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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 "common/Formatter.h"
#include <iostream>
#include <boost/program_options.hpp>
namespace rbd {
namespace action {
namespace children {
namespace at = argument_types;
namespace po = boost::program_options;
int do_list_children(librados::IoCtx &io_ctx, librbd::Image &image,
bool all_flag, bool descendants_flag, Formatter *f)
{
std::vector<librbd::linked_image_spec_t> children;
librbd::RBD rbd;
int r;
if (descendants_flag) {
r = image.list_descendants(&children);
} else {
r = image.list_children3(&children);
}
if (r < 0)
return r;
if (f)
f->open_array_section("children");
for (auto& child : children) {
bool trash = child.trash;
if (f) {
if (all_flag) {
f->open_object_section("child");
f->dump_string("pool", child.pool_name);
f->dump_string("pool_namespace", child.pool_namespace);
f->dump_string("image", child.image_name);
f->dump_string("id", child.image_id);
f->dump_bool("trash", child.trash);
f->close_section();
} else if (!trash) {
f->open_object_section("child");
f->dump_string("pool", child.pool_name);
f->dump_string("pool_namespace", child.pool_namespace);
f->dump_string("image", child.image_name);
f->close_section();
}
} else if (all_flag || !trash) {
if (child.pool_name.empty()) {
std::cout << "(child missing " << child.pool_id << "/";
} else {
std::cout << child.pool_name << "/";
}
if (!child.pool_namespace.empty()) {
std::cout << child.pool_namespace << "/";
}
if (child.image_name.empty()) {
std::cout << child.image_id << ")";
} else {
std::cout << child.image_name;
if (trash) {
std::cout << " (trash " << child.image_id << ")";
}
}
std::cout << std::endl;
}
}
if (f) {
f->close_section();
f->flush(std::cout);
}
return 0;
}
void get_arguments(po::options_description *positional,
po::options_description *options) {
at::add_image_or_snap_spec_options(positional, options,
at::ARGUMENT_MODIFIER_NONE);
at::add_snap_id_option(options);
options->add_options()
("all,a", po::bool_switch(), "list all children (include trash)");
options->add_options()
("descendants", po::bool_switch(), "include all descendants");
at::add_format_options(options);
}
int execute(const po::variables_map &vm,
const std::vector<std::string> &ceph_global_init_args) {
uint64_t snap_id = LIBRADOS_SNAP_HEAD;
if (vm.count(at::SNAPSHOT_ID)) {
snap_id = vm[at::SNAPSHOT_ID].as<uint64_t>();
}
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_PERMITTED,
utils::SPEC_VALIDATION_NONE);
if (r < 0) {
return r;
}
if (snap_id != LIBRADOS_SNAP_HEAD && !snap_name.empty()) {
std::cerr << "rbd: trying to access snapshot using both name and id."
<< std::endl;
return -EINVAL;
}
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, namespace_name, image_name, "", "",
true, &rados, &io_ctx, &image);
if (r < 0) {
return r;
}
if (!snap_name.empty()) {
r = image.snap_set(snap_name.c_str());
} else if (snap_id != LIBRADOS_SNAP_HEAD) {
r = image.snap_set_by_id(snap_id);
}
if (r == -ENOENT) {
std::cerr << "rbd: snapshot does not exist." << std::endl;
return r;
} else if (r < 0) {
std::cerr << "rbd: error setting snapshot: " << cpp_strerror(r)
<< std::endl;
return r;
}
r = do_list_children(io_ctx, image, vm["all"].as<bool>(),
vm["descendants"].as<bool>(), formatter.get());
if (r < 0) {
std::cerr << "rbd: listing children failed: " << cpp_strerror(r)
<< std::endl;
return r;
}
return 0;
}
Shell::SwitchArguments switched_arguments({"all", "a", "descendants"});
Shell::Action action(
{"children"}, {}, "Display children of an image or its snapshot.", "",
&get_arguments, &execute);
} // namespace children
} // namespace action
} // namespace rbd
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