753 typedef struct xfs_agi {  struct
757 	__be32		agi_magicnum;	/* magic number == XFS_AGI_MAGIC */
758 	__be32		agi_versionnum;	/* header version == XFS_AGI_VERSION */
759 	__be32		agi_seqno;	/* sequence # starting from 0 */
760 	__be32		agi_length;	/* size in blocks of a.g. */
766 	__be32		agi_count;	/* count of allocated inodes */
767 	__be32		agi_root;	/* root of inode btree */
768 	__be32		agi_level;	/* levels in inode btree */
769 	__be32		agi_freecount;	/* number of free inodes */
793 } xfs_agi_t;  argument
795 #define XFS_AGI_CRC_OFF		offsetof(struct xfs_agi, agi_crc)  argument