super.c
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上传日期:2013-02-24
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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):
- * linux_udf@hpesjro.fc.hp.com
- *
- * 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) 1998-2000 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/version.h>
- #include <linux/blkdev.h>
- #include <linux/slab.h>
- #include <linux/kernel.h>
- #include <linux/locks.h>
- #include <linux/module.h>
- #include <linux/stat.h>
- #include <linux/cdrom.h>
- #include <linux/nls.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 struct super_block *udf_read_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 *, lb_addr *);
- static int udf_load_logicalvol(struct super_block *, struct buffer_head *, lb_addr *);
- static void udf_load_logicalvolint(struct super_block *, extent_ad);
- static void udf_find_anchor(struct super_block *);
- static int udf_find_fileset(struct super_block *, lb_addr *, lb_addr *);
- static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
- static void udf_load_fileset(struct super_block *, struct buffer_head *, 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 statfs *);
- /* UDF filesystem type */
- static DECLARE_FSTYPE_DEV(udf_fstype, "udf", udf_read_super);
- /* Superblock operations */
- static struct super_operations udf_sb_ops = {
- read_inode: udf_read_inode,
- write_inode: udf_write_inode,
- put_inode: udf_put_inode,
- delete_inode: udf_delete_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)
- {
- printk(KERN_NOTICE "udf: registering filesystemn");
- return register_filesystem(&udf_fstype);
- }
- static void __exit exit_udf_fs(void)
- {
- printk(KERN_NOTICE "udf: unregistering filesystemn");
- unregister_filesystem(&udf_fstype);
- }
- EXPORT_NO_SYMBOLS;
- 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> 0 Mount options parsed okay.
- * <return> -1 Error parsing mount options.
- *
- * HISTORY
- * July 1, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- */
- static int
- udf_parse_options(char *options, struct udf_options *uopt)
- {
- char *opt, *val;
- 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;
- for (opt = strtok(options, ","); opt; opt = strtok(NULL, ","))
- {
- /* Make "opt=val" into two strings */
- val = strchr(opt, '=');
- if (val)
- *(val++) = 0;
- if (!strcmp(opt, "novrs") && !val)
- uopt->novrs = 1;
- else if (!strcmp(opt, "bs") && val)
- uopt->blocksize = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "unhide") && !val)
- uopt->flags |= (1 << UDF_FLAG_UNHIDE);
- else if (!strcmp(opt, "undelete") && !val)
- uopt->flags |= (1 << UDF_FLAG_UNDELETE);
- else if (!strcmp(opt, "noadinicb") && !val)
- uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
- else if (!strcmp(opt, "adinicb") && !val)
- uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
- else if (!strcmp(opt, "shortad") && !val)
- uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
- else if (!strcmp(opt, "longad") && !val)
- uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
- else if (!strcmp(opt, "gid") && val)
- uopt->gid = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "umask") && val)
- uopt->umask = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "nostrict") && !val)
- uopt->flags &= ~(1 << UDF_FLAG_STRICT);
- else if (!strcmp(opt, "uid") && val)
- uopt->uid = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "session") && val)
- uopt->session = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "lastblock") && val)
- uopt->lastblock = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "anchor") && val)
- uopt->anchor = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "volume") && val)
- uopt->volume = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "partition") && val)
- uopt->partition = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "fileset") && val)
- uopt->fileset = simple_strtoul(val, NULL, 0);
- else if (!strcmp(opt, "rootdir") && val)
- uopt->rootdir = simple_strtoul(val, NULL, 0);
- #ifdef CONFIG_NLS
- else if (!strcmp(opt, "iocharset") && val)
- {
- uopt->nls_map = load_nls(val);
- uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
- }
- #endif
- else if (!strcmp(opt, "utf8") && !val)
- uopt->flags |= (1 << UDF_FLAG_UTF8);
- else if (val)
- {
- printk(KERN_ERR "udf: bad mount option "%s=%s"n",
- opt, val);
- return 0;
- }
- else
- {
- printk(KERN_ERR "udf: bad mount option "%s"n",
- opt);
- return 0;
- }
- }
- return 1;
- }
- void
- udf_write_super(struct super_block *sb)
- {
- if (!(sb->s_flags & MS_RDONLY))
- udf_open_lvid(sb);
- sb->s_dirt = 0;
- }
- 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 UDFFS_RW != 1
- *flags |= MS_RDONLY;
- #endif
- 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)
- {
- /* Use specified block size if specified */
- if (bsize)
- sb->s_blocksize = bsize;
- if (get_hardsect_size(sb->s_dev) > sb->s_blocksize)
- sb->s_blocksize = get_hardsect_size(sb->s_dev);
- /* Block size must be an even multiple of 512 */
- switch (sb->s_blocksize)
- {
- case 512: sb->s_blocksize_bits = 9; break;
- case 1024: sb->s_blocksize_bits = 10; break;
- case 2048: sb->s_blocksize_bits = 11; break;
- case 4096: sb->s_blocksize_bits = 12; break;
- case 8192: sb->s_blocksize_bits = 13; break;
- default:
- {
- udf_debug("Bad block size (%ld)n", sb->s_blocksize);
- printk(KERN_ERR "udf: bad block size (%ld)n", sb->s_blocksize);
- return 0;
- }
- }
- /* Set the block size */
- set_blocksize(sb->s_dev, sb->s_blocksize);
- 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, STD_ID_CD001, STD_ID_LEN))
- {
- iso9660 = sector;
- switch (vsd->structType)
- {
- case 0:
- udf_debug("ISO9660 Boot Record foundn");
- break;
- case 1:
- udf_debug("ISO9660 Primary Volume Descriptor foundn");
- break;
- case 2:
- udf_debug("ISO9660 Supplementary Volume Descriptor foundn");
- break;
- case 3:
- udf_debug("ISO9660 Volume Partition Descriptor foundn");
- break;
- case 255:
- udf_debug("ISO9660 Volume Descriptor Set Terminator foundn");
- break;
- default:
- udf_debug("ISO9660 VRS (%u) foundn", vsd->structType);
- break;
- }
- }
- else if (!strncmp(vsd->stdIdent, STD_ID_BEA01, STD_ID_LEN))
- {
- }
- else if (!strncmp(vsd->stdIdent, STD_ID_TEA01, STD_ID_LEN))
- {
- udf_release_data(bh);
- break;
- }
- else if (!strncmp(vsd->stdIdent, STD_ID_NSR02, STD_ID_LEN))
- {
- nsr02 = sector;
- }
- else if (!strncmp(vsd->stdIdent, STD_ID_NSR03, 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 ident;
- Uint32 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 == TID_ANCHOR_VOL_DESC_PTR)
- {
- if (location == last[i] - UDF_SB_SESSION(sb))
- {
- lastblock = UDF_SB_ANCHOR(sb)[0] = last[i];
- UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
- }
- 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_ANCHOR(sb)[1] = lastblock - 256;
- }
- else
- udf_debug("Anchor found at block %d, location mismatch %d.n",
- last[i], location);
- }
- else if (ident == TID_FILE_ENTRY || ident == TID_EXTENDED_FILE_ENTRY)
- {
- lastblock = last[i];
- UDF_SB_ANCHOR(sb)[3] = 512 + UDF_SB_SESSION(sb);
- }
- 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 == TID_ANCHOR_VOL_DESC_PTR &&
- 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 == TID_ANCHOR_VOL_DESC_PTR &&
- 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 == TID_ANCHOR_VOL_DESC_PTR && 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 != TID_ANCHOR_VOL_DESC_PTR) && (i ||
- (ident != TID_FILE_ENTRY && ident != TID_EXTENDED_FILE_ENTRY)))
- {
- UDF_SB_ANCHOR(sb)[i] = 0;
- }
- }
- }
- }
- UDF_SB_LASTBLOCK(sb) = lastblock;
- }
- static int
- udf_find_fileset(struct super_block *sb, lb_addr *fileset, lb_addr *root)
- {
- struct buffer_head *bh = NULL;
- long lastblock;
- Uint16 ident;
- if (fileset->logicalBlockNum != 0xFFFFFFFF ||
- fileset->partitionReferenceNum != 0xFFFF)
- {
- bh = udf_read_ptagged(sb, *fileset, 0, &ident);
- if (!bh)
- return 1;
- else if (ident != TID_FILE_SET_DESC)
- {
- udf_release_data(bh);
- return 1;
- }
-
- }
- if (!bh) /* Search backwards through the partitions */
- {
- 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 TID_SPACE_BITMAP_DESC:
- {
- 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 TID_FILE_SET_DESC:
- {
- *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=%dn",
- 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)) )
- {
- 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) = recording;
- }
- 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, 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=%dn",
- 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) + UDF_SB_SESSION(sb);
- if (!strcmp(p->partitionContents.ident, PARTITION_CONTENTS_NSR02) ||
- !strcmp(p->partitionContents.ident, PARTITION_CONTENTS_NSR03))
- {
- struct PartitionHeaderDesc *phd;
- phd = (struct PartitionHeaderDesc *)(p->partitionContentsUse);
- if (phd->unallocatedSpaceTable.extLength)
- {
- lb_addr loc = { le32_to_cpu(phd->unallocatedSpaceTable.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("unallocatedSpaceTable (part %d) @ %ldn",
- i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino);
- }
- if (phd->unallocatedSpaceBitmap.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->unallocatedSpaceBitmap.extLength);
- UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition =
- le32_to_cpu(phd->unallocatedSpaceBitmap.extPosition);
- UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP;
- udf_debug("unallocatedSpaceBitmap (part %d) @ %dn",
- 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)
- {
- 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) @ %ldn",
- 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) @ %dn",
- i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition);
- }
- }
- }
- break;
- }
- }
- if (i == UDF_SB_NUMPARTS(sb))
- {
- udf_debug("Partition (%d) not found in partition mapn", le16_to_cpu(p->partitionNumber));
- }
- else
- {
- udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %dn",
- le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i),
- UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i));
- }
- }
- static int
- udf_load_logicalvol(struct super_block *sb, struct buffer_head * bh, lb_addr *fileset)
- {
- struct LogicalVolDesc *lvd;
- int i, j, offset;
- Uint8 type;
- lvd = (struct LogicalVolDesc *)bh->b_data;
- UDF_SB_ALLOC_PARTMAPS(sb, le32_to_cpu(lvd->numPartitionMaps));
- for (i=0,offset=0;
- i<UDF_SB_NUMPARTS(sb) && offset<le32_to_cpu(lvd->mapTableLength);
- i++,offset+=((struct GenericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength)
- {
- type = ((struct GenericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType;
- if (type == 1)
- {
- struct GenericPartitionMap1 *gpm1 = (struct GenericPartitionMap1 *)&(lvd->partitionMaps[offset]);
- UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15;
- UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum);
- UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum);
- UDF_SB_PARTFUNC(sb,i) = 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(((Uint16 *)upm2->partIdent.identSuffix)[0]) == 0x0150)
- {
- UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15;
- UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15;
- }
- else if (le16_to_cpu(((Uint16 *)upm2->partIdent.identSuffix)[0]) == 0x0200)
- {
- UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20;
- UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20;
- }
- }
- else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE)))
- {
- Uint32 loc;
- Uint16 ident;
- struct SparingTable *st;
- struct SparablePartitionMap *spm = (struct SparablePartitionMap *)&(lvd->partitionMaps[offset]);
- UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15;
- UDF_SB_TYPESPAR(sb,i).s_packet_len = le16_to_cpu(spm->packetLength);
- for (j=0; j<spm->numSparingTables; j++)
- {
- loc = le32_to_cpu(spm->locSparingTable[j]);
- UDF_SB_TYPESPAR(sb,i).s_spar_map[j] =
- udf_read_tagged(sb, loc, loc, &ident);
- if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL)
- {
- st = (struct SparingTable *)UDF_SB_TYPESPAR(sb,i).s_spar_map[j]->b_data;
- if (ident != 0 ||
- strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING)))
- {
- udf_release_data(UDF_SB_TYPESPAR(sb,i).s_spar_map[j]);
- UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = NULL;
- }
- }
- }
- UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15;
- }
- else
- {
- udf_debug("Unknown ident: %sn", upm2->partIdent.ident);
- continue;
- }
- UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum);
- UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum);
- }
- udf_debug("Partition (%d:%d) type %d on volume %dn",
- i, UDF_SB_PARTNUM(sb,i), type, UDF_SB_PARTVSN(sb,i));
- }
- 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=%dn",
- 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, extent_ad loc)
- {
- struct buffer_head *bh = NULL;
- Uint16 ident;
- while (loc.extLength > 0 &&
- (bh = udf_read_tagged(sb, loc.extLocation,
- loc.extLocation, &ident)) &&
- ident == TID_LOGICAL_VOL_INTEGRITY_DESC)
- {
- UDF_SB_LVIDBH(sb) = bh;
-
- if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength)
- udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt));
-
- if (UDF_SB_LVIDBH(sb) != bh)
- udf_release_data(bh);
- loc.extLength -= sb->s_blocksize;
- loc.extLocation ++;
- }
- if (UDF_SB_LVIDBH(sb) != bh)
- udf_release_data(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, lb_addr *fileset)
- {
- struct buffer_head *bh = NULL;
- struct udf_vds_record vds[VDS_POS_LENGTH];
- struct GenericDesc *gd;
- struct VolDescPtr *vdp;
- int done=0;
- int i,j;
- Uint32 vdsn;
- Uint16 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 GenericDesc *)bh->b_data;
- vdsn = le32_to_cpu(gd->volDescSeqNum);
- switch (ident)
- {
- case TID_PRIMARY_VOL_DESC: /* 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 TID_VOL_DESC_PTR: /* 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 TID_IMP_USE_VOL_DESC: /* 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 TID_PARTITION_DESC: /* ISO 13346 3/10.5 */
- if (!vds[VDS_POS_PARTITION_DESC].block)
- vds[VDS_POS_PARTITION_DESC].block = block;
- break;
- case TID_LOGICAL_VOL_DESC: /* 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 TID_UNALLOC_SPACE_DESC: /* 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 TID_TERMINATING_DESC: /* 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;
- }
- udf_release_data(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)
- udf_load_logicalvol(sb, bh, fileset);
- else if (i == VDS_POS_PARTITION_DESC)
- {
- struct buffer_head *bh2 = NULL;
- udf_load_partdesc(sb, bh);
- for (j=vds[i].block+1; j<vds[VDS_POS_TERMINATING_DESC].block; j++)
- {
- bh2 = udf_read_tagged(sb, j, j, &ident);
- gd = (struct GenericDesc *)bh2->b_data;
- if (ident == TID_PARTITION_DESC)
- udf_load_partdesc(sb, bh2);
- udf_release_data(bh2);
- }
- }
- udf_release_data(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 optionn");
- return 0;
- }
- /* Check that it is NSR02 compliant */
- /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
- else if ((block = udf_vrs(sb, silent)) == -1)
- {
- udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity checkn");
- if (!UDF_SB_LASTBLOCK(sb))
- UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
- return 0;
- }
- else
- return !block;
- }
- static int
- udf_load_partition(struct super_block *sb, lb_addr *fileset)
- {
- struct AnchorVolDescPtr *anchor;
- Uint16 ident;
- struct buffer_head *bh;
- long main_s, main_e, reserve_s, reserve_e;
- int i, j;
- if (!sb)
- return 1;
- for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
- {
- if (UDF_SB_ANCHOR(sb)[i] && (bh = udf_read_tagged(sb,
- UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[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;
- udf_release_data(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 == sizeof(UDF_SB_ANCHOR(sb))/sizeof(int))
- {
- udf_debug("No Anchor block foundn");
- return 1;
- }
- else
- udf_debug("Using anchor in block %dn", UDF_SB_ANCHOR(sb)[i]);
- for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
- {
- switch UDF_SB_PARTTYPE(sb, i)
- {
- case UDF_VIRTUAL_MAP15:
- case UDF_VIRTUAL_MAP20:
- {
- lb_addr ino;
- if (!UDF_SB_LASTBLOCK(sb))
- {
- UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
- udf_find_anchor(sb);
- }
- if (!UDF_SB_LASTBLOCK(sb))
- {
- udf_debug("Unable to determine Lastblock (For Virtual Partition)n");
- return 1;
- }
- for (j=0; j<UDF_SB_NUMPARTS(sb); j++)
- {
- if (j != i &&
- UDF_SB_PARTVSN(sb,i) == UDF_SB_PARTVSN(sb,j) &&
- UDF_SB_PARTNUM(sb,i) == UDF_SB_PARTNUM(sb,j))
- {
- ino.partitionReferenceNum = j;
- ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) -
- UDF_SB_PARTROOT(sb,j);
- break;
- }
- }
- if (j == UDF_SB_NUMPARTS(sb))
- return 1;
- if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino)))
- return 1;
- if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP15)
- {
- UDF_SB_TYPEVIRT(sb,i).s_start_offset = udf_ext0_offset(UDF_SB_VAT(sb));
- UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 36) >> 2;
- }
- else if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP20)
- {
- struct buffer_head *bh = NULL;
- Uint32 pos;
- pos = udf_block_map(UDF_SB_VAT(sb), 0);
- bh = sb_bread(sb, pos);
- UDF_SB_TYPEVIRT(sb,i).s_start_offset =
- le16_to_cpu(((struct VirtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) +
- udf_ext0_offset(UDF_SB_VAT(sb));
- UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size -
- UDF_SB_TYPEVIRT(sb,i).s_start_offset) >> 2;
- udf_release_data(bh);
- }
- UDF_SB_PARTROOT(sb,i) = udf_get_pblock(sb, 0, i, 0);
- UDF_SB_PARTLEN(sb,i) = UDF_SB_PARTLEN(sb,ino.partitionReferenceNum);
- }
- }
- }
- return 0;
- }
- static void udf_open_lvid(struct super_block *sb)
- {
- if (UDF_SB_LVIDBH(sb))
- {
- int i;
- timestamp cpu_time;
- UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
- UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
- if (udf_time_to_stamp(&cpu_time, CURRENT_TIME, CURRENT_UTIME))
- UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
- UDF_SB_LVID(sb)->integrityType = INTEGRITY_TYPE_OPEN;
- UDF_SB_LVID(sb)->descTag.descCRC =
- cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
- le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
- UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
- for (i=0; i<16; i++)
- if (i != 4)
- UDF_SB_LVID(sb)->descTag.tagChecksum +=
- ((Uint8 *)&(UDF_SB_LVID(sb)->descTag))[i];
- mark_buffer_dirty(UDF_SB_LVIDBH(sb));
- }
- }
- static void udf_close_lvid(struct super_block *sb)
- {
- if (UDF_SB_LVIDBH(sb) &&
- UDF_SB_LVID(sb)->integrityType == INTEGRITY_TYPE_OPEN)
- {
- int i;
- timestamp cpu_time;
- UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
- UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
- if (udf_time_to_stamp(&cpu_time, CURRENT_TIME, CURRENT_UTIME))
- UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
- if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev))
- UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
- if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev))
- UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb));
- if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev))
- UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb));
- UDF_SB_LVID(sb)->integrityType = INTEGRITY_TYPE_CLOSE;
- UDF_SB_LVID(sb)->descTag.descCRC =
- cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
- le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
- UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
- for (i=0; i<16; i++)
- if (i != 4)
- UDF_SB_LVID(sb)->descTag.tagChecksum +=
- ((Uint8 *)&(UDF_SB_LVID(sb)->descTag))[i];
- mark_buffer_dirty(UDF_SB_LVIDBH(sb));
- }
- }
- /*
- * 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 struct super_block *
- udf_read_super(struct super_block *sb, void *options, int silent)
- {
- int i;
- struct inode *inode=NULL;
- struct udf_options uopt;
- lb_addr rootdir, fileset;
- uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
- uopt.uid = -1;
- uopt.gid = -1;
- uopt.umask = 0;
- memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info));
- #if UDFFS_RW != 1
- sb->s_flags |= MS_RDONLY;
- #endif
- 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 iocharsetn");
- goto error_out;
- }
- #ifdef CONFIG_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 mapn");
- }
- #endif
- if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
- uopt.flags |= (1 << UDF_FLAG_UTF8);
- fileset.logicalBlockNum = 0xFFFFFFFF;
- fileset.partitionReferenceNum = 0xFFFF;
- 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;
- UDF_SB(sb)->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 )
- UDF_SB_SESSION(sb) = udf_get_last_session(sb);
- else
- UDF_SB_SESSION(sb) = uopt.session;
- udf_debug("Multi-session=%dn", UDF_SB_SESSION(sb));
- UDF_SB_LASTBLOCK(sb) = uopt.lastblock;
- UDF_SB_ANCHOR(sb)[0] = UDF_SB_ANCHOR(sb)[1] = 0;
- UDF_SB_ANCHOR(sb)[2] = uopt.anchor;
- UDF_SB_ANCHOR(sb)[3] = UDF_SB_SESSION(sb) + 256;
- if (udf_check_valid(sb, uopt.novrs, silent)) /* read volume recognition sequences */
- {
- printk("UDF-fs: No VRS foundn");
- 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;
- if (udf_load_partition(sb, &fileset))
- {
- printk("UDF-fs: No partition found (1)n");
- goto error_out;
- }
- udf_debug("Lastblock=%dn", UDF_SB_LASTBLOCK(sb));
- if ( UDF_SB_LVIDBH(sb) )
- {
- Uint16 minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev);
- Uint16 minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev);
- /* Uint16 maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */
- if (minUDFReadRev > UDF_MAX_READ_VERSION)
- {
- printk("UDF-fs: minUDFReadRev=%x (max is %x)n",
- UDF_SB_LVIDIU(sb)->minUDFReadRev, UDF_MAX_READ_VERSION);
- goto error_out;
- }
- else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
- {
- sb->s_flags |= MS_RDONLY;
- }
- UDF_SB_UDFREV(sb) = 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 ( !UDF_SB_NUMPARTS(sb) )
- {
- printk("UDF-fs: No partition found (2)n");
- goto error_out;
- }
- if ( udf_find_fileset(sb, &fileset, &rootdir) )
- {
- printk("UDF-fs: No fileset foundn");
- goto error_out;
- }
- if (!silent)
- {
- timestamp ts;
- udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb), 0);
- udf_info("UDF %s-%s (%s) Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)n",
- UDFFS_VERSION, UDFFS_RW ? "rw" : "ro", UDFFS_DATE,
- UDF_SB_VOLIDENT(sb), 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("UDF-fs: Error in udf_iget, block=%d, partition=%dn",
- 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("UDF-fs: Couldn't allocate root dentryn");
- iput(inode);
- goto error_out;
- }
- sb->s_maxbytes = ~0ULL;
- return sb;
- error_out:
- if (UDF_SB_VAT(sb))
- iput(UDF_SB_VAT(sb));
- if (UDF_SB_NUMPARTS(sb))
- {
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
- iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
- iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
- {
- for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_uspace); i++)
- {
- if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i))
- udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i));
- }
- kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
- }
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
- {
- for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_fspace); i++)
- {
- if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i))
- udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i));
- }
- kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
- }
- if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15)
- {
- for (i=0; i<4; i++)
- udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
- }
- }
- #ifdef CONFIG_NLS
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
- unload_nls(UDF_SB(sb)->s_nls_map);
- #endif
- if (!(sb->s_flags & MS_RDONLY))
- udf_close_lvid(sb);
- udf_release_data(UDF_SB_LVIDBH(sb));
- UDF_SB_FREE(sb);
- return NULL;
- }
- 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);
- vsprintf(error_buf, fmt, args);
- va_end(args);
- printk (KERN_CRIT "UDF-fs error (device %s): %s: %sn",
- bdevname(sb->s_dev), function, error_buf);
- }
- void udf_warning(struct super_block *sb, const char *function,
- const char *fmt, ...)
- {
- va_list args;
- va_start (args, fmt);
- vsprintf(error_buf, fmt, args);
- va_end(args);
- printk(KERN_WARNING "UDF-fs warning (device %s): %s: %sn",
- bdevname(sb->s_dev), 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;
- if (UDF_SB_VAT(sb))
- iput(UDF_SB_VAT(sb));
- if (UDF_SB_NUMPARTS(sb))
- {
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
- iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
- iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
- {
- for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_uspace); i++)
- {
- if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i))
- udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace,i));
- }
- kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
- }
- if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
- {
- for (i=0; i<UDF_SB_BITMAP_NR_GROUPS(sb,UDF_SB_PARTITION(sb),s_fspace); i++)
- {
- if (UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i))
- udf_release_data(UDF_SB_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace,i));
- }
- kfree(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
- }
- if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15)
- {
- for (i=0; i<4; i++)
- udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
- }
- }
- #ifdef CONFIG_NLS
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
- unload_nls(UDF_SB(sb)->s_nls_map);
- #endif
- if (!(sb->s_flags & MS_RDONLY))
- udf_close_lvid(sb);
- udf_release_data(UDF_SB_LVIDBH(sb));
- UDF_SB_FREE(sb);
- }
- /*
- * 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 super_block *sb, struct statfs *buf)
- {
- buf->f_type = UDF_SUPER_MAGIC;
- buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
- buf->f_bfree = udf_count_free(sb);
- buf->f_bavail = buf->f_bfree;
- buf->f_files = (UDF_SB_LVIDBH(sb) ?
- (le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) +
- le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree;
- buf->f_ffree = buf->f_bfree;
- /* __kernel_fsid_t f_fsid */
- buf->f_namelen = UDF_NAME_LEN;
- 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;
- lb_addr loc;
- Uint32 bytes;
- Uint8 value;
- Uint8 *ptr;
- Uint16 ident;
- struct SpaceBitmapDesc *bm;
- loc.logicalBlockNum = bitmap->s_extPosition;
- loc.partitionReferenceNum = UDF_SB_PARTITION(sb);
- bh = udf_read_ptagged(sb, loc, 0, &ident);
- if (!bh)
- {
- printk(KERN_ERR "udf: udf_count_free failedn");
- return 0;
- }
- else if (ident != TID_SPACE_BITMAP_DESC)
- {
- udf_release_data(bh);
- printk(KERN_ERR "udf: udf_count_free failedn");
- return 0;
- }
- bm = (struct SpaceBitmapDesc *)bh->b_data;
- bytes = bm->numOfBytes;
- index = sizeof(struct SpaceBitmapDesc); /* offset in first block only */
- ptr = (Uint8 *)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 )
- {
- udf_release_data(bh);
- newblock = udf_get_lb_pblock(sb, loc, ++block);
- bh = udf_tread(sb, newblock);
- if (!bh)
- {
- udf_debug("read failedn");
- return accum;
- }
- index = 0;
- ptr = (Uint8 *)bh->b_data;
- }
- }
- udf_release_data(bh);
- return accum;
- }
- static unsigned int
- udf_count_free_table(struct super_block *sb, struct inode * table)
- {
- unsigned int accum = 0;
- Uint32 extoffset, elen;
- lb_addr bloc, eloc;
- Sint8 etype;
- struct buffer_head *bh = NULL;
- bloc = UDF_I_LOCATION(table);
- extoffset = sizeof(struct UnallocatedSpaceEntry);
- while ((etype = udf_next_aext(table, &bloc, &extoffset, &eloc, &elen, &bh, 1)) != -1)
- {
- accum += (elen >> table->i_sb->s_blocksize_bits);
- }
- udf_release_data(bh);
- return accum;
- }
-
- static unsigned int
- udf_count_free(struct super_block *sb)
- {
- unsigned int accum = 0;
- if (UDF_SB_LVIDBH(sb))
- {
- if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb))
- {
- accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]);
- if (accum == 0xFFFFFFFF)
- accum = 0;
- }
- }
- if (accum)
- return accum;
- if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
- {
- accum += udf_count_free_bitmap(sb,
- UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
- }
- if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
- {
- accum += udf_count_free_bitmap(sb,
- UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
- }
- if (accum)
- return accum;
- if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
- {
- accum += udf_count_free_table(sb,
- UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
- }
- if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
- {
- accum += udf_count_free_table(sb,
- UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
- }
- return accum;
- }