diff options
| author | David Ahern <dsahern@gmail.com> | 2017-05-27 16:19:30 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-30 11:55:32 -0400 |
| commit | b7b386f42f079b25b942c756820e36c6bd09b2ca (patch) | |
| tree | 09e88d5823b597524f2df3dcbcde47bdf39a55b7 /net | |
| parent | a1f10abe12b6d70f8b02dedccb48c9d234a57b67 (diff) | |
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')
| -rw-r--r-- | net/mpls/af_mpls.c | 32 |
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: |