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Diffstat (limited to '')
| -rw-r--r-- | src/tools/rbd/action/Nbd.cc | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/src/tools/rbd/action/Nbd.cc b/src/tools/rbd/action/Nbd.cc new file mode 100644 index 000000000..061fdfa30 --- /dev/null +++ b/src/tools/rbd/action/Nbd.cc @@ -0,0 +1,369 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "tools/rbd/ArgumentTypes.h" +#include "tools/rbd/Shell.h" +#include "tools/rbd/Utils.h" +#include "include/stringify.h" +#include "common/SubProcess.h" +#include <iostream> +#include <boost/algorithm/string.hpp> +#include <boost/algorithm/string/predicate.hpp> +#include <boost/program_options.hpp> + +namespace rbd { +namespace action { +namespace nbd { + +namespace at = argument_types; +namespace po = boost::program_options; + +static int call_nbd_cmd(const po::variables_map &vm, + const std::vector<std::string> &args, + const std::vector<std::string> &ceph_global_init_args) { + #if defined(__FreeBSD__) || defined(_WIN32) + std::cerr << "rbd: nbd device is not supported" << std::endl; + return -EOPNOTSUPP; + #else + char exe_path[PATH_MAX]; + ssize_t exe_path_bytes = readlink("/proc/self/exe", exe_path, + sizeof(exe_path) - 1); + if (exe_path_bytes < 0) { + strcpy(exe_path, "rbd-nbd"); + } else { + if (snprintf(exe_path + exe_path_bytes, + sizeof(exe_path) - exe_path_bytes, + "-nbd") < 0) { + return -EOVERFLOW; + } + } + + SubProcess process(exe_path, SubProcess::KEEP, SubProcess::KEEP, SubProcess::KEEP); + + for (auto &arg : ceph_global_init_args) { + process.add_cmd_arg(arg.c_str()); + } + + for (auto &arg : args) { + process.add_cmd_arg(arg.c_str()); + } + + if (process.spawn()) { + std::cerr << "rbd: failed to run rbd-nbd: " << process.err() << std::endl; + return -EINVAL; + } else if (process.join()) { + std::cerr << "rbd: rbd-nbd failed with error: " << process.err() << std::endl; + return -EINVAL; + } + + return 0; + #endif +} + +int execute_list(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { +#if defined(__FreeBSD__) || defined(_WIN32) + std::cerr << "rbd: nbd device is not supported" << std::endl; + return -EOPNOTSUPP; +#else + std::vector<std::string> args; + + args.push_back("list-mapped"); + + if (vm.count("format")) { + args.push_back("--format"); + args.push_back(vm["format"].as<at::Format>().value); + } + if (vm["pretty-format"].as<bool>()) { + args.push_back("--pretty-format"); + } + + return call_nbd_cmd(vm, args, ceph_global_init_args); +#endif +} + +int execute_attach(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { +#if defined(__FreeBSD__) || defined(_WIN32) + std::cerr << "rbd: nbd device is not supported" << std::endl; + return -EOPNOTSUPP; +#else + std::vector<std::string> args; + std::string device_path; + + args.push_back("attach"); + std::string img; + int r = utils::get_image_or_snap_spec(vm, &img); + if (r < 0) { + return r; + } + args.push_back(img); + + if (vm.count("device")) { + device_path = vm["device"].as<std::string>(); + args.push_back("--device"); + args.push_back(device_path); + } else { + std::cerr << "rbd: device was not specified" << std::endl; + return -EINVAL; + } + + if (vm["show-cookie"].as<bool>()) { + args.push_back("--show-cookie"); + } + + if (vm.count("cookie")) { + args.push_back("--cookie"); + args.push_back(vm["cookie"].as<std::string>()); + } else if (!vm["force"].as<bool>()) { + std::cerr << "rbd: could not validate attach request\n"; + std::cerr << "rbd: mismatching the image and the device may lead to data corruption\n"; + std::cerr << "rbd: must specify --cookie <arg> or --force to proceed" << std::endl; + return -EINVAL; + } + + if (vm["quiesce"].as<bool>()) { + args.push_back("--quiesce"); + } + + if (vm["read-only"].as<bool>()) { + args.push_back("--read-only"); + } + + if (vm["exclusive"].as<bool>()) { + args.push_back("--exclusive"); + } + + if (vm.count("quiesce-hook")) { + args.push_back("--quiesce-hook"); + args.push_back(vm["quiesce-hook"].as<std::string>()); + } + + if (vm.count("options")) { + utils::append_options_as_args(vm["options"].as<std::vector<std::string>>(), + &args); + } + + return call_nbd_cmd(vm, args, ceph_global_init_args); +#endif +} + +int execute_detach(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { +#if defined(__FreeBSD__) || defined(_WIN32) + std::cerr << "rbd: nbd device is not supported" << std::endl; + return -EOPNOTSUPP; +#else + std::string device_name = utils::get_positional_argument(vm, 0); + if (!boost::starts_with(device_name, "/dev/")) { + device_name.clear(); + } + + std::string image_name; + if (device_name.empty()) { + int r = utils::get_image_or_snap_spec(vm, &image_name); + if (r < 0) { + return r; + } + } + + if (device_name.empty() && image_name.empty()) { + std::cerr << "rbd: detach requires either image name or device path" + << std::endl; + return -EINVAL; + } + + std::vector<std::string> args; + + args.push_back("detach"); + args.push_back(device_name.empty() ? image_name : device_name); + + if (vm.count("options")) { + utils::append_options_as_args(vm["options"].as<std::vector<std::string>>(), + &args); + } + + return call_nbd_cmd(vm, args, ceph_global_init_args); +#endif +} + +int execute_map(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { +#if defined(__FreeBSD__) || defined(_WIN32) + std::cerr << "rbd: nbd device is not supported" << std::endl; + return -EOPNOTSUPP; +#else + std::vector<std::string> args; + + args.push_back("map"); + std::string img; + int r = utils::get_image_or_snap_spec(vm, &img); + if (r < 0) { + return r; + } + args.push_back(img); + + if (vm["quiesce"].as<bool>()) { + args.push_back("--quiesce"); + } + + if (vm["show-cookie"].as<bool>()) { + args.push_back("--show-cookie"); + } + + if (vm.count("cookie")) { + args.push_back("--cookie"); + args.push_back(vm["cookie"].as<std::string>()); + } + + if (vm["read-only"].as<bool>()) { + args.push_back("--read-only"); + } + + if (vm["exclusive"].as<bool>()) { + args.push_back("--exclusive"); + } + + if (vm.count("quiesce-hook")) { + args.push_back("--quiesce-hook"); + args.push_back(vm["quiesce-hook"].as<std::string>()); + } + + if (vm.count("options")) { + utils::append_options_as_args(vm["options"].as<std::vector<std::string>>(), + &args); + } + + return call_nbd_cmd(vm, args, ceph_global_init_args); +#endif +} + +int execute_unmap(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_init_args) { +#if defined(__FreeBSD__) || defined(_WIN32) + std::cerr << "rbd: nbd device is not supported" << std::endl; + return -EOPNOTSUPP; +#else + std::string device_name = utils::get_positional_argument(vm, 0); + if (!boost::starts_with(device_name, "/dev/")) { + device_name.clear(); + } + + std::string image_name; + if (device_name.empty()) { + int r = utils::get_image_or_snap_spec(vm, &image_name); + if (r < 0) { + return r; + } + } + + if (device_name.empty() && image_name.empty()) { + std::cerr << "rbd: unmap requires either image name or device path" + << std::endl; + return -EINVAL; + } + + std::vector<std::string> args; + + args.push_back("unmap"); + args.push_back(device_name.empty() ? image_name : device_name); + + if (vm.count("options")) { + utils::append_options_as_args(vm["options"].as<std::vector<std::string>>(), + &args); + } + + return call_nbd_cmd(vm, args, ceph_global_init_args); +#endif +} + +void get_list_arguments_deprecated(po::options_description *positional, + po::options_description *options) { + at::add_format_options(options); +} + +int execute_list_deprecated(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_args) { + std::cerr << "rbd: 'nbd list' command is deprecated, " + << "use 'device list -t nbd' instead" << std::endl; + return execute_list(vm, ceph_global_args); +} + +void get_map_arguments_deprecated(po::options_description *positional, + po::options_description *options) { + at::add_image_or_snap_spec_options(positional, options, + at::ARGUMENT_MODIFIER_NONE); + options->add_options() + ("read-only", po::bool_switch(), "map read-only") + ("exclusive", po::bool_switch(), "forbid writes by other clients") + ("device", po::value<std::string>(), "specify nbd device") + ("nbds_max", po::value<std::string>(), "override module param nbds_max") + ("max_part", po::value<std::string>(), "override module param max_part") + ("timeout", po::value<std::string>(), "set nbd request timeout (seconds)"); +} + +int execute_map_deprecated(const po::variables_map &vm_deprecated, + const std::vector<std::string> &ceph_global_args) { + std::cerr << "rbd: 'nbd map' command is deprecated, " + << "use 'device map -t nbd' instead" << std::endl; + + po::options_description options; + options.add_options() + ("options,o", po::value<std::vector<std::string>>() + ->default_value(std::vector<std::string>(), ""), ""); + + po::variables_map vm = vm_deprecated; + po::store(po::command_line_parser({}).options(options).run(), vm); + + std::vector<std::string> opts; + if (vm_deprecated.count("device")) { + opts.push_back("device=" + vm_deprecated["device"].as<std::string>()); + } + if (vm_deprecated.count("nbds_max")) { + opts.push_back("nbds_max=" + vm_deprecated["nbds_max"].as<std::string>()); + } + if (vm_deprecated.count("max_part")) { + opts.push_back("max_part=" + vm_deprecated["max_part"].as<std::string>()); + } + if (vm_deprecated.count("timeout")) { + opts.push_back("timeout=" + vm_deprecated["timeout"].as<std::string>()); + } + + vm.at("options").value() = boost::any(opts); + + return execute_map(vm, ceph_global_args); +} + +void get_unmap_arguments_deprecated(po::options_description *positional, + po::options_description *options) { + positional->add_options() + ("image-or-snap-or-device-spec", + "image, snapshot, or device specification\n" + "[<pool-name>/]<image-name>[@<snap-name>] or <device-path>"); + at::add_pool_option(options, at::ARGUMENT_MODIFIER_NONE); + at::add_image_option(options, at::ARGUMENT_MODIFIER_NONE); + at::add_snap_option(options, at::ARGUMENT_MODIFIER_NONE); +} + +int execute_unmap_deprecated(const po::variables_map &vm, + const std::vector<std::string> &ceph_global_args) { + std::cerr << "rbd: 'nbd unmap' command is deprecated, " + << "use 'device unmap -t nbd' instead" << std::endl; + return execute_unmap(vm, ceph_global_args); +} + +Shell::Action action_show_deprecated( + {"nbd", "list"}, {"nbd", "ls"}, "List the nbd devices already used.", "", + &get_list_arguments_deprecated, &execute_list_deprecated, false); + +Shell::Action action_map_deprecated( + {"nbd", "map"}, {}, "Map image to a nbd device.", "", + &get_map_arguments_deprecated, &execute_map_deprecated, false); + +Shell::Action action_unmap_deprecated( + {"nbd", "unmap"}, {}, "Unmap a nbd device.", "", + &get_unmap_arguments_deprecated, &execute_unmap_deprecated, false); + +} // namespace nbd +} // namespace action +} // namespace rbd |