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[NET]: Generalise TSO-specific bits from skb_setup_caps

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This patch generalises the TSO-specific bits from sk_setup_caps by adding
the sk_gso_type member to struct sock.  This makes sk_setup_caps generic
so that it can be used by TCPv6 or UFO.

The only catch is that whoever uses this must provide a GSO implementation
for their protocol which I think is a fair deal :) For now UFO continues to
live without a GSO implementation which is OK since it doesn't use the sock
caps field at the moment.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2006-06-30 13:36:35 -07:00 • committed by David S. Miller
commit bcd7611117
6 changed files with 26 additions and 14 deletions
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13
include/net/sock.h
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@ -140,6 +140,7 @@ struct sock_common {
* @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE, %SO_OOBINLINE settings
* @sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets
* @sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
* @sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4)
* @sk_lingertime: %SO_LINGER l_linger setting
* @sk_backlog: always used with the per-socket spinlock held
* @sk_callback_lock: used with the callbacks in the end of this struct
@ -211,6 +212,7 @@ struct sock {
gfp_t sk_allocation;
int sk_sndbuf;
int sk_route_caps;
int sk_gso_type;
int sk_rcvlowat;
unsigned long sk_flags;
unsigned long sk_lingertime;
@ -1025,15 +1027,20 @@ extern struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
extern struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie);
static inline int sk_can_gso(const struct sock *sk)
{
return net_gso_ok(sk->sk_route_caps, sk->sk_gso_type);
}
static inline void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
{
__sk_dst_set(sk, dst);
sk->sk_route_caps = dst->dev->features;
if (sk->sk_route_caps & NETIF_F_GSO)
sk->sk_route_caps |= NETIF_F_TSO;
if (sk->sk_route_caps & NETIF_F_TSO) {
sk->sk_route_caps |= NETIF_F_GSO_MASK;
if (sk_can_gso(sk)) {
if (dst->header_len)
sk->sk_route_caps &= ~NETIF_F_TSO;
sk->sk_route_caps &= ~NETIF_F_GSO_MASK;
else
sk->sk_route_caps |= NETIF_F_SG | NETIF_F_HW_CSUM;
}