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