RDMA/nldev: Add IB device and net device rename events

RDMA/nldev: Add IB device and net device rename events

Implement event sending for IB device rename and IB device
port associated netdevice rename.

In iproute2, rdma monitor displays the IB device name, port
and the netdevice name when displaying event info. Since
users can modiy these names, we track and notify on renaming
events.

Note: In order to receive netdevice rename events, drivers
must use the ib_device_set_netdev() API when attaching net
devices to IB devices.

$ rdma monitor
$ rmmod mlx5_ib
[UNREGISTER]	dev 1  rocep8s0f1
[UNREGISTER]	dev 0  rocep8s0f0

$ modprobe mlx5_ib
[REGISTER]	dev 2  mlx5_0
[NETDEV_ATTACH]	dev 2  mlx5_0 port 1 netdev 4 eth2
[REGISTER]	dev 3  mlx5_1
[NETDEV_ATTACH]	dev 3  mlx5_1 port 1 netdev 5 eth3
[RENAME]	dev 2  rocep8s0f0
[RENAME]	dev 3  rocep8s0f1

$ devlink dev eswitch set pci/0000:08:00.0 mode switchdev
[UNREGISTER]	dev 2  rocep8s0f0
[REGISTER]	dev 4  mlx5_0
[NETDEV_ATTACH]	dev 4  mlx5_0 port 30 netdev 4 eth2
[RENAME]	dev 4  rdmap8s0f0

$ echo 4 > /sys/class/net/eth2/device/sriov_numvfs
[NETDEV_ATTACH]	dev 4  rdmap8s0f0 port 2 netdev 7 eth4
[NETDEV_ATTACH]	dev 4  rdmap8s0f0 port 3 netdev 8 eth5
[NETDEV_ATTACH]	dev 4  rdmap8s0f0 port 4 netdev 9 eth6
[NETDEV_ATTACH]	dev 4  rdmap8s0f0 port 5 netdev 10 eth7
[REGISTER]	dev 5  mlx5_0
[NETDEV_ATTACH]	dev 5  mlx5_0 port 1 netdev 11 eth8
[REGISTER]	dev 6  mlx5_1
[NETDEV_ATTACH]	dev 6  mlx5_1 port 1 netdev 12 eth9
[RENAME]	dev 5  rocep8s0f0v0
[RENAME]	dev 6  rocep8s0f0v1
[REGISTER]	dev 7  mlx5_0
[NETDEV_ATTACH]	dev 7  mlx5_0 port 1 netdev 13 eth10
[RENAME]	dev 7  rocep8s0f0v2
[REGISTER]	dev 8  mlx5_0
[NETDEV_ATTACH]	dev 8  mlx5_0 port 1 netdev 14 eth11
[RENAME]	dev 8  rocep8s0f0v3

$ ip link set eth2 name myeth2
[NETDEV_RENAME]	 netdev 4 myeth2

$ ip link set eth1 name myeth1

** no events received, because eth1 is not attached to
   an IB device **

Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Link: https://patch.msgid.link/093c978ef2766fd3ab4ff8798eeb68f2f11582f6.1730367038.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>