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 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
compression_alg_str(__le16 alg)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
cifs_debug_data_proc_show(struct seq_file * m,void * v)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 #ifdef CONFIG_CIFS_COMPRESSION
354 seq_puts(m, ",COMPRESSION");
355 #endif
356 seq_putc(m, '\n');
357 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
358 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
359
360 seq_printf(m, "\nServers: ");
361
362 c = 0;
363 spin_lock(&cifs_tcp_ses_lock);
364 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
365 #ifdef CONFIG_CIFS_SMB_DIRECT
366 struct smbdirect_socket_parameters *sp;
367 #endif
368
369 /* channel info will be printed as a part of sessions below */
370 if (SERVER_IS_CHAN(server))
371 continue;
372
373 c++;
374 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
375 c, server->conn_id);
376
377 spin_lock(&server->srv_lock);
378 if (server->hostname)
379 seq_printf(m, "Hostname: %s ", server->hostname);
380 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
381 spin_unlock(&server->srv_lock);
382 #ifdef CONFIG_CIFS_SMB_DIRECT
383 if (!server->rdma)
384 goto skip_rdma;
385
386 if (!server->smbd_conn) {
387 seq_printf(m, "\nSMBDirect transport not available");
388 goto skip_rdma;
389 }
390 sp = &server->smbd_conn->socket.parameters;
391
392 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
393 "transport status: %x",
394 server->smbd_conn->protocol,
395 server->smbd_conn->socket.status);
396 seq_printf(m, "\nConn receive_credit_max: %x "
397 "send_credit_target: %x max_send_size: %x",
398 sp->recv_credit_max,
399 sp->send_credit_target,
400 sp->max_send_size);
401 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
402 "max_fragmented_send_size: %x max_receive_size:%x",
403 sp->max_fragmented_recv_size,
404 sp->max_fragmented_send_size,
405 sp->max_recv_size);
406 seq_printf(m, "\nConn keep_alive_interval: %x "
407 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
408 sp->keepalive_interval_msec * 1000,
409 sp->max_read_write_size,
410 server->smbd_conn->rdma_readwrite_threshold);
411 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
412 "count_put_receive_buffer: %x count_send_empty: %x",
413 server->smbd_conn->count_get_receive_buffer,
414 server->smbd_conn->count_put_receive_buffer,
415 server->smbd_conn->count_send_empty);
416 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
417 "count_enqueue_reassembly_queue: %x "
418 "count_dequeue_reassembly_queue: %x "
419 "fragment_reassembly_remaining: %x "
420 "reassembly_data_length: %x "
421 "reassembly_queue_length: %x",
422 server->smbd_conn->count_reassembly_queue,
423 server->smbd_conn->count_enqueue_reassembly_queue,
424 server->smbd_conn->count_dequeue_reassembly_queue,
425 server->smbd_conn->fragment_reassembly_remaining,
426 server->smbd_conn->reassembly_data_length,
427 server->smbd_conn->reassembly_queue_length);
428 seq_printf(m, "\nCurrent Credits send_credits: %x "
429 "receive_credits: %x receive_credit_target: %x",
430 atomic_read(&server->smbd_conn->send_credits),
431 atomic_read(&server->smbd_conn->receive_credits),
432 server->smbd_conn->receive_credit_target);
433 seq_printf(m, "\nPending send_pending: %x ",
434 atomic_read(&server->smbd_conn->send_pending));
435 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
436 "count_empty_packet_queue: %x",
437 server->smbd_conn->count_receive_queue,
438 server->smbd_conn->count_empty_packet_queue);
439 seq_printf(m, "\nMR responder_resources: %x "
440 "max_frmr_depth: %x mr_type: %x",
441 server->smbd_conn->responder_resources,
442 server->smbd_conn->max_frmr_depth,
443 server->smbd_conn->mr_type);
444 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
445 atomic_read(&server->smbd_conn->mr_ready_count),
446 atomic_read(&server->smbd_conn->mr_used_count));
447 skip_rdma:
448 #endif
449 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
450 server->credits,
451 server->echo_credits,
452 server->oplock_credits,
453 server->dialect);
454 if (server->sign)
455 seq_printf(m, " signed");
456 if (server->posix_ext_supported)
457 seq_printf(m, " posix");
458 if (server->nosharesock)
459 seq_printf(m, " nosharesock");
460
461 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities);
462
463 if (server->rdma)
464 seq_printf(m, "\nRDMA ");
465 seq_printf(m, "\nTCP status: %d Instance: %d"
466 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
467 server->tcpStatus,
468 server->reconnect_instance,
469 server->srv_count,
470 server->sec_mode, in_flight(server));
471 #ifdef CONFIG_NET_NS
472 if (server->net)
473 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
474 #endif /* NET_NS */
475
476 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
477 atomic_read(&server->in_send),
478 atomic_read(&server->num_waiters));
479
480 if (server->leaf_fullpath) {
481 seq_printf(m, "\nDFS leaf full path: %s",
482 server->leaf_fullpath);
483 }
484
485 seq_puts(m, "\nCompression: ");
486 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION))
487 seq_puts(m, "no built-in support");
488 else if (!server->compression.requested)
489 seq_puts(m, "disabled on mount");
490 else if (server->compression.enabled)
491 seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg));
492 else
493 seq_puts(m, "disabled (not supported by this server)");
494
495 seq_printf(m, "\n\n\tSessions: ");
496 i = 0;
497 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
498 spin_lock(&ses->ses_lock);
499 if (ses->ses_status == SES_EXITING) {
500 spin_unlock(&ses->ses_lock);
501 continue;
502 }
503 i++;
504 if ((ses->serverDomain == NULL) ||
505 (ses->serverOS == NULL) ||
506 (ses->serverNOS == NULL)) {
507 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
508 i, ses->ip_addr, ses->ses_count,
509 ses->capabilities, ses->ses_status);
510 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
511 seq_printf(m, "Guest ");
512 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
513 seq_printf(m, "Anonymous ");
514 } else {
515 seq_printf(m,
516 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
517 "\n\tNOS: %s\tCapability: 0x%x"
518 "\n\tSMB session status: %d ",
519 i, ses->ip_addr, ses->serverDomain,
520 ses->ses_count, ses->serverOS, ses->serverNOS,
521 ses->capabilities, ses->ses_status);
522 }
523 if (ses->expired_pwd)
524 seq_puts(m, "password no longer valid ");
525 spin_unlock(&ses->ses_lock);
526
527 seq_printf(m, "\n\tSecurity type: %s ",
528 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
529
530 /* dump session id helpful for use with network trace */
531 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
532 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
533 seq_puts(m, " encrypted");
534 /* can help in debugging to show encryption type */
535 if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
536 seq_puts(m, "(gcm256)");
537 }
538 if (ses->sign)
539 seq_puts(m, " signed");
540
541 seq_printf(m, "\n\tUser: %d Cred User: %d",
542 from_kuid(&init_user_ns, ses->linux_uid),
543 from_kuid(&init_user_ns, ses->cred_uid));
544
545 if (ses->dfs_root_ses) {
546 seq_printf(m, "\n\tDFS root session id: 0x%llx",
547 ses->dfs_root_ses->Suid);
548 }
549
550 spin_lock(&ses->chan_lock);
551 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
552 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
553 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
554 seq_puts(m, "\t[RECONNECTING] ");
555
556 if (ses->chan_count > 1) {
557 seq_printf(m, "\n\n\tExtra Channels: %zu ",
558 ses->chan_count-1);
559 for (j = 1; j < ses->chan_count; j++) {
560 cifs_dump_channel(m, j, &ses->chans[j]);
561 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
562 seq_puts(m, "\tDISCONNECTED ");
563 if (CIFS_CHAN_IN_RECONNECT(ses, j))
564 seq_puts(m, "\t[RECONNECTING] ");
565 }
566 }
567 spin_unlock(&ses->chan_lock);
568
569 seq_puts(m, "\n\n\tShares: ");
570 j = 0;
571
572 seq_printf(m, "\n\t%d) IPC: ", j);
573 if (ses->tcon_ipc)
574 cifs_debug_tcon(m, ses->tcon_ipc);
575 else
576 seq_puts(m, "none\n");
577
578 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
579 ++j;
580 seq_printf(m, "\n\t%d) ", j);
581 cifs_debug_tcon(m, tcon);
582 }
583
584 spin_lock(&ses->iface_lock);
585 if (ses->iface_count)
586 seq_printf(m, "\n\n\tServer interfaces: %zu"
587 "\tLast updated: %lu seconds ago",
588 ses->iface_count,
589 (jiffies - ses->iface_last_update) / HZ);
590
591 last_iface = list_last_entry(&ses->iface_list,
592 struct cifs_server_iface,
593 iface_head);
594 iface_min_speed = last_iface->speed;
595
596 j = 0;
597 list_for_each_entry(iface, &ses->iface_list,
598 iface_head) {
599 seq_printf(m, "\n\t%d)", ++j);
600 cifs_dump_iface(m, iface);
601
602 iface_weight = iface->speed / iface_min_speed;
603 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
604 "\n\t\tAllocated channels: %u\n",
605 iface->weight_fulfilled,
606 iface_weight,
607 iface->num_channels);
608
609 if (is_ses_using_iface(ses, iface))
610 seq_puts(m, "\t\t[CONNECTED]\n");
611 }
612 spin_unlock(&ses->iface_lock);
613
614 seq_puts(m, "\n\n\tMIDs: ");
615 spin_lock(&ses->chan_lock);
616 for (j = 0; j < ses->chan_count; j++) {
617 chan_server = ses->chans[j].server;
618 if (!chan_server)
619 continue;
620
621 if (list_empty(&chan_server->pending_mid_q))
622 continue;
623
624 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
625 chan_server->conn_id);
626 spin_lock(&chan_server->mid_lock);
627 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
628 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
629 mid_entry->mid_state,
630 le16_to_cpu(mid_entry->command),
631 mid_entry->pid,
632 mid_entry->callback_data,
633 mid_entry->mid);
634 }
635 spin_unlock(&chan_server->mid_lock);
636 }
637 spin_unlock(&ses->chan_lock);
638 seq_puts(m, "\n--\n");
639 }
640 if (i == 0)
641 seq_printf(m, "\n\t\t[NONE]");
642 }
643 if (c == 0)
644 seq_printf(m, "\n\t[NONE]");
645
646 spin_unlock(&cifs_tcp_ses_lock);
647 seq_putc(m, '\n');
648 cifs_swn_dump(m);
649
650 /* BB add code to dump additional info such as TCP session info now */
651 return 0;
652 }
653
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)654 static ssize_t cifs_stats_proc_write(struct file *file,
655 const char __user *buffer, size_t count, loff_t *ppos)
656 {
657 bool bv;
658 int rc;
659 struct TCP_Server_Info *server;
660 struct cifs_ses *ses;
661 struct cifs_tcon *tcon;
662
663 rc = kstrtobool_from_user(buffer, count, &bv);
664 if (rc == 0) {
665 #ifdef CONFIG_CIFS_STATS2
666 int i;
667
668 atomic_set(&total_buf_alloc_count, 0);
669 atomic_set(&total_small_buf_alloc_count, 0);
670 #endif /* CONFIG_CIFS_STATS2 */
671 atomic_set(&tcpSesReconnectCount, 0);
672 atomic_set(&tconInfoReconnectCount, 0);
673
674 spin_lock(&GlobalMid_Lock);
675 GlobalMaxActiveXid = 0;
676 GlobalCurrentXid = 0;
677 spin_unlock(&GlobalMid_Lock);
678 spin_lock(&cifs_tcp_ses_lock);
679 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
680 server->max_in_flight = 0;
681 #ifdef CONFIG_CIFS_STATS2
682 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
683 atomic_set(&server->num_cmds[i], 0);
684 atomic_set(&server->smb2slowcmd[i], 0);
685 server->time_per_cmd[i] = 0;
686 server->slowest_cmd[i] = 0;
687 server->fastest_cmd[0] = 0;
688 }
689 #endif /* CONFIG_CIFS_STATS2 */
690 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
691 if (cifs_ses_exiting(ses))
692 continue;
693 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
694 atomic_set(&tcon->num_smbs_sent, 0);
695 spin_lock(&tcon->stat_lock);
696 tcon->bytes_read = 0;
697 tcon->bytes_written = 0;
698 tcon->stats_from_time = ktime_get_real_seconds();
699 spin_unlock(&tcon->stat_lock);
700 if (server->ops->clear_stats)
701 server->ops->clear_stats(tcon);
702 }
703 }
704 }
705 spin_unlock(&cifs_tcp_ses_lock);
706 } else {
707 return rc;
708 }
709
710 return count;
711 }
712
cifs_stats_proc_show(struct seq_file * m,void * v)713 static int cifs_stats_proc_show(struct seq_file *m, void *v)
714 {
715 int i;
716 #ifdef CONFIG_CIFS_STATS2
717 int j;
718 #endif /* STATS2 */
719 struct TCP_Server_Info *server;
720 struct cifs_ses *ses;
721 struct cifs_tcon *tcon;
722
723 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
724 sesInfoAllocCount.counter);
725 seq_printf(m, "Share (unique mount targets): %d\n",
726 tconInfoAllocCount.counter);
727 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
728 buf_alloc_count.counter,
729 cifs_min_rcv + tcpSesAllocCount.counter);
730 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
731 small_buf_alloc_count.counter, cifs_min_small);
732 #ifdef CONFIG_CIFS_STATS2
733 seq_printf(m, "Total Large %d Small %d Allocations\n",
734 atomic_read(&total_buf_alloc_count),
735 atomic_read(&total_small_buf_alloc_count));
736 #endif /* CONFIG_CIFS_STATS2 */
737
738 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
739 seq_printf(m,
740 "\n%d session %d share reconnects\n",
741 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
742
743 seq_printf(m,
744 "Total vfs operations: %d maximum at one time: %d\n",
745 GlobalCurrentXid, GlobalMaxActiveXid);
746
747 i = 0;
748 spin_lock(&cifs_tcp_ses_lock);
749 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
750 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
751 #ifdef CONFIG_CIFS_STATS2
752 seq_puts(m, "\nTotal time spent processing by command. Time ");
753 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
754 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
755 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
756 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
757 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
758 atomic_read(&server->num_cmds[j]),
759 server->time_per_cmd[j],
760 server->fastest_cmd[j],
761 server->slowest_cmd[j]);
762 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
763 if (atomic_read(&server->smb2slowcmd[j])) {
764 spin_lock(&server->srv_lock);
765 seq_printf(m, " %d slow responses from %s for command %d\n",
766 atomic_read(&server->smb2slowcmd[j]),
767 server->hostname, j);
768 spin_unlock(&server->srv_lock);
769 }
770 #endif /* STATS2 */
771 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
772 if (cifs_ses_exiting(ses))
773 continue;
774 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
775 i++;
776 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
777 if (tcon->need_reconnect)
778 seq_puts(m, "\tDISCONNECTED ");
779 seq_printf(m, "\nSMBs: %d since %ptTs UTC",
780 atomic_read(&tcon->num_smbs_sent),
781 &tcon->stats_from_time);
782 if (server->ops->print_stats)
783 server->ops->print_stats(m, tcon);
784 }
785 }
786 }
787 spin_unlock(&cifs_tcp_ses_lock);
788
789 seq_putc(m, '\n');
790 return 0;
791 }
792
cifs_stats_proc_open(struct inode * inode,struct file * file)793 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
794 {
795 return single_open(file, cifs_stats_proc_show, NULL);
796 }
797
798 static const struct proc_ops cifs_stats_proc_ops = {
799 .proc_open = cifs_stats_proc_open,
800 .proc_read = seq_read,
801 .proc_lseek = seq_lseek,
802 .proc_release = single_release,
803 .proc_write = cifs_stats_proc_write,
804 };
805
806 #ifdef CONFIG_CIFS_SMB_DIRECT
807 #define PROC_FILE_DEFINE(name) \
808 static ssize_t name##_write(struct file *file, const char __user *buffer, \
809 size_t count, loff_t *ppos) \
810 { \
811 int rc; \
812 rc = kstrtoint_from_user(buffer, count, 10, &name); \
813 if (rc) \
814 return rc; \
815 return count; \
816 } \
817 static int name##_proc_show(struct seq_file *m, void *v) \
818 { \
819 seq_printf(m, "%d\n", name); \
820 return 0; \
821 } \
822 static int name##_open(struct inode *inode, struct file *file) \
823 { \
824 return single_open(file, name##_proc_show, NULL); \
825 } \
826 \
827 static const struct proc_ops cifs_##name##_proc_fops = { \
828 .proc_open = name##_open, \
829 .proc_read = seq_read, \
830 .proc_lseek = seq_lseek, \
831 .proc_release = single_release, \
832 .proc_write = name##_write, \
833 }
834
835 PROC_FILE_DEFINE(rdma_readwrite_threshold);
836 PROC_FILE_DEFINE(smbd_max_frmr_depth);
837 PROC_FILE_DEFINE(smbd_keep_alive_interval);
838 PROC_FILE_DEFINE(smbd_max_receive_size);
839 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
840 PROC_FILE_DEFINE(smbd_max_send_size);
841 PROC_FILE_DEFINE(smbd_send_credit_target);
842 PROC_FILE_DEFINE(smbd_receive_credit_max);
843 #endif
844
845 static struct proc_dir_entry *proc_fs_cifs;
846 static const struct proc_ops cifsFYI_proc_ops;
847 static const struct proc_ops cifs_lookup_cache_proc_ops;
848 static const struct proc_ops traceSMB_proc_ops;
849 static const struct proc_ops cifs_security_flags_proc_ops;
850 static const struct proc_ops cifs_linux_ext_proc_ops;
851 static const struct proc_ops cifs_mount_params_proc_ops;
852
853 void
cifs_proc_init(void)854 cifs_proc_init(void)
855 {
856 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
857 if (proc_fs_cifs == NULL)
858 return;
859
860 proc_create_single("DebugData", 0, proc_fs_cifs,
861 cifs_debug_data_proc_show);
862
863 proc_create_single("open_files", 0400, proc_fs_cifs,
864 cifs_debug_files_proc_show);
865
866 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
867 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
868 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
869 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
870 &cifs_linux_ext_proc_ops);
871 proc_create("SecurityFlags", 0644, proc_fs_cifs,
872 &cifs_security_flags_proc_ops);
873 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
874 &cifs_lookup_cache_proc_ops);
875
876 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
877
878 #ifdef CONFIG_CIFS_DFS_UPCALL
879 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
880 #endif
881
882 #ifdef CONFIG_CIFS_SMB_DIRECT
883 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
884 &cifs_rdma_readwrite_threshold_proc_fops);
885 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
886 &cifs_smbd_max_frmr_depth_proc_fops);
887 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
888 &cifs_smbd_keep_alive_interval_proc_fops);
889 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
890 &cifs_smbd_max_receive_size_proc_fops);
891 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
892 &cifs_smbd_max_fragmented_recv_size_proc_fops);
893 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
894 &cifs_smbd_max_send_size_proc_fops);
895 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
896 &cifs_smbd_send_credit_target_proc_fops);
897 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
898 &cifs_smbd_receive_credit_max_proc_fops);
899 #endif
900 }
901
902 void
cifs_proc_clean(void)903 cifs_proc_clean(void)
904 {
905 if (proc_fs_cifs == NULL)
906 return;
907
908 remove_proc_entry("DebugData", proc_fs_cifs);
909 remove_proc_entry("open_files", proc_fs_cifs);
910 remove_proc_entry("cifsFYI", proc_fs_cifs);
911 remove_proc_entry("traceSMB", proc_fs_cifs);
912 remove_proc_entry("Stats", proc_fs_cifs);
913 remove_proc_entry("SecurityFlags", proc_fs_cifs);
914 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
915 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
916 remove_proc_entry("mount_params", proc_fs_cifs);
917
918 #ifdef CONFIG_CIFS_DFS_UPCALL
919 remove_proc_entry("dfscache", proc_fs_cifs);
920 #endif
921 #ifdef CONFIG_CIFS_SMB_DIRECT
922 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
923 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
924 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
925 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
926 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
927 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
928 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
929 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
930 #endif
931 remove_proc_entry("fs/cifs", NULL);
932 }
933
cifsFYI_proc_show(struct seq_file * m,void * v)934 static int cifsFYI_proc_show(struct seq_file *m, void *v)
935 {
936 seq_printf(m, "%d\n", cifsFYI);
937 return 0;
938 }
939
cifsFYI_proc_open(struct inode * inode,struct file * file)940 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
941 {
942 return single_open(file, cifsFYI_proc_show, NULL);
943 }
944
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)945 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
946 size_t count, loff_t *ppos)
947 {
948 char c[2] = { '\0' };
949 bool bv;
950 int rc;
951
952 rc = get_user(c[0], buffer);
953 if (rc)
954 return rc;
955 if (kstrtobool(c, &bv) == 0)
956 cifsFYI = bv;
957 else if ((c[0] > '1') && (c[0] <= '9'))
958 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
959 else
960 return -EINVAL;
961
962 return count;
963 }
964
965 static const struct proc_ops cifsFYI_proc_ops = {
966 .proc_open = cifsFYI_proc_open,
967 .proc_read = seq_read,
968 .proc_lseek = seq_lseek,
969 .proc_release = single_release,
970 .proc_write = cifsFYI_proc_write,
971 };
972
cifs_linux_ext_proc_show(struct seq_file * m,void * v)973 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
974 {
975 seq_printf(m, "%d\n", linuxExtEnabled);
976 return 0;
977 }
978
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)979 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
980 {
981 return single_open(file, cifs_linux_ext_proc_show, NULL);
982 }
983
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)984 static ssize_t cifs_linux_ext_proc_write(struct file *file,
985 const char __user *buffer, size_t count, loff_t *ppos)
986 {
987 int rc;
988
989 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
990 if (rc)
991 return rc;
992
993 return count;
994 }
995
996 static const struct proc_ops cifs_linux_ext_proc_ops = {
997 .proc_open = cifs_linux_ext_proc_open,
998 .proc_read = seq_read,
999 .proc_lseek = seq_lseek,
1000 .proc_release = single_release,
1001 .proc_write = cifs_linux_ext_proc_write,
1002 };
1003
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)1004 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
1005 {
1006 seq_printf(m, "%d\n", lookupCacheEnabled);
1007 return 0;
1008 }
1009
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)1010 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
1011 {
1012 return single_open(file, cifs_lookup_cache_proc_show, NULL);
1013 }
1014
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1015 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
1016 const char __user *buffer, size_t count, loff_t *ppos)
1017 {
1018 int rc;
1019
1020 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
1021 if (rc)
1022 return rc;
1023
1024 return count;
1025 }
1026
1027 static const struct proc_ops cifs_lookup_cache_proc_ops = {
1028 .proc_open = cifs_lookup_cache_proc_open,
1029 .proc_read = seq_read,
1030 .proc_lseek = seq_lseek,
1031 .proc_release = single_release,
1032 .proc_write = cifs_lookup_cache_proc_write,
1033 };
1034
traceSMB_proc_show(struct seq_file * m,void * v)1035 static int traceSMB_proc_show(struct seq_file *m, void *v)
1036 {
1037 seq_printf(m, "%d\n", traceSMB);
1038 return 0;
1039 }
1040
traceSMB_proc_open(struct inode * inode,struct file * file)1041 static int traceSMB_proc_open(struct inode *inode, struct file *file)
1042 {
1043 return single_open(file, traceSMB_proc_show, NULL);
1044 }
1045
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1046 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1047 size_t count, loff_t *ppos)
1048 {
1049 int rc;
1050
1051 rc = kstrtobool_from_user(buffer, count, &traceSMB);
1052 if (rc)
1053 return rc;
1054
1055 return count;
1056 }
1057
1058 static const struct proc_ops traceSMB_proc_ops = {
1059 .proc_open = traceSMB_proc_open,
1060 .proc_read = seq_read,
1061 .proc_lseek = seq_lseek,
1062 .proc_release = single_release,
1063 .proc_write = traceSMB_proc_write,
1064 };
1065
cifs_security_flags_proc_show(struct seq_file * m,void * v)1066 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1067 {
1068 seq_printf(m, "0x%x\n", global_secflags);
1069 return 0;
1070 }
1071
cifs_security_flags_proc_open(struct inode * inode,struct file * file)1072 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1073 {
1074 return single_open(file, cifs_security_flags_proc_show, NULL);
1075 }
1076
1077 /*
1078 * Ensure that if someone sets a MUST flag, that we disable all other MAY
1079 * flags except for the ones corresponding to the given MUST flag. If there are
1080 * multiple MUST flags, then try to prefer more secure ones.
1081 */
1082 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)1083 cifs_security_flags_handle_must_flags(unsigned int *flags)
1084 {
1085 unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL);
1086
1087 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1088 *flags = CIFSSEC_MUST_KRB5;
1089 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1090 *flags = CIFSSEC_MUST_NTLMSSP;
1091 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1092 *flags = CIFSSEC_MUST_NTLMV2;
1093
1094 *flags |= signflags;
1095 }
1096
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1097 static ssize_t cifs_security_flags_proc_write(struct file *file,
1098 const char __user *buffer, size_t count, loff_t *ppos)
1099 {
1100 int rc;
1101 unsigned int flags;
1102 char flags_string[12];
1103 bool bv;
1104
1105 if ((count < 1) || (count > 11))
1106 return -EINVAL;
1107
1108 memset(flags_string, 0, sizeof(flags_string));
1109
1110 if (copy_from_user(flags_string, buffer, count))
1111 return -EFAULT;
1112
1113 if (count < 3) {
1114 /* single char or single char followed by null */
1115 if (kstrtobool(flags_string, &bv) == 0) {
1116 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1117 return count;
1118 } else if (!isdigit(flags_string[0])) {
1119 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1120 flags_string);
1121 return -EINVAL;
1122 }
1123 }
1124
1125 /* else we have a number */
1126 rc = kstrtouint(flags_string, 0, &flags);
1127 if (rc) {
1128 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1129 flags_string);
1130 return rc;
1131 }
1132
1133 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1134
1135 if (flags == 0) {
1136 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1137 return -EINVAL;
1138 }
1139
1140 if (flags & ~CIFSSEC_MASK) {
1141 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1142 flags & ~CIFSSEC_MASK);
1143 return -EINVAL;
1144 }
1145
1146 cifs_security_flags_handle_must_flags(&flags);
1147
1148 /* flags look ok - update the global security flags for cifs module */
1149 global_secflags = flags;
1150 if (global_secflags & CIFSSEC_MUST_SIGN) {
1151 /* requiring signing implies signing is allowed */
1152 global_secflags |= CIFSSEC_MAY_SIGN;
1153 cifs_dbg(FYI, "packet signing now required\n");
1154 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1155 cifs_dbg(FYI, "packet signing disabled\n");
1156 }
1157 /* BB should we turn on MAY flags for other MUST options? */
1158 return count;
1159 }
1160
1161 static const struct proc_ops cifs_security_flags_proc_ops = {
1162 .proc_open = cifs_security_flags_proc_open,
1163 .proc_read = seq_read,
1164 .proc_lseek = seq_lseek,
1165 .proc_release = single_release,
1166 .proc_write = cifs_security_flags_proc_write,
1167 };
1168
1169 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file * m,void * v)1170 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1171 {
1172 const struct fs_parameter_spec *p;
1173 const char *type;
1174
1175 for (p = smb3_fs_parameters; p->name; p++) {
1176 /* cannot use switch with pointers... */
1177 if (!p->type) {
1178 if (p->flags == fs_param_neg_with_no)
1179 type = "noflag";
1180 else
1181 type = "flag";
1182 } else if (p->type == fs_param_is_bool)
1183 type = "bool";
1184 else if (p->type == fs_param_is_u32)
1185 type = "u32";
1186 else if (p->type == fs_param_is_u64)
1187 type = "u64";
1188 else if (p->type == fs_param_is_string)
1189 type = "string";
1190 else
1191 type = "unknown";
1192
1193 seq_printf(m, "%s:%s\n", p->name, type);
1194 }
1195
1196 return 0;
1197 }
1198
cifs_mount_params_proc_open(struct inode * inode,struct file * file)1199 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1200 {
1201 return single_open(file, cifs_mount_params_proc_show, NULL);
1202 }
1203
1204 static const struct proc_ops cifs_mount_params_proc_ops = {
1205 .proc_open = cifs_mount_params_proc_open,
1206 .proc_read = seq_read,
1207 .proc_lseek = seq_lseek,
1208 .proc_release = single_release,
1209 /* No need for write for now */
1210 /* .proc_write = cifs_mount_params_proc_write, */
1211 };
1212
1213 #else
cifs_proc_init(void)1214 inline void cifs_proc_init(void)
1215 {
1216 }
1217
cifs_proc_clean(void)1218 inline void cifs_proc_clean(void)
1219 {
1220 }
1221 #endif /* PROC_FS */
1222