| Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| Jorgen Lundman | 9b4a1f9 | 2012-07-19 20:48:25 +0000 | [diff] [blame] | 2 | /* |
| 3 | * GRUB -- GRand Unified Bootloader |
| 4 | * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. |
| Jorgen Lundman | 9b4a1f9 | 2012-07-19 20:48:25 +0000 | [diff] [blame] | 5 | */ |
| 6 | /* |
| 7 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
| 8 | * Use is subject to license terms. |
| 9 | */ |
| 10 | |
| 11 | #ifndef _SYS_ZIL_H |
| 12 | #define _SYS_ZIL_H |
| 13 | |
| 14 | /* |
| 15 | * Intent log format: |
| 16 | * |
| 17 | * Each objset has its own intent log. The log header (zil_header_t) |
| 18 | * for objset N's intent log is kept in the Nth object of the SPA's |
| 19 | * intent_log objset. The log header points to a chain of log blocks, |
| 20 | * each of which contains log records (i.e., transactions) followed by |
| 21 | * a log block trailer (zil_trailer_t). The format of a log record |
| 22 | * depends on the record (or transaction) type, but all records begin |
| 23 | * with a common structure that defines the type, length, and txg. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * Intent log header - this on disk structure holds fields to manage |
| 28 | * the log. All fields are 64 bit to easily handle cross architectures. |
| 29 | */ |
| 30 | typedef struct zil_header { |
| 31 | uint64_t zh_claim_txg; /* txg in which log blocks were claimed */ |
| 32 | uint64_t zh_replay_seq; /* highest replayed sequence number */ |
| 33 | blkptr_t zh_log; /* log chain */ |
| 34 | uint64_t zh_claim_seq; /* highest claimed sequence number */ |
| 35 | uint64_t zh_flags; /* header flags */ |
| 36 | uint64_t zh_pad[4]; |
| 37 | } zil_header_t; |
| 38 | |
| 39 | /* |
| 40 | * zh_flags bit settings |
| 41 | */ |
| 42 | #define ZIL_REPLAY_NEEDED 0x1 /* replay needed - internal only */ |
| 43 | |
| 44 | #endif /* _SYS_ZIL_H */ |