/*
|
* GRUB -- GRand Unified Bootloader
|
* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
|
*
|
* SPDX-License-Identifier: GPL-2.0+
|
*/
|
/*
|
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
|
* Use is subject to license terms.
|
*/
|
|
#ifndef _SYS_ZIL_H
|
#define _SYS_ZIL_H
|
|
/*
|
* Intent log format:
|
*
|
* Each objset has its own intent log. The log header (zil_header_t)
|
* for objset N's intent log is kept in the Nth object of the SPA's
|
* intent_log objset. The log header points to a chain of log blocks,
|
* each of which contains log records (i.e., transactions) followed by
|
* a log block trailer (zil_trailer_t). The format of a log record
|
* depends on the record (or transaction) type, but all records begin
|
* with a common structure that defines the type, length, and txg.
|
*/
|
|
/*
|
* Intent log header - this on disk structure holds fields to manage
|
* the log. All fields are 64 bit to easily handle cross architectures.
|
*/
|
typedef struct zil_header {
|
uint64_t zh_claim_txg; /* txg in which log blocks were claimed */
|
uint64_t zh_replay_seq; /* highest replayed sequence number */
|
blkptr_t zh_log; /* log chain */
|
uint64_t zh_claim_seq; /* highest claimed sequence number */
|
uint64_t zh_flags; /* header flags */
|
uint64_t zh_pad[4];
|
} zil_header_t;
|
|
/*
|
* zh_flags bit settings
|
*/
|
#define ZIL_REPLAY_NEEDED 0x1 /* replay needed - internal only */
|
|
#endif /* _SYS_ZIL_H */
|
