xfrm: SP lookups with mark
Jamal Hadi Salim [Mon, 22 Feb 2010 11:32:58 +0000 (11:32 +0000)]
Allow mark to be used when doing SP lookup

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/xfrm/xfrm_policy.c

index e67d3ca..2a6e646 100644 (file)
@@ -556,6 +556,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
        struct hlist_head *chain;
        struct hlist_node *entry, *newpos;
        struct dst_entry *gc_list;
+       u32 mark = policy->mark.v & policy->mark.m;
 
        write_lock_bh(&xfrm_policy_lock);
        chain = policy_hash_bysel(net, &policy->selector, policy->family, dir);
@@ -564,6 +565,7 @@ 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_sec_ctx_match(pol->security, policy->security) &&
                    !WARN_ON(delpol)) {
                        if (excl) {
@@ -650,6 +652,7 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u8 type,
        ret = NULL;
        hlist_for_each_entry(pol, entry, chain, bydst) {
                if (pol->type == type &&
+                   (mark & pol->mark.m) == pol->mark.v &&
                    !selector_cmp(sel, &pol->selector) &&
                    xfrm_sec_ctx_match(ctx, pol->security)) {
                        xfrm_pol_hold(pol);
@@ -692,7 +695,8 @@ struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8 type,
        chain = net->xfrm.policy_byidx + idx_hash(net, id);
        ret = NULL;
        hlist_for_each_entry(pol, entry, chain, byidx) {
-               if (pol->type == type && pol->index == id) {
+               if (pol->type == type && pol->index == id &&
+                   (mark & pol->mark.m) == pol->mark.v) {
                        xfrm_pol_hold(pol);
                        if (delete) {
                                *err = security_xfrm_policy_delete(
@@ -916,6 +920,7 @@ static int xfrm_policy_match(struct xfrm_policy *pol, struct flowi *fl,
        int match, ret = -ESRCH;
 
        if (pol->family != family ||
+           (fl->mark & pol->mark.m) != pol->mark.v ||
            pol->type != type)
                return ret;
 
@@ -1040,6 +1045,10 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struc
                int err = 0;
 
                if (match) {
+                       if ((sk->sk_mark & pol->mark.m) != pol->mark.v) {
+                               pol = NULL;
+                               goto out;
+                       }
                        err = security_xfrm_policy_lookup(pol->security,
                                                      fl->secid,
                                                      policy_to_flow_dir(dir));
@@ -1052,6 +1061,7 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struc
                } else
                        pol = NULL;
        }
+out:
        read_unlock_bh(&xfrm_policy_lock);
        return pol;
 }