md: add a new callback pers->bitmap_sector()

JIRA: https://issues.redhat.com/browse/RHEL-73514

commit 0c984a2
Author: Yu Kuai <yukuai3@huawei.com>
Date:   Thu Jan 9 09:51:43 2025 +0800

    md: add a new callback pers->bitmap_sector()

    This callback will be used in raid5 to convert io ranges from array to
    bitmap.

    Signed-off-by: Yu Kuai <yukuai3@huawei.com>
    Reviewed-by: Xiao Ni <xni@redhat.com>
    Link: https://lore.kernel.org/r/20250109015145.158868-4-yukuai1@huaweicloud.com
    Signed-off-by: Song Liu <song@kernel.org>

Signed-off-by: Nigel Croxon <ncroxon@redhat.com>

Author: ncroxon

drivers/md/md.h

@@ -746,6 +746,9 @@ struct md_personality
 	void *(*takeover) (struct mddev *mddev);
 	/* Changes the consistency policy of an active array. */
 	int (*change_consistency_policy)(struct mddev *mddev, const char *buf);
+	/* convert io ranges from array to bitmap */
+	void (*bitmap_sector)(struct mddev *mddev, sector_t *offset,
+			      unsigned long *sectors);
 };
 
 struct md_sysfs_entry {