Add support for kernel up to 6.8

configure.d/1_bdev_open_by_path.conf

@@ -0,0 +1,53 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+. $(dirname $3)/conf_framework.sh
+
+
+check() {
+	cur_name=$(basename $2)
+	config_file_path=$1
+	if compile_module $cur_name "blkdev_get_by_path(NULL, 0, NULL);" "linux/blkdev.h"
+	then
+		echo $cur_name 1 >> $config_file_path
+	elif compile_module $cur_name "blkdev_get_by_path(NULL, 0, NULL, NULL);" "linux/blkdev.h"
+	then
+		echo $cur_name 2 >> $config_file_path
+	elif compile_module $cur_name "bdev_open_by_path(NULL, 0, NULL, NULL);" "linux/blkdev.h"
+	then
+		echo $cur_name 3 >> $config_file_path
+	else
+		echo $cur_name X >> $config_file_path
+	fi
+}
+
+apply() {
+	case "$1" in
+	"1")
+		add_typedef "struct block_device *cas_bdev_handle_t;"
+		add_define "cas_bdev_open_by_path(path, mode, holder) \\
+			blkdev_get_by_path(path, mode, holder)"
+		add_define "cas_bdev_get_from_handle(handle) \\
+			((struct block_device *)handle)" ;;
+	"2")
+		add_typedef "struct block_device *cas_bdev_handle_t;"
+		add_define "cas_bdev_open_by_path(path, mode, holder) \\
+			blkdev_get_by_path(path, mode, holder, NULL)"
+		add_define "cas_bdev_get_from_handle(handle) \\
+			((struct block_device *)handle)" ;;
+	"3")
+		add_typedef "struct bdev_handle *cas_bdev_handle_t;"
+		add_define "cas_bdev_open_by_path(path, mode, holder) \\
+			bdev_open_by_path(path, mode, holder, NULL)"
+		add_define "cas_bdev_get_from_handle(handle) \\
+			(handle->bdev)" ;;
+	*)
+		exit 1
+	esac
+}
+
+conf_run $@

configure.d/1_bdev_release.conf

@@ -0,0 +1,44 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+. $(dirname $3)/conf_framework.sh
+
+
+check() {
+	cur_name=$(basename $2)
+	config_file_path=$1
+	if compile_module $cur_name "blkdev_put(NULL, FMODE_READ);" "linux/blkdev.h"
+	then
+		echo $cur_name 1 >> $config_file_path
+	elif compile_module $cur_name "blkdev_put(NULL, NULL);" "linux/blkdev.h"
+	then
+		echo $cur_name 2 >> $config_file_path
+	elif compile_module $cur_name "bdev_release(NULL);" "linux/blkdev.h"
+	then
+		echo $cur_name 3 >> $config_file_path
+	else
+		echo $cur_name X >> $config_file_path
+	fi
+}
+
+apply() {
+	case "$1" in
+	"1")
+		add_define "cas_bdev_release(handle, mode, holder) \\
+			blkdev_put((struct block_device *)handle, mode)" ;;
+	"2")
+		add_define "cas_bdev_release(handle, mode, holder) \\
+			blkdev_put((struct block_device *)handle, holder)" ;;
+	"3")
+		add_define "cas_bdev_release(handle, mode, holder) \\
+			bdev_release(handle)" ;;
+	*)
+		exit 1
+	esac
+}
+
+conf_run $@

configure.d/1_cas_blk_mode.conf

@@ -0,0 +1,42 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+. $(dirname $3)/conf_framework.sh
+
+
+check() {
+	cur_name=$(basename $2)
+	config_file_path=$1
+	if compile_module $cur_name "int x = FMODE_EXCL;" "linux/fs.h"
+	then
+		echo $cur_name 1 >> $config_file_path
+	elif compile_module $cur_name "int x = BLK_OPEN_EXCL;" "linux/blkdev.h"
+	then
+		echo $cur_name 2 >> $config_file_path
+	else
+		echo $cur_name X >> $config_file_path
+	fi
+}
+
+apply() {
+	case "$1" in
+	"1")
+		add_define "CAS_BLK_MODE fmode_t"
+		add_define "CAS_BLK_MODE_READ FMODE_READ"
+		add_define "CAS_BLK_MODE_WRITE FMODE_WRITE"
+		add_define "CAS_BLK_MODE_EXCL FMODE_EXCL" ;;
+	"2")
+		add_define "CAS_BLK_MODE blk_mode_t"
+		add_define "CAS_BLK_MODE_READ BLK_OPEN_READ"
+		add_define "CAS_BLK_MODE_WRITE BLK_OPEN_WRITE"
+		add_define "CAS_BLK_MODE_EXCL BLK_OPEN_EXCL" ;;
+	*)
+		exit 1
+	esac
+}
+
+conf_run $@

configure.d/1_class_create.conf

@@ -0,0 +1,35 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+. $(dirname $3)/conf_framework.sh
+
+check() {
+	cur_name=$(basename $2)
+	config_file_path=$1
+	if compile_module $cur_name "class_create(NULL, NULL);" "linux/device.h"
+	then
+		echo $cur_name "1" >> $config_file_path
+	elif compile_module $cur_name "class_create(NULL);" "linux/device.h"
+	then
+		echo $cur_name "2" >> $config_file_path
+	else
+		echo $cur_name "X" >> $config_file_path
+	fi
+}
+
+apply() {
+	case "$1" in
+	"1")
+		add_define "cas_class_create(owner, name) \\
+			class_create(owner, name)";;
+	"2")
+		add_define "cas_class_create(owner, name) \\
+			class_create(name)";;
+	esac
+}
+
+conf_run $@

configure.d/2_bdev_close.conf

@@ -0,0 +1,48 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+. $(dirname $3)/conf_framework.sh
+
+check() {
+	cur_name=$(basename $2)
+	config_file_path=$1
+	if compile_module $cur_name "struct block_device_operations bdo; bdo.release(NULL, 0);" "linux/blkdev.h"
+	then
+		echo $cur_name "1" >> $config_file_path
+	elif compile_module $cur_name "struct block_device_operations bdo; bdo.release(NULL);" "linux/blkdev.h"
+	then
+		echo $cur_name "2" >> $config_file_path
+	else
+		echo $cur_name "X" >> $config_file_path
+	fi
+}
+
+apply() {
+	add_define "CAS_REFER_BDEV_CLOSE_CALLBACK(name) \\
+			name##_callback_wrapper"
+	case "$1" in
+	"1")
+		add_define "CAS_BDEV_CLOSE(name, DISK) \\
+			static void name##_callback(DISK); \\
+			static void name##_callback_wrapper(struct gendisk *gd, \\
+					CAS_BLK_MODE _mode) \\
+			{ \\
+				name##_callback(gd); \\
+			} \\
+			static void name##_callback(DISK)";;
+	"2")
+		add_define "CAS_BDEV_CLOSE(name, DISK) \\
+			static void name##_callback(DISK); \\
+			static void name##_callback_wrapper(struct gendisk *gd) \\
+			{ \\
+				name##_callback(gd); \\
+			} \\
+			static void name##_callback(DISK)";;
+	esac
+}
+
+conf_run $@

configure.d/2_bdev_open.conf

@@ -0,0 +1,49 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+. $(dirname $3)/conf_framework.sh
+
+check() {
+	cur_name=$(basename $2)
+	config_file_path=$1
+	if compile_module $cur_name "struct block_device_operations *ops; struct block_device *bd; ops->open(bd, 0);" "linux/blkdev.h"
+	then
+		echo $cur_name "1" >> $config_file_path
+	elif compile_module $cur_name "struct block_device_operations *ops; struct gendisk *gd; ops->open(gd, 0);" "linux/blkdev.h"
+	then
+		echo $cur_name "2" >> $config_file_path
+	else
+		echo $cur_name "X" >> $config_file_path
+	fi
+}
+
+apply() {
+	add_define "CAS_REFER_BDEV_OPEN_CALLBACK(name) \\
+			name##_callback_wrapper"
+	case "$1" in
+	"1")
+		add_define "CAS_BDEV_OPEN(name, DISK) \\
+			static int name##_callback(DISK); \\
+			static int name##_callback_wrapper(struct block_device *bdev, \\
+					CAS_BLK_MODE _mode) \\
+			{ \\
+				return name##_callback(bdev->bd_disk); \\
+			} \\
+			static int name##_callback(DISK)";;
+	"2")
+		add_define "CAS_BDEV_OPEN(name, DISK) \\
+			static int name##_callback(DISK); \\
+			static int name##_callback_wrapper(struct gendisk *gd, \\
+					CAS_BLK_MODE _mode) \\
+			{ \\
+				return name##_callback(gd->part0->bd_disk); \\
+			} \\
+			static int name##_callback(DISK)";;
+	esac
+}
+
+conf_run $@

configure.d/2_bio_cmpl.conf

@@ -1,6 +1,7 @@
 #!/bin/bash
 #
 # Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -33,14 +34,14 @@ apply() {
 		add_define "CAS_BIO_ENDIO(BIO, BYTES_DONE, ERROR) \\
 			bio_endio(BIO, ERROR)"
 		add_define "CAS_DECLARE_BLOCK_CALLBACK(name, BIO, BYTES_DONE, ERROR) \\
-			void name##_callback(BIO, ERROR)"
+			static void name##_callback(BIO, ERROR)"
 		add_define "CAS_BLOCK_CALLBACK_ERROR(BIO, ERROR) \\
 			ERROR" ;;
 	"2")
 		add_define "CAS_BIO_ENDIO(BIO, BYTES_DONE, ERROR) \\
 			({ CAS_BIO_OP_STATUS(BIO) = ERROR; bio_endio(BIO); })"
 		add_define "CAS_DECLARE_BLOCK_CALLBACK(name, BIO, BYTES_DONE, ERROR) \\
-			void name##_callback(BIO)"
+			static void name##_callback(BIO)"
 		add_define "CAS_BLOCK_CALLBACK_ERROR(BIO, ERROR) \\
 			CAS_BIO_OP_STATUS(BIO)" ;;
 	esac

configure.d/conf_framework.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 #
 # Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -20,6 +21,10 @@ add_function() {
 	printf "%s\n" $1 >> $DEFINE_FILE
 }
 
+add_typedef() {
+	printf "typedef %s\n" $1 >> $DEFINE_FILE
+}
+
 __compile_module(){
 	INCLUDE=""
 	if [ $# -gt 1 ]

modules/cas_cache/classifier.c

@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2019-2021 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
@@ -865,7 +866,7 @@ static void cas_set_classifier(ocf_cache_t cache,
 	cache_priv->classifier = cls;
 }
 
-void _cas_cls_rule_destroy(struct cas_classifier *cls,
+static void _cas_cls_rule_destroy(struct cas_classifier *cls,
 		struct cas_cls_rule *r)
 {
 	struct list_head *item, *n;

modules/cas_cache/context.c

@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2012-2022 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
@@ -52,7 +53,7 @@ static void _cas_page_set_cpu(struct page *page, int cpu)
 	page->private = cpu;
 }
 
-void *_cas_alloc_page_rpool(void *allocator_ctx, int cpu)
+static void *_cas_alloc_page_rpool(void *allocator_ctx, int cpu)
 {
 	struct page *page;
 
@@ -81,7 +82,7 @@ static int _cas_page_get_cpu(struct page *page)
 /*
  *
  */
-ctx_data_t *__cas_ctx_data_alloc(uint32_t pages, bool zalloc)
+static ctx_data_t *__cas_ctx_data_alloc(uint32_t pages, bool zalloc)
 {
 	struct blk_data *data;
 	uint32_t i;

modules/cas_cache/control.c

@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2012-2021 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 #include <linux/cdev.h>
@@ -42,7 +43,7 @@ int __init cas_ctrl_device_init(void)
 		goto error_cdev_add;
 	}
 
-	ctrl->class = class_create(THIS_MODULE, "cas");
+	ctrl->class = cas_class_create(THIS_MODULE, "cas");
 	if (IS_ERR(ctrl->class)) {
 		printk(KERN_ERR "Cannot create control chrdev class.\n");
 		result = PTR_ERR(ctrl->class);