1 // SPDX-License-Identifier: GPL-2.0
3 * SMB2 version specific operations
5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
8 #include <linux/pagemap.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>
20 #include "smb2proto.h"
21 #include "cifsproto.h"
22 #include "cifs_debug.h"
23 #include "cifs_unicode.h"
24 #include "smb2status.h"
26 #include "cifs_ioctl.h"
27 #include "smbdirect.h"
29 #include "fs_context.h"
30 #include "cached_dir.h"
32 /* Change credits for different ops and return the total number of credits */
34 change_conf(struct TCP_Server_Info
*server
)
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
) {
44 server
->echoes
= false;
45 server
->oplocks
= false;
48 server
->echoes
= true;
49 server
->oplocks
= false;
50 server
->echo_credits
= 1;
53 server
->echoes
= true;
55 server
->oplocks
= true;
56 server
->oplock_credits
= 1;
58 server
->oplocks
= false;
60 server
->echo_credits
= 1;
62 server
->credits
-= server
->echo_credits
+ server
->oplock_credits
;
63 return server
->credits
+ server
->echo_credits
+ server
->oplock_credits
;
67 smb2_add_credits(struct TCP_Server_Info
*server
,
68 const struct cifs_credits
*credits
, const int optype
)
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;
77 spin_lock(&server
->req_lock
);
78 val
= server
->ops
->get_credits_field(server
, optype
);
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;
84 if ((instance
== 0) || (instance
== server
->reconnect_instance
))
87 reconnect_detected
= true;
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
);
96 WARN_ON_ONCE(server
->in_flight
== 0);
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
);
103 * Sometimes server returns 0 credits on oplock break ack - we need to
104 * rebalance credits in this case.
106 else if (server
->in_flight
> 0 && server
->oplock_credits
== 0 &&
108 if (server
->credits
> 1) {
110 server
->oplock_credits
++;
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 */
118 in_flight
= server
->in_flight
;
119 spin_unlock(&server
->req_lock
);
120 wake_up(&server
->request_q
);
122 if (reconnect_detected
) {
123 trace_smb3_reconnect_detected(server
->CurrentMid
,
124 server
->conn_id
, server
->hostname
, scredits
, add
, in_flight
);
126 cifs_dbg(FYI
, "trying to put %d credits from the old server instance %d\n",
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
);
137 spin_lock(&server
->srv_lock
);
138 if (server
->tcpStatus
== CifsNeedReconnect
139 || server
->tcpStatus
== CifsExiting
) {
140 spin_unlock(&server
->srv_lock
);
143 spin_unlock(&server
->srv_lock
);
147 /* change_conf hasn't been executed */
150 cifs_server_dbg(VFS
, "Possible client or server bug - zero credits\n");
153 cifs_server_dbg(VFS
, "disabling echoes and oplocks\n");
156 cifs_dbg(FYI
, "disabling oplocks\n");
159 /* change_conf rebalanced credits for different types */
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
);
169 smb2_set_credits(struct TCP_Server_Info
*server
, const int val
)
171 int scredits
, in_flight
;
173 spin_lock(&server
->req_lock
);
174 server
->credits
= val
;
176 server
->reconnect_instance
++;
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
181 if (SERVER_IS_CHAN(server
))
182 server
->primary_server
->channel_sequence_num
++;
184 server
->channel_sequence_num
++;
186 scredits
= server
->credits
;
187 in_flight
= server
->in_flight
;
188 spin_unlock(&server
->req_lock
);
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
);
194 /* don't log while holding the lock */
196 cifs_dbg(FYI
, "set credits to 1 due to smb2 reconnect\n");
200 smb2_get_credits_field(struct TCP_Server_Info
*server
, const int optype
)
204 return &server
->echo_credits
;
206 return &server
->oplock_credits
;
208 return &server
->credits
;
213 smb2_get_credits(struct mid_q_entry
*mid
)
215 return mid
->credits_received
;
219 smb2_wait_mtu_credits(struct TCP_Server_Info
*server
, unsigned int size
,
220 unsigned int *num
, struct cifs_credits
*credits
)
223 unsigned int scredits
, in_flight
;
225 spin_lock(&server
->req_lock
);
227 spin_unlock(&server
->req_lock
);
229 spin_lock(&server
->srv_lock
);
230 if (server
->tcpStatus
== CifsExiting
) {
231 spin_unlock(&server
->srv_lock
);
234 spin_unlock(&server
->srv_lock
);
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
);
245 spin_lock(&server
->req_lock
);
247 scredits
= server
->credits
;
248 /* can deadlock with reopen */
250 *num
= SMB2_MAX_BUFFER_SIZE
;
252 credits
->instance
= 0;
256 /* leave some credits for reopen and other ops */
258 *num
= min_t(unsigned int, size
,
259 scredits
* SMB2_MAX_BUFFER_SIZE
);
262 DIV_ROUND_UP(*num
, SMB2_MAX_BUFFER_SIZE
);
263 credits
->instance
= server
->reconnect_instance
;
264 server
->credits
-= credits
->value
;
266 if (server
->in_flight
> server
->max_in_flight
)
267 server
->max_in_flight
= server
->in_flight
;
271 scredits
= server
->credits
;
272 in_flight
= server
->in_flight
;
273 spin_unlock(&server
->req_lock
);
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
);
284 smb2_adjust_credits(struct TCP_Server_Info
*server
,
285 struct cifs_credits
*credits
,
286 const unsigned int payload_size
)
288 int new_val
= DIV_ROUND_UP(payload_size
, SMB2_MAX_BUFFER_SIZE
);
289 int scredits
, in_flight
;
291 if (!credits
->value
|| credits
->value
== new_val
)
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
);
303 spin_lock(&server
->req_lock
);
305 if (server
->reconnect_instance
!= credits
->instance
) {
306 scredits
= server
->credits
;
307 in_flight
= server
->in_flight
;
308 spin_unlock(&server
->req_lock
);
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
);
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
);
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
);
330 credits
->value
= new_val
;
336 smb2_get_next_mid(struct TCP_Server_Info
*server
)
339 /* for SMB2 we need the current value */
340 spin_lock(&server
->mid_lock
);
341 mid
= server
->CurrentMid
++;
342 spin_unlock(&server
->mid_lock
);
347 smb2_revert_current_mid(struct TCP_Server_Info
*server
, const unsigned int val
)
349 spin_lock(&server
->mid_lock
);
350 if (server
->CurrentMid
>= val
)
351 server
->CurrentMid
-= val
;
352 spin_unlock(&server
->mid_lock
);
355 static struct mid_q_entry
*
356 __smb2_find_mid(struct TCP_Server_Info
*server
, char *buf
, bool dequeue
)
358 struct mid_q_entry
*mid
;
359 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
360 __u64 wire_mid
= le64_to_cpu(shdr
->MessageId
);
362 if (shdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
) {
363 cifs_server_dbg(VFS
, "Encrypted frame parsing not supported yet\n");
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
);
374 list_del_init(&mid
->qhead
);
375 mid
->mid_flags
|= MID_DELETED
;
377 spin_unlock(&server
->mid_lock
);
381 spin_unlock(&server
->mid_lock
);
385 static struct mid_q_entry
*
386 smb2_find_mid(struct TCP_Server_Info
*server
, char *buf
)
388 return __smb2_find_mid(server
, buf
, false);
391 static struct mid_q_entry
*
392 smb2_find_dequeue_mid(struct TCP_Server_Info
*server
, char *buf
)
394 return __smb2_find_mid(server
, buf
, true);
398 smb2_dump_detail(void *buf
, struct TCP_Server_Info
*server
)
400 #ifdef CONFIG_CIFS_DEBUG2
401 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
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
));
414 smb2_need_neg(struct TCP_Server_Info
*server
)
416 return server
->max_read
== 0;
420 smb2_negotiate(const unsigned int xid
,
421 struct cifs_ses
*ses
,
422 struct TCP_Server_Info
*server
)
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 */
437 smb2_negotiate_wsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
439 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
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
);
452 smb3_negotiate_wsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
454 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
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
464 * Account for SMB2 data transfer packet header and
465 * possible encryption header
467 wsize
= min_t(unsigned int,
469 server
->smbd_conn
->max_fragmented_send_size
-
470 SMB2_READWRITE_PDU_HEADER_SIZE
-
471 sizeof(struct smb2_transform_hdr
));
473 wsize
= min_t(unsigned int,
474 wsize
, server
->smbd_conn
->max_readwrite_size
);
477 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
478 wsize
= min_t(unsigned int, wsize
, SMB2_MAX_BUFFER_SIZE
);
484 smb2_negotiate_rsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
486 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
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
);
493 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
494 rsize
= min_t(unsigned int, rsize
, SMB2_MAX_BUFFER_SIZE
);
500 smb3_negotiate_rsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
502 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
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
512 * Account for SMB2 data transfer packet header and
513 * possible encryption header
515 rsize
= min_t(unsigned int,
517 server
->smbd_conn
->max_fragmented_recv_size
-
518 SMB2_READWRITE_PDU_HEADER_SIZE
-
519 sizeof(struct smb2_transform_hdr
));
521 rsize
= min_t(unsigned int,
522 rsize
, server
->smbd_conn
->max_readwrite_size
);
526 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
527 rsize
= min_t(unsigned int, rsize
, SMB2_MAX_BUFFER_SIZE
);
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.
539 iface_cmp(struct cifs_server_iface
*a
, struct cifs_server_iface
*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
);
551 else if (cmp_ret
> 0)
555 } else if (a
->speed
> b
->speed
)
559 } else if (a
->rss_capable
> b
->rss_capable
)
563 } else if (a
->rdma_capable
> b
->rdma_capable
)
570 parse_server_interfaces(struct network_interface_info_ioctl_rsp
*buf
,
571 size_t buf_len
, struct cifs_ses
*ses
, bool in_mount
)
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
;
585 bytes_left
= buf_len
;
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
);
598 * Go through iface_list and do kref_put to remove
599 * any unused ifaces. ifaces in use will be removed
600 * when the last user calls a kref_put on it
602 list_for_each_entry_safe(iface
, niface
, &ses
->iface_list
,
604 iface
->is_active
= 0;
605 kref_put(&iface
->refcount
, release_iface
);
608 spin_unlock(&ses
->iface_lock
);
611 * Samba server e.g. can return an empty interface list in some cases,
612 * which would only be a problem if we were requesting multichannel
614 if (bytes_left
== 0) {
615 /* avoid spamming logs every 10 minutes, so log only in mount */
616 if ((ses
->chan_max
> 1) && in_mount
)
618 "multichannel not available\n"
619 "Empty network interface list returned by server %s\n",
620 ses
->server
->hostname
);
625 while (bytes_left
>= sizeof(*p
)) {
626 memset(&tmp_iface
, 0, sizeof(tmp_iface
));
627 tmp_iface
.speed
= le64_to_cpu(p
->LinkSpeed
);
628 tmp_iface
.rdma_capable
= le32_to_cpu(p
->Capability
& RDMA_CAPABLE
) ? 1 : 0;
629 tmp_iface
.rss_capable
= le32_to_cpu(p
->Capability
& RSS_CAPABLE
) ? 1 : 0;
633 * The kernel and wire socket structures have the same
634 * layout and use network byte order but make the
635 * conversion explicit in case either one changes.
638 addr4
= (struct sockaddr_in
*)&tmp_iface
.sockaddr
;
639 p4
= (struct iface_info_ipv4
*)p
->Buffer
;
640 addr4
->sin_family
= AF_INET
;
641 memcpy(&addr4
->sin_addr
, &p4
->IPv4Address
, 4);
643 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
644 addr4
->sin_port
= cpu_to_be16(CIFS_PORT
);
646 cifs_dbg(FYI
, "%s: ipv4 %pI4\n", __func__
,
650 addr6
= (struct sockaddr_in6
*)&tmp_iface
.sockaddr
;
651 p6
= (struct iface_info_ipv6
*)p
->Buffer
;
652 addr6
->sin6_family
= AF_INET6
;
653 memcpy(&addr6
->sin6_addr
, &p6
->IPv6Address
, 16);
655 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
656 addr6
->sin6_flowinfo
= 0;
657 addr6
->sin6_scope_id
= 0;
658 addr6
->sin6_port
= cpu_to_be16(CIFS_PORT
);
660 cifs_dbg(FYI
, "%s: ipv6 %pI6\n", __func__
,
665 "%s: skipping unsupported socket family\n",
671 * The iface_list is assumed to be sorted by speed.
672 * Check if the new interface exists in that list.
673 * NEVER change iface. it could be in use.
674 * Add a new one instead
676 spin_lock(&ses
->iface_lock
);
677 list_for_each_entry_safe(iface
, niface
, &ses
->iface_list
,
679 ret
= iface_cmp(iface
, &tmp_iface
);
681 /* just get a ref so that it doesn't get picked/freed */
682 iface
->is_active
= 1;
683 kref_get(&iface
->refcount
);
685 spin_unlock(&ses
->iface_lock
);
687 } else if (ret
< 0) {
688 /* all remaining ifaces are slower */
689 kref_get(&iface
->refcount
);
693 spin_unlock(&ses
->iface_lock
);
695 /* no match. insert the entry in the list */
696 info
= kmalloc(sizeof(struct cifs_server_iface
),
702 memcpy(info
, &tmp_iface
, sizeof(tmp_iface
));
704 /* add this new entry to the list */
705 kref_init(&info
->refcount
);
708 cifs_dbg(FYI
, "%s: adding iface %zu\n", __func__
, ses
->iface_count
);
709 cifs_dbg(FYI
, "%s: speed %zu bps\n", __func__
, info
->speed
);
710 cifs_dbg(FYI
, "%s: capabilities 0x%08x\n", __func__
,
711 le32_to_cpu(p
->Capability
));
713 spin_lock(&ses
->iface_lock
);
714 if (!list_entry_is_head(iface
, &ses
->iface_list
, iface_head
)) {
715 list_add_tail(&info
->iface_head
, &iface
->iface_head
);
716 kref_put(&iface
->refcount
, release_iface
);
718 list_add_tail(&info
->iface_head
, &ses
->iface_list
);
721 spin_unlock(&ses
->iface_lock
);
722 ses
->iface_last_update
= jiffies
;
725 next
= le32_to_cpu(p
->Next
);
727 bytes_left
-= sizeof(*p
);
730 p
= (struct network_interface_info_ioctl_rsp
*)((u8
*)p
+next
);
735 cifs_dbg(VFS
, "%s: malformed interface info\n", __func__
);
740 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
741 if ((bytes_left
> 8) || p
->Next
)
742 cifs_dbg(VFS
, "%s: incomplete interface info\n", __func__
);
745 if (!ses
->iface_count
) {
755 SMB3_request_interfaces(const unsigned int xid
, struct cifs_tcon
*tcon
, bool in_mount
)
758 unsigned int ret_data_len
= 0;
759 struct network_interface_info_ioctl_rsp
*out_buf
= NULL
;
760 struct cifs_ses
*ses
= tcon
->ses
;
761 struct TCP_Server_Info
*pserver
;
763 /* do not query too frequently */
764 if (ses
->iface_last_update
&&
765 time_before(jiffies
, ses
->iface_last_update
+
766 (SMB_INTERFACE_POLL_INTERVAL
* HZ
)))
769 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
770 FSCTL_QUERY_NETWORK_INTERFACE_INFO
,
771 NULL
/* no data input */, 0 /* no data input */,
772 CIFSMaxBufSize
, (char **)&out_buf
, &ret_data_len
);
773 if (rc
== -EOPNOTSUPP
) {
775 "server does not support query network interfaces\n");
777 } else if (rc
!= 0) {
778 cifs_tcon_dbg(VFS
, "error %d on ioctl to get interface list\n", rc
);
782 rc
= parse_server_interfaces(out_buf
, ret_data_len
, ses
, in_mount
);
786 /* check if iface is still active */
787 pserver
= ses
->chans
[0].server
;
788 if (pserver
&& !cifs_chan_is_iface_active(ses
, pserver
))
789 cifs_chan_update_iface(ses
, pserver
);
797 smb3_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
,
798 struct cifs_sb_info
*cifs_sb
)
801 __le16 srch_path
= 0; /* Null - open root of share */
802 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
803 struct cifs_open_parms oparms
;
805 struct cached_fid
*cfid
= NULL
;
807 oparms
= (struct cifs_open_parms
) {
810 .desired_access
= FILE_READ_ATTRIBUTES
,
811 .disposition
= FILE_OPEN
,
812 .create_options
= cifs_create_options(cifs_sb
, 0),
816 rc
= open_cached_dir(xid
, tcon
, "", cifs_sb
, false, &cfid
);
818 memcpy(&fid
, &cfid
->fid
, sizeof(struct cifs_fid
));
820 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
,
825 SMB3_request_interfaces(xid
, tcon
, true /* called during mount */);
827 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
828 FS_ATTRIBUTE_INFORMATION
);
829 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
830 FS_DEVICE_INFORMATION
);
831 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
832 FS_VOLUME_INFORMATION
);
833 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
834 FS_SECTOR_SIZE_INFORMATION
); /* SMB3 specific */
836 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
838 close_cached_dir(cfid
);
842 smb2_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
,
843 struct cifs_sb_info
*cifs_sb
)
846 __le16 srch_path
= 0; /* Null - open root of share */
847 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
848 struct cifs_open_parms oparms
;
851 oparms
= (struct cifs_open_parms
) {
854 .desired_access
= FILE_READ_ATTRIBUTES
,
855 .disposition
= FILE_OPEN
,
856 .create_options
= cifs_create_options(cifs_sb
, 0),
860 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
,
865 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
866 FS_ATTRIBUTE_INFORMATION
);
867 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
868 FS_DEVICE_INFORMATION
);
869 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
873 smb2_is_path_accessible(const unsigned int xid
, struct cifs_tcon
*tcon
,
874 struct cifs_sb_info
*cifs_sb
, const char *full_path
)
877 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
878 int err_buftype
= CIFS_NO_BUFFER
;
879 struct cifs_open_parms oparms
;
880 struct kvec err_iov
= {};
882 struct cached_fid
*cfid
;
886 rc
= open_cached_dir(xid
, tcon
, full_path
, cifs_sb
, true, &cfid
);
888 if (cfid
->has_lease
) {
889 close_cached_dir(cfid
);
892 close_cached_dir(cfid
);
895 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
899 oparms
= (struct cifs_open_parms
) {
902 .desired_access
= FILE_READ_ATTRIBUTES
,
903 .disposition
= FILE_OPEN
,
904 .create_options
= cifs_create_options(cifs_sb
, 0),
908 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
,
909 &err_iov
, &err_buftype
);
911 struct smb2_hdr
*hdr
= err_iov
.iov_base
;
913 if (unlikely(!hdr
|| err_buftype
== CIFS_NO_BUFFER
))
916 if (rc
!= -EREMOTE
&& hdr
->Status
== STATUS_OBJECT_NAME_INVALID
) {
917 rc2
= cifs_inval_name_dfs_link_error(xid
, tcon
, cifs_sb
,
926 if (rc
== -EREMOTE
&& IS_ENABLED(CONFIG_CIFS_DFS_UPCALL
) && cifs_sb
&&
927 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_DFS
))
932 rc
= SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
935 free_rsp_buf(err_buftype
, err_iov
.iov_base
);
940 static int smb2_get_srv_inum(const unsigned int xid
, struct cifs_tcon
*tcon
,
941 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
942 u64
*uniqueid
, struct cifs_open_info_data
*data
)
944 *uniqueid
= le64_to_cpu(data
->fi
.IndexNumber
);
948 static int smb2_query_file_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
949 struct cifsFileInfo
*cfile
, struct cifs_open_info_data
*data
)
951 struct cifs_fid
*fid
= &cfile
->fid
;
953 if (cfile
->symlink_target
) {
954 data
->symlink_target
= kstrdup(cfile
->symlink_target
, GFP_KERNEL
);
955 if (!data
->symlink_target
)
958 return SMB2_query_info(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
, &data
->fi
);
961 #ifdef CONFIG_CIFS_XATTR
963 move_smb2_ea_to_cifs(char *dst
, size_t dst_size
,
964 struct smb2_file_full_ea_info
*src
, size_t src_size
,
965 const unsigned char *ea_name
)
968 unsigned int ea_name_len
= ea_name
? strlen(ea_name
) : 0;
970 size_t buf_size
= dst_size
;
971 size_t name_len
, value_len
, user_name_len
;
973 while (src_size
> 0) {
974 name_len
= (size_t)src
->ea_name_length
;
975 value_len
= (size_t)le16_to_cpu(src
->ea_value_length
);
980 if (src_size
< 8 + name_len
+ 1 + value_len
) {
981 cifs_dbg(FYI
, "EA entry goes beyond length of list\n");
986 name
= &src
->ea_data
[0];
987 value
= &src
->ea_data
[src
->ea_name_length
+ 1];
990 if (ea_name_len
== name_len
&&
991 memcmp(ea_name
, name
, name_len
) == 0) {
995 if (dst_size
< value_len
) {
999 memcpy(dst
, value
, value_len
);
1003 /* 'user.' plus a terminating null */
1004 user_name_len
= 5 + 1 + name_len
;
1006 if (buf_size
== 0) {
1007 /* skip copy - calc size only */
1008 rc
+= user_name_len
;
1009 } else if (dst_size
>= user_name_len
) {
1010 dst_size
-= user_name_len
;
1011 memcpy(dst
, "user.", 5);
1013 memcpy(dst
, src
->ea_data
, name_len
);
1017 rc
+= user_name_len
;
1019 /* stop before overrun buffer */
1025 if (!src
->next_entry_offset
)
1028 if (src_size
< le32_to_cpu(src
->next_entry_offset
)) {
1029 /* stop before overrun buffer */
1033 src_size
-= le32_to_cpu(src
->next_entry_offset
);
1034 src
= (void *)((char *)src
+
1035 le32_to_cpu(src
->next_entry_offset
));
1038 /* didn't find the named attribute */
1047 smb2_query_eas(const unsigned int xid
, struct cifs_tcon
*tcon
,
1048 const unsigned char *path
, const unsigned char *ea_name
,
1049 char *ea_data
, size_t buf_size
,
1050 struct cifs_sb_info
*cifs_sb
)
1053 struct kvec rsp_iov
= {NULL
, 0};
1054 int buftype
= CIFS_NO_BUFFER
;
1055 struct smb2_query_info_rsp
*rsp
;
1056 struct smb2_file_full_ea_info
*info
= NULL
;
1058 rc
= smb2_query_info_compound(xid
, tcon
, path
,
1060 FILE_FULL_EA_INFORMATION
,
1063 MAX_SMB2_CREATE_RESPONSE_SIZE
-
1064 MAX_SMB2_CLOSE_RESPONSE_SIZE
,
1065 &rsp_iov
, &buftype
, cifs_sb
);
1068 * If ea_name is NULL (listxattr) and there are no EAs,
1069 * return 0 as it's not an error. Otherwise, the specified
1070 * ea_name was not found.
1072 if (!ea_name
&& rc
== -ENODATA
)
1077 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
1078 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
1079 le32_to_cpu(rsp
->OutputBufferLength
),
1081 sizeof(struct smb2_file_full_ea_info
));
1085 info
= (struct smb2_file_full_ea_info
*)(
1086 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
1087 rc
= move_smb2_ea_to_cifs(ea_data
, buf_size
, info
,
1088 le32_to_cpu(rsp
->OutputBufferLength
), ea_name
);
1091 free_rsp_buf(buftype
, rsp_iov
.iov_base
);
1096 smb2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
1097 const char *path
, const char *ea_name
, const void *ea_value
,
1098 const __u16 ea_value_len
, const struct nls_table
*nls_codepage
,
1099 struct cifs_sb_info
*cifs_sb
)
1101 struct smb2_compound_vars
*vars
;
1102 struct cifs_ses
*ses
= tcon
->ses
;
1103 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
1104 struct smb_rqst
*rqst
;
1105 struct kvec
*rsp_iov
;
1106 __le16
*utf16_path
= NULL
;
1107 int ea_name_len
= strlen(ea_name
);
1108 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
1110 int resp_buftype
[3];
1111 struct cifs_open_parms oparms
;
1112 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1113 struct cifs_fid fid
;
1114 unsigned int size
[1];
1116 struct smb2_file_full_ea_info
*ea
= NULL
;
1117 struct smb2_query_info_rsp
*rsp
;
1118 int rc
, used_len
= 0;
1120 if (smb3_encryption_required(tcon
))
1121 flags
|= CIFS_TRANSFORM_REQ
;
1123 if (ea_name_len
> 255)
1126 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
1130 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
1131 vars
= kzalloc(sizeof(*vars
), GFP_KERNEL
);
1137 rsp_iov
= vars
->rsp_iov
;
1139 if (ses
->server
->ops
->query_all_EAs
) {
1141 rc
= ses
->server
->ops
->query_all_EAs(xid
, tcon
, path
,
1147 /* If we are adding a attribute we should first check
1148 * if there will be enough space available to store
1149 * the new EA. If not we should not add it since we
1150 * would not be able to even read the EAs back.
1152 rc
= smb2_query_info_compound(xid
, tcon
, path
,
1154 FILE_FULL_EA_INFORMATION
,
1157 MAX_SMB2_CREATE_RESPONSE_SIZE
-
1158 MAX_SMB2_CLOSE_RESPONSE_SIZE
,
1159 &rsp_iov
[1], &resp_buftype
[1], cifs_sb
);
1161 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
[1].iov_base
;
1162 used_len
= le32_to_cpu(rsp
->OutputBufferLength
);
1164 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
1165 resp_buftype
[1] = CIFS_NO_BUFFER
;
1166 memset(&rsp_iov
[1], 0, sizeof(rsp_iov
[1]));
1169 /* Use a fudge factor of 256 bytes in case we collide
1170 * with a different set_EAs command.
1172 if (CIFSMaxBufSize
- MAX_SMB2_CREATE_RESPONSE_SIZE
-
1173 MAX_SMB2_CLOSE_RESPONSE_SIZE
- 256 <
1174 used_len
+ ea_name_len
+ ea_value_len
+ 1) {
1182 rqst
[0].rq_iov
= vars
->open_iov
;
1183 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
1185 oparms
= (struct cifs_open_parms
) {
1188 .desired_access
= FILE_WRITE_EA
,
1189 .disposition
= FILE_OPEN
,
1190 .create_options
= cifs_create_options(cifs_sb
, 0),
1194 rc
= SMB2_open_init(tcon
, server
,
1195 &rqst
[0], &oplock
, &oparms
, utf16_path
);
1198 smb2_set_next_command(tcon
, &rqst
[0]);
1202 rqst
[1].rq_iov
= vars
->si_iov
;
1203 rqst
[1].rq_nvec
= 1;
1205 len
= sizeof(*ea
) + ea_name_len
+ ea_value_len
+ 1;
1206 ea
= kzalloc(len
, GFP_KERNEL
);
1212 ea
->ea_name_length
= ea_name_len
;
1213 ea
->ea_value_length
= cpu_to_le16(ea_value_len
);
1214 memcpy(ea
->ea_data
, ea_name
, ea_name_len
+ 1);
1215 memcpy(ea
->ea_data
+ ea_name_len
+ 1, ea_value
, ea_value_len
);
1220 rc
= SMB2_set_info_init(tcon
, server
,
1221 &rqst
[1], COMPOUND_FID
,
1222 COMPOUND_FID
, current
->tgid
,
1223 FILE_FULL_EA_INFORMATION
,
1224 SMB2_O_INFO_FILE
, 0, data
, size
);
1227 smb2_set_next_command(tcon
, &rqst
[1]);
1228 smb2_set_related(&rqst
[1]);
1231 rqst
[2].rq_iov
= &vars
->close_iov
;
1232 rqst
[2].rq_nvec
= 1;
1233 rc
= SMB2_close_init(tcon
, server
,
1234 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
1237 smb2_set_related(&rqst
[2]);
1239 rc
= compound_send_recv(xid
, ses
, server
,
1241 resp_buftype
, rsp_iov
);
1242 /* no need to bump num_remote_opens because handle immediately closed */
1246 SMB2_open_free(&rqst
[0]);
1247 SMB2_set_info_free(&rqst
[1]);
1248 SMB2_close_free(&rqst
[2]);
1249 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
1250 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
1251 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
1260 smb2_can_echo(struct TCP_Server_Info
*server
)
1262 return server
->echoes
;
1266 smb2_clear_stats(struct cifs_tcon
*tcon
)
1270 for (i
= 0; i
< NUMBER_OF_SMB2_COMMANDS
; i
++) {
1271 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_sent
[i
], 0);
1272 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_failed
[i
], 0);
1277 smb2_dump_share_caps(struct seq_file
*m
, struct cifs_tcon
*tcon
)
1279 seq_puts(m
, "\n\tShare Capabilities:");
1280 if (tcon
->capabilities
& SMB2_SHARE_CAP_DFS
)
1281 seq_puts(m
, " DFS,");
1282 if (tcon
->capabilities
& SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
)
1283 seq_puts(m
, " CONTINUOUS AVAILABILITY,");
1284 if (tcon
->capabilities
& SMB2_SHARE_CAP_SCALEOUT
)
1285 seq_puts(m
, " SCALEOUT,");
1286 if (tcon
->capabilities
& SMB2_SHARE_CAP_CLUSTER
)
1287 seq_puts(m
, " CLUSTER,");
1288 if (tcon
->capabilities
& SMB2_SHARE_CAP_ASYMMETRIC
)
1289 seq_puts(m
, " ASYMMETRIC,");
1290 if (tcon
->capabilities
== 0)
1291 seq_puts(m
, " None");
1292 if (tcon
->ss_flags
& SSINFO_FLAGS_ALIGNED_DEVICE
)
1293 seq_puts(m
, " Aligned,");
1294 if (tcon
->ss_flags
& SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE
)
1295 seq_puts(m
, " Partition Aligned,");
1296 if (tcon
->ss_flags
& SSINFO_FLAGS_NO_SEEK_PENALTY
)
1297 seq_puts(m
, " SSD,");
1298 if (tcon
->ss_flags
& SSINFO_FLAGS_TRIM_ENABLED
)
1299 seq_puts(m
, " TRIM-support,");
1301 seq_printf(m
, "\tShare Flags: 0x%x", tcon
->share_flags
);
1302 seq_printf(m
, "\n\ttid: 0x%x", tcon
->tid
);
1303 if (tcon
->perf_sector_size
)
1304 seq_printf(m
, "\tOptimal sector size: 0x%x",
1305 tcon
->perf_sector_size
);
1306 seq_printf(m
, "\tMaximal Access: 0x%x", tcon
->maximal_access
);
1310 smb2_print_stats(struct seq_file
*m
, struct cifs_tcon
*tcon
)
1312 atomic_t
*sent
= tcon
->stats
.smb2_stats
.smb2_com_sent
;
1313 atomic_t
*failed
= tcon
->stats
.smb2_stats
.smb2_com_failed
;
1316 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1317 * totals (requests sent) since those SMBs are per-session not per tcon
1319 seq_printf(m
, "\nBytes read: %llu Bytes written: %llu",
1320 (long long)(tcon
->bytes_read
),
1321 (long long)(tcon
->bytes_written
));
1322 seq_printf(m
, "\nOpen files: %d total (local), %d open on server",
1323 atomic_read(&tcon
->num_local_opens
),
1324 atomic_read(&tcon
->num_remote_opens
));
1325 seq_printf(m
, "\nTreeConnects: %d total %d failed",
1326 atomic_read(&sent
[SMB2_TREE_CONNECT_HE
]),
1327 atomic_read(&failed
[SMB2_TREE_CONNECT_HE
]));
1328 seq_printf(m
, "\nTreeDisconnects: %d total %d failed",
1329 atomic_read(&sent
[SMB2_TREE_DISCONNECT_HE
]),
1330 atomic_read(&failed
[SMB2_TREE_DISCONNECT_HE
]));
1331 seq_printf(m
, "\nCreates: %d total %d failed",
1332 atomic_read(&sent
[SMB2_CREATE_HE
]),
1333 atomic_read(&failed
[SMB2_CREATE_HE
]));
1334 seq_printf(m
, "\nCloses: %d total %d failed",
1335 atomic_read(&sent
[SMB2_CLOSE_HE
]),
1336 atomic_read(&failed
[SMB2_CLOSE_HE
]));
1337 seq_printf(m
, "\nFlushes: %d total %d failed",
1338 atomic_read(&sent
[SMB2_FLUSH_HE
]),
1339 atomic_read(&failed
[SMB2_FLUSH_HE
]));
1340 seq_printf(m
, "\nReads: %d total %d failed",
1341 atomic_read(&sent
[SMB2_READ_HE
]),
1342 atomic_read(&failed
[SMB2_READ_HE
]));
1343 seq_printf(m
, "\nWrites: %d total %d failed",
1344 atomic_read(&sent
[SMB2_WRITE_HE
]),
1345 atomic_read(&failed
[SMB2_WRITE_HE
]));
1346 seq_printf(m
, "\nLocks: %d total %d failed",
1347 atomic_read(&sent
[SMB2_LOCK_HE
]),
1348 atomic_read(&failed
[SMB2_LOCK_HE
]));
1349 seq_printf(m
, "\nIOCTLs: %d total %d failed",
1350 atomic_read(&sent
[SMB2_IOCTL_HE
]),
1351 atomic_read(&failed
[SMB2_IOCTL_HE
]));
1352 seq_printf(m
, "\nQueryDirectories: %d total %d failed",
1353 atomic_read(&sent
[SMB2_QUERY_DIRECTORY_HE
]),
1354 atomic_read(&failed
[SMB2_QUERY_DIRECTORY_HE
]));
1355 seq_printf(m
, "\nChangeNotifies: %d total %d failed",
1356 atomic_read(&sent
[SMB2_CHANGE_NOTIFY_HE
]),
1357 atomic_read(&failed
[SMB2_CHANGE_NOTIFY_HE
]));
1358 seq_printf(m
, "\nQueryInfos: %d total %d failed",
1359 atomic_read(&sent
[SMB2_QUERY_INFO_HE
]),
1360 atomic_read(&failed
[SMB2_QUERY_INFO_HE
]));
1361 seq_printf(m
, "\nSetInfos: %d total %d failed",
1362 atomic_read(&sent
[SMB2_SET_INFO_HE
]),
1363 atomic_read(&failed
[SMB2_SET_INFO_HE
]));
1364 seq_printf(m
, "\nOplockBreaks: %d sent %d failed",
1365 atomic_read(&sent
[SMB2_OPLOCK_BREAK_HE
]),
1366 atomic_read(&failed
[SMB2_OPLOCK_BREAK_HE
]));
1370 smb2_set_fid(struct cifsFileInfo
*cfile
, struct cifs_fid
*fid
, __u32 oplock
)
1372 struct cifsInodeInfo
*cinode
= CIFS_I(d_inode(cfile
->dentry
));
1373 struct TCP_Server_Info
*server
= tlink_tcon(cfile
->tlink
)->ses
->server
;
1375 cfile
->fid
.persistent_fid
= fid
->persistent_fid
;
1376 cfile
->fid
.volatile_fid
= fid
->volatile_fid
;
1377 cfile
->fid
.access
= fid
->access
;
1378 #ifdef CONFIG_CIFS_DEBUG2
1379 cfile
->fid
.mid
= fid
->mid
;
1380 #endif /* CIFS_DEBUG2 */
1381 server
->ops
->set_oplock_level(cinode
, oplock
, fid
->epoch
,
1383 cinode
->can_cache_brlcks
= CIFS_CACHE_WRITE(cinode
);
1384 memcpy(cfile
->fid
.create_guid
, fid
->create_guid
, 16);
1388 smb2_close_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
1389 struct cifs_fid
*fid
)
1391 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
1395 smb2_close_getattr(const unsigned int xid
, struct cifs_tcon
*tcon
,
1396 struct cifsFileInfo
*cfile
)
1398 struct smb2_file_network_open_info file_inf
;
1399 struct inode
*inode
;
1402 rc
= __SMB2_close(xid
, tcon
, cfile
->fid
.persistent_fid
,
1403 cfile
->fid
.volatile_fid
, &file_inf
);
1407 inode
= d_inode(cfile
->dentry
);
1409 spin_lock(&inode
->i_lock
);
1410 CIFS_I(inode
)->time
= jiffies
;
1412 /* Creation time should not need to be updated on close */
1413 if (file_inf
.LastWriteTime
)
1414 inode_set_mtime_to_ts(inode
,
1415 cifs_NTtimeToUnix(file_inf
.LastWriteTime
));
1416 if (file_inf
.ChangeTime
)
1417 inode_set_ctime_to_ts(inode
,
1418 cifs_NTtimeToUnix(file_inf
.ChangeTime
));
1419 if (file_inf
.LastAccessTime
)
1420 inode_set_atime_to_ts(inode
,
1421 cifs_NTtimeToUnix(file_inf
.LastAccessTime
));
1424 * i_blocks is not related to (i_size / i_blksize),
1425 * but instead 512 byte (2**9) size is required for
1426 * calculating num blocks.
1428 if (le64_to_cpu(file_inf
.AllocationSize
) > 4096)
1430 (512 - 1 + le64_to_cpu(file_inf
.AllocationSize
)) >> 9;
1432 /* End of file and Attributes should not have to be updated on close */
1433 spin_unlock(&inode
->i_lock
);
1437 SMB2_request_res_key(const unsigned int xid
, struct cifs_tcon
*tcon
,
1438 u64 persistent_fid
, u64 volatile_fid
,
1439 struct copychunk_ioctl
*pcchunk
)
1442 unsigned int ret_data_len
;
1443 struct resume_key_req
*res_key
;
1445 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1446 FSCTL_SRV_REQUEST_RESUME_KEY
, NULL
, 0 /* no input */,
1447 CIFSMaxBufSize
, (char **)&res_key
, &ret_data_len
);
1449 if (rc
== -EOPNOTSUPP
) {
1450 pr_warn_once("Server share %s does not support copy range\n", tcon
->tree_name
);
1451 goto req_res_key_exit
;
1453 cifs_tcon_dbg(VFS
, "refcpy ioctl error %d getting resume key\n", rc
);
1454 goto req_res_key_exit
;
1456 if (ret_data_len
< sizeof(struct resume_key_req
)) {
1457 cifs_tcon_dbg(VFS
, "Invalid refcopy resume key length\n");
1459 goto req_res_key_exit
;
1461 memcpy(pcchunk
->SourceKey
, res_key
->ResumeKey
, COPY_CHUNK_RES_KEY_SIZE
);
1469 smb2_ioctl_query_info(const unsigned int xid
,
1470 struct cifs_tcon
*tcon
,
1471 struct cifs_sb_info
*cifs_sb
,
1472 __le16
*path
, int is_dir
,
1475 struct smb2_compound_vars
*vars
;
1476 struct smb_rqst
*rqst
;
1477 struct kvec
*rsp_iov
;
1478 struct cifs_ses
*ses
= tcon
->ses
;
1479 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
1480 char __user
*arg
= (char __user
*)p
;
1481 struct smb_query_info qi
;
1482 struct smb_query_info __user
*pqi
;
1484 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
1485 struct smb2_query_info_rsp
*qi_rsp
= NULL
;
1486 struct smb2_ioctl_rsp
*io_rsp
= NULL
;
1487 void *buffer
= NULL
;
1488 int resp_buftype
[3];
1489 struct cifs_open_parms oparms
;
1490 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1491 struct cifs_fid fid
;
1492 unsigned int size
[2];
1494 int create_options
= is_dir
? CREATE_NOT_FILE
: CREATE_NOT_DIR
;
1495 void (*free_req1_func
)(struct smb_rqst
*r
);
1497 vars
= kzalloc(sizeof(*vars
), GFP_ATOMIC
);
1500 rqst
= &vars
->rqst
[0];
1501 rsp_iov
= &vars
->rsp_iov
[0];
1503 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
1505 if (copy_from_user(&qi
, arg
, sizeof(struct smb_query_info
))) {
1509 if (qi
.output_buffer_length
> 1024) {
1514 if (!ses
|| !server
) {
1519 if (smb3_encryption_required(tcon
))
1520 flags
|= CIFS_TRANSFORM_REQ
;
1522 if (qi
.output_buffer_length
) {
1523 buffer
= memdup_user(arg
+ sizeof(struct smb_query_info
), qi
.output_buffer_length
);
1524 if (IS_ERR(buffer
)) {
1525 rc
= PTR_ERR(buffer
);
1531 rqst
[0].rq_iov
= &vars
->open_iov
[0];
1532 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
1534 oparms
= (struct cifs_open_parms
) {
1536 .disposition
= FILE_OPEN
,
1537 .create_options
= cifs_create_options(cifs_sb
, create_options
),
1541 if (qi
.flags
& PASSTHRU_FSCTL
) {
1542 switch (qi
.info_type
& FSCTL_DEVICE_ACCESS_MASK
) {
1543 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS
:
1544 oparms
.desired_access
= FILE_READ_DATA
| FILE_WRITE_DATA
| FILE_READ_ATTRIBUTES
| SYNCHRONIZE
;
1546 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS
:
1547 oparms
.desired_access
= GENERIC_ALL
;
1549 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS
:
1550 oparms
.desired_access
= GENERIC_READ
;
1552 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS
:
1553 oparms
.desired_access
= GENERIC_WRITE
;
1556 } else if (qi
.flags
& PASSTHRU_SET_INFO
) {
1557 oparms
.desired_access
= GENERIC_WRITE
;
1559 oparms
.desired_access
= FILE_READ_ATTRIBUTES
| READ_CONTROL
;
1562 rc
= SMB2_open_init(tcon
, server
,
1563 &rqst
[0], &oplock
, &oparms
, path
);
1565 goto free_output_buffer
;
1566 smb2_set_next_command(tcon
, &rqst
[0]);
1569 if (qi
.flags
& PASSTHRU_FSCTL
) {
1570 /* Can eventually relax perm check since server enforces too */
1571 if (!capable(CAP_SYS_ADMIN
)) {
1575 rqst
[1].rq_iov
= &vars
->io_iov
[0];
1576 rqst
[1].rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
1578 rc
= SMB2_ioctl_init(tcon
, server
, &rqst
[1], COMPOUND_FID
, COMPOUND_FID
,
1579 qi
.info_type
, buffer
, qi
.output_buffer_length
,
1580 CIFSMaxBufSize
- MAX_SMB2_CREATE_RESPONSE_SIZE
-
1581 MAX_SMB2_CLOSE_RESPONSE_SIZE
);
1582 free_req1_func
= SMB2_ioctl_free
;
1583 } else if (qi
.flags
== PASSTHRU_SET_INFO
) {
1584 /* Can eventually relax perm check since server enforces too */
1585 if (!capable(CAP_SYS_ADMIN
)) {
1589 if (qi
.output_buffer_length
< 8) {
1593 rqst
[1].rq_iov
= vars
->si_iov
;
1594 rqst
[1].rq_nvec
= 1;
1596 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1600 rc
= SMB2_set_info_init(tcon
, server
, &rqst
[1], COMPOUND_FID
, COMPOUND_FID
,
1601 current
->tgid
, FILE_END_OF_FILE_INFORMATION
,
1602 SMB2_O_INFO_FILE
, 0, data
, size
);
1603 free_req1_func
= SMB2_set_info_free
;
1604 } else if (qi
.flags
== PASSTHRU_QUERY_INFO
) {
1605 rqst
[1].rq_iov
= &vars
->qi_iov
;
1606 rqst
[1].rq_nvec
= 1;
1608 rc
= SMB2_query_info_init(tcon
, server
,
1609 &rqst
[1], COMPOUND_FID
,
1610 COMPOUND_FID
, qi
.file_info_class
,
1611 qi
.info_type
, qi
.additional_information
,
1612 qi
.input_buffer_length
,
1613 qi
.output_buffer_length
, buffer
);
1614 free_req1_func
= SMB2_query_info_free
;
1615 } else { /* unknown flags */
1616 cifs_tcon_dbg(VFS
, "Invalid passthru query flags: 0x%x\n",
1623 smb2_set_next_command(tcon
, &rqst
[1]);
1624 smb2_set_related(&rqst
[1]);
1627 rqst
[2].rq_iov
= &vars
->close_iov
;
1628 rqst
[2].rq_nvec
= 1;
1630 rc
= SMB2_close_init(tcon
, server
,
1631 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
1634 smb2_set_related(&rqst
[2]);
1636 rc
= compound_send_recv(xid
, ses
, server
,
1638 resp_buftype
, rsp_iov
);
1642 /* No need to bump num_remote_opens since handle immediately closed */
1643 if (qi
.flags
& PASSTHRU_FSCTL
) {
1644 pqi
= (struct smb_query_info __user
*)arg
;
1645 io_rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
[1].iov_base
;
1646 if (le32_to_cpu(io_rsp
->OutputCount
) < qi
.input_buffer_length
)
1647 qi
.input_buffer_length
= le32_to_cpu(io_rsp
->OutputCount
);
1648 if (qi
.input_buffer_length
> 0 &&
1649 le32_to_cpu(io_rsp
->OutputOffset
) + qi
.input_buffer_length
1650 > rsp_iov
[1].iov_len
) {
1655 if (copy_to_user(&pqi
->input_buffer_length
,
1656 &qi
.input_buffer_length
,
1657 sizeof(qi
.input_buffer_length
))) {
1662 if (copy_to_user((void __user
*)pqi
+ sizeof(struct smb_query_info
),
1663 (const void *)io_rsp
+ le32_to_cpu(io_rsp
->OutputOffset
),
1664 qi
.input_buffer_length
))
1667 pqi
= (struct smb_query_info __user
*)arg
;
1668 qi_rsp
= (struct smb2_query_info_rsp
*)rsp_iov
[1].iov_base
;
1669 if (le32_to_cpu(qi_rsp
->OutputBufferLength
) < qi
.input_buffer_length
)
1670 qi
.input_buffer_length
= le32_to_cpu(qi_rsp
->OutputBufferLength
);
1671 if (copy_to_user(&pqi
->input_buffer_length
,
1672 &qi
.input_buffer_length
,
1673 sizeof(qi
.input_buffer_length
))) {
1678 if (copy_to_user(pqi
+ 1, qi_rsp
->Buffer
,
1679 qi
.input_buffer_length
))
1684 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
1685 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
1686 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
1687 SMB2_close_free(&rqst
[2]);
1689 free_req1_func(&rqst
[1]);
1691 SMB2_open_free(&rqst
[0]);
1700 smb2_copychunk_range(const unsigned int xid
,
1701 struct cifsFileInfo
*srcfile
,
1702 struct cifsFileInfo
*trgtfile
, u64 src_off
,
1703 u64 len
, u64 dest_off
)
1706 unsigned int ret_data_len
;
1707 struct copychunk_ioctl
*pcchunk
;
1708 struct copychunk_ioctl_rsp
*retbuf
= NULL
;
1709 struct cifs_tcon
*tcon
;
1710 int chunks_copied
= 0;
1711 bool chunk_sizes_updated
= false;
1712 ssize_t bytes_written
, total_bytes_written
= 0;
1714 pcchunk
= kmalloc(sizeof(struct copychunk_ioctl
), GFP_KERNEL
);
1715 if (pcchunk
== NULL
)
1718 cifs_dbg(FYI
, "%s: about to call request res key\n", __func__
);
1719 /* Request a key from the server to identify the source of the copy */
1720 rc
= SMB2_request_res_key(xid
, tlink_tcon(srcfile
->tlink
),
1721 srcfile
->fid
.persistent_fid
,
1722 srcfile
->fid
.volatile_fid
, pcchunk
);
1724 /* Note: request_res_key sets res_key null only if rc !=0 */
1728 /* For now array only one chunk long, will make more flexible later */
1729 pcchunk
->ChunkCount
= cpu_to_le32(1);
1730 pcchunk
->Reserved
= 0;
1731 pcchunk
->Reserved2
= 0;
1733 tcon
= tlink_tcon(trgtfile
->tlink
);
1736 pcchunk
->SourceOffset
= cpu_to_le64(src_off
);
1737 pcchunk
->TargetOffset
= cpu_to_le64(dest_off
);
1739 cpu_to_le32(min_t(u64
, len
, tcon
->max_bytes_chunk
));
1741 /* Request server copy to target from src identified by key */
1744 rc
= SMB2_ioctl(xid
, tcon
, trgtfile
->fid
.persistent_fid
,
1745 trgtfile
->fid
.volatile_fid
, FSCTL_SRV_COPYCHUNK_WRITE
,
1746 (char *)pcchunk
, sizeof(struct copychunk_ioctl
),
1747 CIFSMaxBufSize
, (char **)&retbuf
, &ret_data_len
);
1750 sizeof(struct copychunk_ioctl_rsp
)) {
1751 cifs_tcon_dbg(VFS
, "Invalid cchunk response size\n");
1755 if (retbuf
->TotalBytesWritten
== 0) {
1756 cifs_dbg(FYI
, "no bytes copied\n");
1761 * Check if server claimed to write more than we asked
1763 if (le32_to_cpu(retbuf
->TotalBytesWritten
) >
1764 le32_to_cpu(pcchunk
->Length
)) {
1765 cifs_tcon_dbg(VFS
, "Invalid copy chunk response\n");
1769 if (le32_to_cpu(retbuf
->ChunksWritten
) != 1) {
1770 cifs_tcon_dbg(VFS
, "Invalid num chunks written\n");
1776 bytes_written
= le32_to_cpu(retbuf
->TotalBytesWritten
);
1777 src_off
+= bytes_written
;
1778 dest_off
+= bytes_written
;
1779 len
-= bytes_written
;
1780 total_bytes_written
+= bytes_written
;
1782 cifs_dbg(FYI
, "Chunks %d PartialChunk %d Total %zu\n",
1783 le32_to_cpu(retbuf
->ChunksWritten
),
1784 le32_to_cpu(retbuf
->ChunkBytesWritten
),
1786 } else if (rc
== -EINVAL
) {
1787 if (ret_data_len
!= sizeof(struct copychunk_ioctl_rsp
))
1790 cifs_dbg(FYI
, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1791 le32_to_cpu(retbuf
->ChunksWritten
),
1792 le32_to_cpu(retbuf
->ChunkBytesWritten
),
1793 le32_to_cpu(retbuf
->TotalBytesWritten
));
1796 * Check if this is the first request using these sizes,
1797 * (ie check if copy succeed once with original sizes
1798 * and check if the server gave us different sizes after
1799 * we already updated max sizes on previous request).
1800 * if not then why is the server returning an error now
1802 if ((chunks_copied
!= 0) || chunk_sizes_updated
)
1805 /* Check that server is not asking us to grow size */
1806 if (le32_to_cpu(retbuf
->ChunkBytesWritten
) <
1807 tcon
->max_bytes_chunk
)
1808 tcon
->max_bytes_chunk
=
1809 le32_to_cpu(retbuf
->ChunkBytesWritten
);
1811 goto cchunk_out
; /* server gave us bogus size */
1813 /* No need to change MaxChunks since already set to 1 */
1814 chunk_sizes_updated
= true;
1825 return total_bytes_written
;
1829 smb2_flush_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
1830 struct cifs_fid
*fid
)
1832 return SMB2_flush(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
1836 smb2_read_data_offset(char *buf
)
1838 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
1840 return rsp
->DataOffset
;
1844 smb2_read_data_length(char *buf
, bool in_remaining
)
1846 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
1849 return le32_to_cpu(rsp
->DataRemaining
);
1851 return le32_to_cpu(rsp
->DataLength
);
1856 smb2_sync_read(const unsigned int xid
, struct cifs_fid
*pfid
,
1857 struct cifs_io_parms
*parms
, unsigned int *bytes_read
,
1858 char **buf
, int *buf_type
)
1860 parms
->persistent_fid
= pfid
->persistent_fid
;
1861 parms
->volatile_fid
= pfid
->volatile_fid
;
1862 return SMB2_read(xid
, parms
, bytes_read
, buf
, buf_type
);
1866 smb2_sync_write(const unsigned int xid
, struct cifs_fid
*pfid
,
1867 struct cifs_io_parms
*parms
, unsigned int *written
,
1868 struct kvec
*iov
, unsigned long nr_segs
)
1871 parms
->persistent_fid
= pfid
->persistent_fid
;
1872 parms
->volatile_fid
= pfid
->volatile_fid
;
1873 return SMB2_write(xid
, parms
, written
, iov
, nr_segs
);
1876 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1877 static bool smb2_set_sparse(const unsigned int xid
, struct cifs_tcon
*tcon
,
1878 struct cifsFileInfo
*cfile
, struct inode
*inode
, __u8 setsparse
)
1880 struct cifsInodeInfo
*cifsi
;
1883 cifsi
= CIFS_I(inode
);
1885 /* if file already sparse don't bother setting sparse again */
1886 if ((cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) && setsparse
)
1887 return true; /* already sparse */
1889 if (!(cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) && !setsparse
)
1890 return true; /* already not sparse */
1893 * Can't check for sparse support on share the usual way via the
1894 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1895 * since Samba server doesn't set the flag on the share, yet
1896 * supports the set sparse FSCTL and returns sparse correctly
1897 * in the file attributes. If we fail setting sparse though we
1898 * mark that server does not support sparse files for this share
1899 * to avoid repeatedly sending the unsupported fsctl to server
1900 * if the file is repeatedly extended.
1902 if (tcon
->broken_sparse_sup
)
1905 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
1906 cfile
->fid
.volatile_fid
, FSCTL_SET_SPARSE
,
1907 &setsparse
, 1, CIFSMaxBufSize
, NULL
, NULL
);
1909 tcon
->broken_sparse_sup
= true;
1910 cifs_dbg(FYI
, "set sparse rc = %d\n", rc
);
1915 cifsi
->cifsAttrs
|= FILE_ATTRIBUTE_SPARSE_FILE
;
1917 cifsi
->cifsAttrs
&= (~FILE_ATTRIBUTE_SPARSE_FILE
);
1923 smb2_set_file_size(const unsigned int xid
, struct cifs_tcon
*tcon
,
1924 struct cifsFileInfo
*cfile
, __u64 size
, bool set_alloc
)
1926 __le64 eof
= cpu_to_le64(size
);
1927 struct inode
*inode
;
1930 * If extending file more than one page make sparse. Many Linux fs
1931 * make files sparse by default when extending via ftruncate
1933 inode
= d_inode(cfile
->dentry
);
1935 if (!set_alloc
&& (size
> inode
->i_size
+ 8192)) {
1936 __u8 set_sparse
= 1;
1938 /* whether set sparse succeeds or not, extend the file */
1939 smb2_set_sparse(xid
, tcon
, cfile
, inode
, set_sparse
);
1942 return SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
1943 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
1947 smb2_duplicate_extents(const unsigned int xid
,
1948 struct cifsFileInfo
*srcfile
,
1949 struct cifsFileInfo
*trgtfile
, u64 src_off
,
1950 u64 len
, u64 dest_off
)
1953 unsigned int ret_data_len
;
1954 struct inode
*inode
;
1955 struct duplicate_extents_to_file dup_ext_buf
;
1956 struct cifs_tcon
*tcon
= tlink_tcon(trgtfile
->tlink
);
1958 /* server fileays advertise duplicate extent support with this flag */
1959 if ((le32_to_cpu(tcon
->fsAttrInfo
.Attributes
) &
1960 FILE_SUPPORTS_BLOCK_REFCOUNTING
) == 0)
1963 dup_ext_buf
.VolatileFileHandle
= srcfile
->fid
.volatile_fid
;
1964 dup_ext_buf
.PersistentFileHandle
= srcfile
->fid
.persistent_fid
;
1965 dup_ext_buf
.SourceFileOffset
= cpu_to_le64(src_off
);
1966 dup_ext_buf
.TargetFileOffset
= cpu_to_le64(dest_off
);
1967 dup_ext_buf
.ByteCount
= cpu_to_le64(len
);
1968 cifs_dbg(FYI
, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1969 src_off
, dest_off
, len
);
1971 inode
= d_inode(trgtfile
->dentry
);
1972 if (inode
->i_size
< dest_off
+ len
) {
1973 rc
= smb2_set_file_size(xid
, tcon
, trgtfile
, dest_off
+ len
, false);
1975 goto duplicate_extents_out
;
1978 * Although also could set plausible allocation size (i_blocks)
1979 * here in addition to setting the file size, in reflink
1980 * it is likely that the target file is sparse. Its allocation
1981 * size will be queried on next revalidate, but it is important
1982 * to make sure that file's cached size is updated immediately
1984 cifs_setsize(inode
, dest_off
+ len
);
1986 rc
= SMB2_ioctl(xid
, tcon
, trgtfile
->fid
.persistent_fid
,
1987 trgtfile
->fid
.volatile_fid
,
1988 FSCTL_DUPLICATE_EXTENTS_TO_FILE
,
1989 (char *)&dup_ext_buf
,
1990 sizeof(struct duplicate_extents_to_file
),
1991 CIFSMaxBufSize
, NULL
,
1994 if (ret_data_len
> 0)
1995 cifs_dbg(FYI
, "Non-zero response length in duplicate extents\n");
1997 duplicate_extents_out
:
2002 smb2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2003 struct cifsFileInfo
*cfile
)
2005 return SMB2_set_compression(xid
, tcon
, cfile
->fid
.persistent_fid
,
2006 cfile
->fid
.volatile_fid
);
2010 smb3_set_integrity(const unsigned int xid
, struct cifs_tcon
*tcon
,
2011 struct cifsFileInfo
*cfile
)
2013 struct fsctl_set_integrity_information_req integr_info
;
2014 unsigned int ret_data_len
;
2016 integr_info
.ChecksumAlgorithm
= cpu_to_le16(CHECKSUM_TYPE_UNCHANGED
);
2017 integr_info
.Flags
= 0;
2018 integr_info
.Reserved
= 0;
2020 return SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
2021 cfile
->fid
.volatile_fid
,
2022 FSCTL_SET_INTEGRITY_INFORMATION
,
2023 (char *)&integr_info
,
2024 sizeof(struct fsctl_set_integrity_information_req
),
2025 CIFSMaxBufSize
, NULL
,
2030 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2031 #define GMT_TOKEN_SIZE 50
2033 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2036 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2037 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2040 smb3_enum_snapshots(const unsigned int xid
, struct cifs_tcon
*tcon
,
2041 struct cifsFileInfo
*cfile
, void __user
*ioc_buf
)
2043 char *retbuf
= NULL
;
2044 unsigned int ret_data_len
= 0;
2046 u32 max_response_size
;
2047 struct smb_snapshot_array snapshot_in
;
2050 * On the first query to enumerate the list of snapshots available
2051 * for this volume the buffer begins with 0 (number of snapshots
2052 * which can be returned is zero since at that point we do not know
2053 * how big the buffer needs to be). On the second query,
2054 * it (ret_data_len) is set to number of snapshots so we can
2055 * know to set the maximum response size larger (see below).
2057 if (get_user(ret_data_len
, (unsigned int __user
*)ioc_buf
))
2061 * Note that for snapshot queries that servers like Azure expect that
2062 * the first query be minimal size (and just used to get the number/size
2063 * of previous versions) so response size must be specified as EXACTLY
2064 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2067 if (ret_data_len
== 0)
2068 max_response_size
= MIN_SNAPSHOT_ARRAY_SIZE
;
2070 max_response_size
= CIFSMaxBufSize
;
2072 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
2073 cfile
->fid
.volatile_fid
,
2074 FSCTL_SRV_ENUMERATE_SNAPSHOTS
,
2075 NULL
, 0 /* no input data */, max_response_size
,
2078 cifs_dbg(FYI
, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2083 if (ret_data_len
&& (ioc_buf
!= NULL
) && (retbuf
!= NULL
)) {
2085 if (copy_from_user(&snapshot_in
, ioc_buf
,
2086 sizeof(struct smb_snapshot_array
))) {
2093 * Check for min size, ie not large enough to fit even one GMT
2094 * token (snapshot). On the first ioctl some users may pass in
2095 * smaller size (or zero) to simply get the size of the array
2096 * so the user space caller can allocate sufficient memory
2097 * and retry the ioctl again with larger array size sufficient
2098 * to hold all of the snapshot GMT tokens on the second try.
2100 if (snapshot_in
.snapshot_array_size
< GMT_TOKEN_SIZE
)
2101 ret_data_len
= sizeof(struct smb_snapshot_array
);
2104 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2105 * the snapshot array (of 50 byte GMT tokens) each
2106 * representing an available previous version of the data
2108 if (ret_data_len
> (snapshot_in
.snapshot_array_size
+
2109 sizeof(struct smb_snapshot_array
)))
2110 ret_data_len
= snapshot_in
.snapshot_array_size
+
2111 sizeof(struct smb_snapshot_array
);
2113 if (copy_to_user(ioc_buf
, retbuf
, ret_data_len
))
2124 smb3_notify(const unsigned int xid
, struct file
*pfile
,
2125 void __user
*ioc_buf
, bool return_changes
)
2127 struct smb3_notify_info notify
;
2128 struct smb3_notify_info __user
*pnotify_buf
;
2129 struct dentry
*dentry
= pfile
->f_path
.dentry
;
2130 struct inode
*inode
= file_inode(pfile
);
2131 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
2132 struct cifs_open_parms oparms
;
2133 struct cifs_fid fid
;
2134 struct cifs_tcon
*tcon
;
2135 const unsigned char *path
;
2136 char *returned_ioctl_info
= NULL
;
2137 void *page
= alloc_dentry_path();
2138 __le16
*utf16_path
= NULL
;
2139 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2143 path
= build_path_from_dentry(dentry
, page
);
2149 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
2150 if (utf16_path
== NULL
) {
2155 if (return_changes
) {
2156 if (copy_from_user(¬ify
, ioc_buf
, sizeof(struct smb3_notify_info
))) {
2161 if (copy_from_user(¬ify
, ioc_buf
, sizeof(struct smb3_notify
))) {
2165 notify
.data_len
= 0;
2168 tcon
= cifs_sb_master_tcon(cifs_sb
);
2169 oparms
= (struct cifs_open_parms
) {
2172 .desired_access
= FILE_READ_ATTRIBUTES
| FILE_READ_DATA
,
2173 .disposition
= FILE_OPEN
,
2174 .create_options
= cifs_create_options(cifs_sb
, 0),
2178 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
, NULL
,
2183 rc
= SMB2_change_notify(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
2184 notify
.watch_tree
, notify
.completion_filter
,
2185 notify
.data_len
, &returned_ioctl_info
, &ret_len
);
2187 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
2189 cifs_dbg(FYI
, "change notify for path %s rc %d\n", path
, rc
);
2190 if (return_changes
&& (ret_len
> 0) && (notify
.data_len
> 0)) {
2191 if (ret_len
> notify
.data_len
)
2192 ret_len
= notify
.data_len
;
2193 pnotify_buf
= (struct smb3_notify_info __user
*)ioc_buf
;
2194 if (copy_to_user(pnotify_buf
->notify_data
, returned_ioctl_info
, ret_len
))
2196 else if (copy_to_user(&pnotify_buf
->data_len
, &ret_len
, sizeof(ret_len
)))
2199 kfree(returned_ioctl_info
);
2201 free_dentry_path(page
);
2207 smb2_query_dir_first(const unsigned int xid
, struct cifs_tcon
*tcon
,
2208 const char *path
, struct cifs_sb_info
*cifs_sb
,
2209 struct cifs_fid
*fid
, __u16 search_flags
,
2210 struct cifs_search_info
*srch_inf
)
2213 struct smb_rqst rqst
[2];
2214 struct kvec rsp_iov
[2];
2215 int resp_buftype
[2];
2216 struct kvec open_iov
[SMB2_CREATE_IOV_SIZE
];
2217 struct kvec qd_iov
[SMB2_QUERY_DIRECTORY_IOV_SIZE
];
2219 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2220 struct cifs_open_parms oparms
;
2221 struct smb2_query_directory_rsp
*qd_rsp
= NULL
;
2222 struct smb2_create_rsp
*op_rsp
= NULL
;
2223 struct TCP_Server_Info
*server
= cifs_pick_channel(tcon
->ses
);
2224 int retry_count
= 0;
2226 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
2230 if (smb3_encryption_required(tcon
))
2231 flags
|= CIFS_TRANSFORM_REQ
;
2233 memset(rqst
, 0, sizeof(rqst
));
2234 resp_buftype
[0] = resp_buftype
[1] = CIFS_NO_BUFFER
;
2235 memset(rsp_iov
, 0, sizeof(rsp_iov
));
2238 memset(&open_iov
, 0, sizeof(open_iov
));
2239 rqst
[0].rq_iov
= open_iov
;
2240 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2242 oparms
= (struct cifs_open_parms
) {
2245 .desired_access
= FILE_READ_ATTRIBUTES
| FILE_READ_DATA
,
2246 .disposition
= FILE_OPEN
,
2247 .create_options
= cifs_create_options(cifs_sb
, 0),
2251 rc
= SMB2_open_init(tcon
, server
,
2252 &rqst
[0], &oplock
, &oparms
, utf16_path
);
2255 smb2_set_next_command(tcon
, &rqst
[0]);
2257 /* Query directory */
2258 srch_inf
->entries_in_buffer
= 0;
2259 srch_inf
->index_of_last_entry
= 2;
2261 memset(&qd_iov
, 0, sizeof(qd_iov
));
2262 rqst
[1].rq_iov
= qd_iov
;
2263 rqst
[1].rq_nvec
= SMB2_QUERY_DIRECTORY_IOV_SIZE
;
2265 rc
= SMB2_query_directory_init(xid
, tcon
, server
,
2267 COMPOUND_FID
, COMPOUND_FID
,
2268 0, srch_inf
->info_level
);
2272 smb2_set_related(&rqst
[1]);
2275 rc
= compound_send_recv(xid
, tcon
->ses
, server
,
2277 resp_buftype
, rsp_iov
);
2279 if (rc
== -EAGAIN
&& retry_count
++ < 10)
2282 /* If the open failed there is nothing to do */
2283 op_rsp
= (struct smb2_create_rsp
*)rsp_iov
[0].iov_base
;
2284 if (op_rsp
== NULL
|| op_rsp
->hdr
.Status
!= STATUS_SUCCESS
) {
2285 cifs_dbg(FYI
, "query_dir_first: open failed rc=%d\n", rc
);
2288 fid
->persistent_fid
= op_rsp
->PersistentFileId
;
2289 fid
->volatile_fid
= op_rsp
->VolatileFileId
;
2291 /* Anything else than ENODATA means a genuine error */
2292 if (rc
&& rc
!= -ENODATA
) {
2293 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
2294 cifs_dbg(FYI
, "query_dir_first: query directory failed rc=%d\n", rc
);
2295 trace_smb3_query_dir_err(xid
, fid
->persistent_fid
,
2296 tcon
->tid
, tcon
->ses
->Suid
, 0, 0, rc
);
2300 atomic_inc(&tcon
->num_remote_opens
);
2302 qd_rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
[1].iov_base
;
2303 if (qd_rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
2304 trace_smb3_query_dir_done(xid
, fid
->persistent_fid
,
2305 tcon
->tid
, tcon
->ses
->Suid
, 0, 0);
2306 srch_inf
->endOfSearch
= true;
2311 rc
= smb2_parse_query_directory(tcon
, &rsp_iov
[1], resp_buftype
[1],
2314 trace_smb3_query_dir_err(xid
, fid
->persistent_fid
, tcon
->tid
,
2315 tcon
->ses
->Suid
, 0, 0, rc
);
2318 resp_buftype
[1] = CIFS_NO_BUFFER
;
2320 trace_smb3_query_dir_done(xid
, fid
->persistent_fid
, tcon
->tid
,
2321 tcon
->ses
->Suid
, 0, srch_inf
->entries_in_buffer
);
2325 SMB2_open_free(&rqst
[0]);
2326 SMB2_query_directory_free(&rqst
[1]);
2327 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
2328 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
2333 smb2_query_dir_next(const unsigned int xid
, struct cifs_tcon
*tcon
,
2334 struct cifs_fid
*fid
, __u16 search_flags
,
2335 struct cifs_search_info
*srch_inf
)
2337 return SMB2_query_directory(xid
, tcon
, fid
->persistent_fid
,
2338 fid
->volatile_fid
, 0, srch_inf
);
2342 smb2_close_dir(const unsigned int xid
, struct cifs_tcon
*tcon
,
2343 struct cifs_fid
*fid
)
2345 return SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
2349 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2350 * the number of credits and return true. Otherwise - return false.
2353 smb2_is_status_pending(char *buf
, struct TCP_Server_Info
*server
)
2355 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2356 int scredits
, in_flight
;
2358 if (shdr
->Status
!= STATUS_PENDING
)
2361 if (shdr
->CreditRequest
) {
2362 spin_lock(&server
->req_lock
);
2363 server
->credits
+= le16_to_cpu(shdr
->CreditRequest
);
2364 scredits
= server
->credits
;
2365 in_flight
= server
->in_flight
;
2366 spin_unlock(&server
->req_lock
);
2367 wake_up(&server
->request_q
);
2369 trace_smb3_pend_credits(server
->CurrentMid
,
2370 server
->conn_id
, server
->hostname
, scredits
,
2371 le16_to_cpu(shdr
->CreditRequest
), in_flight
);
2372 cifs_dbg(FYI
, "%s: status pending add %u credits total=%d\n",
2373 __func__
, le16_to_cpu(shdr
->CreditRequest
), scredits
);
2380 smb2_is_session_expired(char *buf
)
2382 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2384 if (shdr
->Status
!= STATUS_NETWORK_SESSION_EXPIRED
&&
2385 shdr
->Status
!= STATUS_USER_SESSION_DELETED
)
2388 trace_smb3_ses_expired(le32_to_cpu(shdr
->Id
.SyncId
.TreeId
),
2389 le64_to_cpu(shdr
->SessionId
),
2390 le16_to_cpu(shdr
->Command
),
2391 le64_to_cpu(shdr
->MessageId
));
2392 cifs_dbg(FYI
, "Session expired or deleted\n");
2398 smb2_is_status_io_timeout(char *buf
)
2400 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2402 if (shdr
->Status
== STATUS_IO_TIMEOUT
)
2409 smb2_is_network_name_deleted(char *buf
, struct TCP_Server_Info
*server
)
2411 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2412 struct TCP_Server_Info
*pserver
;
2413 struct cifs_ses
*ses
;
2414 struct cifs_tcon
*tcon
;
2416 if (shdr
->Status
!= STATUS_NETWORK_NAME_DELETED
)
2419 /* If server is a channel, select the primary channel */
2420 pserver
= SERVER_IS_CHAN(server
) ? server
->primary_server
: server
;
2422 spin_lock(&cifs_tcp_ses_lock
);
2423 list_for_each_entry(ses
, &pserver
->smb_ses_list
, smb_ses_list
) {
2424 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2425 if (tcon
->tid
== le32_to_cpu(shdr
->Id
.SyncId
.TreeId
)) {
2426 spin_lock(&tcon
->tc_lock
);
2427 tcon
->need_reconnect
= true;
2428 spin_unlock(&tcon
->tc_lock
);
2429 spin_unlock(&cifs_tcp_ses_lock
);
2430 pr_warn_once("Server share %s deleted.\n",
2436 spin_unlock(&cifs_tcp_ses_lock
);
2442 smb2_oplock_response(struct cifs_tcon
*tcon
, __u64 persistent_fid
,
2443 __u64 volatile_fid
, __u16 net_fid
, struct cifsInodeInfo
*cinode
)
2445 if (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
)
2446 return SMB2_lease_break(0, tcon
, cinode
->lease_key
,
2447 smb2_get_lease_state(cinode
));
2449 return SMB2_oplock_break(0, tcon
, persistent_fid
, volatile_fid
,
2450 CIFS_CACHE_READ(cinode
) ? 1 : 0);
2454 smb2_set_related(struct smb_rqst
*rqst
)
2456 struct smb2_hdr
*shdr
;
2458 shdr
= (struct smb2_hdr
*)(rqst
->rq_iov
[0].iov_base
);
2460 cifs_dbg(FYI
, "shdr NULL in smb2_set_related\n");
2463 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2466 char smb2_padding
[7] = {0, 0, 0, 0, 0, 0, 0};
2469 smb2_set_next_command(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
)
2471 struct smb2_hdr
*shdr
;
2472 struct cifs_ses
*ses
= tcon
->ses
;
2473 struct TCP_Server_Info
*server
= ses
->server
;
2474 unsigned long len
= smb_rqst_len(server
, rqst
);
2477 shdr
= (struct smb2_hdr
*)(rqst
->rq_iov
[0].iov_base
);
2479 cifs_dbg(FYI
, "shdr NULL in smb2_set_next_command\n");
2483 /* SMB headers in a compound are 8 byte aligned. */
2485 /* No padding needed */
2489 num_padding
= 8 - (len
& 7);
2490 if (!smb3_encryption_required(tcon
)) {
2492 * If we do not have encryption then we can just add an extra
2493 * iov for the padding.
2495 rqst
->rq_iov
[rqst
->rq_nvec
].iov_base
= smb2_padding
;
2496 rqst
->rq_iov
[rqst
->rq_nvec
].iov_len
= num_padding
;
2501 * We can not add a small padding iov for the encryption case
2502 * because the encryption framework can not handle the padding
2504 * We have to flatten this into a single buffer and add
2505 * the padding to it.
2507 for (i
= 1; i
< rqst
->rq_nvec
; i
++) {
2508 memcpy(rqst
->rq_iov
[0].iov_base
+
2509 rqst
->rq_iov
[0].iov_len
,
2510 rqst
->rq_iov
[i
].iov_base
,
2511 rqst
->rq_iov
[i
].iov_len
);
2512 rqst
->rq_iov
[0].iov_len
+= rqst
->rq_iov
[i
].iov_len
;
2514 memset(rqst
->rq_iov
[0].iov_base
+ rqst
->rq_iov
[0].iov_len
,
2516 rqst
->rq_iov
[0].iov_len
+= num_padding
;
2522 shdr
->NextCommand
= cpu_to_le32(len
);
2526 * Passes the query info response back to the caller on success.
2527 * Caller need to free this with free_rsp_buf().
2530 smb2_query_info_compound(const unsigned int xid
, struct cifs_tcon
*tcon
,
2531 const char *path
, u32 desired_access
,
2532 u32
class, u32 type
, u32 output_len
,
2533 struct kvec
*rsp
, int *buftype
,
2534 struct cifs_sb_info
*cifs_sb
)
2536 struct smb2_compound_vars
*vars
;
2537 struct cifs_ses
*ses
= tcon
->ses
;
2538 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
2539 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
2540 struct smb_rqst
*rqst
;
2541 int resp_buftype
[3];
2542 struct kvec
*rsp_iov
;
2543 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2544 struct cifs_open_parms oparms
;
2545 struct cifs_fid fid
;
2548 struct cached_fid
*cfid
= NULL
;
2552 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
2556 if (smb3_encryption_required(tcon
))
2557 flags
|= CIFS_TRANSFORM_REQ
;
2559 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
2560 vars
= kzalloc(sizeof(*vars
), GFP_KERNEL
);
2566 rsp_iov
= vars
->rsp_iov
;
2569 * We can only call this for things we know are directories.
2571 if (!strcmp(path
, ""))
2572 open_cached_dir(xid
, tcon
, path
, cifs_sb
, false,
2573 &cfid
); /* cfid null if open dir failed */
2575 rqst
[0].rq_iov
= vars
->open_iov
;
2576 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2578 oparms
= (struct cifs_open_parms
) {
2581 .desired_access
= desired_access
,
2582 .disposition
= FILE_OPEN
,
2583 .create_options
= cifs_create_options(cifs_sb
, 0),
2587 rc
= SMB2_open_init(tcon
, server
,
2588 &rqst
[0], &oplock
, &oparms
, utf16_path
);
2591 smb2_set_next_command(tcon
, &rqst
[0]);
2593 rqst
[1].rq_iov
= &vars
->qi_iov
;
2594 rqst
[1].rq_nvec
= 1;
2597 rc
= SMB2_query_info_init(tcon
, server
,
2599 cfid
->fid
.persistent_fid
,
2600 cfid
->fid
.volatile_fid
,
2605 rc
= SMB2_query_info_init(tcon
, server
,
2616 smb2_set_next_command(tcon
, &rqst
[1]);
2617 smb2_set_related(&rqst
[1]);
2620 rqst
[2].rq_iov
= &vars
->close_iov
;
2621 rqst
[2].rq_nvec
= 1;
2623 rc
= SMB2_close_init(tcon
, server
,
2624 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
2627 smb2_set_related(&rqst
[2]);
2630 rc
= compound_send_recv(xid
, ses
, server
,
2632 &resp_buftype
[1], &rsp_iov
[1]);
2634 rc
= compound_send_recv(xid
, ses
, server
,
2636 resp_buftype
, rsp_iov
);
2639 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
2640 if (rc
== -EREMCHG
) {
2641 tcon
->need_reconnect
= true;
2642 pr_warn_once("server share %s deleted\n",
2648 *buftype
= resp_buftype
[1];
2651 SMB2_open_free(&rqst
[0]);
2652 SMB2_query_info_free(&rqst
[1]);
2653 SMB2_close_free(&rqst
[2]);
2654 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
2655 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
2657 close_cached_dir(cfid
);
2665 smb2_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
2666 struct cifs_sb_info
*cifs_sb
, struct kstatfs
*buf
)
2668 struct smb2_query_info_rsp
*rsp
;
2669 struct smb2_fs_full_size_info
*info
= NULL
;
2670 struct kvec rsp_iov
= {NULL
, 0};
2671 int buftype
= CIFS_NO_BUFFER
;
2675 rc
= smb2_query_info_compound(xid
, tcon
, "",
2676 FILE_READ_ATTRIBUTES
,
2677 FS_FULL_SIZE_INFORMATION
,
2678 SMB2_O_INFO_FILESYSTEM
,
2679 sizeof(struct smb2_fs_full_size_info
),
2680 &rsp_iov
, &buftype
, cifs_sb
);
2684 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2685 buf
->f_type
= SMB2_SUPER_MAGIC
;
2686 info
= (struct smb2_fs_full_size_info
*)(
2687 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
2688 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2689 le32_to_cpu(rsp
->OutputBufferLength
),
2691 sizeof(struct smb2_fs_full_size_info
));
2693 smb2_copy_fs_info_to_kstatfs(info
, buf
);
2696 trace_smb3_qfs_done(xid
, tcon
->tid
, tcon
->ses
->Suid
, tcon
->tree_name
, rc
);
2697 free_rsp_buf(buftype
, rsp_iov
.iov_base
);
2702 smb311_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
2703 struct cifs_sb_info
*cifs_sb
, struct kstatfs
*buf
)
2706 __le16 srch_path
= 0; /* Null - open root of share */
2707 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2708 struct cifs_open_parms oparms
;
2709 struct cifs_fid fid
;
2711 if (!tcon
->posix_extensions
)
2712 return smb2_queryfs(xid
, tcon
, cifs_sb
, buf
);
2714 oparms
= (struct cifs_open_parms
) {
2717 .desired_access
= FILE_READ_ATTRIBUTES
,
2718 .disposition
= FILE_OPEN
,
2719 .create_options
= cifs_create_options(cifs_sb
, 0),
2723 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
,
2728 rc
= SMB311_posix_qfs_info(xid
, tcon
, fid
.persistent_fid
,
2729 fid
.volatile_fid
, buf
);
2730 buf
->f_type
= SMB2_SUPER_MAGIC
;
2731 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
2736 smb2_compare_fids(struct cifsFileInfo
*ob1
, struct cifsFileInfo
*ob2
)
2738 return ob1
->fid
.persistent_fid
== ob2
->fid
.persistent_fid
&&
2739 ob1
->fid
.volatile_fid
== ob2
->fid
.volatile_fid
;
2743 smb2_mand_lock(const unsigned int xid
, struct cifsFileInfo
*cfile
, __u64 offset
,
2744 __u64 length
, __u32 type
, int lock
, int unlock
, bool wait
)
2746 if (unlock
&& !lock
)
2747 type
= SMB2_LOCKFLAG_UNLOCK
;
2748 return SMB2_lock(xid
, tlink_tcon(cfile
->tlink
),
2749 cfile
->fid
.persistent_fid
, cfile
->fid
.volatile_fid
,
2750 current
->tgid
, length
, offset
, type
, wait
);
2754 smb2_get_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
2756 memcpy(fid
->lease_key
, CIFS_I(inode
)->lease_key
, SMB2_LEASE_KEY_SIZE
);
2760 smb2_set_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
2762 memcpy(CIFS_I(inode
)->lease_key
, fid
->lease_key
, SMB2_LEASE_KEY_SIZE
);
2766 smb2_new_lease_key(struct cifs_fid
*fid
)
2768 generate_random_uuid(fid
->lease_key
);
2772 smb2_get_dfs_refer(const unsigned int xid
, struct cifs_ses
*ses
,
2773 const char *search_name
,
2774 struct dfs_info3_param
**target_nodes
,
2775 unsigned int *num_of_nodes
,
2776 const struct nls_table
*nls_codepage
, int remap
)
2779 __le16
*utf16_path
= NULL
;
2780 int utf16_path_len
= 0;
2781 struct cifs_tcon
*tcon
;
2782 struct fsctl_get_dfs_referral_req
*dfs_req
= NULL
;
2783 struct get_dfs_referral_rsp
*dfs_rsp
= NULL
;
2784 u32 dfs_req_size
= 0, dfs_rsp_size
= 0;
2785 int retry_count
= 0;
2787 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, search_name
);
2790 * Try to use the IPC tcon, otherwise just use any
2792 tcon
= ses
->tcon_ipc
;
2794 spin_lock(&cifs_tcp_ses_lock
);
2795 tcon
= list_first_entry_or_null(&ses
->tcon_list
,
2800 spin_unlock(&cifs_tcp_ses_lock
);
2804 cifs_dbg(VFS
, "session %p has no tcon available for a dfs referral request\n",
2810 utf16_path
= cifs_strndup_to_utf16(search_name
, PATH_MAX
,
2812 nls_codepage
, remap
);
2818 dfs_req_size
= sizeof(*dfs_req
) + utf16_path_len
;
2819 dfs_req
= kzalloc(dfs_req_size
, GFP_KERNEL
);
2825 /* Highest DFS referral version understood */
2826 dfs_req
->MaxReferralLevel
= DFS_VERSION
;
2828 /* Path to resolve in an UTF-16 null-terminated string */
2829 memcpy(dfs_req
->RequestFileName
, utf16_path
, utf16_path_len
);
2832 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
2833 FSCTL_DFS_GET_REFERRALS
,
2834 (char *)dfs_req
, dfs_req_size
, CIFSMaxBufSize
,
2835 (char **)&dfs_rsp
, &dfs_rsp_size
);
2836 if (!is_retryable_error(rc
))
2838 usleep_range(512, 2048);
2839 } while (++retry_count
< 5);
2841 if (!rc
&& !dfs_rsp
)
2844 if (!is_retryable_error(rc
) && rc
!= -ENOENT
&& rc
!= -EOPNOTSUPP
)
2845 cifs_tcon_dbg(VFS
, "%s: ioctl error: rc=%d\n", __func__
, rc
);
2849 rc
= parse_dfs_referrals(dfs_rsp
, dfs_rsp_size
,
2850 num_of_nodes
, target_nodes
,
2851 nls_codepage
, remap
, search_name
,
2852 true /* is_unicode */);
2854 cifs_tcon_dbg(VFS
, "parse error in %s rc=%d\n", __func__
, rc
);
2859 if (tcon
&& !tcon
->ipc
) {
2860 /* ipc tcons are not refcounted */
2861 spin_lock(&cifs_tcp_ses_lock
);
2863 /* tc_count can never go negative */
2864 WARN_ON(tcon
->tc_count
< 0);
2865 spin_unlock(&cifs_tcp_ses_lock
);
2873 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2874 static int parse_reparse_posix(struct reparse_posix_data
*buf
,
2875 struct cifs_sb_info
*cifs_sb
,
2876 struct cifs_open_info_data
*data
)
2881 switch ((type
= le64_to_cpu(buf
->InodeType
))) {
2882 case NFS_SPECFILE_LNK
:
2883 len
= le16_to_cpu(buf
->ReparseDataLength
);
2884 data
->symlink_target
= cifs_strndup_from_utf16(buf
->DataBuffer
,
2886 cifs_sb
->local_nls
);
2887 if (!data
->symlink_target
)
2889 convert_delimiter(data
->symlink_target
, '/');
2890 cifs_dbg(FYI
, "%s: target path: %s\n",
2891 __func__
, data
->symlink_target
);
2893 case NFS_SPECFILE_CHR
:
2894 case NFS_SPECFILE_BLK
:
2895 case NFS_SPECFILE_FIFO
:
2896 case NFS_SPECFILE_SOCK
:
2899 cifs_dbg(VFS
, "%s: unhandled inode type: 0x%llx\n",
2906 static int parse_reparse_symlink(struct reparse_symlink_data_buffer
*sym
,
2907 u32 plen
, bool unicode
,
2908 struct cifs_sb_info
*cifs_sb
,
2909 struct cifs_open_info_data
*data
)
2914 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2916 offs
= le16_to_cpu(sym
->SubstituteNameOffset
);
2917 len
= le16_to_cpu(sym
->SubstituteNameLength
);
2918 if (offs
+ 20 > plen
|| offs
+ len
+ 20 > plen
) {
2919 cifs_dbg(VFS
, "srv returned malformed symlink buffer\n");
2923 data
->symlink_target
= cifs_strndup_from_utf16(sym
->PathBuffer
+ offs
,
2925 cifs_sb
->local_nls
);
2926 if (!data
->symlink_target
)
2929 convert_delimiter(data
->symlink_target
, '/');
2930 cifs_dbg(FYI
, "%s: target path: %s\n", __func__
, data
->symlink_target
);
2935 int parse_reparse_point(struct reparse_data_buffer
*buf
,
2936 u32 plen
, struct cifs_sb_info
*cifs_sb
,
2937 bool unicode
, struct cifs_open_info_data
*data
)
2939 if (plen
< sizeof(*buf
)) {
2940 cifs_dbg(VFS
, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2945 if (plen
< le16_to_cpu(buf
->ReparseDataLength
) + sizeof(*buf
)) {
2946 cifs_dbg(VFS
, "%s: invalid reparse buf length: %d\n",
2951 data
->reparse
.buf
= buf
;
2953 /* See MS-FSCC 2.1.2 */
2954 switch (le32_to_cpu(buf
->ReparseTag
)) {
2955 case IO_REPARSE_TAG_NFS
:
2956 return parse_reparse_posix((struct reparse_posix_data
*)buf
,
2958 case IO_REPARSE_TAG_SYMLINK
:
2959 return parse_reparse_symlink(
2960 (struct reparse_symlink_data_buffer
*)buf
,
2961 plen
, unicode
, cifs_sb
, data
);
2962 case IO_REPARSE_TAG_LX_SYMLINK
:
2963 case IO_REPARSE_TAG_AF_UNIX
:
2964 case IO_REPARSE_TAG_LX_FIFO
:
2965 case IO_REPARSE_TAG_LX_CHR
:
2966 case IO_REPARSE_TAG_LX_BLK
:
2969 cifs_dbg(VFS
, "%s: unhandled reparse tag: 0x%08x\n",
2970 __func__
, le32_to_cpu(buf
->ReparseTag
));
2975 static int smb2_parse_reparse_point(struct cifs_sb_info
*cifs_sb
,
2976 struct kvec
*rsp_iov
,
2977 struct cifs_open_info_data
*data
)
2979 struct reparse_data_buffer
*buf
;
2980 struct smb2_ioctl_rsp
*io
= rsp_iov
->iov_base
;
2981 u32 plen
= le32_to_cpu(io
->OutputCount
);
2983 buf
= (struct reparse_data_buffer
*)((u8
*)io
+
2984 le32_to_cpu(io
->OutputOffset
));
2985 return parse_reparse_point(buf
, plen
, cifs_sb
, true, data
);
2988 static int smb2_query_reparse_point(const unsigned int xid
,
2989 struct cifs_tcon
*tcon
,
2990 struct cifs_sb_info
*cifs_sb
,
2991 const char *full_path
,
2992 u32
*tag
, struct kvec
*rsp
,
2995 struct smb2_compound_vars
*vars
;
2997 __le16
*utf16_path
= NULL
;
2998 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2999 struct cifs_open_parms oparms
;
3000 struct cifs_fid fid
;
3001 struct TCP_Server_Info
*server
= cifs_pick_channel(tcon
->ses
);
3002 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
3003 struct smb_rqst
*rqst
;
3004 int resp_buftype
[3];
3005 struct kvec
*rsp_iov
;
3006 struct smb2_ioctl_rsp
*ioctl_rsp
;
3007 struct reparse_data_buffer
*reparse_buf
;
3008 u32 off
, count
, len
;
3010 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, full_path
);
3012 if (smb3_encryption_required(tcon
))
3013 flags
|= CIFS_TRANSFORM_REQ
;
3015 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
3019 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
3020 vars
= kzalloc(sizeof(*vars
), GFP_KERNEL
);
3026 rsp_iov
= vars
->rsp_iov
;
3029 * setup smb2open - TODO add optimization to call cifs_get_readable_path
3030 * to see if there is a handle already open that we can use
3032 rqst
[0].rq_iov
= vars
->open_iov
;
3033 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
3035 oparms
= (struct cifs_open_parms
) {
3038 .desired_access
= FILE_READ_ATTRIBUTES
,
3039 .disposition
= FILE_OPEN
,
3040 .create_options
= cifs_create_options(cifs_sb
, OPEN_REPARSE_POINT
),
3044 rc
= SMB2_open_init(tcon
, server
,
3045 &rqst
[0], &oplock
, &oparms
, utf16_path
);
3048 smb2_set_next_command(tcon
, &rqst
[0]);
3052 rqst
[1].rq_iov
= vars
->io_iov
;
3053 rqst
[1].rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
3055 rc
= SMB2_ioctl_init(tcon
, server
,
3056 &rqst
[1], COMPOUND_FID
,
3057 COMPOUND_FID
, FSCTL_GET_REPARSE_POINT
, NULL
, 0,
3059 MAX_SMB2_CREATE_RESPONSE_SIZE
-
3060 MAX_SMB2_CLOSE_RESPONSE_SIZE
);
3064 smb2_set_next_command(tcon
, &rqst
[1]);
3065 smb2_set_related(&rqst
[1]);
3068 rqst
[2].rq_iov
= &vars
->close_iov
;
3069 rqst
[2].rq_nvec
= 1;
3071 rc
= SMB2_close_init(tcon
, server
,
3072 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
3076 smb2_set_related(&rqst
[2]);
3078 rc
= compound_send_recv(xid
, tcon
->ses
, server
,
3080 resp_buftype
, rsp_iov
);
3082 ioctl_rsp
= rsp_iov
[1].iov_base
;
3085 * Open was successful and we got an ioctl response.
3088 /* See MS-FSCC 2.3.23 */
3089 off
= le32_to_cpu(ioctl_rsp
->OutputOffset
);
3090 count
= le32_to_cpu(ioctl_rsp
->OutputCount
);
3091 if (check_add_overflow(off
, count
, &len
) ||
3092 len
> rsp_iov
[1].iov_len
) {
3093 cifs_tcon_dbg(VFS
, "%s: invalid ioctl: off=%d count=%d\n",
3094 __func__
, off
, count
);
3099 reparse_buf
= (void *)((u8
*)ioctl_rsp
+ off
);
3100 len
= sizeof(*reparse_buf
);
3102 count
< le16_to_cpu(reparse_buf
->ReparseDataLength
) + len
) {
3103 cifs_tcon_dbg(VFS
, "%s: invalid ioctl: off=%d count=%d\n",
3104 __func__
, off
, count
);
3108 *tag
= le32_to_cpu(reparse_buf
->ReparseTag
);
3110 *rsp_buftype
= resp_buftype
[1];
3111 resp_buftype
[1] = CIFS_NO_BUFFER
;
3115 SMB2_open_free(&rqst
[0]);
3116 SMB2_ioctl_free(&rqst
[1]);
3117 SMB2_close_free(&rqst
[2]);
3118 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
3119 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
3120 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
3127 static struct cifs_ntsd
*
3128 get_smb2_acl_by_fid(struct cifs_sb_info
*cifs_sb
,
3129 const struct cifs_fid
*cifsfid
, u32
*pacllen
, u32 info
)
3131 struct cifs_ntsd
*pntsd
= NULL
;
3133 int rc
= -EOPNOTSUPP
;
3134 struct tcon_link
*tlink
= cifs_sb_tlink(cifs_sb
);
3137 return ERR_CAST(tlink
);
3140 cifs_dbg(FYI
, "trying to get acl\n");
3142 rc
= SMB2_query_acl(xid
, tlink_tcon(tlink
), cifsfid
->persistent_fid
,
3143 cifsfid
->volatile_fid
, (void **)&pntsd
, pacllen
,
3147 cifs_put_tlink(tlink
);
3149 cifs_dbg(FYI
, "%s: rc = %d ACL len %d\n", __func__
, rc
, *pacllen
);
3156 static struct cifs_ntsd
*
3157 get_smb2_acl_by_path(struct cifs_sb_info
*cifs_sb
,
3158 const char *path
, u32
*pacllen
, u32 info
)
3160 struct cifs_ntsd
*pntsd
= NULL
;
3161 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
3164 struct cifs_tcon
*tcon
;
3165 struct tcon_link
*tlink
= cifs_sb_tlink(cifs_sb
);
3166 struct cifs_fid fid
;
3167 struct cifs_open_parms oparms
;
3170 cifs_dbg(FYI
, "get smb3 acl for path %s\n", path
);
3172 return ERR_CAST(tlink
);
3174 tcon
= tlink_tcon(tlink
);
3177 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
3184 oparms
= (struct cifs_open_parms
) {
3187 .desired_access
= READ_CONTROL
,
3188 .disposition
= FILE_OPEN
,
3190 * When querying an ACL, even if the file is a symlink
3191 * we want to open the source not the target, and so
3192 * the protocol requires that the client specify this
3193 * flag when opening a reparse point
3195 .create_options
= cifs_create_options(cifs_sb
, 0) |
3200 if (info
& SACL_SECINFO
)
3201 oparms
.desired_access
|= SYSTEM_SECURITY
;
3203 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
, NULL
,
3207 rc
= SMB2_query_acl(xid
, tlink_tcon(tlink
), fid
.persistent_fid
,
3208 fid
.volatile_fid
, (void **)&pntsd
, pacllen
,
3210 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
3213 cifs_put_tlink(tlink
);
3216 cifs_dbg(FYI
, "%s: rc = %d ACL len %d\n", __func__
, rc
, *pacllen
);
3223 set_smb2_acl(struct cifs_ntsd
*pnntsd
, __u32 acllen
,
3224 struct inode
*inode
, const char *path
, int aclflag
)
3226 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
3228 int rc
, access_flags
= 0;
3229 struct cifs_tcon
*tcon
;
3230 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
3231 struct tcon_link
*tlink
= cifs_sb_tlink(cifs_sb
);
3232 struct cifs_fid fid
;
3233 struct cifs_open_parms oparms
;
3236 cifs_dbg(FYI
, "set smb3 acl for path %s\n", path
);
3238 return PTR_ERR(tlink
);
3240 tcon
= tlink_tcon(tlink
);
3243 if (aclflag
& CIFS_ACL_OWNER
|| aclflag
& CIFS_ACL_GROUP
)
3244 access_flags
|= WRITE_OWNER
;
3245 if (aclflag
& CIFS_ACL_SACL
)
3246 access_flags
|= SYSTEM_SECURITY
;
3247 if (aclflag
& CIFS_ACL_DACL
)
3248 access_flags
|= WRITE_DAC
;
3250 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
3257 oparms
= (struct cifs_open_parms
) {
3259 .desired_access
= access_flags
,
3260 .create_options
= cifs_create_options(cifs_sb
, 0),
3261 .disposition
= FILE_OPEN
,
3266 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
,
3270 rc
= SMB2_set_acl(xid
, tlink_tcon(tlink
), fid
.persistent_fid
,
3271 fid
.volatile_fid
, pnntsd
, acllen
, aclflag
);
3272 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
3275 cifs_put_tlink(tlink
);
3280 /* Retrieve an ACL from the server */
3281 static struct cifs_ntsd
*
3282 get_smb2_acl(struct cifs_sb_info
*cifs_sb
,
3283 struct inode
*inode
, const char *path
,
3284 u32
*pacllen
, u32 info
)
3286 struct cifs_ntsd
*pntsd
= NULL
;
3287 struct cifsFileInfo
*open_file
= NULL
;
3289 if (inode
&& !(info
& SACL_SECINFO
))
3290 open_file
= find_readable_file(CIFS_I(inode
), true);
3291 if (!open_file
|| (info
& SACL_SECINFO
))
3292 return get_smb2_acl_by_path(cifs_sb
, path
, pacllen
, info
);
3294 pntsd
= get_smb2_acl_by_fid(cifs_sb
, &open_file
->fid
, pacllen
, info
);
3295 cifsFileInfo_put(open_file
);
3299 static long smb3_zero_data(struct file
*file
, struct cifs_tcon
*tcon
,
3300 loff_t offset
, loff_t len
, unsigned int xid
)
3302 struct cifsFileInfo
*cfile
= file
->private_data
;
3303 struct file_zero_data_information fsctl_buf
;
3305 cifs_dbg(FYI
, "Offset %lld len %lld\n", offset
, len
);
3307 fsctl_buf
.FileOffset
= cpu_to_le64(offset
);
3308 fsctl_buf
.BeyondFinalZero
= cpu_to_le64(offset
+ len
);
3310 return SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3311 cfile
->fid
.volatile_fid
, FSCTL_SET_ZERO_DATA
,
3313 sizeof(struct file_zero_data_information
),
3317 static long smb3_zero_range(struct file
*file
, struct cifs_tcon
*tcon
,
3318 loff_t offset
, loff_t len
, bool keep_size
)
3320 struct cifs_ses
*ses
= tcon
->ses
;
3321 struct inode
*inode
= file_inode(file
);
3322 struct cifsInodeInfo
*cifsi
= CIFS_I(inode
);
3323 struct cifsFileInfo
*cfile
= file
->private_data
;
3324 unsigned long long new_size
;
3331 trace_smb3_zero_enter(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3332 ses
->Suid
, offset
, len
);
3335 filemap_invalidate_lock(inode
->i_mapping
);
3338 * We zero the range through ioctl, so we need remove the page caches
3339 * first, otherwise the data may be inconsistent with the server.
3341 truncate_pagecache_range(inode
, offset
, offset
+ len
- 1);
3343 /* if file not oplocked can't be sure whether asking to extend size */
3345 if (keep_size
== false && !CIFS_CACHE_READ(cifsi
))
3346 goto zero_range_exit
;
3348 rc
= smb3_zero_data(file
, tcon
, offset
, len
, xid
);
3350 goto zero_range_exit
;
3353 * do we also need to change the size of the file?
3355 new_size
= offset
+ len
;
3356 if (keep_size
== false && (unsigned long long)i_size_read(inode
) < new_size
) {
3357 eof
= cpu_to_le64(new_size
);
3358 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3359 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3361 truncate_setsize(inode
, new_size
);
3362 fscache_resize_cookie(cifs_inode_cookie(inode
), new_size
);
3367 filemap_invalidate_unlock(inode
->i_mapping
);
3368 inode_unlock(inode
);
3371 trace_smb3_zero_err(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3372 ses
->Suid
, offset
, len
, rc
);
3374 trace_smb3_zero_done(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3375 ses
->Suid
, offset
, len
);
3379 static long smb3_punch_hole(struct file
*file
, struct cifs_tcon
*tcon
,
3380 loff_t offset
, loff_t len
)
3382 struct inode
*inode
= file_inode(file
);
3383 struct cifsFileInfo
*cfile
= file
->private_data
;
3384 struct file_zero_data_information fsctl_buf
;
3387 __u8 set_sparse
= 1;
3392 /* Need to make file sparse, if not already, before freeing range. */
3393 /* Consider adding equivalent for compressed since it could also work */
3394 if (!smb2_set_sparse(xid
, tcon
, cfile
, inode
, set_sparse
)) {
3399 filemap_invalidate_lock(inode
->i_mapping
);
3401 * We implement the punch hole through ioctl, so we need remove the page
3402 * caches first, otherwise the data may be inconsistent with the server.
3404 truncate_pagecache_range(inode
, offset
, offset
+ len
- 1);
3406 cifs_dbg(FYI
, "Offset %lld len %lld\n", offset
, len
);
3408 fsctl_buf
.FileOffset
= cpu_to_le64(offset
);
3409 fsctl_buf
.BeyondFinalZero
= cpu_to_le64(offset
+ len
);
3411 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3412 cfile
->fid
.volatile_fid
, FSCTL_SET_ZERO_DATA
,
3414 sizeof(struct file_zero_data_information
),
3415 CIFSMaxBufSize
, NULL
, NULL
);
3416 filemap_invalidate_unlock(inode
->i_mapping
);
3418 inode_unlock(inode
);
3423 static int smb3_simple_fallocate_write_range(unsigned int xid
,
3424 struct cifs_tcon
*tcon
,
3425 struct cifsFileInfo
*cfile
,
3426 loff_t off
, loff_t len
,
3429 struct cifs_io_parms io_parms
= {0};
3434 io_parms
.netfid
= cfile
->fid
.netfid
;
3435 io_parms
.pid
= current
->tgid
;
3436 io_parms
.tcon
= tcon
;
3437 io_parms
.persistent_fid
= cfile
->fid
.persistent_fid
;
3438 io_parms
.volatile_fid
= cfile
->fid
.volatile_fid
;
3441 io_parms
.offset
= off
;
3442 io_parms
.length
= len
;
3443 if (io_parms
.length
> SMB2_MAX_BUFFER_SIZE
)
3444 io_parms
.length
= SMB2_MAX_BUFFER_SIZE
;
3445 /* iov[0] is reserved for smb header */
3446 iov
[1].iov_base
= buf
;
3447 iov
[1].iov_len
= io_parms
.length
;
3448 rc
= SMB2_write(xid
, &io_parms
, &nbytes
, iov
, 1);
3460 static int smb3_simple_fallocate_range(unsigned int xid
,
3461 struct cifs_tcon
*tcon
,
3462 struct cifsFileInfo
*cfile
,
3463 loff_t off
, loff_t len
)
3465 struct file_allocated_range_buffer in_data
, *out_data
= NULL
, *tmp_data
;
3471 in_data
.file_offset
= cpu_to_le64(off
);
3472 in_data
.length
= cpu_to_le64(len
);
3473 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3474 cfile
->fid
.volatile_fid
,
3475 FSCTL_QUERY_ALLOCATED_RANGES
,
3476 (char *)&in_data
, sizeof(in_data
),
3477 1024 * sizeof(struct file_allocated_range_buffer
),
3478 (char **)&out_data
, &out_data_len
);
3482 buf
= kzalloc(1024 * 1024, GFP_KERNEL
);
3488 tmp_data
= out_data
;
3491 * The rest of the region is unmapped so write it all.
3493 if (out_data_len
== 0) {
3494 rc
= smb3_simple_fallocate_write_range(xid
, tcon
,
3495 cfile
, off
, len
, buf
);
3499 if (out_data_len
< sizeof(struct file_allocated_range_buffer
)) {
3504 if (off
< le64_to_cpu(tmp_data
->file_offset
)) {
3506 * We are at a hole. Write until the end of the region
3507 * or until the next allocated data,
3508 * whichever comes next.
3510 l
= le64_to_cpu(tmp_data
->file_offset
) - off
;
3513 rc
= smb3_simple_fallocate_write_range(xid
, tcon
,
3514 cfile
, off
, l
, buf
);
3523 * We are at a section of allocated data, just skip forward
3524 * until the end of the data or the end of the region
3525 * we are supposed to fallocate, whichever comes first.
3527 l
= le64_to_cpu(tmp_data
->length
);
3533 tmp_data
= &tmp_data
[1];
3534 out_data_len
-= sizeof(struct file_allocated_range_buffer
);
3544 static long smb3_simple_falloc(struct file
*file
, struct cifs_tcon
*tcon
,
3545 loff_t off
, loff_t len
, bool keep_size
)
3547 struct inode
*inode
;
3548 struct cifsInodeInfo
*cifsi
;
3549 struct cifsFileInfo
*cfile
= file
->private_data
;
3550 long rc
= -EOPNOTSUPP
;
3556 inode
= d_inode(cfile
->dentry
);
3557 cifsi
= CIFS_I(inode
);
3559 trace_smb3_falloc_enter(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3560 tcon
->ses
->Suid
, off
, len
);
3561 /* if file not oplocked can't be sure whether asking to extend size */
3562 if (!CIFS_CACHE_READ(cifsi
))
3563 if (keep_size
== false) {
3564 trace_smb3_falloc_err(xid
, cfile
->fid
.persistent_fid
,
3565 tcon
->tid
, tcon
->ses
->Suid
, off
, len
, rc
);
3571 * Extending the file
3573 if ((keep_size
== false) && i_size_read(inode
) < off
+ len
) {
3574 rc
= inode_newsize_ok(inode
, off
+ len
);
3578 if (cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
)
3579 smb2_set_sparse(xid
, tcon
, cfile
, inode
, false);
3581 eof
= cpu_to_le64(off
+ len
);
3582 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3583 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3585 cifsi
->server_eof
= off
+ len
;
3586 cifs_setsize(inode
, off
+ len
);
3587 cifs_truncate_page(inode
->i_mapping
, inode
->i_size
);
3588 truncate_setsize(inode
, off
+ len
);
3594 * Files are non-sparse by default so falloc may be a no-op
3595 * Must check if file sparse. If not sparse, and since we are not
3596 * extending then no need to do anything since file already allocated
3598 if ((cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) == 0) {
3603 if (keep_size
== true) {
3605 * We can not preallocate pages beyond the end of the file
3608 if (off
>= i_size_read(inode
)) {
3613 * For fallocates that are partially beyond the end of file,
3614 * clamp len so we only fallocate up to the end of file.
3616 if (off
+ len
> i_size_read(inode
)) {
3617 len
= i_size_read(inode
) - off
;
3621 if ((keep_size
== true) || (i_size_read(inode
) >= off
+ len
)) {
3623 * At this point, we are trying to fallocate an internal
3624 * regions of a sparse file. Since smb2 does not have a
3625 * fallocate command we have two otions on how to emulate this.
3626 * We can either turn the entire file to become non-sparse
3627 * which we only do if the fallocate is for virtually
3628 * the whole file, or we can overwrite the region with zeroes
3629 * using SMB2_write, which could be prohibitevly expensive
3633 * We are only trying to fallocate a small region so
3634 * just write it with zero.
3636 if (len
<= 1024 * 1024) {
3637 rc
= smb3_simple_fallocate_range(xid
, tcon
, cfile
,
3643 * Check if falloc starts within first few pages of file
3644 * and ends within a few pages of the end of file to
3645 * ensure that most of file is being forced to be
3646 * fallocated now. If so then setting whole file sparse
3647 * ie potentially making a few extra pages at the beginning
3648 * or end of the file non-sparse via set_sparse is harmless.
3650 if ((off
> 8192) || (off
+ len
+ 8192 < i_size_read(inode
))) {
3656 smb2_set_sparse(xid
, tcon
, cfile
, inode
, false);
3661 trace_smb3_falloc_err(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3662 tcon
->ses
->Suid
, off
, len
, rc
);
3664 trace_smb3_falloc_done(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3665 tcon
->ses
->Suid
, off
, len
);
3671 static long smb3_collapse_range(struct file
*file
, struct cifs_tcon
*tcon
,
3672 loff_t off
, loff_t len
)
3676 struct inode
*inode
= file_inode(file
);
3677 struct cifsFileInfo
*cfile
= file
->private_data
;
3678 struct cifsInodeInfo
*cifsi
= CIFS_I(inode
);
3686 old_eof
= i_size_read(inode
);
3687 if ((off
>= old_eof
) ||
3688 off
+ len
>= old_eof
) {
3693 filemap_invalidate_lock(inode
->i_mapping
);
3694 rc
= filemap_write_and_wait_range(inode
->i_mapping
, off
, old_eof
- 1);
3698 truncate_pagecache_range(inode
, off
, old_eof
);
3700 rc
= smb2_copychunk_range(xid
, cfile
, cfile
, off
+ len
,
3701 old_eof
- off
- len
, off
);
3705 eof
= cpu_to_le64(old_eof
- len
);
3706 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3707 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3713 cifsi
->server_eof
= i_size_read(inode
) - len
;
3714 truncate_setsize(inode
, cifsi
->server_eof
);
3715 fscache_resize_cookie(cifs_inode_cookie(inode
), cifsi
->server_eof
);
3717 filemap_invalidate_unlock(inode
->i_mapping
);
3719 inode_unlock(inode
);
3724 static long smb3_insert_range(struct file
*file
, struct cifs_tcon
*tcon
,
3725 loff_t off
, loff_t len
)
3729 struct cifsFileInfo
*cfile
= file
->private_data
;
3730 struct inode
*inode
= file_inode(file
);
3732 __u64 count
, old_eof
;
3738 old_eof
= i_size_read(inode
);
3739 if (off
>= old_eof
) {
3744 count
= old_eof
- off
;
3745 eof
= cpu_to_le64(old_eof
+ len
);
3747 filemap_invalidate_lock(inode
->i_mapping
);
3748 rc
= filemap_write_and_wait_range(inode
->i_mapping
, off
, old_eof
+ len
- 1);
3751 truncate_pagecache_range(inode
, off
, old_eof
);
3753 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3754 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3758 truncate_setsize(inode
, old_eof
+ len
);
3759 fscache_resize_cookie(cifs_inode_cookie(inode
), i_size_read(inode
));
3761 rc
= smb2_copychunk_range(xid
, cfile
, cfile
, off
, count
, off
+ len
);
3765 rc
= smb3_zero_data(file
, tcon
, off
, len
, xid
);
3771 filemap_invalidate_unlock(inode
->i_mapping
);
3773 inode_unlock(inode
);
3778 static loff_t
smb3_llseek(struct file
*file
, struct cifs_tcon
*tcon
, loff_t offset
, int whence
)
3780 struct cifsFileInfo
*wrcfile
, *cfile
= file
->private_data
;
3781 struct cifsInodeInfo
*cifsi
;
3782 struct inode
*inode
;
3784 struct file_allocated_range_buffer in_data
, *out_data
= NULL
;
3788 if (whence
!= SEEK_HOLE
&& whence
!= SEEK_DATA
)
3789 return generic_file_llseek(file
, offset
, whence
);
3791 inode
= d_inode(cfile
->dentry
);
3792 cifsi
= CIFS_I(inode
);
3794 if (offset
< 0 || offset
>= i_size_read(inode
))
3799 * We need to be sure that all dirty pages are written as they
3800 * might fill holes on the server.
3801 * Note that we also MUST flush any written pages since at least
3802 * some servers (Windows2016) will not reflect recent writes in
3803 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3805 wrcfile
= find_writable_file(cifsi
, FIND_WR_ANY
);
3807 filemap_write_and_wait(inode
->i_mapping
);
3808 smb2_flush_file(xid
, tcon
, &wrcfile
->fid
);
3809 cifsFileInfo_put(wrcfile
);
3812 if (!(cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
)) {
3813 if (whence
== SEEK_HOLE
)
3814 offset
= i_size_read(inode
);
3818 in_data
.file_offset
= cpu_to_le64(offset
);
3819 in_data
.length
= cpu_to_le64(i_size_read(inode
));
3821 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3822 cfile
->fid
.volatile_fid
,
3823 FSCTL_QUERY_ALLOCATED_RANGES
,
3824 (char *)&in_data
, sizeof(in_data
),
3825 sizeof(struct file_allocated_range_buffer
),
3826 (char **)&out_data
, &out_data_len
);
3832 if (whence
== SEEK_HOLE
&& out_data_len
== 0)
3835 if (whence
== SEEK_DATA
&& out_data_len
== 0) {
3840 if (out_data_len
< sizeof(struct file_allocated_range_buffer
)) {
3844 if (whence
== SEEK_DATA
) {
3845 offset
= le64_to_cpu(out_data
->file_offset
);
3848 if (offset
< le64_to_cpu(out_data
->file_offset
))
3851 offset
= le64_to_cpu(out_data
->file_offset
) + le64_to_cpu(out_data
->length
);
3857 return vfs_setpos(file
, offset
, inode
->i_sb
->s_maxbytes
);
3862 static int smb3_fiemap(struct cifs_tcon
*tcon
,
3863 struct cifsFileInfo
*cfile
,
3864 struct fiemap_extent_info
*fei
, u64 start
, u64 len
)
3867 struct file_allocated_range_buffer in_data
, *out_data
;
3869 int i
, num
, rc
, flags
, last_blob
;
3872 rc
= fiemap_prep(d_inode(cfile
->dentry
), fei
, start
, &len
, 0);
3878 in_data
.file_offset
= cpu_to_le64(start
);
3879 in_data
.length
= cpu_to_le64(len
);
3881 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3882 cfile
->fid
.volatile_fid
,
3883 FSCTL_QUERY_ALLOCATED_RANGES
,
3884 (char *)&in_data
, sizeof(in_data
),
3885 1024 * sizeof(struct file_allocated_range_buffer
),
3886 (char **)&out_data
, &out_data_len
);
3895 if (out_data_len
&& out_data_len
< sizeof(struct file_allocated_range_buffer
)) {
3899 if (out_data_len
% sizeof(struct file_allocated_range_buffer
)) {
3904 num
= out_data_len
/ sizeof(struct file_allocated_range_buffer
);
3905 for (i
= 0; i
< num
; i
++) {
3907 if (i
== num
- 1 && last_blob
)
3908 flags
|= FIEMAP_EXTENT_LAST
;
3910 rc
= fiemap_fill_next_extent(fei
,
3911 le64_to_cpu(out_data
[i
].file_offset
),
3912 le64_to_cpu(out_data
[i
].file_offset
),
3913 le64_to_cpu(out_data
[i
].length
),
3924 next
= le64_to_cpu(out_data
[num
- 1].file_offset
) +
3925 le64_to_cpu(out_data
[num
- 1].length
);
3926 len
= len
- (next
- start
);
3937 static long smb3_fallocate(struct file
*file
, struct cifs_tcon
*tcon
, int mode
,
3938 loff_t off
, loff_t len
)
3940 /* KEEP_SIZE already checked for by do_fallocate */
3941 if (mode
& FALLOC_FL_PUNCH_HOLE
)
3942 return smb3_punch_hole(file
, tcon
, off
, len
);
3943 else if (mode
& FALLOC_FL_ZERO_RANGE
) {
3944 if (mode
& FALLOC_FL_KEEP_SIZE
)
3945 return smb3_zero_range(file
, tcon
, off
, len
, true);
3946 return smb3_zero_range(file
, tcon
, off
, len
, false);
3947 } else if (mode
== FALLOC_FL_KEEP_SIZE
)
3948 return smb3_simple_falloc(file
, tcon
, off
, len
, true);
3949 else if (mode
== FALLOC_FL_COLLAPSE_RANGE
)
3950 return smb3_collapse_range(file
, tcon
, off
, len
);
3951 else if (mode
== FALLOC_FL_INSERT_RANGE
)
3952 return smb3_insert_range(file
, tcon
, off
, len
);
3954 return smb3_simple_falloc(file
, tcon
, off
, len
, false);
3960 smb2_downgrade_oplock(struct TCP_Server_Info
*server
,
3961 struct cifsInodeInfo
*cinode
, __u32 oplock
,
3962 unsigned int epoch
, bool *purge_cache
)
3964 server
->ops
->set_oplock_level(cinode
, oplock
, 0, NULL
);
3968 smb21_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
3969 unsigned int epoch
, bool *purge_cache
);
3972 smb3_downgrade_oplock(struct TCP_Server_Info
*server
,
3973 struct cifsInodeInfo
*cinode
, __u32 oplock
,
3974 unsigned int epoch
, bool *purge_cache
)
3976 unsigned int old_state
= cinode
->oplock
;
3977 unsigned int old_epoch
= cinode
->epoch
;
3978 unsigned int new_state
;
3980 if (epoch
> old_epoch
) {
3981 smb21_set_oplock_level(cinode
, oplock
, 0, NULL
);
3982 cinode
->epoch
= epoch
;
3985 new_state
= cinode
->oplock
;
3986 *purge_cache
= false;
3988 if ((old_state
& CIFS_CACHE_READ_FLG
) != 0 &&
3989 (new_state
& CIFS_CACHE_READ_FLG
) == 0)
3990 *purge_cache
= true;
3991 else if (old_state
== new_state
&& (epoch
- old_epoch
> 1))
3992 *purge_cache
= true;
3996 smb2_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
3997 unsigned int epoch
, bool *purge_cache
)
4000 cinode
->lease_granted
= false;
4001 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
4003 if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
4004 cinode
->oplock
= CIFS_CACHE_RHW_FLG
;
4005 cifs_dbg(FYI
, "Batch Oplock granted on inode %p\n",
4006 &cinode
->netfs
.inode
);
4007 } else if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
) {
4008 cinode
->oplock
= CIFS_CACHE_RW_FLG
;
4009 cifs_dbg(FYI
, "Exclusive Oplock granted on inode %p\n",
4010 &cinode
->netfs
.inode
);
4011 } else if (oplock
== SMB2_OPLOCK_LEVEL_II
) {
4012 cinode
->oplock
= CIFS_CACHE_READ_FLG
;
4013 cifs_dbg(FYI
, "Level II Oplock granted on inode %p\n",
4014 &cinode
->netfs
.inode
);
4020 smb21_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
4021 unsigned int epoch
, bool *purge_cache
)
4023 char message
[5] = {0};
4024 unsigned int new_oplock
= 0;
4027 cinode
->lease_granted
= true;
4028 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
4031 /* Check if the server granted an oplock rather than a lease */
4032 if (oplock
& SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
4033 return smb2_set_oplock_level(cinode
, oplock
, epoch
,
4036 if (oplock
& SMB2_LEASE_READ_CACHING_HE
) {
4037 new_oplock
|= CIFS_CACHE_READ_FLG
;
4038 strcat(message
, "R");
4040 if (oplock
& SMB2_LEASE_HANDLE_CACHING_HE
) {
4041 new_oplock
|= CIFS_CACHE_HANDLE_FLG
;
4042 strcat(message
, "H");
4044 if (oplock
& SMB2_LEASE_WRITE_CACHING_HE
) {
4045 new_oplock
|= CIFS_CACHE_WRITE_FLG
;
4046 strcat(message
, "W");
4049 strncpy(message
, "None", sizeof(message
));
4051 cinode
->oplock
= new_oplock
;
4052 cifs_dbg(FYI
, "%s Lease granted on inode %p\n", message
,
4053 &cinode
->netfs
.inode
);
4057 smb3_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
4058 unsigned int epoch
, bool *purge_cache
)
4060 unsigned int old_oplock
= cinode
->oplock
;
4062 smb21_set_oplock_level(cinode
, oplock
, epoch
, purge_cache
);
4065 *purge_cache
= false;
4066 if (old_oplock
== CIFS_CACHE_READ_FLG
) {
4067 if (cinode
->oplock
== CIFS_CACHE_READ_FLG
&&
4068 (epoch
- cinode
->epoch
> 0))
4069 *purge_cache
= true;
4070 else if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
4071 (epoch
- cinode
->epoch
> 1))
4072 *purge_cache
= true;
4073 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
4074 (epoch
- cinode
->epoch
> 1))
4075 *purge_cache
= true;
4076 else if (cinode
->oplock
== 0 &&
4077 (epoch
- cinode
->epoch
> 0))
4078 *purge_cache
= true;
4079 } else if (old_oplock
== CIFS_CACHE_RH_FLG
) {
4080 if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
4081 (epoch
- cinode
->epoch
> 0))
4082 *purge_cache
= true;
4083 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
4084 (epoch
- cinode
->epoch
> 1))
4085 *purge_cache
= true;
4087 cinode
->epoch
= epoch
;
4091 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4093 smb2_is_read_op(__u32 oplock
)
4095 return oplock
== SMB2_OPLOCK_LEVEL_II
;
4097 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4100 smb21_is_read_op(__u32 oplock
)
4102 return (oplock
& SMB2_LEASE_READ_CACHING_HE
) &&
4103 !(oplock
& SMB2_LEASE_WRITE_CACHING_HE
);
4107 map_oplock_to_lease(u8 oplock
)
4109 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
4110 return SMB2_LEASE_WRITE_CACHING_LE
| SMB2_LEASE_READ_CACHING_LE
;
4111 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
4112 return SMB2_LEASE_READ_CACHING_LE
;
4113 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
4114 return SMB2_LEASE_HANDLE_CACHING_LE
| SMB2_LEASE_READ_CACHING_LE
|
4115 SMB2_LEASE_WRITE_CACHING_LE
;
4120 smb2_create_lease_buf(u8
*lease_key
, u8 oplock
)
4122 struct create_lease
*buf
;
4124 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
4128 memcpy(&buf
->lcontext
.LeaseKey
, lease_key
, SMB2_LEASE_KEY_SIZE
);
4129 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
4131 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
4132 (struct create_lease
, lcontext
));
4133 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
4134 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
4135 (struct create_lease
, Name
));
4136 buf
->ccontext
.NameLength
= cpu_to_le16(4);
4137 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4146 smb3_create_lease_buf(u8
*lease_key
, u8 oplock
)
4148 struct create_lease_v2
*buf
;
4150 buf
= kzalloc(sizeof(struct create_lease_v2
), GFP_KERNEL
);
4154 memcpy(&buf
->lcontext
.LeaseKey
, lease_key
, SMB2_LEASE_KEY_SIZE
);
4155 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
4157 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
4158 (struct create_lease_v2
, lcontext
));
4159 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context_v2
));
4160 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
4161 (struct create_lease_v2
, Name
));
4162 buf
->ccontext
.NameLength
= cpu_to_le16(4);
4163 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4172 smb2_parse_lease_buf(void *buf
, unsigned int *epoch
, char *lease_key
)
4174 struct create_lease
*lc
= (struct create_lease
*)buf
;
4176 *epoch
= 0; /* not used */
4177 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE
)
4178 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
4179 return le32_to_cpu(lc
->lcontext
.LeaseState
);
4183 smb3_parse_lease_buf(void *buf
, unsigned int *epoch
, char *lease_key
)
4185 struct create_lease_v2
*lc
= (struct create_lease_v2
*)buf
;
4187 *epoch
= le16_to_cpu(lc
->lcontext
.Epoch
);
4188 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE
)
4189 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
4191 memcpy(lease_key
, &lc
->lcontext
.LeaseKey
, SMB2_LEASE_KEY_SIZE
);
4192 return le32_to_cpu(lc
->lcontext
.LeaseState
);
4196 smb2_wp_retry_size(struct inode
*inode
)
4198 return min_t(unsigned int, CIFS_SB(inode
->i_sb
)->ctx
->wsize
,
4199 SMB2_MAX_BUFFER_SIZE
);
4203 smb2_dir_needs_close(struct cifsFileInfo
*cfile
)
4205 return !cfile
->invalidHandle
;
4209 fill_transform_hdr(struct smb2_transform_hdr
*tr_hdr
, unsigned int orig_len
,
4210 struct smb_rqst
*old_rq
, __le16 cipher_type
)
4212 struct smb2_hdr
*shdr
=
4213 (struct smb2_hdr
*)old_rq
->rq_iov
[0].iov_base
;
4215 memset(tr_hdr
, 0, sizeof(struct smb2_transform_hdr
));
4216 tr_hdr
->ProtocolId
= SMB2_TRANSFORM_PROTO_NUM
;
4217 tr_hdr
->OriginalMessageSize
= cpu_to_le32(orig_len
);
4218 tr_hdr
->Flags
= cpu_to_le16(0x01);
4219 if ((cipher_type
== SMB2_ENCRYPTION_AES128_GCM
) ||
4220 (cipher_type
== SMB2_ENCRYPTION_AES256_GCM
))
4221 get_random_bytes(&tr_hdr
->Nonce
, SMB3_AES_GCM_NONCE
);
4223 get_random_bytes(&tr_hdr
->Nonce
, SMB3_AES_CCM_NONCE
);
4224 memcpy(&tr_hdr
->SessionId
, &shdr
->SessionId
, 8);
4227 static void *smb2_aead_req_alloc(struct crypto_aead
*tfm
, const struct smb_rqst
*rqst
,
4228 int num_rqst
, const u8
*sig
, u8
**iv
,
4229 struct aead_request
**req
, struct sg_table
*sgt
,
4230 unsigned int *num_sgs
, size_t *sensitive_size
)
4232 unsigned int req_size
= sizeof(**req
) + crypto_aead_reqsize(tfm
);
4233 unsigned int iv_size
= crypto_aead_ivsize(tfm
);
4237 *num_sgs
= cifs_get_num_sgs(rqst
, num_rqst
, sig
);
4238 if (IS_ERR_VALUE((long)(int)*num_sgs
))
4239 return ERR_PTR(*num_sgs
);
4242 len
+= crypto_aead_alignmask(tfm
) & ~(crypto_tfm_ctx_alignment() - 1);
4243 len
= ALIGN(len
, crypto_tfm_ctx_alignment());
4245 len
= ALIGN(len
, __alignof__(struct scatterlist
));
4246 len
+= array_size(*num_sgs
, sizeof(struct scatterlist
));
4247 *sensitive_size
= len
;
4249 p
= kvzalloc(len
, GFP_NOFS
);
4251 return ERR_PTR(-ENOMEM
);
4253 *iv
= (u8
*)PTR_ALIGN(p
, crypto_aead_alignmask(tfm
) + 1);
4254 *req
= (struct aead_request
*)PTR_ALIGN(*iv
+ iv_size
,
4255 crypto_tfm_ctx_alignment());
4256 sgt
->sgl
= (struct scatterlist
*)PTR_ALIGN((u8
*)*req
+ req_size
,
4257 __alignof__(struct scatterlist
));
4261 static void *smb2_get_aead_req(struct crypto_aead
*tfm
, struct smb_rqst
*rqst
,
4262 int num_rqst
, const u8
*sig
, u8
**iv
,
4263 struct aead_request
**req
, struct scatterlist
**sgl
,
4264 size_t *sensitive_size
)
4266 struct sg_table sgtable
= {};
4267 unsigned int skip
, num_sgs
, i
, j
;
4271 p
= smb2_aead_req_alloc(tfm
, rqst
, num_rqst
, sig
, iv
, req
, &sgtable
,
4272 &num_sgs
, sensitive_size
);
4276 sg_init_marker(sgtable
.sgl
, num_sgs
);
4279 * The first rqst has a transform header where the
4280 * first 20 bytes are not part of the encrypted blob.
4284 for (i
= 0; i
< num_rqst
; i
++) {
4285 struct iov_iter
*iter
= &rqst
[i
].rq_iter
;
4286 size_t count
= iov_iter_count(iter
);
4288 for (j
= 0; j
< rqst
[i
].rq_nvec
; j
++) {
4289 cifs_sg_set_buf(&sgtable
,
4290 rqst
[i
].rq_iov
[j
].iov_base
+ skip
,
4291 rqst
[i
].rq_iov
[j
].iov_len
- skip
);
4293 /* See the above comment on the 'skip' assignment */
4296 sgtable
.orig_nents
= sgtable
.nents
;
4298 rc
= extract_iter_to_sg(iter
, count
, &sgtable
,
4299 num_sgs
- sgtable
.nents
, 0);
4300 iov_iter_revert(iter
, rc
);
4301 sgtable
.orig_nents
= sgtable
.nents
;
4304 cifs_sg_set_buf(&sgtable
, sig
, SMB2_SIGNATURE_SIZE
);
4305 sg_mark_end(&sgtable
.sgl
[sgtable
.nents
- 1]);
4311 smb2_get_enc_key(struct TCP_Server_Info
*server
, __u64 ses_id
, int enc
, u8
*key
)
4313 struct TCP_Server_Info
*pserver
;
4314 struct cifs_ses
*ses
;
4317 /* If server is a channel, select the primary channel */
4318 pserver
= SERVER_IS_CHAN(server
) ? server
->primary_server
: server
;
4320 spin_lock(&cifs_tcp_ses_lock
);
4321 list_for_each_entry(ses
, &pserver
->smb_ses_list
, smb_ses_list
) {
4322 if (ses
->Suid
== ses_id
) {
4323 spin_lock(&ses
->ses_lock
);
4324 ses_enc_key
= enc
? ses
->smb3encryptionkey
:
4325 ses
->smb3decryptionkey
;
4326 memcpy(key
, ses_enc_key
, SMB3_ENC_DEC_KEY_SIZE
);
4327 spin_unlock(&ses
->ses_lock
);
4328 spin_unlock(&cifs_tcp_ses_lock
);
4332 spin_unlock(&cifs_tcp_ses_lock
);
4334 trace_smb3_ses_not_found(ses_id
);
4339 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4340 * iov[0] - transform header (associate data),
4341 * iov[1-N] - SMB2 header and pages - data to encrypt.
4342 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4346 crypt_message(struct TCP_Server_Info
*server
, int num_rqst
,
4347 struct smb_rqst
*rqst
, int enc
)
4349 struct smb2_transform_hdr
*tr_hdr
=
4350 (struct smb2_transform_hdr
*)rqst
[0].rq_iov
[0].iov_base
;
4351 unsigned int assoc_data_len
= sizeof(struct smb2_transform_hdr
) - 20;
4353 struct scatterlist
*sg
;
4354 u8 sign
[SMB2_SIGNATURE_SIZE
] = {};
4355 u8 key
[SMB3_ENC_DEC_KEY_SIZE
];
4356 struct aead_request
*req
;
4358 DECLARE_CRYPTO_WAIT(wait
);
4359 struct crypto_aead
*tfm
;
4360 unsigned int crypt_len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
);
4362 size_t sensitive_size
;
4364 rc
= smb2_get_enc_key(server
, le64_to_cpu(tr_hdr
->SessionId
), enc
, key
);
4366 cifs_server_dbg(FYI
, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__
,
4367 enc
? "en" : "de", le64_to_cpu(tr_hdr
->SessionId
));
4371 rc
= smb3_crypto_aead_allocate(server
);
4373 cifs_server_dbg(VFS
, "%s: crypto alloc failed\n", __func__
);
4377 tfm
= enc
? server
->secmech
.enc
: server
->secmech
.dec
;
4379 if ((server
->cipher_type
== SMB2_ENCRYPTION_AES256_CCM
) ||
4380 (server
->cipher_type
== SMB2_ENCRYPTION_AES256_GCM
))
4381 rc
= crypto_aead_setkey(tfm
, key
, SMB3_GCM256_CRYPTKEY_SIZE
);
4383 rc
= crypto_aead_setkey(tfm
, key
, SMB3_GCM128_CRYPTKEY_SIZE
);
4386 cifs_server_dbg(VFS
, "%s: Failed to set aead key %d\n", __func__
, rc
);
4390 rc
= crypto_aead_setauthsize(tfm
, SMB2_SIGNATURE_SIZE
);
4392 cifs_server_dbg(VFS
, "%s: Failed to set authsize %d\n", __func__
, rc
);
4396 creq
= smb2_get_aead_req(tfm
, rqst
, num_rqst
, sign
, &iv
, &req
, &sg
,
4399 return PTR_ERR(creq
);
4402 memcpy(sign
, &tr_hdr
->Signature
, SMB2_SIGNATURE_SIZE
);
4403 crypt_len
+= SMB2_SIGNATURE_SIZE
;
4406 if ((server
->cipher_type
== SMB2_ENCRYPTION_AES128_GCM
) ||
4407 (server
->cipher_type
== SMB2_ENCRYPTION_AES256_GCM
))
4408 memcpy(iv
, (char *)tr_hdr
->Nonce
, SMB3_AES_GCM_NONCE
);
4411 memcpy(iv
+ 1, (char *)tr_hdr
->Nonce
, SMB3_AES_CCM_NONCE
);
4414 aead_request_set_tfm(req
, tfm
);
4415 aead_request_set_crypt(req
, sg
, sg
, crypt_len
, iv
);
4416 aead_request_set_ad(req
, assoc_data_len
);
4418 aead_request_set_callback(req
, CRYPTO_TFM_REQ_MAY_BACKLOG
,
4419 crypto_req_done
, &wait
);
4421 rc
= crypto_wait_req(enc
? crypto_aead_encrypt(req
)
4422 : crypto_aead_decrypt(req
), &wait
);
4425 memcpy(&tr_hdr
->Signature
, sign
, SMB2_SIGNATURE_SIZE
);
4427 kvfree_sensitive(creq
, sensitive_size
);
4432 * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4434 static void cifs_clear_xarray_buffer(struct xarray
*buffer
)
4436 struct folio
*folio
;
4438 XA_STATE(xas
, buffer
, 0);
4441 xas_for_each_marked(&xas
, folio
, ULONG_MAX
, XA_MARK_0
) {
4449 smb3_free_compound_rqst(int num_rqst
, struct smb_rqst
*rqst
)
4453 for (i
= 0; i
< num_rqst
; i
++)
4454 if (!xa_empty(&rqst
[i
].rq_buffer
))
4455 cifs_clear_xarray_buffer(&rqst
[i
].rq_buffer
);
4459 * This function will initialize new_rq and encrypt the content.
4460 * The first entry, new_rq[0], only contains a single iov which contains
4461 * a smb2_transform_hdr and is pre-allocated by the caller.
4462 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4464 * The end result is an array of smb_rqst structures where the first structure
4465 * only contains a single iov for the transform header which we then can pass
4466 * to crypt_message().
4468 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4469 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4472 smb3_init_transform_rq(struct TCP_Server_Info
*server
, int num_rqst
,
4473 struct smb_rqst
*new_rq
, struct smb_rqst
*old_rq
)
4475 struct smb2_transform_hdr
*tr_hdr
= new_rq
[0].rq_iov
[0].iov_base
;
4477 unsigned int orig_len
= 0;
4481 for (i
= 1; i
< num_rqst
; i
++) {
4482 struct smb_rqst
*old
= &old_rq
[i
- 1];
4483 struct smb_rqst
*new = &new_rq
[i
];
4484 struct xarray
*buffer
= &new->rq_buffer
;
4485 size_t size
= iov_iter_count(&old
->rq_iter
), seg
, copied
= 0;
4487 orig_len
+= smb_rqst_len(server
, old
);
4488 new->rq_iov
= old
->rq_iov
;
4489 new->rq_nvec
= old
->rq_nvec
;
4494 unsigned int npages
= DIV_ROUND_UP(size
, PAGE_SIZE
);
4496 for (j
= 0; j
< npages
; j
++) {
4500 page
= alloc_page(GFP_KERNEL
|__GFP_HIGHMEM
);
4504 o
= xa_store(buffer
, j
, page
, GFP_KERNEL
);
4511 xa_set_mark(buffer
, j
, XA_MARK_0
);
4513 seg
= min_t(size_t, size
- copied
, PAGE_SIZE
);
4514 if (copy_page_from_iter(page
, 0, seg
, &old
->rq_iter
) != seg
) {
4520 iov_iter_xarray(&new->rq_iter
, ITER_SOURCE
,
4522 new->rq_iter_size
= size
;
4526 /* fill the 1st iov with a transform header */
4527 fill_transform_hdr(tr_hdr
, orig_len
, old_rq
, server
->cipher_type
);
4529 rc
= crypt_message(server
, num_rqst
, new_rq
, 1);
4530 cifs_dbg(FYI
, "Encrypt message returned %d\n", rc
);
4537 smb3_free_compound_rqst(num_rqst
- 1, &new_rq
[1]);
4542 smb3_is_transform_hdr(void *buf
)
4544 struct smb2_transform_hdr
*trhdr
= buf
;
4546 return trhdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
;
4550 decrypt_raw_data(struct TCP_Server_Info
*server
, char *buf
,
4551 unsigned int buf_data_size
, struct iov_iter
*iter
,
4555 struct smb_rqst rqst
= {NULL
};
4556 size_t iter_size
= 0;
4559 iov
[0].iov_base
= buf
;
4560 iov
[0].iov_len
= sizeof(struct smb2_transform_hdr
);
4561 iov
[1].iov_base
= buf
+ sizeof(struct smb2_transform_hdr
);
4562 iov
[1].iov_len
= buf_data_size
;
4567 rqst
.rq_iter
= *iter
;
4568 rqst
.rq_iter_size
= iov_iter_count(iter
);
4569 iter_size
= iov_iter_count(iter
);
4572 rc
= crypt_message(server
, 1, &rqst
, 0);
4573 cifs_dbg(FYI
, "Decrypt message returned %d\n", rc
);
4578 memmove(buf
, iov
[1].iov_base
, buf_data_size
);
4581 server
->total_read
= buf_data_size
+ iter_size
;
4587 cifs_copy_pages_to_iter(struct xarray
*pages
, unsigned int data_size
,
4588 unsigned int skip
, struct iov_iter
*iter
)
4591 unsigned long index
;
4593 xa_for_each(pages
, index
, page
) {
4594 size_t n
, len
= min_t(unsigned int, PAGE_SIZE
- skip
, data_size
);
4596 n
= copy_page_to_iter(page
, skip
, len
, iter
);
4598 cifs_dbg(VFS
, "%s: something went wrong\n", __func__
);
4609 handle_read_data(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
,
4610 char *buf
, unsigned int buf_len
, struct xarray
*pages
,
4611 unsigned int pages_len
, bool is_offloaded
)
4613 unsigned int data_offset
;
4614 unsigned int data_len
;
4615 unsigned int cur_off
;
4616 unsigned int cur_page_idx
;
4617 unsigned int pad_len
;
4618 struct cifs_readdata
*rdata
= mid
->callback_data
;
4619 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
4621 bool use_rdma_mr
= false;
4623 if (shdr
->Command
!= SMB2_READ
) {
4624 cifs_server_dbg(VFS
, "only big read responses are supported\n");
4628 if (server
->ops
->is_session_expired
&&
4629 server
->ops
->is_session_expired(buf
)) {
4631 cifs_reconnect(server
, true);
4635 if (server
->ops
->is_status_pending
&&
4636 server
->ops
->is_status_pending(buf
, server
))
4639 /* set up first two iov to get credits */
4640 rdata
->iov
[0].iov_base
= buf
;
4641 rdata
->iov
[0].iov_len
= 0;
4642 rdata
->iov
[1].iov_base
= buf
;
4643 rdata
->iov
[1].iov_len
=
4644 min_t(unsigned int, buf_len
, server
->vals
->read_rsp_size
);
4645 cifs_dbg(FYI
, "0: iov_base=%p iov_len=%zu\n",
4646 rdata
->iov
[0].iov_base
, rdata
->iov
[0].iov_len
);
4647 cifs_dbg(FYI
, "1: iov_base=%p iov_len=%zu\n",
4648 rdata
->iov
[1].iov_base
, rdata
->iov
[1].iov_len
);
4650 rdata
->result
= server
->ops
->map_error(buf
, true);
4651 if (rdata
->result
!= 0) {
4652 cifs_dbg(FYI
, "%s: server returned error %d\n",
4653 __func__
, rdata
->result
);
4654 /* normal error on read response */
4656 mid
->mid_state
= MID_RESPONSE_RECEIVED
;
4658 dequeue_mid(mid
, false);
4662 data_offset
= server
->ops
->read_data_offset(buf
);
4663 #ifdef CONFIG_CIFS_SMB_DIRECT
4664 use_rdma_mr
= rdata
->mr
;
4666 data_len
= server
->ops
->read_data_length(buf
, use_rdma_mr
);
4668 if (data_offset
< server
->vals
->read_rsp_size
) {
4670 * win2k8 sometimes sends an offset of 0 when the read
4671 * is beyond the EOF. Treat it as if the data starts just after
4674 cifs_dbg(FYI
, "%s: data offset (%u) inside read response header\n",
4675 __func__
, data_offset
);
4676 data_offset
= server
->vals
->read_rsp_size
;
4677 } else if (data_offset
> MAX_CIFS_SMALL_BUFFER_SIZE
) {
4678 /* data_offset is beyond the end of smallbuf */
4679 cifs_dbg(FYI
, "%s: data offset (%u) beyond end of smallbuf\n",
4680 __func__
, data_offset
);
4681 rdata
->result
= -EIO
;
4683 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4685 dequeue_mid(mid
, rdata
->result
);
4689 pad_len
= data_offset
- server
->vals
->read_rsp_size
;
4691 if (buf_len
<= data_offset
) {
4692 /* read response payload is in pages */
4693 cur_page_idx
= pad_len
/ PAGE_SIZE
;
4694 cur_off
= pad_len
% PAGE_SIZE
;
4696 if (cur_page_idx
!= 0) {
4697 /* data offset is beyond the 1st page of response */
4698 cifs_dbg(FYI
, "%s: data offset (%u) beyond 1st page of response\n",
4699 __func__
, data_offset
);
4700 rdata
->result
= -EIO
;
4702 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4704 dequeue_mid(mid
, rdata
->result
);
4708 if (data_len
> pages_len
- pad_len
) {
4709 /* data_len is corrupt -- discard frame */
4710 rdata
->result
= -EIO
;
4712 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4714 dequeue_mid(mid
, rdata
->result
);
4718 /* Copy the data to the output I/O iterator. */
4719 rdata
->result
= cifs_copy_pages_to_iter(pages
, pages_len
,
4720 cur_off
, &rdata
->iter
);
4721 if (rdata
->result
!= 0) {
4723 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4725 dequeue_mid(mid
, rdata
->result
);
4728 rdata
->got_bytes
= pages_len
;
4730 } else if (buf_len
>= data_offset
+ data_len
) {
4731 /* read response payload is in buf */
4732 WARN_ONCE(pages
&& !xa_empty(pages
),
4733 "read data can be either in buf or in pages");
4734 length
= copy_to_iter(buf
+ data_offset
, data_len
, &rdata
->iter
);
4737 rdata
->got_bytes
= data_len
;
4739 /* read response payload cannot be in both buf and pages */
4740 WARN_ONCE(1, "buf can not contain only a part of read data");
4741 rdata
->result
= -EIO
;
4743 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4745 dequeue_mid(mid
, rdata
->result
);
4750 mid
->mid_state
= MID_RESPONSE_RECEIVED
;
4752 dequeue_mid(mid
, false);
4756 struct smb2_decrypt_work
{
4757 struct work_struct decrypt
;
4758 struct TCP_Server_Info
*server
;
4759 struct xarray buffer
;
4765 static void smb2_decrypt_offload(struct work_struct
*work
)
4767 struct smb2_decrypt_work
*dw
= container_of(work
,
4768 struct smb2_decrypt_work
, decrypt
);
4770 struct mid_q_entry
*mid
;
4771 struct iov_iter iter
;
4773 iov_iter_xarray(&iter
, ITER_DEST
, &dw
->buffer
, 0, dw
->len
);
4774 rc
= decrypt_raw_data(dw
->server
, dw
->buf
, dw
->server
->vals
->read_rsp_size
,
4777 cifs_dbg(VFS
, "error decrypting rc=%d\n", rc
);
4781 dw
->server
->lstrp
= jiffies
;
4782 mid
= smb2_find_dequeue_mid(dw
->server
, dw
->buf
);
4784 cifs_dbg(FYI
, "mid not found\n");
4786 mid
->decrypted
= true;
4787 rc
= handle_read_data(dw
->server
, mid
, dw
->buf
,
4788 dw
->server
->vals
->read_rsp_size
,
4789 &dw
->buffer
, dw
->len
,
4792 #ifdef CONFIG_CIFS_STATS2
4793 mid
->when_received
= jiffies
;
4795 if (dw
->server
->ops
->is_network_name_deleted
)
4796 dw
->server
->ops
->is_network_name_deleted(dw
->buf
,
4801 spin_lock(&dw
->server
->srv_lock
);
4802 if (dw
->server
->tcpStatus
== CifsNeedReconnect
) {
4803 spin_lock(&dw
->server
->mid_lock
);
4804 mid
->mid_state
= MID_RETRY_NEEDED
;
4805 spin_unlock(&dw
->server
->mid_lock
);
4806 spin_unlock(&dw
->server
->srv_lock
);
4809 spin_lock(&dw
->server
->mid_lock
);
4810 mid
->mid_state
= MID_REQUEST_SUBMITTED
;
4811 mid
->mid_flags
&= ~(MID_DELETED
);
4812 list_add_tail(&mid
->qhead
,
4813 &dw
->server
->pending_mid_q
);
4814 spin_unlock(&dw
->server
->mid_lock
);
4815 spin_unlock(&dw
->server
->srv_lock
);
4822 cifs_clear_xarray_buffer(&dw
->buffer
);
4823 cifs_small_buf_release(dw
->buf
);
4829 receive_encrypted_read(struct TCP_Server_Info
*server
, struct mid_q_entry
**mid
,
4833 char *buf
= server
->smallbuf
;
4834 struct smb2_transform_hdr
*tr_hdr
= (struct smb2_transform_hdr
*)buf
;
4835 struct iov_iter iter
;
4836 unsigned int len
, npages
;
4837 unsigned int buflen
= server
->pdu_size
;
4840 struct smb2_decrypt_work
*dw
;
4842 dw
= kzalloc(sizeof(struct smb2_decrypt_work
), GFP_KERNEL
);
4845 xa_init(&dw
->buffer
);
4846 INIT_WORK(&dw
->decrypt
, smb2_decrypt_offload
);
4847 dw
->server
= server
;
4850 len
= min_t(unsigned int, buflen
, server
->vals
->read_rsp_size
+
4851 sizeof(struct smb2_transform_hdr
)) - HEADER_SIZE(server
) + 1;
4853 rc
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1, len
);
4856 server
->total_read
+= rc
;
4858 len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
) -
4859 server
->vals
->read_rsp_size
;
4861 npages
= DIV_ROUND_UP(len
, PAGE_SIZE
);
4864 for (; i
< npages
; i
++) {
4867 page
= alloc_page(GFP_KERNEL
|__GFP_HIGHMEM
);
4871 old
= xa_store(&dw
->buffer
, i
, page
, GFP_KERNEL
);
4872 if (xa_is_err(old
)) {
4877 xa_set_mark(&dw
->buffer
, i
, XA_MARK_0
);
4880 iov_iter_xarray(&iter
, ITER_DEST
, &dw
->buffer
, 0, npages
* PAGE_SIZE
);
4882 /* Read the data into the buffer and clear excess bufferage. */
4883 rc
= cifs_read_iter_from_socket(server
, &iter
, dw
->len
);
4887 server
->total_read
+= rc
;
4888 if (rc
< npages
* PAGE_SIZE
)
4889 iov_iter_zero(npages
* PAGE_SIZE
- rc
, &iter
);
4890 iov_iter_revert(&iter
, npages
* PAGE_SIZE
);
4891 iov_iter_truncate(&iter
, dw
->len
);
4893 rc
= cifs_discard_remaining_data(server
);
4898 * For large reads, offload to different thread for better performance,
4899 * use more cores decrypting which can be expensive
4902 if ((server
->min_offload
) && (server
->in_flight
> 1) &&
4903 (server
->pdu_size
>= server
->min_offload
)) {
4904 dw
->buf
= server
->smallbuf
;
4905 server
->smallbuf
= (char *)cifs_small_buf_get();
4907 queue_work(decrypt_wq
, &dw
->decrypt
);
4908 *num_mids
= 0; /* worker thread takes care of finding mid */
4912 rc
= decrypt_raw_data(server
, buf
, server
->vals
->read_rsp_size
,
4917 *mid
= smb2_find_mid(server
, buf
);
4919 cifs_dbg(FYI
, "mid not found\n");
4921 cifs_dbg(FYI
, "mid found\n");
4922 (*mid
)->decrypted
= true;
4923 rc
= handle_read_data(server
, *mid
, buf
,
4924 server
->vals
->read_rsp_size
,
4925 &dw
->buffer
, dw
->len
, false);
4927 if (server
->ops
->is_network_name_deleted
) {
4928 server
->ops
->is_network_name_deleted(buf
,
4935 cifs_clear_xarray_buffer(&dw
->buffer
);
4940 cifs_discard_remaining_data(server
);
4945 receive_encrypted_standard(struct TCP_Server_Info
*server
,
4946 struct mid_q_entry
**mids
, char **bufs
,
4950 char *buf
= server
->smallbuf
;
4951 struct smb2_hdr
*shdr
;
4952 unsigned int pdu_length
= server
->pdu_size
;
4953 unsigned int buf_size
;
4954 unsigned int next_cmd
;
4955 struct mid_q_entry
*mid_entry
;
4957 char *next_buffer
= NULL
;
4961 /* switch to large buffer if too big for a small one */
4962 if (pdu_length
> MAX_CIFS_SMALL_BUFFER_SIZE
) {
4963 server
->large_buf
= true;
4964 memcpy(server
->bigbuf
, buf
, server
->total_read
);
4965 buf
= server
->bigbuf
;
4968 /* now read the rest */
4969 length
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1,
4970 pdu_length
- HEADER_SIZE(server
) + 1);
4973 server
->total_read
+= length
;
4975 buf_size
= pdu_length
- sizeof(struct smb2_transform_hdr
);
4976 length
= decrypt_raw_data(server
, buf
, buf_size
, NULL
, false);
4980 next_is_large
= server
->large_buf
;
4982 shdr
= (struct smb2_hdr
*)buf
;
4983 next_cmd
= le32_to_cpu(shdr
->NextCommand
);
4985 if (WARN_ON_ONCE(next_cmd
> pdu_length
))
4988 next_buffer
= (char *)cifs_buf_get();
4990 next_buffer
= (char *)cifs_small_buf_get();
4991 memcpy(next_buffer
, buf
+ next_cmd
, pdu_length
- next_cmd
);
4994 mid_entry
= smb2_find_mid(server
, buf
);
4995 if (mid_entry
== NULL
)
4996 cifs_dbg(FYI
, "mid not found\n");
4998 cifs_dbg(FYI
, "mid found\n");
4999 mid_entry
->decrypted
= true;
5000 mid_entry
->resp_buf_size
= server
->pdu_size
;
5003 if (*num_mids
>= MAX_COMPOUND
) {
5004 cifs_server_dbg(VFS
, "too many PDUs in compound\n");
5007 bufs
[*num_mids
] = buf
;
5008 mids
[(*num_mids
)++] = mid_entry
;
5010 if (mid_entry
&& mid_entry
->handle
)
5011 ret
= mid_entry
->handle(server
, mid_entry
);
5013 ret
= cifs_handle_standard(server
, mid_entry
);
5015 if (ret
== 0 && next_cmd
) {
5016 pdu_length
-= next_cmd
;
5017 server
->large_buf
= next_is_large
;
5019 server
->bigbuf
= buf
= next_buffer
;
5021 server
->smallbuf
= buf
= next_buffer
;
5023 } else if (ret
!= 0) {
5025 * ret != 0 here means that we didn't get to handle_mid() thus
5026 * server->smallbuf and server->bigbuf are still valid. We need
5027 * to free next_buffer because it is not going to be used
5031 free_rsp_buf(CIFS_LARGE_BUFFER
, next_buffer
);
5033 free_rsp_buf(CIFS_SMALL_BUFFER
, next_buffer
);
5040 smb3_receive_transform(struct TCP_Server_Info
*server
,
5041 struct mid_q_entry
**mids
, char **bufs
, int *num_mids
)
5043 char *buf
= server
->smallbuf
;
5044 unsigned int pdu_length
= server
->pdu_size
;
5045 struct smb2_transform_hdr
*tr_hdr
= (struct smb2_transform_hdr
*)buf
;
5046 unsigned int orig_len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
);
5048 if (pdu_length
< sizeof(struct smb2_transform_hdr
) +
5049 sizeof(struct smb2_hdr
)) {
5050 cifs_server_dbg(VFS
, "Transform message is too small (%u)\n",
5052 cifs_reconnect(server
, true);
5053 return -ECONNABORTED
;
5056 if (pdu_length
< orig_len
+ sizeof(struct smb2_transform_hdr
)) {
5057 cifs_server_dbg(VFS
, "Transform message is broken\n");
5058 cifs_reconnect(server
, true);
5059 return -ECONNABORTED
;
5062 /* TODO: add support for compounds containing READ. */
5063 if (pdu_length
> CIFSMaxBufSize
+ MAX_HEADER_SIZE(server
)) {
5064 return receive_encrypted_read(server
, &mids
[0], num_mids
);
5067 return receive_encrypted_standard(server
, mids
, bufs
, num_mids
);
5071 smb3_handle_read_data(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
5073 char *buf
= server
->large_buf
? server
->bigbuf
: server
->smallbuf
;
5075 return handle_read_data(server
, mid
, buf
, server
->pdu_size
,
5079 static int smb2_next_header(struct TCP_Server_Info
*server
, char *buf
,
5082 struct smb2_hdr
*hdr
= (struct smb2_hdr
*)buf
;
5083 struct smb2_transform_hdr
*t_hdr
= (struct smb2_transform_hdr
*)buf
;
5085 if (hdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
) {
5086 *noff
= le32_to_cpu(t_hdr
->OriginalMessageSize
);
5087 if (unlikely(check_add_overflow(*noff
, sizeof(*t_hdr
), noff
)))
5090 *noff
= le32_to_cpu(hdr
->NextCommand
);
5092 if (unlikely(*noff
&& *noff
< MID_HEADER_SIZE(server
)))
5097 int cifs_sfu_make_node(unsigned int xid
, struct inode
*inode
,
5098 struct dentry
*dentry
, struct cifs_tcon
*tcon
,
5099 const char *full_path
, umode_t mode
, dev_t dev
)
5101 struct cifs_open_info_data buf
= {};
5102 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
5103 struct cifs_open_parms oparms
;
5104 struct cifs_io_parms io_parms
= {};
5105 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
5106 struct cifs_fid fid
;
5107 unsigned int bytes_written
;
5108 struct win_dev
*pdev
;
5110 __u32 oplock
= server
->oplocks
? REQ_OPLOCK
: 0;
5113 if (!S_ISCHR(mode
) && !S_ISBLK(mode
) && !S_ISFIFO(mode
))
5116 oparms
= (struct cifs_open_parms
) {
5119 .desired_access
= GENERIC_WRITE
,
5120 .create_options
= cifs_create_options(cifs_sb
, CREATE_NOT_DIR
|
5121 CREATE_OPTION_SPECIAL
),
5122 .disposition
= FILE_CREATE
,
5127 rc
= server
->ops
->open(xid
, &oparms
, &oplock
, &buf
);
5132 * BB Do not bother to decode buf since no local inode yet to put
5133 * timestamps in, but we can reuse it safely.
5135 pdev
= (struct win_dev
*)&buf
.fi
;
5136 io_parms
.pid
= current
->tgid
;
5137 io_parms
.tcon
= tcon
;
5138 io_parms
.length
= sizeof(*pdev
);
5139 iov
[1].iov_base
= pdev
;
5140 iov
[1].iov_len
= sizeof(*pdev
);
5141 if (S_ISCHR(mode
)) {
5142 memcpy(pdev
->type
, "IntxCHR", 8);
5143 pdev
->major
= cpu_to_le64(MAJOR(dev
));
5144 pdev
->minor
= cpu_to_le64(MINOR(dev
));
5145 } else if (S_ISBLK(mode
)) {
5146 memcpy(pdev
->type
, "IntxBLK", 8);
5147 pdev
->major
= cpu_to_le64(MAJOR(dev
));
5148 pdev
->minor
= cpu_to_le64(MINOR(dev
));
5149 } else if (S_ISFIFO(mode
)) {
5150 memcpy(pdev
->type
, "LnxFIFO", 8);
5153 rc
= server
->ops
->sync_write(xid
, &fid
, &io_parms
,
5154 &bytes_written
, iov
, 1);
5155 server
->ops
->close(xid
, tcon
, &fid
);
5157 /* FIXME: add code here to set EAs */
5158 cifs_free_open_info(&buf
);
5162 static int smb2_make_node(unsigned int xid
, struct inode
*inode
,
5163 struct dentry
*dentry
, struct cifs_tcon
*tcon
,
5164 const char *full_path
, umode_t mode
, dev_t dev
)
5166 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
5169 * Check if mounted with mount parm 'sfu' mount parm.
5170 * SFU emulation should work with all servers, but only
5171 * supports block and char device (no socket & fifo),
5172 * and was used by default in earlier versions of Windows
5174 if (!(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
))
5177 * TODO: Add ability to create instead via reparse point. Windows (e.g.
5178 * their current NFS server) uses this approach to expose special files
5179 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5181 return cifs_sfu_make_node(xid
, inode
, dentry
, tcon
,
5182 full_path
, mode
, dev
);
5185 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5186 struct smb_version_operations smb20_operations
= {
5187 .compare_fids
= smb2_compare_fids
,
5188 .setup_request
= smb2_setup_request
,
5189 .setup_async_request
= smb2_setup_async_request
,
5190 .check_receive
= smb2_check_receive
,
5191 .add_credits
= smb2_add_credits
,
5192 .set_credits
= smb2_set_credits
,
5193 .get_credits_field
= smb2_get_credits_field
,
5194 .get_credits
= smb2_get_credits
,
5195 .wait_mtu_credits
= cifs_wait_mtu_credits
,
5196 .get_next_mid
= smb2_get_next_mid
,
5197 .revert_current_mid
= smb2_revert_current_mid
,
5198 .read_data_offset
= smb2_read_data_offset
,
5199 .read_data_length
= smb2_read_data_length
,
5200 .map_error
= map_smb2_to_linux_error
,
5201 .find_mid
= smb2_find_mid
,
5202 .check_message
= smb2_check_message
,
5203 .dump_detail
= smb2_dump_detail
,
5204 .clear_stats
= smb2_clear_stats
,
5205 .print_stats
= smb2_print_stats
,
5206 .is_oplock_break
= smb2_is_valid_oplock_break
,
5207 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5208 .downgrade_oplock
= smb2_downgrade_oplock
,
5209 .need_neg
= smb2_need_neg
,
5210 .negotiate
= smb2_negotiate
,
5211 .negotiate_wsize
= smb2_negotiate_wsize
,
5212 .negotiate_rsize
= smb2_negotiate_rsize
,
5213 .sess_setup
= SMB2_sess_setup
,
5214 .logoff
= SMB2_logoff
,
5215 .tree_connect
= SMB2_tcon
,
5216 .tree_disconnect
= SMB2_tdis
,
5217 .qfs_tcon
= smb2_qfs_tcon
,
5218 .is_path_accessible
= smb2_is_path_accessible
,
5219 .can_echo
= smb2_can_echo
,
5221 .query_path_info
= smb2_query_path_info
,
5222 .query_reparse_point
= smb2_query_reparse_point
,
5223 .get_srv_inum
= smb2_get_srv_inum
,
5224 .query_file_info
= smb2_query_file_info
,
5225 .set_path_size
= smb2_set_path_size
,
5226 .set_file_size
= smb2_set_file_size
,
5227 .set_file_info
= smb2_set_file_info
,
5228 .set_compression
= smb2_set_compression
,
5229 .mkdir
= smb2_mkdir
,
5230 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5231 .rmdir
= smb2_rmdir
,
5232 .unlink
= smb2_unlink
,
5233 .rename
= smb2_rename_path
,
5234 .create_hardlink
= smb2_create_hardlink
,
5235 .parse_reparse_point
= smb2_parse_reparse_point
,
5236 .query_mf_symlink
= smb3_query_mf_symlink
,
5237 .create_mf_symlink
= smb3_create_mf_symlink
,
5238 .open
= smb2_open_file
,
5239 .set_fid
= smb2_set_fid
,
5240 .close
= smb2_close_file
,
5241 .flush
= smb2_flush_file
,
5242 .async_readv
= smb2_async_readv
,
5243 .async_writev
= smb2_async_writev
,
5244 .sync_read
= smb2_sync_read
,
5245 .sync_write
= smb2_sync_write
,
5246 .query_dir_first
= smb2_query_dir_first
,
5247 .query_dir_next
= smb2_query_dir_next
,
5248 .close_dir
= smb2_close_dir
,
5249 .calc_smb_size
= smb2_calc_size
,
5250 .is_status_pending
= smb2_is_status_pending
,
5251 .is_session_expired
= smb2_is_session_expired
,
5252 .oplock_response
= smb2_oplock_response
,
5253 .queryfs
= smb2_queryfs
,
5254 .mand_lock
= smb2_mand_lock
,
5255 .mand_unlock_range
= smb2_unlock_range
,
5256 .push_mand_locks
= smb2_push_mandatory_locks
,
5257 .get_lease_key
= smb2_get_lease_key
,
5258 .set_lease_key
= smb2_set_lease_key
,
5259 .new_lease_key
= smb2_new_lease_key
,
5260 .calc_signature
= smb2_calc_signature
,
5261 .is_read_op
= smb2_is_read_op
,
5262 .set_oplock_level
= smb2_set_oplock_level
,
5263 .create_lease_buf
= smb2_create_lease_buf
,
5264 .parse_lease_buf
= smb2_parse_lease_buf
,
5265 .copychunk_range
= smb2_copychunk_range
,
5266 .wp_retry_size
= smb2_wp_retry_size
,
5267 .dir_needs_close
= smb2_dir_needs_close
,
5268 .get_dfs_refer
= smb2_get_dfs_refer
,
5269 .select_sectype
= smb2_select_sectype
,
5270 #ifdef CONFIG_CIFS_XATTR
5271 .query_all_EAs
= smb2_query_eas
,
5272 .set_EA
= smb2_set_ea
,
5273 #endif /* CIFS_XATTR */
5274 .get_acl
= get_smb2_acl
,
5275 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5276 .set_acl
= set_smb2_acl
,
5277 .next_header
= smb2_next_header
,
5278 .ioctl_query_info
= smb2_ioctl_query_info
,
5279 .make_node
= smb2_make_node
,
5280 .fiemap
= smb3_fiemap
,
5281 .llseek
= smb3_llseek
,
5282 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5283 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5285 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5287 struct smb_version_operations smb21_operations
= {
5288 .compare_fids
= smb2_compare_fids
,
5289 .setup_request
= smb2_setup_request
,
5290 .setup_async_request
= smb2_setup_async_request
,
5291 .check_receive
= smb2_check_receive
,
5292 .add_credits
= smb2_add_credits
,
5293 .set_credits
= smb2_set_credits
,
5294 .get_credits_field
= smb2_get_credits_field
,
5295 .get_credits
= smb2_get_credits
,
5296 .wait_mtu_credits
= smb2_wait_mtu_credits
,
5297 .adjust_credits
= smb2_adjust_credits
,
5298 .get_next_mid
= smb2_get_next_mid
,
5299 .revert_current_mid
= smb2_revert_current_mid
,
5300 .read_data_offset
= smb2_read_data_offset
,
5301 .read_data_length
= smb2_read_data_length
,
5302 .map_error
= map_smb2_to_linux_error
,
5303 .find_mid
= smb2_find_mid
,
5304 .check_message
= smb2_check_message
,
5305 .dump_detail
= smb2_dump_detail
,
5306 .clear_stats
= smb2_clear_stats
,
5307 .print_stats
= smb2_print_stats
,
5308 .is_oplock_break
= smb2_is_valid_oplock_break
,
5309 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5310 .downgrade_oplock
= smb2_downgrade_oplock
,
5311 .need_neg
= smb2_need_neg
,
5312 .negotiate
= smb2_negotiate
,
5313 .negotiate_wsize
= smb2_negotiate_wsize
,
5314 .negotiate_rsize
= smb2_negotiate_rsize
,
5315 .sess_setup
= SMB2_sess_setup
,
5316 .logoff
= SMB2_logoff
,
5317 .tree_connect
= SMB2_tcon
,
5318 .tree_disconnect
= SMB2_tdis
,
5319 .qfs_tcon
= smb2_qfs_tcon
,
5320 .is_path_accessible
= smb2_is_path_accessible
,
5321 .can_echo
= smb2_can_echo
,
5323 .query_path_info
= smb2_query_path_info
,
5324 .query_reparse_point
= smb2_query_reparse_point
,
5325 .get_srv_inum
= smb2_get_srv_inum
,
5326 .query_file_info
= smb2_query_file_info
,
5327 .set_path_size
= smb2_set_path_size
,
5328 .set_file_size
= smb2_set_file_size
,
5329 .set_file_info
= smb2_set_file_info
,
5330 .set_compression
= smb2_set_compression
,
5331 .mkdir
= smb2_mkdir
,
5332 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5333 .rmdir
= smb2_rmdir
,
5334 .unlink
= smb2_unlink
,
5335 .rename
= smb2_rename_path
,
5336 .create_hardlink
= smb2_create_hardlink
,
5337 .parse_reparse_point
= smb2_parse_reparse_point
,
5338 .query_mf_symlink
= smb3_query_mf_symlink
,
5339 .create_mf_symlink
= smb3_create_mf_symlink
,
5340 .open
= smb2_open_file
,
5341 .set_fid
= smb2_set_fid
,
5342 .close
= smb2_close_file
,
5343 .flush
= smb2_flush_file
,
5344 .async_readv
= smb2_async_readv
,
5345 .async_writev
= smb2_async_writev
,
5346 .sync_read
= smb2_sync_read
,
5347 .sync_write
= smb2_sync_write
,
5348 .query_dir_first
= smb2_query_dir_first
,
5349 .query_dir_next
= smb2_query_dir_next
,
5350 .close_dir
= smb2_close_dir
,
5351 .calc_smb_size
= smb2_calc_size
,
5352 .is_status_pending
= smb2_is_status_pending
,
5353 .is_session_expired
= smb2_is_session_expired
,
5354 .oplock_response
= smb2_oplock_response
,
5355 .queryfs
= smb2_queryfs
,
5356 .mand_lock
= smb2_mand_lock
,
5357 .mand_unlock_range
= smb2_unlock_range
,
5358 .push_mand_locks
= smb2_push_mandatory_locks
,
5359 .get_lease_key
= smb2_get_lease_key
,
5360 .set_lease_key
= smb2_set_lease_key
,
5361 .new_lease_key
= smb2_new_lease_key
,
5362 .calc_signature
= smb2_calc_signature
,
5363 .is_read_op
= smb21_is_read_op
,
5364 .set_oplock_level
= smb21_set_oplock_level
,
5365 .create_lease_buf
= smb2_create_lease_buf
,
5366 .parse_lease_buf
= smb2_parse_lease_buf
,
5367 .copychunk_range
= smb2_copychunk_range
,
5368 .wp_retry_size
= smb2_wp_retry_size
,
5369 .dir_needs_close
= smb2_dir_needs_close
,
5370 .enum_snapshots
= smb3_enum_snapshots
,
5371 .notify
= smb3_notify
,
5372 .get_dfs_refer
= smb2_get_dfs_refer
,
5373 .select_sectype
= smb2_select_sectype
,
5374 #ifdef CONFIG_CIFS_XATTR
5375 .query_all_EAs
= smb2_query_eas
,
5376 .set_EA
= smb2_set_ea
,
5377 #endif /* CIFS_XATTR */
5378 .get_acl
= get_smb2_acl
,
5379 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5380 .set_acl
= set_smb2_acl
,
5381 .next_header
= smb2_next_header
,
5382 .ioctl_query_info
= smb2_ioctl_query_info
,
5383 .make_node
= smb2_make_node
,
5384 .fiemap
= smb3_fiemap
,
5385 .llseek
= smb3_llseek
,
5386 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5387 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5390 struct smb_version_operations smb30_operations
= {
5391 .compare_fids
= smb2_compare_fids
,
5392 .setup_request
= smb2_setup_request
,
5393 .setup_async_request
= smb2_setup_async_request
,
5394 .check_receive
= smb2_check_receive
,
5395 .add_credits
= smb2_add_credits
,
5396 .set_credits
= smb2_set_credits
,
5397 .get_credits_field
= smb2_get_credits_field
,
5398 .get_credits
= smb2_get_credits
,
5399 .wait_mtu_credits
= smb2_wait_mtu_credits
,
5400 .adjust_credits
= smb2_adjust_credits
,
5401 .get_next_mid
= smb2_get_next_mid
,
5402 .revert_current_mid
= smb2_revert_current_mid
,
5403 .read_data_offset
= smb2_read_data_offset
,
5404 .read_data_length
= smb2_read_data_length
,
5405 .map_error
= map_smb2_to_linux_error
,
5406 .find_mid
= smb2_find_mid
,
5407 .check_message
= smb2_check_message
,
5408 .dump_detail
= smb2_dump_detail
,
5409 .clear_stats
= smb2_clear_stats
,
5410 .print_stats
= smb2_print_stats
,
5411 .dump_share_caps
= smb2_dump_share_caps
,
5412 .is_oplock_break
= smb2_is_valid_oplock_break
,
5413 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5414 .downgrade_oplock
= smb3_downgrade_oplock
,
5415 .need_neg
= smb2_need_neg
,
5416 .negotiate
= smb2_negotiate
,
5417 .negotiate_wsize
= smb3_negotiate_wsize
,
5418 .negotiate_rsize
= smb3_negotiate_rsize
,
5419 .sess_setup
= SMB2_sess_setup
,
5420 .logoff
= SMB2_logoff
,
5421 .tree_connect
= SMB2_tcon
,
5422 .tree_disconnect
= SMB2_tdis
,
5423 .qfs_tcon
= smb3_qfs_tcon
,
5424 .is_path_accessible
= smb2_is_path_accessible
,
5425 .can_echo
= smb2_can_echo
,
5427 .query_path_info
= smb2_query_path_info
,
5428 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5429 .query_reparse_point
= smb2_query_reparse_point
,
5430 .get_srv_inum
= smb2_get_srv_inum
,
5431 .query_file_info
= smb2_query_file_info
,
5432 .set_path_size
= smb2_set_path_size
,
5433 .set_file_size
= smb2_set_file_size
,
5434 .set_file_info
= smb2_set_file_info
,
5435 .set_compression
= smb2_set_compression
,
5436 .mkdir
= smb2_mkdir
,
5437 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5438 .rmdir
= smb2_rmdir
,
5439 .unlink
= smb2_unlink
,
5440 .rename
= smb2_rename_path
,
5441 .create_hardlink
= smb2_create_hardlink
,
5442 .parse_reparse_point
= smb2_parse_reparse_point
,
5443 .query_mf_symlink
= smb3_query_mf_symlink
,
5444 .create_mf_symlink
= smb3_create_mf_symlink
,
5445 .open
= smb2_open_file
,
5446 .set_fid
= smb2_set_fid
,
5447 .close
= smb2_close_file
,
5448 .close_getattr
= smb2_close_getattr
,
5449 .flush
= smb2_flush_file
,
5450 .async_readv
= smb2_async_readv
,
5451 .async_writev
= smb2_async_writev
,
5452 .sync_read
= smb2_sync_read
,
5453 .sync_write
= smb2_sync_write
,
5454 .query_dir_first
= smb2_query_dir_first
,
5455 .query_dir_next
= smb2_query_dir_next
,
5456 .close_dir
= smb2_close_dir
,
5457 .calc_smb_size
= smb2_calc_size
,
5458 .is_status_pending
= smb2_is_status_pending
,
5459 .is_session_expired
= smb2_is_session_expired
,
5460 .oplock_response
= smb2_oplock_response
,
5461 .queryfs
= smb2_queryfs
,
5462 .mand_lock
= smb2_mand_lock
,
5463 .mand_unlock_range
= smb2_unlock_range
,
5464 .push_mand_locks
= smb2_push_mandatory_locks
,
5465 .get_lease_key
= smb2_get_lease_key
,
5466 .set_lease_key
= smb2_set_lease_key
,
5467 .new_lease_key
= smb2_new_lease_key
,
5468 .generate_signingkey
= generate_smb30signingkey
,
5469 .calc_signature
= smb3_calc_signature
,
5470 .set_integrity
= smb3_set_integrity
,
5471 .is_read_op
= smb21_is_read_op
,
5472 .set_oplock_level
= smb3_set_oplock_level
,
5473 .create_lease_buf
= smb3_create_lease_buf
,
5474 .parse_lease_buf
= smb3_parse_lease_buf
,
5475 .copychunk_range
= smb2_copychunk_range
,
5476 .duplicate_extents
= smb2_duplicate_extents
,
5477 .validate_negotiate
= smb3_validate_negotiate
,
5478 .wp_retry_size
= smb2_wp_retry_size
,
5479 .dir_needs_close
= smb2_dir_needs_close
,
5480 .fallocate
= smb3_fallocate
,
5481 .enum_snapshots
= smb3_enum_snapshots
,
5482 .notify
= smb3_notify
,
5483 .init_transform_rq
= smb3_init_transform_rq
,
5484 .is_transform_hdr
= smb3_is_transform_hdr
,
5485 .receive_transform
= smb3_receive_transform
,
5486 .get_dfs_refer
= smb2_get_dfs_refer
,
5487 .select_sectype
= smb2_select_sectype
,
5488 #ifdef CONFIG_CIFS_XATTR
5489 .query_all_EAs
= smb2_query_eas
,
5490 .set_EA
= smb2_set_ea
,
5491 #endif /* CIFS_XATTR */
5492 .get_acl
= get_smb2_acl
,
5493 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5494 .set_acl
= set_smb2_acl
,
5495 .next_header
= smb2_next_header
,
5496 .ioctl_query_info
= smb2_ioctl_query_info
,
5497 .make_node
= smb2_make_node
,
5498 .fiemap
= smb3_fiemap
,
5499 .llseek
= smb3_llseek
,
5500 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5501 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5504 struct smb_version_operations smb311_operations
= {
5505 .compare_fids
= smb2_compare_fids
,
5506 .setup_request
= smb2_setup_request
,
5507 .setup_async_request
= smb2_setup_async_request
,
5508 .check_receive
= smb2_check_receive
,
5509 .add_credits
= smb2_add_credits
,
5510 .set_credits
= smb2_set_credits
,
5511 .get_credits_field
= smb2_get_credits_field
,
5512 .get_credits
= smb2_get_credits
,
5513 .wait_mtu_credits
= smb2_wait_mtu_credits
,
5514 .adjust_credits
= smb2_adjust_credits
,
5515 .get_next_mid
= smb2_get_next_mid
,
5516 .revert_current_mid
= smb2_revert_current_mid
,
5517 .read_data_offset
= smb2_read_data_offset
,
5518 .read_data_length
= smb2_read_data_length
,
5519 .map_error
= map_smb2_to_linux_error
,
5520 .find_mid
= smb2_find_mid
,
5521 .check_message
= smb2_check_message
,
5522 .dump_detail
= smb2_dump_detail
,
5523 .clear_stats
= smb2_clear_stats
,
5524 .print_stats
= smb2_print_stats
,
5525 .dump_share_caps
= smb2_dump_share_caps
,
5526 .is_oplock_break
= smb2_is_valid_oplock_break
,
5527 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5528 .downgrade_oplock
= smb3_downgrade_oplock
,
5529 .need_neg
= smb2_need_neg
,
5530 .negotiate
= smb2_negotiate
,
5531 .negotiate_wsize
= smb3_negotiate_wsize
,
5532 .negotiate_rsize
= smb3_negotiate_rsize
,
5533 .sess_setup
= SMB2_sess_setup
,
5534 .logoff
= SMB2_logoff
,
5535 .tree_connect
= SMB2_tcon
,
5536 .tree_disconnect
= SMB2_tdis
,
5537 .qfs_tcon
= smb3_qfs_tcon
,
5538 .is_path_accessible
= smb2_is_path_accessible
,
5539 .can_echo
= smb2_can_echo
,
5541 .query_path_info
= smb2_query_path_info
,
5542 .query_reparse_point
= smb2_query_reparse_point
,
5543 .get_srv_inum
= smb2_get_srv_inum
,
5544 .query_file_info
= smb2_query_file_info
,
5545 .set_path_size
= smb2_set_path_size
,
5546 .set_file_size
= smb2_set_file_size
,
5547 .set_file_info
= smb2_set_file_info
,
5548 .set_compression
= smb2_set_compression
,
5549 .mkdir
= smb2_mkdir
,
5550 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5551 .posix_mkdir
= smb311_posix_mkdir
,
5552 .rmdir
= smb2_rmdir
,
5553 .unlink
= smb2_unlink
,
5554 .rename
= smb2_rename_path
,
5555 .create_hardlink
= smb2_create_hardlink
,
5556 .parse_reparse_point
= smb2_parse_reparse_point
,
5557 .query_mf_symlink
= smb3_query_mf_symlink
,
5558 .create_mf_symlink
= smb3_create_mf_symlink
,
5559 .open
= smb2_open_file
,
5560 .set_fid
= smb2_set_fid
,
5561 .close
= smb2_close_file
,
5562 .close_getattr
= smb2_close_getattr
,
5563 .flush
= smb2_flush_file
,
5564 .async_readv
= smb2_async_readv
,
5565 .async_writev
= smb2_async_writev
,
5566 .sync_read
= smb2_sync_read
,
5567 .sync_write
= smb2_sync_write
,
5568 .query_dir_first
= smb2_query_dir_first
,
5569 .query_dir_next
= smb2_query_dir_next
,
5570 .close_dir
= smb2_close_dir
,
5571 .calc_smb_size
= smb2_calc_size
,
5572 .is_status_pending
= smb2_is_status_pending
,
5573 .is_session_expired
= smb2_is_session_expired
,
5574 .oplock_response
= smb2_oplock_response
,
5575 .queryfs
= smb311_queryfs
,
5576 .mand_lock
= smb2_mand_lock
,
5577 .mand_unlock_range
= smb2_unlock_range
,
5578 .push_mand_locks
= smb2_push_mandatory_locks
,
5579 .get_lease_key
= smb2_get_lease_key
,
5580 .set_lease_key
= smb2_set_lease_key
,
5581 .new_lease_key
= smb2_new_lease_key
,
5582 .generate_signingkey
= generate_smb311signingkey
,
5583 .calc_signature
= smb3_calc_signature
,
5584 .set_integrity
= smb3_set_integrity
,
5585 .is_read_op
= smb21_is_read_op
,
5586 .set_oplock_level
= smb3_set_oplock_level
,
5587 .create_lease_buf
= smb3_create_lease_buf
,
5588 .parse_lease_buf
= smb3_parse_lease_buf
,
5589 .copychunk_range
= smb2_copychunk_range
,
5590 .duplicate_extents
= smb2_duplicate_extents
,
5591 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5592 .wp_retry_size
= smb2_wp_retry_size
,
5593 .dir_needs_close
= smb2_dir_needs_close
,
5594 .fallocate
= smb3_fallocate
,
5595 .enum_snapshots
= smb3_enum_snapshots
,
5596 .notify
= smb3_notify
,
5597 .init_transform_rq
= smb3_init_transform_rq
,
5598 .is_transform_hdr
= smb3_is_transform_hdr
,
5599 .receive_transform
= smb3_receive_transform
,
5600 .get_dfs_refer
= smb2_get_dfs_refer
,
5601 .select_sectype
= smb2_select_sectype
,
5602 #ifdef CONFIG_CIFS_XATTR
5603 .query_all_EAs
= smb2_query_eas
,
5604 .set_EA
= smb2_set_ea
,
5605 #endif /* CIFS_XATTR */
5606 .get_acl
= get_smb2_acl
,
5607 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5608 .set_acl
= set_smb2_acl
,
5609 .next_header
= smb2_next_header
,
5610 .ioctl_query_info
= smb2_ioctl_query_info
,
5611 .make_node
= smb2_make_node
,
5612 .fiemap
= smb3_fiemap
,
5613 .llseek
= smb3_llseek
,
5614 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5615 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5618 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5619 struct smb_version_values smb20_values
= {
5620 .version_string
= SMB20_VERSION_STRING
,
5621 .protocol_id
= SMB20_PROT_ID
,
5622 .req_capabilities
= 0, /* MBZ */
5623 .large_lock_type
= 0,
5624 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5625 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5626 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5627 .header_size
= sizeof(struct smb2_hdr
),
5628 .header_preamble_size
= 0,
5629 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5630 .read_rsp_size
= sizeof(struct smb2_read_rsp
),
5631 .lock_cmd
= SMB2_LOCK
,
5633 .cap_nt_find
= SMB2_NT_FIND
,
5634 .cap_large_files
= SMB2_LARGE_FILES
,
5635 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5636 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5637 .create_lease_size
= sizeof(struct create_lease
),
5639 #endif /* ALLOW_INSECURE_LEGACY */
5641 struct smb_version_values smb21_values
= {
5642 .version_string
= SMB21_VERSION_STRING
,
5643 .protocol_id
= SMB21_PROT_ID
,
5644 .req_capabilities
= 0, /* MBZ on negotiate req until SMB3 dialect */
5645 .large_lock_type
= 0,
5646 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5647 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5648 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5649 .header_size
= sizeof(struct smb2_hdr
),
5650 .header_preamble_size
= 0,
5651 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5652 .read_rsp_size
= sizeof(struct smb2_read_rsp
),
5653 .lock_cmd
= SMB2_LOCK
,
5655 .cap_nt_find
= SMB2_NT_FIND
,
5656 .cap_large_files
= SMB2_LARGE_FILES
,
5657 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5658 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5659 .create_lease_size
= sizeof(struct create_lease
),
5662 struct smb_version_values smb3any_values
= {
5663 .version_string
= SMB3ANY_VERSION_STRING
,
5664 .protocol_id
= SMB302_PROT_ID
, /* doesn't matter, send protocol array */
5665 .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
,
5666 .large_lock_type
= 0,
5667 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5668 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5669 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5670 .header_size
= sizeof(struct smb2_hdr
),
5671 .header_preamble_size
= 0,
5672 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5673 .read_rsp_size
= sizeof(struct smb2_read_rsp
),
5674 .lock_cmd
= SMB2_LOCK
,
5676 .cap_nt_find
= SMB2_NT_FIND
,
5677 .cap_large_files
= SMB2_LARGE_FILES
,
5678 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5679 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5680 .create_lease_size
= sizeof(struct create_lease_v2
),
5683 struct smb_version_values smbdefault_values
= {
5684 .version_string
= SMBDEFAULT_VERSION_STRING
,
5685 .protocol_id
= SMB302_PROT_ID
, /* doesn't matter, send protocol array */
5686 .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
,
5687 .large_lock_type
= 0,
5688 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5689 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5690 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5691 .header_size
= sizeof(struct smb2_hdr
),
5692 .header_preamble_size
= 0,
5693 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5694 .read_rsp_size
= sizeof(struct smb2_read_rsp
),
5695 .lock_cmd
= SMB2_LOCK
,
5697 .cap_nt_find
= SMB2_NT_FIND
,
5698 .cap_large_files
= SMB2_LARGE_FILES
,
5699 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5700 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5701 .create_lease_size
= sizeof(struct create_lease_v2
),
5704 struct smb_version_values smb30_values
= {
5705 .version_string
= SMB30_VERSION_STRING
,
5706 .protocol_id
= SMB30_PROT_ID
,
5707 .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
,
5708 .large_lock_type
= 0,
5709 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5710 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5711 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5712 .header_size
= sizeof(struct smb2_hdr
),
5713 .header_preamble_size
= 0,
5714 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5715 .read_rsp_size
= sizeof(struct smb2_read_rsp
),
5716 .lock_cmd
= SMB2_LOCK
,
5718 .cap_nt_find
= SMB2_NT_FIND
,
5719 .cap_large_files
= SMB2_LARGE_FILES
,
5720 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5721 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5722 .create_lease_size
= sizeof(struct create_lease_v2
),
5725 struct smb_version_values smb302_values
= {
5726 .version_string
= SMB302_VERSION_STRING
,
5727 .protocol_id
= SMB302_PROT_ID
,
5728 .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
,
5729 .large_lock_type
= 0,
5730 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5731 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5732 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5733 .header_size
= sizeof(struct smb2_hdr
),
5734 .header_preamble_size
= 0,
5735 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5736 .read_rsp_size
= sizeof(struct smb2_read_rsp
),
5737 .lock_cmd
= SMB2_LOCK
,
5739 .cap_nt_find
= SMB2_NT_FIND
,
5740 .cap_large_files
= SMB2_LARGE_FILES
,
5741 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5742 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5743 .create_lease_size
= sizeof(struct create_lease_v2
),
5746 struct smb_version_values smb311_values
= {
5747 .version_string
= SMB311_VERSION_STRING
,
5748 .protocol_id
= SMB311_PROT_ID
,
5749 .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
,
5750 .large_lock_type
= 0,
5751 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5752 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5753 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5754 .header_size
= sizeof(struct smb2_hdr
),
5755 .header_preamble_size
= 0,
5756 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5757 .read_rsp_size
= sizeof(struct smb2_read_rsp
),
5758 .lock_cmd
= SMB2_LOCK
,
5760 .cap_nt_find
= SMB2_NT_FIND
,
5761 .cap_large_files
= SMB2_LARGE_FILES
,
5762 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5763 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5764 .create_lease_size
= sizeof(struct create_lease_v2
),