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Diffstat (limited to 'net/xfrm/xfrm_policy.c')
-rw-r--r--net/xfrm/xfrm_policy.c71
1 files changed, 35 insertions, 36 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index f02b1743b239..2f57722f5d03 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1360,36 +1360,29 @@ xfrm_tmpl_resolve_one(struct xfrm_policy *policy, const struct flowi *fl,
struct net *net = xp_net(policy);
int nx;
int i, error;
- xfrm_address_t *daddr = xfrm_flowi_daddr(fl, family);
- xfrm_address_t *saddr = xfrm_flowi_saddr(fl, family);
xfrm_address_t tmp;
for (nx = 0, i = 0; i < policy->xfrm_nr; i++) {
struct xfrm_state *x;
- xfrm_address_t *remote = daddr;
- xfrm_address_t *local = saddr;
+ xfrm_address_t *local;
+ xfrm_address_t *remote;
struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i];
- if (tmpl->mode == XFRM_MODE_TUNNEL ||
- tmpl->mode == XFRM_MODE_BEET) {
- remote = &tmpl->id.daddr;
- local = &tmpl->saddr;
- if (xfrm_addr_any(local, tmpl->encap_family)) {
- error = xfrm_get_saddr(net, fl->flowi_oif,
- &tmp, remote,
- tmpl->encap_family, 0);
- if (error)
- goto fail;
- local = &tmp;
- }
+ remote = &tmpl->id.daddr;
+ local = &tmpl->saddr;
+ if (xfrm_addr_any(local, tmpl->encap_family)) {
+ error = xfrm_get_saddr(net, fl->flowi_oif,
+ &tmp, remote,
+ tmpl->encap_family, 0);
+ if (error)
+ goto fail;
+ local = &tmp;
}
x = xfrm_state_find(remote, local, fl, tmpl, policy, &error, family);
if (x && x->km.state == XFRM_STATE_VALID) {
xfrm[nx++] = x;
- daddr = remote;
- saddr = local;
continue;
}
if (x) {
@@ -1786,19 +1779,23 @@ void xfrm_policy_cache_flush(void)
put_online_cpus();
}
-static bool xfrm_pol_dead(struct xfrm_dst *xdst)
+static bool xfrm_xdst_can_reuse(struct xfrm_dst *xdst,
+ struct xfrm_state * const xfrm[],
+ int num)
{
- unsigned int num_pols = xdst->num_pols;
- unsigned int pol_dead = 0, i;
+ const struct dst_entry *dst = &xdst->u.dst;
+ int i;
- for (i = 0; i < num_pols; i++)
- pol_dead |= xdst->pols[i]->walk.dead;
+ if (xdst->num_xfrms != num)
+ return false;
- /* Mark DST_OBSOLETE_DEAD to fail the next xfrm_dst_check() */
- if (pol_dead)
- xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
+ for (i = 0; i < num; i++) {
+ if (!dst || dst->xfrm != xfrm[i])
+ return false;
+ dst = dst->child;
+ }
- return pol_dead;
+ return xfrm_bundle_ok(xdst);
}
static struct xfrm_dst *
@@ -1812,26 +1809,28 @@ xfrm_resolve_and_create_bundle(struct xfrm_policy **pols, int num_pols,
struct dst_entry *dst;
int err;
+ /* Try to instantiate a bundle */
+ err = xfrm_tmpl_resolve(pols, num_pols, fl, xfrm, family);
+ if (err <= 0) {
+ if (err != 0 && err != -EAGAIN)
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR);
+ return ERR_PTR(err);
+ }
+
xdst = this_cpu_read(xfrm_last_dst);
if (xdst &&
xdst->u.dst.dev == dst_orig->dev &&
xdst->num_pols == num_pols &&
- !xfrm_pol_dead(xdst) &&
memcmp(xdst->pols, pols,
sizeof(struct xfrm_policy *) * num_pols) == 0 &&
- xfrm_bundle_ok(xdst)) {
+ xfrm_xdst_can_reuse(xdst, xfrm, err)) {
dst_hold(&xdst->u.dst);
+ while (err > 0)
+ xfrm_state_put(xfrm[--err]);
return xdst;
}
old = xdst;
- /* Try to instantiate a bundle */
- err = xfrm_tmpl_resolve(pols, num_pols, fl, xfrm, family);
- if (err <= 0) {
- if (err != 0 && err != -EAGAIN)
- XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR);
- return ERR_PTR(err);
- }
dst = xfrm_bundle_create(pols[0], xfrm, err, fl, dst_orig);
if (IS_ERR(dst)) {