source: grub-pc/trunk/fuentes/include/grub/zfs/uberblock_impl.h @ 22

Last change on this file since 22 was 22, checked in by mabarracus, 4 years ago

updated version and apply net.ifnames=0 into debian/rules

File size: 2.2 KB
Line 
1/*
2 *  GRUB  --  GRand Unified Bootloader
3 *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
4 *
5 *  GRUB is free software; you can redistribute it and/or modify
6 *  it under the terms of the GNU General Public License as published by
7 *  the Free Software Foundation; either version 3 of the License, or
8 *  (at your option) any later version.
9 *
10 *  GRUB is distributed in the hope that it will be useful,
11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 *  GNU General Public License for more details.
14 *
15 *  You should have received a copy of the GNU General Public License
16 *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
17 */
18/*
19 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
20 * Use is subject to license terms.
21 */
22
23#ifndef _SYS_UBERBLOCK_IMPL_H
24#define _SYS_UBERBLOCK_IMPL_H
25
26/*
27 * The uberblock version is incremented whenever an incompatible on-disk
28 * format change is made to the SPA, DMU, or ZAP.
29 *
30 * Note: the first two fields should never be moved.  When a storage pool
31 * is opened, the uberblock must be read off the disk before the version
32 * can be checked.  If the ub_version field is moved, we may not detect
33 * version mismatch.  If the ub_magic field is moved, applications that
34 * expect the magic number in the first word won't work.
35 */
36#define UBERBLOCK_MAGIC         0x00bab10c              /* oo-ba-bloc!  */
37#define UBERBLOCK_SHIFT         10                      /* up to 1K     */
38
39typedef struct uberblock {
40        grub_uint64_t   ub_magic;       /* UBERBLOCK_MAGIC              */
41        grub_uint64_t   ub_version;     /* ZFS_VERSION                  */
42        grub_uint64_t   ub_txg;         /* txg of last sync             */
43        grub_uint64_t   ub_guid_sum;    /* sum of all vdev guids        */
44        grub_uint64_t   ub_timestamp;   /* UTC time of last sync        */
45        blkptr_t        ub_rootbp;      /* MOS objset_phys_t            */
46} uberblock_t;
47
48#define UBERBLOCK_SIZE          (1ULL << UBERBLOCK_SHIFT)
49#define VDEV_UBERBLOCK_SHIFT    UBERBLOCK_SHIFT
50
51/* XXX Uberblock_phys_t is no longer in the kernel zfs */
52typedef struct uberblock_phys {
53        uberblock_t     ubp_uberblock;
54        char            ubp_pad[UBERBLOCK_SIZE - sizeof (uberblock_t) -
55                                sizeof (zio_eck_t)];
56        zio_eck_t       ubp_zec;
57} uberblock_phys_t;
58
59
60#endif  /* _SYS_UBERBLOCK_IMPL_H */
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