2 * modified for EXT2FS support in Lites 1.1
4 * Aug 1995, Godmar Back (gback@cs.utah.edu)
5 * University of Utah, Department of Computer Science
8 * Copyright (c) 1989, 1991, 1993, 1994
9 * The Regents of the University of California. All rights reserved.
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12 * modification, are permitted provided that the following conditions
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20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
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39 * @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
40 * $FreeBSD: src/sys/gnu/ext2fs/ext2_vfsops.c,v 1.63.2.7 2002/07/01 00:18:51 iedowse Exp $
41 * $DragonFly: src/sys/vfs/gnu/ext2fs/ext2_vfsops.c,v 1.2 2003/06/17 04:28:34 dillon Exp $
44 #include "opt_quota.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/namei.h>
50 #include <sys/kernel.h>
51 #include <sys/vnode.h>
52 #include <sys/mount.h>
55 #include <sys/fcntl.h>
56 #include <sys/disklabel.h>
57 #include <sys/malloc.h>
60 #include <ufs/ufs/quota.h>
61 #include <ufs/ufs/ufsmount.h>
62 #include <ufs/ufs/inode.h>
63 #include <ufs/ufs/ufs_extern.h>
65 #include <vm/vm_zone.h>
67 #include <gnu/ext2fs/fs.h>
68 #include <gnu/ext2fs/ext2_extern.h>
69 #include <gnu/ext2fs/ext2_fs.h>
70 #include <gnu/ext2fs/ext2_fs_sb.h>
72 static int ext2_fhtovp __P((struct mount *, struct fid *, struct vnode **));
73 static int ext2_flushfiles __P((struct mount *mp, int flags, struct proc *p));
74 static int ext2_mount __P((struct mount *,
75 char *, caddr_t, struct nameidata *, struct proc *));
76 static int ext2_mountfs __P((struct vnode *, struct mount *, struct proc *));
77 static int ext2_reload __P((struct mount *mountp, struct ucred *cred,
79 static int ext2_sbupdate __P((struct ufsmount *, int));
80 static int ext2_statfs __P((struct mount *, struct statfs *, struct proc *));
81 static int ext2_sync __P((struct mount *, int, struct ucred *, struct proc *));
82 static int ext2_unmount __P((struct mount *, int, struct proc *));
83 static int ext2_vget __P((struct mount *, ino_t, struct vnode **));
84 static int ext2_vptofh __P((struct vnode *, struct fid *));
86 static MALLOC_DEFINE(M_EXT2NODE, "EXT2 node", "EXT2 vnode private part");
88 static struct vfsops ext2fs_vfsops = {
90 ufs_start, /* empty function */
92 ufs_root, /* root inode via vget */
93 ufs_quotactl, /* does operations associated with quotas */
105 VFS_SET(ext2fs_vfsops, ext2fs, 0);
106 #define bsd_malloc malloc
107 #define bsd_free free
109 static int ext2fs_inode_hash_lock;
111 static int ext2_check_sb_compat __P((struct ext2_super_block *es,
112 dev_t dev, int ronly));
113 static int compute_sb_data __P((struct vnode * devvp,
114 struct ext2_super_block * es,
115 struct ext2_sb_info * fs));
118 static int ext2_mountroot __P((void));
121 * Called by main() when ext2fs is going to be mounted as root.
123 * Name is updated by mount(8) after booting.
125 #define ROOTNAME "root_device"
130 register struct ext2_sb_info *fs;
131 register struct mount *mp;
132 struct proc *p = curproc;
133 struct ufsmount *ump;
137 if ((error = bdevvp(rootdev, &rootvp))) {
138 printf("ext2_mountroot: can't find rootvp\n");
141 mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
142 bzero((char *)mp, (u_long)sizeof(struct mount));
143 TAILQ_INIT(&mp->mnt_nvnodelist);
144 TAILQ_INIT(&mp->mnt_reservedvnlist);
145 mp->mnt_op = &ext2fs_vfsops;
146 mp->mnt_flag = MNT_RDONLY;
147 if (error = ext2_mountfs(rootvp, mp, p)) {
148 bsd_free(mp, M_MOUNT);
151 if (error = vfs_lock(mp)) {
152 (void)ext2_unmount(mp, 0, p);
153 bsd_free(mp, M_MOUNT);
156 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
157 mp->mnt_flag |= MNT_ROOTFS;
158 mp->mnt_vnodecovered = NULLVP;
161 bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
162 fs->fs_fsmnt[0] = '/';
163 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
165 (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
167 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
168 (void)ext2_statfs(mp, &mp->mnt_stat, p);
170 inittodr(fs->s_es->s_wtime); /* this helps to set the time */
181 ext2_mount(mp, path, data, ndp, p)
182 register struct mount *mp;
184 caddr_t data; /* this is actually a (struct ufs_args *) */
185 struct nameidata *ndp;
189 struct ufs_args args;
190 struct ufsmount *ump = 0;
191 register struct ext2_sb_info *fs;
196 if ((error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) != 0)
199 * If updating, check whether changing from read-only to
200 * read/write; if there is no device name, that's all we do.
202 if (mp->mnt_flag & MNT_UPDATE) {
206 if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) {
208 if (mp->mnt_flag & MNT_FORCE)
210 if (vfs_busy(mp, LK_NOWAIT, 0, p))
212 error = ext2_flushfiles(mp, flags, p);
214 if (!error && fs->s_wasvalid) {
215 fs->s_es->s_state |= EXT2_VALID_FS;
216 ext2_sbupdate(ump, MNT_WAIT);
220 if (!error && (mp->mnt_flag & MNT_RELOAD))
221 error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p);
224 devvp = ump->um_devvp;
225 if (ext2_check_sb_compat(fs->s_es, devvp->v_rdev,
226 (mp->mnt_kern_flag & MNTK_WANTRDWR) == 0) != 0)
228 if (fs->s_rd_only && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
230 * If upgrade to read-write by non-root, then verify
231 * that user has necessary permissions on the device.
233 if (p->p_ucred->cr_uid != 0) {
234 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
235 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE,
236 p->p_ucred, p)) != 0) {
237 VOP_UNLOCK(devvp, 0, p);
240 VOP_UNLOCK(devvp, 0, p);
243 if ((fs->s_es->s_state & EXT2_VALID_FS) == 0 ||
244 (fs->s_es->s_state & EXT2_ERROR_FS)) {
245 if (mp->mnt_flag & MNT_FORCE) {
247 "WARNING: %s was not properly dismounted\n",
251 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
256 fs->s_es->s_state &= ~EXT2_VALID_FS;
257 ext2_sbupdate(ump, MNT_WAIT);
260 if (args.fspec == 0) {
262 * Process export requests.
264 return (vfs_export(mp, &ump->um_export, &args.export));
268 * Not an update, or updating the name: look up the name
269 * and verify that it refers to a sensible block device.
271 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
272 if ((error = namei(ndp)) != 0)
274 NDFREE(ndp, NDF_ONLY_PNBUF);
277 if (!vn_isdisk(devvp, &error)) {
283 * If mount by non-root, then verify that user has necessary
284 * permissions on the device.
286 if (p->p_ucred->cr_uid != 0) {
288 if ((mp->mnt_flag & MNT_RDONLY) == 0)
289 accessmode |= VWRITE;
290 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
291 if ((error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p)) != 0) {
295 VOP_UNLOCK(devvp, 0, p);
298 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
299 error = ext2_mountfs(devvp, mp, p);
301 if (devvp != ump->um_devvp)
302 error = EINVAL; /* needs translation */
312 (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
313 bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
314 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
316 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
318 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
319 (void)ext2_statfs(mp, &mp->mnt_stat, p);
324 * checks that the data in the descriptor blocks make sense
325 * this is taken from ext2/super.c
327 static int ext2_check_descriptors (struct ext2_sb_info * sb)
331 unsigned long block = sb->s_es->s_first_data_block;
332 struct ext2_group_desc * gdp = NULL;
334 /* ext2_debug ("Checking group descriptors"); */
336 for (i = 0; i < sb->s_groups_count; i++)
338 /* examine next descriptor block */
339 if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
340 gdp = (struct ext2_group_desc *)
341 sb->s_group_desc[desc_block++]->b_data;
342 if (gdp->bg_block_bitmap < block ||
343 gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
345 printf ("ext2_check_descriptors: "
346 "Block bitmap for group %d"
347 " not in group (block %lu)!\n",
348 i, (unsigned long) gdp->bg_block_bitmap);
351 if (gdp->bg_inode_bitmap < block ||
352 gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
354 printf ("ext2_check_descriptors: "
355 "Inode bitmap for group %d"
356 " not in group (block %lu)!\n",
357 i, (unsigned long) gdp->bg_inode_bitmap);
360 if (gdp->bg_inode_table < block ||
361 gdp->bg_inode_table + sb->s_itb_per_group >=
362 block + EXT2_BLOCKS_PER_GROUP(sb))
364 printf ("ext2_check_descriptors: "
365 "Inode table for group %d"
366 " not in group (block %lu)!\n",
367 i, (unsigned long) gdp->bg_inode_table);
370 block += EXT2_BLOCKS_PER_GROUP(sb);
377 ext2_check_sb_compat(es, dev, ronly)
378 struct ext2_super_block *es;
383 if (es->s_magic != EXT2_SUPER_MAGIC) {
384 printf("ext2fs: %s: wrong magic number %#x (expected %#x)\n",
385 devtoname(dev), es->s_magic, EXT2_SUPER_MAGIC);
388 if (es->s_rev_level > EXT2_GOOD_OLD_REV) {
389 if (es->s_feature_incompat & ~EXT2_FEATURE_INCOMPAT_SUPP) {
391 "WARNING: mount of %s denied due to unsupported optional features\n",
396 (es->s_feature_ro_compat & ~EXT2_FEATURE_RO_COMPAT_SUPP)) {
398 "WARNING: R/W mount of %s denied due to unsupported optional features\n",
407 * this computes the fields of the ext2_sb_info structure from the
408 * data in the ext2_super_block structure read in
410 static int compute_sb_data(devvp, es, fs)
411 struct vnode * devvp;
412 struct ext2_super_block * es;
413 struct ext2_sb_info * fs;
417 int logic_sb_block = 1; /* XXX for now */
422 #define V(v) printf(#v"= %d\n", fs->v);
425 fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size;
427 fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size;
429 fs->s_fsbtodb = es->s_log_block_size + 1;
431 fs->s_qbmask = fs->s_blocksize - 1;
433 fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es);
435 fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size;
438 fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size;
440 fs->s_blocks_per_group = es->s_blocks_per_group;
441 V(s_blocks_per_group)
442 fs->s_frags_per_group = es->s_frags_per_group;
444 fs->s_inodes_per_group = es->s_inodes_per_group;
445 V(s_inodes_per_group)
446 fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE;
447 V(s_inodes_per_block)
448 fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block;
450 fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc);
452 /* s_resuid / s_resgid ? */
453 fs->s_groups_count = (es->s_blocks_count -
454 es->s_first_data_block +
455 EXT2_BLOCKS_PER_GROUP(fs) - 1) /
456 EXT2_BLOCKS_PER_GROUP(fs);
458 db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) /
459 EXT2_DESC_PER_BLOCK(fs);
460 fs->s_db_per_group = db_count;
463 fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *),
466 /* adjust logic_sb_block */
467 if(fs->s_blocksize > SBSIZE)
468 /* Godmar thinks: if the blocksize is greater than 1024, then
469 the superblock is logically part of block zero.
473 for (i = 0; i < db_count; i++) {
474 error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1),
475 fs->s_blocksize, NOCRED, &fs->s_group_desc[i]);
477 for (j = 0; j < i; j++)
478 brelse(fs->s_group_desc[j]);
479 bsd_free(fs->s_group_desc, M_UFSMNT);
480 printf("EXT2-fs: unable to read group descriptors (%d)\n", error);
483 /* Set the B_LOCKED flag on the buffer, then brelse() it */
484 LCK_BUF(fs->s_group_desc[i])
486 if(!ext2_check_descriptors(fs)) {
487 for (j = 0; j < db_count; j++)
488 ULCK_BUF(fs->s_group_desc[j])
489 bsd_free(fs->s_group_desc, M_UFSMNT);
490 printf("EXT2-fs: (ext2_check_descriptors failure) "
491 "unable to read group descriptors\n");
495 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
496 fs->s_inode_bitmap_number[i] = 0;
497 fs->s_inode_bitmap[i] = NULL;
498 fs->s_block_bitmap_number[i] = 0;
499 fs->s_block_bitmap[i] = NULL;
501 fs->s_loaded_inode_bitmaps = 0;
502 fs->s_loaded_block_bitmaps = 0;
507 * Reload all incore data for a filesystem (used after running fsck on
508 * the root filesystem and finding things to fix). The filesystem must
509 * be mounted read-only.
511 * Things to do to update the mount:
512 * 1) invalidate all cached meta-data.
513 * 2) re-read superblock from disk.
514 * 3) re-read summary information from disk.
515 * 4) invalidate all inactive vnodes.
516 * 5) invalidate all cached file data.
517 * 6) re-read inode data for all active vnodes.
520 ext2_reload(mountp, cred, p)
521 register struct mount *mountp;
525 register struct vnode *vp, *nvp, *devvp;
528 struct ext2_super_block * es;
529 struct ext2_sb_info *fs;
532 if ((mountp->mnt_flag & MNT_RDONLY) == 0)
535 * Step 1: invalidate all cached meta-data.
537 devvp = VFSTOUFS(mountp)->um_devvp;
538 if (vinvalbuf(devvp, 0, cred, p, 0, 0))
539 panic("ext2_reload: dirty1");
541 * Step 2: re-read superblock from disk.
542 * constants have been adjusted for ext2
544 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
546 es = (struct ext2_super_block *)bp->b_data;
547 if (ext2_check_sb_compat(es, devvp->v_rdev, 0) != 0) {
549 return (EIO); /* XXX needs translation */
551 fs = VFSTOUFS(mountp)->um_e2fs;
552 bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block));
554 if((error = compute_sb_data(devvp, es, fs)) != 0) {
559 if (fs->fs_sbsize < SBSIZE)
560 bp->b_flags |= B_INVAL;
565 simple_lock(&mntvnode_slock);
566 for (vp = TAILQ_FIRST(&mountp->mnt_nvnodelist); vp != NULL; vp = nvp) {
567 if (vp->v_mount != mountp) {
568 simple_unlock(&mntvnode_slock);
571 nvp = TAILQ_NEXT(vp, v_nmntvnodes);
573 * Step 4: invalidate all inactive vnodes.
575 if (vrecycle(vp, &mntvnode_slock, p))
578 * Step 5: invalidate all cached file data.
580 simple_lock(&vp->v_interlock);
581 simple_unlock(&mntvnode_slock);
582 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p)) {
585 if (vinvalbuf(vp, 0, cred, p, 0, 0))
586 panic("ext2_reload: dirty2");
588 * Step 6: re-read inode data for all active vnodes.
592 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
593 (int)fs->s_blocksize, NOCRED, &bp);
598 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data +
599 EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)),
603 simple_lock(&mntvnode_slock);
605 simple_unlock(&mntvnode_slock);
610 * Common code for mount and mountroot
613 ext2_mountfs(devvp, mp, p)
614 register struct vnode *devvp;
618 register struct ufsmount *ump;
620 register struct ext2_sb_info *fs;
621 struct ext2_super_block * es;
622 dev_t dev = devvp->v_rdev;
623 struct partinfo dpart;
629 * Disallow multiple mounts of the same device.
630 * Disallow mounting of a device that is currently in use
631 * (except for root, which might share swap device for miniroot).
632 * Flush out any old buffers remaining from a previous use.
634 if ((error = vfs_mountedon(devvp)) != 0)
636 if (vcount(devvp) > 1 && devvp != rootvp)
638 if ((error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)
641 /* turn on this to force it to be read-only */
642 mp->mnt_flag |= MNT_RDONLY;
645 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
646 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
647 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
648 VOP_UNLOCK(devvp, 0, p);
651 if (devvp->v_rdev->si_iosize_max != 0)
652 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
653 if (mp->mnt_iosize_max > MAXPHYS)
654 mp->mnt_iosize_max = MAXPHYS;
655 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
659 size = dpart.disklab->d_secsize;
664 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
666 es = (struct ext2_super_block *)bp->b_data;
667 if (ext2_check_sb_compat(es, dev, ronly) != 0) {
668 error = EINVAL; /* XXX needs translation */
671 if ((es->s_state & EXT2_VALID_FS) == 0 ||
672 (es->s_state & EXT2_ERROR_FS)) {
673 if (ronly || (mp->mnt_flag & MNT_FORCE)) {
675 "WARNING: Filesystem was not properly dismounted\n");
678 "WARNING: R/W mount denied. Filesystem is not clean - run fsck\n");
683 ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
684 bzero((caddr_t)ump, sizeof *ump);
685 ump->um_malloctype = M_EXT2NODE;
686 ump->um_blkatoff = ext2_blkatoff;
687 ump->um_truncate = ext2_truncate;
688 ump->um_update = ext2_update;
689 ump->um_valloc = ext2_valloc;
690 ump->um_vfree = ext2_vfree;
691 /* I don't know whether this is the right strategy. Note that
692 we dynamically allocate both a ext2_sb_info and a ext2_super_block
693 while Linux keeps the super block in a locked buffer
695 ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info),
697 ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block),
699 bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block));
700 if ((error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)))
703 * We don't free the group descriptors allocated by compute_sb_data()
704 * until ext2_unmount(). This is OK since the mount will succeed.
709 fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */
710 /* if the fs is not mounted read-only, make sure the super block is
711 always written back on a sync()
713 fs->s_wasvalid = fs->s_es->s_state & EXT2_VALID_FS ? 1 : 0;
715 fs->s_dirt = 1; /* mark it modified */
716 fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */
718 mp->mnt_data = (qaddr_t)ump;
719 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
720 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
721 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
722 mp->mnt_flag |= MNT_LOCAL;
725 ump->um_devvp = devvp;
726 /* setting those two parameters allows us to use
727 ufs_bmap w/o changse !
729 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs);
730 ump->um_bptrtodb = fs->s_es->s_log_block_size + 1;
731 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs);
732 for (i = 0; i < MAXQUOTAS; i++)
733 ump->um_quotas[i] = NULLVP;
734 devvp->v_specmountpoint = mp;
736 ext2_sbupdate(ump, MNT_WAIT);
741 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
743 bsd_free(ump->um_e2fs->s_es, M_UFSMNT);
744 bsd_free(ump->um_e2fs, M_UFSMNT);
745 bsd_free(ump, M_UFSMNT);
746 mp->mnt_data = (qaddr_t)0;
752 * unmount system call
755 ext2_unmount(mp, mntflags, p)
760 register struct ufsmount *ump;
761 register struct ext2_sb_info *fs;
762 int error, flags, ronly, i;
765 if (mntflags & MNT_FORCE) {
766 if (mp->mnt_flag & MNT_ROOTFS)
770 if ((error = ext2_flushfiles(mp, flags, p)) != 0)
774 ronly = fs->s_rd_only;
777 fs->s_es->s_state |= EXT2_VALID_FS;
778 ext2_sbupdate(ump, MNT_WAIT);
781 /* release buffers containing group descriptors */
782 for(i = 0; i < fs->s_db_per_group; i++)
783 ULCK_BUF(fs->s_group_desc[i])
784 bsd_free(fs->s_group_desc, M_UFSMNT);
786 /* release cached inode/block bitmaps */
787 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
788 if (fs->s_inode_bitmap[i])
789 ULCK_BUF(fs->s_inode_bitmap[i])
791 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
792 if (fs->s_block_bitmap[i])
793 ULCK_BUF(fs->s_block_bitmap[i])
795 ump->um_devvp->v_specmountpoint = NULL;
796 error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
798 vrele(ump->um_devvp);
799 bsd_free(fs->s_es, M_UFSMNT);
800 bsd_free(fs, M_UFSMNT);
801 bsd_free(ump, M_UFSMNT);
802 mp->mnt_data = (qaddr_t)0;
803 mp->mnt_flag &= ~MNT_LOCAL;
808 * Flush out all the files in a filesystem.
811 ext2_flushfiles(mp, flags, p)
812 register struct mount *mp;
816 register struct ufsmount *ump;
824 if (mp->mnt_flag & MNT_QUOTA) {
825 if ((error = vflush(mp, 0, SKIPSYSTEM|flags)) != 0)
827 for (i = 0; i < MAXQUOTAS; i++) {
828 if (ump->um_quotas[i] == NULLVP)
833 * Here we fall through to vflush again to ensure
834 * that we have gotten rid of all the system vnodes.
838 error = vflush(mp, 0, flags);
843 * Get file system statistics.
844 * taken from ext2/super.c ext2_statfs
847 ext2_statfs(mp, sbp, p)
849 register struct statfs *sbp;
852 unsigned long overhead;
853 register struct ufsmount *ump;
854 register struct ext2_sb_info *fs;
855 register struct ext2_super_block *es;
862 if (es->s_magic != EXT2_SUPER_MAGIC)
863 panic("ext2_statfs - magic number spoiled");
866 * Compute the overhead (FS structures)
868 if (es->s_feature_ro_compat & EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) {
870 for (i = 0 ; i < fs->s_groups_count; i++)
871 if (ext2_group_sparse(i))
874 nsb = fs->s_groups_count;
875 overhead = es->s_first_data_block +
876 /* Superblocks and block group descriptors: */
877 nsb * (1 + fs->s_db_per_group) +
878 /* Inode bitmap, block bitmap, and inode table: */
879 fs->s_groups_count * (1 + 1 + fs->s_itb_per_group);
881 sbp->f_bsize = EXT2_FRAG_SIZE(fs);
882 sbp->f_iosize = EXT2_BLOCK_SIZE(fs);
883 sbp->f_blocks = es->s_blocks_count - overhead;
884 sbp->f_bfree = es->s_free_blocks_count;
885 sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count;
886 sbp->f_files = es->s_inodes_count;
887 sbp->f_ffree = es->s_free_inodes_count;
888 if (sbp != &mp->mnt_stat) {
889 sbp->f_type = mp->mnt_vfc->vfc_typenum;
890 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
891 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
892 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
893 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
899 * Go through the disk queues to initiate sandbagged IO;
900 * go through the inodes to write those that have been modified;
901 * initiate the writing of the super block if it has been modified.
903 * Note: we are always called with the filesystem marked `MPBUSY'.
906 ext2_sync(mp, waitfor, cred, p)
912 struct vnode *nvp, *vp;
914 struct ufsmount *ump = VFSTOUFS(mp);
915 struct ext2_sb_info *fs;
916 int error, allerror = 0;
919 if (fs->s_dirt != 0 && fs->s_rd_only != 0) { /* XXX */
920 printf("fs = %s\n", fs->fs_fsmnt);
921 panic("ext2_sync: rofs mod");
924 * Write back each (modified) inode.
926 simple_lock(&mntvnode_slock);
928 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) {
930 * If the vnode that we are about to sync is no longer
931 * associated with this mount point, start over.
933 if (vp->v_mount != mp)
935 simple_lock(&vp->v_interlock);
936 nvp = TAILQ_NEXT(vp, v_nmntvnodes);
938 if (vp->v_type == VNON ||
940 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
941 (TAILQ_EMPTY(&vp->v_dirtyblkhd) || waitfor == MNT_LAZY))) {
942 simple_unlock(&vp->v_interlock);
945 simple_unlock(&mntvnode_slock);
946 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p);
948 simple_lock(&mntvnode_slock);
953 if ((error = VOP_FSYNC(vp, cred, waitfor, p)) != 0)
955 VOP_UNLOCK(vp, 0, p);
957 simple_lock(&mntvnode_slock);
959 simple_unlock(&mntvnode_slock);
961 * Force stale file system control information to be flushed.
963 if (waitfor != MNT_LAZY) {
964 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, p);
965 if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) != 0)
967 VOP_UNLOCK(ump->um_devvp, 0, p);
973 * Write back modified superblock.
975 if (fs->s_dirt != 0) {
977 fs->s_es->s_wtime = time_second;
978 if ((error = ext2_sbupdate(ump, waitfor)) != 0)
985 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it
986 * in from disk. If it is in core, wait for the lock bit to clear, then
987 * return the inode locked. Detection and handling of mount points must be
988 * done by the calling routine.
991 ext2_vget(mp, ino, vpp)
996 register struct ext2_sb_info *fs;
997 register struct inode *ip;
998 struct ufsmount *ump;
1008 if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
1012 * Lock out the creation of new entries in the FFS hash table in
1013 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate
1016 if (ext2fs_inode_hash_lock) {
1017 while (ext2fs_inode_hash_lock) {
1018 ext2fs_inode_hash_lock = -1;
1019 tsleep(&ext2fs_inode_hash_lock, PVM, "e2vget", 0);
1023 ext2fs_inode_hash_lock = 1;
1026 * If this MALLOC() is performed after the getnewvnode()
1027 * it might block, leaving a vnode with a NULL v_data to be
1028 * found by ext2_sync() if a sync happens to fire right then,
1029 * which will cause a panic because ext2_sync() blindly
1030 * dereferences vp->v_data (as well it should).
1032 MALLOC(ip, struct inode *, sizeof(struct inode), M_EXT2NODE, M_WAITOK);
1034 /* Allocate a new vnode/inode. */
1035 if ((error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) != 0) {
1036 if (ext2fs_inode_hash_lock < 0)
1037 wakeup(&ext2fs_inode_hash_lock);
1038 ext2fs_inode_hash_lock = 0;
1040 FREE(ip, M_EXT2NODE);
1043 bzero((caddr_t)ip, sizeof(struct inode));
1044 lockinit(&ip->i_lock, PINOD, "ext2in", 0, 0);
1047 ip->i_e2fs = fs = ump->um_e2fs;
1051 for (i = 0; i < MAXQUOTAS; i++)
1052 ip->i_dquot[i] = NODQUOT;
1055 * Put it onto its hash chain and lock it so that other requests for
1056 * this inode will block if they arrive while we are sleeping waiting
1057 * for old data structures to be purged or for the contents of the
1058 * disk portion of this inode to be read.
1062 if (ext2fs_inode_hash_lock < 0)
1063 wakeup(&ext2fs_inode_hash_lock);
1064 ext2fs_inode_hash_lock = 0;
1066 /* Read in the disk contents for the inode, copy into the inode. */
1068 printf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino)));
1070 if ((error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
1071 (int)fs->s_blocksize, NOCRED, &bp)) != 0) {
1073 * The inode does not contain anything useful, so it would
1074 * be misleading to leave it on its hash chain. With mode
1075 * still zero, it will be unlinked and returned to the free
1083 /* convert ext2 inode to dinode */
1084 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE *
1085 ino_to_fsbo(fs, ino)), &ip->i_din);
1086 ip->i_block_group = ino_to_cg(fs, ino);
1087 ip->i_next_alloc_block = 0;
1088 ip->i_next_alloc_goal = 0;
1089 ip->i_prealloc_count = 0;
1090 ip->i_prealloc_block = 0;
1091 /* now we want to make sure that block pointers for unused
1092 blocks are zeroed out - ext2_balloc depends on this
1093 although for regular files and directories only
1095 if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) {
1096 used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize;
1097 for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)
1101 ext2_print_inode(ip);
1106 * Initialize the vnode from the inode, check for aliases.
1107 * Note that the underlying vnode may have changed.
1109 if ((error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) != 0) {
1115 * Finish inode initialization now that aliasing has been resolved.
1117 ip->i_devvp = ump->um_devvp;
1120 * Set up a generation number for this inode if it does not
1121 * already have one. This should only happen on old filesystems.
1123 if (ip->i_gen == 0) {
1124 ip->i_gen = random() / 2 + 1;
1125 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1126 ip->i_flag |= IN_MODIFIED;
1133 * File handle to vnode
1135 * Have to be really careful about stale file handles:
1136 * - check that the inode number is valid
1137 * - call ext2_vget() to get the locked inode
1138 * - check for an unallocated inode (i_mode == 0)
1139 * - check that the given client host has export rights and return
1140 * those rights via. exflagsp and credanonp
1143 ext2_fhtovp(mp, fhp, vpp)
1144 register struct mount *mp;
1148 register struct ufid *ufhp;
1149 struct ext2_sb_info *fs;
1151 ufhp = (struct ufid *)fhp;
1152 fs = VFSTOUFS(mp)->um_e2fs;
1153 if (ufhp->ufid_ino < ROOTINO ||
1154 ufhp->ufid_ino > fs->s_groups_count * fs->s_es->s_inodes_per_group)
1156 return (ufs_fhtovp(mp, ufhp, vpp));
1160 * Vnode pointer to File handle
1164 ext2_vptofh(vp, fhp)
1168 register struct inode *ip;
1169 register struct ufid *ufhp;
1172 ufhp = (struct ufid *)fhp;
1173 ufhp->ufid_len = sizeof(struct ufid);
1174 ufhp->ufid_ino = ip->i_number;
1175 ufhp->ufid_gen = ip->i_gen;
1180 * Write a superblock and associated information back to disk.
1183 ext2_sbupdate(mp, waitfor)
1184 struct ufsmount *mp;
1187 register struct ext2_sb_info *fs = mp->um_e2fs;
1188 register struct ext2_super_block *es = fs->s_es;
1189 register struct buf *bp;
1192 printf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no");
1194 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0);
1195 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block));
1196 if (waitfor == MNT_WAIT)
1202 * The buffers for group descriptors, inode bitmaps and block bitmaps
1203 * are not busy at this point and are (hopefully) written by the
1204 * usual sync mechanism. No need to write them here