FreeBSD: Fix ZFS so that snapshots under .zfs/snapshot are NFS visible
[zfs.git] / include / sys / vdev_disk.h
blob02c583777ebc6e6b4fd730ce8344380ef12f30f8
1 /*
2 * CDDL HEADER START
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.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or https://opensource.org/licenses/CDDL-1.0.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
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]
19 * CDDL HEADER END
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.
26 * Copyright (c) 2018 by Delphix. All rights reserved.
29 #ifndef _SYS_VDEV_DISK_H
30 #define _SYS_VDEV_DISK_H
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.
40 #define NEW_START_BLOCK 2048
41 #define PARTITION_END_ALIGNMENT 2048
43 #ifdef _KERNEL
44 #include <sys/vdev.h>
45 #endif /* _KERNEL */
46 #endif /* _SYS_VDEV_DISK_H */