1*4d3c95f5SJorgen Lundman /* 2*4d3c95f5SJorgen Lundman * GRUB -- GRand Unified Bootloader 3*4d3c95f5SJorgen Lundman * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4*4d3c95f5SJorgen Lundman * 5*4d3c95f5SJorgen Lundman * This program is free software; you can redistribute it and/or modify 6*4d3c95f5SJorgen Lundman * it under the terms of the GNU General Public License as published by 7*4d3c95f5SJorgen Lundman * the Free Software Foundation; either version 2 of the License, or 8*4d3c95f5SJorgen Lundman * (at your option) any later version. 9*4d3c95f5SJorgen Lundman * 10*4d3c95f5SJorgen Lundman * This program is distributed in the hope that it will be useful, 11*4d3c95f5SJorgen Lundman * but WITHOUT ANY WARRANTY; without even the implied warranty of 12*4d3c95f5SJorgen Lundman * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13*4d3c95f5SJorgen Lundman * GNU General Public License for more details. 14*4d3c95f5SJorgen Lundman * 15*4d3c95f5SJorgen Lundman * You should have received a copy of the GNU General Public License 16*4d3c95f5SJorgen Lundman * along with this program; if not, write to the Free Software 17*4d3c95f5SJorgen Lundman * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18*4d3c95f5SJorgen Lundman */ 19*4d3c95f5SJorgen Lundman /* 20*4d3c95f5SJorgen Lundman * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 21*4d3c95f5SJorgen Lundman * Use is subject to license terms. 22*4d3c95f5SJorgen Lundman */ 23*4d3c95f5SJorgen Lundman 24*4d3c95f5SJorgen Lundman #ifndef _SYS_ZIL_H 25*4d3c95f5SJorgen Lundman #define _SYS_ZIL_H 26*4d3c95f5SJorgen Lundman 27*4d3c95f5SJorgen Lundman /* 28*4d3c95f5SJorgen Lundman * Intent log format: 29*4d3c95f5SJorgen Lundman * 30*4d3c95f5SJorgen Lundman * Each objset has its own intent log. The log header (zil_header_t) 31*4d3c95f5SJorgen Lundman * for objset N's intent log is kept in the Nth object of the SPA's 32*4d3c95f5SJorgen Lundman * intent_log objset. The log header points to a chain of log blocks, 33*4d3c95f5SJorgen Lundman * each of which contains log records (i.e., transactions) followed by 34*4d3c95f5SJorgen Lundman * a log block trailer (zil_trailer_t). The format of a log record 35*4d3c95f5SJorgen Lundman * depends on the record (or transaction) type, but all records begin 36*4d3c95f5SJorgen Lundman * with a common structure that defines the type, length, and txg. 37*4d3c95f5SJorgen Lundman */ 38*4d3c95f5SJorgen Lundman 39*4d3c95f5SJorgen Lundman /* 40*4d3c95f5SJorgen Lundman * Intent log header - this on disk structure holds fields to manage 41*4d3c95f5SJorgen Lundman * the log. All fields are 64 bit to easily handle cross architectures. 42*4d3c95f5SJorgen Lundman */ 43*4d3c95f5SJorgen Lundman typedef struct zil_header { 44*4d3c95f5SJorgen Lundman uint64_t zh_claim_txg; /* txg in which log blocks were claimed */ 45*4d3c95f5SJorgen Lundman uint64_t zh_replay_seq; /* highest replayed sequence number */ 46*4d3c95f5SJorgen Lundman blkptr_t zh_log; /* log chain */ 47*4d3c95f5SJorgen Lundman uint64_t zh_claim_seq; /* highest claimed sequence number */ 48*4d3c95f5SJorgen Lundman uint64_t zh_flags; /* header flags */ 49*4d3c95f5SJorgen Lundman uint64_t zh_pad[4]; 50*4d3c95f5SJorgen Lundman } zil_header_t; 51*4d3c95f5SJorgen Lundman 52*4d3c95f5SJorgen Lundman /* 53*4d3c95f5SJorgen Lundman * zh_flags bit settings 54*4d3c95f5SJorgen Lundman */ 55*4d3c95f5SJorgen Lundman #define ZIL_REPLAY_NEEDED 0x1 /* replay needed - internal only */ 56*4d3c95f5SJorgen Lundman 57*4d3c95f5SJorgen Lundman #endif /* _SYS_ZIL_H */ 58