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