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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
|
/*
* Copyright (c) 1989, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
* $Id: ffs_vfsops.c,v 1.30 1995/12/07 12:47:51 davidg Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/mbuf.h>
#include <sys/file.h>
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <miscfs/specfs/specdev.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_prot.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
int ffs_sbupdate __P((struct ufsmount *, int));
int ffs_reload __P((struct mount *,struct ucred *,struct proc *));
int ffs_oldfscompat __P((struct fs *));
struct vfsops ufs_vfsops = {
ffs_mount,
ufs_start,
ffs_unmount,
ufs_root,
ufs_quotactl,
ffs_statfs,
ffs_sync,
ffs_vget,
ffs_fhtovp,
ffs_vptofh,
ffs_init,
};
VFS_SET(ufs_vfsops, ufs, MOUNT_UFS, 0);
extern u_long nextgennumber;
/*
* ffs_mount
*
* Called when mounting local physical media
*
* PARAMETERS:
* mountroot
* mp mount point structure
* path NULL (flag for root mount!!!)
* data <unused>
* ndp <unused>
* p process (user credentials check [statfs])
*
* mount
* mp mount point structure
* path path to mount point
* data pointer to argument struct in user space
* ndp mount point namei() return (used for
* credentials on reload), reused to look
* up block device.
* p process (user credentials check)
*
* RETURNS: 0 Success
* !0 error number (errno.h)
*
* LOCK STATE:
*
* ENTRY
* mount point is locked
* EXIT
* mount point is locked
*
* NOTES:
* A NULL path can be used for a flag since the mount
* system call will fail with EFAULT in copyinstr in
* namei() if it is a genuine NULL from the user.
*/
int
ffs_mount( mp, path, data, ndp, p)
register struct mount *mp; /* mount struct pointer*/
char *path; /* path to mount point*/
caddr_t data; /* arguments to FS specific mount*/
struct nameidata *ndp; /* mount point credentials*/
struct proc *p; /* process requesting mount*/
{
u_int size;
int err = 0;
struct vnode *devvp;
struct ufs_args args;
struct ufsmount *ump = 0;
register struct fs *fs;
int flags;
/*
* Use NULL path to flag a root mount
*/
if( path == NULL) {
/*
***
* Mounting root file system
***
*/
/* Get vnode for root device*/
if( bdevvp( rootdev, &rootvp))
panic("ffs_mountroot: can't setup bdevvp for root");
/*
* FS specific handling
*/
mp->mnt_flag |= MNT_RDONLY; /* XXX globally applicable?*/
/*
* Attempt mount
*/
if( ( err = ffs_mountfs(rootvp, mp, p)) != 0) {
/* fs specific cleanup (if any)*/
goto error_1;
}
goto dostatfs; /* success*/
}
/*
***
* Mounting non-root file system or updating a file system
***
*/
/* copy in user arguments*/
err = copyin(data, (caddr_t)&args, sizeof (struct ufs_args));
if (err)
goto error_1; /* can't get arguments*/
/*
* If updating, check whether changing from read-only to
* read/write; if there is no device name, that's all we do.
*/
if (mp->mnt_flag & MNT_UPDATE) {
ump = VFSTOUFS(mp);
fs = ump->um_fs;
err = 0;
if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
flags = WRITECLOSE;
if (mp->mnt_flag & MNT_FORCE)
flags |= FORCECLOSE;
if (vfs_busy(mp)) {
err = EBUSY;
goto error_1;
}
err = ffs_flushfiles(mp, flags, p);
vfs_unbusy(mp);
}
if (!err && (mp->mnt_flag & MNT_RELOAD))
err = ffs_reload(mp, ndp->ni_cnd.cn_cred, p);
if (err) {
goto error_1;
}
if (fs->fs_ronly && (mp->mnt_flag & MNT_WANTRDWR)) {
if (!fs->fs_clean) {
if (mp->mnt_flag & MNT_FORCE) {
printf("WARNING: %s was not properly dismounted.\n",fs->fs_fsmnt);
} else {
printf("WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck.\n",
fs->fs_fsmnt);
err = EPERM;
goto error_1;
}
}
fs->fs_ronly = 0;
}
if (fs->fs_ronly == 0) {
fs->fs_clean = 0;
ffs_sbupdate(ump, MNT_WAIT);
}
/* if not updating name...*/
if (args.fspec == 0) {
/*
* Process export requests. Jumping to "success"
* will return the vfs_export() error code.
*/
err = vfs_export(mp, &ump->um_export, &args.export);
goto success;
}
}
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
err = namei(ndp);
if (err) {
/* can't get devvp!*/
goto error_1;
}
devvp = ndp->ni_vp;
if (devvp->v_type != VBLK) {
err = ENOTBLK;
goto error_2;
}
if (major(devvp->v_rdev) >= nblkdev) {
err = ENXIO;
goto error_2;
}
if (mp->mnt_flag & MNT_UPDATE) {
/*
********************
* UPDATE
********************
*/
if (devvp != ump->um_devvp)
err = EINVAL; /* needs translation */
else
vrele(devvp);
/*
* Update device name only on success
*/
if( !err) {
/* Save "mounted from" info for mount point (NULL pad)*/
copyinstr( args.fspec,
mp->mnt_stat.f_mntfromname,
MNAMELEN - 1,
&size);
bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
}
} else {
/*
********************
* NEW MOUNT
********************
*/
/*
* Since this is a new mount, we want the names for
* the device and the mount point copied in. If an
* error occurs, the mountpoint is discarded by the
* upper level code.
*/
/* Save "last mounted on" info for mount point (NULL pad)*/
copyinstr( path, /* mount point*/
mp->mnt_stat.f_mntonname, /* save area*/
MNAMELEN - 1, /* max size*/
&size); /* real size*/
bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
/* Save "mounted from" info for mount point (NULL pad)*/
copyinstr( args.fspec, /* device name*/
mp->mnt_stat.f_mntfromname, /* save area*/
MNAMELEN - 1, /* max size*/
&size); /* real size*/
bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
err = ffs_mountfs(devvp, mp, p);
}
if (err) {
goto error_2;
}
dostatfs:
/*
* Initialize FS stat information in mount struct; uses both
* mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
*
* This code is common to root and non-root mounts
*/
(void)VFS_STATFS(mp, &mp->mnt_stat, p);
goto success;
error_2: /* error with devvp held*/
/* release devvp before failing*/
vrele(devvp);
error_1: /* no state to back out*/
success:
return( err);
}
/*
* Reload all incore data for a filesystem (used after running fsck on
* the root filesystem and finding things to fix). The filesystem must
* be mounted read-only.
*
* Things to do to update the mount:
* 1) invalidate all cached meta-data.
* 2) re-read superblock from disk.
* 3) re-read summary information from disk.
* 4) invalidate all inactive vnodes.
* 5) invalidate all cached file data.
* 6) re-read inode data for all active vnodes.
*/
int
ffs_reload(mp, cred, p)
register struct mount *mp;
struct ucred *cred;
struct proc *p;
{
register struct vnode *vp, *nvp, *devvp;
struct inode *ip;
struct csum *space;
struct buf *bp;
struct fs *fs;
int i, blks, size, error;
if ((mp->mnt_flag & MNT_RDONLY) == 0)
return (EINVAL);
/*
* Step 1: invalidate all cached meta-data.
*/
devvp = VFSTOUFS(mp)->um_devvp;
if (vinvalbuf(devvp, 0, cred, p, 0, 0))
panic("ffs_reload: dirty1");
/*
* Step 2: re-read superblock from disk.
*/
error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp);
if (error)
return (error);
fs = (struct fs *)bp->b_data;
if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
fs->fs_bsize < sizeof(struct fs)) {
brelse(bp);
return (EIO); /* XXX needs translation */
}
fs = VFSTOUFS(mp)->um_fs;
bcopy(&fs->fs_csp[0], &((struct fs *)bp->b_data)->fs_csp[0],
sizeof(fs->fs_csp));
bcopy(bp->b_data, fs, (u_int)fs->fs_sbsize);
if (fs->fs_sbsize < SBSIZE)
bp->b_flags |= B_INVAL;
brelse(bp);
ffs_oldfscompat(fs);
/*
* Step 3: re-read summary information from disk.
*/
blks = howmany(fs->fs_cssize, fs->fs_fsize);
space = fs->fs_csp[0];
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
NOCRED, &bp);
if (error)
return (error);
bcopy(bp->b_data, fs->fs_csp[fragstoblks(fs, i)], (u_int)size);
brelse(bp);
}
loop:
for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
nvp = vp->v_mntvnodes.le_next;
/*
* Step 4: invalidate all inactive vnodes.
*/
if (vp->v_usecount == 0) {
vgone(vp);
continue;
}
/*
* Step 5: invalidate all cached file data.
*/
if (vget(vp, 1))
goto loop;
if (vinvalbuf(vp, 0, cred, p, 0, 0))
panic("ffs_reload: dirty2");
/*
* Step 6: re-read inode data for all active vnodes.
*/
ip = VTOI(vp);
error =
bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
(int)fs->fs_bsize, NOCRED, &bp);
if (error) {
vput(vp);
return (error);
}
ip->i_din = *((struct dinode *)bp->b_data +
ino_to_fsbo(fs, ip->i_number));
brelse(bp);
vput(vp);
if (vp->v_mount != mp)
goto loop;
}
return (0);
}
/*
* Common code for mount and mountroot
*/
int
ffs_mountfs(devvp, mp, p)
register struct vnode *devvp;
struct mount *mp;
struct proc *p;
{
register struct ufsmount *ump;
struct buf *bp;
register struct fs *fs;
dev_t dev = devvp->v_rdev;
struct partinfo dpart;
caddr_t base, space;
int havepart = 0, blks;
int error, i, size;
int ronly;
u_int strsize;
/*
* Disallow multiple mounts of the same device.
* Disallow mounting of a device that is currently in use
* (except for root, which might share swap device for miniroot).
* Flush out any old buffers remaining from a previous use.
*/
error = vfs_mountedon(devvp);
if (error)
return (error);
if (vcount(devvp) > 1 && devvp != rootvp)
return (EBUSY);
error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0);
if (error)
return (error);
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
if (error)
return (error);
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
size = DEV_BSIZE;
else {
havepart = 1;
size = dpart.disklab->d_secsize;
}
bp = NULL;
ump = NULL;
error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp);
if (error)
goto out;
fs = (struct fs *)bp->b_data;
if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
fs->fs_bsize < sizeof(struct fs)) {
error = EINVAL; /* XXX needs translation */
goto out;
}
if (!fs->fs_clean) {
if (ronly || (mp->mnt_flag & MNT_FORCE)) {
printf("WARNING: %s was not properly dismounted.\n",fs->fs_fsmnt);
} else {
printf("WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck.\n",fs->fs_fsmnt);
error = EPERM;
goto out;
}
}
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
bzero((caddr_t)ump, sizeof *ump);
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
M_WAITOK);
bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize);
if (fs->fs_sbsize < SBSIZE)
bp->b_flags |= B_INVAL;
brelse(bp);
bp = NULL;
fs = ump->um_fs;
fs->fs_ronly = ronly;
if (ronly == 0) {
fs->fs_fmod = 1;
fs->fs_clean = 0;
}
blks = howmany(fs->fs_cssize, fs->fs_fsize);
base = space = malloc((u_long)fs->fs_cssize, M_UFSMNT,
M_WAITOK);
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
NOCRED, &bp);
if (error) {
free(base, M_UFSMNT);
goto out;
}
bcopy(bp->b_data, space, (u_int)size);
fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
space += size;
brelse(bp);
bp = NULL;
}
mp->mnt_data = (qaddr_t)ump;
mp->mnt_stat.f_fsid.val[0] = (long)dev;
mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS;
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
mp->mnt_flag |= MNT_LOCAL;
ump->um_mountp = mp;
ump->um_dev = dev;
ump->um_devvp = devvp;
ump->um_nindir = fs->fs_nindir;
ump->um_bptrtodb = fs->fs_fsbtodb;
ump->um_seqinc = fs->fs_frag;
for (i = 0; i < MAXQUOTAS; i++)
ump->um_quotas[i] = NULLVP;
devvp->v_specflags |= SI_MOUNTEDON;
ffs_oldfscompat(fs);
/*
* Set FS local "last mounted on" information (NULL pad)
*/
copystr( mp->mnt_stat.f_mntonname, /* mount point*/
fs->fs_fsmnt, /* copy area*/
sizeof(fs->fs_fsmnt) - 1, /* max size*/
&strsize); /* real size*/
bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize);
if( mp->mnt_flag & MNT_ROOTFS) {
/*
* Root mount; update timestamp in mount structure.
* this will be used by the common root mount code
* to update the system clock.
*/
mp->mnt_time = fs->fs_time;
}
if (ronly == 0)
ffs_sbupdate(ump, MNT_WAIT);
return (0);
out:
if (bp)
brelse(bp);
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
if (ump) {
free(ump->um_fs, M_UFSMNT);
free(ump, M_UFSMNT);
mp->mnt_data = (qaddr_t)0;
}
return (error);
}
/*
* Sanity checks for old file systems.
*
* XXX - goes away some day.
*/
int
ffs_oldfscompat(fs)
struct fs *fs;
{
fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */
fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
fs->fs_nrpos = 8; /* XXX */
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
#if 0
int i; /* XXX */
quad_t sizepb = fs->fs_bsize; /* XXX */
fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
for (i = 0; i < NIADDR; i++) { /* XXX */
sizepb *= NINDIR(fs); /* XXX */
fs->fs_maxfilesize += sizepb; /* XXX */
} /* XXX */
#endif
fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
} /* XXX */
return (0);
}
/*
* unmount system call
*/
int
ffs_unmount(mp, mntflags, p)
struct mount *mp;
int mntflags;
struct proc *p;
{
register struct ufsmount *ump;
register struct fs *fs;
int error, flags, ronly;
flags = 0;
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
}
error = ffs_flushfiles(mp, flags, p);
if (error)
return (error);
ump = VFSTOUFS(mp);
fs = ump->um_fs;
ronly = fs->fs_ronly;
if (!ronly) {
fs->fs_clean = 1;
ffs_sbupdate(ump, MNT_WAIT);
}
ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
NOCRED, p);
/*
vrele(ump->um_devvp);
*/
vn_vmio_close(ump->um_devvp);
free(fs->fs_csp[0], M_UFSMNT);
free(fs, M_UFSMNT);
free(ump, M_UFSMNT);
mp->mnt_data = (qaddr_t)0;
mp->mnt_flag &= ~MNT_LOCAL;
return (error);
}
/*
* Flush out all the files in a filesystem.
*/
int
ffs_flushfiles(mp, flags, p)
register struct mount *mp;
int flags;
struct proc *p;
{
register struct ufsmount *ump;
int error;
if (!doforce)
flags &= ~FORCECLOSE;
ump = VFSTOUFS(mp);
#ifdef QUOTA
if (mp->mnt_flag & MNT_QUOTA) {
int i;
error = vflush(mp, NULLVP, SKIPSYSTEM|flags);
if (error)
return (error);
for (i = 0; i < MAXQUOTAS; i++) {
if (ump->um_quotas[i] == NULLVP)
continue;
quotaoff(p, mp, i);
}
/*
* Here we fall through to vflush again to ensure
* that we have gotten rid of all the system vnodes.
*/
}
#endif
error = vflush(mp, NULLVP, flags);
return (error);
}
/*
* Get file system statistics.
*/
int
ffs_statfs(mp, sbp, p)
struct mount *mp;
register struct statfs *sbp;
struct proc *p;
{
register struct ufsmount *ump;
register struct fs *fs;
ump = VFSTOUFS(mp);
fs = ump->um_fs;
if (fs->fs_magic != FS_MAGIC)
panic("ffs_statfs");
sbp->f_type = MOUNT_UFS;
sbp->f_bsize = fs->fs_fsize;
sbp->f_iosize = fs->fs_bsize;
sbp->f_blocks = fs->fs_dsize;
sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
fs->fs_cstotal.cs_nffree;
sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) -
(fs->fs_dsize - sbp->f_bfree);
sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
sbp->f_ffree = fs->fs_cstotal.cs_nifree;
if (sbp != &mp->mnt_stat) {
bcopy((caddr_t)mp->mnt_stat.f_mntonname,
(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
}
return (0);
}
/*
* Go through the disk queues to initiate sandbagged IO;
* go through the inodes to write those that have been modified;
* initiate the writing of the super block if it has been modified.
*
* Note: we are always called with the filesystem marked `MPBUSY'.
*/
int
ffs_sync(mp, waitfor, cred, p)
struct mount *mp;
int waitfor;
struct ucred *cred;
struct proc *p;
{
register struct vnode *vp, *nvp;
register struct inode *ip;
register struct ufsmount *ump = VFSTOUFS(mp);
register struct fs *fs;
struct timeval tv;
int error, allerror = 0;
fs = ump->um_fs;
/*
* Write back modified superblock.
* Consistency check that the superblock
* is still in the buffer cache.
*/
if (fs->fs_fmod != 0) {
if (fs->fs_ronly != 0) { /* XXX */
printf("fs = %s\n", fs->fs_fsmnt);
panic("update: rofs mod");
}
fs->fs_fmod = 0;
fs->fs_time = time.tv_sec;
allerror = ffs_sbupdate(ump, waitfor);
}
/*
* Write back each (modified) inode.
*/
loop:
for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
/*
* If the vnode that we are about to sync is no longer
* associated with this mount point, start over.
*/
if (vp->v_mount != mp)
goto loop;
nvp = vp->v_mntvnodes.le_next;
if (VOP_ISLOCKED(vp))
continue;
ip = VTOI(vp);
if ((((ip->i_flag &
(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0)) &&
vp->v_dirtyblkhd.lh_first == NULL)
continue;
if (vp->v_type != VCHR) {
if (vget(vp, 1))
goto loop;
error = VOP_FSYNC(vp, cred, waitfor, p);
if (error)
allerror = error;
vput(vp);
} else {
tv = time;
/* VOP_UPDATE(vp, &tv, &tv, waitfor == MNT_WAIT); */
VOP_UPDATE(vp, &tv, &tv, 0);
}
}
/*
* Force stale file system control information to be flushed.
*/
error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p);
if (error)
allerror = error;
#ifdef QUOTA
qsync(mp);
#endif
return (allerror);
}
/*
* Look up a FFS dinode number to find its incore vnode, otherwise read it
* in from disk. If it is in core, wait for the lock bit to clear, then
* return the inode locked. Detection and handling of mount points must be
* done by the calling routine.
*/
int ffs_inode_hash_lock;
int
ffs_vget(mp, ino, vpp)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
{
register struct fs *fs;
register struct inode *ip;
struct ufsmount *ump;
struct buf *bp;
struct vnode *vp;
dev_t dev;
int type, error;
ump = VFSTOUFS(mp);
dev = ump->um_dev;
restart:
if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
return (0);
/*
* Lock out the creation of new entries in the FFS hash table in
* case getnewvnode() or MALLOC() blocks, otherwise a duplicate
* may occur!
*/
if (ffs_inode_hash_lock) {
while (ffs_inode_hash_lock) {
ffs_inode_hash_lock = -1;
tsleep(&ffs_inode_hash_lock, PVM, "ffsvgt", 0);
}
goto restart;
}
ffs_inode_hash_lock = 1;
/* Allocate a new vnode/inode. */
error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp);
if (error) {
if (ffs_inode_hash_lock < 0)
wakeup(&ffs_inode_hash_lock);
ffs_inode_hash_lock = 0;
*vpp = NULL;
return (error);
}
type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */
MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK);
bzero((caddr_t)ip, sizeof(struct inode));
vp->v_data = ip;
ip->i_vnode = vp;
ip->i_fs = fs = ump->um_fs;
ip->i_dev = dev;
ip->i_number = ino;
#ifdef QUOTA
{
int i;
for (i = 0; i < MAXQUOTAS; i++)
ip->i_dquot[i] = NODQUOT;
}
#endif
/*
* Put it onto its hash chain and lock it so that other requests for
* this inode will block if they arrive while we are sleeping waiting
* for old data structures to be purged or for the contents of the
* disk portion of this inode to be read.
*/
ufs_ihashins(ip);
if (ffs_inode_hash_lock < 0)
wakeup(&ffs_inode_hash_lock);
ffs_inode_hash_lock = 0;
/* Read in the disk contents for the inode, copy into the inode. */
error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
(int)fs->fs_bsize, NOCRED, &bp);
if (error) {
/*
* The inode does not contain anything useful, so it would
* be misleading to leave it on its hash chain. With mode
* still zero, it will be unlinked and returned to the free
* list by vput().
*/
vput(vp);
brelse(bp);
*vpp = NULL;
return (error);
}
ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
brelse(bp);
/*
* Initialize the vnode from the inode, check for aliases.
* Note that the underlying vnode may have changed.
*/
error = ufs_vinit(mp, ffs_specop_p, FFS_FIFOOPS, &vp);
if (error) {
vput(vp);
*vpp = NULL;
return (error);
}
/*
* Finish inode initialization now that aliasing has been resolved.
*/
ip->i_devvp = ump->um_devvp;
VREF(ip->i_devvp);
/*
* Set up a generation number for this inode if it does not
* already have one. This should only happen on old filesystems.
*/
if (ip->i_gen == 0) {
if (++nextgennumber < (u_long)time.tv_sec)
nextgennumber = time.tv_sec;
ip->i_gen = nextgennumber;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
ip->i_flag |= IN_MODIFIED;
}
/*
* Ensure that uid and gid are correct. This is a temporary
* fix until fsck has been changed to do the update.
*/
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
ip->i_uid = ip->i_din.di_ouid; /* XXX */
ip->i_gid = ip->i_din.di_ogid; /* XXX */
} /* XXX */
*vpp = vp;
return (0);
}
/*
* File handle to vnode
*
* Have to be really careful about stale file handles:
* - check that the inode number is valid
* - call ffs_vget() to get the locked inode
* - check for an unallocated inode (i_mode == 0)
* - check that the given client host has export rights and return
* those rights via. exflagsp and credanonp
*/
int
ffs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
register struct mount *mp;
struct fid *fhp;
struct mbuf *nam;
struct vnode **vpp;
int *exflagsp;
struct ucred **credanonp;
{
register struct ufid *ufhp;
struct fs *fs;
ufhp = (struct ufid *)fhp;
fs = VFSTOUFS(mp)->um_fs;
if (ufhp->ufid_ino < ROOTINO ||
ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg)
return (ESTALE);
return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp));
}
/*
* Vnode pointer to File handle
*/
/* ARGSUSED */
int
ffs_vptofh(vp, fhp)
struct vnode *vp;
struct fid *fhp;
{
register struct inode *ip;
register struct ufid *ufhp;
ip = VTOI(vp);
ufhp = (struct ufid *)fhp;
ufhp->ufid_len = sizeof(struct ufid);
ufhp->ufid_ino = ip->i_number;
ufhp->ufid_gen = ip->i_gen;
return (0);
}
/*
* Write a superblock and associated information back to disk.
*/
int
ffs_sbupdate(mp, waitfor)
struct ufsmount *mp;
int waitfor;
{
register struct fs *fs = mp->um_fs;
register struct buf *bp;
int blks;
caddr_t space;
int i, size, error = 0;
bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0);
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
/* Restore compatibility to old file systems. XXX */
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
((struct fs *)bp->b_data)->fs_nrpos = -1; /* XXX */
if (waitfor == MNT_WAIT)
error = bwrite(bp);
else
bawrite(bp);
blks = howmany(fs->fs_cssize, fs->fs_fsize);
space = (caddr_t)fs->fs_csp[0];
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
size, 0, 0);
bcopy(space, bp->b_data, (u_int)size);
space += size;
if (waitfor == MNT_WAIT)
error = bwrite(bp);
else
bawrite(bp);
}
return (error);
}
|