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Linux 3.8-rc7
[cris-mirror.git] / fs / cifs / cifs_debug.c
blobd9ea6ede6a7a7e5fbd60aae056cfded4b41b6f18
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 %u", 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 if (server->ops->clear_stats)
286 server->ops->clear_stats(tcon);
287 }
288 }
289 }
290 spin_unlock(&cifs_tcp_ses_lock);
291 }
292
293 return count;
294 }
295
296 static int cifs_stats_proc_show(struct seq_file *m, void *v)
297 {
298 int i;
299 struct list_head *tmp1, *tmp2, *tmp3;
300 struct TCP_Server_Info *server;
301 struct cifs_ses *ses;
302 struct cifs_tcon *tcon;
303
304 seq_printf(m,
305 "Resources in use\nCIFS Session: %d\n",
306 sesInfoAllocCount.counter);
307 seq_printf(m, "Share (unique mount targets): %d\n",
308 tconInfoAllocCount.counter);
309 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
310 bufAllocCount.counter,
311 cifs_min_rcv + tcpSesAllocCount.counter);
312 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
313 smBufAllocCount.counter, cifs_min_small);
314 #ifdef CONFIG_CIFS_STATS2
315 seq_printf(m, "Total Large %d Small %d Allocations\n",
316 atomic_read(&totBufAllocCount),
317 atomic_read(&totSmBufAllocCount));
318 #endif /* CONFIG_CIFS_STATS2 */
319
320 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
321 seq_printf(m,
322 "\n%d session %d share reconnects\n",
323 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
324
325 seq_printf(m,
326 "Total vfs operations: %d maximum at one time: %d\n",
327 GlobalCurrentXid, GlobalMaxActiveXid);
328
329 i = 0;
330 spin_lock(&cifs_tcp_ses_lock);
331 list_for_each(tmp1, &cifs_tcp_ses_list) {
332 server = list_entry(tmp1, struct TCP_Server_Info,
333 tcp_ses_list);
334 list_for_each(tmp2, &server->smb_ses_list) {
335 ses = list_entry(tmp2, struct cifs_ses,
336 smb_ses_list);
337 list_for_each(tmp3, &ses->tcon_list) {
338 tcon = list_entry(tmp3,
339 struct cifs_tcon,
340 tcon_list);
341 i++;
342 seq_printf(m, "\n%d) %s", i, tcon->treeName);
343 if (tcon->need_reconnect)
344 seq_puts(m, "\tDISCONNECTED ");
345 seq_printf(m, "\nSMBs: %d",
346 atomic_read(&tcon->num_smbs_sent));
347 if (server->ops->print_stats)
348 server->ops->print_stats(m, tcon);
349 }
350 }
351 }
352 spin_unlock(&cifs_tcp_ses_lock);
353
354 seq_putc(m, '\n');
355 return 0;
356 }
357
358 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
359 {
360 return single_open(file, cifs_stats_proc_show, NULL);
361 }
362
363 static const struct file_operations cifs_stats_proc_fops = {
364 .owner = THIS_MODULE,
365 .open = cifs_stats_proc_open,
366 .read = seq_read,
367 .llseek = seq_lseek,
368 .release = single_release,
369 .write = cifs_stats_proc_write,
370 };
371 #endif /* STATS */
372
373 static struct proc_dir_entry *proc_fs_cifs;
374 static const struct file_operations cifsFYI_proc_fops;
375 static const struct file_operations cifs_lookup_cache_proc_fops;
376 static const struct file_operations traceSMB_proc_fops;
377 static const struct file_operations cifs_security_flags_proc_fops;
378 static const struct file_operations cifs_linux_ext_proc_fops;
379
380 void
381 cifs_proc_init(void)
382 {
383 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
384 if (proc_fs_cifs == NULL)
385 return;
386
387 proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
388
389 #ifdef CONFIG_CIFS_STATS
390 proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
391 #endif /* STATS */
392 proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
393 proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
394 proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
395 &cifs_linux_ext_proc_fops);
396 proc_create("SecurityFlags", 0, proc_fs_cifs,
397 &cifs_security_flags_proc_fops);
398 proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
399 &cifs_lookup_cache_proc_fops);
400 }
401
402 void
403 cifs_proc_clean(void)
404 {
405 if (proc_fs_cifs == NULL)
406 return;
407
408 remove_proc_entry("DebugData", proc_fs_cifs);
409 remove_proc_entry("cifsFYI", proc_fs_cifs);
410 remove_proc_entry("traceSMB", proc_fs_cifs);
411 #ifdef CONFIG_CIFS_STATS
412 remove_proc_entry("Stats", proc_fs_cifs);
413 #endif
414 remove_proc_entry("SecurityFlags", proc_fs_cifs);
415 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
416 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
417 remove_proc_entry("fs/cifs", NULL);
418 }
419
420 static int cifsFYI_proc_show(struct seq_file *m, void *v)
421 {
422 seq_printf(m, "%d\n", cifsFYI);
423 return 0;
424 }
425
426 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
427 {
428 return single_open(file, cifsFYI_proc_show, NULL);
429 }
430
431 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
432 size_t count, loff_t *ppos)
433 {
434 char c;
435 int rc;
436
437 rc = get_user(c, buffer);
438 if (rc)
439 return rc;
440 if (c == '0' || c == 'n' || c == 'N')
441 cifsFYI = 0;
442 else if (c == '1' || c == 'y' || c == 'Y')
443 cifsFYI = 1;
444 else if ((c > '1') && (c <= '9'))
445 cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
446
447 return count;
448 }
449
450 static const struct file_operations cifsFYI_proc_fops = {
451 .owner = THIS_MODULE,
452 .open = cifsFYI_proc_open,
453 .read = seq_read,
454 .llseek = seq_lseek,
455 .release = single_release,
456 .write = cifsFYI_proc_write,
457 };
458
459 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
460 {
461 seq_printf(m, "%d\n", linuxExtEnabled);
462 return 0;
463 }
464
465 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
466 {
467 return single_open(file, cifs_linux_ext_proc_show, NULL);
468 }
469
470 static ssize_t cifs_linux_ext_proc_write(struct file *file,
471 const char __user *buffer, size_t count, loff_t *ppos)
472 {
473 char c;
474 int rc;
475
476 rc = get_user(c, buffer);
477 if (rc)
478 return rc;
479 if (c == '0' || c == 'n' || c == 'N')
480 linuxExtEnabled = 0;
481 else if (c == '1' || c == 'y' || c == 'Y')
482 linuxExtEnabled = 1;
483
484 return count;
485 }
486
487 static const struct file_operations cifs_linux_ext_proc_fops = {
488 .owner = THIS_MODULE,
489 .open = cifs_linux_ext_proc_open,
490 .read = seq_read,
491 .llseek = seq_lseek,
492 .release = single_release,
493 .write = cifs_linux_ext_proc_write,
494 };
495
496 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
497 {
498 seq_printf(m, "%d\n", lookupCacheEnabled);
499 return 0;
500 }
501
502 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
503 {
504 return single_open(file, cifs_lookup_cache_proc_show, NULL);
505 }
506
507 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
508 const char __user *buffer, size_t count, loff_t *ppos)
509 {
510 char c;
511 int rc;
512
513 rc = get_user(c, buffer);
514 if (rc)
515 return rc;
516 if (c == '0' || c == 'n' || c == 'N')
517 lookupCacheEnabled = 0;
518 else if (c == '1' || c == 'y' || c == 'Y')
519 lookupCacheEnabled = 1;
520
521 return count;
522 }
523
524 static const struct file_operations cifs_lookup_cache_proc_fops = {
525 .owner = THIS_MODULE,
526 .open = cifs_lookup_cache_proc_open,
527 .read = seq_read,
528 .llseek = seq_lseek,
529 .release = single_release,
530 .write = cifs_lookup_cache_proc_write,
531 };
532
533 static int traceSMB_proc_show(struct seq_file *m, void *v)
534 {
535 seq_printf(m, "%d\n", traceSMB);
536 return 0;
537 }
538
539 static int traceSMB_proc_open(struct inode *inode, struct file *file)
540 {
541 return single_open(file, traceSMB_proc_show, NULL);
542 }
543
544 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
545 size_t count, loff_t *ppos)
546 {
547 char c;
548 int rc;
549
550 rc = get_user(c, buffer);
551 if (rc)
552 return rc;
553 if (c == '0' || c == 'n' || c == 'N')
554 traceSMB = 0;
555 else if (c == '1' || c == 'y' || c == 'Y')
556 traceSMB = 1;
557
558 return count;
559 }
560
561 static const struct file_operations traceSMB_proc_fops = {
562 .owner = THIS_MODULE,
563 .open = traceSMB_proc_open,
564 .read = seq_read,
565 .llseek = seq_lseek,
566 .release = single_release,
567 .write = traceSMB_proc_write,
568 };
569
570 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
571 {
572 seq_printf(m, "0x%x\n", global_secflags);
573 return 0;
574 }
575
576 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
577 {
578 return single_open(file, cifs_security_flags_proc_show, NULL);
579 }
580
581 static ssize_t cifs_security_flags_proc_write(struct file *file,
582 const char __user *buffer, size_t count, loff_t *ppos)
583 {
584 unsigned int flags;
585 char flags_string[12];
586 char c;
587
588 if ((count < 1) || (count > 11))
589 return -EINVAL;
590
591 memset(flags_string, 0, 12);
592
593 if (copy_from_user(flags_string, buffer, count))
594 return -EFAULT;
595
596 if (count < 3) {
597 /* single char or single char followed by null */
598 c = flags_string[0];
599 if (c == '0' || c == 'n' || c == 'N') {
600 global_secflags = CIFSSEC_DEF; /* default */
601 return count;
602 } else if (c == '1' || c == 'y' || c == 'Y') {
603 global_secflags = CIFSSEC_MAX;
604 return count;
605 } else if (!isdigit(c)) {
606 cERROR(1, "invalid flag %c", c);
607 return -EINVAL;
608 }
609 }
610 /* else we have a number */
611
612 flags = simple_strtoul(flags_string, NULL, 0);
613
614 cFYI(1, "sec flags 0x%x", flags);
615
616 if (flags <= 0) {
617 cERROR(1, "invalid security flags %s", flags_string);
618 return -EINVAL;
619 }
620
621 if (flags & ~CIFSSEC_MASK) {
622 cERROR(1, "attempt to set unsupported security flags 0x%x",
623 flags & ~CIFSSEC_MASK);
624 return -EINVAL;
625 }
626 /* flags look ok - update the global security flags for cifs module */
627 global_secflags = flags;
628 if (global_secflags & CIFSSEC_MUST_SIGN) {
629 /* requiring signing implies signing is allowed */
630 global_secflags |= CIFSSEC_MAY_SIGN;
631 cFYI(1, "packet signing now required");
632 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
633 cFYI(1, "packet signing disabled");
634 }
635 /* BB should we turn on MAY flags for other MUST options? */
636 return count;
637 }
638
639 static const struct file_operations cifs_security_flags_proc_fops = {
640 .owner = THIS_MODULE,
641 .open = cifs_security_flags_proc_open,
642 .read = seq_read,
643 .llseek = seq_lseek,
644 .release = single_release,
645 .write = cifs_security_flags_proc_write,
646 };
647 #else
648 inline void cifs_proc_init(void)
649 {
650 }
651
652 inline void cifs_proc_clean(void)
653 {
654 }
655 #endif /* PROC_FS */
CRIS linux kernel tree