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Diffstat (limited to 'net/xfrm/xfrm_state.c')
-rw-r--r--net/xfrm/xfrm_state.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index dfacb9c2a6e..e070c3f938f 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -686,6 +686,37 @@ out:
return x;
}
+struct xfrm_state *
+xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
+ unsigned short family, u8 mode, u8 proto, u32 reqid)
+{
+ unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family);
+ struct xfrm_state *rx = NULL, *x = NULL;
+ struct hlist_node *entry;
+
+ spin_lock(&xfrm_state_lock);
+ hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
+ if (x->props.family == family &&
+ x->props.reqid == reqid &&
+ !(x->props.flags & XFRM_STATE_WILDRECV) &&
+ xfrm_state_addr_check(x, daddr, saddr, family) &&
+ mode == x->props.mode &&
+ proto == x->id.proto &&
+ x->km.state == XFRM_STATE_VALID) {
+ rx = x;
+ break;
+ }
+ }
+
+ if (rx)
+ xfrm_state_hold(rx);
+ spin_unlock(&xfrm_state_lock);
+
+
+ return rx;
+}
+EXPORT_SYMBOL(xfrm_stateonly_find);
+
static void __xfrm_state_insert(struct xfrm_state *x)
{
unsigned int h;