517                 GlobalMaxActiveXid = 0;
 518                 GlobalCurrentXid = 0;
 519                 spin_unlock(&GlobalMid_Lock);
 520                 spin_lock(&cifs_tcp_ses_lock);
 521                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 522                         server = list_entry(tmp1, struct TCP_Server_Info,
 523                                             tcp_ses_list);
 524                         server->max_in_flight = 0;
 525 #ifdef CONFIG_CIFS_STATS2
 526                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 527                                 atomic_set(&server->num_cmds[i], 0);
 528                                 atomic_set(&server->smb2slowcmd[i], 0);
 529                                 server->time_per_cmd[i] = 0;
 530                                 server->slowest_cmd[i] = 0;
 531                                 server->fastest_cmd[0] = 0;
 532                         }
 533 #endif /* CONFIG_CIFS_STATS2 */
 534                         list_for_each(tmp2, &server->smb_ses_list) {
 535                                 ses = list_entry(tmp2, struct cifs_ses,
 536                                                  smb_ses_list);
 537                                 list_for_each(tmp3, &ses->tcon_list) {
 538                                         tcon = list_entry(tmp3,
 539                                                           struct cifs_tcon,
 540                                                           tcon_list);
 541                                         atomic_set(&tcon->num_smbs_sent, 0);
 542                                         spin_lock(&tcon->stat_lock);
 543                                         tcon->bytes_read = 0;
 544                                         tcon->bytes_written = 0;
 545                                         spin_unlock(&tcon->stat_lock);
 546                                         if (server->ops->clear_stats)
 547                                                 server->ops->clear_stats(tcon);
 548                                 }
 549                         }
 550                 }
 551                 spin_unlock(&cifs_tcp_ses_lock);
 552         } else {
 553                 return rc;
 554         }
 555
 556         return count;
 557 }
 558
 559 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 560 {
 561         int i;
 562 #ifdef CONFIG_CIFS_STATS2
 563         int j;
 564 #endif /* STATS2 */
 565         struct list_head *tmp2, *tmp3;
 566         struct TCP_Server_Info *server;
 567         struct cifs_ses *ses;
 568         struct cifs_tcon *tcon;
 569
 570         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 571                         sesInfoAllocCount.counter);
 572         seq_printf(m, "Share (unique mount targets): %d\n",
 573                         tconInfoAllocCount.counter);
 574         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 575                         bufAllocCount.counter,
 576                         cifs_min_rcv + tcpSesAllocCount.counter);
 577         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 578                         smBufAllocCount.counter, cifs_min_small);
 579 #ifdef CONFIG_CIFS_STATS2
 580         seq_printf(m, "Total Large %d Small %d Allocations\n",
 581                                 atomic_read(&totBufAllocCount),
 582                                 atomic_read(&totSmBufAllocCount));
 583 #endif /* CONFIG_CIFS_STATS2 */
 584
 585         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 586         seq_printf(m,
 587                 "\n%d session %d share reconnects\n",
 588                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 589
 590         seq_printf(m,
 591                 "Total vfs operations: %d maximum at one time: %d\n",
 592                 GlobalCurrentXid, GlobalMaxActiveXid);
 593
 594         i = 0;
 595         spin_lock(&cifs_tcp_ses_lock);
 596         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
 597                 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
 598 #ifdef CONFIG_CIFS_STATS2
 599                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 600                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 601                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 602                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 603                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 604                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 605                                 atomic_read(&server->num_cmds[j]),
 606                                 server->time_per_cmd[j],
 607                                 server->fastest_cmd[j],
 608                                 server->slowest_cmd[j]);
 609                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 610                         if (atomic_read(&server->smb2slowcmd[j]))
 611                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 612                                         atomic_read(&server->smb2slowcmd[j]),
 613                                         server->hostname, j);
 614 #endif /* STATS2 */
 615                 list_for_each(tmp2, &server->smb_ses_list) {
 616                         ses = list_entry(tmp2, struct cifs_ses,
 617                                          smb_ses_list);
 618                         list_for_each(tmp3, &ses->tcon_list) {
 619                                 tcon = list_entry(tmp3,
 620                                                   struct cifs_tcon,
 621                                                   tcon_list);
 622                                 i++;
 623                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 624                                 if (tcon->need_reconnect)
 625                                         seq_puts(m, "\tDISCONNECTED ");
 626                                 seq_printf(m, "\nSMBs: %d",
 627                                            atomic_read(&tcon->num_smbs_sent));
 628                                 if (server->ops->print_stats)
 629                                         server->ops->print_stats(m, tcon);
 630                         }
 631                 }
 632         }
 633         spin_unlock(&cifs_tcp_ses_lock);
 634
 635         seq_putc(m, '\n');
 636         return 0;
 637 }
 638
 639 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 640 {
 641         return single_open(file, cifs_stats_proc_show, NULL);
 642 }
 643
 644 static const struct proc_ops cifs_stats_proc_ops = {
 645         .proc_open      = cifs_stats_proc_open,
 646         .proc_read      = seq_read,
 647         .proc_lseek     = seq_lseek,
 648         .proc_release   = single_release,
 649         .proc_write     = cifs_stats_proc_write,
 650 };
 651
 652 #ifdef CONFIG_CIFS_SMB_DIRECT
 653 #define PROC_FILE_DEFINE(name) \
 654 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 655         size_t count, loff_t *ppos) \
 656 { \
 657         int rc; \
 658         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 659         if (rc) \
 660                 return rc; \
 661         return count; \
 662 } \
 663 static int name##_proc_show(struct seq_file *m, void *v) \
 664 { \
 665         seq_printf(m, "%d\n", name ); \
 666         return 0; \
 667 } \
 668 static int name##_open(struct inode *inode, struct file *file) \
 669 { \
 670         return single_open(file, name##_proc_show, NULL); \
 671 } \
 672 \
 673 static const struct proc_ops cifs_##name##_proc_fops = { \
 674         .proc_open      = name##_open, \
 675         .proc_read      = seq_read, \
 676         .proc_lseek     = seq_lseek, \
 677         .proc_release   = single_release, \
 678         .proc_write     = name##_write, \
 679 }
 680
 681 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 682 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 683 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 684 PROC_FILE_DEFINE(smbd_max_receive_size);
 685 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 686 PROC_FILE_DEFINE(smbd_max_send_size);
 687 PROC_FILE_DEFINE(smbd_send_credit_target);
 688 PROC_FILE_DEFINE(smbd_receive_credit_max);
 689 #endif
 690
 691 static struct proc_dir_entry *proc_fs_cifs;
 692 static const struct proc_ops cifsFYI_proc_ops;
 693 static const struct proc_ops cifs_lookup_cache_proc_ops;
 694 static const struct proc_ops traceSMB_proc_ops;
 695 static const struct proc_ops cifs_security_flags_proc_ops;
 696 static const struct proc_ops cifs_linux_ext_proc_ops;
 697 static const struct proc_ops cifs_mount_params_proc_ops;
 698
 699 void
 700 cifs_proc_init(void)
 701 {
 702         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 703         if (proc_fs_cifs == NULL)
 704                 return;
 705
 706         proc_create_single("DebugData", 0, proc_fs_cifs,
 707                         cifs_debug_data_proc_show);
 708
 709         proc_create_single("open_files", 0400, proc_fs_cifs,
 710                         cifs_debug_files_proc_show);
 711
 712         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
 713         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
 714         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
 715         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 716                     &cifs_linux_ext_proc_ops);
 717         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 718                     &cifs_security_flags_proc_ops);
 719         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 720                     &cifs_lookup_cache_proc_ops);
 721
 722         proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
 723
 724 #ifdef CONFIG_CIFS_DFS_UPCALL
 725         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
 726 #endif
 727
 728 #ifdef CONFIG_CIFS_SMB_DIRECT
 729         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 730                 &cifs_rdma_readwrite_threshold_proc_fops);
 731         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 732                 &cifs_smbd_max_frmr_depth_proc_fops);
 733         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 734                 &cifs_smbd_keep_alive_interval_proc_fops);
 735         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 736                 &cifs_smbd_max_receive_size_proc_fops);
 737         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 738                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 739         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 740                 &cifs_smbd_max_send_size_proc_fops);
 741         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 742                 &cifs_smbd_send_credit_target_proc_fops);
 743         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 744                 &cifs_smbd_receive_credit_max_proc_fops);
 745 #endif
 746 }
 747
 748 void
 749 cifs_proc_clean(void)
 750 {
 751         if (proc_fs_cifs == NULL)
 752                 return;
 753
 754         remove_proc_entry("DebugData", proc_fs_cifs);
 755         remove_proc_entry("open_files", proc_fs_cifs);
 756         remove_proc_entry("cifsFYI", proc_fs_cifs);
 757         remove_proc_entry("traceSMB", proc_fs_cifs);
 758         remove_proc_entry("Stats", proc_fs_cifs);
 759         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 760         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 761         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 762         remove_proc_entry("mount_params", proc_fs_cifs);
 763
 764 #ifdef CONFIG_CIFS_DFS_UPCALL
 765         remove_proc_entry("dfscache", proc_fs_cifs);
 766 #endif
 767 #ifdef CONFIG_CIFS_SMB_DIRECT
 768         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 769         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 770         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 771         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 772         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 773         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 774         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 775         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 776 #endif
 777         remove_proc_entry("fs/cifs", NULL);
 778 }
 779
 780 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 781 {
 782         seq_printf(m, "%d\n", cifsFYI);
 783         return 0;
 784 }
 785
 786 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 787 {
 788         return single_open(file, cifsFYI_proc_show, NULL);
 789 }
 790
 791 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 792                 size_t count, loff_t *ppos)
 793 {
 794         char c[2] = { '\0' };
 795         bool bv;
 796         int rc;
 797
 798         rc = get_user(c[0], buffer);
 799         if (rc)
 800                 return rc;
 801         if (strtobool(c, &bv) == 0)
 802                 cifsFYI = bv;
 803         else if ((c[0] > '1') && (c[0] <= '9'))
 804                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 805         else
 806                 return -EINVAL;
 807
 808         return count;
 809 }
 810
 811 static const struct proc_ops cifsFYI_proc_ops = {
 812         .proc_open      = cifsFYI_proc_open,
 813         .proc_read      = seq_read,
 814         .proc_lseek     = seq_lseek,
 815         .proc_release   = single_release,
 816         .proc_write     = cifsFYI_proc_write,
 817 };
 818
 819 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 820 {
 821         seq_printf(m, "%d\n", linuxExtEnabled);
 822         return 0;
 823 }
 824
 825 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 826 {
 827         return single_open(file, cifs_linux_ext_proc_show, NULL);
 828 }
 829
 830 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 831                 const char __user *buffer, size_t count, loff_t *ppos)
 832 {
 833         int rc;
 834
 835         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 836         if (rc)
 837                 return rc;
 838
 839         return count;
 840 }
 841
 842 static const struct proc_ops cifs_linux_ext_proc_ops = {
 843         .proc_open      = cifs_linux_ext_proc_open,
 844         .proc_read      = seq_read,
 845         .proc_lseek     = seq_lseek,
 846         .proc_release   = single_release,
 847         .proc_write     = cifs_linux_ext_proc_write,
 848 };
 849
 850 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 851 {
 852         seq_printf(m, "%d\n", lookupCacheEnabled);
 853         return 0;
 854 }
 855
 856 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 857 {
 858         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 859 }
 860
 861 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 862                 const char __user *buffer, size_t count, loff_t *ppos)
 863 {
 864         int rc;
 865
 866         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 867         if (rc)
 868                 return rc;
 869
 870         return count;
 871 }
 872
 873 static const struct proc_ops cifs_lookup_cache_proc_ops = {
 874         .proc_open      = cifs_lookup_cache_proc_open,
 875         .proc_read      = seq_read,
 876         .proc_lseek     = seq_lseek,
 877         .proc_release   = single_release,
 878         .proc_write     = cifs_lookup_cache_proc_write,
 879 };
 880
 881 static int traceSMB_proc_show(struct seq_file *m, void *v)
 882 {
 883         seq_printf(m, "%d\n", traceSMB);
 884         return 0;
 885 }
 886
 887 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 888 {
 889         return single_open(file, traceSMB_proc_show, NULL);
 890 }
 891
 892 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 893                 size_t count, loff_t *ppos)
 894 {
 895         int rc;
 896
 897         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 898         if (rc)
 899                 return rc;
 900
 901         return count;
 902 }
 903
 904 static const struct proc_ops traceSMB_proc_ops = {
 905         .proc_open      = traceSMB_proc_open,
 906         .proc_read      = seq_read,
 907         .proc_lseek     = seq_lseek,
 908         .proc_release   = single_release,
 909         .proc_write     = traceSMB_proc_write,
 910 };
 911
 912 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 913 {
 914         seq_printf(m, "0x%x\n", global_secflags);
 915         return 0;
 916 }
 917
 918 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 919 {
 920         return single_open(file, cifs_security_flags_proc_show, NULL);
 921 }
 922
 923 /*
 924  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 925  * flags except for the ones corresponding to the given MUST flag. If there are
 926  * multiple MUST flags, then try to prefer more secure ones.
 927  */
 928 static void
 929 cifs_security_flags_handle_must_flags(unsigned int *flags)
 930 {
 931         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 932
 933         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 934                 *flags = CIFSSEC_MUST_KRB5;
 935         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 936                 *flags = CIFSSEC_MUST_NTLMSSP;
 937         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 938                 *flags = CIFSSEC_MUST_NTLMV2;
 939
 940         *flags |= signflags;
 941 }
 942
 943 static ssize_t cifs_security_flags_proc_write(struct file *file,
 944                 const char __user *buffer, size_t count, loff_t *ppos)
 945 {
 946         int rc;
 947         unsigned int flags;
 948         char flags_string[12];
 949         bool bv;
 950
 951         if ((count < 1) || (count > 11))
 952                 return -EINVAL;
 953
 954         memset(flags_string, 0, 12);
 955
 956         if (copy_from_user(flags_string, buffer, count))
 957                 return -EFAULT;
 958
 959         if (count < 3) {
 960                 /* single char or single char followed by null */
 961                 if (strtobool(flags_string, &bv) == 0) {
 962                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 963                         return count;
 964                 } else if (!isdigit(flags_string[0])) {
 965                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 966                                         flags_string);
 967                         return -EINVAL;
 968                 }
 969         }
 970
 971         /* else we have a number */
 972         rc = kstrtouint(flags_string, 0, &flags);
 973         if (rc) {
 974                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 975                                 flags_string);
 976                 return rc;
 977         }
 978
 979         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 980
 981         if (flags == 0)  {
 982                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 983                 return -EINVAL;
 984         }
 985
 986         if (flags & ~CIFSSEC_MASK) {
 987                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 988                          flags & ~CIFSSEC_MASK);
 989                 return -EINVAL;
 990         }
 991
 992         cifs_security_flags_handle_must_flags(&flags);
 993
 994         /* flags look ok - update the global security flags for cifs module */
 995         global_secflags = flags;
 996         if (global_secflags & CIFSSEC_MUST_SIGN) {
 997                 /* requiring signing implies signing is allowed */
 998                 global_secflags |= CIFSSEC_MAY_SIGN;
 999                 cifs_dbg(FYI, "packet signing now required\n");
1000         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1001                 cifs_dbg(FYI, "packet signing disabled\n");
1002         }
1003         /* BB should we turn on MAY flags for other MUST options? */
1004         return count;
1005 }
1006
1007 static const struct proc_ops cifs_security_flags_proc_ops = {
1008         .proc_open      = cifs_security_flags_proc_open,
1009         .proc_read      = seq_read,
1010         .proc_lseek     = seq_lseek,
1011         .proc_release   = single_release,
1012         .proc_write     = cifs_security_flags_proc_write,
1013 };
1014
1015 /* To make it easier to debug, can help to show mount params */
1016 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1017 {
1018         const struct fs_parameter_spec *p;
1019         const char *type;
1020
1021         for (p = smb3_fs_parameters; p->name; p++) {
1022                 /* cannot use switch with pointers... */
1023                 if (!p->type) {
1024                         if (p->flags == fs_param_neg_with_no)
1025                                 type = "noflag";
1026                         else
1027                                 type = "flag";
1028                 } else if (p->type == fs_param_is_bool)
1029                         type = "bool";
1030                 else if (p->type == fs_param_is_u32)
1031                         type = "u32";
1032                 else if (p->type == fs_param_is_u64)
1033                         type = "u64";
1034                 else if (p->type == fs_param_is_string)
1035                         type = "string";
1036                 else
1037                         type = "unknown";
1038
1039                 seq_printf(m, "%s:%s\n", p->name, type);
1040         }
1041
1042         return 0;
1043 }
1044
1045 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1046 {
1047         return single_open(file, cifs_mount_params_proc_show, NULL);
1048 }
1049
1050 static const struct proc_ops cifs_mount_params_proc_ops = {
1051         .proc_open      = cifs_mount_params_proc_open,
1052         .proc_read      = seq_read,
1053         .proc_lseek     = seq_lseek,
1054         .proc_release   = single_release,
1055         /* No need for write for now */
1056         /* .proc_write  = cifs_mount_params_proc_write, */
1057 };
1058
1059 #else
1060 inline void cifs_proc_init(void)
1061 {
1062 }
1063
1064 inline void cifs_proc_clean(void)
1065 {
1066 }
1067 #endif /* PROC_FS */