ceph/src/tools/rbd/action/Create.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 "common/errno.h"
   8 #include <iostream>
   9 #include <boost/program_options.hpp>
  10
  11 namespace rbd {
  12 namespace action {
  13 namespace create {
  14
  15 namespace at = argument_types;
  16 namespace po = boost::program_options;
  17
  18 static int do_create(librbd::RBD &rbd, librados::IoCtx& io_ctx,
  19                      const char *imgname, uint64_t size,
  20                      librbd::ImageOptions& opts) {
  21   return rbd.create4(io_ctx, imgname, size, opts);
  22 }
  23
  24 void get_arguments(po::options_description *positional,
  25                    po::options_description *options) {
  26   at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
  27   at::add_create_image_options(options, true);
  28   at::add_size_option(options);
  29 }
  30
  31 int execute(const po::variables_map &vm) {
  32   size_t arg_index = 0;
  33   std::string pool_name;
  34   std::string image_name;
  35   std::string snap_name;
  36   int r = utils::get_pool_image_snapshot_names(
  37     vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &image_name,
  38     &snap_name, utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_FULL);
  39   if (r < 0) {
  40     return r;
  41   }
  42
  43   librbd::ImageOptions opts;
  44   r = utils::get_image_options(vm, true, &opts);
  45   if (r < 0) {
  46     return r;
  47   }
  48
  49   uint64_t size;
  50   r = utils::get_image_size(vm, &size);
  51   if (r < 0) {
  52     return r;
  53   }
  54
  55   librados::Rados rados;
  56   librados::IoCtx io_ctx;
  57   r = utils::init(pool_name, &rados, &io_ctx);
  58   if (r < 0) {
  59     return r;
  60   }
  61
  62   librbd::RBD rbd;
  63   r = do_create(rbd, io_ctx, image_name.c_str(), size, opts);
  64   if (r < 0) {
  65     std::cerr << "rbd: create error: " << cpp_strerror(r) << std::endl;
  66     return r;
  67   }
  68   return 0;
  69 }
  70
  71 Shell::Action action(
  72   {"create"}, {}, "Create an empty image.", at::get_long_features_help(),
  73   &get_arguments, &execute);
  74
  75 } // namespace create
  76 } // namespace action
  77 } // namespace rbd