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RDMA/nldev: provide detailed CM_ID information

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Implement RDMA nldev netlink interface to get detailed CM_ID information.

Because cm_id's are attached to rdma devices in various work queue
contexts, the pid and task information at restrak_add() time is sometimes
not useful.  For example, an nvme/f host connection cm_id ends up being
bound to a device in a work queue context and the resulting pid at attach
time no longer exists after connection setup.  So instead we mark all
cm_id's created via the rdma_ucm as "user", and all others as "kernel".
This required tweaking the restrack code a little.  It also required
wrapping some rdma_cm functions to allow passing the module name string.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Steve Wise
2018-03-01 13:57:44 -08:00
committed by Doug Ledford
parent a3b641af72
commit 00313983cd
8 changed files with 205 additions and 43 deletions
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14
include/uapi/rdma/rdma_netlink.h
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@@ -238,6 +238,8 @@ enum rdma_nldev_command {
RDMA_NLDEV_CMD_RES_QP_GET, /* can dump */
RDMA_NLDEV_CMD_RES_CM_ID_GET, /* can dump */
RDMA_NLDEV_NUM_OPS
};
@@ -350,6 +352,18 @@ enum rdma_nldev_attr {
*/
RDMA_NLDEV_ATTR_RES_KERN_NAME, /* string */
RDMA_NLDEV_ATTR_RES_CM_ID, /* nested table */
RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY, /* nested table */
/*
* rdma_cm_id port space.
*/
RDMA_NLDEV_ATTR_RES_PS, /* u32 */
/*
* Source and destination socket addresses
*/
RDMA_NLDEV_ATTR_RES_SRC_ADDR, /* __kernel_sockaddr_storage */
RDMA_NLDEV_ATTR_RES_DST_ADDR, /* __kernel_sockaddr_storage */
RDMA_NLDEV_ATTR_MAX
};
#endif /* _UAPI_RDMA_NETLINK_H */