netdev - [PATCH net-next 08/12] netdevsim: pass packets thru GRO on Rx

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251117205810.1617533-9-kuba@kernel.org>
Date: Mon, 17 Nov 2025 12:58:06 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	horms@...nel.org,
	willemdebruijn.kernel@...il.com,
	shuah@...nel.org,
	sdf@...ichev.me,
	krakauer@...gle.com,
	linux-kselftest@...r.kernel.org,
	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 08/12] 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 (comapred to veth).

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 drivers/net/netdevsim/netdev.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index fa1d97885caa..2b713db16cd0 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);
-- 
2.51.1