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-rw-r--r--src/librbd/image/CloseRequest.h126
1 files changed, 126 insertions, 0 deletions
diff --git a/src/librbd/image/CloseRequest.h b/src/librbd/image/CloseRequest.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IMAGE_CLOSE_REQUEST_H
+#define CEPH_LIBRBD_IMAGE_CLOSE_REQUEST_H
+
+#include "librbd/ImageCtx.h"
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace image {
+
+template <typename ImageCtxT = ImageCtx>
+class CloseRequest {
+public:
+ static CloseRequest *create(ImageCtxT *image_ctx, Context *on_finish) {
+ return new CloseRequest(image_ctx, on_finish);
+ }
+
+ void send();
+
+private:
+ /**
+ * @verbatim
+ *
+ * <start>
+ * |
+ * v
+ * BLOCK_IMAGE_WATCHER (skip if R/O)
+ * |
+ * v
+ * SHUT_DOWN_UPDATE_WATCHERS
+ * |
+ * v
+ * SHUT_DOWN_AIO_WORK_QUEUE . . .
+ * | . (exclusive lock disabled)
+ * v v
+ * SHUT_DOWN_EXCLUSIVE_LOCK FLUSH
+ * | .
+ * | . . . . . . . . . . .
+ * | .
+ * v v
+ * UNREGISTER_IMAGE_WATCHER (skip if R/O)
+ * |
+ * v
+ * FLUSH_READAHEAD
+ * |
+ * v
+ * SHUT_DOWN_OBJECT_DISPATCHER
+ * |
+ * v
+ * FLUSH_OP_WORK_QUEUE
+ * |
+ * v (skip if no parent)
+ * CLOSE_PARENT
+ * |
+ * v
+ * FLUSH_IMAGE_WATCHER
+ * |
+ * v
+ * <finish>
+ *
+ * @endverbatim
+ */
+
+ CloseRequest(ImageCtxT *image_ctx, Context *on_finish);
+
+ ImageCtxT *m_image_ctx;
+ Context *m_on_finish;
+
+ int m_error_result;
+
+ decltype(m_image_ctx->exclusive_lock) m_exclusive_lock;
+
+ void send_block_image_watcher();
+ void handle_block_image_watcher(int r);
+
+ void send_shut_down_update_watchers();
+ void handle_shut_down_update_watchers(int r);
+
+ void send_shut_down_io_queue();
+ void handle_shut_down_io_queue(int r);
+
+ void send_shut_down_exclusive_lock();
+ void handle_shut_down_exclusive_lock(int r);
+
+ void send_flush();
+ void handle_flush(int r);
+
+ void send_unregister_image_watcher();
+ void handle_unregister_image_watcher(int r);
+
+ void send_flush_readahead();
+ void handle_flush_readahead(int r);
+
+ void send_shut_down_object_dispatcher();
+ void handle_shut_down_object_dispatcher(int r);
+
+ void send_flush_op_work_queue();
+ void handle_flush_op_work_queue(int r);
+
+ void send_close_parent();
+ void handle_close_parent(int r);
+
+ void send_flush_image_watcher();
+ void handle_flush_image_watcher(int r);
+
+ void finish();
+
+ void save_result(int result) {
+ if (m_error_result == 0 && result < 0) {
+ m_error_result = result;
+ }
+ }
+};
+
+} // namespace image
+} // namespace librbd
+
+extern template class librbd::image::CloseRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_IMAGE_CLOSE_REQUEST_H