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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 <linux/uaccess.h>
28#include "cifspdu.h"
29#include "cifsglob.h"
30#include "cifsproto.h"
31#include "cifs_debug.h"
32#include "cifsfs.h"
33
34void
35cifs_dump_mem(char *label, void *data, int length)
36{
37 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
38 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
39 data, length, true);
40}
41
42#ifdef CONFIG_CIFS_DEBUG
43void cifs_vfs_err(const char *fmt, ...)
44{
45 struct va_format vaf;
46 va_list args;
47
48 va_start(args, fmt);
49
50 vaf.fmt = fmt;
51 vaf.va = &args;
52
53 pr_err_ratelimited("CIFS VFS: %pV", &vaf);
54
55 va_end(args);
56}
57#endif
58
59void cifs_dump_detail(void *buf)
60{
61#ifdef CONFIG_CIFS_DEBUG2
62 struct smb_hdr *smb = (struct smb_hdr *)buf;
63
64 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
65 smb->Command, smb->Status.CifsError,
66 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
67 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smbCalcSize(smb));
68#endif
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 seq_printf(m, "\nNumber of credits: %d", server->credits);
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) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
164 i, ses->serverName, ses->ses_count,
165 ses->capabilities, ses->status);
166 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
167 seq_printf(m, "Guest\t");
168 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
169 seq_printf(m, "Anonymous\t");
170 } else {
171 seq_printf(m,
172 "\n%d) Name: %s Domain: %s Uses: %d OS:"
173 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
174 " session status: %d\t",
175 i, ses->serverName, ses->serverDomain,
176 ses->ses_count, ses->serverOS, ses->serverNOS,
177 ses->capabilities, ses->status);
178 }
179 seq_printf(m, "TCP status: %d\n\tLocal Users To "
180 "Server: %d SecMode: 0x%x Req On Wire: %d",
181 server->tcpStatus, server->srv_count,
182 server->sec_mode, in_flight(server));
183
184#ifdef CONFIG_CIFS_STATS2
185 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
186 atomic_read(&server->in_send),
187 atomic_read(&server->num_waiters));
188#endif
189
190 seq_puts(m, "\n\tShares:");
191 j = 0;
192 list_for_each(tmp3, &ses->tcon_list) {
193 tcon = list_entry(tmp3, struct cifs_tcon,
194 tcon_list);
195 ++j;
196 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
197 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
198 tcon->treeName, tcon->tc_count);
199 if (tcon->nativeFileSystem) {
200 seq_printf(m, "Type: %s ",
201 tcon->nativeFileSystem);
202 }
203 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
204 "\n\tPathComponentMax: %d Status: %d",
205 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
206 le32_to_cpu(tcon->fsAttrInfo.Attributes),
207 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
208 tcon->tidStatus);
209 if (dev_type == FILE_DEVICE_DISK)
210 seq_puts(m, " type: DISK ");
211 else if (dev_type == FILE_DEVICE_CD_ROM)
212 seq_puts(m, " type: CDROM ");
213 else
214 seq_printf(m, " type: %d ", dev_type);
215 if (server->ops->dump_share_caps)
216 server->ops->dump_share_caps(m, tcon);
217
218 if (tcon->need_reconnect)
219 seq_puts(m, "\tDISCONNECTED ");
220 seq_putc(m, '\n');
221 }
222
223 seq_puts(m, "\n\tMIDs:\n");
224
225 spin_lock(&GlobalMid_Lock);
226 list_for_each(tmp3, &server->pending_mid_q) {
227 mid_entry = list_entry(tmp3, struct mid_q_entry,
228 qhead);
229 seq_printf(m, "\tState: %d com: %d pid:"
230 " %d cbdata: %p mid %llu\n",
231 mid_entry->mid_state,
232 le16_to_cpu(mid_entry->command),
233 mid_entry->pid,
234 mid_entry->callback_data,
235 mid_entry->mid);
236 }
237 spin_unlock(&GlobalMid_Lock);
238 }
239 }
240 spin_unlock(&cifs_tcp_ses_lock);
241 seq_putc(m, '\n');
242
243
244 return 0;
245}
246
247static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
248{
249 return single_open(file, cifs_debug_data_proc_show, NULL);
250}
251
252static const struct file_operations cifs_debug_data_proc_fops = {
253 .open = cifs_debug_data_proc_open,
254 .read = seq_read,
255 .llseek = seq_lseek,
256 .release = single_release,
257};
258
259#ifdef CONFIG_CIFS_STATS
260static ssize_t cifs_stats_proc_write(struct file *file,
261 const char __user *buffer, size_t count, loff_t *ppos)
262{
263 bool bv;
264 int rc;
265 struct list_head *tmp1, *tmp2, *tmp3;
266 struct TCP_Server_Info *server;
267 struct cifs_ses *ses;
268 struct cifs_tcon *tcon;
269
270 rc = kstrtobool_from_user(buffer, count, &bv);
271 if (rc == 0) {
272#ifdef CONFIG_CIFS_STATS2
273 atomic_set(&totBufAllocCount, 0);
274 atomic_set(&totSmBufAllocCount, 0);
275#endif
276 spin_lock(&cifs_tcp_ses_lock);
277 list_for_each(tmp1, &cifs_tcp_ses_list) {
278 server = list_entry(tmp1, struct TCP_Server_Info,
279 tcp_ses_list);
280 list_for_each(tmp2, &server->smb_ses_list) {
281 ses = list_entry(tmp2, struct cifs_ses,
282 smb_ses_list);
283 list_for_each(tmp3, &ses->tcon_list) {
284 tcon = list_entry(tmp3,
285 struct cifs_tcon,
286 tcon_list);
287 atomic_set(&tcon->num_smbs_sent, 0);
288 if (server->ops->clear_stats)
289 server->ops->clear_stats(tcon);
290 }
291 }
292 }
293 spin_unlock(&cifs_tcp_ses_lock);
294 } else {
295 return rc;
296 }
297
298 return count;
299}
300
301static int cifs_stats_proc_show(struct seq_file *m, void *v)
302{
303 int i;
304 struct list_head *tmp1, *tmp2, *tmp3;
305 struct TCP_Server_Info *server;
306 struct cifs_ses *ses;
307 struct cifs_tcon *tcon;
308
309 seq_printf(m,
310 "Resources in use\nCIFS Session: %d\n",
311 sesInfoAllocCount.counter);
312 seq_printf(m, "Share (unique mount targets): %d\n",
313 tconInfoAllocCount.counter);
314 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
315 bufAllocCount.counter,
316 cifs_min_rcv + tcpSesAllocCount.counter);
317 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
318 smBufAllocCount.counter, cifs_min_small);
319#ifdef CONFIG_CIFS_STATS2
320 seq_printf(m, "Total Large %d Small %d Allocations\n",
321 atomic_read(&totBufAllocCount),
322 atomic_read(&totSmBufAllocCount));
323#endif
324
325 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
326 seq_printf(m,
327 "\n%d session %d share reconnects\n",
328 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
329
330 seq_printf(m,
331 "Total vfs operations: %d maximum at one time: %d\n",
332 GlobalCurrentXid, GlobalMaxActiveXid);
333
334 i = 0;
335 spin_lock(&cifs_tcp_ses_lock);
336 list_for_each(tmp1, &cifs_tcp_ses_list) {
337 server = list_entry(tmp1, struct TCP_Server_Info,
338 tcp_ses_list);
339 list_for_each(tmp2, &server->smb_ses_list) {
340 ses = list_entry(tmp2, struct cifs_ses,
341 smb_ses_list);
342 list_for_each(tmp3, &ses->tcon_list) {
343 tcon = list_entry(tmp3,
344 struct cifs_tcon,
345 tcon_list);
346 i++;
347 seq_printf(m, "\n%d) %s", i, tcon->treeName);
348 if (tcon->need_reconnect)
349 seq_puts(m, "\tDISCONNECTED ");
350 seq_printf(m, "\nSMBs: %d",
351 atomic_read(&tcon->num_smbs_sent));
352 if (server->ops->print_stats)
353 server->ops->print_stats(m, tcon);
354 }
355 }
356 }
357 spin_unlock(&cifs_tcp_ses_lock);
358
359 seq_putc(m, '\n');
360 return 0;
361}
362
363static int cifs_stats_proc_open(struct inode *inode, struct file *file)
364{
365 return single_open(file, cifs_stats_proc_show, NULL);
366}
367
368static const struct file_operations cifs_stats_proc_fops = {
369 .open = cifs_stats_proc_open,
370 .read = seq_read,
371 .llseek = seq_lseek,
372 .release = single_release,
373 .write = cifs_stats_proc_write,
374};
375#endif
376
377static struct proc_dir_entry *proc_fs_cifs;
378static const struct file_operations cifsFYI_proc_fops;
379static const struct file_operations cifs_lookup_cache_proc_fops;
380static const struct file_operations traceSMB_proc_fops;
381static const struct file_operations cifs_security_flags_proc_fops;
382static const struct file_operations cifs_linux_ext_proc_fops;
383
384void
385cifs_proc_init(void)
386{
387 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
388 if (proc_fs_cifs == NULL)
389 return;
390
391 proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
392
393#ifdef CONFIG_CIFS_STATS
394 proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
395#endif
396 proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
397 proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
398 proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
399 &cifs_linux_ext_proc_fops);
400 proc_create("SecurityFlags", 0, proc_fs_cifs,
401 &cifs_security_flags_proc_fops);
402 proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
403 &cifs_lookup_cache_proc_fops);
404}
405
406void
407cifs_proc_clean(void)
408{
409 if (proc_fs_cifs == NULL)
410 return;
411
412 remove_proc_entry("DebugData", proc_fs_cifs);
413 remove_proc_entry("cifsFYI", proc_fs_cifs);
414 remove_proc_entry("traceSMB", proc_fs_cifs);
415#ifdef CONFIG_CIFS_STATS
416 remove_proc_entry("Stats", proc_fs_cifs);
417#endif
418 remove_proc_entry("SecurityFlags", proc_fs_cifs);
419 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
420 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
421 remove_proc_entry("fs/cifs", NULL);
422}
423
424static int cifsFYI_proc_show(struct seq_file *m, void *v)
425{
426 seq_printf(m, "%d\n", cifsFYI);
427 return 0;
428}
429
430static int cifsFYI_proc_open(struct inode *inode, struct file *file)
431{
432 return single_open(file, cifsFYI_proc_show, NULL);
433}
434
435static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
436 size_t count, loff_t *ppos)
437{
438 char c[2] = { '\0' };
439 bool bv;
440 int rc;
441
442 rc = get_user(c[0], buffer);
443 if (rc)
444 return rc;
445 if (strtobool(c, &bv) == 0)
446 cifsFYI = bv;
447 else if ((c[0] > '1') && (c[0] <= '9'))
448 cifsFYI = (int) (c[0] - '0');
449
450 return count;
451}
452
453static const struct file_operations cifsFYI_proc_fops = {
454 .open = cifsFYI_proc_open,
455 .read = seq_read,
456 .llseek = seq_lseek,
457 .release = single_release,
458 .write = cifsFYI_proc_write,
459};
460
461static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
462{
463 seq_printf(m, "%d\n", linuxExtEnabled);
464 return 0;
465}
466
467static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
468{
469 return single_open(file, cifs_linux_ext_proc_show, NULL);
470}
471
472static ssize_t cifs_linux_ext_proc_write(struct file *file,
473 const char __user *buffer, size_t count, loff_t *ppos)
474{
475 int rc;
476
477 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
478 if (rc)
479 return rc;
480
481 return count;
482}
483
484static const struct file_operations cifs_linux_ext_proc_fops = {
485 .open = cifs_linux_ext_proc_open,
486 .read = seq_read,
487 .llseek = seq_lseek,
488 .release = single_release,
489 .write = cifs_linux_ext_proc_write,
490};
491
492static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
493{
494 seq_printf(m, "%d\n", lookupCacheEnabled);
495 return 0;
496}
497
498static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
499{
500 return single_open(file, cifs_lookup_cache_proc_show, NULL);
501}
502
503static ssize_t cifs_lookup_cache_proc_write(struct file *file,
504 const char __user *buffer, size_t count, loff_t *ppos)
505{
506 int rc;
507
508 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
509 if (rc)
510 return rc;
511
512 return count;
513}
514
515static const struct file_operations cifs_lookup_cache_proc_fops = {
516 .open = cifs_lookup_cache_proc_open,
517 .read = seq_read,
518 .llseek = seq_lseek,
519 .release = single_release,
520 .write = cifs_lookup_cache_proc_write,
521};
522
523static int traceSMB_proc_show(struct seq_file *m, void *v)
524{
525 seq_printf(m, "%d\n", traceSMB);
526 return 0;
527}
528
529static int traceSMB_proc_open(struct inode *inode, struct file *file)
530{
531 return single_open(file, traceSMB_proc_show, NULL);
532}
533
534static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
535 size_t count, loff_t *ppos)
536{
537 int rc;
538
539 rc = kstrtobool_from_user(buffer, count, &traceSMB);
540 if (rc)
541 return rc;
542
543 return count;
544}
545
546static const struct file_operations traceSMB_proc_fops = {
547 .open = traceSMB_proc_open,
548 .read = seq_read,
549 .llseek = seq_lseek,
550 .release = single_release,
551 .write = traceSMB_proc_write,
552};
553
554static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
555{
556 seq_printf(m, "0x%x\n", global_secflags);
557 return 0;
558}
559
560static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
561{
562 return single_open(file, cifs_security_flags_proc_show, NULL);
563}
564
565
566
567
568
569
570static void
571cifs_security_flags_handle_must_flags(unsigned int *flags)
572{
573 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
574
575 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
576 *flags = CIFSSEC_MUST_KRB5;
577 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
578 *flags = CIFSSEC_MUST_NTLMSSP;
579 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
580 *flags = CIFSSEC_MUST_NTLMV2;
581 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
582 *flags = CIFSSEC_MUST_NTLM;
583 else if (CIFSSEC_MUST_LANMAN &&
584 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
585 *flags = CIFSSEC_MUST_LANMAN;
586 else if (CIFSSEC_MUST_PLNTXT &&
587 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
588 *flags = CIFSSEC_MUST_PLNTXT;
589
590 *flags |= signflags;
591}
592
593static ssize_t cifs_security_flags_proc_write(struct file *file,
594 const char __user *buffer, size_t count, loff_t *ppos)
595{
596 int rc;
597 unsigned int flags;
598 char flags_string[12];
599 bool bv;
600
601 if ((count < 1) || (count > 11))
602 return -EINVAL;
603
604 memset(flags_string, 0, 12);
605
606 if (copy_from_user(flags_string, buffer, count))
607 return -EFAULT;
608
609 if (count < 3) {
610
611 if (strtobool(flags_string, &bv) == 0) {
612 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
613 return count;
614 } else if (!isdigit(flags_string[0])) {
615 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
616 flags_string);
617 return -EINVAL;
618 }
619 }
620
621
622 rc = kstrtouint(flags_string, 0, &flags);
623 if (rc) {
624 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
625 flags_string);
626 return rc;
627 }
628
629 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
630
631 if (flags == 0) {
632 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
633 return -EINVAL;
634 }
635
636 if (flags & ~CIFSSEC_MASK) {
637 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
638 flags & ~CIFSSEC_MASK);
639 return -EINVAL;
640 }
641
642 cifs_security_flags_handle_must_flags(&flags);
643
644
645 global_secflags = flags;
646 if (global_secflags & CIFSSEC_MUST_SIGN) {
647
648 global_secflags |= CIFSSEC_MAY_SIGN;
649 cifs_dbg(FYI, "packet signing now required\n");
650 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
651 cifs_dbg(FYI, "packet signing disabled\n");
652 }
653
654 return count;
655}
656
657static const struct file_operations cifs_security_flags_proc_fops = {
658 .open = cifs_security_flags_proc_open,
659 .read = seq_read,
660 .llseek = seq_lseek,
661 .release = single_release,
662 .write = cifs_security_flags_proc_write,
663};
664#else
665inline void cifs_proc_init(void)
666{
667}
668
669inline void cifs_proc_clean(void)
670{
671}
672#endif
673
