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
  16#ifndef HAVE_SETNS_SUPPORT
  17int setns(int fd, int nstype);
  18#endif
  19
  20struct namespaces_event;
  21
  22struct namespaces {
  23        struct list_head list;
  24        u64 end_time;
  25        struct perf_ns_link_info link_info[];
  26};
  27
  28struct namespaces *namespaces__new(struct namespaces_event *event);
  29void namespaces__free(struct namespaces *namespaces);
  30
  31struct nsinfo {
  32        pid_t                   pid;
  33        pid_t                   tgid;
  34        pid_t                   nstgid;
  35        bool                    need_setns;
  36        char                    *mntns_path;
  37        refcount_t              refcnt;
  38};
  39
  40struct nscookie {
  41        int                     oldns;
  42        int                     newns;
  43        char                    *oldcwd;
  44};
  45
  46int nsinfo__init(struct nsinfo *nsi);
  47struct nsinfo *nsinfo__new(pid_t pid);
  48struct nsinfo *nsinfo__copy(struct nsinfo *nsi);
  49void nsinfo__delete(struct nsinfo *nsi);
  50
  51struct nsinfo *nsinfo__get(struct nsinfo *nsi);
  52void nsinfo__put(struct nsinfo *nsi);
  53
  54void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
  55void nsinfo__mountns_exit(struct nscookie *nc);
  56
  57char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
  58
  59static inline void __nsinfo__zput(struct nsinfo **nsip)
  60{
  61        if (nsip) {
  62                nsinfo__put(*nsip);
  63                *nsip = NULL;
  64        }
  65}
  66
  67#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
  68
  69#endif  /* __PERF_NAMESPACES_H */
  70