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 void cifs_dump_detail(void *buf)
  61 {
  62 #ifdef CONFIG_CIFS_DEBUG2
  63         struct smb_hdr *smb = (struct smb_hdr *)buf;
  64
  65         cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",
  66                   smb->Command, smb->Status.CifsError,
  67                   smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  68         cERROR(1, "smb buf %p len %d", smb, smbCalcSize(smb));
  69 #endif /* CONFIG_CIFS_DEBUG2 */
  70 }
  71
  72 void cifs_dump_mids(struct TCP_Server_Info *server)
  73 {
  74 #ifdef CONFIG_CIFS_DEBUG2
  75         struct list_head *tmp;
  76         struct mid_q_entry *mid_entry;
  77
  78         if (server == NULL)
  79                 return;
  80
  81         cERROR(1, "Dump pending requests:");
  82         spin_lock(&GlobalMid_Lock);
  83         list_for_each(tmp, &server->pending_mid_q) {
  84                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  85                 cERROR(1, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu",
  86                         mid_entry->mid_state,
  87                         le16_to_cpu(mid_entry->command),
  88                         mid_entry->pid,
  89                         mid_entry->callback_data,
  90                         mid_entry->mid);
  91 #ifdef CONFIG_CIFS_STATS2
  92                 cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",
  93                         mid_entry->large_buf,
  94                         mid_entry->resp_buf,
  95                         mid_entry->when_received,
  96                         jiffies);
  97 #endif /* STATS2 */
  98                 cERROR(1, "IsMult: %d IsEnd: %d", mid_entry->multiRsp,
  99                           mid_entry->multiEnd);
 100                 if (mid_entry->resp_buf) {
 101                         cifs_dump_detail(mid_entry->resp_buf);
 102                         cifs_dump_mem("existing buf: ",
 103                                 mid_entry->resp_buf, 62);
 104                 }
 105         }
 106         spin_unlock(&GlobalMid_Lock);
 107 #endif /* CONFIG_CIFS_DEBUG2 */
 108 }
 109
 110 #ifdef CONFIG_PROC_FS
 111 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 112 {
 113         struct list_head *tmp1, *tmp2, *tmp3;
 114         struct mid_q_entry *mid_entry;
 115         struct TCP_Server_Info *server;
 116         struct cifs_ses *ses;
 117         struct cifs_tcon *tcon;
 118         int i, j;
 119         __u32 dev_type;
 120
 121         seq_puts(m,
 122                     "Display Internal CIFS Data Structures for Debugging\n"
 123                     "---------------------------------------------------\n");
 124         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 125         seq_printf(m, "Features:");
 126 #ifdef CONFIG_CIFS_DFS_UPCALL
 127         seq_printf(m, " dfs");
 128 #endif
 129 #ifdef CONFIG_CIFS_FSCACHE
 130         seq_printf(m, " fscache");
 131 #endif
 132 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 133         seq_printf(m, " lanman");
 134 #endif
 135 #ifdef CONFIG_CIFS_POSIX
 136         seq_printf(m, " posix");
 137 #endif
 138 #ifdef CONFIG_CIFS_UPCALL
 139         seq_printf(m, " spnego");
 140 #endif
 141 #ifdef CONFIG_CIFS_XATTR
 142         seq_printf(m, " xattr");
 143 #endif
 144 #ifdef CONFIG_CIFS_ACL
 145         seq_printf(m, " acl");
 146 #endif
 147         seq_putc(m, '\n');
 148         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 149         seq_printf(m, "Servers:");
 150
 151         i = 0;
 152         spin_lock(&cifs_tcp_ses_lock);
 153         list_for_each(tmp1, &cifs_tcp_ses_list) {
 154                 server = list_entry(tmp1, struct TCP_Server_Info,
 155                                     tcp_ses_list);
 156                 i++;
 157                 list_for_each(tmp2, &server->smb_ses_list) {
 158                         ses = list_entry(tmp2, struct cifs_ses,
 159                                          smb_ses_list);
 160                         if ((ses->serverDomain == NULL) ||
 161                                 (ses->serverOS == NULL) ||
 162                                 (ses->serverNOS == NULL)) {
 163                                 seq_printf(m, "\n%d) entry for %s not fully "
 164                                            "displayed\n\t", i, ses->serverName);
 165                         } else {
 166                                 seq_printf(m,
 167                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 168                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 169                                     " session status: %d\t",
 170                                 i, ses->serverName, ses->serverDomain,
 171                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 172                                 ses->capabilities, ses->status);
 173                         }
 174                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
 175                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 176                                    server->tcpStatus, server->srv_count,
 177                                    server->sec_mode, in_flight(server));
 178
 179 #ifdef CONFIG_CIFS_STATS2
 180                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 181                                 atomic_read(&server->in_send),
 182                                 atomic_read(&server->num_waiters));
 183 #endif
 184
 185                         seq_puts(m, "\n\tShares:");
 186                         j = 0;
 187                         list_for_each(tmp3, &ses->tcon_list) {
 188                                 tcon = list_entry(tmp3, struct cifs_tcon,
 189                                                   tcon_list);
 190                                 ++j;
 191                                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 192                                 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
 193                                            tcon->treeName, tcon->tc_count);
 194                                 if (tcon->nativeFileSystem) {
 195                                         seq_printf(m, "Type: %s ",
 196                                                    tcon->nativeFileSystem);
 197                                 }
 198                                 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
 199                                         "\nPathComponentMax: %d Status: 0x%d",
 200                                         le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 201                                         le32_to_cpu(tcon->fsAttrInfo.Attributes),
 202                                         le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 203                                         tcon->tidStatus);
 204                                 if (dev_type == FILE_DEVICE_DISK)
 205                                         seq_puts(m, " type: DISK ");
 206                                 else if (dev_type == FILE_DEVICE_CD_ROM)
 207                                         seq_puts(m, " type: CDROM ");
 208                                 else
 209                                         seq_printf(m, " type: %d ", dev_type);
 210
 211                                 if (tcon->need_reconnect)
 212                                         seq_puts(m, "\tDISCONNECTED ");
 213                                 seq_putc(m, '\n');
 214                         }
 215
 216                         seq_puts(m, "\n\tMIDs:\n");
 217
 218                         spin_lock(&GlobalMid_Lock);
 219                         list_for_each(tmp3, &server->pending_mid_q) {
 220                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 221                                         qhead);
 222                                 seq_printf(m, "\tState: %d com: %d pid:"
 223                                               " %d cbdata: %p mid %llu\n",
 224                                               mid_entry->mid_state,
 225                                               le16_to_cpu(mid_entry->command),
 226                                               mid_entry->pid,
 227                                               mid_entry->callback_data,
 228                                               mid_entry->mid);
 229                         }
 230                         spin_unlock(&GlobalMid_Lock);
 231                 }
 232         }
 233         spin_unlock(&cifs_tcp_ses_lock);
 234         seq_putc(m, '\n');
 235
 236         /* BB add code to dump additional info such as TCP session info now */
 237         return 0;
 238 }
 239
 240 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
 241 {
 242         return single_open(file, cifs_debug_data_proc_show, NULL);
 243 }
 244
 245 static const struct file_operations cifs_debug_data_proc_fops = {
 246         .owner          = THIS_MODULE,
 247         .open           = cifs_debug_data_proc_open,
 248         .read           = seq_read,
 249         .llseek         = seq_lseek,
 250         .release        = single_release,
 251 };
 252
 253 #ifdef CONFIG_CIFS_STATS
 254 static ssize_t cifs_stats_proc_write(struct file *file,
 255                 const char __user *buffer, size_t count, loff_t *ppos)
 256 {
 257         char c;
 258         int rc;
 259         struct list_head *tmp1, *tmp2, *tmp3;
 260         struct TCP_Server_Info *server;
 261         struct cifs_ses *ses;
 262         struct cifs_tcon *tcon;
 263
 264         rc = get_user(c, buffer);
 265         if (rc)
 266                 return rc;
 267
 268         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
 269 #ifdef CONFIG_CIFS_STATS2
 270                 atomic_set(&totBufAllocCount, 0);
 271                 atomic_set(&totSmBufAllocCount, 0);
 272 #endif /* CONFIG_CIFS_STATS2 */
 273                 spin_lock(&cifs_tcp_ses_lock);
 274                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 275                         server = list_entry(tmp1, struct TCP_Server_Info,
 276                                             tcp_ses_list);
 277                         list_for_each(tmp2, &server->smb_ses_list) {
 278                                 ses = list_entry(tmp2, struct cifs_ses,
 279                                                  smb_ses_list);
 280                                 list_for_each(tmp3, &ses->tcon_list) {
 281                                         tcon = list_entry(tmp3,
 282                                                           struct cifs_tcon,
 283                                                           tcon_list);
 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_posixopens, 0);
 290                                         atomic_set(&tcon->num_posixmkdirs, 0);
 291                                         atomic_set(&tcon->num_closes, 0);
 292                                         atomic_set(&tcon->num_deletes, 0);
 293                                         atomic_set(&tcon->num_mkdirs, 0);
 294                                         atomic_set(&tcon->num_rmdirs, 0);
 295                                         atomic_set(&tcon->num_renames, 0);
 296                                         atomic_set(&tcon->num_t2renames, 0);
 297                                         atomic_set(&tcon->num_ffirst, 0);
 298                                         atomic_set(&tcon->num_fnext, 0);
 299                                         atomic_set(&tcon->num_fclose, 0);
 300                                         atomic_set(&tcon->num_hardlinks, 0);
 301                                         atomic_set(&tcon->num_symlinks, 0);
 302                                         atomic_set(&tcon->num_locks, 0);
 303                                 }
 304                         }
 305                 }
 306                 spin_unlock(&cifs_tcp_ses_lock);
 307         }
 308
 309         return count;
 310 }
 311
 312 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 313 {
 314         int i;
 315         struct list_head *tmp1, *tmp2, *tmp3;
 316         struct TCP_Server_Info *server;
 317         struct cifs_ses *ses;
 318         struct cifs_tcon *tcon;
 319
 320         seq_printf(m,
 321                         "Resources in use\nCIFS Session: %d\n",
 322                         sesInfoAllocCount.counter);
 323         seq_printf(m, "Share (unique mount targets): %d\n",
 324                         tconInfoAllocCount.counter);
 325         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 326                         bufAllocCount.counter,
 327                         cifs_min_rcv + tcpSesAllocCount.counter);
 328         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 329                         smBufAllocCount.counter, cifs_min_small);
 330 #ifdef CONFIG_CIFS_STATS2
 331         seq_printf(m, "Total Large %d Small %d Allocations\n",
 332                                 atomic_read(&totBufAllocCount),
 333                                 atomic_read(&totSmBufAllocCount));
 334 #endif /* CONFIG_CIFS_STATS2 */
 335
 336         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 337         seq_printf(m,
 338                 "\n%d session %d share reconnects\n",
 339                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 340
 341         seq_printf(m,
 342                 "Total vfs operations: %d maximum at one time: %d\n",
 343                 GlobalCurrentXid, GlobalMaxActiveXid);
 344
 345         i = 0;
 346         spin_lock(&cifs_tcp_ses_lock);
 347         list_for_each(tmp1, &cifs_tcp_ses_list) {
 348                 server = list_entry(tmp1, struct TCP_Server_Info,
 349                                     tcp_ses_list);
 350                 list_for_each(tmp2, &server->smb_ses_list) {
 351                         ses = list_entry(tmp2, struct cifs_ses,
 352                                          smb_ses_list);
 353                         list_for_each(tmp3, &ses->tcon_list) {
 354                                 tcon = list_entry(tmp3,
 355                                                   struct cifs_tcon,
 356                                                   tcon_list);
 357                                 i++;
 358                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 359                                 if (tcon->need_reconnect)
 360                                         seq_puts(m, "\tDISCONNECTED ");
 361                                 seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
 362                                         atomic_read(&tcon->num_smbs_sent),
 363                                         atomic_read(&tcon->num_oplock_brks));
 364                                 seq_printf(m, "\nReads:  %d Bytes: %lld",
 365                                         atomic_read(&tcon->num_reads),
 366                                         (long long)(tcon->bytes_read));
 367                                 seq_printf(m, "\nWrites: %d Bytes: %lld",
 368                                         atomic_read(&tcon->num_writes),
 369                                         (long long)(tcon->bytes_written));
 370                                 seq_printf(m, "\nFlushes: %d",
 371                                         atomic_read(&tcon->num_flushes));
 372                                 seq_printf(m, "\nLocks: %d HardLinks: %d "
 373                                               "Symlinks: %d",
 374                                         atomic_read(&tcon->num_locks),
 375                                         atomic_read(&tcon->num_hardlinks),
 376                                         atomic_read(&tcon->num_symlinks));
 377                                 seq_printf(m, "\nOpens: %d Closes: %d "
 378                                               "Deletes: %d",
 379                                         atomic_read(&tcon->num_opens),
 380                                         atomic_read(&tcon->num_closes),
 381                                         atomic_read(&tcon->num_deletes));
 382                                 seq_printf(m, "\nPosix Opens: %d "
 383                                               "Posix Mkdirs: %d",
 384                                         atomic_read(&tcon->num_posixopens),
 385                                         atomic_read(&tcon->num_posixmkdirs));
 386                                 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
 387                                         atomic_read(&tcon->num_mkdirs),
 388                                         atomic_read(&tcon->num_rmdirs));
 389                                 seq_printf(m, "\nRenames: %d T2 Renames %d",
 390                                         atomic_read(&tcon->num_renames),
 391                                         atomic_read(&tcon->num_t2renames));
 392                                 seq_printf(m, "\nFindFirst: %d FNext %d "
 393                                               "FClose %d",
 394                                         atomic_read(&tcon->num_ffirst),
 395                                         atomic_read(&tcon->num_fnext),
 396                                         atomic_read(&tcon->num_fclose));
 397                         }
 398                 }
 399         }
 400         spin_unlock(&cifs_tcp_ses_lock);
 401
 402         seq_putc(m, '\n');
 403         return 0;
 404 }
 405
 406 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 407 {
 408         return single_open(file, cifs_stats_proc_show, NULL);
 409 }
 410
 411 static const struct file_operations cifs_stats_proc_fops = {
 412         .owner          = THIS_MODULE,
 413         .open           = cifs_stats_proc_open,
 414         .read           = seq_read,
 415         .llseek         = seq_lseek,
 416         .release        = single_release,
 417         .write          = cifs_stats_proc_write,
 418 };
 419 #endif /* STATS */
 420
 421 static struct proc_dir_entry *proc_fs_cifs;
 422 static const struct file_operations cifsFYI_proc_fops;
 423 static const struct file_operations cifs_lookup_cache_proc_fops;
 424 static const struct file_operations traceSMB_proc_fops;
 425 static const struct file_operations cifs_security_flags_proc_fops;
 426 static const struct file_operations cifs_linux_ext_proc_fops;
 427
 428 void
 429 cifs_proc_init(void)
 430 {
 431         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 432         if (proc_fs_cifs == NULL)
 433                 return;
 434
 435         proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
 436
 437 #ifdef CONFIG_CIFS_STATS
 438         proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
 439 #endif /* STATS */
 440         proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
 441         proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
 442         proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
 443                     &cifs_linux_ext_proc_fops);
 444         proc_create("SecurityFlags", 0, proc_fs_cifs,
 445                     &cifs_security_flags_proc_fops);
 446         proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
 447                     &cifs_lookup_cache_proc_fops);
 448 }
 449
 450 void
 451 cifs_proc_clean(void)
 452 {
 453         if (proc_fs_cifs == NULL)
 454                 return;
 455
 456         remove_proc_entry("DebugData", proc_fs_cifs);
 457         remove_proc_entry("cifsFYI", proc_fs_cifs);
 458         remove_proc_entry("traceSMB", proc_fs_cifs);
 459 #ifdef CONFIG_CIFS_STATS
 460         remove_proc_entry("Stats", proc_fs_cifs);
 461 #endif
 462         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 463         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 464         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 465         remove_proc_entry("fs/cifs", NULL);
 466 }
 467
 468 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 469 {
 470         seq_printf(m, "%d\n", cifsFYI);
 471         return 0;
 472 }
 473
 474 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 475 {
 476         return single_open(file, cifsFYI_proc_show, NULL);
 477 }
 478
 479 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 480                 size_t count, loff_t *ppos)
 481 {
 482         char c;
 483         int rc;
 484
 485         rc = get_user(c, buffer);
 486         if (rc)
 487                 return rc;
 488         if (c == '0' || c == 'n' || c == 'N')
 489                 cifsFYI = 0;
 490         else if (c == '1' || c == 'y' || c == 'Y')
 491                 cifsFYI = 1;
 492         else if ((c > '1') && (c <= '9'))
 493                 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
 494
 495         return count;
 496 }
 497
 498 static const struct file_operations cifsFYI_proc_fops = {
 499         .owner          = THIS_MODULE,
 500         .open           = cifsFYI_proc_open,
 501         .read           = seq_read,
 502         .llseek         = seq_lseek,
 503         .release        = single_release,
 504         .write          = cifsFYI_proc_write,
 505 };
 506
 507 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 508 {
 509         seq_printf(m, "%d\n", linuxExtEnabled);
 510         return 0;
 511 }
 512
 513 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 514 {
 515         return single_open(file, cifs_linux_ext_proc_show, NULL);
 516 }
 517
 518 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 519                 const char __user *buffer, size_t count, loff_t *ppos)
 520 {
 521         char c;
 522         int rc;
 523
 524         rc = get_user(c, buffer);
 525         if (rc)
 526                 return rc;
 527         if (c == '0' || c == 'n' || c == 'N')
 528                 linuxExtEnabled = 0;
 529         else if (c == '1' || c == 'y' || c == 'Y')
 530                 linuxExtEnabled = 1;
 531
 532         return count;
 533 }
 534
 535 static const struct file_operations cifs_linux_ext_proc_fops = {
 536         .owner          = THIS_MODULE,
 537         .open           = cifs_linux_ext_proc_open,
 538         .read           = seq_read,
 539         .llseek         = seq_lseek,
 540         .release        = single_release,
 541         .write          = cifs_linux_ext_proc_write,
 542 };
 543
 544 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 545 {
 546         seq_printf(m, "%d\n", lookupCacheEnabled);
 547         return 0;
 548 }
 549
 550 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 551 {
 552         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 553 }
 554
 555 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 556                 const char __user *buffer, size_t count, loff_t *ppos)
 557 {
 558         char c;
 559         int rc;
 560
 561         rc = get_user(c, buffer);
 562         if (rc)
 563                 return rc;
 564         if (c == '0' || c == 'n' || c == 'N')
 565                 lookupCacheEnabled = 0;
 566         else if (c == '1' || c == 'y' || c == 'Y')
 567                 lookupCacheEnabled = 1;
 568
 569         return count;
 570 }
 571
 572 static const struct file_operations cifs_lookup_cache_proc_fops = {
 573         .owner          = THIS_MODULE,
 574         .open           = cifs_lookup_cache_proc_open,
 575         .read           = seq_read,
 576         .llseek         = seq_lseek,
 577         .release        = single_release,
 578         .write          = cifs_lookup_cache_proc_write,
 579 };
 580
 581 static int traceSMB_proc_show(struct seq_file *m, void *v)
 582 {
 583         seq_printf(m, "%d\n", traceSMB);
 584         return 0;
 585 }
 586
 587 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 588 {
 589         return single_open(file, traceSMB_proc_show, NULL);
 590 }
 591
 592 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 593                 size_t count, loff_t *ppos)
 594 {
 595         char c;
 596         int rc;
 597
 598         rc = get_user(c, buffer);
 599         if (rc)
 600                 return rc;
 601         if (c == '0' || c == 'n' || c == 'N')
 602                 traceSMB = 0;
 603         else if (c == '1' || c == 'y' || c == 'Y')
 604                 traceSMB = 1;
 605
 606         return count;
 607 }
 608
 609 static const struct file_operations traceSMB_proc_fops = {
 610         .owner          = THIS_MODULE,
 611         .open           = traceSMB_proc_open,
 612         .read           = seq_read,
 613         .llseek         = seq_lseek,
 614         .release        = single_release,
 615         .write          = traceSMB_proc_write,
 616 };
 617
 618 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 619 {
 620         seq_printf(m, "0x%x\n", global_secflags);
 621         return 0;
 622 }
 623
 624 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 625 {
 626         return single_open(file, cifs_security_flags_proc_show, NULL);
 627 }
 628
 629 static ssize_t cifs_security_flags_proc_write(struct file *file,
 630                 const char __user *buffer, size_t count, loff_t *ppos)
 631 {
 632         unsigned int flags;
 633         char flags_string[12];
 634         char c;
 635
 636         if ((count < 1) || (count > 11))
 637                 return -EINVAL;
 638
 639         memset(flags_string, 0, 12);
 640
 641         if (copy_from_user(flags_string, buffer, count))
 642                 return -EFAULT;
 643
 644         if (count < 3) {
 645                 /* single char or single char followed by null */
 646                 c = flags_string[0];
 647                 if (c == '0' || c == 'n' || c == 'N') {
 648                         global_secflags = CIFSSEC_DEF; /* default */
 649                         return count;
 650                 } else if (c == '1' || c == 'y' || c == 'Y') {
 651                         global_secflags = CIFSSEC_MAX;
 652                         return count;
 653                 } else if (!isdigit(c)) {
 654                         cERROR(1, "invalid flag %c", c);
 655                         return -EINVAL;
 656                 }
 657         }
 658         /* else we have a number */
 659
 660         flags = simple_strtoul(flags_string, NULL, 0);
 661
 662         cFYI(1, "sec flags 0x%x", flags);
 663
 664         if (flags <= 0)  {
 665                 cERROR(1, "invalid security flags %s", flags_string);
 666                 return -EINVAL;
 667         }
 668
 669         if (flags & ~CIFSSEC_MASK) {
 670                 cERROR(1, "attempt to set unsupported security flags 0x%x",
 671                         flags & ~CIFSSEC_MASK);
 672                 return -EINVAL;
 673         }
 674         /* flags look ok - update the global security flags for cifs module */
 675         global_secflags = flags;
 676         if (global_secflags & CIFSSEC_MUST_SIGN) {
 677                 /* requiring signing implies signing is allowed */
 678                 global_secflags |= CIFSSEC_MAY_SIGN;
 679                 cFYI(1, "packet signing now required");
 680         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 681                 cFYI(1, "packet signing disabled");
 682         }
 683         /* BB should we turn on MAY flags for other MUST options? */
 684         return count;
 685 }
 686
 687 static const struct file_operations cifs_security_flags_proc_fops = {
 688         .owner          = THIS_MODULE,
 689         .open           = cifs_security_flags_proc_open,
 690         .read           = seq_read,
 691         .llseek         = seq_lseek,
 692         .release        = single_release,
 693         .write          = cifs_security_flags_proc_write,
 694 };
 695 #else
 696 inline void cifs_proc_init(void)
 697 {
 698 }
 699
 700 inline void cifs_proc_clean(void)
 701 {
 702 }
 703 #endif /* PROC_FS */