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Merge branch 'tip/tracing/core-7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core

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This commit is contained in:
Ingo Molnar 2010-05-21 17:53:06 +02:00
commit f80836c86e
28 changed files with 908 additions and 612 deletions
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82
include/linux/ftrace_event.h
View File

@ -70,18 +70,25 @@ struct trace_iterator {
};
struct trace_event;
typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
int flags);
struct trace_event {
struct hlist_node node;
struct list_head list;
int type;
int flags, struct trace_event *event);
struct trace_event_functions {
trace_print_func trace;
trace_print_func raw;
trace_print_func hex;
trace_print_func binary;
};
struct trace_event {
struct hlist_node node;
struct list_head list;
int type;
struct trace_event_functions *funcs;
};
extern int register_ftrace_event(struct trace_event *event);
extern int unregister_ftrace_event(struct trace_event *event);
@ -113,29 +120,70 @@ void tracing_record_cmdline(struct task_struct *tsk);
struct event_filter;
enum trace_reg {
TRACE_REG_REGISTER,
TRACE_REG_UNREGISTER,
TRACE_REG_PERF_REGISTER,
TRACE_REG_PERF_UNREGISTER,
};
struct ftrace_event_call;
struct ftrace_event_class {
char *system;
void *probe;
#ifdef CONFIG_PERF_EVENTS
void *perf_probe;
#endif
int (*reg)(struct ftrace_event_call *event,
enum trace_reg type);
int (*define_fields)(struct ftrace_event_call *);
struct list_head *(*get_fields)(struct ftrace_event_call *);
struct list_head fields;
int (*raw_init)(struct ftrace_event_call *);
};
enum {
TRACE_EVENT_FL_ENABLED_BIT,
TRACE_EVENT_FL_FILTERED_BIT,
};
enum {
TRACE_EVENT_FL_ENABLED = (1 << TRACE_EVENT_FL_ENABLED_BIT),
TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
};
struct ftrace_event_call {
struct list_head list;
struct ftrace_event_class *class;
char *name;
char *system;
struct dentry *dir;
struct trace_event *event;
int enabled;
int (*regfunc)(struct ftrace_event_call *);
void (*unregfunc)(struct ftrace_event_call *);
int id;
struct trace_event event;
const char *print_fmt;
int (*raw_init)(struct ftrace_event_call *);
int (*define_fields)(struct ftrace_event_call *);
struct list_head fields;
int filter_active;
struct event_filter *filter;
void *mod;
void *data;
/*
* 32 bit flags:
* bit 1: enabled
* bit 2: filter_active
*
* Changes to flags must hold the event_mutex.
*
* Note: Reads of flags do not hold the event_mutex since
* they occur in critical sections. But the way flags
* is currently used, these changes do no affect the code
* except that when a change is made, it may have a slight
* delay in propagating the changes to other CPUs due to
* caching and such.
*/
unsigned int flags;
#ifdef CONFIG_PERF_EVENTS
int perf_refcount;
struct hlist_head *perf_events;
int (*perf_event_enable)(struct ftrace_event_call *);
void (*perf_event_disable)(struct ftrace_event_call *);
#endif
};
#define PERF_MAX_TRACE_SIZE 2048

57
include/linux/syscalls.h
View File

@ -103,22 +103,6 @@ struct perf_event_attr;
#define __SC_TEST5(t5, a5, ...) __SC_TEST(t5); __SC_TEST4(__VA_ARGS__)
#define __SC_TEST6(t6, a6, ...) __SC_TEST(t6); __SC_TEST5(__VA_ARGS__)
#ifdef CONFIG_PERF_EVENTS
#define TRACE_SYS_ENTER_PERF_INIT(sname) \
.perf_event_enable = perf_sysenter_enable, \
.perf_event_disable = perf_sysenter_disable,
#define TRACE_SYS_EXIT_PERF_INIT(sname) \
.perf_event_enable = perf_sysexit_enable, \
.perf_event_disable = perf_sysexit_disable,
#else
#define TRACE_SYS_ENTER_PERF(sname)
#define TRACE_SYS_ENTER_PERF_INIT(sname)
#define TRACE_SYS_EXIT_PERF(sname)
#define TRACE_SYS_EXIT_PERF_INIT(sname)
#endif /* CONFIG_PERF_EVENTS */
#ifdef CONFIG_FTRACE_SYSCALLS
#define __SC_STR_ADECL1(t, a) #a
#define __SC_STR_ADECL2(t, a, ...) #a, __SC_STR_ADECL1(__VA_ARGS__)
@ -134,54 +118,43 @@ struct perf_event_attr;
#define __SC_STR_TDECL5(t, a, ...) #t, __SC_STR_TDECL4(__VA_ARGS__)
#define __SC_STR_TDECL6(t, a, ...) #t, __SC_STR_TDECL5(__VA_ARGS__)
extern struct ftrace_event_class event_class_syscall_enter;
extern struct ftrace_event_class event_class_syscall_exit;
extern struct trace_event_functions enter_syscall_print_funcs;
extern struct trace_event_functions exit_syscall_print_funcs;
#define SYSCALL_TRACE_ENTER_EVENT(sname) \
static const struct syscall_metadata __syscall_meta_##sname; \
static struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call \
__attribute__((__aligned__(4))) event_enter_##sname; \
static struct trace_event enter_syscall_print_##sname = { \
.trace = print_syscall_enter, \
}; \
static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) \
event_enter_##sname = { \
.name = "sys_enter"#sname, \
.system = "syscalls", \
.event = &enter_syscall_print_##sname, \
.raw_init = init_syscall_trace, \
.define_fields = syscall_enter_define_fields, \
.regfunc = reg_event_syscall_enter, \
.unregfunc = unreg_event_syscall_enter, \
.class = &event_class_syscall_enter, \
.event.funcs = &enter_syscall_print_funcs, \
.data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_ENTER_PERF_INIT(sname) \
}
#define SYSCALL_TRACE_EXIT_EVENT(sname) \
static const struct syscall_metadata __syscall_meta_##sname; \
static struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call \
__attribute__((__aligned__(4))) event_exit_##sname; \
static struct trace_event exit_syscall_print_##sname = { \
.trace = print_syscall_exit, \
}; \
static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) \
event_exit_##sname = { \
.name = "sys_exit"#sname, \
.system = "syscalls", \
.event = &exit_syscall_print_##sname, \
.raw_init = init_syscall_trace, \
.define_fields = syscall_exit_define_fields, \
.regfunc = reg_event_syscall_exit, \
.unregfunc = unreg_event_syscall_exit, \
.class = &event_class_syscall_exit, \
.event.funcs = &exit_syscall_print_funcs, \
.data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_EXIT_PERF_INIT(sname) \
}
#define SYSCALL_METADATA(sname, nb) \
SYSCALL_TRACE_ENTER_EVENT(sname); \
SYSCALL_TRACE_EXIT_EVENT(sname); \
static const struct syscall_metadata __used \
static struct syscall_metadata __used \
__attribute__((__aligned__(4))) \
__attribute__((section("__syscalls_metadata"))) \
__syscall_meta_##sname = { \
@ -191,12 +164,14 @@ struct perf_event_attr;
.args = args_##sname, \
.enter_event = &event_enter_##sname, \
.exit_event = &event_exit_##sname, \
.enter_fields = LIST_HEAD_INIT(__syscall_meta_##sname.enter_fields), \
.exit_fields = LIST_HEAD_INIT(__syscall_meta_##sname.exit_fields), \
};
#define SYSCALL_DEFINE0(sname) \
SYSCALL_TRACE_ENTER_EVENT(_##sname); \
SYSCALL_TRACE_EXIT_EVENT(_##sname); \
static const struct syscall_metadata __used \
static struct syscall_metadata __used \
__attribute__((__aligned__(4))) \
__attribute__((section("__syscalls_metadata"))) \
__syscall_meta__##sname = { \
@ -204,6 +179,8 @@ struct perf_event_attr;
.nb_args = 0, \
.enter_event = &event_enter__##sname, \
.exit_event = &event_exit__##sname, \
.enter_fields = LIST_HEAD_INIT(__syscall_meta__##sname.enter_fields), \
.exit_fields = LIST_HEAD_INIT(__syscall_meta__##sname.exit_fields), \
}; \
asmlinkage long sys_##sname(void)
#else

98
include/linux/tracepoint.h
View File

@ -20,12 +20,17 @@
struct module;
struct tracepoint;
struct tracepoint_func {
void *func;
void *data;
};
struct tracepoint {
const char *name; /* Tracepoint name */
int state; /* State. */
void (*regfunc)(void);
void (*unregfunc)(void);
void **funcs;
struct tracepoint_func *funcs;
} __attribute__((aligned(32))); /*
* Aligned on 32 bytes because it is
* globally visible and gcc happily
@ -37,16 +42,19 @@ struct tracepoint {
* Connect a probe to a tracepoint.
* Internal API, should not be used directly.
*/
extern int tracepoint_probe_register(const char *name, void *probe);
extern int tracepoint_probe_register(const char *name, void *probe, void *data);
/*
* Disconnect a probe from a tracepoint.
* Internal API, should not be used directly.
*/
extern int tracepoint_probe_unregister(const char *name, void *probe);
extern int
tracepoint_probe_unregister(const char *name, void *probe, void *data);
extern int tracepoint_probe_register_noupdate(const char *name, void *probe);
extern int tracepoint_probe_unregister_noupdate(const char *name, void *probe);
extern int tracepoint_probe_register_noupdate(const char *name, void *probe,
void *data);
extern int tracepoint_probe_unregister_noupdate(const char *name, void *probe,
void *data);
extern void tracepoint_probe_update_all(void);
struct tracepoint_iter {
@ -102,17 +110,27 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
/*
* it_func[0] is never NULL because there is at least one element in the array
* when the array itself is non NULL.
*
* Note, the proto and args passed in includes "__data" as the first parameter.
* The reason for this is to handle the "void" prototype. If a tracepoint
* has a "void" prototype, then it is invalid to declare a function
* as "(void *, void)". The DECLARE_TRACE_NOARGS() will pass in just
* "void *data", where as the DECLARE_TRACE() will pass in "void *data, proto".
*/
#define __DO_TRACE(tp, proto, args) \
do { \
void **it_func; \
struct tracepoint_func *it_func_ptr; \
void *it_func; \
void *__data; \
\
rcu_read_lock_sched_notrace(); \
it_func = rcu_dereference_sched((tp)->funcs); \
if (it_func) { \
it_func_ptr = rcu_dereference_sched((tp)->funcs); \
if (it_func_ptr) { \
do { \
((void(*)(proto))(*it_func))(args); \
} while (*(++it_func)); \
it_func = (it_func_ptr)->func; \
__data = (it_func_ptr)->data; \
((void(*)(proto))(it_func))(args); \
} while ((++it_func_ptr)->func); \
} \
rcu_read_unlock_sched_notrace(); \
} while (0)
@ -122,24 +140,32 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
* not add unwanted padding between the beginning of the section and the
* structure. Force alignment to the same alignment as the section start.
*/
#define DECLARE_TRACE(name, proto, args) \
#define __DECLARE_TRACE(name, proto, args, data_proto, data_args) \
extern struct tracepoint __tracepoint_##name; \
static inline void trace_##name(proto) \
{ \
if (unlikely(__tracepoint_##name.state)) \
__DO_TRACE(&__tracepoint_##name, \
TP_PROTO(proto), TP_ARGS(args)); \
TP_PROTO(data_proto), \
TP_ARGS(data_args)); \
} \
static inline int register_trace_##name(void (*probe)(proto)) \
static inline int \
register_trace_##name(void (*probe)(data_proto), void *data) \
{ \
return tracepoint_probe_register(#name, (void *)probe); \
return tracepoint_probe_register(#name, (void *)probe, \
data); \
} \
static inline int unregister_trace_##name(void (*probe)(proto)) \
static inline int \
unregister_trace_##name(void (*probe)(data_proto), void *data) \
{ \
return tracepoint_probe_unregister(#name, (void *)probe, \
data); \
} \
static inline void \
check_trace_callback_type_##name(void (*cb)(data_proto)) \
{ \
return tracepoint_probe_unregister(#name, (void *)probe);\
}
#define DEFINE_TRACE_FN(name, reg, unreg) \
static const char __tpstrtab_##name[] \
__attribute__((section("__tracepoints_strings"))) = #name; \
@ -156,18 +182,23 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
EXPORT_SYMBOL(__tracepoint_##name)
#else /* !CONFIG_TRACEPOINTS */
#define DECLARE_TRACE(name, proto, args) \
static inline void _do_trace_##name(struct tracepoint *tp, proto) \
{ } \
#define __DECLARE_TRACE(name, proto, args, data_proto, data_args) \
static inline void trace_##name(proto) \
{ } \
static inline int register_trace_##name(void (*probe)(proto)) \
static inline int \
register_trace_##name(void (*probe)(data_proto), \
void *data) \
{ \
return -ENOSYS; \
} \
static inline int unregister_trace_##name(void (*probe)(proto)) \
static inline int \
unregister_trace_##name(void (*probe)(data_proto), \
void *data) \
{ \
return -ENOSYS; \
} \
static inline void check_trace_callback_type_##name(void (*cb)(data_proto)) \
{ \
}
#define DEFINE_TRACE_FN(name, reg, unreg)
@ -176,6 +207,29 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
#define EXPORT_TRACEPOINT_SYMBOL(name)
#endif /* CONFIG_TRACEPOINTS */
/*
* The need for the DECLARE_TRACE_NOARGS() is to handle the prototype
* (void). "void" is a special value in a function prototype and can
* not be combined with other arguments. Since the DECLARE_TRACE()
* macro adds a data element at the beginning of the prototype,
* we need a way to differentiate "(void *data, proto)" from
* "(void *data, void)". The second prototype is invalid.
*
* DECLARE_TRACE_NOARGS() passes "void" as the tracepoint prototype
* and "void *__data" as the callback prototype.
*
* DECLARE_TRACE() passes "proto" as the tracepoint protoype and
* "void *__data, proto" as the callback prototype.
*/
#define DECLARE_TRACE_NOARGS(name) \
__DECLARE_TRACE(name, void, , void *__data, __data)
#define DECLARE_TRACE(name, proto, args) \
__DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), \
PARAMS(void *__data, proto), \
PARAMS(__data, args))
#endif /* DECLARE_TRACE */
#ifndef TRACE_EVENT

239
include/trace/ftrace.h
View File

@ -62,7 +62,10 @@
struct trace_entry ent; \
tstruct \
char __data[0]; \
};
}; \
\
static struct ftrace_event_class event_class_##name;
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, name, proto, args) \
static struct ftrace_event_call \
@ -147,7 +150,7 @@
*
* entry = iter->ent;
*
* if (entry->type != event_<call>.id) {
* if (entry->type != event_<call>->event.type) {
* WARN_ON_ONCE(1);
* return TRACE_TYPE_UNHANDLED;
* }
@ -203,18 +206,22 @@
#undef DECLARE_EVENT_CLASS
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static notrace enum print_line_t \
ftrace_raw_output_id_##call(int event_id, const char *name, \
struct trace_iterator *iter, int flags) \
ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
struct trace_event *trace_event) \
{ \
struct ftrace_event_call *event; \
struct trace_seq *s = &iter->seq; \
struct ftrace_raw_##call *field; \
struct trace_entry *entry; \
struct trace_seq *p; \
int ret; \
\
event = container_of(trace_event, struct ftrace_event_call, \
event); \
\
entry = iter->ent; \
\
if (entry->type != event_id) { \
if (entry->type != event->event.type) { \
WARN_ON_ONCE(1); \
return TRACE_TYPE_UNHANDLED; \
} \
@ -223,7 +230,7 @@ ftrace_raw_output_id_##call(int event_id, const char *name, \
\
p = &get_cpu_var(ftrace_event_seq); \
trace_seq_init(p); \
ret = trace_seq_printf(s, "%s: ", name); \
ret = trace_seq_printf(s, "%s: ", event->name); \
if (ret) \
ret = trace_seq_printf(s, print); \
put_cpu(); \
@ -231,21 +238,16 @@ ftrace_raw_output_id_##call(int event_id, const char *name, \
return TRACE_TYPE_PARTIAL_LINE; \
\
return TRACE_TYPE_HANDLED; \
}
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, name, proto, args) \
static notrace enum print_line_t \
ftrace_raw_output_##name(struct trace_iterator *iter, int flags) \
{ \
return ftrace_raw_output_id_##template(event_##name.id, \
#name, iter, flags); \
}
} \
static struct trace_event_functions ftrace_event_type_funcs_##call = { \
.trace = ftrace_raw_output_##call, \
};
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
static notrace enum print_line_t \
ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
struct trace_event *event) \
{ \
struct trace_seq *s = &iter->seq; \
struct ftrace_raw_##template *field; \
@ -255,7 +257,7 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
\
entry = iter->ent; \
\
if (entry->type != event_##call.id) { \
if (entry->type != event_##call.event.type) { \
WARN_ON_ONCE(1); \
return TRACE_TYPE_UNHANDLED; \
} \
@ -272,7 +274,10 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
return TRACE_TYPE_PARTIAL_LINE; \
\
return TRACE_TYPE_HANDLED; \
}
} \
static struct trace_event_functions ftrace_event_type_funcs_##call = { \
.trace = ftrace_raw_output_##call, \
};
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
@ -378,80 +383,18 @@ static inline notrace int ftrace_get_offsets_##call( \
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#ifdef CONFIG_PERF_EVENTS
/*
* Generate the functions needed for tracepoint perf_event support.
*
* NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later
*
* static int ftrace_profile_enable_<call>(void)
* {
* return register_trace_<call>(ftrace_profile_<call>);
* }
*
* static void ftrace_profile_disable_<call>(void)
* {
* unregister_trace_<call>(ftrace_profile_<call>);
* }
*
*/
#undef DECLARE_EVENT_CLASS
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, name, proto, args) \
\
static void perf_trace_##name(proto); \
\
static notrace int \
perf_trace_enable_##name(struct ftrace_event_call *unused) \
{ \
return register_trace_##name(perf_trace_##name); \
} \
\
static notrace void \
perf_trace_disable_##name(struct ftrace_event_call *unused) \
{ \
unregister_trace_##name(perf_trace_##name); \
}
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#endif /* CONFIG_PERF_EVENTS */
/*
* Stage 4 of the trace events.
*
* Override the macros in <trace/trace_events.h> to include the following:
*
* static void ftrace_event_<call>(proto)
* {
* event_trace_printk(_RET_IP_, "<call>: " <fmt>);
* }
*
* static int ftrace_reg_event_<call>(struct ftrace_event_call *unused)
* {
* return register_trace_<call>(ftrace_event_<call>);
* }
*
* static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
* {
* unregister_trace_<call>(ftrace_event_<call>);
* }
*
*
* For those macros defined with TRACE_EVENT:
*
* static struct ftrace_event_call event_<call>;
*
* static void ftrace_raw_event_<call>(proto)
* static void ftrace_raw_event_<call>(void *__data, proto)
* {
* struct ftrace_event_call *event_call = __data;
* struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
* struct ring_buffer_event *event;
* struct ftrace_raw_<call> *entry; <-- defined in stage 1
@ -466,7 +409,7 @@ perf_trace_disable_##name(struct ftrace_event_call *unused) \
* __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
*
* event = trace_current_buffer_lock_reserve(&buffer,
* event_<call>.id,
* event_<call>->event.type,
* sizeof(*entry) + __data_size,
* irq_flags, pc);
* if (!event)
@ -481,43 +424,42 @@ perf_trace_disable_##name(struct ftrace_event_call *unused) \
* event, irq_flags, pc);
* }
*
* static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused)
* {
* return register_trace_<call>(ftrace_raw_event_<call>);
* }
*
* static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
* {
* unregister_trace_<call>(ftrace_raw_event_<call>);
* }
*
* static struct trace_event ftrace_event_type_<call> = {
* .trace = ftrace_raw_output_<call>, <-- stage 2
* };
*
* static const char print_fmt_<call>[] = <TP_printk>;
*
* static struct ftrace_event_class __used event_class_<template> = {
* .system = "<system>",
* .define_fields = ftrace_define_fields_<call>,
* .fields = LIST_HEAD_INIT(event_class_##call.fields),
* .raw_init = trace_event_raw_init,
* .probe = ftrace_raw_event_##call,
* };
*
* static struct ftrace_event_call __used
* __attribute__((__aligned__(4)))
* __attribute__((section("_ftrace_events"))) event_<call> = {
* .name = "<call>",
* .system = "<system>",
* .raw_init = trace_event_raw_init,
* .regfunc = ftrace_reg_event_<call>,
* .unregfunc = ftrace_unreg_event_<call>,
* .class = event_class_<template>,
* .event = &ftrace_event_type_<call>,
* .print_fmt = print_fmt_<call>,
* .define_fields = ftrace_define_fields_<call>,
* }
* };
*
*/
#ifdef CONFIG_PERF_EVENTS
#define _TRACE_PERF_PROTO(call, proto) \
static notrace void \
perf_trace_##call(void *__data, proto);
#define _TRACE_PERF_INIT(call) \
.perf_event_enable = perf_trace_enable_##call, \
.perf_event_disable = perf_trace_disable_##call,
.perf_probe = perf_trace_##call,
#else
#define _TRACE_PERF_PROTO(call, proto)
#define _TRACE_PERF_INIT(call)
#endif /* CONFIG_PERF_EVENTS */
@ -551,9 +493,9 @@ perf_trace_disable_##name(struct ftrace_event_call *unused) \
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
\
static notrace void \
ftrace_raw_event_id_##call(struct ftrace_event_call *event_call, \
proto) \
ftrace_raw_event_##call(void *__data, proto) \
{ \
struct ftrace_event_call *event_call = __data; \
struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
struct ring_buffer_event *event; \
struct ftrace_raw_##call *entry; \
@ -568,7 +510,7 @@ ftrace_raw_event_id_##call(struct ftrace_event_call *event_call, \
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
\
event = trace_current_buffer_lock_reserve(&buffer, \
event_call->id, \
event_call->event.type, \
sizeof(*entry) + __data_size, \
irq_flags, pc); \
if (!event) \
@ -583,34 +525,21 @@ ftrace_raw_event_id_##call(struct ftrace_event_call *event_call, \
trace_nowake_buffer_unlock_commit(buffer, \
event, irq_flags, pc); \
}
/*
* The ftrace_test_probe is compiled out, it is only here as a build time check
* to make sure that if the tracepoint handling changes, the ftrace probe will
* fail to compile unless it too is updated.
*/
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, call, proto, args) \
\
static notrace void ftrace_raw_event_##call(proto) \
static inline void ftrace_test_probe_##call(void) \
{ \
ftrace_raw_event_id_##template(&event_##call, args); \
} \
\
static notrace int \
ftrace_raw_reg_event_##call(struct ftrace_event_call *unused) \
{ \
return register_trace_##call(ftrace_raw_event_##call); \
} \
\
static notrace void \
ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused) \
{ \
unregister_trace_##call(ftrace_raw_event_##call); \
} \
\
static struct trace_event ftrace_event_type_##call = { \
.trace = ftrace_raw_output_##call, \
};
check_trace_callback_type_##call(ftrace_raw_event_##template); \
}
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
@ -627,7 +556,16 @@ static struct trace_event ftrace_event_type_##call = { \
#undef DECLARE_EVENT_CLASS
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static const char print_fmt_##call[] = print;
_TRACE_PERF_PROTO(call, PARAMS(proto)); \
static const char print_fmt_##call[] = print; \
static struct ftrace_event_class __used event_class_##call = { \
.system = __stringify(TRACE_SYSTEM), \
.define_fields = ftrace_define_fields_##call, \
.fields = LIST_HEAD_INIT(event_class_##call.fields),\
.raw_init = trace_event_raw_init, \
.probe = ftrace_raw_event_##call, \
_TRACE_PERF_INIT(call) \
};
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, call, proto, args) \
@ -636,15 +574,10 @@ static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.system = __stringify(TRACE_SYSTEM), \
.event = &ftrace_event_type_##call, \
.raw_init = trace_event_raw_init, \
.regfunc = ftrace_raw_reg_event_##call, \
.unregfunc = ftrace_raw_unreg_event_##call, \
.class = &event_class_##template, \
.event.funcs = &ftrace_event_type_funcs_##template, \
.print_fmt = print_fmt_##template, \
.define_fields = ftrace_define_fields_##template, \
_TRACE_PERF_INIT(call) \
}
};
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
@ -655,14 +588,9 @@ static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.system = __stringify(TRACE_SYSTEM), \
.event = &ftrace_event_type_##call, \
.raw_init = trace_event_raw_init, \
.regfunc = ftrace_raw_reg_event_##call, \
.unregfunc = ftrace_raw_unreg_event_##call, \
.class = &event_class_##template, \
.event.funcs = &ftrace_event_type_funcs_##call, \
.print_fmt = print_fmt_##call, \
.define_fields = ftrace_define_fields_##template, \
_TRACE_PERF_INIT(call) \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
@ -762,17 +690,20 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
#undef DECLARE_EVENT_CLASS
#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static notrace void \
perf_trace_templ_##call(struct ftrace_event_call *event_call, \
struct pt_regs *__regs, proto) \
perf_trace_##call(void *__data, proto) \
{ \
struct ftrace_event_call *event_call = __data; \
struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
struct ftrace_raw_##call *entry; \
struct pt_regs __regs; \
u64 __addr = 0, __count = 1; \
struct hlist_head *head; \
int __entry_size; \
int __data_size; \
int rctx; \
\
perf_fetch_caller_regs(&__regs, 1); \
\
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
__entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
sizeof(u64)); \
@ -783,7 +714,7 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \
return; \
\
entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
__entry_size, event_call->id, __regs, &rctx); \
__entry_size, event_call->event.type, &__regs, &rctx); \
if (!entry) \
return; \
\
@ -793,20 +724,22 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call, \
\
head = per_cpu_ptr(event_call->perf_events, smp_processor_id());\
perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
__count, __regs, head); \
__count, &__regs, head); \
}
/*
* This part is compiled out, it is only here as a build time check
* to make sure that if the tracepoint handling changes, the
* perf probe will fail to compile unless it too is updated.
*/
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, call, proto, args) \
static notrace void perf_trace_##call(proto) \
static inline void perf_test_probe_##call(void) \
{ \
struct ftrace_event_call *event_call = &event_##call; \
struct pt_regs __regs; \
\
perf_fetch_caller_regs(&__regs, 1); \
perf_trace_templ_##template(event_call, &__regs, args); \
check_trace_callback_type_##call(perf_trace_##template); \
}
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))

10
include/trace/syscall.h
View File

@ -25,6 +25,8 @@ struct syscall_metadata {
int nb_args;
const char **types;
const char **args;
struct list_head enter_fields;
struct list_head exit_fields;
struct ftrace_event_call *enter_event;
struct ftrace_event_call *exit_event;
@ -34,16 +36,16 @@ struct syscall_metadata {
extern unsigned long arch_syscall_addr(int nr);
extern int init_syscall_trace(struct ftrace_event_call *call);
extern int syscall_enter_define_fields(struct ftrace_event_call *call);
extern int syscall_exit_define_fields(struct ftrace_event_call *call);
extern int reg_event_syscall_enter(struct ftrace_event_call *call);
extern void unreg_event_syscall_enter(struct ftrace_event_call *call);
extern int reg_event_syscall_exit(struct ftrace_event_call *call);
extern void unreg_event_syscall_exit(struct ftrace_event_call *call);
extern int
ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);
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);
enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags,
struct trace_event *event);
enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags,
struct trace_event *event);
#endif
#ifdef CONFIG_PERF_EVENTS

138
kernel/trace/blktrace.c
View File

@ -675,28 +675,33 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
}
}
static void blk_add_trace_rq_abort(struct request_queue *q, struct request *rq)
static void blk_add_trace_rq_abort(void *ignore,
struct request_queue *q, struct request *rq)
{
blk_add_trace_rq(q, rq, BLK_TA_ABORT);
}
static void blk_add_trace_rq_insert(struct request_queue *q, struct request *rq)
static void blk_add_trace_rq_insert(void *ignore,
struct request_queue *q, struct request *rq)
{
blk_add_trace_rq(q, rq, BLK_TA_INSERT);
}
static void blk_add_trace_rq_issue(struct request_queue *q, struct request *rq)
static void blk_add_trace_rq_issue(void *ignore,
struct request_queue *q, struct request *rq)
{
blk_add_trace_rq(q, rq, BLK_TA_ISSUE);
}
static void blk_add_trace_rq_requeue(struct request_queue *q,
static void blk_add_trace_rq_requeue(void *ignore,
struct request_queue *q,
struct request *rq)
{
blk_add_trace_rq(q, rq, BLK_TA_REQUEUE);
}
static void blk_add_trace_rq_complete(struct request_queue *q,
static void blk_add_trace_rq_complete(void *ignore,
struct request_queue *q,
struct request *rq)
{
blk_add_trace_rq(q, rq, BLK_TA_COMPLETE);
@ -724,34 +729,40 @@ static void blk_add_trace_bio(struct request_queue *q, struct bio *bio,
!bio_flagged(bio, BIO_UPTODATE), 0, NULL);
}
static void blk_add_trace_bio_bounce(struct request_queue *q, struct bio *bio)
static void blk_add_trace_bio_bounce(void *ignore,
struct request_queue *q, struct bio *bio)
{
blk_add_trace_bio(q, bio, BLK_TA_BOUNCE);
}
static void blk_add_trace_bio_complete(struct request_queue *q, struct bio *bio)
static void blk_add_trace_bio_complete(void *ignore,
struct request_queue *q, struct bio *bio)
{
blk_add_trace_bio(q, bio, BLK_TA_COMPLETE);
}
static void blk_add_trace_bio_backmerge(struct request_queue *q,
static void blk_add_trace_bio_backmerge(void *ignore,
struct request_queue *q,
struct bio *bio)
{
blk_add_trace_bio(q, bio, BLK_TA_BACKMERGE);
}
static void blk_add_trace_bio_frontmerge(struct request_queue *q,
static void blk_add_trace_bio_frontmerge(void *ignore,
struct request_queue *q,
struct bio *bio)
{
blk_add_trace_bio(q, bio, BLK_TA_FRONTMERGE);
}
static void blk_add_trace_bio_queue(struct request_queue *q, struct bio *bio)
static void blk_add_trace_bio_queue(void *ignore,
struct request_queue *q, struct bio *bio)
{
blk_add_trace_bio(q, bio, BLK_TA_QUEUE);
}
static void blk_add_trace_getrq(struct request_queue *q,
static void blk_add_trace_getrq(void *ignore,
struct request_queue *q,
struct bio *bio, int rw)
{
if (bio)
@ -765,7 +776,8 @@ static void blk_add_trace_getrq(struct request_queue *q,
}
static void blk_add_trace_sleeprq(struct request_queue *q,
static void blk_add_trace_sleeprq(void *ignore,
struct request_queue *q,
struct bio *bio, int rw)
{
if (bio)
@ -779,7 +791,7 @@ static void blk_add_trace_sleeprq(struct request_queue *q,
}
}
static void blk_add_trace_plug(struct request_queue *q)
static void blk_add_trace_plug(void *ignore, struct request_queue *q)
{
struct blk_trace *bt = q->blk_trace;
@ -787,7 +799,7 @@ static void blk_add_trace_plug(struct request_queue *q)
__blk_add_trace(bt, 0, 0, 0, BLK_TA_PLUG, 0, 0, NULL);
}
static void blk_add_trace_unplug_io(struct request_queue *q)
static void blk_add_trace_unplug_io(void *ignore, struct request_queue *q)
{
struct blk_trace *bt = q->blk_trace;
@ -800,7 +812,7 @@ static void blk_add_trace_unplug_io(struct request_queue *q)
}
}
static void blk_add_trace_unplug_timer(struct request_queue *q)
static void blk_add_trace_unplug_timer(void *ignore, struct request_queue *q)
{
struct blk_trace *bt = q->blk_trace;
@ -813,7 +825,8 @@ static void blk_add_trace_unplug_timer(struct request_queue *q)
}
}
static void blk_add_trace_split(struct request_queue *q, struct bio *bio,
static void blk_add_trace_split(void *ignore,
struct request_queue *q, struct bio *bio,
unsigned int pdu)
{
struct blk_trace *bt = q->blk_trace;
@ -839,8 +852,9 @@ static void blk_add_trace_split(struct request_queue *q, struct bio *bio,
* it spans a stripe (or similar). Add a trace for that action.
*
**/
static void blk_add_trace_remap(struct request_queue *q, struct bio *bio,
dev_t dev, sector_t from)
static void blk_add_trace_remap(void *ignore,
struct request_queue *q, struct bio *bio,
dev_t dev, sector_t from)
{
struct blk_trace *bt = q->blk_trace;
struct blk_io_trace_remap r;
@ -869,7 +883,8 @@ static void blk_add_trace_remap(struct request_queue *q, struct bio *bio,
* Add a trace for that action.
*
**/
static void blk_add_trace_rq_remap(struct request_queue *q,
static void blk_add_trace_rq_remap(void *ignore,
struct request_queue *q,
struct request *rq, dev_t dev,
sector_t from)
{
@ -921,64 +936,64 @@ static void blk_register_tracepoints(void)
{
int ret;
ret = register_trace_block_rq_abort(blk_add_trace_rq_abort);
ret = register_trace_block_rq_abort(blk_add_trace_rq_abort, NULL);
WARN_ON(ret);
ret = register_trace_block_rq_insert(blk_add_trace_rq_insert);
ret = register_trace_block_rq_insert(blk_add_trace_rq_insert, NULL);
WARN_ON(ret);
ret = register_trace_block_rq_issue(blk_add_trace_rq_issue);
ret = register_trace_block_rq_issue(blk_add_trace_rq_issue, NULL);
WARN_ON(ret);
ret = register_trace_block_rq_requeue(blk_add_trace_rq_requeue);
ret = register_trace_block_rq_requeue(blk_add_trace_rq_requeue, NULL);
WARN_ON(ret);
ret = register_trace_block_rq_complete(blk_add_trace_rq_complete);
ret = register_trace_block_rq_complete(blk_add_trace_rq_complete, NULL);
WARN_ON(ret);
ret = register_trace_block_bio_bounce(blk_add_trace_bio_bounce);
ret = register_trace_block_bio_bounce(blk_add_trace_bio_bounce, NULL);
WARN_ON(ret);
ret = register_trace_block_bio_complete(blk_add_trace_bio_complete);
ret = register_trace_block_bio_complete(blk_add_trace_bio_complete, NULL);
WARN_ON(ret);
ret = register_trace_block_bio_backmerge(blk_add_trace_bio_backmerge);
ret = register_trace_block_bio_backmerge(blk_add_trace_bio_backmerge, NULL);
WARN_ON(ret);
ret = register_trace_block_bio_frontmerge(blk_add_trace_bio_frontmerge);
ret = register_trace_block_bio_frontmerge(blk_add_trace_bio_frontmerge, NULL);
WARN_ON(ret);
ret = register_trace_block_bio_queue(blk_add_trace_bio_queue);
ret = register_trace_block_bio_queue(blk_add_trace_bio_queue, NULL);
WARN_ON(ret);
ret = register_trace_block_getrq(blk_add_trace_getrq);
ret = register_trace_block_getrq(blk_add_trace_getrq, NULL);
WARN_ON(ret);
ret = register_trace_block_sleeprq(blk_add_trace_sleeprq);
ret = register_trace_block_sleeprq(blk_add_trace_sleeprq, NULL);
WARN_ON(ret);
ret = register_trace_block_plug(blk_add_trace_plug);
ret = register_trace_block_plug(blk_add_trace_plug, NULL);
WARN_ON(ret);
ret = register_trace_block_unplug_timer(blk_add_trace_unplug_timer);
ret = register_trace_block_unplug_timer(blk_add_trace_unplug_timer, NULL);
WARN_ON(ret);
ret = register_trace_block_unplug_io(blk_add_trace_unplug_io);
ret = register_trace_block_unplug_io(blk_add_trace_unplug_io, NULL);
WARN_ON(ret);
ret = register_trace_block_split(blk_add_trace_split);
ret = register_trace_block_split(blk_add_trace_split, NULL);
WARN_ON(ret);
ret = register_trace_block_remap(blk_add_trace_remap);
ret = register_trace_block_remap(blk_add_trace_remap, NULL);
WARN_ON(ret);
ret = register_trace_block_rq_remap(blk_add_trace_rq_remap);
ret = register_trace_block_rq_remap(blk_add_trace_rq_remap, NULL);
WARN_ON(ret);
}
static void blk_unregister_tracepoints(void)
{
unregister_trace_block_rq_remap(blk_add_trace_rq_remap);
unregister_trace_block_remap(blk_add_trace_remap);
unregister_trace_block_split(blk_add_trace_split);
unregister_trace_block_unplug_io(blk_add_trace_unplug_io);
unregister_trace_block_unplug_timer(blk_add_trace_unplug_timer);
unregister_trace_block_plug(blk_add_trace_plug);
unregister_trace_block_sleeprq(blk_add_trace_sleeprq);
unregister_trace_block_getrq(blk_add_trace_getrq);
unregister_trace_block_bio_queue(blk_add_trace_bio_queue);
unregister_trace_block_bio_frontmerge(blk_add_trace_bio_frontmerge);
unregister_trace_block_bio_backmerge(blk_add_trace_bio_backmerge);
unregister_trace_block_bio_complete(blk_add_trace_bio_complete);
unregister_trace_block_bio_bounce(blk_add_trace_bio_bounce);
unregister_trace_block_rq_complete(blk_add_trace_rq_complete);
unregister_trace_block_rq_requeue(blk_add_trace_rq_requeue);
unregister_trace_block_rq_issue(blk_add_trace_rq_issue);
unregister_trace_block_rq_insert(blk_add_trace_rq_insert);
unregister_trace_block_rq_abort(blk_add_trace_rq_abort);
unregister_trace_block_rq_remap(blk_add_trace_rq_remap, NULL);
unregister_trace_block_remap(blk_add_trace_remap, NULL);
unregister_trace_block_split(blk_add_trace_split, NULL);
unregister_trace_block_unplug_io(blk_add_trace_unplug_io, NULL);
unregister_trace_block_unplug_timer(blk_add_trace_unplug_timer, NULL);
unregister_trace_block_plug(blk_add_trace_plug, NULL);
unregister_trace_block_sleeprq(blk_add_trace_sleeprq, NULL);
unregister_trace_block_getrq(blk_add_trace_getrq, NULL);
unregister_trace_block_bio_queue(blk_add_trace_bio_queue, NULL);
unregister_trace_block_bio_frontmerge(blk_add_trace_bio_frontmerge, NULL);
unregister_trace_block_bio_backmerge(blk_add_trace_bio_backmerge, NULL);
unregister_trace_block_bio_complete(blk_add_trace_bio_complete, NULL);
unregister_trace_block_bio_bounce(blk_add_trace_bio_bounce, NULL);
unregister_trace_block_rq_complete(blk_add_trace_rq_complete, NULL);
unregister_trace_block_rq_requeue(blk_add_trace_rq_requeue, NULL);
unregister_trace_block_rq_issue(blk_add_trace_rq_issue, NULL);
unregister_trace_block_rq_insert(blk_add_trace_rq_insert, NULL);
unregister_trace_block_rq_abort(blk_add_trace_rq_abort, NULL);
tracepoint_synchronize_unregister();
}
@ -1321,7 +1336,7 @@ static enum print_line_t print_one_line(struct trace_iterator *iter,
}
static enum print_line_t blk_trace_event_print(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
return print_one_line(iter, false);
}
@ -1343,7 +1358,8 @@ static int blk_trace_synthesize_old_trace(struct trace_iterator *iter)
}
static enum print_line_t
blk_trace_event_print_binary(struct trace_iterator *iter, int flags)
blk_trace_event_print_binary(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return blk_trace_synthesize_old_trace(iter) ?
TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE;
@ -1381,12 +1397,16 @@ static struct tracer blk_tracer __read_mostly = {
.set_flag = blk_tracer_set_flag,
};
static struct trace_event trace_blk_event = {
.type = TRACE_BLK,
static struct trace_event_functions trace_blk_event_funcs = {
.trace = blk_trace_event_print,
.binary = blk_trace_event_print_binary,
};
static struct trace_event trace_blk_event = {
.type = TRACE_BLK,
.funcs = &trace_blk_event_funcs,
};
static int __init init_blk_tracer(void)
{
if (!register_ftrace_event(&trace_blk_event)) {

7
kernel/trace/ftrace.c
View File

@ -3234,7 +3234,8 @@ static int alloc_retstack_tasklist(struct ftrace_ret_stack **ret_stack_list)
}
static void
ftrace_graph_probe_sched_switch(struct task_struct *prev, struct task_struct *next)
ftrace_graph_probe_sched_switch(void *ignore,
struct task_struct *prev, struct task_struct *next)
{
unsigned long long timestamp;
int index;
@ -3288,7 +3289,7 @@ static int start_graph_tracing(void)
} while (ret == -EAGAIN);
if (!ret) {
ret = register_trace_sched_switch(ftrace_graph_probe_sched_switch);
ret = register_trace_sched_switch(ftrace_graph_probe_sched_switch, NULL);
if (ret)
pr_info("ftrace_graph: Couldn't activate tracepoint"
" probe to kernel_sched_switch\n");
@ -3364,7 +3365,7 @@ void unregister_ftrace_graph(void)
ftrace_graph_entry = ftrace_graph_entry_stub;
ftrace_shutdown(FTRACE_STOP_FUNC_RET);
unregister_pm_notifier(&ftrace_suspend_notifier);
unregister_trace_sched_switch(ftrace_graph_probe_sched_switch);
unregister_trace_sched_switch(ftrace_graph_probe_sched_switch, NULL);
out:
mutex_unlock(&ftrace_lock);

70
kernel/trace/kmemtrace.c
View File

@ -95,7 +95,8 @@ static inline void kmemtrace_free(enum kmemtrace_type_id type_id,
trace_wake_up();
}
static void kmemtrace_kmalloc(unsigned long call_site,
static void kmemtrace_kmalloc(void *ignore,
unsigned long call_site,
const void *ptr,
size_t bytes_req,
size_t bytes_alloc,
@ -105,7 +106,8 @@ static void kmemtrace_kmalloc(unsigned long call_site,
bytes_req, bytes_alloc, gfp_flags, -1);
}
static void kmemtrace_kmem_cache_alloc(unsigned long call_site,
static void kmemtrace_kmem_cache_alloc(void *ignore,
unsigned long call_site,
const void *ptr,
size_t bytes_req,
size_t bytes_alloc,
@ -115,7 +117,8 @@ static void kmemtrace_kmem_cache_alloc(unsigned long call_site,
bytes_req, bytes_alloc, gfp_flags, -1);
}
static void kmemtrace_kmalloc_node(unsigned long call_site,
static void kmemtrace_kmalloc_node(void *ignore,
unsigned long call_site,
const void *ptr,
size_t bytes_req,
size_t bytes_alloc,
@ -126,7 +129,8 @@ static void kmemtrace_kmalloc_node(unsigned long call_site,
bytes_req, bytes_alloc, gfp_flags, node);
}
static void kmemtrace_kmem_cache_alloc_node(unsigned long call_site,
static void kmemtrace_kmem_cache_alloc_node(void *ignore,
unsigned long call_site,
const void *ptr,
size_t bytes_req,
size_t bytes_alloc,
@ -137,12 +141,14 @@ static void kmemtrace_kmem_cache_alloc_node(unsigned long call_site,
bytes_req, bytes_alloc, gfp_flags, node);
}
static void kmemtrace_kfree(unsigned long call_site, const void *ptr)
static void
kmemtrace_kfree(void *ignore, unsigned long call_site, const void *ptr)
{
kmemtrace_free(KMEMTRACE_TYPE_KMALLOC, call_site, ptr);
}
static void kmemtrace_kmem_cache_free(unsigned long call_site, const void *ptr)
static void kmemtrace_kmem_cache_free(void *ignore,
unsigned long call_site, const void *ptr)
{
kmemtrace_free(KMEMTRACE_TYPE_CACHE, call_site, ptr);
}
@ -151,34 +157,34 @@ static int kmemtrace_start_probes(void)
{
int err;
err = register_trace_kmalloc(kmemtrace_kmalloc);
err = register_trace_kmalloc(kmemtrace_kmalloc, NULL);
if (err)
return err;
err = register_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc);
err = register_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc, NULL);
if (err)
return err;
err = register_trace_kmalloc_node(kmemtrace_kmalloc_node);
err = register_trace_kmalloc_node(kmemtrace_kmalloc_node, NULL);
if (err)
return err;
err = register_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node);
err = register_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node, NULL);
if (err)
return err;
err = register_trace_kfree(kmemtrace_kfree);
err = register_trace_kfree(kmemtrace_kfree, NULL);
if (err)
return err;
err = register_trace_kmem_cache_free(kmemtrace_kmem_cache_free);
err = register_trace_kmem_cache_free(kmemtrace_kmem_cache_free, NULL);
return err;
}
static void kmemtrace_stop_probes(void)
{
unregister_trace_kmalloc(kmemtrace_kmalloc);
unregister_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc);
unregister_trace_kmalloc_node(kmemtrace_kmalloc_node);
unregister_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node);
unregister_trace_kfree(kmemtrace_kfree);
unregister_trace_kmem_cache_free(kmemtrace_kmem_cache_free);
unregister_trace_kmalloc(kmemtrace_kmalloc, NULL);
unregister_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc, NULL);
unregister_trace_kmalloc_node(kmemtrace_kmalloc_node, NULL);
unregister_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node, NULL);
unregister_trace_kfree(kmemtrace_kfree, NULL);
unregister_trace_kmem_cache_free(kmemtrace_kmem_cache_free, NULL);
}
static int kmem_trace_init(struct trace_array *tr)
@ -237,7 +243,8 @@ struct kmemtrace_user_event_alloc {
};
static enum print_line_t
kmemtrace_print_alloc(struct trace_iterator *iter, int flags)
kmemtrace_print_alloc(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct trace_seq *s = &iter->seq;
struct kmemtrace_alloc_entry *entry;
@ -257,7 +264,8 @@ kmemtrace_print_alloc(struct trace_iterator *iter, int flags)
}
static enum print_line_t
kmemtrace_print_free(struct trace_iterator *iter, int flags)
kmemtrace_print_free(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct trace_seq *s = &iter->seq;
struct kmemtrace_free_entry *entry;
@ -275,7 +283,8 @@ kmemtrace_print_free(struct trace_iterator *iter, int flags)
}
static enum print_line_t
kmemtrace_print_alloc_user(struct trace_iterator *iter, int flags)
kmemtrace_print_alloc_user(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct trace_seq *s = &iter->seq;
struct kmemtrace_alloc_entry *entry;
@ -309,7 +318,8 @@ kmemtrace_print_alloc_user(struct trace_iterator *iter, int flags)
}
static enum print_line_t
kmemtrace_print_free_user(struct trace_iterator *iter, int flags)
kmemtrace_print_free_user(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct trace_seq *s = &iter->seq;
struct kmemtrace_free_entry *entry;
@ -463,18 +473,26 @@ static enum print_line_t kmemtrace_print_line(struct trace_iterator *iter)
}
}
static struct trace_event kmem_trace_alloc = {
.type = TRACE_KMEM_ALLOC,
static struct trace_event_functions kmem_trace_alloc_funcs = {
.trace = kmemtrace_print_alloc,
.binary = kmemtrace_print_alloc_user,
};
static struct trace_event kmem_trace_free = {
.type = TRACE_KMEM_FREE,
static struct trace_event kmem_trace_alloc = {
.type = TRACE_KMEM_ALLOC,
.funcs = &kmem_trace_alloc_funcs,
};
static struct trace_event_functions kmem_trace_free_funcs = {
.trace = kmemtrace_print_free,
.binary = kmemtrace_print_free_user,
};
static struct trace_event kmem_trace_free = {
.type = TRACE_KMEM_FREE,
.funcs = &kmem_trace_free_funcs,
};
static struct tracer kmem_tracer __read_mostly = {
.name = "kmemtrace",
.init = kmem_trace_init,

9
kernel/trace/trace.c
View File

@ -1936,7 +1936,7 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
}
if (event)
return event->trace(iter, sym_flags);
return event->funcs->trace(iter, sym_flags, event);
if (!trace_seq_printf(s, "Unknown type %d\n", entry->type))
goto partial;
@ -1962,7 +1962,7 @@ static enum print_line_t print_raw_fmt(struct trace_iterator *iter)
event = ftrace_find_event(entry->type);
if (event)
return event->raw(iter, 0);
return event->funcs->raw(iter, 0, event);
if (!trace_seq_printf(s, "%d ?\n", entry->type))
goto partial;
@ -1989,7 +1989,7 @@ static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
event = ftrace_find_event(entry->type);
if (event) {
enum print_line_t ret = event->hex(iter, 0);
enum print_line_t ret = event->funcs->hex(iter, 0, event);
if (ret != TRACE_TYPE_HANDLED)
return ret;
}
@ -2014,7 +2014,8 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
}
event = ftrace_find_event(entry->type);
return event ? event->binary(iter, 0) : TRACE_TYPE_HANDLED;
return event ? event->funcs->binary(iter, 0, event) :
TRACE_TYPE_HANDLED;
}
int trace_empty(struct trace_iterator *iter)

9
kernel/trace/trace.h
View File

@ -405,12 +405,12 @@ void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
int pc);
#else
static inline void ftrace_trace_stack(struct trace_array *tr,
static inline void ftrace_trace_stack(struct ring_buffer *buffer,
unsigned long flags, int skip, int pc)
{
}
static inline void ftrace_trace_userstack(struct trace_array *tr,
static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
unsigned long flags, int pc)
{
}
@ -778,12 +778,15 @@ extern void print_subsystem_event_filter(struct event_subsystem *system,
struct trace_seq *s);
extern int filter_assign_type(const char *type);
struct list_head *
trace_get_fields(struct ftrace_event_call *event_call);
static inline int
filter_check_discard(struct ftrace_event_call *call, void *rec,
struct ring_buffer *buffer,
struct ring_buffer_event *event)
{
if (unlikely(call->filter_active) &&
if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
!filter_match_preds(call->filter, rec)) {
ring_buffer_discard_commit(buffer, event);
return 1;

8
kernel/trace/trace_branch.c
View File

@ -143,7 +143,7 @@ static void branch_trace_reset(struct trace_array *tr)
}
static enum print_line_t trace_branch_print(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct trace_branch *field;
@ -167,9 +167,13 @@ static void branch_print_header(struct seq_file *s)
" |\n");
}
static struct trace_event_functions trace_branch_funcs = {
.trace = trace_branch_print,
};
static struct trace_event trace_branch_event = {
.type = TRACE_BRANCH,
.trace = trace_branch_print,
.funcs = &trace_branch_funcs,
};
static struct tracer branch_trace __read_mostly =

18
kernel/trace/trace_event_perf.c
View File

@ -56,7 +56,13 @@ static int perf_trace_event_init(struct ftrace_event_call *tp_event,
}
}
ret = tp_event->perf_event_enable(tp_event);
if (tp_event->class->reg)
ret = tp_event->class->reg(tp_event, TRACE_REG_PERF_REGISTER);
else
ret = tracepoint_probe_register(tp_event->name,
tp_event->class->perf_probe,
tp_event);
if (ret)
goto fail;
@ -89,7 +95,8 @@ int perf_trace_init(struct perf_event *p_event)
mutex_lock(&event_mutex);
list_for_each_entry(tp_event, &ftrace_events, list) {
if (tp_event->id == event_id && tp_event->perf_event_enable &&
if (tp_event->event.type == event_id &&
tp_event->class && tp_event->class->perf_probe &&
try_module_get(tp_event->mod)) {
ret = perf_trace_event_init(tp_event, p_event);
break;
@ -128,7 +135,12 @@ void perf_trace_destroy(struct perf_event *p_event)
if (--tp_event->perf_refcount > 0)
return;
tp_event->perf_event_disable(tp_event);
if (tp_event->class->reg)
tp_event->class->reg(tp_event, TRACE_REG_PERF_UNREGISTER);
else
tracepoint_probe_unregister(tp_event->name,
tp_event->class->perf_probe,
tp_event);
free_percpu(tp_event->perf_events);
tp_event->perf_events = NULL;

139
kernel/trace/trace_events.c
View File

@ -29,11 +29,23 @@ DEFINE_MUTEX(event_mutex);
LIST_HEAD(ftrace_events);
struct list_head *
trace_get_fields(struct ftrace_event_call *event_call)
{
if (!event_call->class->get_fields)
return &event_call->class->fields;
return event_call->class->get_fields(event_call);
}
int trace_define_field(struct ftrace_event_call *call, const char *type,
const char *name, int offset, int size, int is_signed,
int filter_type)
{
struct ftrace_event_field *field;
struct list_head *head;
if (WARN_ON(!call->class))
return 0;
field = kzalloc(sizeof(*field), GFP_KERNEL);
if (!field)
@ -56,7 +68,8 @@ int trace_define_field(struct ftrace_event_call *call, const char *type,
field->size = size;
field->is_signed = is_signed;
list_add(&field->link, &call->fields);
head = trace_get_fields(call);
list_add(&field->link, head);
return 0;
@ -94,8 +107,10 @@ static int trace_define_common_fields(struct ftrace_event_call *call)
void trace_destroy_fields(struct ftrace_event_call *call)
{
struct ftrace_event_field *field, *next;
struct list_head *head;
list_for_each_entry_safe(field, next, &call->fields, link) {
head = trace_get_fields(call);
list_for_each_entry_safe(field, next, head, link) {
list_del(&field->link);
kfree(field->type);
kfree(field->name);
@ -107,11 +122,9 @@ int trace_event_raw_init(struct ftrace_event_call *call)
{
int id;
id = register_ftrace_event(call->event);
id = register_ftrace_event(&call->event);
if (!id)
return -ENODEV;
call->id = id;
INIT_LIST_HEAD(&call->fields);
return 0;
}
@ -124,23 +137,33 @@ static int ftrace_event_enable_disable(struct ftrace_event_call *call,
switch (enable) {
case 0:
if (call->enabled) {
call->enabled = 0;
if (call->flags & TRACE_EVENT_FL_ENABLED) {
call->flags &= ~TRACE_EVENT_FL_ENABLED;
tracing_stop_cmdline_record();
call->unregfunc(call);
if (call->class->reg)
call->class->reg(call, TRACE_REG_UNREGISTER);
else
tracepoint_probe_unregister(call->name,
call->class->probe,
call);
}
break;
case 1:
if (!call->enabled) {
if (!(call->flags & TRACE_EVENT_FL_ENABLED)) {
tracing_start_cmdline_record();
ret = call->regfunc(call);
if (call->class->reg)
ret = call->class->reg(call, TRACE_REG_REGISTER);
else
ret = tracepoint_probe_register(call->name,
call->class->probe,
call);
if (ret) {
tracing_stop_cmdline_record();
pr_info("event trace: Could not enable event "
"%s\n", call->name);
break;
}
call->enabled = 1;
call->flags |= TRACE_EVENT_FL_ENABLED;
}
break;
}
@ -171,15 +194,16 @@ static int __ftrace_set_clr_event(const char *match, const char *sub,
mutex_lock(&event_mutex);
list_for_each_entry(call, &ftrace_events, list) {
if (!call->name || !call->regfunc)
if (!call->name || !call->class ||
(!call->class->probe && !call->class->reg))
continue;
if (match &&
strcmp(match, call->name) != 0 &&
strcmp(match, call->system) != 0)
strcmp(match, call->class->system) != 0)
continue;
if (sub && strcmp(sub, call->system) != 0)
if (sub && strcmp(sub, call->class->system) != 0)
continue;
if (event && strcmp(event, call->name) != 0)
@ -297,7 +321,7 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
* The ftrace subsystem is for showing formats only.
* They can not be enabled or disabled via the event files.
*/
if (call->regfunc)
if (call->class && (call->class->probe || call->class->reg))
return call;
}
@ -328,7 +352,7 @@ s_next(struct seq_file *m, void *v, loff_t *pos)
(*pos)++;
list_for_each_entry_continue(call, &ftrace_events, list) {
if (call->enabled)
if (call->flags & TRACE_EVENT_FL_ENABLED)
return call;
}
@ -355,8 +379,8 @@ static int t_show(struct seq_file *m, void *v)
{
struct ftrace_event_call *call = v;
if (strcmp(call->system, TRACE_SYSTEM) != 0)
seq_printf(m, "%s:", call->system);
if (strcmp(call->class->system, TRACE_SYSTEM) != 0)
seq_printf(m, "%s:", call->class->system);
seq_printf(m, "%s\n", call->name);
return 0;
@ -387,7 +411,7 @@ event_enable_read(struct file *filp, char __user *ubuf, size_t cnt,
struct ftrace_event_call *call = filp->private_data;
char *buf;
if (call->enabled)
if (call->flags & TRACE_EVENT_FL_ENABLED)
buf = "1\n";
else
buf = "0\n";
@ -450,10 +474,11 @@ system_enable_read(struct file *filp, char __user *ubuf, size_t cnt,
mutex_lock(&event_mutex);
list_for_each_entry(call, &ftrace_events, list) {
if (!call->name || !call->regfunc)
if (!call->name || !call->class ||
(!call->class->probe && !call->class->reg))
continue;
if (system && strcmp(call->system, system) != 0)
if (system && strcmp(call->class->system, system) != 0)
continue;
/*
@ -461,7 +486,7 @@ system_enable_read(struct file *filp, char __user *ubuf, size_t cnt,
* or if all events or cleared, or if we have
* a mixture.
*/
set |= (1 << !!call->enabled);
set |= (1 << !!(call->flags & TRACE_EVENT_FL_ENABLED));
/*
* If we have a mixture, no need to look further.
@ -525,6 +550,7 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
{
struct ftrace_event_call *call = filp->private_data;
struct ftrace_event_field *field;
struct list_head *head;
struct trace_seq *s;
int common_field_count = 5;
char *buf;
@ -540,10 +566,11 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
trace_seq_init(s);
trace_seq_printf(s, "name: %s\n", call->name);
trace_seq_printf(s, "ID: %d\n", call->id);
trace_seq_printf(s, "ID: %d\n", call->event.type);
trace_seq_printf(s, "format:\n");
list_for_each_entry_reverse(field, &call->fields, link) {
head = trace_get_fields(call);
list_for_each_entry_reverse(field, head, link) {
/*
* Smartly shows the array type(except dynamic array).
* Normal:
@ -613,7 +640,7 @@ event_id_read(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos)
return -ENOMEM;
trace_seq_init(s);
trace_seq_printf(s, "%d\n", call->id);
trace_seq_printf(s, "%d\n", call->event.type);
r = simple_read_from_buffer(ubuf, cnt, ppos,
s->buffer, s->len);
@ -919,14 +946,15 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
const struct file_operations *filter,
const struct file_operations *format)
{
struct list_head *head;
int ret;
/*
* If the trace point header did not define TRACE_SYSTEM
* then the system would be called "TRACE_SYSTEM".
*/
if (strcmp(call->system, TRACE_SYSTEM) != 0)
d_events = event_subsystem_dir(call->system, d_events);
if (strcmp(call->class->system, TRACE_SYSTEM) != 0)
d_events = event_subsystem_dir(call->class->system, d_events);
call->dir = debugfs_create_dir(call->name, d_events);
if (!call->dir) {
@ -935,22 +963,31 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
return -1;
}
if (call->regfunc)
if (call->class->probe || call->class->reg)
trace_create_file("enable", 0644, call->dir, call,
enable);
if (call->id && call->perf_event_enable)
#ifdef CONFIG_PERF_EVENTS
if (call->event.type && (call->class->perf_probe || call->class->reg))
trace_create_file("id", 0444, call->dir, call,
id);
#endif
if (call->define_fields) {
ret = trace_define_common_fields(call);
if (!ret)
ret = call->define_fields(call);
if (ret < 0) {
pr_warning("Could not initialize trace point"
" events/%s\n", call->name);
return ret;
if (call->class->define_fields) {
/*
* Other events may have the same class. Only update
* the fields if they are not already defined.
*/
head = trace_get_fields(call);
if (list_empty(head)) {
ret = trace_define_common_fields(call);
if (!ret)
ret = call->class->define_fields(call);
if (ret < 0) {
pr_warning("Could not initialize trace point"
" events/%s\n", call->name);
return ret;
}
}
trace_create_file("filter", 0644, call->dir, call,
filter);
@ -970,8 +1007,8 @@ static int __trace_add_event_call(struct ftrace_event_call *call)
if (!call->name)
return -EINVAL;
if (call->raw_init) {
ret = call->raw_init(call);
if (call->class->raw_init) {
ret = call->class->raw_init(call);
if (ret < 0) {
if (ret != -ENOSYS)
pr_warning("Could not initialize trace "
@ -1035,13 +1072,13 @@ static void remove_subsystem_dir(const char *name)
static void __trace_remove_event_call(struct ftrace_event_call *call)
{
ftrace_event_enable_disable(call, 0);
if (call->event)
__unregister_ftrace_event(call->event);
if (call->event.funcs)
__unregister_ftrace_event(&call->event);
debugfs_remove_recursive(call->dir);
list_del(&call->list);
trace_destroy_fields(call);
destroy_preds(call);
remove_subsystem_dir(call->system);
remove_subsystem_dir(call->class->system);
}
/* Remove an event_call */
@ -1132,8 +1169,8 @@ static void trace_module_add_events(struct module *mod)
/* The linker may leave blanks */
if (!call->name)
continue;
if (call->raw_init) {
ret = call->raw_init(call);
if (call->class->raw_init) {
ret = call->class->raw_init(call);
if (ret < 0) {
if (ret != -ENOSYS)
pr_warning("Could not initialize trace "
@ -1286,8 +1323,8 @@ static __init int event_trace_init(void)
/* The linker may leave blanks */
if (!call->name)
continue;
if (call->raw_init) {
ret = call->raw_init(call);
if (call->class->raw_init) {
ret = call->class->raw_init(call);
if (ret < 0) {
if (ret != -ENOSYS)
pr_warning("Could not initialize trace "
@ -1388,8 +1425,8 @@ static __init void event_trace_self_tests(void)
list_for_each_entry(call, &ftrace_events, list) {
/* Only test those that have a regfunc */
if (!call->regfunc)
/* Only test those that have a probe */
if (!call->class || !call->class->probe)
continue;
/*
@ -1399,8 +1436,8 @@ static __init void event_trace_self_tests(void)
* syscalls as we test.
*/
#ifndef CONFIG_EVENT_TRACE_TEST_SYSCALLS
if (call->system &&
strcmp(call->system, "syscalls") == 0)
if (call->class->system &&
strcmp(call->class->system, "syscalls") == 0)
continue;
#endif
@ -1410,7 +1447,7 @@ static __init void event_trace_self_tests(void)
* If an event is already enabled, someone is using
* it and the self test should not be on.
*/
if (call->enabled) {
if (call->flags & TRACE_EVENT_FL_ENABLED) {
pr_warning("Enabled event during self test!\n");
WARN_ON_ONCE(1);
continue;

28
kernel/trace/trace_events_filter.c
View File

@ -500,8 +500,10 @@ static struct ftrace_event_field *
find_event_field(struct ftrace_event_call *call, char *name)
{
struct ftrace_event_field *field;
struct list_head *head;
list_for_each_entry(field, &call->fields, link) {
head = trace_get_fields(call);
list_for_each_entry(field, head, link) {
if (!strcmp(field->name, name))
return field;
}
@ -545,7 +547,7 @@ static void filter_disable_preds(struct ftrace_event_call *call)
struct event_filter *filter = call->filter;
int i;
call->filter_active = 0;
call->flags &= ~TRACE_EVENT_FL_FILTERED;
filter->n_preds = 0;
for (i = 0; i < MAX_FILTER_PRED; i++)
@ -572,7 +574,7 @@ void destroy_preds(struct ftrace_event_call *call)
{
__free_preds(call->filter);
call->filter = NULL;
call->filter_active = 0;
call->flags &= ~TRACE_EVENT_FL_FILTERED;
}
static struct event_filter *__alloc_preds(void)
@ -611,7 +613,7 @@ static int init_preds(struct ftrace_event_call *call)
if (call->filter)
return 0;
call->filter_active = 0;
call->flags &= ~TRACE_EVENT_FL_FILTERED;
call->filter = __alloc_preds();
if (IS_ERR(call->filter))
return PTR_ERR(call->filter);
@ -625,10 +627,10 @@ static int init_subsystem_preds(struct event_subsystem *system)
int err;
list_for_each_entry(call, &ftrace_events, list) {
if (!call->define_fields)
if (!call->class || !call->class->define_fields)
continue;
if (strcmp(call->system, system->name) != 0)
if (strcmp(call->class->system, system->name) != 0)
continue;
err = init_preds(call);
@ -644,10 +646,10 @@ static void filter_free_subsystem_preds(struct event_subsystem *system)
struct ftrace_event_call *call;
list_for_each_entry(call, &ftrace_events, list) {
if (!call->define_fields)
if (!call->class || !call->class->define_fields)
continue;
if (strcmp(call->system, system->name) != 0)
if (strcmp(call->class->system, system->name) != 0)
continue;
filter_disable_preds(call);
@ -1249,10 +1251,10 @@ static int replace_system_preds(struct event_subsystem *system,
list_for_each_entry(call, &ftrace_events, list) {
struct event_filter *filter = call->filter;
if (!call->define_fields)
if (!call->class || !call->class->define_fields)
continue;
if (strcmp(call->system, system->name) != 0)
if (strcmp(call->class->system, system->name) != 0)
continue;
/* try to see if the filter can be applied */
@ -1266,7 +1268,7 @@ static int replace_system_preds(struct event_subsystem *system,
if (err)
filter_disable_preds(call);
else {
call->filter_active = 1;
call->flags |= TRACE_EVENT_FL_FILTERED;
replace_filter_string(filter, filter_string);
}
fail = false;
@ -1315,7 +1317,7 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
if (err)
append_filter_err(ps, call->filter);
else
call->filter_active = 1;
call->flags |= TRACE_EVENT_FL_FILTERED;
out:
filter_opstack_clear(ps);
postfix_clear(ps);
@ -1393,7 +1395,7 @@ int ftrace_profile_set_filter(struct perf_event *event, int event_id,
mutex_lock(&event_mutex);
list_for_each_entry(call, &ftrace_events, list) {
if (call->id == event_id)
if (call->event.type == event_id)
break;
}

16
kernel/trace/trace_export.c
View File

@ -127,7 +127,7 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
static int ftrace_raw_init_event(struct ftrace_event_call *call)
{
INIT_LIST_HEAD(&call->fields);
INIT_LIST_HEAD(&call->class->fields);
return 0;
}
@ -153,17 +153,21 @@ static int ftrace_raw_init_event(struct ftrace_event_call *call)
#define F_printk(fmt, args...) #fmt ", " __stringify(args)
#undef FTRACE_ENTRY
#define FTRACE_ENTRY(call, struct_name, type, tstruct, print) \
#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \
\
struct ftrace_event_class event_class_ftrace_##call = { \
.system = __stringify(TRACE_SYSTEM), \
.define_fields = ftrace_define_fields_##call, \
.raw_init = ftrace_raw_init_event, \
}; \
\
struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.id = type, \
.system = __stringify(TRACE_SYSTEM), \
.raw_init = ftrace_raw_init_event, \
.event.type = etype, \
.class = &event_class_ftrace_##call, \
.print_fmt = print, \
.define_fields = ftrace_define_fields_##call, \
}; \
#include "trace_entries.h"

13
kernel/trace/trace_functions_graph.c
View File

@ -1025,7 +1025,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
if (!event)
return TRACE_TYPE_UNHANDLED;
ret = event->trace(iter, sym_flags);
ret = event->funcs->trace(iter, sym_flags, event);
if (ret != TRACE_TYPE_HANDLED)
return ret;
}
@ -1112,7 +1112,8 @@ print_graph_function(struct trace_iterator *iter)
}
static enum print_line_t
print_graph_function_event(struct trace_iterator *iter, int flags)
print_graph_function_event(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return print_graph_function(iter);
}
@ -1225,14 +1226,18 @@ void graph_trace_close(struct trace_iterator *iter)
}
}
static struct trace_event_functions graph_functions = {
.trace = print_graph_function_event,
};
static struct trace_event graph_trace_entry_event = {
.type = TRACE_GRAPH_ENT,
.trace = print_graph_function_event,
.funcs = &graph_functions,
};
static struct trace_event graph_trace_ret_event = {
.type = TRACE_GRAPH_RET,
.trace = print_graph_function_event,
.funcs = &graph_functions
};
static struct tracer graph_trace __read_mostly = {

102
kernel/trace/trace_kprobe.c
View File

@ -324,8 +324,8 @@ struct trace_probe {
unsigned long nhit;
unsigned int flags; /* For TP_FLAG_* */
const char *symbol; /* symbol name */
struct ftrace_event_class class;
struct ftrace_event_call call;
struct trace_event event;
ssize_t size; /* trace entry size */
unsigned int nr_args;
struct probe_arg args[];
@ -404,6 +404,7 @@ static struct trace_probe *alloc_trace_probe(const char *group,
goto error;
}
tp->call.class = &tp->class;
tp->call.name = kstrdup(event, GFP_KERNEL);
if (!tp->call.name)
goto error;
@ -413,8 +414,8 @@ static struct trace_probe *alloc_trace_probe(const char *group,
goto error;
}
tp->call.system = kstrdup(group, GFP_KERNEL);
if (!tp->call.system)
tp->class.system = kstrdup(group, GFP_KERNEL);
if (!tp->class.system)
goto error;
INIT_LIST_HEAD(&tp->list);
@ -443,7 +444,7 @@ static void free_trace_probe(struct trace_probe *tp)
for (i = 0; i < tp->nr_args; i++)
free_probe_arg(&tp->args[i]);
kfree(tp->call.system);
kfree(tp->call.class->system);
kfree(tp->call.name);
kfree(tp->symbol);
kfree(tp);
@ -456,7 +457,7 @@ static struct trace_probe *find_probe_event(const char *event,
list_for_each_entry(tp, &probe_list, list)
if (strcmp(tp->call.name, event) == 0 &&
strcmp(tp->call.system, group) == 0)
strcmp(tp->call.class->system, group) == 0)
return tp;
return NULL;
}
@ -481,7 +482,7 @@ static int register_trace_probe(struct trace_probe *tp)
mutex_lock(&probe_lock);
/* register as an event */
old_tp = find_probe_event(tp->call.name, tp->call.system);
old_tp = find_probe_event(tp->call.name, tp->call.class->system);
if (old_tp) {
/* delete old event */
unregister_trace_probe(old_tp);
@ -904,7 +905,7 @@ static int probes_seq_show(struct seq_file *m, void *v)
int i;
seq_printf(m, "%c", probe_is_return(tp) ? 'r' : 'p');
seq_printf(m, ":%s/%s", tp->call.system, tp->call.name);
seq_printf(m, ":%s/%s", tp->call.class->system, tp->call.name);
if (!tp->symbol)
seq_printf(m, " 0x%p", tp->rp.kp.addr);
@ -1061,8 +1062,8 @@ static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
size = sizeof(*entry) + tp->size;
event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
irq_flags, pc);
event = trace_current_buffer_lock_reserve(&buffer, call->event.type,
size, irq_flags, pc);
if (!event)
return;
@ -1094,8 +1095,8 @@ static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
size = sizeof(*entry) + tp->size;
event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
irq_flags, pc);
event = trace_current_buffer_lock_reserve(&buffer, call->event.type,
size, irq_flags, pc);
if (!event)
return;
@ -1112,18 +1113,17 @@ static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
/* Event entry printers */
enum print_line_t
print_kprobe_event(struct trace_iterator *iter, int flags)
print_kprobe_event(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct kprobe_trace_entry_head *field;
struct trace_seq *s = &iter->seq;
struct trace_event *event;
struct trace_probe *tp;
u8 *data;
int i;
field = (struct kprobe_trace_entry_head *)iter->ent;
event = ftrace_find_event(field->ent.type);
tp = container_of(event, struct trace_probe, event);
tp = container_of(event, struct trace_probe, call.event);
if (!trace_seq_printf(s, "%s: (", tp->call.name))
goto partial;
@ -1149,18 +1149,17 @@ print_kprobe_event(struct trace_iterator *iter, int flags)
}
enum print_line_t
print_kretprobe_event(struct trace_iterator *iter, int flags)
print_kretprobe_event(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct kretprobe_trace_entry_head *field;
struct trace_seq *s = &iter->seq;
struct trace_event *event;
struct trace_probe *tp;
u8 *data;
int i;
field = (struct kretprobe_trace_entry_head *)iter->ent;
event = ftrace_find_event(field->ent.type);
tp = container_of(event, struct trace_probe, event);
tp = container_of(event, struct trace_probe, call.event);
if (!trace_seq_printf(s, "%s: (", tp->call.name))
goto partial;
@ -1217,8 +1216,6 @@ static void probe_event_disable(struct ftrace_event_call *call)
static int probe_event_raw_init(struct ftrace_event_call *event_call)
{
INIT_LIST_HEAD(&event_call->fields);
return 0;
}
@ -1353,7 +1350,7 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp,
"profile buffer not large enough"))
return;
entry = perf_trace_buf_prepare(size, call->id, regs, &rctx);
entry = perf_trace_buf_prepare(size, call->event.type, regs, &rctx);
if (!entry)
return;
@ -1385,7 +1382,7 @@ static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri,
"profile buffer not large enough"))
return;
entry = perf_trace_buf_prepare(size, call->id, regs, &rctx);
entry = perf_trace_buf_prepare(size, call->event.type, regs, &rctx);
if (!entry)
return;
@ -1426,6 +1423,26 @@ static void probe_perf_disable(struct ftrace_event_call *call)
}
#endif /* CONFIG_PERF_EVENTS */
static __kprobes
int kprobe_register(struct ftrace_event_call *event, enum trace_reg type)
{
switch (type) {
case TRACE_REG_REGISTER:
return probe_event_enable(event);
case TRACE_REG_UNREGISTER:
probe_event_disable(event);
return 0;
#ifdef CONFIG_PERF_EVENTS
case TRACE_REG_PERF_REGISTER:
return probe_perf_enable(event);
case TRACE_REG_PERF_UNREGISTER:
probe_perf_disable(event);
return 0;
#endif
}
return 0;
}
static __kprobes
int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs)
@ -1455,6 +1472,14 @@ int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs)
return 0; /* We don't tweek kernel, so just return 0 */
}
static struct trace_event_functions kretprobe_funcs = {
.trace = print_kretprobe_event
};
static struct trace_event_functions kprobe_funcs = {
.trace = print_kprobe_event
};
static int register_probe_event(struct trace_probe *tp)
{
struct ftrace_event_call *call = &tp->call;
@ -1462,36 +1487,31 @@ static int register_probe_event(struct trace_probe *tp)
/* Initialize ftrace_event_call */
if (probe_is_return(tp)) {
tp->event.trace = print_kretprobe_event;
call->raw_init = probe_event_raw_init;
call->define_fields = kretprobe_event_define_fields;
INIT_LIST_HEAD(&call->class->fields);
call->event.funcs = &kretprobe_funcs;
call->class->raw_init = probe_event_raw_init;
call->class->define_fields = kretprobe_event_define_fields;
} else {
tp->event.trace = print_kprobe_event;
call->raw_init = probe_event_raw_init;
call->define_fields = kprobe_event_define_fields;
INIT_LIST_HEAD(&call->class->fields);
call->event.funcs = &kprobe_funcs;
call->class->raw_init = probe_event_raw_init;
call->class->define_fields = kprobe_event_define_fields;
}
if (set_print_fmt(tp) < 0)
return -ENOMEM;
call->event = &tp->event;
call->id = register_ftrace_event(&tp->event);
if (!call->id) {
ret = register_ftrace_event(&call->event);
if (!ret) {
kfree(call->print_fmt);
return -ENODEV;
}
call->enabled = 0;
call->regfunc = probe_event_enable;
call->unregfunc = probe_event_disable;
#ifdef CONFIG_PERF_EVENTS
call->perf_event_enable = probe_perf_enable;
call->perf_event_disable = probe_perf_disable;
#endif
call->flags = 0;
call->class->reg = kprobe_register;
call->data = tp;
ret = trace_add_event_call(call);
if (ret) {
pr_info("Failed to register kprobe event: %s\n", call->name);
kfree(call->print_fmt);
unregister_ftrace_event(&tp->event);
unregister_ftrace_event(&call->event);
}
return ret;
}

139
kernel/trace/trace_output.c
View File

@ -726,6 +726,9 @@ int register_ftrace_event(struct trace_event *event)
if (WARN_ON(!event))
goto out;
if (WARN_ON(!event->funcs))
goto out;
INIT_LIST_HEAD(&event->list);
if (!event->type) {
@ -758,14 +761,14 @@ int register_ftrace_event(struct trace_event *event)
goto out;
}
if (event->trace == NULL)
event->trace = trace_nop_print;
if (event->raw == NULL)
event->raw = trace_nop_print;
if (event->hex == NULL)
event->hex = trace_nop_print;
if (event->binary == NULL)
event->binary = trace_nop_print;
if (event->funcs->trace == NULL)
event->funcs->trace = trace_nop_print;
if (event->funcs->raw == NULL)
event->funcs->raw = trace_nop_print;
if (event->funcs->hex == NULL)
event->funcs->hex = trace_nop_print;
if (event->funcs->binary == NULL)
event->funcs->binary = trace_nop_print;
key = event->type & (EVENT_HASHSIZE - 1);
@ -807,13 +810,15 @@ EXPORT_SYMBOL_GPL(unregister_ftrace_event);
* Standard events
*/
enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags)
enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return TRACE_TYPE_HANDLED;
}
/* TRACE_FN */
static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags)
static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct ftrace_entry *field;
struct trace_seq *s = &iter->seq;
@ -840,7 +845,8 @@ static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags)
return TRACE_TYPE_PARTIAL_LINE;
}
static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags)
static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct ftrace_entry *field;
@ -854,7 +860,8 @@ static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}
static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags)
static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct ftrace_entry *field;
struct trace_seq *s = &iter->seq;
@ -867,7 +874,8 @@ static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}
static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags)
static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct ftrace_entry *field;
struct trace_seq *s = &iter->seq;
@ -880,14 +888,18 @@ static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}
static struct trace_event trace_fn_event = {
.type = TRACE_FN,
static struct trace_event_functions trace_fn_funcs = {
.trace = trace_fn_trace,
.raw = trace_fn_raw,
.hex = trace_fn_hex,
.binary = trace_fn_bin,
};
static struct trace_event trace_fn_event = {
.type = TRACE_FN,
.funcs = &trace_fn_funcs,
};
/* TRACE_CTX an TRACE_WAKE */
static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
char *delim)
@ -916,13 +928,14 @@ static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
return TRACE_TYPE_HANDLED;
}
static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags)
static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return trace_ctxwake_print(iter, "==>");
}
static enum print_line_t trace_wake_print(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
return trace_ctxwake_print(iter, " +");
}
@ -950,12 +963,14 @@ static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
return TRACE_TYPE_HANDLED;
}
static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags)
static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return trace_ctxwake_raw(iter, 0);
}
static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags)
static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return trace_ctxwake_raw(iter, '+');
}
@ -984,18 +999,20 @@ static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
return TRACE_TYPE_HANDLED;
}
static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags)
static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return trace_ctxwake_hex(iter, 0);
}
static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags)
static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
return trace_ctxwake_hex(iter, '+');
}
static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct ctx_switch_entry *field;
struct trace_seq *s = &iter->seq;
@ -1012,25 +1029,33 @@ static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
return TRACE_TYPE_HANDLED;
}
static struct trace_event trace_ctx_event = {
.type = TRACE_CTX,
static struct trace_event_functions trace_ctx_funcs = {
.trace = trace_ctx_print,
.raw = trace_ctx_raw,
.hex = trace_ctx_hex,
.binary = trace_ctxwake_bin,
};
static struct trace_event trace_wake_event = {
.type = TRACE_WAKE,
static struct trace_event trace_ctx_event = {
.type = TRACE_CTX,
.funcs = &trace_ctx_funcs,
};
static struct trace_event_functions trace_wake_funcs = {
.trace = trace_wake_print,
.raw = trace_wake_raw,
.hex = trace_wake_hex,
.binary = trace_ctxwake_bin,
};
static struct trace_event trace_wake_event = {
.type = TRACE_WAKE,
.funcs = &trace_wake_funcs,
};
/* TRACE_SPECIAL */
static enum print_line_t trace_special_print(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct special_entry *field;
@ -1046,7 +1071,7 @@ static enum print_line_t trace_special_print(struct trace_iterator *iter,
}
static enum print_line_t trace_special_hex(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct special_entry *field;
struct trace_seq *s = &iter->seq;
@ -1061,7 +1086,7 @@ static enum print_line_t trace_special_hex(struct trace_iterator *iter,
}
static enum print_line_t trace_special_bin(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct special_entry *field;
struct trace_seq *s = &iter->seq;
@ -1075,18 +1100,22 @@ static enum print_line_t trace_special_bin(struct trace_iterator *iter,
return TRACE_TYPE_HANDLED;
}
static struct trace_event trace_special_event = {
.type = TRACE_SPECIAL,
static struct trace_event_functions trace_special_funcs = {
.trace = trace_special_print,
.raw = trace_special_print,
.hex = trace_special_hex,
.binary = trace_special_bin,
};
static struct trace_event trace_special_event = {
.type = TRACE_SPECIAL,
.funcs = &trace_special_funcs,
};
/* TRACE_STACK */
static enum print_line_t trace_stack_print(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct stack_entry *field;
struct trace_seq *s = &iter->seq;
@ -1114,17 +1143,21 @@ static enum print_line_t trace_stack_print(struct trace_iterator *iter,
return TRACE_TYPE_PARTIAL_LINE;
}
static struct trace_event trace_stack_event = {
.type = TRACE_STACK,
static struct trace_event_functions trace_stack_funcs = {
.trace = trace_stack_print,
.raw = trace_special_print,
.hex = trace_special_hex,
.binary = trace_special_bin,
};
static struct trace_event trace_stack_event = {
.type = TRACE_STACK,
.funcs = &trace_stack_funcs,
};
/* TRACE_USER_STACK */
static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct userstack_entry *field;
struct trace_seq *s = &iter->seq;
@ -1143,17 +1176,22 @@ static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
return TRACE_TYPE_PARTIAL_LINE;
}
static struct trace_event trace_user_stack_event = {
.type = TRACE_USER_STACK,
static struct trace_event_functions trace_user_stack_funcs = {
.trace = trace_user_stack_print,
.raw = trace_special_print,
.hex = trace_special_hex,
.binary = trace_special_bin,
};
static struct trace_event trace_user_stack_event = {
.type = TRACE_USER_STACK,
.funcs = &trace_user_stack_funcs,
};
/* TRACE_BPRINT */
static enum print_line_t
trace_bprint_print(struct trace_iterator *iter, int flags)
trace_bprint_print(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct trace_entry *entry = iter->ent;
struct trace_seq *s = &iter->seq;
@ -1178,7 +1216,8 @@ trace_bprint_print(struct trace_iterator *iter, int flags)
static enum print_line_t
trace_bprint_raw(struct trace_iterator *iter, int flags)
trace_bprint_raw(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct bprint_entry *field;
struct trace_seq *s = &iter->seq;
@ -1197,16 +1236,19 @@ trace_bprint_raw(struct trace_iterator *iter, int flags)
return TRACE_TYPE_PARTIAL_LINE;
}
static struct trace_event trace_bprint_event = {
.type = TRACE_BPRINT,
static struct trace_event_functions trace_bprint_funcs = {
.trace = trace_bprint_print,
.raw = trace_bprint_raw,
};
static struct trace_event trace_bprint_event = {
.type = TRACE_BPRINT,
.funcs = &trace_bprint_funcs,
};
/* TRACE_PRINT */
static enum print_line_t trace_print_print(struct trace_iterator *iter,
int flags)
int flags, struct trace_event *event)
{
struct print_entry *field;
struct trace_seq *s = &iter->seq;
@ -1225,7 +1267,8 @@ static enum print_line_t trace_print_print(struct trace_iterator *iter,
return TRACE_TYPE_PARTIAL_LINE;
}
static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags)
static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct print_entry *field;
@ -1240,12 +1283,16 @@ static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags)
return TRACE_TYPE_PARTIAL_LINE;
}
static struct trace_event trace_print_event = {
.type = TRACE_PRINT,
static struct trace_event_functions trace_print_funcs = {
.trace = trace_print_print,
.raw = trace_print_raw,
};
static struct trace_event trace_print_event = {
.type = TRACE_PRINT,
.funcs = &trace_print_funcs,
};
static struct trace_event *events[] __initdata = {
&trace_fn_event,

2
kernel/trace/trace_output.h
View File

@ -25,7 +25,7 @@ extern void trace_event_read_unlock(void);
extern struct trace_event *ftrace_find_event(int type);
extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
int flags);
int flags, struct trace_event *event);
extern int
trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry);

20
kernel/trace/trace_sched_switch.c
View File

@ -50,7 +50,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
}
static void
probe_sched_switch(struct task_struct *prev, struct task_struct *next)
probe_sched_switch(void *ignore, struct task_struct *prev, struct task_struct *next)
{
struct trace_array_cpu *data;
unsigned long flags;
@ -108,7 +108,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
}
static void
probe_sched_wakeup(struct task_struct *wakee, int success)
probe_sched_wakeup(void *ignore, struct task_struct *wakee, int success)
{
struct trace_array_cpu *data;
unsigned long flags;
@ -138,21 +138,21 @@ static int tracing_sched_register(void)
{
int ret;
ret = register_trace_sched_wakeup(probe_sched_wakeup);
ret = register_trace_sched_wakeup(probe_sched_wakeup, NULL);
if (ret) {
pr_info("wakeup trace: Couldn't activate tracepoint"
" probe to kernel_sched_wakeup\n");
return ret;
}
ret = register_trace_sched_wakeup_new(probe_sched_wakeup);
ret = register_trace_sched_wakeup_new(probe_sched_wakeup, NULL);
if (ret) {
pr_info("wakeup trace: Couldn't activate tracepoint"
" probe to kernel_sched_wakeup_new\n");
goto fail_deprobe;
}
ret = register_trace_sched_switch(probe_sched_switch);
ret = register_trace_sched_switch(probe_sched_switch, NULL);
if (ret) {
pr_info("sched trace: Couldn't activate tracepoint"
" probe to kernel_sched_switch\n");
@ -161,17 +161,17 @@ static int tracing_sched_register(void)
return ret;
fail_deprobe_wake_new:
unregister_trace_sched_wakeup_new(probe_sched_wakeup);
unregister_trace_sched_wakeup_new(probe_sched_wakeup, NULL);
fail_deprobe:
unregister_trace_sched_wakeup(probe_sched_wakeup);
unregister_trace_sched_wakeup(probe_sched_wakeup, NULL);
return ret;
}
static void tracing_sched_unregister(void)
{
unregister_trace_sched_switch(probe_sched_switch);
unregister_trace_sched_wakeup_new(probe_sched_wakeup);
unregister_trace_sched_wakeup(probe_sched_wakeup);
unregister_trace_sched_switch(probe_sched_switch, NULL);
unregister_trace_sched_wakeup_new(probe_sched_wakeup, NULL);
unregister_trace_sched_wakeup(probe_sched_wakeup, NULL);
}
static void tracing_start_sched_switch(void)

28
kernel/trace/trace_sched_wakeup.c
View File

@ -98,7 +98,8 @@ static int report_latency(cycle_t delta)
return 1;
}
static void probe_wakeup_migrate_task(struct task_struct *task, int cpu)
static void
probe_wakeup_migrate_task(void *ignore, struct task_struct *task, int cpu)
{
if (task != wakeup_task)
return;
@ -107,7 +108,8 @@ static void probe_wakeup_migrate_task(struct task_struct *task, int cpu)
}
static void notrace
probe_wakeup_sched_switch(struct task_struct *prev, struct task_struct *next)
probe_wakeup_sched_switch(void *ignore,
struct task_struct *prev, struct task_struct *next)
{
struct trace_array_cpu *data;
cycle_t T0, T1, delta;
@ -199,7 +201,7 @@ static void wakeup_reset(struct trace_array *tr)
}
static void
probe_wakeup(struct task_struct *p, int success)
probe_wakeup(void *ignore, struct task_struct *p, int success)
{
struct trace_array_cpu *data;
int cpu = smp_processor_id();
@ -263,28 +265,28 @@ static void start_wakeup_tracer(struct trace_array *tr)
{
int ret;
ret = register_trace_sched_wakeup(probe_wakeup);
ret = register_trace_sched_wakeup(probe_wakeup, NULL);
if (ret) {
pr_info("wakeup trace: Couldn't activate tracepoint"
" probe to kernel_sched_wakeup\n");
return;
}
ret = register_trace_sched_wakeup_new(probe_wakeup);
ret = register_trace_sched_wakeup_new(probe_wakeup, NULL);
if (ret) {
pr_info("wakeup trace: Couldn't activate tracepoint"
" probe to kernel_sched_wakeup_new\n");
goto fail_deprobe;
}
ret = register_trace_sched_switch(probe_wakeup_sched_switch);
ret = register_trace_sched_switch(probe_wakeup_sched_switch, NULL);
if (ret) {
pr_info("sched trace: Couldn't activate tracepoint"
" probe to kernel_sched_switch\n");
goto fail_deprobe_wake_new;
}
ret = register_trace_sched_migrate_task(probe_wakeup_migrate_task);
ret = register_trace_sched_migrate_task(probe_wakeup_migrate_task, NULL);
if (ret) {
pr_info("wakeup trace: Couldn't activate tracepoint"
" probe to kernel_sched_migrate_task\n");
@ -311,19 +313,19 @@ static void start_wakeup_tracer(struct trace_array *tr)
return;
fail_deprobe_wake_new:
unregister_trace_sched_wakeup_new(probe_wakeup);
unregister_trace_sched_wakeup_new(probe_wakeup, NULL);
fail_deprobe:
unregister_trace_sched_wakeup(probe_wakeup);
unregister_trace_sched_wakeup(probe_wakeup, NULL);
}
static void stop_wakeup_tracer(struct trace_array *tr)
{
tracer_enabled = 0;
unregister_ftrace_function(&trace_ops);
unregister_trace_sched_switch(probe_wakeup_sched_switch);
unregister_trace_sched_wakeup_new(probe_wakeup);
unregister_trace_sched_wakeup(probe_wakeup);
unregister_trace_sched_migrate_task(probe_wakeup_migrate_task);
unregister_trace_sched_switch(probe_wakeup_sched_switch, NULL);
unregister_trace_sched_wakeup_new(probe_wakeup, NULL);
unregister_trace_sched_wakeup(probe_wakeup, NULL);
unregister_trace_sched_migrate_task(probe_wakeup_migrate_task, NULL);
}
static int __wakeup_tracer_init(struct trace_array *tr)

135
kernel/trace/trace_syscalls.c
View File

@ -15,6 +15,54 @@ static int sys_refcount_exit;
static DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls);
static DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls);
static int syscall_enter_register(struct ftrace_event_call *event,
enum trace_reg type);
static int syscall_exit_register(struct ftrace_event_call *event,
enum trace_reg type);
static int syscall_enter_define_fields(struct ftrace_event_call *call);
static int syscall_exit_define_fields(struct ftrace_event_call *call);
static struct list_head *
syscall_get_enter_fields(struct ftrace_event_call *call)
{
struct syscall_metadata *entry = call->data;
return &entry->enter_fields;
}
static struct list_head *
syscall_get_exit_fields(struct ftrace_event_call *call)
{
struct syscall_metadata *entry = call->data;
return &entry->exit_fields;
}
struct trace_event_functions enter_syscall_print_funcs = {
.trace = print_syscall_enter,
};
struct trace_event_functions exit_syscall_print_funcs = {
.trace = print_syscall_exit,
};
struct ftrace_event_class event_class_syscall_enter = {
.system = "syscalls",
.reg = syscall_enter_register,
.define_fields = syscall_enter_define_fields,
.get_fields = syscall_get_enter_fields,
.raw_init = init_syscall_trace,
};
struct ftrace_event_class event_class_syscall_exit = {
.system = "syscalls",
.reg = syscall_exit_register,
.define_fields = syscall_exit_define_fields,
.get_fields = syscall_get_exit_fields,
.raw_init = init_syscall_trace,
};
extern unsigned long __start_syscalls_metadata[];
extern unsigned long __stop_syscalls_metadata[];
@ -53,7 +101,8 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr)
}
enum print_line_t
print_syscall_enter(struct trace_iterator *iter, int flags)
print_syscall_enter(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct trace_seq *s = &iter->seq;
struct trace_entry *ent = iter->ent;
@ -68,7 +117,7 @@ print_syscall_enter(struct trace_iterator *iter, int flags)
if (!entry)
goto end;
if (entry->enter_event->id != ent->type) {
if (entry->enter_event->event.type != ent->type) {
WARN_ON_ONCE(1);
goto end;
}
@ -105,7 +154,8 @@ print_syscall_enter(struct trace_iterator *iter, int flags)
}
enum print_line_t
print_syscall_exit(struct trace_iterator *iter, int flags)
print_syscall_exit(struct trace_iterator *iter, int flags,
struct trace_event *event)
{
struct trace_seq *s = &iter->seq;
struct trace_entry *ent = iter->ent;
@ -123,7 +173,7 @@ print_syscall_exit(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}
if (entry->exit_event->id != ent->type) {
if (entry->exit_event->event.type != ent->type) {
WARN_ON_ONCE(1);
return TRACE_TYPE_UNHANDLED;
}
@ -205,7 +255,7 @@ static void free_syscall_print_fmt(struct ftrace_event_call *call)
kfree(call->print_fmt);
}
int syscall_enter_define_fields(struct ftrace_event_call *call)
static int syscall_enter_define_fields(struct ftrace_event_call *call)
{
struct syscall_trace_enter trace;
struct syscall_metadata *meta = call->data;
@ -228,7 +278,7 @@ int syscall_enter_define_fields(struct ftrace_event_call *call)
return ret;
}
int syscall_exit_define_fields(struct ftrace_event_call *call)
static int syscall_exit_define_fields(struct ftrace_event_call *call)
{
struct syscall_trace_exit trace;
int ret;
@ -243,7 +293,7 @@ int syscall_exit_define_fields(struct ftrace_event_call *call)
return ret;
}
void ftrace_syscall_enter(struct pt_regs *regs, long id)
void ftrace_syscall_enter(void *ignore, struct pt_regs *regs, long id)
{
struct syscall_trace_enter *entry;
struct syscall_metadata *sys_data;
@ -265,7 +315,7 @@ void ftrace_syscall_enter(struct pt_regs *regs, long id)
size = sizeof(*entry) + sizeof(unsigned long) * sys_data->nb_args;
event = trace_current_buffer_lock_reserve(&buffer,
sys_data->enter_event->id, size, 0, 0);
sys_data->enter_event->event.type, size, 0, 0);
if (!event)
return;
@ -278,7 +328,7 @@ void ftrace_syscall_enter(struct pt_regs *regs, long id)
trace_current_buffer_unlock_commit(buffer, event, 0, 0);
}
void ftrace_syscall_exit(struct pt_regs *regs, long ret)
void ftrace_syscall_exit(void *ignore, struct pt_regs *regs, long ret)
{
struct syscall_trace_exit *entry;
struct syscall_metadata *sys_data;
@ -297,7 +347,7 @@ void ftrace_syscall_exit(struct pt_regs *regs, long ret)
return;
event = trace_current_buffer_lock_reserve(&buffer,
sys_data->exit_event->id, sizeof(*entry), 0, 0);
sys_data->exit_event->event.type, sizeof(*entry), 0, 0);
if (!event)
return;
@ -320,7 +370,7 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
if (!sys_refcount_enter)
ret = register_trace_sys_enter(ftrace_syscall_enter);
ret = register_trace_sys_enter(ftrace_syscall_enter, NULL);
if (!ret) {
set_bit(num, enabled_enter_syscalls);
sys_refcount_enter++;
@ -340,7 +390,7 @@ void unreg_event_syscall_enter(struct ftrace_event_call *call)
sys_refcount_enter--;
clear_bit(num, enabled_enter_syscalls);
if (!sys_refcount_enter)
unregister_trace_sys_enter(ftrace_syscall_enter);
unregister_trace_sys_enter(ftrace_syscall_enter, NULL);
mutex_unlock(&syscall_trace_lock);
}
@ -354,7 +404,7 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
if (!sys_refcount_exit)
ret = register_trace_sys_exit(ftrace_syscall_exit);
ret = register_trace_sys_exit(ftrace_syscall_exit, NULL);
if (!ret) {
set_bit(num, enabled_exit_syscalls);
sys_refcount_exit++;
@ -374,7 +424,7 @@ void unreg_event_syscall_exit(struct ftrace_event_call *call)
sys_refcount_exit--;
clear_bit(num, enabled_exit_syscalls);
if (!sys_refcount_exit)
unregister_trace_sys_exit(ftrace_syscall_exit);
unregister_trace_sys_exit(ftrace_syscall_exit, NULL);
mutex_unlock(&syscall_trace_lock);
}
@ -434,7 +484,7 @@ static DECLARE_BITMAP(enabled_perf_exit_syscalls, NR_syscalls);
static int sys_perf_refcount_enter;
static int sys_perf_refcount_exit;
static void perf_syscall_enter(struct pt_regs *regs, long id)
static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id)
{
struct syscall_metadata *sys_data;
struct syscall_trace_enter *rec;
@ -461,7 +511,7 @@ static void perf_syscall_enter(struct pt_regs *regs, long id)
return;
rec = (struct syscall_trace_enter *)perf_trace_buf_prepare(size,
sys_data->enter_event->id, regs, &rctx);
sys_data->enter_event->event.type, regs, &rctx);
if (!rec)
return;
@ -482,7 +532,7 @@ int perf_sysenter_enable(struct ftrace_event_call *call)
mutex_lock(&syscall_trace_lock);
if (!sys_perf_refcount_enter)
ret = register_trace_sys_enter(perf_syscall_enter);
ret = register_trace_sys_enter(perf_syscall_enter, NULL);
if (ret) {
pr_info("event trace: Could not activate"
"syscall entry trace point");
@ -504,11 +554,11 @@ void perf_sysenter_disable(struct ftrace_event_call *call)
sys_perf_refcount_enter--;
clear_bit(num, enabled_perf_enter_syscalls);
if (!sys_perf_refcount_enter)
unregister_trace_sys_enter(perf_syscall_enter);
unregister_trace_sys_enter(perf_syscall_enter, NULL);
mutex_unlock(&syscall_trace_lock);
}
static void perf_syscall_exit(struct pt_regs *regs, long ret)
static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret)
{
struct syscall_metadata *sys_data;
struct syscall_trace_exit *rec;
@ -538,7 +588,7 @@ static void perf_syscall_exit(struct pt_regs *regs, long ret)
return;
rec = (struct syscall_trace_exit *)perf_trace_buf_prepare(size,
sys_data->exit_event->id, regs, &rctx);
sys_data->exit_event->event.type, regs, &rctx);
if (!rec)
return;
@ -558,7 +608,7 @@ int perf_sysexit_enable(struct ftrace_event_call *call)
mutex_lock(&syscall_trace_lock);
if (!sys_perf_refcount_exit)
ret = register_trace_sys_exit(perf_syscall_exit);
ret = register_trace_sys_exit(perf_syscall_exit, NULL);
if (ret) {
pr_info("event trace: Could not activate"
"syscall exit trace point");
@ -580,9 +630,50 @@ void perf_sysexit_disable(struct ftrace_event_call *call)
sys_perf_refcount_exit--;
clear_bit(num, enabled_perf_exit_syscalls);
if (!sys_perf_refcount_exit)
unregister_trace_sys_exit(perf_syscall_exit);
unregister_trace_sys_exit(perf_syscall_exit, NULL);
mutex_unlock(&syscall_trace_lock);
}
#endif /* CONFIG_PERF_EVENTS */
static int syscall_enter_register(struct ftrace_event_call *event,
enum trace_reg type)
{
switch (type) {
case TRACE_REG_REGISTER:
return reg_event_syscall_enter(event);
case TRACE_REG_UNREGISTER:
unreg_event_syscall_enter(event);
return 0;
#ifdef CONFIG_PERF_EVENTS
case TRACE_REG_PERF_REGISTER:
return perf_sysenter_enable(event);
case TRACE_REG_PERF_UNREGISTER:
perf_sysenter_disable(event);
return 0;
#endif
}
return 0;
}
static int syscall_exit_register(struct ftrace_event_call *event,
enum trace_reg type)
{
switch (type) {
case TRACE_REG_REGISTER:
return reg_event_syscall_exit(event);
case TRACE_REG_UNREGISTER:
unreg_event_syscall_exit(event);
return 0;
#ifdef CONFIG_PERF_EVENTS
case TRACE_REG_PERF_REGISTER:
return perf_sysexit_enable(event);
case TRACE_REG_PERF_UNREGISTER:
perf_sysexit_disable(event);
return 0;
#endif
}
return 0;
}

26
kernel/trace/trace_workqueue.c
View File

@ -49,7 +49,8 @@ static void cpu_workqueue_stat_free(struct kref *kref)
/* Insertion of a work */
static void
probe_workqueue_insertion(struct task_struct *wq_thread,
probe_workqueue_insertion(void *ignore,
struct task_struct *wq_thread,
struct work_struct *work)
{
int cpu = cpumask_first(&wq_thread->cpus_allowed);
@ -70,7 +71,8 @@ probe_workqueue_insertion(struct task_struct *wq_thread,
/* Execution of a work */
static void
probe_workqueue_execution(struct task_struct *wq_thread,
probe_workqueue_execution(void *ignore,
struct task_struct *wq_thread,
struct work_struct *work)
{
int cpu = cpumask_first(&wq_thread->cpus_allowed);
@ -90,7 +92,8 @@ probe_workqueue_execution(struct task_struct *wq_thread,
}
/* Creation of a cpu workqueue thread */
static void probe_workqueue_creation(struct task_struct *wq_thread, int cpu)
static void probe_workqueue_creation(void *ignore,
struct task_struct *wq_thread, int cpu)
{
struct cpu_workqueue_stats *cws;
unsigned long flags;
@ -114,7 +117,8 @@ static void probe_workqueue_creation(struct task_struct *wq_thread, int cpu)
}
/* Destruction of a cpu workqueue thread */
static void probe_workqueue_destruction(struct task_struct *wq_thread)
static void
probe_workqueue_destruction(void *ignore, struct task_struct *wq_thread)
{
/* Workqueue only execute on one cpu */
int cpu = cpumask_first(&wq_thread->cpus_allowed);
@ -259,19 +263,19 @@ int __init trace_workqueue_early_init(void)
{
int ret, cpu;
ret = register_trace_workqueue_insertion(probe_workqueue_insertion);
ret = register_trace_workqueue_insertion(probe_workqueue_insertion, NULL);
if (ret)
goto out;
ret = register_trace_workqueue_execution(probe_workqueue_execution);
ret = register_trace_workqueue_execution(probe_workqueue_execution, NULL);
if (ret)
goto no_insertion;
ret = register_trace_workqueue_creation(probe_workqueue_creation);
ret = register_trace_workqueue_creation(probe_workqueue_creation, NULL);
if (ret)
goto no_execution;
ret = register_trace_workqueue_destruction(probe_workqueue_destruction);
ret = register_trace_workqueue_destruction(probe_workqueue_destruction, NULL);
if (ret)
goto no_creation;
@ -283,11 +287,11 @@ int __init trace_workqueue_early_init(void)
return 0;
no_creation:
unregister_trace_workqueue_creation(probe_workqueue_creation);
unregister_trace_workqueue_creation(probe_workqueue_creation, NULL);
no_execution:
unregister_trace_workqueue_execution(probe_workqueue_execution);
unregister_trace_workqueue_execution(probe_workqueue_execution, NULL);
no_insertion:
unregister_trace_workqueue_insertion(probe_workqueue_insertion);
unregister_trace_workqueue_insertion(probe_workqueue_insertion, NULL);
out:
pr_warning("trace_workqueue: unable to trace workqueues\n");

91
kernel/tracepoint.c
View File

@ -54,7 +54,7 @@ static struct hlist_head tracepoint_table[TRACEPOINT_TABLE_SIZE];
*/
struct tracepoint_entry {
struct hlist_node hlist;
void **funcs;
struct tracepoint_func *funcs;
int refcount; /* Number of times armed. 0 if disarmed. */
char name[0];
};
@ -64,12 +64,12 @@ struct tp_probes {
struct rcu_head rcu;
struct list_head list;
} u;
void *probes[0];
struct tracepoint_func probes[0];
};
static inline void *allocate_probes(int count)
{
struct tp_probes *p = kmalloc(count * sizeof(void *)
struct tp_probes *p = kmalloc(count * sizeof(struct tracepoint_func)
+ sizeof(struct tp_probes), GFP_KERNEL);
return p == NULL ? NULL : p->probes;
}
@ -79,7 +79,7 @@ static void rcu_free_old_probes(struct rcu_head *head)
kfree(container_of(head, struct tp_probes, u.rcu));
}
static inline void release_probes(void *old)
static inline void release_probes(struct tracepoint_func *old)
{
if (old) {
struct tp_probes *tp_probes = container_of(old,
@ -95,15 +95,16 @@ static void debug_print_probes(struct tracepoint_entry *entry)
if (!tracepoint_debug || !entry->funcs)
return;
for (i = 0; entry->funcs[i]; i++)
printk(KERN_DEBUG "Probe %d : %p\n", i, entry->funcs[i]);
for (i = 0; entry->funcs[i].func; i++)
printk(KERN_DEBUG "Probe %d : %p\n", i, entry->funcs[i].func);
}
static void *
tracepoint_entry_add_probe(struct tracepoint_entry *entry, void *probe)
static struct tracepoint_func *
tracepoint_entry_add_probe(struct tracepoint_entry *entry,
void *probe, void *data)
{
int nr_probes = 0;
void **old, **new;
struct tracepoint_func *old, *new;
WARN_ON(!probe);
@ -111,8 +112,9 @@ tracepoint_entry_add_probe(struct tracepoint_entry *entry, void *probe)
old = entry->funcs;
if (old) {
/* (N -> N+1), (N != 0, 1) probes */
for (nr_probes = 0; old[nr_probes]; nr_probes++)
if (old[nr_probes] == probe)
for (nr_probes = 0; old[nr_probes].func; nr_probes++)
if (old[nr_probes].func == probe &&
old[nr_probes].data == data)
return ERR_PTR(-EEXIST);
}
/* + 2 : one for new probe, one for NULL func */
@ -120,9 +122,10 @@ tracepoint_entry_add_probe(struct tracepoint_entry *entry, void *probe)
if (new == NULL)
return ERR_PTR(-ENOMEM);
if (old)
memcpy(new, old, nr_probes * sizeof(void *));
new[nr_probes] = probe;
new[nr_probes + 1] = NULL;
memcpy(new, old, nr_probes * sizeof(struct tracepoint_func));
new[nr_probes].func = probe;
new[nr_probes].data = data;
new[nr_probes + 1].func = NULL;
entry->refcount = nr_probes + 1;
entry->funcs = new;
debug_print_probes(entry);
@ -130,10 +133,11 @@ tracepoint_entry_add_probe(struct tracepoint_entry *entry, void *probe)
}
static void *
tracepoint_entry_remove_probe(struct tracepoint_entry *entry, void *probe)
tracepoint_entry_remove_probe(struct tracepoint_entry *entry,
void *probe, void *data)
{
int nr_probes = 0, nr_del = 0, i;
void **old, **new;
struct tracepoint_func *old, *new;
old = entry->funcs;
@ -142,8 +146,10 @@ tracepoint_entry_remove_probe(struct tracepoint_entry *entry, void *probe)
debug_print_probes(entry);
/* (N -> M), (N > 1, M >= 0) probes */
for (nr_probes = 0; old[nr_probes]; nr_probes++) {
if ((!probe || old[nr_probes] == probe))
for (nr_probes = 0; old[nr_probes].func; nr_probes++) {
if (!probe ||
(old[nr_probes].func == probe &&
old[nr_probes].data == data))
nr_del++;
}
@ -160,10 +166,11 @@ tracepoint_entry_remove_probe(struct tracepoint_entry *entry, void *probe)
new = allocate_probes(nr_probes - nr_del + 1);
if (new == NULL)
return ERR_PTR(-ENOMEM);
for (i = 0; old[i]; i++)
if ((probe && old[i] != probe))
for (i = 0; old[i].func; i++)
if (probe &&
(old[i].func != probe || old[i].data != data))
new[j++] = old[i];
new[nr_probes - nr_del] = NULL;
new[nr_probes - nr_del].func = NULL;
entry->refcount = nr_probes - nr_del;
entry->funcs = new;
}
@ -315,18 +322,19 @@ static void tracepoint_update_probes(void)
module_update_tracepoints();
}
static void *tracepoint_add_probe(const char *name, void *probe)
static struct tracepoint_func *
tracepoint_add_probe(const char *name, void *probe, void *data)
{
struct tracepoint_entry *entry;
void *old;
struct tracepoint_func *old;
entry = get_tracepoint(name);
if (!entry) {
entry = add_tracepoint(name);
if (IS_ERR(entry))
return entry;
return (struct tracepoint_func *)entry;
}
old = tracepoint_entry_add_probe(entry, probe);
old = tracepoint_entry_add_probe(entry, probe, data);
if (IS_ERR(old) && !entry->refcount)
remove_tracepoint(entry);
return old;
@ -340,12 +348,12 @@ static void *tracepoint_add_probe(const char *name, void *probe)
* Returns 0 if ok, error value on error.
* The probe address must at least be aligned on the architecture pointer size.
*/
int tracepoint_probe_register(const char *name, void *probe)
int tracepoint_probe_register(const char *name, void *probe, void *data)
{
void *old;
struct tracepoint_func *old;
mutex_lock(&tracepoints_mutex);
old = tracepoint_add_probe(name, probe);
old = tracepoint_add_probe(name, probe, data);
mutex_unlock(&tracepoints_mutex);
if (IS_ERR(old))
return PTR_ERR(old);
@ -356,15 +364,16 @@ int tracepoint_probe_register(const char *name, void *probe)
}
EXPORT_SYMBOL_GPL(tracepoint_probe_register);
static void *tracepoint_remove_probe(const char *name, void *probe)
static struct tracepoint_func *
tracepoint_remove_probe(const char *name, void *probe, void *data)
{
struct tracepoint_entry *entry;
void *old;
struct tracepoint_func *old;
entry = get_tracepoint(name);
if (!entry)
return ERR_PTR(-ENOENT);
old = tracepoint_entry_remove_probe(entry, probe);
old = tracepoint_entry_remove_probe(entry, probe, data);
if (IS_ERR(old))
return old;
if (!entry->refcount)
@ -382,12 +391,12 @@ static void *tracepoint_remove_probe(const char *name, void *probe)
* itself uses stop_machine(), which insures that every preempt disabled section
* have finished.
*/
int tracepoint_probe_unregister(const char *name, void *probe)
int tracepoint_probe_unregister(const char *name, void *probe, void *data)
{
void *old;
struct tracepoint_func *old;
mutex_lock(&tracepoints_mutex);
old = tracepoint_remove_probe(name, probe);
old = tracepoint_remove_probe(name, probe, data);
mutex_unlock(&tracepoints_mutex);
if (IS_ERR(old))
return PTR_ERR(old);
@ -418,12 +427,13 @@ static void tracepoint_add_old_probes(void *old)
*
* caller must call tracepoint_probe_update_all()
*/
int tracepoint_probe_register_noupdate(const char *name, void *probe)
int tracepoint_probe_register_noupdate(const char *name, void *probe,
void *data)
{
void *old;
struct tracepoint_func *old;
mutex_lock(&tracepoints_mutex);
old = tracepoint_add_probe(name, probe);
old = tracepoint_add_probe(name, probe, data);
if (IS_ERR(old)) {
mutex_unlock(&tracepoints_mutex);
return PTR_ERR(old);
@ -441,12 +451,13 @@ EXPORT_SYMBOL_GPL(tracepoint_probe_register_noupdate);
*
* caller must call tracepoint_probe_update_all()
*/
int tracepoint_probe_unregister_noupdate(const char *name, void *probe)
int tracepoint_probe_unregister_noupdate(const char *name, void *probe,
void *data)
{
void *old;
struct tracepoint_func *old;
mutex_lock(&tracepoints_mutex);
old = tracepoint_remove_probe(name, probe);
old = tracepoint_remove_probe(name, probe, data);
if (IS_ERR(old)) {
mutex_unlock(&tracepoints_mutex);
return PTR_ERR(old);

12
net/core/drop_monitor.c
View File

@ -172,12 +172,12 @@ static void trace_drop_common(struct sk_buff *skb, void *location)
return;
}
static void trace_kfree_skb_hit(struct sk_buff *skb, void *location)
static void trace_kfree_skb_hit(void *ignore, struct sk_buff *skb, void *location)
{
trace_drop_common(skb, location);
}
static void trace_napi_poll_hit(struct napi_struct *napi)
static void trace_napi_poll_hit(void *ignore, struct napi_struct *napi)
{
struct dm_hw_stat_delta *new_stat;
@ -225,12 +225,12 @@ static int set_all_monitor_traces(int state)
switch (state) {
case TRACE_ON:
rc |= register_trace_kfree_skb(trace_kfree_skb_hit);
rc |= register_trace_napi_poll(trace_napi_poll_hit);
rc |= register_trace_kfree_skb(trace_kfree_skb_hit, NULL);
rc |= register_trace_napi_poll(trace_napi_poll_hit, NULL);
break;
case TRACE_OFF:
rc |= unregister_trace_kfree_skb(trace_kfree_skb_hit);
rc |= unregister_trace_napi_poll(trace_napi_poll_hit);
rc |= unregister_trace_kfree_skb(trace_kfree_skb_hit, NULL);
rc |= unregister_trace_napi_poll(trace_napi_poll_hit, NULL);
tracepoint_synchronize_unregister();

4
samples/tracepoints/tp-samples-trace.h
View File

@ -7,7 +7,5 @@
DECLARE_TRACE(subsys_event,
TP_PROTO(struct inode *inode, struct file *file),
TP_ARGS(inode, file));
DECLARE_TRACE(subsys_eventb,
TP_PROTO(void),
TP_ARGS());
DECLARE_TRACE_NOARGS(subsys_eventb);
#endif

13
samples/tracepoints/tracepoint-probe-sample.c
View File

@ -13,7 +13,8 @@
* Here the caller only guarantees locking for struct file and struct inode.
* Locking must therefore be done in the probe to use the dentry.
*/
static void probe_subsys_event(struct inode *inode, struct file *file)
static void probe_subsys_event(void *ignore,
struct inode *inode, struct file *file)
{
path_get(&file->f_path);
dget(file->f_path.dentry);
@ -23,7 +24,7 @@ static void probe_subsys_event(struct inode *inode, struct file *file)
path_put(&file->f_path);
}
static void probe_subsys_eventb(void)
static void probe_subsys_eventb(void *ignore)
{
printk(KERN_INFO "Event B is encountered\n");
}
@ -32,9 +33,9 @@ static int __init tp_sample_trace_init(void)
{
int ret;
ret = register_trace_subsys_event(probe_subsys_event);
ret = register_trace_subsys_event(probe_subsys_event, NULL);
WARN_ON(ret);
ret = register_trace_subsys_eventb(probe_subsys_eventb);
ret = register_trace_subsys_eventb(probe_subsys_eventb, NULL);
WARN_ON(ret);
return 0;
@ -44,8 +45,8 @@ module_init(tp_sample_trace_init);
static void __exit tp_sample_trace_exit(void)
{
unregister_trace_subsys_eventb(probe_subsys_eventb);
unregister_trace_subsys_event(probe_subsys_event);
unregister_trace_subsys_eventb(probe_subsys_eventb, NULL);
unregister_trace_subsys_event(probe_subsys_event, NULL);
tracepoint_synchronize_unregister();
}

7
samples/tracepoints/tracepoint-probe-sample2.c
View File

@ -12,7 +12,8 @@
* Here the caller only guarantees locking for struct file and struct inode.
* Locking must therefore be done in the probe to use the dentry.
*/
static void probe_subsys_event(struct inode *inode, struct file *file)
static void probe_subsys_event(void *ignore,
struct inode *inode, struct file *file)
{
printk(KERN_INFO "Event is encountered with inode number %lu\n",
inode->i_ino);
@ -22,7 +23,7 @@ static int __init tp_sample_trace_init(void)
{
int ret;
ret = register_trace_subsys_event(probe_subsys_event);
ret = register_trace_subsys_event(probe_subsys_event, NULL);
WARN_ON(ret);
return 0;
@ -32,7 +33,7 @@ module_init(tp_sample_trace_init);
static void __exit tp_sample_trace_exit(void)
{
unregister_trace_subsys_event(probe_subsys_event);
unregister_trace_subsys_event(probe_subsys_event, NULL);
tracepoint_synchronize_unregister();
}