X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=src%2Flttng-events.c;h=bed65028a912fff796d2cf5a00c411780b926ecc;hb=6b757027d2404725d3ae002ae682f4db878adfbb;hp=1d3cb28ebeeb1fdaf2590f042ee408fe0f407b2c;hpb=5b9817aed64e239c4a2e2a1564869402074b080d;p=lttng-modules.git diff --git a/src/lttng-events.c b/src/lttng-events.c index 1d3cb28e..bed65028 100644 --- a/src/lttng-events.c +++ b/src/lttng-events.c @@ -66,12 +66,12 @@ static struct kmem_cache *event_notifier_private_cache; 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_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler); 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_kernel_event_common *event); static void _lttng_channel_destroy(struct lttng_kernel_channel_buffer *chan); -static int _lttng_event_unregister(struct lttng_kernel_event_recorder *event); +static int _lttng_event_recorder_unregister(struct lttng_kernel_event_recorder *event); static int _lttng_event_notifier_unregister(struct lttng_kernel_event_notifier *event_notifier); static int _lttng_event_metadata_statedump(struct lttng_kernel_session *session, @@ -354,7 +354,7 @@ void lttng_session_destroy(struct lttng_kernel_session *session) 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_recorder_enabler *event_recorder_enabler, *tmp_event_recorder_enabler; int ret; mutex_lock(&sessions_mutex); @@ -364,17 +364,17 @@ void lttng_session_destroy(struct lttng_kernel_session *session) WARN_ON(ret); } list_for_each_entry(event_recorder_priv, &session->priv->events, node) { - ret = _lttng_event_unregister(event_recorder_priv->pub); + ret = _lttng_event_recorder_unregister(event_recorder_priv->pub); WARN_ON(ret); } synchronize_trace(); /* Wait for in-flight events to complete */ list_for_each_entry(chan_priv, &session->priv->chan, node) { - ret = lttng_syscalls_destroy_event(chan_priv->pub); + ret = lttng_syscalls_destroy_channel(chan_priv->pub); WARN_ON(ret); } - list_for_each_entry_safe(event_enabler, tmp_event_enabler, + list_for_each_entry_safe(event_recorder_enabler, tmp_event_recorder_enabler, &session->priv->enablers_head, node) - lttng_event_enabler_destroy(event_enabler); + lttng_event_enabler_destroy(&event_recorder_enabler->parent); list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, &session->priv->events, node) _lttng_event_destroy(&event_recorder_priv->pub->parent); list_for_each_entry_safe(chan_priv, tmpchan_priv, &session->priv->chan, node) { @@ -424,11 +424,11 @@ void lttng_event_notifier_group_destroy( irq_work_sync(&event_notifier_group->wakeup_pending); - kfree(event_notifier_group->sc_filter); + kfree(event_notifier_group->syscall_table.sc_filter); list_for_each_entry_safe(event_notifier_enabler, tmp_event_notifier_enabler, &event_notifier_group->enablers_head, node) - lttng_event_notifier_enabler_destroy(event_notifier_enabler); + lttng_event_enabler_destroy(&event_notifier_enabler->parent); list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, &event_notifier_group->event_notifiers_head, node) @@ -578,47 +578,60 @@ end: return ret; } -int lttng_channel_enable(struct lttng_kernel_channel_buffer *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->priv->channel_type == METADATA_CHANNEL) { + if (is_channel_buffer_metadata(channel)) { ret = -EPERM; goto end; } - if (channel->parent.enabled) { + if (channel->enabled) { ret = -EEXIST; goto end; } /* Set transient enabler state to "enabled" */ - channel->priv->parent.tstate = 1; - lttng_session_sync_event_enablers(channel->parent.session); + channel->priv->tstate = 1; + lttng_session_sync_event_enablers(channel->session); /* Set atomically the state to "enabled" */ - WRITE_ONCE(channel->parent.enabled, 1); + WRITE_ONCE(channel->enabled, 1); end: mutex_unlock(&sessions_mutex); return ret; } -int lttng_channel_disable(struct lttng_kernel_channel_buffer *channel) +int lttng_channel_disable(struct lttng_kernel_channel_common *channel) { int ret = 0; mutex_lock(&sessions_mutex); - if (channel->priv->channel_type == METADATA_CHANNEL) { + if (is_channel_buffer_metadata(channel)) { ret = -EPERM; goto end; } - if (!channel->parent.enabled) { + if (!channel->enabled) { ret = -EEXIST; goto end; } /* Set atomically the state to "disabled" */ - WRITE_ONCE(channel->parent.enabled, 0); + WRITE_ONCE(channel->enabled, 0); /* Set transient enabler state to "enabled" */ - channel->priv->parent.tstate = 0; - lttng_session_sync_event_enablers(channel->parent.session); + channel->priv->tstate = 0; + lttng_session_sync_event_enablers(channel->session); end: mutex_unlock(&sessions_mutex); return ret; @@ -859,7 +872,7 @@ 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_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_event_enabler *event_enabler, +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_kernel_channel_buffer *chan = event_enabler->chan; @@ -1395,7 +1408,7 @@ int lttng_kernel_counter_clear(struct lttng_counter *counter, return counter->ops->counter_clear(counter->counter, dim_indexes); } -struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_event_enabler *event_enabler, +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_kernel_event_recorder *event; @@ -1425,7 +1438,7 @@ struct lttng_kernel_event_notifier *lttng_event_notifier_create( /* Only used for tracepoints for now. */ static -void register_event(struct lttng_kernel_event_recorder *event_recorder) +void register_event_recorder(struct lttng_kernel_event_recorder *event_recorder) { const struct lttng_kernel_event_desc *desc; int ret = -EINVAL; @@ -1442,7 +1455,7 @@ void register_event(struct lttng_kernel_event_recorder *event_recorder) break; case LTTNG_KERNEL_ABI_SYSCALL: - ret = lttng_syscall_filter_enable_event(event_recorder->chan, event_recorder); + ret = lttng_syscall_filter_enable_event_recorder(event_recorder); break; case LTTNG_KERNEL_ABI_KPROBE: @@ -1467,7 +1480,7 @@ void register_event(struct lttng_kernel_event_recorder *event_recorder) /* * Only used internally at session destruction. */ -int _lttng_event_unregister(struct lttng_kernel_event_recorder *event_recorder) +int _lttng_event_recorder_unregister(struct lttng_kernel_event_recorder *event_recorder) { struct lttng_kernel_event_common_private *event_priv = &event_recorder->priv->parent; const struct lttng_kernel_event_desc *desc; @@ -1495,7 +1508,7 @@ int _lttng_event_unregister(struct lttng_kernel_event_recorder *event_recorder) break; case LTTNG_KERNEL_ABI_SYSCALL: - ret = lttng_syscall_filter_disable_event(event_recorder->chan, event_recorder); + ret = lttng_syscall_filter_disable_event_recorder(event_recorder); break; case LTTNG_KERNEL_ABI_NOOP: @@ -2067,10 +2080,10 @@ int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, } static -int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, +int lttng_event_enabler_match_event(struct lttng_event_recorder_enabler *event_enabler, struct lttng_kernel_event_recorder *event_recorder) { - struct lttng_event_enabler_common *base_enabler = lttng_event_enabler_as_enabler( + struct lttng_event_enabler_common *base_enabler = lttng_event_recorder_enabler_as_enabler( event_enabler); if (base_enabler->event_param.instrumentation != event_recorder->priv->parent.instrumentation) @@ -2114,7 +2127,7 @@ 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_recorder_enabler *event_enabler) { struct lttng_kernel_session *session = event_enabler->chan->parent.session; struct lttng_kernel_probe_desc *probe_desc; @@ -2137,7 +2150,7 @@ void lttng_create_tracepoint_event_if_missing(struct lttng_event_enabler *event_ desc = probe_desc->event_desc[i]; if (!lttng_desc_match_enabler(desc, - lttng_event_enabler_as_enabler(event_enabler))) + lttng_event_recorder_enabler_as_enabler(event_enabler))) continue; /* @@ -2225,7 +2238,7 @@ void lttng_create_tracepoint_event_notifier_if_missing(struct lttng_event_notifi } static -void lttng_create_syscall_event_if_missing(struct lttng_event_enabler *event_enabler) +void lttng_create_syscall_event_if_missing(struct lttng_event_recorder_enabler *event_enabler) { int ret; @@ -2250,7 +2263,7 @@ void lttng_create_syscall_event_notifier_if_missing(struct lttng_event_notifier_ * 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_recorder_enabler *event_enabler) { switch (event_enabler->parent.event_param.instrumentation) { case LTTNG_KERNEL_ABI_TRACEPOINT: @@ -2273,11 +2286,11 @@ void lttng_create_event_if_missing(struct lttng_event_enabler *event_enabler) * Should be called with sessions mutex held. */ static -int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler) +int lttng_event_enabler_ref_events(struct lttng_event_recorder_enabler *event_enabler) { struct lttng_kernel_channel_buffer *chan = event_enabler->chan; struct lttng_kernel_session *session = event_enabler->chan->parent.session; - struct lttng_event_enabler_common *base_enabler = lttng_event_enabler_as_enabler(event_enabler); + struct lttng_event_enabler_common *base_enabler = lttng_event_recorder_enabler_as_enabler(event_enabler); struct lttng_kernel_event_recorder_private *event_recorder_priv; if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_ABI_SYSCALL && @@ -2288,10 +2301,10 @@ int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler) 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->priv->parent.syscall_all_entry, enabled); + WRITE_ONCE(chan->priv->parent.syscall_table.syscall_all_entry, enabled); if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) - WRITE_ONCE(chan->priv->parent.syscall_all_exit, enabled); + WRITE_ONCE(chan->priv->parent.syscall_table.syscall_all_exit, enabled); } /* First ensure that probe events are created for this enabler. */ @@ -2305,7 +2318,7 @@ int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler) if (!lttng_event_enabler_match_event(event_enabler, event_recorder)) continue; enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, - lttng_event_enabler_as_enabler(event_enabler)); + lttng_event_recorder_enabler_as_enabler(event_enabler)); if (!enabler_ref) { /* * If no backward ref, create it. @@ -2314,7 +2327,7 @@ int lttng_event_enabler_ref_events(struct lttng_event_enabler *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); + enabler_ref->ref = lttng_event_recorder_enabler_as_enabler(event_enabler); list_add(&enabler_ref->node, &event_recorder_priv->parent.enablers_ref_head); } @@ -2325,7 +2338,7 @@ int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler) lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, lttng_static_ctx, &event_recorder_priv->parent.filter_bytecode_runtime_head, - <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); + <tng_event_recorder_enabler_as_enabler(event_enabler)->filter_bytecode_head); } return 0; } @@ -2373,10 +2386,10 @@ int lttng_event_notifier_enabler_ref_event_notifiers( 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); + WRITE_ONCE(event_notifier_group->syscall_table.syscall_all_entry, enabled); if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) - WRITE_ONCE(event_notifier_group->syscall_all_exit, enabled); + WRITE_ONCE(event_notifier_group->syscall_table.syscall_all_exit, enabled); } @@ -2472,16 +2485,17 @@ 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_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->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, @@ -2493,7 +2507,7 @@ struct lttng_event_enabler *lttng_event_enabler_create( } void lttng_event_enabler_session_add(struct lttng_kernel_session *session, - struct lttng_event_enabler *event_enabler) + struct lttng_event_recorder_enabler *event_enabler) { mutex_lock(&sessions_mutex); list_add(&event_enabler->node, &session->priv->enablers_head); @@ -2502,20 +2516,20 @@ void lttng_event_enabler_session_add(struct lttng_kernel_session *session, mutex_unlock(&sessions_mutex); } -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->parent.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->parent.session); + event_enabler->enabled = 0; + lttng_event_enabler_sync(event_enabler); mutex_unlock(&sessions_mutex); return 0; } @@ -2553,16 +2567,14 @@ 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->parent.session); + lttng_event_enabler_sync(event_enabler); return 0; error: @@ -2593,13 +2605,33 @@ void lttng_enabler_destroy(struct lttng_event_enabler_common *enabler) } } -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)); + 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); - if (event_enabler->published) - list_del(&event_enabler->node); - kfree(event_enabler); + lttng_enabler_destroy(event_enabler); + if (event_recorder_enabler->published) + list_del(&event_recorder_enabler->node); + 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_notifier_enabler->node); + lttng_enabler_destroy(event_enabler); + kfree(event_notifier_enabler); + break; + } + default: + WARN_ON_ONCE(1); + } } struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( @@ -2613,6 +2645,7 @@ struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( if (!event_notifier_enabler) return NULL; + 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); @@ -2656,25 +2689,6 @@ 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) @@ -2717,20 +2731,6 @@ end: return ret; } -static -void lttng_event_notifier_enabler_destroy( - struct lttng_event_notifier_enabler *event_notifier_enabler) -{ - if (!event_notifier_enabler) { - return; - } - - list_del(&event_notifier_enabler->node); - - lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); - kfree(event_notifier_enabler); -} - /* * lttng_session_sync_event_enablers should be called just before starting a * session. @@ -2739,7 +2739,7 @@ void lttng_event_notifier_enabler_destroy( static void lttng_session_sync_event_enablers(struct lttng_kernel_session *session) { - struct lttng_event_enabler *event_enabler; + struct lttng_event_recorder_enabler *event_enabler; struct lttng_kernel_event_recorder_private *event_recorder_priv; list_for_each_entry(event_enabler, &session->priv->enablers_head, node) @@ -2787,9 +2787,9 @@ void lttng_session_sync_event_enablers(struct lttng_kernel_session *session) * state. */ if (enabled) { - register_event(event_recorder); + register_event_recorder(event_recorder); } else { - _lttng_event_unregister(event_recorder); + _lttng_event_recorder_unregister(event_recorder); } /* Check if has enablers without bytecode enabled */ @@ -2914,6 +2914,29 @@ void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group } } +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); + } +} + /* * Serialize at most one packet worth of metadata into a metadata * channel.