linux/include/net/tso.h
Eric Dumazet 761b331cb6 net: tso: cache transport header length
Add tlen field into struct tso_t, and change tso_start()
to return skb_transport_offset(skb) + tso->tlen

This removes from callers the need to use tcp_hdrlen(skb) and
will ease UDP segmentation offload addition.

v2: calls tso_start() earlier in otx2_sq_append_tso() [Jakub]

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-06-18 20:46:23 -07:00

26 lines
566 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _TSO_H
#define _TSO_H
#include <net/ip.h>
#define TSO_HEADER_SIZE 256
struct tso_t {
int next_frag_idx;
int size;
void *data;
u16 ip_id;
u8 tlen; /* transport header len */
bool ipv6;
u32 tcp_seq;
};
int tso_count_descs(const struct sk_buff *skb);
void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,
int size, bool is_last);
void tso_build_data(const struct sk_buff *skb, struct tso_t *tso, int size);
int tso_start(struct sk_buff *skb, struct tso_t *tso);
#endif /* _TSO_H */