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authorSteffen Klassert <steffen.klassert@secunet.com>2011-03-28 19:46:39 +0000
committerDavid S. Miller <davem@davemloft.net>2011-03-28 23:34:52 -0700
commitaf2f464e326ebad57284cfdecb03f1606e89bbc7 (patch)
tree0b9f1e9918a47f49e1454a0df5e045a0d627050d /include/net/xfrm.h
parent36ae0148dbb6b9e15d8f067bb7523fd2b765a6af (diff)
downloadlinux-af2f464e326ebad57284cfdecb03f1606e89bbc7.tar.gz
xfrm: Assign esn pointers when cloning a state
When we clone a xfrm state we have to assign the replay_esn and the preplay_esn pointers to the state if we use the new replay detection method. To this end, we add a xfrm_replay_clone() function that allocates memory for the replay detection and takes over the necessary values from the original state. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/xfrm.h')
-rw-r--r--include/net/xfrm.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index cffa5dc6644..6ae4bc5ce8a 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1601,6 +1601,28 @@ static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay
}
#ifdef CONFIG_XFRM_MIGRATE
+static inline int xfrm_replay_clone(struct xfrm_state *x,
+ struct xfrm_state *orig)
+{
+ x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
+ GFP_KERNEL);
+ if (!x->replay_esn)
+ return -ENOMEM;
+
+ x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
+ x->replay_esn->replay_window = orig->replay_esn->replay_window;
+
+ x->preplay_esn = kmemdup(x->replay_esn,
+ xfrm_replay_state_esn_len(x->replay_esn),
+ GFP_KERNEL);
+ if (!x->preplay_esn) {
+ kfree(x->replay_esn);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
{
return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);