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// -*- 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 <iostream>
#include <boost/program_options.hpp>
namespace rbd {
namespace action {
namespace resize {
namespace at = argument_types;
namespace po = boost::program_options;
static int do_resize(librbd::Image& image, uint64_t size, bool allow_shrink, bool no_progress)
{
utils::ProgressContext pc("Resizing image", no_progress);
int r = image.resize2(size, allow_shrink, pc);
if (r < 0) {
pc.fail();
return r;
}
pc.finish();
return 0;
}
void get_arguments(po::options_description *positional,
po::options_description *options) {
at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
at::add_size_option(options);
options->add_options()
("allow-shrink", po::bool_switch(), "permit shrinking");
at::add_no_progress_option(options);
}
int 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;
std::string snap_name;
int r = utils::get_pool_image_snapshot_names(
vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
&image_name, &snap_name, true, utils::SNAPSHOT_PRESENCE_NONE,
utils::SPEC_VALIDATION_NONE);
if (r < 0) {
return r;
}
uint64_t size;
r = utils::get_image_size(vm, &size);
if (r < 0) {
return r;
}
librados::Rados rados;
librados::IoCtx io_ctx;
librbd::Image image;
r = utils::init_and_open_image(pool_name, namespace_name, image_name, "",
snap_name, false, &rados, &io_ctx, &image);
if (r < 0) {
return r;
}
librbd::image_info_t info;
r = image.stat(info, sizeof(info));
if (r < 0) {
std::cerr << "rbd: resize error: " << cpp_strerror(r) << std::endl;
return r;
}
if (info.size == size) {
std::cerr << "rbd: new size is equal to original size " << std::endl;
return -EINVAL;
}
if (info.size > size && !vm["allow-shrink"].as<bool>()) {
r = -EINVAL;
} else {
r = do_resize(image, size, vm["allow-shrink"].as<bool>(), vm[at::NO_PROGRESS].as<bool>());
}
if (r < 0) {
if (r == -EINVAL && !vm["allow-shrink"].as<bool>()) {
std::cerr << "rbd: shrinking an image is only allowed with the "
<< "--allow-shrink flag" << std::endl;
return r;
}
std::cerr << "rbd: resize error: " << cpp_strerror(r) << std::endl;
return r;
}
return 0;
}
Shell::SwitchArguments switched_arguments({"allow-shrink"});
Shell::Action action(
{"resize"}, {}, "Resize (expand or shrink) image.", "", &get_arguments,
&execute);
} // namespace resize
} // namespace action
} // namespace rbd
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