static void _lttng_event_destroy(struct lttng_kernel_event_common *event);
static void _lttng_channel_destroy(struct lttng_kernel_channel_buffer *chan);
-static int _lttng_event_recorder_unregister(struct lttng_kernel_event_recorder *event);
-static int _lttng_event_notifier_unregister(struct lttng_kernel_event_notifier *event_notifier);
+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,
INIT_LIST_HEAD(&event_notifier_group->enablers_head);
INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head);
- for (i = 0; i < LTTNG_EVENT_NOTIFIER_HT_SIZE; i++)
- INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]);
+ for (i = 0; i < LTTNG_EVENT_HT_SIZE; i++)
+ INIT_HLIST_HEAD(&event_notifier_group->events_ht.table[i]);
list_add(&event_notifier_group->node, &event_notifier_groups);
WARN_ON(ret);
}
list_for_each_entry(event_recorder_priv, &session->priv->events, node) {
- ret = _lttng_event_recorder_unregister(event_recorder_priv->pub);
+ ret = _lttng_event_unregister(&event_recorder_priv->pub->parent);
WARN_ON(ret);
}
synchronize_trace(); /* Wait for in-flight events to complete */
list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv,
&event_notifier_group->event_notifiers_head, node) {
- ret = _lttng_event_notifier_unregister(event_notifier_priv->pub);
+ ret = _lttng_event_unregister(&event_notifier_priv->pub->parent);
WARN_ON(ret);
}
return ERR_PTR(ret);
}
-struct lttng_kernel_event_notifier *_lttng_event_notifier_create(
- const struct lttng_kernel_event_desc *event_desc,
- uint64_t token, uint64_t error_counter_index,
- struct lttng_event_notifier_group *event_notifier_group,
- struct lttng_kernel_abi_event_notifier *event_notifier_param,
- enum lttng_kernel_abi_instrumentation itype)
+struct lttng_kernel_event_notifier *_lttng_event_notifier_create(struct lttng_event_notifier_enabler *event_enabler,
+ const struct lttng_kernel_event_desc *event_desc)
{
+ struct lttng_event_notifier_group *event_notifier_group = event_enabler->group;
+ struct lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param;
+ uint64_t token = event_enabler->parent.user_token;
+ enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
struct lttng_kernel_event_notifier *event_notifier;
struct lttng_kernel_event_notifier_private *event_notifier_priv;
struct lttng_counter *error_counter;
case LTTNG_KERNEL_ABI_UPROBE:
lttng_fallthrough;
case LTTNG_KERNEL_ABI_SYSCALL:
- event_name = event_notifier_param->event.name;
+ event_name = event_param->name;
break;
case LTTNG_KERNEL_ABI_KRETPROBE:
goto type_error;
}
- head = utils_borrow_hash_table_bucket(event_notifier_group->event_notifiers_ht.table,
- LTTNG_EVENT_NOTIFIER_HT_SIZE, event_name);
+ head = utils_borrow_hash_table_bucket(event_notifier_group->events_ht.table,
+ LTTNG_EVENT_HT_SIZE, event_name);
lttng_hlist_for_each_entry(event_notifier_priv, head, hlist) {
WARN_ON_ONCE(!event_notifier_priv->parent.desc);
if (!strncmp(event_notifier_priv->parent.desc->event_name, event_name,
event_notifier->parent.type = LTTNG_KERNEL_EVENT_TYPE_NOTIFIER;
event_notifier->priv->group = event_notifier_group;
- event_notifier->priv->parent.user_token = token;
- event_notifier->priv->error_counter_index = error_counter_index;
+ event_notifier->priv->parent.user_token = event_enabler->parent.user_token;
+ event_notifier->priv->error_counter_index = event_enabler->error_counter_index;
event_notifier->priv->num_captures = 0;
event_notifier->priv->parent.instrumentation = itype;
event_notifier->notification_send = lttng_event_notifier_notification_send;
* registration.
*/
smp_wmb();
- ret = lttng_kprobes_register_event(event_notifier_param->event.u.kprobe.symbol_name,
- event_notifier_param->event.u.kprobe.symbol_name,
- event_notifier_param->event.u.kprobe.offset,
- event_notifier_param->event.u.kprobe.addr,
+ ret = lttng_kprobes_register_event(event_param->u.kprobe.symbol_name,
+ event_param->u.kprobe.symbol_name,
+ event_param->u.kprobe.offset,
+ event_param->u.kprobe.addr,
&event_notifier->parent);
if (ret) {
ret = -EINVAL;
event_notifier->parent.enabled = 0;
event_notifier->priv->parent.registered = 0;
event_notifier->priv->parent.desc = event_desc;
- switch (event_notifier_param->event.u.syscall.entryexit) {
+ switch (event_param->u.syscall.entryexit) {
case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT:
ret = -EINVAL;
goto register_error;
event_notifier->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_EXIT;
break;
}
- switch (event_notifier_param->event.u.syscall.abi) {
+ switch (event_param->u.syscall.abi) {
case LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL:
ret = -EINVAL;
goto register_error;
*/
smp_wmb();
- ret = lttng_uprobes_register_event(event_notifier_param->event.name,
- event_notifier_param->event.u.uprobe.fd,
+ ret = lttng_uprobes_register_event(event_param->name,
+ event_param->u.uprobe.fd,
&event_notifier->parent);
if (ret)
goto register_error;
return event;
}
-struct lttng_kernel_event_notifier *lttng_event_notifier_create(
- const struct lttng_kernel_event_desc *event_desc,
- uint64_t id, uint64_t error_counter_index,
- struct lttng_event_notifier_group *event_notifier_group,
- struct lttng_kernel_abi_event_notifier *event_notifier_param,
- enum lttng_kernel_abi_instrumentation itype)
+struct lttng_kernel_event_notifier *lttng_event_notifier_create(struct lttng_event_notifier_enabler *event_enabler,
+ const struct lttng_kernel_event_desc *event_desc)
{
struct lttng_kernel_event_notifier *event_notifier;
mutex_lock(&sessions_mutex);
- event_notifier = _lttng_event_notifier_create(event_desc, id,
- error_counter_index, event_notifier_group,
- event_notifier_param, itype);
+ event_notifier = _lttng_event_notifier_create(event_enabler, event_desc);
mutex_unlock(&sessions_mutex);
return event_notifier;
}
/* Only used for tracepoints for now. */
static
-void register_event_recorder(struct lttng_kernel_event_recorder *event_recorder)
+void register_event(struct lttng_kernel_event_common *event)
{
const struct lttng_kernel_event_desc *desc;
int ret = -EINVAL;
- if (event_recorder->priv->parent.registered)
+ if (event->priv->registered)
return;
- desc = event_recorder->priv->parent.desc;
- switch (event_recorder->priv->parent.instrumentation) {
+ desc = event->priv->desc;
+ switch (event->priv->instrumentation) {
case LTTNG_KERNEL_ABI_TRACEPOINT:
ret = lttng_wrapper_tracepoint_probe_register(desc->event_kname,
desc->tp_class->probe_callback,
- &event_recorder->parent);
+ event);
break;
case LTTNG_KERNEL_ABI_SYSCALL:
- ret = lttng_syscall_filter_enable_event(&event_recorder->parent);
+ ret = lttng_syscall_filter_enable_event(event);
break;
case LTTNG_KERNEL_ABI_KPROBE:
lttng_fallthrough;
case LTTNG_KERNEL_ABI_UPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_KRETPROBE:
ret = 0;
break;
+ case LTTNG_KERNEL_ABI_KRETPROBE:
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
+ ret = 0;
+ break;
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ WARN_ON_ONCE(1);
+ break;
+ }
+ break;
+
case LTTNG_KERNEL_ABI_FUNCTION:
lttng_fallthrough;
case LTTNG_KERNEL_ABI_NOOP:
WARN_ON_ONCE(1);
}
if (!ret)
- event_recorder->priv->parent.registered = 1;
+ event->priv->registered = 1;
}
-/*
- * Only used internally at session destruction.
- */
-int _lttng_event_recorder_unregister(struct lttng_kernel_event_recorder *event_recorder)
+int _lttng_event_unregister(struct lttng_kernel_event_common *event)
{
- struct lttng_kernel_event_common_private *event_priv = &event_recorder->priv->parent;
+ struct lttng_kernel_event_common_private *event_priv = event->priv;
const struct lttng_kernel_event_desc *desc;
int ret = -EINVAL;
case LTTNG_KERNEL_ABI_TRACEPOINT:
ret = lttng_wrapper_tracepoint_probe_unregister(event_priv->desc->event_kname,
event_priv->desc->tp_class->probe_callback,
- &event_recorder->parent);
+ event);
break;
case LTTNG_KERNEL_ABI_KPROBE:
- lttng_kprobes_unregister_event(&event_recorder->parent);
+ lttng_kprobes_unregister_event(event);
ret = 0;
break;
case LTTNG_KERNEL_ABI_KRETPROBE:
- lttng_kretprobes_unregister(&event_recorder->parent);
- ret = 0;
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
+ lttng_kretprobes_unregister(event);
+ ret = 0;
+ break;
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ WARN_ON_ONCE(1);
+ break;
+ }
break;
case LTTNG_KERNEL_ABI_SYSCALL:
- ret = lttng_syscall_filter_disable_event(&event_recorder->parent);
+ ret = lttng_syscall_filter_disable_event(event);
break;
case LTTNG_KERNEL_ABI_NOOP:
- ret = 0;
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
+ ret = 0;
+ break;
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ WARN_ON_ONCE(1);
+ break;
+ }
break;
case LTTNG_KERNEL_ABI_UPROBE:
- lttng_uprobes_unregister_event(&event_recorder->parent);
+ lttng_uprobes_unregister_event(event);
ret = 0;
break;
return ret;
}
-/* Only used for tracepoints for now. */
-static
-void register_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
-{
- const struct lttng_kernel_event_desc *desc;
- int ret = -EINVAL;
-
- if (event_notifier->priv->parent.registered)
- return;
-
- desc = event_notifier->priv->parent.desc;
- switch (event_notifier->priv->parent.instrumentation) {
- case LTTNG_KERNEL_ABI_TRACEPOINT:
- ret = lttng_wrapper_tracepoint_probe_register(desc->event_kname,
- desc->tp_class->probe_callback,
- &event_notifier->parent);
- break;
-
- case LTTNG_KERNEL_ABI_SYSCALL:
- ret = lttng_syscall_filter_enable_event(&event_notifier->parent);
- break;
-
- case LTTNG_KERNEL_ABI_KPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_UPROBE:
- ret = 0;
- break;
-
- case LTTNG_KERNEL_ABI_KRETPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_FUNCTION:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_NOOP:
- lttng_fallthrough;
- default:
- WARN_ON_ONCE(1);
- }
- if (!ret)
- event_notifier->priv->parent.registered = 1;
-}
-
-static
-int _lttng_event_notifier_unregister(
- struct lttng_kernel_event_notifier *event_notifier)
-{
- const struct lttng_kernel_event_desc *desc;
- int ret = -EINVAL;
-
- if (!event_notifier->priv->parent.registered)
- return 0;
-
- desc = event_notifier->priv->parent.desc;
- switch (event_notifier->priv->parent.instrumentation) {
- case LTTNG_KERNEL_ABI_TRACEPOINT:
- ret = lttng_wrapper_tracepoint_probe_unregister(event_notifier->priv->parent.desc->event_kname,
- event_notifier->priv->parent.desc->tp_class->probe_callback,
- &event_notifier->parent);
- break;
-
- case LTTNG_KERNEL_ABI_KPROBE:
- lttng_kprobes_unregister_event(&event_notifier->parent);
- ret = 0;
- break;
-
- case LTTNG_KERNEL_ABI_UPROBE:
- lttng_uprobes_unregister_event(&event_notifier->parent);
- ret = 0;
- break;
-
- case LTTNG_KERNEL_ABI_SYSCALL:
- ret = lttng_syscall_filter_disable_event(&event_notifier->parent);
- break;
-
- case LTTNG_KERNEL_ABI_KRETPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_FUNCTION:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_NOOP:
- lttng_fallthrough;
- default:
- WARN_ON_ONCE(1);
- }
- if (!ret)
- event_notifier->priv->parent.registered = 0;
- return ret;
-}
-
/*
* Only used internally at session destruction.
*/
* Check if already created.
*/
head = utils_borrow_hash_table_bucket(
- event_notifier_group->event_notifiers_ht.table,
- LTTNG_EVENT_NOTIFIER_HT_SIZE, desc->event_name);
+ event_notifier_group->events_ht.table,
+ LTTNG_EVENT_HT_SIZE, desc->event_name);
lttng_hlist_for_each_entry(event_notifier_priv, head, hlist) {
if (event_notifier_priv->parent.desc == desc
&& event_notifier_priv->parent.user_token == event_notifier_enabler->parent.user_token)
/*
* We need to create a event_notifier for this event probe.
*/
- event_notifier = _lttng_event_notifier_create(desc,
- event_notifier_enabler->parent.user_token,
- event_notifier_enabler->error_counter_index,
- event_notifier_group, NULL,
- LTTNG_KERNEL_ABI_TRACEPOINT);
+ event_notifier = _lttng_event_notifier_create(event_notifier_enabler, desc);
if (IS_ERR(event_notifier)) {
printk(KERN_INFO "Unable to create event_notifier %s\n",
probe_desc->event_desc[i]->event_name);
}
static
-void lttng_create_syscall_event_if_missing(struct lttng_event_recorder_enabler *event_enabler)
+void lttng_create_syscall_event_if_missing(struct lttng_event_enabler_common *event_enabler)
{
int ret;
- ret = lttng_syscalls_register_event(&event_enabler->parent);
- WARN_ON_ONCE(ret);
-}
-
-static
-void lttng_create_syscall_event_notifier_if_missing(struct lttng_event_notifier_enabler *event_notifier_enabler)
-{
- int ret;
-
- ret = lttng_syscalls_register_event(&event_notifier_enabler->parent);
- WARN_ON_ONCE(ret);
- ret = lttng_syscalls_create_matching_event_notifiers(event_notifier_enabler);
+ ret = lttng_syscalls_register_event(event_enabler);
WARN_ON_ONCE(ret);
}
break;
case LTTNG_KERNEL_ABI_SYSCALL:
- lttng_create_syscall_event_if_missing(event_enabler);
+ lttng_create_syscall_event_if_missing(&event_enabler->parent);
break;
default:
break;
case LTTNG_KERNEL_ABI_SYSCALL:
- lttng_create_syscall_event_notifier_if_missing(event_notifier_enabler);
+ lttng_create_syscall_event_if_missing(&event_notifier_enabler->parent);
break;
default:
struct lttng_event_notifier_enabler *event_notifier_enabler =
container_of(event_enabler, struct lttng_event_notifier_enabler, parent);
- list_del(&event_notifier_enabler->node);
lttng_enabler_destroy(event_enabler);
+ if (event_notifier_enabler->published)
+ list_del(&event_notifier_enabler->node);
kfree(event_notifier_enabler);
break;
}
}
struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
- struct lttng_event_notifier_group *event_notifier_group,
enum lttng_enabler_format_type format_type,
- struct lttng_kernel_abi_event_notifier *event_notifier_param)
+ struct lttng_kernel_abi_event_notifier *event_notifier_param,
+ struct lttng_event_notifier_group *event_notifier_group)
{
struct lttng_event_notifier_enabler *event_notifier_enabler;
event_notifier_enabler->parent.enabled = 0;
event_notifier_enabler->parent.user_token = event_notifier_param->event.token;
event_notifier_enabler->group = event_notifier_group;
+ return event_notifier_enabler;
+}
+void lttng_event_notifier_enabler_group_add(struct lttng_event_notifier_group *event_notifier_group,
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
mutex_lock(&sessions_mutex);
list_add(&event_notifier_enabler->node, &event_notifier_enabler->group->enablers_head);
+ event_notifier_enabler->published = true;
lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group);
-
mutex_unlock(&sessions_mutex);
-
- return event_notifier_enabler;
}
int lttng_event_notifier_enabler_enable(
* state.
*/
if (enabled) {
- register_event_recorder(event_recorder);
+ register_event(&event_recorder->parent);
} else {
- _lttng_event_recorder_unregister(event_recorder);
+ _lttng_event_unregister(&event_recorder->parent);
}
/* Check if has enablers without bytecode enabled */
*/
if (enabled) {
if (!event_notifier_priv->parent.registered)
- register_event_notifier(event_notifier);
+ register_event(&event_notifier->parent);
} else {
if (event_notifier_priv->parent.registered)
- _lttng_event_notifier_unregister(event_notifier);
+ _lttng_event_unregister(&event_notifier->parent);
}
/* Check if has enablers without bytecode enabled */
projects / lttng-modules.git / blobdiff