| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2016 Oracle. |
| * All Rights Reserved. |
| */ |
| #ifndef __XFS_ONDISK_H |
| #define __XFS_ONDISK_H |
| |
| #define XFS_CHECK_STRUCT_SIZE(structname, size) \ |
| static_assert(sizeof(structname) == (size), \ |
| "XFS: sizeof(" #structname ") is wrong, expected " #size) |
| |
| #define XFS_CHECK_OFFSET(structname, member, off) \ |
| static_assert(offsetof(structname, member) == (off), \ |
| "XFS: offsetof(" #structname ", " #member ") is wrong, " \ |
| "expected " #off) |
| |
| #define XFS_CHECK_VALUE(value, expected) \ |
| static_assert((value) == (expected), \ |
| "XFS: value of " #value " is wrong, expected " #expected) |
| |
| #define XFS_CHECK_SB_OFFSET(field, offset) \ |
| XFS_CHECK_OFFSET(struct xfs_dsb, field, offset); \ |
| XFS_CHECK_OFFSET(struct xfs_sb, field, offset); |
| |
| static inline void __init |
| xfs_check_ondisk_structs(void) |
| { |
| /* file structures */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56); |
| XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8); |
| |
| /* space btrees */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_alloc_rec, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24); |
| XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8); |
| XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_bmdr_key_t, 8); |
| |
| /* dir/attr trees */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_entry, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_hdr, 32); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_map, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_name_local, 4); |
| |
| /* realtime structures */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rtsb, 56); |
| XFS_CHECK_STRUCT_SIZE(union xfs_rtword_raw, 4); |
| XFS_CHECK_STRUCT_SIZE(union xfs_suminfo_raw, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rtbuf_blkinfo, 48); |
| XFS_CHECK_STRUCT_SIZE(xfs_rtrmap_ptr_t, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rtrmap_root, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_rtrefcount_ptr_t, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rtrefcount_root, 4); |
| |
| /* |
| * m68k has problems with struct xfs_attr_leaf_name_remote, but we pad |
| * it to 4 bytes anyway so it's not obviously a problem. Hence for the |
| * moment we don't check this structure. This can be re-instated when |
| * the attr definitions are updated to use c99 VLA definitions. |
| * |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leaf_name_remote, 12); |
| */ |
| |
| XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_local, valuelen, 0); |
| XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_local, namelen, 2); |
| XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_local, nameval, 3); |
| XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, valueblk, 0); |
| XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, valuelen, 4); |
| XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, namelen, 8); |
| XFS_CHECK_OFFSET(struct xfs_attr_leaf_name_remote, name, 9); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_leafblock, 32); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_sf_hdr, 4); |
| XFS_CHECK_OFFSET(struct xfs_attr_sf_hdr, totsize, 0); |
| XFS_CHECK_OFFSET(struct xfs_attr_sf_hdr, count, 2); |
| XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, namelen, 0); |
| XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, valuelen, 1); |
| XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, flags, 2); |
| XFS_CHECK_OFFSET(struct xfs_attr_sf_entry, nameval, 3); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_da_blkinfo, 12); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_da_intnode, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_da_node_entry, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_da_node_hdr, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_free, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_hdr, 16); |
| XFS_CHECK_OFFSET(struct xfs_dir2_data_unused, freetag, 0); |
| XFS_CHECK_OFFSET(struct xfs_dir2_data_unused, length, 2); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free_hdr, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_entry, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_hdr, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_tail, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_entry, 3); |
| XFS_CHECK_OFFSET(struct xfs_dir2_sf_entry, namelen, 0); |
| XFS_CHECK_OFFSET(struct xfs_dir2_sf_entry, offset, 1); |
| XFS_CHECK_OFFSET(struct xfs_dir2_sf_entry, name, 3); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_hdr, 10); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_parent_rec, 12); |
| |
| /* ondisk dir/attr structures from xfs/122 */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attr_sf_entry, 3); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_free, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_hdr, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_data_unused, 6); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_free_hdr, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_entry, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_hdr, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_leaf_tail, 4); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_entry, 3); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dir2_sf_hdr, 10); |
| |
| /* log structures */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28); |
| XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16); |
| |
| XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16); |
| XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16); |
| XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16); |
| XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16); |
| XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16); |
| XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16); |
| |
| /* ondisk log structures from xfs/122 */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_unmount_log_format, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_xmd_log_format, 16); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_xmi_log_format, 88); |
| |
| /* parent pointer ioctls */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_rec, 32); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_getparents, 40); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_by_handle, 64); |
| |
| /* |
| * The v5 superblock format extended several v4 header structures with |
| * additional data. While new fields are only accessible on v5 |
| * superblocks, it's important that the v5 structures place original v4 |
| * fields/headers in the correct location on-disk. For example, we must |
| * be able to find magic values at the same location in certain blocks |
| * regardless of superblock version. |
| * |
| * The following checks ensure that various v5 data structures place the |
| * subset of v4 metadata associated with the same type of block at the |
| * start of the on-disk block. If there is no data structure definition |
| * for certain types of v4 blocks, traverse down to the first field of |
| * common metadata (e.g., magic value) and make sure it is at offset |
| * zero. |
| */ |
| XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0); |
| XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0); |
| XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0); |
| XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0); |
| XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0); |
| |
| XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64); |
| |
| /* |
| * Make sure the incore inode timestamp range corresponds to hand |
| * converted values based on the ondisk format specification. |
| */ |
| XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET, |
| XFS_LEGACY_TIME_MIN); |
| XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET, |
| 16299260424LL); |
| |
| /* Do the same with the incore quota expiration range. */ |
| XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4); |
| XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT, |
| 16299260424LL); |
| |
| /* superblock field checks we got from xfs/122 */ |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 288); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_sb, 288); |
| XFS_CHECK_SB_OFFSET(sb_magicnum, 0); |
| XFS_CHECK_SB_OFFSET(sb_blocksize, 4); |
| XFS_CHECK_SB_OFFSET(sb_dblocks, 8); |
| XFS_CHECK_SB_OFFSET(sb_rblocks, 16); |
| XFS_CHECK_SB_OFFSET(sb_rextents, 24); |
| XFS_CHECK_SB_OFFSET(sb_uuid, 32); |
| XFS_CHECK_SB_OFFSET(sb_logstart, 48); |
| XFS_CHECK_SB_OFFSET(sb_rootino, 56); |
| XFS_CHECK_SB_OFFSET(sb_rbmino, 64); |
| XFS_CHECK_SB_OFFSET(sb_rsumino, 72); |
| XFS_CHECK_SB_OFFSET(sb_rextsize, 80); |
| XFS_CHECK_SB_OFFSET(sb_agblocks, 84); |
| XFS_CHECK_SB_OFFSET(sb_agcount, 88); |
| XFS_CHECK_SB_OFFSET(sb_rbmblocks, 92); |
| XFS_CHECK_SB_OFFSET(sb_logblocks, 96); |
| XFS_CHECK_SB_OFFSET(sb_versionnum, 100); |
| XFS_CHECK_SB_OFFSET(sb_sectsize, 102); |
| XFS_CHECK_SB_OFFSET(sb_inodesize, 104); |
| XFS_CHECK_SB_OFFSET(sb_inopblock, 106); |
| XFS_CHECK_SB_OFFSET(sb_blocklog, 120); |
| XFS_CHECK_SB_OFFSET(sb_fname[12], 120); |
| XFS_CHECK_SB_OFFSET(sb_sectlog, 121); |
| XFS_CHECK_SB_OFFSET(sb_inodelog, 122); |
| XFS_CHECK_SB_OFFSET(sb_inopblog, 123); |
| XFS_CHECK_SB_OFFSET(sb_agblklog, 124); |
| XFS_CHECK_SB_OFFSET(sb_rextslog, 125); |
| XFS_CHECK_SB_OFFSET(sb_inprogress, 126); |
| XFS_CHECK_SB_OFFSET(sb_imax_pct, 127); |
| XFS_CHECK_SB_OFFSET(sb_icount, 128); |
| XFS_CHECK_SB_OFFSET(sb_ifree, 136); |
| XFS_CHECK_SB_OFFSET(sb_fdblocks, 144); |
| XFS_CHECK_SB_OFFSET(sb_frextents, 152); |
| XFS_CHECK_SB_OFFSET(sb_uquotino, 160); |
| XFS_CHECK_SB_OFFSET(sb_gquotino, 168); |
| XFS_CHECK_SB_OFFSET(sb_qflags, 176); |
| XFS_CHECK_SB_OFFSET(sb_flags, 178); |
| XFS_CHECK_SB_OFFSET(sb_shared_vn, 179); |
| XFS_CHECK_SB_OFFSET(sb_inoalignmt, 180); |
| XFS_CHECK_SB_OFFSET(sb_unit, 184); |
| XFS_CHECK_SB_OFFSET(sb_width, 188); |
| XFS_CHECK_SB_OFFSET(sb_dirblklog, 192); |
| XFS_CHECK_SB_OFFSET(sb_logsectlog, 193); |
| XFS_CHECK_SB_OFFSET(sb_logsectsize, 194); |
| XFS_CHECK_SB_OFFSET(sb_logsunit, 196); |
| XFS_CHECK_SB_OFFSET(sb_features2, 200); |
| XFS_CHECK_SB_OFFSET(sb_bad_features2, 204); |
| XFS_CHECK_SB_OFFSET(sb_features_compat, 208); |
| XFS_CHECK_SB_OFFSET(sb_features_ro_compat, 212); |
| XFS_CHECK_SB_OFFSET(sb_features_incompat, 216); |
| XFS_CHECK_SB_OFFSET(sb_features_log_incompat, 220); |
| XFS_CHECK_SB_OFFSET(sb_crc, 224); |
| XFS_CHECK_SB_OFFSET(sb_spino_align, 228); |
| XFS_CHECK_SB_OFFSET(sb_pquotino, 232); |
| XFS_CHECK_SB_OFFSET(sb_lsn, 240); |
| XFS_CHECK_SB_OFFSET(sb_meta_uuid, 248); |
| XFS_CHECK_SB_OFFSET(sb_metadirino, 264); |
| XFS_CHECK_SB_OFFSET(sb_rgcount, 272); |
| XFS_CHECK_SB_OFFSET(sb_rgextents, 276); |
| XFS_CHECK_SB_OFFSET(sb_rgblklog, 280); |
| XFS_CHECK_SB_OFFSET(sb_pad, 281); |
| } |
| |
| #endif /* __XFS_ONDISK_H */ |
