Kernel 6.0 support

This patch introduces kernel 6.0 support for Open CAS

Signed-off-by: Krzysztof Majzerowicz-Jaszcz <krzysztof.majzerowicz-jaszcz@intel.com>

configure.d/1_cleanup_disk.conf

@@ -0,0 +1,45 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# 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 "blk_cleanup_disk(NULL);" "linux/blk-mq.h"
+	then
+		echo $cur_name 1 >> $config_file_path
+	else
+		echo $cur_name 2 >> $config_file_path
+	fi
+}
+
+apply() {
+    case "$1" in
+    "1")
+        add_function "
+        static inline void cas_cleanup_disk(struct gendisk *gd)
+        {
+		blk_cleanup_disk(gd);
+	}"
+	;;
+
+    "2")
+
+	add_function "
+	static inline void cas_cleanup_disk(struct gendisk *gd)
+	{
+		put_disk(gd);
+	}"
+	;;
+
+    *)
+        exit 1
+    esac
+}
+
+conf_run $@

configure.d/1_cleanup_queue.conf

@@ -0,0 +1,45 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# 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 "blk_cleanup_queue(NULL);" "linux/blk-mq.h"
+	then
+		echo $cur_name 1 >> $config_file_path
+	else
+		echo $cur_name 2 >> $config_file_path
+	fi
+}
+
+apply() {
+    case "$1" in
+    "1")
+        add_function "
+        static inline void cas_cleanup_queue(struct request_queue *q)
+        {
+		blk_cleanup_queue(q);
+	}"
+	;;
+
+    "2")
+
+	add_function "
+	static inline void cas_cleanup_queue(struct request_queue *q)
+	{
+		blk_mq_destroy_queue(q);
+	}"
+	;;
+
+    *)
+        exit 1
+    esac
+}
+
+conf_run $@

configure.d/1_has_discard_support.conf

@@ -0,0 +1,46 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# 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 request_queue q;blk_queue_discard(&q);" "linux/blk-mq.h"
+	then
+		echo $cur_name 1 >> $config_file_path
+	else
+		echo $cur_name 2 >> $config_file_path
+	fi
+}
+
+apply() {
+    case "$1" in
+    "1")
+        add_function "
+        static inline int cas_has_discard_support(struct block_device *bd)
+        {
+		struct request_queue *q = bdev_get_queue(bd);
+		return (int)blk_queue_discard(q);
+	}"
+	;;
+
+    "2")
+
+	add_function "
+        static inline int cas_has_discard_support(struct block_device *bd)
+	{
+		return !!bdev_max_discard_sectors(bd);
+	}"
+	;;
+
+    *)
+        exit 1
+    esac
+}
+
+conf_run $@

configure.d/2_alloc_disk.conf

@@ -36,7 +36,7 @@ apply() {
 	add_function "
 	static inline void cas_cleanup_mq_disk(struct cas_exp_obj *exp_obj)
 	{
-		blk_cleanup_disk(exp_obj->gd);
+		cas_cleanup_disk(exp_obj->gd);
 	}"
 	;;
 

configure.d/2_set_discard_flag.conf

@@ -0,0 +1,45 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2022 Intel Corporation
+# 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 "QUEUE_FLAG_DISCARD;" "linux/blk-mq.h"
+	then
+		echo $cur_name 1 >> $config_file_path
+	else
+		echo $cur_name 2 >> $config_file_path
+	fi
+}
+
+apply() {
+    case "$1" in
+    "1")
+        add_function "
+        static inline void cas_set_discard_flag(struct request_queue *q)
+        {
+		CAS_QUEUE_FLAG_SET(QUEUE_FLAG_DISCARD, q);
+	}"
+	;;
+
+    "2")
+
+	add_function "
+	static inline void cas_set_discard_flag(struct request_queue *q)
+	{
+		(void)q;
+	}"
+	;;
+
+    *)
+        exit 1
+    esac
+}
+
+conf_run $@

modules/cas_cache/exp_obj.c

@@ -535,7 +535,7 @@ int cas_exp_obj_destroy(struct cas_disk *dsk)
 	del_gendisk(exp_obj->gd);
 
 	if (exp_obj->queue)
-		blk_cleanup_queue(exp_obj->queue);
+		cas_cleanup_queue(exp_obj->queue);
 
 	blk_mq_free_tag_set(&exp_obj->tag_set);
 

modules/cas_cache/volume/vol_block_dev_bottom.c

@@ -218,7 +218,7 @@ void block_dev_submit_discard(struct ocf_io *io)
 		goto out;
 	}
 
-	if (!blk_queue_discard(q)) {
+	if (!cas_has_discard_support(bd)) {
 		/* Discard is not supported by bottom device, send completion
 		 * to caller
 		 */

modules/cas_cache/volume/vol_block_dev_top.c

@@ -64,10 +64,10 @@ static void blkdev_set_discard_properties(ocf_cache_t cache,
 	core_q = bdev_get_queue(core_bd);
 	cache_q = bdev_get_queue(cache_bd);
 
-	CAS_QUEUE_FLAG_SET(QUEUE_FLAG_DISCARD, exp_q);
+	cas_set_discard_flag(exp_q);
 
 	CAS_SET_DISCARD_ZEROES_DATA(exp_q->limits, 0);
-	if (core_q && blk_queue_discard(core_q)) {
+	if (core_q && cas_has_discard_support(core_bd)) {
 		blk_queue_max_discard_sectors(exp_q, core_q->limits.max_discard_sectors);
 		exp_q->limits.discard_alignment =
 			bdev_discard_alignment(core_bd);