blob: 959e6e936ad506870572a401c4b84123d2ee16f6 [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
Jorgen Lundman9b4a1f92012-07-19 20:48:25 +00002/*
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
Jorgen Lundman9b4a1f92012-07-19 20:48:25 +00005 */
6/*
7 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
8 */
9
10#ifndef _ZIO_H
11#define _ZIO_H
12
13#include <zfs/spa.h>
14
15#define ZEC_MAGIC 0x210da7ab10c7a11ULL /* zio data bloc tail */
16
17typedef struct zio_eck {
18 uint64_t zec_magic; /* for validation, endianness */
19 zio_cksum_t zec_cksum; /* 256-bit checksum */
20} zio_eck_t;
21
22/*
23 * Gang block headers are self-checksumming and contain an array
24 * of block pointers.
25 */
26#define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
27#define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
28 sizeof(zio_eck_t)) / sizeof(blkptr_t))
29#define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
30 sizeof(zio_eck_t) - \
31 (SPA_GBH_NBLKPTRS * sizeof(blkptr_t))) /\
32 sizeof(uint64_t))
33
34#define ZIO_GET_IOSIZE(zio) \
35 (BP_IS_GANG((zio)->io_bp) ? \
36 SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp))
37
38typedef struct zio_gbh {
39 blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
40 uint64_t zg_filler[SPA_GBH_FILLER];
41 zio_eck_t zg_tail;
42} zio_gbh_phys_t;
43
44enum zio_checksum {
45 ZIO_CHECKSUM_INHERIT = 0,
46 ZIO_CHECKSUM_ON,
47 ZIO_CHECKSUM_OFF,
48 ZIO_CHECKSUM_LABEL,
49 ZIO_CHECKSUM_GANG_HEADER,
50 ZIO_CHECKSUM_ZILOG,
51 ZIO_CHECKSUM_FLETCHER_2,
52 ZIO_CHECKSUM_FLETCHER_4,
53 ZIO_CHECKSUM_SHA256,
54 ZIO_CHECKSUM_ZILOG2,
55 ZIO_CHECKSUM_FUNCTIONS
56};
57
58#define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_2
59#define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
60
61enum zio_compress {
62 ZIO_COMPRESS_INHERIT = 0,
63 ZIO_COMPRESS_ON,
64 ZIO_COMPRESS_OFF,
65 ZIO_COMPRESS_LZJB,
66 ZIO_COMPRESS_EMPTY,
67 ZIO_COMPRESS_GZIP1,
68 ZIO_COMPRESS_GZIP2,
69 ZIO_COMPRESS_GZIP3,
70 ZIO_COMPRESS_GZIP4,
71 ZIO_COMPRESS_GZIP5,
72 ZIO_COMPRESS_GZIP6,
73 ZIO_COMPRESS_GZIP7,
74 ZIO_COMPRESS_GZIP8,
75 ZIO_COMPRESS_GZIP9,
76 ZIO_COMPRESS_FUNCTIONS
77};
78
79#endif /* _ZIO_H */