diff options
| author |   Michael S. Tsirkin <mst@redhat.com> | 2013-01-28 00:38:02 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-01-29 15:43:03 -0500 |
| commit | af668b3c276d0f958a3aa46ef8ec47e2d5d333b3 (patch) | |
| tree | 68525f9d6ee11d9c1a9033001a4e106c7cb44071 /drivers/net/tun.c | |
| parent | pktgen: correctly handle failures when adding a device (diff) | |
| download | linux-dev-af668b3c276d0f958a3aa46ef8ec47e2d5d333b3.tar.xz linux-dev-af668b3c276d0f958a3aa46ef8ec47e2d5d333b3.zip | |
tun: fix carrier on/off status
Commit c8d68e6be1c3b242f1c598595830890b65cea64a removed carrier off call
from tun_detach since it's now called on queue disable and not only on
tun close. This confuses userspace which used this flag to detect a
free tun. To fix, put this back but under if (clean).
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Jason Wang <jasowang@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Tested-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index cc09b67c23bc..ffdb84474c47 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -439,10 +439,13 @@ static void __tun_detach(struct tun_file *tfile, bool clean) } if (clean) { - if (tun && tun->numqueues == 0 && tun->numdisabled == 0 && - !(tun->flags & TUN_PERSIST)) - if (tun->dev->reg_state == NETREG_REGISTERED) + if (tun && tun->numqueues == 0 && tun->numdisabled == 0) { + netif_carrier_off(tun->dev); + + if (!(tun->flags & TUN_PERSIST) && + tun->dev->reg_state == NETREG_REGISTERED) unregister_netdevice(tun->dev); + } BUG_ON(!test_bit(SOCK_EXTERNALLY_ALLOCATED, &tfile->socket.flags)); @@ -1658,10 +1661,10 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) device_create_file(&tun->dev->dev, &dev_attr_owner) || device_create_file(&tun->dev->dev, &dev_attr_group)) pr_err("Failed to create tun sysfs files\n"); - - netif_carrier_on(tun->dev); } + netif_carrier_on(tun->dev); + tun_debug(KERN_INFO, tun, "tun_set_iff\n"); if (ifr->ifr_flags & IFF_NO_PI) |