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      1 /*
      2  * This testing program makes sure the ext2_inode structure is 1024 bytes long
      3  *
      4  * Copyright (C) 2007 by Theodore Ts'o.
      5  *
      6  * %Begin-Header%
      7  * This file may be redistributed under the terms of the GNU Library
      8  * General Public License, version 2.
      9  * %End-Header%
     10  */
     11 
     12 #include <stdio.h>
     13 #include <unistd.h>
     14 #include <stdlib.h>
     15 
     16 #include "ext2_fs.h"
     17 
     18 struct ext2_inode_large inode;
     19 
     20 #ifndef offsetof
     21 #define offsetof(type, member)  __builtin_offsetof(type, member)
     22 #endif
     23 
     24 #define check_field(x, s) cur_offset = do_field(#x, s, sizeof(inode.x),	       \
     25 					offsetof(struct ext2_inode_large, x),  \
     26 					cur_offset)
     27 
     28 static int do_field(const char *field, unsigned size, unsigned cur_size,
     29 		    unsigned offset, unsigned cur_offset)
     30 {
     31 	if (size != cur_size) {
     32 		printf("error: %s size %u should be %u\n",
     33 		       field, cur_size, size);
     34 		exit(1);
     35 	}
     36 	if (offset != cur_offset) {
     37 		printf("error: %s offset %u should be %u\n",
     38 		       field, cur_offset, offset);
     39 		exit(1);
     40 	}
     41 	printf("%8d %-30s %3u\n", offset, field, (unsigned) size);
     42 	return offset + size;
     43 }
     44 
     45 int main(int argc, char **argv)
     46 {
     47 #if (__GNUC__ >= 4)
     48 	int cur_offset = 0;
     49 
     50 	printf("%8s %-30s %3s\n", "offset", "field", "size");
     51 	check_field(i_mode, 2);
     52 	check_field(i_uid, 2);
     53 	check_field(i_size, 4);
     54 	check_field(i_atime, 4);
     55 	check_field(i_ctime, 4);
     56 	check_field(i_mtime, 4);
     57 	check_field(i_dtime, 4);
     58 	check_field(i_gid, 2);
     59 	check_field(i_links_count, 2);
     60 	check_field(i_blocks, 4);
     61 	check_field(i_flags, 4);
     62 	check_field(osd1.linux1.l_i_version, 4);
     63 	check_field(i_block, 15 * 4);
     64 	check_field(i_generation, 4);
     65 	check_field(i_file_acl, 4);
     66 	check_field(i_size_high, 4);
     67 	check_field(i_faddr, 4);
     68 	check_field(osd2.linux2.l_i_blocks_hi, 2);
     69 	check_field(osd2.linux2.l_i_file_acl_high, 2);
     70 	check_field(osd2.linux2.l_i_uid_high, 2);
     71 	check_field(osd2.linux2.l_i_gid_high, 2);
     72 	check_field(osd2.linux2.l_i_checksum_lo, 2);
     73 	check_field(osd2.linux2.l_i_reserved, 2);
     74 	do_field("Small inode end", 0, 0, cur_offset, 128);
     75 	check_field(i_extra_isize, 2);
     76 	check_field(i_checksum_hi, 2);
     77 	check_field(i_ctime_extra, 4);
     78 	check_field(i_mtime_extra, 4);
     79 	check_field(i_atime_extra, 4);
     80 	check_field(i_crtime, 4);
     81 	check_field(i_crtime_extra, 4);
     82 	check_field(i_version_hi, 4);
     83 	/* This size will change as new fields are added */
     84 	do_field("Large inode end", 0, 0, cur_offset, sizeof(inode));
     85 #endif
     86 	return 0;
     87 }
     88