620 typedef struct xfs_agf {  struct
624 	__be32		agf_magicnum;	/* magic number == XFS_AGF_MAGIC */
625 	__be32		agf_versionnum;	/* header version == XFS_AGF_VERSION */
626 	__be32		agf_seqno;	/* sequence # starting from 0 */
627 	__be32		agf_length;	/* size in blocks of a.g. */
631 	__be32		agf_roots[XFS_BTNUM_AGF];	/* root blocks */
632 	__be32		agf_levels[XFS_BTNUM_AGF];	/* btree levels */
634 	__be32		agf_flfirst;	/* first freelist block's index */
635 	__be32		agf_fllast;	/* last freelist block's index */
636 	__be32		agf_flcount;	/* count of blocks in freelist */
637 	__be32		agf_freeblks;	/* total free blocks */
662 } xfs_agf_t;  argument
664 #define XFS_AGF_CRC_OFF		offsetof(struct xfs_agf, agf_crc)  argument