mom_mach.c

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/*
*         OpenPBS (Portable Batch System) v2.3 Software License
* 
* Copyright (c) 1999-2002 Veridian Information Solutions, Inc.
* All rights reserved.
* 
* ---------------------------------------------------------------------------
* For a license to use or redistribute the OpenPBS software under conditions
* other than those described below, or to purchase support for this software,
* please contact Veridian Systems, PBS Products Department ("Licensor") at:
* 
*    www.OpenPBS.org  [phone]                  [e-mail]
*                        877 902-4PBS (US toll-free)
* ---------------------------------------------------------------------------
* 
* This license covers use of the OpenPBS v2.3 software (the "Software") at
* your site or location, and, for certain users, redistribution of the
* Software to other sites and locations.  Use and redistribution of
* OpenPBS v2.3 in source and binary forms, with or without modification,
* are permitted provided that all of the following conditions are met.
* After December 31, 2003, only conditions 3-6 must be met:
* 
* 1. Commercial and/or non-commercial use of the Software is permitted
*    provided a current software registration is on file at www.OpenPBS.org.
*    If use of this software contributes to a publication, product, or
*    service, proper attribution must be given; see www.OpenPBS.org/credit.html
* 
* 2. Redistribution in any form is only permitted for non-commercial,
*    non-profit purposes.  There can be no charge for the Software or any
*    software incorporating the Software.  Further, there can be no
*    expectation of revenue generated as a consequence of redistributing
*    the Software.
* 
* 3. Any Redistribution of source code must retain the above copyright notice
*    and the acknowledgment contained in paragraph 6, this list of conditions
*    and the disclaimer contained in paragraph 7.
* 
* 4. Any Redistribution in binary form must reproduce the above copyright
*    notice and the acknowledgment contained in paragraph 6, this list of
*    conditions and the disclaimer contained in paragraph 7 in the
*    documentation and/or other materials provided with the distribution.
* 
* 5. Redistributions in any form must be accompanied by information on how to
*    obtain complete source code for the OpenPBS software and any
*    modifications and/or additions to the OpenPBS software.  The source code
*    must either be included in the distribution or be available for no more
*    than the cost of distribution plus a nominal fee, and all modifications
*    and additions to the Software must be freely redistributable by any party
*    (including Licensor) without restriction.
* 
* 6. All advertising materials mentioning features or use of the Software must
*    display the following acknowledgment:
* 
*     "This product includes software developed by NASA Ames Research Center,
*     Lawrence Livermore National Laboratory, and Veridian Information 
*     Solutions, Inc.
*     Visit www.OpenPBS.org for OpenPBS software support,
*     products, and information."
* 
* 7. DISCLAIMER OF WARRANTY
* 
* THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT
* ARE EXPRESSLY DISCLAIMED.
* 
* IN NO EVENT SHALL VERIDIAN CORPORATION, ITS AFFILIATED COMPANIES, OR THE
* U.S. GOVERNMENT OR ANY OF ITS AGENCIES BE LIABLE FOR ANY DIRECT OR 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.
* 
* This license will be governed by the laws of the Commonwealth of Virginia,
* without reference to its choice of law rules.
*/
#include <pbs_config.h>   /* the master config generated by configure */

#include <assert.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <ctype.h>
#include <procinfo.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <strings.h>
#include <sys/time.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <pwd.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/vminfo.h>
#include <sys/stream.h>
#include <sys/stropts.h>
#include <nlist.h>
#if defined ( _AIX43 )
#include <cf.h>
#include <sys/cfgodm.h>
#endif	/* AIX43 */


#include "pbs_error.h"
#include "portability.h"
#include "list_link.h"
#include "server_limits.h"
#include "attribute.h"
#include "resource.h"
#include "job.h"
#include "log.h"
#include "resmon.h"
#include "../rm_dep.h"
#include "mom_mach.h"

/*
**	System dependent code to gather information for the resource
**	monitor for an IBM 590 running AIX4.
**
**	Resources known by this code:
**		cput		cpu time for a pid or session
**		mem		memory size for a pid or session in KB
**		ncpus		number of cpus 
**		resi		resident memory size for a pid or session in KB
**		sessions	list of sessions in the system
**		pids		list of pids in a session
**		nsessions	number of sessions in the system
**		nusers		number of users in the system
**		totmem		total memory size in KB
**		availmem	available memory size in KB
**		size		size of a file or filesystem in KB
**		idletime	seconds of idle time
**		walltime	wall clock time for a pid
**		loadave		current load average
**
*/

static char ident[] = "@(#) aix4/$RCSfile: mom_mach.c,v $ $Revision: 2.11.2.1.2.10 $";

#ifndef TRUE
#define FALSE	0
#define TRUE	1
#endif	/* TRUE */



/*
** external functions and data
*/
extern	struct	config		*search A_((struct config *, char *));
extern	struct	rm_attribute	*momgetattr A_((char *));
extern	int			rm_errno;
extern	unsigned	int	reqnum;
extern	char	*ret_string;
extern 	double	 cputfactor;
extern	double	 wallfactor;

/*
** local functions
*/
static char	*resi		A_((struct rm_attribute *attrib));
static char	*totmem		A_((struct rm_attribute *attrib));
static char	*physmem	A_((struct rm_attribute *attrib));
static char	*availmem	A_((struct rm_attribute *attrib));
static char	*walltime	A_((struct rm_attribute *attrib));
static char	*ncpus		A_((struct rm_attribute *attrib));

extern char	*loadave	A_((struct rm_attribute *attrib));
extern char	*nullproc	A_((struct rm_attribute *attrib));

/*
** local resource list storage
*/
struct	config	dependent_config[] = {
	{ "resi",	resi },
	{ "totmem",	totmem },
	{ "physmem",	physmem },
	{ "availmem",	availmem },
	{ "loadave",	loadave },
	{ "ncpus",	ncpus },
	{ "walltime",	walltime },
	{ NULL,		nullproc },
};
	
struct nlist nl[] = {
	{ "avenrun" }
};

#define	KSYM_LOAD	0
#define	ASIZE		10

time_t			wait_time = 10;
int			kd = -1;
int			proctot = 0;
struct	procsinfo	*proc_tbl = NULL;
char			**swap_dev = NULL;
int			nproc = 0;
static int		nncpus;
static uint	 	realmem;
static long		page_size;

extern	struct	pbs_err_to_txt	pbs_err_to_txt[];
extern	time_t			time_now;

extern	char	extra_parm[];
extern	char	no_parm[];
char		nokernel[] = "kernel not available";
char		noproc[] = "process %d does not exist";


void
dep_initialize()
{
	char	*id = "dep_initialize";
	int	i, rc, len;
	char	line[200], *dev;
	char	*swapfil = "/etc/swapspaces";
	FILE	*fil;
#if defined( _AIX43 )
	struct CuAt * obj;
	int	      qty;
#else	/* AIX43 */
	struct	nlist ndata;
#endif	/* AIX43 */

	if (swap_dev == NULL)
		swap_dev = (char **)calloc(10, sizeof(char *));

	page_size = sysconf(_SC_PAGESIZE);

	if ((fil = fopen(swapfil, "r")) == NULL)
		log_err(errno, id, swapfil);
	else {
		for (i=0; fgets(line, sizeof(line), fil);) {
			if (line[0] == '*')
				continue;
			len = strlen(line);
			if (line[len-1] == '\n')
				line[--len] = '\0';
			if ((dev = strstr(line, "/dev/")) == NULL)
				continue;
			DBPRT(("%s: swapdev(%d) %s\n", id, i, dev))
			swap_dev = realloc(swap_dev, (i+2)*sizeof(char *));
			swap_dev[i++] = strdup(dev);
		}
		swap_dev[i] = NULL;
		fclose(fil);
	}

	if ((kd = open("/dev/kmem", O_RDONLY)) == -1) {
		log_err(errno, id, "open");
		return;
	}

	/* insure /dev/kmem closed on exec */

	if ((i = fcntl(kd,  F_GETFD)) == -1) {
		log_err(errno, id, "F_GETFD");
	}
	i |= FD_CLOEXEC;
	if (fcntl(kd, F_SETFD, i) == -1) {
		log_err(errno, id, "F_SETFD");
	}

	proc_tbl = malloc(ASIZE*sizeof(struct procsinfo));
	proctot = ASIZE;

	rc = knlist(nl, sizeof(nl)/sizeof(struct nlist), sizeof(struct nlist));
	if (rc == -1) {
		log_err(errno, id, "knlist");
		return;
	}
#ifdef	DEBUG
	for (i=0; i<sizeof(nl)/sizeof(struct nlist); i++)
		printf("%s: %s @ %x\n", id, nl[i].n_name, nl[i].n_value);
#endif

#if defined( _AIX43 )
/* The following code works for AIX 4.3
 * Supplied by Lloyd Caldwell, U of Utah
 */
	if ( odm_initialize() == 0 ) {
		obj = getattr( "sys0", "realmem", 0, &qty ) ;
		if ( obj == NULL )
			log_err(odmerrno, id, "odm_initialize");
		else
			realmem = atoi(obj->value);	/* in KB */
		if ( odm_terminate() )
			log_err(odmerrno, id, "odm_terminate for realmem");
	} else {
		log_err(odmerrno, id, "odm_initialize for realmem");
	}
#else	/* ! AIX43 */
/*
 * This code works for AIX 4.1 and 4.2
 * The size of real memory is stored in the 10th location (uint big each)
 * of undocumented kernel structure "vmker".
 *
 * Author: Wendy Lin, PUCC, May 1998
 */

	ndata.n_name = "vmker";
	if ( (knlist(&ndata, 1, sizeof(struct nlist)) == -1) ||
	     (kvm_read(kd, ndata.n_value + sizeof(uint) * 9, &realmem, sizeof (realmem)) != sizeof(realmem)) ) {
		log_err(errno, id, "kvm_read of realmem");
		realmem = 0;
	} else {
	 	realmem = realmem * 4;	/* now in KB */
	}
#endif	/* AIX43 */


	nncpus = sysconf(_SC_NPROCESSORS_ONLN);
	return;
}

void
dep_cleanup()
{
	char	*id = "dep_cleanup";
	int	i;

	log_record(PBSEVENT_SYSTEM, 0, id, "dependent cleanup");
	close(kd);
	kd = -1;

	if (proc_tbl) {
		free(proc_tbl);
		proc_tbl = NULL;
	}

	if (swap_dev) {
		for (i=0; swap_dev[i]; i++) {
			free(swap_dev[i]);
			swap_dev[i] = NULL;
		}
	}
}

void
end_proc()
{
	return;
}

/*
 * Time decoding macro.  Accepts a timeval structure.  Returns unsigned long
 * time in seconds.
 */

#define tv(val) (ulong)((val).tv_sec)

/*
 * Internal size decoding routine.
 *
 *	Accepts a resource pointer and a pointer to the unsigned long integer
 *	to receive the decoded value.  It returns a PBS error code, and the
 *	decoded value in the unsigned long integer.
 *
 *	For AIX,
 *
 *		sizeof(word) = sizeof(int)
 */

static int getsize(pres, ret)
    resource		*pres;
    unsigned long	*ret;
{
	unsigned long	value;

	if (pres->rs_value.at_type != ATR_TYPE_SIZE)
		return (PBSE_ATTRTYPE);
	value = pres->rs_value.at_val.at_size.atsv_num;
	if (pres->rs_value.at_val.at_size.atsv_units ==
	    ATR_SV_WORDSZ) {
		if (value > ULONG_MAX / sizeof(int))
			return (PBSE_BADATVAL);
		value *= sizeof(int);
	}
	if (value > ULONG_MAX >>
	    pres->rs_value.at_val.at_size.atsv_shift)
	        return (PBSE_BADATVAL);
	*ret = value << pres->rs_value.at_val.at_size.atsv_shift;

	return (PBSE_NONE);
}

/*
 * Internal time decoding routine.
 *
 *	Accepts a resource pointer and a pointer to the unsigned long integer
 *	to receive the decoded value.  It returns a PBS error code, and the
 *	decoded value of time in seconds in the unsigned long integer.
 */

static int gettime(pres, ret)
    resource		*pres;
    unsigned long	*ret;
{

	if (pres->rs_value.at_type != ATR_TYPE_LONG)
		return (PBSE_ATTRTYPE);
	if (pres->rs_value.at_val.at_long < 0)
	        return (PBSE_BADATVAL);
	*ret = pres->rs_value.at_val.at_long;

	return (PBSE_NONE);
}

static
int
injob(pjob, sesid)
    job			*pjob;
    pid_t		sesid;
{
	task		*ptask;

	for (ptask = (task *)GET_NEXT(pjob->ji_tasks);
			ptask;
			ptask = (task *)GET_NEXT(ptask->ti_jobtask)) {
		if (ptask->ti_qs.ti_sid <= 1)
			continue;
		if (ptask->ti_qs.ti_sid == sesid)
			return TRUE;
	}
	return FALSE;
}

/*
 * Internal session cpu time decoding routine.
 *
 *	Accepts a session id.  Returns the sum of all cpu time consumed for all
 *	tasks executed by the job, in seconds, adjusted by cputfactor.
 */
static unsigned long cput_sum(pjob)
    job		*pjob;
{
	char			*id = "cput_ses";
	int			i;
	unsigned long		cputime;
	int			nps = 0;

	cputime = 0;
	for (i=0; i<nproc; i++) {
		register struct procsinfo	*pp = &proc_tbl[i];

		if (pp->pi_state == SNONE)
			continue;

		if (!injob(pjob, pp->pi_sid))
			continue;

		nps++;
		DBPRT(("%s: pid=%d", id, pp->pi_pid))
		if (pp->pi_state == SZOMB) {
			DBPRT((" (zombie)"))
			cputime +=  (pp->pi_utime + pp->pi_stime);
		}
		else {
			DBPRT((" (active)"))
			cputime += tv(pp->pi_ru.ru_utime) +
				tv(pp->pi_ru.ru_stime) +
				tv(pp->pi_cru.ru_utime) +
				tv(pp->pi_cru.ru_stime);
		}
		DBPRT((" total=%lu\n", cputime))

	}

	if (nps == 0)
		pjob->ji_flags |= MOM_NO_PROC;

	return ((unsigned long)((double)cputime * cputfactor));
}

/*
 * Internal session memory usage function.
 *
 *	Accepts a session ID.  Returns the total number of bytes of address
 *	space consumed by all current tasks within the job.
 */
static unsigned long mem_sum(pjob)
    job			*pjob;
{
	char		*id="mem_ses";
	int		i;
	unsigned long	memsize;

	memsize = 0;
	for (i=0; i<nproc; i++) {
		register struct procsinfo	*pp = &proc_tbl[i];

		if (pp->pi_state == SNONE)
			continue;

		if (!injob(pjob, pp->pi_sid))
			continue;

		memsize += ctob(pp->pi_size);
		DBPRT(("%s: pid=%d size=%lu\n", id, pp->pi_pid, memsize))
	}

	return (memsize);
}

/*
 * Internal session mem (workingset) size function.
 */
static unsigned long resi_sum(pjob)
    job			*pjob;
{
	char		*id="resi_ses";
	int		i;
	unsigned long	memsize;

	memsize = 0;
	for (i=0; i<nproc; i++) {
		struct	procsinfo	*pp = &proc_tbl[i];

		if (pp->pi_state == SNONE)
			continue;

		if (!injob(pjob, pp->pi_sid))
			continue;

		if (pp->pi_state == SZOMB)
			continue;

		memsize += (pp->pi_drss == -1) ? 0 : ctob(pp->pi_drss);
		memsize += (pp->pi_trss == -1) ? 0 : ctob(pp->pi_trss);
		DBPRT(("%s: pid=%d size=%lu\n", id, pp->pi_pid, memsize))
	}

	return (memsize);
}

/*
 * Return TRUE if any process in the job is over limit for memory usage.
 */
static int overmem_proc(pjob, limit)
    job			*pjob;
    unsigned long	limit;
{
	int		i;

	for (i=0; i<nproc; i++) {
		register struct procsinfo	*pp = &proc_tbl[i];

		if (pp->pi_state == SNONE)
			continue;

		if (!injob(pjob, pp->pi_sid))
			continue;

		if (ctob(pp->pi_size) > limit)
			return (TRUE);
	}

	return (FALSE);
}

extern char *msg_momsetlim;

/*
 * Internal error routine
 */
int error(string, value)
    char	*string;
    int		value;
{
	int		i = 0;
	char		*message;

	assert(string != NULL);
	assert(*string != '\0');
	assert(value > PBSE_);			/* minimum PBS error number */
	assert(value <= PBSE_NOSYNCMSTR);	/* maximum PBS error number */
	assert(pbs_err_to_txt[i].err_no != 0);

	do {
		if (pbs_err_to_txt[i].err_no == value)
			break;
	} while (pbs_err_to_txt[++i].err_no != 0);

	assert(pbs_err_to_txt[i].err_txt != NULL);
	message = *pbs_err_to_txt[i].err_txt;
	assert(message != NULL);
	assert(*message != '\0');
	(void)fprintf(stderr, msg_momsetlim, string, message);
	(void)fflush(stderr);

	return (value);
}

/*
 * Establish system-enforced limits for the job.
 *
 *	Run through the resource list, checking the values for all items
 *	we recognize.
 *
 *	If set_mode is SET_LIMIT_SET, then also set hard limits for the
 *	system enforced limits (not-polled).
 *	If anything goes wrong with the process, return a PBS error code
 *	and print a message on standard error.  A zero-length resource list
 *	is not an error.
 *
 *	If set_mode is SET_LIMIT_SET the entry conditions are:
 *	    1.	MOM has already forked, and we are called from the child.
 *	    2.	The child is still running as root.
 *	    3.  Standard error is open to the user's file.
 *
 *	If set_mode is SET_LIMIT_ALTER, we are beening called to modify
 *	existing limits.  Cannot alter those set by setrlimit (kernel)
 *	because we are the wrong process.  
 */
int mom_set_limits(pjob, set_mode)
    job			*pjob;
    int			 set_mode;	/* SET_LIMIT_SET or SET_LIMIT_ALTER */
{
	char		*id = "mom_set_limits";
	char		*pname;
	int		retval;
	unsigned long	value;	/* place in which to build resource value */
	resource	*pres;
       	struct rlimit	reslim;
	unsigned long	mem_limit  = 0;

	DBPRT(("%s: entered\n", id))
	assert(pjob != NULL);
	assert(pjob->ji_wattr[(int)JOB_ATR_resource].at_type == ATR_TYPE_RESC);
	pres = (resource *)
	    GET_NEXT(pjob->ji_wattr[(int)JOB_ATR_resource].at_val.at_list);

/*
 * Cycle through all the resource specifications,
 * setting limits appropriately.
 */

	while (pres != NULL) {
		assert(pres->rs_defin != NULL);
		pname = pres->rs_defin->rs_name;
		assert(pname != NULL);
		assert(*pname != '\0');

		if (strcmp(pname, "cput") == 0) {
			/* cpu time - check, if less than pcput use it */
			retval = gettime(pres, &value);
			if (retval != PBSE_NONE)
			        return (error(pname, retval));
		} else if (strcmp(pname, "pcput") == 0) {
			/* process cpu time - set */
			retval = gettime(pres, &value);
			if (retval != PBSE_NONE)
			        return (error(pname, retval));
			reslim.rlim_cur = reslim.rlim_max = 
				(unsigned long)((double)value / cputfactor);
			if (setrlimit(RLIMIT_CPU, &reslim) < 0)
	        		return (error("RLIMIT_CPU", PBSE_SYSTEM));
		} else if (strcmp(pname, "file") == 0) {	/* set */
			if (set_mode == SET_LIMIT_SET)  {
			    retval = getsize(pres, &value);
			    if (retval != PBSE_NONE)
			        return (error(pname, retval));
			    if (value > INT_MAX)
			        return (error(pname, PBSE_BADATVAL));
			    reslim.rlim_cur = reslim.rlim_max = value;
			    if (setrlimit(RLIMIT_FSIZE, &reslim) < 0)
			        return (error(pname, PBSE_SYSTEM));
			}
		} else if (strcmp(pname, "vmem") == 0) {	/* check */
			retval = getsize(pres, &value);