blob: ec0f92456a4d4fed1f1c6b982f712dd34f73ebfe [file] [log] [blame]
// Copyright 2021 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/files/scoped_file.h"
#include "base/memory/scoped_refptr.h"
#include "base/threading/sequenced_task_runner_handle.h"
#include "dlp/fanotify_reader_thread.h"
namespace dlp {
// Interacts with fanotify API to process file access events.
class FanotifyWatcher : public FanotifyReaderThread::Delegate {
class Delegate {
virtual void ProcessFileOpenRequest(
ino_t inode, int pid, base::OnceCallback<void(bool)> callback) = 0;
explicit FanotifyWatcher(Delegate* delegate);
FanotifyWatcher(const FanotifyWatcher&) = delete;
FanotifyWatcher& operator=(const FanotifyWatcher&) = delete;
// Start to listen to event for the mount point with |path|.
void AddWatch(const base::FilePath& path);
void OnFileOpenRequested(ino_t inode, int pid, base::ScopedFD fd) override;
void OnRequestProcessed(base::ScopedFD fd, bool allowed);
scoped_refptr<base::SequencedTaskRunner> task_runner_;
// fanotify file descriptor should be destructed before the reader thread so
// that the read loop there will exit on closed file descriptor.
FanotifyReaderThread thread_;
base::ScopedFD fanotify_fd_;
Delegate* delegate_;
} // namespace dlp