From: Jiri Pirko <[email protected]> This patch has been added to the 3.18 stable tree. If you have any objections, please let us know.
=============== [ Upstream commit 5968250c868ceee680aa77395b24e6ddcae17d36 ] Use them to push skb->vlan_tci into the payload and avoid code duplication. Signed-off-by: Jiri Pirko <[email protected]> Acked-by: Pravin B Shelar <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/net/vxlan.c | 22 ++++++---------------- include/linux/if_vlan.h | 34 ++++++++++++++++++++++++++++++++++ net/core/dev.c | 8 ++------ net/core/netpoll.c | 4 +--- net/ipv4/geneve.c | 11 +++-------- net/openvswitch/datapath.c | 4 +--- net/openvswitch/vport-gre.c | 12 ++++-------- 7 files changed, 51 insertions(+), 44 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index aa7b5af..bcb1778 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -1593,14 +1593,9 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs, if (unlikely(err)) return err; - if (vlan_tx_tag_present(skb)) { - skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, - vlan_tx_tag_get(skb)); - if (WARN_ON(!skb)) - return -ENOMEM; - - skb->vlan_tci = 0; - } + skb = vlan_hwaccel_push_inside(skb); + if (WARN_ON(!skb)) + return -ENOMEM; vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); vxh->vx_flags = htonl(VXLAN_FLAGS); @@ -1637,14 +1632,9 @@ int vxlan_xmit_skb(struct vxlan_sock *vs, if (unlikely(err)) return err; - if (vlan_tx_tag_present(skb)) { - skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, - vlan_tx_tag_get(skb)); - if (WARN_ON(!skb)) - return -ENOMEM; - - skb->vlan_tci = 0; - } + skb = vlan_hwaccel_push_inside(skb); + if (WARN_ON(!skb)) + return -ENOMEM; vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh)); vxh->vx_flags = htonl(VXLAN_FLAGS); diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 2f8bfc8..9b6b092 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -341,6 +341,40 @@ static inline struct sk_buff *vlan_insert_tag_set_proto(struct sk_buff *skb, return skb; } +/* + * __vlan_hwaccel_push_inside - pushes vlan tag to the payload + * @skb: skbuff to tag + * + * Pushes the VLAN tag from @skb->vlan_tci inside to the payload. + * + * Following the skb_unshare() example, in case of error, the calling function + * doesn't have to worry about freeing the original skb. + */ +static inline struct sk_buff *__vlan_hwaccel_push_inside(struct sk_buff *skb) +{ + skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, + vlan_tx_tag_get(skb)); + if (likely(skb)) + skb->vlan_tci = 0; + return skb; +} +/* + * vlan_hwaccel_push_inside - pushes vlan tag to the payload + * @skb: skbuff to tag + * + * Checks is tag is present in @skb->vlan_tci and if it is, it pushes the + * VLAN tag from @skb->vlan_tci inside to the payload. + * + * Following the skb_unshare() example, in case of error, the calling function + * doesn't have to worry about freeing the original skb. + */ +static inline struct sk_buff *vlan_hwaccel_push_inside(struct sk_buff *skb) +{ + if (vlan_tx_tag_present(skb)) + skb = __vlan_hwaccel_push_inside(skb); + return skb; +} + /** * __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting * @skb: skbuff to tag diff --git a/net/core/dev.c b/net/core/dev.c index 8a57104..5cdbc1b 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2663,12 +2663,8 @@ static struct sk_buff *validate_xmit_vlan(struct sk_buff *skb, netdev_features_t features) { if (vlan_tx_tag_present(skb) && - !vlan_hw_offload_capable(features, skb->vlan_proto)) { - skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, - vlan_tx_tag_get(skb)); - if (skb) - skb->vlan_tci = 0; - } + !vlan_hw_offload_capable(features, skb->vlan_proto)) + skb = __vlan_hwaccel_push_inside(skb); return skb; } diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 65d3723..e0ad5d1 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -79,8 +79,7 @@ static int netpoll_start_xmit(struct sk_buff *skb, struct net_device *dev, if (vlan_tx_tag_present(skb) && !vlan_hw_offload_capable(features, skb->vlan_proto)) { - skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, - vlan_tx_tag_get(skb)); + skb = __vlan_hwaccel_push_inside(skb); if (unlikely(!skb)) { /* This is actually a packet drop, but we * don't want the code that calls this @@ -88,7 +87,6 @@ static int netpoll_start_xmit(struct sk_buff *skb, struct net_device *dev, */ goto out; } - skb->vlan_tci = 0; } status = netdev_start_xmit(skb, dev, txq, false); diff --git a/net/ipv4/geneve.c b/net/ipv4/geneve.c index 6cdcd8c..fd0fe18 100644 --- a/net/ipv4/geneve.c +++ b/net/ipv4/geneve.c @@ -131,14 +131,9 @@ int geneve_xmit_skb(struct geneve_sock *gs, struct rtable *rt, if (unlikely(err)) return err; - if (vlan_tx_tag_present(skb)) { - skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, - vlan_tx_tag_get(skb)); - if (unlikely(!skb) - return -ENOMEM; - - skb->vlan_tci = 0; - } + skb = vlan_hwaccel_push_inside(skb); + if (unlikely(!skb)) + return -ENOMEM; gnvh = (struct genevehdr *)__skb_push(skb, sizeof(*gnvh) + opt_len); geneve_build_header(gnvh, tun_flags, vni, opt_len, opt); diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index c0ef691..28213df 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -423,12 +423,10 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, if (!nskb) return -ENOMEM; - nskb = vlan_insert_tag_set_proto(nskb, nskb->vlan_proto, - vlan_tx_tag_get(nskb)); + nskb = __vlan_hwaccel_push_inside(nskb); if (!nskb) return -ENOMEM; - nskb->vlan_tci = 0; skb = nskb; } diff --git a/net/openvswitch/vport-gre.c b/net/openvswitch/vport-gre.c index d2f2658..e88fa34 100644 --- a/net/openvswitch/vport-gre.c +++ b/net/openvswitch/vport-gre.c @@ -172,14 +172,10 @@ static int gre_tnl_send(struct vport *vport, struct sk_buff *skb) goto err_free_rt; } - if (vlan_tx_tag_present(skb)) { - skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, - vlan_tx_tag_get(skb)); - if (unlikely(!skb) { - err = -ENOMEM; - goto err_free_rt; - } - skb->vlan_tci = 0; + skb = vlan_hwaccel_push_inside(skb); + if (unlikely(!skb)) { + err = -ENOMEM; + goto err_free_rt; } /* Push Tunnel header. */ -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
