--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/operation/ObjectMapIterate.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/AsyncObjectThrottle.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ImageWatcher.h"
+#include "librbd/internal.h"
+#include "librbd/ObjectMap.h"
+#include "librbd/operation/ResizeRequest.h"
+#include "librbd/object_map/InvalidateRequest.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::ObjectMapIterateRequest: "
+
+namespace librbd {
+namespace operation {
+
+namespace {
+
+template <typename I>
+class C_VerifyObjectCallback : public C_AsyncObjectThrottle<I> {
+public:
+ C_VerifyObjectCallback(AsyncObjectThrottle<I> &throttle, I *image_ctx,
+ uint64_t snap_id, uint64_t object_no,
+ ObjectIterateWork<I> handle_mismatch,
+ std::atomic_flag *invalidate)
+ : C_AsyncObjectThrottle<I>(throttle, *image_ctx),
+ m_snap_id(snap_id), m_object_no(object_no),
+ m_oid(image_ctx->get_object_name(m_object_no)),
+ m_handle_mismatch(handle_mismatch),
+ m_invalidate(invalidate)
+ {
+ m_io_ctx.dup(image_ctx->data_ctx);
+ m_io_ctx.snap_set_read(CEPH_SNAPDIR);
+ }
+
+ void complete(int r) override {
+ I &image_ctx = this->m_image_ctx;
+ if (should_complete(r)) {
+ ldout(image_ctx.cct, 20) << m_oid << " C_VerifyObjectCallback completed "
+ << dendl;
+ m_io_ctx.close();
+
+ this->finish(r);
+ delete this;
+ }
+ }
+
+ int send() override {
+ send_list_snaps();
+ return 0;
+ }
+
+private:
+ librados::IoCtx m_io_ctx;
+ uint64_t m_snap_id;
+ uint64_t m_object_no;
+ std::string m_oid;
+ ObjectIterateWork<I> m_handle_mismatch;
+ std::atomic_flag *m_invalidate;
+
+ librados::snap_set_t m_snap_set;
+ int m_snap_list_ret;
+
+ bool should_complete(int r) {
+ I &image_ctx = this->m_image_ctx;
+ CephContext *cct = image_ctx.cct;
+ if (r == 0) {
+ r = m_snap_list_ret;
+ }
+ if (r < 0 && r != -ENOENT) {
+ lderr(cct) << m_oid << " C_VerifyObjectCallback::should_complete: "
+ << "encountered an error: " << cpp_strerror(r) << dendl;
+ return true;
+ }
+
+ ldout(cct, 20) << m_oid << " C_VerifyObjectCallback::should_complete: "
+ << " r="
+ << r << dendl;
+ return object_map_action(get_object_state());
+ }
+
+ void send_list_snaps() {
+ I &image_ctx = this->m_image_ctx;
+ assert(image_ctx.owner_lock.is_locked());
+ ldout(image_ctx.cct, 5) << m_oid
+ << " C_VerifyObjectCallback::send_list_snaps"
+ << dendl;
+
+ librados::ObjectReadOperation op;
+ op.list_snaps(&m_snap_set, &m_snap_list_ret);
+
+ librados::AioCompletion *comp = util::create_rados_callback(this);
+ int r = m_io_ctx.aio_operate(m_oid, comp, &op, NULL);
+ assert(r == 0);
+ comp->release();
+ }
+
+ uint8_t get_object_state() {
+ I &image_ctx = this->m_image_ctx;
+ RWLock::RLocker snap_locker(image_ctx.snap_lock);
+ for (std::vector<librados::clone_info_t>::const_iterator r =
+ m_snap_set.clones.begin(); r != m_snap_set.clones.end(); ++r) {
+ librados::snap_t from_snap_id;
+ librados::snap_t to_snap_id;
+ if (r->cloneid == librados::SNAP_HEAD) {
+ from_snap_id = next_valid_snap_id(m_snap_set.seq + 1);
+ to_snap_id = librados::SNAP_HEAD;
+ } else {
+ from_snap_id = next_valid_snap_id(r->snaps[0]);
+ to_snap_id = r->snaps[r->snaps.size()-1];
+ }
+
+ if (to_snap_id < m_snap_id) {
+ continue;
+ } else if (m_snap_id < from_snap_id) {
+ break;
+ }
+
+ if ((image_ctx.features & RBD_FEATURE_FAST_DIFF) != 0 &&
+ from_snap_id != m_snap_id) {
+ return OBJECT_EXISTS_CLEAN;
+ }
+ return OBJECT_EXISTS;
+ }
+ return OBJECT_NONEXISTENT;
+ }
+
+ uint64_t next_valid_snap_id(uint64_t snap_id) {
+ I &image_ctx = this->m_image_ctx;
+ assert(image_ctx.snap_lock.is_locked());
+
+ std::map<librados::snap_t, SnapInfo>::iterator it =
+ image_ctx.snap_info.lower_bound(snap_id);
+ if (it == image_ctx.snap_info.end()) {
+ return CEPH_NOSNAP;
+ }
+ return it->first;
+ }
+
+ bool object_map_action(uint8_t new_state) {
+ I &image_ctx = this->m_image_ctx;
+ CephContext *cct = image_ctx.cct;
+ RWLock::RLocker owner_locker(image_ctx.owner_lock);
+
+ // should have been canceled prior to releasing lock
+ assert(image_ctx.exclusive_lock == nullptr ||
+ image_ctx.exclusive_lock->is_lock_owner());
+
+ RWLock::RLocker snap_locker(image_ctx.snap_lock);
+ assert(image_ctx.object_map != nullptr);
+
+ RWLock::WLocker l(image_ctx.object_map_lock);
+ uint8_t state = (*image_ctx.object_map)[m_object_no];
+
+ ldout(cct, 10) << "C_VerifyObjectCallback::object_map_action"
+ << " object " << image_ctx.get_object_name(m_object_no)
+ << " state " << (int)state
+ << " new_state " << (int)new_state << dendl;
+
+ if (state != new_state) {
+ int r = 0;
+
+ assert(m_handle_mismatch);
+ r = m_handle_mismatch(image_ctx, m_object_no, state, new_state);
+ if (r) {
+ lderr(cct) << "object map error: object "
+ << image_ctx.get_object_name(m_object_no)
+ << " marked as " << (int)state << ", but should be "
+ << (int)new_state << dendl;
+ m_invalidate->test_and_set();
+ } else {
+ ldout(cct, 1) << "object map inconsistent: object "
+ << image_ctx.get_object_name(m_object_no)
+ << " marked as " << (int)state << ", but should be "
+ << (int)new_state << dendl;
+ }
+ }
+
+ return true;
+ }
+};
+
+} // anonymous namespace
+
+template <typename I>
+void ObjectMapIterateRequest<I>::send() {
+ send_verify_objects();
+}
+
+template <typename I>
+bool ObjectMapIterateRequest<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_VERIFY_OBJECTS:
+ if (m_invalidate.test_and_set()) {
+ send_invalidate_object_map();
+ } else if (r == 0) {
+ return true;
+ }
+ break;
+
+ case STATE_INVALIDATE_OBJECT_MAP:
+ if (r == 0) {
+ return true;
+ }
+ break;
+
+ default:
+ assert(false);
+ break;
+ }
+
+ if (r < 0) {
+ lderr(cct) << "object map operation encountered an error: "
+ << cpp_strerror(r)
+ << dendl;
+ return true;
+ }
+
+ return false;
+}
+
+template <typename I>
+void ObjectMapIterateRequest<I>::send_verify_objects() {
+ assert(m_image_ctx.owner_lock.is_locked());
+ CephContext *cct = m_image_ctx.cct;
+
+ uint64_t snap_id;
+ uint64_t num_objects;
+ {
+ RWLock::RLocker l(m_image_ctx.snap_lock);
+ snap_id = m_image_ctx.snap_id;
+ num_objects = Striper::get_num_objects(m_image_ctx.layout,
+ m_image_ctx.get_image_size(snap_id));
+ }
+ ldout(cct, 5) << this << " send_verify_objects" << dendl;
+
+ m_state = STATE_VERIFY_OBJECTS;
+
+ typename AsyncObjectThrottle<I>::ContextFactory context_factory(
+ boost::lambda::bind(boost::lambda::new_ptr<C_VerifyObjectCallback<I> >(),
+ boost::lambda::_1, &m_image_ctx, snap_id,
+ boost::lambda::_2, m_handle_mismatch, &m_invalidate));
+ AsyncObjectThrottle<I> *throttle = new AsyncObjectThrottle<I>(
+ this, m_image_ctx, context_factory, this->create_callback_context(),
+ &m_prog_ctx, 0, num_objects);
+ throttle->start_ops(m_image_ctx.concurrent_management_ops);
+}
+
+template <typename I>
+uint64_t ObjectMapIterateRequest<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);
+}
+
+template <typename I>
+void ObjectMapIterateRequest<I>::send_invalidate_object_map() {
+ CephContext *cct = m_image_ctx.cct;
+
+ ldout(cct, 5) << this << " send_invalidate_object_map" << dendl;
+ m_state = STATE_INVALIDATE_OBJECT_MAP;
+
+ object_map::InvalidateRequest<I>*req =
+ object_map::InvalidateRequest<I>::create(m_image_ctx, m_image_ctx.snap_id,
+ true,
+ this->create_callback_context());
+
+ assert(m_image_ctx.owner_lock.is_locked());
+ RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
+ req->send();
+}
+
+} // namespace operation
+} // namespace librbd
+
+template class librbd::operation::ObjectMapIterateRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff