From: Jakub Kicinski <kuba@kernel.org>
Date: Thu, 20 Nov 2025 02:10:20 +0000 (-0800)
Subject: netdevsim: pass packets thru GRO on Rx
X-Git-Tag: v6.19-rc1~170^2~103^2~4
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=40dd789bc5a76066fe3dc40328b609f8302f6216;p=thirdparty%2Fkernel%2Flinux.git

netdevsim: pass packets thru GRO on Rx

To replace veth in software GRO testing with netdevsim we need
GRO support in netdevsim. Luckily we already have NAPI support
so this change is trivial (compared to veth).

Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20251120021024.2944527-9-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index fa1d97885caaf..2b713db16cd0e 100644
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -433,13 +433,8 @@ static int nsim_rcv(struct nsim_rq *rq, int budget)
 		}
 
 		/* skb might be discard at netif_receive_skb, save the len */
-		skblen = skb->len;
-		skb_mark_napi_id(skb, &rq->napi);
-		ret = netif_receive_skb(skb);
-		if (ret == NET_RX_SUCCESS)
-			dev_dstats_rx_add(dev, skblen);
-		else
-			dev_dstats_rx_dropped(dev);
+		dev_dstats_rx_add(dev, skb->len);
+		napi_gro_receive(&rq->napi, skb);
 	}
 
 	nsim_start_peer_tx_queue(dev, rq);