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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2016 Oracle.4 * All Rights Reserved.5 */6#ifndef __XFS_ONDISK_H7#define __XFS_ONDISK_H8 9#define XFS_CHECK_STRUCT_SIZE(structname, size) \10 static_assert(sizeof(structname) == (size), \11 "XFS: sizeof(" #structname ") is wrong, expected " #size)12 13#define XFS_CHECK_OFFSET(structname, member, off) \14 static_assert(offsetof(structname, member) == (off), \15 "XFS: offsetof(" #structname ", " #member ") is wrong, " \16 "expected " #off)17 18#define XFS_CHECK_VALUE(value, expected) \19 static_assert((value) == (expected), \20 "XFS: value of " #value " is wrong, expected " #expected)21 22static inline void __init23xfs_check_ondisk_structs(void)24{25 /* ag/file structures */26 XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);27 XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);28 XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);29 XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);30 XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);31 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);32 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);33 XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);34 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);35 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);36 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);37 XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);38 XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);39 XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);40 XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);41 XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);42 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);43 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);44 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);45 XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);46 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);47 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);48 XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);49 XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8);50 XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);51 XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);52 XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);53 XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);54 XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);55 XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);56 57 /* dir/attr trees */58 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);59 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80);60 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);61 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);62 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);63 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);64 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);65 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);66 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);67 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);68 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);69 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);70 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);71 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);72 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);73 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);74 75 /* realtime structures */76 XFS_CHECK_STRUCT_SIZE(union xfs_rtword_raw, 4);77 XFS_CHECK_STRUCT_SIZE(union xfs_suminfo_raw, 4);78 79 /*80 * m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to81 * 4 bytes anyway so it's not obviously a problem. Hence for the moment82 * we don't check this structure. This can be re-instated when the attr83 * definitions are updated to use c99 VLA definitions.84 *85 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);86 */87 88 XFS_CHECK_OFFSET(struct xfs_dsb, sb_crc, 224);89 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);90 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);91 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);92 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);93 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);94 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);95 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);96 XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 32);97 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_sf_hdr, 4);98 XFS_CHECK_OFFSET(struct xfs_attr_sf_hdr, totsize, 0);99 XFS_CHECK_OFFSET(struct xfs_attr_sf_hdr, count, 2);100 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, namelen, 0);101 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, valuelen, 1);102 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, flags, 2);103 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, nameval, 3);104 XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);105 XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);106 XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);107 XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);108 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);109 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);110 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);111 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);112 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);113 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);114 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);115 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);116 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);117 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);118 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);119 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);120 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);121 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);122 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);123 XFS_CHECK_STRUCT_SIZE(struct xfs_parent_rec, 12);124 125 /* log structures */126 XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);127 XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);128 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16);129 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16);130 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16);131 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16);132 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);133 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);134 XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);135 XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);136 XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8);137 XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8);138 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);139 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);140 XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);141 XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);142 XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40);143 XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16);144 XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16);145 XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16);146 XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16);147 XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16);148 XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16);149 XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16);150 XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32);151 XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16);152 153 XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16);154 XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16);155 XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16);156 XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16);157 XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16);158 XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16);159 160 /* parent pointer ioctls */161 XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_rec, 32);162 XFS_CHECK_STRUCT_SIZE(struct xfs_getparents, 40);163 XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_by_handle, 64);164 165 /*166 * The v5 superblock format extended several v4 header structures with167 * additional data. While new fields are only accessible on v5168 * superblocks, it's important that the v5 structures place original v4169 * fields/headers in the correct location on-disk. For example, we must170 * be able to find magic values at the same location in certain blocks171 * regardless of superblock version.172 *173 * The following checks ensure that various v5 data structures place the174 * subset of v4 metadata associated with the same type of block at the175 * start of the on-disk block. If there is no data structure definition176 * for certain types of v4 blocks, traverse down to the first field of177 * common metadata (e.g., magic value) and make sure it is at offset178 * zero.179 */180 XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);181 XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);182 XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);183 XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);184 XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);185 186 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);187 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);188 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);189 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);190 191 /*192 * Make sure the incore inode timestamp range corresponds to hand193 * converted values based on the ondisk format specification.194 */195 XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,196 XFS_LEGACY_TIME_MIN);197 XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,198 16299260424LL);199 200 /* Do the same with the incore quota expiration range. */201 XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);202 XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,203 16299260424LL);204}205 206#endif /* __XFS_ONDISK_H */207