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Commit 1a1ccc96 authored by Steffen Klassert's avatar Steffen Klassert
Browse files

xfrm: Remove caching of xfrm_policy_sk_bundles 



We currently cache socket policy bundles at xfrm_policy_sk_bundles.
These cached bundles are never used. Instead we create and cache
a new one whenever xfrm_lookup() is called on a socket policy.

Most protocols cache the used routes to the socket, so let's
remove the unused caching of socket policy bundles in xfrm.

Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
parent d3623099

include/net/netns/xfrm.h

+0 −1
Original line number Diff line number Diff line
@@ -59,7 +59,6 @@ struct netns_xfrm { 
	struct dst_ops		xfrm6_dst_ops;

#endif

	spinlock_t xfrm_state_lock;

	spinlock_t xfrm_policy_sk_bundle_lock;

	rwlock_t xfrm_policy_lock;

	struct mutex xfrm_cfg_mutex;

net/xfrm/xfrm_policy.c

+0 −28
Original line number Diff line number Diff line
@@ -39,8 +39,6 @@ 
#define XFRM_QUEUE_TMO_MAX ((unsigned)(60*HZ))

#define XFRM_MAX_QUEUE_LEN	100



static struct dst_entry *xfrm_policy_sk_bundles;



static DEFINE_SPINLOCK(xfrm_policy_afinfo_lock);

static struct xfrm_policy_afinfo __rcu *xfrm_policy_afinfo[NPROTO]

						__read_mostly;
@@ -2109,13 +2107,6 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig, 
				goto no_transform;

			}



			dst_hold(&xdst->u.dst);



			spin_lock_bh(&net->xfrm.xfrm_policy_sk_bundle_lock);

			xdst->u.dst.next = xfrm_policy_sk_bundles;

			xfrm_policy_sk_bundles = &xdst->u.dst;

			spin_unlock_bh(&net->xfrm.xfrm_policy_sk_bundle_lock);



			route = xdst->route;

		}

	}
@@ -2549,33 +2540,15 @@ static struct dst_entry *xfrm_negative_advice(struct dst_entry *dst) 
	return dst;

}



static void __xfrm_garbage_collect(struct net *net)

{

	struct dst_entry *head, *next;



	spin_lock_bh(&net->xfrm.xfrm_policy_sk_bundle_lock);

	head = xfrm_policy_sk_bundles;

	xfrm_policy_sk_bundles = NULL;

	spin_unlock_bh(&net->xfrm.xfrm_policy_sk_bundle_lock);



	while (head) {

		next = head->next;

		dst_free(head);

		head = next;

	}

}



void xfrm_garbage_collect(struct net *net)

{

	flow_cache_flush(net);

	__xfrm_garbage_collect(net);

}

EXPORT_SYMBOL(xfrm_garbage_collect);



static void xfrm_garbage_collect_deferred(struct net *net)

{

	flow_cache_flush_deferred(net);

	__xfrm_garbage_collect(net);

}



static void xfrm_init_pmtu(struct dst_entry *dst)
@@ -2944,7 +2917,6 @@ static int __net_init xfrm_net_init(struct net *net) 
	/* Initialize the per-net locks here */

	spin_lock_init(&net->xfrm.xfrm_state_lock);

	rwlock_init(&net->xfrm.xfrm_policy_lock);

	spin_lock_init(&net->xfrm.xfrm_policy_sk_bundle_lock);

	mutex_init(&net->xfrm.xfrm_cfg_mutex);



	flow_cache_init(net);