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[people/ms/linux.git] / fs / cifs / cifs_debug.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *
4 * Copyright (C) International Business Machines Corp., 2000,2005
5 *
6 * Modified by Steve French (sfrench@us.ibm.com)
7 */
8 #include <linux/fs.h>
9 #include <linux/string.h>
10 #include <linux/ctype.h>
11 #include <linux/module.h>
12 #include <linux/proc_fs.h>
13 #include <linux/uaccess.h>
14 #include "cifspdu.h"
15 #include "cifsglob.h"
16 #include "cifsproto.h"
17 #include "cifs_debug.h"
18 #include "cifsfs.h"
19 #include "fs_context.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 #include "cifs_swn.h"
27
28 void
29 cifs_dump_mem(char *label, void *data, int length)
30 {
31 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
32 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
33 data, length, true);
34 }
35
36 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
37 {
38 #ifdef CONFIG_CIFS_DEBUG2
39 struct smb_hdr *smb = (struct smb_hdr *)buf;
40
41 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
42 smb->Command, smb->Status.CifsError,
43 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
44 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
45 server->ops->calc_smb_size(smb, server));
46 #endif /* CONFIG_CIFS_DEBUG2 */
47 }
48
49 void cifs_dump_mids(struct TCP_Server_Info *server)
50 {
51 #ifdef CONFIG_CIFS_DEBUG2
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_entry(mid_entry, &server->pending_mid_q, qhead) {
60 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
61 mid_entry->mid_state,
62 le16_to_cpu(mid_entry->command),
63 mid_entry->pid,
64 mid_entry->callback_data,
65 mid_entry->mid);
66 #ifdef CONFIG_CIFS_STATS2
67 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
68 mid_entry->large_buf,
69 mid_entry->resp_buf,
70 mid_entry->when_received,
71 jiffies);
72 #endif /* STATS2 */
73 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
74 mid_entry->multiRsp, mid_entry->multiEnd);
75 if (mid_entry->resp_buf) {
76 cifs_dump_detail(mid_entry->resp_buf, server);
77 cifs_dump_mem("existing buf: ",
78 mid_entry->resp_buf, 62);
79 }
80 }
81 spin_unlock(&GlobalMid_Lock);
82 #endif /* CONFIG_CIFS_DEBUG2 */
83 }
84
85 #ifdef CONFIG_PROC_FS
86 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
87 {
88 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
89
90 seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
91 if (tcon->nativeFileSystem)
92 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
93 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
94 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
95 le32_to_cpu(tcon->fsAttrInfo.Attributes),
96 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
97 tcon->status);
98 if (dev_type == FILE_DEVICE_DISK)
99 seq_puts(m, " type: DISK ");
100 else if (dev_type == FILE_DEVICE_CD_ROM)
101 seq_puts(m, " type: CDROM ");
102 else
103 seq_printf(m, " type: %d ", dev_type);
104
105 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
106
107 if ((tcon->seal) ||
108 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
109 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
110 seq_printf(m, " Encrypted");
111 if (tcon->nocase)
112 seq_printf(m, " nocase");
113 if (tcon->unix_ext)
114 seq_printf(m, " POSIX Extensions");
115 if (tcon->ses->server->ops->dump_share_caps)
116 tcon->ses->server->ops->dump_share_caps(m, tcon);
117 if (tcon->use_witness)
118 seq_puts(m, " Witness");
119 if (tcon->broken_sparse_sup)
120 seq_puts(m, " nosparse");
121 if (tcon->need_reconnect)
122 seq_puts(m, "\tDISCONNECTED ");
123 seq_putc(m, '\n');
124 }
125
126 static void
127 cifs_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
148 static void
149 cifs_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 if (!iface->is_active)
166 seq_puts(m, "\t\t[for-cleanup]\n");
167 }
168
169 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
170 {
171 struct list_head *tmp, *tmp1, *tmp2;
172 struct TCP_Server_Info *server;
173 struct cifs_ses *ses;
174 struct cifs_tcon *tcon;
175 struct cifsFileInfo *cfile;
176
177 seq_puts(m, "# Version:1\n");
178 seq_puts(m, "# Format:\n");
179 seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
180 #ifdef CONFIG_CIFS_DEBUG2
181 seq_printf(m, " <filename> <mid>\n");
182 #else
183 seq_printf(m, " <filename>\n");
184 #endif /* CIFS_DEBUG2 */
185 spin_lock(&cifs_tcp_ses_lock);
186 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
187 list_for_each(tmp, &server->smb_ses_list) {
188 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
189 list_for_each(tmp1, &ses->tcon_list) {
190 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
191 spin_lock(&tcon->open_file_lock);
192 list_for_each(tmp2, &tcon->openFileList) {
193 cfile = list_entry(tmp2, struct cifsFileInfo,
194 tlist);
195 seq_printf(m,
196 "0x%x 0x%llx 0x%x %d %d %d %pd",
197 tcon->tid,
198 cfile->fid.persistent_fid,
199 cfile->f_flags,
200 cfile->count,
201 cfile->pid,
202 from_kuid(&init_user_ns, cfile->uid),
203 cfile->dentry);
204 #ifdef CONFIG_CIFS_DEBUG2
205 seq_printf(m, " %llu\n", cfile->fid.mid);
206 #else
207 seq_printf(m, "\n");
208 #endif /* CIFS_DEBUG2 */
209 }
210 spin_unlock(&tcon->open_file_lock);
211 }
212 }
213 }
214 spin_unlock(&cifs_tcp_ses_lock);
215 seq_putc(m, '\n');
216 return 0;
217 }
218
219 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
220 {
221 struct list_head *tmp2, *tmp3;
222 struct mid_q_entry *mid_entry;
223 struct TCP_Server_Info *server;
224 struct cifs_ses *ses;
225 struct cifs_tcon *tcon;
226 struct cifs_server_iface *iface;
227 int c, i, j;
228
229 seq_puts(m,
230 "Display Internal CIFS Data Structures for Debugging\n"
231 "---------------------------------------------------\n");
232 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
233 seq_printf(m, "Features:");
234 #ifdef CONFIG_CIFS_DFS_UPCALL
235 seq_printf(m, " DFS");
236 #endif
237 #ifdef CONFIG_CIFS_FSCACHE
238 seq_printf(m, ",FSCACHE");
239 #endif
240 #ifdef CONFIG_CIFS_SMB_DIRECT
241 seq_printf(m, ",SMB_DIRECT");
242 #endif
243 #ifdef CONFIG_CIFS_STATS2
244 seq_printf(m, ",STATS2");
245 #else
246 seq_printf(m, ",STATS");
247 #endif
248 #ifdef CONFIG_CIFS_DEBUG2
249 seq_printf(m, ",DEBUG2");
250 #elif defined(CONFIG_CIFS_DEBUG)
251 seq_printf(m, ",DEBUG");
252 #endif
253 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
254 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
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 /* channel info will be printed as a part of sessions below */
279 if (CIFS_SERVER_IS_CHAN(server))
280 continue;
281
282 c++;
283 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
284 c, server->conn_id);
285
286 if (server->hostname)
287 seq_printf(m, "Hostname: %s ", server->hostname);
288 #ifdef CONFIG_CIFS_SMB_DIRECT
289 if (!server->rdma)
290 goto skip_rdma;
291
292 if (!server->smbd_conn) {
293 seq_printf(m, "\nSMBDirect transport not available");
294 goto skip_rdma;
295 }
296
297 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
298 "transport status: %x",
299 server->smbd_conn->protocol,
300 server->smbd_conn->transport_status);
301 seq_printf(m, "\nConn receive_credit_max: %x "
302 "send_credit_target: %x max_send_size: %x",
303 server->smbd_conn->receive_credit_max,
304 server->smbd_conn->send_credit_target,
305 server->smbd_conn->max_send_size);
306 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
307 "max_fragmented_send_size: %x max_receive_size:%x",
308 server->smbd_conn->max_fragmented_recv_size,
309 server->smbd_conn->max_fragmented_send_size,
310 server->smbd_conn->max_receive_size);
311 seq_printf(m, "\nConn keep_alive_interval: %x "
312 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
313 server->smbd_conn->keep_alive_interval,
314 server->smbd_conn->max_readwrite_size,
315 server->smbd_conn->rdma_readwrite_threshold);
316 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
317 "count_put_receive_buffer: %x count_send_empty: %x",
318 server->smbd_conn->count_get_receive_buffer,
319 server->smbd_conn->count_put_receive_buffer,
320 server->smbd_conn->count_send_empty);
321 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
322 "count_enqueue_reassembly_queue: %x "
323 "count_dequeue_reassembly_queue: %x "
324 "fragment_reassembly_remaining: %x "
325 "reassembly_data_length: %x "
326 "reassembly_queue_length: %x",
327 server->smbd_conn->count_reassembly_queue,
328 server->smbd_conn->count_enqueue_reassembly_queue,
329 server->smbd_conn->count_dequeue_reassembly_queue,
330 server->smbd_conn->fragment_reassembly_remaining,
331 server->smbd_conn->reassembly_data_length,
332 server->smbd_conn->reassembly_queue_length);
333 seq_printf(m, "\nCurrent Credits send_credits: %x "
334 "receive_credits: %x receive_credit_target: %x",
335 atomic_read(&server->smbd_conn->send_credits),
336 atomic_read(&server->smbd_conn->receive_credits),
337 server->smbd_conn->receive_credit_target);
338 seq_printf(m, "\nPending send_pending: %x ",
339 atomic_read(&server->smbd_conn->send_pending));
340 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
341 "count_empty_packet_queue: %x",
342 server->smbd_conn->count_receive_queue,
343 server->smbd_conn->count_empty_packet_queue);
344 seq_printf(m, "\nMR responder_resources: %x "
345 "max_frmr_depth: %x mr_type: %x",
346 server->smbd_conn->responder_resources,
347 server->smbd_conn->max_frmr_depth,
348 server->smbd_conn->mr_type);
349 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
350 atomic_read(&server->smbd_conn->mr_ready_count),
351 atomic_read(&server->smbd_conn->mr_used_count));
352 skip_rdma:
353 #endif
354 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
355 server->credits, server->dialect);
356 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
357 seq_printf(m, " COMPRESS_LZNT1");
358 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
359 seq_printf(m, " COMPRESS_LZ77");
360 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
361 seq_printf(m, " COMPRESS_LZ77_HUFF");
362 if (server->sign)
363 seq_printf(m, " signed");
364 if (server->posix_ext_supported)
365 seq_printf(m, " posix");
366 if (server->nosharesock)
367 seq_printf(m, " nosharesock");
368
369 if (server->rdma)
370 seq_printf(m, "\nRDMA ");
371 seq_printf(m, "\nTCP status: %d Instance: %d"
372 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
373 server->tcpStatus,
374 server->reconnect_instance,
375 server->srv_count,
376 server->sec_mode, in_flight(server));
377
378 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
379 atomic_read(&server->in_send),
380 atomic_read(&server->num_waiters));
381
382 seq_printf(m, "\n\n\tSessions: ");
383 i = 0;
384 list_for_each(tmp2, &server->smb_ses_list) {
385 ses = list_entry(tmp2, struct cifs_ses,
386 smb_ses_list);
387 i++;
388 if ((ses->serverDomain == NULL) ||
389 (ses->serverOS == NULL) ||
390 (ses->serverNOS == NULL)) {
391 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
392 i, ses->ip_addr, ses->ses_count,
393 ses->capabilities, ses->ses_status);
394 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
395 seq_printf(m, "Guest ");
396 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
397 seq_printf(m, "Anonymous ");
398 } else {
399 seq_printf(m,
400 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
401 "\n\tNOS: %s\tCapability: 0x%x"
402 "\n\tSMB session status: %d ",
403 i, ses->ip_addr, ses->serverDomain,
404 ses->ses_count, ses->serverOS, ses->serverNOS,
405 ses->capabilities, ses->ses_status);
406 }
407
408 seq_printf(m, "\n\tSecurity type: %s ",
409 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
410
411 /* dump session id helpful for use with network trace */
412 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
413 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
414 seq_puts(m, " encrypted");
415 if (ses->sign)
416 seq_puts(m, " signed");
417
418 seq_printf(m, "\n\tUser: %d Cred User: %d",
419 from_kuid(&init_user_ns, ses->linux_uid),
420 from_kuid(&init_user_ns, ses->cred_uid));
421
422 spin_lock(&ses->chan_lock);
423 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
424 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
425 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
426 seq_puts(m, "\t[RECONNECTING] ");
427
428 if (ses->chan_count > 1) {
429 seq_printf(m, "\n\n\tExtra Channels: %zu ",
430 ses->chan_count-1);
431 for (j = 1; j < ses->chan_count; j++) {
432 cifs_dump_channel(m, j, &ses->chans[j]);
433 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
434 seq_puts(m, "\tDISCONNECTED ");
435 if (CIFS_CHAN_IN_RECONNECT(ses, j))
436 seq_puts(m, "\t[RECONNECTING] ");
437 }
438 }
439 spin_unlock(&ses->chan_lock);
440
441 seq_puts(m, "\n\n\tShares: ");
442 j = 0;
443
444 seq_printf(m, "\n\t%d) IPC: ", j);
445 if (ses->tcon_ipc)
446 cifs_debug_tcon(m, ses->tcon_ipc);
447 else
448 seq_puts(m, "none\n");
449
450 list_for_each(tmp3, &ses->tcon_list) {
451 tcon = list_entry(tmp3, struct cifs_tcon,
452 tcon_list);
453 ++j;
454 seq_printf(m, "\n\t%d) ", j);
455 cifs_debug_tcon(m, tcon);
456 }
457
458 spin_lock(&ses->iface_lock);
459 if (ses->iface_count)
460 seq_printf(m, "\n\n\tServer interfaces: %zu",
461 ses->iface_count);
462 j = 0;
463 list_for_each_entry(iface, &ses->iface_list,
464 iface_head) {
465 seq_printf(m, "\n\t%d)", ++j);
466 cifs_dump_iface(m, iface);
467 if (is_ses_using_iface(ses, iface))
468 seq_puts(m, "\t\t[CONNECTED]\n");
469 }
470 spin_unlock(&ses->iface_lock);
471 }
472 if (i == 0)
473 seq_printf(m, "\n\t\t[NONE]");
474
475 seq_puts(m, "\n\n\tMIDs: ");
476 spin_lock(&GlobalMid_Lock);
477 list_for_each(tmp3, &server->pending_mid_q) {
478 mid_entry = list_entry(tmp3, struct mid_q_entry,
479 qhead);
480 seq_printf(m, "\n\tState: %d com: %d pid:"
481 " %d cbdata: %p mid %llu\n",
482 mid_entry->mid_state,
483 le16_to_cpu(mid_entry->command),
484 mid_entry->pid,
485 mid_entry->callback_data,
486 mid_entry->mid);
487 }
488 spin_unlock(&GlobalMid_Lock);
489 seq_printf(m, "\n--\n");
490 }
491 if (c == 0)
492 seq_printf(m, "\n\t[NONE]");
493
494 spin_unlock(&cifs_tcp_ses_lock);
495 seq_putc(m, '\n');
496 cifs_swn_dump(m);
497
498 /* BB add code to dump additional info such as TCP session info now */
499 return 0;
500 }
501
502 static ssize_t cifs_stats_proc_write(struct file *file,
503 const char __user *buffer, size_t count, loff_t *ppos)
504 {
505 bool bv;
506 int rc;
507 struct list_head *tmp1, *tmp2, *tmp3;
508 struct TCP_Server_Info *server;
509 struct cifs_ses *ses;
510 struct cifs_tcon *tcon;
511
512 rc = kstrtobool_from_user(buffer, count, &bv);
513 if (rc == 0) {
514 #ifdef CONFIG_CIFS_STATS2
515 int i;
516
517 atomic_set(&totBufAllocCount, 0);
518 atomic_set(&totSmBufAllocCount, 0);
519 #endif /* CONFIG_CIFS_STATS2 */
520 atomic_set(&tcpSesReconnectCount, 0);
521 atomic_set(&tconInfoReconnectCount, 0);
522
523 spin_lock(&GlobalMid_Lock);
524 GlobalMaxActiveXid = 0;
525 GlobalCurrentXid = 0;
526 spin_unlock(&GlobalMid_Lock);
527 spin_lock(&cifs_tcp_ses_lock);
528 list_for_each(tmp1, &cifs_tcp_ses_list) {
529 server = list_entry(tmp1, struct TCP_Server_Info,
530 tcp_ses_list);
531 server->max_in_flight = 0;
532 #ifdef CONFIG_CIFS_STATS2
533 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
534 atomic_set(&server->num_cmds[i], 0);
535 atomic_set(&server->smb2slowcmd[i], 0);
536 server->time_per_cmd[i] = 0;
537 server->slowest_cmd[i] = 0;
538 server->fastest_cmd[0] = 0;
539 }
540 #endif /* CONFIG_CIFS_STATS2 */
541 list_for_each(tmp2, &server->smb_ses_list) {
542 ses = list_entry(tmp2, struct cifs_ses,
543 smb_ses_list);
544 list_for_each(tmp3, &ses->tcon_list) {
545 tcon = list_entry(tmp3,
546 struct cifs_tcon,
547 tcon_list);
548 atomic_set(&tcon->num_smbs_sent, 0);
549 spin_lock(&tcon->stat_lock);
550 tcon->bytes_read = 0;
551 tcon->bytes_written = 0;
552 spin_unlock(&tcon->stat_lock);
553 if (server->ops->clear_stats)
554 server->ops->clear_stats(tcon);
555 }
556 }
557 }
558 spin_unlock(&cifs_tcp_ses_lock);
559 } else {
560 return rc;
561 }
562
563 return count;
564 }
565
566 static int cifs_stats_proc_show(struct seq_file *m, void *v)
567 {
568 int i;
569 #ifdef CONFIG_CIFS_STATS2
570 int j;
571 #endif /* STATS2 */
572 struct list_head *tmp2, *tmp3;
573 struct TCP_Server_Info *server;
574 struct cifs_ses *ses;
575 struct cifs_tcon *tcon;
576
577 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
578 sesInfoAllocCount.counter);
579 seq_printf(m, "Share (unique mount targets): %d\n",
580 tconInfoAllocCount.counter);
581 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
582 bufAllocCount.counter,
583 cifs_min_rcv + tcpSesAllocCount.counter);
584 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
585 smBufAllocCount.counter, cifs_min_small);
586 #ifdef CONFIG_CIFS_STATS2
587 seq_printf(m, "Total Large %d Small %d Allocations\n",
588 atomic_read(&totBufAllocCount),
589 atomic_read(&totSmBufAllocCount));
590 #endif /* CONFIG_CIFS_STATS2 */
591
592 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
593 seq_printf(m,
594 "\n%d session %d share reconnects\n",
595 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
596
597 seq_printf(m,
598 "Total vfs operations: %d maximum at one time: %d\n",
599 GlobalCurrentXid, GlobalMaxActiveXid);
600
601 i = 0;
602 spin_lock(&cifs_tcp_ses_lock);
603 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
604 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
605 #ifdef CONFIG_CIFS_STATS2
606 seq_puts(m, "\nTotal time spent processing by command. Time ");
607 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
608 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
609 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
610 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
611 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
612 atomic_read(&server->num_cmds[j]),
613 server->time_per_cmd[j],
614 server->fastest_cmd[j],
615 server->slowest_cmd[j]);
616 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
617 if (atomic_read(&server->smb2slowcmd[j]))
618 seq_printf(m, " %d slow responses from %s for command %d\n",
619 atomic_read(&server->smb2slowcmd[j]),
620 server->hostname, j);
621 #endif /* STATS2 */
622 list_for_each(tmp2, &server->smb_ses_list) {
623 ses = list_entry(tmp2, struct cifs_ses,
624 smb_ses_list);
625 list_for_each(tmp3, &ses->tcon_list) {
626 tcon = list_entry(tmp3,
627 struct cifs_tcon,
628 tcon_list);
629 i++;
630 seq_printf(m, "\n%d) %s", i, tcon->treeName);
631 if (tcon->need_reconnect)
632 seq_puts(m, "\tDISCONNECTED ");
633 seq_printf(m, "\nSMBs: %d",
634 atomic_read(&tcon->num_smbs_sent));
635 if (server->ops->print_stats)
636 server->ops->print_stats(m, tcon);
637 }
638 }
639 }
640 spin_unlock(&cifs_tcp_ses_lock);
641
642 seq_putc(m, '\n');
643 return 0;
644 }
645
646 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
647 {
648 return single_open(file, cifs_stats_proc_show, NULL);
649 }
650
651 static const struct proc_ops cifs_stats_proc_ops = {
652 .proc_open = cifs_stats_proc_open,
653 .proc_read = seq_read,
654 .proc_lseek = seq_lseek,
655 .proc_release = single_release,
656 .proc_write = cifs_stats_proc_write,
657 };
658
659 #ifdef CONFIG_CIFS_SMB_DIRECT
660 #define PROC_FILE_DEFINE(name) \
661 static ssize_t name##_write(struct file *file, const char __user *buffer, \
662 size_t count, loff_t *ppos) \
663 { \
664 int rc; \
665 rc = kstrtoint_from_user(buffer, count, 10, & name); \
666 if (rc) \
667 return rc; \
668 return count; \
669 } \
670 static int name##_proc_show(struct seq_file *m, void *v) \
671 { \
672 seq_printf(m, "%d\n", name ); \
673 return 0; \
674 } \
675 static int name##_open(struct inode *inode, struct file *file) \
676 { \
677 return single_open(file, name##_proc_show, NULL); \
678 } \
679 \
680 static const struct proc_ops cifs_##name##_proc_fops = { \
681 .proc_open = name##_open, \
682 .proc_read = seq_read, \
683 .proc_lseek = seq_lseek, \
684 .proc_release = single_release, \
685 .proc_write = name##_write, \
686 }
687
688 PROC_FILE_DEFINE(rdma_readwrite_threshold);
689 PROC_FILE_DEFINE(smbd_max_frmr_depth);
690 PROC_FILE_DEFINE(smbd_keep_alive_interval);
691 PROC_FILE_DEFINE(smbd_max_receive_size);
692 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
693 PROC_FILE_DEFINE(smbd_max_send_size);
694 PROC_FILE_DEFINE(smbd_send_credit_target);
695 PROC_FILE_DEFINE(smbd_receive_credit_max);
696 #endif
697
698 static struct proc_dir_entry *proc_fs_cifs;
699 static const struct proc_ops cifsFYI_proc_ops;
700 static const struct proc_ops cifs_lookup_cache_proc_ops;
701 static const struct proc_ops traceSMB_proc_ops;
702 static const struct proc_ops cifs_security_flags_proc_ops;
703 static const struct proc_ops cifs_linux_ext_proc_ops;
704 static const struct proc_ops cifs_mount_params_proc_ops;
705
706 void
707 cifs_proc_init(void)
708 {
709 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
710 if (proc_fs_cifs == NULL)
711 return;
712
713 proc_create_single("DebugData", 0, proc_fs_cifs,
714 cifs_debug_data_proc_show);
715
716 proc_create_single("open_files", 0400, proc_fs_cifs,
717 cifs_debug_files_proc_show);
718
719 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
720 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
721 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
722 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
723 &cifs_linux_ext_proc_ops);
724 proc_create("SecurityFlags", 0644, proc_fs_cifs,
725 &cifs_security_flags_proc_ops);
726 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
727 &cifs_lookup_cache_proc_ops);
728
729 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
730
731 #ifdef CONFIG_CIFS_DFS_UPCALL
732 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
733 #endif
734
735 #ifdef CONFIG_CIFS_SMB_DIRECT
736 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
737 &cifs_rdma_readwrite_threshold_proc_fops);
738 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
739 &cifs_smbd_max_frmr_depth_proc_fops);
740 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
741 &cifs_smbd_keep_alive_interval_proc_fops);
742 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
743 &cifs_smbd_max_receive_size_proc_fops);
744 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
745 &cifs_smbd_max_fragmented_recv_size_proc_fops);
746 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
747 &cifs_smbd_max_send_size_proc_fops);
748 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
749 &cifs_smbd_send_credit_target_proc_fops);
750 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
751 &cifs_smbd_receive_credit_max_proc_fops);
752 #endif
753 }
754
755 void
756 cifs_proc_clean(void)
757 {
758 if (proc_fs_cifs == NULL)
759 return;
760
761 remove_proc_entry("DebugData", proc_fs_cifs);
762 remove_proc_entry("open_files", proc_fs_cifs);
763 remove_proc_entry("cifsFYI", proc_fs_cifs);
764 remove_proc_entry("traceSMB", proc_fs_cifs);
765 remove_proc_entry("Stats", proc_fs_cifs);
766 remove_proc_entry("SecurityFlags", proc_fs_cifs);
767 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
768 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
769 remove_proc_entry("mount_params", proc_fs_cifs);
770
771 #ifdef CONFIG_CIFS_DFS_UPCALL
772 remove_proc_entry("dfscache", proc_fs_cifs);
773 #endif
774 #ifdef CONFIG_CIFS_SMB_DIRECT
775 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
776 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
777 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
778 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
779 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
780 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
781 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
782 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
783 #endif
784 remove_proc_entry("fs/cifs", NULL);
785 }
786
787 static int cifsFYI_proc_show(struct seq_file *m, void *v)
788 {
789 seq_printf(m, "%d\n", cifsFYI);
790 return 0;
791 }
792
793 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
794 {
795 return single_open(file, cifsFYI_proc_show, NULL);
796 }
797
798 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
799 size_t count, loff_t *ppos)
800 {
801 char c[2] = { '\0' };
802 bool bv;
803 int rc;
804
805 rc = get_user(c[0], buffer);
806 if (rc)
807 return rc;
808 if (strtobool(c, &bv) == 0)
809 cifsFYI = bv;
810 else if ((c[0] > '1') && (c[0] <= '9'))
811 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
812 else
813 return -EINVAL;
814
815 return count;
816 }
817
818 static const struct proc_ops cifsFYI_proc_ops = {
819 .proc_open = cifsFYI_proc_open,
820 .proc_read = seq_read,
821 .proc_lseek = seq_lseek,
822 .proc_release = single_release,
823 .proc_write = cifsFYI_proc_write,
824 };
825
826 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
827 {
828 seq_printf(m, "%d\n", linuxExtEnabled);
829 return 0;
830 }
831
832 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
833 {
834 return single_open(file, cifs_linux_ext_proc_show, NULL);
835 }
836
837 static ssize_t cifs_linux_ext_proc_write(struct file *file,
838 const char __user *buffer, size_t count, loff_t *ppos)
839 {
840 int rc;
841
842 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
843 if (rc)
844 return rc;
845
846 return count;
847 }
848
849 static const struct proc_ops cifs_linux_ext_proc_ops = {
850 .proc_open = cifs_linux_ext_proc_open,
851 .proc_read = seq_read,
852 .proc_lseek = seq_lseek,
853 .proc_release = single_release,
854 .proc_write = cifs_linux_ext_proc_write,
855 };
856
857 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
858 {
859 seq_printf(m, "%d\n", lookupCacheEnabled);
860 return 0;
861 }
862
863 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
864 {
865 return single_open(file, cifs_lookup_cache_proc_show, NULL);
866 }
867
868 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
869 const char __user *buffer, size_t count, loff_t *ppos)
870 {
871 int rc;
872
873 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
874 if (rc)
875 return rc;
876
877 return count;
878 }
879
880 static const struct proc_ops cifs_lookup_cache_proc_ops = {
881 .proc_open = cifs_lookup_cache_proc_open,
882 .proc_read = seq_read,
883 .proc_lseek = seq_lseek,
884 .proc_release = single_release,
885 .proc_write = cifs_lookup_cache_proc_write,
886 };
887
888 static int traceSMB_proc_show(struct seq_file *m, void *v)
889 {
890 seq_printf(m, "%d\n", traceSMB);
891 return 0;
892 }
893
894 static int traceSMB_proc_open(struct inode *inode, struct file *file)
895 {
896 return single_open(file, traceSMB_proc_show, NULL);
897 }
898
899 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
900 size_t count, loff_t *ppos)
901 {
902 int rc;
903
904 rc = kstrtobool_from_user(buffer, count, &traceSMB);
905 if (rc)
906 return rc;
907
908 return count;
909 }
910
911 static const struct proc_ops traceSMB_proc_ops = {
912 .proc_open = traceSMB_proc_open,
913 .proc_read = seq_read,
914 .proc_lseek = seq_lseek,
915 .proc_release = single_release,
916 .proc_write = traceSMB_proc_write,
917 };
918
919 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
920 {
921 seq_printf(m, "0x%x\n", global_secflags);
922 return 0;
923 }
924
925 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
926 {
927 return single_open(file, cifs_security_flags_proc_show, NULL);
928 }
929
930 /*
931 * Ensure that if someone sets a MUST flag, that we disable all other MAY
932 * flags except for the ones corresponding to the given MUST flag. If there are
933 * multiple MUST flags, then try to prefer more secure ones.
934 */
935 static void
936 cifs_security_flags_handle_must_flags(unsigned int *flags)
937 {
938 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
939
940 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
941 *flags = CIFSSEC_MUST_KRB5;
942 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
943 *flags = CIFSSEC_MUST_NTLMSSP;
944 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
945 *flags = CIFSSEC_MUST_NTLMV2;
946
947 *flags |= signflags;
948 }
949
950 static ssize_t cifs_security_flags_proc_write(struct file *file,
951 const char __user *buffer, size_t count, loff_t *ppos)
952 {
953 int rc;
954 unsigned int flags;
955 char flags_string[12];
956 bool bv;
957
958 if ((count < 1) || (count > 11))
959 return -EINVAL;
960
961 memset(flags_string, 0, 12);
962
963 if (copy_from_user(flags_string, buffer, count))
964 return -EFAULT;
965
966 if (count < 3) {
967 /* single char or single char followed by null */
968 if (strtobool(flags_string, &bv) == 0) {
969 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
970 return count;
971 } else if (!isdigit(flags_string[0])) {
972 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
973 flags_string);
974 return -EINVAL;
975 }
976 }
977
978 /* else we have a number */
979 rc = kstrtouint(flags_string, 0, &flags);
980 if (rc) {
981 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
982 flags_string);
983 return rc;
984 }
985
986 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
987
988 if (flags == 0) {
989 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
990 return -EINVAL;
991 }
992
993 if (flags & ~CIFSSEC_MASK) {
994 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
995 flags & ~CIFSSEC_MASK);
996 return -EINVAL;
997 }
998
999 cifs_security_flags_handle_must_flags(&flags);
1000
1001 /* flags look ok - update the global security flags for cifs module */
1002 global_secflags = flags;
1003 if (global_secflags & CIFSSEC_MUST_SIGN) {
1004 /* requiring signing implies signing is allowed */
1005 global_secflags |= CIFSSEC_MAY_SIGN;
1006 cifs_dbg(FYI, "packet signing now required\n");
1007 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1008 cifs_dbg(FYI, "packet signing disabled\n");
1009 }
1010 /* BB should we turn on MAY flags for other MUST options? */
1011 return count;
1012 }
1013
1014 static const struct proc_ops cifs_security_flags_proc_ops = {
1015 .proc_open = cifs_security_flags_proc_open,
1016 .proc_read = seq_read,
1017 .proc_lseek = seq_lseek,
1018 .proc_release = single_release,
1019 .proc_write = cifs_security_flags_proc_write,
1020 };
1021
1022 /* To make it easier to debug, can help to show mount params */
1023 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1024 {
1025 const struct fs_parameter_spec *p;
1026 const char *type;
1027
1028 for (p = smb3_fs_parameters; p->name; p++) {
1029 /* cannot use switch with pointers... */
1030 if (!p->type) {
1031 if (p->flags == fs_param_neg_with_no)
1032 type = "noflag";
1033 else
1034 type = "flag";
1035 } else if (p->type == fs_param_is_bool)
1036 type = "bool";
1037 else if (p->type == fs_param_is_u32)
1038 type = "u32";
1039 else if (p->type == fs_param_is_u64)
1040 type = "u64";
1041 else if (p->type == fs_param_is_string)
1042 type = "string";
1043 else
1044 type = "unknown";
1045
1046 seq_printf(m, "%s:%s\n", p->name, type);
1047 }
1048
1049 return 0;
1050 }
1051
1052 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1053 {
1054 return single_open(file, cifs_mount_params_proc_show, NULL);
1055 }
1056
1057 static const struct proc_ops cifs_mount_params_proc_ops = {
1058 .proc_open = cifs_mount_params_proc_open,
1059 .proc_read = seq_read,
1060 .proc_lseek = seq_lseek,
1061 .proc_release = single_release,
1062 /* No need for write for now */
1063 /* .proc_write = cifs_mount_params_proc_write, */
1064 };
1065
1066 #else
1067 inline void cifs_proc_init(void)
1068 {
1069 }
1070
1071 inline void cifs_proc_clean(void)
1072 {
1073 }
1074 #endif /* PROC_FS */
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