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authorfan.du <fan.du@windriver.com>2013-07-30 08:33:53 +0800
committerDavid S. Miller <davem@davemloft.net>2013-07-31 14:56:36 -0700
commitca4c3fc24e293719fe7410c4e63da9b6bc633b83 (patch)
tree0461841f3d10b11a26ebe1a0adc99c7b00a489a2 /include
parentba361cb3d4c977e2b94b5d97905f66b4d48964de (diff)
net: split rt_genid for ipv4 and ipv6
Current net name space has only one genid for both IPv4 and IPv6, it has below drawbacks: - Add/delete an IPv4 address will invalidate all IPv6 routing table entries. - Insert/remove XFRM policy will also invalidate both IPv4/IPv6 routing table entries even when the policy is only applied for one address family. Thus, this patch attempt to split one genid for two to cater for IPv4 and IPv6 separately in a fine granularity. Signed-off-by: Fan Du <fan.du@windriver.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/net_namespace.h37
-rw-r--r--include/net/netns/ipv4.h1
-rw-r--r--include/net/netns/ipv6.h1
3 files changed, 34 insertions, 5 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 84e37b1ca9e..1313456a099 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -119,7 +119,6 @@ struct net {
struct netns_ipvs *ipvs;
#endif
struct sock *diag_nlsk;
- atomic_t rt_genid;
atomic_t fnhe_genid;
};
@@ -333,14 +332,42 @@ static inline void unregister_net_sysctl_table(struct ctl_table_header *header)
}
#endif
-static inline int rt_genid(struct net *net)
+static inline int rt_genid_ipv4(struct net *net)
{
- return atomic_read(&net->rt_genid);
+ return atomic_read(&net->ipv4.rt_genid);
}
-static inline void rt_genid_bump(struct net *net)
+static inline void rt_genid_bump_ipv4(struct net *net)
{
- atomic_inc(&net->rt_genid);
+ atomic_inc(&net->ipv4.rt_genid);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static inline int rt_genid_ipv6(struct net *net)
+{
+ return atomic_read(&net->ipv6.rt_genid);
+}
+
+static inline void rt_genid_bump_ipv6(struct net *net)
+{
+ atomic_inc(&net->ipv6.rt_genid);
+}
+#else
+static inline int rt_genid_ipv6(struct net *net)
+{
+ return 0;
+}
+
+static inline void rt_genid_bump_ipv6(struct net *net)
+{
+}
+#endif
+
+/* For callers who don't really care about whether it's IPv4 or IPv6 */
+static inline void rt_genid_bump_all(struct net *net)
+{
+ rt_genid_bump_ipv4(net);
+ rt_genid_bump_ipv6(net);
}
static inline int fnhe_genid(struct net *net)
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 2ba9de89e8e..bf2ec2202c5 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -77,5 +77,6 @@ struct netns_ipv4 {
struct fib_rules_ops *mr_rules_ops;
#endif
#endif
+ atomic_t rt_genid;
};
#endif
diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index 005e2c2e39a..0fb2401197c 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -72,6 +72,7 @@ struct netns_ipv6 {
#endif
#endif
atomic_t dev_addr_genid;
+ atomic_t rt_genid;
};
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)