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review.shift-gmbh.com / SHIFTPHONES / kernel / common / refs/heads/android12-5.10-lts / . / fs / xfs / xfs_ondisk.h
blob: 0aa87c2101049c59fdb3ab145c5bcac9f0174354 [file] [log] [blame]
Dave Chinner0b61f8a2018-06-05 19:42:14 -0700[diff] [blame]1// SPDX-License-Identifier: GPL-2.0
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]2/*
3 * Copyright (c) 2016 Oracle.
4 * All Rights Reserved.
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]5 */
6#ifndef __XFS_ONDISK_H
7#define __XFS_ONDISK_H
8
9#define XFS_CHECK_STRUCT_SIZE(structname, size) \
10 BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \
11 #structname ") is wrong, expected " #size)
12
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]13#define XFS_CHECK_OFFSET(structname, member, off) \
14 BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \
15 "XFS: offsetof(" #structname ", " #member ") is wrong, " \
16 "expected " #off)
17
Darrick J. Wongf93e54362020-08-17 09:59:07 -0700[diff] [blame]18#define XFS_CHECK_VALUE(value, expected) \
19 BUILD_BUG_ON_MSG((value) != (expected), \
20 "XFS: value of " #value " is wrong, expected " #expected)
21
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]22static inline void __init
23xfs_check_ondisk_structs(void)
24{
25 /* ag/file structures */
26 XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
27 XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
28 XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
29 XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
Darrick J. Wong2a399462020-08-17 09:58:01 -0700[diff] [blame]30 XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]31 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
32 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
33 XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
Hou Taoad703282016-07-20 10:43:11 +1000[diff] [blame]34 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
35 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]36 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
37 XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
38 XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
39 XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
40 XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
41 XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
42 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
43 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
Darrick J. Wong1946b912016-10-03 09:11:18 -0700[diff] [blame]44 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
45 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
Darrick J. Wong035e00a2016-08-03 11:36:07 +1000[diff] [blame]46 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
47 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
Darrick J. Wong5a0bb062020-08-24 15:15:46 -0700[diff] [blame]48 XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);
49 XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]50 XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
51 XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
52 XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
53 XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
Darrick J. Wong1946b912016-10-03 09:11:18 -0700[diff] [blame]54 XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
Darrick J. Wong035e00a2016-08-03 11:36:07 +1000[diff] [blame]55 XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]56
57 /* dir/attr trees */
58 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
59 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 88);
60 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
61 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
62 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
63 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
64 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
65 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
66 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
67 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
68 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
69 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
70 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
71 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
72 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
73 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
74
75 /*
76 * m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
77 * 4 bytes anyway so it's not obviously a problem. Hence for the moment
78 * we don't check this structure. This can be re-instated when the attr
79 * definitions are updated to use c99 VLA definitions.
80 *
81 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
82 */
83
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]84 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
85 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
86 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
87 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
88 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
89 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
90 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]91 XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 40);
Carlos Maiolino47e6cc12020-09-04 09:51:31 -0700[diff] [blame]92 XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0);
93 XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count, 2);
94 XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen, 4);
95 XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen, 5);
96 XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags, 6);
97 XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval, 7);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]98 XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
99 XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
100 XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
101 XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
102 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
103 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]104 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
105 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]106 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
107 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]108 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
109 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
110 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
111 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
112 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]113 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
114 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
115 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]116 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]117
118 /* log structures */
Darrick J. Wongb7df5e92020-01-07 16:12:25 -0800[diff] [blame]119 XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]120 XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
121 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 28);
122 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 32);
123 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 28);
124 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 32);
125 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
126 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
127 XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
128 XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
Darrick J. Wong30e05592020-08-24 16:01:34 -0700[diff] [blame]129 XFS_CHECK_STRUCT_SIZE(xfs_ictimestamp_t, 8);
130 XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_ictimestamp, 8);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]131 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
Dave Chinner20413e372017-10-09 11:37:22 -0700[diff] [blame]132 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]133 XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
134 XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
Brian Foster670105d2019-02-08 09:02:29 -0800[diff] [blame]135
136 /*
137 * The v5 superblock format extended several v4 header structures with
138 * additional data. While new fields are only accessible on v5
139 * superblocks, it's important that the v5 structures place original v4
140 * fields/headers in the correct location on-disk. For example, we must
141 * be able to find magic values at the same location in certain blocks
142 * regardless of superblock version.
143 *
144 * The following checks ensure that various v5 data structures place the
145 * subset of v4 metadata associated with the same type of block at the
146 * start of the on-disk block. If there is no data structure definition
147 * for certain types of v4 blocks, traverse down to the first field of
148 * common metadata (e.g., magic value) and make sure it is at offset
149 * zero.
150 */
151 XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
152 XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
153 XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
154 XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
155 XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
Darrick J. Wong7035f972019-07-03 20:36:26 -0700[diff] [blame]156
157 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
Darrick J. Wong5f19c7f2019-07-03 20:36:27 -0700[diff] [blame]158 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700[diff] [blame]159 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
Darrick J. Wongfba97602019-07-03 20:36:28 -0700[diff] [blame]160 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
Darrick J. Wongf93e54362020-08-17 09:59:07 -0700[diff] [blame]161
162 /*
163 * Make sure the incore inode timestamp range corresponds to hand
164 * converted values based on the ondisk format specification.
165 */
166 XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
167 XFS_LEGACY_TIME_MIN);
168 XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
169 16299260424LL);
Darrick J. Wong4ea1ff32020-08-17 09:59:51 -0700[diff] [blame]170
171 /* Do the same with the incore quota expiration range. */
172 XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);
173 XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,
174 16299260424LL);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]175}
176
177#endif /* __XFS_ONDISK_H */