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| author | Michel Machado <michel@digirati.com.br> | 2012-06-12 14:16:35 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-06-13 05:51:09 +0400 |
| commit | 95603e2293de556de7e82221649bfd7fd98b64a3 (patch) | |
| tree | d90e7570b072f62ee4fefa619b93ec771bfd9f95 /net/core | |
| parent | de063b7040dcd9fbc9a1847fa44f0af13e19d6de (diff) | |
| download | linux-95603e2293de556de7e82221649bfd7fd98b64a3.tar.xz | |
net-next: add dev_loopback_xmit() to avoid duplicate code
Add dev_loopback_xmit() in order to deduplicate functions
ip_dev_loopback_xmit() (in net/ipv4/ip_output.c) and
ip6_dev_loopback_xmit() (in net/ipv6/ip6_output.c).
I was about to reinvent the wheel when I noticed that
ip_dev_loopback_xmit() and ip6_dev_loopback_xmit() do exactly what I
need and are not IP-only functions, but they were not available to reuse
elsewhere.
ip6_dev_loopback_xmit() does not have line "skb_dst_force(skb);", but I
understand that this is harmless, and should be in dev_loopback_xmit().
Signed-off-by: Michel Machado <michel@digirati.com.br>
CC: "David S. Miller" <davem@davemloft.net>
CC: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
CC: James Morris <jmorris@namei.org>
CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
CC: Patrick McHardy <kaber@trash.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jiri Pirko <jpirko@redhat.com>
CC: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index cd0981977f5c..c6e29ea65bd9 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2476,6 +2476,23 @@ static DEFINE_PER_CPU(int, xmit_recursion); #define RECURSION_LIMIT 10 /** + * dev_loopback_xmit - loop back @skb + * @skb: buffer to transmit + */ +int dev_loopback_xmit(struct sk_buff *skb) +{ + skb_reset_mac_header(skb); + __skb_pull(skb, skb_network_offset(skb)); + skb->pkt_type = PACKET_LOOPBACK; + skb->ip_summed = CHECKSUM_UNNECESSARY; + WARN_ON(!skb_dst(skb)); + skb_dst_force(skb); + netif_rx_ni(skb); + return 0; +} +EXPORT_SYMBOL(dev_loopback_xmit); + +/** * dev_queue_xmit - transmit a buffer * @skb: buffer to transmit * |