TRACE_EVENT_FL_NO_SET_FILTER_BIT,
TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
TRACE_EVENT_FL_TRACEPOINT_BIT,
+ TRACE_EVENT_FL_DYNAMIC_BIT,
TRACE_EVENT_FL_KPROBE_BIT,
TRACE_EVENT_FL_UPROBE_BIT,
+ TRACE_EVENT_FL_EPROBE_BIT,
};
/*
* NO_SET_FILTER - Set when filter has error and is to be ignored
* IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
* TRACEPOINT - Event is a tracepoint
+ * DYNAMIC - Event is a dynamic event (created at run time)
* KPROBE - Event is a kprobe
* UPROBE - Event is a uprobe
+ * EPROBE - Event is an event probe
*/
enum {
TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
+ TRACE_EVENT_FL_DYNAMIC = (1 << TRACE_EVENT_FL_DYNAMIC_BIT),
TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT),
TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT),
+ TRACE_EVENT_FL_EPROBE = (1 << TRACE_EVENT_FL_EPROBE_BIT),
};
#define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
struct trace_event event;
char *print_fmt;
struct event_filter *filter;
- void *mod;
+ /*
+ * Static events can disappear with modules,
+ * where as dynamic ones need their own ref count.
+ */
+ union {
+ void *module;
+ atomic_t refcnt;
+ };
void *data;
/* See the TRACE_EVENT_FL_* flags above */
#endif
};
+#ifdef CONFIG_DYNAMIC_EVENTS
+bool trace_event_dyn_try_get_ref(struct trace_event_call *call);
+void trace_event_dyn_put_ref(struct trace_event_call *call);
+bool trace_event_dyn_busy(struct trace_event_call *call);
+#else
+static inline bool trace_event_dyn_try_get_ref(struct trace_event_call *call)
+{
+ /* Without DYNAMIC_EVENTS configured, nothing should be calling this */
+ return false;
+}
+static inline void trace_event_dyn_put_ref(struct trace_event_call *call)
+{
+}
+static inline bool trace_event_dyn_busy(struct trace_event_call *call)
+{
+ /* Nothing should call this without DYNAIMIC_EVENTS configured. */
+ return true;
+}
+#endif
+
+static inline bool trace_event_try_get_ref(struct trace_event_call *call)
+{
+ if (call->flags & TRACE_EVENT_FL_DYNAMIC)
+ return trace_event_dyn_try_get_ref(call);
+ else
+ return try_module_get(call->module);
+}
+
+static inline void trace_event_put_ref(struct trace_event_call *call)
+{
+ if (call->flags & TRACE_EVENT_FL_DYNAMIC)
+ trace_event_dyn_put_ref(call);
+ else
+ module_put(call->module);
+}
+
#ifdef CONFIG_PERF_EVENTS
static inline bool bpf_prog_array_valid(struct trace_event_call *call)
{
ETT_EVENT_ENABLE = (1 << 3),
ETT_EVENT_HIST = (1 << 4),
ETT_HIST_ENABLE = (1 << 5),
+ ETT_EVENT_EPROBE = (1 << 6),
};
extern int filter_match_preds(struct event_filter *filter, void *rec);