Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 92 insertions, 0 deletions

diff --git a/src/librbd/LibrbdAdminSocketHook.cc b/src/librbd/LibrbdAdminSocketHook.cc
new file mode 100644
index 000000000..159c9eda5
--- /dev/null
+++ b/src/librbd/LibrbdAdminSocketHook.cc
@@ -0,0 +1,92 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "common/errno.h"
+
+#include "librbd/ImageCtx.h"
+#include "librbd/LibrbdAdminSocketHook.h"
+#include "librbd/internal.h"
+#include "librbd/api/Io.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbdadminsocket: "
+
+namespace librbd {
+
+class LibrbdAdminSocketCommand {
+public:
+  virtual ~LibrbdAdminSocketCommand() {}
+  virtual int call(Formatter *f) = 0;
+};
+
+class FlushCacheCommand : public LibrbdAdminSocketCommand {
+public:
+  explicit FlushCacheCommand(ImageCtx *ictx) : ictx(ictx) {}
+
+  int call(Formatter *f) override {
+    return api::Io<>::flush(*ictx);
+  }
+
+private:
+  ImageCtx *ictx;
+};
+
+struct InvalidateCacheCommand : public LibrbdAdminSocketCommand {
+public:
+  explicit InvalidateCacheCommand(ImageCtx *ictx) : ictx(ictx) {}
+
+  int call(Formatter *f) override {
+    return invalidate_cache(ictx);
+  }
+
+private:
+  ImageCtx *ictx;
+};
+
+LibrbdAdminSocketHook::LibrbdAdminSocketHook(ImageCtx *ictx) :
+  admin_socket(ictx->cct->get_admin_socket()) {
+
+  std::string command;
+  std::string imagename;
+  int r;
+
+  imagename = ictx->md_ctx.get_pool_name() + "/" + ictx->name;
+  command = "rbd cache flush " + imagename;
+
+  r = admin_socket->register_command(command, this,
+				     "flush rbd image " + imagename +
+				     " cache");
+  if (r == 0) {
+    commands[command] = new FlushCacheCommand(ictx);
+  }
+
+  command = "rbd cache invalidate " + imagename;
+  r = admin_socket->register_command(command, this,
+				     "invalidate rbd image " + imagename + 
+				     " cache");
+  if (r == 0) {
+    commands[command] = new InvalidateCacheCommand(ictx);
+  }
+}
+
+LibrbdAdminSocketHook::~LibrbdAdminSocketHook() {
+  (void)admin_socket->unregister_commands(this);
+  for (Commands::const_iterator i = commands.begin(); i != commands.end();
+       ++i) {
+    delete i->second;
+  }
+}
+
+int LibrbdAdminSocketHook::call(std::string_view command,
+				const cmdmap_t& cmdmap,
+				const bufferlist&,
+				Formatter *f,
+				std::ostream& errss,
+				bufferlist& out) {
+  Commands::const_iterator i = commands.find(command);
+  ceph_assert(i != commands.end());
+  return i->second->call(f);
+}
+
+} // namespace librbd