[PATCH 5/9] libtracefs man pages: APIs for managing trace instances.

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

Documented APIs:
tracefs_instance_create()
tracefs_instance_destroy()
tracefs_instance_free()
tracefs_instance_is_new()

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 Documentation/libtracefs-instances-manage.txt | 104 ++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 Documentation/libtracefs-instances-manage.txt

diff --git a/Documentation/libtracefs-instances-manage.txt b/Documentation/libtracefs-instances-manage.txt
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+libtracefs(3)
+=============
+
+NAME
+----
+tracefs_instance_create, tracefs_instance_destroy, tracefs_instance_free,
+tracefs_instance_is_new - Manage trace instances.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <tracefs.h>*
+
+struct tracefs_instance pass:[*]*tracefs_instance_create*(const char pass:[*]_name_);
+int *tracefs_instance_destroy*(struct tracefs_instance pass:[*]_instance_);
+void *tracefs_instance_free*(struct tracefs_instance pass:[*]_instance_);
+bool *tracefs_instance_is_new*(struct tracefs_instance pass:[*]_instance_);
+
+--
+
+DESCRIPTION
+-----------
+This set of functions can be used to manage trace instances.
+
+The _tracefs_instance_create()_ function creates a new trace instance with given
+_name_, if it does not already exist in the system. It allocates and initializes
+a new tracefs_instance structure and returns it.
+
+The _tracefs_instance_destroy()_ destroys the trace _instance_ and frees the
+tracefs_instance structure.
+
+The _tracefs_instance_free()_ function frees the tracefs_instance structure,
+without destroying the trace instance.
+
+The _tracefs_instance_is_new()_ function checks if the given _instance_ is newly
+created by _tracefs_instance_create()_, or it has been in the system before that.
+
+RETURN VALUE
+------------
+The _tracefs_instance_create()_ function returns a pointer to a newly allocated
+tracefs_instance structure. It must be freed with _tracefs_instance_destroy()_ or
+_tracefs_instance_free()_.
+
+The _tracefs_instance_destroy()_ function returns -1 in case of an error,
+or 0 otherwise.
+
+The _tracefs_instance_is_new()_ function returns true if the instance is
+created by _tracefs_instance_create()_ or false if it was in the system
+before that.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <tracefs.h>
+
+struct tracefs_instance *inst = tracefs_instance_create("foo");
+	if (!inst) {
+		/* Error creating a new trace instance */
+		...
+	}
+
+	...
+
+	if (tracefs_instance_is_new(inst))
+		tracefs_instance_destroy(inst);
+	else
+		tracefs_instance_free(inst);
+--
+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@goodmis.org>
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>
+--
+REPORTING BUGS
+--------------
+Report bugs to  <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtracefs is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/
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2.28.0