xfrm: remove extranous rcu_read_lock
The handlers for xfrm_tunnel are always invoked with rcu read lock already. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Родитель
0c5794a66c
Коммит
b0558ef24a
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@ -304,7 +304,6 @@ static int vti_err(struct sk_buff *skb, u32 info)
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err = -ENOENT;
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rcu_read_lock();
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t = vti_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr);
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if (t == NULL)
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goto out;
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@ -326,7 +325,6 @@ static int vti_err(struct sk_buff *skb, u32 info)
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t->err_count = 1;
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t->err_time = jiffies;
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out:
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rcu_read_unlock();
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return err;
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}
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@ -336,7 +334,6 @@ static int vti_rcv(struct sk_buff *skb)
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struct ip_tunnel *tunnel;
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const struct iphdr *iph = ip_hdr(skb);
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rcu_read_lock();
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tunnel = vti_tunnel_lookup(dev_net(skb->dev), iph->saddr, iph->daddr);
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if (tunnel != NULL) {
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struct pcpu_tstats *tstats;
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@ -348,10 +345,8 @@ static int vti_rcv(struct sk_buff *skb)
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u64_stats_update_end(&tstats->syncp);
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skb->dev = tunnel->dev;
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rcu_read_unlock();
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return 1;
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}
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rcu_read_unlock();
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return -1;
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}
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@ -365,8 +365,6 @@ static int ipip_err(struct sk_buff *skb, u32 info)
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}
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err = -ENOENT;
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rcu_read_lock();
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t = ipip_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr);
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if (t == NULL)
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goto out;
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@ -398,7 +396,7 @@ static int ipip_err(struct sk_buff *skb, u32 info)
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t->err_count = 1;
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t->err_time = jiffies;
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out:
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rcu_read_unlock();
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return err;
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}
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@ -416,13 +414,11 @@ static int ipip_rcv(struct sk_buff *skb)
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struct ip_tunnel *tunnel;
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const struct iphdr *iph = ip_hdr(skb);
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rcu_read_lock();
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tunnel = ipip_tunnel_lookup(dev_net(skb->dev), iph->saddr, iph->daddr);
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if (tunnel != NULL) {
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struct pcpu_tstats *tstats;
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if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
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rcu_read_unlock();
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kfree_skb(skb);
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return 0;
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}
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@ -445,11 +441,8 @@ static int ipip_rcv(struct sk_buff *skb)
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ipip_ecn_decapsulate(iph, skb);
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netif_rx(skb);
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rcu_read_unlock();
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return 0;
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}
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rcu_read_unlock();
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return -1;
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}
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@ -545,7 +545,6 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
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err = -ENOENT;
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rcu_read_lock();
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t = ipip6_tunnel_lookup(dev_net(skb->dev),
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skb->dev,
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iph->daddr,
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@ -579,7 +578,6 @@ static int ipip6_err(struct sk_buff *skb, u32 info)
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t->err_count = 1;
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t->err_time = jiffies;
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out:
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rcu_read_unlock();
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return err;
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}
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@ -599,7 +597,6 @@ static int ipip6_rcv(struct sk_buff *skb)
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iph = ip_hdr(skb);
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rcu_read_lock();
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tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev,
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iph->saddr, iph->daddr);
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if (tunnel != NULL) {
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@ -615,7 +612,6 @@ static int ipip6_rcv(struct sk_buff *skb)
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if ((tunnel->dev->priv_flags & IFF_ISATAP) &&
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!isatap_chksrc(skb, iph, tunnel)) {
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tunnel->dev->stats.rx_errors++;
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rcu_read_unlock();
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kfree_skb(skb);
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return 0;
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}
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@ -630,12 +626,10 @@ static int ipip6_rcv(struct sk_buff *skb)
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netif_rx(skb);
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rcu_read_unlock();
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return 0;
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}
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/* no tunnel matched, let upstream know, ipsec may handle it */
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rcu_read_unlock();
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return 1;
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out:
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kfree_skb(skb);
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