1 files changed, 122 insertions, 0 deletions
diff --git a/src/tools/rbd/action/PersistentCache.cc b/src/tools/rbd/action/PersistentCache.cc
new file mode 100644
index 000000000..949006b82
--- /dev/null
+++ b/src/tools/rbd/action/PersistentCache.cc
@@ -0,0 +1,122 @@
+// -*- 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/rbd_types.h"
+#include "include/stringify.h"
+#include "common/errno.h"
+#include "common/Formatter.h"
+#include <iostream>
+#include <boost/program_options.hpp>
+
+namespace rbd {
+namespace action {
+namespace persistent_cache {
+
+namespace at = argument_types;
+namespace po = boost::program_options;
+
+void get_arguments_invalidate(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);
+}
+
+int execute_invalidate(const po::variables_map &vm,
+                       const std::vector<std::string> &ceph_global_init_args) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string namespace_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, &namespace_name,
+    &image_name, &snap_name, true, 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, namespace_name, image_name, "", "",
+                                 false, &rados, &io_ctx, &image);
+  if (r < 0) {
+    return r;
+  }
+
+  r = image.invalidate_cache();
+  if (r < 0) {
+    std::cerr << "rbd: invalidating persistent cache failed: "
+              << cpp_strerror(r) << std::endl;
+    return r;
+  }
+
+  return 0;
+}
+
+void get_arguments_flush(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);
+}
+
+int execute_flush(const po::variables_map &vm,
+                  const std::vector<std::string> &ceph_global_init_args) {
+  size_t arg_index = 0;
+  std::string pool_name;
+  std::string namespace_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, &namespace_name,
+    &image_name, &snap_name, true, 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, namespace_name, image_name, "", "",
+                                 false, &rados, &io_ctx, &image);
+  if (r < 0) {
+    return r;
+  }
+
+  uint64_t features;
+  r = image.features(&features);
+  if (r < 0) {
+    return r;
+  }
+
+  if (features & RBD_FEATURE_DIRTY_CACHE) {
+    r = image.flush();
+    if (r < 0) {
+      std::cerr << "rbd: flushing persistent cache failed: "
+                << cpp_strerror(r) << std::endl;
+      return r;
+    }
+  } else {
+    std::cout << "rbd: persistent cache is clean or disabled" << std::endl;
+  }
+
+  return 0;
+}
+
+Shell::Action action_invalidate(
+  {"persistent-cache", "invalidate"}, {},
+  "Invalidate (discard) existing / dirty persistent cache.", "",
+  &get_arguments_invalidate, &execute_invalidate);
+Shell::Action action_flush(
+  {"persistent-cache", "flush"}, {}, "Flush persistent cache.", "",
+  &get_arguments_flush, &execute_flush);
+
+} // namespace persistent_cache
+} // namespace action
+} // namespace rbd