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[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 <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jamal Hadi Salim 2007-07-02 22:41:14 -07:00 committed by David S. Miller
parent 007a531b0a
commit 628529b6ee
2 changed files with 35 additions and 0 deletions
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4
include/net/xfrm.h
View File

@ -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);

31
net/xfrm/xfrm_state.c
View File

@ -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;