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_SMB_DIRECT
  34 #include "smbdirect.h"
  35 #endif
  36
  37 void
  38 cifs_dump_mem(char *label, void *data, int length)
  39 {
  40         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  41         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  42                        data, length, true);
  43 }
  44
  45 #ifdef CONFIG_CIFS_DEBUG
  46 void cifs_vfs_err(const char *fmt, ...)
  47 {
  48         struct va_format vaf;
  49         va_list args;
  50
  51         va_start(args, fmt);
  52
  53         vaf.fmt = fmt;
  54         vaf.va = &args;
  55
  56         pr_err_ratelimited("CIFS VFS: %pV", &vaf);
  57
  58         va_end(args);
  59 }
  60 #endif
  61
  62 void cifs_dump_detail(void *buf)
  63 {
  64 #ifdef CONFIG_CIFS_DEBUG2
  65         struct smb_hdr *smb = (struct smb_hdr *)buf;
  66
  67         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  68                  smb->Command, smb->Status.CifsError,
  69                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  70         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smbCalcSize(smb));
  71 #endif /* CONFIG_CIFS_DEBUG2 */
  72 }
  73
  74 void cifs_dump_mids(struct TCP_Server_Info *server)
  75 {
  76 #ifdef CONFIG_CIFS_DEBUG2
  77         struct list_head *tmp;
  78         struct mid_q_entry *mid_entry;
  79
  80         if (server == NULL)
  81                 return;
  82
  83         cifs_dbg(VFS, "Dump pending requests:\n");
  84         spin_lock(&GlobalMid_Lock);
  85         list_for_each(tmp, &server->pending_mid_q) {
  86                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  87                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  88                          mid_entry->mid_state,
  89                          le16_to_cpu(mid_entry->command),
  90                          mid_entry->pid,
  91                          mid_entry->callback_data,
  92                          mid_entry->mid);
  93 #ifdef CONFIG_CIFS_STATS2
  94                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  95                          mid_entry->large_buf,
  96                          mid_entry->resp_buf,
  97                          mid_entry->when_received,
  98                          jiffies);
  99 #endif /* STATS2 */
 100                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
 101                          mid_entry->multiRsp, mid_entry->multiEnd);
 102                 if (mid_entry->resp_buf) {
 103                         cifs_dump_detail(mid_entry->resp_buf);
 104                         cifs_dump_mem("existing buf: ",
 105                                 mid_entry->resp_buf, 62);
 106                 }
 107         }
 108         spin_unlock(&GlobalMid_Lock);
 109 #endif /* CONFIG_CIFS_DEBUG2 */
 110 }
 111
 112 #ifdef CONFIG_PROC_FS
 113 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
 114 {
 115         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 116
 117         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
 118         if (tcon->nativeFileSystem)
 119                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
 120         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
 121                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 122                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 123                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 124                    tcon->tidStatus);
 125         if (dev_type == FILE_DEVICE_DISK)
 126                 seq_puts(m, " type: DISK ");
 127         else if (dev_type == FILE_DEVICE_CD_ROM)
 128                 seq_puts(m, " type: CDROM ");
 129         else
 130                 seq_printf(m, " type: %d ", dev_type);
 131         if (tcon->seal)
 132                 seq_printf(m, " Encrypted");
 133         if (tcon->unix_ext)
 134                 seq_printf(m, " POSIX Extensions");
 135         if (tcon->ses->server->ops->dump_share_caps)
 136                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 137
 138         if (tcon->need_reconnect)
 139                 seq_puts(m, "\tDISCONNECTED ");
 140         seq_putc(m, '\n');
 141 }
 142
 143 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 144 {
 145         struct list_head *tmp1, *tmp2, *tmp3;
 146         struct mid_q_entry *mid_entry;
 147         struct TCP_Server_Info *server;
 148         struct cifs_ses *ses;
 149         struct cifs_tcon *tcon;
 150         int i, j;
 151
 152         seq_puts(m,
 153                     "Display Internal CIFS Data Structures for Debugging\n"
 154                     "---------------------------------------------------\n");
 155         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 156         seq_printf(m, "Features:");
 157 #ifdef CONFIG_CIFS_DFS_UPCALL
 158         seq_printf(m, " dfs");
 159 #endif
 160 #ifdef CONFIG_CIFS_FSCACHE
 161         seq_printf(m, " fscache");
 162 #endif
 163 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 164         seq_printf(m, " lanman");
 165 #endif
 166 #ifdef CONFIG_CIFS_POSIX
 167         seq_printf(m, " posix");
 168 #endif
 169 #ifdef CONFIG_CIFS_UPCALL
 170         seq_printf(m, " spnego");
 171 #endif
 172 #ifdef CONFIG_CIFS_XATTR
 173         seq_printf(m, " xattr");
 174 #endif
 175 #ifdef CONFIG_CIFS_ACL
 176         seq_printf(m, " acl");
 177 #endif
 178         seq_putc(m, '\n');
 179         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 180         seq_printf(m, "Servers:");
 181
 182         i = 0;
 183         spin_lock(&cifs_tcp_ses_lock);
 184         list_for_each(tmp1, &cifs_tcp_ses_list) {
 185                 server = list_entry(tmp1, struct TCP_Server_Info,
 186                                     tcp_ses_list);
 187
 188 #ifdef CONFIG_CIFS_SMB_DIRECT
 189                 if (!server->rdma)
 190                         goto skip_rdma;
 191
 192                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 193                         "transport status: %x",
 194                         server->smbd_conn->protocol,
 195                         server->smbd_conn->transport_status);
 196                 seq_printf(m, "\nConn receive_credit_max: %x "
 197                         "send_credit_target: %x max_send_size: %x",
 198                         server->smbd_conn->receive_credit_max,
 199                         server->smbd_conn->send_credit_target,
 200                         server->smbd_conn->max_send_size);
 201                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 202                         "max_fragmented_send_size: %x max_receive_size:%x",
 203                         server->smbd_conn->max_fragmented_recv_size,
 204                         server->smbd_conn->max_fragmented_send_size,
 205                         server->smbd_conn->max_receive_size);
 206                 seq_printf(m, "\nConn keep_alive_interval: %x "
 207                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 208                         server->smbd_conn->keep_alive_interval,
 209                         server->smbd_conn->max_readwrite_size,
 210                         server->smbd_conn->rdma_readwrite_threshold);
 211                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 212                         "count_put_receive_buffer: %x count_send_empty: %x",
 213                         server->smbd_conn->count_get_receive_buffer,
 214                         server->smbd_conn->count_put_receive_buffer,
 215                         server->smbd_conn->count_send_empty);
 216                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 217                         "count_enqueue_reassembly_queue: %x "
 218                         "count_dequeue_reassembly_queue: %x "
 219                         "fragment_reassembly_remaining: %x "
 220                         "reassembly_data_length: %x "
 221                         "reassembly_queue_length: %x",
 222                         server->smbd_conn->count_reassembly_queue,
 223                         server->smbd_conn->count_enqueue_reassembly_queue,
 224                         server->smbd_conn->count_dequeue_reassembly_queue,
 225                         server->smbd_conn->fragment_reassembly_remaining,
 226                         server->smbd_conn->reassembly_data_length,
 227                         server->smbd_conn->reassembly_queue_length);
 228                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 229                         "receive_credits: %x receive_credit_target: %x",
 230                         atomic_read(&server->smbd_conn->send_credits),
 231                         atomic_read(&server->smbd_conn->receive_credits),
 232                         server->smbd_conn->receive_credit_target);
 233                 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
 234                         " %x smbd_send_pending: %x smbd_recv_pending: %x",
 235                         atomic_read(&server->smbd_conn->send_pending),
 236                         atomic_read(&server->smbd_conn->send_payload_pending),
 237                         server->smbd_conn->smbd_send_pending,
 238                         server->smbd_conn->smbd_recv_pending);
 239                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 240                         "count_empty_packet_queue: %x",
 241                         server->smbd_conn->count_receive_queue,
 242                         server->smbd_conn->count_empty_packet_queue);
 243                 seq_printf(m, "\nMR responder_resources: %x "
 244                         "max_frmr_depth: %x mr_type: %x",
 245                         server->smbd_conn->responder_resources,
 246                         server->smbd_conn->max_frmr_depth,
 247                         server->smbd_conn->mr_type);
 248                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 249                         atomic_read(&server->smbd_conn->mr_ready_count),
 250                         atomic_read(&server->smbd_conn->mr_used_count));
 251 skip_rdma:
 252 #endif
 253                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 254                         server->credits,  server->dialect);
 255                 if (server->sign)
 256                         seq_printf(m, " signed");
 257                 i++;
 258                 list_for_each(tmp2, &server->smb_ses_list) {
 259                         ses = list_entry(tmp2, struct cifs_ses,
 260                                          smb_ses_list);
 261                         if ((ses->serverDomain == NULL) ||
 262                                 (ses->serverOS == NULL) ||
 263                                 (ses->serverNOS == NULL)) {
 264                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
 265                                         i, ses->serverName, ses->ses_count,
 266                                         ses->capabilities, ses->status);
 267                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 268                                         seq_printf(m, "Guest\t");
 269                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 270                                         seq_printf(m, "Anonymous\t");
 271                         } else {
 272                                 seq_printf(m,
 273                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 274                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 275                                     " session status: %d\t",
 276                                 i, ses->serverName, ses->serverDomain,
 277                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 278                                 ses->capabilities, ses->status);
 279                         }
 280                         if (server->rdma)
 281                                 seq_printf(m, "RDMA\n\t");
 282                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 283                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 284                                    server->tcpStatus, server->srv_count,
 285                                    server->sec_mode, in_flight(server));
 286
 287 #ifdef CONFIG_CIFS_STATS2
 288                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 289                                 atomic_read(&server->in_send),
 290                                 atomic_read(&server->num_waiters));
 291 #endif
 292
 293                         seq_puts(m, "\n\tShares:");
 294                         j = 0;
 295
 296                         seq_printf(m, "\n\t%d) IPC: ", j);
 297                         if (ses->tcon_ipc)
 298                                 cifs_debug_tcon(m, ses->tcon_ipc);
 299                         else
 300                                 seq_puts(m, "none\n");
 301
 302                         list_for_each(tmp3, &ses->tcon_list) {
 303                                 tcon = list_entry(tmp3, struct cifs_tcon,
 304                                                   tcon_list);
 305                                 ++j;
 306                                 seq_printf(m, "\n\t%d) ", j);
 307                                 cifs_debug_tcon(m, tcon);
 308                         }
 309
 310                         seq_puts(m, "\n\tMIDs:\n");
 311
 312                         spin_lock(&GlobalMid_Lock);
 313                         list_for_each(tmp3, &server->pending_mid_q) {
 314                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 315                                         qhead);
 316                                 seq_printf(m, "\tState: %d com: %d pid:"
 317                                               " %d cbdata: %p mid %llu\n",
 318                                               mid_entry->mid_state,
 319                                               le16_to_cpu(mid_entry->command),
 320                                               mid_entry->pid,
 321                                               mid_entry->callback_data,
 322                                               mid_entry->mid);
 323                         }
 324                         spin_unlock(&GlobalMid_Lock);
 325                 }
 326         }
 327         spin_unlock(&cifs_tcp_ses_lock);
 328         seq_putc(m, '\n');
 329
 330         /* BB add code to dump additional info such as TCP session info now */
 331         return 0;
 332 }
 333
 334 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
 335 {
 336         return single_open(file, cifs_debug_data_proc_show, NULL);
 337 }
 338
 339 static const struct file_operations cifs_debug_data_proc_fops = {
 340         .open           = cifs_debug_data_proc_open,
 341         .read           = seq_read,
 342         .llseek         = seq_lseek,
 343         .release        = single_release,
 344 };
 345
 346 #ifdef CONFIG_CIFS_STATS
 347 static ssize_t cifs_stats_proc_write(struct file *file,
 348                 const char __user *buffer, size_t count, loff_t *ppos)
 349 {
 350         bool bv;
 351         int rc;
 352         struct list_head *tmp1, *tmp2, *tmp3;
 353         struct TCP_Server_Info *server;
 354         struct cifs_ses *ses;
 355         struct cifs_tcon *tcon;
 356
 357         rc = kstrtobool_from_user(buffer, count, &bv);
 358         if (rc == 0) {
 359 #ifdef CONFIG_CIFS_STATS2
 360                 atomic_set(&totBufAllocCount, 0);
 361                 atomic_set(&totSmBufAllocCount, 0);
 362 #endif /* CONFIG_CIFS_STATS2 */
 363                 spin_lock(&cifs_tcp_ses_lock);
 364                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 365                         server = list_entry(tmp1, struct TCP_Server_Info,
 366                                             tcp_ses_list);
 367                         list_for_each(tmp2, &server->smb_ses_list) {
 368                                 ses = list_entry(tmp2, struct cifs_ses,
 369                                                  smb_ses_list);
 370                                 list_for_each(tmp3, &ses->tcon_list) {
 371                                         tcon = list_entry(tmp3,
 372                                                           struct cifs_tcon,
 373                                                           tcon_list);
 374                                         atomic_set(&tcon->num_smbs_sent, 0);
 375                                         if (server->ops->clear_stats)
 376                                                 server->ops->clear_stats(tcon);
 377                                 }
 378                         }
 379                 }
 380                 spin_unlock(&cifs_tcp_ses_lock);
 381         } else {
 382                 return rc;
 383         }
 384
 385         return count;
 386 }
 387
 388 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 389 {
 390         int i;
 391         struct list_head *tmp1, *tmp2, *tmp3;
 392         struct TCP_Server_Info *server;
 393         struct cifs_ses *ses;
 394         struct cifs_tcon *tcon;
 395
 396         seq_printf(m,
 397                         "Resources in use\nCIFS Session: %d\n",
 398                         sesInfoAllocCount.counter);
 399         seq_printf(m, "Share (unique mount targets): %d\n",
 400                         tconInfoAllocCount.counter);
 401         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 402                         bufAllocCount.counter,
 403                         cifs_min_rcv + tcpSesAllocCount.counter);
 404         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 405                         smBufAllocCount.counter, cifs_min_small);
 406 #ifdef CONFIG_CIFS_STATS2
 407         seq_printf(m, "Total Large %d Small %d Allocations\n",
 408                                 atomic_read(&totBufAllocCount),
 409                                 atomic_read(&totSmBufAllocCount));
 410 #endif /* CONFIG_CIFS_STATS2 */
 411
 412         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 413         seq_printf(m,
 414                 "\n%d session %d share reconnects\n",
 415                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 416
 417         seq_printf(m,
 418                 "Total vfs operations: %d maximum at one time: %d\n",
 419                 GlobalCurrentXid, GlobalMaxActiveXid);
 420
 421         i = 0;
 422         spin_lock(&cifs_tcp_ses_lock);
 423         list_for_each(tmp1, &cifs_tcp_ses_list) {
 424                 server = list_entry(tmp1, struct TCP_Server_Info,
 425                                     tcp_ses_list);
 426                 list_for_each(tmp2, &server->smb_ses_list) {
 427                         ses = list_entry(tmp2, struct cifs_ses,
 428                                          smb_ses_list);
 429                         list_for_each(tmp3, &ses->tcon_list) {
 430                                 tcon = list_entry(tmp3,
 431                                                   struct cifs_tcon,
 432                                                   tcon_list);
 433                                 i++;
 434                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 435                                 if (tcon->need_reconnect)
 436                                         seq_puts(m, "\tDISCONNECTED ");
 437                                 seq_printf(m, "\nSMBs: %d",
 438                                            atomic_read(&tcon->num_smbs_sent));
 439                                 if (server->ops->print_stats)
 440                                         server->ops->print_stats(m, tcon);
 441                         }
 442                 }
 443         }
 444         spin_unlock(&cifs_tcp_ses_lock);
 445
 446         seq_putc(m, '\n');
 447         return 0;
 448 }
 449
 450 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 451 {
 452         return single_open(file, cifs_stats_proc_show, NULL);
 453 }
 454
 455 static const struct file_operations cifs_stats_proc_fops = {
 456         .open           = cifs_stats_proc_open,
 457         .read           = seq_read,
 458         .llseek         = seq_lseek,
 459         .release        = single_release,
 460         .write          = cifs_stats_proc_write,
 461 };
 462 #endif /* STATS */
 463
 464 #ifdef CONFIG_CIFS_SMB_DIRECT
 465 #define PROC_FILE_DEFINE(name) \
 466 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 467         size_t count, loff_t *ppos) \
 468 { \
 469         int rc; \
 470         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 471         if (rc) \
 472                 return rc; \
 473         return count; \
 474 } \
 475 static int name##_proc_show(struct seq_file *m, void *v) \
 476 { \
 477         seq_printf(m, "%d\n", name ); \
 478         return 0; \
 479 } \
 480 static int name##_open(struct inode *inode, struct file *file) \
 481 { \
 482         return single_open(file, name##_proc_show, NULL); \
 483 } \
 484 \
 485 static const struct file_operations cifs_##name##_proc_fops = { \
 486         .open           = name##_open, \
 487         .read           = seq_read, \
 488         .llseek         = seq_lseek, \
 489         .release        = single_release, \
 490         .write          = name##_write, \
 491 }
 492
 493 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 494 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 495 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 496 PROC_FILE_DEFINE(smbd_max_receive_size);
 497 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 498 PROC_FILE_DEFINE(smbd_max_send_size);
 499 PROC_FILE_DEFINE(smbd_send_credit_target);
 500 PROC_FILE_DEFINE(smbd_receive_credit_max);
 501 #endif
 502
 503 static struct proc_dir_entry *proc_fs_cifs;
 504 static const struct file_operations cifsFYI_proc_fops;
 505 static const struct file_operations cifs_lookup_cache_proc_fops;
 506 static const struct file_operations traceSMB_proc_fops;
 507 static const struct file_operations cifs_security_flags_proc_fops;
 508 static const struct file_operations cifs_linux_ext_proc_fops;
 509
 510 void
 511 cifs_proc_init(void)
 512 {
 513         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 514         if (proc_fs_cifs == NULL)
 515                 return;
 516
 517         proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
 518
 519 #ifdef CONFIG_CIFS_STATS
 520         proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
 521 #endif /* STATS */
 522         proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
 523         proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
 524         proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 525                     &cifs_linux_ext_proc_fops);
 526         proc_create("SecurityFlags", 0, proc_fs_cifs,
 527                     &cifs_security_flags_proc_fops);
 528         proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
 529                     &cifs_lookup_cache_proc_fops);
 530 #ifdef CONFIG_CIFS_SMB_DIRECT
 531         proc_create("rdma_readwrite_threshold", 0, proc_fs_cifs,
 532                 &cifs_rdma_readwrite_threshold_proc_fops);
 533         proc_create("smbd_max_frmr_depth", 0, proc_fs_cifs,
 534                 &cifs_smbd_max_frmr_depth_proc_fops);
 535         proc_create("smbd_keep_alive_interval", 0, proc_fs_cifs,
 536                 &cifs_smbd_keep_alive_interval_proc_fops);
 537         proc_create("smbd_max_receive_size", 0, proc_fs_cifs,
 538                 &cifs_smbd_max_receive_size_proc_fops);
 539         proc_create("smbd_max_fragmented_recv_size", 0, proc_fs_cifs,
 540                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 541         proc_create("smbd_max_send_size", 0, proc_fs_cifs,
 542                 &cifs_smbd_max_send_size_proc_fops);
 543         proc_create("smbd_send_credit_target", 0, proc_fs_cifs,
 544                 &cifs_smbd_send_credit_target_proc_fops);
 545         proc_create("smbd_receive_credit_max", 0, proc_fs_cifs,
 546                 &cifs_smbd_receive_credit_max_proc_fops);
 547 #endif
 548 }
 549
 550 void
 551 cifs_proc_clean(void)
 552 {
 553         if (proc_fs_cifs == NULL)
 554                 return;
 555
 556         remove_proc_entry("DebugData", proc_fs_cifs);
 557         remove_proc_entry("cifsFYI", proc_fs_cifs);
 558         remove_proc_entry("traceSMB", proc_fs_cifs);
 559 #ifdef CONFIG_CIFS_STATS
 560         remove_proc_entry("Stats", proc_fs_cifs);
 561 #endif
 562         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 563         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 564         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 565 #ifdef CONFIG_CIFS_SMB_DIRECT
 566         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 567         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 568         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 569         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 570         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 571         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 572         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 573         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 574 #endif
 575         remove_proc_entry("fs/cifs", NULL);
 576 }
 577
 578 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 579 {
 580         seq_printf(m, "%d\n", cifsFYI);
 581         return 0;
 582 }
 583
 584 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 585 {
 586         return single_open(file, cifsFYI_proc_show, NULL);
 587 }
 588
 589 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 590                 size_t count, loff_t *ppos)
 591 {
 592         char c[2] = { '\0' };
 593         bool bv;
 594         int rc;
 595
 596         rc = get_user(c[0], buffer);
 597         if (rc)
 598                 return rc;
 599         if (strtobool(c, &bv) == 0)
 600                 cifsFYI = bv;
 601         else if ((c[0] > '1') && (c[0] <= '9'))
 602                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 603
 604         return count;
 605 }
 606
 607 static const struct file_operations cifsFYI_proc_fops = {
 608         .open           = cifsFYI_proc_open,
 609         .read           = seq_read,
 610         .llseek         = seq_lseek,
 611         .release        = single_release,
 612         .write          = cifsFYI_proc_write,
 613 };
 614
 615 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 616 {
 617         seq_printf(m, "%d\n", linuxExtEnabled);
 618         return 0;
 619 }
 620
 621 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 622 {
 623         return single_open(file, cifs_linux_ext_proc_show, NULL);
 624 }
 625
 626 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 627                 const char __user *buffer, size_t count, loff_t *ppos)
 628 {
 629         int rc;
 630
 631         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 632         if (rc)
 633                 return rc;
 634
 635         return count;
 636 }
 637
 638 static const struct file_operations cifs_linux_ext_proc_fops = {
 639         .open           = cifs_linux_ext_proc_open,
 640         .read           = seq_read,
 641         .llseek         = seq_lseek,
 642         .release        = single_release,
 643         .write          = cifs_linux_ext_proc_write,
 644 };
 645
 646 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 647 {
 648         seq_printf(m, "%d\n", lookupCacheEnabled);
 649         return 0;
 650 }
 651
 652 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 653 {
 654         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 655 }
 656
 657 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 658                 const char __user *buffer, size_t count, loff_t *ppos)
 659 {
 660         int rc;
 661
 662         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 663         if (rc)
 664                 return rc;
 665
 666         return count;
 667 }
 668
 669 static const struct file_operations cifs_lookup_cache_proc_fops = {
 670         .open           = cifs_lookup_cache_proc_open,
 671         .read           = seq_read,
 672         .llseek         = seq_lseek,
 673         .release        = single_release,
 674         .write          = cifs_lookup_cache_proc_write,
 675 };
 676
 677 static int traceSMB_proc_show(struct seq_file *m, void *v)
 678 {
 679         seq_printf(m, "%d\n", traceSMB);
 680         return 0;
 681 }
 682
 683 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 684 {
 685         return single_open(file, traceSMB_proc_show, NULL);
 686 }
 687
 688 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 689                 size_t count, loff_t *ppos)
 690 {
 691         int rc;
 692
 693         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 694         if (rc)
 695                 return rc;
 696
 697         return count;
 698 }
 699
 700 static const struct file_operations traceSMB_proc_fops = {
 701         .open           = traceSMB_proc_open,
 702         .read           = seq_read,
 703         .llseek         = seq_lseek,
 704         .release        = single_release,
 705         .write          = traceSMB_proc_write,
 706 };
 707
 708 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 709 {
 710         seq_printf(m, "0x%x\n", global_secflags);
 711         return 0;
 712 }
 713
 714 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 715 {
 716         return single_open(file, cifs_security_flags_proc_show, NULL);
 717 }
 718
 719 /*
 720  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 721  * flags except for the ones corresponding to the given MUST flag. If there are
 722  * multiple MUST flags, then try to prefer more secure ones.
 723  */
 724 static void
 725 cifs_security_flags_handle_must_flags(unsigned int *flags)
 726 {
 727         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 728
 729         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 730                 *flags = CIFSSEC_MUST_KRB5;
 731         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 732                 *flags = CIFSSEC_MUST_NTLMSSP;
 733         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 734                 *flags = CIFSSEC_MUST_NTLMV2;
 735         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 736                 *flags = CIFSSEC_MUST_NTLM;
 737         else if (CIFSSEC_MUST_LANMAN &&
 738                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 739                 *flags = CIFSSEC_MUST_LANMAN;
 740         else if (CIFSSEC_MUST_PLNTXT &&
 741                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 742                 *flags = CIFSSEC_MUST_PLNTXT;
 743
 744         *flags |= signflags;
 745 }
 746
 747 static ssize_t cifs_security_flags_proc_write(struct file *file,
 748                 const char __user *buffer, size_t count, loff_t *ppos)
 749 {
 750         int rc;
 751         unsigned int flags;
 752         char flags_string[12];
 753         bool bv;
 754
 755         if ((count < 1) || (count > 11))
 756                 return -EINVAL;
 757
 758         memset(flags_string, 0, 12);
 759
 760         if (copy_from_user(flags_string, buffer, count))
 761                 return -EFAULT;
 762
 763         if (count < 3) {
 764                 /* single char or single char followed by null */
 765                 if (strtobool(flags_string, &bv) == 0) {
 766                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 767                         return count;
 768                 } else if (!isdigit(flags_string[0])) {
 769                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 770                                         flags_string);
 771                         return -EINVAL;
 772                 }
 773         }
 774
 775         /* else we have a number */
 776         rc = kstrtouint(flags_string, 0, &flags);
 777         if (rc) {
 778                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 779                                 flags_string);
 780                 return rc;
 781         }
 782
 783         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 784
 785         if (flags == 0)  {
 786                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 787                 return -EINVAL;
 788         }
 789
 790         if (flags & ~CIFSSEC_MASK) {
 791                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 792                          flags & ~CIFSSEC_MASK);
 793                 return -EINVAL;
 794         }
 795
 796         cifs_security_flags_handle_must_flags(&flags);
 797
 798         /* flags look ok - update the global security flags for cifs module */
 799         global_secflags = flags;
 800         if (global_secflags & CIFSSEC_MUST_SIGN) {
 801                 /* requiring signing implies signing is allowed */
 802                 global_secflags |= CIFSSEC_MAY_SIGN;
 803                 cifs_dbg(FYI, "packet signing now required\n");
 804         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 805                 cifs_dbg(FYI, "packet signing disabled\n");
 806         }
 807         /* BB should we turn on MAY flags for other MUST options? */
 808         return count;
 809 }
 810
 811 static const struct file_operations cifs_security_flags_proc_fops = {
 812         .open           = cifs_security_flags_proc_open,
 813         .read           = seq_read,
 814         .llseek         = seq_lseek,
 815         .release        = single_release,
 816         .write          = cifs_security_flags_proc_write,
 817 };
 818 #else
 819 inline void cifs_proc_init(void)
 820 {
 821 }
 822
 823 inline void cifs_proc_clean(void)
 824 {
 825 }
 826 #endif /* PROC_FS */