LXR linux/tools/perf/util/namespaces.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *
   4 * Copyright (C) 2017 Hari Bathini, IBM Corporation
   5 */
   6
   7#ifndef __PERF_NAMESPACES_H
   8#define __PERF_NAMESPACES_H
   9
  10#include <sys/types.h>
  11#include <linux/stddef.h>
  12#include <linux/perf_event.h>
  13#include <linux/refcount.h>
  14#include <linux/types.h>
  15
  16struct namespaces_event;
  17
  18struct namespaces {
  19        struct list_head list;
  20        u64 end_time;
  21        struct perf_ns_link_info link_info[];
  22};
  23
  24struct namespaces *namespaces__new(struct namespaces_event *event);
  25void namespaces__free(struct namespaces *namespaces);
  26
  27struct nsinfo {
  28        pid_t                   pid;
  29        pid_t                   tgid;
  30        pid_t                   nstgid;
  31        bool                    need_setns;
  32        char                    *mntns_path;
  33        refcount_t              refcnt;
  34};
  35
  36struct nscookie {
  37        int                     oldns;
  38        int                     newns;
  39        char                    *oldcwd;
  40};
  41
  42int nsinfo__init(struct nsinfo *nsi);
  43struct nsinfo *nsinfo__new(pid_t pid);
  44struct nsinfo *nsinfo__copy(struct nsinfo *nsi);
  45void nsinfo__delete(struct nsinfo *nsi);
  46
  47struct nsinfo *nsinfo__get(struct nsinfo *nsi);
  48void nsinfo__put(struct nsinfo *nsi);
  49
  50void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
  51void nsinfo__mountns_exit(struct nscookie *nc);
  52
  53char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
  54
  55static inline void __nsinfo__zput(struct nsinfo **nsip)
  56{
  57        if (nsip) {
  58                nsinfo__put(*nsip);
  59                *nsip = NULL;
  60        }
  61}
  62
  63#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
  64
  65#endif  /* __PERF_NAMESPACES_H */
  66