894 lines
23 KiB
C
894 lines
23 KiB
C
/* $NetBSD: ffs_vfsops.c,v 1.8 1994/10/28 20:20:18 mycroft Exp $ */
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/*
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* Copyright (c) 1989, 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/vnode.h>
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#include <sys/socket.h>
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#include <sys/mount.h>
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#include <sys/buf.h>
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#include <sys/mbuf.h>
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#include <sys/file.h>
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#include <sys/disklabel.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <miscfs/specfs/specdev.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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int ffs_sbupdate __P((struct ufsmount *, int));
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struct vfsops ufs_vfsops = {
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MOUNT_UFS,
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ffs_mount,
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ufs_start,
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ffs_unmount,
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ufs_root,
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ufs_quotactl,
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ffs_statfs,
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ffs_sync,
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ffs_vget,
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ffs_fhtovp,
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ffs_vptofh,
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ffs_init,
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};
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extern u_long nextgennumber;
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/*
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* Called by main() when ufs is going to be mounted as root.
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*
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* Name is updated by mount(8) after booting.
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*/
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#define ROOTNAME "root_device"
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ffs_mountroot()
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{
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extern struct vnode *rootvp;
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register struct fs *fs;
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register struct mount *mp;
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struct proc *p = curproc; /* XXX */
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struct ufsmount *ump;
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u_int size;
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int error;
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/*
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* Get vnodes for swapdev and rootdev.
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*/
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if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp))
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panic("ffs_mountroot: can't setup bdevvp's");
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mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
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bzero((char *)mp, (u_long)sizeof(struct mount));
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mp->mnt_op = &ufs_vfsops;
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mp->mnt_flag = MNT_RDONLY;
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if (error = ffs_mountfs(rootvp, mp, p)) {
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free(mp, M_MOUNT);
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return (error);
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}
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if (error = vfs_lock(mp)) {
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(void)ffs_unmount(mp, 0, p);
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free(mp, M_MOUNT);
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return (error);
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}
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TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
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mp->mnt_flag |= MNT_ROOTFS;
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mp->mnt_vnodecovered = NULLVP;
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ump = VFSTOUFS(mp);
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fs = ump->um_fs;
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bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
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fs->fs_fsmnt[0] = '/';
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bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
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MNAMELEN);
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(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
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&size);
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bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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(void)ffs_statfs(mp, &mp->mnt_stat, p);
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vfs_unlock(mp);
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inittodr(fs->fs_time);
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return (0);
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}
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/*
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* VFS Operations.
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*
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* mount system call
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*/
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int
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ffs_mount(mp, path, data, ndp, p)
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register struct mount *mp;
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char *path;
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caddr_t data;
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struct nameidata *ndp;
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struct proc *p;
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{
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struct vnode *devvp;
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struct ufs_args args;
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struct ufsmount *ump;
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register struct fs *fs;
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u_int size;
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int error, flags;
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if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
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return (error);
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/*
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* If updating, check whether changing from read-only to
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* read/write; if there is no device name, that's all we do.
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*/
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if (mp->mnt_flag & MNT_UPDATE) {
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ump = VFSTOUFS(mp);
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fs = ump->um_fs;
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error = 0;
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if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
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flags = WRITECLOSE;
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if (mp->mnt_flag & MNT_FORCE)
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flags |= FORCECLOSE;
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if (vfs_busy(mp))
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return (EBUSY);
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error = ffs_flushfiles(mp, flags, p);
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vfs_unbusy(mp);
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}
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if (!error && (mp->mnt_flag & MNT_RELOAD))
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error = ffs_reload(mp, ndp->ni_cnd.cn_cred, p);
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if (error)
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return (error);
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if (fs->fs_ronly && (mp->mnt_flag & MNT_WANTRDWR))
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fs->fs_ronly = 0;
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if (args.fspec == 0) {
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/*
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* Process export requests.
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*/
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return (vfs_export(mp, &ump->um_export, &args.export));
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}
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}
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/*
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* Not an update, or updating the name: look up the name
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* and verify that it refers to a sensible block device.
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*/
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NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
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if (error = namei(ndp))
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return (error);
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devvp = ndp->ni_vp;
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if (devvp->v_type != VBLK) {
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vrele(devvp);
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return (ENOTBLK);
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}
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if (major(devvp->v_rdev) >= nblkdev) {
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vrele(devvp);
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return (ENXIO);
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}
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if ((mp->mnt_flag & MNT_UPDATE) == 0)
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error = ffs_mountfs(devvp, mp, p);
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else {
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if (devvp != ump->um_devvp)
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error = EINVAL; /* needs translation */
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else
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vrele(devvp);
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}
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if (error) {
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vrele(devvp);
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return (error);
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}
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ump = VFSTOUFS(mp);
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fs = ump->um_fs;
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(void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
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bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
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bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
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MNAMELEN);
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(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
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&size);
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bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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(void)ffs_statfs(mp, &mp->mnt_stat, p);
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return (0);
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}
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/*
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* Reload all incore data for a filesystem (used after running fsck on
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* the root filesystem and finding things to fix). The filesystem must
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* be mounted read-only.
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*
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* Things to do to update the mount:
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* 1) invalidate all cached meta-data.
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* 2) re-read superblock from disk.
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* 3) re-read summary information from disk.
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* 4) invalidate all inactive vnodes.
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* 5) invalidate all cached file data.
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* 6) re-read inode data for all active vnodes.
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*/
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ffs_reload(mountp, cred, p)
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register struct mount *mountp;
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struct ucred *cred;
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struct proc *p;
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{
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register struct vnode *vp, *nvp, *devvp;
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struct inode *ip;
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struct csum *space;
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struct buf *bp;
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struct fs *fs;
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struct partinfo dpart;
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int i, blks, size, error;
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if ((mountp->mnt_flag & MNT_RDONLY) == 0)
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return (EINVAL);
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/*
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* Step 1: invalidate all cached meta-data.
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*/
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devvp = VFSTOUFS(mountp)->um_devvp;
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if (vinvalbuf(devvp, 0, cred, p, 0, 0))
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panic("ffs_reload: dirty1");
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/*
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* Step 2: re-read superblock from disk.
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*/
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if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
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size = DEV_BSIZE;
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else
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size = dpart.disklab->d_secsize;
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if (error = bread(devvp, (daddr_t)(SBOFF / size), SBSIZE, NOCRED, &bp))
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return (error);
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fs = (struct fs *)bp->b_data;
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if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
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fs->fs_bsize < sizeof(struct fs)) {
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brelse(bp);
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return (EIO); /* XXX needs translation */
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}
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fs = VFSTOUFS(mountp)->um_fs;
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bcopy(&fs->fs_csp[0], &((struct fs *)bp->b_data)->fs_csp[0],
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sizeof(fs->fs_csp));
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bcopy(bp->b_data, fs, (u_int)fs->fs_sbsize);
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if (fs->fs_sbsize < SBSIZE)
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bp->b_flags |= B_INVAL;
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brelse(bp);
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mountp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
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ffs_oldfscompat(fs);
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/*
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* Step 3: re-read summary information from disk.
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*/
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blks = howmany(fs->fs_cssize, fs->fs_fsize);
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space = fs->fs_csp[0];
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for (i = 0; i < blks; i += fs->fs_frag) {
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size = fs->fs_bsize;
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if (i + fs->fs_frag > blks)
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size = (blks - i) * fs->fs_fsize;
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if (error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
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NOCRED, &bp))
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return (error);
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bcopy(bp->b_data, fs->fs_csp[fragstoblks(fs, i)], (u_int)size);
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brelse(bp);
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}
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loop:
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for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
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nvp = vp->v_mntvnodes.le_next;
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/*
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* Step 4: invalidate all inactive vnodes.
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*/
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if (vp->v_usecount == 0) {
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vgone(vp);
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continue;
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}
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/*
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* Step 5: invalidate all cached file data.
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*/
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if (vget(vp, 1))
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goto loop;
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if (vinvalbuf(vp, 0, cred, p, 0, 0))
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panic("ffs_reload: dirty2");
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/*
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* Step 6: re-read inode data for all active vnodes.
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*/
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ip = VTOI(vp);
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if (error =
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bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
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(int)fs->fs_bsize, NOCRED, &bp)) {
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vput(vp);
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return (error);
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}
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ip->i_din = *((struct dinode *)bp->b_data +
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ino_to_fsbo(fs, ip->i_number));
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brelse(bp);
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vput(vp);
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if (vp->v_mount != mountp)
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goto loop;
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}
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return (0);
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}
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/*
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* Common code for mount and mountroot
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*/
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int
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ffs_mountfs(devvp, mp, p)
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register struct vnode *devvp;
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struct mount *mp;
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struct proc *p;
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{
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register struct ufsmount *ump;
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struct buf *bp;
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register struct fs *fs;
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dev_t dev = devvp->v_rdev;
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struct partinfo dpart;
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caddr_t base, space;
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int blks;
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int error, i, size;
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int ronly;
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extern struct vnode *rootvp;
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/*
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* Disallow multiple mounts of the same device.
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* Disallow mounting of a device that is currently in use
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* (except for root, which might share swap device for miniroot).
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* Flush out any old buffers remaining from a previous use.
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*/
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if (error = vfs_mountedon(devvp))
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return (error);
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if (vcount(devvp) > 1 && devvp != rootvp)
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return (EBUSY);
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if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))
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return (error);
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ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
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if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p))
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return (error);
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if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
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size = DEV_BSIZE;
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else
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size = dpart.disklab->d_secsize;
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bp = NULL;
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ump = NULL;
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if (error = bread(devvp, (daddr_t)(SBOFF / size), SBSIZE, NOCRED, &bp))
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goto out;
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fs = (struct fs *)bp->b_data;
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if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
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fs->fs_bsize < sizeof(struct fs)) {
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error = EINVAL; /* XXX needs translation */
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goto out;
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}
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/* XXX updating 4.2 FFS superblocks trashes rotational layout tables */
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if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
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error = EROFS; /* XXX what should be returned? */
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goto out;
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}
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ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
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bzero((caddr_t)ump, sizeof *ump);
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ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
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M_WAITOK);
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bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize);
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if (fs->fs_sbsize < SBSIZE)
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bp->b_flags |= B_INVAL;
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brelse(bp);
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bp = NULL;
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fs = ump->um_fs;
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fs->fs_ronly = ronly;
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if (ronly == 0)
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fs->fs_fmod = 1;
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blks = howmany(fs->fs_cssize, fs->fs_fsize);
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base = space = malloc((u_long)fs->fs_cssize, M_UFSMNT,
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M_WAITOK);
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for (i = 0; i < blks; i += fs->fs_frag) {
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size = fs->fs_bsize;
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if (i + fs->fs_frag > blks)
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size = (blks - i) * fs->fs_fsize;
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error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
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NOCRED, &bp);
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if (error) {
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free(base, M_UFSMNT);
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goto out;
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}
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bcopy(bp->b_data, space, (u_int)size);
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fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
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space += size;
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brelse(bp);
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bp = NULL;
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}
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mp->mnt_data = (qaddr_t)ump;
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mp->mnt_stat.f_fsid.val[0] = (long)dev;
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mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_UFS);
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mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
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mp->mnt_flag |= MNT_LOCAL;
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ump->um_mountp = mp;
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ump->um_dev = dev;
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ump->um_devvp = devvp;
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ump->um_nindir = fs->fs_nindir;
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ump->um_bptrtodb = fs->fs_fsbtodb;
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ump->um_seqinc = fs->fs_frag;
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for (i = 0; i < MAXQUOTAS; i++)
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ump->um_quotas[i] = NULLVP;
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devvp->v_specflags |= SI_MOUNTEDON;
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ffs_oldfscompat(fs);
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return (0);
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out:
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if (bp)
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brelse(bp);
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(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
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if (ump) {
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free(ump->um_fs, M_UFSMNT);
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free(ump, M_UFSMNT);
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mp->mnt_data = (qaddr_t)0;
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}
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return (error);
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}
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/*
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* Sanity checks for old file systems.
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*
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* XXX - goes away some day.
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*/
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ffs_oldfscompat(fs)
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struct fs *fs;
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{
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int i;
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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 */
|
|
#ifndef KLUGE_BEGONE
|
|
{
|
|
u_int64_t maxfilesize;
|
|
|
|
maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1;
|
|
if (fs->fs_maxfilesize > maxfilesize)
|
|
fs->fs_maxfilesize = maxfilesize;
|
|
}
|
|
#endif
|
|
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) {
|
|
if (mp->mnt_flag & MNT_ROOTFS)
|
|
return (EINVAL);
|
|
flags |= FORCECLOSE;
|
|
}
|
|
if (error = ffs_flushfiles(mp, flags, p))
|
|
return (error);
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_fs;
|
|
ronly = !fs->fs_ronly;
|
|
ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
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.
|
|
*/
|
|
ffs_flushfiles(mp, flags, p)
|
|
register struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
extern int doforce;
|
|
register struct ufsmount *ump;
|
|
int i, error;
|
|
|
|
if (!doforce)
|
|
flags &= ~FORCECLOSE;
|
|
ump = VFSTOUFS(mp);
|
|
#ifdef QUOTA
|
|
if (mp->mnt_flag & MNT_QUOTA) {
|
|
if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags))
|
|
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");
|
|
#ifdef COMPAT_09
|
|
sbp->f_type = 1;
|
|
#else
|
|
sbp->f_type = 0;
|
|
#endif
|
|
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 = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) -
|
|
(fs->fs_dsize - sbp->f_bfree);
|
|
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);
|
|
}
|
|
strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN);
|
|
sbp->f_fstypename[MFSNAMELEN] = '\0';
|
|
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;
|
|
register struct inode *ip;
|
|
register struct ufsmount *ump = VFSTOUFS(mp);
|
|
register struct fs *fs;
|
|
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 = vp->v_mntvnodes.le_next) {
|
|
/*
|
|
* 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;
|
|
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 (vget(vp, 1))
|
|
goto loop;
|
|
if (error = VOP_FSYNC(vp, cred, waitfor, p))
|
|
allerror = error;
|
|
vput(vp);
|
|
}
|
|
/*
|
|
* Force stale file system control information to be flushed.
|
|
*/
|
|
if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p))
|
|
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.
|
|
*/
|
|
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 i, type, error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
|
|
return (0);
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
if (error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) {
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */
|
|
MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK);
|
|
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
|
|
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);
|
|
|
|
/* Read in the disk contents for the inode, copy into the inode. */
|
|
if (error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
|
|
(int)fs->fs_bsize, NOCRED, &bp)) {
|
|
/*
|
|
* 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().
|
|
*/
|
|
vput(vp);
|
|
brelse(bp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
|
|
brelse(bp);
|
|
|
|
/*
|
|
* Initialize the vnode from the inode, check for aliases.
|
|
* Note that the underlying vnode may have changed.
|
|
*/
|
|
if (error = ufs_vinit(mp, ffs_specop_p, FFS_FIFOOPS, &vp)) {
|
|
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 */
|
|
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.
|
|
*/
|
|
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;
|
|
struct fs *cfs;
|
|
|
|
bp = getblk(mp->um_devvp, SBOFF >> (fs->fs_fshift - fs->fs_fsbtodb),
|
|
(int)fs->fs_sbsize, 0, 0);
|
|
bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize);
|
|
cfs = (struct fs *)bp->b_data;
|
|
/* Restore compatibility to old file systems. XXX */
|
|
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
|
|
cfs->fs_nrpos = -1; /* XXX */
|
|
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
int32_t *lp, tmp; /* XXX */
|
|
/* XXX */
|
|
lp = (int32_t *)&cfs->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 */
|
|
#ifndef KLUGE_BEGONE
|
|
{
|
|
u_int64_t sizepb = fs->fs_bsize; /* XXX */
|
|
/* XXX */
|
|
cfs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
|
|
for (i = 0; i < NIADDR; i++) { /* XXX */
|
|
sizepb *= NINDIR(fs); /* XXX */
|
|
cfs->fs_maxfilesize += sizepb; /* XXX */
|
|
} /* XXX */
|
|
}
|
|
#endif
|
|
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);
|
|
}
|