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Commit 78eb8877 authored by Herbert Xu's avatar Herbert Xu Committed by David S. Miller
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[BRIDGE]: Disable SG/GSO if TX checksum is off 



When the bridge recomputes features, it does not maintain the
constraint that SG/GSO must be off if TX checksum is off.
This patch adds that constraint.

On a completely unrelated note, I've also added TSO6 and TSO_ECN
feature bits if GSO is enabled on the underlying device through
the new NETIF_F_GSO_SOFTWARE macro.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8311731a

include/linux/netdevice.h

+3 −0
Original line number Diff line number Diff line
@@ -320,6 +320,9 @@ struct net_device 
#define NETIF_F_TSO_ECN		(SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)

#define NETIF_F_TSO6		(SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)



	/* List of features with software fallbacks. */

#define NETIF_F_GSO_SOFTWARE	(NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)



#define NETIF_F_GEN_CSUM	(NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)

#define NETIF_F_ALL_CSUM	(NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)

net/bridge/br_if.c

+6 −1
Original line number Diff line number Diff line
@@ -386,12 +386,17 @@ void br_features_recompute(struct net_bridge *br) 
			checksum = 0;



		if (feature & NETIF_F_GSO)

			feature |= NETIF_F_TSO;

			feature |= NETIF_F_GSO_SOFTWARE;

		feature |= NETIF_F_GSO;



		features &= feature;

	}



	if (!(checksum & NETIF_F_ALL_CSUM))

		features &= ~NETIF_F_SG;

	if (!(features & NETIF_F_SG))

		features &= ~NETIF_F_GSO_MASK;



	br->dev->features = features | checksum | NETIF_F_LLTX |

			    NETIF_F_GSO_ROBUST;

}