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 | if ((ops = auth_flavors[flavor]) == NULL) |
87 | request_module("rpc-auth-%u", flavor); | |
fc1b356f TM |
88 | spin_lock(&rpc_authflavor_lock); |
89 | ops = auth_flavors[flavor]; | |
90 | if (ops == NULL || !try_module_get(ops->owner)) { | |
91 | spin_unlock(&rpc_authflavor_lock); | |
f344f6df | 92 | goto out; |
fc1b356f TM |
93 | } |
94 | spin_unlock(&rpc_authflavor_lock); | |
1da177e4 | 95 | auth = ops->create(clnt, pseudoflavor); |
fc1b356f | 96 | module_put(ops->owner); |
6a19275a BF |
97 | if (IS_ERR(auth)) |
98 | return auth; | |
1da177e4 | 99 | if (clnt->cl_auth) |
de7a8ce3 | 100 | rpcauth_release(clnt->cl_auth); |
1da177e4 | 101 | clnt->cl_auth = auth; |
f344f6df OK |
102 | |
103 | out: | |
1da177e4 LT |
104 | return auth; |
105 | } | |
e8914c65 | 106 | EXPORT_SYMBOL_GPL(rpcauth_create); |
1da177e4 LT |
107 | |
108 | void | |
de7a8ce3 | 109 | rpcauth_release(struct rpc_auth *auth) |
1da177e4 LT |
110 | { |
111 | if (!atomic_dec_and_test(&auth->au_count)) | |
112 | return; | |
113 | auth->au_ops->destroy(auth); | |
114 | } | |
115 | ||
116 | static DEFINE_SPINLOCK(rpc_credcache_lock); | |
117 | ||
31be5bf1 TM |
118 | static void |
119 | rpcauth_unhash_cred_locked(struct rpc_cred *cred) | |
120 | { | |
121 | hlist_del_rcu(&cred->cr_hash); | |
122 | smp_mb__before_clear_bit(); | |
123 | clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); | |
124 | } | |
125 | ||
f0380f3d | 126 | static int |
9499b434 TM |
127 | rpcauth_unhash_cred(struct rpc_cred *cred) |
128 | { | |
129 | spinlock_t *cache_lock; | |
f0380f3d | 130 | int ret; |
9499b434 TM |
131 | |
132 | cache_lock = &cred->cr_auth->au_credcache->lock; | |
133 | spin_lock(cache_lock); | |
f0380f3d TM |
134 | ret = atomic_read(&cred->cr_count) == 0; |
135 | if (ret) | |
9499b434 TM |
136 | rpcauth_unhash_cred_locked(cred); |
137 | spin_unlock(cache_lock); | |
f0380f3d | 138 | return ret; |
9499b434 TM |
139 | } |
140 | ||
1da177e4 LT |
141 | /* |
142 | * Initialize RPC credential cache | |
143 | */ | |
144 | int | |
f5c2187c | 145 | rpcauth_init_credcache(struct rpc_auth *auth) |
1da177e4 LT |
146 | { |
147 | struct rpc_cred_cache *new; | |
148 | int i; | |
149 | ||
8b3a7005 | 150 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
151 | if (!new) |
152 | return -ENOMEM; | |
153 | for (i = 0; i < RPC_CREDCACHE_NR; i++) | |
154 | INIT_HLIST_HEAD(&new->hashtable[i]); | |
9499b434 | 155 | spin_lock_init(&new->lock); |
1da177e4 LT |
156 | auth->au_credcache = new; |
157 | return 0; | |
158 | } | |
e8914c65 | 159 | EXPORT_SYMBOL_GPL(rpcauth_init_credcache); |
1da177e4 LT |
160 | |
161 | /* | |
162 | * Destroy a list of credentials | |
163 | */ | |
164 | static inline | |
e092bdcd | 165 | void rpcauth_destroy_credlist(struct list_head *head) |
1da177e4 LT |
166 | { |
167 | struct rpc_cred *cred; | |
168 | ||
e092bdcd TM |
169 | while (!list_empty(head)) { |
170 | cred = list_entry(head->next, struct rpc_cred, cr_lru); | |
171 | list_del_init(&cred->cr_lru); | |
1da177e4 LT |
172 | put_rpccred(cred); |
173 | } | |
174 | } | |
175 | ||
176 | /* | |
177 | * Clear the RPC credential cache, and delete those credentials | |
178 | * that are not referenced. | |
179 | */ | |
180 | void | |
3ab9bb72 | 181 | rpcauth_clear_credcache(struct rpc_cred_cache *cache) |
1da177e4 | 182 | { |
e092bdcd TM |
183 | LIST_HEAD(free); |
184 | struct hlist_head *head; | |
1da177e4 LT |
185 | struct rpc_cred *cred; |
186 | int i; | |
187 | ||
188 | spin_lock(&rpc_credcache_lock); | |
9499b434 | 189 | spin_lock(&cache->lock); |
1da177e4 | 190 | for (i = 0; i < RPC_CREDCACHE_NR; i++) { |
e092bdcd TM |
191 | head = &cache->hashtable[i]; |
192 | while (!hlist_empty(head)) { | |
193 | cred = hlist_entry(head->first, struct rpc_cred, cr_hash); | |
194 | get_rpccred(cred); | |
f5c2187c TM |
195 | if (!list_empty(&cred->cr_lru)) { |
196 | list_del(&cred->cr_lru); | |
197 | number_cred_unused--; | |
198 | } | |
199 | list_add_tail(&cred->cr_lru, &free); | |
31be5bf1 | 200 | rpcauth_unhash_cred_locked(cred); |
1da177e4 LT |
201 | } |
202 | } | |
9499b434 | 203 | spin_unlock(&cache->lock); |
1da177e4 LT |
204 | spin_unlock(&rpc_credcache_lock); |
205 | rpcauth_destroy_credlist(&free); | |
206 | } | |
207 | ||
3ab9bb72 TM |
208 | /* |
209 | * Destroy the RPC credential cache | |
210 | */ | |
211 | void | |
212 | rpcauth_destroy_credcache(struct rpc_auth *auth) | |
213 | { | |
214 | struct rpc_cred_cache *cache = auth->au_credcache; | |
215 | ||
216 | if (cache) { | |
217 | auth->au_credcache = NULL; | |
218 | rpcauth_clear_credcache(cache); | |
219 | kfree(cache); | |
220 | } | |
221 | } | |
e8914c65 | 222 | EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache); |
3ab9bb72 | 223 | |
d2b83141 TM |
224 | |
225 | #define RPC_AUTH_EXPIRY_MORATORIUM (60 * HZ) | |
226 | ||
e092bdcd TM |
227 | /* |
228 | * Remove stale credentials. Avoid sleeping inside the loop. | |
229 | */ | |
f5c2187c TM |
230 | static int |
231 | rpcauth_prune_expired(struct list_head *free, int nr_to_scan) | |
1da177e4 | 232 | { |
9499b434 | 233 | spinlock_t *cache_lock; |
eac0d18d | 234 | struct rpc_cred *cred, *next; |
d2b83141 | 235 | unsigned long expired = jiffies - RPC_AUTH_EXPIRY_MORATORIUM; |
e092bdcd | 236 | |
eac0d18d TM |
237 | list_for_each_entry_safe(cred, next, &cred_unused, cr_lru) { |
238 | ||
239 | /* Enforce a 60 second garbage collection moratorium */ | |
64672d55 | 240 | if (time_in_range_open(cred->cr_expire, expired, jiffies) && |
eac0d18d TM |
241 | test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) |
242 | continue; | |
243 | ||
e092bdcd | 244 | list_del_init(&cred->cr_lru); |
f5c2187c | 245 | number_cred_unused--; |
e092bdcd TM |
246 | if (atomic_read(&cred->cr_count) != 0) |
247 | continue; | |
eac0d18d | 248 | |
9499b434 TM |
249 | cache_lock = &cred->cr_auth->au_credcache->lock; |
250 | spin_lock(cache_lock); | |
251 | if (atomic_read(&cred->cr_count) == 0) { | |
252 | get_rpccred(cred); | |
253 | list_add_tail(&cred->cr_lru, free); | |
254 | rpcauth_unhash_cred_locked(cred); | |
f5c2187c | 255 | nr_to_scan--; |
9499b434 TM |
256 | } |
257 | spin_unlock(cache_lock); | |
f5c2187c TM |
258 | if (nr_to_scan == 0) |
259 | break; | |
1da177e4 | 260 | } |
f5c2187c | 261 | return nr_to_scan; |
1da177e4 LT |
262 | } |
263 | ||
264 | /* | |
f5c2187c | 265 | * Run memory cache shrinker. |
1da177e4 | 266 | */ |
f5c2187c TM |
267 | static int |
268 | rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask) | |
1da177e4 | 269 | { |
f5c2187c TM |
270 | LIST_HEAD(free); |
271 | int res; | |
272 | ||
273 | if (list_empty(&cred_unused)) | |
274 | return 0; | |
31be5bf1 | 275 | spin_lock(&rpc_credcache_lock); |
f5c2187c TM |
276 | nr_to_scan = rpcauth_prune_expired(&free, nr_to_scan); |
277 | res = (number_cred_unused / 100) * sysctl_vfs_cache_pressure; | |
31be5bf1 | 278 | spin_unlock(&rpc_credcache_lock); |
f5c2187c TM |
279 | rpcauth_destroy_credlist(&free); |
280 | return res; | |
1da177e4 LT |
281 | } |
282 | ||
283 | /* | |
284 | * Look up a process' credentials in the authentication cache | |
285 | */ | |
286 | struct rpc_cred * | |
287 | rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred, | |
8a317760 | 288 | int flags) |
1da177e4 | 289 | { |
e092bdcd | 290 | LIST_HEAD(free); |
1da177e4 | 291 | struct rpc_cred_cache *cache = auth->au_credcache; |
e092bdcd | 292 | struct hlist_node *pos; |
31be5bf1 TM |
293 | struct rpc_cred *cred = NULL, |
294 | *entry, *new; | |
25337fdc TM |
295 | unsigned int nr; |
296 | ||
297 | nr = hash_long(acred->uid, RPC_CREDCACHE_HASHBITS); | |
1da177e4 | 298 | |
31be5bf1 TM |
299 | rcu_read_lock(); |
300 | hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) { | |
e092bdcd TM |
301 | if (!entry->cr_ops->crmatch(acred, entry, flags)) |
302 | continue; | |
9499b434 | 303 | spin_lock(&cache->lock); |
31be5bf1 | 304 | if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) { |
9499b434 | 305 | spin_unlock(&cache->lock); |
31be5bf1 TM |
306 | continue; |
307 | } | |
e092bdcd | 308 | cred = get_rpccred(entry); |
9499b434 | 309 | spin_unlock(&cache->lock); |
e092bdcd | 310 | break; |
1da177e4 | 311 | } |
31be5bf1 TM |
312 | rcu_read_unlock(); |
313 | ||
9499b434 | 314 | if (cred != NULL) |
31be5bf1 | 315 | goto found; |
1da177e4 | 316 | |
31be5bf1 TM |
317 | new = auth->au_ops->crcreate(auth, acred, flags); |
318 | if (IS_ERR(new)) { | |
319 | cred = new; | |
320 | goto out; | |
321 | } | |
1da177e4 | 322 | |
9499b434 | 323 | spin_lock(&cache->lock); |
31be5bf1 TM |
324 | hlist_for_each_entry(entry, pos, &cache->hashtable[nr], cr_hash) { |
325 | if (!entry->cr_ops->crmatch(acred, entry, flags)) | |
326 | continue; | |
327 | cred = get_rpccred(entry); | |
328 | break; | |
329 | } | |
330 | if (cred == NULL) { | |
5fe4755e | 331 | cred = new; |
31be5bf1 TM |
332 | set_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); |
333 | hlist_add_head_rcu(&cred->cr_hash, &cache->hashtable[nr]); | |
334 | } else | |
335 | list_add_tail(&new->cr_lru, &free); | |
9499b434 | 336 | spin_unlock(&cache->lock); |
31be5bf1 | 337 | found: |
f64f9e71 JP |
338 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && |
339 | cred->cr_ops->cr_init != NULL && | |
340 | !(flags & RPCAUTH_LOOKUP_NEW)) { | |
fba3bad4 TM |
341 | int res = cred->cr_ops->cr_init(auth, cred); |
342 | if (res < 0) { | |
343 | put_rpccred(cred); | |
344 | cred = ERR_PTR(res); | |
345 | } | |
1da177e4 | 346 | } |
31be5bf1 TM |
347 | rpcauth_destroy_credlist(&free); |
348 | out: | |
349 | return cred; | |
1da177e4 | 350 | } |
e8914c65 | 351 | EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache); |
1da177e4 LT |
352 | |
353 | struct rpc_cred * | |
8a317760 | 354 | rpcauth_lookupcred(struct rpc_auth *auth, int flags) |
1da177e4 | 355 | { |
86a264ab | 356 | struct auth_cred acred; |
1da177e4 | 357 | struct rpc_cred *ret; |
86a264ab | 358 | const struct cred *cred = current_cred(); |
1da177e4 | 359 | |
46121cf7 | 360 | dprintk("RPC: looking up %s cred\n", |
1da177e4 | 361 | auth->au_ops->au_name); |
86a264ab DH |
362 | |
363 | memset(&acred, 0, sizeof(acred)); | |
364 | acred.uid = cred->fsuid; | |
365 | acred.gid = cred->fsgid; | |
366 | acred.group_info = get_group_info(((struct cred *)cred)->group_info); | |
367 | ||
8a317760 | 368 | ret = auth->au_ops->lookup_cred(auth, &acred, flags); |
1da177e4 LT |
369 | put_group_info(acred.group_info); |
370 | return ret; | |
371 | } | |
372 | ||
5fe4755e TM |
373 | void |
374 | rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred, | |
375 | struct rpc_auth *auth, const struct rpc_credops *ops) | |
376 | { | |
377 | INIT_HLIST_NODE(&cred->cr_hash); | |
e092bdcd | 378 | INIT_LIST_HEAD(&cred->cr_lru); |
5fe4755e TM |
379 | atomic_set(&cred->cr_count, 1); |
380 | cred->cr_auth = auth; | |
381 | cred->cr_ops = ops; | |
382 | cred->cr_expire = jiffies; | |
383 | #ifdef RPC_DEBUG | |
384 | cred->cr_magic = RPCAUTH_CRED_MAGIC; | |
385 | #endif | |
386 | cred->cr_uid = acred->uid; | |
387 | } | |
e8914c65 | 388 | EXPORT_SYMBOL_GPL(rpcauth_init_cred); |
5fe4755e | 389 | |
5c691044 | 390 | void |
5d351754 | 391 | rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags) |
4ccda2cd TM |
392 | { |
393 | task->tk_msg.rpc_cred = get_rpccred(cred); | |
394 | dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid, | |
395 | cred->cr_auth->au_ops->au_name, cred); | |
396 | } | |
5c691044 | 397 | EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred); |
4ccda2cd TM |
398 | |
399 | static void | |
5d351754 | 400 | rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags) |
1da177e4 | 401 | { |
1be27f36 | 402 | struct rpc_auth *auth = task->tk_client->cl_auth; |
1da177e4 | 403 | struct auth_cred acred = { |
af093835 TM |
404 | .uid = 0, |
405 | .gid = 0, | |
1da177e4 LT |
406 | }; |
407 | struct rpc_cred *ret; | |
408 | ||
46121cf7 | 409 | dprintk("RPC: %5u looking up %s cred\n", |
1be27f36 | 410 | task->tk_pid, task->tk_client->cl_auth->au_ops->au_name); |
5d351754 | 411 | ret = auth->au_ops->lookup_cred(auth, &acred, lookupflags); |
af093835 TM |
412 | if (!IS_ERR(ret)) |
413 | task->tk_msg.rpc_cred = ret; | |
414 | else | |
415 | task->tk_status = PTR_ERR(ret); | |
416 | } | |
417 | ||
4ccda2cd | 418 | static void |
5d351754 | 419 | rpcauth_bind_new_cred(struct rpc_task *task, int lookupflags) |
af093835 TM |
420 | { |
421 | struct rpc_auth *auth = task->tk_client->cl_auth; | |
422 | struct rpc_cred *ret; | |
423 | ||
424 | dprintk("RPC: %5u looking up %s cred\n", | |
425 | task->tk_pid, auth->au_ops->au_name); | |
5d351754 | 426 | ret = rpcauth_lookupcred(auth, lookupflags); |
1da177e4 LT |
427 | if (!IS_ERR(ret)) |
428 | task->tk_msg.rpc_cred = ret; | |
429 | else | |
430 | task->tk_status = PTR_ERR(ret); | |
1da177e4 LT |
431 | } |
432 | ||
433 | void | |
4ccda2cd | 434 | rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags) |
1da177e4 | 435 | { |
5d351754 TM |
436 | int lookupflags = 0; |
437 | ||
438 | if (flags & RPC_TASK_ASYNC) | |
439 | lookupflags |= RPCAUTH_LOOKUP_NEW; | |
4ccda2cd | 440 | if (cred != NULL) |
5d351754 | 441 | cred->cr_ops->crbind(task, cred, lookupflags); |
4ccda2cd | 442 | else if (flags & RPC_TASK_ROOTCREDS) |
5d351754 | 443 | rpcauth_bind_root_cred(task, lookupflags); |
4ccda2cd | 444 | else |
5d351754 | 445 | rpcauth_bind_new_cred(task, lookupflags); |
1da177e4 LT |
446 | } |
447 | ||
448 | void | |
449 | put_rpccred(struct rpc_cred *cred) | |
450 | { | |
e092bdcd | 451 | /* Fast path for unhashed credentials */ |
f0380f3d TM |
452 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) == 0) { |
453 | if (atomic_dec_and_test(&cred->cr_count)) | |
454 | cred->cr_ops->crdestroy(cred); | |
1da177e4 | 455 | return; |
f0380f3d TM |
456 | } |
457 | ||
e092bdcd TM |
458 | if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock)) |
459 | return; | |
f5c2187c TM |
460 | if (!list_empty(&cred->cr_lru)) { |
461 | number_cred_unused--; | |
e092bdcd | 462 | list_del_init(&cred->cr_lru); |
f5c2187c | 463 | } |
5f707eb4 | 464 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) { |
f0380f3d TM |
465 | if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) { |
466 | cred->cr_expire = jiffies; | |
467 | list_add_tail(&cred->cr_lru, &cred_unused); | |
468 | number_cred_unused++; | |
469 | goto out_nodestroy; | |
470 | } | |
471 | if (!rpcauth_unhash_cred(cred)) { | |
472 | /* We were hashed and someone looked us up... */ | |
473 | goto out_nodestroy; | |
474 | } | |
e092bdcd TM |
475 | } |
476 | spin_unlock(&rpc_credcache_lock); | |
1da177e4 | 477 | cred->cr_ops->crdestroy(cred); |
f0380f3d TM |
478 | return; |
479 | out_nodestroy: | |
480 | spin_unlock(&rpc_credcache_lock); | |
1da177e4 | 481 | } |
e8914c65 | 482 | EXPORT_SYMBOL_GPL(put_rpccred); |
1da177e4 LT |
483 | |
484 | void | |
485 | rpcauth_unbindcred(struct rpc_task *task) | |
486 | { | |
1da177e4 LT |
487 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
488 | ||
46121cf7 | 489 | dprintk("RPC: %5u releasing %s cred %p\n", |
1be27f36 | 490 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
1da177e4 LT |
491 | |
492 | put_rpccred(cred); | |
493 | task->tk_msg.rpc_cred = NULL; | |
494 | } | |
495 | ||
d8ed029d AD |
496 | __be32 * |
497 | rpcauth_marshcred(struct rpc_task *task, __be32 *p) | |
1da177e4 | 498 | { |
1da177e4 LT |
499 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
500 | ||
46121cf7 | 501 | dprintk("RPC: %5u marshaling %s cred %p\n", |
1be27f36 | 502 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 503 | |
1da177e4 LT |
504 | return cred->cr_ops->crmarshal(task, p); |
505 | } | |
506 | ||
d8ed029d AD |
507 | __be32 * |
508 | rpcauth_checkverf(struct rpc_task *task, __be32 *p) | |
1da177e4 | 509 | { |
1da177e4 LT |
510 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
511 | ||
46121cf7 | 512 | dprintk("RPC: %5u validating %s cred %p\n", |
1be27f36 | 513 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 514 | |
1da177e4 LT |
515 | return cred->cr_ops->crvalidate(task, p); |
516 | } | |
517 | ||
518 | int | |
519 | rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, | |
d8ed029d | 520 | __be32 *data, void *obj) |
1da177e4 LT |
521 | { |
522 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
523 | ||
46121cf7 | 524 | dprintk("RPC: %5u using %s cred %p to wrap rpc data\n", |
1da177e4 LT |
525 | task->tk_pid, cred->cr_ops->cr_name, cred); |
526 | if (cred->cr_ops->crwrap_req) | |
527 | return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj); | |
528 | /* By default, we encode the arguments normally. */ | |
88a9fe8c | 529 | return encode(rqstp, data, obj); |
1da177e4 LT |
530 | } |
531 | ||
532 | int | |
533 | rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, | |
d8ed029d | 534 | __be32 *data, void *obj) |
1da177e4 LT |
535 | { |
536 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
537 | ||
46121cf7 | 538 | dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n", |
1da177e4 LT |
539 | task->tk_pid, cred->cr_ops->cr_name, cred); |
540 | if (cred->cr_ops->crunwrap_resp) | |
541 | return cred->cr_ops->crunwrap_resp(task, decode, rqstp, | |
542 | data, obj); | |
543 | /* By default, we decode the arguments normally. */ | |
88a9fe8c | 544 | return decode(rqstp, data, obj); |
1da177e4 LT |
545 | } |
546 | ||
547 | int | |
548 | rpcauth_refreshcred(struct rpc_task *task) | |
549 | { | |
1da177e4 LT |
550 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
551 | int err; | |
552 | ||
46121cf7 | 553 | dprintk("RPC: %5u refreshing %s cred %p\n", |
1be27f36 | 554 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 555 | |
1da177e4 LT |
556 | err = cred->cr_ops->crrefresh(task); |
557 | if (err < 0) | |
558 | task->tk_status = err; | |
559 | return err; | |
560 | } | |
561 | ||
562 | void | |
563 | rpcauth_invalcred(struct rpc_task *task) | |
564 | { | |
fc432dd9 TM |
565 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
566 | ||
46121cf7 | 567 | dprintk("RPC: %5u invalidating %s cred %p\n", |
1be27f36 | 568 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
fc432dd9 TM |
569 | if (cred) |
570 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); | |
1da177e4 LT |
571 | } |
572 | ||
573 | int | |
574 | rpcauth_uptodatecred(struct rpc_task *task) | |
575 | { | |
fc432dd9 TM |
576 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
577 | ||
578 | return cred == NULL || | |
579 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0; | |
1da177e4 | 580 | } |
f5c2187c | 581 | |
8e1f936b RR |
582 | static struct shrinker rpc_cred_shrinker = { |
583 | .shrink = rpcauth_cache_shrinker, | |
584 | .seeks = DEFAULT_SEEKS, | |
585 | }; | |
f5c2187c TM |
586 | |
587 | void __init rpcauth_init_module(void) | |
588 | { | |
589 | rpc_init_authunix(); | |
9a559efd | 590 | rpc_init_generic_auth(); |
8e1f936b | 591 | register_shrinker(&rpc_cred_shrinker); |
f5c2187c TM |
592 | } |
593 | ||
594 | void __exit rpcauth_remove_module(void) | |
595 | { | |
8e1f936b | 596 | unregister_shrinker(&rpc_cred_shrinker); |
f5c2187c | 597 | } |