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1/*
2 * Copyright (c) 2016 Oracle.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef __XFS_ONDISK_H
19#define __XFS_ONDISK_H
20
21#define XFS_CHECK_STRUCT_SIZE(structname, size) \
22 BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \
23 #structname ") is wrong, expected " #size)
24
25#define XFS_CHECK_OFFSET(structname, member, off) \
26 BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \
27 "XFS: offsetof(" #structname ", " #member ") is wrong, " \
28 "expected " #off)
29
30static inline void __init
31xfs_check_ondisk_structs(void)
32{
33 /* ag/file structures */
34 XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
35 XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
36 XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
37 XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
38 XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 336);
39 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
40 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
41 XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
42 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
43 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
44 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
45 XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
46 XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
47 XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
48 XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
49 XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
50 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
51 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
52 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
53 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
54 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
55 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
56 XFS_CHECK_STRUCT_SIZE(struct xfs_timestamp, 8);
57 XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
58 XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
59 XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
60 XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
61 XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
62 XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
63
64 /* dir/attr trees */
65 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
66 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 88);
67 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
68 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
69 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
70 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
71 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
72 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
73 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
74 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
75 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
76 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
77 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
78 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
79 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
80 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
81
82 /*
83 * m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
84 * 4 bytes anyway so it's not obviously a problem. Hence for the moment
85 * we don't check this structure. This can be re-instated when the attr
86 * definitions are updated to use c99 VLA definitions.
87 *
88 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
89 */
90
91 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
92 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
93 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
94 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
95 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
96 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
97 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
98 XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 40);
99 XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.totsize, 0);
100 XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.count, 2);
101 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].namelen, 4);
102 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].valuelen, 5);
103 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].flags, 6);
104 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].nameval, 7);
105 XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
106 XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
107 XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
108 XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
109 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
110 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
111 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
112 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
113 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
114 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
115 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
116 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
117 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
118 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
119 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
120 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
121 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
122 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
123 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
124
125 /* log structures */
126 XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
127 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 28);
128 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 32);
129 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 28);
130 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 32);
131 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
132 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
133 XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
134 XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
135 XFS_CHECK_STRUCT_SIZE(struct xfs_ictimestamp, 8);
136 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
137 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
138 XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
139 XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
140}
141
142#endif /* __XFS_ONDISK_H */
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
18static inline void __init
19xfs_check_ondisk_structs(void)
20{
21 /* ag/file structures */
22 XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
23 XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
24 XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
25 XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
26 XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 336);
27 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
28 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
29 XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
30 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
31 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
32 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
33 XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
34 XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
35 XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
36 XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
37 XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
38 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
39 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
40 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
41 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
42 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
43 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
44 XFS_CHECK_STRUCT_SIZE(struct xfs_timestamp, 8);
45 XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
46 XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
47 XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
48 XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
49 XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
50 XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
51
52 /* dir/attr trees */
53 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
54 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 88);
55 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
56 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
57 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
58 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
59 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
60 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
61 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
62 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
63 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
64 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
65 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
66 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
67 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
68 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
69
70 /*
71 * m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
72 * 4 bytes anyway so it's not obviously a problem. Hence for the moment
73 * we don't check this structure. This can be re-instated when the attr
74 * definitions are updated to use c99 VLA definitions.
75 *
76 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
77 */
78
79 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
80 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
81 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
82 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
83 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
84 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
85 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
86 XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 40);
87 XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.totsize, 0);
88 XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.count, 2);
89 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].namelen, 4);
90 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].valuelen, 5);
91 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].flags, 6);
92 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].nameval, 7);
93 XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
94 XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
95 XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
96 XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
97 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
98 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
99 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
100 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
101 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
102 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
103 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
104 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
105 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
106 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
107 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
108 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
109 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
110 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
111 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
112
113 /* log structures */
114 XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
115 XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
116 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 28);
117 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 32);
118 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 28);
119 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 32);
120 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
121 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
122 XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
123 XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
124 XFS_CHECK_STRUCT_SIZE(struct xfs_ictimestamp, 8);
125 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
126 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
127 XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
128 XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
129
130 /*
131 * The v5 superblock format extended several v4 header structures with
132 * additional data. While new fields are only accessible on v5
133 * superblocks, it's important that the v5 structures place original v4
134 * fields/headers in the correct location on-disk. For example, we must
135 * be able to find magic values at the same location in certain blocks
136 * regardless of superblock version.
137 *
138 * The following checks ensure that various v5 data structures place the
139 * subset of v4 metadata associated with the same type of block at the
140 * start of the on-disk block. If there is no data structure definition
141 * for certain types of v4 blocks, traverse down to the first field of
142 * common metadata (e.g., magic value) and make sure it is at offset
143 * zero.
144 */
145 XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
146 XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
147 XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
148 XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
149 XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
150
151 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
152 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
153 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
154 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
155}
156
157#endif /* __XFS_ONDISK_H */