[IPSEC]: Add xfrm_init_state

This patch adds xfrm_init_state which is simply a wrapper that calls
xfrm_get_type and subsequently x->type->init_state.  It also gets rid
of the unused args argument.

Abstracting it out allows us to add common initialisation code, e.g.,
to set family-specific flags.

The add_time setting in xfrm_user.c was deleted because it's already
set by xfrm_state_alloc.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: James Morris <jmorris@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 2537f26f097c..1845b73d69f9 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1055,6 +1055,27 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu)
 }
 
 EXPORT_SYMBOL(xfrm_state_mtu);
+
+int xfrm_init_state(struct xfrm_state *x)
+{
+        int err;
+
+        err = -ENOENT;
+        x->type = xfrm_get_type(x->id.proto, x->props.family);
+        if (x->type == NULL)
+                goto error;
+
+        err = x->type->init_state(x);
+        if (err)
+                goto error;
+
+        x->km.state = XFRM_STATE_VALID;
+
+error:
+        return err;
+}
+
+EXPORT_SYMBOL(xfrm_init_state);
  
 void __init xfrm_state_init(void)
 {