ceph/src/os/filestore/BtrfsFileStoreBackend.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPH_BTRFSFILESTOREBACKEDN_H
  16 #define CEPH_BTRFSFILESTOREBACKEDN_H
  17
  18 #if defined(__linux__)
  19 #include "GenericFileStoreBackend.h"
  20
  21 class BtrfsFileStoreBackend : public GenericFileStoreBackend {
  22 private:
  23   bool has_clone_range;       ///< clone range ioctl is supported
  24   bool has_snap_create;       ///< snap create ioctl is supported
  25   bool has_snap_destroy;      ///< snap destroy ioctl is supported
  26   bool has_snap_create_v2;    ///< snap create v2 ioctl (async!) is supported
  27   bool has_wait_sync;         ///< wait sync ioctl is supported
  28   bool stable_commits;
  29   bool m_filestore_btrfs_clone_range;
  30   bool m_filestore_btrfs_snap;
  31 public:
  32   explicit BtrfsFileStoreBackend(FileStore *fs);
  33   ~BtrfsFileStoreBackend() override {}
  34   const char *get_name() override {
  35     return "btrfs";
  36   }
  37   int detect_features() override;
  38   bool can_checkpoint() override;
  39   int create_current() override;
  40   int list_checkpoints(std::list<std::string>& ls) override;
  41   int create_checkpoint(const std::string& name, uint64_t *cid) override;
  42   int sync_checkpoint(uint64_t cid) override;
  43   int rollback_to(const std::string& name) override;
  44   int destroy_checkpoint(const std::string& name) override;
  45   int syncfs() override;
  46   int clone_range(int from, int to, uint64_t srcoff, uint64_t len, uint64_t dstoff) override;
  47 };
  48 #endif
  49 #endif