From patchwork Mon Nov 19 12:54:33 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10759775 Return-Path: Received: from mail-eopbgr790085.outbound.protection.outlook.com ([40.107.79.85]:11680 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728882AbeKSXST (ORCPT ); Mon, 19 Nov 2018 18:18:19 -0500 From: Tzvetomir Stoyanov To: "rostedt@goodmis.org" CC: "linux-trace-devel@vger.kernel.org" Subject: [PATCH 22/34] tools/lib/traceevent: Man pages for tep_filter_event_has_trivial(), tep_update_trivial() and tep_filter_clear_trivial() Date: Mon, 19 Nov 2018 12:54:33 +0000 Message-ID: <20181119125357.19449-23-tstoyanov@vmware.com> References: <20181119125357.19449-1-tstoyanov@vmware.com> In-Reply-To: <20181119125357.19449-1-tstoyanov@vmware.com> Content-Language: en-US MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org List-ID: Content-Length: 4031 Create man pages for tep_filter_event_has_trivial(), tep_update_trivial() and tep_filter_clear_trivial() as part of the libtraceevent APIs. Signed-off-by: Tzvetomir Stoyanov --- .../libtraceevent-filter_trivial.txt | 112 ++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-filter_trivial.txt diff --git a/tools/lib/traceevent/Documentation/libtraceevent-filter_trivial.txt b/tools/lib/traceevent/Documentation/libtraceevent-filter_trivial.txt new file mode 100644 index 000000000000..8afd50b29269 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-filter_trivial.txt @@ -0,0 +1,112 @@ +libtraceevent(3) +================ + +NAME +---- +tep_filter_event_has_trivial,tep_update_trivial,tep_filter_clear_trivial - Check / update / clear trivial rules of given filter. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +enum *tep_filter_trivial_type* { + _TEP_FILTER_TRIVIAL_FALSE_, + _TEP_FILTER_TRIVIAL_TRUE_, + _TEP_FILTER_TRIVIAL_BOTH_, +}; + +int *tep_filter_event_has_trivial*(struct tep_event_filter pass:[*]_filter_, int _event_id_, enum tep_filter_trivial_type _type_); +int *tep_update_trivial*(struct tep_event_filter pass:[*]_dest_, struct tep_event_filter pass:[*]_source_, enum tep_filter_trivial_type _type_); +int *tep_filter_clear_trivial*(struct tep_event_filter pass:[*]_filter_, enum tep_filter_trivial_type _type_); +-- + +DESCRIPTION +----------- +The _tep_filter_event_has_trivial()_ function checks if the event with +_event_id_ contains a trivial _filter_ of _type_. + +The _tep_update_trivial()_ function updates the trivial rules with the given +filter. It scans _dest_ for trivial events matching _type_ to replace with +the _source_. + +The _tep_filter_clear_trivial()_ function clears TRUE and FALSE rules. +It removes rules in the _filter_ that only contain a given _type_ boolean arg. + +The trivial _type_, used as argument of these functions can be: +[verse] +-- + _TEP_FILTER_TRIVIAL_FALSE_ - TRUE + _TEP_FILTER_TRIVIAL_TRUE_ - FALSE + _TEP_FILTER_TRIVIAL_BOTH_ - TRUE or FALSE + +-- + +RETURN VALUE +------------ +The _tep_filter_event_has_trivial()_ function returns 1 if the event contains +a matching trivial type, otherwise 0. + +The _tep_update_trivial()_ function returns 0 on success, or -1 if there was +a problem updating, but events may have still been updated on error. + +The _tep_filter_clear_trivial()_ function returns 0 on success, or -1 if there +was a problem. + +EXAMPLE +------- +[source,c] +-- +#include +... +struct tep_handle *tep = tep_alloc(); +struct tep_event_filter *filter1 = tep_filter_alloc(tep); +struct tep_event_filter *filter2 = tep_filter_alloc(tep); +... +if (tep_filter_event_has_trivial(filter1, 1857,TEP_FILTER_TRIVIAL_FALSE) == 0) { + /* There are FALSE rules in filer1 for the event 1857 */ +} + +if (tep_update_trivial(filter1, filter2, TEP_FILTER_TRIVIAL_TRUE) != 0) { + /* Failed to update TRUE trivial rules of filter1 with filter2 */ +} + +if (tep_filter_clear_trivial(filter, TEP_FILTER_TRIVIAL_BOTH) == 0) { + /* Failed to clear TRUE and FALSE trivial rules of filter1 */ +} +... +-- + +FILES +----- +[verse] +-- +*event-parse.h* + Header file to include in order to have access to the library APIs. +*-ltraceevent* + Linker switch to add when building a program that uses the library. +-- + +SEE ALSO +-------- +_libtraceevent(3)_, _trace-cmd(1)_ + +AUTHOR +------ +[verse] +-- +*Steven Rostedt* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +LICENSE +------- +libtraceevent is Free Software licensed under the GNU LGPL 2.1 + +RESOURCES +--------- +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git