blob: 6d01404070a5427507bd1826a6ecdc9f45c88296 [file] [log] [blame]
/*
* Copyright 2012 Luis R. Rodriguez <mcgrof@do-not-panic.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Backport functionality introduced in Linux user_namespace.c
*/
#include <linux/module.h>
#include <linux/highuid.h>
#include <linux/uidgid.h>
#include <linux/user_namespace.h>
#ifdef CONFIG_USER_NS
kuid_t make_kuid(struct user_namespace *ns, uid_t uid)
{
/* Map the uid to a global kernel uid */
return KUIDT_INIT(uid);
}
EXPORT_SYMBOL_GPL(make_kuid);
uid_t from_kuid(struct user_namespace *targ, kuid_t kuid)
{
/* Map the uid from a global kernel uid */
return __kuid_val(kuid);
}
EXPORT_SYMBOL_GPL(from_kuid);
uid_t from_kuid_munged(struct user_namespace *targ, kuid_t kuid)
{
uid_t uid;
uid = from_kuid(targ, kuid);
if (uid == (uid_t) -1)
uid = overflowuid;
return uid;
}
EXPORT_SYMBOL_GPL(from_kuid_munged);
kgid_t make_kgid(struct user_namespace *ns, gid_t gid)
{
/* Map the gid to a global kernel gid */
return KGIDT_INIT(gid);
}
EXPORT_SYMBOL_GPL(make_kgid);
gid_t from_kgid(struct user_namespace *targ, kgid_t kgid)
{
/* Map the gid from a global kernel gid */
return __kgid_val(kgid);
}
EXPORT_SYMBOL_GPL(from_kgid);
gid_t from_kgid_munged(struct user_namespace *targ, kgid_t kgid)
{
gid_t gid;
gid = from_kgid(targ, kgid);
if (gid == (gid_t) -1)
gid = overflowgid;
return gid;
}
EXPORT_SYMBOL_GPL(from_kgid_munged);
#endif /* CONFIG_USER_NS */