2 * SMB2 version specific operations
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
22 #include <linux/falloc.h>
23 #include <linux/scatterlist.h>
24 #include <linux/uuid.h>
25 #include <crypto/aead.h>
28 #include "smb2proto.h"
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_unicode.h"
32 #include "smb2status.h"
34 #include "cifs_ioctl.h"
37 change_conf(struct TCP_Server_Info
*server
)
39 server
->credits
+= server
->echo_credits
+ server
->oplock_credits
;
40 server
->oplock_credits
= server
->echo_credits
= 0;
41 switch (server
->credits
) {
45 server
->echoes
= false;
46 server
->oplocks
= false;
47 cifs_dbg(VFS
, "disabling echoes and oplocks\n");
50 server
->echoes
= true;
51 server
->oplocks
= false;
52 server
->echo_credits
= 1;
53 cifs_dbg(FYI
, "disabling oplocks\n");
56 server
->echoes
= true;
58 server
->oplocks
= true;
59 server
->oplock_credits
= 1;
61 server
->oplocks
= false;
63 server
->echo_credits
= 1;
65 server
->credits
-= server
->echo_credits
+ server
->oplock_credits
;
70 smb2_add_credits(struct TCP_Server_Info
*server
, const unsigned int add
,
74 spin_lock(&server
->req_lock
);
75 val
= server
->ops
->get_credits_field(server
, optype
);
78 *val
= 65000; /* Don't get near 64K credits, avoid srv bugs */
79 printk_once(KERN_WARNING
"server overflowed SMB3 credits\n");
82 if (server
->in_flight
== 0 && (optype
& CIFS_OP_MASK
) != CIFS_NEG_OP
)
83 rc
= change_conf(server
);
85 * Sometimes server returns 0 credits on oplock break ack - we need to
86 * rebalance credits in this case.
88 else if (server
->in_flight
> 0 && server
->oplock_credits
== 0 &&
90 if (server
->credits
> 1) {
92 server
->oplock_credits
++;
95 spin_unlock(&server
->req_lock
);
96 wake_up(&server
->request_q
);
98 cifs_reconnect(server
);
102 smb2_set_credits(struct TCP_Server_Info
*server
, const int val
)
104 spin_lock(&server
->req_lock
);
105 server
->credits
= val
;
106 spin_unlock(&server
->req_lock
);
110 smb2_get_credits_field(struct TCP_Server_Info
*server
, const int optype
)
114 return &server
->echo_credits
;
116 return &server
->oplock_credits
;
118 return &server
->credits
;
123 smb2_get_credits(struct mid_q_entry
*mid
)
125 struct smb2_sync_hdr
*shdr
= get_sync_hdr(mid
->resp_buf
);
127 return le16_to_cpu(shdr
->CreditRequest
);
131 smb2_wait_mtu_credits(struct TCP_Server_Info
*server
, unsigned int size
,
132 unsigned int *num
, unsigned int *credits
)
135 unsigned int scredits
;
137 spin_lock(&server
->req_lock
);
139 if (server
->credits
<= 0) {
140 spin_unlock(&server
->req_lock
);
141 cifs_num_waiters_inc(server
);
142 rc
= wait_event_killable(server
->request_q
,
143 has_credits(server
, &server
->credits
));
144 cifs_num_waiters_dec(server
);
147 spin_lock(&server
->req_lock
);
149 if (server
->tcpStatus
== CifsExiting
) {
150 spin_unlock(&server
->req_lock
);
154 scredits
= server
->credits
;
155 /* can deadlock with reopen */
157 *num
= SMB2_MAX_BUFFER_SIZE
;
162 /* leave one credit for a possible reopen */
164 *num
= min_t(unsigned int, size
,
165 scredits
* SMB2_MAX_BUFFER_SIZE
);
167 *credits
= DIV_ROUND_UP(*num
, SMB2_MAX_BUFFER_SIZE
);
168 server
->credits
-= *credits
;
173 spin_unlock(&server
->req_lock
);
178 smb2_get_next_mid(struct TCP_Server_Info
*server
)
181 /* for SMB2 we need the current value */
182 spin_lock(&GlobalMid_Lock
);
183 mid
= server
->CurrentMid
++;
184 spin_unlock(&GlobalMid_Lock
);
188 static struct mid_q_entry
*
189 smb2_find_mid(struct TCP_Server_Info
*server
, char *buf
)
191 struct mid_q_entry
*mid
;
192 struct smb2_sync_hdr
*shdr
= get_sync_hdr(buf
);
193 __u64 wire_mid
= le64_to_cpu(shdr
->MessageId
);
195 if (shdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
) {
196 cifs_dbg(VFS
, "encrypted frame parsing not supported yet");
200 spin_lock(&GlobalMid_Lock
);
201 list_for_each_entry(mid
, &server
->pending_mid_q
, qhead
) {
202 if ((mid
->mid
== wire_mid
) &&
203 (mid
->mid_state
== MID_REQUEST_SUBMITTED
) &&
204 (mid
->command
== shdr
->Command
)) {
205 spin_unlock(&GlobalMid_Lock
);
209 spin_unlock(&GlobalMid_Lock
);
214 smb2_dump_detail(void *buf
)
216 #ifdef CONFIG_CIFS_DEBUG2
217 struct smb2_sync_hdr
*shdr
= get_sync_hdr(buf
);
219 cifs_dbg(VFS
, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
220 shdr
->Command
, shdr
->Status
, shdr
->Flags
, shdr
->MessageId
,
222 cifs_dbg(VFS
, "smb buf %p len %u\n", buf
, smb2_calc_size(buf
));
227 smb2_need_neg(struct TCP_Server_Info
*server
)
229 return server
->max_read
== 0;
233 smb2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
236 ses
->server
->CurrentMid
= 0;
237 rc
= SMB2_negotiate(xid
, ses
);
238 /* BB we probably don't need to retry with modern servers */
245 smb2_negotiate_wsize(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
247 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
250 /* start with specified wsize, or default */
251 wsize
= volume_info
->wsize
? volume_info
->wsize
: CIFS_DEFAULT_IOSIZE
;
252 wsize
= min_t(unsigned int, wsize
, server
->max_write
);
254 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
255 wsize
= min_t(unsigned int, wsize
, SMB2_MAX_BUFFER_SIZE
);
261 smb2_negotiate_rsize(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
263 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
266 /* start with specified rsize, or default */
267 rsize
= volume_info
->rsize
? volume_info
->rsize
: CIFS_DEFAULT_IOSIZE
;
268 rsize
= min_t(unsigned int, rsize
, server
->max_read
);
270 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
271 rsize
= min_t(unsigned int, rsize
, SMB2_MAX_BUFFER_SIZE
);
276 #ifdef CONFIG_CIFS_STATS2
278 SMB3_request_interfaces(const unsigned int xid
, struct cifs_tcon
*tcon
)
281 unsigned int ret_data_len
= 0;
282 struct network_interface_info_ioctl_rsp
*out_buf
;
284 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
285 FSCTL_QUERY_NETWORK_INTERFACE_INFO
, true /* is_fsctl */,
287 NULL
/* no data input */, 0 /* no data input */,
288 (char **)&out_buf
, &ret_data_len
);
290 cifs_dbg(VFS
, "error %d on ioctl to get interface list\n", rc
);
291 else if (ret_data_len
< sizeof(struct network_interface_info_ioctl_rsp
)) {
292 cifs_dbg(VFS
, "server returned bad net interface info buf\n");
295 /* Dump info on first interface */
296 cifs_dbg(FYI
, "Adapter Capability 0x%x\t",
297 le32_to_cpu(out_buf
->Capability
));
298 cifs_dbg(FYI
, "Link Speed %lld\n",
299 le64_to_cpu(out_buf
->LinkSpeed
));
307 smb3_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
)
310 __le16 srch_path
= 0; /* Null - open root of share */
311 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
312 struct cifs_open_parms oparms
;
316 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
317 oparms
.disposition
= FILE_OPEN
;
318 oparms
.create_options
= 0;
320 oparms
.reconnect
= false;
322 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
);
326 #ifdef CONFIG_CIFS_STATS2
327 SMB3_request_interfaces(xid
, tcon
);
330 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
331 FS_ATTRIBUTE_INFORMATION
);
332 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
333 FS_DEVICE_INFORMATION
);
334 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
335 FS_SECTOR_SIZE_INFORMATION
); /* SMB3 specific */
336 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
341 smb2_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
)
344 __le16 srch_path
= 0; /* Null - open root of share */
345 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
346 struct cifs_open_parms oparms
;
350 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
351 oparms
.disposition
= FILE_OPEN
;
352 oparms
.create_options
= 0;
354 oparms
.reconnect
= false;
356 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
);
360 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
361 FS_ATTRIBUTE_INFORMATION
);
362 SMB2_QFS_attr(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
363 FS_DEVICE_INFORMATION
);
364 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
369 smb2_is_path_accessible(const unsigned int xid
, struct cifs_tcon
*tcon
,
370 struct cifs_sb_info
*cifs_sb
, const char *full_path
)
374 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
375 struct cifs_open_parms oparms
;
378 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
383 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
384 oparms
.disposition
= FILE_OPEN
;
385 oparms
.create_options
= 0;
387 oparms
.reconnect
= false;
389 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
);
395 rc
= SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
401 smb2_get_srv_inum(const unsigned int xid
, struct cifs_tcon
*tcon
,
402 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
403 u64
*uniqueid
, FILE_ALL_INFO
*data
)
405 *uniqueid
= le64_to_cpu(data
->IndexNumber
);
410 smb2_query_file_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
411 struct cifs_fid
*fid
, FILE_ALL_INFO
*data
)
414 struct smb2_file_all_info
*smb2_data
;
416 smb2_data
= kzalloc(sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
418 if (smb2_data
== NULL
)
421 rc
= SMB2_query_info(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
,
424 move_smb2_info_to_cifs(data
, smb2_data
);
430 smb2_can_echo(struct TCP_Server_Info
*server
)
432 return server
->echoes
;
436 smb2_clear_stats(struct cifs_tcon
*tcon
)
438 #ifdef CONFIG_CIFS_STATS
440 for (i
= 0; i
< NUMBER_OF_SMB2_COMMANDS
; i
++) {
441 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_sent
[i
], 0);
442 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_failed
[i
], 0);
448 smb2_dump_share_caps(struct seq_file
*m
, struct cifs_tcon
*tcon
)
450 seq_puts(m
, "\n\tShare Capabilities:");
451 if (tcon
->capabilities
& SMB2_SHARE_CAP_DFS
)
452 seq_puts(m
, " DFS,");
453 if (tcon
->capabilities
& SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
)
454 seq_puts(m
, " CONTINUOUS AVAILABILITY,");
455 if (tcon
->capabilities
& SMB2_SHARE_CAP_SCALEOUT
)
456 seq_puts(m
, " SCALEOUT,");
457 if (tcon
->capabilities
& SMB2_SHARE_CAP_CLUSTER
)
458 seq_puts(m
, " CLUSTER,");
459 if (tcon
->capabilities
& SMB2_SHARE_CAP_ASYMMETRIC
)
460 seq_puts(m
, " ASYMMETRIC,");
461 if (tcon
->capabilities
== 0)
462 seq_puts(m
, " None");
463 if (tcon
->ss_flags
& SSINFO_FLAGS_ALIGNED_DEVICE
)
464 seq_puts(m
, " Aligned,");
465 if (tcon
->ss_flags
& SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE
)
466 seq_puts(m
, " Partition Aligned,");
467 if (tcon
->ss_flags
& SSINFO_FLAGS_NO_SEEK_PENALTY
)
468 seq_puts(m
, " SSD,");
469 if (tcon
->ss_flags
& SSINFO_FLAGS_TRIM_ENABLED
)
470 seq_puts(m
, " TRIM-support,");
472 seq_printf(m
, "\tShare Flags: 0x%x", tcon
->share_flags
);
473 if (tcon
->perf_sector_size
)
474 seq_printf(m
, "\tOptimal sector size: 0x%x",
475 tcon
->perf_sector_size
);
479 smb2_print_stats(struct seq_file
*m
, struct cifs_tcon
*tcon
)
481 #ifdef CONFIG_CIFS_STATS
482 atomic_t
*sent
= tcon
->stats
.smb2_stats
.smb2_com_sent
;
483 atomic_t
*failed
= tcon
->stats
.smb2_stats
.smb2_com_failed
;
484 seq_printf(m
, "\nNegotiates: %d sent %d failed",
485 atomic_read(&sent
[SMB2_NEGOTIATE_HE
]),
486 atomic_read(&failed
[SMB2_NEGOTIATE_HE
]));
487 seq_printf(m
, "\nSessionSetups: %d sent %d failed",
488 atomic_read(&sent
[SMB2_SESSION_SETUP_HE
]),
489 atomic_read(&failed
[SMB2_SESSION_SETUP_HE
]));
490 seq_printf(m
, "\nLogoffs: %d sent %d failed",
491 atomic_read(&sent
[SMB2_LOGOFF_HE
]),
492 atomic_read(&failed
[SMB2_LOGOFF_HE
]));
493 seq_printf(m
, "\nTreeConnects: %d sent %d failed",
494 atomic_read(&sent
[SMB2_TREE_CONNECT_HE
]),
495 atomic_read(&failed
[SMB2_TREE_CONNECT_HE
]));
496 seq_printf(m
, "\nTreeDisconnects: %d sent %d failed",
497 atomic_read(&sent
[SMB2_TREE_DISCONNECT_HE
]),
498 atomic_read(&failed
[SMB2_TREE_DISCONNECT_HE
]));
499 seq_printf(m
, "\nCreates: %d sent %d failed",
500 atomic_read(&sent
[SMB2_CREATE_HE
]),
501 atomic_read(&failed
[SMB2_CREATE_HE
]));
502 seq_printf(m
, "\nCloses: %d sent %d failed",
503 atomic_read(&sent
[SMB2_CLOSE_HE
]),
504 atomic_read(&failed
[SMB2_CLOSE_HE
]));
505 seq_printf(m
, "\nFlushes: %d sent %d failed",
506 atomic_read(&sent
[SMB2_FLUSH_HE
]),
507 atomic_read(&failed
[SMB2_FLUSH_HE
]));
508 seq_printf(m
, "\nReads: %d sent %d failed",
509 atomic_read(&sent
[SMB2_READ_HE
]),
510 atomic_read(&failed
[SMB2_READ_HE
]));
511 seq_printf(m
, "\nWrites: %d sent %d failed",
512 atomic_read(&sent
[SMB2_WRITE_HE
]),
513 atomic_read(&failed
[SMB2_WRITE_HE
]));
514 seq_printf(m
, "\nLocks: %d sent %d failed",
515 atomic_read(&sent
[SMB2_LOCK_HE
]),
516 atomic_read(&failed
[SMB2_LOCK_HE
]));
517 seq_printf(m
, "\nIOCTLs: %d sent %d failed",
518 atomic_read(&sent
[SMB2_IOCTL_HE
]),
519 atomic_read(&failed
[SMB2_IOCTL_HE
]));
520 seq_printf(m
, "\nCancels: %d sent %d failed",
521 atomic_read(&sent
[SMB2_CANCEL_HE
]),
522 atomic_read(&failed
[SMB2_CANCEL_HE
]));
523 seq_printf(m
, "\nEchos: %d sent %d failed",
524 atomic_read(&sent
[SMB2_ECHO_HE
]),
525 atomic_read(&failed
[SMB2_ECHO_HE
]));
526 seq_printf(m
, "\nQueryDirectories: %d sent %d failed",
527 atomic_read(&sent
[SMB2_QUERY_DIRECTORY_HE
]),
528 atomic_read(&failed
[SMB2_QUERY_DIRECTORY_HE
]));
529 seq_printf(m
, "\nChangeNotifies: %d sent %d failed",
530 atomic_read(&sent
[SMB2_CHANGE_NOTIFY_HE
]),
531 atomic_read(&failed
[SMB2_CHANGE_NOTIFY_HE
]));
532 seq_printf(m
, "\nQueryInfos: %d sent %d failed",
533 atomic_read(&sent
[SMB2_QUERY_INFO_HE
]),
534 atomic_read(&failed
[SMB2_QUERY_INFO_HE
]));
535 seq_printf(m
, "\nSetInfos: %d sent %d failed",
536 atomic_read(&sent
[SMB2_SET_INFO_HE
]),
537 atomic_read(&failed
[SMB2_SET_INFO_HE
]));
538 seq_printf(m
, "\nOplockBreaks: %d sent %d failed",
539 atomic_read(&sent
[SMB2_OPLOCK_BREAK_HE
]),
540 atomic_read(&failed
[SMB2_OPLOCK_BREAK_HE
]));
545 smb2_set_fid(struct cifsFileInfo
*cfile
, struct cifs_fid
*fid
, __u32 oplock
)
547 struct cifsInodeInfo
*cinode
= CIFS_I(d_inode(cfile
->dentry
));
548 struct TCP_Server_Info
*server
= tlink_tcon(cfile
->tlink
)->ses
->server
;
550 cfile
->fid
.persistent_fid
= fid
->persistent_fid
;
551 cfile
->fid
.volatile_fid
= fid
->volatile_fid
;
552 server
->ops
->set_oplock_level(cinode
, oplock
, fid
->epoch
,
554 cinode
->can_cache_brlcks
= CIFS_CACHE_WRITE(cinode
);
555 memcpy(cfile
->fid
.create_guid
, fid
->create_guid
, 16);
559 smb2_close_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
560 struct cifs_fid
*fid
)
562 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
566 SMB2_request_res_key(const unsigned int xid
, struct cifs_tcon
*tcon
,
567 u64 persistent_fid
, u64 volatile_fid
,
568 struct copychunk_ioctl
*pcchunk
)
571 unsigned int ret_data_len
;
572 struct resume_key_req
*res_key
;
574 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
575 FSCTL_SRV_REQUEST_RESUME_KEY
, true /* is_fsctl */,
577 NULL
, 0 /* no input */,
578 (char **)&res_key
, &ret_data_len
);
581 cifs_dbg(VFS
, "refcpy ioctl error %d getting resume key\n", rc
);
582 goto req_res_key_exit
;
584 if (ret_data_len
< sizeof(struct resume_key_req
)) {
585 cifs_dbg(VFS
, "Invalid refcopy resume key length\n");
587 goto req_res_key_exit
;
589 memcpy(pcchunk
->SourceKey
, res_key
->ResumeKey
, COPY_CHUNK_RES_KEY_SIZE
);
597 smb2_copychunk_range(const unsigned int xid
,
598 struct cifsFileInfo
*srcfile
,
599 struct cifsFileInfo
*trgtfile
, u64 src_off
,
600 u64 len
, u64 dest_off
)
603 unsigned int ret_data_len
;
604 struct copychunk_ioctl
*pcchunk
;
605 struct copychunk_ioctl_rsp
*retbuf
= NULL
;
606 struct cifs_tcon
*tcon
;
607 int chunks_copied
= 0;
608 bool chunk_sizes_updated
= false;
609 ssize_t bytes_written
, total_bytes_written
= 0;
611 pcchunk
= kmalloc(sizeof(struct copychunk_ioctl
), GFP_KERNEL
);
616 cifs_dbg(FYI
, "in smb2_copychunk_range - about to call request res key\n");
617 /* Request a key from the server to identify the source of the copy */
618 rc
= SMB2_request_res_key(xid
, tlink_tcon(srcfile
->tlink
),
619 srcfile
->fid
.persistent_fid
,
620 srcfile
->fid
.volatile_fid
, pcchunk
);
622 /* Note: request_res_key sets res_key null only if rc !=0 */
626 /* For now array only one chunk long, will make more flexible later */
627 pcchunk
->ChunkCount
= cpu_to_le32(1);
628 pcchunk
->Reserved
= 0;
629 pcchunk
->Reserved2
= 0;
631 tcon
= tlink_tcon(trgtfile
->tlink
);
634 pcchunk
->SourceOffset
= cpu_to_le64(src_off
);
635 pcchunk
->TargetOffset
= cpu_to_le64(dest_off
);
637 cpu_to_le32(min_t(u32
, len
, tcon
->max_bytes_chunk
));
639 /* Request server copy to target from src identified by key */
640 rc
= SMB2_ioctl(xid
, tcon
, trgtfile
->fid
.persistent_fid
,
641 trgtfile
->fid
.volatile_fid
, FSCTL_SRV_COPYCHUNK_WRITE
,
642 true /* is_fsctl */, false /* use_ipc */,
644 sizeof(struct copychunk_ioctl
), (char **)&retbuf
,
648 sizeof(struct copychunk_ioctl_rsp
)) {
649 cifs_dbg(VFS
, "invalid cchunk response size\n");
653 if (retbuf
->TotalBytesWritten
== 0) {
654 cifs_dbg(FYI
, "no bytes copied\n");
659 * Check if server claimed to write more than we asked
661 if (le32_to_cpu(retbuf
->TotalBytesWritten
) >
662 le32_to_cpu(pcchunk
->Length
)) {
663 cifs_dbg(VFS
, "invalid copy chunk response\n");
667 if (le32_to_cpu(retbuf
->ChunksWritten
) != 1) {
668 cifs_dbg(VFS
, "invalid num chunks written\n");
674 bytes_written
= le32_to_cpu(retbuf
->TotalBytesWritten
);
675 src_off
+= bytes_written
;
676 dest_off
+= bytes_written
;
677 len
-= bytes_written
;
678 total_bytes_written
+= bytes_written
;
680 cifs_dbg(FYI
, "Chunks %d PartialChunk %d Total %zu\n",
681 le32_to_cpu(retbuf
->ChunksWritten
),
682 le32_to_cpu(retbuf
->ChunkBytesWritten
),
684 } else if (rc
== -EINVAL
) {
685 if (ret_data_len
!= sizeof(struct copychunk_ioctl_rsp
))
688 cifs_dbg(FYI
, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
689 le32_to_cpu(retbuf
->ChunksWritten
),
690 le32_to_cpu(retbuf
->ChunkBytesWritten
),
691 le32_to_cpu(retbuf
->TotalBytesWritten
));
694 * Check if this is the first request using these sizes,
695 * (ie check if copy succeed once with original sizes
696 * and check if the server gave us different sizes after
697 * we already updated max sizes on previous request).
698 * if not then why is the server returning an error now
700 if ((chunks_copied
!= 0) || chunk_sizes_updated
)
703 /* Check that server is not asking us to grow size */
704 if (le32_to_cpu(retbuf
->ChunkBytesWritten
) <
705 tcon
->max_bytes_chunk
)
706 tcon
->max_bytes_chunk
=
707 le32_to_cpu(retbuf
->ChunkBytesWritten
);
709 goto cchunk_out
; /* server gave us bogus size */
711 /* No need to change MaxChunks since already set to 1 */
712 chunk_sizes_updated
= true;
723 return total_bytes_written
;
727 smb2_flush_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
728 struct cifs_fid
*fid
)
730 return SMB2_flush(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
734 smb2_read_data_offset(char *buf
)
736 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
737 return rsp
->DataOffset
;
741 smb2_read_data_length(char *buf
)
743 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
744 return le32_to_cpu(rsp
->DataLength
);
749 smb2_sync_read(const unsigned int xid
, struct cifs_fid
*pfid
,
750 struct cifs_io_parms
*parms
, unsigned int *bytes_read
,
751 char **buf
, int *buf_type
)
753 parms
->persistent_fid
= pfid
->persistent_fid
;
754 parms
->volatile_fid
= pfid
->volatile_fid
;
755 return SMB2_read(xid
, parms
, bytes_read
, buf
, buf_type
);
759 smb2_sync_write(const unsigned int xid
, struct cifs_fid
*pfid
,
760 struct cifs_io_parms
*parms
, unsigned int *written
,
761 struct kvec
*iov
, unsigned long nr_segs
)
764 parms
->persistent_fid
= pfid
->persistent_fid
;
765 parms
->volatile_fid
= pfid
->volatile_fid
;
766 return SMB2_write(xid
, parms
, written
, iov
, nr_segs
);
769 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
770 static bool smb2_set_sparse(const unsigned int xid
, struct cifs_tcon
*tcon
,
771 struct cifsFileInfo
*cfile
, struct inode
*inode
, __u8 setsparse
)
773 struct cifsInodeInfo
*cifsi
;
776 cifsi
= CIFS_I(inode
);
778 /* if file already sparse don't bother setting sparse again */
779 if ((cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) && setsparse
)
780 return true; /* already sparse */
782 if (!(cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) && !setsparse
)
783 return true; /* already not sparse */
786 * Can't check for sparse support on share the usual way via the
787 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
788 * since Samba server doesn't set the flag on the share, yet
789 * supports the set sparse FSCTL and returns sparse correctly
790 * in the file attributes. If we fail setting sparse though we
791 * mark that server does not support sparse files for this share
792 * to avoid repeatedly sending the unsupported fsctl to server
793 * if the file is repeatedly extended.
795 if (tcon
->broken_sparse_sup
)
798 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
799 cfile
->fid
.volatile_fid
, FSCTL_SET_SPARSE
,
800 true /* is_fctl */, false /* use_ipc */,
801 &setsparse
, 1, NULL
, NULL
);
803 tcon
->broken_sparse_sup
= true;
804 cifs_dbg(FYI
, "set sparse rc = %d\n", rc
);
809 cifsi
->cifsAttrs
|= FILE_ATTRIBUTE_SPARSE_FILE
;
811 cifsi
->cifsAttrs
&= (~FILE_ATTRIBUTE_SPARSE_FILE
);
817 smb2_set_file_size(const unsigned int xid
, struct cifs_tcon
*tcon
,
818 struct cifsFileInfo
*cfile
, __u64 size
, bool set_alloc
)
820 __le64 eof
= cpu_to_le64(size
);
824 * If extending file more than one page make sparse. Many Linux fs
825 * make files sparse by default when extending via ftruncate
827 inode
= d_inode(cfile
->dentry
);
829 if (!set_alloc
&& (size
> inode
->i_size
+ 8192)) {
832 /* whether set sparse succeeds or not, extend the file */
833 smb2_set_sparse(xid
, tcon
, cfile
, inode
, set_sparse
);
836 return SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
837 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
, false);
841 smb2_duplicate_extents(const unsigned int xid
,
842 struct cifsFileInfo
*srcfile
,
843 struct cifsFileInfo
*trgtfile
, u64 src_off
,
844 u64 len
, u64 dest_off
)
847 unsigned int ret_data_len
;
848 struct duplicate_extents_to_file dup_ext_buf
;
849 struct cifs_tcon
*tcon
= tlink_tcon(trgtfile
->tlink
);
851 /* server fileays advertise duplicate extent support with this flag */
852 if ((le32_to_cpu(tcon
->fsAttrInfo
.Attributes
) &
853 FILE_SUPPORTS_BLOCK_REFCOUNTING
) == 0)
856 dup_ext_buf
.VolatileFileHandle
= srcfile
->fid
.volatile_fid
;
857 dup_ext_buf
.PersistentFileHandle
= srcfile
->fid
.persistent_fid
;
858 dup_ext_buf
.SourceFileOffset
= cpu_to_le64(src_off
);
859 dup_ext_buf
.TargetFileOffset
= cpu_to_le64(dest_off
);
860 dup_ext_buf
.ByteCount
= cpu_to_le64(len
);
861 cifs_dbg(FYI
, "duplicate extents: src off %lld dst off %lld len %lld",
862 src_off
, dest_off
, len
);
864 rc
= smb2_set_file_size(xid
, tcon
, trgtfile
, dest_off
+ len
, false);
866 goto duplicate_extents_out
;
868 rc
= SMB2_ioctl(xid
, tcon
, trgtfile
->fid
.persistent_fid
,
869 trgtfile
->fid
.volatile_fid
,
870 FSCTL_DUPLICATE_EXTENTS_TO_FILE
,
871 true /* is_fsctl */, false /* use_ipc */,
872 (char *)&dup_ext_buf
,
873 sizeof(struct duplicate_extents_to_file
),
877 if (ret_data_len
> 0)
878 cifs_dbg(FYI
, "non-zero response length in duplicate extents");
880 duplicate_extents_out
:
885 smb2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
886 struct cifsFileInfo
*cfile
)
888 return SMB2_set_compression(xid
, tcon
, cfile
->fid
.persistent_fid
,
889 cfile
->fid
.volatile_fid
);
893 smb3_set_integrity(const unsigned int xid
, struct cifs_tcon
*tcon
,
894 struct cifsFileInfo
*cfile
)
896 struct fsctl_set_integrity_information_req integr_info
;
897 unsigned int ret_data_len
;
899 integr_info
.ChecksumAlgorithm
= cpu_to_le16(CHECKSUM_TYPE_UNCHANGED
);
900 integr_info
.Flags
= 0;
901 integr_info
.Reserved
= 0;
903 return SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
904 cfile
->fid
.volatile_fid
,
905 FSCTL_SET_INTEGRITY_INFORMATION
,
906 true /* is_fsctl */, false /* use_ipc */,
907 (char *)&integr_info
,
908 sizeof(struct fsctl_set_integrity_information_req
),
915 smb3_enum_snapshots(const unsigned int xid
, struct cifs_tcon
*tcon
,
916 struct cifsFileInfo
*cfile
, void __user
*ioc_buf
)
919 unsigned int ret_data_len
= 0;
921 struct smb_snapshot_array snapshot_in
;
923 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
924 cfile
->fid
.volatile_fid
,
925 FSCTL_SRV_ENUMERATE_SNAPSHOTS
,
926 true /* is_fsctl */, false /* use_ipc */,
927 NULL
, 0 /* no input data */,
930 cifs_dbg(FYI
, "enum snaphots ioctl returned %d and ret buflen is %d\n",
935 if (ret_data_len
&& (ioc_buf
!= NULL
) && (retbuf
!= NULL
)) {
937 if (copy_from_user(&snapshot_in
, ioc_buf
,
938 sizeof(struct smb_snapshot_array
))) {
943 if (snapshot_in
.snapshot_array_size
< sizeof(struct smb_snapshot_array
)) {
948 if (ret_data_len
> snapshot_in
.snapshot_array_size
)
949 ret_data_len
= snapshot_in
.snapshot_array_size
;
951 if (copy_to_user(ioc_buf
, retbuf
, ret_data_len
))
960 smb2_query_dir_first(const unsigned int xid
, struct cifs_tcon
*tcon
,
961 const char *path
, struct cifs_sb_info
*cifs_sb
,
962 struct cifs_fid
*fid
, __u16 search_flags
,
963 struct cifs_search_info
*srch_inf
)
967 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
968 struct cifs_open_parms oparms
;
970 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
975 oparms
.desired_access
= FILE_READ_ATTRIBUTES
| FILE_READ_DATA
;
976 oparms
.disposition
= FILE_OPEN
;
977 oparms
.create_options
= 0;
979 oparms
.reconnect
= false;
981 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
);
984 cifs_dbg(VFS
, "open dir failed\n");
988 srch_inf
->entries_in_buffer
= 0;
989 srch_inf
->index_of_last_entry
= 0;
991 rc
= SMB2_query_directory(xid
, tcon
, fid
->persistent_fid
,
992 fid
->volatile_fid
, 0, srch_inf
);
994 cifs_dbg(VFS
, "query directory failed\n");
995 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
1001 smb2_query_dir_next(const unsigned int xid
, struct cifs_tcon
*tcon
,
1002 struct cifs_fid
*fid
, __u16 search_flags
,
1003 struct cifs_search_info
*srch_inf
)
1005 return SMB2_query_directory(xid
, tcon
, fid
->persistent_fid
,
1006 fid
->volatile_fid
, 0, srch_inf
);
1010 smb2_close_dir(const unsigned int xid
, struct cifs_tcon
*tcon
,
1011 struct cifs_fid
*fid
)
1013 return SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
1017 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1018 * the number of credits and return true. Otherwise - return false.
1021 smb2_is_status_pending(char *buf
, struct TCP_Server_Info
*server
, int length
)
1023 struct smb2_sync_hdr
*shdr
= get_sync_hdr(buf
);
1025 if (shdr
->Status
!= STATUS_PENDING
)
1029 spin_lock(&server
->req_lock
);
1030 server
->credits
+= le16_to_cpu(shdr
->CreditRequest
);
1031 spin_unlock(&server
->req_lock
);
1032 wake_up(&server
->request_q
);
1039 smb2_oplock_response(struct cifs_tcon
*tcon
, struct cifs_fid
*fid
,
1040 struct cifsInodeInfo
*cinode
)
1042 if (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
)
1043 return SMB2_lease_break(0, tcon
, cinode
->lease_key
,
1044 smb2_get_lease_state(cinode
));
1046 return SMB2_oplock_break(0, tcon
, fid
->persistent_fid
,
1048 CIFS_CACHE_READ(cinode
) ? 1 : 0);
1052 smb2_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
1053 struct kstatfs
*buf
)
1056 __le16 srch_path
= 0; /* Null - open root of share */
1057 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1058 struct cifs_open_parms oparms
;
1059 struct cifs_fid fid
;
1062 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
1063 oparms
.disposition
= FILE_OPEN
;
1064 oparms
.create_options
= 0;
1066 oparms
.reconnect
= false;
1068 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
);
1071 buf
->f_type
= SMB2_MAGIC_NUMBER
;
1072 rc
= SMB2_QFS_info(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
1074 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
1079 smb2_compare_fids(struct cifsFileInfo
*ob1
, struct cifsFileInfo
*ob2
)
1081 return ob1
->fid
.persistent_fid
== ob2
->fid
.persistent_fid
&&
1082 ob1
->fid
.volatile_fid
== ob2
->fid
.volatile_fid
;
1086 smb2_mand_lock(const unsigned int xid
, struct cifsFileInfo
*cfile
, __u64 offset
,
1087 __u64 length
, __u32 type
, int lock
, int unlock
, bool wait
)
1089 if (unlock
&& !lock
)
1090 type
= SMB2_LOCKFLAG_UNLOCK
;
1091 return SMB2_lock(xid
, tlink_tcon(cfile
->tlink
),
1092 cfile
->fid
.persistent_fid
, cfile
->fid
.volatile_fid
,
1093 current
->tgid
, length
, offset
, type
, wait
);
1097 smb2_get_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
1099 memcpy(fid
->lease_key
, CIFS_I(inode
)->lease_key
, SMB2_LEASE_KEY_SIZE
);
1103 smb2_set_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
1105 memcpy(CIFS_I(inode
)->lease_key
, fid
->lease_key
, SMB2_LEASE_KEY_SIZE
);
1109 smb2_new_lease_key(struct cifs_fid
*fid
)
1111 generate_random_uuid(fid
->lease_key
);
1115 smb2_get_dfs_refer(const unsigned int xid
, struct cifs_ses
*ses
,
1116 const char *search_name
,
1117 struct dfs_info3_param
**target_nodes
,
1118 unsigned int *num_of_nodes
,
1119 const struct nls_table
*nls_codepage
, int remap
)
1122 __le16
*utf16_path
= NULL
;
1123 int utf16_path_len
= 0;
1124 struct cifs_tcon
*tcon
;
1125 struct fsctl_get_dfs_referral_req
*dfs_req
= NULL
;
1126 struct get_dfs_referral_rsp
*dfs_rsp
= NULL
;
1127 u32 dfs_req_size
= 0, dfs_rsp_size
= 0;
1129 cifs_dbg(FYI
, "smb2_get_dfs_refer path <%s>\n", search_name
);
1132 * Use any tcon from the current session. Here, the first one.
1134 spin_lock(&cifs_tcp_ses_lock
);
1135 tcon
= list_first_entry_or_null(&ses
->tcon_list
, struct cifs_tcon
,
1139 spin_unlock(&cifs_tcp_ses_lock
);
1142 cifs_dbg(VFS
, "session %p has no tcon available for a dfs referral request\n",
1148 utf16_path
= cifs_strndup_to_utf16(search_name
, PATH_MAX
,
1150 nls_codepage
, remap
);
1156 dfs_req_size
= sizeof(*dfs_req
) + utf16_path_len
;
1157 dfs_req
= kzalloc(dfs_req_size
, GFP_KERNEL
);
1163 /* Highest DFS referral version understood */
1164 dfs_req
->MaxReferralLevel
= DFS_VERSION
;
1166 /* Path to resolve in an UTF-16 null-terminated string */
1167 memcpy(dfs_req
->RequestFileName
, utf16_path
, utf16_path_len
);
1170 /* try first with IPC */
1171 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
1172 FSCTL_DFS_GET_REFERRALS
,
1173 true /* is_fsctl */, true /* use_ipc */,
1174 (char *)dfs_req
, dfs_req_size
,
1175 (char **)&dfs_rsp
, &dfs_rsp_size
);
1176 if (rc
== -ENOTCONN
) {
1177 /* try with normal tcon */
1178 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
1179 FSCTL_DFS_GET_REFERRALS
,
1180 true /* is_fsctl */, false /*use_ipc*/,
1181 (char *)dfs_req
, dfs_req_size
,
1182 (char **)&dfs_rsp
, &dfs_rsp_size
);
1184 } while (rc
== -EAGAIN
);
1187 cifs_dbg(VFS
, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc
);
1191 rc
= parse_dfs_referrals(dfs_rsp
, dfs_rsp_size
,
1192 num_of_nodes
, target_nodes
,
1193 nls_codepage
, remap
, search_name
,
1194 true /* is_unicode */);
1196 cifs_dbg(VFS
, "parse error in smb2_get_dfs_refer rc=%d\n", rc
);
1202 spin_lock(&cifs_tcp_ses_lock
);
1204 spin_unlock(&cifs_tcp_ses_lock
);
1211 #define SMB2_SYMLINK_STRUCT_SIZE \
1212 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1215 smb2_query_symlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
1216 const char *full_path
, char **target_path
,
1217 struct cifs_sb_info
*cifs_sb
)
1221 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
1222 struct cifs_open_parms oparms
;
1223 struct cifs_fid fid
;
1224 struct smb2_err_rsp
*err_buf
= NULL
;
1225 struct smb2_symlink_err_rsp
*symlink
;
1226 unsigned int sub_len
;
1227 unsigned int sub_offset
;
1228 unsigned int print_len
;
1229 unsigned int print_offset
;
1231 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, full_path
);
1233 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
1238 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
1239 oparms
.disposition
= FILE_OPEN
;
1240 oparms
.create_options
= 0;
1242 oparms
.reconnect
= false;
1244 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, &err_buf
);
1246 if (!rc
|| !err_buf
) {
1251 if (le32_to_cpu(err_buf
->ByteCount
) < sizeof(struct smb2_symlink_err_rsp
) ||
1252 get_rfc1002_length(err_buf
) + 4 < SMB2_SYMLINK_STRUCT_SIZE
) {
1257 /* open must fail on symlink - reset rc */
1259 symlink
= (struct smb2_symlink_err_rsp
*)err_buf
->ErrorData
;
1260 sub_len
= le16_to_cpu(symlink
->SubstituteNameLength
);
1261 sub_offset
= le16_to_cpu(symlink
->SubstituteNameOffset
);
1262 print_len
= le16_to_cpu(symlink
->PrintNameLength
);
1263 print_offset
= le16_to_cpu(symlink
->PrintNameOffset
);
1265 if (get_rfc1002_length(err_buf
) + 4 <
1266 SMB2_SYMLINK_STRUCT_SIZE
+ sub_offset
+ sub_len
) {
1271 if (get_rfc1002_length(err_buf
) + 4 <
1272 SMB2_SYMLINK_STRUCT_SIZE
+ print_offset
+ print_len
) {
1277 *target_path
= cifs_strndup_from_utf16(
1278 (char *)symlink
->PathBuffer
+ sub_offset
,
1279 sub_len
, true, cifs_sb
->local_nls
);
1280 if (!(*target_path
)) {
1284 convert_delimiter(*target_path
, '/');
1285 cifs_dbg(FYI
, "%s: target path: %s\n", __func__
, *target_path
);
1290 static long smb3_zero_range(struct file
*file
, struct cifs_tcon
*tcon
,
1291 loff_t offset
, loff_t len
, bool keep_size
)
1293 struct inode
*inode
;
1294 struct cifsInodeInfo
*cifsi
;
1295 struct cifsFileInfo
*cfile
= file
->private_data
;
1296 struct file_zero_data_information fsctl_buf
;
1302 inode
= d_inode(cfile
->dentry
);
1303 cifsi
= CIFS_I(inode
);
1305 /* if file not oplocked can't be sure whether asking to extend size */
1306 if (!CIFS_CACHE_READ(cifsi
))
1307 if (keep_size
== false)
1311 * Must check if file sparse since fallocate -z (zero range) assumes
1312 * non-sparse allocation
1314 if (!(cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
))
1318 * need to make sure we are not asked to extend the file since the SMB3
1319 * fsctl does not change the file size. In the future we could change
1320 * this to zero the first part of the range then set the file size
1321 * which for a non sparse file would zero the newly extended range
1323 if (keep_size
== false)
1324 if (i_size_read(inode
) < offset
+ len
)
1327 cifs_dbg(FYI
, "offset %lld len %lld", offset
, len
);
1329 fsctl_buf
.FileOffset
= cpu_to_le64(offset
);
1330 fsctl_buf
.BeyondFinalZero
= cpu_to_le64(offset
+ len
);
1332 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
1333 cfile
->fid
.volatile_fid
, FSCTL_SET_ZERO_DATA
,
1334 true /* is_fctl */, false /* use_ipc */,
1336 sizeof(struct file_zero_data_information
), NULL
, NULL
);
1341 static long smb3_punch_hole(struct file
*file
, struct cifs_tcon
*tcon
,
1342 loff_t offset
, loff_t len
)
1344 struct inode
*inode
;
1345 struct cifsInodeInfo
*cifsi
;
1346 struct cifsFileInfo
*cfile
= file
->private_data
;
1347 struct file_zero_data_information fsctl_buf
;
1350 __u8 set_sparse
= 1;
1354 inode
= d_inode(cfile
->dentry
);
1355 cifsi
= CIFS_I(inode
);
1357 /* Need to make file sparse, if not already, before freeing range. */
1358 /* Consider adding equivalent for compressed since it could also work */
1359 if (!smb2_set_sparse(xid
, tcon
, cfile
, inode
, set_sparse
))
1362 cifs_dbg(FYI
, "offset %lld len %lld", offset
, len
);
1364 fsctl_buf
.FileOffset
= cpu_to_le64(offset
);
1365 fsctl_buf
.BeyondFinalZero
= cpu_to_le64(offset
+ len
);
1367 rc
= SMB2_ioctl(xid
, tcon
, cfile
->fid
.persistent_fid
,
1368 cfile
->fid
.volatile_fid
, FSCTL_SET_ZERO_DATA
,
1369 true /* is_fctl */, false /* use_ipc */,
1371 sizeof(struct file_zero_data_information
), NULL
, NULL
);
1376 static long smb3_simple_falloc(struct file
*file
, struct cifs_tcon
*tcon
,
1377 loff_t off
, loff_t len
, bool keep_size
)
1379 struct inode
*inode
;
1380 struct cifsInodeInfo
*cifsi
;
1381 struct cifsFileInfo
*cfile
= file
->private_data
;
1382 long rc
= -EOPNOTSUPP
;
1387 inode
= d_inode(cfile
->dentry
);
1388 cifsi
= CIFS_I(inode
);
1390 /* if file not oplocked can't be sure whether asking to extend size */
1391 if (!CIFS_CACHE_READ(cifsi
))
1392 if (keep_size
== false)
1396 * Files are non-sparse by default so falloc may be a no-op
1397 * Must check if file sparse. If not sparse, and not extending
1398 * then no need to do anything since file already allocated
1400 if ((cifsi
->cifsAttrs
& FILE_ATTRIBUTE_SPARSE_FILE
) == 0) {
1401 if (keep_size
== true)
1403 /* check if extending file */
1404 else if (i_size_read(inode
) >= off
+ len
)
1405 /* not extending file and already not sparse */
1407 /* BB: in future add else clause to extend file */
1412 if ((keep_size
== true) || (i_size_read(inode
) >= off
+ len
)) {
1414 * Check if falloc starts within first few pages of file
1415 * and ends within a few pages of the end of file to
1416 * ensure that most of file is being forced to be
1417 * fallocated now. If so then setting whole file sparse
1418 * ie potentially making a few extra pages at the beginning
1419 * or end of the file non-sparse via set_sparse is harmless.
1421 if ((off
> 8192) || (off
+ len
+ 8192 < i_size_read(inode
)))
1424 rc
= smb2_set_sparse(xid
, tcon
, cfile
, inode
, false);
1426 /* BB: else ... in future add code to extend file and set sparse */
1434 static long smb3_fallocate(struct file
*file
, struct cifs_tcon
*tcon
, int mode
,
1435 loff_t off
, loff_t len
)
1437 /* KEEP_SIZE already checked for by do_fallocate */
1438 if (mode
& FALLOC_FL_PUNCH_HOLE
)
1439 return smb3_punch_hole(file
, tcon
, off
, len
);
1440 else if (mode
& FALLOC_FL_ZERO_RANGE
) {
1441 if (mode
& FALLOC_FL_KEEP_SIZE
)
1442 return smb3_zero_range(file
, tcon
, off
, len
, true);
1443 return smb3_zero_range(file
, tcon
, off
, len
, false);
1444 } else if (mode
== FALLOC_FL_KEEP_SIZE
)
1445 return smb3_simple_falloc(file
, tcon
, off
, len
, true);
1447 return smb3_simple_falloc(file
, tcon
, off
, len
, false);
1453 smb2_downgrade_oplock(struct TCP_Server_Info
*server
,
1454 struct cifsInodeInfo
*cinode
, bool set_level2
)
1457 server
->ops
->set_oplock_level(cinode
, SMB2_OPLOCK_LEVEL_II
,
1460 server
->ops
->set_oplock_level(cinode
, 0, 0, NULL
);
1464 smb2_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
1465 unsigned int epoch
, bool *purge_cache
)
1468 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
1470 if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
1471 cinode
->oplock
= CIFS_CACHE_RHW_FLG
;
1472 cifs_dbg(FYI
, "Batch Oplock granted on inode %p\n",
1473 &cinode
->vfs_inode
);
1474 } else if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
) {
1475 cinode
->oplock
= CIFS_CACHE_RW_FLG
;
1476 cifs_dbg(FYI
, "Exclusive Oplock granted on inode %p\n",
1477 &cinode
->vfs_inode
);
1478 } else if (oplock
== SMB2_OPLOCK_LEVEL_II
) {
1479 cinode
->oplock
= CIFS_CACHE_READ_FLG
;
1480 cifs_dbg(FYI
, "Level II Oplock granted on inode %p\n",
1481 &cinode
->vfs_inode
);
1487 smb21_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
1488 unsigned int epoch
, bool *purge_cache
)
1490 char message
[5] = {0};
1493 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
1497 if (oplock
& SMB2_LEASE_READ_CACHING_HE
) {
1498 cinode
->oplock
|= CIFS_CACHE_READ_FLG
;
1499 strcat(message
, "R");
1501 if (oplock
& SMB2_LEASE_HANDLE_CACHING_HE
) {
1502 cinode
->oplock
|= CIFS_CACHE_HANDLE_FLG
;
1503 strcat(message
, "H");
1505 if (oplock
& SMB2_LEASE_WRITE_CACHING_HE
) {
1506 cinode
->oplock
|= CIFS_CACHE_WRITE_FLG
;
1507 strcat(message
, "W");
1509 if (!cinode
->oplock
)
1510 strcat(message
, "None");
1511 cifs_dbg(FYI
, "%s Lease granted on inode %p\n", message
,
1512 &cinode
->vfs_inode
);
1516 smb3_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
1517 unsigned int epoch
, bool *purge_cache
)
1519 unsigned int old_oplock
= cinode
->oplock
;
1521 smb21_set_oplock_level(cinode
, oplock
, epoch
, purge_cache
);
1524 *purge_cache
= false;
1525 if (old_oplock
== CIFS_CACHE_READ_FLG
) {
1526 if (cinode
->oplock
== CIFS_CACHE_READ_FLG
&&
1527 (epoch
- cinode
->epoch
> 0))
1528 *purge_cache
= true;
1529 else if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
1530 (epoch
- cinode
->epoch
> 1))
1531 *purge_cache
= true;
1532 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
1533 (epoch
- cinode
->epoch
> 1))
1534 *purge_cache
= true;
1535 else if (cinode
->oplock
== 0 &&
1536 (epoch
- cinode
->epoch
> 0))
1537 *purge_cache
= true;
1538 } else if (old_oplock
== CIFS_CACHE_RH_FLG
) {
1539 if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
1540 (epoch
- cinode
->epoch
> 0))
1541 *purge_cache
= true;
1542 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
1543 (epoch
- cinode
->epoch
> 1))
1544 *purge_cache
= true;
1546 cinode
->epoch
= epoch
;
1551 smb2_is_read_op(__u32 oplock
)
1553 return oplock
== SMB2_OPLOCK_LEVEL_II
;
1557 smb21_is_read_op(__u32 oplock
)
1559 return (oplock
& SMB2_LEASE_READ_CACHING_HE
) &&
1560 !(oplock
& SMB2_LEASE_WRITE_CACHING_HE
);
1564 map_oplock_to_lease(u8 oplock
)
1566 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
1567 return SMB2_LEASE_WRITE_CACHING
| SMB2_LEASE_READ_CACHING
;
1568 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
1569 return SMB2_LEASE_READ_CACHING
;
1570 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
1571 return SMB2_LEASE_HANDLE_CACHING
| SMB2_LEASE_READ_CACHING
|
1572 SMB2_LEASE_WRITE_CACHING
;
1577 smb2_create_lease_buf(u8
*lease_key
, u8 oplock
)
1579 struct create_lease
*buf
;
1581 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
1585 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
1586 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
1587 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
1589 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1590 (struct create_lease
, lcontext
));
1591 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
1592 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1593 (struct create_lease
, Name
));
1594 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1595 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1604 smb3_create_lease_buf(u8
*lease_key
, u8 oplock
)
1606 struct create_lease_v2
*buf
;
1608 buf
= kzalloc(sizeof(struct create_lease_v2
), GFP_KERNEL
);
1612 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
1613 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
1614 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
1616 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1617 (struct create_lease_v2
, lcontext
));
1618 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context_v2
));
1619 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1620 (struct create_lease_v2
, Name
));
1621 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1622 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1631 smb2_parse_lease_buf(void *buf
, unsigned int *epoch
)
1633 struct create_lease
*lc
= (struct create_lease
*)buf
;
1635 *epoch
= 0; /* not used */
1636 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
1637 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
1638 return le32_to_cpu(lc
->lcontext
.LeaseState
);
1642 smb3_parse_lease_buf(void *buf
, unsigned int *epoch
)
1644 struct create_lease_v2
*lc
= (struct create_lease_v2
*)buf
;
1646 *epoch
= le16_to_cpu(lc
->lcontext
.Epoch
);
1647 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
1648 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
1649 return le32_to_cpu(lc
->lcontext
.LeaseState
);
1653 smb2_wp_retry_size(struct inode
*inode
)
1655 return min_t(unsigned int, CIFS_SB(inode
->i_sb
)->wsize
,
1656 SMB2_MAX_BUFFER_SIZE
);
1660 smb2_dir_needs_close(struct cifsFileInfo
*cfile
)
1662 return !cfile
->invalidHandle
;
1666 fill_transform_hdr(struct smb2_transform_hdr
*tr_hdr
, struct smb_rqst
*old_rq
)
1668 struct smb2_sync_hdr
*shdr
=
1669 (struct smb2_sync_hdr
*)old_rq
->rq_iov
[1].iov_base
;
1670 unsigned int orig_len
= get_rfc1002_length(old_rq
->rq_iov
[0].iov_base
);
1672 memset(tr_hdr
, 0, sizeof(struct smb2_transform_hdr
));
1673 tr_hdr
->ProtocolId
= SMB2_TRANSFORM_PROTO_NUM
;
1674 tr_hdr
->OriginalMessageSize
= cpu_to_le32(orig_len
);
1675 tr_hdr
->Flags
= cpu_to_le16(0x01);
1676 get_random_bytes(&tr_hdr
->Nonce
, SMB3_AES128CMM_NONCE
);
1677 memcpy(&tr_hdr
->SessionId
, &shdr
->SessionId
, 8);
1678 inc_rfc1001_len(tr_hdr
, sizeof(struct smb2_transform_hdr
) - 4);
1679 inc_rfc1001_len(tr_hdr
, orig_len
);
1682 static struct scatterlist
*
1683 init_sg(struct smb_rqst
*rqst
, u8
*sign
)
1685 unsigned int sg_len
= rqst
->rq_nvec
+ rqst
->rq_npages
+ 1;
1686 unsigned int assoc_data_len
= sizeof(struct smb2_transform_hdr
) - 24;
1687 struct scatterlist
*sg
;
1691 sg
= kmalloc_array(sg_len
, sizeof(struct scatterlist
), GFP_KERNEL
);
1695 sg_init_table(sg
, sg_len
);
1696 sg_set_buf(&sg
[0], rqst
->rq_iov
[0].iov_base
+ 24, assoc_data_len
);
1697 for (i
= 1; i
< rqst
->rq_nvec
; i
++)
1698 sg_set_buf(&sg
[i
], rqst
->rq_iov
[i
].iov_base
,
1699 rqst
->rq_iov
[i
].iov_len
);
1700 for (j
= 0; i
< sg_len
- 1; i
++, j
++) {
1701 unsigned int len
= (j
< rqst
->rq_npages
- 1) ? rqst
->rq_pagesz
1703 sg_set_page(&sg
[i
], rqst
->rq_pages
[j
], len
, 0);
1705 sg_set_buf(&sg
[sg_len
- 1], sign
, SMB2_SIGNATURE_SIZE
);
1709 struct cifs_crypt_result
{
1711 struct completion completion
;
1714 static void cifs_crypt_complete(struct crypto_async_request
*req
, int err
)
1716 struct cifs_crypt_result
*res
= req
->data
;
1718 if (err
== -EINPROGRESS
)
1722 complete(&res
->completion
);
1726 smb2_get_enc_key(struct TCP_Server_Info
*server
, __u64 ses_id
, int enc
, u8
*key
)
1728 struct cifs_ses
*ses
;
1731 spin_lock(&cifs_tcp_ses_lock
);
1732 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
1733 if (ses
->Suid
!= ses_id
)
1735 ses_enc_key
= enc
? ses
->smb3encryptionkey
:
1736 ses
->smb3decryptionkey
;
1737 memcpy(key
, ses_enc_key
, SMB3_SIGN_KEY_SIZE
);
1738 spin_unlock(&cifs_tcp_ses_lock
);
1741 spin_unlock(&cifs_tcp_ses_lock
);
1746 * Encrypt or decrypt @rqst message. @rqst has the following format:
1747 * iov[0] - transform header (associate data),
1748 * iov[1-N] and pages - data to encrypt.
1749 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
1753 crypt_message(struct TCP_Server_Info
*server
, struct smb_rqst
*rqst
, int enc
)
1755 struct smb2_transform_hdr
*tr_hdr
=
1756 (struct smb2_transform_hdr
*)rqst
->rq_iov
[0].iov_base
;
1757 unsigned int assoc_data_len
= sizeof(struct smb2_transform_hdr
) - 24;
1759 struct scatterlist
*sg
;
1760 u8 sign
[SMB2_SIGNATURE_SIZE
] = {};
1761 u8 key
[SMB3_SIGN_KEY_SIZE
];
1762 struct aead_request
*req
;
1764 unsigned int iv_len
;
1765 struct cifs_crypt_result result
= {0, };
1766 struct crypto_aead
*tfm
;
1767 unsigned int crypt_len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
);
1769 init_completion(&result
.completion
);
1771 rc
= smb2_get_enc_key(server
, tr_hdr
->SessionId
, enc
, key
);
1773 cifs_dbg(VFS
, "%s: Could not get %scryption key\n", __func__
,
1778 rc
= smb3_crypto_aead_allocate(server
);
1780 cifs_dbg(VFS
, "%s: crypto alloc failed\n", __func__
);
1784 tfm
= enc
? server
->secmech
.ccmaesencrypt
:
1785 server
->secmech
.ccmaesdecrypt
;
1786 rc
= crypto_aead_setkey(tfm
, key
, SMB3_SIGN_KEY_SIZE
);
1788 cifs_dbg(VFS
, "%s: Failed to set aead key %d\n", __func__
, rc
);
1792 rc
= crypto_aead_setauthsize(tfm
, SMB2_SIGNATURE_SIZE
);
1794 cifs_dbg(VFS
, "%s: Failed to set authsize %d\n", __func__
, rc
);
1798 req
= aead_request_alloc(tfm
, GFP_KERNEL
);
1800 cifs_dbg(VFS
, "%s: Failed to alloc aead request", __func__
);
1805 memcpy(sign
, &tr_hdr
->Signature
, SMB2_SIGNATURE_SIZE
);
1806 crypt_len
+= SMB2_SIGNATURE_SIZE
;
1809 sg
= init_sg(rqst
, sign
);
1811 cifs_dbg(VFS
, "%s: Failed to init sg %d", __func__
, rc
);
1815 iv_len
= crypto_aead_ivsize(tfm
);
1816 iv
= kzalloc(iv_len
, GFP_KERNEL
);
1818 cifs_dbg(VFS
, "%s: Failed to alloc IV", __func__
);
1822 memcpy(iv
+ 1, (char *)tr_hdr
->Nonce
, SMB3_AES128CMM_NONCE
);
1824 aead_request_set_crypt(req
, sg
, sg
, crypt_len
, iv
);
1825 aead_request_set_ad(req
, assoc_data_len
);
1827 aead_request_set_callback(req
, CRYPTO_TFM_REQ_MAY_BACKLOG
,
1828 cifs_crypt_complete
, &result
);
1830 rc
= enc
? crypto_aead_encrypt(req
) : crypto_aead_decrypt(req
);
1832 if (rc
== -EINPROGRESS
|| rc
== -EBUSY
) {
1833 wait_for_completion(&result
.completion
);
1838 memcpy(&tr_hdr
->Signature
, sign
, SMB2_SIGNATURE_SIZE
);
1849 smb3_init_transform_rq(struct TCP_Server_Info
*server
, struct smb_rqst
*new_rq
,
1850 struct smb_rqst
*old_rq
)
1853 struct page
**pages
;
1854 struct smb2_transform_hdr
*tr_hdr
;
1855 unsigned int npages
= old_rq
->rq_npages
;
1859 pages
= kmalloc_array(npages
, sizeof(struct page
*), GFP_KERNEL
);
1863 new_rq
->rq_pages
= pages
;
1864 new_rq
->rq_npages
= old_rq
->rq_npages
;
1865 new_rq
->rq_pagesz
= old_rq
->rq_pagesz
;
1866 new_rq
->rq_tailsz
= old_rq
->rq_tailsz
;
1868 for (i
= 0; i
< npages
; i
++) {
1869 pages
[i
] = alloc_page(GFP_KERNEL
|__GFP_HIGHMEM
);
1871 goto err_free_pages
;
1874 iov
= kmalloc_array(old_rq
->rq_nvec
, sizeof(struct kvec
), GFP_KERNEL
);
1876 goto err_free_pages
;
1878 /* copy all iovs from the old except the 1st one (rfc1002 length) */
1879 memcpy(&iov
[1], &old_rq
->rq_iov
[1],
1880 sizeof(struct kvec
) * (old_rq
->rq_nvec
- 1));
1881 new_rq
->rq_iov
= iov
;
1882 new_rq
->rq_nvec
= old_rq
->rq_nvec
;
1884 tr_hdr
= kmalloc(sizeof(struct smb2_transform_hdr
), GFP_KERNEL
);
1888 /* fill the 1st iov with a transform header */
1889 fill_transform_hdr(tr_hdr
, old_rq
);
1890 new_rq
->rq_iov
[0].iov_base
= tr_hdr
;
1891 new_rq
->rq_iov
[0].iov_len
= sizeof(struct smb2_transform_hdr
);
1893 /* copy pages form the old */
1894 for (i
= 0; i
< npages
; i
++) {
1895 char *dst
= kmap(new_rq
->rq_pages
[i
]);
1896 char *src
= kmap(old_rq
->rq_pages
[i
]);
1897 unsigned int len
= (i
< npages
- 1) ? new_rq
->rq_pagesz
:
1899 memcpy(dst
, src
, len
);
1900 kunmap(new_rq
->rq_pages
[i
]);
1901 kunmap(old_rq
->rq_pages
[i
]);
1904 rc
= crypt_message(server
, new_rq
, 1);
1905 cifs_dbg(FYI
, "encrypt message returned %d", rc
);
1907 goto err_free_tr_hdr
;
1916 for (i
= i
- 1; i
>= 0; i
--)
1923 smb3_free_transform_rq(struct smb_rqst
*rqst
)
1925 int i
= rqst
->rq_npages
- 1;
1928 put_page(rqst
->rq_pages
[i
]);
1929 kfree(rqst
->rq_pages
);
1930 /* free transform header */
1931 kfree(rqst
->rq_iov
[0].iov_base
);
1932 kfree(rqst
->rq_iov
);
1936 smb3_is_transform_hdr(void *buf
)
1938 struct smb2_transform_hdr
*trhdr
= buf
;
1940 return trhdr
->ProtocolId
== SMB2_TRANSFORM_PROTO_NUM
;
1944 decrypt_raw_data(struct TCP_Server_Info
*server
, char *buf
,
1945 unsigned int buf_data_size
, struct page
**pages
,
1946 unsigned int npages
, unsigned int page_data_size
)
1949 struct smb_rqst rqst
= {NULL
};
1950 struct smb2_hdr
*hdr
;
1953 iov
[0].iov_base
= buf
;
1954 iov
[0].iov_len
= sizeof(struct smb2_transform_hdr
);
1955 iov
[1].iov_base
= buf
+ sizeof(struct smb2_transform_hdr
);
1956 iov
[1].iov_len
= buf_data_size
;
1960 rqst
.rq_pages
= pages
;
1961 rqst
.rq_npages
= npages
;
1962 rqst
.rq_pagesz
= PAGE_SIZE
;
1963 rqst
.rq_tailsz
= (page_data_size
% PAGE_SIZE
) ? : PAGE_SIZE
;
1965 rc
= crypt_message(server
, &rqst
, 0);
1966 cifs_dbg(FYI
, "decrypt message returned %d\n", rc
);
1971 memmove(buf
+ 4, iov
[1].iov_base
, buf_data_size
);
1972 hdr
= (struct smb2_hdr
*)buf
;
1973 hdr
->smb2_buf_length
= cpu_to_be32(buf_data_size
+ page_data_size
);
1974 server
->total_read
= buf_data_size
+ page_data_size
+ 4;
1980 read_data_into_pages(struct TCP_Server_Info
*server
, struct page
**pages
,
1981 unsigned int npages
, unsigned int len
)
1986 for (i
= 0; i
< npages
; i
++) {
1987 struct page
*page
= pages
[i
];
1991 if (len
>= PAGE_SIZE
) {
1992 /* enough data to fill the page */
1996 zero_user(page
, len
, PAGE_SIZE
- len
);
1999 length
= cifs_read_page_from_socket(server
, page
, n
);
2002 server
->total_read
+= length
;
2009 init_read_bvec(struct page
**pages
, unsigned int npages
, unsigned int data_size
,
2010 unsigned int cur_off
, struct bio_vec
**page_vec
)
2012 struct bio_vec
*bvec
;
2015 bvec
= kcalloc(npages
, sizeof(struct bio_vec
), GFP_KERNEL
);
2019 for (i
= 0; i
< npages
; i
++) {
2020 bvec
[i
].bv_page
= pages
[i
];
2021 bvec
[i
].bv_offset
= (i
== 0) ? cur_off
: 0;
2022 bvec
[i
].bv_len
= min_t(unsigned int, PAGE_SIZE
, data_size
);
2023 data_size
-= bvec
[i
].bv_len
;
2026 if (data_size
!= 0) {
2027 cifs_dbg(VFS
, "%s: something went wrong\n", __func__
);
2037 handle_read_data(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
,
2038 char *buf
, unsigned int buf_len
, struct page
**pages
,
2039 unsigned int npages
, unsigned int page_data_size
)
2041 unsigned int data_offset
;
2042 unsigned int data_len
;
2043 unsigned int cur_off
;
2044 unsigned int cur_page_idx
;
2045 unsigned int pad_len
;
2046 struct cifs_readdata
*rdata
= mid
->callback_data
;
2047 struct smb2_sync_hdr
*shdr
= get_sync_hdr(buf
);
2048 struct bio_vec
*bvec
= NULL
;
2049 struct iov_iter iter
;
2053 if (shdr
->Command
!= SMB2_READ
) {
2054 cifs_dbg(VFS
, "only big read responses are supported\n");
2058 if (server
->ops
->is_status_pending
&&
2059 server
->ops
->is_status_pending(buf
, server
, 0))
2062 rdata
->result
= server
->ops
->map_error(buf
, false);
2063 if (rdata
->result
!= 0) {
2064 cifs_dbg(FYI
, "%s: server returned error %d\n",
2065 __func__
, rdata
->result
);
2066 dequeue_mid(mid
, rdata
->result
);
2070 data_offset
= server
->ops
->read_data_offset(buf
) + 4;
2071 data_len
= server
->ops
->read_data_length(buf
);
2073 if (data_offset
< server
->vals
->read_rsp_size
) {
2075 * win2k8 sometimes sends an offset of 0 when the read
2076 * is beyond the EOF. Treat it as if the data starts just after
2079 cifs_dbg(FYI
, "%s: data offset (%u) inside read response header\n",
2080 __func__
, data_offset
);
2081 data_offset
= server
->vals
->read_rsp_size
;
2082 } else if (data_offset
> MAX_CIFS_SMALL_BUFFER_SIZE
) {
2083 /* data_offset is beyond the end of smallbuf */
2084 cifs_dbg(FYI
, "%s: data offset (%u) beyond end of smallbuf\n",
2085 __func__
, data_offset
);
2086 rdata
->result
= -EIO
;
2087 dequeue_mid(mid
, rdata
->result
);
2091 pad_len
= data_offset
- server
->vals
->read_rsp_size
;
2093 if (buf_len
<= data_offset
) {
2094 /* read response payload is in pages */
2095 cur_page_idx
= pad_len
/ PAGE_SIZE
;
2096 cur_off
= pad_len
% PAGE_SIZE
;
2098 if (cur_page_idx
!= 0) {
2099 /* data offset is beyond the 1st page of response */
2100 cifs_dbg(FYI
, "%s: data offset (%u) beyond 1st page of response\n",
2101 __func__
, data_offset
);
2102 rdata
->result
= -EIO
;
2103 dequeue_mid(mid
, rdata
->result
);
2107 if (data_len
> page_data_size
- pad_len
) {
2108 /* data_len is corrupt -- discard frame */
2109 rdata
->result
= -EIO
;
2110 dequeue_mid(mid
, rdata
->result
);
2114 rdata
->result
= init_read_bvec(pages
, npages
, page_data_size
,
2116 if (rdata
->result
!= 0) {
2117 dequeue_mid(mid
, rdata
->result
);
2121 iov_iter_bvec(&iter
, WRITE
| ITER_BVEC
, bvec
, npages
, data_len
);
2122 } else if (buf_len
>= data_offset
+ data_len
) {
2123 /* read response payload is in buf */
2124 WARN_ONCE(npages
> 0, "read data can be either in buf or in pages");
2125 iov
.iov_base
= buf
+ data_offset
;
2126 iov
.iov_len
= data_len
;
2127 iov_iter_kvec(&iter
, WRITE
| ITER_KVEC
, &iov
, 1, data_len
);
2129 /* read response payload cannot be in both buf and pages */
2130 WARN_ONCE(1, "buf can not contain only a part of read data");
2131 rdata
->result
= -EIO
;
2132 dequeue_mid(mid
, rdata
->result
);
2136 /* set up first iov for signature check */
2137 rdata
->iov
[0].iov_base
= buf
;
2138 rdata
->iov
[0].iov_len
= 4;
2139 rdata
->iov
[1].iov_base
= buf
+ 4;
2140 rdata
->iov
[1].iov_len
= server
->vals
->read_rsp_size
- 4;
2141 cifs_dbg(FYI
, "0: iov_base=%p iov_len=%zu\n",
2142 rdata
->iov
[0].iov_base
, server
->vals
->read_rsp_size
);
2144 length
= rdata
->copy_into_pages(server
, rdata
, &iter
);
2151 dequeue_mid(mid
, false);
2156 receive_encrypted_read(struct TCP_Server_Info
*server
, struct mid_q_entry
**mid
)
2158 char *buf
= server
->smallbuf
;
2159 struct smb2_transform_hdr
*tr_hdr
= (struct smb2_transform_hdr
*)buf
;
2160 unsigned int npages
;
2161 struct page
**pages
;
2163 unsigned int buflen
= get_rfc1002_length(buf
) + 4;
2167 len
= min_t(unsigned int, buflen
, server
->vals
->read_rsp_size
- 4 +
2168 sizeof(struct smb2_transform_hdr
)) - HEADER_SIZE(server
) + 1;
2170 rc
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1, len
);
2173 server
->total_read
+= rc
;
2175 len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
) + 4 -
2176 server
->vals
->read_rsp_size
;
2177 npages
= DIV_ROUND_UP(len
, PAGE_SIZE
);
2179 pages
= kmalloc_array(npages
, sizeof(struct page
*), GFP_KERNEL
);
2185 for (; i
< npages
; i
++) {
2186 pages
[i
] = alloc_page(GFP_KERNEL
|__GFP_HIGHMEM
);
2193 /* read read data into pages */
2194 rc
= read_data_into_pages(server
, pages
, npages
, len
);
2198 rc
= cifs_discard_remaining_data(server
);
2202 rc
= decrypt_raw_data(server
, buf
, server
->vals
->read_rsp_size
- 4,
2203 pages
, npages
, len
);
2207 *mid
= smb2_find_mid(server
, buf
);
2209 cifs_dbg(FYI
, "mid not found\n");
2211 cifs_dbg(FYI
, "mid found\n");
2212 (*mid
)->decrypted
= true;
2213 rc
= handle_read_data(server
, *mid
, buf
,
2214 server
->vals
->read_rsp_size
,
2215 pages
, npages
, len
);
2219 for (i
= i
- 1; i
>= 0; i
--)
2224 cifs_discard_remaining_data(server
);
2229 receive_encrypted_standard(struct TCP_Server_Info
*server
,
2230 struct mid_q_entry
**mid
)
2233 char *buf
= server
->smallbuf
;
2234 unsigned int pdu_length
= get_rfc1002_length(buf
);
2235 unsigned int buf_size
;
2236 struct mid_q_entry
*mid_entry
;
2238 /* switch to large buffer if too big for a small one */
2239 if (pdu_length
+ 4 > MAX_CIFS_SMALL_BUFFER_SIZE
) {
2240 server
->large_buf
= true;
2241 memcpy(server
->bigbuf
, buf
, server
->total_read
);
2242 buf
= server
->bigbuf
;
2245 /* now read the rest */
2246 length
= cifs_read_from_socket(server
, buf
+ HEADER_SIZE(server
) - 1,
2247 pdu_length
- HEADER_SIZE(server
) + 1 + 4);
2250 server
->total_read
+= length
;
2252 buf_size
= pdu_length
+ 4 - sizeof(struct smb2_transform_hdr
);
2253 length
= decrypt_raw_data(server
, buf
, buf_size
, NULL
, 0, 0);
2257 mid_entry
= smb2_find_mid(server
, buf
);
2258 if (mid_entry
== NULL
)
2259 cifs_dbg(FYI
, "mid not found\n");
2261 cifs_dbg(FYI
, "mid found\n");
2262 mid_entry
->decrypted
= true;
2267 if (mid_entry
&& mid_entry
->handle
)
2268 return mid_entry
->handle(server
, mid_entry
);
2270 return cifs_handle_standard(server
, mid_entry
);
2274 smb3_receive_transform(struct TCP_Server_Info
*server
, struct mid_q_entry
**mid
)
2276 char *buf
= server
->smallbuf
;
2277 unsigned int pdu_length
= get_rfc1002_length(buf
);
2278 struct smb2_transform_hdr
*tr_hdr
= (struct smb2_transform_hdr
*)buf
;
2279 unsigned int orig_len
= le32_to_cpu(tr_hdr
->OriginalMessageSize
);
2281 if (pdu_length
+ 4 < sizeof(struct smb2_transform_hdr
) +
2282 sizeof(struct smb2_sync_hdr
)) {
2283 cifs_dbg(VFS
, "Transform message is too small (%u)\n",
2285 cifs_reconnect(server
);
2286 wake_up(&server
->response_q
);
2287 return -ECONNABORTED
;
2290 if (pdu_length
+ 4 < orig_len
+ sizeof(struct smb2_transform_hdr
)) {
2291 cifs_dbg(VFS
, "Transform message is broken\n");
2292 cifs_reconnect(server
);
2293 wake_up(&server
->response_q
);
2294 return -ECONNABORTED
;
2297 if (pdu_length
+ 4 > CIFSMaxBufSize
+ MAX_HEADER_SIZE(server
))
2298 return receive_encrypted_read(server
, mid
);
2300 return receive_encrypted_standard(server
, mid
);
2304 smb3_handle_read_data(struct TCP_Server_Info
*server
, struct mid_q_entry
*mid
)
2306 char *buf
= server
->large_buf
? server
->bigbuf
: server
->smallbuf
;
2308 return handle_read_data(server
, mid
, buf
, get_rfc1002_length(buf
) + 4,
2312 struct smb_version_operations smb20_operations
= {
2313 .compare_fids
= smb2_compare_fids
,
2314 .setup_request
= smb2_setup_request
,
2315 .setup_async_request
= smb2_setup_async_request
,
2316 .check_receive
= smb2_check_receive
,
2317 .add_credits
= smb2_add_credits
,
2318 .set_credits
= smb2_set_credits
,
2319 .get_credits_field
= smb2_get_credits_field
,
2320 .get_credits
= smb2_get_credits
,
2321 .wait_mtu_credits
= cifs_wait_mtu_credits
,
2322 .get_next_mid
= smb2_get_next_mid
,
2323 .read_data_offset
= smb2_read_data_offset
,
2324 .read_data_length
= smb2_read_data_length
,
2325 .map_error
= map_smb2_to_linux_error
,
2326 .find_mid
= smb2_find_mid
,
2327 .check_message
= smb2_check_message
,
2328 .dump_detail
= smb2_dump_detail
,
2329 .clear_stats
= smb2_clear_stats
,
2330 .print_stats
= smb2_print_stats
,
2331 .is_oplock_break
= smb2_is_valid_oplock_break
,
2332 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
2333 .downgrade_oplock
= smb2_downgrade_oplock
,
2334 .need_neg
= smb2_need_neg
,
2335 .negotiate
= smb2_negotiate
,
2336 .negotiate_wsize
= smb2_negotiate_wsize
,
2337 .negotiate_rsize
= smb2_negotiate_rsize
,
2338 .sess_setup
= SMB2_sess_setup
,
2339 .logoff
= SMB2_logoff
,
2340 .tree_connect
= SMB2_tcon
,
2341 .tree_disconnect
= SMB2_tdis
,
2342 .qfs_tcon
= smb2_qfs_tcon
,
2343 .is_path_accessible
= smb2_is_path_accessible
,
2344 .can_echo
= smb2_can_echo
,
2346 .query_path_info
= smb2_query_path_info
,
2347 .get_srv_inum
= smb2_get_srv_inum
,
2348 .query_file_info
= smb2_query_file_info
,
2349 .set_path_size
= smb2_set_path_size
,
2350 .set_file_size
= smb2_set_file_size
,
2351 .set_file_info
= smb2_set_file_info
,
2352 .set_compression
= smb2_set_compression
,
2353 .mkdir
= smb2_mkdir
,
2354 .mkdir_setinfo
= smb2_mkdir_setinfo
,
2355 .rmdir
= smb2_rmdir
,
2356 .unlink
= smb2_unlink
,
2357 .rename
= smb2_rename_path
,
2358 .create_hardlink
= smb2_create_hardlink
,
2359 .query_symlink
= smb2_query_symlink
,
2360 .query_mf_symlink
= smb3_query_mf_symlink
,
2361 .create_mf_symlink
= smb3_create_mf_symlink
,
2362 .open
= smb2_open_file
,
2363 .set_fid
= smb2_set_fid
,
2364 .close
= smb2_close_file
,
2365 .flush
= smb2_flush_file
,
2366 .async_readv
= smb2_async_readv
,
2367 .async_writev
= smb2_async_writev
,
2368 .sync_read
= smb2_sync_read
,
2369 .sync_write
= smb2_sync_write
,
2370 .query_dir_first
= smb2_query_dir_first
,
2371 .query_dir_next
= smb2_query_dir_next
,
2372 .close_dir
= smb2_close_dir
,
2373 .calc_smb_size
= smb2_calc_size
,
2374 .is_status_pending
= smb2_is_status_pending
,
2375 .oplock_response
= smb2_oplock_response
,
2376 .queryfs
= smb2_queryfs
,
2377 .mand_lock
= smb2_mand_lock
,
2378 .mand_unlock_range
= smb2_unlock_range
,
2379 .push_mand_locks
= smb2_push_mandatory_locks
,
2380 .get_lease_key
= smb2_get_lease_key
,
2381 .set_lease_key
= smb2_set_lease_key
,
2382 .new_lease_key
= smb2_new_lease_key
,
2383 .calc_signature
= smb2_calc_signature
,
2384 .is_read_op
= smb2_is_read_op
,
2385 .set_oplock_level
= smb2_set_oplock_level
,
2386 .create_lease_buf
= smb2_create_lease_buf
,
2387 .parse_lease_buf
= smb2_parse_lease_buf
,
2388 .copychunk_range
= smb2_copychunk_range
,
2389 .wp_retry_size
= smb2_wp_retry_size
,
2390 .dir_needs_close
= smb2_dir_needs_close
,
2391 .get_dfs_refer
= smb2_get_dfs_refer
,
2392 .select_sectype
= smb2_select_sectype
,
2395 struct smb_version_operations smb21_operations
= {
2396 .compare_fids
= smb2_compare_fids
,
2397 .setup_request
= smb2_setup_request
,
2398 .setup_async_request
= smb2_setup_async_request
,
2399 .check_receive
= smb2_check_receive
,
2400 .add_credits
= smb2_add_credits
,
2401 .set_credits
= smb2_set_credits
,
2402 .get_credits_field
= smb2_get_credits_field
,
2403 .get_credits
= smb2_get_credits
,
2404 .wait_mtu_credits
= smb2_wait_mtu_credits
,
2405 .get_next_mid
= smb2_get_next_mid
,
2406 .read_data_offset
= smb2_read_data_offset
,
2407 .read_data_length
= smb2_read_data_length
,
2408 .map_error
= map_smb2_to_linux_error
,
2409 .find_mid
= smb2_find_mid
,
2410 .check_message
= smb2_check_message
,
2411 .dump_detail
= smb2_dump_detail
,
2412 .clear_stats
= smb2_clear_stats
,
2413 .print_stats
= smb2_print_stats
,
2414 .is_oplock_break
= smb2_is_valid_oplock_break
,
2415 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
2416 .downgrade_oplock
= smb2_downgrade_oplock
,
2417 .need_neg
= smb2_need_neg
,
2418 .negotiate
= smb2_negotiate
,
2419 .negotiate_wsize
= smb2_negotiate_wsize
,
2420 .negotiate_rsize
= smb2_negotiate_rsize
,
2421 .sess_setup
= SMB2_sess_setup
,
2422 .logoff
= SMB2_logoff
,
2423 .tree_connect
= SMB2_tcon
,
2424 .tree_disconnect
= SMB2_tdis
,
2425 .qfs_tcon
= smb2_qfs_tcon
,
2426 .is_path_accessible
= smb2_is_path_accessible
,
2427 .can_echo
= smb2_can_echo
,
2429 .query_path_info
= smb2_query_path_info
,
2430 .get_srv_inum
= smb2_get_srv_inum
,
2431 .query_file_info
= smb2_query_file_info
,
2432 .set_path_size
= smb2_set_path_size
,
2433 .set_file_size
= smb2_set_file_size
,
2434 .set_file_info
= smb2_set_file_info
,
2435 .set_compression
= smb2_set_compression
,
2436 .mkdir
= smb2_mkdir
,
2437 .mkdir_setinfo
= smb2_mkdir_setinfo
,
2438 .rmdir
= smb2_rmdir
,
2439 .unlink
= smb2_unlink
,
2440 .rename
= smb2_rename_path
,
2441 .create_hardlink
= smb2_create_hardlink
,
2442 .query_symlink
= smb2_query_symlink
,
2443 .query_mf_symlink
= smb3_query_mf_symlink
,
2444 .create_mf_symlink
= smb3_create_mf_symlink
,
2445 .open
= smb2_open_file
,
2446 .set_fid
= smb2_set_fid
,
2447 .close
= smb2_close_file
,
2448 .flush
= smb2_flush_file
,
2449 .async_readv
= smb2_async_readv
,
2450 .async_writev
= smb2_async_writev
,
2451 .sync_read
= smb2_sync_read
,
2452 .sync_write
= smb2_sync_write
,
2453 .query_dir_first
= smb2_query_dir_first
,
2454 .query_dir_next
= smb2_query_dir_next
,
2455 .close_dir
= smb2_close_dir
,
2456 .calc_smb_size
= smb2_calc_size
,
2457 .is_status_pending
= smb2_is_status_pending
,
2458 .oplock_response
= smb2_oplock_response
,
2459 .queryfs
= smb2_queryfs
,
2460 .mand_lock
= smb2_mand_lock
,
2461 .mand_unlock_range
= smb2_unlock_range
,
2462 .push_mand_locks
= smb2_push_mandatory_locks
,
2463 .get_lease_key
= smb2_get_lease_key
,
2464 .set_lease_key
= smb2_set_lease_key
,
2465 .new_lease_key
= smb2_new_lease_key
,
2466 .calc_signature
= smb2_calc_signature
,
2467 .is_read_op
= smb21_is_read_op
,
2468 .set_oplock_level
= smb21_set_oplock_level
,
2469 .create_lease_buf
= smb2_create_lease_buf
,
2470 .parse_lease_buf
= smb2_parse_lease_buf
,
2471 .copychunk_range
= smb2_copychunk_range
,
2472 .wp_retry_size
= smb2_wp_retry_size
,
2473 .dir_needs_close
= smb2_dir_needs_close
,
2474 .enum_snapshots
= smb3_enum_snapshots
,
2475 .get_dfs_refer
= smb2_get_dfs_refer
,
2476 .select_sectype
= smb2_select_sectype
,
2479 struct smb_version_operations smb30_operations
= {
2480 .compare_fids
= smb2_compare_fids
,
2481 .setup_request
= smb2_setup_request
,
2482 .setup_async_request
= smb2_setup_async_request
,
2483 .check_receive
= smb2_check_receive
,
2484 .add_credits
= smb2_add_credits
,
2485 .set_credits
= smb2_set_credits
,
2486 .get_credits_field
= smb2_get_credits_field
,
2487 .get_credits
= smb2_get_credits
,
2488 .wait_mtu_credits
= smb2_wait_mtu_credits
,
2489 .get_next_mid
= smb2_get_next_mid
,
2490 .read_data_offset
= smb2_read_data_offset
,
2491 .read_data_length
= smb2_read_data_length
,
2492 .map_error
= map_smb2_to_linux_error
,
2493 .find_mid
= smb2_find_mid
,
2494 .check_message
= smb2_check_message
,
2495 .dump_detail
= smb2_dump_detail
,
2496 .clear_stats
= smb2_clear_stats
,
2497 .print_stats
= smb2_print_stats
,
2498 .dump_share_caps
= smb2_dump_share_caps
,
2499 .is_oplock_break
= smb2_is_valid_oplock_break
,
2500 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
2501 .downgrade_oplock
= smb2_downgrade_oplock
,
2502 .need_neg
= smb2_need_neg
,
2503 .negotiate
= smb2_negotiate
,
2504 .negotiate_wsize
= smb2_negotiate_wsize
,
2505 .negotiate_rsize
= smb2_negotiate_rsize
,
2506 .sess_setup
= SMB2_sess_setup
,
2507 .logoff
= SMB2_logoff
,
2508 .tree_connect
= SMB2_tcon
,
2509 .tree_disconnect
= SMB2_tdis
,
2510 .qfs_tcon
= smb3_qfs_tcon
,
2511 .is_path_accessible
= smb2_is_path_accessible
,
2512 .can_echo
= smb2_can_echo
,
2514 .query_path_info
= smb2_query_path_info
,
2515 .get_srv_inum
= smb2_get_srv_inum
,
2516 .query_file_info
= smb2_query_file_info
,
2517 .set_path_size
= smb2_set_path_size
,
2518 .set_file_size
= smb2_set_file_size
,
2519 .set_file_info
= smb2_set_file_info
,
2520 .set_compression
= smb2_set_compression
,
2521 .mkdir
= smb2_mkdir
,
2522 .mkdir_setinfo
= smb2_mkdir_setinfo
,
2523 .rmdir
= smb2_rmdir
,
2524 .unlink
= smb2_unlink
,
2525 .rename
= smb2_rename_path
,
2526 .create_hardlink
= smb2_create_hardlink
,
2527 .query_symlink
= smb2_query_symlink
,
2528 .query_mf_symlink
= smb3_query_mf_symlink
,
2529 .create_mf_symlink
= smb3_create_mf_symlink
,
2530 .open
= smb2_open_file
,
2531 .set_fid
= smb2_set_fid
,
2532 .close
= smb2_close_file
,
2533 .flush
= smb2_flush_file
,
2534 .async_readv
= smb2_async_readv
,
2535 .async_writev
= smb2_async_writev
,
2536 .sync_read
= smb2_sync_read
,
2537 .sync_write
= smb2_sync_write
,
2538 .query_dir_first
= smb2_query_dir_first
,
2539 .query_dir_next
= smb2_query_dir_next
,
2540 .close_dir
= smb2_close_dir
,
2541 .calc_smb_size
= smb2_calc_size
,
2542 .is_status_pending
= smb2_is_status_pending
,
2543 .oplock_response
= smb2_oplock_response
,
2544 .queryfs
= smb2_queryfs
,
2545 .mand_lock
= smb2_mand_lock
,
2546 .mand_unlock_range
= smb2_unlock_range
,
2547 .push_mand_locks
= smb2_push_mandatory_locks
,
2548 .get_lease_key
= smb2_get_lease_key
,
2549 .set_lease_key
= smb2_set_lease_key
,
2550 .new_lease_key
= smb2_new_lease_key
,
2551 .generate_signingkey
= generate_smb30signingkey
,
2552 .calc_signature
= smb3_calc_signature
,
2553 .set_integrity
= smb3_set_integrity
,
2554 .is_read_op
= smb21_is_read_op
,
2555 .set_oplock_level
= smb3_set_oplock_level
,
2556 .create_lease_buf
= smb3_create_lease_buf
,
2557 .parse_lease_buf
= smb3_parse_lease_buf
,
2558 .copychunk_range
= smb2_copychunk_range
,
2559 .duplicate_extents
= smb2_duplicate_extents
,
2560 .validate_negotiate
= smb3_validate_negotiate
,
2561 .wp_retry_size
= smb2_wp_retry_size
,
2562 .dir_needs_close
= smb2_dir_needs_close
,
2563 .fallocate
= smb3_fallocate
,
2564 .enum_snapshots
= smb3_enum_snapshots
,
2565 .init_transform_rq
= smb3_init_transform_rq
,
2566 .free_transform_rq
= smb3_free_transform_rq
,
2567 .is_transform_hdr
= smb3_is_transform_hdr
,
2568 .receive_transform
= smb3_receive_transform
,
2569 .get_dfs_refer
= smb2_get_dfs_refer
,
2570 .select_sectype
= smb2_select_sectype
,
2573 #ifdef CONFIG_CIFS_SMB311
2574 struct smb_version_operations smb311_operations
= {
2575 .compare_fids
= smb2_compare_fids
,
2576 .setup_request
= smb2_setup_request
,
2577 .setup_async_request
= smb2_setup_async_request
,
2578 .check_receive
= smb2_check_receive
,
2579 .add_credits
= smb2_add_credits
,
2580 .set_credits
= smb2_set_credits
,
2581 .get_credits_field
= smb2_get_credits_field
,
2582 .get_credits
= smb2_get_credits
,
2583 .wait_mtu_credits
= smb2_wait_mtu_credits
,
2584 .get_next_mid
= smb2_get_next_mid
,
2585 .read_data_offset
= smb2_read_data_offset
,
2586 .read_data_length
= smb2_read_data_length
,
2587 .map_error
= map_smb2_to_linux_error
,
2588 .find_mid
= smb2_find_mid
,
2589 .check_message
= smb2_check_message
,
2590 .dump_detail
= smb2_dump_detail
,
2591 .clear_stats
= smb2_clear_stats
,
2592 .print_stats
= smb2_print_stats
,
2593 .dump_share_caps
= smb2_dump_share_caps
,
2594 .is_oplock_break
= smb2_is_valid_oplock_break
,
2595 .handle_cancelled_mid
= smb2_handle_cancelled_mid
,
2596 .downgrade_oplock
= smb2_downgrade_oplock
,
2597 .need_neg
= smb2_need_neg
,
2598 .negotiate
= smb2_negotiate
,
2599 .negotiate_wsize
= smb2_negotiate_wsize
,
2600 .negotiate_rsize
= smb2_negotiate_rsize
,
2601 .sess_setup
= SMB2_sess_setup
,
2602 .logoff
= SMB2_logoff
,
2603 .tree_connect
= SMB2_tcon
,
2604 .tree_disconnect
= SMB2_tdis
,
2605 .qfs_tcon
= smb3_qfs_tcon
,
2606 .is_path_accessible
= smb2_is_path_accessible
,
2607 .can_echo
= smb2_can_echo
,
2609 .query_path_info
= smb2_query_path_info
,
2610 .get_srv_inum
= smb2_get_srv_inum
,
2611 .query_file_info
= smb2_query_file_info
,
2612 .set_path_size
= smb2_set_path_size
,
2613 .set_file_size
= smb2_set_file_size
,
2614 .set_file_info
= smb2_set_file_info
,
2615 .set_compression
= smb2_set_compression
,
2616 .mkdir
= smb2_mkdir
,
2617 .mkdir_setinfo
= smb2_mkdir_setinfo
,
2618 .rmdir
= smb2_rmdir
,
2619 .unlink
= smb2_unlink
,
2620 .rename
= smb2_rename_path
,
2621 .create_hardlink
= smb2_create_hardlink
,
2622 .query_symlink
= smb2_query_symlink
,
2623 .query_mf_symlink
= smb3_query_mf_symlink
,
2624 .create_mf_symlink
= smb3_create_mf_symlink
,
2625 .open
= smb2_open_file
,
2626 .set_fid
= smb2_set_fid
,
2627 .close
= smb2_close_file
,
2628 .flush
= smb2_flush_file
,
2629 .async_readv
= smb2_async_readv
,
2630 .async_writev
= smb2_async_writev
,
2631 .sync_read
= smb2_sync_read
,
2632 .sync_write
= smb2_sync_write
,
2633 .query_dir_first
= smb2_query_dir_first
,
2634 .query_dir_next
= smb2_query_dir_next
,
2635 .close_dir
= smb2_close_dir
,
2636 .calc_smb_size
= smb2_calc_size
,
2637 .is_status_pending
= smb2_is_status_pending
,
2638 .oplock_response
= smb2_oplock_response
,
2639 .queryfs
= smb2_queryfs
,
2640 .mand_lock
= smb2_mand_lock
,
2641 .mand_unlock_range
= smb2_unlock_range
,
2642 .push_mand_locks
= smb2_push_mandatory_locks
,
2643 .get_lease_key
= smb2_get_lease_key
,
2644 .set_lease_key
= smb2_set_lease_key
,
2645 .new_lease_key
= smb2_new_lease_key
,
2646 .generate_signingkey
= generate_smb311signingkey
,
2647 .calc_signature
= smb3_calc_signature
,
2648 .set_integrity
= smb3_set_integrity
,
2649 .is_read_op
= smb21_is_read_op
,
2650 .set_oplock_level
= smb3_set_oplock_level
,
2651 .create_lease_buf
= smb3_create_lease_buf
,
2652 .parse_lease_buf
= smb3_parse_lease_buf
,
2653 .copychunk_range
= smb2_copychunk_range
,
2654 .duplicate_extents
= smb2_duplicate_extents
,
2655 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
2656 .wp_retry_size
= smb2_wp_retry_size
,
2657 .dir_needs_close
= smb2_dir_needs_close
,
2658 .fallocate
= smb3_fallocate
,
2659 .enum_snapshots
= smb3_enum_snapshots
,
2660 .init_transform_rq
= smb3_init_transform_rq
,
2661 .free_transform_rq
= smb3_free_transform_rq
,
2662 .is_transform_hdr
= smb3_is_transform_hdr
,
2663 .receive_transform
= smb3_receive_transform
,
2664 .get_dfs_refer
= smb2_get_dfs_refer
,
2665 .select_sectype
= smb2_select_sectype
,
2667 #endif /* CIFS_SMB311 */
2669 struct smb_version_values smb20_values
= {
2670 .version_string
= SMB20_VERSION_STRING
,
2671 .protocol_id
= SMB20_PROT_ID
,
2672 .req_capabilities
= 0, /* MBZ */
2673 .large_lock_type
= 0,
2674 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
2675 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
2676 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
2677 .header_size
= sizeof(struct smb2_hdr
),
2678 .max_header_size
= MAX_SMB2_HDR_SIZE
,
2679 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
2680 .lock_cmd
= SMB2_LOCK
,
2682 .cap_nt_find
= SMB2_NT_FIND
,
2683 .cap_large_files
= SMB2_LARGE_FILES
,
2684 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2685 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2686 .create_lease_size
= sizeof(struct create_lease
),
2689 struct smb_version_values smb21_values
= {
2690 .version_string
= SMB21_VERSION_STRING
,
2691 .protocol_id
= SMB21_PROT_ID
,
2692 .req_capabilities
= 0, /* MBZ on negotiate req until SMB3 dialect */
2693 .large_lock_type
= 0,
2694 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
2695 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
2696 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
2697 .header_size
= sizeof(struct smb2_hdr
),
2698 .max_header_size
= MAX_SMB2_HDR_SIZE
,
2699 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
2700 .lock_cmd
= SMB2_LOCK
,
2702 .cap_nt_find
= SMB2_NT_FIND
,
2703 .cap_large_files
= SMB2_LARGE_FILES
,
2704 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2705 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2706 .create_lease_size
= sizeof(struct create_lease
),
2709 struct smb_version_values smb30_values
= {
2710 .version_string
= SMB30_VERSION_STRING
,
2711 .protocol_id
= SMB30_PROT_ID
,
2712 .req_capabilities
= SMB2_GLOBAL_CAP_DFS
| SMB2_GLOBAL_CAP_LEASING
| SMB2_GLOBAL_CAP_LARGE_MTU
| SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
| SMB2_GLOBAL_CAP_ENCRYPTION
,
2713 .large_lock_type
= 0,
2714 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
2715 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
2716 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
2717 .header_size
= sizeof(struct smb2_hdr
),
2718 .max_header_size
= MAX_SMB2_HDR_SIZE
,
2719 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
2720 .lock_cmd
= SMB2_LOCK
,
2722 .cap_nt_find
= SMB2_NT_FIND
,
2723 .cap_large_files
= SMB2_LARGE_FILES
,
2724 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2725 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2726 .create_lease_size
= sizeof(struct create_lease_v2
),
2729 struct smb_version_values smb302_values
= {
2730 .version_string
= SMB302_VERSION_STRING
,
2731 .protocol_id
= SMB302_PROT_ID
,
2732 .req_capabilities
= SMB2_GLOBAL_CAP_DFS
| SMB2_GLOBAL_CAP_LEASING
| SMB2_GLOBAL_CAP_LARGE_MTU
| SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
| SMB2_GLOBAL_CAP_ENCRYPTION
,
2733 .large_lock_type
= 0,
2734 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
2735 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
2736 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
2737 .header_size
= sizeof(struct smb2_hdr
),
2738 .max_header_size
= MAX_SMB2_HDR_SIZE
,
2739 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
2740 .lock_cmd
= SMB2_LOCK
,
2742 .cap_nt_find
= SMB2_NT_FIND
,
2743 .cap_large_files
= SMB2_LARGE_FILES
,
2744 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2745 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2746 .create_lease_size
= sizeof(struct create_lease_v2
),
2749 #ifdef CONFIG_CIFS_SMB311
2750 struct smb_version_values smb311_values
= {
2751 .version_string
= SMB311_VERSION_STRING
,
2752 .protocol_id
= SMB311_PROT_ID
,
2753 .req_capabilities
= SMB2_GLOBAL_CAP_DFS
| SMB2_GLOBAL_CAP_LEASING
| SMB2_GLOBAL_CAP_LARGE_MTU
| SMB2_GLOBAL_CAP_PERSISTENT_HANDLES
,
2754 .large_lock_type
= 0,
2755 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
2756 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
2757 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
2758 .header_size
= sizeof(struct smb2_hdr
),
2759 .max_header_size
= MAX_SMB2_HDR_SIZE
,
2760 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
2761 .lock_cmd
= SMB2_LOCK
,
2763 .cap_nt_find
= SMB2_NT_FIND
,
2764 .cap_large_files
= SMB2_LARGE_FILES
,
2765 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2766 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
2767 .create_lease_size
= sizeof(struct create_lease_v2
),