/*   SPDX-License-Identifier: BSD-3-Clause
 *   Copyright (C) 2022 Intel Corporation.
 *   All rights reserved.
 */

#include "bdev_raid.h"

#include "spdk/log.h"

struct raid1_info {
	/* The parent raid bdev */
	struct raid_bdev *raid_bdev;
};

static void
raid1_submit_rw_request(struct raid_bdev_io *raid_io)
{
	raid_bdev_io_complete(raid_io, SPDK_BDEV_IO_STATUS_FAILED);
}

static int
raid1_start(struct raid_bdev *raid_bdev)
{
	uint64_t min_blockcnt = UINT64_MAX;
	struct raid_base_bdev_info *base_info;
	struct raid1_info *r1info;

	r1info = calloc(1, sizeof(*r1info));
	if (!r1info) {
		SPDK_ERRLOG("Failed to allocate RAID1 info device structure\n");
		return -ENOMEM;
	}
	r1info->raid_bdev = raid_bdev;

	RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
		min_blockcnt = spdk_min(min_blockcnt, base_info->bdev->blockcnt);
	}

	raid_bdev->bdev.blockcnt = min_blockcnt;
	raid_bdev->module_private = r1info;

	return 0;
}

static bool
raid1_stop(struct raid_bdev *raid_bdev)
{
	struct raid1_info *r1info = raid_bdev->module_private;

	free(r1info);

	return true;
}

static struct raid_bdev_module g_raid1_module = {
	.level = RAID1,
	.base_bdevs_min = 2,
	.base_bdevs_constraint = {CONSTRAINT_MIN_BASE_BDEVS_OPERATIONAL, 1},
	.start = raid1_start,
	.stop = raid1_stop,
	.submit_rw_request = raid1_submit_rw_request,
};
RAID_MODULE_REGISTER(&g_raid1_module)

SPDK_LOG_REGISTER_COMPONENT(bdev_raid1)