[ceph.git] / ceph / src / tools / rbd / action / Migration.cc

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

#include "include/compat.h"
#include "common/errno.h"
#include "common/safe_io.h"

#include "tools/rbd/ArgumentTypes.h"
#include "tools/rbd/Shell.h"
#include "tools/rbd/Utils.h"

#include <sys/types.h>
#include <fcntl.h>
#include <iostream>
#include <boost/program_options.hpp>

namespace rbd {
namespace action {
namespace migration {

namespace at = argument_types;
namespace po = boost::program_options;

static int do_execute(librados::IoCtx& io_ctx, const std::string &image_name,
                      bool no_progress) {
  utils::ProgressContext pc("Image migration", no_progress);
  int r = librbd::RBD().migration_execute_with_progress(io_ctx,
                                                        image_name.c_str(), pc);
  if (r < 0) {
    pc.fail();
    std::cerr << "rbd: migration failed: " << cpp_strerror(r) << std::endl;
    return r;
  }
  pc.finish();
  return 0;
}

static int do_abort(librados::IoCtx& io_ctx, const std::string &image_name,
                    bool no_progress) {
  utils::ProgressContext pc("Abort image migration", no_progress);
  int r = librbd::RBD().migration_abort_with_progress(io_ctx,
                                                      image_name.c_str(), pc);
  if (r < 0) {
    pc.fail();
    std::cerr << "rbd: aborting migration failed: " << cpp_strerror(r)
              << std::endl;
    return r;
  }
  pc.finish();
  return 0;
}

static int do_commit(librados::IoCtx& io_ctx, const std::string &image_name,
                     bool force, bool no_progress) {
  librbd::image_migration_status_t migration_status;
  int r = librbd::RBD().migration_status(io_ctx, image_name.c_str(),
                                         &migration_status,
                                         sizeof(migration_status));
  if (r < 0) {
    std::cerr << "rbd: getting migration status failed: " << cpp_strerror(r)
              << std::endl;
    return r;
  }

  librados::IoCtx dst_io_ctx;
  r = librados::Rados(io_ctx).ioctx_create2(migration_status.dest_pool_id, dst_io_ctx);
  if (r < 0) {
    std::cerr << "rbd: accessing source pool id="
              << migration_status.dest_pool_id << " failed: "
              << cpp_strerror(r) << std::endl;
    return r;
  }

  r = utils::set_namespace(migration_status.dest_pool_namespace, &dst_io_ctx);
  if (r < 0) {
    return r;
  }

  librbd::Image image;
  r = utils::open_image_by_id(dst_io_ctx, migration_status.dest_image_id,
                              true, &image);
  if (r < 0) {
    return r;
  }

  std::vector<librbd::linked_image_spec_t> children;
  r = image.list_descendants(&children);
  if (r < 0) {
    std::cerr << "rbd: listing descendants failed: " << cpp_strerror(r)
              << std::endl;
    return r;
  }

  if (children.size() > 0) {
    std::cerr << "rbd: the image has "
              << (children.size() == 1 ? "a descendant" : "descendants") << ": "
              << std::endl;
    for (auto& child : children) {
      std::cerr << "  " << child.pool_name << "/";
      if (!child.pool_namespace.empty()) {
        std::cerr << child.pool_namespace << "/";
      }
      std::cerr << child.image_name;
      if (child.trash) {
        std::cerr << " (trash " << child.image_id << ")";
      }
      std::cerr << std::endl;
    }
    std::cerr << "Warning: in-use, read-only descendant images"
              << " will not detect the parent update." << std::endl;
    if (force) {
      std::cerr << "Proceeding anyway due to force flag set." << std::endl;
    } else {
      std::cerr << "Ensure no descendant images are opened read-only"
                << " and run again with force flag." << std::endl;
      return -EBUSY;
    }
  }

  utils::ProgressContext pc("Commit image migration", no_progress);
  r = librbd::RBD().migration_commit_with_progress(io_ctx, image_name.c_str(),
                                                   pc);
  if (r < 0) {
    pc.fail();
    std::cerr << "rbd: committing migration failed: " << cpp_strerror(r)
              << std::endl;
    return r;
  }
  pc.finish();
  return 0;
}

void get_prepare_arguments(po::options_description *positional,
                           po::options_description *options) {
  options->add_options()
    ("import-only", po::bool_switch(), "only import data from source")
    ("source-spec-path", po::value<std::string>(),
     "source-spec file (or '-' for stdin)")
    ("source-spec", po::value<std::string>(),
     "source-spec");
  at::add_image_or_snap_spec_options(positional, options,
                                     at::ARGUMENT_MODIFIER_SOURCE);
  at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_DEST);
  at::add_create_image_options(options, true);
  at::add_flatten_option(options);
}

int execute_prepare(const po::variables_map &vm,
                    const std::vector<std::string> &ceph_global_init_args) {
  bool import_only = vm["import-only"].as<bool>();

  size_t arg_index = 0;
  std::string pool_name;
  std::string namespace_name;
  std::string image_name;
  std::string snap_name;
  int r = utils::get_pool_image_snapshot_names(
    vm, at::ARGUMENT_MODIFIER_SOURCE, &arg_index, &pool_name, &namespace_name,
    &image_name, import_only ? &snap_name : nullptr, true,
    import_only ? utils::SNAPSHOT_PRESENCE_PERMITTED :
                  utils::SNAPSHOT_PRESENCE_NONE,
    utils::SPEC_VALIDATION_NONE);
  if (r < 0) {
    return r;
  }

  std::string dst_pool_name;
  std::string dst_namespace_name;
  std::string dst_image_name;
  r = utils::get_pool_image_snapshot_names(
    vm, at::ARGUMENT_MODIFIER_DEST, &arg_index, &dst_pool_name,
    &dst_namespace_name, &dst_image_name, nullptr, false,
    utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_FULL);
  if (r < 0) {
    return r;
  }

  std::string source_spec;
  if (vm.count("source-spec") && vm.count("source-spec-path")) {
    std::cerr << "rbd: cannot specify both source-spec and source-spec-path"
              << std::endl;
    return -EINVAL;
  } else if (vm.count("source-spec-path")) {
    std::string source_spec_path = vm["source-spec-path"].as<std::string>();

    int fd = STDIN_FILENO;
    if (source_spec_path != "-") {
      fd = open(source_spec_path.c_str(), O_RDONLY);
      if (fd < 0) {
        r = -errno;
        std::cerr << "rbd: error opening " << source_spec_path << std::endl;
        return r;
      }
    }

    source_spec.resize(4096);
    r = safe_read(fd, source_spec.data(), source_spec.size() - 1);
    if (fd != STDIN_FILENO) {
      VOID_TEMP_FAILURE_RETRY(close(fd));
    }

    if (r >= 0) {
      source_spec.resize(r);
    } else {
      std::cerr << "rbd: error reading source-spec file: " << cpp_strerror(r)
                << std::endl;
      return r;
    }
  } else if (vm.count("source-spec")) {
    source_spec = vm["source-spec"].as<std::string>();
  }

  librados::Rados rados;
  librados::IoCtx io_ctx;
  r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
  if (r < 0) {
    return r;
  }

  librados::IoCtx dst_io_ctx;
  if (source_spec.empty()) {
    utils::normalize_pool_name(&dst_pool_name);
    r = utils::init_io_ctx(rados, dst_pool_name, dst_namespace_name,
                           &dst_io_ctx);
    if (r < 0) {
      return r;
    }
  }

  if (import_only && source_spec.empty()) {
    if (snap_name.empty()) {
      std::cerr << "rbd: snapshot name was not specified" << std::endl;
      return -EINVAL;
    }

    std::stringstream ss;
    ss << R"({)"
       << R"("type":"native",)"
       << R"("pool_id":)" << io_ctx.get_id() << R"(,)"
       << R"("pool_namespace":")" << io_ctx.get_namespace() << R"(",)"
       << R"("image_name":")" << image_name << R"(",)"
       << R"("snap_name":")" << snap_name << R"(")"
       << R"(})";
    source_spec = ss.str();

    if (dst_image_name.empty()) {
      std::cerr << "rbd: destination image name must be provided" << std::endl;
      return -EINVAL;
    }
    io_ctx = dst_io_ctx;
    image_name = dst_image_name;
    snap_name = "";
  } else if (!import_only && !source_spec.empty()) {
    std::cerr << "rbd: --import-only must be used in combination with "
              << "source-spec/source-spec-path" << std::endl;
    return -EINVAL;
  }

  if (!snap_name.empty()) {
    std::cerr << "rbd: snapshot name specified for a command that doesn't "
              << "use it" << std::endl;
    return -EINVAL;
  }

  librbd::ImageOptions opts;
  r = utils::get_image_options(vm, true, &opts);
  if (r < 0) {
    return r;
  }

  if (source_spec.empty()) {
    if (dst_image_name.empty()) {
      dst_image_name = image_name;
    }

    int r = librbd::RBD().migration_prepare(io_ctx, image_name.c_str(),
                                            dst_io_ctx, dst_image_name.c_str(),
                                            opts);
    if (r < 0) {
      std::cerr << "rbd: preparing migration failed: " << cpp_strerror(r)
                << std::endl;
      return r;
    }
  } else {
    ceph_assert(import_only);
    r = librbd::RBD().migration_prepare_import(source_spec.c_str(), io_ctx,
                                               image_name.c_str(), opts);
    if (r < 0) {
      std::cerr << "rbd: preparing import migration failed: " << cpp_strerror(r)
                << std::endl;
      return r;
    }
  }

  return 0;
}

void get_execute_arguments(po::options_description *positional,
                           po::options_description *options) {
  at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
  at::add_no_progress_option(options);
}

int execute_execute(const po::variables_map &vm,
                    const std::vector<std::string> &ceph_global_init_args) {
  size_t arg_index = 0;
  std::string pool_name;
  std::string namespace_name;
  std::string image_name;
  int r = utils::get_pool_image_snapshot_names(
    vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
    &image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE,
    utils::SPEC_VALIDATION_NONE);
  if (r < 0) {
    return r;
  }

  librados::Rados rados;
  librados::IoCtx io_ctx;
  r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
  if (r < 0) {
    return r;
  }
  io_ctx.set_pool_full_try();

  r = do_execute(io_ctx, image_name, vm[at::NO_PROGRESS].as<bool>());
  if (r < 0) {
    return r;
  }

  return 0;
}

void get_abort_arguments(po::options_description *positional,
                          po::options_description *options) {
  at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
  at::add_no_progress_option(options);
}

int execute_abort(const po::variables_map &vm,
                  const std::vector<std::string> &ceph_global_init_args) {
  size_t arg_index = 0;
  std::string pool_name;
  std::string namespace_name;
  std::string image_name;
  int r = utils::get_pool_image_snapshot_names(
    vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
    &image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE,
    utils::SPEC_VALIDATION_NONE);
  if (r < 0) {
    return r;
  }

  librados::Rados rados;
  librados::IoCtx io_ctx;
  r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
  if (r < 0) {
    return r;
  }
  io_ctx.set_pool_full_try();

  r = do_abort(io_ctx, image_name, vm[at::NO_PROGRESS].as<bool>());
  if (r < 0) {
    return r;
  }

  return 0;
}

void get_commit_arguments(po::options_description *positional,
                          po::options_description *options) {
  at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
  at::add_no_progress_option(options);
  options->add_options()
      ("force", po::bool_switch(), "proceed even if the image has children");
}

int execute_commit(const po::variables_map &vm,
                   const std::vector<std::string> &ceph_global_init_args) {
  size_t arg_index = 0;
  std::string pool_name;
  std::string namespace_name;
  std::string image_name;
  int r = utils::get_pool_image_snapshot_names(
    vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
    &image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE,
    utils::SPEC_VALIDATION_NONE);
  if (r < 0) {
    return r;
  }

  librados::Rados rados;
  librados::IoCtx io_ctx;
  r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
  if (r < 0) {
    return r;
  }
  io_ctx.set_pool_full_try();

  r = do_commit(io_ctx, image_name, vm["force"].as<bool>(),
                vm[at::NO_PROGRESS].as<bool>());
  if (r < 0) {
    return r;
  }

  return 0;
}

Shell::Action action_prepare(
  {"migration", "prepare"}, {}, "Prepare image migration.",
  at::get_long_features_help(), &get_prepare_arguments, &execute_prepare);

Shell::Action action_execute(
  {"migration", "execute"}, {}, "Execute image migration.", "",
  &get_execute_arguments, &execute_execute);

Shell::Action action_abort(
  {"migration", "abort"}, {}, "Cancel interrupted image migration.", "",
  &get_abort_arguments, &execute_abort);

Shell::Action action_commit(
  {"migration", "commit"}, {}, "Commit image migration.", "",
  &get_commit_arguments, &execute_commit);

} // namespace migration
} // namespace action
} // namespace rbd
Commit	Line	Data
11fdf7f2 TL	1	// -- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t --
	2	// vim: ts=8 sw=2 smarttab
	3
f67539c2	4	#include "include/compat.h"
11fdf7f2	5	#include "common/errno.h"
f67539c2	6	#include "common/safe_io.h"
11fdf7f2 TL	7
	8	#include "tools/rbd/ArgumentTypes.h"
	9	#include "tools/rbd/Shell.h"
	10	#include "tools/rbd/Utils.h"
	11
f67539c2 TL	12	#include <sys/types.h>
f67539c2 TL	13	#include <fcntl.h>
11fdf7f2 TL	14	#include <iostream>
	15	#include <boost/program_options.hpp>
	16
	17	namespace rbd {
	18	namespace action {
	19	namespace migration {
	20
	21	namespace at = argument_types;
	22	namespace po = boost::program_options;
	23
11fdf7f2 TL	24	static int do_execute(librados::IoCtx& io_ctx, const std::string &image_name,
	25	bool no_progress) {
	26	utils::ProgressContext pc("Image migration", no_progress);
	27	int r = librbd::RBD().migration_execute_with_progress(io_ctx,
	28	image_name.c_str(), pc);
	29	if (r < 0) {
	30	pc.fail();
	31	std::cerr << "rbd: migration failed: " << cpp_strerror(r) << std::endl;
	32	return r;
	33	}
	34	pc.finish();
	35	return 0;
	36	}
	37
	38	static int do_abort(librados::IoCtx& io_ctx, const std::string &image_name,
	39	bool no_progress) {
	40	utils::ProgressContext pc("Abort image migration", no_progress);
	41	int r = librbd::RBD().migration_abort_with_progress(io_ctx,
	42	image_name.c_str(), pc);
	43	if (r < 0) {
	44	pc.fail();
	45	std::cerr << "rbd: aborting migration failed: " << cpp_strerror(r)
	46	<< std::endl;
	47	return r;
	48	}
	49	pc.finish();
	50	return 0;
	51	}
	52
	53	static int do_commit(librados::IoCtx& io_ctx, const std::string &image_name,
	54	bool force, bool no_progress) {
	55	librbd::image_migration_status_t migration_status;
	56	int r = librbd::RBD().migration_status(io_ctx, image_name.c_str(),
	57	&migration_status,
	58	sizeof(migration_status));
	59	if (r < 0) {
	60	std::cerr << "rbd: getting migration status failed: " << cpp_strerror(r)
	61	<< std::endl;
	62	return r;
	63	}
	64
	65	librados::IoCtx dst_io_ctx;
	66	r = librados::Rados(io_ctx).ioctx_create2(migration_status.dest_pool_id, dst_io_ctx);
	67	if (r < 0) {
	68	std::cerr << "rbd: accessing source pool id="
	69	<< migration_status.dest_pool_id << " failed: "
	70	<< cpp_strerror(r) << std::endl;
	71	return r;
	72	}
	73
	74	r = utils::set_namespace(migration_status.dest_pool_namespace, &dst_io_ctx);
	75	if (r < 0) {
	76	return r;
	77	}
	78
	79	librbd::Image image;
	80	r = utils::open_image_by_id(dst_io_ctx, migration_status.dest_image_id,
	81	true, &image);
	82	if (r < 0) {
	83	return r;
	84	}
	85
	86	std::vector<librbd::linked_image_spec_t> children;
	87	r = image.list_descendants(&children);
88	if (r < 0) {
89	std::cerr << "rbd: listing descendants failed: " << cpp_strerror(r)
90	<< std::endl;
91	return r;
92	}
93
94	if (children.size() > 0) {
95	std::cerr << "rbd: the image has "
96	<< (children.size() == 1 ? "a descendant" : "descendants") << ": "
97	<< std::endl;
98	for (auto& child : children) {
99	std::cerr << " " << child.pool_name << "/";
100	if (!child.pool_namespace.empty()) {
101	std::cerr << child.pool_namespace << "/";
102	}
103	std::cerr << child.image_name;
104	if (child.trash) {
105	std::cerr << " (trash " << child.image_id << ")";
106	}
107	std::cerr << std::endl;
108	}
109	std::cerr << "Warning: in-use, read-only descendant images"
110	<< " will not detect the parent update." << std::endl;
111	if (force) {
112	std::cerr << "Proceeding anyway due to force flag set." << std::endl;
113	} else {
114	std::cerr << "Ensure no descendant images are opened read-only"
115	<< " and run again with force flag." << std::endl;
116	return -EBUSY;
117	}
118	}
119
120	utils::ProgressContext pc("Commit image migration", no_progress);
121	r = librbd::RBD().migration_commit_with_progress(io_ctx, image_name.c_str(),
122	pc);
123	if (r < 0) {
124	pc.fail();
125	std::cerr << "rbd: committing migration failed: " << cpp_strerror(r)
126	<< std::endl;
127	return r;
128	}
129	pc.finish();
130	return 0;
131	}
132
133	void get_prepare_arguments(po::options_description *positional,
134	po::options_description *options) {
f67539c2 TL	135	options->add_options()
	136	("import-only", po::bool_switch(), "only import data from source")
	137	("source-spec-path", po::value<std::string>(),
	138	"source-spec file (or '-' for stdin)")
	139	("source-spec", po::value<std::string>(),
	140	"source-spec");
	141	at::add_image_or_snap_spec_options(positional, options,
	142	at::ARGUMENT_MODIFIER_SOURCE);
11fdf7f2 TL	143	at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_DEST);
	144	at::add_create_image_options(options, true);
	145	at::add_flatten_option(options);
	146	}
	147
	148	int execute_prepare(const po::variables_map &vm,
	149	const std::vector<std::string> &ceph_global_init_args) {
f67539c2 TL	150	bool import_only = vm["import-only"].as<bool>();
f67539c2 TL	151
11fdf7f2 TL	152	size_t arg_index = 0;
	153	std::string pool_name;
	154	std::string namespace_name;
	155	std::string image_name;
f67539c2	156	std::string snap_name;
11fdf7f2 TL	157	int r = utils::get_pool_image_snapshot_names(
11fdf7f2 TL	158	vm, at::ARGUMENT_MODIFIER_SOURCE, &arg_index, &pool_name, &namespace_name,
f67539c2 TL	159	&image_name, import_only ? &snap_name : nullptr, true,
	160	import_only ? utils::SNAPSHOT_PRESENCE_PERMITTED :
	161	utils::SNAPSHOT_PRESENCE_NONE,
11fdf7f2 TL	162	utils::SPEC_VALIDATION_NONE);
	163	if (r < 0) {
	164	return r;
	165	}
	166
f67539c2 TL	167	std::string dst_pool_name;
	168	std::string dst_namespace_name;
	169	std::string dst_image_name;
	170	r = utils::get_pool_image_snapshot_names(
	171	vm, at::ARGUMENT_MODIFIER_DEST, &arg_index, &dst_pool_name,
	172	&dst_namespace_name, &dst_image_name, nullptr, false,
	173	utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_FULL);
	174	if (r < 0) {
	175	return r;
	176	}
	177
	178	std::string source_spec;
	179	if (vm.count("source-spec") && vm.count("source-spec-path")) {
b3b6e05e TL	180	std::cerr << "rbd: cannot specify both source-spec and source-spec-path"
b3b6e05e TL	181	<< std::endl;
f67539c2 TL	182	return -EINVAL;
	183	} else if (vm.count("source-spec-path")) {
	184	std::string source_spec_path = vm["source-spec-path"].as<std::string>();
	185
	186	int fd = STDIN_FILENO;
	187	if (source_spec_path != "-") {
	188	fd = open(source_spec_path.c_str(), O_RDONLY);
	189	if (fd < 0) {
	190	r = -errno;
	191	std::cerr << "rbd: error opening " << source_spec_path << std::endl;
	192	return r;
	193	}
	194	}
	195
	196	source_spec.resize(4096);
	197	r = safe_read(fd, source_spec.data(), source_spec.size() - 1);
	198	if (fd != STDIN_FILENO) {
	199	VOID_TEMP_FAILURE_RETRY(close(fd));
	200	}
	201
	202	if (r >= 0) {
	203	source_spec.resize(r);
	204	} else {
	205	std::cerr << "rbd: error reading source-spec file: " << cpp_strerror(r)
	206	<< std::endl;
	207	return r;
	208	}
	209	} else if (vm.count("source-spec")) {
	210	source_spec = vm["source-spec"].as<std::string>();
	211	}
	212
11fdf7f2 TL	213	librados::Rados rados;
	214	librados::IoCtx io_ctx;
	215	r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
	216	if (r < 0) {
	217	return r;
	218	}
11fdf7f2	219
f67539c2 TL	220	librados::IoCtx dst_io_ctx;
	221	if (source_spec.empty()) {
	222	utils::normalize_pool_name(&dst_pool_name);
	223	r = utils::init_io_ctx(rados, dst_pool_name, dst_namespace_name,
	224	&dst_io_ctx);
	225	if (r < 0) {
	226	return r;
	227	}
	228	}
	229
	230	if (import_only && source_spec.empty()) {
	231	if (snap_name.empty()) {
	232	std::cerr << "rbd: snapshot name was not specified" << std::endl;
	233	return -EINVAL;
	234	}
	235
	236	std::stringstream ss;
	237	ss << R"({)"
	238	<< R"("type":"native",)"
	239	<< R"("pool_id":)" << io_ctx.get_id() << R"(,)"
	240	<< R"("pool_namespace":")" << io_ctx.get_namespace() << R"(",)"
	241	<< R"("image_name":")" << image_name << R"(",)"
	242	<< R"("snap_name":")" << snap_name << R"(")"
	243	<< R"(})";
	244	source_spec = ss.str();
	245
	246	if (dst_image_name.empty()) {
	247	std::cerr << "rbd: destination image name must be provided" << std::endl;
	248	return -EINVAL;
	249	}
	250	io_ctx = dst_io_ctx;
	251	image_name = dst_image_name;
	252	snap_name = "";
	253	} else if (!import_only && !source_spec.empty()) {
	254	std::cerr << "rbd: --import-only must be used in combination with "
	255	<< "source-spec/source-spec-path" << std::endl;
	256	return -EINVAL;
	257	}
	258
	259	if (!snap_name.empty()) {
	260	std::cerr << "rbd: snapshot name specified for a command that doesn't "
	261	<< "use it" << std::endl;
	262	return -EINVAL;
11fdf7f2 TL	263	}
	264
	265	librbd::ImageOptions opts;
	266	r = utils::get_image_options(vm, true, &opts);
	267	if (r < 0) {
	268	return r;
	269	}
	270
f67539c2 TL	271	if (source_spec.empty()) {
	272	if (dst_image_name.empty()) {
	273	dst_image_name = image_name;
	274	}
	275
	276	int r = librbd::RBD().migration_prepare(io_ctx, image_name.c_str(),
	277	dst_io_ctx, dst_image_name.c_str(),
	278	opts);
11fdf7f2	279	if (r < 0) {
f67539c2 TL	280	std::cerr << "rbd: preparing migration failed: " << cpp_strerror(r)
	281	<< std::endl;
	282	return r;
	283	}
	284	} else {
	285	ceph_assert(import_only);
	286	r = librbd::RBD().migration_prepare_import(source_spec.c_str(), io_ctx,
	287	image_name.c_str(), opts);
	288	if (r < 0) {
	289	std::cerr << "rbd: preparing import migration failed: " << cpp_strerror(r)
	290	<< std::endl;
11fdf7f2 TL	291	return r;
11fdf7f2 TL	292	}
11fdf7f2 TL	293	}
	294
	295	return 0;
	296	}
	297
	298	void get_execute_arguments(po::options_description *positional,
	299	po::options_description *options) {
	300	at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
	301	at::add_no_progress_option(options);
	302	}
	303
	304	int execute_execute(const po::variables_map &vm,
	305	const std::vector<std::string> &ceph_global_init_args) {
	306	size_t arg_index = 0;
	307	std::string pool_name;
	308	std::string namespace_name;
	309	std::string image_name;
	310	int r = utils::get_pool_image_snapshot_names(
	311	vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
	312	&image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE,
	313	utils::SPEC_VALIDATION_NONE);
	314	if (r < 0) {
	315	return r;
	316	}
	317
	318	librados::Rados rados;
	319	librados::IoCtx io_ctx;
	320	r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
	321	if (r < 0) {
	322	return r;
	323	}
9f95a23c	324	io_ctx.set_pool_full_try();
11fdf7f2 TL	325
	326	r = do_execute(io_ctx, image_name, vm[at::NO_PROGRESS].as<bool>());
	327	if (r < 0) {
	328	return r;
	329	}
	330
	331	return 0;
	332	}
	333
	334	void get_abort_arguments(po::options_description *positional,
	335	po::options_description *options) {
	336	at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
	337	at::add_no_progress_option(options);
	338	}
	339
	340	int execute_abort(const po::variables_map &vm,
	341	const std::vector<std::string> &ceph_global_init_args) {
	342	size_t arg_index = 0;
	343	std::string pool_name;
	344	std::string namespace_name;
	345	std::string image_name;
	346	int r = utils::get_pool_image_snapshot_names(
	347	vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
	348	&image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE,
	349	utils::SPEC_VALIDATION_NONE);
	350	if (r < 0) {
	351	return r;
	352	}
	353
	354	librados::Rados rados;
	355	librados::IoCtx io_ctx;
	356	r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
	357	if (r < 0) {
	358	return r;
	359	}
9f95a23c	360	io_ctx.set_pool_full_try();
11fdf7f2 TL	361
	362	r = do_abort(io_ctx, image_name, vm[at::NO_PROGRESS].as<bool>());
	363	if (r < 0) {
	364	return r;
	365	}
	366
	367	return 0;
	368	}
	369
	370	void get_commit_arguments(po::options_description *positional,
	371	po::options_description *options) {
	372	at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
	373	at::add_no_progress_option(options);
	374	options->add_options()
	375	("force", po::bool_switch(), "proceed even if the image has children");
	376	}
	377
	378	int execute_commit(const po::variables_map &vm,
	379	const std::vector<std::string> &ceph_global_init_args) {
	380	size_t arg_index = 0;
	381	std::string pool_name;
	382	std::string namespace_name;
	383	std::string image_name;
	384	int r = utils::get_pool_image_snapshot_names(
	385	vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
	386	&image_name, nullptr, true, utils::SNAPSHOT_PRESENCE_NONE,
	387	utils::SPEC_VALIDATION_NONE);
	388	if (r < 0) {
	389	return r;
	390	}
	391
	392	librados::Rados rados;
	393	librados::IoCtx io_ctx;
	394	r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
	395	if (r < 0) {
	396	return r;
	397	}
9f95a23c	398	io_ctx.set_pool_full_try();
11fdf7f2 TL	399
	400	r = do_commit(io_ctx, image_name, vm["force"].as<bool>(),
	401	vm[at::NO_PROGRESS].as<bool>());
	402	if (r < 0) {
	403	return r;
	404	}
	405
	406	return 0;
	407	}
	408
	409	Shell::Action action_prepare(
	410	{"migration", "prepare"}, {}, "Prepare image migration.",
	411	at::get_long_features_help(), &get_prepare_arguments, &execute_prepare);
	412
	413	Shell::Action action_execute(
	414	{"migration", "execute"}, {}, "Execute image migration.", "",
	415	&get_execute_arguments, &execute_execute);
	416
	417	Shell::Action action_abort(
	418	{"migration", "abort"}, {}, "Cancel interrupted image migration.", "",
	419	&get_abort_arguments, &execute_abort);
	420
	421	Shell::Action action_commit(
	422	{"migration", "commit"}, {}, "Commit image migration.", "",
	423	&get_commit_arguments, &execute_commit);
	424
	425	} // namespace migration
	426	} // namespace action
	427	} // namespace rbd