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([95.87.219.163]) by smtp.gmail.com with ESMTPSA id d6sm11782668wrn.53.2021.12.06.07.09.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Dec 2021 07:09:10 -0800 (PST) From: "Yordan Karadzhov (VMware)" To: linux-trace-devel@vger.kernel.org, rostedt@goodmis.org Cc: "Yordan Karadzhov (VMware)" Subject: [PATCH 3/3] libtracefs: Add new API for getting synth event name WiP Date: Mon, 6 Dec 2021 17:08:55 +0200 Message-Id: <20211206150855.361202-4-y.karadz@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211206150855.361202-1-y.karadz@gmail.com> References: <20211206150855.361202-1-y.karadz@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Signed-off-by: Yordan Karadzhov (VMware) --- Documentation/libtracefs-synth2.txt | 8 ++++++-- include/tracefs.h | 1 + src/tracefs-hist.c | 11 +++++++++++ 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/Documentation/libtracefs-synth2.txt b/Documentation/libtracefs-synth2.txt index 1cb07c8..2439a54 100644 --- a/Documentation/libtracefs-synth2.txt +++ b/Documentation/libtracefs-synth2.txt @@ -3,8 +3,9 @@ libtracefs(3) NAME ---- -tracefs_synth_create, tracefs_synth_destroy, tracefs_synth_echo_cmd,tracefs_synth_complete, -tracefs_synth_get_start_hist,tracefs_synth_trace,tracefs_synth_snapshot - Creation of synthetic events +tracefs_synth_create, tracefs_synth_destroy, tracefs_synth_echo_cmd, tracefs_synth_complete, +tracefs_synth_get_start_hist, tracefs_synth_trace, tracefs_synth_snapshot, +tracefs_synth_get_name - Creation of synthetic events SYNOPSIS -------- @@ -25,6 +26,7 @@ int tracefs_synth_snapshot(struct tracefs_synth pass:[*]synth, int tracefs_synth_save(struct tracefs_synth pass:[*]synth, enum tracefs_synth_handler type, const char pass:[*]var, char pass:[**]save_fields); +tracefs_synth_get_name(struct tracefs_synth pass:[*]synth); -- DESCRIPTION @@ -87,6 +89,8 @@ then saven the given _save_fields_ list. The fields will be stored in the histog "hist" file of the event that can be retrieved with *tracefs_event_file_read*(3). _var_ changes. _var_ must be one of the _name_ elements used in *tracefs_synth_add_end_field*(3). +*tracefs_synth_get_name*() get the name of the synthetic event. + RETURN VALUE ------------ Returns zero on success or -1 on error. diff --git a/include/tracefs.h b/include/tracefs.h index 7c03086..804d738 100644 --- a/include/tracefs.h +++ b/include/tracefs.h @@ -505,6 +505,7 @@ enum tracefs_synth_handler { TRACEFS_SYNTH_HANDLE_CHANGE, }; +const char *tracefs_synth_get_name(struct tracefs_synth *synth); struct tracefs_synth *tracefs_synth_alloc(struct tep_handle *tep, const char *name, const char *start_system, diff --git a/src/tracefs-hist.c b/src/tracefs-hist.c index 837d4e1..41c88d1 100644 --- a/src/tracefs-hist.c +++ b/src/tracefs-hist.c @@ -736,6 +736,17 @@ struct tracefs_synth { int arg_cnt; }; + /* + * tracefs_synth_get_name - get the name of the synthetic event + * @synth: The synthetic event to get the name for + * + * Returns name string on succes or NULL on error. + */ +const char *tracefs_synth_get_name(struct tracefs_synth *synth) +{ + return synth ? synth->name : NULL; +} + static void action_free(struct action *action) { free(action->handle_field);