+++ /dev/null
-/*
- * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include <common/credentials.h>
-#include <common/dynamic-array.h>
-#include <common/error.h>
-#include <common/mi-lttng.h>
-#include <common/optional.h>
-#include <common/payload-view.h>
-#include <common/payload.h>
-#include <inttypes.h>
-#include <lttng/action/action-internal.h>
-#include <lttng/condition/buffer-usage.h>
-#include <lttng/condition/condition-internal.h>
-#include <lttng/condition/event-rule-matches-internal.h>
-#include <lttng/condition/event-rule-matches.h>
-#include <lttng/domain.h>
-#include <lttng/error-query-internal.h>
-#include <lttng/event-expr-internal.h>
-#include <lttng/event-rule/event-rule-internal.h>
-#include <lttng/trigger/trigger-internal.h>
-#include <pthread.h>
-
-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);
-
- lttng_condition_get(condition);
- trigger->condition = condition;
-
- lttng_action_get(action);
- trigger->action = action;
-
- pthread_mutex_init(&trigger->lock, NULL);
- trigger->registered = false;
-
-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);
-
- LTTNG_ASSERT(action);
- LTTNG_ASSERT(condition);
-
- /* Release ownership. */
- lttng_action_put(action);
- lttng_condition_put(condition);
-
- pthread_mutex_destroy(&trigger->lock);
-
- free(trigger->name);
- free(trigger);
-}
-
-void lttng_trigger_destroy(struct lttng_trigger *trigger)
-{
- lttng_trigger_put(trigger);
-}
-
-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;
- 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);
-
- 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;
- }
- }
-
- 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.
- */
-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);
- LTTNG_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;
-
- 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;
-}
-
-bool lttng_trigger_is_equal(
- const struct lttng_trigger *a, const struct lttng_trigger *b)
-{
- if (!!a->name != !!b->name) {
- /* Both must be either anonymous or named. */
- return false;
- }
-
- if (a->name && strcmp(a->name, b->name) != 0) {
- return false;
- }
-
- 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;
- }
-
- if (a->is_hidden != b->is_hidden) {
- return false;
- }
-
- return true;
-}
-
-bool lttng_trigger_is_hidden(const struct lttng_trigger *trigger)
-{
- return trigger->is_hidden;
-}
-
-void lttng_trigger_set_hidden(struct lttng_trigger *trigger)
-{
- LTTNG_ASSERT(!trigger->is_hidden);
- trigger->is_hidden = 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) {
- status = LTTNG_TRIGGER_STATUS_INVALID;
- goto end;
- }
-
- if (name) {
- 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;
-}
-
-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;
-}
-
-void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger,
- uint64_t token)
-{
- LTTNG_ASSERT(trigger);
- LTTNG_OPTIONAL_SET(&trigger->tracer_token, token);
-}
-
-uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger)
-{
- LTTNG_ASSERT(trigger);
-
- return LTTNG_OPTIONAL_GET(trigger->tracer_token);
-}
-
-int lttng_trigger_generate_name(struct lttng_trigger *trigger,
- uint64_t unique_id)
-{
- int ret = 0;
- char *generated_name = NULL;
-
- ret = asprintf(&generated_name, "trigger%" 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;
-}
-
-void lttng_trigger_get(struct lttng_trigger *trigger)
-{
- urcu_ref_get(&trigger->ref);
-}
-
-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);
-}
-
-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;
-}
-
-struct lttng_trigger *lttng_triggers_borrow_mutable_at_index(
- const struct lttng_triggers *triggers, unsigned int index)
-{
- struct lttng_trigger *trigger = NULL;
-
- LTTNG_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;
-}
-
-int lttng_triggers_add(
- struct lttng_triggers *triggers, struct lttng_trigger *trigger)
-{
- int ret;
-
- LTTNG_ASSERT(triggers);
- LTTNG_ASSERT(trigger);
-
- lttng_trigger_get(trigger);
-
- ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger);
- if (ret) {
- lttng_trigger_put(trigger);
- }
-
- return ret;
-}
-
-int lttng_triggers_remove_hidden_triggers(struct lttng_triggers *triggers)
-{
- int ret;
- unsigned int trigger_count, i = 0;
- enum lttng_trigger_status trigger_status;
-
- LTTNG_ASSERT(triggers);
-
- trigger_status = lttng_triggers_get_count(triggers, &trigger_count);
- LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
-
- while (i < trigger_count) {
- const struct lttng_trigger *trigger =
- lttng_triggers_get_at_index(triggers, i);
-
- if (lttng_trigger_is_hidden(trigger)) {
- ret = lttng_dynamic_pointer_array_remove_pointer(
- &triggers->array, i);
- if (ret) {
- goto end;
- }
-
- trigger_count--;
- } else {
- i++;
- }
- }
-
- ret = 0;
-end:
- 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);
-
- LTTNG_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;
-}
-
-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;
-}
-
-const struct lttng_credentials *lttng_trigger_get_credentials(
- const struct lttng_trigger *trigger)
-{
- return &trigger->creds;
-}
-
-void lttng_trigger_set_credentials(struct lttng_trigger *trigger,
- const struct lttng_credentials *creds)
-{
- LTTNG_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 uid_t euid = geteuid();
- 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 (euid != 0 && euid != uid) {
- 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_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;
-
- LTTNG_ASSERT(trigger);
- LTTNG_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_MATCHES:
- /* Return the domain of the event rule. */
- c_status = lttng_condition_event_rule_matches_get_rule(
- trigger->condition, &event_rule);
- LTTNG_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);
- LTTNG_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.
- */
-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_MATCHES:
- {
- struct lttng_event_rule *event_rule;
- const enum lttng_condition_status condition_status =
- lttng_condition_event_rule_matches_borrow_rule_mutable(
- condition, &event_rule);
-
- LTTNG_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_matches_generate_capture_descriptor_bytecode(
- condition);
- if (ret != LTTNG_OK) {
- goto end;
- }
-
- ret = LTTNG_OK;
- break;
- }
- default:
- ret = LTTNG_OK;
- break;
- }
-end:
- return ret;
-}
-
-struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger)
-{
- int ret;
- struct lttng_payload copy_buffer;
- struct lttng_condition *condition_copy = NULL;
- struct lttng_action *action_copy = NULL;
- struct lttng_trigger *copy = NULL;
- enum lttng_trigger_status trigger_status;
- const char *trigger_name;
- uid_t trigger_owner_uid;
-
- lttng_payload_init(©_buffer);
-
- ret = lttng_condition_serialize(trigger->condition, ©_buffer);
- if (ret < 0) {
- goto end;
- }
-
- {
- struct lttng_payload_view view =
- lttng_payload_view_from_payload(
- ©_buffer, 0, -1);
-
- ret = lttng_condition_create_from_payload(
- &view, &condition_copy);
- if (ret < 0) {
- goto end;
- }
- }
-
- lttng_payload_clear(©_buffer);
-
- ret = lttng_action_serialize(trigger->action, ©_buffer);
- if (ret < 0) {
- goto end;
- }
-
- {
- struct lttng_payload_view view =
- lttng_payload_view_from_payload(
- ©_buffer, 0, -1);
-
- ret = lttng_action_create_from_payload(
- &view, &action_copy);
- if (ret < 0) {
- goto end;
- }
- }
-
- copy = lttng_trigger_create(condition_copy, action_copy);
- if (!copy) {
- ERR("Failed to allocate trigger during trigger copy");
- goto end;
- }
-
- trigger_status = lttng_trigger_get_name(trigger, &trigger_name);
- switch (trigger_status) {
- case LTTNG_TRIGGER_STATUS_OK:
- trigger_status = lttng_trigger_set_name(copy, trigger_name);
- if (trigger_status != LTTNG_TRIGGER_STATUS_OK) {
- ERR("Failed to set name of new trigger during copy");
- goto error_cleanup_trigger;
- }
- break;
- case LTTNG_TRIGGER_STATUS_UNSET:
- break;
- default:
- ERR("Failed to get name of original trigger during copy");
- goto error_cleanup_trigger;
- }
-
- trigger_status = lttng_trigger_get_owner_uid(
- trigger, &trigger_owner_uid);
- switch (trigger_status) {
- case LTTNG_TRIGGER_STATUS_OK:
- LTTNG_OPTIONAL_SET(©->creds.uid, trigger_owner_uid);
- break;
- case LTTNG_TRIGGER_STATUS_UNSET:
- break;
- default:
- ERR("Failed to get owner uid of original trigger during copy");
- goto error_cleanup_trigger;
- }
-
- copy->tracer_token = trigger->tracer_token;
- copy->registered = trigger->registered;
- copy->is_hidden = trigger->is_hidden;
- goto end;
-
-error_cleanup_trigger:
- lttng_trigger_destroy(copy);
- copy = NULL;
-end:
- lttng_condition_put(condition_copy);
- lttng_action_put(action_copy);
- lttng_payload_reset(©_buffer);
- return copy;
-}
-
-bool lttng_trigger_needs_tracer_notifier(const struct lttng_trigger *trigger)
-{
- bool needs_tracer_notifier = false;
- const struct lttng_condition *condition =
- lttng_trigger_get_const_condition(trigger);
-
- switch (lttng_condition_get_type(condition)) {
- case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES:
- needs_tracer_notifier = true;
- goto end;
- case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
- case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
- case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
- case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
- case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
- goto end;
- case LTTNG_CONDITION_TYPE_UNKNOWN:
- default:
- abort();
- }
-end:
- return needs_tracer_notifier;
-}
-
-void lttng_trigger_set_as_registered(struct lttng_trigger *trigger)
-{
- pthread_mutex_lock(&trigger->lock);
- trigger->registered = true;
- pthread_mutex_unlock(&trigger->lock);
-}
-
-void lttng_trigger_set_as_unregistered(struct lttng_trigger *trigger)
-{
- pthread_mutex_lock(&trigger->lock);
- trigger->registered = false;
- pthread_mutex_unlock(&trigger->lock);
-}
-
-/*
- * The trigger must be locked before calling lttng_trigger_registered.
- * The lock is necessary since a trigger can be unregistered at anytime.
- * Manipulations requiring that the trigger be registered must always acquire
- * the trigger lock for the duration of the manipulation using
- * `lttng_trigger_lock` and `lttng_trigger_unlock`.
- */
-bool lttng_trigger_is_registered(struct lttng_trigger *trigger)
-{
- ASSERT_LOCKED(trigger->lock);
- return trigger->registered;
-}
-
-void lttng_trigger_lock(struct lttng_trigger *trigger)
-{
- pthread_mutex_lock(&trigger->lock);
-}
-
-void lttng_trigger_unlock(struct lttng_trigger *trigger)
-{
- pthread_mutex_unlock(&trigger->lock);
-}
-
-enum lttng_error_code lttng_trigger_mi_serialize(const struct lttng_trigger *trigger,
- struct mi_writer *writer,
- const struct mi_lttng_error_query_callbacks
- *error_query_callbacks)
-{
- int ret;
- enum lttng_error_code ret_code;
- enum lttng_trigger_status trigger_status;
- const struct lttng_condition *condition = NULL;
- const struct lttng_action *action = NULL;
- struct lttng_dynamic_array action_path_indexes;
- uid_t owner_uid;
-
- LTTNG_ASSERT(trigger);
- LTTNG_ASSERT(writer);
-
- lttng_dynamic_array_init(&action_path_indexes, sizeof(uint64_t), NULL);
-
- /* Open trigger element. */
- ret = mi_lttng_writer_open_element(writer, mi_lttng_element_trigger);
- if (ret) {
- goto mi_error;
- }
-
- trigger_status = lttng_trigger_get_owner_uid(trigger, &owner_uid);
- LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
-
- /* Name. */
- ret = mi_lttng_writer_write_element_string(
- writer, config_element_name, trigger->name);
- if (ret) {
- goto mi_error;
- }
-
- /* Owner uid. */
- ret = mi_lttng_writer_write_element_signed_int(writer,
- mi_lttng_element_trigger_owner_uid,
- (int64_t) owner_uid);
- if (ret) {
- goto mi_error;
- }
-
- /* Condition. */
- condition = lttng_trigger_get_const_condition(trigger);
- LTTNG_ASSERT(condition);
- ret_code = lttng_condition_mi_serialize(
- trigger, condition, writer, error_query_callbacks);
- if (ret_code != LTTNG_OK) {
- goto end;
- }
-
- /* Action. */
- action = lttng_trigger_get_const_action(trigger);
- LTTNG_ASSERT(action);
- ret_code = lttng_action_mi_serialize(trigger, action, writer,
- error_query_callbacks, &action_path_indexes);
- if (ret_code != LTTNG_OK) {
- goto end;
- }
-
- if (error_query_callbacks && error_query_callbacks->trigger_cb) {
- struct lttng_error_query_results *results = NULL;
-
- ret_code = error_query_callbacks->trigger_cb(trigger, &results);
- if (ret_code != LTTNG_OK) {
- goto end;
- }
-
- ret_code = lttng_error_query_results_mi_serialize(
- results, writer);
- lttng_error_query_results_destroy(results);
- if (ret_code != LTTNG_OK) {
- goto end;
- }
- }
-
- /* Close trigger element. */
- ret = mi_lttng_writer_close_element(writer);
- if (ret) {
- goto mi_error;
- }
-
- ret_code = LTTNG_OK;
- goto end;
-
-mi_error:
- ret_code = LTTNG_ERR_MI_IO_FAIL;
-end:
- lttng_dynamic_array_reset(&action_path_indexes);
- return ret_code;
-}
-
-/* Used by qsort, which expects the semantics of strcmp(). */
-static int compare_triggers_by_name(const void *a, const void *b)
-{
- const struct lttng_trigger *trigger_a =
- *((const struct lttng_trigger **) a);
- const struct lttng_trigger *trigger_b =
- *((const struct lttng_trigger **) b);
- const char *name_a, *name_b;
- enum lttng_trigger_status trigger_status;
-
- /* Anonymous triggers are not reachable here. */
- trigger_status = lttng_trigger_get_name(trigger_a, &name_a);
- LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
-
- trigger_status = lttng_trigger_get_name(trigger_b, &name_b);
- LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
-
- return strcmp(name_a, name_b);
-}
-
-enum lttng_error_code lttng_triggers_mi_serialize(const struct lttng_triggers *triggers,
- struct mi_writer *writer,
- const struct mi_lttng_error_query_callbacks
- *error_query_callbacks)
-{
- int ret;
- enum lttng_error_code ret_code;
- enum lttng_trigger_status status;
- unsigned int count, i;
- struct lttng_dynamic_pointer_array sorted_triggers;
-
- LTTNG_ASSERT(triggers);
- LTTNG_ASSERT(writer);
-
- /*
- * Sort trigger by name to ensure an order at the MI level and ignore
- * any anonymous trigger present.
- */
- lttng_dynamic_pointer_array_init(&sorted_triggers, NULL);
-
- status = lttng_triggers_get_count(triggers, &count);
- LTTNG_ASSERT(status == LTTNG_TRIGGER_STATUS_OK);
-
- for (i = 0; i < count; i++) {
- int add_ret;
- const char *unused_name;
- const struct lttng_trigger *trigger =
- lttng_triggers_get_at_index(triggers, i);
-
- status = lttng_trigger_get_name(trigger, &unused_name);
- switch (status) {
- case LTTNG_TRIGGER_STATUS_OK:
- break;
- case LTTNG_TRIGGER_STATUS_UNSET:
- /* Don't list anonymous triggers. */
- continue;
- default:
- abort();
- }
-
- add_ret = lttng_dynamic_pointer_array_add_pointer(
- &sorted_triggers, (void *) trigger);
-
- if (add_ret) {
- ERR("Failed to lttng_trigger to sorting array.");
- ret_code = LTTNG_ERR_NOMEM;
- goto error;
- }
- }
-
- qsort(sorted_triggers.array.buffer.data, count,
- sizeof(struct lttng_trigger *),
- compare_triggers_by_name);
-
- /* Open triggers element. */
- ret = mi_lttng_writer_open_element(writer, mi_lttng_element_triggers);
- if (ret) {
- ret_code = LTTNG_ERR_MI_IO_FAIL;
- goto error;
- }
-
- for (i = 0; i < lttng_dynamic_pointer_array_get_count(&sorted_triggers); i++) {
- const struct lttng_trigger *trigger =
- (const struct lttng_trigger *)
- lttng_dynamic_pointer_array_get_pointer(
- &sorted_triggers, i);
-
- lttng_trigger_mi_serialize(trigger, writer, error_query_callbacks);
- }
-
- /* Close triggers element. */
- ret = mi_lttng_writer_close_element(writer);
- if (ret) {
- ret_code = LTTNG_ERR_MI_IO_FAIL;
- goto error;
- }
-
- ret_code = LTTNG_OK;
-
-error:
- lttng_dynamic_pointer_array_reset(&sorted_triggers);
- return ret_code;
-}
projects / lttng-tools.git / blobdiff