1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _PERF_TARGET_H
 3#define _PERF_TARGET_H
 4
 5#include <stdbool.h>
 6#include <sys/types.h>
 7
 8struct target {
 9	const char   *pid;
10	const char   *tid;
11	const char   *cpu_list;
12	const char   *uid_str;
13	const char   *bpf_str;
14	uid_t	     uid;
15	bool	     system_wide;
16	bool	     uses_mmap;
17	bool	     default_per_cpu;
18	bool	     per_thread;
19	bool	     use_bpf;
20	bool	     hybrid;
21	const char   *attr_map;
22};
23
24enum target_errno {
25	TARGET_ERRNO__SUCCESS		= 0,
26
27	/*
28	 * Choose an arbitrary negative big number not to clash with standard
29	 * errno since SUS requires the errno has distinct positive values.
30	 * See 'Issue 6' in the link below.
31	 *
32	 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
33	 */
34	__TARGET_ERRNO__START		= -10000,
35
36	/* for target__validate() */
37	TARGET_ERRNO__PID_OVERRIDE_CPU	= __TARGET_ERRNO__START,
38	TARGET_ERRNO__PID_OVERRIDE_UID,
39	TARGET_ERRNO__UID_OVERRIDE_CPU,
40	TARGET_ERRNO__PID_OVERRIDE_SYSTEM,
41	TARGET_ERRNO__UID_OVERRIDE_SYSTEM,
42	TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD,
43	TARGET_ERRNO__BPF_OVERRIDE_CPU,
44	TARGET_ERRNO__BPF_OVERRIDE_PID,
45	TARGET_ERRNO__BPF_OVERRIDE_UID,
46	TARGET_ERRNO__BPF_OVERRIDE_THREAD,
47
48	/* for target__parse_uid() */
49	TARGET_ERRNO__INVALID_UID,
50	TARGET_ERRNO__USER_NOT_FOUND,
51
52	__TARGET_ERRNO__END,
53};
54
55enum target_errno target__validate(struct target *target);
56enum target_errno target__parse_uid(struct target *target);
57
58int target__strerror(struct target *target, int errnum, char *buf, size_t buflen);
59
60static inline bool target__has_task(struct target *target)
61{
62	return target->tid || target->pid || target->uid_str;
63}
64
65static inline bool target__has_cpu(struct target *target)
66{
67	return target->system_wide || target->cpu_list;
68}
69
70static inline bool target__none(struct target *target)
71{
72	return !target__has_task(target) && !target__has_cpu(target);
73}
74
75static inline bool target__has_per_thread(struct target *target)
76{
77	return target->system_wide && target->per_thread;
78}
79
80static inline bool target__uses_dummy_map(struct target *target)
81{
82	bool use_dummy = false;
83
84	if (target->default_per_cpu)
85		use_dummy = target->per_thread ? true : false;
86	else if (target__has_task(target) ||
87	         (!target__has_cpu(target) && !target->uses_mmap))
88		use_dummy = true;
89	else if (target__has_per_thread(target))
90		use_dummy = true;
91
92	return use_dummy;
93}
94
95#endif /* _PERF_TARGET_H */