--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/exclusive_lock/PreReleaseRequest.h"
+#include "common/AsyncOpTracker.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ImageState.h"
+#include "librbd/ImageWatcher.h"
+#include "librbd/Journal.h"
+#include "librbd/ObjectMap.h"
+#include "librbd/Utils.h"
+#include "librbd/io/ImageRequestWQ.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::exclusive_lock::PreReleaseRequest: " \
+ << this << " " << __func__ << ": "
+
+namespace librbd {
+namespace exclusive_lock {
+
+using util::create_async_context_callback;
+using util::create_context_callback;
+
+template <typename I>
+PreReleaseRequest<I>* PreReleaseRequest<I>::create(
+ I &image_ctx, bool shutting_down, AsyncOpTracker &async_op_tracker,
+ Context *on_finish) {
+ return new PreReleaseRequest(image_ctx, shutting_down, async_op_tracker,
+ on_finish);
+}
+
+template <typename I>
+PreReleaseRequest<I>::PreReleaseRequest(I &image_ctx, bool shutting_down,
+ AsyncOpTracker &async_op_tracker,
+ Context *on_finish)
+ : m_image_ctx(image_ctx), m_shutting_down(shutting_down),
+ m_async_op_tracker(async_op_tracker),
+ m_on_finish(create_async_context_callback(image_ctx, on_finish)) {
+}
+
+template <typename I>
+PreReleaseRequest<I>::~PreReleaseRequest() {
+ if (!m_shutting_down) {
+ m_image_ctx.state->handle_prepare_lock_complete();
+ }
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send() {
+ send_prepare_lock();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_prepare_lock() {
+ if (m_shutting_down) {
+ send_cancel_op_requests();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ // release the lock if the image is not busy performing other actions
+ Context *ctx = create_context_callback<
+ PreReleaseRequest<I>, &PreReleaseRequest<I>::handle_prepare_lock>(this);
+ m_image_ctx.state->prepare_lock(ctx);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_prepare_lock(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << "r=" << r << dendl;
+
+ send_cancel_op_requests();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_cancel_op_requests() {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ using klass = PreReleaseRequest<I>;
+ Context *ctx = create_context_callback<
+ klass, &klass::handle_cancel_op_requests>(this);
+ m_image_ctx.cancel_async_requests(ctx);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_cancel_op_requests(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << "r=" << r << dendl;
+
+ assert(r == 0);
+
+ send_block_writes();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_block_writes() {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ using klass = PreReleaseRequest<I>;
+ Context *ctx = create_context_callback<
+ klass, &klass::handle_block_writes>(this);
+
+ {
+ RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
+ // setting the lock as required will automatically cause the IO
+ // queue to re-request the lock if any IO is queued
+ if (m_image_ctx.clone_copy_on_read ||
+ m_image_ctx.test_features(RBD_FEATURE_JOURNALING)) {
+ m_image_ctx.io_work_queue->set_require_lock(io::DIRECTION_BOTH, true);
+ } else {
+ m_image_ctx.io_work_queue->set_require_lock(io::DIRECTION_WRITE, true);
+ }
+ m_image_ctx.io_work_queue->block_writes(ctx);
+ }
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_block_writes(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << "r=" << r << dendl;
+
+ if (r == -EBLACKLISTED) {
+ // allow clean shut down if blacklisted
+ lderr(cct) << "failed to block writes because client is blacklisted"
+ << dendl;
+ } else if (r < 0) {
+ lderr(cct) << "failed to block writes: " << cpp_strerror(r) << dendl;
+ m_image_ctx.io_work_queue->unblock_writes();
+ save_result(r);
+ finish();
+ return;
+ }
+
+ send_wait_for_ops();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_wait_for_ops() {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ Context *ctx = create_context_callback<
+ PreReleaseRequest<I>, &PreReleaseRequest<I>::handle_wait_for_ops>(this);
+ m_async_op_tracker.wait_for_ops(ctx);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_wait_for_ops(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ send_invalidate_cache(false);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_invalidate_cache(bool purge_on_error) {
+ if (m_image_ctx.object_cacher == nullptr) {
+ send_flush_notifies();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << "purge_on_error=" << purge_on_error << dendl;
+
+ RWLock::RLocker owner_lock(m_image_ctx.owner_lock);
+ Context *ctx = create_async_context_callback(
+ m_image_ctx, create_context_callback<
+ PreReleaseRequest<I>,
+ &PreReleaseRequest<I>::handle_invalidate_cache>(this));
+ m_image_ctx.invalidate_cache(purge_on_error, ctx);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_invalidate_cache(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << "r=" << r << dendl;
+
+ if (r == -EBLACKLISTED) {
+ lderr(cct) << "failed to invalidate cache because client is blacklisted"
+ << dendl;
+ if (!m_image_ctx.is_cache_empty()) {
+ // force purge the cache after after being blacklisted
+ send_invalidate_cache(true);
+ return;
+ }
+ } else if (r < 0 && r != -EBUSY) {
+ lderr(cct) << "failed to invalidate cache: " << cpp_strerror(r)
+ << dendl;
+ m_image_ctx.io_work_queue->unblock_writes();
+ save_result(r);
+ finish();
+ return;
+ }
+
+ send_flush_notifies();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_flush_notifies() {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ using klass = PreReleaseRequest<I>;
+ Context *ctx =
+ create_context_callback<klass, &klass::handle_flush_notifies>(this);
+ m_image_ctx.image_watcher->flush(ctx);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_flush_notifies(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ assert(r == 0);
+ send_close_journal();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_close_journal() {
+ {
+ RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
+ std::swap(m_journal, m_image_ctx.journal);
+ }
+
+ if (m_journal == nullptr) {
+ send_close_object_map();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ using klass = PreReleaseRequest<I>;
+ Context *ctx = create_context_callback<klass, &klass::handle_close_journal>(
+ this);
+ m_journal->close(ctx);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_close_journal(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << "r=" << r << dendl;
+
+ if (r < 0) {
+ // error implies some journal events were not flushed -- continue
+ lderr(cct) << "failed to close journal: " << cpp_strerror(r) << dendl;
+ }
+
+ delete m_journal;
+
+ send_close_object_map();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_close_object_map() {
+ {
+ RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
+ std::swap(m_object_map, m_image_ctx.object_map);
+ }
+
+ if (m_object_map == nullptr) {
+ send_unlock();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ using klass = PreReleaseRequest<I>;
+ Context *ctx = create_context_callback<
+ klass, &klass::handle_close_object_map>(this);
+ m_object_map->close(ctx);
+}
+
+template <typename I>
+void PreReleaseRequest<I>::handle_close_object_map(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << "r=" << r << dendl;
+
+ // object map shouldn't return errors
+ assert(r == 0);
+ delete m_object_map;
+
+ send_unlock();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::send_unlock() {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 10) << dendl;
+
+ finish();
+}
+
+template <typename I>
+void PreReleaseRequest<I>::finish() {
+ m_on_finish->complete(m_error_result);
+ delete this;
+}
+
+} // namespace exclusive_lock
+} // namespace librbd
+
+template class librbd::exclusive_lock::PreReleaseRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff