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ftrace, perf: Add add/del tracepoint perf registration actions
Adding TRACE_REG_PERF_ADD and TRACE_REG_PERF_DEL to handle perf event schedule in/out actions. The add action is invoked for when the perf event is scheduled in, while the del action is invoked when the event is scheduled out. Link: http://lkml.kernel.org/r/1329317514-8131-4-git-send-email-jolsa@redhat.com Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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@ -148,6 +148,8 @@ enum trace_reg {
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TRACE_REG_PERF_UNREGISTER,
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TRACE_REG_PERF_OPEN,
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TRACE_REG_PERF_CLOSE,
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TRACE_REG_PERF_ADD,
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TRACE_REG_PERF_DEL,
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};
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struct ftrace_event_call;
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@ -211,12 +211,14 @@ int perf_trace_add(struct perf_event *p_event, int flags)
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list = this_cpu_ptr(pcpu_list);
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hlist_add_head_rcu(&p_event->hlist_entry, list);
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return 0;
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return tp_event->class->reg(tp_event, TRACE_REG_PERF_ADD, p_event);
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}
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void perf_trace_del(struct perf_event *p_event, int flags)
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{
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struct ftrace_event_call *tp_event = p_event->tp_event;
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hlist_del_rcu(&p_event->hlist_entry);
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tp_event->class->reg(tp_event, TRACE_REG_PERF_DEL, p_event);
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}
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__kprobes void *perf_trace_buf_prepare(int size, unsigned short type,
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@ -173,6 +173,8 @@ int ftrace_event_reg(struct ftrace_event_call *call,
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return 0;
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case TRACE_REG_PERF_OPEN:
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case TRACE_REG_PERF_CLOSE:
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case TRACE_REG_PERF_ADD:
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case TRACE_REG_PERF_DEL:
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return 0;
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#endif
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}
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@ -1912,6 +1912,8 @@ int kprobe_register(struct ftrace_event_call *event,
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return 0;
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case TRACE_REG_PERF_OPEN:
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case TRACE_REG_PERF_CLOSE:
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case TRACE_REG_PERF_ADD:
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case TRACE_REG_PERF_DEL:
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return 0;
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#endif
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}
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@ -666,6 +666,8 @@ static int syscall_enter_register(struct ftrace_event_call *event,
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return 0;
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case TRACE_REG_PERF_OPEN:
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case TRACE_REG_PERF_CLOSE:
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case TRACE_REG_PERF_ADD:
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case TRACE_REG_PERF_DEL:
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return 0;
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#endif
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}
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@ -690,6 +692,8 @@ static int syscall_exit_register(struct ftrace_event_call *event,
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return 0;
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case TRACE_REG_PERF_OPEN:
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case TRACE_REG_PERF_CLOSE:
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case TRACE_REG_PERF_ADD:
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case TRACE_REG_PERF_DEL:
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return 0;
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#endif
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}
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