1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *
4 * Copyright (C) International Business Machines Corp., 2000,2005
5 *
6 * Modified by Steve French (sfrench@us.ibm.com)
7 */
8 #include <linux/fs.h>
9 #include <linux/string.h>
10 #include <linux/ctype.h>
11 #include <linux/kstrtox.h>
12 #include <linux/module.h>
13 #include <linux/proc_fs.h>
14 #include <linux/uaccess.h>
15 #include <uapi/linux/ethtool.h>
16 #include "cifspdu.h"
17 #include "cifsglob.h"
18 #include "cifsproto.h"
19 #include "cifs_debug.h"
20 #include "cifsfs.h"
21 #include "fs_context.h"
22 #ifdef CONFIG_CIFS_DFS_UPCALL
23 #include "dfs_cache.h"
24 #endif
25 #ifdef CONFIG_CIFS_SMB_DIRECT
26 #include "smbdirect.h"
27 #endif
28 #include "cifs_swn.h"
29
30 void
31 cifs_dump_mem(char *label, void *data, int length)
32 {
33 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
34 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
35 data, length, true);
36 }
37
38 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
39 {
40 #ifdef CONFIG_CIFS_DEBUG2
41 struct smb_hdr *smb = buf;
42
43 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n",
44 smb->Command, smb->Status.CifsError, smb->Flags,
45 smb->Flags2, smb->Mid, smb->Pid, smb->WordCount);
46 if (!server->ops->check_message(buf, server->total_read, server)) {
47 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
48 server->ops->calc_smb_size(smb));
49 }
50 #endif /* CONFIG_CIFS_DEBUG2 */
51 }
52
53 void cifs_dump_mids(struct TCP_Server_Info *server)
54 {
55 #ifdef CONFIG_CIFS_DEBUG2
56 struct mid_q_entry *mid_entry;
57
58 if (server == NULL)
59 return;
60
61 cifs_dbg(VFS, "Dump pending requests:\n");
62 spin_lock(&server->mid_lock);
63 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
64 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
65 mid_entry->mid_state,
66 le16_to_cpu(mid_entry->command),
67 mid_entry->pid,
68 mid_entry->callback_data,
69 mid_entry->mid);
70 #ifdef CONFIG_CIFS_STATS2
71 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
72 mid_entry->large_buf,
73 mid_entry->resp_buf,
74 mid_entry->when_received,
75 jiffies);
76 #endif /* STATS2 */
77 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
78 mid_entry->multiRsp, mid_entry->multiEnd);
79 if (mid_entry->resp_buf) {
80 cifs_dump_detail(mid_entry->resp_buf, server);
81 cifs_dump_mem("existing buf: ",
82 mid_entry->resp_buf, 62);
83 }
84 }
85 spin_unlock(&server->mid_lock);
86 #endif /* CONFIG_CIFS_DEBUG2 */
87 }
88
89 #ifdef CONFIG_PROC_FS
90 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
91 {
92 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
93
94 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
95 if (tcon->nativeFileSystem)
96 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
97 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
98 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
99 le32_to_cpu(tcon->fsAttrInfo.Attributes),
100 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
101 tcon->status);
102 if (dev_type == FILE_DEVICE_DISK)
103 seq_puts(m, " type: DISK ");
104 else if (dev_type == FILE_DEVICE_CD_ROM)
105 seq_puts(m, " type: CDROM ");
106 else
107 seq_printf(m, " type: %d ", dev_type);
108
109 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
110
111 if ((tcon->seal) ||
112 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
113 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
114 seq_puts(m, " encrypted");
115 if (tcon->nocase)
116 seq_printf(m, " nocase");
117 if (tcon->unix_ext)
118 seq_printf(m, " POSIX Extensions");
119 if (tcon->ses->server->ops->dump_share_caps)
120 tcon->ses->server->ops->dump_share_caps(m, tcon);
121 if (tcon->use_witness)
122 seq_puts(m, " Witness");
123 if (tcon->broken_sparse_sup)
124 seq_puts(m, " nosparse");
125 if (tcon->need_reconnect)
126 seq_puts(m, "\tDISCONNECTED ");
127 spin_lock(&tcon->tc_lock);
128 if (tcon->origin_fullpath) {
129 seq_printf(m, "\n\tDFS origin fullpath: %s",
130 tcon->origin_fullpath);
131 }
132 spin_unlock(&tcon->tc_lock);
133 seq_putc(m, '\n');
134 }
135
136 static void
137 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
138 {
139 struct TCP_Server_Info *server = chan->server;
140
141 if (!server) {
142 seq_printf(m, "\n\n\t\tChannel: %d DISABLED", i+1);
143 return;
144 }
145
146 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
147 "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
148 "\n\t\tTCP status: %d Instance: %d"
149 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
150 "\n\t\tIn Send: %d In MaxReq Wait: %d",
151 i+1, server->conn_id,
152 server->credits,
153 server->echo_credits,
154 server->oplock_credits,
155 server->dialect,
156 server->tcpStatus,
157 server->reconnect_instance,
158 server->srv_count,
159 server->sec_mode,
160 in_flight(server),
161 atomic_read(&server->in_send),
162 atomic_read(&server->num_waiters));
163 #ifdef CONFIG_NET_NS
164 if (server->net)
165 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
166 #endif /* NET_NS */
167
168 }
169
170 static inline const char *smb_speed_to_str(size_t bps)
171 {
172 size_t mbps = bps / 1000 / 1000;
173
174 switch (mbps) {
175 case SPEED_10:
176 return "10Mbps";
177 case SPEED_100:
178 return "100Mbps";
179 case SPEED_1000:
180 return "1Gbps";
181 case SPEED_2500:
182 return "2.5Gbps";
183 case SPEED_5000:
184 return "5Gbps";
185 case SPEED_10000:
186 return "10Gbps";
187 case SPEED_14000:
188 return "14Gbps";
189 case SPEED_20000:
190 return "20Gbps";
191 case SPEED_25000:
192 return "25Gbps";
193 case SPEED_40000:
194 return "40Gbps";
195 case SPEED_50000:
196 return "50Gbps";
197 case SPEED_56000:
198 return "56Gbps";
199 case SPEED_100000:
200 return "100Gbps";
201 case SPEED_200000:
202 return "200Gbps";
203 case SPEED_400000:
204 return "400Gbps";
205 case SPEED_800000:
206 return "800Gbps";
207 default:
208 return "Unknown";
209 }
210 }
211
212 static void
213 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
214 {
215 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
216 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
217
218 seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
219 seq_puts(m, "\t\tCapabilities: ");
220 if (iface->rdma_capable)
221 seq_puts(m, "rdma ");
222 if (iface->rss_capable)
223 seq_puts(m, "rss ");
224 if (!iface->rdma_capable && !iface->rss_capable)
225 seq_puts(m, "None");
226 seq_putc(m, '\n');
227 if (iface->sockaddr.ss_family == AF_INET)
228 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
229 else if (iface->sockaddr.ss_family == AF_INET6)
230 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
231 if (!iface->is_active)
232 seq_puts(m, "\t\t[for-cleanup]\n");
233 }
234
235 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
236 {
237 struct TCP_Server_Info *server;
238 struct cifs_ses *ses;
239 struct cifs_tcon *tcon;
240 struct cifsFileInfo *cfile;
241
242 seq_puts(m, "# Version:1\n");
243 seq_puts(m, "# Format:\n");
244 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
245 #ifdef CONFIG_CIFS_DEBUG2
246 seq_printf(m, " <filename> <mid>\n");
247 #else
248 seq_printf(m, " <filename>\n");
249 #endif /* CIFS_DEBUG2 */
250 spin_lock(&cifs_tcp_ses_lock);
251 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
252 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
253 if (cifs_ses_exiting(ses))
254 continue;
255 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
256 spin_lock(&tcon->open_file_lock);
257 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
258 seq_printf(m,
259 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
260 tcon->tid,
261 ses->Suid,
262 cfile->fid.persistent_fid,
263 cfile->f_flags,
264 cfile->count,
265 cfile->pid,
266 from_kuid(&init_user_ns, cfile->uid),
267 cfile->dentry);
268 #ifdef CONFIG_CIFS_DEBUG2
269 seq_printf(m, " %llu\n", cfile->fid.mid);
270 #else
271 seq_printf(m, "\n");
272 #endif /* CIFS_DEBUG2 */
273 }
274 spin_unlock(&tcon->open_file_lock);
275 }
276 }
277 }
278 spin_unlock(&cifs_tcp_ses_lock);
279 seq_putc(m, '\n');
280 return 0;
281 }
282
283 static __always_inline const char *compression_alg_str(__le16 alg)
284 {
285 switch (alg) {
286 case SMB3_COMPRESS_NONE:
287 return "NONE";
288 case SMB3_COMPRESS_LZNT1:
289 return "LZNT1";
290 case SMB3_COMPRESS_LZ77:
291 return "LZ77";
292 case SMB3_COMPRESS_LZ77_HUFF:
293 return "LZ77-Huffman";
294 case SMB3_COMPRESS_PATTERN:
295 return "Pattern_V1";
296 default:
297 return "invalid";
298 }
299 }
300
301 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
302 {
303 struct mid_q_entry *mid_entry;
304 struct TCP_Server_Info *server;
305 struct TCP_Server_Info *chan_server;
306 struct cifs_ses *ses;
307 struct cifs_tcon *tcon;
308 struct cifs_server_iface *iface;
309 size_t iface_weight = 0, iface_min_speed = 0;
310 struct cifs_server_iface *last_iface = NULL;
311 int c, i, j;
312
313 seq_puts(m,
314 "Display Internal CIFS Data Structures for Debugging\n"
315 "---------------------------------------------------\n");
316 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
317 seq_printf(m, "Features:");
318 #ifdef CONFIG_CIFS_DFS_UPCALL
319 seq_printf(m, " DFS");
320 #endif
321 #ifdef CONFIG_CIFS_FSCACHE
322 seq_printf(m, ",FSCACHE");
323 #endif
324 #ifdef CONFIG_CIFS_SMB_DIRECT
325 seq_printf(m, ",SMB_DIRECT");
326 #endif
327 #ifdef CONFIG_CIFS_STATS2
328 seq_printf(m, ",STATS2");
329 #else
330 seq_printf(m, ",STATS");
331 #endif
332 #ifdef CONFIG_CIFS_DEBUG2
333 seq_printf(m, ",DEBUG2");
334 #elif defined(CONFIG_CIFS_DEBUG)
335 seq_printf(m, ",DEBUG");
336 #endif
337 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
338 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
339 #endif
340 #ifdef CONFIG_CIFS_POSIX
341 seq_printf(m, ",CIFS_POSIX");
342 #endif
343 #ifdef CONFIG_CIFS_UPCALL
344 seq_printf(m, ",UPCALL(SPNEGO)");
345 #endif
346 #ifdef CONFIG_CIFS_XATTR
347 seq_printf(m, ",XATTR");
348 #endif
349 seq_printf(m, ",ACL");
350 #ifdef CONFIG_CIFS_SWN_UPCALL
351 seq_puts(m, ",WITNESS");
352 #endif
353 seq_putc(m, '\n');
354 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
355 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
356
357 seq_printf(m, "\nServers: ");
358
359 c = 0;
360 spin_lock(&cifs_tcp_ses_lock);
361 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
362 /* channel info will be printed as a part of sessions below */
363 if (SERVER_IS_CHAN(server))
364 continue;
365
366 c++;
367 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
368 c, server->conn_id);
369
370 spin_lock(&server->srv_lock);
371 if (server->hostname)
372 seq_printf(m, "Hostname: %s ", server->hostname);
373 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
374 spin_unlock(&server->srv_lock);
375 #ifdef CONFIG_CIFS_SMB_DIRECT
376 if (!server->rdma)
377 goto skip_rdma;
378
379 if (!server->smbd_conn) {
380 seq_printf(m, "\nSMBDirect transport not available");
381 goto skip_rdma;
382 }
383
384 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
385 "transport status: %x",
386 server->smbd_conn->protocol,
387 server->smbd_conn->transport_status);
388 seq_printf(m, "\nConn receive_credit_max: %x "
389 "send_credit_target: %x max_send_size: %x",
390 server->smbd_conn->receive_credit_max,
391 server->smbd_conn->send_credit_target,
392 server->smbd_conn->max_send_size);
393 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
394 "max_fragmented_send_size: %x max_receive_size:%x",
395 server->smbd_conn->max_fragmented_recv_size,
396 server->smbd_conn->max_fragmented_send_size,
397 server->smbd_conn->max_receive_size);
398 seq_printf(m, "\nConn keep_alive_interval: %x "
399 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
400 server->smbd_conn->keep_alive_interval,
401 server->smbd_conn->max_readwrite_size,
402 server->smbd_conn->rdma_readwrite_threshold);
403 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
404 "count_put_receive_buffer: %x count_send_empty: %x",
405 server->smbd_conn->count_get_receive_buffer,
406 server->smbd_conn->count_put_receive_buffer,
407 server->smbd_conn->count_send_empty);
408 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
409 "count_enqueue_reassembly_queue: %x "
410 "count_dequeue_reassembly_queue: %x "
411 "fragment_reassembly_remaining: %x "
412 "reassembly_data_length: %x "
413 "reassembly_queue_length: %x",
414 server->smbd_conn->count_reassembly_queue,
415 server->smbd_conn->count_enqueue_reassembly_queue,
416 server->smbd_conn->count_dequeue_reassembly_queue,
417 server->smbd_conn->fragment_reassembly_remaining,
418 server->smbd_conn->reassembly_data_length,
419 server->smbd_conn->reassembly_queue_length);
420 seq_printf(m, "\nCurrent Credits send_credits: %x "
421 "receive_credits: %x receive_credit_target: %x",
422 atomic_read(&server->smbd_conn->send_credits),
423 atomic_read(&server->smbd_conn->receive_credits),
424 server->smbd_conn->receive_credit_target);
425 seq_printf(m, "\nPending send_pending: %x ",
426 atomic_read(&server->smbd_conn->send_pending));
427 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
428 "count_empty_packet_queue: %x",
429 server->smbd_conn->count_receive_queue,
430 server->smbd_conn->count_empty_packet_queue);
431 seq_printf(m, "\nMR responder_resources: %x "
432 "max_frmr_depth: %x mr_type: %x",
433 server->smbd_conn->responder_resources,
434 server->smbd_conn->max_frmr_depth,
435 server->smbd_conn->mr_type);
436 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
437 atomic_read(&server->smbd_conn->mr_ready_count),
438 atomic_read(&server->smbd_conn->mr_used_count));
439 skip_rdma:
440 #endif
441 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
442 server->credits,
443 server->echo_credits,
444 server->oplock_credits,
445 server->dialect);
446 if (server->sign)
447 seq_printf(m, " signed");
448 if (server->posix_ext_supported)
449 seq_printf(m, " posix");
450 if (server->nosharesock)
451 seq_printf(m, " nosharesock");
452
453 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities);
454
455 if (server->rdma)
456 seq_printf(m, "\nRDMA ");
457 seq_printf(m, "\nTCP status: %d Instance: %d"
458 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
459 server->tcpStatus,
460 server->reconnect_instance,
461 server->srv_count,
462 server->sec_mode, in_flight(server));
463 #ifdef CONFIG_NET_NS
464 if (server->net)
465 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
466 #endif /* NET_NS */
467
468 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
469 atomic_read(&server->in_send),
470 atomic_read(&server->num_waiters));
471
472 if (server->leaf_fullpath) {
473 seq_printf(m, "\nDFS leaf full path: %s",
474 server->leaf_fullpath);
475 }
476
477 seq_puts(m, "\nCompression: ");
478 if (!server->compression.requested)
479 seq_puts(m, "disabled on mount");
480 else if (server->compression.enabled)
481 seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg));
482 else
483 seq_puts(m, "disabled (not supported by this server)");
484
485 seq_printf(m, "\n\n\tSessions: ");
486 i = 0;
487 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
488 spin_lock(&ses->ses_lock);
489 if (ses->ses_status == SES_EXITING) {
490 spin_unlock(&ses->ses_lock);
491 continue;
492 }
493 i++;
494 if ((ses->serverDomain == NULL) ||
495 (ses->serverOS == NULL) ||
496 (ses->serverNOS == NULL)) {
497 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
498 i, ses->ip_addr, ses->ses_count,
499 ses->capabilities, ses->ses_status);
500 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
501 seq_printf(m, "Guest ");
502 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
503 seq_printf(m, "Anonymous ");
504 } else {
505 seq_printf(m,
506 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
507 "\n\tNOS: %s\tCapability: 0x%x"
508 "\n\tSMB session status: %d ",
509 i, ses->ip_addr, ses->serverDomain,
510 ses->ses_count, ses->serverOS, ses->serverNOS,
511 ses->capabilities, ses->ses_status);
512 }
513 if (ses->expired_pwd)
514 seq_puts(m, "password no longer valid ");
515 spin_unlock(&ses->ses_lock);
516
517 seq_printf(m, "\n\tSecurity type: %s ",
518 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
519
520 /* dump session id helpful for use with network trace */
521 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
522 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
523 seq_puts(m, " encrypted");
524 /* can help in debugging to show encryption type */
525 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
526 seq_puts(m, "(gcm256)");
527 }
528 if (ses->sign)
529 seq_puts(m, " signed");
530
531 seq_printf(m, "\n\tUser: %d Cred User: %d",
532 from_kuid(&init_user_ns, ses->linux_uid),
533 from_kuid(&init_user_ns, ses->cred_uid));
534
535 if (ses->dfs_root_ses) {
536 seq_printf(m, "\n\tDFS root session id: 0x%llx",
537 ses->dfs_root_ses->Suid);
538 }
539
540 spin_lock(&ses->chan_lock);
541 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
542 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
543 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
544 seq_puts(m, "\t[RECONNECTING] ");
545
546 if (ses->chan_count > 1) {
547 seq_printf(m, "\n\n\tExtra Channels: %zu ",
548 ses->chan_count-1);
549 for (j = 1; j < ses->chan_count; j++) {
550 cifs_dump_channel(m, j, &ses->chans[j]);
551 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
552 seq_puts(m, "\tDISCONNECTED ");
553 if (CIFS_CHAN_IN_RECONNECT(ses, j))
554 seq_puts(m, "\t[RECONNECTING] ");
555 }
556 }
557 spin_unlock(&ses->chan_lock);
558
559 seq_puts(m, "\n\n\tShares: ");
560 j = 0;
561
562 seq_printf(m, "\n\t%d) IPC: ", j);
563 if (ses->tcon_ipc)
564 cifs_debug_tcon(m, ses->tcon_ipc);
565 else
566 seq_puts(m, "none\n");
567
568 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
569 ++j;
570 seq_printf(m, "\n\t%d) ", j);
571 cifs_debug_tcon(m, tcon);
572 }
573
574 spin_lock(&ses->iface_lock);
575 if (ses->iface_count)
576 seq_printf(m, "\n\n\tServer interfaces: %zu"
577 "\tLast updated: %lu seconds ago",
578 ses->iface_count,
579 (jiffies - ses->iface_last_update) / HZ);
580
581 last_iface = list_last_entry(&ses->iface_list,
582 struct cifs_server_iface,
583 iface_head);
584 iface_min_speed = last_iface->speed;
585
586 j = 0;
587 list_for_each_entry(iface, &ses->iface_list,
588 iface_head) {
589 seq_printf(m, "\n\t%d)", ++j);
590 cifs_dump_iface(m, iface);
591
592 iface_weight = iface->speed / iface_min_speed;
593 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
594 "\n\t\tAllocated channels: %u\n",
595 iface->weight_fulfilled,
596 iface_weight,
597 iface->num_channels);
598
599 if (is_ses_using_iface(ses, iface))
600 seq_puts(m, "\t\t[CONNECTED]\n");
601 }
602 spin_unlock(&ses->iface_lock);
603
604 seq_puts(m, "\n\n\tMIDs: ");
605 spin_lock(&ses->chan_lock);
606 for (j = 0; j < ses->chan_count; j++) {
607 chan_server = ses->chans[j].server;
608 if (!chan_server)
609 continue;
610
611 if (list_empty(&chan_server->pending_mid_q))
612 continue;
613
614 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
615 chan_server->conn_id);
616 spin_lock(&chan_server->mid_lock);
617 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
618 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
619 mid_entry->mid_state,
620 le16_to_cpu(mid_entry->command),
621 mid_entry->pid,
622 mid_entry->callback_data,
623 mid_entry->mid);
624 }
625 spin_unlock(&chan_server->mid_lock);
626 }
627 spin_unlock(&ses->chan_lock);
628 seq_puts(m, "\n--\n");
629 }
630 if (i == 0)
631 seq_printf(m, "\n\t\t[NONE]");
632 }
633 if (c == 0)
634 seq_printf(m, "\n\t[NONE]");
635
636 spin_unlock(&cifs_tcp_ses_lock);
637 seq_putc(m, '\n');
638 cifs_swn_dump(m);
639
640 /* BB add code to dump additional info such as TCP session info now */
641 return 0;
642 }
643
644 static ssize_t cifs_stats_proc_write(struct file *file,
645 const char __user *buffer, size_t count, loff_t *ppos)
646 {
647 bool bv;
648 int rc;
649 struct TCP_Server_Info *server;
650 struct cifs_ses *ses;
651 struct cifs_tcon *tcon;
652
653 rc = kstrtobool_from_user(buffer, count, &bv);
654 if (rc == 0) {
655 #ifdef CONFIG_CIFS_STATS2
656 int i;
657
658 atomic_set(&total_buf_alloc_count, 0);
659 atomic_set(&total_small_buf_alloc_count, 0);
660 #endif /* CONFIG_CIFS_STATS2 */
661 atomic_set(&tcpSesReconnectCount, 0);
662 atomic_set(&tconInfoReconnectCount, 0);
663
664 spin_lock(&GlobalMid_Lock);
665 GlobalMaxActiveXid = 0;
666 GlobalCurrentXid = 0;
667 spin_unlock(&GlobalMid_Lock);
668 spin_lock(&cifs_tcp_ses_lock);
669 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
670 server->max_in_flight = 0;
671 #ifdef CONFIG_CIFS_STATS2
672 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
673 atomic_set(&server->num_cmds[i], 0);
674 atomic_set(&server->smb2slowcmd[i], 0);
675 server->time_per_cmd[i] = 0;
676 server->slowest_cmd[i] = 0;
677 server->fastest_cmd[0] = 0;
678 }
679 #endif /* CONFIG_CIFS_STATS2 */
680 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
681 if (cifs_ses_exiting(ses))
682 continue;
683 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
684 atomic_set(&tcon->num_smbs_sent, 0);
685 spin_lock(&tcon->stat_lock);
686 tcon->bytes_read = 0;
687 tcon->bytes_written = 0;
688 tcon->stats_from_time = ktime_get_real_seconds();
689 spin_unlock(&tcon->stat_lock);
690 if (server->ops->clear_stats)
691 server->ops->clear_stats(tcon);
692 }
693 }
694 }
695 spin_unlock(&cifs_tcp_ses_lock);
696 } else {
697 return rc;
698 }
699
700 return count;
701 }
702
703 static int cifs_stats_proc_show(struct seq_file *m, void *v)
704 {
705 int i;
706 #ifdef CONFIG_CIFS_STATS2
707 int j;
708 #endif /* STATS2 */
709 struct TCP_Server_Info *server;
710 struct cifs_ses *ses;
711 struct cifs_tcon *tcon;
712
713 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
714 sesInfoAllocCount.counter);
715 seq_printf(m, "Share (unique mount targets): %d\n",
716 tconInfoAllocCount.counter);
717 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
718 buf_alloc_count.counter,
719 cifs_min_rcv + tcpSesAllocCount.counter);
720 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
721 small_buf_alloc_count.counter, cifs_min_small);
722 #ifdef CONFIG_CIFS_STATS2
723 seq_printf(m, "Total Large %d Small %d Allocations\n",
724 atomic_read(&total_buf_alloc_count),
725 atomic_read(&total_small_buf_alloc_count));
726 #endif /* CONFIG_CIFS_STATS2 */
727
728 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
729 seq_printf(m,
730 "\n%d session %d share reconnects\n",
731 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
732
733 seq_printf(m,
734 "Total vfs operations: %d maximum at one time: %d\n",
735 GlobalCurrentXid, GlobalMaxActiveXid);
736
737 i = 0;
738 spin_lock(&cifs_tcp_ses_lock);
739 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
740 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
741 #ifdef CONFIG_CIFS_STATS2
742 seq_puts(m, "\nTotal time spent processing by command. Time ");
743 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
744 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
745 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
746 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
747 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
748 atomic_read(&server->num_cmds[j]),
749 server->time_per_cmd[j],
750 server->fastest_cmd[j],
751 server->slowest_cmd[j]);
752 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
753 if (atomic_read(&server->smb2slowcmd[j])) {
754 spin_lock(&server->srv_lock);
755 seq_printf(m, " %d slow responses from %s for command %d\n",
756 atomic_read(&server->smb2slowcmd[j]),
757 server->hostname, j);
758 spin_unlock(&server->srv_lock);
759 }
760 #endif /* STATS2 */
761 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
762 if (cifs_ses_exiting(ses))
763 continue;
764 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
765 i++;
766 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
767 if (tcon->need_reconnect)
768 seq_puts(m, "\tDISCONNECTED ");
769 seq_printf(m, "\nSMBs: %d since %ptTs UTC",
770 atomic_read(&tcon->num_smbs_sent),
771 &tcon->stats_from_time);
772 if (server->ops->print_stats)
773 server->ops->print_stats(m, tcon);
774 }
775 }
776 }
777 spin_unlock(&cifs_tcp_ses_lock);
778
779 seq_putc(m, '\n');
780 return 0;
781 }
782
783 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
784 {
785 return single_open(file, cifs_stats_proc_show, NULL);
786 }
787
788 static const struct proc_ops cifs_stats_proc_ops = {
789 .proc_open = cifs_stats_proc_open,
790 .proc_read = seq_read,
791 .proc_lseek = seq_lseek,
792 .proc_release = single_release,
793 .proc_write = cifs_stats_proc_write,
794 };
795
796 #ifdef CONFIG_CIFS_SMB_DIRECT
797 #define PROC_FILE_DEFINE(name) \
798 static ssize_t name##_write(struct file *file, const char __user *buffer, \
799 size_t count, loff_t *ppos) \
800 { \
801 int rc; \
802 rc = kstrtoint_from_user(buffer, count, 10, &name); \
803 if (rc) \
804 return rc; \
805 return count; \
806 } \
807 static int name##_proc_show(struct seq_file *m, void *v) \
808 { \
809 seq_printf(m, "%d\n", name); \
810 return 0; \
811 } \
812 static int name##_open(struct inode *inode, struct file *file) \
813 { \
814 return single_open(file, name##_proc_show, NULL); \
815 } \
816 \
817 static const struct proc_ops cifs_##name##_proc_fops = { \
818 .proc_open = name##_open, \
819 .proc_read = seq_read, \
820 .proc_lseek = seq_lseek, \
821 .proc_release = single_release, \
822 .proc_write = name##_write, \
823 }
824
825 PROC_FILE_DEFINE(rdma_readwrite_threshold);
826 PROC_FILE_DEFINE(smbd_max_frmr_depth);
827 PROC_FILE_DEFINE(smbd_keep_alive_interval);
828 PROC_FILE_DEFINE(smbd_max_receive_size);
829 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
830 PROC_FILE_DEFINE(smbd_max_send_size);
831 PROC_FILE_DEFINE(smbd_send_credit_target);
832 PROC_FILE_DEFINE(smbd_receive_credit_max);
833 #endif
834
835 static struct proc_dir_entry *proc_fs_cifs;
836 static const struct proc_ops cifsFYI_proc_ops;
837 static const struct proc_ops cifs_lookup_cache_proc_ops;
838 static const struct proc_ops traceSMB_proc_ops;
839 static const struct proc_ops cifs_security_flags_proc_ops;
840 static const struct proc_ops cifs_linux_ext_proc_ops;
841 static const struct proc_ops cifs_mount_params_proc_ops;
842
843 void
844 cifs_proc_init(void)
845 {
846 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
847 if (proc_fs_cifs == NULL)
848 return;
849
850 proc_create_single("DebugData", 0, proc_fs_cifs,
851 cifs_debug_data_proc_show);
852
853 proc_create_single("open_files", 0400, proc_fs_cifs,
854 cifs_debug_files_proc_show);
855
856 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
857 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
858 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
859 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
860 &cifs_linux_ext_proc_ops);
861 proc_create("SecurityFlags", 0644, proc_fs_cifs,
862 &cifs_security_flags_proc_ops);
863 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
864 &cifs_lookup_cache_proc_ops);
865
866 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
867
868 #ifdef CONFIG_CIFS_DFS_UPCALL
869 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
870 #endif
871
872 #ifdef CONFIG_CIFS_SMB_DIRECT
873 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
874 &cifs_rdma_readwrite_threshold_proc_fops);
875 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
876 &cifs_smbd_max_frmr_depth_proc_fops);
877 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
878 &cifs_smbd_keep_alive_interval_proc_fops);
879 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
880 &cifs_smbd_max_receive_size_proc_fops);
881 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
882 &cifs_smbd_max_fragmented_recv_size_proc_fops);
883 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
884 &cifs_smbd_max_send_size_proc_fops);
885 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
886 &cifs_smbd_send_credit_target_proc_fops);
887 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
888 &cifs_smbd_receive_credit_max_proc_fops);
889 #endif
890 }
891
892 void
893 cifs_proc_clean(void)
894 {
895 if (proc_fs_cifs == NULL)
896 return;
897
898 remove_proc_entry("DebugData", proc_fs_cifs);
899 remove_proc_entry("open_files", proc_fs_cifs);
900 remove_proc_entry("cifsFYI", proc_fs_cifs);
901 remove_proc_entry("traceSMB", proc_fs_cifs);
902 remove_proc_entry("Stats", proc_fs_cifs);
903 remove_proc_entry("SecurityFlags", proc_fs_cifs);
904 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
905 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
906 remove_proc_entry("mount_params", proc_fs_cifs);
907
908 #ifdef CONFIG_CIFS_DFS_UPCALL
909 remove_proc_entry("dfscache", proc_fs_cifs);
910 #endif
911 #ifdef CONFIG_CIFS_SMB_DIRECT
912 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
913 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
914 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
915 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
916 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
917 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
918 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
919 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
920 #endif
921 remove_proc_entry("fs/cifs", NULL);
922 }
923
924 static int cifsFYI_proc_show(struct seq_file *m, void *v)
925 {
926 seq_printf(m, "%d\n", cifsFYI);
927 return 0;
928 }
929
930 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
931 {
932 return single_open(file, cifsFYI_proc_show, NULL);
933 }
934
935 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
936 size_t count, loff_t *ppos)
937 {
938 char c[2] = { '\0' };
939 bool bv;
940 int rc;
941
942 rc = get_user(c[0], buffer);
943 if (rc)
944 return rc;
945 if (kstrtobool(c, &bv) == 0)
946 cifsFYI = bv;
947 else if ((c[0] > '1') && (c[0] <= '9'))
948 cifsFYI = (int) (c[0] - ''); /* see cifs_debug.h for meanings */
949 else
950 return -EINVAL;
951
952 return count;
953 }
954
955 static const struct proc_ops cifsFYI_proc_ops = {
956 .proc_open = cifsFYI_proc_open,
957 .proc_read = seq_read,
958 .proc_lseek = seq_lseek,
959 .proc_release = single_release,
960 .proc_write = cifsFYI_proc_write,
961 };
962
963 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
964 {
965 seq_printf(m, "%d\n", linuxExtEnabled);
966 return 0;
967 }
968
969 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
970 {
971 return single_open(file, cifs_linux_ext_proc_show, NULL);
972 }
973
974 static ssize_t cifs_linux_ext_proc_write(struct file *file,
975 const char __user *buffer, size_t count, loff_t *ppos)
976 {
977 int rc;
978
979 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
980 if (rc)
981 return rc;
982
983 return count;
984 }
985
986 static const struct proc_ops cifs_linux_ext_proc_ops = {
987 .proc_open = cifs_linux_ext_proc_open,
988 .proc_read = seq_read,
989 .proc_lseek = seq_lseek,
990 .proc_release = single_release,
991 .proc_write = cifs_linux_ext_proc_write,
992 };
993
994 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
995 {
996 seq_printf(m, "%d\n", lookupCacheEnabled);
997 return 0;
998 }
999
1000 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
1001 {
1002 return single_open(file, cifs_lookup_cache_proc_show, NULL);
1003 }
1004
1005 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
1006 const char __user *buffer, size_t count, loff_t *ppos)
1007 {
1008 int rc;
1009
1010 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
1011 if (rc)
1012 return rc;
1013
1014 return count;
1015 }
1016
1017 static const struct proc_ops cifs_lookup_cache_proc_ops = {
1018 .proc_open = cifs_lookup_cache_proc_open,
1019 .proc_read = seq_read,
1020 .proc_lseek = seq_lseek,
1021 .proc_release = single_release,
1022 .proc_write = cifs_lookup_cache_proc_write,
1023 };
1024
1025 static int traceSMB_proc_show(struct seq_file *m, void *v)
1026 {
1027 seq_printf(m, "%d\n", traceSMB);
1028 return 0;
1029 }
1030
1031 static int traceSMB_proc_open(struct inode *inode, struct file *file)
1032 {
1033 return single_open(file, traceSMB_proc_show, NULL);
1034 }
1035
1036 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1037 size_t count, loff_t *ppos)
1038 {
1039 int rc;
1040
1041 rc = kstrtobool_from_user(buffer, count, &traceSMB);
1042 if (rc)
1043 return rc;
1044
1045 return count;
1046 }
1047
1048 static const struct proc_ops traceSMB_proc_ops = {
1049 .proc_open = traceSMB_proc_open,
1050 .proc_read = seq_read,
1051 .proc_lseek = seq_lseek,
1052 .proc_release = single_release,
1053 .proc_write = traceSMB_proc_write,
1054 };
1055
1056 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1057 {
1058 seq_printf(m, "0x%x\n", global_secflags);
1059 return 0;
1060 }
1061
1062 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1063 {
1064 return single_open(file, cifs_security_flags_proc_show, NULL);
1065 }
1066
1067 /*
1068 * Ensure that if someone sets a MUST flag, that we disable all other MAY
1069 * flags except for the ones corresponding to the given MUST flag. If there are
1070 * multiple MUST flags, then try to prefer more secure ones.
1071 */
1072 static void
1073 cifs_security_flags_handle_must_flags(unsigned int *flags)
1074 {
1075 unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL);
1076
1077 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1078 *flags = CIFSSEC_MUST_KRB5;
1079 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1080 *flags = CIFSSEC_MUST_NTLMSSP;
1081 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1082 *flags = CIFSSEC_MUST_NTLMV2;
1083
1084 *flags |= signflags;
1085 }
1086
1087 static ssize_t cifs_security_flags_proc_write(struct file *file,
1088 const char __user *buffer, size_t count, loff_t *ppos)
1089 {
1090 int rc;
1091 unsigned int flags;
1092 char flags_string[12];
1093 bool bv;
1094
1095 if ((count < 1) || (count > 11))
1096 return -EINVAL;
1097
1098 memset(flags_string, 0, 12);
1099
1100 if (copy_from_user(flags_string, buffer, count))
1101 return -EFAULT;
1102
1103 if (count < 3) {
1104 /* single char or single char followed by null */
1105 if (kstrtobool(flags_string, &bv) == 0) {
1106 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1107 return count;
1108 } else if (!isdigit(flags_string[0])) {
1109 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1110 flags_string);
1111 return -EINVAL;
1112 }
1113 }
1114
1115 /* else we have a number */
1116 rc = kstrtouint(flags_string, 0, &flags);
1117 if (rc) {
1118 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1119 flags_string);
1120 return rc;
1121 }
1122
1123 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1124
1125 if (flags == 0) {
1126 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1127 return -EINVAL;
1128 }
1129
1130 if (flags & ~CIFSSEC_MASK) {
1131 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1132 flags & ~CIFSSEC_MASK);
1133 return -EINVAL;
1134 }
1135
1136 cifs_security_flags_handle_must_flags(&flags);
1137
1138 /* flags look ok - update the global security flags for cifs module */
1139 global_secflags = flags;
1140 if (global_secflags & CIFSSEC_MUST_SIGN) {
1141 /* requiring signing implies signing is allowed */
1142 global_secflags |= CIFSSEC_MAY_SIGN;
1143 cifs_dbg(FYI, "packet signing now required\n");
1144 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1145 cifs_dbg(FYI, "packet signing disabled\n");
1146 }
1147 /* BB should we turn on MAY flags for other MUST options? */
1148 return count;
1149 }
1150
1151 static const struct proc_ops cifs_security_flags_proc_ops = {
1152 .proc_open = cifs_security_flags_proc_open,
1153 .proc_read = seq_read,
1154 .proc_lseek = seq_lseek,
1155 .proc_release = single_release,
1156 .proc_write = cifs_security_flags_proc_write,
1157 };
1158
1159 /* To make it easier to debug, can help to show mount params */
1160 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1161 {
1162 const struct fs_parameter_spec *p;
1163 const char *type;
1164
1165 for (p = smb3_fs_parameters; p->name; p++) {
1166 /* cannot use switch with pointers... */
1167 if (!p->type) {
1168 if (p->flags == fs_param_neg_with_no)
1169 type = "noflag";
1170 else
1171 type = "flag";
1172 } else if (p->type == fs_param_is_bool)
1173 type = "bool";
1174 else if (p->type == fs_param_is_u32)
1175 type = "u32";
1176 else if (p->type == fs_param_is_u64)
1177 type = "u64";
1178 else if (p->type == fs_param_is_string)
1179 type = "string";
1180 else
1181 type = "unknown";
1182
1183 seq_printf(m, "%s:%s\n", p->name, type);
1184 }
1185
1186 return 0;
1187 }
1188
1189 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1190 {
1191 return single_open(file, cifs_mount_params_proc_show, NULL);
1192 }
1193
1194 static const struct proc_ops cifs_mount_params_proc_ops = {
1195 .proc_open = cifs_mount_params_proc_open,
1196 .proc_read = seq_read,
1197 .proc_lseek = seq_lseek,
1198 .proc_release = single_release,
1199 /* No need for write for now */
1200 /* .proc_write = cifs_mount_params_proc_write, */
1201 };
1202
1203 #else
1204 inline void cifs_proc_init(void)
1205 {
1206 }
1207
1208 inline void cifs_proc_clean(void)
1209 {
1210 }
1211 #endif /* PROC_FS */
1212
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