Merge tag 'trace-v5.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull more tracing updates from Steven Rostedt:

 - Rename the staging files to give them some meaning. Just
   stage1,stag2,etc, does not show what they are for

 - Check for NULL from allocation in bootconfig

 - Hold event mutex for dyn_event call in user events

 - Mark user events to broken (to work on the API)

 - Remove eBPF updates from user events

 - Remove user events from uapi header to keep it from being installed.

 - Move ftrace_graph_is_dead() into inline as it is called from hot
   paths and also convert it into a static branch.

* tag 'trace-v5.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Move user_events.h temporarily out of include/uapi
  ftrace: Make ftrace_graph_is_dead() a static branch
  tracing: Set user_events to BROKEN
  tracing/user_events: Remove eBPF interfaces
  tracing/user_events: Hold event_mutex during dyn_event_add
  proc: bootconfig: Add null pointer check
  tracing: Rename the staging files for trace_events

11 files changed, 29 insertions, 68 deletions

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index ed8cf433a46a..4816b7e11047 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -9,6 +9,7 @@
 
 #include <linux/trace_recursion.h>
 #include <linux/trace_clock.h>
+#include <linux/jump_label.h>
 #include <linux/kallsyms.h>
 #include <linux/linkage.h>
 #include <linux/bitops.h>
@@ -1018,7 +1019,20 @@ unsigned long ftrace_graph_ret_addr(struct task_struct *task, int *idx,
 extern int register_ftrace_graph(struct fgraph_ops *ops);
 extern void unregister_ftrace_graph(struct fgraph_ops *ops);
 
-extern bool ftrace_graph_is_dead(void);
+/**
+ * ftrace_graph_is_dead - returns true if ftrace_graph_stop() was called
+ *
+ * ftrace_graph_stop() is called when a severe error is detected in
+ * the function graph tracing. This function is called by the critical
+ * paths of function graph to keep those paths from doing any more harm.
+ */
+DECLARE_STATIC_KEY_FALSE(kill_ftrace_graph);
+
+static inline bool ftrace_graph_is_dead(void)
+{
+	return static_branch_unlikely(&kill_ftrace_graph);
+}
+
 extern void ftrace_graph_stop(void);
 
 /* The current handlers in use */
diff --git a/include/linux/user_events.h b/include/linux/user_events.h
index e570840571e1..736e05603463 100644
--- a/include/linux/user_events.h
+++ b/include/linux/user_events.h
@@ -32,9 +32,6 @@
 /* Create dynamic location entry within a 32-bit value */
 #define DYN_LOC(offset, size) ((size) << 16 | (offset))
 
-/* Use raw iterator for attached BPF program(s), no affect on ftrace/perf */
-#define FLAG_BPF_ITER (1 << 0)
-
 /*
  * Describes an event registration and stores the results of the registration.
  * This structure is passed to the DIAG_IOCSREG ioctl, callers at a minimum
@@ -63,54 +60,4 @@ struct user_reg {
 /* Requests to delete a user_event */
 #define DIAG_IOCSDEL _IOW(DIAG_IOC_MAGIC, 1, char*)
 
-/* Data type that was passed to the BPF program */
-enum {
-	/* Data resides in kernel space */
-	USER_BPF_DATA_KERNEL,
-
-	/* Data resides in user space */
-	USER_BPF_DATA_USER,
-
-	/* Data is a pointer to a user_bpf_iter structure */
-	USER_BPF_DATA_ITER,
-};
-
-/*
- * Describes an iovec iterator that BPF programs can use to access data for
- * a given user_event write() / writev() call.
- */
-struct user_bpf_iter {
-
-	/* Offset of the data within the first iovec */
-	__u32 iov_offset;
-
-	/* Number of iovec structures */
-	__u32 nr_segs;
-
-	/* Pointer to iovec structures */
-	const struct iovec *iov;
-};
-
-/* Context that BPF programs receive when attached to a user_event */
-struct user_bpf_context {
-
-	/* Data type being passed (see union below) */
-	__u32 data_type;
-
-	/* Length of the data */
-	__u32 data_len;
-
-	/* Pointer to data, varies by data type */
-	union {
-		/* Kernel data (data_type == USER_BPF_DATA_KERNEL) */
-		void *kdata;
-
-		/* User data (data_type == USER_BPF_DATA_USER) */
-		void *udata;
-
-		/* Direct iovec (data_type == USER_BPF_DATA_ITER) */
-		struct user_bpf_iter *iter;
-	};
-};
-
 #endif /* _UAPI_LINUX_USER_EVENTS_H */
diff --git a/include/trace/stages/stage1_defines.h b/include/trace/stages/stage1_struct_define.h
index a16783419687..a16783419687 100644
--- a/include/trace/stages/stage1_defines.h
+++ b/include/trace/stages/stage1_struct_define.h
diff --git a/include/trace/stages/stage2_defines.h b/include/trace/stages/stage2_data_offsets.h
index 42fd1e8813ec..42fd1e8813ec 100644
--- a/include/trace/stages/stage2_defines.h
+++ b/include/trace/stages/stage2_data_offsets.h
diff --git a/include/trace/stages/stage3_defines.h b/include/trace/stages/stage3_trace_output.h
index e3b183e9d18e..e3b183e9d18e 100644
--- a/include/trace/stages/stage3_defines.h
+++ b/include/trace/stages/stage3_trace_output.h
diff --git a/include/trace/stages/stage4_defines.h b/include/trace/stages/stage4_event_fields.h
index e80cdc397a43..e80cdc397a43 100644
--- a/include/trace/stages/stage4_defines.h
+++ b/include/trace/stages/stage4_event_fields.h
diff --git a/include/trace/stages/stage5_defines.h b/include/trace/stages/stage5_get_offsets.h
index 7ee5931300e6..7ee5931300e6 100644
--- a/include/trace/stages/stage5_defines.h
+++ b/include/trace/stages/stage5_get_offsets.h
diff --git a/include/trace/stages/stage6_defines.h b/include/trace/stages/stage6_event_callback.h
index e1724f73594b..e1724f73594b 100644
--- a/include/trace/stages/stage6_defines.h
+++ b/include/trace/stages/stage6_event_callback.h
diff --git a/include/trace/stages/stage7_defines.h b/include/trace/stages/stage7_class_define.h
index 8a7ec24c246d..8a7ec24c246d 100644
--- a/include/trace/stages/stage7_defines.h
+++ b/include/trace/stages/stage7_class_define.h
diff --git a/include/trace/trace_custom_events.h b/include/trace/trace_custom_events.h
index b567c7202339..6e492dba96bf 100644
--- a/include/trace/trace_custom_events.h
+++ b/include/trace/trace_custom_events.h
@@ -35,7 +35,7 @@
 
 /* Stage 1 creates the structure of the recorded event layout */
 
-#include "stages/stage1_defines.h"
+#include "stages/stage1_struct_define.h"
 
 #undef DECLARE_CUSTOM_EVENT_CLASS
 #define DECLARE_CUSTOM_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
@@ -56,7 +56,7 @@
 
 /* Stage 2 creates the custom class */
 
-#include "stages/stage2_defines.h"
+#include "stages/stage2_data_offsets.h"
 
 #undef DECLARE_CUSTOM_EVENT_CLASS
 #define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
@@ -71,7 +71,7 @@
 
 /* Stage 3 create the way to print the custom event */
 
-#include "stages/stage3_defines.h"
+#include "stages/stage3_trace_output.h"
 
 #undef DECLARE_CUSTOM_EVENT_CLASS
 #define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
@@ -102,7 +102,7 @@ static struct trace_event_functions trace_custom_event_type_funcs_##call = { \
 
 /* Stage 4 creates the offset layout for the fields */
 
-#include "stages/stage4_defines.h"
+#include "stages/stage4_event_fields.h"
 
 #undef DECLARE_CUSTOM_EVENT_CLASS
 #define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, func, print)	\
@@ -114,7 +114,7 @@ static struct trace_event_fields trace_custom_event_fields_##call[] = {	\
 
 /* Stage 5 creates the helper function for dynamic fields */
 
-#include "stages/stage5_defines.h"
+#include "stages/stage5_get_offsets.h"
 
 #undef DECLARE_CUSTOM_EVENT_CLASS
 #define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
@@ -134,7 +134,7 @@ static inline notrace int trace_custom_event_get_offsets_##call(	\
 
 /* Stage 6 creates the probe function that records the event */
 
-#include "stages/stage6_defines.h"
+#include "stages/stage6_event_callback.h"
 
 #undef DECLARE_CUSTOM_EVENT_CLASS
 #define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
@@ -182,7 +182,7 @@ static inline void ftrace_test_custom_probe_##call(void)		\
 
 /* Stage 7 creates the actual class and event structure for the custom event */
 
-#include "stages/stage7_defines.h"
+#include "stages/stage7_class_define.h"
 
 #undef DECLARE_CUSTOM_EVENT_CLASS
 #define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
diff --git a/include/trace/trace_events.h b/include/trace/trace_events.h
index 8a8cd66cc6d5..c2f9cabf154d 100644
--- a/include/trace/trace_events.h
+++ b/include/trace/trace_events.h
@@ -45,7 +45,7 @@
 			     PARAMS(print));		       \
 	DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
 
-#include "stages/stage1_defines.h"
+#include "stages/stage1_struct_define.h"
 
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)	\
@@ -109,7 +109,7 @@
  * The size of an array is also encoded, in the higher 16 bits of <item>.
  */
 
-#include "stages/stage2_defines.h"
+#include "stages/stage2_data_offsets.h"
 
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
@@ -181,7 +181,7 @@
  * in binary.
  */
 
-#include "stages/stage3_defines.h"
+#include "stages/stage3_trace_output.h"
 
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
@@ -236,7 +236,7 @@ static struct trace_event_functions trace_event_type_funcs_##call = {	\
 
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
-#include "stages/stage4_defines.h"
+#include "stages/stage4_event_fields.h"
 
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)	\
@@ -249,7 +249,7 @@ static struct trace_event_fields trace_event_fields_##call[] = {	\
 
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
-#include "stages/stage5_defines.h"
+#include "stages/stage5_get_offsets.h"
 
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
@@ -372,7 +372,7 @@ static inline notrace int trace_event_get_offsets_##call(		\
 #define _TRACE_PERF_INIT(call)
 #endif /* CONFIG_PERF_EVENTS */
 
-#include "stages/stage6_defines.h"
+#include "stages/stage6_event_callback.h"
 
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
@@ -418,7 +418,7 @@ static inline void ftrace_test_probe_##call(void)			\
 
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
-#include "stages/stage7_defines.h"
+#include "stages/stage7_class_define.h"
 
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\