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https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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628641f8a6
Partially obtained from: 4.4BSD-Lite2
703 lines
17 KiB
C
703 lines
17 KiB
C
/*-
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* Copyright (c) 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley
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* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
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* Support code is derived from software contributed to Berkeley
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* by Atsushi Murai (amurai@spec.co.jp).
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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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* @(#)cd9660_vfsops.c 8.3 (Berkeley) 1/31/94
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* $Id: cd9660_vfsops.c,v 1.13 1995/05/30 08:05:03 rgrimes Exp $
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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 <miscfs/specfs/specdev.h>
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#include <sys/mount.h>
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#include <sys/buf.h>
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#include <sys/file.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 <isofs/cd9660/iso.h>
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#include <isofs/cd9660/cd9660_node.h>
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#include <isofs/cd9660/iso_rrip.h>
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struct vfsops cd9660_vfsops = {
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cd9660_mount,
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cd9660_start,
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cd9660_unmount,
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cd9660_root,
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cd9660_quotactl,
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cd9660_statfs,
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cd9660_sync,
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cd9660_vget,
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cd9660_fhtovp,
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cd9660_vptofh,
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cd9660_init,
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};
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VFS_SET(cd9660_vfsops, cd9660, MOUNT_CD9660, VFCF_READONLY);
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/*
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* Called by vfs_mountroot when iso 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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static int iso_mountfs __P((struct vnode *devvp, struct mount *mp,
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struct proc *p, struct iso_args *argp));
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int
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cd9660_mountroot()
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{
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register struct mount *mp;
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struct proc *p = curproc; /* XXX */
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struct iso_mnt *imp;
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u_int size;
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int error;
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struct iso_args args;
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/*
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* Get vnode for rootdev.
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*/
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if (bdevvp(rootdev, &rootvp))
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panic("cd9660_mountroot: can't setup bdevvp for rootdev");
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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 = &cd9660_vfsops;
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mp->mnt_flag = MNT_RDONLY;
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args.flags = ISOFSMNT_ROOT;
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if ((error = iso_mountfs(rootvp, mp, p, &args))) {
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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)cd9660_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_flag |= MNT_ROOTFS;
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mp->mnt_vnodecovered = NULLVP;
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imp = VFSTOISOFS(mp);
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bzero(imp->im_fsmnt, sizeof(imp->im_fsmnt));
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imp->im_fsmnt[0] = '/';
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bcopy((caddr_t)imp->im_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) cd9660_statfs(mp, &mp->mnt_stat, p);
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vfs_unlock(mp);
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return (0);
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}
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/*
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* Flag to allow forcible unmounting.
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*/
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int iso_doforce = 1;
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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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cd9660_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 iso_args args;
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u_int size;
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int error;
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struct iso_mnt *imp = 0;
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if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))))
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return (error);
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if ((mp->mnt_flag & MNT_RDONLY) == 0)
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return (EROFS);
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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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imp = VFSTOISOFS(mp);
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if (args.fspec == 0)
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return (vfs_export(mp, &imp->im_export, &args.export));
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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 = iso_mountfs(devvp, mp, p, &args);
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else {
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if (devvp != imp->im_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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imp = VFSTOISOFS(mp);
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(void) copyinstr(path, imp->im_fsmnt, sizeof(imp->im_fsmnt)-1, &size);
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bzero(imp->im_fsmnt + size, sizeof(imp->im_fsmnt) - size);
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bcopy((caddr_t)imp->im_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) cd9660_statfs(mp, &mp->mnt_stat, p);
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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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static int
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iso_mountfs(devvp, mp, p, argp)
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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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struct iso_args *argp;
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{
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register struct iso_mnt *isomp = (struct iso_mnt *)0;
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struct buf *bp = NULL;
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dev_t dev = devvp->v_rdev;
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int error = EINVAL;
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int needclose = 0;
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int high_sierra = 0;
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int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
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int iso_bsize;
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int iso_blknum;
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struct iso_volume_descriptor *vdp;
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struct iso_primary_descriptor *pri;
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struct iso_sierra_primary_descriptor *pri_sierra;
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struct iso_directory_record *rootp;
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int logical_block_size;
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if (!ronly)
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return EROFS;
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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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if ((error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)))
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return error;
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needclose = 1;
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/* This is the "logical sector size". The standard says this
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* should be 2048 or the physical sector size on the device,
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* whichever is greater. For now, we'll just use a constant.
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*/
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iso_bsize = ISO_DEFAULT_BLOCK_SIZE;
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for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
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if ((error = bread (devvp, btodb(iso_blknum * iso_bsize),
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iso_bsize, NOCRED, &bp)))
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goto out;
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vdp = (struct iso_volume_descriptor *)bp->b_un.b_addr;
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if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
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if (bcmp (vdp->id_sierra, ISO_SIERRA_ID,
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sizeof vdp->id) != 0) {
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error = EINVAL;
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goto out;
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} else
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high_sierra = 1;
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}
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if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_END) {
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error = EINVAL;
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goto out;
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}
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if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) == ISO_VD_PRIMARY)
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break;
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brelse(bp);
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}
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if (isonum_711 (high_sierra? vdp->type_sierra: vdp->type) != ISO_VD_PRIMARY) {
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error = EINVAL;
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goto out;
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}
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pri = (struct iso_primary_descriptor *)vdp;
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pri_sierra = (struct iso_sierra_primary_descriptor *)vdp;
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logical_block_size =
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isonum_723 (high_sierra?
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pri_sierra->logical_block_size:
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pri->logical_block_size);
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if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE
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|| (logical_block_size & (logical_block_size - 1)) != 0) {
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error = EINVAL;
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goto out;
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}
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rootp = (struct iso_directory_record *)
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(high_sierra?
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pri_sierra->root_directory_record:
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pri->root_directory_record);
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isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK);
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bzero((caddr_t)isomp, sizeof *isomp);
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isomp->logical_block_size = logical_block_size;
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isomp->volume_space_size =
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isonum_733 (high_sierra?
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pri_sierra->volume_space_size:
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pri->volume_space_size);
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bcopy (rootp, isomp->root, sizeof isomp->root);
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isomp->root_extent = isonum_733 (rootp->extent);
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isomp->root_size = isonum_733 (rootp->size);
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isomp->im_bmask = logical_block_size - 1;
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isomp->im_bshift = 0;
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while ((1 << isomp->im_bshift) < isomp->logical_block_size)
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isomp->im_bshift++;
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bp->b_flags |= B_AGE;
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brelse(bp);
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bp = NULL;
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mp->mnt_data = (qaddr_t)isomp;
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mp->mnt_stat.f_fsid.val[0] = (long)dev;
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mp->mnt_stat.f_fsid.val[1] = MOUNT_CD9660;
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mp->mnt_maxsymlinklen = 0;
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mp->mnt_flag |= MNT_LOCAL;
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isomp->im_mountp = mp;
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isomp->im_dev = dev;
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isomp->im_devvp = devvp;
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devvp->v_specflags |= SI_MOUNTEDON;
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/* Check the Rock Ridge Extention support */
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if (!(argp->flags & ISOFSMNT_NORRIP)) {
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if ((error = bread (isomp->im_devvp,
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(isomp->root_extent + isonum_711(rootp->ext_attr_length))
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* isomp->logical_block_size / DEV_BSIZE,
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isomp->logical_block_size,NOCRED,&bp)))
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goto out;
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rootp = (struct iso_directory_record *)bp->b_un.b_addr;
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if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) {
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argp->flags |= ISOFSMNT_NORRIP;
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} else {
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argp->flags &= ~ISOFSMNT_GENS;
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}
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/*
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* The contents are valid,
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* but they will get reread as part of another vnode, so...
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*/
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bp->b_flags |= B_AGE;
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brelse(bp);
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bp = NULL;
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}
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isomp->im_flags = argp->flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS|ISOFSMNT_EXTATT);
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if(high_sierra)
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/* this effectively ignores all the mount flags */
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isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
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else
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switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
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default:
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isomp->iso_ftype = ISO_FTYPE_DEFAULT;
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break;
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case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
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isomp->iso_ftype = ISO_FTYPE_9660;
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break;
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case 0:
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isomp->iso_ftype = ISO_FTYPE_RRIP;
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break;
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}
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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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if (needclose)
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(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
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if (isomp) {
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free((caddr_t)isomp, M_ISOFSMNT);
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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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* Make a filesystem operational.
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* Nothing to do at the moment.
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*/
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/* ARGSUSED */
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int
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cd9660_start(mp, flags, p)
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struct mount *mp;
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int flags;
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struct proc *p;
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{
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return 0;
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}
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/*
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* unmount system call
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*/
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int
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cd9660_unmount(mp, mntflags, p)
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struct mount *mp;
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int mntflags;
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struct proc *p;
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{
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register struct iso_mnt *isomp;
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int error, flags = 0;
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if (mntflags & MNT_FORCE) {
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if (!iso_doforce)
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return (EINVAL);
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flags |= FORCECLOSE;
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}
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#if 0
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mntflushbuf(mp, 0);
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if (mntinvalbuf(mp))
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return EBUSY;
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#endif
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if ((error = vflush(mp, NULLVP, flags)))
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return (error);
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isomp = VFSTOISOFS(mp);
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#ifdef ISODEVMAP
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if (isomp->iso_ftype == ISO_FTYPE_RRIP)
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iso_dunmap(isomp->im_dev);
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#endif
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isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON;
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error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p);
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vrele(isomp->im_devvp);
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free((caddr_t)isomp, M_ISOFSMNT);
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mp->mnt_data = (qaddr_t)0;
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mp->mnt_flag &= ~MNT_LOCAL;
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return (error);
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}
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/*
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* Return root of a filesystem
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*/
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int
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cd9660_root(mp, vpp)
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struct mount *mp;
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struct vnode **vpp;
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{
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register struct iso_node *ip;
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struct iso_node tip, *nip;
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struct vnode tvp;
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int error;
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struct iso_mnt *imp = VFSTOISOFS (mp);
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struct iso_directory_record *dp;
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tvp.v_mount = mp;
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tvp.v_data = &tip;
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ip = VTOI(&tvp);
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ip->i_vnode = &tvp;
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ip->i_dev = imp->im_dev;
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ip->i_diroff = 0;
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dp = (struct iso_directory_record *)imp->root;
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isodirino(&ip->i_number,dp,imp);
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/*
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* With RRIP we must use the `.' entry of the root directory.
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* Simply tell iget, that it's a relocated directory.
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*/
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error = iso_iget(ip,ip->i_number,
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imp->iso_ftype == ISO_FTYPE_RRIP,
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&nip,dp);
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if (error)
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return error;
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*vpp = ITOV(nip);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Do operations associated with quotas, not supported
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
cd9660_quotactl(mp, cmd, uid, arg, p)
|
|
struct mount *mp;
|
|
int cmd;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* Get file system statistics.
|
|
*/
|
|
int
|
|
cd9660_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
register struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
register struct iso_mnt *isomp;
|
|
|
|
isomp = VFSTOISOFS(mp);
|
|
|
|
sbp->f_type = MOUNT_CD9660;
|
|
sbp->f_bsize = isomp->logical_block_size;
|
|
sbp->f_iosize = sbp->f_bsize; /* XXX */
|
|
sbp->f_blocks = isomp->volume_space_size;
|
|
sbp->f_bfree = 0; /* total free blocks */
|
|
sbp->f_bavail = 0; /* blocks free for non superuser */
|
|
sbp->f_files = 0; /* total files */
|
|
sbp->f_ffree = 0; /* free file nodes */
|
|
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);
|
|
}
|
|
/* Use the first spare for flags: */
|
|
sbp->f_spare[0] = isomp->im_flags;
|
|
return 0;
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
cd9660_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Flat namespace lookup.
|
|
* Currently unsupported.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
cd9660_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* File handle to vnode
|
|
*
|
|
* Have to be really careful about stale file handles:
|
|
* - check that the inode number is in range
|
|
* - call iget() to get the locked inode
|
|
* - check for an unallocated inode (i_mode == 0)
|
|
* - check that the generation number matches
|
|
*/
|
|
|
|
struct ifid {
|
|
ushort ifid_len;
|
|
ushort ifid_pad;
|
|
int ifid_ino;
|
|
long ifid_start;
|
|
};
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
cd9660_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;
|
|
{
|
|
struct vnode tvp;
|
|
int error;
|
|
int lbn, off;
|
|
struct ifid *ifhp;
|
|
struct iso_mnt *imp;
|
|
struct buf *bp;
|
|
struct iso_directory_record *dirp;
|
|
struct iso_node tip, *ip, *nip;
|
|
struct netcred *np;
|
|
|
|
imp = VFSTOISOFS (mp);
|
|
ifhp = (struct ifid *)fhp;
|
|
|
|
#ifdef ISOFS_DBG
|
|
printf("fhtovp: ino %d, start %ld\n",
|
|
ifhp->ifid_ino, ifhp->ifid_start);
|
|
#endif
|
|
|
|
np = vfs_export_lookup(mp, &imp->im_export, nam);
|
|
if (np == NULL)
|
|
return (EACCES);
|
|
|
|
lbn = iso_lblkno(imp, ifhp->ifid_ino);
|
|
if (lbn >= imp->volume_space_size) {
|
|
printf("fhtovp: lbn exceed volume space %d\n", lbn);
|
|
return (ESTALE);
|
|
}
|
|
|
|
off = iso_blkoff(imp, ifhp->ifid_ino);
|
|
if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
|
|
printf("fhtovp: crosses block boundary %d\n",
|
|
off + ISO_DIRECTORY_RECORD_SIZE);
|
|
return (ESTALE);
|
|
}
|
|
|
|
error = bread(imp->im_devvp, btodb(lbn * imp->logical_block_size),
|
|
imp->logical_block_size, NOCRED, &bp);
|
|
if (error) {
|
|
printf("fhtovp: bread error %d\n",error);
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
|
|
dirp = (struct iso_directory_record *)(bp->b_un.b_addr + off);
|
|
if (off + isonum_711(dirp->length) > imp->logical_block_size) {
|
|
brelse(bp);
|
|
printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
|
|
off+isonum_711(dirp->length), off,
|
|
isonum_711(dirp->length));
|
|
return (ESTALE);
|
|
}
|
|
|
|
if (isonum_733(dirp->extent) + isonum_711(dirp->ext_attr_length) !=
|
|
ifhp->ifid_start) {
|
|
brelse(bp);
|
|
printf("fhtovp: file start miss %d vs %ld\n",
|
|
isonum_733(dirp->extent)+isonum_711(dirp->ext_attr_length),
|
|
ifhp->ifid_start);
|
|
return (ESTALE);
|
|
}
|
|
brelse(bp);
|
|
|
|
ip = &tip;
|
|
tvp.v_mount = mp;
|
|
tvp.v_data = ip;
|
|
ip->i_vnode = &tvp;
|
|
ip->i_dev = imp->im_dev;
|
|
if ((error = iso_iget(ip, ifhp->ifid_ino, 0, &nip, dirp))) {
|
|
*vpp = NULLVP;
|
|
printf("fhtovp: failed to get inode\n");
|
|
return (error);
|
|
}
|
|
ip = nip;
|
|
/*
|
|
* XXX need generation number?
|
|
*/
|
|
if (ip->inode.iso_mode == 0) {
|
|
iso_iput(ip);
|
|
*vpp = NULLVP;
|
|
printf("fhtovp: inode mode == 0\n");
|
|
return (ESTALE);
|
|
}
|
|
*vpp = ITOV(ip);
|
|
*exflagsp = np->netc_exflags;
|
|
*credanonp = &np->netc_anon;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
cd9660_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
register struct iso_node *ip = VTOI(vp);
|
|
register struct ifid *ifhp;
|
|
|
|
ifhp = (struct ifid *)fhp;
|
|
ifhp->ifid_len = sizeof(struct ifid);
|
|
|
|
ifhp->ifid_ino = ip->i_number;
|
|
ifhp->ifid_start = ip->iso_start;
|
|
|
|
#ifdef ISOFS_DBG
|
|
printf("vptofh: ino %d, start %ld\n",
|
|
ifhp->ifid_ino,ifhp->ifid_start);
|
|
#endif
|
|
return 0;
|
|
}
|