From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Tom Zanussi <zanussi@kernel.org>
Subject: [for-next][PATCH 09/11] tracing: Change event_trigger_ops func() to trigger()
Date: Sat, 11 Dec 2021 20:26:26 -0500 [thread overview]
Message-ID: <20211212012646.231390067@goodmis.org> (raw)
In-Reply-To: 20211212012617.690710310@goodmis.org
From: Tom Zanussi <zanussi@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.
Link: https://lkml.kernel.org/r/36ab812e3ee74ee03ae0043fda41a858ee728c00.1639170140.git.zanussi@kernel.org
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
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 3b2b1bfc686f..13f23082f256 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,
--
2.33.0
next prev parent reply other threads:[~2021-12-12 1:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-12 1:26 [for-next][PATCH 00/11] tracing: More updates for 5.17 Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 01/11] tracing: Make trace_marker{,_raw} stream-like Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 02/11] script/sorttable: Code style improvements Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 03/11] tracefs: Use d_inode() helper function to get the dentry inode Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 04/11] tracing: Iterate trace_[ku]probe objects directly Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 05/11] tracing: Do not let synth_events block other dyn_event systems during create Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 06/11] tracing: Use memset_startat helper in trace_iterator_reset() Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 07/11] tracing: Use trace_iterator_reset() in tracing_read_pipe() Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 08/11] tracing: Change event_command func() to parse() Steven Rostedt
2021-12-12 1:26 ` Steven Rostedt [this message]
2021-12-12 1:26 ` [for-next][PATCH 10/11] tracing: Add helper functions to simplify event_command.parse() callback handling Steven Rostedt
2021-12-12 1:26 ` [for-next][PATCH 11/11] tracing: Have existing event_command.parse() implementations use helpers Steven Rostedt
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