/*      $NetBSD: mbufs.c,v 1.16 2012/11/23 01:43:10 christos Exp $      */

/*-
* Copyright (c) 1980, 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the University 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 REGENTS 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 REGENTS 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 <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)mbufs.c     8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: mbufs.c,v 1.16 2012/11/23 01:43:10 christos Exp $");
#endif /* not lint */

#include <sys/param.h>
#define MBUFTYPES
#include <sys/mbuf.h>
#include <sys/sysctl.h>

#include <stdlib.h>
#include <errno.h>
#include <string.h>

#include "systat.h"
#include "extern.h"

static struct mbstat *mb;

#define NNAMES  __arraycount(mbuftypes)

WINDOW *
openmbufs(void)
{

       return (subwin(stdscr, -1, 0, 5, 0));
}

void
closembufs(WINDOW *w)
{

       if (w == NULL)
               return;
       wclear(w);
       wrefresh(w);
       delwin(w);
}

void
labelmbufs(void)
{

       wmove(wnd, 0, 0); wclrtoeol(wnd);
       mvwaddstr(wnd, 0, 10,
           "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
}

void
showmbufs(void)
{
       int i, j, max, idx;
       char buf[10];

       if (mb == 0)
               return;
       for (j = 1; j <= getmaxy(wnd); j++) {
               max = 0, idx = -1;
               for (i = 0; i < getmaxy(wnd); i++)
                       if (mb->m_mtypes[i] > max) {
                               max = mb->m_mtypes[i];
                               idx = i;
                       }
               if (max == 0)
                       break;
               if (j >= (int)NNAMES)
                       mvwprintw(wnd, j, 0, "%10d", idx);
               else
                       mvwprintw(wnd, j, 0, "%-10.10s", &mbuftypes[idx][2]);
               wmove(wnd, j, 10);
               if (max > 60) {
                       snprintf(buf, sizeof buf, " %5d", max);
                       max = 60;
                       while (max--)
                               waddch(wnd, 'X');
                       waddstr(wnd, buf);
               } else {
                       wclrtoeol(wnd);
                       whline(wnd, 'X', max);
               }
               mb->m_mtypes[idx] = 0;
       }
       wmove(wnd, j, 0);
       wclrtobot(wnd);
}

int
initmbufs(void)
{
       if (mb == 0)
               mb = calloc(1, sizeof (*mb));
       return(1);
}

void
fetchmbufs(void)
{
       size_t len = sizeof(*mb);
       if (sysctlbyname("kern.mbuf.stats", mb, &len, NULL, 0))
               error("error getting \"kern.mbuf.stats\": %s", strerror(errno));
}