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From: "Tzvetomir Stoyanov (VMware)" <>
Subject: [PATCH 2/2] libtracefs: Document new log functionality
Date: Wed, 28 Apr 2021 10:32:12 +0300
Message-ID: <> (raw)
In-Reply-To: <>

Updated man pages with the new log API.

Signed-off-by: Tzvetomir Stoyanov (VMware) <>
 Documentation/libtracefs-log.txt | 76 ++++++++++++++++++++++++++++++++
 Documentation/libtracefs.txt     |  2 +
 2 files changed, 78 insertions(+)
 create mode 100644 Documentation/libtracefs-log.txt

diff --git a/Documentation/libtracefs-log.txt b/Documentation/libtracefs-log.txt
new file mode 100644
index 0000000..a4107e8
--- /dev/null
+++ b/Documentation/libtracefs-log.txt
@@ -0,0 +1,76 @@
+tracefs_set_loglevel - Set log level of the library
+*#include <tracefs.h>*
+int *tracefs_set_loglevel*(enum tep_loglevel _level_);
+The _tracefs_set_loglevel()_ function sets the level of the library logs that will be printed on
+the console. See _libtraceevent(3)_ for detailed desciription of the log levels. Setting the log
+level to specific value means that logs from the previous levels will be printed too. For example
+_TEP_LOG_WARNING_ will print any logs with severity _TEP_LOG_WARNING_, _TEP_LOG_ERROR_ and
+_TEP_LOG_CRITICAL_. The default log level is _TEP_LOG_CRITICAL_.  When a new level is set, it is
+also propagated to the libtraceevent.
+#include <tracefs.h>
+/* call libtracefs or libtraceevent APIs and observe any logs they produce */
+	Header file to include in order to have access to the library APIs.
+	Linker switch to add when building a program that uses the library.
+*Steven Rostedt* <>
+*Tzvetomir Stoyanov* <>
+Report bugs to  <>
+libtracefs is Free Software licensed under the GNU LGPL 2.1
+Copyright \(C) 2021 VMware, Inc. Free use of this software is granted under
+the terms of the GNU Public License (GPL).
diff --git a/Documentation/libtracefs.txt b/Documentation/libtracefs.txt
index 77d053d..2c9eabd 100644
--- a/Documentation/libtracefs.txt
+++ b/Documentation/libtracefs.txt
@@ -61,6 +61,8 @@ Writing data in the trace buffer:
 	int *tracefs_binary_write*(struct tracefs_instance pass:[*]_instance_, void pass:[*]_data_, int _len_);
 	void *tracefs_binary_close*(struct tracefs_instance pass:[*]_instance_);
+Control library logs:
+	int *tracefs_set_loglevel*(enum tep_loglevel _level_);

      parent reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-28  7:32 [PATCH 0/2] Add API to set severity to tracefs library logs Tzvetomir Stoyanov (VMware)
2021-04-28  7:32 ` [PATCH 1/2] libtracefs: Add API to set the log level Tzvetomir Stoyanov (VMware)
2021-04-28  7:32 ` Tzvetomir Stoyanov (VMware) [this message]

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