diff options
| author | Florian Westphal <fw@strlen.de> | 2014-02-22 10:30:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-06 21:30:05 -0800 |
| commit | 3fb03b59b44b2e4216331e398b21754d250ae223 (patch) | |
| tree | cade106cdd24a91a221df2f17d6ddc9dd358e483 /net/core | |
| parent | b306713b6374b184026f3a8a176ac11ee855510a (diff) | |
| download | lwn-3fb03b59b44b2e4216331e398b21754d250ae223.tar.gz lwn-3fb03b59b44b2e4216331e398b21754d250ae223.zip | |
net: add and use skb_gso_transport_seglen()
commit de960aa9ab4decc3304959f69533eef64d05d8e8 upstream.
[ no skb_gso_seglen helper in 3.10, leave tbf alone ]
This moves part of Eric Dumazets skb_gso_seglen helper from tbf sched to
skbuff core so it may be reused by upcoming ip forwarding path patch.
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/skbuff.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 20ee14d0a8a9..79143b7af7e5 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -47,6 +47,8 @@ #include <linux/in.h> #include <linux/inet.h> #include <linux/slab.h> +#include <linux/tcp.h> +#include <linux/udp.h> #include <linux/netdevice.h> #ifdef CONFIG_NET_CLS_ACT #include <net/pkt_sched.h> @@ -3471,3 +3473,26 @@ bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from, return true; } EXPORT_SYMBOL(skb_try_coalesce); + +/** + * skb_gso_transport_seglen - Return length of individual segments of a gso packet + * + * @skb: GSO skb + * + * skb_gso_transport_seglen is used to determine the real size of the + * individual segments, including Layer4 headers (TCP/UDP). + * + * The MAC/L2 or network (IP, IPv6) headers are not accounted for. + */ +unsigned int skb_gso_transport_seglen(const struct sk_buff *skb) +{ + const struct skb_shared_info *shinfo = skb_shinfo(skb); + unsigned int hdr_len; + + if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))) + hdr_len = tcp_hdrlen(skb); + else + hdr_len = sizeof(struct udphdr); + return hdr_len + shinfo->gso_size; +} +EXPORT_SYMBOL_GPL(skb_gso_transport_seglen); |