From 2519a602c273c5254781bc55b6e678a17e469a12 Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Thu, 9 Jan 2014 16:14:02 -0800 Subject: net_sched: optimize tcf_match_indev() tcf_match_indev() is called in fast path, it is not wise to search for a netdev by ifindex and then compare by its name, just compare the ifindex. Also, dev->name could be changed by user-space, therefore the match would be always fail, but dev->ifindex could be consistent. BTW, this will also save some bytes from the core struct of u32. Cc: Jamal Hadi Salim Cc: David S. Miller Signed-off-by: Cong Wang Signed-off-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- include/net/pkt_cls.h | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) (limited to 'include') diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h index 50ea07969c09..a2441fb1428f 100644 --- a/include/net/pkt_cls.h +++ b/include/net/pkt_cls.h @@ -338,27 +338,27 @@ static inline int tcf_valid_offset(const struct sk_buff *skb, #include static inline int -tcf_change_indev(struct tcf_proto *tp, char *indev, struct nlattr *indev_tlv) +tcf_change_indev(struct net *net, struct nlattr *indev_tlv) { + char indev[IFNAMSIZ]; + struct net_device *dev; + if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) return -EINVAL; - return 0; + dev = __dev_get_by_name(net, indev); + if (!dev) + return -ENODEV; + return dev->ifindex; } -static inline int -tcf_match_indev(struct sk_buff *skb, char *indev) +static inline bool +tcf_match_indev(struct sk_buff *skb, int ifindex) { - struct net_device *dev; - - if (indev[0]) { - if (!skb->skb_iif) - return 0; - dev = __dev_get_by_index(dev_net(skb->dev), skb->skb_iif); - if (!dev || strcmp(indev, dev->name)) - return 0; - } - - return 1; + if (!ifindex) + return true; + if (!skb->skb_iif) + return false; + return ifindex == skb->skb_iif; } #endif /* CONFIG_NET_CLS_IND */ -- cgit