Documented APIs:
tracefs_local_events()
tracefs_local_events_system()
tracefs_fill_local_events()
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
Documentation/libtracefs-events-tep.txt | 130 ++++++++++++++++++++++++
1 file changed, 130 insertions(+)
create mode 100644 Documentation/libtracefs-events-tep.txt
diff --git a/Documentation/libtracefs-events-tep.txt b/Documentation/libtracefs-events-tep.txt
new file mode 100644
index 0000000..f7d7a61
--- /dev/null
+++ b/Documentation/libtracefs-events-tep.txt
@@ -0,0 +1,130 @@
+libtracefs(3)
+=============
+
+NAME
+----
+tracefs_local_events, tracefs_local_events_system, tracefs_fill_local_events -
+Initialize a tep handler with trace events from the local system.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <tracefs.h>*
+
+struct tep_handle pass:[*]*tracefs_local_events*(const char pass:[*]_tracing_dir_);
+struct tep_handle pass:[*]*tracefs_local_events_system*(const char pass:[*]_tracing_dir_, const char pass:[*] const pass:[*]_sys_names_);
+int *tracefs_fill_local_events*(const char pass:[*]_tracing_dir_, struct tep_handle pass:[*]_tep_, int pass:[*]_parsing_failures_);
+
+--
+
+DESCRIPTION
+-----------
+Functions for initializing a tep handler with trace events from the local system.
+
+The _tracefs_local_events()_ function allocates a new _tep_ handler and
+initializes it with events from all trace systems, located in the given
+_tracing_dir_ directory. This could be NULL or the location of the tracefs
+mount point for the trace systems of the local machine, or it may be a path
+to a copy of the tracefs directory from another machine.
+
+The _tracefs_local_events_system()_ function allocates a new _tep_ handler
+and initializes it with events from specified trace systems _sys_names_,
+located in the given _tracing_dir_ directory. This could be NULL or the
+location of the tracefs mount point for the trace systems of the local
+machine, or it may be a path to a copy of the tracefs directory from another
+machine. The _sys_names_ argument is an array of trace system names, that
+will be used for _tep_ handler initialization. The last element in that
+array must be a NULL pointer.
+
+The _tracefs_fill_local_events()_ function initializes already allocated _tep_
+handler with events from all trace systems, located in the given _tracing_dir_
+directory. This could be NULL or the location of the tracefs mount point
+for the trace systems of the local machine, or it may be a path to a copy
+of the tracefs directory from another machine. The _tep_ argument must be
+a pointer to already allocated tep handler, that is going to be initialized.
+The _parsing_failures_ argument could be NULL or a pointer to an integer,
+where the number of failures while parsing the event files are returned.
+
+RETURN VALUE
+------------
+The _tracefs_local_events()_ and _tracefs_local_events_system()_ functions
+return pointer to allocated and initialized _tep_ handler, or NULL in
+case of an error. The returned _tep_ handler must be freed with _tep_free(3)_.
+
+The _tracefs_fill_local_events()_ function returns -1 in case of an error or
+0 otherwise.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <tracefs.h>
+
+struct tep_event *tep;
+...
+ tep = tracefs_local_events(NULL);
+ if (!tep) {
+ /* Failed to initialise tep handler with local events from top instance */
+ ...
+ }
+...
+ tep_free(tep);
+...
+ const char *systems[] = {"ftrace", "irq", NULL};
+ tep = tracefs_local_events_system(NULL, systems);
+ if (!tep) {
+ /* Failed to initialise tep handler with local events from
+ * ftrace and irq systems in top instance.
+ */
+ ...
+ }
+...
+ tep_free(tep);
+...
+ int parsing_failures;
+ tep = tep_alloc();
+ if (!tep) {
+ /* Failed to allocate a tep handler */
+ ...
+ }
+ if (tracefs_fill_local_events(NULL, tep, &parsing_failures) < 0) {
+ /* Failed to initialise tep handler with local events from top instance */
+ }
+...
+ tep_free(tep);
+--
+FILES
+-----
+[verse]
+--
+*tracefs.h*
+ Header file to include in order to have access to the library APIs.
+*-ltracefs*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+_libtracefs(3)_,
+_libtraceevent(3)_,
+_trace-cmd(1)_
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@xxxxxxxxxxx>
+*Tzvetomir Stoyanov* <tz.stoyanov@xxxxxxxxx>
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@xxxxxxxxxxxxxxx>
+
+LICENSE
+-------
+libtracefs is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/
\ No newline at end of file
--
2.28.0
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