From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>,
Frank Rowand <frowand.list@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Namhyung Kim <namhyung@kernel.org>, Tim Bird <Tim.Bird@sony.com>,
Jiri Olsa <jolsa@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Tom Zanussi <tom.zanussi@linux.intel.com>,
Rob Herring <robh+dt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [RFC PATCH v3 17/19] tracing/boot: Add function tracer filter options
Date: Mon, 26 Aug 2019 12:18:59 +0900 [thread overview]
Message-ID: <156678953942.21459.2531310402301118028.stgit@devnote2> (raw)
In-Reply-To: <156678933823.21459.4100380582025186209.stgit@devnote2>
Add below function-tracer filter options to boottime tracer.
- ftrace.[instance.INSTANCE.]ftrace.filters
This will take an array of tracing function filter rules
- ftrace.[instance.INSTANCE.]ftrace.notraces
This will take an array of NON-tracing function filter rules
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/trace_boot.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 755a2040aebf..942ca8d3fcc8 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -276,11 +276,51 @@ trace_boot_init_events(struct trace_array *tr, struct skc_node *node)
#define trace_boot_init_events(tr, node) do {} while (0)
#endif
+#ifdef CONFIG_FUNCTION_TRACER
+extern bool ftrace_filter_param __initdata;
+extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
+ int len, int reset);
+extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
+ int len, int reset);
+static void __init
+trace_boot_set_ftrace_filter(struct trace_array *tr, struct skc_node *node)
+{
+ struct skc_node *anode;
+ const char *p;
+ char *q;
+
+ skc_node_for_each_array_value(node, "ftrace.filters", anode, p) {
+ q = kstrdup(p, GFP_KERNEL);
+ if (!q)
+ return;
+ if (ftrace_set_filter(tr->ops, q, strlen(q), 0) < 0)
+ pr_err("Failed to add %s to ftrace filter\n", p);
+ else
+ ftrace_filter_param = true;
+ kfree(q);
+ }
+ skc_node_for_each_array_value(node, "ftrace.notraces", anode, p) {
+ q = kstrdup(p, GFP_KERNEL);
+ if (!q)
+ return;
+ if (ftrace_set_notrace(tr->ops, q, strlen(q), 0) < 0)
+ pr_err("Failed to add %s to ftrace filter\n", p);
+ else
+ ftrace_filter_param = true;
+ kfree(q);
+ }
+}
+#else
+#define trace_boot_set_ftrace_filter(tr, node) do {} while (0)
+#endif
+
static void __init
trace_boot_enable_tracer(struct trace_array *tr, struct skc_node *node)
{
const char *p;
+ trace_boot_set_ftrace_filter(tr, node);
+
p = skc_node_find_value(node, "tracer", NULL);
if (p && *p != '\0') {
if (tracing_set_tracer(tr, p) < 0)
next prev parent reply other threads:[~2019-08-26 3:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 3:15 [RFC PATCH v3 00/19] tracing: skc: Boot-time tracing and Supplemental Kernel Cmdline Masami Hiramatsu
2019-08-26 3:15 ` [RFC PATCH v3 01/19] skc: Add supplemental kernel cmdline support Masami Hiramatsu
2019-08-26 13:27 ` Rob Herring
2019-08-27 2:37 ` Masami Hiramatsu
2019-08-26 3:16 ` [RFC PATCH v3 02/19] skc: Add /proc/sup_cmdline to show SKC key-value list Masami Hiramatsu
2019-08-26 3:16 ` [RFC PATCH v3 03/19] skc: Add a boot setup routine from cmdline Masami Hiramatsu
2019-08-26 3:16 ` [RFC PATCH v3 04/19] Documentation: skc: Add a doc for supplemental kernel cmdline Masami Hiramatsu
2019-08-26 3:16 ` [RFC PATCH v3 05/19] tracing: Apply soft-disabled and filter to tracepoints printk Masami Hiramatsu
2019-08-26 3:16 ` [RFC PATCH v3 06/19] tracing: kprobes: Output kprobe event to printk buffer Masami Hiramatsu
2019-08-26 3:17 ` [RFC PATCH v3 07/19] tracing: Expose EXPORT_SYMBOL_GPL symbol Masami Hiramatsu
2019-08-26 3:17 ` [RFC PATCH v3 08/19] tracing: kprobes: Register to dynevent earlier stage Masami Hiramatsu
2019-08-26 3:17 ` [RFC PATCH v3 09/19] tracing: Accept different type for synthetic event fields Masami Hiramatsu
2019-08-26 3:17 ` [RFC PATCH v3 10/19] tracing: Add NULL trace-array check in print_synth_event() Masami Hiramatsu
2019-08-26 3:17 ` [RFC PATCH v3 11/19] tracing/boot: Add boot-time tracing by supplemental kernel cmdline Masami Hiramatsu
2019-08-26 3:18 ` [RFC PATCH v3 12/19] tracing/boot: Add per-event settings Masami Hiramatsu
2019-08-26 3:18 ` [RFC PATCH v3 13/19] tracing/boot Add kprobe event support Masami Hiramatsu
2019-08-26 3:18 ` [RFC PATCH v3 14/19] tracing/boot: Add synthetic " Masami Hiramatsu
2019-08-26 3:18 ` [RFC PATCH v3 15/19] tracing/boot: Add instance node support Masami Hiramatsu
2019-08-26 3:18 ` [RFC PATCH v3 16/19] tracing/boot: Add cpu_mask option support Masami Hiramatsu
2019-08-26 3:18 ` Masami Hiramatsu [this message]
2019-08-26 3:19 ` [RFC PATCH v3 18/19] tracing/boot: Add function-graph tracer options Masami Hiramatsu
2019-08-26 3:19 ` [RFC PATCH v3 19/19] Documentation: tracing: Add boot-time tracing document Masami Hiramatsu
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