[Ocfs2-test-devel] [PATCH 6/8] defrag-test: Add a utility to defrag the file as requsted.

[Tristan Ye]

using new ioctl OCFS2_IOC_MOVE_EXT to defrag the single file on purpose.

Signed-off-by: Tristan Ye <tristan.ye at oracle.com>
---
 programs/defrag-test/Makefile   |    7 ++-
 programs/defrag-test/defrager.c |  128 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+), 2 deletions(-)
 create mode 100644 programs/defrag-test/defrager.c

diff --git a/programs/defrag-test/Makefile b/programs/defrag-test/Makefile
index 3140562..08af47e 100644
--- a/programs/defrag-test/Makefile
+++ b/programs/defrag-test/Makefile
@@ -14,11 +14,11 @@ CFLAGS += $(INCLUDES)
 
 LIBO2TEST = $(TOPDIR)/programs/libocfs2test/libocfs2test.a
 
-SOURCES = frager.c verify_file.c
+SOURCES = frager.c verify_file.c defrager.c
 
 DIST_FILES = $(SOURCES)
 
-BIN_PROGRAMS = frager verify_file
+BIN_PROGRAMS = frager verify_file defrager
 
 frager: frager.o
 	$(LINK) $(OCFS2_LIBS) $(LIBO2TEST)
@@ -26,4 +26,7 @@ frager: frager.o
 verify_file: verify_file.o
 	$(LINK) $(OCFS2_LIBS) $(LIBO2TEST)
 
+defrager: defrager.o
+	$(LINK) $(OCFS2_LIBS)
+
 include $(TOPDIR)/Postamble.make
diff --git a/programs/defrag-test/defrager.c b/programs/defrag-test/defrager.c
new file mode 100644
index 0000000..27a8530
--- /dev/null
+++ b/programs/defrag-test/defrager.c
@@ -0,0 +1,128 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * defrager.c
+ *
+ * simple utility to defrag or move extents for a file.
+ *
+ * Copyright (C) 2011 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License, version 2,  as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#define _XOPEN_SOURCE 600 /* Triggers magic in features.h */
+#define _LARGEFILE64_SOURCE
+
+#include <stdio.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <ctype.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <ocfs2/bitops.h>
+#include <libgen.h>
+#include <sys/vfs.h>
+#include <sys/ioctl.h>
+
+#include "ocfs2/ocfs2.h"
+#include "ocfs2/image.h"
+#include "ocfs2-kernel/ocfs2_ioctl.h"
+
+char *program_name = NULL;
+char *filename = NULL;
+
+static void usage(void)
+{
+	fprintf(stderr, ("Usage: %s [-s start_offset] [-l length] [-t thresh] "
+		"<file_path>\n"),
+		program_name);
+	exit(1);
+}
+
+int parse_opts(int argc, char **argv, struct ocfs2_move_extents *range)
+{
+	char c;
+
+	program_name = argv[0];
+	optind = 0;
+
+	while((c = getopt(argc, argv, "s:l:ht:")) != EOF) {
+		switch (c) {
+		case 's':
+			range->me_start = atol(optarg);
+			break;
+		case 'l':
+			range->me_len = atol(optarg);
+			break;
+		case 't':
+			range->me_thresh = atol(optarg);
+			break;
+		case 'h':
+			usage();
+			break;
+		default:
+			return -1;
+		}
+	}
+
+	if (optind >= argc) {
+		fprintf(stderr, "No file specified\n");
+		usage();
+	}
+
+	filename = argv[optind];
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	
+	int ret, fd;
+	struct ocfs2_move_extents range;
+
+	memset(&range, 0, sizeof(range));
+
+	ret = parse_opts(argc, argv, &range);
+	if (ret)
+		return ret;
+
+	range.me_flags |= OCFS2_MOVE_EXT_FL_AUTO_DEFRAG;
+
+	fd = open(filename, O_RDWR);
+	if (fd < 0) {
+		ret = errno;
+		fprintf(stderr, "open file %s failed %d %s\n", filename,
+			ret, strerror(ret));
+		goto out;
+	}
+
+	ret = ioctl(fd, OCFS2_IOC_MOVE_EXT, &range);
+	if (ret < 0) {
+		ret = errno;
+		fprintf(stderr, "ioctl failed %d %s\n", ret, strerror(ret));
+		goto out;
+	}
+
+	if (!(range.me_flags & OCFS2_MOVE_EXT_FL_COMPLETE))
+		fprintf(stderr, "defrag didn't get finished completely.\n");
+out:
+	return ret;
+}
-- 
1.6.5.2