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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2008-03-10 06:00:30 -0400
committerYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2008-03-25 10:24:00 +0900
commit6b75d0908185bf853b188afa6f269426f6554c5b (patch)
tree85f28296077f3d873bbda249dc0eafcc911164fd /net/ipv6
parent4725474584d6aa2f07b3d47442dfbc4f6544f65e (diff)
[IPV6]: Optimize hop-limit determination.
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>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/icmp.c8
-rw-r--r--net/ipv6/ip6_output.c4
-rw-r--r--net/ipv6/ipv6_sockglue.c4
-rw-r--r--net/ipv6/raw.c4
-rw-r--r--net/ipv6/route.c20
-rw-r--r--net/ipv6/udp.c4
6 files changed, 17 insertions, 27 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 6b5391ab834..86332417b40 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -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)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index ed6482667a2..2a4f08c8a02 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -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)
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index c11c76cab37..8e29fb1d1df 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -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)
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index a9e4235157a..548d0763f4d 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -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) {
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a4b5aee0f68..aa3f08718e4 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1034,15 +1034,17 @@ static int ipv6_get_mtu(struct net_device *dev)
return mtu;
}
-int ipv6_get_hoplimit(struct net_device *dev)
-{
- 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 ip6_dst_hoplimit(struct dst_entry *dst)
+{
+ 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;
}
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 5f5d1218c34..593d3efadaf 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -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) {