1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "InstanceWatcher.h"
5 #include "include/stringify.h"
6 #include "common/debug.h"
7 #include "common/errno.h"
8 #include "cls/rbd/cls_rbd_client.h"
9 #include "librbd/ManagedLock.h"
10 #include "librbd/Utils.h"
11 #include "InstanceReplayer.h"
12 #include "ImageSyncThrottler.h"
14 #define dout_context g_ceph_context
15 #define dout_subsys ceph_subsys_rbd_mirror
17 #define dout_prefix *_dout << "rbd::mirror::InstanceWatcher: "
22 using namespace instance_watcher
;
24 using librbd::util::create_async_context_callback
;
25 using librbd::util::create_context_callback
;
26 using librbd::util::create_rados_callback
;
27 using librbd::util::unique_lock_name
;
31 struct C_GetInstances
: public Context
{
32 std::vector
<std::string
> *instance_ids
;
36 C_GetInstances(std::vector
<std::string
> *instance_ids
, Context
*on_finish
)
37 : instance_ids(instance_ids
), on_finish(on_finish
) {
40 void finish(int r
) override
{
41 dout(20) << "C_GetInstances: " << this << " " << __func__
<< ": r=" << r
45 bufferlist::iterator it
= out_bl
.begin();
46 r
= librbd::cls_client::mirror_instances_list_finish(&it
, instance_ids
);
47 } else if (r
== -ENOENT
) {
50 on_finish
->complete(r
);
55 struct C_RemoveInstanceRequest
: public Context
{
56 InstanceWatcher
<I
> instance_watcher
;
59 C_RemoveInstanceRequest(librados::IoCtx
&io_ctx
, ContextWQ
*work_queue
,
60 const std::string
&instance_id
, Context
*on_finish
)
61 : instance_watcher(io_ctx
, work_queue
, nullptr, instance_id
),
62 on_finish(on_finish
) {
66 dout(20) << "C_RemoveInstanceRequest: " << this << " " << __func__
<< dendl
;
68 instance_watcher
.remove(this);
71 void finish(int r
) override
{
72 dout(20) << "C_RemoveInstanceRequest: " << this << " " << __func__
<< ": r="
76 on_finish
->complete(r
);
80 } // anonymous namespace
83 struct InstanceWatcher
<I
>::C_NotifyInstanceRequest
: public Context
{
84 InstanceWatcher
<I
> *instance_watcher
;
85 std::string instance_id
;
90 std::unique_ptr
<librbd::watcher::Notifier
> notifier
;
91 librbd::watcher::NotifyResponse response
;
92 bool canceling
= false;
94 C_NotifyInstanceRequest(InstanceWatcher
<I
> *instance_watcher
,
95 const std::string
&instance_id
, uint64_t request_id
,
96 bufferlist
&&bl
, Context
*on_finish
)
97 : instance_watcher(instance_watcher
), instance_id(instance_id
),
98 request_id(request_id
), bl(bl
), on_finish(on_finish
),
99 send_to_leader(instance_id
.empty()) {
100 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
101 << ": instance_watcher=" << instance_watcher
<< ", instance_id="
102 << instance_id
<< ", request_id=" << request_id
<< dendl
;
104 assert(instance_watcher
->m_lock
.is_locked());
106 if (!send_to_leader
) {
107 assert((!instance_id
.empty()));
108 notifier
.reset(new librbd::watcher::Notifier(
109 instance_watcher
->m_work_queue
,
110 instance_watcher
->m_ioctx
,
111 RBD_MIRROR_INSTANCE_PREFIX
+ instance_id
));
114 instance_watcher
->m_notify_op_tracker
.start_op();
115 auto result
= instance_watcher
->m_notify_ops
.insert(
116 std::make_pair(instance_id
, this)).second
;
121 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
<< dendl
;
123 assert(instance_watcher
->m_lock
.is_locked());
126 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
127 << ": canceling" << dendl
;
128 instance_watcher
->m_work_queue
->queue(this, -ECANCELED
);
132 if (send_to_leader
) {
133 if (instance_watcher
->m_leader_instance_id
.empty()) {
134 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
135 << ": suspending" << dendl
;
136 instance_watcher
->suspend_notify_request(this);
140 if (instance_watcher
->m_leader_instance_id
!= instance_id
) {
141 auto count
= instance_watcher
->m_notify_ops
.erase(
142 std::make_pair(instance_id
, this));
145 instance_id
= instance_watcher
->m_leader_instance_id
;
147 auto result
= instance_watcher
->m_notify_ops
.insert(
148 std::make_pair(instance_id
, this)).second
;
151 notifier
.reset(new librbd::watcher::Notifier(
152 instance_watcher
->m_work_queue
,
153 instance_watcher
->m_ioctx
,
154 RBD_MIRROR_INSTANCE_PREFIX
+ instance_id
));
158 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
159 << ": sending to " << instance_id
<< dendl
;
160 notifier
->notify(bl
, &response
, this);
164 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
<< dendl
;
166 assert(instance_watcher
->m_lock
.is_locked());
169 instance_watcher
->unsuspend_notify_request(this);
172 void finish(int r
) override
{
173 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
<< ": r="
176 if (r
== 0 || r
== -ETIMEDOUT
) {
178 for (auto &it
: response
.acks
) {
179 auto &bl
= it
.second
;
180 if (it
.second
.length() == 0) {
181 dout(20) << "C_NotifyInstanceRequest: " << this << " " << __func__
182 << ": no payload in ack, ignoring" << dendl
;
186 auto iter
= bl
.begin();
187 NotifyAckPayload ack
;
189 if (ack
.instance_id
!= instance_watcher
->get_instance_id()) {
190 derr
<< "C_NotifyInstanceRequest: " << this << " " << __func__
191 << ": ack instance_id (" << ack
.instance_id
<< ") "
192 << "does not match, ignoring" << dendl
;
195 if (ack
.request_id
!= request_id
) {
196 derr
<< "C_NotifyInstanceRequest: " << this << " " << __func__
197 << ": ack request_id (" << ack
.request_id
<< ") "
198 << "does not match, ignoring" << dendl
;
204 } catch (const buffer::error
&err
) {
205 derr
<< "C_NotifyInstanceRequest: " << this << " " << __func__
206 << ": failed to decode ack: " << err
.what() << dendl
;
212 if (r
== -ETIMEDOUT
) {
213 derr
<< "C_NotifyInstanceRequest: " << this << " " << __func__
214 << ": resending after timeout" << dendl
;
215 Mutex::Locker
locker(instance_watcher
->m_lock
);
222 if (r
== -ESTALE
&& send_to_leader
) {
223 derr
<< "C_NotifyInstanceRequest: " << this << " " << __func__
224 << ": resending due to leader change" << dendl
;
225 Mutex::Locker
locker(instance_watcher
->m_lock
);
232 on_finish
->complete(r
);
235 Mutex::Locker
locker(instance_watcher
->m_lock
);
236 auto result
= instance_watcher
->m_notify_ops
.erase(
237 std::make_pair(instance_id
, this));
239 instance_watcher
->m_notify_op_tracker
.finish_op();
245 void complete(int r
) override
{
250 template <typename I
>
251 struct InstanceWatcher
<I
>::C_SyncRequest
: public Context
{
252 InstanceWatcher
<I
> *instance_watcher
;
255 Context
*on_complete
= nullptr;
256 C_NotifyInstanceRequest
*req
= nullptr;
258 C_SyncRequest(InstanceWatcher
<I
> *instance_watcher
,
259 const std::string
&sync_id
, Context
*on_start
)
260 : instance_watcher(instance_watcher
), sync_id(sync_id
),
262 dout(20) << "C_SyncRequest: " << this << " " << __func__
<< ": sync_id="
266 void finish(int r
) override
{
267 dout(20) << "C_SyncRequest: " << this << " " << __func__
<< ": r="
270 if (on_start
!= nullptr) {
271 instance_watcher
->handle_notify_sync_request(this, r
);
273 instance_watcher
->handle_notify_sync_complete(this, r
);
279 void complete(int r
) override
{
285 #define dout_prefix *_dout << "rbd::mirror::InstanceWatcher: " \
286 << this << " " << __func__ << ": "
287 template <typename I
>
288 void InstanceWatcher
<I
>::get_instances(librados::IoCtx
&io_ctx
,
289 std::vector
<std::string
> *instance_ids
,
290 Context
*on_finish
) {
291 librados::ObjectReadOperation op
;
292 librbd::cls_client::mirror_instances_list_start(&op
);
293 C_GetInstances
*ctx
= new C_GetInstances(instance_ids
, on_finish
);
294 librados::AioCompletion
*aio_comp
= create_rados_callback(ctx
);
296 int r
= io_ctx
.aio_operate(RBD_MIRROR_LEADER
, aio_comp
, &op
, &ctx
->out_bl
);
301 template <typename I
>
302 void InstanceWatcher
<I
>::remove_instance(librados::IoCtx
&io_ctx
,
303 ContextWQ
*work_queue
,
304 const std::string
&instance_id
,
305 Context
*on_finish
) {
306 auto req
= new C_RemoveInstanceRequest
<I
>(io_ctx
, work_queue
, instance_id
,
311 template <typename I
>
312 InstanceWatcher
<I
> *InstanceWatcher
<I
>::create(
313 librados::IoCtx
&io_ctx
, ContextWQ
*work_queue
,
314 InstanceReplayer
<I
> *instance_replayer
) {
315 return new InstanceWatcher
<I
>(io_ctx
, work_queue
, instance_replayer
,
316 stringify(io_ctx
.get_instance_id()));
319 template <typename I
>
320 InstanceWatcher
<I
>::InstanceWatcher(librados::IoCtx
&io_ctx
,
321 ContextWQ
*work_queue
,
322 InstanceReplayer
<I
> *instance_replayer
,
323 const std::string
&instance_id
)
324 : Watcher(io_ctx
, work_queue
, RBD_MIRROR_INSTANCE_PREFIX
+ instance_id
),
325 m_instance_replayer(instance_replayer
), m_instance_id(instance_id
),
326 m_lock(unique_lock_name("rbd::mirror::InstanceWatcher::m_lock", this)),
327 m_instance_lock(librbd::ManagedLock
<I
>::create(
328 m_ioctx
, m_work_queue
, m_oid
, this, librbd::managed_lock::EXCLUSIVE
, true,
329 m_cct
->_conf
->rbd_blacklist_expire_seconds
)) {
332 template <typename I
>
333 InstanceWatcher
<I
>::~InstanceWatcher() {
334 assert(m_notify_ops
.empty());
335 assert(m_notify_op_tracker
.empty());
336 assert(m_suspended_ops
.empty());
337 assert(m_inflight_sync_reqs
.empty());
338 assert(m_image_sync_throttler
== nullptr);
339 m_instance_lock
->destroy();
342 template <typename I
>
343 int InstanceWatcher
<I
>::init() {
344 C_SaferCond init_ctx
;
346 return init_ctx
.wait();
349 template <typename I
>
350 void InstanceWatcher
<I
>::init(Context
*on_finish
) {
351 dout(20) << "instance_id=" << m_instance_id
<< dendl
;
353 Mutex::Locker
locker(m_lock
);
355 assert(m_on_finish
== nullptr);
356 m_on_finish
= on_finish
;
362 template <typename I
>
363 void InstanceWatcher
<I
>::shut_down() {
364 C_SaferCond shut_down_ctx
;
365 shut_down(&shut_down_ctx
);
366 int r
= shut_down_ctx
.wait();
370 template <typename I
>
371 void InstanceWatcher
<I
>::shut_down(Context
*on_finish
) {
374 Mutex::Locker
locker(m_lock
);
376 assert(m_on_finish
== nullptr);
377 m_on_finish
= on_finish
;
383 template <typename I
>
384 void InstanceWatcher
<I
>::remove(Context
*on_finish
) {
387 Mutex::Locker
locker(m_lock
);
389 assert(m_on_finish
== nullptr);
390 m_on_finish
= on_finish
;
394 get_instance_locker();
397 template <typename I
>
398 void InstanceWatcher
<I
>::notify_image_acquire(
399 const std::string
&instance_id
, const std::string
&global_image_id
,
400 Context
*on_notify_ack
) {
401 dout(20) << "instance_id=" << instance_id
<< ", global_image_id="
402 << global_image_id
<< dendl
;
404 Mutex::Locker
locker(m_lock
);
406 assert(m_on_finish
== nullptr);
408 if (instance_id
== m_instance_id
) {
409 handle_image_acquire(global_image_id
, on_notify_ack
);
411 uint64_t request_id
= ++m_request_seq
;
413 ::encode(NotifyMessage
{ImageAcquirePayload
{request_id
, global_image_id
}},
415 auto req
= new C_NotifyInstanceRequest(this, instance_id
, request_id
,
416 std::move(bl
), on_notify_ack
);
421 template <typename I
>
422 void InstanceWatcher
<I
>::notify_image_release(
423 const std::string
&instance_id
, const std::string
&global_image_id
,
424 Context
*on_notify_ack
) {
425 dout(20) << "instance_id=" << instance_id
<< ", global_image_id="
426 << global_image_id
<< dendl
;
428 Mutex::Locker
locker(m_lock
);
430 assert(m_on_finish
== nullptr);
432 if (instance_id
== m_instance_id
) {
433 handle_image_release(global_image_id
, on_notify_ack
);
435 uint64_t request_id
= ++m_request_seq
;
437 ::encode(NotifyMessage
{ImageReleasePayload
{request_id
, global_image_id
}},
439 auto req
= new C_NotifyInstanceRequest(this, instance_id
, request_id
,
440 std::move(bl
), on_notify_ack
);
445 template <typename I
>
446 void InstanceWatcher
<I
>::notify_peer_image_removed(
447 const std::string
&instance_id
, const std::string
&global_image_id
,
448 const std::string
&peer_mirror_uuid
, Context
*on_notify_ack
) {
449 dout(20) << "instance_id=" << instance_id
<< ", "
450 << "global_image_id=" << global_image_id
<< ", "
451 << "peer_mirror_uuid=" << peer_mirror_uuid
<< dendl
;
453 Mutex::Locker
locker(m_lock
);
454 assert(m_on_finish
== nullptr);
456 if (instance_id
== m_instance_id
) {
457 handle_peer_image_removed(global_image_id
, peer_mirror_uuid
, on_notify_ack
);
459 uint64_t request_id
= ++m_request_seq
;
461 ::encode(NotifyMessage
{PeerImageRemovedPayload
{request_id
, global_image_id
,
462 peer_mirror_uuid
}}, bl
);
463 auto req
= new C_NotifyInstanceRequest(this, instance_id
, request_id
,
464 std::move(bl
), on_notify_ack
);
469 template <typename I
>
470 void InstanceWatcher
<I
>::notify_sync_request(const std::string
&sync_id
,
471 Context
*on_sync_start
) {
472 dout(20) << "sync_id=" << sync_id
<< dendl
;
474 Mutex::Locker
locker(m_lock
);
476 assert(m_inflight_sync_reqs
.count(sync_id
) == 0);
478 uint64_t request_id
= ++m_request_seq
;
481 ::encode(NotifyMessage
{SyncRequestPayload
{request_id
, sync_id
}}, bl
);
483 auto sync_ctx
= new C_SyncRequest(this, sync_id
, on_sync_start
);
484 sync_ctx
->req
= new C_NotifyInstanceRequest(this, "", request_id
,
485 std::move(bl
), sync_ctx
);
487 m_inflight_sync_reqs
[sync_id
] = sync_ctx
;
488 sync_ctx
->req
->send();
491 template <typename I
>
492 bool InstanceWatcher
<I
>::cancel_sync_request(const std::string
&sync_id
) {
493 dout(20) << "sync_id=" << sync_id
<< dendl
;
495 Mutex::Locker
locker(m_lock
);
497 auto it
= m_inflight_sync_reqs
.find(sync_id
);
498 if (it
== m_inflight_sync_reqs
.end()) {
502 auto sync_ctx
= it
->second
;
504 if (sync_ctx
->on_start
== nullptr) {
508 assert(sync_ctx
->req
!= nullptr);
509 sync_ctx
->req
->cancel();
513 template <typename I
>
514 void InstanceWatcher
<I
>::notify_sync_start(const std::string
&instance_id
,
515 const std::string
&sync_id
) {
516 dout(20) << "sync_id=" << sync_id
<< dendl
;
518 Mutex::Locker
locker(m_lock
);
520 uint64_t request_id
= ++m_request_seq
;
523 ::encode(NotifyMessage
{SyncStartPayload
{request_id
, sync_id
}}, bl
);
525 auto ctx
= new FunctionContext(
526 [this, sync_id
] (int r
) {
527 dout(20) << "finish: sync_id=" << sync_id
<< ", r=" << r
<< dendl
;
528 Mutex::Locker
locker(m_lock
);
529 if (r
!= -ESTALE
&& m_image_sync_throttler
!= nullptr) {
530 m_image_sync_throttler
->finish_op(sync_id
);
533 auto req
= new C_NotifyInstanceRequest(this, instance_id
, request_id
,
538 template <typename I
>
539 void InstanceWatcher
<I
>::notify_sync_complete(const std::string
&sync_id
) {
540 dout(20) << "sync_id=" << sync_id
<< dendl
;
542 Mutex::Locker
locker(m_lock
);
544 auto it
= m_inflight_sync_reqs
.find(sync_id
);
545 assert(it
!= m_inflight_sync_reqs
.end());
547 auto sync_ctx
= it
->second
;
548 assert(sync_ctx
->req
== nullptr);
550 m_inflight_sync_reqs
.erase(it
);
551 m_work_queue
->queue(sync_ctx
, 0);
554 template <typename I
>
555 void InstanceWatcher
<I
>::handle_notify_sync_request(C_SyncRequest
*sync_ctx
,
557 dout(20) << "sync_id=" << sync_ctx
->sync_id
<< ", r=" << r
<< dendl
;
559 Context
*on_start
= nullptr;
561 Mutex::Locker
locker(m_lock
);
563 assert(sync_ctx
->req
!= nullptr);
564 assert(sync_ctx
->on_start
!= nullptr);
566 if (sync_ctx
->req
->canceling
) {
570 std::swap(sync_ctx
->on_start
, on_start
);
571 sync_ctx
->req
= nullptr;
574 on_start
->complete(r
== -ECANCELED
? r
: 0);
576 if (r
== -ECANCELED
) {
577 notify_sync_complete(sync_ctx
->sync_id
);
581 template <typename I
>
582 void InstanceWatcher
<I
>::handle_notify_sync_complete(C_SyncRequest
*sync_ctx
,
584 dout(20) << "sync_id=" << sync_ctx
->sync_id
<< ", r=" << r
<< dendl
;
586 if (sync_ctx
->on_complete
!= nullptr) {
587 sync_ctx
->on_complete
->complete(r
);
591 template <typename I
>
592 void InstanceWatcher
<I
>::print_sync_status(Formatter
*f
, stringstream
*ss
) {
595 Mutex::Locker
locker(m_lock
);
596 if (m_image_sync_throttler
!= nullptr) {
597 m_image_sync_throttler
->print_status(f
, ss
);
601 template <typename I
>
602 void InstanceWatcher
<I
>::handle_acquire_leader() {
605 Mutex::Locker
locker(m_lock
);
607 assert(m_image_sync_throttler
== nullptr);
608 m_image_sync_throttler
= ImageSyncThrottler
<I
>::create();
610 m_leader_instance_id
= m_instance_id
;
611 unsuspend_notify_requests();
614 template <typename I
>
615 void InstanceWatcher
<I
>::handle_release_leader() {
618 Mutex::Locker
locker(m_lock
);
620 assert(m_image_sync_throttler
!= nullptr);
622 m_leader_instance_id
.clear();
624 m_image_sync_throttler
->drain(-ESTALE
);
625 m_image_sync_throttler
->destroy();
626 m_image_sync_throttler
= nullptr;
629 template <typename I
>
630 void InstanceWatcher
<I
>::handle_update_leader(
631 const std::string
&leader_instance_id
) {
632 dout(20) << "leader_instance_id=" << leader_instance_id
<< dendl
;
634 Mutex::Locker
locker(m_lock
);
636 m_leader_instance_id
= leader_instance_id
;
638 if (!m_leader_instance_id
.empty()) {
639 unsuspend_notify_requests();
643 template <typename I
>
644 void InstanceWatcher
<I
>::cancel_notify_requests(
645 const std::string
&instance_id
) {
646 dout(20) << "instance_id=" << instance_id
<< dendl
;
648 Mutex::Locker
locker(m_lock
);
650 for (auto op
: m_notify_ops
) {
651 if (op
.first
== instance_id
&& !op
.second
->send_to_leader
) {
657 template <typename I
>
658 void InstanceWatcher
<I
>::register_instance() {
659 assert(m_lock
.is_locked());
663 librados::ObjectWriteOperation op
;
664 librbd::cls_client::mirror_instances_add(&op
, m_instance_id
);
665 librados::AioCompletion
*aio_comp
= create_rados_callback
<
666 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_register_instance
>(this);
668 int r
= m_ioctx
.aio_operate(RBD_MIRROR_LEADER
, aio_comp
, &op
);
673 template <typename I
>
674 void InstanceWatcher
<I
>::handle_register_instance(int r
) {
675 dout(20) << "r=" << r
<< dendl
;
677 Context
*on_finish
= nullptr;
679 Mutex::Locker
locker(m_lock
);
682 create_instance_object();
686 derr
<< "error registering instance: " << cpp_strerror(r
) << dendl
;
688 std::swap(on_finish
, m_on_finish
);
690 on_finish
->complete(r
);
694 template <typename I
>
695 void InstanceWatcher
<I
>::create_instance_object() {
698 assert(m_lock
.is_locked());
700 librados::ObjectWriteOperation op
;
703 librados::AioCompletion
*aio_comp
= create_rados_callback
<
705 &InstanceWatcher
<I
>::handle_create_instance_object
>(this);
706 int r
= m_ioctx
.aio_operate(m_oid
, aio_comp
, &op
);
711 template <typename I
>
712 void InstanceWatcher
<I
>::handle_create_instance_object(int r
) {
713 dout(20) << "r=" << r
<< dendl
;
715 Mutex::Locker
locker(m_lock
);
718 derr
<< "error creating " << m_oid
<< " object: " << cpp_strerror(r
)
722 unregister_instance();
729 template <typename I
>
730 void InstanceWatcher
<I
>::register_watch() {
733 assert(m_lock
.is_locked());
735 Context
*ctx
= create_async_context_callback(
736 m_work_queue
, create_context_callback
<
737 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_register_watch
>(this));
739 librbd::Watcher::register_watch(ctx
);
742 template <typename I
>
743 void InstanceWatcher
<I
>::handle_register_watch(int r
) {
744 dout(20) << "r=" << r
<< dendl
;
746 Mutex::Locker
locker(m_lock
);
749 derr
<< "error registering instance watcher for " << m_oid
<< " object: "
750 << cpp_strerror(r
) << dendl
;
753 remove_instance_object();
760 template <typename I
>
761 void InstanceWatcher
<I
>::acquire_lock() {
764 assert(m_lock
.is_locked());
766 Context
*ctx
= create_async_context_callback(
767 m_work_queue
, create_context_callback
<
768 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_acquire_lock
>(this));
770 m_instance_lock
->acquire_lock(ctx
);
773 template <typename I
>
774 void InstanceWatcher
<I
>::handle_acquire_lock(int r
) {
775 dout(20) << "r=" << r
<< dendl
;
777 Context
*on_finish
= nullptr;
779 Mutex::Locker
locker(m_lock
);
783 derr
<< "error acquiring instance lock: " << cpp_strerror(r
) << dendl
;
790 std::swap(on_finish
, m_on_finish
);
793 on_finish
->complete(r
);
796 template <typename I
>
797 void InstanceWatcher
<I
>::release_lock() {
800 assert(m_lock
.is_locked());
802 Context
*ctx
= create_async_context_callback(
803 m_work_queue
, create_context_callback
<
804 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_release_lock
>(this));
806 m_instance_lock
->shut_down(ctx
);
809 template <typename I
>
810 void InstanceWatcher
<I
>::handle_release_lock(int r
) {
811 dout(20) << "r=" << r
<< dendl
;
813 Mutex::Locker
locker(m_lock
);
816 derr
<< "error releasing instance lock: " << cpp_strerror(r
) << dendl
;
822 template <typename I
>
823 void InstanceWatcher
<I
>::unregister_watch() {
826 assert(m_lock
.is_locked());
828 Context
*ctx
= create_async_context_callback(
829 m_work_queue
, create_context_callback
<
830 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_unregister_watch
>(this));
832 librbd::Watcher::unregister_watch(ctx
);
835 template <typename I
>
836 void InstanceWatcher
<I
>::handle_unregister_watch(int r
) {
837 dout(20) << "r=" << r
<< dendl
;
840 derr
<< "error unregistering instance watcher for " << m_oid
<< " object: "
841 << cpp_strerror(r
) << dendl
;
844 Mutex::Locker
locker(m_lock
);
845 remove_instance_object();
848 template <typename I
>
849 void InstanceWatcher
<I
>::remove_instance_object() {
850 assert(m_lock
.is_locked());
854 librados::ObjectWriteOperation op
;
857 librados::AioCompletion
*aio_comp
= create_rados_callback
<
859 &InstanceWatcher
<I
>::handle_remove_instance_object
>(this);
860 int r
= m_ioctx
.aio_operate(m_oid
, aio_comp
, &op
);
865 template <typename I
>
866 void InstanceWatcher
<I
>::handle_remove_instance_object(int r
) {
867 dout(20) << "r=" << r
<< dendl
;
869 if (m_removing
&& r
== -ENOENT
) {
874 derr
<< "error removing " << m_oid
<< " object: " << cpp_strerror(r
)
878 Mutex::Locker
locker(m_lock
);
879 unregister_instance();
882 template <typename I
>
883 void InstanceWatcher
<I
>::unregister_instance() {
886 assert(m_lock
.is_locked());
888 librados::ObjectWriteOperation op
;
889 librbd::cls_client::mirror_instances_remove(&op
, m_instance_id
);
890 librados::AioCompletion
*aio_comp
= create_rados_callback
<
891 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_unregister_instance
>(this);
893 int r
= m_ioctx
.aio_operate(RBD_MIRROR_LEADER
, aio_comp
, &op
);
898 template <typename I
>
899 void InstanceWatcher
<I
>::handle_unregister_instance(int r
) {
900 dout(20) << "r=" << r
<< dendl
;
903 derr
<< "error unregistering instance: " << cpp_strerror(r
) << dendl
;
906 Mutex::Locker
locker(m_lock
);
907 wait_for_notify_ops();
910 template <typename I
>
911 void InstanceWatcher
<I
>::wait_for_notify_ops() {
914 assert(m_lock
.is_locked());
916 for (auto op
: m_notify_ops
) {
920 Context
*ctx
= create_async_context_callback(
921 m_work_queue
, create_context_callback
<
922 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_wait_for_notify_ops
>(this));
924 m_notify_op_tracker
.wait_for_ops(ctx
);
927 template <typename I
>
928 void InstanceWatcher
<I
>::handle_wait_for_notify_ops(int r
) {
929 dout(20) << "r=" << r
<< dendl
;
933 Context
*on_finish
= nullptr;
935 Mutex::Locker
locker(m_lock
);
937 assert(m_notify_ops
.empty());
939 std::swap(on_finish
, m_on_finish
);
946 on_finish
->complete(r
);
949 template <typename I
>
950 void InstanceWatcher
<I
>::get_instance_locker() {
953 assert(m_lock
.is_locked());
955 Context
*ctx
= create_async_context_callback(
956 m_work_queue
, create_context_callback
<
957 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_get_instance_locker
>(this));
959 m_instance_lock
->get_locker(&m_instance_locker
, ctx
);
962 template <typename I
>
963 void InstanceWatcher
<I
>::handle_get_instance_locker(int r
) {
964 dout(20) << "r=" << r
<< dendl
;
966 Mutex::Locker
locker(m_lock
);
970 derr
<< "error retrieving instance locker: " << cpp_strerror(r
) << dendl
;
972 remove_instance_object();
976 break_instance_lock();
979 template <typename I
>
980 void InstanceWatcher
<I
>::break_instance_lock() {
983 assert(m_lock
.is_locked());
985 Context
*ctx
= create_async_context_callback(
986 m_work_queue
, create_context_callback
<
987 InstanceWatcher
<I
>, &InstanceWatcher
<I
>::handle_break_instance_lock
>(this));
989 m_instance_lock
->break_lock(m_instance_locker
, true, ctx
);
992 template <typename I
>
993 void InstanceWatcher
<I
>::handle_break_instance_lock(int r
) {
994 dout(20) << "r=" << r
<< dendl
;
996 Mutex::Locker
locker(m_lock
);
1000 derr
<< "error breaking instance lock: " << cpp_strerror(r
) << dendl
;
1002 remove_instance_object();
1006 remove_instance_object();
1009 template <typename I
>
1010 void InstanceWatcher
<I
>::suspend_notify_request(C_NotifyInstanceRequest
*req
) {
1011 dout(20) << req
<< dendl
;
1013 assert(m_lock
.is_locked());
1015 auto result
= m_suspended_ops
.insert(req
).second
;
1019 template <typename I
>
1020 bool InstanceWatcher
<I
>::unsuspend_notify_request(
1021 C_NotifyInstanceRequest
*req
) {
1022 dout(20) << req
<< dendl
;
1024 assert(m_lock
.is_locked());
1026 auto result
= m_suspended_ops
.erase(req
);
1035 template <typename I
>
1036 void InstanceWatcher
<I
>::unsuspend_notify_requests() {
1039 assert(m_lock
.is_locked());
1041 std::set
<C_NotifyInstanceRequest
*> suspended_ops
;
1042 std::swap(m_suspended_ops
, suspended_ops
);
1044 for (auto op
: suspended_ops
) {
1049 template <typename I
>
1050 Context
*InstanceWatcher
<I
>::prepare_request(const std::string
&instance_id
,
1051 uint64_t request_id
,
1052 C_NotifyAck
*on_notify_ack
) {
1053 dout(20) << "instance_id=" << instance_id
<< ", request_id=" << request_id
1056 Mutex::Locker
locker(m_lock
);
1058 Context
*ctx
= nullptr;
1059 Request
request(instance_id
, request_id
);
1060 auto it
= m_requests
.find(request
);
1062 if (it
!= m_requests
.end()) {
1063 dout(20) << "duplicate for in-progress request" << dendl
;
1064 delete it
->on_notify_ack
;
1065 m_requests
.erase(it
);
1067 ctx
= create_async_context_callback(
1068 m_work_queue
, new FunctionContext(
1069 [this, instance_id
, request_id
] (int r
) {
1070 complete_request(instance_id
, request_id
, r
);
1074 request
.on_notify_ack
= on_notify_ack
;
1075 m_requests
.insert(request
);
1079 template <typename I
>
1080 void InstanceWatcher
<I
>::complete_request(const std::string
&instance_id
,
1081 uint64_t request_id
, int r
) {
1082 dout(20) << "instance_id=" << instance_id
<< ", request_id=" << request_id
1085 C_NotifyAck
*on_notify_ack
;
1087 Mutex::Locker
locker(m_lock
);
1088 Request
request(instance_id
, request_id
);
1089 auto it
= m_requests
.find(request
);
1090 assert(it
!= m_requests
.end());
1091 on_notify_ack
= it
->on_notify_ack
;
1092 m_requests
.erase(it
);
1095 ::encode(NotifyAckPayload(instance_id
, request_id
, r
), on_notify_ack
->out
);
1096 on_notify_ack
->complete(0);
1099 template <typename I
>
1100 void InstanceWatcher
<I
>::handle_notify(uint64_t notify_id
, uint64_t handle
,
1101 uint64_t notifier_id
, bufferlist
&bl
) {
1102 dout(20) << "notify_id=" << notify_id
<< ", handle=" << handle
<< ", "
1103 << "notifier_id=" << notifier_id
<< dendl
;
1105 auto ctx
= new C_NotifyAck(this, notify_id
, handle
);
1107 NotifyMessage notify_message
;
1109 bufferlist::iterator iter
= bl
.begin();
1110 ::decode(notify_message
, iter
);
1111 } catch (const buffer::error
&err
) {
1112 derr
<< "error decoding image notification: " << err
.what() << dendl
;
1117 apply_visitor(HandlePayloadVisitor(this, stringify(notifier_id
), ctx
),
1118 notify_message
.payload
);
1121 template <typename I
>
1122 void InstanceWatcher
<I
>::handle_image_acquire(
1123 const std::string
&global_image_id
, Context
*on_finish
) {
1124 dout(20) << "global_image_id=" << global_image_id
<< dendl
;
1126 auto ctx
= new FunctionContext(
1127 [this, global_image_id
, on_finish
] (int r
) {
1128 m_instance_replayer
->acquire_image(this, global_image_id
, on_finish
);
1129 m_notify_op_tracker
.finish_op();
1132 m_notify_op_tracker
.start_op();
1133 m_work_queue
->queue(ctx
, 0);
1136 template <typename I
>
1137 void InstanceWatcher
<I
>::handle_image_release(
1138 const std::string
&global_image_id
, Context
*on_finish
) {
1139 dout(20) << "global_image_id=" << global_image_id
<< dendl
;
1141 auto ctx
= new FunctionContext(
1142 [this, global_image_id
, on_finish
] (int r
) {
1143 m_instance_replayer
->release_image(global_image_id
, on_finish
);
1144 m_notify_op_tracker
.finish_op();
1147 m_notify_op_tracker
.start_op();
1148 m_work_queue
->queue(ctx
, 0);
1151 template <typename I
>
1152 void InstanceWatcher
<I
>::handle_peer_image_removed(
1153 const std::string
&global_image_id
, const std::string
&peer_mirror_uuid
,
1154 Context
*on_finish
) {
1155 dout(20) << "global_image_id=" << global_image_id
<< ", "
1156 << "peer_mirror_uuid=" << peer_mirror_uuid
<< dendl
;
1158 auto ctx
= new FunctionContext(
1159 [this, peer_mirror_uuid
, global_image_id
, on_finish
] (int r
) {
1160 m_instance_replayer
->remove_peer_image(global_image_id
,
1161 peer_mirror_uuid
, on_finish
);
1162 m_notify_op_tracker
.finish_op();
1165 m_notify_op_tracker
.start_op();
1166 m_work_queue
->queue(ctx
, 0);
1169 template <typename I
>
1170 void InstanceWatcher
<I
>::handle_sync_request(const std::string
&instance_id
,
1171 const std::string
&sync_id
,
1172 Context
*on_finish
) {
1173 dout(20) << "instance_id=" << instance_id
<< ", sync_id=" << sync_id
<< dendl
;
1175 Mutex::Locker
locker(m_lock
);
1177 if (m_image_sync_throttler
== nullptr) {
1178 dout(20) << "sync request for non-leader" << dendl
;
1179 m_work_queue
->queue(on_finish
, -ESTALE
);
1183 Context
*on_start
= create_async_context_callback(
1184 m_work_queue
, new FunctionContext(
1185 [this, instance_id
, sync_id
, on_finish
] (int r
) {
1186 dout(20) << "handle_sync_request: finish: instance_id=" << instance_id
1187 << ", sync_id=" << sync_id
<< ", r=" << r
<< dendl
;
1189 notify_sync_start(instance_id
, sync_id
);
1191 on_finish
->complete(r
);
1193 m_image_sync_throttler
->start_op(sync_id
, on_start
);
1196 template <typename I
>
1197 void InstanceWatcher
<I
>::handle_sync_start(const std::string
&instance_id
,
1198 const std::string
&sync_id
,
1199 Context
*on_finish
) {
1200 dout(20) << "instance_id=" << instance_id
<< ", sync_id=" << sync_id
<< dendl
;
1202 Mutex::Locker
locker(m_lock
);
1204 auto it
= m_inflight_sync_reqs
.find(sync_id
);
1205 if (it
== m_inflight_sync_reqs
.end()) {
1206 dout(20) << "not found" << dendl
;
1207 m_work_queue
->queue(on_finish
, 0);
1211 auto sync_ctx
= it
->second
;
1213 if (sync_ctx
->on_complete
!= nullptr) {
1214 dout(20) << "duplicate request" << dendl
;
1215 m_work_queue
->queue(sync_ctx
->on_complete
, -ESTALE
);
1218 sync_ctx
->on_complete
= on_finish
;
1221 template <typename I
>
1222 void InstanceWatcher
<I
>::handle_payload(const std::string
&instance_id
,
1223 const ImageAcquirePayload
&payload
,
1224 C_NotifyAck
*on_notify_ack
) {
1225 dout(20) << "image_acquire: instance_id=" << instance_id
<< ", "
1226 << "request_id=" << payload
.request_id
<< dendl
;
1228 auto on_finish
= prepare_request(instance_id
, payload
.request_id
,
1230 if (on_finish
!= nullptr) {
1231 handle_image_acquire(payload
.global_image_id
, on_finish
);
1235 template <typename I
>
1236 void InstanceWatcher
<I
>::handle_payload(const std::string
&instance_id
,
1237 const ImageReleasePayload
&payload
,
1238 C_NotifyAck
*on_notify_ack
) {
1239 dout(20) << "image_release: instance_id=" << instance_id
<< ", "
1240 << "request_id=" << payload
.request_id
<< dendl
;
1242 auto on_finish
= prepare_request(instance_id
, payload
.request_id
,
1244 if (on_finish
!= nullptr) {
1245 handle_image_release(payload
.global_image_id
, on_finish
);
1249 template <typename I
>
1250 void InstanceWatcher
<I
>::handle_payload(const std::string
&instance_id
,
1251 const PeerImageRemovedPayload
&payload
,
1252 C_NotifyAck
*on_notify_ack
) {
1253 dout(20) << "remove_peer_image: instance_id=" << instance_id
<< ", "
1254 << "request_id=" << payload
.request_id
<< dendl
;
1256 auto on_finish
= prepare_request(instance_id
, payload
.request_id
,
1258 if (on_finish
!= nullptr) {
1259 handle_peer_image_removed(payload
.global_image_id
, payload
.peer_mirror_uuid
,
1264 template <typename I
>
1265 void InstanceWatcher
<I
>::handle_payload(const std::string
&instance_id
,
1266 const SyncRequestPayload
&payload
,
1267 C_NotifyAck
*on_notify_ack
) {
1268 dout(20) << "sync_request: instance_id=" << instance_id
<< ", "
1269 << "request_id=" << payload
.request_id
<< dendl
;
1271 auto on_finish
= prepare_request(instance_id
, payload
.request_id
,
1273 if (on_finish
== nullptr) {
1277 handle_sync_request(instance_id
, payload
.sync_id
, on_finish
);
1280 template <typename I
>
1281 void InstanceWatcher
<I
>::handle_payload(const std::string
&instance_id
,
1282 const SyncStartPayload
&payload
,
1283 C_NotifyAck
*on_notify_ack
) {
1284 dout(20) << "sync_start: instance_id=" << instance_id
<< ", "
1285 << "request_id=" << payload
.request_id
<< dendl
;
1287 auto on_finish
= prepare_request(instance_id
, payload
.request_id
,
1289 if (on_finish
== nullptr) {
1293 handle_sync_start(instance_id
, payload
.sync_id
, on_finish
);
1296 template <typename I
>
1297 void InstanceWatcher
<I
>::handle_payload(const std::string
&instance_id
,
1298 const UnknownPayload
&payload
,
1299 C_NotifyAck
*on_notify_ack
) {
1300 dout(20) << "unknown: instance_id=" << instance_id
<< dendl
;
1302 on_notify_ack
->complete(0);
1305 } // namespace mirror
1308 template class rbd::mirror::InstanceWatcher
<librbd::ImageCtx
>;