From 6ee400aafb60289b78fcde5ebccd8c4973fc53f4 Mon Sep 17 00:00:00 2001 From: Jesse Gross Date: Mon, 17 Jan 2011 20:46:00 +0000 Subject: net offloading: Do not mask out NETIF_F_HW_VLAN_TX for vlan. In netif_skb_features() we return only the features that are valid for vlans if we have a vlan packet. However, we should not mask out NETIF_F_HW_VLAN_TX since it enables transmission of vlan tags and is obviously valid. Reported-by: Eric Dumazet Signed-off-by: Jesse Gross Acked-by: Eric Dumazet Signed-off-by: David S. Miller --- net/core/dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 83507c265e48..4c58d11d3b68 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2023,13 +2023,13 @@ int netif_skb_features(struct sk_buff *skb) return harmonize_features(skb, protocol, features); } - features &= skb->dev->vlan_features; + features &= (skb->dev->vlan_features | NETIF_F_HW_VLAN_TX); if (protocol != htons(ETH_P_8021Q)) { return harmonize_features(skb, protocol, features); } else { features &= NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | - NETIF_F_GEN_CSUM; + NETIF_F_GEN_CSUM | NETIF_F_HW_VLAN_TX; return harmonize_features(skb, protocol, features); } } -- cgit v1.2.3 From d402786ea4f8433774a812d6b8635e737425cddd Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 19 Jan 2011 00:51:36 +0000 Subject: net: fix can_checksum_protocol() arguments swap commit 0363466866d901fbc (net offloading: Convert checksums to use centrally computed features.) mistakenly swapped can_checksum_protocol() arguments. This broke IPv6 on bnx2 for instance, on NIC without TCPv6 checksum offloads. Reported-by: Hans de Bruin Signed-off-by: Eric Dumazet Acked-by: Jesse Gross Signed-off-by: David S. Miller --- net/core/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 4c58d11d3b68..8393ec408cd4 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2001,7 +2001,7 @@ static bool can_checksum_protocol(unsigned long features, __be16 protocol) static int harmonize_features(struct sk_buff *skb, __be16 protocol, int features) { - if (!can_checksum_protocol(protocol, features)) { + if (!can_checksum_protocol(features, protocol)) { features &= ~NETIF_F_ALL_CSUM; features &= ~NETIF_F_SG; } else if (illegal_highdma(skb->dev, skb)) { -- cgit v1.2.3 From c506653d35249bb4738bb139c24362e1ae724bc1 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 24 Jan 2011 13:16:16 -0800 Subject: net: arp_ioctl() must hold RTNL Commit 941666c2e3e0 "net: RCU conversion of dev_getbyhwaddr() and arp_ioctl()" introduced a regression, reported by Jamie Heilman. "arp -Ds 192.168.2.41 eth0 pub" triggered the ASSERT_RTNL() assert in pneigh_lookup() Removing RTNL requirement from arp_ioctl() was a mistake, just revert that part. Reported-by: Jamie Heilman Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/core/dev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 8393ec408cd4..1e5077d2cca6 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -749,7 +749,8 @@ EXPORT_SYMBOL(dev_get_by_index); * @ha: hardware address * * Search for an interface by MAC address. Returns NULL if the device - * is not found or a pointer to the device. The caller must hold RCU + * is not found or a pointer to the device. + * The caller must hold RCU or RTNL. * The returned device has not had its ref count increased * and the caller must therefore be careful about locking * -- cgit v1.2.3 From 66c46d741e2e60f0e8b625b80edb0ab820c46d7a Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sat, 29 Jan 2011 20:44:54 -0800 Subject: gro: Reset dev pointer on reuse On older kernels the VLAN code may zero skb->dev before dropping it and causing it to be reused by GRO. Unfortunately we didn't reset skb->dev in that case which causes the next GRO user to get a bogus skb->dev pointer. This particular problem no longer happens with the current upstream kernel due to changes in VLAN processing. However, for correctness we should still reset the skb->dev pointer in the GRO reuse function in case a future user does the same thing. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/core/dev.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 24ea2d71e7ea..93e44dbf6793 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3424,6 +3424,7 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb) __skb_pull(skb, skb_headlen(skb)); skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb)); skb->vlan_tci = 0; + skb->dev = napi->dev; napi->skb = skb; } -- cgit v1.2.3 From 8587523640441a9ff2564ebc6efeb39497ad6709 Mon Sep 17 00:00:00 2001 From: Tom Herbert Date: Mon, 31 Jan 2011 16:23:42 -0800 Subject: net: Check rps_flow_table when RPS map length is 1 In get_rps_cpu, add check that the rps_flow_table for the device is NULL when trying to take fast path when RPS map length is one. Without this, RFS is effectively disabled if map length is one which is not correct. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller --- net/core/dev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 93e44dbf6793..4c907895876b 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2563,7 +2563,8 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb, map = rcu_dereference(rxqueue->rps_map); if (map) { - if (map->len == 1) { + if (map->len == 1 && + !rcu_dereference_raw(rxqueue->rps_flow_table)) { tcpu = map->cpus[0]; if (cpu_online(tcpu)) cpu = tcpu; -- cgit v1.2.3 From 6d152e23ad1a7a5b40fef1f42e017d66e6115159 Mon Sep 17 00:00:00 2001 From: Andy Gospodarek Date: Wed, 2 Feb 2011 14:53:25 -0800 Subject: gro: reset skb_iif on reuse Like Herbert's change from a few days ago: 66c46d741e2e60f0e8b625b80edb0ab820c46d7a gro: Reset dev pointer on reuse this may not be necessary at this point, but we should still clean up the skb->skb_iif. If not we may end up with an invalid valid for skb->skb_iif when the skb is reused and the check is done in __netif_receive_skb. Signed-off-by: Andy Gospodarek Signed-off-by: David S. Miller --- net/core/dev.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 4c907895876b..b6d0bf875a8e 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3426,6 +3426,7 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb) skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb)); skb->vlan_tci = 0; skb->dev = napi->dev; + skb->skb_iif = 0; napi->skb = skb; } -- cgit v1.2.3