ebe3a76991
RFC 4115 allows a meter with either cir and/or eir configured.
When only one is configured a divide by zero would occur.
Fixes: 655796d2b5 ("meter: support RFC4115 trTCM")
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
163 lines
3.5 KiB
C
163 lines
3.5 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#include <inttypes.h>
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#include <stdio.h>
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#include <math.h>
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#include <rte_common.h>
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#include <rte_log.h>
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#include <rte_cycles.h>
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#include "rte_meter.h"
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#ifndef RTE_METER_TB_PERIOD_MIN
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#define RTE_METER_TB_PERIOD_MIN 100
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#endif
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static void
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rte_meter_get_tb_params(uint64_t hz, uint64_t rate, uint64_t *tb_period, uint64_t *tb_bytes_per_period)
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{
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double period;
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if (rate == 0) {
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*tb_bytes_per_period = 0;
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*tb_period = RTE_METER_TB_PERIOD_MIN;
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return;
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}
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period = ((double) hz) / ((double) rate);
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if (period >= RTE_METER_TB_PERIOD_MIN) {
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*tb_bytes_per_period = 1;
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*tb_period = (uint64_t) period;
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} else {
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*tb_bytes_per_period = (uint64_t) ceil(RTE_METER_TB_PERIOD_MIN / period);
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*tb_period = (hz * (*tb_bytes_per_period)) / rate;
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}
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}
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int
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rte_meter_srtcm_profile_config(struct rte_meter_srtcm_profile *p,
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struct rte_meter_srtcm_params *params)
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{
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uint64_t hz = rte_get_tsc_hz();
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/* Check input parameters */
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if ((p == NULL) ||
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(params == NULL) ||
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(params->cir == 0) ||
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((params->cbs == 0) && (params->ebs == 0)))
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return -EINVAL;
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/* Initialize srTCM run-time structure */
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p->cbs = params->cbs;
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p->ebs = params->ebs;
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rte_meter_get_tb_params(hz, params->cir, &p->cir_period,
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&p->cir_bytes_per_period);
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return 0;
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}
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int
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rte_meter_srtcm_config(struct rte_meter_srtcm *m,
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struct rte_meter_srtcm_profile *p)
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{
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/* Check input parameters */
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if ((m == NULL) || (p == NULL))
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return -EINVAL;
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/* Initialize srTCM run-time structure */
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m->time = rte_get_tsc_cycles();
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m->tc = p->cbs;
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m->te = p->ebs;
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return 0;
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}
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int
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rte_meter_trtcm_profile_config(struct rte_meter_trtcm_profile *p,
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struct rte_meter_trtcm_params *params)
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{
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uint64_t hz = rte_get_tsc_hz();
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/* Check input parameters */
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if ((p == NULL) ||
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(params == NULL) ||
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(params->cir == 0) ||
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(params->pir == 0) ||
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(params->pir < params->cir) ||
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(params->cbs == 0) ||
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(params->pbs == 0))
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return -EINVAL;
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/* Initialize trTCM run-time structure */
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p->cbs = params->cbs;
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p->pbs = params->pbs;
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rte_meter_get_tb_params(hz, params->cir, &p->cir_period,
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&p->cir_bytes_per_period);
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rte_meter_get_tb_params(hz, params->pir, &p->pir_period,
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&p->pir_bytes_per_period);
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return 0;
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}
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int
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rte_meter_trtcm_config(struct rte_meter_trtcm *m,
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struct rte_meter_trtcm_profile *p)
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{
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/* Check input parameters */
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if ((m == NULL) || (p == NULL))
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return -EINVAL;
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/* Initialize trTCM run-time structure */
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m->time_tc = m->time_tp = rte_get_tsc_cycles();
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m->tc = p->cbs;
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m->tp = p->pbs;
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return 0;
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}
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int __rte_experimental
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rte_meter_trtcm_rfc4115_profile_config(
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struct rte_meter_trtcm_rfc4115_profile *p,
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struct rte_meter_trtcm_rfc4115_params *params)
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{
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uint64_t hz = rte_get_tsc_hz();
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/* Check input parameters */
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if ((p == NULL) ||
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(params == NULL) ||
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(params->cir != 0 && params->cbs == 0) ||
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(params->eir != 0 && params->ebs == 0))
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return -EINVAL;
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/* Initialize trTCM run-time structure */
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p->cbs = params->cbs;
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p->ebs = params->ebs;
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rte_meter_get_tb_params(hz, params->cir, &p->cir_period,
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&p->cir_bytes_per_period);
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rte_meter_get_tb_params(hz, params->eir, &p->eir_period,
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&p->eir_bytes_per_period);
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return 0;
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}
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int __rte_experimental
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rte_meter_trtcm_rfc4115_config(
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struct rte_meter_trtcm_rfc4115 *m,
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struct rte_meter_trtcm_rfc4115_profile *p)
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{
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/* Check input parameters */
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if ((m == NULL) || (p == NULL))
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return -EINVAL;
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/* Initialize trTCM run-time structure */
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m->time_tc = m->time_te = rte_get_tsc_cycles();
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m->tc = p->cbs;
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m->te = p->ebs;
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return 0;
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}
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