Add support for setting the MAC address using the VDPA tool.
This feature will allow setting the MAC address using the VDPA tool.
For example, in vdpa_sim_net, the implementation sets the MAC address
to the config space. However, for other drivers, they can implement their
own function, not limited to the config space.

Changelog v2
 - Changed the function name to prevent misunderstanding
 - Added check for blk device
 - Addressed the comments
Changelog v3
 - Split the function of the net device from vdpa_nl_cmd_dev_attr_set_doit
 - Add a lock for the network device's dev_set_attr operation
 - Address the comments
Changelog v4
 - Address the comments
 - Add a lock for the vdap_sim?_net device's dev_set_attr operation
Changelog v5
 - Address the comments
Changelog v6 
- Replace all the memcpy of mac address with ether_addr_copy()
- Remove the check for VIRTIO_NET_F_MAC in vdpa_dev_net_device_attr_set
- Remove unnecessary check
- Enhance the error log

Cindy Lu (3):
  vdpa: support set mac address from vdpa tool
  vdpa_sim_net: Add the support of set mac address
  vdpa/mlx5: Add the support of set mac address

 drivers/vdpa/mlx5/net/mlx5_vnet.c    | 28 ++++++++++
 drivers/vdpa/vdpa.c                  | 80 ++++++++++++++++++++++++++++
 drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 22 +++++++-
 include/linux/vdpa.h                 |  9 ++++
 include/uapi/linux/vdpa.h            |  1 +
 5 files changed, 139 insertions(+), 1 deletion(-)

-- 
2.45.0

On Thu, Jul 25, 2024 at 09:31:01AM +0800, Cindy Lu wrote:
> Add support for setting the MAC address using the VDPA tool.
> This feature will allow setting the MAC address using the VDPA tool.
> For example, in vdpa_sim_net, the implementation sets the MAC address
> to the config space. However, for other drivers, they can implement their
> own function, not limited to the config space.

[...]

Nit: the subject line has misspelled PATCH as PATH

I believe net-next is still closed so this code needs to be resent
when net-next is open again in a few days.

On Fri, 26 Jul 2024 at 01:25, Joe Damato <jdamato@fastly.com> wrote:
>
> On Thu, Jul 25, 2024 at 09:31:01AM +0800, Cindy Lu wrote:
> > Add support for setting the MAC address using the VDPA tool.
> > This feature will allow setting the MAC address using the VDPA tool.
> > For example, in vdpa_sim_net, the implementation sets the MAC address
> > to the config space. However, for other drivers, they can implement their
> > own function, not limited to the config space.
>
> [...]
>
> Nit: the subject line has misspelled PATCH as PATH
>
> I believe net-next is still closed so this code needs to be resent
> when net-next is open again in a few days.
>
sure,will fix  this
thanks
cindy