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(void *buf)
  62 {
  63         struct smb_hdr *smb = (struct smb_hdr *)buf;
  64
  65         cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",
  66                   smb->Command, smb->Status.CifsError,
  67                   smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  68         cERROR(1, "smb buf %p len %d", smb, smbCalcSize(smb));
  69 }
  70
  71 void cifs_dump_mids(struct TCP_Server_Info *server)
  72 {
  73         struct list_head *tmp;
  74         struct mid_q_entry *mid_entry;
  75
  76         if (server == NULL)
  77                 return;
  78
  79         cERROR(1, "Dump pending requests:");
  80         spin_lock(&GlobalMid_Lock);
  81         list_for_each(tmp, &server->pending_mid_q) {
  82                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  83                 cERROR(1, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu",
  84                         mid_entry->mid_state,
  85                         le16_to_cpu(mid_entry->command),
  86                         mid_entry->pid,
  87                         mid_entry->callback_data,
  88                         mid_entry->mid);
  89 #ifdef CONFIG_CIFS_STATS2
  90                 cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",
  91                         mid_entry->large_buf,
  92                         mid_entry->resp_buf,
  93                         mid_entry->when_received,
  94                         jiffies);
  95 #endif /* STATS2 */
  96                 cERROR(1, "IsMult: %d IsEnd: %d", mid_entry->multiRsp,
  97                           mid_entry->multiEnd);
  98                 if (mid_entry->resp_buf) {
  99                         cifs_dump_detail(mid_entry->resp_buf);
 100                         cifs_dump_mem("existing buf: ",
 101                                 mid_entry->resp_buf, 62);
 102                 }
 103         }
 104         spin_unlock(&GlobalMid_Lock);
 105 }
 106 #endif /* CONFIG_CIFS_DEBUG2 */
 107
 108 #ifdef CONFIG_PROC_FS
 109 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 110 {
 111         struct list_head *tmp1, *tmp2, *tmp3;
 112         struct mid_q_entry *mid_entry;
 113         struct TCP_Server_Info *server;
 114         struct cifs_ses *ses;
 115         struct cifs_tcon *tcon;
 116         int i, j;
 117         __u32 dev_type;
 118
 119         seq_puts(m,
 120                     "Display Internal CIFS Data Structures for Debugging\n"
 121                     "---------------------------------------------------\n");
 122         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 123         seq_printf(m, "Features:");
 124 #ifdef CONFIG_CIFS_DFS_UPCALL
 125         seq_printf(m, " dfs");
 126 #endif
 127 #ifdef CONFIG_CIFS_FSCACHE
 128         seq_printf(m, " fscache");
 129 #endif
 130 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 131         seq_printf(m, " lanman");
 132 #endif
 133 #ifdef CONFIG_CIFS_POSIX
 134         seq_printf(m, " posix");
 135 #endif
 136 #ifdef CONFIG_CIFS_UPCALL
 137         seq_printf(m, " spnego");
 138 #endif
 139 #ifdef CONFIG_CIFS_XATTR
 140         seq_printf(m, " xattr");
 141 #endif
 142 #ifdef CONFIG_CIFS_ACL
 143         seq_printf(m, " acl");
 144 #endif
 145         seq_putc(m, '\n');
 146         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 147         seq_printf(m, "Servers:");
 148
 149         i = 0;
 150         spin_lock(&cifs_tcp_ses_lock);
 151         list_for_each(tmp1, &cifs_tcp_ses_list) {
 152                 server = list_entry(tmp1, struct TCP_Server_Info,
 153                                     tcp_ses_list);
 154                 i++;
 155                 list_for_each(tmp2, &server->smb_ses_list) {
 156                         ses = list_entry(tmp2, struct cifs_ses,
 157                                          smb_ses_list);
 158                         if ((ses->serverDomain == NULL) ||
 159                                 (ses->serverOS == NULL) ||
 160                                 (ses->serverNOS == NULL)) {
 161                                 seq_printf(m, "\n%d) entry for %s not fully "
 162                                            "displayed\n\t", i, ses->serverName);
 163                         } else {
 164                                 seq_printf(m,
 165                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 166                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 167                                     " session status: %d\t",
 168                                 i, ses->serverName, ses->serverDomain,
 169                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 170                                 ses->capabilities, ses->status);
 171                         }
 172                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 173                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 174                                    server->tcpStatus, server->srv_count,
 175                                    server->sec_mode, in_flight(server));
 176
 177 #ifdef CONFIG_CIFS_STATS2
 178                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 179                                 atomic_read(&server->in_send),
 180                                 atomic_read(&server->num_waiters));
 181 #endif
 182
 183                         seq_puts(m, "\n\tShares:");
 184                         j = 0;
 185                         list_for_each(tmp3, &ses->tcon_list) {
 186                                 tcon = list_entry(tmp3, struct cifs_tcon,
 187                                                   tcon_list);
 188                                 ++j;
 189                                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 190                                 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
 191                                            tcon->treeName, tcon->tc_count);
 192                                 if (tcon->nativeFileSystem) {
 193                                         seq_printf(m, "Type: %s ",
 194                                                    tcon->nativeFileSystem);
 195                                 }
 196                                 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
 197                                         "\nPathComponentMax: %d Status: 0x%d",
 198                                         le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 199                                         le32_to_cpu(tcon->fsAttrInfo.Attributes),
 200                                         le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 201                                         tcon->tidStatus);
 202                                 if (dev_type == FILE_DEVICE_DISK)
 203                                         seq_puts(m, " type: DISK ");
 204                                 else if (dev_type == FILE_DEVICE_CD_ROM)
 205                                         seq_puts(m, " type: CDROM ");
 206                                 else
 207                                         seq_printf(m, " type: %d ", dev_type);
 208
 209                                 if (tcon->need_reconnect)
 210                                         seq_puts(m, "\tDISCONNECTED ");
 211                                 seq_putc(m, '\n');
 212                         }
 213
 214                         seq_puts(m, "\n\tMIDs:\n");
 215
 216                         spin_lock(&GlobalMid_Lock);
 217                         list_for_each(tmp3, &server->pending_mid_q) {
 218                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 219                                         qhead);
 220                                 seq_printf(m, "\tState: %d com: %d pid:"
 221                                               " %d cbdata: %p mid %llu\n",
 222                                               mid_entry->mid_state,
 223                                               le16_to_cpu(mid_entry->command),
 224                                               mid_entry->pid,
 225                                               mid_entry->callback_data,
 226                                               mid_entry->mid);
 227                         }
 228                         spin_unlock(&GlobalMid_Lock);
 229                 }
 230         }
 231         spin_unlock(&cifs_tcp_ses_lock);
 232         seq_putc(m, '\n');
 233
 234         /* BB add code to dump additional info such as TCP session info now */
 235         return 0;
 236 }
 237
 238 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
 239 {
 240         return single_open(file, cifs_debug_data_proc_show, NULL);
 241 }
 242
 243 static const struct file_operations cifs_debug_data_proc_fops = {
 244         .owner          = THIS_MODULE,
 245         .open           = cifs_debug_data_proc_open,
 246         .read           = seq_read,
 247         .llseek         = seq_lseek,
 248         .release        = single_release,
 249 };
 250
 251 #ifdef CONFIG_CIFS_STATS
 252 static ssize_t cifs_stats_proc_write(struct file *file,
 253                 const char __user *buffer, size_t count, loff_t *ppos)
 254 {
 255         char c;
 256         int rc;
 257         struct list_head *tmp1, *tmp2, *tmp3;
 258         struct TCP_Server_Info *server;
 259         struct cifs_ses *ses;
 260         struct cifs_tcon *tcon;
 261
 262         rc = get_user(c, buffer);
 263         if (rc)
 264                 return rc;
 265
 266         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
 267 #ifdef CONFIG_CIFS_STATS2
 268                 atomic_set(&totBufAllocCount, 0);
 269                 atomic_set(&totSmBufAllocCount, 0);
 270 #endif /* CONFIG_CIFS_STATS2 */
 271                 spin_lock(&cifs_tcp_ses_lock);
 272                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 273                         server = list_entry(tmp1, struct TCP_Server_Info,
 274                                             tcp_ses_list);
 275                         list_for_each(tmp2, &server->smb_ses_list) {
 276                                 ses = list_entry(tmp2, struct cifs_ses,
 277                                                  smb_ses_list);
 278                                 list_for_each(tmp3, &ses->tcon_list) {
 279                                         tcon = list_entry(tmp3,
 280                                                           struct cifs_tcon,
 281                                                           tcon_list);
 282                                         atomic_set(&tcon->num_smbs_sent, 0);
 283                                         atomic_set(&tcon->num_writes, 0);
 284                                         atomic_set(&tcon->num_reads, 0);
 285                                         atomic_set(&tcon->num_oplock_brks, 0);
 286                                         atomic_set(&tcon->num_opens, 0);
 287                                         atomic_set(&tcon->num_posixopens, 0);
 288                                         atomic_set(&tcon->num_posixmkdirs, 0);
 289                                         atomic_set(&tcon->num_closes, 0);
 290                                         atomic_set(&tcon->num_deletes, 0);
 291                                         atomic_set(&tcon->num_mkdirs, 0);
 292                                         atomic_set(&tcon->num_rmdirs, 0);
 293                                         atomic_set(&tcon->num_renames, 0);
 294                                         atomic_set(&tcon->num_t2renames, 0);
 295                                         atomic_set(&tcon->num_ffirst, 0);
 296                                         atomic_set(&tcon->num_fnext, 0);
 297                                         atomic_set(&tcon->num_fclose, 0);
 298                                         atomic_set(&tcon->num_hardlinks, 0);
 299                                         atomic_set(&tcon->num_symlinks, 0);
 300                                         atomic_set(&tcon->num_locks, 0);
 301                                 }
 302                         }
 303                 }
 304                 spin_unlock(&cifs_tcp_ses_lock);
 305         }
 306
 307         return count;
 308 }
 309
 310 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 311 {
 312         int i;
 313         struct list_head *tmp1, *tmp2, *tmp3;
 314         struct TCP_Server_Info *server;
 315         struct cifs_ses *ses;
 316         struct cifs_tcon *tcon;
 317
 318         seq_printf(m,
 319                         "Resources in use\nCIFS Session: %d\n",
 320                         sesInfoAllocCount.counter);
 321         seq_printf(m, "Share (unique mount targets): %d\n",
 322                         tconInfoAllocCount.counter);
 323         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 324                         bufAllocCount.counter,
 325                         cifs_min_rcv + tcpSesAllocCount.counter);
 326         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 327                         smBufAllocCount.counter, cifs_min_small);
 328 #ifdef CONFIG_CIFS_STATS2
 329         seq_printf(m, "Total Large %d Small %d Allocations\n",
 330                                 atomic_read(&totBufAllocCount),
 331                                 atomic_read(&totSmBufAllocCount));
 332 #endif /* CONFIG_CIFS_STATS2 */
 333
 334         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 335         seq_printf(m,
 336                 "\n%d session %d share reconnects\n",
 337                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 338
 339         seq_printf(m,
 340                 "Total vfs operations: %d maximum at one time: %d\n",
 341                 GlobalCurrentXid, GlobalMaxActiveXid);
 342
 343         i = 0;
 344         spin_lock(&cifs_tcp_ses_lock);
 345         list_for_each(tmp1, &cifs_tcp_ses_list) {
 346                 server = list_entry(tmp1, struct TCP_Server_Info,
 347                                     tcp_ses_list);
 348                 list_for_each(tmp2, &server->smb_ses_list) {
 349                         ses = list_entry(tmp2, struct cifs_ses,
 350                                          smb_ses_list);
 351                         list_for_each(tmp3, &ses->tcon_list) {
 352                                 tcon = list_entry(tmp3,
 353                                                   struct cifs_tcon,
 354                                                   tcon_list);
 355                                 i++;
 356                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 357                                 if (tcon->need_reconnect)
 358                                         seq_puts(m, "\tDISCONNECTED ");
 359                                 seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
 360                                         atomic_read(&tcon->num_smbs_sent),
 361                                         atomic_read(&tcon->num_oplock_brks));
 362                                 seq_printf(m, "\nReads:  %d Bytes: %lld",
 363                                         atomic_read(&tcon->num_reads),
 364                                         (long long)(tcon->bytes_read));
 365                                 seq_printf(m, "\nWrites: %d Bytes: %lld",
 366                                         atomic_read(&tcon->num_writes),
 367                                         (long long)(tcon->bytes_written));
 368                                 seq_printf(m, "\nFlushes: %d",
 369                                         atomic_read(&tcon->num_flushes));
 370                                 seq_printf(m, "\nLocks: %d HardLinks: %d "
 371                                               "Symlinks: %d",
 372                                         atomic_read(&tcon->num_locks),
 373                                         atomic_read(&tcon->num_hardlinks),
 374                                         atomic_read(&tcon->num_symlinks));
 375                                 seq_printf(m, "\nOpens: %d Closes: %d "
 376                                               "Deletes: %d",
 377                                         atomic_read(&tcon->num_opens),
 378                                         atomic_read(&tcon->num_closes),
 379                                         atomic_read(&tcon->num_deletes));
 380                                 seq_printf(m, "\nPosix Opens: %d "
 381                                               "Posix Mkdirs: %d",
 382                                         atomic_read(&tcon->num_posixopens),
 383                                         atomic_read(&tcon->num_posixmkdirs));
 384                                 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
 385                                         atomic_read(&tcon->num_mkdirs),
 386                                         atomic_read(&tcon->num_rmdirs));
 387                                 seq_printf(m, "\nRenames: %d T2 Renames %d",
 388                                         atomic_read(&tcon->num_renames),
 389                                         atomic_read(&tcon->num_t2renames));
 390                                 seq_printf(m, "\nFindFirst: %d FNext %d "
 391                                               "FClose %d",
 392                                         atomic_read(&tcon->num_ffirst),
 393                                         atomic_read(&tcon->num_fnext),
 394                                         atomic_read(&tcon->num_fclose));
 395                         }
 396                 }
 397         }
 398         spin_unlock(&cifs_tcp_ses_lock);
 399
 400         seq_putc(m, '\n');
 401         return 0;
 402 }
 403
 404 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 405 {
 406         return single_open(file, cifs_stats_proc_show, NULL);
 407 }
 408
 409 static const struct file_operations cifs_stats_proc_fops = {
 410         .owner          = THIS_MODULE,
 411         .open           = cifs_stats_proc_open,
 412         .read           = seq_read,
 413         .llseek         = seq_lseek,
 414         .release        = single_release,
 415         .write          = cifs_stats_proc_write,
 416 };
 417 #endif /* STATS */
 418
 419 static struct proc_dir_entry *proc_fs_cifs;
 420 static const struct file_operations cifsFYI_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("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 442                     &cifs_linux_ext_proc_fops);
 443         proc_create("MultiuserMount", 0, proc_fs_cifs,
 444                     &cifs_multiuser_mount_proc_fops);
 445         proc_create("SecurityFlags", 0, proc_fs_cifs,
 446                     &cifs_security_flags_proc_fops);
 447         proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
 448                     &cifs_lookup_cache_proc_fops);
 449 }
 450
 451 void
 452 cifs_proc_clean(void)
 453 {
 454         if (proc_fs_cifs == NULL)
 455                 return;
 456
 457         remove_proc_entry("DebugData", proc_fs_cifs);
 458         remove_proc_entry("cifsFYI", proc_fs_cifs);
 459         remove_proc_entry("traceSMB", proc_fs_cifs);
 460 #ifdef CONFIG_CIFS_STATS
 461         remove_proc_entry("Stats", proc_fs_cifs);
 462 #endif
 463         remove_proc_entry("MultiuserMount", proc_fs_cifs);
 464         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 465         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 466         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 467         remove_proc_entry("fs/cifs", NULL);
 468 }
 469
 470 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 471 {
 472         seq_printf(m, "%d\n", cifsFYI);
 473         return 0;
 474 }
 475
 476 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 477 {
 478         return single_open(file, cifsFYI_proc_show, NULL);
 479 }
 480
 481 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 482                 size_t count, loff_t *ppos)
 483 {
 484         char c;
 485         int rc;
 486
 487         rc = get_user(c, buffer);
 488         if (rc)
 489                 return rc;
 490         if (c == '0' || c == 'n' || c == 'N')
 491                 cifsFYI = 0;
 492         else if (c == '1' || c == 'y' || c == 'Y')
 493                 cifsFYI = 1;
 494         else if ((c > '1') && (c <= '9'))
 495                 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
 496
 497         return count;
 498 }
 499
 500 static const struct file_operations cifsFYI_proc_fops = {
 501         .owner          = THIS_MODULE,
 502         .open           = cifsFYI_proc_open,
 503         .read           = seq_read,
 504         .llseek         = seq_lseek,
 505         .release        = single_release,
 506         .write          = cifsFYI_proc_write,
 507 };
 508
 509 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 510 {
 511         seq_printf(m, "%d\n", linuxExtEnabled);
 512         return 0;
 513 }
 514
 515 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 516 {
 517         return single_open(file, cifs_linux_ext_proc_show, NULL);
 518 }
 519
 520 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 521                 const char __user *buffer, size_t count, loff_t *ppos)
 522 {
 523         char c;
 524         int rc;
 525
 526         rc = get_user(c, buffer);
 527         if (rc)
 528                 return rc;
 529         if (c == '0' || c == 'n' || c == 'N')
 530                 linuxExtEnabled = 0;
 531         else if (c == '1' || c == 'y' || c == 'Y')
 532                 linuxExtEnabled = 1;
 533
 534         return count;
 535 }
 536
 537 static const struct file_operations cifs_linux_ext_proc_fops = {
 538         .owner          = THIS_MODULE,
 539         .open           = cifs_linux_ext_proc_open,
 540         .read           = seq_read,
 541         .llseek         = seq_lseek,
 542         .release        = single_release,
 543         .write          = cifs_linux_ext_proc_write,
 544 };
 545
 546 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 547 {
 548         seq_printf(m, "%d\n", lookupCacheEnabled);
 549         return 0;
 550 }
 551
 552 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 553 {
 554         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 555 }
 556
 557 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 558                 const char __user *buffer, size_t count, loff_t *ppos)
 559 {
 560         char c;
 561         int rc;
 562
 563         rc = get_user(c, buffer);
 564         if (rc)
 565                 return rc;
 566         if (c == '0' || c == 'n' || c == 'N')
 567                 lookupCacheEnabled = 0;
 568         else if (c == '1' || c == 'y' || c == 'Y')
 569                 lookupCacheEnabled = 1;
 570
 571         return count;
 572 }
 573
 574 static const struct file_operations cifs_lookup_cache_proc_fops = {
 575         .owner          = THIS_MODULE,
 576         .open           = cifs_lookup_cache_proc_open,
 577         .read           = seq_read,
 578         .llseek         = seq_lseek,
 579         .release        = single_release,
 580         .write          = cifs_lookup_cache_proc_write,
 581 };
 582
 583 static int traceSMB_proc_show(struct seq_file *m, void *v)
 584 {
 585         seq_printf(m, "%d\n", traceSMB);
 586         return 0;
 587 }
 588
 589 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 590 {
 591         return single_open(file, traceSMB_proc_show, NULL);
 592 }
 593
 594 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 595                 size_t count, loff_t *ppos)
 596 {
 597         char c;
 598         int rc;
 599
 600         rc = get_user(c, buffer);
 601         if (rc)
 602                 return rc;
 603         if (c == '0' || c == 'n' || c == 'N')
 604                 traceSMB = 0;
 605         else if (c == '1' || c == 'y' || c == 'Y')
 606                 traceSMB = 1;
 607
 608         return count;
 609 }
 610
 611 static const struct file_operations traceSMB_proc_fops = {
 612         .owner          = THIS_MODULE,
 613         .open           = traceSMB_proc_open,
 614         .read           = seq_read,
 615         .llseek         = seq_lseek,
 616         .release        = single_release,
 617         .write          = traceSMB_proc_write,
 618 };
 619
 620 static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
 621 {
 622         seq_printf(m, "%d\n", multiuser_mount);
 623         return 0;
 624 }
 625
 626 static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
 627 {
 628         return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
 629 }
 630
 631 static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
 632                 const char __user *buffer, size_t count, loff_t *ppos)
 633 {
 634         char c;
 635         int rc;
 636         static bool warned;
 637
 638         rc = get_user(c, buffer);
 639         if (rc)
 640                 return rc;
 641         if (c == '0' || c == 'n' || c == 'N')
 642                 multiuser_mount = 0;
 643         else if (c == '1' || c == 'y' || c == 'Y') {
 644                 multiuser_mount = 1;
 645                 if (!warned) {
 646                         warned = true;
 647                         printk(KERN_WARNING "CIFS VFS: The legacy multiuser "
 648                                 "mount code is scheduled to be deprecated in "
 649                                 "3.5. Please switch to using the multiuser "
 650                                 "mount option.");
 651                 }
 652         }
 653
 654         return count;
 655 }
 656
 657 static const struct file_operations cifs_multiuser_mount_proc_fops = {
 658         .owner          = THIS_MODULE,
 659         .open           = cifs_multiuser_mount_proc_open,
 660         .read           = seq_read,
 661         .llseek         = seq_lseek,
 662         .release        = single_release,
 663         .write          = cifs_multiuser_mount_proc_write,
 664 };
 665
 666 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 667 {
 668         seq_printf(m, "0x%x\n", global_secflags);
 669         return 0;
 670 }
 671
 672 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 673 {
 674         return single_open(file, cifs_security_flags_proc_show, NULL);
 675 }
 676
 677 static ssize_t cifs_security_flags_proc_write(struct file *file,
 678                 const char __user *buffer, size_t count, loff_t *ppos)
 679 {
 680         unsigned int flags;
 681         char flags_string[12];
 682         char c;
 683
 684         if ((count < 1) || (count > 11))
 685                 return -EINVAL;
 686
 687         memset(flags_string, 0, 12);
 688
 689         if (copy_from_user(flags_string, buffer, count))
 690                 return -EFAULT;
 691
 692         if (count < 3) {
 693                 /* single char or single char followed by null */
 694                 c = flags_string[0];
 695                 if (c == '0' || c == 'n' || c == 'N') {
 696                         global_secflags = CIFSSEC_DEF; /* default */
 697                         return count;
 698                 } else if (c == '1' || c == 'y' || c == 'Y') {
 699                         global_secflags = CIFSSEC_MAX;
 700                         return count;
 701                 } else if (!isdigit(c)) {
 702                         cERROR(1, "invalid flag %c", c);
 703                         return -EINVAL;
 704                 }
 705         }
 706         /* else we have a number */
 707
 708         flags = simple_strtoul(flags_string, NULL, 0);
 709
 710         cFYI(1, "sec flags 0x%x", flags);
 711
 712         if (flags <= 0)  {
 713                 cERROR(1, "invalid security flags %s", flags_string);
 714                 return -EINVAL;
 715         }
 716
 717         if (flags & ~CIFSSEC_MASK) {
 718                 cERROR(1, "attempt to set unsupported security flags 0x%x",
 719                         flags & ~CIFSSEC_MASK);
 720                 return -EINVAL;
 721         }
 722         /* flags look ok - update the global security flags for cifs module */
 723         global_secflags = flags;
 724         if (global_secflags & CIFSSEC_MUST_SIGN) {
 725                 /* requiring signing implies signing is allowed */
 726                 global_secflags |= CIFSSEC_MAY_SIGN;
 727                 cFYI(1, "packet signing now required");
 728         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 729                 cFYI(1, "packet signing disabled");
 730         }
 731         /* BB should we turn on MAY flags for other MUST options? */
 732         return count;
 733 }
 734
 735 static const struct file_operations cifs_security_flags_proc_fops = {
 736         .owner          = THIS_MODULE,
 737         .open           = cifs_security_flags_proc_open,
 738         .read           = seq_read,
 739         .llseek         = seq_lseek,
 740         .release        = single_release,
 741         .write          = cifs_security_flags_proc_write,
 742 };
 743 #else
 744 inline void cifs_proc_init(void)
 745 {
 746 }
 747
 748 inline void cifs_proc_clean(void)
 749 {
 750 }
 751 #endif /* PROC_FS */