IPVS: Allow compilation with CONFIG_SYSCTL disabled

This is a rather naieve approach to allowing PVS to compile with
CONFIG_SYSCTL disabled.  I am working on a more comprehensive patch which
will remove compilation of all sysctl-related IPVS code when CONFIG_SYSCTL
is disabled.

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Tested-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index d7c2fa8..c73b0c8 100644 (file)
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -3552,10 +3552,15 @@ int __net_init __ip_vs_control_init(struct net *net)
        tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
 
 
+#ifdef CONFIG_SYSCTL
        ipvs->sysctl_hdr = register_net_sysctl_table(net, net_vs_ctl_path,
                                                     tbl);
-       if (ipvs->sysctl_hdr == NULL)
-               goto err_reg;
+       if (ipvs->sysctl_hdr == NULL) {
+               if (!net_eq(net, &init_net))
+                       kfree(tbl);
+               goto err_dup;
+       }
+#endif
        ip_vs_new_estimator(net, ipvs->tot_stats);
        ipvs->sysctl_tbl = tbl;
        /* Schedule defense work */
@@ -3563,9 +3568,6 @@ int __net_init __ip_vs_control_init(struct net *net)
        schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
        return 0;
 
-err_reg:
-       if (!net_eq(net, &init_net))
-               kfree(tbl);
 err_dup:
        free_percpu(ipvs->cpustats);
 err_alloc:
@@ -3581,7 +3583,9 @@ static void __net_exit __ip_vs_control_cleanup(struct net *net)
        ip_vs_kill_estimator(net, ipvs->tot_stats);
        cancel_delayed_work_sync(&ipvs->defense_work);
        cancel_work_sync(&ipvs->defense_work.work);
+#ifdef CONFIG_SYSCTL
        unregister_net_sysctl_table(ipvs->sysctl_hdr);
+#endif
        proc_net_remove(net, "ip_vs_stats_percpu");
        proc_net_remove(net, "ip_vs_stats");
        proc_net_remove(net, "ip_vs");

diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index d5bec33..00b5ffa 100644 (file)
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -554,33 +554,33 @@ static int __net_init __ip_vs_lblc_init(struct net *net)
                                                sizeof(vs_vars_table),
                                                GFP_KERNEL);
                if (ipvs->lblc_ctl_table == NULL)
-                       goto err_dup;
+                       return -ENOMEM;
        } else
                ipvs->lblc_ctl_table = vs_vars_table;
        ipvs->sysctl_lblc_expiration = 24*60*60*HZ;
        ipvs->lblc_ctl_table[0].data = &ipvs->sysctl_lblc_expiration;
 
+#ifdef CONFIG_SYSCTL
        ipvs->lblc_ctl_header =
                register_net_sysctl_table(net, net_vs_ctl_path,
                                          ipvs->lblc_ctl_table);
-       if (!ipvs->lblc_ctl_header)
-               goto err_reg;
+       if (!ipvs->lblc_ctl_header) {
+               if (!net_eq(net, &init_net))
+                       kfree(ipvs->lblc_ctl_table);
+               return -ENOMEM;
+       }
+#endif
 
        return 0;
-
-err_reg:
-       if (!net_eq(net, &init_net))
-               kfree(ipvs->lblc_ctl_table);
-
-err_dup:
-       return -ENOMEM;
 }
 
 static void __net_exit __ip_vs_lblc_exit(struct net *net)
 {
        struct netns_ipvs *ipvs = net_ipvs(net);
 
+#ifdef CONFIG_SYSCTL
        unregister_net_sysctl_table(ipvs->lblc_ctl_header);
+#endif
 
        if (!net_eq(net, &init_net))
                kfree(ipvs->lblc_ctl_table);

diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
index 61ae8cf..bfa25f1 100644 (file)
--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -754,33 +754,33 @@ static int __net_init __ip_vs_lblcr_init(struct net *net)
                                                sizeof(vs_vars_table),
                                                GFP_KERNEL);
                if (ipvs->lblcr_ctl_table == NULL)
-                       goto err_dup;
+                       return -ENOMEM;
        } else
                ipvs->lblcr_ctl_table = vs_vars_table;
        ipvs->sysctl_lblcr_expiration = 24*60*60*HZ;
        ipvs->lblcr_ctl_table[0].data = &ipvs->sysctl_lblcr_expiration;
 
+#ifdef CONFIG_SYSCTL
        ipvs->lblcr_ctl_header =
                register_net_sysctl_table(net, net_vs_ctl_path,
                                          ipvs->lblcr_ctl_table);
-       if (!ipvs->lblcr_ctl_header)
-               goto err_reg;
+       if (!ipvs->lblcr_ctl_header) {
+               if (!net_eq(net, &init_net))
+                       kfree(ipvs->lblcr_ctl_table);
+               return -ENOMEM;
+       }
+#endif
 
        return 0;
-
-err_reg:
-       if (!net_eq(net, &init_net))
-               kfree(ipvs->lblcr_ctl_table);
-
-err_dup:
-       return -ENOMEM;
 }
 
 static void __net_exit __ip_vs_lblcr_exit(struct net *net)
 {
        struct netns_ipvs *ipvs = net_ipvs(net);
 
+#ifdef CONFIG_SYSCTL
        unregister_net_sysctl_table(ipvs->lblcr_ctl_header);
+#endif
 
        if (!net_eq(net, &init_net))
                kfree(ipvs->lblcr_ctl_table);