union {
struct {
const char **model_emf_uri;
+ void (*event_notifier_callback)(void);
} ext;
char padding[LTTNG_UST_EVENT_DESC_PADDING];
} u;
/* Data structures used by the tracer. */
-enum lttng_enabler_type {
- LTTNG_ENABLER_STAR_GLOB,
- LTTNG_ENABLER_EVENT,
+enum lttng_enabler_format_type {
+ LTTNG_ENABLER_FORMAT_STAR_GLOB,
+ LTTNG_ENABLER_FORMAT_EVENT,
};
/*
* backward reference.
*/
struct lttng_enabler {
- enum lttng_enabler_type type;
+ enum lttng_enabler_format_type format_type;
/* head list of struct lttng_ust_filter_bytecode_node */
struct cds_list_head filter_bytecode_head;
/* head list of struct lttng_ust_excluder_node */
struct cds_list_head excluder_head;
- struct cds_list_head node; /* per-session list of enablers */
struct lttng_ust_event event_param;
- struct lttng_channel *chan;
- /*
- * Unused, but kept around to make it explicit that the tracer can do
- * it.
- */
- struct lttng_ctx *ctx;
unsigned int enabled:1;
};
struct ust_pending_probe;
struct lttng_event;
-struct lttng_ust_filter_bytecode_node {
- struct cds_list_head node;
- struct lttng_enabler *enabler;
- /*
- * struct lttng_ust_filter_bytecode has var. sized array, must
- * be last field.
- */
- struct lttng_ust_filter_bytecode bc;
-};
-
-struct lttng_ust_excluder_node {
- struct cds_list_head node;
- struct lttng_enabler *enabler;
- /*
- * struct lttng_ust_event_exclusion had variable sized array,
- * must be last field.
- */
- struct lttng_ust_event_exclusion excluder;
-};
/*
* Filter return value masks.
*/
uint64_t (*filter)(void *filter_data, const char *filter_stack_data);
int link_failed;
struct cds_list_head node; /* list of bytecode runtime in event */
- struct lttng_session *session;
+ /*
+ * Pointer to a URCU-protected pointer owned by an `struct
+ * lttng_session`or `struct lttng_event_notifier_group`.
+ */
+ struct lttng_ctx **pctx;
};
/*
- * Objects in a linked-list of enablers, owned by an event.
+ * Objects in a linked-list of enablers, owned by an event or event_notifier.
+ * This is used because an event (or a event_notifier) can be enabled by more
+ * than one enabler and we want a quick way to iterate over all enablers of an
+ * object.
+ *
+ * For example, event rules "my_app:a*" and "my_app:ab*" will both match the
+ * event with the name "my_app:abc".
*/
struct lttng_enabler_ref {
struct cds_list_head node; /* enabler ref list */
int registered; /* has reg'd tracepoint probe */
};
+struct lttng_event_notifier {
+ uint64_t user_token;
+ int enabled;
+ int registered; /* has reg'd tracepoint probe */
+ struct cds_list_head filter_bytecode_runtime_head;
+ int has_enablers_without_bytecode;
+ struct cds_list_head enablers_ref_head;
+ const struct lttng_event_desc *desc;
+ struct cds_hlist_node hlist; /* hashtable of event_notifiers */
+ struct cds_list_head node; /* event_notifier list in session */
+ struct lttng_event_notifier_group *group; /* weak ref */
+};
+
struct lttng_enum {
const struct lttng_enum_desc *desc;
struct lttng_session *session;
struct cds_hlist_head table[LTTNG_UST_EVENT_HT_SIZE];
};
+#define LTTNG_UST_EVENT_NOTIFIER_HT_BITS 12
+#define LTTNG_UST_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_UST_EVENT_NOTIFIER_HT_BITS)
+struct lttng_ust_event_notifier_ht {
+ struct cds_hlist_head table[LTTNG_UST_EVENT_NOTIFIER_HT_SIZE];
+};
+
#define LTTNG_UST_ENUM_HT_BITS 12
#define LTTNG_UST_ENUM_HT_SIZE (1U << LTTNG_UST_ENUM_HT_BITS)
struct lttng_ctx *ctx; /* contexts for filters. */
};
+struct lttng_event_notifier_group {
+ int objd;
+ void *owner;
+ int notification_fd;
+ struct cds_list_head node; /* Event notifier group handle list */
+ struct cds_list_head enablers_head;
+ struct cds_list_head event_notifiers_head; /* list of event_notifiers */
+ struct lttng_ust_event_notifier_ht event_notifiers_ht; /* hashtable of event_notifiers */
+ struct lttng_ctx *ctx; /* contexts for filters. */
+};
+
struct lttng_transport {
char *name;
struct cds_list_head node;
int lttng_session_statedump(struct lttng_session *session);
void lttng_session_destroy(struct lttng_session *session);
+void lttng_event_notifier_notification_send(
+ struct lttng_event_notifier *event_notifier);
+
struct lttng_channel *lttng_channel_create(struct lttng_session *session,
const char *transport_name,
void *buf_addr,
int lttng_channel_enable(struct lttng_channel *channel);
int lttng_channel_disable(struct lttng_channel *channel);
-struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type,
- struct lttng_ust_event *event_param,
- struct lttng_channel *chan);
-int lttng_enabler_enable(struct lttng_enabler *enabler);
-int lttng_enabler_disable(struct lttng_enabler *enabler);
-int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler,
- struct lttng_ust_filter_bytecode_node *bytecode);
-int lttng_enabler_attach_context(struct lttng_enabler *enabler,
- struct lttng_ust_context *ctx);
-int lttng_enabler_attach_exclusion(struct lttng_enabler *enabler,
- struct lttng_ust_excluder_node *excluder);
-
int lttng_attach_context(struct lttng_ust_context *context_param,
union ust_args *uargs,
struct lttng_ctx **ctx, struct lttng_session *session);
int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx);
int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx);
int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx);
int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx);
int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx);
int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx);
void lttng_context_mnt_ns_reset(void);
void lttng_context_net_ns_reset(void);
void lttng_context_pid_ns_reset(void);
+void lttng_context_time_ns_reset(void);
void lttng_context_user_ns_reset(void);
void lttng_context_uts_ns_reset(void);
void lttng_context_vuid_reset(void);
struct lttng_ust_field_iter *
lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list);
-void lttng_enabler_event_link_bytecode(struct lttng_event *event,
- struct lttng_enabler *enabler);
void lttng_free_event_filter_runtime(struct lttng_event *event);
void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime);
/* For backward compatibility. Leave those exported symbols in place. */
extern struct lttng_ctx *lttng_static_ctx;
+struct lttng_ust_filter_bytecode_node;
+struct lttng_ust_excluder_node;
void lttng_context_init(void);
void lttng_context_exit(void);
void lttng_filter_event_link_bytecode(struct lttng_event *event);
+struct lttng_enabler *lttng_enabler_create(
+ enum lttng_enabler_format_type format_type,
+ struct lttng_ust_event *event_param,
+ struct lttng_channel *chan);
+int lttng_enabler_enable(struct lttng_enabler *enabler);
+int lttng_enabler_disable(struct lttng_enabler *enabler);
+int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler,
+ struct lttng_ust_filter_bytecode_node *bytecode);
+int lttng_enabler_attach_context(struct lttng_enabler *enabler,
+ struct lttng_ust_context *ctx);
+int lttng_enabler_attach_exclusion(struct lttng_enabler *enabler,
+ struct lttng_ust_excluder_node *excluder);
+void lttng_enabler_event_link_bytecode(struct lttng_event *event,
+ struct lttng_enabler *enabler);
#ifdef __cplusplus
}
projects / lttng-ust.git / blobdiff