This series enables creating soft rdma links dynamically using netlink messages. The user 'rdma' command [1] will be enhanced to send these new messages. Note there is at least one outstanding issue: the rdma-core requires RXE links to be named "rxe*" or it fails to associate an rxe uverbs driver with the rxe provider. This, however, can be addressed in a subsequent series. [1] rdma tool support (work-in-progress): https://github.com/larrystevenwise/iproute2/tree/wip/newlink Changes since V7: - refactored on top of the core device register/unregister work by jason: https://www.spinics.net/lists/linux-rdma/msg75462.html Changes since V6: - added Jason's patch to refactor device unregisteration and rxe reference cleanup. - added Yuval's patch as a dependency. - remove dellink() rdma_link_ops method replaced with IB_DEVICE_ALLOW_USER_UNREG device caps flag. If set, then the core will unregister the device in nldev_dellink() for the driver using the new ib_unregister_device_and_put(). - add r-b tags. Changes since V4/V5: - fixed device remove races in rxe - fixed deadlock in NETDEV_UNREGISTER induced rxe device removal - removed redundant string checks in nldev_newlink() - added reviewed-by tag Changes since V3: - link_ops mutex replaced with rwsem - save link_ops pointer in ib_device struct to be used when deleting a link - only require the device index from userland for DELLINK operations - pass struct ib_device pointer to drivers for dellink() Changes since V2: - removed unneeded enum value assignment - removed gotos where there was no unwind logic - protect get and use of link_ops with mutex Changes since V1: - rebased on for-next branch of linux-rdma repo - removed 2 pr_debug()s - validate string lengths in nldev_newlink()/nldev_dellink() - don't allow '%' in ibdev names - make all string parameters const char * in rdma_link_ops - simplified the request_module logic in nldev_newlink() - add leon's reviewed-by tag. Changes since RFC: - rebased on top of leon's and jason's device name work - request module load if the link ops aren't found - detect duplicate link ops adds - const char * changes - use the RDMA_NLDEV open enum values Steve Wise (2): RDMA/core: add RDMA_NLDEV_CMD_NEWLINK/DELLINK support rdma_rxe: use netlink messages to add/delete links drivers/infiniband/core/nldev.c | 122 ++++++++++++++++++++++++++++++++++ drivers/infiniband/sw/rxe/rxe.c | 36 +++++++++- drivers/infiniband/sw/rxe/rxe.h | 2 +- drivers/infiniband/sw/rxe/rxe_net.c | 4 +- drivers/infiniband/sw/rxe/rxe_net.h | 2 +- drivers/infiniband/sw/rxe/rxe_param.h | 3 +- drivers/infiniband/sw/rxe/rxe_sysfs.c | 6 +- drivers/infiniband/sw/rxe/rxe_verbs.c | 4 +- drivers/infiniband/sw/rxe/rxe_verbs.h | 2 +- include/rdma/ib_verbs.h | 3 + include/rdma/rdma_netlink.h | 11 +++ include/uapi/rdma/rdma_netlink.h | 11 ++- 12 files changed, 191 insertions(+), 15 deletions(-) -- 1.8.3.1
