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review.shift-gmbh.com / SHIFTPHONES / kernel / common / 2a39946c984464e4aac82c556ba9915589be7323 / . / fs / xfs / xfs_ondisk.h
blob: acb9b737fe6bf5e9c790e630c7dfe4f134d0ecc5 [file] [log] [blame]
Dave Chinner0b61f8a2018-06-05 19:42:14 -0700[diff] [blame]1// SPDX-License-Identifier: GPL-2.0
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]2/*
3 * Copyright (c) 2016 Oracle.
4 * All Rights Reserved.
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]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
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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);
Darrick J. Wong2a399462020-08-17 09:58:01 -0700[diff] [blame^]26 XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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);
Hou Taoad703282016-07-20 10:43:11 +1000[diff] [blame]30 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
31 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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);
Darrick J. Wong1946b912016-10-03 09:11:18 -0700[diff] [blame]40 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
41 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
Darrick J. Wong035e00a2016-08-03 11:36:07 +1000[diff] [blame]42 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
43 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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);
Darrick J. Wong1946b912016-10-03 09:11:18 -0700[diff] [blame]49 XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
Darrick J. Wong035e00a2016-08-03 11:36:07 +1000[diff] [blame]50 XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]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);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]86 XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 40);
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]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);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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);
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]99 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
100 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]101 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
102 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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);
Darrick J. Wong3f94c442016-06-21 11:53:28 +1000[diff] [blame]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);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]111 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]112
113 /* log structures */
Darrick J. Wongb7df5e92020-01-07 16:12:25 -0800[diff] [blame]114 XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]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);
Dave Chinner20413e372017-10-09 11:37:22 -0700[diff] [blame]126 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]127 XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
128 XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
Brian Foster670105d2019-02-08 09:02:29 -0800[diff] [blame]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);
Darrick J. Wong7035f972019-07-03 20:36:26 -0700[diff] [blame]150
151 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
Darrick J. Wong5f19c7f2019-07-03 20:36:27 -0700[diff] [blame]152 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700[diff] [blame]153 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
Darrick J. Wongfba97602019-07-03 20:36:28 -0700[diff] [blame]154 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
Darrick J. Wong30cbc592016-03-09 08:15:14 +1100[diff] [blame]155}
156
157#endif /* __XFS_ONDISK_H */