Adding upstream version 18.2.2.upstream/18.2.2

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

1 files changed, 44 insertions, 0 deletions

diff --git a/src/librbd/crypto/CryptoContextPool.cc b/src/librbd/crypto/CryptoContextPool.cc
new file mode 100644
index 000000000..b303a54ec
--- /dev/null
+++ b/src/librbd/crypto/CryptoContextPool.cc
@@ -0,0 +1,44 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/crypto/CryptoContextPool.h"
+
+namespace librbd {
+namespace crypto {
+
+template <typename T>
+CryptoContextPool<T>::CryptoContextPool(DataCryptor<T>* data_cryptor,
+                                        uint32_t pool_size)
+     : m_data_cryptor(data_cryptor), m_encrypt_contexts(pool_size),
+       m_decrypt_contexts(pool_size) {
+}
+
+template <typename T>
+CryptoContextPool<T>::~CryptoContextPool() {
+  T* ctx;
+  while (m_encrypt_contexts.pop(ctx)) {
+    m_data_cryptor->return_context(ctx, CipherMode::CIPHER_MODE_ENC);
+  }
+  while (m_decrypt_contexts.pop(ctx)) {
+    m_data_cryptor->return_context(ctx, CipherMode::CIPHER_MODE_DEC);
+  }
+}
+
+template <typename T>
+T* CryptoContextPool<T>::get_context(CipherMode mode) {
+  T* ctx;
+  if (!get_contexts(mode).pop(ctx)) {
+    ctx = m_data_cryptor->get_context(mode);
+  }
+  return ctx;
+}
+
+template <typename T>
+void CryptoContextPool<T>::return_context(T* ctx, CipherMode mode) {
+  if (!get_contexts(mode).push(ctx)) {
+    m_data_cryptor->return_context(ctx, mode);
+  }
+}
+
+} // namespace crypto
+} // namespace librbd