From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:45:59 +0200 Subject: Adding upstream version 16.2.11+ds. Signed-off-by: Daniel Baumann --- src/librbd/mirror/GetInfoRequest.cc | 290 ++++++++++++++++++++++++++++++++++++ 1 file changed, 290 insertions(+) create mode 100644 src/librbd/mirror/GetInfoRequest.cc (limited to 'src/librbd/mirror/GetInfoRequest.cc') diff --git a/src/librbd/mirror/GetInfoRequest.cc b/src/librbd/mirror/GetInfoRequest.cc new file mode 100644 index 000000000..a7ee64567 --- /dev/null +++ b/src/librbd/mirror/GetInfoRequest.cc @@ -0,0 +1,290 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "librbd/mirror/GetInfoRequest.h" +#include "common/dout.h" +#include "common/errno.h" +#include "cls/rbd/cls_rbd_client.h" +#include "librbd/ImageCtx.h" +#include "librbd/ImageState.h" +#include "librbd/Journal.h" +#include "librbd/Utils.h" + +#define dout_subsys ceph_subsys_rbd +#undef dout_prefix +#define dout_prefix *_dout << "librbd::mirror::GetInfoRequest: " << this \ + << " " << __func__ << ": " + +namespace librbd { +namespace mirror { + +using librbd::util::create_context_callback; +using librbd::util::create_rados_callback; + +template +GetInfoRequest::GetInfoRequest(librados::IoCtx& io_ctx, + asio::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(io_ctx.cct())) { +} + +template +GetInfoRequest::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 +void GetInfoRequest::send() { + get_mirror_image(); +} + +template +void GetInfoRequest::get_mirror_image() { + ldout(m_cct, 20) << dendl; + + librados::ObjectReadOperation op; + cls_client::mirror_image_get_start(&op, m_image_id); + + librados::AioCompletion *comp = create_rados_callback< + GetInfoRequest, &GetInfoRequest::handle_get_mirror_image>(this); + int r = m_io_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl); + ceph_assert(r == 0); + comp->release(); +} + +template +void GetInfoRequest::handle_get_mirror_image(int r) { + ldout(m_cct, 20) << "r=" << r << dendl; + + m_mirror_image->state = cls::rbd::MIRROR_IMAGE_STATE_DISABLED; + *m_promotion_state = PROMOTION_STATE_NON_PRIMARY; + if (r == 0) { + auto iter = m_out_bl.cbegin(); + r = cls_client::mirror_image_get_finish(&iter, m_mirror_image); + } + + if (r == -ENOENT) { + ldout(m_cct, 20) << "mirroring is disabled" << dendl; + finish(r); + return; + } else if (r < 0) { + lderr(m_cct) << "failed to retrieve mirroring state: " << cpp_strerror(r) + << dendl; + finish(r); + return; + } + + 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 +void GetInfoRequest::get_journal_tag_owner() { + ldout(m_cct, 20) << dendl; + + auto ctx = create_context_callback< + GetInfoRequest, &GetInfoRequest::handle_get_journal_tag_owner>(this); + Journal::get_tag_owner(m_io_ctx, m_image_id, &m_mirror_uuid, + m_op_work_queue, ctx); +} + +template +void GetInfoRequest::handle_get_journal_tag_owner(int r) { + ldout(m_cct, 20) << "r=" << r << dendl; + + if (r < 0) { + 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 +void GetInfoRequest::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, &GetInfoRequest::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 +void GetInfoRequest::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 +void GetInfoRequest::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, &GetInfoRequest::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 +void GetInfoRequest::handle_get_snapshots(int r) { + ldout(m_cct, 20) << "r=" << r << dendl; + + std::map 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 +void GetInfoRequest::finish(int r) { + ldout(m_cct, 20) << "r=" << r << dendl; + + m_on_finish->complete(r); + delete this; +} + +template +void GetInfoRequest::calc_promotion_state( + const std::map &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( + &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 + +template class librbd::mirror::GetInfoRequest; -- cgit v1.2.3