diff options
Diffstat (limited to 'include/linux/sunrpc/auth.h')
| -rw-r--r-- | include/linux/sunrpc/auth.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h new file mode 100644 index 000000000000..04ebc24db348 --- /dev/null +++ b/include/linux/sunrpc/auth.h @@ -0,0 +1,149 @@ +/* + * 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 */ + 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) */ + 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 */ |