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super.c
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super.c
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/*
* super.c
*
* PURPOSE
* Super block routines for the OSTA-UDF(tm) filesystem.
*
* DESCRIPTION
* OSTA-UDF(tm) = Optical Storage Technology Association
* Universal Disk Format.
*
* This code is based on version 2.00 of the UDF specification,
* and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
* http://www.osta.org/
* http://www.ecma.ch/
* http://www.iso.org/
*
* CONTACTS
* E-mail regarding any portion of the Linux UDF file system should be
* directed to the development team mailing list (run by majordomo):
*
* COPYRIGHT
* This file is distributed under the terms of the GNU General Public
* License (GPL). Copies of the GPL can be obtained from:
* ftp://prep.ai.mit.edu/pub/gnu/GPL
* Each contributing author retains all rights to their own work.
*
* (C) 1998 Dave Boynton
* (C) 1998-2004 Ben Fennema
* (C) 2000 Stelias Computing Inc
*
* HISTORY
*
* 09/24/98 dgb changed to allow compiling outside of kernel, and
* added some debugging.
* 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
* 10/16/98 attempting some multi-session support
* 10/17/98 added freespace count for "df"
* 11/11/98 gr added novrs option
* 11/26/98 dgb added fileset,anchor mount options
* 12/06/98 blf really hosed things royally. vat/sparing support. sequenced vol descs
* rewrote option handling based on isofs
* 12/20/98 find the free space bitmap (if it exists)
*/
#include "udfdecl.h"
#include <linux/config.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/parser.h>
#include <linux/stat.h>
#include <linux/cdrom.h>
#include <linux/nls.h>
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/vmalloc.h>
#include <asm/byteorder.h>
#include <linux/udf_fs.h>
#include "udf_sb.h"
#include "udf_i.h"
#include <linux/init.h>
#include <asm/uaccess.h>
#define VDS_POS_PRIMARY_VOL_DESC 0
#define VDS_POS_UNALLOC_SPACE_DESC 1
#define VDS_POS_LOGICAL_VOL_DESC 2
#define VDS_POS_PARTITION_DESC 3
#define VDS_POS_IMP_USE_VOL_DESC 4
#define VDS_POS_VOL_DESC_PTR 5
#define VDS_POS_TERMINATING_DESC 6
#define VDS_POS_LENGTH 7
static char error_buf[1024];
/* These are the "meat" - everything else is stuffing */
static int udf_fill_super(struct super_block *, void *, int);
static void udf_put_super(struct super_block *);
static void udf_write_super(struct super_block *);
static int udf_remount_fs(struct super_block *, int *, char *);
static int udf_check_valid(struct super_block *, int, int);
static int udf_vrs(struct super_block *sb, int silent);
static int udf_load_partition(struct super_block *, kernel_lb_addr *);
static int udf_load_logicalvol(struct super_block *, struct buffer_head *, kernel_lb_addr *);
static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
static void udf_find_anchor(struct super_block *);
static int udf_find_fileset(struct super_block *, kernel_lb_addr *, kernel_lb_addr *);
static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
static void udf_load_fileset(struct super_block *, struct buffer_head *, kernel_lb_addr *);
static void udf_load_partdesc(struct super_block *, struct buffer_head *);
static void udf_open_lvid(struct super_block *);
static void udf_close_lvid(struct super_block *);
static unsigned int udf_count_free(struct super_block *);
static int udf_statfs(struct super_block *, struct kstatfs *);
/* UDF filesystem type */
static struct super_block *udf_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super);
}
static struct file_system_type udf_fstype = {
.owner = THIS_MODULE,
.name = "udf",
.get_sb = udf_get_sb,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
static kmem_cache_t * udf_inode_cachep;
static struct inode *udf_alloc_inode(struct super_block *sb)
{
struct udf_inode_info *ei;
ei = (struct udf_inode_info *)kmem_cache_alloc(udf_inode_cachep, SLAB_KERNEL);
if (!ei)
return NULL;
return &ei->vfs_inode;
}
static void udf_destroy_inode(struct inode *inode)
{
kmem_cache_free(udf_inode_cachep, UDF_I(inode));
}
static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
{
struct udf_inode_info *ei = (struct udf_inode_info *) foo;
if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
SLAB_CTOR_CONSTRUCTOR)
{
ei->i_ext.i_data = NULL;
inode_init_once(&ei->vfs_inode);
}
}
static int init_inodecache(void)
{
udf_inode_cachep = kmem_cache_create("udf_inode_cache",
sizeof(struct udf_inode_info),
0, SLAB_RECLAIM_ACCOUNT,
init_once, NULL);
if (udf_inode_cachep == NULL)
return -ENOMEM;
return 0;
}
static void destroy_inodecache(void)
{
if (kmem_cache_destroy(udf_inode_cachep))
printk(KERN_INFO "udf_inode_cache: not all structures were freed\n");
}
/* Superblock operations */
static struct super_operations udf_sb_ops = {
.alloc_inode = udf_alloc_inode,
.destroy_inode = udf_destroy_inode,
.write_inode = udf_write_inode,
.delete_inode = udf_delete_inode,
.clear_inode = udf_clear_inode,
.put_super = udf_put_super,
.write_super = udf_write_super,
.statfs = udf_statfs,
.remount_fs = udf_remount_fs,
};
struct udf_options
{
unsigned char novrs;
unsigned int blocksize;
unsigned int session;
unsigned int lastblock;
unsigned int anchor;
unsigned int volume;
unsigned short partition;
unsigned int fileset;
unsigned int rootdir;
unsigned int flags;
mode_t umask;
gid_t gid;
uid_t uid;
struct nls_table *nls_map;
};
static int __init init_udf_fs(void)
{
int err;
err = init_inodecache();
if (err)
goto out1;
err = register_filesystem(&udf_fstype);
if (err)
goto out;
return 0;
out:
destroy_inodecache();
out1:
return err;
}
static void __exit exit_udf_fs(void)
{
unregister_filesystem(&udf_fstype);
destroy_inodecache();
}
module_init(init_udf_fs)
module_exit(exit_udf_fs)
/*
* udf_parse_options
*
* PURPOSE
* Parse mount options.
*
* DESCRIPTION
* The following mount options are supported:
*
* gid= Set the default group.
* umask= Set the default umask.
* uid= Set the default user.
* bs= Set the block size.
* unhide Show otherwise hidden files.
* undelete Show deleted files in lists.
* adinicb Embed data in the inode (default)
* noadinicb Don't embed data in the inode
* shortad Use short ad's
* longad Use long ad's (default)
* nostrict Unset strict conformance
* iocharset= Set the NLS character set
*
* The remaining are for debugging and disaster recovery:
*
* novrs Skip volume sequence recognition
*
* The following expect a offset from 0.
*
* session= Set the CDROM session (default= last session)
* anchor= Override standard anchor location. (default= 256)
* volume= Override the VolumeDesc location. (unused)
* partition= Override the PartitionDesc location. (unused)
* lastblock= Set the last block of the filesystem/
*
* The following expect a offset from the partition root.
*
* fileset= Override the fileset block location. (unused)
* rootdir= Override the root directory location. (unused)
* WARNING: overriding the rootdir to a non-directory may
* yield highly unpredictable results.
*
* PRE-CONDITIONS
* options Pointer to mount options string.
* uopts Pointer to mount options variable.
*
* POST-CONDITIONS
* <return> 1 Mount options parsed okay.
* <return> 0 Error parsing mount options.
*
* HISTORY
* July 1, 1997 - Andrew E. Mileski
* Written, tested, and released.
*/
enum {
Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
Opt_rootdir, Opt_utf8, Opt_iocharset,
Opt_err
};
static match_table_t tokens = {
{Opt_novrs, "novrs"},
{Opt_nostrict, "nostrict"},
{Opt_bs, "bs=%u"},
{Opt_unhide, "unhide"},
{Opt_undelete, "undelete"},
{Opt_noadinicb, "noadinicb"},
{Opt_adinicb, "adinicb"},
{Opt_shortad, "shortad"},
{Opt_longad, "longad"},
{Opt_gid, "gid=%u"},
{Opt_uid, "uid=%u"},
{Opt_umask, "umask=%o"},
{Opt_session, "session=%u"},
{Opt_lastblock, "lastblock=%u"},
{Opt_anchor, "anchor=%u"},
{Opt_volume, "volume=%u"},
{Opt_partition, "partition=%u"},
{Opt_fileset, "fileset=%u"},
{Opt_rootdir, "rootdir=%u"},
{Opt_utf8, "utf8"},
{Opt_iocharset, "iocharset=%s"},
{Opt_err, NULL}
};
static int
udf_parse_options(char *options, struct udf_options *uopt)
{
char *p;
int option;
uopt->novrs = 0;
uopt->blocksize = 2048;
uopt->partition = 0xFFFF;
uopt->session = 0xFFFFFFFF;
uopt->lastblock = 0;
uopt->anchor = 0;
uopt->volume = 0xFFFFFFFF;
uopt->rootdir = 0xFFFFFFFF;
uopt->fileset = 0xFFFFFFFF;
uopt->nls_map = NULL;
if (!options)
return 1;
while ((p = strsep(&options, ",")) != NULL)
{
substring_t args[MAX_OPT_ARGS];
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
switch (token)
{
case Opt_novrs:
uopt->novrs = 1;
case Opt_bs:
if (match_int(&args[0], &option))
return 0;
uopt->blocksize = option;
break;
case Opt_unhide:
uopt->flags |= (1 << UDF_FLAG_UNHIDE);
break;
case Opt_undelete:
uopt->flags |= (1 << UDF_FLAG_UNDELETE);
break;
case Opt_noadinicb:
uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
break;
case Opt_adinicb:
uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
break;
case Opt_shortad:
uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
break;
case Opt_longad:
uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
break;
case Opt_gid:
if (match_int(args, &option))
return 0;
uopt->gid = option;
break;
case Opt_uid:
if (match_int(args, &option))
return 0;
uopt->uid = option;
break;
case Opt_umask:
if (match_octal(args, &option))
return 0;
uopt->umask = option;
break;
case Opt_nostrict:
uopt->flags &= ~(1 << UDF_FLAG_STRICT);
break;
case Opt_session:
if (match_int(args, &option))
return 0;
uopt->session = option;
break;
case Opt_lastblock:
if (match_int(args, &option))
return 0;
uopt->lastblock = option;
break;
case Opt_anchor:
if (match_int(args, &option))
return 0;
uopt->anchor = option;
break;
case Opt_volume:
if (match_int(args, &option))
return 0;
uopt->volume = option;
break;
case Opt_partition:
if (match_int(args, &option))
return 0;
uopt->partition = option;
break;
case Opt_fileset:
if (match_int(args, &option))
return 0;
uopt->fileset = option;
break;
case Opt_rootdir:
if (match_int(args, &option))
return 0;
uopt->rootdir = option;
break;
case Opt_utf8:
uopt->flags |= (1 << UDF_FLAG_UTF8);
break;
#ifdef CONFIG_UDF_NLS
case Opt_iocharset:
uopt->nls_map = load_nls(args[0].from);
uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
break;
#endif
default:
printk(KERN_ERR "udf: bad mount option \"%s\" "
"or missing value\n", p);
return 0;
}
}
return 1;
}
void
udf_write_super(struct super_block *sb)
{
lock_kernel();
if (!(sb->s_flags & MS_RDONLY))
udf_open_lvid(sb);
sb->s_dirt = 0;
unlock_kernel();
}
static int
udf_remount_fs(struct super_block *sb, int *flags, char *options)
{
struct udf_options uopt;
uopt.flags = UDF_SB(sb)->s_flags ;
uopt.uid = UDF_SB(sb)->s_uid ;
uopt.gid = UDF_SB(sb)->s_gid ;
uopt.umask = UDF_SB(sb)->s_umask ;
if ( !udf_parse_options(options, &uopt) )
return -EINVAL;
UDF_SB(sb)->s_flags = uopt.flags;
UDF_SB(sb)->s_uid = uopt.uid;
UDF_SB(sb)->s_gid = uopt.gid;
UDF_SB(sb)->s_umask = uopt.umask;
if (UDF_SB_LVIDBH(sb)) {
int write_rev = le16_to_cpu(UDF_SB_LVIDIU(sb)->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;
/* Block size must be a multiple of 512 */
if (sb->s_blocksize & 511)
return 0;
if (sb->s_blocksize < sizeof(struct volStructDesc))
sectorsize = sizeof(struct volStructDesc);
else
sectorsize = sb->s_blocksize;
sector += (UDF_SB_SESSION(sb) << 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)
{
udf_release_data(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))
{
}
else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, VSD_STD_ID_LEN))
{
udf_release_data(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;
}
udf_release_data(bh);
}
if (nsr03)
return nsr03;
else if (nsr02)
return nsr02;
else if (sector - (UDF_SB_SESSION(sb) << 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 = UDF_SB_LASTBLOCK(sb);
struct buffer_head *bh = NULL;
uint16_t ident;
uint32_t location;
int i;
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<sizeof(last)/sizeof(int)); i++)
{
if (last[i] < 0 || !(bh = sb_bread(sb, last[i])))
{
ident = location = 0;
}
else
{
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
udf_release_data(bh);
}
if (ident == TAG_IDENT_AVDP)
{
if (location == last[i] - UDF_SB_SESSION(sb))
{
lastblock = UDF_SB_ANCHOR(sb)[0] = last[i] - UDF_SB_SESSION(sb);
UDF_SB_ANCHOR(sb)[1] = last[i] - 256 - UDF_SB_SESSION(sb);
}
else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb))
{
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb);
UDF_SB_ANCHOR(sb)[1] = lastblock - 256 - UDF_SB_SESSION(sb);
}
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];
UDF_SB_ANCHOR(sb)[3] = 512;
}
else
{
if (last[i] < 256 || !(bh = sb_bread(sb, last[i] - 256)))
{
ident = location = 0;
}
else
{
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
udf_release_data(bh);
}
if (ident == TAG_IDENT_AVDP &&
location == last[i] - 256 - UDF_SB_SESSION(sb))
{
lastblock = last[i];
UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
}
else
{
if (last[i] < 312 + UDF_SB_SESSION(sb) || !(bh = sb_bread(sb, last[i] - 312 - UDF_SB_SESSION(sb))))
{
ident = location = 0;
}
else
{
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
udf_release_data(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]);
UDF_SB_ANCHOR(sb)[1] = lastblock - 256;
}
}
}
}
}
if (!lastblock)
{
/* We havn't found the lastblock. check 312 */
if ((bh = sb_bread(sb, 312 + UDF_SB_SESSION(sb))))
{
ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
udf_release_data(bh);
if (ident == TAG_IDENT_AVDP && location == 256)
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
}
}
for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
{
if (UDF_SB_ANCHOR(sb)[i])
{
if (!(bh = udf_read_tagged(sb,
UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident)))
{
UDF_SB_ANCHOR(sb)[i] = 0;
}
else
{
udf_release_data(bh);
if ((ident != TAG_IDENT_AVDP) && (i ||
(ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE)))
{
UDF_SB_ANCHOR(sb)[i] = 0;
}
}
}
}
UDF_SB_LASTBLOCK(sb) = 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;
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)
{
udf_release_data(bh);
return 1;
}
}
if (!bh) /* Search backwards through the partitions */
{
kernel_lb_addr newfileset;
return 1;
for (newfileset.partitionReferenceNum=UDF_SB_NUMPARTS(sb)-1;
(newfileset.partitionReferenceNum != 0xFFFF &&
fileset->logicalBlockNum == 0xFFFFFFFF &&
fileset->partitionReferenceNum == 0xFFFF);
newfileset.partitionReferenceNum--)
{
lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum);
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);
udf_release_data(bh);
break;
}
case TAG_IDENT_FSD:
{
*fileset = newfileset;
break;
}
default:
{
newfileset.logicalBlockNum ++;
udf_release_data(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);
UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum;
udf_load_fileset(sb, bh, root);
udf_release_data(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_RECORDTIME(sb).tv_sec = recording;
UDF_SB_RECORDTIME(sb).tv_nsec = recording_usec * 1000;
}
if ( !udf_build_ustr(&instr, pvoldesc->volIdent, 32) )
{
if (udf_CS0toUTF8(&outstr, &instr))
{
strncpy( UDF_SB_VOLIDENT(sb), outstr.u_name,
outstr.u_len > 31 ? 31 : outstr.u_len);
udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb));
}
}
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_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum);
udf_debug("Rootdir at block=%d, partition=%d\n",
root->logicalBlockNum, root->partitionReferenceNum);
}
static void
udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
{
struct partitionDesc *p;
int i;
p = (struct partitionDesc *)bh->b_data;
for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
{
udf_debug("Searching map: (%d == %d)\n",
UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber));
if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber))
{
UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */
UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation);
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY)
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_READ_ONLY;
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE)
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_WRITE_ONCE;
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE)
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_REWRITABLE;
if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE)
UDF_SB_PARTFLAGS(sb,i) |= 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 = { le32_to_cpu(phd->unallocSpaceTable.extPosition), i };
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table =
udf_iget(sb, loc);
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_TABLE;
udf_debug("unallocSpaceTable (part %d) @ %ld\n",
i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino);
}
if (phd->unallocSpaceBitmap.extLength)
{
UDF_SB_ALLOC_BITMAP(sb, i, s_uspace);
if (UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap != NULL)
{
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extLength =
le32_to_cpu(phd->unallocSpaceBitmap.extLength);
UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition =
le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP;
udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
i, UDF_SB_PARTMAPS(sb)[i].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 = { le32_to_cpu(phd->freedSpaceTable.extPosition), i };
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table =
udf_iget(sb, loc);
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_TABLE;
udf_debug("freedSpaceTable (part %d) @ %ld\n",
i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table->i_ino);
}
if (phd->freedSpaceBitmap.extLength)
{
UDF_SB_ALLOC_BITMAP(sb, i, s_fspace);
if (UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap != NULL)
{
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extLength =
le32_to_cpu(phd->freedSpaceBitmap.extLength);
UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition =
le32_to_cpu(phd->freedSpaceBitmap.extPosition);
UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP;
udf_debug("freedSpaceBitmap (part %d) @ %d\n",
i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition);
}
}
}
break;
}
}