34 supported_opts_mask(struct tracefs_instance *instance)  in supported_opts_mask()  argument
36 	return instance ? &instance->supported_opts : &toplevel_supported_opts;  in supported_opts_mask()
40 enabled_opts_mask(struct tracefs_instance *instance)  in enabled_opts_mask()  argument
42 	return instance ? &instance->enabled_opts : &toplevel_enabled_opts;  in enabled_opts_mask()
46  * instance_alloc - allocate a new ftrace instance
47  * @trace_dir - Full path to the tracing directory, where the instance is
48  * @name: The name of the instance (instance will point to this)
50  * Returns a newly allocated instance, or NULL in case of an error.
54 	struct tracefs_instance *instance;  in instance_alloc()  local
56 	instance = calloc(1, sizeof(*instance));  in instance_alloc()
57 	if (!instance)  in instance_alloc()
59 	instance->trace_dir = strdup(trace_dir);  in instance_alloc()
60 	if (!instance->trace_dir)  in instance_alloc()
63 		instance->name = strdup(name);  in instance_alloc()
64 		if (!instance->name)  in instance_alloc()
68 	if (pthread_mutex_init(&instance->lock, NULL) < 0)  in instance_alloc()
71 	instance->ftrace_filter_fd = -1;  in instance_alloc()
72 	instance->ftrace_notrace_fd = -1;  in instance_alloc()
73 	instance->ftrace_marker_fd = -1;  in instance_alloc()
74 	instance->ftrace_marker_raw_fd = -1;  in instance_alloc()
76 	return instance;  in instance_alloc()
79 	if (instance) {  in instance_alloc()
80 		free(instance->name);  in instance_alloc()
81 		free(instance->trace_dir);  in instance_alloc()
82 		free(instance);  in instance_alloc()
88 __hidden int trace_get_instance(struct tracefs_instance *instance)  in trace_get_instance()  argument
92 	pthread_mutex_lock(&instance->lock);  in trace_get_instance()
93 	if (instance->flags & FLAG_INSTANCE_DELETED) {  in trace_get_instance()
96 		instance->ref++;  in trace_get_instance()
99 	pthread_mutex_unlock(&instance->lock);  in trace_get_instance()
103 __hidden void trace_put_instance(struct tracefs_instance *instance)  in trace_put_instance()  argument
105 	pthread_mutex_lock(&instance->lock);  in trace_put_instance()
106 	if (--instance->ref < 0)  in trace_put_instance()
107 		instance->flags |= FLAG_INSTANCE_DELETED;  in trace_put_instance()
108 	pthread_mutex_unlock(&instance->lock);  in trace_put_instance()
110 	if (!(instance->flags & FLAG_INSTANCE_DELETED))  in trace_put_instance()
113 	if (instance->ftrace_filter_fd >= 0)  in trace_put_instance()
114 		close(instance->ftrace_filter_fd);  in trace_put_instance()
116 	if (instance->ftrace_notrace_fd >= 0)  in trace_put_instance()
117 		close(instance->ftrace_notrace_fd);  in trace_put_instance()
119 	if (instance->ftrace_marker_fd >= 0)  in trace_put_instance()
120 		close(instance->ftrace_marker_fd);  in trace_put_instance()
122 	if (instance->ftrace_marker_raw_fd >= 0)  in trace_put_instance()
123 		close(instance->ftrace_marker_raw_fd);  in trace_put_instance()
125 	free(instance->trace_dir);  in trace_put_instance()
126 	free(instance->name);  in trace_put_instance()
127 	pthread_mutex_destroy(&instance->lock);  in trace_put_instance()
128 	free(instance);  in trace_put_instance()
132  * tracefs_instance_free - Free an instance, previously allocated by
134  * @instance: Pointer to the instance to be freed
137 void tracefs_instance_free(struct tracefs_instance *instance)  in tracefs_instance_free()  argument
139 	if (!instance)  in tracefs_instance_free()
142 	trace_put_instance(instance);  in tracefs_instance_free()
165  * tracefs_instance_is_new - Check if the instance is newly created by the library
166  * @instance: Pointer to an ftrace instance
168  * Returns true, if the ftrace instance is newly created by the library or
171 bool tracefs_instance_is_new(struct tracefs_instance *instance)  in tracefs_instance_is_new()  argument
173 	if (instance && (instance->flags & FLAG_INSTANCE_NEWLY_CREATED))  in tracefs_instance_is_new()
179  * tracefs_instance_create - Create a new ftrace instance
180  * @name: Name of the instance to be created
182  * Allocates and initializes a new instance structure. If the instance does not
184  * Returns a pointer to a newly allocated instance, or NULL in case of an error.
185  * The returned instance must be freed by tracefs_instance_free().
206 		/* Cannot create the top instance, if it does not exist! */  in tracefs_instance_create()
223  * tracefs_instance_alloc - Allocate an instance structure for existing trace instance
224  * @tracing_dir: full path to the system trace directory, where the new instance is
226  * @name: Name of the instance.
228  * Allocates and initializes a new instance structure. If the instance does not
230  * Returns a pointer to a newly allocated instance, or NULL in case of an error
231  * or the requested instance does not exists.
232  * The returned instance must be freed by tracefs_instance_free().
266  * tracefs_instance_destroy - Remove a ftrace instance
267  * @instance: Pointer to the instance to be removed
271 int tracefs_instance_destroy(struct tracefs_instance *instance)  in tracefs_instance_destroy()  argument
276 	if (!instance || !instance->name) {  in tracefs_instance_destroy()
277 		tracefs_warning("Cannot remove top instance");  in tracefs_instance_destroy()
281 	path = tracefs_instance_get_dir(instance);  in tracefs_instance_destroy()
286 		pthread_mutex_lock(&instance->lock);  in tracefs_instance_destroy()
287 		instance->flags |= FLAG_INSTANCE_DELETED;  in tracefs_instance_destroy()
288 		pthread_mutex_unlock(&instance->lock);  in tracefs_instance_destroy()
295  * tracefs_instance_get_file - return the path to an instance file.
296  * @instance: ftrace instance, can be NULL for the top instance
299  * Returns the path of the @file for the given @instance, or NULL in
305 tracefs_instance_get_file(struct tracefs_instance *instance, const char *file)  in tracefs_instance_get_file()  argument
310 	if (!instance)  in tracefs_instance_get_file()
312 	if (!instance->name)  in tracefs_instance_get_file()
313 		ret = asprintf(&path, "%s/%s", instance->trace_dir, file);  in tracefs_instance_get_file()
316 			       instance->trace_dir, instance->name, file);  in tracefs_instance_get_file()
324  * tracefs_instance_get_dir - return the path to the instance directory.
325  * @instance: ftrace instance, can be NULL for the top instance
327  * Returns the full path to the instance directory
331 char *tracefs_instance_get_dir(struct tracefs_instance *instance)  in tracefs_instance_get_dir()  argument
336 	if (!instance) /* Top instance of default system trace directory */  in tracefs_instance_get_dir()
339 	if (!instance->name)  in tracefs_instance_get_dir()
340 		return strdup(instance->trace_dir);  in tracefs_instance_get_dir()
342 	ret = asprintf(&path, "%s/instances/%s", instance->trace_dir, instance->name);  in tracefs_instance_get_dir()
344 		tracefs_warning("Failed to allocate path for instance %s",  in tracefs_instance_get_dir()
345 				instance->name);  in tracefs_instance_get_dir()
353  * tracefs_instance_get_name - return the name of an instance
354  * @instance: ftrace instance
356  * Returns the name of the given @instance.
359 const char *tracefs_instance_get_name(struct tracefs_instance *instance)  in tracefs_instance_get_name()  argument
361 	if (instance)  in tracefs_instance_get_name()
362 		return instance->name;  in tracefs_instance_get_name()
368  * @instance: The instance to get the buffer size from
377 ssize_t tracefs_instance_get_buffer_size(struct tracefs_instance *instance, int cpu)  in tracefs_instance_get_buffer_size()  argument
385 		val = tracefs_instance_file_read(instance, "buffer_total_size_kb", NULL);  in tracefs_instance_get_buffer_size()
391 		val = tracefs_instance_file_read(instance, path, NULL);  in tracefs_instance_get_buffer_size()
403 int tracefs_instance_set_buffer_size(struct tracefs_instance *instance, size_t size, int cpu)  in tracefs_instance_set_buffer_size()  argument
414 		ret = tracefs_instance_file_write(instance, "buffer_size_kb", val);  in tracefs_instance_set_buffer_size()
422 		ret = tracefs_instance_file_write(instance, path, val);  in tracefs_instance_set_buffer_size()
431  * tracefs_instance_get_trace_dir - return the top trace directory, where the instance is confuigred
432  * @instance: ftrace instance
434  * Returns the top trace directory where the given @instance is configured.
437 const char *tracefs_instance_get_trace_dir(struct tracefs_instance *instance)  in tracefs_instance_get_trace_dir()  argument
439 	if (instance)  in tracefs_instance_get_trace_dir()
440 		return instance->trace_dir;  in tracefs_instance_get_trace_dir()
462 static int instance_file_write(struct tracefs_instance *instance,  in instance_file_write()  argument
469 	path = tracefs_instance_get_file(instance, file);  in instance_file_write()
481  * tracefs_instance_file_write - Write in trace file of specific instance.
482  * @instance: ftrace instance, can be NULL for the top instance
488 int tracefs_instance_file_write(struct tracefs_instance *instance,  in tracefs_instance_file_write()  argument
491 	return instance_file_write(instance, file, str, O_WRONLY | O_TRUNC);  in tracefs_instance_file_write()
495  * tracefs_instance_file_append - Append to a trace file of specific instance.
496  * @instance: ftrace instance, can be NULL for the top instance.
502 int tracefs_instance_file_append(struct tracefs_instance *instance,  in tracefs_instance_file_append()  argument
505 	return instance_file_write(instance, file, str, O_WRONLY);  in tracefs_instance_file_append()
509  * tracefs_instance_file_clear - Clear a trace file of specific instance.
519  * @instance: ftrace instance, can be NULL for the top instance.
524 int tracefs_instance_file_clear(struct tracefs_instance *instance,  in tracefs_instance_file_clear()  argument
527 	return instance_file_write(instance, file, NULL, O_WRONLY | O_TRUNC);  in tracefs_instance_file_clear()
531  * tracefs_instance_file_read - Read from a trace file of specific instance.
532  * @instance: ftrace instance, can be NULL for the top instance
540 char *tracefs_instance_file_read(struct tracefs_instance *instance,  in tracefs_instance_file_read()  argument
547 	path = tracefs_instance_get_file(instance, file);  in tracefs_instance_file_read()
562  * @instance: ftrace instance, can be NULL for the top instance
569 int tracefs_instance_file_read_number(struct tracefs_instance *instance,  in tracefs_instance_file_read_number()  argument
578 	str = tracefs_instance_file_read(instance, file, &size);  in tracefs_instance_file_read_number()
593  * @instance: ftrace instance, can be NULL for the top instance
600 int tracefs_instance_file_open(struct tracefs_instance *instance,  in tracefs_instance_file_open()  argument
607 	path = tracefs_instance_get_file(instance, file);  in tracefs_instance_file_open()
619 static bool check_file_exists(struct tracefs_instance *instance,  in check_file_exists()  argument
627 	path = tracefs_instance_get_dir(instance);  in check_file_exists()
641  * tracefs_instance_exists - Check an instance with given name exists
642  * @name: name of the instance
644  * Returns true if the instance exists, false otherwise
658  * tracefs_file_exists - Check if a file with given name exists in given instance
659  * @instance: ftrace instance, can be NULL for the top instance
666 bool tracefs_file_exists(struct tracefs_instance *instance, const char *name)  in tracefs_file_exists()  argument
668 	return check_file_exists(instance, name, false);  in tracefs_file_exists()
672  * tracefs_dir_exists - Check if a directory with given name exists in given instance
673  * @instance: ftrace instance, can be NULL for the top instance
678 bool tracefs_dir_exists(struct tracefs_instance *instance, const char *name)  in tracefs_dir_exists()  argument
680 	return check_file_exists(instance, name, true);  in tracefs_dir_exists()
685  * @callback: user callback, called for each instance. Instance name is passed
714 		char *instance;  in tracefs_instances_walk()  local
719 		instance = trace_append_file(path, dent->d_name);  in tracefs_instances_walk()
720 		ret = stat(instance, &st);  in tracefs_instances_walk()
721 		free(instance);  in tracefs_instances_walk()
772  * tracefs_instances - return a list of instance names
807  * @instance: ftrace instance, can be NULL for the top instance
809  * Returns the current trace clock of the given instance, or NULL in
813 char *tracefs_get_clock(struct tracefs_instance *instance)  in tracefs_get_clock()  argument
821 	all_clocks  = tracefs_instance_file_read(instance, "trace_clock", &bytes);  in tracefs_get_clock()
842  * @instance: The instance to set affinity to (NULL for top level)
845  * Sets the tracing affinity CPU mask for @instance. The @mask is the raw
850 int tracefs_instance_set_affinity_raw(struct tracefs_instance *instance,  in tracefs_instance_set_affinity_raw()  argument
853 	return tracefs_instance_file_write(instance, "tracing_cpumask", mask);  in tracefs_instance_set_affinity_raw()
858  * @instance: The instance to set affinity to (NULL for top level)
862  * Sets the tracing affinity CPU mask for @instance. The bits in @set will be
870 int tracefs_instance_set_affinity_set(struct tracefs_instance *instance,  in tracefs_instance_set_affinity_set()  argument
934 	ret = tracefs_instance_set_affinity_raw(instance, seq.buffer);  in tracefs_instance_set_affinity_set()
944  * @instance: The instance to set affinity to (NULL for top level)
947  * Sets the tracing affinity CPU mask for @instance. The @cpu_str is a set
960 int tracefs_instance_set_affinity(struct tracefs_instance *instance,  in tracefs_instance_set_affinity()  argument
976 		return tracefs_instance_set_affinity_set(instance, NULL, 0);  in tracefs_instance_set_affinity()
1036 	ret = tracefs_instance_set_affinity_set(instance, set, set_size);  in tracefs_instance_set_affinity()
1044  * tracefs_instance_get_affinity_raw - read the affinity instance file
1045  * @instance: The instance to get affinity of (NULL for top level)
1047  * Reads the affinity file for @instance (or the top level if @instance
1053 char *tracefs_instance_get_affinity_raw(struct tracefs_instance *instance)  in tracefs_instance_get_affinity_raw()  argument
1055 	return tracefs_instance_file_read(instance, "tracing_cpumask", NULL);  in tracefs_instance_get_affinity_raw()
1080  * tracefs_instance_get_affinity_set - Retrieve the cpuset of an instance affinity
1081  * @instance: The instance to get affinity of (NULL for top level)
1085  * Reads the affinity of a given instance and updates the CPU set by the
1086  * instance.
1090 int tracefs_instance_get_affinity_set(struct tracefs_instance *instance,  in tracefs_instance_get_affinity_set()  argument
1105 	affinity = tracefs_instance_get_affinity_raw(instance);  in tracefs_instance_get_affinity_set()
1178  * tracefs_instance_get_affinity - Retrieve a string of CPUs for instance affinity
1179  * @instance: The instance to get affinity of (NULL for top level)
1181  * Reads the affinity of a given instance and returns a CPU count of the
1182  * instance. For example, if it reads "eb" it will return:
1191 char *tracefs_instance_get_affinity(struct tracefs_instance *instance)  in tracefs_instance_get_affinity()  argument
1201 	affinity = tracefs_instance_get_affinity_raw(instance);  in tracefs_instance_get_affinity()