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cifs: update iface_last_update on each query-and-update
[thirdparty/linux.git] / fs / smb / client / smb2ops.c
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
32 /* Change credits for different ops and return the total number of credits */
33 static int
34 change_conf(struct TCP_Server_Info *server)
35 {
36 server->credits += server->echo_credits + server->oplock_credits;
37 if (server->credits > server->max_credits)
38 server->credits = server->max_credits;
39 server->oplock_credits = server->echo_credits = 0;
40 switch (server->credits) {
41 case 0:
42 return 0;
43 case 1:
44 server->echoes = false;
45 server->oplocks = false;
46 break;
47 case 2:
48 server->echoes = true;
49 server->oplocks = false;
50 server->echo_credits = 1;
51 break;
52 default:
53 server->echoes = true;
54 if (enable_oplocks) {
55 server->oplocks = true;
56 server->oplock_credits = 1;
57 } else
58 server->oplocks = false;
59
60 server->echo_credits = 1;
61 }
62 server->credits -= server->echo_credits + server->oplock_credits;
63 return server->credits + server->echo_credits + server->oplock_credits;
64 }
65
66 static void
67 smb2_add_credits(struct TCP_Server_Info *server,
68 const struct cifs_credits *credits, const int optype)
69 {
70 int *val, rc = -1;
71 int scredits, in_flight;
72 unsigned int add = credits->value;
73 unsigned int instance = credits->instance;
74 bool reconnect_detected = false;
75 bool reconnect_with_invalid_credits = false;
76
77 spin_lock(&server->req_lock);
78 val = server->ops->get_credits_field(server, optype);
79
80 /* eg found case where write overlapping reconnect messed up credits */
81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
82 reconnect_with_invalid_credits = true;
83
84 if ((instance == 0) || (instance == server->reconnect_instance))
85 *val += add;
86 else
87 reconnect_detected = true;
88
89 if (*val > 65000) {
90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
91 pr_warn_once("server overflowed SMB3 credits\n");
92 trace_smb3_overflow_credits(server->CurrentMid,
93 server->conn_id, server->hostname, *val,
94 add, server->in_flight);
95 }
96 WARN_ON_ONCE(server->in_flight == 0);
97 server->in_flight--;
98 if (server->in_flight == 0 &&
99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
101 rc = change_conf(server);
102 /*
103 * Sometimes server returns 0 credits on oplock break ack - we need to
104 * rebalance credits in this case.
105 */
106 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
107 server->oplocks) {
108 if (server->credits > 1) {
109 server->credits--;
110 server->oplock_credits++;
111 }
112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
114 /* if now have too many oplock credits, rebalance so don't starve normal ops */
115 change_conf(server);
116
117 scredits = *val;
118 in_flight = server->in_flight;
119 spin_unlock(&server->req_lock);
120 wake_up(&server->request_q);
121
122 if (reconnect_detected) {
123 trace_smb3_reconnect_detected(server->CurrentMid,
124 server->conn_id, server->hostname, scredits, add, in_flight);
125
126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
127 add, instance);
128 }
129
130 if (reconnect_with_invalid_credits) {
131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
132 server->conn_id, server->hostname, scredits, add, in_flight);
133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
134 optype, scredits, add);
135 }
136
137 spin_lock(&server->srv_lock);
138 if (server->tcpStatus == CifsNeedReconnect
139 || server->tcpStatus == CifsExiting) {
140 spin_unlock(&server->srv_lock);
141 return;
142 }
143 spin_unlock(&server->srv_lock);
144
145 switch (rc) {
146 case -1:
147 /* change_conf hasn't been executed */
148 break;
149 case 0:
150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
151 break;
152 case 1:
153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
154 break;
155 case 2:
156 cifs_dbg(FYI, "disabling oplocks\n");
157 break;
158 default:
159 /* change_conf rebalanced credits for different types */
160 break;
161 }
162
163 trace_smb3_add_credits(server->CurrentMid,
164 server->conn_id, server->hostname, scredits, add, in_flight);
165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
166 }
167
168 static void
169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
170 {
171 int scredits, in_flight;
172
173 spin_lock(&server->req_lock);
174 server->credits = val;
175 if (val == 1) {
176 server->reconnect_instance++;
177 /*
178 * ChannelSequence updated for all channels in primary channel so that consistent
179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
180 */
181 if (SERVER_IS_CHAN(server))
182 server->primary_server->channel_sequence_num++;
183 else
184 server->channel_sequence_num++;
185 }
186 scredits = server->credits;
187 in_flight = server->in_flight;
188 spin_unlock(&server->req_lock);
189
190 trace_smb3_set_credits(server->CurrentMid,
191 server->conn_id, server->hostname, scredits, val, in_flight);
192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
193
194 /* don't log while holding the lock */
195 if (val == 1)
196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
197 }
198
199 static int *
200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
201 {
202 switch (optype) {
203 case CIFS_ECHO_OP:
204 return &server->echo_credits;
205 case CIFS_OBREAK_OP:
206 return &server->oplock_credits;
207 default:
208 return &server->credits;
209 }
210 }
211
212 static unsigned int
213 smb2_get_credits(struct mid_q_entry *mid)
214 {
215 return mid->credits_received;
216 }
217
218 static int
219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
220 unsigned int *num, struct cifs_credits *credits)
221 {
222 int rc = 0;
223 unsigned int scredits, in_flight;
224
225 spin_lock(&server->req_lock);
226 while (1) {
227 spin_unlock(&server->req_lock);
228
229 spin_lock(&server->srv_lock);
230 if (server->tcpStatus == CifsExiting) {
231 spin_unlock(&server->srv_lock);
232 return -ENOENT;
233 }
234 spin_unlock(&server->srv_lock);
235
236 spin_lock(&server->req_lock);
237 if (server->credits <= 0) {
238 spin_unlock(&server->req_lock);
239 cifs_num_waiters_inc(server);
240 rc = wait_event_killable(server->request_q,
241 has_credits(server, &server->credits, 1));
242 cifs_num_waiters_dec(server);
243 if (rc)
244 return rc;
245 spin_lock(&server->req_lock);
246 } else {
247 scredits = server->credits;
248 /* can deadlock with reopen */
249 if (scredits <= 8) {
250 *num = SMB2_MAX_BUFFER_SIZE;
251 credits->value = 0;
252 credits->instance = 0;
253 break;
254 }
255
256 /* leave some credits for reopen and other ops */
257 scredits -= 8;
258 *num = min_t(unsigned int, size,
259 scredits * SMB2_MAX_BUFFER_SIZE);
260
261 credits->value =
262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
263 credits->instance = server->reconnect_instance;
264 server->credits -= credits->value;
265 server->in_flight++;
266 if (server->in_flight > server->max_in_flight)
267 server->max_in_flight = server->in_flight;
268 break;
269 }
270 }
271 scredits = server->credits;
272 in_flight = server->in_flight;
273 spin_unlock(&server->req_lock);
274
275 trace_smb3_wait_credits(server->CurrentMid,
276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
278 __func__, credits->value, scredits);
279
280 return rc;
281 }
282
283 static int
284 smb2_adjust_credits(struct TCP_Server_Info *server,
285 struct cifs_credits *credits,
286 const unsigned int payload_size)
287 {
288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
289 int scredits, in_flight;
290
291 if (!credits->value || credits->value == new_val)
292 return 0;
293
294 if (credits->value < new_val) {
295 trace_smb3_too_many_credits(server->CurrentMid,
296 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
298 credits->value, new_val);
299
300 return -EOPNOTSUPP;
301 }
302
303 spin_lock(&server->req_lock);
304
305 if (server->reconnect_instance != credits->instance) {
306 scredits = server->credits;
307 in_flight = server->in_flight;
308 spin_unlock(&server->req_lock);
309
310 trace_smb3_reconnect_detected(server->CurrentMid,
311 server->conn_id, server->hostname, scredits,
312 credits->value - new_val, in_flight);
313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
314 credits->value - new_val);
315 return -EAGAIN;
316 }
317
318 server->credits += credits->value - new_val;
319 scredits = server->credits;
320 in_flight = server->in_flight;
321 spin_unlock(&server->req_lock);
322 wake_up(&server->request_q);
323
324 trace_smb3_adj_credits(server->CurrentMid,
325 server->conn_id, server->hostname, scredits,
326 credits->value - new_val, in_flight);
327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
328 __func__, credits->value - new_val, scredits);
329
330 credits->value = new_val;
331
332 return 0;
333 }
334
335 static __u64
336 smb2_get_next_mid(struct TCP_Server_Info *server)
337 {
338 __u64 mid;
339 /* for SMB2 we need the current value */
340 spin_lock(&server->mid_lock);
341 mid = server->CurrentMid++;
342 spin_unlock(&server->mid_lock);
343 return mid;
344 }
345
346 static void
347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
348 {
349 spin_lock(&server->mid_lock);
350 if (server->CurrentMid >= val)
351 server->CurrentMid -= val;
352 spin_unlock(&server->mid_lock);
353 }
354
355 static struct mid_q_entry *
356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
357 {
358 struct mid_q_entry *mid;
359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
360 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
361
362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
364 return NULL;
365 }
366
367 spin_lock(&server->mid_lock);
368 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
369 if ((mid->mid == wire_mid) &&
370 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
371 (mid->command == shdr->Command)) {
372 kref_get(&mid->refcount);
373 if (dequeue) {
374 list_del_init(&mid->qhead);
375 mid->mid_flags |= MID_DELETED;
376 }
377 spin_unlock(&server->mid_lock);
378 return mid;
379 }
380 }
381 spin_unlock(&server->mid_lock);
382 return NULL;
383 }
384
385 static struct mid_q_entry *
386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
387 {
388 return __smb2_find_mid(server, buf, false);
389 }
390
391 static struct mid_q_entry *
392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
393 {
394 return __smb2_find_mid(server, buf, true);
395 }
396
397 static void
398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
399 {
400 #ifdef CONFIG_CIFS_DEBUG2
401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
402
403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
405 shdr->Id.SyncId.ProcessId);
406 if (!server->ops->check_message(buf, server->total_read, server)) {
407 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
408 server->ops->calc_smb_size(buf));
409 }
410 #endif
411 }
412
413 static bool
414 smb2_need_neg(struct TCP_Server_Info *server)
415 {
416 return server->max_read == 0;
417 }
418
419 static int
420 smb2_negotiate(const unsigned int xid,
421 struct cifs_ses *ses,
422 struct TCP_Server_Info *server)
423 {
424 int rc;
425
426 spin_lock(&server->mid_lock);
427 server->CurrentMid = 0;
428 spin_unlock(&server->mid_lock);
429 rc = SMB2_negotiate(xid, ses, server);
430 /* BB we probably don't need to retry with modern servers */
431 if (rc == -EAGAIN)
432 rc = -EHOSTDOWN;
433 return rc;
434 }
435
436 static unsigned int
437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
438 {
439 struct TCP_Server_Info *server = tcon->ses->server;
440 unsigned int wsize;
441
442 /* start with specified wsize, or default */
443 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
444 wsize = min_t(unsigned int, wsize, server->max_write);
445 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
446 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
447
448 return wsize;
449 }
450
451 static unsigned int
452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
453 {
454 struct TCP_Server_Info *server = tcon->ses->server;
455 unsigned int wsize;
456
457 /* start with specified wsize, or default */
458 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
459 wsize = min_t(unsigned int, wsize, server->max_write);
460 #ifdef CONFIG_CIFS_SMB_DIRECT
461 if (server->rdma) {
462 if (server->sign)
463 /*
464 * Account for SMB2 data transfer packet header and
465 * possible encryption header
466 */
467 wsize = min_t(unsigned int,
468 wsize,
469 server->smbd_conn->max_fragmented_send_size -
470 SMB2_READWRITE_PDU_HEADER_SIZE -
471 sizeof(struct smb2_transform_hdr));
472 else
473 wsize = min_t(unsigned int,
474 wsize, server->smbd_conn->max_readwrite_size);
475 }
476 #endif
477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
478 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
479
480 return wsize;
481 }
482
483 static unsigned int
484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
485 {
486 struct TCP_Server_Info *server = tcon->ses->server;
487 unsigned int rsize;
488
489 /* start with specified rsize, or default */
490 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
491 rsize = min_t(unsigned int, rsize, server->max_read);
492
493 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
494 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
495
496 return rsize;
497 }
498
499 static unsigned int
500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
501 {
502 struct TCP_Server_Info *server = tcon->ses->server;
503 unsigned int rsize;
504
505 /* start with specified rsize, or default */
506 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
507 rsize = min_t(unsigned int, rsize, server->max_read);
508 #ifdef CONFIG_CIFS_SMB_DIRECT
509 if (server->rdma) {
510 if (server->sign)
511 /*
512 * Account for SMB2 data transfer packet header and
513 * possible encryption header
514 */
515 rsize = min_t(unsigned int,
516 rsize,
517 server->smbd_conn->max_fragmented_recv_size -
518 SMB2_READWRITE_PDU_HEADER_SIZE -
519 sizeof(struct smb2_transform_hdr));
520 else
521 rsize = min_t(unsigned int,
522 rsize, server->smbd_conn->max_readwrite_size);
523 }
524 #endif
525
526 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
527 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
528
529 return rsize;
530 }
531
532 /*
533 * compare two interfaces a and b
534 * return 0 if everything matches.
535 * return 1 if a is rdma capable, or rss capable, or has higher link speed
536 * return -1 otherwise.
537 */
538 static int
539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
540 {
541 int cmp_ret = 0;
542
543 WARN_ON(!a || !b);
544 if (a->rdma_capable == b->rdma_capable) {
545 if (a->rss_capable == b->rss_capable) {
546 if (a->speed == b->speed) {
547 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
548 (struct sockaddr *) &b->sockaddr);
549 if (!cmp_ret)
550 return 0;
551 else if (cmp_ret > 0)
552 return 1;
553 else
554 return -1;
555 } else if (a->speed > b->speed)
556 return 1;
557 else
558 return -1;
559 } else if (a->rss_capable > b->rss_capable)
560 return 1;
561 else
562 return -1;
563 } else if (a->rdma_capable > b->rdma_capable)
564 return 1;
565 else
566 return -1;
567 }
568
569 static int
570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
571 size_t buf_len, struct cifs_ses *ses, bool in_mount)
572 {
573 struct network_interface_info_ioctl_rsp *p;
574 struct sockaddr_in *addr4;
575 struct sockaddr_in6 *addr6;
576 struct iface_info_ipv4 *p4;
577 struct iface_info_ipv6 *p6;
578 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
579 struct cifs_server_iface tmp_iface;
580 ssize_t bytes_left;
581 size_t next = 0;
582 int nb_iface = 0;
583 int rc = 0, ret = 0;
584
585 bytes_left = buf_len;
586 p = buf;
587
588 spin_lock(&ses->iface_lock);
589 /* do not query too frequently, this time with lock held */
590 if (ses->iface_last_update &&
591 time_before(jiffies, ses->iface_last_update +
592 (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
593 spin_unlock(&ses->iface_lock);
594 return 0;
595 }
596
597 /*
598 * Go through iface_list and mark them as inactive
599 */
600 list_for_each_entry_safe(iface, niface, &ses->iface_list,
601 iface_head)
602 iface->is_active = 0;
603
604 spin_unlock(&ses->iface_lock);
605
606 /*
607 * Samba server e.g. can return an empty interface list in some cases,
608 * which would only be a problem if we were requesting multichannel
609 */
610 if (bytes_left == 0) {
611 /* avoid spamming logs every 10 minutes, so log only in mount */
612 if ((ses->chan_max > 1) && in_mount)
613 cifs_dbg(VFS,
614 "multichannel not available\n"
615 "Empty network interface list returned by server %s\n",
616 ses->server->hostname);
617 rc = -EOPNOTSUPP;
618 ses->iface_last_update = jiffies;
619 goto out;
620 }
621
622 while (bytes_left >= sizeof(*p)) {
623 memset(&tmp_iface, 0, sizeof(tmp_iface));
624 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
625 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
626 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
627
628 switch (p->Family) {
629 /*
630 * The kernel and wire socket structures have the same
631 * layout and use network byte order but make the
632 * conversion explicit in case either one changes.
633 */
634 case INTERNETWORK:
635 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
636 p4 = (struct iface_info_ipv4 *)p->Buffer;
637 addr4->sin_family = AF_INET;
638 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
639
640 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
641 addr4->sin_port = cpu_to_be16(CIFS_PORT);
642
643 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
644 &addr4->sin_addr);
645 break;
646 case INTERNETWORKV6:
647 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
648 p6 = (struct iface_info_ipv6 *)p->Buffer;
649 addr6->sin6_family = AF_INET6;
650 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
651
652 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
653 addr6->sin6_flowinfo = 0;
654 addr6->sin6_scope_id = 0;
655 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
656
657 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
658 &addr6->sin6_addr);
659 break;
660 default:
661 cifs_dbg(VFS,
662 "%s: skipping unsupported socket family\n",
663 __func__);
664 goto next_iface;
665 }
666
667 /*
668 * The iface_list is assumed to be sorted by speed.
669 * Check if the new interface exists in that list.
670 * NEVER change iface. it could be in use.
671 * Add a new one instead
672 */
673 spin_lock(&ses->iface_lock);
674 list_for_each_entry_safe(iface, niface, &ses->iface_list,
675 iface_head) {
676 ret = iface_cmp(iface, &tmp_iface);
677 if (!ret) {
678 iface->is_active = 1;
679 spin_unlock(&ses->iface_lock);
680 goto next_iface;
681 } else if (ret < 0) {
682 /* all remaining ifaces are slower */
683 kref_get(&iface->refcount);
684 break;
685 }
686 }
687 spin_unlock(&ses->iface_lock);
688
689 /* no match. insert the entry in the list */
690 info = kmalloc(sizeof(struct cifs_server_iface),
691 GFP_KERNEL);
692 if (!info) {
693 rc = -ENOMEM;
694 goto out;
695 }
696 memcpy(info, &tmp_iface, sizeof(tmp_iface));
697
698 /* add this new entry to the list */
699 kref_init(&info->refcount);
700 info->is_active = 1;
701
702 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
703 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
704 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
705 le32_to_cpu(p->Capability));
706
707 spin_lock(&ses->iface_lock);
708 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
709 list_add_tail(&info->iface_head, &iface->iface_head);
710 kref_put(&iface->refcount, release_iface);
711 } else
712 list_add_tail(&info->iface_head, &ses->iface_list);
713
714 ses->iface_count++;
715 spin_unlock(&ses->iface_lock);
716 next_iface:
717 nb_iface++;
718 next = le32_to_cpu(p->Next);
719 if (!next) {
720 bytes_left -= sizeof(*p);
721 break;
722 }
723 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
724 bytes_left -= next;
725 }
726
727 if (!nb_iface) {
728 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
729 rc = -EINVAL;
730 goto out;
731 }
732
733 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
734 if ((bytes_left > 8) || p->Next)
735 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
736
737 ses->iface_last_update = jiffies;
738
739 out:
740 /*
741 * Go through the list again and put the inactive entries
742 */
743 spin_lock(&ses->iface_lock);
744 list_for_each_entry_safe(iface, niface, &ses->iface_list,
745 iface_head) {
746 if (!iface->is_active) {
747 list_del(&iface->iface_head);
748 kref_put(&iface->refcount, release_iface);
749 ses->iface_count--;
750 }
751 }
752 spin_unlock(&ses->iface_lock);
753
754 return rc;
755 }
756
757 int
758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
759 {
760 int rc;
761 unsigned int ret_data_len = 0;
762 struct network_interface_info_ioctl_rsp *out_buf = NULL;
763 struct cifs_ses *ses = tcon->ses;
764 struct TCP_Server_Info *pserver;
765
766 /* do not query too frequently */
767 if (ses->iface_last_update &&
768 time_before(jiffies, ses->iface_last_update +
769 (SMB_INTERFACE_POLL_INTERVAL * HZ)))
770 return 0;
771
772 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
773 FSCTL_QUERY_NETWORK_INTERFACE_INFO,
774 NULL /* no data input */, 0 /* no data input */,
775 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
776 if (rc == -EOPNOTSUPP) {
777 cifs_dbg(FYI,
778 "server does not support query network interfaces\n");
779 ret_data_len = 0;
780 } else if (rc != 0) {
781 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
782 goto out;
783 }
784
785 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
786 if (rc)
787 goto out;
788
789 /* check if iface is still active */
790 spin_lock(&ses->chan_lock);
791 pserver = ses->chans[0].server;
792 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
793 spin_unlock(&ses->chan_lock);
794 cifs_chan_update_iface(ses, pserver);
795 spin_lock(&ses->chan_lock);
796 }
797 spin_unlock(&ses->chan_lock);
798
799 out:
800 kfree(out_buf);
801 return rc;
802 }
803
804 static void
805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
806 struct cifs_sb_info *cifs_sb)
807 {
808 int rc;
809 __le16 srch_path = 0; /* Null - open root of share */
810 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
811 struct cifs_open_parms oparms;
812 struct cifs_fid fid;
813 struct cached_fid *cfid = NULL;
814
815 oparms = (struct cifs_open_parms) {
816 .tcon = tcon,
817 .path = "",
818 .desired_access = FILE_READ_ATTRIBUTES,
819 .disposition = FILE_OPEN,
820 .create_options = cifs_create_options(cifs_sb, 0),
821 .fid = &fid,
822 };
823
824 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
825 if (rc == 0)
826 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
827 else
828 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
829 NULL, NULL);
830 if (rc)
831 return;
832
833 SMB3_request_interfaces(xid, tcon, true /* called during mount */);
834
835 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
836 FS_ATTRIBUTE_INFORMATION);
837 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
838 FS_DEVICE_INFORMATION);
839 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
840 FS_VOLUME_INFORMATION);
841 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
842 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
843 if (cfid == NULL)
844 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
845 else
846 close_cached_dir(cfid);
847 }
848
849 static void
850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
851 struct cifs_sb_info *cifs_sb)
852 {
853 int rc;
854 __le16 srch_path = 0; /* Null - open root of share */
855 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
856 struct cifs_open_parms oparms;
857 struct cifs_fid fid;
858
859 oparms = (struct cifs_open_parms) {
860 .tcon = tcon,
861 .path = "",
862 .desired_access = FILE_READ_ATTRIBUTES,
863 .disposition = FILE_OPEN,
864 .create_options = cifs_create_options(cifs_sb, 0),
865 .fid = &fid,
866 };
867
868 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
869 NULL, NULL);
870 if (rc)
871 return;
872
873 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
874 FS_ATTRIBUTE_INFORMATION);
875 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
876 FS_DEVICE_INFORMATION);
877 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
878 }
879
880 static int
881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
882 struct cifs_sb_info *cifs_sb, const char *full_path)
883 {
884 __le16 *utf16_path;
885 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
886 int err_buftype = CIFS_NO_BUFFER;
887 struct cifs_open_parms oparms;
888 struct kvec err_iov = {};
889 struct cifs_fid fid;
890 struct cached_fid *cfid;
891 bool islink;
892 int rc, rc2;
893
894 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
895 if (!rc) {
896 if (cfid->has_lease) {
897 close_cached_dir(cfid);
898 return 0;
899 }
900 close_cached_dir(cfid);
901 }
902
903 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
904 if (!utf16_path)
905 return -ENOMEM;
906
907 oparms = (struct cifs_open_parms) {
908 .tcon = tcon,
909 .path = full_path,
910 .desired_access = FILE_READ_ATTRIBUTES,
911 .disposition = FILE_OPEN,
912 .create_options = cifs_create_options(cifs_sb, 0),
913 .fid = &fid,
914 };
915
916 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
917 &err_iov, &err_buftype);
918 if (rc) {
919 struct smb2_hdr *hdr = err_iov.iov_base;
920
921 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
922 goto out;
923
924 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
925 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
926 full_path, &islink);
927 if (rc2) {
928 rc = rc2;
929 goto out;
930 }
931 if (islink)
932 rc = -EREMOTE;
933 }
934 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
935 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
936 rc = -EOPNOTSUPP;
937 goto out;
938 }
939
940 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
941
942 out:
943 free_rsp_buf(err_buftype, err_iov.iov_base);
944 kfree(utf16_path);
945 return rc;
946 }
947
948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
949 struct cifs_sb_info *cifs_sb, const char *full_path,
950 u64 *uniqueid, struct cifs_open_info_data *data)
951 {
952 *uniqueid = le64_to_cpu(data->fi.IndexNumber);
953 return 0;
954 }
955
956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
957 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
958 {
959 struct cifs_fid *fid = &cfile->fid;
960
961 if (cfile->symlink_target) {
962 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
963 if (!data->symlink_target)
964 return -ENOMEM;
965 }
966 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
967 }
968
969 #ifdef CONFIG_CIFS_XATTR
970 static ssize_t
971 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
972 struct smb2_file_full_ea_info *src, size_t src_size,
973 const unsigned char *ea_name)
974 {
975 int rc = 0;
976 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
977 char *name, *value;
978 size_t buf_size = dst_size;
979 size_t name_len, value_len, user_name_len;
980
981 while (src_size > 0) {
982 name_len = (size_t)src->ea_name_length;
983 value_len = (size_t)le16_to_cpu(src->ea_value_length);
984
985 if (name_len == 0)
986 break;
987
988 if (src_size < 8 + name_len + 1 + value_len) {
989 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
990 rc = -EIO;
991 goto out;
992 }
993
994 name = &src->ea_data[0];
995 value = &src->ea_data[src->ea_name_length + 1];
996
997 if (ea_name) {
998 if (ea_name_len == name_len &&
999 memcmp(ea_name, name, name_len) == 0) {
1000 rc = value_len;
1001 if (dst_size == 0)
1002 goto out;
1003 if (dst_size < value_len) {
1004 rc = -ERANGE;
1005 goto out;
1006 }
1007 memcpy(dst, value, value_len);
1008 goto out;
1009 }
1010 } else {
1011 /* 'user.' plus a terminating null */
1012 user_name_len = 5 + 1 + name_len;
1013
1014 if (buf_size == 0) {
1015 /* skip copy - calc size only */
1016 rc += user_name_len;
1017 } else if (dst_size >= user_name_len) {
1018 dst_size -= user_name_len;
1019 memcpy(dst, "user.", 5);
1020 dst += 5;
1021 memcpy(dst, src->ea_data, name_len);
1022 dst += name_len;
1023 *dst = 0;
1024 ++dst;
1025 rc += user_name_len;
1026 } else {
1027 /* stop before overrun buffer */
1028 rc = -ERANGE;
1029 break;
1030 }
1031 }
1032
1033 if (!src->next_entry_offset)
1034 break;
1035
1036 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1037 /* stop before overrun buffer */
1038 rc = -ERANGE;
1039 break;
1040 }
1041 src_size -= le32_to_cpu(src->next_entry_offset);
1042 src = (void *)((char *)src +
1043 le32_to_cpu(src->next_entry_offset));
1044 }
1045
1046 /* didn't find the named attribute */
1047 if (ea_name)
1048 rc = -ENODATA;
1049
1050 out:
1051 return (ssize_t)rc;
1052 }
1053
1054 static ssize_t
1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1056 const unsigned char *path, const unsigned char *ea_name,
1057 char *ea_data, size_t buf_size,
1058 struct cifs_sb_info *cifs_sb)
1059 {
1060 int rc;
1061 struct kvec rsp_iov = {NULL, 0};
1062 int buftype = CIFS_NO_BUFFER;
1063 struct smb2_query_info_rsp *rsp;
1064 struct smb2_file_full_ea_info *info = NULL;
1065
1066 rc = smb2_query_info_compound(xid, tcon, path,
1067 FILE_READ_EA,
1068 FILE_FULL_EA_INFORMATION,
1069 SMB2_O_INFO_FILE,
1070 CIFSMaxBufSize -
1071 MAX_SMB2_CREATE_RESPONSE_SIZE -
1072 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1073 &rsp_iov, &buftype, cifs_sb);
1074 if (rc) {
1075 /*
1076 * If ea_name is NULL (listxattr) and there are no EAs,
1077 * return 0 as it's not an error. Otherwise, the specified
1078 * ea_name was not found.
1079 */
1080 if (!ea_name && rc == -ENODATA)
1081 rc = 0;
1082 goto qeas_exit;
1083 }
1084
1085 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1086 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1087 le32_to_cpu(rsp->OutputBufferLength),
1088 &rsp_iov,
1089 sizeof(struct smb2_file_full_ea_info));
1090 if (rc)
1091 goto qeas_exit;
1092
1093 info = (struct smb2_file_full_ea_info *)(
1094 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1095 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1096 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1097
1098 qeas_exit:
1099 free_rsp_buf(buftype, rsp_iov.iov_base);
1100 return rc;
1101 }
1102
1103 static int
1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1105 const char *path, const char *ea_name, const void *ea_value,
1106 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1107 struct cifs_sb_info *cifs_sb)
1108 {
1109 struct smb2_compound_vars *vars;
1110 struct cifs_ses *ses = tcon->ses;
1111 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1112 struct smb_rqst *rqst;
1113 struct kvec *rsp_iov;
1114 __le16 *utf16_path = NULL;
1115 int ea_name_len = strlen(ea_name);
1116 int flags = CIFS_CP_CREATE_CLOSE_OP;
1117 int len;
1118 int resp_buftype[3];
1119 struct cifs_open_parms oparms;
1120 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1121 struct cifs_fid fid;
1122 unsigned int size[1];
1123 void *data[1];
1124 struct smb2_file_full_ea_info *ea = NULL;
1125 struct smb2_query_info_rsp *rsp;
1126 int rc, used_len = 0;
1127
1128 if (smb3_encryption_required(tcon))
1129 flags |= CIFS_TRANSFORM_REQ;
1130
1131 if (ea_name_len > 255)
1132 return -EINVAL;
1133
1134 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1135 if (!utf16_path)
1136 return -ENOMEM;
1137
1138 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1139 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1140 if (!vars) {
1141 rc = -ENOMEM;
1142 goto out_free_path;
1143 }
1144 rqst = vars->rqst;
1145 rsp_iov = vars->rsp_iov;
1146
1147 if (ses->server->ops->query_all_EAs) {
1148 if (!ea_value) {
1149 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1150 ea_name, NULL, 0,
1151 cifs_sb);
1152 if (rc == -ENODATA)
1153 goto sea_exit;
1154 } else {
1155 /* If we are adding a attribute we should first check
1156 * if there will be enough space available to store
1157 * the new EA. If not we should not add it since we
1158 * would not be able to even read the EAs back.
1159 */
1160 rc = smb2_query_info_compound(xid, tcon, path,
1161 FILE_READ_EA,
1162 FILE_FULL_EA_INFORMATION,
1163 SMB2_O_INFO_FILE,
1164 CIFSMaxBufSize -
1165 MAX_SMB2_CREATE_RESPONSE_SIZE -
1166 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1167 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1168 if (rc == 0) {
1169 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1170 used_len = le32_to_cpu(rsp->OutputBufferLength);
1171 }
1172 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1173 resp_buftype[1] = CIFS_NO_BUFFER;
1174 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1175 rc = 0;
1176
1177 /* Use a fudge factor of 256 bytes in case we collide
1178 * with a different set_EAs command.
1179 */
1180 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1181 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1182 used_len + ea_name_len + ea_value_len + 1) {
1183 rc = -ENOSPC;
1184 goto sea_exit;
1185 }
1186 }
1187 }
1188
1189 /* Open */
1190 rqst[0].rq_iov = vars->open_iov;
1191 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1192
1193 oparms = (struct cifs_open_parms) {
1194 .tcon = tcon,
1195 .path = path,
1196 .desired_access = FILE_WRITE_EA,
1197 .disposition = FILE_OPEN,
1198 .create_options = cifs_create_options(cifs_sb, 0),
1199 .fid = &fid,
1200 };
1201
1202 rc = SMB2_open_init(tcon, server,
1203 &rqst[0], &oplock, &oparms, utf16_path);
1204 if (rc)
1205 goto sea_exit;
1206 smb2_set_next_command(tcon, &rqst[0]);
1207
1208
1209 /* Set Info */
1210 rqst[1].rq_iov = vars->si_iov;
1211 rqst[1].rq_nvec = 1;
1212
1213 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1214 ea = kzalloc(len, GFP_KERNEL);
1215 if (ea == NULL) {
1216 rc = -ENOMEM;
1217 goto sea_exit;
1218 }
1219
1220 ea->ea_name_length = ea_name_len;
1221 ea->ea_value_length = cpu_to_le16(ea_value_len);
1222 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1223 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1224
1225 size[0] = len;
1226 data[0] = ea;
1227
1228 rc = SMB2_set_info_init(tcon, server,
1229 &rqst[1], COMPOUND_FID,
1230 COMPOUND_FID, current->tgid,
1231 FILE_FULL_EA_INFORMATION,
1232 SMB2_O_INFO_FILE, 0, data, size);
1233 if (rc)
1234 goto sea_exit;
1235 smb2_set_next_command(tcon, &rqst[1]);
1236 smb2_set_related(&rqst[1]);
1237
1238 /* Close */
1239 rqst[2].rq_iov = &vars->close_iov;
1240 rqst[2].rq_nvec = 1;
1241 rc = SMB2_close_init(tcon, server,
1242 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1243 if (rc)
1244 goto sea_exit;
1245 smb2_set_related(&rqst[2]);
1246
1247 rc = compound_send_recv(xid, ses, server,
1248 flags, 3, rqst,
1249 resp_buftype, rsp_iov);
1250 /* no need to bump num_remote_opens because handle immediately closed */
1251
1252 sea_exit:
1253 kfree(ea);
1254 SMB2_open_free(&rqst[0]);
1255 SMB2_set_info_free(&rqst[1]);
1256 SMB2_close_free(&rqst[2]);
1257 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1258 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1259 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1260 kfree(vars);
1261 out_free_path:
1262 kfree(utf16_path);
1263 return rc;
1264 }
1265 #endif
1266
1267 static bool
1268 smb2_can_echo(struct TCP_Server_Info *server)
1269 {
1270 return server->echoes;
1271 }
1272
1273 static void
1274 smb2_clear_stats(struct cifs_tcon *tcon)
1275 {
1276 int i;
1277
1278 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1279 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1280 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1281 }
1282 }
1283
1284 static void
1285 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1286 {
1287 seq_puts(m, "\n\tShare Capabilities:");
1288 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1289 seq_puts(m, " DFS,");
1290 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1291 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1292 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1293 seq_puts(m, " SCALEOUT,");
1294 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1295 seq_puts(m, " CLUSTER,");
1296 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1297 seq_puts(m, " ASYMMETRIC,");
1298 if (tcon->capabilities == 0)
1299 seq_puts(m, " None");
1300 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1301 seq_puts(m, " Aligned,");
1302 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1303 seq_puts(m, " Partition Aligned,");
1304 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1305 seq_puts(m, " SSD,");
1306 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1307 seq_puts(m, " TRIM-support,");
1308
1309 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1310 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1311 if (tcon->perf_sector_size)
1312 seq_printf(m, "\tOptimal sector size: 0x%x",
1313 tcon->perf_sector_size);
1314 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1315 }
1316
1317 static void
1318 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1319 {
1320 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1321 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1322
1323 /*
1324 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1325 * totals (requests sent) since those SMBs are per-session not per tcon
1326 */
1327 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1328 (long long)(tcon->bytes_read),
1329 (long long)(tcon->bytes_written));
1330 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1331 atomic_read(&tcon->num_local_opens),
1332 atomic_read(&tcon->num_remote_opens));
1333 seq_printf(m, "\nTreeConnects: %d total %d failed",
1334 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1335 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1336 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1337 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1338 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1339 seq_printf(m, "\nCreates: %d total %d failed",
1340 atomic_read(&sent[SMB2_CREATE_HE]),
1341 atomic_read(&failed[SMB2_CREATE_HE]));
1342 seq_printf(m, "\nCloses: %d total %d failed",
1343 atomic_read(&sent[SMB2_CLOSE_HE]),
1344 atomic_read(&failed[SMB2_CLOSE_HE]));
1345 seq_printf(m, "\nFlushes: %d total %d failed",
1346 atomic_read(&sent[SMB2_FLUSH_HE]),
1347 atomic_read(&failed[SMB2_FLUSH_HE]));
1348 seq_printf(m, "\nReads: %d total %d failed",
1349 atomic_read(&sent[SMB2_READ_HE]),
1350 atomic_read(&failed[SMB2_READ_HE]));
1351 seq_printf(m, "\nWrites: %d total %d failed",
1352 atomic_read(&sent[SMB2_WRITE_HE]),
1353 atomic_read(&failed[SMB2_WRITE_HE]));
1354 seq_printf(m, "\nLocks: %d total %d failed",
1355 atomic_read(&sent[SMB2_LOCK_HE]),
1356 atomic_read(&failed[SMB2_LOCK_HE]));
1357 seq_printf(m, "\nIOCTLs: %d total %d failed",
1358 atomic_read(&sent[SMB2_IOCTL_HE]),
1359 atomic_read(&failed[SMB2_IOCTL_HE]));
1360 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1361 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1362 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1363 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1364 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1365 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1366 seq_printf(m, "\nQueryInfos: %d total %d failed",
1367 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1368 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1369 seq_printf(m, "\nSetInfos: %d total %d failed",
1370 atomic_read(&sent[SMB2_SET_INFO_HE]),
1371 atomic_read(&failed[SMB2_SET_INFO_HE]));
1372 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1373 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1374 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1375 }
1376
1377 static void
1378 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1379 {
1380 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1381 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1382
1383 cfile->fid.persistent_fid = fid->persistent_fid;
1384 cfile->fid.volatile_fid = fid->volatile_fid;
1385 cfile->fid.access = fid->access;
1386 #ifdef CONFIG_CIFS_DEBUG2
1387 cfile->fid.mid = fid->mid;
1388 #endif /* CIFS_DEBUG2 */
1389 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1390 &fid->purge_cache);
1391 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1392 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1393 }
1394
1395 static void
1396 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1397 struct cifs_fid *fid)
1398 {
1399 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1400 }
1401
1402 static void
1403 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1404 struct cifsFileInfo *cfile)
1405 {
1406 struct smb2_file_network_open_info file_inf;
1407 struct inode *inode;
1408 int rc;
1409
1410 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1411 cfile->fid.volatile_fid, &file_inf);
1412 if (rc)
1413 return;
1414
1415 inode = d_inode(cfile->dentry);
1416
1417 spin_lock(&inode->i_lock);
1418 CIFS_I(inode)->time = jiffies;
1419
1420 /* Creation time should not need to be updated on close */
1421 if (file_inf.LastWriteTime)
1422 inode_set_mtime_to_ts(inode,
1423 cifs_NTtimeToUnix(file_inf.LastWriteTime));
1424 if (file_inf.ChangeTime)
1425 inode_set_ctime_to_ts(inode,
1426 cifs_NTtimeToUnix(file_inf.ChangeTime));
1427 if (file_inf.LastAccessTime)
1428 inode_set_atime_to_ts(inode,
1429 cifs_NTtimeToUnix(file_inf.LastAccessTime));
1430
1431 /*
1432 * i_blocks is not related to (i_size / i_blksize),
1433 * but instead 512 byte (2**9) size is required for
1434 * calculating num blocks.
1435 */
1436 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1437 inode->i_blocks =
1438 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1439
1440 /* End of file and Attributes should not have to be updated on close */
1441 spin_unlock(&inode->i_lock);
1442 }
1443
1444 static int
1445 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1446 u64 persistent_fid, u64 volatile_fid,
1447 struct copychunk_ioctl *pcchunk)
1448 {
1449 int rc;
1450 unsigned int ret_data_len;
1451 struct resume_key_req *res_key;
1452
1453 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1454 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1455 CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1456
1457 if (rc == -EOPNOTSUPP) {
1458 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1459 goto req_res_key_exit;
1460 } else if (rc) {
1461 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1462 goto req_res_key_exit;
1463 }
1464 if (ret_data_len < sizeof(struct resume_key_req)) {
1465 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1466 rc = -EINVAL;
1467 goto req_res_key_exit;
1468 }
1469 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1470
1471 req_res_key_exit:
1472 kfree(res_key);
1473 return rc;
1474 }
1475
1476 static int
1477 smb2_ioctl_query_info(const unsigned int xid,
1478 struct cifs_tcon *tcon,
1479 struct cifs_sb_info *cifs_sb,
1480 __le16 *path, int is_dir,
1481 unsigned long p)
1482 {
1483 struct smb2_compound_vars *vars;
1484 struct smb_rqst *rqst;
1485 struct kvec *rsp_iov;
1486 struct cifs_ses *ses = tcon->ses;
1487 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1488 char __user *arg = (char __user *)p;
1489 struct smb_query_info qi;
1490 struct smb_query_info __user *pqi;
1491 int rc = 0;
1492 int flags = CIFS_CP_CREATE_CLOSE_OP;
1493 struct smb2_query_info_rsp *qi_rsp = NULL;
1494 struct smb2_ioctl_rsp *io_rsp = NULL;
1495 void *buffer = NULL;
1496 int resp_buftype[3];
1497 struct cifs_open_parms oparms;
1498 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1499 struct cifs_fid fid;
1500 unsigned int size[2];
1501 void *data[2];
1502 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1503 void (*free_req1_func)(struct smb_rqst *r);
1504
1505 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1506 if (vars == NULL)
1507 return -ENOMEM;
1508 rqst = &vars->rqst[0];
1509 rsp_iov = &vars->rsp_iov[0];
1510
1511 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1512
1513 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1514 rc = -EFAULT;
1515 goto free_vars;
1516 }
1517 if (qi.output_buffer_length > 1024) {
1518 rc = -EINVAL;
1519 goto free_vars;
1520 }
1521
1522 if (!ses || !server) {
1523 rc = -EIO;
1524 goto free_vars;
1525 }
1526
1527 if (smb3_encryption_required(tcon))
1528 flags |= CIFS_TRANSFORM_REQ;
1529
1530 if (qi.output_buffer_length) {
1531 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1532 if (IS_ERR(buffer)) {
1533 rc = PTR_ERR(buffer);
1534 goto free_vars;
1535 }
1536 }
1537
1538 /* Open */
1539 rqst[0].rq_iov = &vars->open_iov[0];
1540 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1541
1542 oparms = (struct cifs_open_parms) {
1543 .tcon = tcon,
1544 .disposition = FILE_OPEN,
1545 .create_options = cifs_create_options(cifs_sb, create_options),
1546 .fid = &fid,
1547 };
1548
1549 if (qi.flags & PASSTHRU_FSCTL) {
1550 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1551 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1552 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1553 break;
1554 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1555 oparms.desired_access = GENERIC_ALL;
1556 break;
1557 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1558 oparms.desired_access = GENERIC_READ;
1559 break;
1560 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1561 oparms.desired_access = GENERIC_WRITE;
1562 break;
1563 }
1564 } else if (qi.flags & PASSTHRU_SET_INFO) {
1565 oparms.desired_access = GENERIC_WRITE;
1566 } else {
1567 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1568 }
1569
1570 rc = SMB2_open_init(tcon, server,
1571 &rqst[0], &oplock, &oparms, path);
1572 if (rc)
1573 goto free_output_buffer;
1574 smb2_set_next_command(tcon, &rqst[0]);
1575
1576 /* Query */
1577 if (qi.flags & PASSTHRU_FSCTL) {
1578 /* Can eventually relax perm check since server enforces too */
1579 if (!capable(CAP_SYS_ADMIN)) {
1580 rc = -EPERM;
1581 goto free_open_req;
1582 }
1583 rqst[1].rq_iov = &vars->io_iov[0];
1584 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1585
1586 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1587 qi.info_type, buffer, qi.output_buffer_length,
1588 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1589 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1590 free_req1_func = SMB2_ioctl_free;
1591 } else if (qi.flags == PASSTHRU_SET_INFO) {
1592 /* Can eventually relax perm check since server enforces too */
1593 if (!capable(CAP_SYS_ADMIN)) {
1594 rc = -EPERM;
1595 goto free_open_req;
1596 }
1597 if (qi.output_buffer_length < 8) {
1598 rc = -EINVAL;
1599 goto free_open_req;
1600 }
1601 rqst[1].rq_iov = vars->si_iov;
1602 rqst[1].rq_nvec = 1;
1603
1604 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1605 size[0] = 8;
1606 data[0] = buffer;
1607
1608 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1609 current->tgid, FILE_END_OF_FILE_INFORMATION,
1610 SMB2_O_INFO_FILE, 0, data, size);
1611 free_req1_func = SMB2_set_info_free;
1612 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1613 rqst[1].rq_iov = &vars->qi_iov;
1614 rqst[1].rq_nvec = 1;
1615
1616 rc = SMB2_query_info_init(tcon, server,
1617 &rqst[1], COMPOUND_FID,
1618 COMPOUND_FID, qi.file_info_class,
1619 qi.info_type, qi.additional_information,
1620 qi.input_buffer_length,
1621 qi.output_buffer_length, buffer);
1622 free_req1_func = SMB2_query_info_free;
1623 } else { /* unknown flags */
1624 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1625 qi.flags);
1626 rc = -EINVAL;
1627 }
1628
1629 if (rc)
1630 goto free_open_req;
1631 smb2_set_next_command(tcon, &rqst[1]);
1632 smb2_set_related(&rqst[1]);
1633
1634 /* Close */
1635 rqst[2].rq_iov = &vars->close_iov;
1636 rqst[2].rq_nvec = 1;
1637
1638 rc = SMB2_close_init(tcon, server,
1639 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1640 if (rc)
1641 goto free_req_1;
1642 smb2_set_related(&rqst[2]);
1643
1644 rc = compound_send_recv(xid, ses, server,
1645 flags, 3, rqst,
1646 resp_buftype, rsp_iov);
1647 if (rc)
1648 goto out;
1649
1650 /* No need to bump num_remote_opens since handle immediately closed */
1651 if (qi.flags & PASSTHRU_FSCTL) {
1652 pqi = (struct smb_query_info __user *)arg;
1653 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1654 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1655 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1656 if (qi.input_buffer_length > 0 &&
1657 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1658 > rsp_iov[1].iov_len) {
1659 rc = -EFAULT;
1660 goto out;
1661 }
1662
1663 if (copy_to_user(&pqi->input_buffer_length,
1664 &qi.input_buffer_length,
1665 sizeof(qi.input_buffer_length))) {
1666 rc = -EFAULT;
1667 goto out;
1668 }
1669
1670 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1671 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1672 qi.input_buffer_length))
1673 rc = -EFAULT;
1674 } else {
1675 pqi = (struct smb_query_info __user *)arg;
1676 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1677 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1678 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1679 if (copy_to_user(&pqi->input_buffer_length,
1680 &qi.input_buffer_length,
1681 sizeof(qi.input_buffer_length))) {
1682 rc = -EFAULT;
1683 goto out;
1684 }
1685
1686 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1687 qi.input_buffer_length))
1688 rc = -EFAULT;
1689 }
1690
1691 out:
1692 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1693 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1694 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1695 SMB2_close_free(&rqst[2]);
1696 free_req_1:
1697 free_req1_func(&rqst[1]);
1698 free_open_req:
1699 SMB2_open_free(&rqst[0]);
1700 free_output_buffer:
1701 kfree(buffer);
1702 free_vars:
1703 kfree(vars);
1704 return rc;
1705 }
1706
1707 static ssize_t
1708 smb2_copychunk_range(const unsigned int xid,
1709 struct cifsFileInfo *srcfile,
1710 struct cifsFileInfo *trgtfile, u64 src_off,
1711 u64 len, u64 dest_off)
1712 {
1713 int rc;
1714 unsigned int ret_data_len;
1715 struct copychunk_ioctl *pcchunk;
1716 struct copychunk_ioctl_rsp *retbuf = NULL;
1717 struct cifs_tcon *tcon;
1718 int chunks_copied = 0;
1719 bool chunk_sizes_updated = false;
1720 ssize_t bytes_written, total_bytes_written = 0;
1721
1722 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1723 if (pcchunk == NULL)
1724 return -ENOMEM;
1725
1726 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1727 /* Request a key from the server to identify the source of the copy */
1728 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1729 srcfile->fid.persistent_fid,
1730 srcfile->fid.volatile_fid, pcchunk);
1731
1732 /* Note: request_res_key sets res_key null only if rc !=0 */
1733 if (rc)
1734 goto cchunk_out;
1735
1736 /* For now array only one chunk long, will make more flexible later */
1737 pcchunk->ChunkCount = cpu_to_le32(1);
1738 pcchunk->Reserved = 0;
1739 pcchunk->Reserved2 = 0;
1740
1741 tcon = tlink_tcon(trgtfile->tlink);
1742
1743 while (len > 0) {
1744 pcchunk->SourceOffset = cpu_to_le64(src_off);
1745 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1746 pcchunk->Length =
1747 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1748
1749 /* Request server copy to target from src identified by key */
1750 kfree(retbuf);
1751 retbuf = NULL;
1752 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1753 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1754 (char *)pcchunk, sizeof(struct copychunk_ioctl),
1755 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1756 if (rc == 0) {
1757 if (ret_data_len !=
1758 sizeof(struct copychunk_ioctl_rsp)) {
1759 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1760 rc = -EIO;
1761 goto cchunk_out;
1762 }
1763 if (retbuf->TotalBytesWritten == 0) {
1764 cifs_dbg(FYI, "no bytes copied\n");
1765 rc = -EIO;
1766 goto cchunk_out;
1767 }
1768 /*
1769 * Check if server claimed to write more than we asked
1770 */
1771 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1772 le32_to_cpu(pcchunk->Length)) {
1773 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1774 rc = -EIO;
1775 goto cchunk_out;
1776 }
1777 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1778 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1779 rc = -EIO;
1780 goto cchunk_out;
1781 }
1782 chunks_copied++;
1783
1784 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1785 src_off += bytes_written;
1786 dest_off += bytes_written;
1787 len -= bytes_written;
1788 total_bytes_written += bytes_written;
1789
1790 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1791 le32_to_cpu(retbuf->ChunksWritten),
1792 le32_to_cpu(retbuf->ChunkBytesWritten),
1793 bytes_written);
1794 } else if (rc == -EINVAL) {
1795 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1796 goto cchunk_out;
1797
1798 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1799 le32_to_cpu(retbuf->ChunksWritten),
1800 le32_to_cpu(retbuf->ChunkBytesWritten),
1801 le32_to_cpu(retbuf->TotalBytesWritten));
1802
1803 /*
1804 * Check if this is the first request using these sizes,
1805 * (ie check if copy succeed once with original sizes
1806 * and check if the server gave us different sizes after
1807 * we already updated max sizes on previous request).
1808 * if not then why is the server returning an error now
1809 */
1810 if ((chunks_copied != 0) || chunk_sizes_updated)
1811 goto cchunk_out;
1812
1813 /* Check that server is not asking us to grow size */
1814 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1815 tcon->max_bytes_chunk)
1816 tcon->max_bytes_chunk =
1817 le32_to_cpu(retbuf->ChunkBytesWritten);
1818 else
1819 goto cchunk_out; /* server gave us bogus size */
1820
1821 /* No need to change MaxChunks since already set to 1 */
1822 chunk_sizes_updated = true;
1823 } else
1824 goto cchunk_out;
1825 }
1826
1827 cchunk_out:
1828 kfree(pcchunk);
1829 kfree(retbuf);
1830 if (rc)
1831 return rc;
1832 else
1833 return total_bytes_written;
1834 }
1835
1836 static int
1837 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1838 struct cifs_fid *fid)
1839 {
1840 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1841 }
1842
1843 static unsigned int
1844 smb2_read_data_offset(char *buf)
1845 {
1846 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1847
1848 return rsp->DataOffset;
1849 }
1850
1851 static unsigned int
1852 smb2_read_data_length(char *buf, bool in_remaining)
1853 {
1854 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1855
1856 if (in_remaining)
1857 return le32_to_cpu(rsp->DataRemaining);
1858
1859 return le32_to_cpu(rsp->DataLength);
1860 }
1861
1862
1863 static int
1864 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1865 struct cifs_io_parms *parms, unsigned int *bytes_read,
1866 char **buf, int *buf_type)
1867 {
1868 parms->persistent_fid = pfid->persistent_fid;
1869 parms->volatile_fid = pfid->volatile_fid;
1870 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1871 }
1872
1873 static int
1874 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1875 struct cifs_io_parms *parms, unsigned int *written,
1876 struct kvec *iov, unsigned long nr_segs)
1877 {
1878
1879 parms->persistent_fid = pfid->persistent_fid;
1880 parms->volatile_fid = pfid->volatile_fid;
1881 return SMB2_write(xid, parms, written, iov, nr_segs);
1882 }
1883
1884 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1885 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1886 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1887 {
1888 struct cifsInodeInfo *cifsi;
1889 int rc;
1890
1891 cifsi = CIFS_I(inode);
1892
1893 /* if file already sparse don't bother setting sparse again */
1894 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1895 return true; /* already sparse */
1896
1897 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1898 return true; /* already not sparse */
1899
1900 /*
1901 * Can't check for sparse support on share the usual way via the
1902 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1903 * since Samba server doesn't set the flag on the share, yet
1904 * supports the set sparse FSCTL and returns sparse correctly
1905 * in the file attributes. If we fail setting sparse though we
1906 * mark that server does not support sparse files for this share
1907 * to avoid repeatedly sending the unsupported fsctl to server
1908 * if the file is repeatedly extended.
1909 */
1910 if (tcon->broken_sparse_sup)
1911 return false;
1912
1913 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1914 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1915 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1916 if (rc) {
1917 tcon->broken_sparse_sup = true;
1918 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1919 return false;
1920 }
1921
1922 if (setsparse)
1923 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1924 else
1925 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1926
1927 return true;
1928 }
1929
1930 static int
1931 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1932 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1933 {
1934 struct inode *inode;
1935
1936 /*
1937 * If extending file more than one page make sparse. Many Linux fs
1938 * make files sparse by default when extending via ftruncate
1939 */
1940 inode = d_inode(cfile->dentry);
1941
1942 if (!set_alloc && (size > inode->i_size + 8192)) {
1943 __u8 set_sparse = 1;
1944
1945 /* whether set sparse succeeds or not, extend the file */
1946 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1947 }
1948
1949 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1950 cfile->fid.volatile_fid, cfile->pid, size);
1951 }
1952
1953 static int
1954 smb2_duplicate_extents(const unsigned int xid,
1955 struct cifsFileInfo *srcfile,
1956 struct cifsFileInfo *trgtfile, u64 src_off,
1957 u64 len, u64 dest_off)
1958 {
1959 int rc;
1960 unsigned int ret_data_len;
1961 struct inode *inode;
1962 struct duplicate_extents_to_file dup_ext_buf;
1963 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1964
1965 /* server fileays advertise duplicate extent support with this flag */
1966 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1967 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1968 return -EOPNOTSUPP;
1969
1970 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1971 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1972 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1973 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1974 dup_ext_buf.ByteCount = cpu_to_le64(len);
1975 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1976 src_off, dest_off, len);
1977
1978 inode = d_inode(trgtfile->dentry);
1979 if (inode->i_size < dest_off + len) {
1980 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1981 if (rc)
1982 goto duplicate_extents_out;
1983
1984 /*
1985 * Although also could set plausible allocation size (i_blocks)
1986 * here in addition to setting the file size, in reflink
1987 * it is likely that the target file is sparse. Its allocation
1988 * size will be queried on next revalidate, but it is important
1989 * to make sure that file's cached size is updated immediately
1990 */
1991 cifs_setsize(inode, dest_off + len);
1992 }
1993 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1994 trgtfile->fid.volatile_fid,
1995 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1996 (char *)&dup_ext_buf,
1997 sizeof(struct duplicate_extents_to_file),
1998 CIFSMaxBufSize, NULL,
1999 &ret_data_len);
2000
2001 if (ret_data_len > 0)
2002 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2003
2004 duplicate_extents_out:
2005 return rc;
2006 }
2007
2008 static int
2009 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2010 struct cifsFileInfo *cfile)
2011 {
2012 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2013 cfile->fid.volatile_fid);
2014 }
2015
2016 static int
2017 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2018 struct cifsFileInfo *cfile)
2019 {
2020 struct fsctl_set_integrity_information_req integr_info;
2021 unsigned int ret_data_len;
2022
2023 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2024 integr_info.Flags = 0;
2025 integr_info.Reserved = 0;
2026
2027 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2028 cfile->fid.volatile_fid,
2029 FSCTL_SET_INTEGRITY_INFORMATION,
2030 (char *)&integr_info,
2031 sizeof(struct fsctl_set_integrity_information_req),
2032 CIFSMaxBufSize, NULL,
2033 &ret_data_len);
2034
2035 }
2036
2037 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2038 #define GMT_TOKEN_SIZE 50
2039
2040 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2041
2042 /*
2043 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2044 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2045 */
2046 static int
2047 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2048 struct cifsFileInfo *cfile, void __user *ioc_buf)
2049 {
2050 char *retbuf = NULL;
2051 unsigned int ret_data_len = 0;
2052 int rc;
2053 u32 max_response_size;
2054 struct smb_snapshot_array snapshot_in;
2055
2056 /*
2057 * On the first query to enumerate the list of snapshots available
2058 * for this volume the buffer begins with 0 (number of snapshots
2059 * which can be returned is zero since at that point we do not know
2060 * how big the buffer needs to be). On the second query,
2061 * it (ret_data_len) is set to number of snapshots so we can
2062 * know to set the maximum response size larger (see below).
2063 */
2064 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2065 return -EFAULT;
2066
2067 /*
2068 * Note that for snapshot queries that servers like Azure expect that
2069 * the first query be minimal size (and just used to get the number/size
2070 * of previous versions) so response size must be specified as EXACTLY
2071 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2072 * of eight bytes.
2073 */
2074 if (ret_data_len == 0)
2075 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2076 else
2077 max_response_size = CIFSMaxBufSize;
2078
2079 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2080 cfile->fid.volatile_fid,
2081 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2082 NULL, 0 /* no input data */, max_response_size,
2083 (char **)&retbuf,
2084 &ret_data_len);
2085 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2086 rc, ret_data_len);
2087 if (rc)
2088 return rc;
2089
2090 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2091 /* Fixup buffer */
2092 if (copy_from_user(&snapshot_in, ioc_buf,
2093 sizeof(struct smb_snapshot_array))) {
2094 rc = -EFAULT;
2095 kfree(retbuf);
2096 return rc;
2097 }
2098
2099 /*
2100 * Check for min size, ie not large enough to fit even one GMT
2101 * token (snapshot). On the first ioctl some users may pass in
2102 * smaller size (or zero) to simply get the size of the array
2103 * so the user space caller can allocate sufficient memory
2104 * and retry the ioctl again with larger array size sufficient
2105 * to hold all of the snapshot GMT tokens on the second try.
2106 */
2107 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2108 ret_data_len = sizeof(struct smb_snapshot_array);
2109
2110 /*
2111 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2112 * the snapshot array (of 50 byte GMT tokens) each
2113 * representing an available previous version of the data
2114 */
2115 if (ret_data_len > (snapshot_in.snapshot_array_size +
2116 sizeof(struct smb_snapshot_array)))
2117 ret_data_len = snapshot_in.snapshot_array_size +
2118 sizeof(struct smb_snapshot_array);
2119
2120 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2121 rc = -EFAULT;
2122 }
2123
2124 kfree(retbuf);
2125 return rc;
2126 }
2127
2128
2129
2130 static int
2131 smb3_notify(const unsigned int xid, struct file *pfile,
2132 void __user *ioc_buf, bool return_changes)
2133 {
2134 struct smb3_notify_info notify;
2135 struct smb3_notify_info __user *pnotify_buf;
2136 struct dentry *dentry = pfile->f_path.dentry;
2137 struct inode *inode = file_inode(pfile);
2138 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2139 struct cifs_open_parms oparms;
2140 struct cifs_fid fid;
2141 struct cifs_tcon *tcon;
2142 const unsigned char *path;
2143 char *returned_ioctl_info = NULL;
2144 void *page = alloc_dentry_path();
2145 __le16 *utf16_path = NULL;
2146 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2147 int rc = 0;
2148 __u32 ret_len = 0;
2149
2150 path = build_path_from_dentry(dentry, page);
2151 if (IS_ERR(path)) {
2152 rc = PTR_ERR(path);
2153 goto notify_exit;
2154 }
2155
2156 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2157 if (utf16_path == NULL) {
2158 rc = -ENOMEM;
2159 goto notify_exit;
2160 }
2161
2162 if (return_changes) {
2163 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2164 rc = -EFAULT;
2165 goto notify_exit;
2166 }
2167 } else {
2168 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2169 rc = -EFAULT;
2170 goto notify_exit;
2171 }
2172 notify.data_len = 0;
2173 }
2174
2175 tcon = cifs_sb_master_tcon(cifs_sb);
2176 oparms = (struct cifs_open_parms) {
2177 .tcon = tcon,
2178 .path = path,
2179 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2180 .disposition = FILE_OPEN,
2181 .create_options = cifs_create_options(cifs_sb, 0),
2182 .fid = &fid,
2183 };
2184
2185 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2186 NULL);
2187 if (rc)
2188 goto notify_exit;
2189
2190 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2191 notify.watch_tree, notify.completion_filter,
2192 notify.data_len, &returned_ioctl_info, &ret_len);
2193
2194 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2195
2196 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2197 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2198 if (ret_len > notify.data_len)
2199 ret_len = notify.data_len;
2200 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2201 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2202 rc = -EFAULT;
2203 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2204 rc = -EFAULT;
2205 }
2206 kfree(returned_ioctl_info);
2207 notify_exit:
2208 free_dentry_path(page);
2209 kfree(utf16_path);
2210 return rc;
2211 }
2212
2213 static int
2214 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2215 const char *path, struct cifs_sb_info *cifs_sb,
2216 struct cifs_fid *fid, __u16 search_flags,
2217 struct cifs_search_info *srch_inf)
2218 {
2219 __le16 *utf16_path;
2220 struct smb_rqst rqst[2];
2221 struct kvec rsp_iov[2];
2222 int resp_buftype[2];
2223 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2224 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2225 int rc, flags = 0;
2226 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2227 struct cifs_open_parms oparms;
2228 struct smb2_query_directory_rsp *qd_rsp = NULL;
2229 struct smb2_create_rsp *op_rsp = NULL;
2230 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2231 int retry_count = 0;
2232
2233 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2234 if (!utf16_path)
2235 return -ENOMEM;
2236
2237 if (smb3_encryption_required(tcon))
2238 flags |= CIFS_TRANSFORM_REQ;
2239
2240 memset(rqst, 0, sizeof(rqst));
2241 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2242 memset(rsp_iov, 0, sizeof(rsp_iov));
2243
2244 /* Open */
2245 memset(&open_iov, 0, sizeof(open_iov));
2246 rqst[0].rq_iov = open_iov;
2247 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2248
2249 oparms = (struct cifs_open_parms) {
2250 .tcon = tcon,
2251 .path = path,
2252 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2253 .disposition = FILE_OPEN,
2254 .create_options = cifs_create_options(cifs_sb, 0),
2255 .fid = fid,
2256 };
2257
2258 rc = SMB2_open_init(tcon, server,
2259 &rqst[0], &oplock, &oparms, utf16_path);
2260 if (rc)
2261 goto qdf_free;
2262 smb2_set_next_command(tcon, &rqst[0]);
2263
2264 /* Query directory */
2265 srch_inf->entries_in_buffer = 0;
2266 srch_inf->index_of_last_entry = 2;
2267
2268 memset(&qd_iov, 0, sizeof(qd_iov));
2269 rqst[1].rq_iov = qd_iov;
2270 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2271
2272 rc = SMB2_query_directory_init(xid, tcon, server,
2273 &rqst[1],
2274 COMPOUND_FID, COMPOUND_FID,
2275 0, srch_inf->info_level);
2276 if (rc)
2277 goto qdf_free;
2278
2279 smb2_set_related(&rqst[1]);
2280
2281 again:
2282 rc = compound_send_recv(xid, tcon->ses, server,
2283 flags, 2, rqst,
2284 resp_buftype, rsp_iov);
2285
2286 if (rc == -EAGAIN && retry_count++ < 10)
2287 goto again;
2288
2289 /* If the open failed there is nothing to do */
2290 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2291 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2292 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2293 goto qdf_free;
2294 }
2295 fid->persistent_fid = op_rsp->PersistentFileId;
2296 fid->volatile_fid = op_rsp->VolatileFileId;
2297
2298 /* Anything else than ENODATA means a genuine error */
2299 if (rc && rc != -ENODATA) {
2300 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2301 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2302 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2303 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2304 goto qdf_free;
2305 }
2306
2307 atomic_inc(&tcon->num_remote_opens);
2308
2309 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2310 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2311 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2312 tcon->tid, tcon->ses->Suid, 0, 0);
2313 srch_inf->endOfSearch = true;
2314 rc = 0;
2315 goto qdf_free;
2316 }
2317
2318 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2319 srch_inf);
2320 if (rc) {
2321 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2322 tcon->ses->Suid, 0, 0, rc);
2323 goto qdf_free;
2324 }
2325 resp_buftype[1] = CIFS_NO_BUFFER;
2326
2327 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2328 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2329
2330 qdf_free:
2331 kfree(utf16_path);
2332 SMB2_open_free(&rqst[0]);
2333 SMB2_query_directory_free(&rqst[1]);
2334 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2335 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2336 return rc;
2337 }
2338
2339 static int
2340 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2341 struct cifs_fid *fid, __u16 search_flags,
2342 struct cifs_search_info *srch_inf)
2343 {
2344 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2345 fid->volatile_fid, 0, srch_inf);
2346 }
2347
2348 static int
2349 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2350 struct cifs_fid *fid)
2351 {
2352 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2353 }
2354
2355 /*
2356 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2357 * the number of credits and return true. Otherwise - return false.
2358 */
2359 static bool
2360 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2361 {
2362 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2363 int scredits, in_flight;
2364
2365 if (shdr->Status != STATUS_PENDING)
2366 return false;
2367
2368 if (shdr->CreditRequest) {
2369 spin_lock(&server->req_lock);
2370 server->credits += le16_to_cpu(shdr->CreditRequest);
2371 scredits = server->credits;
2372 in_flight = server->in_flight;
2373 spin_unlock(&server->req_lock);
2374 wake_up(&server->request_q);
2375
2376 trace_smb3_pend_credits(server->CurrentMid,
2377 server->conn_id, server->hostname, scredits,
2378 le16_to_cpu(shdr->CreditRequest), in_flight);
2379 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2380 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2381 }
2382
2383 return true;
2384 }
2385
2386 static bool
2387 smb2_is_session_expired(char *buf)
2388 {
2389 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2390
2391 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2392 shdr->Status != STATUS_USER_SESSION_DELETED)
2393 return false;
2394
2395 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2396 le64_to_cpu(shdr->SessionId),
2397 le16_to_cpu(shdr->Command),
2398 le64_to_cpu(shdr->MessageId));
2399 cifs_dbg(FYI, "Session expired or deleted\n");
2400
2401 return true;
2402 }
2403
2404 static bool
2405 smb2_is_status_io_timeout(char *buf)
2406 {
2407 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2408
2409 if (shdr->Status == STATUS_IO_TIMEOUT)
2410 return true;
2411 else
2412 return false;
2413 }
2414
2415 static bool
2416 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2417 {
2418 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2419 struct TCP_Server_Info *pserver;
2420 struct cifs_ses *ses;
2421 struct cifs_tcon *tcon;
2422
2423 if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2424 return false;
2425
2426 /* If server is a channel, select the primary channel */
2427 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2428
2429 spin_lock(&cifs_tcp_ses_lock);
2430 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2431 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2432 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2433 spin_lock(&tcon->tc_lock);
2434 tcon->need_reconnect = true;
2435 spin_unlock(&tcon->tc_lock);
2436 spin_unlock(&cifs_tcp_ses_lock);
2437 pr_warn_once("Server share %s deleted.\n",
2438 tcon->tree_name);
2439 return true;
2440 }
2441 }
2442 }
2443 spin_unlock(&cifs_tcp_ses_lock);
2444
2445 return false;
2446 }
2447
2448 static int
2449 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2450 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2451 {
2452 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2453 return SMB2_lease_break(0, tcon, cinode->lease_key,
2454 smb2_get_lease_state(cinode));
2455
2456 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2457 CIFS_CACHE_READ(cinode) ? 1 : 0);
2458 }
2459
2460 void
2461 smb2_set_related(struct smb_rqst *rqst)
2462 {
2463 struct smb2_hdr *shdr;
2464
2465 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2466 if (shdr == NULL) {
2467 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2468 return;
2469 }
2470 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2471 }
2472
2473 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2474
2475 void
2476 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2477 {
2478 struct smb2_hdr *shdr;
2479 struct cifs_ses *ses = tcon->ses;
2480 struct TCP_Server_Info *server = ses->server;
2481 unsigned long len = smb_rqst_len(server, rqst);
2482 int i, num_padding;
2483
2484 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2485 if (shdr == NULL) {
2486 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2487 return;
2488 }
2489
2490 /* SMB headers in a compound are 8 byte aligned. */
2491
2492 /* No padding needed */
2493 if (!(len & 7))
2494 goto finished;
2495
2496 num_padding = 8 - (len & 7);
2497 if (!smb3_encryption_required(tcon)) {
2498 /*
2499 * If we do not have encryption then we can just add an extra
2500 * iov for the padding.
2501 */
2502 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2503 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2504 rqst->rq_nvec++;
2505 len += num_padding;
2506 } else {
2507 /*
2508 * We can not add a small padding iov for the encryption case
2509 * because the encryption framework can not handle the padding
2510 * iovs.
2511 * We have to flatten this into a single buffer and add
2512 * the padding to it.
2513 */
2514 for (i = 1; i < rqst->rq_nvec; i++) {
2515 memcpy(rqst->rq_iov[0].iov_base +
2516 rqst->rq_iov[0].iov_len,
2517 rqst->rq_iov[i].iov_base,
2518 rqst->rq_iov[i].iov_len);
2519 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2520 }
2521 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2522 0, num_padding);
2523 rqst->rq_iov[0].iov_len += num_padding;
2524 len += num_padding;
2525 rqst->rq_nvec = 1;
2526 }
2527
2528 finished:
2529 shdr->NextCommand = cpu_to_le32(len);
2530 }
2531
2532 /*
2533 * Passes the query info response back to the caller on success.
2534 * Caller need to free this with free_rsp_buf().
2535 */
2536 int
2537 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2538 const char *path, u32 desired_access,
2539 u32 class, u32 type, u32 output_len,
2540 struct kvec *rsp, int *buftype,
2541 struct cifs_sb_info *cifs_sb)
2542 {
2543 struct smb2_compound_vars *vars;
2544 struct cifs_ses *ses = tcon->ses;
2545 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2546 int flags = CIFS_CP_CREATE_CLOSE_OP;
2547 struct smb_rqst *rqst;
2548 int resp_buftype[3];
2549 struct kvec *rsp_iov;
2550 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2551 struct cifs_open_parms oparms;
2552 struct cifs_fid fid;
2553 int rc;
2554 __le16 *utf16_path;
2555 struct cached_fid *cfid = NULL;
2556
2557 if (!path)
2558 path = "";
2559 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2560 if (!utf16_path)
2561 return -ENOMEM;
2562
2563 if (smb3_encryption_required(tcon))
2564 flags |= CIFS_TRANSFORM_REQ;
2565
2566 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2567 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2568 if (!vars) {
2569 rc = -ENOMEM;
2570 goto out_free_path;
2571 }
2572 rqst = vars->rqst;
2573 rsp_iov = vars->rsp_iov;
2574
2575 /*
2576 * We can only call this for things we know are directories.
2577 */
2578 if (!strcmp(path, ""))
2579 open_cached_dir(xid, tcon, path, cifs_sb, false,
2580 &cfid); /* cfid null if open dir failed */
2581
2582 rqst[0].rq_iov = vars->open_iov;
2583 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2584
2585 oparms = (struct cifs_open_parms) {
2586 .tcon = tcon,
2587 .path = path,
2588 .desired_access = desired_access,
2589 .disposition = FILE_OPEN,
2590 .create_options = cifs_create_options(cifs_sb, 0),
2591 .fid = &fid,
2592 };
2593
2594 rc = SMB2_open_init(tcon, server,
2595 &rqst[0], &oplock, &oparms, utf16_path);
2596 if (rc)
2597 goto qic_exit;
2598 smb2_set_next_command(tcon, &rqst[0]);
2599
2600 rqst[1].rq_iov = &vars->qi_iov;
2601 rqst[1].rq_nvec = 1;
2602
2603 if (cfid) {
2604 rc = SMB2_query_info_init(tcon, server,
2605 &rqst[1],
2606 cfid->fid.persistent_fid,
2607 cfid->fid.volatile_fid,
2608 class, type, 0,
2609 output_len, 0,
2610 NULL);
2611 } else {
2612 rc = SMB2_query_info_init(tcon, server,
2613 &rqst[1],
2614 COMPOUND_FID,
2615 COMPOUND_FID,
2616 class, type, 0,
2617 output_len, 0,
2618 NULL);
2619 }
2620 if (rc)
2621 goto qic_exit;
2622 if (!cfid) {
2623 smb2_set_next_command(tcon, &rqst[1]);
2624 smb2_set_related(&rqst[1]);
2625 }
2626
2627 rqst[2].rq_iov = &vars->close_iov;
2628 rqst[2].rq_nvec = 1;
2629
2630 rc = SMB2_close_init(tcon, server,
2631 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2632 if (rc)
2633 goto qic_exit;
2634 smb2_set_related(&rqst[2]);
2635
2636 if (cfid) {
2637 rc = compound_send_recv(xid, ses, server,
2638 flags, 1, &rqst[1],
2639 &resp_buftype[1], &rsp_iov[1]);
2640 } else {
2641 rc = compound_send_recv(xid, ses, server,
2642 flags, 3, rqst,
2643 resp_buftype, rsp_iov);
2644 }
2645 if (rc) {
2646 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2647 if (rc == -EREMCHG) {
2648 tcon->need_reconnect = true;
2649 pr_warn_once("server share %s deleted\n",
2650 tcon->tree_name);
2651 }
2652 goto qic_exit;
2653 }
2654 *rsp = rsp_iov[1];
2655 *buftype = resp_buftype[1];
2656
2657 qic_exit:
2658 SMB2_open_free(&rqst[0]);
2659 SMB2_query_info_free(&rqst[1]);
2660 SMB2_close_free(&rqst[2]);
2661 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2662 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2663 if (cfid)
2664 close_cached_dir(cfid);
2665 kfree(vars);
2666 out_free_path:
2667 kfree(utf16_path);
2668 return rc;
2669 }
2670
2671 static int
2672 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2673 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2674 {
2675 struct smb2_query_info_rsp *rsp;
2676 struct smb2_fs_full_size_info *info = NULL;
2677 struct kvec rsp_iov = {NULL, 0};
2678 int buftype = CIFS_NO_BUFFER;
2679 int rc;
2680
2681
2682 rc = smb2_query_info_compound(xid, tcon, "",
2683 FILE_READ_ATTRIBUTES,
2684 FS_FULL_SIZE_INFORMATION,
2685 SMB2_O_INFO_FILESYSTEM,
2686 sizeof(struct smb2_fs_full_size_info),
2687 &rsp_iov, &buftype, cifs_sb);
2688 if (rc)
2689 goto qfs_exit;
2690
2691 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2692 buf->f_type = SMB2_SUPER_MAGIC;
2693 info = (struct smb2_fs_full_size_info *)(
2694 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2695 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2696 le32_to_cpu(rsp->OutputBufferLength),
2697 &rsp_iov,
2698 sizeof(struct smb2_fs_full_size_info));
2699 if (!rc)
2700 smb2_copy_fs_info_to_kstatfs(info, buf);
2701
2702 qfs_exit:
2703 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2704 free_rsp_buf(buftype, rsp_iov.iov_base);
2705 return rc;
2706 }
2707
2708 static int
2709 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2710 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2711 {
2712 int rc;
2713 __le16 srch_path = 0; /* Null - open root of share */
2714 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2715 struct cifs_open_parms oparms;
2716 struct cifs_fid fid;
2717
2718 if (!tcon->posix_extensions)
2719 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2720
2721 oparms = (struct cifs_open_parms) {
2722 .tcon = tcon,
2723 .path = "",
2724 .desired_access = FILE_READ_ATTRIBUTES,
2725 .disposition = FILE_OPEN,
2726 .create_options = cifs_create_options(cifs_sb, 0),
2727 .fid = &fid,
2728 };
2729
2730 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2731 NULL, NULL);
2732 if (rc)
2733 return rc;
2734
2735 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2736 fid.volatile_fid, buf);
2737 buf->f_type = SMB2_SUPER_MAGIC;
2738 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2739 return rc;
2740 }
2741
2742 static bool
2743 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2744 {
2745 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2746 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2747 }
2748
2749 static int
2750 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2751 __u64 length, __u32 type, int lock, int unlock, bool wait)
2752 {
2753 if (unlock && !lock)
2754 type = SMB2_LOCKFLAG_UNLOCK;
2755 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2756 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2757 current->tgid, length, offset, type, wait);
2758 }
2759
2760 static void
2761 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2762 {
2763 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2764 }
2765
2766 static void
2767 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2768 {
2769 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2770 }
2771
2772 static void
2773 smb2_new_lease_key(struct cifs_fid *fid)
2774 {
2775 generate_random_uuid(fid->lease_key);
2776 }
2777
2778 static int
2779 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2780 const char *search_name,
2781 struct dfs_info3_param **target_nodes,
2782 unsigned int *num_of_nodes,
2783 const struct nls_table *nls_codepage, int remap)
2784 {
2785 int rc;
2786 __le16 *utf16_path = NULL;
2787 int utf16_path_len = 0;
2788 struct cifs_tcon *tcon;
2789 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2790 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2791 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2792 int retry_count = 0;
2793
2794 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2795
2796 /*
2797 * Try to use the IPC tcon, otherwise just use any
2798 */
2799 tcon = ses->tcon_ipc;
2800 if (tcon == NULL) {
2801 spin_lock(&cifs_tcp_ses_lock);
2802 tcon = list_first_entry_or_null(&ses->tcon_list,
2803 struct cifs_tcon,
2804 tcon_list);
2805 if (tcon)
2806 tcon->tc_count++;
2807 spin_unlock(&cifs_tcp_ses_lock);
2808 }
2809
2810 if (tcon == NULL) {
2811 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2812 ses);
2813 rc = -ENOTCONN;
2814 goto out;
2815 }
2816
2817 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2818 &utf16_path_len,
2819 nls_codepage, remap);
2820 if (!utf16_path) {
2821 rc = -ENOMEM;
2822 goto out;
2823 }
2824
2825 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2826 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2827 if (!dfs_req) {
2828 rc = -ENOMEM;
2829 goto out;
2830 }
2831
2832 /* Highest DFS referral version understood */
2833 dfs_req->MaxReferralLevel = DFS_VERSION;
2834
2835 /* Path to resolve in an UTF-16 null-terminated string */
2836 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2837
2838 do {
2839 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2840 FSCTL_DFS_GET_REFERRALS,
2841 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2842 (char **)&dfs_rsp, &dfs_rsp_size);
2843 if (!is_retryable_error(rc))
2844 break;
2845 usleep_range(512, 2048);
2846 } while (++retry_count < 5);
2847
2848 if (!rc && !dfs_rsp)
2849 rc = -EIO;
2850 if (rc) {
2851 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2852 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2853 goto out;
2854 }
2855
2856 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2857 num_of_nodes, target_nodes,
2858 nls_codepage, remap, search_name,
2859 true /* is_unicode */);
2860 if (rc) {
2861 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2862 goto out;
2863 }
2864
2865 out:
2866 if (tcon && !tcon->ipc) {
2867 /* ipc tcons are not refcounted */
2868 spin_lock(&cifs_tcp_ses_lock);
2869 tcon->tc_count--;
2870 /* tc_count can never go negative */
2871 WARN_ON(tcon->tc_count < 0);
2872 spin_unlock(&cifs_tcp_ses_lock);
2873 }
2874 kfree(utf16_path);
2875 kfree(dfs_req);
2876 kfree(dfs_rsp);
2877 return rc;
2878 }
2879
2880 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2881 static int parse_reparse_posix(struct reparse_posix_data *buf,
2882 struct cifs_sb_info *cifs_sb,
2883 struct cifs_open_info_data *data)
2884 {
2885 unsigned int len;
2886 u64 type;
2887
2888 switch ((type = le64_to_cpu(buf->InodeType))) {
2889 case NFS_SPECFILE_LNK:
2890 len = le16_to_cpu(buf->ReparseDataLength);
2891 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
2892 len, true,
2893 cifs_sb->local_nls);
2894 if (!data->symlink_target)
2895 return -ENOMEM;
2896 convert_delimiter(data->symlink_target, '/');
2897 cifs_dbg(FYI, "%s: target path: %s\n",
2898 __func__, data->symlink_target);
2899 break;
2900 case NFS_SPECFILE_CHR:
2901 case NFS_SPECFILE_BLK:
2902 case NFS_SPECFILE_FIFO:
2903 case NFS_SPECFILE_SOCK:
2904 break;
2905 default:
2906 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
2907 __func__, type);
2908 return -EOPNOTSUPP;
2909 }
2910 return 0;
2911 }
2912
2913 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2914 u32 plen, bool unicode,
2915 struct cifs_sb_info *cifs_sb,
2916 struct cifs_open_info_data *data)
2917 {
2918 unsigned int len;
2919 unsigned int offs;
2920
2921 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2922
2923 offs = le16_to_cpu(sym->SubstituteNameOffset);
2924 len = le16_to_cpu(sym->SubstituteNameLength);
2925 if (offs + 20 > plen || offs + len + 20 > plen) {
2926 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2927 return -EIO;
2928 }
2929
2930 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
2931 len, unicode,
2932 cifs_sb->local_nls);
2933 if (!data->symlink_target)
2934 return -ENOMEM;
2935
2936 convert_delimiter(data->symlink_target, '/');
2937 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
2938
2939 return 0;
2940 }
2941
2942 int parse_reparse_point(struct reparse_data_buffer *buf,
2943 u32 plen, struct cifs_sb_info *cifs_sb,
2944 bool unicode, struct cifs_open_info_data *data)
2945 {
2946 data->reparse.buf = buf;
2947
2948 /* See MS-FSCC 2.1.2 */
2949 switch (le32_to_cpu(buf->ReparseTag)) {
2950 case IO_REPARSE_TAG_NFS:
2951 return parse_reparse_posix((struct reparse_posix_data *)buf,
2952 cifs_sb, data);
2953 case IO_REPARSE_TAG_SYMLINK:
2954 return parse_reparse_symlink(
2955 (struct reparse_symlink_data_buffer *)buf,
2956 plen, unicode, cifs_sb, data);
2957 case IO_REPARSE_TAG_LX_SYMLINK:
2958 case IO_REPARSE_TAG_AF_UNIX:
2959 case IO_REPARSE_TAG_LX_FIFO:
2960 case IO_REPARSE_TAG_LX_CHR:
2961 case IO_REPARSE_TAG_LX_BLK:
2962 return 0;
2963 default:
2964 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
2965 __func__, le32_to_cpu(buf->ReparseTag));
2966 return -EOPNOTSUPP;
2967 }
2968 }
2969
2970 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
2971 struct kvec *rsp_iov,
2972 struct cifs_open_info_data *data)
2973 {
2974 struct reparse_data_buffer *buf;
2975 struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2976 u32 plen = le32_to_cpu(io->OutputCount);
2977
2978 buf = (struct reparse_data_buffer *)((u8 *)io +
2979 le32_to_cpu(io->OutputOffset));
2980 return parse_reparse_point(buf, plen, cifs_sb, true, data);
2981 }
2982
2983 static struct cifs_ntsd *
2984 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2985 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
2986 {
2987 struct cifs_ntsd *pntsd = NULL;
2988 unsigned int xid;
2989 int rc = -EOPNOTSUPP;
2990 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2991
2992 if (IS_ERR(tlink))
2993 return ERR_CAST(tlink);
2994
2995 xid = get_xid();
2996 cifs_dbg(FYI, "trying to get acl\n");
2997
2998 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2999 cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3000 info);
3001 free_xid(xid);
3002
3003 cifs_put_tlink(tlink);
3004
3005 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3006 if (rc)
3007 return ERR_PTR(rc);
3008 return pntsd;
3009
3010 }
3011
3012 static struct cifs_ntsd *
3013 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3014 const char *path, u32 *pacllen, u32 info)
3015 {
3016 struct cifs_ntsd *pntsd = NULL;
3017 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3018 unsigned int xid;
3019 int rc;
3020 struct cifs_tcon *tcon;
3021 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3022 struct cifs_fid fid;
3023 struct cifs_open_parms oparms;
3024 __le16 *utf16_path;
3025
3026 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3027 if (IS_ERR(tlink))
3028 return ERR_CAST(tlink);
3029
3030 tcon = tlink_tcon(tlink);
3031 xid = get_xid();
3032
3033 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3034 if (!utf16_path) {
3035 rc = -ENOMEM;
3036 free_xid(xid);
3037 return ERR_PTR(rc);
3038 }
3039
3040 oparms = (struct cifs_open_parms) {
3041 .tcon = tcon,
3042 .path = path,
3043 .desired_access = READ_CONTROL,
3044 .disposition = FILE_OPEN,
3045 /*
3046 * When querying an ACL, even if the file is a symlink
3047 * we want to open the source not the target, and so
3048 * the protocol requires that the client specify this
3049 * flag when opening a reparse point
3050 */
3051 .create_options = cifs_create_options(cifs_sb, 0) |
3052 OPEN_REPARSE_POINT,
3053 .fid = &fid,
3054 };
3055
3056 if (info & SACL_SECINFO)
3057 oparms.desired_access |= SYSTEM_SECURITY;
3058
3059 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3060 NULL);
3061 kfree(utf16_path);
3062 if (!rc) {
3063 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3064 fid.volatile_fid, (void **)&pntsd, pacllen,
3065 info);
3066 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3067 }
3068
3069 cifs_put_tlink(tlink);
3070 free_xid(xid);
3071
3072 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3073 if (rc)
3074 return ERR_PTR(rc);
3075 return pntsd;
3076 }
3077
3078 static int
3079 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3080 struct inode *inode, const char *path, int aclflag)
3081 {
3082 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3083 unsigned int xid;
3084 int rc, access_flags = 0;
3085 struct cifs_tcon *tcon;
3086 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3087 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3088 struct cifs_fid fid;
3089 struct cifs_open_parms oparms;
3090 __le16 *utf16_path;
3091
3092 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3093 if (IS_ERR(tlink))
3094 return PTR_ERR(tlink);
3095
3096 tcon = tlink_tcon(tlink);
3097 xid = get_xid();
3098
3099 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3100 access_flags |= WRITE_OWNER;
3101 if (aclflag & CIFS_ACL_SACL)
3102 access_flags |= SYSTEM_SECURITY;
3103 if (aclflag & CIFS_ACL_DACL)
3104 access_flags |= WRITE_DAC;
3105
3106 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3107 if (!utf16_path) {
3108 rc = -ENOMEM;
3109 free_xid(xid);
3110 return rc;
3111 }
3112
3113 oparms = (struct cifs_open_parms) {
3114 .tcon = tcon,
3115 .desired_access = access_flags,
3116 .create_options = cifs_create_options(cifs_sb, 0),
3117 .disposition = FILE_OPEN,
3118 .path = path,
3119 .fid = &fid,
3120 };
3121
3122 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3123 NULL, NULL);
3124 kfree(utf16_path);
3125 if (!rc) {
3126 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3127 fid.volatile_fid, pnntsd, acllen, aclflag);
3128 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3129 }
3130
3131 cifs_put_tlink(tlink);
3132 free_xid(xid);
3133 return rc;
3134 }
3135
3136 /* Retrieve an ACL from the server */
3137 static struct cifs_ntsd *
3138 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3139 struct inode *inode, const char *path,
3140 u32 *pacllen, u32 info)
3141 {
3142 struct cifs_ntsd *pntsd = NULL;
3143 struct cifsFileInfo *open_file = NULL;
3144
3145 if (inode && !(info & SACL_SECINFO))
3146 open_file = find_readable_file(CIFS_I(inode), true);
3147 if (!open_file || (info & SACL_SECINFO))
3148 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3149
3150 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3151 cifsFileInfo_put(open_file);
3152 return pntsd;
3153 }
3154
3155 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3156 loff_t offset, loff_t len, unsigned int xid)
3157 {
3158 struct cifsFileInfo *cfile = file->private_data;
3159 struct file_zero_data_information fsctl_buf;
3160
3161 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3162
3163 fsctl_buf.FileOffset = cpu_to_le64(offset);
3164 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3165
3166 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3167 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3168 (char *)&fsctl_buf,
3169 sizeof(struct file_zero_data_information),
3170 0, NULL, NULL);
3171 }
3172
3173 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3174 loff_t offset, loff_t len, bool keep_size)
3175 {
3176 struct cifs_ses *ses = tcon->ses;
3177 struct inode *inode = file_inode(file);
3178 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3179 struct cifsFileInfo *cfile = file->private_data;
3180 unsigned long long new_size;
3181 long rc;
3182 unsigned int xid;
3183
3184 xid = get_xid();
3185
3186 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3187 ses->Suid, offset, len);
3188
3189 inode_lock(inode);
3190 filemap_invalidate_lock(inode->i_mapping);
3191
3192 /*
3193 * We zero the range through ioctl, so we need remove the page caches
3194 * first, otherwise the data may be inconsistent with the server.
3195 */
3196 truncate_pagecache_range(inode, offset, offset + len - 1);
3197
3198 /* if file not oplocked can't be sure whether asking to extend size */
3199 rc = -EOPNOTSUPP;
3200 if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3201 goto zero_range_exit;
3202
3203 rc = smb3_zero_data(file, tcon, offset, len, xid);
3204 if (rc < 0)
3205 goto zero_range_exit;
3206
3207 /*
3208 * do we also need to change the size of the file?
3209 */
3210 new_size = offset + len;
3211 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3212 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3213 cfile->fid.volatile_fid, cfile->pid, new_size);
3214 if (rc >= 0) {
3215 truncate_setsize(inode, new_size);
3216 fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3217 }
3218 }
3219
3220 zero_range_exit:
3221 filemap_invalidate_unlock(inode->i_mapping);
3222 inode_unlock(inode);
3223 free_xid(xid);
3224 if (rc)
3225 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3226 ses->Suid, offset, len, rc);
3227 else
3228 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3229 ses->Suid, offset, len);
3230 return rc;
3231 }
3232
3233 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3234 loff_t offset, loff_t len)
3235 {
3236 struct inode *inode = file_inode(file);
3237 struct cifsFileInfo *cfile = file->private_data;
3238 struct file_zero_data_information fsctl_buf;
3239 long rc;
3240 unsigned int xid;
3241 __u8 set_sparse = 1;
3242
3243 xid = get_xid();
3244
3245 inode_lock(inode);
3246 /* Need to make file sparse, if not already, before freeing range. */
3247 /* Consider adding equivalent for compressed since it could also work */
3248 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3249 rc = -EOPNOTSUPP;
3250 goto out;
3251 }
3252
3253 filemap_invalidate_lock(inode->i_mapping);
3254 /*
3255 * We implement the punch hole through ioctl, so we need remove the page
3256 * caches first, otherwise the data may be inconsistent with the server.
3257 */
3258 truncate_pagecache_range(inode, offset, offset + len - 1);
3259
3260 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3261
3262 fsctl_buf.FileOffset = cpu_to_le64(offset);
3263 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3264
3265 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3266 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3267 (char *)&fsctl_buf,
3268 sizeof(struct file_zero_data_information),
3269 CIFSMaxBufSize, NULL, NULL);
3270 filemap_invalidate_unlock(inode->i_mapping);
3271 out:
3272 inode_unlock(inode);
3273 free_xid(xid);
3274 return rc;
3275 }
3276
3277 static int smb3_simple_fallocate_write_range(unsigned int xid,
3278 struct cifs_tcon *tcon,
3279 struct cifsFileInfo *cfile,
3280 loff_t off, loff_t len,
3281 char *buf)
3282 {
3283 struct cifs_io_parms io_parms = {0};
3284 int nbytes;
3285 int rc = 0;
3286 struct kvec iov[2];
3287
3288 io_parms.netfid = cfile->fid.netfid;
3289 io_parms.pid = current->tgid;
3290 io_parms.tcon = tcon;
3291 io_parms.persistent_fid = cfile->fid.persistent_fid;
3292 io_parms.volatile_fid = cfile->fid.volatile_fid;
3293
3294 while (len) {
3295 io_parms.offset = off;
3296 io_parms.length = len;
3297 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3298 io_parms.length = SMB2_MAX_BUFFER_SIZE;
3299 /* iov[0] is reserved for smb header */
3300 iov[1].iov_base = buf;
3301 iov[1].iov_len = io_parms.length;
3302 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3303 if (rc)
3304 break;
3305 if (nbytes > len)
3306 return -EINVAL;
3307 buf += nbytes;
3308 off += nbytes;
3309 len -= nbytes;
3310 }
3311 return rc;
3312 }
3313
3314 static int smb3_simple_fallocate_range(unsigned int xid,
3315 struct cifs_tcon *tcon,
3316 struct cifsFileInfo *cfile,
3317 loff_t off, loff_t len)
3318 {
3319 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3320 u32 out_data_len;
3321 char *buf = NULL;
3322 loff_t l;
3323 int rc;
3324
3325 in_data.file_offset = cpu_to_le64(off);
3326 in_data.length = cpu_to_le64(len);
3327 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3328 cfile->fid.volatile_fid,
3329 FSCTL_QUERY_ALLOCATED_RANGES,
3330 (char *)&in_data, sizeof(in_data),
3331 1024 * sizeof(struct file_allocated_range_buffer),
3332 (char **)&out_data, &out_data_len);
3333 if (rc)
3334 goto out;
3335
3336 buf = kzalloc(1024 * 1024, GFP_KERNEL);
3337 if (buf == NULL) {
3338 rc = -ENOMEM;
3339 goto out;
3340 }
3341
3342 tmp_data = out_data;
3343 while (len) {
3344 /*
3345 * The rest of the region is unmapped so write it all.
3346 */
3347 if (out_data_len == 0) {
3348 rc = smb3_simple_fallocate_write_range(xid, tcon,
3349 cfile, off, len, buf);
3350 goto out;
3351 }
3352
3353 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3354 rc = -EINVAL;
3355 goto out;
3356 }
3357
3358 if (off < le64_to_cpu(tmp_data->file_offset)) {
3359 /*
3360 * We are at a hole. Write until the end of the region
3361 * or until the next allocated data,
3362 * whichever comes next.
3363 */
3364 l = le64_to_cpu(tmp_data->file_offset) - off;
3365 if (len < l)
3366 l = len;
3367 rc = smb3_simple_fallocate_write_range(xid, tcon,
3368 cfile, off, l, buf);
3369 if (rc)
3370 goto out;
3371 off = off + l;
3372 len = len - l;
3373 if (len == 0)
3374 goto out;
3375 }
3376 /*
3377 * We are at a section of allocated data, just skip forward
3378 * until the end of the data or the end of the region
3379 * we are supposed to fallocate, whichever comes first.
3380 */
3381 l = le64_to_cpu(tmp_data->length);
3382 if (len < l)
3383 l = len;
3384 off += l;
3385 len -= l;
3386
3387 tmp_data = &tmp_data[1];
3388 out_data_len -= sizeof(struct file_allocated_range_buffer);
3389 }
3390
3391 out:
3392 kfree(out_data);
3393 kfree(buf);
3394 return rc;
3395 }
3396
3397
3398 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3399 loff_t off, loff_t len, bool keep_size)
3400 {
3401 struct inode *inode;
3402 struct cifsInodeInfo *cifsi;
3403 struct cifsFileInfo *cfile = file->private_data;
3404 long rc = -EOPNOTSUPP;
3405 unsigned int xid;
3406 loff_t new_eof;
3407
3408 xid = get_xid();
3409
3410 inode = d_inode(cfile->dentry);
3411 cifsi = CIFS_I(inode);
3412
3413 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3414 tcon->ses->Suid, off, len);
3415 /* if file not oplocked can't be sure whether asking to extend size */
3416 if (!CIFS_CACHE_READ(cifsi))
3417 if (keep_size == false) {
3418 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3419 tcon->tid, tcon->ses->Suid, off, len, rc);
3420 free_xid(xid);
3421 return rc;
3422 }
3423
3424 /*
3425 * Extending the file
3426 */
3427 if ((keep_size == false) && i_size_read(inode) < off + len) {
3428 rc = inode_newsize_ok(inode, off + len);
3429 if (rc)
3430 goto out;
3431
3432 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3433 smb2_set_sparse(xid, tcon, cfile, inode, false);
3434
3435 new_eof = off + len;
3436 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3437 cfile->fid.volatile_fid, cfile->pid, new_eof);
3438 if (rc == 0) {
3439 cifsi->server_eof = new_eof;
3440 cifs_setsize(inode, new_eof);
3441 cifs_truncate_page(inode->i_mapping, inode->i_size);
3442 truncate_setsize(inode, new_eof);
3443 }
3444 goto out;
3445 }
3446
3447 /*
3448 * Files are non-sparse by default so falloc may be a no-op
3449 * Must check if file sparse. If not sparse, and since we are not
3450 * extending then no need to do anything since file already allocated
3451 */
3452 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3453 rc = 0;
3454 goto out;
3455 }
3456
3457 if (keep_size == true) {
3458 /*
3459 * We can not preallocate pages beyond the end of the file
3460 * in SMB2
3461 */
3462 if (off >= i_size_read(inode)) {
3463 rc = 0;
3464 goto out;
3465 }
3466 /*
3467 * For fallocates that are partially beyond the end of file,
3468 * clamp len so we only fallocate up to the end of file.
3469 */
3470 if (off + len > i_size_read(inode)) {
3471 len = i_size_read(inode) - off;
3472 }
3473 }
3474
3475 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3476 /*
3477 * At this point, we are trying to fallocate an internal
3478 * regions of a sparse file. Since smb2 does not have a
3479 * fallocate command we have two otions on how to emulate this.
3480 * We can either turn the entire file to become non-sparse
3481 * which we only do if the fallocate is for virtually
3482 * the whole file, or we can overwrite the region with zeroes
3483 * using SMB2_write, which could be prohibitevly expensive
3484 * if len is large.
3485 */
3486 /*
3487 * We are only trying to fallocate a small region so
3488 * just write it with zero.
3489 */
3490 if (len <= 1024 * 1024) {
3491 rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3492 off, len);
3493 goto out;
3494 }
3495
3496 /*
3497 * Check if falloc starts within first few pages of file
3498 * and ends within a few pages of the end of file to
3499 * ensure that most of file is being forced to be
3500 * fallocated now. If so then setting whole file sparse
3501 * ie potentially making a few extra pages at the beginning
3502 * or end of the file non-sparse via set_sparse is harmless.
3503 */
3504 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3505 rc = -EOPNOTSUPP;
3506 goto out;
3507 }
3508 }
3509
3510 smb2_set_sparse(xid, tcon, cfile, inode, false);
3511 rc = 0;
3512
3513 out:
3514 if (rc)
3515 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3516 tcon->ses->Suid, off, len, rc);
3517 else
3518 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3519 tcon->ses->Suid, off, len);
3520
3521 free_xid(xid);
3522 return rc;
3523 }
3524
3525 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3526 loff_t off, loff_t len)
3527 {
3528 int rc;
3529 unsigned int xid;
3530 struct inode *inode = file_inode(file);
3531 struct cifsFileInfo *cfile = file->private_data;
3532 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3533 loff_t old_eof, new_eof;
3534
3535 xid = get_xid();
3536
3537 inode_lock(inode);
3538
3539 old_eof = i_size_read(inode);
3540 if ((off >= old_eof) ||
3541 off + len >= old_eof) {
3542 rc = -EINVAL;
3543 goto out;
3544 }
3545
3546 filemap_invalidate_lock(inode->i_mapping);
3547 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3548 if (rc < 0)
3549 goto out_2;
3550
3551 truncate_pagecache_range(inode, off, old_eof);
3552
3553 rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3554 old_eof - off - len, off);
3555 if (rc < 0)
3556 goto out_2;
3557
3558 new_eof = old_eof - len;
3559 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3560 cfile->fid.volatile_fid, cfile->pid, new_eof);
3561 if (rc < 0)
3562 goto out_2;
3563
3564 rc = 0;
3565
3566 cifsi->server_eof = i_size_read(inode) - len;
3567 truncate_setsize(inode, cifsi->server_eof);
3568 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3569 out_2:
3570 filemap_invalidate_unlock(inode->i_mapping);
3571 out:
3572 inode_unlock(inode);
3573 free_xid(xid);
3574 return rc;
3575 }
3576
3577 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3578 loff_t off, loff_t len)
3579 {
3580 int rc;
3581 unsigned int xid;
3582 struct cifsFileInfo *cfile = file->private_data;
3583 struct inode *inode = file_inode(file);
3584 __u64 count, old_eof, new_eof;
3585
3586 xid = get_xid();
3587
3588 inode_lock(inode);
3589
3590 old_eof = i_size_read(inode);
3591 if (off >= old_eof) {
3592 rc = -EINVAL;
3593 goto out;
3594 }
3595
3596 count = old_eof - off;
3597 new_eof = old_eof + len;
3598
3599 filemap_invalidate_lock(inode->i_mapping);
3600 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1);
3601 if (rc < 0)
3602 goto out_2;
3603 truncate_pagecache_range(inode, off, old_eof);
3604
3605 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3606 cfile->fid.volatile_fid, cfile->pid, new_eof);
3607 if (rc < 0)
3608 goto out_2;
3609
3610 truncate_setsize(inode, new_eof);
3611 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3612
3613 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3614 if (rc < 0)
3615 goto out_2;
3616
3617 rc = smb3_zero_data(file, tcon, off, len, xid);
3618 if (rc < 0)
3619 goto out_2;
3620
3621 rc = 0;
3622 out_2:
3623 filemap_invalidate_unlock(inode->i_mapping);
3624 out:
3625 inode_unlock(inode);
3626 free_xid(xid);
3627 return rc;
3628 }
3629
3630 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3631 {
3632 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3633 struct cifsInodeInfo *cifsi;
3634 struct inode *inode;
3635 int rc = 0;
3636 struct file_allocated_range_buffer in_data, *out_data = NULL;
3637 u32 out_data_len;
3638 unsigned int xid;
3639
3640 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3641 return generic_file_llseek(file, offset, whence);
3642
3643 inode = d_inode(cfile->dentry);
3644 cifsi = CIFS_I(inode);
3645
3646 if (offset < 0 || offset >= i_size_read(inode))
3647 return -ENXIO;
3648
3649 xid = get_xid();
3650 /*
3651 * We need to be sure that all dirty pages are written as they
3652 * might fill holes on the server.
3653 * Note that we also MUST flush any written pages since at least
3654 * some servers (Windows2016) will not reflect recent writes in
3655 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3656 */
3657 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3658 if (wrcfile) {
3659 filemap_write_and_wait(inode->i_mapping);
3660 smb2_flush_file(xid, tcon, &wrcfile->fid);
3661 cifsFileInfo_put(wrcfile);
3662 }
3663
3664 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3665 if (whence == SEEK_HOLE)
3666 offset = i_size_read(inode);
3667 goto lseek_exit;
3668 }
3669
3670 in_data.file_offset = cpu_to_le64(offset);
3671 in_data.length = cpu_to_le64(i_size_read(inode));
3672
3673 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3674 cfile->fid.volatile_fid,
3675 FSCTL_QUERY_ALLOCATED_RANGES,
3676 (char *)&in_data, sizeof(in_data),
3677 sizeof(struct file_allocated_range_buffer),
3678 (char **)&out_data, &out_data_len);
3679 if (rc == -E2BIG)
3680 rc = 0;
3681 if (rc)
3682 goto lseek_exit;
3683
3684 if (whence == SEEK_HOLE && out_data_len == 0)
3685 goto lseek_exit;
3686
3687 if (whence == SEEK_DATA && out_data_len == 0) {
3688 rc = -ENXIO;
3689 goto lseek_exit;
3690 }
3691
3692 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3693 rc = -EINVAL;
3694 goto lseek_exit;
3695 }
3696 if (whence == SEEK_DATA) {
3697 offset = le64_to_cpu(out_data->file_offset);
3698 goto lseek_exit;
3699 }
3700 if (offset < le64_to_cpu(out_data->file_offset))
3701 goto lseek_exit;
3702
3703 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3704
3705 lseek_exit:
3706 free_xid(xid);
3707 kfree(out_data);
3708 if (!rc)
3709 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3710 else
3711 return rc;
3712 }
3713
3714 static int smb3_fiemap(struct cifs_tcon *tcon,
3715 struct cifsFileInfo *cfile,
3716 struct fiemap_extent_info *fei, u64 start, u64 len)
3717 {
3718 unsigned int xid;
3719 struct file_allocated_range_buffer in_data, *out_data;
3720 u32 out_data_len;
3721 int i, num, rc, flags, last_blob;
3722 u64 next;
3723
3724 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3725 if (rc)
3726 return rc;
3727
3728 xid = get_xid();
3729 again:
3730 in_data.file_offset = cpu_to_le64(start);
3731 in_data.length = cpu_to_le64(len);
3732
3733 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3734 cfile->fid.volatile_fid,
3735 FSCTL_QUERY_ALLOCATED_RANGES,
3736 (char *)&in_data, sizeof(in_data),
3737 1024 * sizeof(struct file_allocated_range_buffer),
3738 (char **)&out_data, &out_data_len);
3739 if (rc == -E2BIG) {
3740 last_blob = 0;
3741 rc = 0;
3742 } else
3743 last_blob = 1;
3744 if (rc)
3745 goto out;
3746
3747 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3748 rc = -EINVAL;
3749 goto out;
3750 }
3751 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3752 rc = -EINVAL;
3753 goto out;
3754 }
3755
3756 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3757 for (i = 0; i < num; i++) {
3758 flags = 0;
3759 if (i == num - 1 && last_blob)
3760 flags |= FIEMAP_EXTENT_LAST;
3761
3762 rc = fiemap_fill_next_extent(fei,
3763 le64_to_cpu(out_data[i].file_offset),
3764 le64_to_cpu(out_data[i].file_offset),
3765 le64_to_cpu(out_data[i].length),
3766 flags);
3767 if (rc < 0)
3768 goto out;
3769 if (rc == 1) {
3770 rc = 0;
3771 goto out;
3772 }
3773 }
3774
3775 if (!last_blob) {
3776 next = le64_to_cpu(out_data[num - 1].file_offset) +
3777 le64_to_cpu(out_data[num - 1].length);
3778 len = len - (next - start);
3779 start = next;
3780 goto again;
3781 }
3782
3783 out:
3784 free_xid(xid);
3785 kfree(out_data);
3786 return rc;
3787 }
3788
3789 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3790 loff_t off, loff_t len)
3791 {
3792 /* KEEP_SIZE already checked for by do_fallocate */
3793 if (mode & FALLOC_FL_PUNCH_HOLE)
3794 return smb3_punch_hole(file, tcon, off, len);
3795 else if (mode & FALLOC_FL_ZERO_RANGE) {
3796 if (mode & FALLOC_FL_KEEP_SIZE)
3797 return smb3_zero_range(file, tcon, off, len, true);
3798 return smb3_zero_range(file, tcon, off, len, false);
3799 } else if (mode == FALLOC_FL_KEEP_SIZE)
3800 return smb3_simple_falloc(file, tcon, off, len, true);
3801 else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3802 return smb3_collapse_range(file, tcon, off, len);
3803 else if (mode == FALLOC_FL_INSERT_RANGE)
3804 return smb3_insert_range(file, tcon, off, len);
3805 else if (mode == 0)
3806 return smb3_simple_falloc(file, tcon, off, len, false);
3807
3808 return -EOPNOTSUPP;
3809 }
3810
3811 static void
3812 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3813 struct cifsInodeInfo *cinode, __u32 oplock,
3814 unsigned int epoch, bool *purge_cache)
3815 {
3816 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3817 }
3818
3819 static void
3820 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3821 unsigned int epoch, bool *purge_cache);
3822
3823 static void
3824 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3825 struct cifsInodeInfo *cinode, __u32 oplock,
3826 unsigned int epoch, bool *purge_cache)
3827 {
3828 unsigned int old_state = cinode->oplock;
3829 unsigned int old_epoch = cinode->epoch;
3830 unsigned int new_state;
3831
3832 if (epoch > old_epoch) {
3833 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3834 cinode->epoch = epoch;
3835 }
3836
3837 new_state = cinode->oplock;
3838 *purge_cache = false;
3839
3840 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3841 (new_state & CIFS_CACHE_READ_FLG) == 0)
3842 *purge_cache = true;
3843 else if (old_state == new_state && (epoch - old_epoch > 1))
3844 *purge_cache = true;
3845 }
3846
3847 static void
3848 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3849 unsigned int epoch, bool *purge_cache)
3850 {
3851 oplock &= 0xFF;
3852 cinode->lease_granted = false;
3853 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3854 return;
3855 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3856 cinode->oplock = CIFS_CACHE_RHW_FLG;
3857 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3858 &cinode->netfs.inode);
3859 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3860 cinode->oplock = CIFS_CACHE_RW_FLG;
3861 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3862 &cinode->netfs.inode);
3863 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3864 cinode->oplock = CIFS_CACHE_READ_FLG;
3865 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3866 &cinode->netfs.inode);
3867 } else
3868 cinode->oplock = 0;
3869 }
3870
3871 static void
3872 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3873 unsigned int epoch, bool *purge_cache)
3874 {
3875 char message[5] = {0};
3876 unsigned int new_oplock = 0;
3877
3878 oplock &= 0xFF;
3879 cinode->lease_granted = true;
3880 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3881 return;
3882
3883 /* Check if the server granted an oplock rather than a lease */
3884 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3885 return smb2_set_oplock_level(cinode, oplock, epoch,
3886 purge_cache);
3887
3888 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3889 new_oplock |= CIFS_CACHE_READ_FLG;
3890 strcat(message, "R");
3891 }
3892 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3893 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3894 strcat(message, "H");
3895 }
3896 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3897 new_oplock |= CIFS_CACHE_WRITE_FLG;
3898 strcat(message, "W");
3899 }
3900 if (!new_oplock)
3901 strncpy(message, "None", sizeof(message));
3902
3903 cinode->oplock = new_oplock;
3904 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3905 &cinode->netfs.inode);
3906 }
3907
3908 static void
3909 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3910 unsigned int epoch, bool *purge_cache)
3911 {
3912 unsigned int old_oplock = cinode->oplock;
3913
3914 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3915
3916 if (purge_cache) {
3917 *purge_cache = false;
3918 if (old_oplock == CIFS_CACHE_READ_FLG) {
3919 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3920 (epoch - cinode->epoch > 0))
3921 *purge_cache = true;
3922 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3923 (epoch - cinode->epoch > 1))
3924 *purge_cache = true;
3925 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3926 (epoch - cinode->epoch > 1))
3927 *purge_cache = true;
3928 else if (cinode->oplock == 0 &&
3929 (epoch - cinode->epoch > 0))
3930 *purge_cache = true;
3931 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3932 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3933 (epoch - cinode->epoch > 0))
3934 *purge_cache = true;
3935 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3936 (epoch - cinode->epoch > 1))
3937 *purge_cache = true;
3938 }
3939 cinode->epoch = epoch;
3940 }
3941 }
3942
3943 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
3944 static bool
3945 smb2_is_read_op(__u32 oplock)
3946 {
3947 return oplock == SMB2_OPLOCK_LEVEL_II;
3948 }
3949 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
3950
3951 static bool
3952 smb21_is_read_op(__u32 oplock)
3953 {
3954 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3955 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3956 }
3957
3958 static __le32
3959 map_oplock_to_lease(u8 oplock)
3960 {
3961 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3962 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
3963 else if (oplock == SMB2_OPLOCK_LEVEL_II)
3964 return SMB2_LEASE_READ_CACHING_LE;
3965 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3966 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
3967 SMB2_LEASE_WRITE_CACHING_LE;
3968 return 0;
3969 }
3970
3971 static char *
3972 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3973 {
3974 struct create_lease *buf;
3975
3976 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3977 if (!buf)
3978 return NULL;
3979
3980 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3981 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3982
3983 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3984 (struct create_lease, lcontext));
3985 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3986 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3987 (struct create_lease, Name));
3988 buf->ccontext.NameLength = cpu_to_le16(4);
3989 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3990 buf->Name[0] = 'R';
3991 buf->Name[1] = 'q';
3992 buf->Name[2] = 'L';
3993 buf->Name[3] = 's';
3994 return (char *)buf;
3995 }
3996
3997 static char *
3998 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3999 {
4000 struct create_lease_v2 *buf;
4001
4002 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4003 if (!buf)
4004 return NULL;
4005
4006 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4007 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4008
4009 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4010 (struct create_lease_v2, lcontext));
4011 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4012 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4013 (struct create_lease_v2, Name));
4014 buf->ccontext.NameLength = cpu_to_le16(4);
4015 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4016 buf->Name[0] = 'R';
4017 buf->Name[1] = 'q';
4018 buf->Name[2] = 'L';
4019 buf->Name[3] = 's';
4020 return (char *)buf;
4021 }
4022
4023 static __u8
4024 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4025 {
4026 struct create_lease *lc = (struct create_lease *)buf;
4027
4028 *epoch = 0; /* not used */
4029 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4030 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4031 return le32_to_cpu(lc->lcontext.LeaseState);
4032 }
4033
4034 static __u8
4035 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4036 {
4037 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4038
4039 *epoch = le16_to_cpu(lc->lcontext.Epoch);
4040 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4041 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4042 if (lease_key)
4043 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4044 return le32_to_cpu(lc->lcontext.LeaseState);
4045 }
4046
4047 static unsigned int
4048 smb2_wp_retry_size(struct inode *inode)
4049 {
4050 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4051 SMB2_MAX_BUFFER_SIZE);
4052 }
4053
4054 static bool
4055 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4056 {
4057 return !cfile->invalidHandle;
4058 }
4059
4060 static void
4061 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4062 struct smb_rqst *old_rq, __le16 cipher_type)
4063 {
4064 struct smb2_hdr *shdr =
4065 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4066
4067 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4068 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4069 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4070 tr_hdr->Flags = cpu_to_le16(0x01);
4071 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4072 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4073 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4074 else
4075 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4076 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4077 }
4078
4079 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4080 int num_rqst, const u8 *sig, u8 **iv,
4081 struct aead_request **req, struct sg_table *sgt,
4082 unsigned int *num_sgs, size_t *sensitive_size)
4083 {
4084 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4085 unsigned int iv_size = crypto_aead_ivsize(tfm);
4086 unsigned int len;
4087 u8 *p;
4088
4089 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4090 if (IS_ERR_VALUE((long)(int)*num_sgs))
4091 return ERR_PTR(*num_sgs);
4092
4093 len = iv_size;
4094 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4095 len = ALIGN(len, crypto_tfm_ctx_alignment());
4096 len += req_size;
4097 len = ALIGN(len, __alignof__(struct scatterlist));
4098 len += array_size(*num_sgs, sizeof(struct scatterlist));
4099 *sensitive_size = len;
4100
4101 p = kvzalloc(len, GFP_NOFS);
4102 if (!p)
4103 return ERR_PTR(-ENOMEM);
4104
4105 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4106 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4107 crypto_tfm_ctx_alignment());
4108 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4109 __alignof__(struct scatterlist));
4110 return p;
4111 }
4112
4113 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4114 int num_rqst, const u8 *sig, u8 **iv,
4115 struct aead_request **req, struct scatterlist **sgl,
4116 size_t *sensitive_size)
4117 {
4118 struct sg_table sgtable = {};
4119 unsigned int skip, num_sgs, i, j;
4120 ssize_t rc;
4121 void *p;
4122
4123 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4124 &num_sgs, sensitive_size);
4125 if (IS_ERR(p))
4126 return ERR_CAST(p);
4127
4128 sg_init_marker(sgtable.sgl, num_sgs);
4129
4130 /*
4131 * The first rqst has a transform header where the
4132 * first 20 bytes are not part of the encrypted blob.
4133 */
4134 skip = 20;
4135
4136 for (i = 0; i < num_rqst; i++) {
4137 struct iov_iter *iter = &rqst[i].rq_iter;
4138 size_t count = iov_iter_count(iter);
4139
4140 for (j = 0; j < rqst[i].rq_nvec; j++) {
4141 cifs_sg_set_buf(&sgtable,
4142 rqst[i].rq_iov[j].iov_base + skip,
4143 rqst[i].rq_iov[j].iov_len - skip);
4144
4145 /* See the above comment on the 'skip' assignment */
4146 skip = 0;
4147 }
4148 sgtable.orig_nents = sgtable.nents;
4149
4150 rc = extract_iter_to_sg(iter, count, &sgtable,
4151 num_sgs - sgtable.nents, 0);
4152 iov_iter_revert(iter, rc);
4153 sgtable.orig_nents = sgtable.nents;
4154 }
4155
4156 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4157 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4158 *sgl = sgtable.sgl;
4159 return p;
4160 }
4161
4162 static int
4163 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4164 {
4165 struct TCP_Server_Info *pserver;
4166 struct cifs_ses *ses;
4167 u8 *ses_enc_key;
4168
4169 /* If server is a channel, select the primary channel */
4170 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4171
4172 spin_lock(&cifs_tcp_ses_lock);
4173 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4174 if (ses->Suid == ses_id) {
4175 spin_lock(&ses->ses_lock);
4176 ses_enc_key = enc ? ses->smb3encryptionkey :
4177 ses->smb3decryptionkey;
4178 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4179 spin_unlock(&ses->ses_lock);
4180 spin_unlock(&cifs_tcp_ses_lock);
4181 return 0;
4182 }
4183 }
4184 spin_unlock(&cifs_tcp_ses_lock);
4185
4186 trace_smb3_ses_not_found(ses_id);
4187
4188 return -EAGAIN;
4189 }
4190 /*
4191 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4192 * iov[0] - transform header (associate data),
4193 * iov[1-N] - SMB2 header and pages - data to encrypt.
4194 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4195 * untouched.
4196 */
4197 static int
4198 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4199 struct smb_rqst *rqst, int enc)
4200 {
4201 struct smb2_transform_hdr *tr_hdr =
4202 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4203 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4204 int rc = 0;
4205 struct scatterlist *sg;
4206 u8 sign[SMB2_SIGNATURE_SIZE] = {};
4207 u8 key[SMB3_ENC_DEC_KEY_SIZE];
4208 struct aead_request *req;
4209 u8 *iv;
4210 DECLARE_CRYPTO_WAIT(wait);
4211 struct crypto_aead *tfm;
4212 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4213 void *creq;
4214 size_t sensitive_size;
4215
4216 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4217 if (rc) {
4218 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4219 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4220 return rc;
4221 }
4222
4223 rc = smb3_crypto_aead_allocate(server);
4224 if (rc) {
4225 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4226 return rc;
4227 }
4228
4229 tfm = enc ? server->secmech.enc : server->secmech.dec;
4230
4231 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4232 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4233 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4234 else
4235 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4236
4237 if (rc) {
4238 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4239 return rc;
4240 }
4241
4242 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4243 if (rc) {
4244 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4245 return rc;
4246 }
4247
4248 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4249 &sensitive_size);
4250 if (IS_ERR(creq))
4251 return PTR_ERR(creq);
4252
4253 if (!enc) {
4254 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4255 crypt_len += SMB2_SIGNATURE_SIZE;
4256 }
4257
4258 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4259 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4260 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4261 else {
4262 iv[0] = 3;
4263 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4264 }
4265
4266 aead_request_set_tfm(req, tfm);
4267 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4268 aead_request_set_ad(req, assoc_data_len);
4269
4270 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4271 crypto_req_done, &wait);
4272
4273 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4274 : crypto_aead_decrypt(req), &wait);
4275
4276 if (!rc && enc)
4277 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4278
4279 kvfree_sensitive(creq, sensitive_size);
4280 return rc;
4281 }
4282
4283 /*
4284 * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4285 */
4286 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4287 {
4288 struct folio *folio;
4289
4290 XA_STATE(xas, buffer, 0);
4291
4292 rcu_read_lock();
4293 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4294 folio_put(folio);
4295 }
4296 rcu_read_unlock();
4297 xa_destroy(buffer);
4298 }
4299
4300 void
4301 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4302 {
4303 int i;
4304
4305 for (i = 0; i < num_rqst; i++)
4306 if (!xa_empty(&rqst[i].rq_buffer))
4307 cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4308 }
4309
4310 /*
4311 * This function will initialize new_rq and encrypt the content.
4312 * The first entry, new_rq[0], only contains a single iov which contains
4313 * a smb2_transform_hdr and is pre-allocated by the caller.
4314 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4315 *
4316 * The end result is an array of smb_rqst structures where the first structure
4317 * only contains a single iov for the transform header which we then can pass
4318 * to crypt_message().
4319 *
4320 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4321 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4322 */
4323 static int
4324 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4325 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4326 {
4327 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4328 struct page *page;
4329 unsigned int orig_len = 0;
4330 int i, j;
4331 int rc = -ENOMEM;
4332
4333 for (i = 1; i < num_rqst; i++) {
4334 struct smb_rqst *old = &old_rq[i - 1];
4335 struct smb_rqst *new = &new_rq[i];
4336 struct xarray *buffer = &new->rq_buffer;
4337 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4338
4339 orig_len += smb_rqst_len(server, old);
4340 new->rq_iov = old->rq_iov;
4341 new->rq_nvec = old->rq_nvec;
4342
4343 xa_init(buffer);
4344
4345 if (size > 0) {
4346 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4347
4348 for (j = 0; j < npages; j++) {
4349 void *o;
4350
4351 rc = -ENOMEM;
4352 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4353 if (!page)
4354 goto err_free;
4355 page->index = j;
4356 o = xa_store(buffer, j, page, GFP_KERNEL);
4357 if (xa_is_err(o)) {
4358 rc = xa_err(o);
4359 put_page(page);
4360 goto err_free;
4361 }
4362
4363 xa_set_mark(buffer, j, XA_MARK_0);
4364
4365 seg = min_t(size_t, size - copied, PAGE_SIZE);
4366 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4367 rc = -EFAULT;
4368 goto err_free;
4369 }
4370 copied += seg;
4371 }
4372 iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4373 buffer, 0, size);
4374 new->rq_iter_size = size;
4375 }
4376 }
4377
4378 /* fill the 1st iov with a transform header */
4379 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4380
4381 rc = crypt_message(server, num_rqst, new_rq, 1);
4382 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4383 if (rc)
4384 goto err_free;
4385
4386 return rc;
4387
4388 err_free:
4389 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4390 return rc;
4391 }
4392
4393 static int
4394 smb3_is_transform_hdr(void *buf)
4395 {
4396 struct smb2_transform_hdr *trhdr = buf;
4397
4398 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4399 }
4400
4401 static int
4402 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4403 unsigned int buf_data_size, struct iov_iter *iter,
4404 bool is_offloaded)
4405 {
4406 struct kvec iov[2];
4407 struct smb_rqst rqst = {NULL};
4408 size_t iter_size = 0;
4409 int rc;
4410
4411 iov[0].iov_base = buf;
4412 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4413 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4414 iov[1].iov_len = buf_data_size;
4415
4416 rqst.rq_iov = iov;
4417 rqst.rq_nvec = 2;
4418 if (iter) {
4419 rqst.rq_iter = *iter;
4420 rqst.rq_iter_size = iov_iter_count(iter);
4421 iter_size = iov_iter_count(iter);
4422 }
4423
4424 rc = crypt_message(server, 1, &rqst, 0);
4425 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4426
4427 if (rc)
4428 return rc;
4429
4430 memmove(buf, iov[1].iov_base, buf_data_size);
4431
4432 if (!is_offloaded)
4433 server->total_read = buf_data_size + iter_size;
4434
4435 return rc;
4436 }
4437
4438 static int
4439 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4440 unsigned int skip, struct iov_iter *iter)
4441 {
4442 struct page *page;
4443 unsigned long index;
4444
4445 xa_for_each(pages, index, page) {
4446 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4447
4448 n = copy_page_to_iter(page, skip, len, iter);
4449 if (n != len) {
4450 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4451 return -EIO;
4452 }
4453 data_size -= n;
4454 skip = 0;
4455 }
4456
4457 return 0;
4458 }
4459
4460 static int
4461 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4462 char *buf, unsigned int buf_len, struct xarray *pages,
4463 unsigned int pages_len, bool is_offloaded)
4464 {
4465 unsigned int data_offset;
4466 unsigned int data_len;
4467 unsigned int cur_off;
4468 unsigned int cur_page_idx;
4469 unsigned int pad_len;
4470 struct cifs_readdata *rdata = mid->callback_data;
4471 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4472 int length;
4473 bool use_rdma_mr = false;
4474
4475 if (shdr->Command != SMB2_READ) {
4476 cifs_server_dbg(VFS, "only big read responses are supported\n");
4477 return -EOPNOTSUPP;
4478 }
4479
4480 if (server->ops->is_session_expired &&
4481 server->ops->is_session_expired(buf)) {
4482 if (!is_offloaded)
4483 cifs_reconnect(server, true);
4484 return -1;
4485 }
4486
4487 if (server->ops->is_status_pending &&
4488 server->ops->is_status_pending(buf, server))
4489 return -1;
4490
4491 /* set up first two iov to get credits */
4492 rdata->iov[0].iov_base = buf;
4493 rdata->iov[0].iov_len = 0;
4494 rdata->iov[1].iov_base = buf;
4495 rdata->iov[1].iov_len =
4496 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4497 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4498 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4499 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4500 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4501
4502 rdata->result = server->ops->map_error(buf, true);
4503 if (rdata->result != 0) {
4504 cifs_dbg(FYI, "%s: server returned error %d\n",
4505 __func__, rdata->result);
4506 /* normal error on read response */
4507 if (is_offloaded)
4508 mid->mid_state = MID_RESPONSE_RECEIVED;
4509 else
4510 dequeue_mid(mid, false);
4511 return 0;
4512 }
4513
4514 data_offset = server->ops->read_data_offset(buf);
4515 #ifdef CONFIG_CIFS_SMB_DIRECT
4516 use_rdma_mr = rdata->mr;
4517 #endif
4518 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4519
4520 if (data_offset < server->vals->read_rsp_size) {
4521 /*
4522 * win2k8 sometimes sends an offset of 0 when the read
4523 * is beyond the EOF. Treat it as if the data starts just after
4524 * the header.
4525 */
4526 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4527 __func__, data_offset);
4528 data_offset = server->vals->read_rsp_size;
4529 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4530 /* data_offset is beyond the end of smallbuf */
4531 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4532 __func__, data_offset);
4533 rdata->result = -EIO;
4534 if (is_offloaded)
4535 mid->mid_state = MID_RESPONSE_MALFORMED;
4536 else
4537 dequeue_mid(mid, rdata->result);
4538 return 0;
4539 }
4540
4541 pad_len = data_offset - server->vals->read_rsp_size;
4542
4543 if (buf_len <= data_offset) {
4544 /* read response payload is in pages */
4545 cur_page_idx = pad_len / PAGE_SIZE;
4546 cur_off = pad_len % PAGE_SIZE;
4547
4548 if (cur_page_idx != 0) {
4549 /* data offset is beyond the 1st page of response */
4550 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4551 __func__, data_offset);
4552 rdata->result = -EIO;
4553 if (is_offloaded)
4554 mid->mid_state = MID_RESPONSE_MALFORMED;
4555 else
4556 dequeue_mid(mid, rdata->result);
4557 return 0;
4558 }
4559
4560 if (data_len > pages_len - pad_len) {
4561 /* data_len is corrupt -- discard frame */
4562 rdata->result = -EIO;
4563 if (is_offloaded)
4564 mid->mid_state = MID_RESPONSE_MALFORMED;
4565 else
4566 dequeue_mid(mid, rdata->result);
4567 return 0;
4568 }
4569
4570 /* Copy the data to the output I/O iterator. */
4571 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4572 cur_off, &rdata->iter);
4573 if (rdata->result != 0) {
4574 if (is_offloaded)
4575 mid->mid_state = MID_RESPONSE_MALFORMED;
4576 else
4577 dequeue_mid(mid, rdata->result);
4578 return 0;
4579 }
4580 rdata->got_bytes = pages_len;
4581
4582 } else if (buf_len >= data_offset + data_len) {
4583 /* read response payload is in buf */
4584 WARN_ONCE(pages && !xa_empty(pages),
4585 "read data can be either in buf or in pages");
4586 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4587 if (length < 0)
4588 return length;
4589 rdata->got_bytes = data_len;
4590 } else {
4591 /* read response payload cannot be in both buf and pages */
4592 WARN_ONCE(1, "buf can not contain only a part of read data");
4593 rdata->result = -EIO;
4594 if (is_offloaded)
4595 mid->mid_state = MID_RESPONSE_MALFORMED;
4596 else
4597 dequeue_mid(mid, rdata->result);
4598 return 0;
4599 }
4600
4601 if (is_offloaded)
4602 mid->mid_state = MID_RESPONSE_RECEIVED;
4603 else
4604 dequeue_mid(mid, false);
4605 return 0;
4606 }
4607
4608 struct smb2_decrypt_work {
4609 struct work_struct decrypt;
4610 struct TCP_Server_Info *server;
4611 struct xarray buffer;
4612 char *buf;
4613 unsigned int len;
4614 };
4615
4616
4617 static void smb2_decrypt_offload(struct work_struct *work)
4618 {
4619 struct smb2_decrypt_work *dw = container_of(work,
4620 struct smb2_decrypt_work, decrypt);
4621 int rc;
4622 struct mid_q_entry *mid;
4623 struct iov_iter iter;
4624
4625 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4626 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4627 &iter, true);
4628 if (rc) {
4629 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4630 goto free_pages;
4631 }
4632
4633 dw->server->lstrp = jiffies;
4634 mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4635 if (mid == NULL)
4636 cifs_dbg(FYI, "mid not found\n");
4637 else {
4638 mid->decrypted = true;
4639 rc = handle_read_data(dw->server, mid, dw->buf,
4640 dw->server->vals->read_rsp_size,
4641 &dw->buffer, dw->len,
4642 true);
4643 if (rc >= 0) {
4644 #ifdef CONFIG_CIFS_STATS2
4645 mid->when_received = jiffies;
4646 #endif
4647 if (dw->server->ops->is_network_name_deleted)
4648 dw->server->ops->is_network_name_deleted(dw->buf,
4649 dw->server);
4650
4651 mid->callback(mid);
4652 } else {
4653 spin_lock(&dw->server->srv_lock);
4654 if (dw->server->tcpStatus == CifsNeedReconnect) {
4655 spin_lock(&dw->server->mid_lock);
4656 mid->mid_state = MID_RETRY_NEEDED;
4657 spin_unlock(&dw->server->mid_lock);
4658 spin_unlock(&dw->server->srv_lock);
4659 mid->callback(mid);
4660 } else {
4661 spin_lock(&dw->server->mid_lock);
4662 mid->mid_state = MID_REQUEST_SUBMITTED;
4663 mid->mid_flags &= ~(MID_DELETED);
4664 list_add_tail(&mid->qhead,
4665 &dw->server->pending_mid_q);
4666 spin_unlock(&dw->server->mid_lock);
4667 spin_unlock(&dw->server->srv_lock);
4668 }
4669 }
4670 release_mid(mid);
4671 }
4672
4673 free_pages:
4674 cifs_clear_xarray_buffer(&dw->buffer);
4675 cifs_small_buf_release(dw->buf);
4676 kfree(dw);
4677 }
4678
4679
4680 static int
4681 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4682 int *num_mids)
4683 {
4684 struct page *page;
4685 char *buf = server->smallbuf;
4686 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4687 struct iov_iter iter;
4688 unsigned int len, npages;
4689 unsigned int buflen = server->pdu_size;
4690 int rc;
4691 int i = 0;
4692 struct smb2_decrypt_work *dw;
4693
4694 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4695 if (!dw)
4696 return -ENOMEM;
4697 xa_init(&dw->buffer);
4698 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4699 dw->server = server;
4700
4701 *num_mids = 1;
4702 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4703 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4704
4705 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4706 if (rc < 0)
4707 goto free_dw;
4708 server->total_read += rc;
4709
4710 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4711 server->vals->read_rsp_size;
4712 dw->len = len;
4713 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4714
4715 rc = -ENOMEM;
4716 for (; i < npages; i++) {
4717 void *old;
4718
4719 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4720 if (!page)
4721 goto discard_data;
4722 page->index = i;
4723 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4724 if (xa_is_err(old)) {
4725 rc = xa_err(old);
4726 put_page(page);
4727 goto discard_data;
4728 }
4729 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4730 }
4731
4732 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4733
4734 /* Read the data into the buffer and clear excess bufferage. */
4735 rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4736 if (rc < 0)
4737 goto discard_data;
4738
4739 server->total_read += rc;
4740 if (rc < npages * PAGE_SIZE)
4741 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4742 iov_iter_revert(&iter, npages * PAGE_SIZE);
4743 iov_iter_truncate(&iter, dw->len);
4744
4745 rc = cifs_discard_remaining_data(server);
4746 if (rc)
4747 goto free_pages;
4748
4749 /*
4750 * For large reads, offload to different thread for better performance,
4751 * use more cores decrypting which can be expensive
4752 */
4753
4754 if ((server->min_offload) && (server->in_flight > 1) &&
4755 (server->pdu_size >= server->min_offload)) {
4756 dw->buf = server->smallbuf;
4757 server->smallbuf = (char *)cifs_small_buf_get();
4758
4759 queue_work(decrypt_wq, &dw->decrypt);
4760 *num_mids = 0; /* worker thread takes care of finding mid */
4761 return -1;
4762 }
4763
4764 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4765 &iter, false);
4766 if (rc)
4767 goto free_pages;
4768
4769 *mid = smb2_find_mid(server, buf);
4770 if (*mid == NULL) {
4771 cifs_dbg(FYI, "mid not found\n");
4772 } else {
4773 cifs_dbg(FYI, "mid found\n");
4774 (*mid)->decrypted = true;
4775 rc = handle_read_data(server, *mid, buf,
4776 server->vals->read_rsp_size,
4777 &dw->buffer, dw->len, false);
4778 if (rc >= 0) {
4779 if (server->ops->is_network_name_deleted) {
4780 server->ops->is_network_name_deleted(buf,
4781 server);
4782 }
4783 }
4784 }
4785
4786 free_pages:
4787 cifs_clear_xarray_buffer(&dw->buffer);
4788 free_dw:
4789 kfree(dw);
4790 return rc;
4791 discard_data:
4792 cifs_discard_remaining_data(server);
4793 goto free_pages;
4794 }
4795
4796 static int
4797 receive_encrypted_standard(struct TCP_Server_Info *server,
4798 struct mid_q_entry **mids, char **bufs,
4799 int *num_mids)
4800 {
4801 int ret, length;
4802 char *buf = server->smallbuf;
4803 struct smb2_hdr *shdr;
4804 unsigned int pdu_length = server->pdu_size;
4805 unsigned int buf_size;
4806 unsigned int next_cmd;
4807 struct mid_q_entry *mid_entry;
4808 int next_is_large;
4809 char *next_buffer = NULL;
4810
4811 *num_mids = 0;
4812
4813 /* switch to large buffer if too big for a small one */
4814 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4815 server->large_buf = true;
4816 memcpy(server->bigbuf, buf, server->total_read);
4817 buf = server->bigbuf;
4818 }
4819
4820 /* now read the rest */
4821 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4822 pdu_length - HEADER_SIZE(server) + 1);
4823 if (length < 0)
4824 return length;
4825 server->total_read += length;
4826
4827 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4828 length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4829 if (length)
4830 return length;
4831
4832 next_is_large = server->large_buf;
4833 one_more:
4834 shdr = (struct smb2_hdr *)buf;
4835 next_cmd = le32_to_cpu(shdr->NextCommand);
4836 if (next_cmd) {
4837 if (WARN_ON_ONCE(next_cmd > pdu_length))
4838 return -1;
4839 if (next_is_large)
4840 next_buffer = (char *)cifs_buf_get();
4841 else
4842 next_buffer = (char *)cifs_small_buf_get();
4843 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4844 }
4845
4846 mid_entry = smb2_find_mid(server, buf);
4847 if (mid_entry == NULL)
4848 cifs_dbg(FYI, "mid not found\n");
4849 else {
4850 cifs_dbg(FYI, "mid found\n");
4851 mid_entry->decrypted = true;
4852 mid_entry->resp_buf_size = server->pdu_size;
4853 }
4854
4855 if (*num_mids >= MAX_COMPOUND) {
4856 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4857 return -1;
4858 }
4859 bufs[*num_mids] = buf;
4860 mids[(*num_mids)++] = mid_entry;
4861
4862 if (mid_entry && mid_entry->handle)
4863 ret = mid_entry->handle(server, mid_entry);
4864 else
4865 ret = cifs_handle_standard(server, mid_entry);
4866
4867 if (ret == 0 && next_cmd) {
4868 pdu_length -= next_cmd;
4869 server->large_buf = next_is_large;
4870 if (next_is_large)
4871 server->bigbuf = buf = next_buffer;
4872 else
4873 server->smallbuf = buf = next_buffer;
4874 goto one_more;
4875 } else if (ret != 0) {
4876 /*
4877 * ret != 0 here means that we didn't get to handle_mid() thus
4878 * server->smallbuf and server->bigbuf are still valid. We need
4879 * to free next_buffer because it is not going to be used
4880 * anywhere.
4881 */
4882 if (next_is_large)
4883 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4884 else
4885 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4886 }
4887
4888 return ret;
4889 }
4890
4891 static int
4892 smb3_receive_transform(struct TCP_Server_Info *server,
4893 struct mid_q_entry **mids, char **bufs, int *num_mids)
4894 {
4895 char *buf = server->smallbuf;
4896 unsigned int pdu_length = server->pdu_size;
4897 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4898 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4899
4900 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4901 sizeof(struct smb2_hdr)) {
4902 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4903 pdu_length);
4904 cifs_reconnect(server, true);
4905 return -ECONNABORTED;
4906 }
4907
4908 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4909 cifs_server_dbg(VFS, "Transform message is broken\n");
4910 cifs_reconnect(server, true);
4911 return -ECONNABORTED;
4912 }
4913
4914 /* TODO: add support for compounds containing READ. */
4915 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4916 return receive_encrypted_read(server, &mids[0], num_mids);
4917 }
4918
4919 return receive_encrypted_standard(server, mids, bufs, num_mids);
4920 }
4921
4922 int
4923 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4924 {
4925 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4926
4927 return handle_read_data(server, mid, buf, server->pdu_size,
4928 NULL, 0, false);
4929 }
4930
4931 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
4932 unsigned int *noff)
4933 {
4934 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
4935 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4936
4937 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
4938 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
4939 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
4940 return -EINVAL;
4941 } else {
4942 *noff = le32_to_cpu(hdr->NextCommand);
4943 }
4944 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
4945 return -EINVAL;
4946 return 0;
4947 }
4948
4949 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
4950 struct dentry *dentry, struct cifs_tcon *tcon,
4951 const char *full_path, umode_t mode, dev_t dev)
4952 {
4953 struct cifs_open_info_data buf = {};
4954 struct TCP_Server_Info *server = tcon->ses->server;
4955 struct cifs_open_parms oparms;
4956 struct cifs_io_parms io_parms = {};
4957 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4958 struct cifs_fid fid;
4959 unsigned int bytes_written;
4960 struct win_dev *pdev;
4961 struct kvec iov[2];
4962 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
4963 int rc;
4964
4965 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
4966 return -EPERM;
4967
4968 oparms = (struct cifs_open_parms) {
4969 .tcon = tcon,
4970 .cifs_sb = cifs_sb,
4971 .desired_access = GENERIC_WRITE,
4972 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
4973 CREATE_OPTION_SPECIAL),
4974 .disposition = FILE_CREATE,
4975 .path = full_path,
4976 .fid = &fid,
4977 };
4978
4979 rc = server->ops->open(xid, &oparms, &oplock, &buf);
4980 if (rc)
4981 return rc;
4982
4983 /*
4984 * BB Do not bother to decode buf since no local inode yet to put
4985 * timestamps in, but we can reuse it safely.
4986 */
4987 pdev = (struct win_dev *)&buf.fi;
4988 io_parms.pid = current->tgid;
4989 io_parms.tcon = tcon;
4990 io_parms.length = sizeof(*pdev);
4991 iov[1].iov_base = pdev;
4992 iov[1].iov_len = sizeof(*pdev);
4993 if (S_ISCHR(mode)) {
4994 memcpy(pdev->type, "IntxCHR", 8);
4995 pdev->major = cpu_to_le64(MAJOR(dev));
4996 pdev->minor = cpu_to_le64(MINOR(dev));
4997 } else if (S_ISBLK(mode)) {
4998 memcpy(pdev->type, "IntxBLK", 8);
4999 pdev->major = cpu_to_le64(MAJOR(dev));
5000 pdev->minor = cpu_to_le64(MINOR(dev));
5001 } else if (S_ISFIFO(mode)) {
5002 memcpy(pdev->type, "LnxFIFO", 8);
5003 }
5004
5005 rc = server->ops->sync_write(xid, &fid, &io_parms,
5006 &bytes_written, iov, 1);
5007 server->ops->close(xid, tcon, &fid);
5008 d_drop(dentry);
5009 /* FIXME: add code here to set EAs */
5010 cifs_free_open_info(&buf);
5011 return rc;
5012 }
5013
5014 static inline u64 mode_nfs_type(mode_t mode)
5015 {
5016 switch (mode & S_IFMT) {
5017 case S_IFBLK: return NFS_SPECFILE_BLK;
5018 case S_IFCHR: return NFS_SPECFILE_CHR;
5019 case S_IFIFO: return NFS_SPECFILE_FIFO;
5020 case S_IFSOCK: return NFS_SPECFILE_SOCK;
5021 }
5022 return 0;
5023 }
5024
5025 static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
5026 mode_t mode, dev_t dev,
5027 struct kvec *iov)
5028 {
5029 u64 type;
5030 u16 len, dlen;
5031
5032 len = sizeof(*buf);
5033
5034 switch ((type = mode_nfs_type(mode))) {
5035 case NFS_SPECFILE_BLK:
5036 case NFS_SPECFILE_CHR:
5037 dlen = sizeof(__le64);
5038 break;
5039 case NFS_SPECFILE_FIFO:
5040 case NFS_SPECFILE_SOCK:
5041 dlen = 0;
5042 break;
5043 default:
5044 return -EOPNOTSUPP;
5045 }
5046
5047 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS);
5048 buf->Reserved = 0;
5049 buf->InodeType = cpu_to_le64(type);
5050 buf->ReparseDataLength = cpu_to_le16(len + dlen -
5051 sizeof(struct reparse_data_buffer));
5052 *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) |
5053 MINOR(dev));
5054 iov->iov_base = buf;
5055 iov->iov_len = len + dlen;
5056 return 0;
5057 }
5058
5059 static int nfs_make_node(unsigned int xid, struct inode *inode,
5060 struct dentry *dentry, struct cifs_tcon *tcon,
5061 const char *full_path, umode_t mode, dev_t dev)
5062 {
5063 struct cifs_open_info_data data;
5064 struct reparse_posix_data *p;
5065 struct inode *new;
5066 struct kvec iov;
5067 __u8 buf[sizeof(*p) + sizeof(__le64)];
5068 int rc;
5069
5070 p = (struct reparse_posix_data *)buf;
5071 rc = nfs_set_reparse_buf(p, mode, dev, &iov);
5072 if (rc)
5073 return rc;
5074
5075 data = (struct cifs_open_info_data) {
5076 .reparse_point = true,
5077 .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, },
5078 };
5079
5080 new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
5081 tcon, full_path, &iov);
5082 if (!IS_ERR(new))
5083 d_instantiate(dentry, new);
5084 else
5085 rc = PTR_ERR(new);
5086 cifs_free_open_info(&data);
5087 return rc;
5088 }
5089
5090 static int smb2_create_reparse_symlink(const unsigned int xid,
5091 struct inode *inode,
5092 struct dentry *dentry,
5093 struct cifs_tcon *tcon,
5094 const char *full_path,
5095 const char *symname)
5096 {
5097 struct reparse_symlink_data_buffer *buf = NULL;
5098 struct cifs_open_info_data data;
5099 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5100 struct inode *new;
5101 struct kvec iov;
5102 __le16 *path;
5103 char *sym;
5104 u16 len, plen;
5105 int rc = 0;
5106
5107 sym = kstrdup(symname, GFP_KERNEL);
5108 if (!sym)
5109 return -ENOMEM;
5110
5111 data = (struct cifs_open_info_data) {
5112 .reparse_point = true,
5113 .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, },
5114 .symlink_target = sym,
5115 };
5116
5117 path = cifs_convert_path_to_utf16(symname, cifs_sb);
5118 if (!path) {
5119 rc = -ENOMEM;
5120 goto out;
5121 }
5122
5123 plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX);
5124 len = sizeof(*buf) + plen * 2;
5125 buf = kzalloc(len, GFP_KERNEL);
5126 if (!buf) {
5127 rc = -ENOMEM;
5128 goto out;
5129 }
5130
5131 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK);
5132 buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer));
5133 buf->SubstituteNameOffset = cpu_to_le16(plen);
5134 buf->SubstituteNameLength = cpu_to_le16(plen);
5135 memcpy(&buf->PathBuffer[plen], path, plen);
5136 buf->PrintNameOffset = 0;
5137 buf->PrintNameLength = cpu_to_le16(plen);
5138 memcpy(buf->PathBuffer, path, plen);
5139 buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0);
5140
5141 iov.iov_base = buf;
5142 iov.iov_len = len;
5143 new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
5144 tcon, full_path, &iov);
5145 if (!IS_ERR(new))
5146 d_instantiate(dentry, new);
5147 else
5148 rc = PTR_ERR(new);
5149 out:
5150 kfree(path);
5151 cifs_free_open_info(&data);
5152 kfree(buf);
5153 return rc;
5154 }
5155
5156 static int smb2_make_node(unsigned int xid, struct inode *inode,
5157 struct dentry *dentry, struct cifs_tcon *tcon,
5158 const char *full_path, umode_t mode, dev_t dev)
5159 {
5160 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5161 int rc;
5162
5163 /*
5164 * Check if mounted with mount parm 'sfu' mount parm.
5165 * SFU emulation should work with all servers, but only
5166 * supports block and char device (no socket & fifo),
5167 * and was used by default in earlier versions of Windows
5168 */
5169 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
5170 rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
5171 full_path, mode, dev);
5172 } else {
5173 rc = nfs_make_node(xid, inode, dentry, tcon,
5174 full_path, mode, dev);
5175 }
5176 return rc;
5177 }
5178
5179 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5180 struct smb_version_operations smb20_operations = {
5181 .compare_fids = smb2_compare_fids,
5182 .setup_request = smb2_setup_request,
5183 .setup_async_request = smb2_setup_async_request,
5184 .check_receive = smb2_check_receive,
5185 .add_credits = smb2_add_credits,
5186 .set_credits = smb2_set_credits,
5187 .get_credits_field = smb2_get_credits_field,
5188 .get_credits = smb2_get_credits,
5189 .wait_mtu_credits = cifs_wait_mtu_credits,
5190 .get_next_mid = smb2_get_next_mid,
5191 .revert_current_mid = smb2_revert_current_mid,
5192 .read_data_offset = smb2_read_data_offset,
5193 .read_data_length = smb2_read_data_length,
5194 .map_error = map_smb2_to_linux_error,
5195 .find_mid = smb2_find_mid,
5196 .check_message = smb2_check_message,
5197 .dump_detail = smb2_dump_detail,
5198 .clear_stats = smb2_clear_stats,
5199 .print_stats = smb2_print_stats,
5200 .is_oplock_break = smb2_is_valid_oplock_break,
5201 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5202 .downgrade_oplock = smb2_downgrade_oplock,
5203 .need_neg = smb2_need_neg,
5204 .negotiate = smb2_negotiate,
5205 .negotiate_wsize = smb2_negotiate_wsize,
5206 .negotiate_rsize = smb2_negotiate_rsize,
5207 .sess_setup = SMB2_sess_setup,
5208 .logoff = SMB2_logoff,
5209 .tree_connect = SMB2_tcon,
5210 .tree_disconnect = SMB2_tdis,
5211 .qfs_tcon = smb2_qfs_tcon,
5212 .is_path_accessible = smb2_is_path_accessible,
5213 .can_echo = smb2_can_echo,
5214 .echo = SMB2_echo,
5215 .query_path_info = smb2_query_path_info,
5216 .query_reparse_point = smb2_query_reparse_point,
5217 .get_srv_inum = smb2_get_srv_inum,
5218 .query_file_info = smb2_query_file_info,
5219 .set_path_size = smb2_set_path_size,
5220 .set_file_size = smb2_set_file_size,
5221 .set_file_info = smb2_set_file_info,
5222 .set_compression = smb2_set_compression,
5223 .mkdir = smb2_mkdir,
5224 .mkdir_setinfo = smb2_mkdir_setinfo,
5225 .rmdir = smb2_rmdir,
5226 .unlink = smb2_unlink,
5227 .rename = smb2_rename_path,
5228 .create_hardlink = smb2_create_hardlink,
5229 .parse_reparse_point = smb2_parse_reparse_point,
5230 .query_mf_symlink = smb3_query_mf_symlink,
5231 .create_mf_symlink = smb3_create_mf_symlink,
5232 .create_reparse_symlink = smb2_create_reparse_symlink,
5233 .open = smb2_open_file,
5234 .set_fid = smb2_set_fid,
5235 .close = smb2_close_file,
5236 .flush = smb2_flush_file,
5237 .async_readv = smb2_async_readv,
5238 .async_writev = smb2_async_writev,
5239 .sync_read = smb2_sync_read,
5240 .sync_write = smb2_sync_write,
5241 .query_dir_first = smb2_query_dir_first,
5242 .query_dir_next = smb2_query_dir_next,
5243 .close_dir = smb2_close_dir,
5244 .calc_smb_size = smb2_calc_size,
5245 .is_status_pending = smb2_is_status_pending,
5246 .is_session_expired = smb2_is_session_expired,
5247 .oplock_response = smb2_oplock_response,
5248 .queryfs = smb2_queryfs,
5249 .mand_lock = smb2_mand_lock,
5250 .mand_unlock_range = smb2_unlock_range,
5251 .push_mand_locks = smb2_push_mandatory_locks,
5252 .get_lease_key = smb2_get_lease_key,
5253 .set_lease_key = smb2_set_lease_key,
5254 .new_lease_key = smb2_new_lease_key,
5255 .calc_signature = smb2_calc_signature,
5256 .is_read_op = smb2_is_read_op,
5257 .set_oplock_level = smb2_set_oplock_level,
5258 .create_lease_buf = smb2_create_lease_buf,
5259 .parse_lease_buf = smb2_parse_lease_buf,
5260 .copychunk_range = smb2_copychunk_range,
5261 .wp_retry_size = smb2_wp_retry_size,
5262 .dir_needs_close = smb2_dir_needs_close,
5263 .get_dfs_refer = smb2_get_dfs_refer,
5264 .select_sectype = smb2_select_sectype,
5265 #ifdef CONFIG_CIFS_XATTR
5266 .query_all_EAs = smb2_query_eas,
5267 .set_EA = smb2_set_ea,
5268 #endif /* CIFS_XATTR */
5269 .get_acl = get_smb2_acl,
5270 .get_acl_by_fid = get_smb2_acl_by_fid,
5271 .set_acl = set_smb2_acl,
5272 .next_header = smb2_next_header,
5273 .ioctl_query_info = smb2_ioctl_query_info,
5274 .make_node = smb2_make_node,
5275 .fiemap = smb3_fiemap,
5276 .llseek = smb3_llseek,
5277 .is_status_io_timeout = smb2_is_status_io_timeout,
5278 .is_network_name_deleted = smb2_is_network_name_deleted,
5279 };
5280 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5281
5282 struct smb_version_operations smb21_operations = {
5283 .compare_fids = smb2_compare_fids,
5284 .setup_request = smb2_setup_request,
5285 .setup_async_request = smb2_setup_async_request,
5286 .check_receive = smb2_check_receive,
5287 .add_credits = smb2_add_credits,
5288 .set_credits = smb2_set_credits,
5289 .get_credits_field = smb2_get_credits_field,
5290 .get_credits = smb2_get_credits,
5291 .wait_mtu_credits = smb2_wait_mtu_credits,
5292 .adjust_credits = smb2_adjust_credits,
5293 .get_next_mid = smb2_get_next_mid,
5294 .revert_current_mid = smb2_revert_current_mid,
5295 .read_data_offset = smb2_read_data_offset,
5296 .read_data_length = smb2_read_data_length,
5297 .map_error = map_smb2_to_linux_error,
5298 .find_mid = smb2_find_mid,
5299 .check_message = smb2_check_message,
5300 .dump_detail = smb2_dump_detail,
5301 .clear_stats = smb2_clear_stats,
5302 .print_stats = smb2_print_stats,
5303 .is_oplock_break = smb2_is_valid_oplock_break,
5304 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5305 .downgrade_oplock = smb2_downgrade_oplock,
5306 .need_neg = smb2_need_neg,
5307 .negotiate = smb2_negotiate,
5308 .negotiate_wsize = smb2_negotiate_wsize,
5309 .negotiate_rsize = smb2_negotiate_rsize,
5310 .sess_setup = SMB2_sess_setup,
5311 .logoff = SMB2_logoff,
5312 .tree_connect = SMB2_tcon,
5313 .tree_disconnect = SMB2_tdis,
5314 .qfs_tcon = smb2_qfs_tcon,
5315 .is_path_accessible = smb2_is_path_accessible,
5316 .can_echo = smb2_can_echo,
5317 .echo = SMB2_echo,
5318 .query_path_info = smb2_query_path_info,
5319 .query_reparse_point = smb2_query_reparse_point,
5320 .get_srv_inum = smb2_get_srv_inum,
5321 .query_file_info = smb2_query_file_info,
5322 .set_path_size = smb2_set_path_size,
5323 .set_file_size = smb2_set_file_size,
5324 .set_file_info = smb2_set_file_info,
5325 .set_compression = smb2_set_compression,
5326 .mkdir = smb2_mkdir,
5327 .mkdir_setinfo = smb2_mkdir_setinfo,
5328 .rmdir = smb2_rmdir,
5329 .unlink = smb2_unlink,
5330 .rename = smb2_rename_path,
5331 .create_hardlink = smb2_create_hardlink,
5332 .parse_reparse_point = smb2_parse_reparse_point,
5333 .query_mf_symlink = smb3_query_mf_symlink,
5334 .create_mf_symlink = smb3_create_mf_symlink,
5335 .create_reparse_symlink = smb2_create_reparse_symlink,
5336 .open = smb2_open_file,
5337 .set_fid = smb2_set_fid,
5338 .close = smb2_close_file,
5339 .flush = smb2_flush_file,
5340 .async_readv = smb2_async_readv,
5341 .async_writev = smb2_async_writev,
5342 .sync_read = smb2_sync_read,
5343 .sync_write = smb2_sync_write,
5344 .query_dir_first = smb2_query_dir_first,
5345 .query_dir_next = smb2_query_dir_next,
5346 .close_dir = smb2_close_dir,
5347 .calc_smb_size = smb2_calc_size,
5348 .is_status_pending = smb2_is_status_pending,
5349 .is_session_expired = smb2_is_session_expired,
5350 .oplock_response = smb2_oplock_response,
5351 .queryfs = smb2_queryfs,
5352 .mand_lock = smb2_mand_lock,
5353 .mand_unlock_range = smb2_unlock_range,
5354 .push_mand_locks = smb2_push_mandatory_locks,
5355 .get_lease_key = smb2_get_lease_key,
5356 .set_lease_key = smb2_set_lease_key,
5357 .new_lease_key = smb2_new_lease_key,
5358 .calc_signature = smb2_calc_signature,
5359 .is_read_op = smb21_is_read_op,
5360 .set_oplock_level = smb21_set_oplock_level,
5361 .create_lease_buf = smb2_create_lease_buf,
5362 .parse_lease_buf = smb2_parse_lease_buf,
5363 .copychunk_range = smb2_copychunk_range,
5364 .wp_retry_size = smb2_wp_retry_size,
5365 .dir_needs_close = smb2_dir_needs_close,
5366 .enum_snapshots = smb3_enum_snapshots,
5367 .notify = smb3_notify,
5368 .get_dfs_refer = smb2_get_dfs_refer,
5369 .select_sectype = smb2_select_sectype,
5370 #ifdef CONFIG_CIFS_XATTR
5371 .query_all_EAs = smb2_query_eas,
5372 .set_EA = smb2_set_ea,
5373 #endif /* CIFS_XATTR */
5374 .get_acl = get_smb2_acl,
5375 .get_acl_by_fid = get_smb2_acl_by_fid,
5376 .set_acl = set_smb2_acl,
5377 .next_header = smb2_next_header,
5378 .ioctl_query_info = smb2_ioctl_query_info,
5379 .make_node = smb2_make_node,
5380 .fiemap = smb3_fiemap,
5381 .llseek = smb3_llseek,
5382 .is_status_io_timeout = smb2_is_status_io_timeout,
5383 .is_network_name_deleted = smb2_is_network_name_deleted,
5384 };
5385
5386 struct smb_version_operations smb30_operations = {
5387 .compare_fids = smb2_compare_fids,
5388 .setup_request = smb2_setup_request,
5389 .setup_async_request = smb2_setup_async_request,
5390 .check_receive = smb2_check_receive,
5391 .add_credits = smb2_add_credits,
5392 .set_credits = smb2_set_credits,
5393 .get_credits_field = smb2_get_credits_field,
5394 .get_credits = smb2_get_credits,
5395 .wait_mtu_credits = smb2_wait_mtu_credits,
5396 .adjust_credits = smb2_adjust_credits,
5397 .get_next_mid = smb2_get_next_mid,
5398 .revert_current_mid = smb2_revert_current_mid,
5399 .read_data_offset = smb2_read_data_offset,
5400 .read_data_length = smb2_read_data_length,
5401 .map_error = map_smb2_to_linux_error,
5402 .find_mid = smb2_find_mid,
5403 .check_message = smb2_check_message,
5404 .dump_detail = smb2_dump_detail,
5405 .clear_stats = smb2_clear_stats,
5406 .print_stats = smb2_print_stats,
5407 .dump_share_caps = smb2_dump_share_caps,
5408 .is_oplock_break = smb2_is_valid_oplock_break,
5409 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5410 .downgrade_oplock = smb3_downgrade_oplock,
5411 .need_neg = smb2_need_neg,
5412 .negotiate = smb2_negotiate,
5413 .negotiate_wsize = smb3_negotiate_wsize,
5414 .negotiate_rsize = smb3_negotiate_rsize,
5415 .sess_setup = SMB2_sess_setup,
5416 .logoff = SMB2_logoff,
5417 .tree_connect = SMB2_tcon,
5418 .tree_disconnect = SMB2_tdis,
5419 .qfs_tcon = smb3_qfs_tcon,
5420 .is_path_accessible = smb2_is_path_accessible,
5421 .can_echo = smb2_can_echo,
5422 .echo = SMB2_echo,
5423 .query_path_info = smb2_query_path_info,
5424 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5425 .query_reparse_point = smb2_query_reparse_point,
5426 .get_srv_inum = smb2_get_srv_inum,
5427 .query_file_info = smb2_query_file_info,
5428 .set_path_size = smb2_set_path_size,
5429 .set_file_size = smb2_set_file_size,
5430 .set_file_info = smb2_set_file_info,
5431 .set_compression = smb2_set_compression,
5432 .mkdir = smb2_mkdir,
5433 .mkdir_setinfo = smb2_mkdir_setinfo,
5434 .rmdir = smb2_rmdir,
5435 .unlink = smb2_unlink,
5436 .rename = smb2_rename_path,
5437 .create_hardlink = smb2_create_hardlink,
5438 .parse_reparse_point = smb2_parse_reparse_point,
5439 .query_mf_symlink = smb3_query_mf_symlink,
5440 .create_mf_symlink = smb3_create_mf_symlink,
5441 .create_reparse_symlink = smb2_create_reparse_symlink,
5442 .open = smb2_open_file,
5443 .set_fid = smb2_set_fid,
5444 .close = smb2_close_file,
5445 .close_getattr = smb2_close_getattr,
5446 .flush = smb2_flush_file,
5447 .async_readv = smb2_async_readv,
5448 .async_writev = smb2_async_writev,
5449 .sync_read = smb2_sync_read,
5450 .sync_write = smb2_sync_write,
5451 .query_dir_first = smb2_query_dir_first,
5452 .query_dir_next = smb2_query_dir_next,
5453 .close_dir = smb2_close_dir,
5454 .calc_smb_size = smb2_calc_size,
5455 .is_status_pending = smb2_is_status_pending,
5456 .is_session_expired = smb2_is_session_expired,
5457 .oplock_response = smb2_oplock_response,
5458 .queryfs = smb2_queryfs,
5459 .mand_lock = smb2_mand_lock,
5460 .mand_unlock_range = smb2_unlock_range,
5461 .push_mand_locks = smb2_push_mandatory_locks,
5462 .get_lease_key = smb2_get_lease_key,
5463 .set_lease_key = smb2_set_lease_key,
5464 .new_lease_key = smb2_new_lease_key,
5465 .generate_signingkey = generate_smb30signingkey,
5466 .calc_signature = smb3_calc_signature,
5467 .set_integrity = smb3_set_integrity,
5468 .is_read_op = smb21_is_read_op,
5469 .set_oplock_level = smb3_set_oplock_level,
5470 .create_lease_buf = smb3_create_lease_buf,
5471 .parse_lease_buf = smb3_parse_lease_buf,
5472 .copychunk_range = smb2_copychunk_range,
5473 .duplicate_extents = smb2_duplicate_extents,
5474 .validate_negotiate = smb3_validate_negotiate,
5475 .wp_retry_size = smb2_wp_retry_size,
5476 .dir_needs_close = smb2_dir_needs_close,
5477 .fallocate = smb3_fallocate,
5478 .enum_snapshots = smb3_enum_snapshots,
5479 .notify = smb3_notify,
5480 .init_transform_rq = smb3_init_transform_rq,
5481 .is_transform_hdr = smb3_is_transform_hdr,
5482 .receive_transform = smb3_receive_transform,
5483 .get_dfs_refer = smb2_get_dfs_refer,
5484 .select_sectype = smb2_select_sectype,
5485 #ifdef CONFIG_CIFS_XATTR
5486 .query_all_EAs = smb2_query_eas,
5487 .set_EA = smb2_set_ea,
5488 #endif /* CIFS_XATTR */
5489 .get_acl = get_smb2_acl,
5490 .get_acl_by_fid = get_smb2_acl_by_fid,
5491 .set_acl = set_smb2_acl,
5492 .next_header = smb2_next_header,
5493 .ioctl_query_info = smb2_ioctl_query_info,
5494 .make_node = smb2_make_node,
5495 .fiemap = smb3_fiemap,
5496 .llseek = smb3_llseek,
5497 .is_status_io_timeout = smb2_is_status_io_timeout,
5498 .is_network_name_deleted = smb2_is_network_name_deleted,
5499 };
5500
5501 struct smb_version_operations smb311_operations = {
5502 .compare_fids = smb2_compare_fids,
5503 .setup_request = smb2_setup_request,
5504 .setup_async_request = smb2_setup_async_request,
5505 .check_receive = smb2_check_receive,
5506 .add_credits = smb2_add_credits,
5507 .set_credits = smb2_set_credits,
5508 .get_credits_field = smb2_get_credits_field,
5509 .get_credits = smb2_get_credits,
5510 .wait_mtu_credits = smb2_wait_mtu_credits,
5511 .adjust_credits = smb2_adjust_credits,
5512 .get_next_mid = smb2_get_next_mid,
5513 .revert_current_mid = smb2_revert_current_mid,
5514 .read_data_offset = smb2_read_data_offset,
5515 .read_data_length = smb2_read_data_length,
5516 .map_error = map_smb2_to_linux_error,
5517 .find_mid = smb2_find_mid,
5518 .check_message = smb2_check_message,
5519 .dump_detail = smb2_dump_detail,
5520 .clear_stats = smb2_clear_stats,
5521 .print_stats = smb2_print_stats,
5522 .dump_share_caps = smb2_dump_share_caps,
5523 .is_oplock_break = smb2_is_valid_oplock_break,
5524 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5525 .downgrade_oplock = smb3_downgrade_oplock,
5526 .need_neg = smb2_need_neg,
5527 .negotiate = smb2_negotiate,
5528 .negotiate_wsize = smb3_negotiate_wsize,
5529 .negotiate_rsize = smb3_negotiate_rsize,
5530 .sess_setup = SMB2_sess_setup,
5531 .logoff = SMB2_logoff,
5532 .tree_connect = SMB2_tcon,
5533 .tree_disconnect = SMB2_tdis,
5534 .qfs_tcon = smb3_qfs_tcon,
5535 .is_path_accessible = smb2_is_path_accessible,
5536 .can_echo = smb2_can_echo,
5537 .echo = SMB2_echo,
5538 .query_path_info = smb2_query_path_info,
5539 .query_reparse_point = smb2_query_reparse_point,
5540 .get_srv_inum = smb2_get_srv_inum,
5541 .query_file_info = smb2_query_file_info,
5542 .set_path_size = smb2_set_path_size,
5543 .set_file_size = smb2_set_file_size,
5544 .set_file_info = smb2_set_file_info,
5545 .set_compression = smb2_set_compression,
5546 .mkdir = smb2_mkdir,
5547 .mkdir_setinfo = smb2_mkdir_setinfo,
5548 .posix_mkdir = smb311_posix_mkdir,
5549 .rmdir = smb2_rmdir,
5550 .unlink = smb2_unlink,
5551 .rename = smb2_rename_path,
5552 .create_hardlink = smb2_create_hardlink,
5553 .parse_reparse_point = smb2_parse_reparse_point,
5554 .query_mf_symlink = smb3_query_mf_symlink,
5555 .create_mf_symlink = smb3_create_mf_symlink,
5556 .create_reparse_symlink = smb2_create_reparse_symlink,
5557 .open = smb2_open_file,
5558 .set_fid = smb2_set_fid,
5559 .close = smb2_close_file,
5560 .close_getattr = smb2_close_getattr,
5561 .flush = smb2_flush_file,
5562 .async_readv = smb2_async_readv,
5563 .async_writev = smb2_async_writev,
5564 .sync_read = smb2_sync_read,
5565 .sync_write = smb2_sync_write,
5566 .query_dir_first = smb2_query_dir_first,
5567 .query_dir_next = smb2_query_dir_next,
5568 .close_dir = smb2_close_dir,
5569 .calc_smb_size = smb2_calc_size,
5570 .is_status_pending = smb2_is_status_pending,
5571 .is_session_expired = smb2_is_session_expired,
5572 .oplock_response = smb2_oplock_response,
5573 .queryfs = smb311_queryfs,
5574 .mand_lock = smb2_mand_lock,
5575 .mand_unlock_range = smb2_unlock_range,
5576 .push_mand_locks = smb2_push_mandatory_locks,
5577 .get_lease_key = smb2_get_lease_key,
5578 .set_lease_key = smb2_set_lease_key,
5579 .new_lease_key = smb2_new_lease_key,
5580 .generate_signingkey = generate_smb311signingkey,
5581 .calc_signature = smb3_calc_signature,
5582 .set_integrity = smb3_set_integrity,
5583 .is_read_op = smb21_is_read_op,
5584 .set_oplock_level = smb3_set_oplock_level,
5585 .create_lease_buf = smb3_create_lease_buf,
5586 .parse_lease_buf = smb3_parse_lease_buf,
5587 .copychunk_range = smb2_copychunk_range,
5588 .duplicate_extents = smb2_duplicate_extents,
5589 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5590 .wp_retry_size = smb2_wp_retry_size,
5591 .dir_needs_close = smb2_dir_needs_close,
5592 .fallocate = smb3_fallocate,
5593 .enum_snapshots = smb3_enum_snapshots,
5594 .notify = smb3_notify,
5595 .init_transform_rq = smb3_init_transform_rq,
5596 .is_transform_hdr = smb3_is_transform_hdr,
5597 .receive_transform = smb3_receive_transform,
5598 .get_dfs_refer = smb2_get_dfs_refer,
5599 .select_sectype = smb2_select_sectype,
5600 #ifdef CONFIG_CIFS_XATTR
5601 .query_all_EAs = smb2_query_eas,
5602 .set_EA = smb2_set_ea,
5603 #endif /* CIFS_XATTR */
5604 .get_acl = get_smb2_acl,
5605 .get_acl_by_fid = get_smb2_acl_by_fid,
5606 .set_acl = set_smb2_acl,
5607 .next_header = smb2_next_header,
5608 .ioctl_query_info = smb2_ioctl_query_info,
5609 .make_node = smb2_make_node,
5610 .fiemap = smb3_fiemap,
5611 .llseek = smb3_llseek,
5612 .is_status_io_timeout = smb2_is_status_io_timeout,
5613 .is_network_name_deleted = smb2_is_network_name_deleted,
5614 };
5615
5616 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5617 struct smb_version_values smb20_values = {
5618 .version_string = SMB20_VERSION_STRING,
5619 .protocol_id = SMB20_PROT_ID,
5620 .req_capabilities = 0, /* MBZ */
5621 .large_lock_type = 0,
5622 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5623 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5624 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5625 .header_size = sizeof(struct smb2_hdr),
5626 .header_preamble_size = 0,
5627 .max_header_size = MAX_SMB2_HDR_SIZE,
5628 .read_rsp_size = sizeof(struct smb2_read_rsp),
5629 .lock_cmd = SMB2_LOCK,
5630 .cap_unix = 0,
5631 .cap_nt_find = SMB2_NT_FIND,
5632 .cap_large_files = SMB2_LARGE_FILES,
5633 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5634 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5635 .create_lease_size = sizeof(struct create_lease),
5636 };
5637 #endif /* ALLOW_INSECURE_LEGACY */
5638
5639 struct smb_version_values smb21_values = {
5640 .version_string = SMB21_VERSION_STRING,
5641 .protocol_id = SMB21_PROT_ID,
5642 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5643 .large_lock_type = 0,
5644 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5645 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5646 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5647 .header_size = sizeof(struct smb2_hdr),
5648 .header_preamble_size = 0,
5649 .max_header_size = MAX_SMB2_HDR_SIZE,
5650 .read_rsp_size = sizeof(struct smb2_read_rsp),
5651 .lock_cmd = SMB2_LOCK,
5652 .cap_unix = 0,
5653 .cap_nt_find = SMB2_NT_FIND,
5654 .cap_large_files = SMB2_LARGE_FILES,
5655 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5656 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5657 .create_lease_size = sizeof(struct create_lease),
5658 };
5659
5660 struct smb_version_values smb3any_values = {
5661 .version_string = SMB3ANY_VERSION_STRING,
5662 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5663 .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,
5664 .large_lock_type = 0,
5665 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5666 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5667 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5668 .header_size = sizeof(struct smb2_hdr),
5669 .header_preamble_size = 0,
5670 .max_header_size = MAX_SMB2_HDR_SIZE,
5671 .read_rsp_size = sizeof(struct smb2_read_rsp),
5672 .lock_cmd = SMB2_LOCK,
5673 .cap_unix = 0,
5674 .cap_nt_find = SMB2_NT_FIND,
5675 .cap_large_files = SMB2_LARGE_FILES,
5676 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5677 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5678 .create_lease_size = sizeof(struct create_lease_v2),
5679 };
5680
5681 struct smb_version_values smbdefault_values = {
5682 .version_string = SMBDEFAULT_VERSION_STRING,
5683 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5684 .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,
5685 .large_lock_type = 0,
5686 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5687 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5688 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5689 .header_size = sizeof(struct smb2_hdr),
5690 .header_preamble_size = 0,
5691 .max_header_size = MAX_SMB2_HDR_SIZE,
5692 .read_rsp_size = sizeof(struct smb2_read_rsp),
5693 .lock_cmd = SMB2_LOCK,
5694 .cap_unix = 0,
5695 .cap_nt_find = SMB2_NT_FIND,
5696 .cap_large_files = SMB2_LARGE_FILES,
5697 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5698 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5699 .create_lease_size = sizeof(struct create_lease_v2),
5700 };
5701
5702 struct smb_version_values smb30_values = {
5703 .version_string = SMB30_VERSION_STRING,
5704 .protocol_id = SMB30_PROT_ID,
5705 .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,
5706 .large_lock_type = 0,
5707 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5708 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5709 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5710 .header_size = sizeof(struct smb2_hdr),
5711 .header_preamble_size = 0,
5712 .max_header_size = MAX_SMB2_HDR_SIZE,
5713 .read_rsp_size = sizeof(struct smb2_read_rsp),
5714 .lock_cmd = SMB2_LOCK,
5715 .cap_unix = 0,
5716 .cap_nt_find = SMB2_NT_FIND,
5717 .cap_large_files = SMB2_LARGE_FILES,
5718 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5719 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5720 .create_lease_size = sizeof(struct create_lease_v2),
5721 };
5722
5723 struct smb_version_values smb302_values = {
5724 .version_string = SMB302_VERSION_STRING,
5725 .protocol_id = SMB302_PROT_ID,
5726 .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,
5727 .large_lock_type = 0,
5728 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5729 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5730 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5731 .header_size = sizeof(struct smb2_hdr),
5732 .header_preamble_size = 0,
5733 .max_header_size = MAX_SMB2_HDR_SIZE,
5734 .read_rsp_size = sizeof(struct smb2_read_rsp),
5735 .lock_cmd = SMB2_LOCK,
5736 .cap_unix = 0,
5737 .cap_nt_find = SMB2_NT_FIND,
5738 .cap_large_files = SMB2_LARGE_FILES,
5739 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5740 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5741 .create_lease_size = sizeof(struct create_lease_v2),
5742 };
5743
5744 struct smb_version_values smb311_values = {
5745 .version_string = SMB311_VERSION_STRING,
5746 .protocol_id = SMB311_PROT_ID,
5747 .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,
5748 .large_lock_type = 0,
5749 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5750 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5751 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5752 .header_size = sizeof(struct smb2_hdr),
5753 .header_preamble_size = 0,
5754 .max_header_size = MAX_SMB2_HDR_SIZE,
5755 .read_rsp_size = sizeof(struct smb2_read_rsp),
5756 .lock_cmd = SMB2_LOCK,
5757 .cap_unix = 0,
5758 .cap_nt_find = SMB2_NT_FIND,
5759 .cap_large_files = SMB2_LARGE_FILES,
5760 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5761 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5762 .create_lease_size = sizeof(struct create_lease_v2),
5763 };
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