diff options
Diffstat (limited to 'src/librbd/operation/EnableFeaturesRequest.cc')
| -rw-r--r-- | src/librbd/operation/EnableFeaturesRequest.cc | 489 |
1 files changed, 489 insertions, 0 deletions
diff --git a/src/librbd/operation/EnableFeaturesRequest.cc b/src/librbd/operation/EnableFeaturesRequest.cc new file mode 100644 index 00000000..e2c1113d --- /dev/null +++ b/src/librbd/operation/EnableFeaturesRequest.cc @@ -0,0 +1,489 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "librbd/operation/EnableFeaturesRequest.h" +#include "common/dout.h" +#include "common/errno.h" +#include "librbd/ExclusiveLock.h" +#include "librbd/ImageCtx.h" +#include "librbd/ImageState.h" +#include "librbd/Journal.h" +#include "librbd/Utils.h" +#include "librbd/image/SetFlagsRequest.h" +#include "librbd/io/ImageRequestWQ.h" +#include "librbd/journal/CreateRequest.h" +#include "librbd/mirror/EnableRequest.h" +#include "librbd/object_map/CreateRequest.h" + +#define dout_subsys ceph_subsys_rbd +#undef dout_prefix +#define dout_prefix *_dout << "librbd::EnableFeaturesRequest: " + +namespace librbd { +namespace operation { + +using util::create_async_context_callback; +using util::create_context_callback; +using util::create_rados_callback; + +template <typename I> +EnableFeaturesRequest<I>::EnableFeaturesRequest(I &image_ctx, + Context *on_finish, + uint64_t journal_op_tid, + uint64_t features) + : Request<I>(image_ctx, on_finish, journal_op_tid), m_features(features) { +} + +template <typename I> +void EnableFeaturesRequest<I>::send_op() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ceph_assert(image_ctx.owner_lock.is_locked()); + + ldout(cct, 20) << this << " " << __func__ << ": features=" << m_features + << dendl; + send_prepare_lock(); +} + +template <typename I> +bool EnableFeaturesRequest<I>::should_complete(int r) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << " r=" << r << dendl; + + if (r < 0) { + lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl; + } + return true; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_prepare_lock() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << dendl; + + image_ctx.state->prepare_lock(create_async_context_callback( + image_ctx, create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_prepare_lock>(this))); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_prepare_lock(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to lock image: " << cpp_strerror(*result) << dendl; + return this->create_context_finisher(*result); + } + + send_block_writes(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_block_writes() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << dendl; + + RWLock::WLocker locker(image_ctx.owner_lock); + image_ctx.io_work_queue->block_writes(create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_block_writes>(this)); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_block_writes(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to block writes: " << cpp_strerror(*result) << dendl; + return handle_finish(*result); + } + m_writes_blocked = true; + + send_get_mirror_mode(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_get_mirror_mode() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + + if ((m_features & RBD_FEATURE_JOURNALING) == 0) { + Context *ctx = create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_get_mirror_mode>(this); + ctx->complete(-ENOENT); + return; + } + + ldout(cct, 20) << this << " " << __func__ << dendl; + + librados::ObjectReadOperation op; + cls_client::mirror_mode_get_start(&op); + + using klass = EnableFeaturesRequest<I>; + librados::AioCompletion *comp = + create_rados_callback<klass, &klass::handle_get_mirror_mode>(this); + m_out_bl.clear(); + int r = image_ctx.md_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl); + ceph_assert(r == 0); + comp->release(); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_get_mirror_mode(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + cls::rbd::MirrorMode mirror_mode = cls::rbd::MIRROR_MODE_DISABLED; + if (*result == 0) { + auto it = m_out_bl.cbegin(); + *result = cls_client::mirror_mode_get_finish(&it, &mirror_mode); + } else if (*result == -ENOENT) { + *result = 0; + } + + if (*result < 0) { + lderr(cct) << "failed to retrieve pool mirror mode: " + << cpp_strerror(*result) << dendl; + return handle_finish(*result); + } + + m_enable_mirroring = (mirror_mode == cls::rbd::MIRROR_MODE_POOL); + + bool create_journal = false; + do { + RWLock::WLocker locker(image_ctx.owner_lock); + + // avoid accepting new requests from peers while we manipulate + // the image features + if (image_ctx.exclusive_lock != nullptr && + (image_ctx.journal == nullptr || + !image_ctx.journal->is_journal_replaying())) { + image_ctx.exclusive_lock->block_requests(0); + m_requests_blocked = true; + } + + m_features &= ~image_ctx.features; + + // interlock object-map and fast-diff together + if (((m_features & RBD_FEATURE_OBJECT_MAP) != 0) || + ((m_features & RBD_FEATURE_FAST_DIFF) != 0)) { + m_features |= (RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF); + } + + m_new_features = image_ctx.features | m_features; + m_features_mask = m_features; + + if ((m_features & RBD_FEATURE_OBJECT_MAP) != 0) { + if ((m_new_features & RBD_FEATURE_EXCLUSIVE_LOCK) == 0) { + lderr(cct) << "cannot enable object-map. exclusive-lock must be " + "enabled before enabling object-map." << dendl; + *result = -EINVAL; + break; + } + m_enable_flags |= RBD_FLAG_OBJECT_MAP_INVALID; + m_features_mask |= (RBD_FEATURE_EXCLUSIVE_LOCK | RBD_FEATURE_FAST_DIFF); + } + if ((m_features & RBD_FEATURE_FAST_DIFF) != 0) { + m_enable_flags |= RBD_FLAG_FAST_DIFF_INVALID; + m_features_mask |= (RBD_FEATURE_EXCLUSIVE_LOCK | RBD_FEATURE_OBJECT_MAP); + } + + if ((m_features & RBD_FEATURE_JOURNALING) != 0) { + if ((m_new_features & RBD_FEATURE_EXCLUSIVE_LOCK) == 0) { + lderr(cct) << "cannot enable journaling. exclusive-lock must be " + "enabled before enabling journaling." << dendl; + *result = -EINVAL; + break; + } + m_features_mask |= RBD_FEATURE_EXCLUSIVE_LOCK; + create_journal = true; + } + } while (false); + + if (*result < 0) { + return handle_finish(*result); + } + if (create_journal) { + send_create_journal(); + return nullptr; + } + send_append_op_event(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_create_journal() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + + ldout(cct, 20) << this << " " << __func__ << dendl; + + journal::TagData tag_data(librbd::Journal<>::LOCAL_MIRROR_UUID); + Context *ctx = create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_create_journal>(this); + + journal::CreateRequest<I> *req = journal::CreateRequest<I>::create( + image_ctx.md_ctx, image_ctx.id, + image_ctx.config.template get_val<uint64_t>("rbd_journal_order"), + image_ctx.config.template get_val<uint64_t>("rbd_journal_splay_width"), + image_ctx.config.template get_val<std::string>("rbd_journal_pool"), + cls::journal::Tag::TAG_CLASS_NEW, tag_data, + librbd::Journal<>::IMAGE_CLIENT_ID, image_ctx.op_work_queue, ctx); + + req->send(); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_create_journal(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to create journal: " << cpp_strerror(*result) + << dendl; + return handle_finish(*result); + } + + send_append_op_event(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_append_op_event() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + + if (!this->template append_op_event< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_append_op_event>(this)) { + send_update_flags(); + } + + ldout(cct, 20) << this << " " << __func__ << dendl; +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_append_op_event(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to commit journal entry: " << cpp_strerror(*result) + << dendl; + return handle_finish(*result); + } + + send_update_flags(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_update_flags() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + + if (m_enable_flags == 0) { + send_set_features(); + return; + } + + ldout(cct, 20) << this << " " << __func__ << ": enable_flags=" + << m_enable_flags << dendl; + + Context *ctx = create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_update_flags>(this); + + image::SetFlagsRequest<I> *req = + image::SetFlagsRequest<I>::create(&image_ctx, m_enable_flags, + m_enable_flags, ctx); + req->send(); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_update_flags(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to update image flags: " << cpp_strerror(*result) + << dendl; + return handle_finish(*result); + } + + send_set_features(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_set_features() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": new_features=" + << m_new_features << ", features_mask=" << m_features_mask + << dendl; + + librados::ObjectWriteOperation op; + librbd::cls_client::set_features(&op, m_new_features, m_features_mask); + + using klass = EnableFeaturesRequest<I>; + librados::AioCompletion *comp = + create_rados_callback<klass, &klass::handle_set_features>(this); + int r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid, comp, &op); + ceph_assert(r == 0); + comp->release(); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_set_features(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to update features: " << cpp_strerror(*result) + << dendl; + return handle_finish(*result); + } + + send_create_object_map(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_create_object_map() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + + if (((image_ctx.features & RBD_FEATURE_OBJECT_MAP) != 0) || + ((m_features & RBD_FEATURE_OBJECT_MAP) == 0)) { + send_enable_mirror_image(); + return; + } + + ldout(cct, 20) << this << " " << __func__ << dendl; + + Context *ctx = create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_create_object_map>(this); + + object_map::CreateRequest<I> *req = + object_map::CreateRequest<I>::create(&image_ctx, ctx); + req->send(); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_create_object_map(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to create object map: " << cpp_strerror(*result) + << dendl; + return handle_finish(*result); + } + + send_enable_mirror_image(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_enable_mirror_image() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << dendl; + + if (!m_enable_mirroring) { + send_notify_update(); + return; + } + + Context *ctx = create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_enable_mirror_image>(this); + + mirror::EnableRequest<I> *req = + mirror::EnableRequest<I>::create(&image_ctx, ctx); + req->send(); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_enable_mirror_image(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + if (*result < 0) { + lderr(cct) << "failed to enable mirroring: " << cpp_strerror(*result) + << dendl; + // not fatal + } + + send_notify_update(); + return nullptr; +} + +template <typename I> +void EnableFeaturesRequest<I>::send_notify_update() { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << dendl; + + Context *ctx = create_context_callback< + EnableFeaturesRequest<I>, + &EnableFeaturesRequest<I>::handle_notify_update>(this); + + image_ctx.notify_update(ctx); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_notify_update(int *result) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << *result << dendl; + + return handle_finish(*result); +} + +template <typename I> +Context *EnableFeaturesRequest<I>::handle_finish(int r) { + I &image_ctx = this->m_image_ctx; + CephContext *cct = image_ctx.cct; + ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; + + { + RWLock::WLocker locker(image_ctx.owner_lock); + + if (image_ctx.exclusive_lock != nullptr && m_requests_blocked) { + image_ctx.exclusive_lock->unblock_requests(); + } + if (m_writes_blocked) { + image_ctx.io_work_queue->unblock_writes(); + } + } + image_ctx.state->handle_prepare_lock_complete(); + + return this->create_context_finisher(r); +} + +} // namespace operation +} // namespace librbd + +template class librbd::operation::EnableFeaturesRequest<librbd::ImageCtx>; 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