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xfs_ondisk.h
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linux-6.19.14/fs/xfs/libxfs/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 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 22#define XFS_CHECK_SB_OFFSET(field, offset) \ 23 XFS_CHECK_OFFSET(struct xfs_dsb, field, offset); \ 24 XFS_CHECK_OFFSET(struct xfs_sb, field, offset); 25 26static inline void __init 27xfs_check_ondisk_structs(void) 28{ 29 /* file structures */ 30 XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4); 31 XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12); 32 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8); 33 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16); 34 XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4); 35 XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176); 36 XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104); 37 XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136); 38 XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56); 39 XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8); 40 XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8); 41 42 /* space btrees */ 43 XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224); 44 XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36); 45 XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344); 46 XFS_CHECK_STRUCT_SIZE(struct xfs_alloc_rec, 8); 47 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72); 48 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64); 49 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48); 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(xfs_alloc_key_t, 8); 57 XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4); 58 XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4); 59 XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4); 60 XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4); 61 XFS_CHECK_STRUCT_SIZE(xfs_bmdr_key_t, 8); 62 63 /* dir/attr trees */ 64 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80); 65 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80); 66 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56); 67 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56); 68 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64); 69 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64); 70 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48); 71 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64); 72 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64); 73 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64); 74 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64); 75 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64); 76 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_entry, 8); 77 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_hdr, 32); 78 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_map, 4); 79 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_name_local, 4); 80 81 /* realtime structures */ 82 XFS_CHECK_STRUCT_SIZE(struct xfs_rtsb, 56); 83 XFS_CHECK_STRUCT_SIZE(union xfs_rtword_raw, 4); 84 XFS_CHECK_STRUCT_SIZE(union xfs_suminfo_raw, 4); 85 XFS_CHECK_STRUCT_SIZE(struct xfs_rtbuf_blkinfo, 48); 86 XFS_CHECK_STRUCT_SIZE(xfs_rtrmap_ptr_t, 8); 87 XFS_CHECK_STRUCT_SIZE(struct xfs_rtrmap_root, 4); 88 XFS_CHECK_STRUCT_SIZE(xfs_rtrefcount_ptr_t, 8); 89 XFS_CHECK_STRUCT_SIZE(struct xfs_rtrefcount_root, 4); 90 91 /* 92 * m68k has problems with struct xfs_attr_leaf_name_remote, but we pad 93 * it to 4 bytes anyway so it's not obviously a problem. Hence for the 94 * moment we don't check this structure. This can be re-instated when 95 * the attr definitions are updated to use c99 VLA definitions. 96 * 97 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_name_remote, 12); 98 */ 99 100 XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_local, valuelen, 0); 101 XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_local, namelen, 2); 102 XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_local, nameval, 3); 103 XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, valueblk, 0); 104 XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, valuelen, 4); 105 XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, namelen, 8); 106 XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, name, 9); 107 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leafblock, 32); 108 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_sf_hdr, 4); 109 XFS_CHECK_OFFSET(struct xfs_attr_sf_hdr, totsize, 0); 110 XFS_CHECK_OFFSET(struct xfs_attr_sf_hdr, count, 2); 111 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, namelen, 0); 112 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, valuelen, 1); 113 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, flags, 2); 114 XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, nameval, 3); 115 XFS_CHECK_STRUCT_SIZE(struct xfs_da_blkinfo, 12); 116 XFS_CHECK_STRUCT_SIZE(struct xfs_da_intnode, 16); 117 XFS_CHECK_STRUCT_SIZE(struct xfs_da_node_entry, 8); 118 XFS_CHECK_STRUCT_SIZE(struct xfs_da_node_hdr, 16); 119 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_free, 4); 120 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_hdr, 16); 121 XFS_CHECK_OFFSET(struct xfs_dir2_data_unused, freetag, 0); 122 XFS_CHECK_OFFSET(struct xfs_dir2_data_unused, length, 2); 123 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free_hdr, 16); 124 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free, 16); 125 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_entry, 8); 126 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_hdr, 16); 127 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf, 16); 128 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_tail, 4); 129 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_entry, 3); 130 XFS_CHECK_OFFSET(struct xfs_dir2_sf_entry, namelen, 0); 131 XFS_CHECK_OFFSET(struct xfs_dir2_sf_entry, offset, 1); 132 XFS_CHECK_OFFSET(struct xfs_dir2_sf_entry, name, 3); 133 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_hdr, 10); 134 XFS_CHECK_STRUCT_SIZE(struct xfs_parent_rec, 12); 135 136 /* ondisk dir/attr structures from xfs/122 */ 137 XFS_CHECK_STRUCT_SIZE(struct xfs_attr_sf_entry, 3); 138 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_free, 4); 139 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_hdr, 16); 140 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_unused, 6); 141 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free, 16); 142 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free_hdr, 16); 143 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf, 16); 144 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_entry, 8); 145 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_hdr, 16); 146 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_tail, 4); 147 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_entry, 3); 148 XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_hdr, 10); 149 150 /* log structures */ 151 XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88); 152 XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24); 153 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16); 154 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16); 155 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16); 156 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16); 157 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12); 158 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16); 159 XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176); 160 XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28); 161 XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8); 162 XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8); 163 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52); 164 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56); 165 XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20); 166 XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16); 167 XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40); 168 XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16); 169 XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16); 170 XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16); 171 XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16); 172 XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16); 173 XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16); 174 XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16); 175 XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32); 176 XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16); 177 XFS_CHECK_STRUCT_SIZE(struct xlog_rec_header, 512); 178 XFS_CHECK_STRUCT_SIZE(struct xlog_rec_ext_header, 512); 179 180 XFS_CHECK_OFFSET(struct xlog_rec_header, h_reserved, 328); 181 XFS_CHECK_OFFSET(struct xlog_rec_ext_header, xh_reserved, 260); 182 XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16); 183 XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16); 184 XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16); 185 XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16); 186 XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16); 187 XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16); 188 189 /* ondisk log structures from xfs/122 */ 190 XFS_CHECK_STRUCT_SIZE(struct xfs_unmount_log_format, 8); 191 XFS_CHECK_STRUCT_SIZE(struct xfs_xmd_log_format, 16); 192 XFS_CHECK_STRUCT_SIZE(struct xfs_xmi_log_format, 88); 193 194 /* parent pointer ioctls */ 195 XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_rec, 32); 196 XFS_CHECK_STRUCT_SIZE(struct xfs_getparents, 40); 197 XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_by_handle, 64); 198 199 /* 200 * The v5 superblock format extended several v4 header structures with 201 * additional data. While new fields are only accessible on v5 202 * superblocks, it's important that the v5 structures place original v4 203 * fields/headers in the correct location on-disk. For example, we must 204 * be able to find magic values at the same location in certain blocks 205 * regardless of superblock version. 206 * 207 * The following checks ensure that various v5 data structures place the 208 * subset of v4 metadata associated with the same type of block at the 209 * start of the on-disk block. If there is no data structure definition 210 * for certain types of v4 blocks, traverse down to the first field of 211 * common metadata (e.g., magic value) and make sure it is at offset 212 * zero. 213 */ 214 XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0); 215 XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0); 216 XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0); 217 XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0); 218 XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0); 219 220 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192); 221 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24); 222 XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64); 223 XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64); 224 225 /* 226 * Make sure the incore inode timestamp range corresponds to hand 227 * converted values based on the ondisk format specification. 228 */ 229 XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET, 230 XFS_LEGACY_TIME_MIN); 231 XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET, 232 16299260424LL); 233 234 /* Do the same with the incore quota expiration range. */ 235 XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4); 236 XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT, 237 16299260424LL); 238 239 /* superblock field checks we got from xfs/122 */ 240 XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 304); 241 XFS_CHECK_STRUCT_SIZE(struct xfs_sb, 304); 242 XFS_CHECK_SB_OFFSET(sb_magicnum, 0); 243 XFS_CHECK_SB_OFFSET(sb_blocksize, 4); 244 XFS_CHECK_SB_OFFSET(sb_dblocks, 8); 245 XFS_CHECK_SB_OFFSET(sb_rblocks, 16); 246 XFS_CHECK_SB_OFFSET(sb_rextents, 24); 247 XFS_CHECK_SB_OFFSET(sb_uuid, 32); 248 XFS_CHECK_SB_OFFSET(sb_logstart, 48); 249 XFS_CHECK_SB_OFFSET(sb_rootino, 56); 250 XFS_CHECK_SB_OFFSET(sb_rbmino, 64); 251 XFS_CHECK_SB_OFFSET(sb_rsumino, 72); 252 XFS_CHECK_SB_OFFSET(sb_rextsize, 80); 253 XFS_CHECK_SB_OFFSET(sb_agblocks, 84); 254 XFS_CHECK_SB_OFFSET(sb_agcount, 88); 255 XFS_CHECK_SB_OFFSET(sb_rbmblocks, 92); 256 XFS_CHECK_SB_OFFSET(sb_logblocks, 96); 257 XFS_CHECK_SB_OFFSET(sb_versionnum, 100); 258 XFS_CHECK_SB_OFFSET(sb_sectsize, 102); 259 XFS_CHECK_SB_OFFSET(sb_inodesize, 104); 260 XFS_CHECK_SB_OFFSET(sb_inopblock, 106); 261 XFS_CHECK_SB_OFFSET(sb_blocklog, 120); 262 XFS_CHECK_SB_OFFSET(sb_fname[12], 120); 263 XFS_CHECK_SB_OFFSET(sb_sectlog, 121); 264 XFS_CHECK_SB_OFFSET(sb_inodelog, 122); 265 XFS_CHECK_SB_OFFSET(sb_inopblog, 123); 266 XFS_CHECK_SB_OFFSET(sb_agblklog, 124); 267 XFS_CHECK_SB_OFFSET(sb_rextslog, 125); 268 XFS_CHECK_SB_OFFSET(sb_inprogress, 126); 269 XFS_CHECK_SB_OFFSET(sb_imax_pct, 127); 270 XFS_CHECK_SB_OFFSET(sb_icount, 128); 271 XFS_CHECK_SB_OFFSET(sb_ifree, 136); 272 XFS_CHECK_SB_OFFSET(sb_fdblocks, 144); 273 XFS_CHECK_SB_OFFSET(sb_frextents, 152); 274 XFS_CHECK_SB_OFFSET(sb_uquotino, 160); 275 XFS_CHECK_SB_OFFSET(sb_gquotino, 168); 276 XFS_CHECK_SB_OFFSET(sb_qflags, 176); 277 XFS_CHECK_SB_OFFSET(sb_flags, 178); 278 XFS_CHECK_SB_OFFSET(sb_shared_vn, 179); 279 XFS_CHECK_SB_OFFSET(sb_inoalignmt, 180); 280 XFS_CHECK_SB_OFFSET(sb_unit, 184); 281 XFS_CHECK_SB_OFFSET(sb_width, 188); 282 XFS_CHECK_SB_OFFSET(sb_dirblklog, 192); 283 XFS_CHECK_SB_OFFSET(sb_logsectlog, 193); 284 XFS_CHECK_SB_OFFSET(sb_logsectsize, 194); 285 XFS_CHECK_SB_OFFSET(sb_logsunit, 196); 286 XFS_CHECK_SB_OFFSET(sb_features2, 200); 287 XFS_CHECK_SB_OFFSET(sb_bad_features2, 204); 288 XFS_CHECK_SB_OFFSET(sb_features_compat, 208); 289 XFS_CHECK_SB_OFFSET(sb_features_ro_compat, 212); 290 XFS_CHECK_SB_OFFSET(sb_features_incompat, 216); 291 XFS_CHECK_SB_OFFSET(sb_features_log_incompat, 220); 292 XFS_CHECK_SB_OFFSET(sb_crc, 224); 293 XFS_CHECK_SB_OFFSET(sb_spino_align, 228); 294 XFS_CHECK_SB_OFFSET(sb_pquotino, 232); 295 XFS_CHECK_SB_OFFSET(sb_lsn, 240); 296 XFS_CHECK_SB_OFFSET(sb_meta_uuid, 248); 297 XFS_CHECK_SB_OFFSET(sb_metadirino, 264); 298 XFS_CHECK_SB_OFFSET(sb_rgcount, 272); 299 XFS_CHECK_SB_OFFSET(sb_rgextents, 276); 300 XFS_CHECK_SB_OFFSET(sb_rgblklog, 280); 301 XFS_CHECK_SB_OFFSET(sb_pad, 281); 302 XFS_CHECK_SB_OFFSET(sb_rtstart, 288); 303 XFS_CHECK_SB_OFFSET(sb_rtreserved, 296); 304} 305 306#endif /* __XFS_ONDISK_H */
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