From ea2912f187cec8d426cfc2ca715b9a503355fa37 Mon Sep 17 00:00:00 2001
From: xunchang <xunchang@google.com>
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_provider.cpp | 83 ------------------------------------------------
 1 file changed, 83 deletions(-)
 delete mode 100644 fuse_sdcard_provider.cpp

(limited to 'fuse_sdcard_provider.cpp')

diff --git a/fuse_sdcard_provider.cpp b/fuse_sdcard_provider.cpp
deleted file mode 100644
index 46bdf1774..000000000
--- a/fuse_sdcard_provider.cpp
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright (C) 2014 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_provider.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include <functional>
-
-#include <android-base/file.h>
-
-#include "fuse_sideload.h"
-
-struct file_data {
-  int fd;  // the underlying sdcard file
-
-  uint64_t file_size;
-  uint32_t block_size;
-};
-
-static int read_block_file(const file_data& fd, uint32_t block, uint8_t* buffer,
-                           uint32_t fetch_size) {
-  off64_t offset = static_cast<off64_t>(block) * fd.block_size;
-  if (TEMP_FAILURE_RETRY(lseek64(fd.fd, offset, SEEK_SET)) == -1) {
-    fprintf(stderr, "seek on sdcard failed: %s\n", strerror(errno));
-    return -EIO;
-  }
-
-  if (!android::base::ReadFully(fd.fd, buffer, fetch_size)) {
-    fprintf(stderr, "read on sdcard failed: %s\n", strerror(errno));
-    return -EIO;
-  }
-
-  return 0;
-}
-
-bool start_sdcard_fuse(const char* path) {
-  struct stat sb;
-  if (stat(path, &sb) == -1) {
-    fprintf(stderr, "failed to stat %s: %s\n", path, strerror(errno));
-    return false;
-  }
-
-  file_data fd;
-  fd.fd = open(path, O_RDONLY);
-  if (fd.fd == -1) {
-    fprintf(stderr, "failed to open %s: %s\n", path, strerror(errno));
-    return false;
-  }
-  fd.file_size = sb.st_size;
-  fd.block_size = 65536;
-
-  provider_vtab vtab;
-  vtab.read_block = std::bind(&read_block_file, fd, std::placeholders::_1, std::placeholders::_2,
-                              std::placeholders::_3);
-  vtab.close = [&fd]() { close(fd.fd); };
-
-  // 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, fd.file_size, fd.block_size) == 0;
-}
-- 
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