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-rw-r--r--src/tools/rbd/action/Migration.cc429
1 files changed, 429 insertions, 0 deletions
diff --git a/src/tools/rbd/action/Migration.cc b/src/tools/rbd/action/Migration.cc
new file mode 100644
index 000000000..1ce6201d9
--- /dev/null
+++ b/src/tools/rbd/action/Migration.cc
@@ -0,0 +1,429 @@
+// -*- 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::SwitchArguments switched_arguments({"import-only"});
+
+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