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>

1 files changed, 4 insertions, 3 deletions

diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 4dd9a7d18945..6bd8e93869ed 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1309,7 +1309,8 @@ static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
         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;
                 return put_user(amount, (unsigned int __user *) argp);
@@ -1480,8 +1481,8 @@ static int rose_info_show(struct seq_file *seq, void *v)
                         rose->hb / HZ,
                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
                         rose->idle / (60 * HZ),
-                        atomic_read(&s->sk_wmem_alloc),
-                        atomic_read(&s->sk_rmem_alloc),
+                        sk_wmem_alloc_get(s),
+                        sk_rmem_alloc_get(s),
                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
         }