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>
57 #include <sys/fcntl.h>
58 #include <sys/disklabel.h>
59 #include <sys/malloc.h>
62 #include <miscfs/specfs/specdev.h>
64 #include <ufs/ufs/quota.h>
65 #include <ufs/ufs/ufsmount.h>
66 #include <ufs/ufs/inode.h>
67 #include <ufs/ufs/ufs_extern.h>
69 #include <gnu/ext2fs/fs.h>
70 #include <gnu/ext2fs/ext2_extern.h>
71 #include <gnu/ext2fs/ext2_fs.h>
72 #include <gnu/ext2fs/ext2_fs_sb.h>
74 static int ext2_fhtovp __P((struct mount *, struct fid *, struct sockaddr *,
75 struct vnode **, int *, struct ucred **));
76 static int ext2_flushfiles __P((struct mount *mp, int flags, struct proc *p));
77 static int ext2_mount __P((struct mount *,
78 char *, caddr_t, struct nameidata *, struct proc *));
79 static int ext2_mountfs __P((struct vnode *, struct mount *, struct proc *));
80 static int ext2_reload __P((struct mount *mountp, struct ucred *cred,
82 static int ext2_sbupdate __P((struct ufsmount *, int));
83 static int ext2_statfs __P((struct mount *, struct statfs *, struct proc *));
84 static int ext2_sync __P((struct mount *, int, struct ucred *, struct proc *));
85 static int ext2_unmount __P((struct mount *, int, struct proc *));
86 static int ext2_vget __P((struct mount *, ino_t, struct vnode **));
87 static int ext2_vptofh __P((struct vnode *, struct fid *));
89 static struct vfsops ext2fs_vfsops = {
91 ufs_start, /* empty function */
93 ufs_root, /* root inode via vget */
94 ufs_quotactl, /* does operations associated with quotas */
103 #if defined(__FreeBSD__)
104 VFS_SET(ext2fs_vfsops, ext2fs, MOUNT_EXT2FS, 0);
105 #define bsd_malloc malloc
106 #define bsd_free free
109 extern u_long nextgennumber;
111 static int ext2fs_inode_hash_lock;
114 static int compute_sb_data __P((struct vnode * devvp,
115 struct ext2_super_block * es,
116 struct ext2_sb_info * fs));
119 static int ext2_mountroot __P((void));
122 * Called by main() when ext2fs is going to be mounted as root.
124 * Name is updated by mount(8) after booting.
126 #define ROOTNAME "root_device"
131 #if !defined(__FreeBSD__)
132 extern struct vnode *rootvp;
134 register struct ext2_sb_info *fs;
135 register struct mount *mp;
136 #if defined(__FreeBSD__)
137 struct proc *p = curproc;
139 struct proc *p = get_proc(); /* XXX */
141 struct ufsmount *ump;
145 if ((error = bdevvp(rootdev, &rootvp))) {
146 printf("ext2_mountroot: can't find rootvp");
149 mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
150 bzero((char *)mp, (u_long)sizeof(struct mount));
151 mp->mnt_op = &ext2fs_vfsops;
152 mp->mnt_flag = MNT_RDONLY;
153 if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERR)
154 mp->mnt_flag |= MNT_NOCLUSTERR;
155 if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERW)
156 mp->mnt_flag |= MNT_NOCLUSTERW;
157 if (error = ext2_mountfs(rootvp, mp, p)) {
158 bsd_free(mp, M_MOUNT);
161 if (error = vfs_lock(mp)) {
162 (void)ext2_unmount(mp, 0, p);
163 bsd_free(mp, M_MOUNT);
166 #if defined(__FreeBSD__)
167 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
169 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
171 mp->mnt_flag |= MNT_ROOTFS;
172 mp->mnt_vnodecovered = NULLVP;
175 bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
176 fs->fs_fsmnt[0] = '/';
177 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
179 (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
181 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
182 (void)ext2_statfs(mp, &mp->mnt_stat, p);
184 inittodr(fs->s_es->s_wtime); /* this helps to set the time */
195 ext2_mount(mp, path, data, ndp, p)
196 register struct mount *mp;
198 caddr_t data; /* this is actually a (struct ufs_args *) */
199 struct nameidata *ndp;
203 struct ufs_args args;
204 struct ufsmount *ump = 0;
205 register struct ext2_sb_info *fs;
209 if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
212 * If updating, check whether changing from read-only to
213 * read/write; if there is no device name, that's all we do.
214 * Disallow clearing MNT_NOCLUSTERR and MNT_NOCLUSTERW flags,
215 * if block device requests.
217 if (mp->mnt_flag & MNT_UPDATE) {
221 if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERR)
222 mp->mnt_flag |= MNT_NOCLUSTERR;
223 if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERW)
224 mp->mnt_flag |= MNT_NOCLUSTERW;
225 if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) {
227 if (mp->mnt_flag & MNT_FORCE)
229 if (vfs_busy(mp, LK_NOWAIT, 0, p))
231 error = ext2_flushfiles(mp, flags, p);
234 if (!error && (mp->mnt_flag & MNT_RELOAD))
235 error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p);
238 if (fs->s_rd_only && (mp->mnt_flag & MNT_WANTRDWR))
240 if (fs->s_rd_only == 0) {
241 /* don't say it's clean */
242 fs->s_es->s_state &= ~EXT2_VALID_FS;
243 ext2_sbupdate(ump, MNT_WAIT);
245 if (args.fspec == 0) {
247 * Process export requests.
249 return (vfs_export(mp, &ump->um_export, &args.export));
253 * Not an update, or updating the name: look up the name
254 * and verify that it refers to a sensible block device.
256 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
257 if (error = namei(ndp))
261 if (devvp->v_type != VBLK) {
265 if (major(devvp->v_rdev) >= nblkdev) {
269 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
270 if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERR)
271 mp->mnt_flag |= MNT_NOCLUSTERR;
272 if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERW)
273 mp->mnt_flag |= MNT_NOCLUSTERW;
274 error = ext2_mountfs(devvp, mp, p);
276 if (devvp != ump->um_devvp)
277 error = EINVAL; /* needs translation */
287 (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
288 bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
289 bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
291 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
293 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
294 (void)ext2_statfs(mp, &mp->mnt_stat, p);
299 * checks that the data in the descriptor blocks make sense
300 * this is taken from ext2/super.c
302 static int ext2_check_descriptors (struct ext2_sb_info * sb)
306 unsigned long block = sb->s_es->s_first_data_block;
307 struct ext2_group_desc * gdp = NULL;
309 /* ext2_debug ("Checking group descriptors"); */
311 for (i = 0; i < sb->s_groups_count; i++)
313 /* examine next descriptor block */
314 if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
315 gdp = (struct ext2_group_desc *)
316 sb->s_group_desc[desc_block++]->b_data;
317 if (gdp->bg_block_bitmap < block ||
318 gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
320 printf ("ext2_check_descriptors: "
321 "Block bitmap for group %d"
322 " not in group (block %lu)!",
323 i, (unsigned long) gdp->bg_block_bitmap);
326 if (gdp->bg_inode_bitmap < block ||
327 gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb))
329 printf ("ext2_check_descriptors: "
330 "Inode bitmap for group %d"
331 " not in group (block %lu)!",
332 i, (unsigned long) gdp->bg_inode_bitmap);
335 if (gdp->bg_inode_table < block ||
336 gdp->bg_inode_table + sb->s_itb_per_group >=
337 block + EXT2_BLOCKS_PER_GROUP(sb))
339 printf ("ext2_check_descriptors: "
340 "Inode table for group %d"
341 " not in group (block %lu)!",
342 i, (unsigned long) gdp->bg_inode_table);
345 block += EXT2_BLOCKS_PER_GROUP(sb);
352 * this computes the fields of the ext2_sb_info structure from the
353 * data in the ext2_super_block structure read in
355 static int compute_sb_data(devvp, es, fs)
356 struct vnode * devvp;
357 struct ext2_super_block * es;
358 struct ext2_sb_info * fs;
362 int logic_sb_block = 1; /* XXX for now */
367 #define V(v) printf(#v"= %d\n", fs->v);
370 fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size;
372 fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size;
374 fs->s_fsbtodb = es->s_log_block_size + 1;
376 fs->s_qbmask = fs->s_blocksize - 1;
378 fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es);
380 fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size;
383 fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size;
385 fs->s_blocks_per_group = es->s_blocks_per_group;
386 V(s_blocks_per_group)
387 fs->s_frags_per_group = es->s_frags_per_group;
389 fs->s_inodes_per_group = es->s_inodes_per_group;
390 V(s_inodes_per_group)
391 fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE;
392 V(s_inodes_per_block)
393 fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block;
395 fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc);
397 /* s_resuid / s_resgid ? */
398 fs->s_groups_count = (es->s_blocks_count -
399 es->s_first_data_block +
400 EXT2_BLOCKS_PER_GROUP(fs) - 1) /
401 EXT2_BLOCKS_PER_GROUP(fs);
403 db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) /
404 EXT2_DESC_PER_BLOCK(fs);
405 fs->s_db_per_group = db_count;
408 fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *),
411 /* adjust logic_sb_block */
412 if(fs->s_blocksize > SBSIZE)
413 /* Godmar thinks: if the blocksize is greater than 1024, then
414 the superblock is logically part of block zero.
418 for (i = 0; i < db_count; i++) {
419 error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1),
420 fs->s_blocksize, NOCRED, &fs->s_group_desc[i]);
422 for (j = 0; j < i; j++)
423 brelse(fs->s_group_desc[j]);
424 bsd_free(fs->s_group_desc, M_UFSMNT);
425 printf("EXT2-fs: unable to read group descriptors (%d)\n", error);
428 /* Set the B_LOCKED flag on the buffer, then brelse() it */
429 LCK_BUF(fs->s_group_desc[i])
431 if(!ext2_check_descriptors(fs)) {
432 for (j = 0; j < db_count; j++)
433 ULCK_BUF(fs->s_group_desc[j])
434 bsd_free(fs->s_group_desc, M_UFSMNT);
435 printf("EXT2-fs: (ext2_check_descriptors failure) "
436 "unable to read group descriptors\n");
440 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
441 fs->s_inode_bitmap_number[i] = 0;
442 fs->s_inode_bitmap[i] = NULL;
443 fs->s_block_bitmap_number[i] = 0;
444 fs->s_block_bitmap[i] = NULL;
446 fs->s_loaded_inode_bitmaps = 0;
447 fs->s_loaded_block_bitmaps = 0;
452 * Reload all incore data for a filesystem (used after running fsck on
453 * the root filesystem and finding things to fix). The filesystem must
454 * be mounted read-only.
456 * Things to do to update the mount:
457 * 1) invalidate all cached meta-data.
458 * 2) re-read superblock from disk.
459 * 3) re-read summary information from disk.
460 * 4) invalidate all inactive vnodes.
461 * 5) invalidate all cached file data.
462 * 6) re-read inode data for all active vnodes.
465 ext2_reload(mountp, cred, p)
466 register struct mount *mountp;
470 register struct vnode *vp, *nvp, *devvp;
473 struct ext2_super_block * es;
474 struct ext2_sb_info *fs;
477 if ((mountp->mnt_flag & MNT_RDONLY) == 0)
480 * Step 1: invalidate all cached meta-data.
482 devvp = VFSTOUFS(mountp)->um_devvp;
483 if (vinvalbuf(devvp, 0, cred, p, 0, 0))
484 panic("ext2_reload: dirty1");
486 * Step 2: re-read superblock from disk.
487 * constants have been adjusted for ext2
489 if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp))
491 es = (struct ext2_super_block *)bp->b_data;
492 if (es->s_magic != EXT2_SUPER_MAGIC) {
493 if(es->s_magic == EXT2_PRE_02B_MAGIC)
494 printf("This filesystem bears the magic number of a pre "
495 "0.2b version of ext2. This is not supported by "
498 printf("Wrong magic number: %x (expected %x for ext2 fs\n",
499 es->s_magic, EXT2_SUPER_MAGIC);
501 return (EIO); /* XXX needs translation */
503 fs = VFSTOUFS(mountp)->um_e2fs;
504 bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block));
506 if(error = compute_sb_data(devvp, es, fs)) {
511 if (fs->fs_sbsize < SBSIZE)
512 bp->b_flags |= B_INVAL;
517 for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
518 nvp = vp->v_mntvnodes.le_next;
520 * Step 4: invalidate all inactive vnodes.
522 if (vp->v_usecount == 0) {
527 * Step 5: invalidate all cached file data.
529 if (vget(vp, LK_EXCLUSIVE, p))
531 if (vinvalbuf(vp, 0, cred, p, 0, 0))
532 panic("ext2_reload: dirty2");
534 * Step 6: re-read inode data for all active vnodes.
538 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
539 (int)fs->s_blocksize, NOCRED, &bp)) {
543 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data +
544 EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)),
548 if (vp->v_mount != mountp)
555 * Common code for mount and mountroot
558 ext2_mountfs(devvp, mp, p)
559 register struct vnode *devvp;
563 register struct ufsmount *ump;
565 register struct ext2_sb_info *fs;
566 struct ext2_super_block * es;
567 dev_t dev = devvp->v_rdev;
568 struct partinfo dpart;
572 #if !defined(__FreeBSD__)
573 extern struct vnode *rootvp;
577 * Disallow multiple mounts of the same device.
578 * Disallow mounting of a device that is currently in use
579 * (except for root, which might share swap device for miniroot).
580 * Flush out any old buffers remaining from a previous use.
582 if (error = vfs_mountedon(devvp))
584 if (vcount(devvp) > 1 && devvp != rootvp)
586 if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))
589 /* turn on this to force it to be read-only */
590 mp->mnt_flag |= MNT_RDONLY;
593 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
594 if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p))
596 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
600 size = dpart.disklab->d_secsize;
605 if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp))
607 es = (struct ext2_super_block *)bp->b_data;
608 if (es->s_magic != EXT2_SUPER_MAGIC) {
609 if(es->s_magic == EXT2_PRE_02B_MAGIC)
610 printf("This filesystem bears the magic number of a pre "
611 "0.2b version of ext2. This is not supported by "
614 printf("Wrong magic number: %x (expected %x for EXT2FS)\n",
615 es->s_magic, EXT2_SUPER_MAGIC);
616 error = EINVAL; /* XXX needs translation */
619 ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
620 bzero((caddr_t)ump, sizeof *ump);
621 /* I don't know whether this is the right strategy. Note that
622 we dynamically allocate both a ext2_sb_info and a ext2_super_block
623 while Linux keeps the super block in a locked buffer
625 ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info),
627 ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block),
629 bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block));
630 if(error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)) {
637 fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */
638 if (!(fs->s_es->s_state & EXT2_VALID_FS)) {
639 printf("WARNING: %s was not properly dismounted\n",
642 /* if the fs is not mounted read-only, make sure the super block is
643 always written back on a sync()
646 fs->s_dirt = 1; /* mark it modified */
647 fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */
649 mp->mnt_data = (qaddr_t)ump;
650 mp->mnt_stat.f_fsid.val[0] = (long)dev;
651 mp->mnt_stat.f_fsid.val[1] = MOUNT_EXT2FS;
652 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
653 mp->mnt_flag |= MNT_LOCAL;
656 ump->um_devvp = devvp;
657 /* setting those two parameters allows us to use
658 ufs_bmap w/o changse !
660 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs);
661 ump->um_bptrtodb = fs->s_es->s_log_block_size + 1;
662 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs);
663 for (i = 0; i < MAXQUOTAS; i++)
664 ump->um_quotas[i] = NULLVP;
665 devvp->v_specflags |= SI_MOUNTEDON;
667 ext2_sbupdate(ump, MNT_WAIT);
672 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
674 bsd_free(ump->um_fs, M_UFSMNT);
675 bsd_free(ump, M_UFSMNT);
676 mp->mnt_data = (qaddr_t)0;
682 * unmount system call
685 ext2_unmount(mp, mntflags, p)
690 register struct ufsmount *ump;
691 register struct ext2_sb_info *fs;
692 int error, flags, ronly, i;
695 if (mntflags & MNT_FORCE) {
696 if (mp->mnt_flag & MNT_ROOTFS)
700 if (error = ext2_flushfiles(mp, flags, p))
704 ronly = fs->s_rd_only;
706 fs->s_es->s_state |= EXT2_VALID_FS; /* was fs_clean = 1 */
707 ext2_sbupdate(ump, MNT_WAIT);
710 /* release buffers containing group descriptors */
711 for(i = 0; i < fs->s_db_per_group; i++)
712 ULCK_BUF(fs->s_group_desc[i])
714 /* release cached inode/block bitmaps */
715 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
716 if (fs->s_inode_bitmap[i])
717 ULCK_BUF(fs->s_inode_bitmap[i])
719 for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
720 if (fs->s_block_bitmap[i])
721 ULCK_BUF(fs->s_block_bitmap[i])
723 ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
724 error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
726 vrele(ump->um_devvp);
727 bsd_free(fs->s_es, M_UFSMNT);
728 bsd_free(fs, M_UFSMNT);
729 bsd_free(ump, M_UFSMNT);
730 mp->mnt_data = (qaddr_t)0;
731 mp->mnt_flag &= ~MNT_LOCAL;
736 * Flush out all the files in a filesystem.
739 ext2_flushfiles(mp, flags, p)
740 register struct mount *mp;
744 register struct ufsmount *ump;
752 if (mp->mnt_flag & MNT_QUOTA) {
753 if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags))
755 for (i = 0; i < MAXQUOTAS; i++) {
756 if (ump->um_quotas[i] == NULLVP)
761 * Here we fall through to vflush again to ensure
762 * that we have gotten rid of all the system vnodes.
766 error = vflush(mp, NULLVP, flags);
771 * Get file system statistics.
772 * taken from ext2/super.c ext2_statfs
775 ext2_statfs(mp, sbp, p)
777 register struct statfs *sbp;
780 unsigned long overhead;
781 unsigned long overhead_per_group;
783 register struct ufsmount *ump;
784 register struct ext2_sb_info *fs;
785 register struct ext2_super_block *es;
791 if (es->s_magic != EXT2_SUPER_MAGIC)
792 panic("ext2_statfs - magic number spoiled");
795 * Compute the overhead (FS structures)
797 overhead_per_group = 1 /* super block */ +
799 1 /* block bitmap */ +
800 1 /* inode bitmap */ +
802 overhead = es->s_first_data_block +
803 fs->s_groups_count * overhead_per_group;
805 sbp->f_type = MOUNT_EXT2FS;
806 sbp->f_bsize = EXT2_FRAG_SIZE(fs);
807 sbp->f_iosize = EXT2_BLOCK_SIZE(fs);
808 sbp->f_blocks = es->s_blocks_count - overhead;
809 sbp->f_bfree = es->s_free_blocks_count;
810 sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count;
811 sbp->f_files = es->s_inodes_count;
812 sbp->f_ffree = es->s_free_inodes_count;
813 if (sbp != &mp->mnt_stat) {
814 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
815 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
816 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
817 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
823 * Go through the disk queues to initiate sandbagged IO;
824 * go through the inodes to write those that have been modified;
825 * initiate the writing of the super block if it has been modified.
827 * Note: we are always called with the filesystem marked `MPBUSY'.
830 ext2_sync(mp, waitfor, cred, p)
836 register struct vnode *vp;
837 register struct inode *ip;
838 register struct ufsmount *ump = VFSTOUFS(mp);
839 register struct ext2_sb_info *fs;
840 int error, allerror = 0;
844 * Write back modified superblock.
845 * Consistency check that the superblock
846 * is still in the buffer cache.
849 #if !defined(__FreeBSD__)
853 if (fs->s_rd_only != 0) { /* XXX */
854 printf("fs = %s\n", fs->fs_fsmnt);
855 panic("update: rofs mod");
858 #if !defined(__FreeBSD__)
861 fs->s_es->s_wtime = time.tv_sec;
862 allerror = ext2_sbupdate(ump, waitfor);
865 * Write back each (modified) inode.
868 for (vp = mp->mnt_vnodelist.lh_first;
870 vp = vp->v_mntvnodes.le_next) {
872 * If the vnode that we are about to sync is no longer
873 * associated with this mount point, start over.
875 if (vp->v_mount != mp)
877 if (VOP_ISLOCKED(vp))
881 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
882 vp->v_dirtyblkhd.lh_first == NULL)
884 if (vget(vp, LK_EXCLUSIVE, p))
886 if (error = VOP_FSYNC(vp, cred, waitfor, p))
891 * Force stale file system control information to be flushed.
893 if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p))
902 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it
903 * in from disk. If it is in core, wait for the lock bit to clear, then
904 * return the inode locked. Detection and handling of mount points must be
905 * done by the calling routine.
908 ext2_vget(mp, ino, vpp)
913 register struct ext2_sb_info *fs;
914 register struct inode *ip;
915 struct ufsmount *ump;
925 if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
930 * Lock out the creation of new entries in the FFS hash table in
931 * case getnewvnode() or MALLOC() blocks, otherwise a duplicate
934 if (ext2fs_inode_hash_lock) {
935 while (ext2fs_inode_hash_lock) {
936 ext2fs_inode_hash_lock = -1;
937 tsleep(&ext2fs_inode_hash_lock, PVM, "ffsvgt", 0);
941 ext2fs_inode_hash_lock = 1;
944 /* Allocate a new vnode/inode. */
945 if (error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) {
949 /* I don't really know what this 'type' does. I suppose it's some kind
950 * of memory accounting. Let's just book this memory on FFS's account
951 * If I'm not mistaken, this stuff isn't implemented anyway in Lites
953 type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */
954 MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK);
958 bzero((caddr_t)ip, sizeof(struct inode));
961 ip->i_e2fs = fs = ump->um_e2fs;
965 for (i = 0; i < MAXQUOTAS; i++)
966 ip->i_dquot[i] = NODQUOT;
969 * Put it onto its hash chain and lock it so that other requests for
970 * this inode will block if they arrive while we are sleeping waiting
971 * for old data structures to be purged or for the contents of the
972 * disk portion of this inode to be read.
977 if (ext2fs_inode_hash_lock < 0)
978 wakeup(&ext2fs_inode_hash_lock);
979 ext2fs_inode_hash_lock = 0;
982 /* Read in the disk contents for the inode, copy into the inode. */
983 /* Read in the disk contents for the inode, copy into the inode. */
985 printf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino)));
987 if (error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
988 (int)fs->s_blocksize, NOCRED, &bp)) {
990 * The inode does not contain anything useful, so it would
991 * be misleading to leave it on its hash chain. With mode
992 * still zero, it will be unlinked and returned to the free
1000 /* convert ext2 inode to dinode */
1001 ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE *
1002 ino_to_fsbo(fs, ino)), &ip->i_din);
1003 ip->i_block_group = ino_to_cg(fs, ino);
1004 ip->i_next_alloc_block = 0;
1005 ip->i_next_alloc_goal = 0;
1006 ip->i_prealloc_count = 0;
1007 ip->i_prealloc_block = 0;
1008 /* now we want to make sure that block pointers for unused
1009 blocks are zeroed out - ext2_balloc depends on this
1010 although for regular files and directories only
1012 if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) {
1013 used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize;
1014 for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)
1018 ext2_print_inode(ip);
1023 * Initialize the vnode from the inode, check for aliases.
1024 * Note that the underlying vnode may have changed.
1026 if (error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) {
1032 * Finish inode initialization now that aliasing has been resolved.
1034 ip->i_devvp = ump->um_devvp;
1037 * Set up a generation number for this inode if it does not
1038 * already have one. This should only happen on old filesystems.
1040 if (ip->i_gen == 0) {
1041 #if !defined(__FreeBSD__)
1042 struct timeval time;
1045 if (++nextgennumber < (u_long)time.tv_sec)
1046 nextgennumber = time.tv_sec;
1047 ip->i_gen = nextgennumber;
1048 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1049 ip->i_flag |= IN_MODIFIED;
1056 * File handle to vnode
1058 * Have to be really careful about stale file handles:
1059 * - check that the inode number is valid
1060 * - call ext2_vget() to get the locked inode
1061 * - check for an unallocated inode (i_mode == 0)
1062 * - check that the given client host has export rights and return
1063 * those rights via. exflagsp and credanonp
1066 ext2_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
1067 register struct mount *mp;
1069 struct sockaddr *nam;
1072 struct ucred **credanonp;
1074 register struct ufid *ufhp;
1075 struct ext2_sb_info *fs;
1077 ufhp = (struct ufid *)fhp;
1078 fs = VFSTOUFS(mp)->um_e2fs;
1079 if (ufhp->ufid_ino < ROOTINO ||
1080 ufhp->ufid_ino >= fs->s_groups_count * fs->s_es->s_inodes_per_group)
1082 return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp));
1086 * Vnode pointer to File handle
1090 ext2_vptofh(vp, fhp)
1094 register struct inode *ip;
1095 register struct ufid *ufhp;
1098 ufhp = (struct ufid *)fhp;
1099 ufhp->ufid_len = sizeof(struct ufid);
1100 ufhp->ufid_ino = ip->i_number;
1101 ufhp->ufid_gen = ip->i_gen;
1106 * Write a superblock and associated information back to disk.
1109 ext2_sbupdate(mp, waitfor)
1110 struct ufsmount *mp;
1113 register struct ext2_sb_info *fs = mp->um_e2fs;
1114 register struct ext2_super_block *es = fs->s_es;
1115 register struct buf *bp;
1118 printf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no");
1120 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0);
1121 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block));
1122 if (waitfor == MNT_WAIT)
1128 * The buffers for group descriptors, inode bitmaps and block bitmaps
1129 * are not busy at this point and are (hopefully) written by the
1130 * usual sync mechanism. No need to write them here