From 734907e82d21a75a514b80164185427a832a00c0 Mon Sep 17 00:00:00 2001 From: Rich Lane Date: Fri, 8 Feb 2013 09:30:23 -0800 Subject: [PATCH 1/6] openvswitch: Fix ovs_vport_cmd_del return value on success If the pointer does not represent an error then the PTR_ERR macro may still return a nonzero value. The fix is the same as in ovs_vport_cmd_set. Signed-off-by: Rich Lane Signed-off-by: Jesse Gross --- net/openvswitch/datapath.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index f996db343247..5e275b903f3c 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -1772,6 +1772,7 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(reply)) goto exit_unlock; + err = 0; ovs_dp_detach_port(vport); genl_notify(reply, genl_info_net(info), info->snd_portid, From cb7c5bdffb727a3d4dea5247d9d1d52238b01d90 Mon Sep 17 00:00:00 2001 From: Rich Lane Date: Fri, 8 Feb 2013 13:18:01 -0800 Subject: [PATCH 2/6] openvswitch: Fix ovs_vport_cmd_new return value on success If the pointer does not represent an error then the PTR_ERR macro may still return a nonzero value. Signed-off-by: Rich Lane Signed-off-by: Jesse Gross --- net/openvswitch/datapath.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index 5e275b903f3c..a2cd3e6d03a2 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -1691,6 +1691,7 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(vport)) goto exit_unlock; + err = 0; reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq, OVS_VPORT_CMD_NEW); if (IS_ERR(reply)) { From a15ff76c955d17cf58313097e4a24124da022b1d Mon Sep 17 00:00:00 2001 From: Rich Lane Date: Fri, 15 Feb 2013 11:07:43 -0800 Subject: [PATCH 3/6] openvswitch: Call genlmsg_end in queue_userspace_packet Without genlmsg_end the upcall message ends (according to nlmsg_len) after the struct ovs_header. Signed-off-by: Rich Lane Signed-off-by: Jesse Gross --- net/openvswitch/datapath.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index a2cd3e6d03a2..cae1062f94ba 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -395,6 +395,7 @@ static int queue_userspace_packet(struct net *net, int dp_ifindex, skb_copy_and_csum_dev(skb, nla_data(nla)); + genlmsg_end(user_skb, upcall); err = genlmsg_unicast(net, user_skb, upcall_info->portid); out: From 17b682a04841233f827073b327c6533e478dfcd4 Mon Sep 17 00:00:00 2001 From: Rich Lane Date: Tue, 19 Feb 2013 11:10:30 -0800 Subject: [PATCH 4/6] openvswitch: Fix parsing invalid LLC/SNAP ethertypes Before this patch, if an LLC/SNAP packet with OUI 00:00:00 had an ethertype less than 1536 the flow key given to userspace in the upcall would contain the invalid ethertype (for example, 3). If userspace attempted to insert a kernel flow for this key it would be rejected by ovs_flow_from_nlattrs. This patch allows OVS to pass the OFTest pktact.DirectBadLlcPackets. Signed-off-by: Rich Lane Signed-off-by: Jesse Gross --- net/openvswitch/flow.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index c3294cebc4f2..0c98d406124b 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -484,7 +484,11 @@ static __be16 parse_ethertype(struct sk_buff *skb) return htons(ETH_P_802_2); __skb_pull(skb, sizeof(struct llc_snap_hdr)); - return llc->ethertype; + + if (ntohs(llc->ethertype) >= 1536) + return llc->ethertype; + + return htons(ETH_P_802_2); } static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, From 7b024082b2b279af58e24ebd46e81777723d58da Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Fri, 22 Feb 2013 17:32:26 +0800 Subject: [PATCH 5/6] openvswitch: fix the calculation of checksum for vlan header In vlan_insert_tag(), we insert a 4-byte VLAN header _after_ mac header: memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN); ... veth->h_vlan_proto = htons(ETH_P_8021Q); ... veth->h_vlan_TCI = htons(vlan_tci); so after it, we should recompute the checksum to include these 4 bytes. skb->data still points to the mac header, therefore VLAN header is at (2 * ETH_ALEN = 12) bytes after it, not (ETH_HLEN = 14) bytes. This can also be observed via tcpdump: 0x0000: ffff ffff ffff 5254 005d 6f6e 8100 000a 0x0010: 0806 0001 0800 0604 0001 5254 005d 6f6e 0x0020: c0a8 026e 0000 0000 0000 c0a8 0282 Similar for __pop_vlan_tci(), the vlan header we remove is the one overwritten in: memmove(skb->data + VLAN_HLEN, skb->data, 2 * ETH_ALEN); Therefore the VLAN_HLEN = 4 bytes after 2 * ETH_ALEN is the part we want to sub from checksum. Cc: David S. Miller Cc: Jesse Gross Signed-off-by: Cong Wang Signed-off-by: Jesse Gross --- net/openvswitch/actions.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index ac2defeeba83..d4d5363c7ba7 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -58,7 +58,7 @@ static int __pop_vlan_tci(struct sk_buff *skb, __be16 *current_tci) if (skb->ip_summed == CHECKSUM_COMPLETE) skb->csum = csum_sub(skb->csum, csum_partial(skb->data - + ETH_HLEN, VLAN_HLEN, 0)); + + (2 * ETH_ALEN), VLAN_HLEN, 0)); vhdr = (struct vlan_hdr *)(skb->data + ETH_HLEN); *current_tci = vhdr->h_vlan_TCI; @@ -115,7 +115,7 @@ static int push_vlan(struct sk_buff *skb, const struct ovs_action_push_vlan *vla if (skb->ip_summed == CHECKSUM_COMPLETE) skb->csum = csum_add(skb->csum, csum_partial(skb->data - + ETH_HLEN, VLAN_HLEN, 0)); + + (2 * ETH_ALEN), VLAN_HLEN, 0)); } __vlan_hwaccel_put_tag(skb, ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT); From d176ca2a48ff2b5d7becfacdcbd1d72c73bd22d1 Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Fri, 22 Feb 2013 19:41:26 +0800 Subject: [PATCH 6/6] openvswitch: remove some useless comments These comments are useless in upstream kernel. Cc: David S. Miller Cc: Jesse Gross Signed-off-by: Cong Wang Signed-off-by: Jesse Gross --- net/openvswitch/vport-netdev.c | 3 +-- net/openvswitch/vport.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c index 670cbc3518de..2130d61c384a 100644 --- a/net/openvswitch/vport-netdev.c +++ b/net/openvswitch/vport-netdev.c @@ -43,8 +43,7 @@ static void netdev_port_receive(struct vport *vport, struct sk_buff *skb) /* Make our own copy of the packet. Otherwise we will mangle the * packet for anyone who came before us (e.g. tcpdump via AF_PACKET). - * (No one comes after us, since we tell handle_bridge() that we took - * the packet.) */ + */ skb = skb_share_check(skb, GFP_ATOMIC); if (unlikely(!skb)) return; diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 70af0bedbac4..6255e48e64c4 100644 --- a/net/openvswitch/vport.c +++ b/net/openvswitch/vport.c @@ -326,8 +326,7 @@ int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb) * @skb: skb that was received * * Must be called with rcu_read_lock. The packet cannot be shared and - * skb->data should point to the Ethernet header. The caller must have already - * called compute_ip_summed() to initialize the checksumming fields. + * skb->data should point to the Ethernet header. */ void ovs_vport_receive(struct vport *vport, struct sk_buff *skb) {