From 9cbed5aab5aeea420d0aa945733bf608449d44fb Mon Sep 17 00:00:00 2001 From: Chiara Meiohas Date: Mon, 9 Sep 2024 20:30:24 +0300 Subject: RDMA/nldev: Add support for RDMA monitoring Introduce a new netlink command to allow rdma event monitoring. The rdma events supported now are IB device registration/unregistration and net device attachment/detachment. Example output of rdma monitor and the commands which trigger the 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 $ 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 $ 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_0 [NETDEV_ATTACH] dev 6 mlx5_0 port 1 netdev 12 eth9 [REGISTER] dev 7 mlx5_0 [NETDEV_ATTACH] dev 7 mlx5_0 port 1 netdev 13 eth10 [REGISTER] dev 8 mlx5_0 [NETDEV_ATTACH] dev 8 mlx5_0 port 1 netdev 14 eth11 $ echo 0 > /sys/class/net/eth2/device/sriov_numvfs [UNREGISTER] dev 5 rocep8s0f0v0 [UNREGISTER] dev 6 rocep8s0f0v1 [UNREGISTER] dev 7 rocep8s0f0v2 [UNREGISTER] dev 8 rocep8s0f0v3 [NETDEV_DETACH] dev 4 rdmap8s0f0 port 2 [NETDEV_DETACH] dev 4 rdmap8s0f0 port 3 [NETDEV_DETACH] dev 4 rdmap8s0f0 port 4 [NETDEV_DETACH] dev 4 rdmap8s0f0 port 5 Signed-off-by: Chiara Meiohas Signed-off-by: Michael Guralnik Link: https://patch.msgid.link/20240909173025.30422-7-michaelgur@nvidia.com Signed-off-by: Leon Romanovsky --- include/rdma/rdma_netlink.h | 12 ++++++++++++ include/uapi/rdma/rdma_netlink.h | 15 +++++++++++++++ 2 files changed, 27 insertions(+) (limited to 'include') diff --git a/include/rdma/rdma_netlink.h b/include/rdma/rdma_netlink.h index c2a79aeee113..326deaf56d5d 100644 --- a/include/rdma/rdma_netlink.h +++ b/include/rdma/rdma_netlink.h @@ -6,6 +6,8 @@ #include #include +struct ib_device; + enum { RDMA_NLDEV_ATTR_EMPTY_STRING = 1, RDMA_NLDEV_ATTR_ENTRY_STRLEN = 16, @@ -110,6 +112,16 @@ int rdma_nl_multicast(struct net *net, struct sk_buff *skb, */ bool rdma_nl_chk_listeners(unsigned int group); +/** + * Prepare and send an event message + * @ib: the IB device which triggered the event + * @port_num: the port number which triggered the event - 0 if unused + * @type: the event type + * Returns 0 on success or a negative error code + */ +int rdma_nl_notify_event(struct ib_device *ib, u32 port_num, + enum rdma_nl_notify_event_type type); + struct rdma_link_ops { struct list_head list; const char *type; diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h index 2f37568f5556..5f9636d26050 100644 --- a/include/uapi/rdma/rdma_netlink.h +++ b/include/uapi/rdma/rdma_netlink.h @@ -15,6 +15,7 @@ enum { enum { RDMA_NL_GROUP_IWPM = 2, RDMA_NL_GROUP_LS, + RDMA_NL_GROUP_NOTIFY, RDMA_NL_NUM_GROUPS }; @@ -305,6 +306,8 @@ enum rdma_nldev_command { RDMA_NLDEV_CMD_DELDEV, + RDMA_NLDEV_CMD_MONITOR, + RDMA_NLDEV_NUM_OPS }; @@ -574,6 +577,8 @@ enum rdma_nldev_attr { RDMA_NLDEV_ATTR_NAME_ASSIGN_TYPE, /* u8 */ + RDMA_NLDEV_ATTR_EVENT_TYPE, /* u8 */ + /* * Always the end */ @@ -624,4 +629,14 @@ enum rdma_nl_name_assign_type { RDMA_NAME_ASSIGN_TYPE_USER = 1, /* Provided by user-space */ }; +/* + * Supported rdma monitoring event types. + */ +enum rdma_nl_notify_event_type { + RDMA_REGISTER_EVENT, + RDMA_UNREGISTER_EVENT, + RDMA_NETDEV_ATTACH_EVENT, + RDMA_NETDEV_DETACH_EVENT, +}; + #endif /* _UAPI_RDMA_NETLINK_H */ -- cgit v1.2.3