net: Support compat SIOCGETVIFCNT ioctl in ipv4.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 30 insertions, 0 deletions

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index fce10a080bd6..8b65a12654e7 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1444,9 +1444,19 @@ struct compat_sioc_sg_req {
         compat_ulong_t wrong_if;
 };
 
+struct compat_sioc_vif_req {
+        vifi_t  vifi;           /* Which iface */
+        compat_ulong_t icount;
+        compat_ulong_t ocount;
+        compat_ulong_t ibytes;
+        compat_ulong_t obytes;
+};
+
 int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
 {
         struct compat_sioc_sg_req sr;
+        struct compat_sioc_vif_req vr;
+        struct vif_device *vif;
         struct mfc_cache *c;
         struct net *net = sock_net(sk);
         struct mr_table *mrt;
@@ -1456,6 +1466,26 @@ int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
                 return -ENOENT;
 
         switch (cmd) {
+        case SIOCGETVIFCNT:
+                if (copy_from_user(&vr, arg, sizeof(vr)))
+                        return -EFAULT;
+                if (vr.vifi >= mrt->maxvif)
+                        return -EINVAL;
+                read_lock(&mrt_lock);
+                vif = &mrt->vif_table[vr.vifi];
+                if (VIF_EXISTS(mrt, vr.vifi)) {
+                        vr.icount = vif->pkt_in;
+                        vr.ocount = vif->pkt_out;
+                        vr.ibytes = vif->bytes_in;
+                        vr.obytes = vif->bytes_out;
+                        read_unlock(&mrt_lock);
+
+                        if (copy_to_user(arg, &vr, sizeof(vr)))
+                                return -EFAULT;
+                        return 0;
+                }
+                read_unlock(&mrt_lock);
+                return -EADDRNOTAVAIL;
         case SIOCGETSGCNT:
                 if (copy_from_user(&sr, arg, sizeof(sr)))
                         return -EFAULT;