diff options
Diffstat (limited to 'src/librbd/api/Mirror.cc')
| -rw-r--r-- | src/librbd/api/Mirror.cc | 1541 |
1 files changed, 1541 insertions, 0 deletions
diff --git a/src/librbd/api/Mirror.cc b/src/librbd/api/Mirror.cc new file mode 100644 index 00000000..4e7b7dc8 --- /dev/null +++ b/src/librbd/api/Mirror.cc @@ -0,0 +1,1541 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "librbd/api/Mirror.h" +#include "include/rados/librados.hpp" +#include "include/stringify.h" +#include "common/ceph_json.h" +#include "common/dout.h" +#include "common/errno.h" +#include "cls/rbd/cls_rbd_client.h" +#include "librbd/ExclusiveLock.h" +#include "librbd/ImageCtx.h" +#include "librbd/ImageState.h" +#include "librbd/Journal.h" +#include "librbd/Utils.h" +#include "librbd/api/Image.h" +#include "librbd/mirror/DemoteRequest.h" +#include "librbd/mirror/DisableRequest.h" +#include "librbd/mirror/EnableRequest.h" +#include "librbd/mirror/GetInfoRequest.h" +#include "librbd/mirror/GetStatusRequest.h" +#include "librbd/mirror/PromoteRequest.h" +#include "librbd/mirror/Types.h" +#include "librbd/MirroringWatcher.h" +#include <boost/algorithm/string/trim.hpp> +#include <boost/algorithm/string/replace.hpp> +#include <boost/scope_exit.hpp> + +#define dout_subsys ceph_subsys_rbd +#undef dout_prefix +#define dout_prefix *_dout << "librbd::api::Mirror: " << __func__ << ": " + +namespace librbd { +namespace api { + +namespace { + +int get_config_key(librados::Rados& rados, const std::string& key, + std::string* value) { + std::string cmd = + "{" + "\"prefix\": \"config-key get\", " + "\"key\": \"" + key + "\"" + "}"; + + bufferlist in_bl; + bufferlist out_bl; + + int r = rados.mon_command(cmd, in_bl, &out_bl, nullptr); + if (r == -EINVAL) { + return -EOPNOTSUPP; + } else if (r < 0 && r != -ENOENT) { + return r; + } + + *value = out_bl.to_str(); + return 0; +} + +int set_config_key(librados::Rados& rados, const std::string& key, + const std::string& value) { + std::string cmd; + if (value.empty()) { + cmd = "{" + "\"prefix\": \"config-key rm\", " + "\"key\": \"" + key + "\"" + "}"; + } else { + cmd = "{" + "\"prefix\": \"config-key set\", " + "\"key\": \"" + key + "\", " + "\"val\": \"" + value + "\"" + "}"; + } + bufferlist in_bl; + bufferlist out_bl; + + int r = rados.mon_command(cmd, in_bl, &out_bl, nullptr); + if (r == -EINVAL) { + return -EOPNOTSUPP; + } else if (r < 0) { + return r; + } + + return 0; +} + +std::string get_peer_config_key_name(int64_t pool_id, + const std::string& peer_uuid) { + return RBD_MIRROR_PEER_CONFIG_KEY_PREFIX + stringify(pool_id) + "/" + + peer_uuid; +} + +int remove_peer_config_key(librados::IoCtx& io_ctx, + const std::string& peer_uuid) { + int64_t pool_id = io_ctx.get_id(); + auto key = get_peer_config_key_name(pool_id, peer_uuid); + + librados::Rados rados(io_ctx); + int r = set_config_key(rados, key, ""); + if (r < 0 && r != -ENOENT && r != -EPERM) { + return r; + } + return 0; +} + +int create_bootstrap_user(CephContext* cct, librados::Rados& rados, + std::string* peer_client_id, std::string* cephx_key) { + ldout(cct, 20) << dendl; + + // retrieve peer CephX user from config-key + int r = get_config_key(rados, RBD_MIRROR_PEER_CLIENT_ID_CONFIG_KEY, + peer_client_id); + if (r == -EACCES) { + ldout(cct, 5) << "insufficient permissions to get peer-client-id " + << "config-key" << dendl; + return r; + } else if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve peer client id key: " + << cpp_strerror(r) << dendl; + return r; + } else if (r == -ENOENT || peer_client_id->empty()) { + ldout(cct, 20) << "creating new peer-client-id config-key" << dendl; + + *peer_client_id = "rbd-mirror-peer"; + r = set_config_key(rados, RBD_MIRROR_PEER_CLIENT_ID_CONFIG_KEY, + *peer_client_id); + if (r == -EACCES) { + ldout(cct, 5) << "insufficient permissions to update peer-client-id " + << "config-key" << dendl; + return r; + } else if (r < 0) { + lderr(cct) << "failed to update peer client id key: " + << cpp_strerror(r) << dendl; + return r; + } + } + ldout(cct, 20) << "peer_client_id=" << *peer_client_id << dendl; + + // create peer client user + std::string cmd = + R"({)" \ + R"( "prefix": "auth get-or-create",)" \ + R"( "entity": "client.)" + *peer_client_id + R"(",)" \ + R"( "caps": [)" \ + R"( "mon", "profile rbd-mirror-peer",)" \ + R"( "osd", "profile rbd"],)" \ + R"( "format": "json")" \ + R"(})"; + + bufferlist in_bl; + bufferlist out_bl; + + r = rados.mon_command(cmd, in_bl, &out_bl, nullptr); + if (r == -EINVAL) { + ldout(cct, 5) << "caps mismatch for existing user" << dendl; + return -EEXIST; + } else if (r == -EACCES) { + ldout(cct, 5) << "insufficient permissions to create user" << dendl; + return r; + } else if (r < 0) { + lderr(cct) << "failed to create or update RBD mirroring bootstrap user: " + << cpp_strerror(r) << dendl; + return r; + } + + // extract key from response + bool json_valid = false; + json_spirit::mValue json_root; + if(json_spirit::read(out_bl.to_str(), json_root)) { + try { + auto& json_obj = json_root.get_array()[0].get_obj(); + *cephx_key = json_obj["key"].get_str(); + json_valid = true; + } catch (std::runtime_error&) { + } + } + + if (!json_valid) { + lderr(cct) << "invalid auth keyring JSON received" << dendl; + return -EBADMSG; + } + + return 0; +} + +int create_bootstrap_peer(CephContext* cct, librados::IoCtx& io_ctx, + const std::string& site_name, const std::string& fsid, + const std::string& client_id, const std::string& key, + const std::string& mon_host, + const std::string& cluster1, + const std::string& cluster2) { + ldout(cct, 20) << dendl; + + std::string peer_uuid; + std::vector<mirror_peer_t> peers; + int r = Mirror<>::peer_list(io_ctx, &peers); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to list mirror peers: " << cpp_strerror(r) << dendl; + return r; + } + + if (peers.empty()) { + r = Mirror<>::peer_add(io_ctx, &peer_uuid, site_name, + "client." + client_id); + if (r < 0) { + lderr(cct) << "failed to add " << cluster1 << " peer to " + << cluster2 << " " << "cluster: " << cpp_strerror(r) << dendl; + return r; + } + } else if (peers[0].cluster_name != site_name && + peers[0].cluster_name != fsid) { + // only support a single peer + lderr(cct) << "multiple peers are not currently supported" << dendl; + return -EINVAL; + } else { + peer_uuid = peers[0].uuid; + + if (peers[0].cluster_name != site_name) { + r = Mirror<>::peer_set_cluster(io_ctx, peer_uuid, site_name); + if (r < 0) { + // non-fatal attempt to update site name + lderr(cct) << "failed to update peer site name" << dendl; + } + } + } + + Mirror<>::Attributes attributes { + {"mon_host", mon_host}, + {"key", key}}; + r = Mirror<>::peer_set_attributes(io_ctx, peer_uuid, attributes); + if (r < 0) { + lderr(cct) << "failed to update " << cluster1 << " cluster connection " + << "attributes in " << cluster2 << " cluster: " + << cpp_strerror(r) << dendl; + return r; + } + + return 0; +} + +template <typename I> +int validate_mirroring_enabled(I *ictx) { + CephContext *cct = ictx->cct; + cls::rbd::MirrorImage mirror_image_internal; + int r = cls_client::mirror_image_get(&ictx->md_ctx, ictx->id, + &mirror_image_internal); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r) + << dendl; + return r; + } else if (mirror_image_internal.state != + cls::rbd::MIRROR_IMAGE_STATE_ENABLED) { + lderr(cct) << "mirroring is not currently enabled" << dendl; + return -EINVAL; + } + return 0; +} + +int list_mirror_images(librados::IoCtx& io_ctx, + std::set<std::string>& mirror_image_ids) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + + std::string last_read = ""; + int max_read = 1024; + int r; + do { + std::map<std::string, std::string> mirror_images; + r = cls_client::mirror_image_list(&io_ctx, last_read, max_read, + &mirror_images); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "error listing mirrored image directory: " + << cpp_strerror(r) << dendl; + return r; + } + for (auto it = mirror_images.begin(); it != mirror_images.end(); ++it) { + mirror_image_ids.insert(it->first); + } + if (!mirror_images.empty()) { + last_read = mirror_images.rbegin()->first; + } + r = mirror_images.size(); + } while (r == max_read); + + return 0; +} + +struct C_ImageGetInfo : public Context { + mirror_image_info_t *mirror_image_info; + Context *on_finish; + + cls::rbd::MirrorImage mirror_image; + mirror::PromotionState promotion_state = mirror::PROMOTION_STATE_PRIMARY; + + C_ImageGetInfo(mirror_image_info_t *mirror_image_info, Context *on_finish) + : mirror_image_info(mirror_image_info), on_finish(on_finish) { + } + + void finish(int r) override { + if (r < 0) { + on_finish->complete(r); + return; + } + + mirror_image_info->global_id = mirror_image.global_image_id; + mirror_image_info->state = static_cast<rbd_mirror_image_state_t>( + mirror_image.state); + mirror_image_info->primary = ( + promotion_state == mirror::PROMOTION_STATE_PRIMARY); + on_finish->complete(0); + } +}; + +struct C_ImageGetStatus : public C_ImageGetInfo { + std::string image_name; + mirror_image_status_t *mirror_image_status; + + cls::rbd::MirrorImageStatus mirror_image_status_internal; + + C_ImageGetStatus(const std::string &image_name, + mirror_image_status_t *mirror_image_status, + Context *on_finish) + : C_ImageGetInfo(&mirror_image_status->info, on_finish), + image_name(image_name), mirror_image_status(mirror_image_status) { + } + + void finish(int r) override { + if (r < 0) { + on_finish->complete(r); + return; + } + + mirror_image_status->name = image_name; + mirror_image_status->state = static_cast<mirror_image_status_state_t>( + mirror_image_status_internal.state); + mirror_image_status->description = mirror_image_status_internal.description; + mirror_image_status->last_update = + mirror_image_status_internal.last_update.sec(); + mirror_image_status->up = mirror_image_status_internal.up; + C_ImageGetInfo::finish(0); + } +}; + +} // anonymous namespace + +template <typename I> +int Mirror<I>::image_enable(I *ictx, bool relax_same_pool_parent_check) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << dendl; + + // TODO + if (!ictx->md_ctx.get_namespace().empty()) { + lderr(cct) << "namespaces are not supported" << dendl; + return -EINVAL; + } + + int r = ictx->state->refresh_if_required(); + if (r < 0) { + return r; + } + + cls::rbd::MirrorMode mirror_mode; + r = cls_client::mirror_mode_get(&ictx->md_ctx, &mirror_mode); + if (r < 0) { + lderr(cct) << "cannot enable mirroring: failed to retrieve mirror mode: " + << cpp_strerror(r) << dendl; + return r; + } + + if (mirror_mode != cls::rbd::MIRROR_MODE_IMAGE) { + lderr(cct) << "cannot enable mirroring in the current pool mirroring mode" + << dendl; + return -EINVAL; + } + + // is mirroring not enabled for the parent? + { + RWLock::RLocker l(ictx->parent_lock); + ImageCtx *parent = ictx->parent; + if (parent) { + if (relax_same_pool_parent_check && + parent->md_ctx.get_id() == ictx->md_ctx.get_id()) { + if (!parent->test_features(RBD_FEATURE_JOURNALING)) { + lderr(cct) << "journaling is not enabled for the parent" << dendl; + return -EINVAL; + } + } else { + cls::rbd::MirrorImage mirror_image_internal; + r = cls_client::mirror_image_get(&(parent->md_ctx), parent->id, + &mirror_image_internal); + if (r == -ENOENT) { + lderr(cct) << "mirroring is not enabled for the parent" << dendl; + return -EINVAL; + } + } + } + } + + if ((ictx->features & RBD_FEATURE_JOURNALING) == 0) { + lderr(cct) << "cannot enable mirroring: journaling is not enabled" << dendl; + return -EINVAL; + } + + C_SaferCond ctx; + auto req = mirror::EnableRequest<ImageCtx>::create(ictx, &ctx); + req->send(); + + r = ctx.wait(); + if (r < 0) { + lderr(cct) << "cannot enable mirroring: " << cpp_strerror(r) << dendl; + return r; + } + + return 0; +} + +template <typename I> +int Mirror<I>::image_disable(I *ictx, bool force) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << dendl; + + int r = ictx->state->refresh_if_required(); + if (r < 0) { + return r; + } + + cls::rbd::MirrorMode mirror_mode; + r = cls_client::mirror_mode_get(&ictx->md_ctx, &mirror_mode); + if (r < 0) { + lderr(cct) << "cannot disable mirroring: failed to retrieve pool " + "mirroring mode: " << cpp_strerror(r) << dendl; + return r; + } + + if (mirror_mode != cls::rbd::MIRROR_MODE_IMAGE) { + lderr(cct) << "cannot disable mirroring in the current pool mirroring " + "mode" << dendl; + return -EINVAL; + } + + // is mirroring enabled for the child? + cls::rbd::MirrorImage mirror_image_internal; + r = cls_client::mirror_image_get(&ictx->md_ctx, ictx->id, + &mirror_image_internal); + if (r == -ENOENT) { + // mirroring is not enabled for this image + ldout(cct, 20) << "ignoring disable command: mirroring is not enabled for " + << "this image" << dendl; + return 0; + } else if (r == -EOPNOTSUPP) { + ldout(cct, 5) << "mirroring not supported by OSD" << dendl; + return r; + } else if (r < 0) { + lderr(cct) << "failed to retrieve mirror image metadata: " + << cpp_strerror(r) << dendl; + return r; + } + + mirror_image_internal.state = cls::rbd::MIRROR_IMAGE_STATE_DISABLING; + r = cls_client::mirror_image_set(&ictx->md_ctx, ictx->id, + mirror_image_internal); + if (r < 0) { + lderr(cct) << "cannot disable mirroring: " << cpp_strerror(r) << dendl; + return r; + } else { + bool rollback = false; + BOOST_SCOPE_EXIT_ALL(ictx, &mirror_image_internal, &rollback) { + if (rollback) { + CephContext *cct = ictx->cct; + mirror_image_internal.state = cls::rbd::MIRROR_IMAGE_STATE_ENABLED; + int r = cls_client::mirror_image_set(&ictx->md_ctx, ictx->id, + mirror_image_internal); + if (r < 0) { + lderr(cct) << "failed to re-enable image mirroring: " + << cpp_strerror(r) << dendl; + } + } + }; + + { + RWLock::RLocker l(ictx->snap_lock); + map<librados::snap_t, SnapInfo> snap_info = ictx->snap_info; + for (auto &info : snap_info) { + cls::rbd::ParentImageSpec parent_spec{ictx->md_ctx.get_id(), + ictx->md_ctx.get_namespace(), + ictx->id, info.first}; + std::vector<librbd::linked_image_spec_t> child_images; + r = Image<I>::list_children(ictx, parent_spec, &child_images); + if (r < 0) { + rollback = true; + return r; + } + + if (child_images.empty()) { + continue; + } + + librados::IoCtx child_io_ctx; + int64_t child_pool_id = -1; + for (auto &child_image : child_images){ + std::string pool = child_image.pool_name; + if (child_pool_id == -1 || + child_pool_id != child_image.pool_id || + child_io_ctx.get_namespace() != child_image.pool_namespace) { + r = util::create_ioctx(ictx->md_ctx, "child image", + child_image.pool_id, + child_image.pool_namespace, + &child_io_ctx); + if (r < 0) { + rollback = true; + return r; + } + + child_pool_id = child_image.pool_id; + } + + cls::rbd::MirrorImage mirror_image_internal; + r = cls_client::mirror_image_get(&child_io_ctx, child_image.image_id, + &mirror_image_internal); + if (r != -ENOENT) { + rollback = true; + lderr(cct) << "mirroring is enabled on one or more children " + << dendl; + return -EBUSY; + } + } + } + } + + C_SaferCond ctx; + auto req = mirror::DisableRequest<ImageCtx>::create(ictx, force, true, + &ctx); + req->send(); + + r = ctx.wait(); + if (r < 0) { + lderr(cct) << "cannot disable mirroring: " << cpp_strerror(r) << dendl; + rollback = true; + return r; + } + } + + return 0; +} + +template <typename I> +int Mirror<I>::image_promote(I *ictx, bool force) { + CephContext *cct = ictx->cct; + + C_SaferCond ctx; + Mirror<I>::image_promote(ictx, force, &ctx); + int r = ctx.wait(); + if (r < 0) { + lderr(cct) << "failed to promote image" << dendl; + return r; + } + + return 0; +} + +template <typename I> +void Mirror<I>::image_promote(I *ictx, bool force, Context *on_finish) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << ", " + << "force=" << force << dendl; + + auto req = mirror::PromoteRequest<>::create(*ictx, force, on_finish); + req->send(); +} + +template <typename I> +int Mirror<I>::image_demote(I *ictx) { + CephContext *cct = ictx->cct; + + C_SaferCond ctx; + Mirror<I>::image_demote(ictx, &ctx); + int r = ctx.wait(); + if (r < 0) { + lderr(cct) << "failed to demote image" << dendl; + return r; + } + + return 0; +} + +template <typename I> +void Mirror<I>::image_demote(I *ictx, Context *on_finish) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << dendl; + + auto req = mirror::DemoteRequest<>::create(*ictx, on_finish); + req->send(); +} + +template <typename I> +int Mirror<I>::image_resync(I *ictx) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << dendl; + + int r = ictx->state->refresh_if_required(); + if (r < 0) { + return r; + } + + C_SaferCond tag_owner_ctx; + bool is_tag_owner; + Journal<I>::is_tag_owner(ictx, &is_tag_owner, &tag_owner_ctx); + r = tag_owner_ctx.wait(); + if (r < 0) { + lderr(cct) << "failed to determine tag ownership: " << cpp_strerror(r) + << dendl; + return r; + } else if (is_tag_owner) { + lderr(cct) << "image is primary, cannot resync to itself" << dendl; + return -EINVAL; + } + + // flag the journal indicating that we want to rebuild the local image + r = Journal<I>::request_resync(ictx); + if (r < 0) { + lderr(cct) << "failed to request resync: " << cpp_strerror(r) << dendl; + return r; + } + + return 0; +} + +template <typename I> +void Mirror<I>::image_get_info(I *ictx, mirror_image_info_t *mirror_image_info, + Context *on_finish) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << dendl; + + auto on_refresh = new FunctionContext( + [ictx, mirror_image_info, on_finish](int r) { + if (r < 0) { + lderr(ictx->cct) << "refresh failed: " << cpp_strerror(r) << dendl; + on_finish->complete(r); + return; + } + + auto ctx = new C_ImageGetInfo(mirror_image_info, on_finish); + auto req = mirror::GetInfoRequest<I>::create(*ictx, &ctx->mirror_image, + &ctx->promotion_state, + ctx); + req->send(); + }); + + if (ictx->state->is_refresh_required()) { + ictx->state->refresh(on_refresh); + } else { + on_refresh->complete(0); + } +} + +template <typename I> +int Mirror<I>::image_get_info(I *ictx, mirror_image_info_t *mirror_image_info) { + C_SaferCond ctx; + image_get_info(ictx, mirror_image_info, &ctx); + + int r = ctx.wait(); + if (r < 0) { + return r; + } + return 0; +} + +template <typename I> +void Mirror<I>::image_get_status(I *ictx, mirror_image_status_t *status, + Context *on_finish) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << dendl; + + auto ctx = new C_ImageGetStatus(ictx->name, status, on_finish); + auto req = mirror::GetStatusRequest<I>::create( + *ictx, &ctx->mirror_image_status_internal, &ctx->mirror_image, + &ctx->promotion_state, ctx); + req->send(); +} + +template <typename I> +int Mirror<I>::image_get_status(I *ictx, mirror_image_status_t *status) { + C_SaferCond ctx; + image_get_status(ictx, status, &ctx); + + int r = ctx.wait(); + if (r < 0) { + return r; + } + return 0; +} + +template <typename I> +int Mirror<I>::image_get_instance_id(I *ictx, std::string *instance_id) { + CephContext *cct = ictx->cct; + ldout(cct, 20) << "ictx=" << ictx << dendl; + + cls::rbd::MirrorImage mirror_image; + int r = cls_client::mirror_image_get(&ictx->md_ctx, ictx->id, &mirror_image); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r) + << dendl; + return r; + } else if (mirror_image.state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) { + lderr(cct) << "mirroring is not currently enabled" << dendl; + return -EINVAL; + } + + entity_inst_t instance; + r = cls_client::mirror_image_instance_get(&ictx->md_ctx, + mirror_image.global_image_id, + &instance); + if (r < 0) { + if (r != -ENOENT && r != -ESTALE) { + lderr(cct) << "failed to get mirror image instance: " << cpp_strerror(r) + << dendl; + } + return r; + } + + *instance_id = stringify(instance.name.num()); + return 0; +} + +template <typename I> +int Mirror<I>::site_name_get(librados::Rados& rados, std::string* name) { + CephContext *cct = reinterpret_cast<CephContext *>(rados.cct()); + ldout(cct, 20) << dendl; + + int r = get_config_key(rados, RBD_MIRROR_SITE_NAME_CONFIG_KEY, name); + if (r == -EOPNOTSUPP) { + return r; + } else if (r == -ENOENT || name->empty()) { + // default to the cluster fsid + r = rados.cluster_fsid(name); + if (r < 0) { + lderr(cct) << "failed to retrieve cluster fsid: " << cpp_strerror(r) + << dendl; + } + return r; + } else if (r < 0) { + lderr(cct) << "failed to retrieve site name: " << cpp_strerror(r) + << dendl; + return r; + } + + return 0; +} + +template <typename I> +int Mirror<I>::site_name_set(librados::Rados& rados, const std::string& name) { + CephContext *cct = reinterpret_cast<CephContext *>(rados.cct()); + + std::string site_name{name}; + boost::algorithm::trim(site_name); + ldout(cct, 20) << "site_name=" << site_name << dendl; + + int r = set_config_key(rados, RBD_MIRROR_SITE_NAME_CONFIG_KEY, name); + if (r == -EOPNOTSUPP) { + return r; + } else if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to update site name: " << cpp_strerror(r) + << dendl; + return r; + } + + return 0; +} + +template <typename I> +int Mirror<I>::mode_get(librados::IoCtx& io_ctx, + rbd_mirror_mode_t *mirror_mode) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << dendl; + + cls::rbd::MirrorMode mirror_mode_internal; + int r = cls_client::mirror_mode_get(&io_ctx, &mirror_mode_internal); + if (r < 0) { + lderr(cct) << "failed to retrieve mirror mode: " << cpp_strerror(r) + << dendl; + return r; + } + + switch (mirror_mode_internal) { + case cls::rbd::MIRROR_MODE_DISABLED: + case cls::rbd::MIRROR_MODE_IMAGE: + case cls::rbd::MIRROR_MODE_POOL: + *mirror_mode = static_cast<rbd_mirror_mode_t>(mirror_mode_internal); + break; + default: + lderr(cct) << "unknown mirror mode (" + << static_cast<uint32_t>(mirror_mode_internal) << ")" + << dendl; + return -EINVAL; + } + return 0; +} + +template <typename I> +int Mirror<I>::mode_set(librados::IoCtx& io_ctx, + rbd_mirror_mode_t mirror_mode) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << dendl; + + // TODO + if (!io_ctx.get_namespace().empty()) { + lderr(cct) << "namespaces are not supported" << dendl; + return -EINVAL; + } + + cls::rbd::MirrorMode next_mirror_mode; + switch (mirror_mode) { + case RBD_MIRROR_MODE_DISABLED: + case RBD_MIRROR_MODE_IMAGE: + case RBD_MIRROR_MODE_POOL: + next_mirror_mode = static_cast<cls::rbd::MirrorMode>(mirror_mode); + break; + default: + lderr(cct) << "unknown mirror mode (" + << static_cast<uint32_t>(mirror_mode) << ")" << dendl; + return -EINVAL; + } + + int r; + if (next_mirror_mode == cls::rbd::MIRROR_MODE_DISABLED) { + // fail early if pool still has peers registered and attempting to disable + std::vector<cls::rbd::MirrorPeer> mirror_peers; + r = cls_client::mirror_peer_list(&io_ctx, &mirror_peers); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to list peers: " << cpp_strerror(r) << dendl; + return r; + } else if (!mirror_peers.empty()) { + lderr(cct) << "mirror peers still registered" << dendl; + return -EBUSY; + } + } + + cls::rbd::MirrorMode current_mirror_mode; + r = cls_client::mirror_mode_get(&io_ctx, ¤t_mirror_mode); + if (r < 0) { + lderr(cct) << "failed to retrieve mirror mode: " << cpp_strerror(r) + << dendl; + return r; + } + + if (current_mirror_mode == next_mirror_mode) { + return 0; + } else if (current_mirror_mode == cls::rbd::MIRROR_MODE_DISABLED) { + uuid_d uuid_gen; + uuid_gen.generate_random(); + r = cls_client::mirror_uuid_set(&io_ctx, uuid_gen.to_string()); + if (r < 0) { + lderr(cct) << "failed to allocate mirroring uuid: " << cpp_strerror(r) + << dendl; + return r; + } + } + + if (current_mirror_mode != cls::rbd::MIRROR_MODE_IMAGE) { + r = cls_client::mirror_mode_set(&io_ctx, cls::rbd::MIRROR_MODE_IMAGE); + if (r < 0) { + lderr(cct) << "failed to set mirror mode to image: " + << cpp_strerror(r) << dendl; + return r; + } + + r = MirroringWatcher<>::notify_mode_updated(io_ctx, + cls::rbd::MIRROR_MODE_IMAGE); + if (r < 0) { + lderr(cct) << "failed to send update notification: " << cpp_strerror(r) + << dendl; + } + } + + if (next_mirror_mode == cls::rbd::MIRROR_MODE_IMAGE) { + return 0; + } + + if (next_mirror_mode == cls::rbd::MIRROR_MODE_POOL) { + map<string, string> images; + r = Image<I>::list_images_v2(io_ctx, &images); + if (r < 0) { + lderr(cct) << "failed listing images: " << cpp_strerror(r) << dendl; + return r; + } + + for (const auto& img_pair : images) { + uint64_t features; + uint64_t incompatible_features; + r = cls_client::get_features(&io_ctx, util::header_name(img_pair.second), + true, &features, &incompatible_features); + if (r < 0) { + lderr(cct) << "error getting features for image " << img_pair.first + << ": " << cpp_strerror(r) << dendl; + return r; + } + + if ((features & RBD_FEATURE_JOURNALING) != 0) { + I *img_ctx = I::create("", img_pair.second, nullptr, io_ctx, false); + r = img_ctx->state->open(0); + if (r < 0) { + lderr(cct) << "error opening image "<< img_pair.first << ": " + << cpp_strerror(r) << dendl; + return r; + } + + r = image_enable(img_ctx, true); + int close_r = img_ctx->state->close(); + if (r < 0) { + lderr(cct) << "error enabling mirroring for image " + << img_pair.first << ": " << cpp_strerror(r) << dendl; + return r; + } else if (close_r < 0) { + lderr(cct) << "failed to close image " << img_pair.first << ": " + << cpp_strerror(close_r) << dendl; + return close_r; + } + } + } + } else if (next_mirror_mode == cls::rbd::MIRROR_MODE_DISABLED) { + while (true) { + bool retry_busy = false; + bool pending_busy = false; + + std::set<std::string> image_ids; + r = list_mirror_images(io_ctx, image_ids); + if (r < 0) { + lderr(cct) << "failed listing images: " << cpp_strerror(r) << dendl; + return r; + } + + for (const auto& img_id : image_ids) { + if (current_mirror_mode == cls::rbd::MIRROR_MODE_IMAGE) { + cls::rbd::MirrorImage mirror_image; + r = cls_client::mirror_image_get(&io_ctx, img_id, &mirror_image); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve mirroring state for image id " + << img_id << ": " << cpp_strerror(r) << dendl; + return r; + } + if (mirror_image.state == cls::rbd::MIRROR_IMAGE_STATE_ENABLED) { + lderr(cct) << "failed to disable mirror mode: there are still " + << "images with mirroring enabled" << dendl; + return -EINVAL; + } + } else { + I *img_ctx = I::create("", img_id, nullptr, io_ctx, false); + r = img_ctx->state->open(0); + if (r < 0) { + lderr(cct) << "error opening image id "<< img_id << ": " + << cpp_strerror(r) << dendl; + return r; + } + + r = image_disable(img_ctx, false); + int close_r = img_ctx->state->close(); + if (r == -EBUSY) { + pending_busy = true; + } else if (r < 0) { + lderr(cct) << "error disabling mirroring for image id " << img_id + << cpp_strerror(r) << dendl; + return r; + } else if (close_r < 0) { + lderr(cct) << "failed to close image id " << img_id << ": " + << cpp_strerror(close_r) << dendl; + return close_r; + } else if (pending_busy) { + // at least one mirrored image was successfully disabled, so we can + // retry any failures caused by busy parent/child relationships + retry_busy = true; + } + } + } + + if (!retry_busy && pending_busy) { + lderr(cct) << "error disabling mirroring for one or more images" + << dendl; + return -EBUSY; + } else if (!retry_busy) { + break; + } + } + } + + r = cls_client::mirror_mode_set(&io_ctx, next_mirror_mode); + if (r < 0) { + lderr(cct) << "failed to set mirror mode: " << cpp_strerror(r) << dendl; + return r; + } + + r = MirroringWatcher<>::notify_mode_updated(io_ctx, next_mirror_mode); + if (r < 0) { + lderr(cct) << "failed to send update notification: " << cpp_strerror(r) + << dendl; + } + return 0; +} + +template <typename I> +int Mirror<I>::peer_bootstrap_create(librados::IoCtx& io_ctx, + std::string* token) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << dendl; + + auto mirror_mode = cls::rbd::MIRROR_MODE_DISABLED; + int r = cls_client::mirror_mode_get(&io_ctx, &mirror_mode); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve mirroring mode: " << cpp_strerror(r) + << dendl; + return r; + } else if (mirror_mode == cls::rbd::MIRROR_MODE_DISABLED) { + return -EINVAL; + } + + // retrieve the cluster fsid + std::string fsid; + librados::Rados rados(io_ctx); + r = rados.cluster_fsid(&fsid); + if (r < 0) { + lderr(cct) << "failed to retrieve cluster fsid: " << cpp_strerror(r) + << dendl; + return r; + } + + std::string peer_client_id; + std::string cephx_key; + r = create_bootstrap_user(cct, rados, &peer_client_id, &cephx_key); + if (r < 0) { + return r; + } + + std::string mon_host = cct->_conf.get_val<std::string>("mon_host"); + ldout(cct, 20) << "mon_host=" << mon_host << dendl; + + // format the token response + bufferlist token_bl; + token_bl.append( + R"({)" \ + R"("fsid":")" + fsid + R"(",)" + \ + R"("client_id":")" + peer_client_id + R"(",)" + \ + R"("key":")" + cephx_key + R"(",)" + \ + R"("mon_host":")" + \ + boost::replace_all_copy(mon_host, "\"", "\\\"") + R"(")" + \ + R"(})"); + ldout(cct, 20) << "token=" << token_bl.to_str() << dendl; + + bufferlist base64_bl; + token_bl.encode_base64(base64_bl); + *token = base64_bl.to_str(); + + return 0; +} + +template <typename I> +int Mirror<I>::peer_bootstrap_import(librados::IoCtx& io_ctx, + rbd_mirror_peer_direction_t direction, + const std::string& token) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << dendl; + + if (direction != RBD_MIRROR_PEER_DIRECTION_RX && + direction != RBD_MIRROR_PEER_DIRECTION_RX_TX) { + lderr(cct) << "invalid mirror peer direction" << dendl; + return -EINVAL; + } + + bufferlist token_bl; + try { + bufferlist base64_bl; + base64_bl.append(token); + token_bl.decode_base64(base64_bl); + } catch (buffer::error& err) { + lderr(cct) << "failed to decode base64" << dendl; + return -EINVAL; + } + + ldout(cct, 20) << "token=" << token_bl.to_str() << dendl; + + bool json_valid = false; + std::string expected_remote_fsid; + std::string remote_client_id; + std::string remote_key; + std::string remote_mon_host; + + json_spirit::mValue json_root; + if(json_spirit::read(token_bl.to_str(), json_root)) { + try { + auto& json_obj = json_root.get_obj(); + expected_remote_fsid = json_obj["fsid"].get_str(); + remote_client_id = json_obj["client_id"].get_str(); + remote_key = json_obj["key"].get_str(); + remote_mon_host = json_obj["mon_host"].get_str(); + json_valid = true; + } catch (std::runtime_error&) { + } + } + + if (!json_valid) { + lderr(cct) << "invalid bootstrap token JSON received" << dendl; + return -EINVAL; + } + + // sanity check import process + std::string local_fsid; + librados::Rados rados(io_ctx); + int r = rados.cluster_fsid(&local_fsid); + if (r < 0) { + lderr(cct) << "failed to retrieve cluster fsid: " << cpp_strerror(r) + << dendl; + return r; + } + + std::string local_site_name; + r = site_name_get(rados, &local_site_name); + if (r < 0) { + lderr(cct) << "failed to retrieve cluster site name: " << cpp_strerror(r) + << dendl; + return r; + } + + // attempt to connect to remote cluster + librados::Rados remote_rados; + remote_rados.init(remote_client_id.c_str()); + + auto remote_cct = reinterpret_cast<CephContext*>(remote_rados.cct()); + remote_cct->_conf.set_val("mon_host", remote_mon_host); + remote_cct->_conf.set_val("key", remote_key); + + r = remote_rados.connect(); + if (r < 0) { + lderr(cct) << "failed to connect to peer cluster: " << cpp_strerror(r) + << dendl; + return r; + } + + std::string remote_fsid; + r = remote_rados.cluster_fsid(&remote_fsid); + if (r < 0) { + lderr(cct) << "failed to retrieve remote cluster fsid: " + << cpp_strerror(r) << dendl; + return r; + } else if (local_fsid == remote_fsid) { + lderr(cct) << "cannot import token for local cluster" << dendl; + return -EINVAL; + } else if (expected_remote_fsid != remote_fsid) { + lderr(cct) << "unexpected remote cluster fsid" << dendl; + return -EINVAL; + } + + std::string remote_site_name; + r = site_name_get(remote_rados, &remote_site_name); + if (r < 0) { + lderr(cct) << "failed to retrieve remote cluster site name: " + << cpp_strerror(r) << dendl; + return r; + } else if (local_site_name == remote_site_name) { + lderr(cct) << "cannot import token for duplicate site name" << dendl; + return -EINVAL; + } + + librados::IoCtx remote_io_ctx; + r = remote_rados.ioctx_create(io_ctx.get_pool_name().c_str(), remote_io_ctx); + if (r == -ENOENT) { + ldout(cct, 10) << "remote pool does not exist" << dendl; + return r; + } else if (r < 0) { + lderr(cct) << "failed to open remote pool '" << io_ctx.get_pool_name() + << "': " << cpp_strerror(r) << dendl; + return r; + } + + auto remote_mirror_mode = cls::rbd::MIRROR_MODE_DISABLED; + r = cls_client::mirror_mode_get(&remote_io_ctx, &remote_mirror_mode); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve remote mirroring mode: " + << cpp_strerror(r) << dendl; + return r; + } else if (remote_mirror_mode == cls::rbd::MIRROR_MODE_DISABLED) { + return -ENOSYS; + } + + auto local_mirror_mode = cls::rbd::MIRROR_MODE_DISABLED; + r = cls_client::mirror_mode_get(&io_ctx, &local_mirror_mode); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to retrieve local mirroring mode: " << cpp_strerror(r) + << dendl; + return r; + } else if (local_mirror_mode == cls::rbd::MIRROR_MODE_DISABLED) { + // copy mirror mode from remote peer + r = mode_set(io_ctx, static_cast<rbd_mirror_mode_t>(remote_mirror_mode)); + if (r < 0) { + return r; + } + } + + if (direction == RBD_MIRROR_PEER_DIRECTION_RX_TX) { + // create a local mirror peer user and export it to the remote cluster + std::string local_client_id; + std::string local_key; + r = create_bootstrap_user(cct, rados, &local_client_id, &local_key); + if (r < 0) { + return r; + } + + std::string local_mon_host = cct->_conf.get_val<std::string>("mon_host"); + + // create local cluster peer in remote cluster + r = create_bootstrap_peer(cct, remote_io_ctx, local_site_name, local_fsid, + local_client_id, local_key, local_mon_host, + "local", "remote"); + if (r < 0) { + return r; + } + } + + // create remote cluster peer in local cluster + r = create_bootstrap_peer(cct, io_ctx, remote_site_name, remote_fsid, + remote_client_id, remote_key, remote_mon_host, + "remote", "local"); + if (r < 0) { + return r; + } + + return 0; +} + +template <typename I> +int Mirror<I>::peer_add(librados::IoCtx& io_ctx, std::string *uuid, + const std::string &cluster_name, + const std::string &client_name) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << "name=" << cluster_name << ", " + << "client=" << client_name << dendl; + + // TODO + if (!io_ctx.get_namespace().empty()) { + lderr(cct) << "namespaces are not supported" << dendl; + return -EINVAL; + } + + if (cct->_conf->cluster == cluster_name) { + lderr(cct) << "cannot add self as remote peer" << dendl; + return -EINVAL; + } + + int r; + do { + uuid_d uuid_gen; + uuid_gen.generate_random(); + + *uuid = uuid_gen.to_string(); + r = cls_client::mirror_peer_add(&io_ctx, *uuid, cluster_name, + client_name); + if (r == -ESTALE) { + ldout(cct, 5) << "duplicate UUID detected, retrying" << dendl; + } else if (r < 0) { + lderr(cct) << "failed to add mirror peer '" << uuid << "': " + << cpp_strerror(r) << dendl; + return r; + } + } while (r == -ESTALE); + return 0; +} + +template <typename I> +int Mirror<I>::peer_remove(librados::IoCtx& io_ctx, const std::string &uuid) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << "uuid=" << uuid << dendl; + + int r = remove_peer_config_key(io_ctx, uuid); + if (r < 0) { + lderr(cct) << "failed to remove peer attributes '" << uuid << "': " + << cpp_strerror(r) << dendl; + return r; + } + + r = cls_client::mirror_peer_remove(&io_ctx, uuid); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to remove peer '" << uuid << "': " + << cpp_strerror(r) << dendl; + return r; + } + return 0; +} + +template <typename I> +int Mirror<I>::peer_list(librados::IoCtx& io_ctx, + std::vector<mirror_peer_t> *peers) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << dendl; + + std::vector<cls::rbd::MirrorPeer> mirror_peers; + int r = cls_client::mirror_peer_list(&io_ctx, &mirror_peers); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to list peers: " << cpp_strerror(r) << dendl; + return r; + } + + peers->clear(); + peers->reserve(mirror_peers.size()); + for (auto &mirror_peer : mirror_peers) { + mirror_peer_t peer; + peer.uuid = mirror_peer.uuid; + peer.cluster_name = mirror_peer.cluster_name; + peer.client_name = mirror_peer.client_name; + peers->push_back(peer); + } + return 0; +} + +template <typename I> +int Mirror<I>::peer_set_client(librados::IoCtx& io_ctx, const std::string &uuid, + const std::string &client_name) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << "uuid=" << uuid << ", " + << "client=" << client_name << dendl; + + int r = cls_client::mirror_peer_set_client(&io_ctx, uuid, client_name); + if (r < 0) { + lderr(cct) << "failed to update client '" << uuid << "': " + << cpp_strerror(r) << dendl; + return r; + } + return 0; +} + +template <typename I> +int Mirror<I>::peer_set_cluster(librados::IoCtx& io_ctx, + const std::string &uuid, + const std::string &cluster_name) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << "uuid=" << uuid << ", " + << "cluster=" << cluster_name << dendl; + + if (cct->_conf->cluster == cluster_name) { + lderr(cct) << "cannot set self as remote peer" << dendl; + return -EINVAL; + } + + int r = cls_client::mirror_peer_set_cluster(&io_ctx, uuid, cluster_name); + if (r < 0) { + lderr(cct) << "failed to update cluster '" << uuid << "': " + << cpp_strerror(r) << dendl; + return r; + } + return 0; +} + +template <typename I> +int Mirror<I>::peer_get_attributes(librados::IoCtx& io_ctx, + const std::string &uuid, + Attributes* attributes) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << "uuid=" << uuid << dendl; + + attributes->clear(); + + librados::Rados rados(io_ctx); + std::string value; + int r = get_config_key(rados, get_peer_config_key_name(io_ctx.get_id(), uuid), + &value); + if (r == -ENOENT || value.empty()) { + return -ENOENT; + } else if (r < 0) { + lderr(cct) << "failed to retrieve peer attributes: " << cpp_strerror(r) + << dendl; + return r; + } + + bool json_valid = false; + json_spirit::mValue json_root; + if(json_spirit::read(value, json_root)) { + try { + auto& json_obj = json_root.get_obj(); + for (auto& pairs : json_obj) { + (*attributes)[pairs.first] = pairs.second.get_str(); + } + json_valid = true; + } catch (std::runtime_error&) { + } + } + + if (!json_valid) { + lderr(cct) << "invalid peer attributes JSON received" << dendl; + return -EINVAL; + } + return 0; +} + +template <typename I> +int Mirror<I>::peer_set_attributes(librados::IoCtx& io_ctx, + const std::string &uuid, + const Attributes& attributes) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + ldout(cct, 20) << "uuid=" << uuid << ", " + << "attributes=" << attributes << dendl; + + std::vector<mirror_peer_t> mirror_peers; + int r = peer_list(io_ctx, &mirror_peers); + if (r < 0) { + return r; + } + + if (std::find_if(mirror_peers.begin(), mirror_peers.end(), + [&uuid](const librbd::mirror_peer_t& peer) { + return uuid == peer.uuid; + }) == mirror_peers.end()) { + ldout(cct, 5) << "mirror peer uuid " << uuid << " does not exist" << dendl; + return -ENOENT; + } + + std::stringstream ss; + ss << "{"; + for (auto& pair : attributes) { + ss << "\\\"" << pair.first << "\\\": " + << "\\\"" << pair.second << "\\\""; + if (&pair != &(*attributes.rbegin())) { + ss << ", "; + } + } + ss << "}"; + + librados::Rados rados(io_ctx); + r = set_config_key(rados, get_peer_config_key_name(io_ctx.get_id(), uuid), + ss.str()); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to update peer attributes: " << cpp_strerror(r) + << dendl; + return r; + } + + return 0; +} + +template <typename I> +int Mirror<I>::image_status_list(librados::IoCtx& io_ctx, + const std::string &start_id, size_t max, + IdToMirrorImageStatus *images) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + int r; + + map<string, string> id_to_name; + { + map<string, string> name_to_id; + r = Image<I>::list_images_v2(io_ctx, &name_to_id); + if (r < 0) { + return r; + } + for (auto it : name_to_id) { + id_to_name[it.second] = it.first; + } + } + + map<std::string, cls::rbd::MirrorImage> images_; + map<std::string, cls::rbd::MirrorImageStatus> statuses_; + + r = librbd::cls_client::mirror_image_status_list(&io_ctx, start_id, max, + &images_, &statuses_); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to list mirror image statuses: " + << cpp_strerror(r) << dendl; + return r; + } + + cls::rbd::MirrorImageStatus unknown_status( + cls::rbd::MIRROR_IMAGE_STATUS_STATE_UNKNOWN, "status not found"); + + for (auto it = images_.begin(); it != images_.end(); ++it) { + auto &image_id = it->first; + auto &info = it->second; + if (info.state == cls::rbd::MIRROR_IMAGE_STATE_DISABLED) { + continue; + } + + auto &image_name = id_to_name[image_id]; + if (image_name.empty()) { + lderr(cct) << "failed to find image name for image " << image_id << ", " + << "using image id as name" << dendl; + image_name = image_id; + } + auto s_it = statuses_.find(image_id); + auto &s = s_it != statuses_.end() ? s_it->second : unknown_status; + (*images)[image_id] = mirror_image_status_t{ + image_name, + mirror_image_info_t{ + info.global_image_id, + static_cast<mirror_image_state_t>(info.state), + false}, // XXX: To set "primary" right would require an additional call. + static_cast<mirror_image_status_state_t>(s.state), + s.description, + s.last_update.sec(), + s.up}; + } + + return 0; +} + +template <typename I> +int Mirror<I>::image_status_summary(librados::IoCtx& io_ctx, + MirrorImageStatusStates *states) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + + std::map<cls::rbd::MirrorImageStatusState, int> states_; + int r = cls_client::mirror_image_status_get_summary(&io_ctx, &states_); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to get mirror status summary: " + << cpp_strerror(r) << dendl; + return r; + } + for (auto &s : states_) { + (*states)[static_cast<mirror_image_status_state_t>(s.first)] = s.second; + } + return 0; +} + +template <typename I> +int Mirror<I>::image_instance_id_list( + librados::IoCtx& io_ctx, const std::string &start_image_id, size_t max, + std::map<std::string, std::string> *instance_ids) { + CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); + std::map<std::string, entity_inst_t> instances; + + int r = librbd::cls_client::mirror_image_instance_list( + &io_ctx, start_image_id, max, &instances); + if (r < 0 && r != -ENOENT) { + lderr(cct) << "failed to list mirror image instances: " << cpp_strerror(r) + << dendl; + return r; + } + + for (auto it : instances) { + (*instance_ids)[it.first] = stringify(it.second.name.num()); + } + + return 0; +} + +} // namespace api +} // namespace librbd + +template class librbd::api::Mirror<librbd::ImageCtx>; |