4 * Copyright (C) International Business Machines Corp., 2000,2005
6 * Modified by Steve French (sfrench@us.ibm.com)
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.
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.
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
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>
30 #include "cifsproto.h"
31 #include "cifs_debug.h"
35 cifs_dump_mem(char *label, void *data, int length)
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,
42 #ifdef CONFIG_CIFS_DEBUG
43 void cifs_vfs_err(const char *fmt, ...)
53 pr_err_ratelimited("CIFS VFS: %pV", &vaf);
59 void cifs_dump_detail(void *buf)
61 #ifdef CONFIG_CIFS_DEBUG2
62 struct smb_hdr *smb = (struct smb_hdr *)buf;
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 /* CONFIG_CIFS_DEBUG2 */
71 void cifs_dump_mids(struct TCP_Server_Info *server)
73 #ifdef CONFIG_CIFS_DEBUG2
74 struct list_head *tmp;
75 struct mid_q_entry *mid_entry;
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",
86 le16_to_cpu(mid_entry->command),
88 mid_entry->callback_data,
90 #ifdef CONFIG_CIFS_STATS2
91 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
94 mid_entry->when_received,
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);
105 spin_unlock(&GlobalMid_Lock);
106 #endif /* CONFIG_CIFS_DEBUG2 */
109 #ifdef CONFIG_PROC_FS
110 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
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;
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");
128 #ifdef CONFIG_CIFS_FSCACHE
129 seq_printf(m, ",FSCACHE");
131 #ifdef CONFIG_CIFS_SMB_DIRECT
132 seq_printf(m, ",SMB_DIRECT");
134 #ifdef CONFIG_CIFS_STATS2
135 seq_printf(m, ",STATS2");
136 #elif defined(CONFIG_CIFS_STATS)
137 seq_printf(m, ",STATS");
139 #ifdef CONFIG_CIFS_DEBUG2
140 seq_printf(m, ",DEBUG2");
141 #elif defined(CONFIG_CIFS_DEBUG)
142 seq_printf(m, ",DEBUG");
144 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
145 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
147 #ifdef CONFIG_CIFS_WEAK_PW_HASH
148 seq_printf(m, ",WEAK_PW_HASH");
150 #ifdef CONFIG_CIFS_POSIX
151 seq_printf(m, ",CIFS_POSIX");
153 #ifdef CONFIG_CIFS_UPCALL
154 seq_printf(m, ",UPCALL(SPNEGO)");
156 #ifdef CONFIG_CIFS_XATTR
157 seq_printf(m, ",XATTR");
159 #ifdef CONFIG_CIFS_ACL
160 seq_printf(m, ",ACL");
163 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
164 seq_printf(m, "Servers:");
167 spin_lock(&cifs_tcp_ses_lock);
168 list_for_each(tmp1, &cifs_tcp_ses_list) {
169 server = list_entry(tmp1, struct TCP_Server_Info,
171 seq_printf(m, "\nNumber of credits: %d", server->credits);
173 list_for_each(tmp2, &server->smb_ses_list) {
174 ses = list_entry(tmp2, struct cifs_ses,
176 if ((ses->serverDomain == NULL) ||
177 (ses->serverOS == NULL) ||
178 (ses->serverNOS == NULL)) {
179 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
180 i, ses->serverName, ses->ses_count,
181 ses->capabilities, ses->status);
182 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
183 seq_printf(m, "Guest\t");
184 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
185 seq_printf(m, "Anonymous\t");
188 "\n%d) Name: %s Domain: %s Uses: %d OS:"
189 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
190 " session status: %d\t",
191 i, ses->serverName, ses->serverDomain,
192 ses->ses_count, ses->serverOS, ses->serverNOS,
193 ses->capabilities, ses->status);
195 seq_printf(m, "TCP status: %d\n\tLocal Users To "
196 "Server: %d SecMode: 0x%x Req On Wire: %d",
197 server->tcpStatus, server->srv_count,
198 server->sec_mode, in_flight(server));
200 #ifdef CONFIG_CIFS_STATS2
201 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
202 atomic_read(&server->in_send),
203 atomic_read(&server->num_waiters));
206 seq_puts(m, "\n\tShares:");
208 list_for_each(tmp3, &ses->tcon_list) {
209 tcon = list_entry(tmp3, struct cifs_tcon,
212 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
213 seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
214 tcon->treeName, tcon->tc_count);
215 if (tcon->nativeFileSystem) {
216 seq_printf(m, "Type: %s ",
217 tcon->nativeFileSystem);
219 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
220 "\n\tPathComponentMax: %d Status: %d",
221 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
222 le32_to_cpu(tcon->fsAttrInfo.Attributes),
223 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
225 if (dev_type == FILE_DEVICE_DISK)
226 seq_puts(m, " type: DISK ");
227 else if (dev_type == FILE_DEVICE_CD_ROM)
228 seq_puts(m, " type: CDROM ");
230 seq_printf(m, " type: %d ", dev_type);
231 if (server->ops->dump_share_caps)
232 server->ops->dump_share_caps(m, tcon);
234 if (tcon->need_reconnect)
235 seq_puts(m, "\tDISCONNECTED ");
239 seq_puts(m, "\n\tMIDs:\n");
241 spin_lock(&GlobalMid_Lock);
242 list_for_each(tmp3, &server->pending_mid_q) {
243 mid_entry = list_entry(tmp3, struct mid_q_entry,
245 seq_printf(m, "\tState: %d com: %d pid:"
246 " %d cbdata: %p mid %llu\n",
247 mid_entry->mid_state,
248 le16_to_cpu(mid_entry->command),
250 mid_entry->callback_data,
253 spin_unlock(&GlobalMid_Lock);
256 spin_unlock(&cifs_tcp_ses_lock);
259 /* BB add code to dump additional info such as TCP session info now */
263 static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
265 return single_open(file, cifs_debug_data_proc_show, NULL);
268 static const struct file_operations cifs_debug_data_proc_fops = {
269 .open = cifs_debug_data_proc_open,
272 .release = single_release,
275 #ifdef CONFIG_CIFS_STATS
276 static ssize_t cifs_stats_proc_write(struct file *file,
277 const char __user *buffer, size_t count, loff_t *ppos)
281 struct list_head *tmp1, *tmp2, *tmp3;
282 struct TCP_Server_Info *server;
283 struct cifs_ses *ses;
284 struct cifs_tcon *tcon;
286 rc = kstrtobool_from_user(buffer, count, &bv);
288 #ifdef CONFIG_CIFS_STATS2
289 atomic_set(&totBufAllocCount, 0);
290 atomic_set(&totSmBufAllocCount, 0);
291 #endif /* CONFIG_CIFS_STATS2 */
292 atomic_set(&tcpSesReconnectCount, 0);
293 atomic_set(&tconInfoReconnectCount, 0);
295 spin_lock(&GlobalMid_Lock);
296 GlobalMaxActiveXid = 0;
297 GlobalCurrentXid = 0;
298 spin_unlock(&GlobalMid_Lock);
299 spin_lock(&cifs_tcp_ses_lock);
300 list_for_each(tmp1, &cifs_tcp_ses_list) {
301 server = list_entry(tmp1, struct TCP_Server_Info,
303 list_for_each(tmp2, &server->smb_ses_list) {
304 ses = list_entry(tmp2, struct cifs_ses,
306 list_for_each(tmp3, &ses->tcon_list) {
307 tcon = list_entry(tmp3,
310 atomic_set(&tcon->num_smbs_sent, 0);
311 spin_lock(&tcon->stat_lock);
312 tcon->bytes_read = 0;
313 tcon->bytes_written = 0;
314 spin_unlock(&tcon->stat_lock);
315 if (server->ops->clear_stats)
316 server->ops->clear_stats(tcon);
320 spin_unlock(&cifs_tcp_ses_lock);
328 static int cifs_stats_proc_show(struct seq_file *m, void *v)
331 struct list_head *tmp1, *tmp2, *tmp3;
332 struct TCP_Server_Info *server;
333 struct cifs_ses *ses;
334 struct cifs_tcon *tcon;
337 "Resources in use\nCIFS Session: %d\n",
338 sesInfoAllocCount.counter);
339 seq_printf(m, "Share (unique mount targets): %d\n",
340 tconInfoAllocCount.counter);
341 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
342 bufAllocCount.counter,
343 cifs_min_rcv + tcpSesAllocCount.counter);
344 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
345 smBufAllocCount.counter, cifs_min_small);
346 #ifdef CONFIG_CIFS_STATS2
347 seq_printf(m, "Total Large %d Small %d Allocations\n",
348 atomic_read(&totBufAllocCount),
349 atomic_read(&totSmBufAllocCount));
350 #endif /* CONFIG_CIFS_STATS2 */
352 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
354 "\n%d session %d share reconnects\n",
355 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
358 "Total vfs operations: %d maximum at one time: %d\n",
359 GlobalCurrentXid, GlobalMaxActiveXid);
362 spin_lock(&cifs_tcp_ses_lock);
363 list_for_each(tmp1, &cifs_tcp_ses_list) {
364 server = list_entry(tmp1, struct TCP_Server_Info,
366 list_for_each(tmp2, &server->smb_ses_list) {
367 ses = list_entry(tmp2, struct cifs_ses,
369 list_for_each(tmp3, &ses->tcon_list) {
370 tcon = list_entry(tmp3,
374 seq_printf(m, "\n%d) %s", i, tcon->treeName);
375 if (tcon->need_reconnect)
376 seq_puts(m, "\tDISCONNECTED ");
377 seq_printf(m, "\nSMBs: %d",
378 atomic_read(&tcon->num_smbs_sent));
379 if (server->ops->print_stats)
380 server->ops->print_stats(m, tcon);
384 spin_unlock(&cifs_tcp_ses_lock);
390 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
392 return single_open(file, cifs_stats_proc_show, NULL);
395 static const struct file_operations cifs_stats_proc_fops = {
396 .open = cifs_stats_proc_open,
399 .release = single_release,
400 .write = cifs_stats_proc_write,
404 static struct proc_dir_entry *proc_fs_cifs;
405 static const struct file_operations cifsFYI_proc_fops;
406 static const struct file_operations cifs_lookup_cache_proc_fops;
407 static const struct file_operations traceSMB_proc_fops;
408 static const struct file_operations cifs_security_flags_proc_fops;
409 static const struct file_operations cifs_linux_ext_proc_fops;
414 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
415 if (proc_fs_cifs == NULL)
418 proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
420 #ifdef CONFIG_CIFS_STATS
421 proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
423 proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
424 proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
425 proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
426 &cifs_linux_ext_proc_fops);
427 proc_create("SecurityFlags", 0, proc_fs_cifs,
428 &cifs_security_flags_proc_fops);
429 proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
430 &cifs_lookup_cache_proc_fops);
434 cifs_proc_clean(void)
436 if (proc_fs_cifs == NULL)
439 remove_proc_entry("DebugData", proc_fs_cifs);
440 remove_proc_entry("cifsFYI", proc_fs_cifs);
441 remove_proc_entry("traceSMB", proc_fs_cifs);
442 #ifdef CONFIG_CIFS_STATS
443 remove_proc_entry("Stats", proc_fs_cifs);
445 remove_proc_entry("SecurityFlags", proc_fs_cifs);
446 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
447 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
448 remove_proc_entry("fs/cifs", NULL);
451 static int cifsFYI_proc_show(struct seq_file *m, void *v)
453 seq_printf(m, "%d\n", cifsFYI);
457 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
459 return single_open(file, cifsFYI_proc_show, NULL);
462 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
463 size_t count, loff_t *ppos)
465 char c[2] = { '\0' };
469 rc = get_user(c[0], buffer);
472 if (strtobool(c, &bv) == 0)
474 else if ((c[0] > '1') && (c[0] <= '9'))
475 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
480 static const struct file_operations cifsFYI_proc_fops = {
481 .open = cifsFYI_proc_open,
484 .release = single_release,
485 .write = cifsFYI_proc_write,
488 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
490 seq_printf(m, "%d\n", linuxExtEnabled);
494 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
496 return single_open(file, cifs_linux_ext_proc_show, NULL);
499 static ssize_t cifs_linux_ext_proc_write(struct file *file,
500 const char __user *buffer, size_t count, loff_t *ppos)
504 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
511 static const struct file_operations cifs_linux_ext_proc_fops = {
512 .open = cifs_linux_ext_proc_open,
515 .release = single_release,
516 .write = cifs_linux_ext_proc_write,
519 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
521 seq_printf(m, "%d\n", lookupCacheEnabled);
525 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
527 return single_open(file, cifs_lookup_cache_proc_show, NULL);
530 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
531 const char __user *buffer, size_t count, loff_t *ppos)
535 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
542 static const struct file_operations cifs_lookup_cache_proc_fops = {
543 .open = cifs_lookup_cache_proc_open,
546 .release = single_release,
547 .write = cifs_lookup_cache_proc_write,
550 static int traceSMB_proc_show(struct seq_file *m, void *v)
552 seq_printf(m, "%d\n", traceSMB);
556 static int traceSMB_proc_open(struct inode *inode, struct file *file)
558 return single_open(file, traceSMB_proc_show, NULL);
561 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
562 size_t count, loff_t *ppos)
566 rc = kstrtobool_from_user(buffer, count, &traceSMB);
573 static const struct file_operations traceSMB_proc_fops = {
574 .open = traceSMB_proc_open,
577 .release = single_release,
578 .write = traceSMB_proc_write,
581 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
583 seq_printf(m, "0x%x\n", global_secflags);
587 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
589 return single_open(file, cifs_security_flags_proc_show, NULL);
593 * Ensure that if someone sets a MUST flag, that we disable all other MAY
594 * flags except for the ones corresponding to the given MUST flag. If there are
595 * multiple MUST flags, then try to prefer more secure ones.
598 cifs_security_flags_handle_must_flags(unsigned int *flags)
600 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
602 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
603 *flags = CIFSSEC_MUST_KRB5;
604 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
605 *flags = CIFSSEC_MUST_NTLMSSP;
606 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
607 *flags = CIFSSEC_MUST_NTLMV2;
608 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
609 *flags = CIFSSEC_MUST_NTLM;
610 else if (CIFSSEC_MUST_LANMAN &&
611 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
612 *flags = CIFSSEC_MUST_LANMAN;
613 else if (CIFSSEC_MUST_PLNTXT &&
614 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
615 *flags = CIFSSEC_MUST_PLNTXT;
620 static ssize_t cifs_security_flags_proc_write(struct file *file,
621 const char __user *buffer, size_t count, loff_t *ppos)
625 char flags_string[12];
628 if ((count < 1) || (count > 11))
631 memset(flags_string, 0, 12);
633 if (copy_from_user(flags_string, buffer, count))
637 /* single char or single char followed by null */
638 if (strtobool(flags_string, &bv) == 0) {
639 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
641 } else if (!isdigit(flags_string[0])) {
642 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
648 /* else we have a number */
649 rc = kstrtouint(flags_string, 0, &flags);
651 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
656 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
659 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
663 if (flags & ~CIFSSEC_MASK) {
664 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
665 flags & ~CIFSSEC_MASK);
669 cifs_security_flags_handle_must_flags(&flags);
671 /* flags look ok - update the global security flags for cifs module */
672 global_secflags = flags;
673 if (global_secflags & CIFSSEC_MUST_SIGN) {
674 /* requiring signing implies signing is allowed */
675 global_secflags |= CIFSSEC_MAY_SIGN;
676 cifs_dbg(FYI, "packet signing now required\n");
677 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
678 cifs_dbg(FYI, "packet signing disabled\n");
680 /* BB should we turn on MAY flags for other MUST options? */
684 static const struct file_operations cifs_security_flags_proc_fops = {
685 .open = cifs_security_flags_proc_open,
688 .release = single_release,
689 .write = cifs_security_flags_proc_write,
692 inline void cifs_proc_init(void)
696 inline void cifs_proc_clean(void)