[unix-history] / sys / kern / kern_acct.c

/*
 * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * 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: @(#)kern_acct.c	7.18 (Berkeley) 5/11/91
 *	$Id: kern_acct.c,v 1.3 1993/10/16 15:24:07 rgrimes Exp $
 */

#include "param.h"
#include "systm.h"
#include "namei.h"
#include "resourcevar.h"
#include "proc.h"
#include "ioctl.h"
#include "termios.h"
#include "tty.h"
#include "vnode.h"
#include "mount.h"
#include "kernel.h"
#include "file.h"
#include "acct.h"
#include "syslog.h"

#include "vm/vm.h"
#include "vm/vm_param.h"

/*
 * Values associated with enabling and disabling accounting
 */
int	acctsuspend = 2;	/* stop accounting when < 2% free space left */
int	acctresume = 4;		/* resume when free space risen to > 4% */
struct	timeval chk = { 15, 0 };/* frequency to check space for accounting */
struct  vnode *acctp = NULL;	/* file to which to do accounting */
struct  vnode *savacctp = NULL;	/* file to which to do accounting when space */

/*
 * Enable or disable process accounting.
 *
 * If a non-null filename is given, that file is used to store accounting
 * records on process exit. If a null filename is given process accounting
 * is suspended. If accounting is enabled, the system checks the amount
 * of freespace on the filesystem at timeval intervals. If the amount of
 * freespace is below acctsuspend percent, accounting is suspended. If
 * accounting has been suspended, and freespace rises above acctresume,
 * accounting is resumed.
 */

/* Mark Tinguely (tinguely@plains.NoDak.edu) 8/10/93 */

/* ARGSUSED */
sysacct(p, uap, retval)
	struct proc *p;
	struct args {
		char	*fname;
	} *uap;
	int *retval;
{

	register struct nameidata *ndp;
	struct nameidata nd;
	struct vattr attr;
	int rv, acctwatch();

	if (p->p_ucred->cr_uid != 0)
		return(EPERM);		/* must be root */

	/*
	 * Step 1. turn off accounting (if on). exit if fname is nil
	 */

	rv = 0;				/* just in case nothing is open */
	if (acctp != NULL) {
		rv = vn_close(acctp, FWRITE, p->p_ucred, p);
		untimeout(acctwatch, (caddr_t) &chk);	/* turn off disk check */
		acctp = NULL;
	}
	else if (savacctp != NULL ) {
		rv = vn_close(savacctp, FWRITE, p->p_ucred, p);
		untimeout(acctwatch, (caddr_t) &chk);	/* turn off disk check */
		savacctp = NULL;
	}
	
	if (uap->fname == NULL)		/* accounting stopping complete */
		return(rv);

	/*
	 * Step 2. open accounting filename for writing.
	 */

	nd.ni_segflg = UIO_USERSPACE;
	nd.ni_dirp = uap->fname;

	/* is it there? */
	if (rv = vn_open(&nd, p, FWRITE, 0))
		return (rv);

	/* Step 2. Check the attributes on accounting file */
	rv = VOP_GETATTR(nd.ni_vp, &attr, p->p_ucred, p);
	if (rv)
		goto acct_fail;

	/* is filesystem writable, do I have permission to write and is
	 * a regular file?
	 */
        if (nd.ni_vp->v_mount->mnt_flag & MNT_RDONLY) {
		rv = EROFS;	/* to be consistant with man page */
		goto acct_fail;
	}

	if ((VOP_ACCESS(nd.ni_vp, VWRITE, p->p_ucred, p)) ||
	    (attr.va_type != VREG)) {
		rv = EACCES;	/* permission denied error */
		goto acct_fail;
	}

	/* Step 3. Save the accounting file vnode, schedule freespace watch. */

	acctp  = nd.ni_vp;
	savacctp = NULL;
	acctwatch(&chk);		/* look for full system */
	VOP_UNLOCK(acctp);
	return(0);		/* end successfully */

acct_fail:

	vn_close(nd.ni_vp, FWRITE, p->p_ucred, p);
	return(rv);
}

/*
 * Periodically check the file system to see if accounting
 * should be turned on or off.
 */
acctwatch(resettime)
	struct timeval *resettime;
{
	struct statfs sb;

	if (savacctp) {
		(void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0);
		if (sb.f_bavail > acctresume * sb.f_blocks / 100) {
			acctp = savacctp;
			savacctp = NULL;
			log(LOG_NOTICE, "Accounting resumed\n");
			return;
		}
	}
	if (acctp == NULL)
		return;
	(void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0);
	if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) {
		savacctp = acctp;
		acctp = NULL;
		log(LOG_NOTICE, "Accounting suspended\n");
	}
	timeout(acctwatch, (caddr_t)resettime, hzto(resettime));
}

/*
 * This routine calculates an accounting record for a process and,
 * if accounting is enabled, writes it to the accounting file.
 */

/* Mark Tinguely (tinguely@plains.NoDak.edu) 8/10/93 */

acct(p)
	register struct proc *p;
{

	struct acct acct;
	struct rusage *r;
	int rv;
	long i;
	u_int cnt;
	char *c;
	comp_t int2comp();


	if (acctp == NULL)	/* accounting not turned on */
		return;

	/* Step 1. Get command name (remove path if necessary) */

	strncpy(acct.ac_comm, p->p_comm, sizeof(acct.ac_comm));

	/* Step 2. Get rest of information */

	acct.ac_utime = int2comp((unsigned) p->p_utime.tv_sec * 1000000 + p->p_utime.tv_usec);
	acct.ac_stime = int2comp((unsigned) p->p_stime.tv_sec * 1000000 + p->p_stime.tv_usec);
	acct.ac_btime = p->p_stats->p_start.tv_sec;
			/* elapse time = current - start */
	i = (time.tv_sec - p->p_stats->p_start.tv_sec) * 1000000 +
	    (time.tv_usec - p->p_stats->p_start.tv_usec);
	acct.ac_etime = int2comp((unsigned) i);

	acct.ac_uid = p->p_cred->p_ruid;
	acct.ac_gid = p->p_cred->p_rgid;

	r = &p->p_stats->p_ru;
	if (i = (p->p_utime.tv_sec + p->p_stime.tv_sec) * hz +
	        (p->p_utime.tv_usec + p->p_stime.tv_usec) / tick)
		acct.ac_mem = (r->ru_ixrss + r->ru_idrss + r->ru_isrss) / i;
	else
		acct.ac_mem = 0;
	acct.ac_io = int2comp((unsigned) (r->ru_inblock + r->ru_oublock) * 1000000);

	if ((p->p_flag & SCTTY) && p->p_pgrp->pg_session->s_ttyp)
		acct.ac_tty = p->p_pgrp->pg_session->s_ttyp->t_dev;
	else
		acct.ac_tty = NODEV;
	acct.ac_flag = p->p_acflag;

	/* Step 3. Write record to file */


	rv = vn_rdwr(UIO_WRITE, acctp, (caddr_t) &acct, sizeof (acct), 
	    (off_t)0, UIO_SYSSPACE, IO_APPEND|IO_UNIT, p->p_ucred, (int *) NULL,
	    p);
}

/*  int2comp converts from ticks in a microsecond to ticks in 1/AHZ second
 * 
 * comp_t is a psuedo-floating point number with 13 bits of
 * mantissa and 3 bits of base 8 exponent and has resolution
 * of 1/AHZ seconds.
 *
 * notice I already converted the incoming values into microseconds
 * I need to convert back into AHZ ticks.
 */

/* Mark Tinguely (tinguely@plains.NoDak.edu) 8/10/93 */


#define RES 13
#define EXP 3
#define MAXFRACT 1<<RES

comp_t
int2comp(mantissa)
unsigned int mantissa;
{
	comp_t exp=0;

	mantissa = mantissa * AHZ / 1000000;	/* convert back to AHZ ticks */
	while (mantissa > MAXFRACT) {
		mantissa >>= EXP;	/* base 8 exponent */
		exp++;
	}
	exp <<= RES;		/* move the exponent */
	exp += mantissa;	/* add on the manissa */
	return (exp);
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
	33	* from: @(#)kern_acct.c 7.18 (Berkeley) 5/11/91
d0409160	34	* $Id: kern_acct.c,v 1.3 1993/10/16 15:24:07 rgrimes Exp $
15637ed4 RG	35	*/
	36
	37	#include "param.h"
	38	#include "systm.h"
	39	#include "namei.h"
	40	#include "resourcevar.h"
	41	#include "proc.h"
	42	#include "ioctl.h"
	43	#include "termios.h"
	44	#include "tty.h"
	45	#include "vnode.h"
	46	#include "mount.h"
	47	#include "kernel.h"
	48	#include "file.h"
	49	#include "acct.h"
	50	#include "syslog.h"
	51
d0409160 NW	52	#include "vm/vm.h"
	53	#include "vm/vm_param.h"
	54
15637ed4 RG	55	/*
	56	* Values associated with enabling and disabling accounting
	57	*/
	58	int acctsuspend = 2; /* stop accounting when < 2% free space left */
	59	int acctresume = 4; /* resume when free space risen to > 4% */
	60	struct timeval chk = { 15, 0 };/* frequency to check space for accounting */
d0409160 NW	61	struct vnode acctp = NULL; / file to which to do accounting */
d0409160 NW	62	struct vnode savacctp = NULL; / file to which to do accounting when space */
15637ed4 RG	63
	64	/*
	65	* Enable or disable process accounting.
	66	*
	67	* If a non-null filename is given, that file is used to store accounting
	68	* records on process exit. If a null filename is given process accounting
	69	* is suspended. If accounting is enabled, the system checks the amount
	70	* of freespace on the filesystem at timeval intervals. If the amount of
	71	* freespace is below acctsuspend percent, accounting is suspended. If
	72	* accounting has been suspended, and freespace rises above acctresume,
	73	* accounting is resumed.
	74	*/
3c7eb27c	75
d0409160	76	/* Mark Tinguely (tinguely@plains.NoDak.edu) 8/10/93 */
3c7eb27c	77
15637ed4 RG	78	/* ARGSUSED */
	79	sysacct(p, uap, retval)
	80	struct proc *p;
d0409160 NW	81	struct args {
	82	char *fname;
	83	} *uap;
15637ed4 RG	84	int *retval;
	85	{
	86
d0409160 NW	87	register struct nameidata *ndp;
	88	struct nameidata nd;
	89	struct vattr attr;
	90	int rv, acctwatch();
	91
	92	if (p->p_ucred->cr_uid != 0)
	93	return(EPERM); /* must be root */
	94
15637ed4	95	/*
d0409160	96	* Step 1. turn off accounting (if on). exit if fname is nil
15637ed4	97	*/
d0409160 NW	98
	99	rv = 0; /* just in case nothing is open */
	100	if (acctp != NULL) {
	101	rv = vn_close(acctp, FWRITE, p->p_ucred, p);
	102	untimeout(acctwatch, (caddr_t) &chk); /* turn off disk check */
	103	acctp = NULL;
	104	}
	105	else if (savacctp != NULL ) {
	106	rv = vn_close(savacctp, FWRITE, p->p_ucred, p);
	107	untimeout(acctwatch, (caddr_t) &chk); /* turn off disk check */
	108	savacctp = NULL;
	109	}
	110
	111	if (uap->fname == NULL) /* accounting stopping complete */
	112	return(rv);
	113
	114	/*
	115	* Step 2. open accounting filename for writing.
	116	*/
	117
	118	nd.ni_segflg = UIO_USERSPACE;
	119	nd.ni_dirp = uap->fname;
	120
	121	/* is it there? */
	122	if (rv = vn_open(&nd, p, FWRITE, 0))
	123	return (rv);
	124
	125	/* Step 2. Check the attributes on accounting file */
	126	rv = VOP_GETATTR(nd.ni_vp, &attr, p->p_ucred, p);
	127	if (rv)
	128	goto acct_fail;
	129
	130	/* is filesystem writable, do I have permission to write and is
	131	* a regular file?
	132	*/
	133	if (nd.ni_vp->v_mount->mnt_flag & MNT_RDONLY) {
	134	rv = EROFS; /* to be consistant with man page */
	135	goto acct_fail;
	136	}
	137
	138	if ((VOP_ACCESS(nd.ni_vp, VWRITE, p->p_ucred, p)) \|\|
	139	(attr.va_type != VREG)) {
	140	rv = EACCES; /* permission denied error */
	141	goto acct_fail;
	142	}
	143
	144	/* Step 3. Save the accounting file vnode, schedule freespace watch. */
	145
	146	acctp = nd.ni_vp;
	147	savacctp = NULL;
	148	acctwatch(&chk); /* look for full system */
	149	VOP_UNLOCK(acctp);
	150	return(0); /* end successfully */
	151
	152	acct_fail:
	153
	154	vn_close(nd.ni_vp, FWRITE, p->p_ucred, p);
	155	return(rv);
15637ed4 RG	156	}
	157
	158	/*
	159	* Periodically check the file system to see if accounting
	160	* should be turned on or off.
	161	*/
	162	acctwatch(resettime)
	163	struct timeval *resettime;
	164	{
	165	struct statfs sb;
	166
	167	if (savacctp) {
	168	(void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0);
	169	if (sb.f_bavail > acctresume * sb.f_blocks / 100) {
	170	acctp = savacctp;
	171	savacctp = NULL;
	172	log(LOG_NOTICE, "Accounting resumed\n");
	173	return;
	174	}
	175	}
	176	if (acctp == NULL)
	177	return;
	178	(void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0);
	179	if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) {
	180	savacctp = acctp;
	181	acctp = NULL;
	182	log(LOG_NOTICE, "Accounting suspended\n");
	183	}
	184	timeout(acctwatch, (caddr_t)resettime, hzto(resettime));
	185	}
	186
	187	/*
	188	* This routine calculates an accounting record for a process and,
	189	* if accounting is enabled, writes it to the accounting file.
	190	*/
d0409160 NW	191
	192	/* Mark Tinguely (tinguely@plains.NoDak.edu) 8/10/93 */
	193
15637ed4 RG	194	acct(p)
	195	register struct proc *p;
	196	{
	197
d0409160 NW	198	struct acct acct;
	199	struct rusage *r;
	200	int rv;
	201	long i;
	202	u_int cnt;
	203	char *c;
	204	comp_t int2comp();
	205
	206
	207	if (acctp == NULL) /* accounting not turned on */
	208	return;
	209
	210	/* Step 1. Get command name (remove path if necessary) */
	211
	212	strncpy(acct.ac_comm, p->p_comm, sizeof(acct.ac_comm));
	213
	214	/* Step 2. Get rest of information */
	215
	216	acct.ac_utime = int2comp((unsigned) p->p_utime.tv_sec * 1000000 + p->p_utime.tv_usec);
	217	acct.ac_stime = int2comp((unsigned) p->p_stime.tv_sec * 1000000 + p->p_stime.tv_usec);
	218	acct.ac_btime = p->p_stats->p_start.tv_sec;
	219	/* elapse time = current - start */
	220	i = (time.tv_sec - p->p_stats->p_start.tv_sec) * 1000000 +
	221	(time.tv_usec - p->p_stats->p_start.tv_usec);
	222	acct.ac_etime = int2comp((unsigned) i);
	223
	224	acct.ac_uid = p->p_cred->p_ruid;
	225	acct.ac_gid = p->p_cred->p_rgid;
	226
	227	r = &p->p_stats->p_ru;
	228	if (i = (p->p_utime.tv_sec + p->p_stime.tv_sec) * hz +
	229	(p->p_utime.tv_usec + p->p_stime.tv_usec) / tick)
	230	acct.ac_mem = (r->ru_ixrss + r->ru_idrss + r->ru_isrss) / i;
	231	else
	232	acct.ac_mem = 0;
	233	acct.ac_io = int2comp((unsigned) (r->ru_inblock + r->ru_oublock) * 1000000);
	234
	235	if ((p->p_flag & SCTTY) && p->p_pgrp->pg_session->s_ttyp)
	236	acct.ac_tty = p->p_pgrp->pg_session->s_ttyp->t_dev;
	237	else
	238	acct.ac_tty = NODEV;
	239	acct.ac_flag = p->p_acflag;
	240
	241	/* Step 3. Write record to file */
	242
	243
	244	rv = vn_rdwr(UIO_WRITE, acctp, (caddr_t) &acct, sizeof (acct),
	245	(off_t)0, UIO_SYSSPACE, IO_APPEND\|IO_UNIT, p->p_ucred, (int *) NULL,
	246	p);
	247	}
	248
	249	/* int2comp converts from ticks in a microsecond to ticks in 1/AHZ second
	250	*
	251	* comp_t is a psuedo-floating point number with 13 bits of
	252	* mantissa and 3 bits of base 8 exponent and has resolution
	253	* of 1/AHZ seconds.
	254	*
	255	* notice I already converted the incoming values into microseconds
	256	* I need to convert back into AHZ ticks.
	257	*/
	258
	259	/* Mark Tinguely (tinguely@plains.NoDak.edu) 8/10/93 */
	260
	261
262	#define RES 13
263	#define EXP 3
264	#define MAXFRACT 1<<RES
265
266	comp_t
267	int2comp(mantissa)
268	unsigned int mantissa;
269	{
270	comp_t exp=0;
271
272	mantissa = mantissa * AHZ / 1000000; /* convert back to AHZ ticks */
273	while (mantissa > MAXFRACT) {
274	mantissa >>= EXP; /* base 8 exponent */
275	exp++;
276	}
277	exp <<= RES; /* move the exponent */
278	exp += mantissa; /* add on the manissa */
279	return (exp);
15637ed4	280	}