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authorDavid Ahern <dsahern@gmail.com>2017-05-28 01:19:30 +0300
committerDavid S. Miller <davem@davemloft.net>2017-05-30 18:55:32 +0300
commitb7b386f42f079b25b942c756820e36c6bd09b2ca (patch)
tree09e88d5823b597524f2df3dcbcde47bdf39a55b7 /net/mpls
parenta1f10abe12b6d70f8b02dedccb48c9d234a57b67 (diff)
downloadlinux-b7b386f42f079b25b942c756820e36c6bd09b2ca.tar.xz
net: mpls: Pull common label check into helper
mpls_route_add and mpls_route_del have the same checks on the label. Move to a helper. Avoid duplicate extack messages in the next patch. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mpls')
-rw-r--r--net/mpls/af_mpls.c32
1 files changed, 17 insertions, 15 deletions
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index f3830951fb1c..726eafecc793 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -856,6 +856,19 @@ errout:
return err;
}
+static bool mpls_label_ok(struct net *net, unsigned int index)
+{
+ /* Reserved labels may not be set */
+ if (index < MPLS_LABEL_FIRST_UNRESERVED)
+ return false;
+
+ /* The full 20 bit range may not be supported. */
+ if (index >= net->mpls.platform_labels)
+ return false;
+
+ return true;
+}
+
static int mpls_route_add(struct mpls_route_config *cfg)
{
struct mpls_route __rcu **platform_label;
@@ -875,12 +888,7 @@ static int mpls_route_add(struct mpls_route_config *cfg)
index = find_free_label(net);
}
- /* Reserved labels may not be set */
- if (index < MPLS_LABEL_FIRST_UNRESERVED)
- goto errout;
-
- /* The full 20 bit range may not be supported. */
- if (index >= net->mpls.platform_labels)
+ if (!mpls_label_ok(net, index))
goto errout;
/* Append makes no sense with mpls */
@@ -952,12 +960,7 @@ static int mpls_route_del(struct mpls_route_config *cfg)
index = cfg->rc_label;
- /* Reserved labels may not be removed */
- if (index < MPLS_LABEL_FIRST_UNRESERVED)
- goto errout;
-
- /* The full 20 bit range may not be supported */
- if (index >= net->mpls.platform_labels)
+ if (!mpls_label_ok(net, index))
goto errout;
mpls_route_update(net, index, NULL, &cfg->rc_nlinfo);
@@ -1735,10 +1738,9 @@ static int rtm_to_route_config(struct sk_buff *skb, struct nlmsghdr *nlh,
&cfg->rc_label, NULL))
goto errout;
- /* Reserved labels may not be set */
- if (cfg->rc_label < MPLS_LABEL_FIRST_UNRESERVED)
+ if (!mpls_label_ok(cfg->rc_nlinfo.nl_net,
+ cfg->rc_label))
goto errout;
-
break;
}
case RTA_VIA: