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