xref: /freebsd/sys/kern/kern_acct.c (revision df8bae1de4b67ccf57f4afebd4e2bf258c38910d)
1df8bae1dSRodney W. Grimes /*-
2df8bae1dSRodney W. Grimes  * Copyright (c) 1982, 1986, 1989, 1993
3df8bae1dSRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
4df8bae1dSRodney W. Grimes  * (c) UNIX System Laboratories, Inc.
5df8bae1dSRodney W. Grimes  * All or some portions of this file are derived from material licensed
6df8bae1dSRodney W. Grimes  * to the University of California by American Telephone and Telegraph
7df8bae1dSRodney W. Grimes  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8df8bae1dSRodney W. Grimes  * the permission of UNIX System Laboratories, Inc.
9df8bae1dSRodney W. Grimes  *
10df8bae1dSRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
11df8bae1dSRodney W. Grimes  * modification, are permitted provided that the following conditions
12df8bae1dSRodney W. Grimes  * are met:
13df8bae1dSRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
14df8bae1dSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
15df8bae1dSRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
16df8bae1dSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
17df8bae1dSRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
18df8bae1dSRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
19df8bae1dSRodney W. Grimes  *    must display the following acknowledgement:
20df8bae1dSRodney W. Grimes  *	This product includes software developed by the University of
21df8bae1dSRodney W. Grimes  *	California, Berkeley and its contributors.
22df8bae1dSRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
23df8bae1dSRodney W. Grimes  *    may be used to endorse or promote products derived from this software
24df8bae1dSRodney W. Grimes  *    without specific prior written permission.
25df8bae1dSRodney W. Grimes  *
26df8bae1dSRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27df8bae1dSRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28df8bae1dSRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29df8bae1dSRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30df8bae1dSRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31df8bae1dSRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32df8bae1dSRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33df8bae1dSRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34df8bae1dSRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35df8bae1dSRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36df8bae1dSRodney W. Grimes  * SUCH DAMAGE.
37df8bae1dSRodney W. Grimes  *
38df8bae1dSRodney W. Grimes  *	from: @(#)kern_acct.c	8.1 (Berkeley) 6/14/93
39df8bae1dSRodney W. Grimes  */
40df8bae1dSRodney W. Grimes 
41df8bae1dSRodney W. Grimes #include <sys/param.h>
42df8bae1dSRodney W. Grimes #include <sys/proc.h>
43df8bae1dSRodney W. Grimes #include <sys/mount.h>
44df8bae1dSRodney W. Grimes #include <sys/vnode.h>
45df8bae1dSRodney W. Grimes #include <sys/file.h>
46df8bae1dSRodney W. Grimes #include <sys/syslog.h>
47df8bae1dSRodney W. Grimes #include <sys/kernel.h>
48df8bae1dSRodney W. Grimes 
49df8bae1dSRodney W. Grimes struct acct_args {
50df8bae1dSRodney W. Grimes 	char	*fname;
51df8bae1dSRodney W. Grimes };
52df8bae1dSRodney W. Grimes acct(a1, a2, a3)
53df8bae1dSRodney W. Grimes 	struct proc *a1;
54df8bae1dSRodney W. Grimes 	struct acct_args *a2;
55df8bae1dSRodney W. Grimes 	int *a3;
56df8bae1dSRodney W. Grimes {
57df8bae1dSRodney W. Grimes 	/*
58df8bae1dSRodney W. Grimes 	 * Body deleted.
59df8bae1dSRodney W. Grimes 	 */
60df8bae1dSRodney W. Grimes 	return (ENOSYS);
61df8bae1dSRodney W. Grimes }
62df8bae1dSRodney W. Grimes 
63df8bae1dSRodney W. Grimes acct_process(a1)
64df8bae1dSRodney W. Grimes 	struct proc *a1;
65df8bae1dSRodney W. Grimes {
66df8bae1dSRodney W. Grimes 
67df8bae1dSRodney W. Grimes 	/*
68df8bae1dSRodney W. Grimes 	 * Body deleted.
69df8bae1dSRodney W. Grimes 	 */
70df8bae1dSRodney W. Grimes 	return;
71df8bae1dSRodney W. Grimes }
72df8bae1dSRodney W. Grimes 
73df8bae1dSRodney W. Grimes /*
74df8bae1dSRodney W. Grimes  * Periodically check the file system to see if accounting
75df8bae1dSRodney W. Grimes  * should be turned on or off.
76df8bae1dSRodney W. Grimes  */
77df8bae1dSRodney W. Grimes 
78df8bae1dSRodney W. Grimes /*
79df8bae1dSRodney W. Grimes  * Values associated with enabling and disabling accounting
80df8bae1dSRodney W. Grimes  */
81df8bae1dSRodney W. Grimes int	acctsuspend = 2;	/* stop accounting when < 2% free space left */
82df8bae1dSRodney W. Grimes int	acctresume = 4;		/* resume when free space risen to > 4% */
83df8bae1dSRodney W. Grimes int	acctchkfreq = 15;	/* frequency (in seconds) to check space */
84df8bae1dSRodney W. Grimes 
85df8bae1dSRodney W. Grimes /*
86df8bae1dSRodney W. Grimes  * SHOULD REPLACE THIS WITH A DRIVER THAT CAN BE READ TO SIMPLIFY.
87df8bae1dSRodney W. Grimes  */
88df8bae1dSRodney W. Grimes struct	vnode *acctp;
89df8bae1dSRodney W. Grimes struct	vnode *savacctp;
90df8bae1dSRodney W. Grimes 
91df8bae1dSRodney W. Grimes /* ARGSUSED */
92df8bae1dSRodney W. Grimes void
93df8bae1dSRodney W. Grimes acctwatch(a)
94df8bae1dSRodney W. Grimes 	void *a;
95df8bae1dSRodney W. Grimes {
96df8bae1dSRodney W. Grimes 	struct statfs sb;
97df8bae1dSRodney W. Grimes 
98df8bae1dSRodney W. Grimes 	if (savacctp) {
99df8bae1dSRodney W. Grimes 		(void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0);
100df8bae1dSRodney W. Grimes 		if (sb.f_bavail > acctresume * sb.f_blocks / 100) {
101df8bae1dSRodney W. Grimes 			acctp = savacctp;
102df8bae1dSRodney W. Grimes 			savacctp = NULL;
103df8bae1dSRodney W. Grimes 			log(LOG_NOTICE, "Accounting resumed\n");
104df8bae1dSRodney W. Grimes 		}
105df8bae1dSRodney W. Grimes 	} else {
106df8bae1dSRodney W. Grimes 		if (acctp == NULL)
107df8bae1dSRodney W. Grimes 			return;
108df8bae1dSRodney W. Grimes 		(void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0);
109df8bae1dSRodney W. Grimes 		if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) {
110df8bae1dSRodney W. Grimes 			savacctp = acctp;
111df8bae1dSRodney W. Grimes 			acctp = NULL;
112df8bae1dSRodney W. Grimes 			log(LOG_NOTICE, "Accounting suspended\n");
113df8bae1dSRodney W. Grimes 		}
114df8bae1dSRodney W. Grimes 	}
115df8bae1dSRodney W. Grimes 	timeout(acctwatch, NULL, acctchkfreq * hz);
116df8bae1dSRodney W. Grimes }
117