include/linux/sunrpc/auth.h

Source file repositories/reference/linux-study-clean/include/linux/sunrpc/auth.h

File Facts

System
Linux kernel
Corpus path
include/linux/sunrpc/auth.h
Extension
.h
Size
6261 bytes
Lines
198
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct auth_cred {
	const struct cred *cred;
	const char *principal;	/* If present, this is a machine credential */
};

/*
 * Client user credentials
 */
struct rpc_auth;
struct rpc_credops;
struct rpc_cred {
	struct hlist_node	cr_hash;	/* hash chain */
	struct list_head	cr_lru;		/* lru garbage collection */
	struct rcu_head		cr_rcu;
	struct rpc_auth *	cr_auth;
	const struct rpc_credops *cr_ops;
	unsigned long		cr_expire;	/* when to gc */
	unsigned long		cr_flags;	/* various flags */
	refcount_t		cr_count;	/* ref count */
	const struct cred	*cr_cred;

	/* per-flavor data */
};
#define RPCAUTH_CRED_NEW	0
#define RPCAUTH_CRED_UPTODATE	1
#define RPCAUTH_CRED_HASHED	2
#define RPCAUTH_CRED_NEGATIVE	3

const struct cred *rpc_machine_cred(void);

/*
 * Client authentication handle
 */
struct rpc_cred_cache;
struct rpc_authops;
struct rpc_auth {
	unsigned int		au_cslack;	/* call cred size estimate */
	unsigned int		au_rslack;	/* reply cred size estimate */
	unsigned int		au_verfsize;	/* size of reply verifier */
	unsigned int		au_ralign;	/* words before UL header */

	unsigned long		au_flags;
	const struct rpc_authops *au_ops;
	rpc_authflavor_t	au_flavor;	/* pseudoflavor (note may
						 * differ from the flavor in
						 * au_ops->au_flavor in gss
						 * case) */
	refcount_t		au_count;	/* Reference counter */

	struct rpc_cred_cache *	au_credcache;
	/* per-flavor data */
};

/* rpc_auth au_flags */
#define RPCAUTH_AUTH_DATATOUCH		(1)
#define RPCAUTH_AUTH_UPDATE_SLACK	(2)

struct rpc_auth_create_args {
	rpc_authflavor_t pseudoflavor;
	const char *target_name;
};

/* Flags for rpcauth_lookupcred() */
#define RPCAUTH_LOOKUP_NEW		0x01	/* Accept an uninitialised cred */
#define RPCAUTH_LOOKUP_ASYNC		0x02	/* Don't block waiting for memory */

/*
 * Client authentication ops
 */
struct rpc_authops {
	struct module		*owner;
	rpc_authflavor_t	au_flavor;	/* flavor (RPC_AUTH_*) */
	char *			au_name;
	struct rpc_auth *	(*create)(const struct rpc_auth_create_args *,
					  struct rpc_clnt *);
	void			(*destroy)(struct rpc_auth *);

	int			(*hash_cred)(struct auth_cred *, unsigned int);
	struct rpc_cred *	(*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
	struct rpc_cred *	(*crcreate)(struct rpc_auth*, struct auth_cred *, int, gfp_t);
	rpc_authflavor_t	(*info2flavor)(struct rpcsec_gss_info *);
	int			(*flavor2info)(rpc_authflavor_t,
						struct rpcsec_gss_info *);
	int			(*key_timeout)(struct rpc_auth *,
						struct rpc_cred *);
	int			(*ping)(struct rpc_clnt *clnt);
};

struct rpc_credops {
	const char *		cr_name;	/* Name of the auth flavour */

Annotation

Implementation Notes