#include <common/payload.h>
#include <common/payload-view.h>
#include <common/error.h>
+#include <common/dynamic-array.h>
#include <common/optional.h>
#include <assert.h>
#include <inttypes.h>
LTTNG_HIDDEN
ssize_t lttng_trigger_create_from_payload(
struct lttng_payload_view *src_view,
- struct lttng_trigger **trigger)
+ struct lttng_trigger **_trigger)
{
ssize_t ret, offset = 0, condition_size, action_size, name_size = 0;
struct lttng_condition *condition = NULL;
.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 (!src_view || !trigger) {
+ 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)) src_view->buffer.data;
+ trigger_comm = (typeof(trigger_comm)) trigger_comm_view.buffer.data;
/* Set the trigger's creds. */
if (trigger_comm->uid > (uint64_t) ((uid_t) -1)) {
/* Name. */
const struct lttng_payload_view name_view =
lttng_payload_view_from_view(
- src_view, offset, trigger_comm->name_length);
+ 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,
goto error;
}
- *trigger = lttng_trigger_create(condition, action);
- if (!*trigger) {
+ trigger = lttng_trigger_create(condition, action);
+ if (!trigger) {
ret = -1;
goto error;
}
- lttng_trigger_set_credentials(*trigger, &creds);
+ lttng_trigger_set_credentials(trigger, &creds);
/*
* The trigger object owns references to the action and condition
if (name) {
const enum lttng_trigger_status status =
- lttng_trigger_set_name(*trigger, name);
+ lttng_trigger_set_name(trigger, name);
if (status != LTTNG_TRIGGER_STATUS_OK) {
ret = -1;
ret = offset;
error:
- lttng_condition_destroy(condition);
- lttng_action_destroy(action);
+ lttng_condition_put(condition);
+ lttng_action_put(action);
end:
+ if (ret >= 0) {
+ *_trigger = trigger;
+ } else {
+ lttng_trigger_put(trigger);
+ }
+
return ret;
}
* for the detailed format.
*/
LTTNG_HIDDEN
-int lttng_trigger_serialize(struct lttng_trigger *trigger,
+int lttng_trigger_serialize(const struct lttng_trigger *trigger,
struct lttng_payload *payload)
{
int ret;
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)
projects / lttng-tools.git / blobdiff