+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "librbd/ImageWatcher.h"
-#include "librbd/ExclusiveLock.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/ImageState.h"
-#include "librbd/internal.h"
-#include "librbd/Operations.h"
-#include "librbd/TaskFinisher.h"
-#include "librbd/Utils.h"
-#include "librbd/exclusive_lock/Policy.h"
-#include "librbd/image_watcher/NotifyLockOwner.h"
-#include "librbd/io/AioCompletion.h"
-#include "librbd/watcher/Utils.h"
-#include "include/encoding.h"
-#include "common/errno.h"
-#include "common/WorkQueue.h"
-#include <boost/bind.hpp>
-
-#define dout_subsys ceph_subsys_rbd
-#undef dout_prefix
-#define dout_prefix *_dout << "librbd::ImageWatcher: "
-
-namespace librbd {
-
-using namespace image_watcher;
-using namespace watch_notify;
-using util::create_async_context_callback;
-using util::create_context_callback;
-using util::create_rados_callback;
-using librbd::watcher::util::HandlePayloadVisitor;
-
-static const double RETRY_DELAY_SECONDS = 1.0;
-
-template <typename I>
-struct ImageWatcher<I>::C_ProcessPayload : public Context {
- ImageWatcher *image_watcher;
- uint64_t notify_id;
- uint64_t handle;
- watch_notify::Payload payload;
-
- C_ProcessPayload(ImageWatcher *image_watcher_, uint64_t notify_id_,
- uint64_t handle_, const watch_notify::Payload &payload)
- : image_watcher(image_watcher_), notify_id(notify_id_), handle(handle_),
- payload(payload) {
- }
-
- void finish(int r) override {
- image_watcher->m_async_op_tracker.start_op();
- if (image_watcher->notifications_blocked()) {
- // requests are blocked -- just ack the notification
- bufferlist bl;
- image_watcher->acknowledge_notify(notify_id, handle, bl);
- } else {
- image_watcher->process_payload(notify_id, handle, payload);
- }
- image_watcher->m_async_op_tracker.finish_op();
- }
-};
-
-template <typename I>
-ImageWatcher<I>::ImageWatcher(I &image_ctx)
- : Watcher(image_ctx.md_ctx, image_ctx.op_work_queue, image_ctx.header_oid),
- m_image_ctx(image_ctx),
- m_task_finisher(new TaskFinisher<Task>(*m_image_ctx.cct)),
- m_async_request_lock(util::unique_lock_name("librbd::ImageWatcher::m_async_request_lock", this)),
- m_owner_client_id_lock(util::unique_lock_name("librbd::ImageWatcher::m_owner_client_id_lock", this))
-{
-}
-
-template <typename I>
-ImageWatcher<I>::~ImageWatcher()
-{
- delete m_task_finisher;
-}
-
-template <typename I>
-void ImageWatcher<I>::unregister_watch(Context *on_finish) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " unregistering image watcher" << dendl;
-
- cancel_async_requests();
-
- FunctionContext *ctx = new FunctionContext([this, on_finish](int r) {
- m_task_finisher->cancel_all(on_finish);
- });
- Watcher::unregister_watch(ctx);
-}
-
-template <typename I>
-void ImageWatcher<I>::block_notifies(Context *on_finish) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << dendl;
-
- on_finish = new FunctionContext([this, on_finish](int r) {
- cancel_async_requests();
- on_finish->complete(r);
- });
- Watcher::block_notifies(on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::schedule_async_progress(const AsyncRequestId &request,
- uint64_t offset, uint64_t total) {
- FunctionContext *ctx = new FunctionContext(
- boost::bind(&ImageWatcher<I>::notify_async_progress, this, request, offset,
- total));
- m_task_finisher->queue(Task(TASK_CODE_ASYNC_PROGRESS, request), ctx);
-}
-
-template <typename I>
-int ImageWatcher<I>::notify_async_progress(const AsyncRequestId &request,
- uint64_t offset, uint64_t total) {
- ldout(m_image_ctx.cct, 20) << this << " remote async request progress: "
- << request << " @ " << offset
- << "/" << total << dendl;
-
- send_notify(AsyncProgressPayload(request, offset, total));
- return 0;
-}
-
-template <typename I>
-void ImageWatcher<I>::schedule_async_complete(const AsyncRequestId &request,
- int r) {
- FunctionContext *ctx = new FunctionContext(
- boost::bind(&ImageWatcher<I>::notify_async_complete, this, request, r));
- m_task_finisher->queue(ctx);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_async_complete(const AsyncRequestId &request,
- int r) {
- ldout(m_image_ctx.cct, 20) << this << " remote async request finished: "
- << request << " = " << r << dendl;
-
- send_notify(AsyncCompletePayload(request, r),
- new FunctionContext(boost::bind(&ImageWatcher<I>::handle_async_complete,
- this, request, r, _1)));
-}
-
-template <typename I>
-void ImageWatcher<I>::handle_async_complete(const AsyncRequestId &request,
- int r, int ret_val) {
- ldout(m_image_ctx.cct, 20) << this << " " << __func__ << ": "
- << "request=" << request << ", r=" << ret_val
- << dendl;
- if (ret_val < 0) {
- lderr(m_image_ctx.cct) << this << " failed to notify async complete: "
- << cpp_strerror(ret_val) << dendl;
- if (ret_val == -ETIMEDOUT) {
- schedule_async_complete(request, r);
- }
- } else {
- RWLock::WLocker async_request_locker(m_async_request_lock);
- m_async_pending.erase(request);
- }
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_flatten(uint64_t request_id,
- ProgressContext &prog_ctx,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- AsyncRequestId async_request_id(get_client_id(), request_id);
-
- notify_async_request(async_request_id, FlattenPayload(async_request_id),
- prog_ctx, on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_resize(uint64_t request_id, uint64_t size,
- bool allow_shrink,
- ProgressContext &prog_ctx,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- AsyncRequestId async_request_id(get_client_id(), request_id);
-
- notify_async_request(async_request_id,
- ResizePayload(size, allow_shrink, async_request_id),
- prog_ctx, on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_snap_create(const cls::rbd::SnapshotNamespace &snap_namespace,
- const std::string &snap_name,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- notify_lock_owner(SnapCreatePayload(snap_namespace, snap_name), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_snap_rename(const snapid_t &src_snap_id,
- const std::string &dst_snap_name,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- notify_lock_owner(SnapRenamePayload(src_snap_id, dst_snap_name), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_snap_remove(const cls::rbd::SnapshotNamespace &snap_namespace,
- const std::string &snap_name,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- notify_lock_owner(SnapRemovePayload(snap_namespace, snap_name), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_snap_protect(const cls::rbd::SnapshotNamespace &snap_namespace,
- const std::string &snap_name,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- notify_lock_owner(SnapProtectPayload(snap_namespace, snap_name), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_snap_unprotect(const cls::rbd::SnapshotNamespace &snap_namespace,
- const std::string &snap_name,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- notify_lock_owner(SnapUnprotectPayload(snap_namespace, snap_name), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_rebuild_object_map(uint64_t request_id,
- ProgressContext &prog_ctx,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- AsyncRequestId async_request_id(get_client_id(), request_id);
-
- notify_async_request(async_request_id,
- RebuildObjectMapPayload(async_request_id),
- prog_ctx, on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_rename(const std::string &image_name,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- notify_lock_owner(RenamePayload(image_name), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_update_features(uint64_t features, bool enabled,
- Context *on_finish) {
- assert(m_image_ctx.owner_lock.is_locked());
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- notify_lock_owner(UpdateFeaturesPayload(features, enabled), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_header_update(Context *on_finish) {
- ldout(m_image_ctx.cct, 10) << this << ": " << __func__ << dendl;
-
- // supports legacy (empty buffer) clients
- send_notify(HeaderUpdatePayload(), on_finish);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_header_update(librados::IoCtx &io_ctx,
- const std::string &oid) {
- // supports legacy (empty buffer) clients
- bufferlist bl;
- ::encode(NotifyMessage(HeaderUpdatePayload()), bl);
- io_ctx.notify2(oid, bl, watcher::Notifier::NOTIFY_TIMEOUT, nullptr);
-}
-
-template <typename I>
-void ImageWatcher<I>::schedule_cancel_async_requests() {
- FunctionContext *ctx = new FunctionContext(
- boost::bind(&ImageWatcher<I>::cancel_async_requests, this));
- m_task_finisher->queue(TASK_CODE_CANCEL_ASYNC_REQUESTS, ctx);
-}
-
-template <typename I>
-void ImageWatcher<I>::cancel_async_requests() {
- RWLock::WLocker l(m_async_request_lock);
- for (std::map<AsyncRequestId, AsyncRequest>::iterator iter =
- m_async_requests.begin();
- iter != m_async_requests.end(); ++iter) {
- iter->second.first->complete(-ERESTART);
- }
- m_async_requests.clear();
-}
-
-template <typename I>
-void ImageWatcher<I>::set_owner_client_id(const ClientId& client_id) {
- assert(m_owner_client_id_lock.is_locked());
- m_owner_client_id = client_id;
- ldout(m_image_ctx.cct, 10) << this << " current lock owner: "
- << m_owner_client_id << dendl;
-}
-
-template <typename I>
-ClientId ImageWatcher<I>::get_client_id() {
- RWLock::RLocker l(this->m_watch_lock);
- return ClientId(m_image_ctx.md_ctx.get_instance_id(), this->m_watch_handle);
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_acquired_lock() {
- ldout(m_image_ctx.cct, 10) << this << " notify acquired lock" << dendl;
-
- ClientId client_id = get_client_id();
- {
- Mutex::Locker owner_client_id_locker(m_owner_client_id_lock);
- set_owner_client_id(client_id);
- }
-
- send_notify(AcquiredLockPayload(client_id));
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_released_lock() {
- ldout(m_image_ctx.cct, 10) << this << " notify released lock" << dendl;
-
- {
- Mutex::Locker owner_client_id_locker(m_owner_client_id_lock);
- set_owner_client_id(ClientId());
- }
-
- send_notify(ReleasedLockPayload(get_client_id()));
-}
-
-template <typename I>
-void ImageWatcher<I>::schedule_request_lock(bool use_timer, int timer_delay) {
- assert(m_image_ctx.owner_lock.is_locked());
-
- if (m_image_ctx.exclusive_lock == nullptr) {
- // exclusive lock dynamically disabled via image refresh
- return;
- }
- assert(m_image_ctx.exclusive_lock &&
- !m_image_ctx.exclusive_lock->is_lock_owner());
-
- RWLock::RLocker watch_locker(this->m_watch_lock);
- if (this->m_watch_state == Watcher::WATCH_STATE_REGISTERED) {
- ldout(m_image_ctx.cct, 15) << this << " requesting exclusive lock" << dendl;
-
- FunctionContext *ctx = new FunctionContext(
- boost::bind(&ImageWatcher<I>::notify_request_lock, this));
- if (use_timer) {
- if (timer_delay < 0) {
- timer_delay = RETRY_DELAY_SECONDS;
- }
- m_task_finisher->add_event_after(TASK_CODE_REQUEST_LOCK,
- timer_delay, ctx);
- } else {
- m_task_finisher->queue(TASK_CODE_REQUEST_LOCK, ctx);
- }
- }
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_request_lock() {
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
-
- // ExclusiveLock state machine can be dynamically disabled or
- // race with task cancel
- if (m_image_ctx.exclusive_lock == nullptr ||
- m_image_ctx.exclusive_lock->is_lock_owner()) {
- return;
- }
-
- ldout(m_image_ctx.cct, 10) << this << " notify request lock" << dendl;
-
- notify_lock_owner(RequestLockPayload(get_client_id(), false),
- create_context_callback<
- ImageWatcher, &ImageWatcher<I>::handle_request_lock>(this));
-}
-
-template <typename I>
-void ImageWatcher<I>::handle_request_lock(int r) {
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
-
- // ExclusiveLock state machine cannot transition -- but can be
- // dynamically disabled
- if (m_image_ctx.exclusive_lock == nullptr) {
- return;
- }
-
- if (r == -ETIMEDOUT) {
- ldout(m_image_ctx.cct, 5) << this << " timed out requesting lock: retrying"
- << dendl;
-
- // treat this is a dead client -- so retest acquiring the lock
- m_image_ctx.exclusive_lock->handle_peer_notification(0);
- } else if (r == -EROFS) {
- ldout(m_image_ctx.cct, 5) << this << " peer will not release lock" << dendl;
- m_image_ctx.exclusive_lock->handle_peer_notification(r);
- } else if (r < 0) {
- lderr(m_image_ctx.cct) << this << " error requesting lock: "
- << cpp_strerror(r) << dendl;
- schedule_request_lock(true);
- } else {
- // lock owner acked -- but resend if we don't see them release the lock
- int retry_timeout = m_image_ctx.cct->_conf->template get_val<int64_t>(
- "client_notify_timeout");
- ldout(m_image_ctx.cct, 15) << this << " will retry in " << retry_timeout
- << " seconds" << dendl;
- schedule_request_lock(true, retry_timeout);
- }
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_lock_owner(const Payload& payload,
- Context *on_finish) {
- assert(on_finish != nullptr);
- assert(m_image_ctx.owner_lock.is_locked());
-
- bufferlist bl;
- ::encode(NotifyMessage(payload), bl);
-
- NotifyLockOwner *notify_lock_owner = NotifyLockOwner::create(
- m_image_ctx, this->m_notifier, std::move(bl), on_finish);
- notify_lock_owner->send();
-}
-
-template <typename I>
-Context *ImageWatcher<I>::remove_async_request(const AsyncRequestId &id) {
- RWLock::WLocker async_request_locker(m_async_request_lock);
- auto it = m_async_requests.find(id);
- if (it != m_async_requests.end()) {
- Context *on_complete = it->second.first;
- m_async_requests.erase(it);
- return on_complete;
- }
- return nullptr;
-}
-
-template <typename I>
-void ImageWatcher<I>::schedule_async_request_timed_out(const AsyncRequestId &id) {
- ldout(m_image_ctx.cct, 20) << "scheduling async request time out: " << id
- << dendl;
-
- Context *ctx = new FunctionContext(boost::bind(
- &ImageWatcher<I>::async_request_timed_out, this, id));
-
- Task task(TASK_CODE_ASYNC_REQUEST, id);
- m_task_finisher->cancel(task);
-
- m_task_finisher->add_event_after(task, m_image_ctx.request_timed_out_seconds,
- ctx);
-}
-
-template <typename I>
-void ImageWatcher<I>::async_request_timed_out(const AsyncRequestId &id) {
- Context *on_complete = remove_async_request(id);
- if (on_complete != nullptr) {
- ldout(m_image_ctx.cct, 5) << "async request timed out: " << id << dendl;
- m_image_ctx.op_work_queue->queue(on_complete, -ETIMEDOUT);
- }
-}
-
-template <typename I>
-void ImageWatcher<I>::notify_async_request(const AsyncRequestId &async_request_id,
- const Payload& payload,
- ProgressContext& prog_ctx,
- Context *on_finish) {
- assert(on_finish != nullptr);
- assert(m_image_ctx.owner_lock.is_locked());
-
- ldout(m_image_ctx.cct, 10) << this << " async request: " << async_request_id
- << dendl;
-
- Context *on_notify = new FunctionContext([this, async_request_id](int r) {
- if (r < 0) {
- // notification failed -- don't expect updates
- Context *on_complete = remove_async_request(async_request_id);
- if (on_complete != nullptr) {
- on_complete->complete(r);
- }
- }
- });
-
- Context *on_complete = new FunctionContext(
- [this, async_request_id, on_finish](int r) {
- m_task_finisher->cancel(Task(TASK_CODE_ASYNC_REQUEST, async_request_id));
- on_finish->complete(r);
- });
-
- {
- RWLock::WLocker async_request_locker(m_async_request_lock);
- m_async_requests[async_request_id] = AsyncRequest(on_complete, &prog_ctx);
- }
-
- schedule_async_request_timed_out(async_request_id);
- notify_lock_owner(payload, on_notify);
-}
-
-template <typename I>
-int ImageWatcher<I>::prepare_async_request(const AsyncRequestId& async_request_id,
- bool* new_request, Context** ctx,
- ProgressContext** prog_ctx) {
- if (async_request_id.client_id == get_client_id()) {
- return -ERESTART;
- } else {
- RWLock::WLocker l(m_async_request_lock);
- if (m_async_pending.count(async_request_id) == 0) {
- m_async_pending.insert(async_request_id);
- *new_request = true;
- *prog_ctx = new RemoteProgressContext(*this, async_request_id);
- *ctx = new RemoteContext(*this, async_request_id, *prog_ctx);
- } else {
- *new_request = false;
- }
- }
- return 0;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const HeaderUpdatePayload &payload,
- C_NotifyAck *ack_ctx) {
- ldout(m_image_ctx.cct, 10) << this << " image header updated" << dendl;
-
- m_image_ctx.state->handle_update_notification();
- m_image_ctx.perfcounter->inc(l_librbd_notify);
- if (ack_ctx != nullptr) {
- m_image_ctx.state->flush_update_watchers(new C_ResponseMessage(ack_ctx));
- return false;
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const AcquiredLockPayload &payload,
- C_NotifyAck *ack_ctx) {
- ldout(m_image_ctx.cct, 10) << this << " image exclusively locked announcement"
- << dendl;
-
- bool cancel_async_requests = true;
- if (payload.client_id.is_valid()) {
- Mutex::Locker owner_client_id_locker(m_owner_client_id_lock);
- if (payload.client_id == m_owner_client_id) {
- cancel_async_requests = false;
- }
- set_owner_client_id(payload.client_id);
- }
-
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- // potentially wake up the exclusive lock state machine now that
- // a lock owner has advertised itself
- m_image_ctx.exclusive_lock->handle_peer_notification(0);
- }
- if (cancel_async_requests &&
- (m_image_ctx.exclusive_lock == nullptr ||
- !m_image_ctx.exclusive_lock->is_lock_owner())) {
- schedule_cancel_async_requests();
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const ReleasedLockPayload &payload,
- C_NotifyAck *ack_ctx) {
- ldout(m_image_ctx.cct, 10) << this << " exclusive lock released" << dendl;
-
- bool cancel_async_requests = true;
- if (payload.client_id.is_valid()) {
- Mutex::Locker l(m_owner_client_id_lock);
- if (payload.client_id != m_owner_client_id) {
- ldout(m_image_ctx.cct, 10) << this << " unexpected owner: "
- << payload.client_id << " != "
- << m_owner_client_id << dendl;
- cancel_async_requests = false;
- } else {
- set_owner_client_id(ClientId());
- }
- }
-
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- if (cancel_async_requests &&
- (m_image_ctx.exclusive_lock == nullptr ||
- !m_image_ctx.exclusive_lock->is_lock_owner())) {
- schedule_cancel_async_requests();
- }
-
- // alert the exclusive lock state machine that the lock is available
- if (m_image_ctx.exclusive_lock != nullptr &&
- !m_image_ctx.exclusive_lock->is_lock_owner()) {
- m_task_finisher->cancel(TASK_CODE_REQUEST_LOCK);
- m_image_ctx.exclusive_lock->handle_peer_notification(0);
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const RequestLockPayload &payload,
- C_NotifyAck *ack_ctx) {
- ldout(m_image_ctx.cct, 10) << this << " exclusive lock requested" << dendl;
- if (payload.client_id == get_client_id()) {
- return true;
- }
-
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr &&
- m_image_ctx.exclusive_lock->is_lock_owner()) {
- int r = 0;
- bool accept_request = m_image_ctx.exclusive_lock->accept_requests(&r);
-
- if (accept_request) {
- assert(r == 0);
- Mutex::Locker owner_client_id_locker(m_owner_client_id_lock);
- if (!m_owner_client_id.is_valid()) {
- return true;
- }
-
- ldout(m_image_ctx.cct, 10) << this << " queuing release of exclusive lock"
- << dendl;
- r = m_image_ctx.get_exclusive_lock_policy()->lock_requested(
- payload.force);
- }
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const AsyncProgressPayload &payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker l(m_async_request_lock);
- std::map<AsyncRequestId, AsyncRequest>::iterator req_it =
- m_async_requests.find(payload.async_request_id);
- if (req_it != m_async_requests.end()) {
- ldout(m_image_ctx.cct, 20) << this << " request progress: "
- << payload.async_request_id << " @ "
- << payload.offset << "/" << payload.total
- << dendl;
- schedule_async_request_timed_out(payload.async_request_id);
- req_it->second.second->update_progress(payload.offset, payload.total);
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const AsyncCompletePayload &payload,
- C_NotifyAck *ack_ctx) {
- Context *on_complete = remove_async_request(payload.async_request_id);
- if (on_complete != nullptr) {
- ldout(m_image_ctx.cct, 10) << this << " request finished: "
- << payload.async_request_id << "="
- << payload.result << dendl;
- on_complete->complete(payload.result);
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const FlattenPayload &payload,
- C_NotifyAck *ack_ctx) {
-
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- bool new_request;
- Context *ctx;
- ProgressContext *prog_ctx;
- r = prepare_async_request(payload.async_request_id, &new_request,
- &ctx, &prog_ctx);
- if (r == 0 && new_request) {
- ldout(m_image_ctx.cct, 10) << this << " remote flatten request: "
- << payload.async_request_id << dendl;
- m_image_ctx.operations->execute_flatten(*prog_ctx, ctx);
- }
-
- ::encode(ResponseMessage(r), ack_ctx->out);
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const ResizePayload &payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- bool new_request;
- Context *ctx;
- ProgressContext *prog_ctx;
- r = prepare_async_request(payload.async_request_id, &new_request,
- &ctx, &prog_ctx);
- if (r == 0 && new_request) {
- ldout(m_image_ctx.cct, 10) << this << " remote resize request: "
- << payload.async_request_id << " "
- << payload.size << " "
- << payload.allow_shrink << dendl;
- m_image_ctx.operations->execute_resize(payload.size, payload.allow_shrink, *prog_ctx, ctx, 0);
- }
-
- ::encode(ResponseMessage(r), ack_ctx->out);
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const SnapCreatePayload &payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- ldout(m_image_ctx.cct, 10) << this << " remote snap_create request: "
- << payload.snap_name << dendl;
-
- m_image_ctx.operations->execute_snap_create(payload.snap_namespace,
- payload.snap_name,
- new C_ResponseMessage(ack_ctx),
- 0, false);
- return false;
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const SnapRenamePayload &payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- ldout(m_image_ctx.cct, 10) << this << " remote snap_rename request: "
- << payload.snap_id << " to "
- << payload.snap_name << dendl;
-
- m_image_ctx.operations->execute_snap_rename(payload.snap_id,
- payload.snap_name,
- new C_ResponseMessage(ack_ctx));
- return false;
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const SnapRemovePayload &payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- ldout(m_image_ctx.cct, 10) << this << " remote snap_remove request: "
- << payload.snap_name << dendl;
-
- m_image_ctx.operations->execute_snap_remove(payload.snap_namespace,
- payload.snap_name,
- new C_ResponseMessage(ack_ctx));
- return false;
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const SnapProtectPayload& payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- ldout(m_image_ctx.cct, 10) << this << " remote snap_protect request: "
- << payload.snap_name << dendl;
-
- m_image_ctx.operations->execute_snap_protect(payload.snap_namespace,
- payload.snap_name,
- new C_ResponseMessage(ack_ctx));
- return false;
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const SnapUnprotectPayload& payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- ldout(m_image_ctx.cct, 10) << this << " remote snap_unprotect request: "
- << payload.snap_name << dendl;
-
- m_image_ctx.operations->execute_snap_unprotect(payload.snap_namespace,
- payload.snap_name,
- new C_ResponseMessage(ack_ctx));
- return false;
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const RebuildObjectMapPayload& payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- bool new_request;
- Context *ctx;
- ProgressContext *prog_ctx;
- r = prepare_async_request(payload.async_request_id, &new_request,
- &ctx, &prog_ctx);
- if (r == 0 && new_request) {
- ldout(m_image_ctx.cct, 10) << this
- << " remote rebuild object map request: "
- << payload.async_request_id << dendl;
- m_image_ctx.operations->execute_rebuild_object_map(*prog_ctx, ctx);
- }
-
- ::encode(ResponseMessage(r), ack_ctx->out);
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const RenamePayload& payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- ldout(m_image_ctx.cct, 10) << this << " remote rename request: "
- << payload.image_name << dendl;
-
- m_image_ctx.operations->execute_rename(payload.image_name,
- new C_ResponseMessage(ack_ctx));
- return false;
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const UpdateFeaturesPayload& payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r)) {
- ldout(m_image_ctx.cct, 10) << this << " remote update_features request: "
- << payload.features << " "
- << (payload.enabled ? "enabled" : "disabled")
- << dendl;
-
- m_image_ctx.operations->execute_update_features(
- payload.features, payload.enabled, new C_ResponseMessage(ack_ctx), 0);
- return false;
- } else if (r < 0) {
- ::encode(ResponseMessage(r), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-bool ImageWatcher<I>::handle_payload(const UnknownPayload &payload,
- C_NotifyAck *ack_ctx) {
- RWLock::RLocker l(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- int r;
- if (m_image_ctx.exclusive_lock->accept_requests(&r) || r < 0) {
- ::encode(ResponseMessage(-EOPNOTSUPP), ack_ctx->out);
- }
- }
- return true;
-}
-
-template <typename I>
-void ImageWatcher<I>::process_payload(uint64_t notify_id, uint64_t handle,
- const Payload &payload) {
- apply_visitor(HandlePayloadVisitor<ImageWatcher<I>>(this, notify_id, handle),
- payload);
-}
-
-template <typename I>
-void ImageWatcher<I>::handle_notify(uint64_t notify_id, uint64_t handle,
- uint64_t notifier_id, bufferlist &bl) {
- NotifyMessage notify_message;
- if (bl.length() == 0) {
- // legacy notification for header updates
- notify_message = NotifyMessage(HeaderUpdatePayload());
- } else {
- try {
- bufferlist::iterator iter = bl.begin();
- ::decode(notify_message, iter);
- } catch (const buffer::error &err) {
- lderr(m_image_ctx.cct) << this << " error decoding image notification: "
- << err.what() << dendl;
- return;
- }
- }
-
- // if an image refresh is required, refresh before processing the request
- if (notify_message.check_for_refresh() &&
- m_image_ctx.state->is_refresh_required()) {
- m_image_ctx.state->refresh(new C_ProcessPayload(this, notify_id, handle,
- notify_message.payload));
- } else {
- process_payload(notify_id, handle, notify_message.payload);
- }
-}
-
-template <typename I>
-void ImageWatcher<I>::handle_error(uint64_t handle, int err) {
- lderr(m_image_ctx.cct) << this << " image watch failed: " << handle << ", "
- << cpp_strerror(err) << dendl;
-
- {
- Mutex::Locker l(m_owner_client_id_lock);
- set_owner_client_id(ClientId());
- }
-
- Watcher::handle_error(handle, err);
-}
-
-template <typename I>
-void ImageWatcher<I>::handle_rewatch_complete(int r) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
-
- {
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- if (m_image_ctx.exclusive_lock != nullptr) {
- // update the lock cookie with the new watch handle
- m_image_ctx.exclusive_lock->reacquire_lock();
- }
- }
-
- // image might have been updated while we didn't have active watch
- handle_payload(HeaderUpdatePayload(), nullptr);
-}
-
-template <typename I>
-void ImageWatcher<I>::send_notify(const Payload &payload, Context *ctx) {
- bufferlist bl;
-
- ::encode(NotifyMessage(payload), bl);
- Watcher::send_notify(bl, nullptr, ctx);
-}
-
-template <typename I>
-void ImageWatcher<I>::RemoteContext::finish(int r) {
- m_image_watcher.schedule_async_complete(m_async_request_id, r);
-}
-
-template <typename I>
-void ImageWatcher<I>::C_ResponseMessage::finish(int r) {
- CephContext *cct = notify_ack->cct;
- ldout(cct, 10) << this << " C_ResponseMessage: r=" << r << dendl;
-
- ::encode(ResponseMessage(r), notify_ack->out);
- notify_ack->complete(0);
-}
-
-} // namespace librbd
-
-template class librbd::ImageWatcher<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff