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author | Florian Westphal <fw@strlen.de> | 2014-02-22 10:33:25 +0100 |
---|---|---|
committer | Ben Hutchings <ben@decadent.org.uk> | 2014-04-09 02:20:45 +0100 |
commit | 003c46c8d69d85b27979b4fa4f2e5169edeadc54 (patch) | |
tree | ef964088deac8e75ab489afb617b27b8ac1e630b /net/core/skbuff.c | |
parent | 91182754daa6ca26dd2e97ee0b0f6e9e37d33324 (diff) | |
download | kernel_samsung_smdk4412-003c46c8d69d85b27979b4fa4f2e5169edeadc54.zip kernel_samsung_smdk4412-003c46c8d69d85b27979b4fa4f2e5169edeadc54.tar.gz kernel_samsung_smdk4412-003c46c8d69d85b27979b4fa4f2e5169edeadc54.tar.bz2 |
net: add and use skb_gso_transport_seglen()
commit de960aa9ab4decc3304959f69533eef64d05d8e8 upstream.
[ no skb_gso_seglen helper in 3.4, 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: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/core/skbuff.c')
-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 5d6cb54..8ac4a0f 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -45,6 +45,8 @@ #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> @@ -3181,3 +3183,26 @@ void __skb_warn_lro_forwarding(const struct sk_buff *skb) " while LRO is enabled\n", skb->dev->name); } EXPORT_SYMBOL(__skb_warn_lro_forwarding); + +/** + * 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); |