forked from luck/tmp_suning_uos_patched
24b2605bec
Various xdr encode routines use au_rslack to guess where the reply argument will end up, so we can set up the xdr_buf to recieve data into the right place for zero copy. Currently we calculate the au_rslack estimate when we check the verifier. Normally this only depends on the verifier size. In the integrity case we add a few bytes to allow for a length and sequence number. It's a bit simpler to calculate only the verifier size when we check the verifier, and delay the full calculation till we unwrap. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
155 lines
4.5 KiB
C
155 lines
4.5 KiB
C
/*
|
|
* 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;
|
|
struct group_info *group_info;
|
|
};
|
|
|
|
/*
|
|
* Client user credentials
|
|
*/
|
|
struct rpc_cred {
|
|
struct hlist_node cr_hash; /* hash chain */
|
|
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_MAGIC 0x0f4aa4f0
|
|
|
|
/*
|
|
* Client authentication handle
|
|
*/
|
|
#define RPC_CREDCACHE_NR 8
|
|
#define RPC_CREDCACHE_MASK (RPC_CREDCACHE_NR - 1)
|
|
struct rpc_cred_cache {
|
|
struct hlist_head hashtable[RPC_CREDCACHE_NR];
|
|
unsigned long nextgc; /* next garbage collection */
|
|
unsigned long expire; /* cache expiry interval */
|
|
};
|
|
|
|
struct rpc_auth {
|
|
unsigned int au_cslack; /* call cred size estimate */
|
|
/* guess at number of u32's auth adds before
|
|
* reply data; normally the verifier size: */
|
|
unsigned int au_rslack;
|
|
/* for gss, used to calculate au_rslack: */
|
|
unsigned int au_verfsize;
|
|
|
|
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) */
|
|
atomic_t au_count; /* Reference counter */
|
|
|
|
struct rpc_cred_cache * au_credcache;
|
|
/* 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 * (*lookup_cred)(struct rpc_auth *, struct auth_cred *, int);
|
|
struct rpc_cred * (*crcreate)(struct rpc_auth*, struct auth_cred *, int);
|
|
};
|
|
|
|
struct rpc_credops {
|
|
const char * cr_name; /* Name of the auth flavour */
|
|
void (*crdestroy)(struct rpc_cred *);
|
|
|
|
int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
|
|
u32 * (*crmarshal)(struct rpc_task *, u32 *);
|
|
int (*crrefresh)(struct rpc_task *);
|
|
u32 * (*crvalidate)(struct rpc_task *, u32 *);
|
|
int (*crwrap_req)(struct rpc_task *, kxdrproc_t,
|
|
void *, u32 *, void *);
|
|
int (*crunwrap_resp)(struct rpc_task *, kxdrproc_t,
|
|
void *, u32 *, void *);
|
|
};
|
|
|
|
extern struct rpc_authops authunix_ops;
|
|
extern struct rpc_authops authnull_ops;
|
|
#ifdef CONFIG_SUNRPC_SECURE
|
|
extern struct rpc_authops authdes_ops;
|
|
#endif
|
|
|
|
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_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, u32 *data, void *obj);
|
|
int rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, u32 *data, void *obj);
|
|
int rpcauth_refreshcred(struct rpc_task *);
|
|
void rpcauth_invalcred(struct rpc_task *);
|
|
int rpcauth_uptodatecred(struct rpc_task *);
|
|
int rpcauth_init_credcache(struct rpc_auth *, unsigned long);
|
|
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 */
|