X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Ftools%2Frbd%2Faction%2FSnap.cc;fp=src%2Fceph%2Fsrc%2Ftools%2Frbd%2Faction%2FSnap.cc;h=2513cebd8210ae6c8553c51e29c1b0c1c45f56ce;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/tools/rbd/action/Snap.cc b/src/ceph/src/tools/rbd/action/Snap.cc
new file mode 100644
index 0000000..2513ceb
--- /dev/null
+++ b/src/ceph/src/tools/rbd/action/Snap.cc
@@ -0,0 +1,771 @@
+// -*- 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 <iostream>
+#include <boost/program_options.hpp>
+
+namespace rbd {
+namespace action {
+namespace snap {
+
+namespace at = argument_types;
+namespace po = boost::program_options;
+
+int do_list_snaps(librbd::Image& image, Formatter *f)
+{
+  std::vector<librbd::snap_info_t> snaps;
+  TextTable t;
+  int r;
+
+  r = image.snap_list(snaps);
+  if (r < 0)
+    return r;
+
+  if (f) {
+    f->open_array_section("snapshots");
+  } else {
+    t.define_column("SNAPID", TextTable::RIGHT, TextTable::RIGHT);
+    t.define_column("NAME", TextTable::LEFT, TextTable::LEFT);
+    t.define_column("SIZE", TextTable::RIGHT, TextTable::RIGHT);
+    t.define_column("TIMESTAMP", TextTable::LEFT, TextTable::LEFT);
+  }
+
+  for (std::vector<librbd::snap_info_t>::iterator s = snaps.begin();
+       s != snaps.end(); ++s) {
+    struct timespec timestamp;
+    image.snap_get_timestamp(s->id, &timestamp);
+    string tt_str = "";
+    if(timestamp.tv_sec != 0) {
+      time_t tt = timestamp.tv_sec;
+      tt_str = ctime(&tt);
+      tt_str = tt_str.substr(0, tt_str.length() - 1);  
+    }
+
+    if (f) {
+      f->open_object_section("snapshot");
+      f->dump_unsigned("id", s->id);
+      f->dump_string("name", s->name);
+      f->dump_unsigned("size", s->size);
+      f->dump_string("timestamp", tt_str);
+      f->close_section();
+    } else {
+      t << s->id << s->name << stringify(prettybyte_t(s->size)) << tt_str
+        << TextTable::endrow;
+    }
+  }
+
+  if (f) {
+    f->close_section();
+    f->flush(std::cout);
+  } else if (snaps.size()) {
+    std::cout << t;
+  }
+
+  return 0;
+}
+
+int do_add_snap(librbd::Image& image, const char *snapname)
+{
+  int r = image.snap_create(snapname);
+  if (r < 0)
+    return r;
+
+  return 0;
+}
+
+int do_remove_snap(librbd::Image& image, const char *snapname, bool force,
+		   bool no_progress)
+{
+  uint32_t flags = force? RBD_SNAP_REMOVE_FORCE : 0;
+  int r = 0;
+  utils::ProgressContext pc("Removing snap", no_progress);
+  
+  r = image.snap_remove2(snapname, flags, pc);
+  if (r < 0) {
+    pc.fail();
+    return r;
+  }
+
+  pc.finish();
+  return 0;
+}
+
+int do_rollback_snap(librbd::Image& image, const char *snapname,
+                     bool no_progress)
+{
+  utils::ProgressContext pc("Rolling back to snapshot", no_progress);
+  int r = image.snap_rollback_with_progress(snapname, pc);
+  if (r < 0) {
+    pc.fail();
+    return r;
+  }
+  pc.finish();
+  return 0;
+}
+
+int do_purge_snaps(librbd::Image& image, bool no_progress)
+{
+  utils::ProgressContext pc("Removing all snapshots", no_progress);
+  std::vector<librbd::snap_info_t> snaps;
+  bool is_protected = false;
+  int r = image.snap_list(snaps);
+  if (r < 0) {
+    pc.fail();
+    return r;
+  } else if (0 == snaps.size()) {
+    return 0;
+  } else {
+    for (size_t i = 0; i < snaps.size(); ++i) {
+      r = image.snap_is_protected(snaps[i].name.c_str(), &is_protected);
+      if (r < 0) {
+        pc.fail();
+        return r;
+      } else if (is_protected == true) {
+        pc.fail();
+        std::cerr << "\r" << "rbd: snapshot '" << snaps[i].name.c_str()
+                  << "' is protected from removal." << std::endl;
+        return -EBUSY;
+      }
+    }
+    for (size_t i = 0; i < snaps.size(); ++i) {
+      r = image.snap_remove(snaps[i].name.c_str());
+      if (r < 0) {
+        pc.fail();
+        return r;
+      }
+      pc.update_progress(i + 1, snaps.size());
+    }
+
+    pc.finish();
+    return 0;
+  }
+}
+
+int do_protect_snap(librbd::Image& image, const char *snapname)
+{
+  int r = image.snap_protect(snapname);
+  if (r < 0)
+    return r;
+
+  return 0;
+}
+
+int do_unprotect_snap(librbd::Image& image, const char *snapname)
+{
+  int r = image.snap_unprotect(snapname);
+  if (r < 0)
+    return r;
+
+  return 0;
+}
+
+int do_set_limit(librbd::Image& image, uint64_t limit)
+{
+  return image.snap_set_limit(limit);
+}
+
+int do_clear_limit(librbd::Image& image)
+{
+  return image.snap_set_limit(UINT64_MAX);
+}
+
+void get_list_arguments(po::options_description *positional,
+                        po::options_description *options) {
+  at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+  at::add_image_id_option(options);
+  at::add_format_options(options);
+}
+
+int execute_list(const po::variables_map &vm) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string image_name;
+  std::string snap_name;
+  std::string image_id;
+
+  if (vm.count(at::IMAGE_ID)) {
+    image_id = vm[at::IMAGE_ID].as<std::string>();
+  }
+
+  bool has_image_spec = utils::check_if_image_spec_present(
+      vm, at::ARGUMENT_MODIFIER_NONE, arg_index);
+
+  if (!image_id.empty() && has_image_spec) {
+    std::cerr << "rbd: trying to access image using both name and id. "
+              << std::endl;
+    return -EINVAL;
+  }
+
+  int r;
+  if (image_id.empty()) {
+    r = utils::get_pool_image_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                             &arg_index, &pool_name,
+                                             &image_name, &snap_name,
+                                             utils::SNAPSHOT_PRESENCE_NONE,
+                                             utils::SPEC_VALIDATION_NONE);
+  } else {
+    r = utils::get_pool_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                       &arg_index, &pool_name, &snap_name,
+                                       utils::SNAPSHOT_PRESENCE_NONE,
+                                       utils::SPEC_VALIDATION_NONE);
+  }
+  if (r < 0) {
+    return r;
+  }
+
+  at::Format::Formatter formatter;
+  r = utils::get_formatter(vm, &formatter);
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init_and_open_image(pool_name, image_name, image_id, "", true,
+                                 &rados, &io_ctx, &image);
+  if (r < 0) {
+    return r;
+  }
+
+  r = do_list_snaps(image, formatter.get());
+  if (r < 0) {
+    cerr << "rbd: failed to list snapshots: " << cpp_strerror(r)
+         << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+void get_create_arguments(po::options_description *positional,
+                          po::options_description *options) {
+  at::add_snap_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+}
+
+int execute_create(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_REQUIRED, utils::SPEC_VALIDATION_SNAP);
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init_and_open_image(pool_name, image_name, "", "", false, &rados,
+                                 &io_ctx, &image);
+  if (r < 0) {
+    return r;
+  }
+
+  r = do_add_snap(image, snap_name.c_str());
+  if (r < 0) {
+    cerr << "rbd: failed to create snapshot: " << cpp_strerror(r)
+         << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+void get_remove_arguments(po::options_description *positional,
+                          po::options_description *options) {
+  at::add_snap_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+  at::add_no_progress_option(options);
+  at::add_image_id_option(options);
+
+  options->add_options()
+    ("force", po::bool_switch(), "flatten children and unprotect snapshot if needed.");
+}
+
+int execute_remove(const po::variables_map &vm) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string image_name;
+  std::string snap_name;
+  std::string image_id;
+  bool force = vm["force"].as<bool>();
+
+  if (vm.count(at::IMAGE_ID)) {
+    image_id = vm[at::IMAGE_ID].as<std::string>();
+  }
+
+  bool has_image_spec = utils::check_if_image_spec_present(
+      vm, at::ARGUMENT_MODIFIER_NONE, arg_index);
+
+  if (!image_id.empty() && has_image_spec) {
+    std::cerr << "rbd: trying to access image using both name and id. "
+              << std::endl;
+    return -EINVAL;
+  }
+
+  int r;
+  if (image_id.empty()) {
+    r = utils::get_pool_image_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                             &arg_index, &pool_name,
+                                             &image_name, &snap_name,
+                                             utils::SNAPSHOT_PRESENCE_REQUIRED,
+                                             utils::SPEC_VALIDATION_NONE);
+  } else {
+    r = utils::get_pool_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                       &arg_index, &pool_name, &snap_name,
+                                       utils::SNAPSHOT_PRESENCE_REQUIRED,
+                                       utils::SPEC_VALIDATION_NONE);
+  }
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init(pool_name, &rados, &io_ctx);
+  if (r < 0) {
+    return r;
+  }
+
+  io_ctx.set_osdmap_full_try();
+  if (image_id.empty()) {
+    r = utils::open_image(io_ctx, image_name, false, &image);
+  } else {
+    r = utils::open_image_by_id(io_ctx, image_id, false, &image);
+  }
+  if (r < 0) {
+    return r;
+  }
+
+  r = do_remove_snap(image, snap_name.c_str(), force, vm[at::NO_PROGRESS].as<bool>());
+  if (r < 0) {
+    if (r == -EBUSY) {
+      std::cerr << "rbd: snapshot '" << snap_name << "' "
+                << "is protected from removal." << std::endl;
+    } else {
+      std::cerr << "rbd: failed to remove snapshot: " << cpp_strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+  return 0;
+}
+
+void get_purge_arguments(po::options_description *positional,
+                         po::options_description *options) {
+  at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+  at::add_image_id_option(options);
+  at::add_no_progress_option(options);
+}
+
+int execute_purge(const po::variables_map &vm) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string image_name;
+  std::string snap_name;
+  std::string image_id;
+
+  if (vm.count(at::IMAGE_ID)) {
+    image_id = vm[at::IMAGE_ID].as<std::string>();
+  }
+
+  bool has_image_spec = utils::check_if_image_spec_present(
+      vm, at::ARGUMENT_MODIFIER_NONE, arg_index);
+
+  if (!image_id.empty() && has_image_spec) {
+    std::cerr << "rbd: trying to access image using both name and id. "
+              << std::endl;
+    return -EINVAL;
+  }
+
+  int r;
+  if (image_id.empty()) {
+    r = utils::get_pool_image_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                             &arg_index, &pool_name,
+                                             &image_name, &snap_name,
+                                             utils::SNAPSHOT_PRESENCE_NONE,
+                                             utils::SPEC_VALIDATION_NONE);
+  } else {
+    r = utils::get_pool_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                       &arg_index, &pool_name, &snap_name,
+                                       utils::SNAPSHOT_PRESENCE_NONE,
+                                       utils::SPEC_VALIDATION_NONE);
+  }
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init(pool_name, &rados, &io_ctx);
+  if (r < 0) {
+    return r;
+  }
+
+  io_ctx.set_osdmap_full_try();
+  if (image_id.empty()) {
+    r = utils::open_image(io_ctx, image_name, false, &image);
+  } else {
+    r = utils::open_image_by_id(io_ctx, image_id, false, &image);
+  }
+  if (r < 0) {
+    return r;
+  }
+
+  r = do_purge_snaps(image, vm[at::NO_PROGRESS].as<bool>());
+  if (r < 0) {
+    if (r != -EBUSY) {
+      std::cerr << "rbd: removing snaps failed: " << cpp_strerror(r)
+                << std::endl;
+    }
+    return r;
+  }
+  return 0;
+}
+
+void get_rollback_arguments(po::options_description *positional,
+                            po::options_description *options) {
+  at::add_snap_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+  at::add_no_progress_option(options);
+}
+
+int execute_rollback(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_REQUIRED, utils::SPEC_VALIDATION_NONE);
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init_and_open_image(pool_name, image_name, "", "", false, &rados,
+                                 &io_ctx, &image);
+  if (r < 0) {
+    return r;
+  }
+
+  r = do_rollback_snap(image, snap_name.c_str(),
+                       vm[at::NO_PROGRESS].as<bool>());
+  if (r < 0) {
+    std::cerr << "rbd: rollback failed: " << cpp_strerror(r) << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+void get_protect_arguments(po::options_description *positional,
+                           po::options_description *options) {
+  at::add_snap_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+}
+
+int execute_protect(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_REQUIRED, utils::SPEC_VALIDATION_NONE);
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init_and_open_image(pool_name, image_name, "", "", false, &rados,
+                                 &io_ctx, &image);
+  if (r < 0) {
+    return r;
+  }
+
+  bool is_protected = false;
+  r = image.snap_is_protected(snap_name.c_str(), &is_protected);
+  if (r < 0) {
+    std::cerr << "rbd: protecting snap failed: " << cpp_strerror(r)
+              << std::endl;
+    return r;
+  } else if (is_protected) {
+    std::cerr << "rbd: snap is already protected" << std::endl;
+    return -EBUSY;
+  }
+
+  r = do_protect_snap(image, snap_name.c_str());
+  if (r < 0) {
+    std::cerr << "rbd: protecting snap failed: " << cpp_strerror(r)
+              << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+void get_unprotect_arguments(po::options_description *positional,
+                             po::options_description *options) {
+  at::add_snap_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
+  at::add_image_id_option(options);
+}
+
+int execute_unprotect(const po::variables_map &vm) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string image_name;
+  std::string snap_name;
+  std::string image_id;
+
+  if (vm.count(at::IMAGE_ID)) {
+    image_id = vm[at::IMAGE_ID].as<std::string>();
+  }
+
+  bool has_image_spec = utils::check_if_image_spec_present(
+      vm, at::ARGUMENT_MODIFIER_NONE, arg_index);
+
+  if (!image_id.empty() && has_image_spec) {
+    std::cerr << "rbd: trying to access image using both name and id. "
+              << std::endl;
+    return -EINVAL;
+  }
+
+  int r;
+  if (image_id.empty()) {
+    r = utils::get_pool_image_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                             &arg_index, &pool_name,
+                                             &image_name, &snap_name,
+                                             utils::SNAPSHOT_PRESENCE_REQUIRED,
+                                             utils::SPEC_VALIDATION_NONE);
+  } else {
+    r = utils::get_pool_snapshot_names(vm, at::ARGUMENT_MODIFIER_NONE,
+                                       &arg_index, &pool_name, &snap_name,
+                                       utils::SNAPSHOT_PRESENCE_REQUIRED,
+                                       utils::SPEC_VALIDATION_NONE);
+  }
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init(pool_name, &rados, &io_ctx);
+  if (r < 0) {
+    return r;
+  }
+
+  io_ctx.set_osdmap_full_try();
+  if (image_id.empty()) {
+    r = utils::open_image(io_ctx, image_name, false, &image);
+  } else {
+    r = utils::open_image_by_id(io_ctx, image_id, false, &image);
+  }
+  if (r < 0) {
+    return r;
+  }
+
+  bool is_protected = false;
+  r = image.snap_is_protected(snap_name.c_str(), &is_protected);
+  if (r < 0) {
+    std::cerr << "rbd: unprotecting snap failed: " << cpp_strerror(r)
+              << std::endl;
+    return r;
+  } else if (!is_protected) {
+    std::cerr << "rbd: snap is already unprotected" << std::endl;
+    return -EINVAL;
+  }
+
+  r = do_unprotect_snap(image, snap_name.c_str());
+  if (r < 0) {
+    std::cerr << "rbd: unprotecting snap failed: " << cpp_strerror(r)
+              << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+void get_set_limit_arguments(po::options_description *pos,
+			     po::options_description *opt) {
+  at::add_image_spec_options(pos, opt, at::ARGUMENT_MODIFIER_NONE);
+  at::add_limit_option(opt);
+}
+
+int execute_set_limit(const po::variables_map &vm) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string image_name;
+  std::string snap_name;
+  uint64_t limit;
+
+  int r = utils::get_pool_image_snapshot_names(
+    vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &image_name,
+    &snap_name, utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_NONE);
+  if (r < 0) {
+    return r;
+  }
+
+  if (vm.count(at::LIMIT)) {
+    limit = vm[at::LIMIT].as<uint64_t>();
+  } else {
+    std::cerr << "rbd: must specify --limit <num>" << std::endl;
+    return -ERANGE;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init_and_open_image(pool_name, image_name, "", "", false, &rados,
+				 &io_ctx, &image);
+  if (r < 0) {
+      return r;
+  }
+
+  r = do_set_limit(image, limit);
+  if (r < 0) {
+    std::cerr << "rbd: setting snapshot limit failed: " << cpp_strerror(r)
+	      << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+void get_clear_limit_arguments(po::options_description *pos,
+			       po::options_description *opt) {
+  at::add_image_spec_options(pos, opt, at::ARGUMENT_MODIFIER_NONE);
+}
+
+int execute_clear_limit(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_NONE, utils::SPEC_VALIDATION_NONE);
+  if (r < 0) {
+    return r;
+  }
+
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init_and_open_image(pool_name, image_name, "", "", false, &rados,
+				 &io_ctx, &image);
+  if (r < 0) {
+      return r;
+  }
+
+  r = do_clear_limit(image);
+  if (r < 0) {
+    std::cerr << "rbd: clearing snapshot limit failed: " << cpp_strerror(r)
+	      << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+void get_rename_arguments(po::options_description *positional,
+                          po::options_description *options) {
+  at::add_snap_spec_options(positional, options, at::ARGUMENT_MODIFIER_SOURCE);
+  at::add_snap_spec_options(positional, options, at::ARGUMENT_MODIFIER_DEST);
+}
+
+int execute_rename(const po::variables_map &vm) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string image_name;
+  std::string src_snap_name;
+  int r = utils::get_pool_image_snapshot_names(
+    vm, at::ARGUMENT_MODIFIER_SOURCE, &arg_index, &pool_name, &image_name,
+    &src_snap_name, utils::SNAPSHOT_PRESENCE_REQUIRED,
+    utils::SPEC_VALIDATION_NONE);
+  if (r < 0) {
+    return -r;
+  }
+
+  std::string dest_pool_name(pool_name);
+  std::string dest_image_name;
+  std::string dest_snap_name;
+  r = utils::get_pool_image_snapshot_names(
+    vm, at::ARGUMENT_MODIFIER_DEST, &arg_index, &dest_pool_name,
+    &dest_image_name, &dest_snap_name, utils::SNAPSHOT_PRESENCE_REQUIRED,
+    utils::SPEC_VALIDATION_SNAP);
+  if (r < 0) {
+    return -r;
+  }
+
+  if (pool_name != dest_pool_name) {
+    std::cerr << "rbd: source and destination pool must be the same"
+              << std::endl;
+    return -EINVAL;
+  } else if (image_name != dest_image_name) {
+    std::cerr << "rbd: source and destination image name must be the same"
+              << std::endl;
+    return -EINVAL;
+  }
+  
+  librados::Rados rados;
+  librados::IoCtx io_ctx;
+  librbd::Image image;
+  r = utils::init_and_open_image(pool_name, image_name, "", "", false, &rados,
+                                 &io_ctx, &image);
+  if (r < 0) {
+    return r;
+  }
+
+  r = image.snap_rename(src_snap_name.c_str(), dest_snap_name.c_str());
+  if (r < 0) {
+    std::cerr << "rbd: renaming snap failed: " << cpp_strerror(r)
+              << std::endl;
+    return r;
+  }
+  return 0;
+}
+
+Shell::Action action_list(
+  {"snap", "list"}, {"snap", "ls"}, "Dump list of image snapshots.", "",
+  &get_list_arguments, &execute_list);
+Shell::Action action_create(
+  {"snap", "create"}, {"snap", "add"}, "Create a snapshot.", "",
+  &get_create_arguments, &execute_create);
+Shell::Action action_remove(
+  {"snap", "remove"}, {"snap", "rm"}, "Delete a snapshot.", "",
+  &get_remove_arguments, &execute_remove);
+Shell::Action action_purge(
+  {"snap", "purge"}, {}, "Delete all snapshots.", "",
+  &get_purge_arguments, &execute_purge);
+Shell::Action action_rollback(
+  {"snap", "rollback"}, {"snap", "revert"}, "Rollback image to snapshot.", "",
+  &get_rollback_arguments, &execute_rollback);
+Shell::Action action_protect(
+  {"snap", "protect"}, {}, "Prevent a snapshot from being deleted.", "",
+  &get_protect_arguments, &execute_protect);
+Shell::Action action_unprotect(
+  {"snap", "unprotect"}, {}, "Allow a snapshot to be deleted.", "",
+  &get_unprotect_arguments, &execute_unprotect);
+Shell::Action action_set_limit(
+  {"snap", "limit", "set"}, {}, "Limit the number of snapshots.", "",
+  &get_set_limit_arguments, &execute_set_limit);
+Shell::Action action_clear_limit(
+  {"snap", "limit", "clear"}, {}, "Remove snapshot limit.", "",
+  &get_clear_limit_arguments, &execute_clear_limit);
+Shell::Action action_rename(
+  {"snap", "rename"}, {}, "Rename a snapshot.", "",
+  &get_rename_arguments, &execute_rename);
+
+} // namespace snap
+} // namespace action
+} // namespace rbd