Add support for Linux kernel up to 6.5

Signed-off-by: Tamar Levovitz <tamar.levovitz@huawei.com>
Signed-off-by: Robert Baldyga <robert.baldyga@huawei.com>

configure.d/1_bdev_get_by_path.conf

@@ -0,0 +1,38 @@
+#!/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
+	else
+		echo $cur_name X >> $config_file_path
+	fi
+}
+
+apply() {
+	case "$1" in
+	"1")
+		add_define "cas_blkdev_get_by_path(path, mode, holder) \\
+			blkdev_get_by_path(path, mode, holder)" ;;
+	"2")
+		add_define "cas_blkdev_get_by_path(path, mode, holder) \\
+			blkdev_get_by_path(path, mode, holder, NULL)" ;;
+	*)
+		exit 1
+	esac
+}
+
+conf_run $@

configure.d/1_bdev_put.conf

@@ -0,0 +1,38 @@
+#!/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
+	else
+		echo $cur_name X >> $config_file_path
+	fi
+}
+
+apply() {
+	case "$1" in
+	"1")
+		add_define "cas_blkdev_put(bdev, mode, holder) \\
+		blkdev_put(bdev, mode)" ;;
+	"2")
+		add_define "cas_blkdev_put(bdev, mode, holder) \\
+		blkdev_put(bdev, holder)" ;;
+	*)
+		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/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 $@

modules/cas_cache/disk.c

@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2012-2022 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 #include <linux/module.h>
@@ -11,18 +12,19 @@
 #include "exp_obj.h"
 #include "debug.h"
 
-#define CAS_DISK_OPEN_FMODE (FMODE_READ | FMODE_WRITE)
+#define CAS_DISK_OPEN_MODE (CAS_BLK_MODE_READ | CAS_BLK_MODE_WRITE)
 
 static inline struct block_device *open_bdev_exclusive(const char *path,
-						       fmode_t mode,
+		CAS_BLK_MODE mode, void *holder)
-						       void *holder)
 {
-	return blkdev_get_by_path(path, mode | FMODE_EXCL, holder);
+	return cas_blkdev_get_by_path(path, mode | CAS_BLK_MODE_EXCL,
+			 holder);
 }
 
-static inline void close_bdev_exclusive(struct block_device *bdev, fmode_t mode)
+static inline void close_bdev_exclusive(struct block_device *bdev,
+		CAS_BLK_MODE mode)
 {
-	blkdev_put(bdev, mode | FMODE_EXCL);
+	cas_blkdev_put(bdev, mode | CAS_BLK_MODE_EXCL, NULL);
 }
 
 int __init cas_init_disks(void)
@@ -67,7 +69,7 @@ struct cas_disk *cas_disk_open(const char *path)
 		goto error_kstrdup;
 	}
 
-	dsk->bd = open_bdev_exclusive(path, CAS_DISK_OPEN_FMODE, dsk);
+	dsk->bd = open_bdev_exclusive(path, CAS_DISK_OPEN_MODE, dsk);
 	if (IS_ERR(dsk->bd)) {
 		CAS_DEBUG_ERROR("Cannot open exclusive");
 		result = PTR_ERR(dsk->bd);
@@ -93,7 +95,7 @@ void cas_disk_close(struct cas_disk *dsk)
 
 	CAS_DEBUG_DISK(dsk, "Destroying (%p)", dsk);
 
-	close_bdev_exclusive(dsk->bd, CAS_DISK_OPEN_FMODE);
+	close_bdev_exclusive(dsk->bd, CAS_DISK_OPEN_MODE);
 
 	kfree(dsk->path);
 	kmem_cache_free(cas_module.disk_cache, dsk);

modules/cas_cache/exp_obj.c

@@ -256,9 +256,9 @@ static void _cas_exp_obj_clear_dev_t(struct cas_disk *dsk)
 	}
 }
 
-static int _cas_exp_obj_open(struct block_device *bdev, fmode_t mode)
+CAS_BDEV_OPEN(_cas_exp_obj_open, struct gendisk *gd)
 {
-	struct cas_disk *dsk = bdev->bd_disk->private_data;
+	struct cas_disk *dsk = gd->private_data;
 	struct cas_exp_obj *exp_obj = dsk->exp_obj;
 	int result = -ENAVAIL;
 
@@ -277,7 +277,7 @@ static int _cas_exp_obj_open(struct block_device *bdev, fmode_t mode)
 	return result;
 }
 
-static void _cas_exp_obj_close(struct gendisk *gd, fmode_t mode)
+CAS_BDEV_CLOSE(_cas_exp_obj_close, struct gendisk *gd)
 {
 	struct cas_disk *dsk = gd->private_data;
 	struct cas_exp_obj *exp_obj = dsk->exp_obj;
@@ -292,8 +292,8 @@ static void _cas_exp_obj_close(struct gendisk *gd, fmode_t mode)
 
 static const struct block_device_operations _cas_exp_obj_ops = {
 	.owner = THIS_MODULE,
-	.open = _cas_exp_obj_open,
+	.open = CAS_REFER_BDEV_OPEN_CALLBACK(_cas_exp_obj_open),
-	.release = _cas_exp_obj_close,
+	.release = CAS_REFER_BDEV_CLOSE_CALLBACK(_cas_exp_obj_close),
 	CAS_SET_SUBMIT_BIO(_cas_exp_obj_submit_bio)
 };
 

modules/cas_cache/layer_cache_management.c

@@ -1143,8 +1143,8 @@ int cache_mngt_cache_check_device(struct kcas_cache_check_device *cmd_info)
 	char holder[] = "CAS CHECK CACHE DEVICE\n";
 	int result;
 
-	bdev = blkdev_get_by_path(cmd_info->path_name, (FMODE_EXCL|FMODE_READ),
+	bdev = cas_blkdev_get_by_path(cmd_info->path_name,
-			holder);
+			(CAS_BLK_MODE_EXCL | CAS_BLK_MODE_READ), holder);
 	if (IS_ERR(bdev)) {
 		return (PTR_ERR(bdev) == -EBUSY) ?
 				-OCF_ERR_NOT_OPEN_EXC :
@@ -1165,7 +1165,7 @@ int cache_mngt_cache_check_device(struct kcas_cache_check_device *cmd_info)
 
 	cas_blk_close_volume(volume);
 out_bdev:
-	blkdev_put(bdev, (FMODE_EXCL|FMODE_READ));
+	cas_blkdev_put(bdev, (CAS_BLK_MODE_EXCL | CAS_BLK_MODE_READ), holder);
 	return result;
 }
 
@@ -2140,8 +2140,8 @@ static int _cache_mngt_probe_metadata(char *cache_path_name,
 	char holder[] = "CAS CHECK METADATA\n";
 	int result;
 
-	bdev = blkdev_get_by_path(cache_path_name, (FMODE_EXCL|FMODE_READ),
+	bdev = cas_blkdev_get_by_path(cache_path_name,
-			holder);
+			(CAS_BLK_MODE_EXCL | CAS_BLK_MODE_READ), holder);
 	if (IS_ERR(bdev)) {
 		return (PTR_ERR(bdev) == -EBUSY) ?
 			-OCF_ERR_NOT_OPEN_EXC :
@@ -2164,7 +2164,7 @@ static int _cache_mngt_probe_metadata(char *cache_path_name,
 
 	cas_blk_close_volume(volume);
 out_bdev:
-	blkdev_put(bdev, (FMODE_EXCL|FMODE_READ));
+	cas_blkdev_put(bdev, (CAS_BLK_MODE_EXCL | CAS_BLK_MODE_READ), holder);
 	return result;
 }
 
@@ -2230,10 +2230,10 @@ static int cache_mngt_check_bdev(struct ocf_mngt_cache_device_config *cfg,
 	struct block_device *bdev;
 	int part_count;
 	bool is_part;
-	const struct ocf_volume_uuid *uuid = ocf_volume_get_uuid(device_cfg->volume);
+	const struct ocf_volume_uuid *uuid = ocf_volume_get_uuid(cfg->volume);
 
-	bdev = blkdev_get_by_path(uuid->data,
+	bdev = cas_blkdev_get_by_path(uuid->data,
-			(FMODE_EXCL|FMODE_READ), holder);
+			(CAS_BLK_MODE_EXCL | CAS_BLK_MODE_READ), holder);
 	if (IS_ERR(bdev)) {
 		return (PTR_ERR(bdev) == -EBUSY) ?
 				-OCF_ERR_NOT_OPEN_EXC :
@@ -2242,7 +2242,7 @@ static int cache_mngt_check_bdev(struct ocf_mngt_cache_device_config *cfg,
 
 	is_part = (cas_bdev_whole(bdev) != bdev);
 	part_count = cas_blk_get_part_count(bdev);
-	blkdev_put(bdev, (FMODE_EXCL|FMODE_READ));
+	cas_blkdev_put(bdev, (CAS_BLK_MODE_EXCL | CAS_BLK_MODE_READ), holder);
 
 	if (!is_part && part_count > 1 && !force)
 		return -KCAS_ERR_CONTAINS_PART;