[linux.git] / fs / xfs / xfs_ondisk.h

// 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) \
	BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \
		#structname ") is wrong, expected " #size)

#define XFS_CHECK_OFFSET(structname, member, off) \
	BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \
		"XFS: offsetof(" #structname ", " #member ") is wrong, " \
		"expected " #off)

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,			336);
	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(struct xfs_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,	88);
	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);

	/*
	 * 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,		40);
	XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.totsize,	0);
	XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.count,	2);
	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].namelen,	4);
	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].valuelen, 5);
	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].flags,	6);
	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].nameval,	7);
	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_dq_logformat,		24);
	XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32,	28);
	XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64,	32);
	XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32,	28);
	XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64,	32);
	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(struct xfs_ictimestamp,		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);
}

#endif /* __XFS_ONDISK_H */
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
30cbc591 DW	2	/*
	3	* Copyright (c) 2016 Oracle.
	4	* All Rights Reserved.
30cbc591 DW	5	*/
	6	#ifndef __XFS_ONDISK_H
	7	#define __XFS_ONDISK_H
	8
	9	#define XFS_CHECK_STRUCT_SIZE(structname, size) \
	10	BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \
	11	#structname ") is wrong, expected " #size)
	12
3f94c441 DW	13	#define XFS_CHECK_OFFSET(structname, member, off) \
	14	BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \
	15	"XFS: offsetof(" #structname ", " #member ") is wrong, " \
	16	"expected " #off)
	17
30cbc591 DW	18	static inline void __init
	19	xfs_check_ondisk_structs(void)
	20	{
	21	/* ag/file structures */
	22	XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
	23	XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
	24	XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
	25	XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
	26	XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 336);
	27	XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
	28	XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
	29	XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
ad70328a HT	30	XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
ad70328a HT	31	XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
30cbc591 DW	32	XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
	33	XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
	34	XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
	35	XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
	36	XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
	37	XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
	38	XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
	39	XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
1946b91c DW	40	XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
1946b91c DW	41	XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
035e00ac DW	42	XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
035e00ac DW	43	XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
30cbc591 DW	44	XFS_CHECK_STRUCT_SIZE(struct xfs_timestamp, 8);
	45	XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
	46	XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
	47	XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
	48	XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
1946b91c	49	XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
035e00ac	50	XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
30cbc591 DW	51
	52	/* dir/attr trees */
	53	XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
	54	XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 88);
	55	XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
	56	XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
	57	XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
	58	XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
	59	XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
	60	XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
	61	XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
	62	XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
	63	XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
	64	XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
	65	XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
	66	XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
	67	XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
	68	XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
	69
	70	/*
	71	* m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
	72	* 4 bytes anyway so it's not obviously a problem. Hence for the moment
	73	* we don't check this structure. This can be re-instated when the attr
	74	* definitions are updated to use c99 VLA definitions.
	75	*
	76	XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
	77	*/
	78
3f94c441 DW	79	XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
	80	XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
	81	XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
	82	XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
	83	XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
	84	XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
	85	XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
30cbc591	86	XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 40);
3f94c441 DW	87	XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.totsize, 0);
	88	XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.count, 2);
	89	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].namelen, 4);
	90	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].valuelen, 5);
	91	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].flags, 6);
	92	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].nameval, 7);
30cbc591 DW	93	XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
	94	XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
	95	XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
	96	XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
	97	XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
	98	XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
3f94c441 DW	99	XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
3f94c441 DW	100	XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
30cbc591 DW	101	XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
30cbc591 DW	102	XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
30cbc591 DW	103	XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
	104	XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
	105	XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
	106	XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
	107	XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
3f94c441 DW	108	XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
	109	XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
	110	XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
30cbc591	111	XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
30cbc591 DW	112
	113	/* log structures */
	114	XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
	115	XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 28);
	116	XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 32);
	117	XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 28);
	118	XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 32);
	119	XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
	120	XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
	121	XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
	122	XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
	123	XFS_CHECK_STRUCT_SIZE(struct xfs_ictimestamp, 8);
	124	XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
20413e37	125	XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
30cbc591 DW	126	XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
	127	XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
	128	}
	129
	130	#endif /* __XFS_ONDISK_H */