mom_mach.c

openPBS的开放源代码

/*
*         OpenPBS (Portable Batch System) v2.3 Software License
* 
* Copyright (c) 1999-2000 Veridian Information Solutions, Inc.
* All rights reserved.
* 
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* please contact Veridian Systems, PBS Products Department ("Licensor") at:
* 
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*                        877 902-4PBS (US toll-free)
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* 
* 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,
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* 
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/*
**	System dependent code to gather information for a Sun machine.
**
**	Resources known by this code:
**		cput		cpu time for a pid or session
**		mem		memory size for a pid or session in KB
**		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
**		physmem		physical 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
**		quota		quota information
*/

#include <pbs_config.h>   /* the master config generated by configure */

#include	<assert.h>
#include	<limits.h>
#include	<stdio.h>
#include	<stdlib.h>
#include	<ctype.h>
#include	<dirent.h>
#include	<string.h>
#include	<fcntl.h>
#include	<errno.h>
#include	<pwd.h>
#include	<fstab.h>
#include	<kvm.h>
#include	<sys/types.h>
#include	<sys/time.h>
#include	<sys/param.h>
#include	<sys/resource.h>
#include	<sys/mount.h>
#include	<sys/file.h>
#include	<sys/stat.h>
#include	<sys/user.h>
#include	<sys/uio.h>
#include	<sys/proc.h>
#include	<sys/vnode.h>
#include	<sys/sysctl.h>
#include	<sys/vmmeter.h>
#include	<ufs/ufs/quota.h>
#include	<vm/vm_map.h>

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

static char ident[] = "@(#) netbsd/$RCSfile: mom_mach.c,v $ $Revision: 2.7.4.4 $";

#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	double	cputfactor;
extern	double	wallfactor;

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

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

struct	config	dependent_config[] = {
	{ "resi", resi },
	{ "physmem", physmem },
	{ "loadave", loadave },
	{ "walltime", walltime },
	{ "quota", quota },
	{ NULL, nullproc }
};

time_t			wait_time = 10;
kvm_t			*kd = NULL;
struct	kinfo_proc	*proc_tbl = NULL;
pid_t			*sess_tbl = NULL;
int			nproc = 0;
extern	char		*ret_string;
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";

	if (kd == NULL) {
		kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "resmom");
		if (kd == NULL) {
			log_err(errno, id, "kvm_open");
			return;
		}
	}

	return;
}

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

	log_record(PBSEVENT_SYSTEM, 0, id, "dependent cleanup");
	if (kd)
		kvm_close(kd);
	kd = NULL;
}

void
end_proc()
{
	return;
}

extern	struct	pbs_err_to_txt	pbs_err_to_txt[];
extern	time_t			time_now;

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

#define tv(val) ((val).tv_sec + ((unsigned long)(val).tv_usec + 500000)/1000000)

/*
 * 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 SunOS,
 *
 *		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 milliseconds 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);
}

/*
**	Scan a list of tasks and return true if one of them matches
**	the process (sid or pid) represented by *psp.
*/
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;
}

#define	MINPROC	10
#define	MAXPROC	10000

/*
 * Internal session cpu time decoding routine.
 *
 *	Accepts a job 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_sum";
	int			i;
	u_long			cputime;
	int			nps = 0;

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

		if (!injob(pjob, sess_tbl[i]))
			continue;

		nps++;
		cputime += tv(pp->kp_proc.p_rtime);

		if (pp->kp_proc.p_ru == NULL) {
			struct	pstats	ps;

			if (pp->kp_proc.p_stats == NULL)
				continue;

			if (kvm_read(kd, (u_long)pp->kp_proc.p_stats, &ps,
					sizeof(ps)) != sizeof(ps)) {
				log_err(errno, id, "kvm_read(pstats)");
				continue;
			}
			cputime += tv(ps.p_ru.ru_utime) +
				tv(ps.p_ru.ru_stime) +
				tv(ps.p_cru.ru_utime) +
				tv(ps.p_cru.ru_stime);
		}
		else {
			struct	rusage	ru;

			if (kvm_read(kd, (u_long)pp->kp_proc.p_ru, &ru,
					sizeof(ru)) != sizeof(ru)) {
				log_err(errno, id, "kvm_read(session)");
				continue;
			}
			cputime += tv(ru.ru_utime) + tv(ru.ru_stime);
		}
		DBPRT(("%s: ses %d pid %d cputime %d\n", id,
				sess_tbl[i], pp->kp_proc.p_pid, cputime))
	}

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

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

/*
 * Internal session memory usage function.
 *
 *	Accepts a job 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_sum";
	int		i;
	unsigned long	memsize;

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

		if (!injob(pjob, sess_tbl[i]))
			continue;

		memsize += ctob(pp->kp_eproc.e_vm.vm_tsize +
			pp->kp_eproc.e_vm.vm_dsize +
			pp->kp_eproc.e_vm.vm_ssize);
		DBPRT(("%s: ses %d pid=%d totmem=%lu\n", id,
		       sess_tbl[i], pp->kp_proc.p_pid, memsize))
	}

	return (memsize);
}

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

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

		if (!injob(pjob, sess_tbl[i]))
			continue;

		memsize += ctob(pp->kp_eproc.e_vm.vm_rssize);
		DBPRT(("%s: pid=%d ses=%d mem=%d totmem=%d\n", id,
			pp->kp_proc.p_pid, sess_tbl[i],
			pp->kp_eproc.e_vm.vm_rssize, memsize))
	}

	return (memsize);
}

/*
 * Return TRUE if any task 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++) {
		struct kinfo_proc	*pp = &proc_tbl[i];

		if (!injob(pjob, sess_tbl[i]))
			continue;

		if (ctob(pp->kp_eproc.e_vm.vm_tsize +
				pp->kp_eproc.e_vm.vm_dsize +
				pp->kp_eproc.e_vm.vm_ssize) > 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.