This patch adds support for RFC4115 trTCM meters.
Signed-off-by: Eelco Chaudron <echau...@redhat.com>
---
lib/librte_meter/rte_meter.c | 40 +++++++++
lib/librte_meter/rte_meter.h | 193 +++++++++++++++++++++++++++++++++++++++---
2 files changed, 217 insertions(+), 16 deletions(-)
diff --git a/lib/librte_meter/rte_meter.c b/lib/librte_meter/rte_meter.c
index 473f69aba..aeeac69fe 100644
--- a/lib/librte_meter/rte_meter.c
+++ b/lib/librte_meter/rte_meter.c
@@ -110,3 +110,43 @@ rte_meter_trtcm_config(struct rte_meter_trtcm *m,
return 0;
}
+
+int
+rte_meter_trtcm_rfc4115_profile_config(struct rte_meter_trtcm_profile *p,
+ struct rte_meter_trtcm_params *params)
+{
+ uint64_t hz = rte_get_tsc_hz();
+
+ /* Check input parameters */
+ if ((p == NULL) ||
+ (params == NULL) ||
+ (params->cir != 0 && params->cbs == 0) ||
+ (params->eir != 0 && params->ebs == 0))
+ return -EINVAL;
+
+ /* Initialize trTCM run-time structure */
+ p->cbs = params->cbs;
+ p->ebs = params->ebs;
+ rte_meter_get_tb_params(hz, params->cir, &p->cir_period,
+ &p->cir_bytes_per_period);
+ rte_meter_get_tb_params(hz, params->eir, &p->eir_period,
+ &p->eir_bytes_per_period);
+
+ return 0;
+}
+
+int
+rte_meter_trtcm_rfc4115_config(struct rte_meter_trtcm *m,
+ struct rte_meter_trtcm_profile *p)
+{
+ /* Check input parameters */
+ if ((m == NULL) || (p == NULL))
+ return -EINVAL;
+
+ /* Initialize trTCM run-time structure */
+ m->time_tc = m->time_te = rte_get_tsc_cycles();
+ m->tc = p->cbs;
+ m->te = p->ebs;
+
+ return 0;
+}
diff --git a/lib/librte_meter/rte_meter.h b/lib/librte_meter/rte_meter.h
index 58a051583..ff1ca3f77 100644
--- a/lib/librte_meter/rte_meter.h
+++ b/lib/librte_meter/rte_meter.h
@@ -16,6 +16,7 @@ extern "C" {
* Traffic metering algorithms:
* 1. Single Rate Three Color Marker (srTCM): defined by IETF RFC 2697
* 2. Two Rate Three Color Marker (trTCM): defined by IETF RFC 2698
+ * 3. Two Rate Three Color Marker (trTCM): defined by IETF RFC 4115
*
***/
@@ -43,14 +44,25 @@ struct rte_meter_srtcm_params {
uint64_t ebs; /**< Excess Burst Size (EBS). Measured in bytes. */
};
-/** trTCM parameters per metered traffic flow. The CIR, PIR, CBS and PBS
parameters
-only count bytes of IP packets and do not include link specific headers. PIR
has to
-be greater than or equal to CIR. Both CBS or EBS have to be greater than zero.
*/
+/** trTCM parameters per metered traffic flow. The CIR, PIR/EIT, CBS and
PBS/EBS
+parameters only count bytes of IP packets and do not include link specific
+headers.
+
+- For RFC2698 operations PIR has to be greater than or equal to CIR. Both CBS
+ or EBS have to be greater than zero.
+- For RFC4115 operations CBS and EBS need to be greater than zero if CIR and
+ EIR are none-zero respectively.*/
struct rte_meter_trtcm_params {
uint64_t cir; /**< Committed Information Rate (CIR). Measured in bytes
per second. */
- uint64_t pir; /**< Peak Information Rate (PIR). Measured in bytes per
second. */
- uint64_t cbs; /**< Committed Burst Size (CBS). Measured in byes. */
- uint64_t pbs; /**< Peak Burst Size (PBS). Measured in bytes. */
+ union {
+ uint64_t pir; /**< Peak Information Rate (PIR). Measured in
bytes per second. */
+ uint64_t eir; /**< Excess Information Rate (EIR). Measured in
bytes per second. */
+ };
+ uint64_t cbs; /**< Committed Burst Size (CBS). Measured in bytes. */
+ union {
+ uint64_t pbs; /**< Peak Burst Size (PBS). Measured in bytes. */
+ uint64_t ebs; /**< Excess Burst Size (EBS). Measured in bytes.
*/
+ };
};
/**
@@ -98,6 +110,19 @@ rte_meter_srtcm_profile_config(struct
rte_meter_srtcm_profile *p,
int
rte_meter_trtcm_profile_config(struct rte_meter_trtcm_profile *p,
struct rte_meter_trtcm_params *params);
+/**
+ * trTCM RFC 4115 profile configuration
+ *
+ * @param p
+ * Pointer to pre-allocated trTCM profile data structure
+ * @param params
+ * trTCM profile parameters
+ * @return
+ * 0 upon success, error code otherwise
+ */
+int
+rte_meter_trtcm_rfc4115_profile_config(struct rte_meter_trtcm_profile *p,
+ struct rte_meter_trtcm_params *params);
/**
* srTCM configuration per metered traffic flow
@@ -127,6 +152,20 @@ int
rte_meter_trtcm_config(struct rte_meter_trtcm *m,
struct rte_meter_trtcm_profile *p);
+/**
+ * trTCM RFC 4115 configuration per metered traffic flow
+ *
+ * @param m
+ * Pointer to pre-allocated trTCM data structure
+ * @param p
+ * trTCM profile. Needs to be valid.
+ * @return
+ * 0 upon success, error code otherwise
+ */
+int
+rte_meter_trtcm_rfc4115_config(struct rte_meter_trtcm *m,
+ struct rte_meter_trtcm_profile *p);
+
/**
* srTCM color blind traffic metering
*
@@ -213,6 +252,49 @@ rte_meter_trtcm_color_aware_check(struct rte_meter_trtcm
*m,
uint32_t pkt_len,
enum rte_meter_color pkt_color);
+/**
+ * trTCM RFC4115 color blind traffic metering
+ *
+ * @param m
+ * Handle to trTCM instance
+ * @param p
+ * trTCM profile specified at trTCM object creation time
+ * @param time
+ * Current CPU time stamp (measured in CPU cycles)
+ * @param pkt_len
+ * Length of the current IP packet (measured in bytes)
+ * @return
+ * Color assigned to the current IP packet
+ */
+static inline enum rte_meter_color
+rte_meter_trtcm_rfc4115_color_blind_check(struct rte_meter_trtcm *m,
+ struct rte_meter_trtcm_profile *p,
+ uint64_t time,
+ uint32_t pkt_len);
+
+/**
+ * trTCM RFC4115 color aware traffic metering
+ *
+ * @param m
+ * Handle to trTCM instance
+ * @param p
+ * trTCM profile specified at trTCM object creation time
+ * @param time
+ * Current CPU time stamp (measured in CPU cycles)
+ * @param pkt_len
+ * Length of the current IP packet (measured in bytes)
+ * @param pkt_color
+ * Input color of the current IP packet
+ * @return
+ * Color assigned to the current IP packet
+ */
+static inline enum rte_meter_color
+rte_meter_trtcm_rfc4115_color_aware_check(struct rte_meter_trtcm *m,
+ struct rte_meter_trtcm_profile *p,
+ uint64_t time,
+ uint32_t pkt_len,
+ enum rte_meter_color pkt_color);
+
/*
* Inline implementation of run-time methods
*
@@ -239,16 +321,28 @@ struct rte_meter_srtcm {
struct rte_meter_trtcm_profile {
uint64_t cbs;
/**< Upper limit for C token bucket */
- uint64_t pbs;
- /**< Upper limit for P token bucket */
+ union {
+ uint64_t pbs;
+ /**< Upper limit for P token bucket */
+ uint64_t ebs;
+ /**< Upper limit for E token bucket */
+ };
uint64_t cir_period;
/**< Number of CPU cycles for one update of C token bucket */
uint64_t cir_bytes_per_period;
/**< Number of bytes to add to C token bucket on each update */
- uint64_t pir_period;
- /**< Number of CPU cycles for one update of P token bucket */
- uint64_t pir_bytes_per_period;
- /**< Number of bytes to add to P token bucket on each update */
+ union {
+ uint64_t pir_period;
+ /**< Number of CPU cycles for one update of P token bucket */
+ uint64_t eir_period;
+ /**< Number of CPU cycles for one update of E token bucket */
+ };
+ union {
+ uint64_t pir_bytes_per_period;
+ /**< Number of bytes to add to P token bucket on each update */
+ uint64_t eir_bytes_per_period;
+ /**< Number of bytes to add to E token bucket on each update */
+ };
};
/**
@@ -258,12 +352,20 @@ struct rte_meter_trtcm_profile {
struct rte_meter_trtcm {
uint64_t time_tc;
/**< Time of latest update of C token bucket */
- uint64_t time_tp;
- /**< Time of latest update of E token bucket */
+ union {
+ uint64_t time_tp;
+ /**< Time of latest update of P token bucket */
+ uint64_t time_te;
+ /**< Time of latest update of E token bucket */
+ };
uint64_t tc;
/**< Number of bytes currently available in committed(C) token bucket */
- uint64_t tp;
- /**< Number of bytes currently available in the peak(P) token bucket */
+ union {
+ uint64_t tp;
+ /**< Number of bytes currently available in the peak(P) token
bucket */
+ uint64_t te;
+ /**< Number of bytes currently available in the excess(E) token
bucket */
+ };
};
static inline enum rte_meter_color
@@ -434,6 +536,65 @@ rte_meter_trtcm_color_aware_check(struct rte_meter_trtcm
*m,
return e_RTE_METER_GREEN;
}
+static inline enum rte_meter_color
+rte_meter_trtcm_rfc4115_color_blind_check(struct rte_meter_trtcm *m,
+ struct rte_meter_trtcm_profile *p,
+ uint64_t time,
+ uint32_t pkt_len)
+{
+ return rte_meter_trtcm_rfc4115_color_aware_check(m, p, time, pkt_len,
+ e_RTE_METER_GREEN);
+}
+
+static inline enum rte_meter_color
+rte_meter_trtcm_rfc4115_color_aware_check(struct rte_meter_trtcm *m,
+ struct rte_meter_trtcm_profile *p,
+ uint64_t time,
+ uint32_t pkt_len,
+ enum rte_meter_color pkt_color)
+{
+ uint64_t time_diff_tc, time_diff_te, n_periods_tc, n_periods_te, tc, te;
+
+ /* Bucket update */
+ time_diff_tc = time - m->time_tc;
+ time_diff_te = time - m->time_te;
+ n_periods_tc = time_diff_tc / p->cir_period;
+ n_periods_te = time_diff_te / p->eir_period;
+ m->time_tc += n_periods_tc * p->cir_period;
+ m->time_te += n_periods_te * p->eir_period;
+
+ tc = m->tc + n_periods_tc * p->cir_bytes_per_period;
+ if (tc > p->cbs)
+ tc = p->cbs;
+
+ te = m->te + n_periods_te * p->eir_bytes_per_period;
+ if (te > p->ebs)
+ te = p->ebs;
+
+ /* Color logic */
+ if (pkt_color == e_RTE_METER_GREEN) {
+ if (tc >= pkt_len) {
+ m->tc = tc - pkt_len;
+ m->te = te;
+ return e_RTE_METER_GREEN;
+ } else if (te >= pkt_len) {
+ m->tc = tc;
+ m->te = te - pkt_len;
+ return e_RTE_METER_YELLOW;
+ }
+ } else if (pkt_color == e_RTE_METER_YELLOW && te >= pkt_len) {
+ m->tc = tc;
+ m->te = te - pkt_len;
+ return e_RTE_METER_YELLOW;
+ }
+
+ /* If we end up here the color is RED */
+ m->tc = tc;
+ m->te = te;
+ return e_RTE_METER_RED;
+}
+
+
#ifdef __cplusplus
}
#endif
