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net: tso: cache transport header length

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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>
This commit is contained in:
Eric Dumazet
2020-06-18 20:46:23 -07:00
committed by David S. Miller
parent 504b912150
commit 761b331cb6
8 changed files with 24 additions and 22 deletions
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include/net/tso.h
+2 -1
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@@ -11,6 +11,7 @@ struct tso_t {
int size;
void *data;
u16 ip_id;
u8 tlen; /* transport header len */
bool ipv6;
u32 tcp_seq;
};
@@ -19,6 +20,6 @@ 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);
void tso_start(struct sk_buff *skb, struct tso_t *tso);
int tso_start(struct sk_buff *skb, struct tso_t *tso);
#endif /* _TSO_H */