2023-08-30 17:31:07 +02:00
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016 Oracle.
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* All Rights Reserved.
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*/
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#ifndef __XFS_ONDISK_H
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#define __XFS_ONDISK_H
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#define XFS_CHECK_STRUCT_SIZE(structname, size) \
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BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \
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#structname ") is wrong, expected " #size)
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#define XFS_CHECK_OFFSET(structname, member, off) \
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BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \
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"XFS: offsetof(" #structname ", " #member ") is wrong, " \
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"expected " #off)
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#define XFS_CHECK_VALUE(value, expected) \
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BUILD_BUG_ON_MSG((value) != (expected), \
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"XFS: value of " #value " is wrong, expected " #expected)
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static inline void __init
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xfs_check_ondisk_structs(void)
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{
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/* ag/file structures */
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XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
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XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
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XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
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XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
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XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);
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XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
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XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
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XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
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XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
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XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
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XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
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XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
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XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
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XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
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XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
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XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);
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XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8);
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XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
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XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
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XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
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XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
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XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
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XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
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/* dir/attr trees */
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XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
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2023-10-24 12:59:35 +02:00
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XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80);
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2023-08-30 17:31:07 +02:00
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XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
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XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
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XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
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XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
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XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
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XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
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XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
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/*
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* m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
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* 4 bytes anyway so it's not obviously a problem. Hence for the moment
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* we don't check this structure. This can be re-instated when the attr
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* definitions are updated to use c99 VLA definitions.
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*
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XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
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*/
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XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
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XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
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XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
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XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
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XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
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XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
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XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
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2023-10-24 12:59:35 +02:00
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XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 32);
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XFS_CHECK_STRUCT_SIZE(struct xfs_attr_shortform, 4);
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2023-08-30 17:31:07 +02:00
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XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0);
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XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count, 2);
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XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen, 4);
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XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen, 5);
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XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags, 6);
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XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval, 7);
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XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
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XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
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XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
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XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
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XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
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XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
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XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
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XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
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XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
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XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
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/* log structures */
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XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
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XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
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XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
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XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
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XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
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XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8);
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XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8);
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XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
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XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
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XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
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XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40);
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XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16);
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XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32);
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XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16);
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XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16);
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XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16);
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XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16);
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XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16);
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XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16);
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XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16);
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/*
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* The v5 superblock format extended several v4 header structures with
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* additional data. While new fields are only accessible on v5
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* superblocks, it's important that the v5 structures place original v4
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* fields/headers in the correct location on-disk. For example, we must
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* be able to find magic values at the same location in certain blocks
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* regardless of superblock version.
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*
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* The following checks ensure that various v5 data structures place the
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* subset of v4 metadata associated with the same type of block at the
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* start of the on-disk block. If there is no data structure definition
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* for certain types of v4 blocks, traverse down to the first field of
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* common metadata (e.g., magic value) and make sure it is at offset
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* zero.
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*/
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XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
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XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
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XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
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XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
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XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
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XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
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XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
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XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
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XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
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/*
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* Make sure the incore inode timestamp range corresponds to hand
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* converted values based on the ondisk format specification.
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*/
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XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
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XFS_LEGACY_TIME_MIN);
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XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
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16299260424LL);
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/* Do the same with the incore quota expiration range. */
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XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);
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XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,
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16299260424LL);
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}
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#endif /* __XFS_ONDISK_H */
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