From patchwork Fri Jul 30 22:18:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 490011 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8DB1C19F37 for ; Fri, 30 Jul 2021 22:18:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F1F2610CD for ; Fri, 30 Jul 2021 22:18:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232140AbhG3WSw (ORCPT ); Fri, 30 Jul 2021 18:18:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:51316 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233099AbhG3WSk (ORCPT ); Fri, 30 Jul 2021 18:18:40 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C59956109F; Fri, 30 Jul 2021 22:18:34 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.94.2) (envelope-from ) id 1m9apt-002V1n-OY; Fri, 30 Jul 2021 18:18:33 -0400 From: Steven Rostedt To: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Tom Zanussi , Daniel Bristot de Oliveira , Masami Hiramatsu , Namhyung Kim , linux-rt-users , Clark Williams , "Steven Rostedt (VMware)" Subject: [PATCH 15/17] libtracefs: Add error message for grouping events in SQL filter Date: Fri, 30 Jul 2021 18:18:22 -0400 Message-Id: <20210730221824.595597-16-rostedt@goodmis.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210730221824.595597-1-rostedt@goodmis.org> References: <20210730221824.595597-1-rostedt@goodmis.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org From: "Steven Rostedt (VMware)" One requirement for the SQL filter in tracefs_sql() is that the WHERE clause (filter) can only filter the FROM and JOIN events with "&&". That is, you can not have: sched_switch.next_pid == 0 || sched_waking.pid == 0 As the filtering one event stops the synthetic event, having an || conjunction makes no sense. Add an error message that explains this when it is found. Signed-off-by: Steven Rostedt (VMware) --- src/tracefs-sqlhist.c | 35 +++++++++++++++++++++++++---------- 1 file changed, 25 insertions(+), 10 deletions(-) diff --git a/src/tracefs-sqlhist.c b/src/tracefs-sqlhist.c index ff0869232a9e..1767c33d77d0 100644 --- a/src/tracefs-sqlhist.c +++ b/src/tracefs-sqlhist.c @@ -715,21 +715,36 @@ static int build_compare(struct tracefs_synth *synth, return ret; } -static int do_verify_filter(struct filter *filter, +static int verify_filter_error(struct sqlhist_bison *sb, struct expr *expr, + const char *event) +{ + struct field *field = &expr->field; + + sb->line_no = expr->line; + sb->line_idx = expr->idx; + + parse_error(sb, field->raw, + "event '%s' can not be grouped or '||' together with '%s'\n" + "All filters between '&&' must be for the same event\n", + field->event, event); + return -1; +} + +static int do_verify_filter(struct sqlhist_bison *sb, struct filter *filter, const char **system, const char **event) { int ret; if (filter->type == FILTER_OR || filter->type == FILTER_AND) { - ret = do_verify_filter(&filter->lval->filter, system, event); + ret = do_verify_filter(sb, &filter->lval->filter, system, event); if (ret) return ret; - return do_verify_filter(&filter->rval->filter, system, event); + return do_verify_filter(sb, &filter->rval->filter, system, event); } if (filter->type == FILTER_GROUP || filter->type == FILTER_NOT_GROUP) { - return do_verify_filter(&filter->lval->filter, system, event); + return do_verify_filter(sb, &filter->lval->filter, system, event); } /* @@ -744,12 +759,12 @@ static int do_verify_filter(struct filter *filter, if (filter->lval->field.system != *system || filter->lval->field.event != *event) - return -1; + return verify_filter_error(sb, filter->lval, *event); return 0; } -static int verify_filter(struct filter *filter, +static int verify_filter(struct sqlhist_bison *sb, struct filter *filter, const char **system, const char **event) { int ret; @@ -761,17 +776,17 @@ static int verify_filter(struct filter *filter, case FILTER_NOT_GROUP: break; default: - return do_verify_filter(filter, system, event); + return do_verify_filter(sb, filter, system, event); } - ret = do_verify_filter(&filter->lval->filter, system, event); + ret = do_verify_filter(sb, &filter->lval->filter, system, event); if (ret) return ret; switch (filter->type) { case FILTER_OR: case FILTER_AND: - return do_verify_filter(&filter->rval->filter, system, event); + return do_verify_filter(sb, &filter->rval->filter, system, event); default: return 0; } @@ -1117,7 +1132,7 @@ static struct tracefs_synth *build_synth(struct tep_handle *tep, bool *started; bool start; - ret = verify_filter(&expr->filter, &filter_system, + ret = verify_filter(table->sb, &expr->filter, &filter_system, &filter_event); if (ret < 0) goto free;