From: Lorenzo Bianconi Date: Tue, 21 Nov 2023 19:08:44 +0000 (+0100) Subject: net: veth: fix ethtool stats reporting X-Git-Tag: v6.6.7~453 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=db7b6161338bbe88f27da0ea956ac16cc2f995da;p=platform%2Fkernel%2Flinux-starfive.git net: veth: fix ethtool stats reporting [ Upstream commit 818ad9cc90d4a7165caaee7e32800c50d0564ec3 ] Fix a possible misalignment between page_pool stats and tx xdp_stats reported in veth_get_ethtool_stats routine. The issue can be reproduced configuring the veth pair with the following tx/rx queues: $ip link add v0 numtxqueues 2 numrxqueues 4 type veth peer name v1 \ numtxqueues 1 numrxqueues 1 and loading a simple XDP program on v0 that just returns XDP_PASS. In this case on v0 the page_pool stats overwrites tx xdp_stats for queue 1. Fix the issue incrementing pp_idx of dev->real_num_tx_queues * VETH_TQ_STATS_LEN since we always report xdp_stats for all tx queues in ethtool. Fixes: 4fc418053ec7 ("net: veth: add page_pool stats") Signed-off-by: Lorenzo Bianconi Link: https://lore.kernel.org/r/c5b5d0485016836448453f12846c7c4ab75b094a.1700593593.git.lorenzo@kernel.org Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- diff --git a/drivers/net/veth.c b/drivers/net/veth.c index 0ee5d1e..af326b9 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -236,8 +236,8 @@ static void veth_get_ethtool_stats(struct net_device *dev, data[tx_idx + j] += *(u64 *)(base + offset); } } while (u64_stats_fetch_retry(&rq_stats->syncp, start)); - pp_idx = tx_idx + VETH_TQ_STATS_LEN; } + pp_idx = idx + dev->real_num_tx_queues * VETH_TQ_STATS_LEN; page_pool_stats: veth_get_page_pool_stats(dev, &data[pp_idx]);