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. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/namei.h>
44 #include <sys/kernel.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
50 #include <sys/endian.h>
51 #include <sys/fcntl.h>
52 #include <sys/malloc.h>
54 #include <sys/mutex.h>
56 #include <geom/geom.h>
57 #include <geom/geom_vfs.h>
59 #include <fs/ext2fs/ext2_mount.h>
60 #include <fs/ext2fs/inode.h>
62 #include <fs/ext2fs/fs.h>
63 #include <fs/ext2fs/ext2fs.h>
64 #include <fs/ext2fs/ext2_dinode.h>
65 #include <fs/ext2fs/ext2_extern.h>
67 static int ext2_flushfiles(struct mount *mp, int flags, struct thread *td);
68 static int ext2_mountfs(struct vnode *, struct mount *);
69 static int ext2_reload(struct mount *mp, struct thread *td);
70 static int ext2_sbupdate(struct ext2mount *, int);
71 static int ext2_cgupdate(struct ext2mount *, int);
72 static vfs_unmount_t ext2_unmount;
73 static vfs_root_t ext2_root;
74 static vfs_statfs_t ext2_statfs;
75 static vfs_sync_t ext2_sync;
76 static vfs_vget_t ext2_vget;
77 static vfs_fhtovp_t ext2_fhtovp;
78 static vfs_mount_t ext2_mount;
80 MALLOC_DEFINE(M_EXT2NODE, "ext2_node", "EXT2 vnode private part");
81 static MALLOC_DEFINE(M_EXT2MNT, "ext2_mount", "EXT2 mount structure");
83 static struct vfsops ext2fs_vfsops = {
84 .vfs_fhtovp = ext2_fhtovp,
85 .vfs_mount = ext2_mount,
86 .vfs_root = ext2_root, /* root inode via vget */
87 .vfs_statfs = ext2_statfs,
88 .vfs_sync = ext2_sync,
89 .vfs_unmount = ext2_unmount,
90 .vfs_vget = ext2_vget,
93 VFS_SET(ext2fs_vfsops, ext2fs, 0);
95 static int ext2_check_sb_compat(struct ext2fs *es, struct cdev *dev,
97 static int compute_sb_data(struct vnode * devvp,
98 struct ext2fs * es, struct m_ext2fs * fs);
100 static const char *ext2_opts[] = { "acls", "async", "noatime", "noclusterr",
101 "noclusterw", "noexec", "export", "force", "from", "multilabel",
102 "suiddir", "nosymfollow", "sync", "union", NULL };
110 ext2_mount(struct mount *mp)
112 struct vfsoptlist *opts;
115 struct ext2mount *ump = NULL;
117 struct nameidata nd, *ndp = &nd;
120 int error, flags, len;
123 opts = mp->mnt_optnew;
125 if (vfs_filteropt(opts, ext2_opts))
128 vfs_getopt(opts, "fspath", (void **)&path, NULL);
129 /* Double-check the length of path.. */
130 if (strlen(path) >= MAXMNTLEN)
131 return (ENAMETOOLONG);
134 error = vfs_getopt(opts, "from", (void **)&fspec, &len);
135 if (!error && fspec[len - 1] != '\0')
139 * If updating, check whether changing from read-only to
140 * read/write; if there is no device name, that's all we do.
142 if (mp->mnt_flag & MNT_UPDATE) {
146 if (fs->e2fs_ronly == 0 &&
147 vfs_flagopt(opts, "ro", NULL, 0)) {
148 error = VFS_SYNC(mp, MNT_WAIT);
152 if (mp->mnt_flag & MNT_FORCE)
154 error = ext2_flushfiles(mp, flags, td);
155 if (error == 0 && fs->e2fs_wasvalid && ext2_cgupdate(ump, MNT_WAIT) == 0) {
156 fs->e2fs->e2fs_state |= E2FS_ISCLEAN;
157 ext2_sbupdate(ump, MNT_WAIT);
160 vfs_flagopt(opts, "ro", &mp->mnt_flag, MNT_RDONLY);
162 g_access(ump->um_cp, 0, -1, 0);
165 if (!error && (mp->mnt_flag & MNT_RELOAD))
166 error = ext2_reload(mp, td);
169 devvp = ump->um_devvp;
170 if (fs->e2fs_ronly && !vfs_flagopt(opts, "ro", NULL, 0)) {
171 if (ext2_check_sb_compat(fs->e2fs, devvp->v_rdev, 0))
175 * If upgrade to read-write by non-root, then verify
176 * that user has necessary permissions on the device.
178 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
179 error = VOP_ACCESS(devvp, VREAD | VWRITE,
182 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
184 VOP_UNLOCK(devvp, 0);
187 VOP_UNLOCK(devvp, 0);
189 error = g_access(ump->um_cp, 0, 1, 0);
194 if ((fs->e2fs->e2fs_state & E2FS_ISCLEAN) == 0 ||
195 (fs->e2fs->e2fs_state & E2FS_ERRORS)) {
196 if (mp->mnt_flag & MNT_FORCE) {
198 "WARNING: %s was not properly dismounted\n", fs->e2fs_fsmnt);
201 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
206 fs->e2fs->e2fs_state &= ~E2FS_ISCLEAN;
207 (void)ext2_cgupdate(ump, MNT_WAIT);
210 mp->mnt_flag &= ~MNT_RDONLY;
213 if (vfs_flagopt(opts, "export", NULL, 0)) {
214 /* Process export requests in vfs_mount.c. */
220 * Not an update, or updating the name: look up the name
221 * and verify that it refers to a sensible disk device.
225 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
226 if ((error = namei(ndp)) != 0)
228 NDFREE(ndp, NDF_ONLY_PNBUF);
231 if (!vn_isdisk(devvp, &error)) {
237 * If mount by non-root, then verify that user has necessary
238 * permissions on the device.
240 * XXXRW: VOP_ACCESS() enough?
243 if ((mp->mnt_flag & MNT_RDONLY) == 0)
245 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
247 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
253 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
254 error = ext2_mountfs(devvp, mp);
256 if (devvp != ump->um_devvp) {
258 return (EINVAL); /* needs translation */
270 * Note that this strncpy() is ok because of a check at the start
273 strncpy(fs->e2fs_fsmnt, path, MAXMNTLEN);
274 fs->e2fs_fsmnt[MAXMNTLEN - 1] = '\0';
275 vfs_mountedfrom(mp, fspec);
280 ext2_check_sb_compat(struct ext2fs *es, struct cdev *dev, int ronly)
284 if (es->e2fs_magic != E2FS_MAGIC) {
285 printf("ext2fs: %s: wrong magic number %#x (expected %#x)\n",
286 devtoname(dev), es->e2fs_magic, E2FS_MAGIC);
289 if (es->e2fs_rev > E2FS_REV0) {
290 mask = es->e2fs_features_incompat & ~(EXT2F_INCOMPAT_SUPP |
291 EXT4F_RO_INCOMPAT_SUPP);
293 printf("WARNING: mount of %s denied due to "
294 "unsupported optional features:\n", devtoname(dev));
296 i < sizeof(incompat)/sizeof(struct ext2_feature);
298 if (mask & incompat[i].mask)
299 printf("%s ", incompat[i].name);
303 mask = es->e2fs_features_rocompat & ~EXT2F_ROCOMPAT_SUPP;
304 if (!ronly && mask) {
305 printf("WARNING: R/W mount of %s denied due to "
306 "unsupported optional features:\n", devtoname(dev));
308 i < sizeof(ro_compat)/sizeof(struct ext2_feature);
310 if (mask & ro_compat[i].mask)
311 printf("%s ", ro_compat[i].name);
320 * This computes the fields of the m_ext2fs structure from the
321 * data in the ext2fs structure read in.
324 compute_sb_data(struct vnode *devvp, struct ext2fs *es,
329 int logic_sb_block = 1; /* XXX for now */
331 uint32_t e2fs_descpb;
333 fs->e2fs_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->e2fs_log_bsize;
334 fs->e2fs_bsize = 1U << fs->e2fs_bshift;
335 fs->e2fs_fsbtodb = es->e2fs_log_bsize + 1;
336 fs->e2fs_qbmask = fs->e2fs_bsize - 1;
337 fs->e2fs_fsize = EXT2_MIN_FRAG_SIZE << es->e2fs_log_fsize;
339 fs->e2fs_fpb = fs->e2fs_bsize / fs->e2fs_fsize;
340 fs->e2fs_bpg = es->e2fs_bpg;
341 fs->e2fs_fpg = es->e2fs_fpg;
342 fs->e2fs_ipg = es->e2fs_ipg;
343 if (es->e2fs_rev == E2FS_REV0) {
344 fs->e2fs_isize = E2FS_REV0_INODE_SIZE;
346 fs->e2fs_isize = es->e2fs_inode_size;
349 * Simple sanity check for superblock inode size value.
351 if (EXT2_INODE_SIZE(fs) < E2FS_REV0_INODE_SIZE ||
352 EXT2_INODE_SIZE(fs) > fs->e2fs_bsize ||
353 (fs->e2fs_isize & (fs->e2fs_isize - 1)) != 0) {
354 printf("ext2fs: invalid inode size %d\n",
359 /* Check for extra isize in big inodes. */
360 if (EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_EXTRA_ISIZE) &&
361 EXT2_INODE_SIZE(fs) < sizeof(struct ext2fs_dinode)) {
362 printf("ext2fs: no space for extra inode timestamps\n");
365 /* Check for group descriptor size */
366 if (EXT2_HAS_INCOMPAT_FEATURE(fs, EXT2F_INCOMPAT_64BIT) &&
367 (es->e3fs_desc_size != sizeof(struct ext2_gd))) {
368 printf("ext2fs: group descriptor size unsupported %d\n",
373 fs->e2fs_ipb = fs->e2fs_bsize / EXT2_INODE_SIZE(fs);
374 fs->e2fs_itpg = fs->e2fs_ipg / fs->e2fs_ipb;
375 /* s_resuid / s_resgid ? */
376 fs->e2fs_gcount = howmany(es->e2fs_bcount - es->e2fs_first_dblock,
377 EXT2_BLOCKS_PER_GROUP(fs));
378 e2fs_descpb = fs->e2fs_bsize / sizeof(struct ext2_gd);
379 db_count = howmany(fs->e2fs_gcount, e2fs_descpb);
380 fs->e2fs_gdbcount = db_count;
381 fs->e2fs_gd = malloc(db_count * fs->e2fs_bsize,
382 M_EXT2MNT, M_WAITOK);
383 fs->e2fs_contigdirs = malloc(fs->e2fs_gcount *
384 sizeof(*fs->e2fs_contigdirs), M_EXT2MNT, M_WAITOK | M_ZERO);
387 * Adjust logic_sb_block.
388 * Godmar thinks: if the blocksize is greater than 1024, then
389 * the superblock is logically part of block zero.
391 if (fs->e2fs_bsize > SBSIZE)
393 for (i = 0; i < db_count; i++) {
395 fsbtodb(fs, logic_sb_block + i + 1),
396 fs->e2fs_bsize, NOCRED, &bp);
398 free(fs->e2fs_contigdirs, M_EXT2MNT);
399 free(fs->e2fs_gd, M_EXT2MNT);
403 e2fs_cgload((struct ext2_gd *)bp->b_data,
405 i * fs->e2fs_bsize / sizeof(struct ext2_gd)],
411 if (EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_GDT_CSUM)) {
412 error = ext2_gd_csum_verify(fs, devvp->v_rdev);
416 /* Initialization for the ext2 Orlov allocator variant. */
417 fs->e2fs_total_dir = 0;
418 for (i = 0; i < fs->e2fs_gcount; i++)
419 fs->e2fs_total_dir += fs->e2fs_gd[i].ext2bgd_ndirs;
421 if (es->e2fs_rev == E2FS_REV0 ||
422 !EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_LARGEFILE))
423 fs->e2fs_maxfilesize = 0x7fffffff;
425 fs->e2fs_maxfilesize = 0xffffffffffff;
426 if (EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE))
427 fs->e2fs_maxfilesize = 0x7fffffffffffffff;
429 if (es->e4fs_flags & E2FS_UNSIGNED_HASH) {
431 } else if ((es->e4fs_flags & E2FS_SIGNED_HASH) == 0) {
432 #ifdef __CHAR_UNSIGNED__
433 es->e4fs_flags |= E2FS_UNSIGNED_HASH;
436 es->e4fs_flags |= E2FS_SIGNED_HASH;
444 * Reload all incore data for a filesystem (used after running fsck on
445 * the root filesystem and finding things to fix). The filesystem must
446 * be mounted read-only.
448 * Things to do to update the mount:
449 * 1) invalidate all cached meta-data.
450 * 2) re-read superblock from disk.
451 * 3) invalidate all cluster summary information.
452 * 4) invalidate all inactive vnodes.
453 * 5) invalidate all cached file data.
454 * 6) re-read inode data for all active vnodes.
455 * XXX we are missing some steps, in particular # 3, this has to be reviewed.
458 ext2_reload(struct mount *mp, struct thread *td)
460 struct vnode *vp, *mvp, *devvp;
469 if ((mp->mnt_flag & MNT_RDONLY) == 0)
472 * Step 1: invalidate all cached meta-data.
474 devvp = VFSTOEXT2(mp)->um_devvp;
475 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
476 if (vinvalbuf(devvp, 0, 0, 0) != 0)
477 panic("ext2_reload: dirty1");
478 VOP_UNLOCK(devvp, 0);
481 * Step 2: re-read superblock from disk.
482 * constants have been adjusted for ext2
484 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
486 es = (struct ext2fs *)bp->b_data;
487 if (ext2_check_sb_compat(es, devvp->v_rdev, 0) != 0) {
489 return (EIO); /* XXX needs translation */
491 fs = VFSTOEXT2(mp)->um_e2fs;
492 bcopy(bp->b_data, fs->e2fs, sizeof(struct ext2fs));
494 if ((error = compute_sb_data(devvp, es, fs)) != 0) {
499 if (fs->fs_sbsize < SBSIZE)
500 bp->b_flags |= B_INVAL;
505 * Step 3: invalidate all cluster summary information.
507 if (fs->e2fs_contigsumsize > 0) {
508 lp = fs->e2fs_maxcluster;
509 sump = fs->e2fs_clustersum;
510 for (i = 0; i < fs->e2fs_gcount; i++, sump++) {
511 *lp++ = fs->e2fs_contigsumsize;
513 bzero(sump->cs_sum, fs->e2fs_contigsumsize + 1);
518 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
520 * Step 4: invalidate all cached file data.
522 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
523 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
526 if (vinvalbuf(vp, 0, 0, 0))
527 panic("ext2_reload: dirty2");
530 * Step 5: re-read inode data for all active vnodes.
533 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
534 (int)fs->e2fs_bsize, NOCRED, &bp);
538 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
541 ext2_ei2i((struct ext2fs_dinode *)((char *)bp->b_data +
542 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number)), ip);
551 * Common code for mount and mountroot.
554 ext2_mountfs(struct vnode *devvp, struct mount *mp)
556 struct ext2mount *ump;
560 struct cdev *dev = devvp->v_rdev;
561 struct g_consumer *cp;
569 int32_t e2fs_maxcontig;
571 ronly = vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0);
572 /* XXX: use VOP_ACESS to check FS perms */
574 error = g_vfs_open(devvp, &cp, "ext2fs", ronly ? 0 : 1);
576 VOP_UNLOCK(devvp, 0);
580 /* XXX: should we check for some sectorsize or 512 instead? */
581 if (((SBSIZE % cp->provider->sectorsize) != 0) ||
582 (SBSIZE < cp->provider->sectorsize)) {
589 bo = &devvp->v_bufobj;
591 bo->bo_ops = g_vfs_bufops;
592 if (devvp->v_rdev->si_iosize_max != 0)
593 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
594 if (mp->mnt_iosize_max > MAXPHYS)
595 mp->mnt_iosize_max = MAXPHYS;
599 if ((error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) != 0)
601 es = (struct ext2fs *)bp->b_data;
602 if (ext2_check_sb_compat(es, dev, ronly) != 0) {
603 error = EINVAL; /* XXX needs translation */
606 if ((es->e2fs_state & E2FS_ISCLEAN) == 0 ||
607 (es->e2fs_state & E2FS_ERRORS)) {
608 if (ronly || (mp->mnt_flag & MNT_FORCE)) {
610 "WARNING: Filesystem was not properly dismounted\n");
613 "WARNING: R/W mount denied. Filesystem is not clean - run fsck\n");
618 ump = malloc(sizeof(*ump), M_EXT2MNT, M_WAITOK | M_ZERO);
621 * I don't know whether this is the right strategy. Note that
622 * we dynamically allocate both an m_ext2fs and an ext2fs
623 * while Linux keeps the super block in a locked buffer.
625 ump->um_e2fs = malloc(sizeof(struct m_ext2fs),
626 M_EXT2MNT, M_WAITOK | M_ZERO);
627 ump->um_e2fs->e2fs = malloc(sizeof(struct ext2fs),
628 M_EXT2MNT, M_WAITOK);
629 mtx_init(EXT2_MTX(ump), "EXT2FS", "EXT2FS Lock", MTX_DEF);
630 bcopy(es, ump->um_e2fs->e2fs, (u_int)sizeof(struct ext2fs));
631 if ((error = compute_sb_data(devvp, ump->um_e2fs->e2fs, ump->um_e2fs)))
635 * Calculate the maximum contiguous blocks and size of cluster summary
636 * array. In FFS this is done by newfs; however, the superblock
637 * in ext2fs doesn't have these variables, so we can calculate
640 e2fs_maxcontig = MAX(1, MAXPHYS / ump->um_e2fs->e2fs_bsize);
641 ump->um_e2fs->e2fs_contigsumsize = MIN(e2fs_maxcontig, EXT2_MAXCONTIG);
642 if (ump->um_e2fs->e2fs_contigsumsize > 0) {
643 size = ump->um_e2fs->e2fs_gcount * sizeof(int32_t);
644 ump->um_e2fs->e2fs_maxcluster = malloc(size, M_EXT2MNT, M_WAITOK);
645 size = ump->um_e2fs->e2fs_gcount * sizeof(struct csum);
646 ump->um_e2fs->e2fs_clustersum = malloc(size, M_EXT2MNT, M_WAITOK);
647 lp = ump->um_e2fs->e2fs_maxcluster;
648 sump = ump->um_e2fs->e2fs_clustersum;
649 for (i = 0; i < ump->um_e2fs->e2fs_gcount; i++, sump++) {
650 *lp++ = ump->um_e2fs->e2fs_contigsumsize;
652 sump->cs_sum = malloc((ump->um_e2fs->e2fs_contigsumsize + 1) *
653 sizeof(int32_t), M_EXT2MNT, M_WAITOK | M_ZERO);
660 fs->e2fs_ronly = ronly; /* ronly is set according to mnt_flags */
663 * If the fs is not mounted read-only, make sure the super block is
664 * always written back on a sync().
666 fs->e2fs_wasvalid = fs->e2fs->e2fs_state & E2FS_ISCLEAN ? 1 : 0;
668 fs->e2fs_fmod = 1; /* mark it modified */
669 fs->e2fs->e2fs_state &= ~E2FS_ISCLEAN; /* set fs invalid */
672 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
673 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
674 mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
676 mp->mnt_flag |= MNT_LOCAL;
680 ump->um_devvp = devvp;
681 ump->um_bo = &devvp->v_bufobj;
685 * Setting those two parameters allowed us to use
686 * ufs_bmap w/o changse!
688 ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs);
689 ump->um_bptrtodb = fs->e2fs->e2fs_log_bsize + 1;
690 ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs);
692 ext2_sbupdate(ump, MNT_WAIT);
694 * Initialize filesystem stat information in mount struct.
697 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED |
710 mtx_destroy(EXT2_MTX(ump));
711 free(ump->um_e2fs->e2fs_gd, M_EXT2MNT);
712 free(ump->um_e2fs->e2fs_contigdirs, M_EXT2MNT);
713 free(ump->um_e2fs->e2fs, M_EXT2MNT);
714 free(ump->um_e2fs, M_EXT2MNT);
715 free(ump, M_EXT2MNT);
722 * Unmount system call.
725 ext2_unmount(struct mount *mp, int mntflags)
727 struct ext2mount *ump;
730 int error, flags, i, ronly;
733 if (mntflags & MNT_FORCE) {
734 if (mp->mnt_flag & MNT_ROOTFS)
738 if ((error = ext2_flushfiles(mp, flags, curthread)) != 0)
742 ronly = fs->e2fs_ronly;
743 if (ronly == 0 && ext2_cgupdate(ump, MNT_WAIT) == 0) {
744 if (fs->e2fs_wasvalid)
745 fs->e2fs->e2fs_state |= E2FS_ISCLEAN;
746 ext2_sbupdate(ump, MNT_WAIT);
750 g_vfs_close(ump->um_cp);
752 vrele(ump->um_devvp);
753 sump = fs->e2fs_clustersum;
754 for (i = 0; i < fs->e2fs_gcount; i++, sump++)
755 free(sump->cs_sum, M_EXT2MNT);
756 free(fs->e2fs_clustersum, M_EXT2MNT);
757 free(fs->e2fs_maxcluster, M_EXT2MNT);
758 free(fs->e2fs_gd, M_EXT2MNT);
759 free(fs->e2fs_contigdirs, M_EXT2MNT);
760 free(fs->e2fs, M_EXT2MNT);
762 free(ump, M_EXT2MNT);
765 mp->mnt_flag &= ~MNT_LOCAL;
771 * Flush out all the files in a filesystem.
774 ext2_flushfiles(struct mount *mp, int flags, struct thread *td)
778 error = vflush(mp, 0, flags, td);
783 * Get filesystem statistics.
786 ext2_statfs(struct mount *mp, struct statfs *sbp)
788 struct ext2mount *ump;
790 uint32_t overhead, overhead_per_group, ngdb;
795 if (fs->e2fs->e2fs_magic != E2FS_MAGIC)
796 panic("ext2_statfs");
799 * Compute the overhead (FS structures)
802 1 /* block bitmap */ +
803 1 /* inode bitmap */ +
805 overhead = fs->e2fs->e2fs_first_dblock +
806 fs->e2fs_gcount * overhead_per_group;
807 if (fs->e2fs->e2fs_rev > E2FS_REV0 &&
808 fs->e2fs->e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) {
809 for (i = 0, ngroups = 0; i < fs->e2fs_gcount; i++) {
810 if (ext2_cg_has_sb(fs, i))
814 ngroups = fs->e2fs_gcount;
816 ngdb = fs->e2fs_gdbcount;
817 if (fs->e2fs->e2fs_rev > E2FS_REV0 &&
818 fs->e2fs->e2fs_features_compat & EXT2F_COMPAT_RESIZE)
819 ngdb += fs->e2fs->e2fs_reserved_ngdb;
820 overhead += ngroups * (1 /* superblock */ + ngdb);
822 sbp->f_bsize = EXT2_FRAG_SIZE(fs);
823 sbp->f_iosize = EXT2_BLOCK_SIZE(fs);
824 sbp->f_blocks = fs->e2fs->e2fs_bcount - overhead;
825 sbp->f_bfree = fs->e2fs->e2fs_fbcount;
826 sbp->f_bavail = sbp->f_bfree - fs->e2fs->e2fs_rbcount;
827 sbp->f_files = fs->e2fs->e2fs_icount;
828 sbp->f_ffree = fs->e2fs->e2fs_ficount;
833 * Go through the disk queues to initiate sandbagged IO;
834 * go through the inodes to write those that have been modified;
835 * initiate the writing of the super block if it has been modified.
837 * Note: we are always called with the filesystem marked `MPBUSY'.
840 ext2_sync(struct mount *mp, int waitfor)
842 struct vnode *mvp, *vp;
845 struct ext2mount *ump = VFSTOEXT2(mp);
847 int error, allerror = 0;
851 if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */
852 printf("fs = %s\n", fs->e2fs_fsmnt);
853 panic("ext2_sync: rofs mod");
857 * Write back each (modified) inode.
860 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
861 if (vp->v_type == VNON) {
867 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
868 (vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
869 waitfor == MNT_LAZY)) {
873 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, td);
875 if (error == ENOENT) {
876 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
881 if ((error = VOP_FSYNC(vp, waitfor, td)) != 0)
888 * Force stale filesystem control information to be flushed.
890 if (waitfor != MNT_LAZY) {
891 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
892 if ((error = VOP_FSYNC(ump->um_devvp, waitfor, td)) != 0)
894 VOP_UNLOCK(ump->um_devvp, 0);
898 * Write back modified superblock.
900 if (fs->e2fs_fmod != 0) {
902 fs->e2fs->e2fs_wtime = time_second;
903 if ((error = ext2_cgupdate(ump, waitfor)) != 0)
910 * Look up an EXT2FS dinode number to find its incore vnode, otherwise read it
911 * in from disk. If it is in core, wait for the lock bit to clear, then
912 * return the inode locked. Detection and handling of mount points must be
913 * done by the calling routine.
916 ext2_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
920 struct ext2mount *ump;
928 error = vfs_hash_get(mp, ino, flags, td, vpp, NULL, NULL);
929 if (error || *vpp != NULL)
933 ip = malloc(sizeof(struct inode), M_EXT2NODE, M_WAITOK | M_ZERO);
935 /* Allocate a new vnode/inode. */
936 if ((error = getnewvnode("ext2fs", mp, &ext2_vnodeops, &vp)) != 0) {
938 free(ip, M_EXT2NODE);
943 ip->i_e2fs = fs = ump->um_e2fs;
947 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
948 error = insmntque(vp, mp);
950 free(ip, M_EXT2NODE);
954 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL);
955 if (error || *vpp != NULL)
958 /* Read in the disk contents for the inode, copy into the inode. */
959 if ((error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
960 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
962 * The inode does not contain anything useful, so it would
963 * be misleading to leave it on its hash chain. With mode
964 * still zero, it will be unlinked and returned to the free
972 /* convert ext2 inode to dinode */
973 ext2_ei2i((struct ext2fs_dinode *)((char *)bp->b_data + EXT2_INODE_SIZE(fs) *
974 ino_to_fsbo(fs, ino)), ip);
975 ip->i_block_group = ino_to_cg(fs, ino);
976 ip->i_next_alloc_block = 0;
977 ip->i_next_alloc_goal = 0;
980 * Now we want to make sure that block pointers for unused
981 * blocks are zeroed out - ext2_balloc depends on this
982 * although for regular files and directories only
984 * If IN_E4EXTENTS is enabled, unused blocks are not zeroed
985 * out because we could corrupt the extent tree.
987 if (!(ip->i_flag & IN_E4EXTENTS) &&
988 (S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode))) {
989 used_blocks = howmany(ip->i_size, fs->e2fs_bsize);
990 for (i = used_blocks; i < EXT2_NDIR_BLOCKS; i++)
994 ext2_print_inode(ip);
999 * Initialize the vnode from the inode, check for aliases.
1000 * Note that the underlying vnode may have changed.
1002 if ((error = ext2_vinit(mp, &ext2_fifoops, &vp)) != 0) {
1009 * Finish inode initialization.
1017 * File handle to vnode
1019 * Have to be really careful about stale file handles:
1020 * - check that the inode number is valid
1021 * - call ext2_vget() to get the locked inode
1022 * - check for an unallocated inode (i_mode == 0)
1023 * - check that the given client host has export rights and return
1024 * those rights via. exflagsp and credanonp
1027 ext2_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp)
1032 struct m_ext2fs *fs;
1035 ufhp = (struct ufid *)fhp;
1036 fs = VFSTOEXT2(mp)->um_e2fs;
1037 if (ufhp->ufid_ino < EXT2_ROOTINO ||
1038 ufhp->ufid_ino > fs->e2fs_gcount * fs->e2fs->e2fs_ipg)
1041 error = VFS_VGET(mp, ufhp->ufid_ino, LK_EXCLUSIVE, &nvp);
1047 if (ip->i_mode == 0 ||
1048 ip->i_gen != ufhp->ufid_gen || ip->i_nlink <= 0) {
1054 vnode_create_vobject(*vpp, 0, curthread);
1059 * Write a superblock and associated information back to disk.
1062 ext2_sbupdate(struct ext2mount *mp, int waitfor)
1064 struct m_ext2fs *fs = mp->um_e2fs;
1065 struct ext2fs *es = fs->e2fs;
1069 bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0, 0);
1070 bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2fs));
1071 if (waitfor == MNT_WAIT)
1077 * The buffers for group descriptors, inode bitmaps and block bitmaps
1078 * are not busy at this point and are (hopefully) written by the
1079 * usual sync mechanism. No need to write them here.
1084 ext2_cgupdate(struct ext2mount *mp, int waitfor)
1086 struct m_ext2fs *fs = mp->um_e2fs;
1088 int i, error = 0, allerror = 0;
1090 allerror = ext2_sbupdate(mp, waitfor);
1092 /* Update gd csums */
1093 if (EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_GDT_CSUM))
1094 ext2_gd_csum_set(fs);
1096 for (i = 0; i < fs->e2fs_gdbcount; i++) {
1097 bp = getblk(mp->um_devvp, fsbtodb(fs,
1098 fs->e2fs->e2fs_first_dblock +
1099 1 /* superblock */ + i), fs->e2fs_bsize, 0, 0, 0);
1100 e2fs_cgsave(&fs->e2fs_gd[
1101 i * fs->e2fs_bsize / sizeof(struct ext2_gd)],
1102 (struct ext2_gd *)bp->b_data, fs->e2fs_bsize);
1103 if (waitfor == MNT_WAIT)
1109 if (!allerror && error)
1115 * Return the root of a filesystem.
1118 ext2_root(struct mount *mp, int flags, struct vnode **vpp)
1123 error = VFS_VGET(mp, EXT2_ROOTINO, LK_EXCLUSIVE, &nvp);