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[IPV6]: Optimize hop-limit determination.

Browse Source 
Last part of hop-limit determination is always:
    hoplimit = dst_metric(dst, RTAX_HOPLIMIT);
    if (hoplimit < 0)
        hoplimit = ipv6_get_hoplimit(dst->dev).

Let's consolidate it as ip6_dst_hoplimit(dst).

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2008-03-10 06:00:30 -04:00
parent 4725474584
commit 6b75d09081
8 changed files with 18 additions and 28 deletions
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2
include/net/addrconf.h
View File

@ -123,8 +123,6 @@ extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
extern int ipv6_get_hoplimit(struct net_device *dev);
/*
* anycast prototypes (anycast.c)
*/

2
include/net/ip6_route.h
View File

@ -88,6 +88,8 @@ extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
const struct in6_addr *addr,
int anycast);
extern int ip6_dst_hoplimit(struct dst_entry *dst);
/*
* support functions for ND
*

8
net/ipv6/icmp.c
View File

@ -464,9 +464,7 @@ route_done:
else
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = dst_metric(dst, RTAX_HOPLIMIT);
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
hlimit = ip6_dst_hoplimit(dst);
tclass = np->tclass;
if (tclass < 0)
@ -560,9 +558,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
else
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = dst_metric(dst, RTAX_HOPLIMIT);
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
hlimit = ip6_dst_hoplimit(dst);
tclass = np->tclass;
if (tclass < 0)

4
net/ipv6/ip6_output.c
View File

@ -237,9 +237,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
if (np)
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = dst_metric(dst, RTAX_HOPLIMIT);
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
hlimit = ip6_dst_hoplimit(dst);
tclass = -1;
if (np)

4
net/ipv6/ipv6_sockglue.c
View File

@ -904,9 +904,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
dst = sk_dst_get(sk);
if (dst) {
if (val < 0)
val = dst_metric(dst, RTAX_HOPLIMIT);
if (val < 0)
val = ipv6_get_hoplimit(dst->dev);
val = ip6_dst_hoplimit(dst);
dst_release(dst);
}
if (val < 0)

4
net/ipv6/raw.c
View File

@ -885,9 +885,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
else
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = dst_metric(dst, RTAX_HOPLIMIT);
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
hlimit = ip6_dst_hoplimit(dst);
}
if (tclass < 0) {

18
net/ipv6/route.c
View File

@ -1034,15 +1034,17 @@ static int ipv6_get_mtu(struct net_device *dev)
return mtu;
}
int ipv6_get_hoplimit(struct net_device *dev)
int ip6_dst_hoplimit(struct dst_entry *dst)
{
int hoplimit = ipv6_devconf.hop_limit;
struct inet6_dev *idev;
idev = in6_dev_get(dev);
if (idev) {
hoplimit = idev->cnf.hop_limit;
in6_dev_put(idev);
int hoplimit = dst_metric(dst, RTAX_HOPLIMIT);
if (hoplimit < 0) {
struct net_device *dev = dst->dev;
struct inet6_dev *idev = in6_dev_get(dev);
if (idev) {
hoplimit = idev->cnf.hop_limit;
in6_dev_put(idev);
} else
hoplimit = ipv6_devconf.hop_limit;
}
return hoplimit;
}

4
net/ipv6/udp.c
View File

@ -792,9 +792,7 @@ do_udp_sendmsg:
else
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = dst_metric(dst, RTAX_HOPLIMIT);
if (hlimit < 0)
hlimit = ipv6_get_hoplimit(dst->dev);
hlimit = ip6_dst_hoplimit(dst);
}
if (tclass < 0) {