-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * wrapper/user_namespace.h
- *
- * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com>
- *
- */
-
-#ifndef _LTTNG_WRAPPER_USER_NAMESPACE_H
-#define _LTTNG_WRAPPER_USER_NAMESPACE_H
-
-#include <lttng/kernel-version.h>
-#include <linux/user_namespace.h>
-
-
-#if LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3, 5, 0)
-
-#define lttng_current_xxuid(xxx) \
- (from_kuid_munged(&init_user_ns, current_##xxx()))
-
-#define lttng_current_vxxuid(xxx) \
- (from_kuid_munged(current_user_ns(), current_##xxx()))
-
-#define lttng_current_xxgid(xxx) \
- (from_kgid_munged(&init_user_ns, current_##xxx()))
-
-#define lttng_current_vxxgid(xxx) \
- (from_kgid_munged(current_user_ns(), current_##xxx()))
-
-static inline
-uid_t lttng_task_vuid(struct task_struct *p, struct user_namespace *ns)
-{
- uid_t uid;
- kuid_t kuid;
-
- kuid = task_cred_xxx(p, uid);
- uid = from_kuid_munged(ns, kuid);
-
- return uid;
-}
-
-static inline
-gid_t lttng_task_vgid(struct task_struct *p, struct user_namespace *ns)
-{
- gid_t gid;
- kgid_t kgid;
-
- kgid = task_cred_xxx(p, gid);
- gid = from_kgid_munged(ns, kgid);
-
- return gid;
-}
-
-#else
-
-#define lttng_current_xxuid(xxx) (current_##xxx())
-
-#define lttng_current_vxxuid(xxx) \
- (user_ns_map_uid(current_user_ns(), current_cred(), current_##xxx()))
-
-#define lttng_current_xxgid(xxx) (current_##xxx())
-
-#define lttng_current_vxxgid(xxx) \
- (user_ns_map_gid(current_user_ns(), current_cred(), current_##xxx()))
-
-static inline
-uid_t lttng_task_vuid(struct task_struct *p, struct user_namespace *ns)
-{
- uid_t uid;
-
- /*
- * __task_cred requires the RCU readlock be held
- */
- rcu_read_lock();
- uid = user_ns_map_uid(ns, __task_cred(p), __task_cred(p)->uid);
- rcu_read_unlock();
-
- return uid;
-}
-
-static inline
-gid_t lttng_task_vgid(struct task_struct *p, struct user_namespace *ns)
-{
- gid_t gid;
-
- /*
- * __task_cred requires the RCU readlock be held
- */
- rcu_read_lock();
- gid = user_ns_map_gid(ns, __task_cred(p), __task_cred(p)->gid);
- rcu_read_unlock();
-
- return gid;
-}
-
-#endif
-
-#define lttng_current_uid() (lttng_current_xxuid(uid))
-#define lttng_current_euid() (lttng_current_xxuid(euid))
-#define lttng_current_suid() (lttng_current_xxuid(suid))
-#define lttng_current_fsuid() (lttng_current_xxuid(fsuid))
-#define lttng_current_gid() (lttng_current_xxgid(gid))
-#define lttng_current_egid() (lttng_current_xxgid(egid))
-#define lttng_current_sgid() (lttng_current_xxgid(sgid))
-#define lttng_current_fsgid() (lttng_current_xxgid(fsgid))
-
-#define lttng_current_vuid() (lttng_current_vxxuid(uid))
-#define lttng_current_veuid() (lttng_current_vxxuid(euid))
-#define lttng_current_vsuid() (lttng_current_vxxuid(suid))
-#define lttng_current_vfsuid() (lttng_current_vxxuid(fsuid))
-#define lttng_current_vgid() (lttng_current_vxxgid(gid))
-#define lttng_current_vegid() (lttng_current_vxxgid(egid))
-#define lttng_current_vsgid() (lttng_current_vxxgid(sgid))
-#define lttng_current_vfsgid() (lttng_current_vxxgid(fsgid))
-
-#endif /* _LTTNG_WRAPPER_USER_NAMESPACE_H */