cmd/dumpadm/minfree.c

d29b2c4438482eb00488be49a1f5d6835f455546ab/*
d29b2c4438482eb00488be49a1f5d6835f455546ab * CDDL HEADER START
d29b2c4438482eb00488be49a1f5d6835f455546ab *
d29b2c4438482eb00488be49a1f5d6835f455546ab * The contents of this file are subject to the terms of the
d29b2c4438482eb00488be49a1f5d6835f455546ab * Common Development and Distribution License, Version 1.0 only
d29b2c4438482eb00488be49a1f5d6835f455546ab * (the "License").  You may not use this file except in compliance
d29b2c4438482eb00488be49a1f5d6835f455546ab * with the License.
d29b2c4438482eb00488be49a1f5d6835f455546ab *
d29b2c4438482eb00488be49a1f5d6835f455546ab * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
d29b2c4438482eb00488be49a1f5d6835f455546ab * or http://www.opensolaris.org/os/licensing.
d29b2c4438482eb00488be49a1f5d6835f455546ab * See the License for the specific language governing permissions
d29b2c4438482eb00488be49a1f5d6835f455546ab * and limitations under the License.
d29b2c4438482eb00488be49a1f5d6835f455546ab *
d29b2c4438482eb00488be49a1f5d6835f455546ab * When distributing Covered Code, include this CDDL HEADER in each
d29b2c4438482eb00488be49a1f5d6835f455546ab * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
d29b2c4438482eb00488be49a1f5d6835f455546ab * If applicable, add the following below this CDDL HEADER, with the
d29b2c4438482eb00488be49a1f5d6835f455546ab * fields enclosed by brackets "[]" replaced with your own identifying
d29b2c4438482eb00488be49a1f5d6835f455546ab * information: Portions Copyright [yyyy] [name of copyright owner]
d29b2c4438482eb00488be49a1f5d6835f455546ab *
d29b2c4438482eb00488be49a1f5d6835f455546ab * CDDL HEADER END
d29b2c4438482eb00488be49a1f5d6835f455546ab */
d29b2c4438482eb00488be49a1f5d6835f455546ab/*
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans * Copyright (c) 2000 by Sun Microsystems, Inc.
d29b2c4438482eb00488be49a1f5d6835f455546ab * All rights reserved.
33f5ff17089e3a43e6e730bf80384c233123dbd9Milan Jurik */
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab#pragma ident   "%Z%%M% %I% %E% SMI"
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <sys/types.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <sys/statvfs.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <sys/param.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <sys/stat.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <unistd.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <string.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <stdio.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab#include <fcntl.h>
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab#include "utils.h"
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546abstatic FILE *
d29b2c4438482eb00488be49a1f5d6835f455546abminfree_open(const char *dir, int oflags, const char *fmode)
d29b2c4438482eb00488be49a1f5d6835f455546ab{
d29b2c4438482eb00488be49a1f5d6835f455546ab    char path[MAXPATHLEN];
d29b2c4438482eb00488be49a1f5d6835f455546ab    int fd;
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    (void) snprintf(path, sizeof (path), "%s/minfree", dir);
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    if ((fd = open(path, oflags, S_IRUSR | S_IWUSR)) >= 0)
d29b2c4438482eb00488be49a1f5d6835f455546ab        return (fdopen(fd, fmode));
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    return (NULL);
d29b2c4438482eb00488be49a1f5d6835f455546ab}
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546abint
d29b2c4438482eb00488be49a1f5d6835f455546abminfree_read(const char *dir, unsigned long long *ullp)
d29b2c4438482eb00488be49a1f5d6835f455546ab{
d29b2c4438482eb00488be49a1f5d6835f455546ab    FILE *fp = minfree_open(dir, O_RDONLY, "r");
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    if (fp != NULL) {
d29b2c4438482eb00488be49a1f5d6835f455546ab        char buf[BUFSIZ];
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans        int status = -1;
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab        if (fgets(buf, BUFSIZ, fp) != NULL) {
d29b2c4438482eb00488be49a1f5d6835f455546ab            if (valid_str2ull(buf, ullp))
d29b2c4438482eb00488be49a1f5d6835f455546ab                status = 0;
d29b2c4438482eb00488be49a1f5d6835f455546ab            else
d29b2c4438482eb00488be49a1f5d6835f455546ab                warn(gettext("\"%s/minfree\": invalid minfree "
d29b2c4438482eb00488be49a1f5d6835f455546ab                    "value -- %s\n"), dir, buf);
d29b2c4438482eb00488be49a1f5d6835f455546ab        }
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab        (void) fclose(fp);
d29b2c4438482eb00488be49a1f5d6835f455546ab        return (status);
d29b2c4438482eb00488be49a1f5d6835f455546ab    }
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    return (-1);
d29b2c4438482eb00488be49a1f5d6835f455546ab}
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546abint
d29b2c4438482eb00488be49a1f5d6835f455546abminfree_write(const char *dir, unsigned long long ull)
d29b2c4438482eb00488be49a1f5d6835f455546ab{
d29b2c4438482eb00488be49a1f5d6835f455546ab    FILE *fp = minfree_open(dir, O_WRONLY | O_CREAT | O_TRUNC, "w");
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    if (fp != NULL) {
d29b2c4438482eb00488be49a1f5d6835f455546ab        int status = fprintf(fp, "%llu\n", ull);
d29b2c4438482eb00488be49a1f5d6835f455546ab        (void) fclose(fp);
d29b2c4438482eb00488be49a1f5d6835f455546ab        return (status);
d29b2c4438482eb00488be49a1f5d6835f455546ab    }
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    return (-1);
d29b2c4438482eb00488be49a1f5d6835f455546ab}
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546abint
d29b2c4438482eb00488be49a1f5d6835f455546abminfree_compute(const char *dir, char *s, unsigned long long *ullp)
d29b2c4438482eb00488be49a1f5d6835f455546ab{
d29b2c4438482eb00488be49a1f5d6835f455546ab    size_t len = strlen(s);
d29b2c4438482eb00488be49a1f5d6835f455546ab    unsigned long long m = 1;
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    struct statvfs64 fsb;
d29b2c4438482eb00488be49a1f5d6835f455546ab    int pct;
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    switch (s[len - 1]) {
d29b2c4438482eb00488be49a1f5d6835f455546ab    case '%':
d29b2c4438482eb00488be49a1f5d6835f455546ab        s[len - 1] = '\0';
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab        if (!valid_str2int(s, &pct) || pct > 100) {
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans            warn(gettext("invalid minfree %% -- %s\n"), s);
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans            return (-1);
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans        }
d29b2c4438482eb00488be49a1f5d6835f455546ab
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans        if (statvfs64(dir, &fsb) == -1) {
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans            warn(gettext("failed to statvfs %s"), dir);
d29b2c4438482eb00488be49a1f5d6835f455546ab            return (-1);
d29b2c4438482eb00488be49a1f5d6835f455546ab        }
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab        *ullp = fsb.f_blocks * fsb.f_frsize *
d29b2c4438482eb00488be49a1f5d6835f455546ab            (u_longlong_t)pct / 100ULL / 1024ULL;
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab        return (0);
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    case 'm':
d29b2c4438482eb00488be49a1f5d6835f455546ab    case 'M':
d29b2c4438482eb00488be49a1f5d6835f455546ab        m = 1024ULL;
d29b2c4438482eb00488be49a1f5d6835f455546ab        /*FALLTHRU*/
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    case 'k':
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans    case 'K':
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans        s[len - 1] = '\0';
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans
d29b2c4438482eb00488be49a1f5d6835f455546ab        if (valid_str2ull(s, ullp)) {
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans            *ullp *= m;
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans            return (0);
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans        }
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab        warn(gettext("invalid minfree value -- %s\n"), s);
d29b2c4438482eb00488be49a1f5d6835f455546ab        return (-1);
d29b2c4438482eb00488be49a1f5d6835f455546ab
d29b2c4438482eb00488be49a1f5d6835f455546ab    default:
d29b2c4438482eb00488be49a1f5d6835f455546ab        warn(gettext("expected m, k, or %% unit after "
d29b2c4438482eb00488be49a1f5d6835f455546ab            "minfree -- %s\n"), s);
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans        return (-1);
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans    }
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans}
08278a5e91755ccdb5850c19d21d42fb2e16b50eRod Evans