/*
 * 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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/atomic.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/modctl.h>
#include <sys/sunddi.h>
#include <ipp/ipp.h>
#include <ipp/ipp_config.h>
#include <inet/common.h>
#include <ipp/meters/meter_impl.h>

#define D_SM_COMMENT    "IPP Sliding Window Meter"

/* DDI file for tswtcl ipp module */

static int tswtcl_create_action(ipp_action_id_t, nvlist_t **, ipp_flags_t);
static int tswtcl_modify_action(ipp_action_id_t, nvlist_t **, ipp_flags_t);
static int tswtcl_destroy_action(ipp_action_id_t, ipp_flags_t);
static int tswtcl_info(ipp_action_id_t, int (*)(nvlist_t *, void *), void *,
    ipp_flags_t);
static int tswtcl_invoke_action(ipp_action_id_t, ipp_packet_t *);

/* Stats init function */
static int tswtcl_statinit(ipp_action_id_t, tswtcl_data_t *);

/* Stats callback function */
static int tswtcl_update_stats(ipp_stat_t *, void *, int);

ipp_ops_t tswtcl_ops = {
        IPPO_REV,
        tswtcl_create_action,   /* ippo_action_create */
        tswtcl_modify_action,   /* ippo_action_modify */
        tswtcl_destroy_action,  /* ippo_action_destroy */
        tswtcl_info,            /* ippo_action_info */
        tswtcl_invoke_action    /* ippo_action_invoke */
};

extern struct mod_ops mod_ippops;

/*
 * Module linkage information for the kernel.
 */
static struct modlipp modlipp = {
        &mod_ippops,
        D_SM_COMMENT,
        &tswtcl_ops
};

static struct modlinkage modlinkage = {
        MODREV_1,
        (void *)&modlipp,
        NULL
};


int
_init(void)
{
        return (mod_install(&modlinkage));
}

int
_fini(void)
{
        return (mod_remove(&modlinkage));
}

int
_info(struct modinfo *modinfop)
{
        return (mod_info(&modlinkage, modinfop));
}

/* ARGSUSED */
static int
tswtcl_create_action(ipp_action_id_t aid, nvlist_t **nvlpp, ipp_flags_t flags)
{
        nvlist_t *nvlp;
        tswtcl_data_t *tswtcl_data;
        tswtcl_cfg_t *cfg_parms;
        char *next_action;
        uint32_t bstats;
        int rc, rc2;

        nvlp = *nvlpp;
        *nvlpp = NULL;          /* nvlist should be NULL on return */


        if ((cfg_parms = kmem_alloc(TSWTCL_CFG_SZ, KM_NOSLEEP)) == NULL) {
                nvlist_free(nvlp);
                return (ENOMEM);
        }

        /* parse red next action name */
        if ((rc = nvlist_lookup_string(nvlp, TSWTCL_RED_ACTION_NAME,
            &next_action)) != 0) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action:invalid config, red action" \
                    " name missing\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (rc);
        }
        if ((cfg_parms->red_action = ipp_action_lookup(next_action))
            == IPP_ACTION_INVAL) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: red action invalid\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (EINVAL);
        }

        /* parse yellow next action name */
        if ((rc = nvlist_lookup_string(nvlp, TSWTCL_YELLOW_ACTION_NAME,
            &next_action)) != 0) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action:invalid config, yellow " \
                    "action name missing\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (rc);
        }
        if ((cfg_parms->yellow_action = ipp_action_lookup(next_action))
            == IPP_ACTION_INVAL) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: yellow action invalid\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (EINVAL);
        }

        /* parse green next action name */
        if ((rc = nvlist_lookup_string(nvlp, TSWTCL_GREEN_ACTION_NAME,
            &next_action)) != 0) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action:invalid config, green " \
                    "action name missing\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (rc);
        }
        if ((cfg_parms->green_action = ipp_action_lookup(next_action))
            == IPP_ACTION_INVAL) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: green action invalid\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (EINVAL);
        }

        /* parse committed rate  - in bits / sec */
        if ((rc = nvlist_lookup_uint32(nvlp, TSWTCL_COMMITTED_RATE,
            &cfg_parms->committed_rate)) != 0) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: invalid config, "\
                    " committed rate missing\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (rc);
        }

        /* parse peak rate  - in bits / sec */
        if ((rc = nvlist_lookup_uint32(nvlp, TSWTCL_PEAK_RATE,
            &cfg_parms->peak_rate)) != 0) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: invalid config, "\
                    " peak rate missing\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (rc);
        }

        if (cfg_parms->peak_rate < cfg_parms->committed_rate) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: invalid config, "\
                    " peak rate < committed rate\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (EINVAL);
        }

        /* parse window - in msec */
        if ((rc = nvlist_lookup_uint32(nvlp, TSWTCL_WINDOW,
            &cfg_parms->window)) != 0) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: invalid config, "\
                    " window missing\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (rc);
        }
        /* convert to nsec */
        cfg_parms->nsecwindow = (uint64_t)cfg_parms->window *
            METER_MSEC_TO_NSEC;

        /* parse stats */
        if ((rc = nvlist_lookup_uint32(nvlp, IPP_ACTION_STATS_ENABLE, &bstats))
            != 0) {
                cfg_parms->stats = B_FALSE;
        } else {
                cfg_parms->stats = (boolean_t)bstats;
        }

        nvlist_free(nvlp);

        /* Initialize other stuff */
        tswtcl_data = kmem_zalloc(TSWTCL_DATA_SZ, KM_NOSLEEP);
        if (tswtcl_data == NULL) {
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (ENOMEM);
        }

        if (cfg_parms->stats) {
                if ((rc = tswtcl_statinit(aid, tswtcl_data)) != 0) {
                        kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                        kmem_free(tswtcl_data, TSWTCL_DATA_SZ);
                        return (rc);
                }
        }

        /* set action chain reference */
        if ((rc = ipp_action_ref(aid, cfg_parms->red_action, flags)) != 0) {
                tswtcl0dbg(("tswtcl_create_action: ipp_action_ref " \
                    "returned with error %d", rc));
                goto cleanup;
        }
        if ((rc = ipp_action_ref(aid, cfg_parms->yellow_action, flags)) != 0) {
                tswtcl0dbg(("tswtcl_create_action: ipp_action_ref " \
                    "returned with error %d", rc));
                rc2 = ipp_action_unref(aid, cfg_parms->red_action, flags);
                ASSERT(rc2 == 0);
                goto cleanup;
        }
        if ((rc = ipp_action_ref(aid, cfg_parms->green_action, flags)) != 0) {
                tswtcl0dbg(("tswtcl_create_action: ipp_action_ref " \
                    "returned with error %d", rc));
                rc2 = ipp_action_unref(aid, cfg_parms->red_action, flags);
                ASSERT(rc2 == 0);
                rc2 = ipp_action_unref(aid, cfg_parms->yellow_action, flags);
                ASSERT(rc2 == 0);
                goto cleanup;
        }

        /* Initializations */
        cfg_parms->pminusc = cfg_parms->peak_rate - cfg_parms->committed_rate;
        tswtcl_data->cfg_parms = cfg_parms;
        tswtcl_data->avg_rate = cfg_parms->committed_rate;
        mutex_init(&tswtcl_data->tswtcl_lock, NULL, MUTEX_DEFAULT, 0);
        tswtcl_data->win_front = gethrtime();
        ipp_action_set_ptr(aid, (void *)tswtcl_data);

        return (0);

cleanup:
        if (cfg_parms->stats) {
                ipp_stat_destroy(tswtcl_data->stats);
        }
        kmem_free(cfg_parms, TSWTCL_CFG_SZ);
        kmem_free(tswtcl_data, TSWTCL_DATA_SZ);
        return (rc);

}

static int
tswtcl_modify_action(ipp_action_id_t aid, nvlist_t **nvlpp, ipp_flags_t flags)
{

        nvlist_t *nvlp;
        int err = 0, err2;
        uint8_t config_type;
        char *next_action_name;
        ipp_action_id_t next_action;
        uint32_t rate;
        tswtcl_cfg_t *cfg_parms, *old_cfg;
        tswtcl_data_t *tswtcl_data;
        uint32_t bstats;

        nvlp = *nvlpp;
        *nvlpp = NULL;          /* nvlist should be NULL when this returns */

        if ((err = nvlist_lookup_byte(nvlp, IPP_CONFIG_TYPE, &config_type))
            != 0) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_modify_action:invalid configuration type"));
                return (err);
        }

        if (config_type != IPP_SET) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_modify_action:invalid configuration type " \
                    "%d", config_type));
                return (EINVAL);
        }

        tswtcl_data = (tswtcl_data_t *)ipp_action_get_ptr(aid);
        old_cfg = tswtcl_data->cfg_parms;

        cfg_parms = kmem_alloc(TSWTCL_CFG_SZ, KM_NOSLEEP);
        if (cfg_parms == NULL) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_modify_action:mem. allocation failure\n"));
                return (ENOMEM);
        }

        /* Just copy all and change as needed */
        bcopy(old_cfg, cfg_parms, TSWTCL_CFG_SZ);

        /* parse red action name, if present */
        if ((err = nvlist_lookup_string(nvlp, TSWTCL_RED_ACTION_NAME,
            &next_action_name)) == 0) {
                /* Get action id */
                if ((next_action = ipp_action_lookup(next_action_name))
                    == IPP_ACTION_INVAL) {
                        nvlist_free(nvlp);
                        tswtcl0dbg(("tswtcl_modify_action: red next_action"\
                            " invalid\n"));
                        kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                        return (EINVAL);
                }
                cfg_parms->red_action = next_action;
        }

        /* parse yellow action name, if present */
        if ((err = nvlist_lookup_string(nvlp, TSWTCL_YELLOW_ACTION_NAME,
            &next_action_name)) == 0) {
                /* Get action id */
                if ((next_action = ipp_action_lookup(next_action_name))
                    == IPP_ACTION_INVAL) {
                        nvlist_free(nvlp);
                        tswtcl0dbg(("tswtcl_modify_action: yellow next_action"\
                            "  invalid\n"));
                        kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                        return (EINVAL);
                }
                cfg_parms->yellow_action = next_action;
        }

        /* parse green action name, if present */
        if ((err = nvlist_lookup_string(nvlp, TSWTCL_GREEN_ACTION_NAME,
            &next_action_name)) == 0) {
                /* Get action id */
                if ((next_action = ipp_action_lookup(next_action_name))
                    == IPP_ACTION_INVAL) {
                        nvlist_free(nvlp);
                        tswtcl0dbg(("tswtcl_modify_action: green next_action"\
                            " invalid\n"));
                        kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                        return (EINVAL);
                }
                cfg_parms->green_action = next_action;
        }

        /* parse committed rate, if present */
        if ((err = nvlist_lookup_uint32(nvlp, TSWTCL_COMMITTED_RATE, &rate))
            == 0) {
                cfg_parms->committed_rate = rate;
        }

        /* parse peak rate, if present */
        if ((err = nvlist_lookup_uint32(nvlp, TSWTCL_PEAK_RATE, &rate))
            == 0) {
                cfg_parms->peak_rate = rate;
        }

        if (cfg_parms->peak_rate < cfg_parms->committed_rate) {
                nvlist_free(nvlp);
                tswtcl0dbg(("tswtcl_create_action: invalid config, "\
                    " peak rate < committed rate\n"));
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (EINVAL);
        }

        /* parse window - in msec */
        if ((err = nvlist_lookup_uint32(nvlp, TSWTCL_WINDOW,
            &cfg_parms->window)) != 0) {
                cfg_parms->nsecwindow = (uint64_t)cfg_parms->window *
                    METER_MSEC_TO_NSEC;
        }

        /* parse stats, if present */
        if (nvlist_lookup_uint32(nvlp, IPP_ACTION_STATS_ENABLE, &bstats) == 0) {
                cfg_parms->stats = (boolean_t)bstats;
                if (cfg_parms->stats && !old_cfg->stats) {
                        if ((err = tswtcl_statinit(aid, tswtcl_data)) != 0) {
                                nvlist_free(nvlp);
                                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                                return (err);
                        }
                } else if (!cfg_parms->stats && old_cfg->stats) {
                        ipp_stat_destroy(tswtcl_data->stats);
                }
        }

        /* Can we ref all the new actions? */
        if ((err = ipp_action_ref(aid, cfg_parms->red_action, flags)) != 0) {
                tswtcl0dbg(("tswtcl_modify_data: can't ref. red action\n"));
                nvlist_free(nvlp);
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (err);
        }

        if ((err = ipp_action_ref(aid, cfg_parms->yellow_action, flags)) != 0) {
                tswtcl0dbg(("tswtcl_modify_data:can't ref. yellow action\n"));
                nvlist_free(nvlp);
                err2 = ipp_action_unref(aid, cfg_parms->red_action, flags);
                ASSERT(err2 == 0);
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (err);
        }

        if ((err = ipp_action_ref(aid, cfg_parms->green_action, flags)) != 0) {
                tswtcl0dbg(("tswtcl_modify_data:can't ref. green action\n"));
                nvlist_free(nvlp);
                err2 = ipp_action_unref(aid, cfg_parms->red_action, flags);
                ASSERT(err2 == 0);
                err2 = ipp_action_unref(aid, cfg_parms->yellow_action, flags);
                ASSERT(err2 == 0);
                kmem_free(cfg_parms, TSWTCL_CFG_SZ);
                return (err);
        }

        /* Re-compute pminusc */
        cfg_parms->pminusc = cfg_parms->peak_rate - cfg_parms->committed_rate;

        /* Actually modify the configuration */
        mutex_enter(&tswtcl_data->tswtcl_lock);
        tswtcl_data->cfg_parms = cfg_parms;
        mutex_exit(&tswtcl_data->tswtcl_lock);

        /* Un-ref the old actions */
        err = ipp_action_unref(aid, old_cfg->red_action, flags);
        ASSERT(err == 0);
        err = ipp_action_unref(aid, old_cfg->yellow_action, flags);
        ASSERT(err == 0);
        err = ipp_action_unref(aid, old_cfg->green_action, flags);
        ASSERT(err == 0);

        /* Free the old configuration */
        kmem_free(old_cfg, TSWTCL_CFG_SZ);

        nvlist_free(nvlp);

        return (0);
}

static int
tswtcl_destroy_action(ipp_action_id_t aid, ipp_flags_t flags)
{
        tswtcl_data_t *tswtcl_data;
        tswtcl_cfg_t *cfg_parms;
        int rc;

        tswtcl_data = (tswtcl_data_t *)ipp_action_get_ptr(aid);
        ASSERT(tswtcl_data != NULL);

        cfg_parms = tswtcl_data->cfg_parms;

        if (cfg_parms->stats) {
                ipp_stat_destroy(tswtcl_data->stats);
        }

        /* unreference the action */
        rc = ipp_action_unref(aid, cfg_parms->red_action, flags);
        ASSERT(rc == 0);
        rc = ipp_action_unref(aid, cfg_parms->yellow_action, flags);
        ASSERT(rc == 0);
        rc = ipp_action_unref(aid, cfg_parms->green_action, flags);
        ASSERT(rc == 0);

        mutex_destroy(&tswtcl_data->tswtcl_lock);
        kmem_free(cfg_parms, TSWTCL_CFG_SZ);
        kmem_free(tswtcl_data, TSWTCL_DATA_SZ);
        return (0);
}

static int
tswtcl_invoke_action(ipp_action_id_t aid, ipp_packet_t *packet)
{
        tswtcl_data_t *tswtcl_data;
        ipp_action_id_t next_action;
        mblk_t *mp = NULL;
        int rc;

        /* get mblk from ipp_packet structure */
        mp = ipp_packet_get_data(packet);
        tswtcl_data = (tswtcl_data_t *)ipp_action_get_ptr(aid);
        ASSERT(tswtcl_data != NULL);

        /* tswtcl packet as configured */
        if ((rc = tswtcl_process(&mp, tswtcl_data, &next_action)) != 0) {
                return (rc);
        } else {
                return (ipp_packet_next(packet, next_action));
        }
}

static int
tswtcl_statinit(ipp_action_id_t aid, tswtcl_data_t *tswtcl_data)
{
        int rc = 0;
        meter_stat_t *statsp;

        /* install stats entry */
        if ((rc = ipp_stat_create(aid, TSWTCL_STATS_STRING, METER_STATS_COUNT,
            tswtcl_update_stats, tswtcl_data, &tswtcl_data->stats)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_create failed "\
                    " with %d\n", rc));
                return (rc);
        }

        statsp = (meter_stat_t *)(tswtcl_data->stats)->ipps_data;
        ASSERT(statsp != NULL);

        if ((rc = ipp_stat_named_init(tswtcl_data->stats, "red_packets",
            IPP_STAT_UINT64, &statsp->red_packets)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_create failed "\
                    " with %d\n", rc));
                return (rc);
        }
        if ((rc = ipp_stat_named_init(tswtcl_data->stats, "red_bits",
            IPP_STAT_UINT64, &statsp->red_bits)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_create failed "\
                    " with %d\n", rc));
                return (rc);
        }
        if ((rc = ipp_stat_named_init(tswtcl_data->stats, "yellow_packets",
            IPP_STAT_UINT64, &statsp->yellow_packets)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_named_init failed "\
                    " with %d\n", rc));
                return (rc);
        }
        if ((rc = ipp_stat_named_init(tswtcl_data->stats, "yellow_bits",
            IPP_STAT_UINT64, &statsp->yellow_bits)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_create failed "\
                    " with %d\n", rc));
                return (rc);
        }
        if ((rc = ipp_stat_named_init(tswtcl_data->stats, "green_packets",
            IPP_STAT_UINT64, &statsp->green_packets)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_named_init failed "\
                    " with %d\n", rc));
                return (rc);
        }
        if ((rc = ipp_stat_named_init(tswtcl_data->stats, "green_bits",
            IPP_STAT_UINT64, &statsp->green_bits)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_create failed "\
                    " with %d\n", rc));
                return (rc);
        }
        if ((rc = ipp_stat_named_init(tswtcl_data->stats, "epackets",
            IPP_STAT_UINT64, &statsp->epackets)) != 0) {
                tswtcl0dbg(("tswtcl_statinit:ipp_stat_named_init failed "\
                    " with %d\n", rc));
                return (rc);
        }
        ipp_stat_install(tswtcl_data->stats);

        return (rc);

}

static int
tswtcl_update_stats(ipp_stat_t *sp, void *args, int rw)
{
        tswtcl_data_t *tswtcl_data = (tswtcl_data_t *)args;
        meter_stat_t *stats = (meter_stat_t *)sp->ipps_data;

        ASSERT((tswtcl_data != NULL) && (stats != NULL));

        (void) ipp_stat_named_op(&stats->red_packets, &tswtcl_data->red_packets,
            rw);
        (void) ipp_stat_named_op(&stats->yellow_packets,
            &tswtcl_data->yellow_packets, rw);
        (void) ipp_stat_named_op(&stats->green_packets,
            &tswtcl_data->green_packets, rw);

        (void) ipp_stat_named_op(&stats->red_bits, &tswtcl_data->red_bits, rw);
        (void) ipp_stat_named_op(&stats->yellow_bits,
            &tswtcl_data->yellow_bits, rw);
        (void) ipp_stat_named_op(&stats->green_bits,
            &tswtcl_data->green_bits, rw);

        (void) ipp_stat_named_op(&stats->epackets, &tswtcl_data->epackets,
            rw);

        return (0);
}

/* ARGSUSED */
static int
tswtcl_info(ipp_action_id_t aid, int (*fn)(nvlist_t *, void *), void *arg,
    ipp_flags_t flags)
{
        nvlist_t *nvlp;
        tswtcl_data_t *tswtcl_data;
        tswtcl_cfg_t *cfg_parms;
        char *next_action;
        int rc;

        tswtcl_data = (tswtcl_data_t *)ipp_action_get_ptr(aid);
        ASSERT(tswtcl_data != NULL);

        cfg_parms = tswtcl_data->cfg_parms;

        /* allocate nvlist to be passed back */
        if ((rc = nvlist_alloc(&nvlp, NV_UNIQUE_NAME, KM_NOSLEEP)) != 0) {
                tswtcl0dbg(("tswtcl_info: memory allocation failure\n"));
                return (rc);
        }

        /* look up red next action with the next action id */
        if ((rc = ipp_action_name(cfg_parms->red_action, &next_action)) != 0) {
                tswtcl0dbg(("tswtcl_info: red action not available\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        /* add next action name */
        if ((rc = nvlist_add_string(nvlp, TSWTCL_RED_ACTION_NAME,
            next_action)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding\n"));
                nvlist_free(nvlp);
                kmem_free(next_action, (strlen(next_action) + 1));
                return (rc);
        }

        /* free action name */
        kmem_free(next_action, (strlen(next_action) + 1));

        /* look up yellow next action with the next action id */
        if ((rc = ipp_action_name(cfg_parms->yellow_action,
            &next_action)) != 0) {
                tswtcl0dbg(("tswtcl_info: yellow action not available\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        /* add next action name */
        if ((rc = nvlist_add_string(nvlp, TSWTCL_YELLOW_ACTION_NAME,
            next_action)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding yellow action\n"));
                nvlist_free(nvlp);
                kmem_free(next_action, (strlen(next_action) + 1));
                return (rc);
        }
        /* free action name */
        kmem_free(next_action, (strlen(next_action) + 1));

        /* look up green next action with the next action id */
        if ((rc = ipp_action_name(cfg_parms->green_action,
            &next_action)) != 0) {
                tswtcl0dbg(("tswtcl_info: green action not available\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        /* add next action name */
        if ((rc = nvlist_add_string(nvlp, TSWTCL_GREEN_ACTION_NAME,
            next_action)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding green action\n"));
                nvlist_free(nvlp);
                kmem_free(next_action, (strlen(next_action) + 1));
                return (rc);
        }

        /* free action name */
        kmem_free(next_action, (strlen(next_action) + 1));

        /* add config type */
        if ((rc = nvlist_add_byte(nvlp, IPP_CONFIG_TYPE, IPP_SET)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding config_type\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        /* add committed_rate  */
        if ((rc = nvlist_add_uint32(nvlp, TSWTCL_COMMITTED_RATE,
            cfg_parms->committed_rate)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding committed_rate\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        /* add peak_rate  */
        if ((rc = nvlist_add_uint32(nvlp, TSWTCL_PEAK_RATE,
            cfg_parms->peak_rate)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding peak_rate\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        /* add window  */
        if ((rc = nvlist_add_uint32(nvlp, TSWTCL_WINDOW,
            cfg_parms->window)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding window\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        if ((rc = nvlist_add_uint32(nvlp, IPP_ACTION_STATS_ENABLE,
            (uint32_t)(uintptr_t)tswtcl_data->stats)) != 0) {
                tswtcl0dbg(("tswtcl_info: error adding stats status\n"));
                nvlist_free(nvlp);
                return (rc);
        }

        /* call back with nvlist */
        rc = fn(nvlp, arg);

        nvlist_free(nvlp);
        return (rc);
}