Commit a68977d2 authored Nov 07, 2019 by Magnus Karlsson Committed by Alexei Starovoitov Nov 10, 2019

libbpf: Allow for creating Rx or Tx only AF_XDP sockets



The libbpf AF_XDP code is extended to allow for the creation of Rx
only or Tx only sockets. Previously it returned an error if the socket
was not initialized for both Rx and Tx.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: William Tu <u9012063@gmail.com>
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Link: https://lore.kernel.org/bpf/1573148860-30254-4-git-send-email-magnus.karlsson@intel.com

parent 2e5d72c1

tools/lib/bpf/xsk.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -562,6 +562,7 @@ static int xsk_setup_xdp_prog(struct xsk_socket *xsk)
		}
		}

		if (xsk->rx)
		err = xsk_set_bpf_maps(xsk);
		if (err) {
		xsk_delete_bpf_maps(xsk);
		@@ -583,7 +584,7 @@ int xsk_socket__create(struct xsk_socket *xsk_ptr, const char ifname,
		struct xsk_socket *xsk;
		int err;

		if (!umem \|\| !xsk_ptr \|\| !rx \|\| !tx)
		if (!umem \|\| !xsk_ptr \|\| !(rx \|\| tx))
		return -EFAULT;

		xsk = calloc(1, sizeof(*xsk));

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