-typedef __u16 __le16;
-typedef __u32 __le32;
-typedef __u64 __le64;
-
-/*
- * Structure of the super block
- */
-struct ext4_super_block {
-/*00*/ __le32 s_inodes_count; /* Inodes count */
- __le32 s_blocks_count_lo; /* Blocks count */
- __le32 s_r_blocks_count_lo; /* Reserved blocks count */
- __le32 s_free_blocks_count_lo; /* Free blocks count */
-/*10*/ __le32 s_free_inodes_count; /* Free inodes count */
- __le32 s_first_data_block; /* First Data Block */
- __le32 s_log_block_size; /* Block size */
- __le32 s_obso_log_frag_size; /* Obsoleted fragment size */
-/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
- __le32 s_obso_frags_per_group; /* Obsoleted fragments per group */
- __le32 s_inodes_per_group; /* # Inodes per group */
- __le32 s_mtime; /* Mount time */
-/*30*/ __le32 s_wtime; /* Write time */
- __le16 s_mnt_count; /* Mount count */
- __le16 s_max_mnt_count; /* Maximal mount count */
- __le16 s_magic; /* Magic signature */
- __le16 s_state; /* File system state */
- __le16 s_errors; /* Behaviour when detecting errors */
- __le16 s_minor_rev_level; /* minor revision level */
-/*40*/ __le32 s_lastcheck; /* time of last check */
- __le32 s_checkinterval; /* max. time between checks */
- __le32 s_creator_os; /* OS */
- __le32 s_rev_level; /* Revision level */
-/*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
- __le16 s_def_resgid; /* Default gid for reserved blocks */
- /*
- * These fields are for EXT4_DYNAMIC_REV superblocks only.
- *
- * Note: the difference between the compatible feature set and
- * the incompatible feature set is that if there is a bit set
- * in the incompatible feature set that the kernel doesn't
- * know about, it should refuse to mount the filesystem.
- *
- * e2fsck's requirements are more strict; if it doesn't know
- * about a feature in either the compatible or incompatible
- * feature set, it must abort and not try to meddle with
- * things it doesn't understand...
- */
- __le32 s_first_ino; /* First non-reserved inode */
- __le16 s_inode_size; /* size of inode structure */
- __le16 s_block_group_nr; /* block group # of this superblock */
- __le32 s_feature_compat; /* compatible feature set */
-/*60*/ __le32 s_feature_incompat; /* incompatible feature set */
- __le32 s_feature_ro_compat; /* readonly-compatible feature set */
-/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
-/*78*/ char s_volume_name[16]; /* volume name */
-/*88*/ char s_last_mounted[64]; /* directory where last mounted */
-/*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
- /*
- * Performance hints. Directory preallocation should only
- * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
- */
- __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
- __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
- __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
- /*
- * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
- */
-/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
-/*E0*/ __le32 s_journal_inum; /* inode number of journal file */
- __le32 s_journal_dev; /* device number of journal file */
- __le32 s_last_orphan; /* start of list of inodes to delete */
- __le32 s_hash_seed[4]; /* HTREE hash seed */
- __u8 s_def_hash_version; /* Default hash version to use */
- __u8 s_reserved_char_pad;
- __le16 s_desc_size; /* size of group descriptor */
-/*100*/ __le32 s_default_mount_opts;
- __le32 s_first_meta_bg; /* First metablock block group */
- __le32 s_mkfs_time; /* When the filesystem was created */
- __le32 s_jnl_blocks[17]; /* Backup of the journal inode */
- /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
-/*150*/ __le32 s_blocks_count_hi; /* Blocks count */
- __le32 s_r_blocks_count_hi; /* Reserved blocks count */
- __le32 s_free_blocks_count_hi; /* Free blocks count */
- __le16 s_min_extra_isize; /* All inodes have at least # bytes */
- __le16 s_want_extra_isize; /* New inodes should reserve # bytes */
- __le32 s_flags; /* Miscellaneous flags */
- __le16 s_raid_stride; /* RAID stride */
- __le16 s_mmp_interval; /* # seconds to wait in MMP checking */
- __le64 s_mmp_block; /* Block for multi-mount protection */
- __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
- __u8 s_log_groups_per_flex; /* FLEX_BG group size */
- __u8 s_reserved_char_pad2;
- __le16 s_reserved_pad;
- __u32 s_reserved[162]; /* Padding to the end of the block */
-};
-
-char lost_found_dir[PATH_MAX + 1];
-int block_size;
-int extents_before_defrag;
-int extents_after_defrag;
-int mode_flag;
-unsigned int current_uid;
-unsigned int defraged_file_count;
-unsigned int frag_files_before_defrag;
-unsigned int frag_files_after_defrag;
-unsigned int regular_count;
-unsigned int succeed_cnt;
-unsigned int total_count;
-__u8 log_groups_per_flex;
-__le32 blocks_per_group;
-__le32 feature_incompat;
-ext4_fsblk_t files_block_count;
-struct frag_statistic_ino frag_rank[SHOW_FRAG_FILES];
-
-
-/* Local definitions of some syscalls glibc may not yet have */
-
-#ifndef HAVE_POSIX_FADVISE
-#warning Using locally defined posix_fadvise interface.
-
-#ifndef __NR_fadvise64_64
-#error Your kernel headers dont define __NR_fadvise64_64
-#endif
-
-/*
- * fadvise() - Give advice about file access.
- *
- * @fd: defrag target file's descriptor.
- * @offset: file offset.
- * @len: area length.
- * @advise: process flag.
- */
-static int posix_fadvise(int fd, loff_t offset, size_t len, int advise)
-{
- return syscall(__NR_fadvise64_64, fd, offset, len, advise);
-}
-#endif /* ! HAVE_FADVISE64_64 */
-
-#ifndef HAVE_SYNC_FILE_RANGE
-#warning Using locally defined sync_file_range interface.