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ipv6: Add rt6_get_cookie() function 

commit b197df4f0f3782782e9ea8996e91b65ae33e8dd9 upstream.

Instead of doing the rt6->rt6i_node check whenever we need
to get the route's cookie.  Refactor it into rt6_get_cookie().
It is a prep work to handle FLOWI_FLAG_KNOWN_NH and also
percpu rt6_info later.

Change-Id: I15221a1abc4ab608498275603f98bee922e3ce95
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2:
 - Drop changes in inet6_sk_rx_dst_set(), sctp_v6_get_dst()
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Martin KaFai Lau 2015-05-22 20:56:01 -07:00 committed by syphyr
parent 7bcc3459b4
commit 6317ba9a29
5 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/net/ip6_fib.h
View File

@ -196,6 +196,11 @@ static inline void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
rt->dst.from = new;
}
static inline u32 rt6_get_cookie(const struct rt6_info *rt)
{
return rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
}
static inline void ip6_rt_put(struct rt6_info *rt)
{
/* dst_release() accepts a NULL parameter.

2
include/net/ip6_route.h
View File

@ -171,7 +171,7 @@ static inline void __ip6_dst_store(struct sock *sk, struct dst_entry *dst,
#ifdef CONFIG_IPV6_SUBTREES
np->saddr_cache = saddr;
#endif
np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
np->dst_cookie = rt6_get_cookie(rt);
}
static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,

2
net/ipv6/ip6_tunnel.c
View File

@ -159,7 +159,7 @@ EXPORT_SYMBOL_GPL(ip6_tnl_dst_reset);
void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst)
{
struct rt6_info *rt = (struct rt6_info *) dst;
t->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
t->dst_cookie = rt6_get_cookie(rt);
dst_release(t->dst_cache);
t->dst_cache = dst;
}

6
net/ipv6/xfrm6_policy.c
View File

@ -85,8 +85,7 @@ static int xfrm6_init_path(struct xfrm_dst *path, struct dst_entry *dst,
{
if (dst->ops->family == AF_INET6) {
struct rt6_info *rt = (struct rt6_info*)dst;
if (rt->rt6i_node)
path->path_cookie = rt->rt6i_node->fn_sernum;
path->path_cookie = rt6_get_cookie(rt);
}
path->u.rt6.rt6i_nfheader_len = nfheader_len;
@ -116,8 +115,7 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
RTF_LOCAL);
xdst->u.rt6.rt6i_metric = rt->rt6i_metric;
xdst->u.rt6.rt6i_node = rt->rt6i_node;
if (rt->rt6i_node)
xdst->route_cookie = rt->rt6i_node->fn_sernum;
xdst->route_cookie = rt6_get_cookie(rt);
xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway;
xdst->u.rt6.rt6i_dst = rt->rt6i_dst;
xdst->u.rt6.rt6i_src = rt->rt6i_src;

2
net/netfilter/ipvs/ip_vs_xmit.c
View File

@ -373,7 +373,7 @@ __ip_vs_get_out_rt_v6(struct sk_buff *skb, struct ip_vs_dest *dest,
goto err_unreach;
}
rt = (struct rt6_info *) dst;
cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
cookie = rt6_get_cookie(rt);
__ip_vs_dst_set(dest, dest_dst, &rt->dst, cookie);
spin_unlock_bh(&dest->dst_lock);
IP_VS_DBG(10, "new dst %pI6, src %pI6, refcnt=%d\n",