/*
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*
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* Copyright 2017, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "dropbox.h"
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#include <cstdio>
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#include <cstdlib>
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#include <memory>
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#include <inttypes.h>
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#include <unistd.h>
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include <android-base/unique_fd.h>
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#include <android/os/DropBoxManager.h>
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#include <binder/Status.h>
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#include <utils/String8.h>
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#include "perfprofd_record.pb.h"
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#include "perfprofd_io.h"
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namespace android {
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namespace perfprofd {
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namespace dropbox {
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namespace {
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bool WriteDropboxFile(android::perfprofd::PerfprofdRecord* encodedProfile,
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const std::string& temp_dir,
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std::string* error_msg) {
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android::base::unique_fd tmp_fd;
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{
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char path[PATH_MAX];
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snprintf(path, sizeof(path), "%s/dropboxtmp-XXXXXX", temp_dir.c_str());
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tmp_fd.reset(mkstemp(path));
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if (tmp_fd.get() == -1) {
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*error_msg = android::base::StringPrintf("Could not create temp file %s: %s",
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path,
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strerror(errno));
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return false;
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}
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if (unlink(path) != 0) {
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PLOG(WARNING) << "Could not unlink binder temp file";
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}
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}
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// Dropbox takes ownership of the fd, and if it is not readonly,
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// a selinux violation will occur. Get a read-only version.
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android::base::unique_fd read_only;
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{
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char fdpath[64];
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snprintf(fdpath, arraysize(fdpath), "/proc/self/fd/%d", tmp_fd.get());
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read_only.reset(open(fdpath, O_RDONLY | O_CLOEXEC));
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if (read_only.get() < 0) {
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*error_msg = android::base::StringPrintf("Could not create read-only fd: %s",
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strerror(errno));
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return false;
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}
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}
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constexpr bool kCompress = true; // Ignore the config here. Dropbox will always end up
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// compressing the data, might as well make the temp
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// file smaller and help it out.
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using DropBoxManager = android::os::DropBoxManager;
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constexpr int kDropboxFlags = DropBoxManager::IS_GZIPPED;
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if (!SerializeProtobuf(encodedProfile, std::move(tmp_fd), kCompress)) {
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*error_msg = "Could not serialize to temp file";
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return false;
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}
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sp<DropBoxManager> dropbox(new DropBoxManager());
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android::binder::Status status = dropbox->addFile(String16("perfprofd"),
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read_only.release(),
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kDropboxFlags);
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if (!status.isOk()) {
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*error_msg = status.toString8();
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return false;
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}
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return true;
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}
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} // namespace
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bool SendToDropbox(android::perfprofd::PerfprofdRecord* profile,
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const std::string& temp_directory,
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std::string* error_msg) {
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size_t size = profile->ByteSize();
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if (size < 1024 * 1024) {
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// For a small size, send as a byte buffer directly.
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std::unique_ptr<uint8_t[]> data(new uint8_t[size]);
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profile->SerializeWithCachedSizesToArray(data.get());
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using DropBoxManager = android::os::DropBoxManager;
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sp<DropBoxManager> dropbox(new DropBoxManager());
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android::binder::Status status = dropbox->addData(String16("perfprofd"),
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data.get(),
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size,
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0);
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if (!status.isOk()) {
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*error_msg = status.toString8();
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return false;
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}
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return true;
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} else {
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// For larger buffers, we need to go through the filesystem.
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return WriteDropboxFile(profile, temp_directory, error_msg);
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}
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}
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} // namespace dropbox
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} // namespace perfprofd
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} // namespace android
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