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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 <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_DFS_UPCALL
34#include "dfs_cache.h"
35#endif
36#ifdef CONFIG_CIFS_SMB_DIRECT
37#include "smbdirect.h"
38#endif
39
40void
41cifs_dump_mem(char *label, void *data, int length)
42{
43 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
44 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
45 data, length, true);
46}
47
48void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
49{
50#ifdef CONFIG_CIFS_DEBUG2
51 struct smb_hdr *smb = (struct smb_hdr *)buf;
52
53 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
54 smb->Command, smb->Status.CifsError,
55 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
56 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
57 server->ops->calc_smb_size(smb, server));
58#endif /* CONFIG_CIFS_DEBUG2 */
59}
60
61void cifs_dump_mids(struct TCP_Server_Info *server)
62{
63#ifdef CONFIG_CIFS_DEBUG2
64 struct list_head *tmp;
65 struct mid_q_entry *mid_entry;
66
67 if (server == NULL)
68 return;
69
70 cifs_dbg(VFS, "Dump pending requests:\n");
71 spin_lock(&GlobalMid_Lock);
72 list_for_each(tmp, &server->pending_mid_q) {
73 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
74 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
75 mid_entry->mid_state,
76 le16_to_cpu(mid_entry->command),
77 mid_entry->pid,
78 mid_entry->callback_data,
79 mid_entry->mid);
80#ifdef CONFIG_CIFS_STATS2
81 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
82 mid_entry->large_buf,
83 mid_entry->resp_buf,
84 mid_entry->when_received,
85 jiffies);
86#endif /* STATS2 */
87 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
88 mid_entry->multiRsp, mid_entry->multiEnd);
89 if (mid_entry->resp_buf) {
90 cifs_dump_detail(mid_entry->resp_buf, server);
91 cifs_dump_mem("existing buf: ",
92 mid_entry->resp_buf, 62);
93 }
94 }
95 spin_unlock(&GlobalMid_Lock);
96#endif /* CONFIG_CIFS_DEBUG2 */
97}
98
99#ifdef CONFIG_PROC_FS
100static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
101{
102 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
103
104 seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
105 if (tcon->nativeFileSystem)
106 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
107 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
108 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
109 le32_to_cpu(tcon->fsAttrInfo.Attributes),
110 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
111 tcon->tidStatus);
112 if (dev_type == FILE_DEVICE_DISK)
113 seq_puts(m, " type: DISK ");
114 else if (dev_type == FILE_DEVICE_CD_ROM)
115 seq_puts(m, " type: CDROM ");
116 else
117 seq_printf(m, " type: %d ", dev_type);
118
119 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
120
121 if ((tcon->seal) ||
122 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
123 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
124 seq_printf(m, " Encrypted");
125 if (tcon->nocase)
126 seq_printf(m, " nocase");
127 if (tcon->unix_ext)
128 seq_printf(m, " POSIX Extensions");
129 if (tcon->ses->server->ops->dump_share_caps)
130 tcon->ses->server->ops->dump_share_caps(m, tcon);
131
132 if (tcon->need_reconnect)
133 seq_puts(m, "\tDISCONNECTED ");
134 seq_putc(m, '\n');
135}
136
137static void
138cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
139{
140 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
141 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
142
143 seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
144 seq_puts(m, "\t\tCapabilities: ");
145 if (iface->rdma_capable)
146 seq_puts(m, "rdma ");
147 if (iface->rss_capable)
148 seq_puts(m, "rss ");
149 seq_putc(m, '\n');
150 if (iface->sockaddr.ss_family == AF_INET)
151 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
152 else if (iface->sockaddr.ss_family == AF_INET6)
153 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
154}
155
156static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
157{
158 struct list_head *stmp, *tmp, *tmp1, *tmp2;
159 struct TCP_Server_Info *server;
160 struct cifs_ses *ses;
161 struct cifs_tcon *tcon;
162 struct cifsFileInfo *cfile;
163
164 seq_puts(m, "# Version:1\n");
165 seq_puts(m, "# Format:\n");
166 seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
167#ifdef CONFIG_CIFS_DEBUG2
168 seq_printf(m, " <filename> <mid>\n");
169#else
170 seq_printf(m, " <filename>\n");
171#endif /* CIFS_DEBUG2 */
172 spin_lock(&cifs_tcp_ses_lock);
173 list_for_each(stmp, &cifs_tcp_ses_list) {
174 server = list_entry(stmp, struct TCP_Server_Info,
175 tcp_ses_list);
176 list_for_each(tmp, &server->smb_ses_list) {
177 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
178 list_for_each(tmp1, &ses->tcon_list) {
179 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
180 spin_lock(&tcon->open_file_lock);
181 list_for_each(tmp2, &tcon->openFileList) {
182 cfile = list_entry(tmp2, struct cifsFileInfo,
183 tlist);
184 seq_printf(m,
185 "0x%x 0x%llx 0x%x %d %d %d %s",
186 tcon->tid,
187 cfile->fid.persistent_fid,
188 cfile->f_flags,
189 cfile->count,
190 cfile->pid,
191 from_kuid(&init_user_ns, cfile->uid),
192 cfile->dentry->d_name.name);
193#ifdef CONFIG_CIFS_DEBUG2
194 seq_printf(m, " 0x%llx\n", cfile->fid.mid);
195#else
196 seq_printf(m, "\n");
197#endif /* CIFS_DEBUG2 */
198 }
199 spin_unlock(&tcon->open_file_lock);
200 }
201 }
202 }
203 spin_unlock(&cifs_tcp_ses_lock);
204 seq_putc(m, '\n');
205 return 0;
206}
207
208static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
209{
210 struct list_head *tmp1, *tmp2, *tmp3;
211 struct mid_q_entry *mid_entry;
212 struct TCP_Server_Info *server;
213 struct cifs_ses *ses;
214 struct cifs_tcon *tcon;
215 int i, j;
216
217 seq_puts(m,
218 "Display Internal CIFS Data Structures for Debugging\n"
219 "---------------------------------------------------\n");
220 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
221 seq_printf(m, "Features:");
222#ifdef CONFIG_CIFS_DFS_UPCALL
223 seq_printf(m, " DFS");
224#endif
225#ifdef CONFIG_CIFS_FSCACHE
226 seq_printf(m, ",FSCACHE");
227#endif
228#ifdef CONFIG_CIFS_SMB_DIRECT
229 seq_printf(m, ",SMB_DIRECT");
230#endif
231#ifdef CONFIG_CIFS_STATS2
232 seq_printf(m, ",STATS2");
233#else
234 seq_printf(m, ",STATS");
235#endif
236#ifdef CONFIG_CIFS_DEBUG2
237 seq_printf(m, ",DEBUG2");
238#elif defined(CONFIG_CIFS_DEBUG)
239 seq_printf(m, ",DEBUG");
240#endif
241#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
242 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
243#endif
244#ifdef CONFIG_CIFS_WEAK_PW_HASH
245 seq_printf(m, ",WEAK_PW_HASH");
246#endif
247#ifdef CONFIG_CIFS_POSIX
248 seq_printf(m, ",CIFS_POSIX");
249#endif
250#ifdef CONFIG_CIFS_UPCALL
251 seq_printf(m, ",UPCALL(SPNEGO)");
252#endif
253#ifdef CONFIG_CIFS_XATTR
254 seq_printf(m, ",XATTR");
255#endif
256#ifdef CONFIG_CIFS_ACL
257 seq_printf(m, ",ACL");
258#endif
259 seq_putc(m, '\n');
260 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
261 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
262 seq_printf(m, "Servers:");
263
264 i = 0;
265 spin_lock(&cifs_tcp_ses_lock);
266 list_for_each(tmp1, &cifs_tcp_ses_list) {
267 server = list_entry(tmp1, struct TCP_Server_Info,
268 tcp_ses_list);
269
270#ifdef CONFIG_CIFS_SMB_DIRECT
271 if (!server->rdma)
272 goto skip_rdma;
273
274 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
275 "transport status: %x",
276 server->smbd_conn->protocol,
277 server->smbd_conn->transport_status);
278 seq_printf(m, "\nConn receive_credit_max: %x "
279 "send_credit_target: %x max_send_size: %x",
280 server->smbd_conn->receive_credit_max,
281 server->smbd_conn->send_credit_target,
282 server->smbd_conn->max_send_size);
283 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
284 "max_fragmented_send_size: %x max_receive_size:%x",
285 server->smbd_conn->max_fragmented_recv_size,
286 server->smbd_conn->max_fragmented_send_size,
287 server->smbd_conn->max_receive_size);
288 seq_printf(m, "\nConn keep_alive_interval: %x "
289 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
290 server->smbd_conn->keep_alive_interval,
291 server->smbd_conn->max_readwrite_size,
292 server->smbd_conn->rdma_readwrite_threshold);
293 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
294 "count_put_receive_buffer: %x count_send_empty: %x",
295 server->smbd_conn->count_get_receive_buffer,
296 server->smbd_conn->count_put_receive_buffer,
297 server->smbd_conn->count_send_empty);
298 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
299 "count_enqueue_reassembly_queue: %x "
300 "count_dequeue_reassembly_queue: %x "
301 "fragment_reassembly_remaining: %x "
302 "reassembly_data_length: %x "
303 "reassembly_queue_length: %x",
304 server->smbd_conn->count_reassembly_queue,
305 server->smbd_conn->count_enqueue_reassembly_queue,
306 server->smbd_conn->count_dequeue_reassembly_queue,
307 server->smbd_conn->fragment_reassembly_remaining,
308 server->smbd_conn->reassembly_data_length,
309 server->smbd_conn->reassembly_queue_length);
310 seq_printf(m, "\nCurrent Credits send_credits: %x "
311 "receive_credits: %x receive_credit_target: %x",
312 atomic_read(&server->smbd_conn->send_credits),
313 atomic_read(&server->smbd_conn->receive_credits),
314 server->smbd_conn->receive_credit_target);
315 seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
316 " %x smbd_send_pending: %x smbd_recv_pending: %x",
317 atomic_read(&server->smbd_conn->send_pending),
318 atomic_read(&server->smbd_conn->send_payload_pending),
319 server->smbd_conn->smbd_send_pending,
320 server->smbd_conn->smbd_recv_pending);
321 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
322 "count_empty_packet_queue: %x",
323 server->smbd_conn->count_receive_queue,
324 server->smbd_conn->count_empty_packet_queue);
325 seq_printf(m, "\nMR responder_resources: %x "
326 "max_frmr_depth: %x mr_type: %x",
327 server->smbd_conn->responder_resources,
328 server->smbd_conn->max_frmr_depth,
329 server->smbd_conn->mr_type);
330 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
331 atomic_read(&server->smbd_conn->mr_ready_count),
332 atomic_read(&server->smbd_conn->mr_used_count));
333skip_rdma:
334#endif
335 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
336 server->credits, server->dialect);
337 if (server->sign)
338 seq_printf(m, " signed");
339 if (server->posix_ext_supported)
340 seq_printf(m, " posix");
341
342 i++;
343 list_for_each(tmp2, &server->smb_ses_list) {
344 ses = list_entry(tmp2, struct cifs_ses,
345 smb_ses_list);
346 if ((ses->serverDomain == NULL) ||
347 (ses->serverOS == NULL) ||
348 (ses->serverNOS == NULL)) {
349 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
350 i, ses->serverName, ses->ses_count,
351 ses->capabilities, ses->status);
352 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
353 seq_printf(m, "Guest\t");
354 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
355 seq_printf(m, "Anonymous\t");
356 } else {
357 seq_printf(m,
358 "\n%d) Name: %s Domain: %s Uses: %d OS:"
359 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
360 " session status: %d ",
361 i, ses->serverName, ses->serverDomain,
362 ses->ses_count, ses->serverOS, ses->serverNOS,
363 ses->capabilities, ses->status);
364 }
365 if (server->rdma)
366 seq_printf(m, "RDMA\n\t");
367 seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
368 "Server: %d SecMode: 0x%x Req On Wire: %d",
369 server->tcpStatus,
370 server->reconnect_instance,
371 server->srv_count,
372 server->sec_mode, in_flight(server));
373
374#ifdef CONFIG_CIFS_STATS2
375 seq_printf(m, " In Send: %d In MaxReq Wait: %d",
376 atomic_read(&server->in_send),
377 atomic_read(&server->num_waiters));
378#endif
379 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
380 seq_puts(m, " encrypted");
381 if (ses->sign)
382 seq_puts(m, " signed");
383
384 seq_puts(m, "\n\tShares:");
385 j = 0;
386
387 seq_printf(m, "\n\t%d) IPC: ", j);
388 if (ses->tcon_ipc)
389 cifs_debug_tcon(m, ses->tcon_ipc);
390 else
391 seq_puts(m, "none\n");
392
393 list_for_each(tmp3, &ses->tcon_list) {
394 tcon = list_entry(tmp3, struct cifs_tcon,
395 tcon_list);
396 ++j;
397 seq_printf(m, "\n\t%d) ", j);
398 cifs_debug_tcon(m, tcon);
399 }
400
401 seq_puts(m, "\n\tMIDs:\n");
402
403 spin_lock(&GlobalMid_Lock);
404 list_for_each(tmp3, &server->pending_mid_q) {
405 mid_entry = list_entry(tmp3, struct mid_q_entry,
406 qhead);
407 seq_printf(m, "\tState: %d com: %d pid:"
408 " %d cbdata: %p mid %llu\n",
409 mid_entry->mid_state,
410 le16_to_cpu(mid_entry->command),
411 mid_entry->pid,
412 mid_entry->callback_data,
413 mid_entry->mid);
414 }
415 spin_unlock(&GlobalMid_Lock);
416
417 spin_lock(&ses->iface_lock);
418 if (ses->iface_count)
419 seq_printf(m, "\n\tServer interfaces: %zu\n",
420 ses->iface_count);
421 for (j = 0; j < ses->iface_count; j++) {
422 seq_printf(m, "\t%d)", j);
423 cifs_dump_iface(m, &ses->iface_list[j]);
424 }
425 spin_unlock(&ses->iface_lock);
426 }
427 }
428 spin_unlock(&cifs_tcp_ses_lock);
429 seq_putc(m, '\n');
430
431 /* BB add code to dump additional info such as TCP session info now */
432 return 0;
433}
434
435static ssize_t cifs_stats_proc_write(struct file *file,
436 const char __user *buffer, size_t count, loff_t *ppos)
437{
438 bool bv;
439 int rc;
440 struct list_head *tmp1, *tmp2, *tmp3;
441 struct TCP_Server_Info *server;
442 struct cifs_ses *ses;
443 struct cifs_tcon *tcon;
444
445 rc = kstrtobool_from_user(buffer, count, &bv);
446 if (rc == 0) {
447#ifdef CONFIG_CIFS_STATS2
448 int i;
449
450 atomic_set(&totBufAllocCount, 0);
451 atomic_set(&totSmBufAllocCount, 0);
452#endif /* CONFIG_CIFS_STATS2 */
453 atomic_set(&tcpSesReconnectCount, 0);
454 atomic_set(&tconInfoReconnectCount, 0);
455
456 spin_lock(&GlobalMid_Lock);
457 GlobalMaxActiveXid = 0;
458 GlobalCurrentXid = 0;
459 spin_unlock(&GlobalMid_Lock);
460 spin_lock(&cifs_tcp_ses_lock);
461 list_for_each(tmp1, &cifs_tcp_ses_list) {
462 server = list_entry(tmp1, struct TCP_Server_Info,
463 tcp_ses_list);
464#ifdef CONFIG_CIFS_STATS2
465 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
466 atomic_set(&server->smb2slowcmd[i], 0);
467#endif /* CONFIG_CIFS_STATS2 */
468 list_for_each(tmp2, &server->smb_ses_list) {
469 ses = list_entry(tmp2, struct cifs_ses,
470 smb_ses_list);
471 list_for_each(tmp3, &ses->tcon_list) {
472 tcon = list_entry(tmp3,
473 struct cifs_tcon,
474 tcon_list);
475 atomic_set(&tcon->num_smbs_sent, 0);
476 spin_lock(&tcon->stat_lock);
477 tcon->bytes_read = 0;
478 tcon->bytes_written = 0;
479 spin_unlock(&tcon->stat_lock);
480 if (server->ops->clear_stats)
481 server->ops->clear_stats(tcon);
482 }
483 }
484 }
485 spin_unlock(&cifs_tcp_ses_lock);
486 } else {
487 return rc;
488 }
489
490 return count;
491}
492
493static int cifs_stats_proc_show(struct seq_file *m, void *v)
494{
495 int i;
496#ifdef CONFIG_CIFS_STATS2
497 int j;
498#endif /* STATS2 */
499 struct list_head *tmp1, *tmp2, *tmp3;
500 struct TCP_Server_Info *server;
501 struct cifs_ses *ses;
502 struct cifs_tcon *tcon;
503
504 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
505 sesInfoAllocCount.counter);
506 seq_printf(m, "Share (unique mount targets): %d\n",
507 tconInfoAllocCount.counter);
508 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
509 bufAllocCount.counter,
510 cifs_min_rcv + tcpSesAllocCount.counter);
511 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
512 smBufAllocCount.counter, cifs_min_small);
513#ifdef CONFIG_CIFS_STATS2
514 seq_printf(m, "Total Large %d Small %d Allocations\n",
515 atomic_read(&totBufAllocCount),
516 atomic_read(&totSmBufAllocCount));
517#endif /* CONFIG_CIFS_STATS2 */
518
519 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
520 seq_printf(m,
521 "\n%d session %d share reconnects\n",
522 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
523
524 seq_printf(m,
525 "Total vfs operations: %d maximum at one time: %d\n",
526 GlobalCurrentXid, GlobalMaxActiveXid);
527
528 i = 0;
529 spin_lock(&cifs_tcp_ses_lock);
530 list_for_each(tmp1, &cifs_tcp_ses_list) {
531 server = list_entry(tmp1, struct TCP_Server_Info,
532 tcp_ses_list);
533#ifdef CONFIG_CIFS_STATS2
534 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
535 if (atomic_read(&server->smb2slowcmd[j]))
536 seq_printf(m, "%d slow responses from %s for command %d\n",
537 atomic_read(&server->smb2slowcmd[j]),
538 server->hostname, j);
539#endif /* STATS2 */
540 list_for_each(tmp2, &server->smb_ses_list) {
541 ses = list_entry(tmp2, struct cifs_ses,
542 smb_ses_list);
543 list_for_each(tmp3, &ses->tcon_list) {
544 tcon = list_entry(tmp3,
545 struct cifs_tcon,
546 tcon_list);
547 i++;
548 seq_printf(m, "\n%d) %s", i, tcon->treeName);
549 if (tcon->need_reconnect)
550 seq_puts(m, "\tDISCONNECTED ");
551 seq_printf(m, "\nSMBs: %d",
552 atomic_read(&tcon->num_smbs_sent));
553 if (server->ops->print_stats)
554 server->ops->print_stats(m, tcon);
555 }
556 }
557 }
558 spin_unlock(&cifs_tcp_ses_lock);
559
560 seq_putc(m, '\n');
561 return 0;
562}
563
564static int cifs_stats_proc_open(struct inode *inode, struct file *file)
565{
566 return single_open(file, cifs_stats_proc_show, NULL);
567}
568
569static const struct file_operations cifs_stats_proc_fops = {
570 .open = cifs_stats_proc_open,
571 .read = seq_read,
572 .llseek = seq_lseek,
573 .release = single_release,
574 .write = cifs_stats_proc_write,
575};
576
577#ifdef CONFIG_CIFS_SMB_DIRECT
578#define PROC_FILE_DEFINE(name) \
579static ssize_t name##_write(struct file *file, const char __user *buffer, \
580 size_t count, loff_t *ppos) \
581{ \
582 int rc; \
583 rc = kstrtoint_from_user(buffer, count, 10, & name); \
584 if (rc) \
585 return rc; \
586 return count; \
587} \
588static int name##_proc_show(struct seq_file *m, void *v) \
589{ \
590 seq_printf(m, "%d\n", name ); \
591 return 0; \
592} \
593static int name##_open(struct inode *inode, struct file *file) \
594{ \
595 return single_open(file, name##_proc_show, NULL); \
596} \
597\
598static const struct file_operations cifs_##name##_proc_fops = { \
599 .open = name##_open, \
600 .read = seq_read, \
601 .llseek = seq_lseek, \
602 .release = single_release, \
603 .write = name##_write, \
604}
605
606PROC_FILE_DEFINE(rdma_readwrite_threshold);
607PROC_FILE_DEFINE(smbd_max_frmr_depth);
608PROC_FILE_DEFINE(smbd_keep_alive_interval);
609PROC_FILE_DEFINE(smbd_max_receive_size);
610PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
611PROC_FILE_DEFINE(smbd_max_send_size);
612PROC_FILE_DEFINE(smbd_send_credit_target);
613PROC_FILE_DEFINE(smbd_receive_credit_max);
614#endif
615
616static struct proc_dir_entry *proc_fs_cifs;
617static const struct file_operations cifsFYI_proc_fops;
618static const struct file_operations cifs_lookup_cache_proc_fops;
619static const struct file_operations traceSMB_proc_fops;
620static const struct file_operations cifs_security_flags_proc_fops;
621static const struct file_operations cifs_linux_ext_proc_fops;
622
623void
624cifs_proc_init(void)
625{
626 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
627 if (proc_fs_cifs == NULL)
628 return;
629
630 proc_create_single("DebugData", 0, proc_fs_cifs,
631 cifs_debug_data_proc_show);
632
633 proc_create_single("open_files", 0400, proc_fs_cifs,
634 cifs_debug_files_proc_show);
635
636 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
637 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
638 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
639 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
640 &cifs_linux_ext_proc_fops);
641 proc_create("SecurityFlags", 0644, proc_fs_cifs,
642 &cifs_security_flags_proc_fops);
643 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
644 &cifs_lookup_cache_proc_fops);
645
646#ifdef CONFIG_CIFS_DFS_UPCALL
647 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops);
648#endif
649
650#ifdef CONFIG_CIFS_SMB_DIRECT
651 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
652 &cifs_rdma_readwrite_threshold_proc_fops);
653 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
654 &cifs_smbd_max_frmr_depth_proc_fops);
655 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
656 &cifs_smbd_keep_alive_interval_proc_fops);
657 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
658 &cifs_smbd_max_receive_size_proc_fops);
659 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
660 &cifs_smbd_max_fragmented_recv_size_proc_fops);
661 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
662 &cifs_smbd_max_send_size_proc_fops);
663 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
664 &cifs_smbd_send_credit_target_proc_fops);
665 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
666 &cifs_smbd_receive_credit_max_proc_fops);
667#endif
668}
669
670void
671cifs_proc_clean(void)
672{
673 if (proc_fs_cifs == NULL)
674 return;
675
676 remove_proc_entry("DebugData", proc_fs_cifs);
677 remove_proc_entry("open_files", proc_fs_cifs);
678 remove_proc_entry("cifsFYI", proc_fs_cifs);
679 remove_proc_entry("traceSMB", proc_fs_cifs);
680 remove_proc_entry("Stats", proc_fs_cifs);
681 remove_proc_entry("SecurityFlags", proc_fs_cifs);
682 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
683 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
684
685#ifdef CONFIG_CIFS_DFS_UPCALL
686 remove_proc_entry("dfscache", proc_fs_cifs);
687#endif
688#ifdef CONFIG_CIFS_SMB_DIRECT
689 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
690 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
691 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
692 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
693 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
694 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
695 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
696 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
697#endif
698 remove_proc_entry("fs/cifs", NULL);
699}
700
701static int cifsFYI_proc_show(struct seq_file *m, void *v)
702{
703 seq_printf(m, "%d\n", cifsFYI);
704 return 0;
705}
706
707static int cifsFYI_proc_open(struct inode *inode, struct file *file)
708{
709 return single_open(file, cifsFYI_proc_show, NULL);
710}
711
712static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
713 size_t count, loff_t *ppos)
714{
715 char c[2] = { '\0' };
716 bool bv;
717 int rc;
718
719 rc = get_user(c[0], buffer);
720 if (rc)
721 return rc;
722 if (strtobool(c, &bv) == 0)
723 cifsFYI = bv;
724 else if ((c[0] > '1') && (c[0] <= '9'))
725 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
726 else
727 return -EINVAL;
728
729 return count;
730}
731
732static const struct file_operations cifsFYI_proc_fops = {
733 .open = cifsFYI_proc_open,
734 .read = seq_read,
735 .llseek = seq_lseek,
736 .release = single_release,
737 .write = cifsFYI_proc_write,
738};
739
740static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
741{
742 seq_printf(m, "%d\n", linuxExtEnabled);
743 return 0;
744}
745
746static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
747{
748 return single_open(file, cifs_linux_ext_proc_show, NULL);
749}
750
751static ssize_t cifs_linux_ext_proc_write(struct file *file,
752 const char __user *buffer, size_t count, loff_t *ppos)
753{
754 int rc;
755
756 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
757 if (rc)
758 return rc;
759
760 return count;
761}
762
763static const struct file_operations cifs_linux_ext_proc_fops = {
764 .open = cifs_linux_ext_proc_open,
765 .read = seq_read,
766 .llseek = seq_lseek,
767 .release = single_release,
768 .write = cifs_linux_ext_proc_write,
769};
770
771static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
772{
773 seq_printf(m, "%d\n", lookupCacheEnabled);
774 return 0;
775}
776
777static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
778{
779 return single_open(file, cifs_lookup_cache_proc_show, NULL);
780}
781
782static ssize_t cifs_lookup_cache_proc_write(struct file *file,
783 const char __user *buffer, size_t count, loff_t *ppos)
784{
785 int rc;
786
787 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
788 if (rc)
789 return rc;
790
791 return count;
792}
793
794static const struct file_operations cifs_lookup_cache_proc_fops = {
795 .open = cifs_lookup_cache_proc_open,
796 .read = seq_read,
797 .llseek = seq_lseek,
798 .release = single_release,
799 .write = cifs_lookup_cache_proc_write,
800};
801
802static int traceSMB_proc_show(struct seq_file *m, void *v)
803{
804 seq_printf(m, "%d\n", traceSMB);
805 return 0;
806}
807
808static int traceSMB_proc_open(struct inode *inode, struct file *file)
809{
810 return single_open(file, traceSMB_proc_show, NULL);
811}
812
813static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
814 size_t count, loff_t *ppos)
815{
816 int rc;
817
818 rc = kstrtobool_from_user(buffer, count, &traceSMB);
819 if (rc)
820 return rc;
821
822 return count;
823}
824
825static const struct file_operations traceSMB_proc_fops = {
826 .open = traceSMB_proc_open,
827 .read = seq_read,
828 .llseek = seq_lseek,
829 .release = single_release,
830 .write = traceSMB_proc_write,
831};
832
833static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
834{
835 seq_printf(m, "0x%x\n", global_secflags);
836 return 0;
837}
838
839static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
840{
841 return single_open(file, cifs_security_flags_proc_show, NULL);
842}
843
844/*
845 * Ensure that if someone sets a MUST flag, that we disable all other MAY
846 * flags except for the ones corresponding to the given MUST flag. If there are
847 * multiple MUST flags, then try to prefer more secure ones.
848 */
849static void
850cifs_security_flags_handle_must_flags(unsigned int *flags)
851{
852 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
853
854 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
855 *flags = CIFSSEC_MUST_KRB5;
856 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
857 *flags = CIFSSEC_MUST_NTLMSSP;
858 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
859 *flags = CIFSSEC_MUST_NTLMV2;
860 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
861 *flags = CIFSSEC_MUST_NTLM;
862 else if (CIFSSEC_MUST_LANMAN &&
863 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
864 *flags = CIFSSEC_MUST_LANMAN;
865 else if (CIFSSEC_MUST_PLNTXT &&
866 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
867 *flags = CIFSSEC_MUST_PLNTXT;
868
869 *flags |= signflags;
870}
871
872static ssize_t cifs_security_flags_proc_write(struct file *file,
873 const char __user *buffer, size_t count, loff_t *ppos)
874{
875 int rc;
876 unsigned int flags;
877 char flags_string[12];
878 bool bv;
879
880 if ((count < 1) || (count > 11))
881 return -EINVAL;
882
883 memset(flags_string, 0, 12);
884
885 if (copy_from_user(flags_string, buffer, count))
886 return -EFAULT;
887
888 if (count < 3) {
889 /* single char or single char followed by null */
890 if (strtobool(flags_string, &bv) == 0) {
891 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
892 return count;
893 } else if (!isdigit(flags_string[0])) {
894 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
895 flags_string);
896 return -EINVAL;
897 }
898 }
899
900 /* else we have a number */
901 rc = kstrtouint(flags_string, 0, &flags);
902 if (rc) {
903 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
904 flags_string);
905 return rc;
906 }
907
908 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
909
910 if (flags == 0) {
911 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
912 return -EINVAL;
913 }
914
915 if (flags & ~CIFSSEC_MASK) {
916 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
917 flags & ~CIFSSEC_MASK);
918 return -EINVAL;
919 }
920
921 cifs_security_flags_handle_must_flags(&flags);
922
923 /* flags look ok - update the global security flags for cifs module */
924 global_secflags = flags;
925 if (global_secflags & CIFSSEC_MUST_SIGN) {
926 /* requiring signing implies signing is allowed */
927 global_secflags |= CIFSSEC_MAY_SIGN;
928 cifs_dbg(FYI, "packet signing now required\n");
929 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
930 cifs_dbg(FYI, "packet signing disabled\n");
931 }
932 /* BB should we turn on MAY flags for other MUST options? */
933 return count;
934}
935
936static const struct file_operations cifs_security_flags_proc_fops = {
937 .open = cifs_security_flags_proc_open,
938 .read = seq_read,
939 .llseek = seq_lseek,
940 .release = single_release,
941 .write = cifs_security_flags_proc_write,
942};
943#else
944inline void cifs_proc_init(void)
945{
946}
947
948inline void cifs_proc_clean(void)
949{
950}
951#endif /* PROC_FS */
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