ia64/xen-unstable

view tools/libfsimage/zfs/zfs-include/dnode.h @ 19648:f0e2df69a8eb

x86 hvm: Allow cross-vendor migration

Intercept #UD and emulate SYSCALL/SYSENTER/SYSEXIT as necessary.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue May 26 15:01:36 2009 +0100 (2009-05-26)
parents 64f790e90d3d
children
line source
1 /*
2 * GRUB -- GRand Unified Bootloader
3 * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
4 *
5 * This program 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 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program 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 this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19 /*
20 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
21 * Use is subject to license terms.
22 */
24 #ifndef _SYS_DNODE_H
25 #define _SYS_DNODE_H
27 /*
28 * Fixed constants.
29 */
30 #define DNODE_SHIFT 9 /* 512 bytes */
31 #define DN_MIN_INDBLKSHIFT 10 /* 1k */
32 #define DN_MAX_INDBLKSHIFT 14 /* 16k */
33 #define DNODE_BLOCK_SHIFT 14 /* 16k */
34 #define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */
35 #define DN_MAX_OBJECT_SHIFT 48 /* 256 trillion (zfs_fid_t limit) */
36 #define DN_MAX_OFFSET_SHIFT 64 /* 2^64 bytes in a dnode */
38 /*
39 * Derived constants.
40 */
41 #define DNODE_SIZE (1 << DNODE_SHIFT)
42 #define DN_MAX_NBLKPTR ((DNODE_SIZE - DNODE_CORE_SIZE) >> SPA_BLKPTRSHIFT)
43 #define DN_MAX_BONUSLEN (DNODE_SIZE - DNODE_CORE_SIZE - (1 << SPA_BLKPTRSHIFT))
44 #define DN_MAX_OBJECT (1ULL << DN_MAX_OBJECT_SHIFT)
46 #define DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT)
47 #define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT)
48 #define DNODES_PER_LEVEL_SHIFT (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT)
50 #define DN_BONUS(dnp) ((void*)((dnp)->dn_bonus + \
51 (((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t))))
53 typedef struct dnode_phys {
54 uint8_t dn_type; /* dmu_object_type_t */
55 uint8_t dn_indblkshift; /* ln2(indirect block size) */
56 uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */
57 uint8_t dn_nblkptr; /* length of dn_blkptr */
58 uint8_t dn_bonustype; /* type of data in bonus buffer */
59 uint8_t dn_checksum; /* ZIO_CHECKSUM type */
60 uint8_t dn_compress; /* ZIO_COMPRESS type */
61 uint8_t dn_flags; /* DNODE_FLAG_* */
62 uint16_t dn_datablkszsec; /* data block size in 512b sectors */
63 uint16_t dn_bonuslen; /* length of dn_bonus */
64 uint8_t dn_pad2[4];
66 /* accounting is protected by dn_dirty_mtx */
67 uint64_t dn_maxblkid; /* largest allocated block ID */
68 uint64_t dn_used; /* bytes (or sectors) of disk space */
70 uint64_t dn_pad3[4];
72 blkptr_t dn_blkptr[1];
73 uint8_t dn_bonus[DN_MAX_BONUSLEN];
74 } dnode_phys_t;
76 #endif /* _SYS_DNODE_H */