netfilter: nft_socket: fix build with CONFIG_SOCK_CGROUP_DATA=n

In some configurations, the sock_cgroup_ptr() function is not available:

net/netfilter/nft_socket.c: In function 'nft_sock_get_eval_cgroupv2':
net/netfilter/nft_socket.c:47:16: error: implicit declaration of function 'sock_cgroup_ptr'; did you mean 'obj_cgroup_put'? [-Werror=implicit-function-declaration]
   47 |         cgrp = sock_cgroup_ptr(&sk->sk_cgrp_data);
      |                ^~~~~~~~~~~~~~~
      |                obj_cgroup_put
net/netfilter/nft_socket.c:47:14: error: assignment to 'struct cgroup *' from 'int' makes pointer from integer without a cast [-Werror=int-conversion]
   47 |         cgrp = sock_cgroup_ptr(&sk->sk_cgrp_data);
      |              ^

Change the caller to match the same #ifdef check, only calling it
when the function is defined.

Fixes: e0bb96db96f8 ("netfilter: nft_socket: add support for cgroupsv2")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nft_socket.c b/net/netfilter/nft_socket.c
index f9c5ff6..d601974 100644 (file)
--- a/net/netfilter/nft_socket.c
+++ b/net/netfilter/nft_socket.c
@@ -34,7 +34,7 @@ static void nft_socket_wildcard(const struct nft_pktinfo *pkt,
        }
 }
 
-#ifdef CONFIG_CGROUPS
+#ifdef CONFIG_SOCK_CGROUP_DATA
 static noinline bool
 nft_sock_get_eval_cgroupv2(u32 *dest, const struct nft_pktinfo *pkt, u32 level)
 {
@@ -106,7 +106,7 @@ static void nft_socket_eval(const struct nft_expr *expr,
                }
                nft_socket_wildcard(pkt, regs, sk, dest);
                break;
-#ifdef CONFIG_CGROUPS
+#ifdef CONFIG_SOCK_CGROUP_DATA
        case NFT_SOCKET_CGROUPV2:
                if (!nft_sock_get_eval_cgroupv2(dest, pkt, priv->level)) {
                        regs->verdict.code = NFT_BREAK;