xfs_da3_node_hdr
struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
memset(hdr3, 0, sizeof(struct xfs_da3_node_hdr));
#define XFS_DA3_NODE_CRC_OFF (offsetof(struct xfs_da3_node_hdr, info.crc))
struct xfs_da3_node_hdr hdr;
dageo->node_hdr_size = sizeof(struct xfs_da3_node_hdr);
XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
struct xfs_da3_node_hdr *nodehdr3 = blk->bp->b_addr;