1N/A/*
1N/A * GRUB -- GRand Unified Bootloader
1N/A * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
1N/A *
1N/A * This program is free software; you can redistribute it and/or modify
1N/A * it under the terms of the GNU General Public License as published by
1N/A * the Free Software Foundation; either version 2 of the License, or
1N/A * (at your option) any later version.
1N/A *
1N/A * This program is distributed in the hope that it will be useful,
1N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
1N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1N/A * GNU General Public License for more details.
1N/A *
1N/A * You should have received a copy of the GNU General Public License
1N/A * along with this program; if not, write to the Free Software
1N/A * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
1N/A */
1N/A/*
1N/A * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
1N/A * Use is subject to license terms.
1N/A */
1N/A
1N/A#ifndef _SYS_ZIL_H
1N/A#define _SYS_ZIL_H
1N/A
1N/A/*
1N/A * Intent log format:
1N/A *
1N/A * Each objset has its own intent log. The log header (zil_header_t)
1N/A * for objset N's intent log is kept in the Nth object of the SPA's
1N/A * intent_log objset. The log header points to a chain of log blocks,
1N/A * each of which contains log records (i.e., transactions) followed by
1N/A * a log block trailer (zil_trailer_t). The format of a log record
1N/A * depends on the record (or transaction) type, but all records begin
1N/A * with a common structure that defines the type, length, and txg.
1N/A */
1N/A
1N/A/*
1N/A * Intent log header - this on disk structure holds fields to manage
1N/A * the log. All fields are 64 bit to easily handle cross architectures.
1N/A */
1N/Atypedef struct zil_header {
1N/A uint64_t zh_claim_txg; /* txg in which log blocks were claimed */
1N/A uint64_t zh_replay_seq; /* highest replayed sequence number */
1N/A blkptr_t zh_log; /* log chain */
1N/A uint64_t zh_claim_seq; /* highest claimed sequence number */
1N/A uint64_t zh_flags; /* header flags */
1N/A uint64_t zh_pad[4];
1N/A} zil_header_t;
1N/A
1N/A/*
1N/A * zh_flags bit settings
1N/A */
1N/A#define ZIL_REPLAY_NEEDED 0x1 /* replay needed - internal only */
1N/A
1N/A#endif /* _SYS_ZIL_H */