rdma: Add IB device and net device rename events

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

$ 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>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David Ahern <dsahern@kernel.org>

diff --git a/rdma/monitor.c b/rdma/monitor.c
index 8c14d57579fdd34f8d34d7bd90e7b676d03c38ef..fc80f7d8ce7984c28ac5b917afee8dc82ec75960 100644 (file)
--- a/rdma/monitor.c
+++ b/rdma/monitor.c
@@ -41,6 +41,8 @@ static void mon_print_event_type(struct nlattr **tb)
                [RDMA_UNREGISTER_EVENT] = "[UNREGISTER]",
                [RDMA_NETDEV_ATTACH_EVENT] = "[NETDEV_ATTACH]",
                [RDMA_NETDEV_DETACH_EVENT] = "[NETDEV_DETACH]",
+               [RDMA_RENAME_EVENT] = "[RENAME]",
+               [RDMA_NETDEV_RENAME_EVENT] = "[NETDEV_RENAME]",
        };
        enum rdma_nl_notify_event_type etype;
        char unknown_type[32];