--- /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 <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) {
+ 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;
+ }
+
+ 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, 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;
+ }
+
+ 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