X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Flibrbd%2Foperation%2FEnableFeaturesRequest.cc;fp=src%2Fceph%2Fsrc%2Flibrbd%2Foperation%2FEnableFeaturesRequest.cc;h=c82fb937477744d7c6754e591327db72dfe9800d;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/librbd/operation/EnableFeaturesRequest.cc b/src/ceph/src/librbd/operation/EnableFeaturesRequest.cc
new file mode 100644
index 0000000..c82fb93
--- /dev/null
+++ b/src/ceph/src/librbd/operation/EnableFeaturesRequest.cc
@@ -0,0 +1,485 @@
+// -*- 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;
+  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);
+  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) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *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;
+    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;
+    }
+    if ((m_features & RBD_FEATURE_FAST_DIFF) != 0) {
+      if ((m_new_features & RBD_FEATURE_OBJECT_MAP) == 0) {
+	lderr(cct) << "cannot enable fast-diff. object-map must be "
+                      "enabled before enabling fast-diff." << dendl;
+	*result = -EINVAL;
+	break;
+      }
+      m_enable_flags |= RBD_FLAG_FAST_DIFF_INVALID;
+      m_features_mask |= (RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_EXCLUSIVE_LOCK);
+    }
+    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.journal_order,
+    image_ctx.journal_splay_width, image_ctx.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);
+  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>;