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authorPavel Emelyanov <xemul@openvz.org>2007-10-15 13:02:51 -0700
committerDavid S. Miller <davem@davemloft.net>2007-10-15 13:02:51 -0700
commit4acad72ded8e3f0211bd2a762e23c28229c61a51 (patch)
treea5b75db4e9c9702a5299e56135beb4afc6b71d6e /net
parentf78a1b389288d8327db5a0f4526935b0da1d0967 (diff)
downloadlinux-4acad72ded8e3f0211bd2a762e23c28229c61a51.tar.bz2
[IPV6]: Consolidate the ip6_pol_route_(input|output) pair
The difference in both functions is in the "id" passed to the rt6_select, so just pass it as an extra argument from two outer helpers. This is minus 60 lines of code and 360 bytes of .text Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/route.c77
1 files changed, 9 insertions, 68 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 6ff19f9eb9ee..cce9941c11c6 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -663,7 +663,7 @@ static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *d
return rt;
}
-static struct rt6_info *ip6_pol_route_input(struct fib6_table *table,
+static struct rt6_info *ip6_pol_route(struct fib6_table *table, int oif,
struct flowi *fl, int flags)
{
struct fib6_node *fn;
@@ -682,7 +682,7 @@ restart_2:
fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
restart:
- rt = rt6_select(fn, fl->iif, strict | reachable);
+ rt = rt6_select(fn, oif, strict | reachable);
BACKTRACK(&fl->fl6_src);
if (rt == &ip6_null_entry ||
rt->rt6i_flags & RTF_CACHE)
@@ -735,6 +735,12 @@ out2:
return rt;
}
+static struct rt6_info *ip6_pol_route_input(struct fib6_table *table,
+ struct flowi *fl, int flags)
+{
+ return ip6_pol_route(table, fl->iif, fl, flags);
+}
+
void ip6_route_input(struct sk_buff *skb)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
@@ -761,72 +767,7 @@ void ip6_route_input(struct sk_buff *skb)
static struct rt6_info *ip6_pol_route_output(struct fib6_table *table,
struct flowi *fl, int flags)
{
- struct fib6_node *fn;
- struct rt6_info *rt, *nrt;
- int strict = 0;
- int attempts = 3;
- int err;
- int reachable = ipv6_devconf.forwarding ? 0 : RT6_LOOKUP_F_REACHABLE;
-
- strict |= flags & RT6_LOOKUP_F_IFACE;
-
-relookup:
- read_lock_bh(&table->tb6_lock);
-
-restart_2:
- fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
-
-restart:
- rt = rt6_select(fn, fl->oif, strict | reachable);
- BACKTRACK(&fl->fl6_src);
- if (rt == &ip6_null_entry ||
- rt->rt6i_flags & RTF_CACHE)
- goto out;
-
- dst_hold(&rt->u.dst);
- read_unlock_bh(&table->tb6_lock);
-
- if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP))
- nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src);
- else {
-#if CLONE_OFFLINK_ROUTE
- nrt = rt6_alloc_clone(rt, &fl->fl6_dst);
-#else
- goto out2;
-#endif
- }
-
- dst_release(&rt->u.dst);
- rt = nrt ? : &ip6_null_entry;
-
- dst_hold(&rt->u.dst);
- if (nrt) {
- err = ip6_ins_rt(nrt);
- if (!err)
- goto out2;
- }
-
- if (--attempts <= 0)
- goto out2;
-
- /*
- * Race condition! In the gap, when table->tb6_lock was
- * released someone could insert this route. Relookup.
- */
- dst_release(&rt->u.dst);
- goto relookup;
-
-out:
- if (reachable) {
- reachable = 0;
- goto restart_2;
- }
- dst_hold(&rt->u.dst);
- read_unlock_bh(&table->tb6_lock);
-out2:
- rt->u.dst.lastuse = jiffies;
- rt->u.dst.__use++;
- return rt;
+ return ip6_pol_route(table, fl->oif, fl, flags);
}
struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl)