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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-08-30 15:07:25 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-01 21:57:53 +0400 |
| commit | 875168a9330d3aa6481ce62ce8fa77c7be0c75fb (patch) | |
| tree | 137a2d264cf960c8f6cc1a8961704cc1062014e7 /net/ipv4/tunnel4.c | |
| parent | 064270132602c6e11482439e0e257f208cae79c0 (diff) | |
| download | linux-875168a9330d3aa6481ce62ce8fa77c7be0c75fb.tar.xz | |
net: tunnels should use rcu_dereference
tunnel4_handlers, tunnel64_handlers, tunnel6_handlers and
tunnel46_handlers are protected by RCU, but we dont use appropriate rcu
primitives to scan them. rcu_lock() is already held by caller.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tunnel4.c')
| -rw-r--r-- | net/ipv4/tunnel4.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/net/ipv4/tunnel4.c b/net/ipv4/tunnel4.c index 942f02da07d8..df59d16337f2 100644 --- a/net/ipv4/tunnel4.c +++ b/net/ipv4/tunnel4.c @@ -73,6 +73,11 @@ int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family) } EXPORT_SYMBOL(xfrm4_tunnel_deregister); +#define for_each_tunnel_rcu(head, handler) \ + for (handler = rcu_dereference(head); \ + handler != NULL; \ + handler = rcu_dereference(handler->next)) \ + static int tunnel4_rcv(struct sk_buff *skb) { struct xfrm_tunnel *handler; @@ -80,7 +85,7 @@ static int tunnel4_rcv(struct sk_buff *skb) if (!pskb_may_pull(skb, sizeof(struct iphdr))) goto drop; - for (handler = tunnel4_handlers; handler; handler = handler->next) + for_each_tunnel_rcu(tunnel4_handlers, handler) if (!handler->handler(skb)) return 0; @@ -99,7 +104,7 @@ static int tunnel64_rcv(struct sk_buff *skb) if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) goto drop; - for (handler = tunnel64_handlers; handler; handler = handler->next) + for_each_tunnel_rcu(tunnel64_handlers, handler) if (!handler->handler(skb)) return 0; @@ -115,7 +120,7 @@ static void tunnel4_err(struct sk_buff *skb, u32 info) { struct xfrm_tunnel *handler; - for (handler = tunnel4_handlers; handler; handler = handler->next) + for_each_tunnel_rcu(tunnel4_handlers, handler) if (!handler->err_handler(skb, info)) break; } @@ -125,7 +130,7 @@ static void tunnel64_err(struct sk_buff *skb, u32 info) { struct xfrm_tunnel *handler; - for (handler = tunnel64_handlers; handler; handler = handler->next) + for_each_tunnel_rcu(tunnel64_handlers, handler) if (!handler->err_handler(skb, info)) break; } |