src/ceph/src/tools/rbd/action/Feature.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "tools/rbd/ArgumentTypes.h"
   5 #include "tools/rbd/Shell.h"
   6 #include "tools/rbd/Utils.h"
   7 #include "include/stringify.h"
   8 #include "common/errno.h"
   9 #include <iostream>
  10 #include <map>
  11 #include <boost/program_options.hpp>
  12
  13 namespace rbd {
  14 namespace action {
  15 namespace feature {
  16
  17 namespace at = argument_types;
  18 namespace po = boost::program_options;
  19
  20 void get_arguments(po::options_description *positional,
  21                    po::options_description *options, bool enabled) {
  22   at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
  23   positional->add_options()
  24     ("features", po::value<at::ImageFeatures>()->multitoken(),
  25      ("image features\n" + at::get_short_features_help(false)).c_str());
  26   if (enabled) {
  27     at::add_create_journal_options(options);
  28   }
  29 }
  30
  31 void get_arguments_disable(po::options_description *positional,
  32                            po::options_description *options) {
  33   get_arguments(positional, options, false);
  34 }
  35
  36 void get_arguments_enable(po::options_description *positional,
  37                           po::options_description *options) {
  38   get_arguments(positional, options, true);
  39 }
  40
  41 int execute(const po::variables_map &vm, bool enabled) {
  42   size_t arg_index = 0;
  43   std::string pool_name;
  44   std::string image_name;
  45   std::string snap_name;
  46   int r = utils::get_pool_image_snapshot_names(
  47     vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &image_name,
  48     &snap_name, utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_NONE);
  49   if (r < 0) {
  50     return r;
  51   }
  52
  53   librbd::ImageOptions opts;
  54   r = utils::get_journal_options(vm, &opts);
  55   if (r < 0) {
  56     return r;
  57   }
  58
  59   std::vector<std::string> feature_names;
  60   if (vm.count(at::POSITIONAL_ARGUMENTS)) {
  61     const std::vector<std::string> &args =
  62       vm[at::POSITIONAL_ARGUMENTS].as<std::vector<std::string> >();
  63     feature_names.insert(feature_names.end(), args.begin() + arg_index,
  64                          args.end());
  65   }
  66
  67   if (feature_names.empty()) {
  68     std::cerr << "rbd: at least one feature name must be specified"
  69               << std::endl;
  70     return -EINVAL;
  71   }
  72
  73   boost::any features_any(static_cast<uint64_t>(0));
  74   at::ImageFeatures image_features;
  75   at::validate(features_any, feature_names, &image_features, 0);
  76
  77   librados::Rados rados;
  78   librados::IoCtx io_ctx;
  79   librbd::Image image;
  80   r = utils::init_and_open_image(pool_name, image_name, "", "", false,
  81                                  &rados, &io_ctx, &image);
  82   if (r < 0) {
  83     return r;
  84   }
  85
  86   r = image.update_features(boost::any_cast<uint64_t>(features_any), enabled);
  87   if (r < 0) {
  88     std::cerr << "rbd: failed to update image features: " << cpp_strerror(r)
  89               << std::endl;
  90     return r;
  91   }
  92   return 0;
  93 }
  94
  95 int execute_disable(const po::variables_map &vm) {
  96   return execute(vm, false);
  97 }
  98
  99 int execute_enable(const po::variables_map &vm) {
 100   return execute(vm, true);
 101 }
 102
 103 Shell::Action action_disable(
 104   {"feature", "disable"}, {}, "Disable the specified image feature.", "",
 105   &get_arguments_disable, &execute_disable);
 106 Shell::Action action_enable(
 107   {"feature", "enable"}, {}, "Enable the specified image feature.", "",
 108   &get_arguments_enable, &execute_enable);
 109
 110 } // namespace feature
 111 } // namespace action
 112 } // namespace rbd