524a1e6a40
Clean up the code to support 64-bit addressing in disks and files. This change is not enough for filesystems yet. * util/i386/pc/grub-setup.c (struct boot_blocklist): Change the type of "start" to grub_uint64_t. (setup): Change the types of KERNEL_SECTOR and FIRST_SECTOR to grub_disk_addr_t * and grub_disk_addr_t. Fix the format string in save_first_sector and save_blocklists. Use grub_le_to_cpu64 to convert addresses. * util/i386/pc/biosdisk.c (open_device): Change the type of SECTOR to grub_disk_addr_t. * partmap/gpt.c (gpt_partition_map_iterate): Fix the format string. * partmap/pc.c (pc_partition_map_iterate): Likewise. * partmap/amiga.c (amiga_partition_map_iterate): Cast RDSK.MAGIC to char *. * normal/script.c (grub_script_parse): Remove unused MEMFREE. * normal/parser.y (YYLTYPE_IS_TRIVIAL): New macro. * normal/lexer.c (grub_script_yyerror): Specify unused to LEX. * loader/i386/pc/multiboot.c (grub_multiboot_load_elf64): Cast -1 to grub_off_t, to detect an error from grub_file_seek. (grub_multiboot_load_elf32): Likewise. * kern/misc.c (grub_strtoul): Use grub_strtoull. Return the maximum unsigned long value when an overflow is detected. (grub_strtoull): New function. (grub_divmod64): Likewise. (grub_lltoa): use grub_divmod64. * kern/fs.c (struct grub_fs_block): Change the type of "offset" to grub_disk_addr_t. (grub_fs_blocklist_open): Increase P if P is not NULL to advance the pointer to next character. Use grub_strtoull instead of grub_strtoul. (grub_fs_blocklist_read): Change the types of SECTOR, OFFSET and SIZE to grub_disk_addr_t, grub_off_t and grub_size_t, respectively. * kern/file.c (grub_file_read): Prevent an oveflow of LEN, as the return value is signed. (grub_file_seek): Change the type of OLD to grub_off_t. Do not test if OFFSET is less than zero, as OFFSET is unsigned now. * kern/disk.c (struct grub_disk_cache): Change the type of "sector" to grub_disk_addr_t. (grub_disk_cache_get_index): Change the type of SECTOR to grub_disk_addr_t. Calculate the hash with SECTOR casted to unsigned after shifting. (grub_disk_cache_invalidate): Change the type of SECTOR to grub_disk_addr_t. (grub_disk_cache_unlock): Likewise. (grub_disk_cache_store): Likewise. (grub_disk_check_range): Change the types of SECTOR, OFFSET, SIZE, START and LEN to grub_disk_addr_t *, grub_off_t *, grub_size_t, grub_disk_addr_t and grub_uint64_t, respectively. (grub_disk_read): Use an unsigned variable REAL_OFFSET for the body, as the value of OFFSET is tweaked by grub_disk_check_range. Change the types of START_SECTOR, LEN and POS to grub_disk_addr_t, grub_size_t and grub_size_t, respectively. (grub_disk_write): Use an unsigned variable REAL_OFFSET for the body, as the value of OFFSET is tweaked by grub_disk_check_range. Change the types of LEN and N to grub_size_t. * io/gzio.c (struct grub_gzio): Change the types of "data_offset" and "saved_offset" to grub_off_t. (test_header): Cast BUF to char *. (get_byte): Cast GZIO->DATA_OFFSET to grub_off_t. Cast GZIO->INBUF to char *. (grub_gzio_read): Change the types of OFFSET and SIZE to grub_off_t and grub_size_t, respectively. * include/grub/i386/pc/boot.h (GRUB_BOOT_MACHINE_FORCE_LBA): Removed. (GRUB_BOOT_MACHINE_BOOT_DRIVE): Changed to 0x4c. (GRUB_BOOT_MACHINE_KERNEL_ADDRESS): Changed to 0x40. (GRUB_BOOT_MACHINE_KERNEL_SEGMENT): Changed to 0x42. (GRUB_BOOT_MACHINE_DRIVE_CHECK): Changed to 0x4e. (GRUB_BOOT_MACHINE_LIST_SIZE): Increased to 12. * include/grub/types.h (grub_off_t): Unconditionally set to grub_uint64_t. (grub_disk_addr_t): Changed to grub_uint64_t. * include/grub/partition.h (struct grub_partition): Change the types of "start", "len" and "offset" to grub_disk_addr_t, grub_uint64_t and grub_disk_addr_t, respectively. (grub_partition_get_start): Return grub_disk_addr_t. (grub_partition_get_len): Return grub_uint64_t. * include/grub/misc.h (grub_strtoull): New prototype. (grub_divmod64): Likewise. * include/grub/fshelp.h (grub_fshelp_read_file): Change the types of SECTOR, LEN and FILESIZE to grub_disk_addr_t, grub_size_t and grub_off_t, respectively. All callers and references changed. * include/grub/fs.h (struct grub_fs): Change the type of LEN to grub_size_t in "read". All callers and references changed. * include/grub/file.h (struct grub_file): Change the types of "offset" and "size" to grub_off_t and grub_off_t, respectively. Change the type of SECTOR to grub_disk_addr_t in "read_hook". (grub_file_read): Change the type of LEN to grub_size_t. (grub_file_seek): Return grub_off_t. Change the type of OFFSET to grub_off_t. (grub_file_size): Return grub_off_t. (grub_file_tell): Likewise. All callers and references changed. * include/grub/disk.h (struct grub_disk_dev): Change the types of SECTOR and SIZE to grub_disk_addr_t and grub_size_t in "read" and "write". (struct grub_disk): Change the type of "total_sectors" to grub_uint64_t. Change the type of SECTOR to grub_disk_addr_t in "read_hook". (grub_disk_read): Change the types of SECTOR, OFFSET and SIZE to grub_disk_addr_t, grub_off_t and grub_size_t, respectively. (grub_disk_write): Likewise. All callers and references changed. * fs/iso9660.c (grub_iso9660_susp_iterate): Cast parameters to char * for grub_strncmp to silence gcc. (grub_iso9660_mount): Likewise. (grub_iso9660_mount): Likewise. (grub_iso9660_read_symlink): Likewise. Also, remove the nonsense return statement. (grub_iso9660_iterate_dir): Likewise. (grub_iso9660_label): Cast DATA->VOLDESC.VOLNAME to char *. * fs/hfs.c (grub_hfs_read_file): Change the types of SECTOR and LEN to grub_disk_addr_t and grub_size_t, respectively. * fs/hfsplus.c (grub_hfsplus_read_file): Likewise. * fs/jfs.c (grub_jfs_read_file): Likewise. * fs/minix.c (grub_jfs_read_file): Likewise. * fs/sfs.c (grub_jfs_read_file): Likewise. * fs/ufs.c (grub_jfs_read_file): Likewise. * fs/xfs.c (grub_jfs_read_file): Likewise. * fs/fat.c (grub_fat_read_data): Change the types of SECTOR, LEN and SIZE to grub_disk_addr_t, grub_size_t and grub_size_t, respectively. * fs/ext2.c (grub_ext2_read_block): When an error happens, set BLKNR to -1 instead of returning GRUB_ERRNO. (grub_ext2_read_file): Change the types of SECTOR and LEN to grub_disk_addr_t and grub_size_t, respectively. * fs/affs.c (grub_affs_read_file): Change the types of SECTOR and LEN to grub_disk_addr_t and grub_size_t, respectively. * font/manager.c (grub_font_get_glyph): Cast BITMAP to char * for grub_file_read. * disk/ieee1275/ofdisk.c (grub_ofdisk_read): Fix the format string. Do not cast SECTOR explicitly. * disk/i386/pc/biosdisk.c (grub_biosdisk_open): Change the type of TOTAL_SECTORS to grub_uint64_t. Do not mask DRP->TOTAL_SECTORS. (grub_biosdisk_rw): Change the types of SECTOR and SIZE to grub_disk_addr_t and grub_size_t, respectively. If the sector is over 2TB and LBA mode is not supported, raise an error. (get_safe_sectors): New function. (grub_biosdisk_read): Use get_safe_sectors. (grub_biosdisk_write): Likewise. * disk/efi/efidisk.c (grub_efidisk_read): Fix the format string. (grub_efidisk_write): Likewise. * disk/loopback.c (delete_loopback): Cosmetic changes. (grub_cmd_loopback): Likewise. Also, test NEWDEV->FILENAME correctly. (grub_loopback_open): Likewise. (grub_loopback_read): Likewise. Also, change the type of POS to grub_off_t, and fix the usage of grub_memset. * commands/i386/pc/play.c: Include grub/machine/time.h. * commands/ls.c (grub_ls_list_files): Use "llu" instead of "d" to print FILE->SIZE. * commands/configfile.c: Include grub/env.h. * commands/cmp.c (grub_cmd_cmp): Do not use ERR, but use GRUB_ERRNO directly instead. Change the type of POS to grub_off_t. Follow the coding standard. * commands/blocklist.c: Include grub/partition.h. (grub_cmd_blocklist): Return an error if the underlying device is not a disk. Take the starting sector of a partition into account, if a partition is used. * boot/i386/pc/diskboot.S (bootloop): Adapted to the new offset of a length field. (lba_mode): Support 64-bit addresses. (chs_mode): Likewise. (copy_buffer): Adapted to the new offsets of a length field and a segment field. (blocklist_default_start): Allocate 64-bit space. * boot/i386/pc/boot.S (force_lba): Removed. (boot_drive): Moved to under KERNEL_SECTOR. (kernel_sector): Moved to under KENREL_SEGMENT. Allocate 64-bit space. (real_start): Set %si earlier. Remove code for FORCE_LBA, since it is useless. (lba_mode): Refactored to support a 64-bit address. More size optimization. (setup_sectors): Likewise.
777 lines
18 KiB
C
777 lines
18 KiB
C
/* iso9660.c - iso9660 implementation with extensions:
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SUSP, Rock Ridge. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2004,2005,2006 Free Software Foundation, Inc.
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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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#define GRUB_ISO9660_FSTYPE_DIR 0040000
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#define GRUB_ISO9660_FSTYPE_REG 0100000
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#define GRUB_ISO9660_FSTYPE_SYMLINK 0120000
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#define GRUB_ISO9660_FSTYPE_MASK 0170000
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#define GRUB_ISO9660_LOG2_BLKSZ 2
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#define GRUB_ISO9660_BLKSZ 2048
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#define GRUB_ISO9660_RR_DOT 2
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#define GRUB_ISO9660_RR_DOTDOT 4
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/* The head of a volume descriptor. */
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struct grub_iso9660_voldesc
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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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} __attribute__ ((packed));
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/* A directory entry. */
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struct grub_iso9660_dir
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{
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grub_uint8_t len;
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grub_uint8_t ext_sectors;
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grub_uint32_t first_sector;
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grub_uint32_t first_sector_be;
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grub_uint32_t size;
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grub_uint32_t size_be;
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grub_uint8_t unused1[7];
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grub_uint8_t flags;
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grub_uint8_t unused2[6];
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grub_uint8_t namelen;
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} __attribute__ ((packed));
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/* The primary volume descriptor. Only little endian is used. */
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struct grub_iso9660_primary_voldesc
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{
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struct grub_iso9660_voldesc voldesc;
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grub_uint8_t unused1[33];
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grub_uint8_t volname[32];
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grub_uint8_t unused2[60];
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grub_uint32_t path_table_size;
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grub_uint8_t unused3[4];
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grub_uint32_t path_table;
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grub_uint8_t unused4[12];
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struct grub_iso9660_dir rootdir;
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} __attribute__ ((packed));
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/* A single entry in the path table. */
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struct grub_iso9660_path
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{
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grub_uint8_t len;
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grub_uint8_t sectors;
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grub_uint32_t first_sector;
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grub_uint16_t parentdir;
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grub_uint8_t name[0];
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} __attribute__ ((packed));
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/* An entry in the System Usage area of the directory entry. */
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struct grub_iso9660_susp_entry
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{
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grub_uint8_t sig[2];
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grub_uint8_t len;
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grub_uint8_t version;
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grub_uint8_t data[0];
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} __attribute__ ((packed));
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/* The CE entry. This is used to describe the next block where data
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can be found. */
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struct grub_iso9660_susp_ce
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{
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struct grub_iso9660_susp_entry entry;
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grub_uint32_t blk;
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grub_uint32_t blk_be;
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grub_uint32_t off;
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grub_uint32_t off_be;
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grub_uint32_t len;
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grub_uint32_t len_be;
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} __attribute__ ((packed));
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struct grub_iso9660_data
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{
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struct grub_iso9660_primary_voldesc voldesc;
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grub_disk_t disk;
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unsigned int first_sector;
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unsigned int length;
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int rockridge;
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int susp_skip;
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};
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struct grub_fshelp_node
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{
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struct grub_iso9660_data *data;
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unsigned int size;
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unsigned int blk;
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unsigned int dir_blk;
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unsigned int dir_off;
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};
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#ifndef GRUB_UTIL
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static grub_dl_t my_mod;
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#endif
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/* Iterate over the susp entries, starting with block SUA_BLOCK on the
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offset SUA_POS with a size of SUA_SIZE bytes. Hook is called for
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every entry. */
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static grub_err_t
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grub_iso9660_susp_iterate (struct grub_iso9660_data *data,
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int sua_block, int sua_pos, int sua_size,
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grub_err_t (*hook)
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(struct grub_iso9660_susp_entry *entry))
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{
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char *sua;
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struct grub_iso9660_susp_entry *entry;
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auto grub_err_t load_sua (void);
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/* Load a part of the System Usage Area. */
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grub_err_t load_sua (void)
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{
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sua = grub_malloc (sua_size);
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if (!sua)
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return grub_errno;
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if (grub_disk_read (data->disk, sua_block, sua_pos,
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sua_size, sua))
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return grub_errno;
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entry = (struct grub_iso9660_susp_entry *) sua;
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return 0;
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}
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if (load_sua ())
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return grub_errno;
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for (; (char *) entry < (char *) sua + sua_size - 1;
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entry = (struct grub_iso9660_susp_entry *)
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((char *) entry + entry->len))
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{
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/* The last entry. */
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if (grub_strncmp ((char *) entry->sig, "ST", 2) == 0)
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break;
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/* Additional entries are stored elsewhere. */
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if (grub_strncmp ((char *) entry->sig, "CE", 2) == 0)
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{
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struct grub_iso9660_susp_ce *ce;
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ce = (struct grub_iso9660_susp_ce *) entry;
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sua_size = grub_le_to_cpu32 (ce->len);
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sua_pos = grub_le_to_cpu32 (ce->off);
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sua_block = grub_le_to_cpu32 (ce->blk) << GRUB_ISO9660_LOG2_BLKSZ;
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grub_free (sua);
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if (load_sua ())
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return grub_errno;
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}
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if (hook (entry))
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{
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grub_free (sua);
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return 0;
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}
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}
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grub_free (sua);
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return 0;
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}
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static struct grub_iso9660_data *
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grub_iso9660_mount (grub_disk_t disk)
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{
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struct grub_iso9660_data *data = 0;
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struct grub_iso9660_dir rootdir;
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int sua_pos;
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int sua_size;
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char *sua;
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struct grub_iso9660_susp_entry *entry;
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auto grub_err_t susp_iterate (struct grub_iso9660_susp_entry *);
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grub_err_t susp_iterate (struct grub_iso9660_susp_entry *susp_entry)
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{
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/* The "ER" entry is used to detect extensions. The
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`IEEE_P1285' extension means Rock ridge. */
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if (grub_strncmp ((char *) susp_entry->sig, "ER", 2) == 0)
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{
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data->rockridge = 1;
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return 1;
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}
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return 0;
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}
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data = grub_malloc (sizeof (struct grub_iso9660_data));
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if (! data)
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return 0;
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/* Read the superblock. */
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if (grub_disk_read (disk, 16 << GRUB_ISO9660_LOG2_BLKSZ, 0,
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sizeof (struct grub_iso9660_primary_voldesc),
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(char *) &data->voldesc))
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{
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grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
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goto fail;
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}
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if (grub_strncmp ((char *) data->voldesc.voldesc.magic, "CD001", 5) == 0)
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{
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grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
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goto fail;
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}
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data->disk = disk;
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data->rockridge = 0;
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/* Read the system use area and test it to see if SUSP is
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supported. */
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if (grub_disk_read (disk, (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
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<< GRUB_ISO9660_LOG2_BLKSZ), 0,
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sizeof (rootdir), (char *) &rootdir))
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{
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grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
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goto fail;
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}
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if (grub_disk_read (disk, (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
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<< GRUB_ISO9660_LOG2_BLKSZ), 0,
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sizeof (rootdir), (char *) &rootdir))
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{
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grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
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goto fail;
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}
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sua_pos = (sizeof (rootdir) + rootdir.namelen
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+ (rootdir.namelen % 2) - 1);
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sua_size = rootdir.len - sua_pos;
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sua = grub_malloc (sua_size);
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if (!sua)
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goto fail;
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if (grub_disk_read (disk, (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
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<< GRUB_ISO9660_LOG2_BLKSZ), sua_pos,
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sua_size, sua))
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{
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grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
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goto fail;
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}
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entry = (struct grub_iso9660_susp_entry *) sua;
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/* Test if the SUSP protocol is used on this filesystem. */
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if (grub_strncmp ((char *) entry->sig, "SP", 2) == 0)
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{
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/* The 2nd data byte stored how many bytes are skipped everytime
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to get to the SUA (System Usage Area). */
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data->susp_skip = entry->data[2];
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entry = (struct grub_iso9660_susp_entry *) ((char *) entry + entry->len);
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/* Iterate over the entries in the SUA area to detect
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entensions. */
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if (grub_iso9660_susp_iterate (data,
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(grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
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<< GRUB_ISO9660_LOG2_BLKSZ),
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sua_pos, sua_size, susp_iterate))
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goto fail;
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}
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return data;
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fail:
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grub_free (data);
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return 0;
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}
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static char *
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grub_iso9660_read_symlink (grub_fshelp_node_t node)
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{
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struct grub_iso9660_dir dirent;
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int sua_off;
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int sua_size;
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char *symlink = 0;
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int addslash = 0;
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auto void add_part (const char *part, int len);
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auto grub_err_t susp_iterate_sl (struct grub_iso9660_susp_entry *);
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/* Extend the symlink. */
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void add_part (const char *part, int len)
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{
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int size = grub_strlen (symlink);
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symlink = grub_realloc (symlink, size + len + 1);
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if (! symlink)
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return;
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|
||
grub_strncat (symlink, part, len);
|
||
}
|
||
|
||
/* Read in a symlink. */
|
||
grub_err_t susp_iterate_sl (struct grub_iso9660_susp_entry *entry)
|
||
{
|
||
if (grub_strncmp ("SL", (char *) entry->sig, 2) == 0)
|
||
{
|
||
unsigned int pos = 1;
|
||
|
||
/* The symlink is not stored as a POSIX symlink, translate it. */
|
||
while (pos < grub_le_to_cpu32 (entry->len))
|
||
{
|
||
if (addslash)
|
||
{
|
||
add_part ("/", 1);
|
||
addslash = 0;
|
||
}
|
||
|
||
/* The current position is the `Component Flag'. */
|
||
switch (entry->data[pos] & 30)
|
||
{
|
||
case 0:
|
||
{
|
||
/* The data on pos + 2 is the actual data, pos + 1
|
||
is the length. Both are part of the `Component
|
||
Record'. */
|
||
add_part ((char *) &entry->data[pos + 2],
|
||
entry->data[pos + 1]);
|
||
if ((entry->data[pos] & 1))
|
||
addslash = 1;
|
||
|
||
break;
|
||
}
|
||
|
||
case 2:
|
||
add_part ("./", 2);
|
||
break;
|
||
|
||
case 4:
|
||
add_part ("../", 3);
|
||
break;
|
||
|
||
case 8:
|
||
add_part ("/", 1);
|
||
break;
|
||
}
|
||
/* In pos + 1 the length of the `Component Record' is
|
||
stored. */
|
||
pos += entry->data[pos + 1] + 2;
|
||
}
|
||
|
||
/* Check if `grub_realloc' failed. */
|
||
if (grub_errno)
|
||
return grub_errno;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
if (grub_disk_read (node->data->disk, node->dir_blk, node->dir_off,
|
||
sizeof (dirent), (char *) &dirent))
|
||
return 0;
|
||
|
||
sua_off = (sizeof (dirent) + dirent.namelen + 1 - (dirent.namelen % 2)
|
||
+ node->data->susp_skip);
|
||
sua_size = dirent.len - sua_off;
|
||
|
||
symlink = grub_malloc (1);
|
||
if (!symlink)
|
||
return 0;
|
||
|
||
*symlink = '\0';
|
||
|
||
if (grub_iso9660_susp_iterate (node->data, node->dir_blk,
|
||
node->dir_off + sua_off,
|
||
sua_size, susp_iterate_sl))
|
||
{
|
||
grub_free (symlink);
|
||
return 0;
|
||
}
|
||
|
||
return symlink;
|
||
}
|
||
|
||
|
||
static int
|
||
grub_iso9660_iterate_dir (grub_fshelp_node_t dir,
|
||
int NESTED_FUNC_ATTR
|
||
(*hook) (const char *filename,
|
||
enum grub_fshelp_filetype filetype,
|
||
grub_fshelp_node_t node))
|
||
{
|
||
struct grub_iso9660_dir dirent;
|
||
unsigned int offset = 0;
|
||
char *filename;
|
||
int filename_alloc = 0;
|
||
enum grub_fshelp_filetype type;
|
||
|
||
auto grub_err_t susp_iterate_dir (struct grub_iso9660_susp_entry *);
|
||
|
||
grub_err_t susp_iterate_dir (struct grub_iso9660_susp_entry *entry)
|
||
{
|
||
/* The filename in the rock ridge entry. */
|
||
if (grub_strncmp ("NM", (char *) entry->sig, 2) == 0)
|
||
{
|
||
/* The flags are stored at the data position 0, here the
|
||
filename type is stored. */
|
||
if (entry->data[0] & GRUB_ISO9660_RR_DOT)
|
||
filename = ".";
|
||
else if (entry->data[0] & GRUB_ISO9660_RR_DOTDOT)
|
||
filename = "..";
|
||
else
|
||
{
|
||
int size = 1;
|
||
if (filename)
|
||
{
|
||
size += grub_strlen (filename);
|
||
grub_realloc (filename,
|
||
grub_strlen (filename)
|
||
+ entry->len);
|
||
}
|
||
else
|
||
{
|
||
size = entry->len - 5;
|
||
filename = grub_malloc (size + 1);
|
||
filename[0] = '\0';
|
||
}
|
||
filename_alloc = 1;
|
||
grub_strncpy (filename, (char *) &entry->data[1], size);
|
||
filename[size] = '\0';
|
||
}
|
||
}
|
||
/* The mode information (st_mode). */
|
||
else if (grub_strncmp ((char *) entry->sig, "PX", 2) == 0)
|
||
{
|
||
/* At position 0 of the PX record the st_mode information is
|
||
stored. */
|
||
grub_uint32_t mode = ((*(grub_uint32_t *) &entry->data[0])
|
||
& GRUB_ISO9660_FSTYPE_MASK);
|
||
|
||
switch (mode)
|
||
{
|
||
case GRUB_ISO9660_FSTYPE_DIR:
|
||
type = GRUB_FSHELP_DIR;
|
||
break;
|
||
case GRUB_ISO9660_FSTYPE_REG:
|
||
type = GRUB_FSHELP_REG;
|
||
break;
|
||
case GRUB_ISO9660_FSTYPE_SYMLINK:
|
||
type = GRUB_FSHELP_SYMLINK;
|
||
break;
|
||
default:
|
||
type = GRUB_FSHELP_UNKNOWN;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
while (offset < dir->size)
|
||
{
|
||
if (grub_disk_read (dir->data->disk,
|
||
(dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
|
||
+ offset / GRUB_DISK_SECTOR_SIZE,
|
||
offset % GRUB_DISK_SECTOR_SIZE,
|
||
sizeof (dirent), (char *) &dirent))
|
||
return 0;
|
||
|
||
/* The end of the block, skip to the next one. */
|
||
if (!dirent.len)
|
||
{
|
||
offset = (offset / GRUB_ISO9660_BLKSZ + 1) * GRUB_ISO9660_BLKSZ;
|
||
continue;
|
||
}
|
||
|
||
{
|
||
char name[dirent.namelen + 1];
|
||
int nameoffset = offset + sizeof (dirent);
|
||
struct grub_fshelp_node *node;
|
||
int sua_off = (sizeof (dirent) + dirent.namelen + 1
|
||
- (dirent.namelen % 2));;
|
||
int sua_size = dirent.len - sua_off;
|
||
|
||
sua_off += offset + dir->data->susp_skip;
|
||
|
||
filename = 0;
|
||
filename_alloc = 0;
|
||
type = GRUB_FSHELP_UNKNOWN;
|
||
|
||
if (dir->data->rockridge
|
||
&& grub_iso9660_susp_iterate (dir->data,
|
||
(dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
|
||
+ (sua_off
|
||
/ GRUB_DISK_SECTOR_SIZE),
|
||
sua_off % GRUB_DISK_SECTOR_SIZE,
|
||
sua_size, susp_iterate_dir))
|
||
return 0;
|
||
|
||
/* Read the name. */
|
||
if (grub_disk_read (dir->data->disk,
|
||
(dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
|
||
+ nameoffset / GRUB_DISK_SECTOR_SIZE,
|
||
nameoffset % GRUB_DISK_SECTOR_SIZE,
|
||
dirent.namelen, (char *) name))
|
||
return 0;
|
||
|
||
node = grub_malloc (sizeof (struct grub_fshelp_node));
|
||
if (!node)
|
||
return 0;
|
||
|
||
/* Setup a new node. */
|
||
node->data = dir->data;
|
||
node->size = grub_le_to_cpu32 (dirent.size);
|
||
node->blk = grub_le_to_cpu32 (dirent.first_sector);
|
||
node->dir_blk = ((dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
|
||
+ offset / GRUB_DISK_SECTOR_SIZE);
|
||
node->dir_off = offset % GRUB_DISK_SECTOR_SIZE;
|
||
|
||
/* If the filetype was not stored using rockridge, use
|
||
whatever is stored in the iso9660 filesystem. */
|
||
if (type == GRUB_FSHELP_UNKNOWN)
|
||
{
|
||
if ((dirent.flags & 3) == 2)
|
||
type = GRUB_FSHELP_DIR;
|
||
else
|
||
type = GRUB_FSHELP_REG;
|
||
}
|
||
|
||
/* The filename was not stored in a rock ridge entry. Read it
|
||
from the iso9660 filesystem. */
|
||
if (!filename)
|
||
{
|
||
name[dirent.namelen] = '\0';
|
||
filename = grub_strrchr (name, ';');
|
||
if (filename)
|
||
*filename = '\0';
|
||
|
||
if (dirent.namelen == 1 && name[0] == 0)
|
||
filename = ".";
|
||
else if (dirent.namelen == 1 && name[0] == 1)
|
||
filename = "..";
|
||
else
|
||
filename = name;
|
||
}
|
||
|
||
if (hook (filename, type, node))
|
||
{
|
||
if (filename_alloc)
|
||
grub_free (filename);
|
||
return 1;
|
||
}
|
||
if (filename_alloc)
|
||
grub_free (filename);
|
||
}
|
||
|
||
offset += dirent.len;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
static grub_err_t
|
||
grub_iso9660_dir (grub_device_t device, const char *path,
|
||
int (*hook) (const char *filename, int dir))
|
||
{
|
||
struct grub_iso9660_data *data = 0;
|
||
struct grub_fshelp_node rootnode;
|
||
struct grub_fshelp_node *foundnode;
|
||
|
||
auto int NESTED_FUNC_ATTR iterate (const char *filename,
|
||
enum grub_fshelp_filetype filetype,
|
||
grub_fshelp_node_t node);
|
||
|
||
int NESTED_FUNC_ATTR iterate (const char *filename,
|
||
enum grub_fshelp_filetype filetype,
|
||
grub_fshelp_node_t node)
|
||
{
|
||
grub_free (node);
|
||
|
||
if (filetype == GRUB_FSHELP_DIR)
|
||
return hook (filename, 1);
|
||
else
|
||
return hook (filename, 0);
|
||
|
||
return 0;
|
||
}
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_ref (my_mod);
|
||
#endif
|
||
|
||
data = grub_iso9660_mount (device->disk);
|
||
if (!data)
|
||
goto fail;
|
||
|
||
rootnode.data = data;
|
||
rootnode.blk = grub_le_to_cpu32 (data->voldesc.rootdir.first_sector);
|
||
rootnode.size = grub_le_to_cpu32 (data->voldesc.rootdir.size);
|
||
|
||
/* Use the fshelp function to traverse the path. */
|
||
if (grub_fshelp_find_file (path, &rootnode,
|
||
&foundnode,
|
||
grub_iso9660_iterate_dir,
|
||
grub_iso9660_read_symlink,
|
||
GRUB_FSHELP_DIR))
|
||
goto fail;
|
||
|
||
/* List the files in the directory. */
|
||
grub_iso9660_iterate_dir (foundnode, iterate);
|
||
|
||
if (foundnode != &rootnode)
|
||
grub_free (foundnode);
|
||
|
||
fail:
|
||
grub_free (data);
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
/* Open a file named NAME and initialize FILE. */
|
||
static grub_err_t
|
||
grub_iso9660_open (struct grub_file *file, const char *name)
|
||
{
|
||
struct grub_iso9660_data *data;
|
||
struct grub_fshelp_node rootnode;
|
||
struct grub_fshelp_node *foundnode;
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_ref (my_mod);
|
||
#endif
|
||
|
||
data = grub_iso9660_mount (file->device->disk);
|
||
if (!data)
|
||
goto fail;
|
||
|
||
rootnode.data = data;
|
||
rootnode.blk = grub_le_to_cpu32 (data->voldesc.rootdir.first_sector);
|
||
rootnode.size = grub_le_to_cpu32 (data->voldesc.rootdir.size);
|
||
|
||
/* Use the fshelp function to traverse the path. */
|
||
if (grub_fshelp_find_file (name, &rootnode,
|
||
&foundnode,
|
||
grub_iso9660_iterate_dir,
|
||
grub_iso9660_read_symlink,
|
||
GRUB_FSHELP_REG))
|
||
goto fail;
|
||
|
||
data->first_sector = foundnode->blk;
|
||
data->length = foundnode->size;
|
||
|
||
file->data = data;
|
||
file->size = foundnode->size;
|
||
file->offset = 0;
|
||
|
||
return 0;
|
||
|
||
fail:
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
grub_free (data);
|
||
|
||
return grub_errno;;
|
||
}
|
||
|
||
|
||
static grub_ssize_t
|
||
grub_iso9660_read (grub_file_t file, char *buf, grub_size_t len)
|
||
{
|
||
struct grub_iso9660_data *data =
|
||
(struct grub_iso9660_data *) file->data;
|
||
|
||
/* XXX: The file is stored in as a single extent. */
|
||
data->disk->read_hook = file->read_hook;
|
||
grub_disk_read (data->disk,
|
||
data->first_sector << GRUB_ISO9660_LOG2_BLKSZ,
|
||
file->offset,
|
||
len, buf);
|
||
data->disk->read_hook = 0;
|
||
|
||
return len;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_iso9660_close (grub_file_t file)
|
||
{
|
||
grub_free (file->data);
|
||
|
||
#ifndef GRUB_UTIL
|
||
grub_dl_unref (my_mod);
|
||
#endif
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_iso9660_label (grub_device_t device, char **label)
|
||
{
|
||
struct grub_iso9660_data *data;
|
||
data = grub_iso9660_mount (device->disk);
|
||
|
||
if (data)
|
||
{
|
||
*label = grub_strndup ((char *) data->voldesc.volname, 32);
|
||
grub_free (data);
|
||
}
|
||
else
|
||
*label = 0;
|
||
|
||
return grub_errno;
|
||
}
|
||
|
||
|
||
|
||
static struct grub_fs grub_iso9660_fs =
|
||
{
|
||
.name = "iso9660",
|
||
.dir = grub_iso9660_dir,
|
||
.open = grub_iso9660_open,
|
||
.read = grub_iso9660_read,
|
||
.close = grub_iso9660_close,
|
||
.label = grub_iso9660_label,
|
||
.next = 0
|
||
};
|
||
|
||
GRUB_MOD_INIT(iso9660)
|
||
{
|
||
grub_fs_register (&grub_iso9660_fs);
|
||
#ifndef GRUB_UTIL
|
||
my_mod = mod;
|
||
#endif
|
||
}
|
||
|
||
GRUB_MOD_FINI(iso9660)
|
||
{
|
||
grub_fs_unregister (&grub_iso9660_fs);
|
||
}
|