OpenSolaris_b135/cmd/dispadmin/fssdispadmin.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/fss.h>
#include <sys/priocntl.h>
#include <sys/fsspriocntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "dispadmin.h"
/*
* This file contains the class specific code implementing the fair-share
* scheduler dispadmin sub-command.
*/
#define BASENMSZ 16
extern char *basename();
static void getadmin(), setadmin();
static char usage[] = "usage: dispadmin -l\n"
"dispadmin -c FSS -g [-r res]\n"
"dispadmin -c FSS -s infile\n";
static char basenm[BASENMSZ];
static char cmdpath[256];
int
main(int argc, char **argv)
{
int c;
int lflag, gflag, rflag, sflag;
ulong_t res;
char *infile;
char *endp;
(void) strcpy(cmdpath, argv[0]);
(void) strcpy(basenm, basename(argv[0]));
lflag = gflag = rflag = sflag = 0;
while ((c = getopt(argc, argv, "lc:gr:s:")) != -1) {
switch (c) {
case 'l':
lflag++;
break;
case 'c':
if (strcmp(optarg, "FSS") != 0)
fatalerr("error: %s executed for %s class, "
"%s is actually sub-command for FSS "
"class\n", cmdpath, optarg, cmdpath);
break;
case 'g':
gflag++;
break;
case 'r':
rflag++;
errno = 0;
res = strtoul(optarg, &endp, 10);
if (res == 0 || errno != 0 || *endp != '\0')
fatalerr("%s: Can't convert to requested "
"resolution\n", basenm);
break;
case 's':
sflag++;
infile = optarg;
break;
case '?':
fatalerr(usage);
default:
break;
}
}
if (lflag) {
if (gflag || rflag || sflag)
fatalerr(usage);
(void) printf("FSS\t(Fair Share)\n");
return (0);
} else if (gflag) {
if (lflag || sflag)
fatalerr(usage);
if (rflag == 0)
res = 1000;
getadmin(res);
return (0);
} else if (sflag) {
if (lflag || gflag || rflag)
fatalerr(usage);
setadmin(infile);
return (0);
} else {
fatalerr(usage);
}
return (1);
}
/*
* Retrieve the current settings from kernel, convert the time quantum
* value to the resolution specified by res and print out the results.
*/
static void
getadmin(ulong_t res)
{
pcinfo_t pcinfo;
pcadmin_t pcadmin;
fssadmin_t fssadmin;
hrtimer_t hrtime;
long fss_quantum;
(void) strcpy(pcinfo.pc_clname, "FSS");
if (priocntl(0, 0, PC_GETCID, (caddr_t)&pcinfo) == -1)
fatalerr("%s: Can't get FSS class ID, priocntl system call "
"failed (%s)\n", basenm, strerror(errno));
pcadmin.pc_cid = pcinfo.pc_cid;
pcadmin.pc_cladmin = (char *)&fssadmin;
fssadmin.fss_cmd = FSS_GETADMIN;
if (priocntl(0, 0, PC_ADMIN, (caddr_t)&pcadmin) == -1)
fatalerr("%s: Can't get scheduler configuration, priocntl "
"system call failed (%s)\n", basenm, strerror(errno));
hrtime.hrt_secs = 0;
hrtime.hrt_rem = fssadmin.fss_quantum;
hrtime.hrt_res = HZ;
if (_hrtnewres(&hrtime, res, HRT_RNDUP) == -1)
fatalerr("%s: Can't convert to requested resolution\n", basenm);
if ((fss_quantum = hrtconvert(&hrtime)) == -1)
fatalerr("%s: Can't express time quantum in "
"requested resolution,\n"
"try coarser resolution\n", basenm);
(void) printf("#\n# Fair Share Scheduler Configuration\n#\n");
(void) printf("RES=%ld\n", res);
(void) printf("#\n# Time Quantum\n#\n");
(void) printf("QUANTUM=%ld\n", fss_quantum);
}
/*
* Read the scheduler settings from infile, convert the time quantum values
* to HZ resolution, do a little sanity checking and overwrite kernel settings
* with the values from the file.
*/
static void
setadmin(char *infile)
{
int i;
pcinfo_t pcinfo;
pcadmin_t pcadmin;
fssadmin_t fssadmin;
int line;
ulong_t res;
long fss_quantum;
hrtimer_t hrtime;
FILE *fp;
char buf[512];
char *endp;
int nparams = 0;
(void) strcpy(pcinfo.pc_clname, "FSS");
if (priocntl(0, 0, PC_GETCID, (caddr_t)&pcinfo) == -1)
fatalerr("%s: Can't get FSS class ID, priocntl system call "
"failed (%s)\n", basenm, strerror(errno));
if ((fp = fopen(infile, "r")) == NULL)
fatalerr("%s: Can't open %s for input\n", basenm, infile);
for (line = 1; fgets(buf, sizeof (buf), fp) != NULL; line++) {
char name[512], value[512];
int len;
if (buf[0] == '#' || buf[0] == '\n')
continue;
/*
* Look for "name=value", with optional whitespaces on either
* side, terminated by a newline, and consuming the whole line.
*/
/* LINTED - unbounded string specifier */
if (sscanf(buf, " %[^=]=%s \n%n", name, value, &len) == 2 &&
name[0] != '\0' && value[0] != '\0' && len == strlen(buf)) {
if (strcmp(name, "RES") == 0) {
errno = 0;
i = (int)strtol(value, &endp, 10);
if (errno != 0 || endp == value ||
i < 0 || *endp != '\0')
fatalerr("%s, line %d: illegal "
"resolution value\n", infile, line);
else
res = i;
nparams++;
} else if (strcmp(name, "QUANTUM") == 0) {
errno = 0;
i = (int)strtol(value, &endp, 10);
if (errno != 0 || endp == value ||
i < 0 || *endp != '\0')
fatalerr("%s, line %d: illegal time "
"quantum value\n", infile, line);
else
fss_quantum = i;
nparams++;
} else {
fatalerr("%s, line %d: invalid token\n",
infile, line);
}
} else {
fatalerr("%s, line %d: syntax error\n", infile, line);
}
}
if (line == 1 || nparams < 2)
fatalerr("cannot read settings from %s\n", infile);
if (res != HZ) {
hrtime.hrt_secs = 0;
hrtime.hrt_rem = fss_quantum;
hrtime.hrt_res = res;
if (_hrtnewres(&hrtime, HZ, HRT_RNDUP) == -1)
fatalerr("%s: Can't convert specified "
"resolution to ticks\n", basenm);
if ((fssadmin.fss_quantum = hrtconvert(&hrtime)) == -1)
fatalerr("%s, line %d: time quantum value out of "
"valid range\n", infile, line);
} else {
fssadmin.fss_quantum = (short)fss_quantum;
}
pcadmin.pc_cid = pcinfo.pc_cid;
pcadmin.pc_cladmin = (char *)&fssadmin;
fssadmin.fss_cmd = FSS_SETADMIN;
if (priocntl(0, 0, PC_ADMIN, (caddr_t)&pcadmin) == -1)
fatalerr("%s: Can't set scheduler parameters, priocntl "
"system call failed (%s)\n", basenm, strerror(errno));
}