[ceph.git] / ceph / src / librbd / image / ValidatePoolRequest.h

// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab

#ifndef CEPH_LIBRBD_IMAGE_VALIDATE_POOL_REQUEST_H
#define CEPH_LIBRBD_IMAGE_VALIDATE_POOL_REQUEST_H

#include "include/common_fwd.h"
#include "include/rados/librados.hpp"
#include "include/buffer.h"

class Context;

namespace librbd {

struct ImageCtx;
namespace asio { struct ContextWQ; }

namespace image {

template <typename ImageCtxT>
class ValidatePoolRequest {
public:
  static ValidatePoolRequest* create(librados::IoCtx& io_ctx,
                                     Context *on_finish) {
    return new ValidatePoolRequest(io_ctx, on_finish);
  }

  ValidatePoolRequest(librados::IoCtx& io_ctx, Context *on_finish);

  void send();

private:
  /**
   * @verbatim
   *
   * <start>
   *    |
   *    v           (overwrites validated)
   * READ RBD INFO  . . . . . . . . .
   *    |   .                       .
   *    |   . (snapshots validated) .
   *    |   . . . . . . . . . .     .
   *    v                     .     .
   * CREATE SNAPSHOT          .     .
   *    |                     .     .
   *    v                     .     .
   * WRITE RBD INFO           .     .
   *    |                     .     .
   *    v                     .     .
   * REMOVE SNAPSHOT          .     .
   *    |                     .     .
   *    v                     .     .
   * OVERWRITE RBD INFO < . . .     .
   *    |                           .
   *    v                           .
   * <finish>  < . . . . . .  . . . .`
   *
   * @endverbatim
   */

  librados::IoCtx m_io_ctx;
  CephContext* m_cct;
  Context* m_on_finish;

  int m_ret_val = 0;
  bufferlist m_out_bl;
  uint64_t m_snap_id = 0;

  void read_rbd_info();
  void handle_read_rbd_info(int r);

  void create_snapshot();
  void handle_create_snapshot(int r);

  void write_rbd_info();
  void handle_write_rbd_info(int r);

  void remove_snapshot();
  void handle_remove_snapshot(int r);

  void overwrite_rbd_info();
  void handle_overwrite_rbd_info(int r);

  void finish(int r);

};

} // namespace image
} // namespace librbd

extern template class librbd::image::ValidatePoolRequest<librbd::ImageCtx>;

#endif // CEPH_LIBRBD_IMAGE_VALIDATE_POOL_REQUEST_H
Commit	Line	Data
11fdf7f2 TL	1	// -- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t --
	2	// vim: ts=8 sw=2 smarttab
	3
	4	#ifndef CEPH_LIBRBD_IMAGE_VALIDATE_POOL_REQUEST_H
	5	#define CEPH_LIBRBD_IMAGE_VALIDATE_POOL_REQUEST_H
	6
9f95a23c	7	#include "include/common_fwd.h"
11fdf7f2 TL	8	#include "include/rados/librados.hpp"
	9	#include "include/buffer.h"
	10
11fdf7f2	11	class Context;
11fdf7f2 TL	12
	13	namespace librbd {
	14
	15	struct ImageCtx;
f67539c2	16	namespace asio { struct ContextWQ; }
11fdf7f2 TL	17
	18	namespace image {
	19
	20	template <typename ImageCtxT>
	21	class ValidatePoolRequest {
	22	public:
	23	static ValidatePoolRequest* create(librados::IoCtx& io_ctx,
11fdf7f2	24	Context *on_finish) {
a4b75251	25	return new ValidatePoolRequest(io_ctx, on_finish);
11fdf7f2 TL	26	}
11fdf7f2 TL	27
a4b75251	28	ValidatePoolRequest(librados::IoCtx& io_ctx, Context *on_finish);
11fdf7f2 TL	29
	30	void send();
	31
	32	private:
	33	/**
	34	* @verbatim
	35	*
	36	* <start>
	37	* \|
	38	* v (overwrites validated)
	39	* READ RBD INFO . . . . . . . . .
	40	* \| . .
	41	* \| . (snapshots validated) .
	42	* \| . . . . . . . . . . .
	43	* v . .
	44	* CREATE SNAPSHOT . .
	45	* \| . .
	46	* v . .
	47	* WRITE RBD INFO . .
	48	* \| . .
	49	* v . .
	50	* REMOVE SNAPSHOT . .
	51	* \| . .
	52	* v . .
	53	* OVERWRITE RBD INFO < . . . .
	54	* \| .
	55	* v .
	56	* <finish> < . . . . . . . . . .`
	57	*
	58	* @endverbatim
	59	*/
	60
	61	librados::IoCtx m_io_ctx;
	62	CephContext* m_cct;
11fdf7f2 TL	63	Context* m_on_finish;
	64
	65	int m_ret_val = 0;
	66	bufferlist m_out_bl;
	67	uint64_t m_snap_id = 0;
	68
	69	void read_rbd_info();
	70	void handle_read_rbd_info(int r);
	71
	72	void create_snapshot();
	73	void handle_create_snapshot(int r);
	74
	75	void write_rbd_info();
	76	void handle_write_rbd_info(int r);
	77
	78	void remove_snapshot();
	79	void handle_remove_snapshot(int r);
	80
	81	void overwrite_rbd_info();
	82	void handle_overwrite_rbd_info(int r);
	83
	84	void finish(int r);
	85
	86	};
	87
	88	} // namespace image
	89	} // namespace librbd
	90
	91	extern template class librbd::image::ValidatePoolRequest<librbd::ImageCtx>;
	92
	93	#endif // CEPH_LIBRBD_IMAGE_VALIDATE_POOL_REQUEST_H