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/kstrtox.h>
12 #include <linux/module.h>
13 #include <linux/proc_fs.h>
14 #include <linux/uaccess.h>
15 #include "cifspdu.h"
16 #include "cifsglob.h"
17 #include "cifsproto.h"
18 #include "cifs_debug.h"
19 #include "cifsfs.h"
20 #include "fs_context.h"
21 #ifdef CONFIG_CIFS_DFS_UPCALL
22 #include "dfs_cache.h"
23 #endif
24 #ifdef CONFIG_CIFS_SMB_DIRECT
25 #include "smbdirect.h"
26 #endif
27 #include "cifs_swn.h"
28
29 void
cifs_dump_mem(char * label,void * data,int length)30 cifs_dump_mem(char *label, void *data, int length)
31 {
32 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
33 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
34 data, length, true);
35 }
36
cifs_dump_detail(void * buf,struct TCP_Server_Info * server)37 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
38 {
39 #ifdef CONFIG_CIFS_DEBUG2
40 struct smb_hdr *smb = buf;
41
42 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
43 smb->Command, smb->Status.CifsError,
44 smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
45 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
46 server->ops->calc_smb_size(smb));
47 #endif /* CONFIG_CIFS_DEBUG2 */
48 }
49
cifs_dump_mids(struct TCP_Server_Info * server)50 void cifs_dump_mids(struct TCP_Server_Info *server)
51 {
52 #ifdef CONFIG_CIFS_DEBUG2
53 struct mid_q_entry *mid_entry;
54
55 if (server == NULL)
56 return;
57
58 cifs_dbg(VFS, "Dump pending requests:\n");
59 spin_lock(&server->mid_lock);
60 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
61 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
62 mid_entry->mid_state,
63 le16_to_cpu(mid_entry->command),
64 mid_entry->pid,
65 mid_entry->callback_data,
66 mid_entry->mid);
67 #ifdef CONFIG_CIFS_STATS2
68 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
69 mid_entry->large_buf,
70 mid_entry->resp_buf,
71 mid_entry->when_received,
72 jiffies);
73 #endif /* STATS2 */
74 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
75 mid_entry->multiRsp, mid_entry->multiEnd);
76 if (mid_entry->resp_buf) {
77 cifs_dump_detail(mid_entry->resp_buf, server);
78 cifs_dump_mem("existing buf: ",
79 mid_entry->resp_buf, 62);
80 }
81 }
82 spin_unlock(&server->mid_lock);
83 #endif /* CONFIG_CIFS_DEBUG2 */
84 }
85
86 #ifdef CONFIG_PROC_FS
cifs_debug_tcon(struct seq_file * m,struct cifs_tcon * tcon)87 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
88 {
89 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
90
91 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
92 if (tcon->nativeFileSystem)
93 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
94 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
95 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
96 le32_to_cpu(tcon->fsAttrInfo.Attributes),
97 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
98 tcon->status);
99 if (dev_type == FILE_DEVICE_DISK)
100 seq_puts(m, " type: DISK ");
101 else if (dev_type == FILE_DEVICE_CD_ROM)
102 seq_puts(m, " type: CDROM ");
103 else
104 seq_printf(m, " type: %d ", dev_type);
105
106 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
107
108 if ((tcon->seal) ||
109 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
110 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
111 seq_printf(m, " Encrypted");
112 if (tcon->nocase)
113 seq_printf(m, " nocase");
114 if (tcon->unix_ext)
115 seq_printf(m, " POSIX Extensions");
116 if (tcon->ses->server->ops->dump_share_caps)
117 tcon->ses->server->ops->dump_share_caps(m, tcon);
118 if (tcon->use_witness)
119 seq_puts(m, " Witness");
120 if (tcon->broken_sparse_sup)
121 seq_puts(m, " nosparse");
122 if (tcon->need_reconnect)
123 seq_puts(m, "\tDISCONNECTED ");
124 seq_putc(m, '\n');
125 }
126
127 static void
cifs_dump_channel(struct seq_file * m,int i,struct cifs_chan * chan)128 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
129 {
130 struct TCP_Server_Info *server = chan->server;
131
132 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
133 "\n\t\tNumber of credits: %d Dialect 0x%x"
134 "\n\t\tTCP status: %d Instance: %d"
135 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
136 "\n\t\tIn Send: %d In MaxReq Wait: %d",
137 i+1, server->conn_id,
138 server->credits,
139 server->dialect,
140 server->tcpStatus,
141 server->reconnect_instance,
142 server->srv_count,
143 server->sec_mode,
144 in_flight(server),
145 atomic_read(&server->in_send),
146 atomic_read(&server->num_waiters));
147 }
148
149 static void
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)150 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
151 {
152 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
153 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
154
155 seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
156 seq_puts(m, "\t\tCapabilities: ");
157 if (iface->rdma_capable)
158 seq_puts(m, "rdma ");
159 if (iface->rss_capable)
160 seq_puts(m, "rss ");
161 seq_putc(m, '\n');
162 if (iface->sockaddr.ss_family == AF_INET)
163 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
164 else if (iface->sockaddr.ss_family == AF_INET6)
165 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
166 if (!iface->is_active)
167 seq_puts(m, "\t\t[for-cleanup]\n");
168 }
169
cifs_debug_files_proc_show(struct seq_file * m,void * v)170 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
171 {
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_entry(ses, &server->smb_ses_list, smb_ses_list) {
188 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
189 spin_lock(&tcon->open_file_lock);
190 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
191 seq_printf(m,
192 "0x%x 0x%llx 0x%x %d %d %d %pd",
193 tcon->tid,
194 cfile->fid.persistent_fid,
195 cfile->f_flags,
196 cfile->count,
197 cfile->pid,
198 from_kuid(&init_user_ns, cfile->uid),
199 cfile->dentry);
200 #ifdef CONFIG_CIFS_DEBUG2
201 seq_printf(m, " %llu\n", cfile->fid.mid);
202 #else
203 seq_printf(m, "\n");
204 #endif /* CIFS_DEBUG2 */
205 }
206 spin_unlock(&tcon->open_file_lock);
207 }
208 }
209 }
210 spin_unlock(&cifs_tcp_ses_lock);
211 seq_putc(m, '\n');
212 return 0;
213 }
214
cifs_debug_data_proc_show(struct seq_file * m,void * v)215 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
216 {
217 struct mid_q_entry *mid_entry;
218 struct TCP_Server_Info *server;
219 struct cifs_ses *ses;
220 struct cifs_tcon *tcon;
221 struct cifs_server_iface *iface;
222 int c, i, j;
223
224 seq_puts(m,
225 "Display Internal CIFS Data Structures for Debugging\n"
226 "---------------------------------------------------\n");
227 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
228 seq_printf(m, "Features:");
229 #ifdef CONFIG_CIFS_DFS_UPCALL
230 seq_printf(m, " DFS");
231 #endif
232 #ifdef CONFIG_CIFS_FSCACHE
233 seq_printf(m, ",FSCACHE");
234 #endif
235 #ifdef CONFIG_CIFS_SMB_DIRECT
236 seq_printf(m, ",SMB_DIRECT");
237 #endif
238 #ifdef CONFIG_CIFS_STATS2
239 seq_printf(m, ",STATS2");
240 #else
241 seq_printf(m, ",STATS");
242 #endif
243 #ifdef CONFIG_CIFS_DEBUG2
244 seq_printf(m, ",DEBUG2");
245 #elif defined(CONFIG_CIFS_DEBUG)
246 seq_printf(m, ",DEBUG");
247 #endif
248 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
249 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
250 #endif
251 #ifdef CONFIG_CIFS_POSIX
252 seq_printf(m, ",CIFS_POSIX");
253 #endif
254 #ifdef CONFIG_CIFS_UPCALL
255 seq_printf(m, ",UPCALL(SPNEGO)");
256 #endif
257 #ifdef CONFIG_CIFS_XATTR
258 seq_printf(m, ",XATTR");
259 #endif
260 seq_printf(m, ",ACL");
261 #ifdef CONFIG_CIFS_SWN_UPCALL
262 seq_puts(m, ",WITNESS");
263 #endif
264 seq_putc(m, '\n');
265 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
266 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
267
268 seq_printf(m, "\nServers: ");
269
270 c = 0;
271 spin_lock(&cifs_tcp_ses_lock);
272 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
273 /* channel info will be printed as a part of sessions below */
274 if (CIFS_SERVER_IS_CHAN(server))
275 continue;
276
277 c++;
278 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
279 c, server->conn_id);
280
281 if (server->hostname)
282 seq_printf(m, "Hostname: %s ", server->hostname);
283 #ifdef CONFIG_CIFS_SMB_DIRECT
284 if (!server->rdma)
285 goto skip_rdma;
286
287 if (!server->smbd_conn) {
288 seq_printf(m, "\nSMBDirect transport not available");
289 goto skip_rdma;
290 }
291
292 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
293 "transport status: %x",
294 server->smbd_conn->protocol,
295 server->smbd_conn->transport_status);
296 seq_printf(m, "\nConn receive_credit_max: %x "
297 "send_credit_target: %x max_send_size: %x",
298 server->smbd_conn->receive_credit_max,
299 server->smbd_conn->send_credit_target,
300 server->smbd_conn->max_send_size);
301 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
302 "max_fragmented_send_size: %x max_receive_size:%x",
303 server->smbd_conn->max_fragmented_recv_size,
304 server->smbd_conn->max_fragmented_send_size,
305 server->smbd_conn->max_receive_size);
306 seq_printf(m, "\nConn keep_alive_interval: %x "
307 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
308 server->smbd_conn->keep_alive_interval,
309 server->smbd_conn->max_readwrite_size,
310 server->smbd_conn->rdma_readwrite_threshold);
311 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
312 "count_put_receive_buffer: %x count_send_empty: %x",
313 server->smbd_conn->count_get_receive_buffer,
314 server->smbd_conn->count_put_receive_buffer,
315 server->smbd_conn->count_send_empty);
316 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
317 "count_enqueue_reassembly_queue: %x "
318 "count_dequeue_reassembly_queue: %x "
319 "fragment_reassembly_remaining: %x "
320 "reassembly_data_length: %x "
321 "reassembly_queue_length: %x",
322 server->smbd_conn->count_reassembly_queue,
323 server->smbd_conn->count_enqueue_reassembly_queue,
324 server->smbd_conn->count_dequeue_reassembly_queue,
325 server->smbd_conn->fragment_reassembly_remaining,
326 server->smbd_conn->reassembly_data_length,
327 server->smbd_conn->reassembly_queue_length);
328 seq_printf(m, "\nCurrent Credits send_credits: %x "
329 "receive_credits: %x receive_credit_target: %x",
330 atomic_read(&server->smbd_conn->send_credits),
331 atomic_read(&server->smbd_conn->receive_credits),
332 server->smbd_conn->receive_credit_target);
333 seq_printf(m, "\nPending send_pending: %x ",
334 atomic_read(&server->smbd_conn->send_pending));
335 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
336 "count_empty_packet_queue: %x",
337 server->smbd_conn->count_receive_queue,
338 server->smbd_conn->count_empty_packet_queue);
339 seq_printf(m, "\nMR responder_resources: %x "
340 "max_frmr_depth: %x mr_type: %x",
341 server->smbd_conn->responder_resources,
342 server->smbd_conn->max_frmr_depth,
343 server->smbd_conn->mr_type);
344 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
345 atomic_read(&server->smbd_conn->mr_ready_count),
346 atomic_read(&server->smbd_conn->mr_used_count));
347 skip_rdma:
348 #endif
349 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
350 server->credits, server->dialect);
351 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
352 seq_printf(m, " COMPRESS_LZNT1");
353 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
354 seq_printf(m, " COMPRESS_LZ77");
355 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
356 seq_printf(m, " COMPRESS_LZ77_HUFF");
357 if (server->sign)
358 seq_printf(m, " signed");
359 if (server->posix_ext_supported)
360 seq_printf(m, " posix");
361 if (server->nosharesock)
362 seq_printf(m, " nosharesock");
363
364 if (server->rdma)
365 seq_printf(m, "\nRDMA ");
366 seq_printf(m, "\nTCP status: %d Instance: %d"
367 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
368 server->tcpStatus,
369 server->reconnect_instance,
370 server->srv_count,
371 server->sec_mode, in_flight(server));
372
373 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
374 atomic_read(&server->in_send),
375 atomic_read(&server->num_waiters));
376 if (IS_ENABLED(CONFIG_CIFS_DFS_UPCALL)) {
377 if (server->origin_fullpath)
378 seq_printf(m, "\nDFS origin full path: %s",
379 server->origin_fullpath);
380 if (server->leaf_fullpath)
381 seq_printf(m, "\nDFS leaf full path: %s",
382 server->leaf_fullpath);
383 }
384
385 seq_printf(m, "\n\n\tSessions: ");
386 i = 0;
387 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
388 i++;
389 if ((ses->serverDomain == NULL) ||
390 (ses->serverOS == NULL) ||
391 (ses->serverNOS == NULL)) {
392 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
393 i, ses->ip_addr, ses->ses_count,
394 ses->capabilities, ses->ses_status);
395 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
396 seq_printf(m, "Guest ");
397 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
398 seq_printf(m, "Anonymous ");
399 } else {
400 seq_printf(m,
401 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
402 "\n\tNOS: %s\tCapability: 0x%x"
403 "\n\tSMB session status: %d ",
404 i, ses->ip_addr, ses->serverDomain,
405 ses->ses_count, ses->serverOS, ses->serverNOS,
406 ses->capabilities, ses->ses_status);
407 }
408
409 seq_printf(m, "\n\tSecurity type: %s ",
410 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
411
412 /* dump session id helpful for use with network trace */
413 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
414 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
415 seq_puts(m, " encrypted");
416 if (ses->sign)
417 seq_puts(m, " signed");
418
419 seq_printf(m, "\n\tUser: %d Cred User: %d",
420 from_kuid(&init_user_ns, ses->linux_uid),
421 from_kuid(&init_user_ns, ses->cred_uid));
422
423 spin_lock(&ses->chan_lock);
424 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
425 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
426 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
427 seq_puts(m, "\t[RECONNECTING] ");
428
429 if (ses->chan_count > 1) {
430 seq_printf(m, "\n\n\tExtra Channels: %zu ",
431 ses->chan_count-1);
432 for (j = 1; j < ses->chan_count; j++) {
433 cifs_dump_channel(m, j, &ses->chans[j]);
434 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
435 seq_puts(m, "\tDISCONNECTED ");
436 if (CIFS_CHAN_IN_RECONNECT(ses, j))
437 seq_puts(m, "\t[RECONNECTING] ");
438 }
439 }
440 spin_unlock(&ses->chan_lock);
441
442 seq_puts(m, "\n\n\tShares: ");
443 j = 0;
444
445 seq_printf(m, "\n\t%d) IPC: ", j);
446 if (ses->tcon_ipc)
447 cifs_debug_tcon(m, ses->tcon_ipc);
448 else
449 seq_puts(m, "none\n");
450
451 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
452 ++j;
453 seq_printf(m, "\n\t%d) ", j);
454 cifs_debug_tcon(m, tcon);
455 }
456
457 spin_lock(&ses->iface_lock);
458 if (ses->iface_count)
459 seq_printf(m, "\n\n\tServer interfaces: %zu"
460 "\tLast updated: %lu seconds ago",
461 ses->iface_count,
462 (jiffies - ses->iface_last_update) / HZ);
463 j = 0;
464 list_for_each_entry(iface, &ses->iface_list,
465 iface_head) {
466 seq_printf(m, "\n\t%d)", ++j);
467 cifs_dump_iface(m, iface);
468 if (is_ses_using_iface(ses, iface))
469 seq_puts(m, "\t\t[CONNECTED]\n");
470 }
471 spin_unlock(&ses->iface_lock);
472 }
473 if (i == 0)
474 seq_printf(m, "\n\t\t[NONE]");
475
476 seq_puts(m, "\n\n\tMIDs: ");
477 spin_lock(&server->mid_lock);
478 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
479 seq_printf(m, "\n\tState: %d com: %d pid:"
480 " %d cbdata: %p mid %llu\n",
481 mid_entry->mid_state,
482 le16_to_cpu(mid_entry->command),
483 mid_entry->pid,
484 mid_entry->callback_data,
485 mid_entry->mid);
486 }
487 spin_unlock(&server->mid_lock);
488 seq_printf(m, "\n--\n");
489 }
490 if (c == 0)
491 seq_printf(m, "\n\t[NONE]");
492
493 spin_unlock(&cifs_tcp_ses_lock);
494 seq_putc(m, '\n');
495 cifs_swn_dump(m);
496
497 /* BB add code to dump additional info such as TCP session info now */
498 return 0;
499 }
500
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)501 static ssize_t cifs_stats_proc_write(struct file *file,
502 const char __user *buffer, size_t count, loff_t *ppos)
503 {
504 bool bv;
505 int rc;
506 struct TCP_Server_Info *server;
507 struct cifs_ses *ses;
508 struct cifs_tcon *tcon;
509
510 rc = kstrtobool_from_user(buffer, count, &bv);
511 if (rc == 0) {
512 #ifdef CONFIG_CIFS_STATS2
513 int i;
514
515 atomic_set(&total_buf_alloc_count, 0);
516 atomic_set(&total_small_buf_alloc_count, 0);
517 #endif /* CONFIG_CIFS_STATS2 */
518 atomic_set(&tcpSesReconnectCount, 0);
519 atomic_set(&tconInfoReconnectCount, 0);
520
521 spin_lock(&GlobalMid_Lock);
522 GlobalMaxActiveXid = 0;
523 GlobalCurrentXid = 0;
524 spin_unlock(&GlobalMid_Lock);
525 spin_lock(&cifs_tcp_ses_lock);
526 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
527 server->max_in_flight = 0;
528 #ifdef CONFIG_CIFS_STATS2
529 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
530 atomic_set(&server->num_cmds[i], 0);
531 atomic_set(&server->smb2slowcmd[i], 0);
532 server->time_per_cmd[i] = 0;
533 server->slowest_cmd[i] = 0;
534 server->fastest_cmd[0] = 0;
535 }
536 #endif /* CONFIG_CIFS_STATS2 */
537 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
538 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
539 atomic_set(&tcon->num_smbs_sent, 0);
540 spin_lock(&tcon->stat_lock);
541 tcon->bytes_read = 0;
542 tcon->bytes_written = 0;
543 spin_unlock(&tcon->stat_lock);
544 if (server->ops->clear_stats)
545 server->ops->clear_stats(tcon);
546 }
547 }
548 }
549 spin_unlock(&cifs_tcp_ses_lock);
550 } else {
551 return rc;
552 }
553
554 return count;
555 }
556
cifs_stats_proc_show(struct seq_file * m,void * v)557 static int cifs_stats_proc_show(struct seq_file *m, void *v)
558 {
559 int i;
560 #ifdef CONFIG_CIFS_STATS2
561 int j;
562 #endif /* STATS2 */
563 struct TCP_Server_Info *server;
564 struct cifs_ses *ses;
565 struct cifs_tcon *tcon;
566
567 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
568 sesInfoAllocCount.counter);
569 seq_printf(m, "Share (unique mount targets): %d\n",
570 tconInfoAllocCount.counter);
571 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
572 buf_alloc_count.counter,
573 cifs_min_rcv + tcpSesAllocCount.counter);
574 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
575 small_buf_alloc_count.counter, cifs_min_small);
576 #ifdef CONFIG_CIFS_STATS2
577 seq_printf(m, "Total Large %d Small %d Allocations\n",
578 atomic_read(&total_buf_alloc_count),
579 atomic_read(&total_small_buf_alloc_count));
580 #endif /* CONFIG_CIFS_STATS2 */
581
582 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
583 seq_printf(m,
584 "\n%d session %d share reconnects\n",
585 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
586
587 seq_printf(m,
588 "Total vfs operations: %d maximum at one time: %d\n",
589 GlobalCurrentXid, GlobalMaxActiveXid);
590
591 i = 0;
592 spin_lock(&cifs_tcp_ses_lock);
593 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
594 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
595 #ifdef CONFIG_CIFS_STATS2
596 seq_puts(m, "\nTotal time spent processing by command. Time ");
597 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
598 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
599 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
600 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
601 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
602 atomic_read(&server->num_cmds[j]),
603 server->time_per_cmd[j],
604 server->fastest_cmd[j],
605 server->slowest_cmd[j]);
606 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
607 if (atomic_read(&server->smb2slowcmd[j]))
608 seq_printf(m, " %d slow responses from %s for command %d\n",
609 atomic_read(&server->smb2slowcmd[j]),
610 server->hostname, j);
611 #endif /* STATS2 */
612 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
613 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
614 i++;
615 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
616 if (tcon->need_reconnect)
617 seq_puts(m, "\tDISCONNECTED ");
618 seq_printf(m, "\nSMBs: %d",
619 atomic_read(&tcon->num_smbs_sent));
620 if (server->ops->print_stats)
621 server->ops->print_stats(m, tcon);
622 }
623 }
624 }
625 spin_unlock(&cifs_tcp_ses_lock);
626
627 seq_putc(m, '\n');
628 return 0;
629 }
630
cifs_stats_proc_open(struct inode * inode,struct file * file)631 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
632 {
633 return single_open(file, cifs_stats_proc_show, NULL);
634 }
635
636 static const struct proc_ops cifs_stats_proc_ops = {
637 .proc_open = cifs_stats_proc_open,
638 .proc_read = seq_read,
639 .proc_lseek = seq_lseek,
640 .proc_release = single_release,
641 .proc_write = cifs_stats_proc_write,
642 };
643
644 #ifdef CONFIG_CIFS_SMB_DIRECT
645 #define PROC_FILE_DEFINE(name) \
646 static ssize_t name##_write(struct file *file, const char __user *buffer, \
647 size_t count, loff_t *ppos) \
648 { \
649 int rc; \
650 rc = kstrtoint_from_user(buffer, count, 10, & name); \
651 if (rc) \
652 return rc; \
653 return count; \
654 } \
655 static int name##_proc_show(struct seq_file *m, void *v) \
656 { \
657 seq_printf(m, "%d\n", name ); \
658 return 0; \
659 } \
660 static int name##_open(struct inode *inode, struct file *file) \
661 { \
662 return single_open(file, name##_proc_show, NULL); \
663 } \
664 \
665 static const struct proc_ops cifs_##name##_proc_fops = { \
666 .proc_open = name##_open, \
667 .proc_read = seq_read, \
668 .proc_lseek = seq_lseek, \
669 .proc_release = single_release, \
670 .proc_write = name##_write, \
671 }
672
673 PROC_FILE_DEFINE(rdma_readwrite_threshold);
674 PROC_FILE_DEFINE(smbd_max_frmr_depth);
675 PROC_FILE_DEFINE(smbd_keep_alive_interval);
676 PROC_FILE_DEFINE(smbd_max_receive_size);
677 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
678 PROC_FILE_DEFINE(smbd_max_send_size);
679 PROC_FILE_DEFINE(smbd_send_credit_target);
680 PROC_FILE_DEFINE(smbd_receive_credit_max);
681 #endif
682
683 static struct proc_dir_entry *proc_fs_cifs;
684 static const struct proc_ops cifsFYI_proc_ops;
685 static const struct proc_ops cifs_lookup_cache_proc_ops;
686 static const struct proc_ops traceSMB_proc_ops;
687 static const struct proc_ops cifs_security_flags_proc_ops;
688 static const struct proc_ops cifs_linux_ext_proc_ops;
689 static const struct proc_ops cifs_mount_params_proc_ops;
690
691 void
cifs_proc_init(void)692 cifs_proc_init(void)
693 {
694 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
695 if (proc_fs_cifs == NULL)
696 return;
697
698 proc_create_single("DebugData", 0, proc_fs_cifs,
699 cifs_debug_data_proc_show);
700
701 proc_create_single("open_files", 0400, proc_fs_cifs,
702 cifs_debug_files_proc_show);
703
704 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
705 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
706 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
707 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
708 &cifs_linux_ext_proc_ops);
709 proc_create("SecurityFlags", 0644, proc_fs_cifs,
710 &cifs_security_flags_proc_ops);
711 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
712 &cifs_lookup_cache_proc_ops);
713
714 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
715
716 #ifdef CONFIG_CIFS_DFS_UPCALL
717 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
718 #endif
719
720 #ifdef CONFIG_CIFS_SMB_DIRECT
721 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
722 &cifs_rdma_readwrite_threshold_proc_fops);
723 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
724 &cifs_smbd_max_frmr_depth_proc_fops);
725 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
726 &cifs_smbd_keep_alive_interval_proc_fops);
727 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
728 &cifs_smbd_max_receive_size_proc_fops);
729 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
730 &cifs_smbd_max_fragmented_recv_size_proc_fops);
731 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
732 &cifs_smbd_max_send_size_proc_fops);
733 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
734 &cifs_smbd_send_credit_target_proc_fops);
735 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
736 &cifs_smbd_receive_credit_max_proc_fops);
737 #endif
738 }
739
740 void
cifs_proc_clean(void)741 cifs_proc_clean(void)
742 {
743 if (proc_fs_cifs == NULL)
744 return;
745
746 remove_proc_entry("DebugData", proc_fs_cifs);
747 remove_proc_entry("open_files", proc_fs_cifs);
748 remove_proc_entry("cifsFYI", proc_fs_cifs);
749 remove_proc_entry("traceSMB", proc_fs_cifs);
750 remove_proc_entry("Stats", proc_fs_cifs);
751 remove_proc_entry("SecurityFlags", proc_fs_cifs);
752 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
753 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
754 remove_proc_entry("mount_params", proc_fs_cifs);
755
756 #ifdef CONFIG_CIFS_DFS_UPCALL
757 remove_proc_entry("dfscache", proc_fs_cifs);
758 #endif
759 #ifdef CONFIG_CIFS_SMB_DIRECT
760 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
761 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
762 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
763 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
764 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
765 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
766 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
767 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
768 #endif
769 remove_proc_entry("fs/cifs", NULL);
770 }
771
cifsFYI_proc_show(struct seq_file * m,void * v)772 static int cifsFYI_proc_show(struct seq_file *m, void *v)
773 {
774 seq_printf(m, "%d\n", cifsFYI);
775 return 0;
776 }
777
cifsFYI_proc_open(struct inode * inode,struct file * file)778 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
779 {
780 return single_open(file, cifsFYI_proc_show, NULL);
781 }
782
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)783 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
784 size_t count, loff_t *ppos)
785 {
786 char c[2] = { '\0' };
787 bool bv;
788 int rc;
789
790 rc = get_user(c[0], buffer);
791 if (rc)
792 return rc;
793 if (kstrtobool(c, &bv) == 0)
794 cifsFYI = bv;
795 else if ((c[0] > '1') && (c[0] <= '9'))
796 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
797 else
798 return -EINVAL;
799
800 return count;
801 }
802
803 static const struct proc_ops cifsFYI_proc_ops = {
804 .proc_open = cifsFYI_proc_open,
805 .proc_read = seq_read,
806 .proc_lseek = seq_lseek,
807 .proc_release = single_release,
808 .proc_write = cifsFYI_proc_write,
809 };
810
cifs_linux_ext_proc_show(struct seq_file * m,void * v)811 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
812 {
813 seq_printf(m, "%d\n", linuxExtEnabled);
814 return 0;
815 }
816
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)817 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
818 {
819 return single_open(file, cifs_linux_ext_proc_show, NULL);
820 }
821
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)822 static ssize_t cifs_linux_ext_proc_write(struct file *file,
823 const char __user *buffer, size_t count, loff_t *ppos)
824 {
825 int rc;
826
827 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
828 if (rc)
829 return rc;
830
831 return count;
832 }
833
834 static const struct proc_ops cifs_linux_ext_proc_ops = {
835 .proc_open = cifs_linux_ext_proc_open,
836 .proc_read = seq_read,
837 .proc_lseek = seq_lseek,
838 .proc_release = single_release,
839 .proc_write = cifs_linux_ext_proc_write,
840 };
841
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)842 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
843 {
844 seq_printf(m, "%d\n", lookupCacheEnabled);
845 return 0;
846 }
847
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)848 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
849 {
850 return single_open(file, cifs_lookup_cache_proc_show, NULL);
851 }
852
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)853 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
854 const char __user *buffer, size_t count, loff_t *ppos)
855 {
856 int rc;
857
858 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
859 if (rc)
860 return rc;
861
862 return count;
863 }
864
865 static const struct proc_ops cifs_lookup_cache_proc_ops = {
866 .proc_open = cifs_lookup_cache_proc_open,
867 .proc_read = seq_read,
868 .proc_lseek = seq_lseek,
869 .proc_release = single_release,
870 .proc_write = cifs_lookup_cache_proc_write,
871 };
872
traceSMB_proc_show(struct seq_file * m,void * v)873 static int traceSMB_proc_show(struct seq_file *m, void *v)
874 {
875 seq_printf(m, "%d\n", traceSMB);
876 return 0;
877 }
878
traceSMB_proc_open(struct inode * inode,struct file * file)879 static int traceSMB_proc_open(struct inode *inode, struct file *file)
880 {
881 return single_open(file, traceSMB_proc_show, NULL);
882 }
883
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)884 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
885 size_t count, loff_t *ppos)
886 {
887 int rc;
888
889 rc = kstrtobool_from_user(buffer, count, &traceSMB);
890 if (rc)
891 return rc;
892
893 return count;
894 }
895
896 static const struct proc_ops traceSMB_proc_ops = {
897 .proc_open = traceSMB_proc_open,
898 .proc_read = seq_read,
899 .proc_lseek = seq_lseek,
900 .proc_release = single_release,
901 .proc_write = traceSMB_proc_write,
902 };
903
cifs_security_flags_proc_show(struct seq_file * m,void * v)904 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
905 {
906 seq_printf(m, "0x%x\n", global_secflags);
907 return 0;
908 }
909
cifs_security_flags_proc_open(struct inode * inode,struct file * file)910 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
911 {
912 return single_open(file, cifs_security_flags_proc_show, NULL);
913 }
914
915 /*
916 * Ensure that if someone sets a MUST flag, that we disable all other MAY
917 * flags except for the ones corresponding to the given MUST flag. If there are
918 * multiple MUST flags, then try to prefer more secure ones.
919 */
920 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)921 cifs_security_flags_handle_must_flags(unsigned int *flags)
922 {
923 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
924
925 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
926 *flags = CIFSSEC_MUST_KRB5;
927 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
928 *flags = CIFSSEC_MUST_NTLMSSP;
929 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
930 *flags = CIFSSEC_MUST_NTLMV2;
931
932 *flags |= signflags;
933 }
934
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)935 static ssize_t cifs_security_flags_proc_write(struct file *file,
936 const char __user *buffer, size_t count, loff_t *ppos)
937 {
938 int rc;
939 unsigned int flags;
940 char flags_string[12];
941 bool bv;
942
943 if ((count < 1) || (count > 11))
944 return -EINVAL;
945
946 memset(flags_string, 0, 12);
947
948 if (copy_from_user(flags_string, buffer, count))
949 return -EFAULT;
950
951 if (count < 3) {
952 /* single char or single char followed by null */
953 if (kstrtobool(flags_string, &bv) == 0) {
954 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
955 return count;
956 } else if (!isdigit(flags_string[0])) {
957 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
958 flags_string);
959 return -EINVAL;
960 }
961 }
962
963 /* else we have a number */
964 rc = kstrtouint(flags_string, 0, &flags);
965 if (rc) {
966 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
967 flags_string);
968 return rc;
969 }
970
971 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
972
973 if (flags == 0) {
974 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
975 return -EINVAL;
976 }
977
978 if (flags & ~CIFSSEC_MASK) {
979 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
980 flags & ~CIFSSEC_MASK);
981 return -EINVAL;
982 }
983
984 cifs_security_flags_handle_must_flags(&flags);
985
986 /* flags look ok - update the global security flags for cifs module */
987 global_secflags = flags;
988 if (global_secflags & CIFSSEC_MUST_SIGN) {
989 /* requiring signing implies signing is allowed */
990 global_secflags |= CIFSSEC_MAY_SIGN;
991 cifs_dbg(FYI, "packet signing now required\n");
992 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
993 cifs_dbg(FYI, "packet signing disabled\n");
994 }
995 /* BB should we turn on MAY flags for other MUST options? */
996 return count;
997 }
998
999 static const struct proc_ops cifs_security_flags_proc_ops = {
1000 .proc_open = cifs_security_flags_proc_open,
1001 .proc_read = seq_read,
1002 .proc_lseek = seq_lseek,
1003 .proc_release = single_release,
1004 .proc_write = cifs_security_flags_proc_write,
1005 };
1006
1007 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file * m,void * v)1008 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1009 {
1010 const struct fs_parameter_spec *p;
1011 const char *type;
1012
1013 for (p = smb3_fs_parameters; p->name; p++) {
1014 /* cannot use switch with pointers... */
1015 if (!p->type) {
1016 if (p->flags == fs_param_neg_with_no)
1017 type = "noflag";
1018 else
1019 type = "flag";
1020 } else if (p->type == fs_param_is_bool)
1021 type = "bool";
1022 else if (p->type == fs_param_is_u32)
1023 type = "u32";
1024 else if (p->type == fs_param_is_u64)
1025 type = "u64";
1026 else if (p->type == fs_param_is_string)
1027 type = "string";
1028 else
1029 type = "unknown";
1030
1031 seq_printf(m, "%s:%s\n", p->name, type);
1032 }
1033
1034 return 0;
1035 }
1036
cifs_mount_params_proc_open(struct inode * inode,struct file * file)1037 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1038 {
1039 return single_open(file, cifs_mount_params_proc_show, NULL);
1040 }
1041
1042 static const struct proc_ops cifs_mount_params_proc_ops = {
1043 .proc_open = cifs_mount_params_proc_open,
1044 .proc_read = seq_read,
1045 .proc_lseek = seq_lseek,
1046 .proc_release = single_release,
1047 /* No need for write for now */
1048 /* .proc_write = cifs_mount_params_proc_write, */
1049 };
1050
1051 #else
cifs_proc_init(void)1052 inline void cifs_proc_init(void)
1053 {
1054 }
1055
cifs_proc_clean(void)1056 inline void cifs_proc_clean(void)
1057 {
1058 }
1059 #endif /* PROC_FS */
1060