?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Staging: ipack: dereferencing freed memory
[linux-2.6.git] / fs / cifs / cifs_debug.c
blob2704646294166bec7edf9c006c98d5229a1eaab9
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(void *buf)
62 {
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 }
70
71 void cifs_dump_mids(struct TCP_Server_Info *server)
72 {
73 struct list_head *tmp;
74 struct mid_q_entry *mid_entry;
75
76 if (server == NULL)
77 return;
78
79 cERROR(1, "Dump pending requests:");
80 spin_lock(&GlobalMid_Lock);
81 list_for_each(tmp, &server->pending_mid_q) {
82 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
83 cERROR(1, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu",
84 mid_entry->mid_state,
85 le16_to_cpu(mid_entry->command),
86 mid_entry->pid,
87 mid_entry->callback_data,
88 mid_entry->mid);
89 #ifdef CONFIG_CIFS_STATS2
90 cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",
91 mid_entry->large_buf,
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, 62);
102 }
103 }
104 spin_unlock(&GlobalMid_Lock);
105 }
106 #endif /* CONFIG_CIFS_DEBUG2 */
107
108 #ifdef CONFIG_PROC_FS
109 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
110 {
111 struct list_head *tmp1, *tmp2, *tmp3;
112 struct mid_q_entry *mid_entry;
113 struct TCP_Server_Info *server;
114 struct cifs_ses *ses;
115 struct cifs_tcon *tcon;
116 int i, j;
117 __u32 dev_type;
118
119 seq_puts(m,
120 "Display Internal CIFS Data Structures for Debugging\n"
121 "---------------------------------------------------\n");
122 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
123 seq_printf(m, "Features:");
124 #ifdef CONFIG_CIFS_DFS_UPCALL
125 seq_printf(m, " dfs");
126 #endif
127 #ifdef CONFIG_CIFS_FSCACHE
128 seq_printf(m, " fscache");
129 #endif
130 #ifdef CONFIG_CIFS_WEAK_PW_HASH
131 seq_printf(m, " lanman");
132 #endif
133 #ifdef CONFIG_CIFS_POSIX
134 seq_printf(m, " posix");
135 #endif
136 #ifdef CONFIG_CIFS_UPCALL
137 seq_printf(m, " spnego");
138 #endif
139 #ifdef CONFIG_CIFS_XATTR
140 seq_printf(m, " xattr");
141 #endif
142 #ifdef CONFIG_CIFS_ACL
143 seq_printf(m, " acl");
144 #endif
145 seq_putc(m, '\n');
146 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
147 seq_printf(m, "Servers:");
148
149 i = 0;
150 spin_lock(&cifs_tcp_ses_lock);
151 list_for_each(tmp1, &cifs_tcp_ses_list) {
152 server = list_entry(tmp1, struct TCP_Server_Info,
153 tcp_ses_list);
154 i++;
155 list_for_each(tmp2, &server->smb_ses_list) {
156 ses = list_entry(tmp2, struct cifs_ses,
157 smb_ses_list);
158 if ((ses->serverDomain == NULL) ||
159 (ses->serverOS == NULL) ||
160 (ses->serverNOS == NULL)) {
161 seq_printf(m, "\n%d) entry for %s not fully "
162 "displayed\n\t", i, ses->serverName);
163 } else {
164 seq_printf(m,
165 "\n%d) Name: %s Domain: %s Uses: %d OS:"
166 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
167 " session status: %d\t",
168 i, ses->serverName, ses->serverDomain,
169 ses->ses_count, ses->serverOS, ses->serverNOS,
170 ses->capabilities, ses->status);
171 }
172 seq_printf(m, "TCP status: %d\n\tLocal Users To "
173 "Server: %d SecMode: 0x%x Req On Wire: %d",
174 server->tcpStatus, server->srv_count,
175 server->sec_mode, in_flight(server));
176
177 #ifdef CONFIG_CIFS_STATS2
178 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
179 atomic_read(&server->in_send),
180 atomic_read(&server->num_waiters));
181 #endif
182
183 seq_puts(m, "\n\tShares:");
184 j = 0;
185 list_for_each(tmp3, &ses->tcon_list) {
186 tcon = list_entry(tmp3, struct cifs_tcon,
187 tcon_list);
188 ++j;
189 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
190 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
191 tcon->treeName, tcon->tc_count);
192 if (tcon->nativeFileSystem) {
193 seq_printf(m, "Type: %s ",
194 tcon->nativeFileSystem);
195 }
196 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
197 "\nPathComponentMax: %d Status: 0x%d",
198 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
199 le32_to_cpu(tcon->fsAttrInfo.Attributes),
200 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
201 tcon->tidStatus);
202 if (dev_type == FILE_DEVICE_DISK)
203 seq_puts(m, " type: DISK ");
204 else if (dev_type == FILE_DEVICE_CD_ROM)
205 seq_puts(m, " type: CDROM ");
206 else
207 seq_printf(m, " type: %d ", dev_type);
208
209 if (tcon->need_reconnect)
210 seq_puts(m, "\tDISCONNECTED ");
211 seq_putc(m, '\n');
212 }
213
214 seq_puts(m, "\n\tMIDs:\n");
215
216 spin_lock(&GlobalMid_Lock);
217 list_for_each(tmp3, &server->pending_mid_q) {
218 mid_entry = list_entry(tmp3, struct mid_q_entry,
219 qhead);
220 seq_printf(m, "\tState: %d com: %d pid:"
221 " %d cbdata: %p mid %llu\n",
222 mid_entry->mid_state,
223 le16_to_cpu(mid_entry->command),
224 mid_entry->pid,
225 mid_entry->callback_data,
226 mid_entry->mid);
227 }
228 spin_unlock(&GlobalMid_Lock);
229 }
230 }
231 spin_unlock(&cifs_tcp_ses_lock);
232 seq_putc(m, '\n');
233
234 /* BB add code to dump additional info such as TCP session info now */
235 return 0;
236 }
237
238 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
239 {
240 return single_open(file, cifs_debug_data_proc_show, NULL);
241 }
242
243 static const struct file_operations cifs_debug_data_proc_fops = {
244 .owner = THIS_MODULE,
245 .open = cifs_debug_data_proc_open,
246 .read = seq_read,
247 .llseek = seq_lseek,
248 .release = single_release,
249 };
250
251 #ifdef CONFIG_CIFS_STATS
252 static ssize_t cifs_stats_proc_write(struct file *file,
253 const char __user *buffer, size_t count, loff_t *ppos)
254 {
255 char c;
256 int rc;
257 struct list_head *tmp1, *tmp2, *tmp3;
258 struct TCP_Server_Info *server;
259 struct cifs_ses *ses;
260 struct cifs_tcon *tcon;
261
262 rc = get_user(c, buffer);
263 if (rc)
264 return rc;
265
266 if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
267 #ifdef CONFIG_CIFS_STATS2
268 atomic_set(&totBufAllocCount, 0);
269 atomic_set(&totSmBufAllocCount, 0);
270 #endif /* CONFIG_CIFS_STATS2 */
271 spin_lock(&cifs_tcp_ses_lock);
272 list_for_each(tmp1, &cifs_tcp_ses_list) {
273 server = list_entry(tmp1, struct TCP_Server_Info,
274 tcp_ses_list);
275 list_for_each(tmp2, &server->smb_ses_list) {
276 ses = list_entry(tmp2, struct cifs_ses,
277 smb_ses_list);
278 list_for_each(tmp3, &ses->tcon_list) {
279 tcon = list_entry(tmp3,
280 struct cifs_tcon,
281 tcon_list);
282 atomic_set(&tcon->num_smbs_sent, 0);
283 atomic_set(&tcon->num_writes, 0);
284 atomic_set(&tcon->num_reads, 0);
285 atomic_set(&tcon->num_oplock_brks, 0);
286 atomic_set(&tcon->num_opens, 0);
287 atomic_set(&tcon->num_posixopens, 0);
288 atomic_set(&tcon->num_posixmkdirs, 0);
289 atomic_set(&tcon->num_closes, 0);
290 atomic_set(&tcon->num_deletes, 0);
291 atomic_set(&tcon->num_mkdirs, 0);
292 atomic_set(&tcon->num_rmdirs, 0);
293 atomic_set(&tcon->num_renames, 0);
294 atomic_set(&tcon->num_t2renames, 0);
295 atomic_set(&tcon->num_ffirst, 0);
296 atomic_set(&tcon->num_fnext, 0);
297 atomic_set(&tcon->num_fclose, 0);
298 atomic_set(&tcon->num_hardlinks, 0);
299 atomic_set(&tcon->num_symlinks, 0);
300 atomic_set(&tcon->num_locks, 0);
301 }
302 }
303 }
304 spin_unlock(&cifs_tcp_ses_lock);
305 }
306
307 return count;
308 }
309
310 static int cifs_stats_proc_show(struct seq_file *m, void *v)
311 {
312 int i;
313 struct list_head *tmp1, *tmp2, *tmp3;
314 struct TCP_Server_Info *server;
315 struct cifs_ses *ses;
316 struct cifs_tcon *tcon;
317
318 seq_printf(m,
319 "Resources in use\nCIFS Session: %d\n",
320 sesInfoAllocCount.counter);
321 seq_printf(m, "Share (unique mount targets): %d\n",
322 tconInfoAllocCount.counter);
323 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
324 bufAllocCount.counter,
325 cifs_min_rcv + tcpSesAllocCount.counter);
326 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
327 smBufAllocCount.counter, cifs_min_small);
328 #ifdef CONFIG_CIFS_STATS2
329 seq_printf(m, "Total Large %d Small %d Allocations\n",
330 atomic_read(&totBufAllocCount),
331 atomic_read(&totSmBufAllocCount));
332 #endif /* CONFIG_CIFS_STATS2 */
333
334 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
335 seq_printf(m,
336 "\n%d session %d share reconnects\n",
337 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
338
339 seq_printf(m,
340 "Total vfs operations: %d maximum at one time: %d\n",
341 GlobalCurrentXid, GlobalMaxActiveXid);
342
343 i = 0;
344 spin_lock(&cifs_tcp_ses_lock);
345 list_for_each(tmp1, &cifs_tcp_ses_list) {
346 server = list_entry(tmp1, struct TCP_Server_Info,
347 tcp_ses_list);
348 list_for_each(tmp2, &server->smb_ses_list) {
349 ses = list_entry(tmp2, struct cifs_ses,
350 smb_ses_list);
351 list_for_each(tmp3, &ses->tcon_list) {
352 tcon = list_entry(tmp3,
353 struct cifs_tcon,
354 tcon_list);
355 i++;
356 seq_printf(m, "\n%d) %s", i, tcon->treeName);
357 if (tcon->need_reconnect)
358 seq_puts(m, "\tDISCONNECTED ");
359 seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
360 atomic_read(&tcon->num_smbs_sent),
361 atomic_read(&tcon->num_oplock_brks));
362 seq_printf(m, "\nReads: %d Bytes: %lld",
363 atomic_read(&tcon->num_reads),
364 (long long)(tcon->bytes_read));
365 seq_printf(m, "\nWrites: %d Bytes: %lld",
366 atomic_read(&tcon->num_writes),
367 (long long)(tcon->bytes_written));
368 seq_printf(m, "\nFlushes: %d",
369 atomic_read(&tcon->num_flushes));
370 seq_printf(m, "\nLocks: %d HardLinks: %d "
371 "Symlinks: %d",
372 atomic_read(&tcon->num_locks),
373 atomic_read(&tcon->num_hardlinks),
374 atomic_read(&tcon->num_symlinks));
375 seq_printf(m, "\nOpens: %d Closes: %d "
376 "Deletes: %d",
377 atomic_read(&tcon->num_opens),
378 atomic_read(&tcon->num_closes),
379 atomic_read(&tcon->num_deletes));
380 seq_printf(m, "\nPosix Opens: %d "
381 "Posix Mkdirs: %d",
382 atomic_read(&tcon->num_posixopens),
383 atomic_read(&tcon->num_posixmkdirs));
384 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
385 atomic_read(&tcon->num_mkdirs),
386 atomic_read(&tcon->num_rmdirs));
387 seq_printf(m, "\nRenames: %d T2 Renames %d",
388 atomic_read(&tcon->num_renames),
389 atomic_read(&tcon->num_t2renames));
390 seq_printf(m, "\nFindFirst: %d FNext %d "
391 "FClose %d",
392 atomic_read(&tcon->num_ffirst),
393 atomic_read(&tcon->num_fnext),
394 atomic_read(&tcon->num_fclose));
395 }
396 }
397 }
398 spin_unlock(&cifs_tcp_ses_lock);
399
400 seq_putc(m, '\n');
401 return 0;
402 }
403
404 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
405 {
406 return single_open(file, cifs_stats_proc_show, NULL);
407 }
408
409 static const struct file_operations cifs_stats_proc_fops = {
410 .owner = THIS_MODULE,
411 .open = cifs_stats_proc_open,
412 .read = seq_read,
413 .llseek = seq_lseek,
414 .release = single_release,
415 .write = cifs_stats_proc_write,
416 };
417 #endif /* STATS */
418
419 static struct proc_dir_entry *proc_fs_cifs;
420 static const struct file_operations cifsFYI_proc_fops;
421 static const struct file_operations cifs_lookup_cache_proc_fops;
422 static const struct file_operations traceSMB_proc_fops;
423 static const struct file_operations cifs_multiuser_mount_proc_fops;
424 static const struct file_operations cifs_security_flags_proc_fops;
425 static const struct file_operations cifs_linux_ext_proc_fops;
426
427 void
428 cifs_proc_init(void)
429 {
430 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
431 if (proc_fs_cifs == NULL)
432 return;
433
434 proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
435
436 #ifdef CONFIG_CIFS_STATS
437 proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
438 #endif /* STATS */
439 proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
440 proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
441 proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
442 &cifs_linux_ext_proc_fops);
443 proc_create("MultiuserMount", 0, proc_fs_cifs,
444 &cifs_multiuser_mount_proc_fops);
445 proc_create("SecurityFlags", 0, proc_fs_cifs,
446 &cifs_security_flags_proc_fops);
447 proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
448 &cifs_lookup_cache_proc_fops);
449 }
450
451 void
452 cifs_proc_clean(void)
453 {
454 if (proc_fs_cifs == NULL)
455 return;
456
457 remove_proc_entry("DebugData", proc_fs_cifs);
458 remove_proc_entry("cifsFYI", proc_fs_cifs);
459 remove_proc_entry("traceSMB", proc_fs_cifs);
460 #ifdef CONFIG_CIFS_STATS
461 remove_proc_entry("Stats", proc_fs_cifs);
462 #endif
463 remove_proc_entry("MultiuserMount", proc_fs_cifs);
464 remove_proc_entry("SecurityFlags", proc_fs_cifs);
465 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
466 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
467 remove_proc_entry("fs/cifs", NULL);
468 }
469
470 static int cifsFYI_proc_show(struct seq_file *m, void *v)
471 {
472 seq_printf(m, "%d\n", cifsFYI);
473 return 0;
474 }
475
476 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
477 {
478 return single_open(file, cifsFYI_proc_show, NULL);
479 }
480
481 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
482 size_t count, loff_t *ppos)
483 {
484 char c;
485 int rc;
486
487 rc = get_user(c, buffer);
488 if (rc)
489 return rc;
490 if (c == '0' || c == 'n' || c == 'N')
491 cifsFYI = 0;
492 else if (c == '1' || c == 'y' || c == 'Y')
493 cifsFYI = 1;
494 else if ((c > '1') && (c <= '9'))
495 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
496
497 return count;
498 }
499
500 static const struct file_operations cifsFYI_proc_fops = {
501 .owner = THIS_MODULE,
502 .open = cifsFYI_proc_open,
503 .read = seq_read,
504 .llseek = seq_lseek,
505 .release = single_release,
506 .write = cifsFYI_proc_write,
507 };
508
509 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
510 {
511 seq_printf(m, "%d\n", linuxExtEnabled);
512 return 0;
513 }
514
515 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
516 {
517 return single_open(file, cifs_linux_ext_proc_show, NULL);
518 }
519
520 static ssize_t cifs_linux_ext_proc_write(struct file *file,
521 const char __user *buffer, size_t count, loff_t *ppos)
522 {
523 char c;
524 int rc;
525
526 rc = get_user(c, buffer);
527 if (rc)
528 return rc;
529 if (c == '0' || c == 'n' || c == 'N')
530 linuxExtEnabled = 0;
531 else if (c == '1' || c == 'y' || c == 'Y')
532 linuxExtEnabled = 1;
533
534 return count;
535 }
536
537 static const struct file_operations cifs_linux_ext_proc_fops = {
538 .owner = THIS_MODULE,
539 .open = cifs_linux_ext_proc_open,
540 .read = seq_read,
541 .llseek = seq_lseek,
542 .release = single_release,
543 .write = cifs_linux_ext_proc_write,
544 };
545
546 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
547 {
548 seq_printf(m, "%d\n", lookupCacheEnabled);
549 return 0;
550 }
551
552 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
553 {
554 return single_open(file, cifs_lookup_cache_proc_show, NULL);
555 }
556
557 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
558 const char __user *buffer, size_t count, loff_t *ppos)
559 {
560 char c;
561 int rc;
562
563 rc = get_user(c, buffer);
564 if (rc)
565 return rc;
566 if (c == '0' || c == 'n' || c == 'N')
567 lookupCacheEnabled = 0;
568 else if (c == '1' || c == 'y' || c == 'Y')
569 lookupCacheEnabled = 1;
570
571 return count;
572 }
573
574 static const struct file_operations cifs_lookup_cache_proc_fops = {
575 .owner = THIS_MODULE,
576 .open = cifs_lookup_cache_proc_open,
577 .read = seq_read,
578 .llseek = seq_lseek,
579 .release = single_release,
580 .write = cifs_lookup_cache_proc_write,
581 };
582
583 static int traceSMB_proc_show(struct seq_file *m, void *v)
584 {
585 seq_printf(m, "%d\n", traceSMB);
586 return 0;
587 }
588
589 static int traceSMB_proc_open(struct inode *inode, struct file *file)
590 {
591 return single_open(file, traceSMB_proc_show, NULL);
592 }
593
594 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
595 size_t count, loff_t *ppos)
596 {
597 char c;
598 int rc;
599
600 rc = get_user(c, buffer);
601 if (rc)
602 return rc;
603 if (c == '0' || c == 'n' || c == 'N')
604 traceSMB = 0;
605 else if (c == '1' || c == 'y' || c == 'Y')
606 traceSMB = 1;
607
608 return count;
609 }
610
611 static const struct file_operations traceSMB_proc_fops = {
612 .owner = THIS_MODULE,
613 .open = traceSMB_proc_open,
614 .read = seq_read,
615 .llseek = seq_lseek,
616 .release = single_release,
617 .write = traceSMB_proc_write,
618 };
619
620 static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
621 {
622 seq_printf(m, "%d\n", multiuser_mount);
623 return 0;
624 }
625
626 static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
627 {
628 return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
629 }
630
631 static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
632 const char __user *buffer, size_t count, loff_t *ppos)
633 {
634 char c;
635 int rc;
636 static bool warned;
637
638 rc = get_user(c, buffer);
639 if (rc)
640 return rc;
641 if (c == '0' || c == 'n' || c == 'N')
642 multiuser_mount = 0;
643 else if (c == '1' || c == 'y' || c == 'Y') {
644 multiuser_mount = 1;
645 if (!warned) {
646 warned = true;
647 printk(KERN_WARNING "CIFS VFS: The legacy multiuser "
648 "mount code is scheduled to be deprecated in "
649 "3.5. Please switch to using the multiuser "
650 "mount option.");
651 }
652 }
653
654 return count;
655 }
656
657 static const struct file_operations cifs_multiuser_mount_proc_fops = {
658 .owner = THIS_MODULE,
659 .open = cifs_multiuser_mount_proc_open,
660 .read = seq_read,
661 .llseek = seq_lseek,
662 .release = single_release,
663 .write = cifs_multiuser_mount_proc_write,
664 };
665
666 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
667 {
668 seq_printf(m, "0x%x\n", global_secflags);
669 return 0;
670 }
671
672 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
673 {
674 return single_open(file, cifs_security_flags_proc_show, NULL);
675 }
676
677 static ssize_t cifs_security_flags_proc_write(struct file *file,
678 const char __user *buffer, size_t count, loff_t *ppos)
679 {
680 unsigned int flags;
681 char flags_string[12];
682 char c;
683
684 if ((count < 1) || (count > 11))
685 return -EINVAL;
686
687 memset(flags_string, 0, 12);
688
689 if (copy_from_user(flags_string, buffer, count))
690 return -EFAULT;
691
692 if (count < 3) {
693 /* single char or single char followed by null */
694 c = flags_string[0];
695 if (c == '0' || c == 'n' || c == 'N') {
696 global_secflags = CIFSSEC_DEF; /* default */
697 return count;
698 } else if (c == '1' || c == 'y' || c == 'Y') {
699 global_secflags = CIFSSEC_MAX;
700 return count;
701 } else if (!isdigit(c)) {
702 cERROR(1, "invalid flag %c", c);
703 return -EINVAL;
704 }
705 }
706 /* else we have a number */
707
708 flags = simple_strtoul(flags_string, NULL, 0);
709
710 cFYI(1, "sec flags 0x%x", flags);
711
712 if (flags <= 0) {
713 cERROR(1, "invalid security flags %s", flags_string);
714 return -EINVAL;
715 }
716
717 if (flags & ~CIFSSEC_MASK) {
718 cERROR(1, "attempt to set unsupported security flags 0x%x",
719 flags & ~CIFSSEC_MASK);
720 return -EINVAL;
721 }
722 /* flags look ok - update the global security flags for cifs module */
723 global_secflags = flags;
724 if (global_secflags & CIFSSEC_MUST_SIGN) {
725 /* requiring signing implies signing is allowed */
726 global_secflags |= CIFSSEC_MAY_SIGN;
727 cFYI(1, "packet signing now required");
728 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
729 cFYI(1, "packet signing disabled");
730 }
731 /* BB should we turn on MAY flags for other MUST options? */
732 return count;
733 }
734
735 static const struct file_operations cifs_security_flags_proc_fops = {
736 .owner = THIS_MODULE,
737 .open = cifs_security_flags_proc_open,
738 .read = seq_read,
739 .llseek = seq_lseek,
740 .release = single_release,
741 .write = cifs_security_flags_proc_write,
742 };
743 #else
744 inline void cifs_proc_init(void)
745 {
746 }
747
748 inline void cifs_proc_clean(void)
749 {
750 }
751 #endif /* PROC_FS */
Linus' kernel tree