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 <asm/uaccess.h>
  28 #include "cifspdu.h"
  29 #include "cifsglob.h"
  30 #include "cifsproto.h"
  31 #include "cifs_debug.h"
  32 #include "cifsfs.h"
  33
  34 void
  35 cifs_dump_mem(char *label, void *data, int length)
  36 {
  37         int i, j;
  38         int *intptr = data;
  39         char *charptr = data;
  40         char buf[10], line[80];
  41
  42         printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n",
  43                 label, length, data);
  44         for (i = 0; i < length; i += 16) {
  45                 line[0] = 0;
  46                 for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
  47                         sprintf(buf, " %08x", intptr[i / 4 + j]);
  48                         strcat(line, buf);
  49                 }
  50                 buf[0] = ' ';
  51                 buf[2] = 0;
  52                 for (j = 0; (j < 16) && (i + j < length); j++) {
  53                         buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
  54                         strcat(line, buf);
  55                 }
  56                 printk(KERN_DEBUG "%s\n", line);
  57         }
  58 }
  59
  60 #ifdef CONFIG_CIFS_DEBUG2
  61 void cifs_dump_detail(struct smb_hdr *smb)
  62 {
  63         cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",
  64                   smb->Command, smb->Status.CifsError,
  65                   smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  66         cERROR(1, "smb buf %p len %d", smb, smbCalcSize(smb));
  67 }
  68
  69
  70 void cifs_dump_mids(struct TCP_Server_Info *server)
  71 {
  72         struct list_head *tmp;
  73         struct mid_q_entry *mid_entry;
  74
  75         if (server == NULL)
  76                 return;
  77
  78         cERROR(1, "Dump pending requests:");
  79         spin_lock(&GlobalMid_Lock);
  80         list_for_each(tmp, &server->pending_mid_q) {
  81                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  82                 cERROR(1, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %d",
  83                         mid_entry->midState,
  84                         (int)mid_entry->command,
  85                         mid_entry->pid,
  86                         mid_entry->callback_data,
  87                         mid_entry->mid);
  88 #ifdef CONFIG_CIFS_STATS2
  89                 cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",
  90                         mid_entry->largeBuf,
  91                         mid_entry->resp_buf,
  92                         mid_entry->when_received,
  93                         jiffies);
  94 #endif /* STATS2 */
  95                 cERROR(1, "IsMult: %d IsEnd: %d", mid_entry->multiRsp,
  96                           mid_entry->multiEnd);
  97                 if (mid_entry->resp_buf) {
  98                         cifs_dump_detail(mid_entry->resp_buf);
  99                         cifs_dump_mem("existing buf: ",
 100                                 mid_entry->resp_buf, 62);
 101                 }
 102         }
 103         spin_unlock(&GlobalMid_Lock);
 104 }
 105 #endif /* CONFIG_CIFS_DEBUG2 */
 106
 107 #ifdef CONFIG_PROC_FS
 108 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 109 {
 110         struct list_head *tmp1, *tmp2, *tmp3;
 111         struct mid_q_entry *mid_entry;
 112         struct TCP_Server_Info *server;
 113         struct cifs_ses *ses;
 114         struct cifs_tcon *tcon;
 115         int i, j;
 116         __u32 dev_type;
 117
 118         seq_puts(m,
 119                     "Display Internal CIFS Data Structures for Debugging\n"
 120                     "---------------------------------------------------\n");
 121         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 122         seq_printf(m, "Features:");
 123 #ifdef CONFIG_CIFS_DFS_UPCALL
 124         seq_printf(m, " dfs");
 125 #endif
 126 #ifdef CONFIG_CIFS_FSCACHE
 127         seq_printf(m, " fscache");
 128 #endif
 129 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 130         seq_printf(m, " lanman");
 131 #endif
 132 #ifdef CONFIG_CIFS_POSIX
 133         seq_printf(m, " posix");
 134 #endif
 135 #ifdef CONFIG_CIFS_UPCALL
 136         seq_printf(m, " spnego");
 137 #endif
 138 #ifdef CONFIG_CIFS_XATTR
 139         seq_printf(m, " xattr");
 140 #endif
 141 #ifdef CONFIG_CIFS_ACL
 142         seq_printf(m, " acl");
 143 #endif
 144         seq_putc(m, '\n');
 145         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 146         seq_printf(m, "Servers:");
 147
 148         i = 0;
 149         spin_lock(&cifs_tcp_ses_lock);
 150         list_for_each(tmp1, &cifs_tcp_ses_list) {
 151                 server = list_entry(tmp1, struct TCP_Server_Info,
 152                                     tcp_ses_list);
 153                 i++;
 154                 list_for_each(tmp2, &server->smb_ses_list) {
 155                         ses = list_entry(tmp2, struct cifs_ses,
 156                                          smb_ses_list);
 157                         if ((ses->serverDomain == NULL) ||
 158                                 (ses->serverOS == NULL) ||
 159                                 (ses->serverNOS == NULL)) {
 160                                 seq_printf(m, "\n%d) entry for %s not fully "
 161                                            "displayed\n\t", i, ses->serverName);
 162                         } else {
 163                                 seq_printf(m,
 164                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 165                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 166                                     " session status: %d\t",
 167                                 i, ses->serverName, ses->serverDomain,
 168                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 169                                 ses->capabilities, ses->status);
 170                         }
 171                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 172                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 173                                    server->tcpStatus, server->srv_count,
 174                                    server->sec_mode, in_flight(server));
 175
 176 #ifdef CONFIG_CIFS_STATS2
 177                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 178                                 atomic_read(&server->in_send),
 179                                 atomic_read(&server->num_waiters));
 180 #endif
 181
 182                         seq_puts(m, "\n\tShares:");
 183                         j = 0;
 184                         list_for_each(tmp3, &ses->tcon_list) {
 185                                 tcon = list_entry(tmp3, struct cifs_tcon,
 186                                                   tcon_list);
 187                                 ++j;
 188                                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 189                                 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
 190                                            tcon->treeName, tcon->tc_count);
 191                                 if (tcon->nativeFileSystem) {
 192                                         seq_printf(m, "Type: %s ",
 193                                                    tcon->nativeFileSystem);
 194                                 }
 195                                 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
 196                                         "\nPathComponentMax: %d Status: 0x%d",
 197                                         le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 198                                         le32_to_cpu(tcon->fsAttrInfo.Attributes),
 199                                         le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 200                                         tcon->tidStatus);
 201                                 if (dev_type == FILE_DEVICE_DISK)
 202                                         seq_puts(m, " type: DISK ");
 203                                 else if (dev_type == FILE_DEVICE_CD_ROM)
 204                                         seq_puts(m, " type: CDROM ");
 205                                 else
 206                                         seq_printf(m, " type: %d ", dev_type);
 207
 208                                 if (tcon->need_reconnect)
 209                                         seq_puts(m, "\tDISCONNECTED ");
 210                                 seq_putc(m, '\n');
 211                         }
 212
 213                         seq_puts(m, "\n\tMIDs:\n");
 214
 215                         spin_lock(&GlobalMid_Lock);
 216                         list_for_each(tmp3, &server->pending_mid_q) {
 217                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 218                                         qhead);
 219                                 seq_printf(m, "\tState: %d com: %d pid:"
 220                                                 " %d cbdata: %p mid %d\n",
 221                                                 mid_entry->midState,
 222                                                 (int)mid_entry->command,
 223                                                 mid_entry->pid,
 224                                                 mid_entry->callback_data,
 225                                                 mid_entry->mid);
 226                         }
 227                         spin_unlock(&GlobalMid_Lock);
 228                 }
 229         }
 230         spin_unlock(&cifs_tcp_ses_lock);
 231         seq_putc(m, '\n');
 232
 233         /* BB add code to dump additional info such as TCP session info now */
 234         return 0;
 235 }
 236
 237 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
 238 {
 239         return single_open(file, cifs_debug_data_proc_show, NULL);
 240 }
 241
 242 static const struct file_operations cifs_debug_data_proc_fops = {
 243         .owner          = THIS_MODULE,
 244         .open           = cifs_debug_data_proc_open,
 245         .read           = seq_read,
 246         .llseek         = seq_lseek,
 247         .release        = single_release,
 248 };
 249
 250 #ifdef CONFIG_CIFS_STATS
 251 static ssize_t cifs_stats_proc_write(struct file *file,
 252                 const char __user *buffer, size_t count, loff_t *ppos)
 253 {
 254         char c;
 255         int rc;
 256         struct list_head *tmp1, *tmp2, *tmp3;
 257         struct TCP_Server_Info *server;
 258         struct cifs_ses *ses;
 259         struct cifs_tcon *tcon;
 260
 261         rc = get_user(c, buffer);
 262         if (rc)
 263                 return rc;
 264
 265         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
 266 #ifdef CONFIG_CIFS_STATS2
 267                 atomic_set(&totBufAllocCount, 0);
 268                 atomic_set(&totSmBufAllocCount, 0);
 269 #endif /* CONFIG_CIFS_STATS2 */
 270                 spin_lock(&cifs_tcp_ses_lock);
 271                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 272                         server = list_entry(tmp1, struct TCP_Server_Info,
 273                                             tcp_ses_list);
 274                         list_for_each(tmp2, &server->smb_ses_list) {
 275                                 ses = list_entry(tmp2, struct cifs_ses,
 276                                                  smb_ses_list);
 277                                 list_for_each(tmp3, &ses->tcon_list) {
 278                                         tcon = list_entry(tmp3,
 279                                                           struct cifs_tcon,
 280                                                           tcon_list);
 281                                         atomic_set(&tcon->num_smbs_sent, 0);
 282                                         atomic_set(&tcon->num_writes, 0);
 283                                         atomic_set(&tcon->num_reads, 0);
 284                                         atomic_set(&tcon->num_oplock_brks, 0);
 285                                         atomic_set(&tcon->num_opens, 0);
 286                                         atomic_set(&tcon->num_posixopens, 0);
 287                                         atomic_set(&tcon->num_posixmkdirs, 0);
 288                                         atomic_set(&tcon->num_closes, 0);
 289                                         atomic_set(&tcon->num_deletes, 0);
 290                                         atomic_set(&tcon->num_mkdirs, 0);
 291                                         atomic_set(&tcon->num_rmdirs, 0);
 292                                         atomic_set(&tcon->num_renames, 0);
 293                                         atomic_set(&tcon->num_t2renames, 0);
 294                                         atomic_set(&tcon->num_ffirst, 0);
 295                                         atomic_set(&tcon->num_fnext, 0);
 296                                         atomic_set(&tcon->num_fclose, 0);
 297                                         atomic_set(&tcon->num_hardlinks, 0);
 298                                         atomic_set(&tcon->num_symlinks, 0);
 299                                         atomic_set(&tcon->num_locks, 0);
 300                                 }
 301                         }
 302                 }
 303                 spin_unlock(&cifs_tcp_ses_lock);
 304         }
 305
 306         return count;
 307 }
 308
 309 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 310 {
 311         int i;
 312         struct list_head *tmp1, *tmp2, *tmp3;
 313         struct TCP_Server_Info *server;
 314         struct cifs_ses *ses;
 315         struct cifs_tcon *tcon;
 316
 317         seq_printf(m,
 318                         "Resources in use\nCIFS Session: %d\n",
 319                         sesInfoAllocCount.counter);
 320         seq_printf(m, "Share (unique mount targets): %d\n",
 321                         tconInfoAllocCount.counter);
 322         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 323                         bufAllocCount.counter,
 324                         cifs_min_rcv + tcpSesAllocCount.counter);
 325         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 326                         smBufAllocCount.counter, cifs_min_small);
 327 #ifdef CONFIG_CIFS_STATS2
 328         seq_printf(m, "Total Large %d Small %d Allocations\n",
 329                                 atomic_read(&totBufAllocCount),
 330                                 atomic_read(&totSmBufAllocCount));
 331 #endif /* CONFIG_CIFS_STATS2 */
 332
 333         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 334         seq_printf(m,
 335                 "\n%d session %d share reconnects\n",
 336                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 337
 338         seq_printf(m,
 339                 "Total vfs operations: %d maximum at one time: %d\n",
 340                 GlobalCurrentXid, GlobalMaxActiveXid);
 341
 342         i = 0;
 343         spin_lock(&cifs_tcp_ses_lock);
 344         list_for_each(tmp1, &cifs_tcp_ses_list) {
 345                 server = list_entry(tmp1, struct TCP_Server_Info,
 346                                     tcp_ses_list);
 347                 list_for_each(tmp2, &server->smb_ses_list) {
 348                         ses = list_entry(tmp2, struct cifs_ses,
 349                                          smb_ses_list);
 350                         list_for_each(tmp3, &ses->tcon_list) {
 351                                 tcon = list_entry(tmp3,
 352                                                   struct cifs_tcon,
 353                                                   tcon_list);
 354                                 i++;
 355                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 356                                 if (tcon->need_reconnect)
 357                                         seq_puts(m, "\tDISCONNECTED ");
 358                                 seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
 359                                         atomic_read(&tcon->num_smbs_sent),
 360                                         atomic_read(&tcon->num_oplock_brks));
 361                                 seq_printf(m, "\nReads:  %d Bytes: %lld",
 362                                         atomic_read(&tcon->num_reads),
 363                                         (long long)(tcon->bytes_read));
 364                                 seq_printf(m, "\nWrites: %d Bytes: %lld",
 365                                         atomic_read(&tcon->num_writes),
 366                                         (long long)(tcon->bytes_written));
 367                                 seq_printf(m, "\nFlushes: %d",
 368                                         atomic_read(&tcon->num_flushes));
 369                                 seq_printf(m, "\nLocks: %d HardLinks: %d "
 370                                               "Symlinks: %d",
 371                                         atomic_read(&tcon->num_locks),
 372                                         atomic_read(&tcon->num_hardlinks),
 373                                         atomic_read(&tcon->num_symlinks));
 374                                 seq_printf(m, "\nOpens: %d Closes: %d "
 375                                               "Deletes: %d",
 376                                         atomic_read(&tcon->num_opens),
 377                                         atomic_read(&tcon->num_closes),
 378                                         atomic_read(&tcon->num_deletes));
 379                                 seq_printf(m, "\nPosix Opens: %d "
 380                                               "Posix Mkdirs: %d",
 381                                         atomic_read(&tcon->num_posixopens),
 382                                         atomic_read(&tcon->num_posixmkdirs));
 383                                 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
 384                                         atomic_read(&tcon->num_mkdirs),
 385                                         atomic_read(&tcon->num_rmdirs));
 386                                 seq_printf(m, "\nRenames: %d T2 Renames %d",
 387                                         atomic_read(&tcon->num_renames),
 388                                         atomic_read(&tcon->num_t2renames));
 389                                 seq_printf(m, "\nFindFirst: %d FNext %d "
 390                                               "FClose %d",
 391                                         atomic_read(&tcon->num_ffirst),
 392                                         atomic_read(&tcon->num_fnext),
 393                                         atomic_read(&tcon->num_fclose));
 394                         }
 395                 }
 396         }
 397         spin_unlock(&cifs_tcp_ses_lock);
 398
 399         seq_putc(m, '\n');
 400         return 0;
 401 }
 402
 403 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 404 {
 405         return single_open(file, cifs_stats_proc_show, NULL);
 406 }
 407
 408 static const struct file_operations cifs_stats_proc_fops = {
 409         .owner          = THIS_MODULE,
 410         .open           = cifs_stats_proc_open,
 411         .read           = seq_read,
 412         .llseek         = seq_lseek,
 413         .release        = single_release,
 414         .write          = cifs_stats_proc_write,
 415 };
 416 #endif /* STATS */
 417
 418 static struct proc_dir_entry *proc_fs_cifs;
 419 static const struct file_operations cifsFYI_proc_fops;
 420 static const struct file_operations cifs_oplock_proc_fops;
 421 static const struct file_operations cifs_lookup_cache_proc_fops;
 422 static const struct file_operations traceSMB_proc_fops;
 423 static const struct file_operations cifs_multiuser_mount_proc_fops;
 424 static const struct file_operations cifs_security_flags_proc_fops;
 425 static const struct file_operations cifs_linux_ext_proc_fops;
 426
 427 void
 428 cifs_proc_init(void)
 429 {
 430         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 431         if (proc_fs_cifs == NULL)
 432                 return;
 433
 434         proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
 435
 436 #ifdef CONFIG_CIFS_STATS
 437         proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
 438 #endif /* STATS */
 439         proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
 440         proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
 441         proc_create("OplockEnabled", 0, proc_fs_cifs, &cifs_oplock_proc_fops);
 442         proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 443                     &cifs_linux_ext_proc_fops);
 444         proc_create("MultiuserMount", 0, proc_fs_cifs,
 445                     &cifs_multiuser_mount_proc_fops);
 446         proc_create("SecurityFlags", 0, proc_fs_cifs,
 447                     &cifs_security_flags_proc_fops);
 448         proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
 449                     &cifs_lookup_cache_proc_fops);
 450 }
 451
 452 void
 453 cifs_proc_clean(void)
 454 {
 455         if (proc_fs_cifs == NULL)
 456                 return;
 457
 458         remove_proc_entry("DebugData", proc_fs_cifs);
 459         remove_proc_entry("cifsFYI", proc_fs_cifs);
 460         remove_proc_entry("traceSMB", proc_fs_cifs);
 461 #ifdef CONFIG_CIFS_STATS
 462         remove_proc_entry("Stats", proc_fs_cifs);
 463 #endif
 464         remove_proc_entry("MultiuserMount", proc_fs_cifs);
 465         remove_proc_entry("OplockEnabled", proc_fs_cifs);
 466         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 467         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 468         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 469         remove_proc_entry("fs/cifs", NULL);
 470 }
 471
 472 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 473 {
 474         seq_printf(m, "%d\n", cifsFYI);
 475         return 0;
 476 }
 477
 478 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 479 {
 480         return single_open(file, cifsFYI_proc_show, NULL);
 481 }
 482
 483 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 484                 size_t count, loff_t *ppos)
 485 {
 486         char c;
 487         int rc;
 488
 489         rc = get_user(c, buffer);
 490         if (rc)
 491                 return rc;
 492         if (c == '0' || c == 'n' || c == 'N')
 493                 cifsFYI = 0;
 494         else if (c == '1' || c == 'y' || c == 'Y')
 495                 cifsFYI = 1;
 496         else if ((c > '1') && (c <= '9'))
 497                 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
 498
 499         return count;
 500 }
 501
 502 static const struct file_operations cifsFYI_proc_fops = {
 503         .owner          = THIS_MODULE,
 504         .open           = cifsFYI_proc_open,
 505         .read           = seq_read,
 506         .llseek         = seq_lseek,
 507         .release        = single_release,
 508         .write          = cifsFYI_proc_write,
 509 };
 510
 511 static int cifs_oplock_proc_show(struct seq_file *m, void *v)
 512 {
 513         seq_printf(m, "%d\n", enable_oplocks);
 514         return 0;
 515 }
 516
 517 static int cifs_oplock_proc_open(struct inode *inode, struct file *file)
 518 {
 519         return single_open(file, cifs_oplock_proc_show, NULL);
 520 }
 521
 522 static ssize_t cifs_oplock_proc_write(struct file *file,
 523                 const char __user *buffer, size_t count, loff_t *ppos)
 524 {
 525         char c;
 526         int rc;
 527
 528         printk(KERN_WARNING "CIFS: The /proc/fs/cifs/OplockEnabled interface "
 529                "will be removed in kernel version 3.4. Please migrate to "
 530                "using the 'enable_oplocks' module parameter in cifs.ko.\n");
 531         rc = get_user(c, buffer);
 532         if (rc)
 533                 return rc;
 534         if (c == '0' || c == 'n' || c == 'N')
 535                 enable_oplocks = false;
 536         else if (c == '1' || c == 'y' || c == 'Y')
 537                 enable_oplocks = true;
 538
 539         return count;
 540 }
 541
 542 static const struct file_operations cifs_oplock_proc_fops = {
 543         .owner          = THIS_MODULE,
 544         .open           = cifs_oplock_proc_open,
 545         .read           = seq_read,
 546         .llseek         = seq_lseek,
 547         .release        = single_release,
 548         .write          = cifs_oplock_proc_write,
 549 };
 550
 551 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 552 {
 553         seq_printf(m, "%d\n", linuxExtEnabled);
 554         return 0;
 555 }
 556
 557 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 558 {
 559         return single_open(file, cifs_linux_ext_proc_show, NULL);
 560 }
 561
 562 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 563                 const char __user *buffer, size_t count, loff_t *ppos)
 564 {
 565         char c;
 566         int rc;
 567
 568         rc = get_user(c, buffer);
 569         if (rc)
 570                 return rc;
 571         if (c == '0' || c == 'n' || c == 'N')
 572                 linuxExtEnabled = 0;
 573         else if (c == '1' || c == 'y' || c == 'Y')
 574                 linuxExtEnabled = 1;
 575
 576         return count;
 577 }
 578
 579 static const struct file_operations cifs_linux_ext_proc_fops = {
 580         .owner          = THIS_MODULE,
 581         .open           = cifs_linux_ext_proc_open,
 582         .read           = seq_read,
 583         .llseek         = seq_lseek,
 584         .release        = single_release,
 585         .write          = cifs_linux_ext_proc_write,
 586 };
 587
 588 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 589 {
 590         seq_printf(m, "%d\n", lookupCacheEnabled);
 591         return 0;
 592 }
 593
 594 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 595 {
 596         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 597 }
 598
 599 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 600                 const char __user *buffer, size_t count, loff_t *ppos)
 601 {
 602         char c;
 603         int rc;
 604
 605         rc = get_user(c, buffer);
 606         if (rc)
 607                 return rc;
 608         if (c == '0' || c == 'n' || c == 'N')
 609                 lookupCacheEnabled = 0;
 610         else if (c == '1' || c == 'y' || c == 'Y')
 611                 lookupCacheEnabled = 1;
 612
 613         return count;
 614 }
 615
 616 static const struct file_operations cifs_lookup_cache_proc_fops = {
 617         .owner          = THIS_MODULE,
 618         .open           = cifs_lookup_cache_proc_open,
 619         .read           = seq_read,
 620         .llseek         = seq_lseek,
 621         .release        = single_release,
 622         .write          = cifs_lookup_cache_proc_write,
 623 };
 624
 625 static int traceSMB_proc_show(struct seq_file *m, void *v)
 626 {
 627         seq_printf(m, "%d\n", traceSMB);
 628         return 0;
 629 }
 630
 631 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 632 {
 633         return single_open(file, traceSMB_proc_show, NULL);
 634 }
 635
 636 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 637                 size_t count, loff_t *ppos)
 638 {
 639         char c;
 640         int rc;
 641
 642         rc = get_user(c, buffer);
 643         if (rc)
 644                 return rc;
 645         if (c == '0' || c == 'n' || c == 'N')
 646                 traceSMB = 0;
 647         else if (c == '1' || c == 'y' || c == 'Y')
 648                 traceSMB = 1;
 649
 650         return count;
 651 }
 652
 653 static const struct file_operations traceSMB_proc_fops = {
 654         .owner          = THIS_MODULE,
 655         .open           = traceSMB_proc_open,
 656         .read           = seq_read,
 657         .llseek         = seq_lseek,
 658         .release        = single_release,
 659         .write          = traceSMB_proc_write,
 660 };
 661
 662 static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
 663 {
 664         seq_printf(m, "%d\n", multiuser_mount);
 665         return 0;
 666 }
 667
 668 static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
 669 {
 670         return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
 671 }
 672
 673 static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
 674                 const char __user *buffer, size_t count, loff_t *ppos)
 675 {
 676         char c;
 677         int rc;
 678         static bool warned;
 679
 680         rc = get_user(c, buffer);
 681         if (rc)
 682                 return rc;
 683         if (c == '0' || c == 'n' || c == 'N')
 684                 multiuser_mount = 0;
 685         else if (c == '1' || c == 'y' || c == 'Y') {
 686                 multiuser_mount = 1;
 687                 if (!warned) {
 688                         warned = true;
 689                         printk(KERN_WARNING "CIFS VFS: The legacy multiuser "
 690                                 "mount code is scheduled to be deprecated in "
 691                                 "3.5. Please switch to using the multiuser "
 692                                 "mount option.");
 693                 }
 694         }
 695
 696         return count;
 697 }
 698
 699 static const struct file_operations cifs_multiuser_mount_proc_fops = {
 700         .owner          = THIS_MODULE,
 701         .open           = cifs_multiuser_mount_proc_open,
 702         .read           = seq_read,
 703         .llseek         = seq_lseek,
 704         .release        = single_release,
 705         .write          = cifs_multiuser_mount_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 static ssize_t cifs_security_flags_proc_write(struct file *file,
 720                 const char __user *buffer, size_t count, loff_t *ppos)
 721 {
 722         unsigned int flags;
 723         char flags_string[12];
 724         char c;
 725
 726         if ((count < 1) || (count > 11))
 727                 return -EINVAL;
 728
 729         memset(flags_string, 0, 12);
 730
 731         if (copy_from_user(flags_string, buffer, count))
 732                 return -EFAULT;
 733
 734         if (count < 3) {
 735                 /* single char or single char followed by null */
 736                 c = flags_string[0];
 737                 if (c == '0' || c == 'n' || c == 'N') {
 738                         global_secflags = CIFSSEC_DEF; /* default */
 739                         return count;
 740                 } else if (c == '1' || c == 'y' || c == 'Y') {
 741                         global_secflags = CIFSSEC_MAX;
 742                         return count;
 743                 } else if (!isdigit(c)) {
 744                         cERROR(1, "invalid flag %c", c);
 745                         return -EINVAL;
 746                 }
 747         }
 748         /* else we have a number */
 749
 750         flags = simple_strtoul(flags_string, NULL, 0);
 751
 752         cFYI(1, "sec flags 0x%x", flags);
 753
 754         if (flags <= 0)  {
 755                 cERROR(1, "invalid security flags %s", flags_string);
 756                 return -EINVAL;
 757         }
 758
 759         if (flags & ~CIFSSEC_MASK) {
 760                 cERROR(1, "attempt to set unsupported security flags 0x%x",
 761                         flags & ~CIFSSEC_MASK);
 762                 return -EINVAL;
 763         }
 764         /* flags look ok - update the global security flags for cifs module */
 765         global_secflags = flags;
 766         if (global_secflags & CIFSSEC_MUST_SIGN) {
 767                 /* requiring signing implies signing is allowed */
 768                 global_secflags |= CIFSSEC_MAY_SIGN;
 769                 cFYI(1, "packet signing now required");
 770         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 771                 cFYI(1, "packet signing disabled");
 772         }
 773         /* BB should we turn on MAY flags for other MUST options? */
 774         return count;
 775 }
 776
 777 static const struct file_operations cifs_security_flags_proc_fops = {
 778         .owner          = THIS_MODULE,
 779         .open           = cifs_security_flags_proc_open,
 780         .read           = seq_read,
 781         .llseek         = seq_lseek,
 782         .release        = single_release,
 783         .write          = cifs_security_flags_proc_write,
 784 };
 785 #else
 786 inline void cifs_proc_init(void)
 787 {
 788 }
 789
 790 inline void cifs_proc_clean(void)
 791 {
 792 }
 793 #endif /* PROC_FS */