net: correct off-by-one write allocations reports
commit 2b85a34e911bf483c27cfdd124aeb1605145dc80
(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 <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 61b35b9..da0f64f 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1690,7 +1690,8 @@
switch (cmd) {
case TIOCOUTQ: {
long amount;
- amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
+
+ amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
if (amount < 0)
amount = 0;
res = put_user(amount, (int __user *)argp);
@@ -1780,8 +1781,8 @@
ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
ax25_info.n2count = ax25->n2count;
ax25_info.state = ax25->state;
- ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc);
- ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc);
+ ax25_info.rcv_q = sk_wmem_alloc_get(sk);
+ ax25_info.snd_q = sk_rmem_alloc_get(sk);
ax25_info.vs = ax25->vs;
ax25_info.vr = ax25->vr;
ax25_info.va = ax25->va;
@@ -1921,8 +1922,8 @@
if (ax25->sk != NULL) {
seq_printf(seq, " %d %d %lu\n",
- atomic_read(&ax25->sk->sk_wmem_alloc),
- atomic_read(&ax25->sk->sk_rmem_alloc),
+ sk_wmem_alloc_get(ax25->sk),
+ sk_rmem_alloc_get(ax25->sk),
sock_i_ino(ax25->sk));
} else {
seq_puts(seq, " * * *\n");