flexnbd-c/src/server/control.h

#ifndef CONTROL_H
#define CONTROL_H

/* We need this to avoid a complaint about struct server * in
 * void accept_control_connection
 */
struct server;

#include "parse.h"
#include "mirror.h"
#include "serve.h"
#include "flexnbd.h"
#include "mbox.h"

struct control {
	struct flexnbd * flexnbd;
	int control_fd;
	const char * socket_name;

	pthread_t thread;

	struct self_pipe * open_signal;
	struct self_pipe * close_signal;

	/* This is owned by the control object, and used by a
	 * mirror_super to communicate the state of a mirror attempt as
	 * early as feasible.  It can't be owned by the mirror_super
	 * object because the mirror_super object can be freed at any
	 * time (including while the control_client is waiting on it),
	 * whereas the control object lasts for the lifetime of the
	 * process (and we can only have a mirror thread if the control
	 * thread has started it).
	 */
	struct mbox * mirror_state_mbox;
};

struct control_client{
	int              socket;
	struct flexnbd * flexnbd;

	/* Passed in on creation.  We know it's all right to do this
	 * because we know there's only ever one control_client.
	 */
	struct mbox * mirror_state_mbox;
};

struct control * control_create(
		struct flexnbd *,
		const char * control_socket_name );
void control_signal_close( struct control * );
void control_destroy( struct control * );

void * control_runner( void * );

void accept_control_connection(struct server* params, int client_fd, union mysockaddr* client_address);
void serve_open_control_socket(struct server* params);

#endif