From f51a5e82ea9aaf05106c00d976e772ca384a9199 Mon Sep 17 00:00:00 2001 From: Jason Wang Date: Mon, 1 Dec 2014 16:53:15 +0800 Subject: [PATCH] tun/macvtap: use consume_skb() instead of kfree_skb() when needed To be more friendly with drop monitor, we should only call kfree_skb() when the packets were dropped and use consume_skb() in other cases. Cc: Eric Dumazet Signed-off-by: Jason Wang Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller --- drivers/net/macvtap.c | 5 ++++- drivers/net/tun.c | 5 ++++- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 22b4cf2fa108fe..ba1e5db2152e55 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -859,7 +859,10 @@ static ssize_t macvtap_do_read(struct macvtap_queue *q, } if (skb) { ret = macvtap_put_user(q, skb, to); - kfree_skb(skb); + if (unlikely(ret < 0)) + kfree_skb(skb); + else + consume_skb(skb); } if (!noblock) finish_wait(sk_sleep(&q->sk), &wait); diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 6d44da1845945b..9c58286b8a42d2 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1362,7 +1362,10 @@ static ssize_t tun_do_read(struct tun_struct *tun, struct tun_file *tfile, return 0; ret = tun_put_user(tun, tfile, skb, to); - kfree_skb(skb); + if (unlikely(ret < 0)) + kfree_skb(skb); + else + consume_skb(skb); return ret; }