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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_GENERICFILESTOREBACKEDN_H | |
16 | #define CEPH_GENERICFILESTOREBACKEDN_H | |
17 | ||
18 | #include "FileStore.h" | |
19 | ||
20 | class SloppyCRCMap; | |
21 | ||
22 | class GenericFileStoreBackend : public FileStoreBackend { | |
23 | private: | |
24 | bool ioctl_fiemap; | |
25 | bool seek_data_hole; | |
26 | bool use_splice; | |
27 | bool m_filestore_fiemap; | |
28 | bool m_filestore_seek_data_hole; | |
29 | bool m_filestore_fsync_flushes_journal_data; | |
30 | bool m_filestore_splice; | |
31f18b77 | 31 | bool m_rotational = true; |
d2e6a577 | 32 | bool m_journal_rotational = true; |
7c673cae FG |
33 | public: |
34 | explicit GenericFileStoreBackend(FileStore *fs); | |
35 | ~GenericFileStoreBackend() override {} | |
36 | ||
37 | const char *get_name() override { | |
38 | return "generic"; | |
39 | } | |
40 | int detect_features() override; | |
41 | int create_current() override; | |
42 | bool can_checkpoint() override { return false; } | |
31f18b77 FG |
43 | bool is_rotational() override { |
44 | return m_rotational; | |
45 | } | |
d2e6a577 FG |
46 | bool is_journal_rotational() override { |
47 | return m_journal_rotational; | |
48 | } | |
7c673cae FG |
49 | int list_checkpoints(list<string>& ls) override { return 0; } |
50 | int create_checkpoint(const string& name, uint64_t *cid) override { return -EOPNOTSUPP; } | |
51 | int sync_checkpoint(uint64_t id) override { return -EOPNOTSUPP; } | |
52 | int rollback_to(const string& name) override { return -EOPNOTSUPP; } | |
53 | int destroy_checkpoint(const string& name) override { return -EOPNOTSUPP; } | |
54 | int syncfs() override; | |
55 | bool has_fiemap() override { return ioctl_fiemap; } | |
56 | bool has_seek_data_hole() override { return seek_data_hole; } | |
57 | int do_fiemap(int fd, off_t start, size_t len, struct fiemap **pfiemap) override; | |
58 | int clone_range(int from, int to, uint64_t srcoff, uint64_t len, uint64_t dstoff) override { | |
59 | return _copy_range(from, to, srcoff, len, dstoff); | |
60 | } | |
61 | int set_alloc_hint(int fd, uint64_t hint) override { return -EOPNOTSUPP; } | |
62 | bool has_splice() const override { return use_splice; } | |
63 | private: | |
64 | int _crc_load_or_init(int fd, SloppyCRCMap *cm); | |
65 | int _crc_save(int fd, SloppyCRCMap *cm); | |
66 | public: | |
67 | int _crc_update_write(int fd, loff_t off, size_t len, const bufferlist& bl) override; | |
68 | int _crc_update_truncate(int fd, loff_t off) override; | |
69 | int _crc_update_zero(int fd, loff_t off, size_t len) override; | |
70 | int _crc_update_clone_range(int srcfd, int destfd, | |
71 | loff_t srcoff, size_t len, loff_t dstoff) override; | |
72 | int _crc_verify_read(int fd, loff_t off, size_t len, const bufferlist& bl, | |
73 | ostream *out) override; | |
74 | }; | |
75 | #endif |