Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 261 insertions, 0 deletions

diff --git a/src/librbd/image/AttachChildRequest.cc b/src/librbd/image/AttachChildRequest.cc
new file mode 100644
index 00000000..f3631bf3
--- /dev/null
+++ b/src/librbd/image/AttachChildRequest.cc
@@ -0,0 +1,261 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/image/AttachChildRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Utils.h"
+#include "librbd/image/RefreshRequest.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::image::AttachChildRequest: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace image {
+
+using util::create_context_callback;
+using util::create_rados_callback;
+
+template <typename I>
+AttachChildRequest<I>::AttachChildRequest(
+    I *image_ctx, I *parent_image_ctx, const librados::snap_t &parent_snap_id,
+    I *old_parent_image_ctx, const librados::snap_t &old_parent_snap_id,
+    uint32_t clone_format, Context* on_finish)
+    : m_image_ctx(image_ctx), m_parent_image_ctx(parent_image_ctx),
+      m_parent_snap_id(parent_snap_id),
+      m_old_parent_image_ctx(old_parent_image_ctx),
+      m_old_parent_snap_id(old_parent_snap_id), m_clone_format(clone_format),
+      m_on_finish(on_finish), m_cct(m_image_ctx->cct) {
+}
+
+template <typename I>
+void AttachChildRequest<I>::send() {
+  if (m_clone_format == 1) {
+    v1_add_child();
+  } else {
+    v2_set_op_feature();
+  }
+}
+
+template <typename I>
+void AttachChildRequest<I>::v1_add_child() {
+  ldout(m_cct, 15) << dendl;
+
+  librados::ObjectWriteOperation op;
+  cls_client::add_child(&op, {m_parent_image_ctx->md_ctx.get_id(), "",
+                              m_parent_image_ctx->id,
+                              m_parent_snap_id}, m_image_ctx->id);
+
+  using klass = AttachChildRequest<I>;
+  librados::AioCompletion *comp =
+    create_rados_callback<klass, &klass::handle_v1_add_child>(this);
+  int r = m_image_ctx->md_ctx.aio_operate(RBD_CHILDREN, comp, &op);
+  ceph_assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+void AttachChildRequest<I>::handle_v1_add_child(int r) {
+  ldout(m_cct, 15) << "r=" << r << dendl;
+
+  if (r < 0) {
+    if (r == -EEXIST && m_old_parent_image_ctx != nullptr) {
+      ldout(m_cct, 5) << "child already exists" << dendl;
+    } else {
+      lderr(m_cct) << "couldn't add child: " << cpp_strerror(r) << dendl;
+      finish(r);
+      return;
+    }
+  }
+
+  v1_refresh();
+}
+
+template <typename I>
+void AttachChildRequest<I>::v1_refresh() {
+  ldout(m_cct, 15) << dendl;
+
+  using klass = AttachChildRequest<I>;
+  RefreshRequest<I> *req = RefreshRequest<I>::create(
+      *m_parent_image_ctx, false, false,
+      create_context_callback<klass, &klass::handle_v1_refresh>(this));
+  req->send();
+}
+
+template <typename I>
+void AttachChildRequest<I>::handle_v1_refresh(int r) {
+  ldout(m_cct, 15) << "r=" << r << dendl;
+
+  bool snap_protected = false;
+  if (r == 0) {
+    RWLock::RLocker snap_locker(m_parent_image_ctx->snap_lock);
+    r = m_parent_image_ctx->is_snap_protected(m_parent_snap_id,
+                                              &snap_protected);
+  }
+
+  if (r < 0 || !snap_protected) {
+    lderr(m_cct) << "validate protected failed" << dendl;
+    finish(-EINVAL);
+    return;
+  }
+
+  v1_remove_child_from_old_parent();
+}
+
+template <typename I>
+void AttachChildRequest<I>::v1_remove_child_from_old_parent() {
+  if (m_old_parent_image_ctx == nullptr) {
+    finish(0);
+    return;
+  }
+
+  ldout(m_cct, 15) << dendl;
+
+  librados::ObjectWriteOperation op;
+  cls_client::remove_child(&op, {m_old_parent_image_ctx->md_ctx.get_id(),
+                                 m_old_parent_image_ctx->md_ctx.get_namespace(),
+                                 m_old_parent_image_ctx->id,
+                                 m_old_parent_snap_id}, m_image_ctx->id);
+
+  using klass = AttachChildRequest<I>;
+  librados::AioCompletion *comp = create_rados_callback<
+      klass, &klass::handle_v1_remove_child_from_old_parent>(this);
+  int r = m_image_ctx->md_ctx.aio_operate(RBD_CHILDREN, comp, &op);
+  ceph_assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+void AttachChildRequest<I>::handle_v1_remove_child_from_old_parent(int r) {
+  ldout(m_cct, 15) << "r=" << r << dendl;
+
+  if (r < 0 && r != -ENOENT) {
+    lderr(m_cct) << "couldn't remove child: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  finish(0);
+}
+
+template <typename I>
+void AttachChildRequest<I>::v2_set_op_feature() {
+  ldout(m_cct, 15) << dendl;
+
+  librados::ObjectWriteOperation op;
+  cls_client::op_features_set(&op, RBD_OPERATION_FEATURE_CLONE_CHILD,
+                              RBD_OPERATION_FEATURE_CLONE_CHILD);
+
+  using klass = AttachChildRequest<I>;
+  auto aio_comp = create_rados_callback<
+      klass, &klass::handle_v2_set_op_feature>(this);
+  int r = m_image_ctx->md_ctx.aio_operate(m_image_ctx->header_oid, aio_comp,
+                                          &op);
+  ceph_assert(r == 0);
+  aio_comp->release();
+}
+
+template <typename I>
+void AttachChildRequest<I>::handle_v2_set_op_feature(int r) {
+  ldout(m_cct, 15) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(m_cct) << "failed to enable clone v2: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  v2_child_attach();
+}
+
+template <typename I>
+void AttachChildRequest<I>::v2_child_attach() {
+  ldout(m_cct, 15) << dendl;
+
+  librados::ObjectWriteOperation op;
+  cls_client::child_attach(&op, m_parent_snap_id,
+                           {m_image_ctx->md_ctx.get_id(),
+                            m_image_ctx->md_ctx.get_namespace(),
+                            m_image_ctx->id});
+
+  using klass = AttachChildRequest<I>;
+  auto aio_comp = create_rados_callback<
+      klass, &klass::handle_v2_child_attach>(this);
+  int r = m_parent_image_ctx->md_ctx.aio_operate(m_parent_image_ctx->header_oid,
+                                                 aio_comp, &op);
+  ceph_assert(r == 0);
+  aio_comp->release();
+}
+
+template <typename I>
+void AttachChildRequest<I>::handle_v2_child_attach(int r) {
+  ldout(m_cct, 15) << "r=" << r << dendl;
+
+  if (r < 0) {
+    if (r == -EEXIST && m_old_parent_image_ctx != nullptr) {
+      ldout(m_cct, 5) << "child already exists" << dendl;
+    } else {
+      lderr(m_cct) << "failed to attach child image: " << cpp_strerror(r)
+                   << dendl;
+      finish(r);
+      return;
+    }
+  }
+
+  v2_child_detach_from_old_parent();
+}
+
+template <typename I>
+void AttachChildRequest<I>::v2_child_detach_from_old_parent() {
+  if (m_old_parent_image_ctx == nullptr) {
+    finish(0);
+    return;
+  }
+
+  ldout(m_cct, 15) << dendl;
+
+  librados::ObjectWriteOperation op;
+  cls_client::child_detach(&op, m_old_parent_snap_id,
+                           {m_image_ctx->md_ctx.get_id(),
+                            m_image_ctx->md_ctx.get_namespace(),
+                            m_image_ctx->id});
+
+  using klass = AttachChildRequest<I>;
+  auto aio_comp = create_rados_callback<
+      klass, &klass::handle_v2_child_detach_from_old_parent>(this);
+  int r = m_old_parent_image_ctx->md_ctx.aio_operate(
+      m_old_parent_image_ctx->header_oid, aio_comp, &op);
+  ceph_assert(r == 0);
+  aio_comp->release();
+}
+
+template <typename I>
+void AttachChildRequest<I>::handle_v2_child_detach_from_old_parent(int r) {
+  ldout(m_cct, 15) << "r=" << r << dendl;
+
+  if (r < 0 && r != -ENOENT) {
+    lderr(m_cct) << "failed to detach child image: " << cpp_strerror(r)
+                 << dendl;
+    finish(r);
+    return;
+  }
+
+  finish(0);
+}
+
+template <typename I>
+void AttachChildRequest<I>::finish(int r) {
+  ldout(m_cct, 5) << "r=" << r << dendl;
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace image
+} // namespace librbd
+
+template class librbd::image::AttachChildRequest<librbd::ImageCtx>;