eCryptfs: comments for some structs

	struct ecryptfs_crypt_stat *crypt_stat;

};

/**

 * ecryptfs_global_auth_tok structs refer to authentication token keys

 * in the user keyring that apply to newly created files. A list of

 * these objects hangs off of the mount_crypt_stat struct for any

 * given eCryptfs mount. This struct maintains a reference to both the

 * key contents and the key itself so that the key can be put on

 * unmount.

 */

struct ecryptfs_global_auth_tok {

#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001

	u32 flags;

	struct list_head mount_crypt_stat_list;

	struct key *global_auth_tok_key;

	struct ecryptfs_auth_tok *global_auth_tok;

	unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];

	struct list_head mount_crypt_stat_list; /* Default auth_tok list for

						 * the mount_crypt_stat */

	struct key *global_auth_tok_key; /* The key from the user's keyring for

					  * the sig */

	struct ecryptfs_auth_tok *global_auth_tok; /* The key contents */

	unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1]; /* The key identifier */

};

/**

 * Typically, eCryptfs will use the same ciphers repeatedly throughout

 * the course of its operations. In order to avoid unnecessarily

 * destroying and initializing the same cipher repeatedly, eCryptfs

 * keeps a list of crypto API contexts around to use when needed.

 */

struct ecryptfs_key_tfm {

	struct crypto_blkcipher *key_tfm;

	size_t key_size;

	struct mutex key_tfm_mutex;

	struct list_head key_tfm_list;

	struct list_head key_tfm_list; /* The module's tfm list */

	unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];

};