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authorHerbert Xu <herbert@gondor.apana.org.au>2006-08-17 18:22:32 -0700
committerDavid S. Miller <davem@davemloft.net>2006-08-17 18:22:32 -0700
commit78eb887733ec8ff5d6e6c69e3c32a187a9303622 (patch)
tree1028d082b0240f04f1b0d8f91b9e2813e329710c
parent8311731afc439f508ab4d759edadedae75afb73e (diff)
[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: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/netdevice.h3
-rw-r--r--net/bridge/br_if.c7
2 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index c0c2b46face..50a4719512e 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -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)
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index f55ef682ef8..b1211d5342f 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -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;
}