cmd/ndmpstat/ndmpstat_main.c

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * BSD 3 Clause License
 *
 * Copyright (c) 2007, The Storage Networking Industry Association.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 *  - Neither the name of The Storage Networking Industry Association (SNIA)
 *    nor the names of its contributors may be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include <unistd.h>
#include <memory.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <values.h>
#include <poll.h>
#include <locale.h>
#include <libndmp.h>

#define MAX_DEV_STAT    16
#define REPRINT 19
#define VAL(v)      (new->ns_##v)
#define DELTA(v)    (new->ns_##v - (old ? old->ns_##v : 0))
#define ADJ(n)      ((adj <= 0) ? n : (adj >= n) ? 1 : n - adj)
#define adjprintf(fmt, n, val)  adj -= (n + 1) - printf(fmt, ADJ(n), val)
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif

static int adj;     /* number of excess columns */
static long iter = 0;
static int blksize = 1024;
static int poll_interval = 1;
static ndmp_stat_t *nstat;
static int lines = 1;

static void dostats(ndmp_stat_t *, ndmp_stat_t *);
static void printhdr(int);
static void usage(void);

int
main(int argc, char **argv)
{
    ndmp_stat_t *old = NULL;

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

    argc--, argv++;

    if (argc > 0) {
        long interval;
        char *endptr;

        errno = 0;
        interval = strtol(argv[0], &endptr, 10);

        if (errno > 0 || *endptr != '\0' || interval <= 0 ||
            interval > MAXLONG) {
            usage();
            return (1);
        }
        poll_interval = 1000 * interval;
        if (poll_interval <= 0) {
            usage();
            return (1);
        }
        iter = MAXLONG;
        if (argc > 1) {
            iter = strtol(argv[1], NULL, 10);
            if (errno > 0 || *endptr != '\0' || iter <= 0) {
                usage();
                return (1);
            }
        }
        if (argc > 2) {
            usage();
            return (1);
        }
    }

    if (ndmp_door_status()) {
        (void) fprintf(stdout,
            gettext(" Error: ndmpd service not running.\n"));
        return (1);
    }

    (void) sigset(SIGCONT, printhdr);

    printhdr(0);

    if ((nstat = malloc(sizeof (ndmp_stat_t))) == NULL) {
        (void) fprintf(stdout, gettext("Out of memory"));
        return (1);
    }


    if (ndmp_get_stats(nstat) != 0) {
        free(nstat);
        return (1);
    }

    dostats(old, nstat);
    while (--iter > 0) {
        (void) poll(NULL, 0, poll_interval);

        free(old);
        old = nstat;
        if ((nstat = malloc(sizeof (ndmp_stat_t))) == NULL) {
            (void) fprintf(stdout, gettext("Out of memory"));
            free(old);
            return (1);
        }
        if (ndmp_get_stats(nstat) != 0) {
            free(old);
            free(nstat);
            return (1);
        }
        dostats(old, nstat);
    }

    return (0);
}

/* ARGSUSED */
static void
printhdr(int sig)
{
    (void) printf(" wthr  ops    file      disk      tape      ");
    (void) printf("bytes   perf     prcnt\n");

    (void) printf(" r w  bk rs  rd   wr   rd   wr   rd   wr   rd   ");
    (void) printf("wr  bk rs  dsk tpe idl\n");

    lines = REPRINT;
}

static void
dostats(ndmp_stat_t *old, ndmp_stat_t *new)
{
    long long dskop = 0;
    long long tpop = 0;
    long dpcnt, tpcnt;
    long ipcnt;
    int totl;
    long rbytes;
    long wbytes;

    adj = 0;

    if (--lines == 0)
        printhdr(0);

    if (!old) {
        (void) printf(" 0 0  0  0    0    0    0    ");
        (void) printf("0    0    0    0    0   0  0    0   0 100\n");
        return;
    }

    adjprintf(" %*u", 1, VAL(trun));
    adjprintf(" %*u", 1, VAL(twait));
    adjprintf(" %*u", 2, VAL(nbk));
    adjprintf(" %*u", 2, VAL(nrs));
    adjprintf(" %*u", 4, DELTA(rfile));
    adjprintf(" %*u", 4, DELTA(wfile));
    adjprintf(" %*u", 4, (unsigned)(DELTA(rdisk) / blksize));
    adjprintf(" %*u", 4, (unsigned)(DELTA(wdisk) / blksize));
    adjprintf(" %*u", 4, (unsigned)(DELTA(rtape) / blksize));
    adjprintf(" %*u", 4, (unsigned)(DELTA(wtape) / blksize));

    /* Get the average throughput */
    rbytes = (DELTA(wtape) + DELTA(rdisk)) / 2;
    wbytes = (DELTA(rtape) + DELTA(wdisk)) / 2;
    rbytes /= blksize;
    wbytes /= blksize;

    adjprintf(" %*lu", 4, rbytes);
    adjprintf(" %*lu", 4, wbytes);

    adjprintf(" %*lu", 3, rbytes / poll_interval);
    adjprintf(" %*lu", 2, wbytes / poll_interval);

    dskop += DELTA(rdisk);
    dskop += DELTA(wdisk);
    tpop += DELTA(rtape);
    tpop += DELTA(wtape);
    totl = (dskop + tpop) ? (dskop + tpop) : 1;

    dpcnt = (dskop * 100) / totl;
    tpcnt = (tpop * 100) / totl;
    ipcnt = 100 - dpcnt - tpcnt;

    adjprintf(" %*lu", 4, dpcnt);
    adjprintf(" %*lu", 3, tpcnt);
    adjprintf(" %*lu\n", 3, ipcnt);
    (void) fflush(stdout);
}

static void
usage(void)
{
    (void) fprintf(stderr, "Usage: ndmpstat [interval [count]]\n");
}