5 files changed, 220 insertions, 0 deletions
diff --git a/src/compressor/brotli/BrotliCompressor.cc b/src/compressor/brotli/BrotliCompressor.cc
new file mode 100644
index 00000000..27685da3
--- /dev/null
+++ b/src/compressor/brotli/BrotliCompressor.cc
@@ -0,0 +1,95 @@
+#include "brotli/encode.h"
+#include "brotli/decode.h"
+#include "BrotliCompressor.h"
+#include "include/scope_guard.h"
+
+#define MAX_LEN (CEPH_PAGE_SIZE)
+
+int BrotliCompressor::compress(const bufferlist &in, bufferlist &out) 
+{
+  BrotliEncoderState* s = BrotliEncoderCreateInstance(nullptr,
+                                                      nullptr,
+                                                      nullptr);
+  if (!s) {
+    return -1;
+  }
+  auto sg = make_scope_guard([&s] { BrotliEncoderDestroyInstance(s); });
+  BrotliEncoderSetParameter(s, BROTLI_PARAM_QUALITY, (uint32_t)9);
+  BrotliEncoderSetParameter(s, BROTLI_PARAM_LGWIN, 22);
+  for (auto i = in.buffers().begin(); i != in.buffers().end();) {
+    size_t available_in = i->length();
+    size_t max_comp_size = BrotliEncoderMaxCompressedSize(available_in);
+    size_t available_out =  max_comp_size;
+    bufferptr ptr = buffer::create_small_page_aligned(max_comp_size);
+    uint8_t* next_out = (uint8_t*)ptr.c_str();
+    const uint8_t* next_in = (uint8_t*)i->c_str();
+    ++i;
+    BrotliEncoderOperation finish = i != in.buffers().end() ?
+                                         BROTLI_OPERATION_PROCESS :
+                                         BROTLI_OPERATION_FINISH;
+    do {
+      if (!BrotliEncoderCompressStream(s,
+                                       finish,
+                                       &available_in,
+                                       &next_in,
+                                       &available_out,
+                                       &next_out,
+                                       nullptr)) {
+        return -1;
+      }
+      unsigned have = max_comp_size - available_out;
+      out.append(ptr, 0, have);
+    } while (available_out == 0);
+    if (BrotliEncoderIsFinished(s)) {
+      break;
+    }
+  }
+  return 0;
+}
+
+int BrotliCompressor::decompress(bufferlist::const_iterator &p,
+                                 size_t compressed_size,
+                                 bufferlist &out) 
+{
+  BrotliDecoderState* s = BrotliDecoderCreateInstance(nullptr,
+                                                      nullptr,
+                                                      nullptr);
+  if (!s) {
+    return -1;
+  }
+  auto sg = make_scope_guard([&s] { BrotliDecoderDestroyInstance(s); });
+  size_t remaining = std::min<size_t>(p.get_remaining(), compressed_size);
+  while (remaining) {
+    const uint8_t* next_in;
+    size_t len = p.get_ptr_and_advance(remaining, (const char**)&next_in);
+    remaining -= len;
+    size_t available_in = len;
+    BrotliDecoderResult result = BROTLI_DECODER_RESULT_ERROR;
+    do {
+      size_t available_out = MAX_LEN;
+      bufferptr ptr = buffer::create_page_aligned(MAX_LEN);
+      uint8_t* next_out = (uint8_t*)ptr.c_str();
+      result = BrotliDecoderDecompressStream(s,
+                                             &available_in,
+                                             &next_in,
+                                             &available_out,
+                                             &next_out,
+                                             0);
+      if (!result) {
+        return -1;
+      }
+      unsigned have = MAX_LEN - available_out;
+      out.append(ptr, 0, have);
+    } while (result == BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT);
+    if (BrotliDecoderIsFinished(s)) {
+      break;
+    }
+  }
+  return 0;
+}
+
+int BrotliCompressor::decompress(const bufferlist &in, bufferlist &out) 
+{  
+  auto i = std::cbegin(in);
+  return decompress(i, in.length(), out);
+}
diff --git a/src/compressor/brotli/BrotliCompressor.h b/src/compressor/brotli/BrotliCompressor.h
new file mode 100644
index 00000000..482fe5e2
--- /dev/null
+++ b/src/compressor/brotli/BrotliCompressor.h
@@ -0,0 +1,31 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2017 BI SHUN KE <aionshun@livemail.tw>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_BROTLICOMPRESSOR_H
+#define CEPH_BROTLICOMPRESSOR_H
+
+
+#include "include/buffer.h"
+#include "compressor/Compressor.h"
+
+class BrotliCompressor : public Compressor 
+{
+  public:
+  BrotliCompressor() : Compressor(COMP_ALG_BROTLI, "brotli") {}
+  
+  int compress(const bufferlist &in, bufferlist &out) override;
+  int decompress(const bufferlist &in, bufferlist &out) override;
+  int decompress(bufferlist::const_iterator &p, size_t compressed_len, bufferlist &out) override;
+};
+
+#endif //CEPH_BROTLICOMPRESSOR_H
+
diff --git a/src/compressor/brotli/CMakeLists.txt b/src/compressor/brotli/CMakeLists.txt
new file mode 100644
index 00000000..f1992428
--- /dev/null
+++ b/src/compressor/brotli/CMakeLists.txt
@@ -0,0 +1,39 @@
+# brotli
+
+set(brotli_sources 
+  CompressionPluginBrotli.cc
+  BrotliCompressor.cc
+)
+include(ExternalProject)
+ExternalProject_Add(brotli_ext
+  DOWNLOAD_DIR ${CMAKE_BINARY_DIR}/src/
+  GIT_REPOSITORY "https://github.com/google/brotli.git"
+  GIT_TAG "v1.0.7"
+  SOURCE_DIR ${CMAKE_BINARY_DIR}/src/brotli
+  CONFIGURE_COMMAND ./configure-cmake --disable-debug 
+  INSTALL_COMMAND ""
+  BUILD_COMMAND $(MAKE)
+  BUILD_IN_SOURCE 1
+  INSTALL_COMMAND "")
+
+ExternalProject_Add_Step(brotli_ext forcebuild
+  DEPENDEES configure
+  DEPENDERS build
+  COMMAND "true"
+  ALWAYS 1)
+
+set(bortli_libs enc dec common)
+file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/src/brotli/c/include")
+foreach(lib ${bortli_libs})
+  add_library(brotli::${lib} STATIC IMPORTED)
+  add_dependencies(brotli::${lib} brotli_ext)
+  set_target_properties(brotli::${lib} PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_BINARY_DIR}/src/brotli/c/include"
+    IMPORTED_LOCATION "${CMAKE_BINARY_DIR}/src/brotli/libbrotli${lib}-static.a")
+  list(APPEND BROTLI_LIBRARIES brotli::${lib})
+endforeach()
+
+add_library(ceph_brotli SHARED ${brotli_sources})
+list(REVERSE bortli_libs)
+target_link_libraries(ceph_brotli PRIVATE ${BROTLI_LIBRARIES})
+install(TARGETS ceph_brotli DESTINATION ${compressor_plugin_dir})
diff --git a/src/compressor/brotli/CompressionPluginBrotli.cc b/src/compressor/brotli/CompressionPluginBrotli.cc
new file mode 100644
index 00000000..245f49db
--- /dev/null
+++ b/src/compressor/brotli/CompressionPluginBrotli.cc
@@ -0,0 +1,19 @@
+#include "acconfig.h"
+#include "ceph_ver.h"
+#include "CompressionPluginBrotli.h"
+#include "common/ceph_context.h"
+
+
+const char *__ceph_plugin_version()
+{
+  return CEPH_GIT_NICE_VER;
+}
+
+int __ceph_plugin_init(CephContext *cct,
+                       const std::string& type,
+                       const std::string& name)
+{
+  PluginRegistry *instance = cct->get_plugin_registry();
+  return instance->add(type, name, new CompressionPluginBrotli(cct));
+}
+
diff --git a/src/compressor/brotli/CompressionPluginBrotli.h b/src/compressor/brotli/CompressionPluginBrotli.h
new file mode 100644
index 00000000..641a6e1c
--- /dev/null
+++ b/src/compressor/brotli/CompressionPluginBrotli.h
@@ -0,0 +1,36 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2017 BI SHUN KE <aionshun@livemail.tw>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_COMPRESSION_PLUGIN_BROTLI_H
+#define CEPH_COMPRESSION_PLUGIN_BROTLI_H
+
+#include "ceph_ver.h"
+#include "compressor/CompressionPlugin.h"
+#include "BrotliCompressor.h"
+
+class CompressionPluginBrotli : public CompressionPlugin {
+public:
+  explicit CompressionPluginBrotli(CephContext *cct) : CompressionPlugin(cct)
+  {}
+  
+  virtual int factory(CompressorRef *cs, std::ostream *ss)
+  {
+    if (compressor == nullptr) {
+      BrotliCompressor *interface = new BrotliCompressor();
+      compressor = CompressorRef(interface);
+    }
+    *cs = compressor;
+    return 0;
+  }
+};
+
+#endif