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[IPSEC]: Perform SA switchover immediately. 

When we insert a new xfrm_state which potentially
subsumes an existing one, make sure all cached
bundles are flushed so that the new SA is used
immediately.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2005-12-19 14:23:23 -08:00
parent 9e999993c7
commit 399c180ac5
3 changed files with 20 additions and 5 deletions
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1
include/net/xfrm.h
View File

@ -890,6 +890,7 @@ struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
extern void xfrm_policy_flush(void);
extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
extern int xfrm_flush_bundles(void);
extern void xfrm_flush_all_bundles(void);
extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family);
extern void xfrm_init_pmtu(struct dst_entry *dst);

19
net/xfrm/xfrm_policy.c
View File

@ -1014,13 +1014,12 @@ int __xfrm_route_forward(struct sk_buff *skb, unsigned short family)
}
EXPORT_SYMBOL(__xfrm_route_forward);
/* Optimize later using cookies and generation ids. */
static struct dst_entry *xfrm_dst_check(struct dst_entry *dst, u32 cookie)
{
if (!stale_bundle(dst))
return dst;
/* If it is marked obsolete, which is how we even get here,
* then we have purged it from the policy bundle list and we
* did that for a good reason.
*/
return NULL;
}
@ -1104,6 +1103,16 @@ int xfrm_flush_bundles(void)
return 0;
}
static int always_true(struct dst_entry *dst)
{
return 1;
}
void xfrm_flush_all_bundles(void)
{
xfrm_prune_bundles(always_true);
}
void xfrm_init_pmtu(struct dst_entry *dst)
{
do {

5
net/xfrm/xfrm_state.c
View File

@ -431,6 +431,8 @@ void xfrm_state_insert(struct xfrm_state *x)
spin_lock_bh(&xfrm_state_lock);
__xfrm_state_insert(x);
spin_unlock_bh(&xfrm_state_lock);
xfrm_flush_all_bundles();
}
EXPORT_SYMBOL(xfrm_state_insert);
@ -478,6 +480,9 @@ out:
spin_unlock_bh(&xfrm_state_lock);
xfrm_state_put_afinfo(afinfo);
if (!err)
xfrm_flush_all_bundles();
if (x1) {
xfrm_state_delete(x1);
xfrm_state_put(x1);