--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/operation/RebuildObjectMapRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/AsyncObjectThrottle.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/internal.h"
+#include "librbd/ObjectMap.h"
+#include "librbd/operation/ResizeRequest.h"
+#include "librbd/operation/TrimRequest.h"
+#include "librbd/operation/ObjectMapIterate.h"
+#include "librbd/Utils.h"
+#include <boost/lambda/bind.hpp>
+#include <boost/lambda/construct.hpp>
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::RebuildObjectMapRequest: "
+
+namespace librbd {
+namespace operation {
+
+template <typename I>
+void RebuildObjectMapRequest<I>::send() {
+ send_resize_object_map();
+}
+
+template <typename I>
+bool RebuildObjectMapRequest<I>::should_complete(int r) {
+ CephContext *cct = m_image_ctx.cct;
+ ldout(cct, 5) << this << " should_complete: " << " r=" << r << dendl;
+
+ RWLock::RLocker owner_lock(m_image_ctx.owner_lock);
+ switch (m_state) {
+ case STATE_RESIZE_OBJECT_MAP:
+ ldout(cct, 5) << "RESIZE_OBJECT_MAP" << dendl;
+ if (r == -ESTALE && !m_attempted_trim) {
+ // objects are still flagged as in-use -- delete them
+ m_attempted_trim = true;
+ send_trim_image();
+ return false;
+ } else if (r == 0) {
+ send_verify_objects();
+ }
+ break;
+
+ case STATE_TRIM_IMAGE:
+ ldout(cct, 5) << "TRIM_IMAGE" << dendl;
+ if (r == 0) {
+ send_resize_object_map();
+ }
+ break;
+
+ case STATE_VERIFY_OBJECTS:
+ ldout(cct, 5) << "VERIFY_OBJECTS" << dendl;
+ if (r == 0) {
+ send_save_object_map();
+ }
+ break;
+
+ case STATE_SAVE_OBJECT_MAP:
+ ldout(cct, 5) << "SAVE_OBJECT_MAP" << dendl;
+ if (r == 0) {
+ send_update_header();
+ }
+ break;
+ case STATE_UPDATE_HEADER:
+ ldout(cct, 5) << "UPDATE_HEADER" << dendl;
+ if (r == 0) {
+ return true;
+ }
+ break;
+
+ default:
+ assert(false);
+ break;
+ }
+
+ if (r == -ERESTART) {
+ ldout(cct, 5) << "rebuild object map operation interrupted" << dendl;
+ return true;
+ } else if (r < 0) {
+ lderr(cct) << "rebuild object map encountered an error: " << cpp_strerror(r)
+ << dendl;
+ return true;
+ }
+ return false;
+}
+
+template <typename I>
+void RebuildObjectMapRequest<I>::send_resize_object_map() {
+ assert(m_image_ctx.owner_lock.is_locked());
+ CephContext *cct = m_image_ctx.cct;
+
+ m_image_ctx.snap_lock.get_read();
+ assert(m_image_ctx.object_map != nullptr);
+
+ uint64_t size = get_image_size();
+ uint64_t num_objects = Striper::get_num_objects(m_image_ctx.layout, size);
+
+ if (m_image_ctx.object_map->size() == num_objects) {
+ m_image_ctx.snap_lock.put_read();
+ send_verify_objects();
+ return;
+ }
+
+ ldout(cct, 5) << this << " send_resize_object_map" << dendl;
+ m_state = STATE_RESIZE_OBJECT_MAP;
+
+ // should have been canceled prior to releasing lock
+ assert(m_image_ctx.exclusive_lock == nullptr ||
+ m_image_ctx.exclusive_lock->is_lock_owner());
+
+ m_image_ctx.object_map->aio_resize(size, OBJECT_NONEXISTENT,
+ this->create_callback_context());
+ m_image_ctx.snap_lock.put_read();
+}
+
+template <typename I>
+void RebuildObjectMapRequest<I>::send_trim_image() {
+ CephContext *cct = m_image_ctx.cct;
+
+ RWLock::RLocker l(m_image_ctx.owner_lock);
+
+ // should have been canceled prior to releasing lock
+ assert(m_image_ctx.exclusive_lock == nullptr ||
+ m_image_ctx.exclusive_lock->is_lock_owner());
+ ldout(cct, 5) << this << " send_trim_image" << dendl;
+ m_state = STATE_TRIM_IMAGE;
+
+ uint64_t new_size;
+ uint64_t orig_size;
+ {
+ RWLock::RLocker l(m_image_ctx.snap_lock);
+ assert(m_image_ctx.object_map != nullptr);
+
+ new_size = get_image_size();
+ orig_size = m_image_ctx.get_object_size() *
+ m_image_ctx.object_map->size();
+ }
+ TrimRequest<I> *req = TrimRequest<I>::create(m_image_ctx,
+ this->create_callback_context(),
+ orig_size, new_size, m_prog_ctx);
+ req->send();
+}
+
+template <typename I>
+bool update_object_map(I& image_ctx, uint64_t object_no, uint8_t current_state,
+ uint8_t new_state) {
+ CephContext *cct = image_ctx.cct;
+ uint64_t snap_id = image_ctx.snap_id;
+
+ uint8_t state = (*image_ctx.object_map)[object_no];
+ if (state == OBJECT_EXISTS && new_state == OBJECT_NONEXISTENT &&
+ snap_id == CEPH_NOSNAP) {
+ // might be writing object to OSD concurrently
+ new_state = state;
+ }
+
+ if (new_state != state) {
+ ldout(cct, 15) << image_ctx.get_object_name(object_no)
+ << " rebuild updating object map "
+ << static_cast<uint32_t>(state) << "->"
+ << static_cast<uint32_t>(new_state) << dendl;
+ (*image_ctx.object_map)[object_no] = new_state;
+ }
+ return false;
+}
+
+template <typename I>
+void RebuildObjectMapRequest<I>::send_verify_objects() {
+ assert(m_image_ctx.owner_lock.is_locked());
+ CephContext *cct = m_image_ctx.cct;
+
+ m_state = STATE_VERIFY_OBJECTS;
+ ldout(cct, 5) << this << " send_verify_objects" << dendl;
+
+ ObjectMapIterateRequest<I> *req =
+ new ObjectMapIterateRequest<I>(m_image_ctx,
+ this->create_callback_context(),
+ m_prog_ctx, update_object_map);
+
+ req->send();
+}
+
+template <typename I>
+void RebuildObjectMapRequest<I>::send_save_object_map() {
+ assert(m_image_ctx.owner_lock.is_locked());
+ CephContext *cct = m_image_ctx.cct;
+
+ ldout(cct, 5) << this << " send_save_object_map" << dendl;
+ m_state = STATE_SAVE_OBJECT_MAP;
+
+ // should have been canceled prior to releasing lock
+ assert(m_image_ctx.exclusive_lock == nullptr ||
+ m_image_ctx.exclusive_lock->is_lock_owner());
+
+ RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
+ assert(m_image_ctx.object_map != nullptr);
+ m_image_ctx.object_map->aio_save(this->create_callback_context());
+}
+
+template <typename I>
+void RebuildObjectMapRequest<I>::send_update_header() {
+ assert(m_image_ctx.owner_lock.is_locked());
+
+ // should have been canceled prior to releasing lock
+ assert(m_image_ctx.exclusive_lock == nullptr ||
+ m_image_ctx.exclusive_lock->is_lock_owner());
+
+ ldout(m_image_ctx.cct, 5) << this << " send_update_header" << dendl;
+ m_state = STATE_UPDATE_HEADER;
+
+ librados::ObjectWriteOperation op;
+
+ uint64_t flags = RBD_FLAG_OBJECT_MAP_INVALID | RBD_FLAG_FAST_DIFF_INVALID;
+ cls_client::set_flags(&op, m_image_ctx.snap_id, 0, flags);
+
+ librados::AioCompletion *comp = this->create_callback_completion();
+ int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op);
+ assert(r == 0);
+ comp->release();
+
+ RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
+ m_image_ctx.update_flags(m_image_ctx.snap_id, flags, false);
+}
+
+template <typename I>
+uint64_t RebuildObjectMapRequest<I>::get_image_size() const {
+ assert(m_image_ctx.snap_lock.is_locked());
+ if (m_image_ctx.snap_id == CEPH_NOSNAP) {
+ if (!m_image_ctx.resize_reqs.empty()) {
+ return m_image_ctx.resize_reqs.front()->get_image_size();
+ } else {
+ return m_image_ctx.size;
+ }
+ }
+ return m_image_ctx.get_image_size(m_image_ctx.snap_id);
+}
+
+} // namespace operation
+} // namespace librbd
+
+template class librbd::operation::RebuildObjectMapRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff