1 files changed, 89 insertions, 0 deletions
diff --git a/lib/ext2fs/tst_inode_size.c b/lib/ext2fs/tst_inode_size.c
new file mode 100644
index 0000000..cc5d165
--- /dev/null
+++ b/lib/ext2fs/tst_inode_size.c
@@ -0,0 +1,89 @@
+/*
+ * 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 "config.h"
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "ext2_fs.h"
+
+struct ext2_inode_large inode;
+
+#ifndef offsetof
+#define offsetof(type, member)  __builtin_offsetof(type, member)
+#endif
+
+#define check_field(x, s) cur_offset = do_field(#x, s, sizeof(inode.x),	       \
+					offsetof(struct ext2_inode_large, x),  \
+					cur_offset)
+
+static int do_field(const char *field, unsigned size, unsigned cur_size,
+		    unsigned offset, unsigned cur_offset)
+{
+	if (size != cur_size) {
+		printf("error: %s size %u should be %u\n",
+		       field, cur_size, size);
+		exit(1);
+	}
+	if (offset != cur_offset) {
+		printf("error: %s offset %u should be %u\n",
+		       field, cur_offset, offset);
+		exit(1);
+	}
+	printf("%8d %-30s %3u\n", offset, field, (unsigned) size);
+	return offset + size;
+}
+
+int main(int argc, char **argv)
+{
+#if (__GNUC__ >= 4)
+	int cur_offset = 0;
+
+	printf("%8s %-30s %3s\n", "offset", "field", "size");
+	check_field(i_mode, 2);
+	check_field(i_uid, 2);
+	check_field(i_size, 4);
+	check_field(i_atime, 4);
+	check_field(i_ctime, 4);
+	check_field(i_mtime, 4);
+	check_field(i_dtime, 4);
+	check_field(i_gid, 2);
+	check_field(i_links_count, 2);
+	check_field(i_blocks, 4);
+	check_field(i_flags, 4);
+	check_field(osd1.linux1.l_i_version, 4);
+	check_field(i_block, 15 * 4);
+	check_field(i_generation, 4);
+	check_field(i_file_acl, 4);
+	check_field(i_size_high, 4);
+	check_field(i_faddr, 4);
+	check_field(osd2.linux2.l_i_blocks_hi, 2);
+	check_field(osd2.linux2.l_i_file_acl_high, 2);
+	check_field(osd2.linux2.l_i_uid_high, 2);
+	check_field(osd2.linux2.l_i_gid_high, 2);
+	check_field(osd2.linux2.l_i_checksum_lo, 2);
+	check_field(osd2.linux2.l_i_reserved, 2);
+	do_field("Small inode end", 0, 0, cur_offset, 128);
+	check_field(i_extra_isize, 2);
+	check_field(i_checksum_hi, 2);
+	check_field(i_ctime_extra, 4);
+	check_field(i_mtime_extra, 4);
+	check_field(i_atime_extra, 4);
+	check_field(i_crtime, 4);
+	check_field(i_crtime_extra, 4);
+	check_field(i_version_hi, 4);
+	check_field(i_projid, 4);
+	/* This size will change as new fields are added */
+	do_field("Large inode end", 0, 0, cur_offset, sizeof(inode));
+#endif
+	return 0;
+}