IPVS: Backup, adding version 0 sending capabilities

[firefly-linux-kernel-4.4.55.git] / net / netfilter / ipvs / ip_vs_ctl.c

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index a5bd0027904730b729fb5ff7815b375532c0c8f1..d12a13c497ba2374f402e14e22c5671ccf5d1f51 100644 (file)
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -92,7 +92,7 @@ int sysctl_ip_vs_nat_icmp_send = 0;
 int sysctl_ip_vs_conntrack;
 #endif
 int sysctl_ip_vs_snat_reroute = 1;
-
+int sysctl_ip_vs_sync_ver = 1;         /* Default version of sync proto */
 
 #ifdef CONFIG_IP_VS_DEBUG
 static int sysctl_ip_vs_debug_level = 0;
@@ -1536,6 +1536,25 @@ proc_do_sync_threshold(ctl_table *table, int write,
        return rc;
 }
 
+static int
+proc_do_sync_mode(ctl_table *table, int write,
+                    void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+       int *valp = table->data;
+       int val = *valp;
+       int rc;
+
+       rc = proc_dointvec(table, write, buffer, lenp, ppos);
+       if (write && (*valp != val)) {
+               if ((*valp < 0) || (*valp > 1)) {
+                       /* Restore the correct value */
+                       *valp = val;
+               } else {
+                       ip_vs_sync_switch_mode(val);
+               }
+       }
+       return rc;
+}
 
 /*
  *     IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
@@ -1602,6 +1621,13 @@ static struct ctl_table vs_vars[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+       {
+               .procname       = "sync_version",
+               .data           = &sysctl_ip_vs_sync_ver,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_do_sync_mode,
+       },
 #if 0
        {
                .procname       = "timeout_established",