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.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
42 #if !defined(__FreeBSD__)
45 #include "opt_quota.h"
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/namei.h>
52 #include <sys/kernel.h>
53 #include <sys/vnode.h>
54 #include <sys/mount.h>
56 #include <sys/fcntl.h>
57 #include <sys/disklabel.h>
58 #include <sys/malloc.h>
61 #include <miscfs/specfs/specdev.h>
63 #include <ufs/ufs/quota.h>
64 #include <ufs/ufs/ufsmount.h>
65 #include <ufs/ufs/inode.h>
66 #include <ufs/ufs/ufs_extern.h>
68 #include <gnu/ext2fs/fs.h>
69 #include <gnu/ext2fs/ext2_extern.h>
70 #include <gnu/ext2fs/ext2_fs.h>
71 #include <gnu/ext2fs/ext2_fs_sb.h>
73 static int ext2_fhtovp __P((struct mount *, struct fid *, struct sockaddr *,
74 struct vnode **, int *, struct ucred **));
75 static int ext2_flushfiles __P((struct mount *mp, int flags, struct proc *p));
76 static int ext2_mount __P((struct mount *,
77 char *, caddr_t, struct nameidata *, struct proc *));
78 static int ext2_mountfs __P((struct vnode *, struct mount *, struct proc *));
79 static int ext2_reload __P((struct mount *mountp, struct ucred *cred,
81 static int ext2_sbupdate __P((struct ufsmount *, int));
82 static int ext2_statfs __P((struct mount *, struct statfs *, struct proc *));
83 static int ext2_sync __P((struct mount *, int, struct ucred *, struct proc *));
84 static int ext2_unmount __P((struct mount *, int, struct proc *));
85 static int ext2_vget __P((struct mount *, ino_t, struct vnode **));
86 static int ext2_vptofh __P((struct vnode *, struct fid *));
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 */
102 #if defined(__FreeBSD__)
103 VFS_SET(ext2fs_vfsops, ext2fs, MOUNT_EXT2FS, 0);
104 #define bsd_malloc malloc
105 #define bsd_free free
108 extern u_long nextgennumber;
110 static int ext2fs_inode_hash_lock;
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 #if !defined(__FreeBSD__)
131 extern struct vnode *rootvp;
133 register struct ext2_sb_info *fs;
134 register struct mount *mp;
135 #if defined(__FreeBSD__)
136 struct proc *p = curproc;
138 struct proc *p = get_proc(); /* XXX */
140 struct ufsmount *ump;
144 if ((error = bdevvp(rootdev, &rootvp))) {
145 printf("ext2_mountroot: can't find rootvp");
148 mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
149 bzero((char *)mp, (u_long)sizeof(struct mount));
150 mp->mnt_op = &ext2fs_vfsops;
151 mp->mnt_flag = MNT_RDONLY;
152 if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERR)
153 mp->mnt_flag |= MNT_NOCLUSTERR;
154 if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERW)
155 mp->mnt_flag |= MNT_NOCLUSTERW;
156 if (error = ext2_mountfs(rootvp, mp, p)) {
157 bsd_free(mp, M_MOUNT);
160 if (error = vfs_lock(mp)) {
161 (void)ext2_unmount(mp, 0, p);
162 bsd_free(mp, M_MOUNT);
165 #if defined(__FreeBSD__)
166 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
168 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
170 mp->mnt_flag |= MNT_ROOTFS;
171 mp->mnt_vnodecovered = NULLVP;
174 bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
175 fs->fs_fsmnt[0] = '/';
176 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
178 (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
180 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
181 (void)ext2_statfs(mp, &mp->mnt_stat, p);
183 inittodr(fs->s_es->s_wtime); /* this helps to set the time */
194 ext2_mount(mp, path, data, ndp, p)
195 register struct mount *mp;
197 caddr_t data; /* this is actually a (struct ufs_args *) */
198 struct nameidata *ndp;
202 struct ufs_args args;
203 struct ufsmount *ump = 0;
204 register struct ext2_sb_info *fs;
208 if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
211 * If updating, check whether changing from read-only to
212 * read/write; if there is no device name, that's all we do.
213 * Disallow clearing MNT_NOCLUSTERR and MNT_NOCLUSTERW flags,
214 * if block device requests.
216 if (mp->mnt_flag & MNT_UPDATE) {
220 if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERR)
221 mp->mnt_flag |= MNT_NOCLUSTERR;
222 if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERW)
223 mp->mnt_flag |= MNT_NOCLUSTERW;
224 if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) {
226 if (mp->mnt_flag & MNT_FORCE)
228 if (vfs_busy(mp, LK_NOWAIT, 0, p))
230 error = ext2_flushfiles(mp, flags, p);
233 if (!error && (mp->mnt_flag & MNT_RELOAD))
234 error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p);
237 if (fs->s_rd_only && (mp->mnt_flag & MNT_WANTRDWR))
239 if (fs->s_rd_only == 0) {
240 /* don't say it's clean */
241 fs->s_es->s_state &= ~EXT2_VALID_FS;
242 ext2_sbupdate(ump, MNT_WAIT);
244 if (args.fspec == 0) {
246 * Process export requests.
248 return (vfs_export(mp, &ump->um_export, &args.export));
252 * Not an update, or updating the name: look up the name
253 * and verify that it refers to a sensible block device.
255 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
256 if (error = namei(ndp))
260 if (devvp->v_type != VBLK) {
264 if (major(devvp->v_rdev) >= nblkdev) {
268 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
269 if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERR)
270 mp->mnt_flag |= MNT_NOCLUSTERR;
271 if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERW)
272 mp->mnt_flag |= MNT_NOCLUSTERW;
273 error = ext2_mountfs(devvp, mp, p);
275 if (devvp != ump->um_devvp)
276 error = EINVAL; /* needs translation */
286 (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
287 bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
288 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
290 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
292 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
293 (void)ext2_statfs(mp, &mp->mnt_stat, p);
298 * checks that the data in the descriptor blocks make sense
299 * this is taken from ext2/super.c
301 static int ext2_check_descriptors (struct ext2_sb_info * sb)
305 unsigned long block = sb->s_es->s_first_data_block;
306 struct ext2_group_desc * gdp = NULL;
308 /* ext2_debug ("Checking group descriptors"); */
310 for (i = 0; i < sb->s_groups_count; i++)
312 /* examine next descriptor block */
313 if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
314 gdp = (struct ext2_group_desc *)
315 sb->s_group_desc[desc_block++]->b_data;
316 if (gdp->bg_block_bitmap < block ||
317 gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
319 printf ("ext2_check_descriptors: "
320 "Block bitmap for group %d"
321 " not in group (block %lu)!",
322 i, (unsigned long) gdp->bg_block_bitmap);
325 if (gdp->bg_inode_bitmap < block ||
326 gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
328 printf ("ext2_check_descriptors: "
329 "Inode bitmap for group %d"
330 " not in group (block %lu)!",
331 i, (unsigned long) gdp->bg_inode_bitmap);
334 if (gdp->bg_inode_table < block ||
335 gdp->bg_inode_table + sb->s_itb_per_group >=
336 block + EXT2_BLOCKS_PER_GROUP(sb))
338 printf ("ext2_check_descriptors: "
339 "Inode table for group %d"
340 " not in group (block %lu)!",
341 i, (unsigned long) gdp->bg_inode_table);
344 block += EXT2_BLOCKS_PER_GROUP(sb);
351 * this computes the fields of the ext2_sb_info structure from the
352 * data in the ext2_super_block structure read in
354 static int compute_sb_data(devvp, es, fs)
355 struct vnode * devvp;
356 struct ext2_super_block * es;
357 struct ext2_sb_info * fs;
361 int logic_sb_block = 1; /* XXX for now */
366 #define V(v) printf(#v"= %d\n", fs->v);
369 fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size;
371 fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size;
373 fs->s_fsbtodb = es->s_log_block_size + 1;
375 fs->s_qbmask = fs->s_blocksize - 1;
377 fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es);
379 fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size;
382 fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size;
384 fs->s_blocks_per_group = es->s_blocks_per_group;
385 V(s_blocks_per_group)
386 fs->s_frags_per_group = es->s_frags_per_group;
388 fs->s_inodes_per_group = es->s_inodes_per_group;
389 V(s_inodes_per_group)
390 fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE;
391 V(s_inodes_per_block)
392 fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block;
394 fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc);
396 /* s_resuid / s_resgid ? */
397 fs->s_groups_count = (es->s_blocks_count -
398 es->s_first_data_block +
399 EXT2_BLOCKS_PER_GROUP(fs) - 1) /
400 EXT2_BLOCKS_PER_GROUP(fs);
402 db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) /
403 EXT2_DESC_PER_BLOCK(fs);
404 fs->s_db_per_group = db_count;
407 fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *),
410 /* adjust logic_sb_block */
411 if(fs->s_blocksize > SBSIZE)
412 /* Godmar thinks: if the blocksize is greater than 1024, then
413 the superblock is logically part of block zero.
417 for (i = 0; i < db_count; i++) {
418 error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1),
419 fs->s_blocksize, NOCRED, &fs->s_group_desc[i]);
421 for (j = 0; j < i; j++)
422 brelse(fs->s_group_desc[j]);
423 bsd_free(fs->s_group_desc, M_UFSMNT);
424 printf("EXT2-fs: unable to read group descriptors (%d)\n", error);
427 /* Set the B_LOCKED flag on the buffer, then brelse() it */
428 LCK_BUF(fs->s_group_desc[i])
430 if(!ext2_check_descriptors(fs)) {
431 for (j = 0; j < db_count; j++)
432 ULCK_BUF(fs->s_group_desc[j])
433 bsd_free(fs->s_group_desc, M_UFSMNT);
434 printf("EXT2-fs: (ext2_check_descriptors failure) "
435 "unable to read group descriptors\n");
439 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
440 fs->s_inode_bitmap_number[i] = 0;
441 fs->s_inode_bitmap[i] = NULL;
442 fs->s_block_bitmap_number[i] = 0;
443 fs->s_block_bitmap[i] = NULL;
445 fs->s_loaded_inode_bitmaps = 0;
446 fs->s_loaded_block_bitmaps = 0;
451 * Reload all incore data for a filesystem (used after running fsck on
452 * the root filesystem and finding things to fix). The filesystem must
453 * be mounted read-only.
455 * Things to do to update the mount:
456 * 1) invalidate all cached meta-data.
457 * 2) re-read superblock from disk.
458 * 3) re-read summary information from disk.
459 * 4) invalidate all inactive vnodes.
460 * 5) invalidate all cached file data.
461 * 6) re-read inode data for all active vnodes.
464 ext2_reload(mountp, cred, p)
465 register struct mount *mountp;
469 register struct vnode *vp, *nvp, *devvp;
472 struct ext2_super_block * es;
473 struct ext2_sb_info *fs;
476 if ((mountp->mnt_flag & MNT_RDONLY) == 0)
479 * Step 1: invalidate all cached meta-data.
481 devvp = VFSTOUFS(mountp)->um_devvp;
482 if (vinvalbuf(devvp, 0, cred, p, 0, 0))
483 panic("ext2_reload: dirty1");
485 * Step 2: re-read superblock from disk.
486 * constants have been adjusted for ext2
488 if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp))
490 es = (struct ext2_super_block *)bp->b_data;
491 if (es->s_magic != EXT2_SUPER_MAGIC) {
492 if(es->s_magic == EXT2_PRE_02B_MAGIC)
493 printf("This filesystem bears the magic number of a pre "
494 "0.2b version of ext2. This is not supported by "
497 printf("Wrong magic number: %x (expected %x for ext2 fs\n",
498 es->s_magic, EXT2_SUPER_MAGIC);
500 return (EIO); /* XXX needs translation */
502 fs = VFSTOUFS(mountp)->um_e2fs;
503 bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block));
505 if(error = compute_sb_data(devvp, es, fs)) {
510 if (fs->fs_sbsize < SBSIZE)
511 bp->b_flags |= B_INVAL;
516 for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
517 nvp = vp->v_mntvnodes.le_next;
519 * Step 4: invalidate all inactive vnodes.
521 if (vp->v_usecount == 0) {
526 * Step 5: invalidate all cached file data.
528 if (vget(vp, LK_EXCLUSIVE, p))
530 if (vinvalbuf(vp, 0, cred, p, 0, 0))
531 panic("ext2_reload: dirty2");
533 * Step 6: re-read inode data for all active vnodes.
537 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
538 (int)fs->s_blocksize, NOCRED, &bp)) {
542 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data +
543 EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)),
547 if (vp->v_mount != mountp)
554 * Common code for mount and mountroot
557 ext2_mountfs(devvp, mp, p)
558 register struct vnode *devvp;
562 register struct ufsmount *ump;
564 register struct ext2_sb_info *fs;
565 struct ext2_super_block * es;
566 dev_t dev = devvp->v_rdev;
567 struct partinfo dpart;
571 #if !defined(__FreeBSD__)
572 extern struct vnode *rootvp;
576 * Disallow multiple mounts of the same device.
577 * Disallow mounting of a device that is currently in use
578 * (except for root, which might share swap device for miniroot).
579 * Flush out any old buffers remaining from a previous use.
581 if (error = vfs_mountedon(devvp))
583 if (vcount(devvp) > 1 && devvp != rootvp)
585 if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))
588 /* turn on this to force it to be read-only */
589 mp->mnt_flag |= MNT_RDONLY;
592 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
593 if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p))
595 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
599 size = dpart.disklab->d_secsize;
604 if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp))
606 es = (struct ext2_super_block *)bp->b_data;
607 if (es->s_magic != EXT2_SUPER_MAGIC) {
608 if(es->s_magic == EXT2_PRE_02B_MAGIC)
609 printf("This filesystem bears the magic number of a pre "
610 "0.2b version of ext2. This is not supported by "
613 printf("Wrong magic number: %x (expected %x for EXT2FS)\n",
614 es->s_magic, EXT2_SUPER_MAGIC);
615 error = EINVAL; /* XXX needs translation */
618 ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
619 bzero((caddr_t)ump, sizeof *ump);
620 /* I don't know whether this is the right strategy. Note that
621 we dynamically allocate both a ext2_sb_info and a ext2_super_block
622 while Linux keeps the super block in a locked buffer
624 ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info),
626 ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block),
628 bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block));
629 if(error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)) {
636 fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */
637 if (!(fs->s_es->s_state & EXT2_VALID_FS)) {
638 printf("WARNING: %s was not properly dismounted\n",
641 /* if the fs is not mounted read-only, make sure the super block is
642 always written back on a sync()
645 fs->s_dirt = 1; /* mark it modified */
646 fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */
648 mp->mnt_data = (qaddr_t)ump;
649 mp->mnt_stat.f_fsid.val[0] = (long)dev;
650 mp->mnt_stat.f_fsid.val[1] = MOUNT_EXT2FS;
651 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
652 mp->mnt_flag |= MNT_LOCAL;
655 ump->um_devvp = devvp;
656 /* setting those two parameters allows us to use
657 ufs_bmap w/o changse !
659 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs);
660 ump->um_bptrtodb = fs->s_es->s_log_block_size + 1;
661 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs);
662 for (i = 0; i < MAXQUOTAS; i++)
663 ump->um_quotas[i] = NULLVP;
664 devvp->v_specflags |= SI_MOUNTEDON;
666 ext2_sbupdate(ump, MNT_WAIT);
671 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
673 bsd_free(ump->um_fs, M_UFSMNT);
674 bsd_free(ump, M_UFSMNT);
675 mp->mnt_data = (qaddr_t)0;
681 * unmount system call
684 ext2_unmount(mp, mntflags, p)
689 register struct ufsmount *ump;
690 register struct ext2_sb_info *fs;
691 int error, flags, ronly, i;
694 if (mntflags & MNT_FORCE) {
695 if (mp->mnt_flag & MNT_ROOTFS)
699 if (error = ext2_flushfiles(mp, flags, p))
703 ronly = fs->s_rd_only;
705 fs->s_es->s_state |= EXT2_VALID_FS; /* was fs_clean = 1 */
706 ext2_sbupdate(ump, MNT_WAIT);
709 /* release buffers containing group descriptors */
710 for(i = 0; i < fs->s_db_per_group; i++)
711 ULCK_BUF(fs->s_group_desc[i])
713 /* release cached inode/block bitmaps */
714 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
715 if (fs->s_inode_bitmap[i])
716 ULCK_BUF(fs->s_inode_bitmap[i])
718 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
719 if (fs->s_block_bitmap[i])
720 ULCK_BUF(fs->s_block_bitmap[i])
722 ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
723 error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
725 vrele(ump->um_devvp);
726 bsd_free(fs->s_es, M_UFSMNT);
727 bsd_free(fs, M_UFSMNT);
728 bsd_free(ump, M_UFSMNT);
729 mp->mnt_data = (qaddr_t)0;
730 mp->mnt_flag &= ~MNT_LOCAL;
735 * Flush out all the files in a filesystem.
738 ext2_flushfiles(mp, flags, p)
739 register struct mount *mp;
743 register struct ufsmount *ump;
751 if (mp->mnt_flag & MNT_QUOTA) {
752 if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags))
754 for (i = 0; i < MAXQUOTAS; i++) {
755 if (ump->um_quotas[i] == NULLVP)
760 * Here we fall through to vflush again to ensure
761 * that we have gotten rid of all the system vnodes.
765 error = vflush(mp, NULLVP, flags);
770 * Get file system statistics.
771 * taken from ext2/super.c ext2_statfs
774 ext2_statfs(mp, sbp, p)
776 register struct statfs *sbp;
779 unsigned long overhead;
780 unsigned long overhead_per_group;
782 register struct ufsmount *ump;
783 register struct ext2_sb_info *fs;
784 register struct ext2_super_block *es;
790 if (es->s_magic != EXT2_SUPER_MAGIC)
791 panic("ext2_statfs - magic number spoiled");
794 * Compute the overhead (FS structures)
796 overhead_per_group = 1 /* super block */ +
798 1 /* block bitmap */ +
799 1 /* inode bitmap */ +
801 overhead = es->s_first_data_block +
802 fs->s_groups_count * overhead_per_group;
804 sbp->f_type = MOUNT_EXT2FS;
805 sbp->f_bsize = EXT2_FRAG_SIZE(fs);
806 sbp->f_iosize = EXT2_BLOCK_SIZE(fs);
807 sbp->f_blocks = es->s_blocks_count - overhead;
808 sbp->f_bfree = es->s_free_blocks_count;
809 sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count;
810 sbp->f_files = es->s_inodes_count;
811 sbp->f_ffree = es->s_free_inodes_count;
812 if (sbp != &mp->mnt_stat) {
813 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
814 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
815 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
816 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
822 * Go through the disk queues to initiate sandbagged IO;
823 * go through the inodes to write those that have been modified;
824 * initiate the writing of the super block if it has been modified.
826 * Note: we are always called with the filesystem marked `MPBUSY'.
829 ext2_sync(mp, waitfor, cred, p)
835 register struct vnode *vp;
836 register struct inode *ip;
837 register struct ufsmount *ump = VFSTOUFS(mp);
838 register struct ext2_sb_info *fs;
839 int error, allerror = 0;
843 * Write back modified superblock.
844 * Consistency check that the superblock
845 * is still in the buffer cache.
848 #if !defined(__FreeBSD__)
852 if (fs->s_rd_only != 0) { /* XXX */
853 printf("fs = %s\n", fs->fs_fsmnt);
854 panic("update: rofs mod");
857 #if !defined(__FreeBSD__)
860 fs->s_es->s_wtime = time.tv_sec;
861 allerror = ext2_sbupdate(ump, waitfor);
864 * Write back each (modified) inode.
867 for (vp = mp->mnt_vnodelist.lh_first;
869 vp = vp->v_mntvnodes.le_next) {
871 * If the vnode that we are about to sync is no longer
872 * associated with this mount point, start over.
874 if (vp->v_mount != mp)
876 if (VOP_ISLOCKED(vp))
880 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
881 vp->v_dirtyblkhd.lh_first == NULL)
883 if (vget(vp, LK_EXCLUSIVE, p))
885 if (error = VOP_FSYNC(vp, cred, waitfor, p))
890 * Force stale file system control information to be flushed.
892 if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p))
901 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it
902 * in from disk. If it is in core, wait for the lock bit to clear, then
903 * return the inode locked. Detection and handling of mount points must be
904 * done by the calling routine.
907 ext2_vget(mp, ino, vpp)
912 register struct ext2_sb_info *fs;
913 register struct inode *ip;
914 struct ufsmount *ump;
924 if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
929 * Lock out the creation of new entries in the FFS hash table in
930 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate
933 if (ext2fs_inode_hash_lock) {
934 while (ext2fs_inode_hash_lock) {
935 ext2fs_inode_hash_lock = -1;
936 tsleep(&ext2fs_inode_hash_lock, PVM, "ffsvgt", 0);
940 ext2fs_inode_hash_lock = 1;
943 /* Allocate a new vnode/inode. */
944 if (error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) {
948 /* I don't really know what this 'type' does. I suppose it's some kind
949 * of memory accounting. Let's just book this memory on FFS's account
950 * If I'm not mistaken, this stuff isn't implemented anyway in Lites
952 type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */
953 MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK);
957 bzero((caddr_t)ip, sizeof(struct inode));
960 ip->i_e2fs = fs = ump->um_e2fs;
964 for (i = 0; i < MAXQUOTAS; i++)
965 ip->i_dquot[i] = NODQUOT;
968 * Put it onto its hash chain and lock it so that other requests for
969 * this inode will block if they arrive while we are sleeping waiting
970 * for old data structures to be purged or for the contents of the
971 * disk portion of this inode to be read.
976 if (ext2fs_inode_hash_lock < 0)
977 wakeup(&ext2fs_inode_hash_lock);
978 ext2fs_inode_hash_lock = 0;
981 /* Read in the disk contents for the inode, copy into the inode. */
982 /* Read in the disk contents for the inode, copy into the inode. */
984 printf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino)));
986 if (error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
987 (int)fs->s_blocksize, NOCRED, &bp)) {
989 * The inode does not contain anything useful, so it would
990 * be misleading to leave it on its hash chain. With mode
991 * still zero, it will be unlinked and returned to the free
999 /* convert ext2 inode to dinode */
1000 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE *
1001 ino_to_fsbo(fs, ino)), &ip->i_din);
1002 ip->i_block_group = ino_to_cg(fs, ino);
1003 ip->i_next_alloc_block = 0;
1004 ip->i_next_alloc_goal = 0;
1005 ip->i_prealloc_count = 0;
1006 ip->i_prealloc_block = 0;
1007 /* now we want to make sure that block pointers for unused
1008 blocks are zeroed out - ext2_balloc depends on this
1009 although for regular files and directories only
1011 if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) {
1012 used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize;
1013 for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)
1017 ext2_print_inode(ip);
1022 * Initialize the vnode from the inode, check for aliases.
1023 * Note that the underlying vnode may have changed.
1025 if (error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) {
1031 * Finish inode initialization now that aliasing has been resolved.
1033 ip->i_devvp = ump->um_devvp;
1036 * Set up a generation number for this inode if it does not
1037 * already have one. This should only happen on old filesystems.
1039 if (ip->i_gen == 0) {
1040 #if !defined(__FreeBSD__)
1041 struct timeval time;
1044 if (++nextgennumber < (u_long)time.tv_sec)
1045 nextgennumber = time.tv_sec;
1046 ip->i_gen = nextgennumber;
1047 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1048 ip->i_flag |= IN_MODIFIED;
1055 * File handle to vnode
1057 * Have to be really careful about stale file handles:
1058 * - check that the inode number is valid
1059 * - call ext2_vget() to get the locked inode
1060 * - check for an unallocated inode (i_mode == 0)
1061 * - check that the given client host has export rights and return
1062 * those rights via. exflagsp and credanonp
1065 ext2_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
1066 register struct mount *mp;
1068 struct sockaddr *nam;
1071 struct ucred **credanonp;
1073 register struct ufid *ufhp;
1074 struct ext2_sb_info *fs;
1076 ufhp = (struct ufid *)fhp;
1077 fs = VFSTOUFS(mp)->um_e2fs;
1078 if (ufhp->ufid_ino < ROOTINO ||
1079 ufhp->ufid_ino >= fs->s_groups_count * fs->s_es->s_inodes_per_group)
1081 return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp));
1085 * Vnode pointer to File handle
1089 ext2_vptofh(vp, fhp)
1093 register struct inode *ip;
1094 register struct ufid *ufhp;
1097 ufhp = (struct ufid *)fhp;
1098 ufhp->ufid_len = sizeof(struct ufid);
1099 ufhp->ufid_ino = ip->i_number;
1100 ufhp->ufid_gen = ip->i_gen;
1105 * Write a superblock and associated information back to disk.
1108 ext2_sbupdate(mp, waitfor)
1109 struct ufsmount *mp;
1112 register struct ext2_sb_info *fs = mp->um_e2fs;
1113 register struct ext2_super_block *es = fs->s_es;
1114 register struct buf *bp;
1117 printf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no");
1119 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0);
1120 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block));
1121 if (waitfor == MNT_WAIT)
1127 * The buffers for group descriptors, inode bitmaps and block bitmaps
1128 * are not busy at this point and are (hopefully) written by the
1129 * usual sync mechanism. No need to write them here