--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/image/CloseRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ImageState.h"
+#include "librbd/ImageWatcher.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::image::CloseRequest: "
+
+namespace librbd {
+namespace image {
+
+using util::create_async_context_callback;
+using util::create_context_callback;
+
+template <typename I>
+CloseRequest<I>::CloseRequest(I *image_ctx, Context *on_finish)
+ : m_image_ctx(image_ctx), m_on_finish(on_finish), m_error_result(0),
+ m_exclusive_lock(nullptr) {
+ assert(image_ctx != nullptr);
+}
+
+template <typename I>
+void CloseRequest<I>::send() {
+ send_block_image_watcher();
+}
+
+template <typename I>
+void CloseRequest<I>::send_block_image_watcher() {
+ if (m_image_ctx->image_watcher == nullptr) {
+ send_shut_down_update_watchers();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ // prevent incoming requests from our peers
+ m_image_ctx->image_watcher->block_notifies(create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_block_image_watcher>(this));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_block_image_watcher(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ send_shut_down_update_watchers();
+}
+
+template <typename I>
+void CloseRequest<I>::send_shut_down_update_watchers() {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ m_image_ctx->state->shut_down_update_watchers(create_async_context_callback(
+ *m_image_ctx, create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_shut_down_update_watchers>(this)));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_shut_down_update_watchers(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ save_result(r);
+ if (r < 0) {
+ lderr(cct) << "failed to shut down update watchers: " << cpp_strerror(r)
+ << dendl;
+ }
+
+ send_shut_down_io_queue();
+}
+
+template <typename I>
+void CloseRequest<I>::send_shut_down_io_queue() {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ RWLock::RLocker owner_locker(m_image_ctx->owner_lock);
+ m_image_ctx->io_work_queue->shut_down(create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_shut_down_io_queue>(this));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_shut_down_io_queue(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ send_shut_down_exclusive_lock();
+}
+
+template <typename I>
+void CloseRequest<I>::send_shut_down_exclusive_lock() {
+ {
+ RWLock::WLocker owner_locker(m_image_ctx->owner_lock);
+ m_exclusive_lock = m_image_ctx->exclusive_lock;
+
+ // if reading a snapshot -- possible object map is open
+ RWLock::WLocker snap_locker(m_image_ctx->snap_lock);
+ if (m_exclusive_lock == nullptr) {
+ delete m_image_ctx->object_map;
+ m_image_ctx->object_map = nullptr;
+ }
+ }
+
+ if (m_exclusive_lock == nullptr) {
+ send_flush();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ // in-flight IO will be flushed and in-flight requests will be canceled
+ // before releasing lock
+ m_exclusive_lock->shut_down(create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_shut_down_exclusive_lock>(this));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_shut_down_exclusive_lock(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);
+ assert(m_image_ctx->exclusive_lock == nullptr);
+
+ // object map and journal closed during exclusive lock shutdown
+ RWLock::RLocker snap_locker(m_image_ctx->snap_lock);
+ assert(m_image_ctx->journal == nullptr);
+ assert(m_image_ctx->object_map == nullptr);
+ }
+
+ delete m_exclusive_lock;
+ m_exclusive_lock = nullptr;
+
+ save_result(r);
+ if (r < 0) {
+ lderr(cct) << "failed to shut down exclusive lock: " << cpp_strerror(r)
+ << dendl;
+ }
+
+ send_unregister_image_watcher();
+}
+
+template <typename I>
+void CloseRequest<I>::send_flush() {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ RWLock::RLocker owner_locker(m_image_ctx->owner_lock);
+ m_image_ctx->flush(create_async_context_callback(
+ *m_image_ctx, create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_flush>(this)));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_flush(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(cct) << "failed to flush IO: " << cpp_strerror(r) << dendl;
+ }
+ send_unregister_image_watcher();
+}
+
+template <typename I>
+void CloseRequest<I>::send_unregister_image_watcher() {
+ if (m_image_ctx->image_watcher == nullptr) {
+ send_flush_readahead();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ m_image_ctx->image_watcher->unregister_watch(create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_unregister_image_watcher>(this));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_unregister_image_watcher(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ save_result(r);
+ if (r < 0) {
+ lderr(cct) << "failed to unregister image watcher: " << cpp_strerror(r)
+ << dendl;
+ }
+
+ send_flush_readahead();
+}
+
+template <typename I>
+void CloseRequest<I>::send_flush_readahead() {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ m_image_ctx->readahead.wait_for_pending(create_async_context_callback(
+ *m_image_ctx, create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_flush_readahead>(this)));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_flush_readahead(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ send_shut_down_cache();
+}
+
+template <typename I>
+void CloseRequest<I>::send_shut_down_cache() {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ m_image_ctx->shut_down_cache(create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_shut_down_cache>(this));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_shut_down_cache(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ save_result(r);
+ if (r < 0) {
+ lderr(cct) << "failed to shut down cache: " << cpp_strerror(r) << dendl;
+ }
+ send_flush_op_work_queue();
+}
+
+template <typename I>
+void CloseRequest<I>::send_flush_op_work_queue() {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ m_image_ctx->op_work_queue->queue(create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_flush_op_work_queue>(this), 0);
+}
+
+template <typename I>
+void CloseRequest<I>::handle_flush_op_work_queue(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+ send_close_parent();
+}
+
+template <typename I>
+void CloseRequest<I>::send_close_parent() {
+ if (m_image_ctx->parent == nullptr) {
+ send_flush_image_watcher();
+ return;
+ }
+
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << dendl;
+
+ m_image_ctx->parent->state->close(create_async_context_callback(
+ *m_image_ctx, create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_close_parent>(this)));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_close_parent(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ delete m_image_ctx->parent;
+ save_result(r);
+ if (r < 0) {
+ lderr(cct) << "error closing parent image: " << cpp_strerror(r) << dendl;
+ }
+ send_flush_image_watcher();
+}
+
+template <typename I>
+void CloseRequest<I>::send_flush_image_watcher() {
+ if (m_image_ctx->image_watcher == nullptr) {
+ finish();
+ return;
+ }
+
+ m_image_ctx->image_watcher->flush(create_context_callback<
+ CloseRequest<I>, &CloseRequest<I>::handle_flush_image_watcher>(this));
+}
+
+template <typename I>
+void CloseRequest<I>::handle_flush_image_watcher(int r) {
+ CephContext *cct = m_image_ctx->cct;
+ ldout(cct, 10) << this << " " << __func__ << ": r=" << r << dendl;
+
+ if (r < 0) {
+ lderr(cct) << "error flushing image watcher: " << cpp_strerror(r) << dendl;
+ }
+ save_result(r);
+ finish();
+}
+
+template <typename I>
+void CloseRequest<I>::finish() {
+ m_image_ctx->shutdown();
+ m_on_finish->complete(m_error_result);
+ delete this;
+}
+
+} // namespace image
+} // namespace librbd
+
+template class librbd::image::CloseRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff