14d3c95f5SJorgen Lundman /* 24d3c95f5SJorgen Lundman * GRUB -- GRand Unified Bootloader 34d3c95f5SJorgen Lundman * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 44d3c95f5SJorgen Lundman * 5*1a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 64d3c95f5SJorgen Lundman */ 74d3c95f5SJorgen Lundman /* 84d3c95f5SJorgen Lundman * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 94d3c95f5SJorgen Lundman * Use is subject to license terms. 104d3c95f5SJorgen Lundman */ 114d3c95f5SJorgen Lundman 124d3c95f5SJorgen Lundman #ifndef _SYS_ZIL_H 134d3c95f5SJorgen Lundman #define _SYS_ZIL_H 144d3c95f5SJorgen Lundman 154d3c95f5SJorgen Lundman /* 164d3c95f5SJorgen Lundman * Intent log format: 174d3c95f5SJorgen Lundman * 184d3c95f5SJorgen Lundman * Each objset has its own intent log. The log header (zil_header_t) 194d3c95f5SJorgen Lundman * for objset N's intent log is kept in the Nth object of the SPA's 204d3c95f5SJorgen Lundman * intent_log objset. The log header points to a chain of log blocks, 214d3c95f5SJorgen Lundman * each of which contains log records (i.e., transactions) followed by 224d3c95f5SJorgen Lundman * a log block trailer (zil_trailer_t). The format of a log record 234d3c95f5SJorgen Lundman * depends on the record (or transaction) type, but all records begin 244d3c95f5SJorgen Lundman * with a common structure that defines the type, length, and txg. 254d3c95f5SJorgen Lundman */ 264d3c95f5SJorgen Lundman 274d3c95f5SJorgen Lundman /* 284d3c95f5SJorgen Lundman * Intent log header - this on disk structure holds fields to manage 294d3c95f5SJorgen Lundman * the log. All fields are 64 bit to easily handle cross architectures. 304d3c95f5SJorgen Lundman */ 314d3c95f5SJorgen Lundman typedef struct zil_header { 324d3c95f5SJorgen Lundman uint64_t zh_claim_txg; /* txg in which log blocks were claimed */ 334d3c95f5SJorgen Lundman uint64_t zh_replay_seq; /* highest replayed sequence number */ 344d3c95f5SJorgen Lundman blkptr_t zh_log; /* log chain */ 354d3c95f5SJorgen Lundman uint64_t zh_claim_seq; /* highest claimed sequence number */ 364d3c95f5SJorgen Lundman uint64_t zh_flags; /* header flags */ 374d3c95f5SJorgen Lundman uint64_t zh_pad[4]; 384d3c95f5SJorgen Lundman } zil_header_t; 394d3c95f5SJorgen Lundman 404d3c95f5SJorgen Lundman /* 414d3c95f5SJorgen Lundman * zh_flags bit settings 424d3c95f5SJorgen Lundman */ 434d3c95f5SJorgen Lundman #define ZIL_REPLAY_NEEDED 0x1 /* replay needed - internal only */ 444d3c95f5SJorgen Lundman 454d3c95f5SJorgen Lundman #endif /* _SYS_ZIL_H */ 46