btrfs-progs: move transaction implementation out of header

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/transaction.c b/transaction.c
new file mode 100644
index 00000000..b9280015
--- /dev/null
+++ b/transaction.c
@@ -0,0 +1,49 @@
+/*
+ * 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 "transaction.h"
+
+#include "messages.h"
+
+struct btrfs_trans_handle* btrfs_start_transaction(struct btrfs_root *root,
+		int num_blocks)
+{
+	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_trans_handle *h = kzalloc(sizeof(*h), GFP_NOFS);
+
+	if (!h)
+		return ERR_PTR(-ENOMEM);
+	if (root->commit_root) {
+		error("commit_root aleady set when starting transaction");
+		kfree(h);
+		return ERR_PTR(-EINVAL);
+	}
+	if (fs_info->running_transaction) {
+		error("attempt to start transaction over already running one");
+		kfree(h);
+		return ERR_PTR(-EINVAL);
+	}
+	fs_info->running_transaction = h;
+	fs_info->generation++;
+	h->transid = fs_info->generation;
+	h->blocks_reserved = num_blocks;
+	root->last_trans = h->transid;
+	root->commit_root = root->node;
+	extent_buffer_get(root->node);
+
+	return h;
+}