From bd1a5c849bdcc5c89e4a6a18216cd2b9a7a8a78f Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Thu, 13 Aug 2009 16:34:53 -0400
Subject: tracing: Ftrace dynamic ftrace_event_call support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Add dynamic ftrace_event_call support to ftrace. Trace engines can add
new ftrace_event_call to ftrace on the fly. Each operator function of
the call takes an ftrace_event_call data structure as an argument,
because these functions may be shared among several ftrace_event_calls.
Changes from v13:
- Define remove_subsystem_dir() always (revirt a2ca5e03), because
trace_remove_event_call() uses it.
- Modify syscall tracer because of ftrace_event_call change.
[fweisbec@gmail.com: Fixed conflict against latest tracing/core]
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Przemysław Pawełczyk <przemyslaw@pawelczyk.it>
Cc: Roland McGrath <roland@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
LKML-Reference: <20090813203453.31965.71901.stgit@localhost.localdomain>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
---
include/trace/syscall.h | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 5dc283ba5ae..e290b86f616 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -39,16 +39,19 @@ void set_syscall_enter_id(int num, int id);
void set_syscall_exit_id(int num, int id);
extern struct trace_event event_syscall_enter;
extern struct trace_event event_syscall_exit;
-extern int reg_event_syscall_enter(void *ptr);
-extern void unreg_event_syscall_enter(void *ptr);
-extern int reg_event_syscall_exit(void *ptr);
-extern void unreg_event_syscall_exit(void *ptr);
+
extern int syscall_enter_format(struct ftrace_event_call *call,
struct trace_seq *s);
extern int syscall_exit_format(struct ftrace_event_call *call,
struct trace_seq *s);
extern int syscall_enter_define_fields(struct ftrace_event_call *call);
extern int syscall_exit_define_fields(struct ftrace_event_call *call);
+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);
#endif
--
cgit v1.2.3-70-g09d2
From c44fc770845163f8d9e573f37f92a7b7a7ade14e Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Sat, 19 Sep 2009 06:50:42 +0200
Subject: tracing: Move syscalls metadata handling from arch to core
Most of the syscalls metadata processing is done from arch.
But these operations are mostly generic accross archs. Especially now
that we have a common variable name that expresses the number of
syscalls supported by an arch: NR_syscalls, the only remaining bits
that need to reside in arch is the syscall nr to addr translation.
v2: Compare syscalls symbols only after the "sys" prefix so that we
avoid spurious mismatches with archs that have syscalls wrappers,
in which case syscalls symbols have "SyS" prefixed aliases.
(Reported by: Heiko Carstens)
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
---
arch/s390/kernel/ftrace.c | 67 +--------------------------------
arch/x86/kernel/ftrace.c | 76 +-------------------------------------
include/trace/syscall.h | 2 +-
kernel/trace/trace_syscalls.c | 86 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 91 insertions(+), 140 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 57bdcb1e3cd..7c5752c3423 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -206,73 +206,10 @@ out:
#ifdef CONFIG_FTRACE_SYSCALLS
-extern unsigned long __start_syscalls_metadata[];
-extern unsigned long __stop_syscalls_metadata[];
extern unsigned int sys_call_table[];
-static struct syscall_metadata **syscalls_metadata;
-
-struct syscall_metadata *syscall_nr_to_meta(int nr)
-{
- if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
- return NULL;
-
- return syscalls_metadata[nr];
-}
-
-int syscall_name_to_nr(char *name)
-{
- int i;
-
- if (!syscalls_metadata)
- return -1;
- for (i = 0; i < NR_syscalls; i++)
- if (syscalls_metadata[i])
- if (!strcmp(syscalls_metadata[i]->name, name))
- return i;
- return -1;
-}
-
-void set_syscall_enter_id(int num, int id)
-{
- syscalls_metadata[num]->enter_id = id;
-}
-
-void set_syscall_exit_id(int num, int id)
+unsigned long __init arch_syscall_addr(int nr)
{
- syscalls_metadata[num]->exit_id = id;
-}
-
-static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
-{
- struct syscall_metadata *start;
- struct syscall_metadata *stop;
- char str[KSYM_SYMBOL_LEN];
-
- start = (struct syscall_metadata *)__start_syscalls_metadata;
- stop = (struct syscall_metadata *)__stop_syscalls_metadata;
- kallsyms_lookup(syscall, NULL, NULL, NULL, str);
-
- for ( ; start < stop; start++) {
- if (start->name && !strcmp(start->name + 3, str + 3))
- return start;
- }
- return NULL;
-}
-
-static int __init arch_init_ftrace_syscalls(void)
-{
- struct syscall_metadata *meta;
- int i;
- syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) * NR_syscalls,
- GFP_KERNEL);
- if (!syscalls_metadata)
- return -ENOMEM;
- for (i = 0; i < NR_syscalls; i++) {
- meta = find_syscall_meta((unsigned long)sys_call_table[i]);
- syscalls_metadata[i] = meta;
- }
- return 0;
+ return (unsigned long)sys_call_table[nr];
}
-arch_initcall(arch_init_ftrace_syscalls);
#endif
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 25e6f5fc4b1..5a1b9758fd6 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -470,82 +470,10 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
#ifdef CONFIG_FTRACE_SYSCALLS
-extern unsigned long __start_syscalls_metadata[];
-extern unsigned long __stop_syscalls_metadata[];
extern unsigned long *sys_call_table;
-static struct syscall_metadata **syscalls_metadata;
-
-static struct syscall_metadata *find_syscall_meta(unsigned long *syscall)
-{
- struct syscall_metadata *start;
- struct syscall_metadata *stop;
- char str[KSYM_SYMBOL_LEN];
-
-
- start = (struct syscall_metadata *)__start_syscalls_metadata;
- stop = (struct syscall_metadata *)__stop_syscalls_metadata;
- kallsyms_lookup((unsigned long) syscall, NULL, NULL, NULL, str);
-
- for ( ; start < stop; start++) {
- if (start->name && !strcmp(start->name, str))
- return start;
- }
- return NULL;
-}
-
-struct syscall_metadata *syscall_nr_to_meta(int nr)
-{
- if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
- return NULL;
-
- return syscalls_metadata[nr];
-}
-
-int syscall_name_to_nr(char *name)
-{
- int i;
-
- if (!syscalls_metadata)
- return -1;
-
- for (i = 0; i < NR_syscalls; i++) {
- if (syscalls_metadata[i]) {
- if (!strcmp(syscalls_metadata[i]->name, name))
- return i;
- }
- }
- return -1;
-}
-
-void set_syscall_enter_id(int num, int id)
-{
- syscalls_metadata[num]->enter_id = id;
-}
-
-void set_syscall_exit_id(int num, int id)
+unsigned long __init arch_syscall_addr(int nr)
{
- syscalls_metadata[num]->exit_id = id;
-}
-
-static int __init arch_init_ftrace_syscalls(void)
-{
- int i;
- struct syscall_metadata *meta;
- unsigned long **psys_syscall_table = &sys_call_table;
-
- syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *
- NR_syscalls, GFP_KERNEL);
- if (!syscalls_metadata) {
- WARN_ON(1);
- return -ENOMEM;
- }
-
- for (i = 0; i < NR_syscalls; i++) {
- meta = find_syscall_meta(psys_syscall_table[i]);
- syscalls_metadata[i] = meta;
- }
- return 0;
+ return (unsigned long)(&sys_call_table)[nr];
}
-arch_initcall(arch_init_ftrace_syscalls);
#endif
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 5dc283ba5ae..e972f0a40f8 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -33,7 +33,7 @@ struct syscall_metadata {
};
#ifdef CONFIG_FTRACE_SYSCALLS
-extern struct syscall_metadata *syscall_nr_to_meta(int nr);
+extern unsigned long arch_syscall_addr(int nr);
extern int syscall_name_to_nr(char *name);
void set_syscall_enter_id(int num, int id);
void set_syscall_exit_id(int num, int id);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 9fbce6c9d2e..8bda4bff228 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -14,6 +14,69 @@ static int sys_refcount_exit;
static DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls);
static DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls);
+extern unsigned long __start_syscalls_metadata[];
+extern unsigned long __stop_syscalls_metadata[];
+
+static struct syscall_metadata **syscalls_metadata;
+
+static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
+{
+ struct syscall_metadata *start;
+ struct syscall_metadata *stop;
+ char str[KSYM_SYMBOL_LEN];
+
+
+ start = (struct syscall_metadata *)__start_syscalls_metadata;
+ stop = (struct syscall_metadata *)__stop_syscalls_metadata;
+ kallsyms_lookup(syscall, NULL, NULL, NULL, str);
+
+ for ( ; start < stop; start++) {
+ /*
+ * Only compare after the "sys" prefix. Archs that use
+ * syscall wrappers may have syscalls symbols aliases prefixed
+ * with "SyS" instead of "sys", leading to an unwanted
+ * mismatch.
+ */
+ if (start->name && !strcmp(start->name + 3, str + 3))
+ return start;
+ }
+ return NULL;
+}
+
+static struct syscall_metadata *syscall_nr_to_meta(int nr)
+{
+ if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
+ return NULL;
+
+ return syscalls_metadata[nr];
+}
+
+int syscall_name_to_nr(char *name)
+{
+ int i;
+
+ if (!syscalls_metadata)
+ return -1;
+
+ for (i = 0; i < NR_syscalls; i++) {
+ if (syscalls_metadata[i]) {
+ if (!strcmp(syscalls_metadata[i]->name, name))
+ return i;
+ }
+ }
+ return -1;
+}
+
+void set_syscall_enter_id(int num, int id)
+{
+ syscalls_metadata[num]->enter_id = id;
+}
+
+void set_syscall_exit_id(int num, int id)
+{
+ syscalls_metadata[num]->exit_id = id;
+}
+
enum print_line_t
print_syscall_enter(struct trace_iterator *iter, int flags)
{
@@ -375,6 +438,29 @@ struct trace_event event_syscall_exit = {
.trace = print_syscall_exit,
};
+int __init init_ftrace_syscalls(void)
+{
+ struct syscall_metadata *meta;
+ unsigned long addr;
+ int i;
+
+ syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *
+ NR_syscalls, GFP_KERNEL);
+ if (!syscalls_metadata) {
+ WARN_ON(1);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < NR_syscalls; i++) {
+ addr = arch_syscall_addr(i);
+ meta = find_syscall_meta(addr);
+ syscalls_metadata[i] = meta;
+ }
+
+ return 0;
+}
+core_initcall(init_ftrace_syscalls);
+
#ifdef CONFIG_EVENT_PROFILE
static DECLARE_BITMAP(enabled_prof_enter_syscalls, NR_syscalls);
--
cgit v1.2.3-70-g09d2
From bf56a4ea9f1683c5b223fd3a5dbea23f1fa91c34 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 1 Dec 2009 16:23:20 +0800
Subject: trace_syscalls: Remove unused event_syscall_enter and
event_syscall_exit
fix event_enter_##sname->event
fix event_exit_##sname->event
remove unused event_syscall_enter and event_syscall_exit
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14D278.4090209@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/syscalls.h | 4 ++--
include/trace/syscall.h | 2 --
kernel/trace/trace_syscalls.c | 8 --------
3 files changed, 2 insertions(+), 12 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index b50974a93af..2f7c539ab96 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -178,7 +178,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
event_enter_##sname = { \
.name = "sys_enter"#sname, \
.system = "syscalls", \
- .event = &event_syscall_enter, \
+ .event = &enter_syscall_print_##sname, \
.raw_init = init_enter_##sname, \
.show_format = syscall_enter_format, \
.define_fields = syscall_enter_define_fields, \
@@ -214,7 +214,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
event_exit_##sname = { \
.name = "sys_exit"#sname, \
.system = "syscalls", \
- .event = &event_syscall_exit, \
+ .event = &exit_syscall_print_##sname, \
.raw_init = init_exit_##sname, \
.show_format = syscall_exit_format, \
.define_fields = syscall_exit_define_fields, \
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 51ee17d3632..5f8827c92db 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -37,8 +37,6 @@ extern unsigned long arch_syscall_addr(int nr);
extern int syscall_name_to_nr(char *name);
void set_syscall_enter_id(int num, int id);
void set_syscall_exit_id(int num, int id);
-extern struct trace_event event_syscall_enter;
-extern struct trace_event event_syscall_exit;
extern int syscall_enter_format(struct ftrace_event_call *call,
struct trace_seq *s);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 63aa8070365..00d6e176f5b 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -444,14 +444,6 @@ void unreg_event_syscall_exit(struct ftrace_event_call *call)
mutex_unlock(&syscall_trace_lock);
}
-struct trace_event event_syscall_enter = {
- .trace = print_syscall_enter,
-};
-
-struct trace_event event_syscall_exit = {
- .trace = print_syscall_exit,
-};
-
int __init init_ftrace_syscalls(void)
{
struct syscall_metadata *meta;
--
cgit v1.2.3-70-g09d2
From 31c16b13349970b2684248c7d8608d2a96ae135d Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 1 Dec 2009 16:23:30 +0800
Subject: trace_syscalls: Set event_enter_##sname->data to its metadata
Set event_enter_##sname->data to its metadata,
it makes codes simpler.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14D282.7050709@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/syscalls.h | 6 ++++--
include/trace/syscall.h | 2 +-
kernel/trace/trace_syscalls.c | 36 +++++++++++-------------------------
3 files changed, 16 insertions(+), 28 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 2f7c539ab96..d3c9fd01a11 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -153,6 +153,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
#define __SC_STR_TDECL6(t, a, ...) #t, __SC_STR_TDECL5(__VA_ARGS__)
#define SYSCALL_TRACE_ENTER_EVENT(sname) \
+ static const struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call event_enter_##sname; \
struct trace_event enter_syscall_print_##sname = { \
.trace = print_syscall_enter, \
@@ -184,11 +185,12 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
.define_fields = syscall_enter_define_fields, \
.regfunc = reg_event_syscall_enter, \
.unregfunc = unreg_event_syscall_enter, \
- .data = "sys"#sname, \
+ .data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_ENTER_PROFILE_INIT(sname) \
}
#define SYSCALL_TRACE_EXIT_EVENT(sname) \
+ static const struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call event_exit_##sname; \
struct trace_event exit_syscall_print_##sname = { \
.trace = print_syscall_exit, \
@@ -220,7 +222,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
.define_fields = syscall_exit_define_fields, \
.regfunc = reg_event_syscall_exit, \
.unregfunc = unreg_event_syscall_exit, \
- .data = "sys"#sname, \
+ .data = (void *)&__syscall_meta_##sname,\
TRACE_SYS_EXIT_PROFILE_INIT(sname) \
}
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 5f8827c92db..c5265c81c4e 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -34,7 +34,7 @@ struct syscall_metadata {
#ifdef CONFIG_FTRACE_SYSCALLS
extern unsigned long arch_syscall_addr(int nr);
-extern int syscall_name_to_nr(char *name);
+extern int syscall_name_to_nr(const char *name);
void set_syscall_enter_id(int num, int id);
void set_syscall_exit_id(int num, int id);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 00d6e176f5b..39649b1675d 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -51,7 +51,7 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr)
return syscalls_metadata[nr];
}
-int syscall_name_to_nr(char *name)
+int syscall_name_to_nr(const char *name)
{
int i;
@@ -172,18 +172,11 @@ extern char *__bad_type_size(void);
int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
{
int i;
- int nr;
int ret;
- struct syscall_metadata *entry;
+ struct syscall_metadata *entry = call->data;
struct syscall_trace_enter trace;
int offset = offsetof(struct syscall_trace_enter, args);
- nr = syscall_name_to_nr(call->data);
- entry = syscall_nr_to_meta(nr);
-
- if (!entry)
- return 0;
-
ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n",
SYSCALL_FIELD(int, nr));
@@ -245,18 +238,11 @@ int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
int syscall_enter_define_fields(struct ftrace_event_call *call)
{
struct syscall_trace_enter trace;
- struct syscall_metadata *meta;
+ struct syscall_metadata *meta = call->data;
int ret;
- int nr;
int i;
int offset = offsetof(typeof(trace), args);
- nr = syscall_name_to_nr(call->data);
- meta = syscall_nr_to_meta(nr);
-
- if (!meta)
- return 0;
-
ret = trace_define_common_fields(call);
if (ret)
return ret;
@@ -366,9 +352,9 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- char *name;
+ const char *name;
- name = (char *)call->data;
+ name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
@@ -389,9 +375,9 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
void unreg_event_syscall_enter(struct ftrace_event_call *call)
{
int num;
- char *name;
+ const char *name;
- name = (char *)call->data;
+ name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return;
@@ -407,9 +393,9 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- char *name;
+ const char *name;
- name = call->data;
+ name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
@@ -430,9 +416,9 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
void unreg_event_syscall_exit(struct ftrace_event_call *call)
{
int num;
- char *name;
+ const char *name;
- name = call->data;
+ name = ((struct syscall_metadata *)call->data)->name;
num = syscall_name_to_nr(name);
if (num < 0 || num >= NR_syscalls)
return;
--
cgit v1.2.3-70-g09d2
From fcc19438dda38dacc8c144e2db3ebc6b9fd4f8b8 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 1 Dec 2009 16:23:36 +0800
Subject: trace_syscalls: Remove enter_id exit_id
use ->enter_event->id instead of ->enter_id
use ->exit_event->id instead of ->exit_id
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14D288.7030001@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/syscalls.h | 2 --
include/trace/syscall.h | 6 ------
kernel/trace/trace_syscalls.c | 30 ++++++++++--------------------
3 files changed, 10 insertions(+), 28 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index d3c9fd01a11..b9af87560ad 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -168,7 +168,6 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
if (!id) \
return -ENODEV; \
event_enter_##sname.id = id; \
- set_syscall_enter_id(num, id); \
INIT_LIST_HEAD(&event_enter_##sname.fields); \
return 0; \
} \
@@ -205,7 +204,6 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
if (!id) \
return -ENODEV; \
event_exit_##sname.id = id; \
- set_syscall_exit_id(num, id); \
INIT_LIST_HEAD(&event_exit_##sname.fields); \
return 0; \
} \
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index c5265c81c4e..ca09561cd57 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -15,8 +15,6 @@
* @nb_args: number of parameters it takes
* @types: list of types as strings
* @args: list of args as strings (args[i] matches types[i])
- * @enter_id: associated ftrace enter event id
- * @exit_id: associated ftrace exit event id
* @enter_event: associated syscall_enter trace event
* @exit_event: associated syscall_exit trace event
*/
@@ -25,8 +23,6 @@ struct syscall_metadata {
int nb_args;
const char **types;
const char **args;
- int enter_id;
- int exit_id;
struct ftrace_event_call *enter_event;
struct ftrace_event_call *exit_event;
@@ -35,8 +31,6 @@ struct syscall_metadata {
#ifdef CONFIG_FTRACE_SYSCALLS
extern unsigned long arch_syscall_addr(int nr);
extern int syscall_name_to_nr(const char *name);
-void set_syscall_enter_id(int num, int id);
-void set_syscall_exit_id(int num, int id);
extern int syscall_enter_format(struct ftrace_event_call *call,
struct trace_seq *s);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 39649b1675d..27eb18d6922 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -67,16 +67,6 @@ int syscall_name_to_nr(const char *name)
return -1;
}
-void set_syscall_enter_id(int num, int id)
-{
- syscalls_metadata[num]->enter_id = id;
-}
-
-void set_syscall_exit_id(int num, int id)
-{
- syscalls_metadata[num]->exit_id = id;
-}
-
enum print_line_t
print_syscall_enter(struct trace_iterator *iter, int flags)
{
@@ -93,7 +83,7 @@ print_syscall_enter(struct trace_iterator *iter, int flags)
if (!entry)
goto end;
- if (entry->enter_id != ent->type) {
+ if (entry->enter_event->id != ent->type) {
WARN_ON_ONCE(1);
goto end;
}
@@ -148,7 +138,7 @@ print_syscall_exit(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}
- if (entry->exit_id != ent->type) {
+ if (entry->exit_event->id != ent->type) {
WARN_ON_ONCE(1);
return TRACE_TYPE_UNHANDLED;
}
@@ -302,8 +292,8 @@ 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_id,
- size, 0, 0);
+ event = trace_current_buffer_lock_reserve(&buffer,
+ sys_data->enter_event->id, size, 0, 0);
if (!event)
return;
@@ -334,8 +324,8 @@ void ftrace_syscall_exit(struct pt_regs *regs, long ret)
if (!sys_data)
return;
- event = trace_current_buffer_lock_reserve(&buffer, sys_data->exit_id,
- sizeof(*entry), 0, 0);
+ event = trace_current_buffer_lock_reserve(&buffer,
+ sys_data->exit_event->id, sizeof(*entry), 0, 0);
if (!event)
return;
@@ -510,11 +500,11 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
rec = (struct syscall_trace_enter *) raw_data;
tracing_generic_entry_update(&rec->ent, 0, 0);
- rec->ent.type = sys_data->enter_id;
+ rec->ent.type = sys_data->enter_event->id;
rec->nr = syscall_nr;
syscall_get_arguments(current, regs, 0, sys_data->nb_args,
(unsigned long *)&rec->args);
- perf_tp_event(sys_data->enter_id, 0, 1, rec, size);
+ perf_tp_event(sys_data->enter_event->id, 0, 1, rec, size);
end:
perf_swevent_put_recursion_context(rctx);
@@ -615,11 +605,11 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
rec = (struct syscall_trace_exit *)raw_data;
tracing_generic_entry_update(&rec->ent, 0, 0);
- rec->ent.type = sys_data->exit_id;
+ rec->ent.type = sys_data->exit_event->id;
rec->nr = syscall_nr;
rec->ret = syscall_get_return_value(current, regs);
- perf_tp_event(sys_data->exit_id, 0, 1, rec, size);
+ perf_tp_event(sys_data->exit_event->id, 0, 1, rec, size);
end:
perf_swevent_put_recursion_context(rctx);
--
cgit v1.2.3-70-g09d2
From c252f65793874b56d50395ab604db465ce688665 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 1 Dec 2009 16:23:47 +0800
Subject: trace_syscalls: Add syscall_nr field to struct syscall_metadata
Add syscall_nr field to struct syscall_metadata,
it helps us to get syscall number easier.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14D293.6090800@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/syscalls.h | 4 ++--
include/trace/syscall.h | 3 ++-
kernel/trace/trace_syscalls.c | 22 +++++++++-------------
3 files changed, 13 insertions(+), 16 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index b9af87560ad..3c280d7ecb7 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -161,7 +161,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
static int init_enter_##sname(struct ftrace_event_call *call) \
{ \
int num, id; \
- num = syscall_name_to_nr("sys"#sname); \
+ num = __syscall_meta_##sname.syscall_nr; \
if (num < 0) \
return -ENOSYS; \
id = register_ftrace_event(&enter_syscall_print_##sname);\
@@ -197,7 +197,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
static int init_exit_##sname(struct ftrace_event_call *call) \
{ \
int num, id; \
- num = syscall_name_to_nr("sys"#sname); \
+ num = __syscall_meta_##sname.syscall_nr; \
if (num < 0) \
return -ENOSYS; \
id = register_ftrace_event(&exit_syscall_print_##sname);\
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index ca09561cd57..1531eef3071 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -12,6 +12,7 @@
* A syscall entry in the ftrace syscalls array.
*
* @name: name of the syscall
+ * @syscall_nr: number of the syscall
* @nb_args: number of parameters it takes
* @types: list of types as strings
* @args: list of args as strings (args[i] matches types[i])
@@ -20,6 +21,7 @@
*/
struct syscall_metadata {
const char *name;
+ int syscall_nr;
int nb_args;
const char **types;
const char **args;
@@ -30,7 +32,6 @@ struct syscall_metadata {
#ifdef CONFIG_FTRACE_SYSCALLS
extern unsigned long arch_syscall_addr(int nr);
-extern int syscall_name_to_nr(const char *name);
extern int syscall_enter_format(struct ftrace_event_call *call,
struct trace_seq *s);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 27eb18d6922..144cc14d855 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -51,7 +51,7 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr)
return syscalls_metadata[nr];
}
-int syscall_name_to_nr(const char *name)
+static int syscall_name_to_nr(const char *name)
{
int i;
@@ -342,10 +342,8 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
@@ -365,10 +363,8 @@ int reg_event_syscall_enter(struct ftrace_event_call *call)
void unreg_event_syscall_enter(struct ftrace_event_call *call)
{
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return;
mutex_lock(&syscall_trace_lock);
@@ -383,10 +379,8 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return -ENOSYS;
mutex_lock(&syscall_trace_lock);
@@ -406,10 +400,8 @@ int reg_event_syscall_exit(struct ftrace_event_call *call)
void unreg_event_syscall_exit(struct ftrace_event_call *call)
{
int num;
- const char *name;
- name = ((struct syscall_metadata *)call->data)->name;
- num = syscall_name_to_nr(name);
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
if (num < 0 || num >= NR_syscalls)
return;
mutex_lock(&syscall_trace_lock);
@@ -436,6 +428,10 @@ int __init init_ftrace_syscalls(void)
for (i = 0; i < NR_syscalls; i++) {
addr = arch_syscall_addr(i);
meta = find_syscall_meta(addr);
+ if (!meta)
+ continue;
+
+ meta->syscall_nr = i;
syscalls_metadata[i] = meta;
}
--
cgit v1.2.3-70-g09d2
From a1301da0997bf73c44dbe584e9070a13adc89672 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 1 Dec 2009 16:23:55 +0800
Subject: trace_syscalls: Remove duplicate init_enter_##sname()
use only one init_syscall_trace instead of
many init_enter_##sname()/init_exit_##sname()
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14D29B.6090708@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/syscalls.h | 30 ++----------------------------
include/trace/syscall.h | 1 +
kernel/trace/trace_syscalls.c | 12 ++++++++++++
3 files changed, 15 insertions(+), 28 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 3c280d7ecb7..cf0d923ea40 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -158,19 +158,6 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
struct trace_event enter_syscall_print_##sname = { \
.trace = print_syscall_enter, \
}; \
- static int init_enter_##sname(struct ftrace_event_call *call) \
- { \
- int num, id; \
- num = __syscall_meta_##sname.syscall_nr; \
- if (num < 0) \
- return -ENOSYS; \
- id = register_ftrace_event(&enter_syscall_print_##sname);\
- if (!id) \
- return -ENODEV; \
- event_enter_##sname.id = id; \
- INIT_LIST_HEAD(&event_enter_##sname.fields); \
- return 0; \
- } \
TRACE_SYS_ENTER_PROFILE(sname); \
static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
@@ -179,7 +166,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
.name = "sys_enter"#sname, \
.system = "syscalls", \
.event = &enter_syscall_print_##sname, \
- .raw_init = init_enter_##sname, \
+ .raw_init = init_syscall_trace, \
.show_format = syscall_enter_format, \
.define_fields = syscall_enter_define_fields, \
.regfunc = reg_event_syscall_enter, \
@@ -194,19 +181,6 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
struct trace_event exit_syscall_print_##sname = { \
.trace = print_syscall_exit, \
}; \
- static int init_exit_##sname(struct ftrace_event_call *call) \
- { \
- int num, id; \
- num = __syscall_meta_##sname.syscall_nr; \
- if (num < 0) \
- return -ENOSYS; \
- id = register_ftrace_event(&exit_syscall_print_##sname);\
- if (!id) \
- return -ENODEV; \
- event_exit_##sname.id = id; \
- INIT_LIST_HEAD(&event_exit_##sname.fields); \
- return 0; \
- } \
TRACE_SYS_EXIT_PROFILE(sname); \
static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
@@ -215,7 +189,7 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
.name = "sys_exit"#sname, \
.system = "syscalls", \
.event = &exit_syscall_print_##sname, \
- .raw_init = init_exit_##sname, \
+ .raw_init = init_syscall_trace, \
.show_format = syscall_exit_format, \
.define_fields = syscall_exit_define_fields, \
.regfunc = reg_event_syscall_exit, \
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 1531eef3071..dff9371e527 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -32,6 +32,7 @@ struct syscall_metadata {
#ifdef CONFIG_FTRACE_SYSCALLS
extern unsigned long arch_syscall_addr(int nr);
+extern int init_syscall_trace(struct ftrace_event_call *call);
extern int syscall_enter_format(struct ftrace_event_call *call,
struct trace_seq *s);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 144cc14d855..c6514093c95 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -412,6 +412,18 @@ void unreg_event_syscall_exit(struct ftrace_event_call *call)
mutex_unlock(&syscall_trace_lock);
}
+int init_syscall_trace(struct ftrace_event_call *call)
+{
+ int id;
+
+ id = register_ftrace_event(call->event);
+ if (!id)
+ return -ENODEV;
+ call->id = id;
+ INIT_LIST_HEAD(&call->fields);
+ return 0;
+}
+
int __init init_ftrace_syscalls(void)
{
struct syscall_metadata *meta;
--
cgit v1.2.3-70-g09d2
From 3bbe84e9d385205d638035ee9dcc4db1b486ea08 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 1 Dec 2009 16:24:01 +0800
Subject: trace_syscalls: Simplify syscall profile
use only one prof_sysenter_enable() instead of
prof_sysenter_enable_##sname()
use only one prof_sysenter_disable() instead of
prof_sysenter_disable_##sname()
use only one prof_sysexit_enable() instead of
prof_sysexit_enable_##sname()
use only one prof_sysexit_disable() instead of
prof_sysexit_disable_##sname()
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4B14D2A1.8060304@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/syscalls.h | 31 ++++---------------------------
include/trace/syscall.h | 8 ++++----
kernel/trace/trace_syscalls.c | 24 ++++++++----------------
3 files changed, 16 insertions(+), 47 deletions(-)
(limited to 'include/trace/syscall.h')
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index cf0d923ea40..c2df3a59323 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -99,37 +99,16 @@ struct perf_event_attr;
#define __SC_TEST6(t6, a6, ...) __SC_TEST(t6); __SC_TEST5(__VA_ARGS__)
#ifdef CONFIG_EVENT_PROFILE
-#define TRACE_SYS_ENTER_PROFILE(sname) \
-static int prof_sysenter_enable_##sname(struct ftrace_event_call *unused) \
-{ \
- return reg_prof_syscall_enter("sys"#sname); \
-} \
- \
-static void prof_sysenter_disable_##sname(struct ftrace_event_call *unused) \
-{ \
- unreg_prof_syscall_enter("sys"#sname); \
-}
-
-#define TRACE_SYS_EXIT_PROFILE(sname) \
-static int prof_sysexit_enable_##sname(struct ftrace_event_call *unused) \
-{ \
- return reg_prof_syscall_exit("sys"#sname); \
-} \
- \
-static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
-{ \
- unreg_prof_syscall_exit("sys"#sname); \
-}
#define TRACE_SYS_ENTER_PROFILE_INIT(sname) \
.profile_count = ATOMIC_INIT(-1), \
- .profile_enable = prof_sysenter_enable_##sname, \
- .profile_disable = prof_sysenter_disable_##sname,
+ .profile_enable = prof_sysenter_enable, \
+ .profile_disable = prof_sysenter_disable,
#define TRACE_SYS_EXIT_PROFILE_INIT(sname) \
.profile_count = ATOMIC_INIT(-1), \
- .profile_enable = prof_sysexit_enable_##sname, \
- .profile_disable = prof_sysexit_disable_##sname,
+ .profile_enable = prof_sysexit_enable, \
+ .profile_disable = prof_sysexit_disable,
#else
#define TRACE_SYS_ENTER_PROFILE(sname)
#define TRACE_SYS_ENTER_PROFILE_INIT(sname)
@@ -158,7 +137,6 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
struct trace_event enter_syscall_print_##sname = { \
.trace = print_syscall_enter, \
}; \
- TRACE_SYS_ENTER_PROFILE(sname); \
static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) \
@@ -181,7 +159,6 @@ static void prof_sysexit_disable_##sname(struct ftrace_event_call *unused) \
struct trace_event exit_syscall_print_##sname = { \
.trace = print_syscall_exit, \
}; \
- TRACE_SYS_EXIT_PROFILE(sname); \
static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) \
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index dff9371e527..961fda3556b 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -50,10 +50,10 @@ enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
#endif
#ifdef CONFIG_EVENT_PROFILE
-int reg_prof_syscall_enter(char *name);
-void unreg_prof_syscall_enter(char *name);
-int reg_prof_syscall_exit(char *name);
-void unreg_prof_syscall_exit(char *name);
+int prof_sysenter_enable(struct ftrace_event_call *call);
+void prof_sysenter_disable(struct ftrace_event_call *call);
+int prof_sysexit_enable(struct ftrace_event_call *call);
+void prof_sysexit_disable(struct ftrace_event_call *call);
#endif
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index c6514093c95..1e85b6cc26a 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -520,14 +520,12 @@ end_recursion:
local_irq_restore(flags);
}
-int reg_prof_syscall_enter(char *name)
+int prof_sysenter_enable(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- num = syscall_name_to_nr(name);
- if (num < 0 || num >= NR_syscalls)
- return -ENOSYS;
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
if (!sys_prof_refcount_enter)
@@ -543,13 +541,11 @@ int reg_prof_syscall_enter(char *name)
return ret;
}
-void unreg_prof_syscall_enter(char *name)
+void prof_sysenter_disable(struct ftrace_event_call *call)
{
int num;
- num = syscall_name_to_nr(name);
- if (num < 0 || num >= NR_syscalls)
- return;
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
sys_prof_refcount_enter--;
@@ -625,14 +621,12 @@ end_recursion:
local_irq_restore(flags);
}
-int reg_prof_syscall_exit(char *name)
+int prof_sysexit_enable(struct ftrace_event_call *call)
{
int ret = 0;
int num;
- num = syscall_name_to_nr(name);
- if (num < 0 || num >= NR_syscalls)
- return -ENOSYS;
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
if (!sys_prof_refcount_exit)
@@ -648,13 +642,11 @@ int reg_prof_syscall_exit(char *name)
return ret;
}
-void unreg_prof_syscall_exit(char *name)
+void prof_sysexit_disable(struct ftrace_event_call *call)
{
int num;
- num = syscall_name_to_nr(name);
- if (num < 0 || num >= NR_syscalls)
- return;
+ num = ((struct syscall_metadata *)call->data)->syscall_nr;
mutex_lock(&syscall_trace_lock);
sys_prof_refcount_exit--;
--
cgit v1.2.3-70-g09d2