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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2014-01-09 16:14:02 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-13 11:50:15 -0800 |
| commit | 2519a602c273c5254781bc55b6e678a17e469a12 (patch) | |
| tree | fcfbf3b98b6e186ea042d8167ddbde5b4fff63f2 /include/net | |
| parent | 832d1d5bfaefafa5aa40282f6765c6d996fe384e (diff) | |
| download | linux-stable-2519a602c273c5254781bc55b6e678a17e469a12.tar.gz linux-stable-2519a602c273c5254781bc55b6e678a17e469a12.tar.bz2 linux-stable-2519a602c273c5254781bc55b6e678a17e469a12.zip | |
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 <jhs@mojatatu.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/pkt_cls.h | 30 |
1 files changed, 15 insertions, 15 deletions
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 <net/net_namespace.h> 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 */ |