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> | |
eb6dc19d | 54 | #include <linux/hashtable.h> |
1da177e4 | 55 | |
abfdbd53 TM |
56 | #include "../netns.h" |
57 | ||
f1c0a861 | 58 | static const struct rpc_authops authgss_ops; |
1da177e4 | 59 | |
f1c0a861 | 60 | static const struct rpc_credops gss_credops; |
0df7fb74 | 61 | static const struct rpc_credops gss_nullops; |
1da177e4 | 62 | |
126e216a TM |
63 | #define GSS_RETRY_EXPIRED 5 |
64 | static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; | |
65 | ||
1da177e4 LT |
66 | #ifdef RPC_DEBUG |
67 | # define RPCDBG_FACILITY RPCDBG_AUTH | |
68 | #endif | |
69 | ||
725f2865 | 70 | #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) |
1da177e4 LT |
71 | /* length of a krb5 verifier (48), plus data added before arguments when |
72 | * using integrity (two 4-byte integers): */ | |
adeb8133 | 73 | #define GSS_VERF_SLACK 100 |
1da177e4 | 74 | |
eb6dc19d TM |
75 | static DEFINE_HASHTABLE(gss_auth_hash_table, 16); |
76 | static DEFINE_SPINLOCK(gss_auth_hash_lock); | |
77 | ||
19172284 TM |
78 | struct gss_pipe { |
79 | struct rpc_pipe_dir_object pdo; | |
80 | struct rpc_pipe *pipe; | |
81 | struct rpc_clnt *clnt; | |
82 | const char *name; | |
414a6295 | 83 | struct kref kref; |
19172284 TM |
84 | }; |
85 | ||
1da177e4 | 86 | struct gss_auth { |
0285ed1f | 87 | struct kref kref; |
eb6dc19d | 88 | struct hlist_node hash; |
1da177e4 LT |
89 | struct rpc_auth rpc_auth; |
90 | struct gss_api_mech *mech; | |
91 | enum rpc_gss_svc service; | |
1da177e4 | 92 | struct rpc_clnt *client; |
e726340a | 93 | struct net *net; |
34769fc4 BF |
94 | /* |
95 | * There are two upcall pipes; dentry[1], named "gssd", is used | |
96 | * for the new text-based upcall; dentry[0] is named after the | |
97 | * mechanism (for example, "krb5") and exists for | |
98 | * backwards-compatibility with older gssd's. | |
99 | */ | |
19172284 | 100 | struct gss_pipe *gss_pipe[2]; |
bd4a3eb1 | 101 | const char *target_name; |
1da177e4 LT |
102 | }; |
103 | ||
79a3f20b | 104 | /* pipe_version >= 0 if and only if someone has a pipe open. */ |
79a3f20b BF |
105 | static DEFINE_SPINLOCK(pipe_version_lock); |
106 | static struct rpc_wait_queue pipe_version_rpc_waitqueue; | |
107 | static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); | |
cf81939d | 108 | |
5d28dc82 | 109 | static void gss_free_ctx(struct gss_cl_ctx *); |
b693ba4a TM |
110 | static const struct rpc_pipe_ops gss_upcall_ops_v0; |
111 | static const struct rpc_pipe_ops gss_upcall_ops_v1; | |
1da177e4 | 112 | |
1da177e4 LT |
113 | static inline struct gss_cl_ctx * |
114 | gss_get_ctx(struct gss_cl_ctx *ctx) | |
115 | { | |
116 | atomic_inc(&ctx->count); | |
117 | return ctx; | |
118 | } | |
119 | ||
120 | static inline void | |
121 | gss_put_ctx(struct gss_cl_ctx *ctx) | |
122 | { | |
123 | if (atomic_dec_and_test(&ctx->count)) | |
5d28dc82 | 124 | gss_free_ctx(ctx); |
1da177e4 LT |
125 | } |
126 | ||
5d28dc82 TM |
127 | /* gss_cred_set_ctx: |
128 | * called by gss_upcall_callback and gss_create_upcall in order | |
129 | * to set the gss context. The actual exchange of an old context | |
9beae467 | 130 | * and a new one is protected by the pipe->lock. |
5d28dc82 | 131 | */ |
1da177e4 LT |
132 | static void |
133 | gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) | |
134 | { | |
135 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
5d28dc82 | 136 | |
cd019f75 TM |
137 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
138 | return; | |
7b6962b0 | 139 | gss_get_ctx(ctx); |
cf778b00 | 140 | rcu_assign_pointer(gss_cred->gc_ctx, ctx); |
fc432dd9 | 141 | set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
cd019f75 | 142 | smp_mb__before_clear_bit(); |
fc432dd9 | 143 | clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); |
1da177e4 LT |
144 | } |
145 | ||
146 | static const void * | |
147 | simple_get_bytes(const void *p, const void *end, void *res, size_t len) | |
148 | { | |
149 | const void *q = (const void *)((const char *)p + len); | |
150 | if (unlikely(q > end || q < p)) | |
151 | return ERR_PTR(-EFAULT); | |
152 | memcpy(res, p, len); | |
153 | return q; | |
154 | } | |
155 | ||
156 | static inline const void * | |
157 | simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) | |
158 | { | |
159 | const void *q; | |
160 | unsigned int len; | |
161 | ||
162 | p = simple_get_bytes(p, end, &len, sizeof(len)); | |
163 | if (IS_ERR(p)) | |
164 | return p; | |
165 | q = (const void *)((const char *)p + len); | |
166 | if (unlikely(q > end || q < p)) | |
167 | return ERR_PTR(-EFAULT); | |
0f38b873 | 168 | dest->data = kmemdup(p, len, GFP_NOFS); |
1da177e4 LT |
169 | if (unlikely(dest->data == NULL)) |
170 | return ERR_PTR(-ENOMEM); | |
171 | dest->len = len; | |
1da177e4 LT |
172 | return q; |
173 | } | |
174 | ||
175 | static struct gss_cl_ctx * | |
176 | gss_cred_get_ctx(struct rpc_cred *cred) | |
177 | { | |
178 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
179 | struct gss_cl_ctx *ctx = NULL; | |
180 | ||
5d28dc82 | 181 | rcu_read_lock(); |
1da177e4 LT |
182 | if (gss_cred->gc_ctx) |
183 | ctx = gss_get_ctx(gss_cred->gc_ctx); | |
5d28dc82 | 184 | rcu_read_unlock(); |
1da177e4 LT |
185 | return ctx; |
186 | } | |
187 | ||
188 | static struct gss_cl_ctx * | |
189 | gss_alloc_context(void) | |
190 | { | |
191 | struct gss_cl_ctx *ctx; | |
192 | ||
0f38b873 | 193 | ctx = kzalloc(sizeof(*ctx), GFP_NOFS); |
1da177e4 | 194 | if (ctx != NULL) { |
1da177e4 LT |
195 | ctx->gc_proc = RPC_GSS_PROC_DATA; |
196 | ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ | |
197 | spin_lock_init(&ctx->gc_seq_lock); | |
198 | atomic_set(&ctx->count,1); | |
199 | } | |
200 | return ctx; | |
201 | } | |
202 | ||
203 | #define GSSD_MIN_TIMEOUT (60 * 60) | |
204 | static const void * | |
205 | gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) | |
206 | { | |
207 | const void *q; | |
208 | unsigned int seclen; | |
209 | unsigned int timeout; | |
620038f6 | 210 | unsigned long now = jiffies; |
1da177e4 LT |
211 | u32 window_size; |
212 | int ret; | |
213 | ||
620038f6 AA |
214 | /* First unsigned int gives the remaining lifetime in seconds of the |
215 | * credential - e.g. the remaining TGT lifetime for Kerberos or | |
216 | * the -t value passed to GSSD. | |
217 | */ | |
1da177e4 LT |
218 | p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); |
219 | if (IS_ERR(p)) | |
220 | goto err; | |
221 | if (timeout == 0) | |
222 | timeout = GSSD_MIN_TIMEOUT; | |
620038f6 AA |
223 | ctx->gc_expiry = now + ((unsigned long)timeout * HZ); |
224 | /* Sequence number window. Determines the maximum number of | |
225 | * simultaneous requests | |
226 | */ | |
1da177e4 LT |
227 | p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); |
228 | if (IS_ERR(p)) | |
229 | goto err; | |
230 | ctx->gc_win = window_size; | |
231 | /* gssd signals an error by passing ctx->gc_win = 0: */ | |
232 | if (ctx->gc_win == 0) { | |
dc5ddce9 JL |
233 | /* |
234 | * in which case, p points to an error code. Anything other | |
235 | * than -EKEYEXPIRED gets converted to -EACCES. | |
236 | */ | |
237 | p = simple_get_bytes(p, end, &ret, sizeof(ret)); | |
238 | if (!IS_ERR(p)) | |
239 | p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : | |
240 | ERR_PTR(-EACCES); | |
1da177e4 LT |
241 | goto err; |
242 | } | |
243 | /* copy the opaque wire context */ | |
244 | p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); | |
245 | if (IS_ERR(p)) | |
246 | goto err; | |
247 | /* import the opaque security context */ | |
248 | p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); | |
249 | if (IS_ERR(p)) | |
250 | goto err; | |
251 | q = (const void *)((const char *)p + seclen); | |
252 | if (unlikely(q > end || q < p)) { | |
253 | p = ERR_PTR(-EFAULT); | |
254 | goto err; | |
255 | } | |
400f26b5 | 256 | ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); |
1da177e4 LT |
257 | if (ret < 0) { |
258 | p = ERR_PTR(ret); | |
259 | goto err; | |
260 | } | |
620038f6 AA |
261 | dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", |
262 | __func__, ctx->gc_expiry, now, timeout); | |
1da177e4 LT |
263 | return q; |
264 | err: | |
173db309 | 265 | dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); |
1da177e4 LT |
266 | return p; |
267 | } | |
268 | ||
34769fc4 | 269 | #define UPCALL_BUF_LEN 128 |
1da177e4 LT |
270 | |
271 | struct gss_upcall_msg { | |
272 | atomic_t count; | |
7eaf040b | 273 | kuid_t uid; |
1da177e4 LT |
274 | struct rpc_pipe_msg msg; |
275 | struct list_head list; | |
276 | struct gss_auth *auth; | |
9beae467 | 277 | struct rpc_pipe *pipe; |
1da177e4 LT |
278 | struct rpc_wait_queue rpc_waitqueue; |
279 | wait_queue_head_t waitqueue; | |
280 | struct gss_cl_ctx *ctx; | |
34769fc4 | 281 | char databuf[UPCALL_BUF_LEN]; |
1da177e4 LT |
282 | }; |
283 | ||
2aed8b47 | 284 | static int get_pipe_version(struct net *net) |
79a3f20b | 285 | { |
2aed8b47 | 286 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
79a3f20b BF |
287 | int ret; |
288 | ||
289 | spin_lock(&pipe_version_lock); | |
2aed8b47 TM |
290 | if (sn->pipe_version >= 0) { |
291 | atomic_inc(&sn->pipe_users); | |
292 | ret = sn->pipe_version; | |
79a3f20b BF |
293 | } else |
294 | ret = -EAGAIN; | |
295 | spin_unlock(&pipe_version_lock); | |
296 | return ret; | |
297 | } | |
298 | ||
2aed8b47 | 299 | static void put_pipe_version(struct net *net) |
79a3f20b | 300 | { |
2aed8b47 TM |
301 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
302 | ||
303 | if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { | |
304 | sn->pipe_version = -1; | |
79a3f20b BF |
305 | spin_unlock(&pipe_version_lock); |
306 | } | |
307 | } | |
308 | ||
1da177e4 LT |
309 | static void |
310 | gss_release_msg(struct gss_upcall_msg *gss_msg) | |
311 | { | |
e726340a | 312 | struct net *net = gss_msg->auth->net; |
1da177e4 LT |
313 | if (!atomic_dec_and_test(&gss_msg->count)) |
314 | return; | |
2aed8b47 | 315 | put_pipe_version(net); |
1da177e4 LT |
316 | BUG_ON(!list_empty(&gss_msg->list)); |
317 | if (gss_msg->ctx != NULL) | |
318 | gss_put_ctx(gss_msg->ctx); | |
f6a1cc89 | 319 | rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); |
1da177e4 LT |
320 | kfree(gss_msg); |
321 | } | |
322 | ||
323 | static struct gss_upcall_msg * | |
7eaf040b | 324 | __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) |
1da177e4 LT |
325 | { |
326 | struct gss_upcall_msg *pos; | |
9beae467 | 327 | list_for_each_entry(pos, &pipe->in_downcall, list) { |
0b4d51b0 | 328 | if (!uid_eq(pos->uid, uid)) |
1da177e4 LT |
329 | continue; |
330 | atomic_inc(&pos->count); | |
632f0d05 | 331 | dprintk("RPC: %s found msg %p\n", __func__, pos); |
1da177e4 LT |
332 | return pos; |
333 | } | |
632f0d05 | 334 | dprintk("RPC: %s found nothing\n", __func__); |
1da177e4 LT |
335 | return NULL; |
336 | } | |
337 | ||
720b8f2d | 338 | /* Try to add an upcall to the pipefs queue. |
1da177e4 LT |
339 | * If an upcall owned by our uid already exists, then we return a reference |
340 | * to that upcall instead of adding the new upcall. | |
341 | */ | |
342 | static inline struct gss_upcall_msg * | |
053e324f | 343 | gss_add_msg(struct gss_upcall_msg *gss_msg) |
1da177e4 | 344 | { |
9beae467 | 345 | struct rpc_pipe *pipe = gss_msg->pipe; |
1da177e4 LT |
346 | struct gss_upcall_msg *old; |
347 | ||
9beae467 SK |
348 | spin_lock(&pipe->lock); |
349 | old = __gss_find_upcall(pipe, gss_msg->uid); | |
1da177e4 LT |
350 | if (old == NULL) { |
351 | atomic_inc(&gss_msg->count); | |
9beae467 | 352 | list_add(&gss_msg->list, &pipe->in_downcall); |
1da177e4 LT |
353 | } else |
354 | gss_msg = old; | |
9beae467 | 355 | spin_unlock(&pipe->lock); |
1da177e4 LT |
356 | return gss_msg; |
357 | } | |
358 | ||
359 | static void | |
360 | __gss_unhash_msg(struct gss_upcall_msg *gss_msg) | |
361 | { | |
1da177e4 LT |
362 | list_del_init(&gss_msg->list); |
363 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); | |
364 | wake_up_all(&gss_msg->waitqueue); | |
365 | atomic_dec(&gss_msg->count); | |
366 | } | |
367 | ||
368 | static void | |
369 | gss_unhash_msg(struct gss_upcall_msg *gss_msg) | |
370 | { | |
9beae467 | 371 | struct rpc_pipe *pipe = gss_msg->pipe; |
1da177e4 | 372 | |
3b68aaea TM |
373 | if (list_empty(&gss_msg->list)) |
374 | return; | |
9beae467 | 375 | spin_lock(&pipe->lock); |
3b68aaea TM |
376 | if (!list_empty(&gss_msg->list)) |
377 | __gss_unhash_msg(gss_msg); | |
9beae467 | 378 | spin_unlock(&pipe->lock); |
1da177e4 LT |
379 | } |
380 | ||
126e216a TM |
381 | static void |
382 | gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) | |
383 | { | |
384 | switch (gss_msg->msg.errno) { | |
385 | case 0: | |
386 | if (gss_msg->ctx == NULL) | |
387 | break; | |
388 | clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); | |
389 | gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); | |
390 | break; | |
391 | case -EKEYEXPIRED: | |
392 | set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); | |
393 | } | |
394 | gss_cred->gc_upcall_timestamp = jiffies; | |
395 | gss_cred->gc_upcall = NULL; | |
396 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); | |
397 | } | |
398 | ||
1da177e4 LT |
399 | static void |
400 | gss_upcall_callback(struct rpc_task *task) | |
401 | { | |
a17c2153 | 402 | struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, |
1da177e4 LT |
403 | struct gss_cred, gc_base); |
404 | struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; | |
9beae467 | 405 | struct rpc_pipe *pipe = gss_msg->pipe; |
1da177e4 | 406 | |
9beae467 | 407 | spin_lock(&pipe->lock); |
126e216a | 408 | gss_handle_downcall_result(gss_cred, gss_msg); |
9beae467 | 409 | spin_unlock(&pipe->lock); |
126e216a | 410 | task->tk_status = gss_msg->msg.errno; |
1da177e4 LT |
411 | gss_release_msg(gss_msg); |
412 | } | |
413 | ||
34769fc4 BF |
414 | static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) |
415 | { | |
90602c7b EB |
416 | uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); |
417 | memcpy(gss_msg->databuf, &uid, sizeof(uid)); | |
418 | gss_msg->msg.data = gss_msg->databuf; | |
419 | gss_msg->msg.len = sizeof(uid); | |
420 | BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); | |
34769fc4 BF |
421 | } |
422 | ||
8b1c7bf5 | 423 | static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, |
bd4a3eb1 TM |
424 | const char *service_name, |
425 | const char *target_name) | |
34769fc4 | 426 | { |
683ac665 | 427 | struct gss_api_mech *mech = gss_msg->auth->mech; |
8b1c7bf5 OK |
428 | char *p = gss_msg->databuf; |
429 | int len = 0; | |
430 | ||
431 | gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", | |
683ac665 | 432 | mech->gm_name, |
90602c7b | 433 | from_kuid(&init_user_ns, gss_msg->uid)); |
8b1c7bf5 | 434 | p += gss_msg->msg.len; |
bd4a3eb1 TM |
435 | if (target_name) { |
436 | len = sprintf(p, "target=%s ", target_name); | |
8b1c7bf5 OK |
437 | p += len; |
438 | gss_msg->msg.len += len; | |
439 | } | |
68c97153 TM |
440 | if (service_name != NULL) { |
441 | len = sprintf(p, "service=%s ", service_name); | |
2efef708 OK |
442 | p += len; |
443 | gss_msg->msg.len += len; | |
444 | } | |
683ac665 | 445 | if (mech->gm_upcall_enctypes) { |
f8628220 | 446 | len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); |
683ac665 TM |
447 | p += len; |
448 | gss_msg->msg.len += len; | |
449 | } | |
8b1c7bf5 OK |
450 | len = sprintf(p, "\n"); |
451 | gss_msg->msg.len += len; | |
452 | ||
34769fc4 BF |
453 | gss_msg->msg.data = gss_msg->databuf; |
454 | BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); | |
455 | } | |
456 | ||
68c97153 | 457 | static struct gss_upcall_msg * |
e726340a | 458 | gss_alloc_msg(struct gss_auth *gss_auth, |
7eaf040b | 459 | kuid_t uid, const char *service_name) |
1da177e4 LT |
460 | { |
461 | struct gss_upcall_msg *gss_msg; | |
79a3f20b | 462 | int vers; |
1da177e4 | 463 | |
0f38b873 | 464 | gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); |
db75b3d6 BF |
465 | if (gss_msg == NULL) |
466 | return ERR_PTR(-ENOMEM); | |
e726340a | 467 | vers = get_pipe_version(gss_auth->net); |
79a3f20b BF |
468 | if (vers < 0) { |
469 | kfree(gss_msg); | |
470 | return ERR_PTR(vers); | |
471 | } | |
19172284 | 472 | gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; |
db75b3d6 BF |
473 | INIT_LIST_HEAD(&gss_msg->list); |
474 | rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); | |
475 | init_waitqueue_head(&gss_msg->waitqueue); | |
476 | atomic_set(&gss_msg->count, 1); | |
db75b3d6 BF |
477 | gss_msg->uid = uid; |
478 | gss_msg->auth = gss_auth; | |
bd4a3eb1 TM |
479 | switch (vers) { |
480 | case 0: | |
481 | gss_encode_v0_msg(gss_msg); | |
482 | default: | |
483 | gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); | |
484 | }; | |
1da177e4 LT |
485 | return gss_msg; |
486 | } | |
487 | ||
488 | static struct gss_upcall_msg * | |
e726340a | 489 | gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) |
1da177e4 | 490 | { |
7c67db3a TM |
491 | struct gss_cred *gss_cred = container_of(cred, |
492 | struct gss_cred, gc_base); | |
1da177e4 | 493 | struct gss_upcall_msg *gss_new, *gss_msg; |
7eaf040b | 494 | kuid_t uid = cred->cr_uid; |
1da177e4 | 495 | |
e726340a | 496 | gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); |
db75b3d6 BF |
497 | if (IS_ERR(gss_new)) |
498 | return gss_new; | |
053e324f | 499 | gss_msg = gss_add_msg(gss_new); |
1da177e4 | 500 | if (gss_msg == gss_new) { |
9beae467 | 501 | int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); |
1da177e4 LT |
502 | if (res) { |
503 | gss_unhash_msg(gss_new); | |
504 | gss_msg = ERR_PTR(res); | |
505 | } | |
506 | } else | |
507 | gss_release_msg(gss_new); | |
508 | return gss_msg; | |
509 | } | |
510 | ||
b03568c3 BF |
511 | static void warn_gssd(void) |
512 | { | |
513 | static unsigned long ratelimit; | |
514 | unsigned long now = jiffies; | |
515 | ||
516 | if (time_after(now, ratelimit)) { | |
517 | printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" | |
518 | "Please check user daemon is running.\n"); | |
519 | ratelimit = now + 15*HZ; | |
520 | } | |
521 | } | |
522 | ||
1da177e4 LT |
523 | static inline int |
524 | gss_refresh_upcall(struct rpc_task *task) | |
525 | { | |
a17c2153 | 526 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
4a8c1344 | 527 | struct gss_auth *gss_auth = container_of(cred->cr_auth, |
1da177e4 LT |
528 | struct gss_auth, rpc_auth); |
529 | struct gss_cred *gss_cred = container_of(cred, | |
530 | struct gss_cred, gc_base); | |
531 | struct gss_upcall_msg *gss_msg; | |
9beae467 | 532 | struct rpc_pipe *pipe; |
1da177e4 LT |
533 | int err = 0; |
534 | ||
632f0d05 | 535 | dprintk("RPC: %5u %s for uid %u\n", |
cdba321e | 536 | task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); |
e726340a | 537 | gss_msg = gss_setup_upcall(gss_auth, cred); |
480e3243 | 538 | if (PTR_ERR(gss_msg) == -EAGAIN) { |
79a3f20b BF |
539 | /* XXX: warning on the first, under the assumption we |
540 | * shouldn't normally hit this case on a refresh. */ | |
541 | warn_gssd(); | |
542 | task->tk_timeout = 15*HZ; | |
543 | rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); | |
d1a8016a | 544 | return -EAGAIN; |
79a3f20b | 545 | } |
1da177e4 LT |
546 | if (IS_ERR(gss_msg)) { |
547 | err = PTR_ERR(gss_msg); | |
548 | goto out; | |
549 | } | |
9beae467 SK |
550 | pipe = gss_msg->pipe; |
551 | spin_lock(&pipe->lock); | |
1da177e4 | 552 | if (gss_cred->gc_upcall != NULL) |
5d00837b | 553 | rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); |
126e216a | 554 | else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { |
1da177e4 LT |
555 | task->tk_timeout = 0; |
556 | gss_cred->gc_upcall = gss_msg; | |
557 | /* gss_upcall_callback will release the reference to gss_upcall_msg */ | |
558 | atomic_inc(&gss_msg->count); | |
5d00837b | 559 | rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); |
126e216a TM |
560 | } else { |
561 | gss_handle_downcall_result(gss_cred, gss_msg); | |
1da177e4 | 562 | err = gss_msg->msg.errno; |
126e216a | 563 | } |
9beae467 | 564 | spin_unlock(&pipe->lock); |
1da177e4 LT |
565 | gss_release_msg(gss_msg); |
566 | out: | |
632f0d05 | 567 | dprintk("RPC: %5u %s for uid %u result %d\n", |
cdba321e EB |
568 | task->tk_pid, __func__, |
569 | from_kuid(&init_user_ns, cred->cr_uid), err); | |
1da177e4 LT |
570 | return err; |
571 | } | |
572 | ||
573 | static inline int | |
574 | gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) | |
575 | { | |
e726340a | 576 | struct net *net = gss_auth->net; |
abfdbd53 | 577 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
9beae467 | 578 | struct rpc_pipe *pipe; |
1da177e4 LT |
579 | struct rpc_cred *cred = &gss_cred->gc_base; |
580 | struct gss_upcall_msg *gss_msg; | |
abfdbd53 | 581 | unsigned long timeout; |
1da177e4 | 582 | DEFINE_WAIT(wait); |
d36ccb9c | 583 | int err; |
1da177e4 | 584 | |
cdba321e EB |
585 | dprintk("RPC: %s for uid %u\n", |
586 | __func__, from_kuid(&init_user_ns, cred->cr_uid)); | |
79a3f20b | 587 | retry: |
d36ccb9c | 588 | err = 0; |
abfdbd53 TM |
589 | /* Default timeout is 15s unless we know that gssd is not running */ |
590 | timeout = 15 * HZ; | |
591 | if (!sn->gssd_running) | |
592 | timeout = HZ >> 2; | |
e726340a | 593 | gss_msg = gss_setup_upcall(gss_auth, cred); |
79a3f20b BF |
594 | if (PTR_ERR(gss_msg) == -EAGAIN) { |
595 | err = wait_event_interruptible_timeout(pipe_version_waitqueue, | |
2aed8b47 TM |
596 | sn->pipe_version >= 0, timeout); |
597 | if (sn->pipe_version < 0) { | |
abfdbd53 TM |
598 | if (err == 0) |
599 | sn->gssd_running = 0; | |
d1a8016a BS |
600 | warn_gssd(); |
601 | err = -EACCES; | |
602 | } | |
d36ccb9c | 603 | if (err < 0) |
79a3f20b | 604 | goto out; |
79a3f20b BF |
605 | goto retry; |
606 | } | |
1da177e4 LT |
607 | if (IS_ERR(gss_msg)) { |
608 | err = PTR_ERR(gss_msg); | |
609 | goto out; | |
610 | } | |
9beae467 | 611 | pipe = gss_msg->pipe; |
1da177e4 | 612 | for (;;) { |
5afa9133 | 613 | prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); |
9beae467 | 614 | spin_lock(&pipe->lock); |
1da177e4 | 615 | if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { |
1da177e4 LT |
616 | break; |
617 | } | |
9beae467 | 618 | spin_unlock(&pipe->lock); |
5afa9133 | 619 | if (fatal_signal_pending(current)) { |
1da177e4 LT |
620 | err = -ERESTARTSYS; |
621 | goto out_intr; | |
622 | } | |
623 | schedule(); | |
624 | } | |
625 | if (gss_msg->ctx) | |
7b6962b0 | 626 | gss_cred_set_ctx(cred, gss_msg->ctx); |
1da177e4 LT |
627 | else |
628 | err = gss_msg->msg.errno; | |
9beae467 | 629 | spin_unlock(&pipe->lock); |
1da177e4 LT |
630 | out_intr: |
631 | finish_wait(&gss_msg->waitqueue, &wait); | |
632 | gss_release_msg(gss_msg); | |
633 | out: | |
632f0d05 | 634 | dprintk("RPC: %s for uid %u result %d\n", |
cdba321e | 635 | __func__, from_kuid(&init_user_ns, cred->cr_uid), err); |
1da177e4 LT |
636 | return err; |
637 | } | |
638 | ||
1da177e4 LT |
639 | #define MSG_BUF_MAXSIZE 1024 |
640 | ||
641 | static ssize_t | |
642 | gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) | |
643 | { | |
644 | const void *p, *end; | |
645 | void *buf; | |
1da177e4 | 646 | struct gss_upcall_msg *gss_msg; |
496ad9aa | 647 | struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; |
1da177e4 | 648 | struct gss_cl_ctx *ctx; |
90602c7b EB |
649 | uid_t id; |
650 | kuid_t uid; | |
3b68aaea | 651 | ssize_t err = -EFBIG; |
1da177e4 LT |
652 | |
653 | if (mlen > MSG_BUF_MAXSIZE) | |
654 | goto out; | |
655 | err = -ENOMEM; | |
0f38b873 | 656 | buf = kmalloc(mlen, GFP_NOFS); |
1da177e4 LT |
657 | if (!buf) |
658 | goto out; | |
659 | ||
1da177e4 LT |
660 | err = -EFAULT; |
661 | if (copy_from_user(buf, src, mlen)) | |
662 | goto err; | |
663 | ||
664 | end = (const void *)((char *)buf + mlen); | |
90602c7b | 665 | p = simple_get_bytes(buf, end, &id, sizeof(id)); |
1da177e4 LT |
666 | if (IS_ERR(p)) { |
667 | err = PTR_ERR(p); | |
668 | goto err; | |
669 | } | |
670 | ||
90602c7b EB |
671 | uid = make_kuid(&init_user_ns, id); |
672 | if (!uid_valid(uid)) { | |
673 | err = -EINVAL; | |
674 | goto err; | |
675 | } | |
676 | ||
1da177e4 LT |
677 | err = -ENOMEM; |
678 | ctx = gss_alloc_context(); | |
679 | if (ctx == NULL) | |
680 | goto err; | |
3b68aaea TM |
681 | |
682 | err = -ENOENT; | |
683 | /* Find a matching upcall */ | |
9beae467 SK |
684 | spin_lock(&pipe->lock); |
685 | gss_msg = __gss_find_upcall(pipe, uid); | |
3b68aaea | 686 | if (gss_msg == NULL) { |
9beae467 | 687 | spin_unlock(&pipe->lock); |
3b68aaea TM |
688 | goto err_put_ctx; |
689 | } | |
690 | list_del_init(&gss_msg->list); | |
9beae467 | 691 | spin_unlock(&pipe->lock); |
3b68aaea | 692 | |
6e84c7b6 | 693 | p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); |
1da177e4 LT |
694 | if (IS_ERR(p)) { |
695 | err = PTR_ERR(p); | |
486bad2e JL |
696 | switch (err) { |
697 | case -EACCES: | |
dc5ddce9 | 698 | case -EKEYEXPIRED: |
486bad2e JL |
699 | gss_msg->msg.errno = err; |
700 | err = mlen; | |
701 | break; | |
702 | case -EFAULT: | |
703 | case -ENOMEM: | |
704 | case -EINVAL: | |
705 | case -ENOSYS: | |
706 | gss_msg->msg.errno = -EAGAIN; | |
707 | break; | |
708 | default: | |
709 | printk(KERN_CRIT "%s: bad return from " | |
6c853099 | 710 | "gss_fill_context: %zd\n", __func__, err); |
486bad2e JL |
711 | BUG(); |
712 | } | |
3b68aaea | 713 | goto err_release_msg; |
1da177e4 | 714 | } |
3b68aaea TM |
715 | gss_msg->ctx = gss_get_ctx(ctx); |
716 | err = mlen; | |
717 | ||
718 | err_release_msg: | |
9beae467 | 719 | spin_lock(&pipe->lock); |
3b68aaea | 720 | __gss_unhash_msg(gss_msg); |
9beae467 | 721 | spin_unlock(&pipe->lock); |
3b68aaea | 722 | gss_release_msg(gss_msg); |
1da177e4 LT |
723 | err_put_ctx: |
724 | gss_put_ctx(ctx); | |
725 | err: | |
726 | kfree(buf); | |
727 | out: | |
632f0d05 | 728 | dprintk("RPC: %s returning %Zd\n", __func__, err); |
1da177e4 LT |
729 | return err; |
730 | } | |
731 | ||
34769fc4 | 732 | static int gss_pipe_open(struct inode *inode, int new_version) |
cf81939d | 733 | { |
2aed8b47 TM |
734 | struct net *net = inode->i_sb->s_fs_info; |
735 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
34769fc4 BF |
736 | int ret = 0; |
737 | ||
79a3f20b | 738 | spin_lock(&pipe_version_lock); |
2aed8b47 | 739 | if (sn->pipe_version < 0) { |
34769fc4 | 740 | /* First open of any gss pipe determines the version: */ |
2aed8b47 | 741 | sn->pipe_version = new_version; |
79a3f20b BF |
742 | rpc_wake_up(&pipe_version_rpc_waitqueue); |
743 | wake_up(&pipe_version_waitqueue); | |
2aed8b47 | 744 | } else if (sn->pipe_version != new_version) { |
34769fc4 BF |
745 | /* Trying to open a pipe of a different version */ |
746 | ret = -EBUSY; | |
747 | goto out; | |
79a3f20b | 748 | } |
2aed8b47 | 749 | atomic_inc(&sn->pipe_users); |
34769fc4 | 750 | out: |
79a3f20b | 751 | spin_unlock(&pipe_version_lock); |
34769fc4 BF |
752 | return ret; |
753 | ||
754 | } | |
755 | ||
756 | static int gss_pipe_open_v0(struct inode *inode) | |
757 | { | |
758 | return gss_pipe_open(inode, 0); | |
759 | } | |
760 | ||
761 | static int gss_pipe_open_v1(struct inode *inode) | |
762 | { | |
763 | return gss_pipe_open(inode, 1); | |
cf81939d BF |
764 | } |
765 | ||
1da177e4 LT |
766 | static void |
767 | gss_pipe_release(struct inode *inode) | |
768 | { | |
2aed8b47 | 769 | struct net *net = inode->i_sb->s_fs_info; |
9beae467 | 770 | struct rpc_pipe *pipe = RPC_I(inode)->pipe; |
6e84c7b6 | 771 | struct gss_upcall_msg *gss_msg; |
1da177e4 | 772 | |
5a67657a | 773 | restart: |
9beae467 SK |
774 | spin_lock(&pipe->lock); |
775 | list_for_each_entry(gss_msg, &pipe->in_downcall, list) { | |
1da177e4 | 776 | |
5a67657a TM |
777 | if (!list_empty(&gss_msg->msg.list)) |
778 | continue; | |
1da177e4 LT |
779 | gss_msg->msg.errno = -EPIPE; |
780 | atomic_inc(&gss_msg->count); | |
781 | __gss_unhash_msg(gss_msg); | |
9beae467 | 782 | spin_unlock(&pipe->lock); |
1da177e4 | 783 | gss_release_msg(gss_msg); |
5a67657a | 784 | goto restart; |
1da177e4 | 785 | } |
9beae467 | 786 | spin_unlock(&pipe->lock); |
cf81939d | 787 | |
2aed8b47 | 788 | put_pipe_version(net); |
1da177e4 LT |
789 | } |
790 | ||
791 | static void | |
792 | gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) | |
793 | { | |
794 | struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); | |
1da177e4 LT |
795 | |
796 | if (msg->errno < 0) { | |
632f0d05 CL |
797 | dprintk("RPC: %s releasing msg %p\n", |
798 | __func__, gss_msg); | |
1da177e4 LT |
799 | atomic_inc(&gss_msg->count); |
800 | gss_unhash_msg(gss_msg); | |
b03568c3 BF |
801 | if (msg->errno == -ETIMEDOUT) |
802 | warn_gssd(); | |
1da177e4 LT |
803 | gss_release_msg(gss_msg); |
804 | } | |
805 | } | |
806 | ||
19172284 TM |
807 | static void gss_pipe_dentry_destroy(struct dentry *dir, |
808 | struct rpc_pipe_dir_object *pdo) | |
ccdc28f8 | 809 | { |
19172284 TM |
810 | struct gss_pipe *gss_pipe = pdo->pdo_data; |
811 | struct rpc_pipe *pipe = gss_pipe->pipe; | |
ccdc28f8 | 812 | |
19172284 TM |
813 | if (pipe->dentry != NULL) { |
814 | rpc_unlink(pipe->dentry); | |
815 | pipe->dentry = NULL; | |
6b2fddd3 | 816 | } |
ccdc28f8 SK |
817 | } |
818 | ||
19172284 TM |
819 | static int gss_pipe_dentry_create(struct dentry *dir, |
820 | struct rpc_pipe_dir_object *pdo) | |
ccdc28f8 | 821 | { |
19172284 | 822 | struct gss_pipe *p = pdo->pdo_data; |
6b2fddd3 | 823 | struct dentry *dentry; |
ccdc28f8 | 824 | |
19172284 TM |
825 | dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); |
826 | if (IS_ERR(dentry)) | |
827 | return PTR_ERR(dentry); | |
828 | p->pipe->dentry = dentry; | |
829 | return 0; | |
830 | } | |
831 | ||
832 | static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { | |
833 | .create = gss_pipe_dentry_create, | |
834 | .destroy = gss_pipe_dentry_destroy, | |
835 | }; | |
836 | ||
837 | static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, | |
838 | const char *name, | |
839 | const struct rpc_pipe_ops *upcall_ops) | |
840 | { | |
19172284 TM |
841 | struct gss_pipe *p; |
842 | int err = -ENOMEM; | |
ccdc28f8 | 843 | |
19172284 TM |
844 | p = kmalloc(sizeof(*p), GFP_KERNEL); |
845 | if (p == NULL) | |
6b2fddd3 | 846 | goto err; |
19172284 TM |
847 | p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); |
848 | if (IS_ERR(p->pipe)) { | |
849 | err = PTR_ERR(p->pipe); | |
850 | goto err_free_gss_pipe; | |
6b2fddd3 | 851 | } |
19172284 TM |
852 | p->name = name; |
853 | p->clnt = clnt; | |
414a6295 | 854 | kref_init(&p->kref); |
19172284 TM |
855 | rpc_init_pipe_dir_object(&p->pdo, |
856 | &gss_pipe_dir_object_ops, | |
857 | p); | |
414a6295 | 858 | return p; |
19172284 TM |
859 | err_free_gss_pipe: |
860 | kfree(p); | |
6b2fddd3 | 861 | err: |
19172284 | 862 | return ERR_PTR(err); |
ccdc28f8 SK |
863 | } |
864 | ||
414a6295 TM |
865 | struct gss_alloc_pdo { |
866 | struct rpc_clnt *clnt; | |
867 | const char *name; | |
868 | const struct rpc_pipe_ops *upcall_ops; | |
869 | }; | |
870 | ||
871 | static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) | |
872 | { | |
873 | struct gss_pipe *gss_pipe; | |
874 | struct gss_alloc_pdo *args = data; | |
875 | ||
876 | if (pdo->pdo_ops != &gss_pipe_dir_object_ops) | |
877 | return 0; | |
878 | gss_pipe = container_of(pdo, struct gss_pipe, pdo); | |
879 | if (strcmp(gss_pipe->name, args->name) != 0) | |
880 | return 0; | |
881 | if (!kref_get_unless_zero(&gss_pipe->kref)) | |
882 | return 0; | |
883 | return 1; | |
884 | } | |
885 | ||
886 | static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) | |
887 | { | |
888 | struct gss_pipe *gss_pipe; | |
889 | struct gss_alloc_pdo *args = data; | |
890 | ||
891 | gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); | |
892 | if (!IS_ERR(gss_pipe)) | |
893 | return &gss_pipe->pdo; | |
894 | return NULL; | |
895 | } | |
896 | ||
897 | static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, | |
898 | const char *name, | |
899 | const struct rpc_pipe_ops *upcall_ops) | |
900 | { | |
901 | struct net *net = rpc_net_ns(clnt); | |
902 | struct rpc_pipe_dir_object *pdo; | |
903 | struct gss_alloc_pdo args = { | |
904 | .clnt = clnt, | |
905 | .name = name, | |
906 | .upcall_ops = upcall_ops, | |
907 | }; | |
908 | ||
909 | pdo = rpc_find_or_alloc_pipe_dir_object(net, | |
910 | &clnt->cl_pipedir_objects, | |
911 | gss_pipe_match_pdo, | |
912 | gss_pipe_alloc_pdo, | |
913 | &args); | |
914 | if (pdo != NULL) | |
915 | return container_of(pdo, struct gss_pipe, pdo); | |
916 | return ERR_PTR(-ENOMEM); | |
917 | } | |
918 | ||
19172284 | 919 | static void __gss_pipe_free(struct gss_pipe *p) |
ccdc28f8 | 920 | { |
19172284 TM |
921 | struct rpc_clnt *clnt = p->clnt; |
922 | struct net *net = rpc_net_ns(clnt); | |
ccdc28f8 | 923 | |
19172284 TM |
924 | rpc_remove_pipe_dir_object(net, |
925 | &clnt->cl_pipedir_objects, | |
926 | &p->pdo); | |
927 | rpc_destroy_pipe_data(p->pipe); | |
928 | kfree(p); | |
ccdc28f8 SK |
929 | } |
930 | ||
414a6295 TM |
931 | static void __gss_pipe_release(struct kref *kref) |
932 | { | |
933 | struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); | |
934 | ||
935 | __gss_pipe_free(p); | |
936 | } | |
937 | ||
19172284 | 938 | static void gss_pipe_free(struct gss_pipe *p) |
ccdc28f8 | 939 | { |
19172284 | 940 | if (p != NULL) |
414a6295 | 941 | kref_put(&p->kref, __gss_pipe_release); |
ccdc28f8 SK |
942 | } |
943 | ||
cca5172a YH |
944 | /* |
945 | * NOTE: we have the opportunity to use different | |
1da177e4 LT |
946 | * parameters based on the input flavor (which must be a pseudoflavor) |
947 | */ | |
eb6dc19d TM |
948 | static struct gss_auth * |
949 | gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) | |
1da177e4 | 950 | { |
c2190661 | 951 | rpc_authflavor_t flavor = args->pseudoflavor; |
1da177e4 | 952 | struct gss_auth *gss_auth; |
19172284 | 953 | struct gss_pipe *gss_pipe; |
1da177e4 | 954 | struct rpc_auth * auth; |
6a19275a | 955 | int err = -ENOMEM; /* XXX? */ |
1da177e4 | 956 | |
8885cb36 | 957 | dprintk("RPC: creating GSS authenticator for client %p\n", clnt); |
1da177e4 LT |
958 | |
959 | if (!try_module_get(THIS_MODULE)) | |
6a19275a | 960 | return ERR_PTR(err); |
1da177e4 LT |
961 | if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) |
962 | goto out_dec; | |
eb6dc19d | 963 | INIT_HLIST_NODE(&gss_auth->hash); |
bd4a3eb1 | 964 | gss_auth->target_name = NULL; |
c2190661 TM |
965 | if (args->target_name) { |
966 | gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); | |
bd4a3eb1 TM |
967 | if (gss_auth->target_name == NULL) |
968 | goto err_free; | |
969 | } | |
1da177e4 | 970 | gss_auth->client = clnt; |
e726340a | 971 | gss_auth->net = get_net(rpc_net_ns(clnt)); |
6a19275a | 972 | err = -EINVAL; |
1da177e4 LT |
973 | gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); |
974 | if (!gss_auth->mech) { | |
9b1d75b7 | 975 | dprintk("RPC: Pseudoflavor %d not found!\n", flavor); |
e726340a | 976 | goto err_put_net; |
1da177e4 LT |
977 | } |
978 | gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); | |
438b6fde BF |
979 | if (gss_auth->service == 0) |
980 | goto err_put_mech; | |
1da177e4 LT |
981 | auth = &gss_auth->rpc_auth; |
982 | auth->au_cslack = GSS_CRED_SLACK >> 2; | |
983 | auth->au_rslack = GSS_VERF_SLACK >> 2; | |
984 | auth->au_ops = &authgss_ops; | |
985 | auth->au_flavor = flavor; | |
986 | atomic_set(&auth->au_count, 1); | |
0285ed1f | 987 | kref_init(&gss_auth->kref); |
1da177e4 | 988 | |
19172284 TM |
989 | err = rpcauth_init_credcache(auth); |
990 | if (err) | |
991 | goto err_put_mech; | |
34769fc4 BF |
992 | /* |
993 | * Note: if we created the old pipe first, then someone who | |
994 | * examined the directory at the right moment might conclude | |
995 | * that we supported only the old pipe. So we instead create | |
996 | * the new pipe first. | |
997 | */ | |
414a6295 | 998 | gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); |
19172284 TM |
999 | if (IS_ERR(gss_pipe)) { |
1000 | err = PTR_ERR(gss_pipe); | |
1001 | goto err_destroy_credcache; | |
6a19275a | 1002 | } |
19172284 | 1003 | gss_auth->gss_pipe[1] = gss_pipe; |
1da177e4 | 1004 | |
414a6295 | 1005 | gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, |
19172284 TM |
1006 | &gss_upcall_ops_v0); |
1007 | if (IS_ERR(gss_pipe)) { | |
1008 | err = PTR_ERR(gss_pipe); | |
c239d83b SK |
1009 | goto err_destroy_pipe_1; |
1010 | } | |
19172284 | 1011 | gss_auth->gss_pipe[0] = gss_pipe; |
07a2bf1d | 1012 | |
eb6dc19d | 1013 | return gss_auth; |
c239d83b | 1014 | err_destroy_pipe_1: |
414a6295 | 1015 | gss_pipe_free(gss_auth->gss_pipe[1]); |
19172284 TM |
1016 | err_destroy_credcache: |
1017 | rpcauth_destroy_credcache(auth); | |
1da177e4 LT |
1018 | err_put_mech: |
1019 | gss_mech_put(gss_auth->mech); | |
e726340a TM |
1020 | err_put_net: |
1021 | put_net(gss_auth->net); | |
1da177e4 | 1022 | err_free: |
bd4a3eb1 | 1023 | kfree(gss_auth->target_name); |
1da177e4 LT |
1024 | kfree(gss_auth); |
1025 | out_dec: | |
1026 | module_put(THIS_MODULE); | |
6a19275a | 1027 | return ERR_PTR(err); |
1da177e4 LT |
1028 | } |
1029 | ||
0285ed1f TM |
1030 | static void |
1031 | gss_free(struct gss_auth *gss_auth) | |
1032 | { | |
19172284 TM |
1033 | gss_pipe_free(gss_auth->gss_pipe[0]); |
1034 | gss_pipe_free(gss_auth->gss_pipe[1]); | |
0285ed1f | 1035 | gss_mech_put(gss_auth->mech); |
e726340a | 1036 | put_net(gss_auth->net); |
bd4a3eb1 | 1037 | kfree(gss_auth->target_name); |
0285ed1f TM |
1038 | |
1039 | kfree(gss_auth); | |
1040 | module_put(THIS_MODULE); | |
1041 | } | |
1042 | ||
1043 | static void | |
1044 | gss_free_callback(struct kref *kref) | |
1045 | { | |
1046 | struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); | |
1047 | ||
1048 | gss_free(gss_auth); | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | static void |
1052 | gss_destroy(struct rpc_auth *auth) | |
1053 | { | |
19172284 TM |
1054 | struct gss_auth *gss_auth = container_of(auth, |
1055 | struct gss_auth, rpc_auth); | |
1da177e4 | 1056 | |
8885cb36 CL |
1057 | dprintk("RPC: destroying GSS authenticator %p flavor %d\n", |
1058 | auth, auth->au_flavor); | |
1da177e4 | 1059 | |
eb6dc19d TM |
1060 | if (hash_hashed(&gss_auth->hash)) { |
1061 | spin_lock(&gss_auth_hash_lock); | |
1062 | hash_del(&gss_auth->hash); | |
1063 | spin_unlock(&gss_auth_hash_lock); | |
1064 | } | |
1065 | ||
19172284 TM |
1066 | gss_pipe_free(gss_auth->gss_pipe[0]); |
1067 | gss_auth->gss_pipe[0] = NULL; | |
1068 | gss_pipe_free(gss_auth->gss_pipe[1]); | |
1069 | gss_auth->gss_pipe[1] = NULL; | |
3ab9bb72 TM |
1070 | rpcauth_destroy_credcache(auth); |
1071 | ||
0285ed1f | 1072 | kref_put(&gss_auth->kref, gss_free_callback); |
1da177e4 LT |
1073 | } |
1074 | ||
eb6dc19d TM |
1075 | static struct gss_auth * |
1076 | gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args, | |
1077 | struct rpc_clnt *clnt, | |
1078 | struct gss_auth *new) | |
1079 | { | |
1080 | struct gss_auth *gss_auth; | |
1081 | unsigned long hashval = (unsigned long)clnt; | |
1082 | ||
1083 | spin_lock(&gss_auth_hash_lock); | |
1084 | hash_for_each_possible(gss_auth_hash_table, | |
1085 | gss_auth, | |
1086 | hash, | |
1087 | hashval) { | |
1088 | if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) | |
1089 | continue; | |
1090 | if (gss_auth->target_name != args->target_name) { | |
1091 | if (gss_auth->target_name == NULL) | |
1092 | continue; | |
1093 | if (args->target_name == NULL) | |
1094 | continue; | |
1095 | if (strcmp(gss_auth->target_name, args->target_name)) | |
1096 | continue; | |
1097 | } | |
1098 | if (!atomic_inc_not_zero(&gss_auth->rpc_auth.au_count)) | |
1099 | continue; | |
1100 | goto out; | |
1101 | } | |
1102 | if (new) | |
1103 | hash_add(gss_auth_hash_table, &new->hash, hashval); | |
1104 | gss_auth = new; | |
1105 | out: | |
1106 | spin_unlock(&gss_auth_hash_lock); | |
1107 | return gss_auth; | |
1108 | } | |
1109 | ||
1110 | static struct gss_auth * | |
1111 | gss_create_hashed(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) | |
1112 | { | |
1113 | struct gss_auth *gss_auth; | |
1114 | struct gss_auth *new; | |
1115 | ||
1116 | gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); | |
1117 | if (gss_auth != NULL) | |
1118 | goto out; | |
1119 | new = gss_create_new(args, clnt); | |
1120 | if (IS_ERR(new)) | |
1121 | return new; | |
1122 | gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); | |
1123 | if (gss_auth != new) | |
1124 | gss_destroy(&new->rpc_auth); | |
1125 | out: | |
1126 | return gss_auth; | |
1127 | } | |
1128 | ||
1129 | static struct rpc_auth * | |
1130 | gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) | |
1131 | { | |
1132 | struct gss_auth *gss_auth; | |
1133 | struct rpc_xprt *xprt = rcu_access_pointer(clnt->cl_xprt); | |
1134 | ||
1135 | while (clnt != clnt->cl_parent) { | |
1136 | struct rpc_clnt *parent = clnt->cl_parent; | |
1137 | /* Find the original parent for this transport */ | |
1138 | if (rcu_access_pointer(parent->cl_xprt) != xprt) | |
1139 | break; | |
1140 | clnt = parent; | |
1141 | } | |
1142 | ||
1143 | gss_auth = gss_create_hashed(args, clnt); | |
1144 | if (IS_ERR(gss_auth)) | |
1145 | return ERR_CAST(gss_auth); | |
1146 | return &gss_auth->rpc_auth; | |
1147 | } | |
1148 | ||
0df7fb74 TM |
1149 | /* |
1150 | * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call | |
1151 | * to the server with the GSS control procedure field set to | |
1152 | * RPC_GSS_PROC_DESTROY. This should normally cause the server to release | |
1153 | * all RPCSEC_GSS state associated with that context. | |
1154 | */ | |
1155 | static int | |
1156 | gss_destroying_context(struct rpc_cred *cred) | |
1157 | { | |
1158 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
1159 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); | |
1160 | struct rpc_task *task; | |
1161 | ||
1162 | if (gss_cred->gc_ctx == NULL || | |
6dcd3926 | 1163 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) |
0df7fb74 TM |
1164 | return 0; |
1165 | ||
1166 | gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; | |
1167 | cred->cr_ops = &gss_nullops; | |
1168 | ||
1169 | /* Take a reference to ensure the cred will be destroyed either | |
1170 | * by the RPC call or by the put_rpccred() below */ | |
1171 | get_rpccred(cred); | |
1172 | ||
080a1f14 | 1173 | task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); |
0df7fb74 TM |
1174 | if (!IS_ERR(task)) |
1175 | rpc_put_task(task); | |
1176 | ||
1177 | put_rpccred(cred); | |
1178 | return 1; | |
1179 | } | |
1180 | ||
1181 | /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure | |
1da177e4 LT |
1182 | * to create a new cred or context, so they check that things have been |
1183 | * allocated before freeing them. */ | |
1184 | static void | |
5d28dc82 | 1185 | gss_do_free_ctx(struct gss_cl_ctx *ctx) |
1da177e4 | 1186 | { |
632f0d05 | 1187 | dprintk("RPC: %s\n", __func__); |
1da177e4 | 1188 | |
0d8a3746 | 1189 | gss_delete_sec_context(&ctx->gc_gss_ctx); |
1da177e4 LT |
1190 | kfree(ctx->gc_wire_ctx.data); |
1191 | kfree(ctx); | |
1192 | } | |
1193 | ||
5d28dc82 TM |
1194 | static void |
1195 | gss_free_ctx_callback(struct rcu_head *head) | |
1196 | { | |
1197 | struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); | |
1198 | gss_do_free_ctx(ctx); | |
1199 | } | |
1200 | ||
1201 | static void | |
1202 | gss_free_ctx(struct gss_cl_ctx *ctx) | |
1203 | { | |
1204 | call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); | |
1205 | } | |
1206 | ||
1da177e4 | 1207 | static void |
31be5bf1 | 1208 | gss_free_cred(struct gss_cred *gss_cred) |
1da177e4 | 1209 | { |
632f0d05 | 1210 | dprintk("RPC: %s cred=%p\n", __func__, gss_cred); |
31be5bf1 TM |
1211 | kfree(gss_cred); |
1212 | } | |
1da177e4 | 1213 | |
31be5bf1 TM |
1214 | static void |
1215 | gss_free_cred_callback(struct rcu_head *head) | |
1216 | { | |
1217 | struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); | |
1218 | gss_free_cred(gss_cred); | |
1219 | } | |
1da177e4 | 1220 | |
31be5bf1 | 1221 | static void |
6dcd3926 | 1222 | gss_destroy_nullcred(struct rpc_cred *cred) |
31be5bf1 | 1223 | { |
5d28dc82 | 1224 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
0285ed1f | 1225 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); |
5d28dc82 TM |
1226 | struct gss_cl_ctx *ctx = gss_cred->gc_ctx; |
1227 | ||
a9b3cd7f | 1228 | RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); |
31be5bf1 | 1229 | call_rcu(&cred->cr_rcu, gss_free_cred_callback); |
5d28dc82 TM |
1230 | if (ctx) |
1231 | gss_put_ctx(ctx); | |
0285ed1f | 1232 | kref_put(&gss_auth->kref, gss_free_callback); |
1da177e4 LT |
1233 | } |
1234 | ||
6dcd3926 JL |
1235 | static void |
1236 | gss_destroy_cred(struct rpc_cred *cred) | |
1237 | { | |
1238 | ||
1239 | if (gss_destroying_context(cred)) | |
1240 | return; | |
1241 | gss_destroy_nullcred(cred); | |
1242 | } | |
1243 | ||
1da177e4 LT |
1244 | /* |
1245 | * Lookup RPCSEC_GSS cred for the current process | |
1246 | */ | |
1247 | static struct rpc_cred * | |
8a317760 | 1248 | gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
1da177e4 | 1249 | { |
8a317760 | 1250 | return rpcauth_lookup_credcache(auth, acred, flags); |
1da177e4 LT |
1251 | } |
1252 | ||
1253 | static struct rpc_cred * | |
8a317760 | 1254 | gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
1da177e4 LT |
1255 | { |
1256 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); | |
1257 | struct gss_cred *cred = NULL; | |
1258 | int err = -ENOMEM; | |
1259 | ||
632f0d05 | 1260 | dprintk("RPC: %s for uid %d, flavor %d\n", |
cdba321e EB |
1261 | __func__, from_kuid(&init_user_ns, acred->uid), |
1262 | auth->au_flavor); | |
1da177e4 | 1263 | |
0f38b873 | 1264 | if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) |
1da177e4 LT |
1265 | goto out_err; |
1266 | ||
5fe4755e | 1267 | rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); |
1da177e4 LT |
1268 | /* |
1269 | * Note: in order to force a call to call_refresh(), we deliberately | |
1270 | * fail to flag the credential as RPCAUTH_CRED_UPTODATE. | |
1271 | */ | |
fc432dd9 | 1272 | cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; |
1da177e4 | 1273 | cred->gc_service = gss_auth->service; |
68c97153 TM |
1274 | cred->gc_principal = NULL; |
1275 | if (acred->machine_cred) | |
1276 | cred->gc_principal = acred->principal; | |
0285ed1f | 1277 | kref_get(&gss_auth->kref); |
1da177e4 LT |
1278 | return &cred->gc_base; |
1279 | ||
1280 | out_err: | |
632f0d05 | 1281 | dprintk("RPC: %s failed with error %d\n", __func__, err); |
1da177e4 LT |
1282 | return ERR_PTR(err); |
1283 | } | |
1284 | ||
fba3bad4 TM |
1285 | static int |
1286 | gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) | |
1287 | { | |
1288 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); | |
1289 | struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); | |
1290 | int err; | |
1291 | ||
1292 | do { | |
1293 | err = gss_create_upcall(gss_auth, gss_cred); | |
1294 | } while (err == -EAGAIN); | |
1295 | return err; | |
1296 | } | |
1297 | ||
1da177e4 | 1298 | static int |
8a317760 | 1299 | gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) |
1da177e4 LT |
1300 | { |
1301 | struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); | |
1302 | ||
cd019f75 | 1303 | if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) |
8a317760 | 1304 | goto out; |
1da177e4 | 1305 | /* Don't match with creds that have expired. */ |
cd019f75 TM |
1306 | if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) |
1307 | return 0; | |
1308 | if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) | |
1da177e4 | 1309 | return 0; |
8a317760 | 1310 | out: |
68c97153 TM |
1311 | if (acred->principal != NULL) { |
1312 | if (gss_cred->gc_principal == NULL) | |
1313 | return 0; | |
1314 | return strcmp(acred->principal, gss_cred->gc_principal) == 0; | |
1315 | } | |
1316 | if (gss_cred->gc_principal != NULL) | |
7c67db3a | 1317 | return 0; |
0b4d51b0 | 1318 | return uid_eq(rc->cr_uid, acred->uid); |
1da177e4 LT |
1319 | } |
1320 | ||
1321 | /* | |
1322 | * Marshal credentials. | |
1323 | * Maybe we should keep a cached credential for performance reasons. | |
1324 | */ | |
d8ed029d AD |
1325 | static __be32 * |
1326 | gss_marshal(struct rpc_task *task, __be32 *p) | |
1da177e4 | 1327 | { |
a17c2153 TM |
1328 | struct rpc_rqst *req = task->tk_rqstp; |
1329 | struct rpc_cred *cred = req->rq_cred; | |
1da177e4 LT |
1330 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
1331 | gc_base); | |
1332 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
d8ed029d | 1333 | __be32 *cred_len; |
1da177e4 LT |
1334 | u32 maj_stat = 0; |
1335 | struct xdr_netobj mic; | |
1336 | struct kvec iov; | |
1337 | struct xdr_buf verf_buf; | |
1338 | ||
632f0d05 | 1339 | dprintk("RPC: %5u %s\n", task->tk_pid, __func__); |
1da177e4 LT |
1340 | |
1341 | *p++ = htonl(RPC_AUTH_GSS); | |
1342 | cred_len = p++; | |
1343 | ||
1344 | spin_lock(&ctx->gc_seq_lock); | |
1345 | req->rq_seqno = ctx->gc_seq++; | |
1346 | spin_unlock(&ctx->gc_seq_lock); | |
1347 | ||
1348 | *p++ = htonl((u32) RPC_GSS_VERSION); | |
1349 | *p++ = htonl((u32) ctx->gc_proc); | |
1350 | *p++ = htonl((u32) req->rq_seqno); | |
1351 | *p++ = htonl((u32) gss_cred->gc_service); | |
1352 | p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); | |
1353 | *cred_len = htonl((p - (cred_len + 1)) << 2); | |
1354 | ||
1355 | /* We compute the checksum for the verifier over the xdr-encoded bytes | |
1356 | * starting with the xid and ending at the end of the credential: */ | |
a4f0835c | 1357 | iov.iov_base = xprt_skip_transport_header(req->rq_xprt, |
808012fb | 1358 | req->rq_snd_buf.head[0].iov_base); |
1da177e4 LT |
1359 | iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; |
1360 | xdr_buf_from_iov(&iov, &verf_buf); | |
1361 | ||
1362 | /* set verifier flavor*/ | |
1363 | *p++ = htonl(RPC_AUTH_GSS); | |
1364 | ||
1365 | mic.data = (u8 *)(p + 1); | |
00fd6e14 | 1366 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
1da177e4 | 1367 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) { |
fc432dd9 | 1368 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 LT |
1369 | } else if (maj_stat != 0) { |
1370 | printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); | |
1371 | goto out_put_ctx; | |
1372 | } | |
1373 | p = xdr_encode_opaque(p, NULL, mic.len); | |
1374 | gss_put_ctx(ctx); | |
1375 | return p; | |
1376 | out_put_ctx: | |
1377 | gss_put_ctx(ctx); | |
1378 | return NULL; | |
1379 | } | |
1380 | ||
cd019f75 TM |
1381 | static int gss_renew_cred(struct rpc_task *task) |
1382 | { | |
a17c2153 | 1383 | struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; |
cd019f75 TM |
1384 | struct gss_cred *gss_cred = container_of(oldcred, |
1385 | struct gss_cred, | |
1386 | gc_base); | |
1387 | struct rpc_auth *auth = oldcred->cr_auth; | |
1388 | struct auth_cred acred = { | |
1389 | .uid = oldcred->cr_uid, | |
68c97153 TM |
1390 | .principal = gss_cred->gc_principal, |
1391 | .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), | |
cd019f75 TM |
1392 | }; |
1393 | struct rpc_cred *new; | |
1394 | ||
1395 | new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); | |
1396 | if (IS_ERR(new)) | |
1397 | return PTR_ERR(new); | |
a17c2153 | 1398 | task->tk_rqstp->rq_cred = new; |
cd019f75 TM |
1399 | put_rpccred(oldcred); |
1400 | return 0; | |
1401 | } | |
1402 | ||
126e216a TM |
1403 | static int gss_cred_is_negative_entry(struct rpc_cred *cred) |
1404 | { | |
1405 | if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { | |
1406 | unsigned long now = jiffies; | |
1407 | unsigned long begin, expire; | |
1408 | struct gss_cred *gss_cred; | |
1409 | ||
1410 | gss_cred = container_of(cred, struct gss_cred, gc_base); | |
1411 | begin = gss_cred->gc_upcall_timestamp; | |
1412 | expire = begin + gss_expired_cred_retry_delay * HZ; | |
1413 | ||
1414 | if (time_in_range_open(now, begin, expire)) | |
1415 | return 1; | |
1416 | } | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1da177e4 LT |
1420 | /* |
1421 | * Refresh credentials. XXX - finish | |
1422 | */ | |
1423 | static int | |
1424 | gss_refresh(struct rpc_task *task) | |
1425 | { | |
a17c2153 | 1426 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
cd019f75 TM |
1427 | int ret = 0; |
1428 | ||
126e216a TM |
1429 | if (gss_cred_is_negative_entry(cred)) |
1430 | return -EKEYEXPIRED; | |
1431 | ||
cd019f75 TM |
1432 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && |
1433 | !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { | |
1434 | ret = gss_renew_cred(task); | |
1435 | if (ret < 0) | |
1436 | goto out; | |
a17c2153 | 1437 | cred = task->tk_rqstp->rq_cred; |
cd019f75 | 1438 | } |
1da177e4 | 1439 | |
cd019f75 TM |
1440 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
1441 | ret = gss_refresh_upcall(task); | |
1442 | out: | |
1443 | return ret; | |
1da177e4 LT |
1444 | } |
1445 | ||
0df7fb74 TM |
1446 | /* Dummy refresh routine: used only when destroying the context */ |
1447 | static int | |
1448 | gss_refresh_null(struct rpc_task *task) | |
1449 | { | |
1450 | return -EACCES; | |
1451 | } | |
1452 | ||
d8ed029d AD |
1453 | static __be32 * |
1454 | gss_validate(struct rpc_task *task, __be32 *p) | |
1da177e4 | 1455 | { |
a17c2153 | 1456 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
1da177e4 | 1457 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); |
d8ed029d | 1458 | __be32 seq; |
1da177e4 LT |
1459 | struct kvec iov; |
1460 | struct xdr_buf verf_buf; | |
1461 | struct xdr_netobj mic; | |
1462 | u32 flav,len; | |
1463 | u32 maj_stat; | |
1464 | ||
632f0d05 | 1465 | dprintk("RPC: %5u %s\n", task->tk_pid, __func__); |
1da177e4 LT |
1466 | |
1467 | flav = ntohl(*p++); | |
1468 | if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) | |
cca5172a | 1469 | goto out_bad; |
1da177e4 LT |
1470 | if (flav != RPC_AUTH_GSS) |
1471 | goto out_bad; | |
1472 | seq = htonl(task->tk_rqstp->rq_seqno); | |
1473 | iov.iov_base = &seq; | |
1474 | iov.iov_len = sizeof(seq); | |
1475 | xdr_buf_from_iov(&iov, &verf_buf); | |
1476 | mic.data = (u8 *)p; | |
1477 | mic.len = len; | |
1478 | ||
00fd6e14 | 1479 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
1da177e4 | 1480 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1481 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
0df7fb74 | 1482 | if (maj_stat) { |
632f0d05 CL |
1483 | dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", |
1484 | task->tk_pid, __func__, maj_stat); | |
1da177e4 | 1485 | goto out_bad; |
0df7fb74 | 1486 | } |
24b2605b BF |
1487 | /* We leave it to unwrap to calculate au_rslack. For now we just |
1488 | * calculate the length of the verifier: */ | |
1be27f36 | 1489 | cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; |
1da177e4 | 1490 | gss_put_ctx(ctx); |
632f0d05 CL |
1491 | dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", |
1492 | task->tk_pid, __func__); | |
1da177e4 LT |
1493 | return p + XDR_QUADLEN(len); |
1494 | out_bad: | |
1495 | gss_put_ctx(ctx); | |
632f0d05 | 1496 | dprintk("RPC: %5u %s failed.\n", task->tk_pid, __func__); |
1da177e4 LT |
1497 | return NULL; |
1498 | } | |
1499 | ||
9f06c719 CL |
1500 | static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, |
1501 | __be32 *p, void *obj) | |
1502 | { | |
1503 | struct xdr_stream xdr; | |
1504 | ||
1505 | xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); | |
1506 | encode(rqstp, &xdr, obj); | |
1507 | } | |
1508 | ||
1da177e4 LT |
1509 | static inline int |
1510 | gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
9f06c719 CL |
1511 | kxdreproc_t encode, struct rpc_rqst *rqstp, |
1512 | __be32 *p, void *obj) | |
1da177e4 LT |
1513 | { |
1514 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; | |
1515 | struct xdr_buf integ_buf; | |
d8ed029d | 1516 | __be32 *integ_len = NULL; |
1da177e4 | 1517 | struct xdr_netobj mic; |
d8ed029d AD |
1518 | u32 offset; |
1519 | __be32 *q; | |
1da177e4 LT |
1520 | struct kvec *iov; |
1521 | u32 maj_stat = 0; | |
1522 | int status = -EIO; | |
1523 | ||
1524 | integ_len = p++; | |
1525 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; | |
1526 | *p++ = htonl(rqstp->rq_seqno); | |
1527 | ||
9f06c719 | 1528 | gss_wrap_req_encode(encode, rqstp, p, obj); |
1da177e4 LT |
1529 | |
1530 | if (xdr_buf_subsegment(snd_buf, &integ_buf, | |
1531 | offset, snd_buf->len - offset)) | |
1532 | return status; | |
1533 | *integ_len = htonl(integ_buf.len); | |
1534 | ||
1535 | /* guess whether we're in the head or the tail: */ | |
cca5172a | 1536 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) |
1da177e4 LT |
1537 | iov = snd_buf->tail; |
1538 | else | |
1539 | iov = snd_buf->head; | |
1540 | p = iov->iov_base + iov->iov_len; | |
1541 | mic.data = (u8 *)(p + 1); | |
1542 | ||
00fd6e14 | 1543 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); |
1da177e4 LT |
1544 | status = -EIO; /* XXX? */ |
1545 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) | |
fc432dd9 | 1546 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 LT |
1547 | else if (maj_stat) |
1548 | return status; | |
1549 | q = xdr_encode_opaque(p, NULL, mic.len); | |
1550 | ||
1551 | offset = (u8 *)q - (u8 *)p; | |
1552 | iov->iov_len += offset; | |
1553 | snd_buf->len += offset; | |
1554 | return 0; | |
1555 | } | |
1556 | ||
2d2da60c BF |
1557 | static void |
1558 | priv_release_snd_buf(struct rpc_rqst *rqstp) | |
1559 | { | |
1560 | int i; | |
1561 | ||
1562 | for (i=0; i < rqstp->rq_enc_pages_num; i++) | |
1563 | __free_page(rqstp->rq_enc_pages[i]); | |
1564 | kfree(rqstp->rq_enc_pages); | |
1565 | } | |
1566 | ||
1567 | static int | |
1568 | alloc_enc_pages(struct rpc_rqst *rqstp) | |
1569 | { | |
1570 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; | |
1571 | int first, last, i; | |
1572 | ||
1573 | if (snd_buf->page_len == 0) { | |
1574 | rqstp->rq_enc_pages_num = 0; | |
1575 | return 0; | |
1576 | } | |
1577 | ||
1578 | first = snd_buf->page_base >> PAGE_CACHE_SHIFT; | |
1579 | last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; | |
1580 | rqstp->rq_enc_pages_num = last - first + 1 + 1; | |
1581 | rqstp->rq_enc_pages | |
1582 | = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), | |
1583 | GFP_NOFS); | |
1584 | if (!rqstp->rq_enc_pages) | |
1585 | goto out; | |
1586 | for (i=0; i < rqstp->rq_enc_pages_num; i++) { | |
1587 | rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); | |
1588 | if (rqstp->rq_enc_pages[i] == NULL) | |
1589 | goto out_free; | |
1590 | } | |
1591 | rqstp->rq_release_snd_buf = priv_release_snd_buf; | |
1592 | return 0; | |
1593 | out_free: | |
cdead7cf TM |
1594 | rqstp->rq_enc_pages_num = i; |
1595 | priv_release_snd_buf(rqstp); | |
2d2da60c BF |
1596 | out: |
1597 | return -EAGAIN; | |
1598 | } | |
1599 | ||
1600 | static inline int | |
1601 | gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
9f06c719 CL |
1602 | kxdreproc_t encode, struct rpc_rqst *rqstp, |
1603 | __be32 *p, void *obj) | |
2d2da60c BF |
1604 | { |
1605 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; | |
1606 | u32 offset; | |
1607 | u32 maj_stat; | |
1608 | int status; | |
d8ed029d | 1609 | __be32 *opaque_len; |
2d2da60c BF |
1610 | struct page **inpages; |
1611 | int first; | |
1612 | int pad; | |
1613 | struct kvec *iov; | |
1614 | char *tmp; | |
1615 | ||
1616 | opaque_len = p++; | |
1617 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; | |
1618 | *p++ = htonl(rqstp->rq_seqno); | |
1619 | ||
9f06c719 | 1620 | gss_wrap_req_encode(encode, rqstp, p, obj); |
2d2da60c BF |
1621 | |
1622 | status = alloc_enc_pages(rqstp); | |
1623 | if (status) | |
1624 | return status; | |
1625 | first = snd_buf->page_base >> PAGE_CACHE_SHIFT; | |
1626 | inpages = snd_buf->pages + first; | |
1627 | snd_buf->pages = rqstp->rq_enc_pages; | |
1628 | snd_buf->page_base -= first << PAGE_CACHE_SHIFT; | |
7561042f KC |
1629 | /* |
1630 | * Give the tail its own page, in case we need extra space in the | |
1631 | * head when wrapping: | |
1632 | * | |
1633 | * call_allocate() allocates twice the slack space required | |
1634 | * by the authentication flavor to rq_callsize. | |
1635 | * For GSS, slack is GSS_CRED_SLACK. | |
1636 | */ | |
2d2da60c BF |
1637 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) { |
1638 | tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); | |
1639 | memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); | |
1640 | snd_buf->tail[0].iov_base = tmp; | |
1641 | } | |
00fd6e14 | 1642 | maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); |
7561042f | 1643 | /* slack space should prevent this ever happening: */ |
2d2da60c | 1644 | BUG_ON(snd_buf->len > snd_buf->buflen); |
cca5172a | 1645 | status = -EIO; |
2d2da60c BF |
1646 | /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was |
1647 | * done anyway, so it's safe to put the request on the wire: */ | |
1648 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) | |
fc432dd9 | 1649 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
2d2da60c BF |
1650 | else if (maj_stat) |
1651 | return status; | |
1652 | ||
1653 | *opaque_len = htonl(snd_buf->len - offset); | |
1654 | /* guess whether we're in the head or the tail: */ | |
1655 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) | |
1656 | iov = snd_buf->tail; | |
1657 | else | |
1658 | iov = snd_buf->head; | |
1659 | p = iov->iov_base + iov->iov_len; | |
1660 | pad = 3 - ((snd_buf->len - offset - 1) & 3); | |
1661 | memset(p, 0, pad); | |
1662 | iov->iov_len += pad; | |
1663 | snd_buf->len += pad; | |
1664 | ||
1665 | return 0; | |
1666 | } | |
1667 | ||
1da177e4 LT |
1668 | static int |
1669 | gss_wrap_req(struct rpc_task *task, | |
9f06c719 | 1670 | kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) |
1da177e4 | 1671 | { |
a17c2153 | 1672 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
1da177e4 LT |
1673 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
1674 | gc_base); | |
1675 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
1676 | int status = -EIO; | |
1677 | ||
632f0d05 | 1678 | dprintk("RPC: %5u %s\n", task->tk_pid, __func__); |
1da177e4 LT |
1679 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) { |
1680 | /* The spec seems a little ambiguous here, but I think that not | |
1681 | * wrapping context destruction requests makes the most sense. | |
1682 | */ | |
9f06c719 CL |
1683 | gss_wrap_req_encode(encode, rqstp, p, obj); |
1684 | status = 0; | |
1da177e4 LT |
1685 | goto out; |
1686 | } | |
1687 | switch (gss_cred->gc_service) { | |
89f0e4fe JP |
1688 | case RPC_GSS_SVC_NONE: |
1689 | gss_wrap_req_encode(encode, rqstp, p, obj); | |
1690 | status = 0; | |
1691 | break; | |
1692 | case RPC_GSS_SVC_INTEGRITY: | |
1693 | status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); | |
1694 | break; | |
1695 | case RPC_GSS_SVC_PRIVACY: | |
1696 | status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); | |
1697 | break; | |
1da177e4 LT |
1698 | } |
1699 | out: | |
1700 | gss_put_ctx(ctx); | |
632f0d05 | 1701 | dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); |
1da177e4 LT |
1702 | return status; |
1703 | } | |
1704 | ||
1705 | static inline int | |
1706 | gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
d8ed029d | 1707 | struct rpc_rqst *rqstp, __be32 **p) |
1da177e4 LT |
1708 | { |
1709 | struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; | |
1710 | struct xdr_buf integ_buf; | |
1711 | struct xdr_netobj mic; | |
1712 | u32 data_offset, mic_offset; | |
1713 | u32 integ_len; | |
1714 | u32 maj_stat; | |
1715 | int status = -EIO; | |
1716 | ||
1717 | integ_len = ntohl(*(*p)++); | |
1718 | if (integ_len & 3) | |
1719 | return status; | |
1720 | data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; | |
1721 | mic_offset = integ_len + data_offset; | |
1722 | if (mic_offset > rcv_buf->len) | |
1723 | return status; | |
1724 | if (ntohl(*(*p)++) != rqstp->rq_seqno) | |
1725 | return status; | |
1726 | ||
1727 | if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, | |
1728 | mic_offset - data_offset)) | |
1729 | return status; | |
1730 | ||
1731 | if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) | |
1732 | return status; | |
1733 | ||
00fd6e14 | 1734 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); |
1da177e4 | 1735 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1736 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 LT |
1737 | if (maj_stat != GSS_S_COMPLETE) |
1738 | return status; | |
1739 | return 0; | |
1740 | } | |
1741 | ||
2d2da60c BF |
1742 | static inline int |
1743 | gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
d8ed029d | 1744 | struct rpc_rqst *rqstp, __be32 **p) |
2d2da60c BF |
1745 | { |
1746 | struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; | |
1747 | u32 offset; | |
1748 | u32 opaque_len; | |
1749 | u32 maj_stat; | |
1750 | int status = -EIO; | |
1751 | ||
1752 | opaque_len = ntohl(*(*p)++); | |
1753 | offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; | |
1754 | if (offset + opaque_len > rcv_buf->len) | |
1755 | return status; | |
1756 | /* remove padding: */ | |
1757 | rcv_buf->len = offset + opaque_len; | |
1758 | ||
00fd6e14 | 1759 | maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); |
2d2da60c | 1760 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1761 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
2d2da60c BF |
1762 | if (maj_stat != GSS_S_COMPLETE) |
1763 | return status; | |
1764 | if (ntohl(*(*p)++) != rqstp->rq_seqno) | |
1765 | return status; | |
1766 | ||
1767 | return 0; | |
1768 | } | |
1769 | ||
bf269551 CL |
1770 | static int |
1771 | gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, | |
1772 | __be32 *p, void *obj) | |
1773 | { | |
1774 | struct xdr_stream xdr; | |
1775 | ||
1776 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); | |
1777 | return decode(rqstp, &xdr, obj); | |
1778 | } | |
2d2da60c | 1779 | |
1da177e4 LT |
1780 | static int |
1781 | gss_unwrap_resp(struct rpc_task *task, | |
bf269551 | 1782 | kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) |
1da177e4 | 1783 | { |
a17c2153 | 1784 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
1da177e4 LT |
1785 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
1786 | gc_base); | |
1787 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
d8ed029d | 1788 | __be32 *savedp = p; |
2d2da60c BF |
1789 | struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; |
1790 | int savedlen = head->iov_len; | |
1da177e4 LT |
1791 | int status = -EIO; |
1792 | ||
1793 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) | |
1794 | goto out_decode; | |
1795 | switch (gss_cred->gc_service) { | |
89f0e4fe JP |
1796 | case RPC_GSS_SVC_NONE: |
1797 | break; | |
1798 | case RPC_GSS_SVC_INTEGRITY: | |
1799 | status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); | |
1800 | if (status) | |
1801 | goto out; | |
1802 | break; | |
1803 | case RPC_GSS_SVC_PRIVACY: | |
1804 | status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); | |
1805 | if (status) | |
1806 | goto out; | |
1807 | break; | |
1da177e4 | 1808 | } |
24b2605b | 1809 | /* take into account extra slack for integrity and privacy cases: */ |
1be27f36 | 1810 | cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) |
2d2da60c | 1811 | + (savedlen - head->iov_len); |
1da177e4 | 1812 | out_decode: |
bf269551 | 1813 | status = gss_unwrap_req_decode(decode, rqstp, p, obj); |
1da177e4 LT |
1814 | out: |
1815 | gss_put_ctx(ctx); | |
632f0d05 CL |
1816 | dprintk("RPC: %5u %s returning %d\n", |
1817 | task->tk_pid, __func__, status); | |
1da177e4 LT |
1818 | return status; |
1819 | } | |
cca5172a | 1820 | |
f1c0a861 | 1821 | static const struct rpc_authops authgss_ops = { |
1da177e4 LT |
1822 | .owner = THIS_MODULE, |
1823 | .au_flavor = RPC_AUTH_GSS, | |
1da177e4 | 1824 | .au_name = "RPCSEC_GSS", |
1da177e4 LT |
1825 | .create = gss_create, |
1826 | .destroy = gss_destroy, | |
1827 | .lookup_cred = gss_lookup_cred, | |
80df9d20 | 1828 | .crcreate = gss_create_cred, |
6a1a1e34 | 1829 | .list_pseudoflavors = gss_mech_list_pseudoflavors, |
9568c5e9 | 1830 | .info2flavor = gss_mech_info2flavor, |
a77c806f | 1831 | .flavor2info = gss_mech_flavor2info, |
1da177e4 LT |
1832 | }; |
1833 | ||
f1c0a861 | 1834 | static const struct rpc_credops gss_credops = { |
1da177e4 LT |
1835 | .cr_name = "AUTH_GSS", |
1836 | .crdestroy = gss_destroy_cred, | |
fba3bad4 | 1837 | .cr_init = gss_cred_init, |
5c691044 | 1838 | .crbind = rpcauth_generic_bind_cred, |
1da177e4 LT |
1839 | .crmatch = gss_match, |
1840 | .crmarshal = gss_marshal, | |
1841 | .crrefresh = gss_refresh, | |
1842 | .crvalidate = gss_validate, | |
1843 | .crwrap_req = gss_wrap_req, | |
1844 | .crunwrap_resp = gss_unwrap_resp, | |
1845 | }; | |
1846 | ||
0df7fb74 TM |
1847 | static const struct rpc_credops gss_nullops = { |
1848 | .cr_name = "AUTH_GSS", | |
6dcd3926 | 1849 | .crdestroy = gss_destroy_nullcred, |
5c691044 | 1850 | .crbind = rpcauth_generic_bind_cred, |
0df7fb74 TM |
1851 | .crmatch = gss_match, |
1852 | .crmarshal = gss_marshal, | |
1853 | .crrefresh = gss_refresh_null, | |
1854 | .crvalidate = gss_validate, | |
1855 | .crwrap_req = gss_wrap_req, | |
1856 | .crunwrap_resp = gss_unwrap_resp, | |
1857 | }; | |
1858 | ||
b693ba4a | 1859 | static const struct rpc_pipe_ops gss_upcall_ops_v0 = { |
c1225158 | 1860 | .upcall = rpc_pipe_generic_upcall, |
34769fc4 BF |
1861 | .downcall = gss_pipe_downcall, |
1862 | .destroy_msg = gss_pipe_destroy_msg, | |
1863 | .open_pipe = gss_pipe_open_v0, | |
1864 | .release_pipe = gss_pipe_release, | |
1865 | }; | |
1866 | ||
b693ba4a | 1867 | static const struct rpc_pipe_ops gss_upcall_ops_v1 = { |
c1225158 | 1868 | .upcall = rpc_pipe_generic_upcall, |
1da177e4 LT |
1869 | .downcall = gss_pipe_downcall, |
1870 | .destroy_msg = gss_pipe_destroy_msg, | |
34769fc4 | 1871 | .open_pipe = gss_pipe_open_v1, |
1da177e4 LT |
1872 | .release_pipe = gss_pipe_release, |
1873 | }; | |
1874 | ||
a1db410d SK |
1875 | static __net_init int rpcsec_gss_init_net(struct net *net) |
1876 | { | |
1877 | return gss_svc_init_net(net); | |
1878 | } | |
1879 | ||
1880 | static __net_exit void rpcsec_gss_exit_net(struct net *net) | |
1881 | { | |
1882 | gss_svc_shutdown_net(net); | |
1883 | } | |
1884 | ||
1885 | static struct pernet_operations rpcsec_gss_net_ops = { | |
1886 | .init = rpcsec_gss_init_net, | |
1887 | .exit = rpcsec_gss_exit_net, | |
1888 | }; | |
1889 | ||
1da177e4 LT |
1890 | /* |
1891 | * Initialize RPCSEC_GSS module | |
1892 | */ | |
1893 | static int __init init_rpcsec_gss(void) | |
1894 | { | |
1895 | int err = 0; | |
1896 | ||
1897 | err = rpcauth_register(&authgss_ops); | |
1898 | if (err) | |
1899 | goto out; | |
1900 | err = gss_svc_init(); | |
1901 | if (err) | |
1902 | goto out_unregister; | |
a1db410d SK |
1903 | err = register_pernet_subsys(&rpcsec_gss_net_ops); |
1904 | if (err) | |
1905 | goto out_svc_exit; | |
79a3f20b | 1906 | rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); |
1da177e4 | 1907 | return 0; |
a1db410d SK |
1908 | out_svc_exit: |
1909 | gss_svc_shutdown(); | |
1da177e4 LT |
1910 | out_unregister: |
1911 | rpcauth_unregister(&authgss_ops); | |
1912 | out: | |
1913 | return err; | |
1914 | } | |
1915 | ||
1916 | static void __exit exit_rpcsec_gss(void) | |
1917 | { | |
a1db410d | 1918 | unregister_pernet_subsys(&rpcsec_gss_net_ops); |
1da177e4 LT |
1919 | gss_svc_shutdown(); |
1920 | rpcauth_unregister(&authgss_ops); | |
bf12691d | 1921 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
1da177e4 LT |
1922 | } |
1923 | ||
71afa85e | 1924 | MODULE_ALIAS("rpc-auth-6"); |
1da177e4 | 1925 | MODULE_LICENSE("GPL"); |
126e216a TM |
1926 | module_param_named(expired_cred_retry_delay, |
1927 | gss_expired_cred_retry_delay, | |
1928 | uint, 0644); | |
1929 | MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " | |
1930 | "the RPC engine retries an expired credential"); | |
1931 | ||
1da177e4 LT |
1932 | module_init(init_rpcsec_gss) |
1933 | module_exit(exit_rpcsec_gss) |