![Marcin Slusarz](/assets/img/avatar_default.png)
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Ben Fennema <bfennema@falcon.csc.calpoly.edu> Acked-by: Jan Kara <jack@suse.cz> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012 lines
54 KiB
C
2012 lines
54 KiB
C
/*
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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
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* vol descs. 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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#include <linux/parser.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 <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 <linux/errno.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 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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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 *, kernel_lb_addr *);
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static int udf_load_logicalvol(struct super_block *, struct buffer_head *,
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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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kernel_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 *,
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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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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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struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
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{
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struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
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__u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
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__u32 offset = number_of_partitions * 2 * sizeof(uint32_t)/sizeof(uint8_t);
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return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
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}
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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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{
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return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
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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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static struct kmem_cache *udf_inode_cachep;
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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 = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
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if (!ei)
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return NULL;
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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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return &ei->vfs_inode;
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}
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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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{
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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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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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if (!udf_inode_cachep)
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return -ENOMEM;
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return 0;
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}
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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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/* 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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struct udf_options {
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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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int err;
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err = init_inodecache();
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if (err)
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goto out1;
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err = register_filesystem(&udf_fstype);
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if (err)
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goto out;
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return 0;
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out:
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destroy_inodecache();
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out1:
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return err;
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}
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static void __exit exit_udf_fs(void)
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{
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unregister_filesystem(&udf_fstype);
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destroy_inodecache();
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}
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module_init(init_udf_fs)
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module_exit(exit_udf_fs)
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static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
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{
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struct udf_sb_info *sbi = UDF_SB(sb);
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sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
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GFP_KERNEL);
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if (!sbi->s_partmaps) {
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udf_error(sb, __FUNCTION__,
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"Unable to allocate space for %d partition maps",
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count);
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sbi->s_partitions = 0;
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return -ENOMEM;
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}
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sbi->s_partitions = count;
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return 0;
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}
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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> 1 Mount options parsed okay.
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* <return> 0 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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enum {
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Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
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Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
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Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
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Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
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Opt_rootdir, Opt_utf8, Opt_iocharset,
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Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
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};
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static match_table_t tokens = {
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{Opt_novrs, "novrs"},
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{Opt_nostrict, "nostrict"},
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{Opt_bs, "bs=%u"},
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{Opt_unhide, "unhide"},
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{Opt_undelete, "undelete"},
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{Opt_noadinicb, "noadinicb"},
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{Opt_adinicb, "adinicb"},
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{Opt_shortad, "shortad"},
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{Opt_longad, "longad"},
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{Opt_uforget, "uid=forget"},
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{Opt_uignore, "uid=ignore"},
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{Opt_gforget, "gid=forget"},
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{Opt_gignore, "gid=ignore"},
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{Opt_gid, "gid=%u"},
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{Opt_uid, "uid=%u"},
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{Opt_umask, "umask=%o"},
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{Opt_session, "session=%u"},
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{Opt_lastblock, "lastblock=%u"},
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{Opt_anchor, "anchor=%u"},
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{Opt_volume, "volume=%u"},
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{Opt_partition, "partition=%u"},
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{Opt_fileset, "fileset=%u"},
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{Opt_rootdir, "rootdir=%u"},
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{Opt_utf8, "utf8"},
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{Opt_iocharset, "iocharset=%s"},
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{Opt_err, NULL}
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};
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static int udf_parse_options(char *options, struct udf_options *uopt)
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{
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char *p;
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int option;
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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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while ((p = strsep(&options, ",")) != NULL) {
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substring_t args[MAX_OPT_ARGS];
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int token;
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if (!*p)
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continue;
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token = match_token(p, tokens, args);
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switch (token) {
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case Opt_novrs:
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uopt->novrs = 1;
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case Opt_bs:
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if (match_int(&args[0], &option))
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return 0;
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uopt->blocksize = option;
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break;
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case Opt_unhide:
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uopt->flags |= (1 << UDF_FLAG_UNHIDE);
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break;
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case Opt_undelete:
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uopt->flags |= (1 << UDF_FLAG_UNDELETE);
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break;
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case Opt_noadinicb:
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uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
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break;
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case Opt_adinicb:
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uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
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break;
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case Opt_shortad:
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uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
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break;
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case Opt_longad:
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uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
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break;
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case Opt_gid:
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if (match_int(args, &option))
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return 0;
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uopt->gid = option;
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uopt->flags |= (1 << UDF_FLAG_GID_SET);
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break;
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case Opt_uid:
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if (match_int(args, &option))
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return 0;
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uopt->uid = option;
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uopt->flags |= (1 << UDF_FLAG_UID_SET);
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break;
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case Opt_umask:
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if (match_octal(args, &option))
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return 0;
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uopt->umask = option;
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break;
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case Opt_nostrict:
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uopt->flags &= ~(1 << UDF_FLAG_STRICT);
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break;
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case Opt_session:
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if (match_int(args, &option))
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return 0;
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uopt->session = option;
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break;
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case Opt_lastblock:
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if (match_int(args, &option))
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return 0;
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uopt->lastblock = option;
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break;
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case Opt_anchor:
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if (match_int(args, &option))
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return 0;
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uopt->anchor = option;
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break;
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case Opt_volume:
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if (match_int(args, &option))
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return 0;
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uopt->volume = option;
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break;
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case Opt_partition:
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if (match_int(args, &option))
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return 0;
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uopt->partition = option;
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break;
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case Opt_fileset:
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if (match_int(args, &option))
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return 0;
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uopt->fileset = option;
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break;
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case Opt_rootdir:
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if (match_int(args, &option))
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return 0;
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uopt->rootdir = option;
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break;
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case Opt_utf8:
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uopt->flags |= (1 << UDF_FLAG_UTF8);
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break;
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#ifdef CONFIG_UDF_NLS
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case Opt_iocharset:
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uopt->nls_map = load_nls(args[0].from);
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uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
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break;
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#endif
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case Opt_uignore:
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uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
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break;
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case Opt_uforget:
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uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
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break;
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case Opt_gignore:
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uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
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break;
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case Opt_gforget:
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uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
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break;
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default:
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printk(KERN_ERR "udf: bad mount option \"%s\" "
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"or missing value\n", p);
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return 0;
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}
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}
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return 1;
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}
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void udf_write_super(struct super_block *sb)
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{
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lock_kernel();
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if (!(sb->s_flags & MS_RDONLY))
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udf_open_lvid(sb);
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sb->s_dirt = 0;
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unlock_kernel();
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}
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static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
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{
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struct udf_options uopt;
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struct udf_sb_info *sbi = UDF_SB(sb);
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uopt.flags = sbi->s_flags;
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uopt.uid = sbi->s_uid;
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uopt.gid = sbi->s_gid;
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uopt.umask = sbi->s_umask;
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if (!udf_parse_options(options, &uopt))
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return -EINVAL;
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sbi->s_flags = uopt.flags;
|
|
sbi->s_uid = uopt.uid;
|
|
sbi->s_gid = uopt.gid;
|
|
sbi->s_umask = uopt.umask;
|
|
|
|
if (sbi->s_lvid_bh) {
|
|
int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
|
|
if (write_rev > UDF_MAX_WRITE_VERSION)
|
|
*flags |= MS_RDONLY;
|
|
}
|
|
|
|
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
|
|
return 0;
|
|
if (*flags & MS_RDONLY)
|
|
udf_close_lvid(sb);
|
|
else
|
|
udf_open_lvid(sb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* udf_set_blocksize
|
|
*
|
|
* PURPOSE
|
|
* Set the block size to be used in all transfers.
|
|
*
|
|
* DESCRIPTION
|
|
* To allow room for a DMA transfer, it is best to guess big when unsure.
|
|
* This routine picks 2048 bytes as the blocksize when guessing. This
|
|
* should be adequate until devices with larger block sizes become common.
|
|
*
|
|
* Note that the Linux kernel can currently only deal with blocksizes of
|
|
* 512, 1024, 2048, 4096, and 8192 bytes.
|
|
*
|
|
* PRE-CONDITIONS
|
|
* sb Pointer to _locked_ superblock.
|
|
*
|
|
* POST-CONDITIONS
|
|
* sb->s_blocksize Blocksize.
|
|
* sb->s_blocksize_bits log2 of blocksize.
|
|
* <return> 0 Blocksize is valid.
|
|
* <return> 1 Blocksize is invalid.
|
|
*
|
|
* HISTORY
|
|
* July 1, 1997 - Andrew E. Mileski
|
|
* Written, tested, and released.
|
|
*/
|
|
static int udf_set_blocksize(struct super_block *sb, int bsize)
|
|
{
|
|
if (!sb_min_blocksize(sb, bsize)) {
|
|
udf_debug("Bad block size (%d)\n", bsize);
|
|
printk(KERN_ERR "udf: bad block size (%d)\n", bsize);
|
|
return 0;
|
|
}
|
|
|
|
return sb->s_blocksize;
|
|
}
|
|
|
|
static int udf_vrs(struct super_block *sb, int silent)
|
|
{
|
|
struct volStructDesc *vsd = NULL;
|
|
int sector = 32768;
|
|
int sectorsize;
|
|
struct buffer_head *bh = NULL;
|
|
int iso9660 = 0;
|
|
int nsr02 = 0;
|
|
int nsr03 = 0;
|
|
struct udf_sb_info *sbi;
|
|
|
|
/* Block size must be a multiple of 512 */
|
|
if (sb->s_blocksize & 511)
|
|
return 0;
|
|
sbi = UDF_SB(sb);
|
|
|
|
if (sb->s_blocksize < sizeof(struct volStructDesc))
|
|
sectorsize = sizeof(struct volStructDesc);
|
|
else
|
|
sectorsize = sb->s_blocksize;
|
|
|
|
sector += (sbi->s_session << sb->s_blocksize_bits);
|
|
|
|
udf_debug("Starting at sector %u (%ld byte sectors)\n",
|
|
(sector >> sb->s_blocksize_bits), sb->s_blocksize);
|
|
/* Process the sequence (if applicable) */
|
|
for (; !nsr02 && !nsr03; sector += sectorsize) {
|
|
/* Read a block */
|
|
bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
|
|
if (!bh)
|
|
break;
|
|
|
|
/* Look for ISO descriptors */
|
|
vsd = (struct volStructDesc *)(bh->b_data +
|
|
(sector & (sb->s_blocksize - 1)));
|
|
|
|
if (vsd->stdIdent[0] == 0) {
|
|
brelse(bh);
|
|
break;
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
|
|
VSD_STD_ID_LEN)) {
|
|
iso9660 = sector;
|
|
switch (vsd->structType) {
|
|
case 0:
|
|
udf_debug("ISO9660 Boot Record found\n");
|
|
break;
|
|
case 1:
|
|
udf_debug("ISO9660 Primary Volume Descriptor "
|
|
"found\n");
|
|
break;
|
|
case 2:
|
|
udf_debug("ISO9660 Supplementary Volume "
|
|
"Descriptor found\n");
|
|
break;
|
|
case 3:
|
|
udf_debug("ISO9660 Volume Partition Descriptor "
|
|
"found\n");
|
|
break;
|
|
case 255:
|
|
udf_debug("ISO9660 Volume Descriptor Set "
|
|
"Terminator found\n");
|
|
break;
|
|
default:
|
|
udf_debug("ISO9660 VRS (%u) found\n",
|
|
vsd->structType);
|
|
break;
|
|
}
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
|
|
VSD_STD_ID_LEN))
|
|
; /* nothing */
|
|
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
|
|
VSD_STD_ID_LEN)) {
|
|
brelse(bh);
|
|
break;
|
|
} else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
|
|
VSD_STD_ID_LEN))
|
|
nsr02 = sector;
|
|
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
|
|
VSD_STD_ID_LEN))
|
|
nsr03 = sector;
|
|
brelse(bh);
|
|
}
|
|
|
|
if (nsr03)
|
|
return nsr03;
|
|
else if (nsr02)
|
|
return nsr02;
|
|
else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
|
|
return -1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* udf_find_anchor
|
|
*
|
|
* PURPOSE
|
|
* Find an anchor volume descriptor.
|
|
*
|
|
* PRE-CONDITIONS
|
|
* sb Pointer to _locked_ superblock.
|
|
* lastblock Last block on media.
|
|
*
|
|
* POST-CONDITIONS
|
|
* <return> 1 if not found, 0 if ok
|
|
*
|
|
* HISTORY
|
|
* July 1, 1997 - Andrew E. Mileski
|
|
* Written, tested, and released.
|
|
*/
|
|
static void udf_find_anchor(struct super_block *sb)
|
|
{
|
|
int lastblock;
|
|
struct buffer_head *bh = NULL;
|
|
uint16_t ident;
|
|
uint32_t location;
|
|
int i;
|
|
struct udf_sb_info *sbi;
|
|
|
|
sbi = UDF_SB(sb);
|
|
lastblock = sbi->s_last_block;
|
|
|
|
if (lastblock) {
|
|
int varlastblock = udf_variable_to_fixed(lastblock);
|
|
int last[] = { lastblock, lastblock - 2,
|
|
lastblock - 150, lastblock - 152,
|
|
varlastblock, varlastblock - 2,
|
|
varlastblock - 150, varlastblock - 152 };
|
|
|
|
lastblock = 0;
|
|
|
|
/* Search for an anchor volume descriptor pointer */
|
|
|
|
/* according to spec, anchor is in either:
|
|
* block 256
|
|
* lastblock-256
|
|
* lastblock
|
|
* however, if the disc isn't closed, it could be 512 */
|
|
|
|
for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) {
|
|
ident = location = 0;
|
|
if (last[i] >= 0) {
|
|
bh = sb_bread(sb, last[i]);
|
|
if (bh) {
|
|
tag *t = (tag *)bh->b_data;
|
|
ident = le16_to_cpu(t->tagIdent);
|
|
location = le32_to_cpu(t->tagLocation);
|
|
brelse(bh);
|
|
}
|
|
}
|
|
|
|
if (ident == TAG_IDENT_AVDP) {
|
|
if (location == last[i] - sbi->s_session) {
|
|
lastblock = last[i] - sbi->s_session;
|
|
sbi->s_anchor[0] = lastblock;
|
|
sbi->s_anchor[1] = lastblock - 256;
|
|
} else if (location == udf_variable_to_fixed(last[i]) - sbi->s_session) {
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
|
lastblock = udf_variable_to_fixed(last[i]) - sbi->s_session;
|
|
sbi->s_anchor[0] = lastblock;
|
|
sbi->s_anchor[1] = lastblock - 256 - sbi->s_session;
|
|
} else {
|
|
udf_debug("Anchor found at block %d, location mismatch %d.\n",
|
|
last[i], location);
|
|
}
|
|
} else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE) {
|
|
lastblock = last[i];
|
|
sbi->s_anchor[3] = 512;
|
|
} else {
|
|
ident = location = 0;
|
|
if (last[i] >= 256) {
|
|
bh = sb_bread(sb, last[i] - 256);
|
|
if (bh) {
|
|
tag *t = (tag *)bh->b_data;
|
|
ident = le16_to_cpu(t->tagIdent);
|
|
location = le32_to_cpu(t->tagLocation);
|
|
brelse(bh);
|
|
}
|
|
}
|
|
|
|
if (ident == TAG_IDENT_AVDP &&
|
|
location == last[i] - 256 - sbi->s_session) {
|
|
lastblock = last[i];
|
|
sbi->s_anchor[1] = last[i] - 256;
|
|
} else {
|
|
ident = location = 0;
|
|
if (last[i] >= 312 + sbi->s_session) {
|
|
bh = sb_bread(sb, last[i] - 312 - sbi->s_session);
|
|
if (bh) {
|
|
tag *t = (tag *)bh->b_data;
|
|
ident = le16_to_cpu(t->tagIdent);
|
|
location = le32_to_cpu(t->tagLocation);
|
|
brelse(bh);
|
|
}
|
|
}
|
|
|
|
if (ident == TAG_IDENT_AVDP &&
|
|
location == udf_variable_to_fixed(last[i]) - 256) {
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
|
lastblock = udf_variable_to_fixed(last[i]);
|
|
sbi->s_anchor[1] = lastblock - 256;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!lastblock) {
|
|
/* We haven't found the lastblock. check 312 */
|
|
bh = sb_bread(sb, 312 + sbi->s_session);
|
|
if (bh) {
|
|
tag *t = (tag *)bh->b_data;
|
|
ident = le16_to_cpu(t->tagIdent);
|
|
location = le32_to_cpu(t->tagLocation);
|
|
brelse(bh);
|
|
|
|
if (ident == TAG_IDENT_AVDP && location == 256)
|
|
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
|
|
if (sbi->s_anchor[i]) {
|
|
bh = udf_read_tagged(sb, sbi->s_anchor[i],
|
|
sbi->s_anchor[i], &ident);
|
|
if (!bh)
|
|
sbi->s_anchor[i] = 0;
|
|
else {
|
|
brelse(bh);
|
|
if ((ident != TAG_IDENT_AVDP) &&
|
|
(i || (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE)))
|
|
sbi->s_anchor[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
sbi->s_last_block = lastblock;
|
|
}
|
|
|
|
static int udf_find_fileset(struct super_block *sb,
|
|
kernel_lb_addr *fileset,
|
|
kernel_lb_addr *root)
|
|
{
|
|
struct buffer_head *bh = NULL;
|
|
long lastblock;
|
|
uint16_t ident;
|
|
struct udf_sb_info *sbi;
|
|
|
|
if (fileset->logicalBlockNum != 0xFFFFFFFF ||
|
|
fileset->partitionReferenceNum != 0xFFFF) {
|
|
bh = udf_read_ptagged(sb, *fileset, 0, &ident);
|
|
|
|
if (!bh) {
|
|
return 1;
|
|
} else if (ident != TAG_IDENT_FSD) {
|
|
brelse(bh);
|
|
return 1;
|
|
}
|
|
|
|
}
|
|
|
|
sbi = UDF_SB(sb);
|
|
if (!bh) {
|
|
/* Search backwards through the partitions */
|
|
kernel_lb_addr newfileset;
|
|
|
|
/* --> cvg: FIXME - is it reasonable? */
|
|
return 1;
|
|
|
|
for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
|
|
(newfileset.partitionReferenceNum != 0xFFFF &&
|
|
fileset->logicalBlockNum == 0xFFFFFFFF &&
|
|
fileset->partitionReferenceNum == 0xFFFF);
|
|
newfileset.partitionReferenceNum--) {
|
|
lastblock = sbi->s_partmaps
|
|
[newfileset.partitionReferenceNum]
|
|
.s_partition_len;
|
|
newfileset.logicalBlockNum = 0;
|
|
|
|
do {
|
|
bh = udf_read_ptagged(sb, newfileset, 0,
|
|
&ident);
|
|
if (!bh) {
|
|
newfileset.logicalBlockNum++;
|
|
continue;
|
|
}
|
|
|
|
switch (ident) {
|
|
case TAG_IDENT_SBD:
|
|
{
|
|
struct spaceBitmapDesc *sp;
|
|
sp = (struct spaceBitmapDesc *)bh->b_data;
|
|
newfileset.logicalBlockNum += 1 +
|
|
((le32_to_cpu(sp->numOfBytes) +
|
|
sizeof(struct spaceBitmapDesc) - 1)
|
|
>> sb->s_blocksize_bits);
|
|
brelse(bh);
|
|
break;
|
|
}
|
|
case TAG_IDENT_FSD:
|
|
*fileset = newfileset;
|
|
break;
|
|
default:
|
|
newfileset.logicalBlockNum++;
|
|
brelse(bh);
|
|
bh = NULL;
|
|
break;
|
|
}
|
|
} while (newfileset.logicalBlockNum < lastblock &&
|
|
fileset->logicalBlockNum == 0xFFFFFFFF &&
|
|
fileset->partitionReferenceNum == 0xFFFF);
|
|
}
|
|
}
|
|
|
|
if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
|
|
fileset->partitionReferenceNum != 0xFFFF) && bh) {
|
|
udf_debug("Fileset at block=%d, partition=%d\n",
|
|
fileset->logicalBlockNum,
|
|
fileset->partitionReferenceNum);
|
|
|
|
sbi->s_partition = fileset->partitionReferenceNum;
|
|
udf_load_fileset(sb, bh, root);
|
|
brelse(bh);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
|
|
{
|
|
struct primaryVolDesc *pvoldesc;
|
|
time_t recording;
|
|
long recording_usec;
|
|
struct ustr instr;
|
|
struct ustr outstr;
|
|
|
|
pvoldesc = (struct primaryVolDesc *)bh->b_data;
|
|
|
|
if (udf_stamp_to_time(&recording, &recording_usec,
|
|
lets_to_cpu(pvoldesc->recordingDateAndTime))) {
|
|
kernel_timestamp ts;
|
|
ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
|
|
udf_debug("recording time %ld/%ld, %04u/%02u/%02u"
|
|
" %02u:%02u (%x)\n",
|
|
recording, recording_usec,
|
|
ts.year, ts.month, ts.day, ts.hour,
|
|
ts.minute, ts.typeAndTimezone);
|
|
UDF_SB(sb)->s_record_time.tv_sec = recording;
|
|
UDF_SB(sb)->s_record_time.tv_nsec = recording_usec * 1000;
|
|
}
|
|
|
|
if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) {
|
|
if (udf_CS0toUTF8(&outstr, &instr)) {
|
|
strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name,
|
|
outstr.u_len > 31 ? 31 : outstr.u_len);
|
|
udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
|
|
}
|
|
}
|
|
|
|
if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) {
|
|
if (udf_CS0toUTF8(&outstr, &instr))
|
|
udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
|
|
}
|
|
}
|
|
|
|
static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
|
|
kernel_lb_addr *root)
|
|
{
|
|
struct fileSetDesc *fset;
|
|
|
|
fset = (struct fileSetDesc *)bh->b_data;
|
|
|
|
*root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
|
|
|
|
UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
|
|
|
|
udf_debug("Rootdir at block=%d, partition=%d\n",
|
|
root->logicalBlockNum, root->partitionReferenceNum);
|
|
}
|
|
|
|
int udf_compute_nr_groups(struct super_block *sb, u32 partition)
|
|
{
|
|
struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
|
|
return (map->s_partition_len +
|
|
(sizeof(struct spaceBitmapDesc) << 3) +
|
|
(sb->s_blocksize * 8) - 1) /
|
|
(sb->s_blocksize * 8);
|
|
}
|
|
|
|
static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
|
|
{
|
|
struct udf_bitmap *bitmap;
|
|
int nr_groups;
|
|
int size;
|
|
|
|
nr_groups = udf_compute_nr_groups(sb, index);
|
|
size = sizeof(struct udf_bitmap) +
|
|
(sizeof(struct buffer_head *) * nr_groups);
|
|
|
|
if (size <= PAGE_SIZE)
|
|
bitmap = kmalloc(size, GFP_KERNEL);
|
|
else
|
|
bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
|
|
|
|
if (bitmap == NULL) {
|
|
udf_error(sb, __FUNCTION__,
|
|
"Unable to allocate space for bitmap "
|
|
"and %d buffer_head pointers", nr_groups);
|
|
return NULL;
|
|
}
|
|
|
|
memset(bitmap, 0x00, size);
|
|
bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
|
|
bitmap->s_nr_groups = nr_groups;
|
|
return bitmap;
|
|
}
|
|
|
|
static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
|
|
{
|
|
struct partitionDesc *p;
|
|
int i;
|
|
struct udf_part_map *map;
|
|
struct udf_sb_info *sbi;
|
|
|
|
p = (struct partitionDesc *)bh->b_data;
|
|
sbi = UDF_SB(sb);
|
|
|
|
for (i = 0; i < sbi->s_partitions; i++) {
|
|
map = &sbi->s_partmaps[i];
|
|
udf_debug("Searching map: (%d == %d)\n",
|
|
map->s_partition_num, le16_to_cpu(p->partitionNumber));
|
|
if (map->s_partition_num == le16_to_cpu(p->partitionNumber)) {
|
|
map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
|
|
map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY)
|
|
map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE)
|
|
map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE)
|
|
map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
|
|
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE)
|
|
map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
|
|
|
|
if (!strcmp(p->partitionContents.ident,
|
|
PD_PARTITION_CONTENTS_NSR02) ||
|
|
!strcmp(p->partitionContents.ident,
|
|
PD_PARTITION_CONTENTS_NSR03)) {
|
|
struct partitionHeaderDesc *phd;
|
|
|
|
phd = (struct partitionHeaderDesc *)(p->partitionContentsUse);
|
|
if (phd->unallocSpaceTable.extLength) {
|
|
kernel_lb_addr loc = {
|
|
.logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition),
|
|
.partitionReferenceNum = i,
|
|
};
|
|
|
|
map->s_uspace.s_table =
|
|
udf_iget(sb, loc);
|
|
if (!map->s_uspace.s_table) {
|
|
udf_debug("cannot load unallocSpaceTable (part %d)\n", i);
|
|
return 1;
|
|
}
|
|
map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
|
|
udf_debug("unallocSpaceTable (part %d) @ %ld\n",
|
|
i, map->s_uspace.s_table->i_ino);
|
|
}
|
|
if (phd->unallocSpaceBitmap.extLength) {
|
|
map->s_uspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
|
|
if (map->s_uspace.s_bitmap != NULL) {
|
|
map->s_uspace.s_bitmap->s_extLength =
|
|
le32_to_cpu(phd->unallocSpaceBitmap.extLength);
|
|
map->s_uspace.s_bitmap->s_extPosition =
|
|
le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
|
|
map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
|
|
udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
|
|
i, map->s_uspace.s_bitmap->s_extPosition);
|
|
}
|
|
}
|
|
if (phd->partitionIntegrityTable.extLength)
|
|
udf_debug("partitionIntegrityTable (part %d)\n", i);
|
|
if (phd->freedSpaceTable.extLength) {
|
|
kernel_lb_addr loc = {
|
|
.logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition),
|
|
.partitionReferenceNum = i,
|
|
};
|
|
|
|
map->s_fspace.s_table =
|
|
udf_iget(sb, loc);
|
|
if (!map->s_fspace.s_table) {
|
|
udf_debug("cannot load freedSpaceTable (part %d)\n", i);
|
|
return 1;
|
|
}
|
|
map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
|
|
udf_debug("freedSpaceTable (part %d) @ %ld\n",
|
|
i, map->s_fspace.s_table->i_ino);
|
|
}
|
|
if (phd->freedSpaceBitmap.extLength) {
|
|
map->s_fspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
|
|
if (map->s_fspace.s_bitmap != NULL) {
|
|
map->s_fspace.s_bitmap->s_extLength =
|
|
le32_to_cpu(phd->freedSpaceBitmap.extLength);
|
|
map->s_fspace.s_bitmap->s_extPosition =
|
|
le32_to_cpu(phd->freedSpaceBitmap.extPosition);
|
|
map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
|
|
udf_debug("freedSpaceBitmap (part %d) @ %d\n",
|
|
i, map->s_fspace.s_bitmap->s_extPosition);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (i == sbi->s_partitions) {
|
|
udf_debug("Partition (%d) not found in partition map\n",
|
|
le16_to_cpu(p->partitionNumber));
|
|
} else {
|
|
udf_debug("Partition (%d:%d type %x) starts at physical %d, "
|
|
"block length %d\n",
|
|
le16_to_cpu(p->partitionNumber), i,
|
|
map->s_partition_type,
|
|
map->s_partition_root,
|
|
map->s_partition_len);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int udf_load_logicalvol(struct super_block *sb, struct buffer_head *bh,
|
|
kernel_lb_addr *fileset)
|
|
{
|
|
struct logicalVolDesc *lvd;
|
|
int i, j, offset;
|
|
uint8_t type;
|
|
struct udf_sb_info *sbi = UDF_SB(sb);
|
|
|
|
lvd = (struct logicalVolDesc *)bh->b_data;
|
|
|
|
i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
|
|
if (i != 0)
|
|
return i;
|
|
|
|
for (i = 0, offset = 0;
|
|
i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
|
|
i++, offset += ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength) {
|
|
struct udf_part_map *map = &sbi->s_partmaps[i];
|
|
type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType;
|
|
if (type == 1) {
|
|
struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]);
|
|
map->s_partition_type = UDF_TYPE1_MAP15;
|
|
map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
|
|
map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
|
|
map->s_partition_func = NULL;
|
|
} else if (type == 2) {
|
|
struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]);
|
|
if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL))) {
|
|
if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0150) {
|
|
map->s_partition_type = UDF_VIRTUAL_MAP15;
|
|
map->s_partition_func = udf_get_pblock_virt15;
|
|
} else if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0200) {
|
|
map->s_partition_type = UDF_VIRTUAL_MAP20;
|
|
map->s_partition_func = udf_get_pblock_virt20;
|
|
}
|
|
} else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE))) {
|
|
uint32_t loc;
|
|
uint16_t ident;
|
|
struct sparingTable *st;
|
|
struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]);
|
|
|
|
map->s_partition_type = UDF_SPARABLE_MAP15;
|
|
map->s_type_specific.s_sparing.s_packet_len = le16_to_cpu(spm->packetLength);
|
|
for (j = 0; j < spm->numSparingTables; j++) {
|
|
loc = le32_to_cpu(spm->locSparingTable[j]);
|
|
map->s_type_specific.s_sparing.s_spar_map[j] =
|
|
udf_read_tagged(sb, loc, loc, &ident);
|
|
if (map->s_type_specific.s_sparing.s_spar_map[j] != NULL) {
|
|
st = (struct sparingTable *)map->s_type_specific.s_sparing.s_spar_map[j]->b_data;
|
|
if (ident != 0 ||
|
|
strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING))) {
|
|
brelse(map->s_type_specific.s_sparing.s_spar_map[j]);
|
|
map->s_type_specific.s_sparing.s_spar_map[j] = NULL;
|
|
}
|
|
}
|
|
}
|
|
map->s_partition_func = udf_get_pblock_spar15;
|
|
} else {
|
|
udf_debug("Unknown ident: %s\n",
|
|
upm2->partIdent.ident);
|
|
continue;
|
|
}
|
|
map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
|
|
map->s_partition_num = le16_to_cpu(upm2->partitionNum);
|
|
}
|
|
udf_debug("Partition (%d:%d) type %d on volume %d\n",
|
|
i, map->s_partition_num, type,
|
|
map->s_volumeseqnum);
|
|
}
|
|
|
|
if (fileset) {
|
|
long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
|
|
|
|
*fileset = lelb_to_cpu(la->extLocation);
|
|
udf_debug("FileSet found in LogicalVolDesc at block=%d, "
|
|
"partition=%d\n", fileset->logicalBlockNum,
|
|
fileset->partitionReferenceNum);
|
|
}
|
|
if (lvd->integritySeqExt.extLength)
|
|
udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* udf_load_logicalvolint
|
|
*
|
|
*/
|
|
static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
|
|
{
|
|
struct buffer_head *bh = NULL;
|
|
uint16_t ident;
|
|
struct udf_sb_info *sbi = UDF_SB(sb);
|
|
struct logicalVolIntegrityDesc *lvid;
|
|
|
|
while (loc.extLength > 0 &&
|
|
(bh = udf_read_tagged(sb, loc.extLocation,
|
|
loc.extLocation, &ident)) &&
|
|
ident == TAG_IDENT_LVID) {
|
|
sbi->s_lvid_bh = bh;
|
|
lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
|
|
|
|
if (lvid->nextIntegrityExt.extLength)
|
|
udf_load_logicalvolint(sb,
|
|
leea_to_cpu(lvid->nextIntegrityExt));
|
|
|
|
if (sbi->s_lvid_bh != bh)
|
|
brelse(bh);
|
|
loc.extLength -= sb->s_blocksize;
|
|
loc.extLocation++;
|
|
}
|
|
if (sbi->s_lvid_bh != bh)
|
|
brelse(bh);
|
|
}
|
|
|
|
/*
|
|
* udf_process_sequence
|
|
*
|
|
* PURPOSE
|
|
* Process a main/reserve volume descriptor sequence.
|
|
*
|
|
* PRE-CONDITIONS
|
|
* sb Pointer to _locked_ superblock.
|
|
* block First block of first extent of the sequence.
|
|
* lastblock Lastblock of first extent of the sequence.
|
|
*
|
|
* HISTORY
|
|
* July 1, 1997 - Andrew E. Mileski
|
|
* Written, tested, and released.
|
|
*/
|
|
static int udf_process_sequence(struct super_block *sb, long block,
|
|
long lastblock, kernel_lb_addr *fileset)
|
|
{
|
|
struct buffer_head *bh = NULL;
|
|
struct udf_vds_record vds[VDS_POS_LENGTH];
|
|
struct generic_desc *gd;
|
|
struct volDescPtr *vdp;
|
|
int done = 0;
|
|
int i, j;
|
|
uint32_t vdsn;
|
|
uint16_t ident;
|
|
long next_s = 0, next_e = 0;
|
|
|
|
memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
|
|
|
|
/* Read the main descriptor sequence */
|
|
for (; (!done && block <= lastblock); block++) {
|
|
|
|
bh = udf_read_tagged(sb, block, block, &ident);
|
|
if (!bh)
|
|
break;
|
|
|
|
/* Process each descriptor (ISO 13346 3/8.3-8.4) */
|
|
gd = (struct generic_desc *)bh->b_data;
|
|
vdsn = le32_to_cpu(gd->volDescSeqNum);
|
|
switch (ident) {
|
|
case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
|
|
if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum) {
|
|
vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn;
|
|
vds[VDS_POS_PRIMARY_VOL_DESC].block = block;
|
|
}
|
|
break;
|
|
case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
|
|
if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum) {
|
|
vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn;
|
|
vds[VDS_POS_VOL_DESC_PTR].block = block;
|
|
|
|
vdp = (struct volDescPtr *)bh->b_data;
|
|
next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
|
|
next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength);
|
|
next_e = next_e >> sb->s_blocksize_bits;
|
|
next_e += next_s;
|
|
}
|
|
break;
|
|
case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
|
|
if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum) {
|
|
vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn;
|
|
vds[VDS_POS_IMP_USE_VOL_DESC].block = block;
|
|
}
|
|
break;
|
|
case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
|
|
if (!vds[VDS_POS_PARTITION_DESC].block)
|
|
vds[VDS_POS_PARTITION_DESC].block = block;
|
|
break;
|
|
case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
|
|
if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum) {
|
|
vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn;
|
|
vds[VDS_POS_LOGICAL_VOL_DESC].block = block;
|
|
}
|
|
break;
|
|
case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
|
|
if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum) {
|
|
vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn;
|
|
vds[VDS_POS_UNALLOC_SPACE_DESC].block = block;
|
|
}
|
|
break;
|
|
case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
|
|
vds[VDS_POS_TERMINATING_DESC].block = block;
|
|
if (next_e) {
|
|
block = next_s;
|
|
lastblock = next_e;
|
|
next_s = next_e = 0;
|
|
} else {
|
|
done = 1;
|
|
}
|
|
break;
|
|
}
|
|
brelse(bh);
|
|
}
|
|
for (i = 0; i < VDS_POS_LENGTH; i++) {
|
|
if (vds[i].block) {
|
|
bh = udf_read_tagged(sb, vds[i].block, vds[i].block,
|
|
&ident);
|
|
|
|
if (i == VDS_POS_PRIMARY_VOL_DESC) {
|
|
udf_load_pvoldesc(sb, bh);
|
|
} else if (i == VDS_POS_LOGICAL_VOL_DESC) {
|
|
if (udf_load_logicalvol(sb, bh, fileset)) {
|
|
brelse(bh);
|
|
return 1;
|
|
}
|
|
} else if (i == VDS_POS_PARTITION_DESC) {
|
|
struct buffer_head *bh2 = NULL;
|
|
if (udf_load_partdesc(sb, bh)) {
|
|
brelse(bh);
|
|
return 1;
|
|
}
|
|
for (j = vds[i].block + 1;
|
|
j < vds[VDS_POS_TERMINATING_DESC].block;
|
|
j++) {
|
|
bh2 = udf_read_tagged(sb, j, j, &ident);
|
|
gd = (struct generic_desc *)bh2->b_data;
|
|
if (ident == TAG_IDENT_PD)
|
|
if (udf_load_partdesc(sb,
|
|
bh2)) {
|
|
brelse(bh);
|
|
brelse(bh2);
|
|
return 1;
|
|
}
|
|
brelse(bh2);
|
|
}
|
|
}
|
|
brelse(bh);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* udf_check_valid()
|
|
*/
|
|
static int udf_check_valid(struct super_block *sb, int novrs, int silent)
|
|
{
|
|
long block;
|
|
|
|
if (novrs) {
|
|
udf_debug("Validity check skipped because of novrs option\n");
|
|
return 0;
|
|
}
|
|
/* Check that it is NSR02 compliant */
|
|
/* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
|
|
else {
|
|
block = udf_vrs(sb, silent);
|
|
if (block == -1) {
|
|
struct udf_sb_info *sbi = UDF_SB(sb);
|
|
udf_debug("Failed to read byte 32768. Assuming open "
|
|
"disc. Skipping validity check\n");
|
|
if (!sbi->s_last_block)
|
|
sbi->s_last_block = udf_get_last_block(sb);
|
|
return 0;
|
|
} else
|
|
return !block;
|
|
}
|
|
}
|
|
|
|
static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
|
|
{
|
|
struct anchorVolDescPtr *anchor;
|
|
uint16_t ident;
|
|
struct buffer_head *bh;
|
|
long main_s, main_e, reserve_s, reserve_e;
|
|
int i, j;
|
|
struct udf_sb_info *sbi;
|
|
|
|
if (!sb)
|
|
return 1;
|
|
sbi = UDF_SB(sb);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
|
|
if (sbi->s_anchor[i] &&
|
|
(bh = udf_read_tagged(sb, sbi->s_anchor[i],
|
|
sbi->s_anchor[i], &ident))) {
|
|
anchor = (struct anchorVolDescPtr *)bh->b_data;
|
|
|
|
/* Locate the main sequence */
|
|
main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
|
|
main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
|
|
main_e = main_e >> sb->s_blocksize_bits;
|
|
main_e += main_s;
|
|
|
|
/* Locate the reserve sequence */
|
|
reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
|
|
reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
|
|
reserve_e = reserve_e >> sb->s_blocksize_bits;
|
|
reserve_e += reserve_s;
|
|
|
|
brelse(bh);
|
|
|
|
/* Process the main & reserve sequences */
|
|
/* responsible for finding the PartitionDesc(s) */
|
|
if (!(udf_process_sequence(sb, main_s, main_e, fileset) &&
|
|
udf_process_sequence(sb, reserve_s, reserve_e, fileset)))
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(sbi->s_anchor)) {
|
|
udf_debug("No Anchor block found\n");
|
|
return 1;
|
|
} else
|
|
udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
|
|
|
|
for (i = 0; i < sbi->s_partitions; i++) {
|
|
kernel_lb_addr uninitialized_var(ino);
|
|
struct udf_part_map *map = &sbi->s_partmaps[i];
|
|
switch (map->s_partition_type) {
|
|
case UDF_VIRTUAL_MAP15:
|
|
case UDF_VIRTUAL_MAP20:
|
|
if (!sbi->s_last_block) {
|
|
sbi->s_last_block = udf_get_last_block(sb);
|
|
udf_find_anchor(sb);
|
|
}
|
|
|
|
if (!sbi->s_last_block) {
|
|
udf_debug("Unable to determine Lastblock (For "
|
|
"Virtual Partition)\n");
|
|
return 1;
|
|
}
|
|
|
|
for (j = 0; j < sbi->s_partitions; j++) {
|
|
struct udf_part_map *map2 = &sbi->s_partmaps[j];
|
|
if (j != i &&
|
|
map->s_volumeseqnum == map2->s_volumeseqnum &&
|
|
map->s_partition_num == map2->s_partition_num) {
|
|
ino.partitionReferenceNum = j;
|
|
ino.logicalBlockNum = sbi->s_last_block - map2->s_partition_root;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (j == sbi->s_partitions)
|
|
return 1;
|
|
|
|
sbi->s_vat_inode = udf_iget(sb, ino);
|
|
if (!sbi->s_vat_inode)
|
|
return 1;
|
|
|
|
if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
|
|
map->s_type_specific.s_virtual.s_start_offset =
|
|
udf_ext0_offset(sbi->s_vat_inode);
|
|
map->s_type_specific.s_virtual.s_num_entries =
|
|
(sbi->s_vat_inode->i_size - 36) >> 2;
|
|
} else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
|
|
struct buffer_head *bh = NULL;
|
|
uint32_t pos;
|
|
|
|
pos = udf_block_map(sbi->s_vat_inode, 0);
|
|
bh = sb_bread(sb, pos);
|
|
if (!bh)
|
|
return 1;
|
|
map->s_type_specific.s_virtual.s_start_offset =
|
|
le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data +
|
|
udf_ext0_offset(sbi->s_vat_inode))->lengthHeader) +
|
|
udf_ext0_offset(sbi->s_vat_inode);
|
|
map->s_type_specific.s_virtual.s_num_entries = (sbi->s_vat_inode->i_size -
|
|
map->s_type_specific.s_virtual.s_start_offset) >> 2;
|
|
brelse(bh);
|
|
}
|
|
map->s_partition_root = udf_get_pblock(sb, 0, i, 0);
|
|
map->s_partition_len =
|
|
sbi->s_partmaps[ino.partitionReferenceNum].
|
|
s_partition_len;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void udf_open_lvid(struct super_block *sb)
|
|
{
|
|
struct udf_sb_info *sbi = UDF_SB(sb);
|
|
struct buffer_head *bh = sbi->s_lvid_bh;
|
|
if (bh) {
|
|
int i;
|
|
kernel_timestamp cpu_time;
|
|
struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
|
|
struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi);
|
|
|
|
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
|
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
|
if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
|
|
lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
|
|
lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
|
|
|
|
lvid->descTag.descCRC = cpu_to_le16(udf_crc((char *)lvid + sizeof(tag),
|
|
le16_to_cpu(lvid->descTag.descCRCLength), 0));
|
|
|
|
lvid->descTag.tagChecksum = 0;
|
|
for (i = 0; i < 16; i++)
|
|
if (i != 4)
|
|
lvid->descTag.tagChecksum +=
|
|
((uint8_t *) &(lvid->descTag))[i];
|
|
|
|
mark_buffer_dirty(bh);
|
|
}
|
|
}
|
|
|
|
static void udf_close_lvid(struct super_block *sb)
|
|
{
|
|
kernel_timestamp cpu_time;
|
|
int i;
|
|
struct udf_sb_info *sbi = UDF_SB(sb);
|
|
struct buffer_head *bh = sbi->s_lvid_bh;
|
|
struct logicalVolIntegrityDesc *lvid;
|
|
|
|
if (!bh)
|
|
return;
|
|
|
|
lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
|
|
|
|
if (lvid->integrityType == LVID_INTEGRITY_TYPE_OPEN) {
|
|
struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi);
|
|
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
|
|
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
|
|
if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
|
|
lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
|
|
if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
|
|
lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
|
|
if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
|
|
lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
|
|
if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
|
|
lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
|
|
lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
|
|
|
|
lvid->descTag.descCRC =
|
|
cpu_to_le16(udf_crc((char *)lvid + sizeof(tag),
|
|
le16_to_cpu(lvid->descTag.descCRCLength), 0));
|
|
|
|
lvid->descTag.tagChecksum = 0;
|
|
for (i = 0; i < 16; i++)
|
|
if (i != 4)
|
|
lvid->descTag.tagChecksum +=
|
|
((uint8_t *)&(lvid->descTag))[i];
|
|
|
|
mark_buffer_dirty(bh);
|
|
}
|
|
}
|
|
|
|
static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
|
|
{
|
|
int i;
|
|
int nr_groups = bitmap->s_nr_groups;
|
|
int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);
|
|
|
|
for (i = 0; i < nr_groups; i++)
|
|
if (bitmap->s_block_bitmap[i])
|
|
brelse(bitmap->s_block_bitmap[i]);
|
|
|
|
if (size <= PAGE_SIZE)
|
|
kfree(bitmap);
|
|
else
|
|
vfree(bitmap);
|
|
}
|
|
|
|
/*
|
|
* udf_read_super
|
|
*
|
|
* PURPOSE
|
|
* Complete the specified super block.
|
|
*
|
|
* PRE-CONDITIONS
|
|
* sb Pointer to superblock to complete - never NULL.
|
|
* sb->s_dev Device to read suberblock from.
|
|
* options Pointer to mount options.
|
|
* silent Silent flag.
|
|
*
|
|
* HISTORY
|
|
* July 1, 1997 - Andrew E. Mileski
|
|
* Written, tested, and released.
|
|
*/
|
|
static int udf_fill_super(struct super_block *sb, void *options, int silent)
|
|
{
|
|
int i;
|
|
struct inode *inode = NULL;
|
|
struct udf_options uopt;
|
|
kernel_lb_addr rootdir, fileset;
|
|
struct udf_sb_info *sbi;
|
|
|
|
uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
|
|
uopt.uid = -1;
|
|
uopt.gid = -1;
|
|
uopt.umask = 0;
|
|
|
|
sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
|
|
if (!sbi)
|
|
return -ENOMEM;
|
|
|
|
sb->s_fs_info = sbi;
|
|
|
|
mutex_init(&sbi->s_alloc_mutex);
|
|
|
|
if (!udf_parse_options((char *)options, &uopt))
|
|
goto error_out;
|
|
|
|
if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
|
|
uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
|
|
udf_error(sb, "udf_read_super",
|
|
"utf8 cannot be combined with iocharset\n");
|
|
goto error_out;
|
|
}
|
|
#ifdef CONFIG_UDF_NLS
|
|
if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
|
|
uopt.nls_map = load_nls_default();
|
|
if (!uopt.nls_map)
|
|
uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
|
|
else
|
|
udf_debug("Using default NLS map\n");
|
|
}
|
|
#endif
|
|
if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
|
|
uopt.flags |= (1 << UDF_FLAG_UTF8);
|
|
|
|
fileset.logicalBlockNum = 0xFFFFFFFF;
|
|
fileset.partitionReferenceNum = 0xFFFF;
|
|
|
|
sbi->s_flags = uopt.flags;
|
|
sbi->s_uid = uopt.uid;
|
|
sbi->s_gid = uopt.gid;
|
|
sbi->s_umask = uopt.umask;
|
|
sbi->s_nls_map = uopt.nls_map;
|
|
|
|
/* Set the block size for all transfers */
|
|
if (!udf_set_blocksize(sb, uopt.blocksize))
|
|
goto error_out;
|
|
|
|
if (uopt.session == 0xFFFFFFFF)
|
|
sbi->s_session = udf_get_last_session(sb);
|
|
else
|
|
sbi->s_session = uopt.session;
|
|
|
|
udf_debug("Multi-session=%d\n", sbi->s_session);
|
|
|
|
sbi->s_last_block = uopt.lastblock;
|
|
sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
|
|
sbi->s_anchor[2] = uopt.anchor;
|
|
sbi->s_anchor[3] = 256;
|
|
|
|
if (udf_check_valid(sb, uopt.novrs, silent)) {
|
|
/* read volume recognition sequences */
|
|
printk(KERN_WARNING "UDF-fs: No VRS found\n");
|
|
goto error_out;
|
|
}
|
|
|
|
udf_find_anchor(sb);
|
|
|
|
/* Fill in the rest of the superblock */
|
|
sb->s_op = &udf_sb_ops;
|
|
sb->dq_op = NULL;
|
|
sb->s_dirt = 0;
|
|
sb->s_magic = UDF_SUPER_MAGIC;
|
|
sb->s_time_gran = 1000;
|
|
|
|
if (udf_load_partition(sb, &fileset)) {
|
|
printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
|
|
goto error_out;
|
|
}
|
|
|
|
udf_debug("Lastblock=%d\n", sbi->s_last_block);
|
|
|
|
if (sbi->s_lvid_bh) {
|
|
struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi);
|
|
uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
|
|
uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
|
|
/* uint16_t maxUDFWriteRev = le16_to_cpu(lvidiu->maxUDFWriteRev); */
|
|
|
|
if (minUDFReadRev > UDF_MAX_READ_VERSION) {
|
|
printk(KERN_ERR "UDF-fs: minUDFReadRev=%x (max is %x)\n",
|
|
le16_to_cpu(lvidiu->minUDFReadRev),
|
|
UDF_MAX_READ_VERSION);
|
|
goto error_out;
|
|
} else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) {
|
|
sb->s_flags |= MS_RDONLY;
|
|
}
|
|
|
|
sbi->s_udfrev = minUDFWriteRev;
|
|
|
|
if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
|
|
UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
|
|
if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
|
|
UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
|
|
}
|
|
|
|
if (!sbi->s_partitions) {
|
|
printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
|
|
goto error_out;
|
|
}
|
|
|
|
if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & UDF_PART_FLAG_READ_ONLY) {
|
|
printk(KERN_NOTICE "UDF-fs: Partition marked readonly; forcing readonly mount\n");
|
|
sb->s_flags |= MS_RDONLY;
|
|
}
|
|
|
|
if (udf_find_fileset(sb, &fileset, &rootdir)) {
|
|
printk(KERN_WARNING "UDF-fs: No fileset found\n");
|
|
goto error_out;
|
|
}
|
|
|
|
if (!silent) {
|
|
kernel_timestamp ts;
|
|
udf_time_to_stamp(&ts, sbi->s_record_time);
|
|
udf_info("UDF %s (%s) Mounting volume '%s', "
|
|
"timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
|
|
UDFFS_VERSION, UDFFS_DATE,
|
|
sbi->s_volume_ident, ts.year, ts.month, ts.day,
|
|
ts.hour, ts.minute, ts.typeAndTimezone);
|
|
}
|
|
if (!(sb->s_flags & MS_RDONLY))
|
|
udf_open_lvid(sb);
|
|
|
|
/* Assign the root inode */
|
|
/* assign inodes by physical block number */
|
|
/* perhaps it's not extensible enough, but for now ... */
|
|
inode = udf_iget(sb, rootdir);
|
|
if (!inode) {
|
|
printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, partition=%d\n",
|
|
rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
|
|
goto error_out;
|
|
}
|
|
|
|
/* Allocate a dentry for the root inode */
|
|
sb->s_root = d_alloc_root(inode);
|
|
if (!sb->s_root) {
|
|
printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
|
|
iput(inode);
|
|
goto error_out;
|
|
}
|
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
|
return 0;
|
|
|
|
error_out:
|
|
if (sbi->s_vat_inode)
|
|
iput(sbi->s_vat_inode);
|
|
if (sbi->s_partitions) {
|
|
struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
|
|
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
|
|
iput(map->s_uspace.s_table);
|
|
if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
|
|
iput(map->s_fspace.s_table);
|
|
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
|
|
udf_sb_free_bitmap(map->s_uspace.s_bitmap);
|
|
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
|
|
udf_sb_free_bitmap(map->s_fspace.s_bitmap);
|
|
if (map->s_partition_type == UDF_SPARABLE_MAP15)
|
|
for (i = 0; i < 4; i++)
|
|
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
|
|
}
|
|
#ifdef CONFIG_UDF_NLS
|
|
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
|
unload_nls(sbi->s_nls_map);
|
|
#endif
|
|
if (!(sb->s_flags & MS_RDONLY))
|
|
udf_close_lvid(sb);
|
|
brelse(sbi->s_lvid_bh);
|
|
|
|
kfree(sbi->s_partmaps);
|
|
kfree(sbi);
|
|
sb->s_fs_info = NULL;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
void udf_error(struct super_block *sb, const char *function,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
|
/* mark sb error */
|
|
sb->s_dirt = 1;
|
|
}
|
|
va_start(args, fmt);
|
|
vsnprintf(error_buf, sizeof(error_buf), fmt, args);
|
|
va_end(args);
|
|
printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
|
|
sb->s_id, function, error_buf);
|
|
}
|
|
|
|
void udf_warning(struct super_block *sb, const char *function,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start(args, fmt);
|
|
vsnprintf(error_buf, sizeof(error_buf), fmt, args);
|
|
va_end(args);
|
|
printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
|
|
sb->s_id, function, error_buf);
|
|
}
|
|
|
|
/*
|
|
* udf_put_super
|
|
*
|
|
* PURPOSE
|
|
* Prepare for destruction of the superblock.
|
|
*
|
|
* DESCRIPTION
|
|
* Called before the filesystem is unmounted.
|
|
*
|
|
* HISTORY
|
|
* July 1, 1997 - Andrew E. Mileski
|
|
* Written, tested, and released.
|
|
*/
|
|
static void udf_put_super(struct super_block *sb)
|
|
{
|
|
int i;
|
|
struct udf_sb_info *sbi;
|
|
|
|
sbi = UDF_SB(sb);
|
|
if (sbi->s_vat_inode)
|
|
iput(sbi->s_vat_inode);
|
|
if (sbi->s_partitions) {
|
|
struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
|
|
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
|
|
iput(map->s_uspace.s_table);
|
|
if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
|
|
iput(map->s_fspace.s_table);
|
|
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
|
|
udf_sb_free_bitmap(map->s_uspace.s_bitmap);
|
|
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
|
|
udf_sb_free_bitmap(map->s_fspace.s_bitmap);
|
|
if (map->s_partition_type == UDF_SPARABLE_MAP15)
|
|
for (i = 0; i < 4; i++)
|
|
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
|
|
}
|
|
#ifdef CONFIG_UDF_NLS
|
|
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
|
unload_nls(sbi->s_nls_map);
|
|
#endif
|
|
if (!(sb->s_flags & MS_RDONLY))
|
|
udf_close_lvid(sb);
|
|
brelse(sbi->s_lvid_bh);
|
|
kfree(sbi->s_partmaps);
|
|
kfree(sb->s_fs_info);
|
|
sb->s_fs_info = NULL;
|
|
}
|
|
|
|
/*
|
|
* udf_stat_fs
|
|
*
|
|
* PURPOSE
|
|
* Return info about the filesystem.
|
|
*
|
|
* DESCRIPTION
|
|
* Called by sys_statfs()
|
|
*
|
|
* HISTORY
|
|
* July 1, 1997 - Andrew E. Mileski
|
|
* Written, tested, and released.
|
|
*/
|
|
static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
{
|
|
struct super_block *sb = dentry->d_sb;
|
|
struct udf_sb_info *sbi = UDF_SB(sb);
|
|
struct logicalVolIntegrityDescImpUse *lvidiu;
|
|
|
|
if (sbi->s_lvid_bh != NULL)
|
|
lvidiu = udf_sb_lvidiu(sbi);
|
|
else
|
|
lvidiu = NULL;
|
|
|
|
buf->f_type = UDF_SUPER_MAGIC;
|
|
buf->f_bsize = sb->s_blocksize;
|
|
buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
|
|
buf->f_bfree = udf_count_free(sb);
|
|
buf->f_bavail = buf->f_bfree;
|
|
buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
|
|
le32_to_cpu(lvidiu->numDirs)) : 0)
|
|
+ buf->f_bfree;
|
|
buf->f_ffree = buf->f_bfree;
|
|
/* __kernel_fsid_t f_fsid */
|
|
buf->f_namelen = UDF_NAME_LEN - 2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned char udf_bitmap_lookup[16] = {
|
|
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
|
|
};
|
|
|
|
static unsigned int udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap)
|
|
{
|
|
struct buffer_head *bh = NULL;
|
|
unsigned int accum = 0;
|
|
int index;
|
|
int block = 0, newblock;
|
|
kernel_lb_addr loc;
|
|
uint32_t bytes;
|
|
uint8_t value;
|
|
uint8_t *ptr;
|
|
uint16_t ident;
|
|
struct spaceBitmapDesc *bm;
|
|
|
|
lock_kernel();
|
|
|
|
loc.logicalBlockNum = bitmap->s_extPosition;
|
|
loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
|
|
bh = udf_read_ptagged(sb, loc, 0, &ident);
|
|
|
|
if (!bh) {
|
|
printk(KERN_ERR "udf: udf_count_free failed\n");
|
|
goto out;
|
|
} else if (ident != TAG_IDENT_SBD) {
|
|
brelse(bh);
|
|
printk(KERN_ERR "udf: udf_count_free failed\n");
|
|
goto out;
|
|
}
|
|
|
|
bm = (struct spaceBitmapDesc *)bh->b_data;
|
|
bytes = le32_to_cpu(bm->numOfBytes);
|
|
index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
|
|
ptr = (uint8_t *)bh->b_data;
|
|
|
|
while (bytes > 0) {
|
|
while ((bytes > 0) && (index < sb->s_blocksize)) {
|
|
value = ptr[index];
|
|
accum += udf_bitmap_lookup[value & 0x0f];
|
|
accum += udf_bitmap_lookup[value >> 4];
|
|
index++;
|
|
bytes--;
|
|
}
|
|
if (bytes) {
|
|
brelse(bh);
|
|
newblock = udf_get_lb_pblock(sb, loc, ++block);
|
|
bh = udf_tread(sb, newblock);
|
|
if (!bh) {
|
|
udf_debug("read failed\n");
|
|
goto out;
|
|
}
|
|
index = 0;
|
|
ptr = (uint8_t *)bh->b_data;
|
|
}
|
|
}
|
|
brelse(bh);
|
|
|
|
out:
|
|
unlock_kernel();
|
|
|
|
return accum;
|
|
}
|
|
|
|
static unsigned int udf_count_free_table(struct super_block *sb, struct inode *table)
|
|
{
|
|
unsigned int accum = 0;
|
|
uint32_t elen;
|
|
kernel_lb_addr eloc;
|
|
int8_t etype;
|
|
struct extent_position epos;
|
|
|
|
lock_kernel();
|
|
|
|
epos.block = UDF_I_LOCATION(table);
|
|
epos.offset = sizeof(struct unallocSpaceEntry);
|
|
epos.bh = NULL;
|
|
|
|
while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
|
|
accum += (elen >> table->i_sb->s_blocksize_bits);
|
|
|
|
brelse(epos.bh);
|
|
|
|
unlock_kernel();
|
|
|
|
return accum;
|
|
}
|
|
|
|
static unsigned int udf_count_free(struct super_block *sb)
|
|
{
|
|
unsigned int accum = 0;
|
|
struct udf_sb_info *sbi;
|
|
struct udf_part_map *map;
|
|
|
|
sbi = UDF_SB(sb);
|
|
if (sbi->s_lvid_bh) {
|
|
struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
|
|
if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
|
|
accum = le32_to_cpu(lvid->freeSpaceTable[sbi->s_partition]);
|
|
if (accum == 0xFFFFFFFF)
|
|
accum = 0;
|
|
}
|
|
}
|
|
|
|
if (accum)
|
|
return accum;
|
|
|
|
map = &sbi->s_partmaps[sbi->s_partition];
|
|
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
|
|
accum += udf_count_free_bitmap(sb,
|
|
map->s_uspace.s_bitmap);
|
|
}
|
|
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
|
|
accum += udf_count_free_bitmap(sb,
|
|
map->s_fspace.s_bitmap);
|
|
}
|
|
if (accum)
|
|
return accum;
|
|
|
|
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
|
|
accum += udf_count_free_table(sb,
|
|
map->s_uspace.s_table);
|
|
}
|
|
if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
|
|
accum += udf_count_free_table(sb,
|
|
map->s_fspace.s_table);
|
|
}
|
|
|
|
return accum;
|
|
}
|