diff options
author | Kent Overstreet <kent.overstreet@gmail.com> | 2016-10-03 19:22:17 -0800 |
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committer | Kent Overstreet <kent.overstreet@gmail.com> | 2017-02-28 03:05:38 -0900 |
commit | a5b5eba7f788bb77cf57f9c94f3474a2d439ab0b (patch) | |
tree | 278813d1b1a9024174531376d41a2ba04a3b27f6 /include/linux/key.h | |
parent | e4d1c93d85a5b86c04599bfc9f658308d741fd41 (diff) |
New on disk format - encryption
Diffstat (limited to 'include/linux/key.h')
-rw-r--r-- | include/linux/key.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/include/linux/key.h b/include/linux/key.h new file mode 100644 index 00000000..adc12a9e --- /dev/null +++ b/include/linux/key.h @@ -0,0 +1,50 @@ +#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 */ |