fs/cifs/cifs_debug.c

   1 /*
   2  *   fs/cifs_debug.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2000,2005
   5  *
   6  *   Modified by Steve French (sfrench@us.ibm.com)
   7  *
   8  *   This program is free software;  you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  16  *   the GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program;  if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22 #include <linux/fs.h>
  23 #include <linux/string.h>
  24 #include <linux/ctype.h>
  25 #include <linux/module.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/uaccess.h>
  28 #include "cifspdu.h"
  29 #include "cifsglob.h"
  30 #include "cifsproto.h"
  31 #include "cifs_debug.h"
  32 #include "cifsfs.h"
  33 #ifdef CONFIG_CIFS_DFS_UPCALL
  34 #include "dfs_cache.h"
  35 #endif
  36 #ifdef CONFIG_CIFS_SMB_DIRECT
  37 #include "smbdirect.h"
  38 #endif
  39
  40 void
  41 cifs_dump_mem(char *label, void *data, int length)
  42 {
  43         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  44         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  45                        data, length, true);
  46 }
  47
  48 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  49 {
  50 #ifdef CONFIG_CIFS_DEBUG2
  51         struct smb_hdr *smb = (struct smb_hdr *)buf;
  52
  53         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  54                  smb->Command, smb->Status.CifsError,
  55                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  56         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  57                  server->ops->calc_smb_size(smb, server));
  58 #endif /* CONFIG_CIFS_DEBUG2 */
  59 }
  60
  61 void cifs_dump_mids(struct TCP_Server_Info *server)
  62 {
  63 #ifdef CONFIG_CIFS_DEBUG2
  64         struct list_head *tmp;
  65         struct mid_q_entry *mid_entry;
  66
  67         if (server == NULL)
  68                 return;
  69
  70         cifs_dbg(VFS, "Dump pending requests:\n");
  71         spin_lock(&GlobalMid_Lock);
  72         list_for_each(tmp, &server->pending_mid_q) {
  73                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  74                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  75                          mid_entry->mid_state,
  76                          le16_to_cpu(mid_entry->command),
  77                          mid_entry->pid,
  78                          mid_entry->callback_data,
  79                          mid_entry->mid);
  80 #ifdef CONFIG_CIFS_STATS2
  81                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  82                          mid_entry->large_buf,
  83                          mid_entry->resp_buf,
  84                          mid_entry->when_received,
  85                          jiffies);
  86 #endif /* STATS2 */
  87                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  88                          mid_entry->multiRsp, mid_entry->multiEnd);
  89                 if (mid_entry->resp_buf) {
  90                         cifs_dump_detail(mid_entry->resp_buf, server);
  91                         cifs_dump_mem("existing buf: ",
  92                                 mid_entry->resp_buf, 62);
  93                 }
  94         }
  95         spin_unlock(&GlobalMid_Lock);
  96 #endif /* CONFIG_CIFS_DEBUG2 */
  97 }
  98
  99 #ifdef CONFIG_PROC_FS
 100 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
 101 {
 102         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 103
 104         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
 105         if (tcon->nativeFileSystem)
 106                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
 107         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
 108                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 109                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 110                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 111                    tcon->tidStatus);
 112         if (dev_type == FILE_DEVICE_DISK)
 113                 seq_puts(m, " type: DISK ");
 114         else if (dev_type == FILE_DEVICE_CD_ROM)
 115                 seq_puts(m, " type: CDROM ");
 116         else
 117                 seq_printf(m, " type: %d ", dev_type);
 118         if (tcon->seal)
 119                 seq_printf(m, " Encrypted");
 120         if (tcon->nocase)
 121                 seq_printf(m, " nocase");
 122         if (tcon->unix_ext)
 123                 seq_printf(m, " POSIX Extensions");
 124         if (tcon->ses->server->ops->dump_share_caps)
 125                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 126
 127         if (tcon->need_reconnect)
 128                 seq_puts(m, "\tDISCONNECTED ");
 129         seq_putc(m, '\n');
 130 }
 131
 132 static void
 133 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 134 {
 135         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 136         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 137
 138         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 139         seq_puts(m, "\t\tCapabilities: ");
 140         if (iface->rdma_capable)
 141                 seq_puts(m, "rdma ");
 142         if (iface->rss_capable)
 143                 seq_puts(m, "rss ");
 144         seq_putc(m, '\n');
 145         if (iface->sockaddr.ss_family == AF_INET)
 146                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 147         else if (iface->sockaddr.ss_family == AF_INET6)
 148                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 149 }
 150
 151 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 152 {
 153         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 154         struct TCP_Server_Info *server;
 155         struct cifs_ses *ses;
 156         struct cifs_tcon *tcon;
 157         struct cifsFileInfo *cfile;
 158
 159         seq_puts(m, "# Version:1\n");
 160         seq_puts(m, "# Format:\n");
 161         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 162 #ifdef CONFIG_CIFS_DEBUG2
 163         seq_printf(m, " <filename> <mid>\n");
 164 #else
 165         seq_printf(m, " <filename>\n");
 166 #endif /* CIFS_DEBUG2 */
 167         spin_lock(&cifs_tcp_ses_lock);
 168         list_for_each(stmp, &cifs_tcp_ses_list) {
 169                 server = list_entry(stmp, struct TCP_Server_Info,
 170                                     tcp_ses_list);
 171                 list_for_each(tmp, &server->smb_ses_list) {
 172                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 173                         list_for_each(tmp1, &ses->tcon_list) {
 174                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 175                                 spin_lock(&tcon->open_file_lock);
 176                                 list_for_each(tmp2, &tcon->openFileList) {
 177                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 178                                                      tlist);
 179                                         seq_printf(m,
 180                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 181                                                 tcon->tid,
 182                                                 cfile->fid.persistent_fid,
 183                                                 cfile->f_flags,
 184                                                 cfile->count,
 185                                                 cfile->pid,
 186                                                 from_kuid(&init_user_ns, cfile->uid),
 187                                                 cfile->dentry->d_name.name);
 188 #ifdef CONFIG_CIFS_DEBUG2
 189                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 190 #else
 191                                         seq_printf(m, "\n");
 192 #endif /* CIFS_DEBUG2 */
 193                                 }
 194                                 spin_unlock(&tcon->open_file_lock);
 195                         }
 196                 }
 197         }
 198         spin_unlock(&cifs_tcp_ses_lock);
 199         seq_putc(m, '\n');
 200         return 0;
 201 }
 202
 203 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 204 {
 205         struct list_head *tmp1, *tmp2, *tmp3;
 206         struct mid_q_entry *mid_entry;
 207         struct TCP_Server_Info *server;
 208         struct cifs_ses *ses;
 209         struct cifs_tcon *tcon;
 210         int i, j;
 211
 212         seq_puts(m,
 213                     "Display Internal CIFS Data Structures for Debugging\n"
 214                     "---------------------------------------------------\n");
 215         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 216         seq_printf(m, "Features:");
 217 #ifdef CONFIG_CIFS_DFS_UPCALL
 218         seq_printf(m, " DFS");
 219 #endif
 220 #ifdef CONFIG_CIFS_FSCACHE
 221         seq_printf(m, ",FSCACHE");
 222 #endif
 223 #ifdef CONFIG_CIFS_SMB_DIRECT
 224         seq_printf(m, ",SMB_DIRECT");
 225 #endif
 226 #ifdef CONFIG_CIFS_STATS2
 227         seq_printf(m, ",STATS2");
 228 #else
 229         seq_printf(m, ",STATS");
 230 #endif
 231 #ifdef CONFIG_CIFS_DEBUG2
 232         seq_printf(m, ",DEBUG2");
 233 #elif defined(CONFIG_CIFS_DEBUG)
 234         seq_printf(m, ",DEBUG");
 235 #endif
 236 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 237         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 238 #endif
 239 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 240         seq_printf(m, ",WEAK_PW_HASH");
 241 #endif
 242 #ifdef CONFIG_CIFS_POSIX
 243         seq_printf(m, ",CIFS_POSIX");
 244 #endif
 245 #ifdef CONFIG_CIFS_UPCALL
 246         seq_printf(m, ",UPCALL(SPNEGO)");
 247 #endif
 248 #ifdef CONFIG_CIFS_XATTR
 249         seq_printf(m, ",XATTR");
 250 #endif
 251 #ifdef CONFIG_CIFS_ACL
 252         seq_printf(m, ",ACL");
 253 #endif
 254         seq_putc(m, '\n');
 255         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 256         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 257         seq_printf(m, "Servers:");
 258
 259         i = 0;
 260         spin_lock(&cifs_tcp_ses_lock);
 261         list_for_each(tmp1, &cifs_tcp_ses_list) {
 262                 server = list_entry(tmp1, struct TCP_Server_Info,
 263                                     tcp_ses_list);
 264
 265 #ifdef CONFIG_CIFS_SMB_DIRECT
 266                 if (!server->rdma)
 267                         goto skip_rdma;
 268
 269                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 270                         "transport status: %x",
 271                         server->smbd_conn->protocol,
 272                         server->smbd_conn->transport_status);
 273                 seq_printf(m, "\nConn receive_credit_max: %x "
 274                         "send_credit_target: %x max_send_size: %x",
 275                         server->smbd_conn->receive_credit_max,
 276                         server->smbd_conn->send_credit_target,
 277                         server->smbd_conn->max_send_size);
 278                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 279                         "max_fragmented_send_size: %x max_receive_size:%x",
 280                         server->smbd_conn->max_fragmented_recv_size,
 281                         server->smbd_conn->max_fragmented_send_size,
 282                         server->smbd_conn->max_receive_size);
 283                 seq_printf(m, "\nConn keep_alive_interval: %x "
 284                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 285                         server->smbd_conn->keep_alive_interval,
 286                         server->smbd_conn->max_readwrite_size,
 287                         server->smbd_conn->rdma_readwrite_threshold);
 288                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 289                         "count_put_receive_buffer: %x count_send_empty: %x",
 290                         server->smbd_conn->count_get_receive_buffer,
 291                         server->smbd_conn->count_put_receive_buffer,
 292                         server->smbd_conn->count_send_empty);
 293                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 294                         "count_enqueue_reassembly_queue: %x "
 295                         "count_dequeue_reassembly_queue: %x "
 296                         "fragment_reassembly_remaining: %x "
 297                         "reassembly_data_length: %x "
 298                         "reassembly_queue_length: %x",
 299                         server->smbd_conn->count_reassembly_queue,
 300                         server->smbd_conn->count_enqueue_reassembly_queue,
 301                         server->smbd_conn->count_dequeue_reassembly_queue,
 302                         server->smbd_conn->fragment_reassembly_remaining,
 303                         server->smbd_conn->reassembly_data_length,
 304                         server->smbd_conn->reassembly_queue_length);
 305                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 306                         "receive_credits: %x receive_credit_target: %x",
 307                         atomic_read(&server->smbd_conn->send_credits),
 308                         atomic_read(&server->smbd_conn->receive_credits),
 309                         server->smbd_conn->receive_credit_target);
 310                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 311                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 312                         atomic_read(&server->smbd_conn->send_pending),
 313                         atomic_read(&server->smbd_conn->send_payload_pending),
 314                         server->smbd_conn->smbd_send_pending,
 315                         server->smbd_conn->smbd_recv_pending);
 316                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 317                         "count_empty_packet_queue: %x",
 318                         server->smbd_conn->count_receive_queue,
 319                         server->smbd_conn->count_empty_packet_queue);
 320                 seq_printf(m, "\nMR responder_resources: %x "
 321                         "max_frmr_depth: %x mr_type: %x",
 322                         server->smbd_conn->responder_resources,
 323                         server->smbd_conn->max_frmr_depth,
 324                         server->smbd_conn->mr_type);
 325                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 326                         atomic_read(&server->smbd_conn->mr_ready_count),
 327                         atomic_read(&server->smbd_conn->mr_used_count));
 328 skip_rdma:
 329 #endif
 330                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 331                         server->credits,  server->dialect);
 332                 if (server->sign)
 333                         seq_printf(m, " signed");
 334                 if (server->posix_ext_supported)
 335                         seq_printf(m, " posix");
 336
 337                 i++;
 338                 list_for_each(tmp2, &server->smb_ses_list) {
 339                         ses = list_entry(tmp2, struct cifs_ses,
 340                                          smb_ses_list);
 341                         if ((ses->serverDomain == NULL) ||
 342                                 (ses->serverOS == NULL) ||
 343                                 (ses->serverNOS == NULL)) {
 344                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 345                                         i, ses->serverName, ses->ses_count,
 346                                         ses->capabilities, ses->status);
 347                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 348                                         seq_printf(m, "Guest\t");
 349                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 350                                         seq_printf(m, "Anonymous\t");
 351                         } else {
 352                                 seq_printf(m,
 353                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 354                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 355                                     " session status: %d ",
 356                                 i, ses->serverName, ses->serverDomain,
 357                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 358                                 ses->capabilities, ses->status);
 359                         }
 360                         if (server->rdma)
 361                                 seq_printf(m, "RDMA\n\t");
 362                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 363                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 364                                    server->tcpStatus,
 365                                    server->reconnect_instance,
 366                                    server->srv_count,
 367                                    server->sec_mode, in_flight(server));
 368
 369 #ifdef CONFIG_CIFS_STATS2
 370                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 371                                 atomic_read(&server->in_send),
 372                                 atomic_read(&server->num_waiters));
 373 #endif
 374
 375                         seq_puts(m, "\n\tShares:");
 376                         j = 0;
 377
 378                         seq_printf(m, "\n\t%d) IPC: ", j);
 379                         if (ses->tcon_ipc)
 380                                 cifs_debug_tcon(m, ses->tcon_ipc);
 381                         else
 382                                 seq_puts(m, "none\n");
 383
 384                         list_for_each(tmp3, &ses->tcon_list) {
 385                                 tcon = list_entry(tmp3, struct cifs_tcon,
 386                                                   tcon_list);
 387                                 ++j;
 388                                 seq_printf(m, "\n\t%d) ", j);
 389                                 cifs_debug_tcon(m, tcon);
 390                         }
 391
 392                         seq_puts(m, "\n\tMIDs:\n");
 393
 394                         spin_lock(&GlobalMid_Lock);
 395                         list_for_each(tmp3, &server->pending_mid_q) {
 396                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 397                                         qhead);
 398                                 seq_printf(m, "\tState: %d com: %d pid:"
 399                                               " %d cbdata: %p mid %llu\n",
 400                                               mid_entry->mid_state,
 401                                               le16_to_cpu(mid_entry->command),
 402                                               mid_entry->pid,
 403                                               mid_entry->callback_data,
 404                                               mid_entry->mid);
 405                         }
 406                         spin_unlock(&GlobalMid_Lock);
 407
 408                         spin_lock(&ses->iface_lock);
 409                         if (ses->iface_count)
 410                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 411                                            ses->iface_count);
 412                         for (j = 0; j < ses->iface_count; j++) {
 413                                 seq_printf(m, "\t%d)", j);
 414                                 cifs_dump_iface(m, &ses->iface_list[j]);
 415                         }
 416                         spin_unlock(&ses->iface_lock);
 417                 }
 418         }
 419         spin_unlock(&cifs_tcp_ses_lock);
 420         seq_putc(m, '\n');
 421
 422         /* BB add code to dump additional info such as TCP session info now */
 423         return 0;
 424 }
 425
 426 static ssize_t cifs_stats_proc_write(struct file *file,
 427                 const char __user *buffer, size_t count, loff_t *ppos)
 428 {
 429         bool bv;
 430         int rc;
 431         struct list_head *tmp1, *tmp2, *tmp3;
 432         struct TCP_Server_Info *server;
 433         struct cifs_ses *ses;
 434         struct cifs_tcon *tcon;
 435
 436         rc = kstrtobool_from_user(buffer, count, &bv);
 437         if (rc == 0) {
 438 #ifdef CONFIG_CIFS_STATS2
 439                 int i;
 440
 441                 atomic_set(&totBufAllocCount, 0);
 442                 atomic_set(&totSmBufAllocCount, 0);
 443 #endif /* CONFIG_CIFS_STATS2 */
 444                 atomic_set(&tcpSesReconnectCount, 0);
 445                 atomic_set(&tconInfoReconnectCount, 0);
 446
 447                 spin_lock(&GlobalMid_Lock);
 448                 GlobalMaxActiveXid = 0;
 449                 GlobalCurrentXid = 0;
 450                 spin_unlock(&GlobalMid_Lock);
 451                 spin_lock(&cifs_tcp_ses_lock);
 452                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 453                         server = list_entry(tmp1, struct TCP_Server_Info,
 454                                             tcp_ses_list);
 455 #ifdef CONFIG_CIFS_STATS2
 456                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
 457                                 atomic_set(&server->smb2slowcmd[i], 0);
 458 #endif /* CONFIG_CIFS_STATS2 */
 459                         list_for_each(tmp2, &server->smb_ses_list) {
 460                                 ses = list_entry(tmp2, struct cifs_ses,
 461                                                  smb_ses_list);
 462                                 list_for_each(tmp3, &ses->tcon_list) {
 463                                         tcon = list_entry(tmp3,
 464                                                           struct cifs_tcon,
 465                                                           tcon_list);
 466                                         atomic_set(&tcon->num_smbs_sent, 0);
 467                                         spin_lock(&tcon->stat_lock);
 468                                         tcon->bytes_read = 0;
 469                                         tcon->bytes_written = 0;
 470                                         spin_unlock(&tcon->stat_lock);
 471                                         if (server->ops->clear_stats)
 472                                                 server->ops->clear_stats(tcon);
 473                                 }
 474                         }
 475                 }
 476                 spin_unlock(&cifs_tcp_ses_lock);
 477         } else {
 478                 return rc;
 479         }
 480
 481         return count;
 482 }
 483
 484 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 485 {
 486         int i;
 487 #ifdef CONFIG_CIFS_STATS2
 488         int j;
 489 #endif /* STATS2 */
 490         struct list_head *tmp1, *tmp2, *tmp3;
 491         struct TCP_Server_Info *server;
 492         struct cifs_ses *ses;
 493         struct cifs_tcon *tcon;
 494
 495         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 496                         sesInfoAllocCount.counter);
 497         seq_printf(m, "Share (unique mount targets): %d\n",
 498                         tconInfoAllocCount.counter);
 499         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 500                         bufAllocCount.counter,
 501                         cifs_min_rcv + tcpSesAllocCount.counter);
 502         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 503                         smBufAllocCount.counter, cifs_min_small);
 504 #ifdef CONFIG_CIFS_STATS2
 505         seq_printf(m, "Total Large %d Small %d Allocations\n",
 506                                 atomic_read(&totBufAllocCount),
 507                                 atomic_read(&totSmBufAllocCount));
 508 #endif /* CONFIG_CIFS_STATS2 */
 509
 510         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 511         seq_printf(m,
 512                 "\n%d session %d share reconnects\n",
 513                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 514
 515         seq_printf(m,
 516                 "Total vfs operations: %d maximum at one time: %d\n",
 517                 GlobalCurrentXid, GlobalMaxActiveXid);
 518
 519         i = 0;
 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 #ifdef CONFIG_CIFS_STATS2
 525                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 526                         if (atomic_read(&server->smb2slowcmd[j]))
 527                                 seq_printf(m, "%d slow responses from %s for command %d\n",
 528                                         atomic_read(&server->smb2slowcmd[j]),
 529                                         server->hostname, j);
 530 #endif /* STATS2 */
 531                 list_for_each(tmp2, &server->smb_ses_list) {
 532                         ses = list_entry(tmp2, struct cifs_ses,
 533                                          smb_ses_list);
 534                         list_for_each(tmp3, &ses->tcon_list) {
 535                                 tcon = list_entry(tmp3,
 536                                                   struct cifs_tcon,
 537                                                   tcon_list);
 538                                 i++;
 539                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 540                                 if (tcon->need_reconnect)
 541                                         seq_puts(m, "\tDISCONNECTED ");
 542                                 seq_printf(m, "\nSMBs: %d",
 543                                            atomic_read(&tcon->num_smbs_sent));
 544                                 if (server->ops->print_stats)
 545                                         server->ops->print_stats(m, tcon);
 546                         }
 547                 }
 548         }
 549         spin_unlock(&cifs_tcp_ses_lock);
 550
 551         seq_putc(m, '\n');
 552         return 0;
 553 }
 554
 555 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 556 {
 557         return single_open(file, cifs_stats_proc_show, NULL);
 558 }
 559
 560 static const struct file_operations cifs_stats_proc_fops = {
 561         .open           = cifs_stats_proc_open,
 562         .read           = seq_read,
 563         .llseek         = seq_lseek,
 564         .release        = single_release,
 565         .write          = cifs_stats_proc_write,
 566 };
 567
 568 #ifdef CONFIG_CIFS_SMB_DIRECT
 569 #define PROC_FILE_DEFINE(name) \
 570 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 571         size_t count, loff_t *ppos) \
 572 { \
 573         int rc; \
 574         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 575         if (rc) \
 576                 return rc; \
 577         return count; \
 578 } \
 579 static int name##_proc_show(struct seq_file *m, void *v) \
 580 { \
 581         seq_printf(m, "%d\n", name ); \
 582         return 0; \
 583 } \
 584 static int name##_open(struct inode *inode, struct file *file) \
 585 { \
 586         return single_open(file, name##_proc_show, NULL); \
 587 } \
 588 \
 589 static const struct file_operations cifs_##name##_proc_fops = { \
 590         .open           = name##_open, \
 591         .read           = seq_read, \
 592         .llseek         = seq_lseek, \
 593         .release        = single_release, \
 594         .write          = name##_write, \
 595 }
 596
 597 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 598 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 599 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 600 PROC_FILE_DEFINE(smbd_max_receive_size);
 601 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 602 PROC_FILE_DEFINE(smbd_max_send_size);
 603 PROC_FILE_DEFINE(smbd_send_credit_target);
 604 PROC_FILE_DEFINE(smbd_receive_credit_max);
 605 #endif
 606
 607 static struct proc_dir_entry *proc_fs_cifs;
 608 static const struct file_operations cifsFYI_proc_fops;
 609 static const struct file_operations cifs_lookup_cache_proc_fops;
 610 static const struct file_operations traceSMB_proc_fops;
 611 static const struct file_operations cifs_security_flags_proc_fops;
 612 static const struct file_operations cifs_linux_ext_proc_fops;
 613
 614 void
 615 cifs_proc_init(void)
 616 {
 617         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 618         if (proc_fs_cifs == NULL)
 619                 return;
 620
 621         proc_create_single("DebugData", 0, proc_fs_cifs,
 622                         cifs_debug_data_proc_show);
 623
 624         proc_create_single("open_files", 0400, proc_fs_cifs,
 625                         cifs_debug_files_proc_show);
 626
 627         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 628         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 629         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 630         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 631                     &cifs_linux_ext_proc_fops);
 632         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 633                     &cifs_security_flags_proc_fops);
 634         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 635                     &cifs_lookup_cache_proc_fops);
 636
 637 #ifdef CONFIG_CIFS_DFS_UPCALL
 638         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops);
 639 #endif
 640
 641 #ifdef CONFIG_CIFS_SMB_DIRECT
 642         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 643                 &cifs_rdma_readwrite_threshold_proc_fops);
 644         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 645                 &cifs_smbd_max_frmr_depth_proc_fops);
 646         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 647                 &cifs_smbd_keep_alive_interval_proc_fops);
 648         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 649                 &cifs_smbd_max_receive_size_proc_fops);
 650         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 651                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 652         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 653                 &cifs_smbd_max_send_size_proc_fops);
 654         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 655                 &cifs_smbd_send_credit_target_proc_fops);
 656         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 657                 &cifs_smbd_receive_credit_max_proc_fops);
 658 #endif
 659 }
 660
 661 void
 662 cifs_proc_clean(void)
 663 {
 664         if (proc_fs_cifs == NULL)
 665                 return;
 666
 667         remove_proc_entry("DebugData", proc_fs_cifs);
 668         remove_proc_entry("open_files", proc_fs_cifs);
 669         remove_proc_entry("cifsFYI", proc_fs_cifs);
 670         remove_proc_entry("traceSMB", proc_fs_cifs);
 671         remove_proc_entry("Stats", proc_fs_cifs);
 672         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 673         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 674         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 675
 676 #ifdef CONFIG_CIFS_DFS_UPCALL
 677         remove_proc_entry("dfscache", proc_fs_cifs);
 678 #endif
 679 #ifdef CONFIG_CIFS_SMB_DIRECT
 680         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 681         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 682         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 683         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 684         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 685         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 686         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 687         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 688 #endif
 689         remove_proc_entry("fs/cifs", NULL);
 690 }
 691
 692 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 693 {
 694         seq_printf(m, "%d\n", cifsFYI);
 695         return 0;
 696 }
 697
 698 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 699 {
 700         return single_open(file, cifsFYI_proc_show, NULL);
 701 }
 702
 703 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 704                 size_t count, loff_t *ppos)
 705 {
 706         char c[2] = { '\0' };
 707         bool bv;
 708         int rc;
 709
 710         rc = get_user(c[0], buffer);
 711         if (rc)
 712                 return rc;
 713         if (strtobool(c, &bv) == 0)
 714                 cifsFYI = bv;
 715         else if ((c[0] > '1') && (c[0] <= '9'))
 716                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 717         else
 718                 return -EINVAL;
 719
 720         return count;
 721 }
 722
 723 static const struct file_operations cifsFYI_proc_fops = {
 724         .open           = cifsFYI_proc_open,
 725         .read           = seq_read,
 726         .llseek         = seq_lseek,
 727         .release        = single_release,
 728         .write          = cifsFYI_proc_write,
 729 };
 730
 731 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 732 {
 733         seq_printf(m, "%d\n", linuxExtEnabled);
 734         return 0;
 735 }
 736
 737 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 738 {
 739         return single_open(file, cifs_linux_ext_proc_show, NULL);
 740 }
 741
 742 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 743                 const char __user *buffer, size_t count, loff_t *ppos)
 744 {
 745         int rc;
 746
 747         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 748         if (rc)
 749                 return rc;
 750
 751         return count;
 752 }
 753
 754 static const struct file_operations cifs_linux_ext_proc_fops = {
 755         .open           = cifs_linux_ext_proc_open,
 756         .read           = seq_read,
 757         .llseek         = seq_lseek,
 758         .release        = single_release,
 759         .write          = cifs_linux_ext_proc_write,
 760 };
 761
 762 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 763 {
 764         seq_printf(m, "%d\n", lookupCacheEnabled);
 765         return 0;
 766 }
 767
 768 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 769 {
 770         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 771 }
 772
 773 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 774                 const char __user *buffer, size_t count, loff_t *ppos)
 775 {
 776         int rc;
 777
 778         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 779         if (rc)
 780                 return rc;
 781
 782         return count;
 783 }
 784
 785 static const struct file_operations cifs_lookup_cache_proc_fops = {
 786         .open           = cifs_lookup_cache_proc_open,
 787         .read           = seq_read,
 788         .llseek         = seq_lseek,
 789         .release        = single_release,
 790         .write          = cifs_lookup_cache_proc_write,
 791 };
 792
 793 static int traceSMB_proc_show(struct seq_file *m, void *v)
 794 {
 795         seq_printf(m, "%d\n", traceSMB);
 796         return 0;
 797 }
 798
 799 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 800 {
 801         return single_open(file, traceSMB_proc_show, NULL);
 802 }
 803
 804 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 805                 size_t count, loff_t *ppos)
 806 {
 807         int rc;
 808
 809         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 810         if (rc)
 811                 return rc;
 812
 813         return count;
 814 }
 815
 816 static const struct file_operations traceSMB_proc_fops = {
 817         .open           = traceSMB_proc_open,
 818         .read           = seq_read,
 819         .llseek         = seq_lseek,
 820         .release        = single_release,
 821         .write          = traceSMB_proc_write,
 822 };
 823
 824 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 825 {
 826         seq_printf(m, "0x%x\n", global_secflags);
 827         return 0;
 828 }
 829
 830 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 831 {
 832         return single_open(file, cifs_security_flags_proc_show, NULL);
 833 }
 834
 835 /*
 836  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 837  * flags except for the ones corresponding to the given MUST flag. If there are
 838  * multiple MUST flags, then try to prefer more secure ones.
 839  */
 840 static void
 841 cifs_security_flags_handle_must_flags(unsigned int *flags)
 842 {
 843         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 844
 845         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 846                 *flags = CIFSSEC_MUST_KRB5;
 847         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 848                 *flags = CIFSSEC_MUST_NTLMSSP;
 849         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 850                 *flags = CIFSSEC_MUST_NTLMV2;
 851         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 852                 *flags = CIFSSEC_MUST_NTLM;
 853         else if (CIFSSEC_MUST_LANMAN &&
 854                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 855                 *flags = CIFSSEC_MUST_LANMAN;
 856         else if (CIFSSEC_MUST_PLNTXT &&
 857                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 858                 *flags = CIFSSEC_MUST_PLNTXT;
 859
 860         *flags |= signflags;
 861 }
 862
 863 static ssize_t cifs_security_flags_proc_write(struct file *file,
 864                 const char __user *buffer, size_t count, loff_t *ppos)
 865 {
 866         int rc;
 867         unsigned int flags;
 868         char flags_string[12];
 869         bool bv;
 870
 871         if ((count < 1) || (count > 11))
 872                 return -EINVAL;
 873
 874         memset(flags_string, 0, 12);
 875
 876         if (copy_from_user(flags_string, buffer, count))
 877                 return -EFAULT;
 878
 879         if (count < 3) {
 880                 /* single char or single char followed by null */
 881                 if (strtobool(flags_string, &bv) == 0) {
 882                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 883                         return count;
 884                 } else if (!isdigit(flags_string[0])) {
 885                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 886                                         flags_string);
 887                         return -EINVAL;
 888                 }
 889         }
 890
 891         /* else we have a number */
 892         rc = kstrtouint(flags_string, 0, &flags);
 893         if (rc) {
 894                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 895                                 flags_string);
 896                 return rc;
 897         }
 898
 899         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 900
 901         if (flags == 0)  {
 902                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 903                 return -EINVAL;
 904         }
 905
 906         if (flags & ~CIFSSEC_MASK) {
 907                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 908                          flags & ~CIFSSEC_MASK);
 909                 return -EINVAL;
 910         }
 911
 912         cifs_security_flags_handle_must_flags(&flags);
 913
 914         /* flags look ok - update the global security flags for cifs module */
 915         global_secflags = flags;
 916         if (global_secflags & CIFSSEC_MUST_SIGN) {
 917                 /* requiring signing implies signing is allowed */
 918                 global_secflags |= CIFSSEC_MAY_SIGN;
 919                 cifs_dbg(FYI, "packet signing now required\n");
 920         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 921                 cifs_dbg(FYI, "packet signing disabled\n");
 922         }
 923         /* BB should we turn on MAY flags for other MUST options? */
 924         return count;
 925 }
 926
 927 static const struct file_operations cifs_security_flags_proc_fops = {
 928         .open           = cifs_security_flags_proc_open,
 929         .read           = seq_read,
 930         .llseek         = seq_lseek,
 931         .release        = single_release,
 932         .write          = cifs_security_flags_proc_write,
 933 };
 934 #else
 935 inline void cifs_proc_init(void)
 936 {
 937 }
 938
 939 inline void cifs_proc_clean(void)
 940 {
 941 }
 942 #endif /* PROC_FS */