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