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authorHerbert Xu <herbert@gondor.apana.org.au>2007-10-09 04:25:08 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-11 03:54:54 +0400
commit83815dea47cf3e98ccbb6aecda08cba1ba91208f (patch)
tree6d728f3b26dc02685ec6c8eb5c08605adf9d2688 /net/xfrm/xfrm_output.c
parent406ef77c893ebd882209be4e393d64b01fe72054 (diff)
downloadlinux-83815dea47cf3e98ccbb6aecda08cba1ba91208f.tar.xz
[IPSEC]: Move xfrm_state_check into xfrm_output.c
The functions xfrm_state_check and xfrm_state_check_space are only used by the output code in xfrm_output.c so we can move them over. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm/xfrm_output.c')
-rw-r--r--net/xfrm/xfrm_output.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 75f289b488a7..5b1c978a323c 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -18,6 +18,28 @@
#include <net/dst.h>
#include <net/xfrm.h>
+static int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb)
+{
+ int nhead = x->props.header_len + LL_RESERVED_SPACE(skb->dst->dev)
+ - skb_headroom(skb);
+
+ if (nhead > 0)
+ return pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
+
+ /* Check tail too... */
+ return 0;
+}
+
+static int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb)
+{
+ int err = xfrm_state_check_expire(x);
+ if (err < 0)
+ goto err;
+ err = xfrm_state_check_space(x, skb);
+err:
+ return err;
+}
+
int xfrm_output(struct sk_buff *skb)
{
struct dst_entry *dst = skb->dst;