1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41#define DEBUG_SUBSYSTEM S_SEC
42
43
44#include <obd_support.h>
45#include <obd_cksum.h>
46#include <obd_class.h>
47#include <lustre_net.h>
48#include <lustre_sec.h>
49
50struct plain_sec {
51 struct ptlrpc_sec pls_base;
52 rwlock_t pls_lock;
53 struct ptlrpc_cli_ctx *pls_ctx;
54};
55
56static inline struct plain_sec *sec2plsec(struct ptlrpc_sec *sec)
57{
58 return container_of(sec, struct plain_sec, pls_base);
59}
60
61static struct ptlrpc_sec_policy plain_policy;
62static struct ptlrpc_ctx_ops plain_ctx_ops;
63static struct ptlrpc_svc_ctx plain_svc_ctx;
64
65static unsigned int plain_at_offset;
66
67
68
69
70#define PLAIN_PACK_SEGMENTS (4)
71
72#define PLAIN_PACK_HDR_OFF (0)
73#define PLAIN_PACK_MSG_OFF (1)
74#define PLAIN_PACK_USER_OFF (2)
75#define PLAIN_PACK_BULK_OFF (3)
76
77#define PLAIN_FL_USER (0x01)
78#define PLAIN_FL_BULK (0x02)
79
80struct plain_header {
81 __u8 ph_ver;
82 __u8 ph_flags;
83 __u8 ph_sp;
84 __u8 ph_bulk_hash_alg;
85 __u8 ph_pad[4];
86};
87
88struct plain_bulk_token {
89 __u8 pbt_hash[8];
90};
91
92#define PLAIN_BSD_SIZE \
93 (sizeof(struct ptlrpc_bulk_sec_desc) + sizeof(struct plain_bulk_token))
94
95
96
97
98
99static int plain_unpack_bsd(struct lustre_msg *msg, int swabbed)
100{
101 struct ptlrpc_bulk_sec_desc *bsd;
102
103 if (bulk_sec_desc_unpack(msg, PLAIN_PACK_BULK_OFF, swabbed))
104 return -EPROTO;
105
106 bsd = lustre_msg_buf(msg, PLAIN_PACK_BULK_OFF, PLAIN_BSD_SIZE);
107 if (bsd == NULL) {
108 CERROR("bulk sec desc has short size %d\n",
109 lustre_msg_buflen(msg, PLAIN_PACK_BULK_OFF));
110 return -EPROTO;
111 }
112
113 if (bsd->bsd_svc != SPTLRPC_BULK_SVC_NULL &&
114 bsd->bsd_svc != SPTLRPC_BULK_SVC_INTG) {
115 CERROR("invalid bulk svc %u\n", bsd->bsd_svc);
116 return -EPROTO;
117 }
118
119 return 0;
120}
121
122static int plain_generate_bulk_csum(struct ptlrpc_bulk_desc *desc,
123 __u8 hash_alg,
124 struct plain_bulk_token *token)
125{
126 if (hash_alg == BULK_HASH_ALG_NULL)
127 return 0;
128
129 memset(token->pbt_hash, 0, sizeof(token->pbt_hash));
130 return sptlrpc_get_bulk_checksum(desc, hash_alg, token->pbt_hash,
131 sizeof(token->pbt_hash));
132}
133
134static int plain_verify_bulk_csum(struct ptlrpc_bulk_desc *desc,
135 __u8 hash_alg,
136 struct plain_bulk_token *tokenr)
137{
138 struct plain_bulk_token tokenv;
139 int rc;
140
141 if (hash_alg == BULK_HASH_ALG_NULL)
142 return 0;
143
144 memset(&tokenv.pbt_hash, 0, sizeof(tokenv.pbt_hash));
145 rc = sptlrpc_get_bulk_checksum(desc, hash_alg, tokenv.pbt_hash,
146 sizeof(tokenv.pbt_hash));
147 if (rc)
148 return rc;
149
150 if (memcmp(tokenr->pbt_hash, tokenv.pbt_hash, sizeof(tokenr->pbt_hash)))
151 return -EACCES;
152 return 0;
153}
154
155static void corrupt_bulk_data(struct ptlrpc_bulk_desc *desc)
156{
157 char *ptr;
158 unsigned int off, i;
159
160 for (i = 0; i < desc->bd_iov_count; i++) {
161 if (desc->bd_iov[i].kiov_len == 0)
162 continue;
163
164 ptr = kmap(desc->bd_iov[i].kiov_page);
165 off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
166 ptr[off] ^= 0x1;
167 kunmap(desc->bd_iov[i].kiov_page);
168 return;
169 }
170}
171
172
173
174
175
176static
177int plain_ctx_refresh(struct ptlrpc_cli_ctx *ctx)
178{
179
180 LBUG();
181 return 0;
182}
183
184static
185int plain_ctx_validate(struct ptlrpc_cli_ctx *ctx)
186{
187 return 0;
188}
189
190static
191int plain_ctx_sign(struct ptlrpc_cli_ctx *ctx, struct ptlrpc_request *req)
192{
193 struct lustre_msg *msg = req->rq_reqbuf;
194 struct plain_header *phdr;
195
196 msg->lm_secflvr = req->rq_flvr.sf_rpc;
197
198 phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, 0);
199 phdr->ph_ver = 0;
200 phdr->ph_flags = 0;
201 phdr->ph_sp = ctx->cc_sec->ps_part;
202 phdr->ph_bulk_hash_alg = req->rq_flvr.u_bulk.hash.hash_alg;
203
204 if (req->rq_pack_udesc)
205 phdr->ph_flags |= PLAIN_FL_USER;
206 if (req->rq_pack_bulk)
207 phdr->ph_flags |= PLAIN_FL_BULK;
208
209 req->rq_reqdata_len = lustre_msg_size_v2(msg->lm_bufcount,
210 msg->lm_buflens);
211 return 0;
212}
213
214static
215int plain_ctx_verify(struct ptlrpc_cli_ctx *ctx, struct ptlrpc_request *req)
216{
217 struct lustre_msg *msg = req->rq_repdata;
218 struct plain_header *phdr;
219 __u32 cksum;
220 int swabbed;
221
222 if (msg->lm_bufcount != PLAIN_PACK_SEGMENTS) {
223 CERROR("unexpected reply buf count %u\n", msg->lm_bufcount);
224 return -EPROTO;
225 }
226
227 swabbed = ptlrpc_rep_need_swab(req);
228
229 phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, sizeof(*phdr));
230 if (phdr == NULL) {
231 CERROR("missing plain header\n");
232 return -EPROTO;
233 }
234
235 if (phdr->ph_ver != 0) {
236 CERROR("Invalid header version\n");
237 return -EPROTO;
238 }
239
240
241 if (phdr->ph_flags & PLAIN_FL_USER) {
242 CERROR("Unexpected udesc flag in reply\n");
243 return -EPROTO;
244 }
245
246 if (phdr->ph_bulk_hash_alg != req->rq_flvr.u_bulk.hash.hash_alg) {
247 CERROR("reply bulk flavor %u != %u\n", phdr->ph_bulk_hash_alg,
248 req->rq_flvr.u_bulk.hash.hash_alg);
249 return -EPROTO;
250 }
251
252 if (unlikely(req->rq_early)) {
253 unsigned int hsize = 4;
254
255 cfs_crypto_hash_digest(CFS_HASH_ALG_CRC32,
256 lustre_msg_buf(msg, PLAIN_PACK_MSG_OFF, 0),
257 lustre_msg_buflen(msg, PLAIN_PACK_MSG_OFF),
258 NULL, 0, (unsigned char *)&cksum, &hsize);
259 if (cksum != msg->lm_cksum) {
260 CDEBUG(D_SEC,
261 "early reply checksum mismatch: %08x != %08x\n",
262 cpu_to_le32(cksum), msg->lm_cksum);
263 return -EINVAL;
264 }
265 } else {
266
267
268 if (!req->rq_early &&
269 !equi(req->rq_pack_bulk == 1,
270 phdr->ph_flags & PLAIN_FL_BULK)) {
271 CERROR("%s bulk checksum in reply\n",
272 req->rq_pack_bulk ? "Missing" : "Unexpected");
273 return -EPROTO;
274 }
275
276 if (phdr->ph_flags & PLAIN_FL_BULK) {
277 if (plain_unpack_bsd(msg, swabbed))
278 return -EPROTO;
279 }
280 }
281
282 req->rq_repmsg = lustre_msg_buf(msg, PLAIN_PACK_MSG_OFF, 0);
283 req->rq_replen = lustre_msg_buflen(msg, PLAIN_PACK_MSG_OFF);
284 return 0;
285}
286
287static
288int plain_cli_wrap_bulk(struct ptlrpc_cli_ctx *ctx,
289 struct ptlrpc_request *req,
290 struct ptlrpc_bulk_desc *desc)
291{
292 struct ptlrpc_bulk_sec_desc *bsd;
293 struct plain_bulk_token *token;
294 int rc;
295
296 LASSERT(req->rq_pack_bulk);
297 LASSERT(req->rq_reqbuf->lm_bufcount == PLAIN_PACK_SEGMENTS);
298
299 bsd = lustre_msg_buf(req->rq_reqbuf, PLAIN_PACK_BULK_OFF, 0);
300 token = (struct plain_bulk_token *) bsd->bsd_data;
301
302 bsd->bsd_version = 0;
303 bsd->bsd_flags = 0;
304 bsd->bsd_type = SPTLRPC_BULK_DEFAULT;
305 bsd->bsd_svc = SPTLRPC_FLVR_BULK_SVC(req->rq_flvr.sf_rpc);
306
307 if (bsd->bsd_svc == SPTLRPC_BULK_SVC_NULL)
308 return 0;
309
310 if (req->rq_bulk_read)
311 return 0;
312
313 rc = plain_generate_bulk_csum(desc, req->rq_flvr.u_bulk.hash.hash_alg,
314 token);
315 if (rc) {
316 CERROR("bulk write: failed to compute checksum: %d\n", rc);
317 } else {
318
319
320
321
322 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND) &&
323 req->rq_flvr.u_bulk.hash.hash_alg != BULK_HASH_ALG_NULL)
324 token->pbt_hash[0] ^= 0x1;
325 }
326
327 return rc;
328}
329
330static
331int plain_cli_unwrap_bulk(struct ptlrpc_cli_ctx *ctx,
332 struct ptlrpc_request *req,
333 struct ptlrpc_bulk_desc *desc)
334{
335 struct ptlrpc_bulk_sec_desc *bsdv;
336 struct plain_bulk_token *tokenv;
337 int rc;
338 int i, nob;
339
340 LASSERT(req->rq_pack_bulk);
341 LASSERT(req->rq_reqbuf->lm_bufcount == PLAIN_PACK_SEGMENTS);
342 LASSERT(req->rq_repdata->lm_bufcount == PLAIN_PACK_SEGMENTS);
343
344 bsdv = lustre_msg_buf(req->rq_repdata, PLAIN_PACK_BULK_OFF, 0);
345 tokenv = (struct plain_bulk_token *) bsdv->bsd_data;
346
347 if (req->rq_bulk_write) {
348 if (bsdv->bsd_flags & BSD_FL_ERR)
349 return -EIO;
350 return 0;
351 }
352
353
354 for (i = 0, nob = 0; i < desc->bd_iov_count; i++) {
355 if (desc->bd_iov[i].kiov_len + nob > desc->bd_nob_transferred) {
356 desc->bd_iov[i].kiov_len =
357 desc->bd_nob_transferred - nob;
358 }
359 nob += desc->bd_iov[i].kiov_len;
360 }
361
362 rc = plain_verify_bulk_csum(desc, req->rq_flvr.u_bulk.hash.hash_alg,
363 tokenv);
364 if (rc)
365 CERROR("bulk read: client verify failed: %d\n", rc);
366
367 return rc;
368}
369
370
371
372
373
374static
375struct ptlrpc_cli_ctx *plain_sec_install_ctx(struct plain_sec *plsec)
376{
377 struct ptlrpc_cli_ctx *ctx, *ctx_new;
378
379 OBD_ALLOC_PTR(ctx_new);
380
381 write_lock(&plsec->pls_lock);
382
383 ctx = plsec->pls_ctx;
384 if (ctx) {
385 atomic_inc(&ctx->cc_refcount);
386
387 if (ctx_new)
388 OBD_FREE_PTR(ctx_new);
389 } else if (ctx_new) {
390 ctx = ctx_new;
391
392 atomic_set(&ctx->cc_refcount, 1);
393 ctx->cc_sec = &plsec->pls_base;
394 ctx->cc_ops = &plain_ctx_ops;
395 ctx->cc_expire = 0;
396 ctx->cc_flags = PTLRPC_CTX_CACHED | PTLRPC_CTX_UPTODATE;
397 ctx->cc_vcred.vc_uid = 0;
398 spin_lock_init(&ctx->cc_lock);
399 INIT_LIST_HEAD(&ctx->cc_req_list);
400 INIT_LIST_HEAD(&ctx->cc_gc_chain);
401
402 plsec->pls_ctx = ctx;
403 atomic_inc(&plsec->pls_base.ps_nctx);
404 atomic_inc(&plsec->pls_base.ps_refcount);
405
406 atomic_inc(&ctx->cc_refcount);
407 }
408
409 write_unlock(&plsec->pls_lock);
410
411 return ctx;
412}
413
414static
415void plain_destroy_sec(struct ptlrpc_sec *sec)
416{
417 struct plain_sec *plsec = sec2plsec(sec);
418
419 LASSERT(sec->ps_policy == &plain_policy);
420 LASSERT(sec->ps_import);
421 LASSERT(atomic_read(&sec->ps_refcount) == 0);
422 LASSERT(atomic_read(&sec->ps_nctx) == 0);
423 LASSERT(plsec->pls_ctx == NULL);
424
425 class_import_put(sec->ps_import);
426
427 OBD_FREE_PTR(plsec);
428}
429
430static
431void plain_kill_sec(struct ptlrpc_sec *sec)
432{
433 sec->ps_dying = 1;
434}
435
436static
437struct ptlrpc_sec *plain_create_sec(struct obd_import *imp,
438 struct ptlrpc_svc_ctx *svc_ctx,
439 struct sptlrpc_flavor *sf)
440{
441 struct plain_sec *plsec;
442 struct ptlrpc_sec *sec;
443 struct ptlrpc_cli_ctx *ctx;
444
445 LASSERT(SPTLRPC_FLVR_POLICY(sf->sf_rpc) == SPTLRPC_POLICY_PLAIN);
446
447 OBD_ALLOC_PTR(plsec);
448 if (plsec == NULL)
449 return NULL;
450
451
452
453
454 rwlock_init(&plsec->pls_lock);
455 plsec->pls_ctx = NULL;
456
457 sec = &plsec->pls_base;
458 sec->ps_policy = &plain_policy;
459 atomic_set(&sec->ps_refcount, 0);
460 atomic_set(&sec->ps_nctx, 0);
461 sec->ps_id = sptlrpc_get_next_secid();
462 sec->ps_import = class_import_get(imp);
463 sec->ps_flvr = *sf;
464 spin_lock_init(&sec->ps_lock);
465 INIT_LIST_HEAD(&sec->ps_gc_list);
466 sec->ps_gc_interval = 0;
467 sec->ps_gc_next = 0;
468
469
470 if (svc_ctx) {
471 ctx = plain_sec_install_ctx(plsec);
472 if (ctx == NULL) {
473 plain_destroy_sec(sec);
474 return NULL;
475 }
476 sptlrpc_cli_ctx_put(ctx, 1);
477 }
478
479 return sec;
480}
481
482static
483struct ptlrpc_cli_ctx *plain_lookup_ctx(struct ptlrpc_sec *sec,
484 struct vfs_cred *vcred,
485 int create, int remove_dead)
486{
487 struct plain_sec *plsec = sec2plsec(sec);
488 struct ptlrpc_cli_ctx *ctx;
489
490 read_lock(&plsec->pls_lock);
491 ctx = plsec->pls_ctx;
492 if (ctx)
493 atomic_inc(&ctx->cc_refcount);
494 read_unlock(&plsec->pls_lock);
495
496 if (unlikely(ctx == NULL))
497 ctx = plain_sec_install_ctx(plsec);
498
499 return ctx;
500}
501
502static
503void plain_release_ctx(struct ptlrpc_sec *sec,
504 struct ptlrpc_cli_ctx *ctx, int sync)
505{
506 LASSERT(atomic_read(&sec->ps_refcount) > 0);
507 LASSERT(atomic_read(&sec->ps_nctx) > 0);
508 LASSERT(atomic_read(&ctx->cc_refcount) == 0);
509 LASSERT(ctx->cc_sec == sec);
510
511 OBD_FREE_PTR(ctx);
512
513 atomic_dec(&sec->ps_nctx);
514 sptlrpc_sec_put(sec);
515}
516
517static
518int plain_flush_ctx_cache(struct ptlrpc_sec *sec,
519 uid_t uid, int grace, int force)
520{
521 struct plain_sec *plsec = sec2plsec(sec);
522 struct ptlrpc_cli_ctx *ctx;
523
524
525 if (uid != -1)
526 return 0;
527
528 write_lock(&plsec->pls_lock);
529 ctx = plsec->pls_ctx;
530 plsec->pls_ctx = NULL;
531 write_unlock(&plsec->pls_lock);
532
533 if (ctx)
534 sptlrpc_cli_ctx_put(ctx, 1);
535 return 0;
536}
537
538static
539int plain_alloc_reqbuf(struct ptlrpc_sec *sec,
540 struct ptlrpc_request *req,
541 int msgsize)
542{
543 __u32 buflens[PLAIN_PACK_SEGMENTS] = { 0, };
544 int alloc_len;
545
546 buflens[PLAIN_PACK_HDR_OFF] = sizeof(struct plain_header);
547 buflens[PLAIN_PACK_MSG_OFF] = msgsize;
548
549 if (req->rq_pack_udesc)
550 buflens[PLAIN_PACK_USER_OFF] = sptlrpc_current_user_desc_size();
551
552 if (req->rq_pack_bulk) {
553 LASSERT(req->rq_bulk_read || req->rq_bulk_write);
554 buflens[PLAIN_PACK_BULK_OFF] = PLAIN_BSD_SIZE;
555 }
556
557 alloc_len = lustre_msg_size_v2(PLAIN_PACK_SEGMENTS, buflens);
558
559 if (!req->rq_reqbuf) {
560 LASSERT(!req->rq_pool);
561
562 alloc_len = size_roundup_power2(alloc_len);
563 OBD_ALLOC_LARGE(req->rq_reqbuf, alloc_len);
564 if (!req->rq_reqbuf)
565 return -ENOMEM;
566
567 req->rq_reqbuf_len = alloc_len;
568 } else {
569 LASSERT(req->rq_pool);
570 LASSERT(req->rq_reqbuf_len >= alloc_len);
571 memset(req->rq_reqbuf, 0, alloc_len);
572 }
573
574 lustre_init_msg_v2(req->rq_reqbuf, PLAIN_PACK_SEGMENTS, buflens, NULL);
575 req->rq_reqmsg = lustre_msg_buf(req->rq_reqbuf, PLAIN_PACK_MSG_OFF, 0);
576
577 if (req->rq_pack_udesc)
578 sptlrpc_pack_user_desc(req->rq_reqbuf, PLAIN_PACK_USER_OFF);
579
580 return 0;
581}
582
583static
584void plain_free_reqbuf(struct ptlrpc_sec *sec,
585 struct ptlrpc_request *req)
586{
587 if (!req->rq_pool) {
588 OBD_FREE_LARGE(req->rq_reqbuf, req->rq_reqbuf_len);
589 req->rq_reqbuf = NULL;
590 req->rq_reqbuf_len = 0;
591 }
592}
593
594static
595int plain_alloc_repbuf(struct ptlrpc_sec *sec,
596 struct ptlrpc_request *req,
597 int msgsize)
598{
599 __u32 buflens[PLAIN_PACK_SEGMENTS] = { 0, };
600 int alloc_len;
601
602 buflens[PLAIN_PACK_HDR_OFF] = sizeof(struct plain_header);
603 buflens[PLAIN_PACK_MSG_OFF] = msgsize;
604
605 if (req->rq_pack_bulk) {
606 LASSERT(req->rq_bulk_read || req->rq_bulk_write);
607 buflens[PLAIN_PACK_BULK_OFF] = PLAIN_BSD_SIZE;
608 }
609
610 alloc_len = lustre_msg_size_v2(PLAIN_PACK_SEGMENTS, buflens);
611
612
613 alloc_len += plain_at_offset;
614
615 alloc_len = size_roundup_power2(alloc_len);
616
617 OBD_ALLOC_LARGE(req->rq_repbuf, alloc_len);
618 if (!req->rq_repbuf)
619 return -ENOMEM;
620
621 req->rq_repbuf_len = alloc_len;
622 return 0;
623}
624
625static
626void plain_free_repbuf(struct ptlrpc_sec *sec,
627 struct ptlrpc_request *req)
628{
629 OBD_FREE_LARGE(req->rq_repbuf, req->rq_repbuf_len);
630 req->rq_repbuf = NULL;
631 req->rq_repbuf_len = 0;
632}
633
634static
635int plain_enlarge_reqbuf(struct ptlrpc_sec *sec,
636 struct ptlrpc_request *req,
637 int segment, int newsize)
638{
639 struct lustre_msg *newbuf;
640 int oldsize;
641 int newmsg_size, newbuf_size;
642
643 LASSERT(req->rq_reqbuf);
644 LASSERT(req->rq_reqbuf_len >= req->rq_reqlen);
645 LASSERT(lustre_msg_buf(req->rq_reqbuf, PLAIN_PACK_MSG_OFF, 0) ==
646 req->rq_reqmsg);
647
648
649 oldsize = req->rq_reqmsg->lm_buflens[segment];
650 req->rq_reqmsg->lm_buflens[segment] = newsize;
651 newmsg_size = lustre_msg_size_v2(req->rq_reqmsg->lm_bufcount,
652 req->rq_reqmsg->lm_buflens);
653 req->rq_reqmsg->lm_buflens[segment] = oldsize;
654
655
656 oldsize = req->rq_reqbuf->lm_buflens[PLAIN_PACK_MSG_OFF];
657 req->rq_reqbuf->lm_buflens[PLAIN_PACK_MSG_OFF] = newmsg_size;
658 newbuf_size = lustre_msg_size_v2(req->rq_reqbuf->lm_bufcount,
659 req->rq_reqbuf->lm_buflens);
660 req->rq_reqbuf->lm_buflens[PLAIN_PACK_MSG_OFF] = oldsize;
661
662
663 LASSERT(!req->rq_pool || req->rq_reqbuf_len >= newbuf_size);
664
665 if (req->rq_reqbuf_len < newbuf_size) {
666 newbuf_size = size_roundup_power2(newbuf_size);
667
668 OBD_ALLOC_LARGE(newbuf, newbuf_size);
669 if (newbuf == NULL)
670 return -ENOMEM;
671
672 memcpy(newbuf, req->rq_reqbuf, req->rq_reqbuf_len);
673
674 OBD_FREE_LARGE(req->rq_reqbuf, req->rq_reqbuf_len);
675 req->rq_reqbuf = newbuf;
676 req->rq_reqbuf_len = newbuf_size;
677 req->rq_reqmsg = lustre_msg_buf(req->rq_reqbuf,
678 PLAIN_PACK_MSG_OFF, 0);
679 }
680
681 _sptlrpc_enlarge_msg_inplace(req->rq_reqbuf, PLAIN_PACK_MSG_OFF,
682 newmsg_size);
683 _sptlrpc_enlarge_msg_inplace(req->rq_reqmsg, segment, newsize);
684
685 req->rq_reqlen = newmsg_size;
686 return 0;
687}
688
689
690
691
692
693static struct ptlrpc_svc_ctx plain_svc_ctx = {
694 .sc_refcount = ATOMIC_INIT(1),
695 .sc_policy = &plain_policy,
696};
697
698static
699int plain_accept(struct ptlrpc_request *req)
700{
701 struct lustre_msg *msg = req->rq_reqbuf;
702 struct plain_header *phdr;
703 int swabbed;
704
705 LASSERT(SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) ==
706 SPTLRPC_POLICY_PLAIN);
707
708 if (SPTLRPC_FLVR_BASE(req->rq_flvr.sf_rpc) !=
709 SPTLRPC_FLVR_BASE(SPTLRPC_FLVR_PLAIN) ||
710 SPTLRPC_FLVR_BULK_TYPE(req->rq_flvr.sf_rpc) !=
711 SPTLRPC_FLVR_BULK_TYPE(SPTLRPC_FLVR_PLAIN)) {
712 CERROR("Invalid rpc flavor %x\n", req->rq_flvr.sf_rpc);
713 return SECSVC_DROP;
714 }
715
716 if (msg->lm_bufcount < PLAIN_PACK_SEGMENTS) {
717 CERROR("unexpected request buf count %u\n", msg->lm_bufcount);
718 return SECSVC_DROP;
719 }
720
721 swabbed = ptlrpc_req_need_swab(req);
722
723 phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, sizeof(*phdr));
724 if (phdr == NULL) {
725 CERROR("missing plain header\n");
726 return -EPROTO;
727 }
728
729 if (phdr->ph_ver != 0) {
730 CERROR("Invalid header version\n");
731 return -EPROTO;
732 }
733
734 if (phdr->ph_bulk_hash_alg >= BULK_HASH_ALG_MAX) {
735 CERROR("invalid hash algorithm: %u\n", phdr->ph_bulk_hash_alg);
736 return -EPROTO;
737 }
738
739 req->rq_sp_from = phdr->ph_sp;
740 req->rq_flvr.u_bulk.hash.hash_alg = phdr->ph_bulk_hash_alg;
741
742 if (phdr->ph_flags & PLAIN_FL_USER) {
743 if (sptlrpc_unpack_user_desc(msg, PLAIN_PACK_USER_OFF,
744 swabbed)) {
745 CERROR("Mal-formed user descriptor\n");
746 return SECSVC_DROP;
747 }
748
749 req->rq_pack_udesc = 1;
750 req->rq_user_desc = lustre_msg_buf(msg, PLAIN_PACK_USER_OFF, 0);
751 }
752
753 if (phdr->ph_flags & PLAIN_FL_BULK) {
754 if (plain_unpack_bsd(msg, swabbed))
755 return SECSVC_DROP;
756
757 req->rq_pack_bulk = 1;
758 }
759
760 req->rq_reqmsg = lustre_msg_buf(msg, PLAIN_PACK_MSG_OFF, 0);
761 req->rq_reqlen = msg->lm_buflens[PLAIN_PACK_MSG_OFF];
762
763 req->rq_svc_ctx = &plain_svc_ctx;
764 atomic_inc(&req->rq_svc_ctx->sc_refcount);
765
766 return SECSVC_OK;
767}
768
769static
770int plain_alloc_rs(struct ptlrpc_request *req, int msgsize)
771{
772 struct ptlrpc_reply_state *rs;
773 __u32 buflens[PLAIN_PACK_SEGMENTS] = { 0, };
774 int rs_size = sizeof(*rs);
775
776 LASSERT(msgsize % 8 == 0);
777
778 buflens[PLAIN_PACK_HDR_OFF] = sizeof(struct plain_header);
779 buflens[PLAIN_PACK_MSG_OFF] = msgsize;
780
781 if (req->rq_pack_bulk && (req->rq_bulk_read || req->rq_bulk_write))
782 buflens[PLAIN_PACK_BULK_OFF] = PLAIN_BSD_SIZE;
783
784 rs_size += lustre_msg_size_v2(PLAIN_PACK_SEGMENTS, buflens);
785
786 rs = req->rq_reply_state;
787
788 if (rs) {
789
790 LASSERT(rs->rs_size >= rs_size);
791 } else {
792 OBD_ALLOC_LARGE(rs, rs_size);
793 if (rs == NULL)
794 return -ENOMEM;
795
796 rs->rs_size = rs_size;
797 }
798
799 rs->rs_svc_ctx = req->rq_svc_ctx;
800 atomic_inc(&req->rq_svc_ctx->sc_refcount);
801 rs->rs_repbuf = (struct lustre_msg *) (rs + 1);
802 rs->rs_repbuf_len = rs_size - sizeof(*rs);
803
804 lustre_init_msg_v2(rs->rs_repbuf, PLAIN_PACK_SEGMENTS, buflens, NULL);
805 rs->rs_msg = lustre_msg_buf_v2(rs->rs_repbuf, PLAIN_PACK_MSG_OFF, 0);
806
807 req->rq_reply_state = rs;
808 return 0;
809}
810
811static
812void plain_free_rs(struct ptlrpc_reply_state *rs)
813{
814 LASSERT(atomic_read(&rs->rs_svc_ctx->sc_refcount) > 1);
815 atomic_dec(&rs->rs_svc_ctx->sc_refcount);
816
817 if (!rs->rs_prealloc)
818 OBD_FREE_LARGE(rs, rs->rs_size);
819}
820
821static
822int plain_authorize(struct ptlrpc_request *req)
823{
824 struct ptlrpc_reply_state *rs = req->rq_reply_state;
825 struct lustre_msg_v2 *msg = rs->rs_repbuf;
826 struct plain_header *phdr;
827 int len;
828
829 LASSERT(rs);
830 LASSERT(msg);
831
832 if (req->rq_replen != msg->lm_buflens[PLAIN_PACK_MSG_OFF])
833 len = lustre_shrink_msg(msg, PLAIN_PACK_MSG_OFF,
834 req->rq_replen, 1);
835 else
836 len = lustre_msg_size_v2(msg->lm_bufcount, msg->lm_buflens);
837
838 msg->lm_secflvr = req->rq_flvr.sf_rpc;
839
840 phdr = lustre_msg_buf(msg, PLAIN_PACK_HDR_OFF, 0);
841 phdr->ph_ver = 0;
842 phdr->ph_flags = 0;
843 phdr->ph_bulk_hash_alg = req->rq_flvr.u_bulk.hash.hash_alg;
844
845 if (req->rq_pack_bulk)
846 phdr->ph_flags |= PLAIN_FL_BULK;
847
848 rs->rs_repdata_len = len;
849
850 if (likely(req->rq_packed_final)) {
851 if (lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)
852 req->rq_reply_off = plain_at_offset;
853 else
854 req->rq_reply_off = 0;
855 } else {
856 unsigned int hsize = 4;
857
858 cfs_crypto_hash_digest(CFS_HASH_ALG_CRC32,
859 lustre_msg_buf(msg, PLAIN_PACK_MSG_OFF, 0),
860 lustre_msg_buflen(msg, PLAIN_PACK_MSG_OFF),
861 NULL, 0, (unsigned char *)&msg->lm_cksum, &hsize);
862 req->rq_reply_off = 0;
863 }
864
865 return 0;
866}
867
868static
869int plain_svc_unwrap_bulk(struct ptlrpc_request *req,
870 struct ptlrpc_bulk_desc *desc)
871{
872 struct ptlrpc_reply_state *rs = req->rq_reply_state;
873 struct ptlrpc_bulk_sec_desc *bsdr, *bsdv;
874 struct plain_bulk_token *tokenr;
875 int rc;
876
877 LASSERT(req->rq_bulk_write);
878 LASSERT(req->rq_pack_bulk);
879
880 bsdr = lustre_msg_buf(req->rq_reqbuf, PLAIN_PACK_BULK_OFF, 0);
881 tokenr = (struct plain_bulk_token *) bsdr->bsd_data;
882 bsdv = lustre_msg_buf(rs->rs_repbuf, PLAIN_PACK_BULK_OFF, 0);
883
884 bsdv->bsd_version = 0;
885 bsdv->bsd_type = SPTLRPC_BULK_DEFAULT;
886 bsdv->bsd_svc = bsdr->bsd_svc;
887 bsdv->bsd_flags = 0;
888
889 if (bsdr->bsd_svc == SPTLRPC_BULK_SVC_NULL)
890 return 0;
891
892 rc = plain_verify_bulk_csum(desc, req->rq_flvr.u_bulk.hash.hash_alg,
893 tokenr);
894 if (rc) {
895 bsdv->bsd_flags |= BSD_FL_ERR;
896 CERROR("bulk write: server verify failed: %d\n", rc);
897 }
898
899 return rc;
900}
901
902static
903int plain_svc_wrap_bulk(struct ptlrpc_request *req,
904 struct ptlrpc_bulk_desc *desc)
905{
906 struct ptlrpc_reply_state *rs = req->rq_reply_state;
907 struct ptlrpc_bulk_sec_desc *bsdr, *bsdv;
908 struct plain_bulk_token *tokenv;
909 int rc;
910
911 LASSERT(req->rq_bulk_read);
912 LASSERT(req->rq_pack_bulk);
913
914 bsdr = lustre_msg_buf(req->rq_reqbuf, PLAIN_PACK_BULK_OFF, 0);
915 bsdv = lustre_msg_buf(rs->rs_repbuf, PLAIN_PACK_BULK_OFF, 0);
916 tokenv = (struct plain_bulk_token *) bsdv->bsd_data;
917
918 bsdv->bsd_version = 0;
919 bsdv->bsd_type = SPTLRPC_BULK_DEFAULT;
920 bsdv->bsd_svc = bsdr->bsd_svc;
921 bsdv->bsd_flags = 0;
922
923 if (bsdr->bsd_svc == SPTLRPC_BULK_SVC_NULL)
924 return 0;
925
926 rc = plain_generate_bulk_csum(desc, req->rq_flvr.u_bulk.hash.hash_alg,
927 tokenv);
928 if (rc) {
929 CERROR("bulk read: server failed to compute "
930 "checksum: %d\n", rc);
931 } else {
932 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
933 corrupt_bulk_data(desc);
934 }
935
936 return rc;
937}
938
939static struct ptlrpc_ctx_ops plain_ctx_ops = {
940 .refresh = plain_ctx_refresh,
941 .validate = plain_ctx_validate,
942 .sign = plain_ctx_sign,
943 .verify = plain_ctx_verify,
944 .wrap_bulk = plain_cli_wrap_bulk,
945 .unwrap_bulk = plain_cli_unwrap_bulk,
946};
947
948static struct ptlrpc_sec_cops plain_sec_cops = {
949 .create_sec = plain_create_sec,
950 .destroy_sec = plain_destroy_sec,
951 .kill_sec = plain_kill_sec,
952 .lookup_ctx = plain_lookup_ctx,
953 .release_ctx = plain_release_ctx,
954 .flush_ctx_cache = plain_flush_ctx_cache,
955 .alloc_reqbuf = plain_alloc_reqbuf,
956 .free_reqbuf = plain_free_reqbuf,
957 .alloc_repbuf = plain_alloc_repbuf,
958 .free_repbuf = plain_free_repbuf,
959 .enlarge_reqbuf = plain_enlarge_reqbuf,
960};
961
962static struct ptlrpc_sec_sops plain_sec_sops = {
963 .accept = plain_accept,
964 .alloc_rs = plain_alloc_rs,
965 .authorize = plain_authorize,
966 .free_rs = plain_free_rs,
967 .unwrap_bulk = plain_svc_unwrap_bulk,
968 .wrap_bulk = plain_svc_wrap_bulk,
969};
970
971static struct ptlrpc_sec_policy plain_policy = {
972 .sp_owner = THIS_MODULE,
973 .sp_name = "plain",
974 .sp_policy = SPTLRPC_POLICY_PLAIN,
975 .sp_cops = &plain_sec_cops,
976 .sp_sops = &plain_sec_sops,
977};
978
979int sptlrpc_plain_init(void)
980{
981 __u32 buflens[PLAIN_PACK_SEGMENTS] = { 0, };
982 int rc;
983
984 buflens[PLAIN_PACK_MSG_OFF] = lustre_msg_early_size();
985 plain_at_offset = lustre_msg_size_v2(PLAIN_PACK_SEGMENTS, buflens);
986
987 rc = sptlrpc_register_policy(&plain_policy);
988 if (rc)
989 CERROR("failed to register: %d\n", rc);
990
991 return rc;
992}
993
994void sptlrpc_plain_fini(void)
995{
996 int rc;
997
998 rc = sptlrpc_unregister_policy(&plain_policy);
999 if (rc)
1000 CERROR("cannot unregister: %d\n", rc);
1001}
1002
