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 <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 #ifdef CONFIG_CIFS_SMB_DIRECT
34 #include "smbdirect.h"
35 #endif
36
37 void
cifs_dump_mem(char * label,void * data,int length)38 cifs_dump_mem(char *label, void *data, int length)
39 {
40 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
41 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
42 data, length, true);
43 }
44
cifs_dump_detail(void * buf,struct TCP_Server_Info * server)45 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
46 {
47 #ifdef CONFIG_CIFS_DEBUG2
48 struct smb_hdr *smb = (struct smb_hdr *)buf;
49
50 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
51 smb->Command, smb->Status.CifsError,
52 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
53 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
54 server->ops->calc_smb_size(smb, server));
55 #endif /* CONFIG_CIFS_DEBUG2 */
56 }
57
cifs_dump_mids(struct TCP_Server_Info * server)58 void cifs_dump_mids(struct TCP_Server_Info *server)
59 {
60 #ifdef CONFIG_CIFS_DEBUG2
61 struct list_head *tmp;
62 struct mid_q_entry *mid_entry;
63
64 if (server == NULL)
65 return;
66
67 cifs_dbg(VFS, "Dump pending requests:\n");
68 spin_lock(&GlobalMid_Lock);
69 list_for_each(tmp, &server->pending_mid_q) {
70 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
71 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
72 mid_entry->mid_state,
73 le16_to_cpu(mid_entry->command),
74 mid_entry->pid,
75 mid_entry->callback_data,
76 mid_entry->mid);
77 #ifdef CONFIG_CIFS_STATS2
78 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
79 mid_entry->large_buf,
80 mid_entry->resp_buf,
81 mid_entry->when_received,
82 jiffies);
83 #endif /* STATS2 */
84 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
85 mid_entry->multiRsp, mid_entry->multiEnd);
86 if (mid_entry->resp_buf) {
87 cifs_dump_detail(mid_entry->resp_buf, server);
88 cifs_dump_mem("existing buf: ",
89 mid_entry->resp_buf, 62);
90 }
91 }
92 spin_unlock(&GlobalMid_Lock);
93 #endif /* CONFIG_CIFS_DEBUG2 */
94 }
95
96 #ifdef CONFIG_PROC_FS
cifs_debug_tcon(struct seq_file * m,struct cifs_tcon * tcon)97 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
98 {
99 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
100
101 seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
102 if (tcon->nativeFileSystem)
103 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
104 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
105 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
106 le32_to_cpu(tcon->fsAttrInfo.Attributes),
107 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
108 tcon->tidStatus);
109 if (dev_type == FILE_DEVICE_DISK)
110 seq_puts(m, " type: DISK ");
111 else if (dev_type == FILE_DEVICE_CD_ROM)
112 seq_puts(m, " type: CDROM ");
113 else
114 seq_printf(m, " type: %d ", dev_type);
115 if (tcon->seal)
116 seq_printf(m, " Encrypted");
117 if (tcon->nocase)
118 seq_printf(m, " nocase");
119 if (tcon->unix_ext)
120 seq_printf(m, " POSIX Extensions");
121 if (tcon->ses->server->ops->dump_share_caps)
122 tcon->ses->server->ops->dump_share_caps(m, tcon);
123
124 if (tcon->need_reconnect)
125 seq_puts(m, "\tDISCONNECTED ");
126 seq_putc(m, '\n');
127 }
128
129 static void
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)130 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
131 {
132 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
133 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
134
135 seq_printf(m, "\t\tSpeed: %zu bps\n", iface->speed);
136 seq_puts(m, "\t\tCapabilities: ");
137 if (iface->rdma_capable)
138 seq_puts(m, "rdma ");
139 if (iface->rss_capable)
140 seq_puts(m, "rss ");
141 seq_putc(m, '\n');
142 if (iface->sockaddr.ss_family == AF_INET)
143 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
144 else if (iface->sockaddr.ss_family == AF_INET6)
145 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
146 }
147
cifs_debug_data_proc_show(struct seq_file * m,void * v)148 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
149 {
150 struct list_head *tmp1, *tmp2, *tmp3;
151 struct mid_q_entry *mid_entry;
152 struct TCP_Server_Info *server;
153 struct cifs_ses *ses;
154 struct cifs_tcon *tcon;
155 int i, j;
156
157 seq_puts(m,
158 "Display Internal CIFS Data Structures for Debugging\n"
159 "---------------------------------------------------\n");
160 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
161 seq_printf(m, "Features:");
162 #ifdef CONFIG_CIFS_DFS_UPCALL
163 seq_printf(m, " DFS");
164 #endif
165 #ifdef CONFIG_CIFS_FSCACHE
166 seq_printf(m, ",FSCACHE");
167 #endif
168 #ifdef CONFIG_CIFS_SMB_DIRECT
169 seq_printf(m, ",SMB_DIRECT");
170 #endif
171 #ifdef CONFIG_CIFS_STATS2
172 seq_printf(m, ",STATS2");
173 #else
174 seq_printf(m, ",STATS");
175 #endif
176 #ifdef CONFIG_CIFS_DEBUG2
177 seq_printf(m, ",DEBUG2");
178 #elif defined(CONFIG_CIFS_DEBUG)
179 seq_printf(m, ",DEBUG");
180 #endif
181 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
182 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
183 #endif
184 #ifdef CONFIG_CIFS_WEAK_PW_HASH
185 seq_printf(m, ",WEAK_PW_HASH");
186 #endif
187 #ifdef CONFIG_CIFS_POSIX
188 seq_printf(m, ",CIFS_POSIX");
189 #endif
190 #ifdef CONFIG_CIFS_UPCALL
191 seq_printf(m, ",UPCALL(SPNEGO)");
192 #endif
193 #ifdef CONFIG_CIFS_XATTR
194 seq_printf(m, ",XATTR");
195 #endif
196 #ifdef CONFIG_CIFS_ACL
197 seq_printf(m, ",ACL");
198 #endif
199 seq_putc(m, '\n');
200 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
201 seq_printf(m, "Servers:");
202
203 i = 0;
204 spin_lock(&cifs_tcp_ses_lock);
205 list_for_each(tmp1, &cifs_tcp_ses_list) {
206 server = list_entry(tmp1, struct TCP_Server_Info,
207 tcp_ses_list);
208
209 #ifdef CONFIG_CIFS_SMB_DIRECT
210 if (!server->rdma)
211 goto skip_rdma;
212
213 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
214 "transport status: %x",
215 server->smbd_conn->protocol,
216 server->smbd_conn->transport_status);
217 seq_printf(m, "\nConn receive_credit_max: %x "
218 "send_credit_target: %x max_send_size: %x",
219 server->smbd_conn->receive_credit_max,
220 server->smbd_conn->send_credit_target,
221 server->smbd_conn->max_send_size);
222 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
223 "max_fragmented_send_size: %x max_receive_size:%x",
224 server->smbd_conn->max_fragmented_recv_size,
225 server->smbd_conn->max_fragmented_send_size,
226 server->smbd_conn->max_receive_size);
227 seq_printf(m, "\nConn keep_alive_interval: %x "
228 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
229 server->smbd_conn->keep_alive_interval,
230 server->smbd_conn->max_readwrite_size,
231 server->smbd_conn->rdma_readwrite_threshold);
232 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
233 "count_put_receive_buffer: %x count_send_empty: %x",
234 server->smbd_conn->count_get_receive_buffer,
235 server->smbd_conn->count_put_receive_buffer,
236 server->smbd_conn->count_send_empty);
237 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
238 "count_enqueue_reassembly_queue: %x "
239 "count_dequeue_reassembly_queue: %x "
240 "fragment_reassembly_remaining: %x "
241 "reassembly_data_length: %x "
242 "reassembly_queue_length: %x",
243 server->smbd_conn->count_reassembly_queue,
244 server->smbd_conn->count_enqueue_reassembly_queue,
245 server->smbd_conn->count_dequeue_reassembly_queue,
246 server->smbd_conn->fragment_reassembly_remaining,
247 server->smbd_conn->reassembly_data_length,
248 server->smbd_conn->reassembly_queue_length);
249 seq_printf(m, "\nCurrent Credits send_credits: %x "
250 "receive_credits: %x receive_credit_target: %x",
251 atomic_read(&server->smbd_conn->send_credits),
252 atomic_read(&server->smbd_conn->receive_credits),
253 server->smbd_conn->receive_credit_target);
254 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
255 " %x smbd_send_pending: %x smbd_recv_pending: %x",
256 atomic_read(&server->smbd_conn->send_pending),
257 atomic_read(&server->smbd_conn->send_payload_pending),
258 server->smbd_conn->smbd_send_pending,
259 server->smbd_conn->smbd_recv_pending);
260 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
261 "count_empty_packet_queue: %x",
262 server->smbd_conn->count_receive_queue,
263 server->smbd_conn->count_empty_packet_queue);
264 seq_printf(m, "\nMR responder_resources: %x "
265 "max_frmr_depth: %x mr_type: %x",
266 server->smbd_conn->responder_resources,
267 server->smbd_conn->max_frmr_depth,
268 server->smbd_conn->mr_type);
269 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
270 atomic_read(&server->smbd_conn->mr_ready_count),
271 atomic_read(&server->smbd_conn->mr_used_count));
272 skip_rdma:
273 #endif
274 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
275 server->credits, server->dialect);
276 if (server->sign)
277 seq_printf(m, " signed");
278 if (server->posix_ext_supported)
279 seq_printf(m, " posix");
280
281 i++;
282 list_for_each(tmp2, &server->smb_ses_list) {
283 ses = list_entry(tmp2, struct cifs_ses,
284 smb_ses_list);
285 if ((ses->serverDomain == NULL) ||
286 (ses->serverOS == NULL) ||
287 (ses->serverNOS == NULL)) {
288 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t",
289 i, ses->serverName, ses->ses_count,
290 ses->capabilities, ses->status);
291 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
292 seq_printf(m, "Guest\t");
293 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
294 seq_printf(m, "Anonymous\t");
295 } else {
296 seq_printf(m,
297 "\n%d) Name: %s Domain: %s Uses: %d OS:"
298 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
299 " session status: %d\t",
300 i, ses->serverName, ses->serverDomain,
301 ses->ses_count, ses->serverOS, ses->serverNOS,
302 ses->capabilities, ses->status);
303 }
304 if (server->rdma)
305 seq_printf(m, "RDMA\n\t");
306 seq_printf(m, "TCP status: %d\n\tLocal Users To "
307 "Server: %d SecMode: 0x%x Req On Wire: %d",
308 server->tcpStatus, server->srv_count,
309 server->sec_mode, in_flight(server));
310
311 #ifdef CONFIG_CIFS_STATS2
312 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
313 atomic_read(&server->in_send),
314 atomic_read(&server->num_waiters));
315 #endif
316
317 seq_puts(m, "\n\tShares:");
318 j = 0;
319
320 seq_printf(m, "\n\t%d) IPC: ", j);
321 if (ses->tcon_ipc)
322 cifs_debug_tcon(m, ses->tcon_ipc);
323 else
324 seq_puts(m, "none\n");
325
326 list_for_each(tmp3, &ses->tcon_list) {
327 tcon = list_entry(tmp3, struct cifs_tcon,
328 tcon_list);
329 ++j;
330 seq_printf(m, "\n\t%d) ", j);
331 cifs_debug_tcon(m, tcon);
332 }
333
334 seq_puts(m, "\n\tMIDs:\n");
335
336 spin_lock(&GlobalMid_Lock);
337 list_for_each(tmp3, &server->pending_mid_q) {
338 mid_entry = list_entry(tmp3, struct mid_q_entry,
339 qhead);
340 seq_printf(m, "\tState: %d com: %d pid:"
341 " %d cbdata: %p mid %llu\n",
342 mid_entry->mid_state,
343 le16_to_cpu(mid_entry->command),
344 mid_entry->pid,
345 mid_entry->callback_data,
346 mid_entry->mid);
347 }
348 spin_unlock(&GlobalMid_Lock);
349
350 spin_lock(&ses->iface_lock);
351 if (ses->iface_count)
352 seq_printf(m, "\n\tServer interfaces: %zu\n",
353 ses->iface_count);
354 for (j = 0; j < ses->iface_count; j++) {
355 seq_printf(m, "\t%d)\n", j);
356 cifs_dump_iface(m, &ses->iface_list[j]);
357 }
358 spin_unlock(&ses->iface_lock);
359 }
360 }
361 spin_unlock(&cifs_tcp_ses_lock);
362 seq_putc(m, '\n');
363
364 /* BB add code to dump additional info such as TCP session info now */
365 return 0;
366 }
367
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)368 static ssize_t cifs_stats_proc_write(struct file *file,
369 const char __user *buffer, size_t count, loff_t *ppos)
370 {
371 bool bv;
372 int rc;
373 struct list_head *tmp1, *tmp2, *tmp3;
374 struct TCP_Server_Info *server;
375 struct cifs_ses *ses;
376 struct cifs_tcon *tcon;
377
378 rc = kstrtobool_from_user(buffer, count, &bv);
379 if (rc == 0) {
380 #ifdef CONFIG_CIFS_STATS2
381 int i;
382
383 atomic_set(&totBufAllocCount, 0);
384 atomic_set(&totSmBufAllocCount, 0);
385 #endif /* CONFIG_CIFS_STATS2 */
386 spin_lock(&GlobalMid_Lock);
387 GlobalMaxActiveXid = 0;
388 GlobalCurrentXid = 0;
389 spin_unlock(&GlobalMid_Lock);
390 spin_lock(&cifs_tcp_ses_lock);
391 list_for_each(tmp1, &cifs_tcp_ses_list) {
392 server = list_entry(tmp1, struct TCP_Server_Info,
393 tcp_ses_list);
394 #ifdef CONFIG_CIFS_STATS2
395 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
396 atomic_set(&server->smb2slowcmd[i], 0);
397 #endif /* CONFIG_CIFS_STATS2 */
398 list_for_each(tmp2, &server->smb_ses_list) {
399 ses = list_entry(tmp2, struct cifs_ses,
400 smb_ses_list);
401 list_for_each(tmp3, &ses->tcon_list) {
402 tcon = list_entry(tmp3,
403 struct cifs_tcon,
404 tcon_list);
405 atomic_set(&tcon->num_smbs_sent, 0);
406 spin_lock(&tcon->stat_lock);
407 tcon->bytes_read = 0;
408 tcon->bytes_written = 0;
409 spin_unlock(&tcon->stat_lock);
410 if (server->ops->clear_stats)
411 server->ops->clear_stats(tcon);
412 }
413 }
414 }
415 spin_unlock(&cifs_tcp_ses_lock);
416 } else {
417 return rc;
418 }
419
420 return count;
421 }
422
cifs_stats_proc_show(struct seq_file * m,void * v)423 static int cifs_stats_proc_show(struct seq_file *m, void *v)
424 {
425 int i;
426 #ifdef CONFIG_CIFS_STATS2
427 int j;
428 #endif /* STATS2 */
429 struct list_head *tmp1, *tmp2, *tmp3;
430 struct TCP_Server_Info *server;
431 struct cifs_ses *ses;
432 struct cifs_tcon *tcon;
433
434 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
435 sesInfoAllocCount.counter);
436 seq_printf(m, "Share (unique mount targets): %d\n",
437 tconInfoAllocCount.counter);
438 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
439 bufAllocCount.counter,
440 cifs_min_rcv + tcpSesAllocCount.counter);
441 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
442 smBufAllocCount.counter, cifs_min_small);
443 #ifdef CONFIG_CIFS_STATS2
444 seq_printf(m, "Total Large %d Small %d Allocations\n",
445 atomic_read(&totBufAllocCount),
446 atomic_read(&totSmBufAllocCount));
447 #endif /* CONFIG_CIFS_STATS2 */
448
449 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
450 seq_printf(m,
451 "\n%d session %d share reconnects\n",
452 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
453
454 seq_printf(m,
455 "Total vfs operations: %d maximum at one time: %d\n",
456 GlobalCurrentXid, GlobalMaxActiveXid);
457
458 i = 0;
459 spin_lock(&cifs_tcp_ses_lock);
460 list_for_each(tmp1, &cifs_tcp_ses_list) {
461 server = list_entry(tmp1, struct TCP_Server_Info,
462 tcp_ses_list);
463 #ifdef CONFIG_CIFS_STATS2
464 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
465 if (atomic_read(&server->smb2slowcmd[j]))
466 seq_printf(m, "%d slow responses from %s for command %d\n",
467 atomic_read(&server->smb2slowcmd[j]),
468 server->hostname, j);
469 #endif /* STATS2 */
470 list_for_each(tmp2, &server->smb_ses_list) {
471 ses = list_entry(tmp2, struct cifs_ses,
472 smb_ses_list);
473 list_for_each(tmp3, &ses->tcon_list) {
474 tcon = list_entry(tmp3,
475 struct cifs_tcon,
476 tcon_list);
477 i++;
478 seq_printf(m, "\n%d) %s", i, tcon->treeName);
479 if (tcon->need_reconnect)
480 seq_puts(m, "\tDISCONNECTED ");
481 seq_printf(m, "\nSMBs: %d",
482 atomic_read(&tcon->num_smbs_sent));
483 if (server->ops->print_stats)
484 server->ops->print_stats(m, tcon);
485 }
486 }
487 }
488 spin_unlock(&cifs_tcp_ses_lock);
489
490 seq_putc(m, '\n');
491 return 0;
492 }
493
cifs_stats_proc_open(struct inode * inode,struct file * file)494 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
495 {
496 return single_open(file, cifs_stats_proc_show, NULL);
497 }
498
499 static const struct file_operations cifs_stats_proc_fops = {
500 .open = cifs_stats_proc_open,
501 .read = seq_read,
502 .llseek = seq_lseek,
503 .release = single_release,
504 .write = cifs_stats_proc_write,
505 };
506
507 #ifdef CONFIG_CIFS_SMB_DIRECT
508 #define PROC_FILE_DEFINE(name) \
509 static ssize_t name##_write(struct file *file, const char __user *buffer, \
510 size_t count, loff_t *ppos) \
511 { \
512 int rc; \
513 rc = kstrtoint_from_user(buffer, count, 10, & name); \
514 if (rc) \
515 return rc; \
516 return count; \
517 } \
518 static int name##_proc_show(struct seq_file *m, void *v) \
519 { \
520 seq_printf(m, "%d\n", name ); \
521 return 0; \
522 } \
523 static int name##_open(struct inode *inode, struct file *file) \
524 { \
525 return single_open(file, name##_proc_show, NULL); \
526 } \
527 \
528 static const struct file_operations cifs_##name##_proc_fops = { \
529 .open = name##_open, \
530 .read = seq_read, \
531 .llseek = seq_lseek, \
532 .release = single_release, \
533 .write = name##_write, \
534 }
535
536 PROC_FILE_DEFINE(rdma_readwrite_threshold);
537 PROC_FILE_DEFINE(smbd_max_frmr_depth);
538 PROC_FILE_DEFINE(smbd_keep_alive_interval);
539 PROC_FILE_DEFINE(smbd_max_receive_size);
540 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
541 PROC_FILE_DEFINE(smbd_max_send_size);
542 PROC_FILE_DEFINE(smbd_send_credit_target);
543 PROC_FILE_DEFINE(smbd_receive_credit_max);
544 #endif
545
546 static struct proc_dir_entry *proc_fs_cifs;
547 static const struct file_operations cifsFYI_proc_fops;
548 static const struct file_operations cifs_lookup_cache_proc_fops;
549 static const struct file_operations traceSMB_proc_fops;
550 static const struct file_operations cifs_security_flags_proc_fops;
551 static const struct file_operations cifs_linux_ext_proc_fops;
552
553 void
cifs_proc_init(void)554 cifs_proc_init(void)
555 {
556 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
557 if (proc_fs_cifs == NULL)
558 return;
559
560 proc_create_single("DebugData", 0, proc_fs_cifs,
561 cifs_debug_data_proc_show);
562
563 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
564 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
565 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
566 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
567 &cifs_linux_ext_proc_fops);
568 proc_create("SecurityFlags", 0644, proc_fs_cifs,
569 &cifs_security_flags_proc_fops);
570 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
571 &cifs_lookup_cache_proc_fops);
572 #ifdef CONFIG_CIFS_SMB_DIRECT
573 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
574 &cifs_rdma_readwrite_threshold_proc_fops);
575 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
576 &cifs_smbd_max_frmr_depth_proc_fops);
577 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
578 &cifs_smbd_keep_alive_interval_proc_fops);
579 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
580 &cifs_smbd_max_receive_size_proc_fops);
581 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
582 &cifs_smbd_max_fragmented_recv_size_proc_fops);
583 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
584 &cifs_smbd_max_send_size_proc_fops);
585 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
586 &cifs_smbd_send_credit_target_proc_fops);
587 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
588 &cifs_smbd_receive_credit_max_proc_fops);
589 #endif
590 }
591
592 void
cifs_proc_clean(void)593 cifs_proc_clean(void)
594 {
595 if (proc_fs_cifs == NULL)
596 return;
597
598 remove_proc_entry("DebugData", proc_fs_cifs);
599 remove_proc_entry("cifsFYI", proc_fs_cifs);
600 remove_proc_entry("traceSMB", proc_fs_cifs);
601 remove_proc_entry("Stats", proc_fs_cifs);
602 remove_proc_entry("SecurityFlags", proc_fs_cifs);
603 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
604 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
605 #ifdef CONFIG_CIFS_SMB_DIRECT
606 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
607 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
608 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
609 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
610 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
611 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
612 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
613 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
614 #endif
615 remove_proc_entry("fs/cifs", NULL);
616 }
617
cifsFYI_proc_show(struct seq_file * m,void * v)618 static int cifsFYI_proc_show(struct seq_file *m, void *v)
619 {
620 seq_printf(m, "%d\n", cifsFYI);
621 return 0;
622 }
623
cifsFYI_proc_open(struct inode * inode,struct file * file)624 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
625 {
626 return single_open(file, cifsFYI_proc_show, NULL);
627 }
628
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)629 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
630 size_t count, loff_t *ppos)
631 {
632 char c[2] = { '\0' };
633 bool bv;
634 int rc;
635
636 rc = get_user(c[0], buffer);
637 if (rc)
638 return rc;
639 if (strtobool(c, &bv) == 0)
640 cifsFYI = bv;
641 else if ((c[0] > '1') && (c[0] <= '9'))
642 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
643 else
644 return -EINVAL;
645
646 return count;
647 }
648
649 static const struct file_operations cifsFYI_proc_fops = {
650 .open = cifsFYI_proc_open,
651 .read = seq_read,
652 .llseek = seq_lseek,
653 .release = single_release,
654 .write = cifsFYI_proc_write,
655 };
656
cifs_linux_ext_proc_show(struct seq_file * m,void * v)657 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
658 {
659 seq_printf(m, "%d\n", linuxExtEnabled);
660 return 0;
661 }
662
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)663 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
664 {
665 return single_open(file, cifs_linux_ext_proc_show, NULL);
666 }
667
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)668 static ssize_t cifs_linux_ext_proc_write(struct file *file,
669 const char __user *buffer, size_t count, loff_t *ppos)
670 {
671 int rc;
672
673 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
674 if (rc)
675 return rc;
676
677 return count;
678 }
679
680 static const struct file_operations cifs_linux_ext_proc_fops = {
681 .open = cifs_linux_ext_proc_open,
682 .read = seq_read,
683 .llseek = seq_lseek,
684 .release = single_release,
685 .write = cifs_linux_ext_proc_write,
686 };
687
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)688 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
689 {
690 seq_printf(m, "%d\n", lookupCacheEnabled);
691 return 0;
692 }
693
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)694 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
695 {
696 return single_open(file, cifs_lookup_cache_proc_show, NULL);
697 }
698
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)699 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
700 const char __user *buffer, size_t count, loff_t *ppos)
701 {
702 int rc;
703
704 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
705 if (rc)
706 return rc;
707
708 return count;
709 }
710
711 static const struct file_operations cifs_lookup_cache_proc_fops = {
712 .open = cifs_lookup_cache_proc_open,
713 .read = seq_read,
714 .llseek = seq_lseek,
715 .release = single_release,
716 .write = cifs_lookup_cache_proc_write,
717 };
718
traceSMB_proc_show(struct seq_file * m,void * v)719 static int traceSMB_proc_show(struct seq_file *m, void *v)
720 {
721 seq_printf(m, "%d\n", traceSMB);
722 return 0;
723 }
724
traceSMB_proc_open(struct inode * inode,struct file * file)725 static int traceSMB_proc_open(struct inode *inode, struct file *file)
726 {
727 return single_open(file, traceSMB_proc_show, NULL);
728 }
729
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)730 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
731 size_t count, loff_t *ppos)
732 {
733 int rc;
734
735 rc = kstrtobool_from_user(buffer, count, &traceSMB);
736 if (rc)
737 return rc;
738
739 return count;
740 }
741
742 static const struct file_operations traceSMB_proc_fops = {
743 .open = traceSMB_proc_open,
744 .read = seq_read,
745 .llseek = seq_lseek,
746 .release = single_release,
747 .write = traceSMB_proc_write,
748 };
749
cifs_security_flags_proc_show(struct seq_file * m,void * v)750 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
751 {
752 seq_printf(m, "0x%x\n", global_secflags);
753 return 0;
754 }
755
cifs_security_flags_proc_open(struct inode * inode,struct file * file)756 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
757 {
758 return single_open(file, cifs_security_flags_proc_show, NULL);
759 }
760
761 /*
762 * Ensure that if someone sets a MUST flag, that we disable all other MAY
763 * flags except for the ones corresponding to the given MUST flag. If there are
764 * multiple MUST flags, then try to prefer more secure ones.
765 */
766 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)767 cifs_security_flags_handle_must_flags(unsigned int *flags)
768 {
769 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
770
771 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
772 *flags = CIFSSEC_MUST_KRB5;
773 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
774 *flags = CIFSSEC_MUST_NTLMSSP;
775 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
776 *flags = CIFSSEC_MUST_NTLMV2;
777 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
778 *flags = CIFSSEC_MUST_NTLM;
779 else if (CIFSSEC_MUST_LANMAN &&
780 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
781 *flags = CIFSSEC_MUST_LANMAN;
782 else if (CIFSSEC_MUST_PLNTXT &&
783 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
784 *flags = CIFSSEC_MUST_PLNTXT;
785
786 *flags |= signflags;
787 }
788
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)789 static ssize_t cifs_security_flags_proc_write(struct file *file,
790 const char __user *buffer, size_t count, loff_t *ppos)
791 {
792 int rc;
793 unsigned int flags;
794 char flags_string[12];
795 bool bv;
796
797 if ((count < 1) || (count > 11))
798 return -EINVAL;
799
800 memset(flags_string, 0, 12);
801
802 if (copy_from_user(flags_string, buffer, count))
803 return -EFAULT;
804
805 if (count < 3) {
806 /* single char or single char followed by null */
807 if (strtobool(flags_string, &bv) == 0) {
808 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
809 return count;
810 } else if (!isdigit(flags_string[0])) {
811 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
812 flags_string);
813 return -EINVAL;
814 }
815 }
816
817 /* else we have a number */
818 rc = kstrtouint(flags_string, 0, &flags);
819 if (rc) {
820 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
821 flags_string);
822 return rc;
823 }
824
825 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
826
827 if (flags == 0) {
828 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
829 return -EINVAL;
830 }
831
832 if (flags & ~CIFSSEC_MASK) {
833 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
834 flags & ~CIFSSEC_MASK);
835 return -EINVAL;
836 }
837
838 cifs_security_flags_handle_must_flags(&flags);
839
840 /* flags look ok - update the global security flags for cifs module */
841 global_secflags = flags;
842 if (global_secflags & CIFSSEC_MUST_SIGN) {
843 /* requiring signing implies signing is allowed */
844 global_secflags |= CIFSSEC_MAY_SIGN;
845 cifs_dbg(FYI, "packet signing now required\n");
846 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
847 cifs_dbg(FYI, "packet signing disabled\n");
848 }
849 /* BB should we turn on MAY flags for other MUST options? */
850 return count;
851 }
852
853 static const struct file_operations cifs_security_flags_proc_fops = {
854 .open = cifs_security_flags_proc_open,
855 .read = seq_read,
856 .llseek = seq_lseek,
857 .release = single_release,
858 .write = cifs_security_flags_proc_write,
859 };
860 #else
cifs_proc_init(void)861 inline void cifs_proc_init(void)
862 {
863 }
864
cifs_proc_clean(void)865 inline void cifs_proc_clean(void)
866 {
867 }
868 #endif /* PROC_FS */
869
