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 <uapi/linux/ethtool.h>
16 #include "cifspdu.h"
17 #include "cifsglob.h"
18 #include "cifsproto.h"
19 #include "cifs_debug.h"
20 #include "cifsfs.h"
21 #include "fs_context.h"
22 #ifdef CONFIG_CIFS_DFS_UPCALL
23 #include "dfs_cache.h"
24 #endif
25 #ifdef CONFIG_CIFS_SMB_DIRECT
26 #include "smbdirect.h"
27 #include "../common/smbdirect/smbdirect_pdu.h"
28 #endif
29 #include "cifs_swn.h"
30 #include "cached_dir.h"
31
32 void
cifs_dump_mem(char * label,void * data,int length)33 cifs_dump_mem(char *label, void *data, int length)
34 {
35 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
36 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
37 data, length, true);
38 }
39
cifs_dump_detail(void * buf,struct TCP_Server_Info * server)40 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
41 {
42 #ifdef CONFIG_CIFS_DEBUG2
43 struct smb_hdr *smb = buf;
44
45 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n",
46 smb->Command, smb->Status.CifsError, smb->Flags,
47 smb->Flags2, smb->Mid, smb->Pid, smb->WordCount);
48 if (!server->ops->check_message(buf, server->total_read, server)) {
49 cifs_dbg(VFS, "smb buf %p len %u\n", smb,
50 server->ops->calc_smb_size(smb));
51 }
52 #endif /* CONFIG_CIFS_DEBUG2 */
53 }
54
cifs_dump_mids(struct TCP_Server_Info * server)55 void cifs_dump_mids(struct TCP_Server_Info *server)
56 {
57 #ifdef CONFIG_CIFS_DEBUG2
58 struct mid_q_entry *mid_entry;
59
60 if (server == NULL)
61 return;
62
63 cifs_dbg(VFS, "Dump pending requests:\n");
64 spin_lock(&server->mid_queue_lock);
65 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
66 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
67 mid_entry->mid_state,
68 le16_to_cpu(mid_entry->command),
69 mid_entry->pid,
70 mid_entry->callback_data,
71 mid_entry->mid);
72 #ifdef CONFIG_CIFS_STATS2
73 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
74 mid_entry->large_buf,
75 mid_entry->resp_buf,
76 mid_entry->when_received,
77 jiffies);
78 #endif /* STATS2 */
79 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
80 mid_entry->multiRsp, mid_entry->multiEnd);
81 if (mid_entry->resp_buf) {
82 cifs_dump_detail(mid_entry->resp_buf, server);
83 cifs_dump_mem("existing buf: ",
84 mid_entry->resp_buf, 62);
85 }
86 }
87 spin_unlock(&server->mid_queue_lock);
88 #endif /* CONFIG_CIFS_DEBUG2 */
89 }
90
91 #ifdef CONFIG_PROC_FS
cifs_debug_tcon(struct seq_file * m,struct cifs_tcon * tcon)92 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
93 {
94 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
95
96 seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
97 if (tcon->nativeFileSystem)
98 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
99 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
100 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
101 le32_to_cpu(tcon->fsAttrInfo.Attributes),
102 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
103 tcon->status);
104 if (dev_type == FILE_DEVICE_DISK)
105 seq_puts(m, " type: DISK ");
106 else if (dev_type == FILE_DEVICE_CD_ROM)
107 seq_puts(m, " type: CDROM ");
108 else
109 seq_printf(m, " type: %d ", dev_type);
110
111 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
112
113 if ((tcon->seal) ||
114 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
115 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
116 seq_puts(m, " encrypted");
117 if (tcon->nocase)
118 seq_printf(m, " nocase");
119 if (tcon->unix_ext)
120 seq_printf(m, " POSIX Extensions");
121 if (tcon->ses->server->ops->dump_share_caps)
122 tcon->ses->server->ops->dump_share_caps(m, tcon);
123 if (tcon->use_witness)
124 seq_puts(m, " Witness");
125 if (tcon->broken_sparse_sup)
126 seq_puts(m, " nosparse");
127 if (tcon->need_reconnect)
128 seq_puts(m, "\tDISCONNECTED ");
129 spin_lock(&tcon->tc_lock);
130 if (tcon->origin_fullpath) {
131 seq_printf(m, "\n\tDFS origin fullpath: %s",
132 tcon->origin_fullpath);
133 }
134 spin_unlock(&tcon->tc_lock);
135 seq_putc(m, '\n');
136 }
137
138 static void
cifs_dump_channel(struct seq_file * m,int i,struct cifs_chan * chan)139 cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
140 {
141 struct TCP_Server_Info *server = chan->server;
142
143 if (!server) {
144 seq_printf(m, "\n\n\t\tChannel: %d DISABLED", i+1);
145 return;
146 }
147
148 seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
149 "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
150 "\n\t\tTCP status: %d Instance: %d"
151 "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
152 "\n\t\tIn Send: %d In MaxReq Wait: %d",
153 i+1, server->conn_id,
154 server->credits,
155 server->echo_credits,
156 server->oplock_credits,
157 server->dialect,
158 server->tcpStatus,
159 server->reconnect_instance,
160 server->srv_count,
161 server->sec_mode,
162 in_flight(server),
163 atomic_read(&server->in_send),
164 atomic_read(&server->num_waiters));
165 #ifdef CONFIG_NET_NS
166 if (server->net)
167 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
168 #endif /* NET_NS */
169
170 }
171
smb_speed_to_str(size_t bps)172 static inline const char *smb_speed_to_str(size_t bps)
173 {
174 size_t mbps = bps / 1000 / 1000;
175
176 switch (mbps) {
177 case SPEED_10:
178 return "10Mbps";
179 case SPEED_100:
180 return "100Mbps";
181 case SPEED_1000:
182 return "1Gbps";
183 case SPEED_2500:
184 return "2.5Gbps";
185 case SPEED_5000:
186 return "5Gbps";
187 case SPEED_10000:
188 return "10Gbps";
189 case SPEED_14000:
190 return "14Gbps";
191 case SPEED_20000:
192 return "20Gbps";
193 case SPEED_25000:
194 return "25Gbps";
195 case SPEED_40000:
196 return "40Gbps";
197 case SPEED_50000:
198 return "50Gbps";
199 case SPEED_56000:
200 return "56Gbps";
201 case SPEED_100000:
202 return "100Gbps";
203 case SPEED_200000:
204 return "200Gbps";
205 case SPEED_400000:
206 return "400Gbps";
207 case SPEED_800000:
208 return "800Gbps";
209 default:
210 return "Unknown";
211 }
212 }
213
214 static void
cifs_dump_iface(struct seq_file * m,struct cifs_server_iface * iface)215 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
216 {
217 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
218 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
219
220 seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
221 seq_puts(m, "\t\tCapabilities: ");
222 if (iface->rdma_capable)
223 seq_puts(m, "rdma ");
224 if (iface->rss_capable)
225 seq_puts(m, "rss ");
226 if (!iface->rdma_capable && !iface->rss_capable)
227 seq_puts(m, "None");
228 seq_putc(m, '\n');
229 if (iface->sockaddr.ss_family == AF_INET)
230 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
231 else if (iface->sockaddr.ss_family == AF_INET6)
232 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
233 if (!iface->is_active)
234 seq_puts(m, "\t\t[for-cleanup]\n");
235 }
236
cifs_debug_files_proc_show(struct seq_file * m,void * v)237 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
238 {
239 struct TCP_Server_Info *server;
240 struct cifs_ses *ses;
241 struct cifs_tcon *tcon;
242 struct cifsFileInfo *cfile;
243 struct inode *inode;
244 struct cifsInodeInfo *cinode;
245 char lease[4];
246 int n;
247
248 seq_puts(m, "# Version:1\n");
249 seq_puts(m, "# Format:\n");
250 seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
251 #ifdef CONFIG_CIFS_DEBUG2
252 seq_puts(m, " <filename> <lease> <mid>\n");
253 #else
254 seq_puts(m, " <filename> <lease>\n");
255 #endif /* CIFS_DEBUG2 */
256 spin_lock(&cifs_tcp_ses_lock);
257 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
258 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
259 if (cifs_ses_exiting(ses))
260 continue;
261 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
262 spin_lock(&tcon->open_file_lock);
263 list_for_each_entry(cfile, &tcon->openFileList, tlist) {
264 seq_printf(m,
265 "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
266 tcon->tid,
267 ses->Suid,
268 cfile->fid.persistent_fid,
269 cfile->f_flags,
270 cfile->count,
271 cfile->pid,
272 from_kuid(&init_user_ns, cfile->uid),
273 cfile->dentry);
274
275 /* Append lease/oplock caching state as RHW letters */
276 inode = d_inode(cfile->dentry);
277 n = 0;
278 if (inode) {
279 cinode = CIFS_I(inode);
280 if (CIFS_CACHE_READ(cinode))
281 lease[n++] = 'R';
282 if (CIFS_CACHE_HANDLE(cinode))
283 lease[n++] = 'H';
284 if (CIFS_CACHE_WRITE(cinode))
285 lease[n++] = 'W';
286 }
287 lease[n] = '\0';
288 seq_puts(m, " ");
289 if (n)
290 seq_printf(m, "%s", lease);
291 else
292 seq_puts(m, "NONE");
293
294 #ifdef CONFIG_CIFS_DEBUG2
295 seq_printf(m, " %llu", cfile->fid.mid);
296 #endif /* CONFIG_CIFS_DEBUG2 */
297 seq_printf(m, "\n");
298 }
299 spin_unlock(&tcon->open_file_lock);
300 }
301 }
302 }
303 spin_unlock(&cifs_tcp_ses_lock);
304 seq_putc(m, '\n');
305 return 0;
306 }
307
cifs_debug_dirs_proc_show(struct seq_file * m,void * v)308 static int cifs_debug_dirs_proc_show(struct seq_file *m, void *v)
309 {
310 struct list_head *stmp, *tmp, *tmp1;
311 struct TCP_Server_Info *server;
312 struct cifs_ses *ses;
313 struct cifs_tcon *tcon;
314 struct cached_fids *cfids;
315 struct cached_fid *cfid;
316 LIST_HEAD(entry);
317
318 seq_puts(m, "# Version:1\n");
319 seq_puts(m, "# Format:\n");
320 seq_puts(m, "# <tree id> <sess id> <persistent fid> <path>\n");
321
322 spin_lock(&cifs_tcp_ses_lock);
323 list_for_each(stmp, &cifs_tcp_ses_list) {
324 server = list_entry(stmp, struct TCP_Server_Info,
325 tcp_ses_list);
326 list_for_each(tmp, &server->smb_ses_list) {
327 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
328 list_for_each(tmp1, &ses->tcon_list) {
329 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
330 cfids = tcon->cfids;
331 if (!cfids)
332 continue;
333 spin_lock(&cfids->cfid_list_lock); /* check lock ordering */
334 seq_printf(m, "Num entries: %d, cached_dirents: %lu entries, %llu bytes\n",
335 cfids->num_entries,
336 (unsigned long)atomic_long_read(&cfids->total_dirents_entries),
337 (unsigned long long)atomic64_read(&cfids->total_dirents_bytes));
338 list_for_each_entry(cfid, &cfids->entries, entry) {
339 seq_printf(m, "0x%x 0x%llx 0x%llx %s",
340 tcon->tid,
341 ses->Suid,
342 cfid->fid.persistent_fid,
343 cfid->path);
344 if (cfid->file_all_info_is_valid)
345 seq_printf(m, "\tvalid file info");
346 if (cfid->dirents.is_valid)
347 seq_printf(m, ", valid dirents");
348 if (!list_empty(&cfid->dirents.entries))
349 seq_printf(m, ", dirents: %lu entries, %lu bytes",
350 cfid->dirents.entries_count, cfid->dirents.bytes_used);
351 seq_printf(m, "\n");
352 }
353 spin_unlock(&cfids->cfid_list_lock);
354 }
355 }
356 }
357 spin_unlock(&cifs_tcp_ses_lock);
358 seq_putc(m, '\n');
359 return 0;
360 }
361
compression_alg_str(__le16 alg)362 static __always_inline const char *compression_alg_str(__le16 alg)
363 {
364 switch (alg) {
365 case SMB3_COMPRESS_NONE:
366 return "NONE";
367 case SMB3_COMPRESS_LZNT1:
368 return "LZNT1";
369 case SMB3_COMPRESS_LZ77:
370 return "LZ77";
371 case SMB3_COMPRESS_LZ77_HUFF:
372 return "LZ77-Huffman";
373 case SMB3_COMPRESS_PATTERN:
374 return "Pattern_V1";
375 default:
376 return "invalid";
377 }
378 }
379
cipher_alg_str(__le16 cipher)380 static __always_inline const char *cipher_alg_str(__le16 cipher)
381 {
382 switch (cipher) {
383 case SMB2_ENCRYPTION_AES128_CCM:
384 return "AES128-CCM";
385 case SMB2_ENCRYPTION_AES128_GCM:
386 return "AES128-GCM";
387 case SMB2_ENCRYPTION_AES256_CCM:
388 return "AES256-CCM";
389 case SMB2_ENCRYPTION_AES256_GCM:
390 return "AES256-GCM";
391 default:
392 return "UNKNOWN";
393 }
394 }
395
cifs_debug_data_proc_show(struct seq_file * m,void * v)396 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
397 {
398 struct mid_q_entry *mid_entry;
399 struct TCP_Server_Info *server;
400 struct TCP_Server_Info *chan_server;
401 struct cifs_ses *ses;
402 struct cifs_tcon *tcon;
403 struct cifs_server_iface *iface;
404 size_t iface_weight = 0, iface_min_speed = 0;
405 struct cifs_server_iface *last_iface = NULL;
406 int c, i, j;
407
408 seq_puts(m,
409 "Display Internal CIFS Data Structures for Debugging\n"
410 "---------------------------------------------------\n");
411 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
412 seq_printf(m, "Features:");
413 #ifdef CONFIG_CIFS_DFS_UPCALL
414 seq_printf(m, " DFS");
415 #endif
416 #ifdef CONFIG_CIFS_FSCACHE
417 seq_printf(m, ",FSCACHE");
418 #endif
419 #ifdef CONFIG_CIFS_SMB_DIRECT
420 seq_printf(m, ",SMB_DIRECT");
421 #endif
422 #ifdef CONFIG_CIFS_STATS2
423 seq_printf(m, ",STATS2");
424 #else
425 seq_printf(m, ",STATS");
426 #endif
427 #ifdef CONFIG_CIFS_DEBUG2
428 seq_printf(m, ",DEBUG2");
429 #elif defined(CONFIG_CIFS_DEBUG)
430 seq_printf(m, ",DEBUG");
431 #endif
432 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
433 seq_printf(m, ",ALLOW_INSECURE_LEGACY");
434 #endif
435 #ifdef CONFIG_CIFS_POSIX
436 seq_printf(m, ",CIFS_POSIX");
437 #endif
438 #ifdef CONFIG_CIFS_UPCALL
439 seq_printf(m, ",UPCALL(SPNEGO)");
440 #endif
441 #ifdef CONFIG_CIFS_XATTR
442 seq_printf(m, ",XATTR");
443 #endif
444 seq_printf(m, ",ACL");
445 #ifdef CONFIG_CIFS_SWN_UPCALL
446 seq_puts(m, ",WITNESS");
447 #endif
448 #ifdef CONFIG_CIFS_COMPRESSION
449 seq_puts(m, ",COMPRESSION");
450 #endif
451 seq_putc(m, '\n');
452 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
453 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
454
455 seq_printf(m, "\nServers: ");
456
457 c = 0;
458 spin_lock(&cifs_tcp_ses_lock);
459 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
460 #ifdef CONFIG_CIFS_SMB_DIRECT
461 struct smbdirect_socket *sc;
462 struct smbdirect_socket_parameters *sp;
463 #endif
464
465 /* channel info will be printed as a part of sessions below */
466 if (SERVER_IS_CHAN(server))
467 continue;
468
469 c++;
470 seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
471 c, server->conn_id);
472
473 spin_lock(&server->srv_lock);
474 if (server->hostname)
475 seq_printf(m, "Hostname: %s ", server->hostname);
476 seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
477 spin_unlock(&server->srv_lock);
478 #ifdef CONFIG_CIFS_SMB_DIRECT
479 if (!server->rdma)
480 goto skip_rdma;
481
482 if (!server->smbd_conn) {
483 seq_printf(m, "\nSMBDirect transport not available");
484 goto skip_rdma;
485 }
486 sc = &server->smbd_conn->socket;
487 sp = &sc->parameters;
488
489 seq_printf(m, "\nSMBDirect protocol version: 0x%x "
490 "transport status: %s (%u)",
491 SMBDIRECT_V1,
492 smbdirect_socket_status_string(sc->status),
493 sc->status);
494 seq_printf(m, "\nConn receive_credit_max: %u "
495 "send_credit_target: %u max_send_size: %u",
496 sp->recv_credit_max,
497 sp->send_credit_target,
498 sp->max_send_size);
499 seq_printf(m, "\nConn max_fragmented_recv_size: %u "
500 "max_fragmented_send_size: %u max_receive_size:%u",
501 sp->max_fragmented_recv_size,
502 sp->max_fragmented_send_size,
503 sp->max_recv_size);
504 seq_printf(m, "\nConn keep_alive_interval: %u "
505 "max_readwrite_size: %u rdma_readwrite_threshold: %u",
506 sp->keepalive_interval_msec * 1000,
507 sp->max_read_write_size,
508 server->rdma_readwrite_threshold);
509 seq_printf(m, "\nDebug count_get_receive_buffer: %llu "
510 "count_put_receive_buffer: %llu count_send_empty: %llu",
511 sc->statistics.get_receive_buffer,
512 sc->statistics.put_receive_buffer,
513 sc->statistics.send_empty);
514 seq_printf(m, "\nRead Queue "
515 "count_enqueue_reassembly_queue: %llu "
516 "count_dequeue_reassembly_queue: %llu "
517 "reassembly_data_length: %u "
518 "reassembly_queue_length: %u",
519 sc->statistics.enqueue_reassembly_queue,
520 sc->statistics.dequeue_reassembly_queue,
521 sc->recv_io.reassembly.data_length,
522 sc->recv_io.reassembly.queue_length);
523 seq_printf(m, "\nCurrent Credits send_credits: %u "
524 "receive_credits: %u receive_credit_target: %u",
525 atomic_read(&sc->send_io.credits.count),
526 atomic_read(&sc->recv_io.credits.count),
527 sc->recv_io.credits.target);
528 seq_printf(m, "\nPending send_pending: %u ",
529 atomic_read(&sc->send_io.pending.count));
530 seq_printf(m, "\nMR responder_resources: %u "
531 "max_frmr_depth: %u mr_type: 0x%x",
532 sp->responder_resources,
533 sp->max_frmr_depth,
534 sc->mr_io.type);
535 seq_printf(m, "\nMR mr_ready_count: %u mr_used_count: %u",
536 atomic_read(&sc->mr_io.ready.count),
537 atomic_read(&sc->mr_io.used.count));
538 skip_rdma:
539 #endif
540 seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
541 server->credits,
542 server->echo_credits,
543 server->oplock_credits,
544 server->dialect);
545 if (server->sign)
546 seq_printf(m, " signed");
547 if (server->posix_ext_supported)
548 seq_printf(m, " posix");
549 if (server->nosharesock)
550 seq_printf(m, " nosharesock");
551
552 seq_printf(m, "\nServer capabilities: 0x%x", server->capabilities);
553
554 if (server->rdma)
555 seq_printf(m, "\nRDMA ");
556 seq_printf(m, "\nTCP status: %d Instance: %d"
557 "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
558 server->tcpStatus,
559 server->reconnect_instance,
560 server->srv_count,
561 server->sec_mode, in_flight(server));
562 #ifdef CONFIG_NET_NS
563 if (server->net)
564 seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
565 #endif /* NET_NS */
566
567 seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
568 atomic_read(&server->in_send),
569 atomic_read(&server->num_waiters));
570
571 if (server->leaf_fullpath) {
572 seq_printf(m, "\nDFS leaf full path: %s",
573 server->leaf_fullpath);
574 }
575
576 seq_puts(m, "\nCompression: ");
577 if (!IS_ENABLED(CONFIG_CIFS_COMPRESSION))
578 seq_puts(m, "no built-in support");
579 else if (!server->compression.requested)
580 seq_puts(m, "disabled on mount");
581 else if (server->compression.enabled)
582 seq_printf(m, "enabled (%s)", compression_alg_str(server->compression.alg));
583 else
584 seq_puts(m, "disabled (not supported by this server)");
585
586 /* Show negotiated encryption cipher, even if not required */
587 seq_puts(m, "\nEncryption: ");
588 if (server->cipher_type)
589 seq_printf(m, "Negotiated cipher (%s)", cipher_alg_str(server->cipher_type));
590
591 seq_printf(m, "\n\n\tSessions: ");
592 i = 0;
593 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
594 spin_lock(&ses->ses_lock);
595 if (ses->ses_status == SES_EXITING) {
596 spin_unlock(&ses->ses_lock);
597 continue;
598 }
599 i++;
600 if ((ses->serverDomain == NULL) ||
601 (ses->serverOS == NULL) ||
602 (ses->serverNOS == NULL)) {
603 seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
604 i, ses->ip_addr, ses->ses_count,
605 ses->capabilities, ses->ses_status);
606 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
607 seq_printf(m, "Guest ");
608 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
609 seq_printf(m, "Anonymous ");
610 } else {
611 seq_printf(m,
612 "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s "
613 "\n\tNOS: %s\tCapability: 0x%x"
614 "\n\tSMB session status: %d ",
615 i, ses->ip_addr, ses->serverDomain,
616 ses->ses_count, ses->serverOS, ses->serverNOS,
617 ses->capabilities, ses->ses_status);
618 }
619 if (ses->expired_pwd)
620 seq_puts(m, "password no longer valid ");
621 spin_unlock(&ses->ses_lock);
622
623 seq_printf(m, "\n\tSecurity type: %s ",
624 get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
625
626 /* dump session id helpful for use with network trace */
627 seq_printf(m, " SessionId: 0x%llx", ses->Suid);
628 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
629 seq_puts(m, " encrypted");
630 if (ses->sign)
631 seq_puts(m, " signed");
632
633 seq_printf(m, "\n\tUser: %d Cred User: %d",
634 from_kuid(&init_user_ns, ses->linux_uid),
635 from_kuid(&init_user_ns, ses->cred_uid));
636
637 if (ses->dfs_root_ses) {
638 seq_printf(m, "\n\tDFS root session id: 0x%llx",
639 ses->dfs_root_ses->Suid);
640 }
641
642 spin_lock(&ses->chan_lock);
643 if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
644 seq_puts(m, "\tPrimary channel: DISCONNECTED ");
645 if (CIFS_CHAN_IN_RECONNECT(ses, 0))
646 seq_puts(m, "\t[RECONNECTING] ");
647
648 if (ses->chan_count > 1) {
649 seq_printf(m, "\n\n\tExtra Channels: %zu ",
650 ses->chan_count-1);
651 for (j = 1; j < ses->chan_count; j++) {
652 cifs_dump_channel(m, j, &ses->chans[j]);
653 if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
654 seq_puts(m, "\tDISCONNECTED ");
655 if (CIFS_CHAN_IN_RECONNECT(ses, j))
656 seq_puts(m, "\t[RECONNECTING] ");
657 }
658 }
659 spin_unlock(&ses->chan_lock);
660
661 seq_puts(m, "\n\n\tShares: ");
662 j = 0;
663
664 seq_printf(m, "\n\t%d) IPC: ", j);
665 if (ses->tcon_ipc)
666 cifs_debug_tcon(m, ses->tcon_ipc);
667 else
668 seq_puts(m, "none\n");
669
670 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
671 ++j;
672 seq_printf(m, "\n\t%d) ", j);
673 cifs_debug_tcon(m, tcon);
674 }
675
676 spin_lock(&ses->iface_lock);
677 if (ses->iface_count)
678 seq_printf(m, "\n\n\tServer interfaces: %zu"
679 "\tLast updated: %lu seconds ago",
680 ses->iface_count,
681 (jiffies - ses->iface_last_update) / HZ);
682
683 last_iface = list_last_entry(&ses->iface_list,
684 struct cifs_server_iface,
685 iface_head);
686 iface_min_speed = last_iface->speed;
687
688 j = 0;
689 list_for_each_entry(iface, &ses->iface_list,
690 iface_head) {
691 seq_printf(m, "\n\t%d)", ++j);
692 cifs_dump_iface(m, iface);
693
694 iface_weight = iface->speed / iface_min_speed;
695 seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
696 "\n\t\tAllocated channels: %u\n",
697 iface->weight_fulfilled,
698 iface_weight,
699 iface->num_channels);
700
701 if (is_ses_using_iface(ses, iface))
702 seq_puts(m, "\t\t[CONNECTED]\n");
703 }
704 spin_unlock(&ses->iface_lock);
705
706 seq_puts(m, "\n\n\tMIDs: ");
707 spin_lock(&ses->chan_lock);
708 for (j = 0; j < ses->chan_count; j++) {
709 chan_server = ses->chans[j].server;
710 if (!chan_server)
711 continue;
712
713 if (list_empty(&chan_server->pending_mid_q))
714 continue;
715
716 seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
717 chan_server->conn_id);
718 spin_lock(&chan_server->mid_queue_lock);
719 list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
720 seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
721 mid_entry->mid_state,
722 le16_to_cpu(mid_entry->command),
723 mid_entry->pid,
724 mid_entry->callback_data,
725 mid_entry->mid);
726 }
727 spin_unlock(&chan_server->mid_queue_lock);
728 }
729 spin_unlock(&ses->chan_lock);
730 seq_puts(m, "\n--\n");
731 }
732 if (i == 0)
733 seq_printf(m, "\n\t\t[NONE]");
734 }
735 if (c == 0)
736 seq_printf(m, "\n\t[NONE]");
737
738 spin_unlock(&cifs_tcp_ses_lock);
739 seq_putc(m, '\n');
740 cifs_swn_dump(m);
741
742 /* BB add code to dump additional info such as TCP session info now */
743 return 0;
744 }
745
cifs_stats_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)746 static ssize_t cifs_stats_proc_write(struct file *file,
747 const char __user *buffer, size_t count, loff_t *ppos)
748 {
749 bool bv;
750 int rc;
751 struct TCP_Server_Info *server;
752 struct cifs_ses *ses;
753 struct cifs_tcon *tcon;
754
755 rc = kstrtobool_from_user(buffer, count, &bv);
756 if (rc == 0) {
757 #ifdef CONFIG_CIFS_STATS2
758 int i;
759
760 atomic_set(&total_buf_alloc_count, 0);
761 atomic_set(&total_small_buf_alloc_count, 0);
762 #endif /* CONFIG_CIFS_STATS2 */
763 atomic_set(&tcpSesReconnectCount, 0);
764 atomic_set(&tconInfoReconnectCount, 0);
765
766 spin_lock(&GlobalMid_Lock);
767 GlobalMaxActiveXid = 0;
768 GlobalCurrentXid = 0;
769 spin_unlock(&GlobalMid_Lock);
770 spin_lock(&cifs_tcp_ses_lock);
771 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
772 server->max_in_flight = 0;
773 #ifdef CONFIG_CIFS_STATS2
774 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
775 atomic_set(&server->num_cmds[i], 0);
776 atomic_set(&server->smb2slowcmd[i], 0);
777 server->time_per_cmd[i] = 0;
778 server->slowest_cmd[i] = 0;
779 server->fastest_cmd[0] = 0;
780 }
781 #endif /* CONFIG_CIFS_STATS2 */
782 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
783 if (cifs_ses_exiting(ses))
784 continue;
785 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
786 atomic_set(&tcon->num_smbs_sent, 0);
787 spin_lock(&tcon->stat_lock);
788 tcon->bytes_read = 0;
789 tcon->bytes_written = 0;
790 tcon->stats_from_time = ktime_get_real_seconds();
791 spin_unlock(&tcon->stat_lock);
792 if (server->ops->clear_stats)
793 server->ops->clear_stats(tcon);
794 }
795 }
796 }
797 spin_unlock(&cifs_tcp_ses_lock);
798 } else {
799 return rc;
800 }
801
802 return count;
803 }
804
cifs_stats_proc_show(struct seq_file * m,void * v)805 static int cifs_stats_proc_show(struct seq_file *m, void *v)
806 {
807 int i;
808 #ifdef CONFIG_CIFS_STATS2
809 int j;
810 #endif /* STATS2 */
811 struct TCP_Server_Info *server;
812 struct cifs_ses *ses;
813 struct cifs_tcon *tcon;
814
815 seq_printf(m, "Resources in use\nCIFS Session: %d\n",
816 sesInfoAllocCount.counter);
817 seq_printf(m, "Share (unique mount targets): %d\n",
818 tconInfoAllocCount.counter);
819 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
820 buf_alloc_count.counter,
821 cifs_min_rcv + tcpSesAllocCount.counter);
822 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
823 small_buf_alloc_count.counter, cifs_min_small);
824 #ifdef CONFIG_CIFS_STATS2
825 seq_printf(m, "Total Large %d Small %d Allocations\n",
826 atomic_read(&total_buf_alloc_count),
827 atomic_read(&total_small_buf_alloc_count));
828 #endif /* CONFIG_CIFS_STATS2 */
829
830 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
831 seq_printf(m,
832 "\n%d session %d share reconnects\n",
833 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
834
835 seq_printf(m,
836 "Total vfs operations: %d maximum at one time: %d\n",
837 GlobalCurrentXid, GlobalMaxActiveXid);
838
839 i = 0;
840 spin_lock(&cifs_tcp_ses_lock);
841 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
842 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
843 #ifdef CONFIG_CIFS_STATS2
844 seq_puts(m, "\nTotal time spent processing by command. Time ");
845 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
846 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
847 seq_puts(m, " --------\t------\t----------\t-------\t-------\n");
848 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
849 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j,
850 atomic_read(&server->num_cmds[j]),
851 server->time_per_cmd[j],
852 server->fastest_cmd[j],
853 server->slowest_cmd[j]);
854 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
855 if (atomic_read(&server->smb2slowcmd[j])) {
856 spin_lock(&server->srv_lock);
857 seq_printf(m, " %d slow responses from %s for command %d\n",
858 atomic_read(&server->smb2slowcmd[j]),
859 server->hostname, j);
860 spin_unlock(&server->srv_lock);
861 }
862 #endif /* STATS2 */
863 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
864 if (cifs_ses_exiting(ses))
865 continue;
866 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
867 i++;
868 seq_printf(m, "\n%d) %s", i, tcon->tree_name);
869 if (tcon->need_reconnect)
870 seq_puts(m, "\tDISCONNECTED ");
871 seq_printf(m, "\nSMBs: %d since %ptTs UTC",
872 atomic_read(&tcon->num_smbs_sent),
873 &tcon->stats_from_time);
874 if (server->ops->print_stats)
875 server->ops->print_stats(m, tcon);
876 }
877 }
878 }
879 spin_unlock(&cifs_tcp_ses_lock);
880
881 seq_putc(m, '\n');
882 return 0;
883 }
884
cifs_stats_proc_open(struct inode * inode,struct file * file)885 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
886 {
887 return single_open(file, cifs_stats_proc_show, NULL);
888 }
889
890 static const struct proc_ops cifs_stats_proc_ops = {
891 .proc_open = cifs_stats_proc_open,
892 .proc_read = seq_read,
893 .proc_lseek = seq_lseek,
894 .proc_release = single_release,
895 .proc_write = cifs_stats_proc_write,
896 };
897
898 #ifdef CONFIG_CIFS_SMB_DIRECT
899 #define PROC_FILE_DEFINE(name) \
900 static ssize_t name##_write(struct file *file, const char __user *buffer, \
901 size_t count, loff_t *ppos) \
902 { \
903 int rc; \
904 rc = kstrtoint_from_user(buffer, count, 10, &name); \
905 if (rc) \
906 return rc; \
907 return count; \
908 } \
909 static int name##_proc_show(struct seq_file *m, void *v) \
910 { \
911 seq_printf(m, "%d\n", name); \
912 return 0; \
913 } \
914 static int name##_open(struct inode *inode, struct file *file) \
915 { \
916 return single_open(file, name##_proc_show, NULL); \
917 } \
918 \
919 static const struct proc_ops cifs_##name##_proc_fops = { \
920 .proc_open = name##_open, \
921 .proc_read = seq_read, \
922 .proc_lseek = seq_lseek, \
923 .proc_release = single_release, \
924 .proc_write = name##_write, \
925 }
926
927 PROC_FILE_DEFINE(rdma_readwrite_threshold);
928 PROC_FILE_DEFINE(smbd_max_frmr_depth);
929 PROC_FILE_DEFINE(smbd_keep_alive_interval);
930 PROC_FILE_DEFINE(smbd_max_receive_size);
931 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
932 PROC_FILE_DEFINE(smbd_max_send_size);
933 PROC_FILE_DEFINE(smbd_send_credit_target);
934 PROC_FILE_DEFINE(smbd_receive_credit_max);
935 #endif
936
937 static struct proc_dir_entry *proc_fs_cifs;
938 static const struct proc_ops cifsFYI_proc_ops;
939 static const struct proc_ops cifs_lookup_cache_proc_ops;
940 static const struct proc_ops traceSMB_proc_ops;
941 static const struct proc_ops cifs_security_flags_proc_ops;
942 static const struct proc_ops cifs_linux_ext_proc_ops;
943 static const struct proc_ops cifs_mount_params_proc_ops;
944
945 void
cifs_proc_init(void)946 cifs_proc_init(void)
947 {
948 proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
949 if (proc_fs_cifs == NULL)
950 return;
951
952 proc_create_single("DebugData", 0, proc_fs_cifs,
953 cifs_debug_data_proc_show);
954
955 proc_create_single("open_files", 0400, proc_fs_cifs,
956 cifs_debug_files_proc_show);
957
958 proc_create_single("open_dirs", 0400, proc_fs_cifs,
959 cifs_debug_dirs_proc_show);
960
961 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
962 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
963 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
964 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
965 &cifs_linux_ext_proc_ops);
966 proc_create("SecurityFlags", 0644, proc_fs_cifs,
967 &cifs_security_flags_proc_ops);
968 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
969 &cifs_lookup_cache_proc_ops);
970
971 proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
972
973 #ifdef CONFIG_CIFS_DFS_UPCALL
974 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
975 #endif
976
977 #ifdef CONFIG_CIFS_SMB_DIRECT
978 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
979 &cifs_rdma_readwrite_threshold_proc_fops);
980 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
981 &cifs_smbd_max_frmr_depth_proc_fops);
982 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
983 &cifs_smbd_keep_alive_interval_proc_fops);
984 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
985 &cifs_smbd_max_receive_size_proc_fops);
986 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
987 &cifs_smbd_max_fragmented_recv_size_proc_fops);
988 proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
989 &cifs_smbd_max_send_size_proc_fops);
990 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
991 &cifs_smbd_send_credit_target_proc_fops);
992 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
993 &cifs_smbd_receive_credit_max_proc_fops);
994 #endif
995 }
996
997 void
cifs_proc_clean(void)998 cifs_proc_clean(void)
999 {
1000 if (proc_fs_cifs == NULL)
1001 return;
1002
1003 remove_proc_entry("DebugData", proc_fs_cifs);
1004 remove_proc_entry("open_files", proc_fs_cifs);
1005 remove_proc_entry("open_dirs", proc_fs_cifs);
1006 remove_proc_entry("cifsFYI", proc_fs_cifs);
1007 remove_proc_entry("traceSMB", proc_fs_cifs);
1008 remove_proc_entry("Stats", proc_fs_cifs);
1009 remove_proc_entry("SecurityFlags", proc_fs_cifs);
1010 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
1011 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
1012 remove_proc_entry("mount_params", proc_fs_cifs);
1013
1014 #ifdef CONFIG_CIFS_DFS_UPCALL
1015 remove_proc_entry("dfscache", proc_fs_cifs);
1016 #endif
1017 #ifdef CONFIG_CIFS_SMB_DIRECT
1018 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
1019 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
1020 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
1021 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
1022 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
1023 remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
1024 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
1025 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
1026 #endif
1027 remove_proc_entry("fs/cifs", NULL);
1028 }
1029
cifsFYI_proc_show(struct seq_file * m,void * v)1030 static int cifsFYI_proc_show(struct seq_file *m, void *v)
1031 {
1032 seq_printf(m, "%d\n", cifsFYI);
1033 return 0;
1034 }
1035
cifsFYI_proc_open(struct inode * inode,struct file * file)1036 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
1037 {
1038 return single_open(file, cifsFYI_proc_show, NULL);
1039 }
1040
cifsFYI_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1041 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
1042 size_t count, loff_t *ppos)
1043 {
1044 char c[2] = { '\0' };
1045 bool bv;
1046 int rc;
1047
1048 rc = get_user(c[0], buffer);
1049 if (rc)
1050 return rc;
1051 if (kstrtobool(c, &bv) == 0)
1052 cifsFYI = bv;
1053 else if ((c[0] > '1') && (c[0] <= '9'))
1054 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
1055 else
1056 return -EINVAL;
1057
1058 return count;
1059 }
1060
1061 static const struct proc_ops cifsFYI_proc_ops = {
1062 .proc_open = cifsFYI_proc_open,
1063 .proc_read = seq_read,
1064 .proc_lseek = seq_lseek,
1065 .proc_release = single_release,
1066 .proc_write = cifsFYI_proc_write,
1067 };
1068
cifs_linux_ext_proc_show(struct seq_file * m,void * v)1069 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
1070 {
1071 seq_printf(m, "%d\n", linuxExtEnabled);
1072 return 0;
1073 }
1074
cifs_linux_ext_proc_open(struct inode * inode,struct file * file)1075 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
1076 {
1077 return single_open(file, cifs_linux_ext_proc_show, NULL);
1078 }
1079
cifs_linux_ext_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1080 static ssize_t cifs_linux_ext_proc_write(struct file *file,
1081 const char __user *buffer, size_t count, loff_t *ppos)
1082 {
1083 int rc;
1084
1085 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
1086 if (rc)
1087 return rc;
1088
1089 return count;
1090 }
1091
1092 static const struct proc_ops cifs_linux_ext_proc_ops = {
1093 .proc_open = cifs_linux_ext_proc_open,
1094 .proc_read = seq_read,
1095 .proc_lseek = seq_lseek,
1096 .proc_release = single_release,
1097 .proc_write = cifs_linux_ext_proc_write,
1098 };
1099
cifs_lookup_cache_proc_show(struct seq_file * m,void * v)1100 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
1101 {
1102 seq_printf(m, "%d\n", lookupCacheEnabled);
1103 return 0;
1104 }
1105
cifs_lookup_cache_proc_open(struct inode * inode,struct file * file)1106 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
1107 {
1108 return single_open(file, cifs_lookup_cache_proc_show, NULL);
1109 }
1110
cifs_lookup_cache_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1111 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
1112 const char __user *buffer, size_t count, loff_t *ppos)
1113 {
1114 int rc;
1115
1116 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
1117 if (rc)
1118 return rc;
1119
1120 return count;
1121 }
1122
1123 static const struct proc_ops cifs_lookup_cache_proc_ops = {
1124 .proc_open = cifs_lookup_cache_proc_open,
1125 .proc_read = seq_read,
1126 .proc_lseek = seq_lseek,
1127 .proc_release = single_release,
1128 .proc_write = cifs_lookup_cache_proc_write,
1129 };
1130
traceSMB_proc_show(struct seq_file * m,void * v)1131 static int traceSMB_proc_show(struct seq_file *m, void *v)
1132 {
1133 seq_printf(m, "%d\n", traceSMB);
1134 return 0;
1135 }
1136
traceSMB_proc_open(struct inode * inode,struct file * file)1137 static int traceSMB_proc_open(struct inode *inode, struct file *file)
1138 {
1139 return single_open(file, traceSMB_proc_show, NULL);
1140 }
1141
traceSMB_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1142 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
1143 size_t count, loff_t *ppos)
1144 {
1145 int rc;
1146
1147 rc = kstrtobool_from_user(buffer, count, &traceSMB);
1148 if (rc)
1149 return rc;
1150
1151 return count;
1152 }
1153
1154 static const struct proc_ops traceSMB_proc_ops = {
1155 .proc_open = traceSMB_proc_open,
1156 .proc_read = seq_read,
1157 .proc_lseek = seq_lseek,
1158 .proc_release = single_release,
1159 .proc_write = traceSMB_proc_write,
1160 };
1161
cifs_security_flags_proc_show(struct seq_file * m,void * v)1162 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
1163 {
1164 seq_printf(m, "0x%x\n", global_secflags);
1165 return 0;
1166 }
1167
cifs_security_flags_proc_open(struct inode * inode,struct file * file)1168 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
1169 {
1170 return single_open(file, cifs_security_flags_proc_show, NULL);
1171 }
1172
1173 /*
1174 * Ensure that if someone sets a MUST flag, that we disable all other MAY
1175 * flags except for the ones corresponding to the given MUST flag. If there are
1176 * multiple MUST flags, then try to prefer more secure ones.
1177 */
1178 static void
cifs_security_flags_handle_must_flags(unsigned int * flags)1179 cifs_security_flags_handle_must_flags(unsigned int *flags)
1180 {
1181 unsigned int signflags = *flags & (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL);
1182
1183 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
1184 *flags = CIFSSEC_MUST_KRB5;
1185 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
1186 *flags = CIFSSEC_MUST_NTLMSSP;
1187 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
1188 *flags = CIFSSEC_MUST_NTLMV2;
1189
1190 *flags |= signflags;
1191 }
1192
cifs_security_flags_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)1193 static ssize_t cifs_security_flags_proc_write(struct file *file,
1194 const char __user *buffer, size_t count, loff_t *ppos)
1195 {
1196 int rc;
1197 unsigned int flags;
1198 char flags_string[12];
1199 bool bv;
1200
1201 if ((count < 1) || (count > 11))
1202 return -EINVAL;
1203
1204 memset(flags_string, 0, sizeof(flags_string));
1205
1206 if (copy_from_user(flags_string, buffer, count))
1207 return -EFAULT;
1208
1209 if (count < 3) {
1210 /* single char or single char followed by null */
1211 if (kstrtobool(flags_string, &bv) == 0) {
1212 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
1213 return count;
1214 } else if (!isdigit(flags_string[0])) {
1215 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1216 flags_string);
1217 return -EINVAL;
1218 }
1219 }
1220
1221 /* else we have a number */
1222 rc = kstrtouint(flags_string, 0, &flags);
1223 if (rc) {
1224 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
1225 flags_string);
1226 return rc;
1227 }
1228
1229 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
1230
1231 if (flags == 0) {
1232 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
1233 return -EINVAL;
1234 }
1235
1236 if (flags & ~CIFSSEC_MASK) {
1237 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
1238 flags & ~CIFSSEC_MASK);
1239 return -EINVAL;
1240 }
1241
1242 cifs_security_flags_handle_must_flags(&flags);
1243
1244 /* flags look ok - update the global security flags for cifs module */
1245 global_secflags = flags;
1246 if (global_secflags & CIFSSEC_MUST_SIGN) {
1247 /* requiring signing implies signing is allowed */
1248 global_secflags |= CIFSSEC_MAY_SIGN;
1249 cifs_dbg(FYI, "packet signing now required\n");
1250 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
1251 cifs_dbg(FYI, "packet signing disabled\n");
1252 }
1253 /* BB should we turn on MAY flags for other MUST options? */
1254 return count;
1255 }
1256
1257 static const struct proc_ops cifs_security_flags_proc_ops = {
1258 .proc_open = cifs_security_flags_proc_open,
1259 .proc_read = seq_read,
1260 .proc_lseek = seq_lseek,
1261 .proc_release = single_release,
1262 .proc_write = cifs_security_flags_proc_write,
1263 };
1264
1265 /* To make it easier to debug, can help to show mount params */
cifs_mount_params_proc_show(struct seq_file * m,void * v)1266 static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
1267 {
1268 const struct fs_parameter_spec *p;
1269 const char *type;
1270
1271 for (p = smb3_fs_parameters; p->name; p++) {
1272 /* cannot use switch with pointers... */
1273 if (!p->type) {
1274 if (p->flags == fs_param_neg_with_no)
1275 type = "noflag";
1276 else
1277 type = "flag";
1278 } else if (p->type == fs_param_is_bool)
1279 type = "bool";
1280 else if (p->type == fs_param_is_u32)
1281 type = "u32";
1282 else if (p->type == fs_param_is_u64)
1283 type = "u64";
1284 else if (p->type == fs_param_is_string)
1285 type = "string";
1286 else
1287 type = "unknown";
1288
1289 seq_printf(m, "%s:%s\n", p->name, type);
1290 }
1291
1292 return 0;
1293 }
1294
cifs_mount_params_proc_open(struct inode * inode,struct file * file)1295 static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
1296 {
1297 return single_open(file, cifs_mount_params_proc_show, NULL);
1298 }
1299
1300 static const struct proc_ops cifs_mount_params_proc_ops = {
1301 .proc_open = cifs_mount_params_proc_open,
1302 .proc_read = seq_read,
1303 .proc_lseek = seq_lseek,
1304 .proc_release = single_release,
1305 /* No need for write for now */
1306 /* .proc_write = cifs_mount_params_proc_write, */
1307 };
1308
1309 #else
cifs_proc_init(void)1310 inline void cifs_proc_init(void)
1311 {
1312 }
1313
cifs_proc_clean(void)1314 inline void cifs_proc_clean(void)
1315 {
1316 }
1317 #endif /* PROC_FS */
1318