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tracing/filters: move preds into event_filter object

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Create a new event_filter object, and move the pred-related members
out of the call and subsystem objects and into the filter object - the
details of the filter implementation don't need to be exposed in the
call and subsystem in any case, and it will also help make the new
parser implementation a little cleaner.

[ Impact: refactor trace-filter code to prepare for new features ]

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: fweisbec@gmail.com
Cc: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <1240905887.6416.119.camel@tropicana>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tom Zanussi
2009-04-28 03:04:47 -05:00
committed by Ingo Molnar
parent 0f9a623dd6
commit 30e673b230
4 changed files with 76 additions and 48 deletions
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10
kernel/trace/trace.h
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@@ -731,12 +731,16 @@ struct ftrace_event_field {
int size;
};
struct event_filter {
int n_preds;
struct filter_pred **preds;
};
struct event_subsystem {
struct list_head list;
const char *name;
struct dentry *entry;
int n_preds;
struct filter_pred **preds;
void *filter;
};
struct filter_pred;
@@ -774,7 +778,7 @@ filter_check_discard(struct ftrace_event_call *call, void *rec,
struct ring_buffer *buffer,
struct ring_buffer_event *event)
{
if (unlikely(call->n_preds) && !filter_match_preds(call, rec)) {
if (unlikely(call->filter_active) && !filter_match_preds(call, rec)) {
ring_buffer_discard_commit(buffer, event);
return 1;
}