fmd/common/fmd_builtin.c

/*
 * 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 (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#include <fmd_module.h>
#include <fmd_subr.h>
#include <fmd_error.h>
#include <fmd_string.h>
#include <fmd_event.h>
#include <fmd_builtin.h>
#include <zone.h>

static const struct fmd_builtin _fmd_builtins[] = {
    { "fmd-self-diagnosis", self_init, self_fini, FMD_BUILTIN_ALLCTXT },
    { "sysevent-transport", sysev_init, sysev_fini,
        FMD_BUILTIN_CTXT_GLOBALZONE },
    { NULL, NULL, NULL, 0 }
};

static int
bltin_init(fmd_module_t *mp)
{
    const fmd_builtin_t *bp;

    for (bp = _fmd_builtins; bp->bltin_name != NULL; bp++) {
        if (strcmp(mp->mod_name, bp->bltin_name) == 0)
            break;
    }

    if (bp == NULL)
        return (fmd_set_errno(EFMD_BLTIN_NAME));

    if (bp->bltin_init == NULL)
        return (fmd_set_errno(EFMD_BLTIN_INIT));

    mp->mod_data = (void *)bp;
    (void) pthread_mutex_unlock(&mp->mod_lock);

    /*
     * Call _fmd_init() in the module.  If this causes a module abort and
     * mod_info has been registered, unregister it on behalf of the module.
     */
    if (fmd_module_enter(mp, bp->bltin_init) != 0 && mp->mod_info != NULL)
        fmd_hdl_unregister((fmd_hdl_t *)mp);

    fmd_module_exit(mp);
    (void) pthread_mutex_lock(&mp->mod_lock);

    if (mp->mod_info == NULL)
        return (fmd_set_errno(EFMD_HDL_INIT));

    return (0);
}

static int
bltin_fini(fmd_module_t *mp)
{
    fmd_builtin_t *bp = mp->mod_data;

    if (mp->mod_info != NULL) {
        (void) fmd_module_enter(mp, bp->bltin_fini);

        if (mp->mod_info != NULL) {
            fmd_module_lock(mp);
            fmd_module_unregister(mp);
            fmd_module_unlock(mp);
        }

        fmd_module_exit(mp);
    }

    return (0);
}

const fmd_modops_t fmd_bltin_ops = {
    bltin_init,
    bltin_fini,
    fmd_module_dispatch,
    fmd_module_transport,
};

int
fmd_builtin_loadall(fmd_modhash_t *mhp)
{
    const fmd_builtin_t *bp;
    uint32_t ctxt = 0;
    int err = 0;

    ctxt |= (getzoneid() == GLOBAL_ZONEID) ? FMD_BUILTIN_CTXT_GLOBALZONE :
        FMD_BUILTIN_CTXT_NONGLOBALZONE;

    for (bp = _fmd_builtins; bp->bltin_name != NULL; bp++) {
        if (!(ctxt & bp->bltin_ctxts))
            continue;

        if (fmd_modhash_load(mhp, bp->bltin_name,
            &fmd_bltin_ops) == NULL)
            err = -1;
    }

    return (err);
}