unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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tun: keep link (carrier) state up to date

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Currently, only ethtool can get accurate link state of a tap device.
With this patch, IFF_RUNNING and IF_OPER_UP/DOWN are kept up to date as
well.

Signed-off-by: Nolan Leake <nolan@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nolan Leake 2010-07-27 13:53:43 +00:00 committed by David S. Miller
parent ae3568adf4
commit bee31369ce
1 changed files with 3 additions and 7 deletions
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10
drivers/net/tun.c
View file

@ -149,6 +149,7 @@ static int tun_attach(struct tun_struct *tun, struct file *file)
tfile->tun = tun;
tun->tfile = tfile;
tun->socket.file = file;
netif_carrier_on(tun->dev);
dev_hold(tun->dev);
sock_hold(tun->socket.sk);
atomic_inc(&tfile->count);
@ -162,6 +163,7 @@ static void __tun_detach(struct tun_struct *tun)
{
/* Detach from net device */
netif_tx_lock_bh(tun->dev);
netif_carrier_off(tun->dev);
tun->tfile = NULL;
tun->socket.file = NULL;
netif_tx_unlock_bh(tun->dev);
@ -1574,12 +1576,6 @@ static void tun_set_msglevel(struct net_device *dev, u32 value)
#endif
}
static u32 tun_get_link(struct net_device *dev)
{
struct tun_struct *tun = netdev_priv(dev);
return !!tun->tfile;
}
static u32 tun_get_rx_csum(struct net_device *dev)
{
struct tun_struct *tun = netdev_priv(dev);
@ -1601,7 +1597,7 @@ static const struct ethtool_ops tun_ethtool_ops = {
.get_drvinfo = tun_get_drvinfo,
.get_msglevel = tun_get_msglevel,
.set_msglevel = tun_set_msglevel,
.get_link = tun_get_link,
.get_link = ethtool_op_get_link,
.get_rx_csum = tun_get_rx_csum,
.set_rx_csum = tun_set_rx_csum
};