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| author | John Fastabend <john.fastabend@gmail.com> | 2013-10-22 01:28:02 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-10-23 03:22:09 +0400 |
| commit | 47d4ab91e4472723f181075c81627374ca86816c (patch) | |
| tree | b8f3811fd8c623012acecf0feee68290b05ea1a0 /drivers/net | |
| parent | 5378c2e6ea236de847a39bdb6f3aa83137120d26 (diff) | |
| download | linux-47d4ab91e4472723f181075c81627374ca86816c.tar.xz | |
macvlan: resolve ENOENT errors on creation
After the commit below attempting to create macvlan devices was
resulting in ENOENT errors,
# ip link add link p3p2 type macvlan
RTNETLINK answers: Invalid argument
This happens because netdev_upper_dev_link() is called before
register_netdevice() in the macvlan code. Through a call chain
this results in a call to __netdev_adjacent_dev_insert() and
finally a sysfs_create_link(). This requires the kobject of
the macvlan to be registered which is done in register_netdevice().
If there is no kobject which is the case here the ENOENT error
is seen on the command line.
To resolve this move the netdev_upper_dev_link() call below
the register_netdevice() call. This aligns with vlan driver
flow.
Regression introduced here,
commit 5831d66e8097aedfa3bc35941cf265ada2352317
Author: Veaceslav Falico <vfalico@redhat.com>
Date: Wed Sep 25 09:20:32 2013 +0200
net: create sysfs symlinks for neighbour devices
CC: Veaceslav Falico <vfalico@redhat.com>
CC: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Veaceslav Falico <vfalico@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/macvlan.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 9bf46bd19b87..cc9845ec91c1 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -828,22 +828,21 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev, eth_hw_addr_inherit(dev, lowerdev); } + port->count += 1; + err = register_netdevice(dev); + if (err < 0) + goto destroy_port; + err = netdev_upper_dev_link(lowerdev, dev); if (err) goto destroy_port; - port->count += 1; - err = register_netdevice(dev); - if (err < 0) - goto upper_dev_unlink; list_add_tail_rcu(&vlan->list, &port->vlans); netif_stacked_transfer_operstate(lowerdev, dev); return 0; -upper_dev_unlink: - netdev_upper_dev_unlink(lowerdev, dev); destroy_port: port->count -= 1; if (!port->count) |