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

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