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62 |
marcus.erl |
/*
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* super.c
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*
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* PURPOSE
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* Super block routines for the OSTA-UDF(tm) filesystem.
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*
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* DESCRIPTION
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* OSTA-UDF(tm) = Optical Storage Technology Association
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* Universal Disk Format.
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*
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* This code is based on version 2.00 of the UDF specification,
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* and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
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* http://www.osta.org/
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* http://www.ecma.ch/
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* http://www.iso.org/
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*
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* COPYRIGHT
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* This file is distributed under the terms of the GNU General Public
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* License (GPL). Copies of the GPL can be obtained from:
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* ftp://prep.ai.mit.edu/pub/gnu/GPL
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* Each contributing author retains all rights to their own work.
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*
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* (C) 1998 Dave Boynton
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* (C) 1998-2004 Ben Fennema
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* (C) 2000 Stelias Computing Inc
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*
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* HISTORY
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*
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* 09/24/98 dgb changed to allow compiling outside of kernel, and
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* added some debugging.
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* 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
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* 10/16/98 attempting some multi-session support
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* 10/17/98 added freespace count for "df"
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* 11/11/98 gr added novrs option
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* 11/26/98 dgb added fileset,anchor mount options
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* 12/06/98 blf really hosed things royally. vat/sparing support. sequenced vol descs
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* rewrote option handling based on isofs
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* 12/20/98 find the free space bitmap (if it exists)
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*/
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#include "udfdecl.h"
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#include <linux/blkdev.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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| 47 |
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#include <linux/parser.h>
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| 48 |
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#include <linux/stat.h>
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#include <linux/cdrom.h>
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#include <linux/nls.h>
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#include <linux/smp_lock.h>
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#include <linux/buffer_head.h>
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#include <linux/vfs.h>
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#include <linux/vmalloc.h>
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#include <asm/byteorder.h>
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#include <linux/udf_fs.h>
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#include "udf_sb.h"
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#include "udf_i.h"
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#include <linux/init.h>
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| 62 |
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#include <asm/uaccess.h>
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| 64 |
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#define VDS_POS_PRIMARY_VOL_DESC 0
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| 65 |
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#define VDS_POS_UNALLOC_SPACE_DESC 1
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#define VDS_POS_LOGICAL_VOL_DESC 2
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| 67 |
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#define VDS_POS_PARTITION_DESC 3
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| 68 |
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#define VDS_POS_IMP_USE_VOL_DESC 4
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| 69 |
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#define VDS_POS_VOL_DESC_PTR 5
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#define VDS_POS_TERMINATING_DESC 6
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#define VDS_POS_LENGTH 7
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| 73 |
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static char error_buf[1024];
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/* These are the "meat" - everything else is stuffing */
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static int udf_fill_super(struct super_block *, void *, int);
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static void udf_put_super(struct super_block *);
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static void udf_write_super(struct super_block *);
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| 79 |
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static int udf_remount_fs(struct super_block *, int *, char *);
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static int udf_check_valid(struct super_block *, int, int);
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static int udf_vrs(struct super_block *sb, int silent);
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| 82 |
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static int udf_load_partition(struct super_block *, kernel_lb_addr *);
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| 83 |
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static int udf_load_logicalvol(struct super_block *, struct buffer_head *,
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| 84 |
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kernel_lb_addr *);
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static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
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static void udf_find_anchor(struct super_block *);
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static int udf_find_fileset(struct super_block *, kernel_lb_addr *,
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| 88 |
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kernel_lb_addr *);
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static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
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| 90 |
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static void udf_load_fileset(struct super_block *, struct buffer_head *,
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| 91 |
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kernel_lb_addr *);
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static int udf_load_partdesc(struct super_block *, struct buffer_head *);
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static void udf_open_lvid(struct super_block *);
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static void udf_close_lvid(struct super_block *);
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| 95 |
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static unsigned int udf_count_free(struct super_block *);
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static int udf_statfs(struct dentry *, struct kstatfs *);
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| 98 |
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/* UDF filesystem type */
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static int udf_get_sb(struct file_system_type *fs_type,
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int flags, const char *dev_name, void *data,
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struct vfsmount *mnt)
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| 102 |
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{
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| 103 |
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return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
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| 104 |
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}
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static struct file_system_type udf_fstype = {
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.owner = THIS_MODULE,
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.name = "udf",
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.get_sb = udf_get_sb,
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.kill_sb = kill_block_super,
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.fs_flags = FS_REQUIRES_DEV,
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};
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| 114 |
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static struct kmem_cache *udf_inode_cachep;
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| 116 |
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static struct inode *udf_alloc_inode(struct super_block *sb)
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{
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struct udf_inode_info *ei;
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ei = (struct udf_inode_info *)kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
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| 120 |
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if (!ei)
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| 121 |
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return NULL;
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| 122 |
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| 123 |
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ei->i_unique = 0;
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ei->i_lenExtents = 0;
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ei->i_next_alloc_block = 0;
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ei->i_next_alloc_goal = 0;
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ei->i_strat4096 = 0;
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| 128 |
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| 129 |
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return &ei->vfs_inode;
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}
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| 132 |
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static void udf_destroy_inode(struct inode *inode)
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{
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kmem_cache_free(udf_inode_cachep, UDF_I(inode));
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}
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static void init_once(struct kmem_cache *cachep, void *foo)
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| 138 |
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{
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struct udf_inode_info *ei = (struct udf_inode_info *)foo;
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ei->i_ext.i_data = NULL;
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inode_init_once(&ei->vfs_inode);
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}
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| 144 |
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| 145 |
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static int init_inodecache(void)
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{
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udf_inode_cachep = kmem_cache_create("udf_inode_cache",
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sizeof(struct udf_inode_info),
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0, (SLAB_RECLAIM_ACCOUNT |
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SLAB_MEM_SPREAD),
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init_once);
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| 152 |
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if (!udf_inode_cachep)
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return -ENOMEM;
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return 0;
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}
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| 157 |
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static void destroy_inodecache(void)
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{
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kmem_cache_destroy(udf_inode_cachep);
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}
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| 162 |
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/* Superblock operations */
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static const struct super_operations udf_sb_ops = {
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.alloc_inode = udf_alloc_inode,
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.destroy_inode = udf_destroy_inode,
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.write_inode = udf_write_inode,
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.delete_inode = udf_delete_inode,
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.clear_inode = udf_clear_inode,
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.put_super = udf_put_super,
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.write_super = udf_write_super,
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.statfs = udf_statfs,
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.remount_fs = udf_remount_fs,
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};
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| 175 |
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struct udf_options {
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unsigned char novrs;
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unsigned int blocksize;
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| 178 |
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unsigned int session;
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| 179 |
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unsigned int lastblock;
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| 180 |
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unsigned int anchor;
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| 181 |
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unsigned int volume;
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| 182 |
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unsigned short partition;
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| 183 |
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unsigned int fileset;
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| 184 |
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unsigned int rootdir;
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| 185 |
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unsigned int flags;
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| 186 |
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mode_t umask;
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| 187 |
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gid_t gid;
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| 188 |
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uid_t uid;
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| 189 |
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struct nls_table *nls_map;
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| 190 |
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};
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| 191 |
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| 192 |
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static int __init init_udf_fs(void)
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| 193 |
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{
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| 194 |
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int err;
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| 195 |
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| 196 |
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err = init_inodecache();
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| 197 |
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if (err)
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| 198 |
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goto out1;
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| 199 |
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err = register_filesystem(&udf_fstype);
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| 200 |
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if (err)
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| 201 |
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goto out;
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| 202 |
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| 203 |
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return 0;
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| 204 |
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| 205 |
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out:
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| 206 |
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destroy_inodecache();
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| 207 |
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| 208 |
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out1:
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| 209 |
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return err;
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| 210 |
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}
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| 211 |
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| 212 |
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static void __exit exit_udf_fs(void)
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| 213 |
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{
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| 214 |
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unregister_filesystem(&udf_fstype);
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| 215 |
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destroy_inodecache();
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| 216 |
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}
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| 217 |
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| 218 |
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module_init(init_udf_fs)
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module_exit(exit_udf_fs)
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| 221 |
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/*
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| 222 |
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* udf_parse_options
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| 223 |
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*
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| 224 |
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* PURPOSE
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| 225 |
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* Parse mount options.
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| 226 |
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*
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| 227 |
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* DESCRIPTION
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| 228 |
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* The following mount options are supported:
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| 229 |
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*
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| 230 |
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* gid= Set the default group.
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| 231 |
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* umask= Set the default umask.
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| 232 |
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* uid= Set the default user.
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| 233 |
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* bs= Set the block size.
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| 234 |
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* unhide Show otherwise hidden files.
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| 235 |
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* undelete Show deleted files in lists.
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| 236 |
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* adinicb Embed data in the inode (default)
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| 237 |
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* noadinicb Don't embed data in the inode
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| 238 |
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* shortad Use short ad's
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| 239 |
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* longad Use long ad's (default)
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| 240 |
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* nostrict Unset strict conformance
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| 241 |
|
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* iocharset= Set the NLS character set
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| 242 |
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*
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| 243 |
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* The remaining are for debugging and disaster recovery:
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| 244 |
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*
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| 245 |
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* novrs Skip volume sequence recognition
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| 246 |
|
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*
|
| 247 |
|
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* The following expect a offset from 0.
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| 248 |
|
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*
|
| 249 |
|
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* session= Set the CDROM session (default= last session)
|
| 250 |
|
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* anchor= Override standard anchor location. (default= 256)
|
| 251 |
|
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* volume= Override the VolumeDesc location. (unused)
|
| 252 |
|
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* partition= Override the PartitionDesc location. (unused)
|
| 253 |
|
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* lastblock= Set the last block of the filesystem/
|
| 254 |
|
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*
|
| 255 |
|
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* The following expect a offset from the partition root.
|
| 256 |
|
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*
|
| 257 |
|
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* fileset= Override the fileset block location. (unused)
|
| 258 |
|
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* rootdir= Override the root directory location. (unused)
|
| 259 |
|
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* WARNING: overriding the rootdir to a non-directory may
|
| 260 |
|
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* yield highly unpredictable results.
|
| 261 |
|
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*
|
| 262 |
|
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* PRE-CONDITIONS
|
| 263 |
|
|
* options Pointer to mount options string.
|
| 264 |
|
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* uopts Pointer to mount options variable.
|
| 265 |
|
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*
|
| 266 |
|
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* POST-CONDITIONS
|
| 267 |
|
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* <return> 1 Mount options parsed okay.
|
| 268 |
|
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* <return> 0 Error parsing mount options.
|
| 269 |
|
|
*
|
| 270 |
|
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* HISTORY
|
| 271 |
|
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* July 1, 1997 - Andrew E. Mileski
|
| 272 |
|
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* Written, tested, and released.
|
| 273 |
|
|
*/
|
| 274 |
|
|
|
| 275 |
|
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enum {
|
| 276 |
|
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Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
|
| 277 |
|
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Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
|
| 278 |
|
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Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
|
| 279 |
|
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Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
|
| 280 |
|
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Opt_rootdir, Opt_utf8, Opt_iocharset,
|
| 281 |
|
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Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
|
| 282 |
|
|
};
|
| 283 |
|
|
|
| 284 |
|
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static match_table_t tokens = {
|
| 285 |
|
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{Opt_novrs, "novrs"},
|
| 286 |
|
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{Opt_nostrict, "nostrict"},
|
| 287 |
|
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{Opt_bs, "bs=%u"},
|
| 288 |
|
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{Opt_unhide, "unhide"},
|
| 289 |
|
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{Opt_undelete, "undelete"},
|
| 290 |
|
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{Opt_noadinicb, "noadinicb"},
|
| 291 |
|
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{Opt_adinicb, "adinicb"},
|
| 292 |
|
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{Opt_shortad, "shortad"},
|
| 293 |
|
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{Opt_longad, "longad"},
|
| 294 |
|
|
{Opt_uforget, "uid=forget"},
|
| 295 |
|
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{Opt_uignore, "uid=ignore"},
|
| 296 |
|
|
{Opt_gforget, "gid=forget"},
|
| 297 |
|
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{Opt_gignore, "gid=ignore"},
|
| 298 |
|
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{Opt_gid, "gid=%u"},
|
| 299 |
|
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{Opt_uid, "uid=%u"},
|
| 300 |
|
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{Opt_umask, "umask=%o"},
|
| 301 |
|
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{Opt_session, "session=%u"},
|
| 302 |
|
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{Opt_lastblock, "lastblock=%u"},
|
| 303 |
|
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{Opt_anchor, "anchor=%u"},
|
| 304 |
|
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{Opt_volume, "volume=%u"},
|
| 305 |
|
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{Opt_partition, "partition=%u"},
|
| 306 |
|
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{Opt_fileset, "fileset=%u"},
|
| 307 |
|
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{Opt_rootdir, "rootdir=%u"},
|
| 308 |
|
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{Opt_utf8, "utf8"},
|
| 309 |
|
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{Opt_iocharset, "iocharset=%s"},
|
| 310 |
|
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{Opt_err, NULL}
|
| 311 |
|
|
};
|
| 312 |
|
|
|
| 313 |
|
|
static int udf_parse_options(char *options, struct udf_options *uopt)
|
| 314 |
|
|
{
|
| 315 |
|
|
char *p;
|
| 316 |
|
|
int option;
|
| 317 |
|
|
|
| 318 |
|
|
uopt->novrs = 0;
|
| 319 |
|
|
uopt->blocksize = 2048;
|
| 320 |
|
|
uopt->partition = 0xFFFF;
|
| 321 |
|
|
uopt->session = 0xFFFFFFFF;
|
| 322 |
|
|
uopt->lastblock = 0;
|
| 323 |
|
|
uopt->anchor = 0;
|
| 324 |
|
|
uopt->volume = 0xFFFFFFFF;
|
| 325 |
|
|
uopt->rootdir = 0xFFFFFFFF;
|
| 326 |
|
|
uopt->fileset = 0xFFFFFFFF;
|
| 327 |
|
|
uopt->nls_map = NULL;
|
| 328 |
|
|
|
| 329 |
|
|
if (!options)
|
| 330 |
|
|
return 1;
|
| 331 |
|
|
|
| 332 |
|
|
while ((p = strsep(&options, ",")) != NULL) {
|
| 333 |
|
|
substring_t args[MAX_OPT_ARGS];
|
| 334 |
|
|
int token;
|
| 335 |
|
|
if (!*p)
|
| 336 |
|
|
continue;
|
| 337 |
|
|
|
| 338 |
|
|
token = match_token(p, tokens, args);
|
| 339 |
|
|
switch (token) {
|
| 340 |
|
|
case Opt_novrs:
|
| 341 |
|
|
uopt->novrs = 1;
|
| 342 |
|
|
case Opt_bs:
|
| 343 |
|
|
if (match_int(&args[0], &option))
|
| 344 |
|
|
return 0;
|
| 345 |
|
|
uopt->blocksize = option;
|
| 346 |
|
|
break;
|
| 347 |
|
|
case Opt_unhide:
|
| 348 |
|
|
uopt->flags |= (1 << UDF_FLAG_UNHIDE);
|
| 349 |
|
|
break;
|
| 350 |
|
|
case Opt_undelete:
|
| 351 |
|
|
uopt->flags |= (1 << UDF_FLAG_UNDELETE);
|
| 352 |
|
|
break;
|
| 353 |
|
|
case Opt_noadinicb:
|
| 354 |
|
|
uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
|
| 355 |
|
|
break;
|
| 356 |
|
|
case Opt_adinicb:
|
| 357 |
|
|
uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
|
| 358 |
|
|
break;
|
| 359 |
|
|
case Opt_shortad:
|
| 360 |
|
|
uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
|
| 361 |
|
|
break;
|
| 362 |
|
|
case Opt_longad:
|
| 363 |
|
|
uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
|
| 364 |
|
|
break;
|
| 365 |
|
|
case Opt_gid:
|
| 366 |
|
|
if (match_int(args, &option))
|
| 367 |
|
|
return 0;
|
| 368 |
|
|
uopt->gid = option;
|
| 369 |
|
|
uopt->flags |= (1 << UDF_FLAG_GID_SET);
|
| 370 |
|
|
break;
|
| 371 |
|
|
case Opt_uid:
|
| 372 |
|
|
if (match_int(args, &option))
|
| 373 |
|
|
return 0;
|
| 374 |
|
|
uopt->uid = option;
|
| 375 |
|
|
uopt->flags |= (1 << UDF_FLAG_UID_SET);
|
| 376 |
|
|
break;
|
| 377 |
|
|
case Opt_umask:
|
| 378 |
|
|
if (match_octal(args, &option))
|
| 379 |
|
|
return 0;
|
| 380 |
|
|
uopt->umask = option;
|
| 381 |
|
|
break;
|
| 382 |
|
|
case Opt_nostrict:
|
| 383 |
|
|
uopt->flags &= ~(1 << UDF_FLAG_STRICT);
|
| 384 |
|
|
break;
|
| 385 |
|
|
case Opt_session:
|
| 386 |
|
|
if (match_int(args, &option))
|
| 387 |
|
|
return 0;
|
| 388 |
|
|
uopt->session = option;
|
| 389 |
|
|
break;
|
| 390 |
|
|
case Opt_lastblock:
|
| 391 |
|
|
if (match_int(args, &option))
|
| 392 |
|
|
return 0;
|
| 393 |
|
|
uopt->lastblock = option;
|
| 394 |
|
|
break;
|
| 395 |
|
|
case Opt_anchor:
|
| 396 |
|
|
if (match_int(args, &option))
|
| 397 |
|
|
return 0;
|
| 398 |
|
|
uopt->anchor = option;
|
| 399 |
|
|
break;
|
| 400 |
|
|
case Opt_volume:
|
| 401 |
|
|
if (match_int(args, &option))
|
| 402 |
|
|
return 0;
|
| 403 |
|
|
uopt->volume = option;
|
| 404 |
|
|
break;
|
| 405 |
|
|
case Opt_partition:
|
| 406 |
|
|
if (match_int(args, &option))
|
| 407 |
|
|
return 0;
|
| 408 |
|
|
uopt->partition = option;
|
| 409 |
|
|
break;
|
| 410 |
|
|
case Opt_fileset:
|
| 411 |
|
|
if (match_int(args, &option))
|
| 412 |
|
|
return 0;
|
| 413 |
|
|
uopt->fileset = option;
|
| 414 |
|
|
break;
|
| 415 |
|
|
case Opt_rootdir:
|
| 416 |
|
|
if (match_int(args, &option))
|
| 417 |
|
|
return 0;
|
| 418 |
|
|
uopt->rootdir = option;
|
| 419 |
|
|
break;
|
| 420 |
|
|
case Opt_utf8:
|
| 421 |
|
|
uopt->flags |= (1 << UDF_FLAG_UTF8);
|
| 422 |
|
|
break;
|
| 423 |
|
|
#ifdef CONFIG_UDF_NLS
|
| 424 |
|
|
case Opt_iocharset:
|
| 425 |
|
|
uopt->nls_map = load_nls(args[0].from);
|
| 426 |
|
|
uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
|
| 427 |
|
|
break;
|
| 428 |
|
|
#endif
|
| 429 |
|
|
case Opt_uignore:
|
| 430 |
|
|
uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
|
| 431 |
|
|
break;
|
| 432 |
|
|
case Opt_uforget:
|
| 433 |
|
|
uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
|
| 434 |
|
|
break;
|
| 435 |
|
|
case Opt_gignore:
|
| 436 |
|
|
uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
|
| 437 |
|
|
break;
|
| 438 |
|
|
case Opt_gforget:
|
| 439 |
|
|
uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
|
| 440 |
|
|
break;
|
| 441 |
|
|
default:
|
| 442 |
|
|
printk(KERN_ERR "udf: bad mount option \"%s\" "
|
| 443 |
|
|
"or missing value\n", p);
|
| 444 |
|
|
return 0;
|
| 445 |
|
|
}
|
| 446 |
|
|
}
|
| 447 |
|
|
return 1;
|
| 448 |
|
|
}
|
| 449 |
|
|
|
| 450 |
|
|
void udf_write_super(struct super_block *sb)
|
| 451 |
|
|
{
|
| 452 |
|
|
lock_kernel();
|
| 453 |
|
|
|
| 454 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
| 455 |
|
|
udf_open_lvid(sb);
|
| 456 |
|
|
sb->s_dirt = 0;
|
| 457 |
|
|
|
| 458 |
|
|
unlock_kernel();
|
| 459 |
|
|
}
|
| 460 |
|
|
|
| 461 |
|
|
static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
|
| 462 |
|
|
{
|
| 463 |
|
|
struct udf_options uopt;
|
| 464 |
|
|
|
| 465 |
|
|
uopt.flags = UDF_SB(sb)->s_flags;
|
| 466 |
|
|
uopt.uid = UDF_SB(sb)->s_uid;
|
| 467 |
|
|
uopt.gid = UDF_SB(sb)->s_gid;
|
| 468 |
|
|
uopt.umask = UDF_SB(sb)->s_umask;
|
| 469 |
|
|
|
| 470 |
|
|
if (!udf_parse_options(options, &uopt))
|
| 471 |
|
|
return -EINVAL;
|
| 472 |
|
|
|
| 473 |
|
|
UDF_SB(sb)->s_flags = uopt.flags;
|
| 474 |
|
|
UDF_SB(sb)->s_uid = uopt.uid;
|
| 475 |
|
|
UDF_SB(sb)->s_gid = uopt.gid;
|
| 476 |
|
|
UDF_SB(sb)->s_umask = uopt.umask;
|
| 477 |
|
|
|
| 478 |
|
|
if (UDF_SB_LVIDBH(sb)) {
|
| 479 |
|
|
int write_rev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev);
|
| 480 |
|
|
if (write_rev > UDF_MAX_WRITE_VERSION)
|
| 481 |
|
|
*flags |= MS_RDONLY;
|
| 482 |
|
|
}
|
| 483 |
|
|
|
| 484 |
|
|
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
|
| 485 |
|
|
return 0;
|
| 486 |
|
|
if (*flags & MS_RDONLY)
|
| 487 |
|
|
udf_close_lvid(sb);
|
| 488 |
|
|
else
|
| 489 |
|
|
udf_open_lvid(sb);
|
| 490 |
|
|
|
| 491 |
|
|
return 0;
|
| 492 |
|
|
}
|
| 493 |
|
|
|
| 494 |
|
|
/*
|
| 495 |
|
|
* udf_set_blocksize
|
| 496 |
|
|
*
|
| 497 |
|
|
* PURPOSE
|
| 498 |
|
|
* Set the block size to be used in all transfers.
|
| 499 |
|
|
*
|
| 500 |
|
|
* DESCRIPTION
|
| 501 |
|
|
* To allow room for a DMA transfer, it is best to guess big when unsure.
|
| 502 |
|
|
* This routine picks 2048 bytes as the blocksize when guessing. This
|
| 503 |
|
|
* should be adequate until devices with larger block sizes become common.
|
| 504 |
|
|
*
|
| 505 |
|
|
* Note that the Linux kernel can currently only deal with blocksizes of
|
| 506 |
|
|
* 512, 1024, 2048, 4096, and 8192 bytes.
|
| 507 |
|
|
*
|
| 508 |
|
|
* PRE-CONDITIONS
|
| 509 |
|
|
* sb Pointer to _locked_ superblock.
|
| 510 |
|
|
*
|
| 511 |
|
|
* POST-CONDITIONS
|
| 512 |
|
|
* sb->s_blocksize Blocksize.
|
| 513 |
|
|
* sb->s_blocksize_bits log2 of blocksize.
|
| 514 |
|
|
* <return> 0 Blocksize is valid.
|
| 515 |
|
|
* <return> 1 Blocksize is invalid.
|
| 516 |
|
|
*
|
| 517 |
|
|
* HISTORY
|
| 518 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 519 |
|
|
* Written, tested, and released.
|
| 520 |
|
|
*/
|
| 521 |
|
|
static int udf_set_blocksize(struct super_block *sb, int bsize)
|
| 522 |
|
|
{
|
| 523 |
|
|
if (!sb_min_blocksize(sb, bsize)) {
|
| 524 |
|
|
udf_debug("Bad block size (%d)\n", bsize);
|
| 525 |
|
|
printk(KERN_ERR "udf: bad block size (%d)\n", bsize);
|
| 526 |
|
|
return 0;
|
| 527 |
|
|
}
|
| 528 |
|
|
|
| 529 |
|
|
return sb->s_blocksize;
|
| 530 |
|
|
}
|
| 531 |
|
|
|
| 532 |
|
|
static int udf_vrs(struct super_block *sb, int silent)
|
| 533 |
|
|
{
|
| 534 |
|
|
struct volStructDesc *vsd = NULL;
|
| 535 |
|
|
int sector = 32768;
|
| 536 |
|
|
int sectorsize;
|
| 537 |
|
|
struct buffer_head *bh = NULL;
|
| 538 |
|
|
int iso9660 = 0;
|
| 539 |
|
|
int nsr02 = 0;
|
| 540 |
|
|
int nsr03 = 0;
|
| 541 |
|
|
|
| 542 |
|
|
/* Block size must be a multiple of 512 */
|
| 543 |
|
|
if (sb->s_blocksize & 511)
|
| 544 |
|
|
return 0;
|
| 545 |
|
|
|
| 546 |
|
|
if (sb->s_blocksize < sizeof(struct volStructDesc))
|
| 547 |
|
|
sectorsize = sizeof(struct volStructDesc);
|
| 548 |
|
|
else
|
| 549 |
|
|
sectorsize = sb->s_blocksize;
|
| 550 |
|
|
|
| 551 |
|
|
sector += (UDF_SB_SESSION(sb) << sb->s_blocksize_bits);
|
| 552 |
|
|
|
| 553 |
|
|
udf_debug("Starting at sector %u (%ld byte sectors)\n",
|
| 554 |
|
|
(sector >> sb->s_blocksize_bits), sb->s_blocksize);
|
| 555 |
|
|
/* Process the sequence (if applicable) */
|
| 556 |
|
|
for (; !nsr02 && !nsr03; sector += sectorsize) {
|
| 557 |
|
|
/* Read a block */
|
| 558 |
|
|
bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
|
| 559 |
|
|
if (!bh)
|
| 560 |
|
|
break;
|
| 561 |
|
|
|
| 562 |
|
|
/* Look for ISO descriptors */
|
| 563 |
|
|
vsd = (struct volStructDesc *)(bh->b_data +
|
| 564 |
|
|
(sector & (sb->s_blocksize - 1)));
|
| 565 |
|
|
|
| 566 |
|
|
if (vsd->stdIdent[0] == 0) {
|
| 567 |
|
|
brelse(bh);
|
| 568 |
|
|
break;
|
| 569 |
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) {
|
| 570 |
|
|
iso9660 = sector;
|
| 571 |
|
|
switch (vsd->structType) {
|
| 572 |
|
|
case 0:
|
| 573 |
|
|
udf_debug("ISO9660 Boot Record found\n");
|
| 574 |
|
|
break;
|
| 575 |
|
|
case 1:
|
| 576 |
|
|
udf_debug
|
| 577 |
|
|
("ISO9660 Primary Volume Descriptor found\n");
|
| 578 |
|
|
break;
|
| 579 |
|
|
case 2:
|
| 580 |
|
|
udf_debug
|
| 581 |
|
|
("ISO9660 Supplementary Volume Descriptor found\n");
|
| 582 |
|
|
break;
|
| 583 |
|
|
case 3:
|
| 584 |
|
|
udf_debug
|
| 585 |
|
|
("ISO9660 Volume Partition Descriptor found\n");
|
| 586 |
|
|
break;
|
| 587 |
|
|
case 255:
|
| 588 |
|
|
udf_debug
|
| 589 |
|
|
("ISO9660 Volume Descriptor Set Terminator found\n");
|
| 590 |
|
|
break;
|
| 591 |
|
|
default:
|
| 592 |
|
|
udf_debug("ISO9660 VRS (%u) found\n",
|
| 593 |
|
|
vsd->structType);
|
| 594 |
|
|
break;
|
| 595 |
|
|
}
|
| 596 |
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN)) {
|
| 597 |
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, VSD_STD_ID_LEN)) {
|
| 598 |
|
|
brelse(bh);
|
| 599 |
|
|
break;
|
| 600 |
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN)) {
|
| 601 |
|
|
nsr02 = sector;
|
| 602 |
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN)) {
|
| 603 |
|
|
nsr03 = sector;
|
| 604 |
|
|
}
|
| 605 |
|
|
brelse(bh);
|
| 606 |
|
|
}
|
| 607 |
|
|
|
| 608 |
|
|
if (nsr03)
|
| 609 |
|
|
return nsr03;
|
| 610 |
|
|
else if (nsr02)
|
| 611 |
|
|
return nsr02;
|
| 612 |
|
|
else if (sector - (UDF_SB_SESSION(sb) << sb->s_blocksize_bits) == 32768)
|
| 613 |
|
|
return -1;
|
| 614 |
|
|
else
|
| 615 |
|
|
return 0;
|
| 616 |
|
|
}
|
| 617 |
|
|
|
| 618 |
|
|
/*
|
| 619 |
|
|
* udf_find_anchor
|
| 620 |
|
|
*
|
| 621 |
|
|
* PURPOSE
|
| 622 |
|
|
* Find an anchor volume descriptor.
|
| 623 |
|
|
*
|
| 624 |
|
|
* PRE-CONDITIONS
|
| 625 |
|
|
* sb Pointer to _locked_ superblock.
|
| 626 |
|
|
* lastblock Last block on media.
|
| 627 |
|
|
*
|
| 628 |
|
|
* POST-CONDITIONS
|
| 629 |
|
|
* <return> 1 if not found, 0 if ok
|
| 630 |
|
|
*
|
| 631 |
|
|
* HISTORY
|
| 632 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 633 |
|
|
* Written, tested, and released.
|
| 634 |
|
|
*/
|
| 635 |
|
|
static void udf_find_anchor(struct super_block *sb)
|
| 636 |
|
|
{
|
| 637 |
|
|
int lastblock = UDF_SB_LASTBLOCK(sb);
|
| 638 |
|
|
struct buffer_head *bh = NULL;
|
| 639 |
|
|
uint16_t ident;
|
| 640 |
|
|
uint32_t location;
|
| 641 |
|
|
int i;
|
| 642 |
|
|
|
| 643 |
|
|
if (lastblock) {
|
| 644 |
|
|
int varlastblock = udf_variable_to_fixed(lastblock);
|
| 645 |
|
|
int last[] = { lastblock, lastblock - 2,
|
| 646 |
|
|
lastblock - 150, lastblock - 152,
|
| 647 |
|
|
varlastblock, varlastblock - 2,
|
| 648 |
|
|
varlastblock - 150, varlastblock - 152 };
|
| 649 |
|
|
|
| 650 |
|
|
lastblock = 0;
|
| 651 |
|
|
|
| 652 |
|
|
/* Search for an anchor volume descriptor pointer */
|
| 653 |
|
|
|
| 654 |
|
|
/* according to spec, anchor is in either:
|
| 655 |
|
|
* block 256
|
| 656 |
|
|
* lastblock-256
|
| 657 |
|
|
* lastblock
|
| 658 |
|
|
* however, if the disc isn't closed, it could be 512 */
|
| 659 |
|
|
|
| 660 |
|
|
for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) {
|
| 661 |
|
|
if (last[i] < 0 || !(bh = sb_bread(sb, last[i]))) {
|
| 662 |
|
|
ident = location = 0;
|
| 663 |
|
|
} else {
|
| 664 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
| 665 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
| 666 |
|
|
brelse(bh);
|
| 667 |
|
|
}
|
| 668 |
|
|
|
| 669 |
|
|
if (ident == TAG_IDENT_AVDP) {
|
| 670 |
|
|
if (location == last[i] - UDF_SB_SESSION(sb)) {
|
| 671 |
|
|
lastblock = UDF_SB_ANCHOR(sb)[0] = last[i] - UDF_SB_SESSION(sb);
|
| 672 |
|
|
UDF_SB_ANCHOR(sb)[1] = last[i] - 256 - UDF_SB_SESSION(sb);
|
| 673 |
|
|
} else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb)) {
|
| 674 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
| 675 |
|
|
lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb);
|
| 676 |
|
|
UDF_SB_ANCHOR(sb)[1] = lastblock - 256 - UDF_SB_SESSION(sb);
|
| 677 |
|
|
} else {
|
| 678 |
|
|
udf_debug("Anchor found at block %d, location mismatch %d.\n",
|
| 679 |
|
|
last[i], location);
|
| 680 |
|
|
}
|
| 681 |
|
|
} else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE) {
|
| 682 |
|
|
lastblock = last[i];
|
| 683 |
|
|
UDF_SB_ANCHOR(sb)[3] = 512;
|
| 684 |
|
|
} else {
|
| 685 |
|
|
if (last[i] < 256 || !(bh = sb_bread(sb, last[i] - 256))) {
|
| 686 |
|
|
ident = location = 0;
|
| 687 |
|
|
} else {
|
| 688 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
| 689 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
| 690 |
|
|
brelse(bh);
|
| 691 |
|
|
}
|
| 692 |
|
|
|
| 693 |
|
|
if (ident == TAG_IDENT_AVDP &&
|
| 694 |
|
|
location == last[i] - 256 - UDF_SB_SESSION(sb)) {
|
| 695 |
|
|
lastblock = last[i];
|
| 696 |
|
|
UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
|
| 697 |
|
|
} else {
|
| 698 |
|
|
if (last[i] < 312 + UDF_SB_SESSION(sb) ||
|
| 699 |
|
|
!(bh = sb_bread(sb, last[i] - 312 - UDF_SB_SESSION(sb)))) {
|
| 700 |
|
|
ident = location = 0;
|
| 701 |
|
|
} else {
|
| 702 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
| 703 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
| 704 |
|
|
brelse(bh);
|
| 705 |
|
|
}
|
| 706 |
|
|
|
| 707 |
|
|
if (ident == TAG_IDENT_AVDP &&
|
| 708 |
|
|
location == udf_variable_to_fixed(last[i]) - 256) {
|
| 709 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
| 710 |
|
|
lastblock = udf_variable_to_fixed(last[i]);
|
| 711 |
|
|
UDF_SB_ANCHOR(sb)[1] = lastblock - 256;
|
| 712 |
|
|
}
|
| 713 |
|
|
}
|
| 714 |
|
|
}
|
| 715 |
|
|
}
|
| 716 |
|
|
}
|
| 717 |
|
|
|
| 718 |
|
|
if (!lastblock) {
|
| 719 |
|
|
/* We havn't found the lastblock. check 312 */
|
| 720 |
|
|
if ((bh = sb_bread(sb, 312 + UDF_SB_SESSION(sb)))) {
|
| 721 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
| 722 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
| 723 |
|
|
brelse(bh);
|
| 724 |
|
|
|
| 725 |
|
|
if (ident == TAG_IDENT_AVDP && location == 256)
|
| 726 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
| 727 |
|
|
}
|
| 728 |
|
|
}
|
| 729 |
|
|
|
| 730 |
|
|
for (i = 0; i < ARRAY_SIZE(UDF_SB_ANCHOR(sb)); i++) {
|
| 731 |
|
|
if (UDF_SB_ANCHOR(sb)[i]) {
|
| 732 |
|
|
if (!(bh = udf_read_tagged(sb, UDF_SB_ANCHOR(sb)[i],
|
| 733 |
|
|
UDF_SB_ANCHOR(sb)[i], &ident))) {
|
| 734 |
|
|
UDF_SB_ANCHOR(sb)[i] = 0;
|
| 735 |
|
|
} else {
|
| 736 |
|
|
brelse(bh);
|
| 737 |
|
|
if ((ident != TAG_IDENT_AVDP) &&
|
| 738 |
|
|
(i || (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE))) {
|
| 739 |
|
|
UDF_SB_ANCHOR(sb)[i] = 0;
|
| 740 |
|
|
}
|
| 741 |
|
|
}
|
| 742 |
|
|
}
|
| 743 |
|
|
}
|
| 744 |
|
|
|
| 745 |
|
|
UDF_SB_LASTBLOCK(sb) = lastblock;
|
| 746 |
|
|
}
|
| 747 |
|
|
|
| 748 |
|
|
static int udf_find_fileset(struct super_block *sb, kernel_lb_addr *fileset, kernel_lb_addr *root)
|
| 749 |
|
|
{
|
| 750 |
|
|
struct buffer_head *bh = NULL;
|
| 751 |
|
|
long lastblock;
|
| 752 |
|
|
uint16_t ident;
|
| 753 |
|
|
|
| 754 |
|
|
if (fileset->logicalBlockNum != 0xFFFFFFFF ||
|
| 755 |
|
|
fileset->partitionReferenceNum != 0xFFFF) {
|
| 756 |
|
|
bh = udf_read_ptagged(sb, *fileset, 0, &ident);
|
| 757 |
|
|
|
| 758 |
|
|
if (!bh) {
|
| 759 |
|
|
return 1;
|
| 760 |
|
|
} else if (ident != TAG_IDENT_FSD) {
|
| 761 |
|
|
brelse(bh);
|
| 762 |
|
|
return 1;
|
| 763 |
|
|
}
|
| 764 |
|
|
|
| 765 |
|
|
}
|
| 766 |
|
|
|
| 767 |
|
|
if (!bh) { /* Search backwards through the partitions */
|
| 768 |
|
|
kernel_lb_addr newfileset;
|
| 769 |
|
|
|
| 770 |
|
|
/* --> cvg: FIXME - is it reasonable? */
|
| 771 |
|
|
return 1;
|
| 772 |
|
|
|
| 773 |
|
|
for (newfileset.partitionReferenceNum = UDF_SB_NUMPARTS(sb) - 1;
|
| 774 |
|
|
(newfileset.partitionReferenceNum != 0xFFFF &&
|
| 775 |
|
|
fileset->logicalBlockNum == 0xFFFFFFFF &&
|
| 776 |
|
|
fileset->partitionReferenceNum == 0xFFFF);
|
| 777 |
|
|
newfileset.partitionReferenceNum--) {
|
| 778 |
|
|
lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum);
|
| 779 |
|
|
newfileset.logicalBlockNum = 0;
|
| 780 |
|
|
|
| 781 |
|
|
do {
|
| 782 |
|
|
bh = udf_read_ptagged(sb, newfileset, 0, &ident);
|
| 783 |
|
|
if (!bh) {
|
| 784 |
|
|
newfileset.logicalBlockNum++;
|
| 785 |
|
|
continue;
|
| 786 |
|
|
}
|
| 787 |
|
|
|
| 788 |
|
|
switch (ident) {
|
| 789 |
|
|
case TAG_IDENT_SBD:
|
| 790 |
|
|
{
|
| 791 |
|
|
struct spaceBitmapDesc *sp;
|
| 792 |
|
|
sp = (struct spaceBitmapDesc *)bh->b_data;
|
| 793 |
|
|
newfileset.logicalBlockNum += 1 +
|
| 794 |
|
|
((le32_to_cpu(sp->numOfBytes) +
|
| 795 |
|
|
sizeof(struct spaceBitmapDesc) - 1)
|
| 796 |
|
|
>> sb->s_blocksize_bits);
|
| 797 |
|
|
brelse(bh);
|
| 798 |
|
|
break;
|
| 799 |
|
|
}
|
| 800 |
|
|
case TAG_IDENT_FSD:
|
| 801 |
|
|
*fileset = newfileset;
|
| 802 |
|
|
break;
|
| 803 |
|
|
default:
|
| 804 |
|
|
newfileset.logicalBlockNum++;
|
| 805 |
|
|
brelse(bh);
|
| 806 |
|
|
bh = NULL;
|
| 807 |
|
|
break;
|
| 808 |
|
|
}
|
| 809 |
|
|
} while (newfileset.logicalBlockNum < lastblock &&
|
| 810 |
|
|
fileset->logicalBlockNum == 0xFFFFFFFF &&
|
| 811 |
|
|
fileset->partitionReferenceNum == 0xFFFF);
|
| 812 |
|
|
}
|
| 813 |
|
|
}
|
| 814 |
|
|
|
| 815 |
|
|
if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
|
| 816 |
|
|
fileset->partitionReferenceNum != 0xFFFF) && bh) {
|
| 817 |
|
|
udf_debug("Fileset at block=%d, partition=%d\n",
|
| 818 |
|
|
fileset->logicalBlockNum,
|
| 819 |
|
|
fileset->partitionReferenceNum);
|
| 820 |
|
|
|
| 821 |
|
|
UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum;
|
| 822 |
|
|
udf_load_fileset(sb, bh, root);
|
| 823 |
|
|
brelse(bh);
|
| 824 |
|
|
return 0;
|
| 825 |
|
|
}
|
| 826 |
|
|
return 1;
|
| 827 |
|
|
}
|
| 828 |
|
|
|
| 829 |
|
|
static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
|
| 830 |
|
|
{
|
| 831 |
|
|
struct primaryVolDesc *pvoldesc;
|
| 832 |
|
|
time_t recording;
|
| 833 |
|
|
long recording_usec;
|
| 834 |
|
|
struct ustr instr;
|
| 835 |
|
|
struct ustr outstr;
|
| 836 |
|
|
|
| 837 |
|
|
pvoldesc = (struct primaryVolDesc *)bh->b_data;
|
| 838 |
|
|
|
| 839 |
|
|
if (udf_stamp_to_time(&recording, &recording_usec,
|
| 840 |
|
|
lets_to_cpu(pvoldesc->recordingDateAndTime))) {
|
| 841 |
|
|
kernel_timestamp ts;
|
| 842 |
|
|
ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
|
| 843 |
|
|
udf_debug("recording time %ld/%ld, %04u/%02u/%02u %02u:%02u (%x)\n",
|
| 844 |
|
|
recording, recording_usec,
|
| 845 |
|
|
ts.year, ts.month, ts.day, ts.hour,
|
| 846 |
|
|
ts.minute, ts.typeAndTimezone);
|
| 847 |
|
|
UDF_SB_RECORDTIME(sb).tv_sec = recording;
|
| 848 |
|
|
UDF_SB_RECORDTIME(sb).tv_nsec = recording_usec * 1000;
|
| 849 |
|
|
}
|
| 850 |
|
|
|
| 851 |
|
|
if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) {
|
| 852 |
|
|
if (udf_CS0toUTF8(&outstr, &instr)) {
|
| 853 |
|
|
strncpy(UDF_SB_VOLIDENT(sb), outstr.u_name,
|
| 854 |
|
|
outstr.u_len > 31 ? 31 : outstr.u_len);
|
| 855 |
|
|
udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb));
|
| 856 |
|
|
}
|
| 857 |
|
|
}
|
| 858 |
|
|
|
| 859 |
|
|
if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) {
|
| 860 |
|
|
if (udf_CS0toUTF8(&outstr, &instr))
|
| 861 |
|
|
udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
|
| 862 |
|
|
}
|
| 863 |
|
|
}
|
| 864 |
|
|
|
| 865 |
|
|
static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
|
| 866 |
|
|
kernel_lb_addr *root)
|
| 867 |
|
|
{
|
| 868 |
|
|
struct fileSetDesc *fset;
|
| 869 |
|
|
|
| 870 |
|
|
fset = (struct fileSetDesc *)bh->b_data;
|
| 871 |
|
|
|
| 872 |
|
|
*root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
|
| 873 |
|
|
|
| 874 |
|
|
UDF_SB_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum);
|
| 875 |
|
|
|
| 876 |
|
|
udf_debug("Rootdir at block=%d, partition=%d\n",
|
| 877 |
|
|
root->logicalBlockNum, root->partitionReferenceNum);
|
| 878 |
|
|
}
|
| 879 |
|
|
|
| 880 |
|
|
static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
|
| 881 |
|
|
{
|
| 882 |
|
|
struct partitionDesc *p;
|
| 883 |
|
|
int i;
|
| 884 |
|
|
|
| 885 |
|
|
p = (struct partitionDesc *)bh->b_data;
|
| 886 |
|
|
|
| 887 |
|
|
for (i = 0; i < UDF_SB_NUMPARTS(sb); i++) {
|
| 888 |
|
|
udf_debug("Searching map: (%d == %d)\n",
|
| 889 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber));
|
| 890 |
|
|
if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber)) {
|
| 891 |
|
|
UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */
|
| 892 |
|
|
UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation);
|
| 893 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY)
|
| 894 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_READ_ONLY;
|
| 895 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE)
|
| 896 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_WRITE_ONCE;
|
| 897 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE)
|
| 898 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_REWRITABLE;
|
| 899 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE)
|
| 900 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_OVERWRITABLE;
|
| 901 |
|
|
|
| 902 |
|
|
if (!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) ||
|
| 903 |
|
|
!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) {
|
| 904 |
|
|
struct partitionHeaderDesc *phd;
|
| 905 |
|
|
|
| 906 |
|
|
phd = (struct partitionHeaderDesc *)(p->partitionContentsUse);
|
| 907 |
|
|
if (phd->unallocSpaceTable.extLength) {
|
| 908 |
|
|
kernel_lb_addr loc = {
|
| 909 |
|
|
.logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition),
|
| 910 |
|
|
.partitionReferenceNum = i,
|
| 911 |
|
|
};
|
| 912 |
|
|
|
| 913 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table =
|
| 914 |
|
|
udf_iget(sb, loc);
|
| 915 |
|
|
if (!UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table) {
|
| 916 |
|
|
udf_debug("cannot load unallocSpaceTable (part %d)\n", i);
|
| 917 |
|
|
return 1;
|
| 918 |
|
|
}
|
| 919 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_TABLE;
|
| 920 |
|
|
udf_debug("unallocSpaceTable (part %d) @ %ld\n",
|
| 921 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino);
|
| 922 |
|
|
}
|
| 923 |
|
|
if (phd->unallocSpaceBitmap.extLength) {
|
| 924 |
|
|
UDF_SB_ALLOC_BITMAP(sb, i, s_uspace);
|
| 925 |
|
|
if (UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap != NULL) {
|
| 926 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extLength =
|
| 927 |
|
|
le32_to_cpu(phd->unallocSpaceBitmap.extLength);
|
| 928 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition =
|
| 929 |
|
|
le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
|
| 930 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP;
|
| 931 |
|
|
udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
|
| 932 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition);
|
| 933 |
|
|
}
|
| 934 |
|
|
}
|
| 935 |
|
|
if (phd->partitionIntegrityTable.extLength)
|
| 936 |
|
|
udf_debug("partitionIntegrityTable (part %d)\n", i);
|
| 937 |
|
|
if (phd->freedSpaceTable.extLength) {
|
| 938 |
|
|
kernel_lb_addr loc = {
|
| 939 |
|
|
.logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition),
|
| 940 |
|
|
.partitionReferenceNum = i,
|
| 941 |
|
|
};
|
| 942 |
|
|
|
| 943 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table =
|
| 944 |
|
|
udf_iget(sb, loc);
|
| 945 |
|
|
if (!UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table) {
|
| 946 |
|
|
udf_debug("cannot load freedSpaceTable (part %d)\n", i);
|
| 947 |
|
|
return 1;
|
| 948 |
|
|
}
|
| 949 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_TABLE;
|
| 950 |
|
|
udf_debug("freedSpaceTable (part %d) @ %ld\n",
|
| 951 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table->i_ino);
|
| 952 |
|
|
}
|
| 953 |
|
|
if (phd->freedSpaceBitmap.extLength) {
|
| 954 |
|
|
UDF_SB_ALLOC_BITMAP(sb, i, s_fspace);
|
| 955 |
|
|
if (UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap != NULL) {
|
| 956 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extLength =
|
| 957 |
|
|
le32_to_cpu(phd->freedSpaceBitmap.extLength);
|
| 958 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition =
|
| 959 |
|
|
le32_to_cpu(phd->freedSpaceBitmap.extPosition);
|
| 960 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP;
|
| 961 |
|
|
udf_debug("freedSpaceBitmap (part %d) @ %d\n",
|
| 962 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition);
|
| 963 |
|
|
}
|
| 964 |
|
|
}
|
| 965 |
|
|
}
|
| 966 |
|
|
break;
|
| 967 |
|
|
}
|
| 968 |
|
|
}
|
| 969 |
|
|
if (i == UDF_SB_NUMPARTS(sb)) {
|
| 970 |
|
|
udf_debug("Partition (%d) not found in partition map\n",
|
| 971 |
|
|
le16_to_cpu(p->partitionNumber));
|
| 972 |
|
|
} else {
|
| 973 |
|
|
udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %d\n",
|
| 974 |
|
|
le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i),
|
| 975 |
|
|
UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i));
|
| 976 |
|
|
}
|
| 977 |
|
|
return 0;
|
| 978 |
|
|
}
|
| 979 |
|
|
|
| 980 |
|
|
static int udf_load_logicalvol(struct super_block *sb, struct buffer_head *bh,
|
| 981 |
|
|
kernel_lb_addr *fileset)
|
| 982 |
|
|
{
|
| 983 |
|
|
struct logicalVolDesc *lvd;
|
| 984 |
|
|
int i, j, offset;
|
| 985 |
|
|
uint8_t type;
|
| 986 |
|
|
|
| 987 |
|
|
lvd = (struct logicalVolDesc *)bh->b_data;
|
| 988 |
|
|
|
| 989 |
|
|
UDF_SB_ALLOC_PARTMAPS(sb, le32_to_cpu(lvd->numPartitionMaps));
|
| 990 |
|
|
|
| 991 |
|
|
for (i = 0, offset = 0;
|
| 992 |
|
|
i < UDF_SB_NUMPARTS(sb) && offset < le32_to_cpu(lvd->mapTableLength);
|
| 993 |
|
|
i++, offset += ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength) {
|
| 994 |
|
|
type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType;
|
| 995 |
|
|
if (type == 1) {
|
| 996 |
|
|
struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]);
|
| 997 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15;
|
| 998 |
|
|
UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum);
|
| 999 |
|
|
UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum);
|
| 1000 |
|
|
UDF_SB_PARTFUNC(sb,i) = NULL;
|
| 1001 |
|
|
} else if (type == 2) {
|
| 1002 |
|
|
struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]);
|
| 1003 |
|
|
if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL))) {
|
| 1004 |
|
|
if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0150) {
|
| 1005 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15;
|
| 1006 |
|
|
UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15;
|
| 1007 |
|
|
} else if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0200) {
|
| 1008 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20;
|
| 1009 |
|
|
UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20;
|
| 1010 |
|
|
}
|
| 1011 |
|
|
} else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE))) {
|
| 1012 |
|
|
uint32_t loc;
|
| 1013 |
|
|
uint16_t ident;
|
| 1014 |
|
|
struct sparingTable *st;
|
| 1015 |
|
|
struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]);
|
| 1016 |
|
|
|
| 1017 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15;
|
| 1018 |
|
|
UDF_SB_TYPESPAR(sb,i).s_packet_len = le16_to_cpu(spm->packetLength);
|
| 1019 |
|
|
for (j = 0; j < spm->numSparingTables; j++) {
|
| 1020 |
|
|
loc = le32_to_cpu(spm->locSparingTable[j]);
|
| 1021 |
|
|
UDF_SB_TYPESPAR(sb,i).s_spar_map[j] =
|
| 1022 |
|
|
udf_read_tagged(sb, loc, loc, &ident);
|
| 1023 |
|
|
if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL) {
|
| 1024 |
|
|
st = (struct sparingTable *)UDF_SB_TYPESPAR(sb,i).s_spar_map[j]->b_data;
|
| 1025 |
|
|
if (ident != 0 ||
|
| 1026 |
|
|
strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING))) {
|
| 1027 |
|
|
brelse(UDF_SB_TYPESPAR(sb,i).s_spar_map[j]);
|
| 1028 |
|
|
UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = NULL;
|
| 1029 |
|
|
}
|
| 1030 |
|
|
}
|
| 1031 |
|
|
}
|
| 1032 |
|
|
UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15;
|
| 1033 |
|
|
} else {
|
| 1034 |
|
|
udf_debug("Unknown ident: %s\n", upm2->partIdent.ident);
|
| 1035 |
|
|
continue;
|
| 1036 |
|
|
}
|
| 1037 |
|
|
UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum);
|
| 1038 |
|
|
UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum);
|
| 1039 |
|
|
}
|
| 1040 |
|
|
udf_debug("Partition (%d:%d) type %d on volume %d\n",
|
| 1041 |
|
|
i, UDF_SB_PARTNUM(sb,i), type, UDF_SB_PARTVSN(sb,i));
|
| 1042 |
|
|
}
|
| 1043 |
|
|
|
| 1044 |
|
|
if (fileset) {
|
| 1045 |
|
|
long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
|
| 1046 |
|
|
|
| 1047 |
|
|
*fileset = lelb_to_cpu(la->extLocation);
|
| 1048 |
|
|
udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
|
| 1049 |
|
|
fileset->logicalBlockNum,
|
| 1050 |
|
|
fileset->partitionReferenceNum);
|
| 1051 |
|
|
}
|
| 1052 |
|
|
if (lvd->integritySeqExt.extLength)
|
| 1053 |
|
|
udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
|
| 1054 |
|
|
|
| 1055 |
|
|
return 0;
|
| 1056 |
|
|
}
|
| 1057 |
|
|
|
| 1058 |
|
|
/*
|
| 1059 |
|
|
* udf_load_logicalvolint
|
| 1060 |
|
|
*
|
| 1061 |
|
|
*/
|
| 1062 |
|
|
static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
|
| 1063 |
|
|
{
|
| 1064 |
|
|
struct buffer_head *bh = NULL;
|
| 1065 |
|
|
uint16_t ident;
|
| 1066 |
|
|
|
| 1067 |
|
|
while (loc.extLength > 0 &&
|
| 1068 |
|
|
(bh = udf_read_tagged(sb, loc.extLocation,
|
| 1069 |
|
|
loc.extLocation, &ident)) &&
|
| 1070 |
|
|
ident == TAG_IDENT_LVID) {
|
| 1071 |
|
|
UDF_SB_LVIDBH(sb) = bh;
|
| 1072 |
|
|
|
| 1073 |
|
|
if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength)
|
| 1074 |
|
|
udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt));
|
| 1075 |
|
|
|
| 1076 |
|
|
if (UDF_SB_LVIDBH(sb) != bh)
|
| 1077 |
|
|
brelse(bh);
|
| 1078 |
|
|
loc.extLength -= sb->s_blocksize;
|
| 1079 |
|
|
loc.extLocation++;
|
| 1080 |
|
|
}
|
| 1081 |
|
|
if (UDF_SB_LVIDBH(sb) != bh)
|
| 1082 |
|
|
brelse(bh);
|
| 1083 |
|
|
}
|
| 1084 |
|
|
|
| 1085 |
|
|
/*
|
| 1086 |
|
|
* udf_process_sequence
|
| 1087 |
|
|
*
|
| 1088 |
|
|
* PURPOSE
|
| 1089 |
|
|
* Process a main/reserve volume descriptor sequence.
|
| 1090 |
|
|
*
|
| 1091 |
|
|
* PRE-CONDITIONS
|
| 1092 |
|
|
* sb Pointer to _locked_ superblock.
|
| 1093 |
|
|
* block First block of first extent of the sequence.
|
| 1094 |
|
|
* lastblock Lastblock of first extent of the sequence.
|
| 1095 |
|
|
*
|
| 1096 |
|
|
* HISTORY
|
| 1097 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 1098 |
|
|
* Written, tested, and released.
|
| 1099 |
|
|
*/
|
| 1100 |
|
|
static int udf_process_sequence(struct super_block *sb, long block, long lastblock,
|
| 1101 |
|
|
kernel_lb_addr *fileset)
|
| 1102 |
|
|
{
|
| 1103 |
|
|
struct buffer_head *bh = NULL;
|
| 1104 |
|
|
struct udf_vds_record vds[VDS_POS_LENGTH];
|
| 1105 |
|
|
struct generic_desc *gd;
|
| 1106 |
|
|
struct volDescPtr *vdp;
|
| 1107 |
|
|
int done = 0;
|
| 1108 |
|
|
int i, j;
|
| 1109 |
|
|
uint32_t vdsn;
|
| 1110 |
|
|
uint16_t ident;
|
| 1111 |
|
|
long next_s = 0, next_e = 0;
|
| 1112 |
|
|
|
| 1113 |
|
|
memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
|
| 1114 |
|
|
|
| 1115 |
|
|
/* Read the main descriptor sequence */
|
| 1116 |
|
|
for (; (!done && block <= lastblock); block++) {
|
| 1117 |
|
|
|
| 1118 |
|
|
bh = udf_read_tagged(sb, block, block, &ident);
|
| 1119 |
|
|
if (!bh)
|
| 1120 |
|
|
break;
|
| 1121 |
|
|
|
| 1122 |
|
|
/* Process each descriptor (ISO 13346 3/8.3-8.4) */
|
| 1123 |
|
|
gd = (struct generic_desc *)bh->b_data;
|
| 1124 |
|
|
vdsn = le32_to_cpu(gd->volDescSeqNum);
|
| 1125 |
|
|
switch (ident) {
|
| 1126 |
|
|
case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
|
| 1127 |
|
|
if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum) {
|
| 1128 |
|
|
vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn;
|
| 1129 |
|
|
vds[VDS_POS_PRIMARY_VOL_DESC].block = block;
|
| 1130 |
|
|
}
|
| 1131 |
|
|
break;
|
| 1132 |
|
|
case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
|
| 1133 |
|
|
if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum) {
|
| 1134 |
|
|
vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn;
|
| 1135 |
|
|
vds[VDS_POS_VOL_DESC_PTR].block = block;
|
| 1136 |
|
|
|
| 1137 |
|
|
vdp = (struct volDescPtr *)bh->b_data;
|
| 1138 |
|
|
next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
|
| 1139 |
|
|
next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength);
|
| 1140 |
|
|
next_e = next_e >> sb->s_blocksize_bits;
|
| 1141 |
|
|
next_e += next_s;
|
| 1142 |
|
|
}
|
| 1143 |
|
|
break;
|
| 1144 |
|
|
case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
|
| 1145 |
|
|
if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum) {
|
| 1146 |
|
|
vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn;
|
| 1147 |
|
|
vds[VDS_POS_IMP_USE_VOL_DESC].block = block;
|
| 1148 |
|
|
}
|
| 1149 |
|
|
break;
|
| 1150 |
|
|
case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
|
| 1151 |
|
|
if (!vds[VDS_POS_PARTITION_DESC].block)
|
| 1152 |
|
|
vds[VDS_POS_PARTITION_DESC].block = block;
|
| 1153 |
|
|
break;
|
| 1154 |
|
|
case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
|
| 1155 |
|
|
if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum) {
|
| 1156 |
|
|
vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn;
|
| 1157 |
|
|
vds[VDS_POS_LOGICAL_VOL_DESC].block = block;
|
| 1158 |
|
|
}
|
| 1159 |
|
|
break;
|
| 1160 |
|
|
case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
|
| 1161 |
|
|
if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum) {
|
| 1162 |
|
|
vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn;
|
| 1163 |
|
|
vds[VDS_POS_UNALLOC_SPACE_DESC].block = block;
|
| 1164 |
|
|
}
|
| 1165 |
|
|
break;
|
| 1166 |
|
|
case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
|
| 1167 |
|
|
vds[VDS_POS_TERMINATING_DESC].block = block;
|
| 1168 |
|
|
if (next_e) {
|
| 1169 |
|
|
block = next_s;
|
| 1170 |
|
|
lastblock = next_e;
|
| 1171 |
|
|
next_s = next_e = 0;
|
| 1172 |
|
|
} else {
|
| 1173 |
|
|
done = 1;
|
| 1174 |
|
|
}
|
| 1175 |
|
|
break;
|
| 1176 |
|
|
}
|
| 1177 |
|
|
brelse(bh);
|
| 1178 |
|
|
}
|
| 1179 |
|
|
for (i = 0; i < VDS_POS_LENGTH; i++) {
|
| 1180 |
|
|
if (vds[i].block) {
|
| 1181 |
|
|
bh = udf_read_tagged(sb, vds[i].block, vds[i].block, &ident);
|
| 1182 |
|
|
|
| 1183 |
|
|
if (i == VDS_POS_PRIMARY_VOL_DESC) {
|
| 1184 |
|
|
udf_load_pvoldesc(sb, bh);
|
| 1185 |
|
|
} else if (i == VDS_POS_LOGICAL_VOL_DESC) {
|
| 1186 |
|
|
udf_load_logicalvol(sb, bh, fileset);
|
| 1187 |
|
|
} else if (i == VDS_POS_PARTITION_DESC) {
|
| 1188 |
|
|
struct buffer_head *bh2 = NULL;
|
| 1189 |
|
|
if (udf_load_partdesc(sb, bh)) {
|
| 1190 |
|
|
brelse(bh);
|
| 1191 |
|
|
return 1;
|
| 1192 |
|
|
}
|
| 1193 |
|
|
for (j = vds[i].block + 1; j < vds[VDS_POS_TERMINATING_DESC].block; j++) {
|
| 1194 |
|
|
bh2 = udf_read_tagged(sb, j, j, &ident);
|
| 1195 |
|
|
gd = (struct generic_desc *)bh2->b_data;
|
| 1196 |
|
|
if (ident == TAG_IDENT_PD)
|
| 1197 |
|
|
if (udf_load_partdesc(sb, bh2)) {
|
| 1198 |
|
|
brelse(bh);
|
| 1199 |
|
|
brelse(bh2);
|
| 1200 |
|
|
return 1;
|
| 1201 |
|
|
}
|
| 1202 |
|
|
brelse(bh2);
|
| 1203 |
|
|
}
|
| 1204 |
|
|
}
|
| 1205 |
|
|
brelse(bh);
|
| 1206 |
|
|
}
|
| 1207 |
|
|
}
|
| 1208 |
|
|
|
| 1209 |
|
|
return 0;
|
| 1210 |
|
|
}
|
| 1211 |
|
|
|
| 1212 |
|
|
/*
|
| 1213 |
|
|
* udf_check_valid()
|
| 1214 |
|
|
*/
|
| 1215 |
|
|
static int udf_check_valid(struct super_block *sb, int novrs, int silent)
|
| 1216 |
|
|
{
|
| 1217 |
|
|
long block;
|
| 1218 |
|
|
|
| 1219 |
|
|
if (novrs) {
|
| 1220 |
|
|
udf_debug("Validity check skipped because of novrs option\n");
|
| 1221 |
|
|
return 0;
|
| 1222 |
|
|
}
|
| 1223 |
|
|
/* Check that it is NSR02 compliant */
|
| 1224 |
|
|
/* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
|
| 1225 |
|
|
else if ((block = udf_vrs(sb, silent)) == -1) {
|
| 1226 |
|
|
udf_debug("Failed to read byte 32768. Assuming open disc. "
|
| 1227 |
|
|
"Skipping validity check\n");
|
| 1228 |
|
|
if (!UDF_SB_LASTBLOCK(sb))
|
| 1229 |
|
|
UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
|
| 1230 |
|
|
return 0;
|
| 1231 |
|
|
} else {
|
| 1232 |
|
|
return !block;
|
| 1233 |
|
|
}
|
| 1234 |
|
|
}
|
| 1235 |
|
|
|
| 1236 |
|
|
static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
|
| 1237 |
|
|
{
|
| 1238 |
|
|
struct anchorVolDescPtr *anchor;
|
| 1239 |
|
|
uint16_t ident;
|
| 1240 |
|
|
struct buffer_head *bh;
|
| 1241 |
|
|
long main_s, main_e, reserve_s, reserve_e;
|
| 1242 |
|
|
int i, j;
|
| 1243 |
|
|
|
| 1244 |
|
|
if (!sb)
|
| 1245 |
|
|
return 1;
|
| 1246 |
|
|
|
| 1247 |
|
|
for (i = 0; i < ARRAY_SIZE(UDF_SB_ANCHOR(sb)); i++) {
|
| 1248 |
|
|
if (UDF_SB_ANCHOR(sb)[i] &&
|
| 1249 |
|
|
(bh = udf_read_tagged(sb, UDF_SB_ANCHOR(sb)[i],
|
| 1250 |
|
|
UDF_SB_ANCHOR(sb)[i], &ident))) {
|
| 1251 |
|
|
anchor = (struct anchorVolDescPtr *)bh->b_data;
|
| 1252 |
|
|
|
| 1253 |
|
|
/* Locate the main sequence */
|
| 1254 |
|
|
main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
|
| 1255 |
|
|
main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength );
|
| 1256 |
|
|
main_e = main_e >> sb->s_blocksize_bits;
|
| 1257 |
|
|
main_e += main_s;
|
| 1258 |
|
|
|
| 1259 |
|
|
/* Locate the reserve sequence */
|
| 1260 |
|
|
reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
|
| 1261 |
|
|
reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
|
| 1262 |
|
|
reserve_e = reserve_e >> sb->s_blocksize_bits;
|
| 1263 |
|
|
reserve_e += reserve_s;
|
| 1264 |
|
|
|
| 1265 |
|
|
brelse(bh);
|
| 1266 |
|
|
|
| 1267 |
|
|
/* Process the main & reserve sequences */
|
| 1268 |
|
|
/* responsible for finding the PartitionDesc(s) */
|
| 1269 |
|
|
if (!(udf_process_sequence(sb, main_s, main_e, fileset) &&
|
| 1270 |
|
|
udf_process_sequence(sb, reserve_s, reserve_e, fileset))) {
|
| 1271 |
|
|
break;
|
| 1272 |
|
|
}
|
| 1273 |
|
|
}
|
| 1274 |
|
|
}
|
| 1275 |
|
|
|
| 1276 |
|
|
if (i == ARRAY_SIZE(UDF_SB_ANCHOR(sb))) {
|
| 1277 |
|
|
udf_debug("No Anchor block found\n");
|
| 1278 |
|
|
return 1;
|
| 1279 |
|
|
} else
|
| 1280 |
|
|
udf_debug("Using anchor in block %d\n", UDF_SB_ANCHOR(sb)[i]);
|
| 1281 |
|
|
|
| 1282 |
|
|
for (i = 0; i < UDF_SB_NUMPARTS(sb); i++) {
|
| 1283 |
|
|
kernel_lb_addr uninitialized_var(ino);
|
| 1284 |
|
|
switch (UDF_SB_PARTTYPE(sb, i)) {
|
| 1285 |
|
|
case UDF_VIRTUAL_MAP15:
|
| 1286 |
|
|
case UDF_VIRTUAL_MAP20:
|
| 1287 |
|
|
if (!UDF_SB_LASTBLOCK(sb)) {
|
| 1288 |
|
|
UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
|
| 1289 |
|
|
udf_find_anchor(sb);
|
| 1290 |
|
|
}
|
| 1291 |
|
|
|
| 1292 |
|
|
if (!UDF_SB_LASTBLOCK(sb)) {
|
| 1293 |
|
|
udf_debug("Unable to determine Lastblock (For "
|
| 1294 |
|
|
"Virtual Partition)\n");
|
| 1295 |
|
|
return 1;
|
| 1296 |
|
|
}
|
| 1297 |
|
|
|
| 1298 |
|
|
for (j = 0; j < UDF_SB_NUMPARTS(sb); j++) {
|
| 1299 |
|
|
if (j != i &&
|
| 1300 |
|
|
UDF_SB_PARTVSN(sb, i) == UDF_SB_PARTVSN(sb, j) &&
|
| 1301 |
|
|
UDF_SB_PARTNUM(sb, i) == UDF_SB_PARTNUM(sb, j)) {
|
| 1302 |
|
|
ino.partitionReferenceNum = j;
|
| 1303 |
|
|
ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) - UDF_SB_PARTROOT(sb, j);
|
| 1304 |
|
|
break;
|
| 1305 |
|
|
}
|
| 1306 |
|
|
}
|
| 1307 |
|
|
|
| 1308 |
|
|
if (j == UDF_SB_NUMPARTS(sb))
|
| 1309 |
|
|
return 1;
|
| 1310 |
|
|
|
| 1311 |
|
|
if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino)))
|
| 1312 |
|
|
return 1;
|
| 1313 |
|
|
|
| 1314 |
|
|
if (UDF_SB_PARTTYPE(sb, i) == UDF_VIRTUAL_MAP15) {
|
| 1315 |
|
|
UDF_SB_TYPEVIRT(sb, i).s_start_offset =
|
| 1316 |
|
|
udf_ext0_offset(UDF_SB_VAT(sb));
|
| 1317 |
|
|
UDF_SB_TYPEVIRT(sb, i).s_num_entries =
|
| 1318 |
|
|
(UDF_SB_VAT(sb)->i_size - 36) >> 2;
|
| 1319 |
|
|
} else if (UDF_SB_PARTTYPE(sb, i) == UDF_VIRTUAL_MAP20) {
|
| 1320 |
|
|
struct buffer_head *bh = NULL;
|
| 1321 |
|
|
uint32_t pos;
|
| 1322 |
|
|
|
| 1323 |
|
|
pos = udf_block_map(UDF_SB_VAT(sb), 0);
|
| 1324 |
|
|
bh = sb_bread(sb, pos);
|
| 1325 |
|
|
if (!bh)
|
| 1326 |
|
|
return 1;
|
| 1327 |
|
|
UDF_SB_TYPEVIRT(sb, i).s_start_offset =
|
| 1328 |
|
|
le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data +
|
| 1329 |
|
|
udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) +
|
| 1330 |
|
|
udf_ext0_offset(UDF_SB_VAT(sb));
|
| 1331 |
|
|
UDF_SB_TYPEVIRT(sb, i).s_num_entries = (UDF_SB_VAT(sb)->i_size -
|
| 1332 |
|
|
UDF_SB_TYPEVIRT(sb, i).s_start_offset) >> 2;
|
| 1333 |
|
|
brelse(bh);
|
| 1334 |
|
|
}
|
| 1335 |
|
|
UDF_SB_PARTROOT(sb, i) = udf_get_pblock(sb, 0, i, 0);
|
| 1336 |
|
|
UDF_SB_PARTLEN(sb, i) = UDF_SB_PARTLEN(sb, ino.partitionReferenceNum);
|
| 1337 |
|
|
}
|
| 1338 |
|
|
}
|
| 1339 |
|
|
return 0;
|
| 1340 |
|
|
}
|
| 1341 |
|
|
|
| 1342 |
|
|
static void udf_open_lvid(struct super_block *sb)
|
| 1343 |
|
|
{
|
| 1344 |
|
|
if (UDF_SB_LVIDBH(sb)) {
|
| 1345 |
|
|
int i;
|
| 1346 |
|
|
kernel_timestamp cpu_time;
|
| 1347 |
|
|
|
| 1348 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
| 1349 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
| 1350 |
|
|
if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
|
| 1351 |
|
|
UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
|
| 1352 |
|
|
UDF_SB_LVID(sb)->integrityType = LVID_INTEGRITY_TYPE_OPEN;
|
| 1353 |
|
|
|
| 1354 |
|
|
UDF_SB_LVID(sb)->descTag.descCRC = cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
|
| 1355 |
|
|
le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
|
| 1356 |
|
|
|
| 1357 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
|
| 1358 |
|
|
for (i = 0; i < 16; i++)
|
| 1359 |
|
|
if (i != 4)
|
| 1360 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum +=
|
| 1361 |
|
|
((uint8_t *) &(UDF_SB_LVID(sb)->descTag))[i];
|
| 1362 |
|
|
|
| 1363 |
|
|
mark_buffer_dirty(UDF_SB_LVIDBH(sb));
|
| 1364 |
|
|
}
|
| 1365 |
|
|
}
|
| 1366 |
|
|
|
| 1367 |
|
|
static void udf_close_lvid(struct super_block *sb)
|
| 1368 |
|
|
{
|
| 1369 |
|
|
kernel_timestamp cpu_time;
|
| 1370 |
|
|
int i;
|
| 1371 |
|
|
|
| 1372 |
|
|
if (UDF_SB_LVIDBH(sb) &&
|
| 1373 |
|
|
UDF_SB_LVID(sb)->integrityType == LVID_INTEGRITY_TYPE_OPEN) {
|
| 1374 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
| 1375 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
| 1376 |
|
|
if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
|
| 1377 |
|
|
UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
|
| 1378 |
|
|
if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev))
|
| 1379 |
|
|
UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
|
| 1380 |
|
|
if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev))
|
| 1381 |
|
|
UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb));
|
| 1382 |
|
|
if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev))
|
| 1383 |
|
|
UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb));
|
| 1384 |
|
|
UDF_SB_LVID(sb)->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
|
| 1385 |
|
|
|
| 1386 |
|
|
UDF_SB_LVID(sb)->descTag.descCRC =
|
| 1387 |
|
|
cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
|
| 1388 |
|
|
le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
|
| 1389 |
|
|
|
| 1390 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
|
| 1391 |
|
|
for (i = 0; i < 16; i++)
|
| 1392 |
|
|
if (i != 4)
|
| 1393 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum +=
|
| 1394 |
|
|
((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i];
|
| 1395 |
|
|
|
| 1396 |
|
|
mark_buffer_dirty(UDF_SB_LVIDBH(sb));
|
| 1397 |
|
|
}
|
| 1398 |
|
|
}
|
| 1399 |
|
|
|
| 1400 |
|
|
/*
|
| 1401 |
|
|
* udf_read_super
|
| 1402 |
|
|
*
|
| 1403 |
|
|
* PURPOSE
|
| 1404 |
|
|
* Complete the specified super block.
|
| 1405 |
|
|
*
|
| 1406 |
|
|
* PRE-CONDITIONS
|
| 1407 |
|
|
* sb Pointer to superblock to complete - never NULL.
|
| 1408 |
|
|
* sb->s_dev Device to read suberblock from.
|
| 1409 |
|
|
* options Pointer to mount options.
|
| 1410 |
|
|
* silent Silent flag.
|
| 1411 |
|
|
*
|
| 1412 |
|
|
* HISTORY
|
| 1413 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 1414 |
|
|
* Written, tested, and released.
|
| 1415 |
|
|
*/
|
| 1416 |
|
|
static int udf_fill_super(struct super_block *sb, void *options, int silent)
|
| 1417 |
|
|
{
|
| 1418 |
|
|
int i;
|
| 1419 |
|
|
struct inode *inode = NULL;
|
| 1420 |
|
|
struct udf_options uopt;
|
| 1421 |
|
|
kernel_lb_addr rootdir, fileset;
|
| 1422 |
|
|
struct udf_sb_info *sbi;
|
| 1423 |
|
|
|
| 1424 |
|
|
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
|
| 1425 |
|
|
uopt.uid = -1;
|
| 1426 |
|
|
uopt.gid = -1;
|
| 1427 |
|
|
uopt.umask = 0;
|
| 1428 |
|
|
|
| 1429 |
|
|
sbi = kmalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
|
| 1430 |
|
|
if (!sbi)
|
| 1431 |
|
|
return -ENOMEM;
|
| 1432 |
|
|
|
| 1433 |
|
|
sb->s_fs_info = sbi;
|
| 1434 |
|
|
memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info));
|
| 1435 |
|
|
|
| 1436 |
|
|
mutex_init(&sbi->s_alloc_mutex);
|
| 1437 |
|
|
|
| 1438 |
|
|
if (!udf_parse_options((char *)options, &uopt))
|
| 1439 |
|
|
goto error_out;
|
| 1440 |
|
|
|
| 1441 |
|
|
if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
|
| 1442 |
|
|
uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
|
| 1443 |
|
|
udf_error(sb, "udf_read_super",
|
| 1444 |
|
|
"utf8 cannot be combined with iocharset\n");
|
| 1445 |
|
|
goto error_out;
|
| 1446 |
|
|
}
|
| 1447 |
|
|
#ifdef CONFIG_UDF_NLS
|
| 1448 |
|
|
if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
|
| 1449 |
|
|
uopt.nls_map = load_nls_default();
|
| 1450 |
|
|
if (!uopt.nls_map)
|
| 1451 |
|
|
uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
|
| 1452 |
|
|
else
|
| 1453 |
|
|
udf_debug("Using default NLS map\n");
|
| 1454 |
|
|
}
|
| 1455 |
|
|
#endif
|
| 1456 |
|
|
if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
|
| 1457 |
|
|
uopt.flags |= (1 << UDF_FLAG_UTF8);
|
| 1458 |
|
|
|
| 1459 |
|
|
fileset.logicalBlockNum = 0xFFFFFFFF;
|
| 1460 |
|
|
fileset.partitionReferenceNum = 0xFFFF;
|
| 1461 |
|
|
|
| 1462 |
|
|
UDF_SB(sb)->s_flags = uopt.flags;
|
| 1463 |
|
|
UDF_SB(sb)->s_uid = uopt.uid;
|
| 1464 |
|
|
UDF_SB(sb)->s_gid = uopt.gid;
|
| 1465 |
|
|
UDF_SB(sb)->s_umask = uopt.umask;
|
| 1466 |
|
|
UDF_SB(sb)->s_nls_map = uopt.nls_map;
|
| 1467 |
|
|
|
| 1468 |
|
|
/* Set the block size for all transfers */
|
| 1469 |
|
|
if (!udf_set_blocksize(sb, uopt.blocksize))
|
| 1470 |
|
|
goto error_out;
|
| 1471 |
|
|
|
| 1472 |
|
|
if (uopt.session == 0xFFFFFFFF)
|
| 1473 |
|
|
UDF_SB_SESSION(sb) = udf_get_last_session(sb);
|
| 1474 |
|
|
else
|
| 1475 |
|
|
UDF_SB_SESSION(sb) = uopt.session;
|
| 1476 |
|
|
|
| 1477 |
|
|
udf_debug("Multi-session=%d\n", UDF_SB_SESSION(sb));
|
| 1478 |
|
|
|
| 1479 |
|
|
UDF_SB_LASTBLOCK(sb) = uopt.lastblock;
|
| 1480 |
|
|
UDF_SB_ANCHOR(sb)[0] = UDF_SB_ANCHOR(sb)[1] = 0;
|
| 1481 |
|
|
UDF_SB_ANCHOR(sb)[2] = uopt.anchor;
|
| 1482 |
|
|
UDF_SB_ANCHOR(sb)[3] = 256;
|
| 1483 |
|
|
|
| 1484 |
|
|
if (udf_check_valid(sb, uopt.novrs, silent)) { /* read volume recognition sequences */
|
| 1485 |
|
|
printk("UDF-fs: No VRS found\n");
|
| 1486 |
|
|
goto error_out;
|
| 1487 |
|
|
}
|
| 1488 |
|
|
|
| 1489 |
|
|
udf_find_anchor(sb);
|
| 1490 |
|
|
|
| 1491 |
|
|
/* Fill in the rest of the superblock */
|
| 1492 |
|
|
sb->s_op = &udf_sb_ops;
|
| 1493 |
|
|
sb->dq_op = NULL;
|
| 1494 |
|
|
sb->s_dirt = 0;
|
| 1495 |
|
|
sb->s_magic = UDF_SUPER_MAGIC;
|
| 1496 |
|
|
sb->s_time_gran = 1000;
|
| 1497 |
|
|
|
| 1498 |
|
|
if (udf_load_partition(sb, &fileset)) {
|
| 1499 |
|
|
printk("UDF-fs: No partition found (1)\n");
|
| 1500 |
|
|
goto error_out;
|
| 1501 |
|
|
}
|
| 1502 |
|
|
|
| 1503 |
|
|
udf_debug("Lastblock=%d\n", UDF_SB_LASTBLOCK(sb));
|
| 1504 |
|
|
|
| 1505 |
|
|
if (UDF_SB_LVIDBH(sb)) {
|
| 1506 |
|
|
uint16_t minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev);
|
| 1507 |
|
|
uint16_t minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev);
|
| 1508 |
|
|
/* uint16_t maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */
|
| 1509 |
|
|
|
| 1510 |
|
|
if (minUDFReadRev > UDF_MAX_READ_VERSION) {
|
| 1511 |
|
|
printk("UDF-fs: minUDFReadRev=%x (max is %x)\n",
|
| 1512 |
|
|
le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev),
|
| 1513 |
|
|
UDF_MAX_READ_VERSION);
|
| 1514 |
|
|
goto error_out;
|
| 1515 |
|
|
} else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) {
|
| 1516 |
|
|
sb->s_flags |= MS_RDONLY;
|
| 1517 |
|
|
}
|
| 1518 |
|
|
|
| 1519 |
|
|
UDF_SB_UDFREV(sb) = minUDFWriteRev;
|
| 1520 |
|
|
|
| 1521 |
|
|
if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
|
| 1522 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
|
| 1523 |
|
|
if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
|
| 1524 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
|
| 1525 |
|
|
}
|
| 1526 |
|
|
|
| 1527 |
|
|
if (!UDF_SB_NUMPARTS(sb)) {
|
| 1528 |
|
|
printk("UDF-fs: No partition found (2)\n");
|
| 1529 |
|
|
goto error_out;
|
| 1530 |
|
|
}
|
| 1531 |
|
|
|
| 1532 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_READ_ONLY) {
|
| 1533 |
|
|
printk("UDF-fs: Partition marked readonly; forcing readonly mount\n");
|
| 1534 |
|
|
sb->s_flags |= MS_RDONLY;
|
| 1535 |
|
|
}
|
| 1536 |
|
|
|
| 1537 |
|
|
if (udf_find_fileset(sb, &fileset, &rootdir)) {
|
| 1538 |
|
|
printk("UDF-fs: No fileset found\n");
|
| 1539 |
|
|
goto error_out;
|
| 1540 |
|
|
}
|
| 1541 |
|
|
|
| 1542 |
|
|
if (!silent) {
|
| 1543 |
|
|
kernel_timestamp ts;
|
| 1544 |
|
|
udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb));
|
| 1545 |
|
|
udf_info("UDF %s (%s) Mounting volume '%s', "
|
| 1546 |
|
|
"timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
|
| 1547 |
|
|
UDFFS_VERSION, UDFFS_DATE,
|
| 1548 |
|
|
UDF_SB_VOLIDENT(sb), ts.year, ts.month, ts.day, ts.hour, ts.minute,
|
| 1549 |
|
|
ts.typeAndTimezone);
|
| 1550 |
|
|
}
|
| 1551 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
| 1552 |
|
|
udf_open_lvid(sb);
|
| 1553 |
|
|
|
| 1554 |
|
|
/* Assign the root inode */
|
| 1555 |
|
|
/* assign inodes by physical block number */
|
| 1556 |
|
|
/* perhaps it's not extensible enough, but for now ... */
|
| 1557 |
|
|
inode = udf_iget(sb, rootdir);
|
| 1558 |
|
|
if (!inode) {
|
| 1559 |
|
|
printk("UDF-fs: Error in udf_iget, block=%d, partition=%d\n",
|
| 1560 |
|
|
rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
|
| 1561 |
|
|
goto error_out;
|
| 1562 |
|
|
}
|
| 1563 |
|
|
|
| 1564 |
|
|
/* Allocate a dentry for the root inode */
|
| 1565 |
|
|
sb->s_root = d_alloc_root(inode);
|
| 1566 |
|
|
if (!sb->s_root) {
|
| 1567 |
|
|
printk("UDF-fs: Couldn't allocate root dentry\n");
|
| 1568 |
|
|
iput(inode);
|
| 1569 |
|
|
goto error_out;
|
| 1570 |
|
|
}
|
| 1571 |
|
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
| 1572 |
|
|
return 0;
|
| 1573 |
|
|
|
| 1574 |
|
|
error_out:
|
| 1575 |
|
|
if (UDF_SB_VAT(sb))
|
| 1576 |
|
|
iput(UDF_SB_VAT(sb));
|
| 1577 |
|
|
if (UDF_SB_NUMPARTS(sb)) {
|
| 1578 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
|
| 1579 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
|
| 1580 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
|
| 1581 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
|
| 1582 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
|
| 1583 |
|
|
UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb), s_uspace);
|
| 1584 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
|
| 1585 |
|
|
UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb), s_fspace);
|
| 1586 |
|
|
if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) {
|
| 1587 |
|
|
for (i = 0; i < 4; i++)
|
| 1588 |
|
|
brelse(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
|
| 1589 |
|
|
}
|
| 1590 |
|
|
}
|
| 1591 |
|
|
#ifdef CONFIG_UDF_NLS
|
| 1592 |
|
|
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
| 1593 |
|
|
unload_nls(UDF_SB(sb)->s_nls_map);
|
| 1594 |
|
|
#endif
|
| 1595 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
| 1596 |
|
|
udf_close_lvid(sb);
|
| 1597 |
|
|
brelse(UDF_SB_LVIDBH(sb));
|
| 1598 |
|
|
UDF_SB_FREE(sb);
|
| 1599 |
|
|
kfree(sbi);
|
| 1600 |
|
|
sb->s_fs_info = NULL;
|
| 1601 |
|
|
|
| 1602 |
|
|
return -EINVAL;
|
| 1603 |
|
|
}
|
| 1604 |
|
|
|
| 1605 |
|
|
void udf_error(struct super_block *sb, const char *function,
|
| 1606 |
|
|
const char *fmt, ...)
|
| 1607 |
|
|
{
|
| 1608 |
|
|
va_list args;
|
| 1609 |
|
|
|
| 1610 |
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
| 1611 |
|
|
/* mark sb error */
|
| 1612 |
|
|
sb->s_dirt = 1;
|
| 1613 |
|
|
}
|
| 1614 |
|
|
va_start(args, fmt);
|
| 1615 |
|
|
vsnprintf(error_buf, sizeof(error_buf), fmt, args);
|
| 1616 |
|
|
va_end(args);
|
| 1617 |
|
|
printk (KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
|
| 1618 |
|
|
sb->s_id, function, error_buf);
|
| 1619 |
|
|
}
|
| 1620 |
|
|
|
| 1621 |
|
|
void udf_warning(struct super_block *sb, const char *function,
|
| 1622 |
|
|
const char *fmt, ...)
|
| 1623 |
|
|
{
|
| 1624 |
|
|
va_list args;
|
| 1625 |
|
|
|
| 1626 |
|
|
va_start(args, fmt);
|
| 1627 |
|
|
vsnprintf(error_buf, sizeof(error_buf), fmt, args);
|
| 1628 |
|
|
va_end(args);
|
| 1629 |
|
|
printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
|
| 1630 |
|
|
sb->s_id, function, error_buf);
|
| 1631 |
|
|
}
|
| 1632 |
|
|
|
| 1633 |
|
|
/*
|
| 1634 |
|
|
* udf_put_super
|
| 1635 |
|
|
*
|
| 1636 |
|
|
* PURPOSE
|
| 1637 |
|
|
* Prepare for destruction of the superblock.
|
| 1638 |
|
|
*
|
| 1639 |
|
|
* DESCRIPTION
|
| 1640 |
|
|
* Called before the filesystem is unmounted.
|
| 1641 |
|
|
*
|
| 1642 |
|
|
* HISTORY
|
| 1643 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 1644 |
|
|
* Written, tested, and released.
|
| 1645 |
|
|
*/
|
| 1646 |
|
|
static void udf_put_super(struct super_block *sb)
|
| 1647 |
|
|
{
|
| 1648 |
|
|
int i;
|
| 1649 |
|
|
|
| 1650 |
|
|
if (UDF_SB_VAT(sb))
|
| 1651 |
|
|
iput(UDF_SB_VAT(sb));
|
| 1652 |
|
|
if (UDF_SB_NUMPARTS(sb)) {
|
| 1653 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
|
| 1654 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
|
| 1655 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
|
| 1656 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
|
| 1657 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
|
| 1658 |
|
|
UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb), s_uspace);
|
| 1659 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
|
| 1660 |
|
|
UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb), s_fspace);
|
| 1661 |
|
|
if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) {
|
| 1662 |
|
|
for (i = 0; i < 4; i++)
|
| 1663 |
|
|
brelse(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
|
| 1664 |
|
|
}
|
| 1665 |
|
|
}
|
| 1666 |
|
|
#ifdef CONFIG_UDF_NLS
|
| 1667 |
|
|
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
| 1668 |
|
|
unload_nls(UDF_SB(sb)->s_nls_map);
|
| 1669 |
|
|
#endif
|
| 1670 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
| 1671 |
|
|
udf_close_lvid(sb);
|
| 1672 |
|
|
brelse(UDF_SB_LVIDBH(sb));
|
| 1673 |
|
|
UDF_SB_FREE(sb);
|
| 1674 |
|
|
kfree(sb->s_fs_info);
|
| 1675 |
|
|
sb->s_fs_info = NULL;
|
| 1676 |
|
|
}
|
| 1677 |
|
|
|
| 1678 |
|
|
/*
|
| 1679 |
|
|
* udf_stat_fs
|
| 1680 |
|
|
*
|
| 1681 |
|
|
* PURPOSE
|
| 1682 |
|
|
* Return info about the filesystem.
|
| 1683 |
|
|
*
|
| 1684 |
|
|
* DESCRIPTION
|
| 1685 |
|
|
* Called by sys_statfs()
|
| 1686 |
|
|
*
|
| 1687 |
|
|
* HISTORY
|
| 1688 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
| 1689 |
|
|
* Written, tested, and released.
|
| 1690 |
|
|
*/
|
| 1691 |
|
|
static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
|
| 1692 |
|
|
{
|
| 1693 |
|
|
struct super_block *sb = dentry->d_sb;
|
| 1694 |
|
|
|
| 1695 |
|
|
buf->f_type = UDF_SUPER_MAGIC;
|
| 1696 |
|
|
buf->f_bsize = sb->s_blocksize;
|
| 1697 |
|
|
buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
|
| 1698 |
|
|
buf->f_bfree = udf_count_free(sb);
|
| 1699 |
|
|
buf->f_bavail = buf->f_bfree;
|
| 1700 |
|
|
buf->f_files = (UDF_SB_LVIDBH(sb) ?
|
| 1701 |
|
|
(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) +
|
| 1702 |
|
|
le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree;
|
| 1703 |
|
|
buf->f_ffree = buf->f_bfree;
|
| 1704 |
|
|
/* __kernel_fsid_t f_fsid */
|
| 1705 |
|
|
buf->f_namelen = UDF_NAME_LEN - 2;
|
| 1706 |
|
|
|
| 1707 |
|
|
return 0;
|
| 1708 |
|
|
}
|
| 1709 |
|
|
|
| 1710 |
|
|
static unsigned char udf_bitmap_lookup[16] = {
|
| 1711 |
|
|
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
|
| 1712 |
|
|
};
|
| 1713 |
|
|
|
| 1714 |
|
|
static unsigned int udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap)
|
| 1715 |
|
|
{
|
| 1716 |
|
|
struct buffer_head *bh = NULL;
|
| 1717 |
|
|
unsigned int accum = 0;
|
| 1718 |
|
|
int index;
|
| 1719 |
|
|
int block = 0, newblock;
|
| 1720 |
|
|
kernel_lb_addr loc;
|
| 1721 |
|
|
uint32_t bytes;
|
| 1722 |
|
|
uint8_t value;
|
| 1723 |
|
|
uint8_t *ptr;
|
| 1724 |
|
|
uint16_t ident;
|
| 1725 |
|
|
struct spaceBitmapDesc *bm;
|
| 1726 |
|
|
|
| 1727 |
|
|
lock_kernel();
|
| 1728 |
|
|
|
| 1729 |
|
|
loc.logicalBlockNum = bitmap->s_extPosition;
|
| 1730 |
|
|
loc.partitionReferenceNum = UDF_SB_PARTITION(sb);
|
| 1731 |
|
|
bh = udf_read_ptagged(sb, loc, 0, &ident);
|
| 1732 |
|
|
|
| 1733 |
|
|
if (!bh) {
|
| 1734 |
|
|
printk(KERN_ERR "udf: udf_count_free failed\n");
|
| 1735 |
|
|
goto out;
|
| 1736 |
|
|
} else if (ident != TAG_IDENT_SBD) {
|
| 1737 |
|
|
brelse(bh);
|
| 1738 |
|
|
printk(KERN_ERR "udf: udf_count_free failed\n");
|
| 1739 |
|
|
goto out;
|
| 1740 |
|
|
}
|
| 1741 |
|
|
|
| 1742 |
|
|
bm = (struct spaceBitmapDesc *)bh->b_data;
|
| 1743 |
|
|
bytes = le32_to_cpu(bm->numOfBytes);
|
| 1744 |
|
|
index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
|
| 1745 |
|
|
ptr = (uint8_t *)bh->b_data;
|
| 1746 |
|
|
|
| 1747 |
|
|
while (bytes > 0) {
|
| 1748 |
|
|
while ((bytes > 0) && (index < sb->s_blocksize)) {
|
| 1749 |
|
|
value = ptr[index];
|
| 1750 |
|
|
accum += udf_bitmap_lookup[value & 0x0f];
|
| 1751 |
|
|
accum += udf_bitmap_lookup[value >> 4];
|
| 1752 |
|
|
index++;
|
| 1753 |
|
|
bytes--;
|
| 1754 |
|
|
}
|
| 1755 |
|
|
if (bytes) {
|
| 1756 |
|
|
brelse(bh);
|
| 1757 |
|
|
newblock = udf_get_lb_pblock(sb, loc, ++block);
|
| 1758 |
|
|
bh = udf_tread(sb, newblock);
|
| 1759 |
|
|
if (!bh) {
|
| 1760 |
|
|
udf_debug("read failed\n");
|
| 1761 |
|
|
goto out;
|
| 1762 |
|
|
}
|
| 1763 |
|
|
index = 0;
|
| 1764 |
|
|
ptr = (uint8_t *)bh->b_data;
|
| 1765 |
|
|
}
|
| 1766 |
|
|
}
|
| 1767 |
|
|
brelse(bh);
|
| 1768 |
|
|
|
| 1769 |
|
|
out:
|
| 1770 |
|
|
unlock_kernel();
|
| 1771 |
|
|
|
| 1772 |
|
|
return accum;
|
| 1773 |
|
|
}
|
| 1774 |
|
|
|
| 1775 |
|
|
static unsigned int udf_count_free_table(struct super_block *sb, struct inode *table)
|
| 1776 |
|
|
{
|
| 1777 |
|
|
unsigned int accum = 0;
|
| 1778 |
|
|
uint32_t elen;
|
| 1779 |
|
|
kernel_lb_addr eloc;
|
| 1780 |
|
|
int8_t etype;
|
| 1781 |
|
|
struct extent_position epos;
|
| 1782 |
|
|
|
| 1783 |
|
|
lock_kernel();
|
| 1784 |
|
|
|
| 1785 |
|
|
epos.block = UDF_I_LOCATION(table);
|
| 1786 |
|
|
epos.offset = sizeof(struct unallocSpaceEntry);
|
| 1787 |
|
|
epos.bh = NULL;
|
| 1788 |
|
|
|
| 1789 |
|
|
while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) {
|
| 1790 |
|
|
accum += (elen >> table->i_sb->s_blocksize_bits);
|
| 1791 |
|
|
}
|
| 1792 |
|
|
brelse(epos.bh);
|
| 1793 |
|
|
|
| 1794 |
|
|
unlock_kernel();
|
| 1795 |
|
|
|
| 1796 |
|
|
return accum;
|
| 1797 |
|
|
}
|
| 1798 |
|
|
|
| 1799 |
|
|
static unsigned int udf_count_free(struct super_block *sb)
|
| 1800 |
|
|
{
|
| 1801 |
|
|
unsigned int accum = 0;
|
| 1802 |
|
|
|
| 1803 |
|
|
if (UDF_SB_LVIDBH(sb)) {
|
| 1804 |
|
|
if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb)) {
|
| 1805 |
|
|
accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]);
|
| 1806 |
|
|
if (accum == 0xFFFFFFFF)
|
| 1807 |
|
|
accum = 0;
|
| 1808 |
|
|
}
|
| 1809 |
|
|
}
|
| 1810 |
|
|
|
| 1811 |
|
|
if (accum)
|
| 1812 |
|
|
return accum;
|
| 1813 |
|
|
|
| 1814 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) {
|
| 1815 |
|
|
accum += udf_count_free_bitmap(sb,
|
| 1816 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
|
| 1817 |
|
|
}
|
| 1818 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) {
|
| 1819 |
|
|
accum += udf_count_free_bitmap(sb,
|
| 1820 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
|
| 1821 |
|
|
}
|
| 1822 |
|
|
if (accum)
|
| 1823 |
|
|
return accum;
|
| 1824 |
|
|
|
| 1825 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) {
|
| 1826 |
|
|
accum += udf_count_free_table(sb,
|
| 1827 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
|
| 1828 |
|
|
}
|
| 1829 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) {
|
| 1830 |
|
|
accum += udf_count_free_table(sb,
|
| 1831 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
|
| 1832 |
|
|
}
|
| 1833 |
|
|
|
| 1834 |
|
|
return accum;
|
| 1835 |
|
|
}
|
