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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 | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2011, 2012, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * lustre/ptlrpc/sec.c | |
37 | * | |
38 | * Author: Eric Mei <ericm@clusterfs.com> | |
39 | */ | |
40 | ||
41 | #define DEBUG_SUBSYSTEM S_SEC | |
42 | ||
9fdaf8c0 | 43 | #include "../../include/linux/libcfs/libcfs.h" |
d7e09d03 PT |
44 | #include <linux/crypto.h> |
45 | #include <linux/key.h> | |
46 | ||
e27db149 GKH |
47 | #include "../include/obd.h" |
48 | #include "../include/obd_class.h" | |
49 | #include "../include/obd_support.h" | |
50 | #include "../include/lustre_net.h" | |
51 | #include "../include/lustre_import.h" | |
52 | #include "../include/lustre_dlm.h" | |
53 | #include "../include/lustre_sec.h" | |
d7e09d03 PT |
54 | |
55 | #include "ptlrpc_internal.h" | |
56 | ||
57 | /*********************************************** | |
58 | * policy registers * | |
59 | ***********************************************/ | |
60 | ||
61 | static rwlock_t policy_lock; | |
62 | static struct ptlrpc_sec_policy *policies[SPTLRPC_POLICY_MAX] = { | |
63 | NULL, | |
64 | }; | |
65 | ||
66 | int sptlrpc_register_policy(struct ptlrpc_sec_policy *policy) | |
67 | { | |
68 | __u16 number = policy->sp_policy; | |
69 | ||
70 | LASSERT(policy->sp_name); | |
71 | LASSERT(policy->sp_cops); | |
72 | LASSERT(policy->sp_sops); | |
73 | ||
74 | if (number >= SPTLRPC_POLICY_MAX) | |
75 | return -EINVAL; | |
76 | ||
77 | write_lock(&policy_lock); | |
78 | if (unlikely(policies[number])) { | |
79 | write_unlock(&policy_lock); | |
80 | return -EALREADY; | |
81 | } | |
82 | policies[number] = policy; | |
83 | write_unlock(&policy_lock); | |
84 | ||
85 | CDEBUG(D_SEC, "%s: registered\n", policy->sp_name); | |
86 | return 0; | |
87 | } | |
88 | EXPORT_SYMBOL(sptlrpc_register_policy); | |
89 | ||
90 | int sptlrpc_unregister_policy(struct ptlrpc_sec_policy *policy) | |
91 | { | |
92 | __u16 number = policy->sp_policy; | |
93 | ||
94 | LASSERT(number < SPTLRPC_POLICY_MAX); | |
95 | ||
96 | write_lock(&policy_lock); | |
97 | if (unlikely(policies[number] == NULL)) { | |
98 | write_unlock(&policy_lock); | |
99 | CERROR("%s: already unregistered\n", policy->sp_name); | |
100 | return -EINVAL; | |
101 | } | |
102 | ||
103 | LASSERT(policies[number] == policy); | |
104 | policies[number] = NULL; | |
105 | write_unlock(&policy_lock); | |
106 | ||
107 | CDEBUG(D_SEC, "%s: unregistered\n", policy->sp_name); | |
108 | return 0; | |
109 | } | |
110 | EXPORT_SYMBOL(sptlrpc_unregister_policy); | |
111 | ||
112 | static | |
aff9d8e8 | 113 | struct ptlrpc_sec_policy *sptlrpc_wireflavor2policy(__u32 flavor) |
d7e09d03 PT |
114 | { |
115 | static DEFINE_MUTEX(load_mutex); | |
d0bfef31 | 116 | static atomic_t loaded = ATOMIC_INIT(0); |
d7e09d03 | 117 | struct ptlrpc_sec_policy *policy; |
d0bfef31 CH |
118 | __u16 number = SPTLRPC_FLVR_POLICY(flavor); |
119 | __u16 flag = 0; | |
d7e09d03 PT |
120 | |
121 | if (number >= SPTLRPC_POLICY_MAX) | |
122 | return NULL; | |
123 | ||
124 | while (1) { | |
125 | read_lock(&policy_lock); | |
126 | policy = policies[number]; | |
127 | if (policy && !try_module_get(policy->sp_owner)) | |
128 | policy = NULL; | |
129 | if (policy == NULL) | |
130 | flag = atomic_read(&loaded); | |
131 | read_unlock(&policy_lock); | |
132 | ||
133 | if (policy != NULL || flag != 0 || | |
134 | number != SPTLRPC_POLICY_GSS) | |
135 | break; | |
136 | ||
137 | /* try to load gss module, once */ | |
138 | mutex_lock(&load_mutex); | |
139 | if (atomic_read(&loaded) == 0) { | |
140 | if (request_module("ptlrpc_gss") == 0) | |
141 | CDEBUG(D_SEC, | |
142 | "module ptlrpc_gss loaded on demand\n"); | |
143 | else | |
144 | CERROR("Unable to load module ptlrpc_gss\n"); | |
145 | ||
146 | atomic_set(&loaded, 1); | |
147 | } | |
148 | mutex_unlock(&load_mutex); | |
149 | } | |
150 | ||
151 | return policy; | |
152 | } | |
153 | ||
154 | __u32 sptlrpc_name2flavor_base(const char *name) | |
155 | { | |
156 | if (!strcmp(name, "null")) | |
157 | return SPTLRPC_FLVR_NULL; | |
158 | if (!strcmp(name, "plain")) | |
159 | return SPTLRPC_FLVR_PLAIN; | |
160 | if (!strcmp(name, "krb5n")) | |
161 | return SPTLRPC_FLVR_KRB5N; | |
162 | if (!strcmp(name, "krb5a")) | |
163 | return SPTLRPC_FLVR_KRB5A; | |
164 | if (!strcmp(name, "krb5i")) | |
165 | return SPTLRPC_FLVR_KRB5I; | |
166 | if (!strcmp(name, "krb5p")) | |
167 | return SPTLRPC_FLVR_KRB5P; | |
168 | ||
169 | return SPTLRPC_FLVR_INVALID; | |
170 | } | |
171 | EXPORT_SYMBOL(sptlrpc_name2flavor_base); | |
172 | ||
173 | const char *sptlrpc_flavor2name_base(__u32 flvr) | |
174 | { | |
175 | __u32 base = SPTLRPC_FLVR_BASE(flvr); | |
176 | ||
177 | if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) | |
178 | return "null"; | |
179 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_PLAIN)) | |
180 | return "plain"; | |
181 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5N)) | |
182 | return "krb5n"; | |
183 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5A)) | |
184 | return "krb5a"; | |
185 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5I)) | |
186 | return "krb5i"; | |
187 | else if (base == SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_KRB5P)) | |
188 | return "krb5p"; | |
189 | ||
190 | CERROR("invalid wire flavor 0x%x\n", flvr); | |
191 | return "invalid"; | |
192 | } | |
193 | EXPORT_SYMBOL(sptlrpc_flavor2name_base); | |
194 | ||
195 | char *sptlrpc_flavor2name_bulk(struct sptlrpc_flavor *sf, | |
196 | char *buf, int bufsize) | |
197 | { | |
198 | if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) | |
199 | snprintf(buf, bufsize, "hash:%s", | |
200 | sptlrpc_get_hash_name(sf->u_bulk.hash.hash_alg)); | |
201 | else | |
202 | snprintf(buf, bufsize, "%s", | |
203 | sptlrpc_flavor2name_base(sf->sf_rpc)); | |
204 | ||
205 | buf[bufsize - 1] = '\0'; | |
206 | return buf; | |
207 | } | |
208 | EXPORT_SYMBOL(sptlrpc_flavor2name_bulk); | |
209 | ||
210 | char *sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize) | |
211 | { | |
22e1dd69 | 212 | strlcpy(buf, sptlrpc_flavor2name_base(sf->sf_rpc), bufsize); |
d7e09d03 PT |
213 | |
214 | /* | |
215 | * currently we don't support customized bulk specification for | |
216 | * flavors other than plain | |
217 | */ | |
218 | if (SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN) { | |
219 | char bspec[16]; | |
220 | ||
221 | bspec[0] = '-'; | |
222 | sptlrpc_flavor2name_bulk(sf, &bspec[1], sizeof(bspec) - 1); | |
22e1dd69 | 223 | strlcat(buf, bspec, bufsize); |
d7e09d03 PT |
224 | } |
225 | ||
d7e09d03 PT |
226 | return buf; |
227 | } | |
228 | EXPORT_SYMBOL(sptlrpc_flavor2name); | |
229 | ||
be23ce1d | 230 | static char *sptlrpc_secflags2str(__u32 flags, char *buf, int bufsize) |
d7e09d03 PT |
231 | { |
232 | buf[0] = '\0'; | |
233 | ||
234 | if (flags & PTLRPC_SEC_FL_REVERSE) | |
235 | strlcat(buf, "reverse,", bufsize); | |
236 | if (flags & PTLRPC_SEC_FL_ROOTONLY) | |
237 | strlcat(buf, "rootonly,", bufsize); | |
238 | if (flags & PTLRPC_SEC_FL_UDESC) | |
239 | strlcat(buf, "udesc,", bufsize); | |
240 | if (flags & PTLRPC_SEC_FL_BULK) | |
241 | strlcat(buf, "bulk,", bufsize); | |
242 | if (buf[0] == '\0') | |
243 | strlcat(buf, "-,", bufsize); | |
244 | ||
245 | return buf; | |
246 | } | |
d7e09d03 PT |
247 | |
248 | /************************************************** | |
249 | * client context APIs * | |
250 | **************************************************/ | |
251 | ||
252 | static | |
253 | struct ptlrpc_cli_ctx *get_my_ctx(struct ptlrpc_sec *sec) | |
254 | { | |
255 | struct vfs_cred vcred; | |
256 | int create = 1, remove_dead = 1; | |
257 | ||
258 | LASSERT(sec); | |
259 | LASSERT(sec->ps_policy->sp_cops->lookup_ctx); | |
260 | ||
261 | if (sec->ps_flvr.sf_flags & (PTLRPC_SEC_FL_REVERSE | | |
262 | PTLRPC_SEC_FL_ROOTONLY)) { | |
263 | vcred.vc_uid = 0; | |
264 | vcred.vc_gid = 0; | |
265 | if (sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_REVERSE) { | |
266 | create = 0; | |
267 | remove_dead = 0; | |
268 | } | |
269 | } else { | |
4b1a25f0 PT |
270 | vcred.vc_uid = from_kuid(&init_user_ns, current_uid()); |
271 | vcred.vc_gid = from_kgid(&init_user_ns, current_gid()); | |
d7e09d03 PT |
272 | } |
273 | ||
274 | return sec->ps_policy->sp_cops->lookup_ctx(sec, &vcred, | |
275 | create, remove_dead); | |
276 | } | |
277 | ||
278 | struct ptlrpc_cli_ctx *sptlrpc_cli_ctx_get(struct ptlrpc_cli_ctx *ctx) | |
279 | { | |
280 | atomic_inc(&ctx->cc_refcount); | |
281 | return ctx; | |
282 | } | |
283 | EXPORT_SYMBOL(sptlrpc_cli_ctx_get); | |
284 | ||
285 | void sptlrpc_cli_ctx_put(struct ptlrpc_cli_ctx *ctx, int sync) | |
286 | { | |
287 | struct ptlrpc_sec *sec = ctx->cc_sec; | |
288 | ||
289 | LASSERT(sec); | |
290 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); | |
291 | ||
292 | if (!atomic_dec_and_test(&ctx->cc_refcount)) | |
293 | return; | |
294 | ||
295 | sec->ps_policy->sp_cops->release_ctx(sec, ctx, sync); | |
296 | } | |
297 | EXPORT_SYMBOL(sptlrpc_cli_ctx_put); | |
298 | ||
d7e09d03 PT |
299 | static int import_sec_check_expire(struct obd_import *imp) |
300 | { | |
d0bfef31 | 301 | int adapt = 0; |
d7e09d03 PT |
302 | |
303 | spin_lock(&imp->imp_lock); | |
304 | if (imp->imp_sec_expire && | |
986ef135 | 305 | imp->imp_sec_expire < ktime_get_real_seconds()) { |
d7e09d03 PT |
306 | adapt = 1; |
307 | imp->imp_sec_expire = 0; | |
308 | } | |
309 | spin_unlock(&imp->imp_lock); | |
310 | ||
311 | if (!adapt) | |
312 | return 0; | |
313 | ||
314 | CDEBUG(D_SEC, "found delayed sec adapt expired, do it now\n"); | |
81fb955d | 315 | return sptlrpc_import_sec_adapt(imp, NULL, NULL); |
d7e09d03 PT |
316 | } |
317 | ||
318 | static int import_sec_validate_get(struct obd_import *imp, | |
319 | struct ptlrpc_sec **sec) | |
320 | { | |
d0bfef31 | 321 | int rc; |
d7e09d03 PT |
322 | |
323 | if (unlikely(imp->imp_sec_expire)) { | |
324 | rc = import_sec_check_expire(imp); | |
325 | if (rc) | |
326 | return rc; | |
327 | } | |
328 | ||
329 | *sec = sptlrpc_import_sec_ref(imp); | |
330 | if (*sec == NULL) { | |
331 | CERROR("import %p (%s) with no sec\n", | |
332 | imp, ptlrpc_import_state_name(imp->imp_state)); | |
333 | return -EACCES; | |
334 | } | |
335 | ||
336 | if (unlikely((*sec)->ps_dying)) { | |
337 | CERROR("attempt to use dying sec %p\n", sec); | |
338 | sptlrpc_sec_put(*sec); | |
339 | return -EACCES; | |
340 | } | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | /** | |
346 | * Given a \a req, find or allocate a appropriate context for it. | |
347 | * \pre req->rq_cli_ctx == NULL. | |
348 | * | |
349 | * \retval 0 succeed, and req->rq_cli_ctx is set. | |
350 | * \retval -ev error number, and req->rq_cli_ctx == NULL. | |
351 | */ | |
352 | int sptlrpc_req_get_ctx(struct ptlrpc_request *req) | |
353 | { | |
354 | struct obd_import *imp = req->rq_import; | |
355 | struct ptlrpc_sec *sec; | |
356 | int rc; | |
d7e09d03 PT |
357 | |
358 | LASSERT(!req->rq_cli_ctx); | |
359 | LASSERT(imp); | |
360 | ||
361 | rc = import_sec_validate_get(imp, &sec); | |
362 | if (rc) | |
0a3bdb00 | 363 | return rc; |
d7e09d03 PT |
364 | |
365 | req->rq_cli_ctx = get_my_ctx(sec); | |
366 | ||
367 | sptlrpc_sec_put(sec); | |
368 | ||
369 | if (!req->rq_cli_ctx) { | |
370 | CERROR("req %p: fail to get context\n", req); | |
0a3bdb00 | 371 | return -ENOMEM; |
d7e09d03 PT |
372 | } |
373 | ||
0a3bdb00 | 374 | return 0; |
d7e09d03 PT |
375 | } |
376 | ||
377 | /** | |
378 | * Drop the context for \a req. | |
379 | * \pre req->rq_cli_ctx != NULL. | |
380 | * \post req->rq_cli_ctx == NULL. | |
381 | * | |
382 | * If \a sync == 0, this function should return quickly without sleep; | |
383 | * otherwise it might trigger and wait for the whole process of sending | |
384 | * an context-destroying rpc to server. | |
385 | */ | |
386 | void sptlrpc_req_put_ctx(struct ptlrpc_request *req, int sync) | |
387 | { | |
d7e09d03 PT |
388 | LASSERT(req); |
389 | LASSERT(req->rq_cli_ctx); | |
390 | ||
391 | /* request might be asked to release earlier while still | |
392 | * in the context waiting list. | |
393 | */ | |
394 | if (!list_empty(&req->rq_ctx_chain)) { | |
395 | spin_lock(&req->rq_cli_ctx->cc_lock); | |
396 | list_del_init(&req->rq_ctx_chain); | |
397 | spin_unlock(&req->rq_cli_ctx->cc_lock); | |
398 | } | |
399 | ||
400 | sptlrpc_cli_ctx_put(req->rq_cli_ctx, sync); | |
401 | req->rq_cli_ctx = NULL; | |
d7e09d03 PT |
402 | } |
403 | ||
404 | static | |
405 | int sptlrpc_req_ctx_switch(struct ptlrpc_request *req, | |
406 | struct ptlrpc_cli_ctx *oldctx, | |
407 | struct ptlrpc_cli_ctx *newctx) | |
408 | { | |
d0bfef31 CH |
409 | struct sptlrpc_flavor old_flvr; |
410 | char *reqmsg = NULL; /* to workaround old gcc */ | |
411 | int reqmsg_size; | |
412 | int rc = 0; | |
d7e09d03 PT |
413 | |
414 | LASSERT(req->rq_reqmsg); | |
415 | LASSERT(req->rq_reqlen); | |
416 | LASSERT(req->rq_replen); | |
417 | ||
2d00bd17 JP |
418 | CDEBUG(D_SEC, "req %p: switch ctx %p(%u->%s) -> %p(%u->%s), switch sec %p(%s) -> %p(%s)\n", |
419 | req, | |
d7e09d03 PT |
420 | oldctx, oldctx->cc_vcred.vc_uid, sec2target_str(oldctx->cc_sec), |
421 | newctx, newctx->cc_vcred.vc_uid, sec2target_str(newctx->cc_sec), | |
422 | oldctx->cc_sec, oldctx->cc_sec->ps_policy->sp_name, | |
423 | newctx->cc_sec, newctx->cc_sec->ps_policy->sp_name); | |
424 | ||
425 | /* save flavor */ | |
426 | old_flvr = req->rq_flvr; | |
427 | ||
428 | /* save request message */ | |
429 | reqmsg_size = req->rq_reqlen; | |
430 | if (reqmsg_size != 0) { | |
ee0ec194 | 431 | reqmsg = libcfs_kvzalloc(reqmsg_size, GFP_NOFS); |
d7e09d03 PT |
432 | if (reqmsg == NULL) |
433 | return -ENOMEM; | |
434 | memcpy(reqmsg, req->rq_reqmsg, reqmsg_size); | |
435 | } | |
436 | ||
437 | /* release old req/rep buf */ | |
438 | req->rq_cli_ctx = oldctx; | |
439 | sptlrpc_cli_free_reqbuf(req); | |
440 | sptlrpc_cli_free_repbuf(req); | |
441 | req->rq_cli_ctx = newctx; | |
442 | ||
443 | /* recalculate the flavor */ | |
444 | sptlrpc_req_set_flavor(req, 0); | |
445 | ||
446 | /* alloc new request buffer | |
447 | * we don't need to alloc reply buffer here, leave it to the | |
448 | * rest procedure of ptlrpc */ | |
449 | if (reqmsg_size != 0) { | |
450 | rc = sptlrpc_cli_alloc_reqbuf(req, reqmsg_size); | |
451 | if (!rc) { | |
452 | LASSERT(req->rq_reqmsg); | |
453 | memcpy(req->rq_reqmsg, reqmsg, reqmsg_size); | |
454 | } else { | |
455 | CWARN("failed to alloc reqbuf: %d\n", rc); | |
456 | req->rq_flvr = old_flvr; | |
457 | } | |
458 | ||
ee0ec194 | 459 | kvfree(reqmsg); |
d7e09d03 PT |
460 | } |
461 | return rc; | |
462 | } | |
463 | ||
464 | /** | |
465 | * If current context of \a req is dead somehow, e.g. we just switched flavor | |
466 | * thus marked original contexts dead, we'll find a new context for it. if | |
467 | * no switch is needed, \a req will end up with the same context. | |
468 | * | |
469 | * \note a request must have a context, to keep other parts of code happy. | |
470 | * In any case of failure during the switching, we must restore the old one. | |
471 | */ | |
cf0a7f9e | 472 | static int sptlrpc_req_replace_dead_ctx(struct ptlrpc_request *req) |
d7e09d03 PT |
473 | { |
474 | struct ptlrpc_cli_ctx *oldctx = req->rq_cli_ctx; | |
475 | struct ptlrpc_cli_ctx *newctx; | |
d0bfef31 | 476 | int rc; |
d7e09d03 PT |
477 | |
478 | LASSERT(oldctx); | |
479 | ||
480 | sptlrpc_cli_ctx_get(oldctx); | |
481 | sptlrpc_req_put_ctx(req, 0); | |
482 | ||
483 | rc = sptlrpc_req_get_ctx(req); | |
484 | if (unlikely(rc)) { | |
485 | LASSERT(!req->rq_cli_ctx); | |
486 | ||
487 | /* restore old ctx */ | |
488 | req->rq_cli_ctx = oldctx; | |
0a3bdb00 | 489 | return rc; |
d7e09d03 PT |
490 | } |
491 | ||
492 | newctx = req->rq_cli_ctx; | |
493 | LASSERT(newctx); | |
494 | ||
495 | if (unlikely(newctx == oldctx && | |
496 | test_bit(PTLRPC_CTX_DEAD_BIT, &oldctx->cc_flags))) { | |
497 | /* | |
498 | * still get the old dead ctx, usually means system too busy | |
499 | */ | |
500 | CDEBUG(D_SEC, | |
501 | "ctx (%p, fl %lx) doesn't switch, relax a little bit\n", | |
502 | newctx, newctx->cc_flags); | |
503 | ||
18fd5baa PT |
504 | set_current_state(TASK_INTERRUPTIBLE); |
505 | schedule_timeout(HZ); | |
d7e09d03 PT |
506 | } else { |
507 | /* | |
508 | * it's possible newctx == oldctx if we're switching | |
509 | * subflavor with the same sec. | |
510 | */ | |
511 | rc = sptlrpc_req_ctx_switch(req, oldctx, newctx); | |
512 | if (rc) { | |
513 | /* restore old ctx */ | |
514 | sptlrpc_req_put_ctx(req, 0); | |
515 | req->rq_cli_ctx = oldctx; | |
0a3bdb00 | 516 | return rc; |
d7e09d03 PT |
517 | } |
518 | ||
519 | LASSERT(req->rq_cli_ctx == newctx); | |
520 | } | |
521 | ||
522 | sptlrpc_cli_ctx_put(oldctx, 1); | |
0a3bdb00 | 523 | return 0; |
d7e09d03 | 524 | } |
d7e09d03 PT |
525 | |
526 | static | |
527 | int ctx_check_refresh(struct ptlrpc_cli_ctx *ctx) | |
528 | { | |
529 | if (cli_ctx_is_refreshed(ctx)) | |
530 | return 1; | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static | |
535 | int ctx_refresh_timeout(void *data) | |
536 | { | |
537 | struct ptlrpc_request *req = data; | |
538 | int rc; | |
539 | ||
540 | /* conn_cnt is needed in expire_one_request */ | |
541 | lustre_msg_set_conn_cnt(req->rq_reqmsg, req->rq_import->imp_conn_cnt); | |
542 | ||
543 | rc = ptlrpc_expire_one_request(req, 1); | |
544 | /* if we started recovery, we should mark this ctx dead; otherwise | |
545 | * in case of lgssd died nobody would retire this ctx, following | |
546 | * connecting will still find the same ctx thus cause deadlock. | |
547 | * there's an assumption that expire time of the request should be | |
548 | * later than the context refresh expire time. | |
549 | */ | |
550 | if (rc == 0) | |
d0f17b64 | 551 | req->rq_cli_ctx->cc_ops->force_die(req->rq_cli_ctx, 0); |
d7e09d03 PT |
552 | return rc; |
553 | } | |
554 | ||
555 | static | |
556 | void ctx_refresh_interrupt(void *data) | |
557 | { | |
558 | struct ptlrpc_request *req = data; | |
559 | ||
560 | spin_lock(&req->rq_lock); | |
561 | req->rq_intr = 1; | |
562 | spin_unlock(&req->rq_lock); | |
563 | } | |
564 | ||
565 | static | |
566 | void req_off_ctx_list(struct ptlrpc_request *req, struct ptlrpc_cli_ctx *ctx) | |
567 | { | |
568 | spin_lock(&ctx->cc_lock); | |
569 | if (!list_empty(&req->rq_ctx_chain)) | |
570 | list_del_init(&req->rq_ctx_chain); | |
571 | spin_unlock(&ctx->cc_lock); | |
572 | } | |
573 | ||
574 | /** | |
575 | * To refresh the context of \req, if it's not up-to-date. | |
576 | * \param timeout | |
577 | * - < 0: don't wait | |
578 | * - = 0: wait until success or fatal error occur | |
579 | * - > 0: timeout value (in seconds) | |
580 | * | |
581 | * The status of the context could be subject to be changed by other threads | |
582 | * at any time. We allow this race, but once we return with 0, the caller will | |
583 | * suppose it's uptodated and keep using it until the owning rpc is done. | |
584 | * | |
585 | * \retval 0 only if the context is uptodated. | |
586 | * \retval -ev error number. | |
587 | */ | |
588 | int sptlrpc_req_refresh_ctx(struct ptlrpc_request *req, long timeout) | |
589 | { | |
d0bfef31 CH |
590 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
591 | struct ptlrpc_sec *sec; | |
592 | struct l_wait_info lwi; | |
593 | int rc; | |
d7e09d03 PT |
594 | |
595 | LASSERT(ctx); | |
596 | ||
597 | if (req->rq_ctx_init || req->rq_ctx_fini) | |
0a3bdb00 | 598 | return 0; |
d7e09d03 PT |
599 | |
600 | /* | |
601 | * during the process a request's context might change type even | |
602 | * (e.g. from gss ctx to null ctx), so each loop we need to re-check | |
603 | * everything | |
604 | */ | |
605 | again: | |
606 | rc = import_sec_validate_get(req->rq_import, &sec); | |
607 | if (rc) | |
0a3bdb00 | 608 | return rc; |
d7e09d03 PT |
609 | |
610 | if (sec->ps_flvr.sf_rpc != req->rq_flvr.sf_rpc) { | |
611 | CDEBUG(D_SEC, "req %p: flavor has changed %x -> %x\n", | |
612 | req, req->rq_flvr.sf_rpc, sec->ps_flvr.sf_rpc); | |
613 | req_off_ctx_list(req, ctx); | |
614 | sptlrpc_req_replace_dead_ctx(req); | |
615 | ctx = req->rq_cli_ctx; | |
616 | } | |
617 | sptlrpc_sec_put(sec); | |
618 | ||
619 | if (cli_ctx_is_eternal(ctx)) | |
0a3bdb00 | 620 | return 0; |
d7e09d03 PT |
621 | |
622 | if (unlikely(test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags))) { | |
623 | LASSERT(ctx->cc_ops->refresh); | |
624 | ctx->cc_ops->refresh(ctx); | |
625 | } | |
626 | LASSERT(test_bit(PTLRPC_CTX_NEW_BIT, &ctx->cc_flags) == 0); | |
627 | ||
628 | LASSERT(ctx->cc_ops->validate); | |
629 | if (ctx->cc_ops->validate(ctx) == 0) { | |
630 | req_off_ctx_list(req, ctx); | |
0a3bdb00 | 631 | return 0; |
d7e09d03 PT |
632 | } |
633 | ||
634 | if (unlikely(test_bit(PTLRPC_CTX_ERROR_BIT, &ctx->cc_flags))) { | |
635 | spin_lock(&req->rq_lock); | |
636 | req->rq_err = 1; | |
637 | spin_unlock(&req->rq_lock); | |
638 | req_off_ctx_list(req, ctx); | |
0a3bdb00 | 639 | return -EPERM; |
d7e09d03 PT |
640 | } |
641 | ||
642 | /* | |
643 | * There's a subtle issue for resending RPCs, suppose following | |
644 | * situation: | |
645 | * 1. the request was sent to server. | |
646 | * 2. recovery was kicked start, after finished the request was | |
647 | * marked as resent. | |
648 | * 3. resend the request. | |
649 | * 4. old reply from server received, we accept and verify the reply. | |
650 | * this has to be success, otherwise the error will be aware | |
651 | * by application. | |
652 | * 5. new reply from server received, dropped by LNet. | |
653 | * | |
654 | * Note the xid of old & new request is the same. We can't simply | |
655 | * change xid for the resent request because the server replies on | |
656 | * it for reply reconstruction. | |
657 | * | |
658 | * Commonly the original context should be uptodate because we | |
659 | * have a expiry nice time; server will keep its context because | |
660 | * we at least hold a ref of old context which prevent context | |
661 | * destroying RPC being sent. So server still can accept the request | |
662 | * and finish the RPC. But if that's not the case: | |
663 | * 1. If server side context has been trimmed, a NO_CONTEXT will | |
664 | * be returned, gss_cli_ctx_verify/unseal will switch to new | |
665 | * context by force. | |
666 | * 2. Current context never be refreshed, then we are fine: we | |
667 | * never really send request with old context before. | |
668 | */ | |
669 | if (test_bit(PTLRPC_CTX_UPTODATE_BIT, &ctx->cc_flags) && | |
670 | unlikely(req->rq_reqmsg) && | |
671 | lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { | |
672 | req_off_ctx_list(req, ctx); | |
0a3bdb00 | 673 | return 0; |
d7e09d03 PT |
674 | } |
675 | ||
676 | if (unlikely(test_bit(PTLRPC_CTX_DEAD_BIT, &ctx->cc_flags))) { | |
677 | req_off_ctx_list(req, ctx); | |
678 | /* | |
679 | * don't switch ctx if import was deactivated | |
680 | */ | |
681 | if (req->rq_import->imp_deactive) { | |
682 | spin_lock(&req->rq_lock); | |
683 | req->rq_err = 1; | |
684 | spin_unlock(&req->rq_lock); | |
0a3bdb00 | 685 | return -EINTR; |
d7e09d03 PT |
686 | } |
687 | ||
688 | rc = sptlrpc_req_replace_dead_ctx(req); | |
689 | if (rc) { | |
690 | LASSERT(ctx == req->rq_cli_ctx); | |
691 | CERROR("req %p: failed to replace dead ctx %p: %d\n", | |
692 | req, ctx, rc); | |
693 | spin_lock(&req->rq_lock); | |
694 | req->rq_err = 1; | |
695 | spin_unlock(&req->rq_lock); | |
0a3bdb00 | 696 | return rc; |
d7e09d03 PT |
697 | } |
698 | ||
699 | ctx = req->rq_cli_ctx; | |
700 | goto again; | |
701 | } | |
702 | ||
703 | /* | |
704 | * Now we're sure this context is during upcall, add myself into | |
705 | * waiting list | |
706 | */ | |
707 | spin_lock(&ctx->cc_lock); | |
708 | if (list_empty(&req->rq_ctx_chain)) | |
709 | list_add(&req->rq_ctx_chain, &ctx->cc_req_list); | |
710 | spin_unlock(&ctx->cc_lock); | |
711 | ||
712 | if (timeout < 0) | |
0a3bdb00 | 713 | return -EWOULDBLOCK; |
d7e09d03 PT |
714 | |
715 | /* Clear any flags that may be present from previous sends */ | |
716 | LASSERT(req->rq_receiving_reply == 0); | |
717 | spin_lock(&req->rq_lock); | |
718 | req->rq_err = 0; | |
719 | req->rq_timedout = 0; | |
720 | req->rq_resend = 0; | |
721 | req->rq_restart = 0; | |
722 | spin_unlock(&req->rq_lock); | |
723 | ||
724 | lwi = LWI_TIMEOUT_INTR(timeout * HZ, ctx_refresh_timeout, | |
725 | ctx_refresh_interrupt, req); | |
726 | rc = l_wait_event(req->rq_reply_waitq, ctx_check_refresh(ctx), &lwi); | |
727 | ||
728 | /* | |
729 | * following cases could lead us here: | |
730 | * - successfully refreshed; | |
731 | * - interrupted; | |
732 | * - timedout, and we don't want recover from the failure; | |
733 | * - timedout, and waked up upon recovery finished; | |
734 | * - someone else mark this ctx dead by force; | |
735 | * - someone invalidate the req and call ptlrpc_client_wake_req(), | |
736 | * e.g. ptlrpc_abort_inflight(); | |
737 | */ | |
738 | if (!cli_ctx_is_refreshed(ctx)) { | |
0c2bc758 | 739 | /* timed out or interrupted */ |
d7e09d03 PT |
740 | req_off_ctx_list(req, ctx); |
741 | ||
742 | LASSERT(rc != 0); | |
0a3bdb00 | 743 | return rc; |
d7e09d03 PT |
744 | } |
745 | ||
746 | goto again; | |
747 | } | |
748 | ||
749 | /** | |
750 | * Initialize flavor settings for \a req, according to \a opcode. | |
751 | * | |
752 | * \note this could be called in two situations: | |
753 | * - new request from ptlrpc_pre_req(), with proper @opcode | |
754 | * - old request which changed ctx in the middle, with @opcode == 0 | |
755 | */ | |
756 | void sptlrpc_req_set_flavor(struct ptlrpc_request *req, int opcode) | |
757 | { | |
758 | struct ptlrpc_sec *sec; | |
759 | ||
760 | LASSERT(req->rq_import); | |
761 | LASSERT(req->rq_cli_ctx); | |
762 | LASSERT(req->rq_cli_ctx->cc_sec); | |
763 | LASSERT(req->rq_bulk_read == 0 || req->rq_bulk_write == 0); | |
764 | ||
0c2bc758 | 765 | /* special security flags according to opcode */ |
d7e09d03 PT |
766 | switch (opcode) { |
767 | case OST_READ: | |
768 | case MDS_READPAGE: | |
769 | case MGS_CONFIG_READ: | |
770 | case OBD_IDX_READ: | |
771 | req->rq_bulk_read = 1; | |
772 | break; | |
773 | case OST_WRITE: | |
774 | case MDS_WRITEPAGE: | |
775 | req->rq_bulk_write = 1; | |
776 | break; | |
777 | case SEC_CTX_INIT: | |
778 | req->rq_ctx_init = 1; | |
779 | break; | |
780 | case SEC_CTX_FINI: | |
781 | req->rq_ctx_fini = 1; | |
782 | break; | |
783 | case 0: | |
784 | /* init/fini rpc won't be resend, so can't be here */ | |
785 | LASSERT(req->rq_ctx_init == 0); | |
786 | LASSERT(req->rq_ctx_fini == 0); | |
787 | ||
788 | /* cleanup flags, which should be recalculated */ | |
789 | req->rq_pack_udesc = 0; | |
790 | req->rq_pack_bulk = 0; | |
791 | break; | |
792 | } | |
793 | ||
794 | sec = req->rq_cli_ctx->cc_sec; | |
795 | ||
796 | spin_lock(&sec->ps_lock); | |
797 | req->rq_flvr = sec->ps_flvr; | |
798 | spin_unlock(&sec->ps_lock); | |
799 | ||
800 | /* force SVC_NULL for context initiation rpc, SVC_INTG for context | |
801 | * destruction rpc */ | |
802 | if (unlikely(req->rq_ctx_init)) | |
803 | flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_NULL); | |
804 | else if (unlikely(req->rq_ctx_fini)) | |
805 | flvr_set_svc(&req->rq_flvr.sf_rpc, SPTLRPC_SVC_INTG); | |
806 | ||
807 | /* user descriptor flag, null security can't do it anyway */ | |
808 | if ((sec->ps_flvr.sf_flags & PTLRPC_SEC_FL_UDESC) && | |
809 | (req->rq_flvr.sf_rpc != SPTLRPC_FLVR_NULL)) | |
810 | req->rq_pack_udesc = 1; | |
811 | ||
812 | /* bulk security flag */ | |
813 | if ((req->rq_bulk_read || req->rq_bulk_write) && | |
814 | sptlrpc_flavor_has_bulk(&req->rq_flvr)) | |
815 | req->rq_pack_bulk = 1; | |
816 | } | |
817 | ||
818 | void sptlrpc_request_out_callback(struct ptlrpc_request *req) | |
819 | { | |
820 | if (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc) != SPTLRPC_SVC_PRIV) | |
821 | return; | |
822 | ||
823 | LASSERT(req->rq_clrbuf); | |
824 | if (req->rq_pool || !req->rq_reqbuf) | |
825 | return; | |
826 | ||
9ae10597 | 827 | kfree(req->rq_reqbuf); |
d7e09d03 PT |
828 | req->rq_reqbuf = NULL; |
829 | req->rq_reqbuf_len = 0; | |
830 | } | |
831 | ||
832 | /** | |
833 | * Given an import \a imp, check whether current user has a valid context | |
834 | * or not. We may create a new context and try to refresh it, and try | |
835 | * repeatedly try in case of non-fatal errors. Return 0 means success. | |
836 | */ | |
837 | int sptlrpc_import_check_ctx(struct obd_import *imp) | |
838 | { | |
d0bfef31 | 839 | struct ptlrpc_sec *sec; |
d7e09d03 PT |
840 | struct ptlrpc_cli_ctx *ctx; |
841 | struct ptlrpc_request *req = NULL; | |
842 | int rc; | |
d7e09d03 PT |
843 | |
844 | might_sleep(); | |
845 | ||
846 | sec = sptlrpc_import_sec_ref(imp); | |
847 | ctx = get_my_ctx(sec); | |
848 | sptlrpc_sec_put(sec); | |
849 | ||
850 | if (!ctx) | |
0a3bdb00 | 851 | return -ENOMEM; |
d7e09d03 PT |
852 | |
853 | if (cli_ctx_is_eternal(ctx) || | |
854 | ctx->cc_ops->validate(ctx) == 0) { | |
855 | sptlrpc_cli_ctx_put(ctx, 1); | |
0a3bdb00 | 856 | return 0; |
d7e09d03 PT |
857 | } |
858 | ||
859 | if (cli_ctx_is_error(ctx)) { | |
860 | sptlrpc_cli_ctx_put(ctx, 1); | |
0a3bdb00 | 861 | return -EACCES; |
d7e09d03 PT |
862 | } |
863 | ||
0be19afa | 864 | req = ptlrpc_request_cache_alloc(GFP_NOFS); |
d7e09d03 | 865 | if (!req) |
0a3bdb00 | 866 | return -ENOMEM; |
d7e09d03 PT |
867 | |
868 | spin_lock_init(&req->rq_lock); | |
869 | atomic_set(&req->rq_refcount, 10000); | |
870 | INIT_LIST_HEAD(&req->rq_ctx_chain); | |
871 | init_waitqueue_head(&req->rq_reply_waitq); | |
872 | init_waitqueue_head(&req->rq_set_waitq); | |
873 | req->rq_import = imp; | |
874 | req->rq_flvr = sec->ps_flvr; | |
875 | req->rq_cli_ctx = ctx; | |
876 | ||
877 | rc = sptlrpc_req_refresh_ctx(req, 0); | |
878 | LASSERT(list_empty(&req->rq_ctx_chain)); | |
879 | sptlrpc_cli_ctx_put(req->rq_cli_ctx, 1); | |
35b2e1b7 | 880 | ptlrpc_request_cache_free(req); |
d7e09d03 | 881 | |
0a3bdb00 | 882 | return rc; |
d7e09d03 PT |
883 | } |
884 | ||
885 | /** | |
886 | * Used by ptlrpc client, to perform the pre-defined security transformation | |
887 | * upon the request message of \a req. After this function called, | |
888 | * req->rq_reqmsg is still accessible as clear text. | |
889 | */ | |
890 | int sptlrpc_cli_wrap_request(struct ptlrpc_request *req) | |
891 | { | |
892 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
893 | int rc = 0; | |
d7e09d03 PT |
894 | |
895 | LASSERT(ctx); | |
896 | LASSERT(ctx->cc_sec); | |
897 | LASSERT(req->rq_reqbuf || req->rq_clrbuf); | |
898 | ||
899 | /* we wrap bulk request here because now we can be sure | |
900 | * the context is uptodate. | |
901 | */ | |
902 | if (req->rq_bulk) { | |
903 | rc = sptlrpc_cli_wrap_bulk(req, req->rq_bulk); | |
904 | if (rc) | |
0a3bdb00 | 905 | return rc; |
d7e09d03 PT |
906 | } |
907 | ||
908 | switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { | |
909 | case SPTLRPC_SVC_NULL: | |
910 | case SPTLRPC_SVC_AUTH: | |
911 | case SPTLRPC_SVC_INTG: | |
912 | LASSERT(ctx->cc_ops->sign); | |
913 | rc = ctx->cc_ops->sign(ctx, req); | |
914 | break; | |
915 | case SPTLRPC_SVC_PRIV: | |
916 | LASSERT(ctx->cc_ops->seal); | |
917 | rc = ctx->cc_ops->seal(ctx, req); | |
918 | break; | |
919 | default: | |
920 | LBUG(); | |
921 | } | |
922 | ||
923 | if (rc == 0) { | |
924 | LASSERT(req->rq_reqdata_len); | |
925 | LASSERT(req->rq_reqdata_len % 8 == 0); | |
926 | LASSERT(req->rq_reqdata_len <= req->rq_reqbuf_len); | |
927 | } | |
928 | ||
0a3bdb00 | 929 | return rc; |
d7e09d03 PT |
930 | } |
931 | ||
932 | static int do_cli_unwrap_reply(struct ptlrpc_request *req) | |
933 | { | |
934 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
d0bfef31 | 935 | int rc; |
d7e09d03 PT |
936 | |
937 | LASSERT(ctx); | |
938 | LASSERT(ctx->cc_sec); | |
939 | LASSERT(req->rq_repbuf); | |
940 | LASSERT(req->rq_repdata); | |
941 | LASSERT(req->rq_repmsg == NULL); | |
942 | ||
943 | req->rq_rep_swab_mask = 0; | |
944 | ||
945 | rc = __lustre_unpack_msg(req->rq_repdata, req->rq_repdata_len); | |
946 | switch (rc) { | |
947 | case 1: | |
948 | lustre_set_rep_swabbed(req, MSG_PTLRPC_HEADER_OFF); | |
949 | case 0: | |
950 | break; | |
951 | default: | |
b0f5aad5 | 952 | CERROR("failed unpack reply: x%llu\n", req->rq_xid); |
0a3bdb00 | 953 | return -EPROTO; |
d7e09d03 PT |
954 | } |
955 | ||
956 | if (req->rq_repdata_len < sizeof(struct lustre_msg)) { | |
957 | CERROR("replied data length %d too small\n", | |
958 | req->rq_repdata_len); | |
0a3bdb00 | 959 | return -EPROTO; |
d7e09d03 PT |
960 | } |
961 | ||
962 | if (SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr) != | |
963 | SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)) { | |
964 | CERROR("reply policy %u doesn't match request policy %u\n", | |
965 | SPTLRPC_FLVR_POLICY(req->rq_repdata->lm_secflvr), | |
966 | SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc)); | |
0a3bdb00 | 967 | return -EPROTO; |
d7e09d03 PT |
968 | } |
969 | ||
970 | switch (SPTLRPC_FLVR_SVC(req->rq_flvr.sf_rpc)) { | |
971 | case SPTLRPC_SVC_NULL: | |
972 | case SPTLRPC_SVC_AUTH: | |
973 | case SPTLRPC_SVC_INTG: | |
974 | LASSERT(ctx->cc_ops->verify); | |
975 | rc = ctx->cc_ops->verify(ctx, req); | |
976 | break; | |
977 | case SPTLRPC_SVC_PRIV: | |
978 | LASSERT(ctx->cc_ops->unseal); | |
979 | rc = ctx->cc_ops->unseal(ctx, req); | |
980 | break; | |
981 | default: | |
982 | LBUG(); | |
983 | } | |
984 | LASSERT(rc || req->rq_repmsg || req->rq_resend); | |
985 | ||
986 | if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL && | |
987 | !req->rq_ctx_init) | |
988 | req->rq_rep_swab_mask = 0; | |
0a3bdb00 | 989 | return rc; |
d7e09d03 PT |
990 | } |
991 | ||
992 | /** | |
993 | * Used by ptlrpc client, to perform security transformation upon the reply | |
994 | * message of \a req. After return successfully, req->rq_repmsg points to | |
995 | * the reply message in clear text. | |
996 | * | |
997 | * \pre the reply buffer should have been un-posted from LNet, so nothing is | |
998 | * going to change. | |
999 | */ | |
1000 | int sptlrpc_cli_unwrap_reply(struct ptlrpc_request *req) | |
1001 | { | |
1002 | LASSERT(req->rq_repbuf); | |
1003 | LASSERT(req->rq_repdata == NULL); | |
1004 | LASSERT(req->rq_repmsg == NULL); | |
1005 | LASSERT(req->rq_reply_off + req->rq_nob_received <= req->rq_repbuf_len); | |
1006 | ||
1007 | if (req->rq_reply_off == 0 && | |
1008 | (lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) { | |
1009 | CERROR("real reply with offset 0\n"); | |
1010 | return -EPROTO; | |
1011 | } | |
1012 | ||
1013 | if (req->rq_reply_off % 8 != 0) { | |
1014 | CERROR("reply at odd offset %u\n", req->rq_reply_off); | |
1015 | return -EPROTO; | |
1016 | } | |
1017 | ||
1018 | req->rq_repdata = (struct lustre_msg *) | |
1019 | (req->rq_repbuf + req->rq_reply_off); | |
1020 | req->rq_repdata_len = req->rq_nob_received; | |
1021 | ||
1022 | return do_cli_unwrap_reply(req); | |
1023 | } | |
1024 | ||
1025 | /** | |
1026 | * Used by ptlrpc client, to perform security transformation upon the early | |
1027 | * reply message of \a req. We expect the rq_reply_off is 0, and | |
1028 | * rq_nob_received is the early reply size. | |
1029 | * | |
1030 | * Because the receive buffer might be still posted, the reply data might be | |
1031 | * changed at any time, no matter we're holding rq_lock or not. For this reason | |
1032 | * we allocate a separate ptlrpc_request and reply buffer for early reply | |
1033 | * processing. | |
1034 | * | |
1035 | * \retval 0 success, \a req_ret is filled with a duplicated ptlrpc_request. | |
1036 | * Later the caller must call sptlrpc_cli_finish_early_reply() on the returned | |
1037 | * \a *req_ret to release it. | |
1038 | * \retval -ev error number, and \a req_ret will not be set. | |
1039 | */ | |
1040 | int sptlrpc_cli_unwrap_early_reply(struct ptlrpc_request *req, | |
1041 | struct ptlrpc_request **req_ret) | |
1042 | { | |
d0bfef31 CH |
1043 | struct ptlrpc_request *early_req; |
1044 | char *early_buf; | |
1045 | int early_bufsz, early_size; | |
1046 | int rc; | |
d7e09d03 | 1047 | |
0be19afa | 1048 | early_req = ptlrpc_request_cache_alloc(GFP_NOFS); |
d7e09d03 | 1049 | if (early_req == NULL) |
0a3bdb00 | 1050 | return -ENOMEM; |
d7e09d03 PT |
1051 | |
1052 | early_size = req->rq_nob_received; | |
1053 | early_bufsz = size_roundup_power2(early_size); | |
ee0ec194 | 1054 | early_buf = libcfs_kvzalloc(early_bufsz, GFP_NOFS); |
a9b3e8f3 JL |
1055 | if (early_buf == NULL) { |
1056 | rc = -ENOMEM; | |
1057 | goto err_req; | |
1058 | } | |
d7e09d03 PT |
1059 | |
1060 | /* sanity checkings and copy data out, do it inside spinlock */ | |
1061 | spin_lock(&req->rq_lock); | |
1062 | ||
1063 | if (req->rq_replied) { | |
1064 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1065 | rc = -EALREADY; |
1066 | goto err_buf; | |
d7e09d03 PT |
1067 | } |
1068 | ||
1069 | LASSERT(req->rq_repbuf); | |
1070 | LASSERT(req->rq_repdata == NULL); | |
1071 | LASSERT(req->rq_repmsg == NULL); | |
1072 | ||
1073 | if (req->rq_reply_off != 0) { | |
1074 | CERROR("early reply with offset %u\n", req->rq_reply_off); | |
1075 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1076 | rc = -EPROTO; |
1077 | goto err_buf; | |
d7e09d03 PT |
1078 | } |
1079 | ||
1080 | if (req->rq_nob_received != early_size) { | |
1081 | /* even another early arrived the size should be the same */ | |
1082 | CERROR("data size has changed from %u to %u\n", | |
1083 | early_size, req->rq_nob_received); | |
1084 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1085 | rc = -EINVAL; |
1086 | goto err_buf; | |
d7e09d03 PT |
1087 | } |
1088 | ||
1089 | if (req->rq_nob_received < sizeof(struct lustre_msg)) { | |
1090 | CERROR("early reply length %d too small\n", | |
1091 | req->rq_nob_received); | |
1092 | spin_unlock(&req->rq_lock); | |
a9b3e8f3 JL |
1093 | rc = -EALREADY; |
1094 | goto err_buf; | |
d7e09d03 PT |
1095 | } |
1096 | ||
1097 | memcpy(early_buf, req->rq_repbuf, early_size); | |
1098 | spin_unlock(&req->rq_lock); | |
1099 | ||
1100 | spin_lock_init(&early_req->rq_lock); | |
1101 | early_req->rq_cli_ctx = sptlrpc_cli_ctx_get(req->rq_cli_ctx); | |
1102 | early_req->rq_flvr = req->rq_flvr; | |
1103 | early_req->rq_repbuf = early_buf; | |
1104 | early_req->rq_repbuf_len = early_bufsz; | |
1105 | early_req->rq_repdata = (struct lustre_msg *) early_buf; | |
1106 | early_req->rq_repdata_len = early_size; | |
1107 | early_req->rq_early = 1; | |
1108 | early_req->rq_reqmsg = req->rq_reqmsg; | |
1109 | ||
1110 | rc = do_cli_unwrap_reply(early_req); | |
1111 | if (rc) { | |
1112 | DEBUG_REQ(D_ADAPTTO, early_req, | |
1113 | "error %d unwrap early reply", rc); | |
a9b3e8f3 | 1114 | goto err_ctx; |
d7e09d03 PT |
1115 | } |
1116 | ||
1117 | LASSERT(early_req->rq_repmsg); | |
1118 | *req_ret = early_req; | |
0a3bdb00 | 1119 | return 0; |
d7e09d03 PT |
1120 | |
1121 | err_ctx: | |
1122 | sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); | |
1123 | err_buf: | |
ee0ec194 | 1124 | kvfree(early_buf); |
d7e09d03 | 1125 | err_req: |
35b2e1b7 | 1126 | ptlrpc_request_cache_free(early_req); |
0a3bdb00 | 1127 | return rc; |
d7e09d03 PT |
1128 | } |
1129 | ||
1130 | /** | |
1131 | * Used by ptlrpc client, to release a processed early reply \a early_req. | |
1132 | * | |
1133 | * \pre \a early_req was obtained from calling sptlrpc_cli_unwrap_early_reply(). | |
1134 | */ | |
1135 | void sptlrpc_cli_finish_early_reply(struct ptlrpc_request *early_req) | |
1136 | { | |
1137 | LASSERT(early_req->rq_repbuf); | |
1138 | LASSERT(early_req->rq_repdata); | |
1139 | LASSERT(early_req->rq_repmsg); | |
1140 | ||
1141 | sptlrpc_cli_ctx_put(early_req->rq_cli_ctx, 1); | |
ee0ec194 | 1142 | kvfree(early_req->rq_repbuf); |
35b2e1b7 | 1143 | ptlrpc_request_cache_free(early_req); |
d7e09d03 PT |
1144 | } |
1145 | ||
1146 | /************************************************** | |
1147 | * sec ID * | |
1148 | **************************************************/ | |
1149 | ||
1150 | /* | |
1151 | * "fixed" sec (e.g. null) use sec_id < 0 | |
1152 | */ | |
1153 | static atomic_t sptlrpc_sec_id = ATOMIC_INIT(1); | |
1154 | ||
1155 | int sptlrpc_get_next_secid(void) | |
1156 | { | |
1157 | return atomic_inc_return(&sptlrpc_sec_id); | |
1158 | } | |
1159 | EXPORT_SYMBOL(sptlrpc_get_next_secid); | |
1160 | ||
1161 | /************************************************** | |
1162 | * client side high-level security APIs * | |
1163 | **************************************************/ | |
1164 | ||
1165 | static int sec_cop_flush_ctx_cache(struct ptlrpc_sec *sec, uid_t uid, | |
1166 | int grace, int force) | |
1167 | { | |
1168 | struct ptlrpc_sec_policy *policy = sec->ps_policy; | |
1169 | ||
1170 | LASSERT(policy->sp_cops); | |
1171 | LASSERT(policy->sp_cops->flush_ctx_cache); | |
1172 | ||
1173 | return policy->sp_cops->flush_ctx_cache(sec, uid, grace, force); | |
1174 | } | |
1175 | ||
1176 | static void sec_cop_destroy_sec(struct ptlrpc_sec *sec) | |
1177 | { | |
1178 | struct ptlrpc_sec_policy *policy = sec->ps_policy; | |
1179 | ||
1180 | LASSERT_ATOMIC_ZERO(&sec->ps_refcount); | |
1181 | LASSERT_ATOMIC_ZERO(&sec->ps_nctx); | |
1182 | LASSERT(policy->sp_cops->destroy_sec); | |
1183 | ||
0c2bc758 | 1184 | CDEBUG(D_SEC, "%s@%p: being destroyed\n", sec->ps_policy->sp_name, sec); |
d7e09d03 PT |
1185 | |
1186 | policy->sp_cops->destroy_sec(sec); | |
1187 | sptlrpc_policy_put(policy); | |
1188 | } | |
1189 | ||
d7e09d03 PT |
1190 | static void sptlrpc_sec_kill(struct ptlrpc_sec *sec) |
1191 | { | |
1192 | LASSERT_ATOMIC_POS(&sec->ps_refcount); | |
1193 | ||
1194 | if (sec->ps_policy->sp_cops->kill_sec) { | |
1195 | sec->ps_policy->sp_cops->kill_sec(sec); | |
1196 | ||
1197 | sec_cop_flush_ctx_cache(sec, -1, 1, 1); | |
1198 | } | |
1199 | } | |
1200 | ||
be23ce1d | 1201 | static struct ptlrpc_sec *sptlrpc_sec_get(struct ptlrpc_sec *sec) |
d7e09d03 PT |
1202 | { |
1203 | if (sec) | |
1204 | atomic_inc(&sec->ps_refcount); | |
1205 | ||
1206 | return sec; | |
1207 | } | |
d7e09d03 PT |
1208 | |
1209 | void sptlrpc_sec_put(struct ptlrpc_sec *sec) | |
1210 | { | |
1211 | if (sec) { | |
1212 | LASSERT_ATOMIC_POS(&sec->ps_refcount); | |
1213 | ||
1214 | if (atomic_dec_and_test(&sec->ps_refcount)) { | |
1215 | sptlrpc_gc_del_sec(sec); | |
1216 | sec_cop_destroy_sec(sec); | |
1217 | } | |
1218 | } | |
1219 | } | |
1220 | EXPORT_SYMBOL(sptlrpc_sec_put); | |
1221 | ||
1222 | /* | |
0c2bc758 | 1223 | * policy module is responsible for taking reference of import |
d7e09d03 PT |
1224 | */ |
1225 | static | |
aff9d8e8 | 1226 | struct ptlrpc_sec *sptlrpc_sec_create(struct obd_import *imp, |
d0bfef31 CH |
1227 | struct ptlrpc_svc_ctx *svc_ctx, |
1228 | struct sptlrpc_flavor *sf, | |
1229 | enum lustre_sec_part sp) | |
d7e09d03 PT |
1230 | { |
1231 | struct ptlrpc_sec_policy *policy; | |
d0bfef31 CH |
1232 | struct ptlrpc_sec *sec; |
1233 | char str[32]; | |
d7e09d03 PT |
1234 | |
1235 | if (svc_ctx) { | |
1236 | LASSERT(imp->imp_dlm_fake == 1); | |
1237 | ||
1238 | CDEBUG(D_SEC, "%s %s: reverse sec using flavor %s\n", | |
1239 | imp->imp_obd->obd_type->typ_name, | |
1240 | imp->imp_obd->obd_name, | |
1241 | sptlrpc_flavor2name(sf, str, sizeof(str))); | |
1242 | ||
1243 | policy = sptlrpc_policy_get(svc_ctx->sc_policy); | |
1244 | sf->sf_flags |= PTLRPC_SEC_FL_REVERSE | PTLRPC_SEC_FL_ROOTONLY; | |
1245 | } else { | |
1246 | LASSERT(imp->imp_dlm_fake == 0); | |
1247 | ||
1248 | CDEBUG(D_SEC, "%s %s: select security flavor %s\n", | |
1249 | imp->imp_obd->obd_type->typ_name, | |
1250 | imp->imp_obd->obd_name, | |
1251 | sptlrpc_flavor2name(sf, str, sizeof(str))); | |
1252 | ||
1253 | policy = sptlrpc_wireflavor2policy(sf->sf_rpc); | |
1254 | if (!policy) { | |
1255 | CERROR("invalid flavor 0x%x\n", sf->sf_rpc); | |
0a3bdb00 | 1256 | return NULL; |
d7e09d03 PT |
1257 | } |
1258 | } | |
1259 | ||
1260 | sec = policy->sp_cops->create_sec(imp, svc_ctx, sf); | |
1261 | if (sec) { | |
1262 | atomic_inc(&sec->ps_refcount); | |
1263 | ||
1264 | sec->ps_part = sp; | |
1265 | ||
1266 | if (sec->ps_gc_interval && policy->sp_cops->gc_ctx) | |
1267 | sptlrpc_gc_add_sec(sec); | |
1268 | } else { | |
1269 | sptlrpc_policy_put(policy); | |
1270 | } | |
1271 | ||
0a3bdb00 | 1272 | return sec; |
d7e09d03 PT |
1273 | } |
1274 | ||
1275 | struct ptlrpc_sec *sptlrpc_import_sec_ref(struct obd_import *imp) | |
1276 | { | |
1277 | struct ptlrpc_sec *sec; | |
1278 | ||
1279 | spin_lock(&imp->imp_lock); | |
1280 | sec = sptlrpc_sec_get(imp->imp_sec); | |
1281 | spin_unlock(&imp->imp_lock); | |
1282 | ||
1283 | return sec; | |
1284 | } | |
1285 | EXPORT_SYMBOL(sptlrpc_import_sec_ref); | |
1286 | ||
1287 | static void sptlrpc_import_sec_install(struct obd_import *imp, | |
1288 | struct ptlrpc_sec *sec) | |
1289 | { | |
1290 | struct ptlrpc_sec *old_sec; | |
1291 | ||
1292 | LASSERT_ATOMIC_POS(&sec->ps_refcount); | |
1293 | ||
1294 | spin_lock(&imp->imp_lock); | |
1295 | old_sec = imp->imp_sec; | |
1296 | imp->imp_sec = sec; | |
1297 | spin_unlock(&imp->imp_lock); | |
1298 | ||
1299 | if (old_sec) { | |
1300 | sptlrpc_sec_kill(old_sec); | |
1301 | ||
1302 | /* balance the ref taken by this import */ | |
1303 | sptlrpc_sec_put(old_sec); | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | static inline | |
1308 | int flavor_equal(struct sptlrpc_flavor *sf1, struct sptlrpc_flavor *sf2) | |
1309 | { | |
1310 | return (memcmp(sf1, sf2, sizeof(*sf1)) == 0); | |
1311 | } | |
1312 | ||
1313 | static inline | |
1314 | void flavor_copy(struct sptlrpc_flavor *dst, struct sptlrpc_flavor *src) | |
1315 | { | |
1316 | *dst = *src; | |
1317 | } | |
1318 | ||
1319 | static void sptlrpc_import_sec_adapt_inplace(struct obd_import *imp, | |
1320 | struct ptlrpc_sec *sec, | |
1321 | struct sptlrpc_flavor *sf) | |
1322 | { | |
d0bfef31 | 1323 | char str1[32], str2[32]; |
d7e09d03 PT |
1324 | |
1325 | if (sec->ps_flvr.sf_flags != sf->sf_flags) | |
1326 | CDEBUG(D_SEC, "changing sec flags: %s -> %s\n", | |
1327 | sptlrpc_secflags2str(sec->ps_flvr.sf_flags, | |
1328 | str1, sizeof(str1)), | |
1329 | sptlrpc_secflags2str(sf->sf_flags, | |
1330 | str2, sizeof(str2))); | |
1331 | ||
1332 | spin_lock(&sec->ps_lock); | |
1333 | flavor_copy(&sec->ps_flvr, sf); | |
1334 | spin_unlock(&sec->ps_lock); | |
1335 | } | |
1336 | ||
1337 | /** | |
1338 | * To get an appropriate ptlrpc_sec for the \a imp, according to the current | |
1339 | * configuration. Upon called, imp->imp_sec may or may not be NULL. | |
1340 | * | |
1341 | * - regular import: \a svc_ctx should be NULL and \a flvr is ignored; | |
1342 | * - reverse import: \a svc_ctx and \a flvr are obtained from incoming request. | |
1343 | */ | |
1344 | int sptlrpc_import_sec_adapt(struct obd_import *imp, | |
1345 | struct ptlrpc_svc_ctx *svc_ctx, | |
1346 | struct sptlrpc_flavor *flvr) | |
1347 | { | |
d0bfef31 CH |
1348 | struct ptlrpc_connection *conn; |
1349 | struct sptlrpc_flavor sf; | |
1350 | struct ptlrpc_sec *sec, *newsec; | |
1351 | enum lustre_sec_part sp; | |
1352 | char str[24]; | |
1353 | int rc = 0; | |
d7e09d03 PT |
1354 | |
1355 | might_sleep(); | |
1356 | ||
1357 | if (imp == NULL) | |
0a3bdb00 | 1358 | return 0; |
d7e09d03 PT |
1359 | |
1360 | conn = imp->imp_connection; | |
1361 | ||
1362 | if (svc_ctx == NULL) { | |
1363 | struct client_obd *cliobd = &imp->imp_obd->u.cli; | |
1364 | /* | |
1365 | * normal import, determine flavor from rule set, except | |
1366 | * for mgc the flavor is predetermined. | |
1367 | */ | |
1368 | if (cliobd->cl_sp_me == LUSTRE_SP_MGC) | |
1369 | sf = cliobd->cl_flvr_mgc; | |
1370 | else | |
1371 | sptlrpc_conf_choose_flavor(cliobd->cl_sp_me, | |
1372 | cliobd->cl_sp_to, | |
1373 | &cliobd->cl_target_uuid, | |
1374 | conn->c_self, &sf); | |
1375 | ||
1376 | sp = imp->imp_obd->u.cli.cl_sp_me; | |
1377 | } else { | |
0c2bc758 | 1378 | /* reverse import, determine flavor from incoming request */ |
d7e09d03 PT |
1379 | sf = *flvr; |
1380 | ||
1381 | if (sf.sf_rpc != SPTLRPC_FLVR_NULL) | |
1382 | sf.sf_flags = PTLRPC_SEC_FL_REVERSE | | |
1383 | PTLRPC_SEC_FL_ROOTONLY; | |
1384 | ||
1385 | sp = sptlrpc_target_sec_part(imp->imp_obd); | |
1386 | } | |
1387 | ||
1388 | sec = sptlrpc_import_sec_ref(imp); | |
1389 | if (sec) { | |
d0bfef31 | 1390 | char str2[24]; |
d7e09d03 PT |
1391 | |
1392 | if (flavor_equal(&sf, &sec->ps_flvr)) | |
a9b3e8f3 | 1393 | goto out; |
d7e09d03 PT |
1394 | |
1395 | CDEBUG(D_SEC, "import %s->%s: changing flavor %s -> %s\n", | |
1396 | imp->imp_obd->obd_name, | |
1397 | obd_uuid2str(&conn->c_remote_uuid), | |
1398 | sptlrpc_flavor2name(&sec->ps_flvr, str, sizeof(str)), | |
1399 | sptlrpc_flavor2name(&sf, str2, sizeof(str2))); | |
1400 | ||
1401 | if (SPTLRPC_FLVR_POLICY(sf.sf_rpc) == | |
1402 | SPTLRPC_FLVR_POLICY(sec->ps_flvr.sf_rpc) && | |
1403 | SPTLRPC_FLVR_MECH(sf.sf_rpc) == | |
1404 | SPTLRPC_FLVR_MECH(sec->ps_flvr.sf_rpc)) { | |
1405 | sptlrpc_import_sec_adapt_inplace(imp, sec, &sf); | |
a9b3e8f3 | 1406 | goto out; |
d7e09d03 PT |
1407 | } |
1408 | } else if (SPTLRPC_FLVR_BASE(sf.sf_rpc) != | |
1409 | SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_NULL)) { | |
1410 | CDEBUG(D_SEC, "import %s->%s netid %x: select flavor %s\n", | |
1411 | imp->imp_obd->obd_name, | |
1412 | obd_uuid2str(&conn->c_remote_uuid), | |
1413 | LNET_NIDNET(conn->c_self), | |
1414 | sptlrpc_flavor2name(&sf, str, sizeof(str))); | |
1415 | } | |
1416 | ||
1417 | mutex_lock(&imp->imp_sec_mutex); | |
1418 | ||
1419 | newsec = sptlrpc_sec_create(imp, svc_ctx, &sf, sp); | |
1420 | if (newsec) { | |
1421 | sptlrpc_import_sec_install(imp, newsec); | |
1422 | } else { | |
1423 | CERROR("import %s->%s: failed to create new sec\n", | |
1424 | imp->imp_obd->obd_name, | |
1425 | obd_uuid2str(&conn->c_remote_uuid)); | |
1426 | rc = -EPERM; | |
1427 | } | |
1428 | ||
1429 | mutex_unlock(&imp->imp_sec_mutex); | |
1430 | out: | |
1431 | sptlrpc_sec_put(sec); | |
0a3bdb00 | 1432 | return rc; |
d7e09d03 PT |
1433 | } |
1434 | ||
1435 | void sptlrpc_import_sec_put(struct obd_import *imp) | |
1436 | { | |
1437 | if (imp->imp_sec) { | |
1438 | sptlrpc_sec_kill(imp->imp_sec); | |
1439 | ||
1440 | sptlrpc_sec_put(imp->imp_sec); | |
1441 | imp->imp_sec = NULL; | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | static void import_flush_ctx_common(struct obd_import *imp, | |
1446 | uid_t uid, int grace, int force) | |
1447 | { | |
1448 | struct ptlrpc_sec *sec; | |
1449 | ||
1450 | if (imp == NULL) | |
1451 | return; | |
1452 | ||
1453 | sec = sptlrpc_import_sec_ref(imp); | |
1454 | if (sec == NULL) | |
1455 | return; | |
1456 | ||
1457 | sec_cop_flush_ctx_cache(sec, uid, grace, force); | |
1458 | sptlrpc_sec_put(sec); | |
1459 | } | |
1460 | ||
d7e09d03 PT |
1461 | void sptlrpc_import_flush_my_ctx(struct obd_import *imp) |
1462 | { | |
4b1a25f0 PT |
1463 | import_flush_ctx_common(imp, from_kuid(&init_user_ns, current_uid()), |
1464 | 1, 1); | |
d7e09d03 PT |
1465 | } |
1466 | EXPORT_SYMBOL(sptlrpc_import_flush_my_ctx); | |
1467 | ||
1468 | void sptlrpc_import_flush_all_ctx(struct obd_import *imp) | |
1469 | { | |
1470 | import_flush_ctx_common(imp, -1, 1, 1); | |
1471 | } | |
1472 | EXPORT_SYMBOL(sptlrpc_import_flush_all_ctx); | |
1473 | ||
1474 | /** | |
1475 | * Used by ptlrpc client to allocate request buffer of \a req. Upon return | |
1476 | * successfully, req->rq_reqmsg points to a buffer with size \a msgsize. | |
1477 | */ | |
1478 | int sptlrpc_cli_alloc_reqbuf(struct ptlrpc_request *req, int msgsize) | |
1479 | { | |
1480 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1481 | struct ptlrpc_sec_policy *policy; | |
1482 | int rc; | |
1483 | ||
1484 | LASSERT(ctx); | |
1485 | LASSERT(ctx->cc_sec); | |
1486 | LASSERT(ctx->cc_sec->ps_policy); | |
1487 | LASSERT(req->rq_reqmsg == NULL); | |
1488 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); | |
1489 | ||
1490 | policy = ctx->cc_sec->ps_policy; | |
1491 | rc = policy->sp_cops->alloc_reqbuf(ctx->cc_sec, req, msgsize); | |
1492 | if (!rc) { | |
1493 | LASSERT(req->rq_reqmsg); | |
1494 | LASSERT(req->rq_reqbuf || req->rq_clrbuf); | |
1495 | ||
1496 | /* zeroing preallocated buffer */ | |
1497 | if (req->rq_pool) | |
1498 | memset(req->rq_reqmsg, 0, msgsize); | |
1499 | } | |
1500 | ||
1501 | return rc; | |
1502 | } | |
1503 | ||
1504 | /** | |
1505 | * Used by ptlrpc client to free request buffer of \a req. After this | |
1506 | * req->rq_reqmsg is set to NULL and should not be accessed anymore. | |
1507 | */ | |
1508 | void sptlrpc_cli_free_reqbuf(struct ptlrpc_request *req) | |
1509 | { | |
1510 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1511 | struct ptlrpc_sec_policy *policy; | |
1512 | ||
1513 | LASSERT(ctx); | |
1514 | LASSERT(ctx->cc_sec); | |
1515 | LASSERT(ctx->cc_sec->ps_policy); | |
1516 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); | |
1517 | ||
1518 | if (req->rq_reqbuf == NULL && req->rq_clrbuf == NULL) | |
1519 | return; | |
1520 | ||
1521 | policy = ctx->cc_sec->ps_policy; | |
1522 | policy->sp_cops->free_reqbuf(ctx->cc_sec, req); | |
1523 | req->rq_reqmsg = NULL; | |
1524 | } | |
1525 | ||
1526 | /* | |
1527 | * NOTE caller must guarantee the buffer size is enough for the enlargement | |
1528 | */ | |
1529 | void _sptlrpc_enlarge_msg_inplace(struct lustre_msg *msg, | |
1530 | int segment, int newsize) | |
1531 | { | |
d0bfef31 CH |
1532 | void *src, *dst; |
1533 | int oldsize, oldmsg_size, movesize; | |
d7e09d03 PT |
1534 | |
1535 | LASSERT(segment < msg->lm_bufcount); | |
1536 | LASSERT(msg->lm_buflens[segment] <= newsize); | |
1537 | ||
1538 | if (msg->lm_buflens[segment] == newsize) | |
1539 | return; | |
1540 | ||
1541 | /* nothing to do if we are enlarging the last segment */ | |
1542 | if (segment == msg->lm_bufcount - 1) { | |
1543 | msg->lm_buflens[segment] = newsize; | |
1544 | return; | |
1545 | } | |
1546 | ||
1547 | oldsize = msg->lm_buflens[segment]; | |
1548 | ||
1549 | src = lustre_msg_buf(msg, segment + 1, 0); | |
1550 | msg->lm_buflens[segment] = newsize; | |
1551 | dst = lustre_msg_buf(msg, segment + 1, 0); | |
1552 | msg->lm_buflens[segment] = oldsize; | |
1553 | ||
1554 | /* move from segment + 1 to end segment */ | |
1555 | LASSERT(msg->lm_magic == LUSTRE_MSG_MAGIC_V2); | |
1556 | oldmsg_size = lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens); | |
1557 | movesize = oldmsg_size - ((unsigned long) src - (unsigned long) msg); | |
1558 | LASSERT(movesize >= 0); | |
1559 | ||
1560 | if (movesize) | |
1561 | memmove(dst, src, movesize); | |
1562 | ||
1563 | /* note we don't clear the ares where old data live, not secret */ | |
1564 | ||
1565 | /* finally set new segment size */ | |
1566 | msg->lm_buflens[segment] = newsize; | |
1567 | } | |
1568 | EXPORT_SYMBOL(_sptlrpc_enlarge_msg_inplace); | |
1569 | ||
1570 | /** | |
1571 | * Used by ptlrpc client to enlarge the \a segment of request message pointed | |
1572 | * by req->rq_reqmsg to size \a newsize, all previously filled-in data will be | |
1573 | * preserved after the enlargement. this must be called after original request | |
1574 | * buffer being allocated. | |
1575 | * | |
1576 | * \note after this be called, rq_reqmsg and rq_reqlen might have been changed, | |
1577 | * so caller should refresh its local pointers if needed. | |
1578 | */ | |
1579 | int sptlrpc_cli_enlarge_reqbuf(struct ptlrpc_request *req, | |
1580 | int segment, int newsize) | |
1581 | { | |
d0bfef31 CH |
1582 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; |
1583 | struct ptlrpc_sec_cops *cops; | |
1584 | struct lustre_msg *msg = req->rq_reqmsg; | |
d7e09d03 PT |
1585 | |
1586 | LASSERT(ctx); | |
1587 | LASSERT(msg); | |
1588 | LASSERT(msg->lm_bufcount > segment); | |
1589 | LASSERT(msg->lm_buflens[segment] <= newsize); | |
1590 | ||
1591 | if (msg->lm_buflens[segment] == newsize) | |
1592 | return 0; | |
1593 | ||
1594 | cops = ctx->cc_sec->ps_policy->sp_cops; | |
1595 | LASSERT(cops->enlarge_reqbuf); | |
1596 | return cops->enlarge_reqbuf(ctx->cc_sec, req, segment, newsize); | |
1597 | } | |
1598 | EXPORT_SYMBOL(sptlrpc_cli_enlarge_reqbuf); | |
1599 | ||
1600 | /** | |
1601 | * Used by ptlrpc client to allocate reply buffer of \a req. | |
1602 | * | |
1603 | * \note After this, req->rq_repmsg is still not accessible. | |
1604 | */ | |
1605 | int sptlrpc_cli_alloc_repbuf(struct ptlrpc_request *req, int msgsize) | |
1606 | { | |
1607 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1608 | struct ptlrpc_sec_policy *policy; | |
d7e09d03 PT |
1609 | |
1610 | LASSERT(ctx); | |
1611 | LASSERT(ctx->cc_sec); | |
1612 | LASSERT(ctx->cc_sec->ps_policy); | |
1613 | ||
1614 | if (req->rq_repbuf) | |
0a3bdb00 | 1615 | return 0; |
d7e09d03 PT |
1616 | |
1617 | policy = ctx->cc_sec->ps_policy; | |
0a3bdb00 | 1618 | return policy->sp_cops->alloc_repbuf(ctx->cc_sec, req, msgsize); |
d7e09d03 PT |
1619 | } |
1620 | ||
1621 | /** | |
1622 | * Used by ptlrpc client to free reply buffer of \a req. After this | |
1623 | * req->rq_repmsg is set to NULL and should not be accessed anymore. | |
1624 | */ | |
1625 | void sptlrpc_cli_free_repbuf(struct ptlrpc_request *req) | |
1626 | { | |
1627 | struct ptlrpc_cli_ctx *ctx = req->rq_cli_ctx; | |
1628 | struct ptlrpc_sec_policy *policy; | |
d7e09d03 PT |
1629 | |
1630 | LASSERT(ctx); | |
1631 | LASSERT(ctx->cc_sec); | |
1632 | LASSERT(ctx->cc_sec->ps_policy); | |
1633 | LASSERT_ATOMIC_POS(&ctx->cc_refcount); | |
1634 | ||
1635 | if (req->rq_repbuf == NULL) | |
1636 | return; | |
1637 | LASSERT(req->rq_repbuf_len); | |
1638 | ||
1639 | policy = ctx->cc_sec->ps_policy; | |
1640 | policy->sp_cops->free_repbuf(ctx->cc_sec, req); | |
1641 | req->rq_repmsg = NULL; | |
d7e09d03 PT |
1642 | } |
1643 | ||
be23ce1d SB |
1644 | static int sptlrpc_svc_install_rvs_ctx(struct obd_import *imp, |
1645 | struct ptlrpc_svc_ctx *ctx) | |
d7e09d03 PT |
1646 | { |
1647 | struct ptlrpc_sec_policy *policy = ctx->sc_policy; | |
1648 | ||
1649 | if (!policy->sp_sops->install_rctx) | |
1650 | return 0; | |
1651 | return policy->sp_sops->install_rctx(imp, ctx); | |
1652 | } | |
1653 | ||
1654 | /**************************************** | |
1655 | * server side security * | |
1656 | ****************************************/ | |
1657 | ||
1658 | static int flavor_allowed(struct sptlrpc_flavor *exp, | |
1659 | struct ptlrpc_request *req) | |
1660 | { | |
1661 | struct sptlrpc_flavor *flvr = &req->rq_flvr; | |
1662 | ||
1663 | if (exp->sf_rpc == SPTLRPC_FLVR_ANY || exp->sf_rpc == flvr->sf_rpc) | |
1664 | return 1; | |
1665 | ||
1666 | if ((req->rq_ctx_init || req->rq_ctx_fini) && | |
1667 | SPTLRPC_FLVR_POLICY(exp->sf_rpc) == | |
1668 | SPTLRPC_FLVR_POLICY(flvr->sf_rpc) && | |
1669 | SPTLRPC_FLVR_MECH(exp->sf_rpc) == SPTLRPC_FLVR_MECH(flvr->sf_rpc)) | |
1670 | return 1; | |
1671 | ||
1672 | return 0; | |
1673 | } | |
1674 | ||
1675 | #define EXP_FLVR_UPDATE_EXPIRE (OBD_TIMEOUT_DEFAULT + 10) | |
1676 | ||
1677 | /** | |
1678 | * Given an export \a exp, check whether the flavor of incoming \a req | |
1679 | * is allowed by the export \a exp. Main logic is about taking care of | |
1680 | * changing configurations. Return 0 means success. | |
1681 | */ | |
1682 | int sptlrpc_target_export_check(struct obd_export *exp, | |
1683 | struct ptlrpc_request *req) | |
1684 | { | |
d0bfef31 | 1685 | struct sptlrpc_flavor flavor; |
d7e09d03 PT |
1686 | |
1687 | if (exp == NULL) | |
1688 | return 0; | |
1689 | ||
1690 | /* client side export has no imp_reverse, skip | |
1691 | * FIXME maybe we should check flavor this as well??? */ | |
1692 | if (exp->exp_imp_reverse == NULL) | |
1693 | return 0; | |
1694 | ||
1695 | /* don't care about ctx fini rpc */ | |
1696 | if (req->rq_ctx_fini) | |
1697 | return 0; | |
1698 | ||
1699 | spin_lock(&exp->exp_lock); | |
1700 | ||
1701 | /* if flavor just changed (exp->exp_flvr_changed != 0), we wait for | |
1702 | * the first req with the new flavor, then treat it as current flavor, | |
1703 | * adapt reverse sec according to it. | |
1704 | * note the first rpc with new flavor might not be with root ctx, in | |
1705 | * which case delay the sec_adapt by leaving exp_flvr_adapt == 1. */ | |
1706 | if (unlikely(exp->exp_flvr_changed) && | |
1707 | flavor_allowed(&exp->exp_flvr_old[1], req)) { | |
1708 | /* make the new flavor as "current", and old ones as | |
1709 | * about-to-expire */ | |
1710 | CDEBUG(D_SEC, "exp %p: just changed: %x->%x\n", exp, | |
1711 | exp->exp_flvr.sf_rpc, exp->exp_flvr_old[1].sf_rpc); | |
1712 | flavor = exp->exp_flvr_old[1]; | |
1713 | exp->exp_flvr_old[1] = exp->exp_flvr_old[0]; | |
1714 | exp->exp_flvr_expire[1] = exp->exp_flvr_expire[0]; | |
1715 | exp->exp_flvr_old[0] = exp->exp_flvr; | |
986ef135 | 1716 | exp->exp_flvr_expire[0] = ktime_get_real_seconds() + |
d7e09d03 PT |
1717 | EXP_FLVR_UPDATE_EXPIRE; |
1718 | exp->exp_flvr = flavor; | |
1719 | ||
1720 | /* flavor change finished */ | |
1721 | exp->exp_flvr_changed = 0; | |
1722 | LASSERT(exp->exp_flvr_adapt == 1); | |
1723 | ||
1724 | /* if it's gss, we only interested in root ctx init */ | |
1725 | if (req->rq_auth_gss && | |
1726 | !(req->rq_ctx_init && | |
1727 | (req->rq_auth_usr_root || req->rq_auth_usr_mdt || | |
1728 | req->rq_auth_usr_ost))) { | |
1729 | spin_unlock(&exp->exp_lock); | |
1730 | CDEBUG(D_SEC, "is good but not root(%d:%d:%d:%d:%d)\n", | |
1731 | req->rq_auth_gss, req->rq_ctx_init, | |
1732 | req->rq_auth_usr_root, req->rq_auth_usr_mdt, | |
1733 | req->rq_auth_usr_ost); | |
1734 | return 0; | |
1735 | } | |
1736 | ||
1737 | exp->exp_flvr_adapt = 0; | |
1738 | spin_unlock(&exp->exp_lock); | |
1739 | ||
1740 | return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, | |
1741 | req->rq_svc_ctx, &flavor); | |
1742 | } | |
1743 | ||
1744 | /* if it equals to the current flavor, we accept it, but need to | |
1745 | * dealing with reverse sec/ctx */ | |
1746 | if (likely(flavor_allowed(&exp->exp_flvr, req))) { | |
1747 | /* most cases should return here, we only interested in | |
1748 | * gss root ctx init */ | |
1749 | if (!req->rq_auth_gss || !req->rq_ctx_init || | |
1750 | (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt && | |
1751 | !req->rq_auth_usr_ost)) { | |
1752 | spin_unlock(&exp->exp_lock); | |
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | /* if flavor just changed, we should not proceed, just leave | |
1757 | * it and current flavor will be discovered and replaced | |
1758 | * shortly, and let _this_ rpc pass through */ | |
1759 | if (exp->exp_flvr_changed) { | |
1760 | LASSERT(exp->exp_flvr_adapt); | |
1761 | spin_unlock(&exp->exp_lock); | |
1762 | return 0; | |
1763 | } | |
1764 | ||
1765 | if (exp->exp_flvr_adapt) { | |
1766 | exp->exp_flvr_adapt = 0; | |
1767 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): do delayed adapt\n", | |
1768 | exp, exp->exp_flvr.sf_rpc, | |
1769 | exp->exp_flvr_old[0].sf_rpc, | |
1770 | exp->exp_flvr_old[1].sf_rpc); | |
1771 | flavor = exp->exp_flvr; | |
1772 | spin_unlock(&exp->exp_lock); | |
1773 | ||
1774 | return sptlrpc_import_sec_adapt(exp->exp_imp_reverse, | |
1775 | req->rq_svc_ctx, | |
1776 | &flavor); | |
1777 | } else { | |
2d00bd17 JP |
1778 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): is current flavor, install rvs ctx\n", |
1779 | exp, exp->exp_flvr.sf_rpc, | |
d7e09d03 PT |
1780 | exp->exp_flvr_old[0].sf_rpc, |
1781 | exp->exp_flvr_old[1].sf_rpc); | |
1782 | spin_unlock(&exp->exp_lock); | |
1783 | ||
1784 | return sptlrpc_svc_install_rvs_ctx(exp->exp_imp_reverse, | |
1785 | req->rq_svc_ctx); | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | if (exp->exp_flvr_expire[0]) { | |
986ef135 | 1790 | if (exp->exp_flvr_expire[0] >= ktime_get_real_seconds()) { |
d7e09d03 | 1791 | if (flavor_allowed(&exp->exp_flvr_old[0], req)) { |
986ef135 | 1792 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the middle one (%lld)\n", exp, |
d7e09d03 PT |
1793 | exp->exp_flvr.sf_rpc, |
1794 | exp->exp_flvr_old[0].sf_rpc, | |
1795 | exp->exp_flvr_old[1].sf_rpc, | |
986ef135 AB |
1796 | (s64)(exp->exp_flvr_expire[0] - |
1797 | ktime_get_real_seconds())); | |
d7e09d03 PT |
1798 | spin_unlock(&exp->exp_lock); |
1799 | return 0; | |
1800 | } | |
1801 | } else { | |
1802 | CDEBUG(D_SEC, "mark middle expired\n"); | |
1803 | exp->exp_flvr_expire[0] = 0; | |
1804 | } | |
1805 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match middle\n", exp, | |
1806 | exp->exp_flvr.sf_rpc, | |
1807 | exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, | |
1808 | req->rq_flvr.sf_rpc); | |
1809 | } | |
1810 | ||
1811 | /* now it doesn't match the current flavor, the only chance we can | |
1812 | * accept it is match the old flavors which is not expired. */ | |
1813 | if (exp->exp_flvr_changed == 0 && exp->exp_flvr_expire[1]) { | |
986ef135 | 1814 | if (exp->exp_flvr_expire[1] >= ktime_get_real_seconds()) { |
d7e09d03 | 1815 | if (flavor_allowed(&exp->exp_flvr_old[1], req)) { |
986ef135 | 1816 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): match the oldest one (%lld)\n", |
2d00bd17 | 1817 | exp, |
d7e09d03 PT |
1818 | exp->exp_flvr.sf_rpc, |
1819 | exp->exp_flvr_old[0].sf_rpc, | |
1820 | exp->exp_flvr_old[1].sf_rpc, | |
986ef135 AB |
1821 | (s64)(exp->exp_flvr_expire[1] - |
1822 | ktime_get_real_seconds())); | |
d7e09d03 PT |
1823 | spin_unlock(&exp->exp_lock); |
1824 | return 0; | |
1825 | } | |
1826 | } else { | |
1827 | CDEBUG(D_SEC, "mark oldest expired\n"); | |
1828 | exp->exp_flvr_expire[1] = 0; | |
1829 | } | |
1830 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): %x not match found\n", | |
1831 | exp, exp->exp_flvr.sf_rpc, | |
1832 | exp->exp_flvr_old[0].sf_rpc, exp->exp_flvr_old[1].sf_rpc, | |
1833 | req->rq_flvr.sf_rpc); | |
1834 | } else { | |
1835 | CDEBUG(D_SEC, "exp %p (%x|%x|%x): skip the last one\n", | |
1836 | exp, exp->exp_flvr.sf_rpc, exp->exp_flvr_old[0].sf_rpc, | |
1837 | exp->exp_flvr_old[1].sf_rpc); | |
1838 | } | |
1839 | ||
1840 | spin_unlock(&exp->exp_lock); | |
1841 | ||
986ef135 | 1842 | 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 |
1843 | exp, exp->exp_obd->obd_name, |
1844 | req, req->rq_auth_gss, req->rq_ctx_init, req->rq_ctx_fini, | |
1845 | req->rq_auth_usr_root, req->rq_auth_usr_mdt, req->rq_auth_usr_ost, | |
1846 | req->rq_flvr.sf_rpc, | |
1847 | exp->exp_flvr.sf_rpc, | |
1848 | exp->exp_flvr_old[0].sf_rpc, | |
1849 | exp->exp_flvr_expire[0] ? | |
986ef135 | 1850 | (s64)(exp->exp_flvr_expire[0] - ktime_get_real_seconds()) : 0, |
d7e09d03 PT |
1851 | exp->exp_flvr_old[1].sf_rpc, |
1852 | exp->exp_flvr_expire[1] ? | |
986ef135 | 1853 | (s64)(exp->exp_flvr_expire[1] - ktime_get_real_seconds()) : 0); |
d7e09d03 PT |
1854 | return -EACCES; |
1855 | } | |
1856 | EXPORT_SYMBOL(sptlrpc_target_export_check); | |
1857 | ||
d7e09d03 PT |
1858 | static int sptlrpc_svc_check_from(struct ptlrpc_request *req, int svc_rc) |
1859 | { | |
1860 | /* peer's claim is unreliable unless gss is being used */ | |
1861 | if (!req->rq_auth_gss || svc_rc == SECSVC_DROP) | |
1862 | return svc_rc; | |
1863 | ||
1864 | switch (req->rq_sp_from) { | |
1865 | case LUSTRE_SP_CLI: | |
1866 | if (req->rq_auth_usr_mdt || req->rq_auth_usr_ost) { | |
1867 | DEBUG_REQ(D_ERROR, req, "faked source CLI"); | |
1868 | svc_rc = SECSVC_DROP; | |
1869 | } | |
1870 | break; | |
1871 | case LUSTRE_SP_MDT: | |
1872 | if (!req->rq_auth_usr_mdt) { | |
1873 | DEBUG_REQ(D_ERROR, req, "faked source MDT"); | |
1874 | svc_rc = SECSVC_DROP; | |
1875 | } | |
1876 | break; | |
1877 | case LUSTRE_SP_OST: | |
1878 | if (!req->rq_auth_usr_ost) { | |
1879 | DEBUG_REQ(D_ERROR, req, "faked source OST"); | |
1880 | svc_rc = SECSVC_DROP; | |
1881 | } | |
1882 | break; | |
1883 | case LUSTRE_SP_MGS: | |
1884 | case LUSTRE_SP_MGC: | |
1885 | if (!req->rq_auth_usr_root && !req->rq_auth_usr_mdt && | |
1886 | !req->rq_auth_usr_ost) { | |
1887 | DEBUG_REQ(D_ERROR, req, "faked source MGC/MGS"); | |
1888 | svc_rc = SECSVC_DROP; | |
1889 | } | |
1890 | break; | |
1891 | case LUSTRE_SP_ANY: | |
1892 | default: | |
1893 | DEBUG_REQ(D_ERROR, req, "invalid source %u", req->rq_sp_from); | |
1894 | svc_rc = SECSVC_DROP; | |
1895 | } | |
1896 | ||
1897 | return svc_rc; | |
1898 | } | |
1899 | ||
1900 | /** | |
1901 | * Used by ptlrpc server, to perform transformation upon request message of | |
1902 | * incoming \a req. This must be the first thing to do with a incoming | |
1903 | * request in ptlrpc layer. | |
1904 | * | |
1905 | * \retval SECSVC_OK success, and req->rq_reqmsg point to request message in | |
1906 | * clear text, size is req->rq_reqlen; also req->rq_svc_ctx is set. | |
1907 | * \retval SECSVC_COMPLETE success, the request has been fully processed, and | |
1908 | * reply message has been prepared. | |
1909 | * \retval SECSVC_DROP failed, this request should be dropped. | |
1910 | */ | |
1911 | int sptlrpc_svc_unwrap_request(struct ptlrpc_request *req) | |
1912 | { | |
1913 | struct ptlrpc_sec_policy *policy; | |
d0bfef31 CH |
1914 | struct lustre_msg *msg = req->rq_reqbuf; |
1915 | int rc; | |
d7e09d03 PT |
1916 | |
1917 | LASSERT(msg); | |
1918 | LASSERT(req->rq_reqmsg == NULL); | |
1919 | LASSERT(req->rq_repmsg == NULL); | |
1920 | LASSERT(req->rq_svc_ctx == NULL); | |
1921 | ||
1922 | req->rq_req_swab_mask = 0; | |
1923 | ||
1924 | rc = __lustre_unpack_msg(msg, req->rq_reqdata_len); | |
1925 | switch (rc) { | |
1926 | case 1: | |
1927 | lustre_set_req_swabbed(req, MSG_PTLRPC_HEADER_OFF); | |
1928 | case 0: | |
1929 | break; | |
1930 | default: | |
b0f5aad5 | 1931 | CERROR("error unpacking request from %s x%llu\n", |
d7e09d03 | 1932 | libcfs_id2str(req->rq_peer), req->rq_xid); |
0a3bdb00 | 1933 | return SECSVC_DROP; |
d7e09d03 PT |
1934 | } |
1935 | ||
1936 | req->rq_flvr.sf_rpc = WIRE_FLVR(msg->lm_secflvr); | |
1937 | req->rq_sp_from = LUSTRE_SP_ANY; | |
4b1a25f0 PT |
1938 | req->rq_auth_uid = -1; |
1939 | req->rq_auth_mapped_uid = -1; | |
d7e09d03 PT |
1940 | |
1941 | policy = sptlrpc_wireflavor2policy(req->rq_flvr.sf_rpc); | |
1942 | if (!policy) { | |
1943 | CERROR("unsupported rpc flavor %x\n", req->rq_flvr.sf_rpc); | |
0a3bdb00 | 1944 | return SECSVC_DROP; |
d7e09d03 PT |
1945 | } |
1946 | ||
1947 | LASSERT(policy->sp_sops->accept); | |
1948 | rc = policy->sp_sops->accept(req); | |
1949 | sptlrpc_policy_put(policy); | |
1950 | LASSERT(req->rq_reqmsg || rc != SECSVC_OK); | |
1951 | LASSERT(req->rq_svc_ctx || rc == SECSVC_DROP); | |
1952 | ||
1953 | /* | |
1954 | * if it's not null flavor (which means embedded packing msg), | |
0c2bc758 | 1955 | * reset the swab mask for the coming inner msg unpacking. |
d7e09d03 PT |
1956 | */ |
1957 | if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL) | |
1958 | req->rq_req_swab_mask = 0; | |
1959 | ||
1960 | /* sanity check for the request source */ | |
1961 | rc = sptlrpc_svc_check_from(req, rc); | |
0a3bdb00 | 1962 | return rc; |
d7e09d03 PT |
1963 | } |
1964 | ||
1965 | /** | |
1966 | * Used by ptlrpc server, to allocate reply buffer for \a req. If succeed, | |
1967 | * req->rq_reply_state is set, and req->rq_reply_state->rs_msg point to | |
1968 | * a buffer of \a msglen size. | |
1969 | */ | |
1970 | int sptlrpc_svc_alloc_rs(struct ptlrpc_request *req, int msglen) | |
1971 | { | |
1972 | struct ptlrpc_sec_policy *policy; | |
1973 | struct ptlrpc_reply_state *rs; | |
1974 | int rc; | |
d7e09d03 PT |
1975 | |
1976 | LASSERT(req->rq_svc_ctx); | |
1977 | LASSERT(req->rq_svc_ctx->sc_policy); | |
1978 | ||
1979 | policy = req->rq_svc_ctx->sc_policy; | |
1980 | LASSERT(policy->sp_sops->alloc_rs); | |
1981 | ||
1982 | rc = policy->sp_sops->alloc_rs(req, msglen); | |
1983 | if (unlikely(rc == -ENOMEM)) { | |
a34041af | 1984 | struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt; |
50ffcb7e | 1985 | |
a34041af PF |
1986 | if (svcpt->scp_service->srv_max_reply_size < |
1987 | msglen + sizeof(struct ptlrpc_reply_state)) { | |
1988 | /* Just return failure if the size is too big */ | |
1989 | CERROR("size of message is too big (%zd), %d allowed", | |
1990 | msglen + sizeof(struct ptlrpc_reply_state), | |
1991 | svcpt->scp_service->srv_max_reply_size); | |
1992 | return -ENOMEM; | |
1993 | } | |
1994 | ||
d7e09d03 | 1995 | /* failed alloc, try emergency pool */ |
a34041af | 1996 | rs = lustre_get_emerg_rs(svcpt); |
d7e09d03 | 1997 | if (rs == NULL) |
0a3bdb00 | 1998 | return -ENOMEM; |
d7e09d03 PT |
1999 | |
2000 | req->rq_reply_state = rs; | |
2001 | rc = policy->sp_sops->alloc_rs(req, msglen); | |
2002 | if (rc) { | |
2003 | lustre_put_emerg_rs(rs); | |
2004 | req->rq_reply_state = NULL; | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | LASSERT(rc != 0 || | |
2009 | (req->rq_reply_state && req->rq_reply_state->rs_msg)); | |
2010 | ||
0a3bdb00 | 2011 | return rc; |
d7e09d03 PT |
2012 | } |
2013 | ||
2014 | /** | |
2015 | * Used by ptlrpc server, to perform transformation upon reply message. | |
2016 | * | |
0c2bc758 | 2017 | * \post req->rq_reply_off is set to appropriate server-controlled reply offset. |
d7e09d03 PT |
2018 | * \post req->rq_repmsg and req->rq_reply_state->rs_msg becomes inaccessible. |
2019 | */ | |
2020 | int sptlrpc_svc_wrap_reply(struct ptlrpc_request *req) | |
2021 | { | |
2022 | struct ptlrpc_sec_policy *policy; | |
2023 | int rc; | |
d7e09d03 PT |
2024 | |
2025 | LASSERT(req->rq_svc_ctx); | |
2026 | LASSERT(req->rq_svc_ctx->sc_policy); | |
2027 | ||
2028 | policy = req->rq_svc_ctx->sc_policy; | |
2029 | LASSERT(policy->sp_sops->authorize); | |
2030 | ||
2031 | rc = policy->sp_sops->authorize(req); | |
2032 | LASSERT(rc || req->rq_reply_state->rs_repdata_len); | |
2033 | ||
0a3bdb00 | 2034 | return rc; |
d7e09d03 PT |
2035 | } |
2036 | ||
2037 | /** | |
2038 | * Used by ptlrpc server, to free reply_state. | |
2039 | */ | |
2040 | void sptlrpc_svc_free_rs(struct ptlrpc_reply_state *rs) | |
2041 | { | |
2042 | struct ptlrpc_sec_policy *policy; | |
2043 | unsigned int prealloc; | |
d7e09d03 PT |
2044 | |
2045 | LASSERT(rs->rs_svc_ctx); | |
2046 | LASSERT(rs->rs_svc_ctx->sc_policy); | |
2047 | ||
2048 | policy = rs->rs_svc_ctx->sc_policy; | |
2049 | LASSERT(policy->sp_sops->free_rs); | |
2050 | ||
2051 | prealloc = rs->rs_prealloc; | |
2052 | policy->sp_sops->free_rs(rs); | |
2053 | ||
2054 | if (prealloc) | |
2055 | lustre_put_emerg_rs(rs); | |
d7e09d03 PT |
2056 | } |
2057 | ||
2058 | void sptlrpc_svc_ctx_addref(struct ptlrpc_request *req) | |
2059 | { | |
2060 | struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx; | |
2061 | ||
2062 | if (ctx != NULL) | |
2063 | atomic_inc(&ctx->sc_refcount); | |
2064 | } | |
2065 | ||
2066 | void sptlrpc_svc_ctx_decref(struct ptlrpc_request *req) | |
2067 | { | |
2068 | struct ptlrpc_svc_ctx *ctx = req->rq_svc_ctx; | |
2069 | ||
2070 | if (ctx == NULL) | |
2071 | return; | |
2072 | ||
2073 | LASSERT_ATOMIC_POS(&ctx->sc_refcount); | |
2074 | if (atomic_dec_and_test(&ctx->sc_refcount)) { | |
2075 | if (ctx->sc_policy->sp_sops->free_ctx) | |
2076 | ctx->sc_policy->sp_sops->free_ctx(ctx); | |
2077 | } | |
2078 | req->rq_svc_ctx = NULL; | |
2079 | } | |
2080 | ||
d7e09d03 PT |
2081 | /**************************************** |
2082 | * bulk security * | |
2083 | ****************************************/ | |
2084 | ||
2085 | /** | |
2086 | * Perform transformation upon bulk data pointed by \a desc. This is called | |
2087 | * before transforming the request message. | |
2088 | */ | |
2089 | int sptlrpc_cli_wrap_bulk(struct ptlrpc_request *req, | |
2090 | struct ptlrpc_bulk_desc *desc) | |
2091 | { | |
2092 | struct ptlrpc_cli_ctx *ctx; | |
2093 | ||
2094 | LASSERT(req->rq_bulk_read || req->rq_bulk_write); | |
2095 | ||
2096 | if (!req->rq_pack_bulk) | |
2097 | return 0; | |
2098 | ||
2099 | ctx = req->rq_cli_ctx; | |
2100 | if (ctx->cc_ops->wrap_bulk) | |
2101 | return ctx->cc_ops->wrap_bulk(ctx, req, desc); | |
2102 | return 0; | |
2103 | } | |
2104 | EXPORT_SYMBOL(sptlrpc_cli_wrap_bulk); | |
2105 | ||
2106 | /** | |
2107 | * This is called after unwrap the reply message. | |
2108 | * return nob of actual plain text size received, or error code. | |
2109 | */ | |
2110 | int sptlrpc_cli_unwrap_bulk_read(struct ptlrpc_request *req, | |
2111 | struct ptlrpc_bulk_desc *desc, | |
2112 | int nob) | |
2113 | { | |
d0bfef31 CH |
2114 | struct ptlrpc_cli_ctx *ctx; |
2115 | int rc; | |
d7e09d03 PT |
2116 | |
2117 | LASSERT(req->rq_bulk_read && !req->rq_bulk_write); | |
2118 | ||
2119 | if (!req->rq_pack_bulk) | |
2120 | return desc->bd_nob_transferred; | |
2121 | ||
2122 | ctx = req->rq_cli_ctx; | |
2123 | if (ctx->cc_ops->unwrap_bulk) { | |
2124 | rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); | |
2125 | if (rc < 0) | |
2126 | return rc; | |
2127 | } | |
2128 | return desc->bd_nob_transferred; | |
2129 | } | |
2130 | EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_read); | |
2131 | ||
2132 | /** | |
2133 | * This is called after unwrap the reply message. | |
2134 | * return 0 for success or error code. | |
2135 | */ | |
2136 | int sptlrpc_cli_unwrap_bulk_write(struct ptlrpc_request *req, | |
2137 | struct ptlrpc_bulk_desc *desc) | |
2138 | { | |
d0bfef31 CH |
2139 | struct ptlrpc_cli_ctx *ctx; |
2140 | int rc; | |
d7e09d03 PT |
2141 | |
2142 | LASSERT(!req->rq_bulk_read && req->rq_bulk_write); | |
2143 | ||
2144 | if (!req->rq_pack_bulk) | |
2145 | return 0; | |
2146 | ||
2147 | ctx = req->rq_cli_ctx; | |
2148 | if (ctx->cc_ops->unwrap_bulk) { | |
2149 | rc = ctx->cc_ops->unwrap_bulk(ctx, req, desc); | |
2150 | if (rc < 0) | |
2151 | return rc; | |
2152 | } | |
2153 | ||
2154 | /* | |
2155 | * if everything is going right, nob should equals to nob_transferred. | |
2156 | * in case of privacy mode, nob_transferred needs to be adjusted. | |
2157 | */ | |
2158 | if (desc->bd_nob != desc->bd_nob_transferred) { | |
2159 | CERROR("nob %d doesn't match transferred nob %d", | |
2160 | desc->bd_nob, desc->bd_nob_transferred); | |
2161 | return -EPROTO; | |
2162 | } | |
2163 | ||
2164 | return 0; | |
2165 | } | |
2166 | EXPORT_SYMBOL(sptlrpc_cli_unwrap_bulk_write); | |
2167 | ||
d7e09d03 PT |
2168 | /**************************************** |
2169 | * user descriptor helpers * | |
2170 | ****************************************/ | |
2171 | ||
2172 | int sptlrpc_current_user_desc_size(void) | |
2173 | { | |
2174 | int ngroups; | |
2175 | ||
2176 | ngroups = current_ngroups; | |
2177 | ||
2178 | if (ngroups > LUSTRE_MAX_GROUPS) | |
2179 | ngroups = LUSTRE_MAX_GROUPS; | |
2180 | return sptlrpc_user_desc_size(ngroups); | |
2181 | } | |
2182 | EXPORT_SYMBOL(sptlrpc_current_user_desc_size); | |
2183 | ||
2184 | int sptlrpc_pack_user_desc(struct lustre_msg *msg, int offset) | |
2185 | { | |
2186 | struct ptlrpc_user_desc *pud; | |
2187 | ||
2188 | pud = lustre_msg_buf(msg, offset, 0); | |
2189 | ||
4b1a25f0 PT |
2190 | pud->pud_uid = from_kuid(&init_user_ns, current_uid()); |
2191 | pud->pud_gid = from_kgid(&init_user_ns, current_gid()); | |
2192 | pud->pud_fsuid = from_kuid(&init_user_ns, current_fsuid()); | |
2193 | pud->pud_fsgid = from_kgid(&init_user_ns, current_fsgid()); | |
d7e09d03 PT |
2194 | pud->pud_cap = cfs_curproc_cap_pack(); |
2195 | pud->pud_ngroups = (msg->lm_buflens[offset] - sizeof(*pud)) / 4; | |
2196 | ||
2197 | task_lock(current); | |
2198 | if (pud->pud_ngroups > current_ngroups) | |
2199 | pud->pud_ngroups = current_ngroups; | |
2200 | memcpy(pud->pud_groups, current_cred()->group_info->blocks[0], | |
2201 | pud->pud_ngroups * sizeof(__u32)); | |
2202 | task_unlock(current); | |
2203 | ||
2204 | return 0; | |
2205 | } | |
2206 | EXPORT_SYMBOL(sptlrpc_pack_user_desc); | |
2207 | ||
2208 | int sptlrpc_unpack_user_desc(struct lustre_msg *msg, int offset, int swabbed) | |
2209 | { | |
2210 | struct ptlrpc_user_desc *pud; | |
d0bfef31 | 2211 | int i; |
d7e09d03 PT |
2212 | |
2213 | pud = lustre_msg_buf(msg, offset, sizeof(*pud)); | |
2214 | if (!pud) | |
2215 | return -EINVAL; | |
2216 | ||
2217 | if (swabbed) { | |
2218 | __swab32s(&pud->pud_uid); | |
2219 | __swab32s(&pud->pud_gid); | |
2220 | __swab32s(&pud->pud_fsuid); | |
2221 | __swab32s(&pud->pud_fsgid); | |
2222 | __swab32s(&pud->pud_cap); | |
2223 | __swab32s(&pud->pud_ngroups); | |
2224 | } | |
2225 | ||
2226 | if (pud->pud_ngroups > LUSTRE_MAX_GROUPS) { | |
2227 | CERROR("%u groups is too large\n", pud->pud_ngroups); | |
2228 | return -EINVAL; | |
2229 | } | |
2230 | ||
2231 | if (sizeof(*pud) + pud->pud_ngroups * sizeof(__u32) > | |
2232 | msg->lm_buflens[offset]) { | |
2233 | CERROR("%u groups are claimed but bufsize only %u\n", | |
2234 | pud->pud_ngroups, msg->lm_buflens[offset]); | |
2235 | return -EINVAL; | |
2236 | } | |
2237 | ||
2238 | if (swabbed) { | |
2239 | for (i = 0; i < pud->pud_ngroups; i++) | |
2240 | __swab32s(&pud->pud_groups[i]); | |
2241 | } | |
2242 | ||
2243 | return 0; | |
2244 | } | |
2245 | EXPORT_SYMBOL(sptlrpc_unpack_user_desc); | |
2246 | ||
2247 | /**************************************** | |
2248 | * misc helpers * | |
2249 | ****************************************/ | |
2250 | ||
aff9d8e8 | 2251 | const char *sec2target_str(struct ptlrpc_sec *sec) |
d7e09d03 PT |
2252 | { |
2253 | if (!sec || !sec->ps_import || !sec->ps_import->imp_obd) | |
2254 | return "*"; | |
2255 | if (sec_is_reverse(sec)) | |
2256 | return "c"; | |
2257 | return obd_uuid2str(&sec->ps_import->imp_obd->u.cli.cl_target_uuid); | |
2258 | } | |
2259 | EXPORT_SYMBOL(sec2target_str); | |
2260 | ||
2261 | /* | |
2262 | * return true if the bulk data is protected | |
2263 | */ | |
316bd5e0 | 2264 | bool sptlrpc_flavor_has_bulk(struct sptlrpc_flavor *flvr) |
d7e09d03 PT |
2265 | { |
2266 | switch (SPTLRPC_FLVR_BULK_SVC(flvr->sf_rpc)) { | |
2267 | case SPTLRPC_BULK_SVC_INTG: | |
2268 | case SPTLRPC_BULK_SVC_PRIV: | |
316bd5e0 | 2269 | return true; |
d7e09d03 | 2270 | default: |
316bd5e0 | 2271 | return false; |
d7e09d03 PT |
2272 | } |
2273 | } | |
2274 | EXPORT_SYMBOL(sptlrpc_flavor_has_bulk); | |
2275 | ||
2276 | /**************************************** | |
2277 | * crypto API helper/alloc blkciper * | |
2278 | ****************************************/ | |
2279 | ||
2280 | /**************************************** | |
2281 | * initialize/finalize * | |
2282 | ****************************************/ | |
2283 | ||
2284 | int sptlrpc_init(void) | |
2285 | { | |
2286 | int rc; | |
2287 | ||
2288 | rwlock_init(&policy_lock); | |
2289 | ||
2290 | rc = sptlrpc_gc_init(); | |
2291 | if (rc) | |
2292 | goto out; | |
2293 | ||
2294 | rc = sptlrpc_conf_init(); | |
2295 | if (rc) | |
2296 | goto out_gc; | |
2297 | ||
2298 | rc = sptlrpc_enc_pool_init(); | |
2299 | if (rc) | |
2300 | goto out_conf; | |
2301 | ||
2302 | rc = sptlrpc_null_init(); | |
2303 | if (rc) | |
2304 | goto out_pool; | |
2305 | ||
2306 | rc = sptlrpc_plain_init(); | |
2307 | if (rc) | |
2308 | goto out_null; | |
2309 | ||
2310 | rc = sptlrpc_lproc_init(); | |
2311 | if (rc) | |
2312 | goto out_plain; | |
2313 | ||
2314 | return 0; | |
2315 | ||
2316 | out_plain: | |
2317 | sptlrpc_plain_fini(); | |
2318 | out_null: | |
2319 | sptlrpc_null_fini(); | |
2320 | out_pool: | |
2321 | sptlrpc_enc_pool_fini(); | |
2322 | out_conf: | |
2323 | sptlrpc_conf_fini(); | |
2324 | out_gc: | |
2325 | sptlrpc_gc_fini(); | |
2326 | out: | |
2327 | return rc; | |
2328 | } | |
2329 | ||
2330 | void sptlrpc_fini(void) | |
2331 | { | |
2332 | sptlrpc_lproc_fini(); | |
2333 | sptlrpc_plain_fini(); | |
2334 | sptlrpc_null_fini(); | |
2335 | sptlrpc_enc_pool_fini(); | |
2336 | sptlrpc_conf_fini(); | |
2337 | sptlrpc_gc_fini(); | |
2338 | } |