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        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 */
  96