OpenSolaris_b135/cmd/priocntl/fsspriocntl.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/procset.h>
#include <sys/priocntl.h>
#include <sys/fsspriocntl.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <libgen.h>
#include <limits.h>
#include <errno.h>
#include "priocntl.h"
/*
* This file contains the class specific code implementing the fair-share
* scheduler priocntl sub-command.
*/
#define ADDKEYVAL(p, k, v) { (p[0]) = (k); (p[1]) = (v); p += 2; }
#define FSS_KEYCNT 2 /* max number of (key, value) pairs */
/*
* Control flags
*/
#define FSS_DOUPRILIM 0x01 /* user priority limit */
#define FSS_DOUPRI 0x02 /* user priority */
static void print_fssinfo(void);
static int print_fssprocs(void);
static int fss_priocntl(idtype_t, id_t, int, char *, uintptr_t *);
static int set_fssprocs(idtype_t, int, char **, uint_t, pri_t, pri_t);
static void exec_fsscmd(char **, uint_t, pri_t, pri_t);
static char usage[] =
"usage: priocntl -l\n"
" priocntl -d [-d idtype] [idlist]\n"
" priocntl -s [-c FSS] [-m fssuprilim] [-p fssupri] [-i idtype] "
"[idlist]\n"
" priocntl -e [-c FSS] [-m fssuprilim] [-p fssupri] command [argument(s)]"
"\n";
static char cmdpath[MAXPATHLEN];
static char basenm[BASENMSZ];
int
main(int argc, char *argv[])
{
int c;
int lflag, dflag, sflag, mflag, pflag, eflag, iflag;
pri_t fssuprilim;
pri_t fssupri;
char *idtypnm;
idtype_t idtype;
int idargc;
uint_t cflags;
(void) strlcpy(cmdpath, argv[0], MAXPATHLEN);
(void) strlcpy(basenm, basename(argv[0]), BASENMSZ);
lflag = dflag = sflag = mflag = pflag = eflag = iflag = 0;
while ((c = getopt(argc, argv, "ldsm:p:ec:i:")) != -1) {
switch (c) {
case 'l':
lflag++;
break;
case 'd':
dflag++;
break;
case 's':
sflag++;
break;
case 'm':
mflag++;
fssuprilim = (pri_t)str2num(optarg, SHRT_MIN, SHRT_MAX);
if (errno)
fatalerr("%s: Specified user priority limit %s "
"out of configured range\n",
basenm, optarg);
break;
case 'p':
pflag++;
fssupri = (pri_t)str2num(optarg, SHRT_MIN, SHRT_MAX);
if (errno)
fatalerr("%s: Specified user priority %s "
"out of configured range\n",
basenm, optarg);
break;
case 'e':
eflag++;
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 'i':
iflag++;
idtypnm = optarg;
break;
case '?':
fatalerr(usage);
default:
break;
}
}
if (lflag) {
if (dflag || sflag || mflag || pflag || eflag || iflag)
fatalerr(usage);
print_fssinfo();
} else if (dflag) {
if (lflag || sflag || mflag || pflag || eflag)
fatalerr(usage);
return (print_fssprocs());
} else if (sflag) {
if (lflag || dflag || eflag)
fatalerr(usage);
if (iflag) {
if (str2idtyp(idtypnm, &idtype) == -1)
fatalerr("%s: Bad idtype %s\n", basenm,
idtypnm);
} else {
idtype = P_PID;
}
cflags = (pflag ? FSS_DOUPRI : 0);
if (mflag)
cflags |= FSS_DOUPRILIM;
if (optind < argc)
idargc = argc - optind;
else
idargc = 0;
return (set_fssprocs(idtype, idargc, &argv[optind], cflags,
fssuprilim, fssupri));
} else if (eflag) {
if (lflag || dflag || sflag || iflag)
fatalerr(usage);
cflags = (pflag ? FSS_DOUPRI : 0);
if (mflag)
cflags |= FSS_DOUPRILIM;
exec_fsscmd(&argv[optind], cflags, fssuprilim, fssupri);
} else {
fatalerr(usage);
}
return (0);
}
/*
* Print our class name and the configured user priority range.
*/
static void
print_fssinfo(void)
{
pcinfo_t pcinfo;
(void) strcpy(pcinfo.pc_clname, "FSS");
(void) printf("FSS (Fair Share)\n");
if (priocntl(0, 0, PC_GETCID, (caddr_t)&pcinfo) == -1)
fatalerr("\tCan't get configured FSS user priority range\n");
(void) printf("\tConfigured FSS User Priority Range: -%d through %d\n",
((fssinfo_t *)pcinfo.pc_clinfo)->fss_maxupri,
((fssinfo_t *)pcinfo.pc_clinfo)->fss_maxupri);
}
/*
* Read a list of pids from stdin and print the user priority and user
* priority limit for each of the corresponding processes.
*/
static int
print_fssprocs(void)
{
pid_t *pidlist;
size_t numread;
int i;
char clname[PC_CLNMSZ];
pri_t fssuprilim;
pri_t fssupri;
int error = 0;
/*
* Read a list of pids from stdin.
*/
if ((pidlist = read_pidlist(&numread, stdin)) == NULL)
fatalerr("%s: Can't read pidlist.\n", basenm);
(void) printf("FAIR SHARING PROCESSES:\n"
" PID FSSUPRILIM FSSUPRI\n");
if (numread == 0)
fatalerr("%s: No pids on input\n", basenm);
for (i = 0; i < numread; i++) {
(void) printf("%7ld", pidlist[i]);
if (priocntl(P_PID, pidlist[i], PC_GETXPARMS, "FSS",
FSS_KY_UPRI, &fssupri,
FSS_KY_UPRILIM, &fssuprilim, 0) != -1) {
(void) printf(" %5d %5d\n",
fssuprilim, fssupri);
} else {
error = 1;
if (priocntl(P_PID, pidlist[i], PC_GETXPARMS, NULL,
PC_KY_CLNAME, clname, 0) == -1 &&
strcmp(clname, "FSS"))
/*
* Process from some class other than fair
* sharing. It has probably changed class while
* priocntl command was executing (otherwise
* we wouldn't have been passed its pid).
* Print the little we know about it.
*/
(void) printf("\tChanged to class %s while"
" priocntl command executing\n", clname);
else
(void) printf("\tCan't get FSS user priority"
"\n");
}
}
free_pidlist(pidlist);
return (error);
}
/*
* Call priocntl() with command codes PC_SETXPARMS or PC_GETXPARMS. The
* first parameter behind the command code is always the class name.
* Each parameter is headed by a key, which detemines the meanin of the
* following value. There is maximum FSS_KEYCNT == 2 of (key, value) pairs.
*/
static int
fss_priocntl(idtype_t idtype, id_t id, int cmd, char *clname, uintptr_t *argsp)
{
return (priocntl(idtype, id, cmd, clname, argsp[0], argsp[1],
argsp[2], argsp[3], 0));
}
/*
* Set all processes in the set specified by idtype/idargv to fair-sharing
* (if they aren't already fair-sharing) and set their user priority limit
* and user priority to those specified by fssuprilim and fssupri.
*/
static int
set_fssprocs(idtype_t idtype, int idargc, char **idargv, uint_t cflags,
short fssuprilim, short fssupri)
{
pcinfo_t pcinfo;
uintptr_t args[2 * FSS_KEYCNT + 1];
uintptr_t *argsp = &args[0];
pri_t maxupri;
char idtypnm[PC_IDTYPNMSZ];
int i;
int error = 0;
id_t id;
/*
* Get the fair sharing class ID and max configured user priority.
*/
(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));
maxupri = ((fssinfo_t *)pcinfo.pc_clinfo)->fss_maxupri;
/*
* Validate the fssuprilim and fssupri arguments.
*/
if ((cflags & FSS_DOUPRILIM) != 0) {
if (fssuprilim > maxupri || fssuprilim < -maxupri)
fatalerr("%s: Specified user priority limit %d out of "
"configured range\n", basenm, fssuprilim);
ADDKEYVAL(argsp, FSS_KY_UPRILIM, fssuprilim);
}
if ((cflags & FSS_DOUPRI) != 0) {
if (fssupri > maxupri || fssupri < -maxupri)
fatalerr("%s: Specified user priority %d out of "
"configured range\n", basenm, fssupri);
ADDKEYVAL(argsp, FSS_KY_UPRI, fssupri);
}
*argsp = 0;
if (idtype == P_ALL) {
if (fss_priocntl(P_ALL, 0, PC_SETXPARMS, "FSS", args) == -1) {
if (errno == EPERM) {
(void) fprintf(stderr, "Permissions error "
"encountered on one or more processes.\n");
error = 1;
} else {
fatalerr("%s: Can't reset fair sharing "
"parameters\npriocntl system call failed "
"(%s)\n", basenm, strerror(errno));
}
} else if ((cflags & (FSS_DOUPRILIM|FSS_DOUPRI)) ==
FSS_DOUPRI) {
(void) verifyupri(idtype, 0, "FSS", FSS_KY_UPRILIM,
fssupri, basenm);
}
} else if (idargc == 0) {
if (fss_priocntl(idtype, P_MYID, PC_SETXPARMS, "FSS",
args) == -1) {
if (errno == EPERM) {
(void) idtyp2str(idtype, idtypnm);
(void) fprintf(stderr, "Permissions error "
"encountered on current %s.\n", idtypnm);
error = 1;
} else {
fatalerr("%s: Can't reset fair sharing "
"parameters\npriocntl system call failed "
"(%s)\n", basenm, strerror(errno));
}
} else if ((cflags & (FSS_DOUPRILIM|FSS_DOUPRI)) ==
FSS_DOUPRI && getmyid(idtype, &id) != -1) {
(void) verifyupri(idtype, id, "FSS", FSS_KY_UPRILIM,
fssupri, basenm);
}
} else {
(void) idtyp2str(idtype, idtypnm);
for (i = 0; i < idargc; i++) {
if (idtype == P_CID) {
(void) strcpy(pcinfo.pc_clname, idargv[i]);
if (priocntl(0, 0, PC_GETCID,
(caddr_t)&pcinfo) == -1)
fatalerr("%s: Invalid or unconfigured "
"class %s, priocntl system call "
"failed (%s)\n",
basenm, pcinfo.pc_clname,
strerror(errno));
id = pcinfo.pc_cid;
} else {
id = (id_t)str2num(idargv[i], INT_MIN, INT_MAX);
if (errno)
fatalerr("%s: Invalid id \"%s\"\n",
basenm, idargv[i]);
}
if (fss_priocntl(idtype, id, PC_SETXPARMS, "FSS",
args) == -1) {
if (errno == EPERM) {
(void) fprintf(stderr, "Permissions "
"error encountered on %s %s.\n",
idtypnm, idargv[i]);
error = 1;
} else {
fatalerr("%s: Can't reset fair sharing"
" parameters\npriocntl system call"
" failed (%s)\n",
basenm, strerror(errno));
}
} else if ((cflags & (FSS_DOUPRILIM|FSS_DOUPRI)) ==
FSS_DOUPRI) {
(void) verifyupri(idtype, id, "FSS",
FSS_KY_UPRILIM, fssupri, basenm);
}
}
}
return (error);
}
/*
* Execute the command pointed to by cmdargv as a fair-sharing process
* with the user priority limit given by fssuprilim and user priority fssupri.
*/
static void
exec_fsscmd(char **cmdargv, uint_t cflags, pri_t fssuprilim, pri_t fssupri)
{
pcinfo_t pcinfo;
uintptr_t args[2 * FSS_KEYCNT + 1];
uintptr_t *argsp = &args[0];
pri_t maxupri;
pri_t uprilim;
/*
* Get the fair sharing class ID and max configured user priority.
*/
(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));
maxupri = ((fssinfo_t *)pcinfo.pc_clinfo)->fss_maxupri;
if ((cflags & FSS_DOUPRILIM) != 0) {
if (fssuprilim > maxupri || fssuprilim < -maxupri)
fatalerr("%s: Specified user priority limit %d out of "
"configured range\n", basenm, fssuprilim);
ADDKEYVAL(argsp, FSS_KY_UPRILIM, fssuprilim);
}
if ((cflags & FSS_DOUPRI) != 0) {
if (fssupri > maxupri || fssupri < -maxupri)
fatalerr("%s: Specified user priority %d out of "
"configured range\n", basenm, fssupri);
ADDKEYVAL(argsp, FSS_KY_UPRI, fssupri);
}
*argsp = 0;
if (fss_priocntl(P_PID, P_MYID, PC_SETXPARMS, "FSS", args) == -1)
fatalerr("%s: Can't reset fair sharing parameters\n"
"priocntl system call failed (%s)\n",
basenm, strerror(errno));
if ((cflags & (FSS_DOUPRILIM|FSS_DOUPRI)) == FSS_DOUPRI) {
if (priocntl(P_PID, P_MYID, PC_GETXPARMS, "FSS",
FSS_KY_UPRILIM, &uprilim, 0) != -1 && fssupri > uprilim)
(void) fprintf(stderr,
"%s: Specified user priority %d exceeds"
" limit %d; set to %d (pid %d)\n",
basenm, fssupri, uprilim, uprilim, (int)getpid());
}
(void) execvp(cmdargv[0], cmdargv);
fatalerr("%s: Can't execute %s, exec failed (%s)\n",
basenm, cmdargv[0], strerror(errno));
}