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22#include <linux/fs.h>
23#include <linux/string.h>
24#include <linux/ctype.h>
25#include <linux/module.h>
26#include <linux/proc_fs.h>
27#include <asm/uaccess.h>
28#include "cifspdu.h"
29#include "cifsglob.h"
30#include "cifsproto.h"
31#include "cifs_debug.h"
32#include "cifsfs.h"
33
34void
35cifs_dump_mem(char *label, void *data, int length)
36{
37 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
38 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
39 data, length, true);
40}
41
42#ifdef CONFIG_CIFS_DEBUG
43void cifs_vfs_err(const char *fmt, ...)
44{
45 struct va_format vaf;
46 va_list args;
47
48 va_start(args, fmt);
49
50 vaf.fmt = fmt;
51 vaf.va = &args;
52
53 pr_err("CIFS VFS: %pV", &vaf);
54
55 va_end(args);
56}
57#endif
58
59void cifs_dump_detail(void *buf)
60{
61#ifdef CONFIG_CIFS_DEBUG2
62 struct smb_hdr *smb = (struct smb_hdr *)buf;
63
64 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
65 smb->Command, smb->Status.CifsError,
66 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
67 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smbCalcSize(smb));
68#endif
69}
70
71void cifs_dump_mids(struct TCP_Server_Info *server)
72{
73#ifdef CONFIG_CIFS_DEBUG2
74 struct list_head *tmp;
75 struct mid_q_entry *mid_entry;
76
77 if (server == NULL)
78 return;
79
80 cifs_dbg(VFS, "Dump pending requests:\n");
81 spin_lock(&GlobalMid_Lock);
82 list_for_each(tmp, &server->pending_mid_q) {
83 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
84 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
85 mid_entry->mid_state,
86 le16_to_cpu(mid_entry->command),
87 mid_entry->pid,
88 mid_entry->callback_data,
89 mid_entry->mid);
90#ifdef CONFIG_CIFS_STATS2
91 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
92 mid_entry->large_buf,
93 mid_entry->resp_buf,
94 mid_entry->when_received,
95 jiffies);
96#endif
97 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
98 mid_entry->multiRsp, mid_entry->multiEnd);
99 if (mid_entry->resp_buf) {
100 cifs_dump_detail(mid_entry->resp_buf);
101 cifs_dump_mem("existing buf: ",
102 mid_entry->resp_buf, 62);
103 }
104 }
105 spin_unlock(&GlobalMid_Lock);
106#endif
107}
108
109#ifdef CONFIG_PROC_FS
110static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
111{
112 struct list_head *tmp1, *tmp2, *tmp3;
113 struct mid_q_entry *mid_entry;
114 struct TCP_Server_Info *server;
115 struct cifs_ses *ses;
116 struct cifs_tcon *tcon;
117 int i, j;
118 __u32 dev_type;
119
120 seq_puts(m,
121 "Display Internal CIFS Data Structures for Debugging\n"
122 "---------------------------------------------------\n");
123 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
124 seq_printf(m, "Features:");
125#ifdef CONFIG_CIFS_DFS_UPCALL
126 seq_printf(m, " dfs");
127#endif
128#ifdef CONFIG_CIFS_FSCACHE
129 seq_printf(m, " fscache");
130#endif
131#ifdef CONFIG_CIFS_WEAK_PW_HASH
132 seq_printf(m, " lanman");
133#endif
134#ifdef CONFIG_CIFS_POSIX
135 seq_printf(m, " posix");
136#endif
137#ifdef CONFIG_CIFS_UPCALL
138 seq_printf(m, " spnego");
139#endif
140#ifdef CONFIG_CIFS_XATTR
141 seq_printf(m, " xattr");
142#endif
143#ifdef CONFIG_CIFS_ACL
144 seq_printf(m, " acl");
145#endif
146 seq_putc(m, '\n');
147 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
148 seq_printf(m, "Servers:");
149
150 i = 0;
151 spin_lock(&cifs_tcp_ses_lock);
152 list_for_each(tmp1, &cifs_tcp_ses_list) {
153 server = list_entry(tmp1, struct TCP_Server_Info,
154 tcp_ses_list);
155 i++;
156 list_for_each(tmp2, &server->smb_ses_list) {
157 ses = list_entry(tmp2, struct cifs_ses,
158 smb_ses_list);
159 if ((ses->serverDomain == NULL) ||
160 (ses->serverOS == NULL) ||
161 (ses->serverNOS == NULL)) {
162 seq_printf(m, "\n%d) entry for %s not fully "
163 "displayed\n\t", i, ses->serverName);
164 } else {
165 seq_printf(m,
166 "\n%d) Name: %s Domain: %s Uses: %d OS:"
167 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
168 " session status: %d\t",
169 i, ses->serverName, ses->serverDomain,
170 ses->ses_count, ses->serverOS, ses->serverNOS,
171 ses->capabilities, ses->status);
172 }
173 seq_printf(m, "TCP status: %d\n\tLocal Users To "
174 "Server: %d SecMode: 0x%x Req On Wire: %d",
175 server->tcpStatus, server->srv_count,
176 server->sec_mode, in_flight(server));
177
178#ifdef CONFIG_CIFS_STATS2
179 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
180 atomic_read(&server->in_send),
181 atomic_read(&server->num_waiters));
182#endif
183
184 seq_puts(m, "\n\tShares:");
185 j = 0;
186 list_for_each(tmp3, &ses->tcon_list) {
187 tcon = list_entry(tmp3, struct cifs_tcon,
188 tcon_list);
189 ++j;
190 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
191 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
192 tcon->treeName, tcon->tc_count);
193 if (tcon->nativeFileSystem) {
194 seq_printf(m, "Type: %s ",
195 tcon->nativeFileSystem);
196 }
197 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
198 "\n\tPathComponentMax: %d Status: %d",
199 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
200 le32_to_cpu(tcon->fsAttrInfo.Attributes),
201 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
202 tcon->tidStatus);
203 if (dev_type == FILE_DEVICE_DISK)
204 seq_puts(m, " type: DISK ");
205 else if (dev_type == FILE_DEVICE_CD_ROM)
206 seq_puts(m, " type: CDROM ");
207 else
208 seq_printf(m, " type: %d ", dev_type);
209 if (server->ops->dump_share_caps)
210 server->ops->dump_share_caps(m, tcon);
211
212 if (tcon->need_reconnect)
213 seq_puts(m, "\tDISCONNECTED ");
214 seq_putc(m, '\n');
215 }
216
217 seq_puts(m, "\n\tMIDs:\n");
218
219 spin_lock(&GlobalMid_Lock);
220 list_for_each(tmp3, &server->pending_mid_q) {
221 mid_entry = list_entry(tmp3, struct mid_q_entry,
222 qhead);
223 seq_printf(m, "\tState: %d com: %d pid:"
224 " %d cbdata: %p mid %llu\n",
225 mid_entry->mid_state,
226 le16_to_cpu(mid_entry->command),
227 mid_entry->pid,
228 mid_entry->callback_data,
229 mid_entry->mid);
230 }
231 spin_unlock(&GlobalMid_Lock);
232 }
233 }
234 spin_unlock(&cifs_tcp_ses_lock);
235 seq_putc(m, '\n');
236
237
238 return 0;
239}
240
241static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
242{
243 return single_open(file, cifs_debug_data_proc_show, NULL);
244}
245
246static const struct file_operations cifs_debug_data_proc_fops = {
247 .owner = THIS_MODULE,
248 .open = cifs_debug_data_proc_open,
249 .read = seq_read,
250 .llseek = seq_lseek,
251 .release = single_release,
252};
253
254#ifdef CONFIG_CIFS_STATS
255static ssize_t cifs_stats_proc_write(struct file *file,
256 const char __user *buffer, size_t count, loff_t *ppos)
257{
258 char c;
259 bool bv;
260 int rc;
261 struct list_head *tmp1, *tmp2, *tmp3;
262 struct TCP_Server_Info *server;
263 struct cifs_ses *ses;
264 struct cifs_tcon *tcon;
265
266 rc = get_user(c, buffer);
267 if (rc)
268 return rc;
269
270 if (strtobool(&c, &bv) == 0) {
271#ifdef CONFIG_CIFS_STATS2
272 atomic_set(&totBufAllocCount, 0);
273 atomic_set(&totSmBufAllocCount, 0);
274#endif
275 spin_lock(&cifs_tcp_ses_lock);
276 list_for_each(tmp1, &cifs_tcp_ses_list) {
277 server = list_entry(tmp1, struct TCP_Server_Info,
278 tcp_ses_list);
279 list_for_each(tmp2, &server->smb_ses_list) {
280 ses = list_entry(tmp2, struct cifs_ses,
281 smb_ses_list);
282 list_for_each(tmp3, &ses->tcon_list) {
283 tcon = list_entry(tmp3,
284 struct cifs_tcon,
285 tcon_list);
286 atomic_set(&tcon->num_smbs_sent, 0);
287 if (server->ops->clear_stats)
288 server->ops->clear_stats(tcon);
289 }
290 }
291 }
292 spin_unlock(&cifs_tcp_ses_lock);
293 }
294
295 return count;
296}
297
298static int cifs_stats_proc_show(struct seq_file *m, void *v)
299{
300 int i;
301 struct list_head *tmp1, *tmp2, *tmp3;
302 struct TCP_Server_Info *server;
303 struct cifs_ses *ses;
304 struct cifs_tcon *tcon;
305
306 seq_printf(m,
307 "Resources in use\nCIFS Session: %d\n",
308 sesInfoAllocCount.counter);
309 seq_printf(m, "Share (unique mount targets): %d\n",
310 tconInfoAllocCount.counter);
311 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
312 bufAllocCount.counter,
313 cifs_min_rcv + tcpSesAllocCount.counter);
314 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
315 smBufAllocCount.counter, cifs_min_small);
316#ifdef CONFIG_CIFS_STATS2
317 seq_printf(m, "Total Large %d Small %d Allocations\n",
318 atomic_read(&totBufAllocCount),
319 atomic_read(&totSmBufAllocCount));
320#endif
321
322 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
323 seq_printf(m,
324 "\n%d session %d share reconnects\n",
325 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
326
327 seq_printf(m,
328 "Total vfs operations: %d maximum at one time: %d\n",
329 GlobalCurrentXid, GlobalMaxActiveXid);
330
331 i = 0;
332 spin_lock(&cifs_tcp_ses_lock);
333 list_for_each(tmp1, &cifs_tcp_ses_list) {
334 server = list_entry(tmp1, struct TCP_Server_Info,
335 tcp_ses_list);
336 list_for_each(tmp2, &server->smb_ses_list) {
337 ses = list_entry(tmp2, struct cifs_ses,
338 smb_ses_list);
339 list_for_each(tmp3, &ses->tcon_list) {
340 tcon = list_entry(tmp3,
341 struct cifs_tcon,
342 tcon_list);
343 i++;
344 seq_printf(m, "\n%d) %s", i, tcon->treeName);
345 if (tcon->need_reconnect)
346 seq_puts(m, "\tDISCONNECTED ");
347 seq_printf(m, "\nSMBs: %d",
348 atomic_read(&tcon->num_smbs_sent));
349 if (server->ops->print_stats)
350 server->ops->print_stats(m, tcon);
351 }
352 }
353 }
354 spin_unlock(&cifs_tcp_ses_lock);
355
356 seq_putc(m, '\n');
357 return 0;
358}
359
360static int cifs_stats_proc_open(struct inode *inode, struct file *file)
361{
362 return single_open(file, cifs_stats_proc_show, NULL);
363}
364
365static const struct file_operations cifs_stats_proc_fops = {
366 .owner = THIS_MODULE,
367 .open = cifs_stats_proc_open,
368 .read = seq_read,
369 .llseek = seq_lseek,
370 .release = single_release,
371 .write = cifs_stats_proc_write,
372};
373#endif
374
375static struct proc_dir_entry *proc_fs_cifs;
376static const struct file_operations cifsFYI_proc_fops;
377static const struct file_operations cifs_lookup_cache_proc_fops;
378static const struct file_operations traceSMB_proc_fops;
379static const struct file_operations cifs_security_flags_proc_fops;
380static const struct file_operations cifs_linux_ext_proc_fops;
381
382void
383cifs_proc_init(void)
384{
385 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
386 if (proc_fs_cifs == NULL)
387 return;
388
389 proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
390
391#ifdef CONFIG_CIFS_STATS
392 proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
393#endif
394 proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
395 proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
396 proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
397 &cifs_linux_ext_proc_fops);
398 proc_create("SecurityFlags", 0, proc_fs_cifs,
399 &cifs_security_flags_proc_fops);
400 proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
401 &cifs_lookup_cache_proc_fops);
402}
403
404void
405cifs_proc_clean(void)
406{
407 if (proc_fs_cifs == NULL)
408 return;
409
410 remove_proc_entry("DebugData", proc_fs_cifs);
411 remove_proc_entry("cifsFYI", proc_fs_cifs);
412 remove_proc_entry("traceSMB", proc_fs_cifs);
413#ifdef CONFIG_CIFS_STATS
414 remove_proc_entry("Stats", proc_fs_cifs);
415#endif
416 remove_proc_entry("SecurityFlags", proc_fs_cifs);
417 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
418 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
419 remove_proc_entry("fs/cifs", NULL);
420}
421
422static int cifsFYI_proc_show(struct seq_file *m, void *v)
423{
424 seq_printf(m, "%d\n", cifsFYI);
425 return 0;
426}
427
428static int cifsFYI_proc_open(struct inode *inode, struct file *file)
429{
430 return single_open(file, cifsFYI_proc_show, NULL);
431}
432
433static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
434 size_t count, loff_t *ppos)
435{
436 char c;
437 bool bv;
438 int rc;
439
440 rc = get_user(c, buffer);
441 if (rc)
442 return rc;
443 if (strtobool(&c, &bv) == 0)
444 cifsFYI = bv;
445 else if ((c > '1') && (c <= '9'))
446 cifsFYI = (int) (c - '0');
447
448 return count;
449}
450
451static const struct file_operations cifsFYI_proc_fops = {
452 .owner = THIS_MODULE,
453 .open = cifsFYI_proc_open,
454 .read = seq_read,
455 .llseek = seq_lseek,
456 .release = single_release,
457 .write = cifsFYI_proc_write,
458};
459
460static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
461{
462 seq_printf(m, "%d\n", linuxExtEnabled);
463 return 0;
464}
465
466static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
467{
468 return single_open(file, cifs_linux_ext_proc_show, NULL);
469}
470
471static ssize_t cifs_linux_ext_proc_write(struct file *file,
472 const char __user *buffer, size_t count, loff_t *ppos)
473{
474 char c;
475 bool bv;
476 int rc;
477
478 rc = get_user(c, buffer);
479 if (rc)
480 return rc;
481
482 rc = strtobool(&c, &bv);
483 if (rc)
484 return rc;
485
486 linuxExtEnabled = bv;
487
488 return count;
489}
490
491static const struct file_operations cifs_linux_ext_proc_fops = {
492 .owner = THIS_MODULE,
493 .open = cifs_linux_ext_proc_open,
494 .read = seq_read,
495 .llseek = seq_lseek,
496 .release = single_release,
497 .write = cifs_linux_ext_proc_write,
498};
499
500static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
501{
502 seq_printf(m, "%d\n", lookupCacheEnabled);
503 return 0;
504}
505
506static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
507{
508 return single_open(file, cifs_lookup_cache_proc_show, NULL);
509}
510
511static ssize_t cifs_lookup_cache_proc_write(struct file *file,
512 const char __user *buffer, size_t count, loff_t *ppos)
513{
514 char c;
515 bool bv;
516 int rc;
517
518 rc = get_user(c, buffer);
519 if (rc)
520 return rc;
521
522 rc = strtobool(&c, &bv);
523 if (rc)
524 return rc;
525
526 lookupCacheEnabled = bv;
527
528 return count;
529}
530
531static const struct file_operations cifs_lookup_cache_proc_fops = {
532 .owner = THIS_MODULE,
533 .open = cifs_lookup_cache_proc_open,
534 .read = seq_read,
535 .llseek = seq_lseek,
536 .release = single_release,
537 .write = cifs_lookup_cache_proc_write,
538};
539
540static int traceSMB_proc_show(struct seq_file *m, void *v)
541{
542 seq_printf(m, "%d\n", traceSMB);
543 return 0;
544}
545
546static int traceSMB_proc_open(struct inode *inode, struct file *file)
547{
548 return single_open(file, traceSMB_proc_show, NULL);
549}
550
551static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
552 size_t count, loff_t *ppos)
553{
554 char c;
555 bool bv;
556 int rc;
557
558 rc = get_user(c, buffer);
559 if (rc)
560 return rc;
561
562 rc = strtobool(&c, &bv);
563 if (rc)
564 return rc;
565
566 traceSMB = bv;
567
568 return count;
569}
570
571static const struct file_operations traceSMB_proc_fops = {
572 .owner = THIS_MODULE,
573 .open = traceSMB_proc_open,
574 .read = seq_read,
575 .llseek = seq_lseek,
576 .release = single_release,
577 .write = traceSMB_proc_write,
578};
579
580static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
581{
582 seq_printf(m, "0x%x\n", global_secflags);
583 return 0;
584}
585
586static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
587{
588 return single_open(file, cifs_security_flags_proc_show, NULL);
589}
590
591
592
593
594
595
596static void
597cifs_security_flags_handle_must_flags(unsigned int *flags)
598{
599 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
600
601 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
602 *flags = CIFSSEC_MUST_KRB5;
603 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
604 *flags = CIFSSEC_MUST_NTLMSSP;
605 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
606 *flags = CIFSSEC_MUST_NTLMV2;
607 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
608 *flags = CIFSSEC_MUST_NTLM;
609 else if (CIFSSEC_MUST_LANMAN &&
610 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
611 *flags = CIFSSEC_MUST_LANMAN;
612 else if (CIFSSEC_MUST_PLNTXT &&
613 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
614 *flags = CIFSSEC_MUST_PLNTXT;
615
616 *flags |= signflags;
617}
618
619static ssize_t cifs_security_flags_proc_write(struct file *file,
620 const char __user *buffer, size_t count, loff_t *ppos)
621{
622 int rc;
623 unsigned int flags;
624 char flags_string[12];
625 char c;
626 bool bv;
627
628 if ((count < 1) || (count > 11))
629 return -EINVAL;
630
631 memset(flags_string, 0, 12);
632
633 if (copy_from_user(flags_string, buffer, count))
634 return -EFAULT;
635
636 if (count < 3) {
637
638 c = flags_string[0];
639 if (strtobool(&c, &bv) == 0) {
640 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
641 return count;
642 } else if (!isdigit(c)) {
643 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
644 flags_string);
645 return -EINVAL;
646 }
647 }
648
649
650 rc = kstrtouint(flags_string, 0, &flags);
651 if (rc) {
652 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
653 flags_string);
654 return rc;
655 }
656
657 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
658
659 if (flags == 0) {
660 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
661 return -EINVAL;
662 }
663
664 if (flags & ~CIFSSEC_MASK) {
665 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
666 flags & ~CIFSSEC_MASK);
667 return -EINVAL;
668 }
669
670 cifs_security_flags_handle_must_flags(&flags);
671
672
673 global_secflags = flags;
674 if (global_secflags & CIFSSEC_MUST_SIGN) {
675
676 global_secflags |= CIFSSEC_MAY_SIGN;
677 cifs_dbg(FYI, "packet signing now required\n");
678 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
679 cifs_dbg(FYI, "packet signing disabled\n");
680 }
681
682 return count;
683}
684
685static const struct file_operations cifs_security_flags_proc_fops = {
686 .owner = THIS_MODULE,
687 .open = cifs_security_flags_proc_open,
688 .read = seq_read,
689 .llseek = seq_lseek,
690 .release = single_release,
691 .write = cifs_security_flags_proc_write,
692};
693#else
694inline void cifs_proc_init(void)
695{
696}
697
698inline void cifs_proc_clean(void)
699{
700}
701#endif
702
