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tracing: Allow NOT to filter AND and OR clauses 

Add support to allow not "!" for and (&&) and (||). That is:

 !(field1 == X && field2 == Y)

Where the value of the full clause will be notted.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2014-12-02 19:08:30 -05:00 committed by Steven Rostedt
parent e12c09cf30
commit eabb8980a9
1 changed files with 5 additions and 4 deletions
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9
kernel/trace/trace_events_filter.c
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@ -489,9 +489,10 @@ static int process_ops(struct filter_pred *preds,
if (!WARN_ON_ONCE(!pred->fn))
match = pred->fn(pred, rec);
if (!!match == type)
return match;
break;
}
return match;
/* If not of not match is equal to not of not, then it is a match */
return !!match == !op->not;
}
struct filter_match_preds_data {
@ -740,10 +741,10 @@ static int filter_set_pred(struct event_filter *filter,
* then this op can be folded.
*/
if (left->index & FILTER_PRED_FOLD &&
(left->op == dest->op ||
((left->op == dest->op && !left->not) ||
left->left == FILTER_PRED_INVALID) &&
right->index & FILTER_PRED_FOLD &&
(right->op == dest->op ||
((right->op == dest->op && !right->not) ||
right->left == FILTER_PRED_INVALID))
dest->index |= FILTER_PRED_FOLD;