From 965a990984432cd01a9eb3514c64d86f56704295 Mon Sep 17 00:00:00 2001 From: Magnus Karlsson Date: Wed, 2 May 2018 13:01:26 +0200 Subject: xsk: add support for bind for Rx Here, the bind syscall is added. Binding an AF_XDP socket, means associating the socket to an umem, a netdev and a queue index. This can be done in two ways. The first way, creating a "socket from scratch". Create the umem using the XDP_UMEM_REG setsockopt and an associated fill queue with XDP_UMEM_FILL_QUEUE. Create the Rx queue using the XDP_RX_QUEUE setsockopt. Call bind passing ifindex and queue index ("channel" in ethtool speak). The second way to bind a socket, is simply skipping the umem/netdev/queue index, and passing another already setup AF_XDP socket. The new socket will then have the same umem/netdev/queue index as the parent so it will share the same umem. You must also set the flags field in the socket address to XDP_SHARED_UMEM. v2: Use PTR_ERR instead of passing error variable explicitly. Signed-off-by: Magnus Karlsson Signed-off-by: Alexei Starovoitov --- net/xdp/xdp_umem.h | 1 + 1 file changed, 1 insertion(+) (limited to 'net/xdp/xdp_umem.h') diff --git a/net/xdp/xdp_umem.h b/net/xdp/xdp_umem.h index 25634b8a5c6f..b13133e9c501 100644 --- a/net/xdp/xdp_umem.h +++ b/net/xdp/xdp_umem.h @@ -39,6 +39,7 @@ struct xdp_umem { struct work_struct work; }; +bool xdp_umem_validate_queues(struct xdp_umem *umem); int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr); void xdp_get_umem(struct xdp_umem *umem); void xdp_put_umem(struct xdp_umem *umem); -- cgit