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> | |
25337fdc | 14 | #include <linux/hash.h> |
1da177e4 LT |
15 | #include <linux/sunrpc/clnt.h> |
16 | #include <linux/spinlock.h> | |
17 | ||
18 | #ifdef RPC_DEBUG | |
19 | # define RPCDBG_FACILITY RPCDBG_AUTH | |
20 | #endif | |
21 | ||
fc1b356f | 22 | static DEFINE_SPINLOCK(rpc_authflavor_lock); |
f1c0a861 | 23 | static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = { |
1da177e4 LT |
24 | &authnull_ops, /* AUTH_NULL */ |
25 | &authunix_ops, /* AUTH_UNIX */ | |
26 | NULL, /* others can be loadable modules */ | |
27 | }; | |
28 | ||
e092bdcd | 29 | static LIST_HEAD(cred_unused); |
f5c2187c | 30 | static unsigned long number_cred_unused; |
e092bdcd | 31 | |
1da177e4 LT |
32 | static u32 |
33 | pseudoflavor_to_flavor(u32 flavor) { | |
34 | if (flavor >= RPC_AUTH_MAXFLAVOR) | |
35 | return RPC_AUTH_GSS; | |
36 | return flavor; | |
37 | } | |
38 | ||
39 | int | |
f1c0a861 | 40 | rpcauth_register(const struct rpc_authops *ops) |
1da177e4 LT |
41 | { |
42 | rpc_authflavor_t flavor; | |
fc1b356f | 43 | int ret = -EPERM; |
1da177e4 LT |
44 | |
45 | if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR) | |
46 | return -EINVAL; | |
fc1b356f TM |
47 | spin_lock(&rpc_authflavor_lock); |
48 | if (auth_flavors[flavor] == NULL) { | |
49 | auth_flavors[flavor] = ops; | |
50 | ret = 0; | |
51 | } | |
52 | spin_unlock(&rpc_authflavor_lock); | |
53 | return ret; | |
1da177e4 | 54 | } |
e8914c65 | 55 | EXPORT_SYMBOL_GPL(rpcauth_register); |
1da177e4 LT |
56 | |
57 | int | |
f1c0a861 | 58 | rpcauth_unregister(const struct rpc_authops *ops) |
1da177e4 LT |
59 | { |
60 | rpc_authflavor_t flavor; | |
fc1b356f | 61 | int ret = -EPERM; |
1da177e4 LT |
62 | |
63 | if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR) | |
64 | return -EINVAL; | |
fc1b356f TM |
65 | spin_lock(&rpc_authflavor_lock); |
66 | if (auth_flavors[flavor] == ops) { | |
67 | auth_flavors[flavor] = NULL; | |
68 | ret = 0; | |
69 | } | |
70 | spin_unlock(&rpc_authflavor_lock); | |
71 | return ret; | |
1da177e4 | 72 | } |
e8914c65 | 73 | EXPORT_SYMBOL_GPL(rpcauth_unregister); |
1da177e4 LT |
74 | |
75 | struct rpc_auth * | |
76 | rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt) | |
77 | { | |
78 | struct rpc_auth *auth; | |
f1c0a861 | 79 | const struct rpc_authops *ops; |
1da177e4 LT |
80 | u32 flavor = pseudoflavor_to_flavor(pseudoflavor); |
81 | ||
f344f6df OK |
82 | auth = ERR_PTR(-EINVAL); |
83 | if (flavor >= RPC_AUTH_MAXFLAVOR) | |
84 | goto out; | |
85 | ||
f344f6df OK |
86 | #ifdef CONFIG_KMOD |
87 | if ((ops = auth_flavors[flavor]) == NULL) | |
88 | request_module("rpc-auth-%u", flavor); | |
89 | #endif | |
fc1b356f TM |
90 | spin_lock(&rpc_authflavor_lock); |
91 | ops = auth_flavors[flavor]; | |
92 | if (ops == NULL || !try_module_get(ops->owner)) { | |
93 | spin_unlock(&rpc_authflavor_lock); | |
f344f6df | 94 | goto out; |
fc1b356f TM |
95 | } |
96 | spin_unlock(&rpc_authflavor_lock); | |
1da177e4 | 97 | auth = ops->create(clnt, pseudoflavor); |
fc1b356f | 98 | module_put(ops->owner); |
6a19275a BF |
99 | if (IS_ERR(auth)) |
100 | return auth; | |
1da177e4 | 101 | if (clnt->cl_auth) |
de7a8ce3 | 102 | rpcauth_release(clnt->cl_auth); |
1da177e4 | 103 | clnt->cl_auth = auth; |
f344f6df OK |
104 | |
105 | out: | |
1da177e4 LT |
106 | return auth; |
107 | } | |
e8914c65 | 108 | EXPORT_SYMBOL_GPL(rpcauth_create); |
1da177e4 LT |
109 | |
110 | void | |
de7a8ce3 | 111 | rpcauth_release(struct rpc_auth *auth) |
1da177e4 LT |
112 | { |
113 | if (!atomic_dec_and_test(&auth->au_count)) | |
114 | return; | |
115 | auth->au_ops->destroy(auth); | |
116 | } | |
117 | ||
118 | static DEFINE_SPINLOCK(rpc_credcache_lock); | |
119 | ||
31be5bf1 TM |
120 | static void |
121 | rpcauth_unhash_cred_locked(struct rpc_cred *cred) | |
122 | { | |
123 | hlist_del_rcu(&cred->cr_hash); | |
124 | smp_mb__before_clear_bit(); | |
125 | clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); | |
126 | } | |
127 | ||
9499b434 TM |
128 | static void |
129 | rpcauth_unhash_cred(struct rpc_cred *cred) | |
130 | { | |
131 | spinlock_t *cache_lock; | |
132 | ||
133 | cache_lock = &cred->cr_auth->au_credcache->lock; | |
134 | spin_lock(cache_lock); | |
135 | if (atomic_read(&cred->cr_count) == 0) | |
136 | rpcauth_unhash_cred_locked(cred); | |
137 | spin_unlock(cache_lock); | |
138 | } | |
139 | ||
1da177e4 LT |
140 | /* |
141 | * Initialize RPC credential cache | |
142 | */ | |
143 | int | |
f5c2187c | 144 | rpcauth_init_credcache(struct rpc_auth *auth) |
1da177e4 LT |
145 | { |
146 | struct rpc_cred_cache *new; | |
147 | int i; | |
148 | ||
8b3a7005 | 149 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
150 | if (!new) |
151 | return -ENOMEM; | |
152 | for (i = 0; i < RPC_CREDCACHE_NR; i++) | |
153 | INIT_HLIST_HEAD(&new->hashtable[i]); | |
9499b434 | 154 | spin_lock_init(&new->lock); |
1da177e4 LT |
155 | auth->au_credcache = new; |
156 | return 0; | |
157 | } | |
e8914c65 | 158 | EXPORT_SYMBOL_GPL(rpcauth_init_credcache); |
1da177e4 LT |
159 | |
160 | /* | |
161 | * Destroy a list of credentials | |
162 | */ | |
163 | static inline | |
e092bdcd | 164 | void rpcauth_destroy_credlist(struct list_head *head) |
1da177e4 LT |
165 | { |
166 | struct rpc_cred *cred; | |
167 | ||
e092bdcd TM |
168 | while (!list_empty(head)) { |
169 | cred = list_entry(head->next, struct rpc_cred, cr_lru); | |
170 | list_del_init(&cred->cr_lru); | |
1da177e4 LT |
171 | put_rpccred(cred); |
172 | } | |
173 | } | |
174 | ||
175 | /* | |
176 | * Clear the RPC credential cache, and delete those credentials | |
177 | * that are not referenced. | |
178 | */ | |
179 | void | |
3ab9bb72 | 180 | rpcauth_clear_credcache(struct rpc_cred_cache *cache) |
1da177e4 | 181 | { |
e092bdcd TM |
182 | LIST_HEAD(free); |
183 | struct hlist_head *head; | |
1da177e4 LT |
184 | struct rpc_cred *cred; |
185 | int i; | |
186 | ||
187 | spin_lock(&rpc_credcache_lock); | |
9499b434 | 188 | spin_lock(&cache->lock); |
1da177e4 | 189 | for (i = 0; i < RPC_CREDCACHE_NR; i++) { |
e092bdcd TM |
190 | head = &cache->hashtable[i]; |
191 | while (!hlist_empty(head)) { | |
192 | cred = hlist_entry(head->first, struct rpc_cred, cr_hash); | |
193 | get_rpccred(cred); | |
f5c2187c TM |
194 | if (!list_empty(&cred->cr_lru)) { |
195 | list_del(&cred->cr_lru); | |
196 | number_cred_unused--; | |
197 | } | |
198 | list_add_tail(&cred->cr_lru, &free); | |
31be5bf1 | 199 | rpcauth_unhash_cred_locked(cred); |
1da177e4 LT |
200 | } |
201 | } | |
9499b434 | 202 | spin_unlock(&cache->lock); |
1da177e4 LT |
203 | spin_unlock(&rpc_credcache_lock); |
204 | rpcauth_destroy_credlist(&free); | |
205 | } | |
206 | ||
3ab9bb72 TM |
207 | /* |
208 | * Destroy the RPC credential cache | |
209 | */ | |
210 | void | |
211 | rpcauth_destroy_credcache(struct rpc_auth *auth) | |
212 | { | |
213 | struct rpc_cred_cache *cache = auth->au_credcache; | |
214 | ||
215 | if (cache) { | |
216 | auth->au_credcache = NULL; | |
217 | rpcauth_clear_credcache(cache); | |
218 | kfree(cache); | |
219 | } | |
220 | } | |
e8914c65 | 221 | EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache); |
3ab9bb72 | 222 | |
e092bdcd TM |
223 | /* |
224 | * Remove stale credentials. Avoid sleeping inside the loop. | |
225 | */ | |
f5c2187c TM |
226 | static int |
227 | rpcauth_prune_expired(struct list_head *free, int nr_to_scan) | |
1da177e4 | 228 | { |
9499b434 | 229 | spinlock_t *cache_lock; |
e092bdcd TM |
230 | struct rpc_cred *cred; |
231 | ||
232 | while (!list_empty(&cred_unused)) { | |
233 | cred = list_entry(cred_unused.next, struct rpc_cred, cr_lru); | |
e092bdcd | 234 | list_del_init(&cred->cr_lru); |
f5c2187c | 235 | number_cred_unused--; |
e092bdcd TM |
236 | if (atomic_read(&cred->cr_count) != 0) |
237 | continue; | |
9499b434 TM |
238 | cache_lock = &cred->cr_auth->au_credcache->lock; |
239 | spin_lock(cache_lock); | |
240 | if (atomic_read(&cred->cr_count) == 0) { | |
241 | get_rpccred(cred); | |
242 | list_add_tail(&cred->cr_lru, free); | |
243 | rpcauth_unhash_cred_locked(cred); | |
f5c2187c | 244 | nr_to_scan--; |
9499b434 TM |
245 | } |
246 | spin_unlock(cache_lock); | |
f5c2187c TM |
247 | if (nr_to_scan == 0) |
248 | break; | |
1da177e4 | 249 | } |
f5c2187c | 250 | return nr_to_scan; |
1da177e4 LT |
251 | } |
252 | ||
253 | /* | |
f5c2187c | 254 | * Run memory cache shrinker. |
1da177e4 | 255 | */ |
f5c2187c TM |
256 | static int |
257 | rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask) | |
1da177e4 | 258 | { |
f5c2187c TM |
259 | LIST_HEAD(free); |
260 | int res; | |
261 | ||
262 | if (list_empty(&cred_unused)) | |
263 | return 0; | |
31be5bf1 | 264 | spin_lock(&rpc_credcache_lock); |
f5c2187c TM |
265 | nr_to_scan = rpcauth_prune_expired(&free, nr_to_scan); |
266 | res = (number_cred_unused / 100) * sysctl_vfs_cache_pressure; | |
31be5bf1 | 267 | spin_unlock(&rpc_credcache_lock); |
f5c2187c TM |
268 | rpcauth_destroy_credlist(&free); |
269 | return res; | |
1da177e4 LT |
270 | } |
271 | ||
272 | /* | |
273 | * Look up a process' credentials in the authentication cache | |
274 | */ | |
275 | struct rpc_cred * | |
276 | rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred, | |
8a317760 | 277 | int flags) |
1da177e4 | 278 | { |
e092bdcd | 279 | LIST_HEAD(free); |
1da177e4 | 280 | struct rpc_cred_cache *cache = auth->au_credcache; |
e092bdcd | 281 | struct hlist_node *pos; |
31be5bf1 TM |
282 | struct rpc_cred *cred = NULL, |
283 | *entry, *new; | |
25337fdc TM |
284 | unsigned int nr; |
285 | ||
286 | nr = hash_long(acred->uid, RPC_CREDCACHE_HASHBITS); | |
1da177e4 | 287 | |
31be5bf1 TM |
288 | rcu_read_lock(); |
289 | hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) { | |
e092bdcd TM |
290 | if (!entry->cr_ops->crmatch(acred, entry, flags)) |
291 | continue; | |
9499b434 | 292 | spin_lock(&cache->lock); |
31be5bf1 | 293 | if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) { |
9499b434 | 294 | spin_unlock(&cache->lock); |
31be5bf1 TM |
295 | continue; |
296 | } | |
e092bdcd | 297 | cred = get_rpccred(entry); |
9499b434 | 298 | spin_unlock(&cache->lock); |
e092bdcd | 299 | break; |
1da177e4 | 300 | } |
31be5bf1 TM |
301 | rcu_read_unlock(); |
302 | ||
9499b434 | 303 | if (cred != NULL) |
31be5bf1 | 304 | goto found; |
1da177e4 | 305 | |
31be5bf1 TM |
306 | new = auth->au_ops->crcreate(auth, acred, flags); |
307 | if (IS_ERR(new)) { | |
308 | cred = new; | |
309 | goto out; | |
310 | } | |
1da177e4 | 311 | |
9499b434 | 312 | spin_lock(&cache->lock); |
31be5bf1 TM |
313 | hlist_for_each_entry(entry, pos, &cache->hashtable[nr], cr_hash) { |
314 | if (!entry->cr_ops->crmatch(acred, entry, flags)) | |
315 | continue; | |
316 | cred = get_rpccred(entry); | |
317 | break; | |
318 | } | |
319 | if (cred == NULL) { | |
5fe4755e | 320 | cred = new; |
31be5bf1 TM |
321 | set_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); |
322 | hlist_add_head_rcu(&cred->cr_hash, &cache->hashtable[nr]); | |
323 | } else | |
324 | list_add_tail(&new->cr_lru, &free); | |
9499b434 | 325 | spin_unlock(&cache->lock); |
31be5bf1 TM |
326 | found: |
327 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) | |
fba3bad4 TM |
328 | && cred->cr_ops->cr_init != NULL |
329 | && !(flags & RPCAUTH_LOOKUP_NEW)) { | |
330 | int res = cred->cr_ops->cr_init(auth, cred); | |
331 | if (res < 0) { | |
332 | put_rpccred(cred); | |
333 | cred = ERR_PTR(res); | |
334 | } | |
1da177e4 | 335 | } |
31be5bf1 TM |
336 | rpcauth_destroy_credlist(&free); |
337 | out: | |
338 | return cred; | |
1da177e4 | 339 | } |
e8914c65 | 340 | EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache); |
1da177e4 LT |
341 | |
342 | struct rpc_cred * | |
8a317760 | 343 | rpcauth_lookupcred(struct rpc_auth *auth, int flags) |
1da177e4 LT |
344 | { |
345 | struct auth_cred acred = { | |
346 | .uid = current->fsuid, | |
347 | .gid = current->fsgid, | |
348 | .group_info = current->group_info, | |
349 | }; | |
350 | struct rpc_cred *ret; | |
351 | ||
46121cf7 | 352 | dprintk("RPC: looking up %s cred\n", |
1da177e4 LT |
353 | auth->au_ops->au_name); |
354 | get_group_info(acred.group_info); | |
8a317760 | 355 | ret = auth->au_ops->lookup_cred(auth, &acred, flags); |
1da177e4 LT |
356 | put_group_info(acred.group_info); |
357 | return ret; | |
358 | } | |
e8914c65 | 359 | EXPORT_SYMBOL_GPL(rpcauth_lookupcred); |
1da177e4 | 360 | |
5fe4755e TM |
361 | void |
362 | rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred, | |
363 | struct rpc_auth *auth, const struct rpc_credops *ops) | |
364 | { | |
365 | INIT_HLIST_NODE(&cred->cr_hash); | |
e092bdcd | 366 | INIT_LIST_HEAD(&cred->cr_lru); |
5fe4755e TM |
367 | atomic_set(&cred->cr_count, 1); |
368 | cred->cr_auth = auth; | |
369 | cred->cr_ops = ops; | |
370 | cred->cr_expire = jiffies; | |
371 | #ifdef RPC_DEBUG | |
372 | cred->cr_magic = RPCAUTH_CRED_MAGIC; | |
373 | #endif | |
374 | cred->cr_uid = acred->uid; | |
375 | } | |
e8914c65 | 376 | EXPORT_SYMBOL_GPL(rpcauth_init_cred); |
5fe4755e | 377 | |
af093835 TM |
378 | void |
379 | rpcauth_bind_root_cred(struct rpc_task *task) | |
1da177e4 | 380 | { |
1be27f36 | 381 | struct rpc_auth *auth = task->tk_client->cl_auth; |
1da177e4 | 382 | struct auth_cred acred = { |
af093835 TM |
383 | .uid = 0, |
384 | .gid = 0, | |
1da177e4 LT |
385 | }; |
386 | struct rpc_cred *ret; | |
387 | ||
46121cf7 | 388 | dprintk("RPC: %5u looking up %s cred\n", |
1be27f36 | 389 | task->tk_pid, task->tk_client->cl_auth->au_ops->au_name); |
af093835 TM |
390 | ret = auth->au_ops->lookup_cred(auth, &acred, 0); |
391 | if (!IS_ERR(ret)) | |
392 | task->tk_msg.rpc_cred = ret; | |
393 | else | |
394 | task->tk_status = PTR_ERR(ret); | |
395 | } | |
396 | ||
397 | void | |
398 | rpcauth_bindcred(struct rpc_task *task) | |
399 | { | |
400 | struct rpc_auth *auth = task->tk_client->cl_auth; | |
401 | struct rpc_cred *ret; | |
402 | ||
403 | dprintk("RPC: %5u looking up %s cred\n", | |
404 | task->tk_pid, auth->au_ops->au_name); | |
405 | ret = rpcauth_lookupcred(auth, 0); | |
1da177e4 LT |
406 | if (!IS_ERR(ret)) |
407 | task->tk_msg.rpc_cred = ret; | |
408 | else | |
409 | task->tk_status = PTR_ERR(ret); | |
1da177e4 LT |
410 | } |
411 | ||
412 | void | |
413 | rpcauth_holdcred(struct rpc_task *task) | |
414 | { | |
1be27f36 TM |
415 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
416 | if (cred != NULL) { | |
417 | get_rpccred(cred); | |
418 | dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid, | |
419 | cred->cr_auth->au_ops->au_name, cred); | |
420 | } | |
1da177e4 LT |
421 | } |
422 | ||
423 | void | |
424 | put_rpccred(struct rpc_cred *cred) | |
425 | { | |
e092bdcd | 426 | /* Fast path for unhashed credentials */ |
31be5bf1 | 427 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) |
e092bdcd TM |
428 | goto need_lock; |
429 | ||
1da177e4 LT |
430 | if (!atomic_dec_and_test(&cred->cr_count)) |
431 | return; | |
e092bdcd | 432 | goto out_destroy; |
e092bdcd TM |
433 | need_lock: |
434 | if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock)) | |
435 | return; | |
f5c2187c TM |
436 | if (!list_empty(&cred->cr_lru)) { |
437 | number_cred_unused--; | |
e092bdcd | 438 | list_del_init(&cred->cr_lru); |
f5c2187c | 439 | } |
e092bdcd | 440 | if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) |
9499b434 | 441 | rpcauth_unhash_cred(cred); |
31be5bf1 | 442 | else if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) { |
e092bdcd TM |
443 | cred->cr_expire = jiffies; |
444 | list_add_tail(&cred->cr_lru, &cred_unused); | |
f5c2187c | 445 | number_cred_unused++; |
e092bdcd TM |
446 | spin_unlock(&rpc_credcache_lock); |
447 | return; | |
448 | } | |
449 | spin_unlock(&rpc_credcache_lock); | |
450 | out_destroy: | |
1da177e4 LT |
451 | cred->cr_ops->crdestroy(cred); |
452 | } | |
e8914c65 | 453 | EXPORT_SYMBOL_GPL(put_rpccred); |
1da177e4 LT |
454 | |
455 | void | |
456 | rpcauth_unbindcred(struct rpc_task *task) | |
457 | { | |
1da177e4 LT |
458 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
459 | ||
46121cf7 | 460 | dprintk("RPC: %5u releasing %s cred %p\n", |
1be27f36 | 461 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
1da177e4 LT |
462 | |
463 | put_rpccred(cred); | |
464 | task->tk_msg.rpc_cred = NULL; | |
465 | } | |
466 | ||
d8ed029d AD |
467 | __be32 * |
468 | rpcauth_marshcred(struct rpc_task *task, __be32 *p) | |
1da177e4 | 469 | { |
1da177e4 LT |
470 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
471 | ||
46121cf7 | 472 | dprintk("RPC: %5u marshaling %s cred %p\n", |
1be27f36 | 473 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 474 | |
1da177e4 LT |
475 | return cred->cr_ops->crmarshal(task, p); |
476 | } | |
477 | ||
d8ed029d AD |
478 | __be32 * |
479 | rpcauth_checkverf(struct rpc_task *task, __be32 *p) | |
1da177e4 | 480 | { |
1da177e4 LT |
481 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
482 | ||
46121cf7 | 483 | dprintk("RPC: %5u validating %s cred %p\n", |
1be27f36 | 484 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 485 | |
1da177e4 LT |
486 | return cred->cr_ops->crvalidate(task, p); |
487 | } | |
488 | ||
489 | int | |
490 | rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, | |
d8ed029d | 491 | __be32 *data, void *obj) |
1da177e4 LT |
492 | { |
493 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
494 | ||
46121cf7 | 495 | dprintk("RPC: %5u using %s cred %p to wrap rpc data\n", |
1da177e4 LT |
496 | task->tk_pid, cred->cr_ops->cr_name, cred); |
497 | if (cred->cr_ops->crwrap_req) | |
498 | return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj); | |
499 | /* By default, we encode the arguments normally. */ | |
be879c4e | 500 | return rpc_call_xdrproc(encode, rqstp, data, obj); |
1da177e4 LT |
501 | } |
502 | ||
503 | int | |
504 | rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, | |
d8ed029d | 505 | __be32 *data, void *obj) |
1da177e4 LT |
506 | { |
507 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
508 | ||
46121cf7 | 509 | dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n", |
1da177e4 LT |
510 | task->tk_pid, cred->cr_ops->cr_name, cred); |
511 | if (cred->cr_ops->crunwrap_resp) | |
512 | return cred->cr_ops->crunwrap_resp(task, decode, rqstp, | |
513 | data, obj); | |
514 | /* By default, we decode the arguments normally. */ | |
be879c4e | 515 | return rpc_call_xdrproc(decode, rqstp, data, obj); |
1da177e4 LT |
516 | } |
517 | ||
518 | int | |
519 | rpcauth_refreshcred(struct rpc_task *task) | |
520 | { | |
1da177e4 LT |
521 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
522 | int err; | |
523 | ||
46121cf7 | 524 | dprintk("RPC: %5u refreshing %s cred %p\n", |
1be27f36 | 525 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 526 | |
1da177e4 LT |
527 | err = cred->cr_ops->crrefresh(task); |
528 | if (err < 0) | |
529 | task->tk_status = err; | |
530 | return err; | |
531 | } | |
532 | ||
533 | void | |
534 | rpcauth_invalcred(struct rpc_task *task) | |
535 | { | |
fc432dd9 TM |
536 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
537 | ||
46121cf7 | 538 | dprintk("RPC: %5u invalidating %s cred %p\n", |
1be27f36 | 539 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
fc432dd9 TM |
540 | if (cred) |
541 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); | |
1da177e4 LT |
542 | } |
543 | ||
544 | int | |
545 | rpcauth_uptodatecred(struct rpc_task *task) | |
546 | { | |
fc432dd9 TM |
547 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
548 | ||
549 | return cred == NULL || | |
550 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0; | |
1da177e4 | 551 | } |
f5c2187c | 552 | |
8e1f936b RR |
553 | static struct shrinker rpc_cred_shrinker = { |
554 | .shrink = rpcauth_cache_shrinker, | |
555 | .seeks = DEFAULT_SEEKS, | |
556 | }; | |
f5c2187c TM |
557 | |
558 | void __init rpcauth_init_module(void) | |
559 | { | |
560 | rpc_init_authunix(); | |
8e1f936b | 561 | register_shrinker(&rpc_cred_shrinker); |
f5c2187c TM |
562 | } |
563 | ||
564 | void __exit rpcauth_remove_module(void) | |
565 | { | |
8e1f936b | 566 | unregister_shrinker(&rpc_cred_shrinker); |
f5c2187c | 567 | } |