libpkg/common/handlelocalfs.c

	handlelocalfs.c revision 5c51f1241dbbdf2656d0e10011981411ed0c9673
/*
 *
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
*/


#include <stdlib.h>
#include <unistd.h>
#include <strings.h>
#include <libscf.h>

#define MAX_TRY 15
static boolean_t fs_temporarily_enabled = B_FALSE;
char svm_core_svcs[] = "system/filesystem/local:default";

/*
 * Name:    enable_local_fs
 * Description: If the SMF service system/filesystem/local:default is not
 *      enabled, then this function enables the service, so that,
 *      all the local filesystems are mounted.
 * Arguments:   None
 * Returns: B_TRUE on success; B_FALSE on error.
 */
boolean_t
enable_local_fs(void)
{
    char *cur_smf_state;
    int i;
    boolean_t fs_enabled_here = B_FALSE;

    if (fs_temporarily_enabled)  {
        return (B_TRUE);
    }

    if ((cur_smf_state = smf_get_state(svm_core_svcs)) != NULL) {
        if (strcmp(cur_smf_state, SCF_STATE_STRING_DISABLED) == 0) {
            if (smf_enable_instance(svm_core_svcs, SMF_TEMPORARY)
                != 0) {
                free(cur_smf_state);
                return (B_FALSE);
            }

            fs_enabled_here = B_TRUE;

        } else if (strcmp(cur_smf_state, SCF_STATE_STRING_ONLINE)
                == 0) {
            free(cur_smf_state);
            return (B_TRUE);
        } else if (strcmp(cur_smf_state, SCF_STATE_STRING_OFFLINE)
                != 0) {
            free(cur_smf_state);
            return (B_FALSE);
        }

        free(cur_smf_state);

    } else {
        return (B_FALSE);
    }

    for (i = 0; i < MAX_TRY; i++) {
        if ((cur_smf_state = smf_get_state(svm_core_svcs)) != NULL) {
            if (strcmp(cur_smf_state, SCF_STATE_STRING_ONLINE)
                == 0) {
                free(cur_smf_state);
                if (fs_enabled_here) {
                    fs_temporarily_enabled = B_TRUE;
                }
                return (B_TRUE);
            } else if ((strcmp(cur_smf_state,
                SCF_STATE_STRING_OFFLINE) == 0) ||
        (strcmp(cur_smf_state, SCF_STATE_STRING_DISABLED) == 0)) {
                (void) sleep(1);
                free(cur_smf_state);
            } else {
                free(cur_smf_state);
                return (B_FALSE);
            }
        } else {
            return (B_FALSE);
        }
    }

    return (B_FALSE);
}

/*
 * Name:    restore_local_fs
 * Description: If the SMF service system/filesystem/local:default was
 *      enabled using enable_local_fs(), then this function disables
 *      the service.
 * Arguments:   None
 * Returns: B_TRUE on success; B_FALSE on error.
 */
boolean_t
restore_local_fs(void)
{
    int i;
    char *cur_smf_state;

    if (!fs_temporarily_enabled) {
        return (B_TRUE);
    }

    if (smf_disable_instance(svm_core_svcs, SMF_TEMPORARY) != 0) {
        return (B_FALSE);
    }

    for (i = 0; i < MAX_TRY; i++) {
        if ((cur_smf_state = smf_get_state(svm_core_svcs)) != NULL) {
            if (strcmp(cur_smf_state, SCF_STATE_STRING_DISABLED)
                == 0) {
                fs_temporarily_enabled = B_FALSE;
                free(cur_smf_state);
                break;
            }
            (void) sleep(1);

            free(cur_smf_state);
        } else {
            return (B_FALSE);
        }
    }

    return (!fs_temporarily_enabled);
}