forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 4
/
super.c
1513 lines (1359 loc) · 43.2 KB
/
super.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
/*
* linux/fs/ufs/super.c
*
* Copyright (C) 1998
* Daniel Pirkl <[email protected]>
* Charles University, Faculty of Mathematics and Physics
*/
/* Derived from
*
* linux/fs/ext2/super.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card ([email protected])
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* from
*
* linux/fs/minix/inode.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* Big-endian to little-endian byte-swapping/bitmaps by
* David S. Miller ([email protected]), 1995
*/
/*
* Inspired by
*
* linux/fs/ufs/super.c
*
* Copyright (C) 1996
* Adrian Rodriguez ([email protected])
* Laboratory for Computer Science Research Computing Facility
* Rutgers, The State University of New Jersey
*
* Copyright (C) 1996 Eddie C. Dost ([email protected])
*
* Kernel module support added on 96/04/26 by
* Stefan Reinauer <[email protected]>
*
* Module usage counts added on 96/04/29 by
* Gertjan van Wingerde <[email protected]>
*
* Clean swab support on 19970406 by
* Francois-Rene Rideau <[email protected]>
*
* 4.4BSD (FreeBSD) support added on February 1st 1998 by
* Niels Kristian Bech Jensen <[email protected]> partially based
* on code by Martin von Loewis <[email protected]>.
*
* NeXTstep support added on February 5th 1998 by
* Niels Kristian Bech Jensen <[email protected]>.
*
* write support Daniel Pirkl <[email protected]> 1998
*
* HP/UX hfs filesystem support added by
* Martin K. Petersen <[email protected]>, August 1999
*
* UFS2 (of FreeBSD 5.x) support added by
* Niraj Kumar <[email protected]>, Jan 2004
*
* UFS2 write support added by
* Evgeniy Dushistov <[email protected]>, 2007
*/
#include <linux/exportfs.h>
#include <linux/module.h>
#include <linux/bitops.h>
#include <stdarg.h>
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/parser.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/log2.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include "ufs_fs.h"
#include "ufs.h"
#include "swab.h"
#include "util.h"
void lock_ufs(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
mutex_lock(&sbi->mutex);
sbi->mutex_owner = current;
}
void unlock_ufs(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
sbi->mutex_owner = NULL;
mutex_unlock(&sbi->mutex);
}
static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
{
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
struct inode *inode;
if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
return ERR_PTR(-ESTALE);
inode = ufs_iget(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {
iput(inode);
return ERR_PTR(-ESTALE);
}
return inode;
}
static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
}
static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type)
{
return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
}
static struct dentry *ufs_get_parent(struct dentry *child)
{
struct qstr dot_dot = QSTR_INIT("..", 2);
ino_t ino;
ino = ufs_inode_by_name(child->d_inode, &dot_dot);
if (!ino)
return ERR_PTR(-ENOENT);
return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
}
static const struct export_operations ufs_export_ops = {
.fh_to_dentry = ufs_fh_to_dentry,
.fh_to_parent = ufs_fh_to_parent,
.get_parent = ufs_get_parent,
};
#ifdef CONFIG_UFS_DEBUG
/*
* Print contents of ufs_super_block, useful for debugging
*/
static void ufs_print_super_stuff(struct super_block *sb,
struct ufs_super_block_first *usb1,
struct ufs_super_block_second *usb2,
struct ufs_super_block_third *usb3)
{
u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
pr_debug("ufs_print_super_stuff\n");
pr_debug(" magic: 0x%x\n", magic);
if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
pr_debug(" fs_size: %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
pr_debug(" fs_dsize: %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
pr_debug(" bsize: %u\n",
fs32_to_cpu(sb, usb1->fs_bsize));
pr_debug(" fsize: %u\n",
fs32_to_cpu(sb, usb1->fs_fsize));
pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
pr_debug(" fs_sblockloc: %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
pr_debug(" cs_nbfree(No of free blocks): %llu\n",
(unsigned long long)
fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
pr_info(" cs_nifree(Num of free inodes): %llu\n",
(unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
pr_info(" cs_nffree(Num of free frags): %llu\n",
(unsigned long long)
fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
pr_info(" fs_maxsymlinklen: %u\n",
fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
} else {
pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
pr_debug(" cgoffset: %u\n",
fs32_to_cpu(sb, usb1->fs_cgoffset));
pr_debug(" ~cgmask: 0x%x\n",
~fs32_to_cpu(sb, usb1->fs_cgmask));
pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
pr_debug(" fragshift: %u\n",
fs32_to_cpu(sb, usb1->fs_fragshift));
pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
pr_debug(" fstodb: %u\n",
fs32_to_cpu(sb, usb1->fs_fsbtodb));
pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
pr_debug(" ndir %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
pr_debug(" nifree %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
pr_debug(" nbfree %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
pr_debug(" nffree %u\n",
fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
}
pr_debug("\n");
}
/*
* Print contents of ufs_cylinder_group, useful for debugging
*/
static void ufs_print_cylinder_stuff(struct super_block *sb,
struct ufs_cylinder_group *cg)
{
pr_debug("\nufs_print_cylinder_stuff\n");
pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
pr_debug(" clustersumoff %u\n",
fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
pr_debug(" clusteroff %u\n",
fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
pr_debug(" nclusterblks %u\n",
fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
pr_debug("\n");
}
#else
# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
# define ufs_print_cylinder_stuff(sb, cg) /**/
#endif /* CONFIG_UFS_DEBUG */
static const struct super_operations ufs_super_ops;
void ufs_error (struct super_block * sb, const char * function,
const char * fmt, ...)
{
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct va_format vaf;
va_list args;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
if (!(sb->s_flags & MS_RDONLY)) {
usb1->fs_clean = UFS_FSBAD;
ubh_mark_buffer_dirty(USPI_UBH(uspi));
ufs_mark_sb_dirty(sb);
sb->s_flags |= MS_RDONLY;
}
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
case UFS_MOUNT_ONERROR_PANIC:
panic("panic (device %s): %s: %pV\n",
sb->s_id, function, &vaf);
case UFS_MOUNT_ONERROR_LOCK:
case UFS_MOUNT_ONERROR_UMOUNT:
case UFS_MOUNT_ONERROR_REPAIR:
pr_crit("error (device %s): %s: %pV\n",
sb->s_id, function, &vaf);
}
va_end(args);
}
void ufs_panic (struct super_block * sb, const char * function,
const char * fmt, ...)
{
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct va_format vaf;
va_list args;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
if (!(sb->s_flags & MS_RDONLY)) {
usb1->fs_clean = UFS_FSBAD;
ubh_mark_buffer_dirty(USPI_UBH(uspi));
ufs_mark_sb_dirty(sb);
}
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
sb->s_flags |= MS_RDONLY;
pr_crit("panic (device %s): %s: %pV\n",
sb->s_id, function, &vaf);
va_end(args);
}
void ufs_warning (struct super_block * sb, const char * function,
const char * fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
pr_warn("(device %s): %s: %pV\n",
sb->s_id, function, &vaf);
va_end(args);
}
enum {
Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
Opt_err
};
static const match_table_t tokens = {
{Opt_type_old, "ufstype=old"},
{Opt_type_sunx86, "ufstype=sunx86"},
{Opt_type_sun, "ufstype=sun"},
{Opt_type_sunos, "ufstype=sunos"},
{Opt_type_44bsd, "ufstype=44bsd"},
{Opt_type_ufs2, "ufstype=ufs2"},
{Opt_type_ufs2, "ufstype=5xbsd"},
{Opt_type_hp, "ufstype=hp"},
{Opt_type_nextstepcd, "ufstype=nextstep-cd"},
{Opt_type_nextstep, "ufstype=nextstep"},
{Opt_type_openstep, "ufstype=openstep"},
/*end of possible ufs types */
{Opt_onerror_panic, "onerror=panic"},
{Opt_onerror_lock, "onerror=lock"},
{Opt_onerror_umount, "onerror=umount"},
{Opt_onerror_repair, "onerror=repair"},
{Opt_err, NULL}
};
static int ufs_parse_options (char * options, unsigned * mount_options)
{
char * p;
UFSD("ENTER\n");
if (!options)
return 1;
while ((p = strsep(&options, ",")) != NULL) {
substring_t args[MAX_OPT_ARGS];
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
switch (token) {
case Opt_type_old:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_OLD);
break;
case Opt_type_sunx86:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
break;
case Opt_type_sun:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_SUN);
break;
case Opt_type_sunos:
ufs_clear_opt(*mount_options, UFSTYPE);
ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
break;
case Opt_type_44bsd:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_44BSD);
break;
case Opt_type_ufs2:
ufs_clear_opt(*mount_options, UFSTYPE);
ufs_set_opt(*mount_options, UFSTYPE_UFS2);
break;
case Opt_type_hp:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_HP);
break;
case Opt_type_nextstepcd:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
break;
case Opt_type_nextstep:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
break;
case Opt_type_openstep:
ufs_clear_opt (*mount_options, UFSTYPE);
ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
break;
case Opt_onerror_panic:
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_PANIC);
break;
case Opt_onerror_lock:
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_LOCK);
break;
case Opt_onerror_umount:
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_UMOUNT);
break;
case Opt_onerror_repair:
pr_err("Unable to do repair on error, will lock lock instead\n");
ufs_clear_opt (*mount_options, ONERROR);
ufs_set_opt (*mount_options, ONERROR_REPAIR);
break;
default:
pr_err("Invalid option: \"%s\" or missing value\n", p);
return 0;
}
}
return 1;
}
/*
* Different types of UFS hold fs_cstotal in different
* places, and use different data structure for it.
* To make things simpler we just copy fs_cstotal to ufs_sb_private_info
*/
static void ufs_setup_cstotal(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
struct ufs_sb_private_info *uspi = sbi->s_uspi;
struct ufs_super_block_first *usb1;
struct ufs_super_block_second *usb2;
struct ufs_super_block_third *usb3;
unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
UFSD("ENTER, mtype=%u\n", mtype);
usb1 = ubh_get_usb_first(uspi);
usb2 = ubh_get_usb_second(uspi);
usb3 = ubh_get_usb_third(uspi);
if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
(usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
mtype == UFS_MOUNT_UFSTYPE_UFS2) {
/*we have statistic in different place, then usual*/
uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
} else {
uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
}
UFSD("EXIT\n");
}
/*
* Read on-disk structures associated with cylinder groups
*/
static int ufs_read_cylinder_structures(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
struct ufs_sb_private_info *uspi = sbi->s_uspi;
struct ufs_buffer_head * ubh;
unsigned char * base, * space;
unsigned size, blks, i;
UFSD("ENTER\n");
/*
* Read cs structures from (usually) first data block
* on the device.
*/
size = uspi->s_cssize;
blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
base = space = kmalloc(size, GFP_NOFS);
if (!base)
goto failed;
sbi->s_csp = (struct ufs_csum *)space;
for (i = 0; i < blks; i += uspi->s_fpb) {
size = uspi->s_bsize;
if (i + uspi->s_fpb > blks)
size = (blks - i) * uspi->s_fsize;
ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
if (!ubh)
goto failed;
ubh_ubhcpymem (space, ubh, size);
space += size;
ubh_brelse (ubh);
ubh = NULL;
}
/*
* Read cylinder group (we read only first fragment from block
* at this time) and prepare internal data structures for cg caching.
*/
if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
goto failed;
for (i = 0; i < uspi->s_ncg; i++)
sbi->s_ucg[i] = NULL;
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
sbi->s_ucpi[i] = NULL;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
for (i = 0; i < uspi->s_ncg; i++) {
UFSD("read cg %u\n", i);
if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
goto failed;
if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
goto failed;
ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
}
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
goto failed;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
sbi->s_cg_loaded = 0;
UFSD("EXIT\n");
return 1;
failed:
kfree (base);
if (sbi->s_ucg) {
for (i = 0; i < uspi->s_ncg; i++)
if (sbi->s_ucg[i])
brelse (sbi->s_ucg[i]);
kfree (sbi->s_ucg);
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
kfree (sbi->s_ucpi[i]);
}
UFSD("EXIT (FAILED)\n");
return 0;
}
/*
* Sync our internal copy of fs_cstotal with disk
*/
static void ufs_put_cstotal(struct super_block *sb)
{
unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
struct ufs_super_block_first *usb1;
struct ufs_super_block_second *usb2;
struct ufs_super_block_third *usb3;
UFSD("ENTER\n");
usb1 = ubh_get_usb_first(uspi);
usb2 = ubh_get_usb_second(uspi);
usb3 = ubh_get_usb_third(uspi);
if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
(usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
mtype == UFS_MOUNT_UFSTYPE_UFS2) {
/*we have statistic in different place, then usual*/
usb2->fs_un.fs_u2.cs_ndir =
cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
usb2->fs_un.fs_u2.cs_nbfree =
cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
usb3->fs_un1.fs_u2.cs_nifree =
cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
usb3->fs_un1.fs_u2.cs_nffree =
cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
} else {
usb1->fs_cstotal.cs_ndir =
cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
usb1->fs_cstotal.cs_nbfree =
cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
usb1->fs_cstotal.cs_nifree =
cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
usb1->fs_cstotal.cs_nffree =
cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
}
ubh_mark_buffer_dirty(USPI_UBH(uspi));
ufs_print_super_stuff(sb, usb1, usb2, usb3);
UFSD("EXIT\n");
}
/**
* ufs_put_super_internal() - put on-disk intrenal structures
* @sb: pointer to super_block structure
* Put on-disk structures associated with cylinder groups
* and write them back to disk, also update cs_total on disk
*/
static void ufs_put_super_internal(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
struct ufs_sb_private_info *uspi = sbi->s_uspi;
struct ufs_buffer_head * ubh;
unsigned char * base, * space;
unsigned blks, size, i;
UFSD("ENTER\n");
ufs_put_cstotal(sb);
size = uspi->s_cssize;
blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
base = space = (char*) sbi->s_csp;
for (i = 0; i < blks; i += uspi->s_fpb) {
size = uspi->s_bsize;
if (i + uspi->s_fpb > blks)
size = (blks - i) * uspi->s_fsize;
ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
ubh_memcpyubh (ubh, space, size);
space += size;
ubh_mark_buffer_uptodate (ubh, 1);
ubh_mark_buffer_dirty (ubh);
ubh_brelse (ubh);
}
for (i = 0; i < sbi->s_cg_loaded; i++) {
ufs_put_cylinder (sb, i);
kfree (sbi->s_ucpi[i]);
}
for (; i < UFS_MAX_GROUP_LOADED; i++)
kfree (sbi->s_ucpi[i]);
for (i = 0; i < uspi->s_ncg; i++)
brelse (sbi->s_ucg[i]);
kfree (sbi->s_ucg);
kfree (base);
UFSD("EXIT\n");
}
static int ufs_sync_fs(struct super_block *sb, int wait)
{
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_super_block_third * usb3;
unsigned flags;
lock_ufs(sb);
UFSD("ENTER\n");
flags = UFS_SB(sb)->s_flags;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
usb3 = ubh_get_usb_third(uspi);
usb1->fs_time = cpu_to_fs32(sb, get_seconds());
if ((flags & UFS_ST_MASK) == UFS_ST_SUN ||
(flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
(flags & UFS_ST_MASK) == UFS_ST_SUNx86)
ufs_set_fs_state(sb, usb1, usb3,
UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
ufs_put_cstotal(sb);
UFSD("EXIT\n");
unlock_ufs(sb);
return 0;
}
static void delayed_sync_fs(struct work_struct *work)
{
struct ufs_sb_info *sbi;
sbi = container_of(work, struct ufs_sb_info, sync_work.work);
spin_lock(&sbi->work_lock);
sbi->work_queued = 0;
spin_unlock(&sbi->work_lock);
ufs_sync_fs(sbi->sb, 1);
}
void ufs_mark_sb_dirty(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
unsigned long delay;
spin_lock(&sbi->work_lock);
if (!sbi->work_queued) {
delay = msecs_to_jiffies(dirty_writeback_interval * 10);
queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
sbi->work_queued = 1;
}
spin_unlock(&sbi->work_lock);
}
static void ufs_put_super(struct super_block *sb)
{
struct ufs_sb_info * sbi = UFS_SB(sb);
UFSD("ENTER\n");
if (!(sb->s_flags & MS_RDONLY))
ufs_put_super_internal(sb);
cancel_delayed_work_sync(&sbi->sync_work);
ubh_brelse_uspi (sbi->s_uspi);
kfree (sbi->s_uspi);
mutex_destroy(&sbi->mutex);
kfree (sbi);
sb->s_fs_info = NULL;
UFSD("EXIT\n");
return;
}
static int ufs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ufs_sb_info * sbi;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_super_block_second * usb2;
struct ufs_super_block_third * usb3;
struct ufs_buffer_head * ubh;
struct inode *inode;
unsigned block_size, super_block_size;
unsigned flags;
unsigned super_block_offset;
unsigned maxsymlen;
int ret = -EINVAL;
uspi = NULL;
ubh = NULL;
flags = 0;
UFSD("ENTER\n");
#ifndef CONFIG_UFS_FS_WRITE
if (!(sb->s_flags & MS_RDONLY)) {
pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
return -EROFS;
}
#endif
sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
if (!sbi)
goto failed_nomem;
sb->s_fs_info = sbi;
sbi->sb = sb;
UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
mutex_init(&sbi->mutex);
spin_lock_init(&sbi->work_lock);
INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
/*
* Set default mount options
* Parse mount options
*/
sbi->s_mount_opt = 0;
ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
pr_err("wrong mount options\n");
goto failed;
}
if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
if (!silent)
pr_err("You didn't specify the type of your ufs filesystem\n\n"
"mount -t ufs -o ufstype="
"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
"default is ufstype=old\n");
ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
}
uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
sbi->s_uspi = uspi;
if (!uspi)
goto failed;
uspi->s_dirblksize = UFS_SECTOR_SIZE;
super_block_offset=UFS_SBLOCK;
/* Keep 2Gig file limit. Some UFS variants need to override
this but as I don't know which I'll let those in the know loosen
the rules */
switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
case UFS_MOUNT_UFSTYPE_44BSD:
UFSD("ufstype=44bsd\n");
uspi->s_fsize = block_size = 512;
uspi->s_fmask = ~(512 - 1);
uspi->s_fshift = 9;
uspi->s_sbsize = super_block_size = 1536;
uspi->s_sbbase = 0;
flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
break;
case UFS_MOUNT_UFSTYPE_UFS2:
UFSD("ufstype=ufs2\n");
super_block_offset=SBLOCK_UFS2;
uspi->s_fsize = block_size = 512;
uspi->s_fmask = ~(512 - 1);
uspi->s_fshift = 9;
uspi->s_sbsize = super_block_size = 1536;
uspi->s_sbbase = 0;
flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
break;
case UFS_MOUNT_UFSTYPE_SUN:
UFSD("ufstype=sun\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_maxsymlinklen = 0; /* Not supported on disk */
flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
break;
case UFS_MOUNT_UFSTYPE_SUNOS:
UFSD("ufstype=sunos\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = 2048;
super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_maxsymlinklen = 0; /* Not supported on disk */
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
break;
case UFS_MOUNT_UFSTYPE_SUNx86:
UFSD("ufstype=sunx86\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_maxsymlinklen = 0; /* Not supported on disk */
flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
break;
case UFS_MOUNT_UFSTYPE_OLD:
UFSD("ufstype=old\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
pr_info("ufstype=old is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_NEXTSTEP:
UFSD("ufstype=nextstep\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_dirblksize = 1024;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
pr_info("ufstype=nextstep is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
UFSD("ufstype=nextstep-cd\n");
uspi->s_fsize = block_size = 2048;
uspi->s_fmask = ~(2048 - 1);
uspi->s_fshift = 11;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_dirblksize = 1024;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
pr_info("ufstype=nextstep-cd is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_OPENSTEP:
UFSD("ufstype=openstep\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
uspi->s_dirblksize = 1024;
flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
pr_info("ufstype=openstep is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
case UFS_MOUNT_UFSTYPE_HP:
UFSD("ufstype=hp\n");
uspi->s_fsize = block_size = 1024;
uspi->s_fmask = ~(1024 - 1);
uspi->s_fshift = 10;
uspi->s_sbsize = super_block_size = 2048;
uspi->s_sbbase = 0;
flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
if (!(sb->s_flags & MS_RDONLY)) {
if (!silent)
pr_info("ufstype=hp is supported read-only\n");
sb->s_flags |= MS_RDONLY;
}
break;
default:
if (!silent)
pr_err("unknown ufstype\n");
goto failed;
}
again:
if (!sb_set_blocksize(sb, block_size)) {
pr_err("failed to set blocksize\n");
goto failed;
}
/*
* read ufs super block from device
*/
ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
if (!ubh)
goto failed;
usb1 = ubh_get_usb_first(uspi);
usb2 = ubh_get_usb_second(uspi);
usb3 = ubh_get_usb_third(uspi);
/* Sort out mod used on SunOS 4.1.3 for fs_state */
uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
(uspi->s_postblformat != UFS_42POSTBLFMT)) {
flags &= ~UFS_ST_MASK;
flags |= UFS_ST_SUN;
}
/*
* Check ufs magic number