[v3,bpf-next,3/4] tracing/probe: Sync perf_event.h to tools
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Message ID 20190816223149.5714-4-dxu@dxuuu.xyz
State Changes Requested
Delegated to: BPF Maintainers
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Series
  • tracing/probe: Add PERF_EVENT_IOC_QUERY_PROBE
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Commit Message

Daniel Xu Aug. 16, 2019, 10:31 p.m. UTC
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
---
 tools/include/uapi/linux/perf_event.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

Patch
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diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 7198ddd0c6b1..8783d29a807a 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -447,6 +447,28 @@  struct perf_event_query_bpf {
 	__u32	ids[0];
 };
 
+/*
+ * Structure used by below PERF_EVENT_IOC_QUERY_PROBE command
+ * to query information about the probe attached to the perf
+ * event. Currently only supports [uk]probes.
+ */
+struct perf_event_query_probe {
+	/*
+	 * Size of structure for forward/backward compatibility
+	 */
+	__u64	size;
+	/*
+	 * Set by the kernel to indicate number of times this probe
+	 * was temporarily disabled
+	 */
+	__u64	nmissed;
+	/*
+	 * Set by the kernel to indicate number of times this probe
+	 * was hit
+	 */
+	__u64	nhit;
+};
+
 /*
  * Ioctls that can be done on a perf event fd:
  */
@@ -462,6 +484,7 @@  struct perf_event_query_bpf {
 #define PERF_EVENT_IOC_PAUSE_OUTPUT		_IOW('$', 9, __u32)
 #define PERF_EVENT_IOC_QUERY_BPF		_IOWR('$', 10, struct perf_event_query_bpf *)
 #define PERF_EVENT_IOC_MODIFY_ATTRIBUTES	_IOW('$', 11, struct perf_event_attr *)
+#define PERF_EVENT_IOC_QUERY_PROBE		_IOR('$', 12, struct perf_event_query_probe *)
 
 enum perf_event_ioc_flags {
 	PERF_IOC_FLAG_GROUP		= 1U << 0,