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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * fs/cifs_debug.c
4 *
5 * Copyright (C) International Business Machines Corp., 2000,2005
6 *
7 * Modified by Steve French (sfrench@us.ibm.com)
8 */
9#include <linux/fs.h>
10#include <linux/string.h>
11#include <linux/ctype.h>
12#include <linux/module.h>
13#include <linux/proc_fs.h>
14#include <linux/uaccess.h>
15#include "cifspdu.h"
16#include "cifsglob.h"
17#include "cifsproto.h"
18#include "cifs_debug.h"
19#include "cifsfs.h"
20#include "fs_context.h"
21#ifdef CONFIG_CIFS_DFS_UPCALL
22#include "dfs_cache.h"
23#endif
24#ifdef CONFIG_CIFS_SMB_DIRECT
25#include "smbdirect.h"
26#endif
27#include "cifs_swn.h"
28
29void
30cifs_dump_mem(char *label, void *data, int length)
31{
32 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
33 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
34 data, length, true);
35}
36
37void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
38{
39#ifdef CONFIG_CIFS_DEBUG2
40 struct smb_hdr *smb = (struct smb_hdr *)buf;
41
42 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
43 smb->Command, smb->Status.CifsError,
44 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
45 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
46 server->ops->calc_smb_size(smb, server));
47#endif /* CONFIG_CIFS_DEBUG2 */
48}
49
50void cifs_dump_mids(struct TCP_Server_Info *server)
51{
52#ifdef CONFIG_CIFS_DEBUG2
53 struct mid_q_entry *mid_entry;
54
55 if (server == NULL)
56 return;
57
58 cifs_dbg(VFS, "Dump pending requests:\n");
59 spin_lock(&GlobalMid_Lock);
60 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
61 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
62 mid_entry->mid_state,
63 le16_to_cpu(mid_entry->command),
64 mid_entry->pid,
65 mid_entry->callback_data,
66 mid_entry->mid);
67#ifdef CONFIG_CIFS_STATS2
68 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
69 mid_entry->large_buf,
70 mid_entry->resp_buf,
71 mid_entry->when_received,
72 jiffies);
73#endif /* STATS2 */
74 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
75 mid_entry->multiRsp, mid_entry->multiEnd);
76 if (mid_entry->resp_buf) {
77 cifs_dump_detail(mid_entry->resp_buf, server);
78 cifs_dump_mem("existing buf: ",
79 mid_entry->resp_buf, 62);
80 }
81 }
82 spin_unlock(&GlobalMid_Lock);
83#endif /* CONFIG_CIFS_DEBUG2 */
84}
85
86#ifdef CONFIG_PROC_FS
87static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
88{
89 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
90
91 seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
92 if (tcon->nativeFileSystem)
93 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
94 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
95 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
96 le32_to_cpu(tcon->fsAttrInfo.Attributes),
97 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
98 tcon->tidStatus);
99 if (dev_type == FILE_DEVICE_DISK)
100 seq_puts(m, " type: DISK ");
101 else if (dev_type == FILE_DEVICE_CD_ROM)
102 seq_puts(m, " type: CDROM ");
103 else
104 seq_printf(m, " type: %d ", dev_type);
105
106 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
107
108 if ((tcon->seal) ||
109 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
110 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
111 seq_printf(m, " Encrypted");
112 if (tcon->nocase)
113 seq_printf(m, " nocase");
114 if (tcon->unix_ext)
115 seq_printf(m, " POSIX Extensions");
116 if (tcon->ses->server->ops->dump_share_caps)
117 tcon->ses->server->ops->dump_share_caps(m, tcon);
118 if (tcon->use_witness)
119 seq_puts(m, " Witness");
120
121 if (tcon->need_reconnect)
122 seq_puts(m, "\tDISCONNECTED ");
123 seq_putc(m, '\n');
124}
125
126static void
127cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
128{
129 struct TCP_Server_Info *server = chan->server;
130
131 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
132 "\n\t\tNumber of credits: %d Dialect 0x%x"
133 "\n\t\tTCP status: %d Instance: %d"
134 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
135 "\n\t\tIn Send: %d In MaxReq Wait: %d",
136 i+1, server->conn_id,
137 server->credits,
138 server->dialect,
139 server->tcpStatus,
140 server->reconnect_instance,
141 server->srv_count,
142 server->sec_mode,
143 in_flight(server),
144 atomic_read(&server->in_send),
145 atomic_read(&server->num_waiters));
146}
147
148static void
149cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
150{
151 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
152 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
153
154 seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
155 seq_puts(m, "\t\tCapabilities: ");
156 if (iface->rdma_capable)
157 seq_puts(m, "rdma ");
158 if (iface->rss_capable)
159 seq_puts(m, "rss ");
160 seq_putc(m, '\n');
161 if (iface->sockaddr.ss_family == AF_INET)
162 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
163 else if (iface->sockaddr.ss_family == AF_INET6)
164 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
165}
166
167static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
168{
169 struct list_head *tmp, *tmp1, *tmp2;
170 struct TCP_Server_Info *server;
171 struct cifs_ses *ses;
172 struct cifs_tcon *tcon;
173 struct cifsFileInfo *cfile;
174
175 seq_puts(m, "# Version:1\n");
176 seq_puts(m, "# Format:\n");
177 seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
178#ifdef CONFIG_CIFS_DEBUG2
179 seq_printf(m, " <filename> <mid>\n");
180#else
181 seq_printf(m, " <filename>\n");
182#endif /* CIFS_DEBUG2 */
183 spin_lock(&cifs_tcp_ses_lock);
184 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
185 list_for_each(tmp, &server->smb_ses_list) {
186 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
187 list_for_each(tmp1, &ses->tcon_list) {
188 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
189 spin_lock(&tcon->open_file_lock);
190 list_for_each(tmp2, &tcon->openFileList) {
191 cfile = list_entry(tmp2, struct cifsFileInfo,
192 tlist);
193 seq_printf(m,
194 "0x%x 0x%llx 0x%x %d %d %d %pd",
195 tcon->tid,
196 cfile->fid.persistent_fid,
197 cfile->f_flags,
198 cfile->count,
199 cfile->pid,
200 from_kuid(&init_user_ns, cfile->uid),
201 cfile->dentry);
202#ifdef CONFIG_CIFS_DEBUG2
203 seq_printf(m, " %llu\n", cfile->fid.mid);
204#else
205 seq_printf(m, "\n");
206#endif /* CIFS_DEBUG2 */
207 }
208 spin_unlock(&tcon->open_file_lock);
209 }
210 }
211 }
212 spin_unlock(&cifs_tcp_ses_lock);
213 seq_putc(m, '\n');
214 return 0;
215}
216
217static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
218{
219 struct list_head *tmp2, *tmp3;
220 struct mid_q_entry *mid_entry;
221 struct TCP_Server_Info *server;
222 struct cifs_ses *ses;
223 struct cifs_tcon *tcon;
224 int c, i, j;
225
226 seq_puts(m,
227 "Display Internal CIFS Data Structures for Debugging\n"
228 "---------------------------------------------------\n");
229 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
230 seq_printf(m, "Features:");
231#ifdef CONFIG_CIFS_DFS_UPCALL
232 seq_printf(m, " DFS");
233#endif
234#ifdef CONFIG_CIFS_FSCACHE
235 seq_printf(m, ",FSCACHE");
236#endif
237#ifdef CONFIG_CIFS_SMB_DIRECT
238 seq_printf(m, ",SMB_DIRECT");
239#endif
240#ifdef CONFIG_CIFS_STATS2
241 seq_printf(m, ",STATS2");
242#else
243 seq_printf(m, ",STATS");
244#endif
245#ifdef CONFIG_CIFS_DEBUG2
246 seq_printf(m, ",DEBUG2");
247#elif defined(CONFIG_CIFS_DEBUG)
248 seq_printf(m, ",DEBUG");
249#endif
250#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
251 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
252#endif
253#ifdef CONFIG_CIFS_WEAK_PW_HASH
254 seq_printf(m, ",WEAK_PW_HASH");
255#endif
256#ifdef CONFIG_CIFS_POSIX
257 seq_printf(m, ",CIFS_POSIX");
258#endif
259#ifdef CONFIG_CIFS_UPCALL
260 seq_printf(m, ",UPCALL(SPNEGO)");
261#endif
262#ifdef CONFIG_CIFS_XATTR
263 seq_printf(m, ",XATTR");
264#endif
265 seq_printf(m, ",ACL");
266#ifdef CONFIG_CIFS_SWN_UPCALL
267 seq_puts(m, ",WITNESS");
268#endif
269 seq_putc(m, '\n');
270 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
271 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
272
273 seq_printf(m, "\nServers: ");
274
275 c = 0;
276 spin_lock(&cifs_tcp_ses_lock);
277 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
278 if (server->is_channel)
279 continue;
280
281 c++;
282 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
283 c, server->conn_id);
284
285 if (server->hostname)
286 seq_printf(m, "Hostname: %s ", server->hostname);
287#ifdef CONFIG_CIFS_SMB_DIRECT
288 if (!server->rdma)
289 goto skip_rdma;
290
291 if (!server->smbd_conn) {
292 seq_printf(m, "\nSMBDirect transport not available");
293 goto skip_rdma;
294 }
295
296 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
297 "transport status: %x",
298 server->smbd_conn->protocol,
299 server->smbd_conn->transport_status);
300 seq_printf(m, "\nConn receive_credit_max: %x "
301 "send_credit_target: %x max_send_size: %x",
302 server->smbd_conn->receive_credit_max,
303 server->smbd_conn->send_credit_target,
304 server->smbd_conn->max_send_size);
305 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
306 "max_fragmented_send_size: %x max_receive_size:%x",
307 server->smbd_conn->max_fragmented_recv_size,
308 server->smbd_conn->max_fragmented_send_size,
309 server->smbd_conn->max_receive_size);
310 seq_printf(m, "\nConn keep_alive_interval: %x "
311 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
312 server->smbd_conn->keep_alive_interval,
313 server->smbd_conn->max_readwrite_size,
314 server->smbd_conn->rdma_readwrite_threshold);
315 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
316 "count_put_receive_buffer: %x count_send_empty: %x",
317 server->smbd_conn->count_get_receive_buffer,
318 server->smbd_conn->count_put_receive_buffer,
319 server->smbd_conn->count_send_empty);
320 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
321 "count_enqueue_reassembly_queue: %x "
322 "count_dequeue_reassembly_queue: %x "
323 "fragment_reassembly_remaining: %x "
324 "reassembly_data_length: %x "
325 "reassembly_queue_length: %x",
326 server->smbd_conn->count_reassembly_queue,
327 server->smbd_conn->count_enqueue_reassembly_queue,
328 server->smbd_conn->count_dequeue_reassembly_queue,
329 server->smbd_conn->fragment_reassembly_remaining,
330 server->smbd_conn->reassembly_data_length,
331 server->smbd_conn->reassembly_queue_length);
332 seq_printf(m, "\nCurrent Credits send_credits: %x "
333 "receive_credits: %x receive_credit_target: %x",
334 atomic_read(&server->smbd_conn->send_credits),
335 atomic_read(&server->smbd_conn->receive_credits),
336 server->smbd_conn->receive_credit_target);
337 seq_printf(m, "\nPending send_pending: %x ",
338 atomic_read(&server->smbd_conn->send_pending));
339 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
340 "count_empty_packet_queue: %x",
341 server->smbd_conn->count_receive_queue,
342 server->smbd_conn->count_empty_packet_queue);
343 seq_printf(m, "\nMR responder_resources: %x "
344 "max_frmr_depth: %x mr_type: %x",
345 server->smbd_conn->responder_resources,
346 server->smbd_conn->max_frmr_depth,
347 server->smbd_conn->mr_type);
348 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
349 atomic_read(&server->smbd_conn->mr_ready_count),
350 atomic_read(&server->smbd_conn->mr_used_count));
351skip_rdma:
352#endif
353 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
354 server->credits, server->dialect);
355 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
356 seq_printf(m, " COMPRESS_LZNT1");
357 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
358 seq_printf(m, " COMPRESS_LZ77");
359 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
360 seq_printf(m, " COMPRESS_LZ77_HUFF");
361 if (server->sign)
362 seq_printf(m, " signed");
363 if (server->posix_ext_supported)
364 seq_printf(m, " posix");
365
366 if (server->rdma)
367 seq_printf(m, "\nRDMA ");
368 seq_printf(m, "\nTCP status: %d Instance: %d"
369 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
370 server->tcpStatus,
371 server->reconnect_instance,
372 server->srv_count,
373 server->sec_mode, in_flight(server));
374
375 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
376 atomic_read(&server->in_send),
377 atomic_read(&server->num_waiters));
378
379 seq_printf(m, "\n\n\tSessions: ");
380 i = 0;
381 list_for_each(tmp2, &server->smb_ses_list) {
382 ses = list_entry(tmp2, struct cifs_ses,
383 smb_ses_list);
384 i++;
385 if ((ses->serverDomain == NULL) ||
386 (ses->serverOS == NULL) ||
387 (ses->serverNOS == NULL)) {
388 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
389 i, ses->ip_addr, ses->ses_count,
390 ses->capabilities, ses->status);
391 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
392 seq_printf(m, "Guest ");
393 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
394 seq_printf(m, "Anonymous ");
395 } else {
396 seq_printf(m,
397 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
398 "\n\tNOS: %s\tCapability: 0x%x"
399 "\n\tSMB session status: %d ",
400 i, ses->ip_addr, ses->serverDomain,
401 ses->ses_count, ses->serverOS, ses->serverNOS,
402 ses->capabilities, ses->status);
403 }
404
405 seq_printf(m, "\n\tSecurity type: %s ",
406 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
407
408 /* dump session id helpful for use with network trace */
409 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
410 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
411 seq_puts(m, " encrypted");
412 if (ses->sign)
413 seq_puts(m, " signed");
414
415 seq_printf(m, "\n\tUser: %d Cred User: %d",
416 from_kuid(&init_user_ns, ses->linux_uid),
417 from_kuid(&init_user_ns, ses->cred_uid));
418
419 if (ses->chan_count > 1) {
420 seq_printf(m, "\n\n\tExtra Channels: %zu ",
421 ses->chan_count-1);
422 for (j = 1; j < ses->chan_count; j++)
423 cifs_dump_channel(m, j, &ses->chans[j]);
424 }
425
426 seq_puts(m, "\n\n\tShares: ");
427 j = 0;
428
429 seq_printf(m, "\n\t%d) IPC: ", j);
430 if (ses->tcon_ipc)
431 cifs_debug_tcon(m, ses->tcon_ipc);
432 else
433 seq_puts(m, "none\n");
434
435 list_for_each(tmp3, &ses->tcon_list) {
436 tcon = list_entry(tmp3, struct cifs_tcon,
437 tcon_list);
438 ++j;
439 seq_printf(m, "\n\t%d) ", j);
440 cifs_debug_tcon(m, tcon);
441 }
442
443 spin_lock(&ses->iface_lock);
444 if (ses->iface_count)
445 seq_printf(m, "\n\n\tServer interfaces: %zu",
446 ses->iface_count);
447 for (j = 0; j < ses->iface_count; j++) {
448 struct cifs_server_iface *iface;
449
450 iface = &ses->iface_list[j];
451 seq_printf(m, "\n\t%d)", j+1);
452 cifs_dump_iface(m, iface);
453 if (is_ses_using_iface(ses, iface))
454 seq_puts(m, "\t\t[CONNECTED]\n");
455 }
456 spin_unlock(&ses->iface_lock);
457 }
458 if (i == 0)
459 seq_printf(m, "\n\t\t[NONE]");
460
461 seq_puts(m, "\n\n\tMIDs: ");
462 spin_lock(&GlobalMid_Lock);
463 list_for_each(tmp3, &server->pending_mid_q) {
464 mid_entry = list_entry(tmp3, struct mid_q_entry,
465 qhead);
466 seq_printf(m, "\n\tState: %d com: %d pid:"
467 " %d cbdata: %p mid %llu\n",
468 mid_entry->mid_state,
469 le16_to_cpu(mid_entry->command),
470 mid_entry->pid,
471 mid_entry->callback_data,
472 mid_entry->mid);
473 }
474 spin_unlock(&GlobalMid_Lock);
475 seq_printf(m, "\n--\n");
476 }
477 if (c == 0)
478 seq_printf(m, "\n\t[NONE]");
479
480 spin_unlock(&cifs_tcp_ses_lock);
481 seq_putc(m, '\n');
482 cifs_swn_dump(m);
483
484 /* BB add code to dump additional info such as TCP session info now */
485 return 0;
486}
487
488static ssize_t cifs_stats_proc_write(struct file *file,
489 const char __user *buffer, size_t count, loff_t *ppos)
490{
491 bool bv;
492 int rc;
493 struct list_head *tmp1, *tmp2, *tmp3;
494 struct TCP_Server_Info *server;
495 struct cifs_ses *ses;
496 struct cifs_tcon *tcon;
497
498 rc = kstrtobool_from_user(buffer, count, &bv);
499 if (rc == 0) {
500#ifdef CONFIG_CIFS_STATS2
501 int i;
502
503 atomic_set(&totBufAllocCount, 0);
504 atomic_set(&totSmBufAllocCount, 0);
505#endif /* CONFIG_CIFS_STATS2 */
506 atomic_set(&tcpSesReconnectCount, 0);
507 atomic_set(&tconInfoReconnectCount, 0);
508
509 spin_lock(&GlobalMid_Lock);
510 GlobalMaxActiveXid = 0;
511 GlobalCurrentXid = 0;
512 spin_unlock(&GlobalMid_Lock);
513 spin_lock(&cifs_tcp_ses_lock);
514 list_for_each(tmp1, &cifs_tcp_ses_list) {
515 server = list_entry(tmp1, struct TCP_Server_Info,
516 tcp_ses_list);
517 server->max_in_flight = 0;
518#ifdef CONFIG_CIFS_STATS2
519 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
520 atomic_set(&server->num_cmds[i], 0);
521 atomic_set(&server->smb2slowcmd[i], 0);
522 server->time_per_cmd[i] = 0;
523 server->slowest_cmd[i] = 0;
524 server->fastest_cmd[0] = 0;
525 }
526#endif /* CONFIG_CIFS_STATS2 */
527 list_for_each(tmp2, &server->smb_ses_list) {
528 ses = list_entry(tmp2, struct cifs_ses,
529 smb_ses_list);
530 list_for_each(tmp3, &ses->tcon_list) {
531 tcon = list_entry(tmp3,
532 struct cifs_tcon,
533 tcon_list);
534 atomic_set(&tcon->num_smbs_sent, 0);
535 spin_lock(&tcon->stat_lock);
536 tcon->bytes_read = 0;
537 tcon->bytes_written = 0;
538 spin_unlock(&tcon->stat_lock);
539 if (server->ops->clear_stats)
540 server->ops->clear_stats(tcon);
541 }
542 }
543 }
544 spin_unlock(&cifs_tcp_ses_lock);
545 } else {
546 return rc;
547 }
548
549 return count;
550}
551
552static int cifs_stats_proc_show(struct seq_file *m, void *v)
553{
554 int i;
555#ifdef CONFIG_CIFS_STATS2
556 int j;
557#endif /* STATS2 */
558 struct list_head *tmp2, *tmp3;
559 struct TCP_Server_Info *server;
560 struct cifs_ses *ses;
561 struct cifs_tcon *tcon;
562
563 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
564 sesInfoAllocCount.counter);
565 seq_printf(m, "Share (unique mount targets): %d\n",
566 tconInfoAllocCount.counter);
567 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
568 bufAllocCount.counter,
569 cifs_min_rcv + tcpSesAllocCount.counter);
570 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
571 smBufAllocCount.counter, cifs_min_small);
572#ifdef CONFIG_CIFS_STATS2
573 seq_printf(m, "Total Large %d Small %d Allocations\n",
574 atomic_read(&totBufAllocCount),
575 atomic_read(&totSmBufAllocCount));
576#endif /* CONFIG_CIFS_STATS2 */
577
578 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
579 seq_printf(m,
580 "\n%d session %d share reconnects\n",
581 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
582
583 seq_printf(m,
584 "Total vfs operations: %d maximum at one time: %d\n",
585 GlobalCurrentXid, GlobalMaxActiveXid);
586
587 i = 0;
588 spin_lock(&cifs_tcp_ses_lock);
589 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
590 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
591#ifdef CONFIG_CIFS_STATS2
592 seq_puts(m, "\nTotal time spent processing by command. Time ");
593 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
594 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
595 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
596 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
597 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
598 atomic_read(&server->num_cmds[j]),
599 server->time_per_cmd[j],
600 server->fastest_cmd[j],
601 server->slowest_cmd[j]);
602 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
603 if (atomic_read(&server->smb2slowcmd[j]))
604 seq_printf(m, " %d slow responses from %s for command %d\n",
605 atomic_read(&server->smb2slowcmd[j]),
606 server->hostname, j);
607#endif /* STATS2 */
608 list_for_each(tmp2, &server->smb_ses_list) {
609 ses = list_entry(tmp2, struct cifs_ses,
610 smb_ses_list);
611 list_for_each(tmp3, &ses->tcon_list) {
612 tcon = list_entry(tmp3,
613 struct cifs_tcon,
614 tcon_list);
615 i++;
616 seq_printf(m, "\n%d) %s", i, tcon->treeName);
617 if (tcon->need_reconnect)
618 seq_puts(m, "\tDISCONNECTED ");
619 seq_printf(m, "\nSMBs: %d",
620 atomic_read(&tcon->num_smbs_sent));
621 if (server->ops->print_stats)
622 server->ops->print_stats(m, tcon);
623 }
624 }
625 }
626 spin_unlock(&cifs_tcp_ses_lock);
627
628 seq_putc(m, '\n');
629 return 0;
630}
631
632static int cifs_stats_proc_open(struct inode *inode, struct file *file)
633{
634 return single_open(file, cifs_stats_proc_show, NULL);
635}
636
637static const struct proc_ops cifs_stats_proc_ops = {
638 .proc_open = cifs_stats_proc_open,
639 .proc_read = seq_read,
640 .proc_lseek = seq_lseek,
641 .proc_release = single_release,
642 .proc_write = cifs_stats_proc_write,
643};
644
645#ifdef CONFIG_CIFS_SMB_DIRECT
646#define PROC_FILE_DEFINE(name) \
647static ssize_t name##_write(struct file *file, const char __user *buffer, \
648 size_t count, loff_t *ppos) \
649{ \
650 int rc; \
651 rc = kstrtoint_from_user(buffer, count, 10, & name); \
652 if (rc) \
653 return rc; \
654 return count; \
655} \
656static int name##_proc_show(struct seq_file *m, void *v) \
657{ \
658 seq_printf(m, "%d\n", name ); \
659 return 0; \
660} \
661static int name##_open(struct inode *inode, struct file *file) \
662{ \
663 return single_open(file, name##_proc_show, NULL); \
664} \
665\
666static const struct proc_ops cifs_##name##_proc_fops = { \
667 .proc_open = name##_open, \
668 .proc_read = seq_read, \
669 .proc_lseek = seq_lseek, \
670 .proc_release = single_release, \
671 .proc_write = name##_write, \
672}
673
674PROC_FILE_DEFINE(rdma_readwrite_threshold);
675PROC_FILE_DEFINE(smbd_max_frmr_depth);
676PROC_FILE_DEFINE(smbd_keep_alive_interval);
677PROC_FILE_DEFINE(smbd_max_receive_size);
678PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
679PROC_FILE_DEFINE(smbd_max_send_size);
680PROC_FILE_DEFINE(smbd_send_credit_target);
681PROC_FILE_DEFINE(smbd_receive_credit_max);
682#endif
683
684static struct proc_dir_entry *proc_fs_cifs;
685static const struct proc_ops cifsFYI_proc_ops;
686static const struct proc_ops cifs_lookup_cache_proc_ops;
687static const struct proc_ops traceSMB_proc_ops;
688static const struct proc_ops cifs_security_flags_proc_ops;
689static const struct proc_ops cifs_linux_ext_proc_ops;
690static const struct proc_ops cifs_mount_params_proc_ops;
691
692void
693cifs_proc_init(void)
694{
695 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
696 if (proc_fs_cifs == NULL)
697 return;
698
699 proc_create_single("DebugData", 0, proc_fs_cifs,
700 cifs_debug_data_proc_show);
701
702 proc_create_single("open_files", 0400, proc_fs_cifs,
703 cifs_debug_files_proc_show);
704
705 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
706 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
707 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
708 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
709 &cifs_linux_ext_proc_ops);
710 proc_create("SecurityFlags", 0644, proc_fs_cifs,
711 &cifs_security_flags_proc_ops);
712 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
713 &cifs_lookup_cache_proc_ops);
714
715 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
716
717#ifdef CONFIG_CIFS_DFS_UPCALL
718 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
719#endif
720
721#ifdef CONFIG_CIFS_SMB_DIRECT
722 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
723 &cifs_rdma_readwrite_threshold_proc_fops);
724 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
725 &cifs_smbd_max_frmr_depth_proc_fops);
726 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
727 &cifs_smbd_keep_alive_interval_proc_fops);
728 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
729 &cifs_smbd_max_receive_size_proc_fops);
730 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
731 &cifs_smbd_max_fragmented_recv_size_proc_fops);
732 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
733 &cifs_smbd_max_send_size_proc_fops);
734 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
735 &cifs_smbd_send_credit_target_proc_fops);
736 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
737 &cifs_smbd_receive_credit_max_proc_fops);
738#endif
739}
740
741void
742cifs_proc_clean(void)
743{
744 if (proc_fs_cifs == NULL)
745 return;
746
747 remove_proc_entry("DebugData", proc_fs_cifs);
748 remove_proc_entry("open_files", proc_fs_cifs);
749 remove_proc_entry("cifsFYI", proc_fs_cifs);
750 remove_proc_entry("traceSMB", proc_fs_cifs);
751 remove_proc_entry("Stats", proc_fs_cifs);
752 remove_proc_entry("SecurityFlags", proc_fs_cifs);
753 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
754 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
755 remove_proc_entry("mount_params", proc_fs_cifs);
756
757#ifdef CONFIG_CIFS_DFS_UPCALL
758 remove_proc_entry("dfscache", proc_fs_cifs);
759#endif
760#ifdef CONFIG_CIFS_SMB_DIRECT
761 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
762 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
763 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
764 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
765 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
766 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
767 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
768 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
769#endif
770 remove_proc_entry("fs/cifs", NULL);
771}
772
773static int cifsFYI_proc_show(struct seq_file *m, void *v)
774{
775 seq_printf(m, "%d\n", cifsFYI);
776 return 0;
777}
778
779static int cifsFYI_proc_open(struct inode *inode, struct file *file)
780{
781 return single_open(file, cifsFYI_proc_show, NULL);
782}
783
784static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
785 size_t count, loff_t *ppos)
786{
787 char c[2] = { '\0' };
788 bool bv;
789 int rc;
790
791 rc = get_user(c[0], buffer);
792 if (rc)
793 return rc;
794 if (strtobool(c, &bv) == 0)
795 cifsFYI = bv;
796 else if ((c[0] > '1') && (c[0] <= '9'))
797 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
798 else
799 return -EINVAL;
800
801 return count;
802}
803
804static const struct proc_ops cifsFYI_proc_ops = {
805 .proc_open = cifsFYI_proc_open,
806 .proc_read = seq_read,
807 .proc_lseek = seq_lseek,
808 .proc_release = single_release,
809 .proc_write = cifsFYI_proc_write,
810};
811
812static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
813{
814 seq_printf(m, "%d\n", linuxExtEnabled);
815 return 0;
816}
817
818static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
819{
820 return single_open(file, cifs_linux_ext_proc_show, NULL);
821}
822
823static ssize_t cifs_linux_ext_proc_write(struct file *file,
824 const char __user *buffer, size_t count, loff_t *ppos)
825{
826 int rc;
827
828 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
829 if (rc)
830 return rc;
831
832 return count;
833}
834
835static const struct proc_ops cifs_linux_ext_proc_ops = {
836 .proc_open = cifs_linux_ext_proc_open,
837 .proc_read = seq_read,
838 .proc_lseek = seq_lseek,
839 .proc_release = single_release,
840 .proc_write = cifs_linux_ext_proc_write,
841};
842
843static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
844{
845 seq_printf(m, "%d\n", lookupCacheEnabled);
846 return 0;
847}
848
849static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
850{
851 return single_open(file, cifs_lookup_cache_proc_show, NULL);
852}
853
854static ssize_t cifs_lookup_cache_proc_write(struct file *file,
855 const char __user *buffer, size_t count, loff_t *ppos)
856{
857 int rc;
858
859 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
860 if (rc)
861 return rc;
862
863 return count;
864}
865
866static const struct proc_ops cifs_lookup_cache_proc_ops = {
867 .proc_open = cifs_lookup_cache_proc_open,
868 .proc_read = seq_read,
869 .proc_lseek = seq_lseek,
870 .proc_release = single_release,
871 .proc_write = cifs_lookup_cache_proc_write,
872};
873
874static int traceSMB_proc_show(struct seq_file *m, void *v)
875{
876 seq_printf(m, "%d\n", traceSMB);
877 return 0;
878}
879
880static int traceSMB_proc_open(struct inode *inode, struct file *file)
881{
882 return single_open(file, traceSMB_proc_show, NULL);
883}
884
885static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
886 size_t count, loff_t *ppos)
887{
888 int rc;
889
890 rc = kstrtobool_from_user(buffer, count, &traceSMB);
891 if (rc)
892 return rc;
893
894 return count;
895}
896
897static const struct proc_ops traceSMB_proc_ops = {
898 .proc_open = traceSMB_proc_open,
899 .proc_read = seq_read,
900 .proc_lseek = seq_lseek,
901 .proc_release = single_release,
902 .proc_write = traceSMB_proc_write,
903};
904
905static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
906{
907 seq_printf(m, "0x%x\n", global_secflags);
908 return 0;
909}
910
911static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
912{
913 return single_open(file, cifs_security_flags_proc_show, NULL);
914}
915
916/*
917 * Ensure that if someone sets a MUST flag, that we disable all other MAY
918 * flags except for the ones corresponding to the given MUST flag. If there are
919 * multiple MUST flags, then try to prefer more secure ones.
920 */
921static void
922cifs_security_flags_handle_must_flags(unsigned int *flags)
923{
924 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
925
926 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
927 *flags = CIFSSEC_MUST_KRB5;
928 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
929 *flags = CIFSSEC_MUST_NTLMSSP;
930 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
931 *flags = CIFSSEC_MUST_NTLMV2;
932 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
933 *flags = CIFSSEC_MUST_NTLM;
934 else if (CIFSSEC_MUST_LANMAN &&
935 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
936 *flags = CIFSSEC_MUST_LANMAN;
937 else if (CIFSSEC_MUST_PLNTXT &&
938 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
939 *flags = CIFSSEC_MUST_PLNTXT;
940
941 *flags |= signflags;
942}
943
944static ssize_t cifs_security_flags_proc_write(struct file *file,
945 const char __user *buffer, size_t count, loff_t *ppos)
946{
947 int rc;
948 unsigned int flags;
949 char flags_string[12];
950 bool bv;
951
952 if ((count < 1) || (count > 11))
953 return -EINVAL;
954
955 memset(flags_string, 0, 12);
956
957 if (copy_from_user(flags_string, buffer, count))
958 return -EFAULT;
959
960 if (count < 3) {
961 /* single char or single char followed by null */
962 if (strtobool(flags_string, &bv) == 0) {
963 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
964 return count;
965 } else if (!isdigit(flags_string[0])) {
966 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
967 flags_string);
968 return -EINVAL;
969 }
970 }
971
972 /* else we have a number */
973 rc = kstrtouint(flags_string, 0, &flags);
974 if (rc) {
975 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
976 flags_string);
977 return rc;
978 }
979
980 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
981
982 if (flags == 0) {
983 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
984 return -EINVAL;
985 }
986
987 if (flags & ~CIFSSEC_MASK) {
988 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
989 flags & ~CIFSSEC_MASK);
990 return -EINVAL;
991 }
992
993 cifs_security_flags_handle_must_flags(&flags);
994
995 /* flags look ok - update the global security flags for cifs module */
996 global_secflags = flags;
997 if (global_secflags & CIFSSEC_MUST_SIGN) {
998 /* requiring signing implies signing is allowed */
999 global_secflags |= CIFSSEC_MAY_SIGN;
1000 cifs_dbg(FYI, "packet signing now required\n");
1001 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1002 cifs_dbg(FYI, "packet signing disabled\n");
1003 }
1004 /* BB should we turn on MAY flags for other MUST options? */
1005 return count;
1006}
1007
1008static const struct proc_ops cifs_security_flags_proc_ops = {
1009 .proc_open = cifs_security_flags_proc_open,
1010 .proc_read = seq_read,
1011 .proc_lseek = seq_lseek,
1012 .proc_release = single_release,
1013 .proc_write = cifs_security_flags_proc_write,
1014};
1015
1016/* To make it easier to debug, can help to show mount params */
1017static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1018{
1019 const struct fs_parameter_spec *p;
1020 const char *type;
1021
1022 for (p = smb3_fs_parameters; p->name; p++) {
1023 /* cannot use switch with pointers... */
1024 if (!p->type) {
1025 if (p->flags == fs_param_neg_with_no)
1026 type = "noflag";
1027 else
1028 type = "flag";
1029 } else if (p->type == fs_param_is_bool)
1030 type = "bool";
1031 else if (p->type == fs_param_is_u32)
1032 type = "u32";
1033 else if (p->type == fs_param_is_u64)
1034 type = "u64";
1035 else if (p->type == fs_param_is_string)
1036 type = "string";
1037 else
1038 type = "unknown";
1039
1040 seq_printf(m, "%s:%s\n", p->name, type);
1041 }
1042
1043 return 0;
1044}
1045
1046static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1047{
1048 return single_open(file, cifs_mount_params_proc_show, NULL);
1049}
1050
1051static const struct proc_ops cifs_mount_params_proc_ops = {
1052 .proc_open = cifs_mount_params_proc_open,
1053 .proc_read = seq_read,
1054 .proc_lseek = seq_lseek,
1055 .proc_release = single_release,
1056 /* No need for write for now */
1057 /* .proc_write = cifs_mount_params_proc_write, */
1058};
1059
1060#else
1061inline void cifs_proc_init(void)
1062{
1063}
1064
1065inline void cifs_proc_clean(void)
1066{
1067}
1068#endif /* PROC_FS */