Btrfs: transaction handles everywhere

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
new file mode 100644
index 000000000000..3adb6e69fe43
--- /dev/null
+++ b/fs/btrfs/transaction.h
@@ -0,0 +1,27 @@
+#ifndef __TRANSACTION__
+#define __TRANSACTION__
+
+struct btrfs_trans_handle {
+        u64 transid;
+        unsigned long blocks_reserved;
+        unsigned long blocks_used;
+};
+
+static inline struct btrfs_trans_handle *
+btrfs_start_transaction(struct btrfs_root *root, int num_blocks)
+{
+        struct btrfs_trans_handle *h = malloc(sizeof(*h));
+        h->transid = root->root_key.offset;
+        h->blocks_reserved = num_blocks;
+        h->blocks_used = 0;
+        return h;
+}
+
+static inline void btrfs_free_transaction(struct btrfs_root *root,
+                                          struct btrfs_trans_handle *handle)
+{
+        memset(handle, 0, sizeof(*handle));
+        free(handle);
+}
+
+#endif