static void _lttng_channel_destroy(struct lttng_kernel_channel_buffer *chan);
static int _lttng_event_unregister(struct lttng_kernel_event_common *event);
static
-int _lttng_event_metadata_statedump(struct lttng_kernel_session *session,
- struct lttng_kernel_channel_buffer *chan,
- struct lttng_kernel_event_recorder *event);
+int _lttng_event_recorder_metadata_statedump(struct lttng_kernel_event_common *event);
static
int _lttng_session_metadata_statedump(struct lttng_kernel_session *session);
static
wake_up_interruptible(&stream->read_wait);
}
+static
+bool lttng_kernel_event_id_available(struct lttng_event_enabler_common *event_enabler)
+{
+ struct lttng_kernel_abi_event *event_param = &event_enabler->event_param;
+ enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
+
+ switch (event_enabler->enabler_type) {
+ case LTTNG_EVENT_ENABLER_TYPE_RECORDER:
+ {
+ struct lttng_event_recorder_enabler *event_recorder_enabler =
+ container_of(event_enabler, struct lttng_event_recorder_enabler, parent);
+ struct lttng_kernel_channel_buffer *chan = event_recorder_enabler->chan;
+
+ switch (itype) {
+ case LTTNG_KERNEL_ABI_TRACEPOINT:
+ lttng_fallthrough;
+ case LTTNG_KERNEL_ABI_KPROBE:
+ lttng_fallthrough;
+ case LTTNG_KERNEL_ABI_SYSCALL:
+ lttng_fallthrough;
+ case LTTNG_KERNEL_ABI_UPROBE:
+ if (chan->priv->free_event_id == -1U)
+ return false;
+ return true;
+ case LTTNG_KERNEL_ABI_KRETPROBE:
+ /* kretprobes require 2 event IDs. */
+ if (chan->priv->free_event_id >= -2U)
+ return false;
+ return true;
+ default:
+ WARN_ON_ONCE(1);
+ return false;
+ }
+ }
+ case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER:
+ return true;
+ default:
+ WARN_ON_ONCE(1);
+ return false;
+ }
+}
+
static
struct lttng_kernel_event_common *lttng_kernel_event_alloc(struct lttng_event_enabler_common *event_enabler)
{
}
}
+static
+int lttng_kernel_event_notifier_clear_error_counter(struct lttng_kernel_event_common *event)
+{
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
+ return 0;
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ {
+ struct lttng_kernel_event_notifier *event_notifier =
+ container_of(event, struct lttng_kernel_event_notifier, parent);
+ struct lttng_counter *error_counter;
+ struct lttng_event_notifier_group *event_notifier_group = event_notifier->priv->group;
+ size_t dimension_index[1];
+ int ret;
+
+ /*
+ * Clear the error counter bucket. The sessiond keeps track of which
+ * bucket is currently in use. We trust it. The session lock
+ * synchronizes against concurrent creation of the error
+ * counter.
+ */
+ error_counter = event_notifier_group->error_counter;
+ if (!error_counter)
+ return 0;
+ /*
+ * Check that the index is within the boundary of the counter.
+ */
+ if (event_notifier->priv->error_counter_index >= event_notifier_group->error_counter_len) {
+ printk(KERN_INFO "LTTng: event_notifier: Error counter index out-of-bound: counter-len=%zu, index=%llu\n",
+ event_notifier_group->error_counter_len, event_notifier->priv->error_counter_index);
+ return -EINVAL;
+ }
+
+ dimension_index[0] = event_notifier->priv->error_counter_index;
+ ret = error_counter->ops->counter_clear(error_counter->counter, dimension_index);
+ if (ret) {
+ printk(KERN_INFO "LTTng: event_notifier: Unable to clear error counter bucket %llu\n",
+ event_notifier->priv->error_counter_index);
+ return -EINVAL;
+ }
+ return 0;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
/*
* Supports event creation while tracing session is active.
* Needs to be called with sessions mutex held.
const struct lttng_kernel_event_desc *event_desc)
{
struct lttng_event_ht *events_ht = lttng_get_event_ht_from_enabler(&event_enabler->parent);
- struct lttng_kernel_channel_buffer *chan = event_enabler->chan;
+ struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(&event_enabler->parent);
struct lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param;
enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
struct lttng_kernel_event_common_private *event_priv;
struct hlist_head *head;
int ret;
- if (chan->priv->free_event_id == -1U) {
+ if (!lttng_kernel_event_id_available(&event_enabler->parent)) {
ret = -EMFILE;
goto full;
}
case LTTNG_KERNEL_ABI_KRETPROBE:
{
struct lttng_kernel_event_common *event_return;
- struct lttng_kernel_event_recorder *event_recorder_return;
/* kretprobe defines 2 events */
/*
ret = -ENOMEM;
goto alloc_error;
}
- event_recorder_return = container_of(event_return, struct lttng_kernel_event_recorder, parent);
event_return->enabled = 0;
event_return->priv->registered = 1;
WARN_ON_ONCE(!ret);
ret = try_module_get(event_return->priv->desc->owner);
WARN_ON_ONCE(!ret);
- ret = _lttng_event_metadata_statedump(chan->parent.session, chan, event_recorder_return);
+ ret = _lttng_event_recorder_metadata_statedump(event_return);
WARN_ON_ONCE(ret > 0);
if (ret) {
lttng_kernel_event_free(event_return);
module_put(event->priv->desc->owner);
goto statedump_error;
}
- list_add(&event_return->priv->node, &chan->parent.session->priv->events);
+ list_add(&event_return->priv->node, event_list_head);
break;
}
ret = -EINVAL;
goto register_error;
}
- ret = _lttng_event_metadata_statedump(chan->parent.session, chan, event_recorder);
+ ret = _lttng_event_recorder_metadata_statedump(event);
WARN_ON_ONCE(ret > 0);
if (ret) {
goto statedump_error;
}
hlist_add_head(&event->priv->hlist_node, head);
- list_add(&event->priv->node, &chan->parent.session->priv->events);
+ list_add(&event->priv->node, event_list_head);
return event_recorder;
statedump_error:
const struct lttng_kernel_event_desc *event_desc)
{
struct lttng_event_ht *events_ht = lttng_get_event_ht_from_enabler(&event_enabler->parent);
- struct lttng_event_notifier_group *event_notifier_group = event_enabler->group;
+ struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(&event_enabler->parent);
struct lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param;
enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
struct lttng_kernel_event_common_private *event_priv;
struct lttng_kernel_event_common *event;
struct lttng_kernel_event_notifier *event_notifier;
- struct lttng_counter *error_counter;
const char *event_name;
struct hlist_head *head;
int ret;
goto register_error;
}
- list_add(&event->priv->node, &event_notifier_group->event_notifiers_head);
- hlist_add_head(&event->priv->hlist_node, head);
-
- /*
- * Clear the error counter bucket. The sessiond keeps track of which
- * bucket is currently in use. We trust it. The session lock
- * synchronizes against concurrent creation of the error
- * counter.
- */
- error_counter = event_notifier_group->error_counter;
- if (error_counter) {
- size_t dimension_index[1];
-
- /*
- * Check that the index is within the boundary of the counter.
- */
- if (event_notifier->priv->error_counter_index >= event_notifier_group->error_counter_len) {
- printk(KERN_INFO "LTTng: event_notifier: Error counter index out-of-bound: counter-len=%zu, index=%llu\n",
- event_notifier_group->error_counter_len, event_notifier->priv->error_counter_index);
- ret = -EINVAL;
- goto register_error;
- }
+ ret = lttng_kernel_event_notifier_clear_error_counter(event);
+ if (ret)
+ goto register_error;
- dimension_index[0] = event_notifier->priv->error_counter_index;
- ret = error_counter->ops->counter_clear(error_counter->counter, dimension_index);
- if (ret) {
- printk(KERN_INFO "LTTng: event_notifier: Unable to clear error counter bucket %llu\n",
- event_notifier->priv->error_counter_index);
- goto register_error;
- }
- }
+ list_add(&event->priv->node, event_list_head);
+ hlist_add_head(&event->priv->hlist_node, head);
return event_notifier;
* transaction.
*/
static
-int _lttng_event_metadata_statedump(struct lttng_kernel_session *session,
- struct lttng_kernel_channel_buffer *chan,
- struct lttng_kernel_event_recorder *event_recorder)
+int _lttng_event_recorder_metadata_statedump(struct lttng_kernel_event_common *event)
{
+ struct lttng_kernel_event_recorder *event_recorder;
+ struct lttng_kernel_channel_buffer *chan;
+ struct lttng_kernel_session *session;
int ret = 0;
+ if (event->type != LTTNG_KERNEL_EVENT_TYPE_RECORDER)
+ return 0;
+ event_recorder = container_of(event, struct lttng_kernel_event_recorder, parent);
+ chan = event_recorder->chan;
+ session = chan->parent.session;
+
if (event_recorder->priv->metadata_dumped || !LTTNG_READ_ONCE(session->active))
return 0;
if (chan->priv->channel_type == METADATA_CHANNEL)
}
list_for_each_entry(event_recorder_priv, &session->priv->events, parent.node) {
- ret = _lttng_event_metadata_statedump(session, event_recorder_priv->pub->chan,
- event_recorder_priv->pub);
+ ret = _lttng_event_recorder_metadata_statedump(&event_recorder_priv->pub->parent);
if (ret)
goto end;
}
projects / lttng-modules.git / blobdiff