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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
30cbc591 DW |
2 | /* |
3 | * Copyright (c) 2016 Oracle. | |
4 | * All Rights Reserved. | |
30cbc591 DW |
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 | ||
3f94c441 DW |
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 | ||
f93e5436 DW |
18 | #define XFS_CHECK_VALUE(value, expected) \ |
19 | BUILD_BUG_ON_MSG((value) != (expected), \ | |
20 | "XFS: value of " #value " is wrong, expected " #expected) | |
21 | ||
30cbc591 DW |
22 | static inline void __init |
23 | xfs_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); | |
2a39946c | 30 | XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344); |
30cbc591 DW |
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); | |
ad70328a HT |
34 | XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48); |
35 | XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64); | |
30cbc591 DW |
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); | |
1946b91c DW |
44 | XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4); |
45 | XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12); | |
035e00ac DW |
46 | XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20); |
47 | XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24); | |
5a0bb066 DW |
48 | XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8); |
49 | XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8); | |
30cbc591 DW |
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); | |
1946b91c | 54 | XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4); |
035e00ac | 55 | XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4); |
30cbc591 DW |
56 | |
57 | /* dir/attr trees */ | |
58 | XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80); | |
a49bbce5 | 59 | XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80); |
30cbc591 DW |
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 | ||
3f94c441 DW |
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); | |
a49bbce5 | 91 | XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 32); |
f6250e20 | 92 | XFS_CHECK_STRUCT_SIZE(struct xfs_attr_shortform, 4); |
47e6cc10 CM |
93 | XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0); |
94 | XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count, 2); | |
95 | XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen, 4); | |
96 | XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen, 5); | |
97 | XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags, 6); | |
98 | XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval, 7); | |
30cbc591 DW |
99 | XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12); |
100 | XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16); | |
101 | XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8); | |
102 | XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16); | |
103 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4); | |
104 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16); | |
3f94c441 DW |
105 | XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0); |
106 | XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2); | |
30cbc591 DW |
107 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16); |
108 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16); | |
30cbc591 DW |
109 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8); |
110 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16); | |
111 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16); | |
112 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4); | |
113 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3); | |
3f94c441 DW |
114 | XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0); |
115 | XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1); | |
116 | XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3); | |
30cbc591 | 117 | XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10); |
30cbc591 DW |
118 | |
119 | /* log structures */ | |
b7df5e92 | 120 | XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88); |
30cbc591 | 121 | XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24); |
03a7485c DW |
122 | XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16); |
123 | XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16); | |
124 | XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16); | |
125 | XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16); | |
30cbc591 DW |
126 | XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12); |
127 | XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16); | |
128 | XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176); | |
129 | XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28); | |
6fc277c7 | 130 | XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8); |
732de7db | 131 | XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8); |
30cbc591 | 132 | XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52); |
20413e37 | 133 | XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56); |
30cbc591 DW |
134 | XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20); |
135 | XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16); | |
fd920008 AH |
136 | XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40); |
137 | XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16); | |
a38ebce1 DW |
138 | XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16); |
139 | XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16); | |
a38935c0 DW |
140 | XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16); |
141 | XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16); | |
b45ca961 DW |
142 | XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16); |
143 | XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16); | |
a38ebce1 | 144 | XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32); |
a38935c0 | 145 | XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16); |
a38ebce1 DW |
146 | |
147 | XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16); | |
a38935c0 | 148 | XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16); |
b45ca961 | 149 | XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16); |
03a7485c DW |
150 | XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16); |
151 | XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16); | |
152 | XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16); | |
670105de BF |
153 | |
154 | /* | |
155 | * The v5 superblock format extended several v4 header structures with | |
156 | * additional data. While new fields are only accessible on v5 | |
157 | * superblocks, it's important that the v5 structures place original v4 | |
158 | * fields/headers in the correct location on-disk. For example, we must | |
159 | * be able to find magic values at the same location in certain blocks | |
160 | * regardless of superblock version. | |
161 | * | |
162 | * The following checks ensure that various v5 data structures place the | |
163 | * subset of v4 metadata associated with the same type of block at the | |
164 | * start of the on-disk block. If there is no data structure definition | |
165 | * for certain types of v4 blocks, traverse down to the first field of | |
166 | * common metadata (e.g., magic value) and make sure it is at offset | |
167 | * zero. | |
168 | */ | |
169 | XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0); | |
170 | XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0); | |
171 | XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0); | |
172 | XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0); | |
173 | XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0); | |
7035f972 DW |
174 | |
175 | XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192); | |
5f19c7fc | 176 | XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24); |
0448b6f4 | 177 | XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64); |
fba9760a | 178 | XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64); |
f93e5436 DW |
179 | |
180 | /* | |
181 | * Make sure the incore inode timestamp range corresponds to hand | |
182 | * converted values based on the ondisk format specification. | |
183 | */ | |
184 | XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET, | |
185 | XFS_LEGACY_TIME_MIN); | |
186 | XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET, | |
187 | 16299260424LL); | |
4ea1ff3b DW |
188 | |
189 | /* Do the same with the incore quota expiration range. */ | |
190 | XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4); | |
191 | XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT, | |
192 | 16299260424LL); | |
30cbc591 DW |
193 | } |
194 | ||
195 | #endif /* __XFS_ONDISK_H */ |