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_LE(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 Tsk: %p Mid %d",
  83                         mid_entry->midState,
  84                         (int)mid_entry->command,
  85                         mid_entry->pid,
  86                         mid_entry->tsk,
  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 cifsSesInfo *ses;
 114         struct cifsTconInfo *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, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 123         seq_printf(m, "Servers:");
 124
 125         i = 0;
 126         read_lock(&cifs_tcp_ses_lock);
 127         list_for_each(tmp1, &cifs_tcp_ses_list) {
 128                 server = list_entry(tmp1, struct TCP_Server_Info,
 129                                     tcp_ses_list);
 130                 i++;
 131                 list_for_each(tmp2, &server->smb_ses_list) {
 132                         ses = list_entry(tmp2, struct cifsSesInfo,
 133                                          smb_ses_list);
 134                         if ((ses->serverDomain == NULL) ||
 135                                 (ses->serverOS == NULL) ||
 136                                 (ses->serverNOS == NULL)) {
 137                                 seq_printf(m, "\n%d) entry for %s not fully "
 138                                            "displayed\n\t", i, ses->serverName);
 139                         } else {
 140                                 seq_printf(m,
 141                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 142                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 143                                     " session status: %d\t",
 144                                 i, ses->serverName, ses->serverDomain,
 145                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 146                                 ses->capabilities, ses->status);
 147                         }
 148                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 149                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 150                                    server->tcpStatus, server->srv_count,
 151                                    server->secMode,
 152                                    atomic_read(&server->inFlight));
 153
 154 #ifdef CONFIG_CIFS_STATS2
 155                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 156                                 atomic_read(&server->inSend),
 157                                 atomic_read(&server->num_waiters));
 158 #endif
 159
 160                         seq_puts(m, "\n\tShares:");
 161                         j = 0;
 162                         list_for_each(tmp3, &ses->tcon_list) {
 163                                 tcon = list_entry(tmp3, struct cifsTconInfo,
 164                                                   tcon_list);
 165                                 ++j;
 166                                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 167                                 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
 168                                            tcon->treeName, tcon->tc_count);
 169                                 if (tcon->nativeFileSystem) {
 170                                         seq_printf(m, "Type: %s ",
 171                                                    tcon->nativeFileSystem);
 172                                 }
 173                                 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
 174                                         "\nPathComponentMax: %d Status: 0x%d",
 175                                         le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 176                                         le32_to_cpu(tcon->fsAttrInfo.Attributes),
 177                                         le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 178                                         tcon->tidStatus);
 179                                 if (dev_type == FILE_DEVICE_DISK)
 180                                         seq_puts(m, " type: DISK ");
 181                                 else if (dev_type == FILE_DEVICE_CD_ROM)
 182                                         seq_puts(m, " type: CDROM ");
 183                                 else
 184                                         seq_printf(m, " type: %d ", dev_type);
 185
 186                                 if (tcon->need_reconnect)
 187                                         seq_puts(m, "\tDISCONNECTED ");
 188                                 seq_putc(m, '\n');
 189                         }
 190
 191                         seq_puts(m, "\n\tMIDs:\n");
 192
 193                         spin_lock(&GlobalMid_Lock);
 194                         list_for_each(tmp3, &server->pending_mid_q) {
 195                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 196                                         qhead);
 197                                 seq_printf(m, "\tState: %d com: %d pid:"
 198                                                 " %d tsk: %p mid %d\n",
 199                                                 mid_entry->midState,
 200                                                 (int)mid_entry->command,
 201                                                 mid_entry->pid,
 202                                                 mid_entry->tsk,
 203                                                 mid_entry->mid);
 204                         }
 205                         spin_unlock(&GlobalMid_Lock);
 206                 }
 207         }
 208         read_unlock(&cifs_tcp_ses_lock);
 209         seq_putc(m, '\n');
 210
 211         /* BB add code to dump additional info such as TCP session info now */
 212         return 0;
 213 }
 214
 215 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
 216 {
 217         return single_open(file, cifs_debug_data_proc_show, NULL);
 218 }
 219
 220 static const struct file_operations cifs_debug_data_proc_fops = {
 221         .owner          = THIS_MODULE,
 222         .open           = cifs_debug_data_proc_open,
 223         .read           = seq_read,
 224         .llseek         = seq_lseek,
 225         .release        = single_release,
 226 };
 227
 228 #ifdef CONFIG_CIFS_STATS
 229 static ssize_t cifs_stats_proc_write(struct file *file,
 230                 const char __user *buffer, size_t count, loff_t *ppos)
 231 {
 232         char c;
 233         int rc;
 234         struct list_head *tmp1, *tmp2, *tmp3;
 235         struct TCP_Server_Info *server;
 236         struct cifsSesInfo *ses;
 237         struct cifsTconInfo *tcon;
 238
 239         rc = get_user(c, buffer);
 240         if (rc)
 241                 return rc;
 242
 243         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
 244 #ifdef CONFIG_CIFS_STATS2
 245                 atomic_set(&totBufAllocCount, 0);
 246                 atomic_set(&totSmBufAllocCount, 0);
 247 #endif /* CONFIG_CIFS_STATS2 */
 248                 read_lock(&cifs_tcp_ses_lock);
 249                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 250                         server = list_entry(tmp1, struct TCP_Server_Info,
 251                                             tcp_ses_list);
 252                         list_for_each(tmp2, &server->smb_ses_list) {
 253                                 ses = list_entry(tmp2, struct cifsSesInfo,
 254                                                  smb_ses_list);
 255                                 list_for_each(tmp3, &ses->tcon_list) {
 256                                         tcon = list_entry(tmp3,
 257                                                           struct cifsTconInfo,
 258                                                           tcon_list);
 259                                         atomic_set(&tcon->num_smbs_sent, 0);
 260                                         atomic_set(&tcon->num_writes, 0);
 261                                         atomic_set(&tcon->num_reads, 0);
 262                                         atomic_set(&tcon->num_oplock_brks, 0);
 263                                         atomic_set(&tcon->num_opens, 0);
 264                                         atomic_set(&tcon->num_posixopens, 0);
 265                                         atomic_set(&tcon->num_posixmkdirs, 0);
 266                                         atomic_set(&tcon->num_closes, 0);
 267                                         atomic_set(&tcon->num_deletes, 0);
 268                                         atomic_set(&tcon->num_mkdirs, 0);
 269                                         atomic_set(&tcon->num_rmdirs, 0);
 270                                         atomic_set(&tcon->num_renames, 0);
 271                                         atomic_set(&tcon->num_t2renames, 0);
 272                                         atomic_set(&tcon->num_ffirst, 0);
 273                                         atomic_set(&tcon->num_fnext, 0);
 274                                         atomic_set(&tcon->num_fclose, 0);
 275                                         atomic_set(&tcon->num_hardlinks, 0);
 276                                         atomic_set(&tcon->num_symlinks, 0);
 277                                         atomic_set(&tcon->num_locks, 0);
 278                                 }
 279                         }
 280                 }
 281                 read_unlock(&cifs_tcp_ses_lock);
 282         }
 283
 284         return count;
 285 }
 286
 287 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 288 {
 289         int i;
 290         struct list_head *tmp1, *tmp2, *tmp3;
 291         struct TCP_Server_Info *server;
 292         struct cifsSesInfo *ses;
 293         struct cifsTconInfo *tcon;
 294
 295         seq_printf(m,
 296                         "Resources in use\nCIFS Session: %d\n",
 297                         sesInfoAllocCount.counter);
 298         seq_printf(m, "Share (unique mount targets): %d\n",
 299                         tconInfoAllocCount.counter);
 300         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 301                         bufAllocCount.counter,
 302                         cifs_min_rcv + tcpSesAllocCount.counter);
 303         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 304                         smBufAllocCount.counter, cifs_min_small);
 305 #ifdef CONFIG_CIFS_STATS2
 306         seq_printf(m, "Total Large %d Small %d Allocations\n",
 307                                 atomic_read(&totBufAllocCount),
 308                                 atomic_read(&totSmBufAllocCount));
 309 #endif /* CONFIG_CIFS_STATS2 */
 310
 311         seq_printf(m, "Operations (MIDs): %d\n", midCount.counter);
 312         seq_printf(m,
 313                 "\n%d session %d share reconnects\n",
 314                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 315
 316         seq_printf(m,
 317                 "Total vfs operations: %d maximum at one time: %d\n",
 318                 GlobalCurrentXid, GlobalMaxActiveXid);
 319
 320         i = 0;
 321         read_lock(&cifs_tcp_ses_lock);
 322         list_for_each(tmp1, &cifs_tcp_ses_list) {
 323                 server = list_entry(tmp1, struct TCP_Server_Info,
 324                                     tcp_ses_list);
 325                 list_for_each(tmp2, &server->smb_ses_list) {
 326                         ses = list_entry(tmp2, struct cifsSesInfo,
 327                                          smb_ses_list);
 328                         list_for_each(tmp3, &ses->tcon_list) {
 329                                 tcon = list_entry(tmp3,
 330                                                   struct cifsTconInfo,
 331                                                   tcon_list);
 332                                 i++;
 333                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 334                                 if (tcon->need_reconnect)
 335                                         seq_puts(m, "\tDISCONNECTED ");
 336                                 seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
 337                                         atomic_read(&tcon->num_smbs_sent),
 338                                         atomic_read(&tcon->num_oplock_brks));
 339                                 seq_printf(m, "\nReads:  %d Bytes: %lld",
 340                                         atomic_read(&tcon->num_reads),
 341                                         (long long)(tcon->bytes_read));
 342                                 seq_printf(m, "\nWrites: %d Bytes: %lld",
 343                                         atomic_read(&tcon->num_writes),
 344                                         (long long)(tcon->bytes_written));
 345                                 seq_printf(m, "\nFlushes: %d",
 346                                         atomic_read(&tcon->num_flushes));
 347                                 seq_printf(m, "\nLocks: %d HardLinks: %d "
 348                                               "Symlinks: %d",
 349                                         atomic_read(&tcon->num_locks),
 350                                         atomic_read(&tcon->num_hardlinks),
 351                                         atomic_read(&tcon->num_symlinks));
 352                                 seq_printf(m, "\nOpens: %d Closes: %d "
 353                                               "Deletes: %d",
 354                                         atomic_read(&tcon->num_opens),
 355                                         atomic_read(&tcon->num_closes),
 356                                         atomic_read(&tcon->num_deletes));
 357                                 seq_printf(m, "\nPosix Opens: %d "
 358                                               "Posix Mkdirs: %d",
 359                                         atomic_read(&tcon->num_posixopens),
 360                                         atomic_read(&tcon->num_posixmkdirs));
 361                                 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
 362                                         atomic_read(&tcon->num_mkdirs),
 363                                         atomic_read(&tcon->num_rmdirs));
 364                                 seq_printf(m, "\nRenames: %d T2 Renames %d",
 365                                         atomic_read(&tcon->num_renames),
 366                                         atomic_read(&tcon->num_t2renames));
 367                                 seq_printf(m, "\nFindFirst: %d FNext %d "
 368                                               "FClose %d",
 369                                         atomic_read(&tcon->num_ffirst),
 370                                         atomic_read(&tcon->num_fnext),
 371                                         atomic_read(&tcon->num_fclose));
 372                         }
 373                 }
 374         }
 375         read_unlock(&cifs_tcp_ses_lock);
 376
 377         seq_putc(m, '\n');
 378         return 0;
 379 }
 380
 381 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 382 {
 383         return single_open(file, cifs_stats_proc_show, NULL);
 384 }
 385
 386 static const struct file_operations cifs_stats_proc_fops = {
 387         .owner          = THIS_MODULE,
 388         .open           = cifs_stats_proc_open,
 389         .read           = seq_read,
 390         .llseek         = seq_lseek,
 391         .release        = single_release,
 392         .write          = cifs_stats_proc_write,
 393 };
 394 #endif /* STATS */
 395
 396 static struct proc_dir_entry *proc_fs_cifs;
 397 static const struct file_operations cifsFYI_proc_fops;
 398 static const struct file_operations cifs_oplock_proc_fops;
 399 static const struct file_operations cifs_lookup_cache_proc_fops;
 400 static const struct file_operations traceSMB_proc_fops;
 401 static const struct file_operations cifs_multiuser_mount_proc_fops;
 402 static const struct file_operations cifs_security_flags_proc_fops;
 403 static const struct file_operations cifs_experimental_proc_fops;
 404 static const struct file_operations cifs_linux_ext_proc_fops;
 405
 406 void
 407 cifs_proc_init(void)
 408 {
 409         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 410         if (proc_fs_cifs == NULL)
 411                 return;
 412
 413         proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
 414
 415 #ifdef CONFIG_CIFS_STATS
 416         proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
 417 #endif /* STATS */
 418         proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
 419         proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
 420         proc_create("OplockEnabled", 0, proc_fs_cifs, &cifs_oplock_proc_fops);
 421         proc_create("Experimental", 0, proc_fs_cifs,
 422                     &cifs_experimental_proc_fops);
 423         proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 424                     &cifs_linux_ext_proc_fops);
 425         proc_create("MultiuserMount", 0, proc_fs_cifs,
 426                     &cifs_multiuser_mount_proc_fops);
 427         proc_create("SecurityFlags", 0, proc_fs_cifs,
 428                     &cifs_security_flags_proc_fops);
 429         proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
 430                     &cifs_lookup_cache_proc_fops);
 431 }
 432
 433 void
 434 cifs_proc_clean(void)
 435 {
 436         if (proc_fs_cifs == NULL)
 437                 return;
 438
 439         remove_proc_entry("DebugData", proc_fs_cifs);
 440         remove_proc_entry("cifsFYI", proc_fs_cifs);
 441         remove_proc_entry("traceSMB", proc_fs_cifs);
 442 #ifdef CONFIG_CIFS_STATS
 443         remove_proc_entry("Stats", proc_fs_cifs);
 444 #endif
 445         remove_proc_entry("MultiuserMount", proc_fs_cifs);
 446         remove_proc_entry("OplockEnabled", proc_fs_cifs);
 447         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 448         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 449         remove_proc_entry("Experimental", proc_fs_cifs);
 450         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 451         remove_proc_entry("fs/cifs", NULL);
 452 }
 453
 454 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 455 {
 456         seq_printf(m, "%d\n", cifsFYI);
 457         return 0;
 458 }
 459
 460 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 461 {
 462         return single_open(file, cifsFYI_proc_show, NULL);
 463 }
 464
 465 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 466                 size_t count, loff_t *ppos)
 467 {
 468         char c;
 469         int rc;
 470
 471         rc = get_user(c, buffer);
 472         if (rc)
 473                 return rc;
 474         if (c == '0' || c == 'n' || c == 'N')
 475                 cifsFYI = 0;
 476         else if (c == '1' || c == 'y' || c == 'Y')
 477                 cifsFYI = 1;
 478         else if ((c > '1') && (c <= '9'))
 479                 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
 480
 481         return count;
 482 }
 483
 484 static const struct file_operations cifsFYI_proc_fops = {
 485         .owner          = THIS_MODULE,
 486         .open           = cifsFYI_proc_open,
 487         .read           = seq_read,
 488         .llseek         = seq_lseek,
 489         .release        = single_release,
 490         .write          = cifsFYI_proc_write,
 491 };
 492
 493 static int cifs_oplock_proc_show(struct seq_file *m, void *v)
 494 {
 495         seq_printf(m, "%d\n", oplockEnabled);
 496         return 0;
 497 }
 498
 499 static int cifs_oplock_proc_open(struct inode *inode, struct file *file)
 500 {
 501         return single_open(file, cifs_oplock_proc_show, NULL);
 502 }
 503
 504 static ssize_t cifs_oplock_proc_write(struct file *file,
 505                 const char __user *buffer, size_t count, loff_t *ppos)
 506 {
 507         char c;
 508         int rc;
 509
 510         rc = get_user(c, buffer);
 511         if (rc)
 512                 return rc;
 513         if (c == '0' || c == 'n' || c == 'N')
 514                 oplockEnabled = 0;
 515         else if (c == '1' || c == 'y' || c == 'Y')
 516                 oplockEnabled = 1;
 517
 518         return count;
 519 }
 520
 521 static const struct file_operations cifs_oplock_proc_fops = {
 522         .owner          = THIS_MODULE,
 523         .open           = cifs_oplock_proc_open,
 524         .read           = seq_read,
 525         .llseek         = seq_lseek,
 526         .release        = single_release,
 527         .write          = cifs_oplock_proc_write,
 528 };
 529
 530 static int cifs_experimental_proc_show(struct seq_file *m, void *v)
 531 {
 532         seq_printf(m, "%d\n", experimEnabled);
 533         return 0;
 534 }
 535
 536 static int cifs_experimental_proc_open(struct inode *inode, struct file *file)
 537 {
 538         return single_open(file, cifs_experimental_proc_show, NULL);
 539 }
 540
 541 static ssize_t cifs_experimental_proc_write(struct file *file,
 542                 const char __user *buffer, size_t count, loff_t *ppos)
 543 {
 544         char c;
 545         int rc;
 546
 547         rc = get_user(c, buffer);
 548         if (rc)
 549                 return rc;
 550         if (c == '0' || c == 'n' || c == 'N')
 551                 experimEnabled = 0;
 552         else if (c == '1' || c == 'y' || c == 'Y')
 553                 experimEnabled = 1;
 554         else if (c == '2')
 555                 experimEnabled = 2;
 556
 557         return count;
 558 }
 559
 560 static const struct file_operations cifs_experimental_proc_fops = {
 561         .owner          = THIS_MODULE,
 562         .open           = cifs_experimental_proc_open,
 563         .read           = seq_read,
 564         .llseek         = seq_lseek,
 565         .release        = single_release,
 566         .write          = cifs_experimental_proc_write,
 567 };
 568
 569 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 570 {
 571         seq_printf(m, "%d\n", linuxExtEnabled);
 572         return 0;
 573 }
 574
 575 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 576 {
 577         return single_open(file, cifs_linux_ext_proc_show, NULL);
 578 }
 579
 580 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 581                 const char __user *buffer, size_t count, loff_t *ppos)
 582 {
 583         char c;
 584         int rc;
 585
 586         rc = get_user(c, buffer);
 587         if (rc)
 588                 return rc;
 589         if (c == '0' || c == 'n' || c == 'N')
 590                 linuxExtEnabled = 0;
 591         else if (c == '1' || c == 'y' || c == 'Y')
 592                 linuxExtEnabled = 1;
 593
 594         return count;
 595 }
 596
 597 static const struct file_operations cifs_linux_ext_proc_fops = {
 598         .owner          = THIS_MODULE,
 599         .open           = cifs_linux_ext_proc_open,
 600         .read           = seq_read,
 601         .llseek         = seq_lseek,
 602         .release        = single_release,
 603         .write          = cifs_linux_ext_proc_write,
 604 };
 605
 606 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 607 {
 608         seq_printf(m, "%d\n", lookupCacheEnabled);
 609         return 0;
 610 }
 611
 612 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 613 {
 614         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 615 }
 616
 617 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 618                 const char __user *buffer, size_t count, loff_t *ppos)
 619 {
 620         char c;
 621         int rc;
 622
 623         rc = get_user(c, buffer);
 624         if (rc)
 625                 return rc;
 626         if (c == '0' || c == 'n' || c == 'N')
 627                 lookupCacheEnabled = 0;
 628         else if (c == '1' || c == 'y' || c == 'Y')
 629                 lookupCacheEnabled = 1;
 630
 631         return count;
 632 }
 633
 634 static const struct file_operations cifs_lookup_cache_proc_fops = {
 635         .owner          = THIS_MODULE,
 636         .open           = cifs_lookup_cache_proc_open,
 637         .read           = seq_read,
 638         .llseek         = seq_lseek,
 639         .release        = single_release,
 640         .write          = cifs_lookup_cache_proc_write,
 641 };
 642
 643 static int traceSMB_proc_show(struct seq_file *m, void *v)
 644 {
 645         seq_printf(m, "%d\n", traceSMB);
 646         return 0;
 647 }
 648
 649 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 650 {
 651         return single_open(file, traceSMB_proc_show, NULL);
 652 }
 653
 654 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 655                 size_t count, loff_t *ppos)
 656 {
 657         char c;
 658         int rc;
 659
 660         rc = get_user(c, buffer);
 661         if (rc)
 662                 return rc;
 663         if (c == '0' || c == 'n' || c == 'N')
 664                 traceSMB = 0;
 665         else if (c == '1' || c == 'y' || c == 'Y')
 666                 traceSMB = 1;
 667
 668         return count;
 669 }
 670
 671 static const struct file_operations traceSMB_proc_fops = {
 672         .owner          = THIS_MODULE,
 673         .open           = traceSMB_proc_open,
 674         .read           = seq_read,
 675         .llseek         = seq_lseek,
 676         .release        = single_release,
 677         .write          = traceSMB_proc_write,
 678 };
 679
 680 static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
 681 {
 682         seq_printf(m, "%d\n", multiuser_mount);
 683         return 0;
 684 }
 685
 686 static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
 687 {
 688         return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
 689 }
 690
 691 static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
 692                 const char __user *buffer, size_t count, loff_t *ppos)
 693 {
 694         char c;
 695         int rc;
 696
 697         rc = get_user(c, buffer);
 698         if (rc)
 699                 return rc;
 700         if (c == '0' || c == 'n' || c == 'N')
 701                 multiuser_mount = 0;
 702         else if (c == '1' || c == 'y' || c == 'Y')
 703                 multiuser_mount = 1;
 704
 705         return count;
 706 }
 707
 708 static const struct file_operations cifs_multiuser_mount_proc_fops = {
 709         .owner          = THIS_MODULE,
 710         .open           = cifs_multiuser_mount_proc_open,
 711         .read           = seq_read,
 712         .llseek         = seq_lseek,
 713         .release        = single_release,
 714         .write          = cifs_multiuser_mount_proc_write,
 715 };
 716
 717 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 718 {
 719         seq_printf(m, "0x%x\n", global_secflags);
 720         return 0;
 721 }
 722
 723 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 724 {
 725         return single_open(file, cifs_security_flags_proc_show, NULL);
 726 }
 727
 728 static ssize_t cifs_security_flags_proc_write(struct file *file,
 729                 const char __user *buffer, size_t count, loff_t *ppos)
 730 {
 731         unsigned int flags;
 732         char flags_string[12];
 733         char c;
 734
 735         if ((count < 1) || (count > 11))
 736                 return -EINVAL;
 737
 738         memset(flags_string, 0, 12);
 739
 740         if (copy_from_user(flags_string, buffer, count))
 741                 return -EFAULT;
 742
 743         if (count < 3) {
 744                 /* single char or single char followed by null */
 745                 c = flags_string[0];
 746                 if (c == '0' || c == 'n' || c == 'N') {
 747                         global_secflags = CIFSSEC_DEF; /* default */
 748                         return count;
 749                 } else if (c == '1' || c == 'y' || c == 'Y') {
 750                         global_secflags = CIFSSEC_MAX;
 751                         return count;
 752                 } else if (!isdigit(c)) {
 753                         cERROR(1, "invalid flag %c", c);
 754                         return -EINVAL;
 755                 }
 756         }
 757         /* else we have a number */
 758
 759         flags = simple_strtoul(flags_string, NULL, 0);
 760
 761         cFYI(1, "sec flags 0x%x", flags);
 762
 763         if (flags <= 0)  {
 764                 cERROR(1, "invalid security flags %s", flags_string);
 765                 return -EINVAL;
 766         }
 767
 768         if (flags & ~CIFSSEC_MASK) {
 769                 cERROR(1, "attempt to set unsupported security flags 0x%x",
 770                         flags & ~CIFSSEC_MASK);
 771                 return -EINVAL;
 772         }
 773         /* flags look ok - update the global security flags for cifs module */
 774         global_secflags = flags;
 775         if (global_secflags & CIFSSEC_MUST_SIGN) {
 776                 /* requiring signing implies signing is allowed */
 777                 global_secflags |= CIFSSEC_MAY_SIGN;
 778                 cFYI(1, "packet signing now required");
 779         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 780                 cFYI(1, "packet signing disabled");
 781         }
 782         /* BB should we turn on MAY flags for other MUST options? */
 783         return count;
 784 }
 785
 786 static const struct file_operations cifs_security_flags_proc_fops = {
 787         .owner          = THIS_MODULE,
 788         .open           = cifs_security_flags_proc_open,
 789         .read           = seq_read,
 790         .llseek         = seq_lseek,
 791         .release        = single_release,
 792         .write          = cifs_security_flags_proc_write,
 793 };
 794 #else
 795 inline void cifs_proc_init(void)
 796 {
 797 }
 798
 799 inline void cifs_proc_clean(void)
 800 {
 801 }
 802 #endif /* PROC_FS */