1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2015 Red Hat
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
15 #include <string_view>
17 #include "common/debug.h"
18 #include "common/errno.h"
20 #include "messages/MClientRequestForward.h"
21 #include "messages/MMDSLoadTargets.h"
22 #include "messages/MMDSTableRequest.h"
24 #include "mgr/MgrClient.h"
26 #include "MDSDaemon.h"
28 #include "SnapClient.h"
29 #include "SnapServer.h"
30 #include "MDBalancer.h"
34 #include "mon/MonClient.h"
35 #include "common/HeartbeatMap.h"
36 #include "ScrubStack.h"
41 #define dout_context g_ceph_context
42 #define dout_subsys ceph_subsys_mds
44 #define dout_prefix *_dout << "mds." << whoami << '.' << incarnation << ' '
45 using TOPNSPC::common::cmd_getval
;
46 class C_Flush_Journal
: public MDSInternalContext
{
48 C_Flush_Journal(MDCache
*mdcache
, MDLog
*mdlog
, MDSRank
*mds
,
49 std::ostream
*ss
, Context
*on_finish
)
50 : MDSInternalContext(mds
),
51 mdcache(mdcache
), mdlog(mdlog
), ss(ss
), on_finish(on_finish
),
52 whoami(mds
->whoami
), incarnation(mds
->incarnation
) {
56 assert(ceph_mutex_is_locked(mds
->mds_lock
));
58 dout(20) << __func__
<< dendl
;
60 if (mdcache
->is_readonly()) {
61 dout(5) << __func__
<< ": read-only FS" << dendl
;
66 if (!mds
->is_active()) {
67 dout(5) << __func__
<< ": MDS not active, no-op" << dendl
;
78 dout(20) << __func__
<< dendl
;
80 // I need to seal off the current segment, and then mark all
81 // previous segments for expiry
82 mdlog
->start_new_segment();
84 Context
*ctx
= new LambdaContext([this](int r
) {
85 handle_flush_mdlog(r
);
88 // Flush initially so that all the segments older than our new one
89 // will be elegible for expiry
91 mdlog
->wait_for_safe(new MDSInternalContextWrapper(mds
, ctx
));
94 void handle_flush_mdlog(int r
) {
95 dout(20) << __func__
<< ": r=" << r
<< dendl
;
98 *ss
<< "Error " << r
<< " (" << cpp_strerror(r
) << ") while flushing journal";
107 dout(20) << __func__
<< dendl
;
109 Context
*ctx
= new LambdaContext([this](int r
) {
110 handle_clear_mdlog(r
);
113 // Because we may not be the last wait_for_safe context on MDLog,
114 // and subsequent contexts might wake up in the middle of our
115 // later trim_all and interfere with expiry (by e.g. marking
116 // dirs/dentries dirty on previous log segments), we run a second
117 // wait_for_safe here. See #10368
118 mdlog
->wait_for_safe(new MDSInternalContextWrapper(mds
, ctx
));
121 void handle_clear_mdlog(int r
) {
122 dout(20) << __func__
<< ": r=" << r
<< dendl
;
125 *ss
<< "Error " << r
<< " (" << cpp_strerror(r
) << ") while flushing journal";
134 // Put all the old log segments into expiring or expired state
135 dout(5) << __func__
<< ": beginning segment expiry" << dendl
;
137 int ret
= mdlog
->trim_all();
139 *ss
<< "Error " << ret
<< " (" << cpp_strerror(ret
) << ") while trimming log";
147 void expire_segments() {
148 dout(20) << __func__
<< dendl
;
150 // Attach contexts to wait for all expiring segments to expire
151 MDSGatherBuilder
*expiry_gather
= new MDSGatherBuilder(g_ceph_context
);
153 const auto &expiring_segments
= mdlog
->get_expiring_segments();
154 for (auto p
: expiring_segments
) {
155 p
->wait_for_expiry(expiry_gather
->new_sub());
157 dout(5) << __func__
<< ": waiting for " << expiry_gather
->num_subs_created()
158 << " segments to expire" << dendl
;
160 if (!expiry_gather
->has_subs()) {
162 delete expiry_gather
;
166 Context
*ctx
= new LambdaContext([this](int r
) {
167 handle_expire_segments(r
);
169 expiry_gather
->set_finisher(new MDSInternalContextWrapper(mds
, ctx
));
170 expiry_gather
->activate();
173 void handle_expire_segments(int r
) {
174 dout(20) << __func__
<< ": r=" << r
<< dendl
;
176 ceph_assert(r
== 0); // MDLog is not allowed to raise errors via
181 void trim_segments() {
182 dout(20) << __func__
<< dendl
;
184 Context
*ctx
= new C_OnFinisher(new LambdaContext([this](int) {
185 std::lock_guard
locker(mds
->mds_lock
);
186 trim_expired_segments();
191 void trim_expired_segments() {
192 dout(5) << __func__
<< ": expiry complete, expire_pos/trim_pos is now "
193 << std::hex
<< mdlog
->get_journaler()->get_expire_pos() << "/"
194 << mdlog
->get_journaler()->get_trimmed_pos() << dendl
;
196 // Now everyone I'm interested in is expired
197 mdlog
->trim_expired_segments();
199 dout(5) << __func__
<< ": trim complete, expire_pos/trim_pos is now "
200 << std::hex
<< mdlog
->get_journaler()->get_expire_pos() << "/"
201 << mdlog
->get_journaler()->get_trimmed_pos() << dendl
;
203 write_journal_head();
206 void write_journal_head() {
207 dout(20) << __func__
<< dendl
;
209 Context
*ctx
= new LambdaContext([this](int r
) {
210 std::lock_guard
locker(mds
->mds_lock
);
211 handle_write_head(r
);
213 // Flush the journal header so that readers will start from after
214 // the flushed region
215 mdlog
->get_journaler()->write_head(ctx
);
218 void handle_write_head(int r
) {
220 *ss
<< "Error " << r
<< " (" << cpp_strerror(r
) << ") while writing header";
222 dout(5) << __func__
<< ": write_head complete, all done!" << dendl
;
228 void finish(int r
) override
{
229 dout(20) << __func__
<< ": r=" << r
<< dendl
;
230 on_finish
->complete(r
);
243 class C_Drop_Cache
: public MDSInternalContext
{
245 C_Drop_Cache(Server
*server
, MDCache
*mdcache
, MDLog
*mdlog
,
246 MDSRank
*mds
, uint64_t recall_timeout
,
247 Formatter
*f
, Context
*on_finish
)
248 : MDSInternalContext(mds
),
249 server(server
), mdcache(mdcache
), mdlog(mdlog
),
250 recall_timeout(recall_timeout
), recall_start(mono_clock::now()),
251 f(f
), on_finish(on_finish
),
252 whoami(mds
->whoami
), incarnation(mds
->incarnation
) {
256 // not really a hard requirement here, but lets ensure this in
257 // case we change the logic here.
258 assert(ceph_mutex_is_locked(mds
->mds_lock
));
260 dout(20) << __func__
<< dendl
;
261 f
->open_object_section("result");
262 recall_client_state();
266 // context which completes itself (with -ETIMEDOUT) after a specified
267 // timeout or when explicitly completed, whichever comes first. Note
268 // that the context does not detroy itself after completion -- it
269 // needs to be explicitly freed.
270 class C_ContextTimeout
: public MDSInternalContext
{
272 C_ContextTimeout(MDSRank
*mds
, uint64_t timeout
, Context
*on_finish
)
273 : MDSInternalContext(mds
),
275 on_finish(on_finish
) {
277 ~C_ContextTimeout() {
278 ceph_assert(timer_task
== nullptr);
286 timer_task
= new LambdaContext([this](int) {
287 timer_task
= nullptr;
288 complete(-ETIMEDOUT
);
290 mds
->timer
.add_event_after(timeout
, timer_task
);
293 void finish(int r
) override
{
294 Context
*ctx
= nullptr;
296 std::lock_guard
locker(lock
);
297 std::swap(on_finish
, ctx
);
299 if (ctx
!= nullptr) {
303 void complete(int r
) override
{
304 if (timer_task
!= nullptr) {
305 mds
->timer
.cancel_event(timer_task
);
312 ceph::mutex lock
= ceph::make_mutex("mds::context::timeout");
313 Context
*on_finish
= nullptr;
314 Context
*timer_task
= nullptr;
318 auto [throttled
, count
] = mdcache
->trim(UINT64_MAX
);
320 << (throttled
? " (throttled)" : "")
321 << " trimmed " << count
<< " caps" << dendl
;
322 dentries_trimmed
+= count
;
323 return std::make_pair(throttled
, count
);
326 void recall_client_state() {
327 dout(20) << __func__
<< dendl
;
328 auto now
= mono_clock::now();
329 auto duration
= std::chrono::duration
<double>(now
-recall_start
).count();
331 MDSGatherBuilder
*gather
= new MDSGatherBuilder(g_ceph_context
);
332 auto flags
= Server::RecallFlags::STEADY
|Server::RecallFlags::TRIM
;
333 auto [throttled
, count
] = server
->recall_client_state(gather
, flags
);
335 << (throttled
? " (throttled)" : "")
336 << " recalled " << count
<< " caps" << dendl
;
338 caps_recalled
+= count
;
339 if ((throttled
|| count
> 0) && (recall_timeout
== 0 || duration
< recall_timeout
)) {
340 C_ContextTimeout
*ctx
= new C_ContextTimeout(
341 mds
, 1, new LambdaContext([this](int r
) {
342 recall_client_state();
345 gather
->set_finisher(new MDSInternalContextWrapper(mds
, ctx
));
347 mdlog
->flush(); /* use down-time to incrementally flush log */
348 do_trim(); /* use down-time to incrementally trim cache */
350 if (!gather
->has_subs()) {
352 return handle_recall_client_state(0);
353 } else if (recall_timeout
> 0 && duration
> recall_timeout
) {
354 gather
->set_finisher(new C_MDSInternalNoop
);
356 return handle_recall_client_state(-ETIMEDOUT
);
358 uint64_t remaining
= (recall_timeout
== 0 ? 0 : recall_timeout
-duration
);
359 C_ContextTimeout
*ctx
= new C_ContextTimeout(
360 mds
, remaining
, new LambdaContext([this](int r
) {
361 handle_recall_client_state(r
);
365 gather
->set_finisher(new MDSInternalContextWrapper(mds
, ctx
));
371 void handle_recall_client_state(int r
) {
372 dout(20) << __func__
<< ": r=" << r
<< dendl
;
374 // client recall section
375 f
->open_object_section("client_recall");
376 f
->dump_int("return_code", r
);
377 f
->dump_string("message", cpp_strerror(r
));
378 f
->dump_int("recalled", caps_recalled
);
381 // we can still continue after recall timeout
385 void flush_journal() {
386 dout(20) << __func__
<< dendl
;
388 Context
*ctx
= new LambdaContext([this](int r
) {
389 handle_flush_journal(r
);
392 C_Flush_Journal
*flush_journal
= new C_Flush_Journal(mdcache
, mdlog
, mds
, &ss
, ctx
);
393 flush_journal
->send();
396 void handle_flush_journal(int r
) {
397 dout(20) << __func__
<< ": r=" << r
<< dendl
;
400 cmd_err(f
, ss
.str());
405 // journal flush section
406 f
->open_object_section("flush_journal");
407 f
->dump_int("return_code", r
);
408 f
->dump_string("message", ss
.str());
415 dout(20) << __func__
<< dendl
;
417 auto [throttled
, count
] = do_trim();
418 if (throttled
&& count
> 0) {
419 auto timer
= new LambdaContext([this](int) {
422 mds
->timer
.add_event_after(1.0, timer
);
428 void cache_status() {
429 dout(20) << __func__
<< dendl
;
431 f
->open_object_section("trim_cache");
432 f
->dump_int("trimmed", dentries_trimmed
);
435 // cache status section
436 mdcache
->cache_status(f
);
441 void finish(int r
) override
{
442 dout(20) << __func__
<< ": r=" << r
<< dendl
;
444 auto d
= std::chrono::duration
<double>(mono_clock::now()-recall_start
);
445 f
->dump_float("duration", d
.count());
448 on_finish
->complete(r
);
454 uint64_t recall_timeout
;
455 mono_time recall_start
;
460 std::stringstream ss
;
461 uint64_t caps_recalled
= 0;
462 uint64_t dentries_trimmed
= 0;
468 void cmd_err(Formatter
*f
, std::string_view err
) {
470 f
->open_object_section("result");
471 f
->dump_string("error", err
);
478 ceph::mutex
&mds_lock_
,
479 LogChannelRef
&clog_
,
482 std::unique_ptr
<MDSMap
>& mdsmap_
,
486 Context
*respawn_hook_
,
487 Context
*suicide_hook_
) :
488 cct(msgr
->cct
), mds_lock(mds_lock_
), clog(clog_
),
489 timer(timer_
), mdsmap(mdsmap_
),
490 objecter(new Objecter(g_ceph_context
, msgr
, monc_
, nullptr, 0, 0)),
491 damage_table(whoami_
), sessionmap(this),
492 op_tracker(g_ceph_context
, g_conf()->mds_enable_op_tracker
,
493 g_conf()->osd_num_op_tracker_shard
),
494 progress_thread(this), whoami(whoami_
),
495 purge_queue(g_ceph_context
, whoami_
,
496 mdsmap_
->get_metadata_pool(), objecter
,
497 new LambdaContext([this](int r
) {
498 std::lock_guard
l(mds_lock
);
499 handle_write_error(r
);
504 messenger(msgr
), monc(monc_
), mgrc(mgrc
),
505 respawn_hook(respawn_hook_
),
506 suicide_hook(suicide_hook_
),
507 starttime(mono_clock::now())
509 hb
= g_ceph_context
->get_heartbeat_map()->add_worker("MDSRank", pthread_self());
511 purge_queue
.update_op_limit(*mdsmap
);
513 objecter
->unset_honor_pool_full();
515 finisher
= new Finisher(cct
, "MDSRank", "MR_Finisher");
517 mdcache
= new MDCache(this, purge_queue
);
518 mdlog
= new MDLog(this);
519 balancer
= new MDBalancer(this, messenger
, monc
);
521 scrubstack
= new ScrubStack(mdcache
, clog
, finisher
);
523 inotable
= new InoTable(this);
524 snapserver
= new SnapServer(this, monc
);
525 snapclient
= new SnapClient(this);
527 server
= new Server(this);
528 locker
= new Locker(this, mdcache
);
530 op_tracker
.set_complaint_and_threshold(cct
->_conf
->mds_op_complaint_time
,
531 cct
->_conf
->mds_op_log_threshold
);
532 op_tracker
.set_history_size_and_duration(cct
->_conf
->mds_op_history_size
,
533 cct
->_conf
->mds_op_history_duration
);
535 schedule_update_timer_task();
541 g_ceph_context
->get_heartbeat_map()->remove_worker(hb
);
544 if (scrubstack
) { delete scrubstack
; scrubstack
= NULL
; }
545 if (mdcache
) { delete mdcache
; mdcache
= NULL
; }
546 if (mdlog
) { delete mdlog
; mdlog
= NULL
; }
547 if (balancer
) { delete balancer
; balancer
= NULL
; }
548 if (inotable
) { delete inotable
; inotable
= NULL
; }
549 if (snapserver
) { delete snapserver
; snapserver
= NULL
; }
550 if (snapclient
) { delete snapclient
; snapclient
= NULL
; }
552 if (server
) { delete server
; server
= 0; }
553 if (locker
) { delete locker
; locker
= 0; }
556 g_ceph_context
->get_perfcounters_collection()->remove(logger
);
561 g_ceph_context
->get_perfcounters_collection()->remove(mlogger
);
579 void MDSRankDispatcher::init()
582 messenger
->add_dispatcher_head(objecter
);
589 // Expose the OSDMap (already populated during MDS::init) to anyone
590 // who is interested in it.
593 progress_thread
.create("mds_rank_progr");
600 void MDSRank::update_targets()
602 // get MonMap's idea of my export_targets
603 const set
<mds_rank_t
>& map_targets
= mdsmap
->get_mds_info(get_nodeid()).export_targets
;
605 dout(20) << "updating export targets, currently " << map_targets
.size() << " ranks are targets" << dendl
;
608 set
<mds_rank_t
> new_map_targets
;
610 auto it
= export_targets
.begin();
611 while (it
!= export_targets
.end()) {
612 mds_rank_t rank
= it
->first
;
613 auto &counter
= it
->second
;
614 dout(20) << "export target mds." << rank
<< " is " << counter
<< dendl
;
616 double val
= counter
.get();
618 dout(15) << "export target mds." << rank
<< " is no longer an export target" << dendl
;
619 export_targets
.erase(it
++);
623 if (!map_targets
.count(rank
)) {
624 dout(15) << "export target mds." << rank
<< " not in map's export_targets" << dendl
;
627 new_map_targets
.insert(rank
);
630 if (new_map_targets
.size() < map_targets
.size()) {
631 dout(15) << "export target map holds stale targets, sending update" << dendl
;
636 dout(15) << "updating export_targets, now " << new_map_targets
.size() << " ranks are targets" << dendl
;
637 auto m
= make_message
<MMDSLoadTargets
>(mds_gid_t(monc
->get_global_id()), new_map_targets
);
638 monc
->send_mon_message(m
.detach());
642 void MDSRank::hit_export_target(mds_rank_t rank
, double amount
)
644 double rate
= g_conf()->mds_bal_target_decay
;
646 amount
= 100.0/g_conf()->mds_bal_target_decay
; /* a good default for "i am trying to keep this export_target active" */
648 auto em
= export_targets
.emplace(std::piecewise_construct
, std::forward_as_tuple(rank
), std::forward_as_tuple(DecayRate(rate
)));
649 auto &counter
= em
.first
->second
;
652 dout(15) << "hit export target (new) is " << counter
<< dendl
;
654 dout(15) << "hit export target is " << counter
<< dendl
;
658 class C_MDS_MonCommand
: public MDSInternalContext
{
662 C_MDS_MonCommand(MDSRank
*m
, std::string_view c
)
663 : MDSInternalContext(m
), cmd(c
) {}
664 void finish(int r
) override
{
665 mds
->_mon_command_finish(r
, cmd
, outs
);
669 void MDSRank::_mon_command_finish(int r
, std::string_view cmd
, std::string_view outs
)
672 dout(0) << __func__
<< ": mon command " << cmd
<< " failed with errno " << r
673 << " (" << outs
<< ")" << dendl
;
675 dout(1) << __func__
<< ": mon command " << cmd
<< " succeed" << dendl
;
679 void MDSRank::set_mdsmap_multimds_snaps_allowed()
681 static bool already_sent
= false;
686 ss
<< "{\"prefix\":\"fs set\", \"fs_name\":\"" << mdsmap
->get_fs_name() << "\", ";
687 ss
<< "\"var\":\"allow_multimds_snaps\", \"val\":\"true\", ";
688 ss
<< "\"confirm\":\"--yes-i-am-really-a-mds\"}";
689 std::vector
<std::string
> cmd
= {ss
.str()};
691 dout(0) << __func__
<< ": sending mon command: " << cmd
[0] << dendl
;
693 C_MDS_MonCommand
*fin
= new C_MDS_MonCommand(this, cmd
[0]);
694 monc
->start_mon_command(cmd
, {}, nullptr, &fin
->outs
, new C_IO_Wrapper(this, fin
));
699 void MDSRank::mark_base_recursively_scrubbed(inodeno_t ino
)
701 if (mdsmap
->get_tableserver() == whoami
)
702 snapserver
->mark_base_recursively_scrubbed(ino
);
705 void MDSRankDispatcher::tick()
709 if (beacon
.is_laggy()) {
710 dout(1) << "skipping upkeep work because connection to Monitors appears laggy" << dendl
;
714 check_ops_in_flight();
716 // Wake up thread in case we use to be laggy and have waiting_for_nolaggy
717 // messages to progress.
718 progress_thread
.signal();
720 // make sure mds log flushes, trims periodically
723 // update average session uptime
724 sessionmap
.update_average_session_age();
726 if (is_active() || is_stopping()) {
727 mdlog
->trim(); // NOT during recovery!
731 if (is_cache_trimmable()) {
732 server
->find_idle_sessions();
733 server
->evict_cap_revoke_non_responders();
739 logger
->set(l_mds_subtrees
, mdcache
->num_subtrees());
744 server
->reconnect_tick();
748 mdcache
->find_stale_fragment_freeze();
749 mdcache
->migrator
->find_stale_export_freeze();
751 if (mdsmap
->get_tableserver() == whoami
) {
752 snapserver
->check_osd_map(false);
753 // Filesystem was created by pre-mimic mds. Allow multi-active mds after
754 // all old snapshots are deleted.
755 if (!mdsmap
->allows_multimds_snaps() &&
756 snapserver
->can_allow_multimds_snaps()) {
757 set_mdsmap_multimds_snaps_allowed();
762 if (is_active() || is_stopping()) {
769 if (mdcache
->shutdown_pass()) {
770 uint64_t pq_progress
= 0 ;
771 uint64_t pq_total
= 0;
772 size_t pq_in_flight
= 0;
773 if (!purge_queue
.drain(&pq_progress
, &pq_total
, &pq_in_flight
)) {
774 dout(7) << "shutdown_pass=true, but still waiting for purge queue"
776 // This takes unbounded time, so we must indicate progress
777 // to the administrator: we do it in a slightly imperfect way
778 // by sending periodic (tick frequency) clog messages while
780 clog
->info() << "MDS rank " << whoami
<< " waiting for purge queue ("
781 << std::dec
<< pq_progress
<< "/" << pq_total
<< " " << pq_in_flight
782 << " files purging" << ")";
784 dout(7) << "shutdown_pass=true, finished w/ shutdown, moving to "
785 "down:stopped" << dendl
;
790 dout(7) << "shutdown_pass=false" << dendl
;
794 // Expose ourselves to Beacon to update health indicators
795 beacon
.notify_health(this);
798 void MDSRankDispatcher::shutdown()
800 // It should never be possible for shutdown to get called twice, because
801 // anyone picking up mds_lock checks if stopping is true and drops
803 ceph_assert(stopping
== false);
806 dout(1) << __func__
<< ": shutting down rank " << whoami
<< dendl
;
808 g_conf().remove_observer(this);
812 // MDLog has to shut down before the finisher, because some of its
813 // threads block on IOs that require finisher to complete.
819 purge_queue
.shutdown();
822 finisher
->stop(); // no flushing
825 if (objecter
->initialized
)
826 objecter
->shutdown();
830 op_tracker
.on_shutdown();
832 progress_thread
.shutdown();
834 // release mds_lock for finisher/messenger threads (e.g.
835 // MDSDaemon::ms_handle_reset called from Messenger).
838 // shut down messenger
839 messenger
->shutdown();
843 // Workaround unclean shutdown: HeartbeatMap will assert if
844 // worker is not removed (as we do in ~MDS), but ~MDS is not
845 // always called after suicide.
847 g_ceph_context
->get_heartbeat_map()->remove_worker(hb
);
853 * Helper for simple callbacks that call a void fn with no args.
855 class C_MDS_VoidFn
: public MDSInternalContext
857 typedef void (MDSRank::*fn_ptr
)();
861 C_MDS_VoidFn(MDSRank
*mds_
, fn_ptr fn_
)
862 : MDSInternalContext(mds_
), fn(fn_
)
868 void finish(int r
) override
874 int64_t MDSRank::get_metadata_pool()
876 return mdsmap
->get_metadata_pool();
879 MDSTableClient
*MDSRank::get_table_client(int t
)
882 case TABLE_ANCHOR
: return NULL
;
883 case TABLE_SNAP
: return snapclient
;
884 default: ceph_abort();
888 MDSTableServer
*MDSRank::get_table_server(int t
)
891 case TABLE_ANCHOR
: return NULL
;
892 case TABLE_SNAP
: return snapserver
;
893 default: ceph_abort();
897 void MDSRank::suicide()
900 suicide_hook
->complete(0);
905 void MDSRank::respawn()
908 respawn_hook
->complete(0);
913 void MDSRank::damaged()
915 ceph_assert(whoami
!= MDS_RANK_NONE
);
916 ceph_assert(ceph_mutex_is_locked_by_me(mds_lock
));
918 beacon
.set_want_state(*mdsmap
, MDSMap::STATE_DAMAGED
);
919 monc
->flush_log(); // Flush any clog error from before we were called
920 beacon
.notify_health(this); // Include latest status in our swan song
921 beacon
.send_and_wait(g_conf()->mds_mon_shutdown_timeout
);
923 // It's okay if we timed out and the mon didn't get our beacon, because
924 // another daemon (or ourselves after respawn) will eventually take the
925 // rank and report DAMAGED again when it hits same problem we did.
927 respawn(); // Respawn into standby in case mon has other work for us
930 void MDSRank::damaged_unlocked()
932 std::lock_guard
l(mds_lock
);
936 void MDSRank::handle_write_error(int err
)
938 if (err
== -EBLACKLISTED
) {
939 derr
<< "we have been blacklisted (fenced), respawning..." << dendl
;
944 if (g_conf()->mds_action_on_write_error
>= 2) {
945 derr
<< "unhandled write error " << cpp_strerror(err
) << ", suicide..." << dendl
;
947 } else if (g_conf()->mds_action_on_write_error
== 1) {
948 derr
<< "unhandled write error " << cpp_strerror(err
) << ", force readonly..." << dendl
;
949 mdcache
->force_readonly();
952 derr
<< "unhandled write error " << cpp_strerror(err
) << ", ignore..." << dendl
;
956 void *MDSRank::ProgressThread::entry()
958 std::unique_lock
l(mds
->mds_lock
);
960 cond
.wait(l
, [this] {
961 return (mds
->stopping
||
962 !mds
->finished_queue
.empty() ||
963 (!mds
->waiting_for_nolaggy
.empty() && !mds
->beacon
.is_laggy()));
970 mds
->_advance_queues();
977 void MDSRank::ProgressThread::shutdown()
979 ceph_assert(ceph_mutex_is_locked_by_me(mds
->mds_lock
));
980 ceph_assert(mds
->stopping
);
983 // Stopping is set, we will fall out of our main loop naturally
985 // Kick the thread to notice mds->stopping, and join it
987 mds
->mds_lock
.unlock();
990 mds
->mds_lock
.lock();
994 bool MDSRankDispatcher::ms_dispatch(const cref_t
<Message
> &m
)
996 if (m
->get_source().is_client()) {
997 Session
*session
= static_cast<Session
*>(m
->get_connection()->get_priv().get());
999 session
->last_seen
= Session::clock::now();
1002 inc_dispatch_depth();
1003 bool ret
= _dispatch(m
, true);
1004 dec_dispatch_depth();
1008 bool MDSRank::_dispatch(const cref_t
<Message
> &m
, bool new_msg
)
1010 if (is_stale_message(m
)) {
1014 if (beacon
.is_laggy()) {
1015 dout(5) << " laggy, deferring " << *m
<< dendl
;
1016 waiting_for_nolaggy
.push_back(m
);
1017 } else if (new_msg
&& !waiting_for_nolaggy
.empty()) {
1018 dout(5) << " there are deferred messages, deferring " << *m
<< dendl
;
1019 waiting_for_nolaggy
.push_back(m
);
1021 if (!handle_deferrable_message(m
)) {
1028 if (dispatch_depth
> 1)
1031 // finish any triggered contexts
1034 if (beacon
.is_laggy()) {
1035 // We've gone laggy during dispatch, don't do any
1036 // more housekeeping
1040 // hack: thrash exports
1041 static utime_t start
;
1042 utime_t now
= ceph_clock_now();
1043 if (start
== utime_t())
1045 /*double el = now - start;
1048 for (int i
=0; i
<g_conf()->mds_thrash_exports
; i
++) {
1050 if (!is_active()) break;
1051 mdsmap
->get_mds_set(s
, MDSMap::STATE_ACTIVE
);
1052 if (s
.size() < 2 || CInode::count() < 10)
1053 break; // need peers for this to work.
1054 if (mdcache
->migrator
->get_num_exporting() > g_conf()->mds_thrash_exports
* 5 ||
1055 mdcache
->migrator
->get_export_queue_size() > g_conf()->mds_thrash_exports
* 10)
1058 dout(7) << "mds thrashing exports pass " << (i
+1) << "/" << g_conf()->mds_thrash_exports
<< dendl
;
1060 // pick a random dir inode
1061 CInode
*in
= mdcache
->hack_pick_random_inode();
1063 auto&& ls
= in
->get_dirfrags();
1064 if (!ls
.empty()) { // must be an open dir.
1065 const auto& dir
= ls
[rand() % ls
.size()];
1066 if (!dir
->get_parent_dir()) continue; // must be linked.
1067 if (!dir
->is_auth()) continue; // must be auth.
1071 int k
= rand() % s
.size();
1072 set
<mds_rank_t
>::iterator p
= s
.begin();
1075 } while (dest
== whoami
);
1076 mdcache
->migrator
->export_dir_nicely(dir
,dest
);
1079 // hack: thrash fragments
1080 for (int i
=0; i
<g_conf()->mds_thrash_fragments
; i
++) {
1081 if (!is_active()) break;
1082 if (mdcache
->get_num_fragmenting_dirs() > 5 * g_conf()->mds_thrash_fragments
) break;
1083 dout(7) << "mds thrashing fragments pass " << (i
+1) << "/" << g_conf()->mds_thrash_fragments
<< dendl
;
1085 // pick a random dir inode
1086 CInode
*in
= mdcache
->hack_pick_random_inode();
1088 auto&& ls
= in
->get_dirfrags();
1089 if (ls
.empty()) continue; // must be an open dir.
1090 CDir
*dir
= ls
.front();
1091 if (!dir
->get_parent_dir()) continue; // must be linked.
1092 if (!dir
->is_auth()) continue; // must be auth.
1093 frag_t fg
= dir
->get_frag();
1094 if ((fg
== frag_t() || (rand() % (1 << fg
.bits()) == 0))) {
1095 mdcache
->split_dir(dir
, 1);
1097 balancer
->queue_merge(dir
);
1101 // hack: force hash root?
1104 mdcache->get_root() &&
1105 mdcache->get_root()->dir &&
1106 !(mdcache->get_root()->dir->is_hashed() ||
1107 mdcache->get_root()->dir->is_hashing())) {
1108 dout(0) << "hashing root" << dendl;
1109 mdcache->migrator->hash_dir(mdcache->get_root()->dir);
1117 void MDSRank::update_mlogger()
1120 mlogger
->set(l_mdm_ino
, CInode::count());
1121 mlogger
->set(l_mdm_dir
, CDir::count());
1122 mlogger
->set(l_mdm_dn
, CDentry::count());
1123 mlogger
->set(l_mdm_cap
, Capability::count());
1124 mlogger
->set(l_mdm_inoa
, CInode::increments());
1125 mlogger
->set(l_mdm_inos
, CInode::decrements());
1126 mlogger
->set(l_mdm_dira
, CDir::increments());
1127 mlogger
->set(l_mdm_dirs
, CDir::decrements());
1128 mlogger
->set(l_mdm_dna
, CDentry::increments());
1129 mlogger
->set(l_mdm_dns
, CDentry::decrements());
1130 mlogger
->set(l_mdm_capa
, Capability::increments());
1131 mlogger
->set(l_mdm_caps
, Capability::decrements());
1136 * lower priority messages we defer if we seem laggy
1138 bool MDSRank::handle_deferrable_message(const cref_t
<Message
> &m
)
1140 int port
= m
->get_type() & 0xff00;
1143 case MDS_PORT_CACHE
:
1144 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS
);
1145 mdcache
->dispatch(m
);
1148 case MDS_PORT_MIGRATOR
:
1149 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS
);
1150 mdcache
->migrator
->dispatch(m
);
1154 switch (m
->get_type()) {
1156 case CEPH_MSG_CLIENT_SESSION
:
1157 case CEPH_MSG_CLIENT_RECONNECT
:
1158 case CEPH_MSG_CLIENT_RECLAIM
:
1159 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_CLIENT
);
1161 case CEPH_MSG_CLIENT_REQUEST
:
1162 server
->dispatch(m
);
1164 case MSG_MDS_SLAVE_REQUEST
:
1165 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS
);
1166 server
->dispatch(m
);
1169 case MSG_MDS_HEARTBEAT
:
1170 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS
);
1171 balancer
->proc_message(m
);
1174 case MSG_MDS_TABLE_REQUEST
:
1175 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS
);
1177 const cref_t
<MMDSTableRequest
> &req
= ref_cast
<MMDSTableRequest
>(m
);
1179 MDSTableClient
*client
= get_table_client(req
->table
);
1180 client
->handle_request(req
);
1182 MDSTableServer
*server
= get_table_server(req
->table
);
1183 server
->handle_request(req
);
1189 case MSG_MDS_INODEFILECAPS
:
1190 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS
);
1191 locker
->dispatch(m
);
1194 case CEPH_MSG_CLIENT_CAPS
:
1195 case CEPH_MSG_CLIENT_CAPRELEASE
:
1196 case CEPH_MSG_CLIENT_LEASE
:
1197 ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_CLIENT
);
1198 locker
->dispatch(m
);
1210 * Advance finished_queue and waiting_for_nolaggy.
1212 * Usually drain both queues, but may not drain waiting_for_nolaggy
1213 * if beacon is currently laggy.
1215 void MDSRank::_advance_queues()
1217 ceph_assert(ceph_mutex_is_locked_by_me(mds_lock
));
1219 if (!finished_queue
.empty()) {
1220 dout(7) << "mds has " << finished_queue
.size() << " queued contexts" << dendl
;
1221 while (!finished_queue
.empty()) {
1222 auto fin
= finished_queue
.front();
1223 finished_queue
.pop_front();
1225 dout(10) << " finish " << fin
<< dendl
;
1232 while (!waiting_for_nolaggy
.empty()) {
1233 // stop if we're laggy now!
1234 if (beacon
.is_laggy())
1237 cref_t
<Message
> old
= waiting_for_nolaggy
.front();
1238 waiting_for_nolaggy
.pop_front();
1240 if (!is_stale_message(old
)) {
1241 dout(7) << " processing laggy deferred " << *old
<< dendl
;
1242 if (!handle_deferrable_message(old
)) {
1243 dout(0) << "unrecognized message " << *old
<< dendl
;
1252 * Call this when you take mds_lock, or periodically if you're going to
1253 * hold the lock for a long time (e.g. iterating over clients/inodes)
1255 void MDSRank::heartbeat_reset()
1257 // Any thread might jump into mds_lock and call us immediately
1258 // after a call to suicide() completes, in which case MDSRank::hb
1259 // has been freed and we are a no-op.
1261 ceph_assert(stopping
);
1265 // NB not enabling suicide grace, because the mon takes care of killing us
1266 // (by blacklisting us) when we fail to send beacons, and it's simpler to
1267 // only have one way of dying.
1268 auto grace
= g_conf().get_val
<double>("mds_heartbeat_grace");
1269 g_ceph_context
->get_heartbeat_map()->reset_timeout(hb
, grace
, 0);
1272 bool MDSRank::is_stale_message(const cref_t
<Message
> &m
) const
1275 if (m
->get_source().is_mds()) {
1276 mds_rank_t from
= mds_rank_t(m
->get_source().num());
1278 if (mdsmap
->is_down(from
)) {
1281 // FIXME: this is a convoluted check. we should be maintaining a nice
1282 // clean map of current ConnectionRefs for current mdses!!!
1283 auto c
= messenger
->connect_to(CEPH_ENTITY_TYPE_MDS
,
1284 mdsmap
->get_addrs(from
));
1285 if (c
!= m
->get_connection()) {
1287 dout(5) << " mds." << from
<< " should be " << c
<< " "
1288 << c
->get_peer_addrs() << " but this message is "
1289 << m
->get_connection() << " " << m
->get_source_addrs()
1295 if (m
->get_type() == CEPH_MSG_MDS_MAP
) {
1296 dout(5) << "got " << *m
<< " from old/bad/imposter mds " << m
->get_source()
1297 << ", but it's an mdsmap, looking at it" << dendl
;
1298 } else if (m
->get_type() == MSG_MDS_CACHEEXPIRE
&&
1299 mdsmap
->get_addrs(from
) == m
->get_source_addrs()) {
1300 dout(5) << "got " << *m
<< " from down mds " << m
->get_source()
1301 << ", but it's a cache_expire, looking at it" << dendl
;
1303 dout(5) << "got " << *m
<< " from down/old/bad/imposter mds " << m
->get_source()
1304 << ", dropping" << dendl
;
1312 Session
*MDSRank::get_session(const cref_t
<Message
> &m
)
1315 auto session
= static_cast<Session
*>(m
->get_connection()->get_priv().get());
1317 dout(20) << "get_session have " << session
<< " " << session
->info
.inst
1318 << " state " << session
->get_state_name() << dendl
;
1319 // Check if we've imported an open session since (new sessions start closed)
1320 if (session
->is_closed()) {
1321 Session
*imported_session
= sessionmap
.get_session(session
->info
.inst
.name
);
1322 if (imported_session
&& imported_session
!= session
) {
1323 dout(10) << __func__
<< " replacing connection bootstrap session "
1324 << session
<< " with imported session " << imported_session
1326 imported_session
->info
.auth_name
= session
->info
.auth_name
;
1327 //assert(session->info.auth_name == imported_session->info.auth_name);
1328 ceph_assert(session
->info
.inst
== imported_session
->info
.inst
);
1329 imported_session
->set_connection(session
->get_connection().get());
1330 // send out any queued messages
1331 while (!session
->preopen_out_queue
.empty()) {
1332 imported_session
->get_connection()->send_message2(std::move(session
->preopen_out_queue
.front()));
1333 session
->preopen_out_queue
.pop_front();
1335 imported_session
->auth_caps
= session
->auth_caps
;
1336 imported_session
->last_seen
= session
->last_seen
;
1337 ceph_assert(session
->get_nref() == 1);
1338 imported_session
->get_connection()->set_priv(imported_session
->get());
1339 session
= imported_session
;
1343 dout(20) << "get_session dne for " << m
->get_source_inst() << dendl
;
1348 void MDSRank::send_message(const ref_t
<Message
>& m
, const ConnectionRef
& c
)
1351 c
->send_message2(m
);
1355 void MDSRank::send_message_mds(const ref_t
<Message
>& m
, mds_rank_t mds
)
1357 if (!mdsmap
->is_up(mds
)) {
1358 dout(10) << "send_message_mds mds." << mds
<< " not up, dropping " << *m
<< dendl
;
1362 // send mdsmap first?
1363 if (mds
!= whoami
&& peer_mdsmap_epoch
[mds
] < mdsmap
->get_epoch()) {
1364 auto _m
= make_message
<MMDSMap
>(monc
->get_fsid(), *mdsmap
);
1365 messenger
->send_to_mds(_m
.detach(), mdsmap
->get_addrs(mds
));
1366 peer_mdsmap_epoch
[mds
] = mdsmap
->get_epoch();
1370 messenger
->send_to_mds(ref_t
<Message
>(m
).detach(), mdsmap
->get_addrs(mds
));
1373 void MDSRank::forward_message_mds(const cref_t
<MClientRequest
>& m
, mds_rank_t mds
)
1375 ceph_assert(mds
!= whoami
);
1378 * don't actually forward if non-idempotent!
1379 * client has to do it. although the MDS will ignore duplicate requests,
1380 * the affected metadata may migrate, in which case the new authority
1381 * won't have the metareq_id in the completed request map.
1383 // NEW: always make the client resend!
1384 bool client_must_resend
= true; //!creq->can_forward();
1386 // tell the client where it should go
1387 auto session
= get_session(m
);
1388 auto f
= make_message
<MClientRequestForward
>(m
->get_tid(), mds
, m
->get_num_fwd()+1, client_must_resend
);
1389 send_message_client(f
, session
);
1392 void MDSRank::send_message_client_counted(const ref_t
<Message
>& m
, client_t client
)
1394 Session
*session
= sessionmap
.get_session(entity_name_t::CLIENT(client
.v
));
1396 send_message_client_counted(m
, session
);
1398 dout(10) << "send_message_client_counted no session for client." << client
<< " " << *m
<< dendl
;
1402 void MDSRank::send_message_client_counted(const ref_t
<Message
>& m
, const ConnectionRef
& connection
)
1405 auto session
= static_cast<Session
*>(connection
->get_priv().get());
1407 send_message_client_counted(m
, session
);
1409 dout(10) << "send_message_client_counted has no session for " << m
->get_source_inst() << dendl
;
1410 // another Connection took over the Session
1414 void MDSRank::send_message_client_counted(const ref_t
<Message
>& m
, Session
* session
)
1416 version_t seq
= session
->inc_push_seq();
1417 dout(10) << "send_message_client_counted " << session
->info
.inst
.name
<< " seq "
1418 << seq
<< " " << *m
<< dendl
;
1419 if (session
->get_connection()) {
1420 session
->get_connection()->send_message2(m
);
1422 session
->preopen_out_queue
.push_back(m
);
1426 void MDSRank::send_message_client(const ref_t
<Message
>& m
, Session
* session
)
1428 dout(10) << "send_message_client " << session
->info
.inst
<< " " << *m
<< dendl
;
1429 if (session
->get_connection()) {
1430 session
->get_connection()->send_message2(m
);
1432 session
->preopen_out_queue
.push_back(m
);
1437 * This is used whenever a RADOS operation has been cancelled
1438 * or a RADOS client has been blacklisted, to cause the MDS and
1439 * any clients to wait for this OSD epoch before using any new caps.
1441 * See doc/cephfs/eviction
1443 void MDSRank::set_osd_epoch_barrier(epoch_t e
)
1445 dout(4) << __func__
<< ": epoch=" << e
<< dendl
;
1446 osd_epoch_barrier
= e
;
1449 void MDSRank::retry_dispatch(const cref_t
<Message
> &m
)
1451 inc_dispatch_depth();
1452 _dispatch(m
, false);
1453 dec_dispatch_depth();
1456 double MDSRank::get_dispatch_queue_max_age(utime_t now
) const
1458 return messenger
->get_dispatch_queue_max_age(now
);
1461 bool MDSRank::is_daemon_stopping() const
1466 void MDSRank::request_state(MDSMap::DaemonState s
)
1468 dout(3) << "request_state " << ceph_mds_state_name(s
) << dendl
;
1469 beacon
.set_want_state(*mdsmap
, s
);
1474 class C_MDS_BootStart
: public MDSInternalContext
{
1475 MDSRank::BootStep nextstep
;
1477 C_MDS_BootStart(MDSRank
*m
, MDSRank::BootStep n
)
1478 : MDSInternalContext(m
), nextstep(n
) {}
1479 void finish(int r
) override
{
1480 mds
->boot_start(nextstep
, r
);
1485 void MDSRank::boot_start(BootStep step
, int r
)
1487 // Handle errors from previous step
1489 if (is_standby_replay() && (r
== -EAGAIN
)) {
1490 dout(0) << "boot_start encountered an error EAGAIN"
1491 << ", respawning since we fell behind journal" << dendl
;
1493 } else if (r
== -EINVAL
|| r
== -ENOENT
) {
1494 // Invalid or absent data, indicates damaged on-disk structures
1495 clog
->error() << "Error loading MDS rank " << whoami
<< ": "
1498 ceph_assert(r
== 0); // Unreachable, damaged() calls respawn()
1499 } else if (r
== -EROFS
) {
1500 dout(0) << "boot error forcing transition to read-only; MDS will try to continue" << dendl
;
1502 // Completely unexpected error, give up and die
1503 dout(0) << "boot_start encountered an error, failing" << dendl
;
1509 ceph_assert(is_starting() || is_any_replay());
1512 case MDS_BOOT_INITIAL
:
1514 mdcache
->init_layouts();
1516 MDSGatherBuilder
gather(g_ceph_context
,
1517 new C_MDS_BootStart(this, MDS_BOOT_OPEN_ROOT
));
1518 dout(2) << "Booting: " << step
<< ": opening inotable" << dendl
;
1519 inotable
->set_rank(whoami
);
1520 inotable
->load(gather
.new_sub());
1522 dout(2) << "Booting: " << step
<< ": opening sessionmap" << dendl
;
1523 sessionmap
.set_rank(whoami
);
1524 sessionmap
.load(gather
.new_sub());
1526 dout(2) << "Booting: " << step
<< ": opening mds log" << dendl
;
1527 mdlog
->open(gather
.new_sub());
1529 if (is_starting()) {
1530 dout(2) << "Booting: " << step
<< ": opening purge queue" << dendl
;
1531 purge_queue
.open(new C_IO_Wrapper(this, gather
.new_sub()));
1532 } else if (!standby_replaying
) {
1533 dout(2) << "Booting: " << step
<< ": opening purge queue (async)" << dendl
;
1534 purge_queue
.open(NULL
);
1535 dout(2) << "Booting: " << step
<< ": loading open file table (async)" << dendl
;
1536 mdcache
->open_file_table
.load(nullptr);
1539 if (mdsmap
->get_tableserver() == whoami
) {
1540 dout(2) << "Booting: " << step
<< ": opening snap table" << dendl
;
1541 snapserver
->set_rank(whoami
);
1542 snapserver
->load(gather
.new_sub());
1548 case MDS_BOOT_OPEN_ROOT
:
1550 dout(2) << "Booting: " << step
<< ": loading/discovering base inodes" << dendl
;
1552 MDSGatherBuilder
gather(g_ceph_context
,
1553 new C_MDS_BootStart(this, MDS_BOOT_PREPARE_LOG
));
1555 if (is_starting()) {
1556 // load mydir frag for the first log segment (creating subtree map)
1557 mdcache
->open_mydir_frag(gather
.new_sub());
1559 mdcache
->open_mydir_inode(gather
.new_sub());
1562 mdcache
->create_global_snaprealm();
1564 if (whoami
== mdsmap
->get_root()) { // load root inode off disk if we are auth
1565 mdcache
->open_root_inode(gather
.new_sub());
1566 } else if (is_any_replay()) {
1567 // replay. make up fake root inode to start with
1568 mdcache
->create_root_inode();
1573 case MDS_BOOT_PREPARE_LOG
:
1574 if (is_any_replay()) {
1575 dout(2) << "Booting: " << step
<< ": replaying mds log" << dendl
;
1576 MDSGatherBuilder
gather(g_ceph_context
,
1577 new C_MDS_BootStart(this, MDS_BOOT_REPLAY_DONE
));
1579 if (!standby_replaying
) {
1580 dout(2) << "Booting: " << step
<< ": waiting for purge queue recovered" << dendl
;
1581 purge_queue
.wait_for_recovery(new C_IO_Wrapper(this, gather
.new_sub()));
1584 mdlog
->replay(gather
.new_sub());
1587 dout(2) << "Booting: " << step
<< ": positioning at end of old mds log" << dendl
;
1592 case MDS_BOOT_REPLAY_DONE
:
1593 ceph_assert(is_any_replay());
1595 // Sessiontable and inotable should be in sync after replay, validate
1596 // that they are consistent.
1597 validate_sessions();
1604 void MDSRank::validate_sessions()
1606 ceph_assert(ceph_mutex_is_locked_by_me(mds_lock
));
1609 // Identify any sessions which have state inconsistent with other,
1610 // after they have been loaded from rados during startup.
1611 // Mitigate bugs like: http://tracker.ceph.com/issues/16842
1612 for (const auto &i
: sessionmap
.get_sessions()) {
1613 Session
*session
= i
.second
;
1614 interval_set
<inodeno_t
> badones
;
1615 if (inotable
->intersects_free(session
->info
.prealloc_inos
, &badones
)) {
1616 clog
->error() << "client " << *session
1617 << "loaded with preallocated inodes that are inconsistent with inotable";
1628 void MDSRank::starting_done()
1630 dout(3) << "starting_done" << dendl
;
1631 ceph_assert(is_starting());
1632 request_state(MDSMap::STATE_ACTIVE
);
1634 mdlog
->start_new_segment();
1636 // sync snaptable cache
1637 snapclient
->sync(new C_MDSInternalNoop
);
1641 void MDSRank::calc_recovery_set()
1643 // initialize gather sets
1645 mdsmap
->get_recovery_mds_set(rs
);
1647 mdcache
->set_recovery_set(rs
);
1649 dout(1) << " recovery set is " << rs
<< dendl
;
1653 void MDSRank::replay_start()
1655 dout(1) << "replay_start" << dendl
;
1657 if (is_standby_replay())
1658 standby_replaying
= true;
1660 calc_recovery_set();
1662 // Check if we need to wait for a newer OSD map before starting
1663 Context
*fin
= new C_IO_Wrapper(this, new C_MDS_BootStart(this, MDS_BOOT_INITIAL
));
1664 bool const ready
= objecter
->wait_for_map(
1665 mdsmap
->get_last_failure_osd_epoch(),
1672 dout(1) << " waiting for osdmap " << mdsmap
->get_last_failure_osd_epoch()
1673 << " (which blacklists prior instance)" << dendl
;
1678 class MDSRank::C_MDS_StandbyReplayRestartFinish
: public MDSIOContext
{
1679 uint64_t old_read_pos
;
1681 C_MDS_StandbyReplayRestartFinish(MDSRank
*mds_
, uint64_t old_read_pos_
) :
1682 MDSIOContext(mds_
), old_read_pos(old_read_pos_
) {}
1683 void finish(int r
) override
{
1684 mds
->_standby_replay_restart_finish(r
, old_read_pos
);
1686 void print(ostream
& out
) const override
{
1687 out
<< "standby_replay_restart";
1691 void MDSRank::_standby_replay_restart_finish(int r
, uint64_t old_read_pos
)
1693 if (old_read_pos
< mdlog
->get_journaler()->get_trimmed_pos()) {
1694 dout(0) << "standby MDS fell behind active MDS journal's expire_pos, restarting" << dendl
;
1695 respawn(); /* we're too far back, and this is easier than
1696 trying to reset everything in the cache, etc */
1698 mdlog
->standby_trim_segments();
1699 boot_start(MDS_BOOT_PREPARE_LOG
, r
);
1703 class MDSRank::C_MDS_StandbyReplayRestart
: public MDSInternalContext
{
1705 explicit C_MDS_StandbyReplayRestart(MDSRank
*m
) : MDSInternalContext(m
) {}
1706 void finish(int r
) override
{
1708 mds
->standby_replay_restart();
1712 void MDSRank::standby_replay_restart()
1714 if (standby_replaying
) {
1715 /* Go around for another pass of replaying in standby */
1716 dout(5) << "Restarting replay as standby-replay" << dendl
;
1717 mdlog
->get_journaler()->reread_head_and_probe(
1718 new C_MDS_StandbyReplayRestartFinish(
1720 mdlog
->get_journaler()->get_read_pos()));
1722 /* We are transitioning out of standby: wait for OSD map update
1723 before making final pass */
1724 dout(1) << "standby_replay_restart (final takeover pass)" << dendl
;
1725 Context
*fin
= new C_IO_Wrapper(this, new C_MDS_StandbyReplayRestart(this));
1726 bool ready
= objecter
->wait_for_map(mdsmap
->get_last_failure_osd_epoch(), fin
);
1729 mdlog
->get_journaler()->reread_head_and_probe(
1730 new C_MDS_StandbyReplayRestartFinish(
1732 mdlog
->get_journaler()->get_read_pos()));
1734 dout(1) << " opening purge_queue (async)" << dendl
;
1735 purge_queue
.open(NULL
);
1736 dout(1) << " opening open_file_table (async)" << dendl
;
1737 mdcache
->open_file_table
.load(nullptr);
1739 dout(1) << " waiting for osdmap " << mdsmap
->get_last_failure_osd_epoch()
1740 << " (which blacklists prior instance)" << dendl
;
1745 void MDSRank::replay_done()
1747 if (!standby_replaying
) {
1748 dout(1) << "Finished replaying journal" << dendl
;
1750 dout(5) << "Finished replaying journal as standby-replay" << dendl
;
1753 if (is_standby_replay()) {
1754 // The replay was done in standby state, and we are still in that state
1755 ceph_assert(standby_replaying
);
1756 dout(10) << "setting replay timer" << dendl
;
1757 timer
.add_event_after(g_conf()->mds_replay_interval
,
1758 new C_MDS_StandbyReplayRestart(this));
1760 } else if (standby_replaying
) {
1761 // The replay was done in standby state, we have now _left_ that state
1762 dout(10) << " last replay pass was as a standby; making final pass" << dendl
;
1763 standby_replaying
= false;
1764 standby_replay_restart();
1767 // Replay is complete, journal read should be up to date
1768 ceph_assert(mdlog
->get_journaler()->get_read_pos() == mdlog
->get_journaler()->get_write_pos());
1769 ceph_assert(!is_standby_replay());
1771 // Reformat and come back here
1772 if (mdlog
->get_journaler()->get_stream_format() < g_conf()->mds_journal_format
) {
1773 dout(4) << "reformatting journal on standby-replay->replay transition" << dendl
;
1774 mdlog
->reopen(new C_MDS_BootStart(this, MDS_BOOT_REPLAY_DONE
));
1779 dout(1) << "making mds journal writeable" << dendl
;
1780 mdlog
->get_journaler()->set_writeable();
1781 mdlog
->get_journaler()->trim_tail();
1783 if (mdsmap
->get_tableserver() == whoami
&&
1784 snapserver
->upgrade_format()) {
1785 dout(1) << "upgrading snaptable format" << dendl
;
1786 snapserver
->save(new C_MDSInternalNoop
);
1789 if (g_conf()->mds_wipe_sessions
) {
1790 dout(1) << "wiping out client sessions" << dendl
;
1792 sessionmap
.save(new C_MDSInternalNoop
);
1794 if (g_conf()->mds_wipe_ino_prealloc
) {
1795 dout(1) << "wiping out ino prealloc from sessions" << dendl
;
1796 sessionmap
.wipe_ino_prealloc();
1797 sessionmap
.save(new C_MDSInternalNoop
);
1799 if (g_conf()->mds_skip_ino
) {
1800 inodeno_t i
= g_conf()->mds_skip_ino
;
1801 dout(1) << "skipping " << i
<< " inodes" << dendl
;
1802 inotable
->skip_inos(i
);
1803 inotable
->save(new C_MDSInternalNoop
);
1806 if (mdsmap
->get_num_in_mds() == 1 &&
1807 mdsmap
->get_num_failed_mds() == 0) { // just me!
1808 dout(2) << "i am alone, moving to state reconnect" << dendl
;
1809 request_state(MDSMap::STATE_RECONNECT
);
1810 // sync snaptable cache
1811 snapclient
->sync(new C_MDSInternalNoop
);
1813 dout(2) << "i am not alone, moving to state resolve" << dendl
;
1814 request_state(MDSMap::STATE_RESOLVE
);
1818 void MDSRank::reopen_log()
1820 dout(1) << "reopen_log" << dendl
;
1821 mdcache
->rollback_uncommitted_fragments();
1824 void MDSRank::resolve_start()
1826 dout(1) << "resolve_start" << dendl
;
1830 mdcache
->resolve_start(new C_MDS_VoidFn(this, &MDSRank::resolve_done
));
1831 finish_contexts(g_ceph_context
, waiting_for_resolve
);
1834 void MDSRank::resolve_done()
1836 dout(1) << "resolve_done" << dendl
;
1837 request_state(MDSMap::STATE_RECONNECT
);
1838 // sync snaptable cache
1839 snapclient
->sync(new C_MDSInternalNoop
);
1842 void MDSRank::reconnect_start()
1844 dout(1) << "reconnect_start" << dendl
;
1846 if (last_state
== MDSMap::STATE_REPLAY
) {
1850 // Drop any blacklisted clients from the SessionMap before going
1851 // into reconnect, so that we don't wait for them.
1852 objecter
->enable_blacklist_events();
1853 std::set
<entity_addr_t
> blacklist
;
1855 objecter
->with_osdmap([&blacklist
, &epoch
](const OSDMap
& o
) {
1856 o
.get_blacklist(&blacklist
);
1857 epoch
= o
.get_epoch();
1859 auto killed
= server
->apply_blacklist(blacklist
);
1860 dout(4) << "reconnect_start: killed " << killed
<< " blacklisted sessions ("
1861 << blacklist
.size() << " blacklist entries, "
1862 << sessionmap
.get_sessions().size() << ")" << dendl
;
1864 set_osd_epoch_barrier(epoch
);
1867 server
->reconnect_clients(new C_MDS_VoidFn(this, &MDSRank::reconnect_done
));
1868 finish_contexts(g_ceph_context
, waiting_for_reconnect
);
1870 void MDSRank::reconnect_done()
1872 dout(1) << "reconnect_done" << dendl
;
1873 request_state(MDSMap::STATE_REJOIN
); // move to rejoin state
1876 void MDSRank::rejoin_joint_start()
1878 dout(1) << "rejoin_joint_start" << dendl
;
1879 mdcache
->rejoin_send_rejoins();
1881 void MDSRank::rejoin_start()
1883 dout(1) << "rejoin_start" << dendl
;
1884 mdcache
->rejoin_start(new C_MDS_VoidFn(this, &MDSRank::rejoin_done
));
1885 finish_contexts(g_ceph_context
, waiting_for_rejoin
);
1887 void MDSRank::rejoin_done()
1889 dout(1) << "rejoin_done" << dendl
;
1890 mdcache
->show_subtrees();
1891 mdcache
->show_cache();
1893 // funny case: is our cache empty? no subtrees?
1894 if (!mdcache
->is_subtrees()) {
1896 // The root should always have a subtree!
1897 clog
->error() << "No subtrees found for root MDS rank!";
1899 ceph_assert(mdcache
->is_subtrees());
1901 dout(1) << " empty cache, no subtrees, leaving cluster" << dendl
;
1902 request_state(MDSMap::STATE_STOPPED
);
1907 if (replay_queue
.empty() && !server
->get_num_pending_reclaim()) {
1908 request_state(MDSMap::STATE_ACTIVE
);
1910 replaying_requests_done
= replay_queue
.empty();
1911 request_state(MDSMap::STATE_CLIENTREPLAY
);
1915 void MDSRank::clientreplay_start()
1917 dout(1) << "clientreplay_start" << dendl
;
1918 finish_contexts(g_ceph_context
, waiting_for_replay
); // kick waiters
1919 mdcache
->start_files_to_recover();
1923 bool MDSRank::queue_one_replay()
1925 if (!replay_queue
.empty()) {
1926 queue_waiter(replay_queue
.front());
1927 replay_queue
.pop_front();
1930 if (!replaying_requests_done
) {
1931 replaying_requests_done
= true;
1934 maybe_clientreplay_done();
1938 void MDSRank::maybe_clientreplay_done()
1940 if (is_clientreplay() && get_want_state() == MDSMap::STATE_CLIENTREPLAY
) {
1942 // don't go to active if there are session waiting for being reclaimed
1943 if (replaying_requests_done
&& !server
->get_num_pending_reclaim()) {
1944 mdlog
->wait_for_safe(new C_MDS_VoidFn(this, &MDSRank::clientreplay_done
));
1948 dout(1) << " still have " << replay_queue
.size() + (int)!replaying_requests_done
1949 << " requests need to be replayed, " << server
->get_num_pending_reclaim()
1950 << " sessions need to be reclaimed" << dendl
;
1954 void MDSRank::clientreplay_done()
1956 dout(1) << "clientreplay_done" << dendl
;
1957 request_state(MDSMap::STATE_ACTIVE
);
1960 void MDSRank::active_start()
1962 dout(1) << "active_start" << dendl
;
1964 if (last_state
== MDSMap::STATE_CREATING
||
1965 last_state
== MDSMap::STATE_STARTING
) {
1966 mdcache
->open_root();
1969 mdcache
->clean_open_file_lists();
1970 mdcache
->export_remaining_imported_caps();
1971 finish_contexts(g_ceph_context
, waiting_for_replay
); // kick waiters
1972 mdcache
->start_files_to_recover();
1974 mdcache
->reissue_all_caps();
1976 finish_contexts(g_ceph_context
, waiting_for_active
); // kick waiters
1979 void MDSRank::recovery_done(int oldstate
)
1981 dout(1) << "recovery_done -- successful recovery!" << dendl
;
1982 ceph_assert(is_clientreplay() || is_active());
1984 if (oldstate
== MDSMap::STATE_CREATING
)
1987 mdcache
->start_recovered_truncates();
1988 mdcache
->start_purge_inodes();
1989 mdcache
->do_file_recover();
1991 // tell connected clients
1992 //bcast_mds_map(); // not anymore, they get this from the monitor
1994 mdcache
->populate_mydir();
1997 void MDSRank::creating_done()
1999 dout(1)<< "creating_done" << dendl
;
2000 request_state(MDSMap::STATE_ACTIVE
);
2001 // sync snaptable cache
2002 snapclient
->sync(new C_MDSInternalNoop
);
2005 void MDSRank::boot_create()
2007 dout(3) << "boot_create" << dendl
;
2009 MDSGatherBuilder
fin(g_ceph_context
, new C_MDS_VoidFn(this, &MDSRank::creating_done
));
2011 mdcache
->init_layouts();
2013 inotable
->set_rank(whoami
);
2014 sessionmap
.set_rank(whoami
);
2016 // start with a fresh journal
2017 dout(10) << "boot_create creating fresh journal" << dendl
;
2018 mdlog
->create(fin
.new_sub());
2020 // open new journal segment, but do not journal subtree map (yet)
2021 mdlog
->prepare_new_segment();
2023 if (whoami
== mdsmap
->get_root()) {
2024 dout(3) << "boot_create creating fresh hierarchy" << dendl
;
2025 mdcache
->create_empty_hierarchy(fin
.get());
2028 dout(3) << "boot_create creating mydir hierarchy" << dendl
;
2029 mdcache
->create_mydir_hierarchy(fin
.get());
2031 dout(3) << "boot_create creating global snaprealm" << dendl
;
2032 mdcache
->create_global_snaprealm();
2034 // fixme: fake out inotable (reset, pretend loaded)
2035 dout(10) << "boot_create creating fresh inotable table" << dendl
;
2037 inotable
->save(fin
.new_sub());
2039 // write empty sessionmap
2040 sessionmap
.save(fin
.new_sub());
2042 // Create empty purge queue
2043 purge_queue
.create(new C_IO_Wrapper(this, fin
.new_sub()));
2045 // initialize tables
2046 if (mdsmap
->get_tableserver() == whoami
) {
2047 dout(10) << "boot_create creating fresh snaptable" << dendl
;
2048 snapserver
->set_rank(whoami
);
2049 snapserver
->reset();
2050 snapserver
->save(fin
.new_sub());
2053 ceph_assert(g_conf()->mds_kill_create_at
!= 1);
2055 // ok now journal it
2056 mdlog
->journal_segment_subtree_map(fin
.new_sub());
2059 // Usually we do this during reconnect, but creation skips that.
2060 objecter
->enable_blacklist_events();
2065 void MDSRank::stopping_start()
2067 dout(2) << "Stopping..." << dendl
;
2069 if (mdsmap
->get_num_in_mds() == 1 && !sessionmap
.empty()) {
2070 std::vector
<Session
*> victims
;
2071 const auto& sessions
= sessionmap
.get_sessions();
2072 for (const auto& p
: sessions
) {
2073 if (!p
.first
.is_client()) {
2077 Session
*s
= p
.second
;
2078 victims
.push_back(s
);
2081 dout(20) << __func__
<< " matched " << victims
.size() << " sessions" << dendl
;
2082 ceph_assert(!victims
.empty());
2084 C_GatherBuilder
gather(g_ceph_context
, new C_MDSInternalNoop
);
2085 for (const auto &s
: victims
) {
2086 std::stringstream ss
;
2087 evict_client(s
->get_client().v
, false,
2088 g_conf()->mds_session_blacklist_on_evict
, ss
, gather
.new_sub());
2093 mdcache
->shutdown_start();
2096 void MDSRank::stopping_done()
2098 dout(2) << "Finished stopping..." << dendl
;
2100 // tell monitor we shut down cleanly.
2101 request_state(MDSMap::STATE_STOPPED
);
2104 void MDSRankDispatcher::handle_mds_map(
2105 const cref_t
<MMDSMap
> &m
,
2106 const MDSMap
&oldmap
)
2108 // I am only to be passed MDSMaps in which I hold a rank
2109 ceph_assert(whoami
!= MDS_RANK_NONE
);
2111 MDSMap::DaemonState oldstate
= state
;
2112 mds_gid_t mds_gid
= mds_gid_t(monc
->get_global_id());
2113 state
= mdsmap
->get_state_gid(mds_gid
);
2114 if (state
!= oldstate
) {
2115 last_state
= oldstate
;
2116 incarnation
= mdsmap
->get_inc_gid(mds_gid
);
2119 version_t epoch
= m
->get_epoch();
2121 // note source's map version
2122 if (m
->get_source().is_mds() &&
2123 peer_mdsmap_epoch
[mds_rank_t(m
->get_source().num())] < epoch
) {
2124 dout(15) << " peer " << m
->get_source()
2125 << " has mdsmap epoch >= " << epoch
2127 peer_mdsmap_epoch
[mds_rank_t(m
->get_source().num())] = epoch
;
2130 // Validate state transitions while I hold a rank
2131 if (!MDSMap::state_transition_valid(oldstate
, state
)) {
2132 derr
<< "Invalid state transition " << ceph_mds_state_name(oldstate
)
2133 << "->" << ceph_mds_state_name(state
) << dendl
;
2137 if (oldstate
!= state
) {
2138 // update messenger.
2139 if (state
== MDSMap::STATE_STANDBY_REPLAY
) {
2140 dout(1) << "handle_mds_map i am now mds." << mds_gid
<< "." << incarnation
2141 << " replaying mds." << whoami
<< "." << incarnation
<< dendl
;
2142 messenger
->set_myname(entity_name_t::MDS(mds_gid
));
2144 dout(1) << "handle_mds_map i am now mds." << whoami
<< "." << incarnation
<< dendl
;
2145 messenger
->set_myname(entity_name_t::MDS(whoami
));
2149 // tell objecter my incarnation
2150 if (objecter
->get_client_incarnation() != incarnation
)
2151 objecter
->set_client_incarnation(incarnation
);
2153 if (mdsmap
->get_min_compat_client() < ceph_release_t::max
&&
2154 oldmap
.get_min_compat_client() != mdsmap
->get_min_compat_client())
2155 server
->update_required_client_features();
2158 if (g_conf()->mds_dump_cache_on_map
)
2159 mdcache
->dump_cache();
2161 cluster_degraded
= mdsmap
->is_degraded();
2163 // mdsmap and oldmap can be discontinuous. failover might happen in the missing mdsmap.
2164 // the 'restart' set tracks ranks that have restarted since the old mdsmap
2165 set
<mds_rank_t
> restart
;
2166 // replaying mds does not communicate with other ranks
2167 if (state
>= MDSMap::STATE_RESOLVE
) {
2168 // did someone fail?
2170 set
<mds_rank_t
> olddown
, down
;
2171 oldmap
.get_down_mds_set(&olddown
);
2172 mdsmap
->get_down_mds_set(&down
);
2173 for (const auto& r
: down
) {
2174 if (oldmap
.have_inst(r
) && olddown
.count(r
) == 0) {
2175 messenger
->mark_down_addrs(oldmap
.get_addrs(r
));
2176 handle_mds_failure(r
);
2180 // did someone fail?
2181 // did their addr/inst change?
2183 mdsmap
->get_up_mds_set(up
);
2184 for (const auto& r
: up
) {
2185 auto& info
= mdsmap
->get_info(r
);
2186 if (oldmap
.have_inst(r
)) {
2187 auto& oldinfo
= oldmap
.get_info(r
);
2188 if (info
.inc
!= oldinfo
.inc
) {
2189 messenger
->mark_down_addrs(oldinfo
.get_addrs());
2190 if (info
.state
== MDSMap::STATE_REPLAY
||
2191 info
.state
== MDSMap::STATE_RESOLVE
) {
2193 handle_mds_failure(r
);
2195 ceph_assert(info
.state
== MDSMap::STATE_STARTING
||
2196 info
.state
== MDSMap::STATE_ACTIVE
);
2197 // -> stopped (missing) -> starting -> active
2199 mdcache
->migrator
->handle_mds_failure_or_stop(r
);
2200 if (mdsmap
->get_tableserver() == whoami
)
2201 snapserver
->handle_mds_failure_or_stop(r
);
2205 if (info
.state
== MDSMap::STATE_REPLAY
||
2206 info
.state
== MDSMap::STATE_RESOLVE
) {
2207 // -> starting/creating (missing) -> active (missing) -> replay -> resolve
2209 handle_mds_failure(r
);
2211 ceph_assert(info
.state
== MDSMap::STATE_CREATING
||
2212 info
.state
== MDSMap::STATE_STARTING
||
2213 info
.state
== MDSMap::STATE_ACTIVE
);
2220 if (oldstate
!= state
) {
2221 dout(1) << "handle_mds_map state change "
2222 << ceph_mds_state_name(oldstate
) << " --> "
2223 << ceph_mds_state_name(state
) << dendl
;
2224 beacon
.set_want_state(*mdsmap
, state
);
2226 if (oldstate
== MDSMap::STATE_STANDBY_REPLAY
) {
2227 dout(10) << "Monitor activated us! Deactivating replay loop" << dendl
;
2228 assert (state
== MDSMap::STATE_REPLAY
);
2230 // did i just recover?
2231 if ((is_active() || is_clientreplay()) &&
2232 (oldstate
== MDSMap::STATE_CREATING
||
2233 oldstate
== MDSMap::STATE_REJOIN
||
2234 oldstate
== MDSMap::STATE_RECONNECT
))
2235 recovery_done(oldstate
);
2239 } else if (is_any_replay()) {
2241 } else if (is_resolve()) {
2243 } else if (is_reconnect()) {
2245 } else if (is_rejoin()) {
2247 } else if (is_clientreplay()) {
2248 clientreplay_start();
2249 } else if (is_creating()) {
2251 } else if (is_starting()) {
2253 } else if (is_stopping()) {
2254 ceph_assert(oldstate
== MDSMap::STATE_ACTIVE
);
2261 // is someone else newly resolving?
2262 if (state
>= MDSMap::STATE_RESOLVE
) {
2263 // recover snaptable
2264 if (mdsmap
->get_tableserver() == whoami
) {
2265 if (oldstate
< MDSMap::STATE_RESOLVE
) {
2267 mdsmap
->get_mds_set_lower_bound(s
, MDSMap::STATE_RESOLVE
);
2268 snapserver
->finish_recovery(s
);
2270 set
<mds_rank_t
> old_set
, new_set
;
2271 oldmap
.get_mds_set_lower_bound(old_set
, MDSMap::STATE_RESOLVE
);
2272 mdsmap
->get_mds_set_lower_bound(new_set
, MDSMap::STATE_RESOLVE
);
2273 for (const auto& r
: new_set
) {
2276 if (!old_set
.count(r
) || restart
.count(r
)) { // newly so?
2277 snapserver
->handle_mds_recovery(r
);
2283 if ((!oldmap
.is_resolving() || !restart
.empty()) && mdsmap
->is_resolving()) {
2284 set
<mds_rank_t
> resolve
;
2285 mdsmap
->get_mds_set(resolve
, MDSMap::STATE_RESOLVE
);
2286 dout(10) << " resolve set is " << resolve
<< dendl
;
2287 calc_recovery_set();
2288 mdcache
->send_resolves();
2293 // is everybody finally rejoining?
2294 if (state
>= MDSMap::STATE_REJOIN
) {
2296 if (!oldmap
.is_rejoining() && mdsmap
->is_rejoining())
2297 rejoin_joint_start();
2300 if (g_conf()->mds_dump_cache_after_rejoin
&&
2301 oldmap
.is_rejoining() && !mdsmap
->is_rejoining())
2302 mdcache
->dump_cache(); // for DEBUG only
2304 if (oldstate
>= MDSMap::STATE_REJOIN
||
2305 oldstate
== MDSMap::STATE_STARTING
) {
2306 // ACTIVE|CLIENTREPLAY|REJOIN => we can discover from them.
2307 set
<mds_rank_t
> olddis
, dis
;
2308 oldmap
.get_mds_set_lower_bound(olddis
, MDSMap::STATE_REJOIN
);
2309 mdsmap
->get_mds_set_lower_bound(dis
, MDSMap::STATE_REJOIN
);
2310 for (const auto& r
: dis
) {
2313 if (!olddis
.count(r
) || restart
.count(r
)) { // newly so?
2314 mdcache
->kick_discovers(r
);
2315 mdcache
->kick_open_ino_peers(r
);
2321 if (oldmap
.is_degraded() && !cluster_degraded
&& state
>= MDSMap::STATE_ACTIVE
) {
2322 dout(1) << "cluster recovered." << dendl
;
2323 auto it
= waiting_for_active_peer
.find(MDS_RANK_NONE
);
2324 if (it
!= waiting_for_active_peer
.end()) {
2325 queue_waiters(it
->second
);
2326 waiting_for_active_peer
.erase(it
);
2330 // did someone go active?
2331 if (state
>= MDSMap::STATE_CLIENTREPLAY
&&
2332 oldstate
>= MDSMap::STATE_CLIENTREPLAY
) {
2333 set
<mds_rank_t
> oldactive
, active
;
2334 oldmap
.get_mds_set_lower_bound(oldactive
, MDSMap::STATE_CLIENTREPLAY
);
2335 mdsmap
->get_mds_set_lower_bound(active
, MDSMap::STATE_CLIENTREPLAY
);
2336 for (const auto& r
: active
) {
2339 if (!oldactive
.count(r
) || restart
.count(r
)) // newly so?
2340 handle_mds_recovery(r
);
2344 if (is_clientreplay() || is_active() || is_stopping()) {
2346 set
<mds_rank_t
> oldstopped
, stopped
;
2347 oldmap
.get_stopped_mds_set(oldstopped
);
2348 mdsmap
->get_stopped_mds_set(stopped
);
2349 for (const auto& r
: stopped
)
2350 if (oldstopped
.count(r
) == 0) { // newly so?
2351 mdcache
->migrator
->handle_mds_failure_or_stop(r
);
2352 if (mdsmap
->get_tableserver() == whoami
)
2353 snapserver
->handle_mds_failure_or_stop(r
);
2358 map
<epoch_t
,MDSContext::vec
>::iterator p
= waiting_for_mdsmap
.begin();
2359 while (p
!= waiting_for_mdsmap
.end() && p
->first
<= mdsmap
->get_epoch()) {
2362 waiting_for_mdsmap
.erase(p
++);
2368 // Before going active, set OSD epoch barrier to latest (so that
2369 // we don't risk handing out caps to clients with old OSD maps that
2370 // might not include barriers from the previous incarnation of this MDS)
2371 set_osd_epoch_barrier(objecter
->with_osdmap(
2372 std::mem_fn(&OSDMap::get_epoch
)));
2374 /* Now check if we should hint to the OSD that a read may follow */
2375 if (mdsmap
->has_standby_replay(whoami
))
2376 mdlog
->set_write_iohint(0);
2378 mdlog
->set_write_iohint(CEPH_OSD_OP_FLAG_FADVISE_DONTNEED
);
2381 if (oldmap
.get_max_mds() != mdsmap
->get_max_mds()) {
2382 purge_queue
.update_op_limit(*mdsmap
);
2385 if (mdsmap
->get_inline_data_enabled() && !oldmap
.get_inline_data_enabled())
2386 dout(0) << "WARNING: inline_data support has been deprecated and will be removed in a future release" << dendl
;
2388 if (scrubstack
->is_scrubbing()) {
2389 if (mdsmap
->get_max_mds() > 1) {
2390 auto c
= new C_MDSInternalNoop
;
2391 scrubstack
->scrub_abort(c
);
2394 mdcache
->handle_mdsmap(*mdsmap
);
2397 void MDSRank::handle_mds_recovery(mds_rank_t who
)
2399 dout(5) << "handle_mds_recovery mds." << who
<< dendl
;
2401 mdcache
->handle_mds_recovery(who
);
2403 queue_waiters(waiting_for_active_peer
[who
]);
2404 waiting_for_active_peer
.erase(who
);
2407 void MDSRank::handle_mds_failure(mds_rank_t who
)
2409 if (who
== whoami
) {
2410 dout(5) << "handle_mds_failure for myself; not doing anything" << dendl
;
2413 dout(5) << "handle_mds_failure mds." << who
<< dendl
;
2415 mdcache
->handle_mds_failure(who
);
2417 if (mdsmap
->get_tableserver() == whoami
)
2418 snapserver
->handle_mds_failure_or_stop(who
);
2420 snapclient
->handle_mds_failure(who
);
2423 void MDSRankDispatcher::handle_asok_command(
2424 std::string_view command
,
2425 const cmdmap_t
& cmdmap
,
2427 const bufferlist
&inbl
,
2428 std::function
<void(int,const std::string
&,bufferlist
&)> on_finish
)
2433 if (command
== "dump_ops_in_flight" ||
2435 if (!op_tracker
.dump_ops_in_flight(f
)) {
2436 ss
<< "op_tracker disabled; set mds_enable_op_tracker=true to enable";
2438 } else if (command
== "dump_blocked_ops") {
2439 if (!op_tracker
.dump_ops_in_flight(f
, true)) {
2440 ss
<< "op_tracker disabled; set mds_enable_op_tracker=true to enable";
2442 } else if (command
== "dump_historic_ops") {
2443 if (!op_tracker
.dump_historic_ops(f
)) {
2444 ss
<< "op_tracker disabled; set mds_enable_op_tracker=true to enable";
2446 } else if (command
== "dump_historic_ops_by_duration") {
2447 if (!op_tracker
.dump_historic_ops(f
, true)) {
2448 ss
<< "op_tracker disabled; set mds_enable_op_tracker=true to enable";
2450 } else if (command
== "osdmap barrier") {
2451 int64_t target_epoch
= 0;
2452 bool got_val
= cmd_getval(cmdmap
, "target_epoch", target_epoch
);
2455 ss
<< "no target epoch given";
2460 std::lock_guard
l(mds_lock
);
2461 set_osd_epoch_barrier(target_epoch
);
2464 bool already_got
= objecter
->wait_for_map(target_epoch
, &cond
);
2466 dout(4) << __func__
<< ": waiting for OSD epoch " << target_epoch
<< dendl
;
2469 } else if (command
== "session ls" ||
2470 command
== "client ls") {
2471 std::lock_guard
l(mds_lock
);
2472 std::vector
<std::string
> filter_args
;
2473 cmd_getval(cmdmap
, "filters", filter_args
);
2474 SessionFilter filter
;
2475 r
= filter
.parse(filter_args
, &ss
);
2479 dump_sessions(filter
, f
);
2480 } else if (command
== "session evict" ||
2481 command
== "client evict") {
2482 std::lock_guard
l(mds_lock
);
2483 std::vector
<std::string
> filter_args
;
2484 cmd_getval(cmdmap
, "filters", filter_args
);
2486 SessionFilter filter
;
2487 r
= filter
.parse(filter_args
, &ss
);
2492 evict_clients(filter
, on_finish
);
2494 } else if (command
== "session kill") {
2495 std::string client_id
;
2496 if (!cmd_getval(cmdmap
, "client_id", client_id
)) {
2497 ss
<< "Invalid client_id specified";
2501 std::lock_guard
l(mds_lock
);
2502 bool evicted
= evict_client(strtol(client_id
.c_str(), 0, 10), true,
2503 g_conf()->mds_session_blacklist_on_evict
, ss
);
2505 dout(15) << ss
.str() << dendl
;
2508 } else if (command
== "session config" ||
2509 command
== "client config") {
2514 cmd_getval(cmdmap
, "client_id", client_id
);
2515 cmd_getval(cmdmap
, "option", option
);
2516 bool got_value
= cmd_getval(cmdmap
, "value", value
);
2518 std::lock_guard
l(mds_lock
);
2519 r
= config_client(client_id
, !got_value
, option
, value
, ss
);
2520 } else if (command
== "scrub start" ||
2521 command
== "scrub_start") {
2524 vector
<string
> scrubop_vec
;
2525 cmd_getval(cmdmap
, "scrubops", scrubop_vec
);
2526 cmd_getval(cmdmap
, "path", path
);
2527 cmd_getval(cmdmap
, "tag", tag
);
2529 /* Multiple MDS scrub is not currently supported. See also: https://tracker.ceph.com/issues/12274 */
2530 if (mdsmap
->get_max_mds() > 1) {
2531 ss
<< "Scrub is not currently supported for multiple active MDS. Please reduce max_mds to 1 and then scrub.";
2538 [this, on_finish
, f
, path
, tag
, scrubop_vec
](int r
) {
2539 command_scrub_start(
2540 f
, path
, tag
, scrubop_vec
,
2542 [on_finish
](int r
) {
2544 on_finish(r
, {}, outbl
);
2548 } else if (command
== "scrub abort") {
2551 [this, on_finish
, f
](int r
) {
2552 command_scrub_abort(
2555 [on_finish
, f
](int r
) {
2557 f
->open_object_section("result");
2558 f
->dump_int("return_code", r
);
2560 on_finish(r
, {}, outbl
);
2564 } else if (command
== "scrub pause") {
2567 [this, on_finish
, f
](int r
) {
2568 command_scrub_pause(
2571 [on_finish
, f
](int r
) {
2573 f
->open_object_section("result");
2574 f
->dump_int("return_code", r
);
2576 on_finish(r
, {}, outbl
);
2580 } else if (command
== "scrub resume") {
2581 command_scrub_resume(f
);
2582 } else if (command
== "scrub status") {
2583 command_scrub_status(f
);
2584 } else if (command
== "tag path") {
2586 cmd_getval(cmdmap
, "path", path
);
2588 cmd_getval(cmdmap
, "tag", tag
);
2589 command_tag_path(f
, path
, tag
);
2590 } else if (command
== "flush_path") {
2592 cmd_getval(cmdmap
, "path", path
);
2593 command_flush_path(f
, path
);
2594 } else if (command
== "flush journal") {
2595 command_flush_journal(f
);
2596 } else if (command
== "get subtrees") {
2597 command_get_subtrees(f
);
2598 } else if (command
== "export dir") {
2600 if(!cmd_getval(cmdmap
, "path", path
)) {
2601 ss
<< "malformed path";
2606 if(!cmd_getval(cmdmap
, "rank", rank
)) {
2607 ss
<< "malformed rank";
2611 command_export_dir(f
, path
, (mds_rank_t
)rank
);
2612 } else if (command
== "dump cache") {
2613 std::lock_guard
l(mds_lock
);
2615 if (!cmd_getval(cmdmap
, "path", path
)) {
2616 r
= mdcache
->dump_cache(f
);
2618 r
= mdcache
->dump_cache(path
);
2620 } else if (command
== "cache drop") {
2621 int64_t timeout
= 0;
2622 cmd_getval(cmdmap
, "timeout", timeout
);
2625 [this, on_finish
, f
, timeout
](int r
) {
2629 [on_finish
](int r
) {
2631 on_finish(r
, {}, outbl
);
2635 } else if (command
== "cache status") {
2636 std::lock_guard
l(mds_lock
);
2637 mdcache
->cache_status(f
);
2638 } else if (command
== "dump tree") {
2639 command_dump_tree(cmdmap
, ss
, f
);
2640 } else if (command
== "dump loads") {
2641 std::lock_guard
l(mds_lock
);
2642 r
= balancer
->dump_loads(f
);
2643 } else if (command
== "dump snaps") {
2644 std::lock_guard
l(mds_lock
);
2646 cmd_getval(cmdmap
, "server", server
);
2647 if (server
== "--server") {
2648 if (mdsmap
->get_tableserver() == whoami
) {
2649 snapserver
->dump(f
);
2652 ss
<< "Not snapserver";
2655 r
= snapclient
->dump_cache(f
);
2657 } else if (command
== "force_readonly") {
2658 std::lock_guard
l(mds_lock
);
2659 mdcache
->force_readonly();
2660 } else if (command
== "dirfrag split") {
2661 command_dirfrag_split(cmdmap
, ss
);
2662 } else if (command
== "dirfrag merge") {
2663 command_dirfrag_merge(cmdmap
, ss
);
2664 } else if (command
== "dirfrag ls") {
2665 command_dirfrag_ls(cmdmap
, ss
, f
);
2666 } else if (command
== "openfiles ls") {
2667 command_openfiles_ls(f
);
2668 } else if (command
== "dump inode") {
2669 command_dump_inode(f
, cmdmap
, ss
);
2670 } else if (command
== "damage ls") {
2671 std::lock_guard
l(mds_lock
);
2672 damage_table
.dump(f
);
2673 } else if (command
== "damage rm") {
2674 std::lock_guard
l(mds_lock
);
2675 damage_entry_id_t id
= 0;
2676 if (!cmd_getval(cmdmap
, "damage_id", (int64_t&)id
)) {
2680 damage_table
.erase(id
);
2685 on_finish(r
, ss
.str(), outbl
);
2689 * This function drops the mds_lock, so don't do anything with
2690 * MDSRank after calling it (we could have gone into shutdown): just
2691 * send your result back to the calling client and finish.
2693 void MDSRankDispatcher::evict_clients(
2694 const SessionFilter
&filter
,
2695 std::function
<void(int,const std::string
&,bufferlist
&)> on_finish
)
2698 if (is_any_replay()) {
2699 on_finish(-EAGAIN
, "MDS is replaying log", outbl
);
2703 std::vector
<Session
*> victims
;
2704 const auto& sessions
= sessionmap
.get_sessions();
2705 for (const auto& p
: sessions
) {
2706 if (!p
.first
.is_client()) {
2710 Session
*s
= p
.second
;
2712 if (filter
.match(*s
, std::bind(&Server::waiting_for_reconnect
, server
,
2713 std::placeholders::_1
))) {
2714 victims
.push_back(s
);
2718 dout(20) << __func__
<< " matched " << victims
.size() << " sessions" << dendl
;
2720 if (victims
.empty()) {
2721 on_finish(0, {}, outbl
);
2725 C_GatherBuilder
gather(g_ceph_context
,
2726 new LambdaContext([on_finish
](int r
) {
2728 on_finish(r
, {}, bl
);
2730 for (const auto s
: victims
) {
2731 std::stringstream ss
;
2732 evict_client(s
->get_client().v
, false,
2733 g_conf()->mds_session_blacklist_on_evict
, ss
, gather
.new_sub());
2738 void MDSRankDispatcher::dump_sessions(const SessionFilter
&filter
, Formatter
*f
) const
2740 // Dump sessions, decorated with recovery/replay status
2741 f
->open_array_section("sessions");
2742 for (auto& [name
, s
] : sessionmap
.get_sessions()) {
2743 if (!name
.is_client()) {
2747 if (!filter
.match(*s
, std::bind(&Server::waiting_for_reconnect
, server
, std::placeholders::_1
))) {
2751 f
->dump_object("session", *s
);
2753 f
->close_section(); // sessions
2756 void MDSRank::command_scrub_start(Formatter
*f
,
2757 std::string_view path
, std::string_view tag
,
2758 const vector
<string
>& scrubop_vec
, Context
*on_finish
)
2761 bool recursive
= false;
2762 bool repair
= false;
2763 for (auto &op
: scrubop_vec
) {
2766 else if (op
== "recursive")
2768 else if (op
== "repair")
2772 std::lock_guard
l(mds_lock
);
2773 mdcache
->enqueue_scrub(path
, tag
, force
, recursive
, repair
, f
, on_finish
);
2774 // scrub_dentry() finishers will dump the data for us; we're done!
2777 void MDSRank::command_tag_path(Formatter
*f
,
2778 std::string_view path
, std::string_view tag
)
2782 std::lock_guard
l(mds_lock
);
2783 mdcache
->enqueue_scrub(path
, tag
, true, true, false, f
, &scond
);
2788 void MDSRank::command_scrub_abort(Formatter
*f
, Context
*on_finish
) {
2789 std::lock_guard
l(mds_lock
);
2790 scrubstack
->scrub_abort(on_finish
);
2793 void MDSRank::command_scrub_pause(Formatter
*f
, Context
*on_finish
) {
2794 std::lock_guard
l(mds_lock
);
2795 scrubstack
->scrub_pause(on_finish
);
2798 void MDSRank::command_scrub_resume(Formatter
*f
) {
2799 std::lock_guard
l(mds_lock
);
2800 int r
= scrubstack
->scrub_resume();
2802 f
->open_object_section("result");
2803 f
->dump_int("return_code", r
);
2807 void MDSRank::command_scrub_status(Formatter
*f
) {
2808 std::lock_guard
l(mds_lock
);
2809 scrubstack
->scrub_status(f
);
2812 void MDSRank::command_flush_path(Formatter
*f
, std::string_view path
)
2816 std::lock_guard
l(mds_lock
);
2817 mdcache
->flush_dentry(path
, &scond
);
2819 int r
= scond
.wait();
2820 f
->open_object_section("results");
2821 f
->dump_int("return_code", r
);
2822 f
->close_section(); // results
2825 // synchronous wrapper around "journal flush" asynchronous context
2827 void MDSRank::command_flush_journal(Formatter
*f
) {
2828 ceph_assert(f
!= NULL
);
2831 std::stringstream ss
;
2833 std::lock_guard
locker(mds_lock
);
2834 C_Flush_Journal
*flush_journal
= new C_Flush_Journal(mdcache
, mdlog
, this, &ss
, &cond
);
2835 flush_journal
->send();
2837 int r
= cond
.wait();
2839 f
->open_object_section("result");
2840 f
->dump_string("message", ss
.str());
2841 f
->dump_int("return_code", r
);
2845 void MDSRank::command_get_subtrees(Formatter
*f
)
2847 ceph_assert(f
!= NULL
);
2848 std::lock_guard
l(mds_lock
);
2850 std::vector
<CDir
*> subtrees
;
2851 mdcache
->get_subtrees(subtrees
);
2853 f
->open_array_section("subtrees");
2854 for (const auto& dir
: subtrees
) {
2855 f
->open_object_section("subtree");
2857 f
->dump_bool("is_auth", dir
->is_auth());
2858 f
->dump_int("auth_first", dir
->get_dir_auth().first
);
2859 f
->dump_int("auth_second", dir
->get_dir_auth().second
);
2860 f
->dump_int("export_pin", dir
->inode
->get_export_pin());
2861 f
->open_object_section("dir");
2871 void MDSRank::command_export_dir(Formatter
*f
,
2872 std::string_view path
,
2875 int r
= _command_export_dir(path
, target
);
2876 f
->open_object_section("results");
2877 f
->dump_int("return_code", r
);
2878 f
->close_section(); // results
2881 int MDSRank::_command_export_dir(
2882 std::string_view path
,
2885 std::lock_guard
l(mds_lock
);
2888 if (target
== whoami
|| !mdsmap
->is_up(target
) || !mdsmap
->is_in(target
)) {
2889 derr
<< "bad MDS target " << target
<< dendl
;
2893 CInode
*in
= mdcache
->cache_traverse(fp
);
2895 derr
<< "Bath path '" << path
<< "'" << dendl
;
2898 CDir
*dir
= in
->get_dirfrag(frag_t());
2899 if (!dir
|| !(dir
->is_auth())) {
2900 derr
<< "bad export_dir path dirfrag frag_t() or dir not auth" << dendl
;
2904 mdcache
->migrator
->export_dir(dir
, target
);
2908 void MDSRank::command_dump_tree(const cmdmap_t
&cmdmap
, std::ostream
&ss
, Formatter
*f
)
2912 cmd_getval(cmdmap
, "root", root
);
2913 if (!cmd_getval(cmdmap
, "depth", depth
))
2915 std::lock_guard
l(mds_lock
);
2916 CInode
*in
= mdcache
->cache_traverse(filepath(root
.c_str()));
2918 ss
<< "root inode is not in cache";
2921 f
->open_array_section("inodes");
2922 mdcache
->dump_tree(in
, 0, depth
, f
);
2926 CDir
*MDSRank::_command_dirfrag_get(
2927 const cmdmap_t
&cmdmap
,
2931 bool got
= cmd_getval(cmdmap
, "path", path
);
2933 ss
<< "missing path argument";
2937 std::string frag_str
;
2938 if (!cmd_getval(cmdmap
, "frag", frag_str
)) {
2939 ss
<< "missing frag argument";
2943 CInode
*in
= mdcache
->cache_traverse(filepath(path
.c_str()));
2945 // TODO really we should load something in if it's not in cache,
2946 // but the infrastructure is harder, and we might still be unable
2947 // to act on it if someone else is auth.
2948 ss
<< "directory '" << path
<< "' inode not in cache";
2954 if (!fg
.parse(frag_str
.c_str())) {
2955 ss
<< "frag " << frag_str
<< " failed to parse";
2959 CDir
*dir
= in
->get_dirfrag(fg
);
2961 ss
<< "frag " << in
->ino() << "/" << fg
<< " not in cache ("
2962 "use `dirfrag ls` to see if it should exist)";
2966 if (!dir
->is_auth()) {
2967 ss
<< "frag " << dir
->dirfrag() << " not auth (auth = "
2968 << dir
->authority() << ")";
2975 bool MDSRank::command_dirfrag_split(
2979 std::lock_guard
l(mds_lock
);
2981 if (!cmd_getval(cmdmap
, "bits", by
)) {
2982 ss
<< "missing bits argument";
2987 ss
<< "must split by >0 bits";
2991 CDir
*dir
= _command_dirfrag_get(cmdmap
, ss
);
2996 mdcache
->split_dir(dir
, by
);
3001 bool MDSRank::command_dirfrag_merge(
3005 std::lock_guard
l(mds_lock
);
3007 bool got
= cmd_getval(cmdmap
, "path", path
);
3009 ss
<< "missing path argument";
3013 std::string frag_str
;
3014 if (!cmd_getval(cmdmap
, "frag", frag_str
)) {
3015 ss
<< "missing frag argument";
3019 CInode
*in
= mdcache
->cache_traverse(filepath(path
.c_str()));
3021 ss
<< "directory '" << path
<< "' inode not in cache";
3026 if (!fg
.parse(frag_str
.c_str())) {
3027 ss
<< "frag " << frag_str
<< " failed to parse";
3031 mdcache
->merge_dir(in
, fg
);
3036 bool MDSRank::command_dirfrag_ls(
3041 std::lock_guard
l(mds_lock
);
3043 bool got
= cmd_getval(cmdmap
, "path", path
);
3045 ss
<< "missing path argument";
3049 CInode
*in
= mdcache
->cache_traverse(filepath(path
.c_str()));
3051 ss
<< "directory inode not in cache";
3055 f
->open_array_section("frags");
3057 // NB using get_leaves_under instead of get_dirfrags to give
3058 // you the list of what dirfrags may exist, not which are in cache
3059 in
->dirfragtree
.get_leaves_under(frag_t(), leaves
);
3060 for (const auto& leaf
: leaves
) {
3061 f
->open_object_section("frag");
3062 f
->dump_int("value", leaf
.value());
3063 f
->dump_int("bits", leaf
.bits());
3064 CachedStackStringStream css
;
3065 *css
<< std::hex
<< leaf
.value() << "/" << std::dec
<< leaf
.bits();
3066 f
->dump_string("str", css
->strv());
3074 void MDSRank::command_openfiles_ls(Formatter
*f
)
3076 std::lock_guard
l(mds_lock
);
3077 mdcache
->dump_openfiles(f
);
3080 void MDSRank::command_dump_inode(Formatter
*f
, const cmdmap_t
&cmdmap
, std::ostream
&ss
)
3082 std::lock_guard
l(mds_lock
);
3084 bool got
= cmd_getval(cmdmap
, "number", number
);
3086 ss
<< "missing inode number";
3090 bool success
= mdcache
->dump_inode(f
, number
);
3092 ss
<< "dump inode failed, wrong inode number or the inode is not cached";
3096 void MDSRank::dump_status(Formatter
*f
) const
3098 if (state
== MDSMap::STATE_REPLAY
||
3099 state
== MDSMap::STATE_STANDBY_REPLAY
) {
3100 mdlog
->dump_replay_status(f
);
3101 } else if (state
== MDSMap::STATE_RESOLVE
) {
3102 mdcache
->dump_resolve_status(f
);
3103 } else if (state
== MDSMap::STATE_RECONNECT
) {
3104 server
->dump_reconnect_status(f
);
3105 } else if (state
== MDSMap::STATE_REJOIN
) {
3106 mdcache
->dump_rejoin_status(f
);
3107 } else if (state
== MDSMap::STATE_CLIENTREPLAY
) {
3108 dump_clientreplay_status(f
);
3110 f
->dump_float("rank_uptime", get_uptime().count());
3113 void MDSRank::dump_clientreplay_status(Formatter
*f
) const
3115 f
->open_object_section("clientreplay_status");
3116 f
->dump_unsigned("clientreplay_queue", replay_queue
.size());
3117 f
->dump_unsigned("active_replay", mdcache
->get_num_client_requests());
3121 void MDSRankDispatcher::update_log_config()
3123 map
<string
,string
> log_to_monitors
;
3124 map
<string
,string
> log_to_syslog
;
3125 map
<string
,string
> log_channel
;
3126 map
<string
,string
> log_prio
;
3127 map
<string
,string
> log_to_graylog
;
3128 map
<string
,string
> log_to_graylog_host
;
3129 map
<string
,string
> log_to_graylog_port
;
3133 if (parse_log_client_options(g_ceph_context
, log_to_monitors
, log_to_syslog
,
3134 log_channel
, log_prio
, log_to_graylog
,
3135 log_to_graylog_host
, log_to_graylog_port
,
3137 clog
->update_config(log_to_monitors
, log_to_syslog
,
3138 log_channel
, log_prio
, log_to_graylog
,
3139 log_to_graylog_host
, log_to_graylog_port
,
3141 dout(10) << __func__
<< " log_to_monitors " << log_to_monitors
<< dendl
;
3144 void MDSRank::create_logger()
3146 dout(10) << "create_logger" << dendl
;
3148 PerfCountersBuilder
mds_plb(g_ceph_context
, "mds", l_mds_first
, l_mds_last
);
3150 // super useful (high prio) perf stats
3151 mds_plb
.add_u64_counter(l_mds_request
, "request", "Requests", "req",
3152 PerfCountersBuilder::PRIO_CRITICAL
);
3153 mds_plb
.add_time_avg(l_mds_reply_latency
, "reply_latency", "Reply latency", "rlat",
3154 PerfCountersBuilder::PRIO_CRITICAL
);
3155 mds_plb
.add_u64(l_mds_inodes
, "inodes", "Inodes", "inos",
3156 PerfCountersBuilder::PRIO_CRITICAL
);
3157 mds_plb
.add_u64_counter(l_mds_forward
, "forward", "Forwarding request", "fwd",
3158 PerfCountersBuilder::PRIO_INTERESTING
);
3159 mds_plb
.add_u64(l_mds_caps
, "caps", "Capabilities", "caps",
3160 PerfCountersBuilder::PRIO_INTERESTING
);
3161 mds_plb
.add_u64_counter(l_mds_exported_inodes
, "exported_inodes", "Exported inodes",
3162 "exi", PerfCountersBuilder::PRIO_INTERESTING
);
3163 mds_plb
.add_u64_counter(l_mds_imported_inodes
, "imported_inodes", "Imported inodes",
3164 "imi", PerfCountersBuilder::PRIO_INTERESTING
);
3166 // useful dir/inode/subtree stats
3167 mds_plb
.set_prio_default(PerfCountersBuilder::PRIO_USEFUL
);
3168 mds_plb
.add_u64(l_mds_root_rfiles
, "root_rfiles", "root inode rfiles");
3169 mds_plb
.add_u64(l_mds_root_rbytes
, "root_rbytes", "root inode rbytes");
3170 mds_plb
.add_u64(l_mds_root_rsnaps
, "root_rsnaps", "root inode rsnaps");
3171 mds_plb
.add_u64_counter(l_mds_dir_fetch
, "dir_fetch", "Directory fetch");
3172 mds_plb
.add_u64_counter(l_mds_dir_commit
, "dir_commit", "Directory commit");
3173 mds_plb
.add_u64_counter(l_mds_dir_split
, "dir_split", "Directory split");
3174 mds_plb
.add_u64_counter(l_mds_dir_merge
, "dir_merge", "Directory merge");
3175 mds_plb
.add_u64(l_mds_inodes_pinned
, "inodes_pinned", "Inodes pinned");
3176 mds_plb
.add_u64(l_mds_inodes_expired
, "inodes_expired", "Inodes expired");
3177 mds_plb
.add_u64(l_mds_inodes_with_caps
, "inodes_with_caps",
3178 "Inodes with capabilities");
3179 mds_plb
.add_u64(l_mds_subtrees
, "subtrees", "Subtrees");
3180 mds_plb
.add_u64(l_mds_load_cent
, "load_cent", "Load per cent");
3181 mds_plb
.add_u64_counter(l_mds_openino_dir_fetch
, "openino_dir_fetch",
3182 "OpenIno incomplete directory fetchings");
3185 mds_plb
.set_prio_default(PerfCountersBuilder::PRIO_DEBUGONLY
);
3186 mds_plb
.add_u64_counter(l_mds_reply
, "reply", "Replies");
3187 mds_plb
.add_u64(l_mds_inodes_top
, "inodes_top", "Inodes on top");
3188 mds_plb
.add_u64(l_mds_inodes_bottom
, "inodes_bottom", "Inodes on bottom");
3190 l_mds_inodes_pin_tail
, "inodes_pin_tail", "Inodes on pin tail");
3191 mds_plb
.add_u64_counter(l_mds_traverse
, "traverse", "Traverses");
3192 mds_plb
.add_u64_counter(l_mds_traverse_hit
, "traverse_hit", "Traverse hits");
3193 mds_plb
.add_u64_counter(l_mds_traverse_forward
, "traverse_forward",
3194 "Traverse forwards");
3195 mds_plb
.add_u64_counter(l_mds_traverse_discover
, "traverse_discover",
3196 "Traverse directory discovers");
3197 mds_plb
.add_u64_counter(l_mds_traverse_dir_fetch
, "traverse_dir_fetch",
3198 "Traverse incomplete directory content fetchings");
3199 mds_plb
.add_u64_counter(l_mds_traverse_remote_ino
, "traverse_remote_ino",
3200 "Traverse remote dentries");
3201 mds_plb
.add_u64_counter(l_mds_traverse_lock
, "traverse_lock",
3203 mds_plb
.add_u64(l_mds_dispatch_queue_len
, "q", "Dispatch queue length");
3204 mds_plb
.add_u64_counter(l_mds_exported
, "exported", "Exports");
3205 mds_plb
.add_u64_counter(l_mds_imported
, "imported", "Imports");
3206 mds_plb
.add_u64_counter(l_mds_openino_backtrace_fetch
, "openino_backtrace_fetch",
3207 "OpenIno backtrace fetchings");
3208 mds_plb
.add_u64_counter(l_mds_openino_peer_discover
, "openino_peer_discover",
3209 "OpenIno peer inode discovers");
3211 logger
= mds_plb
.create_perf_counters();
3212 g_ceph_context
->get_perfcounters_collection()->add(logger
);
3216 PerfCountersBuilder
mdm_plb(g_ceph_context
, "mds_mem", l_mdm_first
, l_mdm_last
);
3217 mdm_plb
.add_u64(l_mdm_ino
, "ino", "Inodes", "ino",
3218 PerfCountersBuilder::PRIO_INTERESTING
);
3219 mdm_plb
.add_u64(l_mdm_dn
, "dn", "Dentries", "dn",
3220 PerfCountersBuilder::PRIO_INTERESTING
);
3222 mdm_plb
.set_prio_default(PerfCountersBuilder::PRIO_USEFUL
);
3223 mdm_plb
.add_u64_counter(l_mdm_inoa
, "ino+", "Inodes opened");
3224 mdm_plb
.add_u64_counter(l_mdm_inos
, "ino-", "Inodes closed");
3225 mdm_plb
.add_u64(l_mdm_dir
, "dir", "Directories");
3226 mdm_plb
.add_u64_counter(l_mdm_dira
, "dir+", "Directories opened");
3227 mdm_plb
.add_u64_counter(l_mdm_dirs
, "dir-", "Directories closed");
3228 mdm_plb
.add_u64_counter(l_mdm_dna
, "dn+", "Dentries opened");
3229 mdm_plb
.add_u64_counter(l_mdm_dns
, "dn-", "Dentries closed");
3230 mdm_plb
.add_u64(l_mdm_cap
, "cap", "Capabilities");
3231 mdm_plb
.add_u64_counter(l_mdm_capa
, "cap+", "Capabilities added");
3232 mdm_plb
.add_u64_counter(l_mdm_caps
, "cap-", "Capabilities removed");
3233 mdm_plb
.add_u64(l_mdm_heap
, "heap", "Heap size");
3235 mdm_plb
.set_prio_default(PerfCountersBuilder::PRIO_DEBUGONLY
);
3236 mdm_plb
.add_u64(l_mdm_rss
, "rss", "RSS");
3238 mlogger
= mdm_plb
.create_perf_counters();
3239 g_ceph_context
->get_perfcounters_collection()->add(mlogger
);
3242 mdlog
->create_logger();
3243 server
->create_logger();
3244 purge_queue
.create_logger();
3245 sessionmap
.register_perfcounters();
3246 mdcache
->register_perfcounters();
3249 void MDSRank::check_ops_in_flight()
3252 vector
<string
> warnings
;
3254 if (op_tracker
.check_ops_in_flight(&summary
, warnings
, &slow
)) {
3255 clog
->warn() << summary
;
3256 for (const auto& warning
: warnings
) {
3257 clog
->warn() << warning
;
3261 // set mds slow request count
3262 mds_slow_req_count
= slow
;
3266 void MDSRankDispatcher::handle_osd_map()
3269 mdsmap
->get_tableserver() == whoami
) {
3270 snapserver
->check_osd_map(true);
3273 server
->handle_osd_map();
3275 purge_queue
.update_op_limit(*mdsmap
);
3277 std::set
<entity_addr_t
> newly_blacklisted
;
3278 objecter
->consume_blacklist_events(&newly_blacklisted
);
3279 auto epoch
= objecter
->with_osdmap([](const OSDMap
&o
){return o
.get_epoch();});
3280 dout(4) << "handle_osd_map epoch " << epoch
<< ", "
3281 << newly_blacklisted
.size() << " new blacklist entries" << dendl
;
3282 auto victims
= server
->apply_blacklist(newly_blacklisted
);
3284 set_osd_epoch_barrier(epoch
);
3288 // By default the objecter only requests OSDMap updates on use,
3289 // we would like to always receive the latest maps in order to
3290 // apply policy based on the FULL flag.
3291 objecter
->maybe_request_map();
3294 int MDSRank::config_client(int64_t session_id
, bool remove
,
3295 const std::string
& option
, const std::string
& value
,
3298 Session
*session
= sessionmap
.get_session(entity_name_t(CEPH_ENTITY_TYPE_CLIENT
, session_id
));
3300 ss
<< "session " << session_id
<< " not in sessionmap!";
3304 if (option
== "timeout") {
3306 auto it
= session
->info
.client_metadata
.find("timeout");
3307 if (it
== session
->info
.client_metadata
.end()) {
3308 ss
<< "Nonexistent config: " << option
;
3311 session
->info
.client_metadata
.erase(it
);
3314 strtoul(value
.c_str(), &end
, 0);
3316 ss
<< "Invalid config for timeout: " << value
;
3319 session
->info
.client_metadata
[option
] = value
;
3321 //sessionmap._mark_dirty(session, true);
3323 ss
<< "Invalid config option: " << option
;
3330 bool MDSRank::evict_client(int64_t session_id
,
3331 bool wait
, bool blacklist
, std::ostream
& err_ss
,
3334 ceph_assert(ceph_mutex_is_locked_by_me(mds_lock
));
3336 // Mutually exclusive args
3337 ceph_assert(!(wait
&& on_killed
!= nullptr));
3339 if (is_any_replay()) {
3340 err_ss
<< "MDS is replaying log";
3344 Session
*session
= sessionmap
.get_session(
3345 entity_name_t(CEPH_ENTITY_TYPE_CLIENT
, session_id
));
3347 err_ss
<< "session " << session_id
<< " not in sessionmap!";
3351 auto& addr
= session
->info
.inst
.addr
;
3353 CachedStackStringStream css
;
3354 *css
<< "Evicting " << (blacklist
? "(and blacklisting) " : "")
3355 << "client session " << session_id
<< " (" << addr
<< ")";
3356 dout(1) << css
->strv() << dendl
;
3357 clog
->info() << css
->strv();
3360 dout(4) << "Preparing blacklist command... (wait=" << wait
<< ")" << dendl
;
3362 ss
<< "{\"prefix\":\"osd blacklist\", \"blacklistop\":\"add\",";
3363 ss
<< "\"addr\":\"";
3366 std::string tmp
= ss
.str();
3367 std::vector
<std::string
> cmd
= {tmp
};
3369 auto kill_client_session
= [this, session_id
, wait
, on_killed
](){
3370 ceph_assert(ceph_mutex_is_locked_by_me(mds_lock
));
3371 Session
*session
= sessionmap
.get_session(
3372 entity_name_t(CEPH_ENTITY_TYPE_CLIENT
, session_id
));
3374 if (on_killed
|| !wait
) {
3375 server
->kill_session(session
, on_killed
);
3377 C_SaferCond on_safe
;
3378 server
->kill_session(session
, &on_safe
);
3385 dout(1) << "session " << session_id
<< " was removed while we waited "
3386 "for blacklist" << dendl
;
3388 // Even though it wasn't us that removed it, kick our completion
3389 // as the session has been removed.
3391 on_killed
->complete(0);
3396 auto apply_blacklist
= [this, cmd
](std::function
<void ()> fn
){
3397 ceph_assert(ceph_mutex_is_locked_by_me(mds_lock
));
3399 Context
*on_blacklist_done
= new LambdaContext([this, fn
](int r
) {
3400 objecter
->wait_for_latest_osdmap(
3402 new LambdaContext([this, fn
](int r
) {
3403 std::lock_guard
l(mds_lock
);
3404 auto epoch
= objecter
->with_osdmap([](const OSDMap
&o
){
3405 return o
.get_epoch();
3408 set_osd_epoch_barrier(epoch
);
3415 dout(4) << "Sending mon blacklist command: " << cmd
[0] << dendl
;
3416 monc
->start_mon_command(cmd
, {}, nullptr, nullptr, on_blacklist_done
);
3421 C_SaferCond inline_ctx
;
3422 apply_blacklist([&inline_ctx
](){inline_ctx
.complete(0);});
3428 // We dropped mds_lock, so check that session still exists
3429 session
= sessionmap
.get_session(entity_name_t(CEPH_ENTITY_TYPE_CLIENT
,
3432 dout(1) << "session " << session_id
<< " was removed while we waited "
3433 "for blacklist" << dendl
;
3436 kill_client_session();
3439 apply_blacklist(kill_client_session
);
3441 kill_client_session();
3448 void MDSRank::bcast_mds_map()
3450 dout(7) << "bcast_mds_map " << mdsmap
->get_epoch() << dendl
;
3452 // share the map with mounted clients
3453 set
<Session
*> clients
;
3454 sessionmap
.get_client_session_set(clients
);
3455 for (const auto &session
: clients
) {
3456 auto m
= make_message
<MMDSMap
>(monc
->get_fsid(), *mdsmap
);
3457 session
->get_connection()->send_message2(std::move(m
));
3459 last_client_mdsmap_bcast
= mdsmap
->get_epoch();
3462 MDSRankDispatcher::MDSRankDispatcher(
3464 ceph::mutex
&mds_lock_
,
3465 LogChannelRef
&clog_
,
3468 std::unique_ptr
<MDSMap
> &mdsmap_
,
3472 Context
*respawn_hook_
,
3473 Context
*suicide_hook_
)
3474 : MDSRank(whoami_
, mds_lock_
, clog_
, timer_
, beacon_
, mdsmap_
,
3475 msgr
, monc_
, mgrc
, respawn_hook_
, suicide_hook_
)
3477 g_conf().add_observer(this);
3480 void MDSRank::command_cache_drop(uint64_t timeout
, Formatter
*f
, Context
*on_finish
) {
3481 dout(20) << __func__
<< dendl
;
3483 std::lock_guard
locker(mds_lock
);
3484 C_Drop_Cache
*request
= new C_Drop_Cache(server
, mdcache
, mdlog
, this,
3485 timeout
, f
, on_finish
);
3489 epoch_t
MDSRank::get_osd_epoch() const
3491 return objecter
->with_osdmap(std::mem_fn(&OSDMap::get_epoch
));
3494 const char** MDSRankDispatcher::get_tracked_conf_keys() const
3496 static const char* KEYS
[] = {
3498 "clog_to_graylog_host",
3499 "clog_to_graylog_port",
3502 "clog_to_syslog_facility",
3503 "clog_to_syslog_level",
3506 "mds_bal_fragment_dirs",
3507 "mds_bal_fragment_interval",
3508 "mds_cache_memory_limit",
3510 "mds_cache_reservation",
3511 "mds_cache_trim_decay_rate",
3512 "mds_cap_revoke_eviction_timeout",
3513 "mds_dump_cache_threshold_file",
3514 "mds_dump_cache_threshold_formatter",
3515 "mds_enable_op_tracker",
3516 "mds_health_cache_threshold",
3517 "mds_inject_migrator_session_race",
3519 "mds_max_export_size",
3520 "mds_max_purge_files",
3521 "mds_forward_all_requests_to_auth",
3522 "mds_max_purge_ops",
3523 "mds_max_purge_ops_per_pg",
3524 "mds_max_snaps_per_dir",
3525 "mds_op_complaint_time",
3526 "mds_op_history_duration",
3527 "mds_op_history_size",
3528 "mds_op_log_threshold",
3529 "mds_recall_max_decay_rate",
3530 "mds_recall_warning_decay_rate",
3531 "mds_request_load_average_decay_rate",
3532 "mds_session_cache_liveness_decay_rate",
3533 "mds_replay_unsafe_with_closed_session",
3539 void MDSRankDispatcher::handle_conf_change(const ConfigProxy
& conf
, const std::set
<std::string
>& changed
)
3541 // XXX with or without mds_lock!
3543 if (changed
.count("mds_op_complaint_time") || changed
.count("mds_op_log_threshold")) {
3544 op_tracker
.set_complaint_and_threshold(conf
->mds_op_complaint_time
, conf
->mds_op_log_threshold
);
3546 if (changed
.count("mds_op_history_size") || changed
.count("mds_op_history_duration")) {
3547 op_tracker
.set_history_size_and_duration(conf
->mds_op_history_size
, conf
->mds_op_history_duration
);
3549 if (changed
.count("mds_enable_op_tracker")) {
3550 op_tracker
.set_tracking(conf
->mds_enable_op_tracker
);
3552 if (changed
.count("clog_to_monitors") ||
3553 changed
.count("clog_to_syslog") ||
3554 changed
.count("clog_to_syslog_level") ||
3555 changed
.count("clog_to_syslog_facility") ||
3556 changed
.count("clog_to_graylog") ||
3557 changed
.count("clog_to_graylog_host") ||
3558 changed
.count("clog_to_graylog_port") ||
3559 changed
.count("host") ||
3560 changed
.count("fsid")) {
3561 update_log_config();
3564 finisher
->queue(new LambdaContext([this, changed
](int) {
3565 std::scoped_lock
lock(mds_lock
);
3567 if (changed
.count("mds_log_pause") && !g_conf()->mds_log_pause
) {
3568 mdlog
->kick_submitter();
3570 sessionmap
.handle_conf_change(changed
);
3571 server
->handle_conf_change(changed
);
3572 mdcache
->handle_conf_change(changed
, *mdsmap
);
3573 purge_queue
.handle_conf_change(changed
, *mdsmap
);
3577 void MDSRank::get_task_status(std::map
<std::string
, std::string
> *status
) {
3578 dout(20) << __func__
<< dendl
;
3580 // scrub summary for now..
3581 std::string_view scrub_summary
= scrubstack
->scrub_summary();
3582 status
->emplace(SCRUB_STATUS_KEY
, std::move(scrub_summary
));
3585 void MDSRank::schedule_update_timer_task() {
3586 dout(20) << __func__
<< dendl
;
3588 timer
.add_event_after(g_conf().get_val
<double>("mds_task_status_update_interval"),
3589 new LambdaContext([this](int) {
3594 void MDSRank::send_task_status() {
3595 std::map
<std::string
, std::string
> status
;
3596 get_task_status(&status
);
3598 if (!status
.empty()) {
3599 dout(20) << __func__
<< ": updating " << status
.size() << " status keys" << dendl
;
3601 int r
= mgrc
->service_daemon_update_task_status(std::move(status
));
3603 derr
<< ": failed to update service daemon status: " << cpp_strerror(r
) << dendl
;
3607 schedule_update_timer_task();