From 628529b6ee334fedc8d25ce56205bb99566572b9 Mon Sep 17 00:00:00 2001 From: Jamal Hadi Salim Date: Mon, 2 Jul 2007 22:41:14 -0700 Subject: [PATCH] [XFRM] Introduce standalone SAD lookup This allows other in-kernel functions to do SAD lookups. The only known user at the moment is pktgen. Signed-off-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- include/net/xfrm.h | 4 ++++ net/xfrm/xfrm_state.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index ee3827f053..d3a898b18f 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -928,6 +928,10 @@ extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t struct flowi *fl, struct xfrm_tmpl *tmpl, struct xfrm_policy *pol, int *err, unsigned short family); +extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, + xfrm_address_t *saddr, + unsigned short family, + u8 mode, u8 proto, u32 reqid); extern int xfrm_state_check_expire(struct xfrm_state *x); extern void xfrm_state_insert(struct xfrm_state *x); extern int xfrm_state_add(struct xfrm_state *x); diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index dfacb9c2a6..e070c3f938 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; -- 2.39.5