/* * UNIX		An implementation of the AF_UNIX network domain for the *		LINUX operating system.  UNIX is implemented using the *		BSD Socket interface as the means of communication with *		the user level. * *		This file descibes some things of the UNIX protocol family *		module.  It is mainly used for the "proc" sub-module now, *		but it may be useful for cleaning up the UNIX module as a *		whole later. * * Version:	@(#)unix.h	1.0.3	05/25/93 * * Authors:	Orest Zborowski, <obz@Kodak.COM> *		Ross Biro, <bir7@leland.Stanford.Edu> *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * * Fixes: *		Dmitry Gorodchanin	-	proc locking * *		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. */#ifdef _LINUX_UN_Hstruct unix_proto_data {	int		refcnt;		/* cnt of reference 0=free	*/					/* -1=not initialised	-bgm	*/	struct socket	*socket;	/* socket we're bound to	*/	int		protocol;	struct sockaddr_un	sockaddr_un;	short		sockaddr_len;	/* >0 if name bound		*/	char		*buf;	int		bp_head, bp_tail;	struct inode	*inode;	struct unix_proto_data	*peerupd;	struct wait_queue *wait;	/* Lock across page faults (FvK) */	int		lock_flag;};extern struct unix_proto_data unix_datas[NSOCKETS];#define last_unix_data		(unix_datas + NSOCKETS - 1)#define UN_DATA(SOCK) 		((struct unix_proto_data *)(SOCK)->data)#define UN_PATH_OFFSET		((unsigned long)((struct sockaddr_un *)0) \							->sun_path)/* * Buffer size must be power of 2. buffer mgmt inspired by pipe code. * note that buffer contents can wraparound, and we can write one byte less * than full size to discern full vs empty. */#define BUF_SIZE		PAGE_SIZE#define UN_BUF_AVAIL(UPD)	(((UPD)->bp_head - (UPD)->bp_tail) & \								(BUF_SIZE-1))#define UN_BUF_SPACE(UPD)	((BUF_SIZE-1) - UN_BUF_AVAIL(UPD))#endif	/* _LINUX_UN_H */extern void	unix_proto_init(struct ddi_proto *pro);