Commit 3d407a80 authored Aug 21, 2013 by Pavel Emelyanov Committed by David S. Miller Aug 21, 2013

tun: Report whether the queue is attached or not



Multiqueue tun devices allow to attach and detach from its queues
while keeping the interface itself set on file.

Knowing this is critical for the checkpoint part of criu project.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent fb7589a1

drivers/net/tun.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1881,6 +1881,9 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
		case TUNGETIFF:
		tun_get_iff(current->nsproxy->net_ns, tun, &ifr);

		if (tfile->detached)
		ifr.ifr_flags \|= IFF_DETACH_QUEUE;

		if (copy_to_user(argp, &ifr, ifreq_len))
		ret = -EFAULT;
		break;

Admin message