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; | |
988664a0 | 148 | unsigned int hashsize; |
1da177e4 LT |
149 | int i; |
150 | ||
8b3a7005 | 151 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
152 | if (!new) |
153 | return -ENOMEM; | |
988664a0 TM |
154 | new->hashbits = RPC_CREDCACHE_HASHBITS; |
155 | hashsize = 1U << new->hashbits; | |
156 | for (i = 0; i < hashsize; i++) | |
1da177e4 | 157 | INIT_HLIST_HEAD(&new->hashtable[i]); |
9499b434 | 158 | spin_lock_init(&new->lock); |
1da177e4 LT |
159 | auth->au_credcache = new; |
160 | return 0; | |
161 | } | |
e8914c65 | 162 | EXPORT_SYMBOL_GPL(rpcauth_init_credcache); |
1da177e4 LT |
163 | |
164 | /* | |
165 | * Destroy a list of credentials | |
166 | */ | |
167 | static inline | |
e092bdcd | 168 | void rpcauth_destroy_credlist(struct list_head *head) |
1da177e4 LT |
169 | { |
170 | struct rpc_cred *cred; | |
171 | ||
e092bdcd TM |
172 | while (!list_empty(head)) { |
173 | cred = list_entry(head->next, struct rpc_cred, cr_lru); | |
174 | list_del_init(&cred->cr_lru); | |
1da177e4 LT |
175 | put_rpccred(cred); |
176 | } | |
177 | } | |
178 | ||
179 | /* | |
180 | * Clear the RPC credential cache, and delete those credentials | |
181 | * that are not referenced. | |
182 | */ | |
183 | void | |
3ab9bb72 | 184 | rpcauth_clear_credcache(struct rpc_cred_cache *cache) |
1da177e4 | 185 | { |
e092bdcd TM |
186 | LIST_HEAD(free); |
187 | struct hlist_head *head; | |
1da177e4 | 188 | struct rpc_cred *cred; |
988664a0 | 189 | unsigned int hashsize = 1U << cache->hashbits; |
1da177e4 LT |
190 | int i; |
191 | ||
192 | spin_lock(&rpc_credcache_lock); | |
9499b434 | 193 | spin_lock(&cache->lock); |
988664a0 | 194 | for (i = 0; i < hashsize; i++) { |
e092bdcd TM |
195 | head = &cache->hashtable[i]; |
196 | while (!hlist_empty(head)) { | |
197 | cred = hlist_entry(head->first, struct rpc_cred, cr_hash); | |
198 | get_rpccred(cred); | |
f5c2187c TM |
199 | if (!list_empty(&cred->cr_lru)) { |
200 | list_del(&cred->cr_lru); | |
201 | number_cred_unused--; | |
202 | } | |
203 | list_add_tail(&cred->cr_lru, &free); | |
31be5bf1 | 204 | rpcauth_unhash_cred_locked(cred); |
1da177e4 LT |
205 | } |
206 | } | |
9499b434 | 207 | spin_unlock(&cache->lock); |
1da177e4 LT |
208 | spin_unlock(&rpc_credcache_lock); |
209 | rpcauth_destroy_credlist(&free); | |
210 | } | |
211 | ||
3ab9bb72 TM |
212 | /* |
213 | * Destroy the RPC credential cache | |
214 | */ | |
215 | void | |
216 | rpcauth_destroy_credcache(struct rpc_auth *auth) | |
217 | { | |
218 | struct rpc_cred_cache *cache = auth->au_credcache; | |
219 | ||
220 | if (cache) { | |
221 | auth->au_credcache = NULL; | |
222 | rpcauth_clear_credcache(cache); | |
223 | kfree(cache); | |
224 | } | |
225 | } | |
e8914c65 | 226 | EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache); |
3ab9bb72 | 227 | |
d2b83141 TM |
228 | |
229 | #define RPC_AUTH_EXPIRY_MORATORIUM (60 * HZ) | |
230 | ||
e092bdcd TM |
231 | /* |
232 | * Remove stale credentials. Avoid sleeping inside the loop. | |
233 | */ | |
f5c2187c TM |
234 | static int |
235 | rpcauth_prune_expired(struct list_head *free, int nr_to_scan) | |
1da177e4 | 236 | { |
9499b434 | 237 | spinlock_t *cache_lock; |
eac0d18d | 238 | struct rpc_cred *cred, *next; |
d2b83141 | 239 | unsigned long expired = jiffies - RPC_AUTH_EXPIRY_MORATORIUM; |
e092bdcd | 240 | |
eac0d18d TM |
241 | list_for_each_entry_safe(cred, next, &cred_unused, cr_lru) { |
242 | ||
20673406 TM |
243 | if (nr_to_scan-- == 0) |
244 | break; | |
93a05e65 TM |
245 | /* |
246 | * Enforce a 60 second garbage collection moratorium | |
247 | * Note that the cred_unused list must be time-ordered. | |
248 | */ | |
3d7b0894 | 249 | if (time_in_range(cred->cr_expire, expired, jiffies) && |
eac0d18d | 250 | test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) |
93a05e65 | 251 | return 0; |
eac0d18d | 252 | |
e092bdcd | 253 | list_del_init(&cred->cr_lru); |
f5c2187c | 254 | number_cred_unused--; |
e092bdcd TM |
255 | if (atomic_read(&cred->cr_count) != 0) |
256 | continue; | |
eac0d18d | 257 | |
9499b434 TM |
258 | cache_lock = &cred->cr_auth->au_credcache->lock; |
259 | spin_lock(cache_lock); | |
260 | if (atomic_read(&cred->cr_count) == 0) { | |
261 | get_rpccred(cred); | |
262 | list_add_tail(&cred->cr_lru, free); | |
263 | rpcauth_unhash_cred_locked(cred); | |
264 | } | |
265 | spin_unlock(cache_lock); | |
1da177e4 | 266 | } |
93a05e65 | 267 | return (number_cred_unused / 100) * sysctl_vfs_cache_pressure; |
1da177e4 LT |
268 | } |
269 | ||
270 | /* | |
f5c2187c | 271 | * Run memory cache shrinker. |
1da177e4 | 272 | */ |
f5c2187c TM |
273 | static int |
274 | rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask) | |
1da177e4 | 275 | { |
f5c2187c TM |
276 | LIST_HEAD(free); |
277 | int res; | |
278 | ||
d300a41e TM |
279 | if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL) |
280 | return (nr_to_scan == 0) ? 0 : -1; | |
f5c2187c TM |
281 | if (list_empty(&cred_unused)) |
282 | return 0; | |
31be5bf1 | 283 | spin_lock(&rpc_credcache_lock); |
93a05e65 | 284 | res = rpcauth_prune_expired(&free, nr_to_scan); |
31be5bf1 | 285 | spin_unlock(&rpc_credcache_lock); |
f5c2187c TM |
286 | rpcauth_destroy_credlist(&free); |
287 | return res; | |
1da177e4 LT |
288 | } |
289 | ||
290 | /* | |
291 | * Look up a process' credentials in the authentication cache | |
292 | */ | |
293 | struct rpc_cred * | |
294 | rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred, | |
8a317760 | 295 | int flags) |
1da177e4 | 296 | { |
e092bdcd | 297 | LIST_HEAD(free); |
1da177e4 | 298 | struct rpc_cred_cache *cache = auth->au_credcache; |
e092bdcd | 299 | struct hlist_node *pos; |
31be5bf1 TM |
300 | struct rpc_cred *cred = NULL, |
301 | *entry, *new; | |
25337fdc TM |
302 | unsigned int nr; |
303 | ||
988664a0 | 304 | nr = hash_long(acred->uid, cache->hashbits); |
1da177e4 | 305 | |
31be5bf1 TM |
306 | rcu_read_lock(); |
307 | hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) { | |
e092bdcd TM |
308 | if (!entry->cr_ops->crmatch(acred, entry, flags)) |
309 | continue; | |
9499b434 | 310 | spin_lock(&cache->lock); |
31be5bf1 | 311 | if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) { |
9499b434 | 312 | spin_unlock(&cache->lock); |
31be5bf1 TM |
313 | continue; |
314 | } | |
e092bdcd | 315 | cred = get_rpccred(entry); |
9499b434 | 316 | spin_unlock(&cache->lock); |
e092bdcd | 317 | break; |
1da177e4 | 318 | } |
31be5bf1 TM |
319 | rcu_read_unlock(); |
320 | ||
9499b434 | 321 | if (cred != NULL) |
31be5bf1 | 322 | goto found; |
1da177e4 | 323 | |
31be5bf1 TM |
324 | new = auth->au_ops->crcreate(auth, acred, flags); |
325 | if (IS_ERR(new)) { | |
326 | cred = new; | |
327 | goto out; | |
328 | } | |
1da177e4 | 329 | |
9499b434 | 330 | spin_lock(&cache->lock); |
31be5bf1 TM |
331 | hlist_for_each_entry(entry, pos, &cache->hashtable[nr], cr_hash) { |
332 | if (!entry->cr_ops->crmatch(acred, entry, flags)) | |
333 | continue; | |
334 | cred = get_rpccred(entry); | |
335 | break; | |
336 | } | |
337 | if (cred == NULL) { | |
5fe4755e | 338 | cred = new; |
31be5bf1 TM |
339 | set_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); |
340 | hlist_add_head_rcu(&cred->cr_hash, &cache->hashtable[nr]); | |
341 | } else | |
342 | list_add_tail(&new->cr_lru, &free); | |
9499b434 | 343 | spin_unlock(&cache->lock); |
31be5bf1 | 344 | found: |
f64f9e71 JP |
345 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && |
346 | cred->cr_ops->cr_init != NULL && | |
347 | !(flags & RPCAUTH_LOOKUP_NEW)) { | |
fba3bad4 TM |
348 | int res = cred->cr_ops->cr_init(auth, cred); |
349 | if (res < 0) { | |
350 | put_rpccred(cred); | |
351 | cred = ERR_PTR(res); | |
352 | } | |
1da177e4 | 353 | } |
31be5bf1 TM |
354 | rpcauth_destroy_credlist(&free); |
355 | out: | |
356 | return cred; | |
1da177e4 | 357 | } |
e8914c65 | 358 | EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache); |
1da177e4 LT |
359 | |
360 | struct rpc_cred * | |
8a317760 | 361 | rpcauth_lookupcred(struct rpc_auth *auth, int flags) |
1da177e4 | 362 | { |
86a264ab | 363 | struct auth_cred acred; |
1da177e4 | 364 | struct rpc_cred *ret; |
86a264ab | 365 | const struct cred *cred = current_cred(); |
1da177e4 | 366 | |
46121cf7 | 367 | dprintk("RPC: looking up %s cred\n", |
1da177e4 | 368 | auth->au_ops->au_name); |
86a264ab DH |
369 | |
370 | memset(&acred, 0, sizeof(acred)); | |
371 | acred.uid = cred->fsuid; | |
372 | acred.gid = cred->fsgid; | |
373 | acred.group_info = get_group_info(((struct cred *)cred)->group_info); | |
374 | ||
8a317760 | 375 | ret = auth->au_ops->lookup_cred(auth, &acred, flags); |
1da177e4 LT |
376 | put_group_info(acred.group_info); |
377 | return ret; | |
378 | } | |
379 | ||
5fe4755e TM |
380 | void |
381 | rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred, | |
382 | struct rpc_auth *auth, const struct rpc_credops *ops) | |
383 | { | |
384 | INIT_HLIST_NODE(&cred->cr_hash); | |
e092bdcd | 385 | INIT_LIST_HEAD(&cred->cr_lru); |
5fe4755e TM |
386 | atomic_set(&cred->cr_count, 1); |
387 | cred->cr_auth = auth; | |
388 | cred->cr_ops = ops; | |
389 | cred->cr_expire = jiffies; | |
390 | #ifdef RPC_DEBUG | |
391 | cred->cr_magic = RPCAUTH_CRED_MAGIC; | |
392 | #endif | |
393 | cred->cr_uid = acred->uid; | |
394 | } | |
e8914c65 | 395 | EXPORT_SYMBOL_GPL(rpcauth_init_cred); |
5fe4755e | 396 | |
5c691044 | 397 | void |
5d351754 | 398 | rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags) |
4ccda2cd TM |
399 | { |
400 | task->tk_msg.rpc_cred = get_rpccred(cred); | |
401 | dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid, | |
402 | cred->cr_auth->au_ops->au_name, cred); | |
403 | } | |
5c691044 | 404 | EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred); |
4ccda2cd TM |
405 | |
406 | static void | |
5d351754 | 407 | rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags) |
1da177e4 | 408 | { |
1be27f36 | 409 | struct rpc_auth *auth = task->tk_client->cl_auth; |
1da177e4 | 410 | struct auth_cred acred = { |
af093835 TM |
411 | .uid = 0, |
412 | .gid = 0, | |
1da177e4 LT |
413 | }; |
414 | struct rpc_cred *ret; | |
415 | ||
46121cf7 | 416 | dprintk("RPC: %5u looking up %s cred\n", |
1be27f36 | 417 | task->tk_pid, task->tk_client->cl_auth->au_ops->au_name); |
5d351754 | 418 | ret = auth->au_ops->lookup_cred(auth, &acred, lookupflags); |
af093835 TM |
419 | if (!IS_ERR(ret)) |
420 | task->tk_msg.rpc_cred = ret; | |
421 | else | |
422 | task->tk_status = PTR_ERR(ret); | |
423 | } | |
424 | ||
4ccda2cd | 425 | static void |
5d351754 | 426 | rpcauth_bind_new_cred(struct rpc_task *task, int lookupflags) |
af093835 TM |
427 | { |
428 | struct rpc_auth *auth = task->tk_client->cl_auth; | |
429 | struct rpc_cred *ret; | |
430 | ||
431 | dprintk("RPC: %5u looking up %s cred\n", | |
432 | task->tk_pid, auth->au_ops->au_name); | |
5d351754 | 433 | ret = rpcauth_lookupcred(auth, lookupflags); |
1da177e4 LT |
434 | if (!IS_ERR(ret)) |
435 | task->tk_msg.rpc_cred = ret; | |
436 | else | |
437 | task->tk_status = PTR_ERR(ret); | |
1da177e4 LT |
438 | } |
439 | ||
440 | void | |
4ccda2cd | 441 | rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags) |
1da177e4 | 442 | { |
5d351754 TM |
443 | int lookupflags = 0; |
444 | ||
445 | if (flags & RPC_TASK_ASYNC) | |
446 | lookupflags |= RPCAUTH_LOOKUP_NEW; | |
4ccda2cd | 447 | if (cred != NULL) |
5d351754 | 448 | cred->cr_ops->crbind(task, cred, lookupflags); |
4ccda2cd | 449 | else if (flags & RPC_TASK_ROOTCREDS) |
5d351754 | 450 | rpcauth_bind_root_cred(task, lookupflags); |
4ccda2cd | 451 | else |
5d351754 | 452 | rpcauth_bind_new_cred(task, lookupflags); |
1da177e4 LT |
453 | } |
454 | ||
455 | void | |
456 | put_rpccred(struct rpc_cred *cred) | |
457 | { | |
e092bdcd | 458 | /* Fast path for unhashed credentials */ |
f0380f3d TM |
459 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) == 0) { |
460 | if (atomic_dec_and_test(&cred->cr_count)) | |
461 | cred->cr_ops->crdestroy(cred); | |
1da177e4 | 462 | return; |
f0380f3d TM |
463 | } |
464 | ||
e092bdcd TM |
465 | if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock)) |
466 | return; | |
f5c2187c TM |
467 | if (!list_empty(&cred->cr_lru)) { |
468 | number_cred_unused--; | |
e092bdcd | 469 | list_del_init(&cred->cr_lru); |
f5c2187c | 470 | } |
5f707eb4 | 471 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) { |
f0380f3d TM |
472 | if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) { |
473 | cred->cr_expire = jiffies; | |
474 | list_add_tail(&cred->cr_lru, &cred_unused); | |
475 | number_cred_unused++; | |
476 | goto out_nodestroy; | |
477 | } | |
478 | if (!rpcauth_unhash_cred(cred)) { | |
479 | /* We were hashed and someone looked us up... */ | |
480 | goto out_nodestroy; | |
481 | } | |
e092bdcd TM |
482 | } |
483 | spin_unlock(&rpc_credcache_lock); | |
1da177e4 | 484 | cred->cr_ops->crdestroy(cred); |
f0380f3d TM |
485 | return; |
486 | out_nodestroy: | |
487 | spin_unlock(&rpc_credcache_lock); | |
1da177e4 | 488 | } |
e8914c65 | 489 | EXPORT_SYMBOL_GPL(put_rpccred); |
1da177e4 LT |
490 | |
491 | void | |
492 | rpcauth_unbindcred(struct rpc_task *task) | |
493 | { | |
1da177e4 LT |
494 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
495 | ||
46121cf7 | 496 | dprintk("RPC: %5u releasing %s cred %p\n", |
1be27f36 | 497 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
1da177e4 LT |
498 | |
499 | put_rpccred(cred); | |
500 | task->tk_msg.rpc_cred = NULL; | |
501 | } | |
502 | ||
d8ed029d AD |
503 | __be32 * |
504 | rpcauth_marshcred(struct rpc_task *task, __be32 *p) | |
1da177e4 | 505 | { |
1da177e4 LT |
506 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
507 | ||
46121cf7 | 508 | dprintk("RPC: %5u marshaling %s cred %p\n", |
1be27f36 | 509 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 510 | |
1da177e4 LT |
511 | return cred->cr_ops->crmarshal(task, p); |
512 | } | |
513 | ||
d8ed029d AD |
514 | __be32 * |
515 | rpcauth_checkverf(struct rpc_task *task, __be32 *p) | |
1da177e4 | 516 | { |
1da177e4 LT |
517 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
518 | ||
46121cf7 | 519 | dprintk("RPC: %5u validating %s cred %p\n", |
1be27f36 | 520 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 521 | |
1da177e4 LT |
522 | return cred->cr_ops->crvalidate(task, p); |
523 | } | |
524 | ||
525 | int | |
526 | rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, | |
d8ed029d | 527 | __be32 *data, void *obj) |
1da177e4 LT |
528 | { |
529 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
530 | ||
46121cf7 | 531 | dprintk("RPC: %5u using %s cred %p to wrap rpc data\n", |
1da177e4 LT |
532 | task->tk_pid, cred->cr_ops->cr_name, cred); |
533 | if (cred->cr_ops->crwrap_req) | |
534 | return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj); | |
535 | /* By default, we encode the arguments normally. */ | |
88a9fe8c | 536 | return encode(rqstp, data, obj); |
1da177e4 LT |
537 | } |
538 | ||
539 | int | |
540 | rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, | |
d8ed029d | 541 | __be32 *data, void *obj) |
1da177e4 LT |
542 | { |
543 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
544 | ||
46121cf7 | 545 | dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n", |
1da177e4 LT |
546 | task->tk_pid, cred->cr_ops->cr_name, cred); |
547 | if (cred->cr_ops->crunwrap_resp) | |
548 | return cred->cr_ops->crunwrap_resp(task, decode, rqstp, | |
549 | data, obj); | |
550 | /* By default, we decode the arguments normally. */ | |
88a9fe8c | 551 | return decode(rqstp, data, obj); |
1da177e4 LT |
552 | } |
553 | ||
554 | int | |
555 | rpcauth_refreshcred(struct rpc_task *task) | |
556 | { | |
1da177e4 LT |
557 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
558 | int err; | |
559 | ||
46121cf7 | 560 | dprintk("RPC: %5u refreshing %s cred %p\n", |
1be27f36 | 561 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
0bbacc40 | 562 | |
1da177e4 LT |
563 | err = cred->cr_ops->crrefresh(task); |
564 | if (err < 0) | |
565 | task->tk_status = err; | |
566 | return err; | |
567 | } | |
568 | ||
569 | void | |
570 | rpcauth_invalcred(struct rpc_task *task) | |
571 | { | |
fc432dd9 TM |
572 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
573 | ||
46121cf7 | 574 | dprintk("RPC: %5u invalidating %s cred %p\n", |
1be27f36 | 575 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
fc432dd9 TM |
576 | if (cred) |
577 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); | |
1da177e4 LT |
578 | } |
579 | ||
580 | int | |
581 | rpcauth_uptodatecred(struct rpc_task *task) | |
582 | { | |
fc432dd9 TM |
583 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
584 | ||
585 | return cred == NULL || | |
586 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0; | |
1da177e4 | 587 | } |
f5c2187c | 588 | |
8e1f936b RR |
589 | static struct shrinker rpc_cred_shrinker = { |
590 | .shrink = rpcauth_cache_shrinker, | |
591 | .seeks = DEFAULT_SEEKS, | |
592 | }; | |
f5c2187c | 593 | |
5d8d9a4d | 594 | int __init rpcauth_init_module(void) |
f5c2187c | 595 | { |
5d8d9a4d TM |
596 | int err; |
597 | ||
598 | err = rpc_init_authunix(); | |
599 | if (err < 0) | |
600 | goto out1; | |
601 | err = rpc_init_generic_auth(); | |
602 | if (err < 0) | |
603 | goto out2; | |
8e1f936b | 604 | register_shrinker(&rpc_cred_shrinker); |
5d8d9a4d TM |
605 | return 0; |
606 | out2: | |
607 | rpc_destroy_authunix(); | |
608 | out1: | |
609 | return err; | |
f5c2187c TM |
610 | } |
611 | ||
612 | void __exit rpcauth_remove_module(void) | |
613 | { | |
5d8d9a4d TM |
614 | rpc_destroy_authunix(); |
615 | rpc_destroy_generic_auth(); | |
8e1f936b | 616 | unregister_shrinker(&rpc_cred_shrinker); |
f5c2187c | 617 | } |