xfs_dir3_free_hdr
struct xfs_dir3_free_hdr hdr;
dageo->free_hdr_size = sizeof(struct xfs_dir3_free_hdr);
struct xfs_dir3_free_hdr *hdr3 = bp->b_addr;
memset(bp->b_addr, 0, sizeof(struct xfs_dir3_free_hdr));
struct xfs_dir3_free_hdr *hdr3 = bp->b_addr;
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
struct xfs_dir3_free_hdr *hdr3 = bp->b_addr;