From 93534d16f6d32923367251c13ed48f14c4bbf10b Mon Sep 17 00:00:00 2001 From: Magnus Karlsson Date: Thu, 6 May 2021 14:43:49 +0200 Subject: [PATCH] samples/bpf: Consider frame size in tx_only of xdpsock sample commit 3b80d106e110d39d3f678954d3b55078669cf07e upstream. Fix the tx_only micro-benchmark in xdpsock to take frame size into consideration. It was hardcoded to the default value of frame_size which is 4K. Changing this on the command line to 2K made half of the packets illegal as they were outside the umem and were therefore discarded by the kernel. Fixes: 46738f73ea4f ("samples/bpf: add use of need_wakeup flag in xdpsock") Signed-off-by: Magnus Karlsson Signed-off-by: Daniel Borkmann Acked-by: Maciej Fijalkowski Link: https://lore.kernel.org/bpf/20210506124349.6666-1-magnus.karlsson@gmail.com Signed-off-by: Greg Kroah-Hartman --- samples/bpf/xdpsock_user.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c index 1e2a1105d0e67..1278b8f03fc45 100644 --- a/samples/bpf/xdpsock_user.c +++ b/samples/bpf/xdpsock_user.c @@ -1282,7 +1282,7 @@ static void tx_only(struct xsk_socket_info *xsk, u32 *frame_nb, int batch_size) for (i = 0; i < batch_size; i++) { struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx, idx + i); - tx_desc->addr = (*frame_nb + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT; + tx_desc->addr = (*frame_nb + i) * opt_xsk_frame_size; tx_desc->len = PKT_SIZE; }