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