netdev - [PATCH 1/2] ixgbe: fix gso type

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Message-ID: <76c44c70077f42302d7b079b29fd414205747af5.1360191528.git.mst@redhat.com>
Date:	Thu, 7 Feb 2013 01:02:50 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Eilon Greenstein <eilong@...adcom.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	Greg Rose <gregory.v.rose@...el.com>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
	Alex Duyck <alexander.h.duyck@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	Tushar Dave <tushar.n.dave@...el.com>,
	Jitendra Kalsaria <jitendra.kalsaria@...gic.com>,
	Sony Chacko <sony.chacko@...gic.com>, linux-driver@...gic.com,
	John Fastabend <john.r.fastabend@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jacob Keller <jacob.e.keller@...el.com>,
	linux-kernel@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
	bhutchings@...arflare.com, eric.dumazet@...il.com
Subject: [PATCH 1/2] ixgbe: fix gso type

ixgbe set gso_size but not gso_type. This leads to
crashes in macvtap.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---

I tested that this fixes the crash for me.  I am told on ixgbe LRO only
triggers with TCP so checking protocol should be enough?

 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 396e280..9d01673 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1399,6 +1399,10 @@ static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
 	/* set gso_size to avoid messing up TCP MSS */
 	skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
 						 IXGBE_CB(skb)->append_cnt);
+	if (skb->protocol == ETH_P_IPV6)
+		skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
+	else
+		skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
 }
 
 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
@@ -1433,6 +1437,8 @@ static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
 {
 	struct net_device *dev = rx_ring->netdev;
 
+	skb->protocol = eth_type_trans(skb, dev);
+
 	ixgbe_update_rsc_stats(rx_ring, skb);
 
 	ixgbe_rx_hash(rx_ring, rx_desc, skb);
@@ -1448,8 +1454,6 @@ static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
 	}
 
 	skb_record_rx_queue(skb, rx_ring->queue_index);
-
-	skb->protocol = eth_type_trans(skb, dev);
 }
 
 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
-- 
MST

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