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Diffstat (limited to 'kernel/trace/trace_events.c')
-rw-r--r--kernel/trace/trace_events.c85
1 files changed, 32 insertions, 53 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 78b1ed23017..56c260b83a9 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -21,6 +21,7 @@
#include "trace_output.h"
+#undef TRACE_SYSTEM
#define TRACE_SYSTEM "TRACE_SYSTEM"
DEFINE_MUTEX(event_mutex);
@@ -86,7 +87,7 @@ int trace_define_common_fields(struct ftrace_event_call *call)
__common_field(unsigned char, flags);
__common_field(unsigned char, preempt_count);
__common_field(int, pid);
- __common_field(int, tgid);
+ __common_field(int, lock_depth);
return ret;
}
@@ -230,11 +231,9 @@ static ssize_t
ftrace_event_write(struct file *file, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
+ struct trace_parser parser;
size_t read = 0;
- int i, set = 1;
ssize_t ret;
- char *buf;
- char ch;
if (!cnt || cnt < 0)
return 0;
@@ -243,60 +242,28 @@ ftrace_event_write(struct file *file, const char __user *ubuf,
if (ret < 0)
return ret;
- ret = get_user(ch, ubuf++);
- if (ret)
- return ret;
- read++;
- cnt--;
-
- /* skip white space */
- while (cnt && isspace(ch)) {
- ret = get_user(ch, ubuf++);
- if (ret)
- return ret;
- read++;
- cnt--;
- }
-
- /* Only white space found? */
- if (isspace(ch)) {
- file->f_pos += read;
- ret = read;
- return ret;
- }
-
- buf = kmalloc(EVENT_BUF_SIZE+1, GFP_KERNEL);
- if (!buf)
+ if (trace_parser_get_init(&parser, EVENT_BUF_SIZE + 1))
return -ENOMEM;
- if (cnt > EVENT_BUF_SIZE)
- cnt = EVENT_BUF_SIZE;
+ read = trace_get_user(&parser, ubuf, cnt, ppos);
+
+ if (trace_parser_loaded((&parser))) {
+ int set = 1;
- i = 0;
- while (cnt && !isspace(ch)) {
- if (!i && ch == '!')
+ if (*parser.buffer == '!')
set = 0;
- else
- buf[i++] = ch;
- ret = get_user(ch, ubuf++);
+ parser.buffer[parser.idx] = 0;
+
+ ret = ftrace_set_clr_event(parser.buffer + !set, set);
if (ret)
- goto out_free;
- read++;
- cnt--;
+ goto out_put;
}
- buf[i] = 0;
-
- file->f_pos += read;
-
- ret = ftrace_set_clr_event(buf, set);
- if (ret)
- goto out_free;
ret = read;
- out_free:
- kfree(buf);
+ out_put:
+ trace_parser_put(&parser);
return ret;
}
@@ -578,7 +545,7 @@ static int trace_write_header(struct trace_seq *s)
FIELD(unsigned char, flags),
FIELD(unsigned char, preempt_count),
FIELD(int, pid),
- FIELD(int, tgid));
+ FIELD(int, lock_depth));
}
static ssize_t
@@ -1187,7 +1154,7 @@ static int trace_module_notify(struct notifier_block *self,
}
#endif /* CONFIG_MODULES */
-struct notifier_block trace_module_nb = {
+static struct notifier_block trace_module_nb = {
.notifier_call = trace_module_notify,
.priority = 0,
};
@@ -1359,6 +1326,18 @@ static __init void event_trace_self_tests(void)
if (!call->regfunc)
continue;
+/*
+ * Testing syscall events here is pretty useless, but
+ * we still do it if configured. But this is time consuming.
+ * What we really need is a user thread to perform the
+ * syscalls as we test.
+ */
+#ifndef CONFIG_EVENT_TRACE_TEST_SYSCALLS
+ if (call->system &&
+ strcmp(call->system, "syscalls") == 0)
+ continue;
+#endif
+
pr_info("Testing event %s: ", call->name);
/*
@@ -1432,7 +1411,7 @@ static __init void event_trace_self_tests(void)
#ifdef CONFIG_FUNCTION_TRACER
-static DEFINE_PER_CPU(atomic_t, test_event_disable);
+static DEFINE_PER_CPU(atomic_t, ftrace_test_event_disable);
static void
function_test_events_call(unsigned long ip, unsigned long parent_ip)
@@ -1449,7 +1428,7 @@ function_test_events_call(unsigned long ip, unsigned long parent_ip)
pc = preempt_count();
resched = ftrace_preempt_disable();
cpu = raw_smp_processor_id();
- disabled = atomic_inc_return(&per_cpu(test_event_disable, cpu));
+ disabled = atomic_inc_return(&per_cpu(ftrace_test_event_disable, cpu));
if (disabled != 1)
goto out;
@@ -1468,7 +1447,7 @@ function_test_events_call(unsigned long ip, unsigned long parent_ip)
trace_nowake_buffer_unlock_commit(buffer, event, flags, pc);
out:
- atomic_dec(&per_cpu(test_event_disable, cpu));
+ atomic_dec(&per_cpu(ftrace_test_event_disable, cpu));
ftrace_preempt_enable(resched);
}