X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Ftools%2Frbd%2Faction%2FNbd.cc;fp=src%2Fceph%2Fsrc%2Ftools%2Frbd%2Faction%2FNbd.cc;h=d612fef1930ced4e6c0c3e5671d82f338fa434b1;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git diff --git a/src/ceph/src/tools/rbd/action/Nbd.cc b/src/ceph/src/tools/rbd/action/Nbd.cc new file mode 100644 index 0000000..d612fef --- /dev/null +++ b/src/ceph/src/tools/rbd/action/Nbd.cc @@ -0,0 +1,201 @@ +// -*- 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 +#include +#include +#include + +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 &args) +{ + 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); + + if (vm.count("conf")) { + process.add_cmd_arg("--conf"); + process.add_cmd_arg(vm["conf"].as().c_str()); + } + if (vm.count("cluster")) { + process.add_cmd_arg("--cluster"); + process.add_cmd_arg(vm["cluster"].as().c_str()); + } + if (vm.count("id")) { + process.add_cmd_arg("--id"); + process.add_cmd_arg(vm["id"].as().c_str()); + } + if (vm.count("name")) { + process.add_cmd_arg("--name"); + process.add_cmd_arg(vm["name"].as().c_str()); + } + if (vm.count("mon_host")) { + process.add_cmd_arg("--mon_host"); + process.add_cmd_arg(vm["mon_host"].as().c_str()); + } + if (vm.count("keyfile")) { + process.add_cmd_arg("--keyfile"); + process.add_cmd_arg(vm["keyfile"].as().c_str()); + } + if (vm.count("keyring")) { + process.add_cmd_arg("--keyring"); + process.add_cmd_arg(vm["keyring"].as().c_str()); + } + + for (std::vector::const_iterator p = args.begin(); + p != args.end(); ++p) + process.add_cmd_arg(*p); + + 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; +} + +void get_show_arguments(po::options_description *positional, + po::options_description *options) +{ } + +int execute_show(const po::variables_map &vm) +{ + std::vector args; + + args.push_back("list-mapped"); + + return call_nbd_cmd(vm, args); +} + +void get_map_arguments(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(), "specify nbd device") + ("nbds_max", po::value(), "override module param nbds_max") + ("max_part", po::value(), "override module param max_part"); +} + +int execute_map(const po::variables_map &vm) +{ + size_t arg_index = 0; + std::string pool_name; + std::string image_name; + std::string snap_name; + int r = utils::get_pool_image_snapshot_names( + vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &image_name, + &snap_name, utils::SNAPSHOT_PRESENCE_PERMITTED, + utils::SPEC_VALIDATION_NONE); + if (r < 0) { + return r; + } + + std::vector args; + + args.push_back("map"); + std::string img; + img.append(pool_name); + img.append("/"); + img.append(image_name); + if (!snap_name.empty()) { + img.append("@"); + img.append(snap_name); + } + args.push_back(img.c_str()); + + if (vm["read-only"].as()) + args.push_back("--read-only"); + + if (vm["exclusive"].as()) + args.push_back("--exclusive"); + + if (vm.count("device")) { + args.push_back("--device"); + args.push_back(vm["device"].as().c_str()); + } + if (vm.count("nbds_max")) { + args.push_back("--nbds_max"); + args.push_back(vm["nbds_max"].as().c_str()); + } + if (vm.count("max_part")) { + args.push_back("--max_part"); + args.push_back(vm["max_part"].as().c_str()); + } + + return call_nbd_cmd(vm, args); +} + +void get_unmap_arguments(po::options_description *positional, + po::options_description *options) +{ + positional->add_options() + ("device-spec", "specify nbd device"); +} + +int execute_unmap(const po::variables_map &vm) +{ + std::string device_name = utils::get_positional_argument(vm, 0); + if (!boost::starts_with(device_name, "/dev/")) { + device_name.clear(); + } + + if (device_name.empty()) { + std::cerr << "rbd: nbd unmap requires device path" << std::endl; + return -EINVAL; + } + + std::vector args; + + args.push_back("unmap"); + args.push_back(device_name.c_str()); + + return call_nbd_cmd(vm, args); +} + +Shell::SwitchArguments switched_arguments({"read-only"}); + +Shell::Action action_show( + {"nbd", "list"}, {"nbd", "ls"}, "List the nbd devices already used.", "", + &get_show_arguments, &execute_show); + +Shell::Action action_map( + {"nbd", "map"}, {}, "Map image to a nbd device.", "", + &get_map_arguments, &execute_map); + +Shell::Action action_unmap( + {"nbd", "unmap"}, {}, "Unmap a nbd device.", "", + &get_unmap_arguments, &execute_unmap); + +} // namespace nbd +} // namespace action +} // namespace rbd