From 30199137c899d7e416a2adc58bf09bec217ce9ca Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Thu, 20 Jun 2019 00:07:39 +0900 Subject: [PATCH] tracing/dynevent: Pass extra arguments to match operation Pass extra arguments to match operation for checking exact match. If the event doesn't support exact match, it will be ignored. Link: http://lkml.kernel.org/r/156095685930.28024.10405547027475590975.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace_dynevent.c | 4 +++- kernel/trace/trace_dynevent.h | 7 ++++--- kernel/trace/trace_events_hist.c | 4 ++-- kernel/trace/trace_kprobe.c | 4 ++-- kernel/trace/trace_uprobe.c | 4 ++-- 5 files changed, 13 insertions(+), 10 deletions(-) diff --git a/kernel/trace/trace_dynevent.c b/kernel/trace/trace_dynevent.c index 1cc55c5..a41fed4 100644 --- a/kernel/trace/trace_dynevent.c +++ b/kernel/trace/trace_dynevent.c @@ -47,6 +47,7 @@ int dyn_event_release(int argc, char **argv, struct dyn_event_operations *type) return -EINVAL; event++; } + argc--; argv++; p = strchr(event, '/'); if (p) { @@ -61,7 +62,8 @@ int dyn_event_release(int argc, char **argv, struct dyn_event_operations *type) for_each_dyn_event_safe(pos, n) { if (type && type != pos->ops) continue; - if (!pos->ops->match(system, event, pos)) + if (!pos->ops->match(system, event, + argc, (const char **)argv, pos)) continue; ret = pos->ops->free(pos); diff --git a/kernel/trace/trace_dynevent.h b/kernel/trace/trace_dynevent.h index 8c33406..4689813 100644 --- a/kernel/trace/trace_dynevent.h +++ b/kernel/trace/trace_dynevent.h @@ -31,8 +31,9 @@ struct dyn_event; * @is_busy: Check whether given event is busy so that it can not be deleted. * Return true if it is busy, otherwides false. * @free: Delete the given event. Return 0 if success, otherwides error. - * @match: Check whether given event and system name match this event. - * Return true if it matches, otherwides false. + * @match: Check whether given event and system name match this event. The argc + * and argv is used for exact match. Return true if it matches, otherwides + * false. * * Except for @create, these methods are called under holding event_mutex. */ @@ -43,7 +44,7 @@ struct dyn_event_operations { bool (*is_busy)(struct dyn_event *ev); int (*free)(struct dyn_event *ev); bool (*match)(const char *system, const char *event, - struct dyn_event *ev); + int argc, const char **argv, struct dyn_event *ev); }; /* Register new dyn_event type -- must be called at first */ diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index ca6b0df..65e7d07 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -374,7 +374,7 @@ static int synth_event_show(struct seq_file *m, struct dyn_event *ev); static int synth_event_release(struct dyn_event *ev); static bool synth_event_is_busy(struct dyn_event *ev); static bool synth_event_match(const char *system, const char *event, - struct dyn_event *ev); + int argc, const char **argv, struct dyn_event *ev); static struct dyn_event_operations synth_event_ops = { .create = synth_event_create, @@ -422,7 +422,7 @@ static bool synth_event_is_busy(struct dyn_event *ev) } static bool synth_event_match(const char *system, const char *event, - struct dyn_event *ev) + int argc, const char **argv, struct dyn_event *ev) { struct synth_event *sev = to_synth_event(ev); diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index eac6344..e8f7243 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -39,7 +39,7 @@ static int trace_kprobe_show(struct seq_file *m, struct dyn_event *ev); static int trace_kprobe_release(struct dyn_event *ev); static bool trace_kprobe_is_busy(struct dyn_event *ev); static bool trace_kprobe_match(const char *system, const char *event, - struct dyn_event *ev); + int argc, const char **argv, struct dyn_event *ev); static struct dyn_event_operations trace_kprobe_ops = { .create = trace_kprobe_create, @@ -138,7 +138,7 @@ static bool trace_kprobe_is_busy(struct dyn_event *ev) } static bool trace_kprobe_match(const char *system, const char *event, - struct dyn_event *ev) + int argc, const char **argv, struct dyn_event *ev) { struct trace_kprobe *tk = to_trace_kprobe(ev); diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index ac799ab..2862e68 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -44,7 +44,7 @@ static int trace_uprobe_show(struct seq_file *m, struct dyn_event *ev); static int trace_uprobe_release(struct dyn_event *ev); static bool trace_uprobe_is_busy(struct dyn_event *ev); static bool trace_uprobe_match(const char *system, const char *event, - struct dyn_event *ev); + int argc, const char **argv, struct dyn_event *ev); static struct dyn_event_operations trace_uprobe_ops = { .create = trace_uprobe_create, @@ -285,7 +285,7 @@ static bool trace_uprobe_is_busy(struct dyn_event *ev) } static bool trace_uprobe_match(const char *system, const char *event, - struct dyn_event *ev) + int argc, const char **argv, struct dyn_event *ev) { struct trace_uprobe *tu = to_trace_uprobe(ev); -- 2.7.4