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authorAlexey Dobriyan <adobriyan@gmail.com>2010-01-24 22:47:53 -0800
committerDavid S. Miller <davem@davemloft.net>2010-01-24 22:47:53 -0800
commitd7c7544c3d5f59033d1bf3236bc7b289f5f26b75 (patch)
tree1a3c9e7b6c0c9158ddb73faa05b07697c3493cf1 /net/ipv4
parenta40ccc6868943e74ec12f26a266ce1d0373b2b32 (diff)
netns xfrm: deal with dst entries in netns
GC is non-existent in netns, so after you hit GC threshold, no new dst entries will be created until someone triggers cleanup in init_net. Make xfrm4_dst_ops and xfrm6_dst_ops per-netns. This is not done in a generic way, because it woule waste (AF_MAX - 2) * sizeof(struct dst_ops) bytes per-netns. Reorder GC threshold initialization so it'd be done before registering XFRM policies. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/xfrm4_policy.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 8c08a28d8f83..67107d63c1cd 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -15,7 +15,6 @@
#include <net/xfrm.h>
#include <net/ip.h>
-static struct dst_ops xfrm4_dst_ops;
static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
@@ -190,8 +189,10 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
static inline int xfrm4_garbage_collect(struct dst_ops *ops)
{
- xfrm4_policy_afinfo.garbage_collect(&init_net);
- return (atomic_read(&xfrm4_dst_ops.entries) > xfrm4_dst_ops.gc_thresh*2);
+ struct net *net = container_of(ops, struct net, xfrm.xfrm4_dst_ops);
+
+ xfrm4_policy_afinfo.garbage_collect(net);
+ return (atomic_read(&ops->entries) > ops->gc_thresh * 2);
}
static void xfrm4_update_pmtu(struct dst_entry *dst, u32 mtu)
@@ -268,7 +269,7 @@ static struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
static struct ctl_table xfrm4_policy_table[] = {
{
.procname = "xfrm4_gc_thresh",
- .data = &xfrm4_dst_ops.gc_thresh,
+ .data = &init_net.xfrm.xfrm4_dst_ops.gc_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
@@ -295,8 +296,6 @@ static void __exit xfrm4_policy_fini(void)
void __init xfrm4_init(int rt_max_size)
{
- xfrm4_state_init();
- xfrm4_policy_init();
/*
* Select a default value for the gc_thresh based on the main route
* table hash size. It seems to me the worst case scenario is when
@@ -308,6 +307,9 @@ void __init xfrm4_init(int rt_max_size)
* and start cleaning when were 1/2 full
*/
xfrm4_dst_ops.gc_thresh = rt_max_size/2;
+
+ xfrm4_state_init();
+ xfrm4_policy_init();
#ifdef CONFIG_SYSCTL
sysctl_hdr = register_net_sysctl_table(&init_net, net_ipv4_ctl_path,
xfrm4_policy_table);