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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_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 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 .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 bool bv;
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 = kstrtobool_from_user(buffer, count, &bv);
265 if (rc == 0) {
266#ifdef CONFIG_CIFS_STATS2
267 atomic_set(&totBufAllocCount, 0);
268 atomic_set(&totSmBufAllocCount, 0);
269#endif
270 spin_lock(&cifs_tcp_ses_lock);
271 list_for_each(tmp1, &cifs_tcp_ses_list) {
272 server = list_entry(tmp1, struct TCP_Server_Info,
273 tcp_ses_list);
274 list_for_each(tmp2, &server->smb_ses_list) {
275 ses = list_entry(tmp2, struct cifs_ses,
276 smb_ses_list);
277 list_for_each(tmp3, &ses->tcon_list) {
278 tcon = list_entry(tmp3,
279 struct cifs_tcon,
280 tcon_list);
281 atomic_set(&tcon->num_smbs_sent, 0);
282 if (server->ops->clear_stats)
283 server->ops->clear_stats(tcon);
284 }
285 }
286 }
287 spin_unlock(&cifs_tcp_ses_lock);
288 } else {
289 return rc;
290 }
291
292 return count;
293}
294
295static int cifs_stats_proc_show(struct seq_file *m, void *v)
296{
297 int i;
298 struct list_head *tmp1, *tmp2, *tmp3;
299 struct TCP_Server_Info *server;
300 struct cifs_ses *ses;
301 struct cifs_tcon *tcon;
302
303 seq_printf(m,
304 "Resources in use\nCIFS Session: %d\n",
305 sesInfoAllocCount.counter);
306 seq_printf(m, "Share (unique mount targets): %d\n",
307 tconInfoAllocCount.counter);
308 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
309 bufAllocCount.counter,
310 cifs_min_rcv + tcpSesAllocCount.counter);
311 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
312 smBufAllocCount.counter, cifs_min_small);
313#ifdef CONFIG_CIFS_STATS2
314 seq_printf(m, "Total Large %d Small %d Allocations\n",
315 atomic_read(&totBufAllocCount),
316 atomic_read(&totSmBufAllocCount));
317#endif
318
319 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
320 seq_printf(m,
321 "\n%d session %d share reconnects\n",
322 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
323
324 seq_printf(m,
325 "Total vfs operations: %d maximum at one time: %d\n",
326 GlobalCurrentXid, GlobalMaxActiveXid);
327
328 i = 0;
329 spin_lock(&cifs_tcp_ses_lock);
330 list_for_each(tmp1, &cifs_tcp_ses_list) {
331 server = list_entry(tmp1, struct TCP_Server_Info,
332 tcp_ses_list);
333 list_for_each(tmp2, &server->smb_ses_list) {
334 ses = list_entry(tmp2, struct cifs_ses,
335 smb_ses_list);
336 list_for_each(tmp3, &ses->tcon_list) {
337 tcon = list_entry(tmp3,
338 struct cifs_tcon,
339 tcon_list);
340 i++;
341 seq_printf(m, "\n%d) %s", i, tcon->treeName);
342 if (tcon->need_reconnect)
343 seq_puts(m, "\tDISCONNECTED ");
344 seq_printf(m, "\nSMBs: %d",
345 atomic_read(&tcon->num_smbs_sent));
346 if (server->ops->print_stats)
347 server->ops->print_stats(m, tcon);
348 }
349 }
350 }
351 spin_unlock(&cifs_tcp_ses_lock);
352
353 seq_putc(m, '\n');
354 return 0;
355}
356
357static int cifs_stats_proc_open(struct inode *inode, struct file *file)
358{
359 return single_open(file, cifs_stats_proc_show, NULL);
360}
361
362static const struct file_operations cifs_stats_proc_fops = {
363 .open = cifs_stats_proc_open,
364 .read = seq_read,
365 .llseek = seq_lseek,
366 .release = single_release,
367 .write = cifs_stats_proc_write,
368};
369#endif
370
371static struct proc_dir_entry *proc_fs_cifs;
372static const struct file_operations cifsFYI_proc_fops;
373static const struct file_operations cifs_lookup_cache_proc_fops;
374static const struct file_operations traceSMB_proc_fops;
375static const struct file_operations cifs_security_flags_proc_fops;
376static const struct file_operations cifs_linux_ext_proc_fops;
377
378void
379cifs_proc_init(void)
380{
381 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
382 if (proc_fs_cifs == NULL)
383 return;
384
385 proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
386
387#ifdef CONFIG_CIFS_STATS
388 proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
389#endif
390 proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
391 proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
392 proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
393 &cifs_linux_ext_proc_fops);
394 proc_create("SecurityFlags", 0, proc_fs_cifs,
395 &cifs_security_flags_proc_fops);
396 proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
397 &cifs_lookup_cache_proc_fops);
398}
399
400void
401cifs_proc_clean(void)
402{
403 if (proc_fs_cifs == NULL)
404 return;
405
406 remove_proc_entry("DebugData", proc_fs_cifs);
407 remove_proc_entry("cifsFYI", proc_fs_cifs);
408 remove_proc_entry("traceSMB", proc_fs_cifs);
409#ifdef CONFIG_CIFS_STATS
410 remove_proc_entry("Stats", proc_fs_cifs);
411#endif
412 remove_proc_entry("SecurityFlags", proc_fs_cifs);
413 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
414 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
415 remove_proc_entry("fs/cifs", NULL);
416}
417
418static int cifsFYI_proc_show(struct seq_file *m, void *v)
419{
420 seq_printf(m, "%d\n", cifsFYI);
421 return 0;
422}
423
424static int cifsFYI_proc_open(struct inode *inode, struct file *file)
425{
426 return single_open(file, cifsFYI_proc_show, NULL);
427}
428
429static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
430 size_t count, loff_t *ppos)
431{
432 char c[2] = { '\0' };
433 bool bv;
434 int rc;
435
436 rc = get_user(c[0], buffer);
437 if (rc)
438 return rc;
439 if (strtobool(c, &bv) == 0)
440 cifsFYI = bv;
441 else if ((c[0] > '1') && (c[0] <= '9'))
442 cifsFYI = (int) (c[0] - '0');
443
444 return count;
445}
446
447static const struct file_operations cifsFYI_proc_fops = {
448 .open = cifsFYI_proc_open,
449 .read = seq_read,
450 .llseek = seq_lseek,
451 .release = single_release,
452 .write = cifsFYI_proc_write,
453};
454
455static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
456{
457 seq_printf(m, "%d\n", linuxExtEnabled);
458 return 0;
459}
460
461static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
462{
463 return single_open(file, cifs_linux_ext_proc_show, NULL);
464}
465
466static ssize_t cifs_linux_ext_proc_write(struct file *file,
467 const char __user *buffer, size_t count, loff_t *ppos)
468{
469 int rc;
470
471 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
472 if (rc)
473 return rc;
474
475 return count;
476}
477
478static const struct file_operations cifs_linux_ext_proc_fops = {
479 .open = cifs_linux_ext_proc_open,
480 .read = seq_read,
481 .llseek = seq_lseek,
482 .release = single_release,
483 .write = cifs_linux_ext_proc_write,
484};
485
486static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
487{
488 seq_printf(m, "%d\n", lookupCacheEnabled);
489 return 0;
490}
491
492static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
493{
494 return single_open(file, cifs_lookup_cache_proc_show, NULL);
495}
496
497static ssize_t cifs_lookup_cache_proc_write(struct file *file,
498 const char __user *buffer, size_t count, loff_t *ppos)
499{
500 int rc;
501
502 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
503 if (rc)
504 return rc;
505
506 return count;
507}
508
509static const struct file_operations cifs_lookup_cache_proc_fops = {
510 .open = cifs_lookup_cache_proc_open,
511 .read = seq_read,
512 .llseek = seq_lseek,
513 .release = single_release,
514 .write = cifs_lookup_cache_proc_write,
515};
516
517static int traceSMB_proc_show(struct seq_file *m, void *v)
518{
519 seq_printf(m, "%d\n", traceSMB);
520 return 0;
521}
522
523static int traceSMB_proc_open(struct inode *inode, struct file *file)
524{
525 return single_open(file, traceSMB_proc_show, NULL);
526}
527
528static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
529 size_t count, loff_t *ppos)
530{
531 int rc;
532
533 rc = kstrtobool_from_user(buffer, count, &traceSMB);
534 if (rc)
535 return rc;
536
537 return count;
538}
539
540static const struct file_operations traceSMB_proc_fops = {
541 .open = traceSMB_proc_open,
542 .read = seq_read,
543 .llseek = seq_lseek,
544 .release = single_release,
545 .write = traceSMB_proc_write,
546};
547
548static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
549{
550 seq_printf(m, "0x%x\n", global_secflags);
551 return 0;
552}
553
554static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
555{
556 return single_open(file, cifs_security_flags_proc_show, NULL);
557}
558
559
560
561
562
563
564static void
565cifs_security_flags_handle_must_flags(unsigned int *flags)
566{
567 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
568
569 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
570 *flags = CIFSSEC_MUST_KRB5;
571 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
572 *flags = CIFSSEC_MUST_NTLMSSP;
573 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
574 *flags = CIFSSEC_MUST_NTLMV2;
575 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
576 *flags = CIFSSEC_MUST_NTLM;
577 else if (CIFSSEC_MUST_LANMAN &&
578 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
579 *flags = CIFSSEC_MUST_LANMAN;
580 else if (CIFSSEC_MUST_PLNTXT &&
581 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
582 *flags = CIFSSEC_MUST_PLNTXT;
583
584 *flags |= signflags;
585}
586
587static ssize_t cifs_security_flags_proc_write(struct file *file,
588 const char __user *buffer, size_t count, loff_t *ppos)
589{
590 int rc;
591 unsigned int flags;
592 char flags_string[12];
593 bool bv;
594
595 if ((count < 1) || (count > 11))
596 return -EINVAL;
597
598 memset(flags_string, 0, 12);
599
600 if (copy_from_user(flags_string, buffer, count))
601 return -EFAULT;
602
603 if (count < 3) {
604
605 if (strtobool(flags_string, &bv) == 0) {
606 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
607 return count;
608 } else if (!isdigit(flags_string[0])) {
609 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
610 flags_string);
611 return -EINVAL;
612 }
613 }
614
615
616 rc = kstrtouint(flags_string, 0, &flags);
617 if (rc) {
618 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
619 flags_string);
620 return rc;
621 }
622
623 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
624
625 if (flags == 0) {
626 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
627 return -EINVAL;
628 }
629
630 if (flags & ~CIFSSEC_MASK) {
631 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
632 flags & ~CIFSSEC_MASK);
633 return -EINVAL;
634 }
635
636 cifs_security_flags_handle_must_flags(&flags);
637
638
639 global_secflags = flags;
640 if (global_secflags & CIFSSEC_MUST_SIGN) {
641
642 global_secflags |= CIFSSEC_MAY_SIGN;
643 cifs_dbg(FYI, "packet signing now required\n");
644 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
645 cifs_dbg(FYI, "packet signing disabled\n");
646 }
647
648 return count;
649}
650
651static const struct file_operations cifs_security_flags_proc_fops = {
652 .open = cifs_security_flags_proc_open,
653 .read = seq_read,
654 .llseek = seq_lseek,
655 .release = single_release,
656 .write = cifs_security_flags_proc_write,
657};
658#else
659inline void cifs_proc_init(void)
660{
661}
662
663inline void cifs_proc_clean(void)
664{
665}
666#endif
667
