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 = buf;
40
41 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n",
42 smb->Command, smb->Status.CifsError, smb->Flags,
43 smb->Flags2, smb->Mid, smb->Pid, smb->WordCount);
44 if (!server->ops->check_message(buf, server->total_read, server)) {
45 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
46 server->ops->calc_smb_size(smb));
47 }
48 #endif /* CONFIG_CIFS_DEBUG2 */
49 }
50
cifs_dump_mids(struct TCP_Server_Info * server)51 void cifs_dump_mids(struct TCP_Server_Info *server)
52 {
53 #ifdef CONFIG_CIFS_DEBUG2
54 struct mid_q_entry *mid_entry;
55
56 if (server == NULL)
57 return;
58
59 cifs_dbg(VFS, "Dump pending requests:\n");
60 spin_lock(&server->mid_lock);
61 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
62 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
63 mid_entry->mid_state,
64 le16_to_cpu(mid_entry->command),
65 mid_entry->pid,
66 mid_entry->callback_data,
67 mid_entry->mid);
68 #ifdef CONFIG_CIFS_STATS2
69 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
70 mid_entry->large_buf,
71 mid_entry->resp_buf,
72 mid_entry->when_received,
73 jiffies);
74 #endif /* STATS2 */
75 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
76 mid_entry->multiRsp, mid_entry->multiEnd);
77 if (mid_entry->resp_buf) {
78 cifs_dump_detail(mid_entry->resp_buf, server);
79 cifs_dump_mem("existing buf: ",
80 mid_entry->resp_buf, 62);
81 }
82 }
83 spin_unlock(&server->mid_lock);
84 #endif /* CONFIG_CIFS_DEBUG2 */
85 }
86
87 #ifdef CONFIG_PROC_FS
cifs_debug_tcon(struct seq_file * m,struct cifs_tcon * tcon)88 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
89 {
90 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
91
92 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
93 if (tcon->nativeFileSystem)
94 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
95 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
96 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
97 le32_to_cpu(tcon->fsAttrInfo.Attributes),
98 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
99 tcon->status);
100 if (dev_type == FILE_DEVICE_DISK)
101 seq_puts(m, " type: DISK ");
102 else if (dev_type == FILE_DEVICE_CD_ROM)
103 seq_puts(m, " type: CDROM ");
104 else
105 seq_printf(m, " type: %d ", dev_type);
106
107 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
108
109 if ((tcon->seal) ||
110 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
111 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
112 seq_printf(m, " Encrypted");
113 if (tcon->nocase)
114 seq_printf(m, " nocase");
115 if (tcon->unix_ext)
116 seq_printf(m, " POSIX Extensions");
117 if (tcon->ses->server->ops->dump_share_caps)
118 tcon->ses->server->ops->dump_share_caps(m, tcon);
119 if (tcon->use_witness)
120 seq_puts(m, " Witness");
121 if (tcon->broken_sparse_sup)
122 seq_puts(m, " nosparse");
123 if (tcon->need_reconnect)
124 seq_puts(m, "\tDISCONNECTED ");
125 seq_putc(m, '\n');
126 }
127
128 static void
cifs_dump_channel(struct seq_file * m,int i,struct cifs_chan * chan)129 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
130 {
131 struct TCP_Server_Info *server = chan->server;
132
133 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
134 "\n\t\tNumber of credits: %d Dialect 0x%x"
135 "\n\t\tTCP status: %d Instance: %d"
136 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
137 "\n\t\tIn Send: %d In MaxReq Wait: %d",
138 i+1, server->conn_id,
139 server->credits,
140 server->dialect,
141 server->tcpStatus,
142 server->reconnect_instance,
143 server->srv_count,
144 server->sec_mode,
145 in_flight(server),
146 atomic_read(&server->in_send),
147 atomic_read(&server->num_waiters));
148 }
149
150 static void
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)151 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
152 {
153 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
154 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
155
156 seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
157 seq_puts(m, "\t\tCapabilities: ");
158 if (iface->rdma_capable)
159 seq_puts(m, "rdma ");
160 if (iface->rss_capable)
161 seq_puts(m, "rss ");
162 seq_putc(m, '\n');
163 if (iface->sockaddr.ss_family == AF_INET)
164 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
165 else if (iface->sockaddr.ss_family == AF_INET6)
166 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
167 if (!iface->is_active)
168 seq_puts(m, "\t\t[for-cleanup]\n");
169 }
170
cifs_debug_files_proc_show(struct seq_file * m,void * v)171 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
172 {
173 struct TCP_Server_Info *server;
174 struct cifs_ses *ses;
175 struct cifs_tcon *tcon;
176 struct cifsFileInfo *cfile;
177
178 seq_puts(m, "# Version:1\n");
179 seq_puts(m, "# Format:\n");
180 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
181 #ifdef CONFIG_CIFS_DEBUG2
182 seq_printf(m, " <filename> <mid>\n");
183 #else
184 seq_printf(m, " <filename>\n");
185 #endif /* CIFS_DEBUG2 */
186 spin_lock(&cifs_tcp_ses_lock);
187 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
188 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
189 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
190 spin_lock(&tcon->open_file_lock);
191 list_for_each_entry(cfile, &tcon->openFileList, 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 mid_q_entry *mid_entry;
220 struct TCP_Server_Info *server;
221 struct TCP_Server_Info *chan_server;
222 struct cifs_ses *ses;
223 struct cifs_tcon *tcon;
224 struct cifs_server_iface *iface;
225 size_t iface_weight = 0, iface_min_speed = 0;
226 struct cifs_server_iface *last_iface = NULL;
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 spin_lock(&server->srv_lock);
287 if (server->hostname)
288 seq_printf(m, "Hostname: %s ", server->hostname);
289 spin_unlock(&server->srv_lock);
290 #ifdef CONFIG_CIFS_SMB_DIRECT
291 if (!server->rdma)
292 goto skip_rdma;
293
294 if (!server->smbd_conn) {
295 seq_printf(m, "\nSMBDirect transport not available");
296 goto skip_rdma;
297 }
298
299 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
300 "transport status: %x",
301 server->smbd_conn->protocol,
302 server->smbd_conn->transport_status);
303 seq_printf(m, "\nConn receive_credit_max: %x "
304 "send_credit_target: %x max_send_size: %x",
305 server->smbd_conn->receive_credit_max,
306 server->smbd_conn->send_credit_target,
307 server->smbd_conn->max_send_size);
308 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
309 "max_fragmented_send_size: %x max_receive_size:%x",
310 server->smbd_conn->max_fragmented_recv_size,
311 server->smbd_conn->max_fragmented_send_size,
312 server->smbd_conn->max_receive_size);
313 seq_printf(m, "\nConn keep_alive_interval: %x "
314 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
315 server->smbd_conn->keep_alive_interval,
316 server->smbd_conn->max_readwrite_size,
317 server->smbd_conn->rdma_readwrite_threshold);
318 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
319 "count_put_receive_buffer: %x count_send_empty: %x",
320 server->smbd_conn->count_get_receive_buffer,
321 server->smbd_conn->count_put_receive_buffer,
322 server->smbd_conn->count_send_empty);
323 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
324 "count_enqueue_reassembly_queue: %x "
325 "count_dequeue_reassembly_queue: %x "
326 "fragment_reassembly_remaining: %x "
327 "reassembly_data_length: %x "
328 "reassembly_queue_length: %x",
329 server->smbd_conn->count_reassembly_queue,
330 server->smbd_conn->count_enqueue_reassembly_queue,
331 server->smbd_conn->count_dequeue_reassembly_queue,
332 server->smbd_conn->fragment_reassembly_remaining,
333 server->smbd_conn->reassembly_data_length,
334 server->smbd_conn->reassembly_queue_length);
335 seq_printf(m, "\nCurrent Credits send_credits: %x "
336 "receive_credits: %x receive_credit_target: %x",
337 atomic_read(&server->smbd_conn->send_credits),
338 atomic_read(&server->smbd_conn->receive_credits),
339 server->smbd_conn->receive_credit_target);
340 seq_printf(m, "\nPending send_pending: %x ",
341 atomic_read(&server->smbd_conn->send_pending));
342 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
343 "count_empty_packet_queue: %x",
344 server->smbd_conn->count_receive_queue,
345 server->smbd_conn->count_empty_packet_queue);
346 seq_printf(m, "\nMR responder_resources: %x "
347 "max_frmr_depth: %x mr_type: %x",
348 server->smbd_conn->responder_resources,
349 server->smbd_conn->max_frmr_depth,
350 server->smbd_conn->mr_type);
351 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
352 atomic_read(&server->smbd_conn->mr_ready_count),
353 atomic_read(&server->smbd_conn->mr_used_count));
354 skip_rdma:
355 #endif
356 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
357 server->credits, server->dialect);
358 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
359 seq_printf(m, " COMPRESS_LZNT1");
360 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
361 seq_printf(m, " COMPRESS_LZ77");
362 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
363 seq_printf(m, " COMPRESS_LZ77_HUFF");
364 if (server->sign)
365 seq_printf(m, " signed");
366 if (server->posix_ext_supported)
367 seq_printf(m, " posix");
368 if (server->nosharesock)
369 seq_printf(m, " nosharesock");
370
371 if (server->rdma)
372 seq_printf(m, "\nRDMA ");
373 seq_printf(m, "\nTCP status: %d Instance: %d"
374 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
375 server->tcpStatus,
376 server->reconnect_instance,
377 server->srv_count,
378 server->sec_mode, in_flight(server));
379
380 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
381 atomic_read(&server->in_send),
382 atomic_read(&server->num_waiters));
383
384 seq_printf(m, "\n\n\tSessions: ");
385 i = 0;
386 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
387 spin_lock(&ses->ses_lock);
388 if (ses->ses_status == SES_EXITING) {
389 spin_unlock(&ses->ses_lock);
390 continue;
391 }
392 i++;
393 if ((ses->serverDomain == NULL) ||
394 (ses->serverOS == NULL) ||
395 (ses->serverNOS == NULL)) {
396 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
397 i, ses->ip_addr, ses->ses_count,
398 ses->capabilities, ses->ses_status);
399 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
400 seq_printf(m, "Guest ");
401 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
402 seq_printf(m, "Anonymous ");
403 } else {
404 seq_printf(m,
405 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
406 "\n\tNOS: %s\tCapability: 0x%x"
407 "\n\tSMB session status: %d ",
408 i, ses->ip_addr, ses->serverDomain,
409 ses->ses_count, ses->serverOS, ses->serverNOS,
410 ses->capabilities, ses->ses_status);
411 }
412 spin_unlock(&ses->ses_lock);
413
414 seq_printf(m, "\n\tSecurity type: %s ",
415 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
416
417 /* dump session id helpful for use with network trace */
418 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
419 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
420 seq_puts(m, " encrypted");
421 if (ses->sign)
422 seq_puts(m, " signed");
423
424 seq_printf(m, "\n\tUser: %d Cred User: %d",
425 from_kuid(&init_user_ns, ses->linux_uid),
426 from_kuid(&init_user_ns, ses->cred_uid));
427
428 spin_lock(&ses->chan_lock);
429 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
430 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
431 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
432 seq_puts(m, "\t[RECONNECTING] ");
433
434 if (ses->chan_count > 1) {
435 seq_printf(m, "\n\n\tExtra Channels: %zu ",
436 ses->chan_count-1);
437 for (j = 1; j < ses->chan_count; j++) {
438 cifs_dump_channel(m, j, &ses->chans[j]);
439 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
440 seq_puts(m, "\tDISCONNECTED ");
441 if (CIFS_CHAN_IN_RECONNECT(ses, j))
442 seq_puts(m, "\t[RECONNECTING] ");
443 }
444 }
445 spin_unlock(&ses->chan_lock);
446
447 seq_puts(m, "\n\n\tShares: ");
448 j = 0;
449
450 seq_printf(m, "\n\t%d) IPC: ", j);
451 if (ses->tcon_ipc)
452 cifs_debug_tcon(m, ses->tcon_ipc);
453 else
454 seq_puts(m, "none\n");
455
456 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
457 ++j;
458 seq_printf(m, "\n\t%d) ", j);
459 cifs_debug_tcon(m, tcon);
460 }
461
462 spin_lock(&ses->iface_lock);
463 if (ses->iface_count)
464 seq_printf(m, "\n\n\tServer interfaces: %zu"
465 "\tLast updated: %lu seconds ago",
466 ses->iface_count,
467 (jiffies - ses->iface_last_update) / HZ);
468
469 last_iface = list_last_entry(&ses->iface_list,
470 struct cifs_server_iface,
471 iface_head);
472 iface_min_speed = last_iface->speed;
473
474 j = 0;
475 list_for_each_entry(iface, &ses->iface_list,
476 iface_head) {
477 seq_printf(m, "\n\t%d)", ++j);
478 cifs_dump_iface(m, iface);
479
480 iface_weight = iface->speed / iface_min_speed;
481 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
482 "\n\t\tAllocated channels: %u\n",
483 iface->weight_fulfilled,
484 iface_weight,
485 iface->num_channels);
486
487 if (is_ses_using_iface(ses, iface))
488 seq_puts(m, "\t\t[CONNECTED]\n");
489 }
490 spin_unlock(&ses->iface_lock);
491
492 seq_puts(m, "\n\n\tMIDs: ");
493 spin_lock(&ses->chan_lock);
494 for (j = 0; j < ses->chan_count; j++) {
495 chan_server = ses->chans[j].server;
496 if (!chan_server)
497 continue;
498
499 if (list_empty(&chan_server->pending_mid_q))
500 continue;
501
502 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
503 chan_server->conn_id);
504 spin_lock(&chan_server->mid_lock);
505 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
506 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
507 mid_entry->mid_state,
508 le16_to_cpu(mid_entry->command),
509 mid_entry->pid,
510 mid_entry->callback_data,
511 mid_entry->mid);
512 }
513 spin_unlock(&chan_server->mid_lock);
514 }
515 spin_unlock(&ses->chan_lock);
516 seq_puts(m, "\n--\n");
517 }
518 if (i == 0)
519 seq_printf(m, "\n\t\t[NONE]");
520 }
521 if (c == 0)
522 seq_printf(m, "\n\t[NONE]");
523
524 spin_unlock(&cifs_tcp_ses_lock);
525 seq_putc(m, '\n');
526 cifs_swn_dump(m);
527
528 /* BB add code to dump additional info such as TCP session info now */
529 return 0;
530 }
531
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)532 static ssize_t cifs_stats_proc_write(struct file *file,
533 const char __user *buffer, size_t count, loff_t *ppos)
534 {
535 bool bv;
536 int rc;
537 struct TCP_Server_Info *server;
538 struct cifs_ses *ses;
539 struct cifs_tcon *tcon;
540
541 rc = kstrtobool_from_user(buffer, count, &bv);
542 if (rc == 0) {
543 #ifdef CONFIG_CIFS_STATS2
544 int i;
545
546 atomic_set(&total_buf_alloc_count, 0);
547 atomic_set(&total_small_buf_alloc_count, 0);
548 #endif /* CONFIG_CIFS_STATS2 */
549 atomic_set(&tcpSesReconnectCount, 0);
550 atomic_set(&tconInfoReconnectCount, 0);
551
552 spin_lock(&GlobalMid_Lock);
553 GlobalMaxActiveXid = 0;
554 GlobalCurrentXid = 0;
555 spin_unlock(&GlobalMid_Lock);
556 spin_lock(&cifs_tcp_ses_lock);
557 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
558 server->max_in_flight = 0;
559 #ifdef CONFIG_CIFS_STATS2
560 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
561 atomic_set(&server->num_cmds[i], 0);
562 atomic_set(&server->smb2slowcmd[i], 0);
563 server->time_per_cmd[i] = 0;
564 server->slowest_cmd[i] = 0;
565 server->fastest_cmd[0] = 0;
566 }
567 #endif /* CONFIG_CIFS_STATS2 */
568 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
569 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
570 atomic_set(&tcon->num_smbs_sent, 0);
571 spin_lock(&tcon->stat_lock);
572 tcon->bytes_read = 0;
573 tcon->bytes_written = 0;
574 spin_unlock(&tcon->stat_lock);
575 if (server->ops->clear_stats)
576 server->ops->clear_stats(tcon);
577 }
578 }
579 }
580 spin_unlock(&cifs_tcp_ses_lock);
581 } else {
582 return rc;
583 }
584
585 return count;
586 }
587
cifs_stats_proc_show(struct seq_file * m,void * v)588 static int cifs_stats_proc_show(struct seq_file *m, void *v)
589 {
590 int i;
591 #ifdef CONFIG_CIFS_STATS2
592 int j;
593 #endif /* STATS2 */
594 struct TCP_Server_Info *server;
595 struct cifs_ses *ses;
596 struct cifs_tcon *tcon;
597
598 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
599 sesInfoAllocCount.counter);
600 seq_printf(m, "Share (unique mount targets): %d\n",
601 tconInfoAllocCount.counter);
602 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
603 buf_alloc_count.counter,
604 cifs_min_rcv + tcpSesAllocCount.counter);
605 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
606 small_buf_alloc_count.counter, cifs_min_small);
607 #ifdef CONFIG_CIFS_STATS2
608 seq_printf(m, "Total Large %d Small %d Allocations\n",
609 atomic_read(&total_buf_alloc_count),
610 atomic_read(&total_small_buf_alloc_count));
611 #endif /* CONFIG_CIFS_STATS2 */
612
613 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
614 seq_printf(m,
615 "\n%d session %d share reconnects\n",
616 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
617
618 seq_printf(m,
619 "Total vfs operations: %d maximum at one time: %d\n",
620 GlobalCurrentXid, GlobalMaxActiveXid);
621
622 i = 0;
623 spin_lock(&cifs_tcp_ses_lock);
624 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
625 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
626 #ifdef CONFIG_CIFS_STATS2
627 seq_puts(m, "\nTotal time spent processing by command. Time ");
628 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
629 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
630 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
631 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
632 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
633 atomic_read(&server->num_cmds[j]),
634 server->time_per_cmd[j],
635 server->fastest_cmd[j],
636 server->slowest_cmd[j]);
637 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
638 if (atomic_read(&server->smb2slowcmd[j])) {
639 spin_lock(&server->srv_lock);
640 seq_printf(m, " %d slow responses from %s for command %d\n",
641 atomic_read(&server->smb2slowcmd[j]),
642 server->hostname, j);
643 spin_unlock(&server->srv_lock);
644 }
645 #endif /* STATS2 */
646 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
647 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
648 i++;
649 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
650 if (tcon->need_reconnect)
651 seq_puts(m, "\tDISCONNECTED ");
652 seq_printf(m, "\nSMBs: %d",
653 atomic_read(&tcon->num_smbs_sent));
654 if (server->ops->print_stats)
655 server->ops->print_stats(m, tcon);
656 }
657 }
658 }
659 spin_unlock(&cifs_tcp_ses_lock);
660
661 seq_putc(m, '\n');
662 return 0;
663 }
664
cifs_stats_proc_open(struct inode * inode,struct file * file)665 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
666 {
667 return single_open(file, cifs_stats_proc_show, NULL);
668 }
669
670 static const struct proc_ops cifs_stats_proc_ops = {
671 .proc_open = cifs_stats_proc_open,
672 .proc_read = seq_read,
673 .proc_lseek = seq_lseek,
674 .proc_release = single_release,
675 .proc_write = cifs_stats_proc_write,
676 };
677
678 #ifdef CONFIG_CIFS_SMB_DIRECT
679 #define PROC_FILE_DEFINE(name) \
680 static ssize_t name##_write(struct file *file, const char __user *buffer, \
681 size_t count, loff_t *ppos) \
682 { \
683 int rc; \
684 rc = kstrtoint_from_user(buffer, count, 10, & name); \
685 if (rc) \
686 return rc; \
687 return count; \
688 } \
689 static int name##_proc_show(struct seq_file *m, void *v) \
690 { \
691 seq_printf(m, "%d\n", name ); \
692 return 0; \
693 } \
694 static int name##_open(struct inode *inode, struct file *file) \
695 { \
696 return single_open(file, name##_proc_show, NULL); \
697 } \
698 \
699 static const struct proc_ops cifs_##name##_proc_fops = { \
700 .proc_open = name##_open, \
701 .proc_read = seq_read, \
702 .proc_lseek = seq_lseek, \
703 .proc_release = single_release, \
704 .proc_write = name##_write, \
705 }
706
707 PROC_FILE_DEFINE(rdma_readwrite_threshold);
708 PROC_FILE_DEFINE(smbd_max_frmr_depth);
709 PROC_FILE_DEFINE(smbd_keep_alive_interval);
710 PROC_FILE_DEFINE(smbd_max_receive_size);
711 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
712 PROC_FILE_DEFINE(smbd_max_send_size);
713 PROC_FILE_DEFINE(smbd_send_credit_target);
714 PROC_FILE_DEFINE(smbd_receive_credit_max);
715 #endif
716
717 static struct proc_dir_entry *proc_fs_cifs;
718 static const struct proc_ops cifsFYI_proc_ops;
719 static const struct proc_ops cifs_lookup_cache_proc_ops;
720 static const struct proc_ops traceSMB_proc_ops;
721 static const struct proc_ops cifs_security_flags_proc_ops;
722 static const struct proc_ops cifs_linux_ext_proc_ops;
723 static const struct proc_ops cifs_mount_params_proc_ops;
724
725 void
cifs_proc_init(void)726 cifs_proc_init(void)
727 {
728 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
729 if (proc_fs_cifs == NULL)
730 return;
731
732 proc_create_single("DebugData", 0, proc_fs_cifs,
733 cifs_debug_data_proc_show);
734
735 proc_create_single("open_files", 0400, proc_fs_cifs,
736 cifs_debug_files_proc_show);
737
738 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
739 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
740 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
741 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
742 &cifs_linux_ext_proc_ops);
743 proc_create("SecurityFlags", 0644, proc_fs_cifs,
744 &cifs_security_flags_proc_ops);
745 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
746 &cifs_lookup_cache_proc_ops);
747
748 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
749
750 #ifdef CONFIG_CIFS_DFS_UPCALL
751 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
752 #endif
753
754 #ifdef CONFIG_CIFS_SMB_DIRECT
755 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
756 &cifs_rdma_readwrite_threshold_proc_fops);
757 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
758 &cifs_smbd_max_frmr_depth_proc_fops);
759 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
760 &cifs_smbd_keep_alive_interval_proc_fops);
761 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
762 &cifs_smbd_max_receive_size_proc_fops);
763 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
764 &cifs_smbd_max_fragmented_recv_size_proc_fops);
765 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
766 &cifs_smbd_max_send_size_proc_fops);
767 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
768 &cifs_smbd_send_credit_target_proc_fops);
769 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
770 &cifs_smbd_receive_credit_max_proc_fops);
771 #endif
772 }
773
774 void
cifs_proc_clean(void)775 cifs_proc_clean(void)
776 {
777 if (proc_fs_cifs == NULL)
778 return;
779
780 remove_proc_entry("DebugData", proc_fs_cifs);
781 remove_proc_entry("open_files", proc_fs_cifs);
782 remove_proc_entry("cifsFYI", proc_fs_cifs);
783 remove_proc_entry("traceSMB", proc_fs_cifs);
784 remove_proc_entry("Stats", proc_fs_cifs);
785 remove_proc_entry("SecurityFlags", proc_fs_cifs);
786 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
787 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
788 remove_proc_entry("mount_params", proc_fs_cifs);
789
790 #ifdef CONFIG_CIFS_DFS_UPCALL
791 remove_proc_entry("dfscache", proc_fs_cifs);
792 #endif
793 #ifdef CONFIG_CIFS_SMB_DIRECT
794 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
795 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
796 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
797 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
798 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
799 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
800 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
801 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
802 #endif
803 remove_proc_entry("fs/cifs", NULL);
804 }
805
cifsFYI_proc_show(struct seq_file * m,void * v)806 static int cifsFYI_proc_show(struct seq_file *m, void *v)
807 {
808 seq_printf(m, "%d\n", cifsFYI);
809 return 0;
810 }
811
cifsFYI_proc_open(struct inode * inode,struct file * file)812 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
813 {
814 return single_open(file, cifsFYI_proc_show, NULL);
815 }
816
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)817 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
818 size_t count, loff_t *ppos)
819 {
820 char c[2] = { '\0' };
821 bool bv;
822 int rc;
823
824 rc = get_user(c[0], buffer);
825 if (rc)
826 return rc;
827 if (strtobool(c, &bv) == 0)
828 cifsFYI = bv;
829 else if ((c[0] > '1') && (c[0] <= '9'))
830 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
831 else
832 return -EINVAL;
833
834 return count;
835 }
836
837 static const struct proc_ops cifsFYI_proc_ops = {
838 .proc_open = cifsFYI_proc_open,
839 .proc_read = seq_read,
840 .proc_lseek = seq_lseek,
841 .proc_release = single_release,
842 .proc_write = cifsFYI_proc_write,
843 };
844
cifs_linux_ext_proc_show(struct seq_file * m,void * v)845 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
846 {
847 seq_printf(m, "%d\n", linuxExtEnabled);
848 return 0;
849 }
850
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)851 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
852 {
853 return single_open(file, cifs_linux_ext_proc_show, NULL);
854 }
855
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)856 static ssize_t cifs_linux_ext_proc_write(struct file *file,
857 const char __user *buffer, size_t count, loff_t *ppos)
858 {
859 int rc;
860
861 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
862 if (rc)
863 return rc;
864
865 return count;
866 }
867
868 static const struct proc_ops cifs_linux_ext_proc_ops = {
869 .proc_open = cifs_linux_ext_proc_open,
870 .proc_read = seq_read,
871 .proc_lseek = seq_lseek,
872 .proc_release = single_release,
873 .proc_write = cifs_linux_ext_proc_write,
874 };
875
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)876 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
877 {
878 seq_printf(m, "%d\n", lookupCacheEnabled);
879 return 0;
880 }
881
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)882 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
883 {
884 return single_open(file, cifs_lookup_cache_proc_show, NULL);
885 }
886
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)887 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
888 const char __user *buffer, size_t count, loff_t *ppos)
889 {
890 int rc;
891
892 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
893 if (rc)
894 return rc;
895
896 return count;
897 }
898
899 static const struct proc_ops cifs_lookup_cache_proc_ops = {
900 .proc_open = cifs_lookup_cache_proc_open,
901 .proc_read = seq_read,
902 .proc_lseek = seq_lseek,
903 .proc_release = single_release,
904 .proc_write = cifs_lookup_cache_proc_write,
905 };
906
traceSMB_proc_show(struct seq_file * m,void * v)907 static int traceSMB_proc_show(struct seq_file *m, void *v)
908 {
909 seq_printf(m, "%d\n", traceSMB);
910 return 0;
911 }
912
traceSMB_proc_open(struct inode * inode,struct file * file)913 static int traceSMB_proc_open(struct inode *inode, struct file *file)
914 {
915 return single_open(file, traceSMB_proc_show, NULL);
916 }
917
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)918 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
919 size_t count, loff_t *ppos)
920 {
921 int rc;
922
923 rc = kstrtobool_from_user(buffer, count, &traceSMB);
924 if (rc)
925 return rc;
926
927 return count;
928 }
929
930 static const struct proc_ops traceSMB_proc_ops = {
931 .proc_open = traceSMB_proc_open,
932 .proc_read = seq_read,
933 .proc_lseek = seq_lseek,
934 .proc_release = single_release,
935 .proc_write = traceSMB_proc_write,
936 };
937
cifs_security_flags_proc_show(struct seq_file * m,void * v)938 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
939 {
940 seq_printf(m, "0x%x\n", global_secflags);
941 return 0;
942 }
943
cifs_security_flags_proc_open(struct inode * inode,struct file * file)944 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
945 {
946 return single_open(file, cifs_security_flags_proc_show, NULL);
947 }
948
949 /*
950 * Ensure that if someone sets a MUST flag, that we disable all other MAY
951 * flags except for the ones corresponding to the given MUST flag. If there are
952 * multiple MUST flags, then try to prefer more secure ones.
953 */
954 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)955 cifs_security_flags_handle_must_flags(unsigned int *flags)
956 {
957 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
958
959 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
960 *flags = CIFSSEC_MUST_KRB5;
961 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
962 *flags = CIFSSEC_MUST_NTLMSSP;
963 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
964 *flags = CIFSSEC_MUST_NTLMV2;
965
966 *flags |= signflags;
967 }
968
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)969 static ssize_t cifs_security_flags_proc_write(struct file *file,
970 const char __user *buffer, size_t count, loff_t *ppos)
971 {
972 int rc;
973 unsigned int flags;
974 char flags_string[12];
975 bool bv;
976
977 if ((count < 1) || (count > 11))
978 return -EINVAL;
979
980 memset(flags_string, 0, 12);
981
982 if (copy_from_user(flags_string, buffer, count))
983 return -EFAULT;
984
985 if (count < 3) {
986 /* single char or single char followed by null */
987 if (strtobool(flags_string, &bv) == 0) {
988 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
989 return count;
990 } else if (!isdigit(flags_string[0])) {
991 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
992 flags_string);
993 return -EINVAL;
994 }
995 }
996
997 /* else we have a number */
998 rc = kstrtouint(flags_string, 0, &flags);
999 if (rc) {
1000 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1001 flags_string);
1002 return rc;
1003 }
1004
1005 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1006
1007 if (flags == 0) {
1008 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1009 return -EINVAL;
1010 }
1011
1012 if (flags & ~CIFSSEC_MASK) {
1013 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1014 flags & ~CIFSSEC_MASK);
1015 return -EINVAL;
1016 }
1017
1018 cifs_security_flags_handle_must_flags(&flags);
1019
1020 /* flags look ok - update the global security flags for cifs module */
1021 global_secflags = flags;
1022 if (global_secflags & CIFSSEC_MUST_SIGN) {
1023 /* requiring signing implies signing is allowed */
1024 global_secflags |= CIFSSEC_MAY_SIGN;
1025 cifs_dbg(FYI, "packet signing now required\n");
1026 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1027 cifs_dbg(FYI, "packet signing disabled\n");
1028 }
1029 /* BB should we turn on MAY flags for other MUST options? */
1030 return count;
1031 }
1032
1033 static const struct proc_ops cifs_security_flags_proc_ops = {
1034 .proc_open = cifs_security_flags_proc_open,
1035 .proc_read = seq_read,
1036 .proc_lseek = seq_lseek,
1037 .proc_release = single_release,
1038 .proc_write = cifs_security_flags_proc_write,
1039 };
1040
1041 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file * m,void * v)1042 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1043 {
1044 const struct fs_parameter_spec *p;
1045 const char *type;
1046
1047 for (p = smb3_fs_parameters; p->name; p++) {
1048 /* cannot use switch with pointers... */
1049 if (!p->type) {
1050 if (p->flags == fs_param_neg_with_no)
1051 type = "noflag";
1052 else
1053 type = "flag";
1054 } else if (p->type == fs_param_is_bool)
1055 type = "bool";
1056 else if (p->type == fs_param_is_u32)
1057 type = "u32";
1058 else if (p->type == fs_param_is_u64)
1059 type = "u64";
1060 else if (p->type == fs_param_is_string)
1061 type = "string";
1062 else
1063 type = "unknown";
1064
1065 seq_printf(m, "%s:%s\n", p->name, type);
1066 }
1067
1068 return 0;
1069 }
1070
cifs_mount_params_proc_open(struct inode * inode,struct file * file)1071 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1072 {
1073 return single_open(file, cifs_mount_params_proc_show, NULL);
1074 }
1075
1076 static const struct proc_ops cifs_mount_params_proc_ops = {
1077 .proc_open = cifs_mount_params_proc_open,
1078 .proc_read = seq_read,
1079 .proc_lseek = seq_lseek,
1080 .proc_release = single_release,
1081 /* No need for write for now */
1082 /* .proc_write = cifs_mount_params_proc_write, */
1083 };
1084
1085 #else
cifs_proc_init(void)1086 inline void cifs_proc_init(void)
1087 {
1088 }
1089
cifs_proc_clean(void)1090 inline void cifs_proc_clean(void)
1091 {
1092 }
1093 #endif /* PROC_FS */
1094