add open release, refactor

weed/mount/weedfs_file_write.go

@@ -0,0 +1,35 @@
+package mount
+
+import (
+	"github.com/hanwen/go-fuse/v2/fuse"
+)
+
+/**
+ * Write data
+ *
+ * Write should return exactly the number of bytes requested
+ * except on error.  An exception to this is when the file has
+ * been opened in 'direct_io' mode, in which case the return value
+ * of the write system call will reflect the return value of this
+ * operation.
+ *
+ * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+ * expected to reset the setuid and setgid bits.
+ *
+ * fi->fh will contain the value set by the open method, or will
+ * be undefined if the open method didn't set any value.
+ *
+ * Valid replies:
+ *   fuse_reply_write
+ *   fuse_reply_err
+ *
+ * @param req request handle
+ * @param ino the inode number
+ * @param buf data to write
+ * @param size number of bytes to write
+ * @param off offset to write to
+ * @param fi file information
+ */
+func (wfs *WFS) Write(cancel <-chan struct{}, in *fuse.WriteIn, data []byte) (written uint32, code fuse.Status) {
+	return 0, fuse.ENOSYS
+}