6a1a1e34dc
The gss_mech_list_pseudoflavors() function provides a list of currently registered GSS pseudoflavors. This list does not include any non-GSS flavors that have been registered with the RPC client. nfs4_find_root_sec() currently adds these extra flavors by hand. Instead, nfs4_find_root_sec() should be looking at the set of flavors that have been explicitly registered via rpcauth_register(). And, other areas of code will soon need the same kind of list that contains all flavors the kernel currently knows about (see below). Rather than cloning the open-coded logic in nfs4_find_root_sec() to those new places, introduce a generic RPC function that generates a full list of registered auth flavors and pseudoflavors. A new rpc_authops method is added that lists a flavor's pseudoflavors, if it has any. I encountered an interesting module loader loop when I tried to get the RPC client to invoke gss_mech_list_pseudoflavors() by name. This patch is a pre-requisite for server trunking discovery, and a pre-requisite for fixing up the in-kernel mount client to do better automatic security flavor selection. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
165 lines
5.1 KiB
C
165 lines
5.1 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/sunrpc/sched.h>
|
|
#include <linux/sunrpc/msg_prot.h>
|
|
#include <linux/sunrpc/xdr.h>
|
|
|
|
#include <linux/atomic.h>
|
|
#include <linux/rcupdate.h>
|
|
|
|
/* size of the nodename buffer */
|
|
#define UNX_MAXNODENAME 32
|
|
|
|
/* Work around the lack of a VFS credential */
|
|
struct auth_cred {
|
|
uid_t uid;
|
|
gid_t gid;
|
|
struct group_info *group_info;
|
|
const char *principal;
|
|
unsigned char machine_cred : 1;
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
#ifdef RPC_DEBUG
|
|
unsigned long cr_magic; /* 0x0f4aa4f0 */
|
|
#endif
|
|
unsigned long cr_expire; /* when to gc */
|
|
unsigned long cr_flags; /* various flags */
|
|
atomic_t cr_count; /* ref count */
|
|
|
|
uid_t cr_uid;
|
|
|
|
/* per-flavor data */
|
|
};
|
|
#define RPCAUTH_CRED_NEW 0
|
|
#define RPCAUTH_CRED_UPTODATE 1
|
|
#define RPCAUTH_CRED_HASHED 2
|
|
#define RPCAUTH_CRED_NEGATIVE 3
|
|
|
|
#define RPCAUTH_CRED_MAGIC 0x0f4aa4f0
|
|
|
|
/*
|
|
* Client authentication handle
|
|
*/
|
|
struct rpc_cred_cache;
|
|
struct rpc_authops;
|
|
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 */
|
|
const 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 */
|
|
};
|
|
|
|
/* Flags for rpcauth_lookupcred() */
|
|
#define RPCAUTH_LOOKUP_NEW 0x01 /* Accept an uninitialised cred */
|
|
|
|
/*
|
|
* Client authentication ops
|
|
*/
|
|
struct rpc_authops {
|
|
struct module *owner;
|
|
rpc_authflavor_t au_flavor; /* flavor (RPC_AUTH_*) */
|
|
char * au_name;
|
|
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);
|
|
int (*pipes_create)(struct rpc_auth *);
|
|
void (*pipes_destroy)(struct rpc_auth *);
|
|
int (*list_pseudoflavors)(rpc_authflavor_t *, int);
|
|
};
|
|
|
|
struct rpc_credops {
|
|
const char * cr_name; /* Name of the auth flavour */
|
|
int (*cr_init)(struct rpc_auth *, struct rpc_cred *);
|
|
void (*crdestroy)(struct rpc_cred *);
|
|
|
|
int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
|
|
struct rpc_cred * (*crbind)(struct rpc_task *, struct rpc_cred *, int);
|
|
__be32 * (*crmarshal)(struct rpc_task *, __be32 *);
|
|
int (*crrefresh)(struct rpc_task *);
|
|
__be32 * (*crvalidate)(struct rpc_task *, __be32 *);
|
|
int (*crwrap_req)(struct rpc_task *, kxdreproc_t,
|
|
void *, __be32 *, void *);
|
|
int (*crunwrap_resp)(struct rpc_task *, kxdrdproc_t,
|
|
void *, __be32 *, void *);
|
|
};
|
|
|
|
extern const struct rpc_authops authunix_ops;
|
|
extern const struct rpc_authops authnull_ops;
|
|
|
|
int __init rpc_init_authunix(void);
|
|
int __init rpc_init_generic_auth(void);
|
|
int __init rpcauth_init_module(void);
|
|
void rpcauth_remove_module(void);
|
|
void rpc_destroy_generic_auth(void);
|
|
void rpc_destroy_authunix(void);
|
|
|
|
struct rpc_cred * rpc_lookup_cred(void);
|
|
struct rpc_cred * rpc_lookup_machine_cred(const char *service_name);
|
|
int rpcauth_register(const struct rpc_authops *);
|
|
int rpcauth_unregister(const struct rpc_authops *);
|
|
struct rpc_auth * rpcauth_create(rpc_authflavor_t, struct rpc_clnt *);
|
|
void rpcauth_release(struct rpc_auth *);
|
|
int rpcauth_list_flavors(rpc_authflavor_t *, int);
|
|
struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred *, int);
|
|
void rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *);
|
|
struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
|
|
struct rpc_cred * rpcauth_generic_bind_cred(struct rpc_task *, struct rpc_cred *, int);
|
|
void put_rpccred(struct rpc_cred *);
|
|
__be32 * rpcauth_marshcred(struct rpc_task *, __be32 *);
|
|
__be32 * rpcauth_checkverf(struct rpc_task *, __be32 *);
|
|
int rpcauth_wrap_req(struct rpc_task *task, kxdreproc_t encode, void *rqstp, __be32 *data, void *obj);
|
|
int rpcauth_unwrap_resp(struct rpc_task *task, kxdrdproc_t decode, void *rqstp, __be32 *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 *);
|
|
void rpcauth_destroy_credcache(struct rpc_auth *);
|
|
void rpcauth_clear_credcache(struct rpc_cred_cache *);
|
|
|
|
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 */
|