rcap/rcapadm/rcapadm.c

	rcapadm.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <libscf.h>
#include <libscf_priv.h>
#include <libintl.h>
#include <locale.h>

#include "utils.h"
#include "rcapd.h"
#include "rcapd_conf.h"
#include "rcapd_stat.h"

#define CFG_TEMPLATE_SUFFIX ".XXXXXX"   /* suffix of mkstemp() arg */
#define RCAP_FMRI       "system/rcap:default"

static void
usage()
{
    (void) fprintf(stderr,
        gettext("usage: rcapadm\n"
        "               [-E|-D]                                "
        "# enable/disable rcapd\n"
        "               [-n]                                   "
        "# don't start/stop rcapd\n"
        "               [-i <scan|sample|report|config>=value] "
        "# set intervals\n"
        "               [-c <percent>]                         "
        "# set memory cap\n"
        "                                                      "
        "# enforcement threshold\n"));
    exit(E_USAGE);
}

static rcfg_t conf;
static int enable = -1;
static int disable = -1;
static int pressure = -1;
static int no_starting_stopping = -1;
static int scan_interval = -1;
static int report_interval = -1;
static int config_interval = -1;
static int sample_interval = -1;
static char *fname = RCAPD_DEFAULT_CONF_FILE;

static char *subopt_v[] = {
    "scan",
    "sample",
    "report",
    "config",
    NULL
};

typedef enum {
    OPT_SCAN = 0,
    OPT_SAMPLE,
    OPT_REPORT,
    OPT_CONFIG
} subopt_idx_t;

static void
print_state(void)
{
    scf_simple_prop_t *persistent_prop = NULL;
    scf_simple_prop_t *temporary_prop = NULL;
    uint8_t *persistent = NULL;
    uint8_t *temporary = NULL;
    scf_handle_t *h;
    /* LINTED: conditionally assigned and used in function */
    ssize_t numvals;

    if ((h = scf_handle_create(SCF_VERSION)) == NULL ||
        scf_handle_bind(h) != 0)
        goto out;

    if ((persistent_prop = scf_simple_prop_get(h, RCAP_FMRI,
        SCF_PG_GENERAL, SCF_PROPERTY_ENABLED)) != NULL && (numvals =
        scf_simple_prop_numvalues(persistent_prop)) > 0)
        persistent = scf_simple_prop_next_boolean(persistent_prop);

    if ((temporary_prop = scf_simple_prop_get(h, RCAP_FMRI,
        SCF_PG_GENERAL_OVR, SCF_PROPERTY_ENABLED)) != NULL && (numvals =
        scf_simple_prop_numvalues(temporary_prop)) > 0)
        temporary = scf_simple_prop_next_boolean(temporary_prop);

out:
    if (!persistent)
        (void) printf(gettext("                                      "
            "state: unknown"));
    else if (temporary && *temporary != *persistent)
        (void) printf(gettext("                                      "
            "state: %s (%s at next boot)\n"), *temporary ?
            gettext("enabled") : gettext("disabled"), *persistent ?
            gettext("enabled") : gettext("disabled"));
    else
        (void) printf(gettext("                                      "
            "state: %s\n"), *persistent ? gettext("enabled") :
            gettext("disabled"));

    scf_simple_prop_free(temporary_prop);
    scf_simple_prop_free(persistent_prop);
    scf_handle_destroy(h);
}

int
main(int argc, char *argv[])
{
    char *subopts, *optval, *template;
    int modified = 0;
    FILE *fp;
    int fd, olderrno, opt;

    (void) setprogname("rcapadm");
    (void) setlocale(LC_ALL, "");
    (void) textdomain(TEXT_DOMAIN);

    while ((opt = getopt(argc, argv, "DEc:i:n")) != EOF) {
        switch (opt) {
        case 'n':
            no_starting_stopping = 1;
            break;
        case 'c':
            if ((pressure = xatoi(optarg)) < 0 ||
                pressure > 100 ||
                errno == EINVAL)
                usage();
            modified++;
            break;
        case 'E':
            enable = 1;
            disable = 0;
            modified++;
            break;
        case 'D':
            disable = 1;
            enable = 0;
            modified++;
            break;
        case 'i':
            subopts = optarg;
            while (*subopts != '\0') {
                switch (getsubopt(&subopts, subopt_v,
                    &optval)) {
                    case OPT_SCAN:
                        if (optval == NULL ||
                            (scan_interval =
                            xatoi(optval)) <= 0)
                            usage();
                        break;
                    case OPT_SAMPLE:
                        if (optval == NULL ||
                            (sample_interval =
                            xatoi(optval)) <= 0)
                            usage();
                        break;
                    case OPT_REPORT:
                        if (optval == NULL ||
                            (report_interval =
                            xatoi(optval)) < 0)
                            usage();
                        break;
                    case OPT_CONFIG:
                        if (optval == NULL ||
                            (config_interval =
                            xatoi(optval)) < 0)
                            usage();
                        break;
                    default:
                        usage();
                }
            }
            modified++;
            break;
        default:
            usage();
        }
    }

    if (argc > optind)
        usage();

    if (rcfg_read(fname, -1, &conf, NULL) < 0) {
        if (!(errno == ENOENT && modified)) {
            die(gettext("resource caps not configured\n"));
            return (E_ERROR);
        }
        rcfg_init(&conf);
        conf.rcfg_mode_name = "project";
        conf.rcfg_reconfiguration_interval = 60;
        conf.rcfg_proc_walk_interval = 15;
        conf.rcfg_report_interval = 5;
        conf.rcfg_rss_sample_interval = 5;
    } else {
        /*
         * The configuration file has been read.  Warn that any lnode
         * (or non-project) mode specification (by an SRM
         * 1.3 configuration file, for example) is ignored.
         */
        if (strcmp(conf.rcfg_mode_name, "project") != 0) {
            warn(gettext("%s mode specification ignored -- using"
                " project mode\n"), conf.rcfg_mode_name);
            conf.rcfg_mode_name = "project";
            conf.rcfg_mode = rctype_project;
        }
    }

    if (modified) {
        if (pressure >= 0)
            conf.rcfg_memory_cap_enforcement_pressure = pressure;
        if (config_interval >= 0)
            conf.rcfg_reconfiguration_interval = config_interval;
        if (scan_interval >= 0)
            conf.rcfg_proc_walk_interval = scan_interval;
        if (report_interval >= 0)
            conf.rcfg_report_interval = report_interval;
        if (sample_interval >= 0)
            conf.rcfg_rss_sample_interval = sample_interval;

        if ((template = malloc(strlen(fname) +
            strlen(CFG_TEMPLATE_SUFFIX) + 1)) == NULL)
            die(gettext("memory allocation failure"));
        (void) strcpy(template, fname);
        (void) strcpy(template + strlen(template), CFG_TEMPLATE_SUFFIX);
        if ((fd = mkstemp(template)) < 0)
            die("%s", template);
        if ((fp = fdopen(fd, "w")) == NULL) {
            olderrno = errno;
            (void) close(fd);
            (void) unlink(template);
            errno = olderrno;
            die("%s", template);
            return (E_ERROR);
        }
        (void) fputs("#\n# rcap.conf\n#\n"
            "# Configuration parameters for resource capping daemon.\n"
            "# Do NOT edit by hand -- use rcapadm(1m) instead.\n"
            "#\n", fp);
        (void) fprintf(fp, "RCAPD_MEMORY_CAP_ENFORCEMENT_PRESSURE  "
            "= %d\n", conf.rcfg_memory_cap_enforcement_pressure);
        (void) fprintf(fp, "RCAPD_RECONFIGURATION_INTERVAL         "
            "= %d\n", conf.rcfg_reconfiguration_interval);
        (void) fprintf(fp, "RCAPD_PROC_WALK_INTERVAL               "
            "= %d\n", conf.rcfg_proc_walk_interval);
        (void) fprintf(fp, "RCAPD_REPORT_INTERVAL                  "
            "= %d\n", conf.rcfg_report_interval);
        (void) fprintf(fp, "RCAPD_RSS_SAMPLE_INTERVAL              "
            "= %d\n", conf.rcfg_rss_sample_interval);
        if (fchmod(fd, 0644) != 0) {
            olderrno = errno;
            (void) close(fd);
            (void) fclose(fp);
            (void) unlink(template);
            errno = olderrno;
            die("%s", template);
        }
        if (rename(template, fname) != 0) {
            olderrno = errno;
            (void) close(fd);
            (void) fclose(fp);
            (void) unlink(template);
            errno = olderrno;
            die(gettext("cannot rename temporary file to %s"),
                fname);
        }
        (void) fclose(fp);
        (void) close(fd);
        free(template);

        if (enable > 0 && smf_enable_instance(RCAP_FMRI,
            no_starting_stopping > 0 ? SMF_AT_NEXT_BOOT : 0) != 0)
            die(gettext("cannot enable service: %s\n"),
                scf_strerror(scf_error()));
        else if (disable > 0 && smf_disable_instance(RCAP_FMRI,
            no_starting_stopping > 0 ? SMF_AT_NEXT_BOOT : 0) != 0)
            die(gettext("cannot disable service: %s\n"),
                scf_strerror(scf_error()));

        return (E_SUCCESS);
    }

    /*
     * Display current configuration
     */
    print_state();
    (void) printf(gettext("           memory cap enforcement"
        " threshold: %d%%\n"), conf.rcfg_memory_cap_enforcement_pressure);
    (void) printf(gettext("                    process scan rate"
        " (sec): %d\n"), conf.rcfg_proc_walk_interval);
    (void) printf(gettext("                 reconfiguration rate"
        " (sec): %d\n"), conf.rcfg_reconfiguration_interval);
    (void) printf(gettext("                          report rate"
        " (sec): %d\n"), conf.rcfg_report_interval);
    (void) printf(gettext("                    RSS sampling rate"
        " (sec): %d\n"), conf.rcfg_rss_sample_interval);

    return (E_SUCCESS);
}