X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Flttng-events.c;h=6d3e3f1a2c64089e4a5761e13088da07e747e49a;hb=09710b830767f6cc69fc68ea7e1903a1122d1045;hp=6676d5f715d873e7490a6422fbc6809d574ebda9;hpb=ef784b4d0f4e732a570f19e9ac365028817a6c2d;p=lttng-modules.git diff --git a/src/lttng-events.c b/src/lttng-events.c index 6676d5f7..6d3e3f1a 100644 --- a/src/lttng-events.c +++ b/src/lttng-events.c @@ -28,6 +28,7 @@ #include #include +#include #include #include /* for wrapper_vmalloc_sync_mappings() */ #include @@ -58,41 +59,41 @@ static LIST_HEAD(lttng_counter_transport_list); * Protect the sessions and metadata caches. */ static DEFINE_MUTEX(sessions_mutex); -static struct kmem_cache *event_cache; +static struct kmem_cache *event_recorder_cache; +static struct kmem_cache *event_recorder_private_cache; static struct kmem_cache *event_notifier_cache; +static struct kmem_cache *event_notifier_private_cache; -static void lttng_session_lazy_sync_event_enablers(struct lttng_session *session); -static void lttng_session_sync_event_enablers(struct lttng_session *session); -static void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler); -static void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler); +static void lttng_session_lazy_sync_event_enablers(struct lttng_kernel_session *session); +static void lttng_session_sync_event_enablers(struct lttng_kernel_session *session); static void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group); +static void lttng_event_enabler_sync(struct lttng_event_enabler_common *event_enabler); -static void _lttng_event_destroy(struct lttng_event *event); -static void _lttng_event_notifier_destroy(struct lttng_event_notifier *event_notifier); -static void _lttng_channel_destroy(struct lttng_channel *chan); -static int _lttng_event_unregister(struct lttng_event *event); -static int _lttng_event_notifier_unregister(struct lttng_event_notifier *event_notifier); +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_unregister(struct lttng_kernel_event_common *event); static -int _lttng_event_metadata_statedump(struct lttng_session *session, - struct lttng_channel *chan, - struct lttng_event *event); +int _lttng_event_metadata_statedump(struct lttng_kernel_session *session, + struct lttng_kernel_channel_buffer *chan, + struct lttng_kernel_event_recorder *event); static -int _lttng_session_metadata_statedump(struct lttng_session *session); +int _lttng_session_metadata_statedump(struct lttng_kernel_session *session); static void _lttng_metadata_channel_hangup(struct lttng_metadata_stream *stream); static -int _lttng_type_statedump(struct lttng_session *session, +int _lttng_type_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_type_common *type, enum lttng_kernel_string_encoding parent_encoding, size_t nesting); static -int _lttng_field_statedump(struct lttng_session *session, +int _lttng_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, - size_t nesting); + size_t nesting, const char **prev_field_name_p); void synchronize_trace(void) { -#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,1,0)) +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,1,0) || \ + LTTNG_RHEL_KERNEL_RANGE(4,18,0,193,0,0, 4,19,0,0,0,0)) synchronize_rcu(); #else synchronize_sched(); @@ -135,64 +136,83 @@ static struct lttng_transport *lttng_transport_find(const char *name) */ int lttng_session_active(void) { - struct lttng_session *iter; + struct lttng_kernel_session_private *iter; list_for_each_entry(iter, &sessions, list) { - if (iter->active) + if (iter->pub->active) return 1; } return 0; } -struct lttng_session *lttng_session_create(void) +struct lttng_kernel_session *lttng_session_create(void) { - struct lttng_session *session; + struct lttng_kernel_session *session; + struct lttng_kernel_session_private *session_priv; struct lttng_metadata_cache *metadata_cache; int i; mutex_lock(&sessions_mutex); - session = lttng_kvzalloc(sizeof(struct lttng_session), GFP_KERNEL); + session = lttng_kvzalloc(sizeof(*session), GFP_KERNEL); if (!session) goto err; - INIT_LIST_HEAD(&session->chan); - INIT_LIST_HEAD(&session->events); - lttng_guid_gen(&session->uuid); + session_priv = lttng_kvzalloc(sizeof(*session_priv), GFP_KERNEL); + if (!session_priv) + goto err_free_session; + session->priv = session_priv; + session_priv->pub = session; + + INIT_LIST_HEAD(&session_priv->chan); + INIT_LIST_HEAD(&session_priv->events); + lttng_guid_gen(&session_priv->uuid); metadata_cache = kzalloc(sizeof(struct lttng_metadata_cache), GFP_KERNEL); if (!metadata_cache) - goto err_free_session; + goto err_free_session_private; metadata_cache->data = vzalloc(METADATA_CACHE_DEFAULT_SIZE); if (!metadata_cache->data) goto err_free_cache; metadata_cache->cache_alloc = METADATA_CACHE_DEFAULT_SIZE; kref_init(&metadata_cache->refcount); mutex_init(&metadata_cache->lock); - session->metadata_cache = metadata_cache; + session_priv->metadata_cache = metadata_cache; INIT_LIST_HEAD(&metadata_cache->metadata_stream); - memcpy(&metadata_cache->uuid, &session->uuid, + memcpy(&metadata_cache->uuid, &session_priv->uuid, sizeof(metadata_cache->uuid)); - INIT_LIST_HEAD(&session->enablers_head); + INIT_LIST_HEAD(&session_priv->enablers_head); for (i = 0; i < LTTNG_EVENT_HT_SIZE; i++) - INIT_HLIST_HEAD(&session->events_ht.table[i]); - list_add(&session->list, &sessions); - session->pid_tracker.session = session; - session->pid_tracker.tracker_type = TRACKER_PID; - session->vpid_tracker.session = session; - session->vpid_tracker.tracker_type = TRACKER_VPID; - session->uid_tracker.session = session; - session->uid_tracker.tracker_type = TRACKER_UID; - session->vuid_tracker.session = session; - session->vuid_tracker.tracker_type = TRACKER_VUID; - session->gid_tracker.session = session; - session->gid_tracker.tracker_type = TRACKER_GID; - session->vgid_tracker.session = session; - session->vgid_tracker.tracker_type = TRACKER_VGID; + INIT_HLIST_HEAD(&session_priv->events_ht.table[i]); + list_add(&session_priv->list, &sessions); + + if (lttng_id_tracker_init(&session->pid_tracker, session, TRACKER_PID)) + goto tracker_alloc_error; + if (lttng_id_tracker_init(&session->vpid_tracker, session, TRACKER_VPID)) + goto tracker_alloc_error; + if (lttng_id_tracker_init(&session->uid_tracker, session, TRACKER_UID)) + goto tracker_alloc_error; + if (lttng_id_tracker_init(&session->vuid_tracker, session, TRACKER_VUID)) + goto tracker_alloc_error; + if (lttng_id_tracker_init(&session->gid_tracker, session, TRACKER_GID)) + goto tracker_alloc_error; + if (lttng_id_tracker_init(&session->vgid_tracker, session, TRACKER_VGID)) + goto tracker_alloc_error; + mutex_unlock(&sessions_mutex); + return session; +tracker_alloc_error: + lttng_id_tracker_fini(&session->pid_tracker); + lttng_id_tracker_fini(&session->vpid_tracker); + lttng_id_tracker_fini(&session->uid_tracker); + lttng_id_tracker_fini(&session->vuid_tracker); + lttng_id_tracker_fini(&session->gid_tracker); + lttng_id_tracker_fini(&session->vgid_tracker); err_free_cache: kfree(metadata_cache); +err_free_session_private: + lttng_kvfree(session_priv); err_free_session: lttng_kvfree(session); err: @@ -290,7 +310,7 @@ struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) * notifications. */ event_notifier_group->ops = &transport->ops; - event_notifier_group->chan = transport->ops.channel_create( + event_notifier_group->chan = transport->ops.priv->channel_create( transport_name, event_notifier_group, NULL, subbuf_size, num_subbuf, switch_timer_interval, read_timer_interval); @@ -301,8 +321,8 @@ struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) 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); @@ -328,59 +348,59 @@ void metadata_cache_destroy(struct kref *kref) kfree(cache); } -void lttng_session_destroy(struct lttng_session *session) +void lttng_session_destroy(struct lttng_kernel_session *session) { - struct lttng_channel *chan, *tmpchan; - struct lttng_event *event, *tmpevent; + struct lttng_kernel_channel_buffer_private *chan_priv, *tmpchan_priv; + struct lttng_kernel_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; struct lttng_metadata_stream *metadata_stream; - struct lttng_event_enabler *event_enabler, *tmp_event_enabler; + struct lttng_event_enabler_common *event_enabler, *tmp_event_enabler; int ret; mutex_lock(&sessions_mutex); WRITE_ONCE(session->active, 0); - list_for_each_entry(chan, &session->chan, list) { - ret = lttng_syscalls_unregister_channel(chan); + list_for_each_entry(chan_priv, &session->priv->chan, node) { + ret = lttng_syscalls_unregister_syscall_table(&chan_priv->parent.syscall_table); WARN_ON(ret); } - list_for_each_entry(event, &session->events, list) { - ret = _lttng_event_unregister(event); + list_for_each_entry(event_recorder_priv, &session->priv->events, parent.node) { + 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(chan, &session->chan, list) { - ret = lttng_syscalls_destroy_event(chan); + list_for_each_entry(chan_priv, &session->priv->chan, node) { + ret = lttng_syscalls_destroy_syscall_table(&chan_priv->parent.syscall_table); WARN_ON(ret); } - list_for_each_entry_safe(event_enabler, tmp_event_enabler, - &session->enablers_head, node) + list_for_each_entry_safe(event_enabler, tmp_event_enabler, &session->priv->enablers_head, node) lttng_event_enabler_destroy(event_enabler); - list_for_each_entry_safe(event, tmpevent, &session->events, list) - _lttng_event_destroy(event); - list_for_each_entry_safe(chan, tmpchan, &session->chan, list) { - BUG_ON(chan->channel_type == METADATA_CHANNEL); - _lttng_channel_destroy(chan); - } - mutex_lock(&session->metadata_cache->lock); - list_for_each_entry(metadata_stream, &session->metadata_cache->metadata_stream, list) + list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, &session->priv->events, parent.node) + _lttng_event_destroy(&event_recorder_priv->pub->parent); + list_for_each_entry_safe(chan_priv, tmpchan_priv, &session->priv->chan, node) { + BUG_ON(chan_priv->channel_type == METADATA_CHANNEL); + _lttng_channel_destroy(chan_priv->pub); + } + mutex_lock(&session->priv->metadata_cache->lock); + list_for_each_entry(metadata_stream, &session->priv->metadata_cache->metadata_stream, list) _lttng_metadata_channel_hangup(metadata_stream); - mutex_unlock(&session->metadata_cache->lock); - lttng_id_tracker_destroy(&session->pid_tracker, false); - lttng_id_tracker_destroy(&session->vpid_tracker, false); - lttng_id_tracker_destroy(&session->uid_tracker, false); - lttng_id_tracker_destroy(&session->vuid_tracker, false); - lttng_id_tracker_destroy(&session->gid_tracker, false); - lttng_id_tracker_destroy(&session->vgid_tracker, false); - kref_put(&session->metadata_cache->refcount, metadata_cache_destroy); - list_del(&session->list); + mutex_unlock(&session->priv->metadata_cache->lock); + lttng_id_tracker_fini(&session->pid_tracker); + lttng_id_tracker_fini(&session->vpid_tracker); + lttng_id_tracker_fini(&session->uid_tracker); + lttng_id_tracker_fini(&session->vuid_tracker); + lttng_id_tracker_fini(&session->gid_tracker); + lttng_id_tracker_fini(&session->vgid_tracker); + kref_put(&session->priv->metadata_cache->refcount, metadata_cache_destroy); + list_del(&session->priv->list); mutex_unlock(&sessions_mutex); + lttng_kvfree(session->priv); lttng_kvfree(session); } void lttng_event_notifier_group_destroy( struct lttng_event_notifier_group *event_notifier_group) { - struct lttng_event_notifier_enabler *event_notifier_enabler, *tmp_event_notifier_enabler; - struct lttng_event_notifier *event_notifier, *tmpevent_notifier; + struct lttng_event_enabler_common *event_enabler, *tmp_event_enabler; + struct lttng_kernel_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; int ret; if (!event_notifier_group) @@ -388,12 +408,12 @@ void lttng_event_notifier_group_destroy( mutex_lock(&sessions_mutex); - ret = lttng_syscalls_unregister_event_notifier_group(event_notifier_group); + ret = lttng_syscalls_unregister_syscall_table(&event_notifier_group->syscall_table); WARN_ON(ret); - list_for_each_entry_safe(event_notifier, tmpevent_notifier, - &event_notifier_group->event_notifiers_head, list) { - ret = _lttng_event_notifier_unregister(event_notifier); + list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, + &event_notifier_group->event_notifiers_head, parent.node) { + ret = _lttng_event_unregister(&event_notifier_priv->pub->parent); WARN_ON(ret); } @@ -402,15 +422,16 @@ void lttng_event_notifier_group_destroy( irq_work_sync(&event_notifier_group->wakeup_pending); - kfree(event_notifier_group->sc_filter); + ret = lttng_syscalls_destroy_syscall_table(&event_notifier_group->syscall_table); + WARN_ON(ret); - list_for_each_entry_safe(event_notifier_enabler, tmp_event_notifier_enabler, + list_for_each_entry_safe(event_enabler, tmp_event_enabler, &event_notifier_group->enablers_head, node) - lttng_event_notifier_enabler_destroy(event_notifier_enabler); + lttng_event_enabler_destroy(event_enabler); - list_for_each_entry_safe(event_notifier, tmpevent_notifier, - &event_notifier_group->event_notifiers_head, list) - _lttng_event_notifier_destroy(event_notifier); + list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, + &event_notifier_group->event_notifiers_head, parent.node) + _lttng_event_destroy(&event_notifier_priv->pub->parent); if (event_notifier_group->error_counter) { struct lttng_counter *error_counter = event_notifier_group->error_counter; @@ -421,7 +442,7 @@ void lttng_event_notifier_group_destroy( event_notifier_group->error_counter = NULL; } - event_notifier_group->ops->channel_destroy(event_notifier_group->chan); + event_notifier_group->ops->priv->channel_destroy(event_notifier_group->chan); module_put(event_notifier_group->transport->owner); list_del(&event_notifier_group->node); @@ -429,7 +450,7 @@ void lttng_event_notifier_group_destroy( lttng_kvfree(event_notifier_group); } -int lttng_session_statedump(struct lttng_session *session) +int lttng_session_statedump(struct lttng_kernel_session *session) { int ret; @@ -439,10 +460,10 @@ int lttng_session_statedump(struct lttng_session *session) return ret; } -int lttng_session_enable(struct lttng_session *session) +int lttng_session_enable(struct lttng_kernel_session *session) { int ret = 0; - struct lttng_channel *chan; + struct lttng_kernel_channel_buffer_private *chan_priv; mutex_lock(&sessions_mutex); if (session->active) { @@ -451,7 +472,7 @@ int lttng_session_enable(struct lttng_session *session) } /* Set transient enabler state to "enabled" */ - session->tstate = 1; + session->priv->tstate = 1; /* We need to sync enablers with session before activation. */ lttng_session_sync_event_enablers(session); @@ -460,23 +481,23 @@ int lttng_session_enable(struct lttng_session *session) * Snapshot the number of events per channel to know the type of header * we need to use. */ - list_for_each_entry(chan, &session->chan, list) { - if (chan->header_type) - continue; /* don't change it if session stop/restart */ - if (chan->free_event_id < 31) - chan->header_type = 1; /* compact */ + list_for_each_entry(chan_priv, &session->priv->chan, node) { + if (chan_priv->header_type) + continue; /* don't change it if session stop/restart */ + if (chan_priv->free_event_id < 31) + chan_priv->header_type = 1; /* compact */ else - chan->header_type = 2; /* large */ + chan_priv->header_type = 2; /* large */ } /* Clear each stream's quiescent state. */ - list_for_each_entry(chan, &session->chan, list) { - if (chan->channel_type != METADATA_CHANNEL) - lib_ring_buffer_clear_quiescent_channel(chan->chan); + list_for_each_entry(chan_priv, &session->priv->chan, node) { + if (chan_priv->channel_type != METADATA_CHANNEL) + lib_ring_buffer_clear_quiescent_channel(chan_priv->rb_chan); } WRITE_ONCE(session->active, 1); - WRITE_ONCE(session->been_active, 1); + WRITE_ONCE(session->priv->been_active, 1); ret = _lttng_session_metadata_statedump(session); if (ret) { WRITE_ONCE(session->active, 0); @@ -490,10 +511,10 @@ end: return ret; } -int lttng_session_disable(struct lttng_session *session) +int lttng_session_disable(struct lttng_kernel_session *session) { int ret = 0; - struct lttng_channel *chan; + struct lttng_kernel_channel_buffer_private *chan_priv; mutex_lock(&sessions_mutex); if (!session->active) { @@ -503,25 +524,25 @@ int lttng_session_disable(struct lttng_session *session) WRITE_ONCE(session->active, 0); /* Set transient enabler state to "disabled" */ - session->tstate = 0; + session->priv->tstate = 0; lttng_session_sync_event_enablers(session); /* Set each stream's quiescent state. */ - list_for_each_entry(chan, &session->chan, list) { - if (chan->channel_type != METADATA_CHANNEL) - lib_ring_buffer_set_quiescent_channel(chan->chan); + list_for_each_entry(chan_priv, &session->priv->chan, node) { + if (chan_priv->channel_type != METADATA_CHANNEL) + lib_ring_buffer_set_quiescent_channel(chan_priv->rb_chan); } end: mutex_unlock(&sessions_mutex); return ret; } -int lttng_session_metadata_regenerate(struct lttng_session *session) +int lttng_session_metadata_regenerate(struct lttng_kernel_session *session) { int ret = 0; - struct lttng_channel *chan; - struct lttng_event *event; - struct lttng_metadata_cache *cache = session->metadata_cache; + struct lttng_kernel_channel_buffer_private *chan_priv; + struct lttng_kernel_event_recorder_private *event_recorder_priv; + struct lttng_metadata_cache *cache = session->priv->metadata_cache; struct lttng_metadata_stream *stream; mutex_lock(&sessions_mutex); @@ -534,19 +555,19 @@ int lttng_session_metadata_regenerate(struct lttng_session *session) memset(cache->data, 0, cache->cache_alloc); cache->metadata_written = 0; cache->version++; - list_for_each_entry(stream, &session->metadata_cache->metadata_stream, list) { + list_for_each_entry(stream, &session->priv->metadata_cache->metadata_stream, list) { stream->metadata_out = 0; stream->metadata_in = 0; } mutex_unlock(&cache->lock); - session->metadata_dumped = 0; - list_for_each_entry(chan, &session->chan, list) { - chan->metadata_dumped = 0; + session->priv->metadata_dumped = 0; + list_for_each_entry(chan_priv, &session->priv->chan, node) { + chan_priv->metadata_dumped = 0; } - list_for_each_entry(event, &session->events, list) { - event->metadata_dumped = 0; + list_for_each_entry(event_recorder_priv, &session->priv->events, parent.node) { + event_recorder_priv->metadata_dumped = 0; } ret = _lttng_session_metadata_statedump(session); @@ -556,12 +577,25 @@ end: return ret; } -int lttng_channel_enable(struct lttng_channel *channel) +static +bool is_channel_buffer_metadata(struct lttng_kernel_channel_common *channel) +{ + struct lttng_kernel_channel_buffer *chan_buf; + + if (channel->type != LTTNG_KERNEL_CHANNEL_TYPE_BUFFER) + return false; + chan_buf = container_of(channel, struct lttng_kernel_channel_buffer, parent); + if (chan_buf->priv->channel_type == METADATA_CHANNEL) + return true; + return false; +} + +int lttng_channel_enable(struct lttng_kernel_channel_common *channel) { int ret = 0; mutex_lock(&sessions_mutex); - if (channel->channel_type == METADATA_CHANNEL) { + if (is_channel_buffer_metadata(channel)) { ret = -EPERM; goto end; } @@ -570,7 +604,7 @@ int lttng_channel_enable(struct lttng_channel *channel) goto end; } /* Set transient enabler state to "enabled" */ - channel->tstate = 1; + channel->priv->tstate = 1; lttng_session_sync_event_enablers(channel->session); /* Set atomically the state to "enabled" */ WRITE_ONCE(channel->enabled, 1); @@ -579,12 +613,12 @@ end: return ret; } -int lttng_channel_disable(struct lttng_channel *channel) +int lttng_channel_disable(struct lttng_kernel_channel_common *channel) { int ret = 0; mutex_lock(&sessions_mutex); - if (channel->channel_type == METADATA_CHANNEL) { + if (is_channel_buffer_metadata(channel)) { ret = -EPERM; goto end; } @@ -595,33 +629,56 @@ int lttng_channel_disable(struct lttng_channel *channel) /* Set atomically the state to "disabled" */ WRITE_ONCE(channel->enabled, 0); /* Set transient enabler state to "enabled" */ - channel->tstate = 0; + channel->priv->tstate = 0; lttng_session_sync_event_enablers(channel->session); end: mutex_unlock(&sessions_mutex); return ret; } -int lttng_event_enable(struct lttng_event *event) +int lttng_event_enable(struct lttng_kernel_event_common *event) { int ret = 0; mutex_lock(&sessions_mutex); - if (event->chan->channel_type == METADATA_CHANNEL) { - ret = -EPERM; - goto end; + switch (event->type) { + case LTTNG_KERNEL_EVENT_TYPE_RECORDER: + { + struct lttng_kernel_event_recorder *event_recorder = + container_of(event, struct lttng_kernel_event_recorder, parent); + + if (event_recorder->chan->priv->channel_type == METADATA_CHANNEL) { + ret = -EPERM; + goto end; + } + break; + } + case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: + switch (event->priv->instrumentation) { + case LTTNG_KERNEL_ABI_KRETPROBE: + ret = -EINVAL; + goto end; + default: + break; + } + break; + default: + break; } + if (event->enabled) { ret = -EEXIST; goto end; } - switch (event->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: /* Fall-through */ + switch (event->priv->instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_fallthrough; case LTTNG_KERNEL_ABI_SYSCALL: ret = -EINVAL; break; - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ + case LTTNG_KERNEL_ABI_KPROBE: + lttng_fallthrough; case LTTNG_KERNEL_ABI_UPROBE: WRITE_ONCE(event->enabled, 1); break; @@ -630,8 +687,10 @@ int lttng_event_enable(struct lttng_event *event) ret = lttng_kretprobes_event_enable_state(event, 1); break; - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + case LTTNG_KERNEL_ABI_FUNCTION: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_NOOP: + lttng_fallthrough; default: WARN_ON_ONCE(1); ret = -EINVAL; @@ -641,101 +700,61 @@ end: return ret; } -int lttng_event_disable(struct lttng_event *event) +int lttng_event_disable(struct lttng_kernel_event_common *event) { int ret = 0; mutex_lock(&sessions_mutex); - if (event->chan->channel_type == METADATA_CHANNEL) { - ret = -EPERM; - goto end; - } - if (!event->enabled) { - ret = -EEXIST; - goto end; - } - switch (event->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: /* Fall-through */ - case LTTNG_KERNEL_ABI_SYSCALL: - ret = -EINVAL; - break; + switch (event->type) { + case LTTNG_KERNEL_EVENT_TYPE_RECORDER: + { + struct lttng_kernel_event_recorder *event_recorder = + container_of(event, struct lttng_kernel_event_recorder, parent); - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_UPROBE: - WRITE_ONCE(event->enabled, 0); + if (event_recorder->chan->priv->channel_type == METADATA_CHANNEL) { + ret = -EPERM; + goto end; + } break; - - case LTTNG_KERNEL_ABI_KRETPROBE: - - ret = lttng_kretprobes_event_enable_state(event, 0); + } + case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: + switch (event->priv->instrumentation) { + case LTTNG_KERNEL_ABI_KRETPROBE: + ret = -EINVAL; + goto end; + default: + break; + } break; - - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ default: - WARN_ON_ONCE(1); - ret = -EINVAL; + break; } -end: - mutex_unlock(&sessions_mutex); - return ret; -} -int lttng_event_notifier_enable(struct lttng_event_notifier *event_notifier) -{ - int ret = 0; - - mutex_lock(&sessions_mutex); - if (event_notifier->enabled) { + if (!event->enabled) { ret = -EEXIST; goto end; } - switch (event_notifier->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: /* Fall-through */ + switch (event->priv->instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_fallthrough; case LTTNG_KERNEL_ABI_SYSCALL: ret = -EINVAL; break; - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ + case LTTNG_KERNEL_ABI_KPROBE: + lttng_fallthrough; case LTTNG_KERNEL_ABI_UPROBE: - WRITE_ONCE(event_notifier->enabled, 1); - break; - - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_KRETPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ - default: - WARN_ON_ONCE(1); - ret = -EINVAL; - } -end: - mutex_unlock(&sessions_mutex); - return ret; -} - -int lttng_event_notifier_disable(struct lttng_event_notifier *event_notifier) -{ - int ret = 0; - - mutex_lock(&sessions_mutex); - if (!event_notifier->enabled) { - ret = -EEXIST; - goto end; - } - switch (event_notifier->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: /* Fall-through */ - case LTTNG_KERNEL_ABI_SYSCALL: - ret = -EINVAL; + WRITE_ONCE(event->enabled, 0); break; - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_UPROBE: - WRITE_ONCE(event_notifier->enabled, 0); + case LTTNG_KERNEL_ABI_KRETPROBE: + ret = lttng_kretprobes_event_enable_state(event, 0); break; - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_KRETPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + case LTTNG_KERNEL_ABI_FUNCTION: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_NOOP: + lttng_fallthrough; default: WARN_ON_ONCE(1); ret = -EINVAL; @@ -745,7 +764,7 @@ end: return ret; } -struct lttng_channel *lttng_channel_create(struct lttng_session *session, +struct lttng_kernel_channel_buffer *lttng_channel_buffer_create(struct lttng_kernel_session *session, const char *transport_name, void *buf_addr, size_t subbuf_size, size_t num_subbuf, @@ -753,11 +772,12 @@ struct lttng_channel *lttng_channel_create(struct lttng_session *session, unsigned int read_timer_interval, enum channel_type channel_type) { - struct lttng_channel *chan; + struct lttng_kernel_channel_buffer *chan; + struct lttng_kernel_channel_buffer_private *chan_priv; struct lttng_transport *transport = NULL; mutex_lock(&sessions_mutex); - if (session->been_active && channel_type != METADATA_CHANNEL) + if (session->priv->been_active && channel_type != METADATA_CHANNEL) goto active; /* Refuse to add channel to active session */ transport = lttng_transport_find(transport_name); if (!transport) { @@ -769,31 +789,39 @@ struct lttng_channel *lttng_channel_create(struct lttng_session *session, printk(KERN_WARNING "LTTng: Can't lock transport module.\n"); goto notransport; } - chan = kzalloc(sizeof(struct lttng_channel), GFP_KERNEL); + chan = kzalloc(sizeof(struct lttng_kernel_channel_buffer), GFP_KERNEL); if (!chan) goto nomem; - chan->session = session; - chan->id = session->free_chan_id++; + chan_priv = kzalloc(sizeof(struct lttng_kernel_channel_buffer_private), GFP_KERNEL); + if (!chan_priv) + goto nomem_priv; + chan->priv = chan_priv; + chan_priv->pub = chan; + chan->parent.type = LTTNG_KERNEL_CHANNEL_TYPE_BUFFER; + chan->parent.session = session; + chan->priv->id = session->priv->free_chan_id++; chan->ops = &transport->ops; /* * Note: the channel creation op already writes into the packet * headers. Therefore the "chan" information used as input * should be already accessible. */ - chan->chan = transport->ops.channel_create(transport_name, + chan->priv->rb_chan = transport->ops.priv->channel_create(transport_name, chan, buf_addr, subbuf_size, num_subbuf, switch_timer_interval, read_timer_interval); - if (!chan->chan) + if (!chan->priv->rb_chan) goto create_error; - chan->tstate = 1; - chan->enabled = 1; - chan->transport = transport; - chan->channel_type = channel_type; - list_add(&chan->list, &session->chan); + chan->priv->parent.tstate = 1; + chan->parent.enabled = 1; + chan->priv->transport = transport; + chan->priv->channel_type = channel_type; + list_add(&chan->priv->node, &session->priv->chan); mutex_unlock(&sessions_mutex); return chan; create_error: + kfree(chan_priv); +nomem_priv: kfree(chan); nomem: if (transport) @@ -810,18 +838,19 @@ active: * Needs to be called with sessions mutex held. */ static -void _lttng_channel_destroy(struct lttng_channel *chan) +void _lttng_channel_destroy(struct lttng_kernel_channel_buffer *chan) { - chan->ops->channel_destroy(chan->chan); - module_put(chan->transport->owner); - list_del(&chan->list); - lttng_kernel_destroy_context(chan->ctx); + chan->ops->priv->channel_destroy(chan->priv->rb_chan); + module_put(chan->priv->transport->owner); + list_del(&chan->priv->node); + lttng_kernel_destroy_context(chan->priv->ctx); + kfree(chan->priv); kfree(chan); } -void lttng_metadata_channel_destroy(struct lttng_channel *chan) +void lttng_metadata_channel_destroy(struct lttng_kernel_channel_buffer *chan) { - BUG_ON(chan->channel_type != METADATA_CHANNEL); + BUG_ON(chan->priv->channel_type != METADATA_CHANNEL); /* Protect the metadata cache with the sessions_mutex. */ mutex_lock(&sessions_mutex); @@ -842,19 +871,22 @@ void _lttng_metadata_channel_hangup(struct lttng_metadata_stream *stream) * Supports event creation while tracing session is active. * Needs to be called with sessions mutex held. */ -struct lttng_event *_lttng_event_create(struct lttng_channel *chan, - struct lttng_kernel_abi_event *event_param, - void *filter, - const struct lttng_kernel_event_desc *event_desc, - enum lttng_kernel_abi_instrumentation itype) -{ - struct lttng_session *session = chan->session; - struct lttng_event *event; +static +struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler, + 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 lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param; + enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation; + struct lttng_kernel_event_recorder *event_recorder; + struct lttng_kernel_event_recorder_private *event_recorder_priv; + struct lttng_kernel_event_common_private *event_priv; const char *event_name; struct hlist_head *head; int ret; - if (chan->free_event_id == -1U) { + if (chan->priv->free_event_id == -1U) { ret = -EMFILE; goto full; } @@ -864,52 +896,69 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, event_name = event_desc->event_name; break; - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_UPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_KRETPROBE: /* Fall-through */ + case LTTNG_KERNEL_ABI_KPROBE: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_UPROBE: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_KRETPROBE: + lttng_fallthrough; case LTTNG_KERNEL_ABI_SYSCALL: event_name = event_param->name; break; - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + case LTTNG_KERNEL_ABI_FUNCTION: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_NOOP: + lttng_fallthrough; default: WARN_ON_ONCE(1); ret = -EINVAL; goto type_error; } - head = utils_borrow_hash_table_bucket(session->events_ht.table, - LTTNG_EVENT_HT_SIZE, event_name); - lttng_hlist_for_each_entry(event, head, hlist) { - WARN_ON_ONCE(!event->desc); - if (!strncmp(event->desc->event_name, event_name, + head = utils_borrow_hash_table_bucket(events_ht->table, LTTNG_EVENT_HT_SIZE, event_name); + lttng_hlist_for_each_entry(event_priv, head, hlist_node) { + event_recorder_priv = container_of(event_priv, struct lttng_kernel_event_recorder_private, parent); + + WARN_ON_ONCE(!event_priv->desc); + if (!strncmp(event_priv->desc->event_name, event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1) - && chan == event->chan) { + && chan == event_recorder_priv->pub->chan) { ret = -EEXIST; goto exist; } } - event = kmem_cache_zalloc(event_cache, GFP_KERNEL); - if (!event) { + event_recorder = kmem_cache_zalloc(event_recorder_cache, GFP_KERNEL); + if (!event_recorder) { ret = -ENOMEM; goto cache_error; } - event->chan = chan; - event->filter = filter; - event->id = chan->free_event_id++; - event->instrumentation = itype; - INIT_LIST_HEAD(&event->filter_bytecode_runtime_head); - INIT_LIST_HEAD(&event->enablers_ref_head); + event_recorder_priv = kmem_cache_zalloc(event_recorder_private_cache, GFP_KERNEL); + if (!event_recorder_priv) { + ret = -ENOMEM; + goto cache_private_error; + } + event_recorder_priv->pub = event_recorder; + event_recorder_priv->parent.pub = &event_recorder->parent; + event_recorder->priv = event_recorder_priv; + event_recorder->parent.priv = &event_recorder_priv->parent; + event_recorder->parent.type = LTTNG_KERNEL_EVENT_TYPE_RECORDER; + + event_recorder->parent.run_filter = lttng_kernel_interpret_event_filter; + event_recorder->chan = chan; + event_recorder->priv->id = chan->priv->free_event_id++; + event_recorder->priv->parent.instrumentation = itype; + INIT_LIST_HEAD(&event_recorder->priv->parent.filter_bytecode_runtime_head); + INIT_LIST_HEAD(&event_recorder->priv->parent.enablers_ref_head); switch (itype) { case LTTNG_KERNEL_ABI_TRACEPOINT: /* Event will be enabled by enabler sync. */ - event->enabled = 0; - event->registered = 0; - event->desc = lttng_event_desc_get(event_name); - if (!event->desc) { + event_recorder->parent.enabled = 0; + event_recorder->priv->parent.registered = 0; + event_recorder->priv->parent.desc = lttng_event_desc_get(event_name); + if (!event_recorder->priv->parent.desc) { ret = -ENOENT; goto register_error; } @@ -922,8 +971,8 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, * Needs to be explicitly enabled after creation, since * we may want to apply filters. */ - event->enabled = 0; - event->registered = 1; + event_recorder->parent.enabled = 0; + event_recorder->priv->parent.registered = 1; /* * Populate lttng_event structure before event * registration. @@ -933,40 +982,53 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, event_param->u.kprobe.symbol_name, event_param->u.kprobe.offset, event_param->u.kprobe.addr, - event); + &event_recorder->parent); if (ret) { ret = -EINVAL; goto register_error; } - ret = try_module_get(event->desc->owner); + ret = try_module_get(event_recorder->priv->parent.desc->owner); WARN_ON_ONCE(!ret); break; case LTTNG_KERNEL_ABI_KRETPROBE: { - struct lttng_event *event_return; + struct lttng_kernel_event_recorder *event_recorder_return; + struct lttng_kernel_event_recorder_private *event_recorder_return_priv; /* kretprobe defines 2 events */ /* * Needs to be explicitly enabled after creation, since * we may want to apply filters. */ - event->enabled = 0; - event->registered = 1; - event_return = - kmem_cache_zalloc(event_cache, GFP_KERNEL); - if (!event_return) { + event_recorder->parent.enabled = 0; + event_recorder->priv->parent.registered = 1; + + event_recorder_return = kmem_cache_zalloc(event_recorder_cache, GFP_KERNEL); + if (!event_recorder_return) { + ret = -ENOMEM; + goto register_error; + } + event_recorder_return_priv = kmem_cache_zalloc(event_recorder_private_cache, GFP_KERNEL); + if (!event_recorder_return_priv) { + kmem_cache_free(event_recorder_cache, event_recorder_return); ret = -ENOMEM; goto register_error; } - event_return->chan = chan; - event_return->filter = filter; - event_return->id = chan->free_event_id++; - event_return->enabled = 0; - event_return->registered = 1; - event_return->instrumentation = itype; - INIT_LIST_HEAD(&event_return->filter_bytecode_runtime_head); - INIT_LIST_HEAD(&event_return->enablers_ref_head); + event_recorder_return_priv->pub = event_recorder_return; + event_recorder_return_priv->parent.pub = &event_recorder_return->parent; + event_recorder_return->priv = event_recorder_return_priv; + event_recorder_return->parent.priv = &event_recorder_return_priv->parent; + event_recorder_return->parent.type = LTTNG_KERNEL_EVENT_TYPE_RECORDER; + + event_recorder_return->parent.run_filter = lttng_kernel_interpret_event_filter; + event_recorder_return->chan = chan; + event_recorder_return->priv->id = chan->priv->free_event_id++; + event_recorder_return->priv->parent.instrumentation = itype; + event_recorder_return->parent.enabled = 0; + event_recorder_return->priv->parent.registered = 1; + INIT_LIST_HEAD(&event_recorder_return->priv->parent.filter_bytecode_runtime_head); + INIT_LIST_HEAD(&event_recorder_return->priv->parent.enablers_ref_head); /* * Populate lttng_event structure before kretprobe registration. */ @@ -975,27 +1037,29 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, event_param->u.kretprobe.symbol_name, event_param->u.kretprobe.offset, event_param->u.kretprobe.addr, - event, event_return); + &event_recorder->parent, &event_recorder_return->parent); if (ret) { - kmem_cache_free(event_cache, event_return); + kmem_cache_free(event_recorder_private_cache, event_recorder_return_priv); + kmem_cache_free(event_recorder_cache, event_recorder_return); ret = -EINVAL; goto register_error; } /* Take 2 refs on the module: one per event. */ - ret = try_module_get(event->desc->owner); + ret = try_module_get(event_recorder->priv->parent.desc->owner); WARN_ON_ONCE(!ret); - ret = try_module_get(event->desc->owner); + ret = try_module_get(event_recorder_return->priv->parent.desc->owner); WARN_ON_ONCE(!ret); - ret = _lttng_event_metadata_statedump(chan->session, chan, - event_return); + ret = _lttng_event_metadata_statedump(chan->parent.session, chan, + event_recorder_return); WARN_ON_ONCE(ret > 0); if (ret) { - kmem_cache_free(event_cache, event_return); - module_put(event->desc->owner); - module_put(event->desc->owner); + kmem_cache_free(event_recorder_private_cache, event_recorder_return_priv); + kmem_cache_free(event_recorder_cache, event_recorder_return); + module_put(event_recorder_return->priv->parent.desc->owner); + module_put(event_recorder->priv->parent.desc->owner); goto statedump_error; } - list_add(&event_return->list, &chan->session->events); + list_add(&event_recorder_return->priv->parent.node, &chan->parent.session->priv->events); break; } @@ -1004,18 +1068,18 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, * Needs to be explicitly enabled after creation, since * we may want to apply filters. */ - event->enabled = 0; - event->registered = 0; - event->desc = event_desc; + event_recorder->parent.enabled = 0; + event_recorder->priv->parent.registered = 0; + event_recorder->priv->parent.desc = event_desc; switch (event_param->u.syscall.entryexit) { case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT: ret = -EINVAL; goto register_error; case LTTNG_KERNEL_ABI_SYSCALL_ENTRY: - event->u.syscall.entryexit = LTTNG_SYSCALL_ENTRY; + event_recorder->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_ENTRY; break; case LTTNG_KERNEL_ABI_SYSCALL_EXIT: - event->u.syscall.entryexit = LTTNG_SYSCALL_EXIT; + event_recorder->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_EXIT; break; } switch (event_param->u.syscall.abi) { @@ -1023,13 +1087,13 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, ret = -EINVAL; goto register_error; case LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE: - event->u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE; + event_recorder->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE; break; case LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT: - event->u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT; + event_recorder->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT; break; } - if (!event->desc) { + if (!event_recorder->priv->parent.desc) { ret = -EINVAL; goto register_error; } @@ -1040,8 +1104,8 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, * Needs to be explicitly enabled after creation, since * we may want to apply filters. */ - event->enabled = 0; - event->registered = 1; + event_recorder->parent.enabled = 0; + event_recorder->priv->parent.registered = 1; /* * Populate lttng_event structure before event @@ -1051,33 +1115,37 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan, ret = lttng_uprobes_register_event(event_param->name, event_param->u.uprobe.fd, - event); + &event_recorder->parent); if (ret) goto register_error; - ret = try_module_get(event->desc->owner); + ret = try_module_get(event_recorder->priv->parent.desc->owner); WARN_ON_ONCE(!ret); break; - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + case LTTNG_KERNEL_ABI_FUNCTION: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_NOOP: + lttng_fallthrough; default: WARN_ON_ONCE(1); ret = -EINVAL; goto register_error; } - ret = _lttng_event_metadata_statedump(chan->session, chan, event); + ret = _lttng_event_metadata_statedump(chan->parent.session, chan, event_recorder); WARN_ON_ONCE(ret > 0); if (ret) { goto statedump_error; } - hlist_add_head(&event->hlist, head); - list_add(&event->list, &chan->session->events); - return event; + hlist_add_head(&event_recorder->priv->parent.hlist_node, head); + list_add(&event_recorder->priv->parent.node, &chan->parent.session->priv->events); + return event_recorder; statedump_error: /* If a statedump error occurs, events will not be readable. */ register_error: - kmem_cache_free(event_cache, event); + kmem_cache_free(event_recorder_private_cache, event_recorder_priv); +cache_private_error: + kmem_cache_free(event_recorder_cache, event_recorder); cache_error: exist: type_error: @@ -1085,14 +1153,18 @@ full: return ERR_PTR(ret); } -struct lttng_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, - void *filter, enum lttng_kernel_abi_instrumentation itype) -{ - struct lttng_event_notifier *event_notifier; +static +struct lttng_kernel_event_notifier *_lttng_kernel_event_notifier_create(struct lttng_event_notifier_enabler *event_enabler, + 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 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_kernel_event_common_private *event_priv; struct lttng_counter *error_counter; const char *event_name; struct hlist_head *head; @@ -1103,29 +1175,35 @@ struct lttng_event_notifier *_lttng_event_notifier_create( event_name = event_desc->event_name; break; - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_UPROBE: /* Fall-through */ + case LTTNG_KERNEL_ABI_KPROBE: + lttng_fallthrough; + 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: /* Fall-through */ - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + 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); ret = -EINVAL; goto type_error; } - head = utils_borrow_hash_table_bucket(event_notifier_group->event_notifiers_ht.table, - LTTNG_EVENT_NOTIFIER_HT_SIZE, event_name); - lttng_hlist_for_each_entry(event_notifier, head, hlist) { - WARN_ON_ONCE(!event_notifier->desc); - if (!strncmp(event_notifier->desc->event_name, event_name, + head = utils_borrow_hash_table_bucket(events_ht->table, LTTNG_EVENT_HT_SIZE, event_name); + lttng_hlist_for_each_entry(event_priv, head, hlist_node) { + event_notifier_priv = container_of(event_priv, struct lttng_kernel_event_notifier_private, parent); + + WARN_ON_ONCE(!event_priv->desc); + if (!strncmp(event_priv->desc->event_name, event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1) - && event_notifier_group == event_notifier->group - && token == event_notifier->user_token) { + && event_notifier_group == event_notifier_priv->group + && token == event_priv->user_token) { ret = -EEXIST; goto exist; } @@ -1136,25 +1214,35 @@ struct lttng_event_notifier *_lttng_event_notifier_create( ret = -ENOMEM; goto cache_error; } - - event_notifier->group = event_notifier_group; - event_notifier->user_token = token; - event_notifier->error_counter_index = error_counter_index; - event_notifier->num_captures = 0; - event_notifier->filter = filter; - event_notifier->instrumentation = itype; - event_notifier->send_notification = lttng_event_notifier_notification_send; - INIT_LIST_HEAD(&event_notifier->filter_bytecode_runtime_head); - INIT_LIST_HEAD(&event_notifier->capture_bytecode_runtime_head); - INIT_LIST_HEAD(&event_notifier->enablers_ref_head); + event_notifier_priv = kmem_cache_zalloc(event_notifier_private_cache, GFP_KERNEL); + if (!event_notifier_priv) { + ret = -ENOMEM; + goto cache_private_error; + } + event_notifier_priv->pub = event_notifier; + event_notifier_priv->parent.pub = &event_notifier->parent; + event_notifier->priv = event_notifier_priv; + event_notifier->parent.priv = &event_notifier_priv->parent; + event_notifier->parent.type = LTTNG_KERNEL_EVENT_TYPE_NOTIFIER; + + event_notifier->priv->group = event_notifier_group; + 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; + INIT_LIST_HEAD(&event_notifier->priv->parent.filter_bytecode_runtime_head); + INIT_LIST_HEAD(&event_notifier->priv->parent.enablers_ref_head); + INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); + event_notifier->parent.run_filter = lttng_kernel_interpret_event_filter; switch (itype) { case LTTNG_KERNEL_ABI_TRACEPOINT: /* Event will be enabled by enabler sync. */ - event_notifier->enabled = 0; - event_notifier->registered = 0; - event_notifier->desc = lttng_event_desc_get(event_name); - if (!event_notifier->desc) { + event_notifier->parent.enabled = 0; + event_notifier->priv->parent.registered = 0; + event_notifier->priv->parent.desc = lttng_event_desc_get(event_name); + if (!event_notifier->priv->parent.desc) { ret = -ENOENT; goto register_error; } @@ -1167,23 +1255,23 @@ struct lttng_event_notifier *_lttng_event_notifier_create( * Needs to be explicitly enabled after creation, since * we may want to apply filters. */ - event_notifier->enabled = 0; - event_notifier->registered = 1; + event_notifier->parent.enabled = 0; + event_notifier->priv->parent.registered = 1; /* * Populate lttng_event_notifier structure before event * registration. */ smp_wmb(); - ret = lttng_kprobes_register_event_notifier( - event_notifier_param->event.u.kprobe.symbol_name, - event_notifier_param->event.u.kprobe.offset, - event_notifier_param->event.u.kprobe.addr, - event_notifier); + 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; goto register_error; } - ret = try_module_get(event_notifier->desc->owner); + ret = try_module_get(event_notifier->priv->parent.desc->owner); WARN_ON_ONCE(!ret); break; @@ -1192,33 +1280,33 @@ struct lttng_event_notifier *_lttng_event_notifier_create( * Needs to be explicitly enabled after creation, since * we may want to apply filters. */ - event_notifier->enabled = 0; - event_notifier->registered = 0; - event_notifier->desc = event_desc; - switch (event_notifier_param->event.u.syscall.entryexit) { + event_notifier->parent.enabled = 0; + event_notifier->priv->parent.registered = 0; + event_notifier->priv->parent.desc = event_desc; + switch (event_param->u.syscall.entryexit) { case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT: ret = -EINVAL; goto register_error; case LTTNG_KERNEL_ABI_SYSCALL_ENTRY: - event_notifier->u.syscall.entryexit = LTTNG_SYSCALL_ENTRY; + event_notifier->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_ENTRY; break; case LTTNG_KERNEL_ABI_SYSCALL_EXIT: - event_notifier->u.syscall.entryexit = LTTNG_SYSCALL_EXIT; + 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; case LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE: - event_notifier->u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE; + event_notifier->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE; break; case LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT: - event_notifier->u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT; + event_notifier->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT; break; } - if (!event_notifier->desc) { + if (!event_notifier->priv->parent.desc) { ret = -EINVAL; goto register_error; } @@ -1229,8 +1317,8 @@ struct lttng_event_notifier *_lttng_event_notifier_create( * Needs to be explicitly enabled after creation, since * we may want to apply filters. */ - event_notifier->enabled = 0; - event_notifier->registered = 1; + event_notifier->parent.enabled = 0; + event_notifier->priv->parent.registered = 1; /* * Populate lttng_event_notifier structure before @@ -1238,27 +1326,29 @@ struct lttng_event_notifier *_lttng_event_notifier_create( */ smp_wmb(); - ret = lttng_uprobes_register_event_notifier( - event_notifier_param->event.name, - event_notifier_param->event.u.uprobe.fd, - event_notifier); + ret = lttng_uprobes_register_event(event_param->name, + event_param->u.uprobe.fd, + &event_notifier->parent); if (ret) goto register_error; - ret = try_module_get(event_notifier->desc->owner); + ret = try_module_get(event_notifier->priv->parent.desc->owner); WARN_ON_ONCE(!ret); break; - case LTTNG_KERNEL_ABI_KRETPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + 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); ret = -EINVAL; goto register_error; } - list_add(&event_notifier->list, &event_notifier_group->event_notifiers_head); - hlist_add_head(&event_notifier->hlist, head); + list_add(&event_notifier->priv->parent.node, &event_notifier_group->event_notifiers_head); + hlist_add_head(&event_notifier->priv->parent.hlist_node, head); /* * Clear the error counter bucket. The sessiond keeps track of which @@ -1273,18 +1363,18 @@ struct lttng_event_notifier *_lttng_event_notifier_create( /* * Check that the index is within the boundary of the counter. */ - if (event_notifier->error_counter_index >= event_notifier_group->error_counter_len) { + 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->error_counter_index); + event_notifier_group->error_counter_len, event_notifier->priv->error_counter_index); ret = -EINVAL; goto register_error; } - dimension_index[0] = event_notifier->error_counter_index; + 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->error_counter_index); + event_notifier->priv->error_counter_index); goto register_error; } } @@ -1292,6 +1382,8 @@ struct lttng_event_notifier *_lttng_event_notifier_create( return event_notifier; register_error: + kmem_cache_free(event_notifier_private_cache, event_notifier_priv); +cache_private_error: kmem_cache_free(event_notifier_cache, event_notifier); cache_error: exist: @@ -1299,6 +1391,50 @@ type_error: return ERR_PTR(ret); } +struct lttng_kernel_event_common *_lttng_kernel_event_create(struct lttng_event_enabler_common *event_enabler, + const struct lttng_kernel_event_desc *event_desc) +{ + 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_event_recorder *event_recorder; + + event_recorder = _lttng_kernel_event_recorder_create(event_recorder_enabler, event_desc); + if (!event_recorder) + return NULL; + return &event_recorder->parent; + } + case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: + { + struct lttng_event_notifier_enabler *event_notifier_enabler = + container_of(event_enabler, struct lttng_event_notifier_enabler, parent); + struct lttng_kernel_event_notifier *event_notifier; + + event_notifier = _lttng_kernel_event_notifier_create(event_notifier_enabler, event_desc); + if (!event_notifier) + return NULL; + return &event_notifier->parent; + } + default: + return NULL; + } +} + +struct lttng_kernel_event_common *lttng_kernel_event_create(struct lttng_event_enabler_common *event_enabler, + const struct lttng_kernel_event_desc *event_desc) +{ + struct lttng_kernel_event_common *event; + + mutex_lock(&sessions_mutex); + event = _lttng_kernel_event_create(event_enabler, event_desc); + mutex_unlock(&sessions_mutex); + return event; +} + + + int lttng_kernel_counter_read(struct lttng_counter *counter, const size_t *dim_indexes, int32_t cpu, int64_t *val, bool *overflow, bool *underflow) @@ -1321,91 +1457,70 @@ int lttng_kernel_counter_clear(struct lttng_counter *counter, return counter->ops->counter_clear(counter->counter, dim_indexes); } -struct lttng_event *lttng_event_create(struct lttng_channel *chan, - struct lttng_kernel_abi_event *event_param, - void *filter, - const struct lttng_kernel_event_desc *event_desc, - enum lttng_kernel_abi_instrumentation itype) -{ - struct lttng_event *event; - - mutex_lock(&sessions_mutex); - event = _lttng_event_create(chan, event_param, filter, event_desc, - itype); - mutex_unlock(&sessions_mutex); - return event; -} - -struct lttng_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, - void *filter, enum lttng_kernel_abi_instrumentation itype) -{ - struct lttng_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, filter, itype); - mutex_unlock(&sessions_mutex); - return event_notifier; -} - /* Only used for tracepoints for now. */ static -void register_event(struct lttng_event *event) +void register_event(struct lttng_kernel_event_common *event) { const struct lttng_kernel_event_desc *desc; int ret = -EINVAL; - if (event->registered) + if (event->priv->registered) return; - desc = event->desc; - switch (event->instrumentation) { + desc = event->priv->desc; + switch (event->priv->instrumentation) { case LTTNG_KERNEL_ABI_TRACEPOINT: ret = lttng_wrapper_tracepoint_probe_register(desc->event_kname, - desc->probe_callback, + desc->tp_class->probe_callback, event); break; case LTTNG_KERNEL_ABI_SYSCALL: - ret = lttng_syscall_filter_enable_event(event->chan, event); + ret = lttng_syscall_filter_enable_event(event); break; - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_UPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_KRETPROBE: + case LTTNG_KERNEL_ABI_KPROBE: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_UPROBE: ret = 0; break; - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + 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: + lttng_fallthrough; default: WARN_ON_ONCE(1); } if (!ret) - event->registered = 1; + event->priv->registered = 1; } -/* - * Only used internally at session destruction. - */ -int _lttng_event_unregister(struct lttng_event *event) +int _lttng_event_unregister(struct lttng_kernel_event_common *event) { + struct lttng_kernel_event_common_private *event_priv = event->priv; const struct lttng_kernel_event_desc *desc; int ret = -EINVAL; - if (!event->registered) + if (!event_priv->registered) return 0; - desc = event->desc; - switch (event->instrumentation) { + desc = event_priv->desc; + switch (event_priv->instrumentation) { case LTTNG_KERNEL_ABI_TRACEPOINT: - ret = lttng_wrapper_tracepoint_probe_unregister(event->desc->event_kname, - event->desc->probe_callback, + ret = lttng_wrapper_tracepoint_probe_unregister(event_priv->desc->event_kname, + event_priv->desc->tp_class->probe_callback, event); break; @@ -1415,16 +1530,30 @@ int _lttng_event_unregister(struct lttng_event *event) break; case LTTNG_KERNEL_ABI_KRETPROBE: - lttng_kretprobes_unregister(event); - 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->chan, event); + 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: @@ -1432,92 +1561,13 @@ int _lttng_event_unregister(struct lttng_event *event) ret = 0; break; - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - default: - WARN_ON_ONCE(1); - } - if (!ret) - event->registered = 0; - return ret; -} - -/* Only used for tracepoints for now. */ -static -void register_event_notifier(struct lttng_event_notifier *event_notifier) -{ - const struct lttng_kernel_event_desc *desc; - int ret = -EINVAL; - - if (event_notifier->registered) - return; - - desc = event_notifier->desc; - switch (event_notifier->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: - ret = lttng_wrapper_tracepoint_probe_register(desc->event_kname, - desc->event_notifier_callback, - event_notifier); - break; - - case LTTNG_KERNEL_ABI_SYSCALL: - ret = lttng_syscall_filter_enable_event_notifier(event_notifier); - break; - - case LTTNG_KERNEL_ABI_KPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_UPROBE: - ret = 0; - break; - - case LTTNG_KERNEL_ABI_KRETPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ - default: - WARN_ON_ONCE(1); - } - if (!ret) - event_notifier->registered = 1; -} - -static -int _lttng_event_notifier_unregister( - struct lttng_event_notifier *event_notifier) -{ - const struct lttng_kernel_event_desc *desc; - int ret = -EINVAL; - - if (!event_notifier->registered) - return 0; - - desc = event_notifier->desc; - switch (event_notifier->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: - ret = lttng_wrapper_tracepoint_probe_unregister(event_notifier->desc->event_kname, - event_notifier->desc->event_notifier_callback, - event_notifier); - break; - - case LTTNG_KERNEL_ABI_KPROBE: - lttng_kprobes_unregister_event_notifier(event_notifier); - ret = 0; - break; - - case LTTNG_KERNEL_ABI_UPROBE: - lttng_uprobes_unregister_event_notifier(event_notifier); - ret = 0; - break; - - case LTTNG_KERNEL_ABI_SYSCALL: - ret = lttng_syscall_filter_disable_event_notifier(event_notifier); - break; - - case LTTNG_KERNEL_ABI_KRETPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + case LTTNG_KERNEL_ABI_FUNCTION: + lttng_fallthrough; default: WARN_ON_ONCE(1); } if (!ret) - event_notifier->registered = 0; + event_priv->registered = 0; return ret; } @@ -1525,90 +1575,101 @@ int _lttng_event_notifier_unregister( * Only used internally at session destruction. */ static -void _lttng_event_destroy(struct lttng_event *event) +void _lttng_event_destroy(struct lttng_kernel_event_common *event) { + struct lttng_kernel_event_common_private *event_priv = event->priv; struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; - switch (event->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: - lttng_event_desc_put(event->desc); - break; + lttng_free_event_filter_runtime(event); + /* Free event enabler refs */ + list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, + &event_priv->enablers_ref_head, node) + kfree(enabler_ref); - case LTTNG_KERNEL_ABI_KPROBE: - module_put(event->desc->owner); - lttng_kprobes_destroy_event_private(event); - break; + switch (event->type) { + case LTTNG_KERNEL_EVENT_TYPE_RECORDER: + { + struct lttng_kernel_event_recorder *event_recorder = + container_of(event, struct lttng_kernel_event_recorder, parent); - case LTTNG_KERNEL_ABI_KRETPROBE: - module_put(event->desc->owner); - lttng_kretprobes_destroy_private(event); - break; + switch (event_priv->instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_event_desc_put(event_priv->desc); + break; - case LTTNG_KERNEL_ABI_SYSCALL: - break; + case LTTNG_KERNEL_ABI_KPROBE: + module_put(event_priv->desc->owner); + lttng_kprobes_destroy_event_private(&event_recorder->parent); + break; - case LTTNG_KERNEL_ABI_UPROBE: - module_put(event->desc->owner); - lttng_uprobes_destroy_event_private(event); - break; + case LTTNG_KERNEL_ABI_KRETPROBE: + module_put(event_priv->desc->owner); + lttng_kretprobes_destroy_private(&event_recorder->parent); + break; - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ - default: - WARN_ON_ONCE(1); - } - list_del(&event->list); - lttng_kernel_destroy_context(event->ctx); - lttng_free_event_filter_runtime(event); - /* Free event enabler refs */ - list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, - &event->enablers_ref_head, node) - kfree(enabler_ref); - kmem_cache_free(event_cache, event); -} + case LTTNG_KERNEL_ABI_SYSCALL: + break; -/* - * Only used internally at session destruction. - */ -static -void _lttng_event_notifier_destroy(struct lttng_event_notifier *event_notifier) -{ - struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; + case LTTNG_KERNEL_ABI_UPROBE: + module_put(event_priv->desc->owner); + lttng_uprobes_destroy_event_private(&event_recorder->parent); + break; - switch (event_notifier->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: - lttng_event_desc_put(event_notifier->desc); + case LTTNG_KERNEL_ABI_FUNCTION: + lttng_fallthrough; + case LTTNG_KERNEL_ABI_NOOP: + lttng_fallthrough; + default: + WARN_ON_ONCE(1); + } + list_del(&event_recorder->priv->parent.node); + kmem_cache_free(event_recorder_private_cache, event_recorder->priv); + kmem_cache_free(event_recorder_cache, event_recorder); break; + } + case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: + { + struct lttng_kernel_event_notifier *event_notifier = + container_of(event, struct lttng_kernel_event_notifier, parent); - case LTTNG_KERNEL_ABI_KPROBE: - module_put(event_notifier->desc->owner); - lttng_kprobes_destroy_event_notifier_private(event_notifier); - break; + switch (event_notifier->priv->parent.instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_event_desc_put(event_notifier->priv->parent.desc); + break; - case LTTNG_KERNEL_ABI_SYSCALL: - break; + case LTTNG_KERNEL_ABI_KPROBE: + module_put(event_notifier->priv->parent.desc->owner); + lttng_kprobes_destroy_event_private(&event_notifier->parent); + break; - case LTTNG_KERNEL_ABI_UPROBE: - module_put(event_notifier->desc->owner); - lttng_uprobes_destroy_event_notifier_private(event_notifier); - break; + case LTTNG_KERNEL_ABI_SYSCALL: + break; - case LTTNG_KERNEL_ABI_KRETPROBE: /* Fall-through */ - case LTTNG_KERNEL_ABI_FUNCTION: /* Fall-through */ - case LTTNG_KERNEL_ABI_NOOP: /* Fall-through */ + case LTTNG_KERNEL_ABI_UPROBE: + module_put(event_notifier->priv->parent.desc->owner); + lttng_uprobes_destroy_event_private(&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); + } + list_del(&event_notifier->priv->parent.node); + kmem_cache_free(event_notifier_private_cache, event_notifier->priv); + kmem_cache_free(event_notifier_cache, event_notifier); + break; + } default: WARN_ON_ONCE(1); } - list_del(&event_notifier->list); - lttng_free_event_notifier_filter_runtime(event_notifier); - /* Free event enabler refs */ - list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, - &event_notifier->enablers_ref_head, node) - kfree(enabler_ref); - kmem_cache_free(event_notifier_cache, event_notifier); } -struct lttng_id_tracker *get_tracker(struct lttng_session *session, +struct lttng_kernel_id_tracker *get_tracker(struct lttng_kernel_session *session, enum tracker_type tracker_type) { switch (tracker_type) { @@ -1630,10 +1691,10 @@ struct lttng_id_tracker *get_tracker(struct lttng_session *session, } } -int lttng_session_track_id(struct lttng_session *session, +int lttng_session_track_id(struct lttng_kernel_session *session, enum tracker_type tracker_type, int id) { - struct lttng_id_tracker *tracker; + struct lttng_kernel_id_tracker *tracker; int ret; tracker = get_tracker(session, tracker_type); @@ -1653,10 +1714,10 @@ int lttng_session_track_id(struct lttng_session *session, return ret; } -int lttng_session_untrack_id(struct lttng_session *session, +int lttng_session_untrack_id(struct lttng_kernel_session *session, enum tracker_type tracker_type, int id) { - struct lttng_id_tracker *tracker; + struct lttng_kernel_id_tracker *tracker; int ret; tracker = get_tracker(session, tracker_type); @@ -1678,8 +1739,8 @@ int lttng_session_untrack_id(struct lttng_session *session, static void *id_list_start(struct seq_file *m, loff_t *pos) { - struct lttng_id_tracker *id_tracker = m->private; - struct lttng_id_tracker_rcu *id_tracker_p = id_tracker->p; + struct lttng_kernel_id_tracker *id_tracker = m->private; + struct lttng_kernel_id_tracker_rcu *id_tracker_p = id_tracker->p; struct lttng_id_hash_node *e; int iter = 0, i; @@ -1708,8 +1769,8 @@ void *id_list_start(struct seq_file *m, loff_t *pos) static void *id_list_next(struct seq_file *m, void *p, loff_t *ppos) { - struct lttng_id_tracker *id_tracker = m->private; - struct lttng_id_tracker_rcu *id_tracker_p = id_tracker->p; + struct lttng_kernel_id_tracker *id_tracker = m->private; + struct lttng_kernel_id_tracker_rcu *id_tracker_p = id_tracker->p; struct lttng_id_hash_node *e; int iter = 0, i; @@ -1743,8 +1804,8 @@ void id_list_stop(struct seq_file *m, void *p) static int id_list_show(struct seq_file *m, void *p) { - struct lttng_id_tracker *id_tracker = m->private; - struct lttng_id_tracker_rcu *id_tracker_p = id_tracker->p; + struct lttng_kernel_id_tracker *id_tracker = m->private; + struct lttng_kernel_id_tracker_rcu *id_tracker_p = id_tracker->p; int id; if (p == id_tracker_p) { @@ -1755,7 +1816,7 @@ int id_list_show(struct seq_file *m, void *p) id = lttng_id_tracker_get_node_id(e); } - switch (id_tracker->tracker_type) { + switch (id_tracker->priv->tracker_type) { case TRACKER_PID: seq_printf(m, "process { pid = %d; };\n", id); break; @@ -1798,13 +1859,13 @@ static int lttng_tracker_ids_list_release(struct inode *inode, struct file *file) { struct seq_file *m = file->private_data; - struct lttng_id_tracker *id_tracker = m->private; + struct lttng_kernel_id_tracker *id_tracker = m->private; int ret; WARN_ON_ONCE(!id_tracker); ret = seq_release(inode, file); if (!ret) - fput(id_tracker->session->file); + fput(id_tracker->priv->session->priv->file); return ret; } @@ -1816,7 +1877,7 @@ const struct file_operations lttng_tracker_ids_list_fops = { .release = lttng_tracker_ids_list_release, }; -int lttng_session_list_tracker_ids(struct lttng_session *session, +int lttng_session_list_tracker_ids(struct lttng_kernel_session *session, enum tracker_type tracker_type) { struct file *tracker_ids_list_file; @@ -1836,7 +1897,7 @@ int lttng_session_list_tracker_ids(struct lttng_session *session, ret = PTR_ERR(tracker_ids_list_file); goto file_error; } - if (!atomic_long_add_unless(&session->file->f_count, 1, LONG_MAX)) { + if (!atomic_long_add_unless(&session->priv->file->f_count, 1, LONG_MAX)) { ret = -EOVERFLOW; goto refcount_error; } @@ -1852,7 +1913,7 @@ int lttng_session_list_tracker_ids(struct lttng_session *session, return file_fd; open_error: - atomic_long_dec(&session->file->f_count); + atomic_long_dec(&session->priv->file->f_count); refcount_error: fput(tracker_ids_list_file); file_error: @@ -1883,8 +1944,9 @@ int lttng_match_enabler_name(const char *desc_name, return 1; } -int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, - struct lttng_enabler *enabler) +static +int lttng_desc_match_enabler_check(const struct lttng_kernel_event_desc *desc, + struct lttng_event_enabler_common *enabler) { const char *desc_name, *enabler_name; bool compat = false, entry = false; @@ -1966,49 +2028,109 @@ int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, } break; - default: + default: + WARN_ON_ONCE(1); + return -EINVAL; + } +} + +bool lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, + struct lttng_event_enabler_common *enabler) +{ + int ret; + + ret = lttng_desc_match_enabler_check(desc, enabler); + if (ret < 0) { WARN_ON_ONCE(1); - return -EINVAL; + return false; } + return ret; } -static -int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, - struct lttng_event *event) +bool lttng_event_enabler_match_event(struct lttng_event_enabler_common *event_enabler, + struct lttng_kernel_event_common *event) { - struct lttng_enabler *base_enabler = lttng_event_enabler_as_enabler( - event_enabler); + if (event_enabler->event_param.instrumentation != event->priv->instrumentation) + return false; - if (base_enabler->event_param.instrumentation != event->instrumentation) - return 0; - if (lttng_desc_match_enabler(event->desc, base_enabler) - && event->chan == event_enabler->chan) - return 1; - else - return 0; + 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_event_recorder *event_recorder = + container_of(event, struct lttng_kernel_event_recorder, parent); + + if (lttng_desc_match_enabler(event->priv->desc, event_enabler) + && event_recorder->chan == event_recorder_enabler->chan) + return true; + else + return false; + } + case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: + { + struct lttng_event_notifier_enabler *event_notifier_enabler = + container_of(event_enabler, struct lttng_event_notifier_enabler, parent); + struct lttng_kernel_event_notifier *event_notifier = + container_of(event, struct lttng_kernel_event_notifier, parent); + + if (lttng_desc_match_enabler(event->priv->desc, event_enabler) + && event_notifier->priv->group == event_notifier_enabler->group + && event->priv->user_token == event_enabler->user_token) + return true; + else + return false; + } + default: + WARN_ON_ONCE(1); + return false; + } } -static -int lttng_event_notifier_enabler_match_event_notifier(struct lttng_event_notifier_enabler *event_notifier_enabler, - struct lttng_event_notifier *event_notifier) +bool lttng_event_enabler_desc_match_event(struct lttng_event_enabler_common *event_enabler, + const struct lttng_kernel_event_desc *desc, + struct lttng_kernel_event_common *event) { - struct lttng_enabler *base_enabler = lttng_event_notifier_enabler_as_enabler( - event_notifier_enabler); + if (event_enabler->event_param.instrumentation != event->priv->instrumentation) + return false; - if (base_enabler->event_param.instrumentation != event_notifier->instrumentation) - return 0; - if (lttng_desc_match_enabler(event_notifier->desc, base_enabler) - && event_notifier->group == event_notifier_enabler->group - && event_notifier->user_token == event_notifier_enabler->base.user_token) - return 1; - else - return 0; + 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_event_recorder *event_recorder = + container_of(event, struct lttng_kernel_event_recorder, parent); + + if (event->priv->desc == desc && event_recorder->chan == event_recorder_enabler->chan) + return true; + else + return false; + } + case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: + { + struct lttng_event_notifier_enabler *event_notifier_enabler = + container_of(event_enabler, struct lttng_event_notifier_enabler, parent); + struct lttng_kernel_event_notifier *event_notifier = + container_of(event, struct lttng_kernel_event_notifier, parent); + + if (event->priv->desc == desc + && event_notifier->priv->group == event_notifier_enabler->group + && event->priv->user_token == event_enabler->user_token) + return true; + else + return false; + } + default: + WARN_ON_ONCE(1); + return false; + } } static struct lttng_enabler_ref *lttng_enabler_ref( struct list_head *enablers_ref_list, - struct lttng_enabler *enabler) + struct lttng_event_enabler_common *enabler) { struct lttng_enabler_ref *enabler_ref; @@ -2020,13 +2142,13 @@ struct lttng_enabler_ref *lttng_enabler_ref( } static -void lttng_create_tracepoint_event_if_missing(struct lttng_event_enabler *event_enabler) +void lttng_create_tracepoint_event_if_missing(struct lttng_event_enabler_common *event_enabler) { - struct lttng_session *session = event_enabler->chan->session; + struct lttng_event_ht *events_ht = lttng_get_event_ht_from_enabler(event_enabler); struct lttng_kernel_probe_desc *probe_desc; const struct lttng_kernel_event_desc *desc; - int i; struct list_head *probe_list; + int i; probe_list = lttng_get_probe_list_head(); /* @@ -2038,34 +2160,28 @@ void lttng_create_tracepoint_event_if_missing(struct lttng_event_enabler *event_ for (i = 0; i < probe_desc->nr_events; i++) { int found = 0; struct hlist_head *head; - struct lttng_event *event; + struct lttng_kernel_event_common *event; + struct lttng_kernel_event_common_private *event_priv; desc = probe_desc->event_desc[i]; - if (!lttng_desc_match_enabler(desc, - lttng_event_enabler_as_enabler(event_enabler))) + if (!lttng_desc_match_enabler(desc, event_enabler)) continue; /* * Check if already created. */ - head = utils_borrow_hash_table_bucket( - session->events_ht.table, LTTNG_EVENT_HT_SIZE, - desc->event_name); - lttng_hlist_for_each_entry(event, head, hlist) { - if (event->desc == desc - && event->chan == event_enabler->chan) + head = utils_borrow_hash_table_bucket(events_ht->table, LTTNG_EVENT_HT_SIZE, desc->event_name); + lttng_hlist_for_each_entry(event_priv, head, hlist_node) { + if (lttng_event_enabler_desc_match_event(event_enabler, desc, event_priv->pub)) found = 1; } if (found) continue; /* - * We need to create an event for this - * event probe. + * We need to create an event for this event probe. */ - event = _lttng_event_create(event_enabler->chan, - NULL, NULL, desc, - LTTNG_KERNEL_ABI_TRACEPOINT); + event = _lttng_kernel_event_create(event_enabler, desc); if (!event) { printk(KERN_INFO "LTTng: Unable to create event %s\n", probe_desc->event_desc[i]->event_name); @@ -2075,90 +2191,22 @@ void lttng_create_tracepoint_event_if_missing(struct lttng_event_enabler *event_ } static -void lttng_create_tracepoint_event_notifier_if_missing(struct lttng_event_notifier_enabler *event_notifier_enabler) -{ - struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; - struct lttng_kernel_probe_desc *probe_desc; - const struct lttng_kernel_event_desc *desc; - int i; - struct list_head *probe_list; - - probe_list = lttng_get_probe_list_head(); - /* - * For each probe event, if we find that a probe event matches - * our enabler, create an associated lttng_event_notifier if not - * already present. - */ - list_for_each_entry(probe_desc, probe_list, head) { - for (i = 0; i < probe_desc->nr_events; i++) { - int found = 0; - struct hlist_head *head; - struct lttng_event_notifier *event_notifier; - - desc = probe_desc->event_desc[i]; - if (!lttng_desc_match_enabler(desc, - lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) - continue; - - /* - * 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); - lttng_hlist_for_each_entry(event_notifier, head, hlist) { - if (event_notifier->desc == desc - && event_notifier->user_token == event_notifier_enabler->base.user_token) - found = 1; - } - if (found) - continue; - - /* - * We need to create a event_notifier for this event probe. - */ - event_notifier = _lttng_event_notifier_create(desc, - event_notifier_enabler->base.user_token, - event_notifier_enabler->error_counter_index, - event_notifier_group, NULL, NULL, - LTTNG_KERNEL_ABI_TRACEPOINT); - 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_enabler *event_enabler) -{ - int ret; - - ret = lttng_syscalls_register_event(event_enabler, NULL); - WARN_ON_ONCE(ret); -} - -static -void lttng_create_syscall_event_notifier_if_missing(struct lttng_event_notifier_enabler *event_notifier_enabler) +void lttng_create_syscall_event_if_missing(struct lttng_event_enabler_common *event_enabler) { int ret; - ret = lttng_syscalls_register_event_notifier(event_notifier_enabler, NULL); - WARN_ON_ONCE(ret); - ret = lttng_syscals_create_matching_event_notifiers(event_notifier_enabler, NULL); + ret = lttng_syscalls_register_event(event_enabler); WARN_ON_ONCE(ret); } /* - * Create struct lttng_event if it is missing and present in the list of - * tracepoint probes. + * Create event if it is missing and present in the list of tracepoint probes. * Should be called with sessions mutex held. */ static -void lttng_create_event_if_missing(struct lttng_event_enabler *event_enabler) +void lttng_create_event_if_missing(struct lttng_event_enabler_common *event_enabler) { - switch (event_enabler->base.event_param.instrumentation) { + switch (event_enabler->event_param.instrumentation) { case LTTNG_KERNEL_ABI_TRACEPOINT: lttng_create_tracepoint_event_if_missing(event_enabler); break; @@ -2173,132 +2221,66 @@ void lttng_create_event_if_missing(struct lttng_event_enabler *event_enabler) } } -/* - * Create events associated with an event_enabler (if not already present), - * and add backward reference from the event to the enabler. - * Should be called with sessions mutex held. - */ static -int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler) +void lttng_event_enabler_init_event_filter(struct lttng_event_enabler_common *event_enabler, + struct lttng_kernel_event_common *event) { - struct lttng_channel *chan = event_enabler->chan; - struct lttng_session *session = event_enabler->chan->session; - struct lttng_enabler *base_enabler = lttng_event_enabler_as_enabler(event_enabler); - struct lttng_event *event; - - if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_ABI_SYSCALL && - base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL && - base_enabler->event_param.u.syscall.match == LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME && - !strcmp(base_enabler->event_param.name, "*")) { - int enabled = base_enabler->enabled; - enum lttng_kernel_abi_syscall_entryexit entryexit = base_enabler->event_param.u.syscall.entryexit; - - if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRY || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) - WRITE_ONCE(chan->syscall_all_entry, enabled); - - if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) - WRITE_ONCE(chan->syscall_all_exit, enabled); - } - - /* First ensure that probe events are created for this enabler. */ - lttng_create_event_if_missing(event_enabler); - - /* For each event matching event_enabler in session event list. */ - list_for_each_entry(event, &session->events, list) { - struct lttng_enabler_ref *enabler_ref; - - if (!lttng_event_enabler_match_event(event_enabler, event)) - continue; - enabler_ref = lttng_enabler_ref(&event->enablers_ref_head, - lttng_event_enabler_as_enabler(event_enabler)); - if (!enabler_ref) { - /* - * If no backward ref, create it. - * Add backward ref from event to event_enabler. - */ - enabler_ref = kzalloc(sizeof(*enabler_ref), GFP_KERNEL); - if (!enabler_ref) - return -ENOMEM; - enabler_ref->ref = lttng_event_enabler_as_enabler(event_enabler); - list_add(&enabler_ref->node, - &event->enablers_ref_head); - } - - /* - * Link filter bytecodes if not linked yet. - */ - lttng_enabler_link_bytecode(event->desc, - lttng_static_ctx, - &event->filter_bytecode_runtime_head, - <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); - - /* TODO: merge event context. */ - } - return 0; + /* Link filter bytecodes if not linked yet. */ + lttng_enabler_link_bytecode(event->priv->desc, lttng_static_ctx, + &event->priv->filter_bytecode_runtime_head, &event_enabler->filter_bytecode_head); } -/* - * Create struct lttng_event_notifier if it is missing and present in the list of - * tracepoint probes. - * Should be called with sessions mutex held. - */ static -void lttng_create_event_notifier_if_missing(struct lttng_event_notifier_enabler *event_notifier_enabler) +void lttng_event_enabler_init_event_capture(struct lttng_event_enabler_common *event_enabler, + struct lttng_kernel_event_common *event) { - switch (event_notifier_enabler->base.event_param.instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: - lttng_create_tracepoint_event_notifier_if_missing(event_notifier_enabler); + switch (event_enabler->enabler_type) { + case LTTNG_EVENT_ENABLER_TYPE_RECORDER: break; + case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: + { + struct lttng_event_notifier_enabler *event_notifier_enabler = + container_of(event_enabler, struct lttng_event_notifier_enabler, parent); + struct lttng_kernel_event_notifier *event_notifier = + container_of(event, struct lttng_kernel_event_notifier, parent); - case LTTNG_KERNEL_ABI_SYSCALL: - lttng_create_syscall_event_notifier_if_missing(event_notifier_enabler); + /* Link capture bytecodes if not linked yet. */ + lttng_enabler_link_bytecode(event->priv->desc, + lttng_static_ctx, &event_notifier->priv->capture_bytecode_runtime_head, + &event_notifier_enabler->capture_bytecode_head); + event_notifier->priv->num_captures = event_notifier_enabler->num_captures; break; - + } default: WARN_ON_ONCE(1); - break; } } /* - * Create event_notifiers associated with a event_notifier enabler (if not already present). + * Create events associated with an event_enabler (if not already present), + * and add backward reference from the event to the enabler. + * Should be called with sessions mutex held. */ static -int lttng_event_notifier_enabler_ref_event_notifiers( - struct lttng_event_notifier_enabler *event_notifier_enabler) +int lttng_event_enabler_ref_events(struct lttng_event_enabler_common *event_enabler) { - struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; - struct lttng_enabler *base_enabler = lttng_event_notifier_enabler_as_enabler(event_notifier_enabler); - struct lttng_event_notifier *event_notifier; - - if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_ABI_SYSCALL && - base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL && - base_enabler->event_param.u.syscall.match == LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME && - !strcmp(base_enabler->event_param.name, "*")) { - - int enabled = base_enabler->enabled; - enum lttng_kernel_abi_syscall_entryexit entryexit = base_enabler->event_param.u.syscall.entryexit; - - if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRY || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) - WRITE_ONCE(event_notifier_group->syscall_all_entry, enabled); + struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(event_enabler); + struct lttng_kernel_event_common_private *event_priv; - if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) - WRITE_ONCE(event_notifier_group->syscall_all_exit, enabled); + lttng_syscall_table_set_wildcard_all(event_enabler); - } - - /* First ensure that probe event_notifiers are created for this enabler. */ - lttng_create_event_notifier_if_missing(event_notifier_enabler); + /* First ensure that probe events are created for this enabler. */ + lttng_create_event_if_missing(event_enabler); - /* Link the created event_notifier with its associated enabler. */ - list_for_each_entry(event_notifier, &event_notifier_group->event_notifiers_head, list) { + /* Link the created event with its associated enabler. */ + list_for_each_entry(event_priv, event_list_head, node) { + struct lttng_kernel_event_common *event = event_priv->pub; struct lttng_enabler_ref *enabler_ref; - if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier)) + if (!lttng_event_enabler_match_event(event_enabler, event)) continue; - enabler_ref = lttng_enabler_ref(&event_notifier->enablers_ref_head, - lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); + enabler_ref = lttng_enabler_ref(&event_priv->enablers_ref_head, event_enabler); if (!enabler_ref) { /* * If no backward ref, create it. @@ -2308,25 +2290,12 @@ int lttng_event_notifier_enabler_ref_event_notifiers( if (!enabler_ref) return -ENOMEM; - enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( - event_notifier_enabler); - list_add(&enabler_ref->node, - &event_notifier->enablers_ref_head); + enabler_ref->ref = event_enabler; + list_add(&enabler_ref->node, &event_priv->enablers_ref_head); } - /* - * Link filter bytecodes if not linked yet. - */ - lttng_enabler_link_bytecode(event_notifier->desc, - lttng_static_ctx, &event_notifier->filter_bytecode_runtime_head, - <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); - - /* Link capture bytecodes if not linked yet. */ - lttng_enabler_link_bytecode(event_notifier->desc, - lttng_static_ctx, &event_notifier->capture_bytecode_runtime_head, - &event_notifier_enabler->capture_bytecode_head); - - event_notifier->num_captures = event_notifier_enabler->num_captures; + lttng_event_enabler_init_event_filter(event_enabler, event); + lttng_event_enabler_init_event_capture(event_enabler, event); } return 0; } @@ -2338,21 +2307,20 @@ int lttng_event_notifier_enabler_ref_event_notifiers( */ int lttng_fix_pending_events(void) { - struct lttng_session *session; + struct lttng_kernel_session_private *session_priv; - list_for_each_entry(session, &sessions, list) - lttng_session_lazy_sync_event_enablers(session); + list_for_each_entry(session_priv, &sessions, list) + lttng_session_lazy_sync_event_enablers(session_priv->pub); return 0; } static bool lttng_event_notifier_group_has_active_event_notifiers( struct lttng_event_notifier_group *event_notifier_group) { - struct lttng_event_notifier_enabler *event_notifier_enabler; + struct lttng_event_enabler_common *event_enabler; - list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, - node) { - if (event_notifier_enabler->base.enabled) + list_for_each_entry(event_enabler, &event_notifier_group->enablers_head, node) { + if (event_enabler->enabled) return true; } return false; @@ -2378,53 +2346,60 @@ int lttng_fix_pending_event_notifiers(void) return 0; } -struct lttng_event_enabler *lttng_event_enabler_create( +struct lttng_event_recorder_enabler *lttng_event_recorder_enabler_create( enum lttng_enabler_format_type format_type, struct lttng_kernel_abi_event *event_param, - struct lttng_channel *chan) + struct lttng_kernel_channel_buffer *chan) { - struct lttng_event_enabler *event_enabler; + struct lttng_event_recorder_enabler *event_enabler; event_enabler = kzalloc(sizeof(*event_enabler), GFP_KERNEL); if (!event_enabler) return NULL; - event_enabler->base.format_type = format_type; - INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); - memcpy(&event_enabler->base.event_param, event_param, - sizeof(event_enabler->base.event_param)); + event_enabler->parent.enabler_type = LTTNG_EVENT_ENABLER_TYPE_RECORDER; + event_enabler->parent.format_type = format_type; + INIT_LIST_HEAD(&event_enabler->parent.filter_bytecode_head); + memcpy(&event_enabler->parent.event_param, event_param, + sizeof(event_enabler->parent.event_param)); event_enabler->chan = chan; /* ctx left NULL */ - event_enabler->base.enabled = 0; + event_enabler->parent.enabled = 0; + return event_enabler; +} + +void lttng_event_enabler_session_add(struct lttng_kernel_session *session, + struct lttng_event_recorder_enabler *event_enabler) +{ mutex_lock(&sessions_mutex); - list_add(&event_enabler->node, &event_enabler->chan->session->enablers_head); - lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); + list_add(&event_enabler->parent.node, &session->priv->enablers_head); + event_enabler->parent.published = true; + lttng_session_lazy_sync_event_enablers(session); mutex_unlock(&sessions_mutex); - return event_enabler; } -int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) +int lttng_event_enabler_enable(struct lttng_event_enabler_common *event_enabler) { mutex_lock(&sessions_mutex); - lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; - lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); + event_enabler->enabled = 1; + lttng_event_enabler_sync(event_enabler); mutex_unlock(&sessions_mutex); return 0; } -int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) +int lttng_event_enabler_disable(struct lttng_event_enabler_common *event_enabler) { mutex_lock(&sessions_mutex); - lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; - lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); + event_enabler->enabled = 0; + lttng_event_enabler_sync(event_enabler); mutex_unlock(&sessions_mutex); return 0; } static -int lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, +int lttng_enabler_attach_filter_bytecode(struct lttng_event_enabler_common *enabler, struct lttng_kernel_abi_filter_bytecode __user *bytecode) { - struct lttng_bytecode_node *bytecode_node; + struct lttng_kernel_bytecode_node *bytecode_node; uint32_t bytecode_len; int ret; @@ -2440,7 +2415,7 @@ int lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, if (ret) goto error_free; - bytecode_node->type = LTTNG_BYTECODE_NODE_TYPE_FILTER; + bytecode_node->type = LTTNG_KERNEL_BYTECODE_TYPE_FILTER; bytecode_node->enabler = enabler; /* Enforce length based on allocated size */ bytecode_node->bc.len = bytecode_len; @@ -2453,27 +2428,25 @@ error_free: return ret; } -int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, +int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler_common *event_enabler, struct lttng_kernel_abi_filter_bytecode __user *bytecode) { int ret; - ret = lttng_enabler_attach_filter_bytecode( - lttng_event_enabler_as_enabler(event_enabler), bytecode); + ret = lttng_enabler_attach_filter_bytecode(event_enabler, bytecode); if (ret) goto error; - - lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); + lttng_event_enabler_sync(event_enabler); return 0; error: return ret; } -int lttng_event_add_callsite(struct lttng_event *event, +int lttng_event_add_callsite(struct lttng_kernel_event_common *event, struct lttng_kernel_abi_event_callsite __user *callsite) { - switch (event->instrumentation) { + switch (event->priv->instrumentation) { case LTTNG_KERNEL_ABI_UPROBE: return lttng_uprobes_event_add_callsite(event, callsite); default: @@ -2482,9 +2455,9 @@ int lttng_event_add_callsite(struct lttng_event *event, } static -void lttng_enabler_destroy(struct lttng_enabler *enabler) +void lttng_enabler_destroy(struct lttng_event_enabler_common *enabler) { - struct lttng_bytecode_node *filter_node, *tmp_filter_node; + struct lttng_kernel_bytecode_node *filter_node, *tmp_filter_node; /* Destroy filter bytecode */ list_for_each_entry_safe(filter_node, tmp_filter_node, @@ -2493,22 +2466,38 @@ void lttng_enabler_destroy(struct lttng_enabler *enabler) } } -static -void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) +void lttng_event_enabler_destroy(struct lttng_event_enabler_common *event_enabler) { - lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); + lttng_enabler_destroy(event_enabler); + if (event_enabler->published) + list_del(&event_enabler->node); + + 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); - /* Destroy contexts */ - lttng_kernel_destroy_context(event_enabler->ctx); + kfree(event_recorder_enabler); + break; + } + case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: + { + struct lttng_event_notifier_enabler *event_notifier_enabler = + container_of(event_enabler, struct lttng_event_notifier_enabler, parent); - list_del(&event_enabler->node); - kfree(event_enabler); + kfree(event_notifier_enabler); + break; + } + default: + WARN_ON_ONCE(1); + } } 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; @@ -2516,27 +2505,31 @@ struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( if (!event_notifier_enabler) return NULL; - event_notifier_enabler->base.format_type = format_type; - INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); + event_notifier_enabler->parent.enabler_type = LTTNG_EVENT_ENABLER_TYPE_NOTIFIER; + event_notifier_enabler->parent.format_type = format_type; + INIT_LIST_HEAD(&event_notifier_enabler->parent.filter_bytecode_head); INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; event_notifier_enabler->num_captures = 0; - memcpy(&event_notifier_enabler->base.event_param, &event_notifier_param->event, - sizeof(event_notifier_enabler->base.event_param)); + memcpy(&event_notifier_enabler->parent.event_param, &event_notifier_param->event, + sizeof(event_notifier_enabler->parent.event_param)); - event_notifier_enabler->base.enabled = 0; - event_notifier_enabler->base.user_token = event_notifier_param->event.token; + 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); + list_add(&event_notifier_enabler->parent.node, &event_notifier_enabler->group->enablers_head); + event_notifier_enabler->parent.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( @@ -2559,31 +2552,12 @@ int lttng_event_notifier_enabler_disable( return 0; } -int lttng_event_notifier_enabler_attach_filter_bytecode( - struct lttng_event_notifier_enabler *event_notifier_enabler, - struct lttng_kernel_abi_filter_bytecode __user *bytecode) -{ - int ret; - - ret = lttng_enabler_attach_filter_bytecode( - lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), - bytecode); - if (ret) - goto error; - - lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); - return 0; - -error: - return ret; -} - int lttng_event_notifier_enabler_attach_capture_bytecode( struct lttng_event_notifier_enabler *event_notifier_enabler, struct lttng_kernel_abi_capture_bytecode __user *bytecode) { - struct lttng_bytecode_node *bytecode_node; - struct lttng_enabler *enabler = + struct lttng_kernel_bytecode_node *bytecode_node; + struct lttng_event_enabler_common *enabler = lttng_event_notifier_enabler_as_enabler(event_notifier_enabler); uint32_t bytecode_len; int ret; @@ -2602,7 +2576,7 @@ int lttng_event_notifier_enabler_attach_capture_bytecode( if (ret) goto error_free; - bytecode_node->type = LTTNG_BYTECODE_NODE_TYPE_CAPTURE; + bytecode_node->type = LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE; bytecode_node->enabler = enabler; /* Enforce length based on allocated size */ @@ -2620,31 +2594,55 @@ end: return ret; } -int lttng_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier, - struct lttng_kernel_abi_event_callsite __user *callsite) +static +void lttng_event_sync_filter_state(struct lttng_kernel_event_common *event) { + int has_enablers_without_filter_bytecode = 0, nr_filters = 0; + struct lttng_kernel_bytecode_runtime *runtime; + struct lttng_enabler_ref *enabler_ref; - switch (event_notifier->instrumentation) { - case LTTNG_KERNEL_ABI_UPROBE: - return lttng_uprobes_event_notifier_add_callsite(event_notifier, - callsite); - default: - return -EINVAL; + /* Check if has enablers without bytecode enabled */ + list_for_each_entry(enabler_ref, &event->priv->enablers_ref_head, node) { + if (enabler_ref->ref->enabled + && list_empty(&enabler_ref->ref->filter_bytecode_head)) { + has_enablers_without_filter_bytecode = 1; + break; + } + } + event->priv->has_enablers_without_filter_bytecode = has_enablers_without_filter_bytecode; + + /* Enable filters */ + list_for_each_entry(runtime, &event->priv->filter_bytecode_runtime_head, node) { + lttng_bytecode_sync_state(runtime); + nr_filters++; } + WRITE_ONCE(event->eval_filter, !(has_enablers_without_filter_bytecode || !nr_filters)); } static -void lttng_event_notifier_enabler_destroy( - struct lttng_event_notifier_enabler *event_notifier_enabler) +void lttng_event_sync_capture_state(struct lttng_kernel_event_common *event) { - if (!event_notifier_enabler) { - return; - } - - list_del(&event_notifier_enabler->node); + switch (event->type) { + case LTTNG_KERNEL_EVENT_TYPE_RECORDER: + break; + case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: + { + struct lttng_kernel_event_notifier *event_notifier = + container_of(event, struct lttng_kernel_event_notifier, parent); + struct lttng_kernel_bytecode_runtime *runtime; + int nr_captures = 0; - lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); - kfree(event_notifier_enabler); + /* Enable captures */ + list_for_each_entry(runtime, &event_notifier->priv->capture_bytecode_runtime_head, node) { + lttng_bytecode_sync_state(runtime); + nr_captures++; + } + WRITE_ONCE(event_notifier->eval_capture, !!nr_captures); + break; + } + default: + WARN_ON_ONCE(1); + } } /* @@ -2653,29 +2651,30 @@ void lttng_event_notifier_enabler_destroy( * Should be called with sessions mutex held. */ static -void lttng_session_sync_event_enablers(struct lttng_session *session) +void lttng_session_sync_event_enablers(struct lttng_kernel_session *session) { - struct lttng_event_enabler *event_enabler; - struct lttng_event *event; + struct lttng_event_enabler_common *event_enabler; + struct lttng_kernel_event_recorder_private *event_recorder_priv; - list_for_each_entry(event_enabler, &session->enablers_head, node) + list_for_each_entry(event_enabler, &session->priv->enablers_head, node) lttng_event_enabler_ref_events(event_enabler); /* * For each event, if at least one of its enablers is enabled, * and its channel and session transient states are enabled, we * enable the event, else we disable it. */ - list_for_each_entry(event, &session->events, list) { + list_for_each_entry(event_recorder_priv, &session->priv->events, parent.node) { + struct lttng_kernel_event_recorder *event_recorder = event_recorder_priv->pub; struct lttng_enabler_ref *enabler_ref; - struct lttng_bytecode_runtime *runtime; - int enabled = 0, has_enablers_without_bytecode = 0; + int enabled = 0; - switch (event->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: /* Fall-through */ + switch (event_recorder_priv->parent.instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_fallthrough; case LTTNG_KERNEL_ABI_SYSCALL: /* Enable events */ list_for_each_entry(enabler_ref, - &event->enablers_ref_head, node) { + &event_recorder_priv->parent.enablers_ref_head, node) { if (enabler_ref->ref->enabled) { enabled = 1; break; @@ -2692,35 +2691,20 @@ void lttng_session_sync_event_enablers(struct lttng_session *session) * intesection of session and channel transient enable * states. */ - enabled = enabled && session->tstate && event->chan->tstate; + enabled = enabled && session->priv->tstate && event_recorder->chan->priv->parent.tstate; - WRITE_ONCE(event->enabled, enabled); + WRITE_ONCE(event_recorder->parent.enabled, enabled); /* * Sync tracepoint registration with event enabled * state. */ if (enabled) { - register_event(event); + register_event(&event_recorder->parent); } else { - _lttng_event_unregister(event); + _lttng_event_unregister(&event_recorder->parent); } - /* Check if has enablers without bytecode enabled */ - list_for_each_entry(enabler_ref, - &event->enablers_ref_head, node) { - if (enabler_ref->ref->enabled - && list_empty(&enabler_ref->ref->filter_bytecode_head)) { - has_enablers_without_bytecode = 1; - break; - } - } - event->has_enablers_without_bytecode = - has_enablers_without_bytecode; - - /* Enable filters */ - list_for_each_entry(runtime, - &event->filter_bytecode_runtime_head, node) - lttng_bytecode_filter_sync_state(runtime); + lttng_event_sync_filter_state(&event_recorder_priv->pub->parent); } } @@ -2732,7 +2716,7 @@ void lttng_session_sync_event_enablers(struct lttng_session *session) * Should be called with sessions mutex held. */ static -void lttng_session_lazy_sync_event_enablers(struct lttng_session *session) +void lttng_session_lazy_sync_event_enablers(struct lttng_kernel_session *session) { /* We can skip if session is not active */ if (!session->active) @@ -2743,27 +2727,28 @@ void lttng_session_lazy_sync_event_enablers(struct lttng_session *session) static void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) { - struct lttng_event_notifier_enabler *event_notifier_enabler; - struct lttng_event_notifier *event_notifier; + struct lttng_event_enabler_common *event_enabler; + struct lttng_kernel_event_notifier_private *event_notifier_priv; - list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) - lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); + list_for_each_entry(event_enabler, &event_notifier_group->enablers_head, node) + lttng_event_enabler_ref_events(event_enabler); /* * For each event_notifier, if at least one of its enablers is enabled, * we enable the event_notifier, else we disable it. */ - list_for_each_entry(event_notifier, &event_notifier_group->event_notifiers_head, list) { + list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, parent.node) { + struct lttng_kernel_event_notifier *event_notifier = event_notifier_priv->pub; struct lttng_enabler_ref *enabler_ref; - struct lttng_bytecode_runtime *runtime; - int enabled = 0, has_enablers_without_bytecode = 0; + int enabled = 0; - switch (event_notifier->instrumentation) { - case LTTNG_KERNEL_ABI_TRACEPOINT: /* Fall-through */ + switch (event_notifier_priv->parent.instrumentation) { + case LTTNG_KERNEL_ABI_TRACEPOINT: + lttng_fallthrough; case LTTNG_KERNEL_ABI_SYSCALL: /* Enable event_notifiers */ list_for_each_entry(enabler_ref, - &event_notifier->enablers_ref_head, node) { + &event_notifier_priv->parent.enablers_ref_head, node) { if (enabler_ref->ref->enabled) { enabled = 1; break; @@ -2776,42 +2761,44 @@ void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group continue; } - WRITE_ONCE(event_notifier->enabled, enabled); + WRITE_ONCE(event_notifier->parent.enabled, enabled); /* * Sync tracepoint registration with event_notifier enabled * state. */ if (enabled) { - if (!event_notifier->registered) - register_event_notifier(event_notifier); + if (!event_notifier_priv->parent.registered) + register_event(&event_notifier->parent); } else { - if (event_notifier->registered) - _lttng_event_notifier_unregister(event_notifier); - } - - /* Check if has enablers without bytecode enabled */ - list_for_each_entry(enabler_ref, - &event_notifier->enablers_ref_head, node) { - if (enabler_ref->ref->enabled - && list_empty(&enabler_ref->ref->filter_bytecode_head)) { - has_enablers_without_bytecode = 1; - break; - } + if (event_notifier_priv->parent.registered) + _lttng_event_unregister(&event_notifier->parent); } - event_notifier->has_enablers_without_bytecode = - has_enablers_without_bytecode; - /* Enable filters */ - list_for_each_entry(runtime, - &event_notifier->filter_bytecode_runtime_head, node) - lttng_bytecode_filter_sync_state(runtime); - - /* Enable captures */ - list_for_each_entry(runtime, - &event_notifier->capture_bytecode_runtime_head, node) - lttng_bytecode_capture_sync_state(runtime); + lttng_event_sync_filter_state(&event_notifier_priv->pub->parent); + lttng_event_sync_capture_state(&event_notifier_priv->pub->parent); + } +} - WRITE_ONCE(event_notifier->eval_capture, !!event_notifier->num_captures); +static +void lttng_event_enabler_sync(struct lttng_event_enabler_common *event_enabler) +{ + 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); + lttng_session_lazy_sync_event_enablers(event_recorder_enabler->chan->parent.session); + break; + } + case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: + { + struct lttng_event_notifier_enabler *event_notifier_enabler = + container_of(event_enabler, struct lttng_event_notifier_enabler, parent); + lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); + break; + } + default: + WARN_ON_ONCE(1); } } @@ -2828,9 +2815,9 @@ void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group * was written and a negative value on error. */ int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, - struct channel *chan, bool *coherent) + struct lttng_kernel_ring_buffer_channel *chan, bool *coherent) { - struct lib_ring_buffer_ctx ctx; + struct lttng_kernel_ring_buffer_ctx ctx; int ret = 0; size_t len, reserve_len; @@ -2857,14 +2844,14 @@ int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, if (!len) goto end; reserve_len = min_t(size_t, - stream->transport->ops.packet_avail_size(chan), + stream->transport->ops.priv->packet_avail_size(chan), len); - lib_ring_buffer_ctx_init(&ctx, chan, NULL, reserve_len, - sizeof(char), -1); + lib_ring_buffer_ctx_init(&ctx, chan, reserve_len, + sizeof(char), NULL); /* * If reservation failed, return an error to the caller. */ - ret = stream->transport->ops.event_reserve(&ctx, 0); + ret = stream->transport->ops.event_reserve(&ctx); if (ret != 0) { printk(KERN_WARNING "LTTng: Metadata event reservation failed\n"); stream->coherent = false; @@ -2872,7 +2859,7 @@ int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, } stream->transport->ops.event_write(&ctx, stream->metadata_cache->data + stream->metadata_in, - reserve_len); + reserve_len, 1); stream->transport->ops.event_commit(&ctx); stream->metadata_in += reserve_len; if (reserve_len < len) @@ -2889,22 +2876,22 @@ end: } static -void lttng_metadata_begin(struct lttng_session *session) +void lttng_metadata_begin(struct lttng_kernel_session *session) { - if (atomic_inc_return(&session->metadata_cache->producing) == 1) - mutex_lock(&session->metadata_cache->lock); + if (atomic_inc_return(&session->priv->metadata_cache->producing) == 1) + mutex_lock(&session->priv->metadata_cache->lock); } static -void lttng_metadata_end(struct lttng_session *session) +void lttng_metadata_end(struct lttng_kernel_session *session) { - WARN_ON_ONCE(!atomic_read(&session->metadata_cache->producing)); - if (atomic_dec_return(&session->metadata_cache->producing) == 0) { + WARN_ON_ONCE(!atomic_read(&session->priv->metadata_cache->producing)); + if (atomic_dec_return(&session->priv->metadata_cache->producing) == 0) { struct lttng_metadata_stream *stream; - list_for_each_entry(stream, &session->metadata_cache->metadata_stream, list) + list_for_each_entry(stream, &session->priv->metadata_cache->metadata_stream, list) wake_up_interruptible(&stream->read_wait); - mutex_unlock(&session->metadata_cache->lock); + mutex_unlock(&session->priv->metadata_cache->lock); } } @@ -2916,7 +2903,7 @@ void lttng_metadata_end(struct lttng_session *session) * The content of the printf is printed as a single atomic metadata * transaction. */ -int lttng_metadata_printf(struct lttng_session *session, +int lttng_metadata_printf(struct lttng_kernel_session *session, const char *fmt, ...) { char *str; @@ -2932,32 +2919,32 @@ int lttng_metadata_printf(struct lttng_session *session, return -ENOMEM; len = strlen(str); - WARN_ON_ONCE(!atomic_read(&session->metadata_cache->producing)); - if (session->metadata_cache->metadata_written + len > - session->metadata_cache->cache_alloc) { + WARN_ON_ONCE(!atomic_read(&session->priv->metadata_cache->producing)); + if (session->priv->metadata_cache->metadata_written + len > + session->priv->metadata_cache->cache_alloc) { char *tmp_cache_realloc; unsigned int tmp_cache_alloc_size; tmp_cache_alloc_size = max_t(unsigned int, - session->metadata_cache->cache_alloc + len, - session->metadata_cache->cache_alloc << 1); + session->priv->metadata_cache->cache_alloc + len, + session->priv->metadata_cache->cache_alloc << 1); tmp_cache_realloc = vzalloc(tmp_cache_alloc_size); if (!tmp_cache_realloc) goto err; - if (session->metadata_cache->data) { + if (session->priv->metadata_cache->data) { memcpy(tmp_cache_realloc, - session->metadata_cache->data, - session->metadata_cache->cache_alloc); - vfree(session->metadata_cache->data); + session->priv->metadata_cache->data, + session->priv->metadata_cache->cache_alloc); + vfree(session->priv->metadata_cache->data); } - session->metadata_cache->cache_alloc = tmp_cache_alloc_size; - session->metadata_cache->data = tmp_cache_realloc; + session->priv->metadata_cache->cache_alloc = tmp_cache_alloc_size; + session->priv->metadata_cache->data = tmp_cache_realloc; } - memcpy(session->metadata_cache->data + - session->metadata_cache->metadata_written, + memcpy(session->priv->metadata_cache->data + + session->priv->metadata_cache->metadata_written, str, len); - session->metadata_cache->metadata_written += len; + session->priv->metadata_cache->metadata_written += len; kfree(str); return 0; @@ -2968,7 +2955,7 @@ err: } static -int print_tabs(struct lttng_session *session, size_t nesting) +int print_tabs(struct lttng_kernel_session *session, size_t nesting) { size_t i; @@ -2984,7 +2971,7 @@ int print_tabs(struct lttng_session *session, size_t nesting) } static -int lttng_field_name_statedump(struct lttng_session *session, +int lttng_field_name_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, size_t nesting) { @@ -2992,7 +2979,7 @@ int lttng_field_name_statedump(struct lttng_session *session, } static -int _lttng_integer_type_statedump(struct lttng_session *session, +int _lttng_integer_type_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_type_integer *type, enum lttng_kernel_string_encoding parent_encoding, size_t nesting) @@ -3026,10 +3013,11 @@ int _lttng_integer_type_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_struct_type_statedump(struct lttng_session *session, +int _lttng_struct_type_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_type_struct *type, size_t nesting) { + const char *prev_field_name = NULL; int ret; uint32_t i, nr_fields; unsigned int alignment; @@ -3046,7 +3034,7 @@ int _lttng_struct_type_statedump(struct lttng_session *session, const struct lttng_kernel_event_field *iter_field; iter_field = type->fields[i]; - ret = _lttng_field_statedump(session, iter_field, nesting + 1); + ret = _lttng_field_statedump(session, iter_field, nesting + 1, &prev_field_name); if (ret) return ret; } @@ -3069,7 +3057,7 @@ int _lttng_struct_type_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_struct_field_statedump(struct lttng_session *session, +int _lttng_struct_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, size_t nesting) { @@ -3086,13 +3074,20 @@ int _lttng_struct_field_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_variant_type_statedump(struct lttng_session *session, +int _lttng_variant_type_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_type_variant *type, - size_t nesting) + size_t nesting, + const char *prev_field_name) { + const char *tag_name; int ret; uint32_t i, nr_choices; + tag_name = type->tag_name; + if (!tag_name) + tag_name = prev_field_name; + if (!tag_name) + return -EINVAL; /* * CTF 1.8 does not allow expressing nonzero variant alignment in a nestable way. */ @@ -3103,7 +3098,7 @@ int _lttng_variant_type_statedump(struct lttng_session *session, return ret; ret = lttng_metadata_printf(session, "variant <_%s> {\n", - type->tag_name); + tag_name); if (ret) return ret; nr_choices = type->nr_choices; @@ -3111,7 +3106,7 @@ int _lttng_variant_type_statedump(struct lttng_session *session, const struct lttng_kernel_event_field *iter_field; iter_field = type->choices[i]; - ret = _lttng_field_statedump(session, iter_field, nesting + 1); + ret = _lttng_field_statedump(session, iter_field, nesting + 1, NULL); if (ret) return ret; } @@ -3127,14 +3122,16 @@ int _lttng_variant_type_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_variant_field_statedump(struct lttng_session *session, +int _lttng_variant_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, - size_t nesting) + size_t nesting, + const char *prev_field_name) { int ret; ret = _lttng_variant_type_statedump(session, - lttng_kernel_get_type_variant(field->type), nesting); + lttng_kernel_get_type_variant(field->type), nesting, + prev_field_name); if (ret) return ret; return lttng_field_name_statedump(session, field, nesting); @@ -3144,7 +3141,7 @@ int _lttng_variant_field_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_array_field_statedump(struct lttng_session *session, +int _lttng_array_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, size_t nesting) { @@ -3195,9 +3192,10 @@ int _lttng_array_field_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_sequence_field_statedump(struct lttng_session *session, +int _lttng_sequence_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, - size_t nesting) + size_t nesting, + const char *prev_field_name) { int ret; const char *length_name; @@ -3208,6 +3206,10 @@ int _lttng_sequence_field_statedump(struct lttng_session *session, WARN_ON_ONCE(!sequence_type); length_name = sequence_type->length_name; + if (!length_name) + length_name = prev_field_name; + if (!length_name) + return -EINVAL; if (sequence_type->alignment) { ret = print_tabs(session, nesting); @@ -3242,7 +3244,7 @@ int _lttng_sequence_field_statedump(struct lttng_session *session, ret = lttng_metadata_printf(session, " _%s[ _%s ];\n", field->name, - sequence_type->length_name); + length_name); return ret; } @@ -3250,7 +3252,7 @@ int _lttng_sequence_field_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_enum_type_statedump(struct lttng_session *session, +int _lttng_enum_type_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_type_enum *type, size_t nesting) { @@ -3367,7 +3369,7 @@ end: * Must be called with sessions_mutex held. */ static -int _lttng_enum_field_statedump(struct lttng_session *session, +int _lttng_enum_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, size_t nesting) { @@ -3383,7 +3385,7 @@ int _lttng_enum_field_statedump(struct lttng_session *session, } static -int _lttng_integer_field_statedump(struct lttng_session *session, +int _lttng_integer_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, size_t nesting) { @@ -3397,7 +3399,7 @@ int _lttng_integer_field_statedump(struct lttng_session *session, } static -int _lttng_string_type_statedump(struct lttng_session *session, +int _lttng_string_type_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_type_string *type, size_t nesting) { @@ -3415,7 +3417,7 @@ int _lttng_string_type_statedump(struct lttng_session *session, } static -int _lttng_string_field_statedump(struct lttng_session *session, +int _lttng_string_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, size_t nesting) { @@ -3434,7 +3436,7 @@ int _lttng_string_field_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_type_statedump(struct lttng_session *session, +int _lttng_type_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_type_common *type, enum lttng_kernel_string_encoding parent_encoding, size_t nesting) @@ -3465,7 +3467,7 @@ int _lttng_type_statedump(struct lttng_session *session, case lttng_kernel_type_variant: ret = _lttng_variant_type_statedump(session, lttng_kernel_get_type_variant(type), - nesting); + nesting, NULL); break; /* Nested arrays and sequences are not supported yet. */ @@ -3482,12 +3484,16 @@ int _lttng_type_statedump(struct lttng_session *session, * Must be called with sessions_mutex held. */ static -int _lttng_field_statedump(struct lttng_session *session, +int _lttng_field_statedump(struct lttng_kernel_session *session, const struct lttng_kernel_event_field *field, - size_t nesting) + size_t nesting, + const char **prev_field_name_p) { + const char *prev_field_name = NULL; int ret = 0; + if (prev_field_name_p) + prev_field_name = *prev_field_name_p; switch (field->type->type) { case lttng_kernel_type_integer: ret = _lttng_integer_field_statedump(session, field, nesting); @@ -3505,23 +3511,26 @@ int _lttng_field_statedump(struct lttng_session *session, ret = _lttng_array_field_statedump(session, field, nesting); break; case lttng_kernel_type_sequence: - ret = _lttng_sequence_field_statedump(session, field, nesting); + ret = _lttng_sequence_field_statedump(session, field, nesting, prev_field_name); break; case lttng_kernel_type_variant: - ret = _lttng_variant_field_statedump(session, field, nesting); + ret = _lttng_variant_field_statedump(session, field, nesting, prev_field_name); break; default: WARN_ON_ONCE(1); return -EINVAL; } + if (prev_field_name_p) + *prev_field_name_p = field->name; return ret; } static -int _lttng_context_metadata_statedump(struct lttng_session *session, +int _lttng_context_metadata_statedump(struct lttng_kernel_session *session, struct lttng_kernel_ctx *ctx) { + const char *prev_field_name = NULL; int ret = 0; int i; @@ -3530,7 +3539,7 @@ int _lttng_context_metadata_statedump(struct lttng_session *session, for (i = 0; i < ctx->nr_fields; i++) { const struct lttng_kernel_ctx_field *field = &ctx->fields[i]; - ret = _lttng_field_statedump(session, field->event_field, 2); + ret = _lttng_field_statedump(session, field->event_field, 2, &prev_field_name); if (ret) return ret; } @@ -3538,17 +3547,18 @@ int _lttng_context_metadata_statedump(struct lttng_session *session, } static -int _lttng_fields_metadata_statedump(struct lttng_session *session, - struct lttng_event *event) +int _lttng_fields_metadata_statedump(struct lttng_kernel_session *session, + struct lttng_kernel_event_recorder *event_recorder) { - const struct lttng_kernel_event_desc *desc = event->desc; + const char *prev_field_name = NULL; + const struct lttng_kernel_event_desc *desc = event_recorder->priv->parent.desc; int ret = 0; int i; - for (i = 0; i < desc->nr_fields; i++) { - const struct lttng_kernel_event_field *field = desc->fields[i]; + for (i = 0; i < desc->tp_class->nr_fields; i++) { + const struct lttng_kernel_event_field *field = desc->tp_class->fields[i]; - ret = _lttng_field_statedump(session, field, 2); + ret = _lttng_field_statedump(session, field, 2, &prev_field_name); if (ret) return ret; } @@ -3561,15 +3571,15 @@ int _lttng_fields_metadata_statedump(struct lttng_session *session, * transaction. */ static -int _lttng_event_metadata_statedump(struct lttng_session *session, - struct lttng_channel *chan, - struct lttng_event *event) +int _lttng_event_metadata_statedump(struct lttng_kernel_session *session, + struct lttng_kernel_channel_buffer *chan, + struct lttng_kernel_event_recorder *event_recorder) { int ret = 0; - if (event->metadata_dumped || !LTTNG_READ_ONCE(session->active)) + if (event_recorder->priv->metadata_dumped || !LTTNG_READ_ONCE(session->active)) return 0; - if (chan->channel_type == METADATA_CHANNEL) + if (chan->priv->channel_type == METADATA_CHANNEL) return 0; lttng_metadata_begin(session); @@ -3579,27 +3589,11 @@ int _lttng_event_metadata_statedump(struct lttng_session *session, " name = \"%s\";\n" " id = %u;\n" " stream_id = %u;\n", - event->desc->event_name, - event->id, - event->chan->id); - if (ret) - goto end; - - if (event->ctx) { - ret = lttng_metadata_printf(session, - " context := struct {\n"); - if (ret) - goto end; - } - ret = _lttng_context_metadata_statedump(session, event->ctx); + event_recorder->priv->parent.desc->event_name, + event_recorder->priv->id, + event_recorder->chan->priv->id); if (ret) goto end; - if (event->ctx) { - ret = lttng_metadata_printf(session, - " };\n"); - if (ret) - goto end; - } ret = lttng_metadata_printf(session, " fields := struct {\n" @@ -3607,7 +3601,7 @@ int _lttng_event_metadata_statedump(struct lttng_session *session, if (ret) goto end; - ret = _lttng_fields_metadata_statedump(session, event); + ret = _lttng_fields_metadata_statedump(session, event_recorder); if (ret) goto end; @@ -3621,7 +3615,7 @@ int _lttng_event_metadata_statedump(struct lttng_session *session, if (ret) goto end; - event->metadata_dumped = 1; + event_recorder->priv->metadata_dumped = 1; end: lttng_metadata_end(session); return ret; @@ -3634,41 +3628,41 @@ end: * transaction. */ static -int _lttng_channel_metadata_statedump(struct lttng_session *session, - struct lttng_channel *chan) +int _lttng_channel_metadata_statedump(struct lttng_kernel_session *session, + struct lttng_kernel_channel_buffer *chan) { int ret = 0; - if (chan->metadata_dumped || !LTTNG_READ_ONCE(session->active)) + if (chan->priv->metadata_dumped || !LTTNG_READ_ONCE(session->active)) return 0; - if (chan->channel_type == METADATA_CHANNEL) + if (chan->priv->channel_type == METADATA_CHANNEL) return 0; lttng_metadata_begin(session); - WARN_ON_ONCE(!chan->header_type); + WARN_ON_ONCE(!chan->priv->header_type); ret = lttng_metadata_printf(session, "stream {\n" " id = %u;\n" " event.header := %s;\n" " packet.context := struct packet_context;\n", - chan->id, - chan->header_type == 1 ? "struct event_header_compact" : + chan->priv->id, + chan->priv->header_type == 1 ? "struct event_header_compact" : "struct event_header_large"); if (ret) goto end; - if (chan->ctx) { + if (chan->priv->ctx) { ret = lttng_metadata_printf(session, " event.context := struct {\n"); if (ret) goto end; } - ret = _lttng_context_metadata_statedump(session, chan->ctx); + ret = _lttng_context_metadata_statedump(session, chan->priv->ctx); if (ret) goto end; - if (chan->ctx) { + if (chan->priv->ctx) { ret = lttng_metadata_printf(session, " };\n"); if (ret) @@ -3678,7 +3672,7 @@ int _lttng_channel_metadata_statedump(struct lttng_session *session, ret = lttng_metadata_printf(session, "};\n\n"); - chan->metadata_dumped = 1; + chan->priv->metadata_dumped = 1; end: lttng_metadata_end(session); return ret; @@ -3688,7 +3682,7 @@ end: * Must be called with sessions_mutex held. */ static -int _lttng_stream_packet_context_declare(struct lttng_session *session) +int _lttng_stream_packet_context_declare(struct lttng_kernel_session *session) { return lttng_metadata_printf(session, "struct packet_context {\n" @@ -3715,7 +3709,7 @@ int _lttng_stream_packet_context_declare(struct lttng_session *session) * Must be called with sessions_mutex held. */ static -int _lttng_event_header_declare(struct lttng_session *session) +int _lttng_event_header_declare(struct lttng_kernel_session *session) { return lttng_metadata_printf(session, "struct event_header_compact {\n" @@ -3798,7 +3792,7 @@ int64_t measure_clock_offset(void) } static -int print_escaped_ctf_string(struct lttng_session *session, const char *string) +int print_escaped_ctf_string(struct lttng_kernel_session *session, const char *string) { int ret = 0; size_t i; @@ -3817,7 +3811,7 @@ int print_escaped_ctf_string(struct lttng_session *session, const char *string) if (ret) goto error; /* We still print the current char */ - /* Fallthrough */ + lttng_fallthrough; default: ret = lttng_metadata_printf(session, "%c", cur); break; @@ -3833,7 +3827,7 @@ error: } static -int print_metadata_escaped_field(struct lttng_session *session, const char *field, +int print_metadata_escaped_field(struct lttng_kernel_session *session, const char *field, const char *field_value) { int ret; @@ -3857,13 +3851,13 @@ error: * Must be called with sessions_mutex held. */ static -int _lttng_session_metadata_statedump(struct lttng_session *session) +int _lttng_session_metadata_statedump(struct lttng_kernel_session *session) { - unsigned char *uuid_c = session->uuid.b; + unsigned char *uuid_c = session->priv->uuid.b; unsigned char uuid_s[37], clock_uuid_s[BOOT_ID_LEN]; const char *product_uuid; - struct lttng_channel *chan; - struct lttng_event *event; + struct lttng_kernel_channel_buffer_private *chan_priv; + struct lttng_kernel_event_recorder_private *event_recorder_priv; int ret = 0; if (!LTTNG_READ_ONCE(session->active)) @@ -3871,7 +3865,7 @@ int _lttng_session_metadata_statedump(struct lttng_session *session) lttng_metadata_begin(session); - if (session->metadata_dumped) + if (session->priv->metadata_dumped) goto skip_session; snprintf(uuid_s, sizeof(uuid_s), @@ -3943,11 +3937,11 @@ int _lttng_session_metadata_statedump(struct lttng_session *session) if (ret) goto end; - ret = print_metadata_escaped_field(session, "trace_name", session->name); + ret = print_metadata_escaped_field(session, "trace_name", session->priv->name); if (ret) goto end; ret = print_metadata_escaped_field(session, "trace_creation_datetime", - session->creation_time); + session->priv->creation_time); if (ret) goto end; @@ -4030,18 +4024,19 @@ int _lttng_session_metadata_statedump(struct lttng_session *session) goto end; skip_session: - list_for_each_entry(chan, &session->chan, list) { - ret = _lttng_channel_metadata_statedump(session, chan); + list_for_each_entry(chan_priv, &session->priv->chan, node) { + ret = _lttng_channel_metadata_statedump(session, chan_priv->pub); if (ret) goto end; } - list_for_each_entry(event, &session->events, list) { - ret = _lttng_event_metadata_statedump(session, event->chan, event); + 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); if (ret) goto end; } - session->metadata_dumped = 1; + session->priv->metadata_dumped = 1; end: lttng_metadata_end(session); return ret; @@ -4235,7 +4230,6 @@ static void lttng_exit_cpu_hotplug(void) } #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */ - static int __init lttng_events_init(void) { int ret; @@ -4258,16 +4252,26 @@ static int __init lttng_events_init(void) ret = lttng_tracepoint_init(); if (ret) goto error_tp; - event_cache = KMEM_CACHE(lttng_event, 0); - if (!event_cache) { + event_recorder_cache = KMEM_CACHE(lttng_kernel_event_recorder, 0); + if (!event_recorder_cache) { ret = -ENOMEM; - goto error_kmem_event; + goto error_kmem_event_recorder; } - event_notifier_cache = KMEM_CACHE(lttng_event_notifier, 0); + event_recorder_private_cache = KMEM_CACHE(lttng_kernel_event_recorder_private, 0); + if (!event_recorder_private_cache) { + ret = -ENOMEM; + goto error_kmem_event_recorder_private; + } + event_notifier_cache = KMEM_CACHE(lttng_kernel_event_notifier, 0); if (!event_notifier_cache) { ret = -ENOMEM; goto error_kmem_event_notifier; } + event_notifier_private_cache = KMEM_CACHE(lttng_kernel_event_notifier_private, 0); + if (!event_notifier_private_cache) { + ret = -ENOMEM; + goto error_kmem_event_notifier_private; + } ret = lttng_abi_init(); if (ret) goto error_abi; @@ -4293,6 +4297,9 @@ static int __init lttng_events_init(void) #else ""); #endif +#ifdef CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM + printk(KERN_NOTICE "LTTng: Experimental bitwise enum enabled.\n"); +#endif /* CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM */ return 0; error_hotplug: @@ -4300,10 +4307,14 @@ error_hotplug: error_logger: lttng_abi_exit(); error_abi: + kmem_cache_destroy(event_notifier_private_cache); +error_kmem_event_notifier_private: kmem_cache_destroy(event_notifier_cache); error_kmem_event_notifier: - kmem_cache_destroy(event_cache); -error_kmem_event: + kmem_cache_destroy(event_recorder_private_cache); +error_kmem_event_recorder_private: + kmem_cache_destroy(event_recorder_cache); +error_kmem_event_recorder: lttng_tracepoint_exit(); error_tp: lttng_context_exit(); @@ -4330,15 +4341,17 @@ module_init(lttng_events_init); static void __exit lttng_events_exit(void) { - struct lttng_session *session, *tmpsession; + struct lttng_kernel_session_private *session_priv, *tmpsession_priv; lttng_exit_cpu_hotplug(); lttng_logger_exit(); lttng_abi_exit(); - list_for_each_entry_safe(session, tmpsession, &sessions, list) - lttng_session_destroy(session); - kmem_cache_destroy(event_cache); + list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, list) + lttng_session_destroy(session_priv->pub); + kmem_cache_destroy(event_recorder_cache); + kmem_cache_destroy(event_recorder_private_cache); kmem_cache_destroy(event_notifier_cache); + kmem_cache_destroy(event_notifier_private_cache); lttng_tracepoint_exit(); lttng_context_exit(); printk(KERN_NOTICE "LTTng: Unloaded modules v%s.%s.%s%s (%s)%s%s\n",