-/*
- * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include <assert.h>
-#include <common/credentials.h>
-#include <common/error.h>
-#include <common/macros.h>
-#include <common/optional.h>
-#include <common/payload.h>
-#include <common/payload-view.h>
-#include <common/runas.h>
-#include <common/hashtable/hashtable.h>
-#include <common/hashtable/utils.h>
-#include <common/string-utils/string-utils.h>
-#include <lttng/event-rule/event-rule-internal.h>
-#include <lttng/event-rule/tracepoint-internal.h>
-#include <lttng/log-level-rule.h>
-#include <lttng/event.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, header_offset;
- size_t size_before_log_level_rule;
- 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;
- struct lttng_event_rule_tracepoint_comm *header;
-
- if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
- ret = -1;
- goto end;
- }
-
- header_offset = payload->buffer.size;
-
- DBG("Serializing tracepoint event rule.");
- tracepoint = container_of(
- rule, struct lttng_event_rule_tracepoint, parent);
-
- status = lttng_event_rule_tracepoint_get_name_pattern_exclusion_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_name_pattern_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.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;
- }
-
- size_before_log_level_rule = payload->buffer.size;
-
- ret = lttng_log_level_rule_serialize(tracepoint->log_level_rule, payload);
- if (ret < 0) {
- goto end;
- }
-
- header = (typeof(header)) ((char *) payload->buffer.data + header_offset);
- header->log_level_rule_len =
- payload->buffer.size - size_before_log_level_rule;
-
- for (i = 0; i < exclusion_count; i++) {
- size_t len;
- const char *exclusion;
-
- status = lttng_event_rule_tracepoint_get_name_pattern_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_name_pattern_exclusion_count(_a, &count_a);
- assert(status == LTTNG_EVENT_RULE_STATUS_OK);
- status = lttng_event_rule_tracepoint_get_name_pattern_exclusion_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 (!lttng_log_level_rule_is_equal(
- a->log_level_rule, b->log_level_rule)) {
- goto end;
- }
-
- for (i = 0; i < count_a; i++) {
- const char *exclusion_a, *exclusion_b;
-
- status = lttng_event_rule_tracepoint_get_name_pattern_exclusion_at_index(
- _a, i, &exclusion_a);
- assert(status == LTTNG_EVENT_RULE_STATUS_OK);
- status = lttng_event_rule_tracepoint_get_name_pattern_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;
- const struct lttng_log_level_rule *log_level_rule = NULL;
- enum lttng_event_rule_status status;
-
- assert(rule);
- assert(_agent_filter);
-
- status = lttng_event_rule_tracepoint_get_name_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;
- }
-
-
- /* 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;
- }
- }
-
- status = lttng_event_rule_tracepoint_get_log_level_rule(
- rule, &log_level_rule);
- if (status == LTTNG_EVENT_RULE_STATUS_OK) {
- enum lttng_log_level_rule_status llr_status;
- const char *op;
- int level;
-
- switch (lttng_log_level_rule_get_type(log_level_rule))
- {
- case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY:
- llr_status = lttng_log_level_rule_exactly_get_level(
- log_level_rule, &level);
- op = "==";
- break;
- case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS:
- llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level(
- log_level_rule, &level);
- op = ">=";
- break;
- default:
- abort();
- }
-
- if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) {
- ret = -1;
- goto end;
- }
-
- if (filter || agent_filter) {
- char *new_filter;
-
- err = asprintf(&new_filter,
- "(%s) && (int_loglevel %s %d)",
- agent_filter ? agent_filter : filter,
- op, level);
- if (agent_filter) {
- free(agent_filter);
- }
- agent_filter = new_filter;
- } else {
- err = asprintf(&agent_filter, "int_loglevel %s %d", op,
- level);
- }
-
- 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,
- const struct lttng_credentials *creds)
-{
- 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_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, creds,
- &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_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 enum lttng_event_rule_generate_exclusions_status
-lttng_event_rule_tracepoint_generate_exclusions(
- const struct lttng_event_rule *rule,
- struct lttng_event_exclusion **_exclusions)
-{
- unsigned int nb_exclusions = 0, i;
- enum lttng_domain_type domain_type;
- struct lttng_event_exclusion *exclusions;
- enum lttng_event_rule_status event_rule_status;
- enum lttng_event_rule_generate_exclusions_status ret_status;
-
- assert(_exclusions);
-
- event_rule_status = lttng_event_rule_tracepoint_get_domain_type(
- rule, &domain_type);
- assert(event_rule_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. */
- exclusions = NULL;
- ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE;
- goto end;
- case LTTNG_DOMAIN_UST:
- /* Exclusions supported. */
- break;
- default:
- /* Unknown domain. */
- abort();
- }
-
- event_rule_status = lttng_event_rule_tracepoint_get_name_pattern_exclusion_count(
- rule, &nb_exclusions);
- assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK);
- if (nb_exclusions == 0) {
- /* Nothing to do. */
- exclusions = NULL;
- ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE;
- goto end;
- }
-
- exclusions = zmalloc(sizeof(struct lttng_event_exclusion) +
- (LTTNG_SYMBOL_NAME_LEN * nb_exclusions));
- if (!exclusions) {
- PERROR("Failed to allocate exclusions buffer");
- ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OUT_OF_MEMORY;
- goto end;
- }
-
- exclusions->count = nb_exclusions;
- for (i = 0; i < nb_exclusions; i++) {
- int copy_ret;
- const char *exclusion_str;
-
- event_rule_status =
- lttng_event_rule_tracepoint_get_name_pattern_exclusion_at_index(
- rule, i, &exclusion_str);
- assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK);
-
- copy_ret = lttng_strncpy(exclusions->names[i], exclusion_str,
- LTTNG_SYMBOL_NAME_LEN);
- if (copy_ret) {
- free(exclusions);
- exclusions = NULL;
- ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_ERROR;
- goto end;
- }
- }
-
- ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OK;
-
-end:
- *_exclusions = exclusions;
- return ret_status;
-}
-
-static void destroy_lttng_exclusions_element(void *ptr)
-{
- free(ptr);
-}
-
-static unsigned long lttng_event_rule_tracepoint_hash(
- const struct lttng_event_rule *rule)
-{
- unsigned long hash;
- unsigned int i, exclusion_count;
- enum lttng_event_rule_status status;
- struct lttng_event_rule_tracepoint *tp_rule =
- container_of(rule, typeof(*tp_rule), parent);
-
- hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_TRACEPOINT,
- lttng_ht_seed);
- hash ^= hash_key_ulong((void *) tp_rule->domain, lttng_ht_seed);
- hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed);
-
- if (tp_rule->filter_expression) {
- hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed);
- }
-
- if (tp_rule->log_level_rule) {
- hash ^= lttng_log_level_rule_hash(tp_rule->log_level_rule);
- }
-
- status = lttng_event_rule_tracepoint_get_name_pattern_exclusion_count(rule,
- &exclusion_count);
- assert(status == LTTNG_EVENT_RULE_STATUS_OK);
-
- for (i = 0; i < exclusion_count; i++) {
- const char *exclusion;
-
- status = lttng_event_rule_tracepoint_get_name_pattern_exclusion_at_index(
- rule, i, &exclusion);
- assert(status == LTTNG_EVENT_RULE_STATUS_OK);
- hash ^= hash_key_str(exclusion, lttng_ht_seed);
- }
-
- return hash;
-}
-
-static struct lttng_event *lttng_event_rule_tracepoint_generate_lttng_event(
- const struct lttng_event_rule *rule)
-{
- int ret;
- const struct lttng_event_rule_tracepoint *tracepoint;
- struct lttng_event *local_event = NULL;
- struct lttng_event *event = NULL;
- enum lttng_loglevel_type loglevel_type;
- int loglevel_value = 0;
- enum lttng_event_rule_status status;
- const struct lttng_log_level_rule *log_level_rule;
-
- tracepoint = container_of(
- rule, const struct lttng_event_rule_tracepoint, parent);
-
- local_event = zmalloc(sizeof(*local_event));
- if (!local_event) {
- goto error;
- }
-
- local_event->type = LTTNG_EVENT_TRACEPOINT;
- ret = lttng_strncpy(local_event->name, tracepoint->pattern,
- sizeof(local_event->name));
- if (ret) {
- ERR("Truncation occurred when copying event rule pattern to `lttng_event` structure: pattern = '%s'",
- tracepoint->pattern);
- goto error;
- }
-
-
- /* Map the log level rule to an equivalent lttng_loglevel. */
- status = lttng_event_rule_tracepoint_get_log_level_rule(
- rule, &log_level_rule);
- if (status == LTTNG_EVENT_RULE_STATUS_UNSET) {
- loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
- loglevel_value = 0;
- } else if (status == LTTNG_EVENT_RULE_STATUS_OK) {
- enum lttng_log_level_rule_status llr_status;
-
- switch (lttng_log_level_rule_get_type(log_level_rule)) {
- case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY:
- llr_status = lttng_log_level_rule_exactly_get_level(
- log_level_rule, &loglevel_value);
- loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
- break;
- case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS:
- llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level(
- log_level_rule, &loglevel_value);
- loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
- break;
- default:
- abort();
- break;
- }
-
- if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) {
- goto error;
- }
- } else {
- goto error;
- }
-
- local_event->loglevel_type = loglevel_type;
- local_event->loglevel = loglevel_value;
-
- event = local_event;
- local_event = NULL;
-error:
- free(local_event);
- return event;
-}
-
-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;
- enum lttng_event_rule_status status;
-
- 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->parent.hash = lttng_event_rule_tracepoint_hash;
- tp_rule->parent.generate_lttng_event =
- lttng_event_rule_tracepoint_generate_lttng_event;
-
- tp_rule->domain = domain_type;
- tp_rule->log_level_rule = NULL;
-
- lttng_dynamic_pointer_array_init(&tp_rule->exclusions,
- destroy_lttng_exclusions_element);
-
- /* Default pattern is '*'. */
- status = lttng_event_rule_tracepoint_set_name_pattern(rule, "*");
- if (status != LTTNG_EVENT_RULE_STATUS_OK) {
- lttng_event_rule_destroy(rule);
- rule = NULL;
- }
-
-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;
- 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;
- struct lttng_log_level_rule *log_level_rule = NULL;
-
- if (!_event_rule) {
- ret = -1;
- goto end;
- }
-
- current_buffer_view = lttng_buffer_view_from_view(
- &view->buffer, offset, sizeof(*tracepoint_comm));
- if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
- ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header.");
- ret = -1;
- goto end;
- }
-
- tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data;
-
- 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;
- }
-
- /* 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);
-
- if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
- ret = -1;
- goto end;
- }
-
- pattern = current_buffer_view.data;
- 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);
- if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
- ret = -1;
- goto end;
- }
-
- filter_expression = current_buffer_view.data;
- 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:
- if (!tracepoint_comm->log_level_rule_len) {
- goto skip_log_level_rule;
- }
-
- {
- /* Map the log level rule. */
- struct lttng_payload_view current_payload_view =
- lttng_payload_view_from_view(view, offset,
- tracepoint_comm->log_level_rule_len);
-
- ret = lttng_log_level_rule_create_from_payload(
- ¤t_payload_view, &log_level_rule);
- if (ret < 0) {
- ret = -1;
- goto end;
- }
-
- assert(ret == tracepoint_comm->log_level_rule_len);
- }
-
- /* Skip after the log level rule. */
- offset += tracepoint_comm->log_level_rule_len;
-
-skip_log_level_rule:
- for (i = 0; i < tracepoint_comm->exclusions_count; i++) {
- current_buffer_view = lttng_buffer_view_from_view(
- &view->buffer, offset, sizeof(*exclusion_len));
- if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
- ret = -1;
- goto end;
- }
-
- exclusion_len = (typeof(exclusion_len)) current_buffer_view.data;
- offset += sizeof(*exclusion_len);
-
- current_buffer_view = lttng_buffer_view_from_view(
- &view->buffer, offset, *exclusion_len);
- if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
- ret = -1;
- goto end;
- }
-
- 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_name_pattern_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_name_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;
- }
- }
-
- if (log_level_rule) {
- status = lttng_event_rule_tracepoint_set_log_level_rule(
- rule, log_level_rule);
- if (status != LTTNG_EVENT_RULE_STATUS_OK) {
- ERR("Failed to set event rule tracepoint log level rule.");
- ret = -1;
- goto end;
- }
- }
-
- *_event_rule = rule;
- rule = NULL;
- ret = offset;
-end:
- free(exclusions);
- lttng_log_level_rule_destroy(log_level_rule);
- lttng_event_rule_destroy(rule);
- return ret;
-}
-
-enum lttng_event_rule_status lttng_event_rule_tracepoint_set_name_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;
- }
-
- /* Normalize the pattern. */
- strutils_normalize_star_glob_pattern(pattern_copy);
-
- free(tracepoint->pattern);
-
- tracepoint->pattern = pattern_copy;
- pattern_copy = NULL;
-end:
- return status;
-}
-
-enum lttng_event_rule_status lttng_event_rule_tracepoint_get_name_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_rule_valid(const struct lttng_log_level_rule *rule,
- enum lttng_domain_type domain)
-{
- bool valid = false;
- enum lttng_log_level_rule_status status;
- int level;
-
- switch (lttng_log_level_rule_get_type(rule)) {
- case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY:
- status = lttng_log_level_rule_exactly_get_level(rule, &level);
- break;
- case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS:
- status = lttng_log_level_rule_at_least_as_severe_as_get_level(
- rule, &level);
- break;
- default:
- abort();
- }
-
- assert(status == LTTNG_LOG_LEVEL_RULE_STATUS_OK);
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- valid = false;
- break;
- 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
- * span 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
- * validates against the int type implying that negative values
- * are accepted.
- */
- valid = true;
- goto end;
- case LTTNG_DOMAIN_NONE:
- default:
- abort();
- }
-
-end:
- return valid;
-}
-
-static bool domain_supports_log_levels(enum lttng_domain_type domain)
-{
- bool supported;
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- supported = false;
- break;
- case LTTNG_DOMAIN_UST:
- case LTTNG_DOMAIN_JUL:
- case LTTNG_DOMAIN_LOG4J:
- case LTTNG_DOMAIN_PYTHON:
- supported = true;
- break;
- default:
- abort();
- }
-
- return supported;
-}
-
-enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_rule(
- struct lttng_event_rule *rule,
- const struct lttng_log_level_rule *log_level_rule)
-{
- struct lttng_event_rule_tracepoint *tracepoint;
- enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
- struct lttng_log_level_rule *copy = NULL;
-
- 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 (!domain_supports_log_levels(tracepoint->domain)) {
- status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED;
- goto end;
- }
-
- if (!log_level_rule_valid(log_level_rule, tracepoint->domain)) {
- status = LTTNG_EVENT_RULE_STATUS_INVALID;
- goto end;
- }
-
- copy = lttng_log_level_rule_copy(log_level_rule);
- if (copy == NULL) {
- status = LTTNG_EVENT_RULE_STATUS_ERROR;
- goto end;
- }
-
- if (tracepoint->log_level_rule) {
- lttng_log_level_rule_destroy(tracepoint->log_level_rule);
- }
-
- tracepoint->log_level_rule = copy;
-
-end:
- return status;
-}
-
-enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_rule(
- const struct lttng_event_rule *rule,
- const struct lttng_log_level_rule **log_level_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) || !log_level_rule) {
- status = LTTNG_EVENT_RULE_STATUS_INVALID;
- goto end;
- }
-
- tracepoint = container_of(
- rule, struct lttng_event_rule_tracepoint, parent);
- if (tracepoint->log_level_rule == NULL) {
- status = LTTNG_EVENT_RULE_STATUS_UNSET;
- goto end;
- }
-
- *log_level_rule = tracepoint->log_level_rule;
-end:
- return status;
-}
-
-enum lttng_event_rule_status lttng_event_rule_tracepoint_add_name_pattern_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_name_pattern_exclusion_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_name_pattern_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_name_pattern_exclusion_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
