1 files changed, 279 insertions, 0 deletions
diff --git a/usr/src/cmd/dispadmin/fssdispadmin.c b/usr/src/cmd/dispadmin/fssdispadmin.c
new file mode 100644
index 0000000000..0a404bec62
--- /dev/null
+++ b/usr/src/cmd/dispadmin/fssdispadmin.c
@@ -0,0 +1,279 @@
+/*
+ * 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));
+}