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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>,
	Frank Rowand <frowand.list@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	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: [PATCH v5 21/22] tracing/boot: Add function tracer filter options
Date: Thu, 26 Dec 2019 23:08:03 +0900	[thread overview]
Message-ID: <157736928302.11126.8760178688093051786.stgit@devnote2> (raw)
In-Reply-To: <157736902773.11126.2531161235817081873.stgit@devnote2>

Add below function-tracer filter options to boot-time tracing.

 - 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>
---
 0 files changed

diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 81d923c16a4d..57274b9b3718 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -244,11 +244,51 @@ trace_boot_init_events(struct trace_array *tr, struct xbc_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 xbc_node *node)
+{
+	struct xbc_node *anode;
+	const char *p;
+	char *q;
+
+	xbc_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);
+	}
+	xbc_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 xbc_node *node)
 {
 	const char *p;
 
+	trace_boot_set_ftrace_filter(tr, node);
+
 	p = xbc_node_find_value(node, "tracer", NULL);
 	if (p && *p != '\0') {
 		if (tracing_set_tracer(tr, p) < 0)


  parent reply	other threads:[~2019-12-26 14:08 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-26 14:03 [PATCH v5 00/22] tracing: bootconfig: Boot-time tracing and Extra boot config Masami Hiramatsu
2019-12-26 14:04 ` [PATCH v5 01/22] bootconfig: Add Extra Boot Config support Masami Hiramatsu
2020-01-08  1:59   ` Steven Rostedt
2020-01-08  3:03     ` Steven Rostedt
2020-01-08  5:17     ` Masami Hiramatsu
2020-01-08 14:01       ` Steven Rostedt
2019-12-26 14:04 ` [PATCH v5 02/22] bootconfig: Load boot config from the tail of initrd Masami Hiramatsu
2019-12-26 14:04 ` [PATCH v5 03/22] tools: bootconfig: Add bootconfig command Masami Hiramatsu
2019-12-26 14:04 ` [PATCH v5 04/22] tools: bootconfig: Add bootconfig test script Masami Hiramatsu
2019-12-26 14:04 ` [PATCH v5 05/22] proc: bootconfig: Add /proc/bootconfig to show boot config list Masami Hiramatsu
2020-01-09 21:37   ` Steven Rostedt
2020-01-10  0:52     ` Masami Hiramatsu
2019-12-26 14:05 ` [PATCH v5 06/22] init/main.c: Alloc initcall_command_line in do_initcall() and free it Masami Hiramatsu
2019-12-26 14:05 ` [PATCH v5 07/22] bootconfig: init: Allow admin to use bootconfig for kernel command line Masami Hiramatsu
2019-12-26 14:05 ` [PATCH v5 08/22] bootconfig: init: Allow admin to use bootconfig for init " Masami Hiramatsu
2019-12-26 14:05 ` [PATCH v5 09/22] Documentation: bootconfig: Add a doc for extended boot config Masami Hiramatsu
2019-12-26 14:05 ` [PATCH v5 10/22] tracing: Apply soft-disabled and filter to tracepoints printk Masami Hiramatsu
2019-12-26 14:06 ` [PATCH v5 11/22] tracing: kprobes: Output kprobe event to printk buffer Masami Hiramatsu
2019-12-26 14:06 ` [PATCH v5 12/22] tracing: kprobes: Register to dynevent earlier stage Masami Hiramatsu
2019-12-26 14:06 ` [PATCH v5 13/22] tracing: Accept different type for synthetic event fields Masami Hiramatsu
2019-12-26 14:06 ` [PATCH v5 14/22] tracing: Add NULL trace-array check in print_synth_event() Masami Hiramatsu
2019-12-26 14:06 ` [PATCH v5 15/22] tracing/boot: Add boot-time tracing Masami Hiramatsu
2019-12-26 14:07 ` [PATCH v5 16/22] tracing/boot: Add per-event settings Masami Hiramatsu
2019-12-26 14:07 ` [PATCH v5 17/22] tracing/boot Add kprobe event support Masami Hiramatsu
2019-12-26 14:07 ` [PATCH v5 18/22] tracing/boot: Add synthetic " Masami Hiramatsu
2019-12-26 14:07 ` [PATCH v5 19/22] tracing/boot: Add instance node support Masami Hiramatsu
2019-12-26 14:07 ` [PATCH v5 20/22] tracing/boot: Add cpu_mask option support Masami Hiramatsu
2019-12-26 14:08 ` Masami Hiramatsu [this message]
2019-12-26 18:05   ` [PATCH v5 21/22] tracing/boot: Add function tracer filter options kbuild test robot
2019-12-26 18:05     ` kbuild test robot
2019-12-27  2:56     ` Masami Hiramatsu
2019-12-27  2:56       ` Masami Hiramatsu
2019-12-26 14:08 ` [PATCH v5 22/22] Documentation: tracing: Add boot-time tracing document Masami Hiramatsu
2020-01-09 23:10 ` [PATCH v5 00/22] tracing: bootconfig: Boot-time tracing and Extra boot config Steven Rostedt
2020-01-10 15:30   ` Masami Hiramatsu

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