Commit | Line | Data |
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2573a464 | 1 | // SPDX-License-Identifier: BSD-3-Clause |
1da177e4 | 2 | /* |
f30c2269 | 3 | * linux/net/sunrpc/auth_gss/auth_gss.c |
1da177e4 LT |
4 | * |
5 | * RPCSEC_GSS client authentication. | |
cca5172a | 6 | * |
1da177e4 LT |
7 | * Copyright (c) 2000 The Regents of the University of Michigan. |
8 | * All rights reserved. | |
9 | * | |
10 | * Dug Song <dugsong@monkey.org> | |
11 | * Andy Adamson <andros@umich.edu> | |
1da177e4 LT |
12 | */ |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/init.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
1da177e4 | 18 | #include <linux/sched.h> |
2d2da60c | 19 | #include <linux/pagemap.h> |
1da177e4 LT |
20 | #include <linux/sunrpc/clnt.h> |
21 | #include <linux/sunrpc/auth.h> | |
22 | #include <linux/sunrpc/auth_gss.h> | |
df513a77 | 23 | #include <linux/sunrpc/gss_krb5.h> |
1da177e4 LT |
24 | #include <linux/sunrpc/svcauth_gss.h> |
25 | #include <linux/sunrpc/gss_err.h> | |
26 | #include <linux/workqueue.h> | |
27 | #include <linux/sunrpc/rpc_pipe_fs.h> | |
28 | #include <linux/sunrpc/gss_api.h> | |
7c0f6ba6 | 29 | #include <linux/uaccess.h> |
eb6dc19d | 30 | #include <linux/hashtable.h> |
1da177e4 | 31 | |
abfdbd53 TM |
32 | #include "../netns.h" |
33 | ||
0c77668d CL |
34 | #include <trace/events/rpcgss.h> |
35 | ||
f1c0a861 | 36 | static const struct rpc_authops authgss_ops; |
1da177e4 | 37 | |
f1c0a861 | 38 | static const struct rpc_credops gss_credops; |
0df7fb74 | 39 | static const struct rpc_credops gss_nullops; |
1da177e4 | 40 | |
126e216a TM |
41 | #define GSS_RETRY_EXPIRED 5 |
42 | static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; | |
43 | ||
4de6caa2 AA |
44 | #define GSS_KEY_EXPIRE_TIMEO 240 |
45 | static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO; | |
46 | ||
f895b252 | 47 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
1da177e4 LT |
48 | # define RPCDBG_FACILITY RPCDBG_AUTH |
49 | #endif | |
50 | ||
725f2865 | 51 | #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) |
1da177e4 LT |
52 | /* length of a krb5 verifier (48), plus data added before arguments when |
53 | * using integrity (two 4-byte integers): */ | |
adeb8133 | 54 | #define GSS_VERF_SLACK 100 |
1da177e4 | 55 | |
23c323af | 56 | static DEFINE_HASHTABLE(gss_auth_hash_table, 4); |
eb6dc19d TM |
57 | static DEFINE_SPINLOCK(gss_auth_hash_lock); |
58 | ||
19172284 TM |
59 | struct gss_pipe { |
60 | struct rpc_pipe_dir_object pdo; | |
61 | struct rpc_pipe *pipe; | |
62 | struct rpc_clnt *clnt; | |
63 | const char *name; | |
414a6295 | 64 | struct kref kref; |
19172284 TM |
65 | }; |
66 | ||
1da177e4 | 67 | struct gss_auth { |
0285ed1f | 68 | struct kref kref; |
eb6dc19d | 69 | struct hlist_node hash; |
1da177e4 LT |
70 | struct rpc_auth rpc_auth; |
71 | struct gss_api_mech *mech; | |
72 | enum rpc_gss_svc service; | |
1da177e4 | 73 | struct rpc_clnt *client; |
e726340a | 74 | struct net *net; |
34769fc4 BF |
75 | /* |
76 | * There are two upcall pipes; dentry[1], named "gssd", is used | |
77 | * for the new text-based upcall; dentry[0] is named after the | |
78 | * mechanism (for example, "krb5") and exists for | |
79 | * backwards-compatibility with older gssd's. | |
80 | */ | |
19172284 | 81 | struct gss_pipe *gss_pipe[2]; |
bd4a3eb1 | 82 | const char *target_name; |
1da177e4 LT |
83 | }; |
84 | ||
79a3f20b | 85 | /* pipe_version >= 0 if and only if someone has a pipe open. */ |
79a3f20b BF |
86 | static DEFINE_SPINLOCK(pipe_version_lock); |
87 | static struct rpc_wait_queue pipe_version_rpc_waitqueue; | |
88 | static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); | |
9eb2ddb4 | 89 | static void gss_put_auth(struct gss_auth *gss_auth); |
cf81939d | 90 | |
5d28dc82 | 91 | static void gss_free_ctx(struct gss_cl_ctx *); |
b693ba4a TM |
92 | static const struct rpc_pipe_ops gss_upcall_ops_v0; |
93 | static const struct rpc_pipe_ops gss_upcall_ops_v1; | |
1da177e4 | 94 | |
1da177e4 LT |
95 | static inline struct gss_cl_ctx * |
96 | gss_get_ctx(struct gss_cl_ctx *ctx) | |
97 | { | |
0fa10472 | 98 | refcount_inc(&ctx->count); |
1da177e4 LT |
99 | return ctx; |
100 | } | |
101 | ||
102 | static inline void | |
103 | gss_put_ctx(struct gss_cl_ctx *ctx) | |
104 | { | |
0fa10472 | 105 | if (refcount_dec_and_test(&ctx->count)) |
5d28dc82 | 106 | gss_free_ctx(ctx); |
1da177e4 LT |
107 | } |
108 | ||
5d28dc82 TM |
109 | /* gss_cred_set_ctx: |
110 | * called by gss_upcall_callback and gss_create_upcall in order | |
111 | * to set the gss context. The actual exchange of an old context | |
9beae467 | 112 | * and a new one is protected by the pipe->lock. |
5d28dc82 | 113 | */ |
1da177e4 LT |
114 | static void |
115 | gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) | |
116 | { | |
117 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
5d28dc82 | 118 | |
cd019f75 TM |
119 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
120 | return; | |
7b6962b0 | 121 | gss_get_ctx(ctx); |
cf778b00 | 122 | rcu_assign_pointer(gss_cred->gc_ctx, ctx); |
fc432dd9 | 123 | set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
4e857c58 | 124 | smp_mb__before_atomic(); |
fc432dd9 | 125 | clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); |
1da177e4 LT |
126 | } |
127 | ||
128 | static const void * | |
129 | simple_get_bytes(const void *p, const void *end, void *res, size_t len) | |
130 | { | |
131 | const void *q = (const void *)((const char *)p + len); | |
132 | if (unlikely(q > end || q < p)) | |
133 | return ERR_PTR(-EFAULT); | |
134 | memcpy(res, p, len); | |
135 | return q; | |
136 | } | |
137 | ||
138 | static inline const void * | |
139 | simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) | |
140 | { | |
141 | const void *q; | |
142 | unsigned int len; | |
143 | ||
144 | p = simple_get_bytes(p, end, &len, sizeof(len)); | |
145 | if (IS_ERR(p)) | |
146 | return p; | |
147 | q = (const void *)((const char *)p + len); | |
148 | if (unlikely(q > end || q < p)) | |
149 | return ERR_PTR(-EFAULT); | |
0f38b873 | 150 | dest->data = kmemdup(p, len, GFP_NOFS); |
1da177e4 LT |
151 | if (unlikely(dest->data == NULL)) |
152 | return ERR_PTR(-ENOMEM); | |
153 | dest->len = len; | |
1da177e4 LT |
154 | return q; |
155 | } | |
156 | ||
157 | static struct gss_cl_ctx * | |
158 | gss_cred_get_ctx(struct rpc_cred *cred) | |
159 | { | |
160 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
161 | struct gss_cl_ctx *ctx = NULL; | |
162 | ||
5d28dc82 | 163 | rcu_read_lock(); |
c5e6aecd JL |
164 | ctx = rcu_dereference(gss_cred->gc_ctx); |
165 | if (ctx) | |
166 | gss_get_ctx(ctx); | |
5d28dc82 | 167 | rcu_read_unlock(); |
1da177e4 LT |
168 | return ctx; |
169 | } | |
170 | ||
171 | static struct gss_cl_ctx * | |
172 | gss_alloc_context(void) | |
173 | { | |
174 | struct gss_cl_ctx *ctx; | |
175 | ||
0f38b873 | 176 | ctx = kzalloc(sizeof(*ctx), GFP_NOFS); |
1da177e4 | 177 | if (ctx != NULL) { |
1da177e4 LT |
178 | ctx->gc_proc = RPC_GSS_PROC_DATA; |
179 | ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ | |
180 | spin_lock_init(&ctx->gc_seq_lock); | |
0fa10472 | 181 | refcount_set(&ctx->count,1); |
1da177e4 LT |
182 | } |
183 | return ctx; | |
184 | } | |
185 | ||
186 | #define GSSD_MIN_TIMEOUT (60 * 60) | |
187 | static const void * | |
188 | gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) | |
189 | { | |
190 | const void *q; | |
191 | unsigned int seclen; | |
192 | unsigned int timeout; | |
620038f6 | 193 | unsigned long now = jiffies; |
1da177e4 LT |
194 | u32 window_size; |
195 | int ret; | |
196 | ||
620038f6 AA |
197 | /* First unsigned int gives the remaining lifetime in seconds of the |
198 | * credential - e.g. the remaining TGT lifetime for Kerberos or | |
199 | * the -t value passed to GSSD. | |
200 | */ | |
1da177e4 LT |
201 | p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); |
202 | if (IS_ERR(p)) | |
203 | goto err; | |
204 | if (timeout == 0) | |
205 | timeout = GSSD_MIN_TIMEOUT; | |
620038f6 AA |
206 | ctx->gc_expiry = now + ((unsigned long)timeout * HZ); |
207 | /* Sequence number window. Determines the maximum number of | |
208 | * simultaneous requests | |
209 | */ | |
1da177e4 LT |
210 | p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); |
211 | if (IS_ERR(p)) | |
212 | goto err; | |
213 | ctx->gc_win = window_size; | |
214 | /* gssd signals an error by passing ctx->gc_win = 0: */ | |
215 | if (ctx->gc_win == 0) { | |
dc5ddce9 JL |
216 | /* |
217 | * in which case, p points to an error code. Anything other | |
218 | * than -EKEYEXPIRED gets converted to -EACCES. | |
219 | */ | |
220 | p = simple_get_bytes(p, end, &ret, sizeof(ret)); | |
221 | if (!IS_ERR(p)) | |
222 | p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : | |
223 | ERR_PTR(-EACCES); | |
1da177e4 LT |
224 | goto err; |
225 | } | |
226 | /* copy the opaque wire context */ | |
227 | p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); | |
228 | if (IS_ERR(p)) | |
229 | goto err; | |
230 | /* import the opaque security context */ | |
231 | p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); | |
232 | if (IS_ERR(p)) | |
233 | goto err; | |
234 | q = (const void *)((const char *)p + seclen); | |
235 | if (unlikely(q > end || q < p)) { | |
236 | p = ERR_PTR(-EFAULT); | |
237 | goto err; | |
238 | } | |
400f26b5 | 239 | ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); |
1da177e4 | 240 | if (ret < 0) { |
0c77668d | 241 | trace_rpcgss_import_ctx(ret); |
1da177e4 LT |
242 | p = ERR_PTR(ret); |
243 | goto err; | |
244 | } | |
2004c726 JL |
245 | |
246 | /* is there any trailing data? */ | |
247 | if (q == end) { | |
248 | p = q; | |
249 | goto done; | |
250 | } | |
251 | ||
252 | /* pull in acceptor name (if there is one) */ | |
253 | p = simple_get_netobj(q, end, &ctx->gc_acceptor); | |
254 | if (IS_ERR(p)) | |
255 | goto err; | |
256 | done: | |
74fb8fec | 257 | trace_rpcgss_context(window_size, ctx->gc_expiry, now, timeout, |
0c77668d | 258 | ctx->gc_acceptor.len, ctx->gc_acceptor.data); |
1da177e4 | 259 | err: |
1da177e4 LT |
260 | return p; |
261 | } | |
262 | ||
a1a23777 CL |
263 | /* XXX: Need some documentation about why UPCALL_BUF_LEN is so small. |
264 | * Is user space expecting no more than UPCALL_BUF_LEN bytes? | |
265 | * Note that there are now _two_ NI_MAXHOST sized data items | |
266 | * being passed in this string. | |
267 | */ | |
268 | #define UPCALL_BUF_LEN 256 | |
1da177e4 LT |
269 | |
270 | struct gss_upcall_msg { | |
7ff13969 | 271 | refcount_t count; |
7eaf040b | 272 | kuid_t uid; |
ac83228a | 273 | const char *service_name; |
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; |
7ff13969 | 313 | if (!refcount_dec_and_test(&gss_msg->count)) |
1da177e4 | 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); |
9eb2ddb4 | 320 | gss_put_auth(gss_msg->auth); |
ac83228a | 321 | kfree_const(gss_msg->service_name); |
1da177e4 LT |
322 | kfree(gss_msg); |
323 | } | |
324 | ||
325 | static struct gss_upcall_msg * | |
9130b8db | 326 | __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid, const struct gss_auth *auth) |
1da177e4 LT |
327 | { |
328 | struct gss_upcall_msg *pos; | |
9beae467 | 329 | list_for_each_entry(pos, &pipe->in_downcall, list) { |
0b4d51b0 | 330 | if (!uid_eq(pos->uid, uid)) |
1da177e4 | 331 | continue; |
9130b8db OK |
332 | if (auth && pos->auth->service != auth->service) |
333 | continue; | |
7ff13969 | 334 | refcount_inc(&pos->count); |
1da177e4 LT |
335 | return pos; |
336 | } | |
1da177e4 LT |
337 | return NULL; |
338 | } | |
339 | ||
720b8f2d | 340 | /* Try to add an upcall to the pipefs queue. |
1da177e4 LT |
341 | * If an upcall owned by our uid already exists, then we return a reference |
342 | * to that upcall instead of adding the new upcall. | |
343 | */ | |
344 | static inline struct gss_upcall_msg * | |
053e324f | 345 | gss_add_msg(struct gss_upcall_msg *gss_msg) |
1da177e4 | 346 | { |
9beae467 | 347 | struct rpc_pipe *pipe = gss_msg->pipe; |
1da177e4 LT |
348 | struct gss_upcall_msg *old; |
349 | ||
9beae467 | 350 | spin_lock(&pipe->lock); |
9130b8db | 351 | old = __gss_find_upcall(pipe, gss_msg->uid, gss_msg->auth); |
1da177e4 | 352 | if (old == NULL) { |
7ff13969 | 353 | refcount_inc(&gss_msg->count); |
9beae467 | 354 | list_add(&gss_msg->list, &pipe->in_downcall); |
1da177e4 LT |
355 | } else |
356 | gss_msg = old; | |
9beae467 | 357 | spin_unlock(&pipe->lock); |
1da177e4 LT |
358 | return gss_msg; |
359 | } | |
360 | ||
361 | static void | |
362 | __gss_unhash_msg(struct gss_upcall_msg *gss_msg) | |
363 | { | |
1da177e4 LT |
364 | list_del_init(&gss_msg->list); |
365 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); | |
366 | wake_up_all(&gss_msg->waitqueue); | |
7ff13969 | 367 | refcount_dec(&gss_msg->count); |
1da177e4 LT |
368 | } |
369 | ||
370 | static void | |
371 | gss_unhash_msg(struct gss_upcall_msg *gss_msg) | |
372 | { | |
9beae467 | 373 | struct rpc_pipe *pipe = gss_msg->pipe; |
1da177e4 | 374 | |
3b68aaea TM |
375 | if (list_empty(&gss_msg->list)) |
376 | return; | |
9beae467 | 377 | spin_lock(&pipe->lock); |
3b68aaea TM |
378 | if (!list_empty(&gss_msg->list)) |
379 | __gss_unhash_msg(gss_msg); | |
9beae467 | 380 | spin_unlock(&pipe->lock); |
1da177e4 LT |
381 | } |
382 | ||
126e216a TM |
383 | static void |
384 | gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) | |
385 | { | |
386 | switch (gss_msg->msg.errno) { | |
387 | case 0: | |
388 | if (gss_msg->ctx == NULL) | |
389 | break; | |
390 | clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); | |
391 | gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); | |
392 | break; | |
393 | case -EKEYEXPIRED: | |
394 | set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); | |
395 | } | |
396 | gss_cred->gc_upcall_timestamp = jiffies; | |
397 | gss_cred->gc_upcall = NULL; | |
398 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); | |
399 | } | |
400 | ||
1da177e4 LT |
401 | static void |
402 | gss_upcall_callback(struct rpc_task *task) | |
403 | { | |
a17c2153 | 404 | struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, |
1da177e4 LT |
405 | struct gss_cred, gc_base); |
406 | struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; | |
9beae467 | 407 | struct rpc_pipe *pipe = gss_msg->pipe; |
1da177e4 | 408 | |
9beae467 | 409 | spin_lock(&pipe->lock); |
126e216a | 410 | gss_handle_downcall_result(gss_cred, gss_msg); |
9beae467 | 411 | spin_unlock(&pipe->lock); |
126e216a | 412 | task->tk_status = gss_msg->msg.errno; |
1da177e4 LT |
413 | gss_release_msg(gss_msg); |
414 | } | |
415 | ||
ac83228a TM |
416 | static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg, |
417 | const struct cred *cred) | |
34769fc4 | 418 | { |
ac83228a | 419 | struct user_namespace *userns = cred->user_ns; |
283ebe3e TM |
420 | |
421 | uid_t uid = from_kuid_munged(userns, gss_msg->uid); | |
90602c7b EB |
422 | memcpy(gss_msg->databuf, &uid, sizeof(uid)); |
423 | gss_msg->msg.data = gss_msg->databuf; | |
424 | gss_msg->msg.len = sizeof(uid); | |
9d3a2260 TM |
425 | |
426 | BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf)); | |
34769fc4 BF |
427 | } |
428 | ||
ac83228a TM |
429 | static ssize_t |
430 | gss_v0_upcall(struct file *file, struct rpc_pipe_msg *msg, | |
431 | char __user *buf, size_t buflen) | |
432 | { | |
433 | struct gss_upcall_msg *gss_msg = container_of(msg, | |
434 | struct gss_upcall_msg, | |
435 | msg); | |
436 | if (msg->copied == 0) | |
437 | gss_encode_v0_msg(gss_msg, file->f_cred); | |
438 | return rpc_pipe_generic_upcall(file, msg, buf, buflen); | |
439 | } | |
440 | ||
9d3a2260 | 441 | static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, |
bd4a3eb1 | 442 | const char *service_name, |
ac83228a TM |
443 | const char *target_name, |
444 | const struct cred *cred) | |
34769fc4 | 445 | { |
ac83228a | 446 | struct user_namespace *userns = cred->user_ns; |
683ac665 | 447 | struct gss_api_mech *mech = gss_msg->auth->mech; |
8b1c7bf5 | 448 | char *p = gss_msg->databuf; |
9d3a2260 TM |
449 | size_t buflen = sizeof(gss_msg->databuf); |
450 | int len; | |
451 | ||
0c77668d | 452 | len = scnprintf(p, buflen, "mech=%s uid=%d", mech->gm_name, |
283ebe3e | 453 | from_kuid_munged(userns, gss_msg->uid)); |
9d3a2260 TM |
454 | buflen -= len; |
455 | p += len; | |
456 | gss_msg->msg.len = len; | |
108b833c CL |
457 | |
458 | /* | |
459 | * target= is a full service principal that names the remote | |
460 | * identity that we are authenticating to. | |
461 | */ | |
bd4a3eb1 | 462 | if (target_name) { |
0c77668d | 463 | len = scnprintf(p, buflen, " target=%s", target_name); |
9d3a2260 | 464 | buflen -= len; |
8b1c7bf5 OK |
465 | p += len; |
466 | gss_msg->msg.len += len; | |
467 | } | |
108b833c CL |
468 | |
469 | /* | |
470 | * gssd uses service= and srchost= to select a matching key from | |
471 | * the system's keytab to use as the source principal. | |
472 | * | |
473 | * service= is the service name part of the source principal, | |
474 | * or "*" (meaning choose any). | |
475 | * | |
476 | * srchost= is the hostname part of the source principal. When | |
477 | * not provided, gssd uses the local hostname. | |
478 | */ | |
a1a23777 CL |
479 | if (service_name) { |
480 | char *c = strchr(service_name, '@'); | |
481 | ||
482 | if (!c) | |
0c77668d | 483 | len = scnprintf(p, buflen, " service=%s", |
a1a23777 CL |
484 | service_name); |
485 | else | |
486 | len = scnprintf(p, buflen, | |
0c77668d | 487 | " service=%.*s srchost=%s", |
a1a23777 CL |
488 | (int)(c - service_name), |
489 | service_name, c + 1); | |
9d3a2260 | 490 | buflen -= len; |
2efef708 OK |
491 | p += len; |
492 | gss_msg->msg.len += len; | |
493 | } | |
108b833c | 494 | |
683ac665 | 495 | if (mech->gm_upcall_enctypes) { |
0c77668d | 496 | len = scnprintf(p, buflen, " enctypes=%s", |
9d3a2260 TM |
497 | mech->gm_upcall_enctypes); |
498 | buflen -= len; | |
683ac665 TM |
499 | p += len; |
500 | gss_msg->msg.len += len; | |
501 | } | |
0c77668d | 502 | trace_rpcgss_upcall_msg(gss_msg->databuf); |
9d3a2260 TM |
503 | len = scnprintf(p, buflen, "\n"); |
504 | if (len == 0) | |
505 | goto out_overflow; | |
8b1c7bf5 | 506 | gss_msg->msg.len += len; |
34769fc4 | 507 | gss_msg->msg.data = gss_msg->databuf; |
9d3a2260 TM |
508 | return 0; |
509 | out_overflow: | |
510 | WARN_ON_ONCE(1); | |
511 | return -ENOMEM; | |
34769fc4 BF |
512 | } |
513 | ||
ac83228a TM |
514 | static ssize_t |
515 | gss_v1_upcall(struct file *file, struct rpc_pipe_msg *msg, | |
516 | char __user *buf, size_t buflen) | |
517 | { | |
518 | struct gss_upcall_msg *gss_msg = container_of(msg, | |
519 | struct gss_upcall_msg, | |
520 | msg); | |
521 | int err; | |
522 | if (msg->copied == 0) { | |
523 | err = gss_encode_v1_msg(gss_msg, | |
524 | gss_msg->service_name, | |
525 | gss_msg->auth->target_name, | |
526 | file->f_cred); | |
527 | if (err) | |
528 | return err; | |
529 | } | |
530 | return rpc_pipe_generic_upcall(file, msg, buf, buflen); | |
531 | } | |
532 | ||
68c97153 | 533 | static struct gss_upcall_msg * |
e726340a | 534 | gss_alloc_msg(struct gss_auth *gss_auth, |
7eaf040b | 535 | kuid_t uid, const char *service_name) |
1da177e4 LT |
536 | { |
537 | struct gss_upcall_msg *gss_msg; | |
79a3f20b | 538 | int vers; |
9d3a2260 | 539 | int err = -ENOMEM; |
1da177e4 | 540 | |
0f38b873 | 541 | gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); |
db75b3d6 | 542 | if (gss_msg == NULL) |
9d3a2260 | 543 | goto err; |
e726340a | 544 | vers = get_pipe_version(gss_auth->net); |
9d3a2260 TM |
545 | err = vers; |
546 | if (err < 0) | |
547 | goto err_free_msg; | |
19172284 | 548 | gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; |
db75b3d6 BF |
549 | INIT_LIST_HEAD(&gss_msg->list); |
550 | rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); | |
551 | init_waitqueue_head(&gss_msg->waitqueue); | |
7ff13969 | 552 | refcount_set(&gss_msg->count, 1); |
db75b3d6 BF |
553 | gss_msg->uid = uid; |
554 | gss_msg->auth = gss_auth; | |
5940d1cf | 555 | kref_get(&gss_auth->kref); |
ac83228a TM |
556 | if (service_name) { |
557 | gss_msg->service_name = kstrdup_const(service_name, GFP_NOFS); | |
fe31ce83 DC |
558 | if (!gss_msg->service_name) { |
559 | err = -ENOMEM; | |
e9776d0f | 560 | goto err_put_pipe_version; |
fe31ce83 | 561 | } |
07d53ae4 | 562 | } |
1da177e4 | 563 | return gss_msg; |
e9776d0f TM |
564 | err_put_pipe_version: |
565 | put_pipe_version(gss_auth->net); | |
9d3a2260 TM |
566 | err_free_msg: |
567 | kfree(gss_msg); | |
568 | err: | |
569 | return ERR_PTR(err); | |
1da177e4 LT |
570 | } |
571 | ||
572 | static struct gss_upcall_msg * | |
e726340a | 573 | gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) |
1da177e4 | 574 | { |
7c67db3a TM |
575 | struct gss_cred *gss_cred = container_of(cred, |
576 | struct gss_cred, gc_base); | |
1da177e4 | 577 | struct gss_upcall_msg *gss_new, *gss_msg; |
04d1532b | 578 | kuid_t uid = cred->cr_cred->fsuid; |
1da177e4 | 579 | |
e726340a | 580 | gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); |
db75b3d6 BF |
581 | if (IS_ERR(gss_new)) |
582 | return gss_new; | |
053e324f | 583 | gss_msg = gss_add_msg(gss_new); |
1da177e4 | 584 | if (gss_msg == gss_new) { |
1cded9d2 | 585 | int res; |
7ff13969 | 586 | refcount_inc(&gss_msg->count); |
1cded9d2 | 587 | res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); |
1da177e4 LT |
588 | if (res) { |
589 | gss_unhash_msg(gss_new); | |
7ff13969 | 590 | refcount_dec(&gss_msg->count); |
1cded9d2 | 591 | gss_release_msg(gss_new); |
1da177e4 LT |
592 | gss_msg = ERR_PTR(res); |
593 | } | |
594 | } else | |
595 | gss_release_msg(gss_new); | |
596 | return gss_msg; | |
597 | } | |
598 | ||
b03568c3 BF |
599 | static void warn_gssd(void) |
600 | { | |
0ea9de0e | 601 | dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); |
b03568c3 BF |
602 | } |
603 | ||
1da177e4 LT |
604 | static inline int |
605 | gss_refresh_upcall(struct rpc_task *task) | |
606 | { | |
a17c2153 | 607 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
4a8c1344 | 608 | struct gss_auth *gss_auth = container_of(cred->cr_auth, |
1da177e4 LT |
609 | struct gss_auth, rpc_auth); |
610 | struct gss_cred *gss_cred = container_of(cred, | |
611 | struct gss_cred, gc_base); | |
612 | struct gss_upcall_msg *gss_msg; | |
9beae467 | 613 | struct rpc_pipe *pipe; |
1da177e4 LT |
614 | int err = 0; |
615 | ||
e726340a | 616 | gss_msg = gss_setup_upcall(gss_auth, cred); |
480e3243 | 617 | if (PTR_ERR(gss_msg) == -EAGAIN) { |
79a3f20b BF |
618 | /* XXX: warning on the first, under the assumption we |
619 | * shouldn't normally hit this case on a refresh. */ | |
620 | warn_gssd(); | |
6b2e6856 TM |
621 | rpc_sleep_on_timeout(&pipe_version_rpc_waitqueue, |
622 | task, NULL, jiffies + (15 * HZ)); | |
0c77668d CL |
623 | err = -EAGAIN; |
624 | goto out; | |
79a3f20b | 625 | } |
1da177e4 LT |
626 | if (IS_ERR(gss_msg)) { |
627 | err = PTR_ERR(gss_msg); | |
628 | goto out; | |
629 | } | |
9beae467 SK |
630 | pipe = gss_msg->pipe; |
631 | spin_lock(&pipe->lock); | |
1da177e4 | 632 | if (gss_cred->gc_upcall != NULL) |
5d00837b | 633 | rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); |
126e216a | 634 | else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { |
1da177e4 LT |
635 | gss_cred->gc_upcall = gss_msg; |
636 | /* gss_upcall_callback will release the reference to gss_upcall_msg */ | |
7ff13969 | 637 | refcount_inc(&gss_msg->count); |
5d00837b | 638 | rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); |
126e216a TM |
639 | } else { |
640 | gss_handle_downcall_result(gss_cred, gss_msg); | |
1da177e4 | 641 | err = gss_msg->msg.errno; |
126e216a | 642 | } |
9beae467 | 643 | spin_unlock(&pipe->lock); |
1da177e4 LT |
644 | gss_release_msg(gss_msg); |
645 | out: | |
0c77668d CL |
646 | trace_rpcgss_upcall_result(from_kuid(&init_user_ns, |
647 | cred->cr_cred->fsuid), err); | |
1da177e4 LT |
648 | return err; |
649 | } | |
650 | ||
651 | static inline int | |
652 | gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) | |
653 | { | |
e726340a | 654 | struct net *net = gss_auth->net; |
abfdbd53 | 655 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
9beae467 | 656 | struct rpc_pipe *pipe; |
1da177e4 LT |
657 | struct rpc_cred *cred = &gss_cred->gc_base; |
658 | struct gss_upcall_msg *gss_msg; | |
659 | DEFINE_WAIT(wait); | |
d36ccb9c | 660 | int err; |
1da177e4 | 661 | |
79a3f20b | 662 | retry: |
d36ccb9c | 663 | err = 0; |
89f84243 JL |
664 | /* if gssd is down, just skip upcalling altogether */ |
665 | if (!gssd_running(net)) { | |
666 | warn_gssd(); | |
0c77668d CL |
667 | err = -EACCES; |
668 | goto out; | |
89f84243 | 669 | } |
e726340a | 670 | gss_msg = gss_setup_upcall(gss_auth, cred); |
79a3f20b BF |
671 | if (PTR_ERR(gss_msg) == -EAGAIN) { |
672 | err = wait_event_interruptible_timeout(pipe_version_waitqueue, | |
89f84243 | 673 | sn->pipe_version >= 0, 15 * HZ); |
2aed8b47 | 674 | if (sn->pipe_version < 0) { |
d1a8016a BS |
675 | warn_gssd(); |
676 | err = -EACCES; | |
677 | } | |
d36ccb9c | 678 | if (err < 0) |
79a3f20b | 679 | goto out; |
79a3f20b BF |
680 | goto retry; |
681 | } | |
1da177e4 LT |
682 | if (IS_ERR(gss_msg)) { |
683 | err = PTR_ERR(gss_msg); | |
684 | goto out; | |
685 | } | |
9beae467 | 686 | pipe = gss_msg->pipe; |
1da177e4 | 687 | for (;;) { |
5afa9133 | 688 | prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); |
9beae467 | 689 | spin_lock(&pipe->lock); |
1da177e4 | 690 | if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { |
1da177e4 LT |
691 | break; |
692 | } | |
9beae467 | 693 | spin_unlock(&pipe->lock); |
5afa9133 | 694 | if (fatal_signal_pending(current)) { |
1da177e4 LT |
695 | err = -ERESTARTSYS; |
696 | goto out_intr; | |
697 | } | |
698 | schedule(); | |
699 | } | |
74fb8fec CL |
700 | if (gss_msg->ctx) { |
701 | trace_rpcgss_ctx_init(gss_cred); | |
7b6962b0 | 702 | gss_cred_set_ctx(cred, gss_msg->ctx); |
74fb8fec | 703 | } else { |
1da177e4 | 704 | err = gss_msg->msg.errno; |
74fb8fec | 705 | } |
9beae467 | 706 | spin_unlock(&pipe->lock); |
1da177e4 LT |
707 | out_intr: |
708 | finish_wait(&gss_msg->waitqueue, &wait); | |
709 | gss_release_msg(gss_msg); | |
710 | out: | |
0c77668d CL |
711 | trace_rpcgss_upcall_result(from_kuid(&init_user_ns, |
712 | cred->cr_cred->fsuid), err); | |
1da177e4 LT |
713 | return err; |
714 | } | |
715 | ||
1da177e4 LT |
716 | #define MSG_BUF_MAXSIZE 1024 |
717 | ||
718 | static ssize_t | |
719 | gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) | |
720 | { | |
721 | const void *p, *end; | |
722 | void *buf; | |
1da177e4 | 723 | struct gss_upcall_msg *gss_msg; |
496ad9aa | 724 | struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; |
1da177e4 | 725 | struct gss_cl_ctx *ctx; |
90602c7b EB |
726 | uid_t id; |
727 | kuid_t uid; | |
3b68aaea | 728 | ssize_t err = -EFBIG; |
1da177e4 LT |
729 | |
730 | if (mlen > MSG_BUF_MAXSIZE) | |
731 | goto out; | |
732 | err = -ENOMEM; | |
0f38b873 | 733 | buf = kmalloc(mlen, GFP_NOFS); |
1da177e4 LT |
734 | if (!buf) |
735 | goto out; | |
736 | ||
1da177e4 LT |
737 | err = -EFAULT; |
738 | if (copy_from_user(buf, src, mlen)) | |
739 | goto err; | |
740 | ||
741 | end = (const void *)((char *)buf + mlen); | |
90602c7b | 742 | p = simple_get_bytes(buf, end, &id, sizeof(id)); |
1da177e4 LT |
743 | if (IS_ERR(p)) { |
744 | err = PTR_ERR(p); | |
745 | goto err; | |
746 | } | |
747 | ||
283ebe3e | 748 | uid = make_kuid(current_user_ns(), id); |
90602c7b EB |
749 | if (!uid_valid(uid)) { |
750 | err = -EINVAL; | |
751 | goto err; | |
752 | } | |
753 | ||
1da177e4 LT |
754 | err = -ENOMEM; |
755 | ctx = gss_alloc_context(); | |
756 | if (ctx == NULL) | |
757 | goto err; | |
3b68aaea TM |
758 | |
759 | err = -ENOENT; | |
760 | /* Find a matching upcall */ | |
9beae467 | 761 | spin_lock(&pipe->lock); |
9130b8db | 762 | gss_msg = __gss_find_upcall(pipe, uid, NULL); |
3b68aaea | 763 | if (gss_msg == NULL) { |
9beae467 | 764 | spin_unlock(&pipe->lock); |
3b68aaea TM |
765 | goto err_put_ctx; |
766 | } | |
767 | list_del_init(&gss_msg->list); | |
9beae467 | 768 | spin_unlock(&pipe->lock); |
3b68aaea | 769 | |
6e84c7b6 | 770 | p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); |
1da177e4 LT |
771 | if (IS_ERR(p)) { |
772 | err = PTR_ERR(p); | |
486bad2e JL |
773 | switch (err) { |
774 | case -EACCES: | |
dc5ddce9 | 775 | case -EKEYEXPIRED: |
486bad2e JL |
776 | gss_msg->msg.errno = err; |
777 | err = mlen; | |
778 | break; | |
779 | case -EFAULT: | |
780 | case -ENOMEM: | |
781 | case -EINVAL: | |
782 | case -ENOSYS: | |
783 | gss_msg->msg.errno = -EAGAIN; | |
784 | break; | |
785 | default: | |
786 | printk(KERN_CRIT "%s: bad return from " | |
6c853099 | 787 | "gss_fill_context: %zd\n", __func__, err); |
437b300c | 788 | gss_msg->msg.errno = -EIO; |
486bad2e | 789 | } |
3b68aaea | 790 | goto err_release_msg; |
1da177e4 | 791 | } |
3b68aaea TM |
792 | gss_msg->ctx = gss_get_ctx(ctx); |
793 | err = mlen; | |
794 | ||
795 | err_release_msg: | |
9beae467 | 796 | spin_lock(&pipe->lock); |
3b68aaea | 797 | __gss_unhash_msg(gss_msg); |
9beae467 | 798 | spin_unlock(&pipe->lock); |
3b68aaea | 799 | gss_release_msg(gss_msg); |
1da177e4 LT |
800 | err_put_ctx: |
801 | gss_put_ctx(ctx); | |
802 | err: | |
803 | kfree(buf); | |
804 | out: | |
1da177e4 LT |
805 | return err; |
806 | } | |
807 | ||
34769fc4 | 808 | static int gss_pipe_open(struct inode *inode, int new_version) |
cf81939d | 809 | { |
2aed8b47 TM |
810 | struct net *net = inode->i_sb->s_fs_info; |
811 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
34769fc4 BF |
812 | int ret = 0; |
813 | ||
79a3f20b | 814 | spin_lock(&pipe_version_lock); |
2aed8b47 | 815 | if (sn->pipe_version < 0) { |
34769fc4 | 816 | /* First open of any gss pipe determines the version: */ |
2aed8b47 | 817 | sn->pipe_version = new_version; |
79a3f20b BF |
818 | rpc_wake_up(&pipe_version_rpc_waitqueue); |
819 | wake_up(&pipe_version_waitqueue); | |
2aed8b47 | 820 | } else if (sn->pipe_version != new_version) { |
34769fc4 BF |
821 | /* Trying to open a pipe of a different version */ |
822 | ret = -EBUSY; | |
823 | goto out; | |
79a3f20b | 824 | } |
2aed8b47 | 825 | atomic_inc(&sn->pipe_users); |
34769fc4 | 826 | out: |
79a3f20b | 827 | spin_unlock(&pipe_version_lock); |
34769fc4 BF |
828 | return ret; |
829 | ||
830 | } | |
831 | ||
832 | static int gss_pipe_open_v0(struct inode *inode) | |
833 | { | |
834 | return gss_pipe_open(inode, 0); | |
835 | } | |
836 | ||
837 | static int gss_pipe_open_v1(struct inode *inode) | |
838 | { | |
839 | return gss_pipe_open(inode, 1); | |
cf81939d BF |
840 | } |
841 | ||
1da177e4 LT |
842 | static void |
843 | gss_pipe_release(struct inode *inode) | |
844 | { | |
2aed8b47 | 845 | struct net *net = inode->i_sb->s_fs_info; |
9beae467 | 846 | struct rpc_pipe *pipe = RPC_I(inode)->pipe; |
6e84c7b6 | 847 | struct gss_upcall_msg *gss_msg; |
1da177e4 | 848 | |
5a67657a | 849 | restart: |
9beae467 SK |
850 | spin_lock(&pipe->lock); |
851 | list_for_each_entry(gss_msg, &pipe->in_downcall, list) { | |
1da177e4 | 852 | |
5a67657a TM |
853 | if (!list_empty(&gss_msg->msg.list)) |
854 | continue; | |
1da177e4 | 855 | gss_msg->msg.errno = -EPIPE; |
7ff13969 | 856 | refcount_inc(&gss_msg->count); |
1da177e4 | 857 | __gss_unhash_msg(gss_msg); |
9beae467 | 858 | spin_unlock(&pipe->lock); |
1da177e4 | 859 | gss_release_msg(gss_msg); |
5a67657a | 860 | goto restart; |
1da177e4 | 861 | } |
9beae467 | 862 | spin_unlock(&pipe->lock); |
cf81939d | 863 | |
2aed8b47 | 864 | put_pipe_version(net); |
1da177e4 LT |
865 | } |
866 | ||
867 | static void | |
868 | gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) | |
869 | { | |
870 | struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); | |
1da177e4 LT |
871 | |
872 | if (msg->errno < 0) { | |
7ff13969 | 873 | refcount_inc(&gss_msg->count); |
1da177e4 | 874 | gss_unhash_msg(gss_msg); |
b03568c3 BF |
875 | if (msg->errno == -ETIMEDOUT) |
876 | warn_gssd(); | |
1da177e4 LT |
877 | gss_release_msg(gss_msg); |
878 | } | |
1cded9d2 | 879 | gss_release_msg(gss_msg); |
1da177e4 LT |
880 | } |
881 | ||
19172284 TM |
882 | static void gss_pipe_dentry_destroy(struct dentry *dir, |
883 | struct rpc_pipe_dir_object *pdo) | |
ccdc28f8 | 884 | { |
19172284 TM |
885 | struct gss_pipe *gss_pipe = pdo->pdo_data; |
886 | struct rpc_pipe *pipe = gss_pipe->pipe; | |
ccdc28f8 | 887 | |
19172284 TM |
888 | if (pipe->dentry != NULL) { |
889 | rpc_unlink(pipe->dentry); | |
890 | pipe->dentry = NULL; | |
6b2fddd3 | 891 | } |
ccdc28f8 SK |
892 | } |
893 | ||
19172284 TM |
894 | static int gss_pipe_dentry_create(struct dentry *dir, |
895 | struct rpc_pipe_dir_object *pdo) | |
ccdc28f8 | 896 | { |
19172284 | 897 | struct gss_pipe *p = pdo->pdo_data; |
6b2fddd3 | 898 | struct dentry *dentry; |
ccdc28f8 | 899 | |
19172284 TM |
900 | dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); |
901 | if (IS_ERR(dentry)) | |
902 | return PTR_ERR(dentry); | |
903 | p->pipe->dentry = dentry; | |
904 | return 0; | |
905 | } | |
906 | ||
907 | static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { | |
908 | .create = gss_pipe_dentry_create, | |
909 | .destroy = gss_pipe_dentry_destroy, | |
910 | }; | |
911 | ||
912 | static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, | |
913 | const char *name, | |
914 | const struct rpc_pipe_ops *upcall_ops) | |
915 | { | |
19172284 TM |
916 | struct gss_pipe *p; |
917 | int err = -ENOMEM; | |
ccdc28f8 | 918 | |
19172284 TM |
919 | p = kmalloc(sizeof(*p), GFP_KERNEL); |
920 | if (p == NULL) | |
6b2fddd3 | 921 | goto err; |
19172284 TM |
922 | p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); |
923 | if (IS_ERR(p->pipe)) { | |
924 | err = PTR_ERR(p->pipe); | |
925 | goto err_free_gss_pipe; | |
6b2fddd3 | 926 | } |
19172284 TM |
927 | p->name = name; |
928 | p->clnt = clnt; | |
414a6295 | 929 | kref_init(&p->kref); |
19172284 TM |
930 | rpc_init_pipe_dir_object(&p->pdo, |
931 | &gss_pipe_dir_object_ops, | |
932 | p); | |
414a6295 | 933 | return p; |
19172284 TM |
934 | err_free_gss_pipe: |
935 | kfree(p); | |
6b2fddd3 | 936 | err: |
19172284 | 937 | return ERR_PTR(err); |
ccdc28f8 SK |
938 | } |
939 | ||
414a6295 TM |
940 | struct gss_alloc_pdo { |
941 | struct rpc_clnt *clnt; | |
942 | const char *name; | |
943 | const struct rpc_pipe_ops *upcall_ops; | |
944 | }; | |
945 | ||
946 | static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) | |
947 | { | |
948 | struct gss_pipe *gss_pipe; | |
949 | struct gss_alloc_pdo *args = data; | |
950 | ||
951 | if (pdo->pdo_ops != &gss_pipe_dir_object_ops) | |
952 | return 0; | |
953 | gss_pipe = container_of(pdo, struct gss_pipe, pdo); | |
954 | if (strcmp(gss_pipe->name, args->name) != 0) | |
955 | return 0; | |
956 | if (!kref_get_unless_zero(&gss_pipe->kref)) | |
957 | return 0; | |
958 | return 1; | |
959 | } | |
960 | ||
961 | static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) | |
962 | { | |
963 | struct gss_pipe *gss_pipe; | |
964 | struct gss_alloc_pdo *args = data; | |
965 | ||
966 | gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); | |
967 | if (!IS_ERR(gss_pipe)) | |
968 | return &gss_pipe->pdo; | |
969 | return NULL; | |
970 | } | |
971 | ||
972 | static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, | |
973 | const char *name, | |
974 | const struct rpc_pipe_ops *upcall_ops) | |
975 | { | |
976 | struct net *net = rpc_net_ns(clnt); | |
977 | struct rpc_pipe_dir_object *pdo; | |
978 | struct gss_alloc_pdo args = { | |
979 | .clnt = clnt, | |
980 | .name = name, | |
981 | .upcall_ops = upcall_ops, | |
982 | }; | |
983 | ||
984 | pdo = rpc_find_or_alloc_pipe_dir_object(net, | |
985 | &clnt->cl_pipedir_objects, | |
986 | gss_pipe_match_pdo, | |
987 | gss_pipe_alloc_pdo, | |
988 | &args); | |
989 | if (pdo != NULL) | |
990 | return container_of(pdo, struct gss_pipe, pdo); | |
991 | return ERR_PTR(-ENOMEM); | |
992 | } | |
993 | ||
19172284 | 994 | static void __gss_pipe_free(struct gss_pipe *p) |
ccdc28f8 | 995 | { |
19172284 TM |
996 | struct rpc_clnt *clnt = p->clnt; |
997 | struct net *net = rpc_net_ns(clnt); | |
ccdc28f8 | 998 | |
19172284 TM |
999 | rpc_remove_pipe_dir_object(net, |
1000 | &clnt->cl_pipedir_objects, | |
1001 | &p->pdo); | |
1002 | rpc_destroy_pipe_data(p->pipe); | |
1003 | kfree(p); | |
ccdc28f8 SK |
1004 | } |
1005 | ||
414a6295 TM |
1006 | static void __gss_pipe_release(struct kref *kref) |
1007 | { | |
1008 | struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); | |
1009 | ||
1010 | __gss_pipe_free(p); | |
1011 | } | |
1012 | ||
19172284 | 1013 | static void gss_pipe_free(struct gss_pipe *p) |
ccdc28f8 | 1014 | { |
19172284 | 1015 | if (p != NULL) |
414a6295 | 1016 | kref_put(&p->kref, __gss_pipe_release); |
ccdc28f8 SK |
1017 | } |
1018 | ||
cca5172a YH |
1019 | /* |
1020 | * NOTE: we have the opportunity to use different | |
1da177e4 LT |
1021 | * parameters based on the input flavor (which must be a pseudoflavor) |
1022 | */ | |
eb6dc19d | 1023 | static struct gss_auth * |
82b98ca5 | 1024 | gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
1da177e4 | 1025 | { |
c2190661 | 1026 | rpc_authflavor_t flavor = args->pseudoflavor; |
1da177e4 | 1027 | struct gss_auth *gss_auth; |
19172284 | 1028 | struct gss_pipe *gss_pipe; |
1da177e4 | 1029 | struct rpc_auth * auth; |
6a19275a | 1030 | int err = -ENOMEM; /* XXX? */ |
1da177e4 | 1031 | |
1da177e4 | 1032 | if (!try_module_get(THIS_MODULE)) |
6a19275a | 1033 | return ERR_PTR(err); |
1da177e4 LT |
1034 | if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) |
1035 | goto out_dec; | |
eb6dc19d | 1036 | INIT_HLIST_NODE(&gss_auth->hash); |
bd4a3eb1 | 1037 | gss_auth->target_name = NULL; |
c2190661 TM |
1038 | if (args->target_name) { |
1039 | gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); | |
bd4a3eb1 TM |
1040 | if (gss_auth->target_name == NULL) |
1041 | goto err_free; | |
1042 | } | |
1da177e4 | 1043 | gss_auth->client = clnt; |
e726340a | 1044 | gss_auth->net = get_net(rpc_net_ns(clnt)); |
6a19275a | 1045 | err = -EINVAL; |
1da177e4 | 1046 | gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); |
0c77668d | 1047 | if (!gss_auth->mech) |
e726340a | 1048 | goto err_put_net; |
1da177e4 | 1049 | gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); |
438b6fde BF |
1050 | if (gss_auth->service == 0) |
1051 | goto err_put_mech; | |
a699d65e TM |
1052 | if (!gssd_running(gss_auth->net)) |
1053 | goto err_put_mech; | |
1da177e4 LT |
1054 | auth = &gss_auth->rpc_auth; |
1055 | auth->au_cslack = GSS_CRED_SLACK >> 2; | |
df513a77 | 1056 | auth->au_rslack = GSS_KRB5_MAX_SLACK_NEEDED >> 2; |
a00275ba | 1057 | auth->au_verfsize = GSS_VERF_SLACK >> 2; |
35e77d21 | 1058 | auth->au_ralign = GSS_VERF_SLACK >> 2; |
53bc19f1 | 1059 | __set_bit(RPCAUTH_AUTH_UPDATE_SLACK, &auth->au_flags); |
1da177e4 LT |
1060 | auth->au_ops = &authgss_ops; |
1061 | auth->au_flavor = flavor; | |
65b80179 | 1062 | if (gss_pseudoflavor_to_datatouch(gss_auth->mech, flavor)) |
53bc19f1 | 1063 | __set_bit(RPCAUTH_AUTH_DATATOUCH, &auth->au_flags); |
331bc71c | 1064 | refcount_set(&auth->au_count, 1); |
0285ed1f | 1065 | kref_init(&gss_auth->kref); |
1da177e4 | 1066 | |
19172284 TM |
1067 | err = rpcauth_init_credcache(auth); |
1068 | if (err) | |
1069 | goto err_put_mech; | |
34769fc4 BF |
1070 | /* |
1071 | * Note: if we created the old pipe first, then someone who | |
1072 | * examined the directory at the right moment might conclude | |
1073 | * that we supported only the old pipe. So we instead create | |
1074 | * the new pipe first. | |
1075 | */ | |
414a6295 | 1076 | gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); |
19172284 TM |
1077 | if (IS_ERR(gss_pipe)) { |
1078 | err = PTR_ERR(gss_pipe); | |
1079 | goto err_destroy_credcache; | |
6a19275a | 1080 | } |
19172284 | 1081 | gss_auth->gss_pipe[1] = gss_pipe; |
1da177e4 | 1082 | |
414a6295 | 1083 | gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, |
19172284 TM |
1084 | &gss_upcall_ops_v0); |
1085 | if (IS_ERR(gss_pipe)) { | |
1086 | err = PTR_ERR(gss_pipe); | |
c239d83b SK |
1087 | goto err_destroy_pipe_1; |
1088 | } | |
19172284 | 1089 | gss_auth->gss_pipe[0] = gss_pipe; |
07a2bf1d | 1090 | |
eb6dc19d | 1091 | return gss_auth; |
c239d83b | 1092 | err_destroy_pipe_1: |
414a6295 | 1093 | gss_pipe_free(gss_auth->gss_pipe[1]); |
19172284 TM |
1094 | err_destroy_credcache: |
1095 | rpcauth_destroy_credcache(auth); | |
1da177e4 LT |
1096 | err_put_mech: |
1097 | gss_mech_put(gss_auth->mech); | |
e726340a TM |
1098 | err_put_net: |
1099 | put_net(gss_auth->net); | |
1da177e4 | 1100 | err_free: |
bd4a3eb1 | 1101 | kfree(gss_auth->target_name); |
1da177e4 LT |
1102 | kfree(gss_auth); |
1103 | out_dec: | |
1104 | module_put(THIS_MODULE); | |
0c77668d | 1105 | trace_rpcgss_createauth(flavor, err); |
6a19275a | 1106 | return ERR_PTR(err); |
1da177e4 LT |
1107 | } |
1108 | ||
0285ed1f TM |
1109 | static void |
1110 | gss_free(struct gss_auth *gss_auth) | |
1111 | { | |
19172284 TM |
1112 | gss_pipe_free(gss_auth->gss_pipe[0]); |
1113 | gss_pipe_free(gss_auth->gss_pipe[1]); | |
0285ed1f | 1114 | gss_mech_put(gss_auth->mech); |
e726340a | 1115 | put_net(gss_auth->net); |
bd4a3eb1 | 1116 | kfree(gss_auth->target_name); |
0285ed1f TM |
1117 | |
1118 | kfree(gss_auth); | |
1119 | module_put(THIS_MODULE); | |
1120 | } | |
1121 | ||
1122 | static void | |
1123 | gss_free_callback(struct kref *kref) | |
1124 | { | |
1125 | struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); | |
1126 | ||
1127 | gss_free(gss_auth); | |
1128 | } | |
1129 | ||
9eb2ddb4 TM |
1130 | static void |
1131 | gss_put_auth(struct gss_auth *gss_auth) | |
1132 | { | |
1133 | kref_put(&gss_auth->kref, gss_free_callback); | |
1134 | } | |
1135 | ||
1da177e4 LT |
1136 | static void |
1137 | gss_destroy(struct rpc_auth *auth) | |
1138 | { | |
19172284 TM |
1139 | struct gss_auth *gss_auth = container_of(auth, |
1140 | struct gss_auth, rpc_auth); | |
1da177e4 | 1141 | |
eb6dc19d TM |
1142 | if (hash_hashed(&gss_auth->hash)) { |
1143 | spin_lock(&gss_auth_hash_lock); | |
1144 | hash_del(&gss_auth->hash); | |
1145 | spin_unlock(&gss_auth_hash_lock); | |
1146 | } | |
1147 | ||
19172284 TM |
1148 | gss_pipe_free(gss_auth->gss_pipe[0]); |
1149 | gss_auth->gss_pipe[0] = NULL; | |
1150 | gss_pipe_free(gss_auth->gss_pipe[1]); | |
1151 | gss_auth->gss_pipe[1] = NULL; | |
3ab9bb72 TM |
1152 | rpcauth_destroy_credcache(auth); |
1153 | ||
9eb2ddb4 | 1154 | gss_put_auth(gss_auth); |
1da177e4 LT |
1155 | } |
1156 | ||
a0f6ed8e BF |
1157 | /* |
1158 | * Auths may be shared between rpc clients that were cloned from a | |
1159 | * common client with the same xprt, if they also share the flavor and | |
1160 | * target_name. | |
1161 | * | |
1162 | * The auth is looked up from the oldest parent sharing the same | |
1163 | * cl_xprt, and the auth itself references only that common parent | |
1164 | * (which is guaranteed to last as long as any of its descendants). | |
1165 | */ | |
eb6dc19d | 1166 | static struct gss_auth * |
82b98ca5 | 1167 | gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args, |
eb6dc19d TM |
1168 | struct rpc_clnt *clnt, |
1169 | struct gss_auth *new) | |
1170 | { | |
1171 | struct gss_auth *gss_auth; | |
1172 | unsigned long hashval = (unsigned long)clnt; | |
1173 | ||
1174 | spin_lock(&gss_auth_hash_lock); | |
1175 | hash_for_each_possible(gss_auth_hash_table, | |
1176 | gss_auth, | |
1177 | hash, | |
1178 | hashval) { | |
a0f6ed8e BF |
1179 | if (gss_auth->client != clnt) |
1180 | continue; | |
eb6dc19d TM |
1181 | if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) |
1182 | continue; | |
1183 | if (gss_auth->target_name != args->target_name) { | |
1184 | if (gss_auth->target_name == NULL) | |
1185 | continue; | |
1186 | if (args->target_name == NULL) | |
1187 | continue; | |
1188 | if (strcmp(gss_auth->target_name, args->target_name)) | |
1189 | continue; | |
1190 | } | |
331bc71c | 1191 | if (!refcount_inc_not_zero(&gss_auth->rpc_auth.au_count)) |
eb6dc19d TM |
1192 | continue; |
1193 | goto out; | |
1194 | } | |
1195 | if (new) | |
1196 | hash_add(gss_auth_hash_table, &new->hash, hashval); | |
1197 | gss_auth = new; | |
1198 | out: | |
1199 | spin_unlock(&gss_auth_hash_lock); | |
1200 | return gss_auth; | |
1201 | } | |
1202 | ||
1203 | static struct gss_auth * | |
82b98ca5 SD |
1204 | gss_create_hashed(const struct rpc_auth_create_args *args, |
1205 | struct rpc_clnt *clnt) | |
eb6dc19d TM |
1206 | { |
1207 | struct gss_auth *gss_auth; | |
1208 | struct gss_auth *new; | |
1209 | ||
1210 | gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); | |
1211 | if (gss_auth != NULL) | |
1212 | goto out; | |
1213 | new = gss_create_new(args, clnt); | |
1214 | if (IS_ERR(new)) | |
1215 | return new; | |
1216 | gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); | |
1217 | if (gss_auth != new) | |
1218 | gss_destroy(&new->rpc_auth); | |
1219 | out: | |
1220 | return gss_auth; | |
1221 | } | |
1222 | ||
1223 | static struct rpc_auth * | |
82b98ca5 | 1224 | gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
eb6dc19d TM |
1225 | { |
1226 | struct gss_auth *gss_auth; | |
ad01b2c6 | 1227 | struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); |
eb6dc19d TM |
1228 | |
1229 | while (clnt != clnt->cl_parent) { | |
1230 | struct rpc_clnt *parent = clnt->cl_parent; | |
1231 | /* Find the original parent for this transport */ | |
ad01b2c6 | 1232 | if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps) |
eb6dc19d TM |
1233 | break; |
1234 | clnt = parent; | |
1235 | } | |
1236 | ||
1237 | gss_auth = gss_create_hashed(args, clnt); | |
1238 | if (IS_ERR(gss_auth)) | |
1239 | return ERR_CAST(gss_auth); | |
1240 | return &gss_auth->rpc_auth; | |
1241 | } | |
1242 | ||
a652a4bc TM |
1243 | static struct gss_cred * |
1244 | gss_dup_cred(struct gss_auth *gss_auth, struct gss_cred *gss_cred) | |
1245 | { | |
1246 | struct gss_cred *new; | |
1247 | ||
1248 | /* Make a copy of the cred so that we can reference count it */ | |
12a3ad61 | 1249 | new = kzalloc(sizeof(*gss_cred), GFP_NOFS); |
a652a4bc TM |
1250 | if (new) { |
1251 | struct auth_cred acred = { | |
8276c902 | 1252 | .cred = gss_cred->gc_base.cr_cred, |
a652a4bc TM |
1253 | }; |
1254 | struct gss_cl_ctx *ctx = | |
1255 | rcu_dereference_protected(gss_cred->gc_ctx, 1); | |
1256 | ||
1257 | rpcauth_init_cred(&new->gc_base, &acred, | |
1258 | &gss_auth->rpc_auth, | |
1259 | &gss_nullops); | |
1260 | new->gc_base.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE; | |
1261 | new->gc_service = gss_cred->gc_service; | |
1262 | new->gc_principal = gss_cred->gc_principal; | |
1263 | kref_get(&gss_auth->kref); | |
1264 | rcu_assign_pointer(new->gc_ctx, ctx); | |
1265 | gss_get_ctx(ctx); | |
1266 | } | |
1267 | return new; | |
1268 | } | |
1269 | ||
0df7fb74 | 1270 | /* |
a652a4bc | 1271 | * gss_send_destroy_context will cause the RPCSEC_GSS to send a NULL RPC call |
0df7fb74 TM |
1272 | * to the server with the GSS control procedure field set to |
1273 | * RPC_GSS_PROC_DESTROY. This should normally cause the server to release | |
1274 | * all RPCSEC_GSS state associated with that context. | |
1275 | */ | |
a652a4bc TM |
1276 | static void |
1277 | gss_send_destroy_context(struct rpc_cred *cred) | |
0df7fb74 TM |
1278 | { |
1279 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); | |
1280 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); | |
c5e6aecd | 1281 | struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); |
a652a4bc | 1282 | struct gss_cred *new; |
0df7fb74 TM |
1283 | struct rpc_task *task; |
1284 | ||
a652a4bc TM |
1285 | new = gss_dup_cred(gss_auth, gss_cred); |
1286 | if (new) { | |
1287 | ctx->gc_proc = RPC_GSS_PROC_DESTROY; | |
0df7fb74 | 1288 | |
74fb8fec | 1289 | trace_rpcgss_ctx_destroy(gss_cred); |
a652a4bc | 1290 | task = rpc_call_null(gss_auth->client, &new->gc_base, |
6fc3737a | 1291 | RPC_TASK_ASYNC); |
a652a4bc TM |
1292 | if (!IS_ERR(task)) |
1293 | rpc_put_task(task); | |
0df7fb74 | 1294 | |
a652a4bc TM |
1295 | put_rpccred(&new->gc_base); |
1296 | } | |
0df7fb74 TM |
1297 | } |
1298 | ||
1299 | /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure | |
1da177e4 LT |
1300 | * to create a new cred or context, so they check that things have been |
1301 | * allocated before freeing them. */ | |
1302 | static void | |
5d28dc82 | 1303 | gss_do_free_ctx(struct gss_cl_ctx *ctx) |
1da177e4 | 1304 | { |
0d8a3746 | 1305 | gss_delete_sec_context(&ctx->gc_gss_ctx); |
1da177e4 | 1306 | kfree(ctx->gc_wire_ctx.data); |
2004c726 | 1307 | kfree(ctx->gc_acceptor.data); |
1da177e4 LT |
1308 | kfree(ctx); |
1309 | } | |
1310 | ||
5d28dc82 TM |
1311 | static void |
1312 | gss_free_ctx_callback(struct rcu_head *head) | |
1313 | { | |
1314 | struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); | |
1315 | gss_do_free_ctx(ctx); | |
1316 | } | |
1317 | ||
1318 | static void | |
1319 | gss_free_ctx(struct gss_cl_ctx *ctx) | |
1320 | { | |
1321 | call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); | |
1322 | } | |
1323 | ||
1da177e4 | 1324 | static void |
31be5bf1 | 1325 | gss_free_cred(struct gss_cred *gss_cred) |
1da177e4 | 1326 | { |
31be5bf1 TM |
1327 | kfree(gss_cred); |
1328 | } | |
1da177e4 | 1329 | |
31be5bf1 TM |
1330 | static void |
1331 | gss_free_cred_callback(struct rcu_head *head) | |
1332 | { | |
1333 | struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); | |
1334 | gss_free_cred(gss_cred); | |
1335 | } | |
1da177e4 | 1336 | |
31be5bf1 | 1337 | static void |
6dcd3926 | 1338 | gss_destroy_nullcred(struct rpc_cred *cred) |
31be5bf1 | 1339 | { |
5d28dc82 | 1340 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
0285ed1f | 1341 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); |
c5e6aecd | 1342 | struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1); |
5d28dc82 | 1343 | |
a9b3cd7f | 1344 | RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); |
97f68c6b | 1345 | put_cred(cred->cr_cred); |
31be5bf1 | 1346 | call_rcu(&cred->cr_rcu, gss_free_cred_callback); |
5d28dc82 TM |
1347 | if (ctx) |
1348 | gss_put_ctx(ctx); | |
9eb2ddb4 | 1349 | gss_put_auth(gss_auth); |
1da177e4 LT |
1350 | } |
1351 | ||
6dcd3926 JL |
1352 | static void |
1353 | gss_destroy_cred(struct rpc_cred *cred) | |
1354 | { | |
a652a4bc TM |
1355 | if (test_and_clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) |
1356 | gss_send_destroy_context(cred); | |
6dcd3926 JL |
1357 | gss_destroy_nullcred(cred); |
1358 | } | |
1359 | ||
a960f8d6 FS |
1360 | static int |
1361 | gss_hash_cred(struct auth_cred *acred, unsigned int hashbits) | |
1362 | { | |
8276c902 | 1363 | return hash_64(from_kuid(&init_user_ns, acred->cred->fsuid), hashbits); |
a960f8d6 FS |
1364 | } |
1365 | ||
1da177e4 LT |
1366 | /* |
1367 | * Lookup RPCSEC_GSS cred for the current process | |
1368 | */ | |
1369 | static struct rpc_cred * | |
8a317760 | 1370 | gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
1da177e4 | 1371 | { |
3c6e0bc8 | 1372 | return rpcauth_lookup_credcache(auth, acred, flags, GFP_NOFS); |
1da177e4 LT |
1373 | } |
1374 | ||
1375 | static struct rpc_cred * | |
3c6e0bc8 | 1376 | gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags, gfp_t gfp) |
1da177e4 LT |
1377 | { |
1378 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); | |
1379 | struct gss_cred *cred = NULL; | |
1380 | int err = -ENOMEM; | |
1381 | ||
3c6e0bc8 | 1382 | if (!(cred = kzalloc(sizeof(*cred), gfp))) |
1da177e4 LT |
1383 | goto out_err; |
1384 | ||
5fe4755e | 1385 | rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); |
1da177e4 LT |
1386 | /* |
1387 | * Note: in order to force a call to call_refresh(), we deliberately | |
1388 | * fail to flag the credential as RPCAUTH_CRED_UPTODATE. | |
1389 | */ | |
fc432dd9 | 1390 | cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; |
1da177e4 | 1391 | cred->gc_service = gss_auth->service; |
1a80810f | 1392 | cred->gc_principal = acred->principal; |
0285ed1f | 1393 | kref_get(&gss_auth->kref); |
1da177e4 LT |
1394 | return &cred->gc_base; |
1395 | ||
1396 | out_err: | |
1da177e4 LT |
1397 | return ERR_PTR(err); |
1398 | } | |
1399 | ||
fba3bad4 TM |
1400 | static int |
1401 | gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) | |
1402 | { | |
1403 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); | |
1404 | struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); | |
1405 | int err; | |
1406 | ||
1407 | do { | |
1408 | err = gss_create_upcall(gss_auth, gss_cred); | |
1409 | } while (err == -EAGAIN); | |
1410 | return err; | |
1411 | } | |
1412 | ||
a0337d1d JL |
1413 | static char * |
1414 | gss_stringify_acceptor(struct rpc_cred *cred) | |
1415 | { | |
c5e6aecd | 1416 | char *string = NULL; |
a0337d1d | 1417 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
c5e6aecd | 1418 | struct gss_cl_ctx *ctx; |
b3ecba09 | 1419 | unsigned int len; |
c5e6aecd JL |
1420 | struct xdr_netobj *acceptor; |
1421 | ||
1422 | rcu_read_lock(); | |
1423 | ctx = rcu_dereference(gss_cred->gc_ctx); | |
1424 | if (!ctx) | |
1425 | goto out; | |
1426 | ||
b3ecba09 JL |
1427 | len = ctx->gc_acceptor.len; |
1428 | rcu_read_unlock(); | |
a0337d1d JL |
1429 | |
1430 | /* no point if there's no string */ | |
b3ecba09 JL |
1431 | if (!len) |
1432 | return NULL; | |
1433 | realloc: | |
1434 | string = kmalloc(len + 1, GFP_KERNEL); | |
a0337d1d | 1435 | if (!string) |
b3ecba09 JL |
1436 | return NULL; |
1437 | ||
1438 | rcu_read_lock(); | |
1439 | ctx = rcu_dereference(gss_cred->gc_ctx); | |
1440 | ||
1441 | /* did the ctx disappear or was it replaced by one with no acceptor? */ | |
1442 | if (!ctx || !ctx->gc_acceptor.len) { | |
1443 | kfree(string); | |
1444 | string = NULL; | |
c5e6aecd | 1445 | goto out; |
b3ecba09 JL |
1446 | } |
1447 | ||
1448 | acceptor = &ctx->gc_acceptor; | |
1449 | ||
1450 | /* | |
1451 | * Did we find a new acceptor that's longer than the original? Allocate | |
1452 | * a longer buffer and try again. | |
1453 | */ | |
1454 | if (len < acceptor->len) { | |
1455 | len = acceptor->len; | |
1456 | rcu_read_unlock(); | |
1457 | kfree(string); | |
1458 | goto realloc; | |
1459 | } | |
a0337d1d JL |
1460 | |
1461 | memcpy(string, acceptor->data, acceptor->len); | |
1462 | string[acceptor->len] = '\0'; | |
c5e6aecd JL |
1463 | out: |
1464 | rcu_read_unlock(); | |
a0337d1d JL |
1465 | return string; |
1466 | } | |
1467 | ||
4de6caa2 AA |
1468 | /* |
1469 | * Returns -EACCES if GSS context is NULL or will expire within the | |
1470 | * timeout (miliseconds) | |
1471 | */ | |
1472 | static int | |
1473 | gss_key_timeout(struct rpc_cred *rc) | |
1474 | { | |
1475 | struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); | |
c5e6aecd | 1476 | struct gss_cl_ctx *ctx; |
cc6a7aab AB |
1477 | unsigned long timeout = jiffies + (gss_key_expire_timeo * HZ); |
1478 | int ret = 0; | |
4de6caa2 | 1479 | |
c5e6aecd JL |
1480 | rcu_read_lock(); |
1481 | ctx = rcu_dereference(gss_cred->gc_ctx); | |
cc6a7aab AB |
1482 | if (!ctx || time_after(timeout, ctx->gc_expiry)) |
1483 | ret = -EACCES; | |
c5e6aecd | 1484 | rcu_read_unlock(); |
cc6a7aab AB |
1485 | |
1486 | return ret; | |
4de6caa2 AA |
1487 | } |
1488 | ||
1da177e4 | 1489 | static int |
8a317760 | 1490 | gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) |
1da177e4 LT |
1491 | { |
1492 | struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); | |
c5e6aecd | 1493 | struct gss_cl_ctx *ctx; |
4de6caa2 | 1494 | int ret; |
1da177e4 | 1495 | |
cd019f75 | 1496 | if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) |
8a317760 | 1497 | goto out; |
1da177e4 | 1498 | /* Don't match with creds that have expired. */ |
c5e6aecd JL |
1499 | rcu_read_lock(); |
1500 | ctx = rcu_dereference(gss_cred->gc_ctx); | |
1501 | if (!ctx || time_after(jiffies, ctx->gc_expiry)) { | |
1502 | rcu_read_unlock(); | |
cd019f75 | 1503 | return 0; |
c5e6aecd JL |
1504 | } |
1505 | rcu_read_unlock(); | |
cd019f75 | 1506 | if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) |
1da177e4 | 1507 | return 0; |
8a317760 | 1508 | out: |
68c97153 TM |
1509 | if (acred->principal != NULL) { |
1510 | if (gss_cred->gc_principal == NULL) | |
1511 | return 0; | |
4de6caa2 | 1512 | ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; |
ddf529ee N |
1513 | } else { |
1514 | if (gss_cred->gc_principal != NULL) | |
1515 | return 0; | |
04d1532b | 1516 | ret = uid_eq(rc->cr_cred->fsuid, acred->cred->fsuid); |
4de6caa2 AA |
1517 | } |
1518 | return ret; | |
1da177e4 LT |
1519 | } |
1520 | ||
1521 | /* | |
e8680a24 CL |
1522 | * Marshal credentials. |
1523 | * | |
1524 | * The expensive part is computing the verifier. We can't cache a | |
1525 | * pre-computed version of the verifier because the seqno, which | |
1526 | * is different every time, is included in the MIC. | |
1527 | */ | |
1528 | static int gss_marshal(struct rpc_task *task, struct xdr_stream *xdr) | |
1da177e4 | 1529 | { |
a17c2153 TM |
1530 | struct rpc_rqst *req = task->tk_rqstp; |
1531 | struct rpc_cred *cred = req->rq_cred; | |
1da177e4 LT |
1532 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
1533 | gc_base); | |
1534 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
e8680a24 | 1535 | __be32 *p, *cred_len; |
1da177e4 LT |
1536 | u32 maj_stat = 0; |
1537 | struct xdr_netobj mic; | |
1538 | struct kvec iov; | |
1539 | struct xdr_buf verf_buf; | |
0c77668d | 1540 | int status; |
1da177e4 | 1541 | |
e8680a24 CL |
1542 | /* Credential */ |
1543 | ||
1544 | p = xdr_reserve_space(xdr, 7 * sizeof(*p) + | |
1545 | ctx->gc_wire_ctx.len); | |
1546 | if (!p) | |
0c77668d | 1547 | goto marshal_failed; |
e8680a24 | 1548 | *p++ = rpc_auth_gss; |
1da177e4 LT |
1549 | cred_len = p++; |
1550 | ||
1551 | spin_lock(&ctx->gc_seq_lock); | |
97b78ae9 | 1552 | req->rq_seqno = (ctx->gc_seq < MAXSEQ) ? ctx->gc_seq++ : MAXSEQ; |
1da177e4 | 1553 | spin_unlock(&ctx->gc_seq_lock); |
97b78ae9 | 1554 | if (req->rq_seqno == MAXSEQ) |
0c77668d CL |
1555 | goto expired; |
1556 | trace_rpcgss_seqno(task); | |
1da177e4 | 1557 | |
e8680a24 CL |
1558 | *p++ = cpu_to_be32(RPC_GSS_VERSION); |
1559 | *p++ = cpu_to_be32(ctx->gc_proc); | |
1560 | *p++ = cpu_to_be32(req->rq_seqno); | |
1561 | *p++ = cpu_to_be32(gss_cred->gc_service); | |
1da177e4 | 1562 | p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); |
e8680a24 CL |
1563 | *cred_len = cpu_to_be32((p - (cred_len + 1)) << 2); |
1564 | ||
1565 | /* Verifier */ | |
1da177e4 LT |
1566 | |
1567 | /* We compute the checksum for the verifier over the xdr-encoded bytes | |
1568 | * starting with the xid and ending at the end of the credential: */ | |
067fb11b | 1569 | iov.iov_base = req->rq_snd_buf.head[0].iov_base; |
1da177e4 LT |
1570 | iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; |
1571 | xdr_buf_from_iov(&iov, &verf_buf); | |
1572 | ||
e8680a24 CL |
1573 | p = xdr_reserve_space(xdr, sizeof(*p)); |
1574 | if (!p) | |
0c77668d | 1575 | goto marshal_failed; |
e8680a24 | 1576 | *p++ = rpc_auth_gss; |
1da177e4 | 1577 | mic.data = (u8 *)(p + 1); |
00fd6e14 | 1578 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
e8680a24 | 1579 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
0c77668d | 1580 | goto expired; |
e8680a24 | 1581 | else if (maj_stat != 0) |
0c77668d | 1582 | goto bad_mic; |
e8680a24 | 1583 | if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) |
0c77668d CL |
1584 | goto marshal_failed; |
1585 | status = 0; | |
1586 | out: | |
e8680a24 | 1587 | gss_put_ctx(ctx); |
0c77668d CL |
1588 | return status; |
1589 | expired: | |
97b78ae9 | 1590 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
0c77668d CL |
1591 | status = -EKEYEXPIRED; |
1592 | goto out; | |
1593 | marshal_failed: | |
1594 | status = -EMSGSIZE; | |
1595 | goto out; | |
1596 | bad_mic: | |
1597 | trace_rpcgss_get_mic(task, maj_stat); | |
1598 | status = -EIO; | |
1599 | goto out; | |
1da177e4 LT |
1600 | } |
1601 | ||
cd019f75 TM |
1602 | static int gss_renew_cred(struct rpc_task *task) |
1603 | { | |
a17c2153 | 1604 | struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; |
cd019f75 TM |
1605 | struct gss_cred *gss_cred = container_of(oldcred, |
1606 | struct gss_cred, | |
1607 | gc_base); | |
1608 | struct rpc_auth *auth = oldcred->cr_auth; | |
1609 | struct auth_cred acred = { | |
97f68c6b | 1610 | .cred = oldcred->cr_cred, |
68c97153 | 1611 | .principal = gss_cred->gc_principal, |
cd019f75 TM |
1612 | }; |
1613 | struct rpc_cred *new; | |
1614 | ||
1615 | new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); | |
1616 | if (IS_ERR(new)) | |
1617 | return PTR_ERR(new); | |
53bc19f1 | 1618 | |
a17c2153 | 1619 | task->tk_rqstp->rq_cred = new; |
cd019f75 TM |
1620 | put_rpccred(oldcred); |
1621 | return 0; | |
1622 | } | |
1623 | ||
126e216a TM |
1624 | static int gss_cred_is_negative_entry(struct rpc_cred *cred) |
1625 | { | |
1626 | if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { | |
1627 | unsigned long now = jiffies; | |
1628 | unsigned long begin, expire; | |
8fdee4cc | 1629 | struct gss_cred *gss_cred; |
126e216a TM |
1630 | |
1631 | gss_cred = container_of(cred, struct gss_cred, gc_base); | |
1632 | begin = gss_cred->gc_upcall_timestamp; | |
1633 | expire = begin + gss_expired_cred_retry_delay * HZ; | |
1634 | ||
1635 | if (time_in_range_open(now, begin, expire)) | |
1636 | return 1; | |
1637 | } | |
1638 | return 0; | |
1639 | } | |
1640 | ||
1da177e4 LT |
1641 | /* |
1642 | * Refresh credentials. XXX - finish | |
1643 | */ | |
1644 | static int | |
1645 | gss_refresh(struct rpc_task *task) | |
1646 | { | |
a17c2153 | 1647 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
cd019f75 TM |
1648 | int ret = 0; |
1649 | ||
126e216a TM |
1650 | if (gss_cred_is_negative_entry(cred)) |
1651 | return -EKEYEXPIRED; | |
1652 | ||
cd019f75 TM |
1653 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && |
1654 | !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { | |
1655 | ret = gss_renew_cred(task); | |
1656 | if (ret < 0) | |
1657 | goto out; | |
a17c2153 | 1658 | cred = task->tk_rqstp->rq_cred; |
cd019f75 | 1659 | } |
1da177e4 | 1660 | |
cd019f75 TM |
1661 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
1662 | ret = gss_refresh_upcall(task); | |
1663 | out: | |
1664 | return ret; | |
1da177e4 LT |
1665 | } |
1666 | ||
0df7fb74 TM |
1667 | /* Dummy refresh routine: used only when destroying the context */ |
1668 | static int | |
1669 | gss_refresh_null(struct rpc_task *task) | |
1670 | { | |
c297c8b9 | 1671 | return 0; |
0df7fb74 TM |
1672 | } |
1673 | ||
a0584ee9 CL |
1674 | static int |
1675 | gss_validate(struct rpc_task *task, struct xdr_stream *xdr) | |
1da177e4 | 1676 | { |
a17c2153 | 1677 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
1da177e4 | 1678 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); |
a0584ee9 | 1679 | __be32 *p, *seq = NULL; |
1da177e4 LT |
1680 | struct kvec iov; |
1681 | struct xdr_buf verf_buf; | |
1682 | struct xdr_netobj mic; | |
a0584ee9 CL |
1683 | u32 len, maj_stat; |
1684 | int status; | |
1da177e4 | 1685 | |
a0584ee9 CL |
1686 | p = xdr_inline_decode(xdr, 2 * sizeof(*p)); |
1687 | if (!p) | |
1688 | goto validate_failed; | |
1689 | if (*p++ != rpc_auth_gss) | |
1690 | goto validate_failed; | |
1691 | len = be32_to_cpup(p); | |
1692 | if (len > RPC_MAX_AUTH_SIZE) | |
1693 | goto validate_failed; | |
1694 | p = xdr_inline_decode(xdr, len); | |
1695 | if (!p) | |
1696 | goto validate_failed; | |
1da177e4 | 1697 | |
2876a344 BF |
1698 | seq = kmalloc(4, GFP_NOFS); |
1699 | if (!seq) | |
a0584ee9 CL |
1700 | goto validate_failed; |
1701 | *seq = cpu_to_be32(task->tk_rqstp->rq_seqno); | |
2876a344 BF |
1702 | iov.iov_base = seq; |
1703 | iov.iov_len = 4; | |
1da177e4 LT |
1704 | xdr_buf_from_iov(&iov, &verf_buf); |
1705 | mic.data = (u8 *)p; | |
1706 | mic.len = len; | |
00fd6e14 | 1707 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
1da177e4 | 1708 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1709 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
a0584ee9 CL |
1710 | if (maj_stat) |
1711 | goto bad_mic; | |
1712 | ||
24b2605b BF |
1713 | /* We leave it to unwrap to calculate au_rslack. For now we just |
1714 | * calculate the length of the verifier: */ | |
53bc19f1 CL |
1715 | if (test_bit(RPCAUTH_AUTH_UPDATE_SLACK, &cred->cr_auth->au_flags)) |
1716 | cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; | |
a0584ee9 CL |
1717 | status = 0; |
1718 | out: | |
1da177e4 | 1719 | gss_put_ctx(ctx); |
2876a344 | 1720 | kfree(seq); |
a0584ee9 CL |
1721 | return status; |
1722 | ||
1723 | validate_failed: | |
1724 | status = -EIO; | |
1725 | goto out; | |
1726 | bad_mic: | |
0c77668d | 1727 | trace_rpcgss_verify_mic(task, maj_stat); |
a0584ee9 CL |
1728 | status = -EACCES; |
1729 | goto out; | |
1da177e4 LT |
1730 | } |
1731 | ||
d162372a CL |
1732 | static noinline_for_stack int |
1733 | gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
1734 | struct rpc_task *task, struct xdr_stream *xdr) | |
1da177e4 | 1735 | { |
e8680a24 CL |
1736 | struct rpc_rqst *rqstp = task->tk_rqstp; |
1737 | struct xdr_buf integ_buf, *snd_buf = &rqstp->rq_snd_buf; | |
1da177e4 | 1738 | struct xdr_netobj mic; |
e8680a24 CL |
1739 | __be32 *p, *integ_len; |
1740 | u32 offset, maj_stat; | |
1da177e4 | 1741 | |
e8680a24 CL |
1742 | p = xdr_reserve_space(xdr, 2 * sizeof(*p)); |
1743 | if (!p) | |
1744 | goto wrap_failed; | |
1da177e4 | 1745 | integ_len = p++; |
e8680a24 | 1746 | *p = cpu_to_be32(rqstp->rq_seqno); |
1da177e4 | 1747 | |
e8680a24 CL |
1748 | if (rpcauth_wrap_req_encode(task, xdr)) |
1749 | goto wrap_failed; | |
1da177e4 | 1750 | |
e8680a24 | 1751 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; |
1da177e4 LT |
1752 | if (xdr_buf_subsegment(snd_buf, &integ_buf, |
1753 | offset, snd_buf->len - offset)) | |
e8680a24 CL |
1754 | goto wrap_failed; |
1755 | *integ_len = cpu_to_be32(integ_buf.len); | |
1da177e4 | 1756 | |
e8680a24 CL |
1757 | p = xdr_reserve_space(xdr, 0); |
1758 | if (!p) | |
1759 | goto wrap_failed; | |
1da177e4 | 1760 | mic.data = (u8 *)(p + 1); |
00fd6e14 | 1761 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); |
1da177e4 | 1762 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 1763 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 | 1764 | else if (maj_stat) |
0c77668d | 1765 | goto bad_mic; |
e8680a24 CL |
1766 | /* Check that the trailing MIC fit in the buffer, after the fact */ |
1767 | if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0) | |
1768 | goto wrap_failed; | |
1da177e4 | 1769 | return 0; |
e8680a24 CL |
1770 | wrap_failed: |
1771 | return -EMSGSIZE; | |
0c77668d CL |
1772 | bad_mic: |
1773 | trace_rpcgss_get_mic(task, maj_stat); | |
1774 | return -EIO; | |
1da177e4 LT |
1775 | } |
1776 | ||
2d2da60c BF |
1777 | static void |
1778 | priv_release_snd_buf(struct rpc_rqst *rqstp) | |
1779 | { | |
1780 | int i; | |
1781 | ||
1782 | for (i=0; i < rqstp->rq_enc_pages_num; i++) | |
1783 | __free_page(rqstp->rq_enc_pages[i]); | |
1784 | kfree(rqstp->rq_enc_pages); | |
8dae5398 | 1785 | rqstp->rq_release_snd_buf = NULL; |
2d2da60c BF |
1786 | } |
1787 | ||
1788 | static int | |
1789 | alloc_enc_pages(struct rpc_rqst *rqstp) | |
1790 | { | |
1791 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; | |
1792 | int first, last, i; | |
1793 | ||
8dae5398 CL |
1794 | if (rqstp->rq_release_snd_buf) |
1795 | rqstp->rq_release_snd_buf(rqstp); | |
1796 | ||
2d2da60c BF |
1797 | if (snd_buf->page_len == 0) { |
1798 | rqstp->rq_enc_pages_num = 0; | |
1799 | return 0; | |
1800 | } | |
1801 | ||
09cbfeaf KS |
1802 | first = snd_buf->page_base >> PAGE_SHIFT; |
1803 | last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_SHIFT; | |
2d2da60c BF |
1804 | rqstp->rq_enc_pages_num = last - first + 1 + 1; |
1805 | rqstp->rq_enc_pages | |
6da2ec56 KC |
1806 | = kmalloc_array(rqstp->rq_enc_pages_num, |
1807 | sizeof(struct page *), | |
2d2da60c BF |
1808 | GFP_NOFS); |
1809 | if (!rqstp->rq_enc_pages) | |
1810 | goto out; | |
1811 | for (i=0; i < rqstp->rq_enc_pages_num; i++) { | |
1812 | rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); | |
1813 | if (rqstp->rq_enc_pages[i] == NULL) | |
1814 | goto out_free; | |
1815 | } | |
1816 | rqstp->rq_release_snd_buf = priv_release_snd_buf; | |
1817 | return 0; | |
1818 | out_free: | |
cdead7cf TM |
1819 | rqstp->rq_enc_pages_num = i; |
1820 | priv_release_snd_buf(rqstp); | |
2d2da60c BF |
1821 | out: |
1822 | return -EAGAIN; | |
1823 | } | |
1824 | ||
d162372a CL |
1825 | static noinline_for_stack int |
1826 | gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, | |
1827 | struct rpc_task *task, struct xdr_stream *xdr) | |
2d2da60c | 1828 | { |
e8680a24 | 1829 | struct rpc_rqst *rqstp = task->tk_rqstp; |
2d2da60c | 1830 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; |
e8680a24 | 1831 | u32 pad, offset, maj_stat; |
2d2da60c | 1832 | int status; |
e8680a24 | 1833 | __be32 *p, *opaque_len; |
2d2da60c BF |
1834 | struct page **inpages; |
1835 | int first; | |
2d2da60c | 1836 | struct kvec *iov; |
2d2da60c | 1837 | |
e8680a24 CL |
1838 | status = -EIO; |
1839 | p = xdr_reserve_space(xdr, 2 * sizeof(*p)); | |
1840 | if (!p) | |
1841 | goto wrap_failed; | |
2d2da60c | 1842 | opaque_len = p++; |
e8680a24 | 1843 | *p = cpu_to_be32(rqstp->rq_seqno); |
2d2da60c | 1844 | |
e8680a24 CL |
1845 | if (rpcauth_wrap_req_encode(task, xdr)) |
1846 | goto wrap_failed; | |
2d2da60c BF |
1847 | |
1848 | status = alloc_enc_pages(rqstp); | |
e8680a24 CL |
1849 | if (unlikely(status)) |
1850 | goto wrap_failed; | |
09cbfeaf | 1851 | first = snd_buf->page_base >> PAGE_SHIFT; |
2d2da60c BF |
1852 | inpages = snd_buf->pages + first; |
1853 | snd_buf->pages = rqstp->rq_enc_pages; | |
09cbfeaf | 1854 | snd_buf->page_base -= first << PAGE_SHIFT; |
7561042f | 1855 | /* |
e8680a24 CL |
1856 | * Move the tail into its own page, in case gss_wrap needs |
1857 | * more space in the head when wrapping. | |
7561042f | 1858 | * |
e8680a24 | 1859 | * Still... Why can't gss_wrap just slide the tail down? |
7561042f | 1860 | */ |
2d2da60c | 1861 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) { |
e8680a24 CL |
1862 | char *tmp; |
1863 | ||
2d2da60c BF |
1864 | tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); |
1865 | memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); | |
1866 | snd_buf->tail[0].iov_base = tmp; | |
1867 | } | |
e8680a24 | 1868 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; |
00fd6e14 | 1869 | maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); |
7561042f | 1870 | /* slack space should prevent this ever happening: */ |
e8680a24 CL |
1871 | if (unlikely(snd_buf->len > snd_buf->buflen)) |
1872 | goto wrap_failed; | |
2d2da60c BF |
1873 | /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was |
1874 | * done anyway, so it's safe to put the request on the wire: */ | |
1875 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) | |
fc432dd9 | 1876 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
2d2da60c | 1877 | else if (maj_stat) |
0c77668d | 1878 | goto bad_wrap; |
2d2da60c | 1879 | |
e8680a24 CL |
1880 | *opaque_len = cpu_to_be32(snd_buf->len - offset); |
1881 | /* guess whether the pad goes into the head or the tail: */ | |
2d2da60c BF |
1882 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) |
1883 | iov = snd_buf->tail; | |
1884 | else | |
1885 | iov = snd_buf->head; | |
1886 | p = iov->iov_base + iov->iov_len; | |
96f194b7 | 1887 | pad = xdr_pad_size(snd_buf->len - offset); |
2d2da60c BF |
1888 | memset(p, 0, pad); |
1889 | iov->iov_len += pad; | |
1890 | snd_buf->len += pad; | |
1891 | ||
1892 | return 0; | |
e8680a24 CL |
1893 | wrap_failed: |
1894 | return status; | |
0c77668d CL |
1895 | bad_wrap: |
1896 | trace_rpcgss_wrap(task, maj_stat); | |
1897 | return -EIO; | |
2d2da60c BF |
1898 | } |
1899 | ||
e8680a24 | 1900 | static int gss_wrap_req(struct rpc_task *task, struct xdr_stream *xdr) |
1da177e4 | 1901 | { |
a17c2153 | 1902 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
1da177e4 LT |
1903 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
1904 | gc_base); | |
1905 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
e8680a24 | 1906 | int status; |
1da177e4 | 1907 | |
e8680a24 | 1908 | status = -EIO; |
1da177e4 LT |
1909 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) { |
1910 | /* The spec seems a little ambiguous here, but I think that not | |
1911 | * wrapping context destruction requests makes the most sense. | |
1912 | */ | |
e8680a24 | 1913 | status = rpcauth_wrap_req_encode(task, xdr); |
1da177e4 LT |
1914 | goto out; |
1915 | } | |
1916 | switch (gss_cred->gc_service) { | |
89f0e4fe | 1917 | case RPC_GSS_SVC_NONE: |
e8680a24 | 1918 | status = rpcauth_wrap_req_encode(task, xdr); |
89f0e4fe JP |
1919 | break; |
1920 | case RPC_GSS_SVC_INTEGRITY: | |
e8680a24 | 1921 | status = gss_wrap_req_integ(cred, ctx, task, xdr); |
89f0e4fe JP |
1922 | break; |
1923 | case RPC_GSS_SVC_PRIVACY: | |
e8680a24 | 1924 | status = gss_wrap_req_priv(cred, ctx, task, xdr); |
89f0e4fe | 1925 | break; |
0c77668d CL |
1926 | default: |
1927 | status = -EIO; | |
1da177e4 LT |
1928 | } |
1929 | out: | |
1930 | gss_put_ctx(ctx); | |
1da177e4 LT |
1931 | return status; |
1932 | } | |
1933 | ||
53bc19f1 CL |
1934 | /** |
1935 | * gss_update_rslack - Possibly update RPC receive buffer size estimates | |
1936 | * @task: rpc_task for incoming RPC Reply being unwrapped | |
1937 | * @cred: controlling rpc_cred for @task | |
1938 | * @before: XDR words needed before each RPC Reply message | |
1939 | * @after: XDR words needed following each RPC Reply message | |
1940 | * | |
1941 | */ | |
1942 | static void gss_update_rslack(struct rpc_task *task, struct rpc_cred *cred, | |
1943 | unsigned int before, unsigned int after) | |
a0584ee9 | 1944 | { |
35e77d21 CL |
1945 | struct rpc_auth *auth = cred->cr_auth; |
1946 | ||
53bc19f1 CL |
1947 | if (test_and_clear_bit(RPCAUTH_AUTH_UPDATE_SLACK, &auth->au_flags)) { |
1948 | auth->au_ralign = auth->au_verfsize + before; | |
1949 | auth->au_rslack = auth->au_verfsize + after; | |
1950 | trace_rpcgss_update_slack(task, auth); | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | static int | |
1955 | gss_unwrap_resp_auth(struct rpc_task *task, struct rpc_cred *cred) | |
1956 | { | |
1957 | gss_update_rslack(task, cred, 0, 0); | |
a0584ee9 CL |
1958 | return 0; |
1959 | } | |
1960 | ||
4047aa90 CL |
1961 | /* |
1962 | * RFC 2203, Section 5.3.2.2 | |
1963 | * | |
1964 | * struct rpc_gss_integ_data { | |
1965 | * opaque databody_integ<>; | |
1966 | * opaque checksum<>; | |
1967 | * }; | |
1968 | * | |
1969 | * struct rpc_gss_data_t { | |
1970 | * unsigned int seq_num; | |
1971 | * proc_req_arg_t arg; | |
1972 | * }; | |
1973 | */ | |
d162372a | 1974 | static noinline_for_stack int |
0c77668d CL |
1975 | gss_unwrap_resp_integ(struct rpc_task *task, struct rpc_cred *cred, |
1976 | struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, | |
1977 | struct xdr_stream *xdr) | |
1da177e4 | 1978 | { |
4047aa90 | 1979 | struct xdr_buf gss_data, *rcv_buf = &rqstp->rq_rcv_buf; |
4047aa90 | 1980 | u32 len, offset, seqno, maj_stat; |
1da177e4 | 1981 | struct xdr_netobj mic; |
4047aa90 | 1982 | int ret; |
1da177e4 | 1983 | |
4047aa90 CL |
1984 | ret = -EIO; |
1985 | mic.data = NULL; | |
1986 | ||
1987 | /* opaque databody_integ<>; */ | |
1988 | if (xdr_stream_decode_u32(xdr, &len)) | |
a0584ee9 | 1989 | goto unwrap_failed; |
4047aa90 | 1990 | if (len & 3) |
a0584ee9 | 1991 | goto unwrap_failed; |
4047aa90 CL |
1992 | offset = rcv_buf->len - xdr_stream_remaining(xdr); |
1993 | if (xdr_stream_decode_u32(xdr, &seqno)) | |
a0584ee9 | 1994 | goto unwrap_failed; |
4047aa90 | 1995 | if (seqno != rqstp->rq_seqno) |
0c77668d | 1996 | goto bad_seqno; |
4047aa90 CL |
1997 | if (xdr_buf_subsegment(rcv_buf, &gss_data, offset, len)) |
1998 | goto unwrap_failed; | |
1da177e4 | 1999 | |
4047aa90 CL |
2000 | /* |
2001 | * The xdr_stream now points to the beginning of the | |
2002 | * upper layer payload, to be passed below to | |
2003 | * rpcauth_unwrap_resp_decode(). The checksum, which | |
2004 | * follows the upper layer payload in @rcv_buf, is | |
2005 | * located and parsed without updating the xdr_stream. | |
2006 | */ | |
1da177e4 | 2007 | |
4047aa90 CL |
2008 | /* opaque checksum<>; */ |
2009 | offset += len; | |
2010 | if (xdr_decode_word(rcv_buf, offset, &len)) | |
2011 | goto unwrap_failed; | |
2012 | offset += sizeof(__be32); | |
2013 | if (offset + len > rcv_buf->len) | |
2014 | goto unwrap_failed; | |
2015 | mic.len = len; | |
2016 | mic.data = kmalloc(len, GFP_NOFS); | |
2017 | if (!mic.data) | |
a0584ee9 | 2018 | goto unwrap_failed; |
4047aa90 | 2019 | if (read_bytes_from_xdr_buf(rcv_buf, offset, mic.data, mic.len)) |
a0584ee9 | 2020 | goto unwrap_failed; |
4047aa90 CL |
2021 | |
2022 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &gss_data, &mic); | |
1da177e4 | 2023 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 2024 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
1da177e4 | 2025 | if (maj_stat != GSS_S_COMPLETE) |
a0584ee9 CL |
2026 | goto bad_mic; |
2027 | ||
53bc19f1 | 2028 | gss_update_rslack(task, cred, 2, 2 + 1 + XDR_QUADLEN(mic.len)); |
4047aa90 CL |
2029 | ret = 0; |
2030 | ||
2031 | out: | |
2032 | kfree(mic.data); | |
2033 | return ret; | |
2034 | ||
a0584ee9 | 2035 | unwrap_failed: |
0c77668d | 2036 | trace_rpcgss_unwrap_failed(task); |
4047aa90 | 2037 | goto out; |
0c77668d | 2038 | bad_seqno: |
4047aa90 CL |
2039 | trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, seqno); |
2040 | goto out; | |
a0584ee9 | 2041 | bad_mic: |
0c77668d | 2042 | trace_rpcgss_verify_mic(task, maj_stat); |
4047aa90 | 2043 | goto out; |
1da177e4 LT |
2044 | } |
2045 | ||
d162372a | 2046 | static noinline_for_stack int |
0c77668d CL |
2047 | gss_unwrap_resp_priv(struct rpc_task *task, struct rpc_cred *cred, |
2048 | struct gss_cl_ctx *ctx, struct rpc_rqst *rqstp, | |
2049 | struct xdr_stream *xdr) | |
a0584ee9 CL |
2050 | { |
2051 | struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; | |
2052 | struct kvec *head = rqstp->rq_rcv_buf.head; | |
a0584ee9 CL |
2053 | u32 offset, opaque_len, maj_stat; |
2054 | __be32 *p; | |
2055 | ||
2056 | p = xdr_inline_decode(xdr, 2 * sizeof(*p)); | |
2057 | if (unlikely(!p)) | |
2058 | goto unwrap_failed; | |
2059 | opaque_len = be32_to_cpup(p++); | |
2060 | offset = (u8 *)(p) - (u8 *)head->iov_base; | |
2d2da60c | 2061 | if (offset + opaque_len > rcv_buf->len) |
a0584ee9 | 2062 | goto unwrap_failed; |
2d2da60c | 2063 | |
31c9590a CL |
2064 | maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, |
2065 | offset + opaque_len, rcv_buf); | |
2d2da60c | 2066 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
fc432dd9 | 2067 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
2d2da60c | 2068 | if (maj_stat != GSS_S_COMPLETE) |
a0584ee9 CL |
2069 | goto bad_unwrap; |
2070 | /* gss_unwrap decrypted the sequence number */ | |
2071 | if (be32_to_cpup(p++) != rqstp->rq_seqno) | |
0c77668d | 2072 | goto bad_seqno; |
2d2da60c | 2073 | |
a0584ee9 CL |
2074 | /* gss_unwrap redacts the opaque blob from the head iovec. |
2075 | * rcv_buf has changed, thus the stream needs to be reset. | |
2076 | */ | |
2077 | xdr_init_decode(xdr, rcv_buf, p, rqstp); | |
bf269551 | 2078 | |
53bc19f1 CL |
2079 | gss_update_rslack(task, cred, 2 + ctx->gc_gss_ctx->align, |
2080 | 2 + ctx->gc_gss_ctx->slack); | |
a7e429a6 | 2081 | |
a0584ee9 CL |
2082 | return 0; |
2083 | unwrap_failed: | |
0c77668d CL |
2084 | trace_rpcgss_unwrap_failed(task); |
2085 | return -EIO; | |
2086 | bad_seqno: | |
2087 | trace_rpcgss_bad_seqno(task, rqstp->rq_seqno, be32_to_cpup(--p)); | |
a0584ee9 CL |
2088 | return -EIO; |
2089 | bad_unwrap: | |
0c77668d | 2090 | trace_rpcgss_unwrap(task, maj_stat); |
a0584ee9 | 2091 | return -EIO; |
bf269551 | 2092 | } |
2d2da60c | 2093 | |
3021a5bb TM |
2094 | static bool |
2095 | gss_seq_is_newer(u32 new, u32 old) | |
2096 | { | |
2097 | return (s32)(new - old) > 0; | |
2098 | } | |
2099 | ||
2100 | static bool | |
2101 | gss_xmit_need_reencode(struct rpc_task *task) | |
2102 | { | |
2103 | struct rpc_rqst *req = task->tk_rqstp; | |
2104 | struct rpc_cred *cred = req->rq_cred; | |
2105 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
0c77668d | 2106 | u32 win, seq_xmit = 0; |
3021a5bb TM |
2107 | bool ret = true; |
2108 | ||
2109 | if (!ctx) | |
0c77668d | 2110 | goto out; |
3021a5bb TM |
2111 | |
2112 | if (gss_seq_is_newer(req->rq_seqno, READ_ONCE(ctx->gc_seq))) | |
0c77668d | 2113 | goto out_ctx; |
3021a5bb TM |
2114 | |
2115 | seq_xmit = READ_ONCE(ctx->gc_seq_xmit); | |
2116 | while (gss_seq_is_newer(req->rq_seqno, seq_xmit)) { | |
2117 | u32 tmp = seq_xmit; | |
2118 | ||
2119 | seq_xmit = cmpxchg(&ctx->gc_seq_xmit, tmp, req->rq_seqno); | |
2120 | if (seq_xmit == tmp) { | |
2121 | ret = false; | |
0c77668d | 2122 | goto out_ctx; |
3021a5bb TM |
2123 | } |
2124 | } | |
2125 | ||
2126 | win = ctx->gc_win; | |
2127 | if (win > 0) | |
2128 | ret = !gss_seq_is_newer(req->rq_seqno, seq_xmit - win); | |
0c77668d CL |
2129 | |
2130 | out_ctx: | |
3021a5bb | 2131 | gss_put_ctx(ctx); |
0c77668d CL |
2132 | out: |
2133 | trace_rpcgss_need_reencode(task, seq_xmit, ret); | |
3021a5bb TM |
2134 | return ret; |
2135 | } | |
2136 | ||
1da177e4 | 2137 | static int |
a0584ee9 | 2138 | gss_unwrap_resp(struct rpc_task *task, struct xdr_stream *xdr) |
1da177e4 | 2139 | { |
a0584ee9 CL |
2140 | struct rpc_rqst *rqstp = task->tk_rqstp; |
2141 | struct rpc_cred *cred = rqstp->rq_cred; | |
1da177e4 LT |
2142 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
2143 | gc_base); | |
2144 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); | |
a0584ee9 | 2145 | int status = -EIO; |
1da177e4 LT |
2146 | |
2147 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) | |
2148 | goto out_decode; | |
2149 | switch (gss_cred->gc_service) { | |
89f0e4fe | 2150 | case RPC_GSS_SVC_NONE: |
53bc19f1 | 2151 | status = gss_unwrap_resp_auth(task, cred); |
89f0e4fe JP |
2152 | break; |
2153 | case RPC_GSS_SVC_INTEGRITY: | |
0c77668d | 2154 | status = gss_unwrap_resp_integ(task, cred, ctx, rqstp, xdr); |
89f0e4fe JP |
2155 | break; |
2156 | case RPC_GSS_SVC_PRIVACY: | |
0c77668d | 2157 | status = gss_unwrap_resp_priv(task, cred, ctx, rqstp, xdr); |
89f0e4fe | 2158 | break; |
1da177e4 | 2159 | } |
a0584ee9 CL |
2160 | if (status) |
2161 | goto out; | |
2162 | ||
1da177e4 | 2163 | out_decode: |
a0584ee9 | 2164 | status = rpcauth_unwrap_resp_decode(task, xdr); |
1da177e4 LT |
2165 | out: |
2166 | gss_put_ctx(ctx); | |
1da177e4 LT |
2167 | return status; |
2168 | } | |
cca5172a | 2169 | |
f1c0a861 | 2170 | static const struct rpc_authops authgss_ops = { |
1da177e4 LT |
2171 | .owner = THIS_MODULE, |
2172 | .au_flavor = RPC_AUTH_GSS, | |
1da177e4 | 2173 | .au_name = "RPCSEC_GSS", |
1da177e4 LT |
2174 | .create = gss_create, |
2175 | .destroy = gss_destroy, | |
a960f8d6 | 2176 | .hash_cred = gss_hash_cred, |
1da177e4 | 2177 | .lookup_cred = gss_lookup_cred, |
80df9d20 | 2178 | .crcreate = gss_create_cred, |
9568c5e9 | 2179 | .info2flavor = gss_mech_info2flavor, |
a77c806f | 2180 | .flavor2info = gss_mech_flavor2info, |
1da177e4 LT |
2181 | }; |
2182 | ||
f1c0a861 | 2183 | static const struct rpc_credops gss_credops = { |
a0337d1d JL |
2184 | .cr_name = "AUTH_GSS", |
2185 | .crdestroy = gss_destroy_cred, | |
2186 | .cr_init = gss_cred_init, | |
a0337d1d JL |
2187 | .crmatch = gss_match, |
2188 | .crmarshal = gss_marshal, | |
2189 | .crrefresh = gss_refresh, | |
2190 | .crvalidate = gss_validate, | |
2191 | .crwrap_req = gss_wrap_req, | |
2192 | .crunwrap_resp = gss_unwrap_resp, | |
2193 | .crkey_timeout = gss_key_timeout, | |
2194 | .crstringify_acceptor = gss_stringify_acceptor, | |
3021a5bb | 2195 | .crneed_reencode = gss_xmit_need_reencode, |
1da177e4 LT |
2196 | }; |
2197 | ||
0df7fb74 | 2198 | static const struct rpc_credops gss_nullops = { |
a0337d1d JL |
2199 | .cr_name = "AUTH_GSS", |
2200 | .crdestroy = gss_destroy_nullcred, | |
a0337d1d JL |
2201 | .crmatch = gss_match, |
2202 | .crmarshal = gss_marshal, | |
2203 | .crrefresh = gss_refresh_null, | |
2204 | .crvalidate = gss_validate, | |
2205 | .crwrap_req = gss_wrap_req, | |
2206 | .crunwrap_resp = gss_unwrap_resp, | |
2207 | .crstringify_acceptor = gss_stringify_acceptor, | |
0df7fb74 TM |
2208 | }; |
2209 | ||
b693ba4a | 2210 | static const struct rpc_pipe_ops gss_upcall_ops_v0 = { |
ac83228a | 2211 | .upcall = gss_v0_upcall, |
34769fc4 BF |
2212 | .downcall = gss_pipe_downcall, |
2213 | .destroy_msg = gss_pipe_destroy_msg, | |
2214 | .open_pipe = gss_pipe_open_v0, | |
2215 | .release_pipe = gss_pipe_release, | |
2216 | }; | |
2217 | ||
b693ba4a | 2218 | static const struct rpc_pipe_ops gss_upcall_ops_v1 = { |
ac83228a | 2219 | .upcall = gss_v1_upcall, |
1da177e4 LT |
2220 | .downcall = gss_pipe_downcall, |
2221 | .destroy_msg = gss_pipe_destroy_msg, | |
34769fc4 | 2222 | .open_pipe = gss_pipe_open_v1, |
1da177e4 LT |
2223 | .release_pipe = gss_pipe_release, |
2224 | }; | |
2225 | ||
a1db410d SK |
2226 | static __net_init int rpcsec_gss_init_net(struct net *net) |
2227 | { | |
2228 | return gss_svc_init_net(net); | |
2229 | } | |
2230 | ||
2231 | static __net_exit void rpcsec_gss_exit_net(struct net *net) | |
2232 | { | |
2233 | gss_svc_shutdown_net(net); | |
2234 | } | |
2235 | ||
2236 | static struct pernet_operations rpcsec_gss_net_ops = { | |
2237 | .init = rpcsec_gss_init_net, | |
2238 | .exit = rpcsec_gss_exit_net, | |
2239 | }; | |
2240 | ||
1da177e4 LT |
2241 | /* |
2242 | * Initialize RPCSEC_GSS module | |
2243 | */ | |
2244 | static int __init init_rpcsec_gss(void) | |
2245 | { | |
2246 | int err = 0; | |
2247 | ||
2248 | err = rpcauth_register(&authgss_ops); | |
2249 | if (err) | |
2250 | goto out; | |
2251 | err = gss_svc_init(); | |
2252 | if (err) | |
2253 | goto out_unregister; | |
a1db410d SK |
2254 | err = register_pernet_subsys(&rpcsec_gss_net_ops); |
2255 | if (err) | |
2256 | goto out_svc_exit; | |
79a3f20b | 2257 | rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); |
1da177e4 | 2258 | return 0; |
a1db410d SK |
2259 | out_svc_exit: |
2260 | gss_svc_shutdown(); | |
1da177e4 LT |
2261 | out_unregister: |
2262 | rpcauth_unregister(&authgss_ops); | |
2263 | out: | |
2264 | return err; | |
2265 | } | |
2266 | ||
2267 | static void __exit exit_rpcsec_gss(void) | |
2268 | { | |
a1db410d | 2269 | unregister_pernet_subsys(&rpcsec_gss_net_ops); |
1da177e4 LT |
2270 | gss_svc_shutdown(); |
2271 | rpcauth_unregister(&authgss_ops); | |
bf12691d | 2272 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
1da177e4 LT |
2273 | } |
2274 | ||
71afa85e | 2275 | MODULE_ALIAS("rpc-auth-6"); |
1da177e4 | 2276 | MODULE_LICENSE("GPL"); |
126e216a TM |
2277 | module_param_named(expired_cred_retry_delay, |
2278 | gss_expired_cred_retry_delay, | |
2279 | uint, 0644); | |
2280 | MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " | |
2281 | "the RPC engine retries an expired credential"); | |
2282 | ||
4de6caa2 AA |
2283 | module_param_named(key_expire_timeo, |
2284 | gss_key_expire_timeo, | |
2285 | uint, 0644); | |
2286 | MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " | |
2287 | "credential keys lifetime where the NFS layer cleans up " | |
2288 | "prior to key expiration"); | |
2289 | ||
1da177e4 LT |
2290 | module_init(init_rpcsec_gss) |
2291 | module_exit(exit_rpcsec_gss) |