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author | David Ahern <dsahern@gmail.com> | 2017-06-07 12:26:23 -0600 |
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committer | David S. Miller <davem@davemloft.net> | 2017-06-08 11:12:39 -0400 |
commit | 8397ed36b7c585f8d3e06c431f4137309124f78f (patch) | |
tree | 8a25809f8242f918ca61d97b4c509d0d569e057a /net/llc/llc_c_ac.c | |
parent | 0eed9cf58446b28b233388b7f224cbca268b6986 (diff) | |
download | linux-8397ed36b7c585f8d3e06c431f4137309124f78f.tar.gz linux-8397ed36b7c585f8d3e06c431f4137309124f78f.tar.bz2 linux-8397ed36b7c585f8d3e06c431f4137309124f78f.zip |
net: ipv6: Release route when device is unregistering
Roopa reported attempts to delete a bond device that is referenced in a
multipath route is hanging:
$ ifdown bond2 # ifupdown2 command that deletes virtual devices
unregister_netdevice: waiting for bond2 to become free. Usage count = 2
Steps to reproduce:
echo 1 > /proc/sys/net/ipv6/conf/all/ignore_routes_with_linkdown
ip link add dev bond12 type bond
ip link add dev bond13 type bond
ip addr add 2001:db8:2::0/64 dev bond12
ip addr add 2001:db8:3::0/64 dev bond13
ip route add 2001:db8:33::0/64 nexthop via 2001:db8:2::2 nexthop via 2001:db8:3::2
ip link del dev bond12
ip link del dev bond13
The root cause is the recent change to keep routes on a linkdown. Update
the check to detect when the device is unregistering and release the
route for that case.
Fixes: a1a22c12060e4 ("net: ipv6: Keep nexthop of multipath route on admin down")
Reported-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/llc/llc_c_ac.c')
0 files changed, 0 insertions, 0 deletions