--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <boost/optional.hpp>
+
+#include "common/ceph_json.h"
+#include "common/RWLock.h"
+#include "common/RefCountedObj.h"
+#include "common/WorkQueue.h"
+#include "common/Throttle.h"
+#include "common/admin_socket.h"
+#include "common/errno.h"
+
+#include "rgw_common.h"
+#include "rgw_rados.h"
+#include "rgw_sync.h"
+#include "rgw_metadata.h"
+#include "rgw_rest_conn.h"
+#include "rgw_tools.h"
+#include "rgw_cr_rados.h"
+#include "rgw_cr_rest.h"
+#include "rgw_http_client.h"
+
+#include "cls/lock/cls_lock_client.h"
+
+#include <boost/asio/yield.hpp>
+
+#define dout_subsys ceph_subsys_rgw
+
+#undef dout_prefix
+#define dout_prefix (*_dout << "meta sync: ")
+
+static string mdlog_sync_status_oid = "mdlog.sync-status";
+static string mdlog_sync_status_shard_prefix = "mdlog.sync-status.shard";
+static string mdlog_sync_full_sync_index_prefix = "meta.full-sync.index";
+
+RGWSyncErrorLogger::RGWSyncErrorLogger(RGWRados *_store, const string &oid_prefix, int _num_shards) : store(_store), num_shards(_num_shards) {
+ for (int i = 0; i < num_shards; i++) {
+ oids.push_back(get_shard_oid(oid_prefix, i));
+ }
+}
+string RGWSyncErrorLogger::get_shard_oid(const string& oid_prefix, int shard_id) {
+ char buf[oid_prefix.size() + 16];
+ snprintf(buf, sizeof(buf), "%s.%d", oid_prefix.c_str(), shard_id);
+ return string(buf);
+}
+
+RGWCoroutine *RGWSyncErrorLogger::log_error_cr(const string& source_zone, const string& section, const string& name, uint32_t error_code, const string& message) {
+ cls_log_entry entry;
+
+ rgw_sync_error_info info(source_zone, error_code, message);
+ bufferlist bl;
+ ::encode(info, bl);
+ store->time_log_prepare_entry(entry, real_clock::now(), section, name, bl);
+
+ uint32_t shard_id = ++counter % num_shards;
+
+
+ return new RGWRadosTimelogAddCR(store, oids[shard_id], entry);
+}
+
+void RGWSyncBackoff::update_wait_time()
+{
+ if (cur_wait == 0) {
+ cur_wait = 1;
+ } else {
+ cur_wait = (cur_wait << 1);
+ }
+ if (cur_wait >= max_secs) {
+ cur_wait = max_secs;
+ }
+}
+
+void RGWSyncBackoff::backoff_sleep()
+{
+ update_wait_time();
+ sleep(cur_wait);
+}
+
+void RGWSyncBackoff::backoff(RGWCoroutine *op)
+{
+ update_wait_time();
+ op->wait(utime_t(cur_wait, 0));
+}
+
+int RGWBackoffControlCR::operate() {
+ reenter(this) {
+ // retry the operation until it succeeds
+ while (true) {
+ yield {
+ Mutex::Locker l(lock);
+ cr = alloc_cr();
+ cr->get();
+ call(cr);
+ }
+ {
+ Mutex::Locker l(lock);
+ cr->put();
+ cr = NULL;
+ }
+ if (retcode >= 0) {
+ break;
+ }
+ if (retcode != -EBUSY && retcode != -EAGAIN) {
+ ldout(cct, 0) << "ERROR: RGWBackoffControlCR called coroutine returned " << retcode << dendl;
+ if (exit_on_error) {
+ return set_cr_error(retcode);
+ }
+ }
+ if (reset_backoff) {
+ backoff.reset();
+ }
+ yield backoff.backoff(this);
+ }
+
+ // run an optional finisher
+ yield call(alloc_finisher_cr());
+ if (retcode < 0) {
+ ldout(cct, 0) << "ERROR: call to finisher_cr() failed: retcode=" << retcode << dendl;
+ return set_cr_error(retcode);
+ }
+ return set_cr_done();
+ }
+ return 0;
+}
+
+void rgw_mdlog_info::decode_json(JSONObj *obj) {
+ JSONDecoder::decode_json("num_objects", num_shards, obj);
+ JSONDecoder::decode_json("period", period, obj);
+ JSONDecoder::decode_json("realm_epoch", realm_epoch, obj);
+}
+
+void rgw_mdlog_entry::decode_json(JSONObj *obj) {
+ JSONDecoder::decode_json("id", id, obj);
+ JSONDecoder::decode_json("section", section, obj);
+ JSONDecoder::decode_json("name", name, obj);
+ utime_t ut;
+ JSONDecoder::decode_json("timestamp", ut, obj);
+ timestamp = ut.to_real_time();
+ JSONDecoder::decode_json("data", log_data, obj);
+}
+
+void rgw_mdlog_shard_data::decode_json(JSONObj *obj) {
+ JSONDecoder::decode_json("marker", marker, obj);
+ JSONDecoder::decode_json("truncated", truncated, obj);
+ JSONDecoder::decode_json("entries", entries, obj);
+};
+
+int RGWShardCollectCR::operate() {
+ reenter(this) {
+ while (spawn_next()) {
+ current_running++;
+
+ while (current_running >= max_concurrent) {
+ int child_ret;
+ yield wait_for_child();
+ if (collect_next(&child_ret)) {
+ current_running--;
+ if (child_ret < 0 && child_ret != -ENOENT) {
+ ldout(cct, 10) << __func__ << ": failed to fetch log status, ret=" << child_ret << dendl;
+ status = child_ret;
+ }
+ }
+ }
+ }
+ while (current_running > 0) {
+ int child_ret;
+ yield wait_for_child();
+ if (collect_next(&child_ret)) {
+ current_running--;
+ if (child_ret < 0 && child_ret != -ENOENT) {
+ ldout(cct, 10) << __func__ << ": failed to fetch log status, ret=" << child_ret << dendl;
+ status = child_ret;
+ }
+ }
+ }
+ if (status < 0) {
+ return set_cr_error(status);
+ }
+ return set_cr_done();
+ }
+ return 0;
+}
+
+class RGWReadRemoteMDLogInfoCR : public RGWShardCollectCR {
+ RGWMetaSyncEnv *sync_env;
+
+ const std::string& period;
+ int num_shards;
+ map<int, RGWMetadataLogInfo> *mdlog_info;
+
+ int shard_id;
+#define READ_MDLOG_MAX_CONCURRENT 10
+
+public:
+ RGWReadRemoteMDLogInfoCR(RGWMetaSyncEnv *_sync_env,
+ const std::string& period, int _num_shards,
+ map<int, RGWMetadataLogInfo> *_mdlog_info) : RGWShardCollectCR(_sync_env->cct, READ_MDLOG_MAX_CONCURRENT),
+ sync_env(_sync_env),
+ period(period), num_shards(_num_shards),
+ mdlog_info(_mdlog_info), shard_id(0) {}
+ bool spawn_next() override;
+};
+
+class RGWListRemoteMDLogCR : public RGWShardCollectCR {
+ RGWMetaSyncEnv *sync_env;
+
+ const std::string& period;
+ map<int, string> shards;
+ int max_entries_per_shard;
+ map<int, rgw_mdlog_shard_data> *result;
+
+ map<int, string>::iterator iter;
+#define READ_MDLOG_MAX_CONCURRENT 10
+
+public:
+ RGWListRemoteMDLogCR(RGWMetaSyncEnv *_sync_env,
+ const std::string& period, map<int, string>& _shards,
+ int _max_entries_per_shard,
+ map<int, rgw_mdlog_shard_data> *_result) : RGWShardCollectCR(_sync_env->cct, READ_MDLOG_MAX_CONCURRENT),
+ sync_env(_sync_env), period(period),
+ max_entries_per_shard(_max_entries_per_shard),
+ result(_result) {
+ shards.swap(_shards);
+ iter = shards.begin();
+ }
+ bool spawn_next() override;
+};
+
+RGWRemoteMetaLog::~RGWRemoteMetaLog()
+{
+ delete error_logger;
+}
+
+int RGWRemoteMetaLog::read_log_info(rgw_mdlog_info *log_info)
+{
+ rgw_http_param_pair pairs[] = { { "type", "metadata" },
+ { NULL, NULL } };
+
+ int ret = conn->get_json_resource("/admin/log", pairs, *log_info);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to fetch mdlog info" << dendl;
+ return ret;
+ }
+
+ ldout(store->ctx(), 20) << "remote mdlog, num_shards=" << log_info->num_shards << dendl;
+
+ return 0;
+}
+
+int RGWRemoteMetaLog::read_master_log_shards_info(const string &master_period, map<int, RGWMetadataLogInfo> *shards_info)
+{
+ if (store->is_meta_master()) {
+ return 0;
+ }
+
+ rgw_mdlog_info log_info;
+ int ret = read_log_info(&log_info);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return run(new RGWReadRemoteMDLogInfoCR(&sync_env, master_period, log_info.num_shards, shards_info));
+}
+
+int RGWRemoteMetaLog::read_master_log_shards_next(const string& period, map<int, string> shard_markers, map<int, rgw_mdlog_shard_data> *result)
+{
+ if (store->is_meta_master()) {
+ return 0;
+ }
+
+ return run(new RGWListRemoteMDLogCR(&sync_env, period, shard_markers, 1, result));
+}
+
+int RGWRemoteMetaLog::init()
+{
+ conn = store->rest_master_conn;
+
+ int ret = http_manager.set_threaded();
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "failed in http_manager.set_threaded() ret=" << ret << dendl;
+ return ret;
+ }
+
+ error_logger = new RGWSyncErrorLogger(store, RGW_SYNC_ERROR_LOG_SHARD_PREFIX, ERROR_LOGGER_SHARDS);
+
+ init_sync_env(&sync_env);
+
+ return 0;
+}
+
+void RGWRemoteMetaLog::finish()
+{
+ going_down = true;
+ stop();
+}
+
+#define CLONE_MAX_ENTRIES 100
+
+int RGWMetaSyncStatusManager::init()
+{
+ if (store->is_meta_master()) {
+ return 0;
+ }
+
+ if (!store->rest_master_conn) {
+ lderr(store->ctx()) << "no REST connection to master zone" << dendl;
+ return -EIO;
+ }
+
+ int r = rgw_init_ioctx(store->get_rados_handle(), store->get_zone_params().log_pool, ioctx, true);
+ if (r < 0) {
+ lderr(store->ctx()) << "ERROR: failed to open log pool (" << store->get_zone_params().log_pool << " ret=" << r << dendl;
+ return r;
+ }
+
+ r = master_log.init();
+ if (r < 0) {
+ lderr(store->ctx()) << "ERROR: failed to init remote log, r=" << r << dendl;
+ return r;
+ }
+
+ RGWMetaSyncEnv& sync_env = master_log.get_sync_env();
+
+ rgw_meta_sync_status sync_status;
+ r = read_sync_status(&sync_status);
+ if (r < 0 && r != -ENOENT) {
+ lderr(store->ctx()) << "ERROR: failed to read sync status, r=" << r << dendl;
+ return r;
+ }
+
+ int num_shards = sync_status.sync_info.num_shards;
+
+ for (int i = 0; i < num_shards; i++) {
+ shard_objs[i] = rgw_raw_obj(store->get_zone_params().log_pool, sync_env.shard_obj_name(i));
+ }
+
+ RWLock::WLocker wl(ts_to_shard_lock);
+ for (int i = 0; i < num_shards; i++) {
+ clone_markers.push_back(string());
+ utime_shard ut;
+ ut.shard_id = i;
+ ts_to_shard[ut] = i;
+ }
+
+ return 0;
+}
+
+void RGWMetaSyncEnv::init(CephContext *_cct, RGWRados *_store, RGWRESTConn *_conn,
+ RGWAsyncRadosProcessor *_async_rados, RGWHTTPManager *_http_manager,
+ RGWSyncErrorLogger *_error_logger) {
+ cct = _cct;
+ store = _store;
+ conn = _conn;
+ async_rados = _async_rados;
+ http_manager = _http_manager;
+ error_logger = _error_logger;
+}
+
+string RGWMetaSyncEnv::status_oid()
+{
+ return mdlog_sync_status_oid;
+}
+
+string RGWMetaSyncEnv::shard_obj_name(int shard_id)
+{
+ char buf[mdlog_sync_status_shard_prefix.size() + 16];
+ snprintf(buf, sizeof(buf), "%s.%d", mdlog_sync_status_shard_prefix.c_str(), shard_id);
+
+ return string(buf);
+}
+
+class RGWAsyncReadMDLogEntries : public RGWAsyncRadosRequest {
+ RGWRados *store;
+ RGWMetadataLog *mdlog;
+ int shard_id;
+ string *marker;
+ int max_entries;
+ list<cls_log_entry> *entries;
+ bool *truncated;
+
+protected:
+ int _send_request() override {
+ real_time from_time;
+ real_time end_time;
+
+ void *handle;
+
+ mdlog->init_list_entries(shard_id, from_time, end_time, *marker, &handle);
+
+ int ret = mdlog->list_entries(handle, max_entries, *entries, marker, truncated);
+
+ mdlog->complete_list_entries(handle);
+
+ return ret;
+ }
+public:
+ RGWAsyncReadMDLogEntries(RGWCoroutine *caller, RGWAioCompletionNotifier *cn, RGWRados *_store,
+ RGWMetadataLog* mdlog, int _shard_id,
+ string* _marker, int _max_entries,
+ list<cls_log_entry> *_entries, bool *_truncated)
+ : RGWAsyncRadosRequest(caller, cn), store(_store), mdlog(mdlog),
+ shard_id(_shard_id), marker(_marker), max_entries(_max_entries),
+ entries(_entries), truncated(_truncated) {}
+};
+
+class RGWReadMDLogEntriesCR : public RGWSimpleCoroutine {
+ RGWMetaSyncEnv *sync_env;
+ RGWMetadataLog *const mdlog;
+ int shard_id;
+ string marker;
+ string *pmarker;
+ int max_entries;
+ list<cls_log_entry> *entries;
+ bool *truncated;
+
+ RGWAsyncReadMDLogEntries *req{nullptr};
+
+public:
+ RGWReadMDLogEntriesCR(RGWMetaSyncEnv *_sync_env, RGWMetadataLog* mdlog,
+ int _shard_id, string*_marker, int _max_entries,
+ list<cls_log_entry> *_entries, bool *_truncated)
+ : RGWSimpleCoroutine(_sync_env->cct), sync_env(_sync_env), mdlog(mdlog),
+ shard_id(_shard_id), pmarker(_marker), max_entries(_max_entries),
+ entries(_entries), truncated(_truncated) {}
+
+ ~RGWReadMDLogEntriesCR() override {
+ if (req) {
+ req->finish();
+ }
+ }
+
+ int send_request() override {
+ marker = *pmarker;
+ req = new RGWAsyncReadMDLogEntries(this, stack->create_completion_notifier(),
+ sync_env->store, mdlog, shard_id, &marker,
+ max_entries, entries, truncated);
+ sync_env->async_rados->queue(req);
+ return 0;
+ }
+
+ int request_complete() override {
+ int ret = req->get_ret_status();
+ if (ret >= 0 && !entries->empty()) {
+ *pmarker = marker;
+ }
+ return req->get_ret_status();
+ }
+};
+
+
+class RGWReadRemoteMDLogShardInfoCR : public RGWCoroutine {
+ RGWMetaSyncEnv *env;
+ RGWRESTReadResource *http_op;
+
+ const std::string& period;
+ int shard_id;
+ RGWMetadataLogInfo *shard_info;
+
+public:
+ RGWReadRemoteMDLogShardInfoCR(RGWMetaSyncEnv *env, const std::string& period,
+ int _shard_id, RGWMetadataLogInfo *_shard_info)
+ : RGWCoroutine(env->store->ctx()), env(env), http_op(NULL),
+ period(period), shard_id(_shard_id), shard_info(_shard_info) {}
+
+ int operate() override {
+ auto store = env->store;
+ RGWRESTConn *conn = store->rest_master_conn;
+ reenter(this) {
+ yield {
+ char buf[16];
+ snprintf(buf, sizeof(buf), "%d", shard_id);
+ rgw_http_param_pair pairs[] = { { "type" , "metadata" },
+ { "id", buf },
+ { "period", period.c_str() },
+ { "info" , NULL },
+ { NULL, NULL } };
+
+ string p = "/admin/log/";
+
+ http_op = new RGWRESTReadResource(conn, p, pairs, NULL,
+ env->http_manager);
+
+ http_op->set_user_info((void *)stack);
+
+ int ret = http_op->aio_read();
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to read from " << p << dendl;
+ log_error() << "failed to send http operation: " << http_op->to_str() << " ret=" << ret << std::endl;
+ http_op->put();
+ return set_cr_error(ret);
+ }
+
+ return io_block(0);
+ }
+ yield {
+ int ret = http_op->wait(shard_info);
+ http_op->put();
+ if (ret < 0) {
+ return set_cr_error(ret);
+ }
+ return set_cr_done();
+ }
+ }
+ return 0;
+ }
+};
+
+class RGWListRemoteMDLogShardCR : public RGWSimpleCoroutine {
+ RGWMetaSyncEnv *sync_env;
+ RGWRESTReadResource *http_op;
+
+ const std::string& period;
+ int shard_id;
+ string marker;
+ uint32_t max_entries;
+ rgw_mdlog_shard_data *result;
+
+public:
+ RGWListRemoteMDLogShardCR(RGWMetaSyncEnv *env, const std::string& period,
+ int _shard_id, const string& _marker, uint32_t _max_entries,
+ rgw_mdlog_shard_data *_result)
+ : RGWSimpleCoroutine(env->store->ctx()), sync_env(env), http_op(NULL),
+ period(period), shard_id(_shard_id), marker(_marker), max_entries(_max_entries), result(_result) {}
+
+ int send_request() override {
+ RGWRESTConn *conn = sync_env->conn;
+ RGWRados *store = sync_env->store;
+
+ char buf[32];
+ snprintf(buf, sizeof(buf), "%d", shard_id);
+
+ char max_entries_buf[32];
+ snprintf(max_entries_buf, sizeof(max_entries_buf), "%d", (int)max_entries);
+
+ const char *marker_key = (marker.empty() ? "" : "marker");
+
+ rgw_http_param_pair pairs[] = { { "type", "metadata" },
+ { "id", buf },
+ { "period", period.c_str() },
+ { "max-entries", max_entries_buf },
+ { marker_key, marker.c_str() },
+ { NULL, NULL } };
+
+ string p = "/admin/log/";
+
+ http_op = new RGWRESTReadResource(conn, p, pairs, NULL, sync_env->http_manager);
+ http_op->set_user_info((void *)stack);
+
+ int ret = http_op->aio_read();
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to read from " << p << dendl;
+ log_error() << "failed to send http operation: " << http_op->to_str() << " ret=" << ret << std::endl;
+ http_op->put();
+ return ret;
+ }
+
+ return 0;
+ }
+
+ int request_complete() override {
+ int ret = http_op->wait(result);
+ http_op->put();
+ if (ret < 0 && ret != -ENOENT) {
+ ldout(sync_env->store->ctx(), 0) << "ERROR: failed to list remote mdlog shard, ret=" << ret << dendl;
+ return ret;
+ }
+ return 0;
+ }
+};
+
+bool RGWReadRemoteMDLogInfoCR::spawn_next() {
+ if (shard_id >= num_shards) {
+ return false;
+ }
+ spawn(new RGWReadRemoteMDLogShardInfoCR(sync_env, period, shard_id, &(*mdlog_info)[shard_id]), false);
+ shard_id++;
+ return true;
+}
+
+bool RGWListRemoteMDLogCR::spawn_next() {
+ if (iter == shards.end()) {
+ return false;
+ }
+
+ spawn(new RGWListRemoteMDLogShardCR(sync_env, period, iter->first, iter->second, max_entries_per_shard, &(*result)[iter->first]), false);
+ ++iter;
+ return true;
+}
+
+class RGWInitSyncStatusCoroutine : public RGWCoroutine {
+ RGWMetaSyncEnv *sync_env;
+
+ rgw_meta_sync_info status;
+ vector<RGWMetadataLogInfo> shards_info;
+ boost::intrusive_ptr<RGWContinuousLeaseCR> lease_cr;
+ boost::intrusive_ptr<RGWCoroutinesStack> lease_stack;
+public:
+ RGWInitSyncStatusCoroutine(RGWMetaSyncEnv *_sync_env,
+ const rgw_meta_sync_info &status)
+ : RGWCoroutine(_sync_env->store->ctx()), sync_env(_sync_env),
+ status(status), shards_info(status.num_shards),
+ lease_cr(nullptr), lease_stack(nullptr) {}
+
+ ~RGWInitSyncStatusCoroutine() override {
+ if (lease_cr) {
+ lease_cr->abort();
+ }
+ }
+
+ int operate() override {
+ int ret;
+ reenter(this) {
+ yield {
+ set_status("acquiring sync lock");
+ uint32_t lock_duration = cct->_conf->rgw_sync_lease_period;
+ string lock_name = "sync_lock";
+ RGWRados *store = sync_env->store;
+ lease_cr.reset(new RGWContinuousLeaseCR(sync_env->async_rados, store,
+ rgw_raw_obj(store->get_zone_params().log_pool, sync_env->status_oid()),
+ lock_name, lock_duration, this));
+ lease_stack.reset(spawn(lease_cr.get(), false));
+ }
+ while (!lease_cr->is_locked()) {
+ if (lease_cr->is_done()) {
+ ldout(cct, 5) << "lease cr failed, done early " << dendl;
+ set_status("lease lock failed, early abort");
+ return set_cr_error(lease_cr->get_ret_status());
+ }
+ set_sleeping(true);
+ yield;
+ }
+ yield {
+ set_status("writing sync status");
+ RGWRados *store = sync_env->store;
+ call(new RGWSimpleRadosWriteCR<rgw_meta_sync_info>(sync_env->async_rados, store,
+ rgw_raw_obj(store->get_zone_params().log_pool, sync_env->status_oid()),
+ status));
+ }
+
+ if (retcode < 0) {
+ set_status("failed to write sync status");
+ ldout(cct, 0) << "ERROR: failed to write sync status, retcode=" << retcode << dendl;
+ yield lease_cr->go_down();
+ return set_cr_error(retcode);
+ }
+ /* fetch current position in logs */
+ set_status("fetching remote log position");
+ yield {
+ for (int i = 0; i < (int)status.num_shards; i++) {
+ spawn(new RGWReadRemoteMDLogShardInfoCR(sync_env, status.period, i,
+ &shards_info[i]), false);
+ }
+ }
+
+ drain_all_but_stack(lease_stack.get()); /* the lease cr still needs to run */
+
+ yield {
+ set_status("updating sync status");
+ for (int i = 0; i < (int)status.num_shards; i++) {
+ rgw_meta_sync_marker marker;
+ RGWMetadataLogInfo& info = shards_info[i];
+ marker.next_step_marker = info.marker;
+ marker.timestamp = info.last_update;
+ RGWRados *store = sync_env->store;
+ spawn(new RGWSimpleRadosWriteCR<rgw_meta_sync_marker>(sync_env->async_rados,
+ store,
+ rgw_raw_obj(store->get_zone_params().log_pool, sync_env->shard_obj_name(i)),
+ marker), true);
+ }
+ }
+ yield {
+ set_status("changing sync state: build full sync maps");
+ status.state = rgw_meta_sync_info::StateBuildingFullSyncMaps;
+ RGWRados *store = sync_env->store;
+ call(new RGWSimpleRadosWriteCR<rgw_meta_sync_info>(sync_env->async_rados, store,
+ rgw_raw_obj(store->get_zone_params().log_pool, sync_env->status_oid()),
+ status));
+ }
+ set_status("drop lock lease");
+ yield lease_cr->go_down();
+ while (collect(&ret, NULL)) {
+ if (ret < 0) {
+ return set_cr_error(ret);
+ }
+ yield;
+ }
+ drain_all();
+ return set_cr_done();
+ }
+ return 0;
+ }
+};
+
+class RGWReadSyncStatusMarkersCR : public RGWShardCollectCR {
+ static constexpr int MAX_CONCURRENT_SHARDS = 16;
+
+ RGWMetaSyncEnv *env;
+ const int num_shards;
+ int shard_id{0};
+ map<uint32_t, rgw_meta_sync_marker>& markers;
+
+ public:
+ RGWReadSyncStatusMarkersCR(RGWMetaSyncEnv *env, int num_shards,
+ map<uint32_t, rgw_meta_sync_marker>& markers)
+ : RGWShardCollectCR(env->cct, MAX_CONCURRENT_SHARDS),
+ env(env), num_shards(num_shards), markers(markers)
+ {}
+ bool spawn_next() override;
+};
+
+bool RGWReadSyncStatusMarkersCR::spawn_next()
+{
+ if (shard_id >= num_shards) {
+ return false;
+ }
+ using CR = RGWSimpleRadosReadCR<rgw_meta_sync_marker>;
+ rgw_raw_obj obj{env->store->get_zone_params().log_pool,
+ env->shard_obj_name(shard_id)};
+ spawn(new CR(env->async_rados, env->store, obj, &markers[shard_id]), false);
+ shard_id++;
+ return true;
+}
+
+class RGWReadSyncStatusCoroutine : public RGWCoroutine {
+ RGWMetaSyncEnv *sync_env;
+ rgw_meta_sync_status *sync_status;
+
+public:
+ RGWReadSyncStatusCoroutine(RGWMetaSyncEnv *_sync_env,
+ rgw_meta_sync_status *_status)
+ : RGWCoroutine(_sync_env->cct), sync_env(_sync_env), sync_status(_status)
+ {}
+ int operate() override;
+};
+
+int RGWReadSyncStatusCoroutine::operate()
+{
+ reenter(this) {
+ // read sync info
+ using ReadInfoCR = RGWSimpleRadosReadCR<rgw_meta_sync_info>;
+ yield {
+ bool empty_on_enoent = false; // fail on ENOENT
+ rgw_raw_obj obj{sync_env->store->get_zone_params().log_pool,
+ sync_env->status_oid()};
+ call(new ReadInfoCR(sync_env->async_rados, sync_env->store, obj,
+ &sync_status->sync_info, empty_on_enoent));
+ }
+ if (retcode < 0) {
+ ldout(sync_env->cct, 4) << "failed to read sync status info with "
+ << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+ // read shard markers
+ using ReadMarkersCR = RGWReadSyncStatusMarkersCR;
+ yield call(new ReadMarkersCR(sync_env, sync_status->sync_info.num_shards,
+ sync_status->sync_markers));
+ if (retcode < 0) {
+ ldout(sync_env->cct, 4) << "failed to read sync status markers with "
+ << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+ return set_cr_done();
+ }
+ return 0;
+}
+
+class RGWFetchAllMetaCR : public RGWCoroutine {
+ RGWMetaSyncEnv *sync_env;
+
+ int num_shards;
+
+
+ int ret_status;
+
+ list<string> sections;
+ list<string>::iterator sections_iter;
+
+ struct meta_list_result {
+ list<string> keys;
+ string marker;
+ uint64_t count{0};
+ bool truncated{false};
+
+ void decode_json(JSONObj *obj) {
+ JSONDecoder::decode_json("keys", keys, obj);
+ JSONDecoder::decode_json("marker", marker, obj);
+ JSONDecoder::decode_json("count", count, obj);
+ JSONDecoder::decode_json("truncated", truncated, obj);
+ }
+ } result;
+ list<string>::iterator iter;
+
+ std::unique_ptr<RGWShardedOmapCRManager> entries_index;
+
+ boost::intrusive_ptr<RGWContinuousLeaseCR> lease_cr;
+ boost::intrusive_ptr<RGWCoroutinesStack> lease_stack;
+ bool lost_lock;
+ bool failed;
+
+ string marker;
+
+ map<uint32_t, rgw_meta_sync_marker>& markers;
+
+public:
+ RGWFetchAllMetaCR(RGWMetaSyncEnv *_sync_env, int _num_shards,
+ map<uint32_t, rgw_meta_sync_marker>& _markers) : RGWCoroutine(_sync_env->cct), sync_env(_sync_env),
+ num_shards(_num_shards),
+ ret_status(0), lease_cr(nullptr), lease_stack(nullptr),
+ lost_lock(false), failed(false), markers(_markers) {
+ }
+
+ ~RGWFetchAllMetaCR() override {
+ }
+
+ void append_section_from_set(set<string>& all_sections, const string& name) {
+ set<string>::iterator iter = all_sections.find(name);
+ if (iter != all_sections.end()) {
+ sections.emplace_back(std::move(*iter));
+ all_sections.erase(iter);
+ }
+ }
+ /*
+ * meta sync should go in the following order: user, bucket.instance, bucket
+ * then whatever other sections exist (if any)
+ */
+ void rearrange_sections() {
+ set<string> all_sections;
+ std::move(sections.begin(), sections.end(),
+ std::inserter(all_sections, all_sections.end()));
+ sections.clear();
+
+ append_section_from_set(all_sections, "user");
+ append_section_from_set(all_sections, "bucket.instance");
+ append_section_from_set(all_sections, "bucket");
+
+ std::move(all_sections.begin(), all_sections.end(),
+ std::back_inserter(sections));
+ }
+
+ int operate() override {
+ RGWRESTConn *conn = sync_env->conn;
+
+ reenter(this) {
+ yield {
+ set_status(string("acquiring lock (") + sync_env->status_oid() + ")");
+ uint32_t lock_duration = cct->_conf->rgw_sync_lease_period;
+ string lock_name = "sync_lock";
+ lease_cr.reset(new RGWContinuousLeaseCR(sync_env->async_rados,
+ sync_env->store,
+ rgw_raw_obj(sync_env->store->get_zone_params().log_pool, sync_env->status_oid()),
+ lock_name, lock_duration, this));
+ lease_stack.reset(spawn(lease_cr.get(), false));
+ }
+ while (!lease_cr->is_locked()) {
+ if (lease_cr->is_done()) {
+ ldout(cct, 5) << "lease cr failed, done early " << dendl;
+ set_status("failed acquiring lock");
+ return set_cr_error(lease_cr->get_ret_status());
+ }
+ set_sleeping(true);
+ yield;
+ }
+ entries_index.reset(new RGWShardedOmapCRManager(sync_env->async_rados, sync_env->store, this, num_shards,
+ sync_env->store->get_zone_params().log_pool,
+ mdlog_sync_full_sync_index_prefix));
+ yield {
+ call(new RGWReadRESTResourceCR<list<string> >(cct, conn, sync_env->http_manager,
+ "/admin/metadata", NULL, §ions));
+ }
+ if (get_ret_status() < 0) {
+ ldout(cct, 0) << "ERROR: failed to fetch metadata sections" << dendl;
+ yield entries_index->finish();
+ yield lease_cr->go_down();
+ drain_all();
+ return set_cr_error(get_ret_status());
+ }
+ rearrange_sections();
+ sections_iter = sections.begin();
+ for (; sections_iter != sections.end(); ++sections_iter) {
+ do {
+ yield {
+#define META_FULL_SYNC_CHUNK_SIZE "1000"
+ string entrypoint = string("/admin/metadata/") + *sections_iter;
+ rgw_http_param_pair pairs[] = { { "max-entries", META_FULL_SYNC_CHUNK_SIZE },
+ { "marker", result.marker.c_str() },
+ { NULL, NULL } };
+ result.keys.clear();
+ call(new RGWReadRESTResourceCR<meta_list_result >(cct, conn, sync_env->http_manager,
+ entrypoint, pairs, &result));
+ }
+ if (get_ret_status() < 0) {
+ ldout(cct, 0) << "ERROR: failed to fetch metadata section: " << *sections_iter << dendl;
+ yield entries_index->finish();
+ yield lease_cr->go_down();
+ drain_all();
+ return set_cr_error(get_ret_status());
+ }
+ iter = result.keys.begin();
+ for (; iter != result.keys.end(); ++iter) {
+ if (!lease_cr->is_locked()) {
+ lost_lock = true;
+ break;
+ }
+ yield; // allow entries_index consumer to make progress
+
+ ldout(cct, 20) << "list metadata: section=" << *sections_iter << " key=" << *iter << dendl;
+ string s = *sections_iter + ":" + *iter;
+ int shard_id;
+ RGWRados *store = sync_env->store;
+ int ret = store->meta_mgr->get_log_shard_id(*sections_iter, *iter, &shard_id);
+ if (ret < 0) {
+ ldout(cct, 0) << "ERROR: could not determine shard id for " << *sections_iter << ":" << *iter << dendl;
+ ret_status = ret;
+ break;
+ }
+ if (!entries_index->append(s, shard_id)) {
+ break;
+ }
+ }
+ } while (result.truncated);
+ }
+ yield {
+ if (!entries_index->finish()) {
+ failed = true;
+ }
+ }
+ if (!failed) {
+ for (map<uint32_t, rgw_meta_sync_marker>::iterator iter = markers.begin(); iter != markers.end(); ++iter) {
+ int shard_id = (int)iter->first;
+ rgw_meta_sync_marker& marker = iter->second;
+ marker.total_entries = entries_index->get_total_entries(shard_id);
+ spawn(new RGWSimpleRadosWriteCR<rgw_meta_sync_marker>(sync_env->async_rados, sync_env->store,
+ rgw_raw_obj(sync_env->store->get_zone_params().log_pool, sync_env->shard_obj_name(shard_id)),
+ marker), true);
+ }
+ }
+
+ drain_all_but_stack(lease_stack.get()); /* the lease cr still needs to run */
+
+ yield lease_cr->go_down();
+
+ int ret;
+ while (collect(&ret, NULL)) {
+ if (ret < 0) {
+ return set_cr_error(ret);
+ }
+ yield;
+ }
+ drain_all();
+ if (failed) {
+ yield return set_cr_error(-EIO);
+ }
+ if (lost_lock) {
+ yield return set_cr_error(-EBUSY);
+ }
+
+ if (ret_status < 0) {
+ yield return set_cr_error(ret_status);
+ }
+
+ yield return set_cr_done();
+ }
+ return 0;
+ }
+};
+
+static string full_sync_index_shard_oid(int shard_id)
+{
+ char buf[mdlog_sync_full_sync_index_prefix.size() + 16];
+ snprintf(buf, sizeof(buf), "%s.%d", mdlog_sync_full_sync_index_prefix.c_str(), shard_id);
+ return string(buf);
+}
+
+class RGWReadRemoteMetadataCR : public RGWCoroutine {
+ RGWMetaSyncEnv *sync_env;
+
+ RGWRESTReadResource *http_op;
+
+ string section;
+ string key;
+
+ bufferlist *pbl;
+
+public:
+ RGWReadRemoteMetadataCR(RGWMetaSyncEnv *_sync_env,
+ const string& _section, const string& _key, bufferlist *_pbl) : RGWCoroutine(_sync_env->cct), sync_env(_sync_env),
+ http_op(NULL),
+ section(_section),
+ key(_key),
+ pbl(_pbl) {
+ }
+
+ int operate() override {
+ RGWRESTConn *conn = sync_env->conn;
+ reenter(this) {
+ yield {
+ rgw_http_param_pair pairs[] = { { "key" , key.c_str()},
+ { NULL, NULL } };
+
+ string p = string("/admin/metadata/") + section + "/" + key;
+
+ http_op = new RGWRESTReadResource(conn, p, pairs, NULL, sync_env->http_manager);
+
+ http_op->set_user_info((void *)stack);
+
+ int ret = http_op->aio_read();
+ if (ret < 0) {
+ ldout(sync_env->cct, 0) << "ERROR: failed to fetch mdlog data" << dendl;
+ log_error() << "failed to send http operation: " << http_op->to_str() << " ret=" << ret << std::endl;
+ http_op->put();
+ return set_cr_error(ret);
+ }
+
+ return io_block(0);
+ }
+ yield {
+ int ret = http_op->wait_bl(pbl);
+ http_op->put();
+ if (ret < 0) {
+ return set_cr_error(ret);
+ }
+ return set_cr_done();
+ }
+ }
+ return 0;
+ }
+};
+
+class RGWAsyncMetaStoreEntry : public RGWAsyncRadosRequest {
+ RGWRados *store;
+ string raw_key;
+ bufferlist bl;
+protected:
+ int _send_request() override {
+ int ret = store->meta_mgr->put(raw_key, bl, RGWMetadataHandler::APPLY_ALWAYS);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "ERROR: can't store key: " << raw_key << " ret=" << ret << dendl;
+ return ret;
+ }
+ return 0;
+ }
+public:
+ RGWAsyncMetaStoreEntry(RGWCoroutine *caller, RGWAioCompletionNotifier *cn, RGWRados *_store,
+ const string& _raw_key,
+ bufferlist& _bl) : RGWAsyncRadosRequest(caller, cn), store(_store),
+ raw_key(_raw_key), bl(_bl) {}
+};
+
+
+class RGWMetaStoreEntryCR : public RGWSimpleCoroutine {
+ RGWMetaSyncEnv *sync_env;
+ string raw_key;
+ bufferlist bl;
+
+ RGWAsyncMetaStoreEntry *req;
+
+public:
+ RGWMetaStoreEntryCR(RGWMetaSyncEnv *_sync_env,
+ const string& _raw_key,
+ bufferlist& _bl) : RGWSimpleCoroutine(_sync_env->cct), sync_env(_sync_env),
+ raw_key(_raw_key), bl(_bl), req(NULL) {
+ }
+
+ ~RGWMetaStoreEntryCR() override {
+ if (req) {
+ req->finish();
+ }
+ }
+
+ int send_request() override {
+ req = new RGWAsyncMetaStoreEntry(this, stack->create_completion_notifier(),
+ sync_env->store, raw_key, bl);
+ sync_env->async_rados->queue(req);
+ return 0;
+ }
+
+ int request_complete() override {
+ return req->get_ret_status();
+ }
+};
+
+class RGWAsyncMetaRemoveEntry : public RGWAsyncRadosRequest {
+ RGWRados *store;
+ string raw_key;
+protected:
+ int _send_request() override {
+ int ret = store->meta_mgr->remove(raw_key);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "ERROR: can't remove key: " << raw_key << " ret=" << ret << dendl;
+ return ret;
+ }
+ return 0;
+ }
+public:
+ RGWAsyncMetaRemoveEntry(RGWCoroutine *caller, RGWAioCompletionNotifier *cn, RGWRados *_store,
+ const string& _raw_key) : RGWAsyncRadosRequest(caller, cn), store(_store),
+ raw_key(_raw_key) {}
+};
+
+
+class RGWMetaRemoveEntryCR : public RGWSimpleCoroutine {
+ RGWMetaSyncEnv *sync_env;
+ string raw_key;
+
+ RGWAsyncMetaRemoveEntry *req;
+
+public:
+ RGWMetaRemoveEntryCR(RGWMetaSyncEnv *_sync_env,
+ const string& _raw_key) : RGWSimpleCoroutine(_sync_env->cct), sync_env(_sync_env),
+ raw_key(_raw_key), req(NULL) {
+ }
+
+ ~RGWMetaRemoveEntryCR() override {
+ if (req) {
+ req->finish();
+ }
+ }
+
+ int send_request() override {
+ req = new RGWAsyncMetaRemoveEntry(this, stack->create_completion_notifier(),
+ sync_env->store, raw_key);
+ sync_env->async_rados->queue(req);
+ return 0;
+ }
+
+ int request_complete() override {
+ int r = req->get_ret_status();
+ if (r == -ENOENT) {
+ r = 0;
+ }
+ return r;
+ }
+};
+
+#define META_SYNC_UPDATE_MARKER_WINDOW 10
+
+class RGWMetaSyncShardMarkerTrack : public RGWSyncShardMarkerTrack<string, string> {
+ RGWMetaSyncEnv *sync_env;
+
+ string marker_oid;
+ rgw_meta_sync_marker sync_marker;
+
+
+public:
+ RGWMetaSyncShardMarkerTrack(RGWMetaSyncEnv *_sync_env,
+ const string& _marker_oid,
+ const rgw_meta_sync_marker& _marker) : RGWSyncShardMarkerTrack(META_SYNC_UPDATE_MARKER_WINDOW),
+ sync_env(_sync_env),
+ marker_oid(_marker_oid),
+ sync_marker(_marker) {}
+
+ RGWCoroutine *store_marker(const string& new_marker, uint64_t index_pos, const real_time& timestamp) override {
+ sync_marker.marker = new_marker;
+ if (index_pos > 0) {
+ sync_marker.pos = index_pos;
+ }
+
+ if (!real_clock::is_zero(timestamp)) {
+ sync_marker.timestamp = timestamp;
+ }
+
+ ldout(sync_env->cct, 20) << __func__ << "(): updating marker marker_oid=" << marker_oid << " marker=" << new_marker << " realm_epoch=" << sync_marker.realm_epoch << dendl;
+ RGWRados *store = sync_env->store;
+ return new RGWSimpleRadosWriteCR<rgw_meta_sync_marker>(sync_env->async_rados,
+ store,
+ rgw_raw_obj(store->get_zone_params().log_pool, marker_oid),
+ sync_marker);
+ }
+};
+
+int RGWMetaSyncSingleEntryCR::operate() {
+ reenter(this) {
+#define NUM_TRANSIENT_ERROR_RETRIES 10
+
+ if (error_injection &&
+ rand() % 10000 < cct->_conf->rgw_sync_meta_inject_err_probability * 10000.0) {
+ ldout(sync_env->cct, 0) << __FILE__ << ":" << __LINE__ << ": injecting meta sync error on key=" << raw_key << dendl;
+ return set_cr_error(-EIO);
+ }
+
+ if (op_status != MDLOG_STATUS_COMPLETE) {
+ ldout(sync_env->cct, 20) << "skipping pending operation" << dendl;
+ yield call(marker_tracker->finish(entry_marker));
+ if (retcode < 0) {
+ return set_cr_error(retcode);
+ }
+ return set_cr_done();
+ }
+ for (tries = 0; tries < NUM_TRANSIENT_ERROR_RETRIES; tries++) {
+ yield {
+ pos = raw_key.find(':');
+ section = raw_key.substr(0, pos);
+ key = raw_key.substr(pos + 1);
+ ldout(sync_env->cct, 20) << "fetching remote metadata: " << section << ":" << key << (tries == 0 ? "" : " (retry)") << dendl;
+ call(new RGWReadRemoteMetadataCR(sync_env, section, key, &md_bl));
+ }
+
+ sync_status = retcode;
+
+ if (sync_status == -ENOENT) {
+ /* FIXME: do we need to remove the entry from the local zone? */
+ break;
+ }
+
+ if ((sync_status == -EAGAIN || sync_status == -ECANCELED) && (tries < NUM_TRANSIENT_ERROR_RETRIES - 1)) {
+ ldout(sync_env->cct, 20) << *this << ": failed to fetch remote metadata: " << section << ":" << key << ", will retry" << dendl;
+ continue;
+ }
+
+ if (sync_status < 0) {
+ ldout(sync_env->cct, 10) << *this << ": failed to send read remote metadata entry: section=" << section << " key=" << key << " status=" << sync_status << dendl;
+ log_error() << "failed to send read remote metadata entry: section=" << section << " key=" << key << " status=" << sync_status << std::endl;
+ yield call(sync_env->error_logger->log_error_cr(sync_env->conn->get_remote_id(), section, key, -sync_status,
+ string("failed to read remote metadata entry: ") + cpp_strerror(-sync_status)));
+ return set_cr_error(sync_status);
+ }
+
+ break;
+ }
+
+ retcode = 0;
+ for (tries = 0; tries < NUM_TRANSIENT_ERROR_RETRIES; tries++) {
+ if (sync_status != -ENOENT) {
+ yield call(new RGWMetaStoreEntryCR(sync_env, raw_key, md_bl));
+ } else {
+ yield call(new RGWMetaRemoveEntryCR(sync_env, raw_key));
+ }
+ if ((retcode == -EAGAIN || retcode == -ECANCELED) && (tries < NUM_TRANSIENT_ERROR_RETRIES - 1)) {
+ ldout(sync_env->cct, 20) << *this << ": failed to store metadata: " << section << ":" << key << ", got retcode=" << retcode << dendl;
+ continue;
+ }
+ break;
+ }
+
+ sync_status = retcode;
+
+ if (sync_status == 0 && marker_tracker) {
+ /* update marker */
+ yield call(marker_tracker->finish(entry_marker));
+ sync_status = retcode;
+ }
+ if (sync_status < 0) {
+ return set_cr_error(sync_status);
+ }
+ return set_cr_done();
+ }
+ return 0;
+}
+
+class RGWCloneMetaLogCoroutine : public RGWCoroutine {
+ RGWMetaSyncEnv *sync_env;
+ RGWMetadataLog *mdlog;
+
+ const std::string& period;
+ int shard_id;
+ string marker;
+ bool truncated = false;
+ string *new_marker;
+
+ int max_entries = CLONE_MAX_ENTRIES;
+
+ RGWRESTReadResource *http_op = nullptr;
+ boost::intrusive_ptr<RGWMetadataLogInfoCompletion> completion;
+
+ RGWMetadataLogInfo shard_info;
+ rgw_mdlog_shard_data data;
+
+public:
+ RGWCloneMetaLogCoroutine(RGWMetaSyncEnv *_sync_env, RGWMetadataLog* mdlog,
+ const std::string& period, int _id,
+ const string& _marker, string *_new_marker)
+ : RGWCoroutine(_sync_env->cct), sync_env(_sync_env), mdlog(mdlog),
+ period(period), shard_id(_id), marker(_marker), new_marker(_new_marker) {
+ if (new_marker) {
+ *new_marker = marker;
+ }
+ }
+ ~RGWCloneMetaLogCoroutine() override {
+ if (http_op) {
+ http_op->put();
+ }
+ if (completion) {
+ completion->cancel();
+ }
+ }
+
+ int operate() override;
+
+ int state_init();
+ int state_read_shard_status();
+ int state_read_shard_status_complete();
+ int state_send_rest_request();
+ int state_receive_rest_response();
+ int state_store_mdlog_entries();
+ int state_store_mdlog_entries_complete();
+};
+
+class RGWMetaSyncShardCR : public RGWCoroutine {
+ RGWMetaSyncEnv *sync_env;
+
+ const rgw_pool& pool;
+ const std::string& period; //< currently syncing period id
+ const epoch_t realm_epoch; //< realm_epoch of period
+ RGWMetadataLog* mdlog; //< log of syncing period
+ uint32_t shard_id;
+ rgw_meta_sync_marker& sync_marker;
+ boost::optional<rgw_meta_sync_marker> temp_marker; //< for pending updates
+ string marker;
+ string max_marker;
+ const std::string& period_marker; //< max marker stored in next period
+
+ map<string, bufferlist> entries;
+ map<string, bufferlist>::iterator iter;
+
+ string oid;
+
+ RGWMetaSyncShardMarkerTrack *marker_tracker = nullptr;
+
+ list<cls_log_entry> log_entries;
+ list<cls_log_entry>::iterator log_iter;
+ bool truncated = false;
+
+ string mdlog_marker;
+ string raw_key;
+ rgw_mdlog_entry mdlog_entry;
+
+ Mutex inc_lock;
+ Cond inc_cond;
+
+ boost::asio::coroutine incremental_cr;
+ boost::asio::coroutine full_cr;
+
+ boost::intrusive_ptr<RGWContinuousLeaseCR> lease_cr;
+ boost::intrusive_ptr<RGWCoroutinesStack> lease_stack;
+
+ bool lost_lock = false;
+
+ bool *reset_backoff;
+
+ // hold a reference to the cr stack while it's in the map
+ using StackRef = boost::intrusive_ptr<RGWCoroutinesStack>;
+ map<StackRef, string> stack_to_pos;
+ map<string, string> pos_to_prev;
+
+ bool can_adjust_marker = false;
+ bool done_with_period = false;
+
+ int total_entries = 0;
+
+public:
+ RGWMetaSyncShardCR(RGWMetaSyncEnv *_sync_env, const rgw_pool& _pool,
+ const std::string& period, epoch_t realm_epoch,
+ RGWMetadataLog* mdlog, uint32_t _shard_id,
+ rgw_meta_sync_marker& _marker,
+ const std::string& period_marker, bool *_reset_backoff)
+ : RGWCoroutine(_sync_env->cct), sync_env(_sync_env), pool(_pool),
+ period(period), realm_epoch(realm_epoch), mdlog(mdlog),
+ shard_id(_shard_id), sync_marker(_marker),
+ period_marker(period_marker), inc_lock("RGWMetaSyncShardCR::inc_lock"),
+ reset_backoff(_reset_backoff) {
+ *reset_backoff = false;
+ }
+
+ ~RGWMetaSyncShardCR() override {
+ delete marker_tracker;
+ if (lease_cr) {
+ lease_cr->abort();
+ }
+ }
+
+ void set_marker_tracker(RGWMetaSyncShardMarkerTrack *mt) {
+ delete marker_tracker;
+ marker_tracker = mt;
+ }
+
+ int operate() override {
+ int r;
+ while (true) {
+ switch (sync_marker.state) {
+ case rgw_meta_sync_marker::FullSync:
+ r = full_sync();
+ if (r < 0) {
+ ldout(sync_env->cct, 10) << "sync: full_sync: shard_id=" << shard_id << " r=" << r << dendl;
+ return set_cr_error(r);
+ }
+ return 0;
+ case rgw_meta_sync_marker::IncrementalSync:
+ r = incremental_sync();
+ if (r < 0) {
+ ldout(sync_env->cct, 10) << "sync: incremental_sync: shard_id=" << shard_id << " r=" << r << dendl;
+ return set_cr_error(r);
+ }
+ return 0;
+ }
+ }
+ /* unreachable */
+ return 0;
+ }
+
+ void collect_children()
+ {
+ int child_ret;
+ RGWCoroutinesStack *child;
+ while (collect_next(&child_ret, &child)) {
+ auto iter = stack_to_pos.find(child);
+ if (iter == stack_to_pos.end()) {
+ /* some other stack that we don't care about */
+ continue;
+ }
+
+ string& pos = iter->second;
+
+ if (child_ret < 0) {
+ ldout(sync_env->cct, 0) << *this << ": child operation stack=" << child << " entry=" << pos << " returned " << child_ret << dendl;
+ }
+
+ map<string, string>::iterator prev_iter = pos_to_prev.find(pos);
+ assert(prev_iter != pos_to_prev.end());
+
+ /*
+ * we should get -EAGAIN for transient errors, for which we want to retry, so we don't
+ * update the marker and abort. We'll get called again for these. Permanent errors will be
+ * handled by marking the entry at the error log shard, so that we retry on it separately
+ */
+ if (child_ret == -EAGAIN) {
+ can_adjust_marker = false;
+ }
+
+ if (pos_to_prev.size() == 1) {
+ if (can_adjust_marker) {
+ sync_marker.marker = pos;
+ }
+ pos_to_prev.erase(prev_iter);
+ } else {
+ assert(pos_to_prev.size() > 1);
+ pos_to_prev.erase(prev_iter);
+ prev_iter = pos_to_prev.begin();
+ if (can_adjust_marker) {
+ sync_marker.marker = prev_iter->second;
+ }
+ }
+
+ ldout(sync_env->cct, 4) << *this << ": adjusting marker pos=" << sync_marker.marker << dendl;
+ stack_to_pos.erase(iter);
+ }
+ }
+
+ int full_sync() {
+#define OMAP_GET_MAX_ENTRIES 100
+ int max_entries = OMAP_GET_MAX_ENTRIES;
+ reenter(&full_cr) {
+ set_status("full_sync");
+ oid = full_sync_index_shard_oid(shard_id);
+ can_adjust_marker = true;
+ /* grab lock */
+ yield {
+ uint32_t lock_duration = cct->_conf->rgw_sync_lease_period;
+ string lock_name = "sync_lock";
+ RGWRados *store = sync_env->store;
+ lease_cr.reset(new RGWContinuousLeaseCR(sync_env->async_rados, store,
+ rgw_raw_obj(pool, sync_env->shard_obj_name(shard_id)),
+ lock_name, lock_duration, this));
+ lease_stack.reset(spawn(lease_cr.get(), false));
+ lost_lock = false;
+ }
+ while (!lease_cr->is_locked()) {
+ if (lease_cr->is_done()) {
+ ldout(cct, 5) << "lease cr failed, done early " << dendl;
+ drain_all();
+ return lease_cr->get_ret_status();
+ }
+ set_sleeping(true);
+ yield;
+ }
+
+ /* lock succeeded, a retry now should avoid previous backoff status */
+ *reset_backoff = true;
+
+ /* prepare marker tracker */
+ set_marker_tracker(new RGWMetaSyncShardMarkerTrack(sync_env,
+ sync_env->shard_obj_name(shard_id),
+ sync_marker));
+
+ marker = sync_marker.marker;
+
+ total_entries = sync_marker.pos;
+
+ /* sync! */
+ do {
+ if (!lease_cr->is_locked()) {
+ lost_lock = true;
+ break;
+ }
+ yield call(new RGWRadosGetOmapKeysCR(sync_env->store, rgw_raw_obj(pool, oid),
+ marker, &entries, max_entries));
+ if (retcode < 0) {
+ ldout(sync_env->cct, 0) << "ERROR: " << __func__ << "(): RGWRadosGetOmapKeysCR() returned ret=" << retcode << dendl;
+ yield lease_cr->go_down();
+ drain_all();
+ return retcode;
+ }
+ iter = entries.begin();
+ for (; iter != entries.end(); ++iter) {
+ ldout(sync_env->cct, 20) << __func__ << ": full sync: " << iter->first << dendl;
+ total_entries++;
+ if (!marker_tracker->start(iter->first, total_entries, real_time())) {
+ ldout(sync_env->cct, 0) << "ERROR: cannot start syncing " << iter->first << ". Duplicate entry?" << dendl;
+ } else {
+ // fetch remote and write locally
+ yield {
+ RGWCoroutinesStack *stack = spawn(new RGWMetaSyncSingleEntryCR(sync_env, iter->first, iter->first, MDLOG_STATUS_COMPLETE, marker_tracker), false);
+ // stack_to_pos holds a reference to the stack
+ stack_to_pos[stack] = iter->first;
+ pos_to_prev[iter->first] = marker;
+ }
+ }
+ marker = iter->first;
+ }
+ collect_children();
+ } while ((int)entries.size() == max_entries && can_adjust_marker);
+
+ while (num_spawned() > 1) {
+ yield wait_for_child();
+ collect_children();
+ }
+
+ if (!lost_lock) {
+ /* update marker to reflect we're done with full sync */
+ if (can_adjust_marker) {
+ // apply updates to a temporary marker, or operate() will send us
+ // to incremental_sync() after we yield
+ temp_marker = sync_marker;
+ temp_marker->state = rgw_meta_sync_marker::IncrementalSync;
+ temp_marker->marker = std::move(temp_marker->next_step_marker);
+ temp_marker->next_step_marker.clear();
+ temp_marker->realm_epoch = realm_epoch;
+ ldout(sync_env->cct, 4) << *this << ": saving marker pos=" << temp_marker->marker << " realm_epoch=" << realm_epoch << dendl;
+
+ using WriteMarkerCR = RGWSimpleRadosWriteCR<rgw_meta_sync_marker>;
+ yield call(new WriteMarkerCR(sync_env->async_rados, sync_env->store,
+ rgw_raw_obj(pool, sync_env->shard_obj_name(shard_id)),
+ *temp_marker));
+ }
+
+ if (retcode < 0) {
+ ldout(sync_env->cct, 0) << "ERROR: failed to set sync marker: retcode=" << retcode << dendl;
+ yield lease_cr->go_down();
+ drain_all();
+ return retcode;
+ }
+ }
+
+ /*
+ * if we reached here, it means that lost_lock is true, otherwise the state
+ * change in the previous block will prevent us from reaching here
+ */
+
+ yield lease_cr->go_down();
+
+ lease_cr.reset();
+
+ drain_all();
+
+ if (!can_adjust_marker) {
+ return -EAGAIN;
+ }
+
+ if (lost_lock) {
+ return -EBUSY;
+ }
+
+ // apply the sync marker update
+ assert(temp_marker);
+ sync_marker = std::move(*temp_marker);
+ temp_marker = boost::none;
+ // must not yield after this point!
+ }
+ return 0;
+ }
+
+
+ int incremental_sync() {
+ reenter(&incremental_cr) {
+ set_status("incremental_sync");
+ can_adjust_marker = true;
+ /* grab lock */
+ if (!lease_cr) { /* could have had a lease_cr lock from previous state */
+ yield {
+ uint32_t lock_duration = cct->_conf->rgw_sync_lease_period;
+ string lock_name = "sync_lock";
+ RGWRados *store = sync_env->store;
+ lease_cr.reset( new RGWContinuousLeaseCR(sync_env->async_rados, store,
+ rgw_raw_obj(pool, sync_env->shard_obj_name(shard_id)),
+ lock_name, lock_duration, this));
+ lease_stack.reset(spawn(lease_cr.get(), false));
+ lost_lock = false;
+ }
+ while (!lease_cr->is_locked()) {
+ if (lease_cr->is_done()) {
+ ldout(cct, 5) << "lease cr failed, done early " << dendl;
+ drain_all();
+ return lease_cr->get_ret_status();
+ }
+ set_sleeping(true);
+ yield;
+ }
+ }
+ // if the period has advanced, we can't use the existing marker
+ if (sync_marker.realm_epoch < realm_epoch) {
+ ldout(sync_env->cct, 4) << "clearing marker=" << sync_marker.marker
+ << " from old realm_epoch=" << sync_marker.realm_epoch
+ << " (now " << realm_epoch << ')' << dendl;
+ sync_marker.realm_epoch = realm_epoch;
+ sync_marker.marker.clear();
+ }
+ mdlog_marker = sync_marker.marker;
+ set_marker_tracker(new RGWMetaSyncShardMarkerTrack(sync_env,
+ sync_env->shard_obj_name(shard_id),
+ sync_marker));
+
+ /*
+ * mdlog_marker: the remote sync marker positiion
+ * sync_marker: the local sync marker position
+ * max_marker: the max mdlog position that we fetched
+ * marker: the current position we try to sync
+ * period_marker: the last marker before the next period begins (optional)
+ */
+ marker = max_marker = sync_marker.marker;
+ /* inc sync */
+ do {
+ if (!lease_cr->is_locked()) {
+ lost_lock = true;
+ break;
+ }
+#define INCREMENTAL_MAX_ENTRIES 100
+ ldout(sync_env->cct, 20) << __func__ << ":" << __LINE__ << ": shard_id=" << shard_id << " mdlog_marker=" << mdlog_marker << " sync_marker.marker=" << sync_marker.marker << " period_marker=" << period_marker << dendl;
+ if (!period_marker.empty() && period_marker <= mdlog_marker) {
+ ldout(cct, 10) << "mdlog_marker past period_marker=" << period_marker << dendl;
+ done_with_period = true;
+ break;
+ }
+ if (mdlog_marker <= max_marker) {
+ /* we're at the tip, try to bring more entries */
+ ldout(sync_env->cct, 20) << __func__ << ":" << __LINE__ << ": shard_id=" << shard_id << " syncing mdlog for shard_id=" << shard_id << dendl;
+ yield call(new RGWCloneMetaLogCoroutine(sync_env, mdlog,
+ period, shard_id,
+ mdlog_marker, &mdlog_marker));
+ }
+ if (retcode < 0) {
+ ldout(sync_env->cct, 10) << *this << ": failed to fetch more log entries, retcode=" << retcode << dendl;
+ yield lease_cr->go_down();
+ drain_all();
+ *reset_backoff = false; // back off and try again later
+ return retcode;
+ }
+ *reset_backoff = true; /* if we got to this point, all systems function */
+ ldout(sync_env->cct, 20) << __func__ << ":" << __LINE__ << ": shard_id=" << shard_id << " mdlog_marker=" << mdlog_marker << " sync_marker.marker=" << sync_marker.marker << dendl;
+ if (mdlog_marker > max_marker) {
+ marker = max_marker;
+ yield call(new RGWReadMDLogEntriesCR(sync_env, mdlog, shard_id,
+ &max_marker, INCREMENTAL_MAX_ENTRIES,
+ &log_entries, &truncated));
+ if (retcode < 0) {
+ ldout(sync_env->cct, 10) << *this << ": failed to list mdlog entries, retcode=" << retcode << dendl;
+ yield lease_cr->go_down();
+ drain_all();
+ *reset_backoff = false; // back off and try again later
+ return retcode;
+ }
+ for (log_iter = log_entries.begin(); log_iter != log_entries.end() && !done_with_period; ++log_iter) {
+ if (!period_marker.empty() && period_marker <= log_iter->id) {
+ done_with_period = true;
+ if (period_marker < log_iter->id) {
+ ldout(cct, 10) << "found key=" << log_iter->id
+ << " past period_marker=" << period_marker << dendl;
+ break;
+ }
+ ldout(cct, 10) << "found key at period_marker=" << period_marker << dendl;
+ // sync this entry, then return control to RGWMetaSyncCR
+ }
+ if (!mdlog_entry.convert_from(*log_iter)) {
+ ldout(sync_env->cct, 0) << __func__ << ":" << __LINE__ << ": ERROR: failed to convert mdlog entry, shard_id=" << shard_id << " log_entry: " << log_iter->id << ":" << log_iter->section << ":" << log_iter->name << ":" << log_iter->timestamp << " ... skipping entry" << dendl;
+ continue;
+ }
+ ldout(sync_env->cct, 20) << __func__ << ":" << __LINE__ << ": shard_id=" << shard_id << " log_entry: " << log_iter->id << ":" << log_iter->section << ":" << log_iter->name << ":" << log_iter->timestamp << dendl;
+ if (!marker_tracker->start(log_iter->id, 0, log_iter->timestamp.to_real_time())) {
+ ldout(sync_env->cct, 0) << "ERROR: cannot start syncing " << log_iter->id << ". Duplicate entry?" << dendl;
+ } else {
+ raw_key = log_iter->section + ":" + log_iter->name;
+ yield {
+ RGWCoroutinesStack *stack = spawn(new RGWMetaSyncSingleEntryCR(sync_env, raw_key, log_iter->id, mdlog_entry.log_data.status, marker_tracker), false);
+ assert(stack);
+ // stack_to_pos holds a reference to the stack
+ stack_to_pos[stack] = log_iter->id;
+ pos_to_prev[log_iter->id] = marker;
+ }
+ }
+ marker = log_iter->id;
+ }
+ }
+ collect_children();
+ ldout(sync_env->cct, 20) << __func__ << ":" << __LINE__ << ": shard_id=" << shard_id << " mdlog_marker=" << mdlog_marker << " max_marker=" << max_marker << " sync_marker.marker=" << sync_marker.marker << " period_marker=" << period_marker << dendl;
+ if (done_with_period) {
+ // return control to RGWMetaSyncCR and advance to the next period
+ ldout(sync_env->cct, 10) << *this << ": done with period" << dendl;
+ break;
+ }
+ if (mdlog_marker == max_marker && can_adjust_marker) {
+#define INCREMENTAL_INTERVAL 20
+ yield wait(utime_t(INCREMENTAL_INTERVAL, 0));
+ }
+ } while (can_adjust_marker);
+
+ while (num_spawned() > 1) {
+ yield wait_for_child();
+ collect_children();
+ }
+
+ yield lease_cr->go_down();
+
+ drain_all();
+
+ if (lost_lock) {
+ return -EBUSY;
+ }
+
+ if (!can_adjust_marker) {
+ return -EAGAIN;
+ }
+
+ return set_cr_done();
+ }
+ /* TODO */
+ return 0;
+ }
+};
+
+class RGWMetaSyncShardControlCR : public RGWBackoffControlCR
+{
+ RGWMetaSyncEnv *sync_env;
+
+ const rgw_pool& pool;
+ const std::string& period;
+ epoch_t realm_epoch;
+ RGWMetadataLog* mdlog;
+ uint32_t shard_id;
+ rgw_meta_sync_marker sync_marker;
+ const std::string period_marker;
+
+ static constexpr bool exit_on_error = false; // retry on all errors
+public:
+ RGWMetaSyncShardControlCR(RGWMetaSyncEnv *_sync_env, const rgw_pool& _pool,
+ const std::string& period, epoch_t realm_epoch,
+ RGWMetadataLog* mdlog, uint32_t _shard_id,
+ const rgw_meta_sync_marker& _marker,
+ std::string&& period_marker)
+ : RGWBackoffControlCR(_sync_env->cct, exit_on_error), sync_env(_sync_env),
+ pool(_pool), period(period), realm_epoch(realm_epoch), mdlog(mdlog),
+ shard_id(_shard_id), sync_marker(_marker),
+ period_marker(std::move(period_marker)) {}
+
+ RGWCoroutine *alloc_cr() override {
+ return new RGWMetaSyncShardCR(sync_env, pool, period, realm_epoch, mdlog,
+ shard_id, sync_marker, period_marker, backoff_ptr());
+ }
+
+ RGWCoroutine *alloc_finisher_cr() override {
+ RGWRados *store = sync_env->store;
+ return new RGWSimpleRadosReadCR<rgw_meta_sync_marker>(sync_env->async_rados, store,
+ rgw_raw_obj(pool, sync_env->shard_obj_name(shard_id)),
+ &sync_marker);
+ }
+};
+
+class RGWMetaSyncCR : public RGWCoroutine {
+ RGWMetaSyncEnv *sync_env;
+ const rgw_pool& pool;
+ RGWPeriodHistory::Cursor cursor; //< sync position in period history
+ RGWPeriodHistory::Cursor next; //< next period in history
+ rgw_meta_sync_status sync_status;
+
+ std::mutex mutex; //< protect access to shard_crs
+
+ // TODO: it should be enough to hold a reference on the stack only, as calling
+ // RGWCoroutinesStack::wakeup() doesn't refer to the RGWCoroutine if it has
+ // already completed
+ using ControlCRRef = boost::intrusive_ptr<RGWMetaSyncShardControlCR>;
+ using StackRef = boost::intrusive_ptr<RGWCoroutinesStack>;
+ using RefPair = std::pair<ControlCRRef, StackRef>;
+ map<int, RefPair> shard_crs;
+ int ret{0};
+
+public:
+ RGWMetaSyncCR(RGWMetaSyncEnv *_sync_env, RGWPeriodHistory::Cursor cursor,
+ const rgw_meta_sync_status& _sync_status)
+ : RGWCoroutine(_sync_env->cct), sync_env(_sync_env),
+ pool(sync_env->store->get_zone_params().log_pool),
+ cursor(cursor), sync_status(_sync_status) {}
+
+ int operate() override {
+ reenter(this) {
+ // loop through one period at a time
+ for (;;) {
+ if (cursor == sync_env->store->period_history->get_current()) {
+ next = RGWPeriodHistory::Cursor{};
+ if (cursor) {
+ ldout(cct, 10) << "RGWMetaSyncCR on current period="
+ << cursor.get_period().get_id() << dendl;
+ } else {
+ ldout(cct, 10) << "RGWMetaSyncCR with no period" << dendl;
+ }
+ } else {
+ next = cursor;
+ next.next();
+ ldout(cct, 10) << "RGWMetaSyncCR on period="
+ << cursor.get_period().get_id() << ", next="
+ << next.get_period().get_id() << dendl;
+ }
+
+ yield {
+ // get the mdlog for the current period (may be empty)
+ auto& period_id = sync_status.sync_info.period;
+ auto realm_epoch = sync_status.sync_info.realm_epoch;
+ auto mdlog = sync_env->store->meta_mgr->get_log(period_id);
+
+ // prevent wakeup() from accessing shard_crs while we're spawning them
+ std::lock_guard<std::mutex> lock(mutex);
+
+ // sync this period on each shard
+ for (const auto& m : sync_status.sync_markers) {
+ uint32_t shard_id = m.first;
+ auto& marker = m.second;
+
+ std::string period_marker;
+ if (next) {
+ // read the maximum marker from the next period's sync status
+ period_marker = next.get_period().get_sync_status()[shard_id];
+ if (period_marker.empty()) {
+ // no metadata changes have occurred on this shard, skip it
+ ldout(cct, 10) << "RGWMetaSyncCR: skipping shard " << shard_id
+ << " with empty period marker" << dendl;
+ continue;
+ }
+ }
+
+ using ShardCR = RGWMetaSyncShardControlCR;
+ auto cr = new ShardCR(sync_env, pool, period_id, realm_epoch,
+ mdlog, shard_id, marker,
+ std::move(period_marker));
+ auto stack = spawn(cr, false);
+ shard_crs[shard_id] = RefPair{cr, stack};
+ }
+ }
+ // wait for each shard to complete
+ while (ret == 0 && num_spawned() > 0) {
+ yield wait_for_child();
+ collect(&ret, nullptr);
+ }
+ drain_all();
+ {
+ // drop shard cr refs under lock
+ std::lock_guard<std::mutex> lock(mutex);
+ shard_crs.clear();
+ }
+ if (ret < 0) {
+ return set_cr_error(ret);
+ }
+ // advance to the next period
+ assert(next);
+ cursor = next;
+
+ // write the updated sync info
+ sync_status.sync_info.period = cursor.get_period().get_id();
+ sync_status.sync_info.realm_epoch = cursor.get_epoch();
+ yield call(new RGWSimpleRadosWriteCR<rgw_meta_sync_info>(sync_env->async_rados,
+ sync_env->store,
+ rgw_raw_obj(pool, sync_env->status_oid()),
+ sync_status.sync_info));
+ }
+ }
+ return 0;
+ }
+
+ void wakeup(int shard_id) {
+ std::lock_guard<std::mutex> lock(mutex);
+ auto iter = shard_crs.find(shard_id);
+ if (iter == shard_crs.end()) {
+ return;
+ }
+ iter->second.first->wakeup();
+ }
+};
+
+void RGWRemoteMetaLog::init_sync_env(RGWMetaSyncEnv *env) {
+ env->cct = store->ctx();
+ env->store = store;
+ env->conn = conn;
+ env->async_rados = async_rados;
+ env->http_manager = &http_manager;
+ env->error_logger = error_logger;
+}
+
+int RGWRemoteMetaLog::read_sync_status(rgw_meta_sync_status *sync_status)
+{
+ if (store->is_meta_master()) {
+ return 0;
+ }
+ // cannot run concurrently with run_sync(), so run in a separate manager
+ RGWCoroutinesManager crs(store->ctx(), store->get_cr_registry());
+ RGWHTTPManager http_manager(store->ctx(), crs.get_completion_mgr());
+ int ret = http_manager.set_threaded();
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "failed in http_manager.set_threaded() ret=" << ret << dendl;
+ return ret;
+ }
+ RGWMetaSyncEnv sync_env_local = sync_env;
+ sync_env_local.http_manager = &http_manager;
+ ret = crs.run(new RGWReadSyncStatusCoroutine(&sync_env_local, sync_status));
+ http_manager.stop();
+ return ret;
+}
+
+int RGWRemoteMetaLog::init_sync_status()
+{
+ if (store->is_meta_master()) {
+ return 0;
+ }
+
+ rgw_mdlog_info mdlog_info;
+ int r = read_log_info(&mdlog_info);
+ if (r < 0) {
+ lderr(store->ctx()) << "ERROR: fail to fetch master log info (r=" << r << ")" << dendl;
+ return r;
+ }
+
+ rgw_meta_sync_info sync_info;
+ sync_info.num_shards = mdlog_info.num_shards;
+ auto cursor = store->period_history->get_current();
+ if (cursor) {
+ sync_info.period = cursor.get_period().get_id();
+ sync_info.realm_epoch = cursor.get_epoch();
+ }
+
+ return run(new RGWInitSyncStatusCoroutine(&sync_env, sync_info));
+}
+
+int RGWRemoteMetaLog::store_sync_info(const rgw_meta_sync_info& sync_info)
+{
+ return run(new RGWSimpleRadosWriteCR<rgw_meta_sync_info>(async_rados, store,
+ rgw_raw_obj(store->get_zone_params().log_pool, sync_env.status_oid()),
+ sync_info));
+}
+
+// return a cursor to the period at our sync position
+static RGWPeriodHistory::Cursor get_period_at(RGWRados* store,
+ const rgw_meta_sync_info& info)
+{
+ if (info.period.empty()) {
+ // return an empty cursor with error=0
+ return RGWPeriodHistory::Cursor{};
+ }
+
+ // look for an existing period in our history
+ auto cursor = store->period_history->lookup(info.realm_epoch);
+ if (cursor) {
+ // verify that the period ids match
+ auto& existing = cursor.get_period().get_id();
+ if (existing != info.period) {
+ lderr(store->ctx()) << "ERROR: sync status period=" << info.period
+ << " does not match period=" << existing
+ << " in history at realm epoch=" << info.realm_epoch << dendl;
+ return RGWPeriodHistory::Cursor{-EEXIST};
+ }
+ return cursor;
+ }
+
+ // read the period from rados or pull it from the master
+ RGWPeriod period;
+ int r = store->period_puller->pull(info.period, period);
+ if (r < 0) {
+ lderr(store->ctx()) << "ERROR: failed to read period id "
+ << info.period << ": " << cpp_strerror(r) << dendl;
+ return RGWPeriodHistory::Cursor{r};
+ }
+ // attach the period to our history
+ cursor = store->period_history->attach(std::move(period));
+ if (!cursor) {
+ r = cursor.get_error();
+ lderr(store->ctx()) << "ERROR: failed to read period history back to "
+ << info.period << ": " << cpp_strerror(r) << dendl;
+ }
+ return cursor;
+}
+
+int RGWRemoteMetaLog::run_sync()
+{
+ if (store->is_meta_master()) {
+ return 0;
+ }
+
+ int r = 0;
+
+ // get shard count and oldest log period from master
+ rgw_mdlog_info mdlog_info;
+ for (;;) {
+ if (going_down) {
+ ldout(store->ctx(), 1) << __func__ << "(): going down" << dendl;
+ return 0;
+ }
+ r = read_log_info(&mdlog_info);
+ if (r == -EIO || r == -ENOENT) {
+ // keep retrying if master isn't alive or hasn't initialized the log
+ ldout(store->ctx(), 10) << __func__ << "(): waiting for master.." << dendl;
+ backoff.backoff_sleep();
+ continue;
+ }
+ backoff.reset();
+ if (r < 0) {
+ lderr(store->ctx()) << "ERROR: fail to fetch master log info (r=" << r << ")" << dendl;
+ return r;
+ }
+ break;
+ }
+
+ rgw_meta_sync_status sync_status;
+ do {
+ if (going_down) {
+ ldout(store->ctx(), 1) << __func__ << "(): going down" << dendl;
+ return 0;
+ }
+ r = run(new RGWReadSyncStatusCoroutine(&sync_env, &sync_status));
+ if (r < 0 && r != -ENOENT) {
+ ldout(store->ctx(), 0) << "ERROR: failed to fetch sync status r=" << r << dendl;
+ return r;
+ }
+
+ if (!mdlog_info.period.empty()) {
+ // restart sync if the remote has a period, but:
+ // a) our status does not, or
+ // b) our sync period comes before the remote's oldest log period
+ if (sync_status.sync_info.period.empty() ||
+ sync_status.sync_info.realm_epoch < mdlog_info.realm_epoch) {
+ sync_status.sync_info.state = rgw_meta_sync_info::StateInit;
+ ldout(store->ctx(), 1) << "epoch=" << sync_status.sync_info.realm_epoch
+ << " in sync status comes before remote's oldest mdlog epoch="
+ << mdlog_info.realm_epoch << ", restarting sync" << dendl;
+ }
+ }
+
+ if (sync_status.sync_info.state == rgw_meta_sync_info::StateInit) {
+ ldout(store->ctx(), 20) << __func__ << "(): init" << dendl;
+ sync_status.sync_info.num_shards = mdlog_info.num_shards;
+ auto cursor = store->period_history->get_current();
+ if (cursor) {
+ // run full sync, then start incremental from the current period/epoch
+ sync_status.sync_info.period = cursor.get_period().get_id();
+ sync_status.sync_info.realm_epoch = cursor.get_epoch();
+ }
+ r = run(new RGWInitSyncStatusCoroutine(&sync_env, sync_status.sync_info));
+ if (r == -EBUSY) {
+ backoff.backoff_sleep();
+ continue;
+ }
+ backoff.reset();
+ if (r < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to init sync status r=" << r << dendl;
+ return r;
+ }
+ }
+ } while (sync_status.sync_info.state == rgw_meta_sync_info::StateInit);
+
+ auto num_shards = sync_status.sync_info.num_shards;
+ if (num_shards != mdlog_info.num_shards) {
+ lderr(store->ctx()) << "ERROR: can't sync, mismatch between num shards, master num_shards=" << mdlog_info.num_shards << " local num_shards=" << num_shards << dendl;
+ return -EINVAL;
+ }
+
+ RGWPeriodHistory::Cursor cursor;
+ do {
+ r = run(new RGWReadSyncStatusCoroutine(&sync_env, &sync_status));
+ if (r < 0 && r != -ENOENT) {
+ ldout(store->ctx(), 0) << "ERROR: failed to fetch sync status r=" << r << dendl;
+ return r;
+ }
+
+ switch ((rgw_meta_sync_info::SyncState)sync_status.sync_info.state) {
+ case rgw_meta_sync_info::StateBuildingFullSyncMaps:
+ ldout(store->ctx(), 20) << __func__ << "(): building full sync maps" << dendl;
+ r = run(new RGWFetchAllMetaCR(&sync_env, num_shards, sync_status.sync_markers));
+ if (r == -EBUSY || r == -EAGAIN) {
+ backoff.backoff_sleep();
+ continue;
+ }
+ backoff.reset();
+ if (r < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to fetch all metadata keys" << dendl;
+ return r;
+ }
+
+ sync_status.sync_info.state = rgw_meta_sync_info::StateSync;
+ r = store_sync_info(sync_status.sync_info);
+ if (r < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to update sync status" << dendl;
+ return r;
+ }
+ /* fall through */
+ case rgw_meta_sync_info::StateSync:
+ ldout(store->ctx(), 20) << __func__ << "(): sync" << dendl;
+ // find our position in the period history (if any)
+ cursor = get_period_at(store, sync_status.sync_info);
+ r = cursor.get_error();
+ if (r < 0) {
+ return r;
+ }
+ meta_sync_cr = new RGWMetaSyncCR(&sync_env, cursor, sync_status);
+ r = run(meta_sync_cr);
+ if (r < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to fetch all metadata keys" << dendl;
+ return r;
+ }
+ break;
+ default:
+ ldout(store->ctx(), 0) << "ERROR: bad sync state!" << dendl;
+ return -EIO;
+ }
+ } while (!going_down);
+
+ return 0;
+}
+
+void RGWRemoteMetaLog::wakeup(int shard_id)
+{
+ if (!meta_sync_cr) {
+ return;
+ }
+ meta_sync_cr->wakeup(shard_id);
+}
+
+int RGWCloneMetaLogCoroutine::operate()
+{
+ reenter(this) {
+ do {
+ yield {
+ ldout(cct, 20) << __func__ << ": shard_id=" << shard_id << ": init request" << dendl;
+ return state_init();
+ }
+ yield {
+ ldout(cct, 20) << __func__ << ": shard_id=" << shard_id << ": reading shard status" << dendl;
+ return state_read_shard_status();
+ }
+ yield {
+ ldout(cct, 20) << __func__ << ": shard_id=" << shard_id << ": reading shard status complete" << dendl;
+ return state_read_shard_status_complete();
+ }
+ yield {
+ ldout(cct, 20) << __func__ << ": shard_id=" << shard_id << ": sending rest request" << dendl;
+ return state_send_rest_request();
+ }
+ yield {
+ ldout(cct, 20) << __func__ << ": shard_id=" << shard_id << ": receiving rest response" << dendl;
+ return state_receive_rest_response();
+ }
+ yield {
+ ldout(cct, 20) << __func__ << ": shard_id=" << shard_id << ": storing mdlog entries" << dendl;
+ return state_store_mdlog_entries();
+ }
+ } while (truncated);
+ yield {
+ ldout(cct, 20) << __func__ << ": shard_id=" << shard_id << ": storing mdlog entries complete" << dendl;
+ return state_store_mdlog_entries_complete();
+ }
+ }
+
+ return 0;
+}
+
+int RGWCloneMetaLogCoroutine::state_init()
+{
+ data = rgw_mdlog_shard_data();
+
+ return 0;
+}
+
+int RGWCloneMetaLogCoroutine::state_read_shard_status()
+{
+ const bool add_ref = false; // default constructs with refs=1
+
+ completion.reset(new RGWMetadataLogInfoCompletion(
+ [this](int ret, const cls_log_header& header) {
+ if (ret < 0) {
+ ldout(cct, 1) << "ERROR: failed to read mdlog info with "
+ << cpp_strerror(ret) << dendl;
+ } else {
+ shard_info.marker = header.max_marker;
+ shard_info.last_update = header.max_time.to_real_time();
+ }
+ // wake up parent stack
+ stack->get_completion_mgr()->complete(nullptr, stack);
+ }), add_ref);
+
+ int ret = mdlog->get_info_async(shard_id, completion.get());
+ if (ret < 0) {
+ ldout(cct, 0) << "ERROR: mdlog->get_info_async() returned ret=" << ret << dendl;
+ return set_cr_error(ret);
+ }
+
+ return io_block(0);
+}
+
+int RGWCloneMetaLogCoroutine::state_read_shard_status_complete()
+{
+ completion.reset();
+
+ ldout(cct, 20) << "shard_id=" << shard_id << " marker=" << shard_info.marker << " last_update=" << shard_info.last_update << dendl;
+
+ marker = shard_info.marker;
+
+ return 0;
+}
+
+int RGWCloneMetaLogCoroutine::state_send_rest_request()
+{
+ RGWRESTConn *conn = sync_env->conn;
+
+ char buf[32];
+ snprintf(buf, sizeof(buf), "%d", shard_id);
+
+ char max_entries_buf[32];
+ snprintf(max_entries_buf, sizeof(max_entries_buf), "%d", max_entries);
+
+ const char *marker_key = (marker.empty() ? "" : "marker");
+
+ rgw_http_param_pair pairs[] = { { "type", "metadata" },
+ { "id", buf },
+ { "period", period.c_str() },
+ { "max-entries", max_entries_buf },
+ { marker_key, marker.c_str() },
+ { NULL, NULL } };
+
+ http_op = new RGWRESTReadResource(conn, "/admin/log", pairs, NULL, sync_env->http_manager);
+
+ http_op->set_user_info((void *)stack);
+
+ int ret = http_op->aio_read();
+ if (ret < 0) {
+ ldout(cct, 0) << "ERROR: failed to fetch mdlog data" << dendl;
+ log_error() << "failed to send http operation: " << http_op->to_str() << " ret=" << ret << std::endl;
+ http_op->put();
+ http_op = NULL;
+ return ret;
+ }
+
+ return io_block(0);
+}
+
+int RGWCloneMetaLogCoroutine::state_receive_rest_response()
+{
+ int ret = http_op->wait(&data);
+ if (ret < 0) {
+ error_stream << "http operation failed: " << http_op->to_str() << " status=" << http_op->get_http_status() << std::endl;
+ ldout(cct, 5) << "failed to wait for op, ret=" << ret << dendl;
+ http_op->put();
+ http_op = NULL;
+ return set_cr_error(ret);
+ }
+ http_op->put();
+ http_op = NULL;
+
+ ldout(cct, 20) << "remote mdlog, shard_id=" << shard_id << " num of shard entries: " << data.entries.size() << dendl;
+
+ truncated = ((int)data.entries.size() == max_entries);
+
+ if (data.entries.empty()) {
+ if (new_marker) {
+ *new_marker = marker;
+ }
+ return set_cr_done();
+ }
+
+ if (new_marker) {
+ *new_marker = data.entries.back().id;
+ }
+
+ return 0;
+}
+
+
+int RGWCloneMetaLogCoroutine::state_store_mdlog_entries()
+{
+ list<cls_log_entry> dest_entries;
+
+ vector<rgw_mdlog_entry>::iterator iter;
+ for (iter = data.entries.begin(); iter != data.entries.end(); ++iter) {
+ rgw_mdlog_entry& entry = *iter;
+ ldout(cct, 20) << "entry: name=" << entry.name << dendl;
+
+ cls_log_entry dest_entry;
+ dest_entry.id = entry.id;
+ dest_entry.section = entry.section;
+ dest_entry.name = entry.name;
+ dest_entry.timestamp = utime_t(entry.timestamp);
+
+ ::encode(entry.log_data, dest_entry.data);
+
+ dest_entries.push_back(dest_entry);
+
+ marker = entry.id;
+ }
+
+ RGWAioCompletionNotifier *cn = stack->create_completion_notifier();
+
+ int ret = mdlog->store_entries_in_shard(dest_entries, shard_id, cn->completion());
+ if (ret < 0) {
+ cn->put();
+ ldout(cct, 10) << "failed to store md log entries shard_id=" << shard_id << " ret=" << ret << dendl;
+ return set_cr_error(ret);
+ }
+ return io_block(0);
+}
+
+int RGWCloneMetaLogCoroutine::state_store_mdlog_entries_complete()
+{
+ return set_cr_done();
+}
+
+
+// TODO: move into rgw_sync_trim.cc
+#undef dout_prefix
+#define dout_prefix (*_dout << "meta trim: ")
+
+/// purge all log shards for the given mdlog
+class PurgeLogShardsCR : public RGWShardCollectCR {
+ RGWRados *const store;
+ const RGWMetadataLog* mdlog;
+ const int num_shards;
+ rgw_raw_obj obj;
+ int i{0};
+
+ static constexpr int max_concurrent = 16;
+
+ public:
+ PurgeLogShardsCR(RGWRados *store, const RGWMetadataLog* mdlog,
+ const rgw_pool& pool, int num_shards)
+ : RGWShardCollectCR(store->ctx(), max_concurrent),
+ store(store), mdlog(mdlog), num_shards(num_shards), obj(pool, "")
+ {}
+
+ bool spawn_next() override {
+ if (i == num_shards) {
+ return false;
+ }
+ mdlog->get_shard_oid(i++, obj.oid);
+ spawn(new RGWRadosRemoveCR(store, obj), false);
+ return true;
+ }
+};
+
+using Cursor = RGWPeriodHistory::Cursor;
+
+/// purge mdlogs from the oldest up to (but not including) the given realm_epoch
+class PurgePeriodLogsCR : public RGWCoroutine {
+ RGWRados *const store;
+ RGWMetadataManager *const metadata;
+ RGWObjVersionTracker objv;
+ Cursor cursor;
+ epoch_t realm_epoch;
+ epoch_t *last_trim_epoch; //< update last trim on success
+
+ public:
+ PurgePeriodLogsCR(RGWRados *store, epoch_t realm_epoch, epoch_t *last_trim)
+ : RGWCoroutine(store->ctx()), store(store), metadata(store->meta_mgr),
+ realm_epoch(realm_epoch), last_trim_epoch(last_trim)
+ {}
+
+ int operate();
+};
+
+int PurgePeriodLogsCR::operate()
+{
+ reenter(this) {
+ // read our current oldest log period
+ yield call(metadata->read_oldest_log_period_cr(&cursor, &objv));
+ if (retcode < 0) {
+ return set_cr_error(retcode);
+ }
+ assert(cursor);
+ ldout(cct, 20) << "oldest log realm_epoch=" << cursor.get_epoch()
+ << " period=" << cursor.get_period().get_id() << dendl;
+
+ // trim -up to- the given realm_epoch
+ while (cursor.get_epoch() < realm_epoch) {
+ ldout(cct, 4) << "purging log shards for realm_epoch=" << cursor.get_epoch()
+ << " period=" << cursor.get_period().get_id() << dendl;
+ yield {
+ const auto mdlog = metadata->get_log(cursor.get_period().get_id());
+ const auto& pool = store->get_zone_params().log_pool;
+ auto num_shards = cct->_conf->rgw_md_log_max_shards;
+ call(new PurgeLogShardsCR(store, mdlog, pool, num_shards));
+ }
+ if (retcode < 0) {
+ ldout(cct, 1) << "failed to remove log shards: "
+ << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+ ldout(cct, 10) << "removed log shards for realm_epoch=" << cursor.get_epoch()
+ << " period=" << cursor.get_period().get_id() << dendl;
+
+ // update our mdlog history
+ yield call(metadata->trim_log_period_cr(cursor, &objv));
+ if (retcode == -ENOENT) {
+ // must have raced to update mdlog history. return success and allow the
+ // winner to continue purging
+ ldout(cct, 10) << "already removed log shards for realm_epoch=" << cursor.get_epoch()
+ << " period=" << cursor.get_period().get_id() << dendl;
+ return set_cr_done();
+ } else if (retcode < 0) {
+ ldout(cct, 1) << "failed to remove log shards for realm_epoch="
+ << cursor.get_epoch() << " period=" << cursor.get_period().get_id()
+ << " with: " << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+
+ if (*last_trim_epoch < cursor.get_epoch()) {
+ *last_trim_epoch = cursor.get_epoch();
+ }
+
+ assert(cursor.has_next()); // get_current() should always come after
+ cursor.next();
+ }
+ return set_cr_done();
+ }
+ return 0;
+}
+
+namespace {
+
+using connection_map = std::map<std::string, std::unique_ptr<RGWRESTConn>>;
+
+/// construct a RGWRESTConn for each zone in the realm
+template <typename Zonegroups>
+connection_map make_peer_connections(RGWRados *store,
+ const Zonegroups& zonegroups)
+{
+ connection_map connections;
+ for (auto& g : zonegroups) {
+ for (auto& z : g.second.zones) {
+ std::unique_ptr<RGWRESTConn> conn{
+ new RGWRESTConn(store->ctx(), store, z.first, z.second.endpoints)};
+ connections.emplace(z.first, std::move(conn));
+ }
+ }
+ return connections;
+}
+
+/// return the marker that it's safe to trim up to
+const std::string& get_stable_marker(const rgw_meta_sync_marker& m)
+{
+ return m.state == m.FullSync ? m.next_step_marker : m.marker;
+}
+
+/// comparison operator for take_min_status()
+bool operator<(const rgw_meta_sync_marker& lhs, const rgw_meta_sync_marker& rhs)
+{
+ // sort by stable marker
+ return get_stable_marker(lhs) < get_stable_marker(rhs);
+}
+
+/// populate the status with the minimum stable marker of each shard for any
+/// peer whose realm_epoch matches the minimum realm_epoch in the input
+template <typename Iter>
+int take_min_status(CephContext *cct, Iter first, Iter last,
+ rgw_meta_sync_status *status)
+{
+ if (first == last) {
+ return -EINVAL;
+ }
+ const size_t num_shards = cct->_conf->rgw_md_log_max_shards;
+
+ status->sync_info.realm_epoch = std::numeric_limits<epoch_t>::max();
+ for (auto p = first; p != last; ++p) {
+ // validate peer's shard count
+ if (p->sync_markers.size() != num_shards) {
+ ldout(cct, 1) << "take_min_status got peer status with "
+ << p->sync_markers.size() << " shards, expected "
+ << num_shards << dendl;
+ return -EINVAL;
+ }
+ if (p->sync_info.realm_epoch < status->sync_info.realm_epoch) {
+ // earlier epoch, take its entire status
+ *status = std::move(*p);
+ } else if (p->sync_info.realm_epoch == status->sync_info.realm_epoch) {
+ // same epoch, take any earlier markers
+ auto m = status->sync_markers.begin();
+ for (auto& shard : p->sync_markers) {
+ if (shard.second < m->second) {
+ m->second = std::move(shard.second);
+ }
+ ++m;
+ }
+ }
+ }
+ return 0;
+}
+
+struct TrimEnv {
+ RGWRados *const store;
+ RGWHTTPManager *const http;
+ int num_shards;
+ const std::string& zone;
+ Cursor current; //< cursor to current period
+ epoch_t last_trim_epoch{0}; //< epoch of last mdlog that was purged
+
+ TrimEnv(RGWRados *store, RGWHTTPManager *http, int num_shards)
+ : store(store), http(http), num_shards(num_shards),
+ zone(store->get_zone_params().get_id()),
+ current(store->period_history->get_current())
+ {}
+};
+
+struct MasterTrimEnv : public TrimEnv {
+ connection_map connections; //< peer connections
+ std::vector<rgw_meta_sync_status> peer_status; //< sync status for each peer
+ /// last trim marker for each shard, only applies to current period's mdlog
+ std::vector<std::string> last_trim_markers;
+
+ MasterTrimEnv(RGWRados *store, RGWHTTPManager *http, int num_shards)
+ : TrimEnv(store, http, num_shards),
+ last_trim_markers(num_shards)
+ {
+ auto& period = current.get_period();
+ connections = make_peer_connections(store, period.get_map().zonegroups);
+ connections.erase(zone);
+ peer_status.resize(connections.size());
+ }
+};
+
+struct PeerTrimEnv : public TrimEnv {
+ /// last trim timestamp for each shard, only applies to current period's mdlog
+ std::vector<ceph::real_time> last_trim_timestamps;
+
+ PeerTrimEnv(RGWRados *store, RGWHTTPManager *http, int num_shards)
+ : TrimEnv(store, http, num_shards),
+ last_trim_timestamps(num_shards)
+ {}
+
+ void set_num_shards(int num_shards) {
+ this->num_shards = num_shards;
+ last_trim_timestamps.resize(num_shards);
+ }
+};
+
+} // anonymous namespace
+
+
+/// spawn a trim cr for each shard that needs it, while limiting the number
+/// of concurrent shards
+class MetaMasterTrimShardCollectCR : public RGWShardCollectCR {
+ private:
+ static constexpr int MAX_CONCURRENT_SHARDS = 16;
+
+ MasterTrimEnv& env;
+ RGWMetadataLog *mdlog;
+ int shard_id{0};
+ std::string oid;
+ const rgw_meta_sync_status& sync_status;
+
+ public:
+ MetaMasterTrimShardCollectCR(MasterTrimEnv& env, RGWMetadataLog *mdlog,
+ const rgw_meta_sync_status& sync_status)
+ : RGWShardCollectCR(env.store->ctx(), MAX_CONCURRENT_SHARDS),
+ env(env), mdlog(mdlog), sync_status(sync_status)
+ {}
+
+ bool spawn_next() override;
+};
+
+bool MetaMasterTrimShardCollectCR::spawn_next()
+{
+ while (shard_id < env.num_shards) {
+ auto m = sync_status.sync_markers.find(shard_id);
+ if (m == sync_status.sync_markers.end()) {
+ shard_id++;
+ continue;
+ }
+ auto& stable = get_stable_marker(m->second);
+ auto& last_trim = env.last_trim_markers[shard_id];
+
+ if (stable <= last_trim) {
+ // already trimmed
+ ldout(cct, 20) << "skipping log shard " << shard_id
+ << " at marker=" << stable
+ << " last_trim=" << last_trim
+ << " realm_epoch=" << sync_status.sync_info.realm_epoch << dendl;
+ shard_id++;
+ continue;
+ }
+
+ mdlog->get_shard_oid(shard_id, oid);
+
+ ldout(cct, 10) << "trimming log shard " << shard_id
+ << " at marker=" << stable
+ << " last_trim=" << last_trim
+ << " realm_epoch=" << sync_status.sync_info.realm_epoch << dendl;
+ spawn(new RGWSyncLogTrimCR(env.store, oid, stable, &last_trim), false);
+ shard_id++;
+ return true;
+ }
+ return false;
+}
+
+/// spawn rest requests to read each peer's sync status
+class MetaMasterStatusCollectCR : public RGWShardCollectCR {
+ static constexpr int MAX_CONCURRENT_SHARDS = 16;
+
+ MasterTrimEnv& env;
+ connection_map::iterator c;
+ std::vector<rgw_meta_sync_status>::iterator s;
+ public:
+ MetaMasterStatusCollectCR(MasterTrimEnv& env)
+ : RGWShardCollectCR(env.store->ctx(), MAX_CONCURRENT_SHARDS),
+ env(env), c(env.connections.begin()), s(env.peer_status.begin())
+ {}
+
+ bool spawn_next() override {
+ if (c == env.connections.end()) {
+ return false;
+ }
+ static rgw_http_param_pair params[] = {
+ { "type", "metadata" },
+ { "status", nullptr },
+ { nullptr, nullptr }
+ };
+
+ ldout(cct, 20) << "query sync status from " << c->first << dendl;
+ auto conn = c->second.get();
+ using StatusCR = RGWReadRESTResourceCR<rgw_meta_sync_status>;
+ spawn(new StatusCR(cct, conn, env.http, "/admin/log/", params, &*s),
+ false);
+ ++c;
+ ++s;
+ return true;
+ }
+};
+
+class MetaMasterTrimCR : public RGWCoroutine {
+ MasterTrimEnv& env;
+ rgw_meta_sync_status min_status; //< minimum sync status of all peers
+ int ret{0};
+
+ public:
+ MetaMasterTrimCR(MasterTrimEnv& env)
+ : RGWCoroutine(env.store->ctx()), env(env)
+ {}
+
+ int operate();
+};
+
+int MetaMasterTrimCR::operate()
+{
+ reenter(this) {
+ // TODO: detect this and fail before we spawn the trim thread?
+ if (env.connections.empty()) {
+ ldout(cct, 4) << "no peers, exiting" << dendl;
+ return set_cr_done();
+ }
+
+ ldout(cct, 10) << "fetching sync status for zone " << env.zone << dendl;
+ // query mdlog sync status from peers
+ yield call(new MetaMasterStatusCollectCR(env));
+
+ // must get a successful reply from all peers to consider trimming
+ if (ret < 0) {
+ ldout(cct, 4) << "failed to fetch sync status from all peers" << dendl;
+ return set_cr_error(ret);
+ }
+
+ // determine the minimum epoch and markers
+ ret = take_min_status(env.store->ctx(), env.peer_status.begin(),
+ env.peer_status.end(), &min_status);
+ if (ret < 0) {
+ ldout(cct, 4) << "failed to calculate min sync status from peers" << dendl;
+ return set_cr_error(ret);
+ }
+ yield {
+ auto store = env.store;
+ auto epoch = min_status.sync_info.realm_epoch;
+ ldout(cct, 4) << "realm epoch min=" << epoch
+ << " current=" << env.current.get_epoch()<< dendl;
+ if (epoch > env.last_trim_epoch + 1) {
+ // delete any prior mdlog periods
+ spawn(new PurgePeriodLogsCR(store, epoch, &env.last_trim_epoch), true);
+ } else {
+ ldout(cct, 10) << "mdlogs already purged up to realm_epoch "
+ << env.last_trim_epoch << dendl;
+ }
+
+ // if realm_epoch == current, trim mdlog based on markers
+ if (epoch == env.current.get_epoch()) {
+ auto mdlog = store->meta_mgr->get_log(env.current.get_period().get_id());
+ spawn(new MetaMasterTrimShardCollectCR(env, mdlog, min_status), true);
+ }
+ }
+ // ignore any errors during purge/trim because we want to hold the lock open
+ return set_cr_done();
+ }
+ return 0;
+}
+
+
+/// read the first entry of the master's mdlog shard and trim to that position
+class MetaPeerTrimShardCR : public RGWCoroutine {
+ RGWMetaSyncEnv& env;
+ RGWMetadataLog *mdlog;
+ const std::string& period_id;
+ const int shard_id;
+ RGWMetadataLogInfo info;
+ ceph::real_time stable; //< safe timestamp to trim, according to master
+ ceph::real_time *last_trim; //< last trimmed timestamp, updated on trim
+ rgw_mdlog_shard_data result; //< result from master's mdlog listing
+
+ public:
+ MetaPeerTrimShardCR(RGWMetaSyncEnv& env, RGWMetadataLog *mdlog,
+ const std::string& period_id, int shard_id,
+ ceph::real_time *last_trim)
+ : RGWCoroutine(env.store->ctx()), env(env), mdlog(mdlog),
+ period_id(period_id), shard_id(shard_id), last_trim(last_trim)
+ {}
+
+ int operate() override;
+};
+
+int MetaPeerTrimShardCR::operate()
+{
+ reenter(this) {
+ // query master's first mdlog entry for this shard
+ yield call(new RGWListRemoteMDLogShardCR(&env, period_id, shard_id,
+ "", 1, &result));
+ if (retcode < 0) {
+ ldout(cct, 5) << "failed to read first entry from master's mdlog shard "
+ << shard_id << " for period " << period_id
+ << ": " << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+ if (result.entries.empty()) {
+ // if there are no mdlog entries, we don't have a timestamp to compare. we
+ // can't just trim everything, because there could be racing updates since
+ // this empty reply. query the mdlog shard info to read its max timestamp,
+ // then retry the listing to make sure it's still empty before trimming to
+ // that
+ ldout(cct, 10) << "empty master mdlog shard " << shard_id
+ << ", reading last timestamp from shard info" << dendl;
+ // read the mdlog shard info for the last timestamp
+ using ShardInfoCR = RGWReadRemoteMDLogShardInfoCR;
+ yield call(new ShardInfoCR(&env, period_id, shard_id, &info));
+ if (retcode < 0) {
+ ldout(cct, 5) << "failed to read info from master's mdlog shard "
+ << shard_id << " for period " << period_id
+ << ": " << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+ if (ceph::real_clock::is_zero(info.last_update)) {
+ return set_cr_done(); // nothing to trim
+ }
+ ldout(cct, 10) << "got mdlog shard info with last update="
+ << info.last_update << dendl;
+ // re-read the master's first mdlog entry to make sure it hasn't changed
+ yield call(new RGWListRemoteMDLogShardCR(&env, period_id, shard_id,
+ "", 1, &result));
+ if (retcode < 0) {
+ ldout(cct, 5) << "failed to read first entry from master's mdlog shard "
+ << shard_id << " for period " << period_id
+ << ": " << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+ // if the mdlog is still empty, trim to max marker
+ if (result.entries.empty()) {
+ stable = info.last_update;
+ } else {
+ stable = result.entries.front().timestamp;
+
+ // can only trim -up to- master's first timestamp, so subtract a second.
+ // (this is why we use timestamps instead of markers for the peers)
+ stable -= std::chrono::seconds(1);
+ }
+ } else {
+ stable = result.entries.front().timestamp;
+ stable -= std::chrono::seconds(1);
+ }
+
+ if (stable <= *last_trim) {
+ ldout(cct, 10) << "skipping log shard " << shard_id
+ << " at timestamp=" << stable
+ << " last_trim=" << *last_trim << dendl;
+ return set_cr_done();
+ }
+
+ ldout(cct, 10) << "trimming log shard " << shard_id
+ << " at timestamp=" << stable
+ << " last_trim=" << *last_trim << dendl;
+ yield {
+ std::string oid;
+ mdlog->get_shard_oid(shard_id, oid);
+ call(new RGWRadosTimelogTrimCR(env.store, oid, real_time{}, stable, "", ""));
+ }
+ if (retcode < 0 && retcode != -ENODATA) {
+ ldout(cct, 1) << "failed to trim mdlog shard " << shard_id
+ << ": " << cpp_strerror(retcode) << dendl;
+ return set_cr_error(retcode);
+ }
+ *last_trim = stable;
+ return set_cr_done();
+ }
+ return 0;
+}
+
+class MetaPeerTrimShardCollectCR : public RGWShardCollectCR {
+ static constexpr int MAX_CONCURRENT_SHARDS = 16;
+
+ PeerTrimEnv& env;
+ RGWMetadataLog *mdlog;
+ const std::string& period_id;
+ RGWMetaSyncEnv meta_env; //< for RGWListRemoteMDLogShardCR
+ int shard_id{0};
+
+ public:
+ MetaPeerTrimShardCollectCR(PeerTrimEnv& env, RGWMetadataLog *mdlog)
+ : RGWShardCollectCR(env.store->ctx(), MAX_CONCURRENT_SHARDS),
+ env(env), mdlog(mdlog), period_id(env.current.get_period().get_id())
+ {
+ meta_env.init(cct, env.store, env.store->rest_master_conn,
+ env.store->get_async_rados(), env.http, nullptr);
+ }
+
+ bool spawn_next() override;
+};
+
+bool MetaPeerTrimShardCollectCR::spawn_next()
+{
+ if (shard_id >= env.num_shards) {
+ return false;
+ }
+ auto& last_trim = env.last_trim_timestamps[shard_id];
+ spawn(new MetaPeerTrimShardCR(meta_env, mdlog, period_id, shard_id, &last_trim),
+ false);
+ shard_id++;
+ return true;
+}
+
+class MetaPeerTrimCR : public RGWCoroutine {
+ PeerTrimEnv& env;
+ rgw_mdlog_info mdlog_info; //< master's mdlog info
+
+ public:
+ MetaPeerTrimCR(PeerTrimEnv& env) : RGWCoroutine(env.store->ctx()), env(env) {}
+
+ int operate();
+};
+
+int MetaPeerTrimCR::operate()
+{
+ reenter(this) {
+ ldout(cct, 10) << "fetching master mdlog info" << dendl;
+ yield {
+ // query mdlog_info from master for oldest_log_period
+ rgw_http_param_pair params[] = {
+ { "type", "metadata" },
+ { nullptr, nullptr }
+ };
+
+ using LogInfoCR = RGWReadRESTResourceCR<rgw_mdlog_info>;
+ call(new LogInfoCR(cct, env.store->rest_master_conn, env.http,
+ "/admin/log/", params, &mdlog_info));
+ }
+ if (retcode < 0) {
+ ldout(cct, 4) << "failed to read mdlog info from master" << dendl;
+ return set_cr_error(retcode);
+ }
+ // use master's shard count instead
+ env.set_num_shards(mdlog_info.num_shards);
+
+ if (mdlog_info.realm_epoch > env.last_trim_epoch + 1) {
+ // delete any prior mdlog periods
+ yield call(new PurgePeriodLogsCR(env.store, mdlog_info.realm_epoch,
+ &env.last_trim_epoch));
+ } else {
+ ldout(cct, 10) << "mdlogs already purged through realm_epoch "
+ << env.last_trim_epoch << dendl;
+ }
+
+ // if realm_epoch == current, trim mdlog based on master's markers
+ if (mdlog_info.realm_epoch == env.current.get_epoch()) {
+ yield {
+ auto meta_mgr = env.store->meta_mgr;
+ auto mdlog = meta_mgr->get_log(env.current.get_period().get_id());
+ call(new MetaPeerTrimShardCollectCR(env, mdlog));
+ // ignore any errors during purge/trim because we want to hold the lock open
+ }
+ }
+ return set_cr_done();
+ }
+ return 0;
+}
+
+class MetaTrimPollCR : public RGWCoroutine {
+ RGWRados *const store;
+ const utime_t interval; //< polling interval
+ const rgw_raw_obj obj;
+ const std::string name{"meta_trim"}; //< lock name
+ const std::string cookie;
+
+ protected:
+ /// allocate the coroutine to run within the lease
+ virtual RGWCoroutine* alloc_cr() = 0;
+
+ public:
+ MetaTrimPollCR(RGWRados *store, utime_t interval)
+ : RGWCoroutine(store->ctx()), store(store), interval(interval),
+ obj(store->get_zone_params().log_pool, RGWMetadataLogHistory::oid),
+ cookie(RGWSimpleRadosLockCR::gen_random_cookie(cct))
+ {}
+
+ int operate();
+};
+
+int MetaTrimPollCR::operate()
+{
+ reenter(this) {
+ for (;;) {
+ set_status("sleeping");
+ wait(interval);
+
+ // prevent others from trimming for our entire wait interval
+ set_status("acquiring trim lock");
+ yield call(new RGWSimpleRadosLockCR(store->get_async_rados(), store,
+ obj, name, cookie, interval.sec()));
+ if (retcode < 0) {
+ ldout(cct, 4) << "failed to lock: " << cpp_strerror(retcode) << dendl;
+ continue;
+ }
+
+ set_status("trimming");
+ yield call(alloc_cr());
+
+ if (retcode < 0) {
+ // on errors, unlock so other gateways can try
+ set_status("unlocking");
+ yield call(new RGWSimpleRadosUnlockCR(store->get_async_rados(), store,
+ obj, name, cookie));
+ }
+ }
+ }
+ return 0;
+}
+
+class MetaMasterTrimPollCR : public MetaTrimPollCR {
+ MasterTrimEnv env; //< trim state to share between calls
+ RGWCoroutine* alloc_cr() override {
+ return new MetaMasterTrimCR(env);
+ }
+ public:
+ MetaMasterTrimPollCR(RGWRados *store, RGWHTTPManager *http,
+ int num_shards, utime_t interval)
+ : MetaTrimPollCR(store, interval),
+ env(store, http, num_shards)
+ {}
+};
+
+class MetaPeerTrimPollCR : public MetaTrimPollCR {
+ PeerTrimEnv env; //< trim state to share between calls
+ RGWCoroutine* alloc_cr() override {
+ return new MetaPeerTrimCR(env);
+ }
+ public:
+ MetaPeerTrimPollCR(RGWRados *store, RGWHTTPManager *http,
+ int num_shards, utime_t interval)
+ : MetaTrimPollCR(store, interval),
+ env(store, http, num_shards)
+ {}
+};
+
+RGWCoroutine* create_meta_log_trim_cr(RGWRados *store, RGWHTTPManager *http,
+ int num_shards, utime_t interval)
+{
+ if (store->is_meta_master()) {
+ return new MetaMasterTrimPollCR(store, http, num_shards, interval);
+ }
+ return new MetaPeerTrimPollCR(store, http, num_shards, interval);
+}
+
+
+struct MetaMasterAdminTrimCR : private MasterTrimEnv, public MetaMasterTrimCR {
+ MetaMasterAdminTrimCR(RGWRados *store, RGWHTTPManager *http, int num_shards)
+ : MasterTrimEnv(store, http, num_shards),
+ MetaMasterTrimCR(*static_cast<MasterTrimEnv*>(this))
+ {}
+};
+
+struct MetaPeerAdminTrimCR : private PeerTrimEnv, public MetaPeerTrimCR {
+ MetaPeerAdminTrimCR(RGWRados *store, RGWHTTPManager *http, int num_shards)
+ : PeerTrimEnv(store, http, num_shards),
+ MetaPeerTrimCR(*static_cast<PeerTrimEnv*>(this))
+ {}
+};
+
+RGWCoroutine* create_admin_meta_log_trim_cr(RGWRados *store,
+ RGWHTTPManager *http,
+ int num_shards)
+{
+ if (store->is_meta_master()) {
+ return new MetaMasterAdminTrimCR(store, http, num_shards);
+ }
+ return new MetaPeerAdminTrimCR(store, http, num_shards);
+}
Code Review / stor4nfv.git / blobdiff