// 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_unused,      6);

        /* 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_STRUCT_SIZE(struct xlog_rec_header,           512);
        XFS_CHECK_STRUCT_SIZE(struct xlog_rec_ext_header,       512);

        XFS_CHECK_OFFSET(struct xlog_rec_header, h_reserved,            328);
        XFS_CHECK_OFFSET(struct xlog_rec_ext_header, xh_reserved,       260);
        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);

        /*
         * 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,           304);
        XFS_CHECK_STRUCT_SIZE(struct xfs_sb,            304);
        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);
        XFS_CHECK_SB_OFFSET(sb_rtstart,                 288);
        XFS_CHECK_SB_OFFSET(sb_rtreserved,              296);

        /*
         * ioctl UABI
         *
         * Due to different padding/alignment requirements across
         * different architectures, some structures are ommited from
         * the size checks. In addition, structures with architecture
         * dependent size fields are also ommited (e.g. __kernel_long_t).
         */
        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);
        XFS_CHECK_STRUCT_SIZE(struct dioattr,                   12);
        XFS_CHECK_STRUCT_SIZE(struct getbmap,                   32);
        XFS_CHECK_STRUCT_SIZE(struct getbmapx,                  48);
        XFS_CHECK_STRUCT_SIZE(struct xfs_attrlist_cursor,       16);
        XFS_CHECK_STRUCT_SIZE(struct xfs_attrlist,              8);
        XFS_CHECK_STRUCT_SIZE(struct xfs_attrlist,              8);
        XFS_CHECK_STRUCT_SIZE(struct xfs_attrlist_ent,          4);
        XFS_CHECK_STRUCT_SIZE(struct xfs_ag_geometry,           128);
        XFS_CHECK_STRUCT_SIZE(struct xfs_rtgroup_geometry,      128);
        XFS_CHECK_STRUCT_SIZE(struct xfs_error_injection,       8);
        XFS_CHECK_STRUCT_SIZE(struct xfs_fsop_geom,             256);
        XFS_CHECK_STRUCT_SIZE(struct xfs_fsop_geom_v4,          112);
        XFS_CHECK_STRUCT_SIZE(struct xfs_fsop_counts,           32);
        XFS_CHECK_STRUCT_SIZE(struct xfs_fsop_resblks,          16);
        XFS_CHECK_STRUCT_SIZE(struct xfs_growfs_log,            8);
        XFS_CHECK_STRUCT_SIZE(struct xfs_bulk_ireq,             64);
        XFS_CHECK_STRUCT_SIZE(struct xfs_fs_eofblocks,          128);
        XFS_CHECK_STRUCT_SIZE(struct xfs_fsid,                  8);
        XFS_CHECK_STRUCT_SIZE(struct xfs_scrub_metadata,        64);
        XFS_CHECK_STRUCT_SIZE(struct xfs_scrub_vec,             16);
        XFS_CHECK_STRUCT_SIZE(struct xfs_scrub_vec_head,        40);
}

#endif /* __XFS_ONDISK_H */