1 /* 2 * Copyright (c) 2016 Oracle. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_ONDISK_H 19 #define __XFS_ONDISK_H 20 21 #define XFS_CHECK_STRUCT_SIZE(structname, size) \ 22 BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \ 23 #structname ") is wrong, expected " #size) 24 25 #define XFS_CHECK_OFFSET(structname, member, off) \ 26 BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \ 27 "XFS: offsetof(" #structname ", " #member ") is wrong, " \ 28 "expected " #off) 29 30 static inline void __init 31 xfs_check_ondisk_structs(void) 32 { 33 /* ag/file structures */ 34 XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4); 35 XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12); 36 XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224); 37 XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36); 38 XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 336); 39 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8); 40 XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16); 41 XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4); 42 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48); 43 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64); 44 XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72); 45 XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176); 46 XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104); 47 XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136); 48 XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264); 49 XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56); 50 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4); 51 XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16); 52 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20); 53 XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24); 54 XFS_CHECK_STRUCT_SIZE(struct xfs_timestamp, 8); 55 XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8); 56 XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4); 57 XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8); 58 XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4); 59 XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4); 60 61 /* dir/attr trees */ 62 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80); 63 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 88); 64 XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56); 65 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56); 66 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64); 67 XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64); 68 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48); 69 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64); 70 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64); 71 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64); 72 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64); 73 XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64); 74 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8); 75 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32); 76 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4); 77 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4); 78 79 /* 80 * m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to 81 * 4 bytes anyway so it's not obviously a problem. Hence for the moment 82 * we don't check this structure. This can be re-instated when the attr 83 * definitions are updated to use c99 VLA definitions. 84 * 85 XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12); 86 */ 87 88 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0); 89 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2); 90 XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3); 91 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0); 92 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4); 93 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8); 94 XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9); 95 XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 40); 96 XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.totsize, 0); 97 XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.count, 2); 98 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].namelen, 4); 99 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].valuelen, 5); 100 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].flags, 6); 101 XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].nameval, 7); 102 XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12); 103 XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16); 104 XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8); 105 XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16); 106 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4); 107 XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16); 108 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0); 109 XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2); 110 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16); 111 XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16); 112 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8); 113 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16); 114 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16); 115 XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4); 116 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3); 117 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0); 118 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1); 119 XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3); 120 XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10); 121 122 /* log structures */ 123 XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24); 124 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 28); 125 XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 32); 126 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 28); 127 XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 32); 128 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12); 129 XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16); 130 XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176); 131 XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28); 132 XFS_CHECK_STRUCT_SIZE(struct xfs_ictimestamp, 8); 133 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52); 134 XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_64, 56); 135 XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20); 136 XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16); 137 } 138 139 #endif /* __XFS_ONDISK_H */ 140