diff options
| -rw-r--r-- | include/linux/netdevice.h | 2 | ||||
| -rw-r--r-- | net/core/dev.c | 79 |
2 files changed, 50 insertions, 31 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 9deb672d999f..920361bc27e7 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2671,6 +2671,8 @@ extern void netdev_upper_dev_unlink(struct net_device *dev, extern int skb_checksum_help(struct sk_buff *skb); extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb, netdev_features_t features, bool tx_path); +extern struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, + netdev_features_t features); static inline struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) diff --git a/net/core/dev.c b/net/core/dev.c index f44473696b8b..67deae60214c 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2327,37 +2327,20 @@ out: } EXPORT_SYMBOL(skb_checksum_help); -/* openvswitch calls this on rx path, so we need a different check. - */ -static inline bool skb_needs_check(struct sk_buff *skb, bool tx_path) -{ - if (tx_path) - return skb->ip_summed != CHECKSUM_PARTIAL; - else - return skb->ip_summed == CHECKSUM_NONE; -} - /** - * __skb_gso_segment - Perform segmentation on skb. + * skb_mac_gso_segment - mac layer segmentation handler. * @skb: buffer to segment * @features: features for the output path (see dev->features) - * @tx_path: whether it is called in TX path - * - * This function segments the given skb and returns a list of segments. - * - * It may return NULL if the skb requires no segmentation. This is - * only possible when GSO is used for verifying header integrity. */ -struct sk_buff *__skb_gso_segment(struct sk_buff *skb, - netdev_features_t features, bool tx_path) +struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, + netdev_features_t features) { struct sk_buff *segs = ERR_PTR(-EPROTONOSUPPORT); struct packet_offload *ptype; __be16 type = skb->protocol; - int vlan_depth = ETH_HLEN; - int err; while (type == htons(ETH_P_8021Q)) { + int vlan_depth = ETH_HLEN; struct vlan_hdr *vh; if (unlikely(!pskb_may_pull(skb, vlan_depth + VLAN_HLEN))) @@ -2368,22 +2351,14 @@ struct sk_buff *__skb_gso_segment(struct sk_buff *skb, vlan_depth += VLAN_HLEN; } - skb_reset_mac_header(skb); - skb->mac_len = skb->network_header - skb->mac_header; __skb_pull(skb, skb->mac_len); - if (unlikely(skb_needs_check(skb, tx_path))) { - skb_warn_bad_offload(skb); - - if (skb_header_cloned(skb) && - (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) - return ERR_PTR(err); - } - rcu_read_lock(); list_for_each_entry_rcu(ptype, &offload_base, list) { if (ptype->type == type && ptype->callbacks.gso_segment) { if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) { + int err; + err = ptype->callbacks.gso_send_check(skb); segs = ERR_PTR(err); if (err || skb_gso_ok(skb, features)) @@ -2401,6 +2376,48 @@ struct sk_buff *__skb_gso_segment(struct sk_buff *skb, return segs; } +EXPORT_SYMBOL(skb_mac_gso_segment); + + +/* openvswitch calls this on rx path, so we need a different check. + */ +static inline bool skb_needs_check(struct sk_buff *skb, bool tx_path) +{ + if (tx_path) + return skb->ip_summed != CHECKSUM_PARTIAL; + else + return skb->ip_summed == CHECKSUM_NONE; +} + +/** + * __skb_gso_segment - Perform segmentation on skb. + * @skb: buffer to segment + * @features: features for the output path (see dev->features) + * @tx_path: whether it is called in TX path + * + * This function segments the given skb and returns a list of segments. + * + * It may return NULL if the skb requires no segmentation. This is + * only possible when GSO is used for verifying header integrity. + */ +struct sk_buff *__skb_gso_segment(struct sk_buff *skb, + netdev_features_t features, bool tx_path) +{ + if (unlikely(skb_needs_check(skb, tx_path))) { + int err; + + skb_warn_bad_offload(skb); + + if (skb_header_cloned(skb) && + (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) + return ERR_PTR(err); + } + + skb_reset_mac_header(skb); + skb_reset_mac_len(skb); + + return skb_mac_gso_segment(skb, features); +} EXPORT_SYMBOL(__skb_gso_segment); /* Take action when hardware reception checksum errors are detected. */ |