| // 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) |
| |
| static inline void __init |
| xfs_check_ondisk_structs(void) |
| { |
| /* ag/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_agf, 224); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344); |
| 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_btree_block_shdr, 48); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72); |
| 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_dsb, 264); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56); |
| 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_timestamp_t, 8); |
| XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8); |
| XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8); |
| XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8); |
| 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); |
| |
| /* 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(xfs_attr_leaf_entry_t, 8); |
| XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32); |
| XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4); |
| |
| /* realtime structures */ |
| XFS_CHECK_STRUCT_SIZE(union xfs_rtword_raw, 4); |
| XFS_CHECK_STRUCT_SIZE(union xfs_suminfo_raw, 4); |
| |
| /* |
| * m68k has problems with xfs_attr_leaf_name_remote_t, 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(xfs_attr_leaf_name_remote_t, 12); |
| */ |
| |
| XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0); |
| XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2); |
| XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3); |
| XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0); |
| XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4); |
| XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8); |
| XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9); |
| XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 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(xfs_da_blkinfo_t, 12); |
| XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16); |
| XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8); |
| XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16); |
| XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0); |
| XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3); |
| XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0); |
| XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1); |
| XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3); |
| XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 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); |
| |
| /* |
| * 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); |
| } |
| |
| #endif /* __XFS_ONDISK_H */ |
