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