[deliverable/linux.git] / net / sunrpc / auth.c

/*
 * linux/net/sunrpc/auth.c
 *
 * Generic RPC client authentication API.
 *
 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/types.h>
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/sunrpc/clnt.h>
#include <linux/spinlock.h>

#ifdef RPC_DEBUG
# define RPCDBG_FACILITY	RPCDBG_AUTH
#endif

static struct rpc_authops *	auth_flavors[RPC_AUTH_MAXFLAVOR] = {
	&authnull_ops,		/* AUTH_NULL */
	&authunix_ops,		/* AUTH_UNIX */
	NULL,			/* others can be loadable modules */
};

static u32
pseudoflavor_to_flavor(u32 flavor) {
	if (flavor >= RPC_AUTH_MAXFLAVOR)
		return RPC_AUTH_GSS;
	return flavor;
}

int
rpcauth_register(struct rpc_authops *ops)
{
	rpc_authflavor_t flavor;

	if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
		return -EINVAL;
	if (auth_flavors[flavor] != NULL)
		return -EPERM;		/* what else? */
	auth_flavors[flavor] = ops;
	return 0;
}

int
rpcauth_unregister(struct rpc_authops *ops)
{
	rpc_authflavor_t flavor;

	if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
		return -EINVAL;
	if (auth_flavors[flavor] != ops)
		return -EPERM;		/* what else? */
	auth_flavors[flavor] = NULL;
	return 0;
}

struct rpc_auth *
rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt)
{
	struct rpc_auth		*auth;
	struct rpc_authops	*ops;
	u32			flavor = pseudoflavor_to_flavor(pseudoflavor);

	if (flavor >= RPC_AUTH_MAXFLAVOR || !(ops = auth_flavors[flavor]))
		return ERR_PTR(-EINVAL);
	auth = ops->create(clnt, pseudoflavor);
	if (IS_ERR(auth))
		return auth;
	if (clnt->cl_auth)
		rpcauth_destroy(clnt->cl_auth);
	clnt->cl_auth = auth;
	return auth;
}

void
rpcauth_destroy(struct rpc_auth *auth)
{
	if (!atomic_dec_and_test(&auth->au_count))
		return;
	auth->au_ops->destroy(auth);
}

static DEFINE_SPINLOCK(rpc_credcache_lock);

/*
 * Initialize RPC credential cache
 */
int
rpcauth_init_credcache(struct rpc_auth *auth, unsigned long expire)
{
	struct rpc_cred_cache *new;
	int i;

	new = (struct rpc_cred_cache *)kmalloc(sizeof(*new), GFP_KERNEL);
	if (!new)
		return -ENOMEM;
	for (i = 0; i < RPC_CREDCACHE_NR; i++)
		INIT_HLIST_HEAD(&new->hashtable[i]);
	new->expire = expire;
	new->nextgc = jiffies + (expire >> 1);
	auth->au_credcache = new;
	return 0;
}

/*
 * Destroy a list of credentials
 */
static inline
void rpcauth_destroy_credlist(struct hlist_head *head)
{
	struct rpc_cred *cred;

	while (!hlist_empty(head)) {
		cred = hlist_entry(head->first, struct rpc_cred, cr_hash);
		hlist_del_init(&cred->cr_hash);
		put_rpccred(cred);
	}
}

/*
 * Clear the RPC credential cache, and delete those credentials
 * that are not referenced.
 */
void
rpcauth_free_credcache(struct rpc_auth *auth)
{
	struct rpc_cred_cache *cache = auth->au_credcache;
	HLIST_HEAD(free);
	struct hlist_node *pos, *next;
	struct rpc_cred	*cred;
	int		i;

	spin_lock(&rpc_credcache_lock);
	for (i = 0; i < RPC_CREDCACHE_NR; i++) {
		hlist_for_each_safe(pos, next, &cache->hashtable[i]) {
			cred = hlist_entry(pos, struct rpc_cred, cr_hash);
			__hlist_del(&cred->cr_hash);
			hlist_add_head(&cred->cr_hash, &free);
		}
	}
	spin_unlock(&rpc_credcache_lock);
	rpcauth_destroy_credlist(&free);
}

static void
rpcauth_prune_expired(struct rpc_auth *auth, struct rpc_cred *cred, struct hlist_head *free)
{
	if (atomic_read(&cred->cr_count) != 1)
	       return;
	if (time_after(jiffies, cred->cr_expire + auth->au_credcache->expire))
		cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
	if (!(cred->cr_flags & RPCAUTH_CRED_UPTODATE)) {
		__hlist_del(&cred->cr_hash);
		hlist_add_head(&cred->cr_hash, free);
	}
}

/*
 * Remove stale credentials. Avoid sleeping inside the loop.
 */
static void
rpcauth_gc_credcache(struct rpc_auth *auth, struct hlist_head *free)
{
	struct rpc_cred_cache *cache = auth->au_credcache;
	struct hlist_node *pos, *next;
	struct rpc_cred	*cred;
	int		i;

	dprintk("RPC: gc'ing RPC credentials for auth %p\n", auth);
	for (i = 0; i < RPC_CREDCACHE_NR; i++) {
		hlist_for_each_safe(pos, next, &cache->hashtable[i]) {
			cred = hlist_entry(pos, struct rpc_cred, cr_hash);
			rpcauth_prune_expired(auth, cred, free);
		}
	}
	cache->nextgc = jiffies + cache->expire;
}

/*
 * Look up a process' credentials in the authentication cache
 */
struct rpc_cred *
rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred,
		int taskflags)
{
	struct rpc_cred_cache *cache = auth->au_credcache;
	HLIST_HEAD(free);
	struct hlist_node *pos, *next;
	struct rpc_cred	*new = NULL,
			*cred = NULL;
	int		nr = 0;

	if (!(taskflags & RPC_TASK_ROOTCREDS))
		nr = acred->uid & RPC_CREDCACHE_MASK;
retry:
	spin_lock(&rpc_credcache_lock);
	if (time_before(cache->nextgc, jiffies))
		rpcauth_gc_credcache(auth, &free);
	hlist_for_each_safe(pos, next, &cache->hashtable[nr]) {
		struct rpc_cred *entry;
	       	entry = hlist_entry(pos, struct rpc_cred, cr_hash);
		if (entry->cr_ops->crmatch(acred, entry, taskflags)) {
			hlist_del(&entry->cr_hash);
			cred = entry;
			break;
		}
		rpcauth_prune_expired(auth, entry, &free);
	}
	if (new) {
		if (cred)
			hlist_add_head(&new->cr_hash, &free);
		else
			cred = new;
	}
	if (cred) {
		hlist_add_head(&cred->cr_hash, &cache->hashtable[nr]);
		get_rpccred(cred);
	}
	spin_unlock(&rpc_credcache_lock);

	rpcauth_destroy_credlist(&free);

	if (!cred) {
		new = auth->au_ops->crcreate(auth, acred, taskflags);
		if (!IS_ERR(new)) {
#ifdef RPC_DEBUG
			new->cr_magic = RPCAUTH_CRED_MAGIC;
#endif
			goto retry;
		} else
			cred = new;
	}

	return (struct rpc_cred *) cred;
}

struct rpc_cred *
rpcauth_lookupcred(struct rpc_auth *auth, int taskflags)
{
	struct auth_cred acred = {
		.uid = current->fsuid,
		.gid = current->fsgid,
		.group_info = current->group_info,
	};
	struct rpc_cred *ret;

	dprintk("RPC:     looking up %s cred\n",
		auth->au_ops->au_name);
	get_group_info(acred.group_info);
	ret = auth->au_ops->lookup_cred(auth, &acred, taskflags);
	put_group_info(acred.group_info);
	return ret;
}

struct rpc_cred *
rpcauth_bindcred(struct rpc_task *task)
{
	struct rpc_auth *auth = task->tk_auth;
	struct auth_cred acred = {
		.uid = current->fsuid,
		.gid = current->fsgid,
		.group_info = current->group_info,
	};
	struct rpc_cred *ret;

	dprintk("RPC: %4d looking up %s cred\n",
		task->tk_pid, task->tk_auth->au_ops->au_name);
	get_group_info(acred.group_info);
	ret = auth->au_ops->lookup_cred(auth, &acred, task->tk_flags);
	if (!IS_ERR(ret))
		task->tk_msg.rpc_cred = ret;
	else
		task->tk_status = PTR_ERR(ret);
	put_group_info(acred.group_info);
	return ret;
}

void
rpcauth_holdcred(struct rpc_task *task)
{
	dprintk("RPC: %4d holding %s cred %p\n",
		task->tk_pid, task->tk_auth->au_ops->au_name, task->tk_msg.rpc_cred);
	if (task->tk_msg.rpc_cred)
		get_rpccred(task->tk_msg.rpc_cred);
}

void
put_rpccred(struct rpc_cred *cred)
{
	cred->cr_expire = jiffies;
	if (!atomic_dec_and_test(&cred->cr_count))
		return;
	cred->cr_ops->crdestroy(cred);
}

void
rpcauth_unbindcred(struct rpc_task *task)
{
	struct rpc_cred	*cred = task->tk_msg.rpc_cred;

	dprintk("RPC: %4d releasing %s cred %p\n",
		task->tk_pid, task->tk_auth->au_ops->au_name, cred);

	put_rpccred(cred);
	task->tk_msg.rpc_cred = NULL;
}

u32 *
rpcauth_marshcred(struct rpc_task *task, u32 *p)
{
	struct rpc_cred	*cred = task->tk_msg.rpc_cred;

	dprintk("RPC: %4d marshaling %s cred %p\n",
		task->tk_pid, task->tk_auth->au_ops->au_name, cred);

	return cred->cr_ops->crmarshal(task, p);
}

u32 *
rpcauth_checkverf(struct rpc_task *task, u32 *p)
{
	struct rpc_cred	*cred = task->tk_msg.rpc_cred;

	dprintk("RPC: %4d validating %s cred %p\n",
		task->tk_pid, task->tk_auth->au_ops->au_name, cred);

	return cred->cr_ops->crvalidate(task, p);
}

int
rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp,
		u32 *data, void *obj)
{
	struct rpc_cred *cred = task->tk_msg.rpc_cred;

	dprintk("RPC: %4d using %s cred %p to wrap rpc data\n",
			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. */
	return encode(rqstp, data, obj);
}

int
rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp,
		u32 *data, void *obj)
{
	struct rpc_cred *cred = task->tk_msg.rpc_cred;

	dprintk("RPC: %4d using %s cred %p to unwrap rpc data\n",
			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. */
	return decode(rqstp, data, obj);
}

int
rpcauth_refreshcred(struct rpc_task *task)
{
	struct rpc_cred	*cred = task->tk_msg.rpc_cred;
	int err;

	dprintk("RPC: %4d refreshing %s cred %p\n",
		task->tk_pid, task->tk_auth->au_ops->au_name, cred);

	err = cred->cr_ops->crrefresh(task);
	if (err < 0)
		task->tk_status = err;
	return err;
}

void
rpcauth_invalcred(struct rpc_task *task)
{
	dprintk("RPC: %4d invalidating %s cred %p\n",
		task->tk_pid, task->tk_auth->au_ops->au_name, task->tk_msg.rpc_cred);
	spin_lock(&rpc_credcache_lock);
	if (task->tk_msg.rpc_cred)
		task->tk_msg.rpc_cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
	spin_unlock(&rpc_credcache_lock);
}

int
rpcauth_uptodatecred(struct rpc_task *task)
{
	return !(task->tk_msg.rpc_cred) ||
		(task->tk_msg.rpc_cred->cr_flags & RPCAUTH_CRED_UPTODATE);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/net/sunrpc/auth.c
	3	*
	4	* Generic RPC client authentication API.
	5	*
	6	* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9	#include <linux/types.h>
	10	#include <linux/sched.h>
	11	#include <linux/module.h>
	12	#include <linux/slab.h>
	13	#include <linux/errno.h>
1da177e4 LT	14	#include <linux/sunrpc/clnt.h>
	15	#include <linux/spinlock.h>
	16
	17	#ifdef RPC_DEBUG
	18	# define RPCDBG_FACILITY RPCDBG_AUTH
	19	#endif
	20
	21	static struct rpc_authops * auth_flavors[RPC_AUTH_MAXFLAVOR] = {
	22	&authnull_ops, /* AUTH_NULL */
	23	&authunix_ops, /* AUTH_UNIX */
	24	NULL, /* others can be loadable modules */
	25	};
	26
	27	static u32
	28	pseudoflavor_to_flavor(u32 flavor) {
	29	if (flavor >= RPC_AUTH_MAXFLAVOR)
	30	return RPC_AUTH_GSS;
	31	return flavor;
	32	}
	33
	34	int
	35	rpcauth_register(struct rpc_authops *ops)
	36	{
	37	rpc_authflavor_t flavor;
	38
	39	if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
	40	return -EINVAL;
	41	if (auth_flavors[flavor] != NULL)
	42	return -EPERM; /* what else? */
	43	auth_flavors[flavor] = ops;
	44	return 0;
	45	}
	46
	47	int
	48	rpcauth_unregister(struct rpc_authops *ops)
	49	{
	50	rpc_authflavor_t flavor;
	51
	52	if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
	53	return -EINVAL;
	54	if (auth_flavors[flavor] != ops)
	55	return -EPERM; /* what else? */
	56	auth_flavors[flavor] = NULL;
	57	return 0;
	58	}
	59
	60	struct rpc_auth *
	61	rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt)
	62	{
	63	struct rpc_auth *auth;
	64	struct rpc_authops *ops;
	65	u32 flavor = pseudoflavor_to_flavor(pseudoflavor);
	66
	67	if (flavor >= RPC_AUTH_MAXFLAVOR \|\| !(ops = auth_flavors[flavor]))
6a19275a	68	return ERR_PTR(-EINVAL);
1da177e4	69	auth = ops->create(clnt, pseudoflavor);
6a19275a BF	70	if (IS_ERR(auth))
6a19275a BF	71	return auth;
1da177e4 LT	72	if (clnt->cl_auth)
	73	rpcauth_destroy(clnt->cl_auth);
	74	clnt->cl_auth = auth;
	75	return auth;
	76	}
	77
	78	void
	79	rpcauth_destroy(struct rpc_auth *auth)
	80	{
	81	if (!atomic_dec_and_test(&auth->au_count))
	82	return;
	83	auth->au_ops->destroy(auth);
	84	}
	85
	86	static DEFINE_SPINLOCK(rpc_credcache_lock);
	87
	88	/*
	89	* Initialize RPC credential cache
	90	*/
	91	int
	92	rpcauth_init_credcache(struct rpc_auth *auth, unsigned long expire)
	93	{
	94	struct rpc_cred_cache *new;
	95	int i;
	96
	97	new = (struct rpc_cred_cache )kmalloc(sizeof(new), GFP_KERNEL);
	98	if (!new)
	99	return -ENOMEM;
	100	for (i = 0; i < RPC_CREDCACHE_NR; i++)
	101	INIT_HLIST_HEAD(&new->hashtable[i]);
	102	new->expire = expire;
	103	new->nextgc = jiffies + (expire >> 1);
	104	auth->au_credcache = new;
	105	return 0;
	106	}
	107
	108	/*
	109	* Destroy a list of credentials
	110	*/
	111	static inline
	112	void rpcauth_destroy_credlist(struct hlist_head *head)
	113	{
	114	struct rpc_cred *cred;
	115
	116	while (!hlist_empty(head)) {
	117	cred = hlist_entry(head->first, struct rpc_cred, cr_hash);
	118	hlist_del_init(&cred->cr_hash);
	119	put_rpccred(cred);
	120	}
	121	}
	122
	123	/*
	124	* Clear the RPC credential cache, and delete those credentials
	125	* that are not referenced.
	126	*/
	127	void
	128	rpcauth_free_credcache(struct rpc_auth *auth)
	129	{
	130	struct rpc_cred_cache *cache = auth->au_credcache;
	131	HLIST_HEAD(free);
	132	struct hlist_node pos, next;
	133	struct rpc_cred *cred;
	134	int i;
	135
136	spin_lock(&rpc_credcache_lock);
137	for (i = 0; i < RPC_CREDCACHE_NR; i++) {
138	hlist_for_each_safe(pos, next, &cache->hashtable[i]) {
139	cred = hlist_entry(pos, struct rpc_cred, cr_hash);
140	__hlist_del(&cred->cr_hash);
141	hlist_add_head(&cred->cr_hash, &free);
142	}
143	}
144	spin_unlock(&rpc_credcache_lock);
145	rpcauth_destroy_credlist(&free);
146	}
147
148	static void
149	rpcauth_prune_expired(struct rpc_auth auth, struct rpc_cred cred, struct hlist_head *free)
150	{
151	if (atomic_read(&cred->cr_count) != 1)
152	return;
153	if (time_after(jiffies, cred->cr_expire + auth->au_credcache->expire))
154	cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
155	if (!(cred->cr_flags & RPCAUTH_CRED_UPTODATE)) {
156	__hlist_del(&cred->cr_hash);
157	hlist_add_head(&cred->cr_hash, free);
158	}
159	}
160
161	/*
162	* Remove stale credentials. Avoid sleeping inside the loop.
163	*/
164	static void
165	rpcauth_gc_credcache(struct rpc_auth auth, struct hlist_head free)
166	{
167	struct rpc_cred_cache *cache = auth->au_credcache;
168	struct hlist_node pos, next;
169	struct rpc_cred *cred;
170	int i;
171
172	dprintk("RPC: gc'ing RPC credentials for auth %p\n", auth);
173	for (i = 0; i < RPC_CREDCACHE_NR; i++) {
174	hlist_for_each_safe(pos, next, &cache->hashtable[i]) {
175	cred = hlist_entry(pos, struct rpc_cred, cr_hash);
176	rpcauth_prune_expired(auth, cred, free);
177	}
178	}
179	cache->nextgc = jiffies + cache->expire;
180	}
181
182	/*
183	* Look up a process' credentials in the authentication cache
184	*/
185	struct rpc_cred *
186	rpcauth_lookup_credcache(struct rpc_auth auth, struct auth_cred acred,
187	int taskflags)
188	{
189	struct rpc_cred_cache *cache = auth->au_credcache;
190	HLIST_HEAD(free);
191	struct hlist_node pos, next;
192	struct rpc_cred *new = NULL,
193	*cred = NULL;
194	int nr = 0;
195
196	if (!(taskflags & RPC_TASK_ROOTCREDS))
197	nr = acred->uid & RPC_CREDCACHE_MASK;
198	retry:
199	spin_lock(&rpc_credcache_lock);
200	if (time_before(cache->nextgc, jiffies))
201	rpcauth_gc_credcache(auth, &free);
202	hlist_for_each_safe(pos, next, &cache->hashtable[nr]) {
203	struct rpc_cred *entry;
204	entry = hlist_entry(pos, struct rpc_cred, cr_hash);
205	if (entry->cr_ops->crmatch(acred, entry, taskflags)) {
206	hlist_del(&entry->cr_hash);
207	cred = entry;
208	break;
209	}
210	rpcauth_prune_expired(auth, entry, &free);
211	}
212	if (new) {
213	if (cred)
214	hlist_add_head(&new->cr_hash, &free);
215	else
216	cred = new;
217	}
218	if (cred) {
219	hlist_add_head(&cred->cr_hash, &cache->hashtable[nr]);
220	get_rpccred(cred);
221	}
222	spin_unlock(&rpc_credcache_lock);
223
224	rpcauth_destroy_credlist(&free);
225
226	if (!cred) {
227	new = auth->au_ops->crcreate(auth, acred, taskflags);
228	if (!IS_ERR(new)) {
229	#ifdef RPC_DEBUG
230	new->cr_magic = RPCAUTH_CRED_MAGIC;
231	#endif
232	goto retry;
233	} else
234	cred = new;
235	}
236
237	return (struct rpc_cred *) cred;
238	}
239
240	struct rpc_cred *
241	rpcauth_lookupcred(struct rpc_auth *auth, int taskflags)
242	{
243	struct auth_cred acred = {
244	.uid = current->fsuid,
245	.gid = current->fsgid,
246	.group_info = current->group_info,
247	};
248	struct rpc_cred *ret;
249
250	dprintk("RPC: looking up %s cred\n",
251	auth->au_ops->au_name);
252	get_group_info(acred.group_info);
253	ret = auth->au_ops->lookup_cred(auth, &acred, taskflags);
254	put_group_info(acred.group_info);
255	return ret;
256	}
257
258	struct rpc_cred *
259	rpcauth_bindcred(struct rpc_task *task)
260	{
261	struct rpc_auth *auth = task->tk_auth;
262	struct auth_cred acred = {
263	.uid = current->fsuid,
264	.gid = current->fsgid,
265	.group_info = current->group_info,
266	};
267	struct rpc_cred *ret;
268
269	dprintk("RPC: %4d looking up %s cred\n",
270	task->tk_pid, task->tk_auth->au_ops->au_name);
271	get_group_info(acred.group_info);
272	ret = auth->au_ops->lookup_cred(auth, &acred, task->tk_flags);
273	if (!IS_ERR(ret))
274	task->tk_msg.rpc_cred = ret;
275	else
276	task->tk_status = PTR_ERR(ret);
277	put_group_info(acred.group_info);
278	return ret;
279	}
280
281	void
282	rpcauth_holdcred(struct rpc_task *task)
283	{
284	dprintk("RPC: %4d holding %s cred %p\n",
285	task->tk_pid, task->tk_auth->au_ops->au_name, task->tk_msg.rpc_cred);
286	if (task->tk_msg.rpc_cred)
287	get_rpccred(task->tk_msg.rpc_cred);
288	}
289
290	void
291	put_rpccred(struct rpc_cred *cred)
292	{
293	cred->cr_expire = jiffies;
294	if (!atomic_dec_and_test(&cred->cr_count))
295	return;
296	cred->cr_ops->crdestroy(cred);
297	}
298
299	void
300	rpcauth_unbindcred(struct rpc_task *task)
301	{
1da177e4 LT	302	struct rpc_cred *cred = task->tk_msg.rpc_cred;
	303
	304	dprintk("RPC: %4d releasing %s cred %p\n",
0bbacc40	305	task->tk_pid, task->tk_auth->au_ops->au_name, cred);
1da177e4 LT	306
	307	put_rpccred(cred);
	308	task->tk_msg.rpc_cred = NULL;
	309	}
	310
	311	u32 *
	312	rpcauth_marshcred(struct rpc_task task, u32 p)
	313	{
1da177e4 LT	314	struct rpc_cred *cred = task->tk_msg.rpc_cred;
	315
	316	dprintk("RPC: %4d marshaling %s cred %p\n",
0bbacc40 CL	317	task->tk_pid, task->tk_auth->au_ops->au_name, cred);
0bbacc40 CL	318
1da177e4 LT	319	return cred->cr_ops->crmarshal(task, p);
	320	}
	321
	322	u32 *
	323	rpcauth_checkverf(struct rpc_task task, u32 p)
	324	{
1da177e4 LT	325	struct rpc_cred *cred = task->tk_msg.rpc_cred;
	326
	327	dprintk("RPC: %4d validating %s cred %p\n",
0bbacc40 CL	328	task->tk_pid, task->tk_auth->au_ops->au_name, cred);
0bbacc40 CL	329
1da177e4 LT	330	return cred->cr_ops->crvalidate(task, p);
	331	}
	332
	333	int
	334	rpcauth_wrap_req(struct rpc_task task, kxdrproc_t encode, void rqstp,
	335	u32 data, void obj)
	336	{
	337	struct rpc_cred *cred = task->tk_msg.rpc_cred;
	338
	339	dprintk("RPC: %4d using %s cred %p to wrap rpc data\n",
	340	task->tk_pid, cred->cr_ops->cr_name, cred);
	341	if (cred->cr_ops->crwrap_req)
	342	return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj);
	343	/* By default, we encode the arguments normally. */
	344	return encode(rqstp, data, obj);
	345	}
	346
	347	int
	348	rpcauth_unwrap_resp(struct rpc_task task, kxdrproc_t decode, void rqstp,
	349	u32 data, void obj)
	350	{
	351	struct rpc_cred *cred = task->tk_msg.rpc_cred;
	352
	353	dprintk("RPC: %4d using %s cred %p to unwrap rpc data\n",
	354	task->tk_pid, cred->cr_ops->cr_name, cred);
	355	if (cred->cr_ops->crunwrap_resp)
	356	return cred->cr_ops->crunwrap_resp(task, decode, rqstp,
	357	data, obj);
	358	/* By default, we decode the arguments normally. */
	359	return decode(rqstp, data, obj);
	360	}
	361
	362	int
	363	rpcauth_refreshcred(struct rpc_task *task)
	364	{
1da177e4 LT	365	struct rpc_cred *cred = task->tk_msg.rpc_cred;
	366	int err;
	367
	368	dprintk("RPC: %4d refreshing %s cred %p\n",
0bbacc40 CL	369	task->tk_pid, task->tk_auth->au_ops->au_name, cred);
0bbacc40 CL	370
1da177e4 LT	371	err = cred->cr_ops->crrefresh(task);
	372	if (err < 0)
	373	task->tk_status = err;
	374	return err;
	375	}
	376
	377	void
	378	rpcauth_invalcred(struct rpc_task *task)
	379	{
	380	dprintk("RPC: %4d invalidating %s cred %p\n",
	381	task->tk_pid, task->tk_auth->au_ops->au_name, task->tk_msg.rpc_cred);
	382	spin_lock(&rpc_credcache_lock);
	383	if (task->tk_msg.rpc_cred)
	384	task->tk_msg.rpc_cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
	385	spin_unlock(&rpc_credcache_lock);
	386	}
	387
	388	int
	389	rpcauth_uptodatecred(struct rpc_task *task)
	390	{
	391	return !(task->tk_msg.rpc_cred) \|\|
	392	(task->tk_msg.rpc_cred->cr_flags & RPCAUTH_CRED_UPTODATE);
	393	}