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// 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, 288);
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(struct xfs_alloc_rec, 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);
XFS_CHECK_STRUCT_SIZE(struct xfs_rtsb, 56);
/* 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(union xfs_rtword_raw, 4);
XFS_CHECK_STRUCT_SIZE(union xfs_suminfo_raw, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_rtbuf_blkinfo, 48);
/*
* 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_dsb, sb_crc, 224);
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);
/* 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);
/* 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);
}
#endif /* __XFS_ONDISK_H */
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