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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
34void
35cifs_dump_mem(char *label, void *data, int length)
36{
37 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
38 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
39 data, length, true);
40}
41
42#ifdef CONFIG_CIFS_DEBUG
43void cifs_vfs_err(const char *fmt, ...)
44{
45 struct va_format vaf;
46 va_list args;
47
48 va_start(args, fmt);
49
50 vaf.fmt = fmt;
51 vaf.va = &args;
52
53 pr_err_ratelimited("CIFS VFS: %pV", &vaf);
54
55 va_end(args);
56}
57#endif
58
59void cifs_dump_detail(void *buf)
60{
61#ifdef CONFIG_CIFS_DEBUG2
62 struct smb_hdr *smb = (struct smb_hdr *)buf;
63
64 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
65 smb->Command, smb->Status.CifsError,
66 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
67 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smbCalcSize(smb));
68#endif /* CONFIG_CIFS_DEBUG2 */
69}
70
71void cifs_dump_mids(struct TCP_Server_Info *server)
72{
73#ifdef CONFIG_CIFS_DEBUG2
74 struct list_head *tmp;
75 struct mid_q_entry *mid_entry;
76
77 if (server == NULL)
78 return;
79
80 cifs_dbg(VFS, "Dump pending requests:\n");
81 spin_lock(&GlobalMid_Lock);
82 list_for_each(tmp, &server->pending_mid_q) {
83 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
84 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
85 mid_entry->mid_state,
86 le16_to_cpu(mid_entry->command),
87 mid_entry->pid,
88 mid_entry->callback_data,
89 mid_entry->mid);
90#ifdef CONFIG_CIFS_STATS2
91 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
92 mid_entry->large_buf,
93 mid_entry->resp_buf,
94 mid_entry->when_received,
95 jiffies);
96#endif /* STATS2 */
97 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
98 mid_entry->multiRsp, mid_entry->multiEnd);
99 if (mid_entry->resp_buf) {
100 cifs_dump_detail(mid_entry->resp_buf);
101 cifs_dump_mem("existing buf: ",
102 mid_entry->resp_buf, 62);
103 }
104 }
105 spin_unlock(&GlobalMid_Lock);
106#endif /* CONFIG_CIFS_DEBUG2 */
107}
108
109#ifdef CONFIG_PROC_FS
110static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
111{
112 struct list_head *tmp1, *tmp2, *tmp3;
113 struct mid_q_entry *mid_entry;
114 struct TCP_Server_Info *server;
115 struct cifs_ses *ses;
116 struct cifs_tcon *tcon;
117 int i, j;
118 __u32 dev_type;
119
120 seq_puts(m,
121 "Display Internal CIFS Data Structures for Debugging\n"
122 "---------------------------------------------------\n");
123 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
124 seq_printf(m, "Features:");
125#ifdef CONFIG_CIFS_DFS_UPCALL
126 seq_printf(m, " dfs");
127#endif
128#ifdef CONFIG_CIFS_FSCACHE
129 seq_printf(m, " fscache");
130#endif
131#ifdef CONFIG_CIFS_WEAK_PW_HASH
132 seq_printf(m, " lanman");
133#endif
134#ifdef CONFIG_CIFS_POSIX
135 seq_printf(m, " posix");
136#endif
137#ifdef CONFIG_CIFS_UPCALL
138 seq_printf(m, " spnego");
139#endif
140#ifdef CONFIG_CIFS_XATTR
141 seq_printf(m, " xattr");
142#endif
143#ifdef CONFIG_CIFS_ACL
144 seq_printf(m, " acl");
145#endif
146 seq_putc(m, '\n');
147 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
148 seq_printf(m, "Servers:");
149
150 i = 0;
151 spin_lock(&cifs_tcp_ses_lock);
152 list_for_each(tmp1, &cifs_tcp_ses_list) {
153 server = list_entry(tmp1, struct TCP_Server_Info,
154 tcp_ses_list);
155 i++;
156 list_for_each(tmp2, &server->smb_ses_list) {
157 ses = list_entry(tmp2, struct cifs_ses,
158 smb_ses_list);
159 if ((ses->serverDomain == NULL) ||
160 (ses->serverOS == NULL) ||
161 (ses->serverNOS == NULL)) {
162 seq_printf(m, "\n%d) entry for %s not fully "
163 "displayed\n\t", i, ses->serverName);
164 } else {
165 seq_printf(m,
166 "\n%d) Name: %s Domain: %s Uses: %d OS:"
167 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
168 " session status: %d\t",
169 i, ses->serverName, ses->serverDomain,
170 ses->ses_count, ses->serverOS, ses->serverNOS,
171 ses->capabilities, ses->status);
172 }
173 seq_printf(m, "TCP status: %d\n\tLocal Users To "
174 "Server: %d SecMode: 0x%x Req On Wire: %d",
175 server->tcpStatus, server->srv_count,
176 server->sec_mode, in_flight(server));
177
178#ifdef CONFIG_CIFS_STATS2
179 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
180 atomic_read(&server->in_send),
181 atomic_read(&server->num_waiters));
182#endif
183
184 seq_puts(m, "\n\tShares:");
185 j = 0;
186 list_for_each(tmp3, &ses->tcon_list) {
187 tcon = list_entry(tmp3, struct cifs_tcon,
188 tcon_list);
189 ++j;
190 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
191 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
192 tcon->treeName, tcon->tc_count);
193 if (tcon->nativeFileSystem) {
194 seq_printf(m, "Type: %s ",
195 tcon->nativeFileSystem);
196 }
197 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
198 "\n\tPathComponentMax: %d Status: %d",
199 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
200 le32_to_cpu(tcon->fsAttrInfo.Attributes),
201 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
202 tcon->tidStatus);
203 if (dev_type == FILE_DEVICE_DISK)
204 seq_puts(m, " type: DISK ");
205 else if (dev_type == FILE_DEVICE_CD_ROM)
206 seq_puts(m, " type: CDROM ");
207 else
208 seq_printf(m, " type: %d ", dev_type);
209 if (server->ops->dump_share_caps)
210 server->ops->dump_share_caps(m, tcon);
211
212 if (tcon->need_reconnect)
213 seq_puts(m, "\tDISCONNECTED ");
214 seq_putc(m, '\n');
215 }
216
217 seq_puts(m, "\n\tMIDs:\n");
218
219 spin_lock(&GlobalMid_Lock);
220 list_for_each(tmp3, &server->pending_mid_q) {
221 mid_entry = list_entry(tmp3, struct mid_q_entry,
222 qhead);
223 seq_printf(m, "\tState: %d com: %d pid:"
224 " %d cbdata: %p mid %llu\n",
225 mid_entry->mid_state,
226 le16_to_cpu(mid_entry->command),
227 mid_entry->pid,
228 mid_entry->callback_data,
229 mid_entry->mid);
230 }
231 spin_unlock(&GlobalMid_Lock);
232 }
233 }
234 spin_unlock(&cifs_tcp_ses_lock);
235 seq_putc(m, '\n');
236
237 /* BB add code to dump additional info such as TCP session info now */
238 return 0;
239}
240
241static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
242{
243 return single_open(file, cifs_debug_data_proc_show, NULL);
244}
245
246static const struct file_operations cifs_debug_data_proc_fops = {
247 .owner = THIS_MODULE,
248 .open = cifs_debug_data_proc_open,
249 .read = seq_read,
250 .llseek = seq_lseek,
251 .release = single_release,
252};
253
254#ifdef CONFIG_CIFS_STATS
255static ssize_t cifs_stats_proc_write(struct file *file,
256 const char __user *buffer, size_t count, loff_t *ppos)
257{
258 bool bv;
259 int rc;
260 struct list_head *tmp1, *tmp2, *tmp3;
261 struct TCP_Server_Info *server;
262 struct cifs_ses *ses;
263 struct cifs_tcon *tcon;
264
265 rc = kstrtobool_from_user(buffer, count, &bv);
266 if (rc == 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 if (server->ops->clear_stats)
284 server->ops->clear_stats(tcon);
285 }
286 }
287 }
288 spin_unlock(&cifs_tcp_ses_lock);
289 } else {
290 return rc;
291 }
292
293 return count;
294}
295
296static 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
358static int cifs_stats_proc_open(struct inode *inode, struct file *file)
359{
360 return single_open(file, cifs_stats_proc_show, NULL);
361}
362
363static 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
373static struct proc_dir_entry *proc_fs_cifs;
374static const struct file_operations cifsFYI_proc_fops;
375static const struct file_operations cifs_lookup_cache_proc_fops;
376static const struct file_operations traceSMB_proc_fops;
377static const struct file_operations cifs_security_flags_proc_fops;
378static const struct file_operations cifs_linux_ext_proc_fops;
379
380void
381cifs_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
402void
403cifs_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
420static int cifsFYI_proc_show(struct seq_file *m, void *v)
421{
422 seq_printf(m, "%d\n", cifsFYI);
423 return 0;
424}
425
426static int cifsFYI_proc_open(struct inode *inode, struct file *file)
427{
428 return single_open(file, cifsFYI_proc_show, NULL);
429}
430
431static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
432 size_t count, loff_t *ppos)
433{
434 char c[2] = { '\0' };
435 bool bv;
436 int rc;
437
438 rc = get_user(c[0], buffer);
439 if (rc)
440 return rc;
441 if (strtobool(c, &bv) == 0)
442 cifsFYI = bv;
443 else if ((c[0] > '1') && (c[0] <= '9'))
444 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
445
446 return count;
447}
448
449static const struct file_operations cifsFYI_proc_fops = {
450 .owner = THIS_MODULE,
451 .open = cifsFYI_proc_open,
452 .read = seq_read,
453 .llseek = seq_lseek,
454 .release = single_release,
455 .write = cifsFYI_proc_write,
456};
457
458static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
459{
460 seq_printf(m, "%d\n", linuxExtEnabled);
461 return 0;
462}
463
464static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
465{
466 return single_open(file, cifs_linux_ext_proc_show, NULL);
467}
468
469static ssize_t cifs_linux_ext_proc_write(struct file *file,
470 const char __user *buffer, size_t count, loff_t *ppos)
471{
472 int rc;
473
474 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
475 if (rc)
476 return rc;
477
478 return count;
479}
480
481static const struct file_operations cifs_linux_ext_proc_fops = {
482 .owner = THIS_MODULE,
483 .open = cifs_linux_ext_proc_open,
484 .read = seq_read,
485 .llseek = seq_lseek,
486 .release = single_release,
487 .write = cifs_linux_ext_proc_write,
488};
489
490static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
491{
492 seq_printf(m, "%d\n", lookupCacheEnabled);
493 return 0;
494}
495
496static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
497{
498 return single_open(file, cifs_lookup_cache_proc_show, NULL);
499}
500
501static ssize_t cifs_lookup_cache_proc_write(struct file *file,
502 const char __user *buffer, size_t count, loff_t *ppos)
503{
504 int rc;
505
506 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
507 if (rc)
508 return rc;
509
510 return count;
511}
512
513static const struct file_operations cifs_lookup_cache_proc_fops = {
514 .owner = THIS_MODULE,
515 .open = cifs_lookup_cache_proc_open,
516 .read = seq_read,
517 .llseek = seq_lseek,
518 .release = single_release,
519 .write = cifs_lookup_cache_proc_write,
520};
521
522static int traceSMB_proc_show(struct seq_file *m, void *v)
523{
524 seq_printf(m, "%d\n", traceSMB);
525 return 0;
526}
527
528static int traceSMB_proc_open(struct inode *inode, struct file *file)
529{
530 return single_open(file, traceSMB_proc_show, NULL);
531}
532
533static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
534 size_t count, loff_t *ppos)
535{
536 int rc;
537
538 rc = kstrtobool_from_user(buffer, count, &traceSMB);
539 if (rc)
540 return rc;
541
542 return count;
543}
544
545static const struct file_operations traceSMB_proc_fops = {
546 .owner = THIS_MODULE,
547 .open = traceSMB_proc_open,
548 .read = seq_read,
549 .llseek = seq_lseek,
550 .release = single_release,
551 .write = traceSMB_proc_write,
552};
553
554static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
555{
556 seq_printf(m, "0x%x\n", global_secflags);
557 return 0;
558}
559
560static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
561{
562 return single_open(file, cifs_security_flags_proc_show, NULL);
563}
564
565/*
566 * Ensure that if someone sets a MUST flag, that we disable all other MAY
567 * flags except for the ones corresponding to the given MUST flag. If there are
568 * multiple MUST flags, then try to prefer more secure ones.
569 */
570static void
571cifs_security_flags_handle_must_flags(unsigned int *flags)
572{
573 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
574
575 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
576 *flags = CIFSSEC_MUST_KRB5;
577 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
578 *flags = CIFSSEC_MUST_NTLMSSP;
579 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
580 *flags = CIFSSEC_MUST_NTLMV2;
581 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
582 *flags = CIFSSEC_MUST_NTLM;
583 else if (CIFSSEC_MUST_LANMAN &&
584 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
585 *flags = CIFSSEC_MUST_LANMAN;
586 else if (CIFSSEC_MUST_PLNTXT &&
587 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
588 *flags = CIFSSEC_MUST_PLNTXT;
589
590 *flags |= signflags;
591}
592
593static ssize_t cifs_security_flags_proc_write(struct file *file,
594 const char __user *buffer, size_t count, loff_t *ppos)
595{
596 int rc;
597 unsigned int flags;
598 char flags_string[12];
599 bool bv;
600
601 if ((count < 1) || (count > 11))
602 return -EINVAL;
603
604 memset(flags_string, 0, 12);
605
606 if (copy_from_user(flags_string, buffer, count))
607 return -EFAULT;
608
609 if (count < 3) {
610 /* single char or single char followed by null */
611 if (strtobool(flags_string, &bv) == 0) {
612 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
613 return count;
614 } else if (!isdigit(flags_string[0])) {
615 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
616 flags_string);
617 return -EINVAL;
618 }
619 }
620
621 /* else we have a number */
622 rc = kstrtouint(flags_string, 0, &flags);
623 if (rc) {
624 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
625 flags_string);
626 return rc;
627 }
628
629 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
630
631 if (flags == 0) {
632 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
633 return -EINVAL;
634 }
635
636 if (flags & ~CIFSSEC_MASK) {
637 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
638 flags & ~CIFSSEC_MASK);
639 return -EINVAL;
640 }
641
642 cifs_security_flags_handle_must_flags(&flags);
643
644 /* flags look ok - update the global security flags for cifs module */
645 global_secflags = flags;
646 if (global_secflags & CIFSSEC_MUST_SIGN) {
647 /* requiring signing implies signing is allowed */
648 global_secflags |= CIFSSEC_MAY_SIGN;
649 cifs_dbg(FYI, "packet signing now required\n");
650 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
651 cifs_dbg(FYI, "packet signing disabled\n");
652 }
653 /* BB should we turn on MAY flags for other MUST options? */
654 return count;
655}
656
657static const struct file_operations cifs_security_flags_proc_fops = {
658 .owner = THIS_MODULE,
659 .open = cifs_security_flags_proc_open,
660 .read = seq_read,
661 .llseek = seq_lseek,
662 .release = single_release,
663 .write = cifs_security_flags_proc_write,
664};
665#else
666inline void cifs_proc_init(void)
667{
668}
669
670inline void cifs_proc_clean(void)
671{
672}
673#endif /* PROC_FS */
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
34void
35cifs_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
60void 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
72void 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
111static 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
240static 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
245static 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
254static 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
312static 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
406static int cifs_stats_proc_open(struct inode *inode, struct file *file)
407{
408 return single_open(file, cifs_stats_proc_show, NULL);
409}
410
411static 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
421static struct proc_dir_entry *proc_fs_cifs;
422static const struct file_operations cifsFYI_proc_fops;
423static const struct file_operations cifs_lookup_cache_proc_fops;
424static const struct file_operations traceSMB_proc_fops;
425static const struct file_operations cifs_security_flags_proc_fops;
426static const struct file_operations cifs_linux_ext_proc_fops;
427
428void
429cifs_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
450void
451cifs_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
468static int cifsFYI_proc_show(struct seq_file *m, void *v)
469{
470 seq_printf(m, "%d\n", cifsFYI);
471 return 0;
472}
473
474static int cifsFYI_proc_open(struct inode *inode, struct file *file)
475{
476 return single_open(file, cifsFYI_proc_show, NULL);
477}
478
479static 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
498static 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
507static 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
513static 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
518static 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
535static 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
544static 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
550static 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
555static 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
572static 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
581static int traceSMB_proc_show(struct seq_file *m, void *v)
582{
583 seq_printf(m, "%d\n", traceSMB);
584 return 0;
585}
586
587static int traceSMB_proc_open(struct inode *inode, struct file *file)
588{
589 return single_open(file, traceSMB_proc_show, NULL);
590}
591
592static 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
609static 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
618static 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
624static 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
629static 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
687static 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
696inline void cifs_proc_init(void)
697{
698}
699
700inline void cifs_proc_clean(void)
701{
702}
703#endif /* PROC_FS */