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[BRIDGE]: Disable SG/GSO if TX checksum is off

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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: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2006-08-17 18:22:32 -07:00 committed by David S. Miller
parent 8311731afc
commit 78eb887733
2 changed files with 9 additions and 1 deletions
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3
include/linux/netdevice.h
View file

@ -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)

7
net/bridge/br_if.c
View file

@ -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;
}