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