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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* user-type.h: User-defined key type
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*
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* Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#ifndef _KEYS_USER_TYPE_H
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#define _KEYS_USER_TYPE_H
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#include <linux/key.h>
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#include <linux/rcupdate.h>
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#ifdef CONFIG_KEYS
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/*****************************************************************************/
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/*
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* the payload for a key of type "user" or "logon"
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* - once filled in and attached to a key:
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* - the payload struct is invariant may not be changed, only replaced
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* - the payload must be read with RCU procedures or with the key semaphore
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* held
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* - the payload may only be replaced with the key semaphore write-locked
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* - the key's data length is the size of the actual data, not including the
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* payload wrapper
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*/
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struct user_key_payload {
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struct rcu_head rcu; /* RCU destructor */
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unsigned short datalen; /* length of this data */
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char data[0] __aligned(__alignof__(u64)); /* actual data */
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};
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extern struct key_type key_type_user;
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extern struct key_type key_type_logon;
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struct key_preparsed_payload;
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extern int user_preparse(struct key_preparsed_payload *prep);
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extern void user_free_preparse(struct key_preparsed_payload *prep);
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extern int user_update(struct key *key, struct key_preparsed_payload *prep);
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extern void user_revoke(struct key *key);
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extern void user_destroy(struct key *key);
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extern void user_describe(const struct key *user, struct seq_file *m);
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extern long user_read(const struct key *key,
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char __user *buffer, size_t buflen);
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static inline const struct user_key_payload *user_key_payload_rcu(const struct key *key)
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{
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return (struct user_key_payload *)dereference_key_rcu(key);
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}
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static inline struct user_key_payload *user_key_payload_locked(const struct key *key)
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{
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return (struct user_key_payload *)dereference_key_locked((struct key *)key);
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}
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#endif /* CONFIG_KEYS */
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#endif /* _KEYS_USER_TYPE_H */
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