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[TCP]: Add tcp_for_write_queue_from_safe and use it in mtu_probe 

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilpo Järvinen 2007-12-02 00:48:02 +02:00 committed by David S. Miller
parent d67c58e9ae
commit 234b686070
2 changed files with 9 additions and 4 deletions
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5
include/net/tcp.h
View File

@ -1229,6 +1229,11 @@ static inline struct sk_buff *tcp_write_queue_next(struct sock *sk, struct sk_bu
for (; (skb != (struct sk_buff *)&(sk)->sk_write_queue);\
skb = skb->next)
#define tcp_for_write_queue_from_safe(skb, tmp, sk) \
for (tmp = skb->next; \
(skb != (struct sk_buff *)&(sk)->sk_write_queue); \
skb = tmp, tmp = skb->next)
static inline struct sk_buff *tcp_send_head(struct sock *sk)
{
return sk->sk_send_head;

8
net/ipv4/tcp_output.c
View File

@ -1350,9 +1350,7 @@ static int tcp_mtu_probe(struct sock *sk)
tcp_insert_write_queue_before(nskb, skb, sk);
len = 0;
while (len < probe_size) {
next = tcp_write_queue_next(sk, skb);
tcp_for_write_queue_from_safe(skb, next, sk) {
copy = min_t(int, skb->len, probe_size - len);
if (nskb->ip_summed)
skb_copy_bits(skb, 0, skb_put(nskb, copy), copy);
@ -1381,7 +1379,9 @@ static int tcp_mtu_probe(struct sock *sk)
}
len += copy;
skb = next;
if (len >= probe_size)
break;
}
tcp_init_tso_segs(sk, nskb, nskb->len);