[ceph.git] / ceph / src / tools / rbd_mirror / image_replayer / CreateImageRequest.cc

// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab

#include "CreateImageRequest.h"
#include "CloseImageRequest.h"
#include "OpenImageRequest.h"
#include "common/errno.h"
#include "common/WorkQueue.h"
#include "cls/rbd/cls_rbd_client.h"
#include "librbd/ImageCtx.h"
#include "librbd/ImageState.h"
#include "librbd/internal.h"
#include "librbd/Utils.h"
#include "librbd/image/CreateRequest.h"
#include "librbd/image/CloneRequest.h"

#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_rbd_mirror
#undef dout_prefix
#define dout_prefix *_dout << "rbd::mirror::image_replayer::CreateImageRequest: " \
                           << this << " " << __func__

using librbd::util::create_context_callback;
using librbd::util::create_rados_callback;

namespace rbd {
namespace mirror {
namespace image_replayer {

template <typename I>
CreateImageRequest<I>::CreateImageRequest(librados::IoCtx &local_io_ctx,
                                          ContextWQ *work_queue,
                                          const std::string &global_image_id,
                                          const std::string &remote_mirror_uuid,
                                          const std::string &local_image_name,
					  const std::string &local_image_id,
                                          I *remote_image_ctx,
                                          Context *on_finish)
  : m_local_io_ctx(local_io_ctx), m_work_queue(work_queue),
    m_global_image_id(global_image_id),
    m_remote_mirror_uuid(remote_mirror_uuid),
    m_local_image_name(local_image_name), m_local_image_id(local_image_id),
    m_remote_image_ctx(remote_image_ctx), m_on_finish(on_finish) {
}

template <typename I>
void CreateImageRequest<I>::send() {
  int r = validate_parent();
  if (r < 0) {
    error(r);
    return;
  }

  if (m_remote_parent_spec.pool_id == -1) {
    create_image();
  } else {
    get_parent_global_image_id();
  }
}

template <typename I>
void CreateImageRequest<I>::create_image() {
  dout(20) << dendl;

  using klass = CreateImageRequest<I>;
  Context *ctx = create_context_callback<klass, &klass::handle_create_image>(this);

  RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);

  librbd::ImageOptions image_options;
  image_options.set(RBD_IMAGE_OPTION_FEATURES, m_remote_image_ctx->features);
  image_options.set(RBD_IMAGE_OPTION_ORDER, m_remote_image_ctx->order);
  image_options.set(RBD_IMAGE_OPTION_STRIPE_UNIT,
                    m_remote_image_ctx->stripe_unit);
  image_options.set(RBD_IMAGE_OPTION_STRIPE_COUNT,
                    m_remote_image_ctx->stripe_count);

  librbd::image::CreateRequest<I> *req = librbd::image::CreateRequest<I>::create(
    m_local_io_ctx, m_local_image_name, m_local_image_id,
    m_remote_image_ctx->size, image_options, m_global_image_id,
    m_remote_mirror_uuid, false, m_remote_image_ctx->op_work_queue, ctx);
  req->send();
}

template <typename I>
void CreateImageRequest<I>::handle_create_image(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r < 0) {
    derr << ": failed to create local image: " << cpp_strerror(r) << dendl;
    finish(r);
    return;
  }

  finish(0);
}

template <typename I>
void CreateImageRequest<I>::get_parent_global_image_id() {
  dout(20) << dendl;

  librados::ObjectReadOperation op;
  librbd::cls_client::mirror_image_get_start(&op, m_remote_parent_spec.image_id);

  librados::AioCompletion *aio_comp = create_rados_callback<
    CreateImageRequest<I>,
    &CreateImageRequest<I>::handle_get_parent_global_image_id>(this);
  m_out_bl.clear();
  int r = m_remote_parent_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op,
                                             &m_out_bl);
  assert(r == 0);
  aio_comp->release();
}

template <typename I>
void CreateImageRequest<I>::handle_get_parent_global_image_id(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r == 0) {
    cls::rbd::MirrorImage mirror_image;
    bufferlist::iterator iter = m_out_bl.begin();
    r = librbd::cls_client::mirror_image_get_finish(&iter, &mirror_image);
    if (r == 0) {
      m_parent_global_image_id = mirror_image.global_image_id;
      dout(20) << ": parent_global_image_id=" << m_parent_global_image_id
               << dendl;
    }
  }

  if (r == -ENOENT) {
    dout(10) << ": parent image " << m_remote_parent_spec.image_id << " not mirrored"
             << dendl;
    finish(r);
    return;
  } else if (r < 0) {
    derr << ": failed to retrieve global image id for parent image "
         << m_remote_parent_spec.image_id << ": " << cpp_strerror(r) << dendl;
    finish(r);
    return;
  }

  get_local_parent_image_id();
}

template <typename I>
void CreateImageRequest<I>::get_local_parent_image_id() {
  dout(20) << dendl;

  librados::ObjectReadOperation op;
  librbd::cls_client::mirror_image_get_image_id_start(
    &op, m_parent_global_image_id);

  librados::AioCompletion *aio_comp = create_rados_callback<
    CreateImageRequest<I>,
    &CreateImageRequest<I>::handle_get_local_parent_image_id>(this);
  m_out_bl.clear();
  int r = m_local_parent_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op,
                                            &m_out_bl);
  assert(r == 0);
  aio_comp->release();
}

template <typename I>
void CreateImageRequest<I>::handle_get_local_parent_image_id(int r) {
  dout(20) << ": r=" << r << dendl;

  if (r == 0) {
    bufferlist::iterator iter = m_out_bl.begin();
    r = librbd::cls_client::mirror_image_get_image_id_finish(
      &iter, &m_local_parent_spec.image_id);
  }

  if (r == -ENOENT) {
    dout(10) << ": parent image " << m_parent_global_image_id << " not "
             << "registered locally" << dendl;
    finish(r);
    return;
  } else if (r < 0) {
    derr << ": failed to retrieve local image id for parent image "
         << m_parent_global_image_id << ": " << cpp_strerror(r) << dendl;
    finish(r);
    return;
  }

  open_remote_parent_image();
}

template <typename I>
void CreateImageRequest<I>::open_remote_parent_image() {
  dout(20) << dendl;

  Context *ctx = create_context_callback<
    CreateImageRequest<I>,
    &CreateImageRequest<I>::handle_open_remote_parent_image>(this);
  OpenImageRequest<I> *request = OpenImageRequest<I>::create(
    m_remote_parent_io_ctx, &m_remote_parent_image_ctx,
    m_remote_parent_spec.image_id, true, ctx);
  request->send();
}

template <typename I>
void CreateImageRequest<I>::handle_open_remote_parent_image(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r < 0) {
    derr << ": failed to open remote parent image " << m_parent_pool_name << "/"
         << m_remote_parent_spec.image_id << dendl;
    finish(r);
    return;
  }

  open_local_parent_image();
}

template <typename I>
void CreateImageRequest<I>::open_local_parent_image() {
  dout(20) << dendl;

  Context *ctx = create_context_callback<
    CreateImageRequest<I>,
    &CreateImageRequest<I>::handle_open_local_parent_image>(this);
  OpenImageRequest<I> *request = OpenImageRequest<I>::create(
    m_local_parent_io_ctx, &m_local_parent_image_ctx,
    m_local_parent_spec.image_id, true, ctx);
  request->send();
}

template <typename I>
void CreateImageRequest<I>::handle_open_local_parent_image(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r < 0) {
    derr << ": failed to open local parent image " << m_parent_pool_name << "/"
         << m_local_parent_spec.image_id << dendl;
    m_ret_val = r;
    close_remote_parent_image();
    return;
  }

  set_local_parent_snap();
}

template <typename I>
void CreateImageRequest<I>::set_local_parent_snap() {
  dout(20) << dendl;

  {
    RWLock::RLocker remote_snap_locker(m_remote_parent_image_ctx->snap_lock);
    auto it = m_remote_parent_image_ctx->snap_info.find(
      m_remote_parent_spec.snap_id);
    if (it != m_remote_parent_image_ctx->snap_info.end()) {
      m_parent_snap_name = it->second.name;
    }
  }

  if (m_parent_snap_name.empty()) {
    m_ret_val = -ENOENT;
    close_local_parent_image();
    return;
  }
  dout(20) << ": parent_snap_name=" << m_parent_snap_name << dendl;

  Context *ctx = create_context_callback<
    CreateImageRequest<I>,
    &CreateImageRequest<I>::handle_set_local_parent_snap>(this);
  m_local_parent_image_ctx->state->snap_set(cls::rbd::UserSnapshotNamespace(),
					    m_parent_snap_name,
					    ctx);
}

template <typename I>
void CreateImageRequest<I>::handle_set_local_parent_snap(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r < 0) {
    derr << ": failed to set parent snapshot " << m_parent_snap_name
         << ": " << cpp_strerror(r) << dendl;
    m_ret_val = r;
    close_local_parent_image();
    return;
  }

  clone_image();
}

template <typename I>
void CreateImageRequest<I>::clone_image() {
  dout(20) << dendl;

  librbd::ImageOptions opts;
  opts.set(RBD_IMAGE_OPTION_FEATURES, m_remote_image_ctx->features);
  opts.set(RBD_IMAGE_OPTION_ORDER, m_remote_image_ctx->order);
  opts.set(RBD_IMAGE_OPTION_STRIPE_UNIT, m_remote_image_ctx->stripe_unit);
  opts.set(RBD_IMAGE_OPTION_STRIPE_COUNT, m_remote_image_ctx->stripe_count);

  using klass = CreateImageRequest<I>;
  Context *ctx = create_context_callback<klass, &klass::handle_clone_image>(this);

  librbd::image::CloneRequest<I> *req = librbd::image::CloneRequest<I>::create(
    m_local_parent_image_ctx, m_local_io_ctx, m_local_image_name,
    m_local_image_id, opts, m_global_image_id, m_remote_mirror_uuid,
    m_remote_image_ctx->op_work_queue, ctx);
  req->send();
}

template <typename I>
void CreateImageRequest<I>::handle_clone_image(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r < 0) {
    derr << ": failed to clone image " << m_parent_pool_name << "/"
         << m_local_parent_image_ctx->name << " to "
         << m_local_image_name << dendl;
    m_ret_val = r;
  }

  close_local_parent_image();
}

template <typename I>
void CreateImageRequest<I>::close_local_parent_image() {
  dout(20) << dendl;
  Context *ctx = create_context_callback<
    CreateImageRequest<I>,
    &CreateImageRequest<I>::handle_close_local_parent_image>(this);
  CloseImageRequest<I> *request = CloseImageRequest<I>::create(
    &m_local_parent_image_ctx, ctx);
  request->send();
}

template <typename I>
void CreateImageRequest<I>::handle_close_local_parent_image(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r < 0) {
    derr << ": error encountered closing local parent image: "
         << cpp_strerror(r) << dendl;
  }

  close_remote_parent_image();
}

template <typename I>
void CreateImageRequest<I>::close_remote_parent_image() {
  dout(20) << dendl;
  Context *ctx = create_context_callback<
    CreateImageRequest<I>,
    &CreateImageRequest<I>::handle_close_remote_parent_image>(this);
  CloseImageRequest<I> *request = CloseImageRequest<I>::create(
    &m_remote_parent_image_ctx, ctx);
  request->send();
}

template <typename I>
void CreateImageRequest<I>::handle_close_remote_parent_image(int r) {
  dout(20) << ": r=" << r << dendl;
  if (r < 0) {
    derr << ": error encountered closing remote parent image: "
         << cpp_strerror(r) << dendl;
  }

  finish(m_ret_val);
}

template <typename I>
void CreateImageRequest<I>::error(int r) {
  dout(20) << ": r=" << r << dendl;

  m_work_queue->queue(create_context_callback<
    CreateImageRequest<I>, &CreateImageRequest<I>::finish>(this), r);
}

template <typename I>
void CreateImageRequest<I>::finish(int r) {
  dout(20) << ": r=" << r << dendl;
  m_on_finish->complete(r);
  delete this;
}

template <typename I>
int CreateImageRequest<I>::validate_parent() {
  RWLock::RLocker owner_locker(m_remote_image_ctx->owner_lock);
  RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);

  m_remote_parent_spec = m_remote_image_ctx->parent_md.spec;

  // scan all remote snapshots for a linked parent
  for (auto &snap_info_pair : m_remote_image_ctx->snap_info) {
    auto &parent_spec = snap_info_pair.second.parent.spec;
    if (parent_spec.pool_id == -1) {
      continue;
    } else if (m_remote_parent_spec.pool_id == -1) {
      m_remote_parent_spec = parent_spec;
      continue;
    }

    if (m_remote_parent_spec != parent_spec) {
      derr << ": remote image parent spec mismatch" << dendl;
      return -EINVAL;
    }
  }

  if (m_remote_parent_spec.pool_id == -1) {
    return 0;
  }

  // map remote parent pool to local parent pool
  librados::Rados remote_rados(m_remote_image_ctx->md_ctx);
  int r = remote_rados.ioctx_create2(m_remote_parent_spec.pool_id,
                                     m_remote_parent_io_ctx);
  if (r < 0) {
    derr << ": failed to open remote parent pool " << m_remote_parent_spec.pool_id
         << ": " << cpp_strerror(r) << dendl;
    return r;
  }

  m_parent_pool_name = m_remote_parent_io_ctx.get_pool_name();

  librados::Rados local_rados(m_local_io_ctx);
  r = local_rados.ioctx_create(m_parent_pool_name.c_str(),
                               m_local_parent_io_ctx);
  if (r < 0) {
    derr << ": failed to open local parent pool " << m_parent_pool_name << ": "
         << cpp_strerror(r) << dendl;
    return r;
  }

  return 0;
}

} // namespace image_replayer
} // namespace mirror
} // namespace rbd

template class rbd::mirror::image_replayer::CreateImageRequest<librbd::ImageCtx>;
Commit	Line	Data
7c673cae FG	1	// -- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t --
	2	// vim: ts=8 sw=2 smarttab
	3
	4	#include "CreateImageRequest.h"
	5	#include "CloseImageRequest.h"
	6	#include "OpenImageRequest.h"
	7	#include "common/errno.h"
	8	#include "common/WorkQueue.h"
	9	#include "cls/rbd/cls_rbd_client.h"
	10	#include "librbd/ImageCtx.h"
	11	#include "librbd/ImageState.h"
	12	#include "librbd/internal.h"
	13	#include "librbd/Utils.h"
	14	#include "librbd/image/CreateRequest.h"
	15	#include "librbd/image/CloneRequest.h"
	16
	17	#define dout_context g_ceph_context
	18	#define dout_subsys ceph_subsys_rbd_mirror
	19	#undef dout_prefix
	20	#define dout_prefix *_dout << "rbd::mirror::image_replayer::CreateImageRequest: " \
	21	<< this << " " << __func__
	22
	23	using librbd::util::create_context_callback;
	24	using librbd::util::create_rados_callback;
	25
	26	namespace rbd {
	27	namespace mirror {
	28	namespace image_replayer {
	29
	30	template <typename I>
	31	CreateImageRequest<I>::CreateImageRequest(librados::IoCtx &local_io_ctx,
	32	ContextWQ *work_queue,
	33	const std::string &global_image_id,
	34	const std::string &remote_mirror_uuid,
	35	const std::string &local_image_name,
d2e6a577	36	const std::string &local_image_id,
7c673cae	37	I *remote_image_ctx,
7c673cae FG	38	Context *on_finish)
	39	: m_local_io_ctx(local_io_ctx), m_work_queue(work_queue),
	40	m_global_image_id(global_image_id),
	41	m_remote_mirror_uuid(remote_mirror_uuid),
d2e6a577 FG	42	m_local_image_name(local_image_name), m_local_image_id(local_image_id),
d2e6a577 FG	43	m_remote_image_ctx(remote_image_ctx), m_on_finish(on_finish) {
7c673cae FG	44	}
	45
	46	template <typename I>
	47	void CreateImageRequest<I>::send() {
	48	int r = validate_parent();
	49	if (r < 0) {
	50	error(r);
	51	return;
	52	}
	53
	54	if (m_remote_parent_spec.pool_id == -1) {
	55	create_image();
	56	} else {
	57	get_parent_global_image_id();
	58	}
	59	}
	60
	61	template <typename I>
	62	void CreateImageRequest<I>::create_image() {
	63	dout(20) << dendl;
	64
	65	using klass = CreateImageRequest<I>;
	66	Context *ctx = create_context_callback<klass, &klass::handle_create_image>(this);
	67
	68	RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);
	69
	70	librbd::ImageOptions image_options;
	71	image_options.set(RBD_IMAGE_OPTION_FEATURES, m_remote_image_ctx->features);
	72	image_options.set(RBD_IMAGE_OPTION_ORDER, m_remote_image_ctx->order);
	73	image_options.set(RBD_IMAGE_OPTION_STRIPE_UNIT,
	74	m_remote_image_ctx->stripe_unit);
	75	image_options.set(RBD_IMAGE_OPTION_STRIPE_COUNT,
	76	m_remote_image_ctx->stripe_count);
	77
7c673cae	78	librbd::image::CreateRequest<I> *req = librbd::image::CreateRequest<I>::create(
d2e6a577	79	m_local_io_ctx, m_local_image_name, m_local_image_id,
7c673cae FG	80	m_remote_image_ctx->size, image_options, m_global_image_id,
	81	m_remote_mirror_uuid, false, m_remote_image_ctx->op_work_queue, ctx);
	82	req->send();
	83	}
	84
	85	template <typename I>
	86	void CreateImageRequest<I>::handle_create_image(int r) {
	87	dout(20) << ": r=" << r << dendl;
	88	if (r < 0) {
	89	derr << ": failed to create local image: " << cpp_strerror(r) << dendl;
	90	finish(r);
	91	return;
	92	}
	93
	94	finish(0);
	95	}
	96
	97	template <typename I>
	98	void CreateImageRequest<I>::get_parent_global_image_id() {
	99	dout(20) << dendl;
	100
	101	librados::ObjectReadOperation op;
	102	librbd::cls_client::mirror_image_get_start(&op, m_remote_parent_spec.image_id);
	103
	104	librados::AioCompletion *aio_comp = create_rados_callback<
	105	CreateImageRequest<I>,
	106	&CreateImageRequest<I>::handle_get_parent_global_image_id>(this);
	107	m_out_bl.clear();
	108	int r = m_remote_parent_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op,
	109	&m_out_bl);
	110	assert(r == 0);
	111	aio_comp->release();
	112	}
	113
	114	template <typename I>
	115	void CreateImageRequest<I>::handle_get_parent_global_image_id(int r) {
	116	dout(20) << ": r=" << r << dendl;
	117	if (r == 0) {
	118	cls::rbd::MirrorImage mirror_image;
	119	bufferlist::iterator iter = m_out_bl.begin();
	120	r = librbd::cls_client::mirror_image_get_finish(&iter, &mirror_image);
	121	if (r == 0) {
	122	m_parent_global_image_id = mirror_image.global_image_id;
	123	dout(20) << ": parent_global_image_id=" << m_parent_global_image_id
	124	<< dendl;
	125	}
	126	}
	127
	128	if (r == -ENOENT) {
	129	dout(10) << ": parent image " << m_remote_parent_spec.image_id << " not mirrored"
	130	<< dendl;
	131	finish(r);
	132	return;
	133	} else if (r < 0) {
	134	derr << ": failed to retrieve global image id for parent image "
	135	<< m_remote_parent_spec.image_id << ": " << cpp_strerror(r) << dendl;
	136	finish(r);
	137	return;
	138	}
	139
	140	get_local_parent_image_id();
	141	}
	142
	143	template <typename I>
144	void CreateImageRequest<I>::get_local_parent_image_id() {
145	dout(20) << dendl;
146
147	librados::ObjectReadOperation op;
148	librbd::cls_client::mirror_image_get_image_id_start(
149	&op, m_parent_global_image_id);
150
151	librados::AioCompletion *aio_comp = create_rados_callback<
152	CreateImageRequest<I>,
153	&CreateImageRequest<I>::handle_get_local_parent_image_id>(this);
154	m_out_bl.clear();
155	int r = m_local_parent_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op,
156	&m_out_bl);
157	assert(r == 0);
158	aio_comp->release();
159	}
160
161	template <typename I>
162	void CreateImageRequest<I>::handle_get_local_parent_image_id(int r) {
163	dout(20) << ": r=" << r << dendl;
164
165	if (r == 0) {
166	bufferlist::iterator iter = m_out_bl.begin();
167	r = librbd::cls_client::mirror_image_get_image_id_finish(
168	&iter, &m_local_parent_spec.image_id);
169	}
170
171	if (r == -ENOENT) {
172	dout(10) << ": parent image " << m_parent_global_image_id << " not "
173	<< "registered locally" << dendl;
174	finish(r);
175	return;
176	} else if (r < 0) {
177	derr << ": failed to retrieve local image id for parent image "
178	<< m_parent_global_image_id << ": " << cpp_strerror(r) << dendl;
179	finish(r);
180	return;
181	}
182
183	open_remote_parent_image();
184	}
185
186	template <typename I>
187	void CreateImageRequest<I>::open_remote_parent_image() {
188	dout(20) << dendl;
189
190	Context *ctx = create_context_callback<
191	CreateImageRequest<I>,
192	&CreateImageRequest<I>::handle_open_remote_parent_image>(this);
193	OpenImageRequest<I> *request = OpenImageRequest<I>::create(
194	m_remote_parent_io_ctx, &m_remote_parent_image_ctx,
195	m_remote_parent_spec.image_id, true, ctx);
196	request->send();
197	}
198
199	template <typename I>
200	void CreateImageRequest<I>::handle_open_remote_parent_image(int r) {
201	dout(20) << ": r=" << r << dendl;
202	if (r < 0) {
203	derr << ": failed to open remote parent image " << m_parent_pool_name << "/"
204	<< m_remote_parent_spec.image_id << dendl;
205	finish(r);
206	return;
207	}
208
209	open_local_parent_image();
210	}
211
212	template <typename I>
213	void CreateImageRequest<I>::open_local_parent_image() {
214	dout(20) << dendl;
215
216	Context *ctx = create_context_callback<
217	CreateImageRequest<I>,
218	&CreateImageRequest<I>::handle_open_local_parent_image>(this);
219	OpenImageRequest<I> *request = OpenImageRequest<I>::create(
220	m_local_parent_io_ctx, &m_local_parent_image_ctx,
221	m_local_parent_spec.image_id, true, ctx);
222	request->send();
223	}
224
225	template <typename I>
226	void CreateImageRequest<I>::handle_open_local_parent_image(int r) {
227	dout(20) << ": r=" << r << dendl;
228	if (r < 0) {
229	derr << ": failed to open local parent image " << m_parent_pool_name << "/"
230	<< m_local_parent_spec.image_id << dendl;
231	m_ret_val = r;
232	close_remote_parent_image();
233	return;
234	}
235
236	set_local_parent_snap();
237	}
238
239	template <typename I>
240	void CreateImageRequest<I>::set_local_parent_snap() {
241	dout(20) << dendl;
242
243	{
244	RWLock::RLocker remote_snap_locker(m_remote_parent_image_ctx->snap_lock);
245	auto it = m_remote_parent_image_ctx->snap_info.find(
246	m_remote_parent_spec.snap_id);
247	if (it != m_remote_parent_image_ctx->snap_info.end()) {
248	m_parent_snap_name = it->second.name;
249	}
250	}
251
252	if (m_parent_snap_name.empty()) {
253	m_ret_val = -ENOENT;
254	close_local_parent_image();
255	return;
256	}
257	dout(20) << ": parent_snap_name=" << m_parent_snap_name << dendl;
258
259	Context *ctx = create_context_callback<
260	CreateImageRequest<I>,
261	&CreateImageRequest<I>::handle_set_local_parent_snap>(this);
262	m_local_parent_image_ctx->state->snap_set(cls::rbd::UserSnapshotNamespace(),
263	m_parent_snap_name,
264	ctx);
265	}
266
267	template <typename I>
268	void CreateImageRequest<I>::handle_set_local_parent_snap(int r) {
269	dout(20) << ": r=" << r << dendl;
270	if (r < 0) {
271	derr << ": failed to set parent snapshot " << m_parent_snap_name
272	<< ": " << cpp_strerror(r) << dendl;
273	m_ret_val = r;
274	close_local_parent_image();
275	return;
276	}
277
278	clone_image();
279	}
280
281	template <typename I>
282	void CreateImageRequest<I>::clone_image() {
283	dout(20) << dendl;
284
285	librbd::ImageOptions opts;
286	opts.set(RBD_IMAGE_OPTION_FEATURES, m_remote_image_ctx->features);
287	opts.set(RBD_IMAGE_OPTION_ORDER, m_remote_image_ctx->order);
288	opts.set(RBD_IMAGE_OPTION_STRIPE_UNIT, m_remote_image_ctx->stripe_unit);
289	opts.set(RBD_IMAGE_OPTION_STRIPE_COUNT, m_remote_image_ctx->stripe_count);
290
7c673cae FG	291	using klass = CreateImageRequest<I>;
	292	Context *ctx = create_context_callback<klass, &klass::handle_clone_image>(this);
	293
	294	librbd::image::CloneRequest<I> *req = librbd::image::CloneRequest<I>::create(
	295	m_local_parent_image_ctx, m_local_io_ctx, m_local_image_name,
d2e6a577	296	m_local_image_id, opts, m_global_image_id, m_remote_mirror_uuid,
7c673cae FG	297	m_remote_image_ctx->op_work_queue, ctx);
	298	req->send();
	299	}
	300
	301	template <typename I>
	302	void CreateImageRequest<I>::handle_clone_image(int r) {
	303	dout(20) << ": r=" << r << dendl;
	304	if (r < 0) {
	305	derr << ": failed to clone image " << m_parent_pool_name << "/"
	306	<< m_local_parent_image_ctx->name << " to "
	307	<< m_local_image_name << dendl;
	308	m_ret_val = r;
	309	}
	310
	311	close_local_parent_image();
	312	}
	313
	314	template <typename I>
	315	void CreateImageRequest<I>::close_local_parent_image() {
	316	dout(20) << dendl;
	317	Context *ctx = create_context_callback<
	318	CreateImageRequest<I>,
	319	&CreateImageRequest<I>::handle_close_local_parent_image>(this);
	320	CloseImageRequest<I> *request = CloseImageRequest<I>::create(
	321	&m_local_parent_image_ctx, ctx);
	322	request->send();
	323	}
	324
	325	template <typename I>
	326	void CreateImageRequest<I>::handle_close_local_parent_image(int r) {
	327	dout(20) << ": r=" << r << dendl;
	328	if (r < 0) {
	329	derr << ": error encountered closing local parent image: "
	330	<< cpp_strerror(r) << dendl;
	331	}
	332
	333	close_remote_parent_image();
	334	}
	335
	336	template <typename I>
	337	void CreateImageRequest<I>::close_remote_parent_image() {
	338	dout(20) << dendl;
	339	Context *ctx = create_context_callback<
	340	CreateImageRequest<I>,
	341	&CreateImageRequest<I>::handle_close_remote_parent_image>(this);
	342	CloseImageRequest<I> *request = CloseImageRequest<I>::create(
	343	&m_remote_parent_image_ctx, ctx);
	344	request->send();
	345	}
	346
	347	template <typename I>
	348	void CreateImageRequest<I>::handle_close_remote_parent_image(int r) {
	349	dout(20) << ": r=" << r << dendl;
	350	if (r < 0) {
	351	derr << ": error encountered closing remote parent image: "
	352	<< cpp_strerror(r) << dendl;
	353	}
	354
	355	finish(m_ret_val);
	356	}
	357
	358	template <typename I>
	359	void CreateImageRequest<I>::error(int r) {
	360	dout(20) << ": r=" << r << dendl;
361
362	m_work_queue->queue(create_context_callback<
363	CreateImageRequest<I>, &CreateImageRequest<I>::finish>(this), r);
364	}
365
366	template <typename I>
367	void CreateImageRequest<I>::finish(int r) {
368	dout(20) << ": r=" << r << dendl;
369	m_on_finish->complete(r);
370	delete this;
371	}
372
373	template <typename I>
374	int CreateImageRequest<I>::validate_parent() {
375	RWLock::RLocker owner_locker(m_remote_image_ctx->owner_lock);
376	RWLock::RLocker snap_locker(m_remote_image_ctx->snap_lock);
377
378	m_remote_parent_spec = m_remote_image_ctx->parent_md.spec;
379
380	// scan all remote snapshots for a linked parent
381	for (auto &snap_info_pair : m_remote_image_ctx->snap_info) {
382	auto &parent_spec = snap_info_pair.second.parent.spec;
383	if (parent_spec.pool_id == -1) {
384	continue;
385	} else if (m_remote_parent_spec.pool_id == -1) {
386	m_remote_parent_spec = parent_spec;
387	continue;
388	}
389
390	if (m_remote_parent_spec != parent_spec) {
391	derr << ": remote image parent spec mismatch" << dendl;
392	return -EINVAL;
393	}
394	}
395
396	if (m_remote_parent_spec.pool_id == -1) {
397	return 0;
398	}
399
400	// map remote parent pool to local parent pool
401	librados::Rados remote_rados(m_remote_image_ctx->md_ctx);
402	int r = remote_rados.ioctx_create2(m_remote_parent_spec.pool_id,
403	m_remote_parent_io_ctx);
404	if (r < 0) {
405	derr << ": failed to open remote parent pool " << m_remote_parent_spec.pool_id
406	<< ": " << cpp_strerror(r) << dendl;
407	return r;
408	}
409
410	m_parent_pool_name = m_remote_parent_io_ctx.get_pool_name();
411
412	librados::Rados local_rados(m_local_io_ctx);
413	r = local_rados.ioctx_create(m_parent_pool_name.c_str(),
414	m_local_parent_io_ctx);
415	if (r < 0) {
416	derr << ": failed to open local parent pool " << m_parent_pool_name << ": "
417	<< cpp_strerror(r) << dendl;
418	return r;
419	}
420
421	return 0;
422	}
423
424	} // namespace image_replayer
425	} // namespace mirror
426	} // namespace rbd
427
428	template class rbd::mirror::image_replayer::CreateImageRequest<librbd::ImageCtx>;