diff options
| author | Florian Westphal <fw@strlen.de> | 2014-02-22 09:28:29 (GMT) |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-02-26 09:22:53 (GMT) |
| commit | 449c57330908bd59b524091c0b7d12d5ab39197d (patch) | |
| tree | 415dc7239d5b868f8089e592b0b08495f0fe4169 /net/core | |
| parent | 515266decdb0d4b868b0dec7a70d37af48918b25 (diff) | |
| download | linux-fsl-qoriq-449c57330908bd59b524091c0b7d12d5ab39197d.tar.xz | |
net: add and use skb_gso_transport_seglen()
commit de960aa9ab4decc3304959f69533eef64d05d8e8 upstream.
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: Jiri Slaby <jslaby@suse.cz>
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 2c7baa8..21571dc 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> @@ -3519,3 +3521,26 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet) nf_reset_trace(skb); } EXPORT_SYMBOL_GPL(skb_scrub_packet); + +/** + * 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); |