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/*
* Copyright 2017 Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Author: ncardwell@google.com (Neal Cardwell)
*
* Interface for tracking file descriptors in the kernel under test.
*/
#ifndef __FD_STATE_H__
#define __FD_STATE_H__
#include "types.h"
/* The types of file descriptor objects packetdrill can test. */
enum fd_type_t {
FD_SOCKET = 1,
FD_FILE,
FD_PIPE,
FD_EPOLL,
};
struct state;
struct fd_state;
/* Global info about a particular kind of file descriptor. */
struct fd_ops {
enum fd_type_t type; /* type of this file descriptor */
/* Handler for closing fd. */
void (*close)(struct state *state, struct fd_state *fd);
};
/* State for a file descriptor during script execution. */
struct fd_state {
struct fd_ops *ops; /* info/ops for this type of fd */
int script_fd; /* file descriptor in the script source */
int live_fd; /* file descriptor in packetdrill runtime */
bool is_closed; /* has app called close(2) ? */
struct fd_state *next; /* next fd in linked list */
};
/* To cast any type of fd to the base classs. */
static inline struct fd_state *to_fd(void *fd)
{
return (struct fd_state *)fd;
}
#endif /* __FD_STATE_H__ */
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