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#ifndef _LINUX_KEY_H
#define _LINUX_KEY_H
#include <linux/types.h>
#include <linux/list.h>
#include <linux/rbtree.h>
#include <linux/rcupdate.h>
#include <linux/sysctl.h>
#include <linux/rwsem.h>
#include <linux/atomic.h>
#include <keyutils.h>
struct key;
struct user_key_payload {
size_t datalen; /* length of this data */
char data[0]; /* actual data */
};
struct key {
atomic_t usage; /* number of references */
key_serial_t serial; /* key serial number */
struct rw_semaphore sem; /* change vs change sem */
struct user_key_payload payload;
};
static inline const struct user_key_payload *user_key_payload(const struct key *key)
{
return &key->payload;
}
static inline void key_put(struct key *key)
{
if (atomic_dec_and_test(&key->usage))
free(key);
}
static inline struct key *__key_get(struct key *key)
{
atomic_inc(&key->usage);
return key;
}
static inline struct key *key_get(struct key *key)
{
return key ? __key_get(key) : key;
}
#endif /* _LINUX_KEY_H */
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