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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
30void
31cifs_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
38void 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
53void 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
90static 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
136static void
137cifs_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
170static 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
212static void
213cifs_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
235static 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
281static 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));
419skip_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 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities);
440
441 if (server->rdma)
442 seq_printf(m, "\nRDMA ");
443 seq_printf(m, "\nTCP status: %d Instance: %d"
444 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
445 server->tcpStatus,
446 server->reconnect_instance,
447 server->srv_count,
448 server->sec_mode, in_flight(server));
449#ifdef CONFIG_NET_NS
450 if (server->net)
451 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
452#endif /* NET_NS */
453
454 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
455 atomic_read(&server->in_send),
456 atomic_read(&server->num_waiters));
457
458 if (server->leaf_fullpath) {
459 seq_printf(m, "\nDFS leaf full path: %s",
460 server->leaf_fullpath);
461 }
462
463 seq_printf(m, "\n\n\tSessions: ");
464 i = 0;
465 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
466 spin_lock(&ses->ses_lock);
467 if (ses->ses_status == SES_EXITING) {
468 spin_unlock(&ses->ses_lock);
469 continue;
470 }
471 i++;
472 if ((ses->serverDomain == NULL) ||
473 (ses->serverOS == NULL) ||
474 (ses->serverNOS == NULL)) {
475 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
476 i, ses->ip_addr, ses->ses_count,
477 ses->capabilities, ses->ses_status);
478 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
479 seq_printf(m, "Guest ");
480 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
481 seq_printf(m, "Anonymous ");
482 } else {
483 seq_printf(m,
484 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
485 "\n\tNOS: %s\tCapability: 0x%x"
486 "\n\tSMB session status: %d ",
487 i, ses->ip_addr, ses->serverDomain,
488 ses->ses_count, ses->serverOS, ses->serverNOS,
489 ses->capabilities, ses->ses_status);
490 }
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
620static 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 tcon->stats_from_time = ktime_get_real_seconds();
663 spin_unlock(&tcon->stat_lock);
664 if (server->ops->clear_stats)
665 server->ops->clear_stats(tcon);
666 }
667 }
668 }
669 spin_unlock(&cifs_tcp_ses_lock);
670 } else {
671 return rc;
672 }
673
674 return count;
675}
676
677static int cifs_stats_proc_show(struct seq_file *m, void *v)
678{
679 int i;
680#ifdef CONFIG_CIFS_STATS2
681 int j;
682#endif /* STATS2 */
683 struct TCP_Server_Info *server;
684 struct cifs_ses *ses;
685 struct cifs_tcon *tcon;
686
687 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
688 sesInfoAllocCount.counter);
689 seq_printf(m, "Share (unique mount targets): %d\n",
690 tconInfoAllocCount.counter);
691 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
692 buf_alloc_count.counter,
693 cifs_min_rcv + tcpSesAllocCount.counter);
694 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
695 small_buf_alloc_count.counter, cifs_min_small);
696#ifdef CONFIG_CIFS_STATS2
697 seq_printf(m, "Total Large %d Small %d Allocations\n",
698 atomic_read(&total_buf_alloc_count),
699 atomic_read(&total_small_buf_alloc_count));
700#endif /* CONFIG_CIFS_STATS2 */
701
702 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
703 seq_printf(m,
704 "\n%d session %d share reconnects\n",
705 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
706
707 seq_printf(m,
708 "Total vfs operations: %d maximum at one time: %d\n",
709 GlobalCurrentXid, GlobalMaxActiveXid);
710
711 i = 0;
712 spin_lock(&cifs_tcp_ses_lock);
713 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
714 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
715#ifdef CONFIG_CIFS_STATS2
716 seq_puts(m, "\nTotal time spent processing by command. Time ");
717 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
718 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
719 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
720 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
721 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
722 atomic_read(&server->num_cmds[j]),
723 server->time_per_cmd[j],
724 server->fastest_cmd[j],
725 server->slowest_cmd[j]);
726 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
727 if (atomic_read(&server->smb2slowcmd[j])) {
728 spin_lock(&server->srv_lock);
729 seq_printf(m, " %d slow responses from %s for command %d\n",
730 atomic_read(&server->smb2slowcmd[j]),
731 server->hostname, j);
732 spin_unlock(&server->srv_lock);
733 }
734#endif /* STATS2 */
735 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
736 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
737 i++;
738 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
739 if (tcon->need_reconnect)
740 seq_puts(m, "\tDISCONNECTED ");
741 seq_printf(m, "\nSMBs: %d since %ptTs UTC",
742 atomic_read(&tcon->num_smbs_sent),
743 &tcon->stats_from_time);
744 if (server->ops->print_stats)
745 server->ops->print_stats(m, tcon);
746 }
747 }
748 }
749 spin_unlock(&cifs_tcp_ses_lock);
750
751 seq_putc(m, '\n');
752 return 0;
753}
754
755static int cifs_stats_proc_open(struct inode *inode, struct file *file)
756{
757 return single_open(file, cifs_stats_proc_show, NULL);
758}
759
760static const struct proc_ops cifs_stats_proc_ops = {
761 .proc_open = cifs_stats_proc_open,
762 .proc_read = seq_read,
763 .proc_lseek = seq_lseek,
764 .proc_release = single_release,
765 .proc_write = cifs_stats_proc_write,
766};
767
768#ifdef CONFIG_CIFS_SMB_DIRECT
769#define PROC_FILE_DEFINE(name) \
770static ssize_t name##_write(struct file *file, const char __user *buffer, \
771 size_t count, loff_t *ppos) \
772{ \
773 int rc; \
774 rc = kstrtoint_from_user(buffer, count, 10, &name); \
775 if (rc) \
776 return rc; \
777 return count; \
778} \
779static int name##_proc_show(struct seq_file *m, void *v) \
780{ \
781 seq_printf(m, "%d\n", name); \
782 return 0; \
783} \
784static int name##_open(struct inode *inode, struct file *file) \
785{ \
786 return single_open(file, name##_proc_show, NULL); \
787} \
788\
789static const struct proc_ops cifs_##name##_proc_fops = { \
790 .proc_open = name##_open, \
791 .proc_read = seq_read, \
792 .proc_lseek = seq_lseek, \
793 .proc_release = single_release, \
794 .proc_write = name##_write, \
795}
796
797PROC_FILE_DEFINE(rdma_readwrite_threshold);
798PROC_FILE_DEFINE(smbd_max_frmr_depth);
799PROC_FILE_DEFINE(smbd_keep_alive_interval);
800PROC_FILE_DEFINE(smbd_max_receive_size);
801PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
802PROC_FILE_DEFINE(smbd_max_send_size);
803PROC_FILE_DEFINE(smbd_send_credit_target);
804PROC_FILE_DEFINE(smbd_receive_credit_max);
805#endif
806
807static struct proc_dir_entry *proc_fs_cifs;
808static const struct proc_ops cifsFYI_proc_ops;
809static const struct proc_ops cifs_lookup_cache_proc_ops;
810static const struct proc_ops traceSMB_proc_ops;
811static const struct proc_ops cifs_security_flags_proc_ops;
812static const struct proc_ops cifs_linux_ext_proc_ops;
813static const struct proc_ops cifs_mount_params_proc_ops;
814
815void
816cifs_proc_init(void)
817{
818 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
819 if (proc_fs_cifs == NULL)
820 return;
821
822 proc_create_single("DebugData", 0, proc_fs_cifs,
823 cifs_debug_data_proc_show);
824
825 proc_create_single("open_files", 0400, proc_fs_cifs,
826 cifs_debug_files_proc_show);
827
828 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
829 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
830 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
831 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
832 &cifs_linux_ext_proc_ops);
833 proc_create("SecurityFlags", 0644, proc_fs_cifs,
834 &cifs_security_flags_proc_ops);
835 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
836 &cifs_lookup_cache_proc_ops);
837
838 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
839
840#ifdef CONFIG_CIFS_DFS_UPCALL
841 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
842#endif
843
844#ifdef CONFIG_CIFS_SMB_DIRECT
845 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
846 &cifs_rdma_readwrite_threshold_proc_fops);
847 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
848 &cifs_smbd_max_frmr_depth_proc_fops);
849 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
850 &cifs_smbd_keep_alive_interval_proc_fops);
851 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
852 &cifs_smbd_max_receive_size_proc_fops);
853 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
854 &cifs_smbd_max_fragmented_recv_size_proc_fops);
855 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
856 &cifs_smbd_max_send_size_proc_fops);
857 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
858 &cifs_smbd_send_credit_target_proc_fops);
859 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
860 &cifs_smbd_receive_credit_max_proc_fops);
861#endif
862}
863
864void
865cifs_proc_clean(void)
866{
867 if (proc_fs_cifs == NULL)
868 return;
869
870 remove_proc_entry("DebugData", proc_fs_cifs);
871 remove_proc_entry("open_files", proc_fs_cifs);
872 remove_proc_entry("cifsFYI", proc_fs_cifs);
873 remove_proc_entry("traceSMB", proc_fs_cifs);
874 remove_proc_entry("Stats", proc_fs_cifs);
875 remove_proc_entry("SecurityFlags", proc_fs_cifs);
876 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
877 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
878 remove_proc_entry("mount_params", proc_fs_cifs);
879
880#ifdef CONFIG_CIFS_DFS_UPCALL
881 remove_proc_entry("dfscache", proc_fs_cifs);
882#endif
883#ifdef CONFIG_CIFS_SMB_DIRECT
884 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
885 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
886 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
887 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
888 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
889 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
890 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
891 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
892#endif
893 remove_proc_entry("fs/cifs", NULL);
894}
895
896static int cifsFYI_proc_show(struct seq_file *m, void *v)
897{
898 seq_printf(m, "%d\n", cifsFYI);
899 return 0;
900}
901
902static int cifsFYI_proc_open(struct inode *inode, struct file *file)
903{
904 return single_open(file, cifsFYI_proc_show, NULL);
905}
906
907static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
908 size_t count, loff_t *ppos)
909{
910 char c[2] = { '\0' };
911 bool bv;
912 int rc;
913
914 rc = get_user(c[0], buffer);
915 if (rc)
916 return rc;
917 if (kstrtobool(c, &bv) == 0)
918 cifsFYI = bv;
919 else if ((c[0] > '1') && (c[0] <= '9'))
920 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
921 else
922 return -EINVAL;
923
924 return count;
925}
926
927static const struct proc_ops cifsFYI_proc_ops = {
928 .proc_open = cifsFYI_proc_open,
929 .proc_read = seq_read,
930 .proc_lseek = seq_lseek,
931 .proc_release = single_release,
932 .proc_write = cifsFYI_proc_write,
933};
934
935static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
936{
937 seq_printf(m, "%d\n", linuxExtEnabled);
938 return 0;
939}
940
941static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
942{
943 return single_open(file, cifs_linux_ext_proc_show, NULL);
944}
945
946static ssize_t cifs_linux_ext_proc_write(struct file *file,
947 const char __user *buffer, size_t count, loff_t *ppos)
948{
949 int rc;
950
951 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
952 if (rc)
953 return rc;
954
955 return count;
956}
957
958static const struct proc_ops cifs_linux_ext_proc_ops = {
959 .proc_open = cifs_linux_ext_proc_open,
960 .proc_read = seq_read,
961 .proc_lseek = seq_lseek,
962 .proc_release = single_release,
963 .proc_write = cifs_linux_ext_proc_write,
964};
965
966static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
967{
968 seq_printf(m, "%d\n", lookupCacheEnabled);
969 return 0;
970}
971
972static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
973{
974 return single_open(file, cifs_lookup_cache_proc_show, NULL);
975}
976
977static ssize_t cifs_lookup_cache_proc_write(struct file *file,
978 const char __user *buffer, size_t count, loff_t *ppos)
979{
980 int rc;
981
982 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
983 if (rc)
984 return rc;
985
986 return count;
987}
988
989static const struct proc_ops cifs_lookup_cache_proc_ops = {
990 .proc_open = cifs_lookup_cache_proc_open,
991 .proc_read = seq_read,
992 .proc_lseek = seq_lseek,
993 .proc_release = single_release,
994 .proc_write = cifs_lookup_cache_proc_write,
995};
996
997static int traceSMB_proc_show(struct seq_file *m, void *v)
998{
999 seq_printf(m, "%d\n", traceSMB);
1000 return 0;
1001}
1002
1003static int traceSMB_proc_open(struct inode *inode, struct file *file)
1004{
1005 return single_open(file, traceSMB_proc_show, NULL);
1006}
1007
1008static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1009 size_t count, loff_t *ppos)
1010{
1011 int rc;
1012
1013 rc = kstrtobool_from_user(buffer, count, &traceSMB);
1014 if (rc)
1015 return rc;
1016
1017 return count;
1018}
1019
1020static const struct proc_ops traceSMB_proc_ops = {
1021 .proc_open = traceSMB_proc_open,
1022 .proc_read = seq_read,
1023 .proc_lseek = seq_lseek,
1024 .proc_release = single_release,
1025 .proc_write = traceSMB_proc_write,
1026};
1027
1028static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1029{
1030 seq_printf(m, "0x%x\n", global_secflags);
1031 return 0;
1032}
1033
1034static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1035{
1036 return single_open(file, cifs_security_flags_proc_show, NULL);
1037}
1038
1039/*
1040 * Ensure that if someone sets a MUST flag, that we disable all other MAY
1041 * flags except for the ones corresponding to the given MUST flag. If there are
1042 * multiple MUST flags, then try to prefer more secure ones.
1043 */
1044static void
1045cifs_security_flags_handle_must_flags(unsigned int *flags)
1046{
1047 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
1048
1049 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1050 *flags = CIFSSEC_MUST_KRB5;
1051 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1052 *flags = CIFSSEC_MUST_NTLMSSP;
1053 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1054 *flags = CIFSSEC_MUST_NTLMV2;
1055
1056 *flags |= signflags;
1057}
1058
1059static ssize_t cifs_security_flags_proc_write(struct file *file,
1060 const char __user *buffer, size_t count, loff_t *ppos)
1061{
1062 int rc;
1063 unsigned int flags;
1064 char flags_string[12];
1065 bool bv;
1066
1067 if ((count < 1) || (count > 11))
1068 return -EINVAL;
1069
1070 memset(flags_string, 0, 12);
1071
1072 if (copy_from_user(flags_string, buffer, count))
1073 return -EFAULT;
1074
1075 if (count < 3) {
1076 /* single char or single char followed by null */
1077 if (kstrtobool(flags_string, &bv) == 0) {
1078 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1079 return count;
1080 } else if (!isdigit(flags_string[0])) {
1081 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1082 flags_string);
1083 return -EINVAL;
1084 }
1085 }
1086
1087 /* else we have a number */
1088 rc = kstrtouint(flags_string, 0, &flags);
1089 if (rc) {
1090 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1091 flags_string);
1092 return rc;
1093 }
1094
1095 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1096
1097 if (flags == 0) {
1098 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1099 return -EINVAL;
1100 }
1101
1102 if (flags & ~CIFSSEC_MASK) {
1103 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1104 flags & ~CIFSSEC_MASK);
1105 return -EINVAL;
1106 }
1107
1108 cifs_security_flags_handle_must_flags(&flags);
1109
1110 /* flags look ok - update the global security flags for cifs module */
1111 global_secflags = flags;
1112 if (global_secflags & CIFSSEC_MUST_SIGN) {
1113 /* requiring signing implies signing is allowed */
1114 global_secflags |= CIFSSEC_MAY_SIGN;
1115 cifs_dbg(FYI, "packet signing now required\n");
1116 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1117 cifs_dbg(FYI, "packet signing disabled\n");
1118 }
1119 /* BB should we turn on MAY flags for other MUST options? */
1120 return count;
1121}
1122
1123static const struct proc_ops cifs_security_flags_proc_ops = {
1124 .proc_open = cifs_security_flags_proc_open,
1125 .proc_read = seq_read,
1126 .proc_lseek = seq_lseek,
1127 .proc_release = single_release,
1128 .proc_write = cifs_security_flags_proc_write,
1129};
1130
1131/* To make it easier to debug, can help to show mount params */
1132static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1133{
1134 const struct fs_parameter_spec *p;
1135 const char *type;
1136
1137 for (p = smb3_fs_parameters; p->name; p++) {
1138 /* cannot use switch with pointers... */
1139 if (!p->type) {
1140 if (p->flags == fs_param_neg_with_no)
1141 type = "noflag";
1142 else
1143 type = "flag";
1144 } else if (p->type == fs_param_is_bool)
1145 type = "bool";
1146 else if (p->type == fs_param_is_u32)
1147 type = "u32";
1148 else if (p->type == fs_param_is_u64)
1149 type = "u64";
1150 else if (p->type == fs_param_is_string)
1151 type = "string";
1152 else
1153 type = "unknown";
1154
1155 seq_printf(m, "%s:%s\n", p->name, type);
1156 }
1157
1158 return 0;
1159}
1160
1161static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1162{
1163 return single_open(file, cifs_mount_params_proc_show, NULL);
1164}
1165
1166static const struct proc_ops cifs_mount_params_proc_ops = {
1167 .proc_open = cifs_mount_params_proc_open,
1168 .proc_read = seq_read,
1169 .proc_lseek = seq_lseek,
1170 .proc_release = single_release,
1171 /* No need for write for now */
1172 /* .proc_write = cifs_mount_params_proc_write, */
1173};
1174
1175#else
1176inline void cifs_proc_init(void)
1177{
1178}
1179
1180inline void cifs_proc_clean(void)
1181{
1182}
1183#endif /* PROC_FS */