mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-26 05:34:30 +08:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
/*
|
|
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
#ifndef _SYS_DNODE_H
|
|
#define _SYS_DNODE_H
|
|
|
|
#include <zfs/spa.h>
|
|
|
|
/*
|
|
* Fixed constants.
|
|
*/
|
|
#define DNODE_SHIFT 9 /* 512 bytes */
|
|
#define DN_MIN_INDBLKSHIFT 10 /* 1k */
|
|
#define DN_MAX_INDBLKSHIFT 14 /* 16k */
|
|
#define DNODE_BLOCK_SHIFT 14 /* 16k */
|
|
#define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */
|
|
#define DN_MAX_OBJECT_SHIFT 48 /* 256 trillion (zfs_fid_t limit) */
|
|
#define DN_MAX_OFFSET_SHIFT 64 /* 2^64 bytes in a dnode */
|
|
|
|
/*
|
|
* Derived constants.
|
|
*/
|
|
#define DNODE_SIZE (1 << DNODE_SHIFT)
|
|
#define DN_MAX_NBLKPTR ((DNODE_SIZE - DNODE_CORE_SIZE) >> SPA_BLKPTRSHIFT)
|
|
#define DN_MAX_BONUSLEN (DNODE_SIZE - DNODE_CORE_SIZE - (1 << SPA_BLKPTRSHIFT))
|
|
#define DN_MAX_OBJECT (1ULL << DN_MAX_OBJECT_SHIFT)
|
|
|
|
#define DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT)
|
|
#define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT)
|
|
#define DNODES_PER_LEVEL_SHIFT (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT)
|
|
|
|
#define DNODE_FLAG_SPILL_BLKPTR (1<<2)
|
|
|
|
#define DN_BONUS(dnp) ((void *)((dnp)->dn_bonus + \
|
|
(((dnp)->dn_nblkptr - 1) * sizeof(blkptr_t))))
|
|
|
|
typedef struct dnode_phys {
|
|
uint8_t dn_type; /* dmu_object_type_t */
|
|
uint8_t dn_indblkshift; /* ln2(indirect block size) */
|
|
uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */
|
|
uint8_t dn_nblkptr; /* length of dn_blkptr */
|
|
uint8_t dn_bonustype; /* type of data in bonus buffer */
|
|
uint8_t dn_checksum; /* ZIO_CHECKSUM type */
|
|
uint8_t dn_compress; /* ZIO_COMPRESS type */
|
|
uint8_t dn_flags; /* DNODE_FLAG_* */
|
|
uint16_t dn_datablkszsec; /* data block size in 512b sectors */
|
|
uint16_t dn_bonuslen; /* length of dn_bonus */
|
|
uint8_t dn_pad2[4];
|
|
|
|
/* accounting is protected by dn_dirty_mtx */
|
|
uint64_t dn_maxblkid; /* largest allocated block ID */
|
|
uint64_t dn_used; /* bytes (or sectors) of disk space */
|
|
|
|
uint64_t dn_pad3[4];
|
|
|
|
blkptr_t dn_blkptr[1];
|
|
uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof(blkptr_t)];
|
|
blkptr_t dn_spill;
|
|
} dnode_phys_t;
|
|
|
|
#endif /* _SYS_DNODE_H */
|