mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
1409 lines
42 KiB
C
1409 lines
42 KiB
C
/* reiserfs.c - ReiserFS versions up to 3.6 */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005,2008 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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/*
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TODO:
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implement journal handling (ram replay)
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test tail packing & direct files
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validate partition label position
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*/
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#if 0
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# define GRUB_REISERFS_DEBUG
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# define GRUB_REISERFS_JOURNALING
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# define GRUB_HEXDUMP
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#endif
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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/i18n.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#undef MIN
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#define MIN(a, b) \
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({ typeof (a) _a = (a); \
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typeof (b) _b = (b); \
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_a < _b ? _a : _b; })
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#undef MAX
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#define MAX(a, b) \
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({ typeof (a) _a = (a); \
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typeof (b) _b = (b); \
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_a > _b ? _a : _b; })
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#define REISERFS_SUPER_BLOCK_OFFSET 0x10000
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#define REISERFS_MAGIC_LEN 12
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#define REISERFS_MAGIC_STRING "ReIsEr"
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#define REISERFS_MAGIC_DESC_BLOCK "ReIsErLB"
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/* If the 3rd bit of an item state is set, then it's visible. */
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#define GRUB_REISERFS_VISIBLE_MASK ((grub_uint16_t) 0x04)
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#define S_IFLNK 0xA000
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static grub_dl_t my_mod;
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#define assert(boolean) real_assert (boolean, GRUB_STRINGIFY(GRUB_FILE), __LINE__)
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static inline void
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real_assert (int boolean, const char *file, const int line)
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{
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if (! boolean)
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grub_printf ("Assertion failed at %s:%d\n", file, line);
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}
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enum grub_reiserfs_item_type
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{
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GRUB_REISERFS_STAT,
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GRUB_REISERFS_DIRECTORY,
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GRUB_REISERFS_DIRECT,
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GRUB_REISERFS_INDIRECT,
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/* Matches both _DIRECT and _INDIRECT when searching. */
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GRUB_REISERFS_ANY,
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GRUB_REISERFS_UNKNOWN
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};
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struct grub_reiserfs_superblock
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{
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grub_uint32_t block_count;
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grub_uint32_t block_free_count;
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grub_uint32_t root_block;
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grub_uint32_t journal_block;
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grub_uint32_t journal_device;
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grub_uint32_t journal_original_size;
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grub_uint32_t journal_max_transaction_size;
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grub_uint32_t journal_block_count;
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grub_uint32_t journal_max_batch;
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grub_uint32_t journal_max_commit_age;
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grub_uint32_t journal_max_transaction_age;
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grub_uint16_t block_size;
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grub_uint16_t oid_max_size;
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grub_uint16_t oid_current_size;
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grub_uint16_t state;
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grub_uint8_t magic_string[REISERFS_MAGIC_LEN];
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grub_uint32_t function_hash_code;
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grub_uint16_t tree_height;
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grub_uint16_t bitmap_number;
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grub_uint16_t version;
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grub_uint16_t reserved;
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grub_uint32_t inode_generation;
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grub_uint8_t unused[4];
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grub_uint16_t uuid[8];
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char label[16];
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} GRUB_PACKED;
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struct grub_reiserfs_journal_header
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{
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grub_uint32_t last_flush_uid;
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grub_uint32_t unflushed_offset;
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grub_uint32_t mount_id;
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} GRUB_PACKED;
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struct grub_reiserfs_description_block
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{
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grub_uint32_t id;
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grub_uint32_t len;
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grub_uint32_t mount_id;
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grub_uint32_t real_blocks[0];
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} GRUB_PACKED;
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struct grub_reiserfs_commit_block
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{
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grub_uint32_t id;
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grub_uint32_t len;
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grub_uint32_t real_blocks[0];
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} GRUB_PACKED;
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struct grub_reiserfs_stat_item_v1
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{
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grub_uint16_t mode;
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grub_uint16_t hardlink_count;
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grub_uint16_t uid;
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grub_uint16_t gid;
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grub_uint32_t size;
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grub_uint32_t atime;
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grub_uint32_t mtime;
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grub_uint32_t ctime;
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grub_uint32_t rdev;
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grub_uint32_t first_direct_byte;
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} GRUB_PACKED;
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struct grub_reiserfs_stat_item_v2
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{
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grub_uint16_t mode;
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grub_uint16_t reserved;
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grub_uint32_t hardlink_count;
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grub_uint64_t size;
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grub_uint32_t uid;
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grub_uint32_t gid;
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grub_uint32_t atime;
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grub_uint32_t mtime;
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grub_uint32_t ctime;
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grub_uint32_t blocks;
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grub_uint32_t first_direct_byte;
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} GRUB_PACKED;
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struct grub_reiserfs_key
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{
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grub_uint32_t directory_id;
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grub_uint32_t object_id;
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union
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{
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struct
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{
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grub_uint32_t offset;
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grub_uint32_t type;
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} GRUB_PACKED v1;
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struct
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{
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grub_uint64_t offset_type;
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} GRUB_PACKED v2;
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} u;
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} GRUB_PACKED;
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struct grub_reiserfs_item_header
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{
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struct grub_reiserfs_key key;
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union
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{
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grub_uint16_t free_space;
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grub_uint16_t entry_count;
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} GRUB_PACKED u;
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grub_uint16_t item_size;
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grub_uint16_t item_location;
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grub_uint16_t version;
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} GRUB_PACKED;
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struct grub_reiserfs_block_header
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{
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grub_uint16_t level;
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grub_uint16_t item_count;
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grub_uint16_t free_space;
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grub_uint16_t reserved;
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struct grub_reiserfs_key block_right_delimiting_key;
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} GRUB_PACKED;
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struct grub_reiserfs_disk_child
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{
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grub_uint32_t block_number;
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grub_uint16_t size;
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grub_uint16_t reserved;
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} GRUB_PACKED;
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struct grub_reiserfs_directory_header
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{
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grub_uint32_t offset;
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grub_uint32_t directory_id;
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grub_uint32_t object_id;
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grub_uint16_t location;
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grub_uint16_t state;
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} GRUB_PACKED;
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struct grub_fshelp_node
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{
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struct grub_reiserfs_data *data;
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grub_uint32_t block_number; /* 0 if node is not found. */
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grub_uint16_t block_position;
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grub_uint64_t next_offset;
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grub_int32_t mtime;
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grub_off_t size;
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enum grub_reiserfs_item_type type; /* To know how to read the header. */
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struct grub_reiserfs_item_header header;
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};
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/* Returned when opening a file. */
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struct grub_reiserfs_data
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{
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struct grub_reiserfs_superblock superblock;
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grub_disk_t disk;
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};
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static grub_ssize_t
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grub_reiserfs_read_real (struct grub_fshelp_node *node,
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grub_off_t off, char *buf, grub_size_t len,
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grub_disk_read_hook_t read_hook,
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void *read_hook_data);
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/* Internal-only functions. Not to be used outside of this file. */
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/* Return the type of given v2 key. */
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static enum grub_reiserfs_item_type
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grub_reiserfs_get_key_v2_type (const struct grub_reiserfs_key *key)
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{
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switch (grub_le_to_cpu64 (key->u.v2.offset_type) >> 60)
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{
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case 0:
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return GRUB_REISERFS_STAT;
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case 15:
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return GRUB_REISERFS_ANY;
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case 3:
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return GRUB_REISERFS_DIRECTORY;
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case 2:
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return GRUB_REISERFS_DIRECT;
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case 1:
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return GRUB_REISERFS_INDIRECT;
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}
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return GRUB_REISERFS_UNKNOWN;
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}
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/* Return the type of given v1 key. */
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static enum grub_reiserfs_item_type
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grub_reiserfs_get_key_v1_type (const struct grub_reiserfs_key *key)
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{
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switch (grub_le_to_cpu32 (key->u.v1.type))
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{
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case 0:
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return GRUB_REISERFS_STAT;
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case 555:
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return GRUB_REISERFS_ANY;
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case 500:
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return GRUB_REISERFS_DIRECTORY;
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case 0x20000000:
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case 0xFFFFFFFF:
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return GRUB_REISERFS_DIRECT;
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case 0x10000000:
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case 0xFFFFFFFE:
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return GRUB_REISERFS_INDIRECT;
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}
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return GRUB_REISERFS_UNKNOWN;
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}
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/* Return 1 if the given key is version 1 key, 2 otherwise. */
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static int
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grub_reiserfs_get_key_version (const struct grub_reiserfs_key *key)
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{
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return grub_reiserfs_get_key_v1_type (key) == GRUB_REISERFS_UNKNOWN ? 2 : 1;
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}
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#ifdef GRUB_HEXDUMP
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static void
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grub_hexdump (char *buffer, grub_size_t len)
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{
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grub_size_t a;
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for (a = 0; a < len; a++)
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{
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if (! (a & 0x0F))
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grub_printf ("\n%08x ", a);
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grub_printf ("%02x ",
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((unsigned int) ((unsigned char *) buffer)[a]) & 0xFF);
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}
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grub_printf ("\n");
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}
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#endif
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#ifdef GRUB_REISERFS_DEBUG
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static grub_uint64_t
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grub_reiserfs_get_key_offset (const struct grub_reiserfs_key *key);
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static enum grub_reiserfs_item_type
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grub_reiserfs_get_key_type (const struct grub_reiserfs_key *key);
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static void
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grub_reiserfs_print_key (const struct grub_reiserfs_key *key)
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{
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unsigned int a;
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char *reiserfs_type_strings[] = {
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"stat ",
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"directory",
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"direct ",
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"indirect ",
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"any ",
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"unknown "
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};
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for (a = 0; a < sizeof (struct grub_reiserfs_key); a++)
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grub_printf ("%02x ", ((unsigned int) ((unsigned char *) key)[a]) & 0xFF);
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grub_printf ("parent id = 0x%08x, self id = 0x%08x, type = %s, offset = ",
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grub_le_to_cpu32 (key->directory_id),
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grub_le_to_cpu32 (key->object_id),
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reiserfs_type_strings [grub_reiserfs_get_key_type (key)]);
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if (grub_reiserfs_get_key_version (key) == 1)
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grub_printf("%08x", (unsigned int) grub_reiserfs_get_key_offset (key));
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else
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grub_printf("0x%07x%08x",
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(unsigned) (grub_reiserfs_get_key_offset (key) >> 32),
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(unsigned) (grub_reiserfs_get_key_offset (key) & 0xFFFFFFFF));
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grub_printf ("\n");
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}
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#endif
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/* Return the offset of given key. */
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static grub_uint64_t
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grub_reiserfs_get_key_offset (const struct grub_reiserfs_key *key)
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{
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if (grub_reiserfs_get_key_version (key) == 1)
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return grub_le_to_cpu32 (key->u.v1.offset);
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else
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return grub_le_to_cpu64 (key->u.v2.offset_type) & (~0ULL >> 4);
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}
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/* Set the offset of given key. */
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static void
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grub_reiserfs_set_key_offset (struct grub_reiserfs_key *key,
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grub_uint64_t value)
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{
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if (grub_reiserfs_get_key_version (key) == 1)
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key->u.v1.offset = grub_cpu_to_le32 (value);
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else
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key->u.v2.offset_type \
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= ((key->u.v2.offset_type & grub_cpu_to_le64 (15ULL << 60))
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| grub_cpu_to_le64 (value & (~0ULL >> 4)));
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}
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/* Return the type of given key. */
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static enum grub_reiserfs_item_type
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grub_reiserfs_get_key_type (const struct grub_reiserfs_key *key)
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{
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if (grub_reiserfs_get_key_version (key) == 1)
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return grub_reiserfs_get_key_v1_type (key);
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else
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return grub_reiserfs_get_key_v2_type (key);
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}
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/* Set the type of given key, with given version number. */
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static void
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grub_reiserfs_set_key_type (struct grub_reiserfs_key *key,
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enum grub_reiserfs_item_type grub_type,
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int version)
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{
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grub_uint32_t type;
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switch (grub_type)
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{
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case GRUB_REISERFS_STAT:
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type = 0;
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break;
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case GRUB_REISERFS_ANY:
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type = (version == 1) ? 555 : 15;
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break;
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case GRUB_REISERFS_DIRECTORY:
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type = (version == 1) ? 500 : 3;
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break;
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case GRUB_REISERFS_DIRECT:
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type = (version == 1) ? 0xFFFFFFFF : 2;
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break;
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case GRUB_REISERFS_INDIRECT:
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type = (version == 1) ? 0xFFFFFFFE : 1;
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break;
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default:
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return;
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}
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if (version == 1)
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key->u.v1.type = grub_cpu_to_le32 (type);
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else
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key->u.v2.offset_type
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= ((key->u.v2.offset_type & grub_cpu_to_le64 (~0ULL >> 4))
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| grub_cpu_to_le64 ((grub_uint64_t) type << 60));
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assert (grub_reiserfs_get_key_type (key) == grub_type);
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}
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/* -1 if key 1 if lower than key 2.
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0 if key 1 is equal to key 2.
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1 if key 1 is higher than key 2. */
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static int
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grub_reiserfs_compare_keys (const struct grub_reiserfs_key *key1,
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const struct grub_reiserfs_key *key2)
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{
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grub_uint64_t offset1, offset2;
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enum grub_reiserfs_item_type type1, type2;
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grub_uint32_t id1, id2;
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if (! key1 || ! key2)
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return -2;
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id1 = grub_le_to_cpu32 (key1->directory_id);
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id2 = grub_le_to_cpu32 (key2->directory_id);
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if (id1 < id2)
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return -1;
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if (id1 > id2)
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return 1;
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id1 = grub_le_to_cpu32 (key1->object_id);
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id2 = grub_le_to_cpu32 (key2->object_id);
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if (id1 < id2)
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return -1;
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if (id1 > id2)
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return 1;
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offset1 = grub_reiserfs_get_key_offset (key1);
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offset2 = grub_reiserfs_get_key_offset (key2);
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if (offset1 < offset2)
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return -1;
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if (offset1 > offset2)
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return 1;
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type1 = grub_reiserfs_get_key_type (key1);
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type2 = grub_reiserfs_get_key_type (key2);
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if ((type1 == GRUB_REISERFS_ANY
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&& (type2 == GRUB_REISERFS_DIRECT
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|| type2 == GRUB_REISERFS_INDIRECT))
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|| (type2 == GRUB_REISERFS_ANY
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&& (type1 == GRUB_REISERFS_DIRECT
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|| type1 == GRUB_REISERFS_INDIRECT)))
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return 0;
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if (type1 < type2)
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return -1;
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if (type1 > type2)
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return 1;
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return 0;
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}
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/* Find the item identified by KEY in mounted filesystem DATA, and fill ITEM
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accordingly to what was found. */
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static grub_err_t
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grub_reiserfs_get_item (struct grub_reiserfs_data *data,
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const struct grub_reiserfs_key *key,
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struct grub_fshelp_node *item, int exact)
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{
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grub_uint32_t block_number;
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struct grub_reiserfs_block_header *block_header = 0;
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struct grub_reiserfs_key *block_key = 0;
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grub_uint16_t block_size, item_count, current_level;
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grub_uint16_t i;
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grub_uint16_t previous_level = ~0;
|
|
struct grub_reiserfs_item_header *item_headers = 0;
|
|
|
|
#if 0
|
|
if (! data)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "data is NULL");
|
|
goto fail;
|
|
}
|
|
|
|
if (! key)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "key is NULL");
|
|
goto fail;
|
|
}
|
|
|
|
if (! item)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "item is NULL");
|
|
goto fail;
|
|
}
|
|
#endif
|
|
|
|
block_size = grub_le_to_cpu16 (data->superblock.block_size);
|
|
block_number = grub_le_to_cpu32 (data->superblock.root_block);
|
|
#ifdef GRUB_REISERFS_DEBUG
|
|
grub_printf("Searching for ");
|
|
grub_reiserfs_print_key (key);
|
|
#endif
|
|
block_header = grub_malloc (block_size);
|
|
if (! block_header)
|
|
goto fail;
|
|
|
|
item->next_offset = 0;
|
|
do
|
|
{
|
|
grub_disk_read (data->disk,
|
|
block_number * (block_size >> GRUB_DISK_SECTOR_BITS),
|
|
(((grub_off_t) block_number * block_size)
|
|
& (GRUB_DISK_SECTOR_SIZE - 1)),
|
|
block_size, block_header);
|
|
if (grub_errno)
|
|
goto fail;
|
|
current_level = grub_le_to_cpu16 (block_header->level);
|
|
grub_dprintf ("reiserfs_tree", " at level %d\n", current_level);
|
|
if (current_level >= previous_level)
|
|
{
|
|
grub_dprintf ("reiserfs_tree", "level loop detected, aborting\n");
|
|
grub_error (GRUB_ERR_BAD_FS, "level loop");
|
|
goto fail;
|
|
}
|
|
previous_level = current_level;
|
|
item_count = grub_le_to_cpu16 (block_header->item_count);
|
|
grub_dprintf ("reiserfs_tree", " number of contained items : %d\n",
|
|
item_count);
|
|
if (current_level > 1)
|
|
{
|
|
/* Internal node. Navigate to the child that should contain
|
|
the searched key. */
|
|
struct grub_reiserfs_key *keys
|
|
= (struct grub_reiserfs_key *) (block_header + 1);
|
|
struct grub_reiserfs_disk_child *children
|
|
= ((struct grub_reiserfs_disk_child *)
|
|
(keys + item_count));
|
|
|
|
for (i = 0;
|
|
i < item_count
|
|
&& grub_reiserfs_compare_keys (key, &(keys[i])) >= 0;
|
|
i++)
|
|
{
|
|
#ifdef GRUB_REISERFS_DEBUG
|
|
grub_printf("i %03d/%03d ", i + 1, item_count + 1);
|
|
grub_reiserfs_print_key (&(keys[i]));
|
|
#endif
|
|
}
|
|
block_number = grub_le_to_cpu32 (children[i].block_number);
|
|
if ((i < item_count) && (key->directory_id == keys[i].directory_id)
|
|
&& (key->object_id == keys[i].object_id))
|
|
item->next_offset = grub_reiserfs_get_key_offset(&(keys[i]));
|
|
#ifdef GRUB_REISERFS_DEBUG
|
|
if (i == item_count
|
|
|| grub_reiserfs_compare_keys (key, &(keys[i])) == 0)
|
|
grub_printf(">");
|
|
else
|
|
grub_printf("<");
|
|
if (i < item_count)
|
|
{
|
|
grub_printf (" %03d/%03d ", i + 1, item_count + 1);
|
|
grub_reiserfs_print_key (&(keys[i]));
|
|
if (i + 1 < item_count)
|
|
{
|
|
grub_printf ("+ %03d/%03d ", i + 2, item_count);
|
|
grub_reiserfs_print_key (&(keys[i + 1]));
|
|
}
|
|
}
|
|
else
|
|
grub_printf ("Accessing rightmost child at block %d.\n",
|
|
block_number);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
/* Leaf node. Check that the key is actually present. */
|
|
item_headers
|
|
= (struct grub_reiserfs_item_header *) (block_header + 1);
|
|
for (i = 0;
|
|
i < item_count;
|
|
i++)
|
|
{
|
|
int val;
|
|
val = grub_reiserfs_compare_keys (key, &(item_headers[i].key));
|
|
if (val == 0)
|
|
{
|
|
block_key = &(item_headers[i].key);
|
|
break;
|
|
}
|
|
if (val < 0 && exact)
|
|
break;
|
|
if (val < 0)
|
|
{
|
|
if (i == 0)
|
|
{
|
|
grub_error (GRUB_ERR_READ_ERROR, "unexpected btree node");
|
|
goto fail;
|
|
}
|
|
i--;
|
|
block_key = &(item_headers[i].key);
|
|
break;
|
|
}
|
|
}
|
|
if (!exact && i == item_count)
|
|
{
|
|
if (i == 0)
|
|
{
|
|
grub_error (GRUB_ERR_READ_ERROR, "unexpected btree node");
|
|
goto fail;
|
|
}
|
|
i--;
|
|
block_key = &(item_headers[i].key);
|
|
}
|
|
}
|
|
}
|
|
while (current_level > 1);
|
|
|
|
item->data = data;
|
|
|
|
if (!block_key)
|
|
{
|
|
item->block_number = 0;
|
|
item->block_position = 0;
|
|
item->type = GRUB_REISERFS_UNKNOWN;
|
|
#ifdef GRUB_REISERFS_DEBUG
|
|
grub_printf("Not found.\n");
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
item->block_number = block_number;
|
|
item->block_position = i;
|
|
item->type = grub_reiserfs_get_key_type (block_key);
|
|
grub_memcpy (&(item->header), &(item_headers[i]),
|
|
sizeof (struct grub_reiserfs_item_header));
|
|
#ifdef GRUB_REISERFS_DEBUG
|
|
grub_printf ("F %03d/%03d ", i + 1, item_count);
|
|
grub_reiserfs_print_key (block_key);
|
|
#endif
|
|
}
|
|
|
|
assert (grub_errno == GRUB_ERR_NONE);
|
|
grub_free (block_header);
|
|
return GRUB_ERR_NONE;
|
|
|
|
fail:
|
|
assert (grub_errno != GRUB_ERR_NONE);
|
|
grub_free (block_header);
|
|
assert (grub_errno != GRUB_ERR_NONE);
|
|
return grub_errno;
|
|
}
|
|
|
|
/* Return the path of the file which is pointed at by symlink NODE. */
|
|
static char *
|
|
grub_reiserfs_read_symlink (grub_fshelp_node_t node)
|
|
{
|
|
char *symlink_buffer = 0;
|
|
grub_size_t len = node->size;
|
|
grub_ssize_t ret;
|
|
|
|
symlink_buffer = grub_malloc (len + 1);
|
|
if (! symlink_buffer)
|
|
return 0;
|
|
|
|
ret = grub_reiserfs_read_real (node, 0, symlink_buffer, len, 0, 0);
|
|
if (ret < 0)
|
|
{
|
|
grub_free (symlink_buffer);
|
|
return 0;
|
|
}
|
|
|
|
symlink_buffer[ret] = 0;
|
|
return symlink_buffer;
|
|
}
|
|
|
|
/* Fill the mounted filesystem structure and return it. */
|
|
static struct grub_reiserfs_data *
|
|
grub_reiserfs_mount (grub_disk_t disk)
|
|
{
|
|
struct grub_reiserfs_data *data = 0;
|
|
data = grub_malloc (sizeof (*data));
|
|
if (! data)
|
|
goto fail;
|
|
grub_disk_read (disk, REISERFS_SUPER_BLOCK_OFFSET / GRUB_DISK_SECTOR_SIZE,
|
|
0, sizeof (data->superblock), &(data->superblock));
|
|
if (grub_errno)
|
|
goto fail;
|
|
if (grub_memcmp (data->superblock.magic_string,
|
|
REISERFS_MAGIC_STRING, sizeof (REISERFS_MAGIC_STRING) - 1))
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "not a ReiserFS filesystem");
|
|
goto fail;
|
|
}
|
|
data->disk = disk;
|
|
return data;
|
|
|
|
fail:
|
|
/* Disk is too small to contain a ReiserFS. */
|
|
if (grub_errno == GRUB_ERR_OUT_OF_RANGE)
|
|
grub_error (GRUB_ERR_BAD_FS, "not a ReiserFS filesystem");
|
|
|
|
grub_free (data);
|
|
return 0;
|
|
}
|
|
|
|
/* Call HOOK for each file in directory ITEM. */
|
|
static int
|
|
grub_reiserfs_iterate_dir (grub_fshelp_node_t item,
|
|
grub_fshelp_iterate_dir_hook_t hook,
|
|
void *hook_data)
|
|
{
|
|
struct grub_reiserfs_data *data = item->data;
|
|
struct grub_reiserfs_block_header *block_header = 0;
|
|
grub_uint16_t block_size, block_position;
|
|
grub_uint32_t block_number;
|
|
grub_uint64_t next_offset = item->next_offset;
|
|
int ret = 0;
|
|
|
|
if (item->type != GRUB_REISERFS_DIRECTORY)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FILE_TYPE, N_("not a directory"));
|
|
goto fail;
|
|
}
|
|
block_size = grub_le_to_cpu16 (data->superblock.block_size);
|
|
block_header = grub_malloc (block_size + 1);
|
|
if (! block_header)
|
|
goto fail;
|
|
block_number = item->block_number;
|
|
block_position = item->block_position;
|
|
grub_dprintf ("reiserfs", "Iterating directory...\n");
|
|
do
|
|
{
|
|
struct grub_reiserfs_directory_header *directory_headers;
|
|
struct grub_fshelp_node directory_item;
|
|
grub_uint16_t entry_count, entry_number;
|
|
struct grub_reiserfs_item_header *item_headers;
|
|
|
|
grub_disk_read (data->disk,
|
|
block_number * (block_size >> GRUB_DISK_SECTOR_BITS),
|
|
(((grub_off_t) block_number * block_size)
|
|
& (GRUB_DISK_SECTOR_SIZE - 1)),
|
|
block_size, (char *) block_header);
|
|
if (grub_errno)
|
|
goto fail;
|
|
|
|
((char *) block_header)[block_size] = 0;
|
|
|
|
#if 0
|
|
if (grub_le_to_cpu16 (block_header->level) != 1)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS,
|
|
"reiserfs: block %d is not a leaf block",
|
|
block_number);
|
|
goto fail;
|
|
}
|
|
#endif
|
|
|
|
item_headers = (struct grub_reiserfs_item_header *) (block_header + 1);
|
|
directory_headers
|
|
= ((struct grub_reiserfs_directory_header *)
|
|
((char *) block_header
|
|
+ grub_le_to_cpu16 (item_headers[block_position].item_location)));
|
|
entry_count
|
|
= grub_le_to_cpu16 (item_headers[block_position].u.entry_count);
|
|
for (entry_number = 0; entry_number < entry_count; entry_number++)
|
|
{
|
|
struct grub_reiserfs_directory_header *directory_header
|
|
= &directory_headers[entry_number];
|
|
grub_uint16_t entry_state
|
|
= grub_le_to_cpu16 (directory_header->state);
|
|
grub_fshelp_node_t entry_item;
|
|
struct grub_reiserfs_key entry_key;
|
|
enum grub_fshelp_filetype entry_type;
|
|
char *entry_name;
|
|
|
|
if (!(entry_state & GRUB_REISERFS_VISIBLE_MASK))
|
|
continue;
|
|
|
|
entry_name = (((char *) directory_headers)
|
|
+ grub_le_to_cpu16 (directory_header->location));
|
|
entry_key.directory_id = directory_header->directory_id;
|
|
entry_key.object_id = directory_header->object_id;
|
|
entry_key.u.v2.offset_type = 0;
|
|
grub_reiserfs_set_key_type (&entry_key, GRUB_REISERFS_DIRECTORY,
|
|
2);
|
|
grub_reiserfs_set_key_offset (&entry_key, 1);
|
|
|
|
entry_item = grub_malloc (sizeof (*entry_item));
|
|
if (! entry_item)
|
|
goto fail;
|
|
|
|
if (grub_reiserfs_get_item (data, &entry_key, entry_item, 1)
|
|
!= GRUB_ERR_NONE)
|
|
{
|
|
grub_free (entry_item);
|
|
goto fail;
|
|
}
|
|
|
|
if (entry_item->type == GRUB_REISERFS_DIRECTORY)
|
|
entry_type = GRUB_FSHELP_DIR;
|
|
else
|
|
{
|
|
grub_uint32_t entry_block_number;
|
|
/* Order is very important here.
|
|
First set the offset to 0 using current key version.
|
|
Then change the key type, which affects key version
|
|
detection. */
|
|
grub_reiserfs_set_key_offset (&entry_key, 0);
|
|
grub_reiserfs_set_key_type (&entry_key, GRUB_REISERFS_STAT,
|
|
2);
|
|
if (grub_reiserfs_get_item (data, &entry_key, entry_item, 1)
|
|
!= GRUB_ERR_NONE)
|
|
{
|
|
grub_free (entry_item);
|
|
goto fail;
|
|
}
|
|
|
|
if (entry_item->block_number != 0)
|
|
{
|
|
grub_uint16_t entry_version;
|
|
entry_version
|
|
= grub_le_to_cpu16 (entry_item->header.version);
|
|
entry_block_number = entry_item->block_number;
|
|
#if 0
|
|
grub_dprintf ("reiserfs",
|
|
"version %04x block %08x (%08x) position %08x\n",
|
|
entry_version, entry_block_number,
|
|
((grub_disk_addr_t) entry_block_number * block_size) / GRUB_DISK_SECTOR_SIZE,
|
|
grub_le_to_cpu16 (entry_item->header.item_location));
|
|
#endif
|
|
if (entry_version == 0) /* Version 1 stat item. */
|
|
{
|
|
struct grub_reiserfs_stat_item_v1 entry_v1_stat;
|
|
grub_disk_read (data->disk,
|
|
entry_block_number * (block_size >> GRUB_DISK_SECTOR_BITS),
|
|
grub_le_to_cpu16 (entry_item->header.item_location),
|
|
sizeof (entry_v1_stat),
|
|
(char *) &entry_v1_stat);
|
|
if (grub_errno)
|
|
goto fail;
|
|
#if 0
|
|
grub_dprintf ("reiserfs",
|
|
"%04x %04x %04x %04x %08x %08x | %08x %08x %08x %08x\n",
|
|
grub_le_to_cpu16 (entry_v1_stat.mode),
|
|
grub_le_to_cpu16 (entry_v1_stat.hardlink_count),
|
|
grub_le_to_cpu16 (entry_v1_stat.uid),
|
|
grub_le_to_cpu16 (entry_v1_stat.gid),
|
|
grub_le_to_cpu32 (entry_v1_stat.size),
|
|
grub_le_to_cpu32 (entry_v1_stat.atime),
|
|
grub_le_to_cpu32 (entry_v1_stat.mtime),
|
|
grub_le_to_cpu32 (entry_v1_stat.ctime),
|
|
grub_le_to_cpu32 (entry_v1_stat.rdev),
|
|
grub_le_to_cpu32 (entry_v1_stat.first_direct_byte));
|
|
grub_dprintf ("reiserfs",
|
|
"%04x %04x %04x %04x %08x %08x | %08x %08x %08x %08x\n",
|
|
entry_v1_stat.mode,
|
|
entry_v1_stat.hardlink_count,
|
|
entry_v1_stat.uid,
|
|
entry_v1_stat.gid,
|
|
entry_v1_stat.size,
|
|
entry_v1_stat.atime,
|
|
entry_v1_stat.mtime,
|
|
entry_v1_stat.ctime,
|
|
entry_v1_stat.rdev,
|
|
entry_v1_stat.first_direct_byte);
|
|
#endif
|
|
entry_item->mtime = grub_le_to_cpu32 (entry_v1_stat.mtime);
|
|
if ((grub_le_to_cpu16 (entry_v1_stat.mode) & S_IFLNK)
|
|
== S_IFLNK)
|
|
entry_type = GRUB_FSHELP_SYMLINK;
|
|
else
|
|
entry_type = GRUB_FSHELP_REG;
|
|
entry_item->size = (grub_off_t) grub_le_to_cpu32 (entry_v1_stat.size);
|
|
}
|
|
else
|
|
{
|
|
struct grub_reiserfs_stat_item_v2 entry_v2_stat;
|
|
grub_disk_read (data->disk,
|
|
entry_block_number * (block_size >> GRUB_DISK_SECTOR_BITS),
|
|
grub_le_to_cpu16 (entry_item->header.item_location),
|
|
sizeof (entry_v2_stat),
|
|
(char *) &entry_v2_stat);
|
|
if (grub_errno)
|
|
goto fail;
|
|
#if 0
|
|
grub_dprintf ("reiserfs",
|
|
"%04x %04x %08x %08x%08x | %08x %08x %08x %08x | %08x %08x %08x\n",
|
|
grub_le_to_cpu16 (entry_v2_stat.mode),
|
|
grub_le_to_cpu16 (entry_v2_stat.reserved),
|
|
grub_le_to_cpu32 (entry_v2_stat.hardlink_count),
|
|
(unsigned int) (grub_le_to_cpu64 (entry_v2_stat.size) >> 32),
|
|
(unsigned int) (grub_le_to_cpu64 (entry_v2_stat.size) && 0xFFFFFFFF),
|
|
grub_le_to_cpu32 (entry_v2_stat.uid),
|
|
grub_le_to_cpu32 (entry_v2_stat.gid),
|
|
grub_le_to_cpu32 (entry_v2_stat.atime),
|
|
grub_le_to_cpu32 (entry_v2_stat.mtime),
|
|
grub_le_to_cpu32 (entry_v2_stat.ctime),
|
|
grub_le_to_cpu32 (entry_v2_stat.blocks),
|
|
grub_le_to_cpu32 (entry_v2_stat.first_direct_byte));
|
|
grub_dprintf ("reiserfs",
|
|
"%04x %04x %08x %08x%08x | %08x %08x %08x %08x | %08x %08x %08x\n",
|
|
entry_v2_stat.mode,
|
|
entry_v2_stat.reserved,
|
|
entry_v2_stat.hardlink_count,
|
|
(unsigned int) (entry_v2_stat.size >> 32),
|
|
(unsigned int) (entry_v2_stat.size && 0xFFFFFFFF),
|
|
entry_v2_stat.uid,
|
|
entry_v2_stat.gid,
|
|
entry_v2_stat.atime,
|
|
entry_v2_stat.mtime,
|
|
entry_v2_stat.ctime,
|
|
entry_v2_stat.blocks,
|
|
entry_v2_stat.first_direct_byte);
|
|
#endif
|
|
entry_item->mtime = grub_le_to_cpu32 (entry_v2_stat.mtime);
|
|
entry_item->size = (grub_off_t) grub_le_to_cpu64 (entry_v2_stat.size);
|
|
if ((grub_le_to_cpu16 (entry_v2_stat.mode) & S_IFLNK)
|
|
== S_IFLNK)
|
|
entry_type = GRUB_FSHELP_SYMLINK;
|
|
else
|
|
entry_type = GRUB_FSHELP_REG;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Pseudo file ".." never has stat block. */
|
|
if (grub_strcmp (entry_name, ".."))
|
|
grub_dprintf ("reiserfs",
|
|
"Warning : %s has no stat block !\n",
|
|
entry_name);
|
|
grub_free (entry_item);
|
|
goto next;
|
|
}
|
|
}
|
|
if (hook (entry_name, entry_type, entry_item, hook_data))
|
|
{
|
|
grub_dprintf ("reiserfs", "Found : %s, type=%d\n",
|
|
entry_name, entry_type);
|
|
ret = 1;
|
|
goto found;
|
|
}
|
|
|
|
next:
|
|
*entry_name = 0; /* Make sure next entry name (which is just
|
|
before this one in disk order) stops before
|
|
the current one. */
|
|
}
|
|
|
|
if (next_offset == 0)
|
|
break;
|
|
|
|
grub_reiserfs_set_key_offset (&(item_headers[block_position].key),
|
|
next_offset);
|
|
if (grub_reiserfs_get_item (data, &(item_headers[block_position].key),
|
|
&directory_item, 1) != GRUB_ERR_NONE)
|
|
goto fail;
|
|
block_number = directory_item.block_number;
|
|
block_position = directory_item.block_position;
|
|
next_offset = directory_item.next_offset;
|
|
}
|
|
while (block_number);
|
|
|
|
found:
|
|
assert (grub_errno == GRUB_ERR_NONE);
|
|
grub_free (block_header);
|
|
return ret;
|
|
fail:
|
|
assert (grub_errno != GRUB_ERR_NONE);
|
|
grub_free (block_header);
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* grub api functions */
|
|
/****************************************************************************/
|
|
|
|
/* Open a file named NAME and initialize FILE. */
|
|
static grub_err_t
|
|
grub_reiserfs_open (struct grub_file *file, const char *name)
|
|
{
|
|
struct grub_reiserfs_data *data = 0;
|
|
struct grub_fshelp_node root, *found = 0;
|
|
struct grub_reiserfs_key key;
|
|
|
|
grub_dl_ref (my_mod);
|
|
data = grub_reiserfs_mount (file->device->disk);
|
|
if (! data)
|
|
goto fail;
|
|
key.directory_id = grub_cpu_to_le32 (1);
|
|
key.object_id = grub_cpu_to_le32 (2);
|
|
key.u.v2.offset_type = 0;
|
|
grub_reiserfs_set_key_type (&key, GRUB_REISERFS_DIRECTORY, 2);
|
|
grub_reiserfs_set_key_offset (&key, 1);
|
|
if (grub_reiserfs_get_item (data, &key, &root, 1) != GRUB_ERR_NONE)
|
|
goto fail;
|
|
if (root.block_number == 0)
|
|
{
|
|
grub_error (GRUB_ERR_BAD_FS, "unable to find root item");
|
|
goto fail; /* Should never happen since checked at mount. */
|
|
}
|
|
grub_fshelp_find_file (name, &root, &found,
|
|
grub_reiserfs_iterate_dir,
|
|
grub_reiserfs_read_symlink, GRUB_FSHELP_REG);
|
|
if (grub_errno)
|
|
goto fail;
|
|
file->size = found->size;
|
|
|
|
grub_dprintf ("reiserfs", "file size : %d (%08x%08x)\n",
|
|
(unsigned int) file->size,
|
|
(unsigned int) (file->size >> 32), (unsigned int) file->size);
|
|
file->offset = 0;
|
|
file->data = found;
|
|
return GRUB_ERR_NONE;
|
|
|
|
fail:
|
|
assert (grub_errno != GRUB_ERR_NONE);
|
|
if (found != &root)
|
|
grub_free (found);
|
|
grub_free (data);
|
|
grub_dl_unref (my_mod);
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_ssize_t
|
|
grub_reiserfs_read_real (struct grub_fshelp_node *node,
|
|
grub_off_t off, char *buf, grub_size_t len,
|
|
grub_disk_read_hook_t read_hook, void *read_hook_data)
|
|
{
|
|
unsigned int indirect_block, indirect_block_count;
|
|
struct grub_reiserfs_key key;
|
|
struct grub_reiserfs_data *data = node->data;
|
|
struct grub_fshelp_node found;
|
|
grub_uint16_t block_size = grub_le_to_cpu16 (data->superblock.block_size);
|
|
grub_uint16_t item_size;
|
|
grub_uint32_t *indirect_block_ptr = 0;
|
|
grub_uint64_t current_key_offset = 1;
|
|
grub_off_t initial_position, current_position, final_position, length;
|
|
grub_disk_addr_t block;
|
|
grub_off_t offset;
|
|
|
|
key.directory_id = node->header.key.directory_id;
|
|
key.object_id = node->header.key.object_id;
|
|
key.u.v2.offset_type = 0;
|
|
grub_reiserfs_set_key_type (&key, GRUB_REISERFS_ANY, 2);
|
|
initial_position = off;
|
|
current_position = 0;
|
|
final_position = MIN (len + initial_position, node->size);
|
|
grub_dprintf ("reiserfs",
|
|
"Reading from %lld to %lld (%lld instead of requested %ld)\n",
|
|
(unsigned long long) initial_position,
|
|
(unsigned long long) final_position,
|
|
(unsigned long long) (final_position - initial_position),
|
|
(unsigned long) len);
|
|
|
|
grub_reiserfs_set_key_offset (&key, initial_position + 1);
|
|
|
|
if (grub_reiserfs_get_item (data, &key, &found, 0) != GRUB_ERR_NONE)
|
|
goto fail;
|
|
|
|
if (found.block_number == 0)
|
|
{
|
|
grub_error (GRUB_ERR_READ_ERROR, "offset %lld not found",
|
|
(unsigned long long) initial_position);
|
|
goto fail;
|
|
}
|
|
|
|
current_key_offset = grub_reiserfs_get_key_offset (&found.header.key);
|
|
current_position = current_key_offset - 1;
|
|
|
|
while (current_position < final_position)
|
|
{
|
|
grub_reiserfs_set_key_offset (&key, current_key_offset);
|
|
|
|
if (grub_reiserfs_get_item (data, &key, &found, 1) != GRUB_ERR_NONE)
|
|
goto fail;
|
|
if (found.block_number == 0)
|
|
goto fail;
|
|
item_size = grub_le_to_cpu16 (found.header.item_size);
|
|
switch (found.type)
|
|
{
|
|
case GRUB_REISERFS_DIRECT:
|
|
block = found.block_number * (block_size >> GRUB_DISK_SECTOR_BITS);
|
|
grub_dprintf ("reiserfs_blocktype", "D: %u\n", (unsigned) block);
|
|
if (initial_position < current_position + item_size)
|
|
{
|
|
offset = MAX ((signed) (initial_position - current_position), 0);
|
|
length = (MIN (item_size, final_position - current_position)
|
|
- offset);
|
|
grub_dprintf ("reiserfs",
|
|
"Reading direct block %u from %u to %u...\n",
|
|
(unsigned) block, (unsigned) offset,
|
|
(unsigned) (offset + length));
|
|
found.data->disk->read_hook = read_hook;
|
|
found.data->disk->read_hook_data = read_hook_data;
|
|
grub_disk_read (found.data->disk,
|
|
block,
|
|
offset
|
|
+ grub_le_to_cpu16 (found.header.item_location),
|
|
length, buf);
|
|
found.data->disk->read_hook = 0;
|
|
if (grub_errno)
|
|
goto fail;
|
|
buf += length;
|
|
current_position += offset + length;
|
|
}
|
|
else
|
|
current_position += item_size;
|
|
break;
|
|
case GRUB_REISERFS_INDIRECT:
|
|
indirect_block_count = item_size / sizeof (*indirect_block_ptr);
|
|
indirect_block_ptr = grub_malloc (item_size);
|
|
if (! indirect_block_ptr)
|
|
goto fail;
|
|
grub_disk_read (found.data->disk,
|
|
found.block_number * (block_size >> GRUB_DISK_SECTOR_BITS),
|
|
grub_le_to_cpu16 (found.header.item_location),
|
|
item_size, indirect_block_ptr);
|
|
if (grub_errno)
|
|
goto fail;
|
|
found.data->disk->read_hook = read_hook;
|
|
found.data->disk->read_hook_data = read_hook_data;
|
|
for (indirect_block = 0;
|
|
indirect_block < indirect_block_count
|
|
&& current_position < final_position;
|
|
indirect_block++)
|
|
{
|
|
block = grub_le_to_cpu32 (indirect_block_ptr[indirect_block]) *
|
|
(block_size >> GRUB_DISK_SECTOR_BITS);
|
|
grub_dprintf ("reiserfs_blocktype", "I: %u\n", (unsigned) block);
|
|
if (current_position + block_size >= initial_position)
|
|
{
|
|
offset = MAX ((signed) (initial_position - current_position),
|
|
0);
|
|
length = (MIN (block_size, final_position - current_position)
|
|
- offset);
|
|
grub_dprintf ("reiserfs",
|
|
"Reading indirect block %u from %u to %u...\n",
|
|
(unsigned) block, (unsigned) offset,
|
|
(unsigned) (offset + length));
|
|
#if 0
|
|
grub_dprintf ("reiserfs",
|
|
"\nib=%04d/%04d, ip=%d, cp=%d, fp=%d, off=%d, l=%d, tl=%d\n",
|
|
indirect_block + 1, indirect_block_count,
|
|
initial_position, current_position,
|
|
final_position, offset, length, len);
|
|
#endif
|
|
grub_disk_read (found.data->disk, block, offset, length, buf);
|
|
if (grub_errno)
|
|
goto fail;
|
|
buf += length;
|
|
current_position += offset + length;
|
|
}
|
|
else
|
|
current_position += block_size;
|
|
}
|
|
found.data->disk->read_hook = 0;
|
|
grub_free (indirect_block_ptr);
|
|
indirect_block_ptr = 0;
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
current_key_offset = current_position + 1;
|
|
}
|
|
|
|
grub_dprintf ("reiserfs",
|
|
"Have successfully read %lld bytes (%ld requested)\n",
|
|
(unsigned long long) (current_position - initial_position),
|
|
(unsigned long) len);
|
|
return current_position - initial_position;
|
|
|
|
#if 0
|
|
switch (found.type)
|
|
{
|
|
case GRUB_REISERFS_DIRECT:
|
|
read_length = MIN (len, item_size - file->offset);
|
|
grub_disk_read (found.data->disk,
|
|
(found.block_number * block_size) / GRUB_DISK_SECTOR_SIZE,
|
|
grub_le_to_cpu16 (found.header.item_location) + file->offset,
|
|
read_length, buf);
|
|
if (grub_errno)
|
|
goto fail;
|
|
break;
|
|
case GRUB_REISERFS_INDIRECT:
|
|
indirect_block_count = item_size / sizeof (*indirect_block_ptr);
|
|
indirect_block_ptr = grub_malloc (item_size);
|
|
if (!indirect_block_ptr)
|
|
goto fail;
|
|
grub_disk_read (found.data->disk,
|
|
(found.block_number * block_size) / GRUB_DISK_SECTOR_SIZE,
|
|
grub_le_to_cpu16 (found.header.item_location),
|
|
item_size, (char *) indirect_block_ptr);
|
|
if (grub_errno)
|
|
goto fail;
|
|
len = MIN (len, file->size - file->offset);
|
|
for (indirect_block = file->offset / block_size;
|
|
indirect_block < indirect_block_count && read_length < len;
|
|
indirect_block++)
|
|
{
|
|
read = MIN (block_size, len - read_length);
|
|
grub_disk_read (found.data->disk,
|
|
(grub_le_to_cpu32 (indirect_block_ptr[indirect_block]) * block_size) / GRUB_DISK_SECTOR_SIZE,
|
|
file->offset % block_size, read,
|
|
((void *) buf) + read_length);
|
|
if (grub_errno)
|
|
goto fail;
|
|
read_length += read;
|
|
}
|
|
grub_free (indirect_block_ptr);
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
|
|
return read_length;
|
|
#endif
|
|
|
|
fail:
|
|
grub_free (indirect_block_ptr);
|
|
return -1;
|
|
}
|
|
|
|
static grub_ssize_t
|
|
grub_reiserfs_read (grub_file_t file, char *buf, grub_size_t len)
|
|
{
|
|
return grub_reiserfs_read_real (file->data, file->offset, buf, len,
|
|
file->read_hook, file->read_hook_data);
|
|
}
|
|
|
|
/* Close the file FILE. */
|
|
static grub_err_t
|
|
grub_reiserfs_close (grub_file_t file)
|
|
{
|
|
struct grub_fshelp_node *node = file->data;
|
|
struct grub_reiserfs_data *data = node->data;
|
|
|
|
grub_free (data);
|
|
grub_free (node);
|
|
grub_dl_unref (my_mod);
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
/* Context for grub_reiserfs_dir. */
|
|
struct grub_reiserfs_dir_ctx
|
|
{
|
|
grub_fs_dir_hook_t hook;
|
|
void *hook_data;
|
|
};
|
|
|
|
/* Helper for grub_reiserfs_dir. */
|
|
static int
|
|
grub_reiserfs_dir_iter (const char *filename,
|
|
enum grub_fshelp_filetype filetype,
|
|
grub_fshelp_node_t node, void *data)
|
|
{
|
|
struct grub_reiserfs_dir_ctx *ctx = data;
|
|
struct grub_dirhook_info info;
|
|
|
|
grub_memset (&info, 0, sizeof (info));
|
|
info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);
|
|
info.mtimeset = 1;
|
|
info.mtime = node->mtime;
|
|
grub_free (node);
|
|
return ctx->hook (filename, &info, ctx->hook_data);
|
|
}
|
|
|
|
/* Call HOOK with each file under DIR. */
|
|
static grub_err_t
|
|
grub_reiserfs_dir (grub_device_t device, const char *path,
|
|
grub_fs_dir_hook_t hook, void *hook_data)
|
|
{
|
|
struct grub_reiserfs_dir_ctx ctx = { hook, hook_data };
|
|
struct grub_reiserfs_data *data = 0;
|
|
struct grub_fshelp_node root, *found;
|
|
struct grub_reiserfs_key root_key;
|
|
|
|
grub_dl_ref (my_mod);
|
|
data = grub_reiserfs_mount (device->disk);
|
|
if (! data)
|
|
goto fail;
|
|
root_key.directory_id = grub_cpu_to_le32 (1);
|
|
root_key.object_id = grub_cpu_to_le32 (2);
|
|
root_key.u.v2.offset_type = 0;
|
|
grub_reiserfs_set_key_type (&root_key, GRUB_REISERFS_DIRECTORY, 2);
|
|
grub_reiserfs_set_key_offset (&root_key, 1);
|
|
if (grub_reiserfs_get_item (data, &root_key, &root, 1) != GRUB_ERR_NONE)
|
|
goto fail;
|
|
if (root.block_number == 0)
|
|
{
|
|
grub_error(GRUB_ERR_BAD_FS, "root not found");
|
|
goto fail;
|
|
}
|
|
grub_fshelp_find_file (path, &root, &found, grub_reiserfs_iterate_dir,
|
|
grub_reiserfs_read_symlink, GRUB_FSHELP_DIR);
|
|
if (grub_errno)
|
|
goto fail;
|
|
grub_reiserfs_iterate_dir (found, grub_reiserfs_dir_iter, &ctx);
|
|
grub_free (data);
|
|
grub_dl_unref (my_mod);
|
|
return GRUB_ERR_NONE;
|
|
|
|
fail:
|
|
grub_free (data);
|
|
grub_dl_unref (my_mod);
|
|
return grub_errno;
|
|
}
|
|
|
|
/* Return the label of the device DEVICE in LABEL. The label is
|
|
returned in a grub_malloc'ed buffer and should be freed by the
|
|
caller. */
|
|
static grub_err_t
|
|
grub_reiserfs_label (grub_device_t device, char **label)
|
|
{
|
|
struct grub_reiserfs_data *data;
|
|
grub_disk_t disk = device->disk;
|
|
|
|
grub_dl_ref (my_mod);
|
|
|
|
data = grub_reiserfs_mount (disk);
|
|
if (data)
|
|
{
|
|
*label = grub_strndup (data->superblock.label,
|
|
sizeof (data->superblock.label));
|
|
}
|
|
else
|
|
*label = NULL;
|
|
|
|
grub_dl_unref (my_mod);
|
|
|
|
grub_free (data);
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_reiserfs_uuid (grub_device_t device, char **uuid)
|
|
{
|
|
struct grub_reiserfs_data *data;
|
|
grub_disk_t disk = device->disk;
|
|
|
|
grub_dl_ref (my_mod);
|
|
|
|
*uuid = NULL;
|
|
data = grub_reiserfs_mount (disk);
|
|
if (data)
|
|
{
|
|
unsigned i;
|
|
for (i = 0; i < ARRAY_SIZE (data->superblock.uuid); i++)
|
|
if (data->superblock.uuid[i])
|
|
break;
|
|
if (i < ARRAY_SIZE (data->superblock.uuid))
|
|
*uuid = grub_xasprintf ("%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
|
|
grub_be_to_cpu16 (data->superblock.uuid[0]),
|
|
grub_be_to_cpu16 (data->superblock.uuid[1]),
|
|
grub_be_to_cpu16 (data->superblock.uuid[2]),
|
|
grub_be_to_cpu16 (data->superblock.uuid[3]),
|
|
grub_be_to_cpu16 (data->superblock.uuid[4]),
|
|
grub_be_to_cpu16 (data->superblock.uuid[5]),
|
|
grub_be_to_cpu16 (data->superblock.uuid[6]),
|
|
grub_be_to_cpu16 (data->superblock.uuid[7]));
|
|
}
|
|
|
|
grub_dl_unref (my_mod);
|
|
|
|
grub_free (data);
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static struct grub_fs grub_reiserfs_fs =
|
|
{
|
|
.name = "reiserfs",
|
|
.dir = grub_reiserfs_dir,
|
|
.open = grub_reiserfs_open,
|
|
.read = grub_reiserfs_read,
|
|
.close = grub_reiserfs_close,
|
|
.label = grub_reiserfs_label,
|
|
.uuid = grub_reiserfs_uuid,
|
|
#ifdef GRUB_UTIL
|
|
.reserved_first_sector = 1,
|
|
.blocklist_install = 1,
|
|
#endif
|
|
.next = 0
|
|
};
|
|
|
|
GRUB_MOD_INIT(reiserfs)
|
|
{
|
|
grub_fs_register (&grub_reiserfs_fs);
|
|
my_mod = mod;
|
|
}
|
|
|
|
GRUB_MOD_FINI(reiserfs)
|
|
{
|
|
grub_fs_unregister (&grub_reiserfs_fs);
|
|
}
|