diff options
| author | stephen hemminger <shemminger@vyatta.com> | 2012-09-24 22:12:24 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-28 02:12:37 +0400 |
| commit | 0c5794a66c7c6443759e6098841767958a031187 (patch) | |
| tree | bc5206b2ce2fa58fc47f6d94fabc7c1bb9fa6f78 /net/ipv6 | |
| parent | d208328765a0ab425e36b5b828285f3337a85451 (diff) | |
| download | linux-0c5794a66c7c6443759e6098841767958a031187.tar.xz | |
gre: remove unnecessary rcu_read_lock/unlock
The gre function pointers for receive and error handling are
always called (from gre.c) with rcu_read_lock already held.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/ip6_gre.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 424d11a4e7ff..b987d4db790f 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -437,14 +437,12 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, ipv6h = (const struct ipv6hdr *)skb->data; p = (__be16 *)(skb->data + offset); - rcu_read_lock(); - t = ip6gre_tunnel_lookup(skb->dev, &ipv6h->daddr, &ipv6h->saddr, flags & GRE_KEY ? *(((__be32 *)p) + (grehlen / 4) - 1) : 0, p[1]); if (t == NULL) - goto out; + return; switch (type) { __u32 teli; @@ -489,8 +487,6 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, else t->err_count = 1; t->err_time = jiffies; -out: - rcu_read_unlock(); } static inline void ip6gre_ecn_decapsulate_ipv4(const struct ip6_tnl *t, @@ -528,7 +524,7 @@ static int ip6gre_rcv(struct sk_buff *skb) __be16 gre_proto; if (!pskb_may_pull(skb, sizeof(struct in6_addr))) - goto drop_nolock; + goto drop; ipv6h = ipv6_hdr(skb); h = skb->data; @@ -539,7 +535,7 @@ static int ip6gre_rcv(struct sk_buff *skb) - We do not support routing headers. */ if (flags&(GRE_VERSION|GRE_ROUTING)) - goto drop_nolock; + goto drop; if (flags&GRE_CSUM) { switch (skb->ip_summed) { @@ -567,7 +563,6 @@ static int ip6gre_rcv(struct sk_buff *skb) gre_proto = *(__be16 *)(h + 2); - rcu_read_lock(); tunnel = ip6gre_tunnel_lookup(skb->dev, &ipv6h->saddr, &ipv6h->daddr, key, gre_proto); @@ -646,14 +641,11 @@ static int ip6gre_rcv(struct sk_buff *skb) netif_rx(skb); - rcu_read_unlock(); return 0; } icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); drop: - rcu_read_unlock(); -drop_nolock: kfree_skb(skb); return 0; } |