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net: correct off-by-one write allocations reports

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commit 2b85a34e91
(net: No more expensive sock_hold()/sock_put() on each tx)
changed initial sk_wmem_alloc value.

We need to take into account this offset when reporting
sk_wmem_alloc to user, in PROC_FS files or various
ioctls (SIOCOUTQ/TIOCOUTQ)

Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2009-06-17 19:05:41 -07:00 • committed by David S. Miller
commit 31e6d363ab
25 changed files with 58 additions and 51 deletions
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2
net/bluetooth/af_bluetooth.c
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@ -337,7 +337,7 @@ int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
if (sk->sk_state == BT_LISTEN)
return -EINVAL;
amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
if (amount < 0)
amount = 0;
err = put_user(amount, (int __user *) arg);