forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 1
/
smb2ops.c
1653 lines (1479 loc) · 48.6 KB
/
smb2ops.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* SMB2 version specific operations
*
* Copyright (c) 2012, Jeff Layton <[email protected]>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published
* by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/pagemap.h>
#include <linux/vfs.h>
#include <linux/falloc.h>
#include "cifsglob.h"
#include "smb2pdu.h"
#include "smb2proto.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_unicode.h"
#include "smb2status.h"
#include "smb2glob.h"
static int
change_conf(struct TCP_Server_Info *server)
{
server->credits += server->echo_credits + server->oplock_credits;
server->oplock_credits = server->echo_credits = 0;
switch (server->credits) {
case 0:
return -1;
case 1:
server->echoes = false;
server->oplocks = false;
cifs_dbg(VFS, "disabling echoes and oplocks\n");
break;
case 2:
server->echoes = true;
server->oplocks = false;
server->echo_credits = 1;
cifs_dbg(FYI, "disabling oplocks\n");
break;
default:
server->echoes = true;
server->oplocks = true;
server->echo_credits = 1;
server->oplock_credits = 1;
}
server->credits -= server->echo_credits + server->oplock_credits;
return 0;
}
static void
smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
const int optype)
{
int *val, rc = 0;
spin_lock(&server->req_lock);
val = server->ops->get_credits_field(server, optype);
*val += add;
server->in_flight--;
if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
rc = change_conf(server);
/*
* Sometimes server returns 0 credits on oplock break ack - we need to
* rebalance credits in this case.
*/
else if (server->in_flight > 0 && server->oplock_credits == 0 &&
server->oplocks) {
if (server->credits > 1) {
server->credits--;
server->oplock_credits++;
}
}
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
if (rc)
cifs_reconnect(server);
}
static void
smb2_set_credits(struct TCP_Server_Info *server, const int val)
{
spin_lock(&server->req_lock);
server->credits = val;
spin_unlock(&server->req_lock);
}
static int *
smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
{
switch (optype) {
case CIFS_ECHO_OP:
return &server->echo_credits;
case CIFS_OBREAK_OP:
return &server->oplock_credits;
default:
return &server->credits;
}
}
static unsigned int
smb2_get_credits(struct mid_q_entry *mid)
{
return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
}
static int
smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
unsigned int *num, unsigned int *credits)
{
int rc = 0;
unsigned int scredits;
spin_lock(&server->req_lock);
while (1) {
if (server->credits <= 0) {
spin_unlock(&server->req_lock);
cifs_num_waiters_inc(server);
rc = wait_event_killable(server->request_q,
has_credits(server, &server->credits));
cifs_num_waiters_dec(server);
if (rc)
return rc;
spin_lock(&server->req_lock);
} else {
if (server->tcpStatus == CifsExiting) {
spin_unlock(&server->req_lock);
return -ENOENT;
}
scredits = server->credits;
/* can deadlock with reopen */
if (scredits == 1) {
*num = SMB2_MAX_BUFFER_SIZE;
*credits = 0;
break;
}
/* leave one credit for a possible reopen */
scredits--;
*num = min_t(unsigned int, size,
scredits * SMB2_MAX_BUFFER_SIZE);
*credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
server->credits -= *credits;
server->in_flight++;
break;
}
}
spin_unlock(&server->req_lock);
return rc;
}
static __u64
smb2_get_next_mid(struct TCP_Server_Info *server)
{
__u64 mid;
/* for SMB2 we need the current value */
spin_lock(&GlobalMid_Lock);
mid = server->CurrentMid++;
spin_unlock(&GlobalMid_Lock);
return mid;
}
static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info *server, char *buf)
{
struct mid_q_entry *mid;
struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
spin_lock(&GlobalMid_Lock);
list_for_each_entry(mid, &server->pending_mid_q, qhead) {
if ((mid->mid == hdr->MessageId) &&
(mid->mid_state == MID_REQUEST_SUBMITTED) &&
(mid->command == hdr->Command)) {
spin_unlock(&GlobalMid_Lock);
return mid;
}
}
spin_unlock(&GlobalMid_Lock);
return NULL;
}
static void
smb2_dump_detail(void *buf)
{
#ifdef CONFIG_CIFS_DEBUG2
struct smb2_hdr *smb = (struct smb2_hdr *)buf;
cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
smb->Command, smb->Status, smb->Flags, smb->MessageId,
smb->ProcessId);
cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
#endif
}
static bool
smb2_need_neg(struct TCP_Server_Info *server)
{
return server->max_read == 0;
}
static int
smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
{
int rc;
ses->server->CurrentMid = 0;
rc = SMB2_negotiate(xid, ses);
/* BB we probably don't need to retry with modern servers */
if (rc == -EAGAIN)
rc = -EHOSTDOWN;
return rc;
}
static unsigned int
smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int wsize;
/* start with specified wsize, or default */
wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
wsize = min_t(unsigned int, wsize, server->max_write);
if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
return wsize;
}
static unsigned int
smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
{
struct TCP_Server_Info *server = tcon->ses->server;
unsigned int rsize;
/* start with specified rsize, or default */
rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
rsize = min_t(unsigned int, rsize, server->max_read);
if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
return rsize;
}
#ifdef CONFIG_CIFS_STATS2
static int
SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
{
int rc;
unsigned int ret_data_len = 0;
struct network_interface_info_ioctl_rsp *out_buf;
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
NULL /* no data input */, 0 /* no data input */,
(char **)&out_buf, &ret_data_len);
if (rc != 0)
cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
cifs_dbg(VFS, "server returned bad net interface info buf\n");
rc = -EINVAL;
} else {
/* Dump info on first interface */
cifs_dbg(FYI, "Adapter Capability 0x%x\t",
le32_to_cpu(out_buf->Capability));
cifs_dbg(FYI, "Link Speed %lld\n",
le64_to_cpu(out_buf->LinkSpeed));
}
return rc;
}
#endif /* STATS2 */
static void
smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
if (rc)
return;
#ifdef CONFIG_CIFS_STATS2
SMB3_request_interfaces(xid, tcon);
#endif /* STATS2 */
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_ATTRIBUTE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_DEVICE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return;
}
static void
smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
if (rc)
return;
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_ATTRIBUTE_INFORMATION);
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
FS_DEVICE_INFORMATION);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return;
}
static int
smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path)
{
int rc;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
if (rc) {
kfree(utf16_path);
return rc;
}
rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
kfree(utf16_path);
return rc;
}
static int
smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
u64 *uniqueid, FILE_ALL_INFO *data)
{
*uniqueid = le64_to_cpu(data->IndexNumber);
return 0;
}
static int
smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid, FILE_ALL_INFO *data)
{
int rc;
struct smb2_file_all_info *smb2_data;
smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
GFP_KERNEL);
if (smb2_data == NULL)
return -ENOMEM;
rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
smb2_data);
if (!rc)
move_smb2_info_to_cifs(data, smb2_data);
kfree(smb2_data);
return rc;
}
static bool
smb2_can_echo(struct TCP_Server_Info *server)
{
return server->echoes;
}
static void
smb2_clear_stats(struct cifs_tcon *tcon)
{
#ifdef CONFIG_CIFS_STATS
int i;
for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
}
#endif
}
static void
smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
{
seq_puts(m, "\n\tShare Capabilities:");
if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
seq_puts(m, " DFS,");
if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
seq_puts(m, " CONTINUOUS AVAILABILITY,");
if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
seq_puts(m, " SCALEOUT,");
if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
seq_puts(m, " CLUSTER,");
if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
seq_puts(m, " ASYMMETRIC,");
if (tcon->capabilities == 0)
seq_puts(m, " None");
if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
seq_puts(m, " Aligned,");
if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
seq_puts(m, " Partition Aligned,");
if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
seq_puts(m, " SSD,");
if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
seq_puts(m, " TRIM-support,");
seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
if (tcon->perf_sector_size)
seq_printf(m, "\tOptimal sector size: 0x%x",
tcon->perf_sector_size);
}
static void
smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
{
#ifdef CONFIG_CIFS_STATS
atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
seq_printf(m, "\nNegotiates: %d sent %d failed",
atomic_read(&sent[SMB2_NEGOTIATE_HE]),
atomic_read(&failed[SMB2_NEGOTIATE_HE]));
seq_printf(m, "\nSessionSetups: %d sent %d failed",
atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
seq_printf(m, "\nLogoffs: %d sent %d failed",
atomic_read(&sent[SMB2_LOGOFF_HE]),
atomic_read(&failed[SMB2_LOGOFF_HE]));
seq_printf(m, "\nTreeConnects: %d sent %d failed",
atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
seq_printf(m, "\nCreates: %d sent %d failed",
atomic_read(&sent[SMB2_CREATE_HE]),
atomic_read(&failed[SMB2_CREATE_HE]));
seq_printf(m, "\nCloses: %d sent %d failed",
atomic_read(&sent[SMB2_CLOSE_HE]),
atomic_read(&failed[SMB2_CLOSE_HE]));
seq_printf(m, "\nFlushes: %d sent %d failed",
atomic_read(&sent[SMB2_FLUSH_HE]),
atomic_read(&failed[SMB2_FLUSH_HE]));
seq_printf(m, "\nReads: %d sent %d failed",
atomic_read(&sent[SMB2_READ_HE]),
atomic_read(&failed[SMB2_READ_HE]));
seq_printf(m, "\nWrites: %d sent %d failed",
atomic_read(&sent[SMB2_WRITE_HE]),
atomic_read(&failed[SMB2_WRITE_HE]));
seq_printf(m, "\nLocks: %d sent %d failed",
atomic_read(&sent[SMB2_LOCK_HE]),
atomic_read(&failed[SMB2_LOCK_HE]));
seq_printf(m, "\nIOCTLs: %d sent %d failed",
atomic_read(&sent[SMB2_IOCTL_HE]),
atomic_read(&failed[SMB2_IOCTL_HE]));
seq_printf(m, "\nCancels: %d sent %d failed",
atomic_read(&sent[SMB2_CANCEL_HE]),
atomic_read(&failed[SMB2_CANCEL_HE]));
seq_printf(m, "\nEchos: %d sent %d failed",
atomic_read(&sent[SMB2_ECHO_HE]),
atomic_read(&failed[SMB2_ECHO_HE]));
seq_printf(m, "\nQueryDirectories: %d sent %d failed",
atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
seq_printf(m, "\nChangeNotifies: %d sent %d failed",
atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
seq_printf(m, "\nQueryInfos: %d sent %d failed",
atomic_read(&sent[SMB2_QUERY_INFO_HE]),
atomic_read(&failed[SMB2_QUERY_INFO_HE]));
seq_printf(m, "\nSetInfos: %d sent %d failed",
atomic_read(&sent[SMB2_SET_INFO_HE]),
atomic_read(&failed[SMB2_SET_INFO_HE]));
seq_printf(m, "\nOplockBreaks: %d sent %d failed",
atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
#endif
}
static void
smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
{
struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
cfile->fid.persistent_fid = fid->persistent_fid;
cfile->fid.volatile_fid = fid->volatile_fid;
server->ops->set_oplock_level(cinode, oplock, fid->epoch,
&fid->purge_cache);
cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
}
static void
smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid)
{
SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
static int
SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid,
struct copychunk_ioctl *pcchunk)
{
int rc;
unsigned int ret_data_len;
struct resume_key_req *res_key;
rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
NULL, 0 /* no input */,
(char **)&res_key, &ret_data_len);
if (rc) {
cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
goto req_res_key_exit;
}
if (ret_data_len < sizeof(struct resume_key_req)) {
cifs_dbg(VFS, "Invalid refcopy resume key length\n");
rc = -EINVAL;
goto req_res_key_exit;
}
memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
req_res_key_exit:
kfree(res_key);
return rc;
}
static int
smb2_clone_range(const unsigned int xid,
struct cifsFileInfo *srcfile,
struct cifsFileInfo *trgtfile, u64 src_off,
u64 len, u64 dest_off)
{
int rc;
unsigned int ret_data_len;
struct copychunk_ioctl *pcchunk;
struct copychunk_ioctl_rsp *retbuf = NULL;
struct cifs_tcon *tcon;
int chunks_copied = 0;
bool chunk_sizes_updated = false;
pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
if (pcchunk == NULL)
return -ENOMEM;
cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
/* Request a key from the server to identify the source of the copy */
rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
srcfile->fid.persistent_fid,
srcfile->fid.volatile_fid, pcchunk);
/* Note: request_res_key sets res_key null only if rc !=0 */
if (rc)
goto cchunk_out;
/* For now array only one chunk long, will make more flexible later */
pcchunk->ChunkCount = __constant_cpu_to_le32(1);
pcchunk->Reserved = 0;
pcchunk->Reserved2 = 0;
tcon = tlink_tcon(trgtfile->tlink);
while (len > 0) {
pcchunk->SourceOffset = cpu_to_le64(src_off);
pcchunk->TargetOffset = cpu_to_le64(dest_off);
pcchunk->Length =
cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
/* Request server copy to target from src identified by key */
rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
true /* is_fsctl */, (char *)pcchunk,
sizeof(struct copychunk_ioctl), (char **)&retbuf,
&ret_data_len);
if (rc == 0) {
if (ret_data_len !=
sizeof(struct copychunk_ioctl_rsp)) {
cifs_dbg(VFS, "invalid cchunk response size\n");
rc = -EIO;
goto cchunk_out;
}
if (retbuf->TotalBytesWritten == 0) {
cifs_dbg(FYI, "no bytes copied\n");
rc = -EIO;
goto cchunk_out;
}
/*
* Check if server claimed to write more than we asked
*/
if (le32_to_cpu(retbuf->TotalBytesWritten) >
le32_to_cpu(pcchunk->Length)) {
cifs_dbg(VFS, "invalid copy chunk response\n");
rc = -EIO;
goto cchunk_out;
}
if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
cifs_dbg(VFS, "invalid num chunks written\n");
rc = -EIO;
goto cchunk_out;
}
chunks_copied++;
src_off += le32_to_cpu(retbuf->TotalBytesWritten);
dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
len -= le32_to_cpu(retbuf->TotalBytesWritten);
cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
le32_to_cpu(retbuf->ChunksWritten),
le32_to_cpu(retbuf->ChunkBytesWritten),
le32_to_cpu(retbuf->TotalBytesWritten));
} else if (rc == -EINVAL) {
if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
goto cchunk_out;
cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
le32_to_cpu(retbuf->ChunksWritten),
le32_to_cpu(retbuf->ChunkBytesWritten),
le32_to_cpu(retbuf->TotalBytesWritten));
/*
* Check if this is the first request using these sizes,
* (ie check if copy succeed once with original sizes
* and check if the server gave us different sizes after
* we already updated max sizes on previous request).
* if not then why is the server returning an error now
*/
if ((chunks_copied != 0) || chunk_sizes_updated)
goto cchunk_out;
/* Check that server is not asking us to grow size */
if (le32_to_cpu(retbuf->ChunkBytesWritten) <
tcon->max_bytes_chunk)
tcon->max_bytes_chunk =
le32_to_cpu(retbuf->ChunkBytesWritten);
else
goto cchunk_out; /* server gave us bogus size */
/* No need to change MaxChunks since already set to 1 */
chunk_sizes_updated = true;
}
}
cchunk_out:
kfree(pcchunk);
return rc;
}
static int
smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid)
{
return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
static unsigned int
smb2_read_data_offset(char *buf)
{
struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
return rsp->DataOffset;
}
static unsigned int
smb2_read_data_length(char *buf)
{
struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
return le32_to_cpu(rsp->DataLength);
}
static int
smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
struct cifs_io_parms *parms, unsigned int *bytes_read,
char **buf, int *buf_type)
{
parms->persistent_fid = pfid->persistent_fid;
parms->volatile_fid = pfid->volatile_fid;
return SMB2_read(xid, parms, bytes_read, buf, buf_type);
}
static int
smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
struct cifs_io_parms *parms, unsigned int *written,
struct kvec *iov, unsigned long nr_segs)
{
parms->persistent_fid = pfid->persistent_fid;
parms->volatile_fid = pfid->volatile_fid;
return SMB2_write(xid, parms, written, iov, nr_segs);
}
/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
{
struct cifsInodeInfo *cifsi;
int rc;
cifsi = CIFS_I(inode);
/* if file already sparse don't bother setting sparse again */
if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
return true; /* already sparse */
if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
return true; /* already not sparse */
/*
* Can't check for sparse support on share the usual way via the
* FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
* since Samba server doesn't set the flag on the share, yet
* supports the set sparse FSCTL and returns sparse correctly
* in the file attributes. If we fail setting sparse though we
* mark that server does not support sparse files for this share
* to avoid repeatedly sending the unsupported fsctl to server
* if the file is repeatedly extended.
*/
if (tcon->broken_sparse_sup)
return false;
rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
true /* is_fctl */, &setsparse, 1, NULL, NULL);
if (rc) {
tcon->broken_sparse_sup = true;
cifs_dbg(FYI, "set sparse rc = %d\n", rc);
return false;
}
if (setsparse)
cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
else
cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
return true;
}
static int
smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
{
__le64 eof = cpu_to_le64(size);
struct inode *inode;
/*
* If extending file more than one page make sparse. Many Linux fs
* make files sparse by default when extending via ftruncate
*/
inode = cfile->dentry->d_inode;
if (!set_alloc && (size > inode->i_size + 8192)) {
__u8 set_sparse = 1;
/* whether set sparse succeeds or not, extend the file */
smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
}
return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid, &eof, false);
}
static int
smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile)
{
return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid);
}
static int
smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
const char *path, struct cifs_sb_info *cifs_sb,
struct cifs_fid *fid, __u16 search_flags,
struct cifs_search_info *srch_inf)
{
__le16 *utf16_path;
int rc;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
kfree(utf16_path);
if (rc) {
cifs_dbg(VFS, "open dir failed\n");
return rc;
}
srch_inf->entries_in_buffer = 0;
srch_inf->index_of_last_entry = 0;
rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
fid->volatile_fid, 0, srch_inf);
if (rc) {
cifs_dbg(VFS, "query directory failed\n");
SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
return rc;
}
static int
smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid, __u16 search_flags,
struct cifs_search_info *srch_inf)
{
return SMB2_query_directory(xid, tcon, fid->persistent_fid,
fid->volatile_fid, 0, srch_inf);
}
static int
smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid)
{
return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
}
/*
* If we negotiate SMB2 protocol and get STATUS_PENDING - update
* the number of credits and return true. Otherwise - return false.
*/
static bool
smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
{
struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
if (hdr->Status != STATUS_PENDING)
return false;
if (!length) {
spin_lock(&server->req_lock);
server->credits += le16_to_cpu(hdr->CreditRequest);
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
}
return true;
}
static int
smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
struct cifsInodeInfo *cinode)
{
if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
return SMB2_lease_break(0, tcon, cinode->lease_key,
smb2_get_lease_state(cinode));
return SMB2_oplock_break(0, tcon, fid->persistent_fid,
fid->volatile_fid,
CIFS_CACHE_READ(cinode) ? 1 : 0);
}
static int
smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *buf)
{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
if (rc)
return rc;
buf->f_type = SMB2_MAGIC_NUMBER;
rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
buf);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return rc;
}
static bool
smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
{
return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
ob1->fid.volatile_fid == ob2->fid.volatile_fid;
}
static int
smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
__u64 length, __u32 type, int lock, int unlock, bool wait)
{
if (unlock && !lock)
type = SMB2_LOCKFLAG_UNLOCK;
return SMB2_lock(xid, tlink_tcon(cfile->tlink),
cfile->fid.persistent_fid, cfile->fid.volatile_fid,
current->tgid, length, offset, type, wait);
}
static void
smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
{
memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
}
static void
smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
{
memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
}
static void
smb2_new_lease_key(struct cifs_fid *fid)
{
get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
}
static int
smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
const char *full_path, char **target_path,
struct cifs_sb_info *cifs_sb)
{
int rc;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
struct smb2_err_rsp *err_buf = NULL;
struct smb2_symlink_err_rsp *symlink;
unsigned int sub_len, sub_offset;
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
if (!rc || !err_buf) {
kfree(utf16_path);