899 lines
22 KiB
C
899 lines
22 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 8.18 (Berkeley) 5/22/95
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* $FreeBSD$
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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/mount.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/cdio.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <sys/stat.h>
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#include <sys/syslog.h>
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#include <isofs/cd9660/iso.h>
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#include <isofs/cd9660/iso_rrip.h>
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#include <isofs/cd9660/cd9660_node.h>
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#include <isofs/cd9660/cd9660_mount.h>
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MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure");
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MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part");
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static vfs_mount_t cd9660_mount;
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static vfs_unmount_t cd9660_unmount;
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static vfs_root_t cd9660_root;
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static vfs_statfs_t cd9660_statfs;
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static vfs_vget_t cd9660_vget;
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static vfs_fhtovp_t cd9660_fhtovp;
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static vfs_vptofh_t cd9660_vptofh;
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static struct vfsops cd9660_vfsops = {
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cd9660_mount,
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vfs_stdstart,
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cd9660_unmount,
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cd9660_root,
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vfs_stdquotactl,
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cd9660_statfs,
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vfs_stdsync,
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cd9660_vget,
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cd9660_fhtovp,
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vfs_stdcheckexp,
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cd9660_vptofh,
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cd9660_init,
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cd9660_uninit,
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vfs_stdextattrctl,
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};
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VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY);
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MODULE_VERSION(cd9660, 1);
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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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static int iso_get_ssector(dev_t dev, struct thread *td);
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static int iso_mountfs(struct vnode *devvp, struct mount *mp,
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struct thread *td, struct iso_args *argp);
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/*
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* Try to find the start of the last data track on this CD-ROM. This
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* is used to mount the last session of a multi-session CD. Bail out
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* and return 0 if we fail, this is always a safe bet.
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*/
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static int
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iso_get_ssector(dev, td)
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dev_t dev;
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struct thread *td;
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{
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struct ioc_toc_header h;
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struct ioc_read_toc_single_entry t;
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int i;
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struct cdevsw *bd;
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d_ioctl_t *ioctlp;
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bd = devsw(dev);
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ioctlp = bd->d_ioctl;
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if (ioctlp == NULL)
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return 0;
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if (ioctlp(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, td) != 0)
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return 0;
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for (i = h.ending_track; i >= 0; i--) {
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t.address_format = CD_LBA_FORMAT;
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t.track = i;
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if (ioctlp(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, td) != 0)
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return 0;
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if ((t.entry.control & 4) != 0)
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/* found a data track */
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break;
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}
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if (i < 0)
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return 0;
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return ntohl(t.entry.addr.lba);
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}
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static int iso_mountroot(struct mount *mp, struct thread *td);
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static int
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iso_mountroot(mp, td)
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struct mount *mp;
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struct thread *td;
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{
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struct iso_args args;
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int error;
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if ((error = bdevvp(rootdev, &rootvp))) {
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printf("iso_mountroot: can't find rootvp\n");
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return (error);
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}
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args.flags = ISOFSMNT_ROOT;
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vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY, td);
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error = VOP_OPEN(rootvp, FREAD, FSCRED, td);
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VOP_UNLOCK(rootvp, 0, td);
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if (error)
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return error;
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args.ssector = iso_get_ssector(rootdev, td);
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(void)VOP_CLOSE(rootvp, FREAD, NOCRED, td);
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if (bootverbose)
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printf("iso_mountroot(): using session at block %d\n",
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args.ssector);
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if ((error = iso_mountfs(rootvp, mp, td, &args)) != 0)
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return (error);
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(void)cd9660_statfs(mp, &mp->mnt_stat, td);
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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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static int
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cd9660_mount(mp, path, data, ndp, td)
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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 thread *td;
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{
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struct vnode *devvp;
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struct iso_args args;
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size_t size;
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int error;
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mode_t accessmode;
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struct iso_mnt *imp = 0;
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if (path == NULL) /* We are doing the initial root mount */
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return (iso_mountroot(mp, td));
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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, &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, td);
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if ((error = namei(ndp)))
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return (error);
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NDFREE(ndp, NDF_ONLY_PNBUF);
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devvp = ndp->ni_vp;
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if (!vn_isdisk(devvp, &error)) {
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vrele(devvp);
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return (error);
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}
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/*
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* Verify that user has necessary permissions on the device,
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* or has superuser abilities
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*/
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accessmode = VREAD;
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td);
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if (error)
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error = suser(td);
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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, 0, td);
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if ((mp->mnt_flag & MNT_UPDATE) == 0) {
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error = iso_mountfs(devvp, mp, td, &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(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, td);
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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, td, argp)
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register struct vnode *devvp;
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struct mount *mp;
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struct thread *td;
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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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struct buf *pribp = NULL, *supbp = 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 iso_bsize;
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int iso_blknum;
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int joliet_level;
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struct iso_volume_descriptor *vdp = 0;
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struct iso_primary_descriptor *pri = NULL;
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struct iso_sierra_primary_descriptor *pri_sierra = NULL;
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struct iso_supplementary_descriptor *sup = NULL;
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struct iso_directory_record *rootp;
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int logical_block_size;
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if (!(mp->mnt_flag & MNT_RDONLY))
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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, td->td_ucred, td, 0, 0)))
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return (error);
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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error = VOP_OPEN(devvp, FREAD, FSCRED, td);
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VOP_UNLOCK(devvp, 0, td);
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if (error)
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return error;
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if (devvp->v_rdev->si_iosize_max != 0)
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mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
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if (mp->mnt_iosize_max > MAXPHYS)
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mp->mnt_iosize_max = MAXPHYS;
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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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joliet_level = 0;
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for (iso_blknum = 16 + argp->ssector;
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iso_blknum < 100 + argp->ssector;
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iso_blknum++) {
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if ((error = bread(devvp, iso_blknum * btodb(iso_bsize),
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iso_bsize, NOCRED, &bp)) != 0)
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goto out;
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vdp = (struct iso_volume_descriptor *)bp->b_data;
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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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switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){
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case ISO_VD_PRIMARY:
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if (pribp == NULL) {
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pribp = bp;
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bp = NULL;
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pri = (struct iso_primary_descriptor *)vdp;
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pri_sierra =
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(struct iso_sierra_primary_descriptor *)vdp;
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}
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break;
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case ISO_VD_SUPPLEMENTARY:
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if (supbp == NULL) {
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supbp = bp;
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bp = NULL;
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sup = (struct iso_supplementary_descriptor *)vdp;
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if (!(argp->flags & ISOFSMNT_NOJOLIET)) {
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if (bcmp(sup->escape, "%/@", 3) == 0)
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joliet_level = 1;
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if (bcmp(sup->escape, "%/C", 3) == 0)
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joliet_level = 2;
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if (bcmp(sup->escape, "%/E", 3) == 0)
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joliet_level = 3;
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if ((isonum_711 (sup->flags) & 1) &&
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(argp->flags & ISOFSMNT_BROKENJOLIET) == 0)
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joliet_level = 0;
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}
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}
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break;
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case ISO_VD_END:
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goto vd_end;
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default:
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break;
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}
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if (bp) {
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brelse(bp);
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bp = NULL;
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}
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}
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vd_end:
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if (bp) {
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brelse(bp);
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bp = NULL;
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}
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if (pri == NULL) {
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error = EINVAL;
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goto out;
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}
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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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|
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isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_ZERO);
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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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isomp->joliet_level = 0;
|
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/*
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* Since an ISO9660 multi-session CD can also access previous
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* sessions, we have to include them into the space consider-
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* ations. This doesn't yield a very accurate number since
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* parts of the old sessions might be inaccessible now, but we
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* can't do much better. This is also important for the NFS
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* filehandle validation.
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*/
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isomp->volume_space_size += argp->ssector;
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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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|
|
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isomp->im_bmask = logical_block_size - 1;
|
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isomp->im_bshift = ffs(logical_block_size) - 1;
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|
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pribp->b_flags |= B_AGE;
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brelse(pribp);
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pribp = NULL;
|
|
|
|
mp->mnt_data = (qaddr_t)isomp;
|
|
mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
|
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mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
|
|
mp->mnt_maxsymlinklen = 0;
|
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mp->mnt_flag |= MNT_LOCAL;
|
|
isomp->im_mountp = mp;
|
|
isomp->im_dev = dev;
|
|
isomp->im_devvp = devvp;
|
|
|
|
devvp->v_rdev->si_mountpoint = mp;
|
|
|
|
/* Check the Rock Ridge Extention support */
|
|
if (!(argp->flags & ISOFSMNT_NORRIP)) {
|
|
if ((error = bread(isomp->im_devvp,
|
|
(isomp->root_extent + isonum_711(rootp->ext_attr_length)) <<
|
|
(isomp->im_bshift - DEV_BSHIFT),
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isomp->logical_block_size, NOCRED, &bp)) != 0)
|
|
goto out;
|
|
|
|
rootp = (struct iso_directory_record *)bp->b_data;
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* The contents are valid,
|
|
* but they will get reread as part of another vnode, so...
|
|
*/
|
|
bp->b_flags |= B_AGE;
|
|
brelse(bp);
|
|
bp = NULL;
|
|
}
|
|
isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS |
|
|
ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET);
|
|
|
|
if (high_sierra) {
|
|
/* this effectively ignores all the mount flags */
|
|
log(LOG_INFO, "cd9660: High Sierra Format\n");
|
|
isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA;
|
|
} else
|
|
switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) {
|
|
default:
|
|
isomp->iso_ftype = ISO_FTYPE_DEFAULT;
|
|
break;
|
|
case ISOFSMNT_GENS|ISOFSMNT_NORRIP:
|
|
isomp->iso_ftype = ISO_FTYPE_9660;
|
|
break;
|
|
case 0:
|
|
log(LOG_INFO, "cd9660: RockRidge Extension\n");
|
|
isomp->iso_ftype = ISO_FTYPE_RRIP;
|
|
break;
|
|
}
|
|
|
|
/* Decide whether to use the Joliet descriptor */
|
|
|
|
if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) {
|
|
log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level);
|
|
rootp = (struct iso_directory_record *)
|
|
sup->root_directory_record;
|
|
bcopy (rootp, isomp->root, sizeof isomp->root);
|
|
isomp->root_extent = isonum_733 (rootp->extent);
|
|
isomp->root_size = isonum_733 (rootp->size);
|
|
isomp->joliet_level = joliet_level;
|
|
supbp->b_flags |= B_AGE;
|
|
}
|
|
|
|
if (supbp) {
|
|
brelse(supbp);
|
|
supbp = NULL;
|
|
}
|
|
|
|
return 0;
|
|
out:
|
|
devvp->v_rdev->si_mountpoint = NULL;
|
|
if (bp)
|
|
brelse(bp);
|
|
if (pribp)
|
|
brelse(pribp);
|
|
if (supbp)
|
|
brelse(supbp);
|
|
if (needclose)
|
|
(void)VOP_CLOSE(devvp, FREAD, NOCRED, td);
|
|
if (isomp) {
|
|
free((caddr_t)isomp, M_ISOFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
static int
|
|
cd9660_unmount(mp, mntflags, td)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct thread *td;
|
|
{
|
|
register struct iso_mnt *isomp;
|
|
int error, flags = 0;
|
|
|
|
if (mntflags & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
#if 0
|
|
mntflushbuf(mp, 0);
|
|
if (mntinvalbuf(mp))
|
|
return EBUSY;
|
|
#endif
|
|
if ((error = vflush(mp, 0, flags)))
|
|
return (error);
|
|
|
|
isomp = VFSTOISOFS(mp);
|
|
|
|
isomp->im_devvp->v_rdev->si_mountpoint = NULL;
|
|
error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, td);
|
|
vrele(isomp->im_devvp);
|
|
free((caddr_t)isomp, M_ISOFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return root of a filesystem
|
|
*/
|
|
static int
|
|
cd9660_root(mp, vpp)
|
|
struct mount *mp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct iso_mnt *imp = VFSTOISOFS(mp);
|
|
struct iso_directory_record *dp =
|
|
(struct iso_directory_record *)imp->root;
|
|
ino_t ino = isodirino(dp, imp);
|
|
|
|
/*
|
|
* With RRIP we must use the `.' entry of the root directory.
|
|
* Simply tell vget, that it's a relocated directory.
|
|
*/
|
|
return (cd9660_vget_internal(mp, ino, LK_EXCLUSIVE, vpp,
|
|
imp->iso_ftype == ISO_FTYPE_RRIP, dp));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
static int
|
|
cd9660_statfs(mp, sbp, td)
|
|
struct mount *mp;
|
|
register struct statfs *sbp;
|
|
struct thread *td;
|
|
{
|
|
register struct iso_mnt *isomp;
|
|
|
|
isomp = VFSTOISOFS(mp);
|
|
|
|
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) {
|
|
sbp->f_type = mp->mnt_vfc->vfc_typenum;
|
|
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
|
|
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
static int
|
|
cd9660_fhtovp(mp, fhp, vpp)
|
|
register struct mount *mp;
|
|
struct fid *fhp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct ifid *ifhp = (struct ifid *)fhp;
|
|
register struct iso_node *ip;
|
|
struct vnode *nvp;
|
|
int error;
|
|
|
|
#ifdef ISOFS_DBG
|
|
printf("fhtovp: ino %d, start %ld\n",
|
|
ifhp->ifid_ino, ifhp->ifid_start);
|
|
#endif
|
|
|
|
if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
|
|
*vpp = NULLVP;
|
|
return (error);
|
|
}
|
|
ip = VTOI(nvp);
|
|
if (ip->inode.iso_mode == 0) {
|
|
vput(nvp);
|
|
*vpp = NULLVP;
|
|
return (ESTALE);
|
|
}
|
|
*vpp = nvp;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
cd9660_vget(mp, ino, flags, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
int flags;
|
|
struct vnode **vpp;
|
|
{
|
|
|
|
/*
|
|
* XXXX
|
|
* It would be nice if we didn't always set the `relocated' flag
|
|
* and force the extra read, but I don't want to think about fixing
|
|
* that right now.
|
|
*/
|
|
return (cd9660_vget_internal(mp, ino, flags, vpp,
|
|
#if 0
|
|
VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP,
|
|
#else
|
|
0,
|
|
#endif
|
|
(struct iso_directory_record *)0));
|
|
}
|
|
|
|
int
|
|
cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
int flags;
|
|
struct vnode **vpp;
|
|
int relocated;
|
|
struct iso_directory_record *isodir;
|
|
{
|
|
struct iso_mnt *imp;
|
|
struct iso_node *ip;
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
dev_t dev;
|
|
int error;
|
|
|
|
imp = VFSTOISOFS(mp);
|
|
dev = imp->im_dev;
|
|
if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0)
|
|
return (error);
|
|
if (*vpp != NULL)
|
|
return (0);
|
|
|
|
/* Allocate a new vnode/iso_node. */
|
|
if ((error = getnewvnode("isofs", mp, cd9660_vnodeop_p, &vp)) != 0) {
|
|
*vpp = NULLVP;
|
|
return (error);
|
|
}
|
|
MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE,
|
|
M_ZERO);
|
|
vp->v_data = ip;
|
|
ip->i_vnode = vp;
|
|
ip->i_dev = dev;
|
|
ip->i_number = ino;
|
|
|
|
/*
|
|
* Check to be sure that it did not show up. We have to put it
|
|
* on the hash chain as the cleanup from vput expects to find
|
|
* it there.
|
|
*/
|
|
if ((error = cd9660_ihashget(dev, ino, flags, vpp)) != 0 ||
|
|
*vpp != NULL) {
|
|
cd9660_ihashins(ip);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
cd9660_ihashins(ip);
|
|
|
|
if (isodir == 0) {
|
|
int lbn, off;
|
|
|
|
lbn = lblkno(imp, ino);
|
|
if (lbn >= imp->volume_space_size) {
|
|
vput(vp);
|
|
printf("fhtovp: lbn exceed volume space %d\n", lbn);
|
|
return (ESTALE);
|
|
}
|
|
|
|
off = blkoff(imp, ino);
|
|
if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) {
|
|
vput(vp);
|
|
printf("fhtovp: crosses block boundary %d\n",
|
|
off + ISO_DIRECTORY_RECORD_SIZE);
|
|
return (ESTALE);
|
|
}
|
|
|
|
error = bread(imp->im_devvp,
|
|
lbn << (imp->im_bshift - DEV_BSHIFT),
|
|
imp->logical_block_size, NOCRED, &bp);
|
|
if (error) {
|
|
vput(vp);
|
|
brelse(bp);
|
|
printf("fhtovp: bread error %d\n",error);
|
|
return (error);
|
|
}
|
|
isodir = (struct iso_directory_record *)(bp->b_data + off);
|
|
|
|
if (off + isonum_711(isodir->length) >
|
|
imp->logical_block_size) {
|
|
vput(vp);
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n",
|
|
off +isonum_711(isodir->length), off,
|
|
isonum_711(isodir->length));
|
|
return (ESTALE);
|
|
}
|
|
|
|
#if 0
|
|
if (isonum_733(isodir->extent) +
|
|
isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) {
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
printf("fhtovp: file start miss %d vs %d\n",
|
|
isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length),
|
|
ifhp->ifid_start);
|
|
return (ESTALE);
|
|
}
|
|
#endif
|
|
} else
|
|
bp = 0;
|
|
|
|
ip->i_mnt = imp;
|
|
ip->i_devvp = imp->im_devvp;
|
|
VREF(ip->i_devvp);
|
|
|
|
if (relocated) {
|
|
/*
|
|
* On relocated directories we must
|
|
* read the `.' entry out of a dir.
|
|
*/
|
|
ip->iso_start = ino >> imp->im_bshift;
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
isodir = (struct iso_directory_record *)bp->b_data;
|
|
}
|
|
|
|
ip->iso_extent = isonum_733(isodir->extent);
|
|
ip->i_size = isonum_733(isodir->size);
|
|
ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent;
|
|
|
|
/*
|
|
* Setup time stamp, attribute
|
|
*/
|
|
vp->v_type = VNON;
|
|
switch (imp->iso_ftype) {
|
|
default: /* ISO_FTYPE_9660 */
|
|
{
|
|
struct buf *bp2;
|
|
int off;
|
|
if ((imp->im_flags & ISOFSMNT_EXTATT)
|
|
&& (off = isonum_711(isodir->ext_attr_length)))
|
|
cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL,
|
|
&bp2);
|
|
else
|
|
bp2 = NULL;
|
|
cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660);
|
|
cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660);
|
|
if (bp2)
|
|
brelse(bp2);
|
|
break;
|
|
}
|
|
case ISO_FTYPE_RRIP:
|
|
cd9660_rrip_analyze(isodir, ip, imp);
|
|
break;
|
|
}
|
|
|
|
if (bp != 0)
|
|
brelse(bp);
|
|
|
|
/*
|
|
* Initialize the associated vnode
|
|
*/
|
|
switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
|
|
case VFIFO:
|
|
vp->v_op = cd9660_fifoop_p;
|
|
break;
|
|
case VCHR:
|
|
case VBLK:
|
|
vp->v_op = cd9660_specop_p;
|
|
vp = addaliasu(vp, ip->inode.iso_rdev);
|
|
ip->i_vnode = vp;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (ip->iso_extent == imp->root_extent)
|
|
vp->v_vflag |= VV_ROOT;
|
|
|
|
/*
|
|
* XXX need generation number?
|
|
*/
|
|
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Vnode pointer to File handle
|
|
*/
|
|
/* ARGSUSED */
|
|
static 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;
|
|
}
|