From d3e68e036e4db72346fe9f5a38891c7db902b289 Mon Sep 17 00:00:00 2001 From: Magnus Karlsson Date: Thu, 7 Nov 2019 18:47:38 +0100 Subject: [PATCH] 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 Signed-off-by: Alexei Starovoitov Tested-by: William Tu Acked-by: Jonathan Lemon Link: https://lore.kernel.org/bpf/1573148860-30254-4-git-send-email-magnus.karlsson@intel.com --- src/xsk.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/xsk.c b/src/xsk.c index 8ebd810..303ed63 100644 --- a/src/xsk.c +++ b/src/xsk.c @@ -562,7 +562,8 @@ static int xsk_setup_xdp_prog(struct xsk_socket *xsk) } } - err = xsk_set_bpf_maps(xsk); + if (xsk->rx) + err = xsk_set_bpf_maps(xsk); if (err) { xsk_delete_bpf_maps(xsk); close(xsk->prog_fd); @@ -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));