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   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                 if (mid_entry) {
  83                         cERROR(1, ("State: %d Cmd: %d Pid: %d Tsk: %p Mid %d",
  84                                 mid_entry->midState,
  85                                 (int)mid_entry->command,
  86                                 mid_entry->pid,
  87                                 mid_entry->tsk,
  88                                 mid_entry->mid));
  89 #ifdef CONFIG_CIFS_STATS2
  90                         cERROR(1, ("IsLarge: %d buf: %p time rcv: %ld now: %ld",
  91                                 mid_entry->largeBuf,
  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         }
 105         spin_unlock(&GlobalMid_Lock);
 106 }
 107 #endif /* CONFIG_CIFS_DEBUG2 */
 108
 109 #ifdef CONFIG_PROC_FS
 110 static int
 111 cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 112                      int count, int *eof, void *data)
 113 {
 114         struct list_head *tmp;
 115         struct list_head *tmp1;
 116         struct mid_q_entry *mid_entry;
 117         struct cifsSesInfo *ses;
 118         struct cifsTconInfo *tcon;
 119         int i;
 120         int length = 0;
 121         char *original_buf = buf;
 122
 123         *beginBuffer = buf + offset;
 124
 125         length =
 126             sprintf(buf,
 127                     "Display Internal CIFS Data Structures for Debugging\n"
 128                     "---------------------------------------------------\n");
 129         buf += length;
 130         length = sprintf(buf, "CIFS Version %s\n", CIFS_VERSION);
 131         buf += length;
 132         length = sprintf(buf,
 133                 "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 134         buf += length;
 135         length = sprintf(buf, "Servers:");
 136         buf += length;
 137
 138         i = 0;
 139         read_lock(&GlobalSMBSeslock);
 140         list_for_each(tmp, &GlobalSMBSessionList) {
 141                 i++;
 142                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 143                 if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
 144                    (ses->serverNOS == NULL)) {
 145                         buf += sprintf(buf, "\nentry for %s not fully "
 146                                         "displayed\n\t", ses->serverName);
 147                 } else {
 148                         length =
 149                             sprintf(buf,
 150                                     "\n%d) Name: %s  Domain: %s Mounts: %d OS:"
 151                                     " %s  \n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 152                                     " session status: %d\t",
 153                                 i, ses->serverName, ses->serverDomain,
 154                                 atomic_read(&ses->inUse),
 155                                 ses->serverOS, ses->serverNOS,
 156                                 ses->capabilities, ses->status);
 157                         buf += length;
 158                 }
 159                 if (ses->server) {
 160                         buf += sprintf(buf, "TCP status: %d\n\tLocal Users To "
 161                                     "Server: %d SecMode: 0x%x Req On Wire: %d",
 162                                 ses->server->tcpStatus,
 163                                 atomic_read(&ses->server->socketUseCount),
 164                                 ses->server->secMode,
 165                                 atomic_read(&ses->server->inFlight));
 166
 167 #ifdef CONFIG_CIFS_STATS2
 168                         buf += sprintf(buf, " In Send: %d In MaxReq Wait: %d",
 169                                 atomic_read(&ses->server->inSend),
 170                                 atomic_read(&ses->server->num_waiters));
 171 #endif
 172
 173                         length = sprintf(buf, "\nMIDs:\n");
 174                         buf += length;
 175
 176                         spin_lock(&GlobalMid_Lock);
 177                         list_for_each(tmp1, &ses->server->pending_mid_q) {
 178                                 mid_entry = list_entry(tmp1, struct
 179                                         mid_q_entry,
 180                                         qhead);
 181                                 if (mid_entry) {
 182                                         length = sprintf(buf,
 183                                                         "State: %d com: %d pid:"
 184                                                         " %d tsk: %p mid %d\n",
 185                                                         mid_entry->midState,
 186                                                         (int)mid_entry->command,
 187                                                         mid_entry->pid,
 188                                                         mid_entry->tsk,
 189                                                         mid_entry->mid);
 190                                         buf += length;
 191                                 }
 192                         }
 193                         spin_unlock(&GlobalMid_Lock);
 194                 }
 195
 196         }
 197         read_unlock(&GlobalSMBSeslock);
 198         sprintf(buf, "\n");
 199         buf++;
 200
 201         length = sprintf(buf, "Shares:");
 202         buf += length;
 203
 204         i = 0;
 205         read_lock(&GlobalSMBSeslock);
 206         list_for_each(tmp, &GlobalTreeConnectionList) {
 207                 __u32 dev_type;
 208                 i++;
 209                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 210                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 211                 length = sprintf(buf, "\n%d) %s Uses: %d ", i,
 212                                  tcon->treeName, atomic_read(&tcon->useCount));
 213                 buf += length;
 214                 if (tcon->nativeFileSystem) {
 215                         length = sprintf(buf, "Type: %s ",
 216                                          tcon->nativeFileSystem);
 217                         buf += length;
 218                 }
 219                 length = sprintf(buf, "DevInfo: 0x%x Attributes: 0x%x"
 220                                  "\nPathComponentMax: %d Status: %d",
 221                             le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 222                             le32_to_cpu(tcon->fsAttrInfo.Attributes),
 223                             le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 224                             tcon->tidStatus);
 225                 buf += length;
 226                 if (dev_type == FILE_DEVICE_DISK)
 227                         length = sprintf(buf, " type: DISK ");
 228                 else if (dev_type == FILE_DEVICE_CD_ROM)
 229                         length = sprintf(buf, " type: CDROM ");
 230                 else
 231                         length =
 232                             sprintf(buf, " type: %d ", dev_type);
 233                 buf += length;
 234                 if (tcon->tidStatus == CifsNeedReconnect) {
 235                         buf += sprintf(buf, "\tDISCONNECTED ");
 236                         length += 14;
 237                 }
 238         }
 239         read_unlock(&GlobalSMBSeslock);
 240
 241         length = sprintf(buf, "\n");
 242         buf += length;
 243
 244         /* BB add code to dump additional info such as TCP session info now */
 245         /* Now calculate total size of returned data */
 246         length = buf - original_buf;
 247
 248         if (offset + count >= length)
 249                 *eof = 1;
 250         if (length < offset) {
 251                 *eof = 1;
 252                 return 0;
 253         } else {
 254                 length = length - offset;
 255         }
 256         if (length > count)
 257                 length = count;
 258
 259         return length;
 260 }
 261
 262 #ifdef CONFIG_CIFS_STATS
 263
 264 static int
 265 cifs_stats_write(struct file *file, const char __user *buffer,
 266                  unsigned long count, void *data)
 267 {
 268         char c;
 269         int rc;
 270         struct list_head *tmp;
 271         struct cifsTconInfo *tcon;
 272
 273         rc = get_user(c, buffer);
 274         if (rc)
 275                 return rc;
 276
 277         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
 278                 read_lock(&GlobalSMBSeslock);
 279 #ifdef CONFIG_CIFS_STATS2
 280                 atomic_set(&totBufAllocCount, 0);
 281                 atomic_set(&totSmBufAllocCount, 0);
 282 #endif /* CONFIG_CIFS_STATS2 */
 283                 list_for_each(tmp, &GlobalTreeConnectionList) {
 284                         tcon = list_entry(tmp, struct cifsTconInfo,
 285                                         cifsConnectionList);
 286                         atomic_set(&tcon->num_smbs_sent, 0);
 287                         atomic_set(&tcon->num_writes, 0);
 288                         atomic_set(&tcon->num_reads, 0);
 289                         atomic_set(&tcon->num_oplock_brks, 0);
 290                         atomic_set(&tcon->num_opens, 0);
 291                         atomic_set(&tcon->num_closes, 0);
 292                         atomic_set(&tcon->num_deletes, 0);
 293                         atomic_set(&tcon->num_mkdirs, 0);
 294                         atomic_set(&tcon->num_rmdirs, 0);
 295                         atomic_set(&tcon->num_renames, 0);
 296                         atomic_set(&tcon->num_t2renames, 0);
 297                         atomic_set(&tcon->num_ffirst, 0);
 298                         atomic_set(&tcon->num_fnext, 0);
 299                         atomic_set(&tcon->num_fclose, 0);
 300                         atomic_set(&tcon->num_hardlinks, 0);
 301                         atomic_set(&tcon->num_symlinks, 0);
 302                         atomic_set(&tcon->num_locks, 0);
 303                 }
 304                 read_unlock(&GlobalSMBSeslock);
 305         }
 306
 307         return count;
 308 }
 309
 310 static int
 311 cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
 312                   int count, int *eof, void *data)
 313 {
 314         int item_length, i, length;
 315         struct list_head *tmp;
 316         struct cifsTconInfo *tcon;
 317
 318         *beginBuffer = buf + offset;
 319
 320         length = sprintf(buf,
 321                         "Resources in use\nCIFS Session: %d\n",
 322                         sesInfoAllocCount.counter);
 323         buf += length;
 324         item_length =
 325                 sprintf(buf, "Share (unique mount targets): %d\n",
 326                         tconInfoAllocCount.counter);
 327         length += item_length;
 328         buf += item_length;
 329         item_length =
 330                 sprintf(buf, "SMB Request/Response Buffer: %d Pool size: %d\n",
 331                         bufAllocCount.counter,
 332                         cifs_min_rcv + tcpSesAllocCount.counter);
 333         length += item_length;
 334         buf += item_length;
 335         item_length =
 336                 sprintf(buf, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 337                         smBufAllocCount.counter, cifs_min_small);
 338         length += item_length;
 339         buf += item_length;
 340 #ifdef CONFIG_CIFS_STATS2
 341         item_length = sprintf(buf, "Total Large %d Small %d Allocations\n",
 342                                 atomic_read(&totBufAllocCount),
 343                                 atomic_read(&totSmBufAllocCount));
 344         length += item_length;
 345         buf += item_length;
 346 #endif /* CONFIG_CIFS_STATS2 */
 347
 348         item_length =
 349                 sprintf(buf, "Operations (MIDs): %d\n",
 350                         midCount.counter);
 351         length += item_length;
 352         buf += item_length;
 353         item_length = sprintf(buf,
 354                 "\n%d session %d share reconnects\n",
 355                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 356         length += item_length;
 357         buf += item_length;
 358
 359         item_length = sprintf(buf,
 360                 "Total vfs operations: %d maximum at one time: %d\n",
 361                 GlobalCurrentXid, GlobalMaxActiveXid);
 362         length += item_length;
 363         buf += item_length;
 364
 365         i = 0;
 366         read_lock(&GlobalSMBSeslock);
 367         list_for_each(tmp, &GlobalTreeConnectionList) {
 368                 i++;
 369                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 370                 item_length = sprintf(buf, "\n%d) %s", i, tcon->treeName);
 371                 buf += item_length;
 372                 length += item_length;
 373                 if (tcon->tidStatus == CifsNeedReconnect) {
 374                         buf += sprintf(buf, "\tDISCONNECTED ");
 375                         length += 14;
 376                 }
 377                 item_length = sprintf(buf, "\nSMBs: %d Oplock Breaks: %d",
 378                         atomic_read(&tcon->num_smbs_sent),
 379                         atomic_read(&tcon->num_oplock_brks));
 380                 buf += item_length;
 381                 length += item_length;
 382                 item_length = sprintf(buf, "\nReads:  %d Bytes: %lld",
 383                         atomic_read(&tcon->num_reads),
 384                         (long long)(tcon->bytes_read));
 385                 buf += item_length;
 386                 length += item_length;
 387                 item_length = sprintf(buf, "\nWrites: %d Bytes: %lld",
 388                         atomic_read(&tcon->num_writes),
 389                         (long long)(tcon->bytes_written));
 390                 buf += item_length;
 391                 length += item_length;
 392                 item_length = sprintf(buf,
 393                         "\nLocks: %d HardLinks: %d Symlinks: %d",
 394                         atomic_read(&tcon->num_locks),
 395                         atomic_read(&tcon->num_hardlinks),
 396                         atomic_read(&tcon->num_symlinks));
 397                 buf += item_length;
 398                 length += item_length;
 399
 400                 item_length = sprintf(buf, "\nOpens: %d Closes: %d Deletes: %d",
 401                         atomic_read(&tcon->num_opens),
 402                         atomic_read(&tcon->num_closes),
 403                         atomic_read(&tcon->num_deletes));
 404                 buf += item_length;
 405                 length += item_length;
 406                 item_length = sprintf(buf, "\nMkdirs: %d Rmdirs: %d",
 407                         atomic_read(&tcon->num_mkdirs),
 408                         atomic_read(&tcon->num_rmdirs));
 409                 buf += item_length;
 410                 length += item_length;
 411                 item_length = sprintf(buf, "\nRenames: %d T2 Renames %d",
 412                         atomic_read(&tcon->num_renames),
 413                         atomic_read(&tcon->num_t2renames));
 414                 buf += item_length;
 415                 length += item_length;
 416                 item_length = sprintf(buf, "\nFindFirst: %d FNext %d FClose %d",
 417                         atomic_read(&tcon->num_ffirst),
 418                         atomic_read(&tcon->num_fnext),
 419                         atomic_read(&tcon->num_fclose));
 420                 buf += item_length;
 421                 length += item_length;
 422         }
 423         read_unlock(&GlobalSMBSeslock);
 424
 425         buf += sprintf(buf, "\n");
 426         length++;
 427
 428         if (offset + count >= length)
 429                 *eof = 1;
 430         if (length < offset) {
 431                 *eof = 1;
 432                 return 0;
 433         } else {
 434                 length = length - offset;
 435         }
 436         if (length > count)
 437                 length = count;
 438
 439         return length;
 440 }
 441 #endif /* STATS */
 442
 443 static struct proc_dir_entry *proc_fs_cifs;
 444 read_proc_t cifs_txanchor_read;
 445 static read_proc_t cifsFYI_read;
 446 static write_proc_t cifsFYI_write;
 447 static read_proc_t oplockEnabled_read;
 448 static write_proc_t oplockEnabled_write;
 449 static read_proc_t lookupFlag_read;
 450 static write_proc_t lookupFlag_write;
 451 static read_proc_t traceSMB_read;
 452 static write_proc_t traceSMB_write;
 453 static read_proc_t multiuser_mount_read;
 454 static write_proc_t multiuser_mount_write;
 455 static read_proc_t security_flags_read;
 456 static write_proc_t security_flags_write;
 457 /* static read_proc_t ntlmv2_enabled_read;
 458 static write_proc_t ntlmv2_enabled_write;
 459 static read_proc_t packet_signing_enabled_read;
 460 static write_proc_t packet_signing_enabled_write;*/
 461 static read_proc_t experimEnabled_read;
 462 static write_proc_t experimEnabled_write;
 463 static read_proc_t linuxExtensionsEnabled_read;
 464 static write_proc_t linuxExtensionsEnabled_write;
 465
 466 void
 467 cifs_proc_init(void)
 468 {
 469         struct proc_dir_entry *pde;
 470
 471         proc_fs_cifs = proc_mkdir("cifs", proc_root_fs);
 472         if (proc_fs_cifs == NULL)
 473                 return;
 474
 475         proc_fs_cifs->owner = THIS_MODULE;
 476         create_proc_read_entry("DebugData", 0, proc_fs_cifs,
 477                                 cifs_debug_data_read, NULL);
 478
 479 #ifdef CONFIG_CIFS_STATS
 480         pde = create_proc_read_entry("Stats", 0, proc_fs_cifs,
 481                                 cifs_stats_read, NULL);
 482         if (pde)
 483                 pde->write_proc = cifs_stats_write;
 484 #endif /* STATS */
 485         pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
 486                                 cifsFYI_read, NULL);
 487         if (pde)
 488                 pde->write_proc = cifsFYI_write;
 489
 490         pde =
 491             create_proc_read_entry("traceSMB", 0, proc_fs_cifs,
 492                                 traceSMB_read, NULL);
 493         if (pde)
 494                 pde->write_proc = traceSMB_write;
 495
 496         pde = create_proc_read_entry("OplockEnabled", 0, proc_fs_cifs,
 497                                 oplockEnabled_read, NULL);
 498         if (pde)
 499                 pde->write_proc = oplockEnabled_write;
 500
 501         pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
 502                                 experimEnabled_read, NULL);
 503         if (pde)
 504                 pde->write_proc = experimEnabled_write;
 505
 506         pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 507                                 linuxExtensionsEnabled_read, NULL);
 508         if (pde)
 509                 pde->write_proc = linuxExtensionsEnabled_write;
 510
 511         pde =
 512             create_proc_read_entry("MultiuserMount", 0, proc_fs_cifs,
 513                                 multiuser_mount_read, NULL);
 514         if (pde)
 515                 pde->write_proc = multiuser_mount_write;
 516
 517         pde =
 518             create_proc_read_entry("SecurityFlags", 0, proc_fs_cifs,
 519                                 security_flags_read, NULL);
 520         if (pde)
 521                 pde->write_proc = security_flags_write;
 522
 523         pde =
 524         create_proc_read_entry("LookupCacheEnabled", 0, proc_fs_cifs,
 525                                 lookupFlag_read, NULL);
 526         if (pde)
 527                 pde->write_proc = lookupFlag_write;
 528
 529 /*      pde =
 530             create_proc_read_entry("NTLMV2Enabled", 0, proc_fs_cifs,
 531                                 ntlmv2_enabled_read, NULL);
 532         if (pde)
 533                 pde->write_proc = ntlmv2_enabled_write;
 534
 535         pde =
 536             create_proc_read_entry("PacketSigningEnabled", 0, proc_fs_cifs,
 537                                 packet_signing_enabled_read, NULL);
 538         if (pde)
 539                 pde->write_proc = packet_signing_enabled_write;*/
 540 }
 541
 542 void
 543 cifs_proc_clean(void)
 544 {
 545         if (proc_fs_cifs == NULL)
 546                 return;
 547
 548         remove_proc_entry("DebugData", proc_fs_cifs);
 549         remove_proc_entry("cifsFYI", proc_fs_cifs);
 550         remove_proc_entry("traceSMB", proc_fs_cifs);
 551 #ifdef CONFIG_CIFS_STATS
 552         remove_proc_entry("Stats", proc_fs_cifs);
 553 #endif
 554         remove_proc_entry("MultiuserMount", proc_fs_cifs);
 555         remove_proc_entry("OplockEnabled", proc_fs_cifs);
 556 /*      remove_proc_entry("NTLMV2Enabled",proc_fs_cifs); */
 557         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 558 /*      remove_proc_entry("PacketSigningEnabled", proc_fs_cifs); */
 559         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 560         remove_proc_entry("Experimental", proc_fs_cifs);
 561         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 562         remove_proc_entry("cifs", proc_root_fs);
 563 }
 564
 565 static int
 566 cifsFYI_read(char *page, char **start, off_t off, int count,
 567              int *eof, void *data)
 568 {
 569         int len;
 570
 571         len = sprintf(page, "%d\n", cifsFYI);
 572
 573         len -= off;
 574         *start = page + off;
 575
 576         if (len > count)
 577                 len = count;
 578         else
 579                 *eof = 1;
 580
 581         if (len < 0)
 582                 len = 0;
 583
 584         return len;
 585 }
 586 static int
 587 cifsFYI_write(struct file *file, const char __user *buffer,
 588               unsigned long count, void *data)
 589 {
 590         char c;
 591         int rc;
 592
 593         rc = get_user(c, buffer);
 594         if (rc)
 595                 return rc;
 596         if (c == '0' || c == 'n' || c == 'N')
 597                 cifsFYI = 0;
 598         else if (c == '1' || c == 'y' || c == 'Y')
 599                 cifsFYI = 1;
 600         else if ((c > '1') && (c <= '9'))
 601                 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
 602
 603         return count;
 604 }
 605
 606 static int
 607 oplockEnabled_read(char *page, char **start, off_t off,
 608                    int count, int *eof, void *data)
 609 {
 610         int len;
 611
 612         len = sprintf(page, "%d\n", oplockEnabled);
 613
 614         len -= off;
 615         *start = page + off;
 616
 617         if (len > count)
 618                 len = count;
 619         else
 620                 *eof = 1;
 621
 622         if (len < 0)
 623                 len = 0;
 624
 625         return len;
 626 }
 627 static int
 628 oplockEnabled_write(struct file *file, const char __user *buffer,
 629                     unsigned long count, void *data)
 630 {
 631         char c;
 632         int rc;
 633
 634         rc = get_user(c, buffer);
 635         if (rc)
 636                 return rc;
 637         if (c == '0' || c == 'n' || c == 'N')
 638                 oplockEnabled = 0;
 639         else if (c == '1' || c == 'y' || c == 'Y')
 640                 oplockEnabled = 1;
 641
 642         return count;
 643 }
 644
 645 static int
 646 experimEnabled_read(char *page, char **start, off_t off,
 647                     int count, int *eof, void *data)
 648 {
 649         int len;
 650
 651         len = sprintf(page, "%d\n", experimEnabled);
 652
 653         len -= off;
 654         *start = page + off;
 655
 656         if (len > count)
 657                 len = count;
 658         else
 659                 *eof = 1;
 660
 661         if (len < 0)
 662                 len = 0;
 663
 664         return len;
 665 }
 666 static int
 667 experimEnabled_write(struct file *file, const char __user *buffer,
 668                      unsigned long count, void *data)
 669 {
 670         char c;
 671         int rc;
 672
 673         rc = get_user(c, buffer);
 674         if (rc)
 675                 return rc;
 676         if (c == '0' || c == 'n' || c == 'N')
 677                 experimEnabled = 0;
 678         else if (c == '1' || c == 'y' || c == 'Y')
 679                 experimEnabled = 1;
 680         else if (c == '2')
 681                 experimEnabled = 2;
 682
 683         return count;
 684 }
 685
 686 static int
 687 linuxExtensionsEnabled_read(char *page, char **start, off_t off,
 688                             int count, int *eof, void *data)
 689 {
 690         int len;
 691
 692         len = sprintf(page, "%d\n", linuxExtEnabled);
 693         len -= off;
 694         *start = page + off;
 695
 696         if (len > count)
 697                 len = count;
 698         else
 699                 *eof = 1;
 700
 701         if (len < 0)
 702                 len = 0;
 703
 704         return len;
 705 }
 706 static int
 707 linuxExtensionsEnabled_write(struct file *file, const char __user *buffer,
 708                              unsigned long count, void *data)
 709 {
 710         char c;
 711         int rc;
 712
 713         rc = get_user(c, buffer);
 714         if (rc)
 715                 return rc;
 716         if (c == '0' || c == 'n' || c == 'N')
 717                 linuxExtEnabled = 0;
 718         else if (c == '1' || c == 'y' || c == 'Y')
 719                 linuxExtEnabled = 1;
 720
 721         return count;
 722 }
 723
 724
 725 static int
 726 lookupFlag_read(char *page, char **start, off_t off,
 727                 int count, int *eof, void *data)
 728 {
 729         int len;
 730
 731         len = sprintf(page, "%d\n", lookupCacheEnabled);
 732
 733         len -= off;
 734         *start = page + off;
 735
 736         if (len > count)
 737                 len = count;
 738         else
 739                 *eof = 1;
 740
 741         if (len < 0)
 742                 len = 0;
 743
 744         return len;
 745 }
 746 static int
 747 lookupFlag_write(struct file *file, const char __user *buffer,
 748                     unsigned long count, void *data)
 749 {
 750         char c;
 751         int rc;
 752
 753         rc = get_user(c, buffer);
 754         if (rc)
 755                 return rc;
 756         if (c == '0' || c == 'n' || c == 'N')
 757                 lookupCacheEnabled = 0;
 758         else if (c == '1' || c == 'y' || c == 'Y')
 759                 lookupCacheEnabled = 1;
 760
 761         return count;
 762 }
 763 static int
 764 traceSMB_read(char *page, char **start, off_t off, int count,
 765               int *eof, void *data)
 766 {
 767         int len;
 768
 769         len = sprintf(page, "%d\n", traceSMB);
 770
 771         len -= off;
 772         *start = page + off;
 773
 774         if (len > count)
 775                 len = count;
 776         else
 777                 *eof = 1;
 778
 779         if (len < 0)
 780                 len = 0;
 781
 782         return len;
 783 }
 784 static int
 785 traceSMB_write(struct file *file, const char __user *buffer,
 786                unsigned long count, void *data)
 787 {
 788         char c;
 789         int rc;
 790
 791         rc = get_user(c, buffer);
 792         if (rc)
 793                 return rc;
 794         if (c == '0' || c == 'n' || c == 'N')
 795                 traceSMB = 0;
 796         else if (c == '1' || c == 'y' || c == 'Y')
 797                 traceSMB = 1;
 798
 799         return count;
 800 }
 801
 802 static int
 803 multiuser_mount_read(char *page, char **start, off_t off,
 804                      int count, int *eof, void *data)
 805 {
 806         int len;
 807
 808         len = sprintf(page, "%d\n", multiuser_mount);
 809
 810         len -= off;
 811         *start = page + off;
 812
 813         if (len > count)
 814                 len = count;
 815         else
 816                 *eof = 1;
 817
 818         if (len < 0)
 819                 len = 0;
 820
 821         return len;
 822 }
 823 static int
 824 multiuser_mount_write(struct file *file, const char __user *buffer,
 825                       unsigned long count, void *data)
 826 {
 827         char c;
 828         int rc;
 829
 830         rc = get_user(c, buffer);
 831         if (rc)
 832                 return rc;
 833         if (c == '0' || c == 'n' || c == 'N')
 834                 multiuser_mount = 0;
 835         else if (c == '1' || c == 'y' || c == 'Y')
 836                 multiuser_mount = 1;
 837
 838         return count;
 839 }
 840
 841 static int
 842 security_flags_read(char *page, char **start, off_t off,
 843                        int count, int *eof, void *data)
 844 {
 845         int len;
 846
 847         len = sprintf(page, "0x%x\n", extended_security);
 848
 849         len -= off;
 850         *start = page + off;
 851
 852         if (len > count)
 853                 len = count;
 854         else
 855                 *eof = 1;
 856
 857         if (len < 0)
 858                 len = 0;
 859
 860         return len;
 861 }
 862 static int
 863 security_flags_write(struct file *file, const char __user *buffer,
 864                         unsigned long count, void *data)
 865 {
 866         unsigned int flags;
 867         char flags_string[12];
 868         char c;
 869
 870         if ((count < 1) || (count > 11))
 871                 return -EINVAL;
 872
 873         memset(flags_string, 0, 12);
 874
 875         if (copy_from_user(flags_string, buffer, count))
 876                 return -EFAULT;
 877
 878         if (count < 3) {
 879                 /* single char or single char followed by null */
 880                 c = flags_string[0];
 881                 if (c == '0' || c == 'n' || c == 'N') {
 882                         extended_security = CIFSSEC_DEF; /* default */
 883                         return count;
 884                 } else if (c == '1' || c == 'y' || c == 'Y') {
 885                         extended_security = CIFSSEC_MAX;
 886                         return count;
 887                 } else if (!isdigit(c)) {
 888                         cERROR(1, ("invalid flag %c", c));
 889                         return -EINVAL;
 890                 }
 891         }
 892         /* else we have a number */
 893
 894         flags = simple_strtoul(flags_string, NULL, 0);
 895
 896         cFYI(1, ("sec flags 0x%x", flags));
 897
 898         if (flags <= 0)  {
 899                 cERROR(1, ("invalid security flags %s", flags_string));
 900                 return -EINVAL;
 901         }
 902
 903         if (flags & ~CIFSSEC_MASK) {
 904                 cERROR(1, ("attempt to set unsupported security flags 0x%x",
 905                         flags & ~CIFSSEC_MASK));
 906                 return -EINVAL;
 907         }
 908         /* flags look ok - update the global security flags for cifs module */
 909         extended_security = flags;
 910         if (extended_security & CIFSSEC_MUST_SIGN) {
 911                 /* requiring signing implies signing is allowed */
 912                 extended_security |= CIFSSEC_MAY_SIGN;
 913                 cFYI(1, ("packet signing now required"));
 914         } else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
 915                 cFYI(1, ("packet signing disabled"));
 916         }
 917         /* BB should we turn on MAY flags for other MUST options? */
 918         return count;
 919 }
 920 #else
 921 inline void cifs_proc_init(void)
 922 {
 923 }
 924
 925 inline void cifs_proc_clean(void)
 926 {
 927 }
 928 #endif /* PROC_FS */