copy: Create a separate copy subsystem library

This removes the strict dependency on the SPDK
event framework.

Change-Id: Ie6b6f9585d09ab1df0f25bf33d53e7cdecd83faa
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/365281
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

app/iscsi_tgt/Makefile

@@ -46,7 +46,7 @@ CFLAGS += -I$(SPDK_ROOT_DIR)/lib
 
 C_SRCS := iscsi_tgt.c
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += jsonrpc json rpc bdev_rpc bdev iscsi scsi net copy trace conf
 SPDK_LIB_LIST += util log log_rpc event app_rpc
 

app/nvmf_tgt/Makefile

@@ -42,7 +42,7 @@ CFLAGS += $(ENV_CFLAGS)
 
 C_SRCS := conf.c nvmf_main.c nvmf_tgt.c nvmf_rpc.c
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += nvmf event log trace conf util bdev copy rpc jsonrpc json
 SPDK_LIB_LIST += app_rpc log_rpc bdev_rpc
 

app/vhost/Makefile

@@ -42,7 +42,7 @@ CFLAGS += $(ENV_CFLAGS)
 
 C_SRCS := vhost.c
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += jsonrpc json rpc bdev_rpc bdev scsi net copy trace conf
 SPDK_LIB_LIST += util log log_rpc event app_rpc
 SPDK_LIB_LIST += vhost rte_vhost

include/spdk/copy_engine.h

@@ -46,6 +46,9 @@ struct spdk_io_channel;
 
 struct spdk_copy_task;
 
+void spdk_copy_engine_initialize(void);
+int spdk_copy_engine_finish(void);
+
 struct spdk_io_channel *spdk_copy_engine_get_io_channel(void);
 int64_t spdk_copy_submit(struct spdk_copy_task *copy_req, struct spdk_io_channel *ch, void *dst,
 			 void *src, uint64_t nbytes, spdk_copy_completion_cb cb);

lib/copy/copy_engine.c

@@ -237,7 +237,7 @@ spdk_copy_engine_module_finish(void)
 	}
 }
 
-static void
+void
 spdk_copy_engine_initialize(void)
 {
 	spdk_copy_engine_module_initialize();
@@ -251,7 +251,7 @@ spdk_copy_engine_initialize(void)
 	spdk_subsystem_init_next(0);
 }
 
-static int
+int
 spdk_copy_engine_finish(void)
 {
 	spdk_copy_engine_module_finish();
@@ -259,4 +259,3 @@ spdk_copy_engine_finish(void)
 }
 
 SPDK_COPY_MODULE_REGISTER(copy_engine_mem_init, NULL, NULL, copy_engine_mem_get_ctx_size)
-SPDK_SUBSYSTEM_REGISTER(copy, spdk_copy_engine_initialize, spdk_copy_engine_finish, NULL)

lib/event/subsystems/Makefile

@@ -34,7 +34,7 @@
 SPDK_ROOT_DIR := $(abspath $(CURDIR)/../../..)
 include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
 
-DIRS-y += bdev
+DIRS-y += bdev copy
 
 .PHONY: all clean $(DIRS-y)
 

lib/event/subsystems/copy/Makefile

@@ -0,0 +1,41 @@
+#
+#  BSD LICENSE
+#
+#  Copyright (c) Intel Corporation.
+#  All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions
+#  are met:
+#
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in
+#      the documentation and/or other materials provided with the
+#      distribution.
+#    * Neither the name of Intel Corporation nor the names of its
+#      contributors may be used to endorse or promote products derived
+#      from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+SPDK_ROOT_DIR := $(abspath $(CURDIR)/../../../..)
+include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
+
+CFLAGS += $(ENV_CFLAGS) -I.
+C_SRCS = copy.c
+LIBNAME = event_copy
+
+include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk

lib/event/subsystems/copy/copy.c

@@ -0,0 +1,41 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "spdk/stdinc.h"
+
+#include "spdk/copy_engine.h"
+
+#include "spdk_internal/event.h"
+
+SPDK_SUBSYSTEM_REGISTER(copy, spdk_copy_engine_initialize, spdk_copy_engine_finish, NULL)
+SPDK_SUBSYSTEM_DEPEND(bdev, copy)

lib/rocksdb/spdk.rocksdb.mk

@@ -49,7 +49,7 @@ CXXFLAGS += -fno-profile-arcs -fno-test-coverage
 CXXFLAGS += -fno-sanitize=undefined
 CXXFLAGS += -fno-sanitize=address
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += blobfs blob bdev blob_bdev copy event util conf trace \
 		log jsonrpc json rpc
 

test/lib/bdev/bdevio/Makefile

@@ -42,7 +42,7 @@ C_SRCS := bdevio.c
 
 CFLAGS += -I. $(ENV_CFLAGS)
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += bdev copy event trace log conf util rpc jsonrpc json
 
 LIBS += $(BLOCKDEV_MODULES_LINKER_ARGS) \

test/lib/bdev/bdevperf/Makefile

@@ -42,7 +42,7 @@ C_SRCS := bdevperf.c
 
 CFLAGS += -I. $(ENV_CFLAGS)
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += bdev copy event trace log conf util rpc jsonrpc json
 
 LIBS += $(BLOCKDEV_MODULES_LINKER_ARGS) \

test/lib/blobfs/fuse/Makefile

@@ -41,7 +41,7 @@ APP = fuse
 C_SRCS := fuse.c
 CFLAGS += $(DPDK_INC)
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += blobfs blob bdev blob_bdev copy event util conf trace \
 		log jsonrpc json rpc
 

test/lib/blobfs/mkfs/Makefile

@@ -41,7 +41,7 @@ APP = mkfs
 C_SRCS := mkfs.c
 CFLAGS += $(DPDK_INC)
 
-SPDK_LIB_LIST = event_bdev
+SPDK_LIB_LIST = event_bdev event_copy
 SPDK_LIB_LIST += blobfs blob bdev blob_bdev copy event util conf trace \
 		log jsonrpc json rpc