ceph/src/tools/rbd/action/Rename.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 rename {
  14
  15 namespace at = argument_types;
  16 namespace po = boost::program_options;
  17
  18 static int do_rename(librbd::RBD &rbd, librados::IoCtx& io_ctx,
  19                      const char *imgname, const char *destname)
  20 {
  21   int r = rbd.rename(io_ctx, imgname, destname);
  22   if (r < 0)
  23     return r;
  24   return 0;
  25 }
  26
  27 void get_arguments(po::options_description *positional,
  28                    po::options_description *options) {
  29   at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_SOURCE);
  30   at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_DEST);
  31 }
  32
  33 int execute(const po::variables_map &vm,
  34             const std::vector<std::string> &ceph_global_init_args) {
  35   size_t arg_index = 0;
  36   std::string pool_name;
  37   std::string namespace_name;
  38   std::string image_name;
  39   std::string snap_name;
  40   int r = utils::get_pool_image_snapshot_names(
  41     vm, at::ARGUMENT_MODIFIER_SOURCE, &arg_index, &pool_name, &namespace_name,
  42     &image_name, &snap_name, true, utils::SNAPSHOT_PRESENCE_NONE,
  43     utils::SPEC_VALIDATION_NONE);
  44   if (r < 0) {
  45     return r;
  46   }
  47
  48   std::string dst_image_name;
  49   std::string dst_snap_name;
  50   std::string dst_pool_name = pool_name;
  51   std::string dst_namespace_name = namespace_name;
  52   r = utils::get_pool_image_snapshot_names(
  53     vm, at::ARGUMENT_MODIFIER_DEST, &arg_index, &dst_pool_name,
  54     &dst_namespace_name, &dst_image_name, &dst_snap_name, true,
  55     utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_FULL);
  56   if (r < 0) {
  57     return r;
  58   }
  59
  60   if (pool_name != dst_pool_name) {
  61     std::cerr << "rbd: mv/rename across pools not supported" << std::endl
  62               << "source pool: " << pool_name << " dest pool: " << dst_pool_name
  63               << std::endl;
  64     return -EINVAL;
  65   } else if (namespace_name != dst_namespace_name) {
  66     std::cerr << "rbd: mv/rename across namespaces not supported" << std::endl
  67               << "source namespace: " << namespace_name << " dest namespace: "
  68               << dst_namespace_name << std::endl;
  69     return -EINVAL;
  70   }
  71
  72   librados::Rados rados;
  73   librados::IoCtx io_ctx;
  74   r = utils::init(pool_name, namespace_name, &rados, &io_ctx);
  75   if (r < 0) {
  76     return r;
  77   }
  78
  79   librbd::RBD rbd;
  80   r = do_rename(rbd, io_ctx, image_name.c_str(), dst_image_name.c_str());
  81   if (r < 0) {
  82     std::cerr << "rbd: rename error: " << cpp_strerror(r) << std::endl;
  83     return r;
  84   }
  85   return 0;
  86 }
  87
  88 Shell::Action action(
  89   {"rename"}, {"mv"}, "Rename image within pool.", "", &get_arguments,
  90   &execute);
  91
  92 } // namespace rename
  93 } // namespace action
  94 } // namespace rbd