X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Flibrbd%2Fmirror%2FGetStatusRequest.cc;fp=src%2Fceph%2Fsrc%2Flibrbd%2Fmirror%2FGetStatusRequest.cc;h=b21a16a1f8d1bc7a9ef75e92cbe8ed2e8aae62e9;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git diff --git a/src/ceph/src/librbd/mirror/GetStatusRequest.cc b/src/ceph/src/librbd/mirror/GetStatusRequest.cc new file mode 100644 index 0000000..b21a16a --- /dev/null +++ b/src/ceph/src/librbd/mirror/GetStatusRequest.cc @@ -0,0 +1,112 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "librbd/mirror/GetStatusRequest.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" +#include "librbd/mirror/GetInfoRequest.h" + +#define dout_subsys ceph_subsys_rbd +#undef dout_prefix +#define dout_prefix *_dout << "librbd::mirror::GetStatusRequest: " << this \ + << " " << __func__ << ": " + +namespace librbd { +namespace mirror { + +using librbd::util::create_context_callback; +using librbd::util::create_rados_callback; + +template +void GetStatusRequest::send() { + *m_mirror_image_status = cls::rbd::MirrorImageStatus( + cls::rbd::MIRROR_IMAGE_STATUS_STATE_UNKNOWN, "status not found"); + + get_info(); +} + +template +void GetStatusRequest::get_info() { + CephContext *cct = m_image_ctx.cct; + ldout(cct, 20) << dendl; + + auto ctx = create_context_callback< + GetStatusRequest, &GetStatusRequest::handle_get_info>(this); + auto req = GetInfoRequest::create(m_image_ctx, m_mirror_image, + m_promotion_state, ctx); + req->send(); +} + +template +void GetStatusRequest::handle_get_info(int r) { + CephContext *cct = m_image_ctx.cct; + ldout(cct, 20) << "r=" << r << dendl; + + if (r < 0) { + lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r) + << dendl; + finish(r); + return; + } else if (m_mirror_image->state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) { + finish(0); + return; + } + + get_status(); +} + +template +void GetStatusRequest::get_status() { + CephContext *cct = m_image_ctx.cct; + ldout(cct, 20) << dendl; + + librados::ObjectReadOperation op; + cls_client::mirror_image_status_get_start( + &op, m_mirror_image->global_image_id); + + librados::AioCompletion *comp = create_rados_callback< + GetStatusRequest, &GetStatusRequest::handle_get_status>(this); + int r = m_image_ctx.md_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl); + assert(r == 0); + comp->release(); +} + +template +void GetStatusRequest::handle_get_status(int r) { + CephContext *cct = m_image_ctx.cct; + ldout(cct, 20) << "r=" << r << dendl; + + if (r == 0) { + bufferlist::iterator iter = m_out_bl.begin(); + r = cls_client::mirror_image_status_get_finish(&iter, + m_mirror_image_status); + } + + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve mirror image status: " << cpp_strerror(r) + << dendl; + finish(r); + return; + } + + finish(0); +} + +template +void GetStatusRequest::finish(int r) { + CephContext *cct = m_image_ctx.cct; + ldout(cct, 20) << "r=" << r << dendl; + + m_on_finish->complete(r); + delete this; +} + +} // namespace mirror +} // namespace librbd + +template class librbd::mirror::GetStatusRequest;