Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 88 insertions, 0 deletions

diff --git a/src/tools/rbd_ggate/Server.h b/src/tools/rbd_ggate/Server.h
new file mode 100644
index 00000000..8ed4f512
--- /dev/null
+++ b/src/tools/rbd_ggate/Server.h
@@ -0,0 +1,88 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_RBD_GGATE_SERVER_H
+#define CEPH_RBD_GGATE_SERVER_H
+
+#include "include/rbd/librbd.hpp"
+#include "include/xlist.h"
+#include "common/Cond.h"
+#include "common/Mutex.h"
+#include "common/Thread.h"
+
+namespace rbd {
+namespace ggate {
+
+class Driver;
+struct Request;
+
+class Server {
+public:
+  Server(Driver *drv, librbd::Image& image);
+
+  void run();
+
+private:
+  struct IOContext {
+    xlist<IOContext*>::item item;
+    Server *server;
+    Request *req = nullptr;
+
+    IOContext(Server *server) : item(this), server(server) {
+    }
+  };
+
+  class ThreadHelper : public Thread {
+  public:
+    typedef void (Server::*entry_func)();
+
+    ThreadHelper(Server *server, entry_func func)
+      : server(server), func(func) {
+    }
+
+  protected:
+    virtual void* entry() {
+      (server->*func)();
+      return nullptr;
+    }
+
+  private:
+    Server *server;
+    entry_func func;
+  };
+
+  friend std::ostream &operator<<(std::ostream &os, const IOContext &ctx);
+
+  Driver *m_drv;
+  librbd::Image &m_image;
+
+  mutable Mutex m_lock;
+  Cond m_cond;
+  bool m_stopping = false;
+  ThreadHelper m_reader_thread, m_writer_thread;
+  xlist<IOContext*> m_io_pending;
+  xlist<IOContext*> m_io_finished;
+
+  static void aio_callback(librbd::completion_t cb, void *arg);
+
+  int start();
+  void stop();
+
+  void reader_entry();
+  void writer_entry();
+
+  void io_start(IOContext *ctx);
+  void io_finish(IOContext *ctx);
+
+  IOContext *wait_io_finish();
+  void wait_clean();
+
+  void handle_aio(IOContext *ctx, int r);
+};
+
+std::ostream &operator<<(std::ostream &os, const Server::IOContext &ctx);
+
+} // namespace ggate
+} // namespace rbd
+
+#endif // CEPH_RBD_GGATE_SERVER_H