| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. |
| */ |
| /* |
| * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| |
| #ifndef _SYS_ZIL_H |
| #define _SYS_ZIL_H |
| |
| /* |
| * Intent log format: |
| * |
| * Each objset has its own intent log. The log header (zil_header_t) |
| * for objset N's intent log is kept in the Nth object of the SPA's |
| * intent_log objset. The log header points to a chain of log blocks, |
| * each of which contains log records (i.e., transactions) followed by |
| * a log block trailer (zil_trailer_t). The format of a log record |
| * depends on the record (or transaction) type, but all records begin |
| * with a common structure that defines the type, length, and txg. |
| */ |
| |
| /* |
| * Intent log header - this on disk structure holds fields to manage |
| * the log. All fields are 64 bit to easily handle cross architectures. |
| */ |
| typedef struct zil_header { |
| uint64_t zh_claim_txg; /* txg in which log blocks were claimed */ |
| uint64_t zh_replay_seq; /* highest replayed sequence number */ |
| blkptr_t zh_log; /* log chain */ |
| uint64_t zh_claim_seq; /* highest claimed sequence number */ |
| uint64_t zh_flags; /* header flags */ |
| uint64_t zh_pad[4]; |
| } zil_header_t; |
| |
| /* |
| * zh_flags bit settings |
| */ |
| #define ZIL_REPLAY_NEEDED 0x1 /* replay needed - internal only */ |
| |
| #endif /* _SYS_ZIL_H */ |
