[PATCH v3 1/4] telemetry: support boolean type

[David Marchand <david.marchand@redhat.com>]

Add the boolean type RTE_TEL_BOOL_VAL for values in arrays and dicts.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Ciara Power <ciara.power@intel.com>
---
Changes since v1:
- fixed doxygen description,

---
 app/test/test_telemetry_data.c | 88 +++++++++++++++++++++++++++++++++-
 lib/telemetry/rte_telemetry.h  | 36 ++++++++++++++
 lib/telemetry/telemetry.c      | 24 +++++++++-
 lib/telemetry/telemetry_data.c | 44 +++++++++++++++--
 lib/telemetry/telemetry_data.h |  5 ++
 lib/telemetry/telemetry_json.h | 34 +++++++++++++
 lib/telemetry/version.map      | 10 ++++
 7 files changed, 233 insertions(+), 8 deletions(-)

diff --git a/app/test/test_telemetry_data.c b/app/test/test_telemetry_data.c
index d92667a527..134e018fde 100644
--- a/app/test/test_telemetry_data.c
+++ b/app/test/test_telemetry_data.c
@@ -353,6 +353,84 @@ test_array_with_array_u64_values(void)
 	return CHECK_OUTPUT("[[0,1,2,3,4],[0,1,2,3,4]]");
 }
 
+static int
+test_case_array_bool(void)
+{
+	int i;
+
+	rte_tel_data_start_array(&response_data, RTE_TEL_BOOL_VAL);
+	for (i = 0; i < 5; i++)
+		rte_tel_data_add_array_bool(&response_data, (i % 2) == 0);
+	return CHECK_OUTPUT("[true,false,true,false,true]");
+}
+
+static int
+test_case_add_dict_bool(void)
+{
+	int i = 0;
+	char name_of_value[8];
+
+	rte_tel_data_start_dict(&response_data);
+
+	for (i = 0; i < 5; i++) {
+		sprintf(name_of_value, "dict_%d", i);
+		rte_tel_data_add_dict_bool(&response_data, name_of_value,
+			(i % 2) == 0);
+	}
+	return CHECK_OUTPUT("{\"dict_0\":true,\"dict_1\":false,\"dict_2\":true,"
+		"\"dict_3\":false,\"dict_4\":true}");
+}
+
+static int
+test_dict_with_array_bool_values(void)
+{
+	int i;
+
+	struct rte_tel_data *child_data = rte_tel_data_alloc();
+	rte_tel_data_start_array(child_data, RTE_TEL_BOOL_VAL);
+
+	struct rte_tel_data *child_data2 = rte_tel_data_alloc();
+	rte_tel_data_start_array(child_data2, RTE_TEL_BOOL_VAL);
+
+	rte_tel_data_start_dict(&response_data);
+
+	for (i = 0; i < 10; i++) {
+		rte_tel_data_add_array_bool(child_data, (i % 2) == 0);
+		rte_tel_data_add_array_bool(child_data2, (i % 2) == 1);
+	}
+
+	rte_tel_data_add_dict_container(&response_data, "dict_0",
+	 child_data, 0);
+	rte_tel_data_add_dict_container(&response_data, "dict_1",
+	 child_data2, 0);
+
+	return CHECK_OUTPUT("{\"dict_0\":[true,false,true,false,true,false,true,false,true,false],"
+		"\"dict_1\":[false,true,false,true,false,true,false,true,false,true]}");
+}
+
+static int
+test_array_with_array_bool_values(void)
+{
+	int i;
+
+	struct rte_tel_data *child_data = rte_tel_data_alloc();
+	rte_tel_data_start_array(child_data, RTE_TEL_BOOL_VAL);
+
+	struct rte_tel_data *child_data2 = rte_tel_data_alloc();
+	rte_tel_data_start_array(child_data2, RTE_TEL_BOOL_VAL);
+
+	rte_tel_data_start_array(&response_data, RTE_TEL_CONTAINER);
+
+	for (i = 0; i < 5; i++) {
+		rte_tel_data_add_array_bool(child_data, (i % 2) == 0);
+		rte_tel_data_add_array_bool(child_data2, (i % 2) == 1);
+	}
+	rte_tel_data_add_array_container(&response_data, child_data, 0);
+	rte_tel_data_add_array_container(&response_data, child_data2, 0);
+
+	return CHECK_OUTPUT("[[true,false,true,false,true],[false,true,false,true,false]]");
+}
+
 static int
 test_string_char_escaping(void)
 {
@@ -428,15 +506,21 @@ telemetry_data_autotest(void)
 			test_null_return,
 			test_simple_string,
 			test_case_array_string,
-			test_case_array_int, test_case_array_u64,
-			test_case_add_dict_int, test_case_add_dict_u64,
+			test_case_array_int,
+			test_case_array_u64,
+			test_case_array_bool,
+			test_case_add_dict_int,
+			test_case_add_dict_u64,
+			test_case_add_dict_bool,
 			test_case_add_dict_string,
 			test_dict_with_array_int_values,
 			test_dict_with_array_u64_values,
+			test_dict_with_array_bool_values,
 			test_dict_with_array_string_values,
 			test_dict_with_dict_values,
 			test_array_with_array_int_values,
 			test_array_with_array_u64_values,
+			test_array_with_array_bool_values,
 			test_array_with_array_string_values,
 			test_string_char_escaping,
 			test_array_char_escaping,
diff --git a/lib/telemetry/rte_telemetry.h b/lib/telemetry/rte_telemetry.h
index a0d21d6b7f..e7f6c2ae43 100644
--- a/lib/telemetry/rte_telemetry.h
+++ b/lib/telemetry/rte_telemetry.h
@@ -2,6 +2,7 @@
  * Copyright(c) 2018 Intel Corporation
  */
 
+#include <stdbool.h>
 #include <stdint.h>
 
 #include <rte_compat.h>
@@ -46,6 +47,7 @@ enum rte_tel_value_type {
 	RTE_TEL_INT_VAL,    /** a signed 32-bit int value */
 	RTE_TEL_U64_VAL,    /** an unsigned 64-bit int value */
 	RTE_TEL_CONTAINER, /** a container struct */
+	RTE_TEL_BOOL_VAL,   /** a boolean value */
 };
 
 /**
@@ -155,6 +157,22 @@ int
 rte_tel_data_add_array_container(struct rte_tel_data *d,
 		struct rte_tel_data *val, int keep);
 
+/**
+ * Add a boolean to an array.
+ * The array must have been started by rte_tel_data_start_array() with
+ * RTE_TEL_BOOL_VAL as the type parameter.
+ *
+ * @param d
+ *   The data structure passed to the callback
+ * @param x
+ *   The boolean value to be returned in the array
+ * @return
+ *   0 on success, negative errno on error
+ */
+__rte_experimental
+int
+rte_tel_data_add_array_bool(struct rte_tel_data *d, bool x);
+
 /**
  * Add a string value to a dictionary.
  * The dict must have been started by rte_tel_data_start_dict().
@@ -233,6 +251,24 @@ int
 rte_tel_data_add_dict_container(struct rte_tel_data *d, const char *name,
 		struct rte_tel_data *val, int keep);
 
+/**
+ * Add a boolean value to a dictionary.
+ * The dict must have been started by rte_tel_data_start_dict().
+ *
+ * @param d
+ *   The data structure passed to the callback
+ * @param name
+ *   The name the value is to be stored under in the dict
+ *   Must contain only alphanumeric characters or the symbols: '_' or '/'
+ * @param val
+ *   The boolean value to be stored in the dict
+ * @return
+ *   0 on success, negative errno on error, E2BIG on string truncation of name.
+ */
+__rte_experimental
+int
+rte_tel_data_add_dict_bool(struct rte_tel_data *d, const char *name, bool val);
+
 /**
  * This telemetry callback is used when registering a telemetry command.
  * It handles getting and formatting information to be returned to telemetry
diff --git a/lib/telemetry/telemetry.c b/lib/telemetry/telemetry.c
index 8fbb4f3060..276d0f337d 100644
--- a/lib/telemetry/telemetry.c
+++ b/lib/telemetry/telemetry.c
@@ -168,7 +168,9 @@ container_to_json(const struct rte_tel_data *d, char *out_buf, size_t buf_len)
 	unsigned int i;
 
 	if (d->type != RTE_TEL_DICT && d->type != RTE_TEL_ARRAY_U64 &&
-		d->type != RTE_TEL_ARRAY_INT && d->type != RTE_TEL_ARRAY_STRING)
+			d->type != RTE_TEL_ARRAY_INT &&
+			d->type != RTE_TEL_ARRAY_STRING &&
+			d->type != RTE_TEL_ARRAY_BOOL)
 		return snprintf(out_buf, buf_len, "null");
 
 	used = rte_tel_json_empty_array(out_buf, buf_len, 0);
@@ -187,6 +189,11 @@ container_to_json(const struct rte_tel_data *d, char *out_buf, size_t buf_len)
 			used = rte_tel_json_add_array_string(out_buf,
 				buf_len, used,
 				d->data.array[i].sval);
+	if (d->type == RTE_TEL_ARRAY_BOOL)
+		for (i = 0; i < d->data_len; i++)
+			used = rte_tel_json_add_array_bool(out_buf,
+				buf_len, used,
+				d->data.array[i].boolval);
 	if (d->type == RTE_TEL_DICT)
 		for (i = 0; i < d->data_len; i++) {
 			const struct tel_dict_entry *v = &d->data.dict[i];
@@ -206,6 +213,11 @@ container_to_json(const struct rte_tel_data *d, char *out_buf, size_t buf_len)
 						buf_len, used,
 						v->name, v->value.u64val);
 				break;
+			case RTE_TEL_BOOL_VAL:
+				used = rte_tel_json_add_obj_bool(out_buf,
+						buf_len, used,
+						v->name, v->value.boolval);
+				break;
 			case RTE_TEL_CONTAINER:
 			{
 				char temp[buf_len];
@@ -273,6 +285,11 @@ output_json(const char *cmd, const struct rte_tel_data *d, int s)
 						buf_len, used,
 						v->name, v->value.u64val);
 				break;
+			case RTE_TEL_BOOL_VAL:
+				used = rte_tel_json_add_obj_bool(cb_data_buf,
+						buf_len, used,
+						v->name, v->value.boolval);
+				break;
 			case RTE_TEL_CONTAINER:
 			{
 				char temp[buf_len];
@@ -294,6 +311,7 @@ output_json(const char *cmd, const struct rte_tel_data *d, int s)
 	case RTE_TEL_ARRAY_STRING:
 	case RTE_TEL_ARRAY_INT:
 	case RTE_TEL_ARRAY_U64:
+	case RTE_TEL_ARRAY_BOOL:
 	case RTE_TEL_ARRAY_CONTAINER:
 		used = rte_tel_json_empty_array(cb_data_buf, buf_len, 0);
 		for (i = 0; i < d->data_len; i++)
@@ -310,6 +328,10 @@ output_json(const char *cmd, const struct rte_tel_data *d, int s)
 				used = rte_tel_json_add_array_u64(cb_data_buf,
 						buf_len, used,
 						d->data.array[i].u64val);
+			else if (d->type == RTE_TEL_ARRAY_BOOL)
+				used = rte_tel_json_add_array_bool(cb_data_buf,
+						buf_len, used,
+						d->data.array[i].boolval);
 			else if (d->type == RTE_TEL_ARRAY_CONTAINER) {
 				char temp[buf_len];
 				const struct container *rec_data =
diff --git a/lib/telemetry/telemetry_data.c b/lib/telemetry/telemetry_data.c
index 34366ecee3..13a7ce7034 100644
--- a/lib/telemetry/telemetry_data.c
+++ b/lib/telemetry/telemetry_data.c
@@ -16,10 +16,11 @@ int
 rte_tel_data_start_array(struct rte_tel_data *d, enum rte_tel_value_type type)
 {
 	enum tel_container_types array_types[] = {
-			RTE_TEL_ARRAY_STRING, /* RTE_TEL_STRING_VAL = 0 */
-			RTE_TEL_ARRAY_INT,    /* RTE_TEL_INT_VAL = 1 */
-			RTE_TEL_ARRAY_U64,    /* RTE_TEL_u64_VAL = 2 */
-			RTE_TEL_ARRAY_CONTAINER, /* RTE_TEL_CONTAINER = 3 */
+		[RTE_TEL_STRING_VAL] = RTE_TEL_ARRAY_STRING,
+		[RTE_TEL_INT_VAL] = RTE_TEL_ARRAY_INT,
+		[RTE_TEL_U64_VAL] = RTE_TEL_ARRAY_U64,
+		[RTE_TEL_CONTAINER] = RTE_TEL_ARRAY_CONTAINER,
+		[RTE_TEL_BOOL_VAL] = RTE_TEL_ARRAY_BOOL,
 	};
 	d->type = array_types[type];
 	d->data_len = 0;
@@ -80,6 +81,17 @@ rte_tel_data_add_array_u64(struct rte_tel_data *d, uint64_t x)
 	return 0;
 }
 
+int
+rte_tel_data_add_array_bool(struct rte_tel_data *d, bool x)
+{
+	if (d->type != RTE_TEL_ARRAY_BOOL)
+		return -EINVAL;
+	if (d->data_len >= RTE_TEL_MAX_ARRAY_ENTRIES)
+		return -ENOSPC;
+	d->data.array[d->data_len++].boolval = x;
+	return 0;
+}
+
 int
 rte_tel_data_add_array_container(struct rte_tel_data *d,
 		struct rte_tel_data *val, int keep)
@@ -87,7 +99,8 @@ rte_tel_data_add_array_container(struct rte_tel_data *d,
 	if (d->type != RTE_TEL_ARRAY_CONTAINER ||
 			(val->type != RTE_TEL_ARRAY_U64
 			&& val->type != RTE_TEL_ARRAY_INT
-			&& val->type != RTE_TEL_ARRAY_STRING))
+			&& val->type != RTE_TEL_ARRAY_STRING
+			&& val->type != RTE_TEL_ARRAY_BOOL))
 		return -EINVAL;
 	if (d->data_len >= RTE_TEL_MAX_ARRAY_ENTRIES)
 		return -ENOSPC;
@@ -179,6 +192,26 @@ rte_tel_data_add_dict_u64(struct rte_tel_data *d,
 	return bytes < RTE_TEL_MAX_STRING_LEN ? 0 : E2BIG;
 }
 
+int
+rte_tel_data_add_dict_bool(struct rte_tel_data *d,
+		const char *name, bool val)
+{
+	struct tel_dict_entry *e = &d->data.dict[d->data_len];
+	if (d->type != RTE_TEL_DICT)
+		return -EINVAL;
+	if (d->data_len >= RTE_TEL_MAX_DICT_ENTRIES)
+		return -ENOSPC;
+
+	if (!valid_name(name))
+		return -EINVAL;
+
+	d->data_len++;
+	e->type = RTE_TEL_BOOL_VAL;
+	e->value.boolval = val;
+	const size_t bytes = strlcpy(e->name, name, RTE_TEL_MAX_STRING_LEN);
+	return bytes < RTE_TEL_MAX_STRING_LEN ? 0 : E2BIG;
+}
+
 int
 rte_tel_data_add_dict_container(struct rte_tel_data *d, const char *name,
 		struct rte_tel_data *val, int keep)
@@ -188,6 +221,7 @@ rte_tel_data_add_dict_container(struct rte_tel_data *d, const char *name,
 	if (d->type != RTE_TEL_DICT || (val->type != RTE_TEL_ARRAY_U64
 			&& val->type != RTE_TEL_ARRAY_INT
 			&& val->type != RTE_TEL_ARRAY_STRING
+			&& val->type != RTE_TEL_ARRAY_BOOL
 			&& val->type != RTE_TEL_DICT))
 		return -EINVAL;
 	if (d->data_len >= RTE_TEL_MAX_DICT_ENTRIES)
diff --git a/lib/telemetry/telemetry_data.h b/lib/telemetry/telemetry_data.h
index 26aa28e72c..c840486b18 100644
--- a/lib/telemetry/telemetry_data.h
+++ b/lib/telemetry/telemetry_data.h
@@ -5,6 +5,9 @@
 #ifndef _TELEMETRY_DATA_H_
 #define _TELEMETRY_DATA_H_
 
+#include <stdbool.h>
+#include <stdint.h>
+
 #include "rte_telemetry.h"
 
 enum tel_container_types {
@@ -15,6 +18,7 @@ enum tel_container_types {
 	RTE_TEL_ARRAY_INT,    /** array of signed, 32-bit int values */
 	RTE_TEL_ARRAY_U64,    /** array of unsigned 64-bit int values */
 	RTE_TEL_ARRAY_CONTAINER, /** array of container structs */
+	RTE_TEL_ARRAY_BOOL,   /** array of boolean values */
 };
 
 struct container {
@@ -30,6 +34,7 @@ union tel_value {
 	char sval[RTE_TEL_MAX_STRING_LEN];
 	int ival;
 	uint64_t u64val;
+	bool boolval;
 	struct container container;
 };
 
diff --git a/lib/telemetry/telemetry_json.h b/lib/telemetry/telemetry_json.h
index e3fae7c30d..c97da97366 100644
--- a/lib/telemetry/telemetry_json.h
+++ b/lib/telemetry/telemetry_json.h
@@ -7,6 +7,7 @@
 
 #include <inttypes.h>
 #include <stdarg.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <rte_common.h>
 #include <rte_telemetry.h>
@@ -159,6 +160,21 @@ rte_tel_json_add_array_u64(char *buf, const int len, const int used,
 	return ret == 0 ? used : end + ret;
 }
 
+/* Appends a boolean into the JSON array in the provided buffer. */
+static inline int
+rte_tel_json_add_array_bool(char *buf, const int len, const int used,
+		bool val)
+{
+	int ret, end = used - 1; /* strip off final delimiter */
+	if (used <= 2) /* assume empty, since minimum is '[]' */
+		return __json_snprintf(buf, len, "[%s]",
+				val ? "true" : "false");
+
+	ret = __json_snprintf(buf + end, len - end, ",%s]",
+			val ? "true" : "false");
+	return ret == 0 ? used : end + ret;
+}
+
 /*
  * Add a new element with raw JSON value to the JSON array stored in the
  * provided buffer.
@@ -193,6 +209,24 @@ rte_tel_json_add_obj_u64(char *buf, const int len, const int used,
 	return ret == 0 ? used : end + ret;
 }
 
+/**
+ * Add a new element with boolean value to the JSON object stored in the
+ * provided buffer.
+ */
+static inline int
+rte_tel_json_add_obj_bool(char *buf, const int len, const int used,
+		const char *name, bool val)
+{
+	int ret, end = used - 1;
+	if (used <= 2) /* assume empty, since minimum is '{}' */
+		return __json_snprintf(buf, len, "{\"%s\":%s}", name,
+				val ? "true" : "false");
+
+	ret = __json_snprintf(buf + end, len - end, ",\"%s\":%s}",
+			name, val ? "true" : "false");
+	return ret == 0 ? used : end + ret;
+}
+
 /**
  * Add a new element with int value to the JSON object stored in the
  * provided buffer.
diff --git a/lib/telemetry/version.map b/lib/telemetry/version.map
index 9794f9ea20..88f58d4d89 100644
--- a/lib/telemetry/version.map
+++ b/lib/telemetry/version.map
@@ -19,7 +19,17 @@ DPDK_23 {
 	local: *;
 };
 
+EXPERIMENTAL {
+	global:
+
+	# added in 22.11
+	rte_tel_data_add_array_bool;
+	rte_tel_data_add_dict_bool;
+};
+
 INTERNAL {
+	global:
+
 	rte_telemetry_legacy_register;
 	rte_telemetry_init;
 };
-- 
2.37.3