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 --- net/sched/cls_u32.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) (limited to 'net/sched/cls_u32.c') diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c index e25411a80f9b..f509b7907f8d 100644 --- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -48,7 +48,7 @@ struct tc_u_knode { struct tc_u_hnode *ht_up; struct tcf_exts exts; #ifdef CONFIG_NET_CLS_IND - char indev[IFNAMSIZ]; + int ifindex; #endif u8 fshift; struct tcf_result res; @@ -152,7 +152,7 @@ check_terminal: *res = n->res; #ifdef CONFIG_NET_CLS_IND - if (!tcf_match_indev(skb, n->indev)) { + if (!tcf_match_indev(skb, n->ifindex)) { n = n->next; goto next_knode; } @@ -527,9 +527,11 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp, #ifdef CONFIG_NET_CLS_IND if (tb[TCA_U32_INDEV]) { - err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV]); - if (err < 0) + int ret; + ret = tcf_change_indev(net, tb[TCA_U32_INDEV]); + if (ret < 0) goto errout; + n->ifindex = ret; } #endif tcf_exts_change(tp, &n->exts, &e); @@ -760,9 +762,12 @@ static int u32_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, goto nla_put_failure; #ifdef CONFIG_NET_CLS_IND - if (strlen(n->indev) && - nla_put_string(skb, TCA_U32_INDEV, n->indev)) - goto nla_put_failure; + if (n->ifindex) { + struct net_device *dev; + dev = __dev_get_by_index(net, n->ifindex); + if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name)) + goto nla_put_failure; + } #endif #ifdef CONFIG_CLS_U32_PERF if (nla_put(skb, TCA_U32_PCNT, -- cgit v1.2.3-70-g09d2