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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-09-23 10:28:33 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-24 15:39:22 -0700 |
| commit | a43912ab1925788765208da5cd664b6f8e011d08 (patch) | |
| tree | 6f522dba1fd414b7da3999fa2da062d80a550874 /net/ipv6 | |
| parent | edf42a27e8e242e543716663e54aa2b592ea070a (diff) | |
| download | talos-obmc-linux-a43912ab1925788765208da5cd664b6f8e011d08.tar.gz talos-obmc-linux-a43912ab1925788765208da5cd664b6f8e011d08.zip | |
tunnel: eliminate recursion field
It seems recursion field from "struct ip_tunnel" is not anymore needed.
recursion prevention is done at the upper level (in dev_queue_xmit()),
since we use HARD_TX_LOCK protection for tunnels.
This avoids a cache line ping pong on "struct ip_tunnel" : This structure
should be now mostly read on xmit and receive paths.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/ip6_tunnel.c | 7 | ||||
| -rw-r--r-- | net/ipv6/sit.c | 8 |
2 files changed, 0 insertions, 15 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 7d25bbe32110..c595bbe1ed99 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1043,11 +1043,6 @@ ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) struct net_device_stats *stats = &t->dev->stats; int ret; - if (t->recursion++) { - stats->collisions++; - goto tx_err; - } - switch (skb->protocol) { case htons(ETH_P_IP): ret = ip4ip6_tnl_xmit(skb, dev); @@ -1062,14 +1057,12 @@ ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) if (ret < 0) goto tx_err; - t->recursion--; return NETDEV_TX_OK; tx_err: stats->tx_errors++; stats->tx_dropped++; kfree_skb(skb); - t->recursion--; return NETDEV_TX_OK; } diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 0ae4f6448187..fcb539628847 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -626,11 +626,6 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, struct in6_addr *addr6; int addr_type; - if (tunnel->recursion++) { - stats->collisions++; - goto tx_error; - } - if (skb->protocol != htons(ETH_P_IPV6)) goto tx_error; @@ -753,7 +748,6 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, ip_rt_put(rt); stats->tx_dropped++; dev_kfree_skb(skb); - tunnel->recursion--; return NETDEV_TX_OK; } if (skb->sk) @@ -794,7 +788,6 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, nf_reset(skb); IPTUNNEL_XMIT(); - tunnel->recursion--; return NETDEV_TX_OK; tx_error_icmp: @@ -802,7 +795,6 @@ tx_error_icmp: tx_error: stats->tx_errors++; dev_kfree_skb(skb); - tunnel->recursion--; return NETDEV_TX_OK; } |
