From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A7DEC33C9E for ; Tue, 14 Jan 2020 21:03:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 245142468F for ; Tue, 14 Jan 2020 21:03:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729040AbgANVDo (ORCPT ); Tue, 14 Jan 2020 16:03:44 -0500 Received: from mail.kernel.org ([198.145.29.99]:51186 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729022AbgANVDm (ORCPT ); Tue, 14 Jan 2020 16:03:42 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5DD3724698; Tue, 14 Jan 2020 21:03:40 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.93) (envelope-from ) id 1irTLf-000DBW-A9; Tue, 14 Jan 2020 16:03:39 -0500 Message-Id: <20200114210339.194772148@goodmis.org> User-Agent: quilt/0.65 Date: Tue, 14 Jan 2020 16:03:40 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Masami Hiramatsu Subject: [for-next][PATCH 24/26] tracing/boot: Add function tracer filter options References: <20200114210316.450821675@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masami Hiramatsu 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 Link: http://lkml.kernel.org/r/157867244841.17873.10933616628243103561.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- 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 81d923c16a4d..fa9603dc6469 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_DYNAMIC_FTRACE +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) -- 2.24.1