1 /*
2 * fs/cifs_debug.c
3 *
4 * Copyright (C) International Business Machines Corp., 2000,2005
5 *
6 * Modified by Steve French (sfrench@us.ibm.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22 #include <linux/fs.h>
23 #include <linux/string.h>
24 #include <linux/ctype.h>
25 #include <linux/module.h>
26 #include <linux/proc_fs.h>
27 #include <asm/uaccess.h>
28 #include "cifspdu.h"
29 #include "cifsglob.h"
30 #include "cifsproto.h"
31 #include "cifs_debug.h"
32 #include "cifsfs.h"
33
34 void
35 cifs_dump_mem(char *label, void *data, int length)
36 {
37 int i, j;
38 int *intptr = data;
39 char *charptr = data;
40 char buf[10], line[80];
41
42 printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n",
43 label, length, data);
44 for (i = 0; i < length; i += 16) {
45 line[0] = 0;
46 for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
47 sprintf(buf, " %08x", intptr[i / 4 + j]);
48 strcat(line, buf);
49 }
50 buf[0] = ' ';
51 buf[2] = 0;
52 for (j = 0; (j < 16) && (i + j < length); j++) {
53 buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
54 strcat(line, buf);
55 }
56 printk(KERN_DEBUG "%s\n", line);
57 }
58 }
59
60 #ifdef CONFIG_CIFS_DEBUG2
61 void cifs_dump_detail(struct smb_hdr *smb)
62 {
63 cERROR(1, ("Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",
64 smb->Command, smb->Status.CifsError,
65 smb->Flags, smb->Flags2, smb->Mid, smb->Pid));
66 cERROR(1, ("smb buf %p len %d", smb, smbCalcSize_LE(smb)));
67 }
68
69
70 void cifs_dump_mids(struct TCP_Server_Info *server)
71 {
72 struct list_head *tmp;
73 struct mid_q_entry *mid_entry;
74
75 if (server == NULL)
76 return;
77
78 cERROR(1, ("Dump pending requests:"));
79 spin_lock(&GlobalMid_Lock);
80 list_for_each(tmp, &server->pending_mid_q) {
81 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
82 if (mid_entry) {
83 cERROR(1, ("State: %d Cmd: %d Pid: %d Tsk: %p Mid %d",
84 mid_entry->midState,
85 (int)mid_entry->command,
86 mid_entry->pid,
87 mid_entry->tsk,
88 mid_entry->mid));
89 #ifdef CONFIG_CIFS_STATS2
90 cERROR(1, ("IsLarge: %d buf: %p time rcv: %ld now: %ld",
91 mid_entry->largeBuf,
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 }
105 spin_unlock(&GlobalMid_Lock);
106 }
107 #endif /* CONFIG_CIFS_DEBUG2 */
108
109 #ifdef CONFIG_PROC_FS
110 static int
111 cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
112 int count, int *eof, void *data)
113 {
114 struct list_head *tmp;
115 struct list_head *tmp1;
116 struct mid_q_entry *mid_entry;
117 struct cifsSesInfo *ses;
118 struct cifsTconInfo *tcon;
119 int i;
120 int length = 0;
121 char *original_buf = buf;
122
123 *beginBuffer = buf + offset;
124
125 length =
126 sprintf(buf,
127 "Display Internal CIFS Data Structures for Debugging\n"
128 "---------------------------------------------------\n");
129 buf += length;
130 length = sprintf(buf, "CIFS Version %s\n", CIFS_VERSION);
131 buf += length;
132 length = sprintf(buf,
133 "Active VFS Requests: %d\n", GlobalTotalActiveXid);
134 buf += length;
135 length = sprintf(buf, "Servers:");
136 buf += length;
137
138 i = 0;
139 read_lock(&GlobalSMBSeslock);
140 list_for_each(tmp, &GlobalSMBSessionList) {
141 i++;
142 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
143 if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
144 (ses->serverNOS == NULL)) {
145 buf += sprintf(buf, "\nentry for %s not fully "
146 "displayed\n\t", ses->serverName);
147 } else {
148 length =
149 sprintf(buf,
150 "\n%d) Name: %s Domain: %s Mounts: %d OS:"
151 " %s \n\tNOS: %s\tCapability: 0x%x\n\tSMB"
152 " session status: %d\t",
153 i, ses->serverName, ses->serverDomain,
154 atomic_read(&ses->inUse),
155 ses->serverOS, ses->serverNOS,
156 ses->capabilities, ses->status);
157 buf += length;
158 }
159 if (ses->server) {
160 buf += sprintf(buf, "TCP status: %d\n\tLocal Users To "
161 "Server: %d SecMode: 0x%x Req On Wire: %d",
162 ses->server->tcpStatus,
163 atomic_read(&ses->server->socketUseCount),
164 ses->server->secMode,
165 atomic_read(&ses->server->inFlight));
166
167 #ifdef CONFIG_CIFS_STATS2
168 buf += sprintf(buf, " In Send: %d In MaxReq Wait: %d",
169 atomic_read(&ses->server->inSend),
170 atomic_read(&ses->server->num_waiters));
171 #endif
172
173 length = sprintf(buf, "\nMIDs:\n");
174 buf += length;
175
176 spin_lock(&GlobalMid_Lock);
177 list_for_each(tmp1, &ses->server->pending_mid_q) {
178 mid_entry = list_entry(tmp1, struct
179 mid_q_entry,
180 qhead);
181 if (mid_entry) {
182 length = sprintf(buf,
183 "State: %d com: %d pid:"
184 " %d tsk: %p mid %d\n",
185 mid_entry->midState,
186 (int)mid_entry->command,
187 mid_entry->pid,
188 mid_entry->tsk,
189 mid_entry->mid);
190 buf += length;
191 }
192 }
193 spin_unlock(&GlobalMid_Lock);
194 }
195
196 }
197 read_unlock(&GlobalSMBSeslock);
198 sprintf(buf, "\n");
199 buf++;
200
201 length = sprintf(buf, "Shares:");
202 buf += length;
203
204 i = 0;
205 read_lock(&GlobalSMBSeslock);
206 list_for_each(tmp, &GlobalTreeConnectionList) {
207 __u32 dev_type;
208 i++;
209 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
210 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
211 length = sprintf(buf, "\n%d) %s Uses: %d ", i,
212 tcon->treeName, atomic_read(&tcon->useCount));
213 buf += length;
214 if (tcon->nativeFileSystem) {
215 length = sprintf(buf, "Type: %s ",
216 tcon->nativeFileSystem);
217 buf += length;
218 }
219 length = sprintf(buf, "DevInfo: 0x%x Attributes: 0x%x"
220 "\nPathComponentMax: %d Status: %d",
221 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
222 le32_to_cpu(tcon->fsAttrInfo.Attributes),
223 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
224 tcon->tidStatus);
225 buf += length;
226 if (dev_type == FILE_DEVICE_DISK)
227 length = sprintf(buf, " type: DISK ");
228 else if (dev_type == FILE_DEVICE_CD_ROM)
229 length = sprintf(buf, " type: CDROM ");
230 else
231 length =
232 sprintf(buf, " type: %d ", dev_type);
233 buf += length;
234 if (tcon->tidStatus == CifsNeedReconnect) {
235 buf += sprintf(buf, "\tDISCONNECTED ");
236 length += 14;
237 }
238 }
239 read_unlock(&GlobalSMBSeslock);
240
241 length = sprintf(buf, "\n");
242 buf += length;
243
244 /* BB add code to dump additional info such as TCP session info now */
245 /* Now calculate total size of returned data */
246 length = buf - original_buf;
247
248 if (offset + count >= length)
249 *eof = 1;
250 if (length < offset) {
251 *eof = 1;
252 return 0;
253 } else {
254 length = length - offset;
255 }
256 if (length > count)
257 length = count;
258
259 return length;
260 }
261
262 #ifdef CONFIG_CIFS_STATS
263
264 static int
265 cifs_stats_write(struct file *file, const char __user *buffer,
266 unsigned long count, void *data)
267 {
268 char c;
269 int rc;
270 struct list_head *tmp;
271 struct cifsTconInfo *tcon;
272
273 rc = get_user(c, buffer);
274 if (rc)
275 return rc;
276
277 if (c == '1' || c == 'y' || c == 'Y' || c == '') {
278 read_lock(&GlobalSMBSeslock);
279 #ifdef CONFIG_CIFS_STATS2
280 atomic_set(&totBufAllocCount, 0);
281 atomic_set(&totSmBufAllocCount, 0);
282 #endif /* CONFIG_CIFS_STATS2 */
283 list_for_each(tmp, &GlobalTreeConnectionList) {
284 tcon = list_entry(tmp, struct cifsTconInfo,
285 cifsConnectionList);
286 atomic_set(&tcon->num_smbs_sent, 0);
287 atomic_set(&tcon->num_writes, 0);
288 atomic_set(&tcon->num_reads, 0);
289 atomic_set(&tcon->num_oplock_brks, 0);
290 atomic_set(&tcon->num_opens, 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 read_unlock(&GlobalSMBSeslock);
305 }
306
307 return count;
308 }
309
310 static int
311 cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
312 int count, int *eof, void *data)
313 {
314 int item_length, i, length;
315 struct list_head *tmp;
316 struct cifsTconInfo *tcon;
317
318 *beginBuffer = buf + offset;
319
320 length = sprintf(buf,
321 "Resources in use\nCIFS Session: %d\n",
322 sesInfoAllocCount.counter);
323 buf += length;
324 item_length =
325 sprintf(buf, "Share (unique mount targets): %d\n",
326 tconInfoAllocCount.counter);
327 length += item_length;
328 buf += item_length;
329 item_length =
330 sprintf(buf, "SMB Request/Response Buffer: %d Pool size: %d\n",
331 bufAllocCount.counter,
332 cifs_min_rcv + tcpSesAllocCount.counter);
333 length += item_length;
334 buf += item_length;
335 item_length =
336 sprintf(buf, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
337 smBufAllocCount.counter, cifs_min_small);
338 length += item_length;
339 buf += item_length;
340 #ifdef CONFIG_CIFS_STATS2
341 item_length = sprintf(buf, "Total Large %d Small %d Allocations\n",
342 atomic_read(&totBufAllocCount),
343 atomic_read(&totSmBufAllocCount));
344 length += item_length;
345 buf += item_length;
346 #endif /* CONFIG_CIFS_STATS2 */
347
348 item_length =
349 sprintf(buf, "Operations (MIDs): %d\n",
350 midCount.counter);
351 length += item_length;
352 buf += item_length;
353 item_length = sprintf(buf,
354 "\n%d session %d share reconnects\n",
355 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
356 length += item_length;
357 buf += item_length;
358
359 item_length = sprintf(buf,
360 "Total vfs operations: %d maximum at one time: %d\n",
361 GlobalCurrentXid, GlobalMaxActiveXid);
362 length += item_length;
363 buf += item_length;
364
365 i = 0;
366 read_lock(&GlobalSMBSeslock);
367 list_for_each(tmp, &GlobalTreeConnectionList) {
368 i++;
369 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
370 item_length = sprintf(buf, "\n%d) %s", i, tcon->treeName);
371 buf += item_length;
372 length += item_length;
373 if (tcon->tidStatus == CifsNeedReconnect) {
374 buf += sprintf(buf, "\tDISCONNECTED ");
375 length += 14;
376 }
377 item_length = sprintf(buf, "\nSMBs: %d Oplock Breaks: %d",
378 atomic_read(&tcon->num_smbs_sent),
379 atomic_read(&tcon->num_oplock_brks));
380 buf += item_length;
381 length += item_length;
382 item_length = sprintf(buf, "\nReads: %d Bytes: %lld",
383 atomic_read(&tcon->num_reads),
384 (long long)(tcon->bytes_read));
385 buf += item_length;
386 length += item_length;
387 item_length = sprintf(buf, "\nWrites: %d Bytes: %lld",
388 atomic_read(&tcon->num_writes),
389 (long long)(tcon->bytes_written));
390 buf += item_length;
391 length += item_length;
392 item_length = sprintf(buf,
393 "\nLocks: %d HardLinks: %d Symlinks: %d",
394 atomic_read(&tcon->num_locks),
395 atomic_read(&tcon->num_hardlinks),
396 atomic_read(&tcon->num_symlinks));
397 buf += item_length;
398 length += item_length;
399
400 item_length = sprintf(buf, "\nOpens: %d Closes: %d Deletes: %d",
401 atomic_read(&tcon->num_opens),
402 atomic_read(&tcon->num_closes),
403 atomic_read(&tcon->num_deletes));
404 buf += item_length;
405 length += item_length;
406 item_length = sprintf(buf, "\nMkdirs: %d Rmdirs: %d",
407 atomic_read(&tcon->num_mkdirs),
408 atomic_read(&tcon->num_rmdirs));
409 buf += item_length;
410 length += item_length;
411 item_length = sprintf(buf, "\nRenames: %d T2 Renames %d",
412 atomic_read(&tcon->num_renames),
413 atomic_read(&tcon->num_t2renames));
414 buf += item_length;
415 length += item_length;
416 item_length = sprintf(buf, "\nFindFirst: %d FNext %d FClose %d",
417 atomic_read(&tcon->num_ffirst),
418 atomic_read(&tcon->num_fnext),
419 atomic_read(&tcon->num_fclose));
420 buf += item_length;
421 length += item_length;
422 }
423 read_unlock(&GlobalSMBSeslock);
424
425 buf += sprintf(buf, "\n");
426 length++;
427
428 if (offset + count >= length)
429 *eof = 1;
430 if (length < offset) {
431 *eof = 1;
432 return 0;
433 } else {
434 length = length - offset;
435 }
436 if (length > count)
437 length = count;
438
439 return length;
440 }
441 #endif /* STATS */
442
443 static struct proc_dir_entry *proc_fs_cifs;
444 read_proc_t cifs_txanchor_read;
445 static read_proc_t cifsFYI_read;
446 static write_proc_t cifsFYI_write;
447 static read_proc_t oplockEnabled_read;
448 static write_proc_t oplockEnabled_write;
449 static read_proc_t lookupFlag_read;
450 static write_proc_t lookupFlag_write;
451 static read_proc_t traceSMB_read;
452 static write_proc_t traceSMB_write;
453 static read_proc_t multiuser_mount_read;
454 static write_proc_t multiuser_mount_write;
455 static read_proc_t security_flags_read;
456 static write_proc_t security_flags_write;
457 /* static read_proc_t ntlmv2_enabled_read;
458 static write_proc_t ntlmv2_enabled_write;
459 static read_proc_t packet_signing_enabled_read;
460 static write_proc_t packet_signing_enabled_write;*/
461 static read_proc_t experimEnabled_read;
462 static write_proc_t experimEnabled_write;
463 static read_proc_t linuxExtensionsEnabled_read;
464 static write_proc_t linuxExtensionsEnabled_write;
465
466 void
467 cifs_proc_init(void)
468 {
469 struct proc_dir_entry *pde;
470
471 proc_fs_cifs = proc_mkdir("cifs", proc_root_fs);
472 if (proc_fs_cifs == NULL)
473 return;
474
475 proc_fs_cifs->owner = THIS_MODULE;
476 create_proc_read_entry("DebugData", 0, proc_fs_cifs,
477 cifs_debug_data_read, NULL);
478
479 #ifdef CONFIG_CIFS_STATS
480 pde = create_proc_read_entry("Stats", 0, proc_fs_cifs,
481 cifs_stats_read, NULL);
482 if (pde)
483 pde->write_proc = cifs_stats_write;
484 #endif /* STATS */
485 pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
486 cifsFYI_read, NULL);
487 if (pde)
488 pde->write_proc = cifsFYI_write;
489
490 pde =
491 create_proc_read_entry("traceSMB", 0, proc_fs_cifs,
492 traceSMB_read, NULL);
493 if (pde)
494 pde->write_proc = traceSMB_write;
495
496 pde = create_proc_read_entry("OplockEnabled", 0, proc_fs_cifs,
497 oplockEnabled_read, NULL);
498 if (pde)
499 pde->write_proc = oplockEnabled_write;
500
501 pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
502 experimEnabled_read, NULL);
503 if (pde)
504 pde->write_proc = experimEnabled_write;
505
506 pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
507 linuxExtensionsEnabled_read, NULL);
508 if (pde)
509 pde->write_proc = linuxExtensionsEnabled_write;
510
511 pde =
512 create_proc_read_entry("MultiuserMount", 0, proc_fs_cifs,
513 multiuser_mount_read, NULL);
514 if (pde)
515 pde->write_proc = multiuser_mount_write;
516
517 pde =
518 create_proc_read_entry("SecurityFlags", 0, proc_fs_cifs,
519 security_flags_read, NULL);
520 if (pde)
521 pde->write_proc = security_flags_write;
522
523 pde =
524 create_proc_read_entry("LookupCacheEnabled", 0, proc_fs_cifs,
525 lookupFlag_read, NULL);
526 if (pde)
527 pde->write_proc = lookupFlag_write;
528
529 /* pde =
530 create_proc_read_entry("NTLMV2Enabled", 0, proc_fs_cifs,
531 ntlmv2_enabled_read, NULL);
532 if (pde)
533 pde->write_proc = ntlmv2_enabled_write;
534
535 pde =
536 create_proc_read_entry("PacketSigningEnabled", 0, proc_fs_cifs,
537 packet_signing_enabled_read, NULL);
538 if (pde)
539 pde->write_proc = packet_signing_enabled_write;*/
540 }
541
542 void
543 cifs_proc_clean(void)
544 {
545 if (proc_fs_cifs == NULL)
546 return;
547
548 remove_proc_entry("DebugData", proc_fs_cifs);
549 remove_proc_entry("cifsFYI", proc_fs_cifs);
550 remove_proc_entry("traceSMB", proc_fs_cifs);
551 #ifdef CONFIG_CIFS_STATS
552 remove_proc_entry("Stats", proc_fs_cifs);
553 #endif
554 remove_proc_entry("MultiuserMount", proc_fs_cifs);
555 remove_proc_entry("OplockEnabled", proc_fs_cifs);
556 /* remove_proc_entry("NTLMV2Enabled",proc_fs_cifs); */
557 remove_proc_entry("SecurityFlags", proc_fs_cifs);
558 /* remove_proc_entry("PacketSigningEnabled", proc_fs_cifs); */
559 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
560 remove_proc_entry("Experimental", proc_fs_cifs);
561 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
562 remove_proc_entry("cifs", proc_root_fs);
563 }
564
565 static int
566 cifsFYI_read(char *page, char **start, off_t off, int count,
567 int *eof, void *data)
568 {
569 int len;
570
571 len = sprintf(page, "%d\n", cifsFYI);
572
573 len -= off;
574 *start = page + off;
575
576 if (len > count)
577 len = count;
578 else
579 *eof = 1;
580
581 if (len < 0)
582 len = 0;
583
584 return len;
585 }
586 static int
587 cifsFYI_write(struct file *file, const char __user *buffer,
588 unsigned long count, void *data)
589 {
590 char c;
591 int rc;
592
593 rc = get_user(c, buffer);
594 if (rc)
595 return rc;
596 if (c == '' || c == 'n' || c == 'N')
597 cifsFYI = 0;
598 else if (c == '1' || c == 'y' || c == 'Y')
599 cifsFYI = 1;
600 else if ((c > '1') && (c <= '9'))
601 cifsFYI = (int) (c - ''); /* see cifs_debug.h for meanings */
602
603 return count;
604 }
605
606 static int
607 oplockEnabled_read(char *page, char **start, off_t off,
608 int count, int *eof, void *data)
609 {
610 int len;
611
612 len = sprintf(page, "%d\n", oplockEnabled);
613
614 len -= off;
615 *start = page + off;
616
617 if (len > count)
618 len = count;
619 else
620 *eof = 1;
621
622 if (len < 0)
623 len = 0;
624
625 return len;
626 }
627 static int
628 oplockEnabled_write(struct file *file, const char __user *buffer,
629 unsigned long count, void *data)
630 {
631 char c;
632 int rc;
633
634 rc = get_user(c, buffer);
635 if (rc)
636 return rc;
637 if (c == '' || c == 'n' || c == 'N')
638 oplockEnabled = 0;
639 else if (c == '1' || c == 'y' || c == 'Y')
640 oplockEnabled = 1;
641
642 return count;
643 }
644
645 static int
646 experimEnabled_read(char *page, char **start, off_t off,
647 int count, int *eof, void *data)
648 {
649 int len;
650
651 len = sprintf(page, "%d\n", experimEnabled);
652
653 len -= off;
654 *start = page + off;
655
656 if (len > count)
657 len = count;
658 else
659 *eof = 1;
660
661 if (len < 0)
662 len = 0;
663
664 return len;
665 }
666 static int
667 experimEnabled_write(struct file *file, const char __user *buffer,
668 unsigned long count, void *data)
669 {
670 char c;
671 int rc;
672
673 rc = get_user(c, buffer);
674 if (rc)
675 return rc;
676 if (c == '' || c == 'n' || c == 'N')
677 experimEnabled = 0;
678 else if (c == '1' || c == 'y' || c == 'Y')
679 experimEnabled = 1;
680 else if (c == '2')
681 experimEnabled = 2;
682
683 return count;
684 }
685
686 static int
687 linuxExtensionsEnabled_read(char *page, char **start, off_t off,
688 int count, int *eof, void *data)
689 {
690 int len;
691
692 len = sprintf(page, "%d\n", linuxExtEnabled);
693 len -= off;
694 *start = page + off;
695
696 if (len > count)
697 len = count;
698 else
699 *eof = 1;
700
701 if (len < 0)
702 len = 0;
703
704 return len;
705 }
706 static int
707 linuxExtensionsEnabled_write(struct file *file, const char __user *buffer,
708 unsigned long count, void *data)
709 {
710 char c;
711 int rc;
712
713 rc = get_user(c, buffer);
714 if (rc)
715 return rc;
716 if (c == '' || c == 'n' || c == 'N')
717 linuxExtEnabled = 0;
718 else if (c == '1' || c == 'y' || c == 'Y')
719 linuxExtEnabled = 1;
720
721 return count;
722 }
723
724
725 static int
726 lookupFlag_read(char *page, char **start, off_t off,
727 int count, int *eof, void *data)
728 {
729 int len;
730
731 len = sprintf(page, "%d\n", lookupCacheEnabled);
732
733 len -= off;
734 *start = page + off;
735
736 if (len > count)
737 len = count;
738 else
739 *eof = 1;
740
741 if (len < 0)
742 len = 0;
743
744 return len;
745 }
746 static int
747 lookupFlag_write(struct file *file, const char __user *buffer,
748 unsigned long count, void *data)
749 {
750 char c;
751 int rc;
752
753 rc = get_user(c, buffer);
754 if (rc)
755 return rc;
756 if (c == '' || c == 'n' || c == 'N')
757 lookupCacheEnabled = 0;
758 else if (c == '1' || c == 'y' || c == 'Y')
759 lookupCacheEnabled = 1;
760
761 return count;
762 }
763 static int
764 traceSMB_read(char *page, char **start, off_t off, int count,
765 int *eof, void *data)
766 {
767 int len;
768
769 len = sprintf(page, "%d\n", traceSMB);
770
771 len -= off;
772 *start = page + off;
773
774 if (len > count)
775 len = count;
776 else
777 *eof = 1;
778
779 if (len < 0)
780 len = 0;
781
782 return len;
783 }
784 static int
785 traceSMB_write(struct file *file, const char __user *buffer,
786 unsigned long count, void *data)
787 {
788 char c;
789 int rc;
790
791 rc = get_user(c, buffer);
792 if (rc)
793 return rc;
794 if (c == '' || c == 'n' || c == 'N')
795 traceSMB = 0;
796 else if (c == '1' || c == 'y' || c == 'Y')
797 traceSMB = 1;
798
799 return count;
800 }
801
802 static int
803 multiuser_mount_read(char *page, char **start, off_t off,
804 int count, int *eof, void *data)
805 {
806 int len;
807
808 len = sprintf(page, "%d\n", multiuser_mount);
809
810 len -= off;
811 *start = page + off;
812
813 if (len > count)
814 len = count;
815 else
816 *eof = 1;
817
818 if (len < 0)
819 len = 0;
820
821 return len;
822 }
823 static int
824 multiuser_mount_write(struct file *file, const char __user *buffer,
825 unsigned long count, void *data)
826 {
827 char c;
828 int rc;
829
830 rc = get_user(c, buffer);
831 if (rc)
832 return rc;
833 if (c == '' || c == 'n' || c == 'N')
834 multiuser_mount = 0;
835 else if (c == '1' || c == 'y' || c == 'Y')
836 multiuser_mount = 1;
837
838 return count;
839 }
840
841 static int
842 security_flags_read(char *page, char **start, off_t off,
843 int count, int *eof, void *data)
844 {
845 int len;
846
847 len = sprintf(page, "0x%x\n", extended_security);
848
849 len -= off;
850 *start = page + off;
851
852 if (len > count)
853 len = count;
854 else
855 *eof = 1;
856
857 if (len < 0)
858 len = 0;
859
860 return len;
861 }
862 static int
863 security_flags_write(struct file *file, const char __user *buffer,
864 unsigned long count, void *data)
865 {
866 unsigned int flags;
867 char flags_string[12];
868 char c;
869
870 if ((count < 1) || (count > 11))
871 return -EINVAL;
872
873 memset(flags_string, 0, 12);
874
875 if (copy_from_user(flags_string, buffer, count))
876 return -EFAULT;
877
878 if (count < 3) {
879 /* single char or single char followed by null */
880 c = flags_string[0];
881 if (c == '' || c == 'n' || c == 'N') {
882 extended_security = CIFSSEC_DEF; /* default */
883 return count;
884 } else if (c == '1' || c == 'y' || c == 'Y') {
885 extended_security = CIFSSEC_MAX;
886 return count;
887 } else if (!isdigit(c)) {
888 cERROR(1, ("invalid flag %c", c));
889 return -EINVAL;
890 }
891 }
892 /* else we have a number */
893
894 flags = simple_strtoul(flags_string, NULL, 0);
895
896 cFYI(1, ("sec flags 0x%x", flags));
897
898 if (flags <= 0) {
899 cERROR(1, ("invalid security flags %s", flags_string));
900 return -EINVAL;
901 }
902
903 if (flags & ~CIFSSEC_MASK) {
904 cERROR(1, ("attempt to set unsupported security flags 0x%x",
905 flags & ~CIFSSEC_MASK));
906 return -EINVAL;
907 }
908 /* flags look ok - update the global security flags for cifs module */
909 extended_security = flags;
910 if (extended_security & CIFSSEC_MUST_SIGN) {
911 /* requiring signing implies signing is allowed */
912 extended_security |= CIFSSEC_MAY_SIGN;
913 cFYI(1, ("packet signing now required"));
914 } else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
915 cFYI(1, ("packet signing disabled"));
916 }
917 /* BB should we turn on MAY flags for other MUST options? */
918 return count;
919 }
920 #else
921 inline void cifs_proc_init(void)
922 {
923 }
924
925 inline void cifs_proc_clean(void)
926 {
927 }
928 #endif /* PROC_FS */
929
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