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authorSteffen Klassert <steffen.klassert@secunet.com>2013-02-11 07:02:36 +0100
committerSteffen Klassert <steffen.klassert@secunet.com>2013-02-11 14:07:01 +0100
commit7cb8a93968e395e40a72a50da0b6114e752304b4 (patch)
tree2d2ab4468555120fb04b86097fce9e31b584154f /net/xfrm
parent8d068875caca3b507ffa8a57d521483fd4eebcc7 (diff)
downloadvexpress-lsk-7cb8a93968e395e40a72a50da0b6114e752304b4.tar.gz
xfrm: Allow inserting policies with matching mark and different priorities
We currently can not insert policies with mark and mask such that some flows would be matched from both policies. We make this possible when the priority of these policies are different. If both policies match a flow, the one with the higher priority is used. Reported-by: Emmanuel Thierry <emmanuel.thierry@telecom-bretagne.eu> Reported-by: Romain Kuntz <r.kuntz@ipflavors.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_policy.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 456b11b0f04..257dfb18aef 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -607,6 +607,21 @@ static void xfrm_policy_requeue(struct xfrm_policy *old,
spin_unlock_bh(&pq->hold_queue.lock);
}
+static bool xfrm_policy_mark_match(struct xfrm_policy *policy,
+ struct xfrm_policy *pol)
+{
+ u32 mark = policy->mark.v & policy->mark.m;
+
+ if (policy->mark.v == pol->mark.v && policy->mark.m == pol->mark.m)
+ return true;
+
+ if ((mark & pol->mark.m) == pol->mark.v &&
+ policy->priority == pol->priority)
+ return true;
+
+ return false;
+}
+
int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
{
struct net *net = xp_net(policy);
@@ -614,7 +629,6 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
struct xfrm_policy *delpol;
struct hlist_head *chain;
struct hlist_node *entry, *newpos;
- u32 mark = policy->mark.v & policy->mark.m;
write_lock_bh(&xfrm_policy_lock);
chain = policy_hash_bysel(net, &policy->selector, policy->family, dir);
@@ -623,7 +637,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
hlist_for_each_entry(pol, entry, chain, bydst) {
if (pol->type == policy->type &&
!selector_cmp(&pol->selector, &policy->selector) &&
- (mark & pol->mark.m) == pol->mark.v &&
+ xfrm_policy_mark_match(policy, pol) &&
xfrm_sec_ctx_match(pol->security, policy->security) &&
!WARN_ON(delpol)) {
if (excl) {