block/rnbd: include client and server modules into kernel compilation

Add rnbd Makefile, Kconfig and also corresponding lines into upper block
layer files.

Link: https://lore.kernel.org/r/20200511135131.27580-24-danil.kipnis@cloud.ionos.comSigned-off-by: NDanil Kipnis <danil.kipnis@cloud.ionos.com>
Signed-off-by: NJack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: NBart Van Assche <bvanassche@acm.org>
Acked-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

drivers/block/Kconfig

@@ -458,4 +458,6 @@ config BLK_DEV_RSXX
 	  To compile this driver as a module, choose M here: the
 	  module will be called rsxx.
 
+source "drivers/block/rnbd/Kconfig"
+
 endif # BLK_DEV

drivers/block/Makefile

@@ -39,6 +39,7 @@ obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX)	+= mtip32xx/
 
 obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
 obj-$(CONFIG_ZRAM) += zram/
+obj-$(CONFIG_BLK_DEV_RNBD)	+= rnbd/
 
 obj-$(CONFIG_BLK_DEV_NULL_BLK)	+= null_blk.o
 null_blk-objs	:= null_blk_main.o

drivers/block/rnbd/Kconfig

+# SPDX-License-Identifier: GPL-2.0-or-later
+
+config BLK_DEV_RNBD
+	bool
+
+config BLK_DEV_RNBD_CLIENT
+	tristate "RDMA Network Block Device driver client"
+	depends on INFINIBAND_RTRS_CLIENT
+	select BLK_DEV_RNBD
+	help
+	  RNBD client is a network block device driver using rdma transport.
+
+	  RNBD client allows for mapping of a remote block devices over
+	  RTRS protocol from a target system where RNBD server is running.
+
+	  If unsure, say N.
+
+config BLK_DEV_RNBD_SERVER
+	tristate "RDMA Network Block Device driver server"
+	depends on INFINIBAND_RTRS_SERVER
+	select BLK_DEV_RNBD
+	help
+	  RNBD server is the server side of RNBD using rdma transport.
+
+	  RNBD server allows for exporting local block devices to a remote client
+	  over RTRS protocol.
+
+	  If unsure, say N.

drivers/block/rnbd/Makefile

+# SPDX-License-Identifier: GPL-2.0-or-later
+
+ccflags-y := -I$(srctree)/drivers/infiniband/ulp/rtrs
+
+rnbd-client-y := rnbd-clt.o \
+		  rnbd-clt-sysfs.o \
+		  rnbd-common.o
+
+rnbd-server-y := rnbd-common.o \
+		  rnbd-srv.o \
+		  rnbd-srv-dev.o \
+		  rnbd-srv-sysfs.o
+
+obj-$(CONFIG_BLK_DEV_RNBD_CLIENT) += rnbd-client.o
+obj-$(CONFIG_BLK_DEV_RNBD_SERVER) += rnbd-server.o