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ffs_vfsops.c
1463 lines (1290 loc) · 34.7 KB
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ffs_vfsops.c
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/* $OpenBSD: ffs_vfsops.c,v 1.198 2024/02/03 18:51:58 beck Exp $ */
/* $NetBSD: ffs_vfsops.c,v 1.19 1996/02/09 22:22:26 christos Exp $ */
/*
* Copyright (c) 1989, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ffs_vfsops.c 8.14 (Berkeley) 11/28/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/mbuf.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/sysctl.h>
#include <sys/pool.h>
#include <sys/dkio.h>
#include <sys/disk.h>
#include <sys/specdev.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ufs/dirhash.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <uvm/uvm_extern.h>
int ffs_sbupdate(struct ufsmount *, int);
int ffs_reload_vnode(struct vnode *, void *);
int ffs_sync_vnode(struct vnode *, void *);
int ffs_validate(struct fs *);
void ffs1_compat_read(struct fs *, struct ufsmount *, daddr_t);
void ffs1_compat_write(struct fs *, struct ufsmount *);
const struct vfsops ffs_vfsops = {
.vfs_mount = ffs_mount,
.vfs_start = ufs_start,
.vfs_unmount = ffs_unmount,
.vfs_root = ufs_root,
.vfs_quotactl = ufs_quotactl,
.vfs_statfs = ffs_statfs,
.vfs_sync = ffs_sync,
.vfs_vget = ffs_vget,
.vfs_fhtovp = ffs_fhtovp,
.vfs_vptofh = ffs_vptofh,
.vfs_init = ffs_init,
.vfs_sysctl = ffs_sysctl,
.vfs_checkexp = ufs_check_export,
};
struct inode_vtbl ffs_vtbl = {
.iv_truncate = ffs_truncate,
.iv_update = ffs_update,
.iv_inode_alloc = ffs_inode_alloc,
.iv_inode_free = ffs_inode_free,
.iv_buf_alloc = ffs_balloc,
.iv_bufatoff = ffs_bufatoff
};
int
ffs_checkrange(struct mount *mp, uint32_t ino)
{
struct buf *bp;
struct cg *cgp;
struct fs *fs;
struct ufsmount *ump;
int cg, error;
fs = VFSTOUFS(mp)->um_fs;
if (ino < ROOTINO || ino >= fs->fs_ncg * fs->fs_ipg)
return ESTALE;
/*
* Need to check if inode is initialized because ffsv2 does
* lazy initialization and we can get here from nfs_fhtovp
*/
if (fs->fs_magic != FS_UFS2_MAGIC)
return 0;
cg = ino_to_cg(fs, ino);
ump = VFSTOUFS(mp);
error = bread(ump->um_devvp, fsbtodb(fs, cgtod(fs, cg)),
(int)fs->fs_cgsize, &bp);
if (error)
return error;
cgp = (struct cg *)bp->b_data;
if (!cg_chkmagic(cgp)) {
brelse(bp);
return ESTALE;
}
brelse(bp);
if (cg * fs->fs_ipg + cgp->cg_initediblk < ino)
return ESTALE;
return 0;
}
/*
* Called by main() when ufs is going to be mounted as root.
*/
struct pool ffs_ino_pool;
struct pool ffs_dinode1_pool;
#ifdef FFS2
struct pool ffs_dinode2_pool;
#endif
int
ffs_mountroot(void)
{
struct fs *fs;
struct mount *mp;
struct proc *p = curproc; /* XXX */
struct ufsmount *ump;
int error;
/*
* Get vnodes for swapdev and rootdev.
*/
swapdev_vp = NULL;
if ((error = bdevvp(swapdev, &swapdev_vp)) ||
(error = bdevvp(rootdev, &rootvp))) {
printf("ffs_mountroot: can't setup bdevvp's\n");
if (swapdev_vp)
vrele(swapdev_vp);
return (error);
}
if ((error = vfs_rootmountalloc("ffs", "root_device", &mp)) != 0) {
vrele(swapdev_vp);
vrele(rootvp);
return (error);
}
if ((error = ffs_mountfs(rootvp, mp, p)) != 0) {
vfs_unbusy(mp);
vfs_mount_free(mp);
vrele(swapdev_vp);
vrele(rootvp);
return (error);
}
TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
ump = VFSTOUFS(mp);
fs = ump->um_fs;
strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, sizeof(fs->fs_fsmnt));
(void)ffs_statfs(mp, &mp->mnt_stat, p);
vfs_unbusy(mp);
inittodr(fs->fs_time);
return (0);
}
/*
* VFS Operations.
*
* mount system call
*/
int
ffs_mount(struct mount *mp, const char *path, void *data,
struct nameidata *ndp, struct proc *p)
{
struct vnode *devvp;
struct ufs_args *args = data;
struct ufsmount *ump = NULL;
struct fs *fs;
char fname[MNAMELEN];
char fspec[MNAMELEN];
int error = 0, flags;
int ronly;
/*
* If updating, check whether changing from read-only to
* read/write; if there is no device name, that's all we do.
*/
if (mp->mnt_flag & MNT_UPDATE) {
ump = VFSTOUFS(mp);
fs = ump->um_fs;
devvp = ump->um_devvp;
error = 0;
ronly = fs->fs_ronly;
if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
/* Flush any dirty data */
VFS_SYNC(mp, MNT_WAIT, 0, p->p_ucred, p);
/*
* Get rid of files open for writing.
*/
flags = WRITECLOSE;
if (args == NULL)
flags |= IGNORECLEAN;
if (mp->mnt_flag & MNT_FORCE)
flags |= FORCECLOSE;
error = ffs_flushfiles(mp, flags, p);
mp->mnt_flag |= MNT_RDONLY;
ronly = 1;
}
if (!error && (mp->mnt_flag & MNT_RELOAD))
error = ffs_reload(mp, ndp->ni_cnd.cn_cred, p);
if (error)
goto error_1;
if (ronly && (mp->mnt_flag & MNT_WANTRDWR)) {
if (fs->fs_clean == 0) {
if (mp->mnt_flag & MNT_FORCE) {
printf(
"WARNING: %s was not properly unmounted\n",
fs->fs_fsmnt);
} else {
printf(
"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
fs->fs_fsmnt);
error = EROFS;
goto error_1;
}
}
fs->fs_contigdirs = malloc((u_long)fs->fs_ncg,
M_UFSMNT, M_WAITOK|M_ZERO);
ronly = 0;
}
if (args == NULL)
goto success;
if (args->fspec == NULL) {
/*
* Process export requests.
*/
error = vfs_export(mp, &ump->um_export,
&args->export_info);
if (error)
goto error_1;
else
goto success;
}
}
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
error = copyinstr(args->fspec, fspec, sizeof(fspec), NULL);
if (error)
goto error_1;
if (disk_map(fspec, fname, MNAMELEN, DM_OPENBLCK) == -1)
memcpy(fname, fspec, sizeof(fname));
NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fname, p);
if ((error = namei(ndp)) != 0)
goto error_1;
devvp = ndp->ni_vp;
if (devvp->v_type != VBLK) {
error = ENOTBLK;
goto error_2;
}
if (major(devvp->v_rdev) >= nblkdev) {
error = ENXIO;
goto error_2;
}
if (mp->mnt_flag & MNT_UPDATE) {
/*
* UPDATE
* If it's not the same vnode, or at least the same device
* then it's not correct.
*/
if (devvp != ump->um_devvp) {
if (devvp->v_rdev == ump->um_devvp->v_rdev) {
vrele(devvp);
} else {
error = EINVAL; /* needs translation */
}
} else
vrele(devvp);
/*
* Update device name only on success
*/
if (!error) {
/*
* Save "mounted from" info for mount point (NULL pad)
*/
memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
strlcpy(mp->mnt_stat.f_mntfromname, fname, MNAMELEN);
memset(mp->mnt_stat.f_mntfromspec, 0, MNAMELEN);
strlcpy(mp->mnt_stat.f_mntfromspec, fspec, MNAMELEN);
}
} else {
/*
* Since this is a new mount, we want the names for
* the device and the mount point copied in. If an
* error occurs, the mountpoint is discarded by the
* upper level code.
*/
memset(mp->mnt_stat.f_mntonname, 0, MNAMELEN);
strlcpy(mp->mnt_stat.f_mntonname, path, MNAMELEN);
memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
strlcpy(mp->mnt_stat.f_mntfromname, fname, MNAMELEN);
memset(mp->mnt_stat.f_mntfromspec, 0, MNAMELEN);
strlcpy(mp->mnt_stat.f_mntfromspec, fspec, MNAMELEN);
error = ffs_mountfs(devvp, mp, p);
}
if (error)
goto error_2;
/*
* Initialize FS stat information in mount struct; uses both
* mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
*
* This code is common to root and non-root mounts
*/
if (args)
memcpy(&mp->mnt_stat.mount_info.ufs_args, args, sizeof(*args));
VFS_STATFS(mp, &mp->mnt_stat, p);
success:
if (path && (mp->mnt_flag & MNT_UPDATE)) {
/* Update clean flag after changing read-onlyness. */
fs = ump->um_fs;
if (ronly != fs->fs_ronly) {
fs->fs_ronly = ronly;
fs->fs_clean = ronly &&
(fs->fs_flags & FS_UNCLEAN) == 0 ? 1 : 0;
if (ronly)
free(fs->fs_contigdirs, M_UFSMNT, fs->fs_ncg);
}
ffs_sbupdate(ump, MNT_WAIT);
#if 0
if (ronly) {
int force = 0;
/*
* Updating mount to readonly. Try a cache flush.
* Ignore error because the ioctl may not be supported.
*/
VOP_IOCTL(ump->um_devvp, DIOCCACHESYNC, &force,
FWRITE, FSCRED, p);
}
#endif
}
return (0);
error_2: /* error with devvp held */
vrele (devvp);
error_1: /* no state to back out */
return (error);
}
struct ffs_reload_args {
struct fs *fs;
struct proc *p;
struct ucred *cred;
struct vnode *devvp;
};
int
ffs_reload_vnode(struct vnode *vp, void *args)
{
struct ffs_reload_args *fra = args;
struct inode *ip;
struct buf *bp;
int error;
/*
* Step 4: invalidate all inactive vnodes.
*/
if (vp->v_usecount == 0) {
vgonel(vp, fra->p);
return (0);
}
/*
* Step 5: invalidate all cached file data.
*/
if (vget(vp, LK_EXCLUSIVE))
return (0);
if (vinvalbuf(vp, 0, fra->cred, fra->p, 0, INFSLP))
panic("ffs_reload: dirty2");
/*
* Step 6: re-read inode data for all active vnodes.
*/
ip = VTOI(vp);
error = bread(fra->devvp,
fsbtodb(fra->fs, ino_to_fsba(fra->fs, ip->i_number)),
(int)fra->fs->fs_bsize, &bp);
if (error) {
brelse(bp);
vput(vp);
return (error);
}
if (fra->fs->fs_magic == FS_UFS1_MAGIC)
*ip->i_din1 = *((struct ufs1_dinode *)bp->b_data +
ino_to_fsbo(fra->fs, ip->i_number));
#ifdef FFS2
else
*ip->i_din2 = *((struct ufs2_dinode *)bp->b_data +
ino_to_fsbo(fra->fs, ip->i_number));
#endif /* FFS2 */
ip->i_effnlink = DIP(ip, nlink);
brelse(bp);
vput(vp);
return (0);
}
/*
* Reload all incore data for a filesystem (used after running fsck on
* the root filesystem and finding things to fix). The filesystem must
* be mounted read-only.
*
* Things to do to update the mount:
* 1) invalidate all cached meta-data.
* 2) re-read superblock from disk.
* 3) re-read summary information from disk.
* 4) invalidate all inactive vnodes.
* 5) invalidate all cached file data.
* 6) re-read inode data for all active vnodes.
*/
int
ffs_reload(struct mount *mountp, struct ucred *cred, struct proc *p)
{
struct vnode *devvp;
caddr_t space;
struct fs *fs, *newfs;
int i, blks, size, error;
int32_t *lp;
struct buf *bp = NULL;
struct ffs_reload_args fra;
if ((mountp->mnt_flag & MNT_RDONLY) == 0)
return (EINVAL);
/*
* Step 1: invalidate all cached meta-data.
*/
devvp = VFSTOUFS(mountp)->um_devvp;
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, 0, cred, p, 0, INFSLP);
VOP_UNLOCK(devvp);
if (error)
panic("ffs_reload: dirty1");
/*
* Step 2: re-read superblock from disk.
*/
fs = VFSTOUFS(mountp)->um_fs;
error = bread(devvp, fs->fs_sblockloc / DEV_BSIZE, SBSIZE, &bp);
if (error) {
brelse(bp);
return (error);
}
newfs = (struct fs *)bp->b_data;
if (ffs_validate(newfs) == 0) {
brelse(bp);
return (EINVAL);
}
/*
* Copy pointer fields back into superblock before copying in XXX
* new superblock. These should really be in the ufsmount. XXX
* Note that important parameters (eg fs_ncg) are unchanged.
*/
newfs->fs_csp = fs->fs_csp;
newfs->fs_maxcluster = fs->fs_maxcluster;
newfs->fs_ronly = fs->fs_ronly;
memcpy(fs, newfs, fs->fs_sbsize);
if (fs->fs_sbsize < SBSIZE)
bp->b_flags |= B_INVAL;
brelse(bp);
VFSTOUFS(mountp)->um_maxsymlinklen = fs->fs_maxsymlinklen;
ffs1_compat_read(fs, VFSTOUFS(mountp), fs->fs_sblockloc);
ffs_oldfscompat(fs);
(void)ffs_statfs(mountp, &mountp->mnt_stat, p);
/*
* Step 3: re-read summary information from disk.
*/
blks = howmany(fs->fs_cssize, fs->fs_fsize);
space = (caddr_t)fs->fs_csp;
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, &bp);
if (error) {
brelse(bp);
return (error);
}
memcpy(space, bp->b_data, size);
space += size;
brelse(bp);
}
/*
* We no longer know anything about clusters per cylinder group.
*/
if (fs->fs_contigsumsize > 0) {
lp = fs->fs_maxcluster;
for (i = 0; i < fs->fs_ncg; i++)
*lp++ = fs->fs_contigsumsize;
}
fra.p = p;
fra.cred = cred;
fra.fs = fs;
fra.devvp = devvp;
error = vfs_mount_foreach_vnode(mountp, ffs_reload_vnode, &fra);
return (error);
}
/*
* Checks if a super block is sane enough to be mounted.
*/
int
ffs_validate(struct fs *fsp)
{
#ifdef FFS2
if (fsp->fs_magic != FS_UFS2_MAGIC && fsp->fs_magic != FS_UFS1_MAGIC)
return (0); /* Invalid magic */
#else
if (fsp->fs_magic != FS_UFS1_MAGIC)
return (0); /* Invalid magic */
#endif /* FFS2 */
if ((u_int)fsp->fs_bsize > MAXBSIZE)
return (0); /* Invalid block size */
if ((u_int)fsp->fs_bsize < sizeof(struct fs))
return (0); /* Invalid block size */
if ((u_int)fsp->fs_sbsize > SBSIZE)
return (0); /* Invalid super block size */
if ((u_int)fsp->fs_frag > MAXFRAG || fragtbl[fsp->fs_frag] == NULL)
return (0); /* Invalid number of fragments */
if (fsp->fs_inodefmt == FS_42INODEFMT)
return (0); /* Obsolete format, support broken in 2014 */
if (fsp->fs_maxsymlinklen <= 0)
return (0); /* Invalid max size of short symlink */
return (1); /* Super block is okay */
}
/*
* Possible locations for the super-block.
*/
const int sbtry[] = SBLOCKSEARCH;
/*
* Common code for mount and mountroot
*/
int
ffs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p)
{
struct ufsmount *ump;
struct buf *bp;
struct fs *fs;
dev_t dev;
caddr_t space;
daddr_t sbloc;
int error, i, blks, size, ronly;
int32_t *lp;
struct ucred *cred;
u_int64_t maxfilesize; /* XXX */
dev = devvp->v_rdev;
cred = p ? p->p_ucred : NOCRED;
/*
* Disallow multiple mounts of the same device.
* Disallow mounting of a device that is currently in use
* (except for root, which might share swap device for miniroot).
* Flush out any old buffers remaining from a previous use.
*/
if ((error = vfs_mountedon(devvp)) != 0)
return (error);
if (vcount(devvp) > 1 && devvp != rootvp)
return (EBUSY);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, V_SAVE, cred, p, 0, INFSLP);
VOP_UNLOCK(devvp);
if (error)
return (error);
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
if (error)
return (error);
bp = NULL;
ump = NULL;
/*
* Try reading the super-block in each of its possible locations.
*/
for (i = 0; sbtry[i] != -1; i++) {
if (bp != NULL) {
bp->b_flags |= B_NOCACHE;
brelse(bp);
bp = NULL;
}
error = bread(devvp, sbtry[i] / DEV_BSIZE, SBSIZE, &bp);
if (error)
goto out;
fs = (struct fs *) bp->b_data;
sbloc = sbtry[i];
/*
* Do not look for an FFS1 file system at SBLOCK_UFS2. Doing so
* will find the wrong super-block for file systems with 64k
* block size.
*/
if (fs->fs_magic == FS_UFS1_MAGIC && sbloc == SBLOCK_UFS2)
continue;
if (ffs_validate(fs))
break; /* Super block validated */
}
if (sbtry[i] == -1) {
error = EINVAL;
goto out;
}
fs->fs_fmod = 0;
fs->fs_flags &= ~FS_UNCLEAN;
if (fs->fs_clean == 0) {
if (ronly || (mp->mnt_flag & MNT_FORCE)) {
printf(
"WARNING: %s was not properly unmounted\n",
fs->fs_fsmnt);
} else {
printf(
"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
fs->fs_fsmnt);
error = EROFS;
goto out;
}
}
if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
#ifndef SMALL_KERNEL
printf("ffs_mountfs(): obsolete rotational table format, "
"please use fsck_ffs(8) -c 1\n");
#endif
error = EROFS;
goto out;
}
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK|M_ZERO);
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
M_WAITOK);
if (fs->fs_magic == FS_UFS1_MAGIC)
ump->um_fstype = UM_UFS1;
#ifdef FFS2
else
ump->um_fstype = UM_UFS2;
#endif
memcpy(ump->um_fs, bp->b_data, fs->fs_sbsize);
if (fs->fs_sbsize < SBSIZE)
bp->b_flags |= B_INVAL;
brelse(bp);
bp = NULL;
fs = ump->um_fs;
ffs1_compat_read(fs, ump, sbloc);
if (fs->fs_clean == 0)
fs->fs_flags |= FS_UNCLEAN;
fs->fs_ronly = ronly;
size = fs->fs_cssize;
blks = howmany(size, fs->fs_fsize);
if (fs->fs_contigsumsize > 0)
size += fs->fs_ncg * sizeof(int32_t);
space = malloc((u_long)size, M_UFSMNT, M_WAITOK);
fs->fs_csp = (struct csum *)space;
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, &bp);
if (error) {
free(fs->fs_csp, M_UFSMNT, 0);
goto out;
}
memcpy(space, bp->b_data, size);
space += size;
brelse(bp);
bp = NULL;
}
if (fs->fs_contigsumsize > 0) {
fs->fs_maxcluster = lp = (int32_t *)space;
for (i = 0; i < fs->fs_ncg; i++)
*lp++ = fs->fs_contigsumsize;
}
mp->mnt_data = ump;
mp->mnt_stat.f_fsid.val[0] = (long)dev;
/* Use on-disk fsid if it exists, else fake it */
if (fs->fs_id[0] != 0 && fs->fs_id[1] != 0)
mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
else
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
mp->mnt_stat.f_namemax = MAXNAMLEN;
mp->mnt_flag |= MNT_LOCAL;
ump->um_mountp = mp;
ump->um_dev = dev;
ump->um_devvp = devvp;
ump->um_nindir = fs->fs_nindir;
ump->um_bptrtodb = fs->fs_fsbtodb;
ump->um_seqinc = fs->fs_frag;
ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
for (i = 0; i < MAXQUOTAS; i++)
ump->um_quotas[i] = NULLVP;
devvp->v_specmountpoint = mp;
ffs_oldfscompat(fs);
if (ronly)
fs->fs_contigdirs = NULL;
else {
fs->fs_contigdirs = malloc((u_long)fs->fs_ncg,
M_UFSMNT, M_WAITOK|M_ZERO);
}
/*
* Set FS local "last mounted on" information (NULL pad)
*/
memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt));
strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, sizeof(fs->fs_fsmnt));
#if 0
if (mp->mnt_flag & MNT_ROOTFS) {
/*
* Root mount; update timestamp in mount structure.
* this will be used by the common root mount code
* to update the system clock.
*/
mp->mnt_time = fs->fs_time;
}
#endif
/*
* XXX
* Limit max file size. Even though ffs can handle files up to 16TB,
* we do limit the max file to 2^31 pages to prevent overflow of
* a 32-bit unsigned int. The buffer cache has its own checks but
* a little added paranoia never hurts.
*/
ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */
maxfilesize = FS_KERNMAXFILESIZE(PAGE_SIZE, fs);
if (fs->fs_maxfilesize > maxfilesize) /* XXX */
fs->fs_maxfilesize = maxfilesize; /* XXX */
if (ronly == 0) {
fs->fs_fmod = 1;
fs->fs_clean = 0;
error = ffs_sbupdate(ump, MNT_WAIT);
if (error == EROFS)
goto out;
}
return (0);
out:
if (devvp->v_specinfo)
devvp->v_specmountpoint = NULL;
if (bp)
brelse(bp);
vn_lock(devvp, LK_EXCLUSIVE|LK_RETRY);
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p);
VOP_UNLOCK(devvp);
if (ump) {
free(ump->um_fs, M_UFSMNT, ump->um_fs->fs_sbsize);
free(ump, M_UFSMNT, sizeof(*ump));
mp->mnt_data = NULL;
}
return (error);
}
/*
* Sanity checks for old file systems.
*/
int
ffs_oldfscompat(struct fs *fs)
{
int i;
fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */
fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
fs->fs_nrpos = 8; /* XXX */
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
u_int64_t sizepb = fs->fs_bsize; /* XXX */
/* XXX */
fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
for (i = 0; i < NIADDR; i++) { /* XXX */
sizepb *= NINDIR(fs); /* XXX */
fs->fs_maxfilesize += sizepb; /* XXX */
} /* XXX */
fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
} /* XXX */
if (fs->fs_avgfilesize <= 0) /* XXX */
fs->fs_avgfilesize = AVFILESIZ; /* XXX */
if (fs->fs_avgfpdir <= 0) /* XXX */
fs->fs_avgfpdir = AFPDIR; /* XXX */
return (0);
}
/*
* Auxiliary function for reading FFS1 super blocks.
*/
void
ffs1_compat_read(struct fs *fs, struct ufsmount *ump, daddr_t sbloc)
{
if (fs->fs_magic == FS_UFS2_MAGIC)
return; /* UFS2 */
#if 0
if (fs->fs_ffs1_flags & FS_FLAGS_UPDATED)
return; /* Already updated */
#endif
fs->fs_flags = fs->fs_ffs1_flags;
fs->fs_sblockloc = sbloc;
fs->fs_maxbsize = fs->fs_bsize;
fs->fs_time = fs->fs_ffs1_time;
fs->fs_size = fs->fs_ffs1_size;
fs->fs_dsize = fs->fs_ffs1_dsize;
fs->fs_csaddr = fs->fs_ffs1_csaddr;
fs->fs_cstotal.cs_ndir = fs->fs_ffs1_cstotal.cs_ndir;
fs->fs_cstotal.cs_nbfree = fs->fs_ffs1_cstotal.cs_nbfree;
fs->fs_cstotal.cs_nifree = fs->fs_ffs1_cstotal.cs_nifree;
fs->fs_cstotal.cs_nffree = fs->fs_ffs1_cstotal.cs_nffree;
fs->fs_ffs1_flags |= FS_FLAGS_UPDATED;
}
/*
* Auxiliary function for writing FFS1 super blocks.
*/
void
ffs1_compat_write(struct fs *fs, struct ufsmount *ump)
{
if (fs->fs_magic != FS_UFS1_MAGIC)
return; /* UFS2 */
fs->fs_ffs1_time = fs->fs_time;
fs->fs_ffs1_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir;
fs->fs_ffs1_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree;
fs->fs_ffs1_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree;
fs->fs_ffs1_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree;
}
/*
* unmount system call
*/
int
ffs_unmount(struct mount *mp, int mntflags, struct proc *p)
{
struct ufsmount *ump;
struct fs *fs;
int error, flags;
flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
ump = VFSTOUFS(mp);
fs = ump->um_fs;
error = ffs_flushfiles(mp, flags, p);
if (error != 0)
return (error);
if (fs->fs_ronly == 0) {
fs->fs_clean = (fs->fs_flags & FS_UNCLEAN) ? 0 : 1;
error = ffs_sbupdate(ump, MNT_WAIT);
/* ignore write errors if mounted RW on read-only device */
if (error && error != EROFS) {
fs->fs_clean = 0;
return (error);
}
free(fs->fs_contigdirs, M_UFSMNT, fs->fs_ncg);
}
ump->um_devvp->v_specmountpoint = NULL;
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, p, 0, INFSLP);
(void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE,
NOCRED, p);
vput(ump->um_devvp);
free(fs->fs_csp, M_UFSMNT, 0);
free(fs, M_UFSMNT, fs->fs_sbsize);
free(ump, M_UFSMNT, sizeof(*ump));
mp->mnt_data = NULL;
mp->mnt_flag &= ~MNT_LOCAL;
return (0);
}
/*
* Flush out all the files in a filesystem.
*/
int
ffs_flushfiles(struct mount *mp, int flags, struct proc *p)
{
struct ufsmount *ump;
int error;
ump = VFSTOUFS(mp);
if (mp->mnt_flag & MNT_QUOTA) {
int i;
if ((error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) != 0)
return (error);
for (i = 0; i < MAXQUOTAS; i++) {
if (ump->um_quotas[i] == NULLVP)
continue;
quotaoff(p, mp, i);
}
/*
* Here we fall through to vflush again to ensure
* that we have gotten rid of all the system vnodes.
*/
}
/*
* Flush all the files.
*/
if ((error = vflush(mp, NULL, flags)) != 0)
return (error);
/*
* Flush filesystem metadata.
*/
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_FSYNC(ump->um_devvp, p->p_ucred, MNT_WAIT, p);
VOP_UNLOCK(ump->um_devvp);
return (error);
}
/*
* Get file system statistics.
*/
int
ffs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p)