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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp
#ifndef CEPH_RGWCACHE_H
#define CEPH_RGWCACHE_H
#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,
REMOVE_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(list<ObjectMetaInfo*>& o);
};
WRITE_CLASS_ENCODER(ObjectMetaInfo)
struct ObjectCacheInfo {
int status = 0;
uint32_t flags = 0;
uint64_t epoch = 0;
bufferlist data;
map<string, bufferlist> xattrs;
map<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(list<ObjectCacheInfo*>& o);
};
WRITE_CLASS_ENCODER(ObjectCacheInfo)
struct RGWCacheNotifyInfo {
uint32_t op;
rgw_raw_obj obj;
ObjectCacheInfo obj_info;
off_t ofs;
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(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 string& key, void *data) = 0;
virtual void invalidate(const string& key) = 0;
virtual void invalidate_all() = 0;
virtual void unregistered() {}
struct Entry {
RGWChainedCache *cache;
const string& key;
void *data;
Entry(RGWChainedCache *_c, const string& _k, void *_d) : cache(_c), key(_k), data(_d) {}
};
};
struct ObjectCacheEntry {
ObjectCacheInfo info;
std::list<string>::iterator lru_iter;
uint64_t lru_promotion_ts;
uint64_t gen;
std::vector<pair<RGWChainedCache *, string> > chained_entries;
ObjectCacheEntry() : lru_promotion_ts(0), gen(0) {}
};
class ObjectCache {
std::unordered_map<string, ObjectCacheEntry> cache_map;
std::list<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;
vector<RGWChainedCache *> chained_cache;
bool enabled;
ceph::timespan expiry;
void touch_lru(const DoutPrefixProvider *dpp, const string& name, ObjectCacheEntry& entry,
std::list<string>::iterator& lru_iter);
void remove_lru(const string& name, std::list<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 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();
};
#endif
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