+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2016 SUSE LINUX GmbH
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation. See file COPYING.
- *
- */
-
-#include <boost/bind.hpp>
-#include <map>
-#include <set>
-#include <sstream>
-
-#include "include/rados/librados.hpp"
-#include "common/Formatter.h"
-#include "common/admin_socket.h"
-#include "common/debug.h"
-#include "common/errno.h"
-#include "common/WorkQueue.h"
-#include "global/global_context.h"
-#include "librbd/internal.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/ImageState.h"
-#include "librbd/Journal.h"
-#include "librbd/Operations.h"
-#include "librbd/journal/Policy.h"
-#include "cls/rbd/cls_rbd_client.h"
-#include "cls/rbd/cls_rbd_types.h"
-#include "librbd/Utils.h"
-#include "ImageDeleter.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_rbd_mirror
-#undef dout_prefix
-#define dout_prefix *_dout << "rbd::mirror::ImageDeleter: " << this << " " \
- << __func__ << ": "
-
-using std::string;
-using std::map;
-using std::stringstream;
-using std::vector;
-using std::pair;
-using std::make_pair;
-
-using librados::IoCtx;
-using namespace librbd;
-
-namespace rbd {
-namespace mirror {
-
-namespace {
-
-class ImageDeleterAdminSocketCommand {
-public:
- virtual ~ImageDeleterAdminSocketCommand() {}
- virtual bool call(Formatter *f, stringstream *ss) = 0;
-};
-
-template <typename I>
-class StatusCommand : public ImageDeleterAdminSocketCommand {
-public:
- explicit StatusCommand(ImageDeleter<I> *image_del) : image_del(image_del) {}
-
- bool call(Formatter *f, stringstream *ss) override {
- image_del->print_status(f, ss);
- return true;
- }
-
-private:
- ImageDeleter<I> *image_del;
-};
-
-struct DeleteJournalPolicy : public librbd::journal::Policy {
- bool append_disabled() const override {
- return true;
- }
- bool journal_disabled() const override {
- return false;
- }
-
- void allocate_tag_on_lock(Context *on_finish) override {
- on_finish->complete(0);
- }
-};
-
-} // anonymous namespace
-
-template <typename I>
-class ImageDeleterAdminSocketHook : public AdminSocketHook {
-public:
- ImageDeleterAdminSocketHook(CephContext *cct, ImageDeleter<I> *image_del) :
- admin_socket(cct->get_admin_socket()) {
-
- std::string command;
- int r;
-
- command = "rbd mirror deletion status";
- r = admin_socket->register_command(command, command, this,
- "get status for image deleter");
- if (r == 0) {
- commands[command] = new StatusCommand<I>(image_del);
- }
-
- }
-
- ~ImageDeleterAdminSocketHook() override {
- for (Commands::const_iterator i = commands.begin(); i != commands.end();
- ++i) {
- (void)admin_socket->unregister_command(i->first);
- delete i->second;
- }
- }
-
- bool call(std::string command, cmdmap_t& cmdmap, std::string format,
- bufferlist& out) override {
- Commands::const_iterator i = commands.find(command);
- assert(i != commands.end());
- Formatter *f = Formatter::create(format);
- stringstream ss;
- bool r = i->second->call(f, &ss);
- delete f;
- out.append(ss);
- return r;
- }
-
-private:
- typedef std::map<std::string, ImageDeleterAdminSocketCommand*> Commands;
- AdminSocket *admin_socket;
- Commands commands;
-};
-
-template <typename I>
-ImageDeleter<I>::ImageDeleter(ContextWQ *work_queue, SafeTimer *timer,
- Mutex *timer_lock,
- ServiceDaemon<librbd::ImageCtx>* service_daemon)
- : m_work_queue(work_queue),
- m_service_daemon(service_daemon),
- m_delete_lock("rbd::mirror::ImageDeleter::Delete"),
- m_image_deleter_thread(this),
- m_failed_timer(timer),
- m_failed_timer_lock(timer_lock),
- m_asok_hook(new ImageDeleterAdminSocketHook<I>(g_ceph_context, this))
-{
- set_failed_timer_interval(g_ceph_context->_conf->get_val<double>(
- "rbd_mirror_delete_retry_interval"));
- m_image_deleter_thread.create("image_deleter");
-}
-
-template <typename I>
-ImageDeleter<I>::~ImageDeleter() {
- dout(20) << "enter" << dendl;
-
- m_running = false;
- {
- Mutex::Locker l (m_delete_lock);
- m_delete_queue_cond.Signal();
- }
- if (m_image_deleter_thread.is_started()) {
- m_image_deleter_thread.join();
- }
-
- delete m_asok_hook;
- dout(20) << "return" << dendl;
-}
-
-template <typename I>
-void ImageDeleter<I>::run() {
- dout(20) << "enter" << dendl;
- while(m_running) {
- m_delete_lock.Lock();
- while (m_delete_queue.empty()) {
- dout(20) << "waiting for delete requests" << dendl;
- m_delete_queue_cond.Wait(m_delete_lock);
-
- if (!m_running) {
- m_delete_lock.Unlock();
- dout(20) << "return" << dendl;
- return;
- }
- }
-
- m_active_delete = std::move(m_delete_queue.back());
- m_delete_queue.pop_back();
- m_delete_lock.Unlock();
-
- bool move_to_next = process_image_delete();
- if (!move_to_next) {
- if (!m_running) {
- dout(20) << "return" << dendl;
- return;
- }
-
- Mutex::Locker l(m_delete_lock);
- if (m_delete_queue.size() == 1) {
- m_delete_queue_cond.Wait(m_delete_lock);
- }
- }
- }
-}
-
-template <typename I>
-void ImageDeleter<I>::schedule_image_delete(RadosRef local_rados,
- int64_t local_pool_id,
- const std::string& global_image_id,
- bool ignore_orphaned) {
- dout(20) << "enter" << dendl;
-
- Mutex::Locker locker(m_delete_lock);
-
- auto del_info = find_delete_info(local_pool_id, global_image_id);
- if (del_info != nullptr) {
- dout(20) << "image " << global_image_id << " "
- << "was already scheduled for deletion" << dendl;
- if (ignore_orphaned) {
- (*del_info)->ignore_orphaned = true;
- }
- return;
- }
-
- m_delete_queue.push_front(
- unique_ptr<DeleteInfo>(new DeleteInfo(local_rados, local_pool_id,
- global_image_id, ignore_orphaned)));
- m_delete_queue_cond.Signal();
-}
-
-template <typename I>
-void ImageDeleter<I>::wait_for_scheduled_deletion(int64_t local_pool_id,
- const std::string &global_image_id,
- Context *ctx,
- bool notify_on_failed_retry) {
-
- ctx = new FunctionContext([this, ctx](int r) {
- m_work_queue->queue(ctx, r);
- });
-
- Mutex::Locker locker(m_delete_lock);
- auto del_info = find_delete_info(local_pool_id, global_image_id);
- if (!del_info) {
- // image not scheduled for deletion
- ctx->complete(0);
- return;
- }
-
- dout(20) << "local_pool_id=" << local_pool_id << ", "
- << "global_image_id=" << global_image_id << dendl;
-
- if ((*del_info)->on_delete != nullptr) {
- (*del_info)->on_delete->complete(-ESTALE);
- }
- (*del_info)->on_delete = ctx;
- (*del_info)->notify_on_failed_retry = notify_on_failed_retry;
-}
-
-template <typename I>
-void ImageDeleter<I>::cancel_waiter(int64_t local_pool_id,
- const std::string &global_image_id) {
- Mutex::Locker locker(m_delete_lock);
- auto del_info = find_delete_info(local_pool_id, global_image_id);
- if (!del_info) {
- return;
- }
-
- if ((*del_info)->on_delete != nullptr) {
- (*del_info)->on_delete->complete(-ECANCELED);
- (*del_info)->on_delete = nullptr;
- }
-}
-
-template <typename I>
-bool ImageDeleter<I>::process_image_delete() {
- stringstream ss;
- m_active_delete->to_string(ss);
- std::string del_info_str = ss.str();
- dout(10) << "start processing delete request: " << del_info_str << dendl;
- int r;
- cls::rbd::MirrorImage mirror_image;
-
- // remote image was disabled, now we need to delete local image
- IoCtx ioctx;
- r = m_active_delete->local_rados->ioctx_create2(
- m_active_delete->local_pool_id, ioctx);
- if (r < 0) {
- derr << "error accessing local pool " << m_active_delete->local_pool_id
- << ": " << cpp_strerror(r) << dendl;
- enqueue_failed_delete(r);
- return true;
- }
-
- dout(20) << "connected to local pool: " << ioctx.get_pool_name() << dendl;
-
- auto &global_image_id = m_active_delete->global_image_id;
- std::string local_image_id;
- r = librbd::cls_client::mirror_image_get_image_id(
- &ioctx, global_image_id, &local_image_id);
- if (r == -ENOENT) {
- dout(10) << "image " << global_image_id << " is not mirrored" << dendl;
- complete_active_delete(r);
- return true;
- } else if (r < 0) {
- derr << "error retrieving local id for image " << global_image_id
- << ": " << cpp_strerror(r) << dendl;
- enqueue_failed_delete(r);
- return true;
- }
-
- std::string mirror_uuid;
- C_SaferCond tag_owner_ctx;
- Journal<>::get_tag_owner(ioctx, local_image_id, &mirror_uuid, m_work_queue,
- &tag_owner_ctx);
- r = tag_owner_ctx.wait();
- if (r < 0 && r != -ENOENT) {
- derr << "error retrieving image primary info for image " << global_image_id
- << ": " << cpp_strerror(r) << dendl;
- enqueue_failed_delete(r);
- return true;
- } else if (r != -ENOENT) {
- if (mirror_uuid == Journal<>::LOCAL_MIRROR_UUID) {
- dout(10) << "image " << global_image_id << " is local primary" << dendl;
- complete_active_delete(-EISPRM);
- return true;
- } else if (mirror_uuid == Journal<>::ORPHAN_MIRROR_UUID &&
- !m_active_delete->ignore_orphaned) {
- dout(10) << "image " << global_image_id << " is orphaned" << dendl;
- complete_active_delete(-EISPRM);
- return true;
- }
- }
-
- dout(20) << "local image is not the primary" << dendl;
- bool has_snapshots;
- r = image_has_snapshots_and_children(&ioctx, local_image_id, &has_snapshots);
- if (r < 0) {
- enqueue_failed_delete(r);
- return true;
- }
-
- mirror_image.global_image_id = global_image_id;
- mirror_image.state = cls::rbd::MIRROR_IMAGE_STATE_DISABLING;
- r = cls_client::mirror_image_set(&ioctx, local_image_id, mirror_image);
- if (r == -ENOENT) {
- dout(10) << "local image is not mirrored, aborting deletion..." << dendl;
- complete_active_delete(r);
- return true;
- } else if (r == -EEXIST || r == -EINVAL) {
- derr << "cannot disable mirroring for image " << global_image_id
- << ": global_image_id has changed/reused: "
- << cpp_strerror(r) << dendl;
- complete_active_delete(r);
- return true;
- } else if (r < 0) {
- derr << "cannot disable mirroring for image " << global_image_id
- << ": " << cpp_strerror(r) << dendl;
- enqueue_failed_delete(r);
- return true;
- }
-
- dout(20) << "set local image mirroring to disable" << dendl;
-
- if (has_snapshots) {
- dout(20) << "local image has snapshots" << dendl;
-
- ImageCtx *imgctx = new ImageCtx("", local_image_id, nullptr, ioctx, false);
- r = imgctx->state->open(false);
- if (r < 0) {
- derr << "error opening image " << global_image_id << " ("
- << local_image_id << "): " << cpp_strerror(r) << dendl;
- enqueue_failed_delete(r);
- return true;
- }
-
- {
- RWLock::WLocker snap_locker(imgctx->snap_lock);
- imgctx->set_journal_policy(new DeleteJournalPolicy());
- }
-
- std::vector<librbd::snap_info_t> snaps;
- r = librbd::snap_list(imgctx, snaps);
- if (r < 0) {
- derr << "error listing snapshot of image " << imgctx->name
- << cpp_strerror(r) << dendl;
- imgctx->state->close();
- enqueue_failed_delete(r);
- return true;
- }
-
- for (const auto& snap : snaps) {
- dout(20) << "processing deletion of snapshot " << imgctx->name << "@"
- << snap.name << dendl;
-
- bool is_protected;
- r = librbd::snap_is_protected(imgctx, snap.name.c_str(), &is_protected);
- if (r < 0) {
- derr << "error checking snapshot protection of snapshot "
- << imgctx->name << "@" << snap.name << ": " << cpp_strerror(r)
- << dendl;
- imgctx->state->close();
- enqueue_failed_delete(r);
- return true;
- }
- if (is_protected) {
- dout(20) << "snapshot " << imgctx->name << "@" << snap.name
- << " is protected, issuing unprotect command" << dendl;
-
- r = imgctx->operations->snap_unprotect(
- cls::rbd::UserSnapshotNamespace(), snap.name.c_str());
- if (r == -EBUSY) {
- // there are still clones of snapshots of this image, therefore send
- // the delete request to the end of the queue
- dout(10) << "local image id " << local_image_id << " has "
- << "snapshots with cloned children, postponing deletion..."
- << dendl;
- imgctx->state->close();
- Mutex::Locker l(m_delete_lock);
- m_active_delete->notify(r);
- m_delete_queue.push_front(std::move(m_active_delete));
- return false;
- } else if (r < 0) {
- derr << "error unprotecting snapshot " << imgctx->name << "@"
- << snap.name << ": " << cpp_strerror(r) << dendl;
- imgctx->state->close();
- enqueue_failed_delete(r);
- return true;
- }
- }
-
- r = imgctx->operations->snap_remove(cls::rbd::UserSnapshotNamespace(),
- snap.name.c_str());
- if (r < 0) {
- derr << "error removing snapshot " << imgctx->name << "@"
- << snap.name << ": " << cpp_strerror(r) << dendl;
- imgctx->state->close();
- enqueue_failed_delete(r);
- return true;
- }
-
- dout(10) << "snapshot " << imgctx->name << "@" << snap.name
- << " was deleted" << dendl;
- }
-
- imgctx->state->close();
- }
-
- librbd::NoOpProgressContext ctx;
- r = librbd::remove(ioctx, "", local_image_id, ctx, true);
- if (r < 0 && r != -ENOENT) {
- derr << "error removing image " << global_image_id << " "
- << "(" << local_image_id << ") from local pool: "
- << cpp_strerror(r) << dendl;
- enqueue_failed_delete(r);
- return true;
- }
-
- // image was already deleted from rbd_directory, now we will make sure
- // that will be also removed from rbd_mirroring
- if (r == -ENOENT) {
- dout(20) << "local image does not exist, removing image from rbd_mirroring"
- << dendl;
- }
-
- r = cls_client::mirror_image_remove(&ioctx, local_image_id);
- if (r < 0 && r != -ENOENT) {
- derr << "error removing image from mirroring directory: "
- << cpp_strerror(r) << dendl;
- enqueue_failed_delete(r);
- return true;
- }
-
- dout(10) << "Successfully deleted image "
- << global_image_id << " " << "(" << local_image_id << ")" << dendl;
-
- complete_active_delete(0);
- return true;
-}
-
-template <typename I>
-int ImageDeleter<I>::image_has_snapshots_and_children(IoCtx *ioctx,
- string& image_id,
- bool *has_snapshots) {
- string header_oid = librbd::util::header_name(image_id);
- ::SnapContext snapc;
- int r = cls_client::get_snapcontext(ioctx, header_oid, &snapc);
- if (r < 0 && r != -ENOENT) {
- derr << "error retrieving snapshot context for image id " << image_id
- << ": " << cpp_strerror(r) << dendl;
- return r;
- }
-
- *has_snapshots = !snapc.snaps.empty();
-
- return 0;
-}
-
-template <typename I>
-void ImageDeleter<I>::complete_active_delete(int r) {
- dout(20) << dendl;
-
- Mutex::Locker delete_locker(m_delete_lock);
- m_active_delete->notify(r);
- m_active_delete.reset();
-}
-
-template <typename I>
-void ImageDeleter<I>::enqueue_failed_delete(int error_code) {
- dout(20) << "enter" << dendl;
-
- if (error_code == -EBLACKLISTED) {
- derr << "blacklisted while deleting local image" << dendl;
- complete_active_delete(error_code);
- return;
- }
-
- m_delete_lock.Lock();
- if (m_active_delete->notify_on_failed_retry) {
- m_active_delete->notify(error_code);
- }
- m_active_delete->error_code = error_code;
- bool was_empty = m_failed_queue.empty();
- m_failed_queue.push_front(std::move(m_active_delete));
- m_delete_lock.Unlock();
- if (was_empty) {
- FunctionContext *ctx = new FunctionContext(
- boost::bind(&ImageDeleter<I>::retry_failed_deletions, this));
- Mutex::Locker l(*m_failed_timer_lock);
- m_failed_timer->add_event_after(m_failed_interval, ctx);
- }
-}
-
-template <typename I>
-void ImageDeleter<I>::retry_failed_deletions() {
- dout(20) << "enter" << dendl;
-
- Mutex::Locker l(m_delete_lock);
-
- bool empty = m_failed_queue.empty();
- while (!m_failed_queue.empty()) {
- m_delete_queue.push_back(std::move(m_failed_queue.back()));
- m_delete_queue.back()->retries++;
- m_failed_queue.pop_back();
- }
- if (!empty) {
- m_delete_queue_cond.Signal();
- }
-}
-
-template <typename I>
-unique_ptr<typename ImageDeleter<I>::DeleteInfo> const*
-ImageDeleter<I>::find_delete_info(int64_t local_pool_id,
- const std::string &global_image_id) {
- assert(m_delete_lock.is_locked());
-
- if (m_active_delete && m_active_delete->match(local_pool_id,
- global_image_id)) {
- return &m_active_delete;
- }
-
- for (const auto& del_info : m_delete_queue) {
- if (del_info->match(local_pool_id, global_image_id)) {
- return &del_info;
- }
- }
-
- for (const auto& del_info : m_failed_queue) {
- if (del_info->match(local_pool_id, global_image_id)) {
- return &del_info;
- }
- }
-
- return nullptr;
-}
-
-template <typename I>
-void ImageDeleter<I>::print_status(Formatter *f, stringstream *ss) {
- dout(20) << "enter" << dendl;
-
- if (f) {
- f->open_object_section("image_deleter_status");
- f->open_array_section("delete_images_queue");
- }
-
- Mutex::Locker l(m_delete_lock);
- for (const auto& image : m_delete_queue) {
- image->print_status(f, ss);
- }
-
- if (f) {
- f->close_section();
- f->open_array_section("failed_deletes_queue");
- }
-
- for (const auto& image : m_failed_queue) {
- image->print_status(f, ss, true);
- }
-
- if (f) {
- f->close_section();
- f->close_section();
- f->flush(*ss);
- }
-}
-
-template <typename I>
-void ImageDeleter<I>::DeleteInfo::notify(int r) {
- if (on_delete) {
- dout(20) << "executing image deletion handler r=" << r << dendl;
-
- Context *ctx = on_delete;
- on_delete = nullptr;
- ctx->complete(r);
- }
-}
-
-template <typename I>
-void ImageDeleter<I>::DeleteInfo::to_string(stringstream& ss) {
- ss << "[" << "local_pool_id=" << local_pool_id << ", ";
- ss << "global_image_id=" << global_image_id << "]";
-}
-
-template <typename I>
-void ImageDeleter<I>::DeleteInfo::print_status(Formatter *f, stringstream *ss,
- bool print_failure_info) {
- if (f) {
- f->open_object_section("delete_info");
- f->dump_int("local_pool_id", local_pool_id);
- f->dump_string("global_image_id", global_image_id);
- if (print_failure_info) {
- f->dump_string("error_code", cpp_strerror(error_code));
- f->dump_int("retries", retries);
- }
- f->close_section();
- f->flush(*ss);
- } else {
- this->to_string(*ss);
- }
-}
-
-template <typename I>
-vector<string> ImageDeleter<I>::get_delete_queue_items() {
- vector<string> items;
-
- Mutex::Locker l(m_delete_lock);
- for (const auto& del_info : m_delete_queue) {
- items.push_back(del_info->global_image_id);
- }
-
- return items;
-}
-
-template <typename I>
-vector<pair<string, int> > ImageDeleter<I>::get_failed_queue_items() {
- vector<pair<string, int> > items;
-
- Mutex::Locker l(m_delete_lock);
- for (const auto& del_info : m_failed_queue) {
- items.push_back(make_pair(del_info->global_image_id,
- del_info->error_code));
- }
-
- return items;
-}
-
-template <typename I>
-void ImageDeleter<I>::set_failed_timer_interval(double interval) {
- this->m_failed_interval = interval;
-}
-
-} // namespace mirror
-} // namespace rbd
-
-template class rbd::mirror::ImageDeleter<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff