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 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
cifs_dump_mids(struct TCP_Server_Info *server)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
cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)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
cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)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
smb_speed_to_str(size_t bps)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
cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)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
cifs_debug_files_proc_show(struct seq_file *m, void *v)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 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
254 spin_lock(&tcon->open_file_lock);
255 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
256 seq_printf(m,
257 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
258 tcon->tid,
259 ses->Suid,
260 cfile->fid.persistent_fid,
261 cfile->f_flags,
262 cfile->count,
263 cfile->pid,
264 from_kuid(&init_user_ns, cfile->uid),
265 cfile->dentry);
266 #ifdef CONFIG_CIFS_DEBUG2
267 seq_printf(m, " %llu\n", cfile->fid.mid);
268 #else
269 seq_printf(m, "\n");
270 #endif /* CIFS_DEBUG2 */
271 }
272 spin_unlock(&tcon->open_file_lock);
273 }
274 }
275 }
276 spin_unlock(&cifs_tcp_ses_lock);
277 seq_putc(m, '\n');
278 return 0;
279 }
280
cifs_debug_data_proc_show(struct seq_file *m, void *v)281 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
282 {
283 struct mid_q_entry *mid_entry;
284 struct TCP_Server_Info *server;
285 struct TCP_Server_Info *chan_server;
286 struct cifs_ses *ses;
287 struct cifs_tcon *tcon;
288 struct cifs_server_iface *iface;
289 size_t iface_weight = 0, iface_min_speed = 0;
290 struct cifs_server_iface *last_iface = NULL;
291 int c, i, j;
292
293 seq_puts(m,
294 "Display Internal CIFS Data Structures for Debugging\n"
295 "---------------------------------------------------\n");
296 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
297 seq_printf(m, "Features:");
298 #ifdef CONFIG_CIFS_DFS_UPCALL
299 seq_printf(m, " DFS");
300 #endif
301 #ifdef CONFIG_CIFS_FSCACHE
302 seq_printf(m, ",FSCACHE");
303 #endif
304 #ifdef CONFIG_CIFS_SMB_DIRECT
305 seq_printf(m, ",SMB_DIRECT");
306 #endif
307 #ifdef CONFIG_CIFS_STATS2
308 seq_printf(m, ",STATS2");
309 #else
310 seq_printf(m, ",STATS");
311 #endif
312 #ifdef CONFIG_CIFS_DEBUG2
313 seq_printf(m, ",DEBUG2");
314 #elif defined(CONFIG_CIFS_DEBUG)
315 seq_printf(m, ",DEBUG");
316 #endif
317 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
318 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
319 #endif
320 #ifdef CONFIG_CIFS_POSIX
321 seq_printf(m, ",CIFS_POSIX");
322 #endif
323 #ifdef CONFIG_CIFS_UPCALL
324 seq_printf(m, ",UPCALL(SPNEGO)");
325 #endif
326 #ifdef CONFIG_CIFS_XATTR
327 seq_printf(m, ",XATTR");
328 #endif
329 seq_printf(m, ",ACL");
330 #ifdef CONFIG_CIFS_SWN_UPCALL
331 seq_puts(m, ",WITNESS");
332 #endif
333 seq_putc(m, '\n');
334 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
335 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
336
337 seq_printf(m, "\nServers: ");
338
339 c = 0;
340 spin_lock(&cifs_tcp_ses_lock);
341 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
342 /* channel info will be printed as a part of sessions below */
343 if (SERVER_IS_CHAN(server))
344 continue;
345
346 c++;
347 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
348 c, server->conn_id);
349
350 spin_lock(&server->srv_lock);
351 if (server->hostname)
352 seq_printf(m, "Hostname: %s ", server->hostname);
353 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
354 spin_unlock(&server->srv_lock);
355 #ifdef CONFIG_CIFS_SMB_DIRECT
356 if (!server->rdma)
357 goto skip_rdma;
358
359 if (!server->smbd_conn) {
360 seq_printf(m, "\nSMBDirect transport not available");
361 goto skip_rdma;
362 }
363
364 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
365 "transport status: %x",
366 server->smbd_conn->protocol,
367 server->smbd_conn->transport_status);
368 seq_printf(m, "\nConn receive_credit_max: %x "
369 "send_credit_target: %x max_send_size: %x",
370 server->smbd_conn->receive_credit_max,
371 server->smbd_conn->send_credit_target,
372 server->smbd_conn->max_send_size);
373 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
374 "max_fragmented_send_size: %x max_receive_size:%x",
375 server->smbd_conn->max_fragmented_recv_size,
376 server->smbd_conn->max_fragmented_send_size,
377 server->smbd_conn->max_receive_size);
378 seq_printf(m, "\nConn keep_alive_interval: %x "
379 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
380 server->smbd_conn->keep_alive_interval,
381 server->smbd_conn->max_readwrite_size,
382 server->smbd_conn->rdma_readwrite_threshold);
383 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
384 "count_put_receive_buffer: %x count_send_empty: %x",
385 server->smbd_conn->count_get_receive_buffer,
386 server->smbd_conn->count_put_receive_buffer,
387 server->smbd_conn->count_send_empty);
388 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
389 "count_enqueue_reassembly_queue: %x "
390 "count_dequeue_reassembly_queue: %x "
391 "fragment_reassembly_remaining: %x "
392 "reassembly_data_length: %x "
393 "reassembly_queue_length: %x",
394 server->smbd_conn->count_reassembly_queue,
395 server->smbd_conn->count_enqueue_reassembly_queue,
396 server->smbd_conn->count_dequeue_reassembly_queue,
397 server->smbd_conn->fragment_reassembly_remaining,
398 server->smbd_conn->reassembly_data_length,
399 server->smbd_conn->reassembly_queue_length);
400 seq_printf(m, "\nCurrent Credits send_credits: %x "
401 "receive_credits: %x receive_credit_target: %x",
402 atomic_read(&server->smbd_conn->send_credits),
403 atomic_read(&server->smbd_conn->receive_credits),
404 server->smbd_conn->receive_credit_target);
405 seq_printf(m, "\nPending send_pending: %x ",
406 atomic_read(&server->smbd_conn->send_pending));
407 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
408 "count_empty_packet_queue: %x",
409 server->smbd_conn->count_receive_queue,
410 server->smbd_conn->count_empty_packet_queue);
411 seq_printf(m, "\nMR responder_resources: %x "
412 "max_frmr_depth: %x mr_type: %x",
413 server->smbd_conn->responder_resources,
414 server->smbd_conn->max_frmr_depth,
415 server->smbd_conn->mr_type);
416 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
417 atomic_read(&server->smbd_conn->mr_ready_count),
418 atomic_read(&server->smbd_conn->mr_used_count));
419 skip_rdma:
420 #endif
421 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
422 server->credits,
423 server->echo_credits,
424 server->oplock_credits,
425 server->dialect);
426 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
427 seq_printf(m, " COMPRESS_LZNT1");
428 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
429 seq_printf(m, " COMPRESS_LZ77");
430 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
431 seq_printf(m, " COMPRESS_LZ77_HUFF");
432 if (server->sign)
433 seq_printf(m, " signed");
434 if (server->posix_ext_supported)
435 seq_printf(m, " posix");
436 if (server->nosharesock)
437 seq_printf(m, " nosharesock");
438
439 if (server->rdma)
440 seq_printf(m, "\nRDMA ");
441 seq_printf(m, "\nTCP status: %d Instance: %d"
442 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
443 server->tcpStatus,
444 server->reconnect_instance,
445 server->srv_count,
446 server->sec_mode, in_flight(server));
447 #ifdef CONFIG_NET_NS
448 if (server->net)
449 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
450 #endif /* NET_NS */
451
452 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
453 atomic_read(&server->in_send),
454 atomic_read(&server->num_waiters));
455
456 if (server->leaf_fullpath) {
457 seq_printf(m, "\nDFS leaf full path: %s",
458 server->leaf_fullpath);
459 }
460
461 seq_printf(m, "\n\n\tSessions: ");
462 i = 0;
463 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
464 spin_lock(&ses->ses_lock);
465 if (ses->ses_status == SES_EXITING) {
466 spin_unlock(&ses->ses_lock);
467 continue;
468 }
469 i++;
470 if ((ses->serverDomain == NULL) ||
471 (ses->serverOS == NULL) ||
472 (ses->serverNOS == NULL)) {
473 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
474 i, ses->ip_addr, ses->ses_count,
475 ses->capabilities, ses->ses_status);
476 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
477 seq_printf(m, "Guest ");
478 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
479 seq_printf(m, "Anonymous ");
480 } else {
481 seq_printf(m,
482 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
483 "\n\tNOS: %s\tCapability: 0x%x"
484 "\n\tSMB session status: %d ",
485 i, ses->ip_addr, ses->serverDomain,
486 ses->ses_count, ses->serverOS, ses->serverNOS,
487 ses->capabilities, ses->ses_status);
488 }
489 if (ses->expired_pwd)
490 seq_puts(m, "password no longer valid ");
491 spin_unlock(&ses->ses_lock);
492
493 seq_printf(m, "\n\tSecurity type: %s ",
494 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
495
496 /* dump session id helpful for use with network trace */
497 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
498 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
499 seq_puts(m, " encrypted");
500 /* can help in debugging to show encryption type */
501 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
502 seq_puts(m, "(gcm256)");
503 }
504 if (ses->sign)
505 seq_puts(m, " signed");
506
507 seq_printf(m, "\n\tUser: %d Cred User: %d",
508 from_kuid(&init_user_ns, ses->linux_uid),
509 from_kuid(&init_user_ns, ses->cred_uid));
510
511 if (ses->dfs_root_ses) {
512 seq_printf(m, "\n\tDFS root session id: 0x%llx",
513 ses->dfs_root_ses->Suid);
514 }
515
516 spin_lock(&ses->chan_lock);
517 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
518 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
519 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
520 seq_puts(m, "\t[RECONNECTING] ");
521
522 if (ses->chan_count > 1) {
523 seq_printf(m, "\n\n\tExtra Channels: %zu ",
524 ses->chan_count-1);
525 for (j = 1; j < ses->chan_count; j++) {
526 cifs_dump_channel(m, j, &ses->chans[j]);
527 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
528 seq_puts(m, "\tDISCONNECTED ");
529 if (CIFS_CHAN_IN_RECONNECT(ses, j))
530 seq_puts(m, "\t[RECONNECTING] ");
531 }
532 }
533 spin_unlock(&ses->chan_lock);
534
535 seq_puts(m, "\n\n\tShares: ");
536 j = 0;
537
538 seq_printf(m, "\n\t%d) IPC: ", j);
539 if (ses->tcon_ipc)
540 cifs_debug_tcon(m, ses->tcon_ipc);
541 else
542 seq_puts(m, "none\n");
543
544 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
545 ++j;
546 seq_printf(m, "\n\t%d) ", j);
547 cifs_debug_tcon(m, tcon);
548 }
549
550 spin_lock(&ses->iface_lock);
551 if (ses->iface_count)
552 seq_printf(m, "\n\n\tServer interfaces: %zu"
553 "\tLast updated: %lu seconds ago",
554 ses->iface_count,
555 (jiffies - ses->iface_last_update) / HZ);
556
557 last_iface = list_last_entry(&ses->iface_list,
558 struct cifs_server_iface,
559 iface_head);
560 iface_min_speed = last_iface->speed;
561
562 j = 0;
563 list_for_each_entry(iface, &ses->iface_list,
564 iface_head) {
565 seq_printf(m, "\n\t%d)", ++j);
566 cifs_dump_iface(m, iface);
567
568 iface_weight = iface->speed / iface_min_speed;
569 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
570 "\n\t\tAllocated channels: %u\n",
571 iface->weight_fulfilled,
572 iface_weight,
573 iface->num_channels);
574
575 if (is_ses_using_iface(ses, iface))
576 seq_puts(m, "\t\t[CONNECTED]\n");
577 }
578 spin_unlock(&ses->iface_lock);
579
580 seq_puts(m, "\n\n\tMIDs: ");
581 spin_lock(&ses->chan_lock);
582 for (j = 0; j < ses->chan_count; j++) {
583 chan_server = ses->chans[j].server;
584 if (!chan_server)
585 continue;
586
587 if (list_empty(&chan_server->pending_mid_q))
588 continue;
589
590 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
591 chan_server->conn_id);
592 spin_lock(&chan_server->mid_lock);
593 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
594 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
595 mid_entry->mid_state,
596 le16_to_cpu(mid_entry->command),
597 mid_entry->pid,
598 mid_entry->callback_data,
599 mid_entry->mid);
600 }
601 spin_unlock(&chan_server->mid_lock);
602 }
603 spin_unlock(&ses->chan_lock);
604 seq_puts(m, "\n--\n");
605 }
606 if (i == 0)
607 seq_printf(m, "\n\t\t[NONE]");
608 }
609 if (c == 0)
610 seq_printf(m, "\n\t[NONE]");
611
612 spin_unlock(&cifs_tcp_ses_lock);
613 seq_putc(m, '\n');
614 cifs_swn_dump(m);
615
616 /* BB add code to dump additional info such as TCP session info now */
617 return 0;
618 }
619
cifs_stats_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)620 static ssize_t cifs_stats_proc_write(struct file *file,
621 const char __user *buffer, size_t count, loff_t *ppos)
622 {
623 bool bv;
624 int rc;
625 struct TCP_Server_Info *server;
626 struct cifs_ses *ses;
627 struct cifs_tcon *tcon;
628
629 rc = kstrtobool_from_user(buffer, count, &bv);
630 if (rc == 0) {
631 #ifdef CONFIG_CIFS_STATS2
632 int i;
633
634 atomic_set(&total_buf_alloc_count, 0);
635 atomic_set(&total_small_buf_alloc_count, 0);
636 #endif /* CONFIG_CIFS_STATS2 */
637 atomic_set(&tcpSesReconnectCount, 0);
638 atomic_set(&tconInfoReconnectCount, 0);
639
640 spin_lock(&GlobalMid_Lock);
641 GlobalMaxActiveXid = 0;
642 GlobalCurrentXid = 0;
643 spin_unlock(&GlobalMid_Lock);
644 spin_lock(&cifs_tcp_ses_lock);
645 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
646 server->max_in_flight = 0;
647 #ifdef CONFIG_CIFS_STATS2
648 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
649 atomic_set(&server->num_cmds[i], 0);
650 atomic_set(&server->smb2slowcmd[i], 0);
651 server->time_per_cmd[i] = 0;
652 server->slowest_cmd[i] = 0;
653 server->fastest_cmd[0] = 0;
654 }
655 #endif /* CONFIG_CIFS_STATS2 */
656 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
657 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
658 atomic_set(&tcon->num_smbs_sent, 0);
659 spin_lock(&tcon->stat_lock);
660 tcon->bytes_read = 0;
661 tcon->bytes_written = 0;
662 spin_unlock(&tcon->stat_lock);
663 if (server->ops->clear_stats)
664 server->ops->clear_stats(tcon);
665 }
666 }
667 }
668 spin_unlock(&cifs_tcp_ses_lock);
669 } else {
670 return rc;
671 }
672
673 return count;
674 }
675
cifs_stats_proc_show(struct seq_file *m, void *v)676 static int cifs_stats_proc_show(struct seq_file *m, void *v)
677 {
678 int i;
679 #ifdef CONFIG_CIFS_STATS2
680 int j;
681 #endif /* STATS2 */
682 struct TCP_Server_Info *server;
683 struct cifs_ses *ses;
684 struct cifs_tcon *tcon;
685
686 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
687 sesInfoAllocCount.counter);
688 seq_printf(m, "Share (unique mount targets): %d\n",
689 tconInfoAllocCount.counter);
690 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
691 buf_alloc_count.counter,
692 cifs_min_rcv + tcpSesAllocCount.counter);
693 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
694 small_buf_alloc_count.counter, cifs_min_small);
695 #ifdef CONFIG_CIFS_STATS2
696 seq_printf(m, "Total Large %d Small %d Allocations\n",
697 atomic_read(&total_buf_alloc_count),
698 atomic_read(&total_small_buf_alloc_count));
699 #endif /* CONFIG_CIFS_STATS2 */
700
701 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
702 seq_printf(m,
703 "\n%d session %d share reconnects\n",
704 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
705
706 seq_printf(m,
707 "Total vfs operations: %d maximum at one time: %d\n",
708 GlobalCurrentXid, GlobalMaxActiveXid);
709
710 i = 0;
711 spin_lock(&cifs_tcp_ses_lock);
712 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
713 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
714 #ifdef CONFIG_CIFS_STATS2
715 seq_puts(m, "\nTotal time spent processing by command. Time ");
716 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
717 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
718 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
719 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
720 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
721 atomic_read(&server->num_cmds[j]),
722 server->time_per_cmd[j],
723 server->fastest_cmd[j],
724 server->slowest_cmd[j]);
725 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
726 if (atomic_read(&server->smb2slowcmd[j])) {
727 spin_lock(&server->srv_lock);
728 seq_printf(m, " %d slow responses from %s for command %d\n",
729 atomic_read(&server->smb2slowcmd[j]),
730 server->hostname, j);
731 spin_unlock(&server->srv_lock);
732 }
733 #endif /* STATS2 */
734 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
735 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
736 i++;
737 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
738 if (tcon->need_reconnect)
739 seq_puts(m, "\tDISCONNECTED ");
740 seq_printf(m, "\nSMBs: %d",
741 atomic_read(&tcon->num_smbs_sent));
742 if (server->ops->print_stats)
743 server->ops->print_stats(m, tcon);
744 }
745 }
746 }
747 spin_unlock(&cifs_tcp_ses_lock);
748
749 seq_putc(m, '\n');
750 return 0;
751 }
752
cifs_stats_proc_open(struct inode *inode, struct file *file)753 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
754 {
755 return single_open(file, cifs_stats_proc_show, NULL);
756 }
757
758 static const struct proc_ops cifs_stats_proc_ops = {
759 .proc_open = cifs_stats_proc_open,
760 .proc_read = seq_read,
761 .proc_lseek = seq_lseek,
762 .proc_release = single_release,
763 .proc_write = cifs_stats_proc_write,
764 };
765
766 #ifdef CONFIG_CIFS_SMB_DIRECT
767 #define PROC_FILE_DEFINE(name) \
768 static ssize_t name##_write(struct file *file, const char __user *buffer, \
769 size_t count, loff_t *ppos) \
770 { \
771 int rc; \
772 rc = kstrtoint_from_user(buffer, count, 10, & name); \
773 if (rc) \
774 return rc; \
775 return count; \
776 } \
777 static int name##_proc_show(struct seq_file *m, void *v) \
778 { \
779 seq_printf(m, "%d\n", name ); \
780 return 0; \
781 } \
782 static int name##_open(struct inode *inode, struct file *file) \
783 { \
784 return single_open(file, name##_proc_show, NULL); \
785 } \
786 \
787 static const struct proc_ops cifs_##name##_proc_fops = { \
788 .proc_open = name##_open, \
789 .proc_read = seq_read, \
790 .proc_lseek = seq_lseek, \
791 .proc_release = single_release, \
792 .proc_write = name##_write, \
793 }
794
795 PROC_FILE_DEFINE(rdma_readwrite_threshold);
796 PROC_FILE_DEFINE(smbd_max_frmr_depth);
797 PROC_FILE_DEFINE(smbd_keep_alive_interval);
798 PROC_FILE_DEFINE(smbd_max_receive_size);
799 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
800 PROC_FILE_DEFINE(smbd_max_send_size);
801 PROC_FILE_DEFINE(smbd_send_credit_target);
802 PROC_FILE_DEFINE(smbd_receive_credit_max);
803 #endif
804
805 static struct proc_dir_entry *proc_fs_cifs;
806 static const struct proc_ops cifsFYI_proc_ops;
807 static const struct proc_ops cifs_lookup_cache_proc_ops;
808 static const struct proc_ops traceSMB_proc_ops;
809 static const struct proc_ops cifs_security_flags_proc_ops;
810 static const struct proc_ops cifs_linux_ext_proc_ops;
811 static const struct proc_ops cifs_mount_params_proc_ops;
812
813 void
cifs_proc_init(void)814 cifs_proc_init(void)
815 {
816 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
817 if (proc_fs_cifs == NULL)
818 return;
819
820 proc_create_single("DebugData", 0, proc_fs_cifs,
821 cifs_debug_data_proc_show);
822
823 proc_create_single("open_files", 0400, proc_fs_cifs,
824 cifs_debug_files_proc_show);
825
826 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
827 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
828 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
829 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
830 &cifs_linux_ext_proc_ops);
831 proc_create("SecurityFlags", 0644, proc_fs_cifs,
832 &cifs_security_flags_proc_ops);
833 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
834 &cifs_lookup_cache_proc_ops);
835
836 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
837
838 #ifdef CONFIG_CIFS_DFS_UPCALL
839 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
840 #endif
841
842 #ifdef CONFIG_CIFS_SMB_DIRECT
843 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
844 &cifs_rdma_readwrite_threshold_proc_fops);
845 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
846 &cifs_smbd_max_frmr_depth_proc_fops);
847 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
848 &cifs_smbd_keep_alive_interval_proc_fops);
849 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
850 &cifs_smbd_max_receive_size_proc_fops);
851 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
852 &cifs_smbd_max_fragmented_recv_size_proc_fops);
853 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
854 &cifs_smbd_max_send_size_proc_fops);
855 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
856 &cifs_smbd_send_credit_target_proc_fops);
857 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
858 &cifs_smbd_receive_credit_max_proc_fops);
859 #endif
860 }
861
862 void
cifs_proc_clean(void)863 cifs_proc_clean(void)
864 {
865 if (proc_fs_cifs == NULL)
866 return;
867
868 remove_proc_entry("DebugData", proc_fs_cifs);
869 remove_proc_entry("open_files", proc_fs_cifs);
870 remove_proc_entry("cifsFYI", proc_fs_cifs);
871 remove_proc_entry("traceSMB", proc_fs_cifs);
872 remove_proc_entry("Stats", proc_fs_cifs);
873 remove_proc_entry("SecurityFlags", proc_fs_cifs);
874 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
875 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
876 remove_proc_entry("mount_params", proc_fs_cifs);
877
878 #ifdef CONFIG_CIFS_DFS_UPCALL
879 remove_proc_entry("dfscache", proc_fs_cifs);
880 #endif
881 #ifdef CONFIG_CIFS_SMB_DIRECT
882 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
883 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
884 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
885 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
886 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
887 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
888 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
889 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
890 #endif
891 remove_proc_entry("fs/cifs", NULL);
892 }
893
cifsFYI_proc_show(struct seq_file *m, void *v)894 static int cifsFYI_proc_show(struct seq_file *m, void *v)
895 {
896 seq_printf(m, "%d\n", cifsFYI);
897 return 0;
898 }
899
cifsFYI_proc_open(struct inode *inode, struct file *file)900 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
901 {
902 return single_open(file, cifsFYI_proc_show, NULL);
903 }
904
cifsFYI_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)905 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
906 size_t count, loff_t *ppos)
907 {
908 char c[2] = { '\0' };
909 bool bv;
910 int rc;
911
912 rc = get_user(c[0], buffer);
913 if (rc)
914 return rc;
915 if (kstrtobool(c, &bv) == 0)
916 cifsFYI = bv;
917 else if ((c[0] > '1') && (c[0] <= '9'))
918 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
919 else
920 return -EINVAL;
921
922 return count;
923 }
924
925 static const struct proc_ops cifsFYI_proc_ops = {
926 .proc_open = cifsFYI_proc_open,
927 .proc_read = seq_read,
928 .proc_lseek = seq_lseek,
929 .proc_release = single_release,
930 .proc_write = cifsFYI_proc_write,
931 };
932
cifs_linux_ext_proc_show(struct seq_file *m, void *v)933 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
934 {
935 seq_printf(m, "%d\n", linuxExtEnabled);
936 return 0;
937 }
938
cifs_linux_ext_proc_open(struct inode *inode, struct file *file)939 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
940 {
941 return single_open(file, cifs_linux_ext_proc_show, NULL);
942 }
943
cifs_linux_ext_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)944 static ssize_t cifs_linux_ext_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, &linuxExtEnabled);
950 if (rc)
951 return rc;
952
953 return count;
954 }
955
956 static const struct proc_ops cifs_linux_ext_proc_ops = {
957 .proc_open = cifs_linux_ext_proc_open,
958 .proc_read = seq_read,
959 .proc_lseek = seq_lseek,
960 .proc_release = single_release,
961 .proc_write = cifs_linux_ext_proc_write,
962 };
963
cifs_lookup_cache_proc_show(struct seq_file *m, void *v)964 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
965 {
966 seq_printf(m, "%d\n", lookupCacheEnabled);
967 return 0;
968 }
969
cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)970 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
971 {
972 return single_open(file, cifs_lookup_cache_proc_show, NULL);
973 }
974
cifs_lookup_cache_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)975 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
976 const char __user *buffer, size_t count, loff_t *ppos)
977 {
978 int rc;
979
980 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
981 if (rc)
982 return rc;
983
984 return count;
985 }
986
987 static const struct proc_ops cifs_lookup_cache_proc_ops = {
988 .proc_open = cifs_lookup_cache_proc_open,
989 .proc_read = seq_read,
990 .proc_lseek = seq_lseek,
991 .proc_release = single_release,
992 .proc_write = cifs_lookup_cache_proc_write,
993 };
994
traceSMB_proc_show(struct seq_file *m, void *v)995 static int traceSMB_proc_show(struct seq_file *m, void *v)
996 {
997 seq_printf(m, "%d\n", traceSMB);
998 return 0;
999 }
1000
traceSMB_proc_open(struct inode *inode, struct file *file)1001 static int traceSMB_proc_open(struct inode *inode, struct file *file)
1002 {
1003 return single_open(file, traceSMB_proc_show, NULL);
1004 }
1005
traceSMB_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)1006 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1007 size_t count, loff_t *ppos)
1008 {
1009 int rc;
1010
1011 rc = kstrtobool_from_user(buffer, count, &traceSMB);
1012 if (rc)
1013 return rc;
1014
1015 return count;
1016 }
1017
1018 static const struct proc_ops traceSMB_proc_ops = {
1019 .proc_open = traceSMB_proc_open,
1020 .proc_read = seq_read,
1021 .proc_lseek = seq_lseek,
1022 .proc_release = single_release,
1023 .proc_write = traceSMB_proc_write,
1024 };
1025
cifs_security_flags_proc_show(struct seq_file *m, void *v)1026 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1027 {
1028 seq_printf(m, "0x%x\n", global_secflags);
1029 return 0;
1030 }
1031
cifs_security_flags_proc_open(struct inode *inode, struct file *file)1032 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1033 {
1034 return single_open(file, cifs_security_flags_proc_show, NULL);
1035 }
1036
1037 /*
1038 * Ensure that if someone sets a MUST flag, that we disable all other MAY
1039 * flags except for the ones corresponding to the given MUST flag. If there are
1040 * multiple MUST flags, then try to prefer more secure ones.
1041 */
1042 static void
cifs_security_flags_handle_must_flags(unsigned int *flags)1043 cifs_security_flags_handle_must_flags(unsigned int *flags)
1044 {
1045 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
1046
1047 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1048 *flags = CIFSSEC_MUST_KRB5;
1049 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1050 *flags = CIFSSEC_MUST_NTLMSSP;
1051 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1052 *flags = CIFSSEC_MUST_NTLMV2;
1053
1054 *flags |= signflags;
1055 }
1056
cifs_security_flags_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)1057 static ssize_t cifs_security_flags_proc_write(struct file *file,
1058 const char __user *buffer, size_t count, loff_t *ppos)
1059 {
1060 int rc;
1061 unsigned int flags;
1062 char flags_string[12];
1063 bool bv;
1064
1065 if ((count < 1) || (count > 11))
1066 return -EINVAL;
1067
1068 memset(flags_string, 0, 12);
1069
1070 if (copy_from_user(flags_string, buffer, count))
1071 return -EFAULT;
1072
1073 if (count < 3) {
1074 /* single char or single char followed by null */
1075 if (kstrtobool(flags_string, &bv) == 0) {
1076 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1077 return count;
1078 } else if (!isdigit(flags_string[0])) {
1079 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1080 flags_string);
1081 return -EINVAL;
1082 }
1083 }
1084
1085 /* else we have a number */
1086 rc = kstrtouint(flags_string, 0, &flags);
1087 if (rc) {
1088 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1089 flags_string);
1090 return rc;
1091 }
1092
1093 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1094
1095 if (flags == 0) {
1096 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1097 return -EINVAL;
1098 }
1099
1100 if (flags & ~CIFSSEC_MASK) {
1101 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1102 flags & ~CIFSSEC_MASK);
1103 return -EINVAL;
1104 }
1105
1106 cifs_security_flags_handle_must_flags(&flags);
1107
1108 /* flags look ok - update the global security flags for cifs module */
1109 global_secflags = flags;
1110 if (global_secflags & CIFSSEC_MUST_SIGN) {
1111 /* requiring signing implies signing is allowed */
1112 global_secflags |= CIFSSEC_MAY_SIGN;
1113 cifs_dbg(FYI, "packet signing now required\n");
1114 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1115 cifs_dbg(FYI, "packet signing disabled\n");
1116 }
1117 /* BB should we turn on MAY flags for other MUST options? */
1118 return count;
1119 }
1120
1121 static const struct proc_ops cifs_security_flags_proc_ops = {
1122 .proc_open = cifs_security_flags_proc_open,
1123 .proc_read = seq_read,
1124 .proc_lseek = seq_lseek,
1125 .proc_release = single_release,
1126 .proc_write = cifs_security_flags_proc_write,
1127 };
1128
1129 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file *m, void *v)1130 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1131 {
1132 const struct fs_parameter_spec *p;
1133 const char *type;
1134
1135 for (p = smb3_fs_parameters; p->name; p++) {
1136 /* cannot use switch with pointers... */
1137 if (!p->type) {
1138 if (p->flags == fs_param_neg_with_no)
1139 type = "noflag";
1140 else
1141 type = "flag";
1142 } else if (p->type == fs_param_is_bool)
1143 type = "bool";
1144 else if (p->type == fs_param_is_u32)
1145 type = "u32";
1146 else if (p->type == fs_param_is_u64)
1147 type = "u64";
1148 else if (p->type == fs_param_is_string)
1149 type = "string";
1150 else
1151 type = "unknown";
1152
1153 seq_printf(m, "%s:%s\n", p->name, type);
1154 }
1155
1156 return 0;
1157 }
1158
cifs_mount_params_proc_open(struct inode *inode, struct file *file)1159 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1160 {
1161 return single_open(file, cifs_mount_params_proc_show, NULL);
1162 }
1163
1164 static const struct proc_ops cifs_mount_params_proc_ops = {
1165 .proc_open = cifs_mount_params_proc_open,
1166 .proc_read = seq_read,
1167 .proc_lseek = seq_lseek,
1168 .proc_release = single_release,
1169 /* No need for write for now */
1170 /* .proc_write = cifs_mount_params_proc_write, */
1171 };
1172
1173 #else
cifs_proc_init(void)1174 inline void cifs_proc_init(void)
1175 {
1176 }
1177
cifs_proc_clean(void)1178 inline void cifs_proc_clean(void)
1179 {
1180 }
1181 #endif /* PROC_FS */
1182