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netdevsim: add ndo_get_iflink() implementation

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Add an implementation for ndo_get_iflink() in netdevsim that shows the
ifindex of the linked peer, if any.

Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Maciek Machnikowski <maciek@machnikowski.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Wei 2024-02-28 15:22:51 -08:00 committed by David S. Miller
parent 9eb95228a7
commit 8debcf5832
1 changed files with 16 additions and 0 deletions
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16
drivers/net/netdevsim/netdev.c
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@ -283,6 +283,21 @@ nsim_set_features(struct net_device *dev, netdev_features_t features)
return 0;
}
static int nsim_get_iflink(const struct net_device *dev)
{
struct netdevsim *nsim, *peer;
int iflink;
nsim = netdev_priv(dev);
rcu_read_lock();
peer = rcu_dereference(nsim->peer);
iflink = peer ? READ_ONCE(peer->netdev->ifindex) : 0;
rcu_read_unlock();
return iflink;
}
static const struct net_device_ops nsim_netdev_ops = {
.ndo_start_xmit = nsim_start_xmit,
.ndo_set_rx_mode = nsim_set_rx_mode,
@ -300,6 +315,7 @@ static const struct net_device_ops nsim_netdev_ops = {
.ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
.ndo_setup_tc = nsim_setup_tc,
.ndo_set_features = nsim_set_features,
.ndo_get_iflink = nsim_get_iflink,
.ndo_bpf = nsim_bpf,
};