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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
6a5b99a4 | 18 | * http://www.gnu.org/licenses/gpl-2.0.html |
d7e09d03 | 19 | * |
d7e09d03 PT |
20 | * GPL HEADER END |
21 | */ | |
22 | /* | |
23 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Use is subject to license terms. | |
25 | * | |
26 | * Copyright (c) 2011, 2012, Intel Corporation. | |
27 | */ | |
28 | /* | |
29 | * This file is part of Lustre, http://www.lustre.org/ | |
30 | * Lustre is a trademark of Sun Microsystems, Inc. | |
31 | * | |
32 | * lustre/ptlrpc/sec.c | |
33 | * | |
34 | * Author: Eric Mei <ericm@clusterfs.com> | |
35 | */ | |
36 | ||
37 | #define DEBUG_SUBSYSTEM S_SEC | |
38 | ||
ea6882bf | 39 | #include <linux/libcfs/libcfs.h> |
d7e09d03 | 40 | #include <linux/crypto.h> |
5b825c3a | 41 | #include <linux/cred.h> |
d7e09d03 | 42 | #include <linux/key.h> |
f719ff9b | 43 | #include <linux/sched/task.h> |
d7e09d03 | 44 | |
ea6882bf JS |
45 | #include <obd.h> |
46 | #include <obd_class.h> | |
47 | #include <obd_support.h> | |
48 | #include <lustre_net.h> | |
49 | #include <lustre_import.h> | |
50 | #include <lustre_dlm.h> | |
51 | #include <lustre_sec.h> | |
d7e09d03 PT |
52 | |
53 | #include "ptlrpc_internal.h" | |
54 | ||
55 | /*********************************************** | |
56 | * policy registers * | |
57 | ***********************************************/ | |
58 | ||
59 | static rwlock_t policy_lock; | |
60 | static struct ptlrpc_sec_policy *policies[SPTLRPC_POLICY_MAX] = { | |
61 | NULL, | |
62 | }; | |
63 | ||
64 | int sptlrpc_register_policy(struct ptlrpc_sec_policy *policy) | |
65 | { | |
66 | __u16 number = policy->sp_policy; | |
67 | ||
68 | LASSERT(policy->sp_name); | |
69 | LASSERT(policy->sp_cops); | |
70 | LASSERT(policy->sp_sops); | |
71 | ||
72 | if (number >= SPTLRPC_POLICY_MAX) | |
73 | return -EINVAL; | |
74 | ||
75 | write_lock(&policy_lock); | |
76 | if (unlikely(policies[number])) { | |
77 | write_unlock(&policy_lock); | |
78 | return -EALREADY; | |
79 | } | |
80 | policies[number] = policy; | |
81 | write_unlock(&policy_lock); | |
82 | ||
83 | CDEBUG(D_SEC, "%s: registered\n", policy->sp_name); | |
84 | return 0; | |
85 | } | |
86 | EXPORT_SYMBOL(sptlrpc_register_policy); | |
87 | ||
88 | int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy) | |
89 | { | |
90 | __u16 number = policy->sp_policy; | |
91 | ||
92 | LASSERT(number < SPTLRPC_POLICY_MAX); | |
93 | ||
94 | write_lock(&policy_lock); | |
8b382089 | 95 | if (unlikely(!policies[number])) { |
d7e09d03 PT |
96 | write_unlock(&policy_lock); |
97 | CERROR("%s: already unregistered\n", policy->sp_name); | |
98 | return -EINVAL; | |
99 | } | |
100 | ||
101 | LASSERT(policies[number] == policy); | |
102 | policies[number] = NULL; | |
103 | write_unlock(&policy_lock); | |
104 | ||
105 | CDEBUG(D_SEC, "%s: unregistered\n", policy->sp_name); | |
106 | return 0; | |
107 | } | |
108 | EXPORT_SYMBOL(sptlrpc_unregister_policy); | |
109 | ||
110 | static | |
aff9d8e8 | 111 | struct ptlrpc_sec_policy *sptlrpc_wireflavor2policy(__u32 flavor) |
d7e09d03 PT |
112 | { |
113 | static DEFINE_MUTEX(load_mutex); | |
d0bfef31 | 114 | static atomic_t loaded = ATOMIC_INIT(0); |
d7e09d03 | 115 | struct ptlrpc_sec_policy *policy; |
d0bfef31 CH |
116 | __u16 number = SPTLRPC_FLVR_POLICY(flavor); |
117 | __u16 flag = 0; | |
d7e09d03 PT |
118 | |
119 | if (number >= SPTLRPC_POLICY_MAX) | |
120 | return NULL; | |
121 | ||
122 | while (1) { | |
123 | read_lock(&policy_lock); | |
124 | policy = policies[number]; | |
125 | if (policy && !try_module_get(policy->sp_owner)) | |
126 | policy = NULL; | |
8b382089 | 127 | if (!policy) |
d7e09d03 PT |
128 | flag = atomic_read(&loaded); |
129 | read_unlock(&policy_lock); | |
130 | ||
8b382089 | 131 | if (policy || flag != 0 || |
d7e09d03 PT |
132 | number != SPTLRPC_POLICY_GSS) |
133 | break; | |
134 | ||
135 | /* try to load gss module, once */ | |
136 | mutex_lock(&load_mutex); | |
137 | if (atomic_read(&loaded) == 0) { | |
138 | if (request_module("ptlrpc_gss") == 0) | |
139 | CDEBUG(D_SEC, | |
140 | "module ptlrpc_gss loaded on demand\n"); | |
141 | else | |
142 | CERROR("Unable to load module ptlrpc_gss\n"); | |
143 | ||
144 | atomic_set(&loaded, 1); | |
145 | } | |
146 | mutex_unlock(&load_mutex); | |
147 | } | |
148 | ||
149 | return policy; | |
150 | } | |
151 | ||
152 | __u32 sptlrpc_name2flavor_base(const char *name) | |
153 | { | |
154 | if (!strcmp(name, "null")) | |
155 | return SPTLRPC_FLVR_NULL; | |
156 | if (!strcmp(name, "plain")) | |
157 | return SPTLRPC_FLVR_PLAIN; | |
158 | if (!strcmp(name, "krb5n")) | |
159 | return SPTLRPC_FLVR_KRB5N; | |
160 | if (!strcmp(name, "krb5a")) | |
161 | return SPTLRPC_FLVR_KRB5A; | |
162 | if (!strcmp(name, "krb5i")) | |
163 | return SPTLRPC_FLVR_KRB5I; | |
164 | if (!strcmp(name, "krb5p")) | |
165 | return SPTLRPC_FLVR_KRB5P; | |
166 | ||
167 | return SPTLRPC_FLVR_INVALID; | |
168 | } | |
169 | EXPORT_SYMBOL(sptlrpc_name2flavor_base); | |
170 | ||
171 | const char *sptlrpc_flavor2name_base(__u32 flvr) | |
172 | { | |
173 | __u32 base = SPTLRPC_FLVR_BASE(flvr); | |
174 | ||
175 | if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) | |
176 | return "null"; | |
177 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_PLAIN)) | |
178 | return "plain"; | |
179 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5N)) | |
180 | return "krb5n"; | |
181 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5A)) | |
182 | return "krb5a"; | |
183 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5I)) | |
184 | return "krb5i"; | |
185 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5P)) | |
186 | return "krb5p"; | |
187 | ||
188 | CERROR("invalid wire flavor 0x%x\n", flvr); | |
189 | return "invalid"; | |
190 | } | |
191 | EXPORT_SYMBOL(sptlrpc_flavor2name_base); | |
192 | ||
193 | char *sptlrpc_flavor2name_bulk(struct sptlrpc_flavor *sf, | |
194 | char *buf, int bufsize) | |
195 | { | |
196 | if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) | |
197 | snprintf(buf, bufsize, "hash:%s", | |
198 | sptlrpc_get_hash_name(sf->u_bulk.hash.hash_alg)); | |
199 | else | |
200 | snprintf(buf, bufsize, "%s", | |
201 | sptlrpc_flavor2name_base(sf->sf_rpc)); | |
202 | ||
203 | buf[bufsize - 1] = '\0'; | |
204 | return buf; | |
205 | } | |
206 | EXPORT_SYMBOL(sptlrpc_flavor2name_bulk); | |
207 | ||
208 | char *sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize) | |
209 | { | |
22e1dd69 | 210 | strlcpy(buf, sptlrpc_flavor2name_base(sf->sf_rpc), bufsize); |
d7e09d03 PT |
211 | |
212 | /* | |
213 | * currently we don't support customized bulk specification for | |
214 | * flavors other than plain | |
215 | */ | |
216 | if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) { | |
217 | char bspec[16]; | |
218 | ||
219 | bspec[0] = '-'; | |
220 | sptlrpc_flavor2name_bulk(sf, &bspec[1], sizeof(bspec) - 1); | |
22e1dd69 | 221 | strlcat(buf, bspec, bufsize); |
d7e09d03 PT |
222 | } |
223 | ||
d7e09d03 PT |
224 | return buf; |
225 | } | |
226 | EXPORT_SYMBOL(sptlrpc_flavor2name); | |
227 | ||
be23ce1d | 228 | static char *sptlrpc_secflags2str(__u32 flags, char *buf, int bufsize) |
d7e09d03 PT |
229 | { |
230 | buf[0] = '\0'; | |
231 | ||
232 | if (flags & PTLRPC_SEC_FL_REVERSE) | |
233 | strlcat(buf, "reverse,", bufsize); | |
234 | if (flags & PTLRPC_SEC_FL_ROOTONLY) | |
235 | strlcat(buf, "rootonly,", bufsize); | |
236 | if (flags & PTLRPC_SEC_FL_UDESC) | |
237 | strlcat(buf, "udesc,", bufsize); | |
238 | if (flags & PTLRPC_SEC_FL_BULK) | |
239 | strlcat(buf, "bulk,", bufsize); | |
240 | if (buf[0] == '\0') | |
241 | strlcat(buf, "-,", bufsize); | |
242 | ||
243 | return buf; | |
244 | } | |
d7e09d03 PT |
245 | |
246 | /************************************************** | |
247 | * client context APIs * | |
248 | **************************************************/ | |
249 | ||
250 | static | |
251 | struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec) | |
252 | { | |
253 | struct vfs_cred vcred; | |
254 | int create = 1, remove_dead = 1; | |
255 | ||
256 | LASSERT(sec); | |
257 | LASSERT(sec->ps_policy->sp_cops->lookup_ctx); | |
258 | ||
259 | if (sec->ps_flvr.sf_flags & (PTLRPC_SEC_FL_REVERSE | | |
260 | PTLRPC_SEC_FL_ROOTONLY)) { | |
261 | vcred.vc_uid = 0; | |
262 | vcred.vc_gid = 0; | |
263 | if (sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_REVERSE) { | |
264 | create = 0; | |
265 | remove_dead = 0; | |
266 | } | |
267 | } else { | |
4b1a25f0 PT |
268 | vcred.vc_uid = from_kuid(&init_user_ns, current_uid()); |
269 | vcred.vc_gid = from_kgid(&init_user_ns, current_gid()); | |
d7e09d03 PT |
270 | } |
271 | ||
272 | return sec->ps_policy->sp_cops->lookup_ctx(sec, &vcred, | |
273 | create, remove_dead); | |
274 | } | |
275 | ||
276 | struct ptlrpc_cli_ctx *sptlrpc_cli_ctx_get(struct ptlrpc_cli_ctx *ctx) | |
277 | { | |
278 | atomic_inc(&ctx->cc_refcount); | |
279 | return ctx; | |
280 | } | |
281 | EXPORT_SYMBOL(sptlrpc_cli_ctx_get); | |
282 | ||
283 | void sptlrpc_cli_ctx_put(struct ptlrpc_cli_ctx *ctx, int sync) | |
284 | { | |
285 | struct ptlrpc_sec *sec = ctx->cc_sec; | |
286 | ||
287 | LASSERT(sec); | |
288 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); | |
289 | ||
290 | if (!atomic_dec_and_test(&ctx->cc_refcount)) | |
291 | return; | |
292 | ||
293 | sec->ps_policy->sp_cops->release_ctx(sec, ctx, sync); | |
294 | } | |
295 | EXPORT_SYMBOL(sptlrpc_cli_ctx_put); | |
296 | ||
d7e09d03 PT |
297 | static int import_sec_check_expire(struct obd_import *imp) |
298 | { | |
d0bfef31 | 299 | int adapt = 0; |
d7e09d03 PT |
300 | |
301 | spin_lock(&imp->imp_lock); | |
302 | if (imp->imp_sec_expire && | |
986ef135 | 303 | imp->imp_sec_expire < ktime_get_real_seconds()) { |
d7e09d03 PT |
304 | adapt = 1; |
305 | imp->imp_sec_expire = 0; | |
306 | } | |
307 | spin_unlock(&imp->imp_lock); | |
308 | ||
309 | if (!adapt) | |
310 | return 0; | |
311 | ||
312 | CDEBUG(D_SEC, "found delayed sec adapt expired, do it now\n"); | |
81fb955d | 313 | return sptlrpc_import_sec_adapt(imp, NULL, NULL); |
d7e09d03 PT |
314 | } |
315 | ||
d333597a AS |
316 | /** |
317 | * Get and validate the client side ptlrpc security facilities from | |
318 | * \a imp. There is a race condition on client reconnect when the import is | |
319 | * being destroyed while there are outstanding client bound requests. In | |
320 | * this case do not output any error messages if import secuity is not | |
321 | * found. | |
322 | * | |
323 | * \param[in] imp obd import associated with client | |
324 | * \param[out] sec client side ptlrpc security | |
325 | * | |
326 | * \retval 0 if security retrieved successfully | |
327 | * \retval -ve errno if there was a problem | |
328 | */ | |
d7e09d03 PT |
329 | static int import_sec_validate_get(struct obd_import *imp, |
330 | struct ptlrpc_sec **sec) | |
331 | { | |
d0bfef31 | 332 | int rc; |
d7e09d03 PT |
333 | |
334 | if (unlikely(imp->imp_sec_expire)) { | |
335 | rc = import_sec_check_expire(imp); | |
336 | if (rc) | |
337 | return rc; | |
338 | } | |
339 | ||
340 | *sec = sptlrpc_import_sec_ref(imp); | |
d333597a | 341 | /* Only output an error when the import is still active */ |
8b382089 | 342 | if (!*sec) { |
d333597a AS |
343 | if (list_empty(&imp->imp_zombie_chain)) |
344 | CERROR("import %p (%s) with no sec\n", | |
345 | imp, ptlrpc_import_state_name(imp->imp_state)); | |
d7e09d03 PT |
346 | return -EACCES; |
347 | } | |
348 | ||
349 | if (unlikely((*sec)->ps_dying)) { | |
350 | CERROR("attempt to use dying sec %p\n", sec); | |
351 | sptlrpc_sec_put(*sec); | |
352 | return -EACCES; | |
353 | } | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | /** | |
359 | * Given a \a req, find or allocate a appropriate context for it. | |
360 | * \pre req->rq_cli_ctx == NULL. | |
361 | * | |
362 | * \retval 0 succeed, and req->rq_cli_ctx is set. | |
363 | * \retval -ev error number, and req->rq_cli_ctx == NULL. | |
364 | */ | |
365 | int sptlrpc_req_get_ctx(struct ptlrpc_request *req) | |
366 | { | |
367 | struct obd_import *imp = req->rq_import; | |
368 | struct ptlrpc_sec *sec; | |
369 | int rc; | |
d7e09d03 PT |
370 | |
371 | LASSERT(!req->rq_cli_ctx); | |
372 | LASSERT(imp); | |
373 | ||
374 | rc = import_sec_validate_get(imp, &sec); | |
375 | if (rc) | |
0a3bdb00 | 376 | return rc; |
d7e09d03 PT |
377 | |
378 | req->rq_cli_ctx = get_my_ctx(sec); | |
379 | ||
380 | sptlrpc_sec_put(sec); | |
381 | ||
382 | if (!req->rq_cli_ctx) { | |
383 | CERROR("req %p: fail to get context\n", req); | |
bb0c9db9 | 384 | return -ECONNREFUSED; |
d7e09d03 PT |
385 | } |
386 | ||
0a3bdb00 | 387 | return 0; |
d7e09d03 PT |
388 | } |
389 | ||
390 | /** | |
391 | * Drop the context for \a req. | |
392 | * \pre req->rq_cli_ctx != NULL. | |
393 | * \post req->rq_cli_ctx == NULL. | |
394 | * | |
395 | * If \a sync == 0, this function should return quickly without sleep; | |
396 | * otherwise it might trigger and wait for the whole process of sending | |
397 | * an context-destroying rpc to server. | |
398 | */ | |
399 | void sptlrpc_req_put_ctx(struct ptlrpc_request *req, int sync) | |
400 | { | |
d7e09d03 PT |
401 | LASSERT(req); |
402 | LASSERT(req->rq_cli_ctx); | |
403 | ||
404 | /* request might be asked to release earlier while still | |
405 | * in the context waiting list. | |
406 | */ | |
407 | if (!list_empty(&req->rq_ctx_chain)) { | |
408 | spin_lock(&req->rq_cli_ctx->cc_lock); | |
409 | list_del_init(&req->rq_ctx_chain); | |
410 | spin_unlock(&req->rq_cli_ctx->cc_lock); | |
411 | } | |
412 | ||
413 | sptlrpc_cli_ctx_put(req->rq_cli_ctx, sync); | |
414 | req->rq_cli_ctx = NULL; | |
d7e09d03 PT |
415 | } |
416 | ||
417 | static | |
418 | int sptlrpc_req_ctx_switch(struct ptlrpc_request *req, | |
419 | struct ptlrpc_cli_ctx *oldctx, | |
420 | struct ptlrpc_cli_ctx *newctx) | |
421 | { | |
d0bfef31 CH |
422 | struct sptlrpc_flavor old_flvr; |
423 | char *reqmsg = NULL; /* to workaround old gcc */ | |
424 | int reqmsg_size; | |
425 | int rc = 0; | |
d7e09d03 PT |
426 | |
427 | LASSERT(req->rq_reqmsg); | |
428 | LASSERT(req->rq_reqlen); | |
429 | LASSERT(req->rq_replen); | |
430 | ||
2d00bd17 JP |
431 | CDEBUG(D_SEC, "req %p: switch ctx %p(%u->%s) -> %p(%u->%s), switch sec %p(%s) -> %p(%s)\n", |
432 | req, | |
d7e09d03 PT |
433 | oldctx, oldctx->cc_vcred.vc_uid, sec2target_str(oldctx->cc_sec), |
434 | newctx, newctx->cc_vcred.vc_uid, sec2target_str(newctx->cc_sec), | |
435 | oldctx->cc_sec, oldctx->cc_sec->ps_policy->sp_name, | |
436 | newctx->cc_sec, newctx->cc_sec->ps_policy->sp_name); | |
437 | ||
438 | /* save flavor */ | |
439 | old_flvr = req->rq_flvr; | |
440 | ||
441 | /* save request message */ | |
442 | reqmsg_size = req->rq_reqlen; | |
443 | if (reqmsg_size != 0) { | |
ee0ec194 | 444 | reqmsg = libcfs_kvzalloc(reqmsg_size, GFP_NOFS); |
8b382089 | 445 | if (!reqmsg) |
d7e09d03 PT |
446 | return -ENOMEM; |
447 | memcpy(reqmsg, req->rq_reqmsg, reqmsg_size); | |
448 | } | |
449 | ||
450 | /* release old req/rep buf */ | |
451 | req->rq_cli_ctx = oldctx; | |
452 | sptlrpc_cli_free_reqbuf(req); | |
453 | sptlrpc_cli_free_repbuf(req); | |
454 | req->rq_cli_ctx = newctx; | |
455 | ||
456 | /* recalculate the flavor */ | |
457 | sptlrpc_req_set_flavor(req, 0); | |
458 | ||
459 | /* alloc new request buffer | |
460 | * we don't need to alloc reply buffer here, leave it to the | |
dadfcdab OD |
461 | * rest procedure of ptlrpc |
462 | */ | |
d7e09d03 PT |
463 | if (reqmsg_size != 0) { |
464 | rc = sptlrpc_cli_alloc_reqbuf(req, reqmsg_size); | |
465 | if (!rc) { | |
466 | LASSERT(req->rq_reqmsg); | |
467 | memcpy(req->rq_reqmsg, reqmsg, reqmsg_size); | |
468 | } else { | |
469 | CWARN("failed to alloc reqbuf: %d\n", rc); | |
470 | req->rq_flvr = old_flvr; | |
471 | } | |
472 | ||
ee0ec194 | 473 | kvfree(reqmsg); |
d7e09d03 PT |
474 | } |
475 | return rc; | |
476 | } | |
477 | ||
478 | /** | |
479 | * If current context of \a req is dead somehow, e.g. we just switched flavor | |
480 | * thus marked original contexts dead, we'll find a new context for it. if | |
481 | * no switch is needed, \a req will end up with the same context. | |
482 | * | |
483 | * \note a request must have a context, to keep other parts of code happy. | |
484 | * In any case of failure during the switching, we must restore the old one. | |
485 | */ | |
cf0a7f9e | 486 | static int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req) |
d7e09d03 PT |
487 | { |
488 | struct ptlrpc_cli_ctx *oldctx = req->rq_cli_ctx; | |
489 | struct ptlrpc_cli_ctx *newctx; | |
d0bfef31 | 490 | int rc; |
d7e09d03 PT |
491 | |
492 | LASSERT(oldctx); | |
493 | ||
494 | sptlrpc_cli_ctx_get(oldctx); | |
495 | sptlrpc_req_put_ctx(req, 0); | |
496 | ||
497 | rc = sptlrpc_req_get_ctx(req); | |
498 | if (unlikely(rc)) { | |
499 | LASSERT(!req->rq_cli_ctx); | |
500 | ||
501 | /* restore old ctx */ | |
502 | req->rq_cli_ctx = oldctx; | |
0a3bdb00 | 503 | return rc; |
d7e09d03 PT |
504 | } |
505 | ||
506 | newctx = req->rq_cli_ctx; | |
507 | LASSERT(newctx); | |
508 | ||
509 | if (unlikely(newctx == oldctx && | |
510 | test_bit(PTLRPC_CTX_DEAD_BIT, &oldctx->cc_flags))) { | |
511 | /* | |
512 | * still get the old dead ctx, usually means system too busy | |
513 | */ | |
514 | CDEBUG(D_SEC, | |
515 | "ctx (%p, fl %lx) doesn't switch, relax a little bit\n", | |
516 | newctx, newctx->cc_flags); | |
517 | ||
18fd5baa | 518 | set_current_state(TASK_INTERRUPTIBLE); |
df3c30f6 | 519 | schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC)); |
bbadab80 SB |
520 | } else if (unlikely(!test_bit(PTLRPC_CTX_UPTODATE_BIT, &newctx->cc_flags))) { |
521 | /* | |
522 | * new ctx not up to date yet | |
523 | */ | |
524 | CDEBUG(D_SEC, | |
525 | "ctx (%p, fl %lx) doesn't switch, not up to date yet\n", | |
526 | newctx, newctx->cc_flags); | |
d7e09d03 PT |
527 | } else { |
528 | /* | |
529 | * it's possible newctx == oldctx if we're switching | |
530 | * subflavor with the same sec. | |
531 | */ | |
532 | rc = sptlrpc_req_ctx_switch(req, oldctx, newctx); | |
533 | if (rc) { | |
534 | /* restore old ctx */ | |
535 | sptlrpc_req_put_ctx(req, 0); | |
536 | req->rq_cli_ctx = oldctx; | |
0a3bdb00 | 537 | return rc; |
d7e09d03 PT |
538 | } |
539 | ||
540 | LASSERT(req->rq_cli_ctx == newctx); | |
541 | } | |
542 | ||
543 | sptlrpc_cli_ctx_put(oldctx, 1); | |
0a3bdb00 | 544 | return 0; |
d7e09d03 | 545 | } |
d7e09d03 PT |
546 | |
547 | static | |
548 | int ctx_check_refresh(struct ptlrpc_cli_ctx *ctx) | |
549 | { | |
550 | if (cli_ctx_is_refreshed(ctx)) | |
551 | return 1; | |
552 | return 0; | |
553 | } | |
554 | ||
555 | static | |
556 | int ctx_refresh_timeout(void *data) | |
557 | { | |
558 | struct ptlrpc_request *req = data; | |
559 | int rc; | |
560 | ||
561 | /* conn_cnt is needed in expire_one_request */ | |
562 | lustre_msg_set_conn_cnt(req->rq_reqmsg, req->rq_import->imp_conn_cnt); | |
563 | ||
564 | rc = ptlrpc_expire_one_request(req, 1); | |
565 | /* if we started recovery, we should mark this ctx dead; otherwise | |
566 | * in case of lgssd died nobody would retire this ctx, following | |
567 | * connecting will still find the same ctx thus cause deadlock. | |
568 | * there's an assumption that expire time of the request should be | |
569 | * later than the context refresh expire time. | |
570 | */ | |
571 | if (rc == 0) | |
d0f17b64 | 572 | req->rq_cli_ctx->cc_ops->force_die(req->rq_cli_ctx, 0); |
d7e09d03 PT |
573 | return rc; |
574 | } | |
575 | ||
576 | static | |
577 | void ctx_refresh_interrupt(void *data) | |
578 | { | |
579 | struct ptlrpc_request *req = data; | |
580 | ||
581 | spin_lock(&req->rq_lock); | |
582 | req->rq_intr = 1; | |
583 | spin_unlock(&req->rq_lock); | |
584 | } | |
585 | ||
586 | static | |
587 | void req_off_ctx_list(struct ptlrpc_request *req, struct ptlrpc_cli_ctx *ctx) | |
588 | { | |
589 | spin_lock(&ctx->cc_lock); | |
590 | if (!list_empty(&req->rq_ctx_chain)) | |
591 | list_del_init(&req->rq_ctx_chain); | |
592 | spin_unlock(&ctx->cc_lock); | |
593 | } | |
594 | ||
595 | /** | |
596 | * To refresh the context of \req, if it's not up-to-date. | |
597 | * \param timeout | |
598 | * - < 0: don't wait | |
599 | * - = 0: wait until success or fatal error occur | |
600 | * - > 0: timeout value (in seconds) | |
601 | * | |
602 | * The status of the context could be subject to be changed by other threads | |
603 | * at any time. We allow this race, but once we return with 0, the caller will | |
604 | * suppose it's uptodated and keep using it until the owning rpc is done. | |
605 | * | |
606 | * \retval 0 only if the context is uptodated. | |
607 | * \retval -ev error number. | |
608 | */ | |
609 | int sptlrpc_req_refresh_ctx(struct ptlrpc_request *req, long timeout) | |
610 | { | |
d0bfef31 CH |
611 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
612 | struct ptlrpc_sec *sec; | |
613 | struct l_wait_info lwi; | |
614 | int rc; | |
d7e09d03 PT |
615 | |
616 | LASSERT(ctx); | |
617 | ||
618 | if (req->rq_ctx_init || req->rq_ctx_fini) | |
0a3bdb00 | 619 | return 0; |
d7e09d03 PT |
620 | |
621 | /* | |
622 | * during the process a request's context might change type even | |
623 | * (e.g. from gss ctx to null ctx), so each loop we need to re-check | |
624 | * everything | |
625 | */ | |
626 | again: | |
627 | rc = import_sec_validate_get(req->rq_import, &sec); | |
628 | if (rc) | |
0a3bdb00 | 629 | return rc; |
d7e09d03 PT |
630 | |
631 | if (sec->ps_flvr.sf_rpc != req->rq_flvr.sf_rpc) { | |
632 | CDEBUG(D_SEC, "req %p: flavor has changed %x -> %x\n", | |
30c0aa39 | 633 | req, req->rq_flvr.sf_rpc, sec->ps_flvr.sf_rpc); |
d7e09d03 PT |
634 | req_off_ctx_list(req, ctx); |
635 | sptlrpc_req_replace_dead_ctx(req); | |
636 | ctx = req->rq_cli_ctx; | |
637 | } | |
638 | sptlrpc_sec_put(sec); | |
639 | ||
640 | if (cli_ctx_is_eternal(ctx)) | |
0a3bdb00 | 641 | return 0; |
d7e09d03 PT |
642 | |
643 | if (unlikely(test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags))) { | |
644 | LASSERT(ctx->cc_ops->refresh); | |
645 | ctx->cc_ops->refresh(ctx); | |
646 | } | |
647 | LASSERT(test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags) == 0); | |
648 | ||
649 | LASSERT(ctx->cc_ops->validate); | |
650 | if (ctx->cc_ops->validate(ctx) == 0) { | |
651 | req_off_ctx_list(req, ctx); | |
0a3bdb00 | 652 | return 0; |
d7e09d03 PT |
653 | } |
654 | ||
655 | if (unlikely(test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags))) { | |
656 | spin_lock(&req->rq_lock); | |
657 | req->rq_err = 1; | |
658 | spin_unlock(&req->rq_lock); | |
659 | req_off_ctx_list(req, ctx); | |
0a3bdb00 | 660 | return -EPERM; |
d7e09d03 PT |
661 | } |
662 | ||
663 | /* | |
664 | * There's a subtle issue for resending RPCs, suppose following | |
665 | * situation: | |
666 | * 1. the request was sent to server. | |
667 | * 2. recovery was kicked start, after finished the request was | |
668 | * marked as resent. | |
669 | * 3. resend the request. | |
670 | * 4. old reply from server received, we accept and verify the reply. | |
671 | * this has to be success, otherwise the error will be aware | |
672 | * by application. | |
673 | * 5. new reply from server received, dropped by LNet. | |
674 | * | |
675 | * Note the xid of old & new request is the same. We can't simply | |
676 | * change xid for the resent request because the server replies on | |
677 | * it for reply reconstruction. | |
678 | * | |
679 | * Commonly the original context should be uptodate because we | |
680 | * have a expiry nice time; server will keep its context because | |
681 | * we at least hold a ref of old context which prevent context | |
682 | * destroying RPC being sent. So server still can accept the request | |
683 | * and finish the RPC. But if that's not the case: | |
684 | * 1. If server side context has been trimmed, a NO_CONTEXT will | |
685 | * be returned, gss_cli_ctx_verify/unseal will switch to new | |
686 | * context by force. | |
687 | * 2. Current context never be refreshed, then we are fine: we | |
688 | * never really send request with old context before. | |
689 | */ | |
690 | if (test_bit(PTLRPC_CTX_UPTODATE_BIT, &ctx->cc_flags) && | |
691 | unlikely(req->rq_reqmsg) && | |
692 | lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { | |
693 | req_off_ctx_list(req, ctx); | |
0a3bdb00 | 694 | return 0; |
d7e09d03 PT |
695 | } |
696 | ||
697 | if (unlikely(test_bit(PTLRPC_CTX_DEAD_BIT, &ctx->cc_flags))) { | |
698 | req_off_ctx_list(req, ctx); | |
699 | /* | |
700 | * don't switch ctx if import was deactivated | |
701 | */ | |
702 | if (req->rq_import->imp_deactive) { | |
703 | spin_lock(&req->rq_lock); | |
704 | req->rq_err = 1; | |
705 | spin_unlock(&req->rq_lock); | |
0a3bdb00 | 706 | return -EINTR; |
d7e09d03 PT |
707 | } |
708 | ||
709 | rc = sptlrpc_req_replace_dead_ctx(req); | |
710 | if (rc) { | |
711 | LASSERT(ctx == req->rq_cli_ctx); | |
712 | CERROR("req %p: failed to replace dead ctx %p: %d\n", | |
713 | req, ctx, rc); | |
714 | spin_lock(&req->rq_lock); | |
715 | req->rq_err = 1; | |
716 | spin_unlock(&req->rq_lock); | |
0a3bdb00 | 717 | return rc; |
d7e09d03 PT |
718 | } |
719 | ||
720 | ctx = req->rq_cli_ctx; | |
721 | goto again; | |
722 | } | |
723 | ||
724 | /* | |
725 | * Now we're sure this context is during upcall, add myself into | |
726 | * waiting list | |
727 | */ | |
728 | spin_lock(&ctx->cc_lock); | |
729 | if (list_empty(&req->rq_ctx_chain)) | |
730 | list_add(&req->rq_ctx_chain, &ctx->cc_req_list); | |
731 | spin_unlock(&ctx->cc_lock); | |
732 | ||
733 | if (timeout < 0) | |
0a3bdb00 | 734 | return -EWOULDBLOCK; |
d7e09d03 PT |
735 | |
736 | /* Clear any flags that may be present from previous sends */ | |
737 | LASSERT(req->rq_receiving_reply == 0); | |
738 | spin_lock(&req->rq_lock); | |
739 | req->rq_err = 0; | |
740 | req->rq_timedout = 0; | |
741 | req->rq_resend = 0; | |
742 | req->rq_restart = 0; | |
743 | spin_unlock(&req->rq_lock); | |
744 | ||
df3c30f6 JY |
745 | lwi = LWI_TIMEOUT_INTR(msecs_to_jiffies(timeout * MSEC_PER_SEC), |
746 | ctx_refresh_timeout, ctx_refresh_interrupt, | |
747 | req); | |
d7e09d03 PT |
748 | rc = l_wait_event(req->rq_reply_waitq, ctx_check_refresh(ctx), &lwi); |
749 | ||
750 | /* | |
751 | * following cases could lead us here: | |
752 | * - successfully refreshed; | |
753 | * - interrupted; | |
754 | * - timedout, and we don't want recover from the failure; | |
755 | * - timedout, and waked up upon recovery finished; | |
756 | * - someone else mark this ctx dead by force; | |
757 | * - someone invalidate the req and call ptlrpc_client_wake_req(), | |
758 | * e.g. ptlrpc_abort_inflight(); | |
759 | */ | |
760 | if (!cli_ctx_is_refreshed(ctx)) { | |
0c2bc758 | 761 | /* timed out or interrupted */ |
d7e09d03 PT |
762 | req_off_ctx_list(req, ctx); |
763 | ||
764 | LASSERT(rc != 0); | |
0a3bdb00 | 765 | return rc; |
d7e09d03 PT |
766 | } |
767 | ||
768 | goto again; | |
769 | } | |
770 | ||
771 | /** | |
772 | * Initialize flavor settings for \a req, according to \a opcode. | |
773 | * | |
774 | * \note this could be called in two situations: | |
775 | * - new request from ptlrpc_pre_req(), with proper @opcode | |
776 | * - old request which changed ctx in the middle, with @opcode == 0 | |
777 | */ | |
778 | void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode) | |
779 | { | |
780 | struct ptlrpc_sec *sec; | |
781 | ||
782 | LASSERT(req->rq_import); | |
783 | LASSERT(req->rq_cli_ctx); | |
784 | LASSERT(req->rq_cli_ctx->cc_sec); | |
785 | LASSERT(req->rq_bulk_read == 0 || req->rq_bulk_write == 0); | |
786 | ||
0c2bc758 | 787 | /* special security flags according to opcode */ |
d7e09d03 PT |
788 | switch (opcode) { |
789 | case OST_READ: | |
790 | case MDS_READPAGE: | |
791 | case MGS_CONFIG_READ: | |
792 | case OBD_IDX_READ: | |
793 | req->rq_bulk_read = 1; | |
794 | break; | |
795 | case OST_WRITE: | |
796 | case MDS_WRITEPAGE: | |
797 | req->rq_bulk_write = 1; | |
798 | break; | |
799 | case SEC_CTX_INIT: | |
800 | req->rq_ctx_init = 1; | |
801 | break; | |
802 | case SEC_CTX_FINI: | |
803 | req->rq_ctx_fini = 1; | |
804 | break; | |
805 | case 0: | |
806 | /* init/fini rpc won't be resend, so can't be here */ | |
807 | LASSERT(req->rq_ctx_init == 0); | |
808 | LASSERT(req->rq_ctx_fini == 0); | |
809 | ||
810 | /* cleanup flags, which should be recalculated */ | |
811 | req->rq_pack_udesc = 0; | |
812 | req->rq_pack_bulk = 0; | |
813 | break; | |
814 | } | |
815 | ||
816 | sec = req->rq_cli_ctx->cc_sec; | |
817 | ||
818 | spin_lock(&sec->ps_lock); | |
819 | req->rq_flvr = sec->ps_flvr; | |
820 | spin_unlock(&sec->ps_lock); | |
821 | ||
822 | /* force SVC_NULL for context initiation rpc, SVC_INTG for context | |
dadfcdab OD |
823 | * destruction rpc |
824 | */ | |
d7e09d03 PT |
825 | if (unlikely(req->rq_ctx_init)) |
826 | flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_NULL); | |
827 | else if (unlikely(req->rq_ctx_fini)) | |
828 | flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_INTG); | |
829 | ||
830 | /* user descriptor flag, null security can't do it anyway */ | |
831 | if ((sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_UDESC) && | |
832 | (req->rq_flvr.sf_rpc != SPTLRPC_FLVR_NULL)) | |
833 | req->rq_pack_udesc = 1; | |
834 | ||
835 | /* bulk security flag */ | |
836 | if ((req->rq_bulk_read || req->rq_bulk_write) && | |
837 | sptlrpc_flavor_has_bulk(&req->rq_flvr)) | |
838 | req->rq_pack_bulk = 1; | |
839 | } | |
840 | ||
841 | void sptlrpc_request_out_callback(struct ptlrpc_request *req) | |
842 | { | |
843 | if (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc) != SPTLRPC_SVC_PRIV) | |
844 | return; | |
845 | ||
846 | LASSERT(req->rq_clrbuf); | |
847 | if (req->rq_pool || !req->rq_reqbuf) | |
848 | return; | |
849 | ||
9ae10597 | 850 | kfree(req->rq_reqbuf); |
d7e09d03 PT |
851 | req->rq_reqbuf = NULL; |
852 | req->rq_reqbuf_len = 0; | |
853 | } | |
854 | ||
855 | /** | |
856 | * Given an import \a imp, check whether current user has a valid context | |
857 | * or not. We may create a new context and try to refresh it, and try | |
858 | * repeatedly try in case of non-fatal errors. Return 0 means success. | |
859 | */ | |
860 | int sptlrpc_import_check_ctx(struct obd_import *imp) | |
861 | { | |
d0bfef31 | 862 | struct ptlrpc_sec *sec; |
d7e09d03 PT |
863 | struct ptlrpc_cli_ctx *ctx; |
864 | struct ptlrpc_request *req = NULL; | |
865 | int rc; | |
d7e09d03 PT |
866 | |
867 | might_sleep(); | |
868 | ||
869 | sec = sptlrpc_import_sec_ref(imp); | |
870 | ctx = get_my_ctx(sec); | |
871 | sptlrpc_sec_put(sec); | |
872 | ||
873 | if (!ctx) | |
0a3bdb00 | 874 | return -ENOMEM; |
d7e09d03 PT |
875 | |
876 | if (cli_ctx_is_eternal(ctx) || | |
877 | ctx->cc_ops->validate(ctx) == 0) { | |
878 | sptlrpc_cli_ctx_put(ctx, 1); | |
0a3bdb00 | 879 | return 0; |
d7e09d03 PT |
880 | } |
881 | ||
882 | if (cli_ctx_is_error(ctx)) { | |
883 | sptlrpc_cli_ctx_put(ctx, 1); | |
0a3bdb00 | 884 | return -EACCES; |
d7e09d03 PT |
885 | } |
886 | ||
0be19afa | 887 | req = ptlrpc_request_cache_alloc(GFP_NOFS); |
d7e09d03 | 888 | if (!req) |
0a3bdb00 | 889 | return -ENOMEM; |
d7e09d03 | 890 | |
32c8728d | 891 | ptlrpc_cli_req_init(req); |
d7e09d03 | 892 | atomic_set(&req->rq_refcount, 10000); |
32c8728d | 893 | |
d7e09d03 PT |
894 | req->rq_import = imp; |
895 | req->rq_flvr = sec->ps_flvr; | |
896 | req->rq_cli_ctx = ctx; | |
897 | ||
898 | rc = sptlrpc_req_refresh_ctx(req, 0); | |
899 | LASSERT(list_empty(&req->rq_ctx_chain)); | |
900 | sptlrpc_cli_ctx_put(req->rq_cli_ctx, 1); | |
35b2e1b7 | 901 | ptlrpc_request_cache_free(req); |
d7e09d03 | 902 | |
0a3bdb00 | 903 | return rc; |
d7e09d03 PT |
904 | } |
905 | ||
906 | /** | |
907 | * Used by ptlrpc client, to perform the pre-defined security transformation | |
908 | * upon the request message of \a req. After this function called, | |
909 | * req->rq_reqmsg is still accessible as clear text. | |
910 | */ | |
911 | int sptlrpc_cli_wrap_request(struct ptlrpc_request *req) | |
912 | { | |
913 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
914 | int rc = 0; | |
d7e09d03 PT |
915 | |
916 | LASSERT(ctx); | |
917 | LASSERT(ctx->cc_sec); | |
918 | LASSERT(req->rq_reqbuf || req->rq_clrbuf); | |
919 | ||
920 | /* we wrap bulk request here because now we can be sure | |
921 | * the context is uptodate. | |
922 | */ | |
923 | if (req->rq_bulk) { | |
924 | rc = sptlrpc_cli_wrap_bulk(req, req->rq_bulk); | |
925 | if (rc) | |
0a3bdb00 | 926 | return rc; |
d7e09d03 PT |
927 | } |
928 | ||
929 | switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { | |
930 | case SPTLRPC_SVC_NULL: | |
931 | case SPTLRPC_SVC_AUTH: | |
932 | case SPTLRPC_SVC_INTG: | |
933 | LASSERT(ctx->cc_ops->sign); | |
934 | rc = ctx->cc_ops->sign(ctx, req); | |
935 | break; | |
936 | case SPTLRPC_SVC_PRIV: | |
937 | LASSERT(ctx->cc_ops->seal); | |
938 | rc = ctx->cc_ops->seal(ctx, req); | |
939 | break; | |
940 | default: | |
941 | LBUG(); | |
942 | } | |
943 | ||
944 | if (rc == 0) { | |
945 | LASSERT(req->rq_reqdata_len); | |
946 | LASSERT(req->rq_reqdata_len % 8 == 0); | |
947 | LASSERT(req->rq_reqdata_len <= req->rq_reqbuf_len); | |
948 | } | |
949 | ||
0a3bdb00 | 950 | return rc; |
d7e09d03 PT |
951 | } |
952 | ||
953 | static int do_cli_unwrap_reply(struct ptlrpc_request *req) | |
954 | { | |
955 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
d0bfef31 | 956 | int rc; |
d7e09d03 PT |
957 | |
958 | LASSERT(ctx); | |
959 | LASSERT(ctx->cc_sec); | |
960 | LASSERT(req->rq_repbuf); | |
961 | LASSERT(req->rq_repdata); | |
8b382089 | 962 | LASSERT(!req->rq_repmsg); |
d7e09d03 PT |
963 | |
964 | req->rq_rep_swab_mask = 0; | |
965 | ||
966 | rc = __lustre_unpack_msg(req->rq_repdata, req->rq_repdata_len); | |
967 | switch (rc) { | |
968 | case 1: | |
969 | lustre_set_rep_swabbed(req, MSG_PTLRPC_HEADER_OFF); | |
970 | case 0: | |
971 | break; | |
972 | default: | |
b0f5aad5 | 973 | CERROR("failed unpack reply: x%llu\n", req->rq_xid); |
0a3bdb00 | 974 | return -EPROTO; |
d7e09d03 PT |
975 | } |
976 | ||
977 | if (req->rq_repdata_len < sizeof(struct lustre_msg)) { | |
978 | CERROR("replied data length %d too small\n", | |
979 | req->rq_repdata_len); | |
0a3bdb00 | 980 | return -EPROTO; |
d7e09d03 PT |
981 | } |
982 | ||
983 | if (SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr) != | |
984 | SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)) { | |
985 | CERROR("reply policy %u doesn't match request policy %u\n", | |
986 | SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr), | |
987 | SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)); | |
0a3bdb00 | 988 | return -EPROTO; |
d7e09d03 PT |
989 | } |
990 | ||
991 | switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { | |
992 | case SPTLRPC_SVC_NULL: | |
993 | case SPTLRPC_SVC_AUTH: | |
994 | case SPTLRPC_SVC_INTG: | |
995 | LASSERT(ctx->cc_ops->verify); | |
996 | rc = ctx->cc_ops->verify(ctx, req); | |
997 | break; | |
998 | case SPTLRPC_SVC_PRIV: | |
999 | LASSERT(ctx->cc_ops->unseal); | |
1000 | rc = ctx->cc_ops->unseal(ctx, req); | |
1001 | break; | |
1002 | default: | |
1003 | LBUG(); | |
1004 | } | |
1005 | LASSERT(rc || req->rq_repmsg || req->rq_resend); | |
1006 | ||
1007 | if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL && | |
1008 | !req->rq_ctx_init) | |
1009 | req->rq_rep_swab_mask = 0; | |
0a3bdb00 | 1010 | return rc; |
d7e09d03 PT |
1011 | } |
1012 | ||
1013 | /** | |
1014 | * Used by ptlrpc client, to perform security transformation upon the reply | |
1015 | * message of \a req. After return successfully, req->rq_repmsg points to | |
1016 | * the reply message in clear text. | |
1017 | * | |
1018 | * \pre the reply buffer should have been un-posted from LNet, so nothing is | |
1019 | * going to change. | |
1020 | */ | |
1021 | int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) | |
1022 | { | |
1023 | LASSERT(req->rq_repbuf); | |
8b382089 OD |
1024 | LASSERT(!req->rq_repdata); |
1025 | LASSERT(!req->rq_repmsg); | |
d7e09d03 PT |
1026 | LASSERT(req->rq_reply_off + req->rq_nob_received <= req->rq_repbuf_len); |
1027 | ||
1028 | if (req->rq_reply_off == 0 && | |
1029 | (lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) { | |
1030 | CERROR("real reply with offset 0\n"); | |
1031 | return -EPROTO; | |
1032 | } | |
1033 | ||
1034 | if (req->rq_reply_off % 8 != 0) { | |
1035 | CERROR("reply at odd offset %u\n", req->rq_reply_off); | |
1036 | return -EPROTO; | |
1037 | } | |
1038 | ||
1039 | req->rq_repdata = (struct lustre_msg *) | |
1040 | (req->rq_repbuf + req->rq_reply_off); | |
1041 | req->rq_repdata_len = req->rq_nob_received; | |
1042 | ||
1043 | return do_cli_unwrap_reply(req); | |
1044 | } | |
1045 | ||
1046 | /** | |
1047 | * Used by ptlrpc client, to perform security transformation upon the early | |
1048 | * reply message of \a req. We expect the rq_reply_off is 0, and | |
1049 | * rq_nob_received is the early reply size. | |
1050 | * | |
1051 | * Because the receive buffer might be still posted, the reply data might be | |
1052 | * changed at any time, no matter we're holding rq_lock or not. For this reason | |
1053 | * we allocate a separate ptlrpc_request and reply buffer for early reply | |
1054 | * processing. | |
1055 | * | |
1056 | * \retval 0 success, \a req_ret is filled with a duplicated ptlrpc_request. | |
1057 | * Later the caller must call sptlrpc_cli_finish_early_reply() on the returned | |
1058 | * \a *req_ret to release it. | |
1059 | * \retval -ev error number, and \a req_ret will not be set. | |
1060 | */ | |
1061 | int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req, | |
1062 | struct ptlrpc_request **req_ret) | |
1063 | { | |
d0bfef31 CH |
1064 | struct ptlrpc_request *early_req; |
1065 | char *early_buf; | |
1066 | int early_bufsz, early_size; | |
1067 | int rc; | |
d7e09d03 | 1068 | |
0be19afa | 1069 | early_req = ptlrpc_request_cache_alloc(GFP_NOFS); |
8b382089 | 1070 | if (!early_req) |
0a3bdb00 | 1071 | return -ENOMEM; |
d7e09d03 | 1072 | |
32c8728d LZ |
1073 | ptlrpc_cli_req_init(early_req); |
1074 | ||
d7e09d03 PT |
1075 | early_size = req->rq_nob_received; |
1076 | early_bufsz = size_roundup_power2(early_size); | |
ee0ec194 | 1077 | early_buf = libcfs_kvzalloc(early_bufsz, GFP_NOFS); |
8b382089 | 1078 | if (!early_buf) { |
a9b3e8f3 JL |
1079 | rc = -ENOMEM; |
1080 | goto err_req; | |
1081 | } | |
d7e09d03 PT |
1082 | |
1083 | /* sanity checkings and copy data out, do it inside spinlock */ | |
1084 | spin_lock(&req->rq_lock); | |
1085 | ||
1086 | if (req->rq_replied) { | |
1087 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1088 | rc = -EALREADY; |
1089 | goto err_buf; | |
d7e09d03 PT |
1090 | } |
1091 | ||
1092 | LASSERT(req->rq_repbuf); | |
8b382089 OD |
1093 | LASSERT(!req->rq_repdata); |
1094 | LASSERT(!req->rq_repmsg); | |
d7e09d03 PT |
1095 | |
1096 | if (req->rq_reply_off != 0) { | |
1097 | CERROR("early reply with offset %u\n", req->rq_reply_off); | |
1098 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1099 | rc = -EPROTO; |
1100 | goto err_buf; | |
d7e09d03 PT |
1101 | } |
1102 | ||
1103 | if (req->rq_nob_received != early_size) { | |
1104 | /* even another early arrived the size should be the same */ | |
1105 | CERROR("data size has changed from %u to %u\n", | |
1106 | early_size, req->rq_nob_received); | |
1107 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1108 | rc = -EINVAL; |
1109 | goto err_buf; | |
d7e09d03 PT |
1110 | } |
1111 | ||
1112 | if (req->rq_nob_received < sizeof(struct lustre_msg)) { | |
1113 | CERROR("early reply length %d too small\n", | |
1114 | req->rq_nob_received); | |
1115 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1116 | rc = -EALREADY; |
1117 | goto err_buf; | |
d7e09d03 PT |
1118 | } |
1119 | ||
1120 | memcpy(early_buf, req->rq_repbuf, early_size); | |
1121 | spin_unlock(&req->rq_lock); | |
1122 | ||
d7e09d03 PT |
1123 | early_req->rq_cli_ctx = sptlrpc_cli_ctx_get(req->rq_cli_ctx); |
1124 | early_req->rq_flvr = req->rq_flvr; | |
1125 | early_req->rq_repbuf = early_buf; | |
1126 | early_req->rq_repbuf_len = early_bufsz; | |
9797fb0e | 1127 | early_req->rq_repdata = (struct lustre_msg *)early_buf; |
d7e09d03 PT |
1128 | early_req->rq_repdata_len = early_size; |
1129 | early_req->rq_early = 1; | |
1130 | early_req->rq_reqmsg = req->rq_reqmsg; | |
1131 | ||
1132 | rc = do_cli_unwrap_reply(early_req); | |
1133 | if (rc) { | |
1134 | DEBUG_REQ(D_ADAPTTO, early_req, | |
1135 | "error %d unwrap early reply", rc); | |
a9b3e8f3 | 1136 | goto err_ctx; |
d7e09d03 PT |
1137 | } |
1138 | ||
1139 | LASSERT(early_req->rq_repmsg); | |
1140 | *req_ret = early_req; | |
0a3bdb00 | 1141 | return 0; |
d7e09d03 PT |
1142 | |
1143 | err_ctx: | |
1144 | sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); | |
1145 | err_buf: | |
ee0ec194 | 1146 | kvfree(early_buf); |
d7e09d03 | 1147 | err_req: |
35b2e1b7 | 1148 | ptlrpc_request_cache_free(early_req); |
0a3bdb00 | 1149 | return rc; |
d7e09d03 PT |
1150 | } |
1151 | ||
1152 | /** | |
1153 | * Used by ptlrpc client, to release a processed early reply \a early_req. | |
1154 | * | |
1155 | * \pre \a early_req was obtained from calling sptlrpc_cli_unwrap_early_reply(). | |
1156 | */ | |
1157 | void sptlrpc_cli_finish_early_reply(struct ptlrpc_request *early_req) | |
1158 | { | |
1159 | LASSERT(early_req->rq_repbuf); | |
1160 | LASSERT(early_req->rq_repdata); | |
1161 | LASSERT(early_req->rq_repmsg); | |
1162 | ||
1163 | sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); | |
ee0ec194 | 1164 | kvfree(early_req->rq_repbuf); |
35b2e1b7 | 1165 | ptlrpc_request_cache_free(early_req); |
d7e09d03 PT |
1166 | } |
1167 | ||
1168 | /************************************************** | |
1169 | * sec ID * | |
1170 | **************************************************/ | |
1171 | ||
1172 | /* | |
1173 | * "fixed" sec (e.g. null) use sec_id < 0 | |
1174 | */ | |
1175 | static atomic_t sptlrpc_sec_id = ATOMIC_INIT(1); | |
1176 | ||
1177 | int sptlrpc_get_next_secid(void) | |
1178 | { | |
1179 | return atomic_inc_return(&sptlrpc_sec_id); | |
1180 | } | |
1181 | EXPORT_SYMBOL(sptlrpc_get_next_secid); | |
1182 | ||
1183 | /************************************************** | |
1184 | * client side high-level security APIs * | |
1185 | **************************************************/ | |
1186 | ||
1187 | static int sec_cop_flush_ctx_cache(struct ptlrpc_sec *sec, uid_t uid, | |
1188 | int grace, int force) | |
1189 | { | |
1190 | struct ptlrpc_sec_policy *policy = sec->ps_policy; | |
1191 | ||
1192 | LASSERT(policy->sp_cops); | |
1193 | LASSERT(policy->sp_cops->flush_ctx_cache); | |
1194 | ||
1195 | return policy->sp_cops->flush_ctx_cache(sec, uid, grace, force); | |
1196 | } | |
1197 | ||
1198 | static void sec_cop_destroy_sec(struct ptlrpc_sec *sec) | |
1199 | { | |
1200 | struct ptlrpc_sec_policy *policy = sec->ps_policy; | |
1201 | ||
1202 | LASSERT_ATOMIC_ZERO(&sec->ps_refcount); | |
1203 | LASSERT_ATOMIC_ZERO(&sec->ps_nctx); | |
1204 | LASSERT(policy->sp_cops->destroy_sec); | |
1205 | ||
0c2bc758 | 1206 | CDEBUG(D_SEC, "%s@%p: being destroyed\n", sec->ps_policy->sp_name, sec); |
d7e09d03 PT |
1207 | |
1208 | policy->sp_cops->destroy_sec(sec); | |
1209 | sptlrpc_policy_put(policy); | |
1210 | } | |
1211 | ||
d7e09d03 PT |
1212 | static void sptlrpc_sec_kill(struct ptlrpc_sec *sec) |
1213 | { | |
1214 | LASSERT_ATOMIC_POS(&sec->ps_refcount); | |
1215 | ||
1216 | if (sec->ps_policy->sp_cops->kill_sec) { | |
1217 | sec->ps_policy->sp_cops->kill_sec(sec); | |
1218 | ||
1219 | sec_cop_flush_ctx_cache(sec, -1, 1, 1); | |
1220 | } | |
1221 | } | |
1222 | ||
be23ce1d | 1223 | static struct ptlrpc_sec *sptlrpc_sec_get(struct ptlrpc_sec *sec) |
d7e09d03 PT |
1224 | { |
1225 | if (sec) | |
1226 | atomic_inc(&sec->ps_refcount); | |
1227 | ||
1228 | return sec; | |
1229 | } | |
d7e09d03 PT |
1230 | |
1231 | void sptlrpc_sec_put(struct ptlrpc_sec *sec) | |
1232 | { | |
1233 | if (sec) { | |
1234 | LASSERT_ATOMIC_POS(&sec->ps_refcount); | |
1235 | ||
1236 | if (atomic_dec_and_test(&sec->ps_refcount)) { | |
1237 | sptlrpc_gc_del_sec(sec); | |
1238 | sec_cop_destroy_sec(sec); | |
1239 | } | |
1240 | } | |
1241 | } | |
1242 | EXPORT_SYMBOL(sptlrpc_sec_put); | |
1243 | ||
1244 | /* | |
0c2bc758 | 1245 | * policy module is responsible for taking reference of import |
d7e09d03 PT |
1246 | */ |
1247 | static | |
aff9d8e8 | 1248 | struct ptlrpc_sec *sptlrpc_sec_create(struct obd_import *imp, |
d0bfef31 CH |
1249 | struct ptlrpc_svc_ctx *svc_ctx, |
1250 | struct sptlrpc_flavor *sf, | |
1251 | enum lustre_sec_part sp) | |
d7e09d03 PT |
1252 | { |
1253 | struct ptlrpc_sec_policy *policy; | |
d0bfef31 CH |
1254 | struct ptlrpc_sec *sec; |
1255 | char str[32]; | |
d7e09d03 PT |
1256 | |
1257 | if (svc_ctx) { | |
1258 | LASSERT(imp->imp_dlm_fake == 1); | |
1259 | ||
1260 | CDEBUG(D_SEC, "%s %s: reverse sec using flavor %s\n", | |
1261 | imp->imp_obd->obd_type->typ_name, | |
1262 | imp->imp_obd->obd_name, | |
1263 | sptlrpc_flavor2name(sf, str, sizeof(str))); | |
1264 | ||
1265 | policy = sptlrpc_policy_get(svc_ctx->sc_policy); | |
1266 | sf->sf_flags |= PTLRPC_SEC_FL_REVERSE | PTLRPC_SEC_FL_ROOTONLY; | |
1267 | } else { | |
1268 | LASSERT(imp->imp_dlm_fake == 0); | |
1269 | ||
1270 | CDEBUG(D_SEC, "%s %s: select security flavor %s\n", | |
1271 | imp->imp_obd->obd_type->typ_name, | |
1272 | imp->imp_obd->obd_name, | |
1273 | sptlrpc_flavor2name(sf, str, sizeof(str))); | |
1274 | ||
1275 | policy = sptlrpc_wireflavor2policy(sf->sf_rpc); | |
1276 | if (!policy) { | |
1277 | CERROR("invalid flavor 0x%x\n", sf->sf_rpc); | |
0a3bdb00 | 1278 | return NULL; |
d7e09d03 PT |
1279 | } |
1280 | } | |
1281 | ||
1282 | sec = policy->sp_cops->create_sec(imp, svc_ctx, sf); | |
1283 | if (sec) { | |
1284 | atomic_inc(&sec->ps_refcount); | |
1285 | ||
1286 | sec->ps_part = sp; | |
1287 | ||
1288 | if (sec->ps_gc_interval && policy->sp_cops->gc_ctx) | |
1289 | sptlrpc_gc_add_sec(sec); | |
1290 | } else { | |
1291 | sptlrpc_policy_put(policy); | |
1292 | } | |
1293 | ||
0a3bdb00 | 1294 | return sec; |
d7e09d03 PT |
1295 | } |
1296 | ||
1297 | struct ptlrpc_sec *sptlrpc_import_sec_ref(struct obd_import *imp) | |
1298 | { | |
1299 | struct ptlrpc_sec *sec; | |
1300 | ||
1301 | spin_lock(&imp->imp_lock); | |
1302 | sec = sptlrpc_sec_get(imp->imp_sec); | |
1303 | spin_unlock(&imp->imp_lock); | |
1304 | ||
1305 | return sec; | |
1306 | } | |
1307 | EXPORT_SYMBOL(sptlrpc_import_sec_ref); | |
1308 | ||
1309 | static void sptlrpc_import_sec_install(struct obd_import *imp, | |
1310 | struct ptlrpc_sec *sec) | |
1311 | { | |
1312 | struct ptlrpc_sec *old_sec; | |
1313 | ||
1314 | LASSERT_ATOMIC_POS(&sec->ps_refcount); | |
1315 | ||
1316 | spin_lock(&imp->imp_lock); | |
1317 | old_sec = imp->imp_sec; | |
1318 | imp->imp_sec = sec; | |
1319 | spin_unlock(&imp->imp_lock); | |
1320 | ||
1321 | if (old_sec) { | |
1322 | sptlrpc_sec_kill(old_sec); | |
1323 | ||
1324 | /* balance the ref taken by this import */ | |
1325 | sptlrpc_sec_put(old_sec); | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | static inline | |
1330 | int flavor_equal(struct sptlrpc_flavor *sf1, struct sptlrpc_flavor *sf2) | |
1331 | { | |
1332 | return (memcmp(sf1, sf2, sizeof(*sf1)) == 0); | |
1333 | } | |
1334 | ||
1335 | static inline | |
1336 | void flavor_copy(struct sptlrpc_flavor *dst, struct sptlrpc_flavor *src) | |
1337 | { | |
1338 | *dst = *src; | |
1339 | } | |
1340 | ||
1341 | static void sptlrpc_import_sec_adapt_inplace(struct obd_import *imp, | |
1342 | struct ptlrpc_sec *sec, | |
1343 | struct sptlrpc_flavor *sf) | |
1344 | { | |
d0bfef31 | 1345 | char str1[32], str2[32]; |
d7e09d03 PT |
1346 | |
1347 | if (sec->ps_flvr.sf_flags != sf->sf_flags) | |
1348 | CDEBUG(D_SEC, "changing sec flags: %s -> %s\n", | |
1349 | sptlrpc_secflags2str(sec->ps_flvr.sf_flags, | |
1350 | str1, sizeof(str1)), | |
1351 | sptlrpc_secflags2str(sf->sf_flags, | |
1352 | str2, sizeof(str2))); | |
1353 | ||
1354 | spin_lock(&sec->ps_lock); | |
1355 | flavor_copy(&sec->ps_flvr, sf); | |
1356 | spin_unlock(&sec->ps_lock); | |
1357 | } | |
1358 | ||
1359 | /** | |
1360 | * To get an appropriate ptlrpc_sec for the \a imp, according to the current | |
1361 | * configuration. Upon called, imp->imp_sec may or may not be NULL. | |
1362 | * | |
1363 | * - regular import: \a svc_ctx should be NULL and \a flvr is ignored; | |
1364 | * - reverse import: \a svc_ctx and \a flvr are obtained from incoming request. | |
1365 | */ | |
1366 | int sptlrpc_import_sec_adapt(struct obd_import *imp, | |
1367 | struct ptlrpc_svc_ctx *svc_ctx, | |
1368 | struct sptlrpc_flavor *flvr) | |
1369 | { | |
d0bfef31 CH |
1370 | struct ptlrpc_connection *conn; |
1371 | struct sptlrpc_flavor sf; | |
1372 | struct ptlrpc_sec *sec, *newsec; | |
1373 | enum lustre_sec_part sp; | |
1374 | char str[24]; | |
1375 | int rc = 0; | |
d7e09d03 PT |
1376 | |
1377 | might_sleep(); | |
1378 | ||
8b382089 | 1379 | if (!imp) |
0a3bdb00 | 1380 | return 0; |
d7e09d03 PT |
1381 | |
1382 | conn = imp->imp_connection; | |
1383 | ||
8b382089 | 1384 | if (!svc_ctx) { |
d7e09d03 PT |
1385 | struct client_obd *cliobd = &imp->imp_obd->u.cli; |
1386 | /* | |
1387 | * normal import, determine flavor from rule set, except | |
1388 | * for mgc the flavor is predetermined. | |
1389 | */ | |
1390 | if (cliobd->cl_sp_me == LUSTRE_SP_MGC) | |
1391 | sf = cliobd->cl_flvr_mgc; | |
1392 | else | |
1393 | sptlrpc_conf_choose_flavor(cliobd->cl_sp_me, | |
1394 | cliobd->cl_sp_to, | |
1395 | &cliobd->cl_target_uuid, | |
1396 | conn->c_self, &sf); | |
1397 | ||
1398 | sp = imp->imp_obd->u.cli.cl_sp_me; | |
1399 | } else { | |
0c2bc758 | 1400 | /* reverse import, determine flavor from incoming request */ |
d7e09d03 PT |
1401 | sf = *flvr; |
1402 | ||
1403 | if (sf.sf_rpc != SPTLRPC_FLVR_NULL) | |
1404 | sf.sf_flags = PTLRPC_SEC_FL_REVERSE | | |
1405 | PTLRPC_SEC_FL_ROOTONLY; | |
1406 | ||
1407 | sp = sptlrpc_target_sec_part(imp->imp_obd); | |
1408 | } | |
1409 | ||
1410 | sec = sptlrpc_import_sec_ref(imp); | |
1411 | if (sec) { | |
d0bfef31 | 1412 | char str2[24]; |
d7e09d03 PT |
1413 | |
1414 | if (flavor_equal(&sf, &sec->ps_flvr)) | |
a9b3e8f3 | 1415 | goto out; |
d7e09d03 PT |
1416 | |
1417 | CDEBUG(D_SEC, "import %s->%s: changing flavor %s -> %s\n", | |
1418 | imp->imp_obd->obd_name, | |
1419 | obd_uuid2str(&conn->c_remote_uuid), | |
1420 | sptlrpc_flavor2name(&sec->ps_flvr, str, sizeof(str)), | |
1421 | sptlrpc_flavor2name(&sf, str2, sizeof(str2))); | |
1422 | ||
1423 | if (SPTLRPC_FLVR_POLICY(sf.sf_rpc) == | |
1424 | SPTLRPC_FLVR_POLICY(sec->ps_flvr.sf_rpc) && | |
1425 | SPTLRPC_FLVR_MECH(sf.sf_rpc) == | |
1426 | SPTLRPC_FLVR_MECH(sec->ps_flvr.sf_rpc)) { | |
1427 | sptlrpc_import_sec_adapt_inplace(imp, sec, &sf); | |
a9b3e8f3 | 1428 | goto out; |
d7e09d03 PT |
1429 | } |
1430 | } else if (SPTLRPC_FLVR_BASE(sf.sf_rpc) != | |
1431 | SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) { | |
1432 | CDEBUG(D_SEC, "import %s->%s netid %x: select flavor %s\n", | |
1433 | imp->imp_obd->obd_name, | |
1434 | obd_uuid2str(&conn->c_remote_uuid), | |
1435 | LNET_NIDNET(conn->c_self), | |
1436 | sptlrpc_flavor2name(&sf, str, sizeof(str))); | |
1437 | } | |
1438 | ||
1439 | mutex_lock(&imp->imp_sec_mutex); | |
1440 | ||
1441 | newsec = sptlrpc_sec_create(imp, svc_ctx, &sf, sp); | |
1442 | if (newsec) { | |
1443 | sptlrpc_import_sec_install(imp, newsec); | |
1444 | } else { | |
1445 | CERROR("import %s->%s: failed to create new sec\n", | |
1446 | imp->imp_obd->obd_name, | |
1447 | obd_uuid2str(&conn->c_remote_uuid)); | |
1448 | rc = -EPERM; | |
1449 | } | |
1450 | ||
1451 | mutex_unlock(&imp->imp_sec_mutex); | |
1452 | out: | |
1453 | sptlrpc_sec_put(sec); | |
0a3bdb00 | 1454 | return rc; |
d7e09d03 PT |
1455 | } |
1456 | ||
1457 | void sptlrpc_import_sec_put(struct obd_import *imp) | |
1458 | { | |
1459 | if (imp->imp_sec) { | |
1460 | sptlrpc_sec_kill(imp->imp_sec); | |
1461 | ||
1462 | sptlrpc_sec_put(imp->imp_sec); | |
1463 | imp->imp_sec = NULL; | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | static void import_flush_ctx_common(struct obd_import *imp, | |
1468 | uid_t uid, int grace, int force) | |
1469 | { | |
1470 | struct ptlrpc_sec *sec; | |
1471 | ||
8b382089 | 1472 | if (!imp) |
d7e09d03 PT |
1473 | return; |
1474 | ||
1475 | sec = sptlrpc_import_sec_ref(imp); | |
8b382089 | 1476 | if (!sec) |
d7e09d03 PT |
1477 | return; |
1478 | ||
1479 | sec_cop_flush_ctx_cache(sec, uid, grace, force); | |
1480 | sptlrpc_sec_put(sec); | |
1481 | } | |
1482 | ||
d7e09d03 PT |
1483 | void sptlrpc_import_flush_my_ctx(struct obd_import *imp) |
1484 | { | |
4b1a25f0 PT |
1485 | import_flush_ctx_common(imp, from_kuid(&init_user_ns, current_uid()), |
1486 | 1, 1); | |
d7e09d03 PT |
1487 | } |
1488 | EXPORT_SYMBOL(sptlrpc_import_flush_my_ctx); | |
1489 | ||
1490 | void sptlrpc_import_flush_all_ctx(struct obd_import *imp) | |
1491 | { | |
1492 | import_flush_ctx_common(imp, -1, 1, 1); | |
1493 | } | |
1494 | EXPORT_SYMBOL(sptlrpc_import_flush_all_ctx); | |
1495 | ||
1496 | /** | |
1497 | * Used by ptlrpc client to allocate request buffer of \a req. Upon return | |
1498 | * successfully, req->rq_reqmsg points to a buffer with size \a msgsize. | |
1499 | */ | |
1500 | int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize) | |
1501 | { | |
1502 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1503 | struct ptlrpc_sec_policy *policy; | |
1504 | int rc; | |
1505 | ||
1506 | LASSERT(ctx); | |
1507 | LASSERT(ctx->cc_sec); | |
1508 | LASSERT(ctx->cc_sec->ps_policy); | |
8b382089 | 1509 | LASSERT(!req->rq_reqmsg); |
d7e09d03 PT |
1510 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); |
1511 | ||
1512 | policy = ctx->cc_sec->ps_policy; | |
1513 | rc = policy->sp_cops->alloc_reqbuf(ctx->cc_sec, req, msgsize); | |
1514 | if (!rc) { | |
1515 | LASSERT(req->rq_reqmsg); | |
1516 | LASSERT(req->rq_reqbuf || req->rq_clrbuf); | |
1517 | ||
1518 | /* zeroing preallocated buffer */ | |
1519 | if (req->rq_pool) | |
1520 | memset(req->rq_reqmsg, 0, msgsize); | |
1521 | } | |
1522 | ||
1523 | return rc; | |
1524 | } | |
1525 | ||
1526 | /** | |
1527 | * Used by ptlrpc client to free request buffer of \a req. After this | |
1528 | * req->rq_reqmsg is set to NULL and should not be accessed anymore. | |
1529 | */ | |
1530 | void sptlrpc_cli_free_reqbuf(struct ptlrpc_request *req) | |
1531 | { | |
1532 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1533 | struct ptlrpc_sec_policy *policy; | |
1534 | ||
1535 | LASSERT(ctx); | |
1536 | LASSERT(ctx->cc_sec); | |
1537 | LASSERT(ctx->cc_sec->ps_policy); | |
1538 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); | |
1539 | ||
8b382089 | 1540 | if (!req->rq_reqbuf && !req->rq_clrbuf) |
d7e09d03 PT |
1541 | return; |
1542 | ||
1543 | policy = ctx->cc_sec->ps_policy; | |
1544 | policy->sp_cops->free_reqbuf(ctx->cc_sec, req); | |
1545 | req->rq_reqmsg = NULL; | |
1546 | } | |
1547 | ||
1548 | /* | |
1549 | * NOTE caller must guarantee the buffer size is enough for the enlargement | |
1550 | */ | |
1551 | void _sptlrpc_enlarge_msg_inplace(struct lustre_msg *msg, | |
1552 | int segment, int newsize) | |
1553 | { | |
d0bfef31 CH |
1554 | void *src, *dst; |
1555 | int oldsize, oldmsg_size, movesize; | |
d7e09d03 PT |
1556 | |
1557 | LASSERT(segment < msg->lm_bufcount); | |
1558 | LASSERT(msg->lm_buflens[segment] <= newsize); | |
1559 | ||
1560 | if (msg->lm_buflens[segment] == newsize) | |
1561 | return; | |
1562 | ||
1563 | /* nothing to do if we are enlarging the last segment */ | |
1564 | if (segment == msg->lm_bufcount - 1) { | |
1565 | msg->lm_buflens[segment] = newsize; | |
1566 | return; | |
1567 | } | |
1568 | ||
1569 | oldsize = msg->lm_buflens[segment]; | |
1570 | ||
1571 | src = lustre_msg_buf(msg, segment + 1, 0); | |
1572 | msg->lm_buflens[segment] = newsize; | |
1573 | dst = lustre_msg_buf(msg, segment + 1, 0); | |
1574 | msg->lm_buflens[segment] = oldsize; | |
1575 | ||
1576 | /* move from segment + 1 to end segment */ | |
1577 | LASSERT(msg->lm_magic == LUSTRE_MSG_MAGIC_V2); | |
1578 | oldmsg_size = lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens); | |
9797fb0e | 1579 | movesize = oldmsg_size - ((unsigned long)src - (unsigned long)msg); |
d7e09d03 PT |
1580 | LASSERT(movesize >= 0); |
1581 | ||
1582 | if (movesize) | |
1583 | memmove(dst, src, movesize); | |
1584 | ||
1585 | /* note we don't clear the ares where old data live, not secret */ | |
1586 | ||
1587 | /* finally set new segment size */ | |
1588 | msg->lm_buflens[segment] = newsize; | |
1589 | } | |
1590 | EXPORT_SYMBOL(_sptlrpc_enlarge_msg_inplace); | |
1591 | ||
1592 | /** | |
1593 | * Used by ptlrpc client to enlarge the \a segment of request message pointed | |
1594 | * by req->rq_reqmsg to size \a newsize, all previously filled-in data will be | |
1595 | * preserved after the enlargement. this must be called after original request | |
1596 | * buffer being allocated. | |
1597 | * | |
1598 | * \note after this be called, rq_reqmsg and rq_reqlen might have been changed, | |
1599 | * so caller should refresh its local pointers if needed. | |
1600 | */ | |
1601 | int sptlrpc_cli_enlarge_reqbuf(struct ptlrpc_request *req, | |
1602 | int segment, int newsize) | |
1603 | { | |
d0bfef31 CH |
1604 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
1605 | struct ptlrpc_sec_cops *cops; | |
1606 | struct lustre_msg *msg = req->rq_reqmsg; | |
d7e09d03 PT |
1607 | |
1608 | LASSERT(ctx); | |
1609 | LASSERT(msg); | |
1610 | LASSERT(msg->lm_bufcount > segment); | |
1611 | LASSERT(msg->lm_buflens[segment] <= newsize); | |
1612 | ||
1613 | if (msg->lm_buflens[segment] == newsize) | |
1614 | return 0; | |
1615 | ||
1616 | cops = ctx->cc_sec->ps_policy->sp_cops; | |
1617 | LASSERT(cops->enlarge_reqbuf); | |
1618 | return cops->enlarge_reqbuf(ctx->cc_sec, req, segment, newsize); | |
1619 | } | |
1620 | EXPORT_SYMBOL(sptlrpc_cli_enlarge_reqbuf); | |
1621 | ||
1622 | /** | |
1623 | * Used by ptlrpc client to allocate reply buffer of \a req. | |
1624 | * | |
1625 | * \note After this, req->rq_repmsg is still not accessible. | |
1626 | */ | |
1627 | int sptlrpc_cli_alloc_repbuf(struct ptlrpc_request *req, int msgsize) | |
1628 | { | |
1629 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1630 | struct ptlrpc_sec_policy *policy; | |
d7e09d03 PT |
1631 | |
1632 | LASSERT(ctx); | |
1633 | LASSERT(ctx->cc_sec); | |
1634 | LASSERT(ctx->cc_sec->ps_policy); | |
1635 | ||
1636 | if (req->rq_repbuf) | |
0a3bdb00 | 1637 | return 0; |
d7e09d03 PT |
1638 | |
1639 | policy = ctx->cc_sec->ps_policy; | |
0a3bdb00 | 1640 | return policy->sp_cops->alloc_repbuf(ctx->cc_sec, req, msgsize); |
d7e09d03 PT |
1641 | } |
1642 | ||
1643 | /** | |
1644 | * Used by ptlrpc client to free reply buffer of \a req. After this | |
1645 | * req->rq_repmsg is set to NULL and should not be accessed anymore. | |
1646 | */ | |
1647 | void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req) | |
1648 | { | |
1649 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1650 | struct ptlrpc_sec_policy *policy; | |
d7e09d03 PT |
1651 | |
1652 | LASSERT(ctx); | |
1653 | LASSERT(ctx->cc_sec); | |
1654 | LASSERT(ctx->cc_sec->ps_policy); | |
1655 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); | |
1656 | ||
8b382089 | 1657 | if (!req->rq_repbuf) |
d7e09d03 PT |
1658 | return; |
1659 | LASSERT(req->rq_repbuf_len); | |
1660 | ||
1661 | policy = ctx->cc_sec->ps_policy; | |
1662 | policy->sp_cops->free_repbuf(ctx->cc_sec, req); | |
1663 | req->rq_repmsg = NULL; | |
d7e09d03 PT |
1664 | } |
1665 | ||
be23ce1d SB |
1666 | static int sptlrpc_svc_install_rvs_ctx(struct obd_import *imp, |
1667 | struct ptlrpc_svc_ctx *ctx) | |
d7e09d03 PT |
1668 | { |
1669 | struct ptlrpc_sec_policy *policy = ctx->sc_policy; | |
1670 | ||
1671 | if (!policy->sp_sops->install_rctx) | |
1672 | return 0; | |
1673 | return policy->sp_sops->install_rctx(imp, ctx); | |
1674 | } | |
1675 | ||
1676 | /**************************************** | |
1677 | * server side security * | |
1678 | ****************************************/ | |
1679 | ||
1680 | static int flavor_allowed(struct sptlrpc_flavor *exp, | |
1681 | struct ptlrpc_request *req) | |
1682 | { | |
1683 | struct sptlrpc_flavor *flvr = &req->rq_flvr; | |
1684 | ||
1685 | if (exp->sf_rpc == SPTLRPC_FLVR_ANY || exp->sf_rpc == flvr->sf_rpc) | |
1686 | return 1; | |
1687 | ||
1688 | if ((req->rq_ctx_init || req->rq_ctx_fini) && | |
1689 | SPTLRPC_FLVR_POLICY(exp->sf_rpc) == | |
1690 | SPTLRPC_FLVR_POLICY(flvr->sf_rpc) && | |
1691 | SPTLRPC_FLVR_MECH(exp->sf_rpc) == SPTLRPC_FLVR_MECH(flvr->sf_rpc)) | |
1692 | return 1; | |
1693 | ||
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | #define EXP_FLVR_UPDATE_EXPIRE (OBD_TIMEOUT_DEFAULT + 10) | |
1698 | ||
1699 | /** | |
1700 | * Given an export \a exp, check whether the flavor of incoming \a req | |
1701 | * is allowed by the export \a exp. Main logic is about taking care of | |
1702 | * changing configurations. Return 0 means success. | |
1703 | */ | |
1704 | int sptlrpc_target_export_check(struct obd_export *exp, | |
1705 | struct ptlrpc_request *req) | |
1706 | { | |
d0bfef31 | 1707 | struct sptlrpc_flavor flavor; |
d7e09d03 | 1708 | |
8b382089 | 1709 | if (!exp) |
d7e09d03 PT |
1710 | return 0; |
1711 | ||
1712 | /* client side export has no imp_reverse, skip | |
dadfcdab OD |
1713 | * FIXME maybe we should check flavor this as well??? |
1714 | */ | |
8b382089 | 1715 | if (!exp->exp_imp_reverse) |
d7e09d03 PT |
1716 | return 0; |
1717 | ||
1718 | /* don't care about ctx fini rpc */ | |
1719 | if (req->rq_ctx_fini) | |
1720 | return 0; | |
1721 | ||
1722 | spin_lock(&exp->exp_lock); | |
1723 | ||
1724 | /* if flavor just changed (exp->exp_flvr_changed != 0), we wait for | |
1725 | * the first req with the new flavor, then treat it as current flavor, | |
1726 | * adapt reverse sec according to it. | |
1727 | * note the first rpc with new flavor might not be with root ctx, in | |
dadfcdab OD |
1728 | * which case delay the sec_adapt by leaving exp_flvr_adapt == 1. |
1729 | */ | |
d7e09d03 PT |
1730 | if (unlikely(exp->exp_flvr_changed) && |
1731 | flavor_allowed(&exp->exp_flvr_old[1], req)) { | |
1732 | /* make the new flavor as "current", and old ones as | |
dadfcdab OD |
1733 | * about-to-expire |
1734 | */ | |
d7e09d03 PT |
1735 | CDEBUG(D_SEC, "exp %p: just changed: %x->%x\n", exp, |
1736 | exp->exp_flvr.sf_rpc, exp->exp_flvr_old[1].sf_rpc); | |
1737 | flavor = exp->exp_flvr_old[1]; | |
1738 | exp->exp_flvr_old[1] = exp->exp_flvr_old[0]; | |
1739 | exp->exp_flvr_expire[1] = exp->exp_flvr_expire[0]; | |
1740 | exp->exp_flvr_old[0] = exp->exp_flvr; | |
986ef135 | 1741 | exp->exp_flvr_expire[0] = ktime_get_real_seconds() + |
d7e09d03 PT |
1742 | EXP_FLVR_UPDATE_EXPIRE; |
1743 | exp->exp_flvr = flavor; | |
1744 | ||
1745 | /* flavor change finished */ | |
1746 | exp->exp_flvr_changed = 0; | |
1747 | LASSERT(exp->exp_flvr_adapt == 1); | |
1748 | ||
1749 | /* if it's gss, we only interested in root ctx init */ | |
1750 | if (req->rq_auth_gss && | |
1751 | !(req->rq_ctx_init && | |
1752 | (req->rq_auth_usr_root || req->rq_auth_usr_mdt || | |
1753 | req->rq_auth_usr_ost))) { | |
1754 | spin_unlock(&exp->exp_lock); | |
1755 | CDEBUG(D_SEC, "is good but not root(%d:%d:%d:%d:%d)\n", | |
1756 | req->rq_auth_gss, req->rq_ctx_init, | |
1757 | req->rq_auth_usr_root, req->rq_auth_usr_mdt, | |
1758 | req->rq_auth_usr_ost); | |
1759 | return 0; | |
1760 | } | |
1761 | ||
1762 | exp->exp_flvr_adapt = 0; | |
1763 | spin_unlock(&exp->exp_lock); | |
1764 | ||
1765 | return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, | |
1766 | req->rq_svc_ctx, &flavor); | |
1767 | } | |
1768 | ||
1769 | /* if it equals to the current flavor, we accept it, but need to | |
dadfcdab OD |
1770 | * dealing with reverse sec/ctx |
1771 | */ | |
d7e09d03 PT |
1772 | if (likely(flavor_allowed(&exp->exp_flvr, req))) { |
1773 | /* most cases should return here, we only interested in | |
dadfcdab OD |
1774 | * gss root ctx init |
1775 | */ | |
d7e09d03 PT |
1776 | if (!req->rq_auth_gss || !req->rq_ctx_init || |
1777 | (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt && | |
1778 | !req->rq_auth_usr_ost)) { | |
1779 | spin_unlock(&exp->exp_lock); | |
1780 | return 0; | |
1781 | } | |
1782 | ||
1783 | /* if flavor just changed, we should not proceed, just leave | |
1784 | * it and current flavor will be discovered and replaced | |
dadfcdab OD |
1785 | * shortly, and let _this_ rpc pass through |
1786 | */ | |
d7e09d03 PT |
1787 | if (exp->exp_flvr_changed) { |
1788 | LASSERT(exp->exp_flvr_adapt); | |
1789 | spin_unlock(&exp->exp_lock); | |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | if (exp->exp_flvr_adapt) { | |
1794 | exp->exp_flvr_adapt = 0; | |
1795 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): do delayed adapt\n", | |
1796 | exp, exp->exp_flvr.sf_rpc, | |
1797 | exp->exp_flvr_old[0].sf_rpc, | |
1798 | exp->exp_flvr_old[1].sf_rpc); | |
1799 | flavor = exp->exp_flvr; | |
1800 | spin_unlock(&exp->exp_lock); | |
1801 | ||
1802 | return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, | |
1803 | req->rq_svc_ctx, | |
1804 | &flavor); | |
1805 | } else { | |
2d00bd17 JP |
1806 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): is current flavor, install rvs ctx\n", |
1807 | exp, exp->exp_flvr.sf_rpc, | |
d7e09d03 PT |
1808 | exp->exp_flvr_old[0].sf_rpc, |
1809 | exp->exp_flvr_old[1].sf_rpc); | |
1810 | spin_unlock(&exp->exp_lock); | |
1811 | ||
1812 | return sptlrpc_svc_install_rvs_ctx(exp->exp_imp_reverse, | |
1813 | req->rq_svc_ctx); | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | if (exp->exp_flvr_expire[0]) { | |
986ef135 | 1818 | if (exp->exp_flvr_expire[0] >= ktime_get_real_seconds()) { |
d7e09d03 | 1819 | if (flavor_allowed(&exp->exp_flvr_old[0], req)) { |
986ef135 | 1820 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the middle one (%lld)\n", exp, |
d7e09d03 PT |
1821 | exp->exp_flvr.sf_rpc, |
1822 | exp->exp_flvr_old[0].sf_rpc, | |
1823 | exp->exp_flvr_old[1].sf_rpc, | |
986ef135 AB |
1824 | (s64)(exp->exp_flvr_expire[0] - |
1825 | ktime_get_real_seconds())); | |
d7e09d03 PT |
1826 | spin_unlock(&exp->exp_lock); |
1827 | return 0; | |
1828 | } | |
1829 | } else { | |
1830 | CDEBUG(D_SEC, "mark middle expired\n"); | |
1831 | exp->exp_flvr_expire[0] = 0; | |
1832 | } | |
1833 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match middle\n", exp, | |
1834 | exp->exp_flvr.sf_rpc, | |
1835 | exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, | |
1836 | req->rq_flvr.sf_rpc); | |
1837 | } | |
1838 | ||
1839 | /* now it doesn't match the current flavor, the only chance we can | |
dadfcdab OD |
1840 | * accept it is match the old flavors which is not expired. |
1841 | */ | |
d7e09d03 | 1842 | if (exp->exp_flvr_changed == 0 && exp->exp_flvr_expire[1]) { |
986ef135 | 1843 | if (exp->exp_flvr_expire[1] >= ktime_get_real_seconds()) { |
d7e09d03 | 1844 | if (flavor_allowed(&exp->exp_flvr_old[1], req)) { |
986ef135 | 1845 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the oldest one (%lld)\n", |
2d00bd17 | 1846 | exp, |
d7e09d03 PT |
1847 | exp->exp_flvr.sf_rpc, |
1848 | exp->exp_flvr_old[0].sf_rpc, | |
1849 | exp->exp_flvr_old[1].sf_rpc, | |
986ef135 AB |
1850 | (s64)(exp->exp_flvr_expire[1] - |
1851 | ktime_get_real_seconds())); | |
d7e09d03 PT |
1852 | spin_unlock(&exp->exp_lock); |
1853 | return 0; | |
1854 | } | |
1855 | } else { | |
1856 | CDEBUG(D_SEC, "mark oldest expired\n"); | |
1857 | exp->exp_flvr_expire[1] = 0; | |
1858 | } | |
1859 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match found\n", | |
1860 | exp, exp->exp_flvr.sf_rpc, | |
1861 | exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, | |
1862 | req->rq_flvr.sf_rpc); | |
1863 | } else { | |
1864 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): skip the last one\n", | |
1865 | exp, exp->exp_flvr.sf_rpc, exp->exp_flvr_old[0].sf_rpc, | |
1866 | exp->exp_flvr_old[1].sf_rpc); | |
1867 | } | |
1868 | ||
1869 | spin_unlock(&exp->exp_lock); | |
1870 | ||
986ef135 | 1871 | CWARN("exp %p(%s): req %p (%u|%u|%u|%u|%u|%u) with unauthorized flavor %x, expect %x|%x(%+lld)|%x(%+lld)\n", |
d7e09d03 PT |
1872 | exp, exp->exp_obd->obd_name, |
1873 | req, req->rq_auth_gss, req->rq_ctx_init, req->rq_ctx_fini, | |
1874 | req->rq_auth_usr_root, req->rq_auth_usr_mdt, req->rq_auth_usr_ost, | |
1875 | req->rq_flvr.sf_rpc, | |
1876 | exp->exp_flvr.sf_rpc, | |
1877 | exp->exp_flvr_old[0].sf_rpc, | |
1878 | exp->exp_flvr_expire[0] ? | |
986ef135 | 1879 | (s64)(exp->exp_flvr_expire[0] - ktime_get_real_seconds()) : 0, |
d7e09d03 PT |
1880 | exp->exp_flvr_old[1].sf_rpc, |
1881 | exp->exp_flvr_expire[1] ? | |
986ef135 | 1882 | (s64)(exp->exp_flvr_expire[1] - ktime_get_real_seconds()) : 0); |
d7e09d03 PT |
1883 | return -EACCES; |
1884 | } | |
1885 | EXPORT_SYMBOL(sptlrpc_target_export_check); | |
1886 | ||
d7e09d03 PT |
1887 | static int sptlrpc_svc_check_from(struct ptlrpc_request *req, int svc_rc) |
1888 | { | |
1889 | /* peer's claim is unreliable unless gss is being used */ | |
1890 | if (!req->rq_auth_gss || svc_rc == SECSVC_DROP) | |
1891 | return svc_rc; | |
1892 | ||
1893 | switch (req->rq_sp_from) { | |
1894 | case LUSTRE_SP_CLI: | |
1895 | if (req->rq_auth_usr_mdt || req->rq_auth_usr_ost) { | |
1896 | DEBUG_REQ(D_ERROR, req, "faked source CLI"); | |
1897 | svc_rc = SECSVC_DROP; | |
1898 | } | |
1899 | break; | |
1900 | case LUSTRE_SP_MDT: | |
1901 | if (!req->rq_auth_usr_mdt) { | |
1902 | DEBUG_REQ(D_ERROR, req, "faked source MDT"); | |
1903 | svc_rc = SECSVC_DROP; | |
1904 | } | |
1905 | break; | |
1906 | case LUSTRE_SP_OST: | |
1907 | if (!req->rq_auth_usr_ost) { | |
1908 | DEBUG_REQ(D_ERROR, req, "faked source OST"); | |
1909 | svc_rc = SECSVC_DROP; | |
1910 | } | |
1911 | break; | |
1912 | case LUSTRE_SP_MGS: | |
1913 | case LUSTRE_SP_MGC: | |
1914 | if (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt && | |
1915 | !req->rq_auth_usr_ost) { | |
1916 | DEBUG_REQ(D_ERROR, req, "faked source MGC/MGS"); | |
1917 | svc_rc = SECSVC_DROP; | |
1918 | } | |
1919 | break; | |
1920 | case LUSTRE_SP_ANY: | |
1921 | default: | |
1922 | DEBUG_REQ(D_ERROR, req, "invalid source %u", req->rq_sp_from); | |
1923 | svc_rc = SECSVC_DROP; | |
1924 | } | |
1925 | ||
1926 | return svc_rc; | |
1927 | } | |
1928 | ||
1929 | /** | |
1930 | * Used by ptlrpc server, to perform transformation upon request message of | |
1931 | * incoming \a req. This must be the first thing to do with a incoming | |
1932 | * request in ptlrpc layer. | |
1933 | * | |
1934 | * \retval SECSVC_OK success, and req->rq_reqmsg point to request message in | |
1935 | * clear text, size is req->rq_reqlen; also req->rq_svc_ctx is set. | |
1936 | * \retval SECSVC_COMPLETE success, the request has been fully processed, and | |
1937 | * reply message has been prepared. | |
1938 | * \retval SECSVC_DROP failed, this request should be dropped. | |
1939 | */ | |
1940 | int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req) | |
1941 | { | |
1942 | struct ptlrpc_sec_policy *policy; | |
d0bfef31 CH |
1943 | struct lustre_msg *msg = req->rq_reqbuf; |
1944 | int rc; | |
d7e09d03 PT |
1945 | |
1946 | LASSERT(msg); | |
8b382089 OD |
1947 | LASSERT(!req->rq_reqmsg); |
1948 | LASSERT(!req->rq_repmsg); | |
1949 | LASSERT(!req->rq_svc_ctx); | |
d7e09d03 PT |
1950 | |
1951 | req->rq_req_swab_mask = 0; | |
1952 | ||
1953 | rc = __lustre_unpack_msg(msg, req->rq_reqdata_len); | |
1954 | switch (rc) { | |
1955 | case 1: | |
1956 | lustre_set_req_swabbed(req, MSG_PTLRPC_HEADER_OFF); | |
1957 | case 0: | |
1958 | break; | |
1959 | default: | |
b0f5aad5 | 1960 | CERROR("error unpacking request from %s x%llu\n", |
d7e09d03 | 1961 | libcfs_id2str(req->rq_peer), req->rq_xid); |
0a3bdb00 | 1962 | return SECSVC_DROP; |
d7e09d03 PT |
1963 | } |
1964 | ||
1965 | req->rq_flvr.sf_rpc = WIRE_FLVR(msg->lm_secflvr); | |
1966 | req->rq_sp_from = LUSTRE_SP_ANY; | |
4b1a25f0 PT |
1967 | req->rq_auth_uid = -1; |
1968 | req->rq_auth_mapped_uid = -1; | |
d7e09d03 PT |
1969 | |
1970 | policy = sptlrpc_wireflavor2policy(req->rq_flvr.sf_rpc); | |
1971 | if (!policy) { | |
1972 | CERROR("unsupported rpc flavor %x\n", req->rq_flvr.sf_rpc); | |
0a3bdb00 | 1973 | return SECSVC_DROP; |
d7e09d03 PT |
1974 | } |
1975 | ||
1976 | LASSERT(policy->sp_sops->accept); | |
1977 | rc = policy->sp_sops->accept(req); | |
1978 | sptlrpc_policy_put(policy); | |
1979 | LASSERT(req->rq_reqmsg || rc != SECSVC_OK); | |
1980 | LASSERT(req->rq_svc_ctx || rc == SECSVC_DROP); | |
1981 | ||
1982 | /* | |
1983 | * if it's not null flavor (which means embedded packing msg), | |
0c2bc758 | 1984 | * reset the swab mask for the coming inner msg unpacking. |
d7e09d03 PT |
1985 | */ |
1986 | if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL) | |
1987 | req->rq_req_swab_mask = 0; | |
1988 | ||
1989 | /* sanity check for the request source */ | |
1990 | rc = sptlrpc_svc_check_from(req, rc); | |
0a3bdb00 | 1991 | return rc; |
d7e09d03 PT |
1992 | } |
1993 | ||
1994 | /** | |
1995 | * Used by ptlrpc server, to allocate reply buffer for \a req. If succeed, | |
1996 | * req->rq_reply_state is set, and req->rq_reply_state->rs_msg point to | |
1997 | * a buffer of \a msglen size. | |
1998 | */ | |
1999 | int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, int msglen) | |
2000 | { | |
2001 | struct ptlrpc_sec_policy *policy; | |
2002 | struct ptlrpc_reply_state *rs; | |
2003 | int rc; | |
d7e09d03 PT |
2004 | |
2005 | LASSERT(req->rq_svc_ctx); | |
2006 | LASSERT(req->rq_svc_ctx->sc_policy); | |
2007 | ||
2008 | policy = req->rq_svc_ctx->sc_policy; | |
2009 | LASSERT(policy->sp_sops->alloc_rs); | |
2010 | ||
2011 | rc = policy->sp_sops->alloc_rs(req, msglen); | |
2012 | if (unlikely(rc == -ENOMEM)) { | |
a34041af | 2013 | struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt; |
50ffcb7e | 2014 | |
a34041af PF |
2015 | if (svcpt->scp_service->srv_max_reply_size < |
2016 | msglen + sizeof(struct ptlrpc_reply_state)) { | |
2017 | /* Just return failure if the size is too big */ | |
19b2056f | 2018 | CERROR("size of message is too big (%zd), %d allowed\n", |
30c0aa39 OD |
2019 | msglen + sizeof(struct ptlrpc_reply_state), |
2020 | svcpt->scp_service->srv_max_reply_size); | |
a34041af PF |
2021 | return -ENOMEM; |
2022 | } | |
2023 | ||
d7e09d03 | 2024 | /* failed alloc, try emergency pool */ |
a34041af | 2025 | rs = lustre_get_emerg_rs(svcpt); |
8b382089 | 2026 | if (!rs) |
0a3bdb00 | 2027 | return -ENOMEM; |
d7e09d03 PT |
2028 | |
2029 | req->rq_reply_state = rs; | |
2030 | rc = policy->sp_sops->alloc_rs(req, msglen); | |
2031 | if (rc) { | |
2032 | lustre_put_emerg_rs(rs); | |
2033 | req->rq_reply_state = NULL; | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | LASSERT(rc != 0 || | |
2038 | (req->rq_reply_state && req->rq_reply_state->rs_msg)); | |
2039 | ||
0a3bdb00 | 2040 | return rc; |
d7e09d03 PT |
2041 | } |
2042 | ||
2043 | /** | |
2044 | * Used by ptlrpc server, to perform transformation upon reply message. | |
2045 | * | |
0c2bc758 | 2046 | * \post req->rq_reply_off is set to appropriate server-controlled reply offset. |
d7e09d03 PT |
2047 | * \post req->rq_repmsg and req->rq_reply_state->rs_msg becomes inaccessible. |
2048 | */ | |
2049 | int sptlrpc_svc_wrap_reply(struct ptlrpc_request *req) | |
2050 | { | |
2051 | struct ptlrpc_sec_policy *policy; | |
2052 | int rc; | |
d7e09d03 PT |
2053 | |
2054 | LASSERT(req->rq_svc_ctx); | |
2055 | LASSERT(req->rq_svc_ctx->sc_policy); | |
2056 | ||
2057 | policy = req->rq_svc_ctx->sc_policy; | |
2058 | LASSERT(policy->sp_sops->authorize); | |
2059 | ||
2060 | rc = policy->sp_sops->authorize(req); | |
2061 | LASSERT(rc || req->rq_reply_state->rs_repdata_len); | |
2062 | ||
0a3bdb00 | 2063 | return rc; |
d7e09d03 PT |
2064 | } |
2065 | ||
2066 | /** | |
2067 | * Used by ptlrpc server, to free reply_state. | |
2068 | */ | |
2069 | void sptlrpc_svc_free_rs(struct ptlrpc_reply_state *rs) | |
2070 | { | |
2071 | struct ptlrpc_sec_policy *policy; | |
2072 | unsigned int prealloc; | |
d7e09d03 PT |
2073 | |
2074 | LASSERT(rs->rs_svc_ctx); | |
2075 | LASSERT(rs->rs_svc_ctx->sc_policy); | |
2076 | ||
2077 | policy = rs->rs_svc_ctx->sc_policy; | |
2078 | LASSERT(policy->sp_sops->free_rs); | |
2079 | ||
2080 | prealloc = rs->rs_prealloc; | |
2081 | policy->sp_sops->free_rs(rs); | |
2082 | ||
2083 | if (prealloc) | |
2084 | lustre_put_emerg_rs(rs); | |
d7e09d03 PT |
2085 | } |
2086 | ||
2087 | void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req) | |
2088 | { | |
2089 | struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx; | |
2090 | ||
8b382089 | 2091 | if (ctx) |
d7e09d03 PT |
2092 | atomic_inc(&ctx->sc_refcount); |
2093 | } | |
2094 | ||
2095 | void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req) | |
2096 | { | |
2097 | struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx; | |
2098 | ||
8b382089 | 2099 | if (!ctx) |
d7e09d03 PT |
2100 | return; |
2101 | ||
2102 | LASSERT_ATOMIC_POS(&ctx->sc_refcount); | |
2103 | if (atomic_dec_and_test(&ctx->sc_refcount)) { | |
2104 | if (ctx->sc_policy->sp_sops->free_ctx) | |
2105 | ctx->sc_policy->sp_sops->free_ctx(ctx); | |
2106 | } | |
2107 | req->rq_svc_ctx = NULL; | |
2108 | } | |
2109 | ||
d7e09d03 PT |
2110 | /**************************************** |
2111 | * bulk security * | |
2112 | ****************************************/ | |
2113 | ||
2114 | /** | |
2115 | * Perform transformation upon bulk data pointed by \a desc. This is called | |
2116 | * before transforming the request message. | |
2117 | */ | |
2118 | int sptlrpc_cli_wrap_bulk(struct ptlrpc_request *req, | |
2119 | struct ptlrpc_bulk_desc *desc) | |
2120 | { | |
2121 | struct ptlrpc_cli_ctx *ctx; | |
2122 | ||
2123 | LASSERT(req->rq_bulk_read || req->rq_bulk_write); | |
2124 | ||
2125 | if (!req->rq_pack_bulk) | |
2126 | return 0; | |
2127 | ||
2128 | ctx = req->rq_cli_ctx; | |
2129 | if (ctx->cc_ops->wrap_bulk) | |
2130 | return ctx->cc_ops->wrap_bulk(ctx, req, desc); | |
2131 | return 0; | |
2132 | } | |
2133 | EXPORT_SYMBOL(sptlrpc_cli_wrap_bulk); | |
2134 | ||
2135 | /** | |
2136 | * This is called after unwrap the reply message. | |
2137 | * return nob of actual plain text size received, or error code. | |
2138 | */ | |
2139 | int sptlrpc_cli_unwrap_bulk_read(struct ptlrpc_request *req, | |
2140 | struct ptlrpc_bulk_desc *desc, | |
2141 | int nob) | |
2142 | { | |
d0bfef31 CH |
2143 | struct ptlrpc_cli_ctx *ctx; |
2144 | int rc; | |
d7e09d03 PT |
2145 | |
2146 | LASSERT(req->rq_bulk_read && !req->rq_bulk_write); | |
2147 | ||
2148 | if (!req->rq_pack_bulk) | |
2149 | return desc->bd_nob_transferred; | |
2150 | ||
2151 | ctx = req->rq_cli_ctx; | |
2152 | if (ctx->cc_ops->unwrap_bulk) { | |
2153 | rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); | |
2154 | if (rc < 0) | |
2155 | return rc; | |
2156 | } | |
2157 | return desc->bd_nob_transferred; | |
2158 | } | |
2159 | EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_read); | |
2160 | ||
2161 | /** | |
2162 | * This is called after unwrap the reply message. | |
2163 | * return 0 for success or error code. | |
2164 | */ | |
2165 | int sptlrpc_cli_unwrap_bulk_write(struct ptlrpc_request *req, | |
2166 | struct ptlrpc_bulk_desc *desc) | |
2167 | { | |
d0bfef31 CH |
2168 | struct ptlrpc_cli_ctx *ctx; |
2169 | int rc; | |
d7e09d03 PT |
2170 | |
2171 | LASSERT(!req->rq_bulk_read && req->rq_bulk_write); | |
2172 | ||
2173 | if (!req->rq_pack_bulk) | |
2174 | return 0; | |
2175 | ||
2176 | ctx = req->rq_cli_ctx; | |
2177 | if (ctx->cc_ops->unwrap_bulk) { | |
2178 | rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); | |
2179 | if (rc < 0) | |
2180 | return rc; | |
2181 | } | |
2182 | ||
2183 | /* | |
2184 | * if everything is going right, nob should equals to nob_transferred. | |
2185 | * in case of privacy mode, nob_transferred needs to be adjusted. | |
2186 | */ | |
2187 | if (desc->bd_nob != desc->bd_nob_transferred) { | |
19b2056f | 2188 | CERROR("nob %d doesn't match transferred nob %d\n", |
d7e09d03 PT |
2189 | desc->bd_nob, desc->bd_nob_transferred); |
2190 | return -EPROTO; | |
2191 | } | |
2192 | ||
2193 | return 0; | |
2194 | } | |
2195 | EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_write); | |
2196 | ||
d7e09d03 PT |
2197 | /**************************************** |
2198 | * user descriptor helpers * | |
2199 | ****************************************/ | |
2200 | ||
2201 | int sptlrpc_current_user_desc_size(void) | |
2202 | { | |
2203 | int ngroups; | |
2204 | ||
2205 | ngroups = current_ngroups; | |
2206 | ||
2207 | if (ngroups > LUSTRE_MAX_GROUPS) | |
2208 | ngroups = LUSTRE_MAX_GROUPS; | |
2209 | return sptlrpc_user_desc_size(ngroups); | |
2210 | } | |
2211 | EXPORT_SYMBOL(sptlrpc_current_user_desc_size); | |
2212 | ||
2213 | int sptlrpc_pack_user_desc(struct lustre_msg *msg, int offset) | |
2214 | { | |
2215 | struct ptlrpc_user_desc *pud; | |
2216 | ||
2217 | pud = lustre_msg_buf(msg, offset, 0); | |
2218 | ||
db3c16cd LL |
2219 | if (!pud) |
2220 | return -EINVAL; | |
2221 | ||
4b1a25f0 PT |
2222 | pud->pud_uid = from_kuid(&init_user_ns, current_uid()); |
2223 | pud->pud_gid = from_kgid(&init_user_ns, current_gid()); | |
2224 | pud->pud_fsuid = from_kuid(&init_user_ns, current_fsuid()); | |
2225 | pud->pud_fsgid = from_kgid(&init_user_ns, current_fsgid()); | |
d7e09d03 PT |
2226 | pud->pud_cap = cfs_curproc_cap_pack(); |
2227 | pud->pud_ngroups = (msg->lm_buflens[offset] - sizeof(*pud)) / 4; | |
2228 | ||
2229 | task_lock(current); | |
2230 | if (pud->pud_ngroups > current_ngroups) | |
2231 | pud->pud_ngroups = current_ngroups; | |
81243eac | 2232 | memcpy(pud->pud_groups, current_cred()->group_info->gid, |
d7e09d03 PT |
2233 | pud->pud_ngroups * sizeof(__u32)); |
2234 | task_unlock(current); | |
2235 | ||
2236 | return 0; | |
2237 | } | |
2238 | EXPORT_SYMBOL(sptlrpc_pack_user_desc); | |
2239 | ||
2240 | int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset, int swabbed) | |
2241 | { | |
2242 | struct ptlrpc_user_desc *pud; | |
d0bfef31 | 2243 | int i; |
d7e09d03 PT |
2244 | |
2245 | pud = lustre_msg_buf(msg, offset, sizeof(*pud)); | |
2246 | if (!pud) | |
2247 | return -EINVAL; | |
2248 | ||
2249 | if (swabbed) { | |
2250 | __swab32s(&pud->pud_uid); | |
2251 | __swab32s(&pud->pud_gid); | |
2252 | __swab32s(&pud->pud_fsuid); | |
2253 | __swab32s(&pud->pud_fsgid); | |
2254 | __swab32s(&pud->pud_cap); | |
2255 | __swab32s(&pud->pud_ngroups); | |
2256 | } | |
2257 | ||
2258 | if (pud->pud_ngroups > LUSTRE_MAX_GROUPS) { | |
2259 | CERROR("%u groups is too large\n", pud->pud_ngroups); | |
2260 | return -EINVAL; | |
2261 | } | |
2262 | ||
2263 | if (sizeof(*pud) + pud->pud_ngroups * sizeof(__u32) > | |
2264 | msg->lm_buflens[offset]) { | |
2265 | CERROR("%u groups are claimed but bufsize only %u\n", | |
2266 | pud->pud_ngroups, msg->lm_buflens[offset]); | |
2267 | return -EINVAL; | |
2268 | } | |
2269 | ||
2270 | if (swabbed) { | |
2271 | for (i = 0; i < pud->pud_ngroups; i++) | |
2272 | __swab32s(&pud->pud_groups[i]); | |
2273 | } | |
2274 | ||
2275 | return 0; | |
2276 | } | |
2277 | EXPORT_SYMBOL(sptlrpc_unpack_user_desc); | |
2278 | ||
2279 | /**************************************** | |
2280 | * misc helpers * | |
2281 | ****************************************/ | |
2282 | ||
aff9d8e8 | 2283 | const char *sec2target_str(struct ptlrpc_sec *sec) |
d7e09d03 PT |
2284 | { |
2285 | if (!sec || !sec->ps_import || !sec->ps_import->imp_obd) | |
2286 | return "*"; | |
2287 | if (sec_is_reverse(sec)) | |
2288 | return "c"; | |
2289 | return obd_uuid2str(&sec->ps_import->imp_obd->u.cli.cl_target_uuid); | |
2290 | } | |
2291 | EXPORT_SYMBOL(sec2target_str); | |
2292 | ||
2293 | /* | |
2294 | * return true if the bulk data is protected | |
2295 | */ | |
316bd5e0 | 2296 | bool sptlrpc_flavor_has_bulk(struct sptlrpc_flavor *flvr) |
d7e09d03 PT |
2297 | { |
2298 | switch (SPTLRPC_FLVR_BULK_SVC(flvr->sf_rpc)) { | |
2299 | case SPTLRPC_BULK_SVC_INTG: | |
2300 | case SPTLRPC_BULK_SVC_PRIV: | |
316bd5e0 | 2301 | return true; |
d7e09d03 | 2302 | default: |
316bd5e0 | 2303 | return false; |
d7e09d03 PT |
2304 | } |
2305 | } | |
2306 | EXPORT_SYMBOL(sptlrpc_flavor_has_bulk); | |
2307 | ||
2308 | /**************************************** | |
2309 | * crypto API helper/alloc blkciper * | |
2310 | ****************************************/ | |
2311 | ||
2312 | /**************************************** | |
2313 | * initialize/finalize * | |
2314 | ****************************************/ | |
2315 | ||
2316 | int sptlrpc_init(void) | |
2317 | { | |
2318 | int rc; | |
2319 | ||
2320 | rwlock_init(&policy_lock); | |
2321 | ||
2322 | rc = sptlrpc_gc_init(); | |
2323 | if (rc) | |
2324 | goto out; | |
2325 | ||
2326 | rc = sptlrpc_conf_init(); | |
2327 | if (rc) | |
2328 | goto out_gc; | |
2329 | ||
2330 | rc = sptlrpc_enc_pool_init(); | |
2331 | if (rc) | |
2332 | goto out_conf; | |
2333 | ||
2334 | rc = sptlrpc_null_init(); | |
2335 | if (rc) | |
2336 | goto out_pool; | |
2337 | ||
2338 | rc = sptlrpc_plain_init(); | |
2339 | if (rc) | |
2340 | goto out_null; | |
2341 | ||
2342 | rc = sptlrpc_lproc_init(); | |
2343 | if (rc) | |
2344 | goto out_plain; | |
2345 | ||
2346 | return 0; | |
2347 | ||
2348 | out_plain: | |
2349 | sptlrpc_plain_fini(); | |
2350 | out_null: | |
2351 | sptlrpc_null_fini(); | |
2352 | out_pool: | |
2353 | sptlrpc_enc_pool_fini(); | |
2354 | out_conf: | |
2355 | sptlrpc_conf_fini(); | |
2356 | out_gc: | |
2357 | sptlrpc_gc_fini(); | |
2358 | out: | |
2359 | return rc; | |
2360 | } | |
2361 | ||
2362 | void sptlrpc_fini(void) | |
2363 | { | |
2364 | sptlrpc_lproc_fini(); | |
2365 | sptlrpc_plain_fini(); | |
2366 | sptlrpc_null_fini(); | |
2367 | sptlrpc_enc_pool_fini(); | |
2368 | sptlrpc_conf_fini(); | |
2369 | sptlrpc_gc_fini(); | |
2370 | } |