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| author | Taehee Yoo <ap420073@gmail.com> | 2020-04-30 17:37:02 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-30 13:25:18 -0700 |
| commit | 34a9c361dd480041d790fff3d6ea58513c8769e8 (patch) | |
| tree | 7a1557a9c6bad4309b42eee6ebc267002aab6268 /net/hsr | |
| parent | 1b2e788490deef5e570ebe604b5cc50f82877c11 (diff) | |
| download | linux-34a9c361dd480041d790fff3d6ea58513c8769e8.tar.gz linux-34a9c361dd480041d790fff3d6ea58513c8769e8.tar.bz2 linux-34a9c361dd480041d790fff3d6ea58513c8769e8.zip | |
hsr: remove hsr interface if all slaves are removed
When all hsr slave interfaces are removed, hsr interface doesn't work.
At that moment, it's fine to remove an unused hsr interface automatically
for saving resources.
That's a common behavior of virtual interfaces.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/hsr')
| -rw-r--r-- | net/hsr/hsr_main.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c index 26d6c39f24e1..e2564de67603 100644 --- a/net/hsr/hsr_main.c +++ b/net/hsr/hsr_main.c @@ -15,12 +15,23 @@ #include "hsr_framereg.h" #include "hsr_slave.h" +static bool hsr_slave_empty(struct hsr_priv *hsr) +{ + struct hsr_port *port; + + hsr_for_each_port(hsr, port) + if (port->type != HSR_PT_MASTER) + return false; + return true; +} + static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event, void *ptr) { - struct net_device *dev; struct hsr_port *port, *master; + struct net_device *dev; struct hsr_priv *hsr; + LIST_HEAD(list_kill); int mtu_max; int res; @@ -85,8 +96,15 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event, master->dev->mtu = mtu_max; break; case NETDEV_UNREGISTER: - if (!is_hsr_master(dev)) + if (!is_hsr_master(dev)) { + master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER); hsr_del_port(port); + if (hsr_slave_empty(master->hsr)) { + unregister_netdevice_queue(master->dev, + &list_kill); + unregister_netdevice_many(&list_kill); + } + } break; case NETDEV_PRE_TYPE_CHANGE: /* HSR works only on Ethernet devices. Refuse slave to change |