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 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
27 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
28 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
29 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
30 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);
31 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
32 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
33 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
34 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
35 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
36 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
37 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
38 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
39 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
40 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
41 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
42 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
43 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
44 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
45 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
46 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
47 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
48 50 : XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);
49 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8);
50 50 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
51 50 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
52 50 : XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
53 50 : XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
54 50 : XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
55 50 : XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
56 :
57 : /* dir/attr trees */
58 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
59 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80);
60 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
61 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
62 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
63 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
64 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
65 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
66 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
67 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
68 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
69 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
70 50 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
71 50 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
72 50 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
73 50 : 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 50 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
85 50 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
86 50 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
87 50 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
88 50 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
89 50 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
90 50 : XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
91 50 : XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 32);
92 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_attr_shortform, 4);
93 50 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0);
94 50 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count, 2);
95 50 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen, 4);
96 50 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen, 5);
97 50 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags, 6);
98 50 : XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval, 7);
99 50 : XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
100 50 : XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
101 50 : XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
102 50 : XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
103 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
104 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
105 50 : XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
106 50 : XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
107 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
108 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
109 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
110 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
111 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
112 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
113 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
114 50 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
115 50 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
116 50 : XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
117 50 : XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
118 :
119 : /* log structures */
120 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
121 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
122 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16);
123 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16);
124 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16);
125 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16);
126 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
127 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
128 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
129 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
130 50 : XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8);
131 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8);
132 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
133 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
134 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
135 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
136 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40);
137 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16);
138 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16);
139 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16);
140 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16);
141 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16);
142 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16);
143 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16);
144 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32);
145 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16);
146 :
147 50 : XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16);
148 50 : XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16);
149 50 : XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16);
150 50 : XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16);
151 50 : XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16);
152 50 : XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16);
153 :
154 : /* parent pointer ioctls */
155 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_rec, 24);
156 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_getparents, 96);
157 :
158 : /*
159 : * The v5 superblock format extended several v4 header structures with
160 : * additional data. While new fields are only accessible on v5
161 : * superblocks, it's important that the v5 structures place original v4
162 : * fields/headers in the correct location on-disk. For example, we must
163 : * be able to find magic values at the same location in certain blocks
164 : * regardless of superblock version.
165 : *
166 : * The following checks ensure that various v5 data structures place the
167 : * subset of v4 metadata associated with the same type of block at the
168 : * start of the on-disk block. If there is no data structure definition
169 : * for certain types of v4 blocks, traverse down to the first field of
170 : * common metadata (e.g., magic value) and make sure it is at offset
171 : * zero.
172 : */
173 50 : XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
174 50 : XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
175 50 : XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
176 50 : XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
177 50 : XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
178 :
179 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
180 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
181 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
182 50 : XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
183 :
184 : /*
185 : * Make sure the incore inode timestamp range corresponds to hand
186 : * converted values based on the ondisk format specification.
187 : */
188 50 : XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
189 : XFS_LEGACY_TIME_MIN);
190 50 : XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
191 : 16299260424LL);
192 :
193 : /* Do the same with the incore quota expiration range. */
194 50 : XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);
195 50 : XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,
196 : 16299260424LL);
197 : }
198 :
199 : #endif /* __XFS_ONDISK_H */
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