1 /*- 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: @(#)kern_acct.c 8.1 (Berkeley) 6/14/93 39 */ 40 41 #include <sys/param.h> 42 #include <sys/proc.h> 43 #include <sys/mount.h> 44 #include <sys/vnode.h> 45 #include <sys/file.h> 46 #include <sys/syslog.h> 47 #include <sys/kernel.h> 48 49 struct acct_args { 50 char *fname; 51 }; 52 int 53 acct(a1, a2, a3) 54 struct proc *a1; 55 struct acct_args *a2; 56 int *a3; 57 { 58 /* 59 * Body deleted. 60 */ 61 return (ENOSYS); 62 } 63 64 void 65 acct_process(a1) 66 struct proc *a1; 67 { 68 69 /* 70 * Body deleted. 71 */ 72 return; 73 } 74 75 /* 76 * Periodically check the file system to see if accounting 77 * should be turned on or off. 78 */ 79 80 /* 81 * Values associated with enabling and disabling accounting 82 */ 83 int acctsuspend = 2; /* stop accounting when < 2% free space left */ 84 int acctresume = 4; /* resume when free space risen to > 4% */ 85 int acctchkfreq = 15; /* frequency (in seconds) to check space */ 86 87 /* 88 * SHOULD REPLACE THIS WITH A DRIVER THAT CAN BE READ TO SIMPLIFY. 89 */ 90 struct vnode *acctp; 91 struct vnode *savacctp; 92 93 /* ARGSUSED */ 94 void 95 acctwatch(a) 96 void *a; 97 { 98 struct statfs sb; 99 100 if (savacctp) { 101 (void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0); 102 if (sb.f_bavail > acctresume * sb.f_blocks / 100) { 103 acctp = savacctp; 104 savacctp = NULL; 105 log(LOG_NOTICE, "Accounting resumed\n"); 106 } 107 } else { 108 if (acctp == NULL) 109 return; 110 (void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0); 111 if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) { 112 savacctp = acctp; 113 acctp = NULL; 114 log(LOG_NOTICE, "Accounting suspended\n"); 115 } 116 } 117 timeout(acctwatch, NULL, acctchkfreq * hz); 118 } 119