[PATCH net-next] tun: use symmetric hash
From: Jason Wang <hidden>
Date: 2017-06-06 06:10:01
Tun actually expects a symmetric hash for queue selecting to work correctly, otherwise packets belongs to a single flow may be redirected to the wrong queue. So this patch switch to use __skb_get_hash_symmetric(). Signed-off-by: Jason Wang <redacted> --- drivers/net/tun.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index f8041f9c..fe660e5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c@@ -465,7 +465,7 @@ static u16 tun_select_queue(struct net_device *dev, struct sk_buff *skb, rcu_read_lock(); numqueues = ACCESS_ONCE(tun->numqueues); - txq = skb_get_hash(skb); + txq = __skb_get_hash_symmetric(skb); if (txq) { e = tun_flow_find(&tun->flows[tun_hashfn(txq)], txq); if (e) {
@@ -867,7 +867,7 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev) */ __u32 rxhash; - rxhash = skb_get_hash(skb); + rxhash = __skb_get_hash_symmetric(skb); if (rxhash) { struct tun_flow_entry *e; e = tun_flow_find(&tun->flows[tun_hashfn(rxhash)],
@@ -1334,7 +1334,7 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, skb_reset_network_header(skb); skb_probe_transport_header(skb, 0); - rxhash = skb_get_hash(skb); + rxhash = __skb_get_hash_symmetric(skb); #ifndef CONFIG_4KSTACKS tun_rx_batched(tun, tfile, skb, more); #else
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2.7.4