Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (105 commits)
  ring-buffer: only enable ring_buffer_swap_cpu when needed
  ring-buffer: check for swapped buffers in start of committing
  tracing: report error in trace if we fail to swap latency buffer
  tracing: add trace_array_printk for internal tracers to use
  tracing: pass around ring buffer instead of tracer
  tracing: make tracing_reset safe for external use
  tracing: use timestamp to determine start of latency traces
  tracing: Remove mentioning of legacy latency_trace file from documentation
  tracing/filters: Defer pred allocation, fix memory leak
  tracing: remove users of tracing_reset
  tracing: disable buffers and synchronize_sched before resetting
  tracing: disable update max tracer while reading trace
  tracing: print out start and stop in latency traces
  ring-buffer: disable all cpu buffers when one finds a problem
  ring-buffer: do not count discarded events
  ring-buffer: remove ring_buffer_event_discard
  ring-buffer: fix ring_buffer_read crossing pages
  ring-buffer: remove unnecessary cpu_relax
  ring-buffer: do not swap buffers during a commit
  ring-buffer: do not reset while in a commit
  ...

6 files changed, 311 insertions, 45 deletions

diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h
index f7a7ae1..2a4b3bf 100644
--- a/include/trace/define_trace.h
+++ b/include/trace/define_trace.h
@@ -26,6 +26,11 @@
 #define TRACE_EVENT(name, proto, args, tstruct, assign, print)	\
 	DEFINE_TRACE(name)
 
+#undef TRACE_EVENT_FN
+#define TRACE_EVENT_FN(name, proto, args, tstruct,		\
+		assign, print, reg, unreg)			\
+	DEFINE_TRACE_FN(name, reg, unreg)
+
 #undef DECLARE_TRACE
 #define DECLARE_TRACE(name, proto, args)	\
 	DEFINE_TRACE(name)
@@ -56,6 +61,8 @@
 #include <trace/ftrace.h>
 #endif
 
+#undef TRACE_EVENT
+#undef TRACE_EVENT_FN
 #undef TRACE_HEADER_MULTI_READ
 
 /* Only undef what we defined in this file */
diff --git a/include/trace/events/module.h b/include/trace/events/module.h
new file mode 100644
index 0000000..84160fb
--- /dev/null
+++ b/include/trace/events/module.h
@@ -0,0 +1,126 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM module
+
+#if !defined(_TRACE_MODULE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_MODULE_H
+
+#include <linux/tracepoint.h>
+
+#ifdef CONFIG_MODULES
+
+struct module;
+
+#define show_module_flags(flags) __print_flags(flags, "",	\
+	{ (1UL << TAINT_PROPRIETARY_MODULE),	"P" },		\
+	{ (1UL << TAINT_FORCED_MODULE),		"F" },		\
+	{ (1UL << TAINT_CRAP),			"C" })
+
+TRACE_EVENT(module_load,
+
+	TP_PROTO(struct module *mod),
+
+	TP_ARGS(mod),
+
+	TP_STRUCT__entry(
+		__field(	unsigned int,	taints		)
+		__string(	name,		mod->name	)
+	),
+
+	TP_fast_assign(
+		__entry->taints = mod->taints;
+		__assign_str(name, mod->name);
+	),
+
+	TP_printk("%s %s", __get_str(name), show_module_flags(__entry->taints))
+);
+
+TRACE_EVENT(module_free,
+
+	TP_PROTO(struct module *mod),
+
+	TP_ARGS(mod),
+
+	TP_STRUCT__entry(
+		__string(	name,		mod->name	)
+	),
+
+	TP_fast_assign(
+		__assign_str(name, mod->name);
+	),
+
+	TP_printk("%s", __get_str(name))
+);
+
+TRACE_EVENT(module_get,
+
+	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
+
+	TP_ARGS(mod, ip, refcnt),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	ip		)
+		__field(	int,		refcnt		)
+		__string(	name,		mod->name	)
+	),
+
+	TP_fast_assign(
+		__entry->ip	= ip;
+		__entry->refcnt	= refcnt;
+		__assign_str(name, mod->name);
+	),
+
+	TP_printk("%s call_site=%pf refcnt=%d",
+		  __get_str(name), (void *)__entry->ip, __entry->refcnt)
+);
+
+TRACE_EVENT(module_put,
+
+	TP_PROTO(struct module *mod, unsigned long ip, int refcnt),
+
+	TP_ARGS(mod, ip, refcnt),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	ip		)
+		__field(	int,		refcnt		)
+		__string(	name,		mod->name	)
+	),
+
+	TP_fast_assign(
+		__entry->ip	= ip;
+		__entry->refcnt	= refcnt;
+		__assign_str(name, mod->name);
+	),
+
+	TP_printk("%s call_site=%pf refcnt=%d",
+		  __get_str(name), (void *)__entry->ip, __entry->refcnt)
+);
+
+TRACE_EVENT(module_request,
+
+	TP_PROTO(char *name, bool wait, unsigned long ip),
+
+	TP_ARGS(name, wait, ip),
+
+	TP_STRUCT__entry(
+		__field(	bool,		wait		)
+		__field(	unsigned long,	ip		)
+		__string(	name,		name		)
+	),
+
+	TP_fast_assign(
+		__entry->wait	= wait;
+		__entry->ip	= ip;
+		__assign_str(name, name);
+	),
+
+	TP_printk("%s wait=%d call_site=%pf",
+		  __get_str(name), (int)__entry->wait, (void *)__entry->ip)
+);
+
+#endif /* CONFIG_MODULES */
+
+#endif /* _TRACE_MODULE_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
+
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index a4c369e..b48f1ad 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -94,6 +94,7 @@ TRACE_EVENT(sched_wakeup,
 		__field(	pid_t,	pid			)
 		__field(	int,	prio			)
 		__field(	int,	success			)
+		__field(	int,	cpu			)
 	),
 
 	TP_fast_assign(
@@ -101,11 +102,12 @@ TRACE_EVENT(sched_wakeup,
 		__entry->pid		= p->pid;
 		__entry->prio		= p->prio;
 		__entry->success	= success;
+		__entry->cpu		= task_cpu(p);
 	),
 
-	TP_printk("task %s:%d [%d] success=%d",
+	TP_printk("task %s:%d [%d] success=%d [%03d]",
 		  __entry->comm, __entry->pid, __entry->prio,
-		  __entry->success)
+		  __entry->success, __entry->cpu)
 );
 
 /*
@@ -125,6 +127,7 @@ TRACE_EVENT(sched_wakeup_new,
 		__field(	pid_t,	pid			)
 		__field(	int,	prio			)
 		__field(	int,	success			)
+		__field(	int,	cpu			)
 	),
 
 	TP_fast_assign(
@@ -132,11 +135,12 @@ TRACE_EVENT(sched_wakeup_new,
 		__entry->pid		= p->pid;
 		__entry->prio		= p->prio;
 		__entry->success	= success;
+		__entry->cpu		= task_cpu(p);
 	),
 
-	TP_printk("task %s:%d [%d] success=%d",
+	TP_printk("task %s:%d [%d] success=%d [%03d]",
 		  __entry->comm, __entry->pid, __entry->prio,
-		  __entry->success)
+		  __entry->success, __entry->cpu)
 );
 
 /*
diff --git a/include/trace/events/syscalls.h b/include/trace/events/syscalls.h
new file mode 100644
index 0000000..397dff2
--- /dev/null
+++ b/include/trace/events/syscalls.h
@@ -0,0 +1,70 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM syscalls
+
+#if !defined(_TRACE_EVENTS_SYSCALLS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_EVENTS_SYSCALLS_H
+
+#include <linux/tracepoint.h>
+
+#include <asm/ptrace.h>
+#include <asm/syscall.h>
+
+
+#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+
+extern void syscall_regfunc(void);
+extern void syscall_unregfunc(void);
+
+TRACE_EVENT_FN(sys_enter,
+
+	TP_PROTO(struct pt_regs *regs, long id),
+
+	TP_ARGS(regs, id),
+
+	TP_STRUCT__entry(
+		__field(	long,		id		)
+		__array(	unsigned long,	args,	6	)
+	),
+
+	TP_fast_assign(
+		__entry->id	= id;
+		syscall_get_arguments(current, regs, 0, 6, __entry->args);
+	),
+
+	TP_printk("NR %ld (%lx, %lx, %lx, %lx, %lx, %lx)",
+		  __entry->id,
+		  __entry->args[0], __entry->args[1], __entry->args[2],
+		  __entry->args[3], __entry->args[4], __entry->args[5]),
+
+	syscall_regfunc, syscall_unregfunc
+);
+
+TRACE_EVENT_FN(sys_exit,
+
+	TP_PROTO(struct pt_regs *regs, long ret),
+
+	TP_ARGS(regs, ret),
+
+	TP_STRUCT__entry(
+		__field(	long,	id	)
+		__field(	long,	ret	)
+	),
+
+	TP_fast_assign(
+		__entry->id	= syscall_get_nr(current, regs);
+		__entry->ret	= ret;
+	),
+
+	TP_printk("NR %ld = %ld",
+		  __entry->id, __entry->ret),
+
+	syscall_regfunc, syscall_unregfunc
+);
+
+#endif /* CONFIG_HAVE_SYSCALL_TRACEPOINTS */
+
+#endif /* _TRACE_EVENTS_SYSCALLS_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
+
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index f64fbaa..308bafd 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -21,11 +21,14 @@
 #undef __field
 #define __field(type, item)		type	item;
 
+#undef __field_ext
+#define __field_ext(type, item, filter_type)	type	item;
+
 #undef __array
 #define __array(type, item, len)	type	item[len];
 
 #undef __dynamic_array
-#define __dynamic_array(type, item, len) unsigned short __data_loc_##item;
+#define __dynamic_array(type, item, len) u32 __data_loc_##item;
 
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)
@@ -42,6 +45,16 @@
 	};							\
 	static struct ftrace_event_call event_##name
 
+#undef __cpparg
+#define __cpparg(arg...) arg
+
+/* Callbacks are meaningless to ftrace. */
+#undef TRACE_EVENT_FN
+#define TRACE_EVENT_FN(name, proto, args, tstruct,			\
+		assign, print, reg, unreg)				\
+	TRACE_EVENT(name, __cpparg(proto), __cpparg(args),		\
+		__cpparg(tstruct), __cpparg(assign), __cpparg(print))	\
+
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
 
@@ -51,23 +64,27 @@
  * Include the following:
  *
  * struct ftrace_data_offsets_<call> {
- *	int				<item1>;
- *	int				<item2>;
+ *	u32				<item1>;
+ *	u32				<item2>;
  *	[...]
  * };
  *
- * The __dynamic_array() macro will create each int <item>, this is
+ * The __dynamic_array() macro will create each u32 <item>, this is
  * to keep the offset of each array from the beginning of the event.
+ * The size of an array is also encoded, in the higher 16 bits of <item>.
  */
 
 #undef __field
-#define __field(type, item);
+#define __field(type, item)
+
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
 
 #undef __array
 #define __array(type, item, len)
 
 #undef __dynamic_array
-#define __dynamic_array(type, item, len)	int item;
+#define __dynamic_array(type, item, len)	u32 item;
 
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)
@@ -109,6 +126,9 @@
 	if (!ret)							\
 		return 0;
 
+#undef __field_ext
+#define __field_ext(type, item, filter_type)	__field(type, item)
+
 #undef __array
 #define __array(type, item, len)						\
 	ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t"	\
@@ -120,7 +140,7 @@
 
 #undef __dynamic_array
 #define __dynamic_array(type, item, len)				       \
-	ret = trace_seq_printf(s, "\tfield:__data_loc " #item ";\t"	       \
+	ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\
 			       "offset:%u;\tsize:%u;\n",		       \
 			       (unsigned int)offsetof(typeof(field),	       \
 					__data_loc_##item),		       \
@@ -150,7 +170,8 @@
 #undef TRACE_EVENT
 #define TRACE_EVENT(call, proto, args, tstruct, func, print)		\
 static int								\
-ftrace_format_##call(struct trace_seq *s)				\
+ftrace_format_##call(struct ftrace_event_call *unused,			\
+		      struct trace_seq *s)				\
 {									\
 	struct ftrace_raw_##call field __attribute__((unused));		\
 	int ret = 0;							\
@@ -210,7 +231,7 @@ ftrace_format_##call(struct trace_seq *s)				\
 
 #undef __get_dynamic_array
 #define __get_dynamic_array(field)	\
-		((void *)__entry + __entry->__data_loc_##field)
+		((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 
 #undef __get_str
 #define __get_str(field) (char *)__get_dynamic_array(field)
@@ -263,28 +284,33 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 	
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
-#undef __field
-#define __field(type, item)						\
+#undef __field_ext
+#define __field_ext(type, item, filter_type)				\
 	ret = trace_define_field(event_call, #type, #item,		\
 				 offsetof(typeof(field), item),		\
-				 sizeof(field.item), is_signed_type(type));	\
+				 sizeof(field.item),			\
+				 is_signed_type(type), filter_type);	\
 	if (ret)							\
 		return ret;
 
+#undef __field
+#define __field(type, item)	__field_ext(type, item, FILTER_OTHER)
+
 #undef __array
 #define __array(type, item, len)					\
 	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);				\
 	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
 				 offsetof(typeof(field), item),		\
-				 sizeof(field.item), 0);		\
+				 sizeof(field.item), 0, FILTER_OTHER);	\
 	if (ret)							\
 		return ret;
 
 #undef __dynamic_array
 #define __dynamic_array(type, item, len)				       \
-	ret = trace_define_field(event_call, "__data_loc" "[" #type "]", #item,\
-				offsetof(typeof(field), __data_loc_##item),    \
-				 sizeof(field.__data_loc_##item), 0);
+	ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
+				 offsetof(typeof(field), __data_loc_##item),   \
+				 sizeof(field.__data_loc_##item), 0,	       \
+				 FILTER_OTHER);
 
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)
@@ -292,17 +318,14 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 #undef TRACE_EVENT
 #define TRACE_EVENT(call, proto, args, tstruct, func, print)		\
 int									\
-ftrace_define_fields_##call(void)					\
+ftrace_define_fields_##call(struct ftrace_event_call *event_call)	\
 {									\
 	struct ftrace_raw_##call field;					\
-	struct ftrace_event_call *event_call = &event_##call;		\
 	int ret;							\
 									\
-	__common_field(int, type, 1);					\
-	__common_field(unsigned char, flags, 0);			\
-	__common_field(unsigned char, preempt_count, 0);		\
-	__common_field(int, pid, 1);					\
-	__common_field(int, tgid, 1);					\
+	ret = trace_define_common_fields(event_call);			\
+	if (ret)							\
+		return ret;						\
 									\
 	tstruct;							\
 									\
@@ -321,6 +344,9 @@ ftrace_define_fields_##call(void)					\
 #undef __field
 #define __field(type, item)
 
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
+
 #undef __array
 #define __array(type, item, len)
 
@@ -328,6 +354,7 @@ ftrace_define_fields_##call(void)					\
 #define __dynamic_array(type, item, len)				\
 	__data_offsets->item = __data_size +				\
 			       offsetof(typeof(*entry), __data);	\
+	__data_offsets->item |= (len * sizeof(type)) << 16;		\
 	__data_size += (len) * sizeof(type);
 
 #undef __string
@@ -433,13 +460,15 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
  * {
  *	struct ring_buffer_event *event;
  *	struct ftrace_raw_<call> *entry; <-- defined in stage 1
+ *	struct ring_buffer *buffer;
  *	unsigned long irq_flags;
  *	int pc;
  *
  *	local_save_flags(irq_flags);
  *	pc = preempt_count();
  *
- *	event = trace_current_buffer_lock_reserve(event_<call>.id,
+ *	event = trace_current_buffer_lock_reserve(&buffer,
+ *				  event_<call>.id,
  *				  sizeof(struct ftrace_raw_<call>),
  *				  irq_flags, pc);
  *	if (!event)
@@ -449,7 +478,7 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
  *	<assign>;  <-- Here we assign the entries by the __field and
  *			__array macros.
  *
- *	trace_current_buffer_unlock_commit(event, irq_flags, pc);
+ *	trace_current_buffer_unlock_commit(buffer, event, irq_flags, pc);
  * }
  *
  * static int ftrace_raw_reg_event_<call>(void)
@@ -541,6 +570,7 @@ static void ftrace_raw_event_##call(proto)				\
 	struct ftrace_event_call *event_call = &event_##call;		\
 	struct ring_buffer_event *event;				\
 	struct ftrace_raw_##call *entry;				\
+	struct ring_buffer *buffer;					\
 	unsigned long irq_flags;					\
 	int __data_size;						\
 	int pc;								\
@@ -550,7 +580,8 @@ static void ftrace_raw_event_##call(proto)				\
 									\
 	__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 									\
-	event = trace_current_buffer_lock_reserve(event_##call.id,	\
+	event = trace_current_buffer_lock_reserve(&buffer,		\
+				 event_##call.id,			\
 				 sizeof(*entry) + __data_size,		\
 				 irq_flags, pc);			\
 	if (!event)							\
@@ -562,11 +593,12 @@ static void ftrace_raw_event_##call(proto)				\
 									\
 	{ assign; }							\
 									\
-	if (!filter_current_check_discard(event_call, entry, event))	\
-		trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
+	if (!filter_current_check_discard(buffer, event_call, entry, event)) \
+		trace_nowake_buffer_unlock_commit(buffer,		\
+						  event, irq_flags, pc); \
 }									\
 									\
-static int ftrace_raw_reg_event_##call(void)				\
+static int ftrace_raw_reg_event_##call(void *ptr)			\
 {									\
 	int ret;							\
 									\
@@ -577,7 +609,7 @@ static int ftrace_raw_reg_event_##call(void)				\
 	return ret;							\
 }									\
 									\
-static void ftrace_raw_unreg_event_##call(void)				\
+static void ftrace_raw_unreg_event_##call(void *ptr)			\
 {									\
 	unregister_trace_##call(ftrace_raw_event_##call);		\
 }									\
@@ -595,7 +627,6 @@ static int ftrace_raw_init_event_##call(void)				\
 		return -ENODEV;						\
 	event_##call.id = id;						\
 	INIT_LIST_HEAD(&event_##call.fields);				\
-	init_preds(&event_##call);					\
 	return 0;							\
 }									\
 									\
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 8cfe515..5dc283b 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -1,8 +1,13 @@
 #ifndef _TRACE_SYSCALL_H
 #define _TRACE_SYSCALL_H
 
+#include <linux/tracepoint.h>
+#include <linux/unistd.h>
+#include <linux/ftrace_event.h>
+
 #include <asm/ptrace.h>
 
+
 /*
  * A syscall entry in the ftrace syscalls array.
  *
@@ -10,26 +15,49 @@
  * @nb_args: number of parameters it takes
  * @types: list of types as strings
  * @args: list of args as strings (args[i] matches types[i])
+ * @enter_id: associated ftrace enter event id
+ * @exit_id: associated ftrace exit event id
+ * @enter_event: associated syscall_enter trace event
+ * @exit_event: associated syscall_exit trace event
  */
 struct syscall_metadata {
 	const char	*name;
 	int		nb_args;
 	const char	**types;
 	const char	**args;
+	int		enter_id;
+	int		exit_id;
+
+	struct ftrace_event_call *enter_event;
+	struct ftrace_event_call *exit_event;
 };
 
 #ifdef CONFIG_FTRACE_SYSCALLS
-extern void arch_init_ftrace_syscalls(void);
 extern struct syscall_metadata *syscall_nr_to_meta(int nr);
-extern void start_ftrace_syscalls(void);
-extern void stop_ftrace_syscalls(void);
-extern void ftrace_syscall_enter(struct pt_regs *regs);
-extern void ftrace_syscall_exit(struct pt_regs *regs);
-#else
-static inline void start_ftrace_syscalls(void)			{ }
-static inline void stop_ftrace_syscalls(void)			{ }
-static inline void ftrace_syscall_enter(struct pt_regs *regs)	{ }
-static inline void ftrace_syscall_exit(struct pt_regs *regs)	{ }
+extern int syscall_name_to_nr(char *name);
+void set_syscall_enter_id(int num, int id);
+void set_syscall_exit_id(int num, int id);
+extern struct trace_event event_syscall_enter;
+extern struct trace_event event_syscall_exit;
+extern int reg_event_syscall_enter(void *ptr);
+extern void unreg_event_syscall_enter(void *ptr);
+extern int reg_event_syscall_exit(void *ptr);
+extern void unreg_event_syscall_exit(void *ptr);
+extern int syscall_enter_format(struct ftrace_event_call *call,
+				struct trace_seq *s);
+extern int syscall_exit_format(struct ftrace_event_call *call,
+				struct trace_seq *s);
+extern int syscall_enter_define_fields(struct ftrace_event_call *call);
+extern int syscall_exit_define_fields(struct ftrace_event_call *call);
+enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
+enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
+#endif
+#ifdef CONFIG_EVENT_PROFILE
+int reg_prof_syscall_enter(char *name);
+void unreg_prof_syscall_enter(char *name);
+int reg_prof_syscall_exit(char *name);
+void unreg_prof_syscall_exit(char *name);
+
 #endif
 
 #endif /* _TRACE_SYSCALL_H */