#include <stdint.h>
-
/*
* Structure of the super block
*/
struct ext4_sblock {
- uint32_t inodes_count; /* I-nodes count */
- uint32_t blocks_count_lo; /* Blocks count */
- uint32_t reserved_blocks_count_lo; /* Reserved blocks count */
- uint32_t free_blocks_count_lo; /* Free blocks count */
- uint32_t free_inodes_count; /* Free inodes count */
- uint32_t first_data_block; /* First Data Block */
- uint32_t log_block_size; /* Block size */
- uint32_t log_frag_size; /* Obsoleted fragment size */
- uint32_t blocks_per_group; /* Number of blocks per group */
- uint32_t frags_per_group; /* Obsoleted fragments per group */
- uint32_t inodes_per_group; /* Number of inodes per group */
- uint32_t mount_time; /* Mount time */
- uint32_t write_time; /* Write time */
- uint16_t mount_count; /* Mount count */
- uint16_t max_mount_count; /* Maximal mount count */
- uint16_t magic; /* Magic signature */
- uint16_t state; /* File system state */
- uint16_t errors; /* Behaviour when detecting errors */
- uint16_t minor_rev_level; /* Minor revision level */
- uint32_t last_check_time; /* Time of last check */
- uint32_t check_interval; /* Maximum time between checks */
- uint32_t creator_os; /* Creator OS */
- uint32_t rev_level; /* Revision level */
- uint16_t def_resuid; /* Default uid for reserved blocks */
- uint16_t def_resgid; /* Default gid for reserved blocks */
+ uint32_t inodes_count; /* I-nodes count */
+ uint32_t blocks_count_lo; /* Blocks count */
+ uint32_t reserved_blocks_count_lo; /* Reserved blocks count */
+ uint32_t free_blocks_count_lo; /* Free blocks count */
+ uint32_t free_inodes_count; /* Free inodes count */
+ uint32_t first_data_block; /* First Data Block */
+ uint32_t log_block_size; /* Block size */
+ uint32_t log_cluster_size; /* Obsoleted fragment size */
+ uint32_t blocks_per_group; /* Number of blocks per group */
+ uint32_t frags_per_group; /* Obsoleted fragments per group */
+ uint32_t inodes_per_group; /* Number of inodes per group */
+ uint32_t mount_time; /* Mount time */
+ uint32_t write_time; /* Write time */
+ uint16_t mount_count; /* Mount count */
+ uint16_t max_mount_count; /* Maximal mount count */
+ uint16_t magic; /* Magic signature */
+ uint16_t state; /* File system state */
+ uint16_t errors; /* Behaviour when detecting errors */
+ uint16_t minor_rev_level; /* Minor revision level */
+ uint32_t last_check_time; /* Time of last check */
+ uint32_t check_interval; /* Maximum time between checks */
+ uint32_t creator_os; /* Creator OS */
+ uint32_t rev_level; /* Revision level */
+ uint16_t def_resuid; /* Default uid for reserved blocks */
+ uint16_t def_resgid; /* Default gid for reserved blocks */
/* Fields for EXT4_DYNAMIC_REV superblocks only. */
- uint32_t first_inode; /* First non-reserved inode */
- uint16_t inode_size; /* Size of inode structure */
- uint16_t block_group_index; /* Block group index of this superblock */
- uint32_t features_compatible; /* Compatible feature set */
- uint32_t features_incompatible; /* Incompatible feature set */
- uint32_t features_read_only; /* Readonly-compatible feature set */
- uint8_t uuid[16]; /* 128-bit uuid for volume */
- char volume_name[16]; /* Volume name */
- char last_mounted[64]; /* Directory where last mounted */
- uint32_t algorithm_usage_bitmap; /* For compression */
+ uint32_t first_inode; /* First non-reserved inode */
+ uint16_t inode_size; /* Size of inode structure */
+ uint16_t block_group_index; /* Block group index of this superblock */
+ uint32_t features_compatible; /* Compatible feature set */
+ uint32_t features_incompatible; /* Incompatible feature set */
+ uint32_t features_read_only; /* Readonly-compatible feature set */
+ uint8_t uuid[16]; /* 128-bit uuid for volume */
+ char volume_name[16]; /* Volume name */
+ char last_mounted[64]; /* Directory where last mounted */
+ uint32_t algorithm_usage_bitmap; /* For compression */
/*
* Performance hints. Directory preallocation should only
* happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
*/
- 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_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 */
/*
* Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
*/
- uint8_t journal_uuid[16]; /* UUID of journal superblock */
- uint32_t journal_inode_number; /* Inode number of journal file */
- uint32_t journal_dev; /* Device number of journal file */
- uint32_t last_orphan; /* Head of list of inodes to delete */
- uint32_t hash_seed[4]; /* HTREE hash seed */
- uint8_t default_hash_version; /* Default hash version to use */
+ uint8_t journal_uuid[16]; /* UUID of journal superblock */
+ uint32_t journal_inode_number; /* Inode number of journal file */
+ uint32_t journal_dev; /* Device number of journal file */
+ uint32_t last_orphan; /* Head of list of inodes to delete */
+ uint32_t hash_seed[4]; /* HTREE hash seed */
+ uint8_t default_hash_version; /* Default hash version to use */
uint8_t journal_backup_type;
- uint16_t desc_size; /* Size of group descriptor */
- uint32_t default_mount_opts; /* Default mount options */
- uint32_t first_meta_bg; /* First metablock block group */
- uint32_t mkfs_time; /* When the filesystem was created */
- uint32_t journal_blocks[17]; /* Backup of the journal inode */
+ uint16_t desc_size; /* Size of group descriptor */
+ uint32_t default_mount_opts; /* Default mount options */
+ uint32_t first_meta_bg; /* First metablock block group */
+ uint32_t mkfs_time; /* When the filesystem was created */
+ uint32_t journal_blocks[17]; /* Backup of the journal inode */
/* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
- uint32_t blocks_count_hi; /* Blocks count */
- uint32_t reserved_blocks_count_hi; /* Reserved blocks count */
- uint32_t free_blocks_count_hi; /* Free blocks count */
- uint16_t min_extra_isize; /* All inodes have at least # bytes */
- uint16_t want_extra_isize; /* New inodes should reserve # bytes */
- uint32_t flags; /* Miscellaneous flags */
- uint16_t raid_stride; /* RAID stride */
- uint16_t mmp_interval; /* # seconds to wait in MMP checking */
- uint64_t mmp_block; /* Block for multi-mount protection */
- uint32_t raid_stripe_width; /* Blocks on all data disks (N * stride) */
- uint8_t log_groups_per_flex; /* FLEX_BG group size */
+ uint32_t blocks_count_hi; /* Blocks count */
+ uint32_t reserved_blocks_count_hi; /* Reserved blocks count */
+ uint32_t free_blocks_count_hi; /* Free blocks count */
+ uint16_t min_extra_isize; /* All inodes have at least # bytes */
+ uint16_t want_extra_isize; /* New inodes should reserve # bytes */
+ uint32_t flags; /* Miscellaneous flags */
+ uint16_t raid_stride; /* RAID stride */
+ uint16_t mmp_interval; /* # seconds to wait in MMP checking */
+ uint64_t mmp_block; /* Block for multi-mount protection */
+ uint32_t raid_stripe_width; /* Blocks on all data disks (N * stride) */
+ uint8_t log_groups_per_flex; /* FLEX_BG group size */
uint8_t reserved_char_pad;
uint16_t reserved_pad;
- uint64_t kbytes_written; /* Number of lifetime kilobytes written */
- uint32_t snapshot_inum; /* I-node number of active snapshot */
- uint32_t snapshot_id; /* Sequential ID of active snapshot */
- uint64_t snapshot_r_blocks_count; /* Reserved blocks for active snapshot's future use */
- uint32_t snapshot_list; /* I-node number of the head of the on-disk snapshot list */
- uint32_t error_count; /* Number of file system errors */
- uint32_t first_error_time; /* First time an error happened */
- uint32_t first_error_ino; /* I-node involved in first error */
- uint64_t first_error_block; /* Block involved of first error */
- uint8_t first_error_func[32]; /* Function where the error happened */
- uint32_t first_error_line; /* Line number where error happened */
- uint32_t last_error_time; /* Most recent time of an error */
- uint32_t last_error_ino; /* I-node involved in last error */
- uint32_t last_error_line; /* Line number where error happened */
- uint64_t last_error_block; /* Block involved of last error */
- uint8_t last_error_func[32]; /* Function where the error happened */
+ uint64_t kbytes_written; /* Number of lifetime kilobytes written */
+ uint32_t snapshot_inum; /* I-node number of active snapshot */
+ uint32_t snapshot_id; /* Sequential ID of active snapshot */
+ uint64_t snapshot_r_blocks_count; /* Reserved blocks for active snapshot's
+ future use */
+ uint32_t snapshot_list; /* I-node number of the head of the on-disk snapshot
+ list */
+ uint32_t error_count; /* Number of file system errors */
+ uint32_t first_error_time; /* First time an error happened */
+ uint32_t first_error_ino; /* I-node involved in first error */
+ uint64_t first_error_block; /* Block involved of first error */
+ uint8_t first_error_func[32]; /* Function where the error happened */
+ uint32_t first_error_line; /* Line number where error happened */
+ uint32_t last_error_time; /* Most recent time of an error */
+ uint32_t last_error_ino; /* I-node involved in last error */
+ uint32_t last_error_line; /* Line number where error happened */
+ uint64_t last_error_block; /* Block involved of last error */
+ uint8_t last_error_func[32]; /* Function where the error happened */
uint8_t mount_opts[64];
- uint32_t padding[112]; /* Padding to the end of the block */
+ uint32_t padding[112]; /* Padding to the end of the block */
} __attribute__((packed));
+#define EXT4_SUPERBLOCK_MAGIC 0xEF53
+#define EXT4_SUPERBLOCK_SIZE 1024
+#define EXT4_SUPERBLOCK_OFFSET 1024
-#define EXT4_SUPERBLOCK_MAGIC 0xEF53
-#define EXT4_SUPERBLOCK_SIZE 1024
-#define EXT4_SUPERBLOCK_OFFSET 1024
-
-#define EXT4_SUPERBLOCK_OS_LINUX 0
-#define EXT4_SUPERBLOCK_OS_HURD 1
+#define EXT4_SUPERBLOCK_OS_LINUX 0
+#define EXT4_SUPERBLOCK_OS_HURD 1
/*
* Misc. filesystem flags
*/
-#define EXT4_SUPERBLOCK_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */
-#define EXT4_SUPERBLOCK_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */
-#define EXT4_SUPERBLOCK_FLAGS_TEST_FILESYS 0x0004 /* to test development code */
-
+#define EXT4_SUPERBLOCK_FLAGS_SIGNED_HASH 0x0001
+#define EXT4_SUPERBLOCK_FLAGS_UNSIGNED_HASH 0x0002
+#define EXT4_SUPERBLOCK_FLAGS_TEST_FILESYS 0x0004
/*
* Filesystem states
*/
-#define EXT4_SUPERBLOCK_STATE_VALID_FS 0x0001 /* Unmounted cleanly */
-#define EXT4_SUPERBLOCK_STATE_ERROR_FS 0x0002 /* Errors detected */
-#define EXT4_SUPERBLOCK_STATE_ORPHAN_FS 0x0004 /* Orphans being recovered */
+#define EXT4_SUPERBLOCK_STATE_VALID_FS 0x0001 /* Unmounted cleanly */
+#define EXT4_SUPERBLOCK_STATE_ERROR_FS 0x0002 /* Errors detected */
+#define EXT4_SUPERBLOCK_STATE_ORPHAN_FS 0x0004 /* Orphans being recovered */
/*
* Behaviour when errors detected
*/
-#define EXT4_SUPERBLOCK_ERRORS_CONTINUE 1 /* Continue execution */
-#define EXT4_SUPERBLOCK_ERRORS_RO 2 /* Remount fs read-only */
-#define EXT4_SUPERBLOCK_ERRORS_PANIC 3 /* Panic */
-#define EXT4_SUPERBLOCK_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
+#define EXT4_SUPERBLOCK_ERRORS_CONTINUE 1 /* Continue execution */
+#define EXT4_SUPERBLOCK_ERRORS_RO 2 /* Remount fs read-only */
+#define EXT4_SUPERBLOCK_ERRORS_PANIC 3 /* Panic */
+#define EXT4_SUPERBLOCK_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
/*
* Compatible features
*/
-#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
-#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
-#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
-#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
-#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
-#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
-
+#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
+#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
+#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
+#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
+#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
+#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
/*
* Read-only compatible features
*/
-#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
-#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
-#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
-#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
-#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
-#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
-#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
-#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
-#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
+#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
+#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
+#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
+#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
+#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
+#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
+#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
+#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
+#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
/*
* Incompatible features
*/
-#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
-#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
-#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
-#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
-#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
-#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
-#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
-#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
-#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
-#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */
-#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */
-#define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000 /* use crc32c for bg */
-#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */
-#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
-
+#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
+#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
+#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
+#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
+#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
+#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
+#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
+#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
+#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
+#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */
+#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */
+#define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000 /* use crc32c for bg */
+#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */
+#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
/*
* EXT2 supported feature set
*/
-#define EXT2_FEATURE_COMPAT_SUPP 0x0000
+#define EXT2_FEATURE_COMPAT_SUPP 0x0000
-#define EXT2_FEATURE_INCOMPAT_SUPP \
- (EXT4_FEATURE_INCOMPAT_FILETYPE | \
- EXT4_FEATURE_INCOMPAT_META_BG)
+#define EXT2_FEATURE_INCOMPAT_SUPP \
+ (EXT4_FEATURE_INCOMPAT_FILETYPE | EXT4_FEATURE_INCOMPAT_META_BG)
-#define EXT2_FEATURE_RO_COMPAT_SUPP \
- (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
- EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
+#define EXT2_FEATURE_RO_COMPAT_SUPP \
+ (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
+ EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
/*
* EXT3 supported feature set
*/
-#define EXT3_FEATURE_COMPAT_SUPP \
- (EXT4_FEATURE_COMPAT_DIR_INDEX)
+#define EXT3_FEATURE_COMPAT_SUPP (EXT4_FEATURE_COMPAT_DIR_INDEX)
-#define EXT3_FEATURE_INCOMPAT_SUPP \
- (EXT4_FEATURE_INCOMPAT_FILETYPE | \
- EXT4_FEATURE_INCOMPAT_META_BG)
+#define EXT3_FEATURE_INCOMPAT_SUPP \
+ (EXT4_FEATURE_INCOMPAT_FILETYPE | EXT4_FEATURE_INCOMPAT_META_BG)
-#define EXT3_FEATURE_RO_COMPAT_SUPP \
- (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
- EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
+#define EXT3_FEATURE_RO_COMPAT_SUPP \
+ (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
+ EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
/*
* EXT4 supported feature set
*/
-#define EXT4_FEATURE_COMPAT_SUPP \
- (EXT4_FEATURE_COMPAT_DIR_INDEX)
-
-#define EXT4_FEATURE_INCOMPAT_SUPP \
- (EXT4_FEATURE_INCOMPAT_FILETYPE | \
- EXT4_FEATURE_INCOMPAT_META_BG | \
- EXT4_FEATURE_INCOMPAT_EXTENTS | \
- EXT4_FEATURE_INCOMPAT_64BIT)
+#define EXT4_FEATURE_COMPAT_SUPP (EXT4_FEATURE_COMPAT_DIR_INDEX)
-#define EXT4_FEATURE_RO_COMPAT_SUPP \
- (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
- EXT4_FEATURE_RO_COMPAT_GDT_CSUM | \
- EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
- EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
- EXT4_FEATURE_RO_COMPAT_BTREE_DIR | \
- EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
+#define EXT4_FEATURE_INCOMPAT_SUPP \
+ (EXT4_FEATURE_INCOMPAT_FILETYPE | EXT4_FEATURE_INCOMPAT_META_BG | \
+ EXT4_FEATURE_INCOMPAT_EXTENTS | EXT4_FEATURE_INCOMPAT_FLEX_BG | \
+ EXT4_FEATURE_INCOMPAT_64BIT)
+#define EXT4_FEATURE_RO_COMPAT_SUPP \
+ (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM | EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
+ EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | EXT4_FEATURE_RO_COMPAT_BTREE_DIR | \
+ EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
/*Ignored features:
* RECOVER - journaling in lwext4 is not supported
* (probably won,t be ever...)
* MMP - multi mout protection (impossible scenario)
* */
-#define FEATURE_INCOMPAT_IGNORED \
- EXT4_FEATURE_INCOMPAT_RECOVER | \
- EXT4_FEATURE_INCOMPAT_MMP)
+#define FEATURE_INCOMPAT_IGNORED \
+ EXT4_FEATURE_INCOMPAT_RECOVER | EXT4_FEATURE_INCOMPAT_MMP
#if 0
/*TODO: Features incompatible to implement*/
#define EXT4_FEATURE_INCOMPAT_SUPP
- EXT4_FEATURE_INCOMPAT_FLEX_BG| \
- EXT4_FEATURE_INCOMPAT_INLINE_DATA)
+ (EXT4_FEATURE_INCOMPAT_INLINE_DATA)
/*TODO: Features read only to implement*/
#define EXT4_FEATURE_RO_COMPAT_SUPP
#endif
struct ext4_fs {
- struct ext4_blockdev*bdev;
+ struct ext4_blockdev *bdev;
struct ext4_sblock sb;
uint64_t inode_block_limits[4];
uint32_t last_inode_bg_id;
};
-
-#define EXT4_BLOCK_GROUP_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */
-#define EXT4_BLOCK_GROUP_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */
-#define EXT4_BLOCK_GROUP_ITABLE_ZEROED 0x0004 /* On-disk itable initialized to zero */
+/* Inode table/bitmap not in use */
+#define EXT4_BLOCK_GROUP_INODE_UNINIT 0x0001
+/* Block bitmap not in use */
+#define EXT4_BLOCK_GROUP_BLOCK_UNINIT 0x0002
+/* On-disk itable initialized to zero */
+#define EXT4_BLOCK_GROUP_ITABLE_ZEROED 0x0004
/*
* Structure of a blocks group descriptor
*/
struct ext4_bgroup {
- uint32_t block_bitmap_lo; /* Blocks bitmap block */
- uint32_t inode_bitmap_lo; /* Inodes bitmap block */
- uint32_t inode_table_first_block_lo; /* Inodes table block */
- uint16_t free_blocks_count_lo; /* Free blocks count */
- uint16_t free_inodes_count_lo; /* Free inodes count */
- uint16_t used_dirs_count_lo; /* Directories count */
- uint16_t flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */
- uint32_t exclude_bitmap_lo; /* Exclude bitmap for snapshots */
- uint16_t block_bitmap_csum_lo; /* crc32c(s_uuid+grp_num+bbitmap) LE */
- uint16_t inode_bitmap_csum_lo; /* crc32c(s_uuid+grp_num+ibitmap) LE */
- uint16_t itable_unused_lo; /* Unused inodes count */
- uint16_t checksum; /* crc16(sb_uuid+group+desc) */
-
- uint32_t block_bitmap_hi; /* Blocks bitmap block MSB */
- uint32_t inode_bitmap_hi; /* I-nodes bitmap block MSB */
- uint32_t inode_table_first_block_hi; /* I-nodes table block MSB */
- uint16_t free_blocks_count_hi; /* Free blocks count MSB */
- uint16_t free_inodes_count_hi; /* Free i-nodes count MSB */
- uint16_t used_dirs_count_hi; /* Directories count MSB */
- uint16_t itable_unused_hi; /* Unused inodes count MSB */
- uint32_t exclude_bitmap_hi; /* Exclude bitmap block MSB */
- uint16_t block_bitmap_csum_hi; /* crc32c(s_uuid+grp_num+bbitmap) BE */
- uint16_t inode_bitmap_csum_hi; /* crc32c(s_uuid+grp_num+ibitmap) BE */
- uint32_t reserved; /* Padding */
-} ;
+ uint32_t block_bitmap_lo; /* Blocks bitmap block */
+ uint32_t inode_bitmap_lo; /* Inodes bitmap block */
+ uint32_t inode_table_first_block_lo; /* Inodes table block */
+ uint16_t free_blocks_count_lo; /* Free blocks count */
+ uint16_t free_inodes_count_lo; /* Free inodes count */
+ uint16_t used_dirs_count_lo; /* Directories count */
+ uint16_t flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */
+ uint32_t exclude_bitmap_lo; /* Exclude bitmap for snapshots */
+ uint16_t block_bitmap_csum_lo; /* crc32c(s_uuid+grp_num+bbitmap) LE */
+ uint16_t inode_bitmap_csum_lo; /* crc32c(s_uuid+grp_num+ibitmap) LE */
+ uint16_t itable_unused_lo; /* Unused inodes count */
+ uint16_t checksum; /* crc16(sb_uuid+group+desc) */
+
+ uint32_t block_bitmap_hi; /* Blocks bitmap block MSB */
+ uint32_t inode_bitmap_hi; /* I-nodes bitmap block MSB */
+ uint32_t inode_table_first_block_hi; /* I-nodes table block MSB */
+ uint16_t free_blocks_count_hi; /* Free blocks count MSB */
+ uint16_t free_inodes_count_hi; /* Free i-nodes count MSB */
+ uint16_t used_dirs_count_hi; /* Directories count MSB */
+ uint16_t itable_unused_hi; /* Unused inodes count MSB */
+ uint32_t exclude_bitmap_hi; /* Exclude bitmap block MSB */
+ uint16_t block_bitmap_csum_hi; /* crc32c(s_uuid+grp_num+bbitmap) BE */
+ uint16_t inode_bitmap_csum_hi; /* crc32c(s_uuid+grp_num+ibitmap) BE */
+ uint32_t reserved; /* Padding */
+};
struct ext4_block_group_ref {
struct ext4_block block;
bool dirty;
};
-#define EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE 32
-#define EXT4_MAX_BLOCK_GROUP_DESCRIPTOR_SIZE 64
+#define EXT4_MIN_BLOCK_GROUP_DESCRIPTOR_SIZE 32
+#define EXT4_MAX_BLOCK_GROUP_DESCRIPTOR_SIZE 64
-#define EXT4_MIN_BLOCK_SIZE 1024 /* 1 KiB */
-#define EXT4_MAX_BLOCK_SIZE 65536 /* 64 KiB */
-#define EXT4_REV0_INODE_SIZE 128
+#define EXT4_MIN_BLOCK_SIZE 1024 /* 1 KiB */
+#define EXT4_MAX_BLOCK_SIZE 65536 /* 64 KiB */
+#define EXT4_REV0_INODE_SIZE 128
-#define EXT4_INODE_BLOCK_SIZE 512
+#define EXT4_INODE_BLOCK_SIZE 512
-#define EXT4_INODE_DIRECT_BLOCK_COUNT 12
-#define EXT4_INODE_INDIRECT_BLOCK EXT4_INODE_DIRECT_BLOCK_COUNT
-#define EXT4_INODE_DOUBLE_INDIRECT_BLOCK (EXT4_INODE_INDIRECT_BLOCK + 1)
-#define EXT4_INODE_TRIPPLE_INDIRECT_BLOCK (EXT4_INODE_DOUBLE_INDIRECT_BLOCK + 1)
-#define EXT4_INODE_BLOCKS (EXT4_INODE_TRIPPLE_INDIRECT_BLOCK + 1)
-#define EXT4_INODE_INDIRECT_BLOCK_COUNT (EXT4_INODE_BLOCKS - EXT4_INODE_DIRECT_BLOCK_COUNT)
+#define EXT4_INODE_DIRECT_BLOCK_COUNT 12
+#define EXT4_INODE_INDIRECT_BLOCK EXT4_INODE_DIRECT_BLOCK_COUNT
+#define EXT4_INODE_DOUBLE_INDIRECT_BLOCK (EXT4_INODE_INDIRECT_BLOCK + 1)
+#define EXT4_INODE_TRIPPLE_INDIRECT_BLOCK (EXT4_INODE_DOUBLE_INDIRECT_BLOCK + 1)
+#define EXT4_INODE_BLOCKS (EXT4_INODE_TRIPPLE_INDIRECT_BLOCK + 1)
+#define EXT4_INODE_INDIRECT_BLOCK_COUNT \
+ (EXT4_INODE_BLOCKS - EXT4_INODE_DIRECT_BLOCK_COUNT)
/*
* Structure of an inode on the disk
*/
struct ext4_inode {
- uint16_t mode; /* File mode */
- uint16_t uid; /* Low 16 bits of owner uid */
- uint32_t size_lo; /* Size in bytes */
- uint32_t access_time; /* Access time */
- uint32_t change_inode_time; /* I-node change time */
- uint32_t modification_time; /* Modification time */
- uint32_t deletion_time; /* Deletion time */
- uint16_t gid; /* Low 16 bits of group id */
- uint16_t links_count; /* Links count */
- uint32_t blocks_count_lo; /* Blocks count */
- uint32_t flags; /* File flags */
- uint32_t unused_osd1; /* OS dependent - not used in HelenOS */
- uint32_t blocks[EXT4_INODE_BLOCKS]; /* Pointers to blocks */
- uint32_t generation; /* File version (for NFS) */
- uint32_t file_acl_lo; /* File ACL */
+ uint16_t mode; /* File mode */
+ uint16_t uid; /* Low 16 bits of owner uid */
+ uint32_t size_lo; /* Size in bytes */
+ uint32_t access_time; /* Access time */
+ uint32_t change_inode_time; /* I-node change time */
+ uint32_t modification_time; /* Modification time */
+ uint32_t deletion_time; /* Deletion time */
+ uint16_t gid; /* Low 16 bits of group id */
+ uint16_t links_count; /* Links count */
+ uint32_t blocks_count_lo; /* Blocks count */
+ uint32_t flags; /* File flags */
+ uint32_t unused_osd1; /* OS dependent - not used in HelenOS */
+ uint32_t blocks[EXT4_INODE_BLOCKS]; /* Pointers to blocks */
+ uint32_t generation; /* File version (for NFS) */
+ uint32_t file_acl_lo; /* File ACL */
uint32_t size_hi;
- uint32_t obso_faddr; /* Obsoleted fragment address */
+ uint32_t obso_faddr; /* Obsoleted fragment address */
union {
struct {
uint16_t gid_high;
uint32_t author;
} hurd2;
- } __attribute__ ((packed)) osd2;
+ } __attribute__((packed)) osd2;
uint16_t extra_isize;
uint16_t pad1;
- uint32_t ctime_extra; /* Extra change time (nsec << 2 | epoch) */
- uint32_t mtime_extra; /* Extra Modification time (nsec << 2 | epoch) */
- uint32_t atime_extra; /* Extra Access time (nsec << 2 | epoch) */
- uint32_t crtime; /* File creation time */
- uint32_t crtime_extra; /* Extra file creation time (nsec << 2 | epoch) */
- uint32_t version_hi; /* High 32 bits for 64-bit version */
-} __attribute__ ((packed)) ;
-
-#define EXT4_INODE_MODE_FIFO 0x1000
-#define EXT4_INODE_MODE_CHARDEV 0x2000
-#define EXT4_INODE_MODE_DIRECTORY 0x4000
-#define EXT4_INODE_MODE_BLOCKDEV 0x6000
-#define EXT4_INODE_MODE_FILE 0x8000
-#define EXT4_INODE_MODE_SOFTLINK 0xA000
-#define EXT4_INODE_MODE_SOCKET 0xC000
-#define EXT4_INODE_MODE_TYPE_MASK 0xF000
+ uint32_t ctime_extra; /* Extra change time (nsec << 2 | epoch) */
+ uint32_t mtime_extra; /* Extra Modification time (nsec << 2 | epoch) */
+ uint32_t atime_extra; /* Extra Access time (nsec << 2 | epoch) */
+ uint32_t crtime; /* File creation time */
+ uint32_t crtime_extra; /* Extra file creation time (nsec << 2 | epoch) */
+ uint32_t version_hi; /* High 32 bits for 64-bit version */
+} __attribute__((packed));
+
+#define EXT4_INODE_MODE_FIFO 0x1000
+#define EXT4_INODE_MODE_CHARDEV 0x2000
+#define EXT4_INODE_MODE_DIRECTORY 0x4000
+#define EXT4_INODE_MODE_BLOCKDEV 0x6000
+#define EXT4_INODE_MODE_FILE 0x8000
+#define EXT4_INODE_MODE_SOFTLINK 0xA000
+#define EXT4_INODE_MODE_SOCKET 0xC000
+#define EXT4_INODE_MODE_TYPE_MASK 0xF000
/*
* Inode flags
*/
-#define EXT4_INODE_FLAG_SECRM 0x00000001 /* Secure deletion */
-#define EXT4_INODE_FLAG_UNRM 0x00000002 /* Undelete */
-#define EXT4_INODE_FLAG_COMPR 0x00000004 /* Compress file */
-#define EXT4_INODE_FLAG_SYNC 0x00000008 /* Synchronous updates */
-#define EXT4_INODE_FLAG_IMMUTABLE 0x00000010 /* Immutable file */
-#define EXT4_INODE_FLAG_APPEND 0x00000020 /* writes to file may only append */
-#define EXT4_INODE_FLAG_NODUMP 0x00000040 /* do not dump file */
-#define EXT4_INODE_FLAG_NOATIME 0x00000080 /* do not update atime */
+#define EXT4_INODE_FLAG_SECRM 0x00000001 /* Secure deletion */
+#define EXT4_INODE_FLAG_UNRM 0x00000002 /* Undelete */
+#define EXT4_INODE_FLAG_COMPR 0x00000004 /* Compress file */
+#define EXT4_INODE_FLAG_SYNC 0x00000008 /* Synchronous updates */
+#define EXT4_INODE_FLAG_IMMUTABLE 0x00000010 /* Immutable file */
+#define EXT4_INODE_FLAG_APPEND 0x00000020 /* writes to file may only append */
+#define EXT4_INODE_FLAG_NODUMP 0x00000040 /* do not dump file */
+#define EXT4_INODE_FLAG_NOATIME 0x00000080 /* do not update atime */
/* Compression flags */
-#define EXT4_INODE_FLAG_DIRTY 0x00000100
-#define EXT4_INODE_FLAG_COMPRBLK 0x00000200 /* One or more compressed clusters */
-#define EXT4_INODE_FLAG_NOCOMPR 0x00000400 /* Don't compress */
-#define EXT4_INODE_FLAG_ECOMPR 0x00000800 /* Compression error */
-
-#define EXT4_INODE_FLAG_INDEX 0x00001000 /* hash-indexed directory */
-#define EXT4_INODE_FLAG_IMAGIC 0x00002000 /* AFS directory */
-#define EXT4_INODE_FLAG_JOURNAL_DATA 0x00004000 /* File data should be journaled */
-#define EXT4_INODE_FLAG_NOTAIL 0x00008000 /* File tail should not be merged */
-#define EXT4_INODE_FLAG_DIRSYNC 0x00010000 /* Dirsync behaviour (directories only) */
-#define EXT4_INODE_FLAG_TOPDIR 0x00020000 /* Top of directory hierarchies */
-#define EXT4_INODE_FLAG_HUGE_FILE 0x00040000 /* Set to each huge file */
-#define EXT4_INODE_FLAG_EXTENTS 0x00080000 /* Inode uses extents */
-#define EXT4_INODE_FLAG_EA_INODE 0x00200000 /* Inode used for large EA */
-#define EXT4_INODE_FLAG_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */
-#define EXT4_INODE_FLAG_RESERVED 0x80000000 /* reserved for ext4 lib */
-
-#define EXT4_INODE_ROOT_INDEX 2
+#define EXT4_INODE_FLAG_DIRTY 0x00000100
+#define EXT4_INODE_FLAG_COMPRBLK \
+ 0x00000200 /* One or more compressed clusters */
+#define EXT4_INODE_FLAG_NOCOMPR 0x00000400 /* Don't compress */
+#define EXT4_INODE_FLAG_ECOMPR 0x00000800 /* Compression error */
+
+#define EXT4_INODE_FLAG_INDEX 0x00001000 /* hash-indexed directory */
+#define EXT4_INODE_FLAG_IMAGIC 0x00002000 /* AFS directory */
+#define EXT4_INODE_FLAG_JOURNAL_DATA \
+ 0x00004000 /* File data should be journaled */
+#define EXT4_INODE_FLAG_NOTAIL 0x00008000 /* File tail should not be merged */
+#define EXT4_INODE_FLAG_DIRSYNC \
+ 0x00010000 /* Dirsync behaviour (directories only) */
+#define EXT4_INODE_FLAG_TOPDIR 0x00020000 /* Top of directory hierarchies */
+#define EXT4_INODE_FLAG_HUGE_FILE 0x00040000 /* Set to each huge file */
+#define EXT4_INODE_FLAG_EXTENTS 0x00080000 /* Inode uses extents */
+#define EXT4_INODE_FLAG_EA_INODE 0x00200000 /* Inode used for large EA */
+#define EXT4_INODE_FLAG_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */
+#define EXT4_INODE_FLAG_RESERVED 0x80000000 /* reserved for ext4 lib */
+
+#define EXT4_INODE_ROOT_INDEX 2
struct ext4_inode_ref {
- struct ext4_block block;
+ struct ext4_block block;
struct ext4_inode *inode;
- struct ext4_fs *fs;
+ struct ext4_fs *fs;
uint32_t index;
bool dirty;
-} ;
-
+};
-#define EXT4_DIRECTORY_FILENAME_LEN 255
+#define EXT4_DIRECTORY_FILENAME_LEN 255
-#define EXT4_DIRECTORY_FILETYPE_UNKNOWN 0
-#define EXT4_DIRECTORY_FILETYPE_REG_FILE 1
-#define EXT4_DIRECTORY_FILETYPE_DIR 2
-#define EXT4_DIRECTORY_FILETYPE_CHRDEV 3
-#define EXT4_DIRECTORY_FILETYPE_BLKDEV 4
-#define EXT4_DIRECTORY_FILETYPE_FIFO 5
-#define EXT4_DIRECTORY_FILETYPE_SOCK 6
-#define EXT4_DIRECTORY_FILETYPE_SYMLINK 7
+#define EXT4_DIRECTORY_FILETYPE_UNKNOWN 0
+#define EXT4_DIRECTORY_FILETYPE_REG_FILE 1
+#define EXT4_DIRECTORY_FILETYPE_DIR 2
+#define EXT4_DIRECTORY_FILETYPE_CHRDEV 3
+#define EXT4_DIRECTORY_FILETYPE_BLKDEV 4
+#define EXT4_DIRECTORY_FILETYPE_FIFO 5
+#define EXT4_DIRECTORY_FILETYPE_SOCK 6
+#define EXT4_DIRECTORY_FILETYPE_SYMLINK 7
-union ext4_directory_entry_ll_internal{
- uint8_t name_length_high; /* Higher 8 bits of name length */
- uint8_t inode_type; /* Type of referenced inode (in rev >= 0.5) */
-} __attribute__ ((packed));
+union ext4_directory_entry_ll_internal {
+ uint8_t name_length_high; /* Higher 8 bits of name length */
+ uint8_t inode_type; /* Type of referenced inode (in rev >= 0.5) */
+} __attribute__((packed));
/**
* Linked list directory entry structure
*/
struct ext4_directory_entry_ll {
- uint32_t inode; /* I-node for the entry */
- uint16_t entry_length; /* Distance to the next directory entry */
- uint8_t name_length; /* Lower 8 bits of name length */
+ uint32_t inode; /* I-node for the entry */
+ uint16_t entry_length; /* Distance to the next directory entry */
+ uint8_t name_length; /* Lower 8 bits of name length */
union ext4_directory_entry_ll_internal in;
- uint8_t name[EXT4_DIRECTORY_FILENAME_LEN]; /* Entry name */
-} __attribute__((packed)) ;
+ uint8_t name[EXT4_DIRECTORY_FILENAME_LEN]; /* Entry name */
+} __attribute__((packed));
struct ext4_directory_iterator {
struct ext4_inode_ref *inode_ref;
struct ext4_block current_block;
uint64_t current_offset;
- struct ext4_directory_entry_ll *current;
+ struct ext4_directory_entry_ll *current;
};
struct ext4_directory_search_result {
struct ext4_directory_dx_countlimit {
uint16_t limit;
uint16_t count;
-} ;
+};
struct ext4_directory_dx_dot_entry {
uint32_t inode;
uint8_t name_length;
uint8_t inode_type;
uint8_t name[4];
-} ;
+};
struct ext4_directory_dx_root_info {
uint32_t reserved_zero;
uint8_t info_length;
uint8_t indirect_levels;
uint8_t unused_flags;
-} ;
+};
struct ext4_directory_dx_entry {
uint32_t hash;
uint32_t block;
-} ;
+};
struct ext4_directory_dx_root {
struct ext4_directory_dx_dot_entry dots[2];
struct ext4_block block;
struct ext4_directory_dx_entry *entries;
struct ext4_directory_dx_entry *position;
-} ;
+};
-#define EXT4_ERR_BAD_DX_DIR (-25000)
+#define EXT4_ERR_BAD_DX_DIR (-25000)
-#define EXT4_LINK_MAX 65000
+#define EXT4_LINK_MAX 65000
/*
* This is the extent on-disk structure.
* It's used at the bottom of the tree.
*/
struct ext4_extent {
- uint32_t first_block; /* First logical block extent covers */
- uint16_t block_count; /* Number of blocks covered by extent */
- uint16_t start_hi; /* High 16 bits of physical block */
- uint32_t start_lo; /* Low 32 bits of physical block */
-} ;
+ uint32_t first_block; /* First logical block extent covers */
+ uint16_t block_count; /* Number of blocks covered by extent */
+ uint16_t start_hi; /* High 16 bits of physical block */
+ uint32_t start_lo; /* Low 32 bits of physical block */
+};
/*
* This is index on-disk structure.
* It's used at all the levels except the bottom.
*/
struct ext4_extent_index {
- uint32_t first_block; /* Index covers logical blocks from 'block' */
+ uint32_t first_block; /* Index covers logical blocks from 'block' */
/**
* Pointer to the physical block of the next
uint32_t leaf_lo;
uint16_t leaf_hi;
uint16_t padding;
-} ;
+};
/*
* Each block (leaves and indexes), even inode-stored has header.
*/
struct ext4_extent_header {
uint16_t magic;
- uint16_t entries_count; /* Number of valid entries */
- uint16_t max_entries_count; /* Capacity of store in entries */
- uint16_t depth; /* Has tree real underlying blocks? */
- uint32_t generation; /* generation of the tree */
-} ;
+ uint16_t entries_count; /* Number of valid entries */
+ uint16_t max_entries_count; /* Capacity of store in entries */
+ uint16_t depth; /* Has tree real underlying blocks? */
+ uint32_t generation; /* generation of the tree */
+};
struct ext4_extent_path {
struct ext4_block block;
struct ext4_extent_header *header;
struct ext4_extent_index *index;
struct ext4_extent *extent;
-} ;
-
-#define EXT4_EXTENT_MAGIC 0xF30A
+};
-#define EXT4_EXTENT_FIRST(header) \
- ((struct ext4_extent *) (((char *) (header)) + sizeof(struct ext4_extent_header)))
+#define EXT4_EXTENT_MAGIC 0xF30A
-#define EXT4_EXTENT_FIRST_INDEX(header) \
- ((struct ext4_extent_index *) (((char *) (header)) + sizeof(struct ext4_extent_header)))
+#define EXT4_EXTENT_FIRST(header) \
+ ((struct ext4_extent *)(((char *)(header)) + \
+ sizeof(struct ext4_extent_header)))
+#define EXT4_EXTENT_FIRST_INDEX(header) \
+ ((struct ext4_extent_index *)(((char *)(header)) + \
+ sizeof(struct ext4_extent_header)))
/* EXT3 HTree directory indexing */
-#define EXT2_HTREE_LEGACY 0
-#define EXT2_HTREE_HALF_MD4 1
-#define EXT2_HTREE_TEA 2
-#define EXT2_HTREE_LEGACY_UNSIGNED 3
-#define EXT2_HTREE_HALF_MD4_UNSIGNED 4
-#define EXT2_HTREE_TEA_UNSIGNED 5
-
-#define EXT2_HTREE_EOF 0x7FFFFFFFUL
+#define EXT2_HTREE_LEGACY 0
+#define EXT2_HTREE_HALF_MD4 1
+#define EXT2_HTREE_TEA 2
+#define EXT2_HTREE_LEGACY_UNSIGNED 3
+#define EXT2_HTREE_HALF_MD4_UNSIGNED 4
+#define EXT2_HTREE_TEA_UNSIGNED 5
+#define EXT2_HTREE_EOF 0x7FFFFFFFUL
struct ext4_hash_info {
uint32_t hash;
/*****************************************************************************/
-
#ifdef CONFIG_BIG_ENDIAN
static inline uint64_t to_le64(uint64_t n)
{
- return ((n & 0xff) << 56) |
- ((n & 0xff00) << 40) |
- ((n & 0xff0000) << 24) |
- ((n & 0xff000000LL) << 8) |
- ((n & 0xff00000000LL) >> 8) |
- ((n & 0xff0000000000LL) >> 24) |
- ((n & 0xff000000000000LL) >> 40) |
- ((n & 0xff00000000000000LL) >> 56);
+ return ((n & 0xff) << 56) | ((n & 0xff00) << 40) | ((n & 0xff0000) << 24) |
+ ((n & 0xff000000LL) << 8) | ((n & 0xff00000000LL) >> 8) |
+ ((n & 0xff0000000000LL) >> 24) | ((n & 0xff000000000000LL) >> 40) |
+ ((n & 0xff00000000000000LL) >> 56);
}
static inline uint32_t to_le32(uint32_t n)
{
- return ((n & 0xff) << 24) |
- ((n & 0xff00) << 8) |
- ((n & 0xff0000) >> 8) |
- ((n & 0xff000000) >> 24);
+ return ((n & 0xff) << 24) | ((n & 0xff00) << 8) | ((n & 0xff0000) >> 8) |
+ ((n & 0xff000000) >> 24);
}
static inline uint16_t to_le16(uint16_t n)
{
- return ((n & 0xff) << 8) |
- ((n & 0xff00) >> 8);
+ return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
}
-
#else
#define to_le64(_n) _n
#define to_le32(_n) _n
/****************************Access macros to ext4 structures*****************/
-#define ext4_get32(s, f) to_le32((s)->f)
-#define ext4_get16(s, f) to_le16((s)->f)
-#define ext4_get8(s, f) (s)->f
-
-
-#define ext4_set32(s, f, v) do { (s)->f = to_le32(v); }while(0)
-#define ext4_set16(s, f, v) do { (s)->f = to_le16(v); }while(0)
-#define ext4_set8 (s, f, v) do { (s)->f = (v); }while(0)
+#define ext4_get32(s, f) to_le32((s)->f)
+#define ext4_get16(s, f) to_le16((s)->f)
+#define ext4_get8(s, f) (s)->f
+
+#define ext4_set32(s, f, v) \
+ do { \
+ (s)->f = to_le32(v); \
+ } while (0)
+#define ext4_set16(s, f, v) \
+ do { \
+ (s)->f = to_le16(v); \
+ } while (0)
+#define ext4_set8 \
+ (s, f, v) do { (s)->f = (v); } \
+ while (0)
#endif /* EXT4_TYPES_H_ */
projects / lwext4.git / blobdiff