/* * Copyright (c) 2012 Frantisek Princ * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup libext4 * @{ */ #ifndef LIBEXT4_LIBEXT4_SUPERBLOCK_H_ #define LIBEXT4_LIBEXT4_SUPERBLOCK_H_ #include #include #include "libext4_types.h" extern uint32_t ext4_superblock_get_inodes_count(ext4_superblock_t *); extern void ext4_superblock_set_inodes_count(ext4_superblock_t *, uint32_t); extern uint64_t ext4_superblock_get_blocks_count(ext4_superblock_t *); extern void ext4_superblock_set_blocks_count(ext4_superblock_t *, uint64_t); extern uint64_t ext4_superblock_get_reserved_blocks_count(ext4_superblock_t *); extern void ext4_superblock_set_reserved_blocks_count(ext4_superblock_t *, uint64_t); extern uint64_t ext4_superblock_get_free_blocks_count(ext4_superblock_t *); extern void ext4_superblock_set_free_blocks_count(ext4_superblock_t *, uint64_t); extern uint32_t ext4_superblock_get_free_inodes_count(ext4_superblock_t *); extern void ext4_superblock_set_free_inodes_count(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_first_data_block(ext4_superblock_t *); extern void ext4_superblock_set_first_data_block(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_log_block_size(ext4_superblock_t *); extern void ext4_superblock_set_log_block_size(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_block_size(ext4_superblock_t *); extern void ext4_superblock_set_block_size(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_blocks_per_group(ext4_superblock_t *); extern void ext4_superblock_set_blocks_per_group(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_inodes_per_group(ext4_superblock_t *); extern void ext4_superblock_set_inodes_per_group(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_mount_time(ext4_superblock_t *); extern void ext4_superblock_set_mount_time(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_write_time(ext4_superblock_t *); extern void ext4_superblock_set_write_time(ext4_superblock_t *, uint32_t); extern uint16_t ext4_superblock_get_mount_count(ext4_superblock_t *); extern void ext4_superblock_set_mount_count(ext4_superblock_t *, uint16_t); extern uint16_t ext4_superblock_get_max_mount_count(ext4_superblock_t *); extern void ext4_superblock_set_max_mount_count(ext4_superblock_t *, uint16_t); extern uint16_t ext4_superblock_get_magic(ext4_superblock_t *); extern uint16_t ext4_superblock_get_state(ext4_superblock_t *); extern void ext4_superblock_set_state(ext4_superblock_t *, uint16_t); extern uint16_t ext4_superblock_get_errors(ext4_superblock_t *); extern void ext4_superblock_set_errors(ext4_superblock_t *, uint16_t); extern uint16_t ext4_superblock_get_minor_rev_level(ext4_superblock_t *); extern void ext4_superblock_set_minor_rev_level(ext4_superblock_t *, uint16_t); extern uint32_t ext4_superblock_get_last_check_time(ext4_superblock_t *); extern void ext4_superblock_set_last_check_time(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_check_interval(ext4_superblock_t *); extern void ext4_superblock_set_check_interval(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_creator_os(ext4_superblock_t *); extern void ext4_superblock_set_creator_os(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_rev_level(ext4_superblock_t *); extern void ext4_superblock_set_rev_level(ext4_superblock_t *, uint32_t); extern uint16_t ext4_superblock_get_def_resuid(ext4_superblock_t *); extern void ext4_superblock_set_def_resuid(ext4_superblock_t *, uint16_t); extern uint16_t ext4_superblock_get_def_resgid(ext4_superblock_t *); extern void ext4_superblock_set_def_resgid(ext4_superblock_t *, uint16_t); extern uint32_t ext4_superblock_get_first_inode(ext4_superblock_t *); extern void ext4_superblock_set_first_inode(ext4_superblock_t *, uint32_t); extern uint16_t ext4_superblock_get_inode_size(ext4_superblock_t *); extern void ext4_superblock_set_inode_size(ext4_superblock_t *, uint16_t); extern uint16_t ext4_superblock_get_block_group_number(ext4_superblock_t *); extern void ext4_superblock_set_block_group_number(ext4_superblock_t *, uint16_t); extern uint32_t ext4_superblock_get_features_compatible(ext4_superblock_t *); extern void ext4_superblock_set_features_compatible(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_features_incompatible(ext4_superblock_t *); extern void ext4_superblock_set_features_incompatible(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_features_read_only(ext4_superblock_t *); extern void ext4_superblock_set_features_read_only(ext4_superblock_t *, uint32_t); /* uint8_t s_uuid[16]; // 128-bit uuid for volume char volume_name[16]; // Volume name char last_mounted[64]; // Directory where last mounted uint32_t s_algorithm_usage_bitmap; // For compression uint8_t s_prealloc_blocks; // Number of blocks to try to preallocate uint8_t s_prealloc_dir_blocks; // Number to preallocate for dirs uint16_t s_reserved_gdt_blocks; // Per group desc for online growth uint8_t s_journal_uuid[16]; // UUID of journal superblock uint32_t s_journal_inum; // Inode number of journal file uint32_t s_journal_dev; // Device number of journal file */ extern uint32_t ext4_superblock_get_last_orphan(ext4_superblock_t *); extern void ext4_superblock_set_last_orphan(ext4_superblock_t *, uint32_t); extern uint32_t* ext4_superblock_get_hash_seed(ext4_superblock_t *); extern uint8_t ext4_superblock_get_default_hash_version(ext4_superblock_t *); extern void ext4_superblock_set_default_hash_version(ext4_superblock_t *, uint8_t); /* uint8_t s_jnl_backup_type; */ extern uint16_t ext4_superblock_get_desc_size(ext4_superblock_t *); extern void ext4_superblock_set_desc_size(ext4_superblock_t *, uint16_t); /* uint32_t s_default_mount_opts; // Default mount options uint32_t s_first_meta_bg; // First metablock block group uint32_t s_mkfs_time; // When the filesystem was created uint32_t s_jnl_blocks[17]; // Backup of the journal inode uint16_t s_min_extra_isize; // All inodes have at least # bytes uint16_t s_want_extra_isize; // New inodes should reserve # bytes */ extern uint32_t ext4_superblock_get_flags(ext4_superblock_t *); extern void ext4_superblock_set_flags(ext4_superblock_t *, uint32_t); /* uint16_t s_raid_stride; // RAID stride uint16_t s_mmp_interval; // # seconds to wait in MMP checking uint64_t s_mmp_block; // Block for multi-mount protection uint32_t s_raid_stripe_width; // blocks on all data disks (N*stride) uint8_t s_log_groups_per_flex; // FLEX_BG group size uint8_t s_reserved_char_pad; uint16_t s_reserved_pad; uint64_t s_kbytes_written; // Number of lifetime kilobytes written uint32_t s_snapshot_inum; // Inode number of active snapshot uint32_t s_snapshot_id; // Sequential ID of active snapshot uint64_t s_snapshot_r_blocks_count; // reserved blocks for active snapshot's future use uint32_t s_snapshot_list; // inode number of the head of the on-disk snapshot list uint32_t s_error_count; // number of fs errors uint32_t s_first_error_time; // First time an error happened uint32_t s_first_error_ino; // Inode involved in first error uint64_t s_first_error_block; // block involved of first error uint8_t s_first_error_func[32]; // Function where the error happened uint32_t s_first_error_line; // Line number where error happened uint32_t s_last_error_time; // Most recent time of an error uint32_t s_last_error_ino; // Inode involved in last error uint32_t s_last_error_line; // Line number where error happened uint64_t s_last_error_block; // block involved of last error uint8_t s_last_error_func[32]; // function where the error happened uint8_t s_mount_opts[64]; */ /* More complex superblock functions */ extern bool ext4_superblock_has_flag(ext4_superblock_t *, uint32_t); extern bool ext4_superblock_has_feature_compatible(ext4_superblock_t *, uint32_t); extern bool ext4_superblock_has_feature_incompatible(ext4_superblock_t *, uint32_t); extern bool ext4_superblock_has_feature_read_only(ext4_superblock_t *, uint32_t); extern int ext4_superblock_read_direct(service_id_t, ext4_superblock_t **); extern int ext4_superblock_write_direct(service_id_t, ext4_superblock_t *); extern int ext4_superblock_check_sanity(ext4_superblock_t *); extern uint32_t ext4_superblock_get_block_group_count(ext4_superblock_t *); extern uint32_t ext4_superblock_get_blocks_in_group(ext4_superblock_t *, uint32_t); extern uint32_t ext4_superblock_get_inodes_in_group(ext4_superblock_t *, uint32_t); #endif /** * @} */