+++ /dev/null
-// -*- 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 "common/errno.h"
-#include "common/Formatter.h"
-#include "common/TextTable.h"
-#include <iostream>
-#include <boost/program_options.hpp>
-
-namespace rbd {
-namespace action {
-namespace lock {
-
-namespace at = argument_types;
-namespace po = boost::program_options;
-
-namespace {
-
-void add_id_option(po::options_description *positional) {
- positional->add_options()
- ("lock-id", "unique lock id");
-}
-
-int get_id(const po::variables_map &vm, std::string *id) {
- *id = utils::get_positional_argument(vm, 1);
- if (id->empty()) {
- std::cerr << "rbd: lock id was not specified" << std::endl;
- return -EINVAL;
- }
- return 0;
-}
-
-} // anonymous namespace
-
-static int do_lock_list(librbd::Image& image, Formatter *f)
-{
- std::list<librbd::locker_t> lockers;
- bool exclusive;
- std::string tag;
- TextTable tbl;
- int r;
-
- r = image.list_lockers(&lockers, &exclusive, &tag);
- if (r < 0)
- return r;
-
- if (f) {
- f->open_object_section("locks");
- } else {
- tbl.define_column("Locker", TextTable::LEFT, TextTable::LEFT);
- tbl.define_column("ID", TextTable::LEFT, TextTable::LEFT);
- tbl.define_column("Address", TextTable::LEFT, TextTable::LEFT);
- }
-
- if (lockers.size()) {
- bool one = (lockers.size() == 1);
-
- if (!f) {
- std::cout << "There " << (one ? "is " : "are ") << lockers.size()
- << (exclusive ? " exclusive" : " shared")
- << " lock" << (one ? "" : "s") << " on this image.\n";
- if (!exclusive)
- std::cout << "Lock tag: " << tag << "\n";
- }
-
- for (std::list<librbd::locker_t>::const_iterator it = lockers.begin();
- it != lockers.end(); ++it) {
- if (f) {
- f->open_object_section(it->cookie.c_str());
- f->dump_string("locker", it->client);
- f->dump_string("address", it->address);
- f->close_section();
- } else {
- tbl << it->client << it->cookie << it->address << TextTable::endrow;
- }
- }
- if (!f)
- std::cout << tbl;
- }
-
- if (f) {
- f->close_section();
- f->flush(std::cout);
- }
- return 0;
-}
-
-static int do_lock_add(librbd::Image& image, const char *cookie,
- const char *tag)
-{
- if (tag)
- return image.lock_shared(cookie, tag);
- else
- return image.lock_exclusive(cookie);
-}
-
-static int do_lock_remove(librbd::Image& image, const char *client,
- const char *cookie)
-{
- return image.break_lock(client, cookie);
-}
-
-void get_list_arguments(po::options_description *positional,
- po::options_description *options) {
- at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
- at::add_format_options(options);
-}
-
-int execute_list(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_NONE, utils::SPEC_VALIDATION_NONE);
- if (r < 0) {
- return r;
- }
-
- at::Format::Formatter formatter;
- r = utils::get_formatter(vm, &formatter);
- if (r < 0) {
- return r;
- }
-
- librados::Rados rados;
- librados::IoCtx io_ctx;
- librbd::Image image;
- r = utils::init_and_open_image(pool_name, image_name, "", "", true,
- &rados, &io_ctx, &image);
- if (r < 0) {
- return r;
- }
-
- r = do_lock_list(image, formatter.get());
- if (r < 0) {
- std::cerr << "rbd: listing locks failed: " << cpp_strerror(r) << std::endl;
- return r;
- }
- return 0;
-}
-
-void get_add_arguments(po::options_description *positional,
- po::options_description *options) {
- at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
- add_id_option(positional);
- options->add_options()
- ("shared", po::value<std::string>(), "shared lock tag");
-}
-
-int execute_add(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_NONE, utils::SPEC_VALIDATION_NONE);
- if (r < 0) {
- return r;
- }
-
- std::string lock_cookie;
- r = get_id(vm, &lock_cookie);
- if (r < 0) {
- return r;
- }
-
- std::string lock_tag;
- if (vm.count("shared")) {
- lock_tag = vm["shared"].as<std::string>();
- }
-
- librados::Rados rados;
- librados::IoCtx io_ctx;
- librbd::Image image;
- r = utils::init_and_open_image(pool_name, image_name, "", "", false,
- &rados, &io_ctx, &image);
- if (r < 0) {
- return r;
- }
-
- r = do_lock_add(image, lock_cookie.c_str(),
- lock_tag.empty() ? nullptr : lock_tag.c_str());
- if (r < 0) {
- if (r == -EBUSY || r == -EEXIST) {
- if (!lock_tag.empty()) {
- std::cerr << "rbd: lock is already held by someone else"
- << " with a different tag" << std::endl;
- } else {
- std::cerr << "rbd: lock is already held by someone else" << std::endl;
- }
- } else {
- std::cerr << "rbd: taking lock failed: " << cpp_strerror(r) << std::endl;
- }
- return r;
- }
- return 0;
-}
-
-void get_remove_arguments(po::options_description *positional,
- po::options_description *options) {
- at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
- add_id_option(positional);
- positional->add_options()
- ("locker", "locker client");
-}
-
-int execute_remove(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_NONE, utils::SPEC_VALIDATION_NONE);
- if (r < 0) {
- return r;
- }
-
- std::string lock_cookie;
- r = get_id(vm, &lock_cookie);
- if (r < 0) {
- return r;
- }
-
- std::string lock_client = utils::get_positional_argument(vm, 2);
- if (lock_client.empty()) {
- std::cerr << "rbd: locker was not specified" << std::endl;
- return -EINVAL;
- }
-
- librados::Rados rados;
- librados::IoCtx io_ctx;
- librbd::Image image;
- r = utils::init_and_open_image(pool_name, image_name, "", "", false,
- &rados, &io_ctx, &image);
- if (r < 0) {
- return r;
- }
-
- r = do_lock_remove(image, lock_client.c_str(), lock_cookie.c_str());
- if (r < 0) {
- std::cerr << "rbd: releasing lock failed: " << cpp_strerror(r) << std::endl;
- return r;
- }
- return 0;
-}
-
-Shell::Action action_list(
- {"lock", "list"}, {"lock", "ls"}, "Show locks held on an image.", "",
- &get_list_arguments, &execute_list);
-Shell::Action action_add(
- {"lock", "add"}, {}, "Take a lock on an image.", "",
- &get_add_arguments, &execute_add);
-Shell::Action action_remove(
- {"lock", "remove"}, {"lock", "rm"}, "Release a lock on an image.", "",
- &get_remove_arguments, &execute_remove);
-
-} // namespace lock
-} // namespace action
-} // namespace rbd
Code Review / stor4nfv.git / blobdiff