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authorFan Du <fan.du@windriver.com>2014-01-03 07:18:32 +0400
committerSteffen Klassert <steffen.klassert@secunet.com>2014-01-03 10:29:12 +0400
commitc454997e68eb013510ba128283ad3b4aefeff630 (patch)
treec32cd7284c1e831c84aa962bced9fb0d816b5c51 /net/xfrm/xfrm_state.c
parentcf93d47ed4489cc349678f397290b3ecba868a3b (diff)
downloadlinux-c454997e68eb013510ba128283ad3b4aefeff630.tar.xz
{pktgen, xfrm} Introduce xfrm_state_lookup_byspi for pktgen
Introduce xfrm_state_lookup_byspi to find user specified by custom from "pgset spi xxx". Using this scheme, any flow regardless its saddr/daddr could be transform by SA specified with configurable spi. Signed-off-by: Fan Du <fan.du@windriver.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm/xfrm_state.c')
-rw-r--r--net/xfrm/xfrm_state.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 300744094ad8..62181486ead8 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -915,6 +915,28 @@ xfrm_stateonly_find(struct net *net, u32 mark,
}
EXPORT_SYMBOL(xfrm_stateonly_find);
+struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
+ unsigned short family)
+{
+ struct xfrm_state *x;
+ struct xfrm_state_walk *w;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ list_for_each_entry(w, &net->xfrm.state_all, all) {
+ x = container_of(w, struct xfrm_state, km);
+ if (x->props.family != family ||
+ x->id.spi != spi)
+ continue;
+
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ xfrm_state_hold(x);
+ return x;
+ }
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_state_lookup_byspi);
+
static void __xfrm_state_insert(struct xfrm_state *x)
{
struct net *net = xs_net(x);