Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0
2 : /*
3 : * Copyright (c) 2016 Oracle.
4 : * All Rights Reserved.
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 :
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 :
18 : #define XFS_CHECK_VALUE(value, expected) \
19 : BUILD_BUG_ON_MSG((value) != (expected), \
20 : "XFS: value of " #value " is wrong, expected " #expected)
21 :
22 : static inline void __init
23 : xfs_check_ondisk_structs(void)
24 : {
25 : /* ag/file structures */
26 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
27 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
28 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
29 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
30 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);
31 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
32 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
33 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
34 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
35 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
36 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
37 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
38 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
39 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
40 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
41 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
42 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
43 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
44 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
45 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
46 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
47 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
48 12 : XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);
49 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8);
50 12 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
51 12 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
52 12 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
53 12 : XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
54 12 : XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
55 12 : XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
56 :
57 : /* dir/attr trees */
58 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
59 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80);
60 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
61 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
62 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
63 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
64 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
65 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
66 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
67 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
68 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
69 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
70 12 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
71 12 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
72 12 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
73 12 : 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 :
84 12 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
85 12 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
86 12 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
87 12 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
88 12 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
89 12 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
90 12 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
91 12 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 32);
92 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr_shortform, 4);
93 12 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0);
94 12 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count, 2);
95 12 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen, 4);
96 12 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen, 5);
97 12 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags, 6);
98 12 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval, 7);
99 12 : XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
100 12 : XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
101 12 : XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
102 12 : XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
103 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
104 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
105 12 : XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
106 12 : XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
107 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
108 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
109 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
110 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
111 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
112 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
113 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
114 12 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
115 12 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
116 12 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
117 12 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
118 :
119 : /* log structures */
120 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
121 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
122 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16);
123 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16);
124 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16);
125 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16);
126 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
127 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
128 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
129 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
130 12 : XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8);
131 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8);
132 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
133 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
134 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
135 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
136 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40);
137 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16);
138 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16);
139 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16);
140 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16);
141 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16);
142 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16);
143 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16);
144 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32);
145 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16);
146 :
147 12 : XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16);
148 12 : XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16);
149 12 : XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16);
150 12 : XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16);
151 12 : XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16);
152 12 : XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16);
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 12 : XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
170 12 : XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
171 12 : XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
172 12 : XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
173 12 : XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
174 :
175 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
176 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
177 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
178 12 : XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
179 :
180 : /*
181 : * Make sure the incore inode timestamp range corresponds to hand
182 : * converted values based on the ondisk format specification.
183 : */
184 12 : XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
185 : XFS_LEGACY_TIME_MIN);
186 12 : XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
187 : 16299260424LL);
188 :
189 : /* Do the same with the incore quota expiration range. */
190 12 : XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);
191 12 : XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,
192 : 16299260424LL);
193 : }
194 :
195 : #endif /* __XFS_ONDISK_H */
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