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 namespace_name;
  45   std::string image_name;
  46   std::string snap_name;
  47   int r = utils::get_pool_image_snapshot_names(
  48     vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &namespace_name,
  49     &image_name, &snap_name, true, utils::SNAPSHOT_PRESENCE_NONE,
  50     utils::SPEC_VALIDATION_NONE);
  51   if (r < 0) {
  52     return r;
  53   }
  54
  55   librbd::ImageOptions opts;
  56   r = utils::get_journal_options(vm, &opts);
  57   if (r < 0) {
  58     return r;
  59   }
  60
  61   std::vector<std::string> feature_names;
  62   if (vm.count(at::POSITIONAL_ARGUMENTS)) {
  63     const std::vector<std::string> &args =
  64       vm[at::POSITIONAL_ARGUMENTS].as<std::vector<std::string> >();
  65     feature_names.insert(feature_names.end(), args.begin() + arg_index,
  66                          args.end());
  67   }
  68
  69   if (feature_names.empty()) {
  70     std::cerr << "rbd: at least one feature name must be specified"
  71               << std::endl;
  72     return -EINVAL;
  73   }
  74
  75   boost::any features_any(static_cast<uint64_t>(0));
  76   at::ImageFeatures image_features;
  77   at::validate(features_any, feature_names, &image_features, 0);
  78
  79   librados::Rados rados;
  80   librados::IoCtx io_ctx;
  81   librbd::Image image;
  82   r = utils::init_and_open_image(pool_name, namespace_name, image_name, "", "",
  83                                  false, &rados, &io_ctx, &image);
  84   if (r < 0) {
  85     return r;
  86   }
  87
  88   r = image.update_features(boost::any_cast<uint64_t>(features_any), enabled);
  89   if (r < 0) {
  90     std::cerr << "rbd: failed to update image features: " << cpp_strerror(r)
  91               << std::endl;
  92     return r;
  93   }
  94   return 0;
  95 }
  96
  97 int execute_disable(const po::variables_map &vm,
  98                     const std::vector<std::string> &ceph_global_init_args) {
  99   return execute(vm, false);
 100 }
 101
 102 int execute_enable(const po::variables_map &vm,
 103                    const std::vector<std::string> &ceph_global_init_args) {
 104   return execute(vm, true);
 105 }
 106
 107 Shell::Action action_disable(
 108   {"feature", "disable"}, {}, "Disable the specified image feature.", "",
 109   &get_arguments_disable, &execute_disable);
 110 Shell::Action action_enable(
 111   {"feature", "enable"}, {}, "Enable the specified image feature.", "",
 112   &get_arguments_enable, &execute_enable);
 113
 114 } // namespace feature
 115 } // namespace action
 116 } // namespace rbd