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                 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,
 102                                         62 /* fixme */);
 103                         }
 104                 }
 105         }
 106         spin_unlock(&GlobalMid_Lock);
 107 }
 108 #endif /* CONFIG_CIFS_DEBUG2 */
 109
 110 #ifdef CONFIG_PROC_FS
 111 static int
 112 cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 113                      int count, int *eof, void *data)
 114 {
 115         struct list_head *tmp;
 116         struct list_head *tmp1;
 117         struct mid_q_entry *mid_entry;
 118         struct cifsSesInfo *ses;
 119         struct cifsTconInfo *tcon;
 120         int i;
 121         int length = 0;
 122         char *original_buf = buf;
 123
 124         *beginBuffer = buf + offset;
 125
 126         length =
 127             sprintf(buf,
 128                     "Display Internal CIFS Data Structures for Debugging\n"
 129                     "---------------------------------------------------\n");
 130         buf += length;
 131         length = sprintf(buf, "CIFS Version %s\n", CIFS_VERSION);
 132         buf += length;
 133         length = sprintf(buf,
 134                 "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 135         buf += length;
 136         length = sprintf(buf, "Servers:");
 137         buf += length;
 138
 139         i = 0;
 140         read_lock(&GlobalSMBSeslock);
 141         list_for_each(tmp, &GlobalSMBSessionList) {
 142                 i++;
 143                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 144                 if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
 145                    (ses->serverNOS == NULL)) {
 146                         buf += sprintf(buf, "\nentry for %s not fully "
 147                                         "displayed\n\t", ses->serverName);
 148                 } else {
 149                         length =
 150                             sprintf(buf,
 151                                     "\n%d) Name: %s  Domain: %s Mounts: %d OS:"
 152                                     " %s  \n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 153                                     " session status: %d\t",
 154                                 i, ses->serverName, ses->serverDomain,
 155                                 atomic_read(&ses->inUse),
 156                                 ses->serverOS, ses->serverNOS,
 157                                 ses->capabilities, ses->status);
 158                         buf += length;
 159                 }
 160                 if (ses->server) {
 161                         buf += sprintf(buf, "TCP status: %d\n\tLocal Users To "
 162                                     "Server: %d SecMode: 0x%x Req On Wire: %d",
 163                                 ses->server->tcpStatus,
 164                                 atomic_read(&ses->server->socketUseCount),
 165                                 ses->server->secMode,
 166                                 atomic_read(&ses->server->inFlight));
 167
 168 #ifdef CONFIG_CIFS_STATS2
 169                         buf += sprintf(buf, " In Send: %d In MaxReq Wait: %d",
 170                                 atomic_read(&ses->server->inSend),
 171                                 atomic_read(&ses->server->num_waiters));
 172 #endif
 173
 174                         length = sprintf(buf, "\nMIDs:\n");
 175                         buf += length;
 176
 177                         spin_lock(&GlobalMid_Lock);
 178                         list_for_each(tmp1, &ses->server->pending_mid_q) {
 179                                 mid_entry = list_entry(tmp1, struct
 180                                         mid_q_entry,
 181                                         qhead);
 182                                 if (mid_entry) {
 183                                         length = sprintf(buf,
 184                                                         "State: %d com: %d pid:"
 185                                                         " %d tsk: %p mid %d\n",
 186                                                         mid_entry->midState,
 187                                                         (int)mid_entry->command,
 188                                                         mid_entry->pid,
 189                                                         mid_entry->tsk,
 190                                                         mid_entry->mid);
 191                                         buf += length;
 192                                 }
 193                         }
 194                         spin_unlock(&GlobalMid_Lock);
 195                 }
 196
 197         }
 198         read_unlock(&GlobalSMBSeslock);
 199         sprintf(buf, "\n");
 200         buf++;
 201
 202         length = sprintf(buf, "Shares:");
 203         buf += length;
 204
 205         i = 0;
 206         read_lock(&GlobalSMBSeslock);
 207         list_for_each(tmp, &GlobalTreeConnectionList) {
 208                 __u32 dev_type;
 209                 i++;
 210                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 211                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 212                 length =
 213                     sprintf(buf,
 214                             "\n%d) %s Uses: %d Type: %s DevInfo: 0x%x "
 215                             "Attributes: 0x%x\nPathComponentMax: %d Status: %d",
 216                             i, tcon->treeName,
 217                             atomic_read(&tcon->useCount),
 218                             tcon->nativeFileSystem,
 219                             le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 220                             le32_to_cpu(tcon->fsAttrInfo.Attributes),
 221                             le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 222                             tcon->tidStatus);
 223                 buf += length;
 224                 if (dev_type == FILE_DEVICE_DISK)
 225                         length = sprintf(buf, " type: DISK ");
 226                 else if (dev_type == FILE_DEVICE_CD_ROM)
 227                         length = sprintf(buf, " type: CDROM ");
 228                 else
 229                         length =
 230                             sprintf(buf, " type: %d ", dev_type);
 231                 buf += length;
 232                 if (tcon->tidStatus == CifsNeedReconnect) {
 233                         buf += sprintf(buf, "\tDISCONNECTED ");
 234                         length += 14;
 235                 }
 236         }
 237         read_unlock(&GlobalSMBSeslock);
 238
 239         length = sprintf(buf, "\n");
 240         buf += length;
 241
 242         /* BB add code to dump additional info such as TCP session info now */
 243         /* Now calculate total size of returned data */
 244         length = buf - original_buf;
 245
 246         if (offset + count >= length)
 247                 *eof = 1;
 248         if (length < offset) {
 249                 *eof = 1;
 250                 return 0;
 251         } else {
 252                 length = length - offset;
 253         }
 254         if (length > count)
 255                 length = count;
 256
 257         return length;
 258 }
 259
 260 #ifdef CONFIG_CIFS_STATS
 261
 262 static int
 263 cifs_stats_write(struct file *file, const char __user *buffer,
 264                  unsigned long count, void *data)
 265 {
 266         char c;
 267         int rc;
 268         struct list_head *tmp;
 269         struct cifsTconInfo *tcon;
 270
 271         rc = get_user(c, buffer);
 272         if (rc)
 273                 return rc;
 274
 275         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
 276                 read_lock(&GlobalSMBSeslock);
 277 #ifdef CONFIG_CIFS_STATS2
 278                 atomic_set(&totBufAllocCount, 0);
 279                 atomic_set(&totSmBufAllocCount, 0);
 280 #endif /* CONFIG_CIFS_STATS2 */
 281                 list_for_each(tmp, &GlobalTreeConnectionList) {
 282                         tcon = list_entry(tmp, struct cifsTconInfo,
 283                                         cifsConnectionList);
 284                         atomic_set(&tcon->num_smbs_sent, 0);
 285                         atomic_set(&tcon->num_writes, 0);
 286                         atomic_set(&tcon->num_reads, 0);
 287                         atomic_set(&tcon->num_oplock_brks, 0);
 288                         atomic_set(&tcon->num_opens, 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                 read_unlock(&GlobalSMBSeslock);
 303         }
 304
 305         return count;
 306 }
 307
 308 static int
 309 cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
 310                   int count, int *eof, void *data)
 311 {
 312         int item_length, i, length;
 313         struct list_head *tmp;
 314         struct cifsTconInfo *tcon;
 315
 316         *beginBuffer = buf + offset;
 317
 318         length = sprintf(buf,
 319                         "Resources in use\nCIFS Session: %d\n",
 320                         sesInfoAllocCount.counter);
 321         buf += length;
 322         item_length =
 323                 sprintf(buf, "Share (unique mount targets): %d\n",
 324                         tconInfoAllocCount.counter);
 325         length += item_length;
 326         buf += item_length;
 327         item_length =
 328                 sprintf(buf, "SMB Request/Response Buffer: %d Pool size: %d\n",
 329                         bufAllocCount.counter,
 330                         cifs_min_rcv + tcpSesAllocCount.counter);
 331         length += item_length;
 332         buf += item_length;
 333         item_length =
 334                 sprintf(buf, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 335                         smBufAllocCount.counter, cifs_min_small);
 336         length += item_length;
 337         buf += item_length;
 338 #ifdef CONFIG_CIFS_STATS2
 339         item_length = sprintf(buf, "Total Large %d Small %d Allocations\n",
 340                                 atomic_read(&totBufAllocCount),
 341                                 atomic_read(&totSmBufAllocCount));
 342         length += item_length;
 343         buf += item_length;
 344 #endif /* CONFIG_CIFS_STATS2 */
 345
 346         item_length =
 347                 sprintf(buf, "Operations (MIDs): %d\n",
 348                         midCount.counter);
 349         length += item_length;
 350         buf += item_length;
 351         item_length = sprintf(buf,
 352                 "\n%d session %d share reconnects\n",
 353                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 354         length += item_length;
 355         buf += item_length;
 356
 357         item_length = sprintf(buf,
 358                 "Total vfs operations: %d maximum at one time: %d\n",
 359                 GlobalCurrentXid, GlobalMaxActiveXid);
 360         length += item_length;
 361         buf += item_length;
 362
 363         i = 0;
 364         read_lock(&GlobalSMBSeslock);
 365         list_for_each(tmp, &GlobalTreeConnectionList) {
 366                 i++;
 367                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 368                 item_length = sprintf(buf, "\n%d) %s", i, tcon->treeName);
 369                 buf += item_length;
 370                 length += item_length;
 371                 if (tcon->tidStatus == CifsNeedReconnect) {
 372                         buf += sprintf(buf, "\tDISCONNECTED ");
 373                         length += 14;
 374                 }
 375                 item_length = sprintf(buf, "\nSMBs: %d Oplock Breaks: %d",
 376                         atomic_read(&tcon->num_smbs_sent),
 377                         atomic_read(&tcon->num_oplock_brks));
 378                 buf += item_length;
 379                 length += item_length;
 380                 item_length = sprintf(buf, "\nReads:  %d Bytes: %lld",
 381                         atomic_read(&tcon->num_reads),
 382                         (long long)(tcon->bytes_read));
 383                 buf += item_length;
 384                 length += item_length;
 385                 item_length = sprintf(buf, "\nWrites: %d Bytes: %lld",
 386                         atomic_read(&tcon->num_writes),
 387                         (long long)(tcon->bytes_written));
 388                 buf += item_length;
 389                 length += item_length;
 390                 item_length = sprintf(buf,
 391                         "\nLocks: %d HardLinks: %d Symlinks: %d",
 392                         atomic_read(&tcon->num_locks),
 393                         atomic_read(&tcon->num_hardlinks),
 394                         atomic_read(&tcon->num_symlinks));
 395                 buf += item_length;
 396                 length += item_length;
 397
 398                 item_length = sprintf(buf, "\nOpens: %d Closes: %d Deletes: %d",
 399                         atomic_read(&tcon->num_opens),
 400                         atomic_read(&tcon->num_closes),
 401                         atomic_read(&tcon->num_deletes));
 402                 buf += item_length;
 403                 length += item_length;
 404                 item_length = sprintf(buf, "\nMkdirs: %d Rmdirs: %d",
 405                         atomic_read(&tcon->num_mkdirs),
 406                         atomic_read(&tcon->num_rmdirs));
 407                 buf += item_length;
 408                 length += item_length;
 409                 item_length = sprintf(buf, "\nRenames: %d T2 Renames %d",
 410                         atomic_read(&tcon->num_renames),
 411                         atomic_read(&tcon->num_t2renames));
 412                 buf += item_length;
 413                 length += item_length;
 414                 item_length = sprintf(buf, "\nFindFirst: %d FNext %d FClose %d",
 415                         atomic_read(&tcon->num_ffirst),
 416                         atomic_read(&tcon->num_fnext),
 417                         atomic_read(&tcon->num_fclose));
 418                 buf += item_length;
 419                 length += item_length;
 420         }
 421         read_unlock(&GlobalSMBSeslock);
 422
 423         buf += sprintf(buf, "\n");
 424         length++;
 425
 426         if (offset + count >= length)
 427                 *eof = 1;
 428         if (length < offset) {
 429                 *eof = 1;
 430                 return 0;
 431         } else {
 432                 length = length - offset;
 433         }
 434         if (length > count)
 435                 length = count;
 436
 437         return length;
 438 }
 439 #endif
 440
 441 static struct proc_dir_entry *proc_fs_cifs;
 442 read_proc_t cifs_txanchor_read;
 443 static read_proc_t cifsFYI_read;
 444 static write_proc_t cifsFYI_write;
 445 static read_proc_t oplockEnabled_read;
 446 static write_proc_t oplockEnabled_write;
 447 static read_proc_t lookupFlag_read;
 448 static write_proc_t lookupFlag_write;
 449 static read_proc_t traceSMB_read;
 450 static write_proc_t traceSMB_write;
 451 static read_proc_t multiuser_mount_read;
 452 static write_proc_t multiuser_mount_write;
 453 static read_proc_t security_flags_read;
 454 static write_proc_t security_flags_write;
 455 /* static read_proc_t ntlmv2_enabled_read;
 456 static write_proc_t ntlmv2_enabled_write;
 457 static read_proc_t packet_signing_enabled_read;
 458 static write_proc_t packet_signing_enabled_write;*/
 459 static read_proc_t experimEnabled_read;
 460 static write_proc_t experimEnabled_write;
 461 static read_proc_t linuxExtensionsEnabled_read;
 462 static write_proc_t linuxExtensionsEnabled_write;
 463
 464 void
 465 cifs_proc_init(void)
 466 {
 467         struct proc_dir_entry *pde;
 468
 469         proc_fs_cifs = proc_mkdir("cifs", proc_root_fs);
 470         if (proc_fs_cifs == NULL)
 471                 return;
 472
 473         proc_fs_cifs->owner = THIS_MODULE;
 474         create_proc_read_entry("DebugData", 0, proc_fs_cifs,
 475                                 cifs_debug_data_read, NULL);
 476
 477 #ifdef CONFIG_CIFS_STATS
 478         pde = create_proc_read_entry("Stats", 0, proc_fs_cifs,
 479                                 cifs_stats_read, NULL);
 480         if (pde)
 481                 pde->write_proc = cifs_stats_write;
 482 #endif
 483         pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
 484                                 cifsFYI_read, NULL);
 485         if (pde)
 486                 pde->write_proc = cifsFYI_write;
 487
 488         pde =
 489             create_proc_read_entry("traceSMB", 0, proc_fs_cifs,
 490                                 traceSMB_read, NULL);
 491         if (pde)
 492                 pde->write_proc = traceSMB_write;
 493
 494         pde = create_proc_read_entry("OplockEnabled", 0, proc_fs_cifs,
 495                                 oplockEnabled_read, NULL);
 496         if (pde)
 497                 pde->write_proc = oplockEnabled_write;
 498
 499         pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
 500                                 experimEnabled_read, NULL);
 501         if (pde)
 502                 pde->write_proc = experimEnabled_write;
 503
 504         pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 505                                 linuxExtensionsEnabled_read, NULL);
 506         if (pde)
 507                 pde->write_proc = linuxExtensionsEnabled_write;
 508
 509         pde =
 510             create_proc_read_entry("MultiuserMount", 0, proc_fs_cifs,
 511                                 multiuser_mount_read, NULL);
 512         if (pde)
 513                 pde->write_proc = multiuser_mount_write;
 514
 515         pde =
 516             create_proc_read_entry("SecurityFlags", 0, proc_fs_cifs,
 517                                 security_flags_read, NULL);
 518         if (pde)
 519                 pde->write_proc = security_flags_write;
 520
 521         pde =
 522         create_proc_read_entry("LookupCacheEnabled", 0, proc_fs_cifs,
 523                                 lookupFlag_read, NULL);
 524         if (pde)
 525                 pde->write_proc = lookupFlag_write;
 526
 527 /*      pde =
 528             create_proc_read_entry("NTLMV2Enabled", 0, proc_fs_cifs,
 529                                 ntlmv2_enabled_read, NULL);
 530         if (pde)
 531                 pde->write_proc = ntlmv2_enabled_write;
 532
 533         pde =
 534             create_proc_read_entry("PacketSigningEnabled", 0, proc_fs_cifs,
 535                                 packet_signing_enabled_read, NULL);
 536         if (pde)
 537                 pde->write_proc = packet_signing_enabled_write;*/
 538 }
 539
 540 void
 541 cifs_proc_clean(void)
 542 {
 543         if (proc_fs_cifs == NULL)
 544                 return;
 545
 546         remove_proc_entry("DebugData", proc_fs_cifs);
 547         remove_proc_entry("cifsFYI", proc_fs_cifs);
 548         remove_proc_entry("traceSMB", proc_fs_cifs);
 549 #ifdef CONFIG_CIFS_STATS
 550         remove_proc_entry("Stats", proc_fs_cifs);
 551 #endif
 552         remove_proc_entry("MultiuserMount", proc_fs_cifs);
 553         remove_proc_entry("OplockEnabled", proc_fs_cifs);
 554 /*      remove_proc_entry("NTLMV2Enabled",proc_fs_cifs); */
 555         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 556 /*      remove_proc_entry("PacketSigningEnabled", proc_fs_cifs); */
 557         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 558         remove_proc_entry("Experimental", proc_fs_cifs);
 559         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 560         remove_proc_entry("cifs", proc_root_fs);
 561 }
 562
 563 static int
 564 cifsFYI_read(char *page, char **start, off_t off, int count,
 565              int *eof, void *data)
 566 {
 567         int len;
 568
 569         len = sprintf(page, "%d\n", cifsFYI);
 570
 571         len -= off;
 572         *start = page + off;
 573
 574         if (len > count)
 575                 len = count;
 576         else
 577                 *eof = 1;
 578
 579         if (len < 0)
 580                 len = 0;
 581
 582         return len;
 583 }
 584 static int
 585 cifsFYI_write(struct file *file, const char __user *buffer,
 586               unsigned long count, void *data)
 587 {
 588         char c;
 589         int rc;
 590
 591         rc = get_user(c, buffer);
 592         if (rc)
 593                 return rc;
 594         if (c == '0' || c == 'n' || c == 'N')
 595                 cifsFYI = 0;
 596         else if (c == '1' || c == 'y' || c == 'Y')
 597                 cifsFYI = 1;
 598         else if ((c > '1') && (c <= '9'))
 599                 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
 600
 601         return count;
 602 }
 603
 604 static int
 605 oplockEnabled_read(char *page, char **start, off_t off,
 606                    int count, int *eof, void *data)
 607 {
 608         int len;
 609
 610         len = sprintf(page, "%d\n", oplockEnabled);
 611
 612         len -= off;
 613         *start = page + off;
 614
 615         if (len > count)
 616                 len = count;
 617         else
 618                 *eof = 1;
 619
 620         if (len < 0)
 621                 len = 0;
 622
 623         return len;
 624 }
 625 static int
 626 oplockEnabled_write(struct file *file, const char __user *buffer,
 627                     unsigned long count, void *data)
 628 {
 629         char c;
 630         int rc;
 631
 632         rc = get_user(c, buffer);
 633         if (rc)
 634                 return rc;
 635         if (c == '0' || c == 'n' || c == 'N')
 636                 oplockEnabled = 0;
 637         else if (c == '1' || c == 'y' || c == 'Y')
 638                 oplockEnabled = 1;
 639
 640         return count;
 641 }
 642
 643 static int
 644 experimEnabled_read(char *page, char **start, off_t off,
 645                     int count, int *eof, void *data)
 646 {
 647         int len;
 648
 649         len = sprintf(page, "%d\n", experimEnabled);
 650
 651         len -= off;
 652         *start = page + off;
 653
 654         if (len > count)
 655                 len = count;
 656         else
 657                 *eof = 1;
 658
 659         if (len < 0)
 660                 len = 0;
 661
 662         return len;
 663 }
 664 static int
 665 experimEnabled_write(struct file *file, const char __user *buffer,
 666                      unsigned long count, void *data)
 667 {
 668         char c;
 669         int rc;
 670
 671         rc = get_user(c, buffer);
 672         if (rc)
 673                 return rc;
 674         if (c == '0' || c == 'n' || c == 'N')
 675                 experimEnabled = 0;
 676         else if (c == '1' || c == 'y' || c == 'Y')
 677                 experimEnabled = 1;
 678         else if (c == '2')
 679                 experimEnabled = 2;
 680
 681         return count;
 682 }
 683
 684 static int
 685 linuxExtensionsEnabled_read(char *page, char **start, off_t off,
 686                             int count, int *eof, void *data)
 687 {
 688         int len;
 689
 690         len = sprintf(page, "%d\n", linuxExtEnabled);
 691         len -= off;
 692         *start = page + off;
 693
 694         if (len > count)
 695                 len = count;
 696         else
 697                 *eof = 1;
 698
 699         if (len < 0)
 700                 len = 0;
 701
 702         return len;
 703 }
 704 static int
 705 linuxExtensionsEnabled_write(struct file *file, const char __user *buffer,
 706                              unsigned long count, void *data)
 707 {
 708         char c;
 709         int rc;
 710
 711         rc = get_user(c, buffer);
 712         if (rc)
 713                 return rc;
 714         if (c == '0' || c == 'n' || c == 'N')
 715                 linuxExtEnabled = 0;
 716         else if (c == '1' || c == 'y' || c == 'Y')
 717                 linuxExtEnabled = 1;
 718
 719         return count;
 720 }
 721
 722
 723 static int
 724 lookupFlag_read(char *page, char **start, off_t off,
 725                 int count, int *eof, void *data)
 726 {
 727         int len;
 728
 729         len = sprintf(page, "%d\n", lookupCacheEnabled);
 730
 731         len -= off;
 732         *start = page + off;
 733
 734         if (len > count)
 735                 len = count;
 736         else
 737                 *eof = 1;
 738
 739         if (len < 0)
 740                 len = 0;
 741
 742         return len;
 743 }
 744 static int
 745 lookupFlag_write(struct file *file, const char __user *buffer,
 746                     unsigned long count, void *data)
 747 {
 748         char c;
 749         int rc;
 750
 751         rc = get_user(c, buffer);
 752         if (rc)
 753                 return rc;
 754         if (c == '0' || c == 'n' || c == 'N')
 755                 lookupCacheEnabled = 0;
 756         else if (c == '1' || c == 'y' || c == 'Y')
 757                 lookupCacheEnabled = 1;
 758
 759         return count;
 760 }
 761 static int
 762 traceSMB_read(char *page, char **start, off_t off, int count,
 763               int *eof, void *data)
 764 {
 765         int len;
 766
 767         len = sprintf(page, "%d\n", traceSMB);
 768
 769         len -= off;
 770         *start = page + off;
 771
 772         if (len > count)
 773                 len = count;
 774         else
 775                 *eof = 1;
 776
 777         if (len < 0)
 778                 len = 0;
 779
 780         return len;
 781 }
 782 static int
 783 traceSMB_write(struct file *file, const char __user *buffer,
 784                unsigned long count, void *data)
 785 {
 786         char c;
 787         int rc;
 788
 789         rc = get_user(c, buffer);
 790         if (rc)
 791                 return rc;
 792         if (c == '0' || c == 'n' || c == 'N')
 793                 traceSMB = 0;
 794         else if (c == '1' || c == 'y' || c == 'Y')
 795                 traceSMB = 1;
 796
 797         return count;
 798 }
 799
 800 static int
 801 multiuser_mount_read(char *page, char **start, off_t off,
 802                      int count, int *eof, void *data)
 803 {
 804         int len;
 805
 806         len = sprintf(page, "%d\n", multiuser_mount);
 807
 808         len -= off;
 809         *start = page + off;
 810
 811         if (len > count)
 812                 len = count;
 813         else
 814                 *eof = 1;
 815
 816         if (len < 0)
 817                 len = 0;
 818
 819         return len;
 820 }
 821 static int
 822 multiuser_mount_write(struct file *file, const char __user *buffer,
 823                       unsigned long count, void *data)
 824 {
 825         char c;
 826         int rc;
 827
 828         rc = get_user(c, buffer);
 829         if (rc)
 830                 return rc;
 831         if (c == '0' || c == 'n' || c == 'N')
 832                 multiuser_mount = 0;
 833         else if (c == '1' || c == 'y' || c == 'Y')
 834                 multiuser_mount = 1;
 835
 836         return count;
 837 }
 838
 839 static int
 840 security_flags_read(char *page, char **start, off_t off,
 841                        int count, int *eof, void *data)
 842 {
 843         int len;
 844
 845         len = sprintf(page, "0x%x\n", extended_security);
 846
 847         len -= off;
 848         *start = page + off;
 849
 850         if (len > count)
 851                 len = count;
 852         else
 853                 *eof = 1;
 854
 855         if (len < 0)
 856                 len = 0;
 857
 858         return len;
 859 }
 860 static int
 861 security_flags_write(struct file *file, const char __user *buffer,
 862                         unsigned long count, void *data)
 863 {
 864         unsigned int flags;
 865         char flags_string[12];
 866         char c;
 867
 868         if ((count < 1) || (count > 11))
 869                 return -EINVAL;
 870
 871         memset(flags_string, 0, 12);
 872
 873         if (copy_from_user(flags_string, buffer, count))
 874                 return -EFAULT;
 875
 876         if (count < 3) {
 877                 /* single char or single char followed by null */
 878                 c = flags_string[0];
 879                 if (c == '0' || c == 'n' || c == 'N')
 880                         extended_security = CIFSSEC_DEF; /* default */
 881                 else if (c == '1' || c == 'y' || c == 'Y')
 882                         extended_security = CIFSSEC_MAX;
 883                 return count;
 884         }
 885         /* else we have a number */
 886
 887         flags = simple_strtoul(flags_string, NULL, 0);
 888
 889         cFYI(1, ("sec flags 0x%x", flags));
 890
 891         if (flags <= 0)  {
 892                 cERROR(1, ("invalid security flags %s", flags_string));
 893                 return -EINVAL;
 894         }
 895
 896         if (flags & ~CIFSSEC_MASK) {
 897                 cERROR(1, ("attempt to set unsupported security flags 0x%x",
 898                         flags & ~CIFSSEC_MASK));
 899                 return -EINVAL;
 900         }
 901         /* flags look ok - update the global security flags for cifs module */
 902         extended_security = flags;
 903         if (extended_security & CIFSSEC_MUST_SIGN) {
 904                 /* requiring signing implies signing is allowed */
 905                 extended_security |= CIFSSEC_MAY_SIGN;
 906                 cFYI(1, ("packet signing now required"));
 907         } else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
 908                 cFYI(1, ("packet signing disabled"));
 909         }
 910         /* BB should we turn on MAY flags for other MUST options? */
 911         return count;
 912 }
 913 #endif