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authorHerbert Xu <herbert@gondor.apana.org.au>2006-04-19 21:35:00 -0700
committerDavid S. Miller <davem@davemloft.net>2006-04-19 21:35:00 -0700
commitb60b49ea6a3e1f8dcaf4148dad0daab61ab766d2 (patch)
tree83a18b5188d632692da34f9ed8265fcecb4d9f35
parentd47f3640fe2ac4da8a8e713a549e6eaf23ac2084 (diff)
[TCP]: Account skb overhead in tcp_fragment
Make sure that we get the full sizeof(struct sk_buff) plus the data size accounted for in skb->truesize. This will create invariants that will allow adding assertion checks on skb->truesize. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/tcp_output.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 44df1db726a..a28ae593b97 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -533,6 +533,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *buff;
int nsize, old_factor;
+ int nlen;
u16 flags;
BUG_ON(len > skb->len);
@@ -552,8 +553,10 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
if (buff == NULL)
return -ENOMEM; /* We'll just try again later. */
- buff->truesize = skb->len - len;
- skb->truesize -= buff->truesize;
+ sk_charge_skb(sk, buff);
+ nlen = skb->len - len - nsize;
+ buff->truesize += nlen;
+ skb->truesize -= nlen;
/* Correct the sequence numbers. */
TCP_SKB_CB(buff)->seq = TCP_SKB_CB(skb)->seq + len;
@@ -1039,7 +1042,8 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
if (unlikely(buff == NULL))
return -ENOMEM;
- buff->truesize = nlen;
+ sk_charge_skb(sk, buff);
+ buff->truesize += nlen;
skb->truesize -= nlen;
/* Correct the sequence numbers. */