3781f2dcb0
We encountered an interesting situation where the superblock for a file system got written to disk with the "fs_fmod" flag set to one. It appears that this flag is normally supposed to be cleared during ffs_sync(), but we experienced a crash, or some other weird occurrence that left it on the disk set to 1. Later this partition was mounted read-only... and the fs_fmod field was never cleared, causing ffs_sync() to panic "rofs mod" when trying to unmount that filesystem (ffs_vfsops.c: line 790). fix: set this bit to 0 when you load the superblock from disk. (see more complete mail on this to hackers)
1077 lines
26 KiB
C
1077 lines
26 KiB
C
/*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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 8.8 (Berkeley) 4/18/94
|
|
* $Id: ffs_vfsops.c,v 1.41 1996/09/07 17:34:57 dyson Exp $
|
|
*/
|
|
|
|
#include "opt_quota.h"
|
|
|
|
#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/file.h>
|
|
#include <sys/disklabel.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <miscfs/specfs/specdev.h>
|
|
|
|
#include <ufs/ufs/quota.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
#include <ufs/ufs/inode.h>
|
|
#include <ufs/ufs/ufs_extern.h>
|
|
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ffs/ffs_extern.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/vm_prot.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_extern.h>
|
|
|
|
static int ffs_sbupdate __P((struct ufsmount *, int));
|
|
static int ffs_reload __P((struct mount *,struct ucred *,struct proc *));
|
|
static int ffs_oldfscompat __P((struct fs *));
|
|
static int ffs_mount __P((struct mount *,
|
|
char *, caddr_t, struct nameidata *, struct proc *));
|
|
|
|
struct vfsops ufs_vfsops = {
|
|
ffs_mount,
|
|
ufs_start,
|
|
ffs_unmount,
|
|
ufs_root,
|
|
ufs_quotactl,
|
|
ffs_statfs,
|
|
ffs_sync,
|
|
ffs_vget,
|
|
ffs_fhtovp,
|
|
ffs_vptofh,
|
|
ffs_init,
|
|
};
|
|
|
|
VFS_SET(ufs_vfsops, ufs, MOUNT_UFS, 0);
|
|
|
|
extern u_long nextgennumber;
|
|
|
|
|
|
/*
|
|
* ffs_mount
|
|
*
|
|
* Called when mounting local physical media
|
|
*
|
|
* PARAMETERS:
|
|
* mountroot
|
|
* mp mount point structure
|
|
* path NULL (flag for root mount!!!)
|
|
* data <unused>
|
|
* ndp <unused>
|
|
* p process (user credentials check [statfs])
|
|
*
|
|
* mount
|
|
* mp mount point structure
|
|
* path path to mount point
|
|
* data pointer to argument struct in user space
|
|
* ndp mount point namei() return (used for
|
|
* credentials on reload), reused to look
|
|
* up block device.
|
|
* p process (user credentials check)
|
|
*
|
|
* RETURNS: 0 Success
|
|
* !0 error number (errno.h)
|
|
*
|
|
* LOCK STATE:
|
|
*
|
|
* ENTRY
|
|
* mount point is locked
|
|
* EXIT
|
|
* mount point is locked
|
|
*
|
|
* NOTES:
|
|
* A NULL path can be used for a flag since the mount
|
|
* system call will fail with EFAULT in copyinstr in
|
|
* namei() if it is a genuine NULL from the user.
|
|
*/
|
|
static int
|
|
ffs_mount( mp, path, data, ndp, p)
|
|
register struct mount *mp; /* mount struct pointer*/
|
|
char *path; /* path to mount point*/
|
|
caddr_t data; /* arguments to FS specific mount*/
|
|
struct nameidata *ndp; /* mount point credentials*/
|
|
struct proc *p; /* process requesting mount*/
|
|
{
|
|
u_int size;
|
|
int err = 0;
|
|
struct vnode *devvp;
|
|
|
|
struct ufs_args args;
|
|
struct ufsmount *ump = 0;
|
|
register struct fs *fs;
|
|
int flags;
|
|
|
|
/*
|
|
* Use NULL path to flag a root mount
|
|
*/
|
|
if( path == NULL) {
|
|
/*
|
|
***
|
|
* Mounting root file system
|
|
***
|
|
*/
|
|
|
|
/* Get vnode for root device*/
|
|
if( bdevvp( rootdev, &rootvp))
|
|
panic("ffs_mountroot: can't setup bdevvp for root");
|
|
|
|
/*
|
|
* FS specific handling
|
|
*/
|
|
mp->mnt_flag |= MNT_RDONLY; /* XXX globally applicable?*/
|
|
|
|
/*
|
|
* Attempt mount
|
|
*/
|
|
if( ( err = ffs_mountfs(rootvp, mp, p)) != 0) {
|
|
/* fs specific cleanup (if any)*/
|
|
goto error_1;
|
|
}
|
|
|
|
goto dostatfs; /* success*/
|
|
|
|
}
|
|
|
|
/*
|
|
***
|
|
* Mounting non-root file system or updating a file system
|
|
***
|
|
*/
|
|
|
|
/* copy in user arguments*/
|
|
err = copyin(data, (caddr_t)&args, sizeof (struct ufs_args));
|
|
if (err)
|
|
goto error_1; /* can't get arguments*/
|
|
|
|
/*
|
|
* 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;
|
|
err = 0;
|
|
if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
|
|
flags = WRITECLOSE;
|
|
if (mp->mnt_flag & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
if (vfs_busy(mp)) {
|
|
err = EBUSY;
|
|
goto error_1;
|
|
}
|
|
err = ffs_flushfiles(mp, flags, p);
|
|
vfs_unbusy(mp);
|
|
}
|
|
if (!err && (mp->mnt_flag & MNT_RELOAD))
|
|
err = ffs_reload(mp, ndp->ni_cnd.cn_cred, p);
|
|
if (err) {
|
|
goto error_1;
|
|
}
|
|
if (fs->fs_ronly && (mp->mnt_flag & MNT_WANTRDWR)) {
|
|
if (!fs->fs_clean) {
|
|
if (mp->mnt_flag & MNT_FORCE) {
|
|
printf("WARNING: %s was not properly dismounted.\n",fs->fs_fsmnt);
|
|
} else {
|
|
printf("WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck.\n",
|
|
fs->fs_fsmnt);
|
|
err = EPERM;
|
|
goto error_1;
|
|
}
|
|
}
|
|
fs->fs_ronly = 0;
|
|
}
|
|
if (fs->fs_ronly == 0) {
|
|
fs->fs_clean = 0;
|
|
ffs_sbupdate(ump, MNT_WAIT);
|
|
}
|
|
/* if not updating name...*/
|
|
if (args.fspec == 0) {
|
|
/*
|
|
* Process export requests. Jumping to "success"
|
|
* will return the vfs_export() error code.
|
|
*/
|
|
err = vfs_export(mp, &ump->um_export, &args.export);
|
|
goto success;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Not an update, or updating the name: look up the name
|
|
* and verify that it refers to a sensible block device.
|
|
*/
|
|
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
|
|
err = namei(ndp);
|
|
if (err) {
|
|
/* can't get devvp!*/
|
|
goto error_1;
|
|
}
|
|
|
|
devvp = ndp->ni_vp;
|
|
|
|
if (devvp->v_type != VBLK) {
|
|
err = ENOTBLK;
|
|
goto error_2;
|
|
}
|
|
if (major(devvp->v_rdev) >= nblkdev) {
|
|
err = ENXIO;
|
|
goto error_2;
|
|
}
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
/*
|
|
********************
|
|
* UPDATE
|
|
********************
|
|
*/
|
|
|
|
if (devvp != ump->um_devvp)
|
|
err = EINVAL; /* needs translation */
|
|
else
|
|
vrele(devvp);
|
|
/*
|
|
* Update device name only on success
|
|
*/
|
|
if( !err) {
|
|
/* Save "mounted from" info for mount point (NULL pad)*/
|
|
copyinstr( args.fspec,
|
|
mp->mnt_stat.f_mntfromname,
|
|
MNAMELEN - 1,
|
|
&size);
|
|
bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
|
|
}
|
|
} else {
|
|
/*
|
|
********************
|
|
* NEW MOUNT
|
|
********************
|
|
*/
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
/* Save "last mounted on" info for mount point (NULL pad)*/
|
|
copyinstr( path, /* mount point*/
|
|
mp->mnt_stat.f_mntonname, /* save area*/
|
|
MNAMELEN - 1, /* max size*/
|
|
&size); /* real size*/
|
|
bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
|
|
|
|
/* Save "mounted from" info for mount point (NULL pad)*/
|
|
copyinstr( args.fspec, /* device name*/
|
|
mp->mnt_stat.f_mntfromname, /* save area*/
|
|
MNAMELEN - 1, /* max size*/
|
|
&size); /* real size*/
|
|
bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
|
|
|
|
err = ffs_mountfs(devvp, mp, p);
|
|
}
|
|
if (err) {
|
|
goto error_2;
|
|
}
|
|
|
|
dostatfs:
|
|
/*
|
|
* 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
|
|
*/
|
|
(void)VFS_STATFS(mp, &mp->mnt_stat, p);
|
|
|
|
goto success;
|
|
|
|
|
|
error_2: /* error with devvp held*/
|
|
|
|
/* release devvp before failing*/
|
|
vrele(devvp);
|
|
|
|
error_1: /* no state to back out*/
|
|
|
|
success:
|
|
return( err);
|
|
}
|
|
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
static int
|
|
ffs_reload(mp, cred, p)
|
|
register struct mount *mp;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
register struct vnode *vp, *nvp, *devvp;
|
|
struct inode *ip;
|
|
struct csum *space;
|
|
struct buf *bp;
|
|
struct fs *fs;
|
|
int i, blks, size, error;
|
|
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
return (EINVAL);
|
|
/*
|
|
* Step 1: invalidate all cached meta-data.
|
|
*/
|
|
devvp = VFSTOUFS(mp)->um_devvp;
|
|
if (vinvalbuf(devvp, 0, cred, p, 0, 0))
|
|
panic("ffs_reload: dirty1");
|
|
/*
|
|
* Step 2: re-read superblock from disk.
|
|
*/
|
|
error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp);
|
|
if (error)
|
|
return (error);
|
|
fs = (struct fs *)bp->b_data;
|
|
fs->fs_fmod = 0;
|
|
if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
|
|
fs->fs_bsize < sizeof(struct fs)) {
|
|
brelse(bp);
|
|
return (EIO); /* XXX needs translation */
|
|
}
|
|
fs = VFSTOUFS(mp)->um_fs;
|
|
bcopy(&fs->fs_csp[0], &((struct fs *)bp->b_data)->fs_csp[0],
|
|
sizeof(fs->fs_csp));
|
|
bcopy(bp->b_data, fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBSIZE)
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
ffs_oldfscompat(fs);
|
|
/*
|
|
* Step 3: re-read summary information from disk.
|
|
*/
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
space = fs->fs_csp[0];
|
|
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,
|
|
NOCRED, &bp);
|
|
if (error)
|
|
return (error);
|
|
bcopy(bp->b_data, fs->fs_csp[fragstoblks(fs, i)], (u_int)size);
|
|
brelse(bp);
|
|
}
|
|
loop:
|
|
for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
|
|
nvp = vp->v_mntvnodes.le_next;
|
|
/*
|
|
* Step 4: invalidate all inactive vnodes.
|
|
*/
|
|
if (vp->v_usecount == 0) {
|
|
vgone(vp);
|
|
continue;
|
|
}
|
|
/*
|
|
* Step 5: invalidate all cached file data.
|
|
*/
|
|
if (vget(vp, 1))
|
|
goto loop;
|
|
if (vinvalbuf(vp, 0, cred, p, 0, 0))
|
|
panic("ffs_reload: dirty2");
|
|
/*
|
|
* Step 6: re-read inode data for all active vnodes.
|
|
*/
|
|
ip = VTOI(vp);
|
|
error =
|
|
bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
ip->i_din = *((struct dinode *)bp->b_data +
|
|
ino_to_fsbo(fs, ip->i_number));
|
|
brelse(bp);
|
|
vput(vp);
|
|
if (vp->v_mount != mp)
|
|
goto loop;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
int
|
|
ffs_mountfs(devvp, mp, p)
|
|
register struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
struct buf *bp;
|
|
register struct fs *fs;
|
|
dev_t dev = devvp->v_rdev;
|
|
struct partinfo dpart;
|
|
caddr_t base, space;
|
|
int havepart = 0, blks;
|
|
int error, i, size;
|
|
int ronly;
|
|
u_int strsize;
|
|
int ncount;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
error = vfs_mountedon(devvp);
|
|
if (error)
|
|
return (error);
|
|
ncount = vcount(devvp);
|
|
if (devvp->v_object)
|
|
ncount -= 1;
|
|
if (ncount > 1 && devvp != rootvp)
|
|
return (EBUSY);
|
|
error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0);
|
|
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);
|
|
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
|
|
size = DEV_BSIZE;
|
|
else {
|
|
havepart = 1;
|
|
size = dpart.disklab->d_secsize;
|
|
}
|
|
|
|
bp = NULL;
|
|
ump = NULL;
|
|
error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp);
|
|
if (error)
|
|
goto out;
|
|
fs = (struct fs *)bp->b_data;
|
|
if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
|
|
fs->fs_bsize < sizeof(struct fs)) {
|
|
error = EINVAL; /* XXX needs translation */
|
|
goto out;
|
|
}
|
|
fs->fs_fmod = 0;
|
|
if (!fs->fs_clean) {
|
|
if (ronly || (mp->mnt_flag & MNT_FORCE)) {
|
|
printf("WARNING: %s was not properly dismounted.\n",fs->fs_fsmnt);
|
|
} else {
|
|
printf("WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck.\n",fs->fs_fsmnt);
|
|
error = EPERM;
|
|
goto out;
|
|
}
|
|
}
|
|
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
|
|
bzero((caddr_t)ump, sizeof *ump);
|
|
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
|
|
M_WAITOK);
|
|
bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBSIZE)
|
|
bp->b_flags |= B_INVAL;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
fs = ump->um_fs;
|
|
fs->fs_ronly = ronly;
|
|
if (ronly == 0) {
|
|
fs->fs_fmod = 1;
|
|
fs->fs_clean = 0;
|
|
}
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
base = space = malloc((u_long)fs->fs_cssize, M_UFSMNT,
|
|
M_WAITOK);
|
|
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,
|
|
NOCRED, &bp);
|
|
if (error) {
|
|
free(base, M_UFSMNT);
|
|
goto out;
|
|
}
|
|
bcopy(bp->b_data, space, (u_int)size);
|
|
fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
|
|
space += size;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
mp->mnt_data = (qaddr_t)ump;
|
|
mp->mnt_stat.f_fsid.val[0] = (long)dev;
|
|
mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS;
|
|
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
|
|
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;
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
ump->um_quotas[i] = NULLVP;
|
|
devvp->v_specflags |= SI_MOUNTEDON;
|
|
ffs_oldfscompat(fs);
|
|
|
|
/*
|
|
* Set FS local "last mounted on" information (NULL pad)
|
|
*/
|
|
copystr( mp->mnt_stat.f_mntonname, /* mount point*/
|
|
fs->fs_fsmnt, /* copy area*/
|
|
sizeof(fs->fs_fsmnt) - 1, /* max size*/
|
|
&strsize); /* real size*/
|
|
bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize);
|
|
|
|
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;
|
|
}
|
|
if (ronly == 0)
|
|
ffs_sbupdate(ump, MNT_WAIT);
|
|
/*
|
|
* Only VMIO the backing device if the backing device is a real
|
|
* block device. This excludes the original MFS implementation.
|
|
* Note that it is optional that the backing device be VMIOed. This
|
|
* increases the opportunity for metadata caching.
|
|
*/
|
|
if ((devvp->v_type == VBLK) && (major(devvp->v_rdev) < nblkdev)) {
|
|
vfs_object_create(devvp, p, p->p_ucred, 0);
|
|
}
|
|
return (0);
|
|
out:
|
|
if (bp)
|
|
brelse(bp);
|
|
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
|
|
if (ump) {
|
|
free(ump->um_fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sanity checks for old file systems.
|
|
*
|
|
* XXX - goes away some day.
|
|
*/
|
|
static int
|
|
ffs_oldfscompat(fs)
|
|
struct fs *fs;
|
|
{
|
|
|
|
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 */
|
|
#if 0
|
|
int i; /* XXX */
|
|
quad_t sizepb = fs->fs_bsize; /* 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 */
|
|
#endif
|
|
fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
|
|
fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
|
|
fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
|
|
} /* XXX */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
int
|
|
ffs_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
register struct fs *fs;
|
|
int error, flags, ronly;
|
|
|
|
flags = 0;
|
|
if (mntflags & MNT_FORCE) {
|
|
flags |= FORCECLOSE;
|
|
}
|
|
error = ffs_flushfiles(mp, flags, p);
|
|
if (error)
|
|
return (error);
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
ronly = fs->fs_ronly;
|
|
if (!ronly) {
|
|
fs->fs_clean = 1;
|
|
ffs_sbupdate(ump, MNT_WAIT);
|
|
}
|
|
ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
|
|
VOP_LOCK(ump->um_devvp);
|
|
vnode_pager_uncache(ump->um_devvp);
|
|
VOP_UNLOCK(ump->um_devvp);
|
|
|
|
error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE,
|
|
NOCRED, p);
|
|
|
|
vrele(ump->um_devvp);
|
|
|
|
free(fs->fs_csp[0], M_UFSMNT);
|
|
free(fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Flush out all the files in a filesystem.
|
|
*/
|
|
int
|
|
ffs_flushfiles(mp, flags, p)
|
|
register struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
int error;
|
|
|
|
if (!doforce)
|
|
flags &= ~FORCECLOSE;
|
|
ump = VFSTOUFS(mp);
|
|
#ifdef QUOTA
|
|
if (mp->mnt_flag & MNT_QUOTA) {
|
|
int i;
|
|
error = vflush(mp, NULLVP, SKIPSYSTEM|flags);
|
|
if (error)
|
|
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.
|
|
*/
|
|
}
|
|
#endif
|
|
error = vflush(mp, NULLVP, flags);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file system statistics.
|
|
*/
|
|
int
|
|
ffs_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
register struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
register struct fs *fs;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
if (fs->fs_magic != FS_MAGIC)
|
|
panic("ffs_statfs");
|
|
sbp->f_type = MOUNT_UFS;
|
|
sbp->f_bsize = fs->fs_fsize;
|
|
sbp->f_iosize = fs->fs_bsize;
|
|
sbp->f_blocks = fs->fs_dsize;
|
|
sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
|
|
fs->fs_cstotal.cs_nffree;
|
|
sbp->f_bavail = freespace(fs, fs->fs_minfree);
|
|
sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
|
|
sbp->f_ffree = fs->fs_cstotal.cs_nifree;
|
|
if (sbp != &mp->mnt_stat) {
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntonname,
|
|
(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
|
|
bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
|
|
(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Go through the disk queues to initiate sandbagged IO;
|
|
* go through the inodes to write those that have been modified;
|
|
* initiate the writing of the super block if it has been modified.
|
|
*
|
|
* Note: we are always called with the filesystem marked `MPBUSY'.
|
|
*/
|
|
int
|
|
ffs_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
register struct vnode *vp, *nvp;
|
|
register struct inode *ip;
|
|
register struct ufsmount *ump = VFSTOUFS(mp);
|
|
register struct fs *fs;
|
|
struct timeval tv;
|
|
int error, allerror = 0;
|
|
|
|
fs = ump->um_fs;
|
|
/*
|
|
* Write back modified superblock.
|
|
* Consistency check that the superblock
|
|
* is still in the buffer cache.
|
|
*/
|
|
if (fs->fs_fmod != 0) {
|
|
if (fs->fs_ronly != 0) { /* XXX */
|
|
printf("fs = %s\n", fs->fs_fsmnt);
|
|
panic("update: rofs mod");
|
|
}
|
|
fs->fs_fmod = 0;
|
|
fs->fs_time = time.tv_sec;
|
|
allerror = ffs_sbupdate(ump, waitfor);
|
|
}
|
|
/*
|
|
* Write back each (modified) inode.
|
|
*/
|
|
loop:
|
|
for (vp = mp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
|
|
/*
|
|
* If the vnode that we are about to sync is no longer
|
|
* associated with this mount point, start over.
|
|
*/
|
|
if (vp->v_mount != mp)
|
|
goto loop;
|
|
nvp = vp->v_mntvnodes.le_next;
|
|
if (VOP_ISLOCKED(vp))
|
|
continue;
|
|
ip = VTOI(vp);
|
|
if ((((ip->i_flag &
|
|
(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0)) &&
|
|
vp->v_dirtyblkhd.lh_first == NULL)
|
|
continue;
|
|
if (vp->v_type != VCHR) {
|
|
if (vget(vp, 1))
|
|
goto loop;
|
|
error = VOP_FSYNC(vp, cred, waitfor, p);
|
|
if (error)
|
|
allerror = error;
|
|
vput(vp);
|
|
} else {
|
|
tv = time;
|
|
/* VOP_UPDATE(vp, &tv, &tv, waitfor == MNT_WAIT); */
|
|
VOP_UPDATE(vp, &tv, &tv, 0);
|
|
}
|
|
}
|
|
/*
|
|
* Force stale file system control information to be flushed.
|
|
*/
|
|
error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p);
|
|
if (error)
|
|
allerror = error;
|
|
#ifdef QUOTA
|
|
qsync(mp);
|
|
#endif
|
|
return (allerror);
|
|
}
|
|
|
|
/*
|
|
* Look up a FFS dinode number to find its incore vnode, otherwise read it
|
|
* in from disk. If it is in core, wait for the lock bit to clear, then
|
|
* return the inode locked. Detection and handling of mount points must be
|
|
* done by the calling routine.
|
|
*/
|
|
static int ffs_inode_hash_lock;
|
|
|
|
int
|
|
ffs_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
register struct fs *fs;
|
|
register struct inode *ip;
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
dev_t dev;
|
|
int type, error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
restart:
|
|
if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* Lock out the creation of new entries in the FFS hash table in
|
|
* case getnewvnode() or MALLOC() blocks, otherwise a duplicate
|
|
* may occur!
|
|
*/
|
|
if (ffs_inode_hash_lock) {
|
|
while (ffs_inode_hash_lock) {
|
|
ffs_inode_hash_lock = -1;
|
|
tsleep(&ffs_inode_hash_lock, PVM, "ffsvgt", 0);
|
|
}
|
|
goto restart;
|
|
}
|
|
ffs_inode_hash_lock = 1;
|
|
|
|
/*
|
|
* If this MALLOC() is performed after the getnewvnode()
|
|
* it might block, leaving a vnode with a NULL v_data to be
|
|
* found by ffs_sync() if a sync happens to fire right then,
|
|
* which will cause a panic because ffs_sync() blindly
|
|
* dereferences vp->v_data (as well it should).
|
|
*/
|
|
type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */
|
|
MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK);
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp);
|
|
if (error) {
|
|
if (ffs_inode_hash_lock < 0)
|
|
wakeup(&ffs_inode_hash_lock);
|
|
ffs_inode_hash_lock = 0;
|
|
*vpp = NULL;
|
|
FREE(ip, type);
|
|
return (error);
|
|
}
|
|
bzero((caddr_t)ip, sizeof(struct inode));
|
|
vp->v_data = ip;
|
|
ip->i_vnode = vp;
|
|
ip->i_fs = fs = ump->um_fs;
|
|
ip->i_dev = dev;
|
|
ip->i_number = ino;
|
|
#ifdef QUOTA
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAXQUOTAS; i++)
|
|
ip->i_dquot[i] = NODQUOT;
|
|
}
|
|
#endif
|
|
/*
|
|
* Put it onto its hash chain and lock it so that other requests for
|
|
* this inode will block if they arrive while we are sleeping waiting
|
|
* for old data structures to be purged or for the contents of the
|
|
* disk portion of this inode to be read.
|
|
*/
|
|
ufs_ihashins(ip);
|
|
|
|
if (ffs_inode_hash_lock < 0)
|
|
wakeup(&ffs_inode_hash_lock);
|
|
ffs_inode_hash_lock = 0;
|
|
|
|
/* Read in the disk contents for the inode, copy into the inode. */
|
|
error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
/*
|
|
* The inode does not contain anything useful, so it would
|
|
* be misleading to leave it on its hash chain. With mode
|
|
* still zero, it will be unlinked and returned to the free
|
|
* list by vput().
|
|
*/
|
|
brelse(bp);
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
|
|
bqrelse(bp);
|
|
|
|
/*
|
|
* Initialize the vnode from the inode, check for aliases.
|
|
* Note that the underlying vnode may have changed.
|
|
*/
|
|
error = ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp);
|
|
if (error) {
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
/*
|
|
* Finish inode initialization now that aliasing has been resolved.
|
|
*/
|
|
ip->i_devvp = ump->um_devvp;
|
|
VREF(ip->i_devvp);
|
|
/*
|
|
* Set up a generation number for this inode if it does not
|
|
* already have one. This should only happen on old filesystems.
|
|
*/
|
|
if (ip->i_gen == 0) {
|
|
if (++nextgennumber < (u_long)time.tv_sec)
|
|
nextgennumber = time.tv_sec;
|
|
ip->i_gen = nextgennumber;
|
|
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
|
|
ip->i_flag |= IN_MODIFIED;
|
|
}
|
|
/*
|
|
* Ensure that uid and gid are correct. This is a temporary
|
|
* fix until fsck has been changed to do the update.
|
|
*/
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
ip->i_uid = ip->i_din.di_ouid; /* XXX */
|
|
ip->i_gid = ip->i_din.di_ogid; /* XXX */
|
|
} /* XXX */
|
|
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* File handle to vnode
|
|
*
|
|
* Have to be really careful about stale file handles:
|
|
* - check that the inode number is valid
|
|
* - call ffs_vget() to get the locked inode
|
|
* - check for an unallocated inode (i_mode == 0)
|
|
* - check that the given client host has export rights and return
|
|
* those rights via. exflagsp and credanonp
|
|
*/
|
|
int
|
|
ffs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
|
|
register struct mount *mp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
register struct ufid *ufhp;
|
|
struct fs *fs;
|
|
|
|
ufhp = (struct ufid *)fhp;
|
|
fs = VFSTOUFS(mp)->um_fs;
|
|
if (ufhp->ufid_ino < ROOTINO ||
|
|
ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg)
|
|
return (ESTALE);
|
|
return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp));
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
ffs_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
register struct inode *ip;
|
|
register struct ufid *ufhp;
|
|
|
|
ip = VTOI(vp);
|
|
ufhp = (struct ufid *)fhp;
|
|
ufhp->ufid_len = sizeof(struct ufid);
|
|
ufhp->ufid_ino = ip->i_number;
|
|
ufhp->ufid_gen = ip->i_gen;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Write a superblock and associated information back to disk.
|
|
*/
|
|
static int
|
|
ffs_sbupdate(mp, waitfor)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
{
|
|
register struct fs *fs = mp->um_fs;
|
|
register struct buf *bp;
|
|
int blks;
|
|
caddr_t space;
|
|
int i, size, error = 0;
|
|
|
|
bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0);
|
|
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
|
|
/* Restore compatibility to old file systems. XXX */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
|
|
((struct fs *)bp->b_data)->fs_nrpos = -1; /* XXX */
|
|
if (waitfor == MNT_WAIT)
|
|
error = bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
space = (caddr_t)fs->fs_csp[0];
|
|
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;
|
|
bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
|
|
size, 0, 0);
|
|
bcopy(space, bp->b_data, (u_int)size);
|
|
space += size;
|
|
if (waitfor == MNT_WAIT)
|
|
error = bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
}
|
|
return (error);
|
|
}
|