Commit b7b386f4 authored by David Ahern's avatar David Ahern Committed by David S. Miller

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: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a1f10abe
......@@ -856,6 +856,19 @@ static int mpls_nh_build_multi(struct mpls_route_config *cfg,
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:
......
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