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-rw-r--r--src/tools/rbd_mirror/image_deleter/TrashMoveRequest.cc419
1 files changed, 419 insertions, 0 deletions
diff --git a/src/tools/rbd_mirror/image_deleter/TrashMoveRequest.cc b/src/tools/rbd_mirror/image_deleter/TrashMoveRequest.cc
new file mode 100644
index 000000000..e53923ef3
--- /dev/null
+++ b/src/tools/rbd_mirror/image_deleter/TrashMoveRequest.cc
@@ -0,0 +1,419 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "tools/rbd_mirror/image_deleter/TrashMoveRequest.h"
+#include "include/rbd_types.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "common/debug.h"
+#include "common/errno.h"
+#include "common/WorkQueue.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ImageState.h"
+#include "librbd/Journal.h"
+#include "librbd/TrashWatcher.h"
+#include "librbd/Utils.h"
+#include "librbd/asio/ContextWQ.h"
+#include "librbd/journal/ResetRequest.h"
+#include "librbd/mirror/ImageRemoveRequest.h"
+#include "librbd/mirror/GetInfoRequest.h"
+#include "librbd/trash/MoveRequest.h"
+#include "tools/rbd_mirror/image_deleter/Types.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd_mirror
+#undef dout_prefix
+#define dout_prefix *_dout << "rbd::mirror::image_deleter::TrashMoveRequest: " \
+ << this << " " << __func__ << ": "
+namespace rbd {
+namespace mirror {
+namespace image_deleter {
+
+using librbd::util::create_context_callback;
+using librbd::util::create_rados_callback;
+
+template <typename I>
+void TrashMoveRequest<I>::send() {
+ get_mirror_image_id();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::get_mirror_image_id() {
+ dout(10) << dendl;
+
+ librados::ObjectReadOperation op;
+ librbd::cls_client::mirror_image_get_image_id_start(&op, m_global_image_id);
+
+ auto aio_comp = create_rados_callback<
+ TrashMoveRequest<I>,
+ &TrashMoveRequest<I>::handle_get_mirror_image_id>(this);
+ m_out_bl.clear();
+ int r = m_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op, &m_out_bl);
+ ceph_assert(r == 0);
+ aio_comp->release();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_get_mirror_image_id(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r == 0) {
+ auto bl_it = m_out_bl.cbegin();
+ r = librbd::cls_client::mirror_image_get_image_id_finish(&bl_it,
+ &m_image_id);
+ }
+ if (r == -ENOENT) {
+ dout(10) << "image " << m_global_image_id << " is not mirrored" << dendl;
+ finish(r);
+ return;
+ } else if (r < 0) {
+ derr << "error retrieving local id for image " << m_global_image_id << ": "
+ << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+
+ get_mirror_info();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::get_mirror_info() {
+ dout(10) << dendl;
+
+ auto ctx = create_context_callback<
+ TrashMoveRequest<I>, &TrashMoveRequest<I>::handle_get_mirror_info>(this);
+ auto req = librbd::mirror::GetInfoRequest<I>::create(
+ m_io_ctx, m_op_work_queue, m_image_id, &m_mirror_image, &m_promotion_state,
+ &m_primary_mirror_uuid, ctx);
+ req->send();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_get_mirror_info(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r == -ENOENT) {
+ dout(5) << "image " << m_global_image_id << " is not mirrored" << dendl;
+ finish(r);
+ return;
+ } else if (r < 0) {
+ derr << "error retrieving image primary info for image "
+ << m_global_image_id << ": " << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+
+ if (m_promotion_state == librbd::mirror::PROMOTION_STATE_PRIMARY) {
+ dout(10) << "image " << m_global_image_id << " is local primary" << dendl;
+ finish(-EPERM);
+ return;
+ } else if (m_promotion_state == librbd::mirror::PROMOTION_STATE_ORPHAN &&
+ !m_resync) {
+ dout(10) << "image " << m_global_image_id << " is orphaned" << dendl;
+ finish(-EPERM);
+ return;
+ }
+
+ disable_mirror_image();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::disable_mirror_image() {
+ dout(10) << dendl;
+
+ m_mirror_image.state = cls::rbd::MIRROR_IMAGE_STATE_DISABLING;
+
+ librados::ObjectWriteOperation op;
+ librbd::cls_client::mirror_image_set(&op, m_image_id, m_mirror_image);
+
+ auto aio_comp = create_rados_callback<
+ TrashMoveRequest<I>,
+ &TrashMoveRequest<I>::handle_disable_mirror_image>(this);
+ int r = m_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op);
+ ceph_assert(r == 0);
+ aio_comp->release();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_disable_mirror_image(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r == -ENOENT) {
+ dout(10) << "local image is not mirrored, aborting deletion." << dendl;
+ finish(r);
+ return;
+ } else if (r == -EEXIST || r == -EINVAL) {
+ derr << "cannot disable mirroring for image " << m_global_image_id
+ << ": global_image_id has changed/reused: "
+ << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ } else if (r < 0) {
+ derr << "cannot disable mirroring for image " << m_global_image_id
+ << ": " << cpp_strerror(r) << dendl;
+ finish(r);
+ return;
+ }
+
+ open_image();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::open_image() {
+ dout(10) << dendl;
+
+ m_image_ctx = I::create("", m_image_id, nullptr, m_io_ctx, false);
+
+ // ensure non-primary images can be modified
+ m_image_ctx->read_only_mask &= ~librbd::IMAGE_READ_ONLY_FLAG_NON_PRIMARY;
+
+ {
+ // don't attempt to open the journal
+ std::unique_lock image_locker{m_image_ctx->image_lock};
+ m_image_ctx->set_journal_policy(new JournalPolicy());
+ }
+
+ Context *ctx = create_context_callback<
+ TrashMoveRequest<I>, &TrashMoveRequest<I>::handle_open_image>(this);
+ m_image_ctx->state->open(librbd::OPEN_FLAG_SKIP_OPEN_PARENT, ctx);
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_open_image(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r == -ENOENT) {
+ dout(5) << "mirror image does not exist, removing orphaned metadata" << dendl;
+ m_image_ctx = nullptr;
+ remove_mirror_image();
+ return;
+ }
+
+ if (r < 0) {
+ derr << "failed to open image: " << cpp_strerror(r) << dendl;
+ m_image_ctx = nullptr;
+ finish(r);
+ return;
+ }
+
+ if (m_image_ctx->old_format) {
+ derr << "cannot move v1 image to trash" << dendl;
+ m_ret_val = -EINVAL;
+ close_image();
+ return;
+ }
+
+ reset_journal();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::reset_journal() {
+ if (m_mirror_image.mode == cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT) {
+ // snapshot-based mirroring doesn't require journal feature
+ acquire_lock();
+ return;
+ }
+
+ dout(10) << dendl;
+
+ // TODO use Journal thread pool for journal ops until converted to ASIO
+ ContextWQ* context_wq;
+ librbd::Journal<>::get_work_queue(
+ reinterpret_cast<CephContext*>(m_io_ctx.cct()), &context_wq);
+
+ // ensure that if the image is recovered any peers will split-brain
+ auto ctx = create_context_callback<
+ TrashMoveRequest<I>, &TrashMoveRequest<I>::handle_reset_journal>(this);
+ auto req = librbd::journal::ResetRequest<I>::create(
+ m_io_ctx, m_image_id, librbd::Journal<>::IMAGE_CLIENT_ID,
+ librbd::Journal<>::LOCAL_MIRROR_UUID, context_wq, ctx);
+ req->send();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_reset_journal(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r < 0 && r != -ENOENT) {
+ derr << "failed to reset journal: " << cpp_strerror(r) << dendl;
+ m_ret_val = r;
+ close_image();
+ return;
+ }
+
+ acquire_lock();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::acquire_lock() {
+ m_image_ctx->owner_lock.lock_shared();
+ if (m_image_ctx->exclusive_lock == nullptr) {
+ m_image_ctx->owner_lock.unlock_shared();
+
+ if (m_mirror_image.mode == cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT) {
+ // snapshot-based mirroring doesn't require exclusive-lock
+ trash_move();
+ } else {
+ derr << "exclusive lock feature not enabled" << dendl;
+ m_ret_val = -EINVAL;
+ close_image();
+ }
+ return;
+ }
+
+ dout(10) << dendl;
+
+ Context *ctx = create_context_callback<
+ TrashMoveRequest<I>, &TrashMoveRequest<I>::handle_acquire_lock>(this);
+ m_image_ctx->exclusive_lock->block_requests(0);
+ m_image_ctx->exclusive_lock->acquire_lock(ctx);
+ m_image_ctx->owner_lock.unlock_shared();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_acquire_lock(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r < 0) {
+ derr << "failed to acquire exclusive lock: " << cpp_strerror(r) << dendl;
+ m_ret_val = r;
+ close_image();
+ return;
+ }
+
+ trash_move();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::trash_move() {
+ dout(10) << dendl;
+
+ utime_t delete_time{ceph_clock_now()};
+ utime_t deferment_end_time{delete_time};
+ deferment_end_time +=
+ m_image_ctx->config.template get_val<uint64_t>("rbd_mirroring_delete_delay");
+
+ m_trash_image_spec = {
+ cls::rbd::TRASH_IMAGE_SOURCE_MIRRORING, m_image_ctx->name, delete_time,
+ deferment_end_time};
+
+ Context *ctx = create_context_callback<
+ TrashMoveRequest<I>, &TrashMoveRequest<I>::handle_trash_move>(this);
+ auto req = librbd::trash::MoveRequest<I>::create(
+ m_io_ctx, m_image_id, m_trash_image_spec, ctx);
+ req->send();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_trash_move(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r < 0) {
+ derr << "failed to move image to trash: " << cpp_strerror(r) << dendl;
+ m_ret_val = r;
+ close_image();
+ return;
+ }
+
+ m_moved_to_trash = true;
+ remove_mirror_image();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::remove_mirror_image() {
+ dout(10) << dendl;
+
+ auto ctx = create_context_callback<
+ TrashMoveRequest<I>,
+ &TrashMoveRequest<I>::handle_remove_mirror_image>(this);
+ auto req = librbd::mirror::ImageRemoveRequest<I>::create(
+ m_io_ctx, m_global_image_id, m_image_id, ctx);
+ req->send();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_remove_mirror_image(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r == -ENOENT) {
+ dout(10) << "local image is not mirrored" << dendl;
+ } else if (r < 0) {
+ derr << "failed to remove mirror image state for " << m_global_image_id
+ << ": " << cpp_strerror(r) << dendl;
+ m_ret_val = r;
+ }
+
+ close_image();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::close_image() {
+ dout(10) << dendl;
+
+ if (m_image_ctx == nullptr) {
+ handle_close_image(0);
+ return;
+ }
+ Context *ctx = create_context_callback<
+ TrashMoveRequest<I>, &TrashMoveRequest<I>::handle_close_image>(this);
+ m_image_ctx->state->close(ctx);
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_close_image(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ m_image_ctx = nullptr;
+
+ if (r < 0) {
+ derr << "failed to close image: " << cpp_strerror(r) << dendl;
+ }
+
+ // don't send notification if we failed
+ if (!m_moved_to_trash) {
+ finish(0);
+ return;
+ }
+
+ notify_trash_add();
+}
+
+template <typename I>
+void TrashMoveRequest<I>::notify_trash_add() {
+ dout(10) << dendl;
+
+ Context *ctx = create_context_callback<
+ TrashMoveRequest<I>, &TrashMoveRequest<I>::handle_notify_trash_add>(this);
+ librbd::TrashWatcher<I>::notify_image_added(m_io_ctx, m_image_id,
+ m_trash_image_spec, ctx);
+}
+
+template <typename I>
+void TrashMoveRequest<I>::handle_notify_trash_add(int r) {
+ dout(10) << "r=" << r << dendl;
+
+ if (r < 0) {
+ derr << "failed to notify trash watchers: " << cpp_strerror(r) << dendl;
+ }
+
+ finish(0);
+}
+
+template <typename I>
+void TrashMoveRequest<I>::finish(int r) {
+ if (m_ret_val < 0) {
+ r = m_ret_val;
+ }
+
+ dout(10) << "r=" << r << dendl;
+
+ m_on_finish->complete(r);
+ delete this;
+}
+
+} // namespace image_deleter
+} // namespace mirror
+} // namespace rbd
+
+template class rbd::mirror::image_deleter::TrashMoveRequest<librbd::ImageCtx>;
+