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| author | Jiri Pirko <jpirko@redhat.com> | 2011-03-12 03:14:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-16 12:53:54 -0700 |
| commit | 8a4eb5734e8d1dc60a8c28576bbbdfdcc643626d (patch) | |
| tree | ed4cd2f9a2a04a30994a8f8964a81834c895c0c9 /net/core/dev.c | |
| parent | 2d7011ca79f1a8792e04d131b8ea21db179ab917 (diff) | |
| download | lwn-8a4eb5734e8d1dc60a8c28576bbbdfdcc643626d.tar.gz lwn-8a4eb5734e8d1dc60a8c28576bbbdfdcc643626d.zip | |
net: introduce rx_handler results and logic around that
This patch allows rx_handlers to better signalize what to do next to
it's caller. That makes skb->deliver_no_wcard no longer needed.
kernel-doc for rx_handler_result is taken from Nicolas' patch.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Reviewed-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 0d39032e9621..0b88eba97dab 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3070,6 +3070,8 @@ out: * on a failure. * * The caller must hold the rtnl_mutex. + * + * For a general description of rx_handler, see enum rx_handler_result. */ int netdev_rx_handler_register(struct net_device *dev, rx_handler_func_t *rx_handler, @@ -3129,6 +3131,7 @@ static int __netif_receive_skb(struct sk_buff *skb) rx_handler_func_t *rx_handler; struct net_device *orig_dev; struct net_device *null_or_dev; + bool deliver_exact = false; int ret = NET_RX_DROP; __be16 type; @@ -3181,18 +3184,22 @@ ncls: rx_handler = rcu_dereference(skb->dev->rx_handler); if (rx_handler) { - struct net_device *prev_dev; - if (pt_prev) { ret = deliver_skb(skb, pt_prev, orig_dev); pt_prev = NULL; } - prev_dev = skb->dev; - skb = rx_handler(skb); - if (!skb) + switch (rx_handler(&skb)) { + case RX_HANDLER_CONSUMED: goto out; - if (skb->dev != prev_dev) + case RX_HANDLER_ANOTHER: goto another_round; + case RX_HANDLER_EXACT: + deliver_exact = true; + case RX_HANDLER_PASS: + break; + default: + BUG(); + } } if (vlan_tx_tag_present(skb)) { @@ -3210,7 +3217,7 @@ ncls: vlan_on_bond_hook(skb); /* deliver only exact match when indicated */ - null_or_dev = skb->deliver_no_wcard ? skb->dev : NULL; + null_or_dev = deliver_exact ? skb->dev : NULL; type = skb->protocol; list_for_each_entry_rcu(ptype, |