--- /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 "include/types.h"
+#include "include/stringify.h"
+#include "common/errno.h"
+#include "common/Formatter.h"
+#include "common/TextTable.h"
+#include <algorithm>
+#include <iostream>
+#include <boost/bind.hpp>
+#include <boost/program_options.hpp>
+
+namespace rbd {
+namespace action {
+namespace disk_usage {
+
+namespace at = argument_types;
+namespace po = boost::program_options;
+
+static int disk_usage_callback(uint64_t offset, size_t len, int exists,
+ void *arg) {
+ uint64_t *used_size = reinterpret_cast<uint64_t *>(arg);
+ if (exists) {
+ (*used_size) += len;
+ }
+ return 0;
+}
+
+static int compute_image_disk_usage(const std::string& name,
+ const std::string& snap_name,
+ const std::string& from_snap_name,
+ librbd::Image &image, uint64_t size,
+ TextTable& tbl, Formatter *f,
+ uint64_t *used_size) {
+ const char* from = NULL;
+ if (!from_snap_name.empty()) {
+ from = from_snap_name.c_str();
+ }
+
+ uint64_t flags;
+ int r = image.get_flags(&flags);
+ if (r < 0) {
+ std::cerr << "rbd: failed to retrieve image flags: " << cpp_strerror(r)
+ << std::endl;
+ return r;
+ }
+ if ((flags & RBD_FLAG_FAST_DIFF_INVALID) != 0) {
+ std::cerr << "warning: fast-diff map is invalid for " << name
+ << (snap_name.empty() ? "" : "@" + snap_name) << ". "
+ << "operation may be slow." << std::endl;
+ }
+
+ *used_size = 0;
+ r = image.diff_iterate2(from, 0, size, false, true,
+ &disk_usage_callback, used_size);
+ if (r < 0) {
+ std::cerr << "rbd: failed to iterate diffs: " << cpp_strerror(r)
+ << std::endl;
+ return r;
+ }
+
+ if (f) {
+ f->open_object_section("image");
+ f->dump_string("name", name);
+ if (!snap_name.empty()) {
+ f->dump_string("snapshot", snap_name);
+ }
+ f->dump_unsigned("provisioned_size", size);
+ f->dump_unsigned("used_size" , *used_size);
+ f->close_section();
+ } else {
+ std::string full_name = name;
+ if (!snap_name.empty()) {
+ full_name += "@" + snap_name;
+ }
+ tbl << full_name
+ << stringify(si_t(size))
+ << stringify(si_t(*used_size))
+ << TextTable::endrow;
+ }
+ return 0;
+}
+
+static int do_disk_usage(librbd::RBD &rbd, librados::IoCtx &io_ctx,
+ const char *imgname, const char *snapname,
+ const char *from_snapname, Formatter *f) {
+ std::vector<std::string> names;
+ int r = rbd.list(io_ctx, names);
+ if (r == -ENOENT) {
+ r = 0;
+ } else if (r < 0) {
+ return r;
+ }
+
+ TextTable tbl;
+ if (f) {
+ f->open_object_section("stats");
+ f->open_array_section("images");
+ } else {
+ tbl.define_column("NAME", TextTable::LEFT, TextTable::LEFT);
+ tbl.define_column("PROVISIONED", TextTable::RIGHT, TextTable::RIGHT);
+ tbl.define_column("USED", TextTable::RIGHT, TextTable::RIGHT);
+ }
+
+ uint32_t count = 0;
+ uint64_t used_size = 0;
+ uint64_t total_prov = 0;
+ uint64_t total_used = 0;
+ bool found = false;
+ std::sort(names.begin(), names.end());
+ for (std::vector<string>::const_iterator name = names.begin();
+ name != names.end(); ++name) {
+ if (imgname != NULL && *name != imgname) {
+ continue;
+ }
+ found = true;
+
+ librbd::Image image;
+ r = rbd.open_read_only(io_ctx, image, name->c_str(), NULL);
+ if (r < 0) {
+ if (r != -ENOENT) {
+ std::cerr << "rbd: error opening " << *name << ": " << cpp_strerror(r)
+ << std::endl;
+ }
+ continue;
+ }
+
+ uint64_t features;
+ int r = image.features(&features);
+ if (r < 0) {
+ std::cerr << "rbd: failed to retrieve image features: " << cpp_strerror(r)
+ << std::endl;
+ goto out;
+ }
+ if ((features & RBD_FEATURE_FAST_DIFF) == 0) {
+ std::cerr << "warning: fast-diff map is not enabled for " << *name << ". "
+ << "operation may be slow." << std::endl;
+ }
+
+ librbd::image_info_t info;
+ if (image.stat(info, sizeof(info)) < 0) {
+ r = -EINVAL;
+ goto out;
+ }
+
+ std::vector<librbd::snap_info_t> snap_list;
+ r = image.snap_list(snap_list);
+ if (r < 0) {
+ std::cerr << "rbd: error opening " << *name << " snapshots: "
+ << cpp_strerror(r) << std::endl;
+ continue;
+ }
+
+ bool found_from_snap = (from_snapname == nullptr);
+ std::string last_snap_name;
+ std::sort(snap_list.begin(), snap_list.end(),
+ boost::bind(&librbd::snap_info_t::id, _1) <
+ boost::bind(&librbd::snap_info_t::id, _2));
+ for (std::vector<librbd::snap_info_t>::const_iterator snap =
+ snap_list.begin(); snap != snap_list.end(); ++snap) {
+ librbd::Image snap_image;
+ r = rbd.open_read_only(io_ctx, snap_image, name->c_str(),
+ snap->name.c_str());
+ if (r < 0) {
+ std::cerr << "rbd: error opening snapshot " << *name << "@"
+ << snap->name << ": " << cpp_strerror(r) << std::endl;
+ goto out;
+ }
+
+ if (imgname == nullptr || found_from_snap ||
+ (found_from_snap && snapname != nullptr && snap->name == snapname)) {
+ r = compute_image_disk_usage(*name, snap->name, last_snap_name,
+ snap_image, snap->size, tbl, f,
+ &used_size);
+ if (r < 0) {
+ goto out;
+ }
+
+ if (snapname != NULL) {
+ total_prov += snap->size;
+ }
+ total_used += used_size;
+ ++count;
+ }
+
+ if (!found_from_snap && from_snapname != nullptr &&
+ snap->name == from_snapname) {
+ found_from_snap = true;
+ }
+ if (snapname != nullptr && snap->name == snapname) {
+ break;
+ }
+ last_snap_name = snap->name;
+ }
+
+ if (snapname == NULL) {
+ r = compute_image_disk_usage(*name, "", last_snap_name, image, info.size,
+ tbl, f, &used_size);
+ if (r < 0) {
+ goto out;
+ }
+ total_prov += info.size;
+ total_used += used_size;
+ ++count;
+ }
+ }
+ if (!found) {
+ std::cerr << "specified image " << imgname << " is not found." << std::endl;
+ return -ENOENT;
+ }
+
+out:
+ if (f) {
+ f->close_section();
+ if (imgname == NULL) {
+ f->dump_unsigned("total_provisioned_size", total_prov);
+ f->dump_unsigned("total_used_size", total_used);
+ }
+ f->close_section();
+ f->flush(std::cout);
+ } else {
+ if (count > 1) {
+ tbl << "<TOTAL>"
+ << stringify(si_t(total_prov))
+ << stringify(si_t(total_used))
+ << TextTable::endrow;
+ }
+ std::cout << tbl;
+ }
+
+ return r < 0 ? r : 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_format_options(options);
+ options->add_options()
+ (at::FROM_SNAPSHOT_NAME.c_str(), po::value<std::string>(),
+ "snapshot starting point");
+}
+
+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_PERMITTED,
+ utils::SPEC_VALIDATION_NONE, vm.count(at::FROM_SNAPSHOT_NAME));
+ if (r < 0) {
+ return r;
+ }
+
+ std::string from_snap_name;
+ if (vm.count(at::FROM_SNAPSHOT_NAME)) {
+ from_snap_name = vm[at::FROM_SNAPSHOT_NAME].as<std::string>();
+ }
+
+ at::Format::Formatter formatter;
+ r = utils::get_formatter(vm, &formatter);
+ if (r < 0) {
+ return r;
+ }
+
+ librados::Rados rados;
+ librados::IoCtx io_ctx;
+ r = utils::init(pool_name, &rados, &io_ctx);
+ if (r < 0) {
+ return r;
+ }
+
+ librbd::RBD rbd;
+ r = do_disk_usage(rbd, io_ctx,
+ image_name.empty() ? nullptr: image_name.c_str() ,
+ snap_name.empty() ? nullptr : snap_name.c_str(),
+ from_snap_name.empty() ? nullptr : from_snap_name.c_str(),
+ formatter.get());
+ if (r < 0) {
+ std::cerr << "rbd: du failed: " << cpp_strerror(r) << std::endl;
+ return r;
+ }
+ return 0;
+}
+
+Shell::Action action(
+ {"disk-usage"}, {"du"}, "Show disk usage stats for pool, image or snapshot",
+ "", &get_arguments, &execute);
+
+} // namespace disk_usage
+} // namespace action
+} // namespace rbd
Code Review / stor4nfv.git / blobdiff