From 44e9c8b7adc52079f0535f9de0c2c2477831389b Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Sat, 11 Apr 2009 15:55:28 +0800 Subject: [PATCH] tracing/filters: return proper error code when writing filter file - propagate return value of filter_add_pred() to the user - return -ENOSPC but not -ENOMEM or -EINVAL when the filter array is full Signed-off-by: Li Zefan Acked-by: Tom Zanussi Acked-by: Frederic Weisbecker Cc: Steven Rostedt LKML-Reference: <49E04CF0.3010105@cn.fujitsu.com> Signed-off-by: Ingo Molnar --- kernel/trace/trace_events.c | 10 ++++++---- kernel/trace/trace_events_filter.c | 4 ++-- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 054bc1802bcd..576f4fa2af0d 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -521,9 +521,10 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, return cnt; } - if (filter_add_pred(call, pred)) { + err = filter_add_pred(call, pred); + if (err < 0) { filter_free_pred(pred); - return -EINVAL; + return err; } *ppos += cnt; @@ -588,10 +589,11 @@ subsystem_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, return cnt; } - if (filter_add_subsystem_pred(system, pred)) { + err = filter_add_subsystem_pred(system, pred); + if (err < 0) { filter_free_subsystem_preds(system); filter_free_pred(pred); - return -EINVAL; + return err; } *ppos += cnt; diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 49b3ef54ec46..e03cbf1e38f3 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -215,7 +215,7 @@ static int __filter_add_pred(struct ftrace_event_call *call, } } - return -ENOMEM; + return -ENOSPC; } static int is_string_field(const char *type) @@ -319,7 +319,7 @@ int filter_add_subsystem_pred(struct event_subsystem *system, } if (i == MAX_FILTER_PRED) - return -EINVAL; + return -ENOSPC; events_for_each(call) { int err;