net: Support compat SIOCGETVIFCNT ioctl in ipv4.

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

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index fce10a080bd622cee94accc99bfc7ab5baf37fd4..8b65a12654e73db7589a8fc56ee3f7d8d688c461 100644 (file)
--- 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;