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 server
->oplock_credits
= server
->echo_credits
= 0;
38 switch (server
->credits
) {
42 server
->echoes
= false;
43 server
->oplocks
= false;
46 server
->echoes
= true;
47 server
->oplocks
= false;
48 server
->echo_credits
= 1;
51 server
->echoes
= true;
53 server
->oplocks
= true;
54 server
->oplock_credits
= 1;
56 server
->oplocks
= false;
58 server
->echo_credits
= 1;
60 server
->credits
-= server
->echo_credits
+ server
->oplock_credits
;
61 return server
->credits
+ server
->echo_credits
+ server
->oplock_credits
;
65 smb2_add_credits(struct TCP_Server_Info
*server
,
66 const struct cifs_credits
*credits
, const int optype
)
69 int scredits
, in_flight
;
70 unsigned int add
= credits
->value
;
71 unsigned int instance
= credits
->instance
;
72 bool reconnect_detected
= false;
73 bool reconnect_with_invalid_credits
= false;
75 spin_lock(&server
->req_lock
);
76 val
= server
->ops
->get_credits_field(server
, optype
);
78 /* eg found case where write overlapping reconnect messed up credits */
79 if (((optype
& CIFS_OP_MASK
) == CIFS_NEG_OP
) && (*val
!= 0))
80 reconnect_with_invalid_credits
= true;
82 if ((instance
== 0) || (instance
== server
->reconnect_instance
))
85 reconnect_detected
= true;
88 *val
= 65000; /* Don't get near 64K credits, avoid srv bugs */
89 pr_warn_once("server overflowed SMB3 credits\n");
90 trace_smb3_overflow_credits(server
->CurrentMid
,
91 server
->conn_id
, server
->hostname
, *val
,
92 add
, server
->in_flight
);
95 if (server
->in_flight
== 0 &&
96 ((optype
& CIFS_OP_MASK
) != CIFS_NEG_OP
) &&
97 ((optype
& CIFS_OP_MASK
) != CIFS_SESS_OP
))
98 rc
= change_conf(server
);
100 * Sometimes server returns 0 credits on oplock break ack - we need to
101 * rebalance credits in this case.
103 else if (server
->in_flight
> 0 && server
->oplock_credits
== 0 &&
105 if (server
->credits
> 1) {
107 server
->oplock_credits
++;
111 in_flight
= server
->in_flight
;
112 spin_unlock(&server
->req_lock
);
113 wake_up(&server
->request_q
);
115 if (reconnect_detected
) {
116 trace_smb3_reconnect_detected(server
->CurrentMid
,
117 server
->conn_id
, server
->hostname
, scredits
, add
, in_flight
);
119 cifs_dbg(FYI
, "trying to put %d credits from the old server instance %d\n",
123 if (reconnect_with_invalid_credits
) {
124 trace_smb3_reconnect_with_invalid_credits(server
->CurrentMid
,
125 server
->conn_id
, server
->hostname
, scredits
, add
, in_flight
);
126 cifs_dbg(FYI
, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
127 optype
, scredits
, add
);
130 spin_lock(&server
->srv_lock
);
131 if (server
->tcpStatus
== CifsNeedReconnect
132 || server
->tcpStatus
== CifsExiting
) {
133 spin_unlock(&server
->srv_lock
);
136 spin_unlock(&server
->srv_lock
);
140 /* change_conf hasn't been executed */
143 cifs_server_dbg(VFS
, "Possible client or server bug - zero credits\n");
146 cifs_server_dbg(VFS
, "disabling echoes and oplocks\n");
149 cifs_dbg(FYI
, "disabling oplocks\n");
152 /* change_conf rebalanced credits for different types */
156 trace_smb3_add_credits(server
->CurrentMid
,
157 server
->conn_id
, server
->hostname
, scredits
, add
, in_flight
);
158 cifs_dbg(FYI
, "%s: added %u credits total=%d\n", __func__
, add
, scredits
);
162 smb2_set_credits(struct TCP_Server_Info
*server
, const int val
)
164 int scredits
, in_flight
;
166 spin_lock(&server
->req_lock
);
167 server
->credits
= val
;
169 server
->reconnect_instance
++;
170 scredits
= server
->credits
;
171 in_flight
= server
->in_flight
;
172 spin_unlock(&server
->req_lock
);
174 trace_smb3_set_credits(server
->CurrentMid
,
175 server
->conn_id
, server
->hostname
, scredits
, val
, in_flight
);
176 cifs_dbg(FYI
, "%s: set %u credits\n", __func__
, val
);
178 /* don't log while holding the lock */
180 cifs_dbg(FYI
, "set credits to 1 due to smb2 reconnect\n");
184 smb2_get_credits_field(struct TCP_Server_Info
*server
, const int optype
)
188 return &server
->echo_credits
;
190 return &server
->oplock_credits
;
192 return &server
->credits
;
197 smb2_get_credits(struct mid_q_entry
*mid
)
199 return mid
->credits_received
;
203 smb2_wait_mtu_credits(struct TCP_Server_Info
*server
, unsigned int size
,
204 unsigned int *num
, struct cifs_credits
*credits
)
207 unsigned int scredits
, in_flight
;
209 spin_lock(&server
->req_lock
);
211 if (server
->credits
<= 0) {
212 spin_unlock(&server
->req_lock
);
213 cifs_num_waiters_inc(server
);
214 rc
= wait_event_killable(server
->request_q
,
215 has_credits(server
, &server
->credits
, 1));
216 cifs_num_waiters_dec(server
);
219 spin_lock(&server
->req_lock
);
221 spin_unlock(&server
->req_lock
);
222 spin_lock(&server
->srv_lock
);
223 if (server
->tcpStatus
== CifsExiting
) {
224 spin_unlock(&server
->srv_lock
);
227 spin_unlock(&server
->srv_lock
);
229 spin_lock(&server
->req_lock
);
230 scredits
= server
->credits
;
231 /* can deadlock with reopen */
233 *num
= SMB2_MAX_BUFFER_SIZE
;
235 credits
->instance
= 0;
239 /* leave some credits for reopen and other ops */
241 *num
= min_t(unsigned int, size
,
242 scredits
* SMB2_MAX_BUFFER_SIZE
);
245 DIV_ROUND_UP(*num
, SMB2_MAX_BUFFER_SIZE
);
246 credits
->instance
= server
->reconnect_instance
;
247 server
->credits
-= credits
->value
;
249 if (server
->in_flight
> server
->max_in_flight
)
250 server
->max_in_flight
= server
->in_flight
;
254 scredits
= server
->credits
;
255 in_flight
= server
->in_flight
;
256 spin_unlock(&server
->req_lock
);
258 trace_smb3_wait_credits(server
->CurrentMid
,
259 server
->conn_id
, server
->hostname
, scredits
, -(credits
->value
), in_flight
);
260 cifs_dbg(FYI
, "%s: removed %u credits total=%d\n",
261 __func__
, credits
->value
, scredits
);
267 smb2_adjust_credits(struct TCP_Server_Info
*server
,
268 struct cifs_credits
*credits
,
269 const unsigned int payload_size
)
271 int new_val
= DIV_ROUND_UP(payload_size
, SMB2_MAX_BUFFER_SIZE
);
272 int scredits
, in_flight
;
274 if (!credits
->value
|| credits
->value
== new_val
)
277 if (credits
->value
< new_val
) {
278 trace_smb3_too_many_credits(server
->CurrentMid
,
279 server
->conn_id
, server
->hostname
, 0, credits
->value
- new_val
, 0);
280 cifs_server_dbg(VFS
, "request has less credits (%d) than required (%d)",
281 credits
->value
, new_val
);
286 spin_lock(&server
->req_lock
);
288 if (server
->reconnect_instance
!= credits
->instance
) {
289 scredits
= server
->credits
;
290 in_flight
= server
->in_flight
;
291 spin_unlock(&server
->req_lock
);
293 trace_smb3_reconnect_detected(server
->CurrentMid
,
294 server
->conn_id
, server
->hostname
, scredits
,
295 credits
->value
- new_val
, in_flight
);
296 cifs_server_dbg(VFS
, "trying to return %d credits to old session\n",
297 credits
->value
- new_val
);
301 server
->credits
+= credits
->value
- new_val
;
302 scredits
= server
->credits
;
303 in_flight
= server
->in_flight
;
304 spin_unlock(&server
->req_lock
);
305 wake_up(&server
->request_q
);
307 trace_smb3_adj_credits(server
->CurrentMid
,
308 server
->conn_id
, server
->hostname
, scredits
,
309 credits
->value
- new_val
, in_flight
);
310 cifs_dbg(FYI
, "%s: adjust added %u credits total=%d\n",
311 __func__
, credits
->value
- new_val
, scredits
);
313 credits
->value
= new_val
;
319 smb2_get_next_mid(struct TCP_Server_Info
*server
)
322 /* for SMB2 we need the current value */
323 spin_lock(&server
->mid_lock
);
324 mid
= server
->CurrentMid
++;
325 spin_unlock(&server
->mid_lock
);
330 smb2_revert_current_mid(struct TCP_Server_Info
*server
, const unsigned int val
)
332 spin_lock(&server
->mid_lock
);
333 if (server
->CurrentMid
>= val
)
334 server
->CurrentMid
-= val
;
335 spin_unlock(&server
->mid_lock
);
338 static struct mid_q_entry
*
339 __smb2_find_mid(struct TCP_Server_Info
*server
, char *buf
, bool dequeue
)
341 struct mid_q_entry
*mid
;
342 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
343 __u64 wire_mid
= le64_to_cpu(shdr
->MessageId
);
345 if (shdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
) {
346 cifs_server_dbg(VFS
, "Encrypted frame parsing not supported yet\n");
350 spin_lock(&server
->mid_lock
);
351 list_for_each_entry(mid
, &server
->pending_mid_q
, qhead
) {
352 if ((mid
->mid
== wire_mid
) &&
353 (mid
->mid_state
== MID_REQUEST_SUBMITTED
) &&
354 (mid
->command
== shdr
->Command
)) {
355 kref_get(&mid
->refcount
);
357 list_del_init(&mid
->qhead
);
358 mid
->mid_flags
|= MID_DELETED
;
360 spin_unlock(&server
->mid_lock
);
364 spin_unlock(&server
->mid_lock
);
368 static struct mid_q_entry
*
369 smb2_find_mid(struct TCP_Server_Info
*server
, char *buf
)
371 return __smb2_find_mid(server
, buf
, false);
374 static struct mid_q_entry
*
375 smb2_find_dequeue_mid(struct TCP_Server_Info
*server
, char *buf
)
377 return __smb2_find_mid(server
, buf
, true);
381 smb2_dump_detail(void *buf
, struct TCP_Server_Info
*server
)
383 #ifdef CONFIG_CIFS_DEBUG2
384 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
386 cifs_server_dbg(VFS
, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
387 shdr
->Command
, shdr
->Status
, shdr
->Flags
, shdr
->MessageId
,
388 shdr
->Id
.SyncId
.ProcessId
);
389 cifs_server_dbg(VFS
, "smb buf %p len %u\n", buf
,
390 server
->ops
->calc_smb_size(buf
));
395 smb2_need_neg(struct TCP_Server_Info
*server
)
397 return server
->max_read
== 0;
401 smb2_negotiate(const unsigned int xid
,
402 struct cifs_ses
*ses
,
403 struct TCP_Server_Info
*server
)
407 spin_lock(&server
->mid_lock
);
408 server
->CurrentMid
= 0;
409 spin_unlock(&server
->mid_lock
);
410 rc
= SMB2_negotiate(xid
, ses
, server
);
411 /* BB we probably don't need to retry with modern servers */
418 smb2_negotiate_wsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
420 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
423 /* start with specified wsize, or default */
424 wsize
= ctx
->wsize
? ctx
->wsize
: CIFS_DEFAULT_IOSIZE
;
425 wsize
= min_t(unsigned int, wsize
, server
->max_write
);
426 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
427 wsize
= min_t(unsigned int, wsize
, SMB2_MAX_BUFFER_SIZE
);
433 smb3_negotiate_wsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
435 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
438 /* start with specified wsize, or default */
439 wsize
= ctx
->wsize
? ctx
->wsize
: SMB3_DEFAULT_IOSIZE
;
440 wsize
= min_t(unsigned int, wsize
, server
->max_write
);
441 #ifdef CONFIG_CIFS_SMB_DIRECT
445 * Account for SMB2 data transfer packet header and
446 * possible encryption header
448 wsize
= min_t(unsigned int,
450 server
->smbd_conn
->max_fragmented_send_size
-
451 SMB2_READWRITE_PDU_HEADER_SIZE
-
452 sizeof(struct smb2_transform_hdr
));
454 wsize
= min_t(unsigned int,
455 wsize
, server
->smbd_conn
->max_readwrite_size
);
458 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
459 wsize
= min_t(unsigned int, wsize
, SMB2_MAX_BUFFER_SIZE
);
465 smb2_negotiate_rsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
467 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
470 /* start with specified rsize, or default */
471 rsize
= ctx
->rsize
? ctx
->rsize
: CIFS_DEFAULT_IOSIZE
;
472 rsize
= min_t(unsigned int, rsize
, server
->max_read
);
474 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
475 rsize
= min_t(unsigned int, rsize
, SMB2_MAX_BUFFER_SIZE
);
481 smb3_negotiate_rsize(struct cifs_tcon
*tcon
, struct smb3_fs_context
*ctx
)
483 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
486 /* start with specified rsize, or default */
487 rsize
= ctx
->rsize
? ctx
->rsize
: SMB3_DEFAULT_IOSIZE
;
488 rsize
= min_t(unsigned int, rsize
, server
->max_read
);
489 #ifdef CONFIG_CIFS_SMB_DIRECT
493 * Account for SMB2 data transfer packet header and
494 * possible encryption header
496 rsize
= min_t(unsigned int,
498 server
->smbd_conn
->max_fragmented_recv_size
-
499 SMB2_READWRITE_PDU_HEADER_SIZE
-
500 sizeof(struct smb2_transform_hdr
));
502 rsize
= min_t(unsigned int,
503 rsize
, server
->smbd_conn
->max_readwrite_size
);
507 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
508 rsize
= min_t(unsigned int, rsize
, SMB2_MAX_BUFFER_SIZE
);
514 parse_server_interfaces(struct network_interface_info_ioctl_rsp
*buf
,
516 struct cifs_ses
*ses
)
518 struct network_interface_info_ioctl_rsp
*p
;
519 struct sockaddr_in
*addr4
;
520 struct sockaddr_in6
*addr6
;
521 struct iface_info_ipv4
*p4
;
522 struct iface_info_ipv6
*p6
;
523 struct cifs_server_iface
*info
= NULL
, *iface
= NULL
, *niface
= NULL
;
524 struct cifs_server_iface tmp_iface
;
530 bytes_left
= buf_len
;
533 spin_lock(&ses
->iface_lock
);
535 * Go through iface_list and do kref_put to remove
536 * any unused ifaces. ifaces in use will be removed
537 * when the last user calls a kref_put on it
539 list_for_each_entry_safe(iface
, niface
, &ses
->iface_list
,
541 iface
->is_active
= 0;
542 kref_put(&iface
->refcount
, release_iface
);
544 spin_unlock(&ses
->iface_lock
);
546 while (bytes_left
>= sizeof(*p
)) {
547 memset(&tmp_iface
, 0, sizeof(tmp_iface
));
548 tmp_iface
.speed
= le64_to_cpu(p
->LinkSpeed
);
549 tmp_iface
.rdma_capable
= le32_to_cpu(p
->Capability
& RDMA_CAPABLE
) ? 1 : 0;
550 tmp_iface
.rss_capable
= le32_to_cpu(p
->Capability
& RSS_CAPABLE
) ? 1 : 0;
554 * The kernel and wire socket structures have the same
555 * layout and use network byte order but make the
556 * conversion explicit in case either one changes.
559 addr4
= (struct sockaddr_in
*)&tmp_iface
.sockaddr
;
560 p4
= (struct iface_info_ipv4
*)p
->Buffer
;
561 addr4
->sin_family
= AF_INET
;
562 memcpy(&addr4
->sin_addr
, &p4
->IPv4Address
, 4);
564 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
565 addr4
->sin_port
= cpu_to_be16(CIFS_PORT
);
567 cifs_dbg(FYI
, "%s: ipv4 %pI4\n", __func__
,
571 addr6
= (struct sockaddr_in6
*)&tmp_iface
.sockaddr
;
572 p6
= (struct iface_info_ipv6
*)p
->Buffer
;
573 addr6
->sin6_family
= AF_INET6
;
574 memcpy(&addr6
->sin6_addr
, &p6
->IPv6Address
, 16);
576 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
577 addr6
->sin6_flowinfo
= 0;
578 addr6
->sin6_scope_id
= 0;
579 addr6
->sin6_port
= cpu_to_be16(CIFS_PORT
);
581 cifs_dbg(FYI
, "%s: ipv6 %pI6\n", __func__
,
586 "%s: skipping unsupported socket family\n",
592 * The iface_list is assumed to be sorted by speed.
593 * Check if the new interface exists in that list.
594 * NEVER change iface. it could be in use.
595 * Add a new one instead
597 spin_lock(&ses
->iface_lock
);
598 iface
= niface
= NULL
;
599 list_for_each_entry_safe(iface
, niface
, &ses
->iface_list
,
601 ret
= iface_cmp(iface
, &tmp_iface
);
603 /* just get a ref so that it doesn't get picked/freed */
604 iface
->is_active
= 1;
605 kref_get(&iface
->refcount
);
606 spin_unlock(&ses
->iface_lock
);
608 } else if (ret
< 0) {
609 /* all remaining ifaces are slower */
610 kref_get(&iface
->refcount
);
614 spin_unlock(&ses
->iface_lock
);
616 /* no match. insert the entry in the list */
617 info
= kmalloc(sizeof(struct cifs_server_iface
),
623 memcpy(info
, &tmp_iface
, sizeof(tmp_iface
));
625 /* add this new entry to the list */
626 kref_init(&info
->refcount
);
629 cifs_dbg(FYI
, "%s: adding iface %zu\n", __func__
, ses
->iface_count
);
630 cifs_dbg(FYI
, "%s: speed %zu bps\n", __func__
, info
->speed
);
631 cifs_dbg(FYI
, "%s: capabilities 0x%08x\n", __func__
,
632 le32_to_cpu(p
->Capability
));
634 spin_lock(&ses
->iface_lock
);
635 if (!list_entry_is_head(iface
, &ses
->iface_list
, iface_head
)) {
636 list_add_tail(&info
->iface_head
, &iface
->iface_head
);
637 kref_put(&iface
->refcount
, release_iface
);
639 list_add_tail(&info
->iface_head
, &ses
->iface_list
);
640 spin_unlock(&ses
->iface_lock
);
643 ses
->iface_last_update
= jiffies
;
646 next
= le32_to_cpu(p
->Next
);
648 bytes_left
-= sizeof(*p
);
651 p
= (struct network_interface_info_ioctl_rsp
*)((u8
*)p
+next
);
656 cifs_dbg(VFS
, "%s: malformed interface info\n", __func__
);
661 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
662 if ((bytes_left
> 8) || p
->Next
)
663 cifs_dbg(VFS
, "%s: incomplete interface info\n", __func__
);
666 if (!ses
->iface_count
) {
676 SMB3_request_interfaces(const unsigned int xid
, struct cifs_tcon
*tcon
)
679 unsigned int ret_data_len
= 0;
680 struct network_interface_info_ioctl_rsp
*out_buf
= NULL
;
681 struct cifs_ses
*ses
= tcon
->ses
;
683 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
684 FSCTL_QUERY_NETWORK_INTERFACE_INFO
,
685 NULL
/* no data input */, 0 /* no data input */,
686 CIFSMaxBufSize
, (char **)&out_buf
, &ret_data_len
);
687 if (rc
== -EOPNOTSUPP
) {
689 "server does not support query network interfaces\n");
691 } else if (rc
!= 0) {
692 cifs_tcon_dbg(VFS
, "error %d on ioctl to get interface list\n", rc
);
696 rc
= parse_server_interfaces(out_buf
, ret_data_len
, ses
);
706 smb3_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
,
707 struct cifs_sb_info
*cifs_sb
)
710 __le16 srch_path
= 0; /* Null - open root of share */
711 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
712 struct cifs_open_parms oparms
;
714 struct cached_fid
*cfid
= NULL
;
717 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
718 oparms
.disposition
= FILE_OPEN
;
719 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
721 oparms
.reconnect
= false;
723 rc
= open_cached_dir(xid
, tcon
, "", cifs_sb
, false, &cfid
);
725 memcpy(&fid
, &cfid
->fid
, sizeof(struct cifs_fid
));
727 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
,
732 SMB3_request_interfaces(xid
, tcon
);
734 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
735 FS_ATTRIBUTE_INFORMATION
);
736 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
737 FS_DEVICE_INFORMATION
);
738 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
739 FS_VOLUME_INFORMATION
);
740 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
741 FS_SECTOR_SIZE_INFORMATION
); /* SMB3 specific */
743 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
745 close_cached_dir(cfid
);
749 smb2_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
,
750 struct cifs_sb_info
*cifs_sb
)
753 __le16 srch_path
= 0; /* Null - open root of share */
754 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
755 struct cifs_open_parms oparms
;
759 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
760 oparms
.disposition
= FILE_OPEN
;
761 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
763 oparms
.reconnect
= false;
765 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
,
770 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
771 FS_ATTRIBUTE_INFORMATION
);
772 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
773 FS_DEVICE_INFORMATION
);
774 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
778 smb2_is_path_accessible(const unsigned int xid
, struct cifs_tcon
*tcon
,
779 struct cifs_sb_info
*cifs_sb
, const char *full_path
)
783 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
784 struct cifs_open_parms oparms
;
786 struct cached_fid
*cfid
;
788 rc
= open_cached_dir(xid
, tcon
, full_path
, cifs_sb
, true, &cfid
);
790 if (cfid
->is_valid
) {
791 close_cached_dir(cfid
);
794 close_cached_dir(cfid
);
797 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
802 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
803 oparms
.disposition
= FILE_OPEN
;
804 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
806 oparms
.reconnect
= false;
808 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
, NULL
,
815 rc
= SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
821 smb2_get_srv_inum(const unsigned int xid
, struct cifs_tcon
*tcon
,
822 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
823 u64
*uniqueid
, FILE_ALL_INFO
*data
)
825 *uniqueid
= le64_to_cpu(data
->IndexNumber
);
830 smb2_query_file_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
831 struct cifs_fid
*fid
, FILE_ALL_INFO
*data
)
834 struct smb2_file_all_info
*smb2_data
;
836 smb2_data
= kzalloc(sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
838 if (smb2_data
== NULL
)
841 rc
= SMB2_query_info(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
,
844 move_smb2_info_to_cifs(data
, smb2_data
);
849 #ifdef CONFIG_CIFS_XATTR
851 move_smb2_ea_to_cifs(char *dst
, size_t dst_size
,
852 struct smb2_file_full_ea_info
*src
, size_t src_size
,
853 const unsigned char *ea_name
)
856 unsigned int ea_name_len
= ea_name
? strlen(ea_name
) : 0;
858 size_t buf_size
= dst_size
;
859 size_t name_len
, value_len
, user_name_len
;
861 while (src_size
> 0) {
862 name_len
= (size_t)src
->ea_name_length
;
863 value_len
= (size_t)le16_to_cpu(src
->ea_value_length
);
868 if (src_size
< 8 + name_len
+ 1 + value_len
) {
869 cifs_dbg(FYI
, "EA entry goes beyond length of list\n");
874 name
= &src
->ea_data
[0];
875 value
= &src
->ea_data
[src
->ea_name_length
+ 1];
878 if (ea_name_len
== name_len
&&
879 memcmp(ea_name
, name
, name_len
) == 0) {
883 if (dst_size
< value_len
) {
887 memcpy(dst
, value
, value_len
);
891 /* 'user.' plus a terminating null */
892 user_name_len
= 5 + 1 + name_len
;
895 /* skip copy - calc size only */
897 } else if (dst_size
>= user_name_len
) {
898 dst_size
-= user_name_len
;
899 memcpy(dst
, "user.", 5);
901 memcpy(dst
, src
->ea_data
, name_len
);
907 /* stop before overrun buffer */
913 if (!src
->next_entry_offset
)
916 if (src_size
< le32_to_cpu(src
->next_entry_offset
)) {
917 /* stop before overrun buffer */
921 src_size
-= le32_to_cpu(src
->next_entry_offset
);
922 src
= (void *)((char *)src
+
923 le32_to_cpu(src
->next_entry_offset
));
926 /* didn't find the named attribute */
935 smb2_query_eas(const unsigned int xid
, struct cifs_tcon
*tcon
,
936 const unsigned char *path
, const unsigned char *ea_name
,
937 char *ea_data
, size_t buf_size
,
938 struct cifs_sb_info
*cifs_sb
)
941 struct kvec rsp_iov
= {NULL
, 0};
942 int buftype
= CIFS_NO_BUFFER
;
943 struct smb2_query_info_rsp
*rsp
;
944 struct smb2_file_full_ea_info
*info
= NULL
;
946 rc
= smb2_query_info_compound(xid
, tcon
, path
,
948 FILE_FULL_EA_INFORMATION
,
951 MAX_SMB2_CREATE_RESPONSE_SIZE
-
952 MAX_SMB2_CLOSE_RESPONSE_SIZE
,
953 &rsp_iov
, &buftype
, cifs_sb
);
956 * If ea_name is NULL (listxattr) and there are no EAs,
957 * return 0 as it's not an error. Otherwise, the specified
958 * ea_name was not found.
960 if (!ea_name
&& rc
== -ENODATA
)
965 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
966 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
967 le32_to_cpu(rsp
->OutputBufferLength
),
969 sizeof(struct smb2_file_full_ea_info
));
973 info
= (struct smb2_file_full_ea_info
*)(
974 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
975 rc
= move_smb2_ea_to_cifs(ea_data
, buf_size
, info
,
976 le32_to_cpu(rsp
->OutputBufferLength
), ea_name
);
979 free_rsp_buf(buftype
, rsp_iov
.iov_base
);
985 smb2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
986 const char *path
, const char *ea_name
, const void *ea_value
,
987 const __u16 ea_value_len
, const struct nls_table
*nls_codepage
,
988 struct cifs_sb_info
*cifs_sb
)
990 struct cifs_ses
*ses
= tcon
->ses
;
991 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
992 __le16
*utf16_path
= NULL
;
993 int ea_name_len
= strlen(ea_name
);
994 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
996 struct smb_rqst rqst
[3];
998 struct kvec rsp_iov
[3];
999 struct kvec open_iov
[SMB2_CREATE_IOV_SIZE
];
1000 struct cifs_open_parms oparms
;
1001 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1002 struct cifs_fid fid
;
1003 struct kvec si_iov
[SMB2_SET_INFO_IOV_SIZE
];
1004 unsigned int size
[1];
1006 struct smb2_file_full_ea_info
*ea
= NULL
;
1007 struct kvec close_iov
[1];
1008 struct smb2_query_info_rsp
*rsp
;
1009 int rc
, used_len
= 0;
1011 if (smb3_encryption_required(tcon
))
1012 flags
|= CIFS_TRANSFORM_REQ
;
1014 if (ea_name_len
> 255)
1017 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
1021 memset(rqst
, 0, sizeof(rqst
));
1022 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
1023 memset(rsp_iov
, 0, sizeof(rsp_iov
));
1025 if (ses
->server
->ops
->query_all_EAs
) {
1027 rc
= ses
->server
->ops
->query_all_EAs(xid
, tcon
, path
,
1033 /* If we are adding a attribute we should first check
1034 * if there will be enough space available to store
1035 * the new EA. If not we should not add it since we
1036 * would not be able to even read the EAs back.
1038 rc
= smb2_query_info_compound(xid
, tcon
, path
,
1040 FILE_FULL_EA_INFORMATION
,
1043 MAX_SMB2_CREATE_RESPONSE_SIZE
-
1044 MAX_SMB2_CLOSE_RESPONSE_SIZE
,
1045 &rsp_iov
[1], &resp_buftype
[1], cifs_sb
);
1047 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
[1].iov_base
;
1048 used_len
= le32_to_cpu(rsp
->OutputBufferLength
);
1050 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
1051 resp_buftype
[1] = CIFS_NO_BUFFER
;
1052 memset(&rsp_iov
[1], 0, sizeof(rsp_iov
[1]));
1055 /* Use a fudge factor of 256 bytes in case we collide
1056 * with a different set_EAs command.
1058 if(CIFSMaxBufSize
- MAX_SMB2_CREATE_RESPONSE_SIZE
-
1059 MAX_SMB2_CLOSE_RESPONSE_SIZE
- 256 <
1060 used_len
+ ea_name_len
+ ea_value_len
+ 1) {
1068 memset(&open_iov
, 0, sizeof(open_iov
));
1069 rqst
[0].rq_iov
= open_iov
;
1070 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
1072 memset(&oparms
, 0, sizeof(oparms
));
1074 oparms
.desired_access
= FILE_WRITE_EA
;
1075 oparms
.disposition
= FILE_OPEN
;
1076 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
1078 oparms
.reconnect
= false;
1080 rc
= SMB2_open_init(tcon
, server
,
1081 &rqst
[0], &oplock
, &oparms
, utf16_path
);
1084 smb2_set_next_command(tcon
, &rqst
[0]);
1088 memset(&si_iov
, 0, sizeof(si_iov
));
1089 rqst
[1].rq_iov
= si_iov
;
1090 rqst
[1].rq_nvec
= 1;
1092 len
= sizeof(*ea
) + ea_name_len
+ ea_value_len
+ 1;
1093 ea
= kzalloc(len
, GFP_KERNEL
);
1099 ea
->ea_name_length
= ea_name_len
;
1100 ea
->ea_value_length
= cpu_to_le16(ea_value_len
);
1101 memcpy(ea
->ea_data
, ea_name
, ea_name_len
+ 1);
1102 memcpy(ea
->ea_data
+ ea_name_len
+ 1, ea_value
, ea_value_len
);
1107 rc
= SMB2_set_info_init(tcon
, server
,
1108 &rqst
[1], COMPOUND_FID
,
1109 COMPOUND_FID
, current
->tgid
,
1110 FILE_FULL_EA_INFORMATION
,
1111 SMB2_O_INFO_FILE
, 0, data
, size
);
1112 smb2_set_next_command(tcon
, &rqst
[1]);
1113 smb2_set_related(&rqst
[1]);
1117 memset(&close_iov
, 0, sizeof(close_iov
));
1118 rqst
[2].rq_iov
= close_iov
;
1119 rqst
[2].rq_nvec
= 1;
1120 rc
= SMB2_close_init(tcon
, server
,
1121 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
1122 smb2_set_related(&rqst
[2]);
1124 rc
= compound_send_recv(xid
, ses
, server
,
1126 resp_buftype
, rsp_iov
);
1127 /* no need to bump num_remote_opens because handle immediately closed */
1132 SMB2_open_free(&rqst
[0]);
1133 SMB2_set_info_free(&rqst
[1]);
1134 SMB2_close_free(&rqst
[2]);
1135 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
1136 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
1137 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
1143 smb2_can_echo(struct TCP_Server_Info
*server
)
1145 return server
->echoes
;
1149 smb2_clear_stats(struct cifs_tcon
*tcon
)
1153 for (i
= 0; i
< NUMBER_OF_SMB2_COMMANDS
; i
++) {
1154 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_sent
[i
], 0);
1155 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_failed
[i
], 0);
1160 smb2_dump_share_caps(struct seq_file
*m
, struct cifs_tcon
*tcon
)
1162 seq_puts(m
, "\n\tShare Capabilities:");
1163 if (tcon
->capabilities
& SMB2_SHARE_CAP_DFS
)
1164 seq_puts(m
, " DFS,");
1165 if (tcon
->capabilities
& SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
)
1166 seq_puts(m
, " CONTINUOUS AVAILABILITY,");
1167 if (tcon
->capabilities
& SMB2_SHARE_CAP_SCALEOUT
)
1168 seq_puts(m
, " SCALEOUT,");
1169 if (tcon
->capabilities
& SMB2_SHARE_CAP_CLUSTER
)
1170 seq_puts(m
, " CLUSTER,");
1171 if (tcon
->capabilities
& SMB2_SHARE_CAP_ASYMMETRIC
)
1172 seq_puts(m
, " ASYMMETRIC,");
1173 if (tcon
->capabilities
== 0)
1174 seq_puts(m
, " None");
1175 if (tcon
->ss_flags
& SSINFO_FLAGS_ALIGNED_DEVICE
)
1176 seq_puts(m
, " Aligned,");
1177 if (tcon
->ss_flags
& SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE
)
1178 seq_puts(m
, " Partition Aligned,");
1179 if (tcon
->ss_flags
& SSINFO_FLAGS_NO_SEEK_PENALTY
)
1180 seq_puts(m
, " SSD,");
1181 if (tcon
->ss_flags
& SSINFO_FLAGS_TRIM_ENABLED
)
1182 seq_puts(m
, " TRIM-support,");
1184 seq_printf(m
, "\tShare Flags: 0x%x", tcon
->share_flags
);
1185 seq_printf(m
, "\n\ttid: 0x%x", tcon
->tid
);
1186 if (tcon
->perf_sector_size
)
1187 seq_printf(m
, "\tOptimal sector size: 0x%x",
1188 tcon
->perf_sector_size
);
1189 seq_printf(m
, "\tMaximal Access: 0x%x", tcon
->maximal_access
);
1193 smb2_print_stats(struct seq_file
*m
, struct cifs_tcon
*tcon
)
1195 atomic_t
*sent
= tcon
->stats
.smb2_stats
.smb2_com_sent
;
1196 atomic_t
*failed
= tcon
->stats
.smb2_stats
.smb2_com_failed
;
1199 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1200 * totals (requests sent) since those SMBs are per-session not per tcon
1202 seq_printf(m
, "\nBytes read: %llu Bytes written: %llu",
1203 (long long)(tcon
->bytes_read
),
1204 (long long)(tcon
->bytes_written
));
1205 seq_printf(m
, "\nOpen files: %d total (local), %d open on server",
1206 atomic_read(&tcon
->num_local_opens
),
1207 atomic_read(&tcon
->num_remote_opens
));
1208 seq_printf(m
, "\nTreeConnects: %d total %d failed",
1209 atomic_read(&sent
[SMB2_TREE_CONNECT_HE
]),
1210 atomic_read(&failed
[SMB2_TREE_CONNECT_HE
]));
1211 seq_printf(m
, "\nTreeDisconnects: %d total %d failed",
1212 atomic_read(&sent
[SMB2_TREE_DISCONNECT_HE
]),
1213 atomic_read(&failed
[SMB2_TREE_DISCONNECT_HE
]));
1214 seq_printf(m
, "\nCreates: %d total %d failed",
1215 atomic_read(&sent
[SMB2_CREATE_HE
]),
1216 atomic_read(&failed
[SMB2_CREATE_HE
]));
1217 seq_printf(m
, "\nCloses: %d total %d failed",
1218 atomic_read(&sent
[SMB2_CLOSE_HE
]),
1219 atomic_read(&failed
[SMB2_CLOSE_HE
]));
1220 seq_printf(m
, "\nFlushes: %d total %d failed",
1221 atomic_read(&sent
[SMB2_FLUSH_HE
]),
1222 atomic_read(&failed
[SMB2_FLUSH_HE
]));
1223 seq_printf(m
, "\nReads: %d total %d failed",
1224 atomic_read(&sent
[SMB2_READ_HE
]),
1225 atomic_read(&failed
[SMB2_READ_HE
]));
1226 seq_printf(m
, "\nWrites: %d total %d failed",
1227 atomic_read(&sent
[SMB2_WRITE_HE
]),
1228 atomic_read(&failed
[SMB2_WRITE_HE
]));
1229 seq_printf(m
, "\nLocks: %d total %d failed",
1230 atomic_read(&sent
[SMB2_LOCK_HE
]),
1231 atomic_read(&failed
[SMB2_LOCK_HE
]));
1232 seq_printf(m
, "\nIOCTLs: %d total %d failed",
1233 atomic_read(&sent
[SMB2_IOCTL_HE
]),
1234 atomic_read(&failed
[SMB2_IOCTL_HE
]));
1235 seq_printf(m
, "\nQueryDirectories: %d total %d failed",
1236 atomic_read(&sent
[SMB2_QUERY_DIRECTORY_HE
]),
1237 atomic_read(&failed
[SMB2_QUERY_DIRECTORY_HE
]));
1238 seq_printf(m
, "\nChangeNotifies: %d total %d failed",
1239 atomic_read(&sent
[SMB2_CHANGE_NOTIFY_HE
]),
1240 atomic_read(&failed
[SMB2_CHANGE_NOTIFY_HE
]));
1241 seq_printf(m
, "\nQueryInfos: %d total %d failed",
1242 atomic_read(&sent
[SMB2_QUERY_INFO_HE
]),
1243 atomic_read(&failed
[SMB2_QUERY_INFO_HE
]));
1244 seq_printf(m
, "\nSetInfos: %d total %d failed",
1245 atomic_read(&sent
[SMB2_SET_INFO_HE
]),
1246 atomic_read(&failed
[SMB2_SET_INFO_HE
]));
1247 seq_printf(m
, "\nOplockBreaks: %d sent %d failed",
1248 atomic_read(&sent
[SMB2_OPLOCK_BREAK_HE
]),
1249 atomic_read(&failed
[SMB2_OPLOCK_BREAK_HE
]));
1253 smb2_set_fid(struct cifsFileInfo
*cfile
, struct cifs_fid
*fid
, __u32 oplock
)
1255 struct cifsInodeInfo
*cinode
= CIFS_I(d_inode(cfile
->dentry
));
1256 struct TCP_Server_Info
*server
= tlink_tcon(cfile
->tlink
)->ses
->server
;
1258 cfile
->fid
.persistent_fid
= fid
->persistent_fid
;
1259 cfile
->fid
.volatile_fid
= fid
->volatile_fid
;
1260 cfile
->fid
.access
= fid
->access
;
1261 #ifdef CONFIG_CIFS_DEBUG2
1262 cfile
->fid
.mid
= fid
->mid
;
1263 #endif /* CIFS_DEBUG2 */
1264 server
->ops
->set_oplock_level(cinode
, oplock
, fid
->epoch
,
1266 cinode
->can_cache_brlcks
= CIFS_CACHE_WRITE(cinode
);
1267 memcpy(cfile
->fid
.create_guid
, fid
->create_guid
, 16);
1271 smb2_close_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
1272 struct cifs_fid
*fid
)
1274 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
1278 smb2_close_getattr(const unsigned int xid
, struct cifs_tcon
*tcon
,
1279 struct cifsFileInfo
*cfile
)
1281 struct smb2_file_network_open_info file_inf
;
1282 struct inode
*inode
;
1285 rc
= __SMB2_close(xid
, tcon
, cfile
->fid
.persistent_fid
,
1286 cfile
->fid
.volatile_fid
, &file_inf
);
1290 inode
= d_inode(cfile
->dentry
);
1292 spin_lock(&inode
->i_lock
);
1293 CIFS_I(inode
)->time
= jiffies
;
1295 /* Creation time should not need to be updated on close */
1296 if (file_inf
.LastWriteTime
)
1297 inode
->i_mtime
= cifs_NTtimeToUnix(file_inf
.LastWriteTime
);
1298 if (file_inf
.ChangeTime
)
1299 inode
->i_ctime
= cifs_NTtimeToUnix(file_inf
.ChangeTime
);
1300 if (file_inf
.LastAccessTime
)
1301 inode
->i_atime
= cifs_NTtimeToUnix(file_inf
.LastAccessTime
);
1304 * i_blocks is not related to (i_size / i_blksize),
1305 * but instead 512 byte (2**9) size is required for
1306 * calculating num blocks.
1308 if (le64_to_cpu(file_inf
.AllocationSize
) > 4096)
1310 (512 - 1 + le64_to_cpu(file_inf
.AllocationSize
)) >> 9;
1312 /* End of file and Attributes should not have to be updated on close */
1313 spin_unlock(&inode
->i_lock
);
1317 SMB2_request_res_key(const unsigned int xid
, struct cifs_tcon
*tcon
,
1318 u64 persistent_fid
, u64 volatile_fid
,
1319 struct copychunk_ioctl
*pcchunk
)
1322 unsigned int ret_data_len
;
1323 struct resume_key_req
*res_key
;
1325 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
1326 FSCTL_SRV_REQUEST_RESUME_KEY
, NULL
, 0 /* no input */,
1327 CIFSMaxBufSize
, (char **)&res_key
, &ret_data_len
);
1329 if (rc
== -EOPNOTSUPP
) {
1330 pr_warn_once("Server share %s does not support copy range\n", tcon
->treeName
);
1331 goto req_res_key_exit
;
1333 cifs_tcon_dbg(VFS
, "refcpy ioctl error %d getting resume key\n", rc
);
1334 goto req_res_key_exit
;
1336 if (ret_data_len
< sizeof(struct resume_key_req
)) {
1337 cifs_tcon_dbg(VFS
, "Invalid refcopy resume key length\n");
1339 goto req_res_key_exit
;
1341 memcpy(pcchunk
->SourceKey
, res_key
->ResumeKey
, COPY_CHUNK_RES_KEY_SIZE
);
1349 struct smb_rqst rqst
[3];
1350 struct kvec rsp_iov
[3];
1351 struct kvec open_iov
[SMB2_CREATE_IOV_SIZE
];
1352 struct kvec qi_iov
[1];
1353 struct kvec io_iov
[SMB2_IOCTL_IOV_SIZE
];
1354 struct kvec si_iov
[SMB2_SET_INFO_IOV_SIZE
];
1355 struct kvec close_iov
[1];
1359 smb2_ioctl_query_info(const unsigned int xid
,
1360 struct cifs_tcon
*tcon
,
1361 struct cifs_sb_info
*cifs_sb
,
1362 __le16
*path
, int is_dir
,
1365 struct iqi_vars
*vars
;
1366 struct smb_rqst
*rqst
;
1367 struct kvec
*rsp_iov
;
1368 struct cifs_ses
*ses
= tcon
->ses
;
1369 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
1370 char __user
*arg
= (char __user
*)p
;
1371 struct smb_query_info qi
;
1372 struct smb_query_info __user
*pqi
;
1374 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
1375 struct smb2_query_info_rsp
*qi_rsp
= NULL
;
1376 struct smb2_ioctl_rsp
*io_rsp
= NULL
;
1377 void *buffer
= NULL
;
1378 int resp_buftype
[3];
1379 struct cifs_open_parms oparms
;
1380 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1381 struct cifs_fid fid
;
1382 unsigned int size
[2];
1384 int create_options
= is_dir
? CREATE_NOT_FILE
: CREATE_NOT_DIR
;
1385 void (*free_req1_func
)(struct smb_rqst
*r
);
1387 vars
= kzalloc(sizeof(*vars
), GFP_ATOMIC
);
1390 rqst
= &vars
->rqst
[0];
1391 rsp_iov
= &vars
->rsp_iov
[0];
1393 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
1395 if (copy_from_user(&qi
, arg
, sizeof(struct smb_query_info
))) {
1399 if (qi
.output_buffer_length
> 1024) {
1404 if (!ses
|| !server
) {
1409 if (smb3_encryption_required(tcon
))
1410 flags
|= CIFS_TRANSFORM_REQ
;
1412 if (qi
.output_buffer_length
) {
1413 buffer
= memdup_user(arg
+ sizeof(struct smb_query_info
), qi
.output_buffer_length
);
1414 if (IS_ERR(buffer
)) {
1415 rc
= PTR_ERR(buffer
);
1421 rqst
[0].rq_iov
= &vars
->open_iov
[0];
1422 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
1424 memset(&oparms
, 0, sizeof(oparms
));
1426 oparms
.disposition
= FILE_OPEN
;
1427 oparms
.create_options
= cifs_create_options(cifs_sb
, create_options
);
1429 oparms
.reconnect
= false;
1431 if (qi
.flags
& PASSTHRU_FSCTL
) {
1432 switch (qi
.info_type
& FSCTL_DEVICE_ACCESS_MASK
) {
1433 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS
:
1434 oparms
.desired_access
= FILE_READ_DATA
| FILE_WRITE_DATA
| FILE_READ_ATTRIBUTES
| SYNCHRONIZE
;
1436 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS
:
1437 oparms
.desired_access
= GENERIC_ALL
;
1439 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS
:
1440 oparms
.desired_access
= GENERIC_READ
;
1442 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS
:
1443 oparms
.desired_access
= GENERIC_WRITE
;
1446 } else if (qi
.flags
& PASSTHRU_SET_INFO
) {
1447 oparms
.desired_access
= GENERIC_WRITE
;
1449 oparms
.desired_access
= FILE_READ_ATTRIBUTES
| READ_CONTROL
;
1452 rc
= SMB2_open_init(tcon
, server
,
1453 &rqst
[0], &oplock
, &oparms
, path
);
1455 goto free_output_buffer
;
1456 smb2_set_next_command(tcon
, &rqst
[0]);
1459 if (qi
.flags
& PASSTHRU_FSCTL
) {
1460 /* Can eventually relax perm check since server enforces too */
1461 if (!capable(CAP_SYS_ADMIN
)) {
1465 rqst
[1].rq_iov
= &vars
->io_iov
[0];
1466 rqst
[1].rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
1468 rc
= SMB2_ioctl_init(tcon
, server
, &rqst
[1], COMPOUND_FID
, COMPOUND_FID
,
1469 qi
.info_type
, buffer
, qi
.output_buffer_length
,
1470 CIFSMaxBufSize
- MAX_SMB2_CREATE_RESPONSE_SIZE
-
1471 MAX_SMB2_CLOSE_RESPONSE_SIZE
);
1472 free_req1_func
= SMB2_ioctl_free
;
1473 } else if (qi
.flags
== PASSTHRU_SET_INFO
) {
1474 /* Can eventually relax perm check since server enforces too */
1475 if (!capable(CAP_SYS_ADMIN
)) {
1479 if (qi
.output_buffer_length
< 8) {
1483 rqst
[1].rq_iov
= &vars
->si_iov
[0];
1484 rqst
[1].rq_nvec
= 1;
1486 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1490 rc
= SMB2_set_info_init(tcon
, server
, &rqst
[1], COMPOUND_FID
, COMPOUND_FID
,
1491 current
->tgid
, FILE_END_OF_FILE_INFORMATION
,
1492 SMB2_O_INFO_FILE
, 0, data
, size
);
1493 free_req1_func
= SMB2_set_info_free
;
1494 } else if (qi
.flags
== PASSTHRU_QUERY_INFO
) {
1495 rqst
[1].rq_iov
= &vars
->qi_iov
[0];
1496 rqst
[1].rq_nvec
= 1;
1498 rc
= SMB2_query_info_init(tcon
, server
,
1499 &rqst
[1], COMPOUND_FID
,
1500 COMPOUND_FID
, qi
.file_info_class
,
1501 qi
.info_type
, qi
.additional_information
,
1502 qi
.input_buffer_length
,
1503 qi
.output_buffer_length
, buffer
);
1504 free_req1_func
= SMB2_query_info_free
;
1505 } else { /* unknown flags */
1506 cifs_tcon_dbg(VFS
, "Invalid passthru query flags: 0x%x\n",
1513 smb2_set_next_command(tcon
, &rqst
[1]);
1514 smb2_set_related(&rqst
[1]);
1517 rqst
[2].rq_iov
= &vars
->close_iov
[0];
1518 rqst
[2].rq_nvec
= 1;
1520 rc
= SMB2_close_init(tcon
, server
,
1521 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
1524 smb2_set_related(&rqst
[2]);
1526 rc
= compound_send_recv(xid
, ses
, server
,
1528 resp_buftype
, rsp_iov
);
1532 /* No need to bump num_remote_opens since handle immediately closed */
1533 if (qi
.flags
& PASSTHRU_FSCTL
) {
1534 pqi
= (struct smb_query_info __user
*)arg
;
1535 io_rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
[1].iov_base
;
1536 if (le32_to_cpu(io_rsp
->OutputCount
) < qi
.input_buffer_length
)
1537 qi
.input_buffer_length
= le32_to_cpu(io_rsp
->OutputCount
);
1538 if (qi
.input_buffer_length
> 0 &&
1539 le32_to_cpu(io_rsp
->OutputOffset
) + qi
.input_buffer_length
1540 > rsp_iov
[1].iov_len
) {
1545 if (copy_to_user(&pqi
->input_buffer_length
,
1546 &qi
.input_buffer_length
,
1547 sizeof(qi
.input_buffer_length
))) {
1552 if (copy_to_user((void __user
*)pqi
+ sizeof(struct smb_query_info
),
1553 (const void *)io_rsp
+ le32_to_cpu(io_rsp
->OutputOffset
),
1554 qi
.input_buffer_length
))
1557 pqi
= (struct smb_query_info __user
*)arg
;
1558 qi_rsp
= (struct smb2_query_info_rsp
*)rsp_iov
[1].iov_base
;
1559 if (le32_to_cpu(qi_rsp
->OutputBufferLength
) < qi
.input_buffer_length
)
1560 qi
.input_buffer_length
= le32_to_cpu(qi_rsp
->OutputBufferLength
);
1561 if (copy_to_user(&pqi
->input_buffer_length
,
1562 &qi
.input_buffer_length
,
1563 sizeof(qi
.input_buffer_length
))) {
1568 if (copy_to_user(pqi
+ 1, qi_rsp
->Buffer
,
1569 qi
.input_buffer_length
))
1574 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
1575 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
1576 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
1577 SMB2_close_free(&rqst
[2]);
1579 free_req1_func(&rqst
[1]);
1581 SMB2_open_free(&rqst
[0]);
1590 smb2_copychunk_range(const unsigned int xid
,
1591 struct cifsFileInfo
*srcfile
,
1592 struct cifsFileInfo
*trgtfile
, u64 src_off
,
1593 u64 len
, u64 dest_off
)
1596 unsigned int ret_data_len
;
1597 struct copychunk_ioctl
*pcchunk
;
1598 struct copychunk_ioctl_rsp
*retbuf
= NULL
;
1599 struct cifs_tcon
*tcon
;
1600 int chunks_copied
= 0;
1601 bool chunk_sizes_updated
= false;
1602 ssize_t bytes_written
, total_bytes_written
= 0;
1604 pcchunk
= kmalloc(sizeof(struct copychunk_ioctl
), GFP_KERNEL
);
1605 if (pcchunk
== NULL
)
1608 cifs_dbg(FYI
, "%s: about to call request res key\n", __func__
);
1609 /* Request a key from the server to identify the source of the copy */
1610 rc
= SMB2_request_res_key(xid
, tlink_tcon(srcfile
->tlink
),
1611 srcfile
->fid
.persistent_fid
,
1612 srcfile
->fid
.volatile_fid
, pcchunk
);
1614 /* Note: request_res_key sets res_key null only if rc !=0 */
1618 /* For now array only one chunk long, will make more flexible later */
1619 pcchunk
->ChunkCount
= cpu_to_le32(1);
1620 pcchunk
->Reserved
= 0;
1621 pcchunk
->Reserved2
= 0;
1623 tcon
= tlink_tcon(trgtfile
->tlink
);
1626 pcchunk
->SourceOffset
= cpu_to_le64(src_off
);
1627 pcchunk
->TargetOffset
= cpu_to_le64(dest_off
);
1629 cpu_to_le32(min_t(u32
, len
, tcon
->max_bytes_chunk
));
1631 /* Request server copy to target from src identified by key */
1634 rc
= SMB2_ioctl(xid
, tcon
, trgtfile
->fid
.persistent_fid
,
1635 trgtfile
->fid
.volatile_fid
, FSCTL_SRV_COPYCHUNK_WRITE
,
1636 (char *)pcchunk
, sizeof(struct copychunk_ioctl
),
1637 CIFSMaxBufSize
, (char **)&retbuf
, &ret_data_len
);
1640 sizeof(struct copychunk_ioctl_rsp
)) {
1641 cifs_tcon_dbg(VFS
, "Invalid cchunk response size\n");
1645 if (retbuf
->TotalBytesWritten
== 0) {
1646 cifs_dbg(FYI
, "no bytes copied\n");
1651 * Check if server claimed to write more than we asked
1653 if (le32_to_cpu(retbuf
->TotalBytesWritten
) >
1654 le32_to_cpu(pcchunk
->Length
)) {
1655 cifs_tcon_dbg(VFS
, "Invalid copy chunk response\n");
1659 if (le32_to_cpu(retbuf
->ChunksWritten
) != 1) {
1660 cifs_tcon_dbg(VFS
, "Invalid num chunks written\n");
1666 bytes_written
= le32_to_cpu(retbuf
->TotalBytesWritten
);
1667 src_off
+= bytes_written
;
1668 dest_off
+= bytes_written
;
1669 len
-= bytes_written
;
1670 total_bytes_written
+= bytes_written
;
1672 cifs_dbg(FYI
, "Chunks %d PartialChunk %d Total %zu\n",
1673 le32_to_cpu(retbuf
->ChunksWritten
),
1674 le32_to_cpu(retbuf
->ChunkBytesWritten
),
1676 } else if (rc
== -EINVAL
) {
1677 if (ret_data_len
!= sizeof(struct copychunk_ioctl_rsp
))
1680 cifs_dbg(FYI
, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1681 le32_to_cpu(retbuf
->ChunksWritten
),
1682 le32_to_cpu(retbuf
->ChunkBytesWritten
),
1683 le32_to_cpu(retbuf
->TotalBytesWritten
));
1686 * Check if this is the first request using these sizes,
1687 * (ie check if copy succeed once with original sizes
1688 * and check if the server gave us different sizes after
1689 * we already updated max sizes on previous request).
1690 * if not then why is the server returning an error now
1692 if ((chunks_copied
!= 0) || chunk_sizes_updated
)
1695 /* Check that server is not asking us to grow size */
1696 if (le32_to_cpu(retbuf
->ChunkBytesWritten
) <
1697 tcon
->max_bytes_chunk
)
1698 tcon
->max_bytes_chunk
=
1699 le32_to_cpu(retbuf
->ChunkBytesWritten
);
1701 goto cchunk_out
; /* server gave us bogus size */
1703 /* No need to change MaxChunks since already set to 1 */
1704 chunk_sizes_updated
= true;
1715 return total_bytes_written
;
1719 smb2_flush_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
1720 struct cifs_fid
*fid
)
1722 return SMB2_flush(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
1726 smb2_read_data_offset(char *buf
)
1728 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
1730 return rsp
->DataOffset
;
1734 smb2_read_data_length(char *buf
, bool in_remaining
)
1736 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
1739 return le32_to_cpu(rsp
->DataRemaining
);
1741 return le32_to_cpu(rsp
->DataLength
);
1746 smb2_sync_read(const unsigned int xid
, struct cifs_fid
*pfid
,
1747 struct cifs_io_parms
*parms
, unsigned int *bytes_read
,
1748 char **buf
, int *buf_type
)
1750 parms
->persistent_fid
= pfid
->persistent_fid
;
1751 parms
->volatile_fid
= pfid
->volatile_fid
;
1752 return SMB2_read(xid
, parms
, bytes_read
, buf
, buf_type
);
1756 smb2_sync_write(const unsigned int xid
, struct cifs_fid
*pfid
,
1757 struct cifs_io_parms
*parms
, unsigned int *written
,
1758 struct kvec
*iov
, unsigned long nr_segs
)
1761 parms
->persistent_fid
= pfid
->persistent_fid
;
1762 parms
->volatile_fid
= pfid
->volatile_fid
;
1763 return SMB2_write(xid
, parms
, written
, iov
, nr_segs
);
1766 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1767 static bool smb2_set_sparse(const unsigned int xid
, struct cifs_tcon
*tcon
,
1768 struct cifsFileInfo
*cfile
, struct inode
*inode
, __u8 setsparse
)
1770 struct cifsInodeInfo
*cifsi
;
1773 cifsi
= CIFS_I(inode
);
1775 /* if file already sparse don't bother setting sparse again */
1776 if ((cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) && setsparse
)
1777 return true; /* already sparse */
1779 if (!(cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) && !setsparse
)
1780 return true; /* already not sparse */
1783 * Can't check for sparse support on share the usual way via the
1784 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1785 * since Samba server doesn't set the flag on the share, yet
1786 * supports the set sparse FSCTL and returns sparse correctly
1787 * in the file attributes. If we fail setting sparse though we
1788 * mark that server does not support sparse files for this share
1789 * to avoid repeatedly sending the unsupported fsctl to server
1790 * if the file is repeatedly extended.
1792 if (tcon
->broken_sparse_sup
)
1795 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
1796 cfile
->fid
.volatile_fid
, FSCTL_SET_SPARSE
,
1797 &setsparse
, 1, CIFSMaxBufSize
, NULL
, NULL
);
1799 tcon
->broken_sparse_sup
= true;
1800 cifs_dbg(FYI
, "set sparse rc = %d\n", rc
);
1805 cifsi
->cifsAttrs
|= FILE_ATTRIBUTE_SPARSE_FILE
;
1807 cifsi
->cifsAttrs
&= (~FILE_ATTRIBUTE_SPARSE_FILE
);
1813 smb2_set_file_size(const unsigned int xid
, struct cifs_tcon
*tcon
,
1814 struct cifsFileInfo
*cfile
, __u64 size
, bool set_alloc
)
1816 __le64 eof
= cpu_to_le64(size
);
1817 struct inode
*inode
;
1820 * If extending file more than one page make sparse. Many Linux fs
1821 * make files sparse by default when extending via ftruncate
1823 inode
= d_inode(cfile
->dentry
);
1825 if (!set_alloc
&& (size
> inode
->i_size
+ 8192)) {
1826 __u8 set_sparse
= 1;
1828 /* whether set sparse succeeds or not, extend the file */
1829 smb2_set_sparse(xid
, tcon
, cfile
, inode
, set_sparse
);
1832 return SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
1833 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
1837 smb2_duplicate_extents(const unsigned int xid
,
1838 struct cifsFileInfo
*srcfile
,
1839 struct cifsFileInfo
*trgtfile
, u64 src_off
,
1840 u64 len
, u64 dest_off
)
1843 unsigned int ret_data_len
;
1844 struct inode
*inode
;
1845 struct duplicate_extents_to_file dup_ext_buf
;
1846 struct cifs_tcon
*tcon
= tlink_tcon(trgtfile
->tlink
);
1848 /* server fileays advertise duplicate extent support with this flag */
1849 if ((le32_to_cpu(tcon
->fsAttrInfo
.Attributes
) &
1850 FILE_SUPPORTS_BLOCK_REFCOUNTING
) == 0)
1853 dup_ext_buf
.VolatileFileHandle
= srcfile
->fid
.volatile_fid
;
1854 dup_ext_buf
.PersistentFileHandle
= srcfile
->fid
.persistent_fid
;
1855 dup_ext_buf
.SourceFileOffset
= cpu_to_le64(src_off
);
1856 dup_ext_buf
.TargetFileOffset
= cpu_to_le64(dest_off
);
1857 dup_ext_buf
.ByteCount
= cpu_to_le64(len
);
1858 cifs_dbg(FYI
, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1859 src_off
, dest_off
, len
);
1861 inode
= d_inode(trgtfile
->dentry
);
1862 if (inode
->i_size
< dest_off
+ len
) {
1863 rc
= smb2_set_file_size(xid
, tcon
, trgtfile
, dest_off
+ len
, false);
1865 goto duplicate_extents_out
;
1868 * Although also could set plausible allocation size (i_blocks)
1869 * here in addition to setting the file size, in reflink
1870 * it is likely that the target file is sparse. Its allocation
1871 * size will be queried on next revalidate, but it is important
1872 * to make sure that file's cached size is updated immediately
1874 cifs_setsize(inode
, dest_off
+ len
);
1876 rc
= SMB2_ioctl(xid
, tcon
, trgtfile
->fid
.persistent_fid
,
1877 trgtfile
->fid
.volatile_fid
,
1878 FSCTL_DUPLICATE_EXTENTS_TO_FILE
,
1879 (char *)&dup_ext_buf
,
1880 sizeof(struct duplicate_extents_to_file
),
1881 CIFSMaxBufSize
, NULL
,
1884 if (ret_data_len
> 0)
1885 cifs_dbg(FYI
, "Non-zero response length in duplicate extents\n");
1887 duplicate_extents_out
:
1892 smb2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
1893 struct cifsFileInfo
*cfile
)
1895 return SMB2_set_compression(xid
, tcon
, cfile
->fid
.persistent_fid
,
1896 cfile
->fid
.volatile_fid
);
1900 smb3_set_integrity(const unsigned int xid
, struct cifs_tcon
*tcon
,
1901 struct cifsFileInfo
*cfile
)
1903 struct fsctl_set_integrity_information_req integr_info
;
1904 unsigned int ret_data_len
;
1906 integr_info
.ChecksumAlgorithm
= cpu_to_le16(CHECKSUM_TYPE_UNCHANGED
);
1907 integr_info
.Flags
= 0;
1908 integr_info
.Reserved
= 0;
1910 return SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
1911 cfile
->fid
.volatile_fid
,
1912 FSCTL_SET_INTEGRITY_INFORMATION
,
1913 (char *)&integr_info
,
1914 sizeof(struct fsctl_set_integrity_information_req
),
1915 CIFSMaxBufSize
, NULL
,
1920 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1921 #define GMT_TOKEN_SIZE 50
1923 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1926 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1927 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1930 smb3_enum_snapshots(const unsigned int xid
, struct cifs_tcon
*tcon
,
1931 struct cifsFileInfo
*cfile
, void __user
*ioc_buf
)
1933 char *retbuf
= NULL
;
1934 unsigned int ret_data_len
= 0;
1936 u32 max_response_size
;
1937 struct smb_snapshot_array snapshot_in
;
1940 * On the first query to enumerate the list of snapshots available
1941 * for this volume the buffer begins with 0 (number of snapshots
1942 * which can be returned is zero since at that point we do not know
1943 * how big the buffer needs to be). On the second query,
1944 * it (ret_data_len) is set to number of snapshots so we can
1945 * know to set the maximum response size larger (see below).
1947 if (get_user(ret_data_len
, (unsigned int __user
*)ioc_buf
))
1951 * Note that for snapshot queries that servers like Azure expect that
1952 * the first query be minimal size (and just used to get the number/size
1953 * of previous versions) so response size must be specified as EXACTLY
1954 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1957 if (ret_data_len
== 0)
1958 max_response_size
= MIN_SNAPSHOT_ARRAY_SIZE
;
1960 max_response_size
= CIFSMaxBufSize
;
1962 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
1963 cfile
->fid
.volatile_fid
,
1964 FSCTL_SRV_ENUMERATE_SNAPSHOTS
,
1965 NULL
, 0 /* no input data */, max_response_size
,
1968 cifs_dbg(FYI
, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1973 if (ret_data_len
&& (ioc_buf
!= NULL
) && (retbuf
!= NULL
)) {
1975 if (copy_from_user(&snapshot_in
, ioc_buf
,
1976 sizeof(struct smb_snapshot_array
))) {
1983 * Check for min size, ie not large enough to fit even one GMT
1984 * token (snapshot). On the first ioctl some users may pass in
1985 * smaller size (or zero) to simply get the size of the array
1986 * so the user space caller can allocate sufficient memory
1987 * and retry the ioctl again with larger array size sufficient
1988 * to hold all of the snapshot GMT tokens on the second try.
1990 if (snapshot_in
.snapshot_array_size
< GMT_TOKEN_SIZE
)
1991 ret_data_len
= sizeof(struct smb_snapshot_array
);
1994 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1995 * the snapshot array (of 50 byte GMT tokens) each
1996 * representing an available previous version of the data
1998 if (ret_data_len
> (snapshot_in
.snapshot_array_size
+
1999 sizeof(struct smb_snapshot_array
)))
2000 ret_data_len
= snapshot_in
.snapshot_array_size
+
2001 sizeof(struct smb_snapshot_array
);
2003 if (copy_to_user(ioc_buf
, retbuf
, ret_data_len
))
2014 smb3_notify(const unsigned int xid
, struct file
*pfile
,
2015 void __user
*ioc_buf
)
2017 struct smb3_notify notify
;
2018 struct dentry
*dentry
= pfile
->f_path
.dentry
;
2019 struct inode
*inode
= file_inode(pfile
);
2020 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
2021 struct cifs_open_parms oparms
;
2022 struct cifs_fid fid
;
2023 struct cifs_tcon
*tcon
;
2024 const unsigned char *path
;
2025 void *page
= alloc_dentry_path();
2026 __le16
*utf16_path
= NULL
;
2027 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2030 path
= build_path_from_dentry(dentry
, page
);
2036 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
2037 if (utf16_path
== NULL
) {
2042 if (copy_from_user(¬ify
, ioc_buf
, sizeof(struct smb3_notify
))) {
2047 tcon
= cifs_sb_master_tcon(cifs_sb
);
2049 oparms
.desired_access
= FILE_READ_ATTRIBUTES
| FILE_READ_DATA
;
2050 oparms
.disposition
= FILE_OPEN
;
2051 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
2053 oparms
.reconnect
= false;
2055 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
, NULL
,
2060 rc
= SMB2_change_notify(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
2061 notify
.watch_tree
, notify
.completion_filter
);
2063 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
2065 cifs_dbg(FYI
, "change notify for path %s rc %d\n", path
, rc
);
2068 free_dentry_path(page
);
2074 smb2_query_dir_first(const unsigned int xid
, struct cifs_tcon
*tcon
,
2075 const char *path
, struct cifs_sb_info
*cifs_sb
,
2076 struct cifs_fid
*fid
, __u16 search_flags
,
2077 struct cifs_search_info
*srch_inf
)
2080 struct smb_rqst rqst
[2];
2081 struct kvec rsp_iov
[2];
2082 int resp_buftype
[2];
2083 struct kvec open_iov
[SMB2_CREATE_IOV_SIZE
];
2084 struct kvec qd_iov
[SMB2_QUERY_DIRECTORY_IOV_SIZE
];
2086 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2087 struct cifs_open_parms oparms
;
2088 struct smb2_query_directory_rsp
*qd_rsp
= NULL
;
2089 struct smb2_create_rsp
*op_rsp
= NULL
;
2090 struct TCP_Server_Info
*server
= cifs_pick_channel(tcon
->ses
);
2091 int retry_count
= 0;
2093 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
2097 if (smb3_encryption_required(tcon
))
2098 flags
|= CIFS_TRANSFORM_REQ
;
2100 memset(rqst
, 0, sizeof(rqst
));
2101 resp_buftype
[0] = resp_buftype
[1] = CIFS_NO_BUFFER
;
2102 memset(rsp_iov
, 0, sizeof(rsp_iov
));
2105 memset(&open_iov
, 0, sizeof(open_iov
));
2106 rqst
[0].rq_iov
= open_iov
;
2107 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2110 oparms
.desired_access
= FILE_READ_ATTRIBUTES
| FILE_READ_DATA
;
2111 oparms
.disposition
= FILE_OPEN
;
2112 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
2114 oparms
.reconnect
= false;
2116 rc
= SMB2_open_init(tcon
, server
,
2117 &rqst
[0], &oplock
, &oparms
, utf16_path
);
2120 smb2_set_next_command(tcon
, &rqst
[0]);
2122 /* Query directory */
2123 srch_inf
->entries_in_buffer
= 0;
2124 srch_inf
->index_of_last_entry
= 2;
2126 memset(&qd_iov
, 0, sizeof(qd_iov
));
2127 rqst
[1].rq_iov
= qd_iov
;
2128 rqst
[1].rq_nvec
= SMB2_QUERY_DIRECTORY_IOV_SIZE
;
2130 rc
= SMB2_query_directory_init(xid
, tcon
, server
,
2132 COMPOUND_FID
, COMPOUND_FID
,
2133 0, srch_inf
->info_level
);
2137 smb2_set_related(&rqst
[1]);
2140 rc
= compound_send_recv(xid
, tcon
->ses
, server
,
2142 resp_buftype
, rsp_iov
);
2144 if (rc
== -EAGAIN
&& retry_count
++ < 10)
2147 /* If the open failed there is nothing to do */
2148 op_rsp
= (struct smb2_create_rsp
*)rsp_iov
[0].iov_base
;
2149 if (op_rsp
== NULL
|| op_rsp
->hdr
.Status
!= STATUS_SUCCESS
) {
2150 cifs_dbg(FYI
, "query_dir_first: open failed rc=%d\n", rc
);
2153 fid
->persistent_fid
= op_rsp
->PersistentFileId
;
2154 fid
->volatile_fid
= op_rsp
->VolatileFileId
;
2156 /* Anything else than ENODATA means a genuine error */
2157 if (rc
&& rc
!= -ENODATA
) {
2158 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
2159 cifs_dbg(FYI
, "query_dir_first: query directory failed rc=%d\n", rc
);
2160 trace_smb3_query_dir_err(xid
, fid
->persistent_fid
,
2161 tcon
->tid
, tcon
->ses
->Suid
, 0, 0, rc
);
2165 atomic_inc(&tcon
->num_remote_opens
);
2167 qd_rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
[1].iov_base
;
2168 if (qd_rsp
->hdr
.Status
== STATUS_NO_MORE_FILES
) {
2169 trace_smb3_query_dir_done(xid
, fid
->persistent_fid
,
2170 tcon
->tid
, tcon
->ses
->Suid
, 0, 0);
2171 srch_inf
->endOfSearch
= true;
2176 rc
= smb2_parse_query_directory(tcon
, &rsp_iov
[1], resp_buftype
[1],
2179 trace_smb3_query_dir_err(xid
, fid
->persistent_fid
, tcon
->tid
,
2180 tcon
->ses
->Suid
, 0, 0, rc
);
2183 resp_buftype
[1] = CIFS_NO_BUFFER
;
2185 trace_smb3_query_dir_done(xid
, fid
->persistent_fid
, tcon
->tid
,
2186 tcon
->ses
->Suid
, 0, srch_inf
->entries_in_buffer
);
2190 SMB2_open_free(&rqst
[0]);
2191 SMB2_query_directory_free(&rqst
[1]);
2192 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
2193 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
2198 smb2_query_dir_next(const unsigned int xid
, struct cifs_tcon
*tcon
,
2199 struct cifs_fid
*fid
, __u16 search_flags
,
2200 struct cifs_search_info
*srch_inf
)
2202 return SMB2_query_directory(xid
, tcon
, fid
->persistent_fid
,
2203 fid
->volatile_fid
, 0, srch_inf
);
2207 smb2_close_dir(const unsigned int xid
, struct cifs_tcon
*tcon
,
2208 struct cifs_fid
*fid
)
2210 return SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
2214 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2215 * the number of credits and return true. Otherwise - return false.
2218 smb2_is_status_pending(char *buf
, struct TCP_Server_Info
*server
)
2220 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2221 int scredits
, in_flight
;
2223 if (shdr
->Status
!= STATUS_PENDING
)
2226 if (shdr
->CreditRequest
) {
2227 spin_lock(&server
->req_lock
);
2228 server
->credits
+= le16_to_cpu(shdr
->CreditRequest
);
2229 scredits
= server
->credits
;
2230 in_flight
= server
->in_flight
;
2231 spin_unlock(&server
->req_lock
);
2232 wake_up(&server
->request_q
);
2234 trace_smb3_pend_credits(server
->CurrentMid
,
2235 server
->conn_id
, server
->hostname
, scredits
,
2236 le16_to_cpu(shdr
->CreditRequest
), in_flight
);
2237 cifs_dbg(FYI
, "%s: status pending add %u credits total=%d\n",
2238 __func__
, le16_to_cpu(shdr
->CreditRequest
), scredits
);
2245 smb2_is_session_expired(char *buf
)
2247 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2249 if (shdr
->Status
!= STATUS_NETWORK_SESSION_EXPIRED
&&
2250 shdr
->Status
!= STATUS_USER_SESSION_DELETED
)
2253 trace_smb3_ses_expired(le32_to_cpu(shdr
->Id
.SyncId
.TreeId
),
2254 le64_to_cpu(shdr
->SessionId
),
2255 le16_to_cpu(shdr
->Command
),
2256 le64_to_cpu(shdr
->MessageId
));
2257 cifs_dbg(FYI
, "Session expired or deleted\n");
2263 smb2_is_status_io_timeout(char *buf
)
2265 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2267 if (shdr
->Status
== STATUS_IO_TIMEOUT
)
2274 smb2_is_network_name_deleted(char *buf
, struct TCP_Server_Info
*server
)
2276 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
2277 struct cifs_ses
*ses
;
2278 struct cifs_tcon
*tcon
;
2280 if (shdr
->Status
!= STATUS_NETWORK_NAME_DELETED
)
2283 spin_lock(&cifs_tcp_ses_lock
);
2284 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2285 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2286 if (tcon
->tid
== le32_to_cpu(shdr
->Id
.SyncId
.TreeId
)) {
2287 spin_lock(&tcon
->tc_lock
);
2288 tcon
->need_reconnect
= true;
2289 spin_unlock(&tcon
->tc_lock
);
2290 spin_unlock(&cifs_tcp_ses_lock
);
2291 pr_warn_once("Server share %s deleted.\n",
2297 spin_unlock(&cifs_tcp_ses_lock
);
2301 smb2_oplock_response(struct cifs_tcon
*tcon
, struct cifs_fid
*fid
,
2302 struct cifsInodeInfo
*cinode
)
2304 if (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
)
2305 return SMB2_lease_break(0, tcon
, cinode
->lease_key
,
2306 smb2_get_lease_state(cinode
));
2308 return SMB2_oplock_break(0, tcon
, fid
->persistent_fid
,
2310 CIFS_CACHE_READ(cinode
) ? 1 : 0);
2314 smb2_set_related(struct smb_rqst
*rqst
)
2316 struct smb2_hdr
*shdr
;
2318 shdr
= (struct smb2_hdr
*)(rqst
->rq_iov
[0].iov_base
);
2320 cifs_dbg(FYI
, "shdr NULL in smb2_set_related\n");
2323 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2326 char smb2_padding
[7] = {0, 0, 0, 0, 0, 0, 0};
2329 smb2_set_next_command(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
)
2331 struct smb2_hdr
*shdr
;
2332 struct cifs_ses
*ses
= tcon
->ses
;
2333 struct TCP_Server_Info
*server
= ses
->server
;
2334 unsigned long len
= smb_rqst_len(server
, rqst
);
2337 shdr
= (struct smb2_hdr
*)(rqst
->rq_iov
[0].iov_base
);
2339 cifs_dbg(FYI
, "shdr NULL in smb2_set_next_command\n");
2343 /* SMB headers in a compound are 8 byte aligned. */
2345 /* No padding needed */
2349 num_padding
= 8 - (len
& 7);
2350 if (!smb3_encryption_required(tcon
)) {
2352 * If we do not have encryption then we can just add an extra
2353 * iov for the padding.
2355 rqst
->rq_iov
[rqst
->rq_nvec
].iov_base
= smb2_padding
;
2356 rqst
->rq_iov
[rqst
->rq_nvec
].iov_len
= num_padding
;
2361 * We can not add a small padding iov for the encryption case
2362 * because the encryption framework can not handle the padding
2364 * We have to flatten this into a single buffer and add
2365 * the padding to it.
2367 for (i
= 1; i
< rqst
->rq_nvec
; i
++) {
2368 memcpy(rqst
->rq_iov
[0].iov_base
+
2369 rqst
->rq_iov
[0].iov_len
,
2370 rqst
->rq_iov
[i
].iov_base
,
2371 rqst
->rq_iov
[i
].iov_len
);
2372 rqst
->rq_iov
[0].iov_len
+= rqst
->rq_iov
[i
].iov_len
;
2374 memset(rqst
->rq_iov
[0].iov_base
+ rqst
->rq_iov
[0].iov_len
,
2376 rqst
->rq_iov
[0].iov_len
+= num_padding
;
2382 shdr
->NextCommand
= cpu_to_le32(len
);
2386 * Passes the query info response back to the caller on success.
2387 * Caller need to free this with free_rsp_buf().
2390 smb2_query_info_compound(const unsigned int xid
, struct cifs_tcon
*tcon
,
2391 const char *path
, u32 desired_access
,
2392 u32
class, u32 type
, u32 output_len
,
2393 struct kvec
*rsp
, int *buftype
,
2394 struct cifs_sb_info
*cifs_sb
)
2396 struct cifs_ses
*ses
= tcon
->ses
;
2397 struct TCP_Server_Info
*server
= cifs_pick_channel(ses
);
2398 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
2399 struct smb_rqst rqst
[3];
2400 int resp_buftype
[3];
2401 struct kvec rsp_iov
[3];
2402 struct kvec open_iov
[SMB2_CREATE_IOV_SIZE
];
2403 struct kvec qi_iov
[1];
2404 struct kvec close_iov
[1];
2405 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2406 struct cifs_open_parms oparms
;
2407 struct cifs_fid fid
;
2410 struct cached_fid
*cfid
= NULL
;
2414 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
2418 if (smb3_encryption_required(tcon
))
2419 flags
|= CIFS_TRANSFORM_REQ
;
2421 memset(rqst
, 0, sizeof(rqst
));
2422 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
2423 memset(rsp_iov
, 0, sizeof(rsp_iov
));
2426 * We can only call this for things we know are directories.
2428 if (!strcmp(path
, ""))
2429 open_cached_dir(xid
, tcon
, path
, cifs_sb
, false,
2430 &cfid
); /* cfid null if open dir failed */
2432 memset(&open_iov
, 0, sizeof(open_iov
));
2433 rqst
[0].rq_iov
= open_iov
;
2434 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2437 oparms
.desired_access
= desired_access
;
2438 oparms
.disposition
= FILE_OPEN
;
2439 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
2441 oparms
.reconnect
= false;
2443 rc
= SMB2_open_init(tcon
, server
,
2444 &rqst
[0], &oplock
, &oparms
, utf16_path
);
2447 smb2_set_next_command(tcon
, &rqst
[0]);
2449 memset(&qi_iov
, 0, sizeof(qi_iov
));
2450 rqst
[1].rq_iov
= qi_iov
;
2451 rqst
[1].rq_nvec
= 1;
2454 rc
= SMB2_query_info_init(tcon
, server
,
2456 cfid
->fid
.persistent_fid
,
2457 cfid
->fid
.volatile_fid
,
2462 rc
= SMB2_query_info_init(tcon
, server
,
2473 smb2_set_next_command(tcon
, &rqst
[1]);
2474 smb2_set_related(&rqst
[1]);
2477 memset(&close_iov
, 0, sizeof(close_iov
));
2478 rqst
[2].rq_iov
= close_iov
;
2479 rqst
[2].rq_nvec
= 1;
2481 rc
= SMB2_close_init(tcon
, server
,
2482 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
2485 smb2_set_related(&rqst
[2]);
2488 rc
= compound_send_recv(xid
, ses
, server
,
2490 &resp_buftype
[1], &rsp_iov
[1]);
2492 rc
= compound_send_recv(xid
, ses
, server
,
2494 resp_buftype
, rsp_iov
);
2497 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
2498 if (rc
== -EREMCHG
) {
2499 tcon
->need_reconnect
= true;
2500 pr_warn_once("server share %s deleted\n",
2506 *buftype
= resp_buftype
[1];
2510 SMB2_open_free(&rqst
[0]);
2511 SMB2_query_info_free(&rqst
[1]);
2512 SMB2_close_free(&rqst
[2]);
2513 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
2514 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
2516 close_cached_dir(cfid
);
2521 smb2_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
2522 struct cifs_sb_info
*cifs_sb
, struct kstatfs
*buf
)
2524 struct smb2_query_info_rsp
*rsp
;
2525 struct smb2_fs_full_size_info
*info
= NULL
;
2526 struct kvec rsp_iov
= {NULL
, 0};
2527 int buftype
= CIFS_NO_BUFFER
;
2531 rc
= smb2_query_info_compound(xid
, tcon
, "",
2532 FILE_READ_ATTRIBUTES
,
2533 FS_FULL_SIZE_INFORMATION
,
2534 SMB2_O_INFO_FILESYSTEM
,
2535 sizeof(struct smb2_fs_full_size_info
),
2536 &rsp_iov
, &buftype
, cifs_sb
);
2540 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2541 buf
->f_type
= SMB2_SUPER_MAGIC
;
2542 info
= (struct smb2_fs_full_size_info
*)(
2543 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
2544 rc
= smb2_validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2545 le32_to_cpu(rsp
->OutputBufferLength
),
2547 sizeof(struct smb2_fs_full_size_info
));
2549 smb2_copy_fs_info_to_kstatfs(info
, buf
);
2552 free_rsp_buf(buftype
, rsp_iov
.iov_base
);
2557 smb311_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
2558 struct cifs_sb_info
*cifs_sb
, struct kstatfs
*buf
)
2561 __le16 srch_path
= 0; /* Null - open root of share */
2562 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2563 struct cifs_open_parms oparms
;
2564 struct cifs_fid fid
;
2566 if (!tcon
->posix_extensions
)
2567 return smb2_queryfs(xid
, tcon
, cifs_sb
, buf
);
2570 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
2571 oparms
.disposition
= FILE_OPEN
;
2572 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
2574 oparms
.reconnect
= false;
2576 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
,
2581 rc
= SMB311_posix_qfs_info(xid
, tcon
, fid
.persistent_fid
,
2582 fid
.volatile_fid
, buf
);
2583 buf
->f_type
= SMB2_SUPER_MAGIC
;
2584 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
2589 smb2_compare_fids(struct cifsFileInfo
*ob1
, struct cifsFileInfo
*ob2
)
2591 return ob1
->fid
.persistent_fid
== ob2
->fid
.persistent_fid
&&
2592 ob1
->fid
.volatile_fid
== ob2
->fid
.volatile_fid
;
2596 smb2_mand_lock(const unsigned int xid
, struct cifsFileInfo
*cfile
, __u64 offset
,
2597 __u64 length
, __u32 type
, int lock
, int unlock
, bool wait
)
2599 if (unlock
&& !lock
)
2600 type
= SMB2_LOCKFLAG_UNLOCK
;
2601 return SMB2_lock(xid
, tlink_tcon(cfile
->tlink
),
2602 cfile
->fid
.persistent_fid
, cfile
->fid
.volatile_fid
,
2603 current
->tgid
, length
, offset
, type
, wait
);
2607 smb2_get_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
2609 memcpy(fid
->lease_key
, CIFS_I(inode
)->lease_key
, SMB2_LEASE_KEY_SIZE
);
2613 smb2_set_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
2615 memcpy(CIFS_I(inode
)->lease_key
, fid
->lease_key
, SMB2_LEASE_KEY_SIZE
);
2619 smb2_new_lease_key(struct cifs_fid
*fid
)
2621 generate_random_uuid(fid
->lease_key
);
2625 smb2_get_dfs_refer(const unsigned int xid
, struct cifs_ses
*ses
,
2626 const char *search_name
,
2627 struct dfs_info3_param
**target_nodes
,
2628 unsigned int *num_of_nodes
,
2629 const struct nls_table
*nls_codepage
, int remap
)
2632 __le16
*utf16_path
= NULL
;
2633 int utf16_path_len
= 0;
2634 struct cifs_tcon
*tcon
;
2635 struct fsctl_get_dfs_referral_req
*dfs_req
= NULL
;
2636 struct get_dfs_referral_rsp
*dfs_rsp
= NULL
;
2637 u32 dfs_req_size
= 0, dfs_rsp_size
= 0;
2638 int retry_count
= 0;
2640 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, search_name
);
2643 * Try to use the IPC tcon, otherwise just use any
2645 tcon
= ses
->tcon_ipc
;
2647 spin_lock(&cifs_tcp_ses_lock
);
2648 tcon
= list_first_entry_or_null(&ses
->tcon_list
,
2653 spin_unlock(&cifs_tcp_ses_lock
);
2657 cifs_dbg(VFS
, "session %p has no tcon available for a dfs referral request\n",
2663 utf16_path
= cifs_strndup_to_utf16(search_name
, PATH_MAX
,
2665 nls_codepage
, remap
);
2671 dfs_req_size
= sizeof(*dfs_req
) + utf16_path_len
;
2672 dfs_req
= kzalloc(dfs_req_size
, GFP_KERNEL
);
2678 /* Highest DFS referral version understood */
2679 dfs_req
->MaxReferralLevel
= DFS_VERSION
;
2681 /* Path to resolve in an UTF-16 null-terminated string */
2682 memcpy(dfs_req
->RequestFileName
, utf16_path
, utf16_path_len
);
2685 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
2686 FSCTL_DFS_GET_REFERRALS
,
2687 (char *)dfs_req
, dfs_req_size
, CIFSMaxBufSize
,
2688 (char **)&dfs_rsp
, &dfs_rsp_size
);
2689 if (!is_retryable_error(rc
))
2691 usleep_range(512, 2048);
2692 } while (++retry_count
< 5);
2695 if (!is_retryable_error(rc
) && rc
!= -ENOENT
&& rc
!= -EOPNOTSUPP
)
2696 cifs_tcon_dbg(VFS
, "%s: ioctl error: rc=%d\n", __func__
, rc
);
2700 rc
= parse_dfs_referrals(dfs_rsp
, dfs_rsp_size
,
2701 num_of_nodes
, target_nodes
,
2702 nls_codepage
, remap
, search_name
,
2703 true /* is_unicode */);
2705 cifs_tcon_dbg(VFS
, "parse error in %s rc=%d\n", __func__
, rc
);
2710 if (tcon
&& !tcon
->ipc
) {
2711 /* ipc tcons are not refcounted */
2712 spin_lock(&cifs_tcp_ses_lock
);
2714 /* tc_count can never go negative */
2715 WARN_ON(tcon
->tc_count
< 0);
2716 spin_unlock(&cifs_tcp_ses_lock
);
2725 parse_reparse_posix(struct reparse_posix_data
*symlink_buf
,
2726 u32 plen
, char **target_path
,
2727 struct cifs_sb_info
*cifs_sb
)
2731 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2732 len
= le16_to_cpu(symlink_buf
->ReparseDataLength
);
2734 if (le64_to_cpu(symlink_buf
->InodeType
) != NFS_SPECFILE_LNK
) {
2735 cifs_dbg(VFS
, "%lld not a supported symlink type\n",
2736 le64_to_cpu(symlink_buf
->InodeType
));
2740 *target_path
= cifs_strndup_from_utf16(
2741 symlink_buf
->PathBuffer
,
2742 len
, true, cifs_sb
->local_nls
);
2743 if (!(*target_path
))
2746 convert_delimiter(*target_path
, '/');
2747 cifs_dbg(FYI
, "%s: target path: %s\n", __func__
, *target_path
);
2753 parse_reparse_symlink(struct reparse_symlink_data_buffer
*symlink_buf
,
2754 u32 plen
, char **target_path
,
2755 struct cifs_sb_info
*cifs_sb
)
2757 unsigned int sub_len
;
2758 unsigned int sub_offset
;
2760 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2762 sub_offset
= le16_to_cpu(symlink_buf
->SubstituteNameOffset
);
2763 sub_len
= le16_to_cpu(symlink_buf
->SubstituteNameLength
);
2764 if (sub_offset
+ 20 > plen
||
2765 sub_offset
+ sub_len
+ 20 > plen
) {
2766 cifs_dbg(VFS
, "srv returned malformed symlink buffer\n");
2770 *target_path
= cifs_strndup_from_utf16(
2771 symlink_buf
->PathBuffer
+ sub_offset
,
2772 sub_len
, true, cifs_sb
->local_nls
);
2773 if (!(*target_path
))
2776 convert_delimiter(*target_path
, '/');
2777 cifs_dbg(FYI
, "%s: target path: %s\n", __func__
, *target_path
);
2783 parse_reparse_point(struct reparse_data_buffer
*buf
,
2784 u32 plen
, char **target_path
,
2785 struct cifs_sb_info
*cifs_sb
)
2787 if (plen
< sizeof(struct reparse_data_buffer
)) {
2788 cifs_dbg(VFS
, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2793 if (plen
< le16_to_cpu(buf
->ReparseDataLength
) +
2794 sizeof(struct reparse_data_buffer
)) {
2795 cifs_dbg(VFS
, "srv returned invalid reparse buf length: %d\n",
2800 /* See MS-FSCC 2.1.2 */
2801 switch (le32_to_cpu(buf
->ReparseTag
)) {
2802 case IO_REPARSE_TAG_NFS
:
2803 return parse_reparse_posix(
2804 (struct reparse_posix_data
*)buf
,
2805 plen
, target_path
, cifs_sb
);
2806 case IO_REPARSE_TAG_SYMLINK
:
2807 return parse_reparse_symlink(
2808 (struct reparse_symlink_data_buffer
*)buf
,
2809 plen
, target_path
, cifs_sb
);
2811 cifs_dbg(VFS
, "srv returned unknown symlink buffer tag:0x%08x\n",
2812 le32_to_cpu(buf
->ReparseTag
));
2817 #define SMB2_SYMLINK_STRUCT_SIZE \
2818 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2821 smb2_query_symlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
2822 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
2823 char **target_path
, bool is_reparse_point
)
2826 __le16
*utf16_path
= NULL
;
2827 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2828 struct cifs_open_parms oparms
;
2829 struct cifs_fid fid
;
2830 struct kvec err_iov
= {NULL
, 0};
2831 struct smb2_err_rsp
*err_buf
= NULL
;
2832 struct smb2_symlink_err_rsp
*symlink
;
2833 struct TCP_Server_Info
*server
= cifs_pick_channel(tcon
->ses
);
2834 unsigned int sub_len
;
2835 unsigned int sub_offset
;
2836 unsigned int print_len
;
2837 unsigned int print_offset
;
2838 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
2839 struct smb_rqst rqst
[3];
2840 int resp_buftype
[3];
2841 struct kvec rsp_iov
[3];
2842 struct kvec open_iov
[SMB2_CREATE_IOV_SIZE
];
2843 struct kvec io_iov
[SMB2_IOCTL_IOV_SIZE
];
2844 struct kvec close_iov
[1];
2845 struct smb2_create_rsp
*create_rsp
;
2846 struct smb2_ioctl_rsp
*ioctl_rsp
;
2847 struct reparse_data_buffer
*reparse_buf
;
2848 int create_options
= is_reparse_point
? OPEN_REPARSE_POINT
: 0;
2851 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, full_path
);
2853 *target_path
= NULL
;
2855 if (smb3_encryption_required(tcon
))
2856 flags
|= CIFS_TRANSFORM_REQ
;
2858 memset(rqst
, 0, sizeof(rqst
));
2859 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
2860 memset(rsp_iov
, 0, sizeof(rsp_iov
));
2862 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
2867 memset(&open_iov
, 0, sizeof(open_iov
));
2868 rqst
[0].rq_iov
= open_iov
;
2869 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
2871 memset(&oparms
, 0, sizeof(oparms
));
2873 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
2874 oparms
.disposition
= FILE_OPEN
;
2875 oparms
.create_options
= cifs_create_options(cifs_sb
, create_options
);
2877 oparms
.reconnect
= false;
2879 rc
= SMB2_open_init(tcon
, server
,
2880 &rqst
[0], &oplock
, &oparms
, utf16_path
);
2883 smb2_set_next_command(tcon
, &rqst
[0]);
2887 memset(&io_iov
, 0, sizeof(io_iov
));
2888 rqst
[1].rq_iov
= io_iov
;
2889 rqst
[1].rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
2891 rc
= SMB2_ioctl_init(tcon
, server
,
2892 &rqst
[1], fid
.persistent_fid
,
2893 fid
.volatile_fid
, FSCTL_GET_REPARSE_POINT
, NULL
, 0,
2895 MAX_SMB2_CREATE_RESPONSE_SIZE
-
2896 MAX_SMB2_CLOSE_RESPONSE_SIZE
);
2900 smb2_set_next_command(tcon
, &rqst
[1]);
2901 smb2_set_related(&rqst
[1]);
2905 memset(&close_iov
, 0, sizeof(close_iov
));
2906 rqst
[2].rq_iov
= close_iov
;
2907 rqst
[2].rq_nvec
= 1;
2909 rc
= SMB2_close_init(tcon
, server
,
2910 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
2914 smb2_set_related(&rqst
[2]);
2916 rc
= compound_send_recv(xid
, tcon
->ses
, server
,
2918 resp_buftype
, rsp_iov
);
2920 create_rsp
= rsp_iov
[0].iov_base
;
2921 if (create_rsp
&& create_rsp
->hdr
.Status
)
2922 err_iov
= rsp_iov
[0];
2923 ioctl_rsp
= rsp_iov
[1].iov_base
;
2926 * Open was successful and we got an ioctl response.
2928 if ((rc
== 0) && (is_reparse_point
)) {
2929 /* See MS-FSCC 2.3.23 */
2931 reparse_buf
= (struct reparse_data_buffer
*)
2932 ((char *)ioctl_rsp
+
2933 le32_to_cpu(ioctl_rsp
->OutputOffset
));
2934 plen
= le32_to_cpu(ioctl_rsp
->OutputCount
);
2936 if (plen
+ le32_to_cpu(ioctl_rsp
->OutputOffset
) >
2937 rsp_iov
[1].iov_len
) {
2938 cifs_tcon_dbg(VFS
, "srv returned invalid ioctl len: %d\n",
2944 rc
= parse_reparse_point(reparse_buf
, plen
, target_path
,
2949 if (!rc
|| !err_iov
.iov_base
) {
2954 err_buf
= err_iov
.iov_base
;
2955 if (le32_to_cpu(err_buf
->ByteCount
) < sizeof(struct smb2_symlink_err_rsp
) ||
2956 err_iov
.iov_len
< SMB2_SYMLINK_STRUCT_SIZE
) {
2961 symlink
= (struct smb2_symlink_err_rsp
*)err_buf
->ErrorData
;
2962 if (le32_to_cpu(symlink
->SymLinkErrorTag
) != SYMLINK_ERROR_TAG
||
2963 le32_to_cpu(symlink
->ReparseTag
) != IO_REPARSE_TAG_SYMLINK
) {
2968 /* open must fail on symlink - reset rc */
2970 sub_len
= le16_to_cpu(symlink
->SubstituteNameLength
);
2971 sub_offset
= le16_to_cpu(symlink
->SubstituteNameOffset
);
2972 print_len
= le16_to_cpu(symlink
->PrintNameLength
);
2973 print_offset
= le16_to_cpu(symlink
->PrintNameOffset
);
2975 if (err_iov
.iov_len
< SMB2_SYMLINK_STRUCT_SIZE
+ sub_offset
+ sub_len
) {
2980 if (err_iov
.iov_len
<
2981 SMB2_SYMLINK_STRUCT_SIZE
+ print_offset
+ print_len
) {
2986 *target_path
= cifs_strndup_from_utf16(
2987 (char *)symlink
->PathBuffer
+ sub_offset
,
2988 sub_len
, true, cifs_sb
->local_nls
);
2989 if (!(*target_path
)) {
2993 convert_delimiter(*target_path
, '/');
2994 cifs_dbg(FYI
, "%s: target path: %s\n", __func__
, *target_path
);
2997 cifs_dbg(FYI
, "query symlink rc %d\n", rc
);
2999 SMB2_open_free(&rqst
[0]);
3000 SMB2_ioctl_free(&rqst
[1]);
3001 SMB2_close_free(&rqst
[2]);
3002 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
3003 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
3004 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
3009 smb2_query_reparse_tag(const unsigned int xid
, struct cifs_tcon
*tcon
,
3010 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
3014 __le16
*utf16_path
= NULL
;
3015 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
3016 struct cifs_open_parms oparms
;
3017 struct cifs_fid fid
;
3018 struct TCP_Server_Info
*server
= cifs_pick_channel(tcon
->ses
);
3019 int flags
= CIFS_CP_CREATE_CLOSE_OP
;
3020 struct smb_rqst rqst
[3];
3021 int resp_buftype
[3];
3022 struct kvec rsp_iov
[3];
3023 struct kvec open_iov
[SMB2_CREATE_IOV_SIZE
];
3024 struct kvec io_iov
[SMB2_IOCTL_IOV_SIZE
];
3025 struct kvec close_iov
[1];
3026 struct smb2_ioctl_rsp
*ioctl_rsp
;
3027 struct reparse_data_buffer
*reparse_buf
;
3030 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, full_path
);
3032 if (smb3_encryption_required(tcon
))
3033 flags
|= CIFS_TRANSFORM_REQ
;
3035 memset(rqst
, 0, sizeof(rqst
));
3036 resp_buftype
[0] = resp_buftype
[1] = resp_buftype
[2] = CIFS_NO_BUFFER
;
3037 memset(rsp_iov
, 0, sizeof(rsp_iov
));
3039 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
3044 * setup smb2open - TODO add optimization to call cifs_get_readable_path
3045 * to see if there is a handle already open that we can use
3047 memset(&open_iov
, 0, sizeof(open_iov
));
3048 rqst
[0].rq_iov
= open_iov
;
3049 rqst
[0].rq_nvec
= SMB2_CREATE_IOV_SIZE
;
3051 memset(&oparms
, 0, sizeof(oparms
));
3053 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
3054 oparms
.disposition
= FILE_OPEN
;
3055 oparms
.create_options
= cifs_create_options(cifs_sb
, OPEN_REPARSE_POINT
);
3057 oparms
.reconnect
= false;
3059 rc
= SMB2_open_init(tcon
, server
,
3060 &rqst
[0], &oplock
, &oparms
, utf16_path
);
3063 smb2_set_next_command(tcon
, &rqst
[0]);
3067 memset(&io_iov
, 0, sizeof(io_iov
));
3068 rqst
[1].rq_iov
= io_iov
;
3069 rqst
[1].rq_nvec
= SMB2_IOCTL_IOV_SIZE
;
3071 rc
= SMB2_ioctl_init(tcon
, server
,
3072 &rqst
[1], COMPOUND_FID
,
3073 COMPOUND_FID
, FSCTL_GET_REPARSE_POINT
, NULL
, 0,
3075 MAX_SMB2_CREATE_RESPONSE_SIZE
-
3076 MAX_SMB2_CLOSE_RESPONSE_SIZE
);
3080 smb2_set_next_command(tcon
, &rqst
[1]);
3081 smb2_set_related(&rqst
[1]);
3085 memset(&close_iov
, 0, sizeof(close_iov
));
3086 rqst
[2].rq_iov
= close_iov
;
3087 rqst
[2].rq_nvec
= 1;
3089 rc
= SMB2_close_init(tcon
, server
,
3090 &rqst
[2], COMPOUND_FID
, COMPOUND_FID
, false);
3094 smb2_set_related(&rqst
[2]);
3096 rc
= compound_send_recv(xid
, tcon
->ses
, server
,
3098 resp_buftype
, rsp_iov
);
3100 ioctl_rsp
= rsp_iov
[1].iov_base
;
3103 * Open was successful and we got an ioctl response.
3106 /* See MS-FSCC 2.3.23 */
3108 reparse_buf
= (struct reparse_data_buffer
*)
3109 ((char *)ioctl_rsp
+
3110 le32_to_cpu(ioctl_rsp
->OutputOffset
));
3111 plen
= le32_to_cpu(ioctl_rsp
->OutputCount
);
3113 if (plen
+ le32_to_cpu(ioctl_rsp
->OutputOffset
) >
3114 rsp_iov
[1].iov_len
) {
3115 cifs_tcon_dbg(FYI
, "srv returned invalid ioctl len: %d\n",
3120 *tag
= le32_to_cpu(reparse_buf
->ReparseTag
);
3125 SMB2_open_free(&rqst
[0]);
3126 SMB2_ioctl_free(&rqst
[1]);
3127 SMB2_close_free(&rqst
[2]);
3128 free_rsp_buf(resp_buftype
[0], rsp_iov
[0].iov_base
);
3129 free_rsp_buf(resp_buftype
[1], rsp_iov
[1].iov_base
);
3130 free_rsp_buf(resp_buftype
[2], rsp_iov
[2].iov_base
);
3134 static struct cifs_ntsd
*
3135 get_smb2_acl_by_fid(struct cifs_sb_info
*cifs_sb
,
3136 const struct cifs_fid
*cifsfid
, u32
*pacllen
, u32 info
)
3138 struct cifs_ntsd
*pntsd
= NULL
;
3140 int rc
= -EOPNOTSUPP
;
3141 struct tcon_link
*tlink
= cifs_sb_tlink(cifs_sb
);
3144 return ERR_CAST(tlink
);
3147 cifs_dbg(FYI
, "trying to get acl\n");
3149 rc
= SMB2_query_acl(xid
, tlink_tcon(tlink
), cifsfid
->persistent_fid
,
3150 cifsfid
->volatile_fid
, (void **)&pntsd
, pacllen
,
3154 cifs_put_tlink(tlink
);
3156 cifs_dbg(FYI
, "%s: rc = %d ACL len %d\n", __func__
, rc
, *pacllen
);
3163 static struct cifs_ntsd
*
3164 get_smb2_acl_by_path(struct cifs_sb_info
*cifs_sb
,
3165 const char *path
, u32
*pacllen
, u32 info
)
3167 struct cifs_ntsd
*pntsd
= NULL
;
3168 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
3171 struct cifs_tcon
*tcon
;
3172 struct tcon_link
*tlink
= cifs_sb_tlink(cifs_sb
);
3173 struct cifs_fid fid
;
3174 struct cifs_open_parms oparms
;
3177 cifs_dbg(FYI
, "get smb3 acl for path %s\n", path
);
3179 return ERR_CAST(tlink
);
3181 tcon
= tlink_tcon(tlink
);
3184 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
3192 oparms
.desired_access
= READ_CONTROL
;
3193 oparms
.disposition
= FILE_OPEN
;
3195 * When querying an ACL, even if the file is a symlink we want to open
3196 * the source not the target, and so the protocol requires that the
3197 * client specify this flag when opening a reparse point
3199 oparms
.create_options
= cifs_create_options(cifs_sb
, 0) | OPEN_REPARSE_POINT
;
3201 oparms
.reconnect
= false;
3203 if (info
& SACL_SECINFO
)
3204 oparms
.desired_access
|= SYSTEM_SECURITY
;
3206 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
, NULL
,
3210 rc
= SMB2_query_acl(xid
, tlink_tcon(tlink
), fid
.persistent_fid
,
3211 fid
.volatile_fid
, (void **)&pntsd
, pacllen
,
3213 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
3216 cifs_put_tlink(tlink
);
3219 cifs_dbg(FYI
, "%s: rc = %d ACL len %d\n", __func__
, rc
, *pacllen
);
3226 set_smb2_acl(struct cifs_ntsd
*pnntsd
, __u32 acllen
,
3227 struct inode
*inode
, const char *path
, int aclflag
)
3229 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
3231 int rc
, access_flags
= 0;
3232 struct cifs_tcon
*tcon
;
3233 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
3234 struct tcon_link
*tlink
= cifs_sb_tlink(cifs_sb
);
3235 struct cifs_fid fid
;
3236 struct cifs_open_parms oparms
;
3239 cifs_dbg(FYI
, "set smb3 acl for path %s\n", path
);
3241 return PTR_ERR(tlink
);
3243 tcon
= tlink_tcon(tlink
);
3246 if (aclflag
& CIFS_ACL_OWNER
|| aclflag
& CIFS_ACL_GROUP
)
3247 access_flags
|= WRITE_OWNER
;
3248 if (aclflag
& CIFS_ACL_SACL
)
3249 access_flags
|= SYSTEM_SECURITY
;
3250 if (aclflag
& CIFS_ACL_DACL
)
3251 access_flags
|= WRITE_DAC
;
3253 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
3261 oparms
.desired_access
= access_flags
;
3262 oparms
.create_options
= cifs_create_options(cifs_sb
, 0);
3263 oparms
.disposition
= FILE_OPEN
;
3266 oparms
.reconnect
= false;
3268 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
,
3272 rc
= SMB2_set_acl(xid
, tlink_tcon(tlink
), fid
.persistent_fid
,
3273 fid
.volatile_fid
, pnntsd
, acllen
, aclflag
);
3274 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
3277 cifs_put_tlink(tlink
);
3282 /* Retrieve an ACL from the server */
3283 static struct cifs_ntsd
*
3284 get_smb2_acl(struct cifs_sb_info
*cifs_sb
,
3285 struct inode
*inode
, const char *path
,
3286 u32
*pacllen
, u32 info
)
3288 struct cifs_ntsd
*pntsd
= NULL
;
3289 struct cifsFileInfo
*open_file
= NULL
;
3291 if (inode
&& !(info
& SACL_SECINFO
))
3292 open_file
= find_readable_file(CIFS_I(inode
), true);
3293 if (!open_file
|| (info
& SACL_SECINFO
))
3294 return get_smb2_acl_by_path(cifs_sb
, path
, pacllen
, info
);
3296 pntsd
= get_smb2_acl_by_fid(cifs_sb
, &open_file
->fid
, pacllen
, info
);
3297 cifsFileInfo_put(open_file
);
3301 static long smb3_zero_data(struct file
*file
, struct cifs_tcon
*tcon
,
3302 loff_t offset
, loff_t len
, unsigned int xid
)
3304 struct cifsFileInfo
*cfile
= file
->private_data
;
3305 struct file_zero_data_information fsctl_buf
;
3307 cifs_dbg(FYI
, "Offset %lld len %lld\n", offset
, len
);
3309 fsctl_buf
.FileOffset
= cpu_to_le64(offset
);
3310 fsctl_buf
.BeyondFinalZero
= cpu_to_le64(offset
+ len
);
3312 return SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3313 cfile
->fid
.volatile_fid
, FSCTL_SET_ZERO_DATA
,
3315 sizeof(struct file_zero_data_information
),
3319 static long smb3_zero_range(struct file
*file
, struct cifs_tcon
*tcon
,
3320 loff_t offset
, loff_t len
, bool keep_size
)
3322 struct cifs_ses
*ses
= tcon
->ses
;
3323 struct inode
*inode
= file_inode(file
);
3324 struct cifsInodeInfo
*cifsi
= CIFS_I(inode
);
3325 struct cifsFileInfo
*cfile
= file
->private_data
;
3332 trace_smb3_zero_enter(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3333 ses
->Suid
, offset
, len
);
3336 filemap_invalidate_lock(inode
->i_mapping
);
3339 * We zero the range through ioctl, so we need remove the page caches
3340 * first, otherwise the data may be inconsistent with the server.
3342 truncate_pagecache_range(inode
, offset
, offset
+ len
- 1);
3344 /* if file not oplocked can't be sure whether asking to extend size */
3346 if (keep_size
== false && !CIFS_CACHE_READ(cifsi
))
3347 goto zero_range_exit
;
3349 rc
= smb3_zero_data(file
, tcon
, offset
, len
, xid
);
3351 goto zero_range_exit
;
3354 * do we also need to change the size of the file?
3356 if (keep_size
== false && i_size_read(inode
) < offset
+ len
) {
3357 eof
= cpu_to_le64(offset
+ len
);
3358 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3359 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3363 filemap_invalidate_unlock(inode
->i_mapping
);
3364 inode_unlock(inode
);
3367 trace_smb3_zero_err(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3368 ses
->Suid
, offset
, len
, rc
);
3370 trace_smb3_zero_done(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3371 ses
->Suid
, offset
, len
);
3375 static long smb3_punch_hole(struct file
*file
, struct cifs_tcon
*tcon
,
3376 loff_t offset
, loff_t len
)
3378 struct inode
*inode
= file_inode(file
);
3379 struct cifsFileInfo
*cfile
= file
->private_data
;
3380 struct file_zero_data_information fsctl_buf
;
3383 __u8 set_sparse
= 1;
3388 /* Need to make file sparse, if not already, before freeing range. */
3389 /* Consider adding equivalent for compressed since it could also work */
3390 if (!smb2_set_sparse(xid
, tcon
, cfile
, inode
, set_sparse
)) {
3395 filemap_invalidate_lock(inode
->i_mapping
);
3397 * We implement the punch hole through ioctl, so we need remove the page
3398 * caches first, otherwise the data may be inconsistent with the server.
3400 truncate_pagecache_range(inode
, offset
, offset
+ len
- 1);
3402 cifs_dbg(FYI
, "Offset %lld len %lld\n", offset
, len
);
3404 fsctl_buf
.FileOffset
= cpu_to_le64(offset
);
3405 fsctl_buf
.BeyondFinalZero
= cpu_to_le64(offset
+ len
);
3407 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3408 cfile
->fid
.volatile_fid
, FSCTL_SET_ZERO_DATA
,
3410 sizeof(struct file_zero_data_information
),
3411 CIFSMaxBufSize
, NULL
, NULL
);
3412 filemap_invalidate_unlock(inode
->i_mapping
);
3414 inode_unlock(inode
);
3419 static int smb3_simple_fallocate_write_range(unsigned int xid
,
3420 struct cifs_tcon
*tcon
,
3421 struct cifsFileInfo
*cfile
,
3422 loff_t off
, loff_t len
,
3425 struct cifs_io_parms io_parms
= {0};
3430 io_parms
.netfid
= cfile
->fid
.netfid
;
3431 io_parms
.pid
= current
->tgid
;
3432 io_parms
.tcon
= tcon
;
3433 io_parms
.persistent_fid
= cfile
->fid
.persistent_fid
;
3434 io_parms
.volatile_fid
= cfile
->fid
.volatile_fid
;
3437 io_parms
.offset
= off
;
3438 io_parms
.length
= len
;
3439 if (io_parms
.length
> SMB2_MAX_BUFFER_SIZE
)
3440 io_parms
.length
= SMB2_MAX_BUFFER_SIZE
;
3441 /* iov[0] is reserved for smb header */
3442 iov
[1].iov_base
= buf
;
3443 iov
[1].iov_len
= io_parms
.length
;
3444 rc
= SMB2_write(xid
, &io_parms
, &nbytes
, iov
, 1);
3456 static int smb3_simple_fallocate_range(unsigned int xid
,
3457 struct cifs_tcon
*tcon
,
3458 struct cifsFileInfo
*cfile
,
3459 loff_t off
, loff_t len
)
3461 struct file_allocated_range_buffer in_data
, *out_data
= NULL
, *tmp_data
;
3467 in_data
.file_offset
= cpu_to_le64(off
);
3468 in_data
.length
= cpu_to_le64(len
);
3469 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3470 cfile
->fid
.volatile_fid
,
3471 FSCTL_QUERY_ALLOCATED_RANGES
,
3472 (char *)&in_data
, sizeof(in_data
),
3473 1024 * sizeof(struct file_allocated_range_buffer
),
3474 (char **)&out_data
, &out_data_len
);
3478 buf
= kzalloc(1024 * 1024, GFP_KERNEL
);
3484 tmp_data
= out_data
;
3487 * The rest of the region is unmapped so write it all.
3489 if (out_data_len
== 0) {
3490 rc
= smb3_simple_fallocate_write_range(xid
, tcon
,
3491 cfile
, off
, len
, buf
);
3495 if (out_data_len
< sizeof(struct file_allocated_range_buffer
)) {
3500 if (off
< le64_to_cpu(tmp_data
->file_offset
)) {
3502 * We are at a hole. Write until the end of the region
3503 * or until the next allocated data,
3504 * whichever comes next.
3506 l
= le64_to_cpu(tmp_data
->file_offset
) - off
;
3509 rc
= smb3_simple_fallocate_write_range(xid
, tcon
,
3510 cfile
, off
, l
, buf
);
3519 * We are at a section of allocated data, just skip forward
3520 * until the end of the data or the end of the region
3521 * we are supposed to fallocate, whichever comes first.
3523 l
= le64_to_cpu(tmp_data
->length
);
3529 tmp_data
= &tmp_data
[1];
3530 out_data_len
-= sizeof(struct file_allocated_range_buffer
);
3540 static long smb3_simple_falloc(struct file
*file
, struct cifs_tcon
*tcon
,
3541 loff_t off
, loff_t len
, bool keep_size
)
3543 struct inode
*inode
;
3544 struct cifsInodeInfo
*cifsi
;
3545 struct cifsFileInfo
*cfile
= file
->private_data
;
3546 long rc
= -EOPNOTSUPP
;
3552 inode
= d_inode(cfile
->dentry
);
3553 cifsi
= CIFS_I(inode
);
3555 trace_smb3_falloc_enter(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3556 tcon
->ses
->Suid
, off
, len
);
3557 /* if file not oplocked can't be sure whether asking to extend size */
3558 if (!CIFS_CACHE_READ(cifsi
))
3559 if (keep_size
== false) {
3560 trace_smb3_falloc_err(xid
, cfile
->fid
.persistent_fid
,
3561 tcon
->tid
, tcon
->ses
->Suid
, off
, len
, rc
);
3567 * Extending the file
3569 if ((keep_size
== false) && i_size_read(inode
) < off
+ len
) {
3570 rc
= inode_newsize_ok(inode
, off
+ len
);
3574 if (cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
)
3575 smb2_set_sparse(xid
, tcon
, cfile
, inode
, false);
3577 eof
= cpu_to_le64(off
+ len
);
3578 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3579 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3581 cifsi
->server_eof
= off
+ len
;
3582 cifs_setsize(inode
, off
+ len
);
3583 cifs_truncate_page(inode
->i_mapping
, inode
->i_size
);
3584 truncate_setsize(inode
, off
+ len
);
3590 * Files are non-sparse by default so falloc may be a no-op
3591 * Must check if file sparse. If not sparse, and since we are not
3592 * extending then no need to do anything since file already allocated
3594 if ((cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) == 0) {
3599 if (keep_size
== true) {
3601 * We can not preallocate pages beyond the end of the file
3604 if (off
>= i_size_read(inode
)) {
3609 * For fallocates that are partially beyond the end of file,
3610 * clamp len so we only fallocate up to the end of file.
3612 if (off
+ len
> i_size_read(inode
)) {
3613 len
= i_size_read(inode
) - off
;
3617 if ((keep_size
== true) || (i_size_read(inode
) >= off
+ len
)) {
3619 * At this point, we are trying to fallocate an internal
3620 * regions of a sparse file. Since smb2 does not have a
3621 * fallocate command we have two otions on how to emulate this.
3622 * We can either turn the entire file to become non-sparse
3623 * which we only do if the fallocate is for virtually
3624 * the whole file, or we can overwrite the region with zeroes
3625 * using SMB2_write, which could be prohibitevly expensive
3629 * We are only trying to fallocate a small region so
3630 * just write it with zero.
3632 if (len
<= 1024 * 1024) {
3633 rc
= smb3_simple_fallocate_range(xid
, tcon
, cfile
,
3639 * Check if falloc starts within first few pages of file
3640 * and ends within a few pages of the end of file to
3641 * ensure that most of file is being forced to be
3642 * fallocated now. If so then setting whole file sparse
3643 * ie potentially making a few extra pages at the beginning
3644 * or end of the file non-sparse via set_sparse is harmless.
3646 if ((off
> 8192) || (off
+ len
+ 8192 < i_size_read(inode
))) {
3652 smb2_set_sparse(xid
, tcon
, cfile
, inode
, false);
3657 trace_smb3_falloc_err(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3658 tcon
->ses
->Suid
, off
, len
, rc
);
3660 trace_smb3_falloc_done(xid
, cfile
->fid
.persistent_fid
, tcon
->tid
,
3661 tcon
->ses
->Suid
, off
, len
);
3667 static long smb3_collapse_range(struct file
*file
, struct cifs_tcon
*tcon
,
3668 loff_t off
, loff_t len
)
3672 struct inode
*inode
= file_inode(file
);
3673 struct cifsFileInfo
*cfile
= file
->private_data
;
3674 struct cifsInodeInfo
*cifsi
= CIFS_I(inode
);
3682 old_eof
= i_size_read(inode
);
3683 if ((off
>= old_eof
) ||
3684 off
+ len
>= old_eof
) {
3689 filemap_invalidate_lock(inode
->i_mapping
);
3690 rc
= filemap_write_and_wait_range(inode
->i_mapping
, off
, old_eof
- 1);
3694 truncate_pagecache_range(inode
, off
, old_eof
);
3696 rc
= smb2_copychunk_range(xid
, cfile
, cfile
, off
+ len
,
3697 old_eof
- off
- len
, off
);
3701 eof
= cpu_to_le64(old_eof
- len
);
3702 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3703 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3709 cifsi
->server_eof
= i_size_read(inode
) - len
;
3710 truncate_setsize(inode
, cifsi
->server_eof
);
3711 fscache_resize_cookie(cifs_inode_cookie(inode
), cifsi
->server_eof
);
3713 filemap_invalidate_unlock(inode
->i_mapping
);
3715 inode_unlock(inode
);
3720 static long smb3_insert_range(struct file
*file
, struct cifs_tcon
*tcon
,
3721 loff_t off
, loff_t len
)
3725 struct cifsFileInfo
*cfile
= file
->private_data
;
3726 struct inode
*inode
= file_inode(file
);
3728 __u64 count
, old_eof
;
3734 old_eof
= i_size_read(inode
);
3735 if (off
>= old_eof
) {
3740 count
= old_eof
- off
;
3741 eof
= cpu_to_le64(old_eof
+ len
);
3743 filemap_invalidate_lock(inode
->i_mapping
);
3744 rc
= filemap_write_and_wait_range(inode
->i_mapping
, off
, old_eof
+ len
- 1);
3747 truncate_pagecache_range(inode
, off
, old_eof
);
3749 rc
= SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
3750 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
3754 rc
= smb2_copychunk_range(xid
, cfile
, cfile
, off
, count
, off
+ len
);
3758 rc
= smb3_zero_data(file
, tcon
, off
, len
, xid
);
3764 filemap_invalidate_unlock(inode
->i_mapping
);
3766 inode_unlock(inode
);
3771 static loff_t
smb3_llseek(struct file
*file
, struct cifs_tcon
*tcon
, loff_t offset
, int whence
)
3773 struct cifsFileInfo
*wrcfile
, *cfile
= file
->private_data
;
3774 struct cifsInodeInfo
*cifsi
;
3775 struct inode
*inode
;
3777 struct file_allocated_range_buffer in_data
, *out_data
= NULL
;
3781 if (whence
!= SEEK_HOLE
&& whence
!= SEEK_DATA
)
3782 return generic_file_llseek(file
, offset
, whence
);
3784 inode
= d_inode(cfile
->dentry
);
3785 cifsi
= CIFS_I(inode
);
3787 if (offset
< 0 || offset
>= i_size_read(inode
))
3792 * We need to be sure that all dirty pages are written as they
3793 * might fill holes on the server.
3794 * Note that we also MUST flush any written pages since at least
3795 * some servers (Windows2016) will not reflect recent writes in
3796 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3798 wrcfile
= find_writable_file(cifsi
, FIND_WR_ANY
);
3800 filemap_write_and_wait(inode
->i_mapping
);
3801 smb2_flush_file(xid
, tcon
, &wrcfile
->fid
);
3802 cifsFileInfo_put(wrcfile
);
3805 if (!(cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
)) {
3806 if (whence
== SEEK_HOLE
)
3807 offset
= i_size_read(inode
);
3811 in_data
.file_offset
= cpu_to_le64(offset
);
3812 in_data
.length
= cpu_to_le64(i_size_read(inode
));
3814 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3815 cfile
->fid
.volatile_fid
,
3816 FSCTL_QUERY_ALLOCATED_RANGES
,
3817 (char *)&in_data
, sizeof(in_data
),
3818 sizeof(struct file_allocated_range_buffer
),
3819 (char **)&out_data
, &out_data_len
);
3825 if (whence
== SEEK_HOLE
&& out_data_len
== 0)
3828 if (whence
== SEEK_DATA
&& out_data_len
== 0) {
3833 if (out_data_len
< sizeof(struct file_allocated_range_buffer
)) {
3837 if (whence
== SEEK_DATA
) {
3838 offset
= le64_to_cpu(out_data
->file_offset
);
3841 if (offset
< le64_to_cpu(out_data
->file_offset
))
3844 offset
= le64_to_cpu(out_data
->file_offset
) + le64_to_cpu(out_data
->length
);
3850 return vfs_setpos(file
, offset
, inode
->i_sb
->s_maxbytes
);
3855 static int smb3_fiemap(struct cifs_tcon
*tcon
,
3856 struct cifsFileInfo
*cfile
,
3857 struct fiemap_extent_info
*fei
, u64 start
, u64 len
)
3860 struct file_allocated_range_buffer in_data
, *out_data
;
3862 int i
, num
, rc
, flags
, last_blob
;
3865 rc
= fiemap_prep(d_inode(cfile
->dentry
), fei
, start
, &len
, 0);
3871 in_data
.file_offset
= cpu_to_le64(start
);
3872 in_data
.length
= cpu_to_le64(len
);
3874 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
3875 cfile
->fid
.volatile_fid
,
3876 FSCTL_QUERY_ALLOCATED_RANGES
,
3877 (char *)&in_data
, sizeof(in_data
),
3878 1024 * sizeof(struct file_allocated_range_buffer
),
3879 (char **)&out_data
, &out_data_len
);
3888 if (out_data_len
&& out_data_len
< sizeof(struct file_allocated_range_buffer
)) {
3892 if (out_data_len
% sizeof(struct file_allocated_range_buffer
)) {
3897 num
= out_data_len
/ sizeof(struct file_allocated_range_buffer
);
3898 for (i
= 0; i
< num
; i
++) {
3900 if (i
== num
- 1 && last_blob
)
3901 flags
|= FIEMAP_EXTENT_LAST
;
3903 rc
= fiemap_fill_next_extent(fei
,
3904 le64_to_cpu(out_data
[i
].file_offset
),
3905 le64_to_cpu(out_data
[i
].file_offset
),
3906 le64_to_cpu(out_data
[i
].length
),
3917 next
= le64_to_cpu(out_data
[num
- 1].file_offset
) +
3918 le64_to_cpu(out_data
[num
- 1].length
);
3919 len
= len
- (next
- start
);
3930 static long smb3_fallocate(struct file
*file
, struct cifs_tcon
*tcon
, int mode
,
3931 loff_t off
, loff_t len
)
3933 /* KEEP_SIZE already checked for by do_fallocate */
3934 if (mode
& FALLOC_FL_PUNCH_HOLE
)
3935 return smb3_punch_hole(file
, tcon
, off
, len
);
3936 else if (mode
& FALLOC_FL_ZERO_RANGE
) {
3937 if (mode
& FALLOC_FL_KEEP_SIZE
)
3938 return smb3_zero_range(file
, tcon
, off
, len
, true);
3939 return smb3_zero_range(file
, tcon
, off
, len
, false);
3940 } else if (mode
== FALLOC_FL_KEEP_SIZE
)
3941 return smb3_simple_falloc(file
, tcon
, off
, len
, true);
3942 else if (mode
== FALLOC_FL_COLLAPSE_RANGE
)
3943 return smb3_collapse_range(file
, tcon
, off
, len
);
3944 else if (mode
== FALLOC_FL_INSERT_RANGE
)
3945 return smb3_insert_range(file
, tcon
, off
, len
);
3947 return smb3_simple_falloc(file
, tcon
, off
, len
, false);
3953 smb2_downgrade_oplock(struct TCP_Server_Info
*server
,
3954 struct cifsInodeInfo
*cinode
, __u32 oplock
,
3955 unsigned int epoch
, bool *purge_cache
)
3957 server
->ops
->set_oplock_level(cinode
, oplock
, 0, NULL
);
3961 smb21_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
3962 unsigned int epoch
, bool *purge_cache
);
3965 smb3_downgrade_oplock(struct TCP_Server_Info
*server
,
3966 struct cifsInodeInfo
*cinode
, __u32 oplock
,
3967 unsigned int epoch
, bool *purge_cache
)
3969 unsigned int old_state
= cinode
->oplock
;
3970 unsigned int old_epoch
= cinode
->epoch
;
3971 unsigned int new_state
;
3973 if (epoch
> old_epoch
) {
3974 smb21_set_oplock_level(cinode
, oplock
, 0, NULL
);
3975 cinode
->epoch
= epoch
;
3978 new_state
= cinode
->oplock
;
3979 *purge_cache
= false;
3981 if ((old_state
& CIFS_CACHE_READ_FLG
) != 0 &&
3982 (new_state
& CIFS_CACHE_READ_FLG
) == 0)
3983 *purge_cache
= true;
3984 else if (old_state
== new_state
&& (epoch
- old_epoch
> 1))
3985 *purge_cache
= true;
3989 smb2_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
3990 unsigned int epoch
, bool *purge_cache
)
3993 cinode
->lease_granted
= false;
3994 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
3996 if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
3997 cinode
->oplock
= CIFS_CACHE_RHW_FLG
;
3998 cifs_dbg(FYI
, "Batch Oplock granted on inode %p\n",
3999 &cinode
->netfs
.inode
);
4000 } else if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
) {
4001 cinode
->oplock
= CIFS_CACHE_RW_FLG
;
4002 cifs_dbg(FYI
, "Exclusive Oplock granted on inode %p\n",
4003 &cinode
->netfs
.inode
);
4004 } else if (oplock
== SMB2_OPLOCK_LEVEL_II
) {
4005 cinode
->oplock
= CIFS_CACHE_READ_FLG
;
4006 cifs_dbg(FYI
, "Level II Oplock granted on inode %p\n",
4007 &cinode
->netfs
.inode
);
4013 smb21_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
4014 unsigned int epoch
, bool *purge_cache
)
4016 char message
[5] = {0};
4017 unsigned int new_oplock
= 0;
4020 cinode
->lease_granted
= true;
4021 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
4024 /* Check if the server granted an oplock rather than a lease */
4025 if (oplock
& SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
4026 return smb2_set_oplock_level(cinode
, oplock
, epoch
,
4029 if (oplock
& SMB2_LEASE_READ_CACHING_HE
) {
4030 new_oplock
|= CIFS_CACHE_READ_FLG
;
4031 strcat(message
, "R");
4033 if (oplock
& SMB2_LEASE_HANDLE_CACHING_HE
) {
4034 new_oplock
|= CIFS_CACHE_HANDLE_FLG
;
4035 strcat(message
, "H");
4037 if (oplock
& SMB2_LEASE_WRITE_CACHING_HE
) {
4038 new_oplock
|= CIFS_CACHE_WRITE_FLG
;
4039 strcat(message
, "W");
4042 strncpy(message
, "None", sizeof(message
));
4044 cinode
->oplock
= new_oplock
;
4045 cifs_dbg(FYI
, "%s Lease granted on inode %p\n", message
,
4046 &cinode
->netfs
.inode
);
4050 smb3_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
4051 unsigned int epoch
, bool *purge_cache
)
4053 unsigned int old_oplock
= cinode
->oplock
;
4055 smb21_set_oplock_level(cinode
, oplock
, epoch
, purge_cache
);
4058 *purge_cache
= false;
4059 if (old_oplock
== CIFS_CACHE_READ_FLG
) {
4060 if (cinode
->oplock
== CIFS_CACHE_READ_FLG
&&
4061 (epoch
- cinode
->epoch
> 0))
4062 *purge_cache
= true;
4063 else if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
4064 (epoch
- cinode
->epoch
> 1))
4065 *purge_cache
= true;
4066 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
4067 (epoch
- cinode
->epoch
> 1))
4068 *purge_cache
= true;
4069 else if (cinode
->oplock
== 0 &&
4070 (epoch
- cinode
->epoch
> 0))
4071 *purge_cache
= true;
4072 } else if (old_oplock
== CIFS_CACHE_RH_FLG
) {
4073 if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
4074 (epoch
- cinode
->epoch
> 0))
4075 *purge_cache
= true;
4076 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
4077 (epoch
- cinode
->epoch
> 1))
4078 *purge_cache
= true;
4080 cinode
->epoch
= epoch
;
4084 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4086 smb2_is_read_op(__u32 oplock
)
4088 return oplock
== SMB2_OPLOCK_LEVEL_II
;
4090 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4093 smb21_is_read_op(__u32 oplock
)
4095 return (oplock
& SMB2_LEASE_READ_CACHING_HE
) &&
4096 !(oplock
& SMB2_LEASE_WRITE_CACHING_HE
);
4100 map_oplock_to_lease(u8 oplock
)
4102 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
4103 return SMB2_LEASE_WRITE_CACHING_LE
| SMB2_LEASE_READ_CACHING_LE
;
4104 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
4105 return SMB2_LEASE_READ_CACHING_LE
;
4106 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
4107 return SMB2_LEASE_HANDLE_CACHING_LE
| SMB2_LEASE_READ_CACHING_LE
|
4108 SMB2_LEASE_WRITE_CACHING_LE
;
4113 smb2_create_lease_buf(u8
*lease_key
, u8 oplock
)
4115 struct create_lease
*buf
;
4117 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
4121 memcpy(&buf
->lcontext
.LeaseKey
, lease_key
, SMB2_LEASE_KEY_SIZE
);
4122 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
4124 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
4125 (struct create_lease
, lcontext
));
4126 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
4127 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
4128 (struct create_lease
, Name
));
4129 buf
->ccontext
.NameLength
= cpu_to_le16(4);
4130 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4139 smb3_create_lease_buf(u8
*lease_key
, u8 oplock
)
4141 struct create_lease_v2
*buf
;
4143 buf
= kzalloc(sizeof(struct create_lease_v2
), GFP_KERNEL
);
4147 memcpy(&buf
->lcontext
.LeaseKey
, lease_key
, SMB2_LEASE_KEY_SIZE
);
4148 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
4150 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
4151 (struct create_lease_v2
, lcontext
));
4152 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context_v2
));
4153 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
4154 (struct create_lease_v2
, Name
));
4155 buf
->ccontext
.NameLength
= cpu_to_le16(4);
4156 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4165 smb2_parse_lease_buf(void *buf
, unsigned int *epoch
, char *lease_key
)
4167 struct create_lease
*lc
= (struct create_lease
*)buf
;
4169 *epoch
= 0; /* not used */
4170 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE
)
4171 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
4172 return le32_to_cpu(lc
->lcontext
.LeaseState
);
4176 smb3_parse_lease_buf(void *buf
, unsigned int *epoch
, char *lease_key
)
4178 struct create_lease_v2
*lc
= (struct create_lease_v2
*)buf
;
4180 *epoch
= le16_to_cpu(lc
->lcontext
.Epoch
);
4181 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE
)
4182 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
4184 memcpy(lease_key
, &lc
->lcontext
.LeaseKey
, SMB2_LEASE_KEY_SIZE
);
4185 return le32_to_cpu(lc
->lcontext
.LeaseState
);
4189 smb2_wp_retry_size(struct inode
*inode
)
4191 return min_t(unsigned int, CIFS_SB(inode
->i_sb
)->ctx
->wsize
,
4192 SMB2_MAX_BUFFER_SIZE
);
4196 smb2_dir_needs_close(struct cifsFileInfo
*cfile
)
4198 return !cfile
->invalidHandle
;
4202 fill_transform_hdr(struct smb2_transform_hdr
*tr_hdr
, unsigned int orig_len
,
4203 struct smb_rqst
*old_rq
, __le16 cipher_type
)
4205 struct smb2_hdr
*shdr
=
4206 (struct smb2_hdr
*)old_rq
->rq_iov
[0].iov_base
;
4208 memset(tr_hdr
, 0, sizeof(struct smb2_transform_hdr
));
4209 tr_hdr
->ProtocolId
= SMB2_TRANSFORM_PROTO_NUM
;
4210 tr_hdr
->OriginalMessageSize
= cpu_to_le32(orig_len
);
4211 tr_hdr
->Flags
= cpu_to_le16(0x01);
4212 if ((cipher_type
== SMB2_ENCRYPTION_AES128_GCM
) ||
4213 (cipher_type
== SMB2_ENCRYPTION_AES256_GCM
))
4214 get_random_bytes(&tr_hdr
->Nonce
, SMB3_AES_GCM_NONCE
);
4216 get_random_bytes(&tr_hdr
->Nonce
, SMB3_AES_CCM_NONCE
);
4217 memcpy(&tr_hdr
->SessionId
, &shdr
->SessionId
, 8);
4220 /* We can not use the normal sg_set_buf() as we will sometimes pass a
4221 * stack object as buf.
4223 static inline void smb2_sg_set_buf(struct scatterlist
*sg
, const void *buf
,
4224 unsigned int buflen
)
4228 * VMAP_STACK (at least) puts stack into the vmalloc address space
4230 if (is_vmalloc_addr(buf
))
4231 addr
= vmalloc_to_page(buf
);
4233 addr
= virt_to_page(buf
);
4234 sg_set_page(sg
, addr
, buflen
, offset_in_page(buf
));
4237 /* Assumes the first rqst has a transform header as the first iov.
4239 * rqst[0].rq_iov[0] is transform header
4240 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4241 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4243 static struct scatterlist
*
4244 init_sg(int num_rqst
, struct smb_rqst
*rqst
, u8
*sign
)
4246 unsigned int sg_len
;
4247 struct scatterlist
*sg
;
4250 unsigned int idx
= 0;
4254 for (i
= 0; i
< num_rqst
; i
++)
4255 sg_len
+= rqst
[i
].rq_nvec
+ rqst
[i
].rq_npages
;
4257 sg
= kmalloc_array(sg_len
, sizeof(struct scatterlist
), GFP_KERNEL
);
4261 sg_init_table(sg
, sg_len
);
4262 for (i
= 0; i
< num_rqst
; i
++) {
4263 for (j
= 0; j
< rqst
[i
].rq_nvec
; j
++) {
4265 * The first rqst has a transform header where the
4266 * first 20 bytes are not part of the encrypted blob
4268 skip
= (i
== 0) && (j
== 0) ? 20 : 0;
4269 smb2_sg_set_buf(&sg
[idx
++],
4270 rqst
[i
].rq_iov
[j
].iov_base
+ skip
,
4271 rqst
[i
].rq_iov
[j
].iov_len
- skip
);
4274 for (j
= 0; j
< rqst
[i
].rq_npages
; j
++) {
4275 unsigned int len
, offset
;
4277 rqst_page_get_length(&rqst
[i
], j
, &len
, &offset
);
4278 sg_set_page(&sg
[idx
++], rqst
[i
].rq_pages
[j
], len
, offset
);
4281 smb2_sg_set_buf(&sg
[idx
], sign
, SMB2_SIGNATURE_SIZE
);
4286 smb2_get_enc_key(struct TCP_Server_Info
*server
, __u64 ses_id
, int enc
, u8
*key
)
4288 struct cifs_ses
*ses
;
4291 spin_lock(&cifs_tcp_ses_lock
);
4292 list_for_each_entry(server
, &cifs_tcp_ses_list
, tcp_ses_list
) {
4293 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
4294 if (ses
->Suid
== ses_id
) {
4295 spin_lock(&ses
->ses_lock
);
4296 ses_enc_key
= enc
? ses
->smb3encryptionkey
:
4297 ses
->smb3decryptionkey
;
4298 memcpy(key
, ses_enc_key
, SMB3_ENC_DEC_KEY_SIZE
);
4299 spin_unlock(&ses
->ses_lock
);
4300 spin_unlock(&cifs_tcp_ses_lock
);
4305 spin_unlock(&cifs_tcp_ses_lock
);
4310 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4311 * iov[0] - transform header (associate data),
4312 * iov[1-N] - SMB2 header and pages - data to encrypt.
4313 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4317 crypt_message(struct TCP_Server_Info
*server
, int num_rqst
,
4318 struct smb_rqst
*rqst
, int enc
)
4320 struct smb2_transform_hdr
*tr_hdr
=
4321 (struct smb2_transform_hdr
*)rqst
[0].rq_iov
[0].iov_base
;
4322 unsigned int assoc_data_len
= sizeof(struct smb2_transform_hdr
) - 20;
4324 struct scatterlist
*sg
;
4325 u8 sign
[SMB2_SIGNATURE_SIZE
] = {};
4326 u8 key
[SMB3_ENC_DEC_KEY_SIZE
];
4327 struct aead_request
*req
;
4329 unsigned int iv_len
;
4330 DECLARE_CRYPTO_WAIT(wait
);
4331 struct crypto_aead
*tfm
;
4332 unsigned int crypt_len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
);
4334 rc
= smb2_get_enc_key(server
, le64_to_cpu(tr_hdr
->SessionId
), enc
, key
);
4336 cifs_server_dbg(VFS
, "%s: Could not get %scryption key\n", __func__
,
4341 rc
= smb3_crypto_aead_allocate(server
);
4343 cifs_server_dbg(VFS
, "%s: crypto alloc failed\n", __func__
);
4347 tfm
= enc
? server
->secmech
.ccmaesencrypt
:
4348 server
->secmech
.ccmaesdecrypt
;
4350 if ((server
->cipher_type
== SMB2_ENCRYPTION_AES256_CCM
) ||
4351 (server
->cipher_type
== SMB2_ENCRYPTION_AES256_GCM
))
4352 rc
= crypto_aead_setkey(tfm
, key
, SMB3_GCM256_CRYPTKEY_SIZE
);
4354 rc
= crypto_aead_setkey(tfm
, key
, SMB3_GCM128_CRYPTKEY_SIZE
);
4357 cifs_server_dbg(VFS
, "%s: Failed to set aead key %d\n", __func__
, rc
);
4361 rc
= crypto_aead_setauthsize(tfm
, SMB2_SIGNATURE_SIZE
);
4363 cifs_server_dbg(VFS
, "%s: Failed to set authsize %d\n", __func__
, rc
);
4367 req
= aead_request_alloc(tfm
, GFP_KERNEL
);
4369 cifs_server_dbg(VFS
, "%s: Failed to alloc aead request\n", __func__
);
4374 memcpy(sign
, &tr_hdr
->Signature
, SMB2_SIGNATURE_SIZE
);
4375 crypt_len
+= SMB2_SIGNATURE_SIZE
;
4378 sg
= init_sg(num_rqst
, rqst
, sign
);
4380 cifs_server_dbg(VFS
, "%s: Failed to init sg\n", __func__
);
4385 iv_len
= crypto_aead_ivsize(tfm
);
4386 iv
= kzalloc(iv_len
, GFP_KERNEL
);
4388 cifs_server_dbg(VFS
, "%s: Failed to alloc iv\n", __func__
);
4393 if ((server
->cipher_type
== SMB2_ENCRYPTION_AES128_GCM
) ||
4394 (server
->cipher_type
== SMB2_ENCRYPTION_AES256_GCM
))
4395 memcpy(iv
, (char *)tr_hdr
->Nonce
, SMB3_AES_GCM_NONCE
);
4398 memcpy(iv
+ 1, (char *)tr_hdr
->Nonce
, SMB3_AES_CCM_NONCE
);
4401 aead_request_set_crypt(req
, sg
, sg
, crypt_len
, iv
);
4402 aead_request_set_ad(req
, assoc_data_len
);
4404 aead_request_set_callback(req
, CRYPTO_TFM_REQ_MAY_BACKLOG
,
4405 crypto_req_done
, &wait
);
4407 rc
= crypto_wait_req(enc
? crypto_aead_encrypt(req
)
4408 : crypto_aead_decrypt(req
), &wait
);
4411 memcpy(&tr_hdr
->Signature
, sign
, SMB2_SIGNATURE_SIZE
);
4422 smb3_free_compound_rqst(int num_rqst
, struct smb_rqst
*rqst
)
4426 for (i
= 0; i
< num_rqst
; i
++) {
4427 if (rqst
[i
].rq_pages
) {
4428 for (j
= rqst
[i
].rq_npages
- 1; j
>= 0; j
--)
4429 put_page(rqst
[i
].rq_pages
[j
]);
4430 kfree(rqst
[i
].rq_pages
);
4436 * This function will initialize new_rq and encrypt the content.
4437 * The first entry, new_rq[0], only contains a single iov which contains
4438 * a smb2_transform_hdr and is pre-allocated by the caller.
4439 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4441 * The end result is an array of smb_rqst structures where the first structure
4442 * only contains a single iov for the transform header which we then can pass
4443 * to crypt_message().
4445 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4446 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4449 smb3_init_transform_rq(struct TCP_Server_Info
*server
, int num_rqst
,
4450 struct smb_rqst
*new_rq
, struct smb_rqst
*old_rq
)
4452 struct page
**pages
;
4453 struct smb2_transform_hdr
*tr_hdr
= new_rq
[0].rq_iov
[0].iov_base
;
4454 unsigned int npages
;
4455 unsigned int orig_len
= 0;
4459 for (i
= 1; i
< num_rqst
; i
++) {
4460 npages
= old_rq
[i
- 1].rq_npages
;
4461 pages
= kmalloc_array(npages
, sizeof(struct page
*),
4466 new_rq
[i
].rq_pages
= pages
;
4467 new_rq
[i
].rq_npages
= npages
;
4468 new_rq
[i
].rq_offset
= old_rq
[i
- 1].rq_offset
;
4469 new_rq
[i
].rq_pagesz
= old_rq
[i
- 1].rq_pagesz
;
4470 new_rq
[i
].rq_tailsz
= old_rq
[i
- 1].rq_tailsz
;
4471 new_rq
[i
].rq_iov
= old_rq
[i
- 1].rq_iov
;
4472 new_rq
[i
].rq_nvec
= old_rq
[i
- 1].rq_nvec
;
4474 orig_len
+= smb_rqst_len(server
, &old_rq
[i
- 1]);
4476 for (j
= 0; j
< npages
; j
++) {
4477 pages
[j
] = alloc_page(GFP_KERNEL
|__GFP_HIGHMEM
);
4482 /* copy pages form the old */
4483 for (j
= 0; j
< npages
; j
++) {
4485 unsigned int offset
, len
;
4487 rqst_page_get_length(&new_rq
[i
], j
, &len
, &offset
);
4489 dst
= (char *) kmap(new_rq
[i
].rq_pages
[j
]) + offset
;
4490 src
= (char *) kmap(old_rq
[i
- 1].rq_pages
[j
]) + offset
;
4492 memcpy(dst
, src
, len
);
4493 kunmap(new_rq
[i
].rq_pages
[j
]);
4494 kunmap(old_rq
[i
- 1].rq_pages
[j
]);
4498 /* fill the 1st iov with a transform header */
4499 fill_transform_hdr(tr_hdr
, orig_len
, old_rq
, server
->cipher_type
);
4501 rc
= crypt_message(server
, num_rqst
, new_rq
, 1);
4502 cifs_dbg(FYI
, "Encrypt message returned %d\n", rc
);
4509 smb3_free_compound_rqst(num_rqst
- 1, &new_rq
[1]);
4514 smb3_is_transform_hdr(void *buf
)
4516 struct smb2_transform_hdr
*trhdr
= buf
;
4518 return trhdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
;
4522 decrypt_raw_data(struct TCP_Server_Info
*server
, char *buf
,
4523 unsigned int buf_data_size
, struct page
**pages
,
4524 unsigned int npages
, unsigned int page_data_size
,
4528 struct smb_rqst rqst
= {NULL
};
4531 iov
[0].iov_base
= buf
;
4532 iov
[0].iov_len
= sizeof(struct smb2_transform_hdr
);
4533 iov
[1].iov_base
= buf
+ sizeof(struct smb2_transform_hdr
);
4534 iov
[1].iov_len
= buf_data_size
;
4538 rqst
.rq_pages
= pages
;
4539 rqst
.rq_npages
= npages
;
4540 rqst
.rq_pagesz
= PAGE_SIZE
;
4541 rqst
.rq_tailsz
= (page_data_size
% PAGE_SIZE
) ? : PAGE_SIZE
;
4543 rc
= crypt_message(server
, 1, &rqst
, 0);
4544 cifs_dbg(FYI
, "Decrypt message returned %d\n", rc
);
4549 memmove(buf
, iov
[1].iov_base
, buf_data_size
);
4552 server
->total_read
= buf_data_size
+ page_data_size
;
4558 read_data_into_pages(struct TCP_Server_Info
*server
, struct page
**pages
,
4559 unsigned int npages
, unsigned int len
)
4564 for (i
= 0; i
< npages
; i
++) {
4565 struct page
*page
= pages
[i
];
4569 if (len
>= PAGE_SIZE
) {
4570 /* enough data to fill the page */
4574 zero_user(page
, len
, PAGE_SIZE
- len
);
4577 length
= cifs_read_page_from_socket(server
, page
, 0, n
);
4580 server
->total_read
+= length
;
4587 init_read_bvec(struct page
**pages
, unsigned int npages
, unsigned int data_size
,
4588 unsigned int cur_off
, struct bio_vec
**page_vec
)
4590 struct bio_vec
*bvec
;
4593 bvec
= kcalloc(npages
, sizeof(struct bio_vec
), GFP_KERNEL
);
4597 for (i
= 0; i
< npages
; i
++) {
4598 bvec
[i
].bv_page
= pages
[i
];
4599 bvec
[i
].bv_offset
= (i
== 0) ? cur_off
: 0;
4600 bvec
[i
].bv_len
= min_t(unsigned int, PAGE_SIZE
, data_size
);
4601 data_size
-= bvec
[i
].bv_len
;
4604 if (data_size
!= 0) {
4605 cifs_dbg(VFS
, "%s: something went wrong\n", __func__
);
4615 handle_read_data(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
,
4616 char *buf
, unsigned int buf_len
, struct page
**pages
,
4617 unsigned int npages
, unsigned int page_data_size
,
4620 unsigned int data_offset
;
4621 unsigned int data_len
;
4622 unsigned int cur_off
;
4623 unsigned int cur_page_idx
;
4624 unsigned int pad_len
;
4625 struct cifs_readdata
*rdata
= mid
->callback_data
;
4626 struct smb2_hdr
*shdr
= (struct smb2_hdr
*)buf
;
4627 struct bio_vec
*bvec
= NULL
;
4628 struct iov_iter iter
;
4631 bool use_rdma_mr
= false;
4633 if (shdr
->Command
!= SMB2_READ
) {
4634 cifs_server_dbg(VFS
, "only big read responses are supported\n");
4638 if (server
->ops
->is_session_expired
&&
4639 server
->ops
->is_session_expired(buf
)) {
4641 cifs_reconnect(server
, true);
4645 if (server
->ops
->is_status_pending
&&
4646 server
->ops
->is_status_pending(buf
, server
))
4649 /* set up first two iov to get credits */
4650 rdata
->iov
[0].iov_base
= buf
;
4651 rdata
->iov
[0].iov_len
= 0;
4652 rdata
->iov
[1].iov_base
= buf
;
4653 rdata
->iov
[1].iov_len
=
4654 min_t(unsigned int, buf_len
, server
->vals
->read_rsp_size
);
4655 cifs_dbg(FYI
, "0: iov_base=%p iov_len=%zu\n",
4656 rdata
->iov
[0].iov_base
, rdata
->iov
[0].iov_len
);
4657 cifs_dbg(FYI
, "1: iov_base=%p iov_len=%zu\n",
4658 rdata
->iov
[1].iov_base
, rdata
->iov
[1].iov_len
);
4660 rdata
->result
= server
->ops
->map_error(buf
, true);
4661 if (rdata
->result
!= 0) {
4662 cifs_dbg(FYI
, "%s: server returned error %d\n",
4663 __func__
, rdata
->result
);
4664 /* normal error on read response */
4666 mid
->mid_state
= MID_RESPONSE_RECEIVED
;
4668 dequeue_mid(mid
, false);
4672 data_offset
= server
->ops
->read_data_offset(buf
);
4673 #ifdef CONFIG_CIFS_SMB_DIRECT
4674 use_rdma_mr
= rdata
->mr
;
4676 data_len
= server
->ops
->read_data_length(buf
, use_rdma_mr
);
4678 if (data_offset
< server
->vals
->read_rsp_size
) {
4680 * win2k8 sometimes sends an offset of 0 when the read
4681 * is beyond the EOF. Treat it as if the data starts just after
4684 cifs_dbg(FYI
, "%s: data offset (%u) inside read response header\n",
4685 __func__
, data_offset
);
4686 data_offset
= server
->vals
->read_rsp_size
;
4687 } else if (data_offset
> MAX_CIFS_SMALL_BUFFER_SIZE
) {
4688 /* data_offset is beyond the end of smallbuf */
4689 cifs_dbg(FYI
, "%s: data offset (%u) beyond end of smallbuf\n",
4690 __func__
, data_offset
);
4691 rdata
->result
= -EIO
;
4693 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4695 dequeue_mid(mid
, rdata
->result
);
4699 pad_len
= data_offset
- server
->vals
->read_rsp_size
;
4701 if (buf_len
<= data_offset
) {
4702 /* read response payload is in pages */
4703 cur_page_idx
= pad_len
/ PAGE_SIZE
;
4704 cur_off
= pad_len
% PAGE_SIZE
;
4706 if (cur_page_idx
!= 0) {
4707 /* data offset is beyond the 1st page of response */
4708 cifs_dbg(FYI
, "%s: data offset (%u) beyond 1st page of response\n",
4709 __func__
, data_offset
);
4710 rdata
->result
= -EIO
;
4712 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4714 dequeue_mid(mid
, rdata
->result
);
4718 if (data_len
> page_data_size
- pad_len
) {
4719 /* data_len is corrupt -- discard frame */
4720 rdata
->result
= -EIO
;
4722 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4724 dequeue_mid(mid
, rdata
->result
);
4728 rdata
->result
= init_read_bvec(pages
, npages
, page_data_size
,
4730 if (rdata
->result
!= 0) {
4732 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4734 dequeue_mid(mid
, rdata
->result
);
4738 iov_iter_bvec(&iter
, WRITE
, bvec
, npages
, data_len
);
4739 } else if (buf_len
>= data_offset
+ data_len
) {
4740 /* read response payload is in buf */
4741 WARN_ONCE(npages
> 0, "read data can be either in buf or in pages");
4742 iov
.iov_base
= buf
+ data_offset
;
4743 iov
.iov_len
= data_len
;
4744 iov_iter_kvec(&iter
, WRITE
, &iov
, 1, data_len
);
4746 /* read response payload cannot be in both buf and pages */
4747 WARN_ONCE(1, "buf can not contain only a part of read data");
4748 rdata
->result
= -EIO
;
4750 mid
->mid_state
= MID_RESPONSE_MALFORMED
;
4752 dequeue_mid(mid
, rdata
->result
);
4756 length
= rdata
->copy_into_pages(server
, rdata
, &iter
);
4764 mid
->mid_state
= MID_RESPONSE_RECEIVED
;
4766 dequeue_mid(mid
, false);
4770 struct smb2_decrypt_work
{
4771 struct work_struct decrypt
;
4772 struct TCP_Server_Info
*server
;
4773 struct page
**ppages
;
4775 unsigned int npages
;
4780 static void smb2_decrypt_offload(struct work_struct
*work
)
4782 struct smb2_decrypt_work
*dw
= container_of(work
,
4783 struct smb2_decrypt_work
, decrypt
);
4785 struct mid_q_entry
*mid
;
4787 rc
= decrypt_raw_data(dw
->server
, dw
->buf
, dw
->server
->vals
->read_rsp_size
,
4788 dw
->ppages
, dw
->npages
, dw
->len
, true);
4790 cifs_dbg(VFS
, "error decrypting rc=%d\n", rc
);
4794 dw
->server
->lstrp
= jiffies
;
4795 mid
= smb2_find_dequeue_mid(dw
->server
, dw
->buf
);
4797 cifs_dbg(FYI
, "mid not found\n");
4799 mid
->decrypted
= true;
4800 rc
= handle_read_data(dw
->server
, mid
, dw
->buf
,
4801 dw
->server
->vals
->read_rsp_size
,
4802 dw
->ppages
, dw
->npages
, dw
->len
,
4805 #ifdef CONFIG_CIFS_STATS2
4806 mid
->when_received
= jiffies
;
4808 if (dw
->server
->ops
->is_network_name_deleted
)
4809 dw
->server
->ops
->is_network_name_deleted(dw
->buf
,
4814 spin_lock(&dw
->server
->srv_lock
);
4815 if (dw
->server
->tcpStatus
== CifsNeedReconnect
) {
4816 spin_lock(&dw
->server
->mid_lock
);
4817 mid
->mid_state
= MID_RETRY_NEEDED
;
4818 spin_unlock(&dw
->server
->mid_lock
);
4819 spin_unlock(&dw
->server
->srv_lock
);
4822 spin_lock(&dw
->server
->mid_lock
);
4823 mid
->mid_state
= MID_REQUEST_SUBMITTED
;
4824 mid
->mid_flags
&= ~(MID_DELETED
);
4825 list_add_tail(&mid
->qhead
,
4826 &dw
->server
->pending_mid_q
);
4827 spin_unlock(&dw
->server
->mid_lock
);
4828 spin_unlock(&dw
->server
->srv_lock
);
4835 for (i
= dw
->npages
-1; i
>= 0; i
--)
4836 put_page(dw
->ppages
[i
]);
4839 cifs_small_buf_release(dw
->buf
);
4845 receive_encrypted_read(struct TCP_Server_Info
*server
, struct mid_q_entry
**mid
,
4848 char *buf
= server
->smallbuf
;
4849 struct smb2_transform_hdr
*tr_hdr
= (struct smb2_transform_hdr
*)buf
;
4850 unsigned int npages
;
4851 struct page
**pages
;
4853 unsigned int buflen
= server
->pdu_size
;
4856 struct smb2_decrypt_work
*dw
;
4859 len
= min_t(unsigned int, buflen
, server
->vals
->read_rsp_size
+
4860 sizeof(struct smb2_transform_hdr
)) - HEADER_SIZE(server
) + 1;
4862 rc
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1, len
);
4865 server
->total_read
+= rc
;
4867 len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
) -
4868 server
->vals
->read_rsp_size
;
4869 npages
= DIV_ROUND_UP(len
, PAGE_SIZE
);
4871 pages
= kmalloc_array(npages
, sizeof(struct page
*), GFP_KERNEL
);
4877 for (; i
< npages
; i
++) {
4878 pages
[i
] = alloc_page(GFP_KERNEL
|__GFP_HIGHMEM
);
4885 /* read read data into pages */
4886 rc
= read_data_into_pages(server
, pages
, npages
, len
);
4890 rc
= cifs_discard_remaining_data(server
);
4895 * For large reads, offload to different thread for better performance,
4896 * use more cores decrypting which can be expensive
4899 if ((server
->min_offload
) && (server
->in_flight
> 1) &&
4900 (server
->pdu_size
>= server
->min_offload
)) {
4901 dw
= kmalloc(sizeof(struct smb2_decrypt_work
), GFP_KERNEL
);
4903 goto non_offloaded_decrypt
;
4905 dw
->buf
= server
->smallbuf
;
4906 server
->smallbuf
= (char *)cifs_small_buf_get();
4908 INIT_WORK(&dw
->decrypt
, smb2_decrypt_offload
);
4910 dw
->npages
= npages
;
4911 dw
->server
= server
;
4914 queue_work(decrypt_wq
, &dw
->decrypt
);
4915 *num_mids
= 0; /* worker thread takes care of finding mid */
4919 non_offloaded_decrypt
:
4920 rc
= decrypt_raw_data(server
, buf
, server
->vals
->read_rsp_size
,
4921 pages
, npages
, len
, false);
4925 *mid
= smb2_find_mid(server
, buf
);
4927 cifs_dbg(FYI
, "mid not found\n");
4929 cifs_dbg(FYI
, "mid found\n");
4930 (*mid
)->decrypted
= true;
4931 rc
= handle_read_data(server
, *mid
, buf
,
4932 server
->vals
->read_rsp_size
,
4933 pages
, npages
, len
, false);
4935 if (server
->ops
->is_network_name_deleted
) {
4936 server
->ops
->is_network_name_deleted(buf
,
4943 for (i
= i
- 1; i
>= 0; i
--)
4948 cifs_discard_remaining_data(server
);
4953 receive_encrypted_standard(struct TCP_Server_Info
*server
,
4954 struct mid_q_entry
**mids
, char **bufs
,
4958 char *buf
= server
->smallbuf
;
4959 struct smb2_hdr
*shdr
;
4960 unsigned int pdu_length
= server
->pdu_size
;
4961 unsigned int buf_size
;
4962 struct mid_q_entry
*mid_entry
;
4964 char *next_buffer
= NULL
;
4968 /* switch to large buffer if too big for a small one */
4969 if (pdu_length
> MAX_CIFS_SMALL_BUFFER_SIZE
) {
4970 server
->large_buf
= true;
4971 memcpy(server
->bigbuf
, buf
, server
->total_read
);
4972 buf
= server
->bigbuf
;
4975 /* now read the rest */
4976 length
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1,
4977 pdu_length
- HEADER_SIZE(server
) + 1);
4980 server
->total_read
+= length
;
4982 buf_size
= pdu_length
- sizeof(struct smb2_transform_hdr
);
4983 length
= decrypt_raw_data(server
, buf
, buf_size
, NULL
, 0, 0, false);
4987 next_is_large
= server
->large_buf
;
4989 shdr
= (struct smb2_hdr
*)buf
;
4990 if (shdr
->NextCommand
) {
4992 next_buffer
= (char *)cifs_buf_get();
4994 next_buffer
= (char *)cifs_small_buf_get();
4996 buf
+ le32_to_cpu(shdr
->NextCommand
),
4997 pdu_length
- le32_to_cpu(shdr
->NextCommand
));
5000 mid_entry
= smb2_find_mid(server
, buf
);
5001 if (mid_entry
== NULL
)
5002 cifs_dbg(FYI
, "mid not found\n");
5004 cifs_dbg(FYI
, "mid found\n");
5005 mid_entry
->decrypted
= true;
5006 mid_entry
->resp_buf_size
= server
->pdu_size
;
5009 if (*num_mids
>= MAX_COMPOUND
) {
5010 cifs_server_dbg(VFS
, "too many PDUs in compound\n");
5013 bufs
[*num_mids
] = buf
;
5014 mids
[(*num_mids
)++] = mid_entry
;
5016 if (mid_entry
&& mid_entry
->handle
)
5017 ret
= mid_entry
->handle(server
, mid_entry
);
5019 ret
= cifs_handle_standard(server
, mid_entry
);
5021 if (ret
== 0 && shdr
->NextCommand
) {
5022 pdu_length
-= le32_to_cpu(shdr
->NextCommand
);
5023 server
->large_buf
= next_is_large
;
5025 server
->bigbuf
= buf
= next_buffer
;
5027 server
->smallbuf
= buf
= next_buffer
;
5029 } else if (ret
!= 0) {
5031 * ret != 0 here means that we didn't get to handle_mid() thus
5032 * server->smallbuf and server->bigbuf are still valid. We need
5033 * to free next_buffer because it is not going to be used
5037 free_rsp_buf(CIFS_LARGE_BUFFER
, next_buffer
);
5039 free_rsp_buf(CIFS_SMALL_BUFFER
, next_buffer
);
5046 smb3_receive_transform(struct TCP_Server_Info
*server
,
5047 struct mid_q_entry
**mids
, char **bufs
, int *num_mids
)
5049 char *buf
= server
->smallbuf
;
5050 unsigned int pdu_length
= server
->pdu_size
;
5051 struct smb2_transform_hdr
*tr_hdr
= (struct smb2_transform_hdr
*)buf
;
5052 unsigned int orig_len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
);
5054 if (pdu_length
< sizeof(struct smb2_transform_hdr
) +
5055 sizeof(struct smb2_hdr
)) {
5056 cifs_server_dbg(VFS
, "Transform message is too small (%u)\n",
5058 cifs_reconnect(server
, true);
5059 return -ECONNABORTED
;
5062 if (pdu_length
< orig_len
+ sizeof(struct smb2_transform_hdr
)) {
5063 cifs_server_dbg(VFS
, "Transform message is broken\n");
5064 cifs_reconnect(server
, true);
5065 return -ECONNABORTED
;
5068 /* TODO: add support for compounds containing READ. */
5069 if (pdu_length
> CIFSMaxBufSize
+ MAX_HEADER_SIZE(server
)) {
5070 return receive_encrypted_read(server
, &mids
[0], num_mids
);
5073 return receive_encrypted_standard(server
, mids
, bufs
, num_mids
);
5077 smb3_handle_read_data(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
5079 char *buf
= server
->large_buf
? server
->bigbuf
: server
->smallbuf
;
5081 return handle_read_data(server
, mid
, buf
, server
->pdu_size
,
5086 smb2_next_header(char *buf
)
5088 struct smb2_hdr
*hdr
= (struct smb2_hdr
*)buf
;
5089 struct smb2_transform_hdr
*t_hdr
= (struct smb2_transform_hdr
*)buf
;
5091 if (hdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
)
5092 return sizeof(struct smb2_transform_hdr
) +
5093 le32_to_cpu(t_hdr
->OriginalMessageSize
);
5095 return le32_to_cpu(hdr
->NextCommand
);
5099 smb2_make_node(unsigned int xid
, struct inode
*inode
,
5100 struct dentry
*dentry
, struct cifs_tcon
*tcon
,
5101 const char *full_path
, umode_t mode
, dev_t dev
)
5103 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
5105 FILE_ALL_INFO
*buf
= NULL
;
5106 struct cifs_io_parms io_parms
= {0};
5108 struct cifs_fid fid
;
5109 struct cifs_open_parms oparms
;
5110 unsigned int bytes_written
;
5111 struct win_dev
*pdev
;
5115 * Check if mounted with mount parm 'sfu' mount parm.
5116 * SFU emulation should work with all servers, but only
5117 * supports block and char device (no socket & fifo),
5118 * and was used by default in earlier versions of Windows
5120 if (!(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
))
5124 * TODO: Add ability to create instead via reparse point. Windows (e.g.
5125 * their current NFS server) uses this approach to expose special files
5126 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5129 if (!S_ISCHR(mode
) && !S_ISBLK(mode
))
5132 cifs_dbg(FYI
, "sfu compat create special file\n");
5134 buf
= kmalloc(sizeof(FILE_ALL_INFO
), GFP_KERNEL
);
5141 oparms
.cifs_sb
= cifs_sb
;
5142 oparms
.desired_access
= GENERIC_WRITE
;
5143 oparms
.create_options
= cifs_create_options(cifs_sb
, CREATE_NOT_DIR
|
5144 CREATE_OPTION_SPECIAL
);
5145 oparms
.disposition
= FILE_CREATE
;
5146 oparms
.path
= full_path
;
5148 oparms
.reconnect
= false;
5150 if (tcon
->ses
->server
->oplocks
)
5151 oplock
= REQ_OPLOCK
;
5154 rc
= tcon
->ses
->server
->ops
->open(xid
, &oparms
, &oplock
, buf
);
5159 * BB Do not bother to decode buf since no local inode yet to put
5160 * timestamps in, but we can reuse it safely.
5163 pdev
= (struct win_dev
*)buf
;
5164 io_parms
.pid
= current
->tgid
;
5165 io_parms
.tcon
= tcon
;
5166 io_parms
.offset
= 0;
5167 io_parms
.length
= sizeof(struct win_dev
);
5168 iov
[1].iov_base
= buf
;
5169 iov
[1].iov_len
= sizeof(struct win_dev
);
5170 if (S_ISCHR(mode
)) {
5171 memcpy(pdev
->type
, "IntxCHR", 8);
5172 pdev
->major
= cpu_to_le64(MAJOR(dev
));
5173 pdev
->minor
= cpu_to_le64(MINOR(dev
));
5174 rc
= tcon
->ses
->server
->ops
->sync_write(xid
, &fid
, &io_parms
,
5175 &bytes_written
, iov
, 1);
5176 } else if (S_ISBLK(mode
)) {
5177 memcpy(pdev
->type
, "IntxBLK", 8);
5178 pdev
->major
= cpu_to_le64(MAJOR(dev
));
5179 pdev
->minor
= cpu_to_le64(MINOR(dev
));
5180 rc
= tcon
->ses
->server
->ops
->sync_write(xid
, &fid
, &io_parms
,
5181 &bytes_written
, iov
, 1);
5183 tcon
->ses
->server
->ops
->close(xid
, tcon
, &fid
);
5186 /* FIXME: add code here to set EAs */
5192 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5193 struct smb_version_operations smb20_operations
= {
5194 .compare_fids
= smb2_compare_fids
,
5195 .setup_request
= smb2_setup_request
,
5196 .setup_async_request
= smb2_setup_async_request
,
5197 .check_receive
= smb2_check_receive
,
5198 .add_credits
= smb2_add_credits
,
5199 .set_credits
= smb2_set_credits
,
5200 .get_credits_field
= smb2_get_credits_field
,
5201 .get_credits
= smb2_get_credits
,
5202 .wait_mtu_credits
= cifs_wait_mtu_credits
,
5203 .get_next_mid
= smb2_get_next_mid
,
5204 .revert_current_mid
= smb2_revert_current_mid
,
5205 .read_data_offset
= smb2_read_data_offset
,
5206 .read_data_length
= smb2_read_data_length
,
5207 .map_error
= map_smb2_to_linux_error
,
5208 .find_mid
= smb2_find_mid
,
5209 .check_message
= smb2_check_message
,
5210 .dump_detail
= smb2_dump_detail
,
5211 .clear_stats
= smb2_clear_stats
,
5212 .print_stats
= smb2_print_stats
,
5213 .is_oplock_break
= smb2_is_valid_oplock_break
,
5214 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5215 .downgrade_oplock
= smb2_downgrade_oplock
,
5216 .need_neg
= smb2_need_neg
,
5217 .negotiate
= smb2_negotiate
,
5218 .negotiate_wsize
= smb2_negotiate_wsize
,
5219 .negotiate_rsize
= smb2_negotiate_rsize
,
5220 .sess_setup
= SMB2_sess_setup
,
5221 .logoff
= SMB2_logoff
,
5222 .tree_connect
= SMB2_tcon
,
5223 .tree_disconnect
= SMB2_tdis
,
5224 .qfs_tcon
= smb2_qfs_tcon
,
5225 .is_path_accessible
= smb2_is_path_accessible
,
5226 .can_echo
= smb2_can_echo
,
5228 .query_path_info
= smb2_query_path_info
,
5229 .get_srv_inum
= smb2_get_srv_inum
,
5230 .query_file_info
= smb2_query_file_info
,
5231 .set_path_size
= smb2_set_path_size
,
5232 .set_file_size
= smb2_set_file_size
,
5233 .set_file_info
= smb2_set_file_info
,
5234 .set_compression
= smb2_set_compression
,
5235 .mkdir
= smb2_mkdir
,
5236 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5237 .rmdir
= smb2_rmdir
,
5238 .unlink
= smb2_unlink
,
5239 .rename
= smb2_rename_path
,
5240 .create_hardlink
= smb2_create_hardlink
,
5241 .query_symlink
= smb2_query_symlink
,
5242 .query_mf_symlink
= smb3_query_mf_symlink
,
5243 .create_mf_symlink
= smb3_create_mf_symlink
,
5244 .open
= smb2_open_file
,
5245 .set_fid
= smb2_set_fid
,
5246 .close
= smb2_close_file
,
5247 .flush
= smb2_flush_file
,
5248 .async_readv
= smb2_async_readv
,
5249 .async_writev
= smb2_async_writev
,
5250 .sync_read
= smb2_sync_read
,
5251 .sync_write
= smb2_sync_write
,
5252 .query_dir_first
= smb2_query_dir_first
,
5253 .query_dir_next
= smb2_query_dir_next
,
5254 .close_dir
= smb2_close_dir
,
5255 .calc_smb_size
= smb2_calc_size
,
5256 .is_status_pending
= smb2_is_status_pending
,
5257 .is_session_expired
= smb2_is_session_expired
,
5258 .oplock_response
= smb2_oplock_response
,
5259 .queryfs
= smb2_queryfs
,
5260 .mand_lock
= smb2_mand_lock
,
5261 .mand_unlock_range
= smb2_unlock_range
,
5262 .push_mand_locks
= smb2_push_mandatory_locks
,
5263 .get_lease_key
= smb2_get_lease_key
,
5264 .set_lease_key
= smb2_set_lease_key
,
5265 .new_lease_key
= smb2_new_lease_key
,
5266 .calc_signature
= smb2_calc_signature
,
5267 .is_read_op
= smb2_is_read_op
,
5268 .set_oplock_level
= smb2_set_oplock_level
,
5269 .create_lease_buf
= smb2_create_lease_buf
,
5270 .parse_lease_buf
= smb2_parse_lease_buf
,
5271 .copychunk_range
= smb2_copychunk_range
,
5272 .wp_retry_size
= smb2_wp_retry_size
,
5273 .dir_needs_close
= smb2_dir_needs_close
,
5274 .get_dfs_refer
= smb2_get_dfs_refer
,
5275 .select_sectype
= smb2_select_sectype
,
5276 #ifdef CONFIG_CIFS_XATTR
5277 .query_all_EAs
= smb2_query_eas
,
5278 .set_EA
= smb2_set_ea
,
5279 #endif /* CIFS_XATTR */
5280 .get_acl
= get_smb2_acl
,
5281 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5282 .set_acl
= set_smb2_acl
,
5283 .next_header
= smb2_next_header
,
5284 .ioctl_query_info
= smb2_ioctl_query_info
,
5285 .make_node
= smb2_make_node
,
5286 .fiemap
= smb3_fiemap
,
5287 .llseek
= smb3_llseek
,
5288 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5289 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5291 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5293 struct smb_version_operations smb21_operations
= {
5294 .compare_fids
= smb2_compare_fids
,
5295 .setup_request
= smb2_setup_request
,
5296 .setup_async_request
= smb2_setup_async_request
,
5297 .check_receive
= smb2_check_receive
,
5298 .add_credits
= smb2_add_credits
,
5299 .set_credits
= smb2_set_credits
,
5300 .get_credits_field
= smb2_get_credits_field
,
5301 .get_credits
= smb2_get_credits
,
5302 .wait_mtu_credits
= smb2_wait_mtu_credits
,
5303 .adjust_credits
= smb2_adjust_credits
,
5304 .get_next_mid
= smb2_get_next_mid
,
5305 .revert_current_mid
= smb2_revert_current_mid
,
5306 .read_data_offset
= smb2_read_data_offset
,
5307 .read_data_length
= smb2_read_data_length
,
5308 .map_error
= map_smb2_to_linux_error
,
5309 .find_mid
= smb2_find_mid
,
5310 .check_message
= smb2_check_message
,
5311 .dump_detail
= smb2_dump_detail
,
5312 .clear_stats
= smb2_clear_stats
,
5313 .print_stats
= smb2_print_stats
,
5314 .is_oplock_break
= smb2_is_valid_oplock_break
,
5315 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5316 .downgrade_oplock
= smb2_downgrade_oplock
,
5317 .need_neg
= smb2_need_neg
,
5318 .negotiate
= smb2_negotiate
,
5319 .negotiate_wsize
= smb2_negotiate_wsize
,
5320 .negotiate_rsize
= smb2_negotiate_rsize
,
5321 .sess_setup
= SMB2_sess_setup
,
5322 .logoff
= SMB2_logoff
,
5323 .tree_connect
= SMB2_tcon
,
5324 .tree_disconnect
= SMB2_tdis
,
5325 .qfs_tcon
= smb2_qfs_tcon
,
5326 .is_path_accessible
= smb2_is_path_accessible
,
5327 .can_echo
= smb2_can_echo
,
5329 .query_path_info
= smb2_query_path_info
,
5330 .get_srv_inum
= smb2_get_srv_inum
,
5331 .query_file_info
= smb2_query_file_info
,
5332 .set_path_size
= smb2_set_path_size
,
5333 .set_file_size
= smb2_set_file_size
,
5334 .set_file_info
= smb2_set_file_info
,
5335 .set_compression
= smb2_set_compression
,
5336 .mkdir
= smb2_mkdir
,
5337 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5338 .rmdir
= smb2_rmdir
,
5339 .unlink
= smb2_unlink
,
5340 .rename
= smb2_rename_path
,
5341 .create_hardlink
= smb2_create_hardlink
,
5342 .query_symlink
= smb2_query_symlink
,
5343 .query_mf_symlink
= smb3_query_mf_symlink
,
5344 .create_mf_symlink
= smb3_create_mf_symlink
,
5345 .open
= smb2_open_file
,
5346 .set_fid
= smb2_set_fid
,
5347 .close
= smb2_close_file
,
5348 .flush
= smb2_flush_file
,
5349 .async_readv
= smb2_async_readv
,
5350 .async_writev
= smb2_async_writev
,
5351 .sync_read
= smb2_sync_read
,
5352 .sync_write
= smb2_sync_write
,
5353 .query_dir_first
= smb2_query_dir_first
,
5354 .query_dir_next
= smb2_query_dir_next
,
5355 .close_dir
= smb2_close_dir
,
5356 .calc_smb_size
= smb2_calc_size
,
5357 .is_status_pending
= smb2_is_status_pending
,
5358 .is_session_expired
= smb2_is_session_expired
,
5359 .oplock_response
= smb2_oplock_response
,
5360 .queryfs
= smb2_queryfs
,
5361 .mand_lock
= smb2_mand_lock
,
5362 .mand_unlock_range
= smb2_unlock_range
,
5363 .push_mand_locks
= smb2_push_mandatory_locks
,
5364 .get_lease_key
= smb2_get_lease_key
,
5365 .set_lease_key
= smb2_set_lease_key
,
5366 .new_lease_key
= smb2_new_lease_key
,
5367 .calc_signature
= smb2_calc_signature
,
5368 .is_read_op
= smb21_is_read_op
,
5369 .set_oplock_level
= smb21_set_oplock_level
,
5370 .create_lease_buf
= smb2_create_lease_buf
,
5371 .parse_lease_buf
= smb2_parse_lease_buf
,
5372 .copychunk_range
= smb2_copychunk_range
,
5373 .wp_retry_size
= smb2_wp_retry_size
,
5374 .dir_needs_close
= smb2_dir_needs_close
,
5375 .enum_snapshots
= smb3_enum_snapshots
,
5376 .notify
= smb3_notify
,
5377 .get_dfs_refer
= smb2_get_dfs_refer
,
5378 .select_sectype
= smb2_select_sectype
,
5379 #ifdef CONFIG_CIFS_XATTR
5380 .query_all_EAs
= smb2_query_eas
,
5381 .set_EA
= smb2_set_ea
,
5382 #endif /* CIFS_XATTR */
5383 .get_acl
= get_smb2_acl
,
5384 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5385 .set_acl
= set_smb2_acl
,
5386 .next_header
= smb2_next_header
,
5387 .ioctl_query_info
= smb2_ioctl_query_info
,
5388 .make_node
= smb2_make_node
,
5389 .fiemap
= smb3_fiemap
,
5390 .llseek
= smb3_llseek
,
5391 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5392 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5395 struct smb_version_operations smb30_operations
= {
5396 .compare_fids
= smb2_compare_fids
,
5397 .setup_request
= smb2_setup_request
,
5398 .setup_async_request
= smb2_setup_async_request
,
5399 .check_receive
= smb2_check_receive
,
5400 .add_credits
= smb2_add_credits
,
5401 .set_credits
= smb2_set_credits
,
5402 .get_credits_field
= smb2_get_credits_field
,
5403 .get_credits
= smb2_get_credits
,
5404 .wait_mtu_credits
= smb2_wait_mtu_credits
,
5405 .adjust_credits
= smb2_adjust_credits
,
5406 .get_next_mid
= smb2_get_next_mid
,
5407 .revert_current_mid
= smb2_revert_current_mid
,
5408 .read_data_offset
= smb2_read_data_offset
,
5409 .read_data_length
= smb2_read_data_length
,
5410 .map_error
= map_smb2_to_linux_error
,
5411 .find_mid
= smb2_find_mid
,
5412 .check_message
= smb2_check_message
,
5413 .dump_detail
= smb2_dump_detail
,
5414 .clear_stats
= smb2_clear_stats
,
5415 .print_stats
= smb2_print_stats
,
5416 .dump_share_caps
= smb2_dump_share_caps
,
5417 .is_oplock_break
= smb2_is_valid_oplock_break
,
5418 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5419 .downgrade_oplock
= smb3_downgrade_oplock
,
5420 .need_neg
= smb2_need_neg
,
5421 .negotiate
= smb2_negotiate
,
5422 .negotiate_wsize
= smb3_negotiate_wsize
,
5423 .negotiate_rsize
= smb3_negotiate_rsize
,
5424 .sess_setup
= SMB2_sess_setup
,
5425 .logoff
= SMB2_logoff
,
5426 .tree_connect
= SMB2_tcon
,
5427 .tree_disconnect
= SMB2_tdis
,
5428 .qfs_tcon
= smb3_qfs_tcon
,
5429 .is_path_accessible
= smb2_is_path_accessible
,
5430 .can_echo
= smb2_can_echo
,
5432 .query_path_info
= smb2_query_path_info
,
5433 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5434 .query_reparse_tag
= smb2_query_reparse_tag
,
5435 .get_srv_inum
= smb2_get_srv_inum
,
5436 .query_file_info
= smb2_query_file_info
,
5437 .set_path_size
= smb2_set_path_size
,
5438 .set_file_size
= smb2_set_file_size
,
5439 .set_file_info
= smb2_set_file_info
,
5440 .set_compression
= smb2_set_compression
,
5441 .mkdir
= smb2_mkdir
,
5442 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5443 .rmdir
= smb2_rmdir
,
5444 .unlink
= smb2_unlink
,
5445 .rename
= smb2_rename_path
,
5446 .create_hardlink
= smb2_create_hardlink
,
5447 .query_symlink
= smb2_query_symlink
,
5448 .query_mf_symlink
= smb3_query_mf_symlink
,
5449 .create_mf_symlink
= smb3_create_mf_symlink
,
5450 .open
= smb2_open_file
,
5451 .set_fid
= smb2_set_fid
,
5452 .close
= smb2_close_file
,
5453 .close_getattr
= smb2_close_getattr
,
5454 .flush
= smb2_flush_file
,
5455 .async_readv
= smb2_async_readv
,
5456 .async_writev
= smb2_async_writev
,
5457 .sync_read
= smb2_sync_read
,
5458 .sync_write
= smb2_sync_write
,
5459 .query_dir_first
= smb2_query_dir_first
,
5460 .query_dir_next
= smb2_query_dir_next
,
5461 .close_dir
= smb2_close_dir
,
5462 .calc_smb_size
= smb2_calc_size
,
5463 .is_status_pending
= smb2_is_status_pending
,
5464 .is_session_expired
= smb2_is_session_expired
,
5465 .oplock_response
= smb2_oplock_response
,
5466 .queryfs
= smb2_queryfs
,
5467 .mand_lock
= smb2_mand_lock
,
5468 .mand_unlock_range
= smb2_unlock_range
,
5469 .push_mand_locks
= smb2_push_mandatory_locks
,
5470 .get_lease_key
= smb2_get_lease_key
,
5471 .set_lease_key
= smb2_set_lease_key
,
5472 .new_lease_key
= smb2_new_lease_key
,
5473 .generate_signingkey
= generate_smb30signingkey
,
5474 .calc_signature
= smb3_calc_signature
,
5475 .set_integrity
= smb3_set_integrity
,
5476 .is_read_op
= smb21_is_read_op
,
5477 .set_oplock_level
= smb3_set_oplock_level
,
5478 .create_lease_buf
= smb3_create_lease_buf
,
5479 .parse_lease_buf
= smb3_parse_lease_buf
,
5480 .copychunk_range
= smb2_copychunk_range
,
5481 .duplicate_extents
= smb2_duplicate_extents
,
5482 .validate_negotiate
= smb3_validate_negotiate
,
5483 .wp_retry_size
= smb2_wp_retry_size
,
5484 .dir_needs_close
= smb2_dir_needs_close
,
5485 .fallocate
= smb3_fallocate
,
5486 .enum_snapshots
= smb3_enum_snapshots
,
5487 .notify
= smb3_notify
,
5488 .init_transform_rq
= smb3_init_transform_rq
,
5489 .is_transform_hdr
= smb3_is_transform_hdr
,
5490 .receive_transform
= smb3_receive_transform
,
5491 .get_dfs_refer
= smb2_get_dfs_refer
,
5492 .select_sectype
= smb2_select_sectype
,
5493 #ifdef CONFIG_CIFS_XATTR
5494 .query_all_EAs
= smb2_query_eas
,
5495 .set_EA
= smb2_set_ea
,
5496 #endif /* CIFS_XATTR */
5497 .get_acl
= get_smb2_acl
,
5498 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5499 .set_acl
= set_smb2_acl
,
5500 .next_header
= smb2_next_header
,
5501 .ioctl_query_info
= smb2_ioctl_query_info
,
5502 .make_node
= smb2_make_node
,
5503 .fiemap
= smb3_fiemap
,
5504 .llseek
= smb3_llseek
,
5505 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5506 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5509 struct smb_version_operations smb311_operations
= {
5510 .compare_fids
= smb2_compare_fids
,
5511 .setup_request
= smb2_setup_request
,
5512 .setup_async_request
= smb2_setup_async_request
,
5513 .check_receive
= smb2_check_receive
,
5514 .add_credits
= smb2_add_credits
,
5515 .set_credits
= smb2_set_credits
,
5516 .get_credits_field
= smb2_get_credits_field
,
5517 .get_credits
= smb2_get_credits
,
5518 .wait_mtu_credits
= smb2_wait_mtu_credits
,
5519 .adjust_credits
= smb2_adjust_credits
,
5520 .get_next_mid
= smb2_get_next_mid
,
5521 .revert_current_mid
= smb2_revert_current_mid
,
5522 .read_data_offset
= smb2_read_data_offset
,
5523 .read_data_length
= smb2_read_data_length
,
5524 .map_error
= map_smb2_to_linux_error
,
5525 .find_mid
= smb2_find_mid
,
5526 .check_message
= smb2_check_message
,
5527 .dump_detail
= smb2_dump_detail
,
5528 .clear_stats
= smb2_clear_stats
,
5529 .print_stats
= smb2_print_stats
,
5530 .dump_share_caps
= smb2_dump_share_caps
,
5531 .is_oplock_break
= smb2_is_valid_oplock_break
,
5532 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
5533 .downgrade_oplock
= smb3_downgrade_oplock
,
5534 .need_neg
= smb2_need_neg
,
5535 .negotiate
= smb2_negotiate
,
5536 .negotiate_wsize
= smb3_negotiate_wsize
,
5537 .negotiate_rsize
= smb3_negotiate_rsize
,
5538 .sess_setup
= SMB2_sess_setup
,
5539 .logoff
= SMB2_logoff
,
5540 .tree_connect
= SMB2_tcon
,
5541 .tree_disconnect
= SMB2_tdis
,
5542 .qfs_tcon
= smb3_qfs_tcon
,
5543 .is_path_accessible
= smb2_is_path_accessible
,
5544 .can_echo
= smb2_can_echo
,
5546 .query_path_info
= smb2_query_path_info
,
5547 .query_reparse_tag
= smb2_query_reparse_tag
,
5548 .get_srv_inum
= smb2_get_srv_inum
,
5549 .query_file_info
= smb2_query_file_info
,
5550 .set_path_size
= smb2_set_path_size
,
5551 .set_file_size
= smb2_set_file_size
,
5552 .set_file_info
= smb2_set_file_info
,
5553 .set_compression
= smb2_set_compression
,
5554 .mkdir
= smb2_mkdir
,
5555 .mkdir_setinfo
= smb2_mkdir_setinfo
,
5556 .posix_mkdir
= smb311_posix_mkdir
,
5557 .rmdir
= smb2_rmdir
,
5558 .unlink
= smb2_unlink
,
5559 .rename
= smb2_rename_path
,
5560 .create_hardlink
= smb2_create_hardlink
,
5561 .query_symlink
= smb2_query_symlink
,
5562 .query_mf_symlink
= smb3_query_mf_symlink
,
5563 .create_mf_symlink
= smb3_create_mf_symlink
,
5564 .open
= smb2_open_file
,
5565 .set_fid
= smb2_set_fid
,
5566 .close
= smb2_close_file
,
5567 .close_getattr
= smb2_close_getattr
,
5568 .flush
= smb2_flush_file
,
5569 .async_readv
= smb2_async_readv
,
5570 .async_writev
= smb2_async_writev
,
5571 .sync_read
= smb2_sync_read
,
5572 .sync_write
= smb2_sync_write
,
5573 .query_dir_first
= smb2_query_dir_first
,
5574 .query_dir_next
= smb2_query_dir_next
,
5575 .close_dir
= smb2_close_dir
,
5576 .calc_smb_size
= smb2_calc_size
,
5577 .is_status_pending
= smb2_is_status_pending
,
5578 .is_session_expired
= smb2_is_session_expired
,
5579 .oplock_response
= smb2_oplock_response
,
5580 .queryfs
= smb311_queryfs
,
5581 .mand_lock
= smb2_mand_lock
,
5582 .mand_unlock_range
= smb2_unlock_range
,
5583 .push_mand_locks
= smb2_push_mandatory_locks
,
5584 .get_lease_key
= smb2_get_lease_key
,
5585 .set_lease_key
= smb2_set_lease_key
,
5586 .new_lease_key
= smb2_new_lease_key
,
5587 .generate_signingkey
= generate_smb311signingkey
,
5588 .calc_signature
= smb3_calc_signature
,
5589 .set_integrity
= smb3_set_integrity
,
5590 .is_read_op
= smb21_is_read_op
,
5591 .set_oplock_level
= smb3_set_oplock_level
,
5592 .create_lease_buf
= smb3_create_lease_buf
,
5593 .parse_lease_buf
= smb3_parse_lease_buf
,
5594 .copychunk_range
= smb2_copychunk_range
,
5595 .duplicate_extents
= smb2_duplicate_extents
,
5596 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5597 .wp_retry_size
= smb2_wp_retry_size
,
5598 .dir_needs_close
= smb2_dir_needs_close
,
5599 .fallocate
= smb3_fallocate
,
5600 .enum_snapshots
= smb3_enum_snapshots
,
5601 .notify
= smb3_notify
,
5602 .init_transform_rq
= smb3_init_transform_rq
,
5603 .is_transform_hdr
= smb3_is_transform_hdr
,
5604 .receive_transform
= smb3_receive_transform
,
5605 .get_dfs_refer
= smb2_get_dfs_refer
,
5606 .select_sectype
= smb2_select_sectype
,
5607 #ifdef CONFIG_CIFS_XATTR
5608 .query_all_EAs
= smb2_query_eas
,
5609 .set_EA
= smb2_set_ea
,
5610 #endif /* CIFS_XATTR */
5611 .get_acl
= get_smb2_acl
,
5612 .get_acl_by_fid
= get_smb2_acl_by_fid
,
5613 .set_acl
= set_smb2_acl
,
5614 .next_header
= smb2_next_header
,
5615 .ioctl_query_info
= smb2_ioctl_query_info
,
5616 .make_node
= smb2_make_node
,
5617 .fiemap
= smb3_fiemap
,
5618 .llseek
= smb3_llseek
,
5619 .is_status_io_timeout
= smb2_is_status_io_timeout
,
5620 .is_network_name_deleted
= smb2_is_network_name_deleted
,
5623 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5624 struct smb_version_values smb20_values
= {
5625 .version_string
= SMB20_VERSION_STRING
,
5626 .protocol_id
= SMB20_PROT_ID
,
5627 .req_capabilities
= 0, /* MBZ */
5628 .large_lock_type
= 0,
5629 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5630 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5631 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5632 .header_size
= sizeof(struct smb2_hdr
),
5633 .header_preamble_size
= 0,
5634 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5635 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
5636 .lock_cmd
= SMB2_LOCK
,
5638 .cap_nt_find
= SMB2_NT_FIND
,
5639 .cap_large_files
= SMB2_LARGE_FILES
,
5640 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5641 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5642 .create_lease_size
= sizeof(struct create_lease
),
5644 #endif /* ALLOW_INSECURE_LEGACY */
5646 struct smb_version_values smb21_values
= {
5647 .version_string
= SMB21_VERSION_STRING
,
5648 .protocol_id
= SMB21_PROT_ID
,
5649 .req_capabilities
= 0, /* MBZ on negotiate req until SMB3 dialect */
5650 .large_lock_type
= 0,
5651 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5652 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5653 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5654 .header_size
= sizeof(struct smb2_hdr
),
5655 .header_preamble_size
= 0,
5656 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5657 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
5658 .lock_cmd
= SMB2_LOCK
,
5660 .cap_nt_find
= SMB2_NT_FIND
,
5661 .cap_large_files
= SMB2_LARGE_FILES
,
5662 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5663 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5664 .create_lease_size
= sizeof(struct create_lease
),
5667 struct smb_version_values smb3any_values
= {
5668 .version_string
= SMB3ANY_VERSION_STRING
,
5669 .protocol_id
= SMB302_PROT_ID
, /* doesn't matter, send protocol array */
5670 .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
,
5671 .large_lock_type
= 0,
5672 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5673 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5674 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5675 .header_size
= sizeof(struct smb2_hdr
),
5676 .header_preamble_size
= 0,
5677 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5678 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
5679 .lock_cmd
= SMB2_LOCK
,
5681 .cap_nt_find
= SMB2_NT_FIND
,
5682 .cap_large_files
= SMB2_LARGE_FILES
,
5683 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5684 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5685 .create_lease_size
= sizeof(struct create_lease_v2
),
5688 struct smb_version_values smbdefault_values
= {
5689 .version_string
= SMBDEFAULT_VERSION_STRING
,
5690 .protocol_id
= SMB302_PROT_ID
, /* doesn't matter, send protocol array */
5691 .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
,
5692 .large_lock_type
= 0,
5693 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5694 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5695 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5696 .header_size
= sizeof(struct smb2_hdr
),
5697 .header_preamble_size
= 0,
5698 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5699 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
5700 .lock_cmd
= SMB2_LOCK
,
5702 .cap_nt_find
= SMB2_NT_FIND
,
5703 .cap_large_files
= SMB2_LARGE_FILES
,
5704 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5705 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5706 .create_lease_size
= sizeof(struct create_lease_v2
),
5709 struct smb_version_values smb30_values
= {
5710 .version_string
= SMB30_VERSION_STRING
,
5711 .protocol_id
= SMB30_PROT_ID
,
5712 .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
,
5713 .large_lock_type
= 0,
5714 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5715 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5716 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5717 .header_size
= sizeof(struct smb2_hdr
),
5718 .header_preamble_size
= 0,
5719 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5720 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
5721 .lock_cmd
= SMB2_LOCK
,
5723 .cap_nt_find
= SMB2_NT_FIND
,
5724 .cap_large_files
= SMB2_LARGE_FILES
,
5725 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5726 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5727 .create_lease_size
= sizeof(struct create_lease_v2
),
5730 struct smb_version_values smb302_values
= {
5731 .version_string
= SMB302_VERSION_STRING
,
5732 .protocol_id
= SMB302_PROT_ID
,
5733 .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
,
5734 .large_lock_type
= 0,
5735 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5736 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5737 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5738 .header_size
= sizeof(struct smb2_hdr
),
5739 .header_preamble_size
= 0,
5740 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5741 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
5742 .lock_cmd
= SMB2_LOCK
,
5744 .cap_nt_find
= SMB2_NT_FIND
,
5745 .cap_large_files
= SMB2_LARGE_FILES
,
5746 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5747 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5748 .create_lease_size
= sizeof(struct create_lease_v2
),
5751 struct smb_version_values smb311_values
= {
5752 .version_string
= SMB311_VERSION_STRING
,
5753 .protocol_id
= SMB311_PROT_ID
,
5754 .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
,
5755 .large_lock_type
= 0,
5756 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE
,
5757 .shared_lock_type
= SMB2_LOCKFLAG_SHARED
,
5758 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
5759 .header_size
= sizeof(struct smb2_hdr
),
5760 .header_preamble_size
= 0,
5761 .max_header_size
= MAX_SMB2_HDR_SIZE
,
5762 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
5763 .lock_cmd
= SMB2_LOCK
,
5765 .cap_nt_find
= SMB2_NT_FIND
,
5766 .cap_large_files
= SMB2_LARGE_FILES
,
5767 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5768 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
5769 .create_lease_size
= sizeof(struct create_lease_v2
),