X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftrigger.c;h=76082a0855d05bb7571f8e017a41f244748dac6b;hp=71162e79bad63154b070b323ef75560ae89a72aa;hb=HEAD;hpb=f2e97f594f0c730f933b5f9840938d878b13e26b diff --git a/src/common/trigger.c b/src/common/trigger.c deleted file mode 100644 index 71162e79b..000000000 --- a/src/common/trigger.c +++ /dev/null @@ -1,1015 +0,0 @@ -/* - * Copyright (C) 2017 Jérémie Galarneau - * - * SPDX-License-Identifier: LGPL-2.1-only - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -LTTNG_HIDDEN -bool lttng_trigger_validate(const struct lttng_trigger *trigger) -{ - bool valid; - - if (!trigger) { - valid = false; - goto end; - } - - if (!trigger->creds.uid.is_set) { - valid = false; - goto end; - } - - valid = lttng_condition_validate(trigger->condition) && - lttng_action_validate(trigger->action); -end: - return valid; -} - -struct lttng_trigger *lttng_trigger_create( - struct lttng_condition *condition, - struct lttng_action *action) -{ - struct lttng_trigger *trigger = NULL; - - if (!condition || !action) { - goto end; - } - - trigger = zmalloc(sizeof(struct lttng_trigger)); - if (!trigger) { - goto end; - } - - urcu_ref_init(&trigger->ref); - - trigger->firing_policy.type = LTTNG_TRIGGER_FIRING_POLICY_EVERY_N; - trigger->firing_policy.threshold = 1; - - lttng_condition_get(condition); - trigger->condition = condition; - - lttng_action_get(action); - trigger->action = action; - -end: - return trigger; -} - -/* - * Note: the lack of reference counting 'get' on the condition object is normal. - * This API was exposed as such in 2.11. The client is not expected to call - * lttng_condition_destroy on the returned object. - */ -struct lttng_condition *lttng_trigger_get_condition( - struct lttng_trigger *trigger) -{ - return trigger ? trigger->condition : NULL; -} - -const struct lttng_condition *lttng_trigger_get_const_condition( - const struct lttng_trigger *trigger) -{ - return trigger ? trigger->condition : NULL; -} - - -/* - * Note: the lack of reference counting 'get' on the action object is normal. - * This API was exposed as such in 2.11. The client is not expected to call - * lttng_action_destroy on the returned object. - */ -struct lttng_action *lttng_trigger_get_action( - struct lttng_trigger *trigger) -{ - return trigger ? trigger->action : NULL; -} - -const struct lttng_action *lttng_trigger_get_const_action( - const struct lttng_trigger *trigger) -{ - return trigger ? trigger->action : NULL; -} - -static void trigger_destroy_ref(struct urcu_ref *ref) -{ - struct lttng_trigger *trigger = - container_of(ref, struct lttng_trigger, ref); - struct lttng_action *action = lttng_trigger_get_action(trigger); - struct lttng_condition *condition = - lttng_trigger_get_condition(trigger); - - assert(action); - assert(condition); - - /* Release ownership. */ - lttng_action_put(action); - lttng_condition_put(condition); - - free(trigger->name); - free(trigger); -} - -void lttng_trigger_destroy(struct lttng_trigger *trigger) -{ - lttng_trigger_put(trigger); -} - -static bool is_firing_policy_valid(enum lttng_trigger_firing_policy policy) -{ - bool valid = false; - - switch (policy) { - case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N: - case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N: - valid = true; - break; - default: - valid = false; - break; - } - - return valid; -} - -LTTNG_HIDDEN -ssize_t lttng_trigger_create_from_payload( - struct lttng_payload_view *src_view, - struct lttng_trigger **_trigger) -{ - ssize_t ret, offset = 0, condition_size, action_size, name_size = 0; - struct lttng_condition *condition = NULL; - struct lttng_action *action = NULL; - const struct lttng_trigger_comm *trigger_comm; - const char *name = NULL; - uint64_t firing_policy_threshold; - enum lttng_trigger_firing_policy firing_policy; - struct lttng_credentials creds = { - .uid = LTTNG_OPTIONAL_INIT_UNSET, - .gid = LTTNG_OPTIONAL_INIT_UNSET, - }; - struct lttng_trigger *trigger = NULL; - const struct lttng_payload_view trigger_comm_view = - lttng_payload_view_from_view( - src_view, 0, sizeof(*trigger_comm)); - - if (!src_view || !_trigger) { - ret = -1; - goto end; - } - - if (!lttng_payload_view_is_valid(&trigger_comm_view)) { - /* Payload not large enough to contain the header. */ - ret = -1; - goto end; - } - - /* lttng_trigger_comm header */ - trigger_comm = (typeof(trigger_comm)) trigger_comm_view.buffer.data; - - /* Set the trigger's creds. */ - if (trigger_comm->uid > (uint64_t) ((uid_t) -1)) { - /* UID out of range for this platform. */ - ret = -1; - goto end; - } - - LTTNG_OPTIONAL_SET(&creds.uid, trigger_comm->uid); - - offset += sizeof(*trigger_comm); - - firing_policy = trigger_comm->firing_policy_type; - if (!is_firing_policy_valid(firing_policy)) { - ret =-1; - goto end; - } - - firing_policy_threshold = trigger_comm->firing_policy_threshold; - if (trigger_comm->name_length != 0) { - /* Name. */ - const struct lttng_payload_view name_view = - lttng_payload_view_from_view( - src_view, offset, - trigger_comm->name_length); - - if (!lttng_payload_view_is_valid(&name_view)) { - ret = -1; - goto end; - } - - name = name_view.buffer.data; - if (!lttng_buffer_view_contains_string(&name_view.buffer, name, - trigger_comm->name_length)) { - ret = -1; - goto end; - } - - offset += trigger_comm->name_length; - name_size = trigger_comm->name_length; - } - - { - /* struct lttng_condition */ - struct lttng_payload_view condition_view = - lttng_payload_view_from_view( - src_view, offset, -1); - - condition_size = lttng_condition_create_from_payload(&condition_view, - &condition); - } - - if (condition_size < 0) { - ret = condition_size; - goto end; - } - - offset += condition_size; - { - /* struct lttng_action */ - struct lttng_payload_view action_view = - lttng_payload_view_from_view( - src_view, offset, -1); - - action_size = lttng_action_create_from_payload(&action_view, &action); - } - - if (action_size < 0) { - ret = action_size; - goto end; - } - offset += action_size; - - /* Unexpected size of inner-elements; the buffer is corrupted. */ - if ((ssize_t) trigger_comm->length != condition_size + action_size + name_size) { - ret = -1; - goto error; - } - - trigger = lttng_trigger_create(condition, action); - if (!trigger) { - ret = -1; - goto error; - } - - lttng_trigger_set_credentials(trigger, &creds); - - /* - * The trigger object owns references to the action and condition - * objects. - */ - lttng_condition_put(condition); - condition = NULL; - - lttng_action_put(action); - action = NULL; - - if (name) { - const enum lttng_trigger_status status = - lttng_trigger_set_name(trigger, name); - - if (status != LTTNG_TRIGGER_STATUS_OK) { - ret = -1; - goto end; - } - } - - /* Set the policy. */ - { - const enum lttng_trigger_status status = - lttng_trigger_set_firing_policy(trigger, - firing_policy, - firing_policy_threshold); - - if (status != LTTNG_TRIGGER_STATUS_OK) { - ret = -1; - goto end; - } - } - - ret = offset; - -error: - lttng_condition_put(condition); - lttng_action_put(action); -end: - if (ret >= 0) { - *_trigger = trigger; - } else { - lttng_trigger_put(trigger); - } - - return ret; -} - -/* - * Both elements are stored contiguously, see their "*_comm" structure - * for the detailed format. - */ -LTTNG_HIDDEN -int lttng_trigger_serialize(const struct lttng_trigger *trigger, - struct lttng_payload *payload) -{ - int ret; - size_t header_offset, size_before_payload, size_name; - struct lttng_trigger_comm trigger_comm = {}; - struct lttng_trigger_comm *header; - const struct lttng_credentials *creds = NULL; - - creds = lttng_trigger_get_credentials(trigger); - assert(creds); - - trigger_comm.uid = LTTNG_OPTIONAL_GET(creds->uid); - - if (trigger->name != NULL) { - size_name = strlen(trigger->name) + 1; - } else { - size_name = 0; - } - - trigger_comm.name_length = size_name; - trigger_comm.firing_policy_type = (uint8_t) trigger->firing_policy.type; - trigger_comm.firing_policy_threshold = (uint64_t) trigger->firing_policy.threshold; - - header_offset = payload->buffer.size; - ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm, - sizeof(trigger_comm)); - if (ret) { - goto end; - } - - size_before_payload = payload->buffer.size; - - /* Trigger name. */ - ret = lttng_dynamic_buffer_append( - &payload->buffer, trigger->name, size_name); - if (ret) { - goto end; - } - - ret = lttng_condition_serialize(trigger->condition, payload); - if (ret) { - goto end; - } - - ret = lttng_action_serialize(trigger->action, payload); - if (ret) { - goto end; - } - - /* Update payload size. */ - header = (typeof(header)) (payload->buffer.data + header_offset); - header->length = payload->buffer.size - size_before_payload; -end: - return ret; -} - -LTTNG_HIDDEN -bool lttng_trigger_is_equal( - const struct lttng_trigger *a, const struct lttng_trigger *b) -{ - if (a->firing_policy.type != b->firing_policy.type) { - return false; - } - - if (a->firing_policy.threshold != b->firing_policy.threshold) { - return false; - } - - /* - * Name is not taken into account since it is cosmetic only. - */ - if (!lttng_condition_is_equal(a->condition, b->condition)) { - return false; - } - - if (!lttng_action_is_equal(a->action, b->action)) { - return false; - } - - if (!lttng_credentials_is_equal(lttng_trigger_get_credentials(a), - lttng_trigger_get_credentials(b))) { - return false; - } - - return true; -} - -enum lttng_trigger_status lttng_trigger_set_name(struct lttng_trigger *trigger, - const char* name) -{ - char *name_copy = NULL; - enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; - - if (!trigger || !name || - strlen(name) == 0) { - status = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - name_copy = strdup(name); - if (!name_copy) { - status = LTTNG_TRIGGER_STATUS_ERROR; - goto end; - } - - free(trigger->name); - - trigger->name = name_copy; - name_copy = NULL; -end: - return status; -} - -enum lttng_trigger_status lttng_trigger_get_name( - const struct lttng_trigger *trigger, const char **name) -{ - enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; - - if (!trigger || !name) { - status = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - if (!trigger->name) { - status = LTTNG_TRIGGER_STATUS_UNSET; - } - - *name = trigger->name; -end: - return status; -} - -LTTNG_HIDDEN -int lttng_trigger_assign_name(struct lttng_trigger *dst, - const struct lttng_trigger *src) -{ - int ret = 0; - enum lttng_trigger_status status; - - status = lttng_trigger_set_name(dst, src->name); - if (status != LTTNG_TRIGGER_STATUS_OK) { - ret = -1; - ERR("Failed to set name for trigger"); - goto end; - } -end: - return ret; -} - -LTTNG_HIDDEN -void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger, - uint64_t token) -{ - assert(trigger); - LTTNG_OPTIONAL_SET(&trigger->tracer_token, token); -} - -LTTNG_HIDDEN -uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger) -{ - assert(trigger); - - return LTTNG_OPTIONAL_GET(trigger->tracer_token); -} - -LTTNG_HIDDEN -int lttng_trigger_generate_name(struct lttng_trigger *trigger, - uint64_t unique_id) -{ - int ret = 0; - char *generated_name = NULL; - - ret = asprintf(&generated_name, "T%" PRIu64 "", unique_id); - if (ret < 0) { - ERR("Failed to generate trigger name"); - ret = -1; - goto end; - } - - ret = 0; - free(trigger->name); - trigger->name = generated_name; -end: - return ret; -} - -LTTNG_HIDDEN -void lttng_trigger_get(struct lttng_trigger *trigger) -{ - urcu_ref_get(&trigger->ref); -} - -LTTNG_HIDDEN -void lttng_trigger_put(struct lttng_trigger *trigger) -{ - if (!trigger) { - return; - } - - urcu_ref_put(&trigger->ref , trigger_destroy_ref); -} - -static void delete_trigger_array_element(void *ptr) -{ - struct lttng_trigger *trigger = ptr; - - lttng_trigger_put(trigger); -} - -LTTNG_HIDDEN -struct lttng_triggers *lttng_triggers_create(void) -{ - struct lttng_triggers *triggers = NULL; - - triggers = zmalloc(sizeof(*triggers)); - if (!triggers) { - goto end; - } - - lttng_dynamic_pointer_array_init(&triggers->array, delete_trigger_array_element); - -end: - return triggers; -} - -LTTNG_HIDDEN -struct lttng_trigger *lttng_triggers_borrow_mutable_at_index( - const struct lttng_triggers *triggers, unsigned int index) -{ - struct lttng_trigger *trigger = NULL; - - assert(triggers); - if (index >= lttng_dynamic_pointer_array_get_count(&triggers->array)) { - goto end; - } - - trigger = (struct lttng_trigger *) - lttng_dynamic_pointer_array_get_pointer( - &triggers->array, index); -end: - return trigger; -} - -LTTNG_HIDDEN -int lttng_triggers_add( - struct lttng_triggers *triggers, struct lttng_trigger *trigger) -{ - int ret; - - assert(triggers); - assert(trigger); - - lttng_trigger_get(trigger); - - ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger); - if (ret) { - lttng_trigger_put(trigger); - } - - return ret; -} - -const struct lttng_trigger *lttng_triggers_get_at_index( - const struct lttng_triggers *triggers, unsigned int index) -{ - return lttng_triggers_borrow_mutable_at_index(triggers, index); -} - -enum lttng_trigger_status lttng_triggers_get_count(const struct lttng_triggers *triggers, unsigned int *count) -{ - enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; - - if (!triggers || !count) { - status = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - *count = lttng_dynamic_pointer_array_get_count(&triggers->array); -end: - return status; -} - -void lttng_triggers_destroy(struct lttng_triggers *triggers) -{ - if (!triggers) { - return; - } - - lttng_dynamic_pointer_array_reset(&triggers->array); - free(triggers); -} - -int lttng_triggers_serialize(const struct lttng_triggers *triggers, - struct lttng_payload *payload) -{ - int ret; - unsigned int i, count; - size_t size_before_payload; - struct lttng_triggers_comm triggers_comm = {}; - struct lttng_triggers_comm *header; - enum lttng_trigger_status status; - const size_t header_offset = payload->buffer.size; - - status = lttng_triggers_get_count(triggers, &count); - if (status != LTTNG_TRIGGER_STATUS_OK) { - ret = LTTNG_ERR_INVALID; - goto end; - } - - triggers_comm.count = count; - - /* Placeholder header; updated at the end. */ - ret = lttng_dynamic_buffer_append(&payload->buffer, &triggers_comm, - sizeof(triggers_comm)); - if (ret) { - goto end; - } - - size_before_payload = payload->buffer.size; - - for (i = 0; i < count; i++) { - const struct lttng_trigger *trigger = - lttng_triggers_get_at_index(triggers, i); - - assert(trigger); - - ret = lttng_trigger_serialize(trigger, payload); - if (ret) { - goto end; - } - } - - /* Update payload size. */ - header = (struct lttng_triggers_comm *) ((char *) payload->buffer.data + header_offset); - header->length = payload->buffer.size - size_before_payload; -end: - return ret; -} - -LTTNG_HIDDEN -ssize_t lttng_triggers_create_from_payload( - struct lttng_payload_view *src_view, - struct lttng_triggers **triggers) -{ - ssize_t ret, offset = 0, triggers_size = 0; - unsigned int i; - const struct lttng_triggers_comm *triggers_comm; - struct lttng_triggers *local_triggers = NULL; - - if (!src_view || !triggers) { - ret = -1; - goto error; - } - - /* lttng_trigger_comms header */ - triggers_comm = (const struct lttng_triggers_comm *) src_view->buffer.data; - offset += sizeof(*triggers_comm); - - local_triggers = lttng_triggers_create(); - if (!local_triggers) { - ret = -1; - goto error; - } - - for (i = 0; i < triggers_comm->count; i++) { - struct lttng_trigger *trigger = NULL; - struct lttng_payload_view trigger_view = - lttng_payload_view_from_view(src_view, offset, -1); - ssize_t trigger_size; - - trigger_size = lttng_trigger_create_from_payload( - &trigger_view, &trigger); - if (trigger_size < 0) { - ret = trigger_size; - goto error; - } - - /* Transfer ownership of the trigger to the collection. */ - ret = lttng_triggers_add(local_triggers, trigger); - lttng_trigger_put(trigger); - if (ret < 0) { - ret = -1; - goto error; - } - - offset += trigger_size; - triggers_size += trigger_size; - } - - /* Unexpected size of inner-elements; the buffer is corrupted. */ - if ((ssize_t) triggers_comm->length != triggers_size) { - ret = -1; - goto error; - } - - /* Pass ownership to caller. */ - *triggers = local_triggers; - local_triggers = NULL; - - ret = offset; -error: - - lttng_triggers_destroy(local_triggers); - return ret; -} - -LTTNG_HIDDEN -const struct lttng_credentials *lttng_trigger_get_credentials( - const struct lttng_trigger *trigger) -{ - return &trigger->creds; -} - -LTTNG_HIDDEN -void lttng_trigger_set_credentials(struct lttng_trigger *trigger, - const struct lttng_credentials *creds) -{ - assert(creds); - trigger->creds = *creds; -} - -enum lttng_trigger_status lttng_trigger_set_owner_uid( - struct lttng_trigger *trigger, uid_t uid) -{ - enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; - const struct lttng_credentials creds = { - .uid = LTTNG_OPTIONAL_INIT_VALUE(uid), - .gid = LTTNG_OPTIONAL_INIT_UNSET, - }; - - if (!trigger) { - ret = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - /* Client-side validation only to report a clearer error. */ - if (geteuid() != 0) { - ret = LTTNG_TRIGGER_STATUS_PERMISSION_DENIED; - goto end; - } - - lttng_trigger_set_credentials(trigger, &creds); - -end: - return ret; -} - -enum lttng_trigger_status lttng_trigger_get_owner_uid( - const struct lttng_trigger *trigger, uid_t *uid) -{ - enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; - const struct lttng_credentials *creds = NULL; - - if (!trigger || !uid ) { - ret = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - if (!trigger->creds.uid.is_set ) { - ret = LTTNG_TRIGGER_STATUS_UNSET; - goto end; - } - - creds = lttng_trigger_get_credentials(trigger); - *uid = lttng_credentials_get_uid(creds); - -end: - return ret; -} - -enum lttng_trigger_status lttng_trigger_set_firing_policy( - struct lttng_trigger *trigger, - enum lttng_trigger_firing_policy policy_type, - uint64_t threshold) -{ - enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; - assert(trigger); - - if (threshold < 1) { - ret = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - trigger->firing_policy.type = policy_type; - trigger->firing_policy.threshold = threshold; - -end: - return ret; -} - -enum lttng_trigger_status lttng_trigger_get_firing_policy( - const struct lttng_trigger *trigger, - enum lttng_trigger_firing_policy *policy_type, - uint64_t *threshold) -{ - enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; - - if (!trigger || !policy_type || !threshold) { - status = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - *policy_type = trigger->firing_policy.type; - *threshold = trigger->firing_policy.threshold; - -end: - return status; -} - -LTTNG_HIDDEN -bool lttng_trigger_should_fire(const struct lttng_trigger *trigger) -{ - bool ready_to_fire = false; - - assert(trigger); - - switch (trigger->firing_policy.type) { - case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N: - if (trigger->firing_policy.current_count < trigger->firing_policy.threshold) { - ready_to_fire = true; - } - break; - case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N: - if (trigger->firing_policy.current_count < trigger->firing_policy.threshold) { - ready_to_fire = true; - } - break; - default: - abort(); - }; - - return ready_to_fire; -} - -LTTNG_HIDDEN -void lttng_trigger_fire(struct lttng_trigger *trigger) -{ - assert(trigger); - - trigger->firing_policy.current_count++; - - switch (trigger->firing_policy.type) { - case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N: - if (trigger->firing_policy.current_count == trigger->firing_policy.threshold) { - trigger->firing_policy.current_count = 0; - } - - break; - case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N: - /* - * TODO: - * As an optimisation, deactivate the trigger condition and - * remove any checks in the traced application or kernel since - * the trigger will never fire again. - */ - break; - default: - abort(); - }; -} - -LTTNG_HIDDEN -enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction( - const struct lttng_trigger *trigger) -{ - enum lttng_domain_type type = LTTNG_DOMAIN_NONE; - const struct lttng_event_rule *event_rule; - enum lttng_condition_status c_status; - enum lttng_condition_type c_type; - - assert(trigger); - assert(trigger->condition); - - c_type = lttng_condition_get_type(trigger->condition); - assert (c_type != LTTNG_CONDITION_TYPE_UNKNOWN); - - switch (c_type) { - case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: - case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: - case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: - /* Apply to any domain. */ - type = LTTNG_DOMAIN_NONE; - break; - case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT: - /* Return the domain of the event rule. */ - c_status = lttng_condition_event_rule_get_rule( - trigger->condition, &event_rule); - assert(c_status == LTTNG_CONDITION_STATUS_OK); - type = lttng_event_rule_get_domain_type(event_rule); - break; - case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: - case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: - /* Return the domain of the channel being monitored. */ - c_status = lttng_condition_buffer_usage_get_domain_type( - trigger->condition, &type); - assert(c_status == LTTNG_CONDITION_STATUS_OK); - break; - default: - abort(); - } - - return type; -} - -/* - * Generate bytecode related to the trigger. - * On success LTTNG_OK. On error, returns lttng_error code. - */ -LTTNG_HIDDEN -enum lttng_error_code lttng_trigger_generate_bytecode( - struct lttng_trigger *trigger, - const struct lttng_credentials *creds) -{ - enum lttng_error_code ret; - struct lttng_condition *condition = NULL; - - condition = lttng_trigger_get_condition(trigger); - if (!condition) { - ret = LTTNG_ERR_INVALID_TRIGGER; - goto end; - } - - switch (lttng_condition_get_type(condition)) { - case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT: - { - struct lttng_event_rule *event_rule; - const enum lttng_condition_status condition_status = - lttng_condition_event_rule_borrow_rule_mutable( - condition, &event_rule); - - assert(condition_status == LTTNG_CONDITION_STATUS_OK); - - /* Generate the filter bytecode. */ - ret = lttng_event_rule_generate_filter_bytecode( - event_rule, creds); - if (ret != LTTNG_OK) { - goto end; - } - - /* Generate the capture bytecode. */ - ret = lttng_condition_event_rule_generate_capture_descriptor_bytecode( - condition); - if (ret != LTTNG_OK) { - goto end; - } - - ret = LTTNG_OK; - break; - } - default: - ret = LTTNG_OK; - break; - } -end: - return ret; -} - -LTTNG_HIDDEN -struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger) -{ - int ret; - struct lttng_payload copy_buffer; - struct lttng_trigger *copy = NULL; - - lttng_payload_init(©_buffer); - - ret = lttng_trigger_serialize(trigger, ©_buffer); - if (ret < 0) { - goto end; - } - - { - struct lttng_payload_view view = - lttng_payload_view_from_payload( - ©_buffer, 0, -1); - ret = lttng_trigger_create_from_payload( - &view, ©); - if (ret < 0) { - copy = NULL; - goto end; - } - } - -end: - lttng_payload_reset(©_buffer); - return copy; -}