Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
f30c2269 | 2 | * linux/net/sunrpc/auth_gss/auth_gss.c |
1da177e4 LT |
3 | * |
4 | * RPCSEC_GSS client authentication. | |
cca5172a | 5 | * |
1da177e4 LT |
6 | * Copyright (c) 2000 The Regents of the University of Michigan. |
7 | * All rights reserved. | |
8 | * | |
9 | * Dug Song <dugsong@monkey.org> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
1da177e4 LT |
36 | */ |
37 | ||
38 | ||
39 | #include <linux/module.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/types.h> | |
42 | #include <linux/slab.h> | |
1da177e4 | 43 | #include <linux/sched.h> |
2d2da60c | 44 | #include <linux/pagemap.h> |
1da177e4 LT |
45 | #include <linux/sunrpc/clnt.h> |
46 | #include <linux/sunrpc/auth.h> | |
47 | #include <linux/sunrpc/auth_gss.h> | |
48 | #include <linux/sunrpc/svcauth_gss.h> | |
49 | #include <linux/sunrpc/gss_err.h> | |
50 | #include <linux/workqueue.h> | |
51 | #include <linux/sunrpc/rpc_pipe_fs.h> | |
52 | #include <linux/sunrpc/gss_api.h> | |
53 | #include <asm/uaccess.h> | |
54 | ||
f1c0a861 | 55 | static const struct rpc_authops authgss_ops; |
1da177e4 | 56 | |
f1c0a861 | 57 | static const struct rpc_credops gss_credops; |
0df7fb74 | 58 | static const struct rpc_credops gss_nullops; |
1da177e4 LT |
59 | |
60 | #ifdef RPC_DEBUG | |
61 | # define RPCDBG_FACILITY RPCDBG_AUTH | |
62 | #endif | |
63 | ||
d25a03cf | 64 | #define GSS_CRED_SLACK 1024 |
1da177e4 LT |
65 | /* length of a krb5 verifier (48), plus data added before arguments when |
66 | * using integrity (two 4-byte integers): */ | |
adeb8133 | 67 | #define GSS_VERF_SLACK 100 |
1da177e4 | 68 | |
1da177e4 | 69 | struct gss_auth { |
0285ed1f | 70 | struct kref kref; |
1da177e4 LT |
71 | struct rpc_auth rpc_auth; |
72 | struct gss_api_mech *mech; | |
73 | enum rpc_gss_svc service; | |
1da177e4 LT |
74 | struct rpc_clnt *client; |
75 | struct dentry *dentry; | |
1da177e4 LT |
76 | }; |
77 | ||
79a3f20b BF |
78 | /* pipe_version >= 0 if and only if someone has a pipe open. */ |
79 | static int pipe_version = -1; | |
cf81939d | 80 | static atomic_t pipe_users = ATOMIC_INIT(0); |
79a3f20b BF |
81 | static DEFINE_SPINLOCK(pipe_version_lock); |
82 | static struct rpc_wait_queue pipe_version_rpc_waitqueue; | |
83 | static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); | |
cf81939d | 84 | |
5d28dc82 | 85 | static void gss_free_ctx(struct gss_cl_ctx *); |
1da177e4 LT |
86 | static struct rpc_pipe_ops gss_upcall_ops; |
87 | ||
1da177e4 LT |
88 | static inline struct gss_cl_ctx * |
89 | gss_get_ctx(struct gss_cl_ctx *ctx) | |
90 | { | |
91 | atomic_inc(&ctx->count); | |
92 | return ctx; | |
93 | } | |
94 | ||
95 | static inline void | |
96 | gss_put_ctx(struct gss_cl_ctx *ctx) | |
97 | { | |
98 | if (atomic_dec_and_test(&ctx->count)) | |
5d28dc82 | 99 | gss_free_ctx(ctx); |
1da177e4 LT |
100 | } |
101 | ||
5d28dc82 TM |
102 | /* gss_cred_set_ctx: |
103 | * called by gss_upcall_callback and gss_create_upcall in order | |
104 | * to set the gss context. The actual exchange of an old context | |
105 | * and a new one is protected by the inode->i_lock. | |
106 | */ | |
1da177e4 LT |
107 | static void |
108 | gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) | |
109 | { | |
110 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
5d28dc82 | 111 | |
cd019f75 TM |
112 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
113 | return; | |
7b6962b0 | 114 | gss_get_ctx(ctx); |
5d28dc82 | 115 | rcu_assign_pointer(gss_cred->gc_ctx, ctx); |
fc432dd9 | 116 | set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
cd019f75 | 117 | smp_mb__before_clear_bit(); |
fc432dd9 | 118 | clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); |
1da177e4 LT |
119 | } |
120 | ||
121 | static const void * | |
122 | simple_get_bytes(const void *p, const void *end, void *res, size_t len) | |
123 | { | |
124 | const void *q = (const void *)((const char *)p + len); | |
125 | if (unlikely(q > end || q < p)) | |
126 | return ERR_PTR(-EFAULT); | |
127 | memcpy(res, p, len); | |
128 | return q; | |
129 | } | |
130 | ||
131 | static inline const void * | |
132 | simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) | |
133 | { | |
134 | const void *q; | |
135 | unsigned int len; | |
136 | ||
137 | p = simple_get_bytes(p, end, &len, sizeof(len)); | |
138 | if (IS_ERR(p)) | |
139 | return p; | |
140 | q = (const void *)((const char *)p + len); | |
141 | if (unlikely(q > end || q < p)) | |
142 | return ERR_PTR(-EFAULT); | |
0f38b873 | 143 | dest->data = kmemdup(p, len, GFP_NOFS); |
1da177e4 LT |
144 | if (unlikely(dest->data == NULL)) |
145 | return ERR_PTR(-ENOMEM); | |
146 | dest->len = len; | |
1da177e4 LT |
147 | return q; |
148 | } | |
149 | ||
150 | static struct gss_cl_ctx * | |
151 | gss_cred_get_ctx(struct rpc_cred *cred) | |
152 | { | |
153 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
154 | struct gss_cl_ctx *ctx = NULL; | |
155 | ||
5d28dc82 | 156 | rcu_read_lock(); |
1da177e4 LT |
157 | if (gss_cred->gc_ctx) |
158 | ctx = gss_get_ctx(gss_cred->gc_ctx); | |
5d28dc82 | 159 | rcu_read_unlock(); |
1da177e4 LT |
160 | return ctx; |
161 | } | |
162 | ||
163 | static struct gss_cl_ctx * | |
164 | gss_alloc_context(void) | |
165 | { | |
166 | struct gss_cl_ctx *ctx; | |
167 | ||
0f38b873 | 168 | ctx = kzalloc(sizeof(*ctx), GFP_NOFS); |
1da177e4 | 169 | if (ctx != NULL) { |
1da177e4 LT |
170 | ctx->gc_proc = RPC_GSS_PROC_DATA; |
171 | ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ | |
172 | spin_lock_init(&ctx->gc_seq_lock); | |
173 | atomic_set(&ctx->count,1); | |
174 | } | |
175 | return ctx; | |
176 | } | |
177 | ||
178 | #define GSSD_MIN_TIMEOUT (60 * 60) | |
179 | static const void * | |
180 | gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) | |
181 | { | |
182 | const void *q; | |
183 | unsigned int seclen; | |
184 | unsigned int timeout; | |
185 | u32 window_size; | |
186 | int ret; | |
187 | ||
188 | /* First unsigned int gives the lifetime (in seconds) of the cred */ | |
189 | p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); | |
190 | if (IS_ERR(p)) | |
191 | goto err; | |
192 | if (timeout == 0) | |
193 | timeout = GSSD_MIN_TIMEOUT; | |
194 | ctx->gc_expiry = jiffies + (unsigned long)timeout * HZ * 3 / 4; | |
195 | /* Sequence number window. Determines the maximum number of simultaneous requests */ | |
196 | p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); | |
197 | if (IS_ERR(p)) | |
198 | goto err; | |
199 | ctx->gc_win = window_size; | |
200 | /* gssd signals an error by passing ctx->gc_win = 0: */ | |
201 | if (ctx->gc_win == 0) { | |
202 | /* in which case, p points to an error code which we ignore */ | |
203 | p = ERR_PTR(-EACCES); | |
204 | goto err; | |
205 | } | |
206 | /* copy the opaque wire context */ | |
207 | p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); | |
208 | if (IS_ERR(p)) | |
209 | goto err; | |
210 | /* import the opaque security context */ | |
211 | p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); | |
212 | if (IS_ERR(p)) | |
213 | goto err; | |
214 | q = (const void *)((const char *)p + seclen); | |
215 | if (unlikely(q > end || q < p)) { | |
216 | p = ERR_PTR(-EFAULT); | |
217 | goto err; | |
218 | } | |
219 | ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx); | |
220 | if (ret < 0) { | |
221 | p = ERR_PTR(ret); | |
222 | goto err; | |
223 | } | |
224 | return q; | |
225 | err: | |
8885cb36 | 226 | dprintk("RPC: gss_fill_context returning %ld\n", -PTR_ERR(p)); |
1da177e4 LT |
227 | return p; |
228 | } | |
229 | ||
230 | ||
231 | struct gss_upcall_msg { | |
232 | atomic_t count; | |
233 | uid_t uid; | |
234 | struct rpc_pipe_msg msg; | |
235 | struct list_head list; | |
236 | struct gss_auth *auth; | |
5b7ddd4a | 237 | struct rpc_inode *inode; |
1da177e4 LT |
238 | struct rpc_wait_queue rpc_waitqueue; |
239 | wait_queue_head_t waitqueue; | |
240 | struct gss_cl_ctx *ctx; | |
241 | }; | |
242 | ||
79a3f20b BF |
243 | static int get_pipe_version(void) |
244 | { | |
245 | int ret; | |
246 | ||
247 | spin_lock(&pipe_version_lock); | |
248 | if (pipe_version >= 0) { | |
249 | atomic_inc(&pipe_users); | |
250 | ret = 0; | |
251 | } else | |
252 | ret = -EAGAIN; | |
253 | spin_unlock(&pipe_version_lock); | |
254 | return ret; | |
255 | } | |
256 | ||
257 | static void put_pipe_version(void) | |
258 | { | |
259 | if (atomic_dec_and_lock(&pipe_users, &pipe_version_lock)) { | |
260 | pipe_version = -1; | |
261 | spin_unlock(&pipe_version_lock); | |
262 | } | |
263 | } | |
264 | ||
1da177e4 LT |
265 | static void |
266 | gss_release_msg(struct gss_upcall_msg *gss_msg) | |
267 | { | |
268 | if (!atomic_dec_and_test(&gss_msg->count)) | |
269 | return; | |
79a3f20b | 270 | put_pipe_version(); |
1da177e4 LT |
271 | BUG_ON(!list_empty(&gss_msg->list)); |
272 | if (gss_msg->ctx != NULL) | |
273 | gss_put_ctx(gss_msg->ctx); | |
f6a1cc89 | 274 | rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); |
1da177e4 LT |
275 | kfree(gss_msg); |
276 | } | |
277 | ||
278 | static struct gss_upcall_msg * | |
6e84c7b6 | 279 | __gss_find_upcall(struct rpc_inode *rpci, uid_t uid) |
1da177e4 LT |
280 | { |
281 | struct gss_upcall_msg *pos; | |
6e84c7b6 | 282 | list_for_each_entry(pos, &rpci->in_downcall, list) { |
1da177e4 LT |
283 | if (pos->uid != uid) |
284 | continue; | |
285 | atomic_inc(&pos->count); | |
8885cb36 | 286 | dprintk("RPC: gss_find_upcall found msg %p\n", pos); |
1da177e4 LT |
287 | return pos; |
288 | } | |
8885cb36 | 289 | dprintk("RPC: gss_find_upcall found nothing\n"); |
1da177e4 LT |
290 | return NULL; |
291 | } | |
292 | ||
720b8f2d | 293 | /* Try to add an upcall to the pipefs queue. |
1da177e4 LT |
294 | * If an upcall owned by our uid already exists, then we return a reference |
295 | * to that upcall instead of adding the new upcall. | |
296 | */ | |
297 | static inline struct gss_upcall_msg * | |
298 | gss_add_msg(struct gss_auth *gss_auth, struct gss_upcall_msg *gss_msg) | |
299 | { | |
5b7ddd4a BF |
300 | struct rpc_inode *rpci = gss_msg->inode; |
301 | struct inode *inode = &rpci->vfs_inode; | |
1da177e4 LT |
302 | struct gss_upcall_msg *old; |
303 | ||
b185f835 | 304 | spin_lock(&inode->i_lock); |
6e84c7b6 | 305 | old = __gss_find_upcall(rpci, gss_msg->uid); |
1da177e4 LT |
306 | if (old == NULL) { |
307 | atomic_inc(&gss_msg->count); | |
6e84c7b6 | 308 | list_add(&gss_msg->list, &rpci->in_downcall); |
1da177e4 LT |
309 | } else |
310 | gss_msg = old; | |
b185f835 | 311 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
312 | return gss_msg; |
313 | } | |
314 | ||
315 | static void | |
316 | __gss_unhash_msg(struct gss_upcall_msg *gss_msg) | |
317 | { | |
1da177e4 LT |
318 | list_del_init(&gss_msg->list); |
319 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); | |
320 | wake_up_all(&gss_msg->waitqueue); | |
321 | atomic_dec(&gss_msg->count); | |
322 | } | |
323 | ||
324 | static void | |
325 | gss_unhash_msg(struct gss_upcall_msg *gss_msg) | |
326 | { | |
5b7ddd4a | 327 | struct inode *inode = &gss_msg->inode->vfs_inode; |
1da177e4 | 328 | |
3b68aaea TM |
329 | if (list_empty(&gss_msg->list)) |
330 | return; | |
b185f835 | 331 | spin_lock(&inode->i_lock); |
3b68aaea TM |
332 | if (!list_empty(&gss_msg->list)) |
333 | __gss_unhash_msg(gss_msg); | |
b185f835 | 334 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
335 | } |
336 | ||
337 | static void | |
338 | gss_upcall_callback(struct rpc_task *task) | |
339 | { | |
340 | struct gss_cred *gss_cred = container_of(task->tk_msg.rpc_cred, | |
341 | struct gss_cred, gc_base); | |
342 | struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; | |
5b7ddd4a | 343 | struct inode *inode = &gss_msg->inode->vfs_inode; |
1da177e4 | 344 | |
5d28dc82 | 345 | spin_lock(&inode->i_lock); |
1da177e4 | 346 | if (gss_msg->ctx) |
7b6962b0 | 347 | gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx); |
1da177e4 LT |
348 | else |
349 | task->tk_status = gss_msg->msg.errno; | |
1da177e4 LT |
350 | gss_cred->gc_upcall = NULL; |
351 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); | |
b185f835 | 352 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
353 | gss_release_msg(gss_msg); |
354 | } | |
355 | ||
356 | static inline struct gss_upcall_msg * | |
357 | gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) | |
358 | { | |
359 | struct gss_upcall_msg *gss_msg; | |
79a3f20b | 360 | int vers; |
1da177e4 | 361 | |
0f38b873 | 362 | gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); |
db75b3d6 BF |
363 | if (gss_msg == NULL) |
364 | return ERR_PTR(-ENOMEM); | |
79a3f20b BF |
365 | vers = get_pipe_version(); |
366 | if (vers < 0) { | |
367 | kfree(gss_msg); | |
368 | return ERR_PTR(vers); | |
369 | } | |
5b7ddd4a | 370 | gss_msg->inode = RPC_I(gss_auth->dentry->d_inode); |
db75b3d6 BF |
371 | INIT_LIST_HEAD(&gss_msg->list); |
372 | rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); | |
373 | init_waitqueue_head(&gss_msg->waitqueue); | |
374 | atomic_set(&gss_msg->count, 1); | |
375 | gss_msg->msg.data = &gss_msg->uid; | |
376 | gss_msg->msg.len = sizeof(gss_msg->uid); | |
377 | gss_msg->uid = uid; | |
378 | gss_msg->auth = gss_auth; | |
1da177e4 LT |
379 | return gss_msg; |
380 | } | |
381 | ||
382 | static struct gss_upcall_msg * | |
383 | gss_setup_upcall(struct rpc_clnt *clnt, struct gss_auth *gss_auth, struct rpc_cred *cred) | |
384 | { | |
7c67db3a TM |
385 | struct gss_cred *gss_cred = container_of(cred, |
386 | struct gss_cred, gc_base); | |
1da177e4 | 387 | struct gss_upcall_msg *gss_new, *gss_msg; |
7c67db3a | 388 | uid_t uid = cred->cr_uid; |
1da177e4 | 389 | |
7c67db3a TM |
390 | /* Special case: rpc.gssd assumes that uid == 0 implies machine creds */ |
391 | if (gss_cred->gc_machine_cred != 0) | |
392 | uid = 0; | |
393 | ||
394 | gss_new = gss_alloc_msg(gss_auth, uid); | |
db75b3d6 BF |
395 | if (IS_ERR(gss_new)) |
396 | return gss_new; | |
1da177e4 LT |
397 | gss_msg = gss_add_msg(gss_auth, gss_new); |
398 | if (gss_msg == gss_new) { | |
5b7ddd4a BF |
399 | struct inode *inode = &gss_new->inode->vfs_inode; |
400 | int res = rpc_queue_upcall(inode, &gss_new->msg); | |
1da177e4 LT |
401 | if (res) { |
402 | gss_unhash_msg(gss_new); | |
403 | gss_msg = ERR_PTR(res); | |
404 | } | |
405 | } else | |
406 | gss_release_msg(gss_new); | |
407 | return gss_msg; | |
408 | } | |
409 | ||
b03568c3 BF |
410 | static void warn_gssd(void) |
411 | { | |
412 | static unsigned long ratelimit; | |
413 | unsigned long now = jiffies; | |
414 | ||
415 | if (time_after(now, ratelimit)) { | |
416 | printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" | |
417 | "Please check user daemon is running.\n"); | |
418 | ratelimit = now + 15*HZ; | |
419 | } | |
420 | } | |
421 | ||
1da177e4 LT |
422 | static inline int |
423 | gss_refresh_upcall(struct rpc_task *task) | |
424 | { | |
425 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
4a8c1344 | 426 | struct gss_auth *gss_auth = container_of(cred->cr_auth, |
1da177e4 LT |
427 | struct gss_auth, rpc_auth); |
428 | struct gss_cred *gss_cred = container_of(cred, | |
429 | struct gss_cred, gc_base); | |
430 | struct gss_upcall_msg *gss_msg; | |
5b7ddd4a | 431 | struct inode *inode; |
1da177e4 LT |
432 | int err = 0; |
433 | ||
8885cb36 CL |
434 | dprintk("RPC: %5u gss_refresh_upcall for uid %u\n", task->tk_pid, |
435 | cred->cr_uid); | |
1da177e4 | 436 | gss_msg = gss_setup_upcall(task->tk_client, gss_auth, cred); |
79a3f20b BF |
437 | if (IS_ERR(gss_msg) == -EAGAIN) { |
438 | /* XXX: warning on the first, under the assumption we | |
439 | * shouldn't normally hit this case on a refresh. */ | |
440 | warn_gssd(); | |
441 | task->tk_timeout = 15*HZ; | |
442 | rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); | |
443 | return 0; | |
444 | } | |
1da177e4 LT |
445 | if (IS_ERR(gss_msg)) { |
446 | err = PTR_ERR(gss_msg); | |
447 | goto out; | |
448 | } | |
5b7ddd4a | 449 | inode = &gss_msg->inode->vfs_inode; |
b185f835 | 450 | spin_lock(&inode->i_lock); |
1da177e4 | 451 | if (gss_cred->gc_upcall != NULL) |
5d00837b | 452 | rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); |
7b6962b0 TM |
453 | else if (gss_msg->ctx != NULL) { |
454 | gss_cred_set_ctx(task->tk_msg.rpc_cred, gss_msg->ctx); | |
455 | gss_cred->gc_upcall = NULL; | |
456 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); | |
457 | } else if (gss_msg->msg.errno >= 0) { | |
1da177e4 LT |
458 | task->tk_timeout = 0; |
459 | gss_cred->gc_upcall = gss_msg; | |
460 | /* gss_upcall_callback will release the reference to gss_upcall_msg */ | |
461 | atomic_inc(&gss_msg->count); | |
5d00837b | 462 | rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); |
1da177e4 LT |
463 | } else |
464 | err = gss_msg->msg.errno; | |
b185f835 | 465 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
466 | gss_release_msg(gss_msg); |
467 | out: | |
8885cb36 CL |
468 | dprintk("RPC: %5u gss_refresh_upcall for uid %u result %d\n", |
469 | task->tk_pid, cred->cr_uid, err); | |
1da177e4 LT |
470 | return err; |
471 | } | |
472 | ||
473 | static inline int | |
474 | gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) | |
475 | { | |
5b7ddd4a | 476 | struct inode *inode; |
1da177e4 LT |
477 | struct rpc_cred *cred = &gss_cred->gc_base; |
478 | struct gss_upcall_msg *gss_msg; | |
479 | DEFINE_WAIT(wait); | |
480 | int err = 0; | |
481 | ||
8885cb36 | 482 | dprintk("RPC: gss_upcall for uid %u\n", cred->cr_uid); |
79a3f20b | 483 | retry: |
1da177e4 | 484 | gss_msg = gss_setup_upcall(gss_auth->client, gss_auth, cred); |
79a3f20b BF |
485 | if (PTR_ERR(gss_msg) == -EAGAIN) { |
486 | err = wait_event_interruptible_timeout(pipe_version_waitqueue, | |
487 | pipe_version >= 0, 15*HZ); | |
488 | if (err) | |
489 | goto out; | |
490 | if (pipe_version < 0) | |
491 | warn_gssd(); | |
492 | goto retry; | |
493 | } | |
1da177e4 LT |
494 | if (IS_ERR(gss_msg)) { |
495 | err = PTR_ERR(gss_msg); | |
496 | goto out; | |
497 | } | |
5b7ddd4a | 498 | inode = &gss_msg->inode->vfs_inode; |
1da177e4 LT |
499 | for (;;) { |
500 | prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_INTERRUPTIBLE); | |
b185f835 | 501 | spin_lock(&inode->i_lock); |
1da177e4 | 502 | if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { |
1da177e4 LT |
503 | break; |
504 | } | |
b185f835 | 505 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
506 | if (signalled()) { |
507 | err = -ERESTARTSYS; | |
508 | goto out_intr; | |
509 | } | |
510 | schedule(); | |
511 | } | |
512 | if (gss_msg->ctx) | |
7b6962b0 | 513 | gss_cred_set_ctx(cred, gss_msg->ctx); |
1da177e4 LT |
514 | else |
515 | err = gss_msg->msg.errno; | |
5d28dc82 | 516 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
517 | out_intr: |
518 | finish_wait(&gss_msg->waitqueue, &wait); | |
519 | gss_release_msg(gss_msg); | |
520 | out: | |
8885cb36 CL |
521 | dprintk("RPC: gss_create_upcall for uid %u result %d\n", |
522 | cred->cr_uid, err); | |
1da177e4 LT |
523 | return err; |
524 | } | |
525 | ||
526 | static ssize_t | |
527 | gss_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, | |
528 | char __user *dst, size_t buflen) | |
529 | { | |
530 | char *data = (char *)msg->data + msg->copied; | |
7df08995 CL |
531 | size_t mlen = min(msg->len, buflen); |
532 | unsigned long left; | |
1da177e4 | 533 | |
1da177e4 | 534 | left = copy_to_user(dst, data, mlen); |
7df08995 CL |
535 | if (left == mlen) { |
536 | msg->errno = -EFAULT; | |
537 | return -EFAULT; | |
1da177e4 | 538 | } |
7df08995 | 539 | |
1da177e4 LT |
540 | mlen -= left; |
541 | msg->copied += mlen; | |
542 | msg->errno = 0; | |
543 | return mlen; | |
544 | } | |
545 | ||
546 | #define MSG_BUF_MAXSIZE 1024 | |
547 | ||
548 | static ssize_t | |
549 | gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) | |
550 | { | |
551 | const void *p, *end; | |
552 | void *buf; | |
1da177e4 | 553 | struct gss_upcall_msg *gss_msg; |
b185f835 | 554 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
555 | struct gss_cl_ctx *ctx; |
556 | uid_t uid; | |
3b68aaea | 557 | ssize_t err = -EFBIG; |
1da177e4 LT |
558 | |
559 | if (mlen > MSG_BUF_MAXSIZE) | |
560 | goto out; | |
561 | err = -ENOMEM; | |
0f38b873 | 562 | buf = kmalloc(mlen, GFP_NOFS); |
1da177e4 LT |
563 | if (!buf) |
564 | goto out; | |
565 | ||
1da177e4 LT |
566 | err = -EFAULT; |
567 | if (copy_from_user(buf, src, mlen)) | |
568 | goto err; | |
569 | ||
570 | end = (const void *)((char *)buf + mlen); | |
571 | p = simple_get_bytes(buf, end, &uid, sizeof(uid)); | |
572 | if (IS_ERR(p)) { | |
573 | err = PTR_ERR(p); | |
574 | goto err; | |
575 | } | |
576 | ||
577 | err = -ENOMEM; | |
578 | ctx = gss_alloc_context(); | |
579 | if (ctx == NULL) | |
580 | goto err; | |
3b68aaea TM |
581 | |
582 | err = -ENOENT; | |
583 | /* Find a matching upcall */ | |
3b68aaea | 584 | spin_lock(&inode->i_lock); |
6e84c7b6 | 585 | gss_msg = __gss_find_upcall(RPC_I(inode), uid); |
3b68aaea TM |
586 | if (gss_msg == NULL) { |
587 | spin_unlock(&inode->i_lock); | |
588 | goto err_put_ctx; | |
589 | } | |
590 | list_del_init(&gss_msg->list); | |
591 | spin_unlock(&inode->i_lock); | |
592 | ||
6e84c7b6 | 593 | p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); |
1da177e4 LT |
594 | if (IS_ERR(p)) { |
595 | err = PTR_ERR(p); | |
ffc40f56 | 596 | gss_msg->msg.errno = (err == -EAGAIN) ? -EAGAIN : -EACCES; |
3b68aaea | 597 | goto err_release_msg; |
1da177e4 | 598 | } |
3b68aaea TM |
599 | gss_msg->ctx = gss_get_ctx(ctx); |
600 | err = mlen; | |
601 | ||
602 | err_release_msg: | |
b185f835 | 603 | spin_lock(&inode->i_lock); |
3b68aaea TM |
604 | __gss_unhash_msg(gss_msg); |
605 | spin_unlock(&inode->i_lock); | |
606 | gss_release_msg(gss_msg); | |
1da177e4 LT |
607 | err_put_ctx: |
608 | gss_put_ctx(ctx); | |
609 | err: | |
610 | kfree(buf); | |
611 | out: | |
3b68aaea | 612 | dprintk("RPC: gss_pipe_downcall returning %Zd\n", err); |
1da177e4 LT |
613 | return err; |
614 | } | |
615 | ||
cf81939d BF |
616 | static int |
617 | gss_pipe_open(struct inode *inode) | |
618 | { | |
79a3f20b BF |
619 | spin_lock(&pipe_version_lock); |
620 | if (pipe_version < 0) { | |
621 | pipe_version = 0; | |
622 | rpc_wake_up(&pipe_version_rpc_waitqueue); | |
623 | wake_up(&pipe_version_waitqueue); | |
624 | } | |
cf81939d | 625 | atomic_inc(&pipe_users); |
79a3f20b | 626 | spin_unlock(&pipe_version_lock); |
cf81939d BF |
627 | return 0; |
628 | } | |
629 | ||
1da177e4 LT |
630 | static void |
631 | gss_pipe_release(struct inode *inode) | |
632 | { | |
633 | struct rpc_inode *rpci = RPC_I(inode); | |
6e84c7b6 | 634 | struct gss_upcall_msg *gss_msg; |
1da177e4 | 635 | |
b185f835 | 636 | spin_lock(&inode->i_lock); |
6e84c7b6 | 637 | while (!list_empty(&rpci->in_downcall)) { |
1da177e4 | 638 | |
6e84c7b6 | 639 | gss_msg = list_entry(rpci->in_downcall.next, |
1da177e4 LT |
640 | struct gss_upcall_msg, list); |
641 | gss_msg->msg.errno = -EPIPE; | |
642 | atomic_inc(&gss_msg->count); | |
643 | __gss_unhash_msg(gss_msg); | |
b185f835 | 644 | spin_unlock(&inode->i_lock); |
1da177e4 | 645 | gss_release_msg(gss_msg); |
b185f835 | 646 | spin_lock(&inode->i_lock); |
1da177e4 | 647 | } |
b185f835 | 648 | spin_unlock(&inode->i_lock); |
cf81939d | 649 | |
79a3f20b | 650 | put_pipe_version(); |
1da177e4 LT |
651 | } |
652 | ||
653 | static void | |
654 | gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) | |
655 | { | |
656 | struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); | |
1da177e4 LT |
657 | |
658 | if (msg->errno < 0) { | |
8885cb36 | 659 | dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", |
1da177e4 LT |
660 | gss_msg); |
661 | atomic_inc(&gss_msg->count); | |
662 | gss_unhash_msg(gss_msg); | |
b03568c3 BF |
663 | if (msg->errno == -ETIMEDOUT) |
664 | warn_gssd(); | |
1da177e4 LT |
665 | gss_release_msg(gss_msg); |
666 | } | |
667 | } | |
668 | ||
cca5172a YH |
669 | /* |
670 | * NOTE: we have the opportunity to use different | |
1da177e4 LT |
671 | * parameters based on the input flavor (which must be a pseudoflavor) |
672 | */ | |
673 | static struct rpc_auth * | |
674 | gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) | |
675 | { | |
676 | struct gss_auth *gss_auth; | |
677 | struct rpc_auth * auth; | |
6a19275a | 678 | int err = -ENOMEM; /* XXX? */ |
1da177e4 | 679 | |
8885cb36 | 680 | dprintk("RPC: creating GSS authenticator for client %p\n", clnt); |
1da177e4 LT |
681 | |
682 | if (!try_module_get(THIS_MODULE)) | |
6a19275a | 683 | return ERR_PTR(err); |
1da177e4 LT |
684 | if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) |
685 | goto out_dec; | |
686 | gss_auth->client = clnt; | |
6a19275a | 687 | err = -EINVAL; |
1da177e4 LT |
688 | gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); |
689 | if (!gss_auth->mech) { | |
3392c349 | 690 | printk(KERN_WARNING "%s: Pseudoflavor %d not found!\n", |
0dc47877 | 691 | __func__, flavor); |
1da177e4 LT |
692 | goto err_free; |
693 | } | |
694 | gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); | |
438b6fde BF |
695 | if (gss_auth->service == 0) |
696 | goto err_put_mech; | |
1da177e4 LT |
697 | auth = &gss_auth->rpc_auth; |
698 | auth->au_cslack = GSS_CRED_SLACK >> 2; | |
699 | auth->au_rslack = GSS_VERF_SLACK >> 2; | |
700 | auth->au_ops = &authgss_ops; | |
701 | auth->au_flavor = flavor; | |
702 | atomic_set(&auth->au_count, 1); | |
0285ed1f | 703 | kref_init(&gss_auth->kref); |
1da177e4 | 704 | |
158998b6 TM |
705 | gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name, |
706 | clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); | |
6a19275a BF |
707 | if (IS_ERR(gss_auth->dentry)) { |
708 | err = PTR_ERR(gss_auth->dentry); | |
1da177e4 | 709 | goto err_put_mech; |
6a19275a | 710 | } |
1da177e4 | 711 | |
f5c2187c | 712 | err = rpcauth_init_credcache(auth); |
07a2bf1d TM |
713 | if (err) |
714 | goto err_unlink_pipe; | |
715 | ||
1da177e4 | 716 | return auth; |
07a2bf1d TM |
717 | err_unlink_pipe: |
718 | rpc_unlink(gss_auth->dentry); | |
1da177e4 LT |
719 | err_put_mech: |
720 | gss_mech_put(gss_auth->mech); | |
721 | err_free: | |
722 | kfree(gss_auth); | |
723 | out_dec: | |
724 | module_put(THIS_MODULE); | |
6a19275a | 725 | return ERR_PTR(err); |
1da177e4 LT |
726 | } |
727 | ||
0285ed1f TM |
728 | static void |
729 | gss_free(struct gss_auth *gss_auth) | |
730 | { | |
731 | rpc_unlink(gss_auth->dentry); | |
0285ed1f TM |
732 | gss_mech_put(gss_auth->mech); |
733 | ||
734 | kfree(gss_auth); | |
735 | module_put(THIS_MODULE); | |
736 | } | |
737 | ||
738 | static void | |
739 | gss_free_callback(struct kref *kref) | |
740 | { | |
741 | struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); | |
742 | ||
743 | gss_free(gss_auth); | |
744 | } | |
745 | ||
1da177e4 LT |
746 | static void |
747 | gss_destroy(struct rpc_auth *auth) | |
748 | { | |
749 | struct gss_auth *gss_auth; | |
750 | ||
8885cb36 CL |
751 | dprintk("RPC: destroying GSS authenticator %p flavor %d\n", |
752 | auth, auth->au_flavor); | |
1da177e4 | 753 | |
3ab9bb72 TM |
754 | rpcauth_destroy_credcache(auth); |
755 | ||
1da177e4 | 756 | gss_auth = container_of(auth, struct gss_auth, rpc_auth); |
0285ed1f | 757 | kref_put(&gss_auth->kref, gss_free_callback); |
1da177e4 LT |
758 | } |
759 | ||
0df7fb74 TM |
760 | /* |
761 | * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call | |
762 | * to the server with the GSS control procedure field set to | |
763 | * RPC_GSS_PROC_DESTROY. This should normally cause the server to release | |
764 | * all RPCSEC_GSS state associated with that context. | |
765 | */ | |
766 | static int | |
767 | gss_destroying_context(struct rpc_cred *cred) | |
768 | { | |
769 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
770 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); | |
771 | struct rpc_task *task; | |
772 | ||
773 | if (gss_cred->gc_ctx == NULL || | |
6dcd3926 | 774 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) |
0df7fb74 TM |
775 | return 0; |
776 | ||
777 | gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; | |
778 | cred->cr_ops = &gss_nullops; | |
779 | ||
780 | /* Take a reference to ensure the cred will be destroyed either | |
781 | * by the RPC call or by the put_rpccred() below */ | |
782 | get_rpccred(cred); | |
783 | ||
080a1f14 | 784 | task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); |
0df7fb74 TM |
785 | if (!IS_ERR(task)) |
786 | rpc_put_task(task); | |
787 | ||
788 | put_rpccred(cred); | |
789 | return 1; | |
790 | } | |
791 | ||
792 | /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure | |
1da177e4 LT |
793 | * to create a new cred or context, so they check that things have been |
794 | * allocated before freeing them. */ | |
795 | static void | |
5d28dc82 | 796 | gss_do_free_ctx(struct gss_cl_ctx *ctx) |
1da177e4 | 797 | { |
5d28dc82 | 798 | dprintk("RPC: gss_free_ctx\n"); |
1da177e4 | 799 | |
1da177e4 LT |
800 | kfree(ctx->gc_wire_ctx.data); |
801 | kfree(ctx); | |
802 | } | |
803 | ||
5d28dc82 TM |
804 | static void |
805 | gss_free_ctx_callback(struct rcu_head *head) | |
806 | { | |
807 | struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); | |
808 | gss_do_free_ctx(ctx); | |
809 | } | |
810 | ||
811 | static void | |
812 | gss_free_ctx(struct gss_cl_ctx *ctx) | |
813 | { | |
a4deb81b TM |
814 | struct gss_ctx *gc_gss_ctx; |
815 | ||
816 | gc_gss_ctx = rcu_dereference(ctx->gc_gss_ctx); | |
817 | rcu_assign_pointer(ctx->gc_gss_ctx, NULL); | |
5d28dc82 | 818 | call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); |
a4deb81b TM |
819 | if (gc_gss_ctx) |
820 | gss_delete_sec_context(&gc_gss_ctx); | |
5d28dc82 TM |
821 | } |
822 | ||
1da177e4 | 823 | static void |
31be5bf1 | 824 | gss_free_cred(struct gss_cred *gss_cred) |
1da177e4 | 825 | { |
31be5bf1 | 826 | dprintk("RPC: gss_free_cred %p\n", gss_cred); |
31be5bf1 TM |
827 | kfree(gss_cred); |
828 | } | |
1da177e4 | 829 | |
31be5bf1 TM |
830 | static void |
831 | gss_free_cred_callback(struct rcu_head *head) | |
832 | { | |
833 | struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); | |
834 | gss_free_cred(gss_cred); | |
835 | } | |
1da177e4 | 836 | |
31be5bf1 | 837 | static void |
6dcd3926 | 838 | gss_destroy_nullcred(struct rpc_cred *cred) |
31be5bf1 | 839 | { |
5d28dc82 | 840 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
0285ed1f | 841 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); |
5d28dc82 TM |
842 | struct gss_cl_ctx *ctx = gss_cred->gc_ctx; |
843 | ||
844 | rcu_assign_pointer(gss_cred->gc_ctx, NULL); | |
31be5bf1 | 845 | call_rcu(&cred->cr_rcu, gss_free_cred_callback); |
5d28dc82 TM |
846 | if (ctx) |
847 | gss_put_ctx(ctx); | |
0285ed1f | 848 | kref_put(&gss_auth->kref, gss_free_callback); |
1da177e4 LT |
849 | } |
850 | ||
6dcd3926 JL |
851 | static void |
852 | gss_destroy_cred(struct rpc_cred *cred) | |
853 | { | |
854 | ||
855 | if (gss_destroying_context(cred)) | |
856 | return; | |
857 | gss_destroy_nullcred(cred); | |
858 | } | |
859 | ||
1da177e4 LT |
860 | /* |
861 | * Lookup RPCSEC_GSS cred for the current process | |
862 | */ | |
863 | static struct rpc_cred * | |
8a317760 | 864 | gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
1da177e4 | 865 | { |
8a317760 | 866 | return rpcauth_lookup_credcache(auth, acred, flags); |
1da177e4 LT |
867 | } |
868 | ||
869 | static struct rpc_cred * | |
8a317760 | 870 | gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
1da177e4 LT |
871 | { |
872 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); | |
873 | struct gss_cred *cred = NULL; | |
874 | int err = -ENOMEM; | |
875 | ||
8885cb36 | 876 | dprintk("RPC: gss_create_cred for uid %d, flavor %d\n", |
1da177e4 LT |
877 | acred->uid, auth->au_flavor); |
878 | ||
0f38b873 | 879 | if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) |
1da177e4 LT |
880 | goto out_err; |
881 | ||
5fe4755e | 882 | rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); |
1da177e4 LT |
883 | /* |
884 | * Note: in order to force a call to call_refresh(), we deliberately | |
885 | * fail to flag the credential as RPCAUTH_CRED_UPTODATE. | |
886 | */ | |
fc432dd9 | 887 | cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; |
1da177e4 | 888 | cred->gc_service = gss_auth->service; |
7c67db3a | 889 | cred->gc_machine_cred = acred->machine_cred; |
0285ed1f | 890 | kref_get(&gss_auth->kref); |
1da177e4 LT |
891 | return &cred->gc_base; |
892 | ||
893 | out_err: | |
8885cb36 | 894 | dprintk("RPC: gss_create_cred failed with error %d\n", err); |
1da177e4 LT |
895 | return ERR_PTR(err); |
896 | } | |
897 | ||
fba3bad4 TM |
898 | static int |
899 | gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) | |
900 | { | |
901 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); | |
902 | struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); | |
903 | int err; | |
904 | ||
905 | do { | |
906 | err = gss_create_upcall(gss_auth, gss_cred); | |
907 | } while (err == -EAGAIN); | |
908 | return err; | |
909 | } | |
910 | ||
1da177e4 | 911 | static int |
8a317760 | 912 | gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) |
1da177e4 LT |
913 | { |
914 | struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); | |
915 | ||
cd019f75 | 916 | if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) |
8a317760 | 917 | goto out; |
1da177e4 | 918 | /* Don't match with creds that have expired. */ |
cd019f75 TM |
919 | if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) |
920 | return 0; | |
921 | if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) | |
1da177e4 | 922 | return 0; |
8a317760 | 923 | out: |
7c67db3a TM |
924 | if (acred->machine_cred != gss_cred->gc_machine_cred) |
925 | return 0; | |
1da177e4 LT |
926 | return (rc->cr_uid == acred->uid); |
927 | } | |
928 | ||
929 | /* | |
930 | * Marshal credentials. | |
931 | * Maybe we should keep a cached credential for performance reasons. | |
932 | */ | |
d8ed029d AD |
933 | static __be32 * |
934 | gss_marshal(struct rpc_task *task, __be32 *p) | |
1da177e4 LT |
935 | { |
936 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
937 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, | |
938 | gc_base); | |
939 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
d8ed029d | 940 | __be32 *cred_len; |
1da177e4 LT |
941 | struct rpc_rqst *req = task->tk_rqstp; |
942 | u32 maj_stat = 0; | |
943 | struct xdr_netobj mic; | |
944 | struct kvec iov; | |
945 | struct xdr_buf verf_buf; | |
946 | ||
8885cb36 | 947 | dprintk("RPC: %5u gss_marshal\n", task->tk_pid); |
1da177e4 LT |
948 | |
949 | *p++ = htonl(RPC_AUTH_GSS); | |
950 | cred_len = p++; | |
951 | ||
952 | spin_lock(&ctx->gc_seq_lock); | |
953 | req->rq_seqno = ctx->gc_seq++; | |
954 | spin_unlock(&ctx->gc_seq_lock); | |
955 | ||
956 | *p++ = htonl((u32) RPC_GSS_VERSION); | |
957 | *p++ = htonl((u32) ctx->gc_proc); | |
958 | *p++ = htonl((u32) req->rq_seqno); | |
959 | *p++ = htonl((u32) gss_cred->gc_service); | |
960 | p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); | |
961 | *cred_len = htonl((p - (cred_len + 1)) << 2); | |
962 | ||
963 | /* We compute the checksum for the verifier over the xdr-encoded bytes | |
964 | * starting with the xid and ending at the end of the credential: */ | |
808012fb CL |
965 | iov.iov_base = xprt_skip_transport_header(task->tk_xprt, |
966 | req->rq_snd_buf.head[0].iov_base); | |
1da177e4 LT |
967 | iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; |
968 | xdr_buf_from_iov(&iov, &verf_buf); | |
969 | ||
970 | /* set verifier flavor*/ | |
971 | *p++ = htonl(RPC_AUTH_GSS); | |
972 | ||
973 | mic.data = (u8 *)(p + 1); | |
00fd6e14 | 974 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
1da177e4 | 975 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) { |
fc432dd9 | 976 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 LT |
977 | } else if (maj_stat != 0) { |
978 | printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); | |
979 | goto out_put_ctx; | |
980 | } | |
981 | p = xdr_encode_opaque(p, NULL, mic.len); | |
982 | gss_put_ctx(ctx); | |
983 | return p; | |
984 | out_put_ctx: | |
985 | gss_put_ctx(ctx); | |
986 | return NULL; | |
987 | } | |
988 | ||
cd019f75 TM |
989 | static int gss_renew_cred(struct rpc_task *task) |
990 | { | |
991 | struct rpc_cred *oldcred = task->tk_msg.rpc_cred; | |
992 | struct gss_cred *gss_cred = container_of(oldcred, | |
993 | struct gss_cred, | |
994 | gc_base); | |
995 | struct rpc_auth *auth = oldcred->cr_auth; | |
996 | struct auth_cred acred = { | |
997 | .uid = oldcred->cr_uid, | |
998 | .machine_cred = gss_cred->gc_machine_cred, | |
999 | }; | |
1000 | struct rpc_cred *new; | |
1001 | ||
1002 | new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); | |
1003 | if (IS_ERR(new)) | |
1004 | return PTR_ERR(new); | |
1005 | task->tk_msg.rpc_cred = new; | |
1006 | put_rpccred(oldcred); | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1da177e4 LT |
1010 | /* |
1011 | * Refresh credentials. XXX - finish | |
1012 | */ | |
1013 | static int | |
1014 | gss_refresh(struct rpc_task *task) | |
1015 | { | |
cd019f75 TM |
1016 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
1017 | int ret = 0; | |
1018 | ||
1019 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && | |
1020 | !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { | |
1021 | ret = gss_renew_cred(task); | |
1022 | if (ret < 0) | |
1023 | goto out; | |
1024 | cred = task->tk_msg.rpc_cred; | |
1025 | } | |
1da177e4 | 1026 | |
cd019f75 TM |
1027 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
1028 | ret = gss_refresh_upcall(task); | |
1029 | out: | |
1030 | return ret; | |
1da177e4 LT |
1031 | } |
1032 | ||
0df7fb74 TM |
1033 | /* Dummy refresh routine: used only when destroying the context */ |
1034 | static int | |
1035 | gss_refresh_null(struct rpc_task *task) | |
1036 | { | |
1037 | return -EACCES; | |
1038 | } | |
1039 | ||
d8ed029d AD |
1040 | static __be32 * |
1041 | gss_validate(struct rpc_task *task, __be32 *p) | |
1da177e4 LT |
1042 | { |
1043 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
1da177e4 | 1044 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); |
d8ed029d | 1045 | __be32 seq; |
1da177e4 LT |
1046 | struct kvec iov; |
1047 | struct xdr_buf verf_buf; | |
1048 | struct xdr_netobj mic; | |
1049 | u32 flav,len; | |
1050 | u32 maj_stat; | |
1051 | ||
8885cb36 | 1052 | dprintk("RPC: %5u gss_validate\n", task->tk_pid); |
1da177e4 LT |
1053 | |
1054 | flav = ntohl(*p++); | |
1055 | if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) | |
cca5172a | 1056 | goto out_bad; |
1da177e4 LT |
1057 | if (flav != RPC_AUTH_GSS) |
1058 | goto out_bad; | |
1059 | seq = htonl(task->tk_rqstp->rq_seqno); | |
1060 | iov.iov_base = &seq; | |
1061 | iov.iov_len = sizeof(seq); | |
1062 | xdr_buf_from_iov(&iov, &verf_buf); | |
1063 | mic.data = (u8 *)p; | |
1064 | mic.len = len; | |
1065 | ||
00fd6e14 | 1066 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
1da177e4 | 1067 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1068 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
0df7fb74 | 1069 | if (maj_stat) { |
014313a9 | 1070 | dprintk("RPC: %5u gss_validate: gss_verify_mic returned " |
0df7fb74 | 1071 | "error 0x%08x\n", task->tk_pid, maj_stat); |
1da177e4 | 1072 | goto out_bad; |
0df7fb74 | 1073 | } |
24b2605b BF |
1074 | /* We leave it to unwrap to calculate au_rslack. For now we just |
1075 | * calculate the length of the verifier: */ | |
1be27f36 | 1076 | cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; |
1da177e4 | 1077 | gss_put_ctx(ctx); |
8885cb36 | 1078 | dprintk("RPC: %5u gss_validate: gss_verify_mic succeeded.\n", |
1da177e4 LT |
1079 | task->tk_pid); |
1080 | return p + XDR_QUADLEN(len); | |
1081 | out_bad: | |
1082 | gss_put_ctx(ctx); | |
8885cb36 | 1083 | dprintk("RPC: %5u gss_validate failed.\n", task->tk_pid); |
1da177e4 LT |
1084 | return NULL; |
1085 | } | |
1086 | ||
1087 | static inline int | |
1088 | gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
d8ed029d | 1089 | kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) |
1da177e4 LT |
1090 | { |
1091 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; | |
1092 | struct xdr_buf integ_buf; | |
d8ed029d | 1093 | __be32 *integ_len = NULL; |
1da177e4 | 1094 | struct xdr_netobj mic; |
d8ed029d AD |
1095 | u32 offset; |
1096 | __be32 *q; | |
1da177e4 LT |
1097 | struct kvec *iov; |
1098 | u32 maj_stat = 0; | |
1099 | int status = -EIO; | |
1100 | ||
1101 | integ_len = p++; | |
1102 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; | |
1103 | *p++ = htonl(rqstp->rq_seqno); | |
1104 | ||
88a9fe8c | 1105 | status = encode(rqstp, p, obj); |
1da177e4 LT |
1106 | if (status) |
1107 | return status; | |
1108 | ||
1109 | if (xdr_buf_subsegment(snd_buf, &integ_buf, | |
1110 | offset, snd_buf->len - offset)) | |
1111 | return status; | |
1112 | *integ_len = htonl(integ_buf.len); | |
1113 | ||
1114 | /* guess whether we're in the head or the tail: */ | |
cca5172a | 1115 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) |
1da177e4 LT |
1116 | iov = snd_buf->tail; |
1117 | else | |
1118 | iov = snd_buf->head; | |
1119 | p = iov->iov_base + iov->iov_len; | |
1120 | mic.data = (u8 *)(p + 1); | |
1121 | ||
00fd6e14 | 1122 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); |
1da177e4 LT |
1123 | status = -EIO; /* XXX? */ |
1124 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) | |
fc432dd9 | 1125 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 LT |
1126 | else if (maj_stat) |
1127 | return status; | |
1128 | q = xdr_encode_opaque(p, NULL, mic.len); | |
1129 | ||
1130 | offset = (u8 *)q - (u8 *)p; | |
1131 | iov->iov_len += offset; | |
1132 | snd_buf->len += offset; | |
1133 | return 0; | |
1134 | } | |
1135 | ||
2d2da60c BF |
1136 | static void |
1137 | priv_release_snd_buf(struct rpc_rqst *rqstp) | |
1138 | { | |
1139 | int i; | |
1140 | ||
1141 | for (i=0; i < rqstp->rq_enc_pages_num; i++) | |
1142 | __free_page(rqstp->rq_enc_pages[i]); | |
1143 | kfree(rqstp->rq_enc_pages); | |
1144 | } | |
1145 | ||
1146 | static int | |
1147 | alloc_enc_pages(struct rpc_rqst *rqstp) | |
1148 | { | |
1149 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; | |
1150 | int first, last, i; | |
1151 | ||
1152 | if (snd_buf->page_len == 0) { | |
1153 | rqstp->rq_enc_pages_num = 0; | |
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | first = snd_buf->page_base >> PAGE_CACHE_SHIFT; | |
1158 | last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; | |
1159 | rqstp->rq_enc_pages_num = last - first + 1 + 1; | |
1160 | rqstp->rq_enc_pages | |
1161 | = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), | |
1162 | GFP_NOFS); | |
1163 | if (!rqstp->rq_enc_pages) | |
1164 | goto out; | |
1165 | for (i=0; i < rqstp->rq_enc_pages_num; i++) { | |
1166 | rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); | |
1167 | if (rqstp->rq_enc_pages[i] == NULL) | |
1168 | goto out_free; | |
1169 | } | |
1170 | rqstp->rq_release_snd_buf = priv_release_snd_buf; | |
1171 | return 0; | |
1172 | out_free: | |
1173 | for (i--; i >= 0; i--) { | |
1174 | __free_page(rqstp->rq_enc_pages[i]); | |
1175 | } | |
1176 | out: | |
1177 | return -EAGAIN; | |
1178 | } | |
1179 | ||
1180 | static inline int | |
1181 | gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
d8ed029d | 1182 | kxdrproc_t encode, struct rpc_rqst *rqstp, __be32 *p, void *obj) |
2d2da60c BF |
1183 | { |
1184 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; | |
1185 | u32 offset; | |
1186 | u32 maj_stat; | |
1187 | int status; | |
d8ed029d | 1188 | __be32 *opaque_len; |
2d2da60c BF |
1189 | struct page **inpages; |
1190 | int first; | |
1191 | int pad; | |
1192 | struct kvec *iov; | |
1193 | char *tmp; | |
1194 | ||
1195 | opaque_len = p++; | |
1196 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; | |
1197 | *p++ = htonl(rqstp->rq_seqno); | |
1198 | ||
88a9fe8c | 1199 | status = encode(rqstp, p, obj); |
2d2da60c BF |
1200 | if (status) |
1201 | return status; | |
1202 | ||
1203 | status = alloc_enc_pages(rqstp); | |
1204 | if (status) | |
1205 | return status; | |
1206 | first = snd_buf->page_base >> PAGE_CACHE_SHIFT; | |
1207 | inpages = snd_buf->pages + first; | |
1208 | snd_buf->pages = rqstp->rq_enc_pages; | |
1209 | snd_buf->page_base -= first << PAGE_CACHE_SHIFT; | |
1210 | /* Give the tail its own page, in case we need extra space in the | |
1211 | * head when wrapping: */ | |
1212 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) { | |
1213 | tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); | |
1214 | memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); | |
1215 | snd_buf->tail[0].iov_base = tmp; | |
1216 | } | |
00fd6e14 | 1217 | maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); |
2d2da60c BF |
1218 | /* RPC_SLACK_SPACE should prevent this ever happening: */ |
1219 | BUG_ON(snd_buf->len > snd_buf->buflen); | |
cca5172a | 1220 | status = -EIO; |
2d2da60c BF |
1221 | /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was |
1222 | * done anyway, so it's safe to put the request on the wire: */ | |
1223 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) | |
fc432dd9 | 1224 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
2d2da60c BF |
1225 | else if (maj_stat) |
1226 | return status; | |
1227 | ||
1228 | *opaque_len = htonl(snd_buf->len - offset); | |
1229 | /* guess whether we're in the head or the tail: */ | |
1230 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) | |
1231 | iov = snd_buf->tail; | |
1232 | else | |
1233 | iov = snd_buf->head; | |
1234 | p = iov->iov_base + iov->iov_len; | |
1235 | pad = 3 - ((snd_buf->len - offset - 1) & 3); | |
1236 | memset(p, 0, pad); | |
1237 | iov->iov_len += pad; | |
1238 | snd_buf->len += pad; | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
1da177e4 LT |
1243 | static int |
1244 | gss_wrap_req(struct rpc_task *task, | |
d8ed029d | 1245 | kxdrproc_t encode, void *rqstp, __be32 *p, void *obj) |
1da177e4 LT |
1246 | { |
1247 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
1248 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, | |
1249 | gc_base); | |
1250 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
1251 | int status = -EIO; | |
1252 | ||
8885cb36 | 1253 | dprintk("RPC: %5u gss_wrap_req\n", task->tk_pid); |
1da177e4 LT |
1254 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) { |
1255 | /* The spec seems a little ambiguous here, but I think that not | |
1256 | * wrapping context destruction requests makes the most sense. | |
1257 | */ | |
88a9fe8c | 1258 | status = encode(rqstp, p, obj); |
1da177e4 LT |
1259 | goto out; |
1260 | } | |
1261 | switch (gss_cred->gc_service) { | |
1262 | case RPC_GSS_SVC_NONE: | |
88a9fe8c | 1263 | status = encode(rqstp, p, obj); |
1da177e4 LT |
1264 | break; |
1265 | case RPC_GSS_SVC_INTEGRITY: | |
1266 | status = gss_wrap_req_integ(cred, ctx, encode, | |
1267 | rqstp, p, obj); | |
1268 | break; | |
cca5172a | 1269 | case RPC_GSS_SVC_PRIVACY: |
2d2da60c BF |
1270 | status = gss_wrap_req_priv(cred, ctx, encode, |
1271 | rqstp, p, obj); | |
1da177e4 LT |
1272 | break; |
1273 | } | |
1274 | out: | |
1275 | gss_put_ctx(ctx); | |
8885cb36 | 1276 | dprintk("RPC: %5u gss_wrap_req returning %d\n", task->tk_pid, status); |
1da177e4 LT |
1277 | return status; |
1278 | } | |
1279 | ||
1280 | static inline int | |
1281 | gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
d8ed029d | 1282 | struct rpc_rqst *rqstp, __be32 **p) |
1da177e4 LT |
1283 | { |
1284 | struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; | |
1285 | struct xdr_buf integ_buf; | |
1286 | struct xdr_netobj mic; | |
1287 | u32 data_offset, mic_offset; | |
1288 | u32 integ_len; | |
1289 | u32 maj_stat; | |
1290 | int status = -EIO; | |
1291 | ||
1292 | integ_len = ntohl(*(*p)++); | |
1293 | if (integ_len & 3) | |
1294 | return status; | |
1295 | data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; | |
1296 | mic_offset = integ_len + data_offset; | |
1297 | if (mic_offset > rcv_buf->len) | |
1298 | return status; | |
1299 | if (ntohl(*(*p)++) != rqstp->rq_seqno) | |
1300 | return status; | |
1301 | ||
1302 | if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, | |
1303 | mic_offset - data_offset)) | |
1304 | return status; | |
1305 | ||
1306 | if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) | |
1307 | return status; | |
1308 | ||
00fd6e14 | 1309 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); |
1da177e4 | 1310 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1311 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 LT |
1312 | if (maj_stat != GSS_S_COMPLETE) |
1313 | return status; | |
1314 | return 0; | |
1315 | } | |
1316 | ||
2d2da60c BF |
1317 | static inline int |
1318 | gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
d8ed029d | 1319 | struct rpc_rqst *rqstp, __be32 **p) |
2d2da60c BF |
1320 | { |
1321 | struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; | |
1322 | u32 offset; | |
1323 | u32 opaque_len; | |
1324 | u32 maj_stat; | |
1325 | int status = -EIO; | |
1326 | ||
1327 | opaque_len = ntohl(*(*p)++); | |
1328 | offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; | |
1329 | if (offset + opaque_len > rcv_buf->len) | |
1330 | return status; | |
1331 | /* remove padding: */ | |
1332 | rcv_buf->len = offset + opaque_len; | |
1333 | ||
00fd6e14 | 1334 | maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); |
2d2da60c | 1335 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1336 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
2d2da60c BF |
1337 | if (maj_stat != GSS_S_COMPLETE) |
1338 | return status; | |
1339 | if (ntohl(*(*p)++) != rqstp->rq_seqno) | |
1340 | return status; | |
1341 | ||
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | ||
1da177e4 LT |
1346 | static int |
1347 | gss_unwrap_resp(struct rpc_task *task, | |
d8ed029d | 1348 | kxdrproc_t decode, void *rqstp, __be32 *p, void *obj) |
1da177e4 LT |
1349 | { |
1350 | struct rpc_cred *cred = task->tk_msg.rpc_cred; | |
1351 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, | |
1352 | gc_base); | |
1353 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
d8ed029d | 1354 | __be32 *savedp = p; |
2d2da60c BF |
1355 | struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; |
1356 | int savedlen = head->iov_len; | |
1da177e4 LT |
1357 | int status = -EIO; |
1358 | ||
1359 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) | |
1360 | goto out_decode; | |
1361 | switch (gss_cred->gc_service) { | |
1362 | case RPC_GSS_SVC_NONE: | |
1363 | break; | |
1364 | case RPC_GSS_SVC_INTEGRITY: | |
1365 | status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); | |
1366 | if (status) | |
1367 | goto out; | |
1368 | break; | |
cca5172a | 1369 | case RPC_GSS_SVC_PRIVACY: |
2d2da60c BF |
1370 | status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); |
1371 | if (status) | |
1372 | goto out; | |
1da177e4 LT |
1373 | break; |
1374 | } | |
24b2605b | 1375 | /* take into account extra slack for integrity and privacy cases: */ |
1be27f36 | 1376 | cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) |
2d2da60c | 1377 | + (savedlen - head->iov_len); |
1da177e4 | 1378 | out_decode: |
88a9fe8c | 1379 | status = decode(rqstp, p, obj); |
1da177e4 LT |
1380 | out: |
1381 | gss_put_ctx(ctx); | |
8885cb36 | 1382 | dprintk("RPC: %5u gss_unwrap_resp returning %d\n", task->tk_pid, |
1da177e4 LT |
1383 | status); |
1384 | return status; | |
1385 | } | |
cca5172a | 1386 | |
f1c0a861 | 1387 | static const struct rpc_authops authgss_ops = { |
1da177e4 LT |
1388 | .owner = THIS_MODULE, |
1389 | .au_flavor = RPC_AUTH_GSS, | |
1da177e4 | 1390 | .au_name = "RPCSEC_GSS", |
1da177e4 LT |
1391 | .create = gss_create, |
1392 | .destroy = gss_destroy, | |
1393 | .lookup_cred = gss_lookup_cred, | |
1394 | .crcreate = gss_create_cred | |
1395 | }; | |
1396 | ||
f1c0a861 | 1397 | static const struct rpc_credops gss_credops = { |
1da177e4 LT |
1398 | .cr_name = "AUTH_GSS", |
1399 | .crdestroy = gss_destroy_cred, | |
fba3bad4 | 1400 | .cr_init = gss_cred_init, |
5c691044 | 1401 | .crbind = rpcauth_generic_bind_cred, |
1da177e4 LT |
1402 | .crmatch = gss_match, |
1403 | .crmarshal = gss_marshal, | |
1404 | .crrefresh = gss_refresh, | |
1405 | .crvalidate = gss_validate, | |
1406 | .crwrap_req = gss_wrap_req, | |
1407 | .crunwrap_resp = gss_unwrap_resp, | |
1408 | }; | |
1409 | ||
0df7fb74 TM |
1410 | static const struct rpc_credops gss_nullops = { |
1411 | .cr_name = "AUTH_GSS", | |
6dcd3926 | 1412 | .crdestroy = gss_destroy_nullcred, |
5c691044 | 1413 | .crbind = rpcauth_generic_bind_cred, |
0df7fb74 TM |
1414 | .crmatch = gss_match, |
1415 | .crmarshal = gss_marshal, | |
1416 | .crrefresh = gss_refresh_null, | |
1417 | .crvalidate = gss_validate, | |
1418 | .crwrap_req = gss_wrap_req, | |
1419 | .crunwrap_resp = gss_unwrap_resp, | |
1420 | }; | |
1421 | ||
1da177e4 LT |
1422 | static struct rpc_pipe_ops gss_upcall_ops = { |
1423 | .upcall = gss_pipe_upcall, | |
1424 | .downcall = gss_pipe_downcall, | |
1425 | .destroy_msg = gss_pipe_destroy_msg, | |
cf81939d | 1426 | .open_pipe = gss_pipe_open, |
1da177e4 LT |
1427 | .release_pipe = gss_pipe_release, |
1428 | }; | |
1429 | ||
1430 | /* | |
1431 | * Initialize RPCSEC_GSS module | |
1432 | */ | |
1433 | static int __init init_rpcsec_gss(void) | |
1434 | { | |
1435 | int err = 0; | |
1436 | ||
1437 | err = rpcauth_register(&authgss_ops); | |
1438 | if (err) | |
1439 | goto out; | |
1440 | err = gss_svc_init(); | |
1441 | if (err) | |
1442 | goto out_unregister; | |
79a3f20b | 1443 | rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); |
1da177e4 LT |
1444 | return 0; |
1445 | out_unregister: | |
1446 | rpcauth_unregister(&authgss_ops); | |
1447 | out: | |
1448 | return err; | |
1449 | } | |
1450 | ||
1451 | static void __exit exit_rpcsec_gss(void) | |
1452 | { | |
1453 | gss_svc_shutdown(); | |
1454 | rpcauth_unregister(&authgss_ops); | |
1455 | } | |
1456 | ||
1457 | MODULE_LICENSE("GPL"); | |
1458 | module_init(init_rpcsec_gss) | |
1459 | module_exit(exit_rpcsec_gss) |