2005-04-16 16:20:36 -06:00
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/*
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* linux/net/sunrpc/auth.c
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*
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* Generic RPC client authentication API.
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*
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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2008-03-12 12:40:14 -06:00
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#include <linux/hash.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/sunrpc/clnt.h>
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#include <linux/spinlock.h>
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#ifdef RPC_DEBUG
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# define RPCDBG_FACILITY RPCDBG_AUTH
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#endif
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2007-06-09 14:15:46 -06:00
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static DEFINE_SPINLOCK(rpc_authflavor_lock);
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2007-06-23 18:17:58 -06:00
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static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = {
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2005-04-16 16:20:36 -06:00
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&authnull_ops, /* AUTH_NULL */
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&authunix_ops, /* AUTH_UNIX */
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NULL, /* others can be loadable modules */
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};
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2007-06-23 17:45:36 -06:00
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static LIST_HEAD(cred_unused);
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2007-06-25 15:11:20 -06:00
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static unsigned long number_cred_unused;
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2007-06-23 17:45:36 -06:00
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2005-04-16 16:20:36 -06:00
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static u32
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pseudoflavor_to_flavor(u32 flavor) {
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if (flavor >= RPC_AUTH_MAXFLAVOR)
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return RPC_AUTH_GSS;
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return flavor;
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}
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int
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2007-06-23 18:17:58 -06:00
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rpcauth_register(const struct rpc_authops *ops)
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2005-04-16 16:20:36 -06:00
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{
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rpc_authflavor_t flavor;
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2007-06-09 14:15:46 -06:00
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int ret = -EPERM;
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2005-04-16 16:20:36 -06:00
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if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
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return -EINVAL;
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2007-06-09 14:15:46 -06:00
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spin_lock(&rpc_authflavor_lock);
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if (auth_flavors[flavor] == NULL) {
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auth_flavors[flavor] = ops;
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ret = 0;
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}
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spin_unlock(&rpc_authflavor_lock);
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return ret;
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2005-04-16 16:20:36 -06:00
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}
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2007-07-14 13:39:59 -06:00
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EXPORT_SYMBOL_GPL(rpcauth_register);
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2005-04-16 16:20:36 -06:00
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int
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2007-06-23 18:17:58 -06:00
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rpcauth_unregister(const struct rpc_authops *ops)
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2005-04-16 16:20:36 -06:00
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{
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rpc_authflavor_t flavor;
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2007-06-09 14:15:46 -06:00
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int ret = -EPERM;
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2005-04-16 16:20:36 -06:00
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if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
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return -EINVAL;
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2007-06-09 14:15:46 -06:00
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spin_lock(&rpc_authflavor_lock);
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if (auth_flavors[flavor] == ops) {
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auth_flavors[flavor] = NULL;
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ret = 0;
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}
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spin_unlock(&rpc_authflavor_lock);
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return ret;
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2005-04-16 16:20:36 -06:00
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}
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2007-07-14 13:39:59 -06:00
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EXPORT_SYMBOL_GPL(rpcauth_unregister);
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2005-04-16 16:20:36 -06:00
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struct rpc_auth *
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rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt)
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{
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struct rpc_auth *auth;
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2007-06-23 18:17:58 -06:00
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const struct rpc_authops *ops;
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2005-04-16 16:20:36 -06:00
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u32 flavor = pseudoflavor_to_flavor(pseudoflavor);
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2006-03-20 11:44:08 -07:00
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auth = ERR_PTR(-EINVAL);
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if (flavor >= RPC_AUTH_MAXFLAVOR)
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goto out;
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if ((ops = auth_flavors[flavor]) == NULL)
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request_module("rpc-auth-%u", flavor);
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2007-06-09 14:15:46 -06:00
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spin_lock(&rpc_authflavor_lock);
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ops = auth_flavors[flavor];
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if (ops == NULL || !try_module_get(ops->owner)) {
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spin_unlock(&rpc_authflavor_lock);
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2006-03-20 11:44:08 -07:00
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goto out;
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2007-06-09 14:15:46 -06:00
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}
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spin_unlock(&rpc_authflavor_lock);
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2005-04-16 16:20:36 -06:00
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auth = ops->create(clnt, pseudoflavor);
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2007-06-09 14:15:46 -06:00
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module_put(ops->owner);
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2005-06-22 11:16:23 -06:00
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if (IS_ERR(auth))
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return auth;
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2005-04-16 16:20:36 -06:00
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if (clnt->cl_auth)
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2007-06-23 08:46:47 -06:00
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rpcauth_release(clnt->cl_auth);
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2005-04-16 16:20:36 -06:00
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clnt->cl_auth = auth;
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2006-03-20 11:44:08 -07:00
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out:
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2005-04-16 16:20:36 -06:00
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return auth;
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}
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2007-07-14 13:39:59 -06:00
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EXPORT_SYMBOL_GPL(rpcauth_create);
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2005-04-16 16:20:36 -06:00
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void
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2007-06-23 08:46:47 -06:00
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rpcauth_release(struct rpc_auth *auth)
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2005-04-16 16:20:36 -06:00
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{
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if (!atomic_dec_and_test(&auth->au_count))
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return;
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auth->au_ops->destroy(auth);
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}
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static DEFINE_SPINLOCK(rpc_credcache_lock);
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2007-06-24 13:55:26 -06:00
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static void
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rpcauth_unhash_cred_locked(struct rpc_cred *cred)
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{
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hlist_del_rcu(&cred->cr_hash);
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smp_mb__before_clear_bit();
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clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags);
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}
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2009-12-03 06:10:17 -07:00
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static int
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2007-06-24 13:57:57 -06:00
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rpcauth_unhash_cred(struct rpc_cred *cred)
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{
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spinlock_t *cache_lock;
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2009-12-03 06:10:17 -07:00
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int ret;
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2007-06-24 13:57:57 -06:00
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cache_lock = &cred->cr_auth->au_credcache->lock;
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spin_lock(cache_lock);
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2009-12-03 06:10:17 -07:00
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ret = atomic_read(&cred->cr_count) == 0;
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if (ret)
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2007-06-24 13:57:57 -06:00
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rpcauth_unhash_cred_locked(cred);
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spin_unlock(cache_lock);
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2009-12-03 06:10:17 -07:00
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return ret;
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2007-06-24 13:57:57 -06:00
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}
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2005-04-16 16:20:36 -06:00
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/*
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* Initialize RPC credential cache
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*/
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int
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2007-06-25 15:11:20 -06:00
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rpcauth_init_credcache(struct rpc_auth *auth)
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2005-04-16 16:20:36 -06:00
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{
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struct rpc_cred_cache *new;
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int i;
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2006-01-11 16:56:43 -07:00
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new = kmalloc(sizeof(*new), GFP_KERNEL);
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2005-04-16 16:20:36 -06:00
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if (!new)
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return -ENOMEM;
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for (i = 0; i < RPC_CREDCACHE_NR; i++)
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INIT_HLIST_HEAD(&new->hashtable[i]);
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2007-06-24 13:57:57 -06:00
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spin_lock_init(&new->lock);
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2005-04-16 16:20:36 -06:00
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auth->au_credcache = new;
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return 0;
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}
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2007-07-14 13:39:59 -06:00
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EXPORT_SYMBOL_GPL(rpcauth_init_credcache);
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2005-04-16 16:20:36 -06:00
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/*
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* Destroy a list of credentials
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*/
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static inline
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2007-06-23 17:45:36 -06:00
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void rpcauth_destroy_credlist(struct list_head *head)
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2005-04-16 16:20:36 -06:00
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{
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struct rpc_cred *cred;
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2007-06-23 17:45:36 -06:00
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while (!list_empty(head)) {
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cred = list_entry(head->next, struct rpc_cred, cr_lru);
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list_del_init(&cred->cr_lru);
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2005-04-16 16:20:36 -06:00
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put_rpccred(cred);
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}
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}
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/*
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* Clear the RPC credential cache, and delete those credentials
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* that are not referenced.
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*/
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void
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2007-06-09 13:41:42 -06:00
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rpcauth_clear_credcache(struct rpc_cred_cache *cache)
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2005-04-16 16:20:36 -06:00
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{
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2007-06-23 17:45:36 -06:00
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LIST_HEAD(free);
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struct hlist_head *head;
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2005-04-16 16:20:36 -06:00
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struct rpc_cred *cred;
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int i;
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spin_lock(&rpc_credcache_lock);
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2007-06-24 13:57:57 -06:00
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spin_lock(&cache->lock);
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2005-04-16 16:20:36 -06:00
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for (i = 0; i < RPC_CREDCACHE_NR; i++) {
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2007-06-23 17:45:36 -06:00
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head = &cache->hashtable[i];
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while (!hlist_empty(head)) {
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cred = hlist_entry(head->first, struct rpc_cred, cr_hash);
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get_rpccred(cred);
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2007-06-25 15:11:20 -06:00
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if (!list_empty(&cred->cr_lru)) {
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list_del(&cred->cr_lru);
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number_cred_unused--;
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}
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list_add_tail(&cred->cr_lru, &free);
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2007-06-24 13:55:26 -06:00
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rpcauth_unhash_cred_locked(cred);
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2005-04-16 16:20:36 -06:00
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}
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}
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2007-06-24 13:57:57 -06:00
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spin_unlock(&cache->lock);
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2005-04-16 16:20:36 -06:00
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spin_unlock(&rpc_credcache_lock);
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rpcauth_destroy_credlist(&free);
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}
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2007-06-09 13:41:42 -06:00
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/*
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* Destroy the RPC credential cache
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*/
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void
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rpcauth_destroy_credcache(struct rpc_auth *auth)
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{
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struct rpc_cred_cache *cache = auth->au_credcache;
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if (cache) {
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auth->au_credcache = NULL;
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rpcauth_clear_credcache(cache);
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kfree(cache);
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}
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}
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2007-07-14 13:39:59 -06:00
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EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache);
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2007-06-09 13:41:42 -06:00
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2008-04-14 16:13:37 -06:00
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#define RPC_AUTH_EXPIRY_MORATORIUM (60 * HZ)
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2007-06-23 17:45:36 -06:00
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/*
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* Remove stale credentials. Avoid sleeping inside the loop.
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*/
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2007-06-25 15:11:20 -06:00
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static int
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rpcauth_prune_expired(struct list_head *free, int nr_to_scan)
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2005-04-16 16:20:36 -06:00
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{
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2007-06-24 13:57:57 -06:00
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spinlock_t *cache_lock;
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2008-10-28 13:21:41 -06:00
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struct rpc_cred *cred, *next;
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2008-04-14 16:13:37 -06:00
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unsigned long expired = jiffies - RPC_AUTH_EXPIRY_MORATORIUM;
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2007-06-23 17:45:36 -06:00
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2008-10-28 13:21:41 -06:00
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list_for_each_entry_safe(cred, next, &cred_unused, cr_lru) {
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/* Enforce a 60 second garbage collection moratorium */
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optimize attribute timeouts for "noac" and "actimeo=0"
Hi.
I've been looking at a bugzilla which describes a problem where
a customer was advised to use either the "noac" or "actimeo=0"
mount options to solve a consistency problem that they were
seeing in the file attributes. It turned out that this solution
did not work reliably for them because sometimes, the local
attribute cache was believed to be valid and not timed out.
(With an attribute cache timeout of 0, the cache should always
appear to be timed out.)
In looking at this situation, it appears to me that the problem
is that the attribute cache timeout code has an off-by-one
error in it. It is assuming that the cache is valid in the
region, [read_cache_jiffies, read_cache_jiffies + attrtimeo]. The
cache should be considered valid only in the region,
[read_cache_jiffies, read_cache_jiffies + attrtimeo). With this
change, the options, "noac" and "actimeo=0", work as originally
expected.
This problem was previously addressed by special casing the
attrtimeo == 0 case. However, since the problem is only an off-
by-one error, the cleaner solution is address the off-by-one
error and thus, not require the special case.
Thanx...
ps
Signed-off-by: Peter Staubach <staubach@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-12-23 13:21:56 -07:00
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if (time_in_range_open(cred->cr_expire, expired, jiffies) &&
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2008-10-28 13:21:41 -06:00
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test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0)
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continue;
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2007-06-23 17:45:36 -06:00
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list_del_init(&cred->cr_lru);
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2007-06-25 15:11:20 -06:00
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number_cred_unused--;
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2007-06-23 17:45:36 -06:00
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if (atomic_read(&cred->cr_count) != 0)
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continue;
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2008-10-28 13:21:41 -06:00
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2007-06-24 13:57:57 -06:00
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cache_lock = &cred->cr_auth->au_credcache->lock;
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spin_lock(cache_lock);
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if (atomic_read(&cred->cr_count) == 0) {
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get_rpccred(cred);
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list_add_tail(&cred->cr_lru, free);
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rpcauth_unhash_cred_locked(cred);
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2007-06-25 15:11:20 -06:00
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nr_to_scan--;
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2007-06-24 13:57:57 -06:00
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}
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spin_unlock(cache_lock);
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2007-06-25 15:11:20 -06:00
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if (nr_to_scan == 0)
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break;
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2005-04-16 16:20:36 -06:00
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}
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2007-06-25 15:11:20 -06:00
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return nr_to_scan;
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2005-04-16 16:20:36 -06:00
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}
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/*
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2007-06-25 15:11:20 -06:00
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* Run memory cache shrinker.
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2005-04-16 16:20:36 -06:00
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*/
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2007-06-25 15:11:20 -06:00
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static int
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rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
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2005-04-16 16:20:36 -06:00
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{
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2007-06-25 15:11:20 -06:00
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LIST_HEAD(free);
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int res;
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if (list_empty(&cred_unused))
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return 0;
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2007-06-24 13:55:26 -06:00
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spin_lock(&rpc_credcache_lock);
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2007-06-25 15:11:20 -06:00
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nr_to_scan = rpcauth_prune_expired(&free, nr_to_scan);
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res = (number_cred_unused / 100) * sysctl_vfs_cache_pressure;
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2007-06-24 13:55:26 -06:00
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spin_unlock(&rpc_credcache_lock);
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2007-06-25 15:11:20 -06:00
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rpcauth_destroy_credlist(&free);
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return res;
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2005-04-16 16:20:36 -06:00
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}
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|
|
/*
|
|
|
|
* Look up a process' credentials in the authentication cache
|
|
|
|
*/
|
|
|
|
struct rpc_cred *
|
|
|
|
rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred,
|
2006-02-01 10:18:36 -07:00
|
|
|
int flags)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-06-23 17:45:36 -06:00
|
|
|
LIST_HEAD(free);
|
2005-04-16 16:20:36 -06:00
|
|
|
struct rpc_cred_cache *cache = auth->au_credcache;
|
2007-06-23 17:45:36 -06:00
|
|
|
struct hlist_node *pos;
|
2007-06-24 13:55:26 -06:00
|
|
|
struct rpc_cred *cred = NULL,
|
|
|
|
*entry, *new;
|
2008-03-12 12:40:14 -06:00
|
|
|
unsigned int nr;
|
|
|
|
|
|
|
|
nr = hash_long(acred->uid, RPC_CREDCACHE_HASHBITS);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-24 13:55:26 -06:00
|
|
|
rcu_read_lock();
|
|
|
|
hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) {
|
2007-06-23 17:45:36 -06:00
|
|
|
if (!entry->cr_ops->crmatch(acred, entry, flags))
|
|
|
|
continue;
|
2007-06-24 13:57:57 -06:00
|
|
|
spin_lock(&cache->lock);
|
2007-06-24 13:55:26 -06:00
|
|
|
if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) {
|
2007-06-24 13:57:57 -06:00
|
|
|
spin_unlock(&cache->lock);
|
2007-06-24 13:55:26 -06:00
|
|
|
continue;
|
|
|
|
}
|
2007-06-23 17:45:36 -06:00
|
|
|
cred = get_rpccred(entry);
|
2007-06-24 13:57:57 -06:00
|
|
|
spin_unlock(&cache->lock);
|
2007-06-23 17:45:36 -06:00
|
|
|
break;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-06-24 13:55:26 -06:00
|
|
|
rcu_read_unlock();
|
|
|
|
|
2007-06-24 13:57:57 -06:00
|
|
|
if (cred != NULL)
|
2007-06-24 13:55:26 -06:00
|
|
|
goto found;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-24 13:55:26 -06:00
|
|
|
new = auth->au_ops->crcreate(auth, acred, flags);
|
|
|
|
if (IS_ERR(new)) {
|
|
|
|
cred = new;
|
|
|
|
goto out;
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-06-24 13:57:57 -06:00
|
|
|
spin_lock(&cache->lock);
|
2007-06-24 13:55:26 -06:00
|
|
|
hlist_for_each_entry(entry, pos, &cache->hashtable[nr], cr_hash) {
|
|
|
|
if (!entry->cr_ops->crmatch(acred, entry, flags))
|
|
|
|
continue;
|
|
|
|
cred = get_rpccred(entry);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (cred == NULL) {
|
2007-06-23 17:55:31 -06:00
|
|
|
cred = new;
|
2007-06-24 13:55:26 -06:00
|
|
|
set_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags);
|
|
|
|
hlist_add_head_rcu(&cred->cr_hash, &cache->hashtable[nr]);
|
|
|
|
} else
|
|
|
|
list_add_tail(&new->cr_lru, &free);
|
2007-06-24 13:57:57 -06:00
|
|
|
spin_unlock(&cache->lock);
|
2007-06-24 13:55:26 -06:00
|
|
|
found:
|
2009-11-29 17:55:45 -07:00
|
|
|
if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
|
|
|
|
cred->cr_ops->cr_init != NULL &&
|
|
|
|
!(flags & RPCAUTH_LOOKUP_NEW)) {
|
2006-02-01 10:19:27 -07:00
|
|
|
int res = cred->cr_ops->cr_init(auth, cred);
|
|
|
|
if (res < 0) {
|
|
|
|
put_rpccred(cred);
|
|
|
|
cred = ERR_PTR(res);
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-06-24 13:55:26 -06:00
|
|
|
rpcauth_destroy_credlist(&free);
|
|
|
|
out:
|
|
|
|
return cred;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-07-14 13:39:59 -06:00
|
|
|
EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
struct rpc_cred *
|
2006-02-01 10:18:36 -07:00
|
|
|
rpcauth_lookupcred(struct rpc_auth *auth, int flags)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2008-11-13 16:39:18 -07:00
|
|
|
struct auth_cred acred;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct rpc_cred *ret;
|
2008-11-13 16:39:18 -07:00
|
|
|
const struct cred *cred = current_cred();
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: looking up %s cred\n",
|
2005-04-16 16:20:36 -06:00
|
|
|
auth->au_ops->au_name);
|
2008-11-13 16:39:18 -07:00
|
|
|
|
|
|
|
memset(&acred, 0, sizeof(acred));
|
|
|
|
acred.uid = cred->fsuid;
|
|
|
|
acred.gid = cred->fsgid;
|
|
|
|
acred.group_info = get_group_info(((struct cred *)cred)->group_info);
|
|
|
|
|
2006-02-01 10:18:36 -07:00
|
|
|
ret = auth->au_ops->lookup_cred(auth, &acred, flags);
|
2005-04-16 16:20:36 -06:00
|
|
|
put_group_info(acred.group_info);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2007-06-23 17:55:31 -06:00
|
|
|
void
|
|
|
|
rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred,
|
|
|
|
struct rpc_auth *auth, const struct rpc_credops *ops)
|
|
|
|
{
|
|
|
|
INIT_HLIST_NODE(&cred->cr_hash);
|
2007-06-23 17:45:36 -06:00
|
|
|
INIT_LIST_HEAD(&cred->cr_lru);
|
2007-06-23 17:55:31 -06:00
|
|
|
atomic_set(&cred->cr_count, 1);
|
|
|
|
cred->cr_auth = auth;
|
|
|
|
cred->cr_ops = ops;
|
|
|
|
cred->cr_expire = jiffies;
|
|
|
|
#ifdef RPC_DEBUG
|
|
|
|
cred->cr_magic = RPCAUTH_CRED_MAGIC;
|
|
|
|
#endif
|
|
|
|
cred->cr_uid = acred->uid;
|
|
|
|
}
|
2007-07-14 13:39:59 -06:00
|
|
|
EXPORT_SYMBOL_GPL(rpcauth_init_cred);
|
2007-06-23 17:55:31 -06:00
|
|
|
|
2008-03-12 14:21:07 -06:00
|
|
|
void
|
2009-09-15 11:32:13 -06:00
|
|
|
rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags)
|
2008-03-12 14:20:55 -06:00
|
|
|
{
|
|
|
|
task->tk_msg.rpc_cred = get_rpccred(cred);
|
|
|
|
dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid,
|
|
|
|
cred->cr_auth->au_ops->au_name, cred);
|
|
|
|
}
|
2008-03-12 14:21:07 -06:00
|
|
|
EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred);
|
2008-03-12 14:20:55 -06:00
|
|
|
|
|
|
|
static void
|
2009-09-15 11:32:13 -06:00
|
|
|
rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-06-27 12:29:04 -06:00
|
|
|
struct rpc_auth *auth = task->tk_client->cl_auth;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct auth_cred acred = {
|
2008-03-12 10:12:16 -06:00
|
|
|
.uid = 0,
|
|
|
|
.gid = 0,
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
struct rpc_cred *ret;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u looking up %s cred\n",
|
2007-06-27 12:29:04 -06:00
|
|
|
task->tk_pid, task->tk_client->cl_auth->au_ops->au_name);
|
2009-09-15 11:32:13 -06:00
|
|
|
ret = auth->au_ops->lookup_cred(auth, &acred, lookupflags);
|
2008-03-12 10:12:16 -06:00
|
|
|
if (!IS_ERR(ret))
|
|
|
|
task->tk_msg.rpc_cred = ret;
|
|
|
|
else
|
|
|
|
task->tk_status = PTR_ERR(ret);
|
|
|
|
}
|
|
|
|
|
2008-03-12 14:20:55 -06:00
|
|
|
static void
|
2009-09-15 11:32:13 -06:00
|
|
|
rpcauth_bind_new_cred(struct rpc_task *task, int lookupflags)
|
2008-03-12 10:12:16 -06:00
|
|
|
{
|
|
|
|
struct rpc_auth *auth = task->tk_client->cl_auth;
|
|
|
|
struct rpc_cred *ret;
|
|
|
|
|
|
|
|
dprintk("RPC: %5u looking up %s cred\n",
|
|
|
|
task->tk_pid, auth->au_ops->au_name);
|
2009-09-15 11:32:13 -06:00
|
|
|
ret = rpcauth_lookupcred(auth, lookupflags);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!IS_ERR(ret))
|
|
|
|
task->tk_msg.rpc_cred = ret;
|
|
|
|
else
|
|
|
|
task->tk_status = PTR_ERR(ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2008-03-12 14:20:55 -06:00
|
|
|
rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2009-09-15 11:32:13 -06:00
|
|
|
int lookupflags = 0;
|
|
|
|
|
|
|
|
if (flags & RPC_TASK_ASYNC)
|
|
|
|
lookupflags |= RPCAUTH_LOOKUP_NEW;
|
2008-03-12 14:20:55 -06:00
|
|
|
if (cred != NULL)
|
2009-09-15 11:32:13 -06:00
|
|
|
cred->cr_ops->crbind(task, cred, lookupflags);
|
2008-03-12 14:20:55 -06:00
|
|
|
else if (flags & RPC_TASK_ROOTCREDS)
|
2009-09-15 11:32:13 -06:00
|
|
|
rpcauth_bind_root_cred(task, lookupflags);
|
2008-03-12 14:20:55 -06:00
|
|
|
else
|
2009-09-15 11:32:13 -06:00
|
|
|
rpcauth_bind_new_cred(task, lookupflags);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
put_rpccred(struct rpc_cred *cred)
|
|
|
|
{
|
2007-06-23 17:45:36 -06:00
|
|
|
/* Fast path for unhashed credentials */
|
2009-12-03 06:10:17 -07:00
|
|
|
if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) == 0) {
|
|
|
|
if (atomic_dec_and_test(&cred->cr_count))
|
|
|
|
cred->cr_ops->crdestroy(cred);
|
2005-04-16 16:20:36 -06:00
|
|
|
return;
|
2009-12-03 06:10:17 -07:00
|
|
|
}
|
|
|
|
|
2007-06-23 17:45:36 -06:00
|
|
|
if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock))
|
|
|
|
return;
|
2007-06-25 15:11:20 -06:00
|
|
|
if (!list_empty(&cred->cr_lru)) {
|
|
|
|
number_cred_unused--;
|
2007-06-23 17:45:36 -06:00
|
|
|
list_del_init(&cred->cr_lru);
|
2007-06-25 15:11:20 -06:00
|
|
|
}
|
2008-10-28 13:21:42 -06:00
|
|
|
if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) {
|
2009-12-03 06:10:17 -07:00
|
|
|
if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) {
|
|
|
|
cred->cr_expire = jiffies;
|
|
|
|
list_add_tail(&cred->cr_lru, &cred_unused);
|
|
|
|
number_cred_unused++;
|
|
|
|
goto out_nodestroy;
|
|
|
|
}
|
|
|
|
if (!rpcauth_unhash_cred(cred)) {
|
|
|
|
/* We were hashed and someone looked us up... */
|
|
|
|
goto out_nodestroy;
|
|
|
|
}
|
2007-06-23 17:45:36 -06:00
|
|
|
}
|
|
|
|
spin_unlock(&rpc_credcache_lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
cred->cr_ops->crdestroy(cred);
|
2009-12-03 06:10:17 -07:00
|
|
|
return;
|
|
|
|
out_nodestroy:
|
|
|
|
spin_unlock(&rpc_credcache_lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-07-14 13:39:59 -06:00
|
|
|
EXPORT_SYMBOL_GPL(put_rpccred);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
void
|
|
|
|
rpcauth_unbindcred(struct rpc_task *task)
|
|
|
|
{
|
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u releasing %s cred %p\n",
|
2007-06-27 12:29:04 -06:00
|
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
put_rpccred(cred);
|
|
|
|
task->tk_msg.rpc_cred = NULL;
|
|
|
|
}
|
|
|
|
|
2006-09-26 23:29:38 -06:00
|
|
|
__be32 *
|
|
|
|
rpcauth_marshcred(struct rpc_task *task, __be32 *p)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u marshaling %s cred %p\n",
|
2007-06-27 12:29:04 -06:00
|
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
2005-11-01 14:53:32 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
return cred->cr_ops->crmarshal(task, p);
|
|
|
|
}
|
|
|
|
|
2006-09-26 23:29:38 -06:00
|
|
|
__be32 *
|
|
|
|
rpcauth_checkverf(struct rpc_task *task, __be32 *p)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u validating %s cred %p\n",
|
2007-06-27 12:29:04 -06:00
|
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
2005-11-01 14:53:32 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
return cred->cr_ops->crvalidate(task, p);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp,
|
2006-09-26 23:29:38 -06:00
|
|
|
__be32 *data, void *obj)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u using %s cred %p to wrap rpc data\n",
|
2005-04-16 16:20:36 -06:00
|
|
|
task->tk_pid, cred->cr_ops->cr_name, cred);
|
|
|
|
if (cred->cr_ops->crwrap_req)
|
|
|
|
return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj);
|
|
|
|
/* By default, we encode the arguments normally. */
|
2008-12-23 13:21:31 -07:00
|
|
|
return encode(rqstp, data, obj);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp,
|
2006-09-26 23:29:38 -06:00
|
|
|
__be32 *data, void *obj)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n",
|
2005-04-16 16:20:36 -06:00
|
|
|
task->tk_pid, cred->cr_ops->cr_name, cred);
|
|
|
|
if (cred->cr_ops->crunwrap_resp)
|
|
|
|
return cred->cr_ops->crunwrap_resp(task, decode, rqstp,
|
|
|
|
data, obj);
|
|
|
|
/* By default, we decode the arguments normally. */
|
2008-12-23 13:21:31 -07:00
|
|
|
return decode(rqstp, data, obj);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
rpcauth_refreshcred(struct rpc_task *task)
|
|
|
|
{
|
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
int err;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u refreshing %s cred %p\n",
|
2007-06-27 12:29:04 -06:00
|
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
2005-11-01 14:53:32 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
err = cred->cr_ops->crrefresh(task);
|
|
|
|
if (err < 0)
|
|
|
|
task->tk_status = err;
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
rpcauth_invalcred(struct rpc_task *task)
|
|
|
|
{
|
2007-06-25 08:15:15 -06:00
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
|
2007-01-31 10:14:08 -07:00
|
|
|
dprintk("RPC: %5u invalidating %s cred %p\n",
|
2007-06-27 12:29:04 -06:00
|
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
2007-06-25 08:15:15 -06:00
|
|
|
if (cred)
|
|
|
|
clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
rpcauth_uptodatecred(struct rpc_task *task)
|
|
|
|
{
|
2007-06-25 08:15:15 -06:00
|
|
|
struct rpc_cred *cred = task->tk_msg.rpc_cred;
|
|
|
|
|
|
|
|
return cred == NULL ||
|
|
|
|
test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-06-25 15:11:20 -06:00
|
|
|
|
2007-07-17 05:03:17 -06:00
|
|
|
static struct shrinker rpc_cred_shrinker = {
|
|
|
|
.shrink = rpcauth_cache_shrinker,
|
|
|
|
.seeks = DEFAULT_SEEKS,
|
|
|
|
};
|
2007-06-25 15:11:20 -06:00
|
|
|
|
|
|
|
void __init rpcauth_init_module(void)
|
|
|
|
{
|
|
|
|
rpc_init_authunix();
|
2008-03-12 10:24:49 -06:00
|
|
|
rpc_init_generic_auth();
|
2007-07-17 05:03:17 -06:00
|
|
|
register_shrinker(&rpc_cred_shrinker);
|
2007-06-25 15:11:20 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void __exit rpcauth_remove_module(void)
|
|
|
|
{
|
2007-07-17 05:03:17 -06:00
|
|
|
unregister_shrinker(&rpc_cred_shrinker);
|
2007-06-25 15:11:20 -06:00
|
|
|
}
|