initial code repo

[stor4nfv.git] / src / ceph / src / os / filestore / GenericFileStoreBackend.h

diff --git a/src/ceph/src/os/filestore/GenericFileStoreBackend.h b/src/ceph/src/os/filestore/GenericFileStoreBackend.h
new file mode 100644 (file)
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+++ b/src/ceph/src/os/filestore/GenericFileStoreBackend.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_GENERICFILESTOREBACKEDN_H
+#define CEPH_GENERICFILESTOREBACKEDN_H
+
+#include "FileStore.h"
+
+class SloppyCRCMap;
+
+class GenericFileStoreBackend : public FileStoreBackend {
+private:
+  bool ioctl_fiemap;
+  bool seek_data_hole;
+  bool use_splice;
+  bool m_filestore_fiemap;
+  bool m_filestore_seek_data_hole;
+  bool m_filestore_fsync_flushes_journal_data;
+  bool m_filestore_splice;
+  bool m_rotational = true;
+  bool m_journal_rotational = true;
+public:
+  explicit GenericFileStoreBackend(FileStore *fs);
+  ~GenericFileStoreBackend() override {}
+
+  const char *get_name() override {
+    return "generic";
+  }
+  int detect_features() override;
+  int create_current() override;
+  bool can_checkpoint() override { return false; }
+  bool is_rotational() override {
+    return m_rotational;
+  }
+  bool is_journal_rotational() override {
+    return m_journal_rotational;
+  }
+  int list_checkpoints(list<string>& ls) override { return 0; }
+  int create_checkpoint(const string& name, uint64_t *cid) override { return -EOPNOTSUPP; }
+  int sync_checkpoint(uint64_t id) override { return -EOPNOTSUPP; }
+  int rollback_to(const string& name) override { return -EOPNOTSUPP; }
+  int destroy_checkpoint(const string& name) override { return -EOPNOTSUPP; }
+  int syncfs() override;
+  bool has_fiemap() override { return ioctl_fiemap; }
+  bool has_seek_data_hole() override { return seek_data_hole; }
+  int do_fiemap(int fd, off_t start, size_t len, struct fiemap **pfiemap) override;
+  int clone_range(int from, int to, uint64_t srcoff, uint64_t len, uint64_t dstoff) override {
+    return _copy_range(from, to, srcoff, len, dstoff);
+  }
+  int set_alloc_hint(int fd, uint64_t hint) override { return -EOPNOTSUPP; }
+  bool has_splice() const override { return use_splice; }
+private:
+  int _crc_load_or_init(int fd, SloppyCRCMap *cm);
+  int _crc_save(int fd, SloppyCRCMap *cm);
+public:
+  int _crc_update_write(int fd, loff_t off, size_t len, const bufferlist& bl) override;
+  int _crc_update_truncate(int fd, loff_t off) override;
+  int _crc_update_zero(int fd, loff_t off, size_t len) override;
+  int _crc_update_clone_range(int srcfd, int destfd,
+                                     loff_t srcoff, size_t len, loff_t dstoff) override;
+  int _crc_verify_read(int fd, loff_t off, size_t len, const bufferlist& bl,
+                              ostream *out) override;
+};
+#endif