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linux-sg2042
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[XFRM]: Do not flush all bundles on SA insert. 

Instead, simply set all potentially aliasing existing xfrm_state
objects to have the current generation counter value.

This will make routes get relooked up the next time an existing
route mentioning these aliased xfrm_state objects gets used,
via xfrm_dst_check().

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2006-08-24 03:29:04 -07:00
parent 2575b65434
commit c7f5ea3a4d
3 changed files with 20 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/xfrm.h
View File

@ -996,7 +996,6 @@ struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
extern void xfrm_policy_flush(u8 type);
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, int strict);
extern void xfrm_init_pmtu(struct dst_entry *dst);

10
net/xfrm/xfrm_policy.c
View File

@ -1478,16 +1478,6 @@ 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 {

25
net/xfrm/xfrm_state.c
View File

@ -761,13 +761,30 @@ static void __xfrm_state_insert(struct xfrm_state *x)
schedule_work(&xfrm_hash_work);
}
/* xfrm_state_lock is held */
static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
{
unsigned short family = xnew->props.family;
u32 reqid = xnew->props.reqid;
struct xfrm_state *x;
struct hlist_node *entry;
unsigned int h;
h = xfrm_dst_hash(&xnew->id.daddr, reqid, family);
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
if (x->props.family == family &&
x->props.reqid == reqid &&
!xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family))
x->genid = xfrm_state_genid;
}
}
void xfrm_state_insert(struct xfrm_state *x)
{
spin_lock_bh(&xfrm_state_lock);
__xfrm_state_bump_genids(x);
__xfrm_state_insert(x);
spin_unlock_bh(&xfrm_state_lock);
xfrm_flush_all_bundles();
}
EXPORT_SYMBOL(xfrm_state_insert);
@ -889,15 +906,13 @@ int xfrm_state_add(struct xfrm_state *x)
x->id.proto,
&x->id.daddr, &x->props.saddr, 0);
__xfrm_state_bump_genids(x);
__xfrm_state_insert(x);
err = 0;
out:
spin_unlock_bh(&xfrm_state_lock);
if (!err)
xfrm_flush_all_bundles();
if (x1) {
xfrm_state_delete(x1);
xfrm_state_put(x1);