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 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
27 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
28 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
29 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
30 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);
31 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
32 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
33 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
34 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
35 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
36 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
37 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
38 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
39 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
40 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
41 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
42 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
43 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
44 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
45 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
46 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
47 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
48 59 : XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);
49 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8);
50 59 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
51 59 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
52 59 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
53 59 : XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
54 59 : XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
55 59 : XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
56 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rtsb, 104);
57 :
58 : /* dir/attr trees */
59 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
60 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80);
61 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
62 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
63 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
64 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
65 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
66 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
67 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
68 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
69 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
70 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
71 59 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
72 59 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
73 59 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
74 59 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
75 :
76 : /* realtime structures */
77 59 : XFS_CHECK_STRUCT_SIZE(union xfs_rtword_ondisk, 4);
78 59 : XFS_CHECK_STRUCT_SIZE(union xfs_suminfo_ondisk, 4);
79 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rtbuf_blkinfo, 48);
80 59 : XFS_CHECK_STRUCT_SIZE(xfs_rtrmap_ptr_t, 8);
81 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rtrmap_root, 4);
82 59 : XFS_CHECK_STRUCT_SIZE(xfs_rtrefcount_ptr_t, 8);
83 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rtrefcount_root, 4);
84 :
85 : /*
86 : * m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
87 : * 4 bytes anyway so it's not obviously a problem. Hence for the moment
88 : * we don't check this structure. This can be re-instated when the attr
89 : * definitions are updated to use c99 VLA definitions.
90 : *
91 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
92 : */
93 :
94 59 : XFS_CHECK_OFFSET(struct xfs_dsb, sb_crc, 224);
95 59 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
96 59 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
97 59 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
98 59 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
99 59 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
100 59 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
101 59 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
102 59 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 32);
103 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr_shortform, 4);
104 59 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0);
105 59 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count, 2);
106 59 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen, 4);
107 59 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen, 5);
108 59 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags, 6);
109 59 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval, 7);
110 59 : XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
111 59 : XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
112 59 : XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
113 59 : XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
114 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
115 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
116 59 : XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
117 59 : XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
118 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
119 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
120 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
121 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
122 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
123 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
124 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
125 59 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
126 59 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
127 59 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
128 59 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
129 :
130 : /* log structures */
131 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
132 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
133 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16);
134 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16);
135 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16);
136 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16);
137 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
138 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
139 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
140 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
141 59 : XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8);
142 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8);
143 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
144 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
145 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
146 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
147 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40);
148 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16);
149 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16);
150 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16);
151 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16);
152 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16);
153 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16);
154 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16);
155 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32);
156 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16);
157 :
158 59 : XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16);
159 59 : XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16);
160 59 : XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16);
161 59 : XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16);
162 59 : XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16);
163 59 : XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16);
164 :
165 : /* parent pointer ioctls */
166 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_rec, 24);
167 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_getparents, 96);
168 :
169 : /*
170 : * The v5 superblock format extended several v4 header structures with
171 : * additional data. While new fields are only accessible on v5
172 : * superblocks, it's important that the v5 structures place original v4
173 : * fields/headers in the correct location on-disk. For example, we must
174 : * be able to find magic values at the same location in certain blocks
175 : * regardless of superblock version.
176 : *
177 : * The following checks ensure that various v5 data structures place the
178 : * subset of v4 metadata associated with the same type of block at the
179 : * start of the on-disk block. If there is no data structure definition
180 : * for certain types of v4 blocks, traverse down to the first field of
181 : * common metadata (e.g., magic value) and make sure it is at offset
182 : * zero.
183 : */
184 59 : XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
185 59 : XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
186 59 : XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
187 59 : XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
188 59 : XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
189 :
190 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
191 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
192 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
193 59 : XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
194 :
195 : /*
196 : * Make sure the incore inode timestamp range corresponds to hand
197 : * converted values based on the ondisk format specification.
198 : */
199 59 : XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
200 : XFS_LEGACY_TIME_MIN);
201 59 : XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
202 : 16299260424LL);
203 :
204 : /* Do the same with the incore quota expiration range. */
205 59 : XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);
206 59 : XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,
207 : 16299260424LL);
208 : }
209 :
210 : #endif /* __XFS_ONDISK_H */
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