summaryrefslogtreecommitdiffstats
path: root/src/rgw/rgw_cache.h
blob: e70beb0644620357740b7ce346698ca1261a35dd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp

#pragma once

#include <string>
#include <map>
#include <unordered_map>
#include "include/types.h"
#include "include/utime.h"
#include "include/ceph_assert.h"
#include "common/ceph_mutex.h"

#include "cls/version/cls_version_types.h"
#include "rgw_common.h"

enum {
  UPDATE_OBJ,
  INVALIDATE_OBJ,
};

#define CACHE_FLAG_DATA           0x01
#define CACHE_FLAG_XATTRS         0x02
#define CACHE_FLAG_META           0x04
#define CACHE_FLAG_MODIFY_XATTRS  0x08
#define CACHE_FLAG_OBJV           0x10

struct ObjectMetaInfo {
  uint64_t size;
  real_time mtime;

  ObjectMetaInfo() : size(0) {}

  void encode(bufferlist& bl) const {
    ENCODE_START(2, 2, bl);
    encode(size, bl);
    encode(mtime, bl);
    ENCODE_FINISH(bl);
  }
  void decode(bufferlist::const_iterator& bl) {
    DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, bl);
    decode(size, bl);
    decode(mtime, bl);
    DECODE_FINISH(bl);
  }
  void dump(Formatter *f) const;
  static void generate_test_instances(std::list<ObjectMetaInfo*>& o);
};
WRITE_CLASS_ENCODER(ObjectMetaInfo)

struct ObjectCacheInfo {
  int status = 0;
  uint32_t flags = 0;
  uint64_t epoch = 0;
  bufferlist data;
  std::map<std::string, bufferlist> xattrs;
  std::map<std::string, bufferlist> rm_xattrs;
  ObjectMetaInfo meta;
  obj_version version = {};
  ceph::coarse_mono_time time_added;

  ObjectCacheInfo() = default;

  void encode(bufferlist& bl) const {
    ENCODE_START(5, 3, bl);
    encode(status, bl);
    encode(flags, bl);
    encode(data, bl);
    encode(xattrs, bl);
    encode(meta, bl);
    encode(rm_xattrs, bl);
    encode(epoch, bl);
    encode(version, bl);
    ENCODE_FINISH(bl);
  }
  void decode(bufferlist::const_iterator& bl) {
    DECODE_START_LEGACY_COMPAT_LEN(5, 3, 3, bl);
    decode(status, bl);
    decode(flags, bl);
    decode(data, bl);
    decode(xattrs, bl);
    decode(meta, bl);
    if (struct_v >= 2)
      decode(rm_xattrs, bl);
    if (struct_v >= 4)
      decode(epoch, bl);
    if (struct_v >= 5)
      decode(version, bl);
    DECODE_FINISH(bl);
  }
  void dump(Formatter *f) const;
  static void generate_test_instances(std::list<ObjectCacheInfo*>& o);
};
WRITE_CLASS_ENCODER(ObjectCacheInfo)

struct RGWCacheNotifyInfo {
  uint32_t op;
  rgw_raw_obj obj;
  ObjectCacheInfo obj_info;
  off_t ofs;
  std::string ns;

  RGWCacheNotifyInfo() : op(0), ofs(0) {}

  void encode(bufferlist& obl) const {
    ENCODE_START(2, 2, obl);
    encode(op, obl);
    encode(obj, obl);
    encode(obj_info, obl);
    encode(ofs, obl);
    encode(ns, obl);
    ENCODE_FINISH(obl);
  }
  void decode(bufferlist::const_iterator& ibl) {
    DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, ibl);
    decode(op, ibl);
    decode(obj, ibl);
    decode(obj_info, ibl);
    decode(ofs, ibl);
    decode(ns, ibl);
    DECODE_FINISH(ibl);
  }
  void dump(Formatter *f) const;
  static void generate_test_instances(std::list<RGWCacheNotifyInfo*>& o);
};
WRITE_CLASS_ENCODER(RGWCacheNotifyInfo)
inline std::ostream& operator <<(std::ostream& m, const RGWCacheNotifyInfo& cni) {
  return m << "[op: " << cni.op << ", obj: " << cni.obj
	   << ", ofs" << cni.ofs << ", ns" << cni.ns << "]";
}


class RGWChainedCache {
public:
  virtual ~RGWChainedCache() {}
  virtual void chain_cb(const std::string& key, void *data) = 0;
  virtual void invalidate(const std::string& key) = 0;
  virtual void invalidate_all() = 0;
  virtual void unregistered() {}

  struct Entry {
    RGWChainedCache *cache;
    const std::string& key;
    void *data;

    Entry(RGWChainedCache *_c, const std::string& _k, void *_d) : cache(_c), key(_k), data(_d) {}
  };
};


struct ObjectCacheEntry {
  ObjectCacheInfo info;
  std::list<std::string>::iterator lru_iter;
  uint64_t lru_promotion_ts;
  uint64_t gen;
  std::vector<std::pair<RGWChainedCache *, std::string> > chained_entries;

  ObjectCacheEntry() : lru_promotion_ts(0), gen(0) {}
};

class ObjectCache {
  std::unordered_map<std::string, ObjectCacheEntry> cache_map;
  std::list<std::string> lru;
  unsigned long lru_size;
  unsigned long lru_counter;
  unsigned long lru_window;
  ceph::shared_mutex lock = ceph::make_shared_mutex("ObjectCache");
  CephContext *cct;

  std::vector<RGWChainedCache *> chained_cache;

  bool enabled;
  ceph::timespan expiry;

  void touch_lru(const DoutPrefixProvider *dpp, const std::string& name, ObjectCacheEntry& entry,
		 std::list<std::string>::iterator& lru_iter);
  void remove_lru(const std::string& name, std::list<std::string>::iterator& lru_iter);
  void invalidate_lru(ObjectCacheEntry& entry);

  void do_invalidate_all();

public:
  ObjectCache() : lru_size(0), lru_counter(0), lru_window(0), cct(NULL), enabled(false) { }
  ~ObjectCache();
  int get(const DoutPrefixProvider *dpp, const std::string& name, ObjectCacheInfo& bl, uint32_t mask, rgw_cache_entry_info *cache_info);
  std::optional<ObjectCacheInfo> get(const DoutPrefixProvider *dpp, const std::string& name) {
    std::optional<ObjectCacheInfo> info{std::in_place};
    auto r = get(dpp, name, *info, 0, nullptr);
    return r < 0 ? std::nullopt : info;
  }

  template<typename F>
  void for_each(const F& f) {
    std::shared_lock l{lock};
    if (enabled) {
      auto now  = ceph::coarse_mono_clock::now();
      for (const auto& [name, entry] : cache_map) {
        if (expiry.count() && (now - entry.info.time_added) < expiry) {
          f(name, entry);
        }
      }
    }
  }

  void put(const DoutPrefixProvider *dpp, const std::string& name, ObjectCacheInfo& bl, rgw_cache_entry_info *cache_info);
  bool invalidate_remove(const DoutPrefixProvider *dpp, const std::string& name);
  void set_ctx(CephContext *_cct) {
    cct = _cct;
    lru_window = cct->_conf->rgw_cache_lru_size / 2;
    expiry = std::chrono::seconds(cct->_conf.get_val<uint64_t>(
						"rgw_cache_expiry_interval"));
  }
  bool chain_cache_entry(const DoutPrefixProvider *dpp,
                         std::initializer_list<rgw_cache_entry_info*> cache_info_entries,
			 RGWChainedCache::Entry *chained_entry);

  void set_enabled(bool status);

  void chain_cache(RGWChainedCache *cache);
  void unchain_cache(RGWChainedCache *cache);
  void invalidate_all();
};