From c4a5923055c9e0c87dfc0387f7cda5ee2bbac3c1 Mon Sep 17 00:00:00 2001 From: Tom Zanussi Date: Thu, 10 Dec 2015 12:50:45 -0600 Subject: [PATCH] tracing: Add event record param to trigger_ops.func() Some triggers may need access to the trace event, so pass it in. Also fix up the existing trigger funcs and their callers. Link: http://lkml.kernel.org/r/543e31e9fc445ef61077421ab219033401c39846.1449767187.git.tom.zanussi@linux.intel.com Signed-off-by: Tom Zanussi Tested-by: Masami Hiramatsu Reviewed-by: Namhyung Kim Signed-off-by: Steven Rostedt --- include/linux/trace_events.h | 7 +++--- kernel/trace/trace.h | 6 +++-- kernel/trace/trace_events_trigger.c | 36 +++++++++++++++-------------- 3 files changed, 27 insertions(+), 22 deletions(-) diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index 925730bc9fc1..0d6930e941e8 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -430,7 +430,8 @@ extern int call_filter_check_discard(struct trace_event_call *call, void *rec, extern enum event_trigger_type event_triggers_call(struct trace_event_file *file, void *rec); extern void event_triggers_post_call(struct trace_event_file *file, - enum event_trigger_type tt); + enum event_trigger_type tt, + void *rec); bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); @@ -517,7 +518,7 @@ event_trigger_unlock_commit(struct trace_event_file *file, trace_buffer_unlock_commit(file->tr, buffer, event, irq_flags, pc); if (tt) - event_triggers_post_call(file, tt); + event_triggers_post_call(file, tt, entry); } /** @@ -550,7 +551,7 @@ event_trigger_unlock_commit_regs(struct trace_event_file *file, irq_flags, pc, regs); if (tt) - event_triggers_post_call(file, tt); + event_triggers_post_call(file, tt, entry); } #ifdef CONFIG_BPF_EVENTS diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index b2bc956e2b0d..c10456e72106 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1201,7 +1201,8 @@ extern int register_event_command(struct event_command *cmd); * @func: 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). + * registered the trigger (see struct event_command) along with + * the trace record, rec. * * @init: An optional initialization function called for the trigger * when the trigger is registered (via the event_command reg() @@ -1226,7 +1227,8 @@ extern int register_event_command(struct event_command *cmd); * (see trace_event_triggers.c). */ struct event_trigger_ops { - void (*func)(struct event_trigger_data *data); + void (*func)(struct event_trigger_data *data, + void *rec); 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_events_trigger.c b/kernel/trace/trace_events_trigger.c index f40424f35dcb..0a62887c63c0 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -73,7 +73,7 @@ event_triggers_call(struct trace_event_file *file, void *rec) list_for_each_entry_rcu(data, &file->triggers, list) { if (!rec) { - data->ops->func(data); + data->ops->func(data, rec); continue; } filter = rcu_dereference_sched(data->filter); @@ -83,7 +83,7 @@ event_triggers_call(struct trace_event_file *file, void *rec) tt |= data->cmd_ops->trigger_type; continue; } - data->ops->func(data); + data->ops->func(data, rec); } return tt; } @@ -93,6 +93,7 @@ EXPORT_SYMBOL_GPL(event_triggers_call); * event_triggers_post_call - Call 'post_triggers' for a trace event * @file: The trace_event_file associated with the event * @tt: enum event_trigger_type containing a set bit for each trigger to invoke + * @rec: The trace entry for the event * * For each trigger associated with an event, invoke the trigger * function registered with the associated trigger command, if the @@ -103,13 +104,14 @@ EXPORT_SYMBOL_GPL(event_triggers_call); */ void event_triggers_post_call(struct trace_event_file *file, - enum event_trigger_type tt) + enum event_trigger_type tt, + void *rec) { struct event_trigger_data *data; list_for_each_entry_rcu(data, &file->triggers, list) { if (data->cmd_ops->trigger_type & tt) - data->ops->func(data); + data->ops->func(data, rec); } } EXPORT_SYMBOL_GPL(event_triggers_post_call); @@ -745,7 +747,7 @@ int set_trigger_filter(char *filter_str, } static void -traceon_trigger(struct event_trigger_data *data) +traceon_trigger(struct event_trigger_data *data, void *rec) { if (tracing_is_on()) return; @@ -754,7 +756,7 @@ traceon_trigger(struct event_trigger_data *data) } static void -traceon_count_trigger(struct event_trigger_data *data) +traceon_count_trigger(struct event_trigger_data *data, void *rec) { if (tracing_is_on()) return; @@ -769,7 +771,7 @@ traceon_count_trigger(struct event_trigger_data *data) } static void -traceoff_trigger(struct event_trigger_data *data) +traceoff_trigger(struct event_trigger_data *data, void *rec) { if (!tracing_is_on()) return; @@ -778,7 +780,7 @@ traceoff_trigger(struct event_trigger_data *data) } static void -traceoff_count_trigger(struct event_trigger_data *data) +traceoff_count_trigger(struct event_trigger_data *data, void *rec) { if (!tracing_is_on()) return; @@ -874,13 +876,13 @@ static struct event_command trigger_traceoff_cmd = { #ifdef CONFIG_TRACER_SNAPSHOT static void -snapshot_trigger(struct event_trigger_data *data) +snapshot_trigger(struct event_trigger_data *data, void *rec) { tracing_snapshot(); } static void -snapshot_count_trigger(struct event_trigger_data *data) +snapshot_count_trigger(struct event_trigger_data *data, void *rec) { if (!data->count) return; @@ -888,7 +890,7 @@ snapshot_count_trigger(struct event_trigger_data *data) if (data->count != -1) (data->count)--; - snapshot_trigger(data); + snapshot_trigger(data, rec); } static int @@ -967,13 +969,13 @@ static __init int register_trigger_snapshot_cmd(void) { return 0; } #define STACK_SKIP 3 static void -stacktrace_trigger(struct event_trigger_data *data) +stacktrace_trigger(struct event_trigger_data *data, void *rec) { trace_dump_stack(STACK_SKIP); } static void -stacktrace_count_trigger(struct event_trigger_data *data) +stacktrace_count_trigger(struct event_trigger_data *data, void *rec) { if (!data->count) return; @@ -981,7 +983,7 @@ stacktrace_count_trigger(struct event_trigger_data *data) if (data->count != -1) (data->count)--; - stacktrace_trigger(data); + stacktrace_trigger(data, rec); } static int @@ -1052,7 +1054,7 @@ struct enable_trigger_data { }; static void -event_enable_trigger(struct event_trigger_data *data) +event_enable_trigger(struct event_trigger_data *data, void *rec) { struct enable_trigger_data *enable_data = data->private_data; @@ -1063,7 +1065,7 @@ event_enable_trigger(struct event_trigger_data *data) } static void -event_enable_count_trigger(struct event_trigger_data *data) +event_enable_count_trigger(struct event_trigger_data *data, void *rec) { struct enable_trigger_data *enable_data = data->private_data; @@ -1077,7 +1079,7 @@ event_enable_count_trigger(struct event_trigger_data *data) if (data->count != -1) (data->count)--; - event_enable_trigger(data); + event_enable_trigger(data, rec); } static int -- 2.20.1