1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "tools/rbd/ArgumentTypes.h"
5 #include "tools/rbd/Shell.h"
6 #include "tools/rbd/Utils.h"
7 #include "common/errno.h"
9 #include <boost/program_options.hpp>
15 namespace at = argument_types;
16 namespace po = boost::program_options;
18 static int do_resize(librbd::Image& image, uint64_t size, bool allow_shrink, bool no_progress)
20 utils::ProgressContext pc("Resizing image", no_progress);
21 int r = image.resize2(size, allow_shrink, pc);
30 void get_arguments(po::options_description *positional,
31 po::options_description *options) {
32 at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
33 at::add_size_option(options);
34 options->add_options()
35 ("allow-shrink", po::bool_switch(), "permit shrinking");
36 at::add_no_progress_option(options);
39 int execute(const po::variables_map &vm) {
41 std::string pool_name;
42 std::string image_name;
43 std::string snap_name;
44 int r = utils::get_pool_image_snapshot_names(
45 vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &image_name,
46 &snap_name, utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_NONE);
52 r = utils::get_image_size(vm, &size);
57 librados::Rados rados;
58 librados::IoCtx io_ctx;
60 r = utils::init_and_open_image(pool_name, image_name, "", snap_name, false,
61 &rados, &io_ctx, &image);
66 librbd::image_info_t info;
67 r = image.stat(info, sizeof(info));
69 std::cerr << "rbd: resize error: " << cpp_strerror(r) << std::endl;
73 r = do_resize(image, size, vm["allow-shrink"].as<bool>(), vm[at::NO_PROGRESS].as<bool>());
75 if (r == -EINVAL && !vm["allow-shrink"].as<bool>()) {
76 std::cerr << "rbd: shrinking an image is only allowed with the "
77 << "--allow-shrink flag" << std::endl;
80 std::cerr << "rbd: resize error: " << cpp_strerror(r) << std::endl;
86 Shell::SwitchArguments switched_arguments({"allow-shrink"});
88 {"resize"}, {}, "Resize (expand or shrink) image.", "", &get_arguments,