f576a00d1b
vnode creation globaly, we allow processes to create vnodes concurently. In case of concurent creation of vnode for the one ino, we allow processes to race and then check who wins. Assuming that concurent creation of vnode for same ino is really rare case, this is belived to be an improvement, as it just allows concurent creation of vnodes. Idea by: bp Reviewed by: dillon MFC after: 1 month
1391 lines
37 KiB
C
1391 lines
37 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 8.31 (Berkeley) 5/20/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_quota.h"
|
|
#include "opt_ufs.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/mount.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/disk.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
|
|
#include <ufs/ufs/extattr.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_page.h>
|
|
|
|
static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part");
|
|
|
|
static int ffs_sbupdate(struct ufsmount *, int);
|
|
int ffs_reload(struct mount *,struct ucred *,struct thread *);
|
|
static int ffs_oldfscompat(struct fs *);
|
|
static int ffs_init(struct vfsconf *);
|
|
|
|
static struct vfsops ufs_vfsops = {
|
|
ffs_mount,
|
|
ufs_start,
|
|
ffs_unmount,
|
|
ufs_root,
|
|
ufs_quotactl,
|
|
ffs_statfs,
|
|
ffs_sync,
|
|
ffs_vget,
|
|
ffs_fhtovp,
|
|
vfs_stdcheckexp,
|
|
ffs_vptofh,
|
|
ffs_init,
|
|
vfs_stduninit,
|
|
#ifdef UFS_EXTATTR
|
|
ufs_extattrctl,
|
|
#else
|
|
vfs_stdextattrctl,
|
|
#endif
|
|
};
|
|
|
|
VFS_SET(ufs_vfsops, ufs, 0);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
int
|
|
ffs_mount(mp, path, data, ndp, td)
|
|
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 thread *td; /* process requesting mount*/
|
|
{
|
|
size_t size;
|
|
struct vnode *devvp;
|
|
struct ufs_args args;
|
|
struct ufsmount *ump = 0;
|
|
struct fs *fs;
|
|
int error, flags;
|
|
mode_t accessmode;
|
|
|
|
/*
|
|
* Use NULL path to indicate we are mounting the root filesystem.
|
|
*/
|
|
if (path == NULL) {
|
|
if ((error = bdevvp(rootdev, &rootvp))) {
|
|
printf("ffs_mountroot: can't find rootvp\n");
|
|
return (error);
|
|
}
|
|
|
|
if ((error = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0)
|
|
return (error);
|
|
(void)VFS_STATFS(mp, &mp->mnt_stat, td);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Mounting non-root filesystem or updating a filesystem
|
|
*/
|
|
if ((error = copyin(data, (caddr_t)&args, sizeof(struct ufs_args)))!= 0)
|
|
return (error);
|
|
|
|
/*
|
|
* 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;
|
|
if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
|
|
if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
|
|
return (error);
|
|
/*
|
|
* Flush any dirty data.
|
|
*/
|
|
VFS_SYNC(mp, MNT_WAIT, td->td_proc->p_ucred, td);
|
|
/*
|
|
* Check for and optionally get rid of files open
|
|
* for writing.
|
|
*/
|
|
flags = WRITECLOSE;
|
|
if (mp->mnt_flag & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
if (mp->mnt_flag & MNT_SOFTDEP) {
|
|
error = softdep_flushfiles(mp, flags, td);
|
|
} else {
|
|
error = ffs_flushfiles(mp, flags, td);
|
|
}
|
|
if (error) {
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
if (fs->fs_pendingblocks != 0 ||
|
|
fs->fs_pendinginodes != 0) {
|
|
printf("%s: update error: blocks %d files %d\n",
|
|
fs->fs_fsmnt, fs->fs_pendingblocks,
|
|
fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
fs->fs_ronly = 1;
|
|
if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0)
|
|
fs->fs_clean = 1;
|
|
if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) {
|
|
fs->fs_ronly = 0;
|
|
fs->fs_clean = 0;
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
vn_finished_write(mp);
|
|
}
|
|
if ((mp->mnt_flag & MNT_RELOAD) &&
|
|
(error = ffs_reload(mp, ndp->ni_cnd.cn_cred, td)) != 0)
|
|
return (error);
|
|
if (fs->fs_ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
|
|
/*
|
|
* If upgrade to read-write by non-root, then verify
|
|
* that user has necessary permissions on the device.
|
|
*/
|
|
if (suser(td)) {
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if ((error = VOP_ACCESS(devvp, VREAD | VWRITE,
|
|
td->td_ucred, td)) != 0) {
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
}
|
|
fs->fs_flags &= ~FS_UNCLEAN;
|
|
if (fs->fs_clean == 0) {
|
|
fs->fs_flags |= FS_UNCLEAN;
|
|
if ((mp->mnt_flag & MNT_FORCE) ||
|
|
((fs->fs_flags & FS_NEEDSFSCK) == 0 &&
|
|
(fs->fs_flags & FS_DOSOFTDEP))) {
|
|
printf("WARNING: %s was not %s\n",
|
|
fs->fs_fsmnt, "properly dismounted");
|
|
} else {
|
|
printf(
|
|
"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
|
|
fs->fs_fsmnt);
|
|
return (EPERM);
|
|
}
|
|
}
|
|
if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
|
|
return (error);
|
|
fs->fs_ronly = 0;
|
|
fs->fs_clean = 0;
|
|
if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) {
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
/* check to see if we need to start softdep */
|
|
if ((fs->fs_flags & FS_DOSOFTDEP) &&
|
|
(error = softdep_mount(devvp, mp, fs, td->td_ucred))){
|
|
vn_finished_write(mp);
|
|
return (error);
|
|
}
|
|
if (fs->fs_snapinum[0] != 0)
|
|
ffs_snapshot_mount(mp);
|
|
vn_finished_write(mp);
|
|
}
|
|
/*
|
|
* Soft updates is incompatible with "async",
|
|
* so if we are doing softupdates stop the user
|
|
* from setting the async flag in an update.
|
|
* Softdep_mount() clears it in an initial mount
|
|
* or ro->rw remount.
|
|
*/
|
|
if (mp->mnt_flag & MNT_SOFTDEP)
|
|
mp->mnt_flag &= ~MNT_ASYNC;
|
|
/*
|
|
* If not updating name, process export requests.
|
|
*/
|
|
if (args.fspec == 0)
|
|
return (vfs_export(mp, &args.export));
|
|
/*
|
|
* If this is a snapshot request, take the snapshot.
|
|
*/
|
|
if (mp->mnt_flag & MNT_SNAPSHOT)
|
|
return (ffs_snapshot(mp, args.fspec));
|
|
}
|
|
|
|
/*
|
|
* 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, td);
|
|
if ((error = namei(ndp)) != 0)
|
|
return (error);
|
|
NDFREE(ndp, NDF_ONLY_PNBUF);
|
|
devvp = ndp->ni_vp;
|
|
if (!vn_isdisk(devvp, &error)) {
|
|
vrele(devvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* If mount by non-root, then verify that user has necessary
|
|
* permissions on the device.
|
|
*/
|
|
if (suser(td)) {
|
|
accessmode = VREAD;
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
accessmode |= VWRITE;
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){
|
|
vput(devvp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
}
|
|
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
/*
|
|
* Update only
|
|
*
|
|
* If it's not the same vnode, or at least the same device
|
|
* then it's not correct.
|
|
*/
|
|
|
|
if (devvp != ump->um_devvp &&
|
|
devvp->v_rdev != ump->um_devvp->v_rdev)
|
|
error = EINVAL; /* needs translation */
|
|
vrele(devvp);
|
|
if (error)
|
|
return (error);
|
|
} else {
|
|
/*
|
|
* New mount
|
|
*
|
|
* We need the name for the mount point (also used for
|
|
* "last mounted on") copied in. If an error occurs,
|
|
* the mount point is discarded by the upper level code.
|
|
* Note that vfs_mount() populates f_mntonname for us.
|
|
*/
|
|
if ((error = ffs_mountfs(devvp, mp, td, M_FFSNODE)) != 0) {
|
|
vrele(devvp);
|
|
return (error);
|
|
}
|
|
}
|
|
/*
|
|
* Save "mounted from" device name 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);
|
|
/*
|
|
* Initialize filesystem stat information in mount struct.
|
|
*/
|
|
(void)VFS_STATFS(mp, &mp->mnt_stat, td);
|
|
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(mp, cred, td)
|
|
struct mount *mp;
|
|
struct ucred *cred;
|
|
struct thread *td;
|
|
{
|
|
struct vnode *vp, *nvp, *devvp;
|
|
struct inode *ip;
|
|
void *space;
|
|
struct buf *bp;
|
|
struct fs *fs, *newfs;
|
|
dev_t dev;
|
|
int i, blks, size, error;
|
|
int32_t *lp;
|
|
u_int sectorsize;
|
|
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
return (EINVAL);
|
|
/*
|
|
* Step 1: invalidate all cached meta-data.
|
|
*/
|
|
devvp = VFSTOUFS(mp)->um_devvp;
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = vinvalbuf(devvp, 0, cred, td, 0, 0);
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (error)
|
|
panic("ffs_reload: dirty1");
|
|
|
|
dev = devvp->v_rdev;
|
|
|
|
/*
|
|
* Only VMIO the backing device if the backing device is a real
|
|
* block device.
|
|
*/
|
|
if (vn_isdisk(devvp, NULL)) {
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
vfs_object_create(devvp, td, td->td_ucred);
|
|
mtx_lock(&devvp->v_interlock);
|
|
VOP_UNLOCK(devvp, LK_INTERLOCK, td);
|
|
}
|
|
|
|
/*
|
|
* Step 2: re-read superblock from disk.
|
|
*/
|
|
if (VOP_IOCTL(devvp, DIOCGSECTORSIZE, (caddr_t)§orsize,
|
|
FREAD, NOCRED, td) != 0)
|
|
size = DEV_BSIZE;
|
|
else
|
|
size = sectorsize;
|
|
if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, NOCRED,&bp)) != 0)
|
|
return (error);
|
|
newfs = (struct fs *)bp->b_data;
|
|
if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE ||
|
|
newfs->fs_bsize < sizeof(struct fs)) {
|
|
brelse(bp);
|
|
return (EIO); /* XXX needs translation */
|
|
}
|
|
fs = VFSTOUFS(mp)->um_fs;
|
|
/*
|
|
* 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_contigdirs = fs->fs_contigdirs;
|
|
newfs->fs_active = fs->fs_active;
|
|
bcopy(newfs, fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBSIZE)
|
|
bp->b_flags |= B_INVAL | B_NOCACHE;
|
|
brelse(bp);
|
|
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
|
|
ffs_oldfscompat(fs);
|
|
/* An old fsck may have zeroed these fields, so recheck them. */
|
|
if (fs->fs_avgfilesize <= 0) /* XXX */
|
|
fs->fs_avgfilesize = AVFILESIZ; /* XXX */
|
|
if (fs->fs_avgfpdir <= 0) /* XXX */
|
|
fs->fs_avgfpdir = AFPDIR; /* XXX */
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: reload pending error: blocks %d files %d\n",
|
|
fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
|
|
/*
|
|
* Step 3: re-read summary information from disk.
|
|
*/
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
space = 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,
|
|
NOCRED, &bp);
|
|
if (error)
|
|
return (error);
|
|
bcopy(bp->b_data, space, (u_int)size);
|
|
space = (char *)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;
|
|
}
|
|
|
|
loop:
|
|
mtx_lock(&mntvnode_mtx);
|
|
for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) {
|
|
if (vp->v_mount != mp) {
|
|
mtx_unlock(&mntvnode_mtx);
|
|
goto loop;
|
|
}
|
|
nvp = TAILQ_NEXT(vp, v_nmntvnodes);
|
|
mtx_unlock(&mntvnode_mtx);
|
|
/*
|
|
* Step 4: invalidate all inactive vnodes.
|
|
*/
|
|
if (vrecycle(vp, NULL, td))
|
|
goto loop;
|
|
/*
|
|
* Step 5: invalidate all cached file data.
|
|
*/
|
|
mtx_lock(&vp->v_interlock);
|
|
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
|
|
goto loop;
|
|
}
|
|
if (vinvalbuf(vp, 0, cred, td, 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));
|
|
ip->i_effnlink = ip->i_nlink;
|
|
brelse(bp);
|
|
vput(vp);
|
|
mtx_lock(&mntvnode_mtx);
|
|
}
|
|
mtx_unlock(&mntvnode_mtx);
|
|
return (0);
|
|
}
|
|
|
|
#include <sys/sysctl.h>
|
|
int bigcgs = 0;
|
|
SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, "");
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
int
|
|
ffs_mountfs(devvp, mp, td, malloctype)
|
|
struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct thread *td;
|
|
struct malloc_type *malloctype;
|
|
{
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct fs *fs;
|
|
dev_t dev;
|
|
void *space;
|
|
int error, i, blks, size, ronly;
|
|
int32_t *lp;
|
|
struct ucred *cred;
|
|
u_int64_t maxfilesize; /* XXX */
|
|
size_t strsize;
|
|
int ncount;
|
|
u_int sectorsize;
|
|
|
|
dev = devvp->v_rdev;
|
|
cred = td ? td->td_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.
|
|
*/
|
|
error = vfs_mountedon(devvp);
|
|
if (error)
|
|
return (error);
|
|
ncount = vcount(devvp);
|
|
|
|
if (ncount > 1 && devvp != rootvp)
|
|
return (EBUSY);
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0);
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Only VMIO the backing device if the backing device is a real
|
|
* block device.
|
|
* Note that it is optional that the backing device be VMIOed. This
|
|
* increases the opportunity for metadata caching.
|
|
*/
|
|
if (vn_isdisk(devvp, NULL)) {
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
vfs_object_create(devvp, td, cred);
|
|
mtx_lock(&devvp->v_interlock);
|
|
VOP_UNLOCK(devvp, LK_INTERLOCK, td);
|
|
}
|
|
|
|
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
/*
|
|
* XXX: We don't re-VOP_OPEN in FREAD|FWRITE mode if the filesystem
|
|
* XXX: is subsequently remounted, so open it FREAD|FWRITE from the
|
|
* XXX: start to avoid getting trashed later on.
|
|
*/
|
|
#ifdef notyet
|
|
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td);
|
|
#else
|
|
error = VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, td);
|
|
#endif
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (error)
|
|
return (error);
|
|
if (devvp->v_rdev->si_iosize_max != 0)
|
|
mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
|
|
if (mp->mnt_iosize_max > MAXPHYS)
|
|
mp->mnt_iosize_max = MAXPHYS;
|
|
|
|
if (VOP_IOCTL(devvp, DIOCGSECTORSIZE, (caddr_t)§orsize,
|
|
FREAD, cred, td) != 0)
|
|
size = DEV_BSIZE;
|
|
else
|
|
size = sectorsize;
|
|
|
|
bp = NULL;
|
|
ump = NULL;
|
|
if ((error = bread(devvp, SBLOCK, SBSIZE, cred, &bp)) != 0)
|
|
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;
|
|
fs->fs_flags &= ~FS_UNCLEAN;
|
|
if (fs->fs_clean == 0) {
|
|
fs->fs_flags |= FS_UNCLEAN;
|
|
if (ronly || (mp->mnt_flag & MNT_FORCE) ||
|
|
((fs->fs_flags & FS_NEEDSFSCK) == 0 &&
|
|
(fs->fs_flags & FS_DOSOFTDEP))) {
|
|
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;
|
|
}
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: lost blocks %d files %d\n", fs->fs_fsmnt,
|
|
fs->fs_pendingblocks, fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
}
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: mount pending error: blocks %d files %d\n",
|
|
fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
/* XXX updating 4.2 FFS superblocks trashes rotational layout tables */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
|
|
error = EROFS; /* needs translation */
|
|
goto out;
|
|
}
|
|
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO);
|
|
ump->um_malloctype = malloctype;
|
|
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
|
|
M_WAITOK);
|
|
ump->um_blkatoff = ffs_blkatoff;
|
|
ump->um_truncate = ffs_truncate;
|
|
ump->um_update = ffs_update;
|
|
ump->um_valloc = ffs_valloc;
|
|
ump->um_vfree = ffs_vfree;
|
|
ump->um_balloc = ffs_balloc;
|
|
bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize);
|
|
if (fs->fs_sbsize < SBSIZE)
|
|
bp->b_flags |= B_INVAL | B_NOCACHE;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
fs = ump->um_fs;
|
|
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);
|
|
size += fs->fs_ncg * sizeof(u_int8_t);
|
|
space = malloc((u_long)size, M_UFSMNT, M_WAITOK);
|
|
fs->fs_csp = 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;
|
|
if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
|
|
cred, &bp)) != 0) {
|
|
free(fs->fs_csp, M_UFSMNT);
|
|
goto out;
|
|
}
|
|
bcopy(bp->b_data, space, (u_int)size);
|
|
space = (char *)space + size;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
if (fs->fs_contigsumsize > 0) {
|
|
fs->fs_maxcluster = lp = space;
|
|
for (i = 0; i < fs->fs_ncg; i++)
|
|
*lp++ = fs->fs_contigsumsize;
|
|
space = lp;
|
|
}
|
|
size = fs->fs_ncg * sizeof(u_int8_t);
|
|
fs->fs_contigdirs = (u_int8_t *)space;
|
|
bzero(fs->fs_contigdirs, size);
|
|
fs->fs_active = NULL;
|
|
/* Compatibility for old filesystems XXX */
|
|
if (fs->fs_avgfilesize <= 0) /* XXX */
|
|
fs->fs_avgfilesize = AVFILESIZ; /* XXX */
|
|
if (fs->fs_avgfpdir <= 0) /* XXX */
|
|
fs->fs_avgfpdir = AFPDIR; /* XXX */
|
|
mp->mnt_data = (qaddr_t)ump;
|
|
mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0];
|
|
mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
|
|
if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 ||
|
|
vfs_getvfs(&mp->mnt_stat.f_fsid))
|
|
vfs_getnewfsid(mp);
|
|
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;
|
|
#ifdef UFS_EXTATTR
|
|
ufs_extattr_uepm_init(&ump->um_extattr);
|
|
#endif
|
|
devvp->v_rdev->si_mountpoint = mp;
|
|
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;
|
|
}
|
|
|
|
ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */
|
|
maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */
|
|
if (fs->fs_maxfilesize > maxfilesize) /* XXX */
|
|
fs->fs_maxfilesize = maxfilesize; /* XXX */
|
|
if (bigcgs) {
|
|
if (fs->fs_sparecon[0] <= 0)
|
|
fs->fs_sparecon[0] = fs->fs_cgsize;
|
|
fs->fs_cgsize = fs->fs_bsize;
|
|
}
|
|
if (ronly == 0) {
|
|
if ((fs->fs_flags & FS_DOSOFTDEP) &&
|
|
(error = softdep_mount(devvp, mp, fs, cred)) != 0) {
|
|
free(fs->fs_csp, M_UFSMNT);
|
|
goto out;
|
|
}
|
|
if (fs->fs_snapinum[0] != 0)
|
|
ffs_snapshot_mount(mp);
|
|
fs->fs_fmod = 1;
|
|
fs->fs_clean = 0;
|
|
(void) ffs_sbupdate(ump, MNT_WAIT);
|
|
}
|
|
#ifdef UFS_EXTATTR
|
|
#ifdef UFS_EXTATTR_AUTOSTART
|
|
/*
|
|
*
|
|
* Auto-starting does the following:
|
|
* - check for /.attribute in the fs, and extattr_start if so
|
|
* - for each file in .attribute, enable that file with
|
|
* an attribute of the same name.
|
|
* Not clear how to report errors -- probably eat them.
|
|
* This would all happen while the filesystem was busy/not
|
|
* available, so would effectively be "atomic".
|
|
*/
|
|
(void) ufs_extattr_autostart(mp, td);
|
|
#endif /* !UFS_EXTATTR_AUTOSTART */
|
|
#endif /* !UFS_EXTATTR */
|
|
return (0);
|
|
out:
|
|
devvp->v_rdev->si_mountpoint = NULL;
|
|
if (bp)
|
|
brelse(bp);
|
|
/* XXX: see comment above VOP_OPEN */
|
|
#ifdef notyet
|
|
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, td);
|
|
#else
|
|
(void)VOP_CLOSE(devvp, FREAD|FWRITE, cred, td);
|
|
#endif
|
|
if (ump) {
|
|
free(ump->um_fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sanity checks for old filesystems.
|
|
*
|
|
* 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 */
|
|
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 */
|
|
#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, td)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct thread *td;
|
|
{
|
|
struct ufsmount *ump = VFSTOUFS(mp);
|
|
struct fs *fs;
|
|
int error, flags;
|
|
|
|
flags = 0;
|
|
if (mntflags & MNT_FORCE) {
|
|
flags |= FORCECLOSE;
|
|
}
|
|
#ifdef UFS_EXTATTR
|
|
if ((error = ufs_extattr_stop(mp, td))) {
|
|
if (error != EOPNOTSUPP)
|
|
printf("ffs_unmount: ufs_extattr_stop returned %d\n",
|
|
error);
|
|
} else {
|
|
ufs_extattr_uepm_destroy(&ump->um_extattr);
|
|
}
|
|
#endif
|
|
if (mp->mnt_flag & MNT_SOFTDEP) {
|
|
if ((error = softdep_flushfiles(mp, flags, td)) != 0)
|
|
return (error);
|
|
} else {
|
|
if ((error = ffs_flushfiles(mp, flags, td)) != 0)
|
|
return (error);
|
|
}
|
|
fs = ump->um_fs;
|
|
if (bigcgs) {
|
|
fs->fs_cgsize = fs->fs_sparecon[0];
|
|
fs->fs_sparecon[0] = 0;
|
|
}
|
|
if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
|
|
printf("%s: unmount pending error: blocks %d files %d\n",
|
|
fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes);
|
|
fs->fs_pendingblocks = 0;
|
|
fs->fs_pendinginodes = 0;
|
|
}
|
|
if (fs->fs_ronly == 0) {
|
|
fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1;
|
|
error = ffs_sbupdate(ump, MNT_WAIT);
|
|
if (error) {
|
|
fs->fs_clean = 0;
|
|
return (error);
|
|
}
|
|
}
|
|
ump->um_devvp->v_rdev->si_mountpoint = NULL;
|
|
|
|
vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0);
|
|
/* XXX: see comment above VOP_OPEN */
|
|
#ifdef notyet
|
|
error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE,
|
|
NOCRED, td);
|
|
#else
|
|
error = VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED, td);
|
|
#endif
|
|
|
|
vrele(ump->um_devvp);
|
|
|
|
free(fs->fs_csp, 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, td)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct thread *td;
|
|
{
|
|
struct ufsmount *ump;
|
|
int error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
#ifdef QUOTA
|
|
if (mp->mnt_flag & MNT_QUOTA) {
|
|
int i;
|
|
error = vflush(mp, 0, SKIPSYSTEM|flags);
|
|
if (error)
|
|
return (error);
|
|
for (i = 0; i < MAXQUOTAS; i++) {
|
|
if (ump->um_quotas[i] == NULLVP)
|
|
continue;
|
|
quotaoff(td, mp, i);
|
|
}
|
|
/*
|
|
* Here we fall through to vflush again to ensure
|
|
* that we have gotten rid of all the system vnodes.
|
|
*/
|
|
}
|
|
#endif
|
|
if (ump->um_devvp->v_flag & VCOPYONWRITE) {
|
|
if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0)
|
|
return (error);
|
|
ffs_snapshot_unmount(mp);
|
|
/*
|
|
* 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, 0, flags)) != 0)
|
|
return (error);
|
|
/*
|
|
* Flush filesystem metadata.
|
|
*/
|
|
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td);
|
|
VOP_UNLOCK(ump->um_devvp, 0, td);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
int
|
|
ffs_statfs(mp, sbp, td)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
struct thread *td;
|
|
{
|
|
struct ufsmount *ump;
|
|
struct fs *fs;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
if (fs->fs_magic != FS_MAGIC)
|
|
panic("ffs_statfs");
|
|
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 + dbtofsb(fs, fs->fs_pendingblocks);
|
|
sbp->f_bavail = freespace(fs, fs->fs_minfree) +
|
|
dbtofsb(fs, fs->fs_pendingblocks);
|
|
sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
|
|
sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes;
|
|
if (sbp != &mp->mnt_stat) {
|
|
sbp->f_type = mp->mnt_vfc->vfc_typenum;
|
|
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, td)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct thread *td;
|
|
{
|
|
struct vnode *nvp, *vp, *devvp;
|
|
struct inode *ip;
|
|
struct ufsmount *ump = VFSTOUFS(mp);
|
|
struct fs *fs;
|
|
int error, count, wait, lockreq, allerror = 0;
|
|
|
|
fs = ump->um_fs;
|
|
if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
|
|
printf("fs = %s\n", fs->fs_fsmnt);
|
|
panic("ffs_sync: rofs mod");
|
|
}
|
|
/*
|
|
* Write back each (modified) inode.
|
|
*/
|
|
wait = 0;
|
|
lockreq = LK_EXCLUSIVE | LK_NOWAIT;
|
|
if (waitfor == MNT_WAIT) {
|
|
wait = 1;
|
|
lockreq = LK_EXCLUSIVE;
|
|
}
|
|
mtx_lock(&mntvnode_mtx);
|
|
loop:
|
|
for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 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;
|
|
|
|
/*
|
|
* Depend on the mntvnode_slock to keep things stable enough
|
|
* for a quick test. Since there might be hundreds of
|
|
* thousands of vnodes, we cannot afford even a subroutine
|
|
* call unless there's a good chance that we have work to do.
|
|
*/
|
|
nvp = TAILQ_NEXT(vp, v_nmntvnodes);
|
|
ip = VTOI(vp);
|
|
if (vp->v_type == VNON || ((ip->i_flag &
|
|
(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
|
|
TAILQ_EMPTY(&vp->v_dirtyblkhd))) {
|
|
continue;
|
|
}
|
|
if (vp->v_type != VCHR) {
|
|
mtx_unlock(&mntvnode_mtx);
|
|
if ((error = vget(vp, lockreq, td)) != 0) {
|
|
mtx_lock(&mntvnode_mtx);
|
|
if (error == ENOENT)
|
|
goto loop;
|
|
} else {
|
|
if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0)
|
|
allerror = error;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vrele(vp);
|
|
mtx_lock(&mntvnode_mtx);
|
|
}
|
|
} else {
|
|
mtx_unlock(&mntvnode_mtx);
|
|
UFS_UPDATE(vp, wait);
|
|
mtx_lock(&mntvnode_mtx);
|
|
}
|
|
if (TAILQ_NEXT(vp, v_nmntvnodes) != nvp)
|
|
goto loop;
|
|
}
|
|
mtx_unlock(&mntvnode_mtx);
|
|
/*
|
|
* Force stale filesystem control information to be flushed.
|
|
*/
|
|
if (waitfor == MNT_WAIT) {
|
|
if ((error = softdep_flushworklist(ump->um_mountp, &count, td)))
|
|
allerror = error;
|
|
/* Flushed work items may create new vnodes to clean */
|
|
if (count) {
|
|
mtx_lock(&mntvnode_mtx);
|
|
goto loop;
|
|
}
|
|
}
|
|
#ifdef QUOTA
|
|
qsync(mp);
|
|
#endif
|
|
devvp = ump->um_devvp;
|
|
mtx_lock(&devvp->v_interlock);
|
|
if (waitfor != MNT_LAZY &&
|
|
(devvp->v_numoutput > 0 || TAILQ_FIRST(&devvp->v_dirtyblkhd))) {
|
|
mtx_unlock(&devvp->v_interlock);
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0)
|
|
allerror = error;
|
|
VOP_UNLOCK(devvp, 0, td);
|
|
if (waitfor == MNT_WAIT) {
|
|
mtx_lock(&mntvnode_mtx);
|
|
goto loop;
|
|
}
|
|
} else
|
|
mtx_unlock(&devvp->v_interlock);
|
|
/*
|
|
* Write back modified superblock.
|
|
*/
|
|
if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|
|
|
|
int
|
|
ffs_vget(mp, ino, flags, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
int flags;
|
|
struct vnode **vpp;
|
|
{
|
|
struct thread *td = curthread; /* XXX */
|
|
struct fs *fs;
|
|
struct inode *ip;
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
dev_t dev;
|
|
int error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
|
|
/*
|
|
* We do not lock vnode creation as it is beleived to be too
|
|
* expensive for such rare case as simultaneous creation of vnode
|
|
* for same ino by different processes. We just allow them to race
|
|
* and check later to decide who wins. Let the race begin!
|
|
*/
|
|
if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0)
|
|
return (error);
|
|
if (*vpp != NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* 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).
|
|
*/
|
|
MALLOC(ip, struct inode *, sizeof(struct inode),
|
|
ump->um_malloctype, M_WAITOK);
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp);
|
|
if (error) {
|
|
*vpp = NULL;
|
|
FREE(ip, ump->um_malloctype);
|
|
return (error);
|
|
}
|
|
bzero((caddr_t)ip, sizeof(struct inode));
|
|
/*
|
|
* FFS supports lock sharing in the stack of vnodes
|
|
*/
|
|
vp->v_vnlock = &vp->v_lock;
|
|
lockinit(vp->v_vnlock, PINOD, "inode", VLKTIMEOUT, LK_CANRECURSE);
|
|
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
|
|
/*
|
|
* Exclusively lock the vnode before adding to hash. Note, that we
|
|
* must not release nor downgrade the lock (despite flags argument
|
|
* says) till it is fully initialized.
|
|
*/
|
|
lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td);
|
|
|
|
/*
|
|
* Atomicaly (in terms of ufs_hash operations) check the hash for
|
|
* duplicate of vnode being created and add it to the hash. If a
|
|
* duplicate vnode was found, it will be vget()ed from hash for us.
|
|
*/
|
|
if ((error = ufs_ihashins(ip, flags, vpp)) != 0) {
|
|
vput(vp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
|
|
/* We lost the race, then throw away our vnode and return existing */
|
|
if (*vpp != NULL) {
|
|
vput(vp);
|
|
return (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));
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_load_inodeblock(ip);
|
|
else
|
|
ip->i_effnlink = ip->i_nlink;
|
|
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) {
|
|
ip->i_gen = random() / 2 + 1;
|
|
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, vpp)
|
|
struct mount *mp;
|
|
struct fid *fhp;
|
|
struct vnode **vpp;
|
|
{
|
|
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_fhtovp(mp, ufhp, vpp));
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
ffs_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
struct inode *ip;
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Initialize the filesystem; just use ufs_init.
|
|
*/
|
|
static int
|
|
ffs_init(vfsp)
|
|
struct vfsconf *vfsp;
|
|
{
|
|
|
|
softdep_initialize();
|
|
return (ufs_init(vfsp));
|
|
}
|
|
|
|
/*
|
|
* Write a superblock and associated information back to disk.
|
|
*/
|
|
static int
|
|
ffs_sbupdate(mp, waitfor)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
{
|
|
struct fs *dfs, *fs = mp->um_fs;
|
|
struct buf *bp;
|
|
int blks;
|
|
void *space;
|
|
int i, size, error, allerror = 0;
|
|
|
|
/*
|
|
* First write back the summary information.
|
|
*/
|
|
blks = howmany(fs->fs_cssize, fs->fs_fsize);
|
|
space = 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;
|
|
bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
|
|
size, 0, 0);
|
|
bcopy(space, bp->b_data, (u_int)size);
|
|
space = (char *)space + size;
|
|
if (waitfor != MNT_WAIT)
|
|
bawrite(bp);
|
|
else if ((error = bwrite(bp)) != 0)
|
|
allerror = error;
|
|
}
|
|
/*
|
|
* Now write back the superblock itself. If any errors occurred
|
|
* up to this point, then fail so that the superblock avoids
|
|
* being written out as clean.
|
|
*/
|
|
if (allerror)
|
|
return (allerror);
|
|
bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0);
|
|
fs->fs_fmod = 0;
|
|
fs->fs_time = time_second;
|
|
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
|
|
/* Restore compatibility to old filesystems. XXX */
|
|
dfs = (struct fs *)bp->b_data; /* XXX */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
|
|
dfs->fs_nrpos = -1; /* XXX */
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
int32_t *lp, tmp; /* XXX */
|
|
/* XXX */
|
|
lp = (int32_t *)&dfs->fs_qbmask; /* XXX */
|
|
tmp = lp[4]; /* XXX */
|
|
for (i = 4; i > 0; i--) /* XXX */
|
|
lp[i] = lp[i-1]; /* XXX */
|
|
lp[0] = tmp; /* XXX */
|
|
} /* XXX */
|
|
dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */
|
|
if (waitfor != MNT_WAIT)
|
|
bawrite(bp);
|
|
else if ((error = bwrite(bp)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|