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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859/* SPDX-License-Identifier: GPL-2.0-or-later *//* user-type.h: User-defined key type * * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */
#ifndef _KEYS_USER_TYPE_H#define _KEYS_USER_TYPE_H
#include <linux/key.h>#include <linux/rcupdate.h>
#ifdef CONFIG_KEYS
/*****************************************************************************//* * the payload for a key of type "user" or "logon" * - 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[] __aligned(__alignof__(u64)); /* actual data */};
extern struct key_type key_type_user;extern struct key_type key_type_logon;
struct key_preparsed_payload;
extern int user_preparse(struct key_preparsed_payload *prep);extern void user_free_preparse(struct key_preparsed_payload *prep);extern int user_update(struct key *key, struct key_preparsed_payload *prep);extern void user_revoke(struct key *key);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 *buffer, size_t buflen);
static inline const struct user_key_payload *user_key_payload_rcu(const struct key *key){ return (struct user_key_payload *)dereference_key_rcu(key);}
static inline struct user_key_payload *user_key_payload_locked(const struct key *key){ return (struct user_key_payload *)dereference_key_locked((struct key *)key);}
#endif /* CONFIG_KEYS */
#endif /* _KEYS_USER_TYPE_H */