[mirror_zfs.git] / include / sys / vdev_disk.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (C) 2008-2010 Lawrence Livermore National Security, LLC.
 * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
 * LLNL-CODE-403049.
 * Copyright (c) 2018 by Delphix. All rights reserved.
 */

#ifndef _SYS_VDEV_DISK_H
#define	_SYS_VDEV_DISK_H

/*
 * Don't start the slice at the default block of 34; many storage
 * devices will use a stripe width of 128k, other vendors prefer a 1m
 * alignment.  It is best to play it safe and ensure a 1m alignment
 * given 512B blocks.  When the block size is larger by a power of 2
 * we will still be 1m aligned.  Some devices are sensitive to the
 * partition ending alignment as well.
 */
#define	NEW_START_BLOCK		2048
#define	PARTITION_END_ALIGNMENT	2048

#ifdef _KERNEL
#include <sys/vdev.h>

typedef struct vdev_disk {
	ddi_devid_t		vd_devid;
	char			*vd_minor;
	struct block_device	*vd_bdev;
	krwlock_t		vd_lock;
} vdev_disk_t;

#endif /* _KERNEL */
#endif /* _SYS_VDEV_DISK_H */
Commit	Line	Data
60101509 BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21	/*
	22	* Copyright (C) 2008-2010 Lawrence Livermore National Security, LLC.
	23	* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
	24	* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
	25	* LLNL-CODE-403049.
74d42600	26	* Copyright (c) 2018 by Delphix. All rights reserved.
60101509 BB	27	*/
	28
	29	#ifndef _SYS_VDEV_DISK_H
d1d7e268	30	#define _SYS_VDEV_DISK_H
60101509	31
74d42600 SH	32	/*
	33	* Don't start the slice at the default block of 34; many storage
	34	* devices will use a stripe width of 128k, other vendors prefer a 1m
	35	* alignment. It is best to play it safe and ensure a 1m alignment
	36	* given 512B blocks. When the block size is larger by a power of 2
	37	* we will still be 1m aligned. Some devices are sensitive to the
	38	* partition ending alignment as well.
	39	*/
	40	#define NEW_START_BLOCK 2048
	41	#define PARTITION_END_ALIGNMENT 2048
	42
60101509 BB	43	#ifdef _KERNEL
60101509 BB	44	#include <sys/vdev.h>
60101509 BB	45
	46	typedef struct vdev_disk {
	47	ddi_devid_t vd_devid;
	48	char *vd_minor;
	49	struct block_device *vd_bdev;
d441e85d	50	krwlock_t vd_lock;
60101509 BB	51	} vdev_disk_t;
60101509 BB	52
60101509	53	#endif /* _KERNEL */
61e90960	54	#endif /* _SYS_VDEV_DISK_H */