ceph/src/librbd/crypto/luks/FlattenRequest.h

   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_CRYPTO_LUKS_FLATTEN_REQUEST_H
   5 #define CEPH_LIBRBD_CRYPTO_LUKS_FLATTEN_REQUEST_H
   6
   7 #include "librbd/ImageCtx.h"
   8
   9 namespace librbd {
  10
  11 namespace crypto {
  12 namespace luks {
  13
  14 template <typename I>
  15 class FlattenRequest {
  16 public:
  17     using EncryptionFormat = decltype(I::encryption_format);
  18
  19     static FlattenRequest* create(I* image_ctx, Context* on_finish) {
  20       return new FlattenRequest(image_ctx, on_finish);
  21     }
  22
  23     FlattenRequest(I* image_ctx, Context* on_finish);
  24     void send();
  25
  26 private:
  27   /**
  28    * @verbatim
  29    *
  30    * <start>
  31    *    |
  32    *    v
  33    * READ_HEADER
  34    *    |
  35    *    v
  36    * WRITE_HEADER (replacing magic back from RBDL to LUKS if needed)
  37    *    |
  38    *    v
  39    * FLUSH
  40    *    |
  41    *    v
  42    * <finish>
  43    *
  44    * @endverbatim
  45    */
  46     I* m_image_ctx;
  47     Context* m_on_finish;
  48     ceph::bufferlist m_bl;
  49
  50     void read_header();
  51     void handle_read_header(int r);
  52     void write_header();
  53     void handle_write_header(int r);
  54     void flush();
  55     void handle_flush(int r);
  56     void finish(int r);
  57 };
  58
  59 } // namespace luks
  60 } // namespace crypto
  61 } // namespace librbd
  62
  63 extern template class librbd::crypto::luks::FlattenRequest<librbd::ImageCtx>;
  64
  65 #endif // CEPH_LIBRBD_CRYPTO_LUKS_FLATTEN_REQUEST_H