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xsk: add zero-copy support for Rx

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Extend the xsk_rcv to support the new MEM_TYPE_ZERO_COPY memory, and
wireup ndo_bpf call in bind.

Signed-off-by: Björn Töpel <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
This commit is contained in:
Björn Töpel 2018-06-04 14:05:55 +02:00 • committed by Daniel Borkmann
commit 173d3adb6f
5 changed files with 165 additions and 21 deletions
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6
include/net/xdp_sock.h
View file

@ -22,6 +22,7 @@ struct xdp_umem_props {
struct xdp_umem_page {
void *addr;
dma_addr_t dma;
};
struct xdp_umem {
@ -38,6 +39,9 @@ struct xdp_umem {
struct work_struct work;
struct page **pgs;
u32 npgs;
struct net_device *dev;
u16 queue_id;
bool zc;
};
struct xdp_sock {
@ -60,6 +64,8 @@ int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
void xsk_flush(struct xdp_sock *xs);
bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr);
void xsk_umem_discard_addr(struct xdp_umem *umem);
#else
static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
{