netfilter: {ipt,ebt}_ULOG: rise warning on deprecation

This target has been superseded by NFLOG. Spot a warning
so we prepare removal in a couple of years.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Gao feng <gaofeng@cn.fujitsu.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index fc1905c51417..2ec6c19ff903 100644
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -267,6 +267,12 @@ static int ebt_ulog_tg_check(const struct xt_tgchk_param *par)
 {
         struct ebt_ulog_info *uloginfo = par->targinfo;
 
+        if (!par->net->xt.ebt_ulog_warn_deprecated) {
+                pr_info("ebt_ulog is deprecated and it will be removed soon, "
+                        "use ebt_nflog instead\n");
+                par->net->xt.ebt_ulog_warn_deprecated = true;
+        }
+
         if (uloginfo->nlgroup > 31)
                 return -EINVAL;