tracing: Add trace options for core options to instances
Allow instances to have their own options, at least for the core options (non tracer specific ones). There are a few global options that should not be added to instances, like enabling of trace_printk, and the sched comm recording, which do not have a specific trace instance associated to them. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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2d34f48955
Коммит
16270145ce
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@ -258,6 +258,11 @@ unsigned long long ns2usecs(cycle_t nsec)
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TRACE_ITER_RECORD_CMD | TRACE_ITER_OVERWRITE | \
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TRACE_ITER_IRQ_INFO | TRACE_ITER_MARKERS)
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/* trace_options that are only supported by global_trace */
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#define TOP_LEVEL_TRACE_FLAGS (TRACE_ITER_PRINTK | \
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TRACE_ITER_PRINTK_MSGONLY | TRACE_ITER_RECORD_CMD)
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/*
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* The global_trace is the descriptor that holds the tracing
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* buffers for the live tracing. For each CPU, it contains
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@ -6387,18 +6392,22 @@ create_trace_option_core_file(struct trace_array *tr,
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&trace_options_core_fops);
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}
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static __init void create_trace_options_dir(struct trace_array *tr)
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static void create_trace_options_dir(struct trace_array *tr)
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{
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struct dentry *t_options;
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bool top_level = tr == &global_trace;
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int i;
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t_options = trace_options_init_dentry(tr);
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if (!t_options)
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return;
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for (i = 0; trace_options[i]; i++)
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for (i = 0; trace_options[i]; i++) {
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if (top_level ||
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!((1 << i) & TOP_LEVEL_TRACE_FLAGS))
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create_trace_option_core_file(tr, trace_options[i], i);
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}
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}
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static ssize_t
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rb_simple_read(struct file *filp, char __user *ubuf,
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@ -6707,6 +6716,8 @@ init_tracer_tracefs(struct trace_array *tr, struct dentry *d_tracer)
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trace_create_file("tracing_on", 0644, d_tracer,
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tr, &rb_simple_fops);
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create_trace_options_dir(tr);
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#ifdef CONFIG_TRACER_MAX_TRACE
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trace_create_file("tracing_max_latency", 0644, d_tracer,
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&tr->max_latency, &tracing_max_lat_fops);
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@ -6903,8 +6914,6 @@ static __init int tracer_init_tracefs(void)
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create_trace_instances(d_tracer);
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create_trace_options_dir(&global_trace);
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mutex_lock(&trace_types_lock);
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for (t = trace_types; t; t = t->next)
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add_tracer_options(&global_trace, t);
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