1 |
1275 |
phoenix |
/*
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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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* CONTACTS
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* E-mail regarding any portion of the Linux UDF file system should be
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* directed to the development team mailing list (run by majordomo):
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* linux_udf@hpesjro.fc.hp.com
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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) 1998-2001 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/config.h>
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#include <linux/version.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/locks.h>
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#include <linux/module.h>
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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 <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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#include <asm/uaccess.h>
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#define VDS_POS_PRIMARY_VOL_DESC 0
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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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#define VDS_POS_PARTITION_DESC 3
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#define VDS_POS_IMP_USE_VOL_DESC 4
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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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static char error_buf[1024];
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/* These are the "meat" - everything else is stuffing */
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static struct super_block *udf_read_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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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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static int udf_load_partition(struct super_block *, lb_addr *);
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static int udf_load_logicalvol(struct super_block *, struct buffer_head *, lb_addr *);
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static void udf_load_logicalvolint(struct super_block *, 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 *, lb_addr *, lb_addr *);
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static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
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static void udf_load_fileset(struct super_block *, struct buffer_head *, lb_addr *);
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static void 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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static unsigned int udf_count_free(struct super_block *);
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static int udf_statfs(struct super_block *, struct statfs *);
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/* UDF filesystem type */
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static DECLARE_FSTYPE_DEV(udf_fstype, "udf", udf_read_super);
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/* Superblock operations */
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static struct super_operations udf_sb_ops = {
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read_inode: udf_read_inode,
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write_inode: udf_write_inode,
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put_inode: udf_put_inode,
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delete_inode: udf_delete_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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struct udf_options
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{
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unsigned char novrs;
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unsigned int blocksize;
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unsigned int session;
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unsigned int lastblock;
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unsigned int anchor;
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unsigned int volume;
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unsigned short partition;
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unsigned int fileset;
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unsigned int rootdir;
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unsigned int flags;
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mode_t umask;
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gid_t gid;
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uid_t uid;
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struct nls_table *nls_map;
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};
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static int __init init_udf_fs(void)
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{
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printk(KERN_NOTICE "udf: registering filesystem\n");
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return register_filesystem(&udf_fstype);
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}
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static void __exit exit_udf_fs(void)
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{
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printk(KERN_NOTICE "udf: unregistering filesystem\n");
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unregister_filesystem(&udf_fstype);
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}
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EXPORT_NO_SYMBOLS;
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module_init(init_udf_fs)
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module_exit(exit_udf_fs)
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/*
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* udf_parse_options
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*
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* PURPOSE
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* Parse mount options.
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*
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* DESCRIPTION
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* The following mount options are supported:
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*
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* gid= Set the default group.
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* umask= Set the default umask.
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* uid= Set the default user.
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* bs= Set the block size.
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* unhide Show otherwise hidden files.
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* undelete Show deleted files in lists.
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* adinicb Embed data in the inode (default)
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* noadinicb Don't embed data in the inode
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* shortad Use short ad's
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* longad Use long ad's (default)
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* nostrict Unset strict conformance
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* iocharset= Set the NLS character set
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*
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* The remaining are for debugging and disaster recovery:
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*
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* novrs Skip volume sequence recognition
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*
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* The following expect a offset from 0.
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*
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* session= Set the CDROM session (default= last session)
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* anchor= Override standard anchor location. (default= 256)
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* volume= Override the VolumeDesc location. (unused)
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* partition= Override the PartitionDesc location. (unused)
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* lastblock= Set the last block of the filesystem/
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*
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* The following expect a offset from the partition root.
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*
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* fileset= Override the fileset block location. (unused)
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* rootdir= Override the root directory location. (unused)
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* WARNING: overriding the rootdir to a non-directory may
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* yield highly unpredictable results.
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*
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* PRE-CONDITIONS
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* options Pointer to mount options string.
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* uopts Pointer to mount options variable.
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*
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* POST-CONDITIONS
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* <return> 0 Mount options parsed okay.
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* <return> -1 Error parsing mount options.
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*
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* HISTORY
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* July 1, 1997 - Andrew E. Mileski
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* Written, tested, and released.
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*/
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static int
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udf_parse_options(char *options, struct udf_options *uopt)
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{
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char *opt, *val;
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uopt->novrs = 0;
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uopt->blocksize = 2048;
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uopt->partition = 0xFFFF;
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uopt->session = 0xFFFFFFFF;
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uopt->lastblock = 0;
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uopt->anchor = 0;
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uopt->volume = 0xFFFFFFFF;
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uopt->rootdir = 0xFFFFFFFF;
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uopt->fileset = 0xFFFFFFFF;
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uopt->nls_map = NULL;
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if (!options)
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return 1;
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for (opt = strtok(options, ","); opt; opt = strtok(NULL, ","))
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{
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/* Make "opt=val" into two strings */
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val = strchr(opt, '=');
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if (val)
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*(val++) = 0;
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if (!strcmp(opt, "novrs") && !val)
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uopt->novrs = 1;
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else if (!strcmp(opt, "bs") && val)
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uopt->blocksize = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "unhide") && !val)
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uopt->flags |= (1 << UDF_FLAG_UNHIDE);
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else if (!strcmp(opt, "undelete") && !val)
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uopt->flags |= (1 << UDF_FLAG_UNDELETE);
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else if (!strcmp(opt, "noadinicb") && !val)
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uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
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else if (!strcmp(opt, "adinicb") && !val)
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uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
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else if (!strcmp(opt, "shortad") && !val)
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uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
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else if (!strcmp(opt, "longad") && !val)
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uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
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else if (!strcmp(opt, "gid") && val)
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uopt->gid = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "umask") && val)
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uopt->umask = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "nostrict") && !val)
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uopt->flags &= ~(1 << UDF_FLAG_STRICT);
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else if (!strcmp(opt, "uid") && val)
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uopt->uid = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "session") && val)
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uopt->session = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "lastblock") && val)
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uopt->lastblock = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "anchor") && val)
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uopt->anchor = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "volume") && val)
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uopt->volume = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "partition") && val)
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uopt->partition = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "fileset") && val)
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uopt->fileset = simple_strtoul(val, NULL, 0);
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else if (!strcmp(opt, "rootdir") && val)
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uopt->rootdir = simple_strtoul(val, NULL, 0);
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#ifdef CONFIG_NLS
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else if (!strcmp(opt, "iocharset") && val)
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{
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uopt->nls_map = load_nls(val);
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uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
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}
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#endif
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else if (!strcmp(opt, "utf8") && !val)
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uopt->flags |= (1 << UDF_FLAG_UTF8);
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else if (val)
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{
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printk(KERN_ERR "udf: bad mount option \"%s=%s\"\n",
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opt, val);
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return 0;
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}
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280 |
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else
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{
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282 |
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printk(KERN_ERR "udf: bad mount option \"%s\"\n",
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opt);
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return 0;
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}
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286 |
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}
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287 |
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return 1;
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288 |
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}
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289 |
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290 |
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void
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291 |
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udf_write_super(struct super_block *sb)
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292 |
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{
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293 |
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if (!(sb->s_flags & MS_RDONLY))
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294 |
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udf_open_lvid(sb);
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sb->s_dirt = 0;
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296 |
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}
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297 |
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298 |
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static int
|
299 |
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udf_remount_fs(struct super_block *sb, int *flags, char *options)
|
300 |
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{
|
301 |
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struct udf_options uopt;
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302 |
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303 |
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uopt.flags = UDF_SB(sb)->s_flags ;
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304 |
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uopt.uid = UDF_SB(sb)->s_uid ;
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uopt.gid = UDF_SB(sb)->s_gid ;
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306 |
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uopt.umask = UDF_SB(sb)->s_umask ;
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307 |
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308 |
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if ( !udf_parse_options(options, &uopt) )
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309 |
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return -EINVAL;
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310 |
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311 |
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UDF_SB(sb)->s_flags = uopt.flags;
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UDF_SB(sb)->s_uid = uopt.uid;
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313 |
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UDF_SB(sb)->s_gid = uopt.gid;
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UDF_SB(sb)->s_umask = uopt.umask;
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315 |
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316 |
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#if UDFFS_RW != 1
|
317 |
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*flags |= MS_RDONLY;
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318 |
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#endif
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319 |
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320 |
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if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
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321 |
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return 0;
|
322 |
|
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if (*flags & MS_RDONLY)
|
323 |
|
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udf_close_lvid(sb);
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324 |
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else
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325 |
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udf_open_lvid(sb);
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326 |
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327 |
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return 0;
|
328 |
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}
|
329 |
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|
330 |
|
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/*
|
331 |
|
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* udf_set_blocksize
|
332 |
|
|
*
|
333 |
|
|
* PURPOSE
|
334 |
|
|
* Set the block size to be used in all transfers.
|
335 |
|
|
*
|
336 |
|
|
* DESCRIPTION
|
337 |
|
|
* To allow room for a DMA transfer, it is best to guess big when unsure.
|
338 |
|
|
* This routine picks 2048 bytes as the blocksize when guessing. This
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339 |
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* should be adequate until devices with larger block sizes become common.
|
340 |
|
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*
|
341 |
|
|
* Note that the Linux kernel can currently only deal with blocksizes of
|
342 |
|
|
* 512, 1024, 2048, 4096, and 8192 bytes.
|
343 |
|
|
*
|
344 |
|
|
* PRE-CONDITIONS
|
345 |
|
|
* sb Pointer to _locked_ superblock.
|
346 |
|
|
*
|
347 |
|
|
* POST-CONDITIONS
|
348 |
|
|
* sb->s_blocksize Blocksize.
|
349 |
|
|
* sb->s_blocksize_bits log2 of blocksize.
|
350 |
|
|
* <return> 0 Blocksize is valid.
|
351 |
|
|
* <return> 1 Blocksize is invalid.
|
352 |
|
|
*
|
353 |
|
|
* HISTORY
|
354 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
355 |
|
|
* Written, tested, and released.
|
356 |
|
|
*/
|
357 |
|
|
static int
|
358 |
|
|
udf_set_blocksize(struct super_block *sb, int bsize)
|
359 |
|
|
{
|
360 |
|
|
/* Use specified block size if specified */
|
361 |
|
|
if (bsize)
|
362 |
|
|
sb->s_blocksize = bsize;
|
363 |
|
|
if (get_hardsect_size(sb->s_dev) > sb->s_blocksize)
|
364 |
|
|
sb->s_blocksize = get_hardsect_size(sb->s_dev);
|
365 |
|
|
|
366 |
|
|
/* Block size must be an even multiple of 512 */
|
367 |
|
|
switch (sb->s_blocksize)
|
368 |
|
|
{
|
369 |
|
|
case 512: sb->s_blocksize_bits = 9; break;
|
370 |
|
|
case 1024: sb->s_blocksize_bits = 10; break;
|
371 |
|
|
case 2048: sb->s_blocksize_bits = 11; break;
|
372 |
|
|
case 4096: sb->s_blocksize_bits = 12; break;
|
373 |
|
|
case 8192: sb->s_blocksize_bits = 13; break;
|
374 |
|
|
default:
|
375 |
|
|
{
|
376 |
|
|
udf_debug("Bad block size (%ld)\n", sb->s_blocksize);
|
377 |
|
|
printk(KERN_ERR "udf: bad block size (%ld)\n", sb->s_blocksize);
|
378 |
|
|
return 0;
|
379 |
|
|
}
|
380 |
|
|
}
|
381 |
|
|
|
382 |
|
|
/* Set the block size */
|
383 |
|
|
set_blocksize(sb->s_dev, sb->s_blocksize);
|
384 |
|
|
return sb->s_blocksize;
|
385 |
|
|
}
|
386 |
|
|
|
387 |
|
|
static int
|
388 |
|
|
udf_vrs(struct super_block *sb, int silent)
|
389 |
|
|
{
|
390 |
|
|
struct volStructDesc *vsd = NULL;
|
391 |
|
|
int sector = 32768;
|
392 |
|
|
int sectorsize;
|
393 |
|
|
struct buffer_head *bh = NULL;
|
394 |
|
|
int iso9660=0;
|
395 |
|
|
int nsr02=0;
|
396 |
|
|
int nsr03=0;
|
397 |
|
|
|
398 |
|
|
/* Block size must be a multiple of 512 */
|
399 |
|
|
if (sb->s_blocksize & 511)
|
400 |
|
|
return 0;
|
401 |
|
|
|
402 |
|
|
if (sb->s_blocksize < sizeof(struct volStructDesc))
|
403 |
|
|
sectorsize = sizeof(struct volStructDesc);
|
404 |
|
|
else
|
405 |
|
|
sectorsize = sb->s_blocksize;
|
406 |
|
|
|
407 |
|
|
sector += (UDF_SB_SESSION(sb) << sb->s_blocksize_bits);
|
408 |
|
|
|
409 |
|
|
udf_debug("Starting at sector %u (%ld byte sectors)\n",
|
410 |
|
|
(sector >> sb->s_blocksize_bits), sb->s_blocksize);
|
411 |
|
|
/* Process the sequence (if applicable) */
|
412 |
|
|
for (;!nsr02 && !nsr03; sector += sectorsize)
|
413 |
|
|
{
|
414 |
|
|
/* Read a block */
|
415 |
|
|
bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
|
416 |
|
|
if (!bh)
|
417 |
|
|
break;
|
418 |
|
|
|
419 |
|
|
/* Look for ISO descriptors */
|
420 |
|
|
vsd = (struct volStructDesc *)(bh->b_data +
|
421 |
|
|
(sector & (sb->s_blocksize - 1)));
|
422 |
|
|
|
423 |
|
|
if (vsd->stdIdent[0] == 0)
|
424 |
|
|
{
|
425 |
|
|
udf_release_data(bh);
|
426 |
|
|
break;
|
427 |
|
|
}
|
428 |
|
|
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN))
|
429 |
|
|
{
|
430 |
|
|
iso9660 = sector;
|
431 |
|
|
switch (vsd->structType)
|
432 |
|
|
{
|
433 |
|
|
case 0:
|
434 |
|
|
udf_debug("ISO9660 Boot Record found\n");
|
435 |
|
|
break;
|
436 |
|
|
case 1:
|
437 |
|
|
udf_debug("ISO9660 Primary Volume Descriptor found\n");
|
438 |
|
|
break;
|
439 |
|
|
case 2:
|
440 |
|
|
udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
|
441 |
|
|
break;
|
442 |
|
|
case 3:
|
443 |
|
|
udf_debug("ISO9660 Volume Partition Descriptor found\n");
|
444 |
|
|
break;
|
445 |
|
|
case 255:
|
446 |
|
|
udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
|
447 |
|
|
break;
|
448 |
|
|
default:
|
449 |
|
|
udf_debug("ISO9660 VRS (%u) found\n", vsd->structType);
|
450 |
|
|
break;
|
451 |
|
|
}
|
452 |
|
|
}
|
453 |
|
|
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN))
|
454 |
|
|
{
|
455 |
|
|
}
|
456 |
|
|
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, VSD_STD_ID_LEN))
|
457 |
|
|
{
|
458 |
|
|
udf_release_data(bh);
|
459 |
|
|
break;
|
460 |
|
|
}
|
461 |
|
|
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN))
|
462 |
|
|
{
|
463 |
|
|
nsr02 = sector;
|
464 |
|
|
}
|
465 |
|
|
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN))
|
466 |
|
|
{
|
467 |
|
|
nsr03 = sector;
|
468 |
|
|
}
|
469 |
|
|
udf_release_data(bh);
|
470 |
|
|
}
|
471 |
|
|
|
472 |
|
|
if (nsr03)
|
473 |
|
|
return nsr03;
|
474 |
|
|
else if (nsr02)
|
475 |
|
|
return nsr02;
|
476 |
|
|
else if (sector - (UDF_SB_SESSION(sb) << sb->s_blocksize_bits) == 32768)
|
477 |
|
|
return -1;
|
478 |
|
|
else
|
479 |
|
|
return 0;
|
480 |
|
|
}
|
481 |
|
|
|
482 |
|
|
/*
|
483 |
|
|
* udf_find_anchor
|
484 |
|
|
*
|
485 |
|
|
* PURPOSE
|
486 |
|
|
* Find an anchor volume descriptor.
|
487 |
|
|
*
|
488 |
|
|
* PRE-CONDITIONS
|
489 |
|
|
* sb Pointer to _locked_ superblock.
|
490 |
|
|
* lastblock Last block on media.
|
491 |
|
|
*
|
492 |
|
|
* POST-CONDITIONS
|
493 |
|
|
* <return> 1 if not found, 0 if ok
|
494 |
|
|
*
|
495 |
|
|
* HISTORY
|
496 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
497 |
|
|
* Written, tested, and released.
|
498 |
|
|
*/
|
499 |
|
|
static void
|
500 |
|
|
udf_find_anchor(struct super_block *sb)
|
501 |
|
|
{
|
502 |
|
|
int lastblock = UDF_SB_LASTBLOCK(sb);
|
503 |
|
|
struct buffer_head *bh = NULL;
|
504 |
|
|
uint16_t ident;
|
505 |
|
|
uint32_t location;
|
506 |
|
|
int i;
|
507 |
|
|
|
508 |
|
|
if (lastblock)
|
509 |
|
|
{
|
510 |
|
|
int varlastblock = udf_variable_to_fixed(lastblock);
|
511 |
|
|
int last[] = { lastblock, lastblock - 2,
|
512 |
|
|
lastblock - 150, lastblock - 152,
|
513 |
|
|
varlastblock, varlastblock - 2,
|
514 |
|
|
varlastblock - 150, varlastblock - 152 };
|
515 |
|
|
|
516 |
|
|
lastblock = 0;
|
517 |
|
|
|
518 |
|
|
/* Search for an anchor volume descriptor pointer */
|
519 |
|
|
|
520 |
|
|
/* according to spec, anchor is in either:
|
521 |
|
|
* block 256
|
522 |
|
|
* lastblock-256
|
523 |
|
|
* lastblock
|
524 |
|
|
* however, if the disc isn't closed, it could be 512 */
|
525 |
|
|
|
526 |
|
|
for (i=0; (!lastblock && i<sizeof(last)/sizeof(int)); i++)
|
527 |
|
|
{
|
528 |
|
|
if (last[i] < 0 || !(bh = sb_bread(sb, last[i])))
|
529 |
|
|
{
|
530 |
|
|
ident = location = 0;
|
531 |
|
|
}
|
532 |
|
|
else
|
533 |
|
|
{
|
534 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
535 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
536 |
|
|
udf_release_data(bh);
|
537 |
|
|
}
|
538 |
|
|
|
539 |
|
|
if (ident == TAG_IDENT_AVDP)
|
540 |
|
|
{
|
541 |
|
|
if (location == last[i] - UDF_SB_SESSION(sb))
|
542 |
|
|
{
|
543 |
|
|
lastblock = UDF_SB_ANCHOR(sb)[0] = last[i];
|
544 |
|
|
UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
|
545 |
|
|
}
|
546 |
|
|
else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb))
|
547 |
|
|
{
|
548 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
549 |
|
|
lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]);
|
550 |
|
|
UDF_SB_ANCHOR(sb)[1] = lastblock - 256;
|
551 |
|
|
}
|
552 |
|
|
else
|
553 |
|
|
udf_debug("Anchor found at block %d, location mismatch %d.\n",
|
554 |
|
|
last[i], location);
|
555 |
|
|
}
|
556 |
|
|
else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE)
|
557 |
|
|
{
|
558 |
|
|
lastblock = last[i];
|
559 |
|
|
UDF_SB_ANCHOR(sb)[3] = 512 + UDF_SB_SESSION(sb);
|
560 |
|
|
}
|
561 |
|
|
else
|
562 |
|
|
{
|
563 |
|
|
if (last[i] < 256 || !(bh = sb_bread(sb, last[i] - 256)))
|
564 |
|
|
{
|
565 |
|
|
ident = location = 0;
|
566 |
|
|
}
|
567 |
|
|
else
|
568 |
|
|
{
|
569 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
570 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
571 |
|
|
udf_release_data(bh);
|
572 |
|
|
}
|
573 |
|
|
|
574 |
|
|
if (ident == TAG_IDENT_AVDP &&
|
575 |
|
|
location == last[i] - 256 - UDF_SB_SESSION(sb))
|
576 |
|
|
{
|
577 |
|
|
lastblock = last[i];
|
578 |
|
|
UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
|
579 |
|
|
}
|
580 |
|
|
else
|
581 |
|
|
{
|
582 |
|
|
if (last[i] < 312 + UDF_SB_SESSION(sb) || !(bh = sb_bread(sb, last[i] - 312 - UDF_SB_SESSION(sb))))
|
583 |
|
|
{
|
584 |
|
|
ident = location = 0;
|
585 |
|
|
}
|
586 |
|
|
else
|
587 |
|
|
{
|
588 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
589 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
590 |
|
|
udf_release_data(bh);
|
591 |
|
|
}
|
592 |
|
|
|
593 |
|
|
if (ident == TAG_IDENT_AVDP &&
|
594 |
|
|
location == udf_variable_to_fixed(last[i]) - 256)
|
595 |
|
|
{
|
596 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
597 |
|
|
lastblock = udf_variable_to_fixed(last[i]);
|
598 |
|
|
UDF_SB_ANCHOR(sb)[1] = lastblock - 256;
|
599 |
|
|
}
|
600 |
|
|
}
|
601 |
|
|
}
|
602 |
|
|
}
|
603 |
|
|
}
|
604 |
|
|
|
605 |
|
|
if (!lastblock)
|
606 |
|
|
{
|
607 |
|
|
/* We havn't found the lastblock. check 312 */
|
608 |
|
|
if ((bh = sb_bread(sb, 312 + UDF_SB_SESSION(sb))))
|
609 |
|
|
{
|
610 |
|
|
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
|
611 |
|
|
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
|
612 |
|
|
udf_release_data(bh);
|
613 |
|
|
|
614 |
|
|
if (ident == TAG_IDENT_AVDP && location == 256)
|
615 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
616 |
|
|
}
|
617 |
|
|
}
|
618 |
|
|
|
619 |
|
|
for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
|
620 |
|
|
{
|
621 |
|
|
if (UDF_SB_ANCHOR(sb)[i])
|
622 |
|
|
{
|
623 |
|
|
if (!(bh = udf_read_tagged(sb,
|
624 |
|
|
UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident)))
|
625 |
|
|
{
|
626 |
|
|
UDF_SB_ANCHOR(sb)[i] = 0;
|
627 |
|
|
}
|
628 |
|
|
else
|
629 |
|
|
{
|
630 |
|
|
udf_release_data(bh);
|
631 |
|
|
if ((ident != TAG_IDENT_AVDP) && (i ||
|
632 |
|
|
(ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE)))
|
633 |
|
|
{
|
634 |
|
|
UDF_SB_ANCHOR(sb)[i] = 0;
|
635 |
|
|
}
|
636 |
|
|
}
|
637 |
|
|
}
|
638 |
|
|
}
|
639 |
|
|
|
640 |
|
|
UDF_SB_LASTBLOCK(sb) = lastblock;
|
641 |
|
|
}
|
642 |
|
|
|
643 |
|
|
static int
|
644 |
|
|
udf_find_fileset(struct super_block *sb, lb_addr *fileset, lb_addr *root)
|
645 |
|
|
{
|
646 |
|
|
struct buffer_head *bh = NULL;
|
647 |
|
|
long lastblock;
|
648 |
|
|
uint16_t ident;
|
649 |
|
|
|
650 |
|
|
if (fileset->logicalBlockNum != 0xFFFFFFFF ||
|
651 |
|
|
fileset->partitionReferenceNum != 0xFFFF)
|
652 |
|
|
{
|
653 |
|
|
bh = udf_read_ptagged(sb, *fileset, 0, &ident);
|
654 |
|
|
|
655 |
|
|
if (!bh)
|
656 |
|
|
return 1;
|
657 |
|
|
else if (ident != TAG_IDENT_FSD)
|
658 |
|
|
{
|
659 |
|
|
udf_release_data(bh);
|
660 |
|
|
return 1;
|
661 |
|
|
}
|
662 |
|
|
|
663 |
|
|
}
|
664 |
|
|
|
665 |
|
|
if (!bh) /* Search backwards through the partitions */
|
666 |
|
|
{
|
667 |
|
|
lb_addr newfileset;
|
668 |
|
|
|
669 |
|
|
return 1;
|
670 |
|
|
|
671 |
|
|
for (newfileset.partitionReferenceNum=UDF_SB_NUMPARTS(sb)-1;
|
672 |
|
|
(newfileset.partitionReferenceNum != 0xFFFF &&
|
673 |
|
|
fileset->logicalBlockNum == 0xFFFFFFFF &&
|
674 |
|
|
fileset->partitionReferenceNum == 0xFFFF);
|
675 |
|
|
newfileset.partitionReferenceNum--)
|
676 |
|
|
{
|
677 |
|
|
lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum);
|
678 |
|
|
newfileset.logicalBlockNum = 0;
|
679 |
|
|
|
680 |
|
|
do
|
681 |
|
|
{
|
682 |
|
|
bh = udf_read_ptagged(sb, newfileset, 0, &ident);
|
683 |
|
|
if (!bh)
|
684 |
|
|
{
|
685 |
|
|
newfileset.logicalBlockNum ++;
|
686 |
|
|
continue;
|
687 |
|
|
}
|
688 |
|
|
|
689 |
|
|
switch (ident)
|
690 |
|
|
{
|
691 |
|
|
case TAG_IDENT_SBD:
|
692 |
|
|
{
|
693 |
|
|
struct spaceBitmapDesc *sp;
|
694 |
|
|
sp = (struct spaceBitmapDesc *)bh->b_data;
|
695 |
|
|
newfileset.logicalBlockNum += 1 +
|
696 |
|
|
((le32_to_cpu(sp->numOfBytes) + sizeof(struct spaceBitmapDesc) - 1)
|
697 |
|
|
>> sb->s_blocksize_bits);
|
698 |
|
|
udf_release_data(bh);
|
699 |
|
|
break;
|
700 |
|
|
}
|
701 |
|
|
case TAG_IDENT_FSD:
|
702 |
|
|
{
|
703 |
|
|
*fileset = newfileset;
|
704 |
|
|
break;
|
705 |
|
|
}
|
706 |
|
|
default:
|
707 |
|
|
{
|
708 |
|
|
newfileset.logicalBlockNum ++;
|
709 |
|
|
udf_release_data(bh);
|
710 |
|
|
bh = NULL;
|
711 |
|
|
break;
|
712 |
|
|
}
|
713 |
|
|
}
|
714 |
|
|
}
|
715 |
|
|
while (newfileset.logicalBlockNum < lastblock &&
|
716 |
|
|
fileset->logicalBlockNum == 0xFFFFFFFF &&
|
717 |
|
|
fileset->partitionReferenceNum == 0xFFFF);
|
718 |
|
|
}
|
719 |
|
|
}
|
720 |
|
|
|
721 |
|
|
if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
|
722 |
|
|
fileset->partitionReferenceNum != 0xFFFF) && bh)
|
723 |
|
|
{
|
724 |
|
|
udf_debug("Fileset at block=%d, partition=%d\n",
|
725 |
|
|
fileset->logicalBlockNum, fileset->partitionReferenceNum);
|
726 |
|
|
|
727 |
|
|
UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum;
|
728 |
|
|
udf_load_fileset(sb, bh, root);
|
729 |
|
|
udf_release_data(bh);
|
730 |
|
|
return 0;
|
731 |
|
|
}
|
732 |
|
|
return 1;
|
733 |
|
|
}
|
734 |
|
|
|
735 |
|
|
static void
|
736 |
|
|
udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
|
737 |
|
|
{
|
738 |
|
|
struct primaryVolDesc *pvoldesc;
|
739 |
|
|
time_t recording;
|
740 |
|
|
long recording_usec;
|
741 |
|
|
struct ustr instr;
|
742 |
|
|
struct ustr outstr;
|
743 |
|
|
|
744 |
|
|
pvoldesc = (struct primaryVolDesc *)bh->b_data;
|
745 |
|
|
|
746 |
|
|
if ( udf_stamp_to_time(&recording, &recording_usec,
|
747 |
|
|
lets_to_cpu(pvoldesc->recordingDateAndTime)) )
|
748 |
|
|
{
|
749 |
|
|
timestamp ts;
|
750 |
|
|
ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
|
751 |
|
|
udf_debug("recording time %ld/%ld, %04u/%02u/%02u %02u:%02u (%x)\n",
|
752 |
|
|
recording, recording_usec,
|
753 |
|
|
ts.year, ts.month, ts.day, ts.hour, ts.minute, ts.typeAndTimezone);
|
754 |
|
|
UDF_SB_RECORDTIME(sb) = recording;
|
755 |
|
|
}
|
756 |
|
|
|
757 |
|
|
if ( !udf_build_ustr(&instr, pvoldesc->volIdent, 32) )
|
758 |
|
|
{
|
759 |
|
|
if (udf_CS0toUTF8(&outstr, &instr))
|
760 |
|
|
{
|
761 |
|
|
strncpy( UDF_SB_VOLIDENT(sb), outstr.u_name,
|
762 |
|
|
outstr.u_len > 31 ? 31 : outstr.u_len);
|
763 |
|
|
udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb));
|
764 |
|
|
}
|
765 |
|
|
}
|
766 |
|
|
|
767 |
|
|
if ( !udf_build_ustr(&instr, pvoldesc->volSetIdent, 128) )
|
768 |
|
|
{
|
769 |
|
|
if (udf_CS0toUTF8(&outstr, &instr))
|
770 |
|
|
udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
|
771 |
|
|
}
|
772 |
|
|
}
|
773 |
|
|
|
774 |
|
|
static void
|
775 |
|
|
udf_load_fileset(struct super_block *sb, struct buffer_head *bh, lb_addr *root)
|
776 |
|
|
{
|
777 |
|
|
struct fileSetDesc *fset;
|
778 |
|
|
|
779 |
|
|
fset = (struct fileSetDesc *)bh->b_data;
|
780 |
|
|
|
781 |
|
|
*root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
|
782 |
|
|
|
783 |
|
|
UDF_SB_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum);
|
784 |
|
|
|
785 |
|
|
udf_debug("Rootdir at block=%d, partition=%d\n",
|
786 |
|
|
root->logicalBlockNum, root->partitionReferenceNum);
|
787 |
|
|
}
|
788 |
|
|
|
789 |
|
|
static void
|
790 |
|
|
udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
|
791 |
|
|
{
|
792 |
|
|
struct partitionDesc *p;
|
793 |
|
|
int i;
|
794 |
|
|
|
795 |
|
|
p = (struct partitionDesc *)bh->b_data;
|
796 |
|
|
|
797 |
|
|
for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
|
798 |
|
|
{
|
799 |
|
|
udf_debug("Searching map: (%d == %d)\n",
|
800 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber));
|
801 |
|
|
if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber))
|
802 |
|
|
{
|
803 |
|
|
UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */
|
804 |
|
|
UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation) + UDF_SB_SESSION(sb);
|
805 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY)
|
806 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_READ_ONLY;
|
807 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE)
|
808 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_WRITE_ONCE;
|
809 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE)
|
810 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_REWRITABLE;
|
811 |
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE)
|
812 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_OVERWRITABLE;
|
813 |
|
|
|
814 |
|
|
if (!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) ||
|
815 |
|
|
!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
|
816 |
|
|
{
|
817 |
|
|
struct partitionHeaderDesc *phd;
|
818 |
|
|
|
819 |
|
|
phd = (struct partitionHeaderDesc *)(p->partitionContentsUse);
|
820 |
|
|
if (phd->unallocSpaceTable.extLength)
|
821 |
|
|
{
|
822 |
|
|
lb_addr loc = { le32_to_cpu(phd->unallocSpaceTable.extPosition), i };
|
823 |
|
|
|
824 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table =
|
825 |
|
|
udf_iget(sb, loc);
|
826 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_TABLE;
|
827 |
|
|
udf_debug("unallocSpaceTable (part %d) @ %ld\n",
|
828 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino);
|
829 |
|
|
}
|
830 |
|
|
if (phd->unallocSpaceBitmap.extLength)
|
831 |
|
|
{
|
832 |
|
|
UDF_SB_ALLOC_BITMAP(sb, i, s_uspace);
|
833 |
|
|
if (UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap != NULL)
|
834 |
|
|
{
|
835 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extLength =
|
836 |
|
|
le32_to_cpu(phd->unallocSpaceBitmap.extLength);
|
837 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition =
|
838 |
|
|
le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
|
839 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP;
|
840 |
|
|
udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
|
841 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition);
|
842 |
|
|
}
|
843 |
|
|
}
|
844 |
|
|
if (phd->partitionIntegrityTable.extLength)
|
845 |
|
|
udf_debug("partitionIntegrityTable (part %d)\n", i);
|
846 |
|
|
if (phd->freedSpaceTable.extLength)
|
847 |
|
|
{
|
848 |
|
|
lb_addr loc = { le32_to_cpu(phd->freedSpaceTable.extPosition), i };
|
849 |
|
|
|
850 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table =
|
851 |
|
|
udf_iget(sb, loc);
|
852 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_TABLE;
|
853 |
|
|
udf_debug("freedSpaceTable (part %d) @ %ld\n",
|
854 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table->i_ino);
|
855 |
|
|
}
|
856 |
|
|
if (phd->freedSpaceBitmap.extLength)
|
857 |
|
|
{
|
858 |
|
|
UDF_SB_ALLOC_BITMAP(sb, i, s_fspace);
|
859 |
|
|
if (UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap != NULL)
|
860 |
|
|
{
|
861 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extLength =
|
862 |
|
|
le32_to_cpu(phd->freedSpaceBitmap.extLength);
|
863 |
|
|
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition =
|
864 |
|
|
le32_to_cpu(phd->freedSpaceBitmap.extPosition);
|
865 |
|
|
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP;
|
866 |
|
|
udf_debug("freedSpaceBitmap (part %d) @ %d\n",
|
867 |
|
|
i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition);
|
868 |
|
|
}
|
869 |
|
|
}
|
870 |
|
|
}
|
871 |
|
|
break;
|
872 |
|
|
}
|
873 |
|
|
}
|
874 |
|
|
if (i == UDF_SB_NUMPARTS(sb))
|
875 |
|
|
{
|
876 |
|
|
udf_debug("Partition (%d) not found in partition map\n", le16_to_cpu(p->partitionNumber));
|
877 |
|
|
}
|
878 |
|
|
else
|
879 |
|
|
{
|
880 |
|
|
udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %d\n",
|
881 |
|
|
le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i),
|
882 |
|
|
UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i));
|
883 |
|
|
}
|
884 |
|
|
}
|
885 |
|
|
|
886 |
|
|
static int
|
887 |
|
|
udf_load_logicalvol(struct super_block *sb, struct buffer_head * bh, lb_addr *fileset)
|
888 |
|
|
{
|
889 |
|
|
struct logicalVolDesc *lvd;
|
890 |
|
|
int i, j, offset;
|
891 |
|
|
uint8_t type;
|
892 |
|
|
|
893 |
|
|
lvd = (struct logicalVolDesc *)bh->b_data;
|
894 |
|
|
|
895 |
|
|
UDF_SB_ALLOC_PARTMAPS(sb, le32_to_cpu(lvd->numPartitionMaps));
|
896 |
|
|
|
897 |
|
|
for (i=0,offset=0;
|
898 |
|
|
i<UDF_SB_NUMPARTS(sb) && offset<le32_to_cpu(lvd->mapTableLength);
|
899 |
|
|
i++,offset+=((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength)
|
900 |
|
|
{
|
901 |
|
|
type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType;
|
902 |
|
|
if (type == 1)
|
903 |
|
|
{
|
904 |
|
|
struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]);
|
905 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15;
|
906 |
|
|
UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum);
|
907 |
|
|
UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum);
|
908 |
|
|
UDF_SB_PARTFUNC(sb,i) = NULL;
|
909 |
|
|
}
|
910 |
|
|
else if (type == 2)
|
911 |
|
|
{
|
912 |
|
|
struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]);
|
913 |
|
|
if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL)))
|
914 |
|
|
{
|
915 |
|
|
if (le16_to_cpu(((uint16_t *)upm2->partIdent.identSuffix)[0]) == 0x0150)
|
916 |
|
|
{
|
917 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15;
|
918 |
|
|
UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15;
|
919 |
|
|
}
|
920 |
|
|
else if (le16_to_cpu(((uint16_t *)upm2->partIdent.identSuffix)[0]) == 0x0200)
|
921 |
|
|
{
|
922 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20;
|
923 |
|
|
UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20;
|
924 |
|
|
}
|
925 |
|
|
}
|
926 |
|
|
else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE)))
|
927 |
|
|
{
|
928 |
|
|
uint32_t loc;
|
929 |
|
|
uint16_t ident;
|
930 |
|
|
struct sparingTable *st;
|
931 |
|
|
struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]);
|
932 |
|
|
|
933 |
|
|
UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15;
|
934 |
|
|
UDF_SB_TYPESPAR(sb,i).s_packet_len = le16_to_cpu(spm->packetLength);
|
935 |
|
|
for (j=0; j<spm->numSparingTables; j++)
|
936 |
|
|
{
|
937 |
|
|
loc = le32_to_cpu(spm->locSparingTable[j]);
|
938 |
|
|
UDF_SB_TYPESPAR(sb,i).s_spar_map[j] =
|
939 |
|
|
udf_read_tagged(sb, loc, loc, &ident);
|
940 |
|
|
if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL)
|
941 |
|
|
{
|
942 |
|
|
st = (struct sparingTable *)UDF_SB_TYPESPAR(sb,i).s_spar_map[j]->b_data;
|
943 |
|
|
if (ident != 0 ||
|
944 |
|
|
strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING)))
|
945 |
|
|
{
|
946 |
|
|
udf_release_data(UDF_SB_TYPESPAR(sb,i).s_spar_map[j]);
|
947 |
|
|
UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = NULL;
|
948 |
|
|
}
|
949 |
|
|
}
|
950 |
|
|
}
|
951 |
|
|
UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15;
|
952 |
|
|
}
|
953 |
|
|
else
|
954 |
|
|
{
|
955 |
|
|
udf_debug("Unknown ident: %s\n", upm2->partIdent.ident);
|
956 |
|
|
continue;
|
957 |
|
|
}
|
958 |
|
|
UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum);
|
959 |
|
|
UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum);
|
960 |
|
|
}
|
961 |
|
|
udf_debug("Partition (%d:%d) type %d on volume %d\n",
|
962 |
|
|
i, UDF_SB_PARTNUM(sb,i), type, UDF_SB_PARTVSN(sb,i));
|
963 |
|
|
}
|
964 |
|
|
|
965 |
|
|
if (fileset)
|
966 |
|
|
{
|
967 |
|
|
long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
|
968 |
|
|
|
969 |
|
|
*fileset = lelb_to_cpu(la->extLocation);
|
970 |
|
|
udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
|
971 |
|
|
fileset->logicalBlockNum,
|
972 |
|
|
fileset->partitionReferenceNum);
|
973 |
|
|
}
|
974 |
|
|
if (lvd->integritySeqExt.extLength)
|
975 |
|
|
udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
|
976 |
|
|
return 0;
|
977 |
|
|
}
|
978 |
|
|
|
979 |
|
|
/*
|
980 |
|
|
* udf_load_logicalvolint
|
981 |
|
|
*
|
982 |
|
|
*/
|
983 |
|
|
static void
|
984 |
|
|
udf_load_logicalvolint(struct super_block *sb, extent_ad loc)
|
985 |
|
|
{
|
986 |
|
|
struct buffer_head *bh = NULL;
|
987 |
|
|
uint16_t ident;
|
988 |
|
|
|
989 |
|
|
while (loc.extLength > 0 &&
|
990 |
|
|
(bh = udf_read_tagged(sb, loc.extLocation,
|
991 |
|
|
loc.extLocation, &ident)) &&
|
992 |
|
|
ident == TAG_IDENT_LVID)
|
993 |
|
|
{
|
994 |
|
|
UDF_SB_LVIDBH(sb) = bh;
|
995 |
|
|
|
996 |
|
|
if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength)
|
997 |
|
|
udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt));
|
998 |
|
|
|
999 |
|
|
if (UDF_SB_LVIDBH(sb) != bh)
|
1000 |
|
|
udf_release_data(bh);
|
1001 |
|
|
loc.extLength -= sb->s_blocksize;
|
1002 |
|
|
loc.extLocation ++;
|
1003 |
|
|
}
|
1004 |
|
|
if (UDF_SB_LVIDBH(sb) != bh)
|
1005 |
|
|
udf_release_data(bh);
|
1006 |
|
|
}
|
1007 |
|
|
|
1008 |
|
|
/*
|
1009 |
|
|
* udf_process_sequence
|
1010 |
|
|
*
|
1011 |
|
|
* PURPOSE
|
1012 |
|
|
* Process a main/reserve volume descriptor sequence.
|
1013 |
|
|
*
|
1014 |
|
|
* PRE-CONDITIONS
|
1015 |
|
|
* sb Pointer to _locked_ superblock.
|
1016 |
|
|
* block First block of first extent of the sequence.
|
1017 |
|
|
* lastblock Lastblock of first extent of the sequence.
|
1018 |
|
|
*
|
1019 |
|
|
* HISTORY
|
1020 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
1021 |
|
|
* Written, tested, and released.
|
1022 |
|
|
*/
|
1023 |
|
|
static int
|
1024 |
|
|
udf_process_sequence(struct super_block *sb, long block, long lastblock, lb_addr *fileset)
|
1025 |
|
|
{
|
1026 |
|
|
struct buffer_head *bh = NULL;
|
1027 |
|
|
struct udf_vds_record vds[VDS_POS_LENGTH];
|
1028 |
|
|
struct generic_desc *gd;
|
1029 |
|
|
struct volDescPtr *vdp;
|
1030 |
|
|
int done=0;
|
1031 |
|
|
int i,j;
|
1032 |
|
|
uint32_t vdsn;
|
1033 |
|
|
uint16_t ident;
|
1034 |
|
|
long next_s = 0, next_e = 0;
|
1035 |
|
|
|
1036 |
|
|
memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
|
1037 |
|
|
|
1038 |
|
|
/* Read the main descriptor sequence */
|
1039 |
|
|
for (;(!done && block <= lastblock); block++)
|
1040 |
|
|
{
|
1041 |
|
|
|
1042 |
|
|
bh = udf_read_tagged(sb, block, block, &ident);
|
1043 |
|
|
if (!bh)
|
1044 |
|
|
break;
|
1045 |
|
|
|
1046 |
|
|
/* Process each descriptor (ISO 13346 3/8.3-8.4) */
|
1047 |
|
|
gd = (struct generic_desc *)bh->b_data;
|
1048 |
|
|
vdsn = le32_to_cpu(gd->volDescSeqNum);
|
1049 |
|
|
switch (ident)
|
1050 |
|
|
{
|
1051 |
|
|
case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
|
1052 |
|
|
if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum)
|
1053 |
|
|
{
|
1054 |
|
|
vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn;
|
1055 |
|
|
vds[VDS_POS_PRIMARY_VOL_DESC].block = block;
|
1056 |
|
|
}
|
1057 |
|
|
break;
|
1058 |
|
|
case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
|
1059 |
|
|
if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum)
|
1060 |
|
|
{
|
1061 |
|
|
vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn;
|
1062 |
|
|
vds[VDS_POS_VOL_DESC_PTR].block = block;
|
1063 |
|
|
|
1064 |
|
|
vdp = (struct volDescPtr *)bh->b_data;
|
1065 |
|
|
next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
|
1066 |
|
|
next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength);
|
1067 |
|
|
next_e = next_e >> sb->s_blocksize_bits;
|
1068 |
|
|
next_e += next_s;
|
1069 |
|
|
}
|
1070 |
|
|
break;
|
1071 |
|
|
case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
|
1072 |
|
|
if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum)
|
1073 |
|
|
{
|
1074 |
|
|
vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn;
|
1075 |
|
|
vds[VDS_POS_IMP_USE_VOL_DESC].block = block;
|
1076 |
|
|
}
|
1077 |
|
|
break;
|
1078 |
|
|
case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
|
1079 |
|
|
if (!vds[VDS_POS_PARTITION_DESC].block)
|
1080 |
|
|
vds[VDS_POS_PARTITION_DESC].block = block;
|
1081 |
|
|
break;
|
1082 |
|
|
case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
|
1083 |
|
|
if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum)
|
1084 |
|
|
{
|
1085 |
|
|
vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn;
|
1086 |
|
|
vds[VDS_POS_LOGICAL_VOL_DESC].block = block;
|
1087 |
|
|
}
|
1088 |
|
|
break;
|
1089 |
|
|
case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
|
1090 |
|
|
if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum)
|
1091 |
|
|
{
|
1092 |
|
|
vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn;
|
1093 |
|
|
vds[VDS_POS_UNALLOC_SPACE_DESC].block = block;
|
1094 |
|
|
}
|
1095 |
|
|
break;
|
1096 |
|
|
case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
|
1097 |
|
|
vds[VDS_POS_TERMINATING_DESC].block = block;
|
1098 |
|
|
if (next_e)
|
1099 |
|
|
{
|
1100 |
|
|
block = next_s;
|
1101 |
|
|
lastblock = next_e;
|
1102 |
|
|
next_s = next_e = 0;
|
1103 |
|
|
}
|
1104 |
|
|
else
|
1105 |
|
|
done = 1;
|
1106 |
|
|
break;
|
1107 |
|
|
}
|
1108 |
|
|
udf_release_data(bh);
|
1109 |
|
|
}
|
1110 |
|
|
for (i=0; i<VDS_POS_LENGTH; i++)
|
1111 |
|
|
{
|
1112 |
|
|
if (vds[i].block)
|
1113 |
|
|
{
|
1114 |
|
|
bh = udf_read_tagged(sb, vds[i].block, vds[i].block, &ident);
|
1115 |
|
|
|
1116 |
|
|
if (i == VDS_POS_PRIMARY_VOL_DESC)
|
1117 |
|
|
udf_load_pvoldesc(sb, bh);
|
1118 |
|
|
else if (i == VDS_POS_LOGICAL_VOL_DESC)
|
1119 |
|
|
udf_load_logicalvol(sb, bh, fileset);
|
1120 |
|
|
else if (i == VDS_POS_PARTITION_DESC)
|
1121 |
|
|
{
|
1122 |
|
|
struct buffer_head *bh2 = NULL;
|
1123 |
|
|
udf_load_partdesc(sb, bh);
|
1124 |
|
|
for (j=vds[i].block+1; j<vds[VDS_POS_TERMINATING_DESC].block; j++)
|
1125 |
|
|
{
|
1126 |
|
|
bh2 = udf_read_tagged(sb, j, j, &ident);
|
1127 |
|
|
gd = (struct generic_desc *)bh2->b_data;
|
1128 |
|
|
if (ident == TAG_IDENT_PD)
|
1129 |
|
|
udf_load_partdesc(sb, bh2);
|
1130 |
|
|
udf_release_data(bh2);
|
1131 |
|
|
}
|
1132 |
|
|
}
|
1133 |
|
|
udf_release_data(bh);
|
1134 |
|
|
}
|
1135 |
|
|
}
|
1136 |
|
|
|
1137 |
|
|
return 0;
|
1138 |
|
|
}
|
1139 |
|
|
|
1140 |
|
|
/*
|
1141 |
|
|
* udf_check_valid()
|
1142 |
|
|
*/
|
1143 |
|
|
static int
|
1144 |
|
|
udf_check_valid(struct super_block *sb, int novrs, int silent)
|
1145 |
|
|
{
|
1146 |
|
|
long block;
|
1147 |
|
|
|
1148 |
|
|
if (novrs)
|
1149 |
|
|
{
|
1150 |
|
|
udf_debug("Validity check skipped because of novrs option\n");
|
1151 |
|
|
return 0;
|
1152 |
|
|
}
|
1153 |
|
|
/* Check that it is NSR02 compliant */
|
1154 |
|
|
/* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
|
1155 |
|
|
else if ((block = udf_vrs(sb, silent)) == -1)
|
1156 |
|
|
{
|
1157 |
|
|
udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
|
1158 |
|
|
if (!UDF_SB_LASTBLOCK(sb))
|
1159 |
|
|
UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
|
1160 |
|
|
return 0;
|
1161 |
|
|
}
|
1162 |
|
|
else
|
1163 |
|
|
return !block;
|
1164 |
|
|
}
|
1165 |
|
|
|
1166 |
|
|
static int
|
1167 |
|
|
udf_load_partition(struct super_block *sb, lb_addr *fileset)
|
1168 |
|
|
{
|
1169 |
|
|
struct anchorVolDescPtr *anchor;
|
1170 |
|
|
uint16_t ident;
|
1171 |
|
|
struct buffer_head *bh;
|
1172 |
|
|
long main_s, main_e, reserve_s, reserve_e;
|
1173 |
|
|
int i, j;
|
1174 |
|
|
|
1175 |
|
|
if (!sb)
|
1176 |
|
|
return 1;
|
1177 |
|
|
|
1178 |
|
|
for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
|
1179 |
|
|
{
|
1180 |
|
|
if (UDF_SB_ANCHOR(sb)[i] && (bh = udf_read_tagged(sb,
|
1181 |
|
|
UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident)))
|
1182 |
|
|
{
|
1183 |
|
|
anchor = (struct anchorVolDescPtr *)bh->b_data;
|
1184 |
|
|
|
1185 |
|
|
/* Locate the main sequence */
|
1186 |
|
|
main_s = le32_to_cpu( anchor->mainVolDescSeqExt.extLocation );
|
1187 |
|
|
main_e = le32_to_cpu( anchor->mainVolDescSeqExt.extLength );
|
1188 |
|
|
main_e = main_e >> sb->s_blocksize_bits;
|
1189 |
|
|
main_e += main_s;
|
1190 |
|
|
|
1191 |
|
|
/* Locate the reserve sequence */
|
1192 |
|
|
reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
|
1193 |
|
|
reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
|
1194 |
|
|
reserve_e = reserve_e >> sb->s_blocksize_bits;
|
1195 |
|
|
reserve_e += reserve_s;
|
1196 |
|
|
|
1197 |
|
|
udf_release_data(bh);
|
1198 |
|
|
|
1199 |
|
|
/* Process the main & reserve sequences */
|
1200 |
|
|
/* responsible for finding the PartitionDesc(s) */
|
1201 |
|
|
if (!(udf_process_sequence(sb, main_s, main_e, fileset) &&
|
1202 |
|
|
udf_process_sequence(sb, reserve_s, reserve_e, fileset)))
|
1203 |
|
|
{
|
1204 |
|
|
break;
|
1205 |
|
|
}
|
1206 |
|
|
}
|
1207 |
|
|
}
|
1208 |
|
|
|
1209 |
|
|
if (i == sizeof(UDF_SB_ANCHOR(sb))/sizeof(int))
|
1210 |
|
|
{
|
1211 |
|
|
udf_debug("No Anchor block found\n");
|
1212 |
|
|
return 1;
|
1213 |
|
|
}
|
1214 |
|
|
else
|
1215 |
|
|
udf_debug("Using anchor in block %d\n", UDF_SB_ANCHOR(sb)[i]);
|
1216 |
|
|
|
1217 |
|
|
for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
|
1218 |
|
|
{
|
1219 |
|
|
switch UDF_SB_PARTTYPE(sb, i)
|
1220 |
|
|
{
|
1221 |
|
|
case UDF_VIRTUAL_MAP15:
|
1222 |
|
|
case UDF_VIRTUAL_MAP20:
|
1223 |
|
|
{
|
1224 |
|
|
lb_addr ino;
|
1225 |
|
|
|
1226 |
|
|
if (!UDF_SB_LASTBLOCK(sb))
|
1227 |
|
|
{
|
1228 |
|
|
UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
|
1229 |
|
|
udf_find_anchor(sb);
|
1230 |
|
|
}
|
1231 |
|
|
|
1232 |
|
|
if (!UDF_SB_LASTBLOCK(sb))
|
1233 |
|
|
{
|
1234 |
|
|
udf_debug("Unable to determine Lastblock (For Virtual Partition)\n");
|
1235 |
|
|
return 1;
|
1236 |
|
|
}
|
1237 |
|
|
|
1238 |
|
|
for (j=0; j<UDF_SB_NUMPARTS(sb); j++)
|
1239 |
|
|
{
|
1240 |
|
|
if (j != i &&
|
1241 |
|
|
UDF_SB_PARTVSN(sb,i) == UDF_SB_PARTVSN(sb,j) &&
|
1242 |
|
|
UDF_SB_PARTNUM(sb,i) == UDF_SB_PARTNUM(sb,j))
|
1243 |
|
|
{
|
1244 |
|
|
ino.partitionReferenceNum = j;
|
1245 |
|
|
ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) -
|
1246 |
|
|
UDF_SB_PARTROOT(sb,j);
|
1247 |
|
|
break;
|
1248 |
|
|
}
|
1249 |
|
|
}
|
1250 |
|
|
|
1251 |
|
|
if (j == UDF_SB_NUMPARTS(sb))
|
1252 |
|
|
return 1;
|
1253 |
|
|
|
1254 |
|
|
if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino)))
|
1255 |
|
|
return 1;
|
1256 |
|
|
|
1257 |
|
|
if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP15)
|
1258 |
|
|
{
|
1259 |
|
|
UDF_SB_TYPEVIRT(sb,i).s_start_offset = udf_ext0_offset(UDF_SB_VAT(sb));
|
1260 |
|
|
UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 36) >> 2;
|
1261 |
|
|
}
|
1262 |
|
|
else if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP20)
|
1263 |
|
|
{
|
1264 |
|
|
struct buffer_head *bh = NULL;
|
1265 |
|
|
uint32_t pos;
|
1266 |
|
|
|
1267 |
|
|
pos = udf_block_map(UDF_SB_VAT(sb), 0);
|
1268 |
|
|
bh = sb_bread(sb, pos);
|
1269 |
|
|
UDF_SB_TYPEVIRT(sb,i).s_start_offset =
|
1270 |
|
|
le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) +
|
1271 |
|
|
udf_ext0_offset(UDF_SB_VAT(sb));
|
1272 |
|
|
UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size -
|
1273 |
|
|
UDF_SB_TYPEVIRT(sb,i).s_start_offset) >> 2;
|
1274 |
|
|
udf_release_data(bh);
|
1275 |
|
|
}
|
1276 |
|
|
UDF_SB_PARTROOT(sb,i) = udf_get_pblock(sb, 0, i, 0);
|
1277 |
|
|
UDF_SB_PARTLEN(sb,i) = UDF_SB_PARTLEN(sb,ino.partitionReferenceNum);
|
1278 |
|
|
}
|
1279 |
|
|
}
|
1280 |
|
|
}
|
1281 |
|
|
return 0;
|
1282 |
|
|
}
|
1283 |
|
|
|
1284 |
|
|
static void udf_open_lvid(struct super_block *sb)
|
1285 |
|
|
{
|
1286 |
|
|
if (UDF_SB_LVIDBH(sb))
|
1287 |
|
|
{
|
1288 |
|
|
int i;
|
1289 |
|
|
timestamp cpu_time;
|
1290 |
|
|
|
1291 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
1292 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
1293 |
|
|
if (udf_time_to_stamp(&cpu_time, CURRENT_TIME, CURRENT_UTIME))
|
1294 |
|
|
UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
|
1295 |
|
|
UDF_SB_LVID(sb)->integrityType = LVID_INTEGRITY_TYPE_OPEN;
|
1296 |
|
|
|
1297 |
|
|
UDF_SB_LVID(sb)->descTag.descCRC =
|
1298 |
|
|
cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
|
1299 |
|
|
le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
|
1300 |
|
|
|
1301 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
|
1302 |
|
|
for (i=0; i<16; i++)
|
1303 |
|
|
if (i != 4)
|
1304 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum +=
|
1305 |
|
|
((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i];
|
1306 |
|
|
|
1307 |
|
|
mark_buffer_dirty(UDF_SB_LVIDBH(sb));
|
1308 |
|
|
}
|
1309 |
|
|
}
|
1310 |
|
|
|
1311 |
|
|
static void udf_close_lvid(struct super_block *sb)
|
1312 |
|
|
{
|
1313 |
|
|
if (UDF_SB_LVIDBH(sb) &&
|
1314 |
|
|
UDF_SB_LVID(sb)->integrityType == LVID_INTEGRITY_TYPE_OPEN)
|
1315 |
|
|
{
|
1316 |
|
|
int i;
|
1317 |
|
|
timestamp cpu_time;
|
1318 |
|
|
|
1319 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
1320 |
|
|
UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
1321 |
|
|
if (udf_time_to_stamp(&cpu_time, CURRENT_TIME, CURRENT_UTIME))
|
1322 |
|
|
UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
|
1323 |
|
|
if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev))
|
1324 |
|
|
UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
|
1325 |
|
|
if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev))
|
1326 |
|
|
UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb));
|
1327 |
|
|
if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev))
|
1328 |
|
|
UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb));
|
1329 |
|
|
UDF_SB_LVID(sb)->integrityType = LVID_INTEGRITY_TYPE_CLOSE;
|
1330 |
|
|
|
1331 |
|
|
UDF_SB_LVID(sb)->descTag.descCRC =
|
1332 |
|
|
cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
|
1333 |
|
|
le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
|
1334 |
|
|
|
1335 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
|
1336 |
|
|
for (i=0; i<16; i++)
|
1337 |
|
|
if (i != 4)
|
1338 |
|
|
UDF_SB_LVID(sb)->descTag.tagChecksum +=
|
1339 |
|
|
((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i];
|
1340 |
|
|
|
1341 |
|
|
mark_buffer_dirty(UDF_SB_LVIDBH(sb));
|
1342 |
|
|
}
|
1343 |
|
|
}
|
1344 |
|
|
|
1345 |
|
|
/*
|
1346 |
|
|
* udf_read_super
|
1347 |
|
|
*
|
1348 |
|
|
* PURPOSE
|
1349 |
|
|
* Complete the specified super block.
|
1350 |
|
|
*
|
1351 |
|
|
* PRE-CONDITIONS
|
1352 |
|
|
* sb Pointer to superblock to complete - never NULL.
|
1353 |
|
|
* sb->s_dev Device to read suberblock from.
|
1354 |
|
|
* options Pointer to mount options.
|
1355 |
|
|
* silent Silent flag.
|
1356 |
|
|
*
|
1357 |
|
|
* HISTORY
|
1358 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
1359 |
|
|
* Written, tested, and released.
|
1360 |
|
|
*/
|
1361 |
|
|
static struct super_block *
|
1362 |
|
|
udf_read_super(struct super_block *sb, void *options, int silent)
|
1363 |
|
|
{
|
1364 |
|
|
int i;
|
1365 |
|
|
struct inode *inode=NULL;
|
1366 |
|
|
struct udf_options uopt;
|
1367 |
|
|
lb_addr rootdir, fileset;
|
1368 |
|
|
|
1369 |
|
|
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
|
1370 |
|
|
uopt.uid = -1;
|
1371 |
|
|
uopt.gid = -1;
|
1372 |
|
|
uopt.umask = 0;
|
1373 |
|
|
|
1374 |
|
|
memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info));
|
1375 |
|
|
|
1376 |
|
|
#if UDFFS_RW != 1
|
1377 |
|
|
sb->s_flags |= MS_RDONLY;
|
1378 |
|
|
#endif
|
1379 |
|
|
|
1380 |
|
|
if (!udf_parse_options((char *)options, &uopt))
|
1381 |
|
|
goto error_out;
|
1382 |
|
|
|
1383 |
|
|
if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
|
1384 |
|
|
uopt.flags & (1 << UDF_FLAG_NLS_MAP))
|
1385 |
|
|
{
|
1386 |
|
|
udf_error(sb, "udf_read_super",
|
1387 |
|
|
"utf8 cannot be combined with iocharset\n");
|
1388 |
|
|
goto error_out;
|
1389 |
|
|
}
|
1390 |
|
|
#ifdef CONFIG_NLS
|
1391 |
|
|
if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map)
|
1392 |
|
|
{
|
1393 |
|
|
uopt.nls_map = load_nls_default();
|
1394 |
|
|
if (!uopt.nls_map)
|
1395 |
|
|
uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
|
1396 |
|
|
else
|
1397 |
|
|
udf_debug("Using default NLS map\n");
|
1398 |
|
|
}
|
1399 |
|
|
#endif
|
1400 |
|
|
if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
|
1401 |
|
|
uopt.flags |= (1 << UDF_FLAG_UTF8);
|
1402 |
|
|
|
1403 |
|
|
fileset.logicalBlockNum = 0xFFFFFFFF;
|
1404 |
|
|
fileset.partitionReferenceNum = 0xFFFF;
|
1405 |
|
|
|
1406 |
|
|
UDF_SB(sb)->s_flags = uopt.flags;
|
1407 |
|
|
UDF_SB(sb)->s_uid = uopt.uid;
|
1408 |
|
|
UDF_SB(sb)->s_gid = uopt.gid;
|
1409 |
|
|
UDF_SB(sb)->s_umask = uopt.umask;
|
1410 |
|
|
UDF_SB(sb)->s_nls_map = uopt.nls_map;
|
1411 |
|
|
|
1412 |
|
|
/* Set the block size for all transfers */
|
1413 |
|
|
if (!udf_set_blocksize(sb, uopt.blocksize))
|
1414 |
|
|
goto error_out;
|
1415 |
|
|
|
1416 |
|
|
if ( uopt.session == 0xFFFFFFFF )
|
1417 |
|
|
UDF_SB_SESSION(sb) = udf_get_last_session(sb);
|
1418 |
|
|
else
|
1419 |
|
|
UDF_SB_SESSION(sb) = uopt.session;
|
1420 |
|
|
|
1421 |
|
|
udf_debug("Multi-session=%d\n", UDF_SB_SESSION(sb));
|
1422 |
|
|
|
1423 |
|
|
UDF_SB_LASTBLOCK(sb) = uopt.lastblock;
|
1424 |
|
|
UDF_SB_ANCHOR(sb)[0] = UDF_SB_ANCHOR(sb)[1] = 0;
|
1425 |
|
|
UDF_SB_ANCHOR(sb)[2] = uopt.anchor;
|
1426 |
|
|
UDF_SB_ANCHOR(sb)[3] = UDF_SB_SESSION(sb) + 256;
|
1427 |
|
|
|
1428 |
|
|
if (udf_check_valid(sb, uopt.novrs, silent)) /* read volume recognition sequences */
|
1429 |
|
|
{
|
1430 |
|
|
printk("UDF-fs: No VRS found\n");
|
1431 |
|
|
goto error_out;
|
1432 |
|
|
}
|
1433 |
|
|
|
1434 |
|
|
udf_find_anchor(sb);
|
1435 |
|
|
|
1436 |
|
|
/* Fill in the rest of the superblock */
|
1437 |
|
|
sb->s_op = &udf_sb_ops;
|
1438 |
|
|
sb->dq_op = NULL;
|
1439 |
|
|
sb->s_dirt = 0;
|
1440 |
|
|
sb->s_magic = UDF_SUPER_MAGIC;
|
1441 |
|
|
|
1442 |
|
|
if (udf_load_partition(sb, &fileset))
|
1443 |
|
|
{
|
1444 |
|
|
printk("UDF-fs: No partition found (1)\n");
|
1445 |
|
|
goto error_out;
|
1446 |
|
|
}
|
1447 |
|
|
|
1448 |
|
|
udf_debug("Lastblock=%d\n", UDF_SB_LASTBLOCK(sb));
|
1449 |
|
|
|
1450 |
|
|
if ( UDF_SB_LVIDBH(sb) )
|
1451 |
|
|
{
|
1452 |
|
|
uint16_t minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev);
|
1453 |
|
|
uint16_t minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev);
|
1454 |
|
|
/* uint16_t maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */
|
1455 |
|
|
|
1456 |
|
|
if (minUDFReadRev > UDF_MAX_READ_VERSION)
|
1457 |
|
|
{
|
1458 |
|
|
printk("UDF-fs: minUDFReadRev=%x (max is %x)\n",
|
1459 |
|
|
UDF_SB_LVIDIU(sb)->minUDFReadRev, UDF_MAX_READ_VERSION);
|
1460 |
|
|
goto error_out;
|
1461 |
|
|
}
|
1462 |
|
|
else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
|
1463 |
|
|
{
|
1464 |
|
|
sb->s_flags |= MS_RDONLY;
|
1465 |
|
|
}
|
1466 |
|
|
|
1467 |
|
|
UDF_SB_UDFREV(sb) = minUDFWriteRev;
|
1468 |
|
|
|
1469 |
|
|
if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
|
1470 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
|
1471 |
|
|
if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
|
1472 |
|
|
UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
|
1473 |
|
|
}
|
1474 |
|
|
|
1475 |
|
|
if ( !UDF_SB_NUMPARTS(sb) )
|
1476 |
|
|
{
|
1477 |
|
|
printk("UDF-fs: No partition found (2)\n");
|
1478 |
|
|
goto error_out;
|
1479 |
|
|
}
|
1480 |
|
|
|
1481 |
|
|
if ( udf_find_fileset(sb, &fileset, &rootdir) )
|
1482 |
|
|
{
|
1483 |
|
|
printk("UDF-fs: No fileset found\n");
|
1484 |
|
|
goto error_out;
|
1485 |
|
|
}
|
1486 |
|
|
|
1487 |
|
|
if (!silent)
|
1488 |
|
|
{
|
1489 |
|
|
timestamp ts;
|
1490 |
|
|
udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb), 0);
|
1491 |
|
|
udf_info("UDF %s-%s (%s) Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
|
1492 |
|
|
UDFFS_VERSION, UDFFS_RW ? "rw" : "ro", UDFFS_DATE,
|
1493 |
|
|
UDF_SB_VOLIDENT(sb), ts.year, ts.month, ts.day, ts.hour, ts.minute,
|
1494 |
|
|
ts.typeAndTimezone);
|
1495 |
|
|
}
|
1496 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
1497 |
|
|
udf_open_lvid(sb);
|
1498 |
|
|
|
1499 |
|
|
/* Assign the root inode */
|
1500 |
|
|
/* assign inodes by physical block number */
|
1501 |
|
|
/* perhaps it's not extensible enough, but for now ... */
|
1502 |
|
|
inode = udf_iget(sb, rootdir);
|
1503 |
|
|
if (!inode)
|
1504 |
|
|
{
|
1505 |
|
|
printk("UDF-fs: Error in udf_iget, block=%d, partition=%d\n",
|
1506 |
|
|
rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
|
1507 |
|
|
goto error_out;
|
1508 |
|
|
}
|
1509 |
|
|
|
1510 |
|
|
/* Allocate a dentry for the root inode */
|
1511 |
|
|
sb->s_root = d_alloc_root(inode);
|
1512 |
|
|
if (!sb->s_root)
|
1513 |
|
|
{
|
1514 |
|
|
printk("UDF-fs: Couldn't allocate root dentry\n");
|
1515 |
|
|
iput(inode);
|
1516 |
|
|
goto error_out;
|
1517 |
|
|
}
|
1518 |
|
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
1519 |
|
|
return sb;
|
1520 |
|
|
|
1521 |
|
|
error_out:
|
1522 |
|
|
if (UDF_SB_VAT(sb))
|
1523 |
|
|
iput(UDF_SB_VAT(sb));
|
1524 |
|
|
if (UDF_SB_NUMPARTS(sb))
|
1525 |
|
|
{
|
1526 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
|
1527 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
|
1528 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
|
1529 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
|
1530 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
|
1531 |
|
|
{
|
1532 |
|
|
for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_uspace); i++)
|
1533 |
|
|
{
|
1534 |
|
|
if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i))
|
1535 |
|
|
udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i));
|
1536 |
|
|
}
|
1537 |
|
|
kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
|
1538 |
|
|
}
|
1539 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
|
1540 |
|
|
{
|
1541 |
|
|
for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_fspace); i++)
|
1542 |
|
|
{
|
1543 |
|
|
if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i))
|
1544 |
|
|
udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i));
|
1545 |
|
|
}
|
1546 |
|
|
kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
|
1547 |
|
|
}
|
1548 |
|
|
if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15)
|
1549 |
|
|
{
|
1550 |
|
|
for (i=0; i<4; i++)
|
1551 |
|
|
udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
|
1552 |
|
|
}
|
1553 |
|
|
}
|
1554 |
|
|
#ifdef CONFIG_NLS
|
1555 |
|
|
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
1556 |
|
|
unload_nls(UDF_SB(sb)->s_nls_map);
|
1557 |
|
|
#endif
|
1558 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
1559 |
|
|
udf_close_lvid(sb);
|
1560 |
|
|
udf_release_data(UDF_SB_LVIDBH(sb));
|
1561 |
|
|
UDF_SB_FREE(sb);
|
1562 |
|
|
return NULL;
|
1563 |
|
|
}
|
1564 |
|
|
|
1565 |
|
|
void udf_error(struct super_block *sb, const char *function,
|
1566 |
|
|
const char *fmt, ...)
|
1567 |
|
|
{
|
1568 |
|
|
va_list args;
|
1569 |
|
|
|
1570 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
1571 |
|
|
{
|
1572 |
|
|
/* mark sb error */
|
1573 |
|
|
sb->s_dirt = 1;
|
1574 |
|
|
}
|
1575 |
|
|
va_start(args, fmt);
|
1576 |
|
|
vsprintf(error_buf, fmt, args);
|
1577 |
|
|
va_end(args);
|
1578 |
|
|
printk (KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
|
1579 |
|
|
bdevname(sb->s_dev), function, error_buf);
|
1580 |
|
|
}
|
1581 |
|
|
|
1582 |
|
|
void udf_warning(struct super_block *sb, const char *function,
|
1583 |
|
|
const char *fmt, ...)
|
1584 |
|
|
{
|
1585 |
|
|
va_list args;
|
1586 |
|
|
|
1587 |
|
|
va_start (args, fmt);
|
1588 |
|
|
vsprintf(error_buf, fmt, args);
|
1589 |
|
|
va_end(args);
|
1590 |
|
|
printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
|
1591 |
|
|
bdevname(sb->s_dev), function, error_buf);
|
1592 |
|
|
}
|
1593 |
|
|
|
1594 |
|
|
/*
|
1595 |
|
|
* udf_put_super
|
1596 |
|
|
*
|
1597 |
|
|
* PURPOSE
|
1598 |
|
|
* Prepare for destruction of the superblock.
|
1599 |
|
|
*
|
1600 |
|
|
* DESCRIPTION
|
1601 |
|
|
* Called before the filesystem is unmounted.
|
1602 |
|
|
*
|
1603 |
|
|
* HISTORY
|
1604 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
1605 |
|
|
* Written, tested, and released.
|
1606 |
|
|
*/
|
1607 |
|
|
static void
|
1608 |
|
|
udf_put_super(struct super_block *sb)
|
1609 |
|
|
{
|
1610 |
|
|
int i;
|
1611 |
|
|
|
1612 |
|
|
if (UDF_SB_VAT(sb))
|
1613 |
|
|
iput(UDF_SB_VAT(sb));
|
1614 |
|
|
if (UDF_SB_NUMPARTS(sb))
|
1615 |
|
|
{
|
1616 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
|
1617 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
|
1618 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
|
1619 |
|
|
iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
|
1620 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
|
1621 |
|
|
{
|
1622 |
|
|
for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_uspace); i++)
|
1623 |
|
|
{
|
1624 |
|
|
if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i))
|
1625 |
|
|
udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i));
|
1626 |
|
|
}
|
1627 |
|
|
kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
|
1628 |
|
|
}
|
1629 |
|
|
if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
|
1630 |
|
|
{
|
1631 |
|
|
for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_fspace); i++)
|
1632 |
|
|
{
|
1633 |
|
|
if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i))
|
1634 |
|
|
udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i));
|
1635 |
|
|
}
|
1636 |
|
|
kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
|
1637 |
|
|
}
|
1638 |
|
|
if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15)
|
1639 |
|
|
{
|
1640 |
|
|
for (i=0; i<4; i++)
|
1641 |
|
|
udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
|
1642 |
|
|
}
|
1643 |
|
|
}
|
1644 |
|
|
#ifdef CONFIG_NLS
|
1645 |
|
|
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
1646 |
|
|
unload_nls(UDF_SB(sb)->s_nls_map);
|
1647 |
|
|
#endif
|
1648 |
|
|
if (!(sb->s_flags & MS_RDONLY))
|
1649 |
|
|
udf_close_lvid(sb);
|
1650 |
|
|
udf_release_data(UDF_SB_LVIDBH(sb));
|
1651 |
|
|
UDF_SB_FREE(sb);
|
1652 |
|
|
}
|
1653 |
|
|
|
1654 |
|
|
/*
|
1655 |
|
|
* udf_stat_fs
|
1656 |
|
|
*
|
1657 |
|
|
* PURPOSE
|
1658 |
|
|
* Return info about the filesystem.
|
1659 |
|
|
*
|
1660 |
|
|
* DESCRIPTION
|
1661 |
|
|
* Called by sys_statfs()
|
1662 |
|
|
*
|
1663 |
|
|
* HISTORY
|
1664 |
|
|
* July 1, 1997 - Andrew E. Mileski
|
1665 |
|
|
* Written, tested, and released.
|
1666 |
|
|
*/
|
1667 |
|
|
static int
|
1668 |
|
|
udf_statfs(struct super_block *sb, struct statfs *buf)
|
1669 |
|
|
{
|
1670 |
|
|
buf->f_type = UDF_SUPER_MAGIC;
|
1671 |
|
|
buf->f_bsize = sb->s_blocksize;
|
1672 |
|
|
buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
|
1673 |
|
|
buf->f_bfree = udf_count_free(sb);
|
1674 |
|
|
buf->f_bavail = buf->f_bfree;
|
1675 |
|
|
buf->f_files = (UDF_SB_LVIDBH(sb) ?
|
1676 |
|
|
(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) +
|
1677 |
|
|
le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree;
|
1678 |
|
|
buf->f_ffree = buf->f_bfree;
|
1679 |
|
|
/* __kernel_fsid_t f_fsid */
|
1680 |
|
|
buf->f_namelen = UDF_NAME_LEN;
|
1681 |
|
|
|
1682 |
|
|
return 0;
|
1683 |
|
|
}
|
1684 |
|
|
|
1685 |
|
|
static unsigned char udf_bitmap_lookup[16] = {
|
1686 |
|
|
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
|
1687 |
|
|
};
|
1688 |
|
|
|
1689 |
|
|
static unsigned int
|
1690 |
|
|
udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap)
|
1691 |
|
|
{
|
1692 |
|
|
struct buffer_head *bh = NULL;
|
1693 |
|
|
unsigned int accum = 0;
|
1694 |
|
|
int index;
|
1695 |
|
|
int block = 0, newblock;
|
1696 |
|
|
lb_addr loc;
|
1697 |
|
|
uint32_t bytes;
|
1698 |
|
|
uint8_t value;
|
1699 |
|
|
uint8_t *ptr;
|
1700 |
|
|
uint16_t ident;
|
1701 |
|
|
struct spaceBitmapDesc *bm;
|
1702 |
|
|
|
1703 |
|
|
loc.logicalBlockNum = bitmap->s_extPosition;
|
1704 |
|
|
loc.partitionReferenceNum = UDF_SB_PARTITION(sb);
|
1705 |
|
|
bh = udf_read_ptagged(sb, loc, 0, &ident);
|
1706 |
|
|
|
1707 |
|
|
if (!bh)
|
1708 |
|
|
{
|
1709 |
|
|
printk(KERN_ERR "udf: udf_count_free failed\n");
|
1710 |
|
|
return 0;
|
1711 |
|
|
}
|
1712 |
|
|
else if (ident != TAG_IDENT_SBD)
|
1713 |
|
|
{
|
1714 |
|
|
udf_release_data(bh);
|
1715 |
|
|
printk(KERN_ERR "udf: udf_count_free failed\n");
|
1716 |
|
|
return 0;
|
1717 |
|
|
}
|
1718 |
|
|
|
1719 |
|
|
bm = (struct spaceBitmapDesc *)bh->b_data;
|
1720 |
|
|
bytes = bm->numOfBytes;
|
1721 |
|
|
index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
|
1722 |
|
|
ptr = (uint8_t *)bh->b_data;
|
1723 |
|
|
|
1724 |
|
|
while ( bytes > 0 )
|
1725 |
|
|
{
|
1726 |
|
|
while ((bytes > 0) && (index < sb->s_blocksize))
|
1727 |
|
|
{
|
1728 |
|
|
value = ptr[index];
|
1729 |
|
|
accum += udf_bitmap_lookup[ value & 0x0f ];
|
1730 |
|
|
accum += udf_bitmap_lookup[ value >> 4 ];
|
1731 |
|
|
index++;
|
1732 |
|
|
bytes--;
|
1733 |
|
|
}
|
1734 |
|
|
if ( bytes )
|
1735 |
|
|
{
|
1736 |
|
|
udf_release_data(bh);
|
1737 |
|
|
newblock = udf_get_lb_pblock(sb, loc, ++block);
|
1738 |
|
|
bh = udf_tread(sb, newblock);
|
1739 |
|
|
if (!bh)
|
1740 |
|
|
{
|
1741 |
|
|
udf_debug("read failed\n");
|
1742 |
|
|
return accum;
|
1743 |
|
|
}
|
1744 |
|
|
index = 0;
|
1745 |
|
|
ptr = (uint8_t *)bh->b_data;
|
1746 |
|
|
}
|
1747 |
|
|
}
|
1748 |
|
|
udf_release_data(bh);
|
1749 |
|
|
return accum;
|
1750 |
|
|
}
|
1751 |
|
|
|
1752 |
|
|
static unsigned int
|
1753 |
|
|
udf_count_free_table(struct super_block *sb, struct inode * table)
|
1754 |
|
|
{
|
1755 |
|
|
unsigned int accum = 0;
|
1756 |
|
|
uint32_t extoffset, elen;
|
1757 |
|
|
lb_addr bloc, eloc;
|
1758 |
|
|
int8_t etype;
|
1759 |
|
|
struct buffer_head *bh = NULL;
|
1760 |
|
|
|
1761 |
|
|
bloc = UDF_I_LOCATION(table);
|
1762 |
|
|
extoffset = sizeof(struct unallocSpaceEntry);
|
1763 |
|
|
|
1764 |
|
|
while ((etype = udf_next_aext(table, &bloc, &extoffset, &eloc, &elen, &bh, 1)) != -1)
|
1765 |
|
|
{
|
1766 |
|
|
accum += (elen >> table->i_sb->s_blocksize_bits);
|
1767 |
|
|
}
|
1768 |
|
|
udf_release_data(bh);
|
1769 |
|
|
return accum;
|
1770 |
|
|
}
|
1771 |
|
|
|
1772 |
|
|
static unsigned int
|
1773 |
|
|
udf_count_free(struct super_block *sb)
|
1774 |
|
|
{
|
1775 |
|
|
unsigned int accum = 0;
|
1776 |
|
|
|
1777 |
|
|
if (UDF_SB_LVIDBH(sb))
|
1778 |
|
|
{
|
1779 |
|
|
if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb))
|
1780 |
|
|
{
|
1781 |
|
|
accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]);
|
1782 |
|
|
|
1783 |
|
|
if (accum == 0xFFFFFFFF)
|
1784 |
|
|
accum = 0;
|
1785 |
|
|
}
|
1786 |
|
|
}
|
1787 |
|
|
|
1788 |
|
|
if (accum)
|
1789 |
|
|
return accum;
|
1790 |
|
|
|
1791 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
|
1792 |
|
|
{
|
1793 |
|
|
accum += udf_count_free_bitmap(sb,
|
1794 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
|
1795 |
|
|
}
|
1796 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
|
1797 |
|
|
{
|
1798 |
|
|
accum += udf_count_free_bitmap(sb,
|
1799 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
|
1800 |
|
|
}
|
1801 |
|
|
if (accum)
|
1802 |
|
|
return accum;
|
1803 |
|
|
|
1804 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
|
1805 |
|
|
{
|
1806 |
|
|
accum += udf_count_free_table(sb,
|
1807 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
|
1808 |
|
|
}
|
1809 |
|
|
if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
|
1810 |
|
|
{
|
1811 |
|
|
accum += udf_count_free_table(sb,
|
1812 |
|
|
UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
|
1813 |
|
|
}
|
1814 |
|
|
|
1815 |
|
|
return accum;
|
1816 |
|
|
}
|