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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
#pragma once
#include <atomic>
#include "include/stringify.h"
#include "rgw_coroutine.h"
#include "rgw_http_client.h"
#include "rgw_metadata.h"
#include "rgw_meta_sync_status.h"
#include "rgw_sal.h"
#include "rgw_sal_rados.h"
#include "rgw_sync_trace.h"
#include "rgw_mdlog.h"
#define ERROR_LOGGER_SHARDS 32
#define RGW_SYNC_ERROR_LOG_SHARD_PREFIX "sync.error-log"
struct rgw_mdlog_info {
uint32_t num_shards;
std::string period; //< period id of the master's oldest metadata log
epoch_t realm_epoch; //< realm epoch of oldest metadata log
rgw_mdlog_info() : num_shards(0), realm_epoch(0) {}
void decode_json(JSONObj *obj);
};
struct rgw_mdlog_entry {
std::string id;
std::string section;
std::string name;
ceph::real_time timestamp;
RGWMetadataLogData log_data;
void decode_json(JSONObj *obj);
bool convert_from(cls_log_entry& le) {
id = le.id;
section = le.section;
name = le.name;
timestamp = le.timestamp.to_real_time();
try {
auto iter = le.data.cbegin();
decode(log_data, iter);
} catch (buffer::error& err) {
return false;
}
return true;
}
};
struct rgw_mdlog_shard_data {
std::string marker;
bool truncated;
std::vector<rgw_mdlog_entry> entries;
void decode_json(JSONObj *obj);
};
class RGWAsyncRadosProcessor;
class RGWMetaSyncStatusManager;
class RGWMetaSyncCR;
class RGWRESTConn;
class RGWSyncTraceManager;
class RGWSyncErrorLogger {
rgw::sal::RadosStore* store;
std::vector<std::string> oids;
int num_shards;
std::atomic<int64_t> counter = { 0 };
public:
RGWSyncErrorLogger(rgw::sal::RadosStore* _store, const std::string &oid_prefix, int _num_shards);
RGWCoroutine *log_error_cr(const DoutPrefixProvider *dpp, const std::string& source_zone, const std::string& section, const std::string& name, uint32_t error_code, const std::string& message);
static std::string get_shard_oid(const std::string& oid_prefix, int shard_id);
};
struct rgw_sync_error_info {
std::string source_zone;
uint32_t error_code;
std::string message;
rgw_sync_error_info() : error_code(0) {}
rgw_sync_error_info(const std::string& _source_zone, uint32_t _error_code, const std::string& _message) : source_zone(_source_zone), error_code(_error_code), message(_message) {}
void encode(bufferlist& bl) const {
ENCODE_START(1, 1, bl);
encode(source_zone, bl);
encode(error_code, bl);
encode(message, bl);
ENCODE_FINISH(bl);
}
void decode(bufferlist::const_iterator& bl) {
DECODE_START(1, bl);
decode(source_zone, bl);
decode(error_code, bl);
decode(message, bl);
DECODE_FINISH(bl);
}
void dump(Formatter *f) const;
};
WRITE_CLASS_ENCODER(rgw_sync_error_info)
#define DEFAULT_BACKOFF_MAX 30
class RGWSyncBackoff {
int cur_wait;
int max_secs;
void update_wait_time();
public:
explicit RGWSyncBackoff(int _max_secs = DEFAULT_BACKOFF_MAX) : cur_wait(0), max_secs(_max_secs) {}
void backoff_sleep();
void reset() {
cur_wait = 0;
}
void backoff(RGWCoroutine *op);
};
class RGWBackoffControlCR : public RGWCoroutine
{
RGWCoroutine *cr;
ceph::mutex lock;
RGWSyncBackoff backoff;
bool reset_backoff;
bool exit_on_error;
protected:
bool *backoff_ptr() {
return &reset_backoff;
}
ceph::mutex& cr_lock() {
return lock;
}
RGWCoroutine *get_cr() {
return cr;
}
public:
RGWBackoffControlCR(CephContext *_cct, bool _exit_on_error)
: RGWCoroutine(_cct),
cr(nullptr),
lock(ceph::make_mutex("RGWBackoffControlCR::lock:" + stringify(this))),
reset_backoff(false), exit_on_error(_exit_on_error) {
}
~RGWBackoffControlCR() override {
if (cr) {
cr->put();
}
}
virtual RGWCoroutine *alloc_cr() = 0;
virtual RGWCoroutine *alloc_finisher_cr() { return NULL; }
int operate(const DoutPrefixProvider *dpp) override;
};
struct RGWMetaSyncEnv {
const DoutPrefixProvider *dpp;
CephContext *cct{nullptr};
rgw::sal::RadosStore* store{nullptr};
RGWRESTConn *conn{nullptr};
RGWAsyncRadosProcessor *async_rados{nullptr};
RGWHTTPManager *http_manager{nullptr};
RGWSyncErrorLogger *error_logger{nullptr};
RGWSyncTraceManager *sync_tracer{nullptr};
RGWMetaSyncEnv() {}
void init(const DoutPrefixProvider *_dpp, CephContext *_cct, rgw::sal::RadosStore* _store, RGWRESTConn *_conn,
RGWAsyncRadosProcessor *_async_rados, RGWHTTPManager *_http_manager,
RGWSyncErrorLogger *_error_logger, RGWSyncTraceManager *_sync_tracer);
std::string shard_obj_name(int shard_id);
std::string status_oid();
};
class RGWRemoteMetaLog : public RGWCoroutinesManager {
const DoutPrefixProvider *dpp;
rgw::sal::RadosStore* store;
RGWRESTConn *conn;
RGWAsyncRadosProcessor *async_rados;
RGWHTTPManager http_manager;
RGWMetaSyncStatusManager *status_manager;
RGWSyncErrorLogger *error_logger{nullptr};
RGWSyncTraceManager *sync_tracer{nullptr};
RGWMetaSyncCR *meta_sync_cr{nullptr};
RGWSyncBackoff backoff;
RGWMetaSyncEnv sync_env;
void init_sync_env(RGWMetaSyncEnv *env);
int store_sync_info(const DoutPrefixProvider *dpp, const rgw_meta_sync_info& sync_info);
std::atomic<bool> going_down = { false };
RGWSyncTraceNodeRef tn;
public:
RGWRemoteMetaLog(const DoutPrefixProvider *dpp, rgw::sal::RadosStore* _store,
RGWAsyncRadosProcessor *async_rados,
RGWMetaSyncStatusManager *_sm)
: RGWCoroutinesManager(_store->ctx(), _store->getRados()->get_cr_registry()),
dpp(dpp), store(_store), conn(NULL), async_rados(async_rados),
http_manager(store->ctx(), completion_mgr),
status_manager(_sm) {}
virtual ~RGWRemoteMetaLog() override;
int init();
void finish();
int read_log_info(const DoutPrefixProvider *dpp, rgw_mdlog_info *log_info);
int read_master_log_shards_info(const DoutPrefixProvider *dpp, const std::string& master_period, std::map<int, RGWMetadataLogInfo> *shards_info);
int read_master_log_shards_next(const DoutPrefixProvider *dpp, const std::string& period, std::map<int, std::string> shard_markers, std::map<int, rgw_mdlog_shard_data> *result);
int read_sync_status(const DoutPrefixProvider *dpp, rgw_meta_sync_status *sync_status);
int init_sync_status(const DoutPrefixProvider *dpp);
int run_sync(const DoutPrefixProvider *dpp, optional_yield y);
void wakeup(int shard_id);
RGWMetaSyncEnv& get_sync_env() {
return sync_env;
}
};
class RGWMetaSyncStatusManager : public DoutPrefixProvider {
rgw::sal::RadosStore* store;
librados::IoCtx ioctx;
RGWRemoteMetaLog master_log;
std::map<int, rgw_raw_obj> shard_objs;
struct utime_shard {
real_time ts;
int shard_id;
utime_shard() : shard_id(-1) {}
bool operator<(const utime_shard& rhs) const {
if (ts == rhs.ts) {
return shard_id < rhs.shard_id;
}
return ts < rhs.ts;
}
};
ceph::shared_mutex ts_to_shard_lock = ceph::make_shared_mutex("ts_to_shard_lock");
std::map<utime_shard, int> ts_to_shard;
std::vector<std::string> clone_markers;
public:
RGWMetaSyncStatusManager(rgw::sal::RadosStore* _store, RGWAsyncRadosProcessor *async_rados)
: store(_store), master_log(this, store, async_rados, this)
{}
virtual ~RGWMetaSyncStatusManager() override;
int init(const DoutPrefixProvider *dpp);
int read_sync_status(const DoutPrefixProvider *dpp, rgw_meta_sync_status *sync_status) {
return master_log.read_sync_status(dpp, sync_status);
}
int init_sync_status(const DoutPrefixProvider *dpp) { return master_log.init_sync_status(dpp); }
int read_log_info(const DoutPrefixProvider *dpp, rgw_mdlog_info *log_info) {
return master_log.read_log_info(dpp, log_info);
}
int read_master_log_shards_info(const DoutPrefixProvider *dpp, const std::string& master_period, std::map<int, RGWMetadataLogInfo> *shards_info) {
return master_log.read_master_log_shards_info(dpp, master_period, shards_info);
}
int read_master_log_shards_next(const DoutPrefixProvider *dpp, const std::string& period, std::map<int, std::string> shard_markers, std::map<int, rgw_mdlog_shard_data> *result) {
return master_log.read_master_log_shards_next(dpp, period, shard_markers, result);
}
int run(const DoutPrefixProvider *dpp, optional_yield y) { return master_log.run_sync(dpp, y); }
// implements DoutPrefixProvider
CephContext *get_cct() const override { return store->ctx(); }
unsigned get_subsys() const override;
std::ostream& gen_prefix(std::ostream& out) const override;
void wakeup(int shard_id) { return master_log.wakeup(shard_id); }
void stop() {
master_log.finish();
}
};
class RGWOrderCallCR : public RGWCoroutine
{
public:
RGWOrderCallCR(CephContext *cct) : RGWCoroutine(cct) {}
virtual void call_cr(RGWCoroutine *_cr) = 0;
};
class RGWLastCallerWinsCR : public RGWOrderCallCR
{
RGWCoroutine *cr{nullptr};
public:
explicit RGWLastCallerWinsCR(CephContext *cct) : RGWOrderCallCR(cct) {}
~RGWLastCallerWinsCR() {
if (cr) {
cr->put();
}
}
int operate(const DoutPrefixProvider *dpp) override;
void call_cr(RGWCoroutine *_cr) override {
if (cr) {
cr->put();
}
cr = _cr;
}
};
template <class T, class K>
class RGWSyncShardMarkerTrack {
struct marker_entry {
uint64_t pos;
real_time timestamp;
marker_entry() : pos(0) {}
marker_entry(uint64_t _p, const real_time& _ts) : pos(_p), timestamp(_ts) {}
};
typename std::map<T, marker_entry> pending;
std::map<T, marker_entry> finish_markers;
int window_size;
int updates_since_flush;
RGWOrderCallCR *order_cr{nullptr};
protected:
typename std::set<K> need_retry_set;
virtual RGWCoroutine *store_marker(const T& new_marker, uint64_t index_pos, const real_time& timestamp) = 0;
virtual RGWOrderCallCR *allocate_order_control_cr() = 0;
virtual void handle_finish(const T& marker) { }
public:
RGWSyncShardMarkerTrack(int _window_size) : window_size(_window_size), updates_since_flush(0) {}
virtual ~RGWSyncShardMarkerTrack() {
if (order_cr) {
order_cr->put();
}
}
bool start(const T& pos, int index_pos, const real_time& timestamp) {
if (pending.find(pos) != pending.end()) {
return false;
}
pending[pos] = marker_entry(index_pos, timestamp);
return true;
}
void try_update_high_marker(const T& pos, int index_pos, const real_time& timestamp) {
finish_markers[pos] = marker_entry(index_pos, timestamp);
}
RGWCoroutine *finish(const T& pos) {
if (pending.empty()) {
/* can happen, due to a bug that ended up with multiple objects with the same name and version
* -- which can happen when versioning is enabled an the version is 'null'.
*/
return NULL;
}
typename std::map<T, marker_entry>::iterator iter = pending.begin();
bool is_first = (pos == iter->first);
typename std::map<T, marker_entry>::iterator pos_iter = pending.find(pos);
if (pos_iter == pending.end()) {
/* see pending.empty() comment */
return NULL;
}
finish_markers[pos] = pos_iter->second;
pending.erase(pos);
handle_finish(pos);
updates_since_flush++;
if (is_first && (updates_since_flush >= window_size || pending.empty())) {
return flush();
}
return NULL;
}
RGWCoroutine *flush() {
if (finish_markers.empty()) {
return NULL;
}
typename std::map<T, marker_entry>::iterator i;
if (pending.empty()) {
i = finish_markers.end();
} else {
i = finish_markers.lower_bound(pending.begin()->first);
}
if (i == finish_markers.begin()) {
return NULL;
}
updates_since_flush = 0;
auto last = i;
--i;
const T& high_marker = i->first;
marker_entry& high_entry = i->second;
RGWCoroutine *cr = order(store_marker(high_marker, high_entry.pos, high_entry.timestamp));
finish_markers.erase(finish_markers.begin(), last);
return cr;
}
/*
* a key needs retry if it was processing when another marker that points
* to the same bucket shards arrives. Instead of processing it, we mark
* it as need_retry so that when we finish processing the original, we
* retry the processing on the same bucket shard, in case there are more
* entries to process. This closes a race that can happen.
*/
bool need_retry(const K& key) {
return (need_retry_set.find(key) != need_retry_set.end());
}
void set_need_retry(const K& key) {
need_retry_set.insert(key);
}
void reset_need_retry(const K& key) {
need_retry_set.erase(key);
}
RGWCoroutine *order(RGWCoroutine *cr) {
/* either returns a new RGWLastWriteWinsCR, or update existing one, in which case it returns
* nothing and the existing one will call the cr
*/
if (order_cr && order_cr->is_done()) {
order_cr->put();
order_cr = nullptr;
}
if (!order_cr) {
order_cr = allocate_order_control_cr();
order_cr->get();
order_cr->call_cr(cr);
return order_cr;
}
order_cr->call_cr(cr);
return nullptr; /* don't call it a second time */
}
};
class RGWMetaSyncShardMarkerTrack;
class RGWMetaSyncSingleEntryCR : public RGWCoroutine {
RGWMetaSyncEnv *sync_env;
std::string raw_key;
std::string entry_marker;
RGWMDLogStatus op_status;
ssize_t pos;
std::string section;
std::string key;
int sync_status;
bufferlist md_bl;
RGWMetaSyncShardMarkerTrack *marker_tracker;
int tries;
bool error_injection;
RGWSyncTraceNodeRef tn;
public:
RGWMetaSyncSingleEntryCR(RGWMetaSyncEnv *_sync_env,
const std::string& _raw_key, const std::string& _entry_marker,
const RGWMDLogStatus& _op_status,
RGWMetaSyncShardMarkerTrack *_marker_tracker, const RGWSyncTraceNodeRef& _tn_parent);
int operate(const DoutPrefixProvider *dpp) override;
};
class RGWShardCollectCR : public RGWCoroutine {
int current_running = 0;
protected:
int max_concurrent;
int status = 0;
// called with the result of each child. error codes can be ignored by
// returning 0. if handle_result() returns a negative value, it's
// treated as an error and stored in 'status'. the last such error is
// reported to the caller with set_cr_error()
virtual int handle_result(int r) = 0;
public:
RGWShardCollectCR(CephContext *_cct, int _max_concurrent)
: RGWCoroutine(_cct), max_concurrent(_max_concurrent)
{}
virtual bool spawn_next() = 0;
int operate(const DoutPrefixProvider *dpp) override;
};
// factory functions for meta sync coroutines needed in mdlog trimming
RGWCoroutine* create_read_remote_mdlog_shard_info_cr(RGWMetaSyncEnv *env,
const std::string& period,
int shard_id,
RGWMetadataLogInfo* info);
RGWCoroutine* create_list_remote_mdlog_shard_cr(RGWMetaSyncEnv *env,
const std::string& period,
int shard_id,
const std::string& marker,
uint32_t max_entries,
rgw_mdlog_shard_data *result);
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