From 22f11205a1f0d534c10e88e40f09b92c9faa161c Mon Sep 17 00:00:00 2001
From: Tianjie Xu <xunchang@google.com>
Date: Mon, 27 Aug 2018 10:50:31 -0700
Subject: Remove otafault

Now it's less beneficial to inject I/O faults since we don't see many of
them. Remove the library that mocks I/O failures. And switch to android::base
I/O when possible.

Bug: 113032079
Test: unit tests pass
Change-Id: I9f2a92b7ba80f4da6ff9e2abc27f2680138f942c
---
 otafault/ota_io.cpp | 212 ----------------------------------------------------
 1 file changed, 212 deletions(-)
 delete mode 100644 otafault/ota_io.cpp

(limited to 'otafault/ota_io.cpp')

diff --git a/otafault/ota_io.cpp b/otafault/ota_io.cpp
deleted file mode 100644
index 63ef18e26..000000000
--- a/otafault/ota_io.cpp
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * Copyright (C) 2015 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 "otafault/ota_io.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <map>
-#include <mutex>
-#include <string>
-
-#include <android-base/thread_annotations.h>
-
-#include "otafault/config.h"
-
-static std::mutex filename_mutex;
-static std::map<intptr_t, const char*> filename_cache GUARDED_BY(filename_mutex);
-static std::string read_fault_file_name = "";
-static std::string write_fault_file_name = "";
-static std::string fsync_fault_file_name = "";
-
-static bool get_hit_file(const char* cached_path, const std::string& ffn) {
-    return should_hit_cache()
-        ? !strncmp(cached_path, OTAIO_CACHE_FNAME, strlen(cached_path))
-        : !strncmp(cached_path, ffn.c_str(), strlen(cached_path));
-}
-
-void ota_set_fault_files() {
-    if (should_fault_inject(OTAIO_READ)) {
-        read_fault_file_name = fault_fname(OTAIO_READ);
-    }
-    if (should_fault_inject(OTAIO_WRITE)) {
-        write_fault_file_name = fault_fname(OTAIO_WRITE);
-    }
-    if (should_fault_inject(OTAIO_FSYNC)) {
-        fsync_fault_file_name = fault_fname(OTAIO_FSYNC);
-    }
-}
-
-bool have_eio_error = false;
-
-int ota_open(const char* path, int oflags) {
-    // Let the caller handle errors; we do not care if open succeeds or fails
-    int fd = open(path, oflags);
-    std::lock_guard<std::mutex> lock(filename_mutex);
-    filename_cache[fd] = path;
-    return fd;
-}
-
-int ota_open(const char* path, int oflags, mode_t mode) {
-    int fd = open(path, oflags, mode);
-    std::lock_guard<std::mutex> lock(filename_mutex);
-    filename_cache[fd] = path;
-    return fd;
-}
-
-FILE* ota_fopen(const char* path, const char* mode) {
-    FILE* fh = fopen(path, mode);
-    std::lock_guard<std::mutex> lock(filename_mutex);
-    filename_cache[(intptr_t)fh] = path;
-    return fh;
-}
-
-static int __ota_close(int fd) {
-    // descriptors can be reused, so make sure not to leave them in the cache
-    std::lock_guard<std::mutex> lock(filename_mutex);
-    filename_cache.erase(fd);
-    return close(fd);
-}
-
-void OtaCloser::Close(int fd) {
-    __ota_close(fd);
-}
-
-int ota_close(unique_fd& fd) {
-    return __ota_close(fd.release());
-}
-
-static int __ota_fclose(FILE* fh) {
-    std::lock_guard<std::mutex> lock(filename_mutex);
-    filename_cache.erase(reinterpret_cast<intptr_t>(fh));
-    return fclose(fh);
-}
-
-void OtaFcloser::operator()(FILE* f) const {
-    __ota_fclose(f);
-};
-
-int ota_fclose(unique_file& fh) {
-  return __ota_fclose(fh.release());
-}
-
-size_t ota_fread(void* ptr, size_t size, size_t nitems, FILE* stream) {
-    if (should_fault_inject(OTAIO_READ)) {
-        std::lock_guard<std::mutex> lock(filename_mutex);
-        auto cached = filename_cache.find((intptr_t)stream);
-        const char* cached_path = cached->second;
-        if (cached != filename_cache.end() &&
-                get_hit_file(cached_path, read_fault_file_name)) {
-            read_fault_file_name = "";
-            errno = EIO;
-            have_eio_error = true;
-            return 0;
-        }
-    }
-    size_t status = fread(ptr, size, nitems, stream);
-    // If I/O error occurs, set the retry-update flag.
-    if (status != nitems && errno == EIO) {
-        have_eio_error = true;
-    }
-    return status;
-}
-
-ssize_t ota_read(int fd, void* buf, size_t nbyte) {
-    if (should_fault_inject(OTAIO_READ)) {
-        std::lock_guard<std::mutex> lock(filename_mutex);
-        auto cached = filename_cache.find(fd);
-        const char* cached_path = cached->second;
-        if (cached != filename_cache.end()
-                && get_hit_file(cached_path, read_fault_file_name)) {
-            read_fault_file_name = "";
-            errno = EIO;
-            have_eio_error = true;
-            return -1;
-        }
-    }
-    ssize_t status = read(fd, buf, nbyte);
-    if (status == -1 && errno == EIO) {
-        have_eio_error = true;
-    }
-    return status;
-}
-
-size_t ota_fwrite(const void* ptr, size_t size, size_t count, FILE* stream) {
-    if (should_fault_inject(OTAIO_WRITE)) {
-        std::lock_guard<std::mutex> lock(filename_mutex);
-        auto cached = filename_cache.find((intptr_t)stream);
-        const char* cached_path = cached->second;
-        if (cached != filename_cache.end() &&
-                get_hit_file(cached_path, write_fault_file_name)) {
-            write_fault_file_name = "";
-            errno = EIO;
-            have_eio_error = true;
-            return 0;
-        }
-    }
-    size_t status = fwrite(ptr, size, count, stream);
-    if (status != count && errno == EIO) {
-        have_eio_error = true;
-    }
-    return status;
-}
-
-ssize_t ota_write(int fd, const void* buf, size_t nbyte) {
-    if (should_fault_inject(OTAIO_WRITE)) {
-        std::lock_guard<std::mutex> lock(filename_mutex);
-        auto cached = filename_cache.find(fd);
-        const char* cached_path = cached->second;
-        if (cached != filename_cache.end() &&
-                get_hit_file(cached_path, write_fault_file_name)) {
-            write_fault_file_name = "";
-            errno = EIO;
-            have_eio_error = true;
-            return -1;
-        }
-    }
-    ssize_t status = write(fd, buf, nbyte);
-    if (status == -1 && errno == EIO) {
-        have_eio_error = true;
-    }
-    return status;
-}
-
-int ota_fsync(int fd) {
-    if (should_fault_inject(OTAIO_FSYNC)) {
-        std::lock_guard<std::mutex> lock(filename_mutex);
-        auto cached = filename_cache.find(fd);
-        const char* cached_path = cached->second;
-        if (cached != filename_cache.end() &&
-                get_hit_file(cached_path, fsync_fault_file_name)) {
-            fsync_fault_file_name = "";
-            errno = EIO;
-            have_eio_error = true;
-            return -1;
-        }
-    }
-    int status = fsync(fd);
-    if (status == -1 && errno == EIO) {
-        have_eio_error = true;
-    }
-    return status;
-}
-
-- 
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