[CIFS] Kerberos support not considered experimental anymore
[linux-2.6.git] / 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                 cERROR(1, ("State: %d Cmd: %d Pid: %d Tsk: %p Mid %d",
83                         mid_entry->midState,
84                         (int)mid_entry->command,
85                         mid_entry->pid,
86                         mid_entry->tsk,
87                         mid_entry->mid));
88 #ifdef CONFIG_CIFS_STATS2
89                 cERROR(1, ("IsLarge: %d buf: %p time rcv: %ld now: %ld",
90                         mid_entry->largeBuf,
91                         mid_entry->resp_buf,
92                         mid_entry->when_received,
93                         jiffies));
94 #endif /* STATS2 */
95                 cERROR(1, ("IsMult: %d IsEnd: %d", mid_entry->multiRsp,
96                           mid_entry->multiEnd));
97                 if (mid_entry->resp_buf) {
98                         cifs_dump_detail(mid_entry->resp_buf);
99                         cifs_dump_mem("existing buf: ",
100                                 mid_entry->resp_buf, 62);
101                 }
102         }
103         spin_unlock(&GlobalMid_Lock);
104 }
105 #endif /* CONFIG_CIFS_DEBUG2 */
106
107 #ifdef CONFIG_PROC_FS
108 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
109 {
110         struct list_head *tmp;
111         struct list_head *tmp1;
112         struct mid_q_entry *mid_entry;
113         struct cifsSesInfo *ses;
114         struct cifsTconInfo *tcon;
115         int i;
116
117         seq_puts(m,
118                     "Display Internal CIFS Data Structures for Debugging\n"
119                     "---------------------------------------------------\n");
120         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
121         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
122         seq_printf(m, "Servers:");
123
124         i = 0;
125         read_lock(&GlobalSMBSeslock);
126         list_for_each(tmp, &GlobalSMBSessionList) {
127                 i++;
128                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
129                 if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
130                    (ses->serverNOS == NULL)) {
131                         seq_printf(m, "\nentry for %s not fully "
132                                         "displayed\n\t", ses->serverName);
133                 } else {
134                         seq_printf(m,
135                                     "\n%d) Name: %s  Domain: %s Mounts: %d OS:"
136                                     " %s  \n\tNOS: %s\tCapability: 0x%x\n\tSMB"
137                                     " session status: %d\t",
138                                 i, ses->serverName, ses->serverDomain,
139                                 atomic_read(&ses->inUse),
140                                 ses->serverOS, ses->serverNOS,
141                                 ses->capabilities, ses->status);
142                 }
143                 if (ses->server) {
144                         seq_printf(m, "TCP status: %d\n\tLocal Users To "
145                                     "Server: %d SecMode: 0x%x Req On Wire: %d",
146                                 ses->server->tcpStatus,
147                                 atomic_read(&ses->server->socketUseCount),
148                                 ses->server->secMode,
149                                 atomic_read(&ses->server->inFlight));
150
151 #ifdef CONFIG_CIFS_STATS2
152                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
153                                 atomic_read(&ses->server->inSend),
154                                 atomic_read(&ses->server->num_waiters));
155 #endif
156
157                         seq_puts(m, "\nMIDs:\n");
158
159                         spin_lock(&GlobalMid_Lock);
160                         list_for_each(tmp1, &ses->server->pending_mid_q) {
161                                 mid_entry = list_entry(tmp1, struct
162                                         mid_q_entry,
163                                         qhead);
164                                 seq_printf(m, "State: %d com: %d pid:"
165                                                 " %d tsk: %p mid %d\n",
166                                                 mid_entry->midState,
167                                                 (int)mid_entry->command,
168                                                 mid_entry->pid,
169                                                 mid_entry->tsk,
170                                                 mid_entry->mid);
171                         }
172                         spin_unlock(&GlobalMid_Lock);
173                 }
174
175         }
176         read_unlock(&GlobalSMBSeslock);
177         seq_putc(m, '\n');
178
179         seq_puts(m, "Shares:");
180
181         i = 0;
182         read_lock(&GlobalSMBSeslock);
183         list_for_each(tmp, &GlobalTreeConnectionList) {
184                 __u32 dev_type;
185                 i++;
186                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
187                 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
188                 seq_printf(m, "\n%d) %s Uses: %d ", i,
189                                  tcon->treeName, atomic_read(&tcon->useCount));
190                 if (tcon->nativeFileSystem) {
191                         seq_printf(m, "Type: %s ",
192                                          tcon->nativeFileSystem);
193                 }
194                 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
195                                  "\nPathComponentMax: %d Status: %d",
196                             le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
197                             le32_to_cpu(tcon->fsAttrInfo.Attributes),
198                             le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
199                             tcon->tidStatus);
200                 if (dev_type == FILE_DEVICE_DISK)
201                         seq_puts(m, " type: DISK ");
202                 else if (dev_type == FILE_DEVICE_CD_ROM)
203                         seq_puts(m, " type: CDROM ");
204                 else
205                         seq_printf(m, " type: %d ", dev_type);
206
207                 if (tcon->tidStatus == CifsNeedReconnect)
208                         seq_puts(m, "\tDISCONNECTED ");
209         }
210         read_unlock(&GlobalSMBSeslock);
211
212         seq_putc(m, '\n');
213
214         /* BB add code to dump additional info such as TCP session info now */
215         return 0;
216 }
217
218 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
219 {
220         return single_open(file, cifs_debug_data_proc_show, NULL);
221 }
222
223 static const struct file_operations cifs_debug_data_proc_fops = {
224         .owner          = THIS_MODULE,
225         .open           = cifs_debug_data_proc_open,
226         .read           = seq_read,
227         .llseek         = seq_lseek,
228         .release        = single_release,
229 };
230
231 #ifdef CONFIG_CIFS_STATS
232 static ssize_t cifs_stats_proc_write(struct file *file,
233                 const char __user *buffer, size_t count, loff_t *ppos)
234 {
235         char c;
236         int rc;
237         struct list_head *tmp;
238         struct cifsTconInfo *tcon;
239
240         rc = get_user(c, buffer);
241         if (rc)
242                 return rc;
243
244         if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
245                 read_lock(&GlobalSMBSeslock);
246 #ifdef CONFIG_CIFS_STATS2
247                 atomic_set(&totBufAllocCount, 0);
248                 atomic_set(&totSmBufAllocCount, 0);
249 #endif /* CONFIG_CIFS_STATS2 */
250                 list_for_each(tmp, &GlobalTreeConnectionList) {
251                         tcon = list_entry(tmp, struct cifsTconInfo,
252                                         cifsConnectionList);
253                         atomic_set(&tcon->num_smbs_sent, 0);
254                         atomic_set(&tcon->num_writes, 0);
255                         atomic_set(&tcon->num_reads, 0);
256                         atomic_set(&tcon->num_oplock_brks, 0);
257                         atomic_set(&tcon->num_opens, 0);
258                         atomic_set(&tcon->num_closes, 0);
259                         atomic_set(&tcon->num_deletes, 0);
260                         atomic_set(&tcon->num_mkdirs, 0);
261                         atomic_set(&tcon->num_rmdirs, 0);
262                         atomic_set(&tcon->num_renames, 0);
263                         atomic_set(&tcon->num_t2renames, 0);
264                         atomic_set(&tcon->num_ffirst, 0);
265                         atomic_set(&tcon->num_fnext, 0);
266                         atomic_set(&tcon->num_fclose, 0);
267                         atomic_set(&tcon->num_hardlinks, 0);
268                         atomic_set(&tcon->num_symlinks, 0);
269                         atomic_set(&tcon->num_locks, 0);
270                 }
271                 read_unlock(&GlobalSMBSeslock);
272         }
273
274         return count;
275 }
276
277 static int cifs_stats_proc_show(struct seq_file *m, void *v)
278 {
279         int i;
280         struct list_head *tmp;
281         struct cifsTconInfo *tcon;
282
283         seq_printf(m,
284                         "Resources in use\nCIFS Session: %d\n",
285                         sesInfoAllocCount.counter);
286         seq_printf(m, "Share (unique mount targets): %d\n",
287                         tconInfoAllocCount.counter);
288         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
289                         bufAllocCount.counter,
290                         cifs_min_rcv + tcpSesAllocCount.counter);
291         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
292                         smBufAllocCount.counter, cifs_min_small);
293 #ifdef CONFIG_CIFS_STATS2
294         seq_printf(m, "Total Large %d Small %d Allocations\n",
295                                 atomic_read(&totBufAllocCount),
296                                 atomic_read(&totSmBufAllocCount));
297 #endif /* CONFIG_CIFS_STATS2 */
298
299         seq_printf(m, "Operations (MIDs): %d\n", midCount.counter);
300         seq_printf(m,
301                 "\n%d session %d share reconnects\n",
302                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
303
304         seq_printf(m,
305                 "Total vfs operations: %d maximum at one time: %d\n",
306                 GlobalCurrentXid, GlobalMaxActiveXid);
307
308         i = 0;
309         read_lock(&GlobalSMBSeslock);
310         list_for_each(tmp, &GlobalTreeConnectionList) {
311                 i++;
312                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
313                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
314                 if (tcon->tidStatus == CifsNeedReconnect)
315                         seq_puts(m, "\tDISCONNECTED ");
316                 seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
317                         atomic_read(&tcon->num_smbs_sent),
318                         atomic_read(&tcon->num_oplock_brks));
319                 seq_printf(m, "\nReads:  %d Bytes: %lld",
320                         atomic_read(&tcon->num_reads),
321                         (long long)(tcon->bytes_read));
322                 seq_printf(m, "\nWrites: %d Bytes: %lld",
323                         atomic_read(&tcon->num_writes),
324                         (long long)(tcon->bytes_written));
325                 seq_printf(m,
326                         "\nLocks: %d HardLinks: %d Symlinks: %d",
327                         atomic_read(&tcon->num_locks),
328                         atomic_read(&tcon->num_hardlinks),
329                         atomic_read(&tcon->num_symlinks));
330
331                 seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
332                         atomic_read(&tcon->num_opens),
333                         atomic_read(&tcon->num_closes),
334                         atomic_read(&tcon->num_deletes));
335                 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
336                         atomic_read(&tcon->num_mkdirs),
337                         atomic_read(&tcon->num_rmdirs));
338                 seq_printf(m, "\nRenames: %d T2 Renames %d",
339                         atomic_read(&tcon->num_renames),
340                         atomic_read(&tcon->num_t2renames));
341                 seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
342                         atomic_read(&tcon->num_ffirst),
343                         atomic_read(&tcon->num_fnext),
344                         atomic_read(&tcon->num_fclose));
345         }
346         read_unlock(&GlobalSMBSeslock);
347
348         seq_putc(m, '\n');
349         return 0;
350 }
351
352 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
353 {
354         return single_open(file, cifs_stats_proc_show, NULL);
355 }
356
357 static const struct file_operations cifs_stats_proc_fops = {
358         .owner          = THIS_MODULE,
359         .open           = cifs_stats_proc_open,
360         .read           = seq_read,
361         .llseek         = seq_lseek,
362         .release        = single_release,
363         .write          = cifs_stats_proc_write,
364 };
365 #endif /* STATS */
366
367 static struct proc_dir_entry *proc_fs_cifs;
368 static const struct file_operations cifsFYI_proc_fops;
369 static const struct file_operations cifs_oplock_proc_fops;
370 static const struct file_operations cifs_lookup_cache_proc_fops;
371 static const struct file_operations traceSMB_proc_fops;
372 static const struct file_operations cifs_multiuser_mount_proc_fops;
373 static const struct file_operations cifs_security_flags_proc_fops;
374 static const struct file_operations cifs_experimental_proc_fops;
375 static const struct file_operations cifs_linux_ext_proc_fops;
376
377 void
378 cifs_proc_init(void)
379 {
380         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
381         if (proc_fs_cifs == NULL)
382                 return;
383
384         proc_fs_cifs->owner = THIS_MODULE;
385         proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
386
387 #ifdef CONFIG_CIFS_STATS
388         proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
389 #endif /* STATS */
390         proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
391         proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
392         proc_create("OplockEnabled", 0, proc_fs_cifs, &cifs_oplock_proc_fops);
393         proc_create("Experimental", 0, proc_fs_cifs,
394                     &cifs_experimental_proc_fops);
395         proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
396                     &cifs_linux_ext_proc_fops);
397         proc_create("MultiuserMount", 0, proc_fs_cifs,
398                     &cifs_multiuser_mount_proc_fops);
399         proc_create("SecurityFlags", 0, proc_fs_cifs,
400                     &cifs_security_flags_proc_fops);
401         proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
402                     &cifs_lookup_cache_proc_fops);
403 }
404
405 void
406 cifs_proc_clean(void)
407 {
408         if (proc_fs_cifs == NULL)
409                 return;
410
411         remove_proc_entry("DebugData", proc_fs_cifs);
412         remove_proc_entry("cifsFYI", proc_fs_cifs);
413         remove_proc_entry("traceSMB", proc_fs_cifs);
414 #ifdef CONFIG_CIFS_STATS
415         remove_proc_entry("Stats", proc_fs_cifs);
416 #endif
417         remove_proc_entry("MultiuserMount", proc_fs_cifs);
418         remove_proc_entry("OplockEnabled", proc_fs_cifs);
419         remove_proc_entry("SecurityFlags", proc_fs_cifs);
420         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
421         remove_proc_entry("Experimental", proc_fs_cifs);
422         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
423         remove_proc_entry("fs/cifs", NULL);
424 }
425
426 static int cifsFYI_proc_show(struct seq_file *m, void *v)
427 {
428         seq_printf(m, "%d\n", cifsFYI);
429         return 0;
430 }
431
432 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
433 {
434         return single_open(file, cifsFYI_proc_show, NULL);
435 }
436
437 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
438                 size_t count, loff_t *ppos)
439 {
440         char c;
441         int rc;
442
443         rc = get_user(c, buffer);
444         if (rc)
445                 return rc;
446         if (c == '0' || c == 'n' || c == 'N')
447                 cifsFYI = 0;
448         else if (c == '1' || c == 'y' || c == 'Y')
449                 cifsFYI = 1;
450         else if ((c > '1') && (c <= '9'))
451                 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
452
453         return count;
454 }
455
456 static const struct file_operations cifsFYI_proc_fops = {
457         .owner          = THIS_MODULE,
458         .open           = cifsFYI_proc_open,
459         .read           = seq_read,
460         .llseek         = seq_lseek,
461         .release        = single_release,
462         .write          = cifsFYI_proc_write,
463 };
464
465 static int cifs_oplock_proc_show(struct seq_file *m, void *v)
466 {
467         seq_printf(m, "%d\n", oplockEnabled);
468         return 0;
469 }
470
471 static int cifs_oplock_proc_open(struct inode *inode, struct file *file)
472 {
473         return single_open(file, cifs_oplock_proc_show, NULL);
474 }
475
476 static ssize_t cifs_oplock_proc_write(struct file *file,
477                 const char __user *buffer, size_t count, loff_t *ppos)
478 {
479         char c;
480         int rc;
481
482         rc = get_user(c, buffer);
483         if (rc)
484                 return rc;
485         if (c == '0' || c == 'n' || c == 'N')
486                 oplockEnabled = 0;
487         else if (c == '1' || c == 'y' || c == 'Y')
488                 oplockEnabled = 1;
489
490         return count;
491 }
492
493 static const struct file_operations cifs_oplock_proc_fops = {
494         .owner          = THIS_MODULE,
495         .open           = cifs_oplock_proc_open,
496         .read           = seq_read,
497         .llseek         = seq_lseek,
498         .release        = single_release,
499         .write          = cifs_oplock_proc_write,
500 };
501
502 static int cifs_experimental_proc_show(struct seq_file *m, void *v)
503 {
504         seq_printf(m, "%d\n", experimEnabled);
505         return 0;
506 }
507
508 static int cifs_experimental_proc_open(struct inode *inode, struct file *file)
509 {
510         return single_open(file, cifs_experimental_proc_show, NULL);
511 }
512
513 static ssize_t cifs_experimental_proc_write(struct file *file,
514                 const char __user *buffer, size_t count, loff_t *ppos)
515 {
516         char c;
517         int rc;
518
519         rc = get_user(c, buffer);
520         if (rc)
521                 return rc;
522         if (c == '0' || c == 'n' || c == 'N')
523                 experimEnabled = 0;
524         else if (c == '1' || c == 'y' || c == 'Y')
525                 experimEnabled = 1;
526         else if (c == '2')
527                 experimEnabled = 2;
528
529         return count;
530 }
531
532 static const struct file_operations cifs_experimental_proc_fops = {
533         .owner          = THIS_MODULE,
534         .open           = cifs_experimental_proc_open,
535         .read           = seq_read,
536         .llseek         = seq_lseek,
537         .release        = single_release,
538         .write          = cifs_experimental_proc_write,
539 };
540
541 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
542 {
543         seq_printf(m, "%d\n", linuxExtEnabled);
544         return 0;
545 }
546
547 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
548 {
549         return single_open(file, cifs_linux_ext_proc_show, NULL);
550 }
551
552 static ssize_t cifs_linux_ext_proc_write(struct file *file,
553                 const char __user *buffer, size_t count, loff_t *ppos)
554 {
555         char c;
556         int rc;
557
558         rc = get_user(c, buffer);
559         if (rc)
560                 return rc;
561         if (c == '0' || c == 'n' || c == 'N')
562                 linuxExtEnabled = 0;
563         else if (c == '1' || c == 'y' || c == 'Y')
564                 linuxExtEnabled = 1;
565
566         return count;
567 }
568
569 static const struct file_operations cifs_linux_ext_proc_fops = {
570         .owner          = THIS_MODULE,
571         .open           = cifs_linux_ext_proc_open,
572         .read           = seq_read,
573         .llseek         = seq_lseek,
574         .release        = single_release,
575         .write          = cifs_linux_ext_proc_write,
576 };
577
578 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
579 {
580         seq_printf(m, "%d\n", lookupCacheEnabled);
581         return 0;
582 }
583
584 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
585 {
586         return single_open(file, cifs_lookup_cache_proc_show, NULL);
587 }
588
589 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
590                 const char __user *buffer, size_t count, loff_t *ppos)
591 {
592         char c;
593         int rc;
594
595         rc = get_user(c, buffer);
596         if (rc)
597                 return rc;
598         if (c == '0' || c == 'n' || c == 'N')
599                 lookupCacheEnabled = 0;
600         else if (c == '1' || c == 'y' || c == 'Y')
601                 lookupCacheEnabled = 1;
602
603         return count;
604 }
605
606 static const struct file_operations cifs_lookup_cache_proc_fops = {
607         .owner          = THIS_MODULE,
608         .open           = cifs_lookup_cache_proc_open,
609         .read           = seq_read,
610         .llseek         = seq_lseek,
611         .release        = single_release,
612         .write          = cifs_lookup_cache_proc_write,
613 };
614
615 static int traceSMB_proc_show(struct seq_file *m, void *v)
616 {
617         seq_printf(m, "%d\n", traceSMB);
618         return 0;
619 }
620
621 static int traceSMB_proc_open(struct inode *inode, struct file *file)
622 {
623         return single_open(file, traceSMB_proc_show, NULL);
624 }
625
626 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
627                 size_t count, loff_t *ppos)
628 {
629         char c;
630         int rc;
631
632         rc = get_user(c, buffer);
633         if (rc)
634                 return rc;
635         if (c == '0' || c == 'n' || c == 'N')
636                 traceSMB = 0;
637         else if (c == '1' || c == 'y' || c == 'Y')
638                 traceSMB = 1;
639
640         return count;
641 }
642
643 static const struct file_operations traceSMB_proc_fops = {
644         .owner          = THIS_MODULE,
645         .open           = traceSMB_proc_open,
646         .read           = seq_read,
647         .llseek         = seq_lseek,
648         .release        = single_release,
649         .write          = traceSMB_proc_write,
650 };
651
652 static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
653 {
654         seq_printf(m, "%d\n", multiuser_mount);
655         return 0;
656 }
657
658 static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
659 {
660         return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
661 }
662
663 static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
664                 const char __user *buffer, size_t count, loff_t *ppos)
665 {
666         char c;
667         int rc;
668
669         rc = get_user(c, buffer);
670         if (rc)
671                 return rc;
672         if (c == '0' || c == 'n' || c == 'N')
673                 multiuser_mount = 0;
674         else if (c == '1' || c == 'y' || c == 'Y')
675                 multiuser_mount = 1;
676
677         return count;
678 }
679
680 static const struct file_operations cifs_multiuser_mount_proc_fops = {
681         .owner          = THIS_MODULE,
682         .open           = cifs_multiuser_mount_proc_open,
683         .read           = seq_read,
684         .llseek         = seq_lseek,
685         .release        = single_release,
686         .write          = cifs_multiuser_mount_proc_write,
687 };
688
689 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
690 {
691         seq_printf(m, "0x%x\n", extended_security);
692         return 0;
693 }
694
695 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
696 {
697         return single_open(file, cifs_security_flags_proc_show, NULL);
698 }
699
700 static ssize_t cifs_security_flags_proc_write(struct file *file,
701                 const char __user *buffer, size_t count, loff_t *ppos)
702 {
703         unsigned int flags;
704         char flags_string[12];
705         char c;
706
707         if ((count < 1) || (count > 11))
708                 return -EINVAL;
709
710         memset(flags_string, 0, 12);
711
712         if (copy_from_user(flags_string, buffer, count))
713                 return -EFAULT;
714
715         if (count < 3) {
716                 /* single char or single char followed by null */
717                 c = flags_string[0];
718                 if (c == '0' || c == 'n' || c == 'N') {
719                         extended_security = CIFSSEC_DEF; /* default */
720                         return count;
721                 } else if (c == '1' || c == 'y' || c == 'Y') {
722                         extended_security = CIFSSEC_MAX;
723                         return count;
724                 } else if (!isdigit(c)) {
725                         cERROR(1, ("invalid flag %c", c));
726                         return -EINVAL;
727                 }
728         }
729         /* else we have a number */
730
731         flags = simple_strtoul(flags_string, NULL, 0);
732
733         cFYI(1, ("sec flags 0x%x", flags));
734
735         if (flags <= 0)  {
736                 cERROR(1, ("invalid security flags %s", flags_string));
737                 return -EINVAL;
738         }
739
740         if (flags & ~CIFSSEC_MASK) {
741                 cERROR(1, ("attempt to set unsupported security flags 0x%x",
742                         flags & ~CIFSSEC_MASK));
743                 return -EINVAL;
744         }
745         /* flags look ok - update the global security flags for cifs module */
746         extended_security = flags;
747         if (extended_security & CIFSSEC_MUST_SIGN) {
748                 /* requiring signing implies signing is allowed */
749                 extended_security |= CIFSSEC_MAY_SIGN;
750                 cFYI(1, ("packet signing now required"));
751         } else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
752                 cFYI(1, ("packet signing disabled"));
753         }
754         /* BB should we turn on MAY flags for other MUST options? */
755         return count;
756 }
757
758 static const struct file_operations cifs_security_flags_proc_fops = {
759         .owner          = THIS_MODULE,
760         .open           = cifs_security_flags_proc_open,
761         .read           = seq_read,
762         .llseek         = seq_lseek,
763         .release        = single_release,
764         .write          = cifs_security_flags_proc_write,
765 };
766 #else
767 inline void cifs_proc_init(void)
768 {
769 }
770
771 inline void cifs_proc_clean(void)
772 {
773 }
774 #endif /* PROC_FS */