xfs_perag_resv
len -= xfs_perag_resv(pag, type)->ar_reserved;
resv = xfs_perag_resv(pag, type);
resv = xfs_perag_resv(pag, type);
xfs_perag_resv(pag, XFS_AG_RESV_METADATA)->ar_reserved +
xfs_perag_resv(pag, XFS_AG_RESV_RMAPBT)->ar_reserved >
resv = xfs_perag_resv(pag, type);
resv = xfs_perag_resv(pag, type);
struct xfs_ag_resv *r = xfs_perag_resv(pag, resv);