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net: sock_bindtodevice() RCU-ification

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Avoid dev_hold()/dev_put() in sock_bindtodevice()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2009-11-05 21:03:39 -08:00 committed by David S. Miller
parent 69df9d5993
commit bf8e56bfc4
1 changed files with 6 additions and 4 deletions
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10
net/core/sock.c
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@ -420,14 +420,16 @@ static int sock_bindtodevice(struct sock *sk, char __user *optval, int optlen)
if (devname[0] == '\0') { if (devname[0] == '\0') {
index = 0; index = 0;
} else { } else {
struct net_device *dev = dev_get_by_name(net, devname); struct net_device *dev;
rcu_read_lock();
dev = dev_get_by_name_rcu(net, devname);
if (dev)
index = dev->ifindex;
rcu_read_unlock();
ret = -ENODEV; ret = -ENODEV;
if (!dev) if (!dev)
goto out; goto out;
index = dev->ifindex;
dev_put(dev);
} }
lock_sock(sk); lock_sock(sk);