From ea2912f187cec8d426cfc2ca715b9a503355fa37 Mon Sep 17 00:00:00 2001 From: xunchang Date: Sun, 17 Mar 2019 16:45:12 -0700 Subject: Create a FuseDataProvider base class The fuse data provider for adb/sdcard shares common code and structures. This cl creates a FuseDataProvider base class and provides implementations for adb and sdcard. In the follow cls, we can kill the provider_vtab struct; and also add another implementation to parse a block map file and provides data. Test: unit tests pass, sideload a package, apply a package from sdcard Change-Id: If8311666a52a2e3c0fbae0ee9688fa6d01e4ad09 --- fuse_sdcard_install.cpp | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 fuse_sdcard_install.cpp (limited to 'fuse_sdcard_install.cpp') diff --git a/fuse_sdcard_install.cpp b/fuse_sdcard_install.cpp new file mode 100644 index 000000000..79ef16bbc --- /dev/null +++ b/fuse_sdcard_install.cpp @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2019 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "fuse_sdcard_install.h" + +#include +#include + +#include + +#include "fuse_provider.h" +#include "fuse_sideload.h" + +bool start_sdcard_fuse(const char* path) { + FuseFileDataProvider file_data_reader(path, 65536); + + if (!file_data_reader) { + return false; + } + + provider_vtab vtab; + vtab.read_block = std::bind(&FuseFileDataProvider::ReadBlockAlignedData, &file_data_reader, + std::placeholders::_2, std::placeholders::_3, std::placeholders::_1); + vtab.close = [&file_data_reader]() { file_data_reader.Close(); }; + + // The installation process expects to find the sdcard unmounted. Unmount it with MNT_DETACH so + // that our open file continues to work but new references see it as unmounted. + umount2("/sdcard", MNT_DETACH); + + return run_fuse_sideload(vtab, file_data_reader.file_size(), + file_data_reader.fuse_block_size()) == 0; +} -- cgit v1.2.3