2 * This testing program makes sure the ext2_inode structure is 1024 bytes long
4 * Copyright (C) 2007 by Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
19 struct ext2_inode inode;
23 #define offsetof(type, member) __builtin_offsetof (type, member)
24 #define check_field(x) cur_offset = do_field(#x, sizeof(inode.x), \
25 offsetof(struct ext2_inode, x), \
28 static int do_field(const char *field, size_t size, int offset, int cur_offset)
30 if (offset != cur_offset) {
31 printf("Warning! Unexpected offset at %s\n", field);
34 printf("%8d %-30s %3u\n", offset, field, (unsigned) size);
38 void check_structure_fields()
43 printf("%8s %-30s %3s\n", "offset", "field", "size");
52 check_field(i_links_count);
53 check_field(i_blocks);
55 check_field(osd1.linux1.l_i_version);
57 check_field(i_generation);
58 check_field(i_file_acl);
59 check_field(i_size_high);
61 check_field(osd2.linux2.l_i_blocks_hi);
62 check_field(osd2.linux2.l_i_file_acl_high);
63 check_field(osd2.linux2.l_i_uid_high);
64 check_field(osd2.linux2.l_i_gid_high);
65 check_field(osd2.linux2.l_i_checksum_lo);
66 check_field(osd2.linux2.l_i_reserved);
67 printf("Ending offset is %d\n\n", cur_offset);
72 int main(int argc, char **argv)
74 int l = sizeof(struct ext2_inode);
76 check_structure_fields();
77 printf("Size of struct ext2_inode is %d\n", l);