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