1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SMB2 version specific operations
4 *
5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
6 */
7
8 #include <linux/pagemap.h>
9 #include <linux/vfs.h>
10 #include <linux/falloc.h>
11 #include <linux/scatterlist.h>
12 #include <linux/uuid.h>
13 #include <linux/sort.h>
14 #include <crypto/aead.h>
15 #include <linux/fiemap.h>
16 #include <uapi/linux/magic.h>
17 #include "cifsfs.h"
18 #include "cifsglob.h"
19 #include "smb2pdu.h"
20 #include "smb2proto.h"
21 #include "cifsproto.h"
22 #include "cifs_debug.h"
23 #include "cifs_unicode.h"
24 #include "smb2status.h"
25 #include "smb2glob.h"
26 #include "cifs_ioctl.h"
27 #include "smbdirect.h"
28 #include "fscache.h"
29 #include "fs_context.h"
30 #include "cached_dir.h"
31 #include "reparse.h"
32
33 /* Change credits for different ops and return the total number of credits */
34 static int
change_conf(struct TCP_Server_Info * server)35 change_conf(struct TCP_Server_Info *server)
36 {
37 server->credits += server->echo_credits + server->oplock_credits;
38 if (server->credits > server->max_credits)
39 server->credits = server->max_credits;
40 server->oplock_credits = server->echo_credits = 0;
41 switch (server->credits) {
42 case 0:
43 return 0;
44 case 1:
45 server->echoes = false;
46 server->oplocks = false;
47 break;
48 case 2:
49 server->echoes = true;
50 server->oplocks = false;
51 server->echo_credits = 1;
52 break;
53 default:
54 server->echoes = true;
55 if (enable_oplocks) {
56 server->oplocks = true;
57 server->oplock_credits = 1;
58 } else
59 server->oplocks = false;
60
61 server->echo_credits = 1;
62 }
63 server->credits -= server->echo_credits + server->oplock_credits;
64 return server->credits + server->echo_credits + server->oplock_credits;
65 }
66
67 static void
smb2_add_credits(struct TCP_Server_Info * server,const struct cifs_credits * credits,const int optype)68 smb2_add_credits(struct TCP_Server_Info *server,
69 const struct cifs_credits *credits, const int optype)
70 {
71 int *val, rc = -1;
72 int scredits, in_flight;
73 unsigned int add = credits->value;
74 unsigned int instance = credits->instance;
75 bool reconnect_detected = false;
76 bool reconnect_with_invalid_credits = false;
77
78 spin_lock(&server->req_lock);
79 val = server->ops->get_credits_field(server, optype);
80
81 /* eg found case where write overlapping reconnect messed up credits */
82 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
83 reconnect_with_invalid_credits = true;
84
85 if ((instance == 0) || (instance == server->reconnect_instance))
86 *val += add;
87 else
88 reconnect_detected = true;
89
90 if (*val > 65000) {
91 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
92 pr_warn_once("server overflowed SMB3 credits\n");
93 trace_smb3_overflow_credits(server->CurrentMid,
94 server->conn_id, server->hostname, *val,
95 add, server->in_flight);
96 }
97 WARN_ON_ONCE(server->in_flight == 0);
98 server->in_flight--;
99 if (server->in_flight == 0 &&
100 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
101 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
102 rc = change_conf(server);
103 /*
104 * Sometimes server returns 0 credits on oplock break ack - we need to
105 * rebalance credits in this case.
106 */
107 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
108 server->oplocks) {
109 if (server->credits > 1) {
110 server->credits--;
111 server->oplock_credits++;
112 }
113 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
114 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
115 /* if now have too many oplock credits, rebalance so don't starve normal ops */
116 change_conf(server);
117
118 scredits = *val;
119 in_flight = server->in_flight;
120 spin_unlock(&server->req_lock);
121 wake_up(&server->request_q);
122
123 if (reconnect_detected) {
124 trace_smb3_reconnect_detected(server->CurrentMid,
125 server->conn_id, server->hostname, scredits, add, in_flight);
126
127 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
128 add, instance);
129 }
130
131 if (reconnect_with_invalid_credits) {
132 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
133 server->conn_id, server->hostname, scredits, add, in_flight);
134 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
135 optype, scredits, add);
136 }
137
138 spin_lock(&server->srv_lock);
139 if (server->tcpStatus == CifsNeedReconnect
140 || server->tcpStatus == CifsExiting) {
141 spin_unlock(&server->srv_lock);
142 return;
143 }
144 spin_unlock(&server->srv_lock);
145
146 switch (rc) {
147 case -1:
148 /* change_conf hasn't been executed */
149 break;
150 case 0:
151 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
152 break;
153 case 1:
154 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
155 break;
156 case 2:
157 cifs_dbg(FYI, "disabling oplocks\n");
158 break;
159 default:
160 /* change_conf rebalanced credits for different types */
161 break;
162 }
163
164 trace_smb3_add_credits(server->CurrentMid,
165 server->conn_id, server->hostname, scredits, add, in_flight);
166 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
167 }
168
169 static void
smb2_set_credits(struct TCP_Server_Info * server,const int val)170 smb2_set_credits(struct TCP_Server_Info *server, const int val)
171 {
172 int scredits, in_flight;
173
174 spin_lock(&server->req_lock);
175 server->credits = val;
176 if (val == 1) {
177 server->reconnect_instance++;
178 /*
179 * ChannelSequence updated for all channels in primary channel so that consistent
180 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
181 */
182 if (SERVER_IS_CHAN(server))
183 server->primary_server->channel_sequence_num++;
184 else
185 server->channel_sequence_num++;
186 }
187 scredits = server->credits;
188 in_flight = server->in_flight;
189 spin_unlock(&server->req_lock);
190
191 trace_smb3_set_credits(server->CurrentMid,
192 server->conn_id, server->hostname, scredits, val, in_flight);
193 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
194
195 /* don't log while holding the lock */
196 if (val == 1)
197 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
198 }
199
200 static int *
smb2_get_credits_field(struct TCP_Server_Info * server,const int optype)201 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
202 {
203 switch (optype) {
204 case CIFS_ECHO_OP:
205 return &server->echo_credits;
206 case CIFS_OBREAK_OP:
207 return &server->oplock_credits;
208 default:
209 return &server->credits;
210 }
211 }
212
213 static unsigned int
smb2_get_credits(struct mid_q_entry * mid)214 smb2_get_credits(struct mid_q_entry *mid)
215 {
216 return mid->credits_received;
217 }
218
219 static int
smb2_wait_mtu_credits(struct TCP_Server_Info * server,unsigned int size,unsigned int * num,struct cifs_credits * credits)220 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
221 unsigned int *num, struct cifs_credits *credits)
222 {
223 int rc = 0;
224 unsigned int scredits, in_flight;
225
226 spin_lock(&server->req_lock);
227 while (1) {
228 spin_unlock(&server->req_lock);
229
230 spin_lock(&server->srv_lock);
231 if (server->tcpStatus == CifsExiting) {
232 spin_unlock(&server->srv_lock);
233 return -ENOENT;
234 }
235 spin_unlock(&server->srv_lock);
236
237 spin_lock(&server->req_lock);
238 if (server->credits <= 0) {
239 spin_unlock(&server->req_lock);
240 cifs_num_waiters_inc(server);
241 rc = wait_event_killable(server->request_q,
242 has_credits(server, &server->credits, 1));
243 cifs_num_waiters_dec(server);
244 if (rc)
245 return rc;
246 spin_lock(&server->req_lock);
247 } else {
248 scredits = server->credits;
249 /* can deadlock with reopen */
250 if (scredits <= 8) {
251 *num = SMB2_MAX_BUFFER_SIZE;
252 credits->value = 0;
253 credits->instance = 0;
254 break;
255 }
256
257 /* leave some credits for reopen and other ops */
258 scredits -= 8;
259 *num = min_t(unsigned int, size,
260 scredits * SMB2_MAX_BUFFER_SIZE);
261
262 credits->value =
263 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
264 credits->instance = server->reconnect_instance;
265 server->credits -= credits->value;
266 server->in_flight++;
267 if (server->in_flight > server->max_in_flight)
268 server->max_in_flight = server->in_flight;
269 break;
270 }
271 }
272 scredits = server->credits;
273 in_flight = server->in_flight;
274 spin_unlock(&server->req_lock);
275
276 trace_smb3_wait_credits(server->CurrentMid,
277 server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
278 cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
279 __func__, credits->value, scredits);
280
281 return rc;
282 }
283
284 static int
smb2_adjust_credits(struct TCP_Server_Info * server,struct cifs_credits * credits,const unsigned int payload_size)285 smb2_adjust_credits(struct TCP_Server_Info *server,
286 struct cifs_credits *credits,
287 const unsigned int payload_size)
288 {
289 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
290 int scredits, in_flight;
291
292 if (!credits->value || credits->value == new_val)
293 return 0;
294
295 if (credits->value < new_val) {
296 trace_smb3_too_many_credits(server->CurrentMid,
297 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
298 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
299 credits->value, new_val);
300
301 return -EOPNOTSUPP;
302 }
303
304 spin_lock(&server->req_lock);
305
306 if (server->reconnect_instance != credits->instance) {
307 scredits = server->credits;
308 in_flight = server->in_flight;
309 spin_unlock(&server->req_lock);
310
311 trace_smb3_reconnect_detected(server->CurrentMid,
312 server->conn_id, server->hostname, scredits,
313 credits->value - new_val, in_flight);
314 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
315 credits->value - new_val);
316 return -EAGAIN;
317 }
318
319 server->credits += credits->value - new_val;
320 scredits = server->credits;
321 in_flight = server->in_flight;
322 spin_unlock(&server->req_lock);
323 wake_up(&server->request_q);
324
325 trace_smb3_adj_credits(server->CurrentMid,
326 server->conn_id, server->hostname, scredits,
327 credits->value - new_val, in_flight);
328 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
329 __func__, credits->value - new_val, scredits);
330
331 credits->value = new_val;
332
333 return 0;
334 }
335
336 static __u64
smb2_get_next_mid(struct TCP_Server_Info * server)337 smb2_get_next_mid(struct TCP_Server_Info *server)
338 {
339 __u64 mid;
340 /* for SMB2 we need the current value */
341 spin_lock(&server->mid_lock);
342 mid = server->CurrentMid++;
343 spin_unlock(&server->mid_lock);
344 return mid;
345 }
346
347 static void
smb2_revert_current_mid(struct TCP_Server_Info * server,const unsigned int val)348 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
349 {
350 spin_lock(&server->mid_lock);
351 if (server->CurrentMid >= val)
352 server->CurrentMid -= val;
353 spin_unlock(&server->mid_lock);
354 }
355
356 static struct mid_q_entry *
__smb2_find_mid(struct TCP_Server_Info * server,char * buf,bool dequeue)357 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
358 {
359 struct mid_q_entry *mid;
360 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
361 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
362
363 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
364 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
365 return NULL;
366 }
367
368 spin_lock(&server->mid_lock);
369 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
370 if ((mid->mid == wire_mid) &&
371 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
372 (mid->command == shdr->Command)) {
373 kref_get(&mid->refcount);
374 if (dequeue) {
375 list_del_init(&mid->qhead);
376 mid->mid_flags |= MID_DELETED;
377 }
378 spin_unlock(&server->mid_lock);
379 return mid;
380 }
381 }
382 spin_unlock(&server->mid_lock);
383 return NULL;
384 }
385
386 static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info * server,char * buf)387 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
388 {
389 return __smb2_find_mid(server, buf, false);
390 }
391
392 static struct mid_q_entry *
smb2_find_dequeue_mid(struct TCP_Server_Info * server,char * buf)393 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
394 {
395 return __smb2_find_mid(server, buf, true);
396 }
397
398 static void
smb2_dump_detail(void * buf,struct TCP_Server_Info * server)399 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
400 {
401 #ifdef CONFIG_CIFS_DEBUG2
402 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
403
404 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
405 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
406 shdr->Id.SyncId.ProcessId);
407 if (!server->ops->check_message(buf, server->total_read, server)) {
408 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
409 server->ops->calc_smb_size(buf));
410 }
411 #endif
412 }
413
414 static bool
smb2_need_neg(struct TCP_Server_Info * server)415 smb2_need_neg(struct TCP_Server_Info *server)
416 {
417 return server->max_read == 0;
418 }
419
420 static int
smb2_negotiate(const unsigned int xid,struct cifs_ses * ses,struct TCP_Server_Info * server)421 smb2_negotiate(const unsigned int xid,
422 struct cifs_ses *ses,
423 struct TCP_Server_Info *server)
424 {
425 int rc;
426
427 spin_lock(&server->mid_lock);
428 server->CurrentMid = 0;
429 spin_unlock(&server->mid_lock);
430 rc = SMB2_negotiate(xid, ses, server);
431 /* BB we probably don't need to retry with modern servers */
432 if (rc == -EAGAIN)
433 rc = -EHOSTDOWN;
434 return rc;
435 }
436
437 static unsigned int
smb2_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)438 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
439 {
440 struct TCP_Server_Info *server = tcon->ses->server;
441 unsigned int wsize;
442
443 /* start with specified wsize, or default */
444 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
445 wsize = min_t(unsigned int, wsize, server->max_write);
446 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
447 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
448
449 return wsize;
450 }
451
452 static unsigned int
smb3_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)453 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
454 {
455 struct TCP_Server_Info *server = tcon->ses->server;
456 unsigned int wsize;
457
458 /* start with specified wsize, or default */
459 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
460 wsize = min_t(unsigned int, wsize, server->max_write);
461 #ifdef CONFIG_CIFS_SMB_DIRECT
462 if (server->rdma) {
463 if (server->sign)
464 /*
465 * Account for SMB2 data transfer packet header and
466 * possible encryption header
467 */
468 wsize = min_t(unsigned int,
469 wsize,
470 server->smbd_conn->max_fragmented_send_size -
471 SMB2_READWRITE_PDU_HEADER_SIZE -
472 sizeof(struct smb2_transform_hdr));
473 else
474 wsize = min_t(unsigned int,
475 wsize, server->smbd_conn->max_readwrite_size);
476 }
477 #endif
478 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
479 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
480
481 return wsize;
482 }
483
484 static unsigned int
smb2_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)485 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
486 {
487 struct TCP_Server_Info *server = tcon->ses->server;
488 unsigned int rsize;
489
490 /* start with specified rsize, or default */
491 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
492 rsize = min_t(unsigned int, rsize, server->max_read);
493
494 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
495 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
496
497 return rsize;
498 }
499
500 static unsigned int
smb3_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)501 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
502 {
503 struct TCP_Server_Info *server = tcon->ses->server;
504 unsigned int rsize;
505
506 /* start with specified rsize, or default */
507 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
508 rsize = min_t(unsigned int, rsize, server->max_read);
509 #ifdef CONFIG_CIFS_SMB_DIRECT
510 if (server->rdma) {
511 if (server->sign)
512 /*
513 * Account for SMB2 data transfer packet header and
514 * possible encryption header
515 */
516 rsize = min_t(unsigned int,
517 rsize,
518 server->smbd_conn->max_fragmented_recv_size -
519 SMB2_READWRITE_PDU_HEADER_SIZE -
520 sizeof(struct smb2_transform_hdr));
521 else
522 rsize = min_t(unsigned int,
523 rsize, server->smbd_conn->max_readwrite_size);
524 }
525 #endif
526
527 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
528 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
529
530 return rsize;
531 }
532
533 /*
534 * compare two interfaces a and b
535 * return 0 if everything matches.
536 * return 1 if a is rdma capable, or rss capable, or has higher link speed
537 * return -1 otherwise.
538 */
539 static int
iface_cmp(struct cifs_server_iface * a,struct cifs_server_iface * b)540 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
541 {
542 int cmp_ret = 0;
543
544 WARN_ON(!a || !b);
545 if (a->rdma_capable == b->rdma_capable) {
546 if (a->rss_capable == b->rss_capable) {
547 if (a->speed == b->speed) {
548 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
549 (struct sockaddr *) &b->sockaddr);
550 if (!cmp_ret)
551 return 0;
552 else if (cmp_ret > 0)
553 return 1;
554 else
555 return -1;
556 } else if (a->speed > b->speed)
557 return 1;
558 else
559 return -1;
560 } else if (a->rss_capable > b->rss_capable)
561 return 1;
562 else
563 return -1;
564 } else if (a->rdma_capable > b->rdma_capable)
565 return 1;
566 else
567 return -1;
568 }
569
570 static int
parse_server_interfaces(struct network_interface_info_ioctl_rsp * buf,size_t buf_len,struct cifs_ses * ses,bool in_mount)571 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
572 size_t buf_len, struct cifs_ses *ses, bool in_mount)
573 {
574 struct network_interface_info_ioctl_rsp *p;
575 struct sockaddr_in *addr4;
576 struct sockaddr_in6 *addr6;
577 struct iface_info_ipv4 *p4;
578 struct iface_info_ipv6 *p6;
579 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
580 struct cifs_server_iface tmp_iface;
581 ssize_t bytes_left;
582 size_t next = 0;
583 int nb_iface = 0;
584 int rc = 0, ret = 0;
585
586 bytes_left = buf_len;
587 p = buf;
588
589 spin_lock(&ses->iface_lock);
590 /* do not query too frequently, this time with lock held */
591 if (ses->iface_last_update &&
592 time_before(jiffies, ses->iface_last_update +
593 (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
594 spin_unlock(&ses->iface_lock);
595 return 0;
596 }
597
598 /*
599 * Go through iface_list and mark them as inactive
600 */
601 list_for_each_entry_safe(iface, niface, &ses->iface_list,
602 iface_head)
603 iface->is_active = 0;
604
605 spin_unlock(&ses->iface_lock);
606
607 /*
608 * Samba server e.g. can return an empty interface list in some cases,
609 * which would only be a problem if we were requesting multichannel
610 */
611 if (bytes_left == 0) {
612 /* avoid spamming logs every 10 minutes, so log only in mount */
613 if ((ses->chan_max > 1) && in_mount)
614 cifs_dbg(VFS,
615 "multichannel not available\n"
616 "Empty network interface list returned by server %s\n",
617 ses->server->hostname);
618 rc = -EOPNOTSUPP;
619 ses->iface_last_update = jiffies;
620 goto out;
621 }
622
623 while (bytes_left >= (ssize_t)sizeof(*p)) {
624 memset(&tmp_iface, 0, sizeof(tmp_iface));
625 /* default to 1Gbps when link speed is unset */
626 tmp_iface.speed = le64_to_cpu(p->LinkSpeed) ?: 1000000000;
627 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
628 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
629
630 switch (p->Family) {
631 /*
632 * The kernel and wire socket structures have the same
633 * layout and use network byte order but make the
634 * conversion explicit in case either one changes.
635 */
636 case INTERNETWORK:
637 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
638 p4 = (struct iface_info_ipv4 *)p->Buffer;
639 addr4->sin_family = AF_INET;
640 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
641
642 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
643 addr4->sin_port = cpu_to_be16(CIFS_PORT);
644
645 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
646 &addr4->sin_addr);
647 break;
648 case INTERNETWORKV6:
649 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
650 p6 = (struct iface_info_ipv6 *)p->Buffer;
651 addr6->sin6_family = AF_INET6;
652 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
653
654 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
655 addr6->sin6_flowinfo = 0;
656 addr6->sin6_scope_id = 0;
657 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
658
659 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
660 &addr6->sin6_addr);
661 break;
662 default:
663 cifs_dbg(VFS,
664 "%s: skipping unsupported socket family\n",
665 __func__);
666 goto next_iface;
667 }
668
669 /*
670 * The iface_list is assumed to be sorted by speed.
671 * Check if the new interface exists in that list.
672 * NEVER change iface. it could be in use.
673 * Add a new one instead
674 */
675 spin_lock(&ses->iface_lock);
676 list_for_each_entry_safe(iface, niface, &ses->iface_list,
677 iface_head) {
678 ret = iface_cmp(iface, &tmp_iface);
679 if (!ret) {
680 iface->is_active = 1;
681 spin_unlock(&ses->iface_lock);
682 goto next_iface;
683 } else if (ret < 0) {
684 /* all remaining ifaces are slower */
685 kref_get(&iface->refcount);
686 break;
687 }
688 }
689 spin_unlock(&ses->iface_lock);
690
691 /* no match. insert the entry in the list */
692 info = kmalloc(sizeof(struct cifs_server_iface),
693 GFP_KERNEL);
694 if (!info) {
695 rc = -ENOMEM;
696 goto out;
697 }
698 memcpy(info, &tmp_iface, sizeof(tmp_iface));
699
700 /* add this new entry to the list */
701 kref_init(&info->refcount);
702 info->is_active = 1;
703
704 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
705 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
706 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
707 le32_to_cpu(p->Capability));
708
709 spin_lock(&ses->iface_lock);
710 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
711 list_add_tail(&info->iface_head, &iface->iface_head);
712 kref_put(&iface->refcount, release_iface);
713 } else
714 list_add_tail(&info->iface_head, &ses->iface_list);
715
716 ses->iface_count++;
717 spin_unlock(&ses->iface_lock);
718 next_iface:
719 nb_iface++;
720 next = le32_to_cpu(p->Next);
721 if (!next) {
722 bytes_left -= sizeof(*p);
723 break;
724 }
725 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
726 bytes_left -= next;
727 }
728
729 if (!nb_iface) {
730 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
731 rc = -EINVAL;
732 goto out;
733 }
734
735 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
736 if ((bytes_left > 8) || p->Next)
737 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
738
739 ses->iface_last_update = jiffies;
740
741 out:
742 /*
743 * Go through the list again and put the inactive entries
744 */
745 spin_lock(&ses->iface_lock);
746 list_for_each_entry_safe(iface, niface, &ses->iface_list,
747 iface_head) {
748 if (!iface->is_active) {
749 list_del(&iface->iface_head);
750 kref_put(&iface->refcount, release_iface);
751 ses->iface_count--;
752 }
753 }
754 spin_unlock(&ses->iface_lock);
755
756 return rc;
757 }
758
759 int
SMB3_request_interfaces(const unsigned int xid,struct cifs_tcon * tcon,bool in_mount)760 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
761 {
762 int rc;
763 unsigned int ret_data_len = 0;
764 struct network_interface_info_ioctl_rsp *out_buf = NULL;
765 struct cifs_ses *ses = tcon->ses;
766 struct TCP_Server_Info *pserver;
767
768 /* do not query too frequently */
769 if (ses->iface_last_update &&
770 time_before(jiffies, ses->iface_last_update +
771 (SMB_INTERFACE_POLL_INTERVAL * HZ)))
772 return 0;
773
774 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
775 FSCTL_QUERY_NETWORK_INTERFACE_INFO,
776 NULL /* no data input */, 0 /* no data input */,
777 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
778 if (rc == -EOPNOTSUPP) {
779 cifs_dbg(FYI,
780 "server does not support query network interfaces\n");
781 ret_data_len = 0;
782 } else if (rc != 0) {
783 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
784 goto out;
785 }
786
787 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
788 if (rc)
789 goto out;
790
791 /* check if iface is still active */
792 spin_lock(&ses->chan_lock);
793 pserver = ses->chans[0].server;
794 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
795 spin_unlock(&ses->chan_lock);
796 cifs_chan_update_iface(ses, pserver);
797 spin_lock(&ses->chan_lock);
798 }
799 spin_unlock(&ses->chan_lock);
800
801 out:
802 kfree(out_buf);
803 return rc;
804 }
805
806 static void
smb3_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)807 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
808 struct cifs_sb_info *cifs_sb)
809 {
810 int rc;
811 __le16 srch_path = 0; /* Null - open root of share */
812 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
813 struct cifs_open_parms oparms;
814 struct cifs_fid fid;
815 struct cached_fid *cfid = NULL;
816
817 oparms = (struct cifs_open_parms) {
818 .tcon = tcon,
819 .path = "",
820 .desired_access = FILE_READ_ATTRIBUTES,
821 .disposition = FILE_OPEN,
822 .create_options = cifs_create_options(cifs_sb, 0),
823 .fid = &fid,
824 };
825
826 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
827 if (rc == 0)
828 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
829 else
830 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
831 NULL, NULL);
832 if (rc)
833 return;
834
835 SMB3_request_interfaces(xid, tcon, true /* called during mount */);
836
837 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
838 FS_ATTRIBUTE_INFORMATION);
839 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
840 FS_DEVICE_INFORMATION);
841 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
842 FS_VOLUME_INFORMATION);
843 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
844 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
845 if (cfid == NULL)
846 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
847 else
848 close_cached_dir(cfid);
849 }
850
851 static void
smb2_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)852 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
853 struct cifs_sb_info *cifs_sb)
854 {
855 int rc;
856 __le16 srch_path = 0; /* Null - open root of share */
857 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
858 struct cifs_open_parms oparms;
859 struct cifs_fid fid;
860
861 oparms = (struct cifs_open_parms) {
862 .tcon = tcon,
863 .path = "",
864 .desired_access = FILE_READ_ATTRIBUTES,
865 .disposition = FILE_OPEN,
866 .create_options = cifs_create_options(cifs_sb, 0),
867 .fid = &fid,
868 };
869
870 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
871 NULL, NULL);
872 if (rc)
873 return;
874
875 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
876 FS_ATTRIBUTE_INFORMATION);
877 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
878 FS_DEVICE_INFORMATION);
879 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
880 }
881
882 static int
smb2_is_path_accessible(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path)883 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
884 struct cifs_sb_info *cifs_sb, const char *full_path)
885 {
886 __le16 *utf16_path;
887 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
888 int err_buftype = CIFS_NO_BUFFER;
889 struct cifs_open_parms oparms;
890 struct kvec err_iov = {};
891 struct cifs_fid fid;
892 struct cached_fid *cfid;
893 bool islink;
894 int rc, rc2;
895
896 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
897 if (!rc) {
898 if (cfid->has_lease) {
899 close_cached_dir(cfid);
900 return 0;
901 }
902 close_cached_dir(cfid);
903 }
904
905 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
906 if (!utf16_path)
907 return -ENOMEM;
908
909 oparms = (struct cifs_open_parms) {
910 .tcon = tcon,
911 .path = full_path,
912 .desired_access = FILE_READ_ATTRIBUTES,
913 .disposition = FILE_OPEN,
914 .create_options = cifs_create_options(cifs_sb, 0),
915 .fid = &fid,
916 };
917
918 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
919 &err_iov, &err_buftype);
920 if (rc) {
921 struct smb2_hdr *hdr = err_iov.iov_base;
922
923 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
924 goto out;
925
926 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
927 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
928 full_path, &islink);
929 if (rc2) {
930 rc = rc2;
931 goto out;
932 }
933 if (islink)
934 rc = -EREMOTE;
935 }
936 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
937 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
938 rc = -EOPNOTSUPP;
939 goto out;
940 }
941
942 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
943
944 out:
945 free_rsp_buf(err_buftype, err_iov.iov_base);
946 kfree(utf16_path);
947 return rc;
948 }
949
smb2_get_srv_inum(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u64 * uniqueid,struct cifs_open_info_data * data)950 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
951 struct cifs_sb_info *cifs_sb, const char *full_path,
952 u64 *uniqueid, struct cifs_open_info_data *data)
953 {
954 *uniqueid = le64_to_cpu(data->fi.IndexNumber);
955 return 0;
956 }
957
smb2_query_file_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct cifs_open_info_data * data)958 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
959 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
960 {
961 struct cifs_fid *fid = &cfile->fid;
962
963 if (cfile->symlink_target) {
964 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
965 if (!data->symlink_target)
966 return -ENOMEM;
967 }
968 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
969 }
970
971 #ifdef CONFIG_CIFS_XATTR
972 static ssize_t
move_smb2_ea_to_cifs(char * dst,size_t dst_size,struct smb2_file_full_ea_info * src,size_t src_size,const unsigned char * ea_name)973 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
974 struct smb2_file_full_ea_info *src, size_t src_size,
975 const unsigned char *ea_name)
976 {
977 int rc = 0;
978 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
979 char *name, *value;
980 size_t buf_size = dst_size;
981 size_t name_len, value_len, user_name_len;
982
983 while (src_size > 0) {
984 name_len = (size_t)src->ea_name_length;
985 value_len = (size_t)le16_to_cpu(src->ea_value_length);
986
987 if (name_len == 0)
988 break;
989
990 if (src_size < 8 + name_len + 1 + value_len) {
991 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
992 rc = -EIO;
993 goto out;
994 }
995
996 name = &src->ea_data[0];
997 value = &src->ea_data[src->ea_name_length + 1];
998
999 if (ea_name) {
1000 if (ea_name_len == name_len &&
1001 memcmp(ea_name, name, name_len) == 0) {
1002 rc = value_len;
1003 if (dst_size == 0)
1004 goto out;
1005 if (dst_size < value_len) {
1006 rc = -ERANGE;
1007 goto out;
1008 }
1009 memcpy(dst, value, value_len);
1010 goto out;
1011 }
1012 } else {
1013 /* 'user.' plus a terminating null */
1014 user_name_len = 5 + 1 + name_len;
1015
1016 if (buf_size == 0) {
1017 /* skip copy - calc size only */
1018 rc += user_name_len;
1019 } else if (dst_size >= user_name_len) {
1020 dst_size -= user_name_len;
1021 memcpy(dst, "user.", 5);
1022 dst += 5;
1023 memcpy(dst, src->ea_data, name_len);
1024 dst += name_len;
1025 *dst = 0;
1026 ++dst;
1027 rc += user_name_len;
1028 } else {
1029 /* stop before overrun buffer */
1030 rc = -ERANGE;
1031 break;
1032 }
1033 }
1034
1035 if (!src->next_entry_offset)
1036 break;
1037
1038 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1039 /* stop before overrun buffer */
1040 rc = -ERANGE;
1041 break;
1042 }
1043 src_size -= le32_to_cpu(src->next_entry_offset);
1044 src = (void *)((char *)src +
1045 le32_to_cpu(src->next_entry_offset));
1046 }
1047
1048 /* didn't find the named attribute */
1049 if (ea_name)
1050 rc = -ENODATA;
1051
1052 out:
1053 return (ssize_t)rc;
1054 }
1055
1056 static ssize_t
smb2_query_eas(const unsigned int xid,struct cifs_tcon * tcon,const unsigned char * path,const unsigned char * ea_name,char * ea_data,size_t buf_size,struct cifs_sb_info * cifs_sb)1057 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1058 const unsigned char *path, const unsigned char *ea_name,
1059 char *ea_data, size_t buf_size,
1060 struct cifs_sb_info *cifs_sb)
1061 {
1062 int rc;
1063 struct kvec rsp_iov = {NULL, 0};
1064 int buftype = CIFS_NO_BUFFER;
1065 struct smb2_query_info_rsp *rsp;
1066 struct smb2_file_full_ea_info *info = NULL;
1067
1068 rc = smb2_query_info_compound(xid, tcon, path,
1069 FILE_READ_EA,
1070 FILE_FULL_EA_INFORMATION,
1071 SMB2_O_INFO_FILE,
1072 CIFSMaxBufSize -
1073 MAX_SMB2_CREATE_RESPONSE_SIZE -
1074 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1075 &rsp_iov, &buftype, cifs_sb);
1076 if (rc) {
1077 /*
1078 * If ea_name is NULL (listxattr) and there are no EAs,
1079 * return 0 as it's not an error. Otherwise, the specified
1080 * ea_name was not found.
1081 */
1082 if (!ea_name && rc == -ENODATA)
1083 rc = 0;
1084 goto qeas_exit;
1085 }
1086
1087 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1088 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1089 le32_to_cpu(rsp->OutputBufferLength),
1090 &rsp_iov,
1091 sizeof(struct smb2_file_full_ea_info));
1092 if (rc)
1093 goto qeas_exit;
1094
1095 info = (struct smb2_file_full_ea_info *)(
1096 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1097 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1098 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1099
1100 qeas_exit:
1101 free_rsp_buf(buftype, rsp_iov.iov_base);
1102 return rc;
1103 }
1104
1105 static int
smb2_set_ea(const unsigned int xid,struct cifs_tcon * tcon,const char * path,const char * ea_name,const void * ea_value,const __u16 ea_value_len,const struct nls_table * nls_codepage,struct cifs_sb_info * cifs_sb)1106 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1107 const char *path, const char *ea_name, const void *ea_value,
1108 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1109 struct cifs_sb_info *cifs_sb)
1110 {
1111 struct smb2_compound_vars *vars;
1112 struct cifs_ses *ses = tcon->ses;
1113 struct TCP_Server_Info *server;
1114 struct smb_rqst *rqst;
1115 struct kvec *rsp_iov;
1116 __le16 *utf16_path = NULL;
1117 int ea_name_len = strlen(ea_name);
1118 int flags = CIFS_CP_CREATE_CLOSE_OP;
1119 int len;
1120 int resp_buftype[3];
1121 struct cifs_open_parms oparms;
1122 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1123 struct cifs_fid fid;
1124 unsigned int size[1];
1125 void *data[1];
1126 struct smb2_file_full_ea_info *ea;
1127 struct smb2_query_info_rsp *rsp;
1128 int rc, used_len = 0;
1129 int retries = 0, cur_sleep = 1;
1130
1131 replay_again:
1132 /* reinitialize for possible replay */
1133 flags = CIFS_CP_CREATE_CLOSE_OP;
1134 oplock = SMB2_OPLOCK_LEVEL_NONE;
1135 server = cifs_pick_channel(ses);
1136
1137 if (smb3_encryption_required(tcon))
1138 flags |= CIFS_TRANSFORM_REQ;
1139
1140 if (ea_name_len > 255)
1141 return -EINVAL;
1142
1143 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1144 if (!utf16_path)
1145 return -ENOMEM;
1146
1147 ea = NULL;
1148 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1149 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1150 if (!vars) {
1151 rc = -ENOMEM;
1152 goto out_free_path;
1153 }
1154 rqst = vars->rqst;
1155 rsp_iov = vars->rsp_iov;
1156
1157 if (ses->server->ops->query_all_EAs) {
1158 if (!ea_value) {
1159 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1160 ea_name, NULL, 0,
1161 cifs_sb);
1162 if (rc == -ENODATA)
1163 goto sea_exit;
1164 } else {
1165 /* If we are adding a attribute we should first check
1166 * if there will be enough space available to store
1167 * the new EA. If not we should not add it since we
1168 * would not be able to even read the EAs back.
1169 */
1170 rc = smb2_query_info_compound(xid, tcon, path,
1171 FILE_READ_EA,
1172 FILE_FULL_EA_INFORMATION,
1173 SMB2_O_INFO_FILE,
1174 CIFSMaxBufSize -
1175 MAX_SMB2_CREATE_RESPONSE_SIZE -
1176 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1177 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1178 if (rc == 0) {
1179 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1180 used_len = le32_to_cpu(rsp->OutputBufferLength);
1181 }
1182 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1183 resp_buftype[1] = CIFS_NO_BUFFER;
1184 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1185 rc = 0;
1186
1187 /* Use a fudge factor of 256 bytes in case we collide
1188 * with a different set_EAs command.
1189 */
1190 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1191 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1192 used_len + ea_name_len + ea_value_len + 1) {
1193 rc = -ENOSPC;
1194 goto sea_exit;
1195 }
1196 }
1197 }
1198
1199 /* Open */
1200 rqst[0].rq_iov = vars->open_iov;
1201 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1202
1203 oparms = (struct cifs_open_parms) {
1204 .tcon = tcon,
1205 .path = path,
1206 .desired_access = FILE_WRITE_EA,
1207 .disposition = FILE_OPEN,
1208 .create_options = cifs_create_options(cifs_sb, 0),
1209 .fid = &fid,
1210 .replay = !!(retries),
1211 };
1212
1213 rc = SMB2_open_init(tcon, server,
1214 &rqst[0], &oplock, &oparms, utf16_path);
1215 if (rc)
1216 goto sea_exit;
1217 smb2_set_next_command(tcon, &rqst[0]);
1218
1219
1220 /* Set Info */
1221 rqst[1].rq_iov = vars->si_iov;
1222 rqst[1].rq_nvec = 1;
1223
1224 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1225 ea = kzalloc(len, GFP_KERNEL);
1226 if (ea == NULL) {
1227 rc = -ENOMEM;
1228 goto sea_exit;
1229 }
1230
1231 ea->ea_name_length = ea_name_len;
1232 ea->ea_value_length = cpu_to_le16(ea_value_len);
1233 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1234 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1235
1236 size[0] = len;
1237 data[0] = ea;
1238
1239 rc = SMB2_set_info_init(tcon, server,
1240 &rqst[1], COMPOUND_FID,
1241 COMPOUND_FID, current->tgid,
1242 FILE_FULL_EA_INFORMATION,
1243 SMB2_O_INFO_FILE, 0, data, size);
1244 if (rc)
1245 goto sea_exit;
1246 smb2_set_next_command(tcon, &rqst[1]);
1247 smb2_set_related(&rqst[1]);
1248
1249 /* Close */
1250 rqst[2].rq_iov = &vars->close_iov;
1251 rqst[2].rq_nvec = 1;
1252 rc = SMB2_close_init(tcon, server,
1253 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1254 if (rc)
1255 goto sea_exit;
1256 smb2_set_related(&rqst[2]);
1257
1258 if (retries) {
1259 smb2_set_replay(server, &rqst[0]);
1260 smb2_set_replay(server, &rqst[1]);
1261 smb2_set_replay(server, &rqst[2]);
1262 }
1263
1264 rc = compound_send_recv(xid, ses, server,
1265 flags, 3, rqst,
1266 resp_buftype, rsp_iov);
1267 /* no need to bump num_remote_opens because handle immediately closed */
1268
1269 sea_exit:
1270 kfree(ea);
1271 SMB2_open_free(&rqst[0]);
1272 SMB2_set_info_free(&rqst[1]);
1273 SMB2_close_free(&rqst[2]);
1274 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1275 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1276 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1277 kfree(vars);
1278 out_free_path:
1279 kfree(utf16_path);
1280
1281 if (is_replayable_error(rc) &&
1282 smb2_should_replay(tcon, &retries, &cur_sleep))
1283 goto replay_again;
1284
1285 return rc;
1286 }
1287 #endif
1288
1289 static bool
smb2_can_echo(struct TCP_Server_Info * server)1290 smb2_can_echo(struct TCP_Server_Info *server)
1291 {
1292 return server->echoes;
1293 }
1294
1295 static void
smb2_clear_stats(struct cifs_tcon * tcon)1296 smb2_clear_stats(struct cifs_tcon *tcon)
1297 {
1298 int i;
1299
1300 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1301 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1302 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1303 }
1304 }
1305
1306 static void
smb2_dump_share_caps(struct seq_file * m,struct cifs_tcon * tcon)1307 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1308 {
1309 seq_puts(m, "\n\tShare Capabilities:");
1310 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1311 seq_puts(m, " DFS,");
1312 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1313 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1314 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1315 seq_puts(m, " SCALEOUT,");
1316 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1317 seq_puts(m, " CLUSTER,");
1318 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1319 seq_puts(m, " ASYMMETRIC,");
1320 if (tcon->capabilities == 0)
1321 seq_puts(m, " None");
1322 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1323 seq_puts(m, " Aligned,");
1324 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1325 seq_puts(m, " Partition Aligned,");
1326 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1327 seq_puts(m, " SSD,");
1328 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1329 seq_puts(m, " TRIM-support,");
1330
1331 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1332 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1333 if (tcon->perf_sector_size)
1334 seq_printf(m, "\tOptimal sector size: 0x%x",
1335 tcon->perf_sector_size);
1336 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1337 }
1338
1339 static void
smb2_print_stats(struct seq_file * m,struct cifs_tcon * tcon)1340 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1341 {
1342 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1343 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1344
1345 /*
1346 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1347 * totals (requests sent) since those SMBs are per-session not per tcon
1348 */
1349 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1350 (long long)(tcon->bytes_read),
1351 (long long)(tcon->bytes_written));
1352 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1353 atomic_read(&tcon->num_local_opens),
1354 atomic_read(&tcon->num_remote_opens));
1355 seq_printf(m, "\nTreeConnects: %d total %d failed",
1356 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1357 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1358 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1359 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1360 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1361 seq_printf(m, "\nCreates: %d total %d failed",
1362 atomic_read(&sent[SMB2_CREATE_HE]),
1363 atomic_read(&failed[SMB2_CREATE_HE]));
1364 seq_printf(m, "\nCloses: %d total %d failed",
1365 atomic_read(&sent[SMB2_CLOSE_HE]),
1366 atomic_read(&failed[SMB2_CLOSE_HE]));
1367 seq_printf(m, "\nFlushes: %d total %d failed",
1368 atomic_read(&sent[SMB2_FLUSH_HE]),
1369 atomic_read(&failed[SMB2_FLUSH_HE]));
1370 seq_printf(m, "\nReads: %d total %d failed",
1371 atomic_read(&sent[SMB2_READ_HE]),
1372 atomic_read(&failed[SMB2_READ_HE]));
1373 seq_printf(m, "\nWrites: %d total %d failed",
1374 atomic_read(&sent[SMB2_WRITE_HE]),
1375 atomic_read(&failed[SMB2_WRITE_HE]));
1376 seq_printf(m, "\nLocks: %d total %d failed",
1377 atomic_read(&sent[SMB2_LOCK_HE]),
1378 atomic_read(&failed[SMB2_LOCK_HE]));
1379 seq_printf(m, "\nIOCTLs: %d total %d failed",
1380 atomic_read(&sent[SMB2_IOCTL_HE]),
1381 atomic_read(&failed[SMB2_IOCTL_HE]));
1382 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1383 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1384 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1385 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1386 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1387 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1388 seq_printf(m, "\nQueryInfos: %d total %d failed",
1389 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1390 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1391 seq_printf(m, "\nSetInfos: %d total %d failed",
1392 atomic_read(&sent[SMB2_SET_INFO_HE]),
1393 atomic_read(&failed[SMB2_SET_INFO_HE]));
1394 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1395 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1396 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1397 }
1398
1399 static void
smb2_set_fid(struct cifsFileInfo * cfile,struct cifs_fid * fid,__u32 oplock)1400 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1401 {
1402 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1403 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1404
1405 cfile->fid.persistent_fid = fid->persistent_fid;
1406 cfile->fid.volatile_fid = fid->volatile_fid;
1407 cfile->fid.access = fid->access;
1408 #ifdef CONFIG_CIFS_DEBUG2
1409 cfile->fid.mid = fid->mid;
1410 #endif /* CIFS_DEBUG2 */
1411 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1412 &fid->purge_cache);
1413 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1414 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1415 }
1416
1417 static int
smb2_close_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1418 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1419 struct cifs_fid *fid)
1420 {
1421 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1422 }
1423
1424 static int
smb2_close_getattr(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)1425 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1426 struct cifsFileInfo *cfile)
1427 {
1428 struct smb2_file_network_open_info file_inf;
1429 struct inode *inode;
1430 int rc;
1431
1432 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1433 cfile->fid.volatile_fid, &file_inf);
1434 if (rc)
1435 return rc;
1436
1437 inode = d_inode(cfile->dentry);
1438
1439 spin_lock(&inode->i_lock);
1440 CIFS_I(inode)->time = jiffies;
1441
1442 /* Creation time should not need to be updated on close */
1443 if (file_inf.LastWriteTime)
1444 inode_set_mtime_to_ts(inode,
1445 cifs_NTtimeToUnix(file_inf.LastWriteTime));
1446 if (file_inf.ChangeTime)
1447 inode_set_ctime_to_ts(inode,
1448 cifs_NTtimeToUnix(file_inf.ChangeTime));
1449 if (file_inf.LastAccessTime)
1450 inode_set_atime_to_ts(inode,
1451 cifs_NTtimeToUnix(file_inf.LastAccessTime));
1452
1453 /*
1454 * i_blocks is not related to (i_size / i_blksize),
1455 * but instead 512 byte (2**9) size is required for
1456 * calculating num blocks.
1457 */
1458 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1459 inode->i_blocks =
1460 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1461
1462 /* End of file and Attributes should not have to be updated on close */
1463 spin_unlock(&inode->i_lock);
1464 return rc;
1465 }
1466
1467 static int
SMB2_request_res_key(const unsigned int xid,struct cifs_tcon * tcon,u64 persistent_fid,u64 volatile_fid,struct copychunk_ioctl * pcchunk)1468 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1469 u64 persistent_fid, u64 volatile_fid,
1470 struct copychunk_ioctl *pcchunk)
1471 {
1472 int rc;
1473 unsigned int ret_data_len;
1474 struct resume_key_req *res_key;
1475
1476 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1477 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1478 CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1479
1480 if (rc == -EOPNOTSUPP) {
1481 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1482 goto req_res_key_exit;
1483 } else if (rc) {
1484 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1485 goto req_res_key_exit;
1486 }
1487 if (ret_data_len < sizeof(struct resume_key_req)) {
1488 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1489 rc = -EINVAL;
1490 goto req_res_key_exit;
1491 }
1492 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1493
1494 req_res_key_exit:
1495 kfree(res_key);
1496 return rc;
1497 }
1498
1499 static int
smb2_ioctl_query_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,__le16 * path,int is_dir,unsigned long p)1500 smb2_ioctl_query_info(const unsigned int xid,
1501 struct cifs_tcon *tcon,
1502 struct cifs_sb_info *cifs_sb,
1503 __le16 *path, int is_dir,
1504 unsigned long p)
1505 {
1506 struct smb2_compound_vars *vars;
1507 struct smb_rqst *rqst;
1508 struct kvec *rsp_iov;
1509 struct cifs_ses *ses = tcon->ses;
1510 struct TCP_Server_Info *server;
1511 char __user *arg = (char __user *)p;
1512 struct smb_query_info qi;
1513 struct smb_query_info __user *pqi;
1514 int rc = 0;
1515 int flags = CIFS_CP_CREATE_CLOSE_OP;
1516 struct smb2_query_info_rsp *qi_rsp = NULL;
1517 struct smb2_ioctl_rsp *io_rsp = NULL;
1518 void *buffer = NULL;
1519 int resp_buftype[3];
1520 struct cifs_open_parms oparms;
1521 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1522 struct cifs_fid fid;
1523 unsigned int size[2];
1524 void *data[2];
1525 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1526 void (*free_req1_func)(struct smb_rqst *r);
1527 int retries = 0, cur_sleep = 1;
1528
1529 replay_again:
1530 /* reinitialize for possible replay */
1531 flags = CIFS_CP_CREATE_CLOSE_OP;
1532 oplock = SMB2_OPLOCK_LEVEL_NONE;
1533 server = cifs_pick_channel(ses);
1534
1535 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1536 if (vars == NULL)
1537 return -ENOMEM;
1538 rqst = &vars->rqst[0];
1539 rsp_iov = &vars->rsp_iov[0];
1540
1541 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1542
1543 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1544 rc = -EFAULT;
1545 goto free_vars;
1546 }
1547 if (qi.output_buffer_length > 1024) {
1548 rc = -EINVAL;
1549 goto free_vars;
1550 }
1551
1552 if (!ses || !server) {
1553 rc = -EIO;
1554 goto free_vars;
1555 }
1556
1557 if (smb3_encryption_required(tcon))
1558 flags |= CIFS_TRANSFORM_REQ;
1559
1560 if (qi.output_buffer_length) {
1561 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1562 if (IS_ERR(buffer)) {
1563 rc = PTR_ERR(buffer);
1564 goto free_vars;
1565 }
1566 }
1567
1568 /* Open */
1569 rqst[0].rq_iov = &vars->open_iov[0];
1570 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1571
1572 oparms = (struct cifs_open_parms) {
1573 .tcon = tcon,
1574 .disposition = FILE_OPEN,
1575 .create_options = cifs_create_options(cifs_sb, create_options),
1576 .fid = &fid,
1577 .replay = !!(retries),
1578 };
1579
1580 if (qi.flags & PASSTHRU_FSCTL) {
1581 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1582 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1583 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1584 break;
1585 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1586 oparms.desired_access = GENERIC_ALL;
1587 break;
1588 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1589 oparms.desired_access = GENERIC_READ;
1590 break;
1591 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1592 oparms.desired_access = GENERIC_WRITE;
1593 break;
1594 }
1595 } else if (qi.flags & PASSTHRU_SET_INFO) {
1596 oparms.desired_access = GENERIC_WRITE;
1597 } else {
1598 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1599 }
1600
1601 rc = SMB2_open_init(tcon, server,
1602 &rqst[0], &oplock, &oparms, path);
1603 if (rc)
1604 goto free_output_buffer;
1605 smb2_set_next_command(tcon, &rqst[0]);
1606
1607 /* Query */
1608 if (qi.flags & PASSTHRU_FSCTL) {
1609 /* Can eventually relax perm check since server enforces too */
1610 if (!capable(CAP_SYS_ADMIN)) {
1611 rc = -EPERM;
1612 goto free_open_req;
1613 }
1614 rqst[1].rq_iov = &vars->io_iov[0];
1615 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1616
1617 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1618 qi.info_type, buffer, qi.output_buffer_length,
1619 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1620 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1621 free_req1_func = SMB2_ioctl_free;
1622 } else if (qi.flags == PASSTHRU_SET_INFO) {
1623 /* Can eventually relax perm check since server enforces too */
1624 if (!capable(CAP_SYS_ADMIN)) {
1625 rc = -EPERM;
1626 goto free_open_req;
1627 }
1628 if (qi.output_buffer_length < 8) {
1629 rc = -EINVAL;
1630 goto free_open_req;
1631 }
1632 rqst[1].rq_iov = vars->si_iov;
1633 rqst[1].rq_nvec = 1;
1634
1635 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1636 size[0] = 8;
1637 data[0] = buffer;
1638
1639 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1640 current->tgid, FILE_END_OF_FILE_INFORMATION,
1641 SMB2_O_INFO_FILE, 0, data, size);
1642 free_req1_func = SMB2_set_info_free;
1643 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1644 rqst[1].rq_iov = &vars->qi_iov;
1645 rqst[1].rq_nvec = 1;
1646
1647 rc = SMB2_query_info_init(tcon, server,
1648 &rqst[1], COMPOUND_FID,
1649 COMPOUND_FID, qi.file_info_class,
1650 qi.info_type, qi.additional_information,
1651 qi.input_buffer_length,
1652 qi.output_buffer_length, buffer);
1653 free_req1_func = SMB2_query_info_free;
1654 } else { /* unknown flags */
1655 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1656 qi.flags);
1657 rc = -EINVAL;
1658 }
1659
1660 if (rc)
1661 goto free_open_req;
1662 smb2_set_next_command(tcon, &rqst[1]);
1663 smb2_set_related(&rqst[1]);
1664
1665 /* Close */
1666 rqst[2].rq_iov = &vars->close_iov;
1667 rqst[2].rq_nvec = 1;
1668
1669 rc = SMB2_close_init(tcon, server,
1670 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1671 if (rc)
1672 goto free_req_1;
1673 smb2_set_related(&rqst[2]);
1674
1675 if (retries) {
1676 smb2_set_replay(server, &rqst[0]);
1677 smb2_set_replay(server, &rqst[1]);
1678 smb2_set_replay(server, &rqst[2]);
1679 }
1680
1681 rc = compound_send_recv(xid, ses, server,
1682 flags, 3, rqst,
1683 resp_buftype, rsp_iov);
1684 if (rc)
1685 goto out;
1686
1687 /* No need to bump num_remote_opens since handle immediately closed */
1688 if (qi.flags & PASSTHRU_FSCTL) {
1689 pqi = (struct smb_query_info __user *)arg;
1690 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1691 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1692 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1693 if (qi.input_buffer_length > 0 &&
1694 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1695 > rsp_iov[1].iov_len) {
1696 rc = -EFAULT;
1697 goto out;
1698 }
1699
1700 if (copy_to_user(&pqi->input_buffer_length,
1701 &qi.input_buffer_length,
1702 sizeof(qi.input_buffer_length))) {
1703 rc = -EFAULT;
1704 goto out;
1705 }
1706
1707 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1708 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1709 qi.input_buffer_length))
1710 rc = -EFAULT;
1711 } else {
1712 pqi = (struct smb_query_info __user *)arg;
1713 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1714 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1715 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1716 if (copy_to_user(&pqi->input_buffer_length,
1717 &qi.input_buffer_length,
1718 sizeof(qi.input_buffer_length))) {
1719 rc = -EFAULT;
1720 goto out;
1721 }
1722
1723 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1724 qi.input_buffer_length))
1725 rc = -EFAULT;
1726 }
1727
1728 out:
1729 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1730 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1731 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1732 SMB2_close_free(&rqst[2]);
1733 free_req_1:
1734 free_req1_func(&rqst[1]);
1735 free_open_req:
1736 SMB2_open_free(&rqst[0]);
1737 free_output_buffer:
1738 kfree(buffer);
1739 free_vars:
1740 kfree(vars);
1741
1742 if (is_replayable_error(rc) &&
1743 smb2_should_replay(tcon, &retries, &cur_sleep))
1744 goto replay_again;
1745
1746 return rc;
1747 }
1748
1749 static ssize_t
smb2_copychunk_range(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1750 smb2_copychunk_range(const unsigned int xid,
1751 struct cifsFileInfo *srcfile,
1752 struct cifsFileInfo *trgtfile, u64 src_off,
1753 u64 len, u64 dest_off)
1754 {
1755 int rc;
1756 unsigned int ret_data_len;
1757 struct copychunk_ioctl *pcchunk;
1758 struct copychunk_ioctl_rsp *retbuf = NULL;
1759 struct cifs_tcon *tcon;
1760 int chunks_copied = 0;
1761 bool chunk_sizes_updated = false;
1762 ssize_t bytes_written, total_bytes_written = 0;
1763
1764 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1765 if (pcchunk == NULL)
1766 return -ENOMEM;
1767
1768 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1769 /* Request a key from the server to identify the source of the copy */
1770 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1771 srcfile->fid.persistent_fid,
1772 srcfile->fid.volatile_fid, pcchunk);
1773
1774 /* Note: request_res_key sets res_key null only if rc !=0 */
1775 if (rc)
1776 goto cchunk_out;
1777
1778 /* For now array only one chunk long, will make more flexible later */
1779 pcchunk->ChunkCount = cpu_to_le32(1);
1780 pcchunk->Reserved = 0;
1781 pcchunk->Reserved2 = 0;
1782
1783 tcon = tlink_tcon(trgtfile->tlink);
1784
1785 while (len > 0) {
1786 pcchunk->SourceOffset = cpu_to_le64(src_off);
1787 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1788 pcchunk->Length =
1789 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1790
1791 /* Request server copy to target from src identified by key */
1792 kfree(retbuf);
1793 retbuf = NULL;
1794 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1795 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1796 (char *)pcchunk, sizeof(struct copychunk_ioctl),
1797 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1798 if (rc == 0) {
1799 if (ret_data_len !=
1800 sizeof(struct copychunk_ioctl_rsp)) {
1801 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1802 rc = -EIO;
1803 goto cchunk_out;
1804 }
1805 if (retbuf->TotalBytesWritten == 0) {
1806 cifs_dbg(FYI, "no bytes copied\n");
1807 rc = -EIO;
1808 goto cchunk_out;
1809 }
1810 /*
1811 * Check if server claimed to write more than we asked
1812 */
1813 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1814 le32_to_cpu(pcchunk->Length)) {
1815 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1816 rc = -EIO;
1817 goto cchunk_out;
1818 }
1819 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1820 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1821 rc = -EIO;
1822 goto cchunk_out;
1823 }
1824 chunks_copied++;
1825
1826 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1827 src_off += bytes_written;
1828 dest_off += bytes_written;
1829 len -= bytes_written;
1830 total_bytes_written += bytes_written;
1831
1832 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1833 le32_to_cpu(retbuf->ChunksWritten),
1834 le32_to_cpu(retbuf->ChunkBytesWritten),
1835 bytes_written);
1836 } else if (rc == -EINVAL) {
1837 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1838 goto cchunk_out;
1839
1840 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1841 le32_to_cpu(retbuf->ChunksWritten),
1842 le32_to_cpu(retbuf->ChunkBytesWritten),
1843 le32_to_cpu(retbuf->TotalBytesWritten));
1844
1845 /*
1846 * Check if this is the first request using these sizes,
1847 * (ie check if copy succeed once with original sizes
1848 * and check if the server gave us different sizes after
1849 * we already updated max sizes on previous request).
1850 * if not then why is the server returning an error now
1851 */
1852 if ((chunks_copied != 0) || chunk_sizes_updated)
1853 goto cchunk_out;
1854
1855 /* Check that server is not asking us to grow size */
1856 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1857 tcon->max_bytes_chunk)
1858 tcon->max_bytes_chunk =
1859 le32_to_cpu(retbuf->ChunkBytesWritten);
1860 else
1861 goto cchunk_out; /* server gave us bogus size */
1862
1863 /* No need to change MaxChunks since already set to 1 */
1864 chunk_sizes_updated = true;
1865 } else
1866 goto cchunk_out;
1867 }
1868
1869 cchunk_out:
1870 kfree(pcchunk);
1871 kfree(retbuf);
1872 if (rc)
1873 return rc;
1874 else
1875 return total_bytes_written;
1876 }
1877
1878 static int
smb2_flush_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1879 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1880 struct cifs_fid *fid)
1881 {
1882 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1883 }
1884
1885 static unsigned int
smb2_read_data_offset(char * buf)1886 smb2_read_data_offset(char *buf)
1887 {
1888 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1889
1890 return rsp->DataOffset;
1891 }
1892
1893 static unsigned int
smb2_read_data_length(char * buf,bool in_remaining)1894 smb2_read_data_length(char *buf, bool in_remaining)
1895 {
1896 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1897
1898 if (in_remaining)
1899 return le32_to_cpu(rsp->DataRemaining);
1900
1901 return le32_to_cpu(rsp->DataLength);
1902 }
1903
1904
1905 static int
smb2_sync_read(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * bytes_read,char ** buf,int * buf_type)1906 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1907 struct cifs_io_parms *parms, unsigned int *bytes_read,
1908 char **buf, int *buf_type)
1909 {
1910 parms->persistent_fid = pfid->persistent_fid;
1911 parms->volatile_fid = pfid->volatile_fid;
1912 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1913 }
1914
1915 static int
smb2_sync_write(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * written,struct kvec * iov,unsigned long nr_segs)1916 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1917 struct cifs_io_parms *parms, unsigned int *written,
1918 struct kvec *iov, unsigned long nr_segs)
1919 {
1920
1921 parms->persistent_fid = pfid->persistent_fid;
1922 parms->volatile_fid = pfid->volatile_fid;
1923 return SMB2_write(xid, parms, written, iov, nr_segs);
1924 }
1925
1926 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
smb2_set_sparse(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct inode * inode,__u8 setsparse)1927 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1928 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1929 {
1930 struct cifsInodeInfo *cifsi;
1931 int rc;
1932
1933 cifsi = CIFS_I(inode);
1934
1935 /* if file already sparse don't bother setting sparse again */
1936 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1937 return true; /* already sparse */
1938
1939 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1940 return true; /* already not sparse */
1941
1942 /*
1943 * Can't check for sparse support on share the usual way via the
1944 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1945 * since Samba server doesn't set the flag on the share, yet
1946 * supports the set sparse FSCTL and returns sparse correctly
1947 * in the file attributes. If we fail setting sparse though we
1948 * mark that server does not support sparse files for this share
1949 * to avoid repeatedly sending the unsupported fsctl to server
1950 * if the file is repeatedly extended.
1951 */
1952 if (tcon->broken_sparse_sup)
1953 return false;
1954
1955 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1956 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1957 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1958 if (rc) {
1959 tcon->broken_sparse_sup = true;
1960 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1961 return false;
1962 }
1963
1964 if (setsparse)
1965 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1966 else
1967 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1968
1969 return true;
1970 }
1971
1972 static int
smb2_set_file_size(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,__u64 size,bool set_alloc)1973 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1974 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1975 {
1976 struct inode *inode;
1977
1978 /*
1979 * If extending file more than one page make sparse. Many Linux fs
1980 * make files sparse by default when extending via ftruncate
1981 */
1982 inode = d_inode(cfile->dentry);
1983
1984 if (!set_alloc && (size > inode->i_size + 8192)) {
1985 __u8 set_sparse = 1;
1986
1987 /* whether set sparse succeeds or not, extend the file */
1988 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1989 }
1990
1991 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1992 cfile->fid.volatile_fid, cfile->pid, size);
1993 }
1994
1995 static int
smb2_duplicate_extents(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1996 smb2_duplicate_extents(const unsigned int xid,
1997 struct cifsFileInfo *srcfile,
1998 struct cifsFileInfo *trgtfile, u64 src_off,
1999 u64 len, u64 dest_off)
2000 {
2001 int rc;
2002 unsigned int ret_data_len;
2003 struct inode *inode;
2004 struct duplicate_extents_to_file dup_ext_buf;
2005 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2006
2007 /* server fileays advertise duplicate extent support with this flag */
2008 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2009 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2010 return -EOPNOTSUPP;
2011
2012 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2013 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2014 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2015 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2016 dup_ext_buf.ByteCount = cpu_to_le64(len);
2017 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2018 src_off, dest_off, len);
2019
2020 inode = d_inode(trgtfile->dentry);
2021 if (inode->i_size < dest_off + len) {
2022 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2023 if (rc)
2024 goto duplicate_extents_out;
2025
2026 /*
2027 * Although also could set plausible allocation size (i_blocks)
2028 * here in addition to setting the file size, in reflink
2029 * it is likely that the target file is sparse. Its allocation
2030 * size will be queried on next revalidate, but it is important
2031 * to make sure that file's cached size is updated immediately
2032 */
2033 cifs_setsize(inode, dest_off + len);
2034 }
2035 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2036 trgtfile->fid.volatile_fid,
2037 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2038 (char *)&dup_ext_buf,
2039 sizeof(struct duplicate_extents_to_file),
2040 CIFSMaxBufSize, NULL,
2041 &ret_data_len);
2042
2043 if (ret_data_len > 0)
2044 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2045
2046 duplicate_extents_out:
2047 return rc;
2048 }
2049
2050 static int
smb2_set_compression(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2051 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2052 struct cifsFileInfo *cfile)
2053 {
2054 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2055 cfile->fid.volatile_fid);
2056 }
2057
2058 static int
smb3_set_integrity(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2059 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2060 struct cifsFileInfo *cfile)
2061 {
2062 struct fsctl_set_integrity_information_req integr_info;
2063 unsigned int ret_data_len;
2064
2065 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2066 integr_info.Flags = 0;
2067 integr_info.Reserved = 0;
2068
2069 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2070 cfile->fid.volatile_fid,
2071 FSCTL_SET_INTEGRITY_INFORMATION,
2072 (char *)&integr_info,
2073 sizeof(struct fsctl_set_integrity_information_req),
2074 CIFSMaxBufSize, NULL,
2075 &ret_data_len);
2076
2077 }
2078
2079 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2080 #define GMT_TOKEN_SIZE 50
2081
2082 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2083
2084 /*
2085 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2086 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2087 */
2088 static int
smb3_enum_snapshots(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,void __user * ioc_buf)2089 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2090 struct cifsFileInfo *cfile, void __user *ioc_buf)
2091 {
2092 char *retbuf = NULL;
2093 unsigned int ret_data_len = 0;
2094 int rc;
2095 u32 max_response_size;
2096 struct smb_snapshot_array snapshot_in;
2097
2098 /*
2099 * On the first query to enumerate the list of snapshots available
2100 * for this volume the buffer begins with 0 (number of snapshots
2101 * which can be returned is zero since at that point we do not know
2102 * how big the buffer needs to be). On the second query,
2103 * it (ret_data_len) is set to number of snapshots so we can
2104 * know to set the maximum response size larger (see below).
2105 */
2106 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2107 return -EFAULT;
2108
2109 /*
2110 * Note that for snapshot queries that servers like Azure expect that
2111 * the first query be minimal size (and just used to get the number/size
2112 * of previous versions) so response size must be specified as EXACTLY
2113 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2114 * of eight bytes.
2115 */
2116 if (ret_data_len == 0)
2117 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2118 else
2119 max_response_size = CIFSMaxBufSize;
2120
2121 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2122 cfile->fid.volatile_fid,
2123 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2124 NULL, 0 /* no input data */, max_response_size,
2125 (char **)&retbuf,
2126 &ret_data_len);
2127 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2128 rc, ret_data_len);
2129 if (rc)
2130 return rc;
2131
2132 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2133 /* Fixup buffer */
2134 if (copy_from_user(&snapshot_in, ioc_buf,
2135 sizeof(struct smb_snapshot_array))) {
2136 rc = -EFAULT;
2137 kfree(retbuf);
2138 return rc;
2139 }
2140
2141 /*
2142 * Check for min size, ie not large enough to fit even one GMT
2143 * token (snapshot). On the first ioctl some users may pass in
2144 * smaller size (or zero) to simply get the size of the array
2145 * so the user space caller can allocate sufficient memory
2146 * and retry the ioctl again with larger array size sufficient
2147 * to hold all of the snapshot GMT tokens on the second try.
2148 */
2149 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2150 ret_data_len = sizeof(struct smb_snapshot_array);
2151
2152 /*
2153 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2154 * the snapshot array (of 50 byte GMT tokens) each
2155 * representing an available previous version of the data
2156 */
2157 if (ret_data_len > (snapshot_in.snapshot_array_size +
2158 sizeof(struct smb_snapshot_array)))
2159 ret_data_len = snapshot_in.snapshot_array_size +
2160 sizeof(struct smb_snapshot_array);
2161
2162 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2163 rc = -EFAULT;
2164 }
2165
2166 kfree(retbuf);
2167 return rc;
2168 }
2169
2170
2171
2172 static int
smb3_notify(const unsigned int xid,struct file * pfile,void __user * ioc_buf,bool return_changes)2173 smb3_notify(const unsigned int xid, struct file *pfile,
2174 void __user *ioc_buf, bool return_changes)
2175 {
2176 struct smb3_notify_info notify;
2177 struct smb3_notify_info __user *pnotify_buf;
2178 struct dentry *dentry = pfile->f_path.dentry;
2179 struct inode *inode = file_inode(pfile);
2180 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2181 struct cifs_open_parms oparms;
2182 struct cifs_fid fid;
2183 struct cifs_tcon *tcon;
2184 const unsigned char *path;
2185 char *returned_ioctl_info = NULL;
2186 void *page = alloc_dentry_path();
2187 __le16 *utf16_path = NULL;
2188 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2189 int rc = 0;
2190 __u32 ret_len = 0;
2191
2192 path = build_path_from_dentry(dentry, page);
2193 if (IS_ERR(path)) {
2194 rc = PTR_ERR(path);
2195 goto notify_exit;
2196 }
2197
2198 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2199 if (utf16_path == NULL) {
2200 rc = -ENOMEM;
2201 goto notify_exit;
2202 }
2203
2204 if (return_changes) {
2205 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) {
2206 rc = -EFAULT;
2207 goto notify_exit;
2208 }
2209 } else {
2210 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) {
2211 rc = -EFAULT;
2212 goto notify_exit;
2213 }
2214 notify.data_len = 0;
2215 }
2216
2217 tcon = cifs_sb_master_tcon(cifs_sb);
2218 oparms = (struct cifs_open_parms) {
2219 .tcon = tcon,
2220 .path = path,
2221 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2222 .disposition = FILE_OPEN,
2223 .create_options = cifs_create_options(cifs_sb, 0),
2224 .fid = &fid,
2225 };
2226
2227 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2228 NULL);
2229 if (rc)
2230 goto notify_exit;
2231
2232 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2233 notify.watch_tree, notify.completion_filter,
2234 notify.data_len, &returned_ioctl_info, &ret_len);
2235
2236 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2237
2238 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2239 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2240 if (ret_len > notify.data_len)
2241 ret_len = notify.data_len;
2242 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2243 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2244 rc = -EFAULT;
2245 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2246 rc = -EFAULT;
2247 }
2248 kfree(returned_ioctl_info);
2249 notify_exit:
2250 free_dentry_path(page);
2251 kfree(utf16_path);
2252 return rc;
2253 }
2254
2255 static int
smb2_query_dir_first(const unsigned int xid,struct cifs_tcon * tcon,const char * path,struct cifs_sb_info * cifs_sb,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)2256 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2257 const char *path, struct cifs_sb_info *cifs_sb,
2258 struct cifs_fid *fid, __u16 search_flags,
2259 struct cifs_search_info *srch_inf)
2260 {
2261 __le16 *utf16_path;
2262 struct smb_rqst rqst[2];
2263 struct kvec rsp_iov[2];
2264 int resp_buftype[2];
2265 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2266 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2267 int rc, flags = 0;
2268 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2269 struct cifs_open_parms oparms;
2270 struct smb2_query_directory_rsp *qd_rsp = NULL;
2271 struct smb2_create_rsp *op_rsp = NULL;
2272 struct TCP_Server_Info *server;
2273 int retries = 0, cur_sleep = 1;
2274
2275 replay_again:
2276 /* reinitialize for possible replay */
2277 flags = 0;
2278 oplock = SMB2_OPLOCK_LEVEL_NONE;
2279 server = cifs_pick_channel(tcon->ses);
2280
2281 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2282 if (!utf16_path)
2283 return -ENOMEM;
2284
2285 if (smb3_encryption_required(tcon))
2286 flags |= CIFS_TRANSFORM_REQ;
2287
2288 memset(rqst, 0, sizeof(rqst));
2289 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2290 memset(rsp_iov, 0, sizeof(rsp_iov));
2291
2292 /* Open */
2293 memset(&open_iov, 0, sizeof(open_iov));
2294 rqst[0].rq_iov = open_iov;
2295 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2296
2297 oparms = (struct cifs_open_parms) {
2298 .tcon = tcon,
2299 .path = path,
2300 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2301 .disposition = FILE_OPEN,
2302 .create_options = cifs_create_options(cifs_sb, 0),
2303 .fid = fid,
2304 .replay = !!(retries),
2305 };
2306
2307 rc = SMB2_open_init(tcon, server,
2308 &rqst[0], &oplock, &oparms, utf16_path);
2309 if (rc)
2310 goto qdf_free;
2311 smb2_set_next_command(tcon, &rqst[0]);
2312
2313 /* Query directory */
2314 srch_inf->entries_in_buffer = 0;
2315 srch_inf->index_of_last_entry = 2;
2316
2317 memset(&qd_iov, 0, sizeof(qd_iov));
2318 rqst[1].rq_iov = qd_iov;
2319 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2320
2321 rc = SMB2_query_directory_init(xid, tcon, server,
2322 &rqst[1],
2323 COMPOUND_FID, COMPOUND_FID,
2324 0, srch_inf->info_level);
2325 if (rc)
2326 goto qdf_free;
2327
2328 smb2_set_related(&rqst[1]);
2329
2330 if (retries) {
2331 smb2_set_replay(server, &rqst[0]);
2332 smb2_set_replay(server, &rqst[1]);
2333 }
2334
2335 rc = compound_send_recv(xid, tcon->ses, server,
2336 flags, 2, rqst,
2337 resp_buftype, rsp_iov);
2338
2339 /* If the open failed there is nothing to do */
2340 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2341 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2342 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2343 goto qdf_free;
2344 }
2345 fid->persistent_fid = op_rsp->PersistentFileId;
2346 fid->volatile_fid = op_rsp->VolatileFileId;
2347
2348 /* Anything else than ENODATA means a genuine error */
2349 if (rc && rc != -ENODATA) {
2350 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2351 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2352 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2353 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2354 goto qdf_free;
2355 }
2356
2357 atomic_inc(&tcon->num_remote_opens);
2358
2359 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2360 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2361 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2362 tcon->tid, tcon->ses->Suid, 0, 0);
2363 srch_inf->endOfSearch = true;
2364 rc = 0;
2365 goto qdf_free;
2366 }
2367
2368 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2369 srch_inf);
2370 if (rc) {
2371 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2372 tcon->ses->Suid, 0, 0, rc);
2373 goto qdf_free;
2374 }
2375 resp_buftype[1] = CIFS_NO_BUFFER;
2376
2377 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2378 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2379
2380 qdf_free:
2381 kfree(utf16_path);
2382 SMB2_open_free(&rqst[0]);
2383 SMB2_query_directory_free(&rqst[1]);
2384 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2385 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2386
2387 if (is_replayable_error(rc) &&
2388 smb2_should_replay(tcon, &retries, &cur_sleep))
2389 goto replay_again;
2390
2391 return rc;
2392 }
2393
2394 static int
smb2_query_dir_next(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)2395 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2396 struct cifs_fid *fid, __u16 search_flags,
2397 struct cifs_search_info *srch_inf)
2398 {
2399 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2400 fid->volatile_fid, 0, srch_inf);
2401 }
2402
2403 static int
smb2_close_dir(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)2404 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2405 struct cifs_fid *fid)
2406 {
2407 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2408 }
2409
2410 /*
2411 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2412 * the number of credits and return true. Otherwise - return false.
2413 */
2414 static bool
smb2_is_status_pending(char * buf,struct TCP_Server_Info * server)2415 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2416 {
2417 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2418 int scredits, in_flight;
2419
2420 if (shdr->Status != STATUS_PENDING)
2421 return false;
2422
2423 if (shdr->CreditRequest) {
2424 spin_lock(&server->req_lock);
2425 server->credits += le16_to_cpu(shdr->CreditRequest);
2426 scredits = server->credits;
2427 in_flight = server->in_flight;
2428 spin_unlock(&server->req_lock);
2429 wake_up(&server->request_q);
2430
2431 trace_smb3_pend_credits(server->CurrentMid,
2432 server->conn_id, server->hostname, scredits,
2433 le16_to_cpu(shdr->CreditRequest), in_flight);
2434 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2435 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2436 }
2437
2438 return true;
2439 }
2440
2441 static bool
smb2_is_session_expired(char * buf)2442 smb2_is_session_expired(char *buf)
2443 {
2444 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2445
2446 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2447 shdr->Status != STATUS_USER_SESSION_DELETED)
2448 return false;
2449
2450 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2451 le64_to_cpu(shdr->SessionId),
2452 le16_to_cpu(shdr->Command),
2453 le64_to_cpu(shdr->MessageId));
2454 cifs_dbg(FYI, "Session expired or deleted\n");
2455
2456 return true;
2457 }
2458
2459 static bool
smb2_is_status_io_timeout(char * buf)2460 smb2_is_status_io_timeout(char *buf)
2461 {
2462 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2463
2464 if (shdr->Status == STATUS_IO_TIMEOUT)
2465 return true;
2466 else
2467 return false;
2468 }
2469
2470 static bool
smb2_is_network_name_deleted(char * buf,struct TCP_Server_Info * server)2471 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2472 {
2473 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2474 struct TCP_Server_Info *pserver;
2475 struct cifs_ses *ses;
2476 struct cifs_tcon *tcon;
2477
2478 if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2479 return false;
2480
2481 /* If server is a channel, select the primary channel */
2482 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2483
2484 spin_lock(&cifs_tcp_ses_lock);
2485 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2486 if (cifs_ses_exiting(ses))
2487 continue;
2488 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2489 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2490 spin_lock(&tcon->tc_lock);
2491 tcon->need_reconnect = true;
2492 spin_unlock(&tcon->tc_lock);
2493 spin_unlock(&cifs_tcp_ses_lock);
2494 pr_warn_once("Server share %s deleted.\n",
2495 tcon->tree_name);
2496 return true;
2497 }
2498 }
2499 }
2500 spin_unlock(&cifs_tcp_ses_lock);
2501
2502 return false;
2503 }
2504
2505 static int
smb2_oplock_response(struct cifs_tcon * tcon,__u64 persistent_fid,__u64 volatile_fid,__u16 net_fid,struct cifsInodeInfo * cinode)2506 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2507 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2508 {
2509 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2510 return SMB2_lease_break(0, tcon, cinode->lease_key,
2511 smb2_get_lease_state(cinode));
2512
2513 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2514 CIFS_CACHE_READ(cinode) ? 1 : 0);
2515 }
2516
2517 void
smb2_set_replay(struct TCP_Server_Info * server,struct smb_rqst * rqst)2518 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst)
2519 {
2520 struct smb2_hdr *shdr;
2521
2522 if (server->dialect < SMB30_PROT_ID)
2523 return;
2524
2525 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2526 if (shdr == NULL) {
2527 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2528 return;
2529 }
2530 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION;
2531 }
2532
2533 void
smb2_set_related(struct smb_rqst * rqst)2534 smb2_set_related(struct smb_rqst *rqst)
2535 {
2536 struct smb2_hdr *shdr;
2537
2538 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2539 if (shdr == NULL) {
2540 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2541 return;
2542 }
2543 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2544 }
2545
2546 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2547
2548 void
smb2_set_next_command(struct cifs_tcon * tcon,struct smb_rqst * rqst)2549 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2550 {
2551 struct smb2_hdr *shdr;
2552 struct cifs_ses *ses = tcon->ses;
2553 struct TCP_Server_Info *server = ses->server;
2554 unsigned long len = smb_rqst_len(server, rqst);
2555 int i, num_padding;
2556
2557 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2558 if (shdr == NULL) {
2559 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2560 return;
2561 }
2562
2563 /* SMB headers in a compound are 8 byte aligned. */
2564
2565 /* No padding needed */
2566 if (!(len & 7))
2567 goto finished;
2568
2569 num_padding = 8 - (len & 7);
2570 if (!smb3_encryption_required(tcon)) {
2571 /*
2572 * If we do not have encryption then we can just add an extra
2573 * iov for the padding.
2574 */
2575 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2576 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2577 rqst->rq_nvec++;
2578 len += num_padding;
2579 } else {
2580 /*
2581 * We can not add a small padding iov for the encryption case
2582 * because the encryption framework can not handle the padding
2583 * iovs.
2584 * We have to flatten this into a single buffer and add
2585 * the padding to it.
2586 */
2587 for (i = 1; i < rqst->rq_nvec; i++) {
2588 memcpy(rqst->rq_iov[0].iov_base +
2589 rqst->rq_iov[0].iov_len,
2590 rqst->rq_iov[i].iov_base,
2591 rqst->rq_iov[i].iov_len);
2592 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2593 }
2594 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2595 0, num_padding);
2596 rqst->rq_iov[0].iov_len += num_padding;
2597 len += num_padding;
2598 rqst->rq_nvec = 1;
2599 }
2600
2601 finished:
2602 shdr->NextCommand = cpu_to_le32(len);
2603 }
2604
2605 /*
2606 * helper function for exponential backoff and check if replayable
2607 */
smb2_should_replay(struct cifs_tcon * tcon,int * pretries,int * pcur_sleep)2608 bool smb2_should_replay(struct cifs_tcon *tcon,
2609 int *pretries,
2610 int *pcur_sleep)
2611 {
2612 if (!pretries || !pcur_sleep)
2613 return false;
2614
2615 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) {
2616 msleep(*pcur_sleep);
2617 (*pcur_sleep) = ((*pcur_sleep) << 1);
2618 if ((*pcur_sleep) > CIFS_MAX_SLEEP)
2619 (*pcur_sleep) = CIFS_MAX_SLEEP;
2620 return true;
2621 }
2622
2623 return false;
2624 }
2625
2626 /*
2627 * Passes the query info response back to the caller on success.
2628 * Caller need to free this with free_rsp_buf().
2629 */
2630 int
smb2_query_info_compound(const unsigned int xid,struct cifs_tcon * tcon,const char * path,u32 desired_access,u32 class,u32 type,u32 output_len,struct kvec * rsp,int * buftype,struct cifs_sb_info * cifs_sb)2631 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2632 const char *path, u32 desired_access,
2633 u32 class, u32 type, u32 output_len,
2634 struct kvec *rsp, int *buftype,
2635 struct cifs_sb_info *cifs_sb)
2636 {
2637 struct smb2_compound_vars *vars;
2638 struct cifs_ses *ses = tcon->ses;
2639 struct TCP_Server_Info *server;
2640 int flags = CIFS_CP_CREATE_CLOSE_OP;
2641 struct smb_rqst *rqst;
2642 int resp_buftype[3];
2643 struct kvec *rsp_iov;
2644 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2645 struct cifs_open_parms oparms;
2646 struct cifs_fid fid;
2647 int rc;
2648 __le16 *utf16_path;
2649 struct cached_fid *cfid = NULL;
2650 int retries = 0, cur_sleep = 1;
2651
2652 replay_again:
2653 /* reinitialize for possible replay */
2654 flags = CIFS_CP_CREATE_CLOSE_OP;
2655 oplock = SMB2_OPLOCK_LEVEL_NONE;
2656 server = cifs_pick_channel(ses);
2657
2658 if (!path)
2659 path = "";
2660 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2661 if (!utf16_path)
2662 return -ENOMEM;
2663
2664 if (smb3_encryption_required(tcon))
2665 flags |= CIFS_TRANSFORM_REQ;
2666
2667 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2668 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2669 if (!vars) {
2670 rc = -ENOMEM;
2671 goto out_free_path;
2672 }
2673 rqst = vars->rqst;
2674 rsp_iov = vars->rsp_iov;
2675
2676 /*
2677 * We can only call this for things we know are directories.
2678 */
2679 if (!strcmp(path, ""))
2680 open_cached_dir(xid, tcon, path, cifs_sb, false,
2681 &cfid); /* cfid null if open dir failed */
2682
2683 rqst[0].rq_iov = vars->open_iov;
2684 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2685
2686 oparms = (struct cifs_open_parms) {
2687 .tcon = tcon,
2688 .path = path,
2689 .desired_access = desired_access,
2690 .disposition = FILE_OPEN,
2691 .create_options = cifs_create_options(cifs_sb, 0),
2692 .fid = &fid,
2693 .replay = !!(retries),
2694 };
2695
2696 rc = SMB2_open_init(tcon, server,
2697 &rqst[0], &oplock, &oparms, utf16_path);
2698 if (rc)
2699 goto qic_exit;
2700 smb2_set_next_command(tcon, &rqst[0]);
2701
2702 rqst[1].rq_iov = &vars->qi_iov;
2703 rqst[1].rq_nvec = 1;
2704
2705 if (cfid) {
2706 rc = SMB2_query_info_init(tcon, server,
2707 &rqst[1],
2708 cfid->fid.persistent_fid,
2709 cfid->fid.volatile_fid,
2710 class, type, 0,
2711 output_len, 0,
2712 NULL);
2713 } else {
2714 rc = SMB2_query_info_init(tcon, server,
2715 &rqst[1],
2716 COMPOUND_FID,
2717 COMPOUND_FID,
2718 class, type, 0,
2719 output_len, 0,
2720 NULL);
2721 }
2722 if (rc)
2723 goto qic_exit;
2724 if (!cfid) {
2725 smb2_set_next_command(tcon, &rqst[1]);
2726 smb2_set_related(&rqst[1]);
2727 }
2728
2729 rqst[2].rq_iov = &vars->close_iov;
2730 rqst[2].rq_nvec = 1;
2731
2732 rc = SMB2_close_init(tcon, server,
2733 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2734 if (rc)
2735 goto qic_exit;
2736 smb2_set_related(&rqst[2]);
2737
2738 if (retries) {
2739 if (!cfid) {
2740 smb2_set_replay(server, &rqst[0]);
2741 smb2_set_replay(server, &rqst[2]);
2742 }
2743 smb2_set_replay(server, &rqst[1]);
2744 }
2745
2746 if (cfid) {
2747 rc = compound_send_recv(xid, ses, server,
2748 flags, 1, &rqst[1],
2749 &resp_buftype[1], &rsp_iov[1]);
2750 } else {
2751 rc = compound_send_recv(xid, ses, server,
2752 flags, 3, rqst,
2753 resp_buftype, rsp_iov);
2754 }
2755 if (rc) {
2756 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2757 if (rc == -EREMCHG) {
2758 tcon->need_reconnect = true;
2759 pr_warn_once("server share %s deleted\n",
2760 tcon->tree_name);
2761 }
2762 goto qic_exit;
2763 }
2764 *rsp = rsp_iov[1];
2765 *buftype = resp_buftype[1];
2766
2767 qic_exit:
2768 SMB2_open_free(&rqst[0]);
2769 SMB2_query_info_free(&rqst[1]);
2770 SMB2_close_free(&rqst[2]);
2771 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2772 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2773 if (cfid)
2774 close_cached_dir(cfid);
2775 kfree(vars);
2776 out_free_path:
2777 kfree(utf16_path);
2778
2779 if (is_replayable_error(rc) &&
2780 smb2_should_replay(tcon, &retries, &cur_sleep))
2781 goto replay_again;
2782
2783 return rc;
2784 }
2785
2786 static int
smb2_queryfs(const unsigned int xid,struct cifs_tcon * tcon,const char * path,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2787 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2788 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2789 {
2790 struct smb2_query_info_rsp *rsp;
2791 struct smb2_fs_full_size_info *info = NULL;
2792 struct kvec rsp_iov = {NULL, 0};
2793 int buftype = CIFS_NO_BUFFER;
2794 int rc;
2795
2796
2797 rc = smb2_query_info_compound(xid, tcon, path,
2798 FILE_READ_ATTRIBUTES,
2799 FS_FULL_SIZE_INFORMATION,
2800 SMB2_O_INFO_FILESYSTEM,
2801 sizeof(struct smb2_fs_full_size_info),
2802 &rsp_iov, &buftype, cifs_sb);
2803 if (rc)
2804 goto qfs_exit;
2805
2806 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2807 buf->f_type = SMB2_SUPER_MAGIC;
2808 info = (struct smb2_fs_full_size_info *)(
2809 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2810 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2811 le32_to_cpu(rsp->OutputBufferLength),
2812 &rsp_iov,
2813 sizeof(struct smb2_fs_full_size_info));
2814 if (!rc)
2815 smb2_copy_fs_info_to_kstatfs(info, buf);
2816
2817 qfs_exit:
2818 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2819 free_rsp_buf(buftype, rsp_iov.iov_base);
2820 return rc;
2821 }
2822
2823 static int
smb311_queryfs(const unsigned int xid,struct cifs_tcon * tcon,const char * path,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2824 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2825 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2826 {
2827 int rc;
2828 __le16 *utf16_path = NULL;
2829 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2830 struct cifs_open_parms oparms;
2831 struct cifs_fid fid;
2832
2833 if (!tcon->posix_extensions)
2834 return smb2_queryfs(xid, tcon, path, cifs_sb, buf);
2835
2836 oparms = (struct cifs_open_parms) {
2837 .tcon = tcon,
2838 .path = path,
2839 .desired_access = FILE_READ_ATTRIBUTES,
2840 .disposition = FILE_OPEN,
2841 .create_options = cifs_create_options(cifs_sb, 0),
2842 .fid = &fid,
2843 };
2844
2845 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2846 if (utf16_path == NULL)
2847 return -ENOMEM;
2848
2849 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
2850 NULL, NULL);
2851 kfree(utf16_path);
2852 if (rc)
2853 return rc;
2854
2855 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2856 fid.volatile_fid, buf);
2857 buf->f_type = SMB2_SUPER_MAGIC;
2858 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2859 return rc;
2860 }
2861
2862 static bool
smb2_compare_fids(struct cifsFileInfo * ob1,struct cifsFileInfo * ob2)2863 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2864 {
2865 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2866 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2867 }
2868
2869 static int
smb2_mand_lock(const unsigned int xid,struct cifsFileInfo * cfile,__u64 offset,__u64 length,__u32 type,int lock,int unlock,bool wait)2870 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2871 __u64 length, __u32 type, int lock, int unlock, bool wait)
2872 {
2873 if (unlock && !lock)
2874 type = SMB2_LOCKFLAG_UNLOCK;
2875 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2876 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2877 current->tgid, length, offset, type, wait);
2878 }
2879
2880 static void
smb2_get_lease_key(struct inode * inode,struct cifs_fid * fid)2881 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2882 {
2883 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2884 }
2885
2886 static void
smb2_set_lease_key(struct inode * inode,struct cifs_fid * fid)2887 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2888 {
2889 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2890 }
2891
2892 static void
smb2_new_lease_key(struct cifs_fid * fid)2893 smb2_new_lease_key(struct cifs_fid *fid)
2894 {
2895 generate_random_uuid(fid->lease_key);
2896 }
2897
2898 static int
smb2_get_dfs_refer(const unsigned int xid,struct cifs_ses * ses,const char * search_name,struct dfs_info3_param ** target_nodes,unsigned int * num_of_nodes,const struct nls_table * nls_codepage,int remap)2899 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2900 const char *search_name,
2901 struct dfs_info3_param **target_nodes,
2902 unsigned int *num_of_nodes,
2903 const struct nls_table *nls_codepage, int remap)
2904 {
2905 int rc;
2906 __le16 *utf16_path = NULL;
2907 int utf16_path_len = 0;
2908 struct cifs_tcon *tcon;
2909 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2910 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2911 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2912 int retry_count = 0;
2913
2914 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2915
2916 /*
2917 * Try to use the IPC tcon, otherwise just use any
2918 */
2919 tcon = ses->tcon_ipc;
2920 if (tcon == NULL) {
2921 spin_lock(&cifs_tcp_ses_lock);
2922 tcon = list_first_entry_or_null(&ses->tcon_list,
2923 struct cifs_tcon,
2924 tcon_list);
2925 if (tcon) {
2926 tcon->tc_count++;
2927 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,
2928 netfs_trace_tcon_ref_get_dfs_refer);
2929 }
2930 spin_unlock(&cifs_tcp_ses_lock);
2931 }
2932
2933 if (tcon == NULL) {
2934 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2935 ses);
2936 rc = -ENOTCONN;
2937 goto out;
2938 }
2939
2940 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2941 &utf16_path_len,
2942 nls_codepage, remap);
2943 if (!utf16_path) {
2944 rc = -ENOMEM;
2945 goto out;
2946 }
2947
2948 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2949 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2950 if (!dfs_req) {
2951 rc = -ENOMEM;
2952 goto out;
2953 }
2954
2955 /* Highest DFS referral version understood */
2956 dfs_req->MaxReferralLevel = DFS_VERSION;
2957
2958 /* Path to resolve in an UTF-16 null-terminated string */
2959 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2960
2961 do {
2962 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2963 FSCTL_DFS_GET_REFERRALS,
2964 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2965 (char **)&dfs_rsp, &dfs_rsp_size);
2966 if (!is_retryable_error(rc))
2967 break;
2968 usleep_range(512, 2048);
2969 } while (++retry_count < 5);
2970
2971 if (!rc && !dfs_rsp)
2972 rc = -EIO;
2973 if (rc) {
2974 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2975 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2976 goto out;
2977 }
2978
2979 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2980 num_of_nodes, target_nodes,
2981 nls_codepage, remap, search_name,
2982 true /* is_unicode */);
2983 if (rc) {
2984 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2985 goto out;
2986 }
2987
2988 out:
2989 if (tcon && !tcon->ipc) {
2990 /* ipc tcons are not refcounted */
2991 spin_lock(&cifs_tcp_ses_lock);
2992 tcon->tc_count--;
2993 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,
2994 netfs_trace_tcon_ref_dec_dfs_refer);
2995 /* tc_count can never go negative */
2996 WARN_ON(tcon->tc_count < 0);
2997 spin_unlock(&cifs_tcp_ses_lock);
2998 }
2999 kfree(utf16_path);
3000 kfree(dfs_req);
3001 kfree(dfs_rsp);
3002 return rc;
3003 }
3004
3005 static struct smb_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info * cifs_sb,const struct cifs_fid * cifsfid,u32 * pacllen,u32 info)3006 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3007 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3008 {
3009 struct smb_ntsd *pntsd = NULL;
3010 unsigned int xid;
3011 int rc = -EOPNOTSUPP;
3012 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3013
3014 if (IS_ERR(tlink))
3015 return ERR_CAST(tlink);
3016
3017 xid = get_xid();
3018 cifs_dbg(FYI, "trying to get acl\n");
3019
3020 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3021 cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3022 info);
3023 free_xid(xid);
3024
3025 cifs_put_tlink(tlink);
3026
3027 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3028 if (rc)
3029 return ERR_PTR(rc);
3030 return pntsd;
3031
3032 }
3033
3034 static struct smb_ntsd *
get_smb2_acl_by_path(struct cifs_sb_info * cifs_sb,const char * path,u32 * pacllen,u32 info)3035 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3036 const char *path, u32 *pacllen, u32 info)
3037 {
3038 struct smb_ntsd *pntsd = NULL;
3039 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3040 unsigned int xid;
3041 int rc;
3042 struct cifs_tcon *tcon;
3043 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3044 struct cifs_fid fid;
3045 struct cifs_open_parms oparms;
3046 __le16 *utf16_path;
3047
3048 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3049 if (IS_ERR(tlink))
3050 return ERR_CAST(tlink);
3051
3052 tcon = tlink_tcon(tlink);
3053 xid = get_xid();
3054
3055 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3056 if (!utf16_path) {
3057 rc = -ENOMEM;
3058 free_xid(xid);
3059 return ERR_PTR(rc);
3060 }
3061
3062 oparms = (struct cifs_open_parms) {
3063 .tcon = tcon,
3064 .path = path,
3065 .desired_access = READ_CONTROL,
3066 .disposition = FILE_OPEN,
3067 /*
3068 * When querying an ACL, even if the file is a symlink
3069 * we want to open the source not the target, and so
3070 * the protocol requires that the client specify this
3071 * flag when opening a reparse point
3072 */
3073 .create_options = cifs_create_options(cifs_sb, 0) |
3074 OPEN_REPARSE_POINT,
3075 .fid = &fid,
3076 };
3077
3078 if (info & SACL_SECINFO)
3079 oparms.desired_access |= SYSTEM_SECURITY;
3080
3081 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3082 NULL);
3083 kfree(utf16_path);
3084 if (!rc) {
3085 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3086 fid.volatile_fid, (void **)&pntsd, pacllen,
3087 info);
3088 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3089 }
3090
3091 cifs_put_tlink(tlink);
3092 free_xid(xid);
3093
3094 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3095 if (rc)
3096 return ERR_PTR(rc);
3097 return pntsd;
3098 }
3099
3100 static int
set_smb2_acl(struct smb_ntsd * pnntsd,__u32 acllen,struct inode * inode,const char * path,int aclflag)3101 set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen,
3102 struct inode *inode, const char *path, int aclflag)
3103 {
3104 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3105 unsigned int xid;
3106 int rc, access_flags = 0;
3107 struct cifs_tcon *tcon;
3108 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3109 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3110 struct cifs_fid fid;
3111 struct cifs_open_parms oparms;
3112 __le16 *utf16_path;
3113
3114 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3115 if (IS_ERR(tlink))
3116 return PTR_ERR(tlink);
3117
3118 tcon = tlink_tcon(tlink);
3119 xid = get_xid();
3120
3121 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3122 access_flags |= WRITE_OWNER;
3123 if (aclflag & CIFS_ACL_SACL)
3124 access_flags |= SYSTEM_SECURITY;
3125 if (aclflag & CIFS_ACL_DACL)
3126 access_flags |= WRITE_DAC;
3127
3128 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3129 if (!utf16_path) {
3130 rc = -ENOMEM;
3131 free_xid(xid);
3132 return rc;
3133 }
3134
3135 oparms = (struct cifs_open_parms) {
3136 .tcon = tcon,
3137 .desired_access = access_flags,
3138 .create_options = cifs_create_options(cifs_sb, 0),
3139 .disposition = FILE_OPEN,
3140 .path = path,
3141 .fid = &fid,
3142 };
3143
3144 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3145 NULL, NULL);
3146 kfree(utf16_path);
3147 if (!rc) {
3148 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3149 fid.volatile_fid, pnntsd, acllen, aclflag);
3150 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3151 }
3152
3153 cifs_put_tlink(tlink);
3154 free_xid(xid);
3155 return rc;
3156 }
3157
3158 /* Retrieve an ACL from the server */
3159 static struct smb_ntsd *
get_smb2_acl(struct cifs_sb_info * cifs_sb,struct inode * inode,const char * path,u32 * pacllen,u32 info)3160 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3161 struct inode *inode, const char *path,
3162 u32 *pacllen, u32 info)
3163 {
3164 struct smb_ntsd *pntsd = NULL;
3165 struct cifsFileInfo *open_file = NULL;
3166
3167 if (inode && !(info & SACL_SECINFO))
3168 open_file = find_readable_file(CIFS_I(inode), true);
3169 if (!open_file || (info & SACL_SECINFO))
3170 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3171
3172 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3173 cifsFileInfo_put(open_file);
3174 return pntsd;
3175 }
3176
smb3_zero_data(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,unsigned int xid)3177 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3178 loff_t offset, loff_t len, unsigned int xid)
3179 {
3180 struct cifsFileInfo *cfile = file->private_data;
3181 struct file_zero_data_information fsctl_buf;
3182
3183 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3184
3185 fsctl_buf.FileOffset = cpu_to_le64(offset);
3186 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3187
3188 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3189 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3190 (char *)&fsctl_buf,
3191 sizeof(struct file_zero_data_information),
3192 0, NULL, NULL);
3193 }
3194
smb3_zero_range(struct file * file,struct cifs_tcon * tcon,unsigned long long offset,unsigned long long len,bool keep_size)3195 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3196 unsigned long long offset, unsigned long long len,
3197 bool keep_size)
3198 {
3199 struct cifs_ses *ses = tcon->ses;
3200 struct inode *inode = file_inode(file);
3201 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3202 struct cifsFileInfo *cfile = file->private_data;
3203 struct netfs_inode *ictx = netfs_inode(inode);
3204 unsigned long long i_size, new_size, remote_size;
3205 long rc;
3206 unsigned int xid;
3207
3208 xid = get_xid();
3209
3210 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3211 ses->Suid, offset, len);
3212
3213 inode_lock(inode);
3214 filemap_invalidate_lock(inode->i_mapping);
3215
3216 i_size = i_size_read(inode);
3217 remote_size = ictx->remote_i_size;
3218 if (offset + len >= remote_size && offset < i_size) {
3219 unsigned long long top = umin(offset + len, i_size);
3220
3221 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1);
3222 if (rc < 0)
3223 goto zero_range_exit;
3224 }
3225
3226 /*
3227 * We zero the range through ioctl, so we need remove the page caches
3228 * first, otherwise the data may be inconsistent with the server.
3229 */
3230 truncate_pagecache_range(inode, offset, offset + len - 1);
3231
3232 /* if file not oplocked can't be sure whether asking to extend size */
3233 rc = -EOPNOTSUPP;
3234 if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3235 goto zero_range_exit;
3236
3237 rc = smb3_zero_data(file, tcon, offset, len, xid);
3238 if (rc < 0)
3239 goto zero_range_exit;
3240
3241 /*
3242 * do we also need to change the size of the file?
3243 */
3244 new_size = offset + len;
3245 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3246 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3247 cfile->fid.volatile_fid, cfile->pid, new_size);
3248 if (rc >= 0) {
3249 truncate_setsize(inode, new_size);
3250 fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3251 }
3252 }
3253
3254 zero_range_exit:
3255 filemap_invalidate_unlock(inode->i_mapping);
3256 inode_unlock(inode);
3257 free_xid(xid);
3258 if (rc)
3259 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3260 ses->Suid, offset, len, rc);
3261 else
3262 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3263 ses->Suid, offset, len);
3264 return rc;
3265 }
3266
smb3_punch_hole(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len)3267 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3268 loff_t offset, loff_t len)
3269 {
3270 struct inode *inode = file_inode(file);
3271 struct cifsFileInfo *cfile = file->private_data;
3272 struct file_zero_data_information fsctl_buf;
3273 unsigned long long end = offset + len, i_size, remote_i_size;
3274 long rc;
3275 unsigned int xid;
3276 __u8 set_sparse = 1;
3277
3278 xid = get_xid();
3279
3280 inode_lock(inode);
3281 /* Need to make file sparse, if not already, before freeing range. */
3282 /* Consider adding equivalent for compressed since it could also work */
3283 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3284 rc = -EOPNOTSUPP;
3285 goto out;
3286 }
3287
3288 filemap_invalidate_lock(inode->i_mapping);
3289 /*
3290 * We implement the punch hole through ioctl, so we need remove the page
3291 * caches first, otherwise the data may be inconsistent with the server.
3292 */
3293 truncate_pagecache_range(inode, offset, offset + len - 1);
3294
3295 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3296
3297 fsctl_buf.FileOffset = cpu_to_le64(offset);
3298 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3299
3300 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3301 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3302 (char *)&fsctl_buf,
3303 sizeof(struct file_zero_data_information),
3304 CIFSMaxBufSize, NULL, NULL);
3305
3306 if (rc)
3307 goto unlock;
3308
3309 /* If there's dirty data in the buffer that would extend the EOF if it
3310 * were written, then we need to move the EOF marker over to the lower
3311 * of the high end of the hole and the proposed EOF. The problem is
3312 * that we locally hole-punch the tail of the dirty data, the proposed
3313 * EOF update will end up in the wrong place.
3314 */
3315 i_size = i_size_read(inode);
3316 remote_i_size = netfs_inode(inode)->remote_i_size;
3317 if (end > remote_i_size && i_size > remote_i_size) {
3318 unsigned long long extend_to = umin(end, i_size);
3319 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3320 cfile->fid.volatile_fid, cfile->pid, extend_to);
3321 if (rc >= 0)
3322 netfs_inode(inode)->remote_i_size = extend_to;
3323 }
3324
3325 unlock:
3326 filemap_invalidate_unlock(inode->i_mapping);
3327 out:
3328 inode_unlock(inode);
3329 free_xid(xid);
3330 return rc;
3331 }
3332
smb3_simple_fallocate_write_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len,char * buf)3333 static int smb3_simple_fallocate_write_range(unsigned int xid,
3334 struct cifs_tcon *tcon,
3335 struct cifsFileInfo *cfile,
3336 loff_t off, loff_t len,
3337 char *buf)
3338 {
3339 struct cifs_io_parms io_parms = {0};
3340 int nbytes;
3341 int rc = 0;
3342 struct kvec iov[2];
3343
3344 io_parms.netfid = cfile->fid.netfid;
3345 io_parms.pid = current->tgid;
3346 io_parms.tcon = tcon;
3347 io_parms.persistent_fid = cfile->fid.persistent_fid;
3348 io_parms.volatile_fid = cfile->fid.volatile_fid;
3349
3350 while (len) {
3351 io_parms.offset = off;
3352 io_parms.length = len;
3353 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3354 io_parms.length = SMB2_MAX_BUFFER_SIZE;
3355 /* iov[0] is reserved for smb header */
3356 iov[1].iov_base = buf;
3357 iov[1].iov_len = io_parms.length;
3358 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3359 if (rc)
3360 break;
3361 if (nbytes > len)
3362 return -EINVAL;
3363 buf += nbytes;
3364 off += nbytes;
3365 len -= nbytes;
3366 }
3367 return rc;
3368 }
3369
smb3_simple_fallocate_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len)3370 static int smb3_simple_fallocate_range(unsigned int xid,
3371 struct cifs_tcon *tcon,
3372 struct cifsFileInfo *cfile,
3373 loff_t off, loff_t len)
3374 {
3375 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3376 u32 out_data_len;
3377 char *buf = NULL;
3378 loff_t l;
3379 int rc;
3380
3381 in_data.file_offset = cpu_to_le64(off);
3382 in_data.length = cpu_to_le64(len);
3383 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3384 cfile->fid.volatile_fid,
3385 FSCTL_QUERY_ALLOCATED_RANGES,
3386 (char *)&in_data, sizeof(in_data),
3387 1024 * sizeof(struct file_allocated_range_buffer),
3388 (char **)&out_data, &out_data_len);
3389 if (rc)
3390 goto out;
3391
3392 buf = kzalloc(1024 * 1024, GFP_KERNEL);
3393 if (buf == NULL) {
3394 rc = -ENOMEM;
3395 goto out;
3396 }
3397
3398 tmp_data = out_data;
3399 while (len) {
3400 /*
3401 * The rest of the region is unmapped so write it all.
3402 */
3403 if (out_data_len == 0) {
3404 rc = smb3_simple_fallocate_write_range(xid, tcon,
3405 cfile, off, len, buf);
3406 goto out;
3407 }
3408
3409 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3410 rc = -EINVAL;
3411 goto out;
3412 }
3413
3414 if (off < le64_to_cpu(tmp_data->file_offset)) {
3415 /*
3416 * We are at a hole. Write until the end of the region
3417 * or until the next allocated data,
3418 * whichever comes next.
3419 */
3420 l = le64_to_cpu(tmp_data->file_offset) - off;
3421 if (len < l)
3422 l = len;
3423 rc = smb3_simple_fallocate_write_range(xid, tcon,
3424 cfile, off, l, buf);
3425 if (rc)
3426 goto out;
3427 off = off + l;
3428 len = len - l;
3429 if (len == 0)
3430 goto out;
3431 }
3432 /*
3433 * We are at a section of allocated data, just skip forward
3434 * until the end of the data or the end of the region
3435 * we are supposed to fallocate, whichever comes first.
3436 */
3437 l = le64_to_cpu(tmp_data->length);
3438 if (len < l)
3439 l = len;
3440 off += l;
3441 len -= l;
3442
3443 tmp_data = &tmp_data[1];
3444 out_data_len -= sizeof(struct file_allocated_range_buffer);
3445 }
3446
3447 out:
3448 kfree(out_data);
3449 kfree(buf);
3450 return rc;
3451 }
3452
3453
smb3_simple_falloc(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len,bool keep_size)3454 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3455 loff_t off, loff_t len, bool keep_size)
3456 {
3457 struct inode *inode;
3458 struct cifsInodeInfo *cifsi;
3459 struct cifsFileInfo *cfile = file->private_data;
3460 long rc = -EOPNOTSUPP;
3461 unsigned int xid;
3462 loff_t new_eof;
3463
3464 xid = get_xid();
3465
3466 inode = d_inode(cfile->dentry);
3467 cifsi = CIFS_I(inode);
3468
3469 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3470 tcon->ses->Suid, off, len);
3471 /* if file not oplocked can't be sure whether asking to extend size */
3472 if (!CIFS_CACHE_READ(cifsi))
3473 if (keep_size == false) {
3474 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3475 tcon->tid, tcon->ses->Suid, off, len, rc);
3476 free_xid(xid);
3477 return rc;
3478 }
3479
3480 /*
3481 * Extending the file
3482 */
3483 if ((keep_size == false) && i_size_read(inode) < off + len) {
3484 rc = inode_newsize_ok(inode, off + len);
3485 if (rc)
3486 goto out;
3487
3488 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3489 smb2_set_sparse(xid, tcon, cfile, inode, false);
3490
3491 new_eof = off + len;
3492 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3493 cfile->fid.volatile_fid, cfile->pid, new_eof);
3494 if (rc == 0) {
3495 cifsi->server_eof = new_eof;
3496 cifs_setsize(inode, new_eof);
3497 cifs_truncate_page(inode->i_mapping, inode->i_size);
3498 truncate_setsize(inode, new_eof);
3499 }
3500 goto out;
3501 }
3502
3503 /*
3504 * Files are non-sparse by default so falloc may be a no-op
3505 * Must check if file sparse. If not sparse, and since we are not
3506 * extending then no need to do anything since file already allocated
3507 */
3508 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3509 rc = 0;
3510 goto out;
3511 }
3512
3513 if (keep_size == true) {
3514 /*
3515 * We can not preallocate pages beyond the end of the file
3516 * in SMB2
3517 */
3518 if (off >= i_size_read(inode)) {
3519 rc = 0;
3520 goto out;
3521 }
3522 /*
3523 * For fallocates that are partially beyond the end of file,
3524 * clamp len so we only fallocate up to the end of file.
3525 */
3526 if (off + len > i_size_read(inode)) {
3527 len = i_size_read(inode) - off;
3528 }
3529 }
3530
3531 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3532 /*
3533 * At this point, we are trying to fallocate an internal
3534 * regions of a sparse file. Since smb2 does not have a
3535 * fallocate command we have two otions on how to emulate this.
3536 * We can either turn the entire file to become non-sparse
3537 * which we only do if the fallocate is for virtually
3538 * the whole file, or we can overwrite the region with zeroes
3539 * using SMB2_write, which could be prohibitevly expensive
3540 * if len is large.
3541 */
3542 /*
3543 * We are only trying to fallocate a small region so
3544 * just write it with zero.
3545 */
3546 if (len <= 1024 * 1024) {
3547 rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3548 off, len);
3549 goto out;
3550 }
3551
3552 /*
3553 * Check if falloc starts within first few pages of file
3554 * and ends within a few pages of the end of file to
3555 * ensure that most of file is being forced to be
3556 * fallocated now. If so then setting whole file sparse
3557 * ie potentially making a few extra pages at the beginning
3558 * or end of the file non-sparse via set_sparse is harmless.
3559 */
3560 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3561 rc = -EOPNOTSUPP;
3562 goto out;
3563 }
3564 }
3565
3566 smb2_set_sparse(xid, tcon, cfile, inode, false);
3567 rc = 0;
3568
3569 out:
3570 if (rc)
3571 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3572 tcon->ses->Suid, off, len, rc);
3573 else
3574 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3575 tcon->ses->Suid, off, len);
3576
3577 free_xid(xid);
3578 return rc;
3579 }
3580
smb3_collapse_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3581 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3582 loff_t off, loff_t len)
3583 {
3584 int rc;
3585 unsigned int xid;
3586 struct inode *inode = file_inode(file);
3587 struct cifsFileInfo *cfile = file->private_data;
3588 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3589 loff_t old_eof, new_eof;
3590
3591 xid = get_xid();
3592
3593 inode_lock(inode);
3594
3595 old_eof = i_size_read(inode);
3596 if ((off >= old_eof) ||
3597 off + len >= old_eof) {
3598 rc = -EINVAL;
3599 goto out;
3600 }
3601
3602 filemap_invalidate_lock(inode->i_mapping);
3603 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3604 if (rc < 0)
3605 goto out_2;
3606
3607 truncate_pagecache_range(inode, off, old_eof);
3608
3609 rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3610 old_eof - off - len, off);
3611 if (rc < 0)
3612 goto out_2;
3613
3614 new_eof = old_eof - len;
3615 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3616 cfile->fid.volatile_fid, cfile->pid, new_eof);
3617 if (rc < 0)
3618 goto out_2;
3619
3620 rc = 0;
3621
3622 cifsi->server_eof = i_size_read(inode) - len;
3623 truncate_setsize(inode, cifsi->server_eof);
3624 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3625 out_2:
3626 filemap_invalidate_unlock(inode->i_mapping);
3627 out:
3628 inode_unlock(inode);
3629 free_xid(xid);
3630 return rc;
3631 }
3632
smb3_insert_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3633 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3634 loff_t off, loff_t len)
3635 {
3636 int rc;
3637 unsigned int xid;
3638 struct cifsFileInfo *cfile = file->private_data;
3639 struct inode *inode = file_inode(file);
3640 __u64 count, old_eof, new_eof;
3641
3642 xid = get_xid();
3643
3644 inode_lock(inode);
3645
3646 old_eof = i_size_read(inode);
3647 if (off >= old_eof) {
3648 rc = -EINVAL;
3649 goto out;
3650 }
3651
3652 count = old_eof - off;
3653 new_eof = old_eof + len;
3654
3655 filemap_invalidate_lock(inode->i_mapping);
3656 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1);
3657 if (rc < 0)
3658 goto out_2;
3659 truncate_pagecache_range(inode, off, old_eof);
3660
3661 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3662 cfile->fid.volatile_fid, cfile->pid, new_eof);
3663 if (rc < 0)
3664 goto out_2;
3665
3666 truncate_setsize(inode, new_eof);
3667 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3668
3669 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3670 if (rc < 0)
3671 goto out_2;
3672
3673 rc = smb3_zero_data(file, tcon, off, len, xid);
3674 if (rc < 0)
3675 goto out_2;
3676
3677 rc = 0;
3678 out_2:
3679 filemap_invalidate_unlock(inode->i_mapping);
3680 out:
3681 inode_unlock(inode);
3682 free_xid(xid);
3683 return rc;
3684 }
3685
smb3_llseek(struct file * file,struct cifs_tcon * tcon,loff_t offset,int whence)3686 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3687 {
3688 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3689 struct cifsInodeInfo *cifsi;
3690 struct inode *inode;
3691 int rc = 0;
3692 struct file_allocated_range_buffer in_data, *out_data = NULL;
3693 u32 out_data_len;
3694 unsigned int xid;
3695
3696 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3697 return generic_file_llseek(file, offset, whence);
3698
3699 inode = d_inode(cfile->dentry);
3700 cifsi = CIFS_I(inode);
3701
3702 if (offset < 0 || offset >= i_size_read(inode))
3703 return -ENXIO;
3704
3705 xid = get_xid();
3706 /*
3707 * We need to be sure that all dirty pages are written as they
3708 * might fill holes on the server.
3709 * Note that we also MUST flush any written pages since at least
3710 * some servers (Windows2016) will not reflect recent writes in
3711 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3712 */
3713 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3714 if (wrcfile) {
3715 filemap_write_and_wait(inode->i_mapping);
3716 smb2_flush_file(xid, tcon, &wrcfile->fid);
3717 cifsFileInfo_put(wrcfile);
3718 }
3719
3720 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3721 if (whence == SEEK_HOLE)
3722 offset = i_size_read(inode);
3723 goto lseek_exit;
3724 }
3725
3726 in_data.file_offset = cpu_to_le64(offset);
3727 in_data.length = cpu_to_le64(i_size_read(inode));
3728
3729 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3730 cfile->fid.volatile_fid,
3731 FSCTL_QUERY_ALLOCATED_RANGES,
3732 (char *)&in_data, sizeof(in_data),
3733 sizeof(struct file_allocated_range_buffer),
3734 (char **)&out_data, &out_data_len);
3735 if (rc == -E2BIG)
3736 rc = 0;
3737 if (rc)
3738 goto lseek_exit;
3739
3740 if (whence == SEEK_HOLE && out_data_len == 0)
3741 goto lseek_exit;
3742
3743 if (whence == SEEK_DATA && out_data_len == 0) {
3744 rc = -ENXIO;
3745 goto lseek_exit;
3746 }
3747
3748 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3749 rc = -EINVAL;
3750 goto lseek_exit;
3751 }
3752 if (whence == SEEK_DATA) {
3753 offset = le64_to_cpu(out_data->file_offset);
3754 goto lseek_exit;
3755 }
3756 if (offset < le64_to_cpu(out_data->file_offset))
3757 goto lseek_exit;
3758
3759 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3760
3761 lseek_exit:
3762 free_xid(xid);
3763 kfree(out_data);
3764 if (!rc)
3765 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3766 else
3767 return rc;
3768 }
3769
smb3_fiemap(struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct fiemap_extent_info * fei,u64 start,u64 len)3770 static int smb3_fiemap(struct cifs_tcon *tcon,
3771 struct cifsFileInfo *cfile,
3772 struct fiemap_extent_info *fei, u64 start, u64 len)
3773 {
3774 unsigned int xid;
3775 struct file_allocated_range_buffer in_data, *out_data;
3776 u32 out_data_len;
3777 int i, num, rc, flags, last_blob;
3778 u64 next;
3779
3780 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3781 if (rc)
3782 return rc;
3783
3784 xid = get_xid();
3785 again:
3786 in_data.file_offset = cpu_to_le64(start);
3787 in_data.length = cpu_to_le64(len);
3788
3789 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3790 cfile->fid.volatile_fid,
3791 FSCTL_QUERY_ALLOCATED_RANGES,
3792 (char *)&in_data, sizeof(in_data),
3793 1024 * sizeof(struct file_allocated_range_buffer),
3794 (char **)&out_data, &out_data_len);
3795 if (rc == -E2BIG) {
3796 last_blob = 0;
3797 rc = 0;
3798 } else
3799 last_blob = 1;
3800 if (rc)
3801 goto out;
3802
3803 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3804 rc = -EINVAL;
3805 goto out;
3806 }
3807 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3808 rc = -EINVAL;
3809 goto out;
3810 }
3811
3812 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3813 for (i = 0; i < num; i++) {
3814 flags = 0;
3815 if (i == num - 1 && last_blob)
3816 flags |= FIEMAP_EXTENT_LAST;
3817
3818 rc = fiemap_fill_next_extent(fei,
3819 le64_to_cpu(out_data[i].file_offset),
3820 le64_to_cpu(out_data[i].file_offset),
3821 le64_to_cpu(out_data[i].length),
3822 flags);
3823 if (rc < 0)
3824 goto out;
3825 if (rc == 1) {
3826 rc = 0;
3827 goto out;
3828 }
3829 }
3830
3831 if (!last_blob) {
3832 next = le64_to_cpu(out_data[num - 1].file_offset) +
3833 le64_to_cpu(out_data[num - 1].length);
3834 len = len - (next - start);
3835 start = next;
3836 goto again;
3837 }
3838
3839 out:
3840 free_xid(xid);
3841 kfree(out_data);
3842 return rc;
3843 }
3844
smb3_fallocate(struct file * file,struct cifs_tcon * tcon,int mode,loff_t off,loff_t len)3845 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3846 loff_t off, loff_t len)
3847 {
3848 /* KEEP_SIZE already checked for by do_fallocate */
3849 if (mode & FALLOC_FL_PUNCH_HOLE)
3850 return smb3_punch_hole(file, tcon, off, len);
3851 else if (mode & FALLOC_FL_ZERO_RANGE) {
3852 if (mode & FALLOC_FL_KEEP_SIZE)
3853 return smb3_zero_range(file, tcon, off, len, true);
3854 return smb3_zero_range(file, tcon, off, len, false);
3855 } else if (mode == FALLOC_FL_KEEP_SIZE)
3856 return smb3_simple_falloc(file, tcon, off, len, true);
3857 else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3858 return smb3_collapse_range(file, tcon, off, len);
3859 else if (mode == FALLOC_FL_INSERT_RANGE)
3860 return smb3_insert_range(file, tcon, off, len);
3861 else if (mode == 0)
3862 return smb3_simple_falloc(file, tcon, off, len, false);
3863
3864 return -EOPNOTSUPP;
3865 }
3866
3867 static void
smb2_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3868 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3869 struct cifsInodeInfo *cinode, __u32 oplock,
3870 unsigned int epoch, bool *purge_cache)
3871 {
3872 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3873 }
3874
3875 static void
3876 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3877 unsigned int epoch, bool *purge_cache);
3878
3879 static void
smb3_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3880 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3881 struct cifsInodeInfo *cinode, __u32 oplock,
3882 unsigned int epoch, bool *purge_cache)
3883 {
3884 unsigned int old_state = cinode->oplock;
3885 unsigned int old_epoch = cinode->epoch;
3886 unsigned int new_state;
3887
3888 if (epoch > old_epoch) {
3889 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3890 cinode->epoch = epoch;
3891 }
3892
3893 new_state = cinode->oplock;
3894 *purge_cache = false;
3895
3896 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3897 (new_state & CIFS_CACHE_READ_FLG) == 0)
3898 *purge_cache = true;
3899 else if (old_state == new_state && (epoch - old_epoch > 1))
3900 *purge_cache = true;
3901 }
3902
3903 static void
smb2_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3904 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3905 unsigned int epoch, bool *purge_cache)
3906 {
3907 oplock &= 0xFF;
3908 cinode->lease_granted = false;
3909 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3910 return;
3911 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3912 cinode->oplock = CIFS_CACHE_RHW_FLG;
3913 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3914 &cinode->netfs.inode);
3915 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3916 cinode->oplock = CIFS_CACHE_RW_FLG;
3917 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3918 &cinode->netfs.inode);
3919 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3920 cinode->oplock = CIFS_CACHE_READ_FLG;
3921 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3922 &cinode->netfs.inode);
3923 } else
3924 cinode->oplock = 0;
3925 }
3926
3927 static void
smb21_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3928 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3929 unsigned int epoch, bool *purge_cache)
3930 {
3931 char message[5] = {0};
3932 unsigned int new_oplock = 0;
3933
3934 oplock &= 0xFF;
3935 cinode->lease_granted = true;
3936 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3937 return;
3938
3939 /* Check if the server granted an oplock rather than a lease */
3940 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3941 return smb2_set_oplock_level(cinode, oplock, epoch,
3942 purge_cache);
3943
3944 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3945 new_oplock |= CIFS_CACHE_READ_FLG;
3946 strcat(message, "R");
3947 }
3948 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3949 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3950 strcat(message, "H");
3951 }
3952 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3953 new_oplock |= CIFS_CACHE_WRITE_FLG;
3954 strcat(message, "W");
3955 }
3956 if (!new_oplock)
3957 strncpy(message, "None", sizeof(message));
3958
3959 cinode->oplock = new_oplock;
3960 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3961 &cinode->netfs.inode);
3962 }
3963
3964 static void
smb3_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3965 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3966 unsigned int epoch, bool *purge_cache)
3967 {
3968 unsigned int old_oplock = cinode->oplock;
3969
3970 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3971
3972 if (purge_cache) {
3973 *purge_cache = false;
3974 if (old_oplock == CIFS_CACHE_READ_FLG) {
3975 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3976 (epoch - cinode->epoch > 0))
3977 *purge_cache = true;
3978 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3979 (epoch - cinode->epoch > 1))
3980 *purge_cache = true;
3981 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3982 (epoch - cinode->epoch > 1))
3983 *purge_cache = true;
3984 else if (cinode->oplock == 0 &&
3985 (epoch - cinode->epoch > 0))
3986 *purge_cache = true;
3987 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3988 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3989 (epoch - cinode->epoch > 0))
3990 *purge_cache = true;
3991 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3992 (epoch - cinode->epoch > 1))
3993 *purge_cache = true;
3994 }
3995 cinode->epoch = epoch;
3996 }
3997 }
3998
3999 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4000 static bool
smb2_is_read_op(__u32 oplock)4001 smb2_is_read_op(__u32 oplock)
4002 {
4003 return oplock == SMB2_OPLOCK_LEVEL_II;
4004 }
4005 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4006
4007 static bool
smb21_is_read_op(__u32 oplock)4008 smb21_is_read_op(__u32 oplock)
4009 {
4010 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4011 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4012 }
4013
4014 static __le32
map_oplock_to_lease(u8 oplock)4015 map_oplock_to_lease(u8 oplock)
4016 {
4017 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4018 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4019 else if (oplock == SMB2_OPLOCK_LEVEL_II)
4020 return SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE;
4021 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4022 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4023 SMB2_LEASE_WRITE_CACHING_LE;
4024 return 0;
4025 }
4026
4027 static char *
smb2_create_lease_buf(u8 * lease_key,u8 oplock)4028 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4029 {
4030 struct create_lease *buf;
4031
4032 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4033 if (!buf)
4034 return NULL;
4035
4036 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4037 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4038
4039 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4040 (struct create_lease, lcontext));
4041 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4042 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4043 (struct create_lease, Name));
4044 buf->ccontext.NameLength = cpu_to_le16(4);
4045 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4046 buf->Name[0] = 'R';
4047 buf->Name[1] = 'q';
4048 buf->Name[2] = 'L';
4049 buf->Name[3] = 's';
4050 return (char *)buf;
4051 }
4052
4053 static char *
smb3_create_lease_buf(u8 * lease_key,u8 oplock)4054 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4055 {
4056 struct create_lease_v2 *buf;
4057
4058 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4059 if (!buf)
4060 return NULL;
4061
4062 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4063 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4064
4065 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4066 (struct create_lease_v2, lcontext));
4067 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4068 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4069 (struct create_lease_v2, Name));
4070 buf->ccontext.NameLength = cpu_to_le16(4);
4071 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4072 buf->Name[0] = 'R';
4073 buf->Name[1] = 'q';
4074 buf->Name[2] = 'L';
4075 buf->Name[3] = 's';
4076 return (char *)buf;
4077 }
4078
4079 static __u8
smb2_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4080 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4081 {
4082 struct create_lease *lc = (struct create_lease *)buf;
4083
4084 *epoch = 0; /* not used */
4085 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4086 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4087 return le32_to_cpu(lc->lcontext.LeaseState);
4088 }
4089
4090 static __u8
smb3_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4091 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4092 {
4093 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4094
4095 *epoch = le16_to_cpu(lc->lcontext.Epoch);
4096 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4097 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4098 if (lease_key)
4099 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4100 return le32_to_cpu(lc->lcontext.LeaseState);
4101 }
4102
4103 static unsigned int
smb2_wp_retry_size(struct inode * inode)4104 smb2_wp_retry_size(struct inode *inode)
4105 {
4106 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4107 SMB2_MAX_BUFFER_SIZE);
4108 }
4109
4110 static bool
smb2_dir_needs_close(struct cifsFileInfo * cfile)4111 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4112 {
4113 return !cfile->invalidHandle;
4114 }
4115
4116 static void
fill_transform_hdr(struct smb2_transform_hdr * tr_hdr,unsigned int orig_len,struct smb_rqst * old_rq,__le16 cipher_type)4117 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4118 struct smb_rqst *old_rq, __le16 cipher_type)
4119 {
4120 struct smb2_hdr *shdr =
4121 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4122
4123 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4124 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4125 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4126 tr_hdr->Flags = cpu_to_le16(0x01);
4127 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4128 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4129 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4130 else
4131 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4132 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4133 }
4134
smb2_aead_req_alloc(struct crypto_aead * tfm,const struct smb_rqst * rqst,int num_rqst,const u8 * sig,u8 ** iv,struct aead_request ** req,struct sg_table * sgt,unsigned int * num_sgs,size_t * sensitive_size)4135 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4136 int num_rqst, const u8 *sig, u8 **iv,
4137 struct aead_request **req, struct sg_table *sgt,
4138 unsigned int *num_sgs, size_t *sensitive_size)
4139 {
4140 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4141 unsigned int iv_size = crypto_aead_ivsize(tfm);
4142 unsigned int len;
4143 u8 *p;
4144
4145 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4146 if (IS_ERR_VALUE((long)(int)*num_sgs))
4147 return ERR_PTR(*num_sgs);
4148
4149 len = iv_size;
4150 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4151 len = ALIGN(len, crypto_tfm_ctx_alignment());
4152 len += req_size;
4153 len = ALIGN(len, __alignof__(struct scatterlist));
4154 len += array_size(*num_sgs, sizeof(struct scatterlist));
4155 *sensitive_size = len;
4156
4157 p = kvzalloc(len, GFP_NOFS);
4158 if (!p)
4159 return ERR_PTR(-ENOMEM);
4160
4161 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4162 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4163 crypto_tfm_ctx_alignment());
4164 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4165 __alignof__(struct scatterlist));
4166 return p;
4167 }
4168
smb2_get_aead_req(struct crypto_aead * tfm,struct smb_rqst * rqst,int num_rqst,const u8 * sig,u8 ** iv,struct aead_request ** req,struct scatterlist ** sgl,size_t * sensitive_size)4169 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4170 int num_rqst, const u8 *sig, u8 **iv,
4171 struct aead_request **req, struct scatterlist **sgl,
4172 size_t *sensitive_size)
4173 {
4174 struct sg_table sgtable = {};
4175 unsigned int skip, num_sgs, i, j;
4176 ssize_t rc;
4177 void *p;
4178
4179 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4180 &num_sgs, sensitive_size);
4181 if (IS_ERR(p))
4182 return ERR_CAST(p);
4183
4184 sg_init_marker(sgtable.sgl, num_sgs);
4185
4186 /*
4187 * The first rqst has a transform header where the
4188 * first 20 bytes are not part of the encrypted blob.
4189 */
4190 skip = 20;
4191
4192 for (i = 0; i < num_rqst; i++) {
4193 struct iov_iter *iter = &rqst[i].rq_iter;
4194 size_t count = iov_iter_count(iter);
4195
4196 for (j = 0; j < rqst[i].rq_nvec; j++) {
4197 cifs_sg_set_buf(&sgtable,
4198 rqst[i].rq_iov[j].iov_base + skip,
4199 rqst[i].rq_iov[j].iov_len - skip);
4200
4201 /* See the above comment on the 'skip' assignment */
4202 skip = 0;
4203 }
4204 sgtable.orig_nents = sgtable.nents;
4205
4206 rc = extract_iter_to_sg(iter, count, &sgtable,
4207 num_sgs - sgtable.nents, 0);
4208 iov_iter_revert(iter, rc);
4209 sgtable.orig_nents = sgtable.nents;
4210 }
4211
4212 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4213 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4214 *sgl = sgtable.sgl;
4215 return p;
4216 }
4217
4218 static int
smb2_get_enc_key(struct TCP_Server_Info * server,__u64 ses_id,int enc,u8 * key)4219 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4220 {
4221 struct TCP_Server_Info *pserver;
4222 struct cifs_ses *ses;
4223 u8 *ses_enc_key;
4224
4225 /* If server is a channel, select the primary channel */
4226 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4227
4228 spin_lock(&cifs_tcp_ses_lock);
4229 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4230 if (ses->Suid == ses_id) {
4231 spin_lock(&ses->ses_lock);
4232 ses_enc_key = enc ? ses->smb3encryptionkey :
4233 ses->smb3decryptionkey;
4234 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4235 spin_unlock(&ses->ses_lock);
4236 spin_unlock(&cifs_tcp_ses_lock);
4237 return 0;
4238 }
4239 }
4240 spin_unlock(&cifs_tcp_ses_lock);
4241
4242 trace_smb3_ses_not_found(ses_id);
4243
4244 return -EAGAIN;
4245 }
4246 /*
4247 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4248 * iov[0] - transform header (associate data),
4249 * iov[1-N] - SMB2 header and pages - data to encrypt.
4250 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4251 * untouched.
4252 */
4253 static int
crypt_message(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * rqst,int enc,struct crypto_aead * tfm)4254 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4255 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm)
4256 {
4257 struct smb2_transform_hdr *tr_hdr =
4258 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4259 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4260 int rc = 0;
4261 struct scatterlist *sg;
4262 u8 sign[SMB2_SIGNATURE_SIZE] = {};
4263 u8 key[SMB3_ENC_DEC_KEY_SIZE];
4264 struct aead_request *req;
4265 u8 *iv;
4266 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4267 void *creq;
4268 size_t sensitive_size;
4269
4270 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4271 if (rc) {
4272 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4273 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4274 return rc;
4275 }
4276
4277 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4278 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4279 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4280 else
4281 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4282
4283 if (rc) {
4284 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4285 return rc;
4286 }
4287
4288 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4289 if (rc) {
4290 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4291 return rc;
4292 }
4293
4294 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4295 &sensitive_size);
4296 if (IS_ERR(creq))
4297 return PTR_ERR(creq);
4298
4299 if (!enc) {
4300 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4301 crypt_len += SMB2_SIGNATURE_SIZE;
4302 }
4303
4304 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4305 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4306 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4307 else {
4308 iv[0] = 3;
4309 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4310 }
4311
4312 aead_request_set_tfm(req, tfm);
4313 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4314 aead_request_set_ad(req, assoc_data_len);
4315
4316 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
4317
4318 if (!rc && enc)
4319 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4320
4321 kvfree_sensitive(creq, sensitive_size);
4322 return rc;
4323 }
4324
4325 /*
4326 * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4327 */
cifs_clear_xarray_buffer(struct xarray * buffer)4328 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4329 {
4330 struct folio *folio;
4331
4332 XA_STATE(xas, buffer, 0);
4333
4334 rcu_read_lock();
4335 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4336 folio_put(folio);
4337 }
4338 rcu_read_unlock();
4339 xa_destroy(buffer);
4340 }
4341
4342 void
smb3_free_compound_rqst(int num_rqst,struct smb_rqst * rqst)4343 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4344 {
4345 int i;
4346
4347 for (i = 0; i < num_rqst; i++)
4348 if (!xa_empty(&rqst[i].rq_buffer))
4349 cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4350 }
4351
4352 /*
4353 * This function will initialize new_rq and encrypt the content.
4354 * The first entry, new_rq[0], only contains a single iov which contains
4355 * a smb2_transform_hdr and is pre-allocated by the caller.
4356 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4357 *
4358 * The end result is an array of smb_rqst structures where the first structure
4359 * only contains a single iov for the transform header which we then can pass
4360 * to crypt_message().
4361 *
4362 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4363 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4364 */
4365 static int
smb3_init_transform_rq(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * new_rq,struct smb_rqst * old_rq)4366 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4367 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4368 {
4369 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4370 struct page *page;
4371 unsigned int orig_len = 0;
4372 int i, j;
4373 int rc = -ENOMEM;
4374
4375 for (i = 1; i < num_rqst; i++) {
4376 struct smb_rqst *old = &old_rq[i - 1];
4377 struct smb_rqst *new = &new_rq[i];
4378 struct xarray *buffer = &new->rq_buffer;
4379 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4380
4381 orig_len += smb_rqst_len(server, old);
4382 new->rq_iov = old->rq_iov;
4383 new->rq_nvec = old->rq_nvec;
4384
4385 xa_init(buffer);
4386
4387 if (size > 0) {
4388 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4389
4390 for (j = 0; j < npages; j++) {
4391 void *o;
4392
4393 rc = -ENOMEM;
4394 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4395 if (!page)
4396 goto err_free;
4397 page->index = j;
4398 o = xa_store(buffer, j, page, GFP_KERNEL);
4399 if (xa_is_err(o)) {
4400 rc = xa_err(o);
4401 put_page(page);
4402 goto err_free;
4403 }
4404
4405 xa_set_mark(buffer, j, XA_MARK_0);
4406
4407 seg = min_t(size_t, size - copied, PAGE_SIZE);
4408 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4409 rc = -EFAULT;
4410 goto err_free;
4411 }
4412 copied += seg;
4413 }
4414 iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4415 buffer, 0, size);
4416 new->rq_iter_size = size;
4417 }
4418 }
4419
4420 /* fill the 1st iov with a transform header */
4421 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4422
4423 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc);
4424 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4425 if (rc)
4426 goto err_free;
4427
4428 return rc;
4429
4430 err_free:
4431 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4432 return rc;
4433 }
4434
4435 static int
smb3_is_transform_hdr(void * buf)4436 smb3_is_transform_hdr(void *buf)
4437 {
4438 struct smb2_transform_hdr *trhdr = buf;
4439
4440 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4441 }
4442
4443 static int
decrypt_raw_data(struct TCP_Server_Info * server,char * buf,unsigned int buf_data_size,struct iov_iter * iter,bool is_offloaded)4444 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4445 unsigned int buf_data_size, struct iov_iter *iter,
4446 bool is_offloaded)
4447 {
4448 struct crypto_aead *tfm;
4449 struct smb_rqst rqst = {NULL};
4450 struct kvec iov[2];
4451 size_t iter_size = 0;
4452 int rc;
4453
4454 iov[0].iov_base = buf;
4455 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4456 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4457 iov[1].iov_len = buf_data_size;
4458
4459 rqst.rq_iov = iov;
4460 rqst.rq_nvec = 2;
4461 if (iter) {
4462 rqst.rq_iter = *iter;
4463 rqst.rq_iter_size = iov_iter_count(iter);
4464 iter_size = iov_iter_count(iter);
4465 }
4466
4467 if (is_offloaded) {
4468 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4469 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4470 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
4471 else
4472 tfm = crypto_alloc_aead("ccm(aes)", 0, 0);
4473 if (IS_ERR(tfm)) {
4474 rc = PTR_ERR(tfm);
4475 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc);
4476
4477 return rc;
4478 }
4479 } else {
4480 if (unlikely(!server->secmech.dec))
4481 return -EIO;
4482
4483 tfm = server->secmech.dec;
4484 }
4485
4486 rc = crypt_message(server, 1, &rqst, 0, tfm);
4487 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4488
4489 if (is_offloaded)
4490 crypto_free_aead(tfm);
4491
4492 if (rc)
4493 return rc;
4494
4495 memmove(buf, iov[1].iov_base, buf_data_size);
4496
4497 if (!is_offloaded)
4498 server->total_read = buf_data_size + iter_size;
4499
4500 return rc;
4501 }
4502
4503 static int
cifs_copy_pages_to_iter(struct xarray * pages,unsigned int data_size,unsigned int skip,struct iov_iter * iter)4504 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4505 unsigned int skip, struct iov_iter *iter)
4506 {
4507 struct page *page;
4508 unsigned long index;
4509
4510 xa_for_each(pages, index, page) {
4511 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4512
4513 n = copy_page_to_iter(page, skip, len, iter);
4514 if (n != len) {
4515 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4516 return -EIO;
4517 }
4518 data_size -= n;
4519 skip = 0;
4520 }
4521
4522 return 0;
4523 }
4524
4525 static int
handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid,char * buf,unsigned int buf_len,struct xarray * pages,unsigned int pages_len,bool is_offloaded)4526 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4527 char *buf, unsigned int buf_len, struct xarray *pages,
4528 unsigned int pages_len, bool is_offloaded)
4529 {
4530 unsigned int data_offset;
4531 unsigned int data_len;
4532 unsigned int cur_off;
4533 unsigned int cur_page_idx;
4534 unsigned int pad_len;
4535 struct cifs_readdata *rdata = mid->callback_data;
4536 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4537 int length;
4538 bool use_rdma_mr = false;
4539
4540 if (shdr->Command != SMB2_READ) {
4541 cifs_server_dbg(VFS, "only big read responses are supported\n");
4542 return -EOPNOTSUPP;
4543 }
4544
4545 if (server->ops->is_session_expired &&
4546 server->ops->is_session_expired(buf)) {
4547 if (!is_offloaded)
4548 cifs_reconnect(server, true);
4549 return -1;
4550 }
4551
4552 if (server->ops->is_status_pending &&
4553 server->ops->is_status_pending(buf, server))
4554 return -1;
4555
4556 /* set up first two iov to get credits */
4557 rdata->iov[0].iov_base = buf;
4558 rdata->iov[0].iov_len = 0;
4559 rdata->iov[1].iov_base = buf;
4560 rdata->iov[1].iov_len =
4561 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4562 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4563 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4564 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4565 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4566
4567 rdata->result = server->ops->map_error(buf, true);
4568 if (rdata->result != 0) {
4569 cifs_dbg(FYI, "%s: server returned error %d\n",
4570 __func__, rdata->result);
4571 /* normal error on read response */
4572 if (is_offloaded)
4573 mid->mid_state = MID_RESPONSE_RECEIVED;
4574 else
4575 dequeue_mid(mid, false);
4576 return 0;
4577 }
4578
4579 data_offset = server->ops->read_data_offset(buf);
4580 #ifdef CONFIG_CIFS_SMB_DIRECT
4581 use_rdma_mr = rdata->mr;
4582 #endif
4583 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4584
4585 if (data_offset < server->vals->read_rsp_size) {
4586 /*
4587 * win2k8 sometimes sends an offset of 0 when the read
4588 * is beyond the EOF. Treat it as if the data starts just after
4589 * the header.
4590 */
4591 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4592 __func__, data_offset);
4593 data_offset = server->vals->read_rsp_size;
4594 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4595 /* data_offset is beyond the end of smallbuf */
4596 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4597 __func__, data_offset);
4598 rdata->result = -EIO;
4599 if (is_offloaded)
4600 mid->mid_state = MID_RESPONSE_MALFORMED;
4601 else
4602 dequeue_mid(mid, rdata->result);
4603 return 0;
4604 }
4605
4606 pad_len = data_offset - server->vals->read_rsp_size;
4607
4608 if (buf_len <= data_offset) {
4609 /* read response payload is in pages */
4610 cur_page_idx = pad_len / PAGE_SIZE;
4611 cur_off = pad_len % PAGE_SIZE;
4612
4613 if (cur_page_idx != 0) {
4614 /* data offset is beyond the 1st page of response */
4615 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4616 __func__, data_offset);
4617 rdata->result = -EIO;
4618 if (is_offloaded)
4619 mid->mid_state = MID_RESPONSE_MALFORMED;
4620 else
4621 dequeue_mid(mid, rdata->result);
4622 return 0;
4623 }
4624
4625 if (data_len > pages_len - pad_len) {
4626 /* data_len is corrupt -- discard frame */
4627 rdata->result = -EIO;
4628 if (is_offloaded)
4629 mid->mid_state = MID_RESPONSE_MALFORMED;
4630 else
4631 dequeue_mid(mid, rdata->result);
4632 return 0;
4633 }
4634
4635 /* Copy the data to the output I/O iterator. */
4636 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4637 cur_off, &rdata->iter);
4638 if (rdata->result != 0) {
4639 if (is_offloaded)
4640 mid->mid_state = MID_RESPONSE_MALFORMED;
4641 else
4642 dequeue_mid(mid, rdata->result);
4643 return 0;
4644 }
4645 rdata->got_bytes = pages_len;
4646
4647 } else if (buf_len >= data_offset + data_len) {
4648 /* read response payload is in buf */
4649 WARN_ONCE(pages && !xa_empty(pages),
4650 "read data can be either in buf or in pages");
4651 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4652 if (length < 0)
4653 return length;
4654 rdata->got_bytes = data_len;
4655 } else {
4656 /* read response payload cannot be in both buf and pages */
4657 WARN_ONCE(1, "buf can not contain only a part of read data");
4658 rdata->result = -EIO;
4659 if (is_offloaded)
4660 mid->mid_state = MID_RESPONSE_MALFORMED;
4661 else
4662 dequeue_mid(mid, rdata->result);
4663 return 0;
4664 }
4665
4666 if (is_offloaded)
4667 mid->mid_state = MID_RESPONSE_RECEIVED;
4668 else
4669 dequeue_mid(mid, false);
4670 return 0;
4671 }
4672
4673 struct smb2_decrypt_work {
4674 struct work_struct decrypt;
4675 struct TCP_Server_Info *server;
4676 struct xarray buffer;
4677 char *buf;
4678 unsigned int len;
4679 };
4680
4681
smb2_decrypt_offload(struct work_struct * work)4682 static void smb2_decrypt_offload(struct work_struct *work)
4683 {
4684 struct smb2_decrypt_work *dw = container_of(work,
4685 struct smb2_decrypt_work, decrypt);
4686 int rc;
4687 struct mid_q_entry *mid;
4688 struct iov_iter iter;
4689
4690 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4691 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4692 &iter, true);
4693 if (rc) {
4694 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4695 goto free_pages;
4696 }
4697
4698 dw->server->lstrp = jiffies;
4699 mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4700 if (mid == NULL)
4701 cifs_dbg(FYI, "mid not found\n");
4702 else {
4703 mid->decrypted = true;
4704 rc = handle_read_data(dw->server, mid, dw->buf,
4705 dw->server->vals->read_rsp_size,
4706 &dw->buffer, dw->len,
4707 true);
4708 if (rc >= 0) {
4709 #ifdef CONFIG_CIFS_STATS2
4710 mid->when_received = jiffies;
4711 #endif
4712 if (dw->server->ops->is_network_name_deleted)
4713 dw->server->ops->is_network_name_deleted(dw->buf,
4714 dw->server);
4715
4716 mid->callback(mid);
4717 } else {
4718 spin_lock(&dw->server->srv_lock);
4719 if (dw->server->tcpStatus == CifsNeedReconnect) {
4720 spin_lock(&dw->server->mid_lock);
4721 mid->mid_state = MID_RETRY_NEEDED;
4722 spin_unlock(&dw->server->mid_lock);
4723 spin_unlock(&dw->server->srv_lock);
4724 mid->callback(mid);
4725 } else {
4726 spin_lock(&dw->server->mid_lock);
4727 mid->mid_state = MID_REQUEST_SUBMITTED;
4728 mid->mid_flags &= ~(MID_DELETED);
4729 list_add_tail(&mid->qhead,
4730 &dw->server->pending_mid_q);
4731 spin_unlock(&dw->server->mid_lock);
4732 spin_unlock(&dw->server->srv_lock);
4733 }
4734 }
4735 release_mid(mid);
4736 }
4737
4738 free_pages:
4739 cifs_clear_xarray_buffer(&dw->buffer);
4740 cifs_small_buf_release(dw->buf);
4741 kfree(dw);
4742 }
4743
4744
4745 static int
receive_encrypted_read(struct TCP_Server_Info * server,struct mid_q_entry ** mid,int * num_mids)4746 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4747 int *num_mids)
4748 {
4749 struct page *page;
4750 char *buf = server->smallbuf;
4751 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4752 struct iov_iter iter;
4753 unsigned int len, npages;
4754 unsigned int buflen = server->pdu_size;
4755 int rc;
4756 int i = 0;
4757 struct smb2_decrypt_work *dw;
4758
4759 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4760 if (!dw)
4761 return -ENOMEM;
4762 xa_init(&dw->buffer);
4763 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4764 dw->server = server;
4765
4766 *num_mids = 1;
4767 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4768 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4769
4770 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4771 if (rc < 0)
4772 goto free_dw;
4773 server->total_read += rc;
4774
4775 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4776 server->vals->read_rsp_size;
4777 dw->len = len;
4778 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4779
4780 rc = -ENOMEM;
4781 for (; i < npages; i++) {
4782 void *old;
4783
4784 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4785 if (!page)
4786 goto discard_data;
4787 page->index = i;
4788 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4789 if (xa_is_err(old)) {
4790 rc = xa_err(old);
4791 put_page(page);
4792 goto discard_data;
4793 }
4794 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4795 }
4796
4797 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4798
4799 /* Read the data into the buffer and clear excess bufferage. */
4800 rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4801 if (rc < 0)
4802 goto discard_data;
4803
4804 server->total_read += rc;
4805 if (rc < npages * PAGE_SIZE)
4806 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4807 iov_iter_revert(&iter, npages * PAGE_SIZE);
4808 iov_iter_truncate(&iter, dw->len);
4809
4810 rc = cifs_discard_remaining_data(server);
4811 if (rc)
4812 goto free_pages;
4813
4814 /*
4815 * For large reads, offload to different thread for better performance,
4816 * use more cores decrypting which can be expensive
4817 */
4818
4819 if ((server->min_offload) && (server->in_flight > 1) &&
4820 (server->pdu_size >= server->min_offload)) {
4821 dw->buf = server->smallbuf;
4822 server->smallbuf = (char *)cifs_small_buf_get();
4823
4824 queue_work(decrypt_wq, &dw->decrypt);
4825 *num_mids = 0; /* worker thread takes care of finding mid */
4826 return -1;
4827 }
4828
4829 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4830 &iter, false);
4831 if (rc)
4832 goto free_pages;
4833
4834 *mid = smb2_find_mid(server, buf);
4835 if (*mid == NULL) {
4836 cifs_dbg(FYI, "mid not found\n");
4837 } else {
4838 cifs_dbg(FYI, "mid found\n");
4839 (*mid)->decrypted = true;
4840 rc = handle_read_data(server, *mid, buf,
4841 server->vals->read_rsp_size,
4842 &dw->buffer, dw->len, false);
4843 if (rc >= 0) {
4844 if (server->ops->is_network_name_deleted) {
4845 server->ops->is_network_name_deleted(buf,
4846 server);
4847 }
4848 }
4849 }
4850
4851 free_pages:
4852 cifs_clear_xarray_buffer(&dw->buffer);
4853 free_dw:
4854 kfree(dw);
4855 return rc;
4856 discard_data:
4857 cifs_discard_remaining_data(server);
4858 goto free_pages;
4859 }
4860
4861 static int
receive_encrypted_standard(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4862 receive_encrypted_standard(struct TCP_Server_Info *server,
4863 struct mid_q_entry **mids, char **bufs,
4864 int *num_mids)
4865 {
4866 int ret, length;
4867 char *buf = server->smallbuf;
4868 struct smb2_hdr *shdr;
4869 unsigned int pdu_length = server->pdu_size;
4870 unsigned int buf_size;
4871 unsigned int next_cmd;
4872 struct mid_q_entry *mid_entry;
4873 int next_is_large;
4874 char *next_buffer = NULL;
4875
4876 *num_mids = 0;
4877
4878 /* switch to large buffer if too big for a small one */
4879 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4880 server->large_buf = true;
4881 memcpy(server->bigbuf, buf, server->total_read);
4882 buf = server->bigbuf;
4883 }
4884
4885 /* now read the rest */
4886 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4887 pdu_length - HEADER_SIZE(server) + 1);
4888 if (length < 0)
4889 return length;
4890 server->total_read += length;
4891
4892 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4893 length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4894 if (length)
4895 return length;
4896
4897 next_is_large = server->large_buf;
4898 one_more:
4899 shdr = (struct smb2_hdr *)buf;
4900 next_cmd = le32_to_cpu(shdr->NextCommand);
4901 if (next_cmd) {
4902 if (WARN_ON_ONCE(next_cmd > pdu_length))
4903 return -1;
4904 if (next_is_large)
4905 next_buffer = (char *)cifs_buf_get();
4906 else
4907 next_buffer = (char *)cifs_small_buf_get();
4908 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4909 }
4910
4911 mid_entry = smb2_find_mid(server, buf);
4912 if (mid_entry == NULL)
4913 cifs_dbg(FYI, "mid not found\n");
4914 else {
4915 cifs_dbg(FYI, "mid found\n");
4916 mid_entry->decrypted = true;
4917 mid_entry->resp_buf_size = server->pdu_size;
4918 }
4919
4920 if (*num_mids >= MAX_COMPOUND) {
4921 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4922 return -1;
4923 }
4924 bufs[*num_mids] = buf;
4925 mids[(*num_mids)++] = mid_entry;
4926
4927 if (mid_entry && mid_entry->handle)
4928 ret = mid_entry->handle(server, mid_entry);
4929 else
4930 ret = cifs_handle_standard(server, mid_entry);
4931
4932 if (ret == 0 && next_cmd) {
4933 pdu_length -= next_cmd;
4934 server->large_buf = next_is_large;
4935 if (next_is_large)
4936 server->bigbuf = buf = next_buffer;
4937 else
4938 server->smallbuf = buf = next_buffer;
4939 goto one_more;
4940 } else if (ret != 0) {
4941 /*
4942 * ret != 0 here means that we didn't get to handle_mid() thus
4943 * server->smallbuf and server->bigbuf are still valid. We need
4944 * to free next_buffer because it is not going to be used
4945 * anywhere.
4946 */
4947 if (next_is_large)
4948 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4949 else
4950 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4951 }
4952
4953 return ret;
4954 }
4955
4956 static int
smb3_receive_transform(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4957 smb3_receive_transform(struct TCP_Server_Info *server,
4958 struct mid_q_entry **mids, char **bufs, int *num_mids)
4959 {
4960 char *buf = server->smallbuf;
4961 unsigned int pdu_length = server->pdu_size;
4962 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4963 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4964
4965 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4966 sizeof(struct smb2_hdr)) {
4967 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4968 pdu_length);
4969 cifs_reconnect(server, true);
4970 return -ECONNABORTED;
4971 }
4972
4973 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4974 cifs_server_dbg(VFS, "Transform message is broken\n");
4975 cifs_reconnect(server, true);
4976 return -ECONNABORTED;
4977 }
4978
4979 /* TODO: add support for compounds containing READ. */
4980 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4981 return receive_encrypted_read(server, &mids[0], num_mids);
4982 }
4983
4984 return receive_encrypted_standard(server, mids, bufs, num_mids);
4985 }
4986
4987 int
smb3_handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid)4988 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4989 {
4990 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4991
4992 return handle_read_data(server, mid, buf, server->pdu_size,
4993 NULL, 0, false);
4994 }
4995
smb2_next_header(struct TCP_Server_Info * server,char * buf,unsigned int * noff)4996 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
4997 unsigned int *noff)
4998 {
4999 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5000 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5001
5002 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
5003 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
5004 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
5005 return -EINVAL;
5006 } else {
5007 *noff = le32_to_cpu(hdr->NextCommand);
5008 }
5009 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
5010 return -EINVAL;
5011 return 0;
5012 }
5013
__cifs_sfu_make_node(unsigned int xid,struct inode * inode,struct dentry * dentry,struct cifs_tcon * tcon,const char * full_path,umode_t mode,dev_t dev)5014 static int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5015 struct dentry *dentry, struct cifs_tcon *tcon,
5016 const char *full_path, umode_t mode, dev_t dev)
5017 {
5018 struct TCP_Server_Info *server = tcon->ses->server;
5019 struct cifs_open_parms oparms;
5020 struct cifs_io_parms io_parms = {};
5021 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5022 struct cifs_fid fid;
5023 unsigned int bytes_written;
5024 struct win_dev pdev = {};
5025 struct kvec iov[2];
5026 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
5027 int rc;
5028
5029 switch (mode & S_IFMT) {
5030 case S_IFCHR:
5031 strscpy(pdev.type, "IntxCHR", strlen("IntxChr"));
5032 pdev.major = cpu_to_le64(MAJOR(dev));
5033 pdev.minor = cpu_to_le64(MINOR(dev));
5034 break;
5035 case S_IFBLK:
5036 strscpy(pdev.type, "IntxBLK", strlen("IntxBLK"));
5037 pdev.major = cpu_to_le64(MAJOR(dev));
5038 pdev.minor = cpu_to_le64(MINOR(dev));
5039 break;
5040 case S_IFIFO:
5041 strscpy(pdev.type, "LnxFIFO", strlen("LnxFIFO"));
5042 break;
5043 default:
5044 return -EPERM;
5045 }
5046
5047 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE,
5048 FILE_CREATE, CREATE_NOT_DIR |
5049 CREATE_OPTION_SPECIAL, ACL_NO_MODE);
5050 oparms.fid = &fid;
5051
5052 rc = server->ops->open(xid, &oparms, &oplock, NULL);
5053 if (rc)
5054 return rc;
5055
5056 io_parms.pid = current->tgid;
5057 io_parms.tcon = tcon;
5058 io_parms.length = sizeof(pdev);
5059 iov[1].iov_base = &pdev;
5060 iov[1].iov_len = sizeof(pdev);
5061
5062 rc = server->ops->sync_write(xid, &fid, &io_parms,
5063 &bytes_written, iov, 1);
5064 server->ops->close(xid, tcon, &fid);
5065 return rc;
5066 }
5067
cifs_sfu_make_node(unsigned int xid,struct inode * inode,struct dentry * dentry,struct cifs_tcon * tcon,const char * full_path,umode_t mode,dev_t dev)5068 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5069 struct dentry *dentry, struct cifs_tcon *tcon,
5070 const char *full_path, umode_t mode, dev_t dev)
5071 {
5072 struct inode *new = NULL;
5073 int rc;
5074
5075 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon,
5076 full_path, mode, dev);
5077 if (rc)
5078 return rc;
5079
5080 if (tcon->posix_extensions) {
5081 rc = smb311_posix_get_inode_info(&new, full_path, NULL,
5082 inode->i_sb, xid);
5083 } else if (tcon->unix_ext) {
5084 rc = cifs_get_inode_info_unix(&new, full_path,
5085 inode->i_sb, xid);
5086 } else {
5087 rc = cifs_get_inode_info(&new, full_path, NULL,
5088 inode->i_sb, xid, NULL);
5089 }
5090 if (!rc)
5091 d_instantiate(dentry, new);
5092 return rc;
5093 }
5094
smb2_make_node(unsigned int xid,struct inode * inode,struct dentry * dentry,struct cifs_tcon * tcon,const char * full_path,umode_t mode,dev_t dev)5095 static int smb2_make_node(unsigned int xid, struct inode *inode,
5096 struct dentry *dentry, struct cifs_tcon *tcon,
5097 const char *full_path, umode_t mode, dev_t dev)
5098 {
5099 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5100 int rc;
5101
5102 /*
5103 * Check if mounted with mount parm 'sfu' mount parm.
5104 * SFU emulation should work with all servers, but only
5105 * supports block and char device (no socket & fifo),
5106 * and was used by default in earlier versions of Windows
5107 */
5108 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
5109 rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
5110 full_path, mode, dev);
5111 } else {
5112 rc = smb2_mknod_reparse(xid, inode, dentry, tcon,
5113 full_path, mode, dev);
5114 }
5115 return rc;
5116 }
5117
5118 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5119 struct smb_version_operations smb20_operations = {
5120 .compare_fids = smb2_compare_fids,
5121 .setup_request = smb2_setup_request,
5122 .setup_async_request = smb2_setup_async_request,
5123 .check_receive = smb2_check_receive,
5124 .add_credits = smb2_add_credits,
5125 .set_credits = smb2_set_credits,
5126 .get_credits_field = smb2_get_credits_field,
5127 .get_credits = smb2_get_credits,
5128 .wait_mtu_credits = cifs_wait_mtu_credits,
5129 .get_next_mid = smb2_get_next_mid,
5130 .revert_current_mid = smb2_revert_current_mid,
5131 .read_data_offset = smb2_read_data_offset,
5132 .read_data_length = smb2_read_data_length,
5133 .map_error = map_smb2_to_linux_error,
5134 .find_mid = smb2_find_mid,
5135 .check_message = smb2_check_message,
5136 .dump_detail = smb2_dump_detail,
5137 .clear_stats = smb2_clear_stats,
5138 .print_stats = smb2_print_stats,
5139 .is_oplock_break = smb2_is_valid_oplock_break,
5140 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5141 .downgrade_oplock = smb2_downgrade_oplock,
5142 .need_neg = smb2_need_neg,
5143 .negotiate = smb2_negotiate,
5144 .negotiate_wsize = smb2_negotiate_wsize,
5145 .negotiate_rsize = smb2_negotiate_rsize,
5146 .sess_setup = SMB2_sess_setup,
5147 .logoff = SMB2_logoff,
5148 .tree_connect = SMB2_tcon,
5149 .tree_disconnect = SMB2_tdis,
5150 .qfs_tcon = smb2_qfs_tcon,
5151 .is_path_accessible = smb2_is_path_accessible,
5152 .can_echo = smb2_can_echo,
5153 .echo = SMB2_echo,
5154 .query_path_info = smb2_query_path_info,
5155 .query_reparse_point = smb2_query_reparse_point,
5156 .get_srv_inum = smb2_get_srv_inum,
5157 .query_file_info = smb2_query_file_info,
5158 .set_path_size = smb2_set_path_size,
5159 .set_file_size = smb2_set_file_size,
5160 .set_file_info = smb2_set_file_info,
5161 .set_compression = smb2_set_compression,
5162 .mkdir = smb2_mkdir,
5163 .mkdir_setinfo = smb2_mkdir_setinfo,
5164 .rmdir = smb2_rmdir,
5165 .unlink = smb2_unlink,
5166 .rename = smb2_rename_path,
5167 .create_hardlink = smb2_create_hardlink,
5168 .parse_reparse_point = smb2_parse_reparse_point,
5169 .query_mf_symlink = smb3_query_mf_symlink,
5170 .create_mf_symlink = smb3_create_mf_symlink,
5171 .create_reparse_symlink = smb2_create_reparse_symlink,
5172 .open = smb2_open_file,
5173 .set_fid = smb2_set_fid,
5174 .close = smb2_close_file,
5175 .flush = smb2_flush_file,
5176 .async_readv = smb2_async_readv,
5177 .async_writev = smb2_async_writev,
5178 .sync_read = smb2_sync_read,
5179 .sync_write = smb2_sync_write,
5180 .query_dir_first = smb2_query_dir_first,
5181 .query_dir_next = smb2_query_dir_next,
5182 .close_dir = smb2_close_dir,
5183 .calc_smb_size = smb2_calc_size,
5184 .is_status_pending = smb2_is_status_pending,
5185 .is_session_expired = smb2_is_session_expired,
5186 .oplock_response = smb2_oplock_response,
5187 .queryfs = smb2_queryfs,
5188 .mand_lock = smb2_mand_lock,
5189 .mand_unlock_range = smb2_unlock_range,
5190 .push_mand_locks = smb2_push_mandatory_locks,
5191 .get_lease_key = smb2_get_lease_key,
5192 .set_lease_key = smb2_set_lease_key,
5193 .new_lease_key = smb2_new_lease_key,
5194 .calc_signature = smb2_calc_signature,
5195 .is_read_op = smb2_is_read_op,
5196 .set_oplock_level = smb2_set_oplock_level,
5197 .create_lease_buf = smb2_create_lease_buf,
5198 .parse_lease_buf = smb2_parse_lease_buf,
5199 .copychunk_range = smb2_copychunk_range,
5200 .wp_retry_size = smb2_wp_retry_size,
5201 .dir_needs_close = smb2_dir_needs_close,
5202 .get_dfs_refer = smb2_get_dfs_refer,
5203 .select_sectype = smb2_select_sectype,
5204 #ifdef CONFIG_CIFS_XATTR
5205 .query_all_EAs = smb2_query_eas,
5206 .set_EA = smb2_set_ea,
5207 #endif /* CIFS_XATTR */
5208 .get_acl = get_smb2_acl,
5209 .get_acl_by_fid = get_smb2_acl_by_fid,
5210 .set_acl = set_smb2_acl,
5211 .next_header = smb2_next_header,
5212 .ioctl_query_info = smb2_ioctl_query_info,
5213 .make_node = smb2_make_node,
5214 .fiemap = smb3_fiemap,
5215 .llseek = smb3_llseek,
5216 .is_status_io_timeout = smb2_is_status_io_timeout,
5217 .is_network_name_deleted = smb2_is_network_name_deleted,
5218 };
5219 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5220
5221 struct smb_version_operations smb21_operations = {
5222 .compare_fids = smb2_compare_fids,
5223 .setup_request = smb2_setup_request,
5224 .setup_async_request = smb2_setup_async_request,
5225 .check_receive = smb2_check_receive,
5226 .add_credits = smb2_add_credits,
5227 .set_credits = smb2_set_credits,
5228 .get_credits_field = smb2_get_credits_field,
5229 .get_credits = smb2_get_credits,
5230 .wait_mtu_credits = smb2_wait_mtu_credits,
5231 .adjust_credits = smb2_adjust_credits,
5232 .get_next_mid = smb2_get_next_mid,
5233 .revert_current_mid = smb2_revert_current_mid,
5234 .read_data_offset = smb2_read_data_offset,
5235 .read_data_length = smb2_read_data_length,
5236 .map_error = map_smb2_to_linux_error,
5237 .find_mid = smb2_find_mid,
5238 .check_message = smb2_check_message,
5239 .dump_detail = smb2_dump_detail,
5240 .clear_stats = smb2_clear_stats,
5241 .print_stats = smb2_print_stats,
5242 .is_oplock_break = smb2_is_valid_oplock_break,
5243 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5244 .downgrade_oplock = smb2_downgrade_oplock,
5245 .need_neg = smb2_need_neg,
5246 .negotiate = smb2_negotiate,
5247 .negotiate_wsize = smb2_negotiate_wsize,
5248 .negotiate_rsize = smb2_negotiate_rsize,
5249 .sess_setup = SMB2_sess_setup,
5250 .logoff = SMB2_logoff,
5251 .tree_connect = SMB2_tcon,
5252 .tree_disconnect = SMB2_tdis,
5253 .qfs_tcon = smb2_qfs_tcon,
5254 .is_path_accessible = smb2_is_path_accessible,
5255 .can_echo = smb2_can_echo,
5256 .echo = SMB2_echo,
5257 .query_path_info = smb2_query_path_info,
5258 .query_reparse_point = smb2_query_reparse_point,
5259 .get_srv_inum = smb2_get_srv_inum,
5260 .query_file_info = smb2_query_file_info,
5261 .set_path_size = smb2_set_path_size,
5262 .set_file_size = smb2_set_file_size,
5263 .set_file_info = smb2_set_file_info,
5264 .set_compression = smb2_set_compression,
5265 .mkdir = smb2_mkdir,
5266 .mkdir_setinfo = smb2_mkdir_setinfo,
5267 .rmdir = smb2_rmdir,
5268 .unlink = smb2_unlink,
5269 .rename = smb2_rename_path,
5270 .create_hardlink = smb2_create_hardlink,
5271 .parse_reparse_point = smb2_parse_reparse_point,
5272 .query_mf_symlink = smb3_query_mf_symlink,
5273 .create_mf_symlink = smb3_create_mf_symlink,
5274 .create_reparse_symlink = smb2_create_reparse_symlink,
5275 .open = smb2_open_file,
5276 .set_fid = smb2_set_fid,
5277 .close = smb2_close_file,
5278 .flush = smb2_flush_file,
5279 .async_readv = smb2_async_readv,
5280 .async_writev = smb2_async_writev,
5281 .sync_read = smb2_sync_read,
5282 .sync_write = smb2_sync_write,
5283 .query_dir_first = smb2_query_dir_first,
5284 .query_dir_next = smb2_query_dir_next,
5285 .close_dir = smb2_close_dir,
5286 .calc_smb_size = smb2_calc_size,
5287 .is_status_pending = smb2_is_status_pending,
5288 .is_session_expired = smb2_is_session_expired,
5289 .oplock_response = smb2_oplock_response,
5290 .queryfs = smb2_queryfs,
5291 .mand_lock = smb2_mand_lock,
5292 .mand_unlock_range = smb2_unlock_range,
5293 .push_mand_locks = smb2_push_mandatory_locks,
5294 .get_lease_key = smb2_get_lease_key,
5295 .set_lease_key = smb2_set_lease_key,
5296 .new_lease_key = smb2_new_lease_key,
5297 .calc_signature = smb2_calc_signature,
5298 .is_read_op = smb21_is_read_op,
5299 .set_oplock_level = smb21_set_oplock_level,
5300 .create_lease_buf = smb2_create_lease_buf,
5301 .parse_lease_buf = smb2_parse_lease_buf,
5302 .copychunk_range = smb2_copychunk_range,
5303 .wp_retry_size = smb2_wp_retry_size,
5304 .dir_needs_close = smb2_dir_needs_close,
5305 .enum_snapshots = smb3_enum_snapshots,
5306 .notify = smb3_notify,
5307 .get_dfs_refer = smb2_get_dfs_refer,
5308 .select_sectype = smb2_select_sectype,
5309 #ifdef CONFIG_CIFS_XATTR
5310 .query_all_EAs = smb2_query_eas,
5311 .set_EA = smb2_set_ea,
5312 #endif /* CIFS_XATTR */
5313 .get_acl = get_smb2_acl,
5314 .get_acl_by_fid = get_smb2_acl_by_fid,
5315 .set_acl = set_smb2_acl,
5316 .next_header = smb2_next_header,
5317 .ioctl_query_info = smb2_ioctl_query_info,
5318 .make_node = smb2_make_node,
5319 .fiemap = smb3_fiemap,
5320 .llseek = smb3_llseek,
5321 .is_status_io_timeout = smb2_is_status_io_timeout,
5322 .is_network_name_deleted = smb2_is_network_name_deleted,
5323 };
5324
5325 struct smb_version_operations smb30_operations = {
5326 .compare_fids = smb2_compare_fids,
5327 .setup_request = smb2_setup_request,
5328 .setup_async_request = smb2_setup_async_request,
5329 .check_receive = smb2_check_receive,
5330 .add_credits = smb2_add_credits,
5331 .set_credits = smb2_set_credits,
5332 .get_credits_field = smb2_get_credits_field,
5333 .get_credits = smb2_get_credits,
5334 .wait_mtu_credits = smb2_wait_mtu_credits,
5335 .adjust_credits = smb2_adjust_credits,
5336 .get_next_mid = smb2_get_next_mid,
5337 .revert_current_mid = smb2_revert_current_mid,
5338 .read_data_offset = smb2_read_data_offset,
5339 .read_data_length = smb2_read_data_length,
5340 .map_error = map_smb2_to_linux_error,
5341 .find_mid = smb2_find_mid,
5342 .check_message = smb2_check_message,
5343 .dump_detail = smb2_dump_detail,
5344 .clear_stats = smb2_clear_stats,
5345 .print_stats = smb2_print_stats,
5346 .dump_share_caps = smb2_dump_share_caps,
5347 .is_oplock_break = smb2_is_valid_oplock_break,
5348 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5349 .downgrade_oplock = smb3_downgrade_oplock,
5350 .need_neg = smb2_need_neg,
5351 .negotiate = smb2_negotiate,
5352 .negotiate_wsize = smb3_negotiate_wsize,
5353 .negotiate_rsize = smb3_negotiate_rsize,
5354 .sess_setup = SMB2_sess_setup,
5355 .logoff = SMB2_logoff,
5356 .tree_connect = SMB2_tcon,
5357 .tree_disconnect = SMB2_tdis,
5358 .qfs_tcon = smb3_qfs_tcon,
5359 .query_server_interfaces = SMB3_request_interfaces,
5360 .is_path_accessible = smb2_is_path_accessible,
5361 .can_echo = smb2_can_echo,
5362 .echo = SMB2_echo,
5363 .query_path_info = smb2_query_path_info,
5364 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5365 .query_reparse_point = smb2_query_reparse_point,
5366 .get_srv_inum = smb2_get_srv_inum,
5367 .query_file_info = smb2_query_file_info,
5368 .set_path_size = smb2_set_path_size,
5369 .set_file_size = smb2_set_file_size,
5370 .set_file_info = smb2_set_file_info,
5371 .set_compression = smb2_set_compression,
5372 .mkdir = smb2_mkdir,
5373 .mkdir_setinfo = smb2_mkdir_setinfo,
5374 .rmdir = smb2_rmdir,
5375 .unlink = smb2_unlink,
5376 .rename = smb2_rename_path,
5377 .create_hardlink = smb2_create_hardlink,
5378 .parse_reparse_point = smb2_parse_reparse_point,
5379 .query_mf_symlink = smb3_query_mf_symlink,
5380 .create_mf_symlink = smb3_create_mf_symlink,
5381 .create_reparse_symlink = smb2_create_reparse_symlink,
5382 .open = smb2_open_file,
5383 .set_fid = smb2_set_fid,
5384 .close = smb2_close_file,
5385 .close_getattr = smb2_close_getattr,
5386 .flush = smb2_flush_file,
5387 .async_readv = smb2_async_readv,
5388 .async_writev = smb2_async_writev,
5389 .sync_read = smb2_sync_read,
5390 .sync_write = smb2_sync_write,
5391 .query_dir_first = smb2_query_dir_first,
5392 .query_dir_next = smb2_query_dir_next,
5393 .close_dir = smb2_close_dir,
5394 .calc_smb_size = smb2_calc_size,
5395 .is_status_pending = smb2_is_status_pending,
5396 .is_session_expired = smb2_is_session_expired,
5397 .oplock_response = smb2_oplock_response,
5398 .queryfs = smb2_queryfs,
5399 .mand_lock = smb2_mand_lock,
5400 .mand_unlock_range = smb2_unlock_range,
5401 .push_mand_locks = smb2_push_mandatory_locks,
5402 .get_lease_key = smb2_get_lease_key,
5403 .set_lease_key = smb2_set_lease_key,
5404 .new_lease_key = smb2_new_lease_key,
5405 .generate_signingkey = generate_smb30signingkey,
5406 .calc_signature = smb3_calc_signature,
5407 .set_integrity = smb3_set_integrity,
5408 .is_read_op = smb21_is_read_op,
5409 .set_oplock_level = smb3_set_oplock_level,
5410 .create_lease_buf = smb3_create_lease_buf,
5411 .parse_lease_buf = smb3_parse_lease_buf,
5412 .copychunk_range = smb2_copychunk_range,
5413 .duplicate_extents = smb2_duplicate_extents,
5414 .validate_negotiate = smb3_validate_negotiate,
5415 .wp_retry_size = smb2_wp_retry_size,
5416 .dir_needs_close = smb2_dir_needs_close,
5417 .fallocate = smb3_fallocate,
5418 .enum_snapshots = smb3_enum_snapshots,
5419 .notify = smb3_notify,
5420 .init_transform_rq = smb3_init_transform_rq,
5421 .is_transform_hdr = smb3_is_transform_hdr,
5422 .receive_transform = smb3_receive_transform,
5423 .get_dfs_refer = smb2_get_dfs_refer,
5424 .select_sectype = smb2_select_sectype,
5425 #ifdef CONFIG_CIFS_XATTR
5426 .query_all_EAs = smb2_query_eas,
5427 .set_EA = smb2_set_ea,
5428 #endif /* CIFS_XATTR */
5429 .get_acl = get_smb2_acl,
5430 .get_acl_by_fid = get_smb2_acl_by_fid,
5431 .set_acl = set_smb2_acl,
5432 .next_header = smb2_next_header,
5433 .ioctl_query_info = smb2_ioctl_query_info,
5434 .make_node = smb2_make_node,
5435 .fiemap = smb3_fiemap,
5436 .llseek = smb3_llseek,
5437 .is_status_io_timeout = smb2_is_status_io_timeout,
5438 .is_network_name_deleted = smb2_is_network_name_deleted,
5439 };
5440
5441 struct smb_version_operations smb311_operations = {
5442 .compare_fids = smb2_compare_fids,
5443 .setup_request = smb2_setup_request,
5444 .setup_async_request = smb2_setup_async_request,
5445 .check_receive = smb2_check_receive,
5446 .add_credits = smb2_add_credits,
5447 .set_credits = smb2_set_credits,
5448 .get_credits_field = smb2_get_credits_field,
5449 .get_credits = smb2_get_credits,
5450 .wait_mtu_credits = smb2_wait_mtu_credits,
5451 .adjust_credits = smb2_adjust_credits,
5452 .get_next_mid = smb2_get_next_mid,
5453 .revert_current_mid = smb2_revert_current_mid,
5454 .read_data_offset = smb2_read_data_offset,
5455 .read_data_length = smb2_read_data_length,
5456 .map_error = map_smb2_to_linux_error,
5457 .find_mid = smb2_find_mid,
5458 .check_message = smb2_check_message,
5459 .dump_detail = smb2_dump_detail,
5460 .clear_stats = smb2_clear_stats,
5461 .print_stats = smb2_print_stats,
5462 .dump_share_caps = smb2_dump_share_caps,
5463 .is_oplock_break = smb2_is_valid_oplock_break,
5464 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5465 .downgrade_oplock = smb3_downgrade_oplock,
5466 .need_neg = smb2_need_neg,
5467 .negotiate = smb2_negotiate,
5468 .negotiate_wsize = smb3_negotiate_wsize,
5469 .negotiate_rsize = smb3_negotiate_rsize,
5470 .sess_setup = SMB2_sess_setup,
5471 .logoff = SMB2_logoff,
5472 .tree_connect = SMB2_tcon,
5473 .tree_disconnect = SMB2_tdis,
5474 .qfs_tcon = smb3_qfs_tcon,
5475 .query_server_interfaces = SMB3_request_interfaces,
5476 .is_path_accessible = smb2_is_path_accessible,
5477 .can_echo = smb2_can_echo,
5478 .echo = SMB2_echo,
5479 .query_path_info = smb2_query_path_info,
5480 .query_reparse_point = smb2_query_reparse_point,
5481 .get_srv_inum = smb2_get_srv_inum,
5482 .query_file_info = smb2_query_file_info,
5483 .set_path_size = smb2_set_path_size,
5484 .set_file_size = smb2_set_file_size,
5485 .set_file_info = smb2_set_file_info,
5486 .set_compression = smb2_set_compression,
5487 .mkdir = smb2_mkdir,
5488 .mkdir_setinfo = smb2_mkdir_setinfo,
5489 .posix_mkdir = smb311_posix_mkdir,
5490 .rmdir = smb2_rmdir,
5491 .unlink = smb2_unlink,
5492 .rename = smb2_rename_path,
5493 .create_hardlink = smb2_create_hardlink,
5494 .parse_reparse_point = smb2_parse_reparse_point,
5495 .query_mf_symlink = smb3_query_mf_symlink,
5496 .create_mf_symlink = smb3_create_mf_symlink,
5497 .create_reparse_symlink = smb2_create_reparse_symlink,
5498 .open = smb2_open_file,
5499 .set_fid = smb2_set_fid,
5500 .close = smb2_close_file,
5501 .close_getattr = smb2_close_getattr,
5502 .flush = smb2_flush_file,
5503 .async_readv = smb2_async_readv,
5504 .async_writev = smb2_async_writev,
5505 .sync_read = smb2_sync_read,
5506 .sync_write = smb2_sync_write,
5507 .query_dir_first = smb2_query_dir_first,
5508 .query_dir_next = smb2_query_dir_next,
5509 .close_dir = smb2_close_dir,
5510 .calc_smb_size = smb2_calc_size,
5511 .is_status_pending = smb2_is_status_pending,
5512 .is_session_expired = smb2_is_session_expired,
5513 .oplock_response = smb2_oplock_response,
5514 .queryfs = smb311_queryfs,
5515 .mand_lock = smb2_mand_lock,
5516 .mand_unlock_range = smb2_unlock_range,
5517 .push_mand_locks = smb2_push_mandatory_locks,
5518 .get_lease_key = smb2_get_lease_key,
5519 .set_lease_key = smb2_set_lease_key,
5520 .new_lease_key = smb2_new_lease_key,
5521 .generate_signingkey = generate_smb311signingkey,
5522 .calc_signature = smb3_calc_signature,
5523 .set_integrity = smb3_set_integrity,
5524 .is_read_op = smb21_is_read_op,
5525 .set_oplock_level = smb3_set_oplock_level,
5526 .create_lease_buf = smb3_create_lease_buf,
5527 .parse_lease_buf = smb3_parse_lease_buf,
5528 .copychunk_range = smb2_copychunk_range,
5529 .duplicate_extents = smb2_duplicate_extents,
5530 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5531 .wp_retry_size = smb2_wp_retry_size,
5532 .dir_needs_close = smb2_dir_needs_close,
5533 .fallocate = smb3_fallocate,
5534 .enum_snapshots = smb3_enum_snapshots,
5535 .notify = smb3_notify,
5536 .init_transform_rq = smb3_init_transform_rq,
5537 .is_transform_hdr = smb3_is_transform_hdr,
5538 .receive_transform = smb3_receive_transform,
5539 .get_dfs_refer = smb2_get_dfs_refer,
5540 .select_sectype = smb2_select_sectype,
5541 #ifdef CONFIG_CIFS_XATTR
5542 .query_all_EAs = smb2_query_eas,
5543 .set_EA = smb2_set_ea,
5544 #endif /* CIFS_XATTR */
5545 .get_acl = get_smb2_acl,
5546 .get_acl_by_fid = get_smb2_acl_by_fid,
5547 .set_acl = set_smb2_acl,
5548 .next_header = smb2_next_header,
5549 .ioctl_query_info = smb2_ioctl_query_info,
5550 .make_node = smb2_make_node,
5551 .fiemap = smb3_fiemap,
5552 .llseek = smb3_llseek,
5553 .is_status_io_timeout = smb2_is_status_io_timeout,
5554 .is_network_name_deleted = smb2_is_network_name_deleted,
5555 };
5556
5557 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5558 struct smb_version_values smb20_values = {
5559 .version_string = SMB20_VERSION_STRING,
5560 .protocol_id = SMB20_PROT_ID,
5561 .req_capabilities = 0, /* MBZ */
5562 .large_lock_type = 0,
5563 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5564 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5565 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5566 .header_size = sizeof(struct smb2_hdr),
5567 .header_preamble_size = 0,
5568 .max_header_size = MAX_SMB2_HDR_SIZE,
5569 .read_rsp_size = sizeof(struct smb2_read_rsp),
5570 .lock_cmd = SMB2_LOCK,
5571 .cap_unix = 0,
5572 .cap_nt_find = SMB2_NT_FIND,
5573 .cap_large_files = SMB2_LARGE_FILES,
5574 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5575 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5576 .create_lease_size = sizeof(struct create_lease),
5577 };
5578 #endif /* ALLOW_INSECURE_LEGACY */
5579
5580 struct smb_version_values smb21_values = {
5581 .version_string = SMB21_VERSION_STRING,
5582 .protocol_id = SMB21_PROT_ID,
5583 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5584 .large_lock_type = 0,
5585 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5586 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5587 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5588 .header_size = sizeof(struct smb2_hdr),
5589 .header_preamble_size = 0,
5590 .max_header_size = MAX_SMB2_HDR_SIZE,
5591 .read_rsp_size = sizeof(struct smb2_read_rsp),
5592 .lock_cmd = SMB2_LOCK,
5593 .cap_unix = 0,
5594 .cap_nt_find = SMB2_NT_FIND,
5595 .cap_large_files = SMB2_LARGE_FILES,
5596 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5597 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5598 .create_lease_size = sizeof(struct create_lease),
5599 };
5600
5601 struct smb_version_values smb3any_values = {
5602 .version_string = SMB3ANY_VERSION_STRING,
5603 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5604 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5605 .large_lock_type = 0,
5606 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5607 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5608 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5609 .header_size = sizeof(struct smb2_hdr),
5610 .header_preamble_size = 0,
5611 .max_header_size = MAX_SMB2_HDR_SIZE,
5612 .read_rsp_size = sizeof(struct smb2_read_rsp),
5613 .lock_cmd = SMB2_LOCK,
5614 .cap_unix = 0,
5615 .cap_nt_find = SMB2_NT_FIND,
5616 .cap_large_files = SMB2_LARGE_FILES,
5617 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5618 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5619 .create_lease_size = sizeof(struct create_lease_v2),
5620 };
5621
5622 struct smb_version_values smbdefault_values = {
5623 .version_string = SMBDEFAULT_VERSION_STRING,
5624 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5625 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5626 .large_lock_type = 0,
5627 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5628 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5629 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5630 .header_size = sizeof(struct smb2_hdr),
5631 .header_preamble_size = 0,
5632 .max_header_size = MAX_SMB2_HDR_SIZE,
5633 .read_rsp_size = sizeof(struct smb2_read_rsp),
5634 .lock_cmd = SMB2_LOCK,
5635 .cap_unix = 0,
5636 .cap_nt_find = SMB2_NT_FIND,
5637 .cap_large_files = SMB2_LARGE_FILES,
5638 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5639 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5640 .create_lease_size = sizeof(struct create_lease_v2),
5641 };
5642
5643 struct smb_version_values smb30_values = {
5644 .version_string = SMB30_VERSION_STRING,
5645 .protocol_id = SMB30_PROT_ID,
5646 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5647 .large_lock_type = 0,
5648 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5649 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5650 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5651 .header_size = sizeof(struct smb2_hdr),
5652 .header_preamble_size = 0,
5653 .max_header_size = MAX_SMB2_HDR_SIZE,
5654 .read_rsp_size = sizeof(struct smb2_read_rsp),
5655 .lock_cmd = SMB2_LOCK,
5656 .cap_unix = 0,
5657 .cap_nt_find = SMB2_NT_FIND,
5658 .cap_large_files = SMB2_LARGE_FILES,
5659 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5660 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5661 .create_lease_size = sizeof(struct create_lease_v2),
5662 };
5663
5664 struct smb_version_values smb302_values = {
5665 .version_string = SMB302_VERSION_STRING,
5666 .protocol_id = SMB302_PROT_ID,
5667 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5668 .large_lock_type = 0,
5669 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5670 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5671 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5672 .header_size = sizeof(struct smb2_hdr),
5673 .header_preamble_size = 0,
5674 .max_header_size = MAX_SMB2_HDR_SIZE,
5675 .read_rsp_size = sizeof(struct smb2_read_rsp),
5676 .lock_cmd = SMB2_LOCK,
5677 .cap_unix = 0,
5678 .cap_nt_find = SMB2_NT_FIND,
5679 .cap_large_files = SMB2_LARGE_FILES,
5680 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5681 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5682 .create_lease_size = sizeof(struct create_lease_v2),
5683 };
5684
5685 struct smb_version_values smb311_values = {
5686 .version_string = SMB311_VERSION_STRING,
5687 .protocol_id = SMB311_PROT_ID,
5688 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5689 .large_lock_type = 0,
5690 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5691 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5692 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5693 .header_size = sizeof(struct smb2_hdr),
5694 .header_preamble_size = 0,
5695 .max_header_size = MAX_SMB2_HDR_SIZE,
5696 .read_rsp_size = sizeof(struct smb2_read_rsp),
5697 .lock_cmd = SMB2_LOCK,
5698 .cap_unix = 0,
5699 .cap_nt_find = SMB2_NT_FIND,
5700 .cap_large_files = SMB2_LARGE_FILES,
5701 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5702 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5703 .create_lease_size = sizeof(struct create_lease_v2),
5704 };
5705