mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
7c0aa811ec
Signed-off-by: Sergey Isakov <isakov-sl@bk.ru>
1208 lines
30 KiB
C
1208 lines
30 KiB
C
/* udf.c - Universal Disk Format filesystem. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/err.h>
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#include <grub/file.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/disk.h>
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#include <grub/dl.h>
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#include <grub/types.h>
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#include <grub/fshelp.h>
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#include <grub/charset.h>
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#include <grub/datetime.h>
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#include <grub/udf.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#define GRUB_UDF_MAX_PDS 2
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#define GRUB_UDF_MAX_PMS 6
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#define U16 grub_le_to_cpu16
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#define U32 grub_le_to_cpu32
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#define U64 grub_le_to_cpu64
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#define GRUB_UDF_TAG_IDENT_PVD 0x0001
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#define GRUB_UDF_TAG_IDENT_AVDP 0x0002
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#define GRUB_UDF_TAG_IDENT_VDP 0x0003
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#define GRUB_UDF_TAG_IDENT_IUVD 0x0004
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#define GRUB_UDF_TAG_IDENT_PD 0x0005
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#define GRUB_UDF_TAG_IDENT_LVD 0x0006
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#define GRUB_UDF_TAG_IDENT_USD 0x0007
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#define GRUB_UDF_TAG_IDENT_TD 0x0008
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#define GRUB_UDF_TAG_IDENT_LVID 0x0009
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#define GRUB_UDF_TAG_IDENT_FSD 0x0100
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#define GRUB_UDF_TAG_IDENT_FID 0x0101
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#define GRUB_UDF_TAG_IDENT_AED 0x0102
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#define GRUB_UDF_TAG_IDENT_IE 0x0103
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#define GRUB_UDF_TAG_IDENT_TE 0x0104
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#define GRUB_UDF_TAG_IDENT_FE 0x0105
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#define GRUB_UDF_TAG_IDENT_EAHD 0x0106
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#define GRUB_UDF_TAG_IDENT_USE 0x0107
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#define GRUB_UDF_TAG_IDENT_SBD 0x0108
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#define GRUB_UDF_TAG_IDENT_PIE 0x0109
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#define GRUB_UDF_TAG_IDENT_EFE 0x010A
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#define GRUB_UDF_ICBTAG_TYPE_UNDEF 0x00
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#define GRUB_UDF_ICBTAG_TYPE_USE 0x01
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#define GRUB_UDF_ICBTAG_TYPE_PIE 0x02
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#define GRUB_UDF_ICBTAG_TYPE_IE 0x03
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#define GRUB_UDF_ICBTAG_TYPE_DIRECTORY 0x04
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#define GRUB_UDF_ICBTAG_TYPE_REGULAR 0x05
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#define GRUB_UDF_ICBTAG_TYPE_BLOCK 0x06
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#define GRUB_UDF_ICBTAG_TYPE_CHAR 0x07
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#define GRUB_UDF_ICBTAG_TYPE_EA 0x08
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#define GRUB_UDF_ICBTAG_TYPE_FIFO 0x09
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#define GRUB_UDF_ICBTAG_TYPE_SOCKET 0x0A
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#define GRUB_UDF_ICBTAG_TYPE_TE 0x0B
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#define GRUB_UDF_ICBTAG_TYPE_SYMLINK 0x0C
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#define GRUB_UDF_ICBTAG_TYPE_STREAMDIR 0x0D
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#define GRUB_UDF_ICBTAG_FLAG_AD_MASK 0x0007
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#define GRUB_UDF_ICBTAG_FLAG_AD_SHORT 0x0000
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#define GRUB_UDF_ICBTAG_FLAG_AD_LONG 0x0001
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#define GRUB_UDF_ICBTAG_FLAG_AD_EXT 0x0002
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#define GRUB_UDF_ICBTAG_FLAG_AD_IN_ICB 0x0003
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#define GRUB_UDF_EXT_NORMAL 0x00000000
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#define GRUB_UDF_EXT_NREC_ALLOC 0x40000000
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#define GRUB_UDF_EXT_NREC_NALLOC 0x80000000
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#define GRUB_UDF_EXT_MASK 0xC0000000
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#define GRUB_UDF_FID_CHAR_HIDDEN 0x01
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#define GRUB_UDF_FID_CHAR_DIRECTORY 0x02
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#define GRUB_UDF_FID_CHAR_DELETED 0x04
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#define GRUB_UDF_FID_CHAR_PARENT 0x08
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#define GRUB_UDF_FID_CHAR_METADATA 0x10
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#define GRUB_UDF_STD_IDENT_BEA01 "BEA01"
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#define GRUB_UDF_STD_IDENT_BOOT2 "BOOT2"
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#define GRUB_UDF_STD_IDENT_CD001 "CD001"
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#define GRUB_UDF_STD_IDENT_CDW02 "CDW02"
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#define GRUB_UDF_STD_IDENT_NSR02 "NSR02"
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#define GRUB_UDF_STD_IDENT_NSR03 "NSR03"
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#define GRUB_UDF_STD_IDENT_TEA01 "TEA01"
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#define GRUB_UDF_CHARSPEC_TYPE_CS0 0x00
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#define GRUB_UDF_CHARSPEC_TYPE_CS1 0x01
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#define GRUB_UDF_CHARSPEC_TYPE_CS2 0x02
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#define GRUB_UDF_CHARSPEC_TYPE_CS3 0x03
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#define GRUB_UDF_CHARSPEC_TYPE_CS4 0x04
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#define GRUB_UDF_CHARSPEC_TYPE_CS5 0x05
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#define GRUB_UDF_CHARSPEC_TYPE_CS6 0x06
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#define GRUB_UDF_CHARSPEC_TYPE_CS7 0x07
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#define GRUB_UDF_CHARSPEC_TYPE_CS8 0x08
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#define GRUB_UDF_PARTMAP_TYPE_1 1
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#define GRUB_UDF_PARTMAP_TYPE_2 2
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struct grub_udf_lb_addr
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{
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grub_uint32_t block_num;
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grub_uint16_t part_ref;
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} GRUB_PACKED;
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struct grub_udf_short_ad
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{
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grub_uint32_t length;
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grub_uint32_t position;
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} GRUB_PACKED;
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struct grub_udf_long_ad
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{
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grub_uint32_t length;
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struct grub_udf_lb_addr block;
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grub_uint8_t imp_use[6];
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} GRUB_PACKED;
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struct grub_udf_extent_ad
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{
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grub_uint32_t length;
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grub_uint32_t start;
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} GRUB_PACKED;
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struct grub_udf_charspec
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{
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grub_uint8_t charset_type;
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grub_uint8_t charset_info[63];
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} GRUB_PACKED;
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struct grub_udf_timestamp
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{
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grub_uint16_t type_and_timezone;
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grub_uint16_t year;
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grub_uint8_t month;
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grub_uint8_t day;
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grub_uint8_t hour;
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grub_uint8_t minute;
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grub_uint8_t second;
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grub_uint8_t centi_seconds;
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grub_uint8_t hundreds_of_micro_seconds;
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grub_uint8_t micro_seconds;
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} GRUB_PACKED;
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struct grub_udf_regid
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{
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grub_uint8_t flags;
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grub_uint8_t ident[23];
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grub_uint8_t ident_suffix[8];
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} GRUB_PACKED;
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struct grub_udf_tag
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{
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grub_uint16_t tag_ident;
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grub_uint16_t desc_version;
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grub_uint8_t tag_checksum;
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grub_uint8_t reserved;
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grub_uint16_t tag_serial_number;
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grub_uint16_t desc_crc;
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grub_uint16_t desc_crc_length;
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grub_uint32_t tag_location;
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} GRUB_PACKED;
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struct grub_udf_fileset
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{
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struct grub_udf_tag tag;
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struct grub_udf_timestamp datetime;
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grub_uint16_t interchange_level;
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grub_uint16_t max_interchange_level;
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grub_uint32_t charset_list;
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grub_uint32_t max_charset_list;
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grub_uint32_t fileset_num;
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grub_uint32_t fileset_desc_num;
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struct grub_udf_charspec vol_charset;
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grub_uint8_t vol_ident[128];
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struct grub_udf_charspec fileset_charset;
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grub_uint8_t fileset_ident[32];
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grub_uint8_t copyright_file_ident[32];
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grub_uint8_t abstract_file_ident[32];
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struct grub_udf_long_ad root_icb;
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struct grub_udf_regid domain_ident;
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struct grub_udf_long_ad next_ext;
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struct grub_udf_long_ad streamdir_icb;
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} GRUB_PACKED;
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struct grub_udf_icbtag
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{
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grub_uint32_t prior_recorded_num_direct_entries;
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grub_uint16_t strategy_type;
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grub_uint16_t strategy_parameter;
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grub_uint16_t num_entries;
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grub_uint8_t reserved;
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grub_uint8_t file_type;
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struct grub_udf_lb_addr parent_idb;
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grub_uint16_t flags;
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} GRUB_PACKED;
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struct grub_udf_file_ident
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{
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struct grub_udf_tag tag;
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grub_uint16_t version_num;
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grub_uint8_t characteristics;
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#define MAX_FILE_IDENT_LENGTH 256
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grub_uint8_t file_ident_length;
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struct grub_udf_long_ad icb;
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grub_uint16_t imp_use_length;
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} GRUB_PACKED;
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struct grub_udf_file_entry
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{
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struct grub_udf_tag tag;
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struct grub_udf_icbtag icbtag;
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grub_uint32_t uid;
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grub_uint32_t gid;
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grub_uint32_t permissions;
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grub_uint16_t link_count;
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grub_uint8_t record_format;
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grub_uint8_t record_display_attr;
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grub_uint32_t record_length;
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grub_uint64_t file_size;
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grub_uint64_t blocks_recorded;
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struct grub_udf_timestamp access_time;
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struct grub_udf_timestamp modification_time;
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struct grub_udf_timestamp attr_time;
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grub_uint32_t checkpoint;
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struct grub_udf_long_ad extended_attr_idb;
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struct grub_udf_regid imp_ident;
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grub_uint64_t unique_id;
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grub_uint32_t ext_attr_length;
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grub_uint32_t alloc_descs_length;
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grub_uint8_t ext_attr[0];
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} GRUB_PACKED;
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struct grub_udf_extended_file_entry
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{
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struct grub_udf_tag tag;
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struct grub_udf_icbtag icbtag;
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grub_uint32_t uid;
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grub_uint32_t gid;
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grub_uint32_t permissions;
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grub_uint16_t link_count;
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grub_uint8_t record_format;
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grub_uint8_t record_display_attr;
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grub_uint32_t record_length;
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grub_uint64_t file_size;
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grub_uint64_t object_size;
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grub_uint64_t blocks_recorded;
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struct grub_udf_timestamp access_time;
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struct grub_udf_timestamp modification_time;
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struct grub_udf_timestamp create_time;
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struct grub_udf_timestamp attr_time;
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grub_uint32_t checkpoint;
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grub_uint32_t reserved;
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struct grub_udf_long_ad extended_attr_icb;
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struct grub_udf_long_ad streamdir_icb;
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struct grub_udf_regid imp_ident;
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grub_uint64_t unique_id;
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grub_uint32_t ext_attr_length;
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grub_uint32_t alloc_descs_length;
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grub_uint8_t ext_attr[0];
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} GRUB_PACKED;
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struct grub_udf_vrs
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{
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grub_uint8_t type;
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grub_uint8_t magic[5];
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grub_uint8_t version;
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} GRUB_PACKED;
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struct grub_udf_avdp
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{
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struct grub_udf_tag tag;
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struct grub_udf_extent_ad vds;
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} GRUB_PACKED;
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struct grub_udf_pd
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{
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struct grub_udf_tag tag;
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grub_uint32_t seq_num;
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grub_uint16_t flags;
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grub_uint16_t part_num;
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struct grub_udf_regid contents;
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grub_uint8_t contents_use[128];
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grub_uint32_t access_type;
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grub_uint32_t start;
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grub_uint32_t length;
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} GRUB_PACKED;
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struct grub_udf_partmap
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{
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grub_uint8_t type;
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grub_uint8_t length;
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union
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{
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struct
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{
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grub_uint16_t seq_num;
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grub_uint16_t part_num;
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} type1;
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struct
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{
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grub_uint8_t ident[62];
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} type2;
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};
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} GRUB_PACKED;
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struct grub_udf_lvd
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{
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struct grub_udf_tag tag;
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grub_uint32_t seq_num;
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struct grub_udf_charspec charset;
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grub_uint8_t ident[128];
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grub_uint32_t bsize;
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struct grub_udf_regid domain_ident;
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struct grub_udf_long_ad root_fileset;
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grub_uint32_t map_table_length;
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grub_uint32_t num_part_maps;
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struct grub_udf_regid imp_ident;
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grub_uint8_t imp_use[128];
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struct grub_udf_extent_ad integrity_seq_ext;
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grub_uint8_t part_maps[1608];
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} GRUB_PACKED;
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struct grub_udf_aed
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{
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struct grub_udf_tag tag;
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grub_uint32_t prev_ae;
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grub_uint32_t ae_len;
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} GRUB_PACKED;
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struct grub_udf_data
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{
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grub_disk_t disk;
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struct grub_udf_lvd lvd;
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struct grub_udf_pd pds[GRUB_UDF_MAX_PDS];
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struct grub_udf_partmap *pms[GRUB_UDF_MAX_PMS];
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struct grub_udf_long_ad root_icb;
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int npd, npm, lbshift;
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};
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struct grub_fshelp_node
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{
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struct grub_udf_data *data;
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int part_ref;
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union
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{
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struct grub_udf_file_entry fe;
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struct grub_udf_extended_file_entry efe;
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char raw[0];
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} block;
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};
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static inline grub_size_t
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get_fshelp_size (struct grub_udf_data *data)
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{
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struct grub_fshelp_node *x = NULL;
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return sizeof (*x)
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+ (1 << (GRUB_DISK_SECTOR_BITS
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+ data->lbshift)) - sizeof (x->block);
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}
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static grub_dl_t my_mod;
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static grub_uint32_t
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grub_udf_get_block (struct grub_udf_data *data,
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grub_uint16_t part_ref, grub_uint32_t block)
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{
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part_ref = U16 (part_ref);
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if (part_ref >= data->npm)
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{
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grub_error (GRUB_ERR_BAD_FS, "invalid part ref");
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return 0;
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}
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return (U32 (data->pds[data->pms[part_ref]->type1.part_num].start)
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+ U32 (block));
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}
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static grub_err_t
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grub_udf_read_icb (struct grub_udf_data *data,
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struct grub_udf_long_ad *icb,
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struct grub_fshelp_node *node)
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{
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grub_uint32_t block;
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block = grub_udf_get_block (data,
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icb->block.part_ref,
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icb->block.block_num);
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if (grub_errno)
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return grub_errno;
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if (grub_disk_read (data->disk, block << data->lbshift, 0,
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1 << (GRUB_DISK_SECTOR_BITS
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+ data->lbshift),
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&node->block))
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return grub_errno;
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if ((U16 (node->block.fe.tag.tag_ident) != GRUB_UDF_TAG_IDENT_FE) &&
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(U16 (node->block.fe.tag.tag_ident) != GRUB_UDF_TAG_IDENT_EFE))
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return grub_error (GRUB_ERR_BAD_FS, "invalid fe/efe descriptor");
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node->part_ref = icb->block.part_ref;
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node->data = data;
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return 0;
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}
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static grub_disk_addr_t
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grub_udf_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock)
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{
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char *buf = NULL;
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char *ptr;
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grub_ssize_t len;
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grub_disk_addr_t filebytes;
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switch (U16 (node->block.fe.tag.tag_ident))
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{
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case GRUB_UDF_TAG_IDENT_FE:
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ptr = (char *) &node->block.fe.ext_attr[0] + U32 (node->block.fe.ext_attr_length);
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len = U32 (node->block.fe.alloc_descs_length);
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break;
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case GRUB_UDF_TAG_IDENT_EFE:
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ptr = (char *) &node->block.efe.ext_attr[0] + U32 (node->block.efe.ext_attr_length);
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len = U32 (node->block.efe.alloc_descs_length);
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break;
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default:
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grub_error (GRUB_ERR_BAD_FS, "invalid file entry");
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return 0;
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}
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if ((U16 (node->block.fe.icbtag.flags) & GRUB_UDF_ICBTAG_FLAG_AD_MASK)
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== GRUB_UDF_ICBTAG_FLAG_AD_SHORT)
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{
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struct grub_udf_short_ad *ad = (struct grub_udf_short_ad *) ptr;
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filebytes = fileblock * U32 (node->data->lvd.bsize);
|
|
while (len >= (grub_ssize_t) sizeof (struct grub_udf_short_ad))
|
|
{
|
|
grub_uint32_t adlen = U32 (ad->length) & 0x3fffffff;
|
|
grub_uint32_t adtype = U32 (ad->length) >> 30;
|
|
if (adtype == 3)
|
|
{
|
|
struct grub_udf_aed *extension;
|
|
grub_disk_addr_t sec = grub_udf_get_block(node->data,
|
|
node->part_ref,
|
|
ad->position);
|
|
if (!buf)
|
|
{
|
|
buf = grub_malloc (U32 (node->data->lvd.bsize));
|
|
if (!buf)
|
|
return 0;
|
|
}
|
|
if (grub_disk_read (node->data->disk, sec << node->data->lbshift,
|
|
0, adlen, buf))
|
|
goto fail;
|
|
|
|
extension = (struct grub_udf_aed *) buf;
|
|
if (U16 (extension->tag.tag_ident) != GRUB_UDF_TAG_IDENT_AED)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "invalid aed tag");
|
|
goto fail;
|
|
}
|
|
|
|
len = U32 (extension->ae_len);
|
|
ad = (struct grub_udf_short_ad *)
|
|
(buf + sizeof (struct grub_udf_aed));
|
|
continue;
|
|
}
|
|
|
|
if (filebytes < adlen)
|
|
{
|
|
grub_uint32_t ad_pos = ad->position;
|
|
grub_free (buf);
|
|
return ((U32 (ad_pos) & GRUB_UDF_EXT_MASK) ? 0 :
|
|
(grub_udf_get_block (node->data, node->part_ref, ad_pos)
|
|
+ (filebytes >> (GRUB_DISK_SECTOR_BITS
|
|
+ node->data->lbshift))));
|
|
}
|
|
|
|
filebytes -= adlen;
|
|
ad++;
|
|
len -= sizeof (struct grub_udf_short_ad);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
struct grub_udf_long_ad *ad = (struct grub_udf_long_ad *) ptr;
|
|
|
|
filebytes = fileblock * U32 (node->data->lvd.bsize);
|
|
while (len >= (grub_ssize_t) sizeof (struct grub_udf_long_ad))
|
|
{
|
|
grub_uint32_t adlen = U32 (ad->length) & 0x3fffffff;
|
|
grub_uint32_t adtype = U32 (ad->length) >> 30;
|
|
if (adtype == 3)
|
|
{
|
|
struct grub_udf_aed *extension;
|
|
grub_disk_addr_t sec = grub_udf_get_block(node->data,
|
|
ad->block.part_ref,
|
|
ad->block.block_num);
|
|
if (!buf)
|
|
{
|
|
buf = grub_malloc (U32 (node->data->lvd.bsize));
|
|
if (!buf)
|
|
return 0;
|
|
}
|
|
if (grub_disk_read (node->data->disk, sec << node->data->lbshift,
|
|
0, adlen, buf))
|
|
goto fail;
|
|
|
|
extension = (struct grub_udf_aed *) buf;
|
|
if (U16 (extension->tag.tag_ident) != GRUB_UDF_TAG_IDENT_AED)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "invalid aed tag");
|
|
goto fail;
|
|
}
|
|
|
|
len = U32 (extension->ae_len);
|
|
ad = (struct grub_udf_long_ad *)
|
|
(buf + sizeof (struct grub_udf_aed));
|
|
continue;
|
|
}
|
|
|
|
if (filebytes < adlen)
|
|
{
|
|
grub_uint32_t ad_block_num = ad->block.block_num;
|
|
grub_uint32_t ad_part_ref = ad->block.part_ref;
|
|
grub_free (buf);
|
|
return ((U32 (ad_block_num) & GRUB_UDF_EXT_MASK) ? 0 :
|
|
(grub_udf_get_block (node->data, ad_part_ref,
|
|
ad_block_num)
|
|
+ (filebytes >> (GRUB_DISK_SECTOR_BITS
|
|
+ node->data->lbshift))));
|
|
}
|
|
|
|
filebytes -= adlen;
|
|
ad++;
|
|
len -= sizeof (struct grub_udf_long_ad);
|
|
}
|
|
}
|
|
|
|
fail:
|
|
grub_free (buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static grub_ssize_t
|
|
grub_udf_read_file (grub_fshelp_node_t node,
|
|
grub_disk_read_hook_t read_hook, void *read_hook_data,
|
|
grub_off_t pos, grub_size_t len, char *buf)
|
|
{
|
|
switch (U16 (node->block.fe.icbtag.flags) & GRUB_UDF_ICBTAG_FLAG_AD_MASK)
|
|
{
|
|
case GRUB_UDF_ICBTAG_FLAG_AD_IN_ICB:
|
|
{
|
|
char *ptr;
|
|
|
|
ptr = ((U16 (node->block.fe.tag.tag_ident) == GRUB_UDF_TAG_IDENT_FE) ?
|
|
((char *) &node->block.fe.ext_attr[0]
|
|
+ U32 (node->block.fe.ext_attr_length)) :
|
|
((char *) &node->block.efe.ext_attr[0]
|
|
+ U32 (node->block.efe.ext_attr_length)));
|
|
|
|
grub_memcpy (buf, ptr + pos, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
case GRUB_UDF_ICBTAG_FLAG_AD_EXT:
|
|
grub_error (GRUB_ERR_BAD_FS, "invalid extent type");
|
|
return 0;
|
|
}
|
|
|
|
return grub_fshelp_read_file (node->data->disk, node,
|
|
read_hook, read_hook_data,
|
|
pos, len, buf, grub_udf_read_block,
|
|
U64 (node->block.fe.file_size),
|
|
node->data->lbshift, 0);
|
|
}
|
|
|
|
static unsigned sblocklist[] = { 256, 512, 0 };
|
|
|
|
static struct grub_udf_data *
|
|
grub_udf_mount (grub_disk_t disk)
|
|
{
|
|
struct grub_udf_data *data = 0;
|
|
struct grub_udf_fileset root_fs;
|
|
unsigned *sblklist;
|
|
grub_uint32_t block, vblock;
|
|
int i, lbshift;
|
|
|
|
data = grub_malloc (sizeof (struct grub_udf_data));
|
|
if (!data)
|
|
return 0;
|
|
|
|
data->disk = disk;
|
|
|
|
/* Search for Anchor Volume Descriptor Pointer (AVDP)
|
|
* and determine logical block size. */
|
|
block = 0;
|
|
for (lbshift = 0; lbshift < 4; lbshift++) {
|
|
for (sblklist = sblocklist; *sblklist; sblklist++) {
|
|
struct grub_udf_avdp avdp;
|
|
|
|
if (grub_disk_read (disk, *sblklist << lbshift, 0,
|
|
sizeof (struct grub_udf_avdp), &avdp)) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
|
|
if (U16 (avdp.tag.tag_ident) == GRUB_UDF_TAG_IDENT_AVDP &&
|
|
U32 (avdp.tag.tag_location) == *sblklist) {
|
|
block = U32 (avdp.vds.start);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (block)
|
|
break;
|
|
}
|
|
|
|
if (!block) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
data->lbshift = lbshift;
|
|
|
|
/* Search for Volume Recognition Sequence (VRS). */
|
|
for (vblock = (32767 >> (lbshift + GRUB_DISK_SECTOR_BITS)) + 1;;
|
|
vblock += (2047 >> (lbshift + GRUB_DISK_SECTOR_BITS)) + 1) {
|
|
struct grub_udf_vrs vrs;
|
|
|
|
if (grub_disk_read (disk, vblock << lbshift, 0,
|
|
sizeof (struct grub_udf_vrs), &vrs)) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
|
|
if ((!grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_NSR03, 5)) ||
|
|
(!grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_NSR02, 5)))
|
|
break;
|
|
|
|
if ((grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_BEA01, 5)) &&
|
|
(grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_BOOT2, 5)) &&
|
|
(grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_CD001, 5)) &&
|
|
(grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_CDW02, 5)) &&
|
|
(grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_TEA01, 5))) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
data->npd = data->npm = 0;
|
|
/* Locate Partition Descriptor (PD) and Logical Volume Descriptor (LVD). */
|
|
while (1) {
|
|
struct grub_udf_tag tag;
|
|
|
|
if (grub_disk_read (disk, block << lbshift, 0,
|
|
sizeof (struct grub_udf_tag), &tag)) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
|
|
tag.tag_ident = U16 (tag.tag_ident);
|
|
if (tag.tag_ident == GRUB_UDF_TAG_IDENT_PD) {
|
|
if (data->npd >= GRUB_UDF_MAX_PDS) {
|
|
grub_error (GRUB_ERR_BAD_FS, "too many PDs");
|
|
goto fail;
|
|
}
|
|
|
|
if (grub_disk_read (disk, block << lbshift, 0,
|
|
sizeof (struct grub_udf_pd),
|
|
&data->pds[data->npd])) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
|
|
data->npd++;
|
|
}
|
|
else if (tag.tag_ident == GRUB_UDF_TAG_IDENT_LVD) {
|
|
int k;
|
|
|
|
struct grub_udf_partmap *ppm;
|
|
|
|
if (grub_disk_read (disk, block << lbshift, 0,
|
|
sizeof (struct grub_udf_lvd),
|
|
&data->lvd)) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
|
|
if (data->npm + U32 (data->lvd.num_part_maps) > GRUB_UDF_MAX_PMS) {
|
|
grub_error (GRUB_ERR_BAD_FS, "too many partition maps");
|
|
goto fail;
|
|
}
|
|
|
|
ppm = (struct grub_udf_partmap *) &data->lvd.part_maps;
|
|
for (k = U32 (data->lvd.num_part_maps); k > 0; k--) {
|
|
if (ppm->type != GRUB_UDF_PARTMAP_TYPE_1) {
|
|
grub_error (GRUB_ERR_BAD_FS, "partmap type not supported");
|
|
goto fail;
|
|
}
|
|
|
|
data->pms[data->npm++] = ppm;
|
|
ppm = (struct grub_udf_partmap *) ((char *) ppm +
|
|
U32 (ppm->length));
|
|
}
|
|
}
|
|
else if (tag.tag_ident > GRUB_UDF_TAG_IDENT_TD) {
|
|
grub_error (GRUB_ERR_BAD_FS, "invalid tag ident");
|
|
goto fail;
|
|
}
|
|
else if (tag.tag_ident == GRUB_UDF_TAG_IDENT_TD)
|
|
break;
|
|
|
|
block++;
|
|
}
|
|
|
|
for (i = 0; i < data->npm; i++) {
|
|
int j;
|
|
|
|
for (j = 0; j < data->npd; j++)
|
|
if (data->pms[i]->type1.part_num == data->pds[j].part_num) {
|
|
data->pms[i]->type1.part_num = j;
|
|
break;
|
|
}
|
|
|
|
if (j == data->npd) {
|
|
grub_error (GRUB_ERR_BAD_FS, "can\'t find PD");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
block = grub_udf_get_block (data,
|
|
data->lvd.root_fileset.block.part_ref,
|
|
data->lvd.root_fileset.block.block_num);
|
|
|
|
if (grub_errno)
|
|
goto fail;
|
|
|
|
if (grub_disk_read (disk, block << lbshift, 0,
|
|
sizeof (struct grub_udf_fileset), &root_fs)) {
|
|
grub_error (GRUB_ERR_BAD_FS, "not an UDF filesystem");
|
|
goto fail;
|
|
}
|
|
|
|
if (U16 (root_fs.tag.tag_ident) != GRUB_UDF_TAG_IDENT_FSD) {
|
|
grub_error (GRUB_ERR_BAD_FS, "invalid fileset descriptor");
|
|
goto fail;
|
|
}
|
|
|
|
data->root_icb = root_fs.root_icb;
|
|
|
|
return data;
|
|
|
|
fail:
|
|
grub_free (data);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef GRUB_UTIL
|
|
grub_disk_addr_t
|
|
grub_udf_get_cluster_sector (grub_disk_t disk, grub_uint64_t *sec_per_lcn)
|
|
{
|
|
grub_disk_addr_t ret;
|
|
static struct grub_udf_data *data;
|
|
|
|
data = grub_udf_mount (disk);
|
|
if (!data)
|
|
return 0;
|
|
|
|
ret = U32 (data->pds[data->pms[0]->type1.part_num].start);
|
|
*sec_per_lcn = 1ULL << data->lbshift;
|
|
grub_free (data);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static char *
|
|
read_string (const grub_uint8_t *raw, grub_size_t sz, char *outbuf)
|
|
{
|
|
grub_uint16_t *utf16 = NULL;
|
|
grub_size_t utf16len = 0;
|
|
|
|
if (sz == 0)
|
|
return NULL;
|
|
|
|
if (raw[0] != 8 && raw[0] != 16)
|
|
return NULL;
|
|
|
|
if (raw[0] == 8)
|
|
{
|
|
unsigned i;
|
|
utf16len = sz - 1;
|
|
utf16 = grub_malloc (utf16len * sizeof (utf16[0]));
|
|
if (!utf16)
|
|
return NULL;
|
|
for (i = 0; i < utf16len; i++)
|
|
utf16[i] = raw[i + 1];
|
|
}
|
|
if (raw[0] == 16)
|
|
{
|
|
unsigned i;
|
|
utf16len = (sz - 1) / 2;
|
|
utf16 = grub_malloc (utf16len * sizeof (utf16[0]));
|
|
if (!utf16)
|
|
return NULL;
|
|
for (i = 0; i < utf16len; i++)
|
|
utf16[i] = (raw[2 * i + 1] << 8) | raw[2*i + 2];
|
|
}
|
|
if (!outbuf)
|
|
outbuf = grub_malloc (utf16len * GRUB_MAX_UTF8_PER_UTF16 + 1);
|
|
if (outbuf)
|
|
*grub_utf16_to_utf8 ((grub_uint8_t *) outbuf, utf16, utf16len) = '\0';
|
|
grub_free (utf16);
|
|
return outbuf;
|
|
}
|
|
|
|
static int
|
|
grub_udf_iterate_dir (grub_fshelp_node_t dir,
|
|
grub_fshelp_iterate_dir_hook_t hook, void *hook_data)
|
|
{
|
|
grub_fshelp_node_t child;
|
|
struct grub_udf_file_ident dirent;
|
|
grub_off_t offset = 0;
|
|
|
|
child = grub_malloc (get_fshelp_size (dir->data));
|
|
if (!child)
|
|
return 0;
|
|
|
|
/* The current directory is not stored. */
|
|
grub_memcpy (child, dir, get_fshelp_size (dir->data));
|
|
|
|
if (hook (".", GRUB_FSHELP_DIR, child, hook_data))
|
|
return 1;
|
|
|
|
while (offset < U64 (dir->block.fe.file_size))
|
|
{
|
|
if (grub_udf_read_file (dir, 0, 0, offset, sizeof (dirent),
|
|
(char *) &dirent) != sizeof (dirent))
|
|
return 0;
|
|
|
|
if (U16 (dirent.tag.tag_ident) != GRUB_UDF_TAG_IDENT_FID)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "invalid fid tag");
|
|
return 0;
|
|
}
|
|
|
|
offset += sizeof (dirent) + U16 (dirent.imp_use_length);
|
|
if (!(dirent.characteristics & GRUB_UDF_FID_CHAR_DELETED))
|
|
{
|
|
child = grub_malloc (get_fshelp_size (dir->data));
|
|
if (!child)
|
|
return 0;
|
|
|
|
if (grub_udf_read_icb (dir->data, &dirent.icb, child))
|
|
return 0;
|
|
|
|
if (dirent.characteristics & GRUB_UDF_FID_CHAR_PARENT)
|
|
{
|
|
/* This is the parent directory. */
|
|
if (hook ("..", GRUB_FSHELP_DIR, child, hook_data))
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
enum grub_fshelp_filetype type;
|
|
char *filename;
|
|
grub_uint8_t raw[MAX_FILE_IDENT_LENGTH];
|
|
|
|
type = ((dirent.characteristics & GRUB_UDF_FID_CHAR_DIRECTORY) ?
|
|
(GRUB_FSHELP_DIR) : (GRUB_FSHELP_REG));
|
|
if (child->block.fe.icbtag.file_type == GRUB_UDF_ICBTAG_TYPE_SYMLINK)
|
|
type = GRUB_FSHELP_SYMLINK;
|
|
|
|
if ((grub_udf_read_file (dir, 0, 0, offset,
|
|
dirent.file_ident_length,
|
|
(char *) raw))
|
|
!= dirent.file_ident_length)
|
|
return 0;
|
|
|
|
filename = read_string (raw, dirent.file_ident_length, 0);
|
|
if (!filename)
|
|
grub_print_error ();
|
|
|
|
if (filename && hook (filename, type, child, hook_data))
|
|
{
|
|
grub_free (filename);
|
|
return 1;
|
|
}
|
|
grub_free (filename);
|
|
}
|
|
}
|
|
|
|
/* Align to dword boundary. */
|
|
offset = (offset + dirent.file_ident_length + 3) & (~3);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static char *
|
|
grub_udf_read_symlink (grub_fshelp_node_t node)
|
|
{
|
|
grub_size_t sz = U64 (node->block.fe.file_size);
|
|
grub_uint8_t *raw;
|
|
const grub_uint8_t *ptr;
|
|
char *out, *optr;
|
|
|
|
if (sz < 4)
|
|
return NULL;
|
|
raw = grub_malloc (sz);
|
|
if (!raw)
|
|
return NULL;
|
|
if (grub_udf_read_file (node, NULL, NULL, 0, sz, (char *) raw) < 0)
|
|
{
|
|
grub_free (raw);
|
|
return NULL;
|
|
}
|
|
|
|
out = grub_malloc (sz * 2 + 1);
|
|
if (!out)
|
|
{
|
|
grub_free (raw);
|
|
return NULL;
|
|
}
|
|
|
|
optr = out;
|
|
|
|
for (ptr = raw; ptr < raw + sz; )
|
|
{
|
|
grub_size_t s;
|
|
if ((grub_size_t) (ptr - raw + 4) > sz)
|
|
goto fail;
|
|
if (!(ptr[2] == 0 && ptr[3] == 0))
|
|
goto fail;
|
|
s = 4 + ptr[1];
|
|
if ((grub_size_t) (ptr - raw + s) > sz)
|
|
goto fail;
|
|
switch (*ptr)
|
|
{
|
|
case 1:
|
|
if (ptr[1])
|
|
goto fail;
|
|
case 2:
|
|
/* in 4 bytes. out: 1 byte. */
|
|
optr = out;
|
|
*optr++ = '/';
|
|
break;
|
|
case 3:
|
|
/* in 4 bytes. out: 3 bytes. */
|
|
if (optr != out)
|
|
*optr++ = '/';
|
|
*optr++ = '.';
|
|
*optr++ = '.';
|
|
break;
|
|
case 4:
|
|
/* in 4 bytes. out: 2 bytes. */
|
|
if (optr != out)
|
|
*optr++ = '/';
|
|
*optr++ = '.';
|
|
break;
|
|
case 5:
|
|
/* in 4 + n bytes. out, at most: 1 + 2 * n bytes. */
|
|
if (optr != out)
|
|
*optr++ = '/';
|
|
if (!read_string (ptr + 4, s - 4, optr))
|
|
goto fail;
|
|
optr += grub_strlen (optr);
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
ptr += s;
|
|
}
|
|
*optr = 0;
|
|
grub_free (raw);
|
|
return out;
|
|
|
|
fail:
|
|
grub_free (raw);
|
|
grub_free (out);
|
|
grub_error (GRUB_ERR_BAD_FS, "invalid symlink");
|
|
return NULL;
|
|
}
|
|
|
|
/* Context for grub_udf_dir. */
|
|
struct grub_udf_dir_ctx
|
|
{
|
|
grub_fs_dir_hook_t hook;
|
|
void *hook_data;
|
|
};
|
|
|
|
/* Helper for grub_udf_dir. */
|
|
static int
|
|
grub_udf_dir_iter (const char *filename, enum grub_fshelp_filetype filetype,
|
|
grub_fshelp_node_t node, void *data)
|
|
{
|
|
struct grub_udf_dir_ctx *ctx = data;
|
|
struct grub_dirhook_info info;
|
|
const struct grub_udf_timestamp *tstamp = NULL;
|
|
|
|
grub_memset (&info, 0, sizeof (info));
|
|
info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);
|
|
if (U16 (node->block.fe.tag.tag_ident) == GRUB_UDF_TAG_IDENT_FE)
|
|
tstamp = &node->block.fe.modification_time;
|
|
else if (U16 (node->block.fe.tag.tag_ident) == GRUB_UDF_TAG_IDENT_EFE)
|
|
tstamp = &node->block.efe.modification_time;
|
|
|
|
if (tstamp && (U16 (tstamp->type_and_timezone) & 0xf000) == 0x1000)
|
|
{
|
|
grub_int16_t tz;
|
|
struct grub_datetime datetime;
|
|
|
|
datetime.year = U16 (tstamp->year);
|
|
datetime.month = tstamp->month;
|
|
datetime.day = tstamp->day;
|
|
datetime.hour = tstamp->hour;
|
|
datetime.minute = tstamp->minute;
|
|
datetime.second = tstamp->second;
|
|
|
|
tz = U16 (tstamp->type_and_timezone) & 0xfff;
|
|
if (tz & 0x800)
|
|
tz |= 0xf000;
|
|
if (tz == -2047)
|
|
tz = 0;
|
|
|
|
info.mtimeset = !!grub_datetime2unixtime (&datetime, &info.mtime);
|
|
|
|
info.mtime -= 60 * tz;
|
|
}
|
|
grub_free (node);
|
|
return ctx->hook (filename, &info, ctx->hook_data);
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_udf_dir (grub_device_t device, const char *path,
|
|
grub_fs_dir_hook_t hook, void *hook_data)
|
|
{
|
|
struct grub_udf_dir_ctx ctx = { hook, hook_data };
|
|
struct grub_udf_data *data = 0;
|
|
struct grub_fshelp_node *rootnode = 0;
|
|
struct grub_fshelp_node *foundnode = 0;
|
|
|
|
grub_dl_ref (my_mod);
|
|
|
|
data = grub_udf_mount (device->disk);
|
|
if (!data)
|
|
goto fail;
|
|
|
|
rootnode = grub_malloc (get_fshelp_size (data));
|
|
if (!rootnode)
|
|
goto fail;
|
|
|
|
if (grub_udf_read_icb (data, &data->root_icb, rootnode))
|
|
goto fail;
|
|
|
|
if (grub_fshelp_find_file (path, rootnode,
|
|
&foundnode,
|
|
grub_udf_iterate_dir, grub_udf_read_symlink,
|
|
GRUB_FSHELP_DIR))
|
|
goto fail;
|
|
|
|
grub_udf_iterate_dir (foundnode, grub_udf_dir_iter, &ctx);
|
|
|
|
if (foundnode != rootnode)
|
|
grub_free (foundnode);
|
|
|
|
fail:
|
|
grub_free (rootnode);
|
|
|
|
grub_free (data);
|
|
|
|
grub_dl_unref (my_mod);
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_udf_open (struct grub_file *file, const char *name)
|
|
{
|
|
struct grub_udf_data *data;
|
|
struct grub_fshelp_node *rootnode = 0;
|
|
struct grub_fshelp_node *foundnode;
|
|
|
|
grub_dl_ref (my_mod);
|
|
|
|
data = grub_udf_mount (file->device->disk);
|
|
if (!data)
|
|
goto fail;
|
|
|
|
rootnode = grub_malloc (get_fshelp_size (data));
|
|
if (!rootnode)
|
|
goto fail;
|
|
|
|
if (grub_udf_read_icb (data, &data->root_icb, rootnode))
|
|
goto fail;
|
|
|
|
if (grub_fshelp_find_file (name, rootnode,
|
|
&foundnode,
|
|
grub_udf_iterate_dir, grub_udf_read_symlink,
|
|
GRUB_FSHELP_REG))
|
|
goto fail;
|
|
|
|
file->data = foundnode;
|
|
file->offset = 0;
|
|
file->size = U64 (foundnode->block.fe.file_size);
|
|
|
|
grub_free (rootnode);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
grub_dl_unref (my_mod);
|
|
|
|
grub_free (data);
|
|
grub_free (rootnode);
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_ssize_t
|
|
grub_udf_read (grub_file_t file, char *buf, grub_size_t len)
|
|
{
|
|
struct grub_fshelp_node *node = (struct grub_fshelp_node *) file->data;
|
|
|
|
return grub_udf_read_file (node, file->read_hook, file->read_hook_data,
|
|
file->offset, len, buf);
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_udf_close (grub_file_t file)
|
|
{
|
|
if (file->data)
|
|
{
|
|
struct grub_fshelp_node *node = (struct grub_fshelp_node *) file->data;
|
|
|
|
grub_free (node->data);
|
|
grub_free (node);
|
|
}
|
|
|
|
grub_dl_unref (my_mod);
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_udf_label (grub_device_t device, char **label)
|
|
{
|
|
struct grub_udf_data *data;
|
|
data = grub_udf_mount (device->disk);
|
|
|
|
if (data)
|
|
{
|
|
*label = read_string (data->lvd.ident, sizeof (data->lvd.ident), 0);
|
|
grub_free (data);
|
|
}
|
|
else
|
|
*label = 0;
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static struct grub_fs grub_udf_fs = {
|
|
.name = "udf",
|
|
.dir = grub_udf_dir,
|
|
.open = grub_udf_open,
|
|
.read = grub_udf_read,
|
|
.close = grub_udf_close,
|
|
.label = grub_udf_label,
|
|
#ifdef GRUB_UTIL
|
|
.reserved_first_sector = 1,
|
|
.blocklist_install = 1,
|
|
#endif
|
|
.next = 0
|
|
};
|
|
|
|
GRUB_MOD_INIT (udf)
|
|
{
|
|
grub_fs_register (&grub_udf_fs);
|
|
my_mod = mod;
|
|
}
|
|
|
|
GRUB_MOD_FINI (udf)
|
|
{
|
|
grub_fs_unregister (&grub_udf_fs);
|
|
}
|