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