--- /dev/null
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_EVENT_RULE_TRACEPOINT_H
+#define LTTNG_EVENT_RULE_TRACEPOINT_H
+
+#include <lttng/domain.h>
+#include <lttng/event-rule/event-rule.h>
+#include <lttng/event.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Create a newly allocated tracepoint event rule.
+ *
+ * Returns a new event rule on success, NULL on failure. This event rule must be
+ * destroyed using lttng_event_rule_destroy().
+ */
+extern struct lttng_event_rule *lttng_event_rule_tracepoint_create(
+ enum lttng_domain_type domain);
+
+/*
+ * Set the pattern of a tracepoint event rule.
+ *
+ * Pattern can contain wildcard '*'. See man lttng-enable-event.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern(
+ struct lttng_event_rule *rule, const char *pattern);
+
+/*
+ * Get the pattern of a tracepoint event rule.
+ *
+ * The caller does not assume the ownership of the returned pattern. The
+ * pattern shall only only be used for the duration of the event rule's
+ * lifetime, or before a different pattern is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's pattern
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
+ * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a pattern
+ * was not set prior to this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern(
+ const struct lttng_event_rule *rule, const char **pattern);
+
+/*
+ * Get the domain type of a tracepoint event rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the domain type output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a pattern was not set prior to
+ * this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type(
+ const struct lttng_event_rule *rule,
+ enum lttng_domain_type *type);
+
+/*
+ * Set the filter expression of a tracepoint event rule.
+ *
+ * The expression is copied internally.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter(
+ struct lttng_event_rule *rule, const char *expression);
+
+/*
+ * Get the filter expression of a tracepoint event rule.
+ *
+ * The caller does not assume the ownership of the returned filter expression.
+ * The filter expression shall only only be used for the duration of the event
+ * rule's lifetime, or before a different filter expression is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's filter
+ * expression on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
+ * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a filter expression
+ * was not set prior to this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter(
+ const struct lttng_event_rule *rule, const char **expression);
+
+/*
+ * Set the single log level of a tracepoint event rule.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level(
+ struct lttng_event_rule *rule, int level);
+
+/*
+ * Set the log level range lower bound of a tracepoint event rule.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_set_log_level_range_lower_bound(
+ struct lttng_event_rule *rule, int level);
+
+/*
+ * Set the log level to all of a tracepoint event rule.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_set_log_level_all(struct lttng_event_rule *rule);
+
+/*
+ * Get the log level type of a tracepoint event rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the log level type output
+ * parameter on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter
+ * is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a log level was not set prior
+ * to this call.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_get_log_level_type(
+ const struct lttng_event_rule *rule,
+ enum lttng_loglevel_type *type);
+
+/*
+ * Get the log level of a tracepoint event rule.
+ *
+ * For range log level , the lower bound log level is returned.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the log level output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a log level was not set prior to
+ * this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level(
+ const struct lttng_event_rule *rule, int *level);
+
+/*
+ * Add an exclusion to the set of exclusion of an event rule.
+ *
+ * The passed exclusion will be copied to the event_rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK on success,
+ * LTTNG_EVENT_RULE_STATUS_INVALID if invalid parameters are passed, or
+ * LTTNG_EVENT_RULE_STATUS_UNSUPPORTED if this property is not supported by the
+ * domain.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion(
+ struct lttng_event_rule *rule,
+ const char *exclusion);
+
+/*
+ * Get the exclusions property count of an event rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the count output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_get_exclusions_count(
+ const struct lttng_event_rule *rule, unsigned int *count);
+
+/*
+ * Get the event rule exclusion at the given index.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the exclusion output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_get_exclusion_at_index(
+ const struct lttng_event_rule *rule,
+ unsigned int index,
+ const char **exclusion);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LTTNG_EVENT_RULE_TRACEPOINT_H */
--- /dev/null
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <assert.h>
+#include <common/error.h>
+#include <common/macros.h>
+#include <common/payload.h>
+#include <common/payload-view.h>
+#include <common/runas.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/tracepoint-internal.h>
+
+#define IS_TRACEPOINT_EVENT_RULE(rule) \
+ (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_TRACEPOINT)
+
+static void lttng_event_rule_tracepoint_destroy(struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+
+ if (rule == NULL) {
+ return;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+
+ lttng_dynamic_pointer_array_reset(&tracepoint->exclusions);
+ free(tracepoint->pattern);
+ free(tracepoint->filter_expression);
+ free(tracepoint->internal_filter.filter);
+ free(tracepoint->internal_filter.bytecode);
+ free(tracepoint);
+}
+
+static bool lttng_event_rule_tracepoint_validate(
+ const struct lttng_event_rule *rule)
+{
+ bool valid = false;
+ struct lttng_event_rule_tracepoint *tracepoint;
+
+ if (!rule) {
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+
+ /* Required field. */
+ if (!tracepoint->pattern) {
+ ERR("Invalid tracepoint event rule: a pattern must be set.");
+ goto end;
+ }
+
+ /* Required field. */
+ if (tracepoint->domain == LTTNG_DOMAIN_NONE) {
+ ERR("Invalid tracepoint event rule: a domain must be set.");
+ goto end;
+ }
+
+ valid = true;
+end:
+ return valid;
+}
+
+static int lttng_event_rule_tracepoint_serialize(
+ const struct lttng_event_rule *rule,
+ struct lttng_payload *payload)
+{
+ int ret, i;
+ size_t pattern_len, filter_expression_len, exclusions_len;
+ struct lttng_event_rule_tracepoint *tracepoint;
+ struct lttng_event_rule_tracepoint_comm tracepoint_comm;
+ enum lttng_event_rule_status status;
+ unsigned int exclusion_count;
+ size_t exclusions_appended_len = 0;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+ ret = -1;
+ goto end;
+ }
+
+ DBG("Serializing tracepoint event rule.");
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+
+ status = lttng_event_rule_tracepoint_get_exclusions_count(rule, &exclusion_count);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ pattern_len = strlen(tracepoint->pattern) + 1;
+
+ if (tracepoint->filter_expression != NULL) {
+ filter_expression_len =
+ strlen(tracepoint->filter_expression) + 1;
+ } else {
+ filter_expression_len = 0;
+ }
+
+ exclusions_len = 0;
+ for (i = 0; i < exclusion_count; i++) {
+ const char *exclusion;
+
+ status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+ rule, i, &exclusion);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ /* Length field. */
+ exclusions_len += sizeof(uint32_t);
+ /* Payload (null terminated). */
+ exclusions_len += strlen(exclusion) + 1;
+ }
+
+ tracepoint_comm.domain_type = (int8_t) tracepoint->domain;
+ tracepoint_comm.loglevel_type = (int8_t) tracepoint->loglevel.type;
+ tracepoint_comm.loglevel_value = tracepoint->loglevel.value;
+ tracepoint_comm.pattern_len = pattern_len;
+ tracepoint_comm.filter_expression_len = filter_expression_len;
+ tracepoint_comm.exclusions_count = exclusion_count;
+ tracepoint_comm.exclusions_len = exclusions_len;
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &tracepoint_comm,
+ sizeof(tracepoint_comm));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, tracepoint->pattern, pattern_len);
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->filter_expression,
+ filter_expression_len);
+ if (ret) {
+ goto end;
+ }
+
+ for (i = 0; i < exclusion_count; i++) {
+ size_t len;
+ const char *exclusion;
+
+ status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+ rule, i, &exclusion);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ len = strlen(exclusion) + 1;
+ /* Append exclusion length, includes the null terminator. */
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &len, sizeof(uint32_t));
+ if (ret) {
+ goto end;
+ }
+
+ exclusions_appended_len += sizeof(uint32_t);
+
+ /* Include the '\0' in the payload. */
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, exclusion, len);
+ if (ret) {
+ goto end;
+ }
+
+ exclusions_appended_len += len;
+ }
+
+ assert(exclusions_len == exclusions_appended_len);
+
+end:
+ return ret;
+}
+
+static bool lttng_event_rule_tracepoint_is_equal(
+ const struct lttng_event_rule *_a,
+ const struct lttng_event_rule *_b)
+{
+ int i;
+ bool is_equal = false;
+ struct lttng_event_rule_tracepoint *a, *b;
+ unsigned int count_a, count_b;
+ enum lttng_event_rule_status status;
+
+ a = container_of(_a, struct lttng_event_rule_tracepoint, parent);
+ b = container_of(_b, struct lttng_event_rule_tracepoint, parent);
+
+ status = lttng_event_rule_tracepoint_get_exclusions_count(_a, &count_a);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ status = lttng_event_rule_tracepoint_get_exclusions_count(_b, &count_b);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ /* Quick checks. */
+ if (a->domain != b->domain) {
+ goto end;
+ }
+
+ if (count_a != count_b) {
+ goto end;
+ }
+
+ if (!!a->filter_expression != !!b->filter_expression) {
+ goto end;
+ }
+
+ /* Long check. */
+ assert(a->pattern);
+ assert(b->pattern);
+ if (strcmp(a->pattern, b->pattern)) {
+ goto end;
+ }
+
+ if (a->filter_expression && b->filter_expression) {
+ if (strcmp(a->filter_expression, b->filter_expression)) {
+ goto end;
+ }
+ } else if (!!a->filter_expression != !!b->filter_expression) {
+ /* One is set; not the other. */
+ goto end;
+ }
+
+ if (a->loglevel.type != b->loglevel.type) {
+ goto end;
+ }
+
+ if (a->loglevel.value != b->loglevel.value) {
+ goto end;
+ }
+
+ for (i = 0; i < count_a; i++) {
+ const char *exclusion_a, *exclusion_b;
+
+ status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+ _a, i, &exclusion_a);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+ _b, i, &exclusion_b);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ if (strcmp(exclusion_a, exclusion_b)) {
+ goto end;
+ }
+ }
+
+ is_equal = true;
+end:
+ return is_equal;
+}
+
+/*
+ * On success ret is 0;
+ *
+ * On error ret is negative.
+ *
+ * An event with NO loglevel and the name is * will return NULL.
+ */
+static int generate_agent_filter(
+ const struct lttng_event_rule *rule, char **_agent_filter)
+{
+ int err;
+ int ret = 0;
+ char *agent_filter = NULL;
+ const char *pattern;
+ const char *filter;
+ enum lttng_loglevel_type loglevel_type;
+ enum lttng_event_rule_status status;
+
+ assert(rule);
+ assert(_agent_filter);
+
+ status = lttng_event_rule_tracepoint_get_pattern(rule, &pattern);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_event_rule_tracepoint_get_filter(rule, &filter);
+ if (status == LTTNG_EVENT_RULE_STATUS_UNSET) {
+ filter = NULL;
+ } else if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_event_rule_tracepoint_get_log_level_type(
+ rule, &loglevel_type);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Don't add filter for the '*' event. */
+ if (strcmp(pattern, "*") != 0) {
+ if (filter) {
+ err = asprintf(&agent_filter,
+ "(%s) && (logger_name == \"%s\")",
+ filter, pattern);
+ } else {
+ err = asprintf(&agent_filter, "logger_name == \"%s\"",
+ pattern);
+ }
+
+ if (err < 0) {
+ PERROR("Failed to format agent filter string");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ if (loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
+ const char *op;
+ int loglevel_value;
+
+ status = lttng_event_rule_tracepoint_get_log_level(
+ rule, &loglevel_value);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ if (loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
+ op = ">=";
+ } else {
+ op = "==";
+ }
+
+ if (filter || agent_filter) {
+ char *new_filter;
+
+ err = asprintf(&new_filter,
+ "(%s) && (int_loglevel %s %d)",
+ agent_filter ? agent_filter : filter,
+ op, loglevel_value);
+ if (agent_filter) {
+ free(agent_filter);
+ }
+ agent_filter = new_filter;
+ } else {
+ err = asprintf(&agent_filter, "int_loglevel %s %d", op,
+ loglevel_value);
+ }
+
+ if (err < 0) {
+ PERROR("Failed to format agent filter string");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ *_agent_filter = agent_filter;
+ agent_filter = NULL;
+
+end:
+ free(agent_filter);
+ return ret;
+}
+
+static enum lttng_error_code
+lttng_event_rule_tracepoint_generate_filter_bytecode(
+ struct lttng_event_rule *rule, uid_t uid, gid_t gid)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_domain_type domain_type;
+ enum lttng_event_rule_status status;
+ const char *filter;
+ struct lttng_filter_bytecode *bytecode = NULL;
+
+ assert(rule);
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+
+ status = lttng_event_rule_tracepoint_get_filter(rule, &filter);
+ if (status == LTTNG_EVENT_RULE_STATUS_UNSET) {
+ filter = NULL;
+ } else if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret_code = LTTNG_ERR_FILTER_INVAL;
+ goto end;
+ }
+
+ if (filter && filter[0] == '\0') {
+ ret_code = LTTNG_ERR_FILTER_INVAL;
+ goto error;
+ }
+
+ status = lttng_event_rule_tracepoint_get_domain_type(
+ rule, &domain_type);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret_code = LTTNG_ERR_UNK;
+ goto error;
+ }
+
+ switch (domain_type) {
+ case LTTNG_DOMAIN_LOG4J:
+ case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_PYTHON:
+ {
+ char *agent_filter;
+
+ ret = generate_agent_filter(rule, &agent_filter);
+ if (ret) {
+ ret_code = LTTNG_ERR_FILTER_INVAL;
+ goto error;
+ }
+
+ tracepoint->internal_filter.filter = agent_filter;
+ break;
+ }
+ default:
+ {
+ if (filter) {
+ tracepoint->internal_filter.filter = strdup(filter);
+ if (tracepoint->internal_filter.filter == NULL) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ } else {
+ tracepoint->internal_filter.filter = NULL;
+ }
+ break;
+ }
+ }
+
+ if (tracepoint->internal_filter.filter == NULL) {
+ ret_code = LTTNG_OK;
+ goto end;
+ }
+
+ ret = run_as_generate_filter_bytecode(
+ tracepoint->internal_filter.filter, uid, gid,
+ &bytecode);
+ if (ret) {
+ ret_code = LTTNG_ERR_FILTER_INVAL;
+ goto end;
+ }
+
+ tracepoint->internal_filter.bytecode = bytecode;
+ bytecode = NULL;
+ ret_code = LTTNG_OK;
+
+error:
+end:
+ free(bytecode);
+ return ret_code;
+}
+
+static const char *lttng_event_rule_tracepoint_get_internal_filter(
+ const struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+
+ assert(rule);
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ return tracepoint->internal_filter.filter;
+}
+
+static const struct lttng_filter_bytecode *
+lttng_event_rule_tracepoint_get_internal_filter_bytecode(
+ const struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+
+ assert(rule);
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ return tracepoint->internal_filter.bytecode;
+}
+
+static struct lttng_event_exclusion *
+lttng_event_rule_tracepoint_generate_exclusions(
+ const struct lttng_event_rule *rule)
+{
+ enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE;
+ enum lttng_event_rule_status status;
+ struct lttng_event_exclusion *local_exclusions = NULL;
+ struct lttng_event_exclusion *ret_exclusions = NULL;
+ unsigned int nb_exclusions = 0;
+ unsigned int i;
+
+ status = lttng_event_rule_tracepoint_get_domain_type(rule, &domain_type);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ switch (domain_type) {
+ case LTTNG_DOMAIN_KERNEL:
+ case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_LOG4J:
+ case LTTNG_DOMAIN_PYTHON:
+ /* Not supported. */
+ ret_exclusions = NULL;
+ goto end;
+ case LTTNG_DOMAIN_UST:
+ /* Exclusions supported. */
+ break;
+ default:
+ abort();
+ }
+
+ status = lttng_event_rule_tracepoint_get_exclusions_count(
+ rule, &nb_exclusions);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ if (nb_exclusions == 0) {
+ /* Nothing to do. */
+ ret_exclusions = NULL;
+ goto end;
+ }
+
+ local_exclusions = zmalloc(sizeof(struct lttng_event_exclusion) +
+ (LTTNG_SYMBOL_NAME_LEN * nb_exclusions));
+ if (!local_exclusions) {
+ PERROR("Failed to allocate exclusions buffer");
+ ret_exclusions = NULL;
+ goto end;
+ }
+
+ local_exclusions->count = nb_exclusions;
+ for (i = 0; i < nb_exclusions; i++) {
+ /* Truncation is already checked at the setter level. */
+ const char *tmp;
+
+ status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+ rule, i, &tmp);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ strncpy(local_exclusions->names[i], tmp, LTTNG_SYMBOL_NAME_LEN);
+ local_exclusions->names[i][LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+ }
+
+ /* Pass ownership. */
+ ret_exclusions = local_exclusions;
+ local_exclusions = NULL;
+end:
+ free(local_exclusions);
+ return ret_exclusions;
+}
+
+static void destroy_lttng_exclusions_element(void *ptr)
+{
+ free(ptr);
+}
+
+struct lttng_event_rule *lttng_event_rule_tracepoint_create(
+ enum lttng_domain_type domain_type)
+{
+ struct lttng_event_rule *rule = NULL;
+ struct lttng_event_rule_tracepoint *tp_rule;
+
+ if (domain_type == LTTNG_DOMAIN_NONE) {
+ goto end;
+ }
+
+ tp_rule = zmalloc(sizeof(struct lttng_event_rule_tracepoint));
+ if (!tp_rule) {
+ goto end;
+ }
+
+ rule = &tp_rule->parent;
+ lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_TRACEPOINT);
+ tp_rule->parent.validate = lttng_event_rule_tracepoint_validate;
+ tp_rule->parent.serialize = lttng_event_rule_tracepoint_serialize;
+ tp_rule->parent.equal = lttng_event_rule_tracepoint_is_equal;
+ tp_rule->parent.destroy = lttng_event_rule_tracepoint_destroy;
+ tp_rule->parent.generate_filter_bytecode =
+ lttng_event_rule_tracepoint_generate_filter_bytecode;
+ tp_rule->parent.get_filter =
+ lttng_event_rule_tracepoint_get_internal_filter;
+ tp_rule->parent.get_filter_bytecode =
+ lttng_event_rule_tracepoint_get_internal_filter_bytecode;
+ tp_rule->parent.generate_exclusions =
+ lttng_event_rule_tracepoint_generate_exclusions;
+
+ tp_rule->domain = domain_type;
+ tp_rule->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL;
+
+ lttng_dynamic_pointer_array_init(&tp_rule->exclusions,
+ destroy_lttng_exclusions_element);
+end:
+ return rule;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_event_rule_tracepoint_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_event_rule **_event_rule)
+{
+ ssize_t ret, offset = 0;
+ int i;
+ enum lttng_event_rule_status status;
+ enum lttng_domain_type domain_type;
+ enum lttng_loglevel_type loglevel_type;
+ const struct lttng_event_rule_tracepoint_comm *tracepoint_comm;
+ const char *pattern;
+ const char *filter_expression = NULL;
+ const char **exclusions = NULL;
+ const uint32_t *exclusion_len;
+ const char *exclusion;
+ struct lttng_buffer_view current_buffer_view;
+ struct lttng_event_rule *rule = NULL;
+
+ if (!_event_rule) {
+ ret = -1;
+ goto end;
+ }
+
+ if (view->buffer.size < sizeof(*tracepoint_comm)) {
+ ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header.");
+ ret = -1;
+ goto end;
+ }
+
+ current_buffer_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, sizeof(*tracepoint_comm));
+ tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data;
+
+ if (!tracepoint_comm) {
+ ret = -1;
+ goto end;
+ }
+
+ if (tracepoint_comm->domain_type <= LTTNG_DOMAIN_NONE ||
+ tracepoint_comm->domain_type > LTTNG_DOMAIN_PYTHON) {
+ /* Invalid domain value. */
+ ERR("Invalid domain type value (%i) found in tracepoint_comm buffer.",
+ (int) tracepoint_comm->domain_type);
+ ret = -1;
+ goto end;
+ }
+
+ domain_type = (enum lttng_domain_type) tracepoint_comm->domain_type;
+ rule = lttng_event_rule_tracepoint_create(domain_type);
+ if (!rule) {
+ ERR("Failed to create event rule tracepoint.");
+ ret = -1;
+ goto end;
+ }
+
+ loglevel_type = (enum lttng_loglevel_type)
+ tracepoint_comm->loglevel_type;
+ switch (loglevel_type) {
+ case LTTNG_EVENT_LOGLEVEL_ALL:
+ status = lttng_event_rule_tracepoint_set_log_level_all(rule);
+ break;
+ case LTTNG_EVENT_LOGLEVEL_RANGE:
+ status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound(rule,
+ (enum lttng_loglevel_type) tracepoint_comm
+ ->loglevel_value);
+ break;
+ case LTTNG_EVENT_LOGLEVEL_SINGLE:
+ status = lttng_event_rule_tracepoint_set_log_level(rule,
+ (enum lttng_loglevel_type) tracepoint_comm
+ ->loglevel_value);
+ break;
+ default:
+ ERR("Failed to set event rule tracepoint loglevel: unknown loglevel type.");
+ ret = -1;
+ goto end;
+ }
+
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set event rule tracepoint loglevel.");
+ }
+
+ /* Skip to payload. */
+ offset += current_buffer_view.size;
+
+ /* Map the pattern. */
+ current_buffer_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, tracepoint_comm->pattern_len);
+ pattern = current_buffer_view.data;
+ if (!pattern) {
+ ret = -1;
+ goto end;
+ }
+
+ if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern,
+ tracepoint_comm->pattern_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Skip after the pattern. */
+ offset += tracepoint_comm->pattern_len;
+
+ if (!tracepoint_comm->filter_expression_len) {
+ goto skip_filter_expression;
+ }
+
+ /* Map the filter_expression. */
+ current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset,
+ tracepoint_comm->filter_expression_len);
+ filter_expression = current_buffer_view.data;
+ if (!filter_expression) {
+ ret = -1;
+ goto end;
+ }
+
+ if (!lttng_buffer_view_contains_string(¤t_buffer_view,
+ filter_expression,
+ tracepoint_comm->filter_expression_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Skip after the pattern. */
+ offset += tracepoint_comm->filter_expression_len;
+
+skip_filter_expression:
+ for (i = 0; i < tracepoint_comm->exclusions_count; i++) {
+ current_buffer_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, sizeof(*exclusion_len));
+ exclusion_len = (typeof(exclusion_len)) current_buffer_view.data;
+ if (!exclusion_len) {
+ ret = -1;
+ goto end;
+ }
+
+ offset += sizeof(*exclusion_len);
+ current_buffer_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, *exclusion_len);
+ exclusion = current_buffer_view.data;
+ if (!lttng_buffer_view_contains_string(¤t_buffer_view,
+ exclusion, *exclusion_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_event_rule_tracepoint_add_exclusion(rule, exclusion);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to add event rule tracepoint exclusion \"%s\".",
+ exclusion);
+ ret = -1;
+ goto end;
+ }
+
+ /* Skip to next exclusion. */
+ offset += *exclusion_len;
+ }
+
+ status = lttng_event_rule_tracepoint_set_pattern(rule, pattern);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set event rule tracepoint pattern.");
+ ret = -1;
+ goto end;
+ }
+
+ if (filter_expression) {
+ status = lttng_event_rule_tracepoint_set_filter(
+ rule, filter_expression);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set event rule tracepoint pattern.");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ *_event_rule = rule;
+ rule = NULL;
+ ret = offset;
+end:
+ free(exclusions);
+ lttng_event_rule_destroy(rule);
+ return ret;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern(
+ struct lttng_event_rule *rule, const char *pattern)
+{
+ char *pattern_copy = NULL;
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern ||
+ strlen(pattern) == 0) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ pattern_copy = strdup(pattern);
+ if (!pattern_copy) {
+ status = LTTNG_EVENT_RULE_STATUS_ERROR;
+ goto end;
+ }
+
+ free(tracepoint->pattern);
+
+ tracepoint->pattern = pattern_copy;
+ pattern_copy = NULL;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern(
+ const struct lttng_event_rule *rule, const char **pattern)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ if (!tracepoint->pattern) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+ *pattern = tracepoint->pattern;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type(
+ const struct lttng_event_rule *rule,
+ enum lttng_domain_type *type)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ *type = tracepoint->domain;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter(
+ struct lttng_event_rule *rule, const char *expression)
+{
+ char *expression_copy = NULL;
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression ||
+ strlen(expression) == 0) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ expression_copy = strdup(expression);
+ if (!expression_copy) {
+ PERROR("Failed to copy filter expression");
+ status = LTTNG_EVENT_RULE_STATUS_ERROR;
+ goto end;
+ }
+
+ if (tracepoint->filter_expression) {
+ free(tracepoint->filter_expression);
+ }
+
+ tracepoint->filter_expression = expression_copy;
+ expression_copy = NULL;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter(
+ const struct lttng_event_rule *rule, const char **expression)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ if (!tracepoint->filter_expression) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+ *expression = tracepoint->filter_expression;
+end:
+ return status;
+}
+
+static bool log_level_value_valid(
+ int level, enum lttng_domain_type domain)
+{
+ bool valid = false;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_KERNEL:
+ case LTTNG_DOMAIN_UST:
+ if (level < LTTNG_LOGLEVEL_EMERG) {
+ /* Invalid. */
+ goto end;
+ }
+ if (level > LTTNG_LOGLEVEL_DEBUG) {
+ /* Invalid. */
+ goto end;
+ }
+
+ valid = true;
+ break;
+ case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_LOG4J:
+ case LTTNG_DOMAIN_PYTHON:
+ /*
+ * For both JUL and LOG4J custom log level are possible and can
+ * spawn the entire int32 range.
+ * For python, custom log level are possible, it is not clear if
+ * negative value are accepted (NOTSET == 0) but the source code
+ * validate against the int type implying that negative values
+ * are accepted.
+ */
+ valid = true;
+ goto end;
+
+ case LTTNG_DOMAIN_NONE:
+ default:
+ abort();
+ }
+
+end:
+ return valid;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level(
+ struct lttng_event_rule *rule, int level)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+
+ if (!log_level_value_valid(level, tracepoint->domain)) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint->loglevel.value = level;
+ tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_SINGLE;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status
+lttng_event_rule_tracepoint_set_log_level_range_lower_bound(
+ struct lttng_event_rule *rule, int level)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+
+ if (!log_level_value_valid(level, tracepoint->domain)) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint->loglevel.value = level;
+ tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_RANGE;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_all(
+ struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_type(
+ const struct lttng_event_rule *rule,
+ enum lttng_loglevel_type *type)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ *type = tracepoint->loglevel.type;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level(
+ const struct lttng_event_rule *rule, int *level)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !level) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ if (tracepoint->loglevel.type == LTTNG_EVENT_LOGLEVEL_ALL) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+ *level = tracepoint->loglevel.value;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion(
+ struct lttng_event_rule *rule,
+ const char *exclusion)
+{
+ int ret;
+ char *exclusion_copy = NULL;
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+ enum lttng_domain_type domain_type;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) ||
+ !exclusion) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+
+ status = lttng_event_rule_tracepoint_get_domain_type(
+ rule, &domain_type);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ goto end;
+ }
+
+ switch (domain_type) {
+ case LTTNG_DOMAIN_KERNEL:
+ case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_LOG4J:
+ case LTTNG_DOMAIN_PYTHON:
+ status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED;
+ goto end;
+ case LTTNG_DOMAIN_UST:
+ /* Exclusions supported. */
+ break;
+ default:
+ abort();
+ }
+
+ if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ exclusion_copy = strdup(exclusion);
+ if (!exclusion_copy) {
+ status = LTTNG_EVENT_RULE_STATUS_ERROR;
+ goto end;
+ }
+
+ ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions,
+ exclusion_copy);
+ if (ret < 0) {
+ status = LTTNG_EVENT_RULE_STATUS_ERROR;
+ goto end;
+ }
+
+ exclusion_copy = NULL;
+end:
+ free(exclusion_copy);
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusions_count(
+ const struct lttng_event_rule *rule, unsigned int *count)
+{
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !count) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions);
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusion_at_index(
+ const struct lttng_event_rule *rule,
+ unsigned int index,
+ const char **exclusion)
+{
+ unsigned int count;
+ struct lttng_event_rule_tracepoint *tracepoint;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !exclusion) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ tracepoint = container_of(
+ rule, struct lttng_event_rule_tracepoint, parent);
+ if (lttng_event_rule_tracepoint_get_exclusions_count(rule, &count) !=
+ LTTNG_EVENT_RULE_STATUS_OK) {
+ goto end;
+ }
+
+ if (index >= count) {
+ goto end;
+ }
+
+ *exclusion = lttng_dynamic_pointer_array_get_pointer(
+ &tracepoint->exclusions, index);
+end:
+ return status;
+}
projects / lttng-tools.git / commitdiff
