1 files changed, 80 insertions, 0 deletions
diff --git a/lib/ext2fs/tst_inode_size.c b/lib/ext2fs/tst_inode_size.c
new file mode 100644
index 00000000..962f1cd3
--- /dev/null
+++ b/lib/ext2fs/tst_inode_size.c
@@ -0,0 +1,80 @@
+/*
+ * This testing program makes sure the ext2_inode structure is 1024 bytes long
+ *
+ * Copyright (C) 2007 by Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "ext2_fs.h"
+
+struct ext2_inode inode;
+
+int verbose = 0;
+
+#define offsetof(type, member)  __builtin_offsetof (type, member)
+#define check_field(x) cur_offset = do_field(#x, sizeof(inode.x),	\
+				offsetof(struct ext2_inode, x), \
+				cur_offset)
+
+static int do_field(const char *field, size_t size, int offset, int cur_offset)
+{
+	if (offset != cur_offset) {
+		printf("Warning!  Unexpected offset at %s\n", field);
+		exit(1);
+	}
+	printf("%8d %-30s %3u\n", offset, field, (unsigned) size);
+	return offset + size;
+}
+
+void check_structure_fields()
+{
+#if (__GNUC__ >= 4)
+	int cur_offset = 0;
+
+	printf("%8s %-30s %3s\n", "offset", "field", "size");
+	check_field(i_mode);
+	check_field(i_uid);
+	check_field(i_size);
+	check_field(i_atime);
+	check_field(i_ctime);
+	check_field(i_mtime);
+	check_field(i_dtime);
+	check_field(i_gid);
+	check_field(i_links_count);
+	check_field(i_blocks);
+	check_field(i_flags);
+	check_field(osd1.linux1.l_i_version);
+	check_field(i_block);
+	check_field(i_generation);
+	check_field(i_file_acl);
+	check_field(i_size_high);
+	check_field(i_faddr);
+	check_field(osd2.linux2.l_i_blocks_hi);
+	check_field(osd2.linux2.l_i_file_acl_high);
+	check_field(osd2.linux2.l_i_uid_high);
+	check_field(osd2.linux2.l_i_gid_high);
+	check_field(osd2.linux2.l_i_reserved2);
+	printf("Ending offset is %d\n\n", cur_offset);
+#endif
+}
+
+
+int main(int argc, char **argv)
+{
+	int l = sizeof(struct ext2_inode);
+
+	check_structure_fields();
+	printf("Size of struct ext2_inode is %d\n", l);
+	if (l != 256) {
+		exit(1);
+	}
+	exit(0);
+}