--- /dev/null
+/*
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/buffer-usage-internal.h>
+#include <common/macros.h>
+#include <common/error.h>
+#include <assert.h>
+#include <math.h>
+#include <float.h>
+#include <time.h>
+
+#define IS_USAGE_CONDITION(condition) ( \
+ lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || \
+ lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH \
+ )
+
+static
+double fixed_to_double(uint32_t val)
+{
+ return (double) val / (double) UINT32_MAX;
+}
+
+static
+uint64_t double_to_fixed(double val)
+{
+ return (val * (double) UINT32_MAX);
+}
+
+static
+bool is_usage_evaluation(const struct lttng_evaluation *evaluation)
+{
+ enum lttng_condition_type type = lttng_evaluation_get_type(evaluation);
+
+ return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW ||
+ type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH;
+}
+
+static
+void lttng_condition_buffer_usage_destroy(struct lttng_condition *condition)
+{
+ struct lttng_condition_buffer_usage *usage;
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+
+ free(usage->session_name);
+ free(usage->channel_name);
+ free(usage);
+}
+
+static
+bool lttng_condition_buffer_usage_validate(
+ const struct lttng_condition *condition)
+{
+ bool valid = false;
+ struct lttng_condition_buffer_usage *usage;
+
+ if (!condition) {
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ if (!usage->session_name) {
+ ERR("Invalid buffer condition: a target session name must be set.");
+ goto end;
+ }
+ if (!usage->channel_name) {
+ ERR("Invalid buffer condition: a target channel name must be set.");
+ goto end;
+ }
+ if (!usage->threshold_ratio.set && !usage->threshold_bytes.set) {
+ ERR("Invalid buffer condition: a threshold must be set.");
+ goto end;
+ }
+ if (!usage->domain.set) {
+ ERR("Invalid buffer usage condition: a domain must be set.");
+ goto end;
+ }
+
+ valid = true;
+end:
+ return valid;
+}
+
+static
+int lttng_condition_buffer_usage_serialize(
+ const struct lttng_condition *condition,
+ struct lttng_dynamic_buffer *buf,
+ int *fd_to_send)
+{
+ int ret;
+ struct lttng_condition_buffer_usage *usage;
+ size_t session_name_len, channel_name_len;
+ struct lttng_condition_buffer_usage_comm usage_comm;
+
+ if (!condition || !IS_USAGE_CONDITION(condition)) {
+ ret = -1;
+ goto end;
+ }
+
+ DBG("Serializing buffer usage condition");
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+
+ session_name_len = strlen(usage->session_name) + 1;
+ channel_name_len = strlen(usage->channel_name) + 1;
+ if (session_name_len > LTTNG_NAME_MAX ||
+ channel_name_len > LTTNG_NAME_MAX) {
+ ret = -1;
+ goto end;
+ }
+
+ usage_comm.threshold_set_in_bytes = !!usage->threshold_bytes.set;
+ usage_comm.session_name_len = session_name_len;
+ usage_comm.channel_name_len = channel_name_len;
+ usage_comm.domain_type = (int8_t) usage->domain.type;
+
+ if (usage->threshold_bytes.set) {
+ usage_comm.threshold = usage->threshold_bytes.value;
+ } else {
+ uint64_t val = double_to_fixed(
+ usage->threshold_ratio.value);
+
+ if (val > UINT32_MAX) {
+ /* overflow. */
+ ret = -1;
+ goto end;
+ }
+ usage_comm.threshold = val;
+ }
+
+ ret = lttng_dynamic_buffer_append(buf, &usage_comm,
+ sizeof(usage_comm));
+ if (ret) {
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buf, usage->session_name,
+ session_name_len);
+ if (ret) {
+ goto end;
+ }
+ ret = lttng_dynamic_buffer_append(buf, usage->channel_name,
+ channel_name_len);
+ if (ret) {
+ goto end;
+ }
+
+ if (fd_to_send) {
+ /* No fd to send */
+ *fd_to_send = -1;
+ }
+end:
+ return ret;
+}
+
+static
+bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a,
+ const struct lttng_condition *_b)
+{
+ bool is_equal = false;
+ struct lttng_condition_buffer_usage *a, *b;
+
+ a = container_of(_a, struct lttng_condition_buffer_usage, parent);
+ b = container_of(_b, struct lttng_condition_buffer_usage, parent);
+
+ if ((a->threshold_ratio.set && !b->threshold_ratio.set) ||
+ (a->threshold_bytes.set && !b->threshold_bytes.set)) {
+ goto end;
+ }
+
+ if (a->threshold_ratio.set && b->threshold_ratio.set) {
+ double a_value, b_value, diff;
+
+ a_value = a->threshold_ratio.value;
+ b_value = b->threshold_ratio.value;
+ diff = fabs(a_value - b_value);
+
+ if (diff > DBL_EPSILON) {
+ goto end;
+ }
+ } else if (a->threshold_bytes.set && b->threshold_bytes.set) {
+ uint64_t a_value, b_value;
+
+ a_value = a->threshold_bytes.value;
+ b_value = b->threshold_bytes.value;
+ if (a_value != b_value) {
+ goto end;
+ }
+ }
+
+ /* Condition is not valid if this is not true. */
+ assert(a->session_name);
+ assert(b->session_name);
+ if (strcmp(a->session_name, b->session_name)) {
+ goto end;
+ }
+
+ assert(a->channel_name);
+ assert(b->channel_name);
+ if (strcmp(a->channel_name, b->channel_name)) {
+ goto end;
+ }
+
+ assert(a->domain.set);
+ assert(b->domain.set);
+ if (a->domain.type != b->domain.type) {
+ goto end;
+ }
+ is_equal = true;
+end:
+ return is_equal;
+}
+
+static
+struct lttng_condition *lttng_condition_buffer_usage_create(
+ enum lttng_condition_type type)
+{
+ struct lttng_condition_buffer_usage *condition;
+
+ condition = zmalloc(sizeof(struct lttng_condition_buffer_usage));
+ if (!condition) {
+ return NULL;
+ }
+
+ lttng_condition_init(&condition->parent, type);
+ condition->parent.validate = lttng_condition_buffer_usage_validate;
+ condition->parent.serialize = lttng_condition_buffer_usage_serialize;
+ condition->parent.equal = lttng_condition_buffer_usage_is_equal;
+ condition->parent.destroy = lttng_condition_buffer_usage_destroy;
+ return &condition->parent;
+}
+
+struct lttng_condition *lttng_condition_buffer_usage_low_create(void)
+{
+ return lttng_condition_buffer_usage_create(
+ LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW);
+}
+
+struct lttng_condition *lttng_condition_buffer_usage_high_create(void)
+{
+ return lttng_condition_buffer_usage_create(
+ LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH);
+}
+
+static
+ssize_t init_condition_from_buffer(struct lttng_condition *condition,
+ const struct lttng_buffer_view *src_view)
+{
+ ssize_t ret, condition_size;
+ enum lttng_condition_status status;
+ enum lttng_domain_type domain_type;
+ const struct lttng_condition_buffer_usage_comm *condition_comm;
+ const char *session_name, *channel_name;
+ struct lttng_buffer_view names_view;
+
+ if (src_view->size < sizeof(*condition_comm)) {
+ ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header");
+ ret = -1;
+ goto end;
+ }
+
+ condition_comm = (const struct lttng_condition_buffer_usage_comm *) src_view->data;
+ names_view = lttng_buffer_view_from_view(src_view,
+ sizeof(*condition_comm), -1);
+
+ if (condition_comm->session_name_len > LTTNG_NAME_MAX ||
+ condition_comm->channel_name_len > LTTNG_NAME_MAX) {
+ ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME");
+ ret = -1;
+ goto end;
+ }
+
+ if (names_view.size <
+ (condition_comm->session_name_len +
+ condition_comm->channel_name_len)) {
+ ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names");
+ ret = -1;
+ goto end;
+ }
+
+ if (condition_comm->threshold_set_in_bytes) {
+ status = lttng_condition_buffer_usage_set_threshold(condition,
+ condition_comm->threshold);
+ } else {
+ status = lttng_condition_buffer_usage_set_threshold_ratio(
+ condition,
+ fixed_to_double(condition_comm->threshold));
+ }
+ if (status != LTTNG_CONDITION_STATUS_OK) {
+ ERR("Failed to initialize buffer usage condition threshold");
+ ret = -1;
+ goto end;
+ }
+
+ if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE ||
+ condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) {
+ /* Invalid domain value. */
+ ERR("Invalid domain type value (%i) found in condition buffer",
+ (int) condition_comm->domain_type);
+ ret = -1;
+ goto end;
+ }
+
+ domain_type = (enum lttng_domain_type) condition_comm->domain_type;
+ status = lttng_condition_buffer_usage_set_domain_type(condition,
+ domain_type);
+ if (status != LTTNG_CONDITION_STATUS_OK) {
+ ERR("Failed to set buffer usage condition domain");
+ ret = -1;
+ goto end;
+ }
+
+ session_name = names_view.data;
+ if (*(session_name + condition_comm->session_name_len - 1) != '\0') {
+ ERR("Malformed session name encountered in condition buffer");
+ ret = -1;
+ goto end;
+ }
+
+ channel_name = session_name + condition_comm->session_name_len;
+ if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') {
+ ERR("Malformed channel name encountered in condition buffer");
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_condition_buffer_usage_set_session_name(condition,
+ session_name);
+ if (status != LTTNG_CONDITION_STATUS_OK) {
+ ERR("Failed to set buffer usage session name");
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_condition_buffer_usage_set_channel_name(condition,
+ channel_name);
+ if (status != LTTNG_CONDITION_STATUS_OK) {
+ ERR("Failed to set buffer usage channel name");
+ ret = -1;
+ goto end;
+ }
+
+ if (!lttng_condition_validate(condition)) {
+ ret = -1;
+ goto end;
+ }
+
+ condition_size = sizeof(*condition_comm) +
+ (ssize_t) condition_comm->session_name_len +
+ (ssize_t) condition_comm->channel_name_len;
+ ret = condition_size;
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_condition_buffer_usage_low_create_from_buffer(
+ const struct lttng_buffer_view *view,
+ struct lttng_condition **_condition)
+{
+ ssize_t ret;
+ struct lttng_condition *condition =
+ lttng_condition_buffer_usage_low_create();
+
+ if (!_condition || !condition) {
+ ret = -1;
+ goto error;
+ }
+
+ ret = init_condition_from_buffer(condition, view);
+ if (ret < 0) {
+ goto error;
+ }
+
+ *_condition = condition;
+ return ret;
+error:
+ lttng_condition_destroy(condition);
+ return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_condition_buffer_usage_high_create_from_buffer(
+ const struct lttng_buffer_view *view,
+ struct lttng_condition **_condition)
+{
+ ssize_t ret;
+ struct lttng_condition *condition =
+ lttng_condition_buffer_usage_high_create();
+
+ if (!_condition || !condition) {
+ ret = -1;
+ goto error;
+ }
+
+ ret = init_condition_from_buffer(condition, view);
+ if (ret < 0) {
+ goto error;
+ }
+
+ *_condition = condition;
+ return ret;
+error:
+ lttng_condition_destroy(condition);
+ return ret;
+}
+
+static
+struct lttng_evaluation *create_evaluation_from_buffer(
+ enum lttng_condition_type type,
+ const struct lttng_buffer_view *view)
+{
+ const struct lttng_evaluation_buffer_usage_comm *comm =
+ (const struct lttng_evaluation_buffer_usage_comm *) view->data;
+ struct lttng_evaluation *evaluation = NULL;
+
+ if (view->size < sizeof(*comm)) {
+ goto end;
+ }
+
+ evaluation = lttng_evaluation_buffer_usage_create(type,
+ comm->buffer_use, comm->buffer_capacity);
+end:
+ return evaluation;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_evaluation_buffer_usage_low_create_from_buffer(
+ const struct lttng_buffer_view *view,
+ struct lttng_evaluation **_evaluation)
+{
+ ssize_t ret;
+ struct lttng_evaluation *evaluation = NULL;
+
+ if (!_evaluation) {
+ ret = -1;
+ goto error;
+ }
+
+ evaluation = create_evaluation_from_buffer(
+ LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view);
+ if (!evaluation) {
+ ret = -1;
+ goto error;
+ }
+
+ *_evaluation = evaluation;
+ ret = sizeof(struct lttng_evaluation_buffer_usage_comm);
+ return ret;
+error:
+ lttng_evaluation_destroy(evaluation);
+ return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_evaluation_buffer_usage_high_create_from_buffer(
+ const struct lttng_buffer_view *view,
+ struct lttng_evaluation **_evaluation)
+{
+ ssize_t ret;
+ struct lttng_evaluation *evaluation = NULL;
+
+ if (!_evaluation) {
+ ret = -1;
+ goto error;
+ }
+
+ evaluation = create_evaluation_from_buffer(
+ LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, view);
+ if (!evaluation) {
+ ret = -1;
+ goto error;
+ }
+
+ *_evaluation = evaluation;
+ ret = sizeof(struct lttng_evaluation_buffer_usage_comm);
+ return ret;
+error:
+ lttng_evaluation_destroy(evaluation);
+ return ret;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_get_threshold_ratio(
+ const struct lttng_condition *condition,
+ double *threshold_ratio)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) ||
+ !threshold_ratio) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ if (!usage->threshold_ratio.set) {
+ status = LTTNG_CONDITION_STATUS_UNSET;
+ goto end;
+ }
+ *threshold_ratio = usage->threshold_ratio.value;
+end:
+ return status;
+}
+
+/* threshold_ratio expressed as [0.0, 1.0]. */
+enum lttng_condition_status
+lttng_condition_buffer_usage_set_threshold_ratio(
+ struct lttng_condition *condition, double threshold_ratio)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) ||
+ threshold_ratio < 0.0 ||
+ threshold_ratio > 1.0) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ usage->threshold_ratio.set = true;
+ usage->threshold_bytes.set = false;
+ usage->threshold_ratio.value = threshold_ratio;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_get_threshold(
+ const struct lttng_condition *condition,
+ uint64_t *threshold_bytes)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ if (!usage->threshold_bytes.set) {
+ status = LTTNG_CONDITION_STATUS_UNSET;
+ goto end;
+ }
+ *threshold_bytes = usage->threshold_bytes.value;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_set_threshold(
+ struct lttng_condition *condition, uint64_t threshold_bytes)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition)) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ usage->threshold_ratio.set = false;
+ usage->threshold_bytes.set = true;
+ usage->threshold_bytes.value = threshold_bytes;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_get_session_name(
+ const struct lttng_condition *condition,
+ const char **session_name)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ if (!usage->session_name) {
+ status = LTTNG_CONDITION_STATUS_UNSET;
+ goto end;
+ }
+ *session_name = usage->session_name;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_set_session_name(
+ struct lttng_condition *condition, const char *session_name)
+{
+ char *session_name_copy;
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) || !session_name ||
+ strlen(session_name) == 0) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ session_name_copy = strdup(session_name);
+ if (!session_name_copy) {
+ status = LTTNG_CONDITION_STATUS_ERROR;
+ goto end;
+ }
+
+ if (usage->session_name) {
+ free(usage->session_name);
+ }
+ usage->session_name = session_name_copy;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_get_channel_name(
+ const struct lttng_condition *condition,
+ const char **channel_name)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ if (!usage->channel_name) {
+ status = LTTNG_CONDITION_STATUS_UNSET;
+ goto end;
+ }
+ *channel_name = usage->channel_name;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_set_channel_name(
+ struct lttng_condition *condition, const char *channel_name)
+{
+ char *channel_name_copy;
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name ||
+ strlen(channel_name) == 0) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ channel_name_copy = strdup(channel_name);
+ if (!channel_name_copy) {
+ status = LTTNG_CONDITION_STATUS_ERROR;
+ goto end;
+ }
+
+ if (usage->channel_name) {
+ free(usage->channel_name);
+ }
+ usage->channel_name = channel_name_copy;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_get_domain_type(
+ const struct lttng_condition *condition,
+ enum lttng_domain_type *type)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) || !type) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ if (!usage->domain.set) {
+ status = LTTNG_CONDITION_STATUS_UNSET;
+ goto end;
+ }
+ *type = usage->domain.type;
+end:
+ return status;
+}
+
+enum lttng_condition_status
+lttng_condition_buffer_usage_set_domain_type(
+ struct lttng_condition *condition, enum lttng_domain_type type)
+{
+ struct lttng_condition_buffer_usage *usage;
+ enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
+
+ if (!condition || !IS_USAGE_CONDITION(condition) ||
+ type == LTTNG_DOMAIN_NONE) {
+ status = LTTNG_CONDITION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(condition, struct lttng_condition_buffer_usage,
+ parent);
+ usage->domain.set = true;
+ usage->domain.type = type;
+end:
+ return status;
+}
+
+static
+int lttng_evaluation_buffer_usage_serialize(
+ const struct lttng_evaluation *evaluation,
+ struct lttng_dynamic_buffer *buf)
+{
+ struct lttng_evaluation_buffer_usage *usage;
+ struct lttng_evaluation_buffer_usage_comm comm;
+
+ usage = container_of(evaluation, struct lttng_evaluation_buffer_usage,
+ parent);
+ comm.buffer_use = usage->buffer_use;
+ comm.buffer_capacity = usage->buffer_capacity;
+
+ return lttng_dynamic_buffer_append(buf, &comm, sizeof(comm));
+}
+
+static
+void lttng_evaluation_buffer_usage_destroy(
+ struct lttng_evaluation *evaluation)
+{
+ struct lttng_evaluation_buffer_usage *usage;
+
+ usage = container_of(evaluation, struct lttng_evaluation_buffer_usage,
+ parent);
+ free(usage);
+}
+
+LTTNG_HIDDEN
+struct lttng_evaluation *lttng_evaluation_buffer_usage_create(
+ enum lttng_condition_type type, uint64_t use, uint64_t capacity)
+{
+ struct lttng_evaluation_buffer_usage *usage;
+
+ usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage));
+ if (!usage) {
+ goto end;
+ }
+
+ usage->parent.type = type;
+ usage->buffer_use = use;
+ usage->buffer_capacity = capacity;
+ usage->parent.serialize = lttng_evaluation_buffer_usage_serialize;
+ usage->parent.destroy = lttng_evaluation_buffer_usage_destroy;
+end:
+ return &usage->parent;
+}
+
+/*
+ * Get the sampled buffer usage which caused the associated condition to
+ * evaluate to "true".
+ */
+enum lttng_evaluation_status
+lttng_evaluation_buffer_usage_get_usage_ratio(
+ const struct lttng_evaluation *evaluation, double *usage_ratio)
+{
+ struct lttng_evaluation_buffer_usage *usage;
+ enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK;
+
+ if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) {
+ status = LTTNG_EVALUATION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(evaluation, struct lttng_evaluation_buffer_usage,
+ parent);
+ *usage_ratio = (double) usage->buffer_use /
+ (double) usage->buffer_capacity;
+end:
+ return status;
+}
+
+enum lttng_evaluation_status
+lttng_evaluation_buffer_usage_get_usage(
+ const struct lttng_evaluation *evaluation,
+ uint64_t *usage_bytes)
+{
+ struct lttng_evaluation_buffer_usage *usage;
+ enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK;
+
+ if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) {
+ status = LTTNG_EVALUATION_STATUS_INVALID;
+ goto end;
+ }
+
+ usage = container_of(evaluation, struct lttng_evaluation_buffer_usage,
+ parent);
+ *usage_bytes = usage->buffer_use;
+end:
+ return status;
+}
projects / lttng-tools.git / blobdiff