diff options
| author | David Wei <dw@davidwei.uk> | 2024-02-29 00:22:49 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-03-01 11:43:10 +0100 |
| commit | f532957d76de89b8ee2545cb6ad5265e1701d0ba (patch) | |
| tree | 53684d85ffd6c34fe1f9f44cce7de092802272ad /drivers/net/netdevsim/netdev.c | |
| parent | Merge branch 'selftests-xfail' (diff) | |
| download | linux-f532957d76de89b8ee2545cb6ad5265e1701d0ba.tar.xz linux-f532957d76de89b8ee2545cb6ad5265e1701d0ba.zip | |
netdevsim: allow two netdevsim ports to be connected
Add two netdevsim bus attribute to sysfs:
/sys/bus/netdevsim/link_device
/sys/bus/netdevsim/unlink_device
Writing "A M B N" to link_device will link netdevsim M in netnsid A with
netdevsim N in netnsid B.
Writing "A M" to unlink_device will unlink netdevsim M in netnsid A from
its peer, if any.
rtnl_lock is taken to ensure nothing changes during the linking.
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Maciek Machnikowski <maciek@machnikowski.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netdevsim/netdev.c')
| -rw-r--r-- | drivers/net/netdevsim/netdev.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c index 77e8250282a5..9063f4f2971b 100644 --- a/drivers/net/netdevsim/netdev.c +++ b/drivers/net/netdevsim/netdev.c @@ -413,8 +413,13 @@ err_free_netdev: void nsim_destroy(struct netdevsim *ns) { struct net_device *dev = ns->netdev; + struct netdevsim *peer; rtnl_lock(); + peer = rtnl_dereference(ns->peer); + if (peer) + RCU_INIT_POINTER(peer->peer, NULL); + RCU_INIT_POINTER(ns->peer, NULL); unregister_netdevice(dev); if (nsim_dev_port_is_pf(ns->nsim_dev_port)) { nsim_macsec_teardown(ns); @@ -427,6 +432,11 @@ void nsim_destroy(struct netdevsim *ns) free_netdev(dev); } +bool netdev_is_nsim(struct net_device *dev) +{ + return dev->netdev_ops == &nsim_netdev_ops; +} + static int nsim_validate(struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) { |