wrapper/user_namespace.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * wrapper/user_namespace.h
   4  *
   5  * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
   6  *
   7  */
   8
   9 #ifndef _LTTNG_WRAPPER_USER_NAMESPACE_H
  10 #define _LTTNG_WRAPPER_USER_NAMESPACE_H
  11
  12 #include <linux/version.h>
  13 #include <linux/user_namespace.h>
  14
  15
  16 #define lttng_current_xxuid(xxx)                                \
  17         (from_kuid_munged(&init_user_ns, current_##xxx()))
  18
  19 #define lttng_current_vxxuid(xxx)                               \
  20         (from_kuid_munged(current_user_ns(), current_##xxx()))
  21
  22 #define lttng_current_xxgid(xxx)                                \
  23         (from_kgid_munged(&init_user_ns, current_##xxx()))
  24
  25 #define lttng_current_vxxgid(xxx)                               \
  26         (from_kgid_munged(current_user_ns(), current_##xxx()))
  27
  28 static inline
  29 uid_t lttng_task_vuid(struct task_struct *p, struct user_namespace *ns)
  30 {
  31         uid_t uid;
  32         kuid_t kuid;
  33
  34         kuid = task_cred_xxx(p, uid);
  35         uid = from_kuid_munged(ns, kuid);
  36
  37         return uid;
  38 }
  39
  40 static inline
  41 gid_t lttng_task_vgid(struct task_struct *p, struct user_namespace *ns)
  42 {
  43         gid_t gid;
  44         kgid_t kgid;
  45
  46         kgid = task_cred_xxx(p, gid);
  47         gid = from_kgid_munged(ns, kgid);
  48
  49         return gid;
  50 }
  51
  52 #define lttng_current_uid()     (lttng_current_xxuid(uid))
  53 #define lttng_current_euid()    (lttng_current_xxuid(euid))
  54 #define lttng_current_suid()    (lttng_current_xxuid(suid))
  55 #define lttng_current_fsuid()   (lttng_current_xxuid(fsuid))
  56 #define lttng_current_gid()     (lttng_current_xxgid(gid))
  57 #define lttng_current_egid()    (lttng_current_xxgid(egid))
  58 #define lttng_current_sgid()    (lttng_current_xxgid(sgid))
  59 #define lttng_current_fsgid()   (lttng_current_xxgid(fsgid))
  60
  61 #define lttng_current_vuid()    (lttng_current_vxxuid(uid))
  62 #define lttng_current_veuid()   (lttng_current_vxxuid(euid))
  63 #define lttng_current_vsuid()   (lttng_current_vxxuid(suid))
  64 #define lttng_current_vfsuid()  (lttng_current_vxxuid(fsuid))
  65 #define lttng_current_vgid()    (lttng_current_vxxgid(gid))
  66 #define lttng_current_vegid()   (lttng_current_vxxgid(egid))
  67 #define lttng_current_vsgid()   (lttng_current_vxxgid(sgid))
  68 #define lttng_current_vfsgid()  (lttng_current_vxxgid(fsgid))
  69
  70 #endif /* _LTTNG_WRAPPER_USER_NAMESPACE_H */