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 #include "cached_dir.h"
30
31 void
cifs_dump_mem(char * label,void * data,int length)32 cifs_dump_mem(char *label, void *data, int length)
33 {
34 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
35 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
36 data, length, true);
37 }
38
cifs_dump_detail(void * buf,struct TCP_Server_Info * server)39 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
40 {
41 #ifdef CONFIG_CIFS_DEBUG2
42 struct smb_hdr *smb = buf;
43
44 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n",
45 smb->Command, smb->Status.CifsError, smb->Flags,
46 smb->Flags2, smb->Mid, smb->Pid, smb->WordCount);
47 if (!server->ops->check_message(buf, server->total_read, server)) {
48 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
49 server->ops->calc_smb_size(smb));
50 }
51 #endif /* CONFIG_CIFS_DEBUG2 */
52 }
53
cifs_dump_mids(struct TCP_Server_Info * server)54 void cifs_dump_mids(struct TCP_Server_Info *server)
55 {
56 #ifdef CONFIG_CIFS_DEBUG2
57 struct mid_q_entry *mid_entry;
58
59 if (server == NULL)
60 return;
61
62 cifs_dbg(VFS, "Dump pending requests:\n");
63 spin_lock(&server->mid_queue_lock);
64 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
65 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
66 mid_entry->mid_state,
67 le16_to_cpu(mid_entry->command),
68 mid_entry->pid,
69 mid_entry->callback_data,
70 mid_entry->mid);
71 #ifdef CONFIG_CIFS_STATS2
72 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
73 mid_entry->large_buf,
74 mid_entry->resp_buf,
75 mid_entry->when_received,
76 jiffies);
77 #endif /* STATS2 */
78 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
79 mid_entry->multiRsp, mid_entry->multiEnd);
80 if (mid_entry->resp_buf) {
81 cifs_dump_detail(mid_entry->resp_buf, server);
82 cifs_dump_mem("existing buf: ",
83 mid_entry->resp_buf, 62);
84 }
85 }
86 spin_unlock(&server->mid_queue_lock);
87 #endif /* CONFIG_CIFS_DEBUG2 */
88 }
89
90 #ifdef CONFIG_PROC_FS
cifs_debug_tcon(struct seq_file * m,struct cifs_tcon * tcon)91 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
92 {
93 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
94
95 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
96 if (tcon->nativeFileSystem)
97 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
98 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
99 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
100 le32_to_cpu(tcon->fsAttrInfo.Attributes),
101 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
102 tcon->status);
103 if (dev_type == FILE_DEVICE_DISK)
104 seq_puts(m, " type: DISK ");
105 else if (dev_type == FILE_DEVICE_CD_ROM)
106 seq_puts(m, " type: CDROM ");
107 else
108 seq_printf(m, " type: %d ", dev_type);
109
110 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
111
112 if ((tcon->seal) ||
113 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
114 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
115 seq_puts(m, " encrypted");
116 if (tcon->nocase)
117 seq_printf(m, " nocase");
118 if (tcon->unix_ext)
119 seq_printf(m, " POSIX Extensions");
120 if (tcon->ses->server->ops->dump_share_caps)
121 tcon->ses->server->ops->dump_share_caps(m, tcon);
122 if (tcon->use_witness)
123 seq_puts(m, " Witness");
124 if (tcon->broken_sparse_sup)
125 seq_puts(m, " nosparse");
126 if (tcon->need_reconnect)
127 seq_puts(m, "\tDISCONNECTED ");
128 spin_lock(&tcon->tc_lock);
129 if (tcon->origin_fullpath) {
130 seq_printf(m, "\n\tDFS origin fullpath: %s",
131 tcon->origin_fullpath);
132 }
133 spin_unlock(&tcon->tc_lock);
134 seq_putc(m, '\n');
135 }
136
137 static void
cifs_dump_channel(struct seq_file * m,int i,struct cifs_chan * chan)138 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
139 {
140 struct TCP_Server_Info *server = chan->server;
141
142 if (!server) {
143 seq_printf(m, "\n\n\t\tChannel: %d DISABLED", i+1);
144 return;
145 }
146
147 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
148 "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
149 "\n\t\tTCP status: %d Instance: %d"
150 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
151 "\n\t\tIn Send: %d In MaxReq Wait: %d",
152 i+1, server->conn_id,
153 server->credits,
154 server->echo_credits,
155 server->oplock_credits,
156 server->dialect,
157 server->tcpStatus,
158 server->reconnect_instance,
159 server->srv_count,
160 server->sec_mode,
161 in_flight(server),
162 atomic_read(&server->in_send),
163 atomic_read(&server->num_waiters));
164 #ifdef CONFIG_NET_NS
165 if (server->net)
166 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
167 #endif /* NET_NS */
168
169 }
170
smb_speed_to_str(size_t bps)171 static inline const char *smb_speed_to_str(size_t bps)
172 {
173 size_t mbps = bps / 1000 / 1000;
174
175 switch (mbps) {
176 case SPEED_10:
177 return "10Mbps";
178 case SPEED_100:
179 return "100Mbps";
180 case SPEED_1000:
181 return "1Gbps";
182 case SPEED_2500:
183 return "2.5Gbps";
184 case SPEED_5000:
185 return "5Gbps";
186 case SPEED_10000:
187 return "10Gbps";
188 case SPEED_14000:
189 return "14Gbps";
190 case SPEED_20000:
191 return "20Gbps";
192 case SPEED_25000:
193 return "25Gbps";
194 case SPEED_40000:
195 return "40Gbps";
196 case SPEED_50000:
197 return "50Gbps";
198 case SPEED_56000:
199 return "56Gbps";
200 case SPEED_100000:
201 return "100Gbps";
202 case SPEED_200000:
203 return "200Gbps";
204 case SPEED_400000:
205 return "400Gbps";
206 case SPEED_800000:
207 return "800Gbps";
208 default:
209 return "Unknown";
210 }
211 }
212
213 static void
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)214 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
215 {
216 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
217 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
218
219 seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
220 seq_puts(m, "\t\tCapabilities: ");
221 if (iface->rdma_capable)
222 seq_puts(m, "rdma ");
223 if (iface->rss_capable)
224 seq_puts(m, "rss ");
225 if (!iface->rdma_capable && !iface->rss_capable)
226 seq_puts(m, "None");
227 seq_putc(m, '\n');
228 if (iface->sockaddr.ss_family == AF_INET)
229 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
230 else if (iface->sockaddr.ss_family == AF_INET6)
231 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
232 if (!iface->is_active)
233 seq_puts(m, "\t\t[for-cleanup]\n");
234 }
235
cifs_debug_files_proc_show(struct seq_file * m,void * v)236 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
237 {
238 struct TCP_Server_Info *server;
239 struct cifs_ses *ses;
240 struct cifs_tcon *tcon;
241 struct cifsFileInfo *cfile;
242
243 seq_puts(m, "# Version:1\n");
244 seq_puts(m, "# Format:\n");
245 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
246 #ifdef CONFIG_CIFS_DEBUG2
247 seq_printf(m, " <filename> <mid>\n");
248 #else
249 seq_printf(m, " <filename>\n");
250 #endif /* CIFS_DEBUG2 */
251 spin_lock(&cifs_tcp_ses_lock);
252 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
253 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
254 if (cifs_ses_exiting(ses))
255 continue;
256 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
257 spin_lock(&tcon->open_file_lock);
258 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
259 seq_printf(m,
260 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
261 tcon->tid,
262 ses->Suid,
263 cfile->fid.persistent_fid,
264 cfile->f_flags,
265 cfile->count,
266 cfile->pid,
267 from_kuid(&init_user_ns, cfile->uid),
268 cfile->dentry);
269 #ifdef CONFIG_CIFS_DEBUG2
270 seq_printf(m, " %llu\n", cfile->fid.mid);
271 #else
272 seq_printf(m, "\n");
273 #endif /* CIFS_DEBUG2 */
274 }
275 spin_unlock(&tcon->open_file_lock);
276 }
277 }
278 }
279 spin_unlock(&cifs_tcp_ses_lock);
280 seq_putc(m, '\n');
281 return 0;
282 }
283
cifs_debug_dirs_proc_show(struct seq_file * m,void * v)284 static int cifs_debug_dirs_proc_show(struct seq_file *m, void *v)
285 {
286 struct list_head *stmp, *tmp, *tmp1;
287 struct TCP_Server_Info *server;
288 struct cifs_ses *ses;
289 struct cifs_tcon *tcon;
290 struct cached_fids *cfids;
291 struct cached_fid *cfid;
292 LIST_HEAD(entry);
293
294 seq_puts(m, "# Version:1\n");
295 seq_puts(m, "# Format:\n");
296 seq_puts(m, "# <tree id> <sess id> <persistent fid> <path>\n");
297
298 spin_lock(&cifs_tcp_ses_lock);
299 list_for_each(stmp, &cifs_tcp_ses_list) {
300 server = list_entry(stmp, struct TCP_Server_Info,
301 tcp_ses_list);
302 list_for_each(tmp, &server->smb_ses_list) {
303 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
304 list_for_each(tmp1, &ses->tcon_list) {
305 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
306 cfids = tcon->cfids;
307 if (!cfids)
308 continue;
309 spin_lock(&cfids->cfid_list_lock); /* check lock ordering */
310 seq_printf(m, "Num entries: %d\n", cfids->num_entries);
311 list_for_each_entry(cfid, &cfids->entries, entry) {
312 seq_printf(m, "0x%x 0x%llx 0x%llx %s",
313 tcon->tid,
314 ses->Suid,
315 cfid->fid.persistent_fid,
316 cfid->path);
317 if (cfid->file_all_info_is_valid)
318 seq_printf(m, "\tvalid file info");
319 if (cfid->dirents.is_valid)
320 seq_printf(m, ", valid dirents");
321 seq_printf(m, "\n");
322 }
323 spin_unlock(&cfids->cfid_list_lock);
324 }
325 }
326 }
327 spin_unlock(&cifs_tcp_ses_lock);
328 seq_putc(m, '\n');
329 return 0;
330 }
331
compression_alg_str(__le16 alg)332 static __always_inline const char *compression_alg_str(__le16 alg)
333 {
334 switch (alg) {
335 case SMB3_COMPRESS_NONE:
336 return "NONE";
337 case SMB3_COMPRESS_LZNT1:
338 return "LZNT1";
339 case SMB3_COMPRESS_LZ77:
340 return "LZ77";
341 case SMB3_COMPRESS_LZ77_HUFF:
342 return "LZ77-Huffman";
343 case SMB3_COMPRESS_PATTERN:
344 return "Pattern_V1";
345 default:
346 return "invalid";
347 }
348 }
349
cipher_alg_str(__le16 cipher)350 static __always_inline const char *cipher_alg_str(__le16 cipher)
351 {
352 switch (cipher) {
353 case SMB2_ENCRYPTION_AES128_CCM:
354 return "AES128-CCM";
355 case SMB2_ENCRYPTION_AES128_GCM:
356 return "AES128-GCM";
357 case SMB2_ENCRYPTION_AES256_CCM:
358 return "AES256-CCM";
359 case SMB2_ENCRYPTION_AES256_GCM:
360 return "AES256-GCM";
361 default:
362 return "UNKNOWN";
363 }
364 }
365
cifs_debug_data_proc_show(struct seq_file * m,void * v)366 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
367 {
368 struct mid_q_entry *mid_entry;
369 struct TCP_Server_Info *server;
370 struct TCP_Server_Info *chan_server;
371 struct cifs_ses *ses;
372 struct cifs_tcon *tcon;
373 struct cifs_server_iface *iface;
374 size_t iface_weight = 0, iface_min_speed = 0;
375 struct cifs_server_iface *last_iface = NULL;
376 int c, i, j;
377
378 seq_puts(m,
379 "Display Internal CIFS Data Structures for Debugging\n"
380 "---------------------------------------------------\n");
381 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
382 seq_printf(m, "Features:");
383 #ifdef CONFIG_CIFS_DFS_UPCALL
384 seq_printf(m, " DFS");
385 #endif
386 #ifdef CONFIG_CIFS_FSCACHE
387 seq_printf(m, ",FSCACHE");
388 #endif
389 #ifdef CONFIG_CIFS_SMB_DIRECT
390 seq_printf(m, ",SMB_DIRECT");
391 #endif
392 #ifdef CONFIG_CIFS_STATS2
393 seq_printf(m, ",STATS2");
394 #else
395 seq_printf(m, ",STATS");
396 #endif
397 #ifdef CONFIG_CIFS_DEBUG2
398 seq_printf(m, ",DEBUG2");
399 #elif defined(CONFIG_CIFS_DEBUG)
400 seq_printf(m, ",DEBUG");
401 #endif
402 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
403 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
404 #endif
405 #ifdef CONFIG_CIFS_POSIX
406 seq_printf(m, ",CIFS_POSIX");
407 #endif
408 #ifdef CONFIG_CIFS_UPCALL
409 seq_printf(m, ",UPCALL(SPNEGO)");
410 #endif
411 #ifdef CONFIG_CIFS_XATTR
412 seq_printf(m, ",XATTR");
413 #endif
414 seq_printf(m, ",ACL");
415 #ifdef CONFIG_CIFS_SWN_UPCALL
416 seq_puts(m, ",WITNESS");
417 #endif
418 #ifdef CONFIG_CIFS_COMPRESSION
419 seq_puts(m, ",COMPRESSION");
420 #endif
421 seq_putc(m, '\n');
422 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
423 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
424
425 seq_printf(m, "\nServers: ");
426
427 c = 0;
428 spin_lock(&cifs_tcp_ses_lock);
429 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
430 #ifdef CONFIG_CIFS_SMB_DIRECT
431 struct smbdirect_socket *sc;
432 struct smbdirect_socket_parameters *sp;
433 #endif
434
435 /* channel info will be printed as a part of sessions below */
436 if (SERVER_IS_CHAN(server))
437 continue;
438
439 c++;
440 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
441 c, server->conn_id);
442
443 spin_lock(&server->srv_lock);
444 if (server->hostname)
445 seq_printf(m, "Hostname: %s ", server->hostname);
446 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
447 spin_unlock(&server->srv_lock);
448 #ifdef CONFIG_CIFS_SMB_DIRECT
449 if (!server->rdma)
450 goto skip_rdma;
451
452 if (!server->smbd_conn) {
453 seq_printf(m, "\nSMBDirect transport not available");
454 goto skip_rdma;
455 }
456 sc = &server->smbd_conn->socket;
457 sp = &sc->parameters;
458
459 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
460 "transport status: %x",
461 server->smbd_conn->protocol,
462 server->smbd_conn->socket.status);
463 seq_printf(m, "\nConn receive_credit_max: %x "
464 "send_credit_target: %x max_send_size: %x",
465 sp->recv_credit_max,
466 sp->send_credit_target,
467 sp->max_send_size);
468 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
469 "max_fragmented_send_size: %x max_receive_size:%x",
470 sp->max_fragmented_recv_size,
471 sp->max_fragmented_send_size,
472 sp->max_recv_size);
473 seq_printf(m, "\nConn keep_alive_interval: %x "
474 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
475 sp->keepalive_interval_msec * 1000,
476 sp->max_read_write_size,
477 server->smbd_conn->rdma_readwrite_threshold);
478 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
479 "count_put_receive_buffer: %x count_send_empty: %x",
480 server->smbd_conn->count_get_receive_buffer,
481 server->smbd_conn->count_put_receive_buffer,
482 server->smbd_conn->count_send_empty);
483 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
484 "count_enqueue_reassembly_queue: %x "
485 "count_dequeue_reassembly_queue: %x "
486 "reassembly_data_length: %x "
487 "reassembly_queue_length: %x",
488 server->smbd_conn->count_reassembly_queue,
489 server->smbd_conn->count_enqueue_reassembly_queue,
490 server->smbd_conn->count_dequeue_reassembly_queue,
491 sc->recv_io.reassembly.data_length,
492 sc->recv_io.reassembly.queue_length);
493 seq_printf(m, "\nCurrent Credits send_credits: %x "
494 "receive_credits: %x receive_credit_target: %x",
495 atomic_read(&server->smbd_conn->send_credits),
496 atomic_read(&server->smbd_conn->receive_credits),
497 server->smbd_conn->receive_credit_target);
498 seq_printf(m, "\nPending send_pending: %x ",
499 atomic_read(&server->smbd_conn->send_pending));
500 seq_printf(m, "\nReceive buffers count_receive_queue: %x ",
501 server->smbd_conn->count_receive_queue);
502 seq_printf(m, "\nMR responder_resources: %x "
503 "max_frmr_depth: %x mr_type: %x",
504 server->smbd_conn->responder_resources,
505 server->smbd_conn->max_frmr_depth,
506 server->smbd_conn->mr_type);
507 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
508 atomic_read(&server->smbd_conn->mr_ready_count),
509 atomic_read(&server->smbd_conn->mr_used_count));
510 skip_rdma:
511 #endif
512 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
513 server->credits,
514 server->echo_credits,
515 server->oplock_credits,
516 server->dialect);
517 if (server->sign)
518 seq_printf(m, " signed");
519 if (server->posix_ext_supported)
520 seq_printf(m, " posix");
521 if (server->nosharesock)
522 seq_printf(m, " nosharesock");
523
524 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities);
525
526 if (server->rdma)
527 seq_printf(m, "\nRDMA ");
528 seq_printf(m, "\nTCP status: %d Instance: %d"
529 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
530 server->tcpStatus,
531 server->reconnect_instance,
532 server->srv_count,
533 server->sec_mode, in_flight(server));
534 #ifdef CONFIG_NET_NS
535 if (server->net)
536 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
537 #endif /* NET_NS */
538
539 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
540 atomic_read(&server->in_send),
541 atomic_read(&server->num_waiters));
542
543 if (server->leaf_fullpath) {
544 seq_printf(m, "\nDFS leaf full path: %s",
545 server->leaf_fullpath);
546 }
547
548 seq_puts(m, "\nCompression: ");
549 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION))
550 seq_puts(m, "no built-in support");
551 else if (!server->compression.requested)
552 seq_puts(m, "disabled on mount");
553 else if (server->compression.enabled)
554 seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg));
555 else
556 seq_puts(m, "disabled (not supported by this server)");
557
558 /* Show negotiated encryption cipher, even if not required */
559 seq_puts(m, "\nEncryption: ");
560 if (server->cipher_type)
561 seq_printf(m, "Negotiated cipher (%s)", cipher_alg_str(server->cipher_type));
562
563 seq_printf(m, "\n\n\tSessions: ");
564 i = 0;
565 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
566 spin_lock(&ses->ses_lock);
567 if (ses->ses_status == SES_EXITING) {
568 spin_unlock(&ses->ses_lock);
569 continue;
570 }
571 i++;
572 if ((ses->serverDomain == NULL) ||
573 (ses->serverOS == NULL) ||
574 (ses->serverNOS == NULL)) {
575 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
576 i, ses->ip_addr, ses->ses_count,
577 ses->capabilities, ses->ses_status);
578 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
579 seq_printf(m, "Guest ");
580 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
581 seq_printf(m, "Anonymous ");
582 } else {
583 seq_printf(m,
584 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
585 "\n\tNOS: %s\tCapability: 0x%x"
586 "\n\tSMB session status: %d ",
587 i, ses->ip_addr, ses->serverDomain,
588 ses->ses_count, ses->serverOS, ses->serverNOS,
589 ses->capabilities, ses->ses_status);
590 }
591 if (ses->expired_pwd)
592 seq_puts(m, "password no longer valid ");
593 spin_unlock(&ses->ses_lock);
594
595 seq_printf(m, "\n\tSecurity type: %s ",
596 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
597
598 /* dump session id helpful for use with network trace */
599 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
600 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
601 seq_puts(m, " encrypted");
602 if (ses->sign)
603 seq_puts(m, " signed");
604
605 seq_printf(m, "\n\tUser: %d Cred User: %d",
606 from_kuid(&init_user_ns, ses->linux_uid),
607 from_kuid(&init_user_ns, ses->cred_uid));
608
609 if (ses->dfs_root_ses) {
610 seq_printf(m, "\n\tDFS root session id: 0x%llx",
611 ses->dfs_root_ses->Suid);
612 }
613
614 spin_lock(&ses->chan_lock);
615 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
616 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
617 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
618 seq_puts(m, "\t[RECONNECTING] ");
619
620 if (ses->chan_count > 1) {
621 seq_printf(m, "\n\n\tExtra Channels: %zu ",
622 ses->chan_count-1);
623 for (j = 1; j < ses->chan_count; j++) {
624 cifs_dump_channel(m, j, &ses->chans[j]);
625 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
626 seq_puts(m, "\tDISCONNECTED ");
627 if (CIFS_CHAN_IN_RECONNECT(ses, j))
628 seq_puts(m, "\t[RECONNECTING] ");
629 }
630 }
631 spin_unlock(&ses->chan_lock);
632
633 seq_puts(m, "\n\n\tShares: ");
634 j = 0;
635
636 seq_printf(m, "\n\t%d) IPC: ", j);
637 if (ses->tcon_ipc)
638 cifs_debug_tcon(m, ses->tcon_ipc);
639 else
640 seq_puts(m, "none\n");
641
642 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
643 ++j;
644 seq_printf(m, "\n\t%d) ", j);
645 cifs_debug_tcon(m, tcon);
646 }
647
648 spin_lock(&ses->iface_lock);
649 if (ses->iface_count)
650 seq_printf(m, "\n\n\tServer interfaces: %zu"
651 "\tLast updated: %lu seconds ago",
652 ses->iface_count,
653 (jiffies - ses->iface_last_update) / HZ);
654
655 last_iface = list_last_entry(&ses->iface_list,
656 struct cifs_server_iface,
657 iface_head);
658 iface_min_speed = last_iface->speed;
659
660 j = 0;
661 list_for_each_entry(iface, &ses->iface_list,
662 iface_head) {
663 seq_printf(m, "\n\t%d)", ++j);
664 cifs_dump_iface(m, iface);
665
666 iface_weight = iface->speed / iface_min_speed;
667 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
668 "\n\t\tAllocated channels: %u\n",
669 iface->weight_fulfilled,
670 iface_weight,
671 iface->num_channels);
672
673 if (is_ses_using_iface(ses, iface))
674 seq_puts(m, "\t\t[CONNECTED]\n");
675 }
676 spin_unlock(&ses->iface_lock);
677
678 seq_puts(m, "\n\n\tMIDs: ");
679 spin_lock(&ses->chan_lock);
680 for (j = 0; j < ses->chan_count; j++) {
681 chan_server = ses->chans[j].server;
682 if (!chan_server)
683 continue;
684
685 if (list_empty(&chan_server->pending_mid_q))
686 continue;
687
688 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
689 chan_server->conn_id);
690 spin_lock(&chan_server->mid_queue_lock);
691 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
692 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
693 mid_entry->mid_state,
694 le16_to_cpu(mid_entry->command),
695 mid_entry->pid,
696 mid_entry->callback_data,
697 mid_entry->mid);
698 }
699 spin_unlock(&chan_server->mid_queue_lock);
700 }
701 spin_unlock(&ses->chan_lock);
702 seq_puts(m, "\n--\n");
703 }
704 if (i == 0)
705 seq_printf(m, "\n\t\t[NONE]");
706 }
707 if (c == 0)
708 seq_printf(m, "\n\t[NONE]");
709
710 spin_unlock(&cifs_tcp_ses_lock);
711 seq_putc(m, '\n');
712 cifs_swn_dump(m);
713
714 /* BB add code to dump additional info such as TCP session info now */
715 return 0;
716 }
717
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)718 static ssize_t cifs_stats_proc_write(struct file *file,
719 const char __user *buffer, size_t count, loff_t *ppos)
720 {
721 bool bv;
722 int rc;
723 struct TCP_Server_Info *server;
724 struct cifs_ses *ses;
725 struct cifs_tcon *tcon;
726
727 rc = kstrtobool_from_user(buffer, count, &bv);
728 if (rc == 0) {
729 #ifdef CONFIG_CIFS_STATS2
730 int i;
731
732 atomic_set(&total_buf_alloc_count, 0);
733 atomic_set(&total_small_buf_alloc_count, 0);
734 #endif /* CONFIG_CIFS_STATS2 */
735 atomic_set(&tcpSesReconnectCount, 0);
736 atomic_set(&tconInfoReconnectCount, 0);
737
738 spin_lock(&GlobalMid_Lock);
739 GlobalMaxActiveXid = 0;
740 GlobalCurrentXid = 0;
741 spin_unlock(&GlobalMid_Lock);
742 spin_lock(&cifs_tcp_ses_lock);
743 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
744 server->max_in_flight = 0;
745 #ifdef CONFIG_CIFS_STATS2
746 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
747 atomic_set(&server->num_cmds[i], 0);
748 atomic_set(&server->smb2slowcmd[i], 0);
749 server->time_per_cmd[i] = 0;
750 server->slowest_cmd[i] = 0;
751 server->fastest_cmd[0] = 0;
752 }
753 #endif /* CONFIG_CIFS_STATS2 */
754 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
755 if (cifs_ses_exiting(ses))
756 continue;
757 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
758 atomic_set(&tcon->num_smbs_sent, 0);
759 spin_lock(&tcon->stat_lock);
760 tcon->bytes_read = 0;
761 tcon->bytes_written = 0;
762 tcon->stats_from_time = ktime_get_real_seconds();
763 spin_unlock(&tcon->stat_lock);
764 if (server->ops->clear_stats)
765 server->ops->clear_stats(tcon);
766 }
767 }
768 }
769 spin_unlock(&cifs_tcp_ses_lock);
770 } else {
771 return rc;
772 }
773
774 return count;
775 }
776
cifs_stats_proc_show(struct seq_file * m,void * v)777 static int cifs_stats_proc_show(struct seq_file *m, void *v)
778 {
779 int i;
780 #ifdef CONFIG_CIFS_STATS2
781 int j;
782 #endif /* STATS2 */
783 struct TCP_Server_Info *server;
784 struct cifs_ses *ses;
785 struct cifs_tcon *tcon;
786
787 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
788 sesInfoAllocCount.counter);
789 seq_printf(m, "Share (unique mount targets): %d\n",
790 tconInfoAllocCount.counter);
791 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
792 buf_alloc_count.counter,
793 cifs_min_rcv + tcpSesAllocCount.counter);
794 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
795 small_buf_alloc_count.counter, cifs_min_small);
796 #ifdef CONFIG_CIFS_STATS2
797 seq_printf(m, "Total Large %d Small %d Allocations\n",
798 atomic_read(&total_buf_alloc_count),
799 atomic_read(&total_small_buf_alloc_count));
800 #endif /* CONFIG_CIFS_STATS2 */
801
802 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
803 seq_printf(m,
804 "\n%d session %d share reconnects\n",
805 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
806
807 seq_printf(m,
808 "Total vfs operations: %d maximum at one time: %d\n",
809 GlobalCurrentXid, GlobalMaxActiveXid);
810
811 i = 0;
812 spin_lock(&cifs_tcp_ses_lock);
813 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
814 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
815 #ifdef CONFIG_CIFS_STATS2
816 seq_puts(m, "\nTotal time spent processing by command. Time ");
817 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
818 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
819 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
820 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
821 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
822 atomic_read(&server->num_cmds[j]),
823 server->time_per_cmd[j],
824 server->fastest_cmd[j],
825 server->slowest_cmd[j]);
826 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
827 if (atomic_read(&server->smb2slowcmd[j])) {
828 spin_lock(&server->srv_lock);
829 seq_printf(m, " %d slow responses from %s for command %d\n",
830 atomic_read(&server->smb2slowcmd[j]),
831 server->hostname, j);
832 spin_unlock(&server->srv_lock);
833 }
834 #endif /* STATS2 */
835 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
836 if (cifs_ses_exiting(ses))
837 continue;
838 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
839 i++;
840 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
841 if (tcon->need_reconnect)
842 seq_puts(m, "\tDISCONNECTED ");
843 seq_printf(m, "\nSMBs: %d since %ptTs UTC",
844 atomic_read(&tcon->num_smbs_sent),
845 &tcon->stats_from_time);
846 if (server->ops->print_stats)
847 server->ops->print_stats(m, tcon);
848 }
849 }
850 }
851 spin_unlock(&cifs_tcp_ses_lock);
852
853 seq_putc(m, '\n');
854 return 0;
855 }
856
cifs_stats_proc_open(struct inode * inode,struct file * file)857 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
858 {
859 return single_open(file, cifs_stats_proc_show, NULL);
860 }
861
862 static const struct proc_ops cifs_stats_proc_ops = {
863 .proc_open = cifs_stats_proc_open,
864 .proc_read = seq_read,
865 .proc_lseek = seq_lseek,
866 .proc_release = single_release,
867 .proc_write = cifs_stats_proc_write,
868 };
869
870 #ifdef CONFIG_CIFS_SMB_DIRECT
871 #define PROC_FILE_DEFINE(name) \
872 static ssize_t name##_write(struct file *file, const char __user *buffer, \
873 size_t count, loff_t *ppos) \
874 { \
875 int rc; \
876 rc = kstrtoint_from_user(buffer, count, 10, &name); \
877 if (rc) \
878 return rc; \
879 return count; \
880 } \
881 static int name##_proc_show(struct seq_file *m, void *v) \
882 { \
883 seq_printf(m, "%d\n", name); \
884 return 0; \
885 } \
886 static int name##_open(struct inode *inode, struct file *file) \
887 { \
888 return single_open(file, name##_proc_show, NULL); \
889 } \
890 \
891 static const struct proc_ops cifs_##name##_proc_fops = { \
892 .proc_open = name##_open, \
893 .proc_read = seq_read, \
894 .proc_lseek = seq_lseek, \
895 .proc_release = single_release, \
896 .proc_write = name##_write, \
897 }
898
899 PROC_FILE_DEFINE(rdma_readwrite_threshold);
900 PROC_FILE_DEFINE(smbd_max_frmr_depth);
901 PROC_FILE_DEFINE(smbd_keep_alive_interval);
902 PROC_FILE_DEFINE(smbd_max_receive_size);
903 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
904 PROC_FILE_DEFINE(smbd_max_send_size);
905 PROC_FILE_DEFINE(smbd_send_credit_target);
906 PROC_FILE_DEFINE(smbd_receive_credit_max);
907 #endif
908
909 static struct proc_dir_entry *proc_fs_cifs;
910 static const struct proc_ops cifsFYI_proc_ops;
911 static const struct proc_ops cifs_lookup_cache_proc_ops;
912 static const struct proc_ops traceSMB_proc_ops;
913 static const struct proc_ops cifs_security_flags_proc_ops;
914 static const struct proc_ops cifs_linux_ext_proc_ops;
915 static const struct proc_ops cifs_mount_params_proc_ops;
916
917 void
cifs_proc_init(void)918 cifs_proc_init(void)
919 {
920 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
921 if (proc_fs_cifs == NULL)
922 return;
923
924 proc_create_single("DebugData", 0, proc_fs_cifs,
925 cifs_debug_data_proc_show);
926
927 proc_create_single("open_files", 0400, proc_fs_cifs,
928 cifs_debug_files_proc_show);
929
930 proc_create_single("open_dirs", 0400, proc_fs_cifs,
931 cifs_debug_dirs_proc_show);
932
933 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
934 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
935 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
936 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
937 &cifs_linux_ext_proc_ops);
938 proc_create("SecurityFlags", 0644, proc_fs_cifs,
939 &cifs_security_flags_proc_ops);
940 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
941 &cifs_lookup_cache_proc_ops);
942
943 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
944
945 #ifdef CONFIG_CIFS_DFS_UPCALL
946 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
947 #endif
948
949 #ifdef CONFIG_CIFS_SMB_DIRECT
950 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
951 &cifs_rdma_readwrite_threshold_proc_fops);
952 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
953 &cifs_smbd_max_frmr_depth_proc_fops);
954 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
955 &cifs_smbd_keep_alive_interval_proc_fops);
956 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
957 &cifs_smbd_max_receive_size_proc_fops);
958 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
959 &cifs_smbd_max_fragmented_recv_size_proc_fops);
960 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
961 &cifs_smbd_max_send_size_proc_fops);
962 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
963 &cifs_smbd_send_credit_target_proc_fops);
964 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
965 &cifs_smbd_receive_credit_max_proc_fops);
966 #endif
967 }
968
969 void
cifs_proc_clean(void)970 cifs_proc_clean(void)
971 {
972 if (proc_fs_cifs == NULL)
973 return;
974
975 remove_proc_entry("DebugData", proc_fs_cifs);
976 remove_proc_entry("open_files", proc_fs_cifs);
977 remove_proc_entry("open_dirs", proc_fs_cifs);
978 remove_proc_entry("cifsFYI", proc_fs_cifs);
979 remove_proc_entry("traceSMB", proc_fs_cifs);
980 remove_proc_entry("Stats", proc_fs_cifs);
981 remove_proc_entry("SecurityFlags", proc_fs_cifs);
982 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
983 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
984 remove_proc_entry("mount_params", proc_fs_cifs);
985
986 #ifdef CONFIG_CIFS_DFS_UPCALL
987 remove_proc_entry("dfscache", proc_fs_cifs);
988 #endif
989 #ifdef CONFIG_CIFS_SMB_DIRECT
990 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
991 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
992 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
993 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
994 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
995 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
996 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
997 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
998 #endif
999 remove_proc_entry("fs/cifs", NULL);
1000 }
1001
cifsFYI_proc_show(struct seq_file * m,void * v)1002 static int cifsFYI_proc_show(struct seq_file *m, void *v)
1003 {
1004 seq_printf(m, "%d\n", cifsFYI);
1005 return 0;
1006 }
1007
cifsFYI_proc_open(struct inode * inode,struct file * file)1008 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
1009 {
1010 return single_open(file, cifsFYI_proc_show, NULL);
1011 }
1012
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1013 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
1014 size_t count, loff_t *ppos)
1015 {
1016 char c[2] = { '\0' };
1017 bool bv;
1018 int rc;
1019
1020 rc = get_user(c[0], buffer);
1021 if (rc)
1022 return rc;
1023 if (kstrtobool(c, &bv) == 0)
1024 cifsFYI = bv;
1025 else if ((c[0] > '1') && (c[0] <= '9'))
1026 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
1027 else
1028 return -EINVAL;
1029
1030 return count;
1031 }
1032
1033 static const struct proc_ops cifsFYI_proc_ops = {
1034 .proc_open = cifsFYI_proc_open,
1035 .proc_read = seq_read,
1036 .proc_lseek = seq_lseek,
1037 .proc_release = single_release,
1038 .proc_write = cifsFYI_proc_write,
1039 };
1040
cifs_linux_ext_proc_show(struct seq_file * m,void * v)1041 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
1042 {
1043 seq_printf(m, "%d\n", linuxExtEnabled);
1044 return 0;
1045 }
1046
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)1047 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
1048 {
1049 return single_open(file, cifs_linux_ext_proc_show, NULL);
1050 }
1051
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1052 static ssize_t cifs_linux_ext_proc_write(struct file *file,
1053 const char __user *buffer, size_t count, loff_t *ppos)
1054 {
1055 int rc;
1056
1057 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
1058 if (rc)
1059 return rc;
1060
1061 return count;
1062 }
1063
1064 static const struct proc_ops cifs_linux_ext_proc_ops = {
1065 .proc_open = cifs_linux_ext_proc_open,
1066 .proc_read = seq_read,
1067 .proc_lseek = seq_lseek,
1068 .proc_release = single_release,
1069 .proc_write = cifs_linux_ext_proc_write,
1070 };
1071
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)1072 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
1073 {
1074 seq_printf(m, "%d\n", lookupCacheEnabled);
1075 return 0;
1076 }
1077
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)1078 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
1079 {
1080 return single_open(file, cifs_lookup_cache_proc_show, NULL);
1081 }
1082
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1083 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
1084 const char __user *buffer, size_t count, loff_t *ppos)
1085 {
1086 int rc;
1087
1088 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
1089 if (rc)
1090 return rc;
1091
1092 return count;
1093 }
1094
1095 static const struct proc_ops cifs_lookup_cache_proc_ops = {
1096 .proc_open = cifs_lookup_cache_proc_open,
1097 .proc_read = seq_read,
1098 .proc_lseek = seq_lseek,
1099 .proc_release = single_release,
1100 .proc_write = cifs_lookup_cache_proc_write,
1101 };
1102
traceSMB_proc_show(struct seq_file * m,void * v)1103 static int traceSMB_proc_show(struct seq_file *m, void *v)
1104 {
1105 seq_printf(m, "%d\n", traceSMB);
1106 return 0;
1107 }
1108
traceSMB_proc_open(struct inode * inode,struct file * file)1109 static int traceSMB_proc_open(struct inode *inode, struct file *file)
1110 {
1111 return single_open(file, traceSMB_proc_show, NULL);
1112 }
1113
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1114 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1115 size_t count, loff_t *ppos)
1116 {
1117 int rc;
1118
1119 rc = kstrtobool_from_user(buffer, count, &traceSMB);
1120 if (rc)
1121 return rc;
1122
1123 return count;
1124 }
1125
1126 static const struct proc_ops traceSMB_proc_ops = {
1127 .proc_open = traceSMB_proc_open,
1128 .proc_read = seq_read,
1129 .proc_lseek = seq_lseek,
1130 .proc_release = single_release,
1131 .proc_write = traceSMB_proc_write,
1132 };
1133
cifs_security_flags_proc_show(struct seq_file * m,void * v)1134 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1135 {
1136 seq_printf(m, "0x%x\n", global_secflags);
1137 return 0;
1138 }
1139
cifs_security_flags_proc_open(struct inode * inode,struct file * file)1140 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1141 {
1142 return single_open(file, cifs_security_flags_proc_show, NULL);
1143 }
1144
1145 /*
1146 * Ensure that if someone sets a MUST flag, that we disable all other MAY
1147 * flags except for the ones corresponding to the given MUST flag. If there are
1148 * multiple MUST flags, then try to prefer more secure ones.
1149 */
1150 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)1151 cifs_security_flags_handle_must_flags(unsigned int *flags)
1152 {
1153 unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL);
1154
1155 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1156 *flags = CIFSSEC_MUST_KRB5;
1157 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1158 *flags = CIFSSEC_MUST_NTLMSSP;
1159 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1160 *flags = CIFSSEC_MUST_NTLMV2;
1161
1162 *flags |= signflags;
1163 }
1164
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1165 static ssize_t cifs_security_flags_proc_write(struct file *file,
1166 const char __user *buffer, size_t count, loff_t *ppos)
1167 {
1168 int rc;
1169 unsigned int flags;
1170 char flags_string[12];
1171 bool bv;
1172
1173 if ((count < 1) || (count > 11))
1174 return -EINVAL;
1175
1176 memset(flags_string, 0, sizeof(flags_string));
1177
1178 if (copy_from_user(flags_string, buffer, count))
1179 return -EFAULT;
1180
1181 if (count < 3) {
1182 /* single char or single char followed by null */
1183 if (kstrtobool(flags_string, &bv) == 0) {
1184 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1185 return count;
1186 } else if (!isdigit(flags_string[0])) {
1187 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1188 flags_string);
1189 return -EINVAL;
1190 }
1191 }
1192
1193 /* else we have a number */
1194 rc = kstrtouint(flags_string, 0, &flags);
1195 if (rc) {
1196 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1197 flags_string);
1198 return rc;
1199 }
1200
1201 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1202
1203 if (flags == 0) {
1204 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1205 return -EINVAL;
1206 }
1207
1208 if (flags & ~CIFSSEC_MASK) {
1209 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1210 flags & ~CIFSSEC_MASK);
1211 return -EINVAL;
1212 }
1213
1214 cifs_security_flags_handle_must_flags(&flags);
1215
1216 /* flags look ok - update the global security flags for cifs module */
1217 global_secflags = flags;
1218 if (global_secflags & CIFSSEC_MUST_SIGN) {
1219 /* requiring signing implies signing is allowed */
1220 global_secflags |= CIFSSEC_MAY_SIGN;
1221 cifs_dbg(FYI, "packet signing now required\n");
1222 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1223 cifs_dbg(FYI, "packet signing disabled\n");
1224 }
1225 /* BB should we turn on MAY flags for other MUST options? */
1226 return count;
1227 }
1228
1229 static const struct proc_ops cifs_security_flags_proc_ops = {
1230 .proc_open = cifs_security_flags_proc_open,
1231 .proc_read = seq_read,
1232 .proc_lseek = seq_lseek,
1233 .proc_release = single_release,
1234 .proc_write = cifs_security_flags_proc_write,
1235 };
1236
1237 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file * m,void * v)1238 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1239 {
1240 const struct fs_parameter_spec *p;
1241 const char *type;
1242
1243 for (p = smb3_fs_parameters; p->name; p++) {
1244 /* cannot use switch with pointers... */
1245 if (!p->type) {
1246 if (p->flags == fs_param_neg_with_no)
1247 type = "noflag";
1248 else
1249 type = "flag";
1250 } else if (p->type == fs_param_is_bool)
1251 type = "bool";
1252 else if (p->type == fs_param_is_u32)
1253 type = "u32";
1254 else if (p->type == fs_param_is_u64)
1255 type = "u64";
1256 else if (p->type == fs_param_is_string)
1257 type = "string";
1258 else
1259 type = "unknown";
1260
1261 seq_printf(m, "%s:%s\n", p->name, type);
1262 }
1263
1264 return 0;
1265 }
1266
cifs_mount_params_proc_open(struct inode * inode,struct file * file)1267 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1268 {
1269 return single_open(file, cifs_mount_params_proc_show, NULL);
1270 }
1271
1272 static const struct proc_ops cifs_mount_params_proc_ops = {
1273 .proc_open = cifs_mount_params_proc_open,
1274 .proc_read = seq_read,
1275 .proc_lseek = seq_lseek,
1276 .proc_release = single_release,
1277 /* No need for write for now */
1278 /* .proc_write = cifs_mount_params_proc_write, */
1279 };
1280
1281 #else
cifs_proc_init(void)1282 inline void cifs_proc_init(void)
1283 {
1284 }
1285
cifs_proc_clean(void)1286 inline void cifs_proc_clean(void)
1287 {
1288 }
1289 #endif /* PROC_FS */
1290