SUNRPC: Allow RPCs to fail quickly if the server is unreachable

[safe/jmp/linux-2.6] / include / linux / sunrpc / auth.h

diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index e606c28..996df4d 100644 (file)
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -16,6 +16,7 @@
 #include <linux/sunrpc/xdr.h>
 
 #include <asm/atomic.h>
+#include <linux/rcupdate.h>
 
 /* size of the nodename buffer */
 #define UNX_MAXNODENAME        32
@@ -25,6 +26,7 @@ struct auth_cred {
        uid_t   uid;
        gid_t   gid;
        struct group_info *group_info;
+       unsigned char machine_cred : 1;
 };
 
 /*
@@ -34,33 +36,35 @@ 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 */
-       atomic_t                cr_count;       /* ref count */
-       unsigned short          cr_flags;       /* various flags */
 #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       0x0001
-#define RPCAUTH_CRED_UPTODATE  0x0002
+#define RPCAUTH_CRED_NEW       0
+#define RPCAUTH_CRED_UPTODATE  1
+#define RPCAUTH_CRED_HASHED    2
 
 #define RPCAUTH_CRED_MAGIC     0x0f4aa4f0
 
 /*
  * Client authentication handle
  */
-#define RPC_CREDCACHE_NR       8
-#define RPC_CREDCACHE_MASK     (RPC_CREDCACHE_NR - 1)
+#define RPC_CREDCACHE_HASHBITS 4
+#define RPC_CREDCACHE_NR       (1 << RPC_CREDCACHE_HASHBITS)
 struct rpc_cred_cache {
        struct hlist_head       hashtable[RPC_CREDCACHE_NR];
-       unsigned long           nextgc;         /* next garbage collection */
-       unsigned long           expire;         /* cache expiry interval */
+       spinlock_t              lock;
 };
 
 struct rpc_authops;
@@ -86,7 +90,6 @@ struct rpc_auth {
 
 /* Flags for rpcauth_lookupcred() */
 #define RPCAUTH_LOOKUP_NEW             0x01    /* Accept an uninitialised cred */
-#define RPCAUTH_LOOKUP_ROOTCREDS       0x02    /* This really ought to go! */
 
 /*
  * Client authentication ops
@@ -94,9 +97,7 @@ struct rpc_auth {
 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 *);
 
@@ -110,6 +111,7 @@ struct rpc_credops {
        void                    (*crdestroy)(struct rpc_cred *);
 
        int                     (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
+       void                    (*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 *);
@@ -122,14 +124,23 @@ struct rpc_credops {
 extern const struct rpc_authops        authunix_ops;
 extern const struct rpc_authops        authnull_ops;
 
+void __init            rpc_init_authunix(void);
+void __init            rpc_init_generic_auth(void);
+void __init            rpcauth_init_module(void);
+void __exit            rpcauth_remove_module(void);
+void __exit            rpc_destroy_generic_auth(void);
+
+struct rpc_cred *      rpc_lookup_cred(void);
+struct rpc_cred *      rpc_lookup_machine_cred(void);
 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 *);
 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_bindcred(struct rpc_task *);
-void                   rpcauth_holdcred(struct rpc_task *);
+void                   rpcauth_bindcred(struct rpc_task *, struct rpc_cred *, int);
+void                   rpcauth_generic_bind_cred(struct rpc_task *, struct rpc_cred *, int);
 void                   put_rpccred(struct rpc_cred *);
 void                   rpcauth_unbindcred(struct rpc_task *);
 __be32 *               rpcauth_marshcred(struct rpc_task *, __be32 *);
@@ -139,7 +150,7 @@ int                 rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp,
 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);
+int                    rpcauth_init_credcache(struct rpc_auth *);
 void                   rpcauth_destroy_credcache(struct rpc_auth *);
 void                   rpcauth_clear_credcache(struct rpc_cred_cache *);