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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 | ||
34 | void | |
35 | cifs_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 | ||
60 | #ifdef CONFIG_CIFS_DEBUG | |
61 | void cifs_vfs_err(const char *fmt, ...) | |
62 | { | |
63 | struct va_format vaf; | |
64 | va_list args; | |
65 | ||
66 | va_start(args, fmt); | |
67 | ||
68 | vaf.fmt = fmt; | |
69 | vaf.va = &args; | |
70 | ||
71 | printk(KERN_ERR "CIFS VFS: %pV", &vaf); | |
72 | ||
73 | va_end(args); | |
74 | } | |
75 | #endif | |
76 | ||
77 | void cifs_dump_detail(void *buf) | |
78 | { | |
79 | #ifdef CONFIG_CIFS_DEBUG2 | |
80 | struct smb_hdr *smb = (struct smb_hdr *)buf; | |
81 | ||
82 | cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n", | |
83 | smb->Command, smb->Status.CifsError, | |
84 | smb->Flags, smb->Flags2, smb->Mid, smb->Pid); | |
85 | cifs_dbg(VFS, "smb buf %p len %u\n", smb, smbCalcSize(smb)); | |
86 | #endif /* CONFIG_CIFS_DEBUG2 */ | |
87 | } | |
88 | ||
89 | void cifs_dump_mids(struct TCP_Server_Info *server) | |
90 | { | |
91 | #ifdef CONFIG_CIFS_DEBUG2 | |
92 | struct list_head *tmp; | |
93 | struct mid_q_entry *mid_entry; | |
94 | ||
95 | if (server == NULL) | |
96 | return; | |
97 | ||
98 | cifs_dbg(VFS, "Dump pending requests:\n"); | |
99 | spin_lock(&GlobalMid_Lock); | |
100 | list_for_each(tmp, &server->pending_mid_q) { | |
101 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
102 | cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n", | |
103 | mid_entry->mid_state, | |
104 | le16_to_cpu(mid_entry->command), | |
105 | mid_entry->pid, | |
106 | mid_entry->callback_data, | |
107 | mid_entry->mid); | |
108 | #ifdef CONFIG_CIFS_STATS2 | |
109 | cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n", | |
110 | mid_entry->large_buf, | |
111 | mid_entry->resp_buf, | |
112 | mid_entry->when_received, | |
113 | jiffies); | |
114 | #endif /* STATS2 */ | |
115 | cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n", | |
116 | mid_entry->multiRsp, mid_entry->multiEnd); | |
117 | if (mid_entry->resp_buf) { | |
118 | cifs_dump_detail(mid_entry->resp_buf); | |
119 | cifs_dump_mem("existing buf: ", | |
120 | mid_entry->resp_buf, 62); | |
121 | } | |
122 | } | |
123 | spin_unlock(&GlobalMid_Lock); | |
124 | #endif /* CONFIG_CIFS_DEBUG2 */ | |
125 | } | |
126 | ||
127 | #ifdef CONFIG_PROC_FS | |
128 | static int cifs_debug_data_proc_show(struct seq_file *m, void *v) | |
129 | { | |
130 | struct list_head *tmp1, *tmp2, *tmp3; | |
131 | struct mid_q_entry *mid_entry; | |
132 | struct TCP_Server_Info *server; | |
133 | struct cifs_ses *ses; | |
134 | struct cifs_tcon *tcon; | |
135 | int i, j; | |
136 | __u32 dev_type; | |
137 | ||
138 | seq_puts(m, | |
139 | "Display Internal CIFS Data Structures for Debugging\n" | |
140 | "---------------------------------------------------\n"); | |
141 | seq_printf(m, "CIFS Version %s\n", CIFS_VERSION); | |
142 | seq_printf(m, "Features:"); | |
143 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
144 | seq_printf(m, " dfs"); | |
145 | #endif | |
146 | #ifdef CONFIG_CIFS_FSCACHE | |
147 | seq_printf(m, " fscache"); | |
148 | #endif | |
149 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
150 | seq_printf(m, " lanman"); | |
151 | #endif | |
152 | #ifdef CONFIG_CIFS_POSIX | |
153 | seq_printf(m, " posix"); | |
154 | #endif | |
155 | #ifdef CONFIG_CIFS_UPCALL | |
156 | seq_printf(m, " spnego"); | |
157 | #endif | |
158 | #ifdef CONFIG_CIFS_XATTR | |
159 | seq_printf(m, " xattr"); | |
160 | #endif | |
161 | #ifdef CONFIG_CIFS_ACL | |
162 | seq_printf(m, " acl"); | |
163 | #endif | |
164 | seq_putc(m, '\n'); | |
165 | seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); | |
166 | seq_printf(m, "Servers:"); | |
167 | ||
168 | i = 0; | |
169 | spin_lock(&cifs_tcp_ses_lock); | |
170 | list_for_each(tmp1, &cifs_tcp_ses_list) { | |
171 | server = list_entry(tmp1, struct TCP_Server_Info, | |
172 | tcp_ses_list); | |
173 | i++; | |
174 | list_for_each(tmp2, &server->smb_ses_list) { | |
175 | ses = list_entry(tmp2, struct cifs_ses, | |
176 | smb_ses_list); | |
177 | if ((ses->serverDomain == NULL) || | |
178 | (ses->serverOS == NULL) || | |
179 | (ses->serverNOS == NULL)) { | |
180 | seq_printf(m, "\n%d) entry for %s not fully " | |
181 | "displayed\n\t", i, ses->serverName); | |
182 | } else { | |
183 | seq_printf(m, | |
184 | "\n%d) Name: %s Domain: %s Uses: %d OS:" | |
185 | " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB" | |
186 | " session status: %d\t", | |
187 | i, ses->serverName, ses->serverDomain, | |
188 | ses->ses_count, ses->serverOS, ses->serverNOS, | |
189 | ses->capabilities, ses->status); | |
190 | } | |
191 | seq_printf(m, "TCP status: %d\n\tLocal Users To " | |
192 | "Server: %d SecMode: 0x%x Req On Wire: %d", | |
193 | server->tcpStatus, server->srv_count, | |
194 | server->sec_mode, in_flight(server)); | |
195 | ||
196 | #ifdef CONFIG_CIFS_STATS2 | |
197 | seq_printf(m, " In Send: %d In MaxReq Wait: %d", | |
198 | atomic_read(&server->in_send), | |
199 | atomic_read(&server->num_waiters)); | |
200 | #endif | |
201 | ||
202 | seq_puts(m, "\n\tShares:"); | |
203 | j = 0; | |
204 | list_for_each(tmp3, &ses->tcon_list) { | |
205 | tcon = list_entry(tmp3, struct cifs_tcon, | |
206 | tcon_list); | |
207 | ++j; | |
208 | dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); | |
209 | seq_printf(m, "\n\t%d) %s Mounts: %d ", j, | |
210 | tcon->treeName, tcon->tc_count); | |
211 | if (tcon->nativeFileSystem) { | |
212 | seq_printf(m, "Type: %s ", | |
213 | tcon->nativeFileSystem); | |
214 | } | |
215 | seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x" | |
216 | "\n\tPathComponentMax: %d Status: 0x%d", | |
217 | le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), | |
218 | le32_to_cpu(tcon->fsAttrInfo.Attributes), | |
219 | le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), | |
220 | tcon->tidStatus); | |
221 | if (dev_type == FILE_DEVICE_DISK) | |
222 | seq_puts(m, " type: DISK "); | |
223 | else if (dev_type == FILE_DEVICE_CD_ROM) | |
224 | seq_puts(m, " type: CDROM "); | |
225 | else | |
226 | seq_printf(m, " type: %d ", dev_type); | |
227 | if (server->ops->dump_share_caps) | |
228 | server->ops->dump_share_caps(m, tcon); | |
229 | ||
230 | if (tcon->need_reconnect) | |
231 | seq_puts(m, "\tDISCONNECTED "); | |
232 | seq_putc(m, '\n'); | |
233 | } | |
234 | ||
235 | seq_puts(m, "\n\tMIDs:\n"); | |
236 | ||
237 | spin_lock(&GlobalMid_Lock); | |
238 | list_for_each(tmp3, &server->pending_mid_q) { | |
239 | mid_entry = list_entry(tmp3, struct mid_q_entry, | |
240 | qhead); | |
241 | seq_printf(m, "\tState: %d com: %d pid:" | |
242 | " %d cbdata: %p mid %llu\n", | |
243 | mid_entry->mid_state, | |
244 | le16_to_cpu(mid_entry->command), | |
245 | mid_entry->pid, | |
246 | mid_entry->callback_data, | |
247 | mid_entry->mid); | |
248 | } | |
249 | spin_unlock(&GlobalMid_Lock); | |
250 | } | |
251 | } | |
252 | spin_unlock(&cifs_tcp_ses_lock); | |
253 | seq_putc(m, '\n'); | |
254 | ||
255 | /* BB add code to dump additional info such as TCP session info now */ | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static int cifs_debug_data_proc_open(struct inode *inode, struct file *file) | |
260 | { | |
261 | return single_open(file, cifs_debug_data_proc_show, NULL); | |
262 | } | |
263 | ||
264 | static const struct file_operations cifs_debug_data_proc_fops = { | |
265 | .owner = THIS_MODULE, | |
266 | .open = cifs_debug_data_proc_open, | |
267 | .read = seq_read, | |
268 | .llseek = seq_lseek, | |
269 | .release = single_release, | |
270 | }; | |
271 | ||
272 | #ifdef CONFIG_CIFS_STATS | |
273 | static ssize_t cifs_stats_proc_write(struct file *file, | |
274 | const char __user *buffer, size_t count, loff_t *ppos) | |
275 | { | |
276 | char c; | |
277 | int rc; | |
278 | struct list_head *tmp1, *tmp2, *tmp3; | |
279 | struct TCP_Server_Info *server; | |
280 | struct cifs_ses *ses; | |
281 | struct cifs_tcon *tcon; | |
282 | ||
283 | rc = get_user(c, buffer); | |
284 | if (rc) | |
285 | return rc; | |
286 | ||
287 | if (c == '1' || c == 'y' || c == 'Y' || c == '0') { | |
288 | #ifdef CONFIG_CIFS_STATS2 | |
289 | atomic_set(&totBufAllocCount, 0); | |
290 | atomic_set(&totSmBufAllocCount, 0); | |
291 | #endif /* CONFIG_CIFS_STATS2 */ | |
292 | spin_lock(&cifs_tcp_ses_lock); | |
293 | list_for_each(tmp1, &cifs_tcp_ses_list) { | |
294 | server = list_entry(tmp1, struct TCP_Server_Info, | |
295 | tcp_ses_list); | |
296 | list_for_each(tmp2, &server->smb_ses_list) { | |
297 | ses = list_entry(tmp2, struct cifs_ses, | |
298 | smb_ses_list); | |
299 | list_for_each(tmp3, &ses->tcon_list) { | |
300 | tcon = list_entry(tmp3, | |
301 | struct cifs_tcon, | |
302 | tcon_list); | |
303 | atomic_set(&tcon->num_smbs_sent, 0); | |
304 | if (server->ops->clear_stats) | |
305 | server->ops->clear_stats(tcon); | |
306 | } | |
307 | } | |
308 | } | |
309 | spin_unlock(&cifs_tcp_ses_lock); | |
310 | } | |
311 | ||
312 | return count; | |
313 | } | |
314 | ||
315 | static int cifs_stats_proc_show(struct seq_file *m, void *v) | |
316 | { | |
317 | int i; | |
318 | struct list_head *tmp1, *tmp2, *tmp3; | |
319 | struct TCP_Server_Info *server; | |
320 | struct cifs_ses *ses; | |
321 | struct cifs_tcon *tcon; | |
322 | ||
323 | seq_printf(m, | |
324 | "Resources in use\nCIFS Session: %d\n", | |
325 | sesInfoAllocCount.counter); | |
326 | seq_printf(m, "Share (unique mount targets): %d\n", | |
327 | tconInfoAllocCount.counter); | |
328 | seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n", | |
329 | bufAllocCount.counter, | |
330 | cifs_min_rcv + tcpSesAllocCount.counter); | |
331 | seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", | |
332 | smBufAllocCount.counter, cifs_min_small); | |
333 | #ifdef CONFIG_CIFS_STATS2 | |
334 | seq_printf(m, "Total Large %d Small %d Allocations\n", | |
335 | atomic_read(&totBufAllocCount), | |
336 | atomic_read(&totSmBufAllocCount)); | |
337 | #endif /* CONFIG_CIFS_STATS2 */ | |
338 | ||
339 | seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount)); | |
340 | seq_printf(m, | |
341 | "\n%d session %d share reconnects\n", | |
342 | tcpSesReconnectCount.counter, tconInfoReconnectCount.counter); | |
343 | ||
344 | seq_printf(m, | |
345 | "Total vfs operations: %d maximum at one time: %d\n", | |
346 | GlobalCurrentXid, GlobalMaxActiveXid); | |
347 | ||
348 | i = 0; | |
349 | spin_lock(&cifs_tcp_ses_lock); | |
350 | list_for_each(tmp1, &cifs_tcp_ses_list) { | |
351 | server = list_entry(tmp1, struct TCP_Server_Info, | |
352 | tcp_ses_list); | |
353 | list_for_each(tmp2, &server->smb_ses_list) { | |
354 | ses = list_entry(tmp2, struct cifs_ses, | |
355 | smb_ses_list); | |
356 | list_for_each(tmp3, &ses->tcon_list) { | |
357 | tcon = list_entry(tmp3, | |
358 | struct cifs_tcon, | |
359 | tcon_list); | |
360 | i++; | |
361 | seq_printf(m, "\n%d) %s", i, tcon->treeName); | |
362 | if (tcon->need_reconnect) | |
363 | seq_puts(m, "\tDISCONNECTED "); | |
364 | seq_printf(m, "\nSMBs: %d", | |
365 | atomic_read(&tcon->num_smbs_sent)); | |
366 | if (server->ops->print_stats) | |
367 | server->ops->print_stats(m, tcon); | |
368 | } | |
369 | } | |
370 | } | |
371 | spin_unlock(&cifs_tcp_ses_lock); | |
372 | ||
373 | seq_putc(m, '\n'); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | static int cifs_stats_proc_open(struct inode *inode, struct file *file) | |
378 | { | |
379 | return single_open(file, cifs_stats_proc_show, NULL); | |
380 | } | |
381 | ||
382 | static const struct file_operations cifs_stats_proc_fops = { | |
383 | .owner = THIS_MODULE, | |
384 | .open = cifs_stats_proc_open, | |
385 | .read = seq_read, | |
386 | .llseek = seq_lseek, | |
387 | .release = single_release, | |
388 | .write = cifs_stats_proc_write, | |
389 | }; | |
390 | #endif /* STATS */ | |
391 | ||
392 | static struct proc_dir_entry *proc_fs_cifs; | |
393 | static const struct file_operations cifsFYI_proc_fops; | |
394 | static const struct file_operations cifs_lookup_cache_proc_fops; | |
395 | static const struct file_operations traceSMB_proc_fops; | |
396 | static const struct file_operations cifs_security_flags_proc_fops; | |
397 | static const struct file_operations cifs_linux_ext_proc_fops; | |
398 | ||
399 | void | |
400 | cifs_proc_init(void) | |
401 | { | |
402 | proc_fs_cifs = proc_mkdir("fs/cifs", NULL); | |
403 | if (proc_fs_cifs == NULL) | |
404 | return; | |
405 | ||
406 | proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops); | |
407 | ||
408 | #ifdef CONFIG_CIFS_STATS | |
409 | proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops); | |
410 | #endif /* STATS */ | |
411 | proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops); | |
412 | proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops); | |
413 | proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs, | |
414 | &cifs_linux_ext_proc_fops); | |
415 | proc_create("SecurityFlags", 0, proc_fs_cifs, | |
416 | &cifs_security_flags_proc_fops); | |
417 | proc_create("LookupCacheEnabled", 0, proc_fs_cifs, | |
418 | &cifs_lookup_cache_proc_fops); | |
419 | } | |
420 | ||
421 | void | |
422 | cifs_proc_clean(void) | |
423 | { | |
424 | if (proc_fs_cifs == NULL) | |
425 | return; | |
426 | ||
427 | remove_proc_entry("DebugData", proc_fs_cifs); | |
428 | remove_proc_entry("cifsFYI", proc_fs_cifs); | |
429 | remove_proc_entry("traceSMB", proc_fs_cifs); | |
430 | #ifdef CONFIG_CIFS_STATS | |
431 | remove_proc_entry("Stats", proc_fs_cifs); | |
432 | #endif | |
433 | remove_proc_entry("SecurityFlags", proc_fs_cifs); | |
434 | remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs); | |
435 | remove_proc_entry("LookupCacheEnabled", proc_fs_cifs); | |
436 | remove_proc_entry("fs/cifs", NULL); | |
437 | } | |
438 | ||
439 | static int cifsFYI_proc_show(struct seq_file *m, void *v) | |
440 | { | |
441 | seq_printf(m, "%d\n", cifsFYI); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | static int cifsFYI_proc_open(struct inode *inode, struct file *file) | |
446 | { | |
447 | return single_open(file, cifsFYI_proc_show, NULL); | |
448 | } | |
449 | ||
450 | static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, | |
451 | size_t count, loff_t *ppos) | |
452 | { | |
453 | char c; | |
454 | int rc; | |
455 | ||
456 | rc = get_user(c, buffer); | |
457 | if (rc) | |
458 | return rc; | |
459 | if (c == '0' || c == 'n' || c == 'N') | |
460 | cifsFYI = 0; | |
461 | else if (c == '1' || c == 'y' || c == 'Y') | |
462 | cifsFYI = 1; | |
463 | else if ((c > '1') && (c <= '9')) | |
464 | cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */ | |
465 | ||
466 | return count; | |
467 | } | |
468 | ||
469 | static const struct file_operations cifsFYI_proc_fops = { | |
470 | .owner = THIS_MODULE, | |
471 | .open = cifsFYI_proc_open, | |
472 | .read = seq_read, | |
473 | .llseek = seq_lseek, | |
474 | .release = single_release, | |
475 | .write = cifsFYI_proc_write, | |
476 | }; | |
477 | ||
478 | static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) | |
479 | { | |
480 | seq_printf(m, "%d\n", linuxExtEnabled); | |
481 | return 0; | |
482 | } | |
483 | ||
484 | static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) | |
485 | { | |
486 | return single_open(file, cifs_linux_ext_proc_show, NULL); | |
487 | } | |
488 | ||
489 | static ssize_t cifs_linux_ext_proc_write(struct file *file, | |
490 | const char __user *buffer, size_t count, loff_t *ppos) | |
491 | { | |
492 | char c; | |
493 | int rc; | |
494 | ||
495 | rc = get_user(c, buffer); | |
496 | if (rc) | |
497 | return rc; | |
498 | if (c == '0' || c == 'n' || c == 'N') | |
499 | linuxExtEnabled = 0; | |
500 | else if (c == '1' || c == 'y' || c == 'Y') | |
501 | linuxExtEnabled = 1; | |
502 | ||
503 | return count; | |
504 | } | |
505 | ||
506 | static const struct file_operations cifs_linux_ext_proc_fops = { | |
507 | .owner = THIS_MODULE, | |
508 | .open = cifs_linux_ext_proc_open, | |
509 | .read = seq_read, | |
510 | .llseek = seq_lseek, | |
511 | .release = single_release, | |
512 | .write = cifs_linux_ext_proc_write, | |
513 | }; | |
514 | ||
515 | static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) | |
516 | { | |
517 | seq_printf(m, "%d\n", lookupCacheEnabled); | |
518 | return 0; | |
519 | } | |
520 | ||
521 | static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) | |
522 | { | |
523 | return single_open(file, cifs_lookup_cache_proc_show, NULL); | |
524 | } | |
525 | ||
526 | static ssize_t cifs_lookup_cache_proc_write(struct file *file, | |
527 | const char __user *buffer, size_t count, loff_t *ppos) | |
528 | { | |
529 | char c; | |
530 | int rc; | |
531 | ||
532 | rc = get_user(c, buffer); | |
533 | if (rc) | |
534 | return rc; | |
535 | if (c == '0' || c == 'n' || c == 'N') | |
536 | lookupCacheEnabled = 0; | |
537 | else if (c == '1' || c == 'y' || c == 'Y') | |
538 | lookupCacheEnabled = 1; | |
539 | ||
540 | return count; | |
541 | } | |
542 | ||
543 | static const struct file_operations cifs_lookup_cache_proc_fops = { | |
544 | .owner = THIS_MODULE, | |
545 | .open = cifs_lookup_cache_proc_open, | |
546 | .read = seq_read, | |
547 | .llseek = seq_lseek, | |
548 | .release = single_release, | |
549 | .write = cifs_lookup_cache_proc_write, | |
550 | }; | |
551 | ||
552 | static int traceSMB_proc_show(struct seq_file *m, void *v) | |
553 | { | |
554 | seq_printf(m, "%d\n", traceSMB); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | static int traceSMB_proc_open(struct inode *inode, struct file *file) | |
559 | { | |
560 | return single_open(file, traceSMB_proc_show, NULL); | |
561 | } | |
562 | ||
563 | static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, | |
564 | size_t count, loff_t *ppos) | |
565 | { | |
566 | char c; | |
567 | int rc; | |
568 | ||
569 | rc = get_user(c, buffer); | |
570 | if (rc) | |
571 | return rc; | |
572 | if (c == '0' || c == 'n' || c == 'N') | |
573 | traceSMB = 0; | |
574 | else if (c == '1' || c == 'y' || c == 'Y') | |
575 | traceSMB = 1; | |
576 | ||
577 | return count; | |
578 | } | |
579 | ||
580 | static const struct file_operations traceSMB_proc_fops = { | |
581 | .owner = THIS_MODULE, | |
582 | .open = traceSMB_proc_open, | |
583 | .read = seq_read, | |
584 | .llseek = seq_lseek, | |
585 | .release = single_release, | |
586 | .write = traceSMB_proc_write, | |
587 | }; | |
588 | ||
589 | static int cifs_security_flags_proc_show(struct seq_file *m, void *v) | |
590 | { | |
591 | seq_printf(m, "0x%x\n", global_secflags); | |
592 | return 0; | |
593 | } | |
594 | ||
595 | static int cifs_security_flags_proc_open(struct inode *inode, struct file *file) | |
596 | { | |
597 | return single_open(file, cifs_security_flags_proc_show, NULL); | |
598 | } | |
599 | ||
600 | /* | |
601 | * Ensure that if someone sets a MUST flag, that we disable all other MAY | |
602 | * flags except for the ones corresponding to the given MUST flag. If there are | |
603 | * multiple MUST flags, then try to prefer more secure ones. | |
604 | */ | |
605 | static void | |
606 | cifs_security_flags_handle_must_flags(unsigned int *flags) | |
607 | { | |
608 | unsigned int signflags = *flags & CIFSSEC_MUST_SIGN; | |
609 | ||
610 | if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) | |
611 | *flags = CIFSSEC_MUST_KRB5; | |
612 | else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) | |
613 | *flags = CIFSSEC_MUST_NTLMSSP; | |
614 | else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) | |
615 | *flags = CIFSSEC_MUST_NTLMV2; | |
616 | else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM) | |
617 | *flags = CIFSSEC_MUST_NTLM; | |
618 | else if ((*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN) | |
619 | *flags = CIFSSEC_MUST_LANMAN; | |
620 | else if ((*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT) | |
621 | *flags = CIFSSEC_MUST_PLNTXT; | |
622 | ||
623 | *flags |= signflags; | |
624 | } | |
625 | ||
626 | static ssize_t cifs_security_flags_proc_write(struct file *file, | |
627 | const char __user *buffer, size_t count, loff_t *ppos) | |
628 | { | |
629 | int rc; | |
630 | unsigned int flags; | |
631 | char flags_string[12]; | |
632 | char c; | |
633 | ||
634 | if ((count < 1) || (count > 11)) | |
635 | return -EINVAL; | |
636 | ||
637 | memset(flags_string, 0, 12); | |
638 | ||
639 | if (copy_from_user(flags_string, buffer, count)) | |
640 | return -EFAULT; | |
641 | ||
642 | if (count < 3) { | |
643 | /* single char or single char followed by null */ | |
644 | c = flags_string[0]; | |
645 | if (c == '0' || c == 'n' || c == 'N') { | |
646 | global_secflags = CIFSSEC_DEF; /* default */ | |
647 | return count; | |
648 | } else if (c == '1' || c == 'y' || c == 'Y') { | |
649 | global_secflags = CIFSSEC_MAX; | |
650 | return count; | |
651 | } else if (!isdigit(c)) { | |
652 | cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", | |
653 | flags_string); | |
654 | return -EINVAL; | |
655 | } | |
656 | } | |
657 | ||
658 | /* else we have a number */ | |
659 | rc = kstrtouint(flags_string, 0, &flags); | |
660 | if (rc) { | |
661 | cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", | |
662 | flags_string); | |
663 | return rc; | |
664 | } | |
665 | ||
666 | cifs_dbg(FYI, "sec flags 0x%x\n", flags); | |
667 | ||
668 | if (flags == 0) { | |
669 | cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); | |
670 | return -EINVAL; | |
671 | } | |
672 | ||
673 | if (flags & ~CIFSSEC_MASK) { | |
674 | cifs_dbg(VFS, "Unsupported security flags: 0x%x\n", | |
675 | flags & ~CIFSSEC_MASK); | |
676 | return -EINVAL; | |
677 | } | |
678 | ||
679 | cifs_security_flags_handle_must_flags(&flags); | |
680 | ||
681 | /* flags look ok - update the global security flags for cifs module */ | |
682 | global_secflags = flags; | |
683 | if (global_secflags & CIFSSEC_MUST_SIGN) { | |
684 | /* requiring signing implies signing is allowed */ | |
685 | global_secflags |= CIFSSEC_MAY_SIGN; | |
686 | cifs_dbg(FYI, "packet signing now required\n"); | |
687 | } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) { | |
688 | cifs_dbg(FYI, "packet signing disabled\n"); | |
689 | } | |
690 | /* BB should we turn on MAY flags for other MUST options? */ | |
691 | return count; | |
692 | } | |
693 | ||
694 | static const struct file_operations cifs_security_flags_proc_fops = { | |
695 | .owner = THIS_MODULE, | |
696 | .open = cifs_security_flags_proc_open, | |
697 | .read = seq_read, | |
698 | .llseek = seq_lseek, | |
699 | .release = single_release, | |
700 | .write = cifs_security_flags_proc_write, | |
701 | }; | |
702 | #else | |
703 | inline void cifs_proc_init(void) | |
704 | { | |
705 | } | |
706 | ||
707 | inline void cifs_proc_clean(void) | |
708 | { | |
709 | } | |
710 | #endif /* PROC_FS */ |