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/*
* linux/include/linux/sunrpc/auth.h
*
* Declarations for the RPC client authentication machinery.
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#ifndef _LINUX_SUNRPC_AUTH_H
#define _LINUX_SUNRPC_AUTH_H
#ifdef __KERNEL__
#include <linux/config.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/xdr.h>
#include <asm/atomic.h>
/* size of the nodename buffer */
#define UNX_MAXNODENAME 32
/* Maximum size (in bytes) of an rpc credential or verifier */
#define RPC_MAX_AUTH_SIZE (400)
/* Work around the lack of a VFS credential */
struct auth_cred {
uid_t uid;
gid_t gid;
int ngroups;
gid_t *groups;
};
/*
* Client user credentials
*/
struct rpc_cred {
struct list_head cr_hash; /* hash chain */
struct rpc_auth * cr_auth;
struct rpc_credops * cr_ops;
unsigned long cr_expire; /* when to gc */
atomic_t cr_count; /* ref count */
unsigned short cr_flags; /* various flags */
#ifdef RPC_DEBUG
unsigned long cr_magic; /* 0x0f4aa4f0 */
#endif
uid_t cr_uid;
/* per-flavor data */
};
#define RPCAUTH_CRED_LOCKED 0x0001
#define RPCAUTH_CRED_UPTODATE 0x0002
#define RPCAUTH_CRED_DEAD 0x0004
#define RPCAUTH_CRED_MAGIC 0x0f4aa4f0
/*
* Client authentication handle
*/
#define RPC_CREDCACHE_NR 8
#define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1)
struct rpc_auth {
struct list_head au_credcache[RPC_CREDCACHE_NR];
unsigned long au_expire; /* cache expiry interval */
unsigned long au_nextgc; /* next garbage collection */
unsigned int au_cslack; /* call cred size estimate */
unsigned int au_rslack; /* reply verf size guess */
unsigned int au_flags; /* various flags */
struct rpc_authops * au_ops; /* operations */
rpc_authflavor_t au_flavor; /* pseudoflavor (note may
* differ from the flavor in
* au_ops->au_flavor in gss
* case) */
/* per-flavor data */
};
#define RPC_AUTH_PROC_CREDS 0x0010 /* process creds (including
* uid/gid, fs[ug]id, gids)
*/
/*
* Client authentication ops
*/
struct rpc_authops {
struct module *owner;
rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */
#ifdef RPC_DEBUG
char * au_name;
#endif
struct rpc_auth * (*create)(struct rpc_clnt *, rpc_authflavor_t);
void (*destroy)(struct rpc_auth *);
struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int);
};
struct rpc_credops {
void (*crdestroy)(struct rpc_cred *);
int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
u32 * (*crmarshal)(struct rpc_task *, u32 *, int);
int (*crrefresh)(struct rpc_task *);
u32 * (*crvalidate)(struct rpc_task *, u32 *);
};
extern struct rpc_authops authunix_ops;
extern struct rpc_authops authnull_ops;
#ifdef CONFIG_SUNRPC_SECURE
extern struct rpc_authops authdes_ops;
#endif
u32 pseudoflavor_to_flavor(rpc_authflavor_t);
int rpcauth_register(struct rpc_authops *);
int rpcauth_unregister(struct rpc_authops *);
struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
void rpcauth_destroy(struct rpc_auth *);
struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
struct rpc_cred * rpcauth_bindcred(struct rpc_task *);
void rpcauth_holdcred(struct rpc_task *);
void put_rpccred(struct rpc_cred *);
void rpcauth_unbindcred(struct rpc_task *);
u32 * rpcauth_marshcred(struct rpc_task *, u32 *);
u32 * rpcauth_checkverf(struct rpc_task *, u32 *);
int rpcauth_refreshcred(struct rpc_task *);
void rpcauth_invalcred(struct rpc_task *);
int rpcauth_uptodatecred(struct rpc_task *);
int rpcauth_deadcred(struct rpc_task *);
void rpcauth_init_credcache(struct rpc_auth *);
void rpcauth_free_credcache(struct rpc_auth *);
static inline
struct rpc_cred * get_rpccred(struct rpc_cred *cred)
{
atomic_inc(&cred->cr_count);
return cred;
}
#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_AUTH_H */