Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CAF82C433F5 for ; Mon, 10 Jan 2022 00:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237533AbiAJAEY (ORCPT ); Sun, 9 Jan 2022 19:04:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237499AbiAJAEU (ORCPT ); Sun, 9 Jan 2022 19:04:20 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF21DC06173F for ; Sun, 9 Jan 2022 16:04:20 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 41B1E60FD9 for ; Mon, 10 Jan 2022 00:04:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19D52C36AE3; Mon, 10 Jan 2022 00:04:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1641773059; bh=yE2q+xnkfSNyw3eRPs9WaUSPN7vUF0dmIhBs7LZbHFg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=HPLUGRuHZ44FN+TDjQ3/DIyfxdIKOfJ+l8wxuXUL6YPAhJqZMmSMCzp5m43RuMFOP KpR93Z/NXSrLh7knIPdiWh21WAPqCYG5Kf0LVZqu8uuR0iF6/ndGZxs7MzGNaq3iX1 FSHo19nmxKLCApS9c0fU5V9uvGfXJ4WfAVO5BIm1511nKJ1ein/5mBXD39aFs58oN2 Xtj8uJF+IRSVhHz9+yTK57hHcXo6m/PSvTaxUQlFtO2eQCqevIGr9kUIL87LcgRER7 KN6LgwgUVTlSL4ZE9Tk+dNT/qyCnP+Z6dmlMMxEHZR7XEogbnJr6FrqzS3KIXD3eMF JsT/zwJaJbwzQ== From: Tom Zanussi To: rostedt@goodmis.org Cc: mhiramat@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 2/6] tracing: Change event_trigger_ops func() to trigger() Date: Sun, 9 Jan 2022 18:04:06 -0600 Message-Id: <36ab812e3ee74ee03ae0043fda41a858ee728c00.1641772260.git.zanussi@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The name of the func() callback on event_trigger_ops is too generic and is easily confused with other callbacks with that name, so change it to something that reflects its actual purpose. In this case, the main purpose of the callback is to implement an event trigger, so call it trigger() instead. Also add some more documentation to event_trigger_ops describing the callbacks a bit better. Signed-off-by: Tom Zanussi --- kernel/trace/trace.h | 19 ++++++++++++++---- kernel/trace/trace_eprobe.c | 2 +- kernel/trace/trace_events_hist.c | 12 ++++++------ kernel/trace/trace_events_trigger.c | 30 ++++++++++++++--------------- 4 files changed, 37 insertions(+), 26 deletions(-) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 25bd5706ef0b..1a73659222d4 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1619,10 +1619,20 @@ extern int register_trigger_hist_enable_disable_cmds(void); * The methods in this structure provide per-event trigger hooks for * various trigger operations. * + * The @init and @free methods are used during trigger setup and + * teardown, typically called from an event_command's @parse() + * function implementation. + * + * The @print method is used to print the trigger spec. + * + * The @trigger method is the function that actually implements the + * trigger and is called in the context of the triggering event + * whenever that event occurs. + * * All the methods below, except for @init() and @free(), must be * implemented. * - * @func: The trigger 'probe' function called when the triggering + * @trigger: The trigger 'probe' function called when the triggering * event occurs. The data passed into this callback is the data * that was supplied to the event_command @reg() function that * registered the trigger (see struct event_command) along with @@ -1651,9 +1661,10 @@ extern int register_trigger_hist_enable_disable_cmds(void); * (see trace_event_triggers.c). */ struct event_trigger_ops { - void (*func)(struct event_trigger_data *data, - struct trace_buffer *buffer, void *rec, - struct ring_buffer_event *rbe); + void (*trigger)(struct event_trigger_data *data, + struct trace_buffer *buffer, + void *rec, + struct ring_buffer_event *rbe); int (*init)(struct event_trigger_ops *ops, struct event_trigger_data *data); void (*free)(struct event_trigger_ops *ops, diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c index 84d5bfa34a99..6d363fd8a1e4 100644 --- a/kernel/trace/trace_eprobe.c +++ b/kernel/trace/trace_eprobe.c @@ -543,7 +543,7 @@ static void eprobe_trigger_func(struct event_trigger_data *data, } static struct event_trigger_ops eprobe_trigger_ops = { - .func = eprobe_trigger_func, + .trigger = eprobe_trigger_func, .print = eprobe_trigger_print, .init = eprobe_trigger_init, .free = eprobe_trigger_free, diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 89bbbbd3a3f5..229ce5c2dfd3 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -5759,7 +5759,7 @@ static void event_hist_trigger_free(struct event_trigger_ops *ops, } static struct event_trigger_ops event_hist_trigger_ops = { - .func = event_hist_trigger, + .trigger = event_hist_trigger, .print = event_hist_trigger_print, .init = event_hist_trigger_init, .free = event_hist_trigger_free, @@ -5793,7 +5793,7 @@ static void event_hist_trigger_named_free(struct event_trigger_ops *ops, } static struct event_trigger_ops event_hist_trigger_named_ops = { - .func = event_hist_trigger, + .trigger = event_hist_trigger, .print = event_hist_trigger_print, .init = event_hist_trigger_named_init, .free = event_hist_trigger_named_free, @@ -6383,28 +6383,28 @@ hist_enable_count_trigger(struct event_trigger_data *data, } static struct event_trigger_ops hist_enable_trigger_ops = { - .func = hist_enable_trigger, + .trigger = hist_enable_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops hist_enable_count_trigger_ops = { - .func = hist_enable_count_trigger, + .trigger = hist_enable_count_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops hist_disable_trigger_ops = { - .func = hist_enable_trigger, + .trigger = hist_enable_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops hist_disable_count_trigger_ops = { - .func = hist_enable_count_trigger, + .trigger = hist_enable_count_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index 15aae07cbe61..24aceeb50dc0 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -68,7 +68,7 @@ event_triggers_call(struct trace_event_file *file, if (data->paused) continue; if (!rec) { - data->ops->func(data, buffer, rec, event); + data->ops->trigger(data, buffer, rec, event); continue; } filter = rcu_dereference_sched(data->filter); @@ -78,7 +78,7 @@ event_triggers_call(struct trace_event_file *file, tt |= data->cmd_ops->trigger_type; continue; } - data->ops->func(data, buffer, rec, event); + data->ops->trigger(data, buffer, rec, event); } return tt; } @@ -106,7 +106,7 @@ event_triggers_post_call(struct trace_event_file *file, if (data->paused) continue; if (data->cmd_ops->trigger_type & tt) - data->ops->func(data, NULL, NULL, NULL); + data->ops->trigger(data, NULL, NULL, NULL); } } EXPORT_SYMBOL_GPL(event_triggers_post_call); @@ -1023,28 +1023,28 @@ traceoff_trigger_print(struct seq_file *m, struct event_trigger_ops *ops, } static struct event_trigger_ops traceon_trigger_ops = { - .func = traceon_trigger, + .trigger = traceon_trigger, .print = traceon_trigger_print, .init = event_trigger_init, .free = event_trigger_free, }; static struct event_trigger_ops traceon_count_trigger_ops = { - .func = traceon_count_trigger, + .trigger = traceon_count_trigger, .print = traceon_trigger_print, .init = event_trigger_init, .free = event_trigger_free, }; static struct event_trigger_ops traceoff_trigger_ops = { - .func = traceoff_trigger, + .trigger = traceoff_trigger, .print = traceoff_trigger_print, .init = event_trigger_init, .free = event_trigger_free, }; static struct event_trigger_ops traceoff_count_trigger_ops = { - .func = traceoff_count_trigger, + .trigger = traceoff_count_trigger, .print = traceoff_trigger_print, .init = event_trigger_init, .free = event_trigger_free, @@ -1135,14 +1135,14 @@ snapshot_trigger_print(struct seq_file *m, struct event_trigger_ops *ops, } static struct event_trigger_ops snapshot_trigger_ops = { - .func = snapshot_trigger, + .trigger = snapshot_trigger, .print = snapshot_trigger_print, .init = event_trigger_init, .free = event_trigger_free, }; static struct event_trigger_ops snapshot_count_trigger_ops = { - .func = snapshot_count_trigger, + .trigger = snapshot_count_trigger, .print = snapshot_trigger_print, .init = event_trigger_init, .free = event_trigger_free, @@ -1226,14 +1226,14 @@ stacktrace_trigger_print(struct seq_file *m, struct event_trigger_ops *ops, } static struct event_trigger_ops stacktrace_trigger_ops = { - .func = stacktrace_trigger, + .trigger = stacktrace_trigger, .print = stacktrace_trigger_print, .init = event_trigger_init, .free = event_trigger_free, }; static struct event_trigger_ops stacktrace_count_trigger_ops = { - .func = stacktrace_count_trigger, + .trigger = stacktrace_count_trigger, .print = stacktrace_trigger_print, .init = event_trigger_init, .free = event_trigger_free, @@ -1353,28 +1353,28 @@ void event_enable_trigger_free(struct event_trigger_ops *ops, } static struct event_trigger_ops event_enable_trigger_ops = { - .func = event_enable_trigger, + .trigger = event_enable_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops event_enable_count_trigger_ops = { - .func = event_enable_count_trigger, + .trigger = event_enable_count_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops event_disable_trigger_ops = { - .func = event_enable_trigger, + .trigger = event_enable_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops event_disable_count_trigger_ops = { - .func = event_enable_count_trigger, + .trigger = event_enable_count_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, -- 2.17.1