e2fsck.h

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#define PR_4_PASS_HEADER        0x040000  /* Pass 4: Checking reference counts */
#define PR_4_ZERO_LEN_INODE     0x040001  /* Unattached zero-length inode */
#define PR_4_UNATTACHED_INODE   0x040002  /* Unattached inode */
#define PR_4_BAD_REF_COUNT      0x040003  /* Inode ref count wrong */
#define PR_4_INCONSISTENT_COUNT 0x040004  /* Inconsistent inode count information cached */

/*
 * Pass 5 errors
 */

#define PR_5_PASS_HEADER            0x050000  /* Pass 5: Checking group summary information */
#define PR_5_INODE_BMAP_PADDING     0x050001  /* Padding at end of inode bitmap is not set. */
#define PR_5_BLOCK_BMAP_PADDING     0x050002  /* Padding at end of block bitmap is not set. */
#define PR_5_BLOCK_BITMAP_HEADER    0x050003  /* Block bitmap differences header */
#define PR_5_BLOCK_UNUSED           0x050004  /* Block not used, but marked in bitmap */
#define PR_5_BLOCK_USED             0x050005  /* Block used, but not marked used in bitmap */
#define PR_5_BLOCK_BITMAP_END       0x050006  /* Block bitmap differences end */
#define PR_5_INODE_BITMAP_HEADER    0x050007  /* Inode bitmap differences header */
#define PR_5_INODE_UNUSED           0x050008  /* Inode not used, but marked in bitmap */
#define PR_5_INODE_USED             0x050009  /* Inode used, but not marked used in bitmap */
#define PR_5_INODE_BITMAP_END       0x05000A  /* Inode bitmap differences end */
#define PR_5_FREE_INODE_COUNT_GROUP 0x05000B  /* Free inodes count for group wrong */
#define PR_5_FREE_DIR_COUNT_GROUP   0x05000C  /* Directories count for group wrong */
#define PR_5_FREE_INODE_COUNT       0x05000D  /* Free inodes count wrong */
#define PR_5_FREE_BLOCK_COUNT_GROUP 0x05000E  /* Free blocks count for group wrong */
#define PR_5_FREE_BLOCK_COUNT       0x05000F  /* Free blocks count wrong */
#define PR_5_BMAP_ENDPOINTS         0x050010  /* Programming error: bitmap endpoints don't match */
#define PR_5_FUDGE_BITMAP_ERROR     0x050011  /* Internal error: fudging end of bitmap */
#define PR_5_COPY_IBITMAP_ERROR     0x050012  /* Error copying in replacement inode bitmap */
#define PR_5_COPY_BBITMAP_ERROR     0x050013  /* Error copying in replacement block bitmap */
#define PR_5_BLOCK_RANGE_UNUSED     0x050014  /* Block range not used, but marked in bitmap */
#define PR_5_BLOCK_RANGE_USED       0x050015  /* Block range used, but not marked used in bitmap */
#define PR_5_INODE_RANGE_UNUSED     0x050016  /* Inode range not used, but marked in bitmap */
#define PR_5_INODE_RANGE_USED       0x050017  /* Inode rangeused, but not marked used in bitmap */


/*
 * The directory information structure; stores directory information
 * collected in earlier passes, to avoid disk i/o in fetching the
 * directory information.
 */
struct dir_info {
	ext2_ino_t              ino;    /* Inode number */
	ext2_ino_t              dotdot; /* Parent according to '..' */
	ext2_ino_t              parent; /* Parent according to treewalk */
};



/*
 * The indexed directory information structure; stores information for
 * directories which contain a hash tree index.
 */
struct dx_dir_info {
	ext2_ino_t              ino;            /* Inode number */
	int                     numblocks;      /* number of blocks */
	int                     hashversion;
	short                   depth;          /* depth of tree */
	struct dx_dirblock_info *dx_block;      /* Array of size numblocks */
};

/*
 * Define the extended attribute refcount structure
 */
typedef struct ea_refcount *ext2_refcount_t;

struct e2fsck_struct {
	ext2_filsys fs;
	const char *program_name;
	char *filesystem_name;
	char *device_name;
	char *io_options;
	int     flags;          /* E2fsck internal flags */
	int     options;
	blk_t   use_superblock; /* sb requested by user */
	blk_t   superblock;     /* sb used to open fs */
	int     blocksize;      /* blocksize */
	blk_t   num_blocks;     /* Total number of blocks */
	int     mount_flags;
	blkid_cache blkid;      /* blkid cache */

	jmp_buf abort_loc;

	unsigned long abort_code;

	int (*progress)(e2fsck_t ctx, int pass, unsigned long cur,
			unsigned long max);

	ext2fs_inode_bitmap inode_used_map; /* Inodes which are in use */
	ext2fs_inode_bitmap inode_bad_map; /* Inodes which are bad somehow */
	ext2fs_inode_bitmap inode_dir_map; /* Inodes which are directories */
	ext2fs_inode_bitmap inode_imagic_map; /* AFS inodes */
	ext2fs_inode_bitmap inode_reg_map; /* Inodes which are regular files*/

	ext2fs_block_bitmap block_found_map; /* Blocks which are in use */
	ext2fs_block_bitmap block_dup_map; /* Blks referenced more than once */
	ext2fs_block_bitmap block_ea_map; /* Blocks which are used by EA's */

	/*
	 * Inode count arrays
	 */
	ext2_icount_t   inode_count;
	ext2_icount_t inode_link_info;

	ext2_refcount_t refcount;
	ext2_refcount_t refcount_extra;

	/*
	 * Array of flags indicating whether an inode bitmap, block
	 * bitmap, or inode table is invalid
	 */
	int *invalid_inode_bitmap_flag;
	int *invalid_block_bitmap_flag;
	int *invalid_inode_table_flag;
	int invalid_bitmaps;    /* There are invalid bitmaps/itable */

	/*
	 * Block buffer
	 */
	char *block_buf;

	/*
	 * For pass1_check_directory and pass1_get_blocks
	 */
	ext2_ino_t stashed_ino;
	struct ext2_inode *stashed_inode;

	/*
	 * Location of the lost and found directory
	 */
	ext2_ino_t lost_and_found;
	int bad_lost_and_found;

	/*
	 * Directory information
	 */
	int             dir_info_count;
	int             dir_info_size;
	struct dir_info *dir_info;

	/*
	 * Indexed directory information
	 */
	int             dx_dir_info_count;
	int             dx_dir_info_size;
	struct dx_dir_info *dx_dir_info;

	/*
	 * Directories to hash
	 */
	ext2_u32_list   dirs_to_hash;

	/*
	 * Tuning parameters
	 */
	int process_inode_size;
	int inode_buffer_blocks;

	/*
	 * ext3 journal support
	 */
	io_channel      journal_io;
	char    *journal_name;

	/*
	 * How we display the progress update (for unix)
	 */
	int progress_fd;
	int progress_pos;
	int progress_last_percent;
	unsigned int progress_last_time;
	int interactive;        /* Are we connected directly to a tty? */
	char start_meta[2], stop_meta[2];

	/* File counts */
	int fs_directory_count;
	int fs_regular_count;
	int fs_blockdev_count;
	int fs_chardev_count;
	int fs_links_count;
	int fs_symlinks_count;
	int fs_fast_symlinks_count;
	int fs_fifo_count;
	int fs_total_count;
	int fs_sockets_count;
	int fs_ind_count;
	int fs_dind_count;
	int fs_tind_count;
	int fs_fragmented;
	int large_files;
	int fs_ext_attr_inodes;
	int fs_ext_attr_blocks;

	int ext_attr_ver;

	/*
	 * For the use of callers of the e2fsck functions; not used by
	 * e2fsck functions themselves.
	 */
	void *priv_data;
};


#define tid_gt(x, y)		((x - y) > 0)

static inline int tid_geq(tid_t x, tid_t y)
{
	int difference = (x - y);
	return (difference >= 0);
}