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