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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_WATCHER_REWATCH_REQUEST_H
#define CEPH_LIBRBD_WATCHER_REWATCH_REQUEST_H
#include "common/ceph_mutex.h"
#include "include/int_types.h"
#include "include/rados/librados.hpp"
struct Context;
namespace librbd {
namespace watcher {
class RewatchRequest {
public:
static RewatchRequest *create(librados::IoCtx& ioctx, const std::string& oid,
ceph::shared_mutex &watch_lock,
librados::WatchCtx2 *watch_ctx,
uint64_t *watch_handle, Context *on_finish) {
return new RewatchRequest(ioctx, oid, watch_lock, watch_ctx, watch_handle,
on_finish);
}
RewatchRequest(librados::IoCtx& ioctx, const std::string& oid,
ceph::shared_mutex &watch_lock, librados::WatchCtx2 *watch_ctx,
uint64_t *watch_handle, Context *on_finish);
void send();
private:
/**
* @verbatim
*
* <start>
* |
* v
* UNWATCH
* |
* | . . . .
* | . . (recoverable error)
* v v .
* REWATCH . . .
* |
* v
* <finish>
*
* @endverbatim
*/
librados::IoCtx& m_ioctx;
std::string m_oid;
ceph::shared_mutex &m_watch_lock;
librados::WatchCtx2 *m_watch_ctx;
uint64_t *m_watch_handle;
Context *m_on_finish;
uint64_t m_rewatch_handle = 0;
void unwatch();
void handle_unwatch(int r);
void rewatch();
void handle_rewatch(int r);
void finish(int r);
};
} // namespace watcher
} // namespace librbd
#endif // CEPH_LIBRBD_WATCHER_REWATCH_REQUEST_H
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