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 | ||
fc1b356f | 21 | static DEFINE_SPINLOCK(rpc_authflavor_lock); |
f1c0a861 | 22 | static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = { |
1da177e4 LT |
23 | &authnull_ops, /* AUTH_NULL */ |
24 | &authunix_ops, /* AUTH_UNIX */ | |
25 | NULL, /* others can be loadable modules */ | |
26 | }; | |
27 | ||
e092bdcd | 28 | static LIST_HEAD(cred_unused); |
f5c2187c | 29 | static unsigned long number_cred_unused; |
e092bdcd | 30 | |
1da177e4 LT |
31 | static u32 |
32 | pseudoflavor_to_flavor(u32 flavor) { | |
33 | if (flavor >= RPC_AUTH_MAXFLAVOR) | |
34 | return RPC_AUTH_GSS; | |
35 | return flavor; | |
36 | } | |
37 | ||
38 | int | |
f1c0a861 | 39 | rpcauth_register(const struct rpc_authops *ops) |
1da177e4 LT |
40 | { |
41 | rpc_authflavor_t flavor; | |
fc1b356f | 42 | int ret = -EPERM; |
1da177e4 LT |
43 | |
44 | if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR) | |
45 | return -EINVAL; | |
fc1b356f TM |
46 | spin_lock(&rpc_authflavor_lock); |
47 | if (auth_flavors[flavor] == NULL) { | |
48 | auth_flavors[flavor] = ops; | |
49 | ret = 0; | |
50 | } | |
51 | spin_unlock(&rpc_authflavor_lock); | |
52 | return ret; | |
1da177e4 | 53 | } |
e8914c65 | 54 | EXPORT_SYMBOL_GPL(rpcauth_register); |
1da177e4 LT |
55 | |
56 | int | |
f1c0a861 | 57 | rpcauth_unregister(const struct rpc_authops *ops) |
1da177e4 LT |
58 | { |
59 | rpc_authflavor_t flavor; | |
fc1b356f | 60 | int ret = -EPERM; |
1da177e4 LT |
61 | |
62 | if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR) | |
63 | return -EINVAL; | |
fc1b356f TM |
64 | spin_lock(&rpc_authflavor_lock); |
65 | if (auth_flavors[flavor] == ops) { | |
66 | auth_flavors[flavor] = NULL; | |
67 | ret = 0; | |
68 | } | |
69 | spin_unlock(&rpc_authflavor_lock); | |
70 | return ret; | |
1da177e4 | 71 | } |
e8914c65 | 72 | EXPORT_SYMBOL_GPL(rpcauth_unregister); |
1da177e4 LT |
73 | |
74 | struct rpc_auth * | |
75 | rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt) | |
76 | { | |
77 | struct rpc_auth *auth; | |
f1c0a861 | 78 | const struct rpc_authops *ops; |
1da177e4 LT |
79 | u32 flavor = pseudoflavor_to_flavor(pseudoflavor); |
80 | ||
f344f6df OK |
81 | auth = ERR_PTR(-EINVAL); |
82 | if (flavor >= RPC_AUTH_MAXFLAVOR) | |
83 | goto out; | |
84 | ||
f344f6df OK |
85 | #ifdef CONFIG_KMOD |
86 | if ((ops = auth_flavors[flavor]) == NULL) | |
87 | request_module("rpc-auth-%u", flavor); | |
88 | #endif | |
fc1b356f TM |
89 | spin_lock(&rpc_authflavor_lock); |
90 | ops = auth_flavors[flavor]; | |
91 | if (ops == NULL || !try_module_get(ops->owner)) { | |
92 | spin_unlock(&rpc_authflavor_lock); | |
f344f6df | 93 | goto out; |
fc1b356f TM |
94 | } |
95 | spin_unlock(&rpc_authflavor_lock); | |
1da177e4 | 96 | auth = ops->create(clnt, pseudoflavor); |
fc1b356f | 97 | module_put(ops->owner); |
6a19275a BF |
98 | if (IS_ERR(auth)) |
99 | return auth; | |
1da177e4 | 100 | if (clnt->cl_auth) |
de7a8ce3 | 101 | rpcauth_release(clnt->cl_auth); |
1da177e4 | 102 | clnt->cl_auth = auth; |
f344f6df OK |
103 | |
104 | out: | |
1da177e4 LT |
105 | return auth; |
106 | } | |
e8914c65 | 107 | EXPORT_SYMBOL_GPL(rpcauth_create); |
1da177e4 LT |
108 | |
109 | void | |
de7a8ce3 | 110 | rpcauth_release(struct rpc_auth *auth) |
1da177e4 LT |
111 | { |
112 | if (!atomic_dec_and_test(&auth->au_count)) | |
113 | return; | |
114 | auth->au_ops->destroy(auth); | |
115 | } | |
116 | ||
117 | static DEFINE_SPINLOCK(rpc_credcache_lock); | |
118 | ||
31be5bf1 TM |
119 | static void |
120 | rpcauth_unhash_cred_locked(struct rpc_cred *cred) | |
121 | { | |
122 | hlist_del_rcu(&cred->cr_hash); | |
123 | smp_mb__before_clear_bit(); | |
124 | clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); | |
125 | } | |
126 | ||
9499b434 TM |
127 | static void |
128 | rpcauth_unhash_cred(struct rpc_cred *cred) | |
129 | { | |
130 | spinlock_t *cache_lock; | |
131 | ||
132 | cache_lock = &cred->cr_auth->au_credcache->lock; | |
133 | spin_lock(cache_lock); | |
134 | if (atomic_read(&cred->cr_count) == 0) | |
135 | rpcauth_unhash_cred_locked(cred); | |
136 | spin_unlock(cache_lock); | |
137 | } | |
138 | ||
1da177e4 LT |
139 | /* |
140 | * Initialize RPC credential cache | |
141 | */ | |
142 | int | |
f5c2187c | 143 | rpcauth_init_credcache(struct rpc_auth *auth) |
1da177e4 LT |
144 | { |
145 | struct rpc_cred_cache *new; | |
146 | int i; | |
147 | ||
8b3a7005 | 148 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
149 | if (!new) |
150 | return -ENOMEM; | |
151 | for (i = 0; i < RPC_CREDCACHE_NR; i++) | |
152 | INIT_HLIST_HEAD(&new->hashtable[i]); | |
9499b434 | 153 | spin_lock_init(&new->lock); |
1da177e4 LT |
154 | auth->au_credcache = new; |
155 | return 0; | |
156 | } | |
e8914c65 | 157 | EXPORT_SYMBOL_GPL(rpcauth_init_credcache); |
1da177e4 LT |
158 | |
159 | /* | |
160 | * Destroy a list of credentials | |
161 | */ | |
162 | static inline | |
e092bdcd | 163 | void rpcauth_destroy_credlist(struct list_head *head) |
1da177e4 LT |
164 | { |
165 | struct rpc_cred *cred; | |
166 | ||
e092bdcd TM |
167 | while (!list_empty(head)) { |
168 | cred = list_entry(head->next, struct rpc_cred, cr_lru); | |
169 | list_del_init(&cred->cr_lru); | |
1da177e4 LT |
170 | put_rpccred(cred); |
171 | } | |
172 | } | |
173 | ||
174 | /* | |
175 | * Clear the RPC credential cache, and delete those credentials | |
176 | * that are not referenced. | |
177 | */ | |
178 | void | |
3ab9bb72 | 179 | rpcauth_clear_credcache(struct rpc_cred_cache *cache) |
1da177e4 | 180 | { |
e092bdcd TM |
181 | LIST_HEAD(free); |
182 | struct hlist_head *head; | |
1da177e4 LT |
183 | struct rpc_cred *cred; |
184 | int i; | |
185 | ||
186 | spin_lock(&rpc_credcache_lock); | |
9499b434 | 187 | spin_lock(&cache->lock); |
1da177e4 | 188 | for (i = 0; i < RPC_CREDCACHE_NR; i++) { |
e092bdcd TM |
189 | head = &cache->hashtable[i]; |
190 | while (!hlist_empty(head)) { | |
191 | cred = hlist_entry(head->first, struct rpc_cred, cr_hash); | |
192 | get_rpccred(cred); | |
f5c2187c TM |
193 | if (!list_empty(&cred->cr_lru)) { |
194 | list_del(&cred->cr_lru); | |
195 | number_cred_unused--; | |
196 | } | |
197 | list_add_tail(&cred->cr_lru, &free); | |
31be5bf1 | 198 | rpcauth_unhash_cred_locked(cred); |
1da177e4 LT |
199 | } |
200 | } | |
9499b434 | 201 | spin_unlock(&cache->lock); |
1da177e4 LT |
202 | spin_unlock(&rpc_credcache_lock); |
203 | rpcauth_destroy_credlist(&free); | |
204 | } | |
205 | ||
3ab9bb72 TM |
206 | /* |
207 | * Destroy the RPC credential cache | |
208 | */ | |
209 | void | |
210 | rpcauth_destroy_credcache(struct rpc_auth *auth) | |
211 | { | |
212 | struct rpc_cred_cache *cache = auth->au_credcache; | |
213 | ||
214 | if (cache) { | |
215 | auth->au_credcache = NULL; | |
216 | rpcauth_clear_credcache(cache); | |
217 | kfree(cache); | |
218 | } | |
219 | } | |
e8914c65 | 220 | EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache); |
3ab9bb72 | 221 | |
e092bdcd TM |
222 | /* |
223 | * Remove stale credentials. Avoid sleeping inside the loop. | |
224 | */ | |
f5c2187c TM |
225 | static int |
226 | rpcauth_prune_expired(struct list_head *free, int nr_to_scan) | |
1da177e4 | 227 | { |
9499b434 | 228 | spinlock_t *cache_lock; |
e092bdcd TM |
229 | struct rpc_cred *cred; |
230 | ||
231 | while (!list_empty(&cred_unused)) { | |
232 | cred = list_entry(cred_unused.next, struct rpc_cred, cr_lru); | |
e092bdcd | 233 | list_del_init(&cred->cr_lru); |
f5c2187c | 234 | number_cred_unused--; |
e092bdcd TM |
235 | if (atomic_read(&cred->cr_count) != 0) |
236 | continue; | |
9499b434 TM |
237 | cache_lock = &cred->cr_auth->au_credcache->lock; |
238 | spin_lock(cache_lock); | |
239 | if (atomic_read(&cred->cr_count) == 0) { | |
240 | get_rpccred(cred); | |
241 | list_add_tail(&cred->cr_lru, free); | |
242 | rpcauth_unhash_cred_locked(cred); | |
f5c2187c | 243 | nr_to_scan--; |
9499b434 TM |
244 | } |
245 | spin_unlock(cache_lock); | |
f5c2187c TM |
246 | if (nr_to_scan == 0) |
247 | break; | |
1da177e4 | 248 | } |
f5c2187c | 249 | return nr_to_scan; |
1da177e4 LT |
250 | } |
251 | ||
252 | /* | |
f5c2187c | 253 | * Run memory cache shrinker. |
1da177e4 | 254 | */ |
f5c2187c TM |
255 | static int |
256 | rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask) | |
1da177e4 | 257 | { |
f5c2187c TM |
258 | LIST_HEAD(free); |
259 | int res; | |
260 | ||
261 | if (list_empty(&cred_unused)) | |
262 | return 0; | |
31be5bf1 | 263 | spin_lock(&rpc_credcache_lock); |
f5c2187c TM |
264 | nr_to_scan = rpcauth_prune_expired(&free, nr_to_scan); |
265 | res = (number_cred_unused / 100) * sysctl_vfs_cache_pressure; | |
31be5bf1 | 266 | spin_unlock(&rpc_credcache_lock); |
f5c2187c TM |
267 | rpcauth_destroy_credlist(&free); |
268 | return res; | |
1da177e4 LT |
269 | } |
270 | ||
271 | /* | |
272 | * Look up a process' credentials in the authentication cache | |
273 | */ | |
274 | struct rpc_cred * | |
275 | rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred, | |
8a317760 | 276 | int flags) |
1da177e4 | 277 | { |
e092bdcd | 278 | LIST_HEAD(free); |
1da177e4 | 279 | struct rpc_cred_cache *cache = auth->au_credcache; |
e092bdcd | 280 | struct hlist_node *pos; |
31be5bf1 TM |
281 | struct rpc_cred *cred = NULL, |
282 | *entry, *new; | |
1da177e4 LT |
283 | int nr = 0; |
284 | ||
8a317760 | 285 | if (!(flags & RPCAUTH_LOOKUP_ROOTCREDS)) |
1da177e4 | 286 | nr = acred->uid & RPC_CREDCACHE_MASK; |
31be5bf1 TM |
287 | |
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 | |
1da177e4 LT |
378 | struct rpc_cred * |
379 | rpcauth_bindcred(struct rpc_task *task) | |
380 | { | |
1be27f36 | 381 | struct rpc_auth *auth = task->tk_client->cl_auth; |
1da177e4 LT |
382 | struct auth_cred acred = { |
383 | .uid = current->fsuid, | |
384 | .gid = current->fsgid, | |
385 | .group_info = current->group_info, | |
386 | }; | |
387 | struct rpc_cred *ret; | |
50859259 | 388 | sigset_t oldset; |
8a317760 | 389 | int flags = 0; |
1da177e4 | 390 | |
46121cf7 | 391 | dprintk("RPC: %5u looking up %s cred\n", |
1be27f36 | 392 | task->tk_pid, task->tk_client->cl_auth->au_ops->au_name); |
1da177e4 | 393 | get_group_info(acred.group_info); |
8a317760 TM |
394 | if (task->tk_flags & RPC_TASK_ROOTCREDS) |
395 | flags |= RPCAUTH_LOOKUP_ROOTCREDS; | |
50859259 | 396 | rpc_clnt_sigmask(task->tk_client, &oldset); |
8a317760 | 397 | ret = auth->au_ops->lookup_cred(auth, &acred, flags); |
50859259 | 398 | rpc_clnt_sigunmask(task->tk_client, &oldset); |
1da177e4 LT |
399 | if (!IS_ERR(ret)) |
400 | task->tk_msg.rpc_cred = ret; | |
401 | else | |
402 | task->tk_status = PTR_ERR(ret); | |
403 | put_group_info(acred.group_info); | |
404 | return ret; | |
405 | } | |
406 | ||
407 | void | |
408 | rpcauth_holdcred(struct rpc_task *task) | |
409 | { | |
1be27f36 TM |
410 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
411 | if (cred != NULL) { | |
412 | get_rpccred(cred); | |
413 | dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid, | |
414 | cred->cr_auth->au_ops->au_name, cred); | |
415 | } | |
1da177e4 LT |
416 | } |
417 | ||
418 | void | |
419 | put_rpccred(struct rpc_cred *cred) | |
420 | { | |
e092bdcd | 421 | /* Fast path for unhashed credentials */ |
31be5bf1 | 422 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) |
e092bdcd TM |
423 | goto need_lock; |
424 | ||
1da177e4 LT |
425 | if (!atomic_dec_and_test(&cred->cr_count)) |
426 | return; | |
e092bdcd | 427 | goto out_destroy; |
e092bdcd TM |
428 | need_lock: |
429 | if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock)) | |
430 | return; | |
f5c2187c TM |
431 | if (!list_empty(&cred->cr_lru)) { |
432 | number_cred_unused--; | |
e092bdcd | 433 | list_del_init(&cred->cr_lru); |
f5c2187c | 434 | } |
e092bdcd | 435 | if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) |
9499b434 | 436 | rpcauth_unhash_cred(cred); |
31be5bf1 | 437 | else if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) { |
e092bdcd TM |
438 | cred->cr_expire = jiffies; |
439 | list_add_tail(&cred->cr_lru, &cred_unused); | |
f5c2187c | 440 | number_cred_unused++; |
e092bdcd TM |
441 | spin_unlock(&rpc_credcache_lock); |
442 | return; | |
443 | } | |
444 | spin_unlock(&rpc_credcache_lock); | |
445 | out_destroy: | |
1da177e4 LT |
446 | cred->cr_ops->crdestroy(cred); |
447 | } | |
e8914c65 | 448 | EXPORT_SYMBOL_GPL(put_rpccred); |
1da177e4 LT |
449 | |
450 | void | |
451 | rpcauth_unbindcred(struct rpc_task *task) | |
452 | { | |
1da177e4 LT |
453 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
454 | ||
46121cf7 | 455 | dprintk("RPC: %5u releasing %s cred %p\n", |
1be27f36 | 456 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
1da177e4 LT |
457 | |
458 | put_rpccred(cred); | |
459 | task->tk_msg.rpc_cred = NULL; | |
460 | } | |
461 | ||
d8ed029d AD |
462 | __be32 * |
463 | rpcauth_marshcred(struct rpc_task *task, __be32 *p) | |
1da177e4 | 464 | { |
1da177e4 LT |
465 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
466 | ||
46121cf7 | 467 | dprintk("RPC: %5u marshaling %s cred %p\n", |
1be27f36 | 468 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 469 | |
1da177e4 LT |
470 | return cred->cr_ops->crmarshal(task, p); |
471 | } | |
472 | ||
d8ed029d AD |
473 | __be32 * |
474 | rpcauth_checkverf(struct rpc_task *task, __be32 *p) | |
1da177e4 | 475 | { |
1da177e4 LT |
476 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
477 | ||
46121cf7 | 478 | dprintk("RPC: %5u validating %s cred %p\n", |
1be27f36 | 479 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 480 | |
1da177e4 LT |
481 | return cred->cr_ops->crvalidate(task, p); |
482 | } | |
483 | ||
484 | int | |
485 | rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, | |
d8ed029d | 486 | __be32 *data, void *obj) |
1da177e4 LT |
487 | { |
488 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
489 | ||
46121cf7 | 490 | dprintk("RPC: %5u using %s cred %p to wrap rpc data\n", |
1da177e4 LT |
491 | task->tk_pid, cred->cr_ops->cr_name, cred); |
492 | if (cred->cr_ops->crwrap_req) | |
493 | return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj); | |
494 | /* By default, we encode the arguments normally. */ | |
be879c4e | 495 | return rpc_call_xdrproc(encode, rqstp, data, obj); |
1da177e4 LT |
496 | } |
497 | ||
498 | int | |
499 | rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, | |
d8ed029d | 500 | __be32 *data, void *obj) |
1da177e4 LT |
501 | { |
502 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
503 | ||
46121cf7 | 504 | dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n", |
1da177e4 LT |
505 | task->tk_pid, cred->cr_ops->cr_name, cred); |
506 | if (cred->cr_ops->crunwrap_resp) | |
507 | return cred->cr_ops->crunwrap_resp(task, decode, rqstp, | |
508 | data, obj); | |
509 | /* By default, we decode the arguments normally. */ | |
be879c4e | 510 | return rpc_call_xdrproc(decode, rqstp, data, obj); |
1da177e4 LT |
511 | } |
512 | ||
513 | int | |
514 | rpcauth_refreshcred(struct rpc_task *task) | |
515 | { | |
1da177e4 LT |
516 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
517 | int err; | |
518 | ||
46121cf7 | 519 | dprintk("RPC: %5u refreshing %s cred %p\n", |
1be27f36 | 520 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 521 | |
1da177e4 LT |
522 | err = cred->cr_ops->crrefresh(task); |
523 | if (err < 0) | |
524 | task->tk_status = err; | |
525 | return err; | |
526 | } | |
527 | ||
528 | void | |
529 | rpcauth_invalcred(struct rpc_task *task) | |
530 | { | |
fc432dd9 TM |
531 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
532 | ||
46121cf7 | 533 | dprintk("RPC: %5u invalidating %s cred %p\n", |
1be27f36 | 534 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
fc432dd9 TM |
535 | if (cred) |
536 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); | |
1da177e4 LT |
537 | } |
538 | ||
539 | int | |
540 | rpcauth_uptodatecred(struct rpc_task *task) | |
541 | { | |
fc432dd9 TM |
542 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
543 | ||
544 | return cred == NULL || | |
545 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0; | |
1da177e4 | 546 | } |
f5c2187c | 547 | |
8e1f936b RR |
548 | static struct shrinker rpc_cred_shrinker = { |
549 | .shrink = rpcauth_cache_shrinker, | |
550 | .seeks = DEFAULT_SEEKS, | |
551 | }; | |
f5c2187c TM |
552 | |
553 | void __init rpcauth_init_module(void) | |
554 | { | |
555 | rpc_init_authunix(); | |
8e1f936b | 556 | register_shrinker(&rpc_cred_shrinker); |
f5c2187c TM |
557 | } |
558 | ||
559 | void __exit rpcauth_remove_module(void) | |
560 | { | |
8e1f936b | 561 | unregister_shrinker(&rpc_cred_shrinker); |
f5c2187c | 562 | } |