xref: /netbsd-src/sys/nfs/nfsrtt.h (revision 1323029832cc0d57fb205789f4d60c332cd981af)
1 /*	$NetBSD: nfsrtt.h,v 1.11 2024/12/07 02:05:55 riastradh Exp $	*/
2 
3 /*
4  * Copyright (c) 1992, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Rick Macklem at The University of Guelph.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  *	@(#)nfsrtt.h	8.2 (Berkeley) 3/30/95
35  */
36 
37 #ifndef _NFS_NFSRTT_H_
38 #define	_NFS_NFSRTT_H_
39 
40 #include <sys/types.h>
41 
42 #include <sys/fstypes.h>
43 #include <sys/time.h>
44 
45 /*
46  * Definitions for performance monitor.
47  * The client and server logging are turned on by setting the global
48  * constant "nfsrtton" to 1.
49  */
50 #define	NFSRTTLOGSIZ	128
51 
52 /*
53  * Circular log of client side rpc activity. Each log entry is for one
54  * rpc filled in upon completion. (ie. in order of completion)
55  * The "pos" is the table index for the "next" entry, therefore the
56  * list goes from nfsrtt.rttl[pos] --> nfsrtt.rttl[pos - 1] in
57  * chronological order of completion.
58  */
59 struct rttl {
60 	u_int32_t	proc;			/* NFS procedure number */
61 	int		rtt;			/* Measured round trip time */
62 	int		rto;			/* Round Trip Timeout */
63 	int		sent;			/* # rpcs in progress */
64 	int		cwnd;			/* Send window */
65 	int		srtt;			/* Ave Round Trip Time */
66 	int		sdrtt;			/* Ave mean deviation of RTT */
67 	fsid_t		fsid;			/* Fsid for mount point */
68 	struct timeval	tstamp;			/* Timestamp of log entry */
69 };
70 
71 struct nfsrtt {
72 	int pos;			/* Position in array for next entry */
73 	struct rttl rttl[NFSRTTLOGSIZ];
74 };
75 
76 /*
77  * And definitions for server side performance monitor.
78  * The log organization is the same as above except it is filled in at the
79  * time the server sends the rpc reply.
80  */
81 
82 /*
83  * Bits for the flags field.
84  */
85 #define	DRT_TCP		0x02	/* Client used TCP transport */
86 #define	DRT_CACHEREPLY	0x04	/* Reply was from recent request cache */
87 #define	DRT_CACHEDROP	0x08	/* Rpc request dropped, due to recent reply */
88 #define DRT_NFSV3	0x10	/* Rpc used NFS Version 3 */
89 
90 /*
91  * Server log structure
92  * NB: ipadr == INADDR_ANY indicates a client using a non IP protocol.
93  *	(ISO perhaps?)
94  */
95 struct nfsdrt {
96 	int pos;			/* Position of next log entry */
97 	struct drt {
98 		int       flag;		/* Bits as defined above */
99 		u_int32_t proc;		/* NFS procedure number */
100 		u_int32_t ipadr;	/* IP address of client */
101 		int       resptime;	/* Response time (usec) */
102 		struct timeval tstamp;	/* Timestamp of log entry */
103 	} drt[NFSRTTLOGSIZ];
104 };
105 
106 #ifdef _KERNEL
107 extern int nfsrtton;
108 #endif
109 
110 #endif	/* _NFS_NFSRTT_H_ */
111