-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
+ * License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
- *
+ *
*/
-/*
- * This is the top level monitor. It runs on each machine in the Monitor
- * Cluster. The election of a leader for the paxos algorithm only happens
- * once per machine via the elector. There is a separate paxos instance (state)
- * kept for each of the system components: Object Store Device (OSD) Monitor,
+/*
+ * This is the top level monitor. It runs on each machine in the Monitor
+ * Cluster. The election of a leader for the paxos algorithm only happens
+ * once per machine via the elector. There is a separate paxos instance (state)
+ * kept for each of the system components: Object Store Device (OSD) Monitor,
* Placement Group (PG) Monitor, Metadata Server (MDS) Monitor, and Client Monitor.
*/
#include <errno.h>
#include <cmath>
#include <string>
+#include <array>
#include "include/types.h"
#include "include/health.h"
#include "auth/cephx/CephxKeyServer.h"
#include "auth/AuthMethodList.h"
#include "auth/KeyRing.h"
+#include "include/common_fwd.h"
#include "messages/MMonCommand.h"
#include "mon/MonitorDBStore.h"
#include "mgr/MgrClient.h"
#include "mon/MonOpRequest.h"
#include "common/WorkQueue.h"
+using namespace TOPNSPC::common;
#define CEPH_MON_PROTOCOL 13 /* cluster internal */
l_mon_last,
};
-class QuorumService;
class PaxosService;
-class PerfCounters;
class AdminSocketHook;
#define COMPAT_SET_LOC "feature_set"
-class C_MonContext final : public FunctionContext {
- const Monitor *mon;
-public:
- explicit C_MonContext(Monitor *m, boost::function<void(int)>&& callback)
- : FunctionContext(std::move(callback)), mon(m) {}
- void finish(int r) override;
-};
-
class Monitor : public Dispatcher,
public AuthClient,
public AuthServer,
const char **orig_argv = nullptr;
// me
- string name;
+ std::string name;
int rank;
Messenger *messenger;
ConnectionRef con_self;
- Mutex lock;
+ ceph::mutex lock = ceph::make_mutex("Monitor::lock");
SafeTimer timer;
Finisher finisher;
ThreadPool cpu_tp; ///< threadpool for CPU intensive work
MonMap *monmap;
uuid_d fingerprint;
- set<entity_addrvec_t> extra_probe_peers;
+ std::set<entity_addrvec_t> extra_probe_peers;
LogClient log_client;
LogChannelRef clog;
CompatSet features;
- vector<MonCommand> leader_mon_commands; // quorum leader's commands
- vector<MonCommand> local_mon_commands; // commands i support
- bufferlist local_mon_commands_bl; // encoded version of above
+ std::vector<MonCommand> leader_mon_commands; // quorum leader's commands
+ std::vector<MonCommand> local_mon_commands; // commands i support
+ ceph::buffer::list local_mon_commands_bl; // encoded version of above
- vector<MonCommand> prenautilus_local_mon_commands;
- bufferlist prenautilus_local_mon_commands_bl;
+ std::vector<MonCommand> prenautilus_local_mon_commands;
+ ceph::buffer::list prenautilus_local_mon_commands_bl;
Messenger *mgr_messenger;
MgrClient mgr_client;
// -- local storage --
public:
MonitorDBStore *store;
- static const string MONITOR_NAME;
- static const string MONITOR_STORE_PREFIX;
+ static const std::string MONITOR_NAME;
+ static const std::string MONITOR_STORE_PREFIX;
// -- monitor state --
private:
std::vector<DaemonHealthMetric> get_health_metrics();
+ int quorum_age() const {
+ auto age = std::chrono::duration_cast<std::chrono::seconds>(
+ ceph::mono_clock::now() - quorum_since);
+ return age.count();
+ }
+
+ bool is_mon_down() const {
+ int max = monmap->size();
+ int actual = get_quorum().size();
+ auto now = ceph::real_clock::now();
+ return actual < max && now > monmap->created.to_real_time();
+ }
+
// -- elector --
private:
- Paxos *paxos;
+ std::unique_ptr<Paxos> paxos;
Elector elector;
friend class Elector;
uint64_t required_features;
int leader; // current leader (to best of knowledge)
- set<int> quorum; // current active set of monitors (if !starting)
- mono_clock::time_point quorum_since; // when quorum formed
+ std::set<int> quorum; // current active set of monitors (if !starting)
+ ceph::mono_clock::time_point quorum_since; // when quorum formed
utime_t leader_since; // when this monitor became the leader, if it is the leader
utime_t exited_quorum; // time detected as not in quorum; 0 if in
// map of counts of connected clients, by type and features, for
// each quorum mon
- map<int,FeatureMap> quorum_feature_map;
+ std::map<int,FeatureMap> quorum_feature_map;
/**
* Intersection of quorum member's connection feature bits.
*/
mon_feature_t quorum_mon_features;
- int quorum_min_mon_release = -1;
+ ceph_release_t quorum_min_mon_release{ceph_release_t::unknown};
+
+ std::set<std::string> outside_quorum;
+
+ bool stretch_mode_engaged{false};
+ bool degraded_stretch_mode{false};
+ bool recovering_stretch_mode{false};
+ std::string stretch_bucket_divider;
+ std::map<std::string, std::set<std::string>> dead_mon_buckets; // bucket->mon ranks, locations with no live mons
+ std::set<std::string> up_mon_buckets; // locations with a live mon
+ void do_stretch_mode_election_work();
- set<string> outside_quorum;
+ bool session_stretch_allowed(MonSession *s, MonOpRequestRef& op);
+ void disconnect_disallowed_stretch_sessions();
+ void set_elector_disallowed_leaders(bool allow_election);
+
+ std::map<std::string,std::string> crush_loc;
+ bool need_set_crush_loc{false};
+public:
+ bool is_stretch_mode() { return stretch_mode_engaged; }
+ bool is_degraded_stretch_mode() { return degraded_stretch_mode; }
+ bool is_recovering_stretch_mode() { return recovering_stretch_mode; }
+
+ /**
+ * This set of functions maintains the in-memory stretch state
+ * and sets up transitions of the map states by calling in to
+ * MonmapMonitor and OSDMonitor.
+ *
+ * The [maybe_]go_* functions are called on the leader to
+ * decide if transitions should happen; the trigger_* functions
+ * set up the map transitions; and the set_* functions actually
+ * change the memory state -- but these are only called
+ * via OSDMonitor::update_from_paxos, to guarantee consistent
+ * updates across the entire cluster.
+ */
+ void try_engage_stretch_mode();
+ void maybe_go_degraded_stretch_mode();
+ void trigger_degraded_stretch_mode(const std::set<std::string>& dead_mons,
+ const std::set<int>& dead_buckets);
+ void set_degraded_stretch_mode();
+ void go_recovery_stretch_mode();
+ void set_recovery_stretch_mode();
+ void trigger_healthy_stretch_mode();
+ void set_healthy_stretch_mode();
+ void enable_stretch_mode();
+ void set_mon_crush_location(const std::string& loc);
+
+
+private:
/**
* @defgroup Monitor_h_scrub
* @{
*/
version_t scrub_version; ///< paxos version we are scrubbing
- map<int,ScrubResult> scrub_result; ///< results so far
+ std::map<int,ScrubResult> scrub_result; ///< results so far
/**
* trigger a cross-mon scrub
int scrub();
void handle_scrub(MonOpRequestRef op);
bool _scrub(ScrubResult *r,
- pair<string,string> *start,
+ std::pair<std::string,std::string> *start,
int *num_keys);
void scrub_check_results();
void scrub_timeout();
void scrub_finish();
void scrub_reset();
- void scrub_update_interval(int secs);
+ void scrub_update_interval(ceph::timespan interval);
Context *scrub_event; ///< periodic event to trigger scrub (leader)
Context *scrub_timeout_event; ///< scrub round timeout (leader)
void scrub_cancel_timeout();
struct ScrubState {
- pair<string,string> last_key; ///< last scrubbed key
+ std::pair<std::string,std::string> last_key; ///< last scrubbed key
bool finished;
ScrubState() : finished(false) { }
uint64_t cookie; ///< unique cookie for this sync attempt
utime_t timeout; ///< when we give up and expire this attempt
version_t last_committed; ///< last paxos version on peer
- pair<string,string> last_key; ///< last key sent to (or on) peer
+ std::pair<std::string,std::string> last_key; ///< last key sent to (or on) peer
bool full; ///< full scan?
MonitorDBStore::Synchronizer synchronizer; ///< iterator
}
};
- map<uint64_t, SyncProvider> sync_providers; ///< cookie -> SyncProvider for those syncing from us
+ std::map<std::uint64_t, SyncProvider> sync_providers; ///< cookie -> SyncProvider for those syncing from us
uint64_t sync_provider_count; ///< counter for issued cookies to keep them unique
/**
*
* @returns a set of strings referring to the prefixes being synchronized
*/
- set<string> get_sync_targets_names();
+ std::set<std::string> get_sync_targets_names();
/**
* Reset the monitor's sync-related data structures for syncing *from* a peer
/**
* Get the latest monmap for backup purposes during sync
*/
- void sync_obtain_latest_monmap(bufferlist &bl);
+ void sync_obtain_latest_monmap(ceph::buffer::list &bl);
/**
* Start sync process
/**
* force a sync on next mon restart
*/
- void sync_force(Formatter *f, ostream& ss);
+ void sync_force(ceph::Formatter *f);
private:
/**
* @} // Synchronization
*/
- list<Context*> waitfor_quorum;
- list<Context*> maybe_wait_for_quorum;
+ std::list<Context*> waitfor_quorum;
+ std::list<Context*> maybe_wait_for_quorum;
/**
* @defgroup Monitor_h_TimeCheck Monitor Clock Drift Early Warning System
* - Once all the quorum members have pong'ed, the leader will share the
* clock skew and latency maps with all the monitors in the quorum.
*/
- map<int, utime_t> timecheck_waiting;
- map<int, double> timecheck_skews;
- map<int, double> timecheck_latencies;
+ std::map<int, utime_t> timecheck_waiting;
+ std::map<int, double> timecheck_skews;
+ std::map<int, double> timecheck_latencies;
// odd value means we are mid-round; even value means the round has
// finished.
version_t timecheck_round;
void timecheck_check_skews();
void timecheck_report();
void timecheck();
- health_status_t timecheck_status(ostringstream &ss,
+ health_status_t timecheck_status(std::ostringstream &ss,
const double skew_bound,
const double latency);
void handle_timecheck_leader(MonOpRequestRef op);
public:
epoch_t get_epoch();
int get_leader() const { return leader; }
- string get_leader_name() {
- return quorum.empty() ? string() : monmap->get_name(*quorum.begin());
+ std::string get_leader_name() {
+ return quorum.empty() ? std::string() : monmap->get_name(leader);
}
- const set<int>& get_quorum() const { return quorum; }
- list<string> get_quorum_names() {
- list<string> q;
- for (set<int>::iterator p = quorum.begin(); p != quorum.end(); ++p)
+ const std::set<int>& get_quorum() const { return quorum; }
+ std::list<std::string> get_quorum_names() {
+ std::list<std::string> q;
+ for (auto p = quorum.begin(); p != quorum.end(); ++p)
q.push_back(monmap->get_name(*p));
return q;
}
void start_election();
void win_standalone_election();
// end election (called by Elector)
- void win_election(epoch_t epoch, set<int>& q,
+ void win_election(epoch_t epoch, const std::set<int>& q,
uint64_t features,
const mon_feature_t& mon_features,
- int min_mon_release,
- const map<int,Metadata>& metadata);
- void lose_election(epoch_t epoch, set<int>& q, int l,
+ ceph_release_t min_mon_release,
+ const std::map<int,Metadata>& metadata);
+ void lose_election(epoch_t epoch, std::set<int>& q, int l,
uint64_t features,
const mon_feature_t& mon_features,
- int min_mon_release);
+ ceph_release_t min_mon_release);
// end election (called by Elector)
void finish_election();
/**
* Vector holding the Services serviced by this Monitor.
*/
- vector<std::unique_ptr<PaxosService>> paxos_service;
+ std::array<std::unique_ptr<PaxosService>, PAXOS_NUM> paxos_service;
class MDSMonitor *mdsmon() {
return (class MDSMonitor *)paxos_service[PAXOS_MDSMAP].get();
return (class ConfigMonitor*) paxos_service[PAXOS_CONFIG].get();
}
+ class KVMonitor *kvmon() {
+ return (class KVMonitor*) paxos_service[PAXOS_KV].get();
+ }
+
friend class Paxos;
friend class OSDMonitor;
friend class MDSMonitor;
friend class MonmapMonitor;
friend class LogMonitor;
- friend class ConfigKeyService;
-
- QuorumService *config_key_service;
+ friend class KVMonitor;
// -- sessions --
MonSessionMap session_map;
- Mutex session_map_lock{"Monitor::session_map_lock"};
+ ceph::mutex session_map_lock = ceph::make_mutex("Monitor::session_map_lock");
AdminSocketHook *admin_hook;
template<typename Func, typename...Args>
void handle_mon_get_map(MonOpRequestRef op);
static void _generate_command_map(cmdmap_t& cmdmap,
- map<string,string> ¶m_str_map);
+ std::map<std::string,std::string> ¶m_str_map);
static const MonCommand *_get_moncommand(
- const string &cmd_prefix,
- const vector<MonCommand>& cmds);
- bool _allowed_command(MonSession *s, const string& module,
- const string& prefix,
+ const std::string &cmd_prefix,
+ const std::vector<MonCommand>& cmds);
+ bool _allowed_command(MonSession *s, const std::string& module,
+ const std::string& prefix,
const cmdmap_t& cmdmap,
- const map<string,string>& param_str_map,
+ const std::map<std::string,std::string>& param_str_map,
const MonCommand *this_cmd);
- void get_mon_status(Formatter *f, ostream& ss);
- void _quorum_status(Formatter *f, ostream& ss);
+ void get_mon_status(ceph::Formatter *f);
+ void _quorum_status(ceph::Formatter *f, std::ostream& ss);
bool _add_bootstrap_peer_hint(std::string_view cmd, const cmdmap_t& cmdmap,
std::ostream& ss);
+ void handle_tell_command(MonOpRequestRef op);
void handle_command(MonOpRequestRef op);
void handle_route(MonOpRequestRef op);
- void handle_mon_metadata(MonOpRequestRef op);
- int get_mon_metadata(int mon, Formatter *f, ostream& err);
- int print_nodes(Formatter *f, ostream& err);
+ int get_mon_metadata(int mon, ceph::Formatter *f, std::ostream& err);
+ int print_nodes(ceph::Formatter *f, std::ostream& err);
- // Accumulate metadata across calls to update_mon_metadata
- map<int, Metadata> mon_metadata;
- map<int, Metadata> pending_metadata;
+ // track metadata reported by win_election()
+ std::map<int, Metadata> mon_metadata;
+ std::map<int, Metadata> pending_metadata;
/**
*
*/
struct health_cache_t {
health_status_t overall;
- string summary;
+ std::string summary;
void reset() {
// health_status_t doesn't really have a NONE value and we're not
void health_tick_start();
void health_tick_stop();
- utime_t health_interval_calc_next_update();
+ ceph::real_clock::time_point health_interval_calc_next_update();
void health_interval_start();
void health_interval_stop();
void health_events_cleanup();
void do_health_to_clog_interval();
void do_health_to_clog(bool force = false);
- health_status_t get_health_status(
- bool want_detail,
- Formatter *f,
- std::string *plain,
- const char *sep1 = " ",
- const char *sep2 = "; ");
void log_health(
const health_check_map_t& updated,
const health_check_map_t& previous,
MonitorDBStore::TransactionRef t);
+ void update_pending_metadata();
+
protected:
class HealthCheckLogStatus {
public:
- void get_cluster_status(stringstream &ss, Formatter *f);
+ void get_cluster_status(std::stringstream &ss, ceph::Formatter *f,
+ MonSession *session);
+
+ void reply_command(MonOpRequestRef op, int rc, const std::string &rs, version_t version);
+ void reply_command(MonOpRequestRef op, int rc, const std::string &rs, ceph::buffer::list& rdata, version_t version);
+
+ void reply_tell_command(MonOpRequestRef op, int rc, const std::string &rs);
- void reply_command(MonOpRequestRef op, int rc, const string &rs, version_t version);
- void reply_command(MonOpRequestRef op, int rc, const string &rs, bufferlist& rdata, version_t version);
void handle_probe(MonOpRequestRef op);
// request routing
struct RoutedRequest {
uint64_t tid;
- bufferlist request_bl;
+ ceph::buffer::list request_bl;
MonSession *session;
ConnectionRef con;
uint64_t con_features;
}
};
uint64_t routed_request_tid;
- map<uint64_t, RoutedRequest*> routed_requests;
-
+ std::map<uint64_t, RoutedRequest*> routed_requests;
+
void forward_request_leader(MonOpRequestRef op);
void handle_forward(MonOpRequestRef op);
void send_reply(MonOpRequestRef op, Message *reply);
void waitlist_or_zap_client(MonOpRequestRef op);
void send_mon_message(Message *m, int rank);
+ /** can_change_external_state if we can do things like
+ * call elections as a result of the new map.
+ */
+ void notify_new_monmap(bool can_change_external_state=false, bool remove_rank_elector=true);
public:
struct C_Command : public C_MonOp {
- Monitor *mon;
+ Monitor &mon;
int rc;
- string rs;
- bufferlist rdata;
+ std::string rs;
+ ceph::buffer::list rdata;
version_t version;
- C_Command(Monitor *_mm, MonOpRequestRef _op, int r, string s, version_t v) :
+ C_Command(Monitor &_mm, MonOpRequestRef _op, int r, std::string s, version_t v) :
C_MonOp(_op), mon(_mm), rc(r), rs(s), version(v){}
- C_Command(Monitor *_mm, MonOpRequestRef _op, int r, string s, bufferlist rd, version_t v) :
+ C_Command(Monitor &_mm, MonOpRequestRef _op, int r, std::string s, ceph::buffer::list rd, version_t v) :
C_MonOp(_op), mon(_mm), rc(r), rs(s), rdata(rd), version(v){}
void _finish(int r) override {
- MMonCommand *m = static_cast<MMonCommand*>(op->get_req());
+ auto m = op->get_req<MMonCommand>();
if (r >= 0) {
- ostringstream ss;
+ std::ostringstream ss;
if (!op->get_req()->get_connection()) {
ss << "connection dropped for command ";
} else {
ss << "session dropped for command ";
}
}
- ss << "cmd='" << m->cmd << "': finished";
-
- mon->audit_clog->info() << ss.str();
- mon->reply_command(op, rc, rs, rdata, version);
+ cmdmap_t cmdmap;
+ std::ostringstream ds;
+ std::string prefix;
+ cmdmap_from_json(m->cmd, &cmdmap, ds);
+ cmd_getval(cmdmap, "prefix", prefix);
+ if (prefix != "config set" && prefix != "config-key set")
+ ss << "cmd='" << m->cmd << "': finished";
+
+ mon.audit_clog->info() << ss.str();
+ mon.reply_command(op, rc, rs, rdata, version);
}
else if (r == -ECANCELED)
return;
else if (r == -EAGAIN)
- mon->dispatch_op(op);
+ mon.dispatch_op(op);
else
ceph_abort_msg("bad C_Command return value");
}
//on forwarded messages, so we create a non-locking version for this class
void _ms_dispatch(Message *m);
bool ms_dispatch(Message *m) override {
- lock.Lock();
+ std::lock_guard l{lock};
_ms_dispatch(m);
- lock.Unlock();
return true;
}
void dispatch_op(MonOpRequestRef op);
//mon_caps is used for un-connected messages from monitors
MonCap mon_caps;
- bool ms_get_authorizer(int dest_type, AuthAuthorizer **authorizer) override;
- KeyStore *ms_get_auth1_authorizer_keystore();
+ bool get_authorizer(int dest_type, AuthAuthorizer **authorizer);
public: // for AuthMonitor msgr1:
int ms_handle_authentication(Connection *con) override;
private:
Connection *con,
AuthConnectionMeta *auth_meta,
uint32_t *method,
- vector<uint32_t> *preferred_modes,
- bufferlist *out) override;
+ std::vector<uint32_t> *preferred_modes,
+ ceph::buffer::list *out) override;
int handle_auth_reply_more(
Connection *con,
AuthConnectionMeta *auth_meta,
- const bufferlist& bl,
- bufferlist *reply) override;
+ const ceph::buffer::list& bl,
+ ceph::buffer::list *reply) override;
int handle_auth_done(
Connection *con,
AuthConnectionMeta *auth_meta,
uint64_t global_id,
uint32_t con_mode,
- const bufferlist& bl,
+ const ceph::buffer::list& bl,
CryptoKey *session_key,
std::string *connection_secret) override;
int handle_auth_bad_method(
AuthConnectionMeta *auth_meta,
bool more,
uint32_t auth_method,
- const bufferlist& bl,
- bufferlist *reply) override;
+ const ceph::buffer::list& bl,
+ ceph::buffer::list *reply) override;
// /AuthServer
- int write_default_keyring(bufferlist& bl);
+ int write_default_keyring(ceph::buffer::list& bl);
void extract_save_mon_key(KeyRing& keyring);
void collect_metadata(Metadata *m);
- void update_mon_metadata(int from, Metadata&& m);
int load_metadata();
- void count_metadata(const string& field, Formatter *f);
- void count_metadata(const string& field, map<string,int> *out);
+ void count_metadata(const std::string& field, ceph::Formatter *f);
+ void count_metadata(const std::string& field, std::map<std::string,int> *out);
+ // get_all_versions() gathers version information from daemons for health check
+ void get_all_versions(std::map<std::string, std::list<std::string>> &versions);
+ void get_versions(std::map<std::string, std::list<std::string>> &versions);
// features
static CompatSet get_initial_supported_features();
OpTracker op_tracker;
public:
- Monitor(CephContext *cct_, string nm, MonitorDBStore *s,
+ Monitor(CephContext *cct_, std::string nm, MonitorDBStore *s,
Messenger *m, Messenger *mgr_m, MonMap *map);
~Monitor() override;
void handle_signal(int sig);
- int mkfs(bufferlist& osdmapbl);
+ int mkfs(ceph::buffer::list& osdmapbl);
/**
* check cluster_fsid file
int write_fsid();
int write_fsid(MonitorDBStore::TransactionRef t);
- void do_admin_command(std::string_view command, const cmdmap_t& cmdmap,
- std::string_view format, std::ostream& ss);
+ int do_admin_command(std::string_view command, const cmdmap_t& cmdmap,
+ ceph::Formatter *f,
+ std::ostream& err,
+ std::ostream& out);
private:
// don't allow copying
public:
static void format_command_descriptions(const std::vector<MonCommand> &commands,
- Formatter *f,
+ ceph::Formatter *f,
uint64_t features,
- bufferlist *rdata);
+ ceph::buffer::list *rdata);
const std::vector<MonCommand> &get_local_commands(mon_feature_t f) {
if (f.contains_all(ceph::features::mon::FEATURE_NAUTILUS)) {
return prenautilus_local_mon_commands;
}
}
- const bufferlist& get_local_commands_bl(mon_feature_t f) {
+ const ceph::buffer::list& get_local_commands_bl(mon_feature_t f) {
if (f.contains_all(ceph::features::mon::FEATURE_NAUTILUS)) {
return local_mon_commands_bl;
} else {
#define CEPH_MON_FEATURE_INCOMPAT_LUMINOUS CompatSet::Feature(9, "luminous ondisk layout")
#define CEPH_MON_FEATURE_INCOMPAT_MIMIC CompatSet::Feature(10, "mimic ondisk layout")
#define CEPH_MON_FEATURE_INCOMPAT_NAUTILUS CompatSet::Feature(11, "nautilus ondisk layout")
+#define CEPH_MON_FEATURE_INCOMPAT_OCTOPUS CompatSet::Feature(12, "octopus ondisk layout")
+#define CEPH_MON_FEATURE_INCOMPAT_PACIFIC CompatSet::Feature(13, "pacific ondisk layout")
+#define CEPH_MON_FEATURE_INCOMPAT_QUINCY CompatSet::Feature(14, "quincy ondisk layout")
// make sure you add your feature to Monitor::get_supported_features
+/* Callers use:
+ *
+ * new C_MonContext{...}
+ *
+ * instead of
+ *
+ * new C_MonContext(...)
+ *
+ * because of gcc bug [1].
+ *
+ * [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85883
+ */
+template<typename T>
+class C_MonContext : public LambdaContext<T> {
+public:
+ C_MonContext(const Monitor* m, T&& f) :
+ LambdaContext<T>(std::forward<T>(f)),
+ mon(m)
+ {}
+ void finish(int r) override {
+ if (mon->is_shutdown())
+ return;
+ LambdaContext<T>::finish(r);
+ }
+private:
+ const Monitor* mon;
+};
#endif
projects / ceph.git / blobdiff