using librbd::util::create_context_callback;
using librbd::util::create_rados_callback;
+template <typename I>
+GetInfoRequest<I>::GetInfoRequest(librados::IoCtx& io_ctx,
+ ContextWQ *op_work_queue,
+ const std::string &image_id,
+ cls::rbd::MirrorImage *mirror_image,
+ PromotionState *promotion_state,
+ std::string* primary_mirror_uuid,
+ Context *on_finish)
+ : m_io_ctx(io_ctx), m_op_work_queue(op_work_queue), m_image_id(image_id),
+ m_mirror_image(mirror_image), m_promotion_state(promotion_state),
+ m_primary_mirror_uuid(primary_mirror_uuid), m_on_finish(on_finish),
+ m_cct(reinterpret_cast<CephContext *>(io_ctx.cct())) {
+}
+
+template <typename I>
+GetInfoRequest<I>::GetInfoRequest(I &image_ctx,
+ cls::rbd::MirrorImage *mirror_image,
+ PromotionState *promotion_state,
+ std::string* primary_mirror_uuid,
+ Context *on_finish)
+ : m_image_ctx(&image_ctx), m_io_ctx(image_ctx.md_ctx),
+ m_op_work_queue(image_ctx.op_work_queue), m_image_id(image_ctx.id),
+ m_mirror_image(mirror_image), m_promotion_state(promotion_state),
+ m_primary_mirror_uuid(primary_mirror_uuid), m_on_finish(on_finish),
+ m_cct(image_ctx.cct) {
+}
+
template <typename I>
void GetInfoRequest<I>::send() {
get_mirror_image();
template <typename I>
void GetInfoRequest<I>::get_mirror_image() {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 20) << dendl;
+ ldout(m_cct, 20) << dendl;
librados::ObjectReadOperation op;
- cls_client::mirror_image_get_start(&op, m_image_ctx.id);
+ cls_client::mirror_image_get_start(&op, m_image_id);
librados::AioCompletion *comp = create_rados_callback<
GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_mirror_image>(this);
- int r = m_image_ctx.md_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl);
+ int r = m_io_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl);
ceph_assert(r == 0);
comp->release();
}
template <typename I>
void GetInfoRequest<I>::handle_get_mirror_image(int r) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 20) << "r=" << r << dendl;
+ ldout(m_cct, 20) << "r=" << r << dendl;
m_mirror_image->state = cls::rbd::MIRROR_IMAGE_STATE_DISABLED;
*m_promotion_state = PROMOTION_STATE_NON_PRIMARY;
r = cls_client::mirror_image_get_finish(&iter, m_mirror_image);
}
- if (r == -ENOENT ||
- m_mirror_image->state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) {
- ldout(cct, 20) << "mirroring is disabled" << dendl;
- finish(0);
+ if (r == -ENOENT) {
+ ldout(m_cct, 20) << "mirroring is disabled" << dendl;
+ finish(r);
return;
} else if (r < 0) {
- lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r)
+ lderr(m_cct) << "failed to retrieve mirroring state: " << cpp_strerror(r)
<< dendl;
finish(r);
return;
}
- get_tag_owner();
+ if (m_mirror_image->mode == cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
+ get_journal_tag_owner();
+ } else if (m_mirror_image->mode == cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT) {
+ get_snapcontext();
+ } else {
+ ldout(m_cct, 20) << "unknown mirror image mode: " << m_mirror_image->mode
+ << dendl;
+ finish(-EOPNOTSUPP);
+ }
}
template <typename I>
-void GetInfoRequest<I>::get_tag_owner() {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 20) << dendl;
+void GetInfoRequest<I>::get_journal_tag_owner() {
+ ldout(m_cct, 20) << dendl;
auto ctx = create_context_callback<
- GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_tag_owner>(this);
- Journal<I>::get_tag_owner(m_image_ctx.md_ctx, m_image_ctx.id,
- &m_mirror_uuid, m_image_ctx.op_work_queue, ctx);
+ GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_journal_tag_owner>(this);
+ Journal<I>::get_tag_owner(m_io_ctx, m_image_id, &m_mirror_uuid,
+ m_op_work_queue, ctx);
}
template <typename I>
-void GetInfoRequest<I>::handle_get_tag_owner(int r) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 20) << "r=" << r << dendl;
+void GetInfoRequest<I>::handle_get_journal_tag_owner(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
if (r < 0) {
- lderr(cct) << "failed to determine tag ownership: " << cpp_strerror(r)
- << dendl;
+ lderr(m_cct) << "failed to determine tag ownership: " << cpp_strerror(r)
+ << dendl;
finish(r);
return;
}
if (m_mirror_uuid == Journal<>::LOCAL_MIRROR_UUID) {
*m_promotion_state = PROMOTION_STATE_PRIMARY;
+ *m_primary_mirror_uuid = "";
} else if (m_mirror_uuid == Journal<>::ORPHAN_MIRROR_UUID) {
*m_promotion_state = PROMOTION_STATE_ORPHAN;
+ *m_primary_mirror_uuid = "";
+ } else {
+ *m_primary_mirror_uuid = m_mirror_uuid;
}
finish(0);
}
+template <typename I>
+void GetInfoRequest<I>::get_snapcontext() {
+ if (m_image_ctx != nullptr) {
+ {
+ std::shared_lock image_locker{m_image_ctx->image_lock};
+ calc_promotion_state(m_image_ctx->snap_info);
+ }
+ finish(0);
+ return;
+ }
+
+ ldout(m_cct, 20) << dendl;
+
+ librados::ObjectReadOperation op;
+ cls_client::get_snapcontext_start(&op);
+
+ librados::AioCompletion *comp = create_rados_callback<
+ GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_snapcontext>(this);
+ m_out_bl.clear();
+ int r = m_io_ctx.aio_operate(util::header_name(m_image_id), comp, &op,
+ &m_out_bl);
+ ceph_assert(r == 0);
+ comp->release();
+}
+
+template <typename I>
+void GetInfoRequest<I>::handle_get_snapcontext(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ if (r >= 0) {
+ auto it = m_out_bl.cbegin();
+ r = cls_client::get_snapcontext_finish(&it, &m_snapc);
+ }
+
+ if (r == -ENOENT &&
+ m_mirror_image->state == cls::rbd::MIRROR_IMAGE_STATE_CREATING) {
+ // image doesn't exist but we have a mirror image record for it
+ ldout(m_cct, 10) << "image does not exist for mirror image id "
+ << m_image_id << dendl;
+ *m_promotion_state = PROMOTION_STATE_UNKNOWN;
+ *m_primary_mirror_uuid = "";
+ finish(0);
+ return;
+ } else if (r < 0) {
+ lderr(m_cct) << "failed to get snapcontext: " << cpp_strerror(r)
+ << dendl;
+ finish(r);
+ return;
+ }
+
+ get_snapshots();
+}
+
+
+template <typename I>
+void GetInfoRequest<I>::get_snapshots() {
+ ldout(m_cct, 20) << dendl;
+
+ if (m_snapc.snaps.empty()) {
+ handle_get_snapshots(0);
+ return;
+ }
+
+ librados::ObjectReadOperation op;
+ for (auto snap_id : m_snapc.snaps) {
+ cls_client::snapshot_get_start(&op, snap_id);
+ }
+
+ librados::AioCompletion *comp = create_rados_callback<
+ GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_snapshots>(this);
+ m_out_bl.clear();
+ int r = m_io_ctx.aio_operate(util::header_name(m_image_id), comp, &op,
+ &m_out_bl);
+ ceph_assert(r == 0);
+ comp->release();
+}
+
+template <typename I>
+void GetInfoRequest<I>::handle_get_snapshots(int r) {
+ ldout(m_cct, 20) << "r=" << r << dendl;
+
+ std::map<librados::snap_t, SnapInfo> snap_info;
+
+ auto it = m_out_bl.cbegin();
+ for (auto snap_id : m_snapc.snaps) {
+ cls::rbd::SnapshotInfo snap;
+ if (r >= 0) {
+ r = cls_client::snapshot_get_finish(&it, &snap);
+ }
+ snap_info.emplace(
+ snap_id, SnapInfo(snap.name, snap.snapshot_namespace, 0, {}, 0, 0, {}));
+ }
+
+ if (r == -ENOENT) {
+ // restart
+ get_snapcontext();
+ return;
+ }
+
+ if (r < 0) {
+ lderr(m_cct) << "failed to get snapshots: " << cpp_strerror(r)
+ << dendl;
+ finish(r);
+ return;
+ }
+
+ calc_promotion_state(snap_info);
+ finish(0);
+}
+
template <typename I>
void GetInfoRequest<I>::finish(int r) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 20) << "r=" << r << dendl;
+ ldout(m_cct, 20) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
+template <typename I>
+void GetInfoRequest<I>::calc_promotion_state(
+ const std::map<librados::snap_t, SnapInfo> &snap_info) {
+ *m_promotion_state = PROMOTION_STATE_UNKNOWN;
+ *m_primary_mirror_uuid = "";
+
+ for (auto it = snap_info.rbegin(); it != snap_info.rend(); it++) {
+ auto mirror_ns = boost::get<cls::rbd::MirrorSnapshotNamespace>(
+ &it->second.snap_namespace);
+
+ if (mirror_ns != nullptr) {
+ switch (mirror_ns->state) {
+ case cls::rbd::MIRROR_SNAPSHOT_STATE_PRIMARY:
+ *m_promotion_state = PROMOTION_STATE_PRIMARY;
+ break;
+ case cls::rbd::MIRROR_SNAPSHOT_STATE_NON_PRIMARY:
+ *m_promotion_state = PROMOTION_STATE_NON_PRIMARY;
+ *m_primary_mirror_uuid = mirror_ns->primary_mirror_uuid;
+ break;
+ case cls::rbd::MIRROR_SNAPSHOT_STATE_PRIMARY_DEMOTED:
+ case cls::rbd::MIRROR_SNAPSHOT_STATE_NON_PRIMARY_DEMOTED:
+ *m_promotion_state = PROMOTION_STATE_ORPHAN;
+ break;
+ }
+ break;
+ }
+ }
+
+ ldout(m_cct, 10) << "promotion_state=" << *m_promotion_state << ", "
+ << "primary_mirror_uuid=" << *m_primary_mirror_uuid << dendl;
+}
+
} // namespace mirror
} // namespace librbd
projects / ceph.git / blobdiff