diff --git a/Makefile b/Makefile
index 3874a2c0..c4a8f938 100644
--- a/Makefile
+++ b/Makefile
@@ -234,7 +234,7 @@ convert_objects = convert/main.o convert/common.o convert/source-fs.o \
 		  mkfs/common.o
 mkfs_objects = mkfs/main.o mkfs/common.o mkfs/rootdir.o
 image_objects = image/main.o image/sanitize.o
-tune_objects = tune/main.o
+tune_objects = tune/main.o tune/seeding.o
 all_objects = $(objects) $(cmds_objects) $(libbtrfs_objects) $(convert_objects) \
 	      $(mkfs_objects) $(image_objects) $(tune_objects) $(libbtrfsutil_objects)
 
diff --git a/tune/main.c b/tune/main.c
index afa4cc97..dc0f67d1 100644
--- a/tune/main.c
+++ b/tune/main.c
@@ -41,51 +41,12 @@
 #include "common/string-utils.h"
 #include "common/help.h"
 #include "common/box.h"
+#include "tune/tune.h"
 #include "ioctl.h"
 
 static char *device;
 static int force = 0;
 
-static int update_seeding_flag(struct btrfs_root *root, int set_flag)
-{
-	struct btrfs_trans_handle *trans;
-	struct btrfs_super_block *disk_super;
-	u64 super_flags;
-	int ret;
-
-	disk_super = root->fs_info->super_copy;
-	super_flags = btrfs_super_flags(disk_super);
-	if (set_flag) {
-		if (super_flags & BTRFS_SUPER_FLAG_SEEDING) {
-			if (force)
-				return 0;
-			else
-				warning("seeding flag is already set on %s",
-						device);
-			return 1;
-		}
-		if (btrfs_super_log_root(disk_super)) {
-			error("filesystem with dirty log detected, not setting seed flag");
-			return 1;
-		}
-		super_flags |= BTRFS_SUPER_FLAG_SEEDING;
-	} else {
-		if (!(super_flags & BTRFS_SUPER_FLAG_SEEDING)) {
-			warning("seeding flag is not set on %s", device);
-			return 1;
-		}
-		super_flags &= ~BTRFS_SUPER_FLAG_SEEDING;
-		warning("seeding flag cleared on %s", device);
-	}
-
-	trans = btrfs_start_transaction(root, 1);
-	BUG_ON(IS_ERR(trans));
-	btrfs_set_super_flags(disk_super, super_flags);
-	ret = btrfs_commit_transaction(trans, root);
-
-	return ret;
-}
-
 /*
  * Return 0 for no unfinished fsid change.
  * Return >0 for unfinished fsid change, and restore unfinished fsid/
@@ -1111,7 +1072,7 @@ int BOX_MAIN(btrfstune)(int argc, char *argv[])
 			}
 		}
 
-		ret = update_seeding_flag(root, seeding_value);
+		ret = update_seeding_flag(root, device, seeding_value, force);
 		if (!ret)
 			success++;
 		total++;
diff --git a/tune/seeding.c b/tune/seeding.c
new file mode 100644
index 00000000..80b075e5
--- /dev/null
+++ b/tune/seeding.c
@@ -0,0 +1,61 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 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.
+ */
+
+#include "kerncompat.h"
+#include "kernel-shared/ctree.h"
+#include "kernel-shared/transaction.h"
+#include "common/messages.h"
+
+int update_seeding_flag(struct btrfs_root *root, const char *device, int set_flag, int force)
+{
+	struct btrfs_trans_handle *trans;
+	struct btrfs_super_block *disk_super;
+	u64 super_flags;
+	int ret;
+
+	disk_super = root->fs_info->super_copy;
+	super_flags = btrfs_super_flags(disk_super);
+	if (set_flag) {
+		if (super_flags & BTRFS_SUPER_FLAG_SEEDING) {
+			if (force)
+				return 0;
+			else
+				warning("seeding flag is already set on %s",
+						device);
+			return 1;
+		}
+		if (btrfs_super_log_root(disk_super)) {
+			error("filesystem with dirty log detected, not setting seed flag");
+			return 1;
+		}
+		super_flags |= BTRFS_SUPER_FLAG_SEEDING;
+	} else {
+		if (!(super_flags & BTRFS_SUPER_FLAG_SEEDING)) {
+			warning("seeding flag is not set on %s", device);
+			return 1;
+		}
+		super_flags &= ~BTRFS_SUPER_FLAG_SEEDING;
+		warning("seeding flag cleared on %s", device);
+	}
+
+	trans = btrfs_start_transaction(root, 1);
+	BUG_ON(IS_ERR(trans));
+	btrfs_set_super_flags(disk_super, super_flags);
+	ret = btrfs_commit_transaction(trans, root);
+
+	return ret;
+}
+
diff --git a/tune/tune.h b/tune/tune.h
new file mode 100644
index 00000000..7cc8b7f1
--- /dev/null
+++ b/tune/tune.h
@@ -0,0 +1,24 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 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.
+ */
+
+#ifndef __BTRFS_TUNE_H__
+#define __BTRFS_TUNE_H__
+
+struct btrfs_root;
+
+int update_seeding_flag(struct btrfs_root *root, const char *device, int set_flag, int force);
+
+#endif