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/*
*
* Copyright 2017, 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 "dropbox.h"
#include <cstdio>
#include <cstdlib>
#include <memory>
#include <inttypes.h>
#include <unistd.h>
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/unique_fd.h>
#include <android/os/DropBoxManager.h>
#include <binder/Status.h>
#include <utils/String8.h>
#include "perfprofd_record.pb.h"
#include "perfprofd_io.h"
namespace android {
namespace perfprofd {
namespace dropbox {
namespace {
bool WriteDropboxFile(android::perfprofd::PerfprofdRecord* encodedProfile,
const std::string& temp_dir,
std::string* error_msg) {
android::base::unique_fd tmp_fd;
{
char path[PATH_MAX];
snprintf(path, sizeof(path), "%s/dropboxtmp-XXXXXX", temp_dir.c_str());
tmp_fd.reset(mkstemp(path));
if (tmp_fd.get() == -1) {
*error_msg = android::base::StringPrintf("Could not create temp file %s: %s",
path,
strerror(errno));
return false;
}
if (unlink(path) != 0) {
PLOG(WARNING) << "Could not unlink binder temp file";
}
}
// Dropbox takes ownership of the fd, and if it is not readonly,
// a selinux violation will occur. Get a read-only version.
android::base::unique_fd read_only;
{
char fdpath[64];
snprintf(fdpath, arraysize(fdpath), "/proc/self/fd/%d", tmp_fd.get());
read_only.reset(open(fdpath, O_RDONLY | O_CLOEXEC));
if (read_only.get() < 0) {
*error_msg = android::base::StringPrintf("Could not create read-only fd: %s",
strerror(errno));
return false;
}
}
constexpr bool kCompress = true; // Ignore the config here. Dropbox will always end up
// compressing the data, might as well make the temp
// file smaller and help it out.
using DropBoxManager = android::os::DropBoxManager;
constexpr int kDropboxFlags = DropBoxManager::IS_GZIPPED;
if (!SerializeProtobuf(encodedProfile, std::move(tmp_fd), kCompress)) {
*error_msg = "Could not serialize to temp file";
return false;
}
sp<DropBoxManager> dropbox(new DropBoxManager());
android::binder::Status status = dropbox->addFile(String16("perfprofd"),
read_only.release(),
kDropboxFlags);
if (!status.isOk()) {
*error_msg = status.toString8();
return false;
}
return true;
}
} // namespace
bool SendToDropbox(android::perfprofd::PerfprofdRecord* profile,
const std::string& temp_directory,
std::string* error_msg) {
size_t size = profile->ByteSize();
if (size < 1024 * 1024) {
// For a small size, send as a byte buffer directly.
std::unique_ptr<uint8_t[]> data(new uint8_t[size]);
profile->SerializeWithCachedSizesToArray(data.get());
using DropBoxManager = android::os::DropBoxManager;
sp<DropBoxManager> dropbox(new DropBoxManager());
android::binder::Status status = dropbox->addData(String16("perfprofd"),
data.get(),
size,
0);
if (!status.isOk()) {
*error_msg = status.toString8();
return false;
}
return true;
} else {
// For larger buffers, we need to go through the filesystem.
return WriteDropboxFile(profile, temp_directory, error_msg);
}
}
} // namespace dropbox
} // namespace perfprofd
} // namespace android
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