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include/keys/user-type.h
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/* user-type.h: User-defined key type * * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * 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. */ #ifndef _KEYS_USER_TYPE_H #define _KEYS_USER_TYPE_H #include <linux/key.h> #include <linux/rcupdate.h> |
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#ifdef CONFIG_KEYS |
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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: * - the payload struct is invariant may not be changed, only replaced * - the payload must be read with RCU procedures or with the key semaphore * held * - the payload may only be replaced with the key semaphore write-locked * - the key's data length is the size of the actual data, not including the * payload wrapper */ struct user_key_payload { struct rcu_head rcu; /* RCU destructor */ unsigned short datalen; /* length of this data */ char data[0]; /* actual data */ }; 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); 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); extern void user_describe(const struct key *user, struct seq_file *m); extern long user_read(const struct key *key, char __user *buffer, size_t buflen); |
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static inline const struct user_key_payload *user_key_payload(const struct key *key) { return (struct user_key_payload *)rcu_dereference_key(key); } #endif /* CONFIG_KEYS */ |
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#endif /* _KEYS_USER_TYPE_H */ |