482 typedef struct xfs_agf {  struct
486 	__be32		agf_magicnum;	/* magic number == XFS_AGF_MAGIC */
487 	__be32		agf_versionnum;	/* header version == XFS_AGF_VERSION */
488 	__be32		agf_seqno;	/* sequence # starting from 0 */
489 	__be32		agf_length;	/* size in blocks of a.g. */
493 	__be32		agf_roots[XFS_BTNUM_AGF];	/* root blocks */
494 	__be32		agf_levels[XFS_BTNUM_AGF];	/* btree levels */
496 	__be32		agf_flfirst;	/* first freelist block's index */
497 	__be32		agf_fllast;	/* last freelist block's index */
498 	__be32		agf_flcount;	/* count of blocks in freelist */
499 	__be32		agf_freeblks;	/* total free blocks */
524 } xfs_agf_t;  argument
526 #define XFS_AGF_CRC_OFF		offsetof(struct xfs_agf, agf_crc)  argument