> Subject: [Patch rdma-next] RDMA/mana_ib: handle net event for
> pointing to the current netdev
>
> From: Long Li <longli@xxxxxxxxxxxxx>
>
> When running under Hyper-V, the master device to the RDMA device is always
> bonded to this RDMA device if it's present in the kernel. This is not user-
> configurable.
>
> The master device can be unbind/bind from the kernel. During those events,
> the RDMA device should set to the current netdev to relect the change of
> master device from those events.
>
> Signed-off-by: Long Li <longli@xxxxxxxxxxxxx>
This is not the correct patch. Please discard this patch.
> ---
> drivers/infiniband/hw/mana/device.c | 35
> ++++++++++++++++++++++++++++
> drivers/infiniband/hw/mana/mana_ib.h | 1 +
> 2 files changed, 36 insertions(+)
>
> diff --git a/drivers/infiniband/hw/mana/device.c
> b/drivers/infiniband/hw/mana/device.c
> index 3416a85f8738..3e4f069c2258 100644
> --- a/drivers/infiniband/hw/mana/device.c
> +++ b/drivers/infiniband/hw/mana/device.c
> @@ -51,6 +51,37 @@ static const struct ib_device_ops mana_ib_dev_ops = {
> ib_ind_table),
> };
>
> +static int mana_ib_netdev_event(struct notifier_block *this,
> + unsigned long event, void *ptr)
> +{
> + struct mana_ib_dev *dev = container_of(this, struct mana_ib_dev,
> nb);
> + struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
> + struct gdma_context *gc = dev->gdma_dev->gdma_context;
> + struct mana_context *mc = gc->mana.driver_data;
> + struct net_device *ndev;
> +
> + if (event_dev != mc->ports[0])
> + return NOTIFY_DONE;
> +
> + switch (event) {
> + case NETDEV_CHANGEUPPER:
> + rcu_read_lock();
> + ndev = mana_get_primary_netdev_rcu(mc, 0);
> + rcu_read_unlock();
> +
> + /*
> + * RDMA core will setup GID based on updated netdev.
> + * It's not possible to race with the core as rtnl lock is being
> + * held.
> + */
> + ib_device_set_netdev(&dev->ib_dev, ndev, 1);
> +
> + return NOTIFY_OK;
> + default:
> + return NOTIFY_DONE;
> + }
> +}
> +
> static int mana_ib_probe(struct auxiliary_device *adev,
> const struct auxiliary_device_id *id) { @@ -109,6
> +140,9 @@ static int mana_ib_probe(struct auxiliary_device *adev,
> }
> dev->gdma_dev = &mdev->gdma_context->mana_ib;
>
> + dev->nb.notifier_call = mana_ib_netdev_event;
> + register_netdevice_notifier(&dev->nb);
> +
> ret = mana_ib_gd_query_adapter_caps(dev);
> if (ret) {
> ibdev_err(&dev->ib_dev, "Failed to query device caps, ret %d",
> @@ -159,6 +193,7 @@ static void mana_ib_remove(struct auxiliary_device
> *adev) {
> struct mana_ib_dev *dev = dev_get_drvdata(&adev->dev);
>
> + unregister_netdevice_notifier(&dev->nb);
> ib_unregister_device(&dev->ib_dev);
> xa_destroy(&dev->qp_table_wq);
> mana_ib_gd_destroy_rnic_adapter(dev);
> diff --git a/drivers/infiniband/hw/mana/mana_ib.h
> b/drivers/infiniband/hw/mana/mana_ib.h
> index b53a5b4de908..d88187072899 100644
> --- a/drivers/infiniband/hw/mana/mana_ib.h
> +++ b/drivers/infiniband/hw/mana/mana_ib.h
> @@ -64,6 +64,7 @@ struct mana_ib_dev {
> struct gdma_queue **eqs;
> struct xarray qp_table_wq;
> struct mana_ib_adapter_caps adapter_caps;
> + struct notifier_block nb;
> };
>
> struct mana_ib_wq {
> --
> 2.34.1
