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\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));
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(&server->mid_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(&server->mid_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->tree_name, tcon->tc_count);
91 if (tcon->nativeFileSystem)
92 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
93 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
94 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
95 le32_to_cpu(tcon->fsAttrInfo.Attributes),
96 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
97 tcon->status);
98 if (dev_type == FILE_DEVICE_DISK)
99 seq_puts(m, " type: DISK ");
100 else if (dev_type == FILE_DEVICE_CD_ROM)
101 seq_puts(m, " type: CDROM ");
102 else
103 seq_printf(m, " type: %d ", dev_type);
104
105 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
106
107 if ((tcon->seal) ||
108 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
109 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
110 seq_printf(m, " Encrypted");
111 if (tcon->nocase)
112 seq_printf(m, " nocase");
113 if (tcon->unix_ext)
114 seq_printf(m, " POSIX Extensions");
115 if (tcon->ses->server->ops->dump_share_caps)
116 tcon->ses->server->ops->dump_share_caps(m, tcon);
117 if (tcon->use_witness)
118 seq_puts(m, " Witness");
119 if (tcon->broken_sparse_sup)
120 seq_puts(m, " nosparse");
121 if (tcon->need_reconnect)
122 seq_puts(m, "\tDISCONNECTED ");
123 seq_putc(m, '\n');
124 }
125
126 static void
cifs_dump_channel(struct seq_file * m,int i,struct cifs_chan * chan)127 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
128 {
129 struct TCP_Server_Info *server = chan->server;
130
131 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
132 "\n\t\tNumber of credits: %d Dialect 0x%x"
133 "\n\t\tTCP status: %d Instance: %d"
134 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
135 "\n\t\tIn Send: %d In MaxReq Wait: %d",
136 i+1, server->conn_id,
137 server->credits,
138 server->dialect,
139 server->tcpStatus,
140 server->reconnect_instance,
141 server->srv_count,
142 server->sec_mode,
143 in_flight(server),
144 atomic_read(&server->in_send),
145 atomic_read(&server->num_waiters));
146 }
147
148 static void
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)149 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
150 {
151 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
152 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
153
154 seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
155 seq_puts(m, "\t\tCapabilities: ");
156 if (iface->rdma_capable)
157 seq_puts(m, "rdma ");
158 if (iface->rss_capable)
159 seq_puts(m, "rss ");
160 seq_putc(m, '\n');
161 if (iface->sockaddr.ss_family == AF_INET)
162 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
163 else if (iface->sockaddr.ss_family == AF_INET6)
164 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
165 if (!iface->is_active)
166 seq_puts(m, "\t\t[for-cleanup]\n");
167 }
168
cifs_debug_files_proc_show(struct seq_file * m,void * v)169 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
170 {
171 struct TCP_Server_Info *server;
172 struct cifs_ses *ses;
173 struct cifs_tcon *tcon;
174 struct cifsFileInfo *cfile;
175
176 seq_puts(m, "# Version:1\n");
177 seq_puts(m, "# Format:\n");
178 seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
179 #ifdef CONFIG_CIFS_DEBUG2
180 seq_printf(m, " <filename> <mid>\n");
181 #else
182 seq_printf(m, " <filename>\n");
183 #endif /* CIFS_DEBUG2 */
184 spin_lock(&cifs_tcp_ses_lock);
185 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
186 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
187 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
188 spin_lock(&tcon->open_file_lock);
189 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
190 seq_printf(m,
191 "0x%x 0x%llx 0x%x %d %d %d %pd",
192 tcon->tid,
193 cfile->fid.persistent_fid,
194 cfile->f_flags,
195 cfile->count,
196 cfile->pid,
197 from_kuid(&init_user_ns, cfile->uid),
198 cfile->dentry);
199 #ifdef CONFIG_CIFS_DEBUG2
200 seq_printf(m, " %llu\n", cfile->fid.mid);
201 #else
202 seq_printf(m, "\n");
203 #endif /* CIFS_DEBUG2 */
204 }
205 spin_unlock(&tcon->open_file_lock);
206 }
207 }
208 }
209 spin_unlock(&cifs_tcp_ses_lock);
210 seq_putc(m, '\n');
211 return 0;
212 }
213
cifs_debug_data_proc_show(struct seq_file * m,void * v)214 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
215 {
216 struct mid_q_entry *mid_entry;
217 struct TCP_Server_Info *server;
218 struct cifs_ses *ses;
219 struct cifs_tcon *tcon;
220 struct cifs_server_iface *iface;
221 int c, i, j;
222
223 seq_puts(m,
224 "Display Internal CIFS Data Structures for Debugging\n"
225 "---------------------------------------------------\n");
226 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
227 seq_printf(m, "Features:");
228 #ifdef CONFIG_CIFS_DFS_UPCALL
229 seq_printf(m, " DFS");
230 #endif
231 #ifdef CONFIG_CIFS_FSCACHE
232 seq_printf(m, ",FSCACHE");
233 #endif
234 #ifdef CONFIG_CIFS_SMB_DIRECT
235 seq_printf(m, ",SMB_DIRECT");
236 #endif
237 #ifdef CONFIG_CIFS_STATS2
238 seq_printf(m, ",STATS2");
239 #else
240 seq_printf(m, ",STATS");
241 #endif
242 #ifdef CONFIG_CIFS_DEBUG2
243 seq_printf(m, ",DEBUG2");
244 #elif defined(CONFIG_CIFS_DEBUG)
245 seq_printf(m, ",DEBUG");
246 #endif
247 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
248 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
249 #endif
250 #ifdef CONFIG_CIFS_POSIX
251 seq_printf(m, ",CIFS_POSIX");
252 #endif
253 #ifdef CONFIG_CIFS_UPCALL
254 seq_printf(m, ",UPCALL(SPNEGO)");
255 #endif
256 #ifdef CONFIG_CIFS_XATTR
257 seq_printf(m, ",XATTR");
258 #endif
259 seq_printf(m, ",ACL");
260 #ifdef CONFIG_CIFS_SWN_UPCALL
261 seq_puts(m, ",WITNESS");
262 #endif
263 seq_putc(m, '\n');
264 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
265 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
266
267 seq_printf(m, "\nServers: ");
268
269 c = 0;
270 spin_lock(&cifs_tcp_ses_lock);
271 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
272 /* channel info will be printed as a part of sessions below */
273 if (CIFS_SERVER_IS_CHAN(server))
274 continue;
275
276 c++;
277 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
278 c, server->conn_id);
279
280 if (server->hostname)
281 seq_printf(m, "Hostname: %s ", server->hostname);
282 #ifdef CONFIG_CIFS_SMB_DIRECT
283 if (!server->rdma)
284 goto skip_rdma;
285
286 if (!server->smbd_conn) {
287 seq_printf(m, "\nSMBDirect transport not available");
288 goto skip_rdma;
289 }
290
291 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
292 "transport status: %x",
293 server->smbd_conn->protocol,
294 server->smbd_conn->transport_status);
295 seq_printf(m, "\nConn receive_credit_max: %x "
296 "send_credit_target: %x max_send_size: %x",
297 server->smbd_conn->receive_credit_max,
298 server->smbd_conn->send_credit_target,
299 server->smbd_conn->max_send_size);
300 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
301 "max_fragmented_send_size: %x max_receive_size:%x",
302 server->smbd_conn->max_fragmented_recv_size,
303 server->smbd_conn->max_fragmented_send_size,
304 server->smbd_conn->max_receive_size);
305 seq_printf(m, "\nConn keep_alive_interval: %x "
306 "max_readwrite_size: %x rdma_readwrite_threshold: %x",
307 server->smbd_conn->keep_alive_interval,
308 server->smbd_conn->max_readwrite_size,
309 server->smbd_conn->rdma_readwrite_threshold);
310 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
311 "count_put_receive_buffer: %x count_send_empty: %x",
312 server->smbd_conn->count_get_receive_buffer,
313 server->smbd_conn->count_put_receive_buffer,
314 server->smbd_conn->count_send_empty);
315 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
316 "count_enqueue_reassembly_queue: %x "
317 "count_dequeue_reassembly_queue: %x "
318 "fragment_reassembly_remaining: %x "
319 "reassembly_data_length: %x "
320 "reassembly_queue_length: %x",
321 server->smbd_conn->count_reassembly_queue,
322 server->smbd_conn->count_enqueue_reassembly_queue,
323 server->smbd_conn->count_dequeue_reassembly_queue,
324 server->smbd_conn->fragment_reassembly_remaining,
325 server->smbd_conn->reassembly_data_length,
326 server->smbd_conn->reassembly_queue_length);
327 seq_printf(m, "\nCurrent Credits send_credits: %x "
328 "receive_credits: %x receive_credit_target: %x",
329 atomic_read(&server->smbd_conn->send_credits),
330 atomic_read(&server->smbd_conn->receive_credits),
331 server->smbd_conn->receive_credit_target);
332 seq_printf(m, "\nPending send_pending: %x ",
333 atomic_read(&server->smbd_conn->send_pending));
334 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
335 "count_empty_packet_queue: %x",
336 server->smbd_conn->count_receive_queue,
337 server->smbd_conn->count_empty_packet_queue);
338 seq_printf(m, "\nMR responder_resources: %x "
339 "max_frmr_depth: %x mr_type: %x",
340 server->smbd_conn->responder_resources,
341 server->smbd_conn->max_frmr_depth,
342 server->smbd_conn->mr_type);
343 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
344 atomic_read(&server->smbd_conn->mr_ready_count),
345 atomic_read(&server->smbd_conn->mr_used_count));
346 skip_rdma:
347 #endif
348 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
349 server->credits, server->dialect);
350 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
351 seq_printf(m, " COMPRESS_LZNT1");
352 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
353 seq_printf(m, " COMPRESS_LZ77");
354 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
355 seq_printf(m, " COMPRESS_LZ77_HUFF");
356 if (server->sign)
357 seq_printf(m, " signed");
358 if (server->posix_ext_supported)
359 seq_printf(m, " posix");
360 if (server->nosharesock)
361 seq_printf(m, " nosharesock");
362
363 if (server->rdma)
364 seq_printf(m, "\nRDMA ");
365 seq_printf(m, "\nTCP status: %d Instance: %d"
366 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
367 server->tcpStatus,
368 server->reconnect_instance,
369 server->srv_count,
370 server->sec_mode, in_flight(server));
371
372 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
373 atomic_read(&server->in_send),
374 atomic_read(&server->num_waiters));
375
376 seq_printf(m, "\n\n\tSessions: ");
377 i = 0;
378 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
379 i++;
380 if ((ses->serverDomain == NULL) ||
381 (ses->serverOS == NULL) ||
382 (ses->serverNOS == NULL)) {
383 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
384 i, ses->ip_addr, ses->ses_count,
385 ses->capabilities, ses->ses_status);
386 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
387 seq_printf(m, "Guest ");
388 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
389 seq_printf(m, "Anonymous ");
390 } else {
391 seq_printf(m,
392 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
393 "\n\tNOS: %s\tCapability: 0x%x"
394 "\n\tSMB session status: %d ",
395 i, ses->ip_addr, ses->serverDomain,
396 ses->ses_count, ses->serverOS, ses->serverNOS,
397 ses->capabilities, ses->ses_status);
398 }
399
400 seq_printf(m, "\n\tSecurity type: %s ",
401 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
402
403 /* dump session id helpful for use with network trace */
404 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
405 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
406 seq_puts(m, " encrypted");
407 if (ses->sign)
408 seq_puts(m, " signed");
409
410 seq_printf(m, "\n\tUser: %d Cred User: %d",
411 from_kuid(&init_user_ns, ses->linux_uid),
412 from_kuid(&init_user_ns, ses->cred_uid));
413
414 spin_lock(&ses->chan_lock);
415 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
416 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
417 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
418 seq_puts(m, "\t[RECONNECTING] ");
419
420 if (ses->chan_count > 1) {
421 seq_printf(m, "\n\n\tExtra Channels: %zu ",
422 ses->chan_count-1);
423 for (j = 1; j < ses->chan_count; j++) {
424 cifs_dump_channel(m, j, &ses->chans[j]);
425 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
426 seq_puts(m, "\tDISCONNECTED ");
427 if (CIFS_CHAN_IN_RECONNECT(ses, j))
428 seq_puts(m, "\t[RECONNECTING] ");
429 }
430 }
431 spin_unlock(&ses->chan_lock);
432
433 seq_puts(m, "\n\n\tShares: ");
434 j = 0;
435
436 seq_printf(m, "\n\t%d) IPC: ", j);
437 if (ses->tcon_ipc)
438 cifs_debug_tcon(m, ses->tcon_ipc);
439 else
440 seq_puts(m, "none\n");
441
442 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
443 ++j;
444 seq_printf(m, "\n\t%d) ", j);
445 cifs_debug_tcon(m, tcon);
446 }
447
448 spin_lock(&ses->iface_lock);
449 if (ses->iface_count)
450 seq_printf(m, "\n\n\tServer interfaces: %zu",
451 ses->iface_count);
452 j = 0;
453 list_for_each_entry(iface, &ses->iface_list,
454 iface_head) {
455 seq_printf(m, "\n\t%d)", ++j);
456 cifs_dump_iface(m, iface);
457 if (is_ses_using_iface(ses, iface))
458 seq_puts(m, "\t\t[CONNECTED]\n");
459 }
460 spin_unlock(&ses->iface_lock);
461 }
462 if (i == 0)
463 seq_printf(m, "\n\t\t[NONE]");
464
465 seq_puts(m, "\n\n\tMIDs: ");
466 spin_lock(&server->mid_lock);
467 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
468 seq_printf(m, "\n\tState: %d com: %d pid:"
469 " %d cbdata: %p mid %llu\n",
470 mid_entry->mid_state,
471 le16_to_cpu(mid_entry->command),
472 mid_entry->pid,
473 mid_entry->callback_data,
474 mid_entry->mid);
475 }
476 spin_unlock(&server->mid_lock);
477 seq_printf(m, "\n--\n");
478 }
479 if (c == 0)
480 seq_printf(m, "\n\t[NONE]");
481
482 spin_unlock(&cifs_tcp_ses_lock);
483 seq_putc(m, '\n');
484 cifs_swn_dump(m);
485
486 /* BB add code to dump additional info such as TCP session info now */
487 return 0;
488 }
489
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)490 static ssize_t cifs_stats_proc_write(struct file *file,
491 const char __user *buffer, size_t count, loff_t *ppos)
492 {
493 bool bv;
494 int rc;
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(&total_buf_alloc_count, 0);
505 atomic_set(&total_small_buf_alloc_count, 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_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
516 server->max_in_flight = 0;
517 #ifdef CONFIG_CIFS_STATS2
518 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
519 atomic_set(&server->num_cmds[i], 0);
520 atomic_set(&server->smb2slowcmd[i], 0);
521 server->time_per_cmd[i] = 0;
522 server->slowest_cmd[i] = 0;
523 server->fastest_cmd[0] = 0;
524 }
525 #endif /* CONFIG_CIFS_STATS2 */
526 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
527 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
528 atomic_set(&tcon->num_smbs_sent, 0);
529 spin_lock(&tcon->stat_lock);
530 tcon->bytes_read = 0;
531 tcon->bytes_written = 0;
532 spin_unlock(&tcon->stat_lock);
533 if (server->ops->clear_stats)
534 server->ops->clear_stats(tcon);
535 }
536 }
537 }
538 spin_unlock(&cifs_tcp_ses_lock);
539 } else {
540 return rc;
541 }
542
543 return count;
544 }
545
cifs_stats_proc_show(struct seq_file * m,void * v)546 static int cifs_stats_proc_show(struct seq_file *m, void *v)
547 {
548 int i;
549 #ifdef CONFIG_CIFS_STATS2
550 int j;
551 #endif /* STATS2 */
552 struct TCP_Server_Info *server;
553 struct cifs_ses *ses;
554 struct cifs_tcon *tcon;
555
556 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
557 sesInfoAllocCount.counter);
558 seq_printf(m, "Share (unique mount targets): %d\n",
559 tconInfoAllocCount.counter);
560 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
561 buf_alloc_count.counter,
562 cifs_min_rcv + tcpSesAllocCount.counter);
563 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
564 small_buf_alloc_count.counter, cifs_min_small);
565 #ifdef CONFIG_CIFS_STATS2
566 seq_printf(m, "Total Large %d Small %d Allocations\n",
567 atomic_read(&total_buf_alloc_count),
568 atomic_read(&total_small_buf_alloc_count));
569 #endif /* CONFIG_CIFS_STATS2 */
570
571 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
572 seq_printf(m,
573 "\n%d session %d share reconnects\n",
574 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
575
576 seq_printf(m,
577 "Total vfs operations: %d maximum at one time: %d\n",
578 GlobalCurrentXid, GlobalMaxActiveXid);
579
580 i = 0;
581 spin_lock(&cifs_tcp_ses_lock);
582 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
583 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
584 #ifdef CONFIG_CIFS_STATS2
585 seq_puts(m, "\nTotal time spent processing by command. Time ");
586 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
587 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
588 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
589 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
590 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
591 atomic_read(&server->num_cmds[j]),
592 server->time_per_cmd[j],
593 server->fastest_cmd[j],
594 server->slowest_cmd[j]);
595 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
596 if (atomic_read(&server->smb2slowcmd[j]))
597 seq_printf(m, " %d slow responses from %s for command %d\n",
598 atomic_read(&server->smb2slowcmd[j]),
599 server->hostname, j);
600 #endif /* STATS2 */
601 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
602 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
603 i++;
604 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
605 if (tcon->need_reconnect)
606 seq_puts(m, "\tDISCONNECTED ");
607 seq_printf(m, "\nSMBs: %d",
608 atomic_read(&tcon->num_smbs_sent));
609 if (server->ops->print_stats)
610 server->ops->print_stats(m, tcon);
611 }
612 }
613 }
614 spin_unlock(&cifs_tcp_ses_lock);
615
616 seq_putc(m, '\n');
617 return 0;
618 }
619
cifs_stats_proc_open(struct inode * inode,struct file * file)620 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
621 {
622 return single_open(file, cifs_stats_proc_show, NULL);
623 }
624
625 static const struct proc_ops cifs_stats_proc_ops = {
626 .proc_open = cifs_stats_proc_open,
627 .proc_read = seq_read,
628 .proc_lseek = seq_lseek,
629 .proc_release = single_release,
630 .proc_write = cifs_stats_proc_write,
631 };
632
633 #ifdef CONFIG_CIFS_SMB_DIRECT
634 #define PROC_FILE_DEFINE(name) \
635 static ssize_t name##_write(struct file *file, const char __user *buffer, \
636 size_t count, loff_t *ppos) \
637 { \
638 int rc; \
639 rc = kstrtoint_from_user(buffer, count, 10, & name); \
640 if (rc) \
641 return rc; \
642 return count; \
643 } \
644 static int name##_proc_show(struct seq_file *m, void *v) \
645 { \
646 seq_printf(m, "%d\n", name ); \
647 return 0; \
648 } \
649 static int name##_open(struct inode *inode, struct file *file) \
650 { \
651 return single_open(file, name##_proc_show, NULL); \
652 } \
653 \
654 static const struct proc_ops cifs_##name##_proc_fops = { \
655 .proc_open = name##_open, \
656 .proc_read = seq_read, \
657 .proc_lseek = seq_lseek, \
658 .proc_release = single_release, \
659 .proc_write = name##_write, \
660 }
661
662 PROC_FILE_DEFINE(rdma_readwrite_threshold);
663 PROC_FILE_DEFINE(smbd_max_frmr_depth);
664 PROC_FILE_DEFINE(smbd_keep_alive_interval);
665 PROC_FILE_DEFINE(smbd_max_receive_size);
666 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
667 PROC_FILE_DEFINE(smbd_max_send_size);
668 PROC_FILE_DEFINE(smbd_send_credit_target);
669 PROC_FILE_DEFINE(smbd_receive_credit_max);
670 #endif
671
672 static struct proc_dir_entry *proc_fs_cifs;
673 static const struct proc_ops cifsFYI_proc_ops;
674 static const struct proc_ops cifs_lookup_cache_proc_ops;
675 static const struct proc_ops traceSMB_proc_ops;
676 static const struct proc_ops cifs_security_flags_proc_ops;
677 static const struct proc_ops cifs_linux_ext_proc_ops;
678 static const struct proc_ops cifs_mount_params_proc_ops;
679
680 void
cifs_proc_init(void)681 cifs_proc_init(void)
682 {
683 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
684 if (proc_fs_cifs == NULL)
685 return;
686
687 proc_create_single("DebugData", 0, proc_fs_cifs,
688 cifs_debug_data_proc_show);
689
690 proc_create_single("open_files", 0400, proc_fs_cifs,
691 cifs_debug_files_proc_show);
692
693 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
694 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
695 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
696 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
697 &cifs_linux_ext_proc_ops);
698 proc_create("SecurityFlags", 0644, proc_fs_cifs,
699 &cifs_security_flags_proc_ops);
700 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
701 &cifs_lookup_cache_proc_ops);
702
703 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
704
705 #ifdef CONFIG_CIFS_DFS_UPCALL
706 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
707 #endif
708
709 #ifdef CONFIG_CIFS_SMB_DIRECT
710 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
711 &cifs_rdma_readwrite_threshold_proc_fops);
712 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
713 &cifs_smbd_max_frmr_depth_proc_fops);
714 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
715 &cifs_smbd_keep_alive_interval_proc_fops);
716 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
717 &cifs_smbd_max_receive_size_proc_fops);
718 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
719 &cifs_smbd_max_fragmented_recv_size_proc_fops);
720 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
721 &cifs_smbd_max_send_size_proc_fops);
722 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
723 &cifs_smbd_send_credit_target_proc_fops);
724 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
725 &cifs_smbd_receive_credit_max_proc_fops);
726 #endif
727 }
728
729 void
cifs_proc_clean(void)730 cifs_proc_clean(void)
731 {
732 if (proc_fs_cifs == NULL)
733 return;
734
735 remove_proc_entry("DebugData", proc_fs_cifs);
736 remove_proc_entry("open_files", proc_fs_cifs);
737 remove_proc_entry("cifsFYI", proc_fs_cifs);
738 remove_proc_entry("traceSMB", proc_fs_cifs);
739 remove_proc_entry("Stats", proc_fs_cifs);
740 remove_proc_entry("SecurityFlags", proc_fs_cifs);
741 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
742 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
743 remove_proc_entry("mount_params", proc_fs_cifs);
744
745 #ifdef CONFIG_CIFS_DFS_UPCALL
746 remove_proc_entry("dfscache", proc_fs_cifs);
747 #endif
748 #ifdef CONFIG_CIFS_SMB_DIRECT
749 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
750 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
751 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
752 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
753 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
754 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
755 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
756 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
757 #endif
758 remove_proc_entry("fs/cifs", NULL);
759 }
760
cifsFYI_proc_show(struct seq_file * m,void * v)761 static int cifsFYI_proc_show(struct seq_file *m, void *v)
762 {
763 seq_printf(m, "%d\n", cifsFYI);
764 return 0;
765 }
766
cifsFYI_proc_open(struct inode * inode,struct file * file)767 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
768 {
769 return single_open(file, cifsFYI_proc_show, NULL);
770 }
771
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)772 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
773 size_t count, loff_t *ppos)
774 {
775 char c[2] = { '\0' };
776 bool bv;
777 int rc;
778
779 rc = get_user(c[0], buffer);
780 if (rc)
781 return rc;
782 if (strtobool(c, &bv) == 0)
783 cifsFYI = bv;
784 else if ((c[0] > '1') && (c[0] <= '9'))
785 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
786 else
787 return -EINVAL;
788
789 return count;
790 }
791
792 static const struct proc_ops cifsFYI_proc_ops = {
793 .proc_open = cifsFYI_proc_open,
794 .proc_read = seq_read,
795 .proc_lseek = seq_lseek,
796 .proc_release = single_release,
797 .proc_write = cifsFYI_proc_write,
798 };
799
cifs_linux_ext_proc_show(struct seq_file * m,void * v)800 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
801 {
802 seq_printf(m, "%d\n", linuxExtEnabled);
803 return 0;
804 }
805
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)806 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
807 {
808 return single_open(file, cifs_linux_ext_proc_show, NULL);
809 }
810
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)811 static ssize_t cifs_linux_ext_proc_write(struct file *file,
812 const char __user *buffer, size_t count, loff_t *ppos)
813 {
814 int rc;
815
816 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
817 if (rc)
818 return rc;
819
820 return count;
821 }
822
823 static const struct proc_ops cifs_linux_ext_proc_ops = {
824 .proc_open = cifs_linux_ext_proc_open,
825 .proc_read = seq_read,
826 .proc_lseek = seq_lseek,
827 .proc_release = single_release,
828 .proc_write = cifs_linux_ext_proc_write,
829 };
830
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)831 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
832 {
833 seq_printf(m, "%d\n", lookupCacheEnabled);
834 return 0;
835 }
836
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)837 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
838 {
839 return single_open(file, cifs_lookup_cache_proc_show, NULL);
840 }
841
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)842 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
843 const char __user *buffer, size_t count, loff_t *ppos)
844 {
845 int rc;
846
847 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
848 if (rc)
849 return rc;
850
851 return count;
852 }
853
854 static const struct proc_ops cifs_lookup_cache_proc_ops = {
855 .proc_open = cifs_lookup_cache_proc_open,
856 .proc_read = seq_read,
857 .proc_lseek = seq_lseek,
858 .proc_release = single_release,
859 .proc_write = cifs_lookup_cache_proc_write,
860 };
861
traceSMB_proc_show(struct seq_file * m,void * v)862 static int traceSMB_proc_show(struct seq_file *m, void *v)
863 {
864 seq_printf(m, "%d\n", traceSMB);
865 return 0;
866 }
867
traceSMB_proc_open(struct inode * inode,struct file * file)868 static int traceSMB_proc_open(struct inode *inode, struct file *file)
869 {
870 return single_open(file, traceSMB_proc_show, NULL);
871 }
872
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)873 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
874 size_t count, loff_t *ppos)
875 {
876 int rc;
877
878 rc = kstrtobool_from_user(buffer, count, &traceSMB);
879 if (rc)
880 return rc;
881
882 return count;
883 }
884
885 static const struct proc_ops traceSMB_proc_ops = {
886 .proc_open = traceSMB_proc_open,
887 .proc_read = seq_read,
888 .proc_lseek = seq_lseek,
889 .proc_release = single_release,
890 .proc_write = traceSMB_proc_write,
891 };
892
cifs_security_flags_proc_show(struct seq_file * m,void * v)893 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
894 {
895 seq_printf(m, "0x%x\n", global_secflags);
896 return 0;
897 }
898
cifs_security_flags_proc_open(struct inode * inode,struct file * file)899 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
900 {
901 return single_open(file, cifs_security_flags_proc_show, NULL);
902 }
903
904 /*
905 * Ensure that if someone sets a MUST flag, that we disable all other MAY
906 * flags except for the ones corresponding to the given MUST flag. If there are
907 * multiple MUST flags, then try to prefer more secure ones.
908 */
909 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)910 cifs_security_flags_handle_must_flags(unsigned int *flags)
911 {
912 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
913
914 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
915 *flags = CIFSSEC_MUST_KRB5;
916 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
917 *flags = CIFSSEC_MUST_NTLMSSP;
918 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
919 *flags = CIFSSEC_MUST_NTLMV2;
920
921 *flags |= signflags;
922 }
923
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)924 static ssize_t cifs_security_flags_proc_write(struct file *file,
925 const char __user *buffer, size_t count, loff_t *ppos)
926 {
927 int rc;
928 unsigned int flags;
929 char flags_string[12];
930 bool bv;
931
932 if ((count < 1) || (count > 11))
933 return -EINVAL;
934
935 memset(flags_string, 0, 12);
936
937 if (copy_from_user(flags_string, buffer, count))
938 return -EFAULT;
939
940 if (count < 3) {
941 /* single char or single char followed by null */
942 if (strtobool(flags_string, &bv) == 0) {
943 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
944 return count;
945 } else if (!isdigit(flags_string[0])) {
946 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
947 flags_string);
948 return -EINVAL;
949 }
950 }
951
952 /* else we have a number */
953 rc = kstrtouint(flags_string, 0, &flags);
954 if (rc) {
955 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
956 flags_string);
957 return rc;
958 }
959
960 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
961
962 if (flags == 0) {
963 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
964 return -EINVAL;
965 }
966
967 if (flags & ~CIFSSEC_MASK) {
968 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
969 flags & ~CIFSSEC_MASK);
970 return -EINVAL;
971 }
972
973 cifs_security_flags_handle_must_flags(&flags);
974
975 /* flags look ok - update the global security flags for cifs module */
976 global_secflags = flags;
977 if (global_secflags & CIFSSEC_MUST_SIGN) {
978 /* requiring signing implies signing is allowed */
979 global_secflags |= CIFSSEC_MAY_SIGN;
980 cifs_dbg(FYI, "packet signing now required\n");
981 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
982 cifs_dbg(FYI, "packet signing disabled\n");
983 }
984 /* BB should we turn on MAY flags for other MUST options? */
985 return count;
986 }
987
988 static const struct proc_ops cifs_security_flags_proc_ops = {
989 .proc_open = cifs_security_flags_proc_open,
990 .proc_read = seq_read,
991 .proc_lseek = seq_lseek,
992 .proc_release = single_release,
993 .proc_write = cifs_security_flags_proc_write,
994 };
995
996 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file * m,void * v)997 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
998 {
999 const struct fs_parameter_spec *p;
1000 const char *type;
1001
1002 for (p = smb3_fs_parameters; p->name; p++) {
1003 /* cannot use switch with pointers... */
1004 if (!p->type) {
1005 if (p->flags == fs_param_neg_with_no)
1006 type = "noflag";
1007 else
1008 type = "flag";
1009 } else if (p->type == fs_param_is_bool)
1010 type = "bool";
1011 else if (p->type == fs_param_is_u32)
1012 type = "u32";
1013 else if (p->type == fs_param_is_u64)
1014 type = "u64";
1015 else if (p->type == fs_param_is_string)
1016 type = "string";
1017 else
1018 type = "unknown";
1019
1020 seq_printf(m, "%s:%s\n", p->name, type);
1021 }
1022
1023 return 0;
1024 }
1025
cifs_mount_params_proc_open(struct inode * inode,struct file * file)1026 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1027 {
1028 return single_open(file, cifs_mount_params_proc_show, NULL);
1029 }
1030
1031 static const struct proc_ops cifs_mount_params_proc_ops = {
1032 .proc_open = cifs_mount_params_proc_open,
1033 .proc_read = seq_read,
1034 .proc_lseek = seq_lseek,
1035 .proc_release = single_release,
1036 /* No need for write for now */
1037 /* .proc_write = cifs_mount_params_proc_write, */
1038 };
1039
1040 #else
cifs_proc_init(void)1041 inline void cifs_proc_init(void)
1042 {
1043 }
1044
cifs_proc_clean(void)1045 inline void cifs_proc_clean(void)
1046 {
1047 }
1048 #endif /* PROC_FS */
1049