1005 lines
26 KiB
C
1005 lines
26 KiB
C
/* $NetBSD: ext2fs_vfsops.c,v 1.4 1997/10/09 15:42:53 bouyer Exp $ */
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/*
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* Copyright (c) 1997 Manuel Bouyer.
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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 8.14 (Berkeley) 11/28/94
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* Modified for ext2fs by Manuel Bouyer.
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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/device.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 <sys/lock.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/dir.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <ufs/ext2fs/ext2fs.h>
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#include <ufs/ext2fs/ext2fs_extern.h>
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extern struct lock ufs_hashlock;
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int ext2fs_sbupdate __P((struct ufsmount *, int));
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int ext2fs_check_export __P((struct mount *, struct ufid *, struct mbuf *,
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struct vnode **, int *, struct ucred **));
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struct vfsops ext2fs_vfsops = {
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MOUNT_EXT2FS,
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ext2fs_mount,
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ufs_start,
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ext2fs_unmount,
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ufs_root,
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ufs_quotactl,
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ext2fs_statfs,
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ext2fs_sync,
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ext2fs_vget,
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ext2fs_fhtovp,
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ext2fs_vptofh,
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ext2fs_init,
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ext2fs_mountroot,
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};
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extern u_long ext2gennumber;
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/*
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* This is the generic part of fhtovp called after the underlying
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* filesystem has validated the file handle.
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*
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* Verify that a host should have access to a filesystem, and if so
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* return a vnode for the presented file handle.
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*/
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int
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ext2fs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)
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register struct mount *mp;
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struct ufid *ufhp;
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struct mbuf *nam;
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struct vnode **vpp;
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int *exflagsp;
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struct ucred **credanonp;
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{
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register struct inode *ip;
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register struct netcred *np;
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register struct ufsmount *ump = VFSTOUFS(mp);
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struct vnode *nvp;
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int error;
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/*
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* Get the export permission structure for this <mp, client> tuple.
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*/
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np = vfs_export_lookup(mp, &ump->um_export, nam);
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if (np == NULL)
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return (EACCES);
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if ((error = VFS_VGET(mp, ufhp->ufid_ino, &nvp)) != 0) {
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*vpp = NULLVP;
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return (error);
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}
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ip = VTOI(nvp);
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if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0 ||
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ip->i_e2fs_gen != ufhp->ufid_gen) {
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vput(nvp);
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*vpp = NULLVP;
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return (ESTALE);
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}
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*vpp = nvp;
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*exflagsp = np->netc_exflags;
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*credanonp = &np->netc_anon;
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return (0);
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}
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/*
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* Called by main() when ext2fs 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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int
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ext2fs_mountroot()
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{
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extern struct vnode *rootvp;
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register struct m_ext2fs *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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size_t size;
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int error;
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if (root_device->dv_class != DV_DISK)
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return (ENODEV);
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/*
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* Get vnodes for rootdev.
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*/
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if (bdevvp(rootdev, &rootvp))
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panic("ext2fs_mountroot: can't setup bdevvp's");
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mp = malloc(sizeof(struct mount), M_MOUNT, M_WAITOK);
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bzero((char *)mp, sizeof(struct mount));
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mp->mnt_op = &ext2fs_vfsops;
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mp->mnt_flag = MNT_RDONLY;
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if ((error = ext2fs_mountfs(rootvp, mp, p)) != 0) {
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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)) != 0) {
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(void)ext2fs_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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CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
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mp->mnt_vnodecovered = NULLVP;
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ump = VFSTOUFS(mp);
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fs = ump->um_e2fs;
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bzero(fs->e2fs_fsmnt, sizeof(fs->e2fs_fsmnt));
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fs->e2fs_fsmnt[0] = '/';
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bcopy(fs->e2fs_fsmnt, mp->mnt_stat.f_mntonname, 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)ext2fs_statfs(mp, &mp->mnt_stat, p);
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vfs_unlock(mp);
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inittodr(fs->e2fs.e2fs_wtime);
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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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ext2fs_mount(mp, path, data, ndp, p)
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register struct mount *mp;
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const char *path;
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void * 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 = NULL;
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register struct m_ext2fs *fs;
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size_t size;
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int error, flags;
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mode_t accessmode;
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error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args));
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if (error)
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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_e2fs;
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if (fs->e2fs_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 = ext2fs_flushfiles(mp, flags, p);
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if (error == 0 &&
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ext2fs_cgupdate(ump, MNT_WAIT) == 0 &&
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(fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) {
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fs->e2fs.e2fs_state = E2FS_ISCLEAN;
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(void) ext2fs_sbupdate(ump, MNT_WAIT);
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}
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vfs_unbusy(mp);
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if (error)
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return (error);
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fs->e2fs_ronly = 1;
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}
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if (mp->mnt_flag & MNT_RELOAD) {
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error = ext2fs_reload(mp, ndp->ni_cnd.cn_cred, p);
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if (error)
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return (error);
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}
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if (fs->e2fs_ronly && (mp->mnt_flag & MNT_WANTRDWR)) {
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/*
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* If upgrade to read-write by non-root, then verify
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* that user has necessary permissions on the device.
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*/
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if (p->p_ucred->cr_uid != 0) {
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devvp = ump->um_devvp;
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VOP_LOCK(devvp);
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error = VOP_ACCESS(devvp, VREAD | VWRITE,
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p->p_ucred, p);
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if (error) {
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VOP_UNLOCK(devvp);
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return (error);
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}
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VOP_UNLOCK(devvp);
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}
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fs->e2fs_ronly = 0;
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if (fs->e2fs.e2fs_state == E2FS_ISCLEAN)
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fs->e2fs.e2fs_state = 0;
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else
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fs->e2fs.e2fs_state = E2FS_ERRORS;
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fs->e2fs_fmod = 1;
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}
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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)) != 0)
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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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/*
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* If mount by non-root, then verify that user has necessary
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* permissions on the device.
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*/
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if (p->p_ucred->cr_uid != 0) {
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accessmode = VREAD;
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if ((mp->mnt_flag & MNT_RDONLY) == 0)
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accessmode |= VWRITE;
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VOP_LOCK(devvp);
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error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p);
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if (error) {
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vput(devvp);
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return (error);
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}
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VOP_UNLOCK(devvp);
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}
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if ((mp->mnt_flag & MNT_UPDATE) == 0)
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error = ext2fs_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_e2fs;
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(void) copyinstr(path, fs->e2fs_fsmnt, sizeof(fs->e2fs_fsmnt) - 1, &size);
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bzero(fs->e2fs_fsmnt + size, sizeof(fs->e2fs_fsmnt) - size);
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bcopy(fs->e2fs_fsmnt, mp->mnt_stat.f_mntonname, 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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if (fs->e2fs_fmod != 0) { /* XXX */
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fs->e2fs_fmod = 0;
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if (fs->e2fs.e2fs_state == 0)
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fs->e2fs.e2fs_wtime = time.tv_sec;
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else
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printf("%s: file system not clean; please fsck(8)\n",
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mp->mnt_stat.f_mntfromname);
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(void) ext2fs_cgupdate(ump, MNT_WAIT);
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}
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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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int
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ext2fs_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 buf *bp;
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struct m_ext2fs *fs;
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struct ext2fs *newfs;
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struct partinfo dpart;
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int i, 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("ext2fs_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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error = bread(devvp, (daddr_t)(SBOFF / size), SBSIZE, NOCRED, &bp);
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if (error)
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return (error);
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newfs = (struct ext2fs *)bp->b_data;
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if (fs2h16(newfs->e2fs_magic) != E2FS_MAGIC ||
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fs2h32(newfs->e2fs_rev) != E2FS_REV) {
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#ifdef DIAGNOSTIC
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printf("Wrong magic number: %x (expected %x for ext2 fs)",
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fs2h16(newfs->e2fs_magic), E2FS_MAGIC);
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printf("or wrong revision number: %x (expected %x for ext2 fs)",
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fs2h32(newfs->e2fs_rev), E2FS_REV);
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#endif
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brelse(bp);
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return (EIO); /* XXX needs translation */
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}
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if (fs2h32(newfs->e2fs_log_bsize) > 2) { /* block size = 1024|2048|4096 */
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#ifdef DIAGNOSTIC
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printf("wrong block size: %d (expected <=2 for ext2 fs)\n",
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fs2h32(newfs->e2fs_log_bsize));
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#endif
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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_e2fs;
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/*
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* copy in new superblock, and compute in-memory values
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*/
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e2fs_sbload(newfs, &fs->e2fs);
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fs->e2fs_ncg = howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock,
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fs->e2fs.e2fs_bpg);
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/* XXX assume hw bsize = 512 */
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fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + 1;
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fs->e2fs_bsize = 1024 << fs->e2fs.e2fs_log_bsize;
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fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize;
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fs->e2fs_qbmask = fs->e2fs_bsize - 1;
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fs->e2fs_bmask = ~fs->e2fs_qbmask;
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fs->e2fs_ngdb = howmany(fs->e2fs_ncg,
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fs->e2fs_bsize / sizeof(struct ext2_gd));
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fs->e2fs_ipb = fs->e2fs_bsize / sizeof(struct ext2fs_dinode);
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fs->e2fs_itpg = fs->e2fs.e2fs_ipg/fs->e2fs_ipb;
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/*
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* Step 3: re-read summary information from disk.
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*/
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for (i=0; i < fs->e2fs_ngdb; i++) {
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error = bread(devvp , fsbtodb(fs, ((fs->e2fs_bsize>1024)?0:1)+i+1),
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fs->e2fs_bsize, NOCRED, &bp);
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if (error)
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return (error);
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e2fs_cgload((struct ext2_gd*)bp->b_data,
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&fs->e2fs_gd[i* fs->e2fs_bsize / sizeof(struct ext2_gd)],
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fs->e2fs_bsize);
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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("ext2fs_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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|
error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
|
|
(int)fs->e2fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
e2fs_iload((struct ext2fs_dinode *)bp->b_data +
|
|
ino_to_fsbo(fs, ip->i_number),
|
|
&ip->i_din.e2fs_din);
|
|
brelse(bp);
|
|
vput(vp);
|
|
if (vp->v_mount != mountp)
|
|
goto loop;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
int
|
|
ext2fs_mountfs(devvp, mp, p)
|
|
register struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
struct buf *bp;
|
|
register struct ext2fs *fs;
|
|
register struct m_ext2fs *m_fs;
|
|
dev_t dev;
|
|
struct partinfo dpart;
|
|
int error, i, size, ronly;
|
|
struct ucred *cred;
|
|
extern struct vnode *rootvp;
|
|
|
|
dev = devvp->v_rdev;
|
|
cred = p ? p->p_ucred : NOCRED;
|
|
/*
|
|
* Disallow multiple mounts of the same device.
|
|
* Disallow mounting of a device that is currently in use
|
|
* (except for root, which might share swap device for miniroot).
|
|
* Flush out any old buffers remaining from a previous use.
|
|
*/
|
|
if ((error = vfs_mountedon(devvp)) != 0)
|
|
return (error);
|
|
if (vcount(devvp) > 1 && devvp != rootvp)
|
|
return (EBUSY);
|
|
if ((error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0)) != 0)
|
|
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, cred, p) != 0)
|
|
size = DEV_BSIZE;
|
|
else
|
|
size = dpart.disklab->d_secsize;
|
|
|
|
bp = NULL;
|
|
ump = NULL;
|
|
|
|
#ifdef DEBUG_EXT2
|
|
printf("sb size: %d ino size %d\n", sizeof(struct ext2fs),
|
|
sizeof(struct ext2fs_dinode));
|
|
#endif
|
|
error = bread(devvp, (SBOFF / DEV_BSIZE), SBSIZE, cred, &bp);
|
|
if (error)
|
|
goto out;
|
|
fs = (struct ext2fs *)bp->b_data;
|
|
if (fs2h16(fs->e2fs_magic) != E2FS_MAGIC ||
|
|
fs2h32(fs->e2fs_rev) != E2FS_REV) {
|
|
#ifdef DIAGNOSTIC
|
|
printf("Wrong magic number: %x (expected %x for ext2 fs)",
|
|
fs2h16(fs->e2fs_magic), E2FS_MAGIC);
|
|
printf(" or wrong revision number: %x (expected %x for ext2 fs)\n",
|
|
fs2h32(fs->e2fs_rev), E2FS_REV);
|
|
#endif
|
|
error = EINVAL; /* XXX needs translation */
|
|
goto out;
|
|
}
|
|
|
|
if (fs2h32(fs->e2fs_log_bsize) > 2) { /* block size = 1024|2048|4096 */
|
|
#ifdef DIAGNOSTIC
|
|
printf("wrong block size: %d (expected <2 for ext2 fs)\n",
|
|
fs2h32(fs->e2fs_log_bsize));
|
|
#endif
|
|
error = EINVAL; /* XXX needs translation */
|
|
goto out;
|
|
}
|
|
|
|
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
|
|
bzero((caddr_t)ump, sizeof *ump);
|
|
ump->um_e2fs = malloc(sizeof(struct m_ext2fs), M_UFSMNT, M_WAITOK);
|
|
e2fs_sbload((struct ext2fs*)bp->b_data, &ump->um_e2fs->e2fs);
|
|
brelse(bp);
|
|
bp = NULL;
|
|
m_fs = ump->um_e2fs;
|
|
m_fs->e2fs_ronly = ronly;
|
|
if (ronly == 0) {
|
|
if (m_fs->e2fs.e2fs_state == E2FS_ISCLEAN)
|
|
m_fs->e2fs.e2fs_state = 0;
|
|
else
|
|
m_fs->e2fs.e2fs_state = E2FS_ERRORS;
|
|
m_fs->e2fs_fmod = 1;
|
|
}
|
|
|
|
/* compute dynamic sb infos */
|
|
m_fs->e2fs_ncg =
|
|
howmany(m_fs->e2fs.e2fs_bcount - m_fs->e2fs.e2fs_first_dblock,
|
|
m_fs->e2fs.e2fs_bpg);
|
|
/* XXX assume hw bsize = 512 */
|
|
m_fs->e2fs_fsbtodb = m_fs->e2fs.e2fs_log_bsize + 1;
|
|
m_fs->e2fs_bsize = 1024 << m_fs->e2fs.e2fs_log_bsize;
|
|
m_fs->e2fs_bshift = LOG_MINBSIZE + m_fs->e2fs.e2fs_log_bsize;
|
|
m_fs->e2fs_qbmask = m_fs->e2fs_bsize - 1;
|
|
m_fs->e2fs_bmask = ~m_fs->e2fs_qbmask;
|
|
m_fs->e2fs_ngdb = howmany(m_fs->e2fs_ncg,
|
|
m_fs->e2fs_bsize / sizeof(struct ext2_gd));
|
|
m_fs->e2fs_ipb = m_fs->e2fs_bsize / sizeof(struct ext2fs_dinode);
|
|
m_fs->e2fs_itpg = m_fs->e2fs.e2fs_ipg/m_fs->e2fs_ipb;
|
|
|
|
m_fs->e2fs_gd = malloc(m_fs->e2fs_ngdb * m_fs->e2fs_bsize,
|
|
M_UFSMNT, M_WAITOK);
|
|
for (i=0; i < m_fs->e2fs_ngdb; i++) {
|
|
error = bread(devvp , fsbtodb(m_fs, ((m_fs->e2fs_bsize>1024)?0:1)+i+1),
|
|
m_fs->e2fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
free(m_fs->e2fs_gd, M_UFSMNT);
|
|
goto out;
|
|
}
|
|
e2fs_cgload((struct ext2_gd*)bp->b_data,
|
|
&m_fs->e2fs_gd[i* m_fs->e2fs_bsize / sizeof(struct ext2_gd)],
|
|
m_fs->e2fs_bsize);
|
|
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] = makefstype(MOUNT_EXT2FS);
|
|
mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
ump->um_mountp = mp;
|
|
ump->um_dev = dev;
|
|
ump->um_devvp = devvp;
|
|
ump->um_nindir = NINDIR(m_fs);
|
|
ump->um_bptrtodb = m_fs->e2fs_fsbtodb;
|
|
ump->um_seqinc = 1; /* no frags */
|
|
devvp->v_specflags |= SI_MOUNTEDON;
|
|
return (0);
|
|
out:
|
|
if (bp)
|
|
brelse(bp);
|
|
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p);
|
|
if (ump) {
|
|
free(ump->um_e2fs, M_UFSMNT);
|
|
free(ump, M_UFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
int
|
|
ext2fs_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
register struct m_ext2fs *fs;
|
|
int error, flags;
|
|
|
|
flags = 0;
|
|
if (mntflags & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
if ((error = ext2fs_flushfiles(mp, flags, p)) != 0)
|
|
return (error);
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_e2fs;
|
|
if (fs->e2fs_ronly == 0 &&
|
|
ext2fs_cgupdate(ump, MNT_WAIT) == 0 &&
|
|
(fs->e2fs.e2fs_state & E2FS_ERRORS) == 0) {
|
|
fs->e2fs.e2fs_state = E2FS_ISCLEAN;
|
|
(void) ext2fs_sbupdate(ump, MNT_WAIT);
|
|
}
|
|
ump->um_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
error = VOP_CLOSE(ump->um_devvp, fs->e2fs_ronly ? FREAD : FREAD|FWRITE,
|
|
NOCRED, p);
|
|
vrele(ump->um_devvp);
|
|
free(fs->e2fs_gd, 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
|
|
ext2fs_flushfiles(mp, flags, p)
|
|
register struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
extern int doforce;
|
|
register struct ufsmount *ump;
|
|
int error;
|
|
|
|
if (!doforce)
|
|
flags &= ~FORCECLOSE;
|
|
ump = VFSTOUFS(mp);
|
|
error = vflush(mp, NULLVP, flags);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file system statistics.
|
|
*/
|
|
int
|
|
ext2fs_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
register struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
register struct ufsmount *ump;
|
|
register struct m_ext2fs *fs;
|
|
u_int32_t overhead, overhead_per_group;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
fs = ump->um_e2fs;
|
|
if (fs->e2fs.e2fs_magic != E2FS_MAGIC)
|
|
panic("ext2fs_statfs");
|
|
#ifdef COMPAT_09
|
|
sbp->f_type = 1;
|
|
#else
|
|
sbp->f_type = 0;
|
|
#endif
|
|
|
|
/*
|
|
* Compute the overhead (FS structures)
|
|
*/
|
|
overhead_per_group = 1 /* super block */ +
|
|
fs->e2fs_ngdb +
|
|
1 /* block bitmap */ +
|
|
1 /* inode bitmap */ +
|
|
fs->e2fs_itpg;
|
|
overhead = fs->e2fs.e2fs_first_dblock +
|
|
fs->e2fs_ncg * overhead_per_group;
|
|
|
|
|
|
sbp->f_bsize = fs->e2fs_bsize;
|
|
sbp->f_iosize = fs->e2fs_bsize;
|
|
sbp->f_blocks = fs->e2fs.e2fs_bcount - overhead;
|
|
sbp->f_bfree = fs->e2fs.e2fs_fbcount;
|
|
sbp->f_bavail = sbp->f_bfree - fs->e2fs.e2fs_rbcount;
|
|
sbp->f_files = fs->e2fs.e2fs_icount;
|
|
sbp->f_ffree = fs->e2fs.e2fs_ficount;
|
|
if (sbp != &mp->mnt_stat) {
|
|
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
|
|
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
|
|
}
|
|
strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
|
|
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
|
|
ext2fs_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 m_ext2fs *fs;
|
|
int error, allerror = 0;
|
|
|
|
fs = ump->um_e2fs;
|
|
/*
|
|
* Write back modified superblock.
|
|
* Consistency check that the superblock
|
|
* is still in the buffer cache.
|
|
*/
|
|
if (fs->e2fs_fmod != 0) {
|
|
if (fs->e2fs_ronly != 0) { /* XXX */
|
|
printf("fs = %s\n", fs->e2fs_fsmnt);
|
|
panic("update: rofs mod");
|
|
}
|
|
fs->e2fs_fmod = 0;
|
|
fs->e2fs.e2fs_wtime = time.tv_sec;
|
|
allerror = ext2fs_cgupdate(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)) != 0)
|
|
allerror = error;
|
|
vput(vp);
|
|
}
|
|
/*
|
|
* Force stale file system control information to be flushed.
|
|
*/
|
|
if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) != 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|
|
|
|
/*
|
|
* Look up a EXT2FS 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
|
|
ext2fs_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
register struct m_ext2fs *fs;
|
|
register struct inode *ip;
|
|
struct ufsmount *ump;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
dev_t dev;
|
|
int error;
|
|
|
|
ump = VFSTOUFS(mp);
|
|
dev = ump->um_dev;
|
|
do {
|
|
if ((*vpp = ufs_ihashget(dev, ino)) != NULL)
|
|
return (0);
|
|
} while (lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0, curproc));
|
|
|
|
/* Allocate a new vnode/inode. */
|
|
if ((error = getnewvnode(VT_EXT2FS, mp, ext2fs_vnodeop_p, &vp)) != 0) {
|
|
*vpp = NULL;
|
|
lockmgr(&ufs_hashlock, LK_RELEASE, 0, curproc);
|
|
return (error);
|
|
}
|
|
MALLOC(ip, struct inode *, sizeof(struct inode), M_EXT2FSNODE, M_WAITOK);
|
|
bzero((caddr_t)ip, sizeof(struct inode));
|
|
vp->v_data = ip;
|
|
ip->i_vnode = vp;
|
|
ip->i_e2fs = fs = ump->um_e2fs;
|
|
ip->i_dev = dev;
|
|
ip->i_number = ino;
|
|
ip->i_e2fs_last_lblk = 0;
|
|
ip->i_e2fs_last_blk = 0;
|
|
|
|
/*
|
|
* 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);
|
|
lockmgr(&ufs_hashlock, LK_RELEASE, 0, curproc);
|
|
|
|
/* 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->e2fs_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().
|
|
*/
|
|
vput(vp);
|
|
brelse(bp);
|
|
*vpp = NULL;
|
|
return (error);
|
|
}
|
|
e2fs_iload((struct ext2fs_dinode*)bp->b_data + ino_to_fsbo(fs, ino),
|
|
&ip->i_din.e2fs_din);
|
|
brelse(bp);
|
|
|
|
/*
|
|
* Initialize the vnode from the inode, check for aliases.
|
|
* Note that the underlying vnode may have changed.
|
|
*/
|
|
error = ufs_vinit(mp, ext2fs_specop_p, EXT2FS_FIFOOPS, &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_e2fs_gen == 0) {
|
|
if (++ext2gennumber < (u_long)time.tv_sec)
|
|
ext2gennumber = time.tv_sec;
|
|
ip->i_e2fs_gen = ext2gennumber;
|
|
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
|
|
ip->i_flag |= IN_MODIFIED;
|
|
}
|
|
|
|
*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 ext2fs_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
|
|
ext2fs_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 m_ext2fs *fs;
|
|
|
|
ufhp = (struct ufid *)fhp;
|
|
fs = VFSTOUFS(mp)->um_e2fs;
|
|
if ((ufhp->ufid_ino < EXT2_FIRSTINO && ufhp->ufid_ino != EXT2_ROOTINO) ||
|
|
ufhp->ufid_ino >= fs->e2fs_ncg * fs->e2fs.e2fs_ipg)
|
|
return (ESTALE);
|
|
return (ext2fs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp));
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
ext2fs_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_e2fs_gen;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Write a superblock and associated information back to disk.
|
|
*/
|
|
int
|
|
ext2fs_sbupdate(mp, waitfor)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
{
|
|
register struct m_ext2fs *fs = mp->um_e2fs;
|
|
register struct buf *bp;
|
|
int error = 0;
|
|
|
|
bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0);
|
|
e2fs_sbsave(&fs->e2fs, (struct ext2fs*)bp->b_data);
|
|
if (waitfor == MNT_WAIT)
|
|
error = bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
ext2fs_cgupdate(mp, waitfor)
|
|
struct ufsmount *mp;
|
|
int waitfor;
|
|
{
|
|
register struct m_ext2fs *fs = mp->um_e2fs;
|
|
register struct buf *bp;
|
|
int i, error = 0, allerror = 0;
|
|
|
|
allerror = ext2fs_sbupdate(mp, waitfor);
|
|
for (i = 0; i < fs->e2fs_ngdb; i++) {
|
|
bp = getblk(mp->um_devvp, fsbtodb(fs, ((fs->e2fs_bsize>1024)?0:1)+i+1),
|
|
fs->e2fs_bsize, 0, 0);
|
|
e2fs_cgsave(&fs->e2fs_gd[i* fs->e2fs_bsize / sizeof(struct ext2_gd)],
|
|
(struct ext2_gd*)bp->b_data, fs->e2fs_bsize);
|
|
if (waitfor == MNT_WAIT)
|
|
error = bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
}
|
|
|
|
if (!allerror && error)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|