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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 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 */
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * fs/cifs_debug.c
4 *
5 * Copyright (C) International Business Machines Corp., 2000,2005
6 *
7 * Modified by Steve French (sfrench@us.ibm.com)
8 */
9#include <linux/fs.h>
10#include <linux/string.h>
11#include <linux/ctype.h>
12#include <linux/module.h>
13#include <linux/proc_fs.h>
14#include <linux/uaccess.h>
15#include "cifspdu.h"
16#include "cifsglob.h"
17#include "cifsproto.h"
18#include "cifs_debug.h"
19#include "cifsfs.h"
20#ifdef CONFIG_CIFS_DFS_UPCALL
21#include "dfs_cache.h"
22#endif
23#ifdef CONFIG_CIFS_SMB_DIRECT
24#include "smbdirect.h"
25#endif
26
27void
28cifs_dump_mem(char *label, void *data, int length)
29{
30 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
31 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
32 data, length, true);
33}
34
35void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
36{
37#ifdef CONFIG_CIFS_DEBUG2
38 struct smb_hdr *smb = (struct smb_hdr *)buf;
39
40 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
41 smb->Command, smb->Status.CifsError,
42 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
43 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
44 server->ops->calc_smb_size(smb, server));
45#endif /* CONFIG_CIFS_DEBUG2 */
46}
47
48void cifs_dump_mids(struct TCP_Server_Info *server)
49{
50#ifdef CONFIG_CIFS_DEBUG2
51 struct list_head *tmp;
52 struct mid_q_entry *mid_entry;
53
54 if (server == NULL)
55 return;
56
57 cifs_dbg(VFS, "Dump pending requests:\n");
58 spin_lock(&GlobalMid_Lock);
59 list_for_each(tmp, &server->pending_mid_q) {
60 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
61 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
62 mid_entry->mid_state,
63 le16_to_cpu(mid_entry->command),
64 mid_entry->pid,
65 mid_entry->callback_data,
66 mid_entry->mid);
67#ifdef CONFIG_CIFS_STATS2
68 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
69 mid_entry->large_buf,
70 mid_entry->resp_buf,
71 mid_entry->when_received,
72 jiffies);
73#endif /* STATS2 */
74 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
75 mid_entry->multiRsp, mid_entry->multiEnd);
76 if (mid_entry->resp_buf) {
77 cifs_dump_detail(mid_entry->resp_buf, server);
78 cifs_dump_mem("existing buf: ",
79 mid_entry->resp_buf, 62);
80 }
81 }
82 spin_unlock(&GlobalMid_Lock);
83#endif /* CONFIG_CIFS_DEBUG2 */
84}
85
86#ifdef CONFIG_PROC_FS
87static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
88{
89 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
90
91 seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
92 if (tcon->nativeFileSystem)
93 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
94 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
95 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
96 le32_to_cpu(tcon->fsAttrInfo.Attributes),
97 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
98 tcon->tidStatus);
99 if (dev_type == FILE_DEVICE_DISK)
100 seq_puts(m, " type: DISK ");
101 else if (dev_type == FILE_DEVICE_CD_ROM)
102 seq_puts(m, " type: CDROM ");
103 else
104 seq_printf(m, " type: %d ", dev_type);
105
106 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
107
108 if ((tcon->seal) ||
109 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
110 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
111 seq_printf(m, " Encrypted");
112 if (tcon->nocase)
113 seq_printf(m, " nocase");
114 if (tcon->unix_ext)
115 seq_printf(m, " POSIX Extensions");
116 if (tcon->ses->server->ops->dump_share_caps)
117 tcon->ses->server->ops->dump_share_caps(m, tcon);
118
119 if (tcon->need_reconnect)
120 seq_puts(m, "\tDISCONNECTED ");
121 seq_putc(m, '\n');
122}
123
124static void
125cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
126{
127 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
128 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
129
130 seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
131 seq_puts(m, "\t\tCapabilities: ");
132 if (iface->rdma_capable)
133 seq_puts(m, "rdma ");
134 if (iface->rss_capable)
135 seq_puts(m, "rss ");
136 seq_putc(m, '\n');
137 if (iface->sockaddr.ss_family == AF_INET)
138 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
139 else if (iface->sockaddr.ss_family == AF_INET6)
140 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
141}
142
143static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
144{
145 struct list_head *stmp, *tmp, *tmp1, *tmp2;
146 struct TCP_Server_Info *server;
147 struct cifs_ses *ses;
148 struct cifs_tcon *tcon;
149 struct cifsFileInfo *cfile;
150
151 seq_puts(m, "# Version:1\n");
152 seq_puts(m, "# Format:\n");
153 seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
154#ifdef CONFIG_CIFS_DEBUG2
155 seq_printf(m, " <filename> <mid>\n");
156#else
157 seq_printf(m, " <filename>\n");
158#endif /* CIFS_DEBUG2 */
159 spin_lock(&cifs_tcp_ses_lock);
160 list_for_each(stmp, &cifs_tcp_ses_list) {
161 server = list_entry(stmp, struct TCP_Server_Info,
162 tcp_ses_list);
163 list_for_each(tmp, &server->smb_ses_list) {
164 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
165 list_for_each(tmp1, &ses->tcon_list) {
166 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
167 spin_lock(&tcon->open_file_lock);
168 list_for_each(tmp2, &tcon->openFileList) {
169 cfile = list_entry(tmp2, struct cifsFileInfo,
170 tlist);
171 seq_printf(m,
172 "0x%x 0x%llx 0x%x %d %d %d %s",
173 tcon->tid,
174 cfile->fid.persistent_fid,
175 cfile->f_flags,
176 cfile->count,
177 cfile->pid,
178 from_kuid(&init_user_ns, cfile->uid),
179 cfile->dentry->d_name.name);
180#ifdef CONFIG_CIFS_DEBUG2
181 seq_printf(m, " 0x%llx\n", cfile->fid.mid);
182#else
183 seq_printf(m, "\n");
184#endif /* CIFS_DEBUG2 */
185 }
186 spin_unlock(&tcon->open_file_lock);
187 }
188 }
189 }
190 spin_unlock(&cifs_tcp_ses_lock);
191 seq_putc(m, '\n');
192 return 0;
193}
194
195static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
196{
197 struct list_head *tmp1, *tmp2, *tmp3;
198 struct mid_q_entry *mid_entry;
199 struct TCP_Server_Info *server;
200 struct cifs_ses *ses;
201 struct cifs_tcon *tcon;
202 int i, j;
203
204 seq_puts(m,
205 "Display Internal CIFS Data Structures for Debugging\n"
206 "---------------------------------------------------\n");
207 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
208 seq_printf(m, "Features:");
209#ifdef CONFIG_CIFS_DFS_UPCALL
210 seq_printf(m, " DFS");
211#endif
212#ifdef CONFIG_CIFS_FSCACHE
213 seq_printf(m, ",FSCACHE");
214#endif
215#ifdef CONFIG_CIFS_SMB_DIRECT
216 seq_printf(m, ",SMB_DIRECT");
217#endif
218#ifdef CONFIG_CIFS_STATS2
219 seq_printf(m, ",STATS2");
220#else
221 seq_printf(m, ",STATS");
222#endif
223#ifdef CONFIG_CIFS_DEBUG2
224 seq_printf(m, ",DEBUG2");
225#elif defined(CONFIG_CIFS_DEBUG)
226 seq_printf(m, ",DEBUG");
227#endif
228#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
229 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
230#endif
231#ifdef CONFIG_CIFS_WEAK_PW_HASH
232 seq_printf(m, ",WEAK_PW_HASH");
233#endif
234#ifdef CONFIG_CIFS_POSIX
235 seq_printf(m, ",CIFS_POSIX");
236#endif
237#ifdef CONFIG_CIFS_UPCALL
238 seq_printf(m, ",UPCALL(SPNEGO)");
239#endif
240#ifdef CONFIG_CIFS_XATTR
241 seq_printf(m, ",XATTR");
242#endif
243 seq_printf(m, ",ACL");
244 seq_putc(m, '\n');
245 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
246 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
247 seq_printf(m, "Servers:");
248
249 i = 0;
250 spin_lock(&cifs_tcp_ses_lock);
251 list_for_each(tmp1, &cifs_tcp_ses_list) {
252 server = list_entry(tmp1, struct TCP_Server_Info,
253 tcp_ses_list);
254
255#ifdef CONFIG_CIFS_SMB_DIRECT
256 if (!server->rdma)
257 goto skip_rdma;
258
259 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
260 "transport status: %x",
261 server->smbd_conn->protocol,
262 server->smbd_conn->transport_status);
263 seq_printf(m, "\nConn receive_credit_max: %x "
264 "send_credit_target: %x max_send_size: %x",
265 server->smbd_conn->receive_credit_max,
266 server->smbd_conn->send_credit_target,
267 server->smbd_conn->max_send_size);
268 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
269 "max_fragmented_send_size: %x max_receive_size:%x",
270 server->smbd_conn->max_fragmented_recv_size,
271 server->smbd_conn->max_fragmented_send_size,
272 server->smbd_conn->max_receive_size);
273 seq_printf(m, "\nConn keep_alive_interval: %x "
274 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
275 server->smbd_conn->keep_alive_interval,
276 server->smbd_conn->max_readwrite_size,
277 server->smbd_conn->rdma_readwrite_threshold);
278 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
279 "count_put_receive_buffer: %x count_send_empty: %x",
280 server->smbd_conn->count_get_receive_buffer,
281 server->smbd_conn->count_put_receive_buffer,
282 server->smbd_conn->count_send_empty);
283 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
284 "count_enqueue_reassembly_queue: %x "
285 "count_dequeue_reassembly_queue: %x "
286 "fragment_reassembly_remaining: %x "
287 "reassembly_data_length: %x "
288 "reassembly_queue_length: %x",
289 server->smbd_conn->count_reassembly_queue,
290 server->smbd_conn->count_enqueue_reassembly_queue,
291 server->smbd_conn->count_dequeue_reassembly_queue,
292 server->smbd_conn->fragment_reassembly_remaining,
293 server->smbd_conn->reassembly_data_length,
294 server->smbd_conn->reassembly_queue_length);
295 seq_printf(m, "\nCurrent Credits send_credits: %x "
296 "receive_credits: %x receive_credit_target: %x",
297 atomic_read(&server->smbd_conn->send_credits),
298 atomic_read(&server->smbd_conn->receive_credits),
299 server->smbd_conn->receive_credit_target);
300 seq_printf(m, "\nPending send_pending: %x "
301 "send_payload_pending: %x",
302 atomic_read(&server->smbd_conn->send_pending),
303 atomic_read(&server->smbd_conn->send_payload_pending));
304 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
305 "count_empty_packet_queue: %x",
306 server->smbd_conn->count_receive_queue,
307 server->smbd_conn->count_empty_packet_queue);
308 seq_printf(m, "\nMR responder_resources: %x "
309 "max_frmr_depth: %x mr_type: %x",
310 server->smbd_conn->responder_resources,
311 server->smbd_conn->max_frmr_depth,
312 server->smbd_conn->mr_type);
313 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
314 atomic_read(&server->smbd_conn->mr_ready_count),
315 atomic_read(&server->smbd_conn->mr_used_count));
316skip_rdma:
317#endif
318 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
319 server->credits, server->dialect);
320 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
321 seq_printf(m, " COMPRESS_LZNT1");
322 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
323 seq_printf(m, " COMPRESS_LZ77");
324 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
325 seq_printf(m, " COMPRESS_LZ77_HUFF");
326 if (server->sign)
327 seq_printf(m, " signed");
328 if (server->posix_ext_supported)
329 seq_printf(m, " posix");
330
331 i++;
332 list_for_each(tmp2, &server->smb_ses_list) {
333 ses = list_entry(tmp2, struct cifs_ses,
334 smb_ses_list);
335 if ((ses->serverDomain == NULL) ||
336 (ses->serverOS == NULL) ||
337 (ses->serverNOS == NULL)) {
338 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
339 i, ses->serverName, ses->ses_count,
340 ses->capabilities, ses->status);
341 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
342 seq_printf(m, "Guest\t");
343 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
344 seq_printf(m, "Anonymous\t");
345 } else {
346 seq_printf(m,
347 "\n%d) Name: %s Domain: %s Uses: %d OS:"
348 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
349 " session status: %d ",
350 i, ses->serverName, ses->serverDomain,
351 ses->ses_count, ses->serverOS, ses->serverNOS,
352 ses->capabilities, ses->status);
353 }
354 if (server->rdma)
355 seq_printf(m, "RDMA\n\t");
356 seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
357 "Server: %d SecMode: 0x%x Req On Wire: %d",
358 server->tcpStatus,
359 server->reconnect_instance,
360 server->srv_count,
361 server->sec_mode, in_flight(server));
362
363#ifdef CONFIG_CIFS_STATS2
364 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
365 atomic_read(&server->in_send),
366 atomic_read(&server->num_waiters));
367#endif
368 /* dump session id helpful for use with network trace */
369 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
370 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
371 seq_puts(m, " encrypted");
372 if (ses->sign)
373 seq_puts(m, " signed");
374
375 seq_puts(m, "\n\tShares:");
376 j = 0;
377
378 seq_printf(m, "\n\t%d) IPC: ", j);
379 if (ses->tcon_ipc)
380 cifs_debug_tcon(m, ses->tcon_ipc);
381 else
382 seq_puts(m, "none\n");
383
384 list_for_each(tmp3, &ses->tcon_list) {
385 tcon = list_entry(tmp3, struct cifs_tcon,
386 tcon_list);
387 ++j;
388 seq_printf(m, "\n\t%d) ", j);
389 cifs_debug_tcon(m, tcon);
390 }
391
392 seq_puts(m, "\n\tMIDs:\n");
393
394 spin_lock(&GlobalMid_Lock);
395 list_for_each(tmp3, &server->pending_mid_q) {
396 mid_entry = list_entry(tmp3, struct mid_q_entry,
397 qhead);
398 seq_printf(m, "\tState: %d com: %d pid:"
399 " %d cbdata: %p mid %llu\n",
400 mid_entry->mid_state,
401 le16_to_cpu(mid_entry->command),
402 mid_entry->pid,
403 mid_entry->callback_data,
404 mid_entry->mid);
405 }
406 spin_unlock(&GlobalMid_Lock);
407
408 spin_lock(&ses->iface_lock);
409 if (ses->iface_count)
410 seq_printf(m, "\n\tServer interfaces: %zu\n",
411 ses->iface_count);
412 for (j = 0; j < ses->iface_count; j++) {
413 seq_printf(m, "\t%d)", j);
414 cifs_dump_iface(m, &ses->iface_list[j]);
415 }
416 spin_unlock(&ses->iface_lock);
417 }
418 }
419 spin_unlock(&cifs_tcp_ses_lock);
420 seq_putc(m, '\n');
421
422 /* BB add code to dump additional info such as TCP session info now */
423 return 0;
424}
425
426static ssize_t cifs_stats_proc_write(struct file *file,
427 const char __user *buffer, size_t count, loff_t *ppos)
428{
429 bool bv;
430 int rc;
431 struct list_head *tmp1, *tmp2, *tmp3;
432 struct TCP_Server_Info *server;
433 struct cifs_ses *ses;
434 struct cifs_tcon *tcon;
435
436 rc = kstrtobool_from_user(buffer, count, &bv);
437 if (rc == 0) {
438#ifdef CONFIG_CIFS_STATS2
439 int i;
440
441 atomic_set(&totBufAllocCount, 0);
442 atomic_set(&totSmBufAllocCount, 0);
443#endif /* CONFIG_CIFS_STATS2 */
444 atomic_set(&tcpSesReconnectCount, 0);
445 atomic_set(&tconInfoReconnectCount, 0);
446
447 spin_lock(&GlobalMid_Lock);
448 GlobalMaxActiveXid = 0;
449 GlobalCurrentXid = 0;
450 spin_unlock(&GlobalMid_Lock);
451 spin_lock(&cifs_tcp_ses_lock);
452 list_for_each(tmp1, &cifs_tcp_ses_list) {
453 server = list_entry(tmp1, struct TCP_Server_Info,
454 tcp_ses_list);
455 server->max_in_flight = 0;
456#ifdef CONFIG_CIFS_STATS2
457 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
458 atomic_set(&server->num_cmds[i], 0);
459 atomic_set(&server->smb2slowcmd[i], 0);
460 server->time_per_cmd[i] = 0;
461 server->slowest_cmd[i] = 0;
462 server->fastest_cmd[0] = 0;
463 }
464#endif /* CONFIG_CIFS_STATS2 */
465 list_for_each(tmp2, &server->smb_ses_list) {
466 ses = list_entry(tmp2, struct cifs_ses,
467 smb_ses_list);
468 list_for_each(tmp3, &ses->tcon_list) {
469 tcon = list_entry(tmp3,
470 struct cifs_tcon,
471 tcon_list);
472 atomic_set(&tcon->num_smbs_sent, 0);
473 spin_lock(&tcon->stat_lock);
474 tcon->bytes_read = 0;
475 tcon->bytes_written = 0;
476 spin_unlock(&tcon->stat_lock);
477 if (server->ops->clear_stats)
478 server->ops->clear_stats(tcon);
479 }
480 }
481 }
482 spin_unlock(&cifs_tcp_ses_lock);
483 } else {
484 return rc;
485 }
486
487 return count;
488}
489
490static int cifs_stats_proc_show(struct seq_file *m, void *v)
491{
492 int i;
493#ifdef CONFIG_CIFS_STATS2
494 int j;
495#endif /* STATS2 */
496 struct list_head *tmp1, *tmp2, *tmp3;
497 struct TCP_Server_Info *server;
498 struct cifs_ses *ses;
499 struct cifs_tcon *tcon;
500
501 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
502 sesInfoAllocCount.counter);
503 seq_printf(m, "Share (unique mount targets): %d\n",
504 tconInfoAllocCount.counter);
505 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
506 bufAllocCount.counter,
507 cifs_min_rcv + tcpSesAllocCount.counter);
508 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
509 smBufAllocCount.counter, cifs_min_small);
510#ifdef CONFIG_CIFS_STATS2
511 seq_printf(m, "Total Large %d Small %d Allocations\n",
512 atomic_read(&totBufAllocCount),
513 atomic_read(&totSmBufAllocCount));
514#endif /* CONFIG_CIFS_STATS2 */
515
516 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
517 seq_printf(m,
518 "\n%d session %d share reconnects\n",
519 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
520
521 seq_printf(m,
522 "Total vfs operations: %d maximum at one time: %d\n",
523 GlobalCurrentXid, GlobalMaxActiveXid);
524
525 i = 0;
526 spin_lock(&cifs_tcp_ses_lock);
527 list_for_each(tmp1, &cifs_tcp_ses_list) {
528 server = list_entry(tmp1, struct TCP_Server_Info,
529 tcp_ses_list);
530 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
531#ifdef CONFIG_CIFS_STATS2
532 seq_puts(m, "\nTotal time spent processing by command. Time ");
533 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
534 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
535 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
536 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
537 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
538 atomic_read(&server->num_cmds[j]),
539 server->time_per_cmd[j],
540 server->fastest_cmd[j],
541 server->slowest_cmd[j]);
542 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
543 if (atomic_read(&server->smb2slowcmd[j]))
544 seq_printf(m, " %d slow responses from %s for command %d\n",
545 atomic_read(&server->smb2slowcmd[j]),
546 server->hostname, j);
547#endif /* STATS2 */
548 list_for_each(tmp2, &server->smb_ses_list) {
549 ses = list_entry(tmp2, struct cifs_ses,
550 smb_ses_list);
551 list_for_each(tmp3, &ses->tcon_list) {
552 tcon = list_entry(tmp3,
553 struct cifs_tcon,
554 tcon_list);
555 i++;
556 seq_printf(m, "\n%d) %s", i, tcon->treeName);
557 if (tcon->need_reconnect)
558 seq_puts(m, "\tDISCONNECTED ");
559 seq_printf(m, "\nSMBs: %d",
560 atomic_read(&tcon->num_smbs_sent));
561 if (server->ops->print_stats)
562 server->ops->print_stats(m, tcon);
563 }
564 }
565 }
566 spin_unlock(&cifs_tcp_ses_lock);
567
568 seq_putc(m, '\n');
569 return 0;
570}
571
572static int cifs_stats_proc_open(struct inode *inode, struct file *file)
573{
574 return single_open(file, cifs_stats_proc_show, NULL);
575}
576
577static const struct file_operations cifs_stats_proc_fops = {
578 .open = cifs_stats_proc_open,
579 .read = seq_read,
580 .llseek = seq_lseek,
581 .release = single_release,
582 .write = cifs_stats_proc_write,
583};
584
585#ifdef CONFIG_CIFS_SMB_DIRECT
586#define PROC_FILE_DEFINE(name) \
587static ssize_t name##_write(struct file *file, const char __user *buffer, \
588 size_t count, loff_t *ppos) \
589{ \
590 int rc; \
591 rc = kstrtoint_from_user(buffer, count, 10, & name); \
592 if (rc) \
593 return rc; \
594 return count; \
595} \
596static int name##_proc_show(struct seq_file *m, void *v) \
597{ \
598 seq_printf(m, "%d\n", name ); \
599 return 0; \
600} \
601static int name##_open(struct inode *inode, struct file *file) \
602{ \
603 return single_open(file, name##_proc_show, NULL); \
604} \
605\
606static const struct file_operations cifs_##name##_proc_fops = { \
607 .open = name##_open, \
608 .read = seq_read, \
609 .llseek = seq_lseek, \
610 .release = single_release, \
611 .write = name##_write, \
612}
613
614PROC_FILE_DEFINE(rdma_readwrite_threshold);
615PROC_FILE_DEFINE(smbd_max_frmr_depth);
616PROC_FILE_DEFINE(smbd_keep_alive_interval);
617PROC_FILE_DEFINE(smbd_max_receive_size);
618PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
619PROC_FILE_DEFINE(smbd_max_send_size);
620PROC_FILE_DEFINE(smbd_send_credit_target);
621PROC_FILE_DEFINE(smbd_receive_credit_max);
622#endif
623
624static struct proc_dir_entry *proc_fs_cifs;
625static const struct file_operations cifsFYI_proc_fops;
626static const struct file_operations cifs_lookup_cache_proc_fops;
627static const struct file_operations traceSMB_proc_fops;
628static const struct file_operations cifs_security_flags_proc_fops;
629static const struct file_operations cifs_linux_ext_proc_fops;
630
631void
632cifs_proc_init(void)
633{
634 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
635 if (proc_fs_cifs == NULL)
636 return;
637
638 proc_create_single("DebugData", 0, proc_fs_cifs,
639 cifs_debug_data_proc_show);
640
641 proc_create_single("open_files", 0400, proc_fs_cifs,
642 cifs_debug_files_proc_show);
643
644 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
645 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
646 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
647 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
648 &cifs_linux_ext_proc_fops);
649 proc_create("SecurityFlags", 0644, proc_fs_cifs,
650 &cifs_security_flags_proc_fops);
651 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
652 &cifs_lookup_cache_proc_fops);
653
654#ifdef CONFIG_CIFS_DFS_UPCALL
655 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops);
656#endif
657
658#ifdef CONFIG_CIFS_SMB_DIRECT
659 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
660 &cifs_rdma_readwrite_threshold_proc_fops);
661 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
662 &cifs_smbd_max_frmr_depth_proc_fops);
663 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
664 &cifs_smbd_keep_alive_interval_proc_fops);
665 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
666 &cifs_smbd_max_receive_size_proc_fops);
667 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
668 &cifs_smbd_max_fragmented_recv_size_proc_fops);
669 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
670 &cifs_smbd_max_send_size_proc_fops);
671 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
672 &cifs_smbd_send_credit_target_proc_fops);
673 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
674 &cifs_smbd_receive_credit_max_proc_fops);
675#endif
676}
677
678void
679cifs_proc_clean(void)
680{
681 if (proc_fs_cifs == NULL)
682 return;
683
684 remove_proc_entry("DebugData", proc_fs_cifs);
685 remove_proc_entry("open_files", proc_fs_cifs);
686 remove_proc_entry("cifsFYI", proc_fs_cifs);
687 remove_proc_entry("traceSMB", proc_fs_cifs);
688 remove_proc_entry("Stats", proc_fs_cifs);
689 remove_proc_entry("SecurityFlags", proc_fs_cifs);
690 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
691 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
692
693#ifdef CONFIG_CIFS_DFS_UPCALL
694 remove_proc_entry("dfscache", proc_fs_cifs);
695#endif
696#ifdef CONFIG_CIFS_SMB_DIRECT
697 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
698 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
699 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
700 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
701 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
702 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
703 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
704 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
705#endif
706 remove_proc_entry("fs/cifs", NULL);
707}
708
709static int cifsFYI_proc_show(struct seq_file *m, void *v)
710{
711 seq_printf(m, "%d\n", cifsFYI);
712 return 0;
713}
714
715static int cifsFYI_proc_open(struct inode *inode, struct file *file)
716{
717 return single_open(file, cifsFYI_proc_show, NULL);
718}
719
720static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
721 size_t count, loff_t *ppos)
722{
723 char c[2] = { '\0' };
724 bool bv;
725 int rc;
726
727 rc = get_user(c[0], buffer);
728 if (rc)
729 return rc;
730 if (strtobool(c, &bv) == 0)
731 cifsFYI = bv;
732 else if ((c[0] > '1') && (c[0] <= '9'))
733 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
734 else
735 return -EINVAL;
736
737 return count;
738}
739
740static const struct file_operations cifsFYI_proc_fops = {
741 .open = cifsFYI_proc_open,
742 .read = seq_read,
743 .llseek = seq_lseek,
744 .release = single_release,
745 .write = cifsFYI_proc_write,
746};
747
748static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
749{
750 seq_printf(m, "%d\n", linuxExtEnabled);
751 return 0;
752}
753
754static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
755{
756 return single_open(file, cifs_linux_ext_proc_show, NULL);
757}
758
759static ssize_t cifs_linux_ext_proc_write(struct file *file,
760 const char __user *buffer, size_t count, loff_t *ppos)
761{
762 int rc;
763
764 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
765 if (rc)
766 return rc;
767
768 return count;
769}
770
771static const struct file_operations cifs_linux_ext_proc_fops = {
772 .open = cifs_linux_ext_proc_open,
773 .read = seq_read,
774 .llseek = seq_lseek,
775 .release = single_release,
776 .write = cifs_linux_ext_proc_write,
777};
778
779static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
780{
781 seq_printf(m, "%d\n", lookupCacheEnabled);
782 return 0;
783}
784
785static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
786{
787 return single_open(file, cifs_lookup_cache_proc_show, NULL);
788}
789
790static ssize_t cifs_lookup_cache_proc_write(struct file *file,
791 const char __user *buffer, size_t count, loff_t *ppos)
792{
793 int rc;
794
795 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
796 if (rc)
797 return rc;
798
799 return count;
800}
801
802static const struct file_operations cifs_lookup_cache_proc_fops = {
803 .open = cifs_lookup_cache_proc_open,
804 .read = seq_read,
805 .llseek = seq_lseek,
806 .release = single_release,
807 .write = cifs_lookup_cache_proc_write,
808};
809
810static int traceSMB_proc_show(struct seq_file *m, void *v)
811{
812 seq_printf(m, "%d\n", traceSMB);
813 return 0;
814}
815
816static int traceSMB_proc_open(struct inode *inode, struct file *file)
817{
818 return single_open(file, traceSMB_proc_show, NULL);
819}
820
821static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
822 size_t count, loff_t *ppos)
823{
824 int rc;
825
826 rc = kstrtobool_from_user(buffer, count, &traceSMB);
827 if (rc)
828 return rc;
829
830 return count;
831}
832
833static const struct file_operations traceSMB_proc_fops = {
834 .open = traceSMB_proc_open,
835 .read = seq_read,
836 .llseek = seq_lseek,
837 .release = single_release,
838 .write = traceSMB_proc_write,
839};
840
841static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
842{
843 seq_printf(m, "0x%x\n", global_secflags);
844 return 0;
845}
846
847static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
848{
849 return single_open(file, cifs_security_flags_proc_show, NULL);
850}
851
852/*
853 * Ensure that if someone sets a MUST flag, that we disable all other MAY
854 * flags except for the ones corresponding to the given MUST flag. If there are
855 * multiple MUST flags, then try to prefer more secure ones.
856 */
857static void
858cifs_security_flags_handle_must_flags(unsigned int *flags)
859{
860 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
861
862 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
863 *flags = CIFSSEC_MUST_KRB5;
864 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
865 *flags = CIFSSEC_MUST_NTLMSSP;
866 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
867 *flags = CIFSSEC_MUST_NTLMV2;
868 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
869 *flags = CIFSSEC_MUST_NTLM;
870 else if (CIFSSEC_MUST_LANMAN &&
871 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
872 *flags = CIFSSEC_MUST_LANMAN;
873 else if (CIFSSEC_MUST_PLNTXT &&
874 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
875 *flags = CIFSSEC_MUST_PLNTXT;
876
877 *flags |= signflags;
878}
879
880static ssize_t cifs_security_flags_proc_write(struct file *file,
881 const char __user *buffer, size_t count, loff_t *ppos)
882{
883 int rc;
884 unsigned int flags;
885 char flags_string[12];
886 bool bv;
887
888 if ((count < 1) || (count > 11))
889 return -EINVAL;
890
891 memset(flags_string, 0, 12);
892
893 if (copy_from_user(flags_string, buffer, count))
894 return -EFAULT;
895
896 if (count < 3) {
897 /* single char or single char followed by null */
898 if (strtobool(flags_string, &bv) == 0) {
899 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
900 return count;
901 } else if (!isdigit(flags_string[0])) {
902 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
903 flags_string);
904 return -EINVAL;
905 }
906 }
907
908 /* else we have a number */
909 rc = kstrtouint(flags_string, 0, &flags);
910 if (rc) {
911 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
912 flags_string);
913 return rc;
914 }
915
916 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
917
918 if (flags == 0) {
919 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
920 return -EINVAL;
921 }
922
923 if (flags & ~CIFSSEC_MASK) {
924 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
925 flags & ~CIFSSEC_MASK);
926 return -EINVAL;
927 }
928
929 cifs_security_flags_handle_must_flags(&flags);
930
931 /* flags look ok - update the global security flags for cifs module */
932 global_secflags = flags;
933 if (global_secflags & CIFSSEC_MUST_SIGN) {
934 /* requiring signing implies signing is allowed */
935 global_secflags |= CIFSSEC_MAY_SIGN;
936 cifs_dbg(FYI, "packet signing now required\n");
937 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
938 cifs_dbg(FYI, "packet signing disabled\n");
939 }
940 /* BB should we turn on MAY flags for other MUST options? */
941 return count;
942}
943
944static const struct file_operations cifs_security_flags_proc_fops = {
945 .open = cifs_security_flags_proc_open,
946 .read = seq_read,
947 .llseek = seq_lseek,
948 .release = single_release,
949 .write = cifs_security_flags_proc_write,
950};
951#else
952inline void cifs_proc_init(void)
953{
954}
955
956inline void cifs_proc_clean(void)
957{
958}
959#endif /* PROC_FS */