[RFC net-next 2/9] xdp: add XDP_FLAGS_GRO_DISABLED flag
From: Yan Zhai <hidden>
Date: 2024-06-20 22:19:17
Also in:
bpf, lkml
Subsystem:
networking [general], the rest, xdp (express data path) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Alexei Starovoitov, Daniel Borkmann, David S. Miller, Jesper Dangaard Brouer, John Fastabend
Allow XDP program to set XDP_FLAGS_GRO_DISABLED flag in xdp_buff and xdp_frame, and disable GRO when building an sk_buff if this flag is set. Signed-off-by: Yan Zhai <redacted> --- include/net/xdp.h | 38 +++++++++++++++++++++++++++++++++++++- 1 file changed, 37 insertions(+), 1 deletion(-)
diff --git a/include/net/xdp.h b/include/net/xdp.h
index e6770dd40c91..cc3bce8817b0 100644
--- a/include/net/xdp.h
+++ b/include/net/xdp.h@@ -75,6 +75,7 @@ enum xdp_buff_flags { XDP_FLAGS_FRAGS_PF_MEMALLOC = BIT(1), /* xdp paged memory is under * pressure */ + XDP_FLAGS_GRO_DISABLED = BIT(2), /* GRO disabled */ }; struct xdp_buff {
@@ -113,12 +114,35 @@ static __always_inline void xdp_buff_set_frag_pfmemalloc(struct xdp_buff *xdp) xdp->flags |= XDP_FLAGS_FRAGS_PF_MEMALLOC; } +static __always_inline void xdp_buff_disable_gro(struct xdp_buff *xdp) +{ + xdp->flags |= XDP_FLAGS_GRO_DISABLED; +} + +static __always_inline bool xdp_buff_gro_disabled(struct xdp_buff *xdp) +{ + return !!(xdp->flags & XDP_FLAGS_GRO_DISABLED); +} + +static __always_inline void +xdp_buff_fixup_skb_offloading(struct xdp_buff *xdp, struct sk_buff *skb) +{ + if (xdp_buff_gro_disabled(xdp)) + skb_disable_gro(skb); +} + +static __always_inline void +xdp_init_buff_minimal(struct xdp_buff *xdp) +{ + xdp->flags = 0; +} + static __always_inline void xdp_init_buff(struct xdp_buff *xdp, u32 frame_sz, struct xdp_rxq_info *rxq) { xdp->frame_sz = frame_sz; xdp->rxq = rxq; - xdp->flags = 0; + xdp_init_buff_minimal(xdp); } static __always_inline void
@@ -187,6 +211,18 @@ static __always_inline bool xdp_frame_is_frag_pfmemalloc(struct xdp_frame *frame return !!(frame->flags & XDP_FLAGS_FRAGS_PF_MEMALLOC); } +static __always_inline bool xdp_frame_gro_disabled(struct xdp_frame *frame) +{ + return !!(frame->flags & XDP_FLAGS_GRO_DISABLED); +} + +static __always_inline void +xdp_frame_fixup_skb_offloading(struct xdp_frame *frame, struct sk_buff *skb) +{ + if (xdp_frame_gro_disabled(frame)) + skb_disable_gro(skb); +} + #define XDP_BULK_QUEUE_SIZE 16 struct xdp_frame_bulk { int count;
--
2.30.2