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Subject[PATCH v5 06/19] tracing: probeevent: Cleanup argument field definition
Date
Cleanup event argument definition code in one place for
maintenancability.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/trace_kprobe.c | 32 ++++----------------------------
kernel/trace/trace_probe.c | 21 +++++++++++++++++++++
kernel/trace/trace_probe.h | 2 ++
kernel/trace/trace_uprobe.c | 15 ++-------------
4 files changed, 29 insertions(+), 41 deletions(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 81e2eb5a1566..a8f8cce066a9 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1146,49 +1146,25 @@ print_kretprobe_event(struct trace_iterator *iter, int flags,

static int kprobe_event_define_fields(struct trace_event_call *event_call)
{
- int ret, i;
+ int ret;
struct kprobe_trace_entry_head field;
struct trace_kprobe *tk = (struct trace_kprobe *)event_call->data;

DEFINE_FIELD(unsigned long, ip, FIELD_STRING_IP, 0);
- /* Set argument names as fields */
- for (i = 0; i < tk->tp.nr_args; i++) {
- struct probe_arg *parg = &tk->tp.args[i];

- ret = trace_define_field(event_call, parg->type->fmttype,
- parg->name,
- sizeof(field) + parg->offset,
- parg->type->size,
- parg->type->is_signed,
- FILTER_OTHER);
- if (ret)
- return ret;
- }
- return 0;
+ return traceprobe_define_arg_fields(event_call, sizeof(field), &tk->tp);
}

static int kretprobe_event_define_fields(struct trace_event_call *event_call)
{
- int ret, i;
+ int ret;
struct kretprobe_trace_entry_head field;
struct trace_kprobe *tk = (struct trace_kprobe *)event_call->data;

DEFINE_FIELD(unsigned long, func, FIELD_STRING_FUNC, 0);
DEFINE_FIELD(unsigned long, ret_ip, FIELD_STRING_RETIP, 0);
- /* Set argument names as fields */
- for (i = 0; i < tk->tp.nr_args; i++) {
- struct probe_arg *parg = &tk->tp.args[i];

- ret = trace_define_field(event_call, parg->type->fmttype,
- parg->name,
- sizeof(field) + parg->offset,
- parg->type->size,
- parg->type->is_signed,
- FILTER_OTHER);
- if (ret)
- return ret;
- }
- return 0;
+ return traceprobe_define_arg_fields(event_call, sizeof(field), &tk->tp);
}

#ifdef CONFIG_PERF_EVENTS
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index 8894b81e29b0..049e8531fdf8 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -680,3 +680,24 @@ int set_print_fmt(struct trace_probe *tp, bool is_return)

return 0;
}
+
+int traceprobe_define_arg_fields(struct trace_event_call *event_call,
+ size_t offset, struct trace_probe *tp)
+{
+ int ret, i;
+
+ /* Set argument names as fields */
+ for (i = 0; i < tp->nr_args; i++) {
+ struct probe_arg *parg = &tp->args[i];
+
+ ret = trace_define_field(event_call, parg->type->fmttype,
+ parg->name,
+ offset + parg->offset,
+ parg->type->size,
+ parg->type->is_signed,
+ FILTER_OTHER);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h
index 0c8e66f9c855..de928052926b 100644
--- a/kernel/trace/trace_probe.h
+++ b/kernel/trace/trace_probe.h
@@ -440,3 +440,5 @@ extern struct trace_event_call *
create_local_trace_uprobe(char *name, unsigned long offs, bool is_return);
extern void destroy_local_trace_uprobe(struct trace_event_call *event_call);
#endif
+extern int traceprobe_define_arg_fields(struct trace_event_call *event_call,
+ size_t offset, struct trace_probe *tp);
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 4c006a693663..887da2bb63aa 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -982,7 +982,7 @@ probe_event_disable(struct trace_uprobe *tu, struct trace_event_file *file)

static int uprobe_event_define_fields(struct trace_event_call *event_call)
{
- int ret, i, size;
+ int ret, size;
struct uprobe_trace_entry_head field;
struct trace_uprobe *tu = event_call->data;

@@ -994,19 +994,8 @@ static int uprobe_event_define_fields(struct trace_event_call *event_call)
DEFINE_FIELD(unsigned long, vaddr[0], FIELD_STRING_IP, 0);
size = SIZEOF_TRACE_ENTRY(false);
}
- /* Set argument names as fields */
- for (i = 0; i < tu->tp.nr_args; i++) {
- struct probe_arg *parg = &tu->tp.args[i];
-
- ret = trace_define_field(event_call, parg->type->fmttype,
- parg->name, size + parg->offset,
- parg->type->size, parg->type->is_signed,
- FILTER_OTHER);

- if (ret)
- return ret;
- }
- return 0;
+ return traceprobe_define_arg_fields(event_call, size, &tu->tp);
}

#ifdef CONFIG_PERF_EVENTS
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