sun4u/datapath-retire/cda_main.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <cda.h>

#include <strings.h>
#include <errno.h>
#include <time.h>
#include <sys/utsname.h>
#include <sys/systeminfo.h>
#include <fm/fmd_api.h>
#include <sys/fm/protocol.h>

cda_t cda;

cda_stats_t cda_stats = {
    { "dp_offs", FMD_TYPE_UINT64, "successful cpu offlines" },
    { "dp_fails", FMD_TYPE_UINT64, "datapath faults unresolveable" },
    { "cpu_supp", FMD_TYPE_UINT64, "cpu offlines suppressed" },
    { "bad_flts", FMD_TYPE_UINT64, "invalid fault events received" },
    { "nop_flts", FMD_TYPE_UINT64, "inapplicable fault events received" },
};

typedef struct cda_subscriber {
    const char *subr_class;
    const char *subr_sname;
    uint_t subr_svers;
    void (*subr_func)(fmd_hdl_t *, nvlist_t *, nvlist_t *, const char *);
} cda_subscriber_t;

static const cda_subscriber_t cda_subrs[] = {
    { "fault.asic.*.dp", FM_FMRI_SCHEME_HC, FM_HC_SCHEME_VERSION,
        cda_dp_retire },
    { NULL, NULL, 0, NULL }
};

static const cda_subscriber_t *
cda_get_subr(fmd_hdl_t *hdl, nvlist_t *nvl, nvlist_t **asrup)
{
    const cda_subscriber_t *sp;
    nvlist_t *asru;
    char *scheme;
    uint8_t version;

    if (nvlist_lookup_nvlist(nvl, FM_FAULT_ASRU, &asru) != 0 ||
        nvlist_lookup_string(asru, FM_FMRI_SCHEME, &scheme) != 0 ||
        nvlist_lookup_uint8(asru, FM_VERSION, &version) != 0) {
        cda_stats.bad_flts.fmds_value.ui64++;
        return (NULL);
    }

    for (sp = cda_subrs; sp->subr_class != NULL; sp++) {
        if (fmd_nvl_class_match(hdl, nvl, sp->subr_class) &&
            strcmp(scheme, sp->subr_sname) == 0 &&
            version <= sp->subr_svers) {
            *asrup = asru;
            return (sp);
        }
    }

    cda_stats.nop_flts.fmds_value.ui64++;
    return (NULL);
}

static void
cda_recv_list(fmd_hdl_t *hdl, nvlist_t *nvl)
{
    char *uuid = NULL;
    nvlist_t **nva;
    uint_t nvc;
    int err = 0;

    err |= nvlist_lookup_string(nvl, FM_SUSPECT_UUID, &uuid);
    err |= nvlist_lookup_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST,
        &nva, &nvc);
    if (err != 0) {
        cda_stats.bad_flts.fmds_value.ui64++;
        return;
    }

    while (nvc-- != 0) {
        nvlist_t *nvl = *nva++;
        const cda_subscriber_t *subr;
        nvlist_t *asru;

        if (fmd_case_uuclosed(hdl, uuid))
            break;

        if ((subr = cda_get_subr(hdl, nvl, &asru)) == NULL)
            continue;

        if (subr->subr_func != NULL)
            subr->subr_func(hdl, nvl, asru, uuid);
    }
}

static void
cda_recv_one(fmd_hdl_t *hdl, nvlist_t *nvl)
{
    const cda_subscriber_t *subr;
    nvlist_t *asru;

    if ((subr = cda_get_subr(hdl, nvl, &asru)) == NULL)
        return;

    if (subr->subr_func != NULL)
        subr->subr_func(hdl, nvl, asru, NULL);
}

/*ARGSUSED*/
static void
cda_recv(fmd_hdl_t *hdl, fmd_event_t *ep, nvlist_t *nvl, const char *class)
{
    fmd_hdl_debug(hdl, "received %s\n", class);

    if (strcmp(class, FM_LIST_SUSPECT_CLASS) == 0)
        cda_recv_list(hdl, nvl);
    else
        cda_recv_one(hdl, nvl);
}

static const fmd_hdl_ops_t fmd_ops = {
    cda_recv,   /* fmdo_recv */
    NULL,       /* fmdo_timeout */
    NULL,       /* fmdo_close */
    NULL,       /* fmdo_stats */
    NULL,       /* fmdo_gc */
};

static const fmd_prop_t fmd_props[] = {
    { "cpu_tries", FMD_TYPE_UINT32, "10" },
    { "cpu_delay", FMD_TYPE_TIME, "1sec" },
    { "cpu_offline_enable", FMD_TYPE_BOOL, "true" },
    { "cpu_forced_offline", FMD_TYPE_BOOL, "true" },
    { NULL, 0, NULL }
};

static const fmd_hdl_info_t fmd_info = {
    "Datapath Retire Agent", CDA_VERSION, &fmd_ops, fmd_props
};

static int
cda_platform_check_support(fmd_hdl_t *hdl)
{
    char buf[SYS_NMLN];

    if (sysinfo(SI_PLATFORM, buf, sizeof (buf)) == -1) {
        fmd_hdl_debug(hdl, "sysinfo failed");
        return (0);
    }

    if (strcmp(buf, "SUNW,Sun-Fire-15000") == 0 ||
        strcmp(buf, "SUNW,Sun-Fire") == 0 ||
        strcmp(buf, "SUNW,Netra-T12") == 0)
        return (1);
    else
        return (0);
}

void
_fmd_init(fmd_hdl_t *hdl)
{
    hrtime_t nsec;

    if (fmd_hdl_register(hdl, FMD_API_VERSION, &fmd_info) != 0)
        return; /* invalid data in configuration file */

    if (cda_platform_check_support(hdl) == 0) {
        fmd_hdl_debug(hdl, "platform not supported");
        fmd_hdl_unregister(hdl);
        return;
    }

    fmd_hdl_subscribe(hdl, "fault.asic.*.dp");

    (void) fmd_stat_create(hdl, FMD_STAT_NOALLOC, sizeof (cda_stats) /
        sizeof (fmd_stat_t), (fmd_stat_t *)&cda_stats);

    cda.cda_cpu_tries = fmd_prop_get_int32(hdl, "cpu_tries");

    nsec = fmd_prop_get_int64(hdl, "cpu_delay");
    cda.cda_cpu_delay.tv_sec = nsec / NANOSEC;
    cda.cda_cpu_delay.tv_nsec = nsec % NANOSEC;

    cda.cda_cpu_dooffline = fmd_prop_get_int32(hdl,
        "cpu_offline_enable");
    cda.cda_cpu_forcedoffline = fmd_prop_get_int32(hdl,
        "cpu_forced_offline");
}

/*ARGSUSED*/
void
_fmd_fini(fmd_hdl_t *hdl)
{
}