net: psample: fix build error when CONFIG_INET is not enabled

Fix psample build error when CONFIG_INET is not set/enabled by
bracketing the tunnel code in #ifdef CONFIG_NET / #endif.

../net/psample/psample.c: In function ‘__psample_ip_tun_to_nlattr’:
../net/psample/psample.c:216:25: error: implicit declaration of function ‘ip_tunnel_info_opts’; did you mean ‘ip_tunnel_info_opts_set’? [-Werror=implicit-function-declaration]

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Yotam Gigi <yotam.gi@gmail.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/psample/psample.c b/net/psample/psample.c
index 34a7404..a042261 100644 (file)
--- a/net/psample/psample.c
+++ b/net/psample/psample.c
@@ -209,6 +209,7 @@ void psample_group_put(struct psample_group *group)
 }
 EXPORT_SYMBOL_GPL(psample_group_put);
 
+#ifdef CONFIG_INET
 static int __psample_ip_tun_to_nlattr(struct sk_buff *skb,
                              struct ip_tunnel_info *tun_info)
 {
@@ -352,12 +353,15 @@ static int psample_tunnel_meta_len(struct ip_tunnel_info *tun_info)
 
        return sum;
 }
+#endif
 
 void psample_sample_packet(struct psample_group *group, struct sk_buff *skb,
                           u32 trunc_size, int in_ifindex, int out_ifindex,
                           u32 sample_rate)
 {
+#ifdef CONFIG_INET
        struct ip_tunnel_info *tun_info;
+#endif
        struct sk_buff *nl_skb;
        int data_len;
        int meta_len;
@@ -371,9 +375,11 @@ void psample_sample_packet(struct psample_group *group, struct sk_buff *skb,
                   nla_total_size(sizeof(u32)) +        /* group_num */
                   nla_total_size(sizeof(u32));         /* seq */
 
+#ifdef CONFIG_INET
        tun_info = skb_tunnel_info(skb);
        if (tun_info)
                meta_len += psample_tunnel_meta_len(tun_info);
+#endif
 
        data_len = min(skb->len, trunc_size);
        if (meta_len + nla_total_size(data_len) > PSAMPLE_MAX_PACKET_SIZE)
@@ -429,11 +435,13 @@ void psample_sample_packet(struct psample_group *group, struct sk_buff *skb,
                        goto error;
        }
 
+#ifdef CONFIG_INET
        if (tun_info) {
                ret = psample_ip_tun_to_nlattr(nl_skb, tun_info);
                if (unlikely(ret < 0))
                        goto error;
        }
+#endif
 
        genlmsg_end(nl_skb, data);
        genlmsg_multicast_netns(&psample_nl_family, group->net, nl_skb, 0,