[unix-history] / sys / nfs / nfsrvcache.h

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	From:	@(#)nfsrvcache.h	7.3 (Berkeley) 6/28/90
 *	$Id: nfsrvcache.h,v 1.2 1993/09/09 22:06:26 rgrimes Exp $
 */

#ifndef __h_nfsrvcache
#define __h_nfsrvcache 1

/*
 * Definitions for the server recent request cache
 */

#define	NFSRVCACHESIZ	128
#define	NFSRCHSZ	32

struct nfsrvcache {
	struct	nfsrvcache *rc_chain[2];	/* Hash chain links */
	struct	nfsrvcache *rc_next;	/* Lru list */
	struct	nfsrvcache *rc_prev;
	int	rc_state;		/* Current state of request */
	int	rc_flag;		/* Flag bits */
	struct	mbuf rc_nam;		/* Sockaddr of requestor */
	u_long	rc_xid;			/* rpc id number */
	int	rc_proc;		/* rpc proc number */
	long	rc_timestamp;		/* Time stamp */
	union {
		struct mbuf *rc_repmb;	/* Reply mbuf list OR */
		int rc_repstat;		/* Reply status */
	} rc_un;
};

#define	rc_forw		rc_chain[0]
#define	rc_back		rc_chain[1]
#define	rc_status	rc_un.rc_repstat
#define	rc_reply	rc_un.rc_repmb

#define	put_at_head(rp) \
		(rp)->rc_prev->rc_next = (rp)->rc_next; \
		(rp)->rc_next->rc_prev = (rp)->rc_prev; \
		(rp)->rc_next = nfsrvcachehead.rc_next; \
		(rp)->rc_next->rc_prev = (rp); \
		nfsrvcachehead.rc_next = (rp); \
		(rp)->rc_prev = &nfsrvcachehead

/* Cache entry states */
#define	RC_UNUSED	0
#define	RC_INPROG	1
#define	RC_DONE		2

/* Return values */
#define	RC_DROPIT	0
#define	RC_REPLY	1
#define	RC_DOIT		2

/* Flag bits */
#define	RC_LOCKED	0x1
#define	RC_WANTED	0x2
#define	RC_REPSTATUS	0x4
#define	RC_REPMBUF	0x8

/* Delay time after completion that request is dropped */
#define	RC_DELAY	2		/* seconds */

#ifdef KERNEL

extern void nfsrv_initcache(void);
extern int nfsrv_getcache(struct mbuf *, u_long, int, struct mbuf **);
extern void nfsrv_updatecache(struct mbuf *, u_long, int, int, int, 
			      struct mbuf *);

#endif /* KERNEL */
#endif /* __h_nfsrvcache */
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Rick Macklem at The University of Guelph.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
a8599e88	36	* From: @(#)nfsrvcache.h 7.3 (Berkeley) 6/28/90
fde1aeb2	37	* $Id: nfsrvcache.h,v 1.2 1993/09/09 22:06:26 rgrimes Exp $
15637ed4 RG	38	*/
15637ed4 RG	39
a8599e88 RG	40	#ifndef __h_nfsrvcache
	41	#define __h_nfsrvcache 1
	42
15637ed4 RG	43	/*
	44	* Definitions for the server recent request cache
	45	*/
	46
	47	#define NFSRVCACHESIZ 128
	48	#define NFSRCHSZ 32
	49
	50	struct nfsrvcache {
	51	struct nfsrvcache rc_chain[2]; / Hash chain links */
	52	struct nfsrvcache rc_next; / Lru list */
	53	struct nfsrvcache *rc_prev;
	54	int rc_state; /* Current state of request */
	55	int rc_flag; /* Flag bits */
	56	struct mbuf rc_nam; /* Sockaddr of requestor */
	57	u_long rc_xid; /* rpc id number */
	58	int rc_proc; /* rpc proc number */
	59	long rc_timestamp; /* Time stamp */
	60	union {
	61	struct mbuf rc_repmb; / Reply mbuf list OR */
	62	int rc_repstat; /* Reply status */
	63	} rc_un;
	64	};
	65
	66	#define rc_forw rc_chain[0]
	67	#define rc_back rc_chain[1]
	68	#define rc_status rc_un.rc_repstat
	69	#define rc_reply rc_un.rc_repmb
	70
	71	#define put_at_head(rp) \
	72	(rp)->rc_prev->rc_next = (rp)->rc_next; \
	73	(rp)->rc_next->rc_prev = (rp)->rc_prev; \
	74	(rp)->rc_next = nfsrvcachehead.rc_next; \
	75	(rp)->rc_next->rc_prev = (rp); \
	76	nfsrvcachehead.rc_next = (rp); \
	77	(rp)->rc_prev = &nfsrvcachehead
	78
	79	/* Cache entry states */
	80	#define RC_UNUSED 0
	81	#define RC_INPROG 1
	82	#define RC_DONE 2
	83
	84	/* Return values */
	85	#define RC_DROPIT 0
	86	#define RC_REPLY 1
	87	#define RC_DOIT 2
	88
	89	/* Flag bits */
	90	#define RC_LOCKED 0x1
	91	#define RC_WANTED 0x2
	92	#define RC_REPSTATUS 0x4
	93	#define RC_REPMBUF 0x8
	94
	95	/* Delay time after completion that request is dropped */
	96	#define RC_DELAY 2 /* seconds */
	97
fde1aeb2	98	#ifdef KERNEL
a8599e88	99
fde1aeb2 GW	100	extern void nfsrv_initcache(void);
	101	extern int nfsrv_getcache(struct mbuf , u_long, int, struct mbuf *);
	102	extern void nfsrv_updatecache(struct mbuf *, u_long, int, int, int,
	103	struct mbuf *);
	104
	105	#endif /* KERNEL */
a8599e88	106	#endif /* __h_nfsrvcache */