#include <common/error.h>
#include <common/optional.h>
#include <assert.h>
+#include <inttypes.h>
LTTNG_HIDDEN
bool lttng_trigger_validate(struct lttng_trigger *trigger)
goto end;
}
+ if (!trigger->creds.uid.is_set) {
+ valid = false;
+ goto end;
+ }
+
valid = lttng_condition_validate(trigger->condition) &&
lttng_action_validate(trigger->action);
end:
goto end;
}
+ urcu_ref_init(&trigger->ref);
+
+ 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->condition;
}
+
+/*
+ * 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->action;
}
-void lttng_trigger_destroy(struct lttng_trigger *trigger)
+static void trigger_destroy_ref(struct urcu_ref *ref)
{
- if (!trigger) {
- return;
- }
+ 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);
+}
+
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;
+ 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,
+ };
if (!src_view || !trigger) {
ret = -1;
/* lttng_trigger_comm header */
trigger_comm = (typeof(trigger_comm)) src_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);
+
+ 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 =
offset += action_size;
/* Unexpected size of inner-elements; the buffer is corrupted. */
- if ((ssize_t) trigger_comm->length != condition_size + action_size) {
+ if ((ssize_t) trigger_comm->length != condition_size + action_size + name_size) {
ret = -1;
goto error;
}
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;
-end:
- return ret;
+
error:
lttng_condition_destroy(condition);
lttng_action_destroy(action);
+end:
return ret;
}
struct lttng_payload *payload)
{
int ret;
- size_t header_offset, size_before_payload;
+ 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;
header_offset = payload->buffer.size;
ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm,
}
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;
return ret;
}
+LTTNG_HIDDEN
+bool lttng_trigger_is_equal(
+ const struct lttng_trigger *a, const struct lttng_trigger *b)
+{
+ /*
+ * 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
+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);
+}
+
LTTNG_HIDDEN
const struct lttng_credentials *lttng_trigger_get_credentials(
const struct lttng_trigger *trigger)
{
- return LTTNG_OPTIONAL_GET_PTR(trigger->creds);
+ return &trigger->creds;
}
LTTNG_HIDDEN
-void lttng_trigger_set_credentials(
- struct lttng_trigger *trigger,
+void lttng_trigger_set_credentials(struct lttng_trigger *trigger,
const struct lttng_credentials *creds)
{
assert(creds);
- LTTNG_OPTIONAL_SET(&trigger->creds, *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;
}
projects / lttng-tools.git / blobdiff