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
cifs_dump_mem(char * label,void * data,int length)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
cifs_dump_detail(void * buf,struct TCP_Server_Info * server)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\n",
44 smb->Command, smb->Status.CifsError,
45 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
46 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
47 server->ops->calc_smb_size(smb));
48 #endif /* CONFIG_CIFS_DEBUG2 */
49 }
50
cifs_dump_mids(struct TCP_Server_Info * server)51 void cifs_dump_mids(struct TCP_Server_Info *server)
52 {
53 #ifdef CONFIG_CIFS_DEBUG2
54 struct mid_q_entry *mid_entry;
55
56 if (server == NULL)
57 return;
58
59 cifs_dbg(VFS, "Dump pending requests:\n");
60 spin_lock(&server->mid_lock);
61 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
62 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
63 mid_entry->mid_state,
64 le16_to_cpu(mid_entry->command),
65 mid_entry->pid,
66 mid_entry->callback_data,
67 mid_entry->mid);
68 #ifdef CONFIG_CIFS_STATS2
69 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
70 mid_entry->large_buf,
71 mid_entry->resp_buf,
72 mid_entry->when_received,
73 jiffies);
74 #endif /* STATS2 */
75 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
76 mid_entry->multiRsp, mid_entry->multiEnd);
77 if (mid_entry->resp_buf) {
78 cifs_dump_detail(mid_entry->resp_buf, server);
79 cifs_dump_mem("existing buf: ",
80 mid_entry->resp_buf, 62);
81 }
82 }
83 spin_unlock(&server->mid_lock);
84 #endif /* CONFIG_CIFS_DEBUG2 */
85 }
86
87 #ifdef CONFIG_PROC_FS
cifs_debug_tcon(struct seq_file * m,struct cifs_tcon * tcon)88 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
89 {
90 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
91
92 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
93 if (tcon->nativeFileSystem)
94 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
95 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
96 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
97 le32_to_cpu(tcon->fsAttrInfo.Attributes),
98 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
99 tcon->status);
100 if (dev_type == FILE_DEVICE_DISK)
101 seq_puts(m, " type: DISK ");
102 else if (dev_type == FILE_DEVICE_CD_ROM)
103 seq_puts(m, " type: CDROM ");
104 else
105 seq_printf(m, " type: %d ", dev_type);
106
107 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
108
109 if ((tcon->seal) ||
110 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
111 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
112 seq_puts(m, " encrypted");
113 if (tcon->nocase)
114 seq_printf(m, " nocase");
115 if (tcon->unix_ext)
116 seq_printf(m, " POSIX Extensions");
117 if (tcon->ses->server->ops->dump_share_caps)
118 tcon->ses->server->ops->dump_share_caps(m, tcon);
119 if (tcon->use_witness)
120 seq_puts(m, " Witness");
121 if (tcon->broken_sparse_sup)
122 seq_puts(m, " nosparse");
123 if (tcon->need_reconnect)
124 seq_puts(m, "\tDISCONNECTED ");
125 spin_lock(&tcon->tc_lock);
126 if (tcon->origin_fullpath) {
127 seq_printf(m, "\n\tDFS origin fullpath: %s",
128 tcon->origin_fullpath);
129 }
130 spin_unlock(&tcon->tc_lock);
131 seq_putc(m, '\n');
132 }
133
134 static void
cifs_dump_channel(struct seq_file * m,int i,struct cifs_chan * chan)135 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
136 {
137 struct TCP_Server_Info *server = chan->server;
138
139 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
140 "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
141 "\n\t\tTCP status: %d Instance: %d"
142 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
143 "\n\t\tIn Send: %d In MaxReq Wait: %d",
144 i+1, server->conn_id,
145 server->credits,
146 server->echo_credits,
147 server->oplock_credits,
148 server->dialect,
149 server->tcpStatus,
150 server->reconnect_instance,
151 server->srv_count,
152 server->sec_mode,
153 in_flight(server),
154 atomic_read(&server->in_send),
155 atomic_read(&server->num_waiters));
156 #ifdef CONFIG_NET_NS
157 if (server->net)
158 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
159 #endif /* NET_NS */
160
161 }
162
smb_speed_to_str(size_t bps)163 static inline const char *smb_speed_to_str(size_t bps)
164 {
165 size_t mbps = bps / 1000 / 1000;
166
167 switch (mbps) {
168 case SPEED_10:
169 return "10Mbps";
170 case SPEED_100:
171 return "100Mbps";
172 case SPEED_1000:
173 return "1Gbps";
174 case SPEED_2500:
175 return "2.5Gbps";
176 case SPEED_5000:
177 return "5Gbps";
178 case SPEED_10000:
179 return "10Gbps";
180 case SPEED_14000:
181 return "14Gbps";
182 case SPEED_20000:
183 return "20Gbps";
184 case SPEED_25000:
185 return "25Gbps";
186 case SPEED_40000:
187 return "40Gbps";
188 case SPEED_50000:
189 return "50Gbps";
190 case SPEED_56000:
191 return "56Gbps";
192 case SPEED_100000:
193 return "100Gbps";
194 case SPEED_200000:
195 return "200Gbps";
196 case SPEED_400000:
197 return "400Gbps";
198 case SPEED_800000:
199 return "800Gbps";
200 default:
201 return "Unknown";
202 }
203 }
204
205 static void
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)206 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
207 {
208 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
209 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
210
211 seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
212 seq_puts(m, "\t\tCapabilities: ");
213 if (iface->rdma_capable)
214 seq_puts(m, "rdma ");
215 if (iface->rss_capable)
216 seq_puts(m, "rss ");
217 if (!iface->rdma_capable && !iface->rss_capable)
218 seq_puts(m, "None");
219 seq_putc(m, '\n');
220 if (iface->sockaddr.ss_family == AF_INET)
221 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
222 else if (iface->sockaddr.ss_family == AF_INET6)
223 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
224 if (!iface->is_active)
225 seq_puts(m, "\t\t[for-cleanup]\n");
226 }
227
cifs_debug_files_proc_show(struct seq_file * m,void * v)228 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
229 {
230 struct TCP_Server_Info *server;
231 struct cifs_ses *ses;
232 struct cifs_tcon *tcon;
233 struct cifsFileInfo *cfile;
234
235 seq_puts(m, "# Version:1\n");
236 seq_puts(m, "# Format:\n");
237 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
238 #ifdef CONFIG_CIFS_DEBUG2
239 seq_printf(m, " <filename> <mid>\n");
240 #else
241 seq_printf(m, " <filename>\n");
242 #endif /* CIFS_DEBUG2 */
243 spin_lock(&cifs_tcp_ses_lock);
244 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
245 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
246 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
247 spin_lock(&tcon->open_file_lock);
248 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
249 seq_printf(m,
250 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
251 tcon->tid,
252 ses->Suid,
253 cfile->fid.persistent_fid,
254 cfile->f_flags,
255 cfile->count,
256 cfile->pid,
257 from_kuid(&init_user_ns, cfile->uid),
258 cfile->dentry);
259 #ifdef CONFIG_CIFS_DEBUG2
260 seq_printf(m, " %llu\n", cfile->fid.mid);
261 #else
262 seq_printf(m, "\n");
263 #endif /* CIFS_DEBUG2 */
264 }
265 spin_unlock(&tcon->open_file_lock);
266 }
267 }
268 }
269 spin_unlock(&cifs_tcp_ses_lock);
270 seq_putc(m, '\n');
271 return 0;
272 }
273
cifs_debug_data_proc_show(struct seq_file * m,void * v)274 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
275 {
276 struct mid_q_entry *mid_entry;
277 struct TCP_Server_Info *server;
278 struct TCP_Server_Info *chan_server;
279 struct cifs_ses *ses;
280 struct cifs_tcon *tcon;
281 struct cifs_server_iface *iface;
282 int c, i, j;
283
284 seq_puts(m,
285 "Display Internal CIFS Data Structures for Debugging\n"
286 "---------------------------------------------------\n");
287 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
288 seq_printf(m, "Features:");
289 #ifdef CONFIG_CIFS_DFS_UPCALL
290 seq_printf(m, " DFS");
291 #endif
292 #ifdef CONFIG_CIFS_FSCACHE
293 seq_printf(m, ",FSCACHE");
294 #endif
295 #ifdef CONFIG_CIFS_SMB_DIRECT
296 seq_printf(m, ",SMB_DIRECT");
297 #endif
298 #ifdef CONFIG_CIFS_STATS2
299 seq_printf(m, ",STATS2");
300 #else
301 seq_printf(m, ",STATS");
302 #endif
303 #ifdef CONFIG_CIFS_DEBUG2
304 seq_printf(m, ",DEBUG2");
305 #elif defined(CONFIG_CIFS_DEBUG)
306 seq_printf(m, ",DEBUG");
307 #endif
308 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
309 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
310 #endif
311 #ifdef CONFIG_CIFS_POSIX
312 seq_printf(m, ",CIFS_POSIX");
313 #endif
314 #ifdef CONFIG_CIFS_UPCALL
315 seq_printf(m, ",UPCALL(SPNEGO)");
316 #endif
317 #ifdef CONFIG_CIFS_XATTR
318 seq_printf(m, ",XATTR");
319 #endif
320 seq_printf(m, ",ACL");
321 #ifdef CONFIG_CIFS_SWN_UPCALL
322 seq_puts(m, ",WITNESS");
323 #endif
324 seq_putc(m, '\n');
325 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
326 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
327
328 seq_printf(m, "\nServers: ");
329
330 c = 0;
331 spin_lock(&cifs_tcp_ses_lock);
332 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
333 /* channel info will be printed as a part of sessions below */
334 if (SERVER_IS_CHAN(server))
335 continue;
336
337 c++;
338 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
339 c, server->conn_id);
340
341 spin_lock(&server->srv_lock);
342 if (server->hostname)
343 seq_printf(m, "Hostname: %s ", server->hostname);
344 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
345 spin_unlock(&server->srv_lock);
346 #ifdef CONFIG_CIFS_SMB_DIRECT
347 if (!server->rdma)
348 goto skip_rdma;
349
350 if (!server->smbd_conn) {
351 seq_printf(m, "\nSMBDirect transport not available");
352 goto skip_rdma;
353 }
354
355 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
356 "transport status: %x",
357 server->smbd_conn->protocol,
358 server->smbd_conn->transport_status);
359 seq_printf(m, "\nConn receive_credit_max: %x "
360 "send_credit_target: %x max_send_size: %x",
361 server->smbd_conn->receive_credit_max,
362 server->smbd_conn->send_credit_target,
363 server->smbd_conn->max_send_size);
364 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
365 "max_fragmented_send_size: %x max_receive_size:%x",
366 server->smbd_conn->max_fragmented_recv_size,
367 server->smbd_conn->max_fragmented_send_size,
368 server->smbd_conn->max_receive_size);
369 seq_printf(m, "\nConn keep_alive_interval: %x "
370 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
371 server->smbd_conn->keep_alive_interval,
372 server->smbd_conn->max_readwrite_size,
373 server->smbd_conn->rdma_readwrite_threshold);
374 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
375 "count_put_receive_buffer: %x count_send_empty: %x",
376 server->smbd_conn->count_get_receive_buffer,
377 server->smbd_conn->count_put_receive_buffer,
378 server->smbd_conn->count_send_empty);
379 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
380 "count_enqueue_reassembly_queue: %x "
381 "count_dequeue_reassembly_queue: %x "
382 "fragment_reassembly_remaining: %x "
383 "reassembly_data_length: %x "
384 "reassembly_queue_length: %x",
385 server->smbd_conn->count_reassembly_queue,
386 server->smbd_conn->count_enqueue_reassembly_queue,
387 server->smbd_conn->count_dequeue_reassembly_queue,
388 server->smbd_conn->fragment_reassembly_remaining,
389 server->smbd_conn->reassembly_data_length,
390 server->smbd_conn->reassembly_queue_length);
391 seq_printf(m, "\nCurrent Credits send_credits: %x "
392 "receive_credits: %x receive_credit_target: %x",
393 atomic_read(&server->smbd_conn->send_credits),
394 atomic_read(&server->smbd_conn->receive_credits),
395 server->smbd_conn->receive_credit_target);
396 seq_printf(m, "\nPending send_pending: %x ",
397 atomic_read(&server->smbd_conn->send_pending));
398 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
399 "count_empty_packet_queue: %x",
400 server->smbd_conn->count_receive_queue,
401 server->smbd_conn->count_empty_packet_queue);
402 seq_printf(m, "\nMR responder_resources: %x "
403 "max_frmr_depth: %x mr_type: %x",
404 server->smbd_conn->responder_resources,
405 server->smbd_conn->max_frmr_depth,
406 server->smbd_conn->mr_type);
407 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
408 atomic_read(&server->smbd_conn->mr_ready_count),
409 atomic_read(&server->smbd_conn->mr_used_count));
410 skip_rdma:
411 #endif
412 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
413 server->credits,
414 server->echo_credits,
415 server->oplock_credits,
416 server->dialect);
417 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
418 seq_printf(m, " COMPRESS_LZNT1");
419 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
420 seq_printf(m, " COMPRESS_LZ77");
421 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
422 seq_printf(m, " COMPRESS_LZ77_HUFF");
423 if (server->sign)
424 seq_printf(m, " signed");
425 if (server->posix_ext_supported)
426 seq_printf(m, " posix");
427 if (server->nosharesock)
428 seq_printf(m, " nosharesock");
429
430 if (server->rdma)
431 seq_printf(m, "\nRDMA ");
432 seq_printf(m, "\nTCP status: %d Instance: %d"
433 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
434 server->tcpStatus,
435 server->reconnect_instance,
436 server->srv_count,
437 server->sec_mode, in_flight(server));
438 #ifdef CONFIG_NET_NS
439 if (server->net)
440 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
441 #endif /* NET_NS */
442
443 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
444 atomic_read(&server->in_send),
445 atomic_read(&server->num_waiters));
446
447 if (server->leaf_fullpath) {
448 seq_printf(m, "\nDFS leaf full path: %s",
449 server->leaf_fullpath);
450 }
451
452 seq_printf(m, "\n\n\tSessions: ");
453 i = 0;
454 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
455 i++;
456 if ((ses->serverDomain == NULL) ||
457 (ses->serverOS == NULL) ||
458 (ses->serverNOS == NULL)) {
459 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
460 i, ses->ip_addr, ses->ses_count,
461 ses->capabilities, ses->ses_status);
462 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
463 seq_printf(m, "Guest ");
464 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
465 seq_printf(m, "Anonymous ");
466 } else {
467 seq_printf(m,
468 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
469 "\n\tNOS: %s\tCapability: 0x%x"
470 "\n\tSMB session status: %d ",
471 i, ses->ip_addr, ses->serverDomain,
472 ses->ses_count, ses->serverOS, ses->serverNOS,
473 ses->capabilities, ses->ses_status);
474 }
475
476 seq_printf(m, "\n\tSecurity type: %s ",
477 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
478
479 /* dump session id helpful for use with network trace */
480 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
481 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
482 seq_puts(m, " encrypted");
483 /* can help in debugging to show encryption type */
484 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
485 seq_puts(m, "(gcm256)");
486 }
487 if (ses->sign)
488 seq_puts(m, " signed");
489
490 seq_printf(m, "\n\tUser: %d Cred User: %d",
491 from_kuid(&init_user_ns, ses->linux_uid),
492 from_kuid(&init_user_ns, ses->cred_uid));
493
494 if (ses->dfs_root_ses) {
495 seq_printf(m, "\n\tDFS root session id: 0x%llx",
496 ses->dfs_root_ses->Suid);
497 }
498
499 spin_lock(&ses->chan_lock);
500 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
501 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
502 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
503 seq_puts(m, "\t[RECONNECTING] ");
504
505 if (ses->chan_count > 1) {
506 seq_printf(m, "\n\n\tExtra Channels: %zu ",
507 ses->chan_count-1);
508 for (j = 1; j < ses->chan_count; j++) {
509 cifs_dump_channel(m, j, &ses->chans[j]);
510 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
511 seq_puts(m, "\tDISCONNECTED ");
512 if (CIFS_CHAN_IN_RECONNECT(ses, j))
513 seq_puts(m, "\t[RECONNECTING] ");
514 }
515 }
516 spin_unlock(&ses->chan_lock);
517
518 seq_puts(m, "\n\n\tShares: ");
519 j = 0;
520
521 seq_printf(m, "\n\t%d) IPC: ", j);
522 if (ses->tcon_ipc)
523 cifs_debug_tcon(m, ses->tcon_ipc);
524 else
525 seq_puts(m, "none\n");
526
527 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
528 ++j;
529 seq_printf(m, "\n\t%d) ", j);
530 cifs_debug_tcon(m, tcon);
531 }
532
533 spin_lock(&ses->iface_lock);
534 if (ses->iface_count)
535 seq_printf(m, "\n\n\tServer interfaces: %zu"
536 "\tLast updated: %lu seconds ago",
537 ses->iface_count,
538 (jiffies - ses->iface_last_update) / HZ);
539 j = 0;
540 list_for_each_entry(iface, &ses->iface_list,
541 iface_head) {
542 seq_printf(m, "\n\t%d)", ++j);
543 cifs_dump_iface(m, iface);
544 if (is_ses_using_iface(ses, iface))
545 seq_puts(m, "\t\t[CONNECTED]\n");
546 }
547 spin_unlock(&ses->iface_lock);
548
549 seq_puts(m, "\n\n\tMIDs: ");
550 spin_lock(&ses->chan_lock);
551 for (j = 0; j < ses->chan_count; j++) {
552 chan_server = ses->chans[j].server;
553 if (!chan_server)
554 continue;
555
556 if (list_empty(&chan_server->pending_mid_q))
557 continue;
558
559 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
560 chan_server->conn_id);
561 spin_lock(&chan_server->mid_lock);
562 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
563 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
564 mid_entry->mid_state,
565 le16_to_cpu(mid_entry->command),
566 mid_entry->pid,
567 mid_entry->callback_data,
568 mid_entry->mid);
569 }
570 spin_unlock(&chan_server->mid_lock);
571 }
572 spin_unlock(&ses->chan_lock);
573 seq_puts(m, "\n--\n");
574 }
575 if (i == 0)
576 seq_printf(m, "\n\t\t[NONE]");
577 }
578 if (c == 0)
579 seq_printf(m, "\n\t[NONE]");
580
581 spin_unlock(&cifs_tcp_ses_lock);
582 seq_putc(m, '\n');
583 cifs_swn_dump(m);
584
585 /* BB add code to dump additional info such as TCP session info now */
586 return 0;
587 }
588
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)589 static ssize_t cifs_stats_proc_write(struct file *file,
590 const char __user *buffer, size_t count, loff_t *ppos)
591 {
592 bool bv;
593 int rc;
594 struct TCP_Server_Info *server;
595 struct cifs_ses *ses;
596 struct cifs_tcon *tcon;
597
598 rc = kstrtobool_from_user(buffer, count, &bv);
599 if (rc == 0) {
600 #ifdef CONFIG_CIFS_STATS2
601 int i;
602
603 atomic_set(&total_buf_alloc_count, 0);
604 atomic_set(&total_small_buf_alloc_count, 0);
605 #endif /* CONFIG_CIFS_STATS2 */
606 atomic_set(&tcpSesReconnectCount, 0);
607 atomic_set(&tconInfoReconnectCount, 0);
608
609 spin_lock(&GlobalMid_Lock);
610 GlobalMaxActiveXid = 0;
611 GlobalCurrentXid = 0;
612 spin_unlock(&GlobalMid_Lock);
613 spin_lock(&cifs_tcp_ses_lock);
614 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
615 server->max_in_flight = 0;
616 #ifdef CONFIG_CIFS_STATS2
617 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
618 atomic_set(&server->num_cmds[i], 0);
619 atomic_set(&server->smb2slowcmd[i], 0);
620 server->time_per_cmd[i] = 0;
621 server->slowest_cmd[i] = 0;
622 server->fastest_cmd[0] = 0;
623 }
624 #endif /* CONFIG_CIFS_STATS2 */
625 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
626 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
627 atomic_set(&tcon->num_smbs_sent, 0);
628 spin_lock(&tcon->stat_lock);
629 tcon->bytes_read = 0;
630 tcon->bytes_written = 0;
631 spin_unlock(&tcon->stat_lock);
632 if (server->ops->clear_stats)
633 server->ops->clear_stats(tcon);
634 }
635 }
636 }
637 spin_unlock(&cifs_tcp_ses_lock);
638 } else {
639 return rc;
640 }
641
642 return count;
643 }
644
cifs_stats_proc_show(struct seq_file * m,void * v)645 static int cifs_stats_proc_show(struct seq_file *m, void *v)
646 {
647 int i;
648 #ifdef CONFIG_CIFS_STATS2
649 int j;
650 #endif /* STATS2 */
651 struct TCP_Server_Info *server;
652 struct cifs_ses *ses;
653 struct cifs_tcon *tcon;
654
655 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
656 sesInfoAllocCount.counter);
657 seq_printf(m, "Share (unique mount targets): %d\n",
658 tconInfoAllocCount.counter);
659 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
660 buf_alloc_count.counter,
661 cifs_min_rcv + tcpSesAllocCount.counter);
662 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
663 small_buf_alloc_count.counter, cifs_min_small);
664 #ifdef CONFIG_CIFS_STATS2
665 seq_printf(m, "Total Large %d Small %d Allocations\n",
666 atomic_read(&total_buf_alloc_count),
667 atomic_read(&total_small_buf_alloc_count));
668 #endif /* CONFIG_CIFS_STATS2 */
669
670 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
671 seq_printf(m,
672 "\n%d session %d share reconnects\n",
673 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
674
675 seq_printf(m,
676 "Total vfs operations: %d maximum at one time: %d\n",
677 GlobalCurrentXid, GlobalMaxActiveXid);
678
679 i = 0;
680 spin_lock(&cifs_tcp_ses_lock);
681 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
682 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
683 #ifdef CONFIG_CIFS_STATS2
684 seq_puts(m, "\nTotal time spent processing by command. Time ");
685 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
686 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
687 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
688 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
689 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
690 atomic_read(&server->num_cmds[j]),
691 server->time_per_cmd[j],
692 server->fastest_cmd[j],
693 server->slowest_cmd[j]);
694 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
695 if (atomic_read(&server->smb2slowcmd[j])) {
696 spin_lock(&server->srv_lock);
697 seq_printf(m, " %d slow responses from %s for command %d\n",
698 atomic_read(&server->smb2slowcmd[j]),
699 server->hostname, j);
700 spin_unlock(&server->srv_lock);
701 }
702 #endif /* STATS2 */
703 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
704 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
705 i++;
706 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
707 if (tcon->need_reconnect)
708 seq_puts(m, "\tDISCONNECTED ");
709 seq_printf(m, "\nSMBs: %d",
710 atomic_read(&tcon->num_smbs_sent));
711 if (server->ops->print_stats)
712 server->ops->print_stats(m, tcon);
713 }
714 }
715 }
716 spin_unlock(&cifs_tcp_ses_lock);
717
718 seq_putc(m, '\n');
719 return 0;
720 }
721
cifs_stats_proc_open(struct inode * inode,struct file * file)722 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
723 {
724 return single_open(file, cifs_stats_proc_show, NULL);
725 }
726
727 static const struct proc_ops cifs_stats_proc_ops = {
728 .proc_open = cifs_stats_proc_open,
729 .proc_read = seq_read,
730 .proc_lseek = seq_lseek,
731 .proc_release = single_release,
732 .proc_write = cifs_stats_proc_write,
733 };
734
735 #ifdef CONFIG_CIFS_SMB_DIRECT
736 #define PROC_FILE_DEFINE(name) \
737 static ssize_t name##_write(struct file *file, const char __user *buffer, \
738 size_t count, loff_t *ppos) \
739 { \
740 int rc; \
741 rc = kstrtoint_from_user(buffer, count, 10, & name); \
742 if (rc) \
743 return rc; \
744 return count; \
745 } \
746 static int name##_proc_show(struct seq_file *m, void *v) \
747 { \
748 seq_printf(m, "%d\n", name ); \
749 return 0; \
750 } \
751 static int name##_open(struct inode *inode, struct file *file) \
752 { \
753 return single_open(file, name##_proc_show, NULL); \
754 } \
755 \
756 static const struct proc_ops cifs_##name##_proc_fops = { \
757 .proc_open = name##_open, \
758 .proc_read = seq_read, \
759 .proc_lseek = seq_lseek, \
760 .proc_release = single_release, \
761 .proc_write = name##_write, \
762 }
763
764 PROC_FILE_DEFINE(rdma_readwrite_threshold);
765 PROC_FILE_DEFINE(smbd_max_frmr_depth);
766 PROC_FILE_DEFINE(smbd_keep_alive_interval);
767 PROC_FILE_DEFINE(smbd_max_receive_size);
768 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
769 PROC_FILE_DEFINE(smbd_max_send_size);
770 PROC_FILE_DEFINE(smbd_send_credit_target);
771 PROC_FILE_DEFINE(smbd_receive_credit_max);
772 #endif
773
774 static struct proc_dir_entry *proc_fs_cifs;
775 static const struct proc_ops cifsFYI_proc_ops;
776 static const struct proc_ops cifs_lookup_cache_proc_ops;
777 static const struct proc_ops traceSMB_proc_ops;
778 static const struct proc_ops cifs_security_flags_proc_ops;
779 static const struct proc_ops cifs_linux_ext_proc_ops;
780 static const struct proc_ops cifs_mount_params_proc_ops;
781
782 void
cifs_proc_init(void)783 cifs_proc_init(void)
784 {
785 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
786 if (proc_fs_cifs == NULL)
787 return;
788
789 proc_create_single("DebugData", 0, proc_fs_cifs,
790 cifs_debug_data_proc_show);
791
792 proc_create_single("open_files", 0400, proc_fs_cifs,
793 cifs_debug_files_proc_show);
794
795 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
796 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
797 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
798 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
799 &cifs_linux_ext_proc_ops);
800 proc_create("SecurityFlags", 0644, proc_fs_cifs,
801 &cifs_security_flags_proc_ops);
802 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
803 &cifs_lookup_cache_proc_ops);
804
805 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
806
807 #ifdef CONFIG_CIFS_DFS_UPCALL
808 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
809 #endif
810
811 #ifdef CONFIG_CIFS_SMB_DIRECT
812 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
813 &cifs_rdma_readwrite_threshold_proc_fops);
814 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
815 &cifs_smbd_max_frmr_depth_proc_fops);
816 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
817 &cifs_smbd_keep_alive_interval_proc_fops);
818 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
819 &cifs_smbd_max_receive_size_proc_fops);
820 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
821 &cifs_smbd_max_fragmented_recv_size_proc_fops);
822 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
823 &cifs_smbd_max_send_size_proc_fops);
824 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
825 &cifs_smbd_send_credit_target_proc_fops);
826 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
827 &cifs_smbd_receive_credit_max_proc_fops);
828 #endif
829 }
830
831 void
cifs_proc_clean(void)832 cifs_proc_clean(void)
833 {
834 if (proc_fs_cifs == NULL)
835 return;
836
837 remove_proc_entry("DebugData", proc_fs_cifs);
838 remove_proc_entry("open_files", proc_fs_cifs);
839 remove_proc_entry("cifsFYI", proc_fs_cifs);
840 remove_proc_entry("traceSMB", proc_fs_cifs);
841 remove_proc_entry("Stats", proc_fs_cifs);
842 remove_proc_entry("SecurityFlags", proc_fs_cifs);
843 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
844 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
845 remove_proc_entry("mount_params", proc_fs_cifs);
846
847 #ifdef CONFIG_CIFS_DFS_UPCALL
848 remove_proc_entry("dfscache", proc_fs_cifs);
849 #endif
850 #ifdef CONFIG_CIFS_SMB_DIRECT
851 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
852 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
853 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
854 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
855 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
856 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
857 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
858 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
859 #endif
860 remove_proc_entry("fs/cifs", NULL);
861 }
862
cifsFYI_proc_show(struct seq_file * m,void * v)863 static int cifsFYI_proc_show(struct seq_file *m, void *v)
864 {
865 seq_printf(m, "%d\n", cifsFYI);
866 return 0;
867 }
868
cifsFYI_proc_open(struct inode * inode,struct file * file)869 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
870 {
871 return single_open(file, cifsFYI_proc_show, NULL);
872 }
873
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)874 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
875 size_t count, loff_t *ppos)
876 {
877 char c[2] = { '\0' };
878 bool bv;
879 int rc;
880
881 rc = get_user(c[0], buffer);
882 if (rc)
883 return rc;
884 if (kstrtobool(c, &bv) == 0)
885 cifsFYI = bv;
886 else if ((c[0] > '1') && (c[0] <= '9'))
887 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
888 else
889 return -EINVAL;
890
891 return count;
892 }
893
894 static const struct proc_ops cifsFYI_proc_ops = {
895 .proc_open = cifsFYI_proc_open,
896 .proc_read = seq_read,
897 .proc_lseek = seq_lseek,
898 .proc_release = single_release,
899 .proc_write = cifsFYI_proc_write,
900 };
901
cifs_linux_ext_proc_show(struct seq_file * m,void * v)902 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
903 {
904 seq_printf(m, "%d\n", linuxExtEnabled);
905 return 0;
906 }
907
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)908 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
909 {
910 return single_open(file, cifs_linux_ext_proc_show, NULL);
911 }
912
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)913 static ssize_t cifs_linux_ext_proc_write(struct file *file,
914 const char __user *buffer, size_t count, loff_t *ppos)
915 {
916 int rc;
917
918 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
919 if (rc)
920 return rc;
921
922 return count;
923 }
924
925 static const struct proc_ops cifs_linux_ext_proc_ops = {
926 .proc_open = cifs_linux_ext_proc_open,
927 .proc_read = seq_read,
928 .proc_lseek = seq_lseek,
929 .proc_release = single_release,
930 .proc_write = cifs_linux_ext_proc_write,
931 };
932
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)933 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
934 {
935 seq_printf(m, "%d\n", lookupCacheEnabled);
936 return 0;
937 }
938
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)939 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
940 {
941 return single_open(file, cifs_lookup_cache_proc_show, NULL);
942 }
943
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)944 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
945 const char __user *buffer, size_t count, loff_t *ppos)
946 {
947 int rc;
948
949 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
950 if (rc)
951 return rc;
952
953 return count;
954 }
955
956 static const struct proc_ops cifs_lookup_cache_proc_ops = {
957 .proc_open = cifs_lookup_cache_proc_open,
958 .proc_read = seq_read,
959 .proc_lseek = seq_lseek,
960 .proc_release = single_release,
961 .proc_write = cifs_lookup_cache_proc_write,
962 };
963
traceSMB_proc_show(struct seq_file * m,void * v)964 static int traceSMB_proc_show(struct seq_file *m, void *v)
965 {
966 seq_printf(m, "%d\n", traceSMB);
967 return 0;
968 }
969
traceSMB_proc_open(struct inode * inode,struct file * file)970 static int traceSMB_proc_open(struct inode *inode, struct file *file)
971 {
972 return single_open(file, traceSMB_proc_show, NULL);
973 }
974
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)975 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
976 size_t count, loff_t *ppos)
977 {
978 int rc;
979
980 rc = kstrtobool_from_user(buffer, count, &traceSMB);
981 if (rc)
982 return rc;
983
984 return count;
985 }
986
987 static const struct proc_ops traceSMB_proc_ops = {
988 .proc_open = traceSMB_proc_open,
989 .proc_read = seq_read,
990 .proc_lseek = seq_lseek,
991 .proc_release = single_release,
992 .proc_write = traceSMB_proc_write,
993 };
994
cifs_security_flags_proc_show(struct seq_file * m,void * v)995 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
996 {
997 seq_printf(m, "0x%x\n", global_secflags);
998 return 0;
999 }
1000
cifs_security_flags_proc_open(struct inode * inode,struct file * file)1001 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1002 {
1003 return single_open(file, cifs_security_flags_proc_show, NULL);
1004 }
1005
1006 /*
1007 * Ensure that if someone sets a MUST flag, that we disable all other MAY
1008 * flags except for the ones corresponding to the given MUST flag. If there are
1009 * multiple MUST flags, then try to prefer more secure ones.
1010 */
1011 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)1012 cifs_security_flags_handle_must_flags(unsigned int *flags)
1013 {
1014 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
1015
1016 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1017 *flags = CIFSSEC_MUST_KRB5;
1018 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1019 *flags = CIFSSEC_MUST_NTLMSSP;
1020 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1021 *flags = CIFSSEC_MUST_NTLMV2;
1022
1023 *flags |= signflags;
1024 }
1025
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1026 static ssize_t cifs_security_flags_proc_write(struct file *file,
1027 const char __user *buffer, size_t count, loff_t *ppos)
1028 {
1029 int rc;
1030 unsigned int flags;
1031 char flags_string[12];
1032 bool bv;
1033
1034 if ((count < 1) || (count > 11))
1035 return -EINVAL;
1036
1037 memset(flags_string, 0, 12);
1038
1039 if (copy_from_user(flags_string, buffer, count))
1040 return -EFAULT;
1041
1042 if (count < 3) {
1043 /* single char or single char followed by null */
1044 if (kstrtobool(flags_string, &bv) == 0) {
1045 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1046 return count;
1047 } else if (!isdigit(flags_string[0])) {
1048 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1049 flags_string);
1050 return -EINVAL;
1051 }
1052 }
1053
1054 /* else we have a number */
1055 rc = kstrtouint(flags_string, 0, &flags);
1056 if (rc) {
1057 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1058 flags_string);
1059 return rc;
1060 }
1061
1062 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1063
1064 if (flags == 0) {
1065 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1066 return -EINVAL;
1067 }
1068
1069 if (flags & ~CIFSSEC_MASK) {
1070 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1071 flags & ~CIFSSEC_MASK);
1072 return -EINVAL;
1073 }
1074
1075 cifs_security_flags_handle_must_flags(&flags);
1076
1077 /* flags look ok - update the global security flags for cifs module */
1078 global_secflags = flags;
1079 if (global_secflags & CIFSSEC_MUST_SIGN) {
1080 /* requiring signing implies signing is allowed */
1081 global_secflags |= CIFSSEC_MAY_SIGN;
1082 cifs_dbg(FYI, "packet signing now required\n");
1083 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1084 cifs_dbg(FYI, "packet signing disabled\n");
1085 }
1086 /* BB should we turn on MAY flags for other MUST options? */
1087 return count;
1088 }
1089
1090 static const struct proc_ops cifs_security_flags_proc_ops = {
1091 .proc_open = cifs_security_flags_proc_open,
1092 .proc_read = seq_read,
1093 .proc_lseek = seq_lseek,
1094 .proc_release = single_release,
1095 .proc_write = cifs_security_flags_proc_write,
1096 };
1097
1098 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file * m,void * v)1099 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1100 {
1101 const struct fs_parameter_spec *p;
1102 const char *type;
1103
1104 for (p = smb3_fs_parameters; p->name; p++) {
1105 /* cannot use switch with pointers... */
1106 if (!p->type) {
1107 if (p->flags == fs_param_neg_with_no)
1108 type = "noflag";
1109 else
1110 type = "flag";
1111 } else if (p->type == fs_param_is_bool)
1112 type = "bool";
1113 else if (p->type == fs_param_is_u32)
1114 type = "u32";
1115 else if (p->type == fs_param_is_u64)
1116 type = "u64";
1117 else if (p->type == fs_param_is_string)
1118 type = "string";
1119 else
1120 type = "unknown";
1121
1122 seq_printf(m, "%s:%s\n", p->name, type);
1123 }
1124
1125 return 0;
1126 }
1127
cifs_mount_params_proc_open(struct inode * inode,struct file * file)1128 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1129 {
1130 return single_open(file, cifs_mount_params_proc_show, NULL);
1131 }
1132
1133 static const struct proc_ops cifs_mount_params_proc_ops = {
1134 .proc_open = cifs_mount_params_proc_open,
1135 .proc_read = seq_read,
1136 .proc_lseek = seq_lseek,
1137 .proc_release = single_release,
1138 /* No need for write for now */
1139 /* .proc_write = cifs_mount_params_proc_write, */
1140 };
1141
1142 #else
cifs_proc_init(void)1143 inline void cifs_proc_init(void)
1144 {
1145 }
1146
cifs_proc_clean(void)1147 inline void cifs_proc_clean(void)
1148 {
1149 }
1150 #endif /* PROC_FS */
1151
