745 lines
18 KiB
C
745 lines
18 KiB
C
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/*-
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* Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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/* udf_vfsops.c */
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/* Implement the VFS side of things */
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/*
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* Ok, here's how it goes. The UDF specs are pretty clear on how each data
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* structure is made up, but not very clear on how they relate to each other.
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* Here is the skinny... This demostrates a filesystem with one file in the
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* root directory. Subdirectories are treated just as normal files, but they
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* have File Id Descriptors of their children as their file data. As for the
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* Anchor Volume Descriptor Pointer, it can exist in two of the following three
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* places: sector 256, sector n (the max sector of the disk), or sector
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* n - 256. It's a pretty good bet that one will exist at sector 256 though.
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* One caveat is unclosed CD media. For that, sector 256 cannot be written,
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* so the Anchor Volume Descriptor Pointer can exist at sector 512 until the
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* media is closed.
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*
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* Sector:
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* 256:
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* n: Anchor Volume Descriptor Pointer
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* n - 256: |
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* |
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* |-->Main Volume Descriptor Sequence
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* | |
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* | |
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* | |-->Logical Volume Descriptor
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* | |
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* |-->Partition Descriptor |
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* | |
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* | |
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* |-->Fileset Descriptor
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* |
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* |
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* |-->Root Dir File Entry
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* |
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* |
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* |-->File data:
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* File Id Descriptor
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* |
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* |
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* |-->File Entry
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* |
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* |
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* |-->File data
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/fcntl.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/conf.h>
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#include <sys/queue.h>
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#include <sys/dirent.h>
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#include <vm/uma.h>
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#include <fs/udf/ecma167-udf.h>
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#include <fs/udf/udf.h>
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#include <fs/udf/udf_mount.h>
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#include <fs/udf/osta.h>
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MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure");
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MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure");
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MALLOC_DEFINE(M_UDFSTABLE, "UDF s_table", "UDF sparing table");
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/* Zones */
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uma_zone_t udf_zone_trans = NULL;
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uma_zone_t udf_zone_node = NULL;
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static int udf_init(struct vfsconf *);
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static int udf_uninit(struct vfsconf *);
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static int udf_mount(struct mount *, char *, caddr_t, struct nameidata *,
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struct thread *);
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static int udf_unmount(struct mount *, int, struct thread *);
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static int udf_root(struct mount *, struct vnode **);
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static int udf_statfs(struct mount *, struct statfs *, struct thread *);
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static int udf_fhtovp(struct mount *, struct fid *, struct vnode **);
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static int udf_vptofh(struct vnode *, struct fid *);
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static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *);
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static struct vfsops udf_vfsops = {
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udf_mount,
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vfs_stdstart,
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udf_unmount,
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udf_root,
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vfs_stdquotactl,
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udf_statfs,
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vfs_stdsync,
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udf_vget,
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udf_fhtovp,
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vfs_stdcheckexp,
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udf_vptofh,
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udf_init,
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udf_uninit,
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vfs_stdextattrctl,
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};
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VFS_SET(udf_vfsops, udf, VFCF_READONLY);
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static int udf_mountfs(struct vnode *, struct mount *, struct thread *, struct udf_args *);
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static int
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udf_init(struct vfsconf *foo)
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{
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/*
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* This code used to pre-allocate a certain number of pages for each
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* pool, reducing the need to grow the zones later on. UMA doesn't
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* advertise any such functionality, unfortunately =-<
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*/
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udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN *
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sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0);
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udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node),
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NULL, NULL, NULL, NULL, 0, 0);
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if ((udf_zone_node == NULL) || (udf_zone_trans == NULL)) {
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printf("Cannot create allocation zones.\n");
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return (ENOMEM);
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}
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return 0;
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}
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static int
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udf_uninit(struct vfsconf *foo)
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{
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if (udf_zone_trans != NULL) {
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uma_zdestroy(udf_zone_trans);
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udf_zone_trans = NULL;
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}
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if (udf_zone_node != NULL) {
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uma_zdestroy(udf_zone_node);
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udf_zone_node = NULL;
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}
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return (0);
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}
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static int
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udf_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp, struct thread *td)
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{
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struct vnode *devvp; /* vnode of the mount device */
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struct udf_args args;
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struct udf_mnt *imp = 0;
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size_t size;
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int 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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* No root filesystem support. Probably not a big deal, since the
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* bootloader doesn't understand UDF.
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*/
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if (mp->mnt_flag & MNT_ROOTFS)
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return (ENOTSUP);
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if ((error = copyin(data, (caddr_t)&args, sizeof(struct udf_args))))
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return (error);
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if (mp->mnt_flag & MNT_UPDATE) {
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imp = VFSTOUDFFS(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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/* Check that the mount device exists */
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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) == 0) {
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vrele(devvp);
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return (error);
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}
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/* Check the access rights on the mount device */
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
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error = VOP_ACCESS(devvp, VREAD, 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 ((error = udf_mountfs(devvp, mp, td, &args))) {
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vrele(devvp);
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return (error);
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}
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imp = VFSTOUDFFS(mp);
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copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
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bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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udf_statfs(mp, &mp->mnt_stat, td);
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return 0;
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};
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/*
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* Check the descriptor tag for both the correct id and correct checksum.
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* Return zero if all is good, EINVAL if not.
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*/
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int
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udf_checktag(struct desc_tag *tag, u_int16_t id)
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{
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u_int8_t *itag;
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u_int8_t i, cksum = 0;
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itag = (u_int8_t *)tag;
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if (tag->id != id)
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return (EINVAL);
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for (i = 0; i < 15; i++)
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cksum = cksum + itag[i];
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cksum = cksum - itag[4];
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if (cksum == tag->cksum)
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return (0);
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return (EINVAL);
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}
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static int
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udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td, struct udf_args *argp) {
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struct buf *bp = NULL;
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struct anchor_vdp avdp;
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struct udf_mnt *udfmp = NULL;
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struct part_desc *pd;
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struct logvol_desc *lvd;
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struct fileset_desc *fsd;
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struct file_entry *root_fentry;
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u_int32_t sector, size, mvds_start, mvds_end;
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u_int32_t fsd_offset = 0;
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u_int16_t part_num = 0, fsd_part = 0;
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int error = EINVAL, needclose = 0;
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int logvol_found = 0, part_found = 0, fsd_found = 0;
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int bsize;
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/*
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* Disallow multiple mounts of the same device. Flush the buffer
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* cache for the device.
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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)
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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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needclose = 1;
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MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT,
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M_NOWAIT | M_ZERO);
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if (udfmp == NULL) {
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printf("Cannot allocate UDF mount struct\n");
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error = ENOMEM;
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goto bail;
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}
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mp->mnt_data = (qaddr_t)udfmp;
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mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev);
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mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
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mp->mnt_flag |= MNT_LOCAL;
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udfmp->im_mountp = mp;
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udfmp->im_dev = devvp->v_rdev;
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udfmp->im_devvp = devvp;
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bsize = 2048; /* XXX Should probe the media for it's size */
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/*
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* Get the Anchor Volume Descriptor Pointer from sector 256.
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* XXX Should also check sector n - 256, n, and 512.
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*/
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sector = 256;
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if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED,
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&bp)) != 0)
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goto bail;
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if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR)))
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goto bail;
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bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp));
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brelse(bp);
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bp = NULL;
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/*
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* Extract the Partition Descriptor and Logical Volume Descriptor
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* from the Volume Descriptor Sequence.
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* XXX Should we care about the partition type right now?
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* XXX What about multiple partitions?
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*/
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mvds_start = avdp.main_vds_ex.loc;
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mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize;
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for (sector = mvds_start; sector < mvds_end; sector++) {
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if ((error = bread(devvp, sector * btodb(bsize), bsize,
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NOCRED, &bp)) != 0) {
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printf("Can't read sector %d of VDS\n", sector);
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goto bail;
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}
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lvd = (struct logvol_desc *)bp->b_data;
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if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) {
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udfmp->bsize = lvd->lb_size;
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udfmp->bmask = udfmp->bsize - 1;
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udfmp->bshift = ffs(udfmp->bsize) - 1;
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fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num;
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fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num;
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if (udf_find_partmaps(udfmp, lvd))
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break;
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logvol_found = 1;
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}
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pd = (struct part_desc *)bp->b_data;
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if (!udf_checktag(&pd->tag, TAGID_PARTITION)) {
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part_found = 1;
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part_num = pd->part_num;
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udfmp->part_len = pd->part_len;
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udfmp->part_start = pd->start_loc;
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}
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brelse(bp);
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bp = NULL;
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if ((part_found) && (logvol_found))
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break;
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}
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if (!part_found || !logvol_found) {
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error = EINVAL;
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goto bail;
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}
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if (fsd_part != part_num) {
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printf("FSD does not lie within the partition!\n");
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error = EINVAL;
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goto bail;
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}
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/*
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* Grab the Fileset Descriptor
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* Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing
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* me in the right direction here.
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*/
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sector = udfmp->part_start + fsd_offset;
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if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
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printf("Cannot read sector %d of FSD\n", sector);
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goto bail;
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}
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fsd = (struct fileset_desc *)bp->b_data;
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if (!udf_checktag(&fsd->tag, TAGID_FSD)) {
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fsd_found = 1;
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bcopy(&fsd->rootdir_icb, &udfmp->root_icb,
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sizeof(struct long_ad));
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}
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brelse(bp);
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bp = NULL;
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if (!fsd_found) {
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printf("Couldn't find the fsd\n");
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error = EINVAL;
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goto bail;
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}
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|
/*
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|
* Find the file entry for the root directory.
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|
*/
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|
sector = udfmp->root_icb.loc.lb_num + udfmp->part_start;
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|
size = udfmp->root_icb.len;
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if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) {
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printf("Cannot read sector %d\n", sector);
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goto bail;
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}
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||
|
|
||
|
root_fentry = (struct file_entry *)bp->b_data;
|
||
|
if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) {
|
||
|
printf("Invalid root file entry!\n");
|
||
|
goto bail;
|
||
|
}
|
||
|
|
||
|
brelse(bp);
|
||
|
bp = NULL;
|
||
|
|
||
|
TAILQ_INIT(&udfmp->udf_tqh);
|
||
|
devvp->v_rdev->si_mountpoint = mp;
|
||
|
|
||
|
mtx_init(&udfmp->hash_mtx, "udf_hash", NULL, MTX_DEF);
|
||
|
return 0;
|
||
|
|
||
|
bail:
|
||
|
if (udfmp != NULL)
|
||
|
FREE(udfmp, M_UDFMOUNT);
|
||
|
if (bp != NULL)
|
||
|
brelse(bp);
|
||
|
if (needclose)
|
||
|
VOP_CLOSE(devvp, FREAD, NOCRED, td);
|
||
|
return error;
|
||
|
};
|
||
|
|
||
|
static int
|
||
|
udf_unmount(struct mount *mp, int mntflags, struct thread *td)
|
||
|
{
|
||
|
struct udf_mnt *udfmp;
|
||
|
int error, flags = 0;
|
||
|
|
||
|
udfmp = VFSTOUDFFS(mp);
|
||
|
|
||
|
if (mntflags & MNT_FORCE)
|
||
|
flags |= FORCECLOSE;
|
||
|
|
||
|
if ((error = vflush(mp, 0, flags)))
|
||
|
return (error);
|
||
|
|
||
|
udfmp->im_devvp->v_rdev->si_mountpoint = NULL;
|
||
|
error = VOP_CLOSE(udfmp->im_devvp, FREAD, NOCRED, td);
|
||
|
vrele(udfmp->im_devvp);
|
||
|
|
||
|
if (udfmp->s_table != NULL)
|
||
|
FREE(udfmp->s_table, M_UDFSTABLE);
|
||
|
FREE(udfmp, M_UDFMOUNT);
|
||
|
|
||
|
mp->mnt_data = (qaddr_t)0;
|
||
|
mp->mnt_flag &= ~MNT_LOCAL;
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
udf_root(struct mount *mp, struct vnode **vpp)
|
||
|
{
|
||
|
struct udf_mnt *udfmp;
|
||
|
struct vnode *vp;
|
||
|
ino_t id;
|
||
|
int error;
|
||
|
|
||
|
udfmp = VFSTOUDFFS(mp);
|
||
|
|
||
|
id = udf_getid(&udfmp->root_icb);
|
||
|
|
||
|
error = udf_vget(mp, id, LK_EXCLUSIVE, vpp);
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
vp = *vpp;
|
||
|
vp->v_flag |= VROOT;
|
||
|
udfmp->root_vp = vp;
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
|
||
|
{
|
||
|
struct udf_mnt *udfmp;
|
||
|
|
||
|
udfmp = VFSTOUDFFS(mp);
|
||
|
|
||
|
sbp->f_bsize = udfmp->bsize;
|
||
|
sbp->f_iosize = udfmp->bsize;
|
||
|
sbp->f_blocks = udfmp->part_len;
|
||
|
sbp->f_bfree = 0;
|
||
|
sbp->f_bavail = 0;
|
||
|
sbp->f_files = 0;
|
||
|
sbp->f_ffree = 0;
|
||
|
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;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
|
||
|
{
|
||
|
struct buf *bp;
|
||
|
struct vnode *devvp;
|
||
|
struct udf_mnt *udfmp;
|
||
|
struct thread *td;
|
||
|
struct vnode *vp;
|
||
|
struct udf_node *unode;
|
||
|
struct file_entry *fe;
|
||
|
int error, sector, size;
|
||
|
|
||
|
td = curthread;
|
||
|
udfmp = VFSTOUDFFS(mp);
|
||
|
|
||
|
/* See if we already have this in the cache */
|
||
|
if ((error = udf_hashlookup(udfmp, ino, flags, vpp)) != 0)
|
||
|
return (error);
|
||
|
if (*vpp != NULL) {
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Allocate memory and check the tag id's before grabbing a new
|
||
|
* vnode, since it's hard to roll back if there is a problem.
|
||
|
*/
|
||
|
unode = uma_zalloc(udf_zone_node, M_WAITOK);
|
||
|
if (unode == NULL) {
|
||
|
printf("Cannot allocate udf node\n");
|
||
|
return (ENOMEM);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Copy in the file entry. Per the spec, the size can only be 1 block.
|
||
|
*/
|
||
|
sector = ino + udfmp->part_start;
|
||
|
devvp = udfmp->im_devvp;
|
||
|
if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
|
||
|
printf("Cannot read sector %d\n", sector);
|
||
|
uma_zfree(udf_zone_node, unode);
|
||
|
return (error);
|
||
|
}
|
||
|
|
||
|
fe = (struct file_entry *)bp->b_data;
|
||
|
if (udf_checktag(&fe->tag, TAGID_FENTRY)) {
|
||
|
printf("Invalid file entry!\n");
|
||
|
uma_zfree(udf_zone_node, unode);
|
||
|
brelse(bp);
|
||
|
return (ENOMEM);
|
||
|
}
|
||
|
size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad;
|
||
|
MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY,
|
||
|
M_NOWAIT | M_ZERO);
|
||
|
if (unode->fentry == NULL) {
|
||
|
printf("Cannot allocate file entry block\n");
|
||
|
uma_zfree(udf_zone_node, unode);
|
||
|
brelse(bp);
|
||
|
return (ENOMEM);
|
||
|
}
|
||
|
|
||
|
bcopy(bp->b_data, unode->fentry, size);
|
||
|
|
||
|
brelse(bp);
|
||
|
bp = NULL;
|
||
|
|
||
|
if ((error = udf_allocv(mp, &vp, td))) {
|
||
|
printf("Error from udf_allocv\n");
|
||
|
uma_zfree(udf_zone_node, unode);
|
||
|
return (error);
|
||
|
}
|
||
|
|
||
|
unode->i_vnode = vp;
|
||
|
unode->hash_id = ino;
|
||
|
unode->i_devvp = udfmp->im_devvp;
|
||
|
unode->i_dev = udfmp->im_dev;
|
||
|
unode->udfmp = udfmp;
|
||
|
vp->v_data = unode;
|
||
|
lockinit(&vp->v_lock, PINOD, "udfnode", 0, 0);
|
||
|
vp->v_vnlock = &vp->v_lock;
|
||
|
VREF(udfmp->im_devvp);
|
||
|
udf_hashins(unode);
|
||
|
|
||
|
switch (unode->fentry->icbtag.file_type) {
|
||
|
default:
|
||
|
vp->v_type = VBAD;
|
||
|
break;
|
||
|
case 4:
|
||
|
vp->v_type = VDIR;
|
||
|
break;
|
||
|
case 5:
|
||
|
vp->v_type = VREG;
|
||
|
break;
|
||
|
case 6:
|
||
|
vp->v_type = VBLK;
|
||
|
break;
|
||
|
case 7:
|
||
|
vp->v_type = VCHR;
|
||
|
break;
|
||
|
case 9:
|
||
|
vp->v_type = VFIFO;
|
||
|
break;
|
||
|
case 10:
|
||
|
vp->v_type = VSOCK;
|
||
|
break;
|
||
|
case 12:
|
||
|
vp->v_type = VLNK;
|
||
|
break;
|
||
|
}
|
||
|
*vpp = vp;
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
struct ifid {
|
||
|
ushort ifid_len;
|
||
|
ushort ifid_pad;
|
||
|
int ifid_ino;
|
||
|
long ifid_start;
|
||
|
};
|
||
|
|
||
|
static int
|
||
|
udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
|
||
|
{
|
||
|
struct ifid *ifhp;
|
||
|
struct vnode *nvp;
|
||
|
int error;
|
||
|
|
||
|
ifhp = (struct ifid *)fhp;
|
||
|
|
||
|
if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
|
||
|
*vpp = NULLVP;
|
||
|
return (error);
|
||
|
}
|
||
|
|
||
|
*vpp = nvp;
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
udf_vptofh (struct vnode *vp, struct fid *fhp)
|
||
|
{
|
||
|
struct udf_node *node;
|
||
|
struct ifid *ifhp;
|
||
|
|
||
|
node = VTON(vp);
|
||
|
ifhp = (struct ifid *)fhp;
|
||
|
ifhp->ifid_len = sizeof(struct ifid);
|
||
|
ifhp->ifid_ino = node->hash_id;
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd)
|
||
|
{
|
||
|
union udf_pmap *pmap;
|
||
|
struct part_map_spare *pms;
|
||
|
struct regid *pmap_id;
|
||
|
struct buf *bp;
|
||
|
unsigned char regid_id[UDF_REGID_ID_SIZE + 1];
|
||
|
int i, ptype, psize, error;
|
||
|
|
||
|
for (i = 0; i < lvd->n_pm; i++) {
|
||
|
pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE];
|
||
|
ptype = pmap->data[0];
|
||
|
psize = pmap->data[1];
|
||
|
if (((ptype != 1) && (ptype != 2)) ||
|
||
|
((psize != UDF_PMAP_SIZE) && (psize != 6))) {
|
||
|
printf("Invalid partition map found\n");
|
||
|
return (1);
|
||
|
}
|
||
|
|
||
|
if (ptype == 1) {
|
||
|
/* Type 1 map. We don't care */
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
/* Type 2 map. Gotta find out the details */
|
||
|
pmap_id = (struct regid *)&pmap->data[4];
|
||
|
bzero(®id_id[0], UDF_REGID_ID_SIZE);
|
||
|
bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE);
|
||
|
|
||
|
if (bcmp(®id_id[0], "*UDF Sparable Partition",
|
||
|
UDF_REGID_ID_SIZE)) {
|
||
|
printf("Unsupported partition map: %s\n", ®id_id[0]);
|
||
|
return (1);
|
||
|
}
|
||
|
|
||
|
pms = &pmap->pms;
|
||
|
MALLOC(udfmp->s_table, struct udf_sparing_table *, pms->st_size,
|
||
|
M_UDFSTABLE, M_NOWAIT | M_ZERO);
|
||
|
if (udfmp->s_table == NULL)
|
||
|
return (ENOMEM);
|
||
|
|
||
|
/* Calculate the number of sectors per packet. */
|
||
|
/* XXX Logical or physical? */
|
||
|
udfmp->p_sectors = pms->packet_len / udfmp->bsize;
|
||
|
|
||
|
/*
|
||
|
* XXX If reading the first Sparing Table fails, should look
|
||
|
* for another table.
|
||
|
*/
|
||
|
if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size,
|
||
|
&bp)) != 0) {
|
||
|
printf("Failed to read Sparing Table at sector %d\n",
|
||
|
pms->st_loc[0]);
|
||
|
return (error);
|
||
|
}
|
||
|
bcopy(bp->b_data, udfmp->s_table, pms->st_size);
|
||
|
brelse(bp);
|
||
|
|
||
|
if (udf_checktag(&udfmp->s_table->tag, 0)) {
|
||
|
printf("Invalid sparing table found\n");
|
||
|
return (EINVAL);
|
||
|
}
|
||
|
|
||
|
/* See how many valid entries there are here. The list is
|
||
|
* supposed to be sorted. 0xfffffff0 and higher are not valid
|
||
|
*/
|
||
|
for (i = 0; i < udfmp->s_table->rt_l; i++) {
|
||
|
udfmp->s_table_entries = i;
|
||
|
if (udfmp->s_table->entries[i].org >= 0xfffffff0)
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return (0);
|
||
|
}
|