Merge remote-tracking branch 'lsk/v3.10/topic/gator' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / drivers / net / macvtap.c

diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index c70ff7dac00e079265e3865336ecb15f44312c30..9e56eb479a4fcb3b1d7d381b255381db0e07e0c4 100644 (file)
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -797,11 +797,10 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
                                const struct sk_buff *skb,
                                const struct iovec *iv, int len)
 {
-       struct macvlan_dev *vlan;
        int ret;
        int vnet_hdr_len = 0;
        int vlan_offset = 0;
-       int copied;
+       int copied, total;
 
        if (q->flags & IFF_VNET_HDR) {
                struct virtio_net_hdr vnet_hdr;
@@ -816,7 +815,8 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
                if (memcpy_toiovecend(iv, (void *)&vnet_hdr, 0, sizeof(vnet_hdr)))
                        return -EFAULT;
        }
-       copied = vnet_hdr_len;
+       total = copied = vnet_hdr_len;
+       total += skb->len;
 
        if (!vlan_tx_tag_present(skb))
                len = min_t(int, skb->len, len);
@@ -831,6 +831,7 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
 
                vlan_offset = offsetof(struct vlan_ethhdr, h_vlan_proto);
                len = min_t(int, skb->len + VLAN_HLEN, len);
+               total += VLAN_HLEN;
 
                copy = min_t(int, vlan_offset, len);
                ret = skb_copy_datagram_const_iovec(skb, 0, iv, copied, copy);
@@ -848,16 +849,9 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
        }
 
        ret = skb_copy_datagram_const_iovec(skb, vlan_offset, iv, copied, len);
-       copied += len;
 
 done:
-       rcu_read_lock_bh();
-       vlan = rcu_dereference_bh(q->vlan);
-       if (vlan)
-               macvlan_count_rx(vlan, copied - vnet_hdr_len, ret == 0, 0);
-       rcu_read_unlock_bh();
-
-       return ret ? ret : copied;
+       return ret ? ret : total;
 }
 
 static ssize_t macvtap_do_read(struct macvtap_queue *q, struct kiocb *iocb,
@@ -909,7 +903,9 @@ static ssize_t macvtap_aio_read(struct kiocb *iocb, const struct iovec *iv,
        }
 
        ret = macvtap_do_read(q, iocb, iv, len, file->f_flags & O_NONBLOCK);
-       ret = min_t(ssize_t, ret, len); /* XXX copied from tun.c. Why? */
+       ret = min_t(ssize_t, ret, len);
+       if (ret > 0)
+               iocb->ki_pos = ret;
 out:
        return ret;
 }