From 17054c051a846743ecbfacec5986fe8b35152c9d Mon Sep 17 00:00:00 2001 From: Tao Bao Date: Thu, 3 May 2018 22:41:23 -0700 Subject: otautil: Rename dir/sys/thermal utils. Test: mmma -j bootable/recovery Change-Id: I32ab98549e91f993364306e4a88dc654221b3869 --- otautil/SysUtil.cpp | 203 ---------------------------------------------------- 1 file changed, 203 deletions(-) delete mode 100644 otautil/SysUtil.cpp (limited to 'otautil/SysUtil.cpp') diff --git a/otautil/SysUtil.cpp b/otautil/SysUtil.cpp deleted file mode 100644 index 48336ad07..000000000 --- a/otautil/SysUtil.cpp +++ /dev/null @@ -1,203 +0,0 @@ -/* - * Copyright 2006 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 "otautil/SysUtil.h" - -#include // TEMP_FAILURE_RETRY -#include -#include // SIZE_MAX -#include -#include -#include - -#include -#include - -#include -#include -#include -#include - -bool MemMapping::MapFD(int fd) { - struct stat sb; - if (fstat(fd, &sb) == -1) { - PLOG(ERROR) << "fstat(" << fd << ") failed"; - return false; - } - - void* memPtr = mmap(nullptr, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0); - if (memPtr == MAP_FAILED) { - PLOG(ERROR) << "mmap(" << sb.st_size << ", R, PRIVATE, " << fd << ", 0) failed"; - return false; - } - - addr = static_cast(memPtr); - length = sb.st_size; - ranges_.clear(); - ranges_.emplace_back(MappedRange{ memPtr, static_cast(sb.st_size) }); - - return true; -} - -// A "block map" which looks like this (from uncrypt/uncrypt.cpp): -// -// /dev/block/platform/msm_sdcc.1/by-name/userdata # block device -// 49652 4096 # file size in bytes, block size -// 3 # count of block ranges -// 1000 1008 # block range 0 -// 2100 2102 # ... block range 1 -// 30 33 # ... block range 2 -// -// Each block range represents a half-open interval; the line "30 33" reprents the blocks -// [30, 31, 32]. -bool MemMapping::MapBlockFile(const std::string& filename) { - std::string content; - if (!android::base::ReadFileToString(filename, &content)) { - PLOG(ERROR) << "Failed to read " << filename; - return false; - } - - std::vector lines = android::base::Split(android::base::Trim(content), "\n"); - if (lines.size() < 4) { - LOG(ERROR) << "Block map file is too short: " << lines.size(); - return false; - } - - size_t size; - size_t blksize; - if (sscanf(lines[1].c_str(), "%zu %zu", &size, &blksize) != 2) { - LOG(ERROR) << "Failed to parse file size and block size: " << lines[1]; - return false; - } - - size_t range_count; - if (sscanf(lines[2].c_str(), "%zu", &range_count) != 1) { - LOG(ERROR) << "Failed to parse block map header: " << lines[2]; - return false; - } - - size_t blocks; - if (blksize != 0) { - blocks = ((size - 1) / blksize) + 1; - } - if (size == 0 || blksize == 0 || blocks > SIZE_MAX / blksize || range_count == 0 || - lines.size() != 3 + range_count) { - LOG(ERROR) << "Invalid data in block map file: size " << size << ", blksize " << blksize - << ", range_count " << range_count << ", lines " << lines.size(); - return false; - } - - // Reserve enough contiguous address space for the whole file. - void* reserve = mmap(nullptr, blocks * blksize, PROT_NONE, MAP_PRIVATE | MAP_ANON, -1, 0); - if (reserve == MAP_FAILED) { - PLOG(ERROR) << "failed to reserve address space"; - return false; - } - - const std::string& block_dev = lines[0]; - android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(block_dev.c_str(), O_RDONLY))); - if (fd == -1) { - PLOG(ERROR) << "failed to open block device " << block_dev; - munmap(reserve, blocks * blksize); - return false; - } - - ranges_.clear(); - - unsigned char* next = static_cast(reserve); - size_t remaining_size = blocks * blksize; - bool success = true; - for (size_t i = 0; i < range_count; ++i) { - const std::string& line = lines[i + 3]; - - size_t start, end; - if (sscanf(line.c_str(), "%zu %zu\n", &start, &end) != 2) { - LOG(ERROR) << "failed to parse range " << i << ": " << line; - success = false; - break; - } - size_t range_size = (end - start) * blksize; - if (end <= start || (end - start) > SIZE_MAX / blksize || range_size > remaining_size) { - LOG(ERROR) << "Invalid range: " << start << " " << end; - success = false; - break; - } - - void* range_start = mmap(next, range_size, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd, - static_cast(start) * blksize); - if (range_start == MAP_FAILED) { - PLOG(ERROR) << "failed to map range " << i << ": " << line; - success = false; - break; - } - ranges_.emplace_back(MappedRange{ range_start, range_size }); - - next += range_size; - remaining_size -= range_size; - } - if (success && remaining_size != 0) { - LOG(ERROR) << "Invalid ranges: remaining_size " << remaining_size; - success = false; - } - if (!success) { - munmap(reserve, blocks * blksize); - return false; - } - - addr = static_cast(reserve); - length = size; - - LOG(INFO) << "mmapped " << range_count << " ranges"; - - return true; -} - -bool MemMapping::MapFile(const std::string& fn) { - if (fn.empty()) { - LOG(ERROR) << "Empty filename"; - return false; - } - - if (fn[0] == '@') { - // Block map file "@/cache/recovery/block.map". - if (!MapBlockFile(fn.substr(1))) { - LOG(ERROR) << "Map of '" << fn << "' failed"; - return false; - } - } else { - // This is a regular file. - android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(fn.c_str(), O_RDONLY))); - if (fd == -1) { - PLOG(ERROR) << "Unable to open '" << fn << "'"; - return false; - } - - if (!MapFD(fd)) { - LOG(ERROR) << "Map of '" << fn << "' failed"; - return false; - } - } - return true; -} - -MemMapping::~MemMapping() { - for (const auto& range : ranges_) { - if (munmap(range.addr, range.length) == -1) { - PLOG(ERROR) << "Failed to munmap(" << range.addr << ", " << range.length << ")"; - } - }; - ranges_.clear(); -} -- cgit v1.2.3