summaryrefslogtreecommitdiff
path: root/kernel/trace/trace_dynevent.c
diff options
context:
space:
mode:
authorLinyu Yuan <quic_linyyuan@quicinc.com>2022-06-27 10:19:07 +0800
committerSteven Rostedt (Google) <rostedt@goodmis.org>2022-07-24 19:11:17 -0400
commit95c104c378dc7d4cb3fb9f289dc5354bfc285fe0 (patch)
tree0d2657d250a3e22ab08e4250f34db9adc2d50650 /kernel/trace/trace_dynevent.c
parentf360ea5641dc9473ad485e882c8ac3b1aa2672ff (diff)
tracing: Auto generate event name when creating a group of events
Currently when creating a specific group of trace events, take kprobe event as example, the user must use the following format: p:GRP/EVENT [MOD:]KSYM[+OFFS]|KADDR [FETCHARGS], which means user must enter EVENT name, one example is: echo 'p:usb_gadget/config_usb_cfg_link config_usb_cfg_link $arg1' >> kprobe_events It is not simple if there are too many entries because the event name is the same as symbol name. This change allows user to specify no EVENT name, format changed as: p:GRP/ [MOD:]KSYM[+OFFS]|KADDR [FETCHARGS] It will generate event name automatically and one example is: echo 'p:usb_gadget/ config_usb_cfg_link $arg1' >> kprobe_events. Link: https://lore.kernel.org/all/1656296348-16111-4-git-send-email-quic_linyyuan@quicinc.com/ Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Tom Zanussi <zanussi@kernel.org> Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_dynevent.c')
-rw-r--r--kernel/trace/trace_dynevent.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_dynevent.c b/kernel/trace/trace_dynevent.c
index 076b447a1b88..154996684fb5 100644
--- a/kernel/trace/trace_dynevent.c
+++ b/kernel/trace/trace_dynevent.c
@@ -101,7 +101,7 @@ int dyn_event_release(const char *raw_command, struct dyn_event_operations *type
event = p + 1;
*p = '\0';
}
- if (event[0] == '\0') {
+ if (!system && event[0] == '\0') {
ret = -EINVAL;
goto out;
}