This source file includes following definitions.
- afs_cm_incoming_call
- afs_record_cm_probe
- afs_find_cm_server_by_peer
- afs_find_cm_server_by_uuid
- afs_cm_destructor
- afs_abort_service_call
- SRXAFSCB_CallBack
- afs_deliver_cb_callback
- SRXAFSCB_InitCallBackState
- afs_deliver_cb_init_call_back_state
- afs_deliver_cb_init_call_back_state3
- SRXAFSCB_Probe
- afs_deliver_cb_probe
- SRXAFSCB_ProbeUuid
- afs_deliver_cb_probe_uuid
- SRXAFSCB_TellMeAboutYourself
- afs_deliver_cb_tell_me_about_yourself
- afs_deliver_yfs_cb_callback
1
2
3
4
5
6
7
8 #include <linux/module.h>
9 #include <linux/init.h>
10 #include <linux/slab.h>
11 #include <linux/sched.h>
12 #include <linux/ip.h>
13 #include "internal.h"
14 #include "afs_cm.h"
15 #include "protocol_yfs.h"
16
17 static int afs_deliver_cb_init_call_back_state(struct afs_call *);
18 static int afs_deliver_cb_init_call_back_state3(struct afs_call *);
19 static int afs_deliver_cb_probe(struct afs_call *);
20 static int afs_deliver_cb_callback(struct afs_call *);
21 static int afs_deliver_cb_probe_uuid(struct afs_call *);
22 static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *);
23 static void afs_cm_destructor(struct afs_call *);
24 static void SRXAFSCB_CallBack(struct work_struct *);
25 static void SRXAFSCB_InitCallBackState(struct work_struct *);
26 static void SRXAFSCB_Probe(struct work_struct *);
27 static void SRXAFSCB_ProbeUuid(struct work_struct *);
28 static void SRXAFSCB_TellMeAboutYourself(struct work_struct *);
29
30 static int afs_deliver_yfs_cb_callback(struct afs_call *);
31
32 #define CM_NAME(name) \
33 char afs_SRXCB##name##_name[] __tracepoint_string = \
34 "CB." #name
35
36
37
38
39 static CM_NAME(CallBack);
40 static const struct afs_call_type afs_SRXCBCallBack = {
41 .name = afs_SRXCBCallBack_name,
42 .deliver = afs_deliver_cb_callback,
43 .destructor = afs_cm_destructor,
44 .work = SRXAFSCB_CallBack,
45 };
46
47
48
49
50 static CM_NAME(InitCallBackState);
51 static const struct afs_call_type afs_SRXCBInitCallBackState = {
52 .name = afs_SRXCBInitCallBackState_name,
53 .deliver = afs_deliver_cb_init_call_back_state,
54 .destructor = afs_cm_destructor,
55 .work = SRXAFSCB_InitCallBackState,
56 };
57
58
59
60
61 static CM_NAME(InitCallBackState3);
62 static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
63 .name = afs_SRXCBInitCallBackState3_name,
64 .deliver = afs_deliver_cb_init_call_back_state3,
65 .destructor = afs_cm_destructor,
66 .work = SRXAFSCB_InitCallBackState,
67 };
68
69
70
71
72 static CM_NAME(Probe);
73 static const struct afs_call_type afs_SRXCBProbe = {
74 .name = afs_SRXCBProbe_name,
75 .deliver = afs_deliver_cb_probe,
76 .destructor = afs_cm_destructor,
77 .work = SRXAFSCB_Probe,
78 };
79
80
81
82
83 static CM_NAME(ProbeUuid);
84 static const struct afs_call_type afs_SRXCBProbeUuid = {
85 .name = afs_SRXCBProbeUuid_name,
86 .deliver = afs_deliver_cb_probe_uuid,
87 .destructor = afs_cm_destructor,
88 .work = SRXAFSCB_ProbeUuid,
89 };
90
91
92
93
94 static CM_NAME(TellMeAboutYourself);
95 static const struct afs_call_type afs_SRXCBTellMeAboutYourself = {
96 .name = afs_SRXCBTellMeAboutYourself_name,
97 .deliver = afs_deliver_cb_tell_me_about_yourself,
98 .destructor = afs_cm_destructor,
99 .work = SRXAFSCB_TellMeAboutYourself,
100 };
101
102
103
104
105 static CM_NAME(YFS_CallBack);
106 static const struct afs_call_type afs_SRXYFSCB_CallBack = {
107 .name = afs_SRXCBYFS_CallBack_name,
108 .deliver = afs_deliver_yfs_cb_callback,
109 .destructor = afs_cm_destructor,
110 .work = SRXAFSCB_CallBack,
111 };
112
113
114
115
116
117 bool afs_cm_incoming_call(struct afs_call *call)
118 {
119 _enter("{%u, CB.OP %u}", call->service_id, call->operation_ID);
120
121 call->epoch = rxrpc_kernel_get_epoch(call->net->socket, call->rxcall);
122
123 switch (call->operation_ID) {
124 case CBCallBack:
125 call->type = &afs_SRXCBCallBack;
126 return true;
127 case CBInitCallBackState:
128 call->type = &afs_SRXCBInitCallBackState;
129 return true;
130 case CBInitCallBackState3:
131 call->type = &afs_SRXCBInitCallBackState3;
132 return true;
133 case CBProbe:
134 call->type = &afs_SRXCBProbe;
135 return true;
136 case CBProbeUuid:
137 call->type = &afs_SRXCBProbeUuid;
138 return true;
139 case CBTellMeAboutYourself:
140 call->type = &afs_SRXCBTellMeAboutYourself;
141 return true;
142 case YFSCBCallBack:
143 if (call->service_id != YFS_CM_SERVICE)
144 return false;
145 call->type = &afs_SRXYFSCB_CallBack;
146 return true;
147 default:
148 return false;
149 }
150 }
151
152
153
154
155 static int afs_record_cm_probe(struct afs_call *call, struct afs_server *server)
156 {
157 _enter("");
158
159 if (test_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags) &&
160 !test_bit(AFS_SERVER_FL_PROBING, &server->flags)) {
161 if (server->cm_epoch == call->epoch)
162 return 0;
163
164 if (!server->probe.said_rebooted) {
165 pr_notice("kAFS: FS rebooted %pU\n", &server->uuid);
166 server->probe.said_rebooted = true;
167 }
168 }
169
170 spin_lock(&server->probe_lock);
171
172 if (!test_and_set_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags)) {
173 server->cm_epoch = call->epoch;
174 server->probe.cm_epoch = call->epoch;
175 goto out;
176 }
177
178 if (server->probe.cm_probed &&
179 call->epoch != server->probe.cm_epoch &&
180 !server->probe.said_inconsistent) {
181 pr_notice("kAFS: FS endpoints inconsistent %pU\n",
182 &server->uuid);
183 server->probe.said_inconsistent = true;
184 }
185
186 if (!server->probe.cm_probed || call->epoch == server->cm_epoch)
187 server->probe.cm_epoch = server->cm_epoch;
188
189 out:
190 server->probe.cm_probed = true;
191 spin_unlock(&server->probe_lock);
192 return 0;
193 }
194
195
196
197
198
199 static int afs_find_cm_server_by_peer(struct afs_call *call)
200 {
201 struct sockaddr_rxrpc srx;
202 struct afs_server *server;
203
204 rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
205
206 server = afs_find_server(call->net, &srx);
207 if (!server) {
208 trace_afs_cm_no_server(call, &srx);
209 return 0;
210 }
211
212 call->server = server;
213 return afs_record_cm_probe(call, server);
214 }
215
216
217
218
219
220 static int afs_find_cm_server_by_uuid(struct afs_call *call,
221 struct afs_uuid *uuid)
222 {
223 struct afs_server *server;
224
225 rcu_read_lock();
226 server = afs_find_server_by_uuid(call->net, call->request);
227 rcu_read_unlock();
228 if (!server) {
229 trace_afs_cm_no_server_u(call, call->request);
230 return 0;
231 }
232
233 call->server = server;
234 return afs_record_cm_probe(call, server);
235 }
236
237
238
239
240 static void afs_cm_destructor(struct afs_call *call)
241 {
242 kfree(call->buffer);
243 call->buffer = NULL;
244 }
245
246
247
248
249 static void afs_abort_service_call(struct afs_call *call, u32 abort_code, int error,
250 const char *why)
251 {
252 rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
253 abort_code, error, why);
254 afs_set_call_complete(call, error, 0);
255 }
256
257
258
259
260 static void SRXAFSCB_CallBack(struct work_struct *work)
261 {
262 struct afs_call *call = container_of(work, struct afs_call, work);
263
264 _enter("");
265
266
267
268
269
270 if (call->server) {
271 trace_afs_server(call->server, atomic_read(&call->server->usage),
272 afs_server_trace_callback);
273 afs_break_callbacks(call->server, call->count, call->request);
274 }
275
276 afs_send_empty_reply(call);
277 afs_put_call(call);
278 _leave("");
279 }
280
281
282
283
284 static int afs_deliver_cb_callback(struct afs_call *call)
285 {
286 struct afs_callback_break *cb;
287 __be32 *bp;
288 int ret, loop;
289
290 _enter("{%u}", call->unmarshall);
291
292 switch (call->unmarshall) {
293 case 0:
294 afs_extract_to_tmp(call);
295 call->unmarshall++;
296
297
298
299 case 1:
300 _debug("extract FID count");
301 ret = afs_extract_data(call, true);
302 if (ret < 0)
303 return ret;
304
305 call->count = ntohl(call->tmp);
306 _debug("FID count: %u", call->count);
307 if (call->count > AFSCBMAX)
308 return afs_protocol_error(call, -EBADMSG,
309 afs_eproto_cb_fid_count);
310
311 call->buffer = kmalloc(array3_size(call->count, 3, 4),
312 GFP_KERNEL);
313 if (!call->buffer)
314 return -ENOMEM;
315 afs_extract_to_buf(call, call->count * 3 * 4);
316 call->unmarshall++;
317
318
319 case 2:
320 _debug("extract FID array");
321 ret = afs_extract_data(call, true);
322 if (ret < 0)
323 return ret;
324
325 _debug("unmarshall FID array");
326 call->request = kcalloc(call->count,
327 sizeof(struct afs_callback_break),
328 GFP_KERNEL);
329 if (!call->request)
330 return -ENOMEM;
331
332 cb = call->request;
333 bp = call->buffer;
334 for (loop = call->count; loop > 0; loop--, cb++) {
335 cb->fid.vid = ntohl(*bp++);
336 cb->fid.vnode = ntohl(*bp++);
337 cb->fid.unique = ntohl(*bp++);
338 }
339
340 afs_extract_to_tmp(call);
341 call->unmarshall++;
342
343
344
345 case 3:
346 _debug("extract CB count");
347 ret = afs_extract_data(call, true);
348 if (ret < 0)
349 return ret;
350
351 call->count2 = ntohl(call->tmp);
352 _debug("CB count: %u", call->count2);
353 if (call->count2 != call->count && call->count2 != 0)
354 return afs_protocol_error(call, -EBADMSG,
355 afs_eproto_cb_count);
356 call->_iter = &call->iter;
357 iov_iter_discard(&call->iter, READ, call->count2 * 3 * 4);
358 call->unmarshall++;
359
360
361 case 4:
362 _debug("extract discard %zu/%u",
363 iov_iter_count(&call->iter), call->count2 * 3 * 4);
364
365 ret = afs_extract_data(call, false);
366 if (ret < 0)
367 return ret;
368
369 call->unmarshall++;
370 case 5:
371 break;
372 }
373
374 if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
375 return afs_io_error(call, afs_io_error_cm_reply);
376
377
378
379 return afs_find_cm_server_by_peer(call);
380 }
381
382
383
384
385 static void SRXAFSCB_InitCallBackState(struct work_struct *work)
386 {
387 struct afs_call *call = container_of(work, struct afs_call, work);
388
389 _enter("{%p}", call->server);
390
391 if (call->server)
392 afs_init_callback_state(call->server);
393 afs_send_empty_reply(call);
394 afs_put_call(call);
395 _leave("");
396 }
397
398
399
400
401 static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
402 {
403 int ret;
404
405 _enter("");
406
407 afs_extract_discard(call, 0);
408 ret = afs_extract_data(call, false);
409 if (ret < 0)
410 return ret;
411
412
413
414 return afs_find_cm_server_by_peer(call);
415 }
416
417
418
419
420 static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
421 {
422 struct afs_uuid *r;
423 unsigned loop;
424 __be32 *b;
425 int ret;
426
427 _enter("");
428
429 _enter("{%u}", call->unmarshall);
430
431 switch (call->unmarshall) {
432 case 0:
433 call->buffer = kmalloc_array(11, sizeof(__be32), GFP_KERNEL);
434 if (!call->buffer)
435 return -ENOMEM;
436 afs_extract_to_buf(call, 11 * sizeof(__be32));
437 call->unmarshall++;
438
439
440 case 1:
441 _debug("extract UUID");
442 ret = afs_extract_data(call, false);
443 switch (ret) {
444 case 0: break;
445 case -EAGAIN: return 0;
446 default: return ret;
447 }
448
449 _debug("unmarshall UUID");
450 call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL);
451 if (!call->request)
452 return -ENOMEM;
453
454 b = call->buffer;
455 r = call->request;
456 r->time_low = b[0];
457 r->time_mid = htons(ntohl(b[1]));
458 r->time_hi_and_version = htons(ntohl(b[2]));
459 r->clock_seq_hi_and_reserved = ntohl(b[3]);
460 r->clock_seq_low = ntohl(b[4]);
461
462 for (loop = 0; loop < 6; loop++)
463 r->node[loop] = ntohl(b[loop + 5]);
464
465 call->unmarshall++;
466
467 case 2:
468 break;
469 }
470
471 if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
472 return afs_io_error(call, afs_io_error_cm_reply);
473
474
475
476 return afs_find_cm_server_by_uuid(call, call->request);
477 }
478
479
480
481
482 static void SRXAFSCB_Probe(struct work_struct *work)
483 {
484 struct afs_call *call = container_of(work, struct afs_call, work);
485
486 _enter("");
487 afs_send_empty_reply(call);
488 afs_put_call(call);
489 _leave("");
490 }
491
492
493
494
495 static int afs_deliver_cb_probe(struct afs_call *call)
496 {
497 int ret;
498
499 _enter("");
500
501 afs_extract_discard(call, 0);
502 ret = afs_extract_data(call, false);
503 if (ret < 0)
504 return ret;
505
506 if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
507 return afs_io_error(call, afs_io_error_cm_reply);
508 return afs_find_cm_server_by_peer(call);
509 }
510
511
512
513
514 static void SRXAFSCB_ProbeUuid(struct work_struct *work)
515 {
516 struct afs_call *call = container_of(work, struct afs_call, work);
517 struct afs_uuid *r = call->request;
518
519 _enter("");
520
521 if (memcmp(r, &call->net->uuid, sizeof(call->net->uuid)) == 0)
522 afs_send_empty_reply(call);
523 else
524 afs_abort_service_call(call, 1, 1, "K-1");
525
526 afs_put_call(call);
527 _leave("");
528 }
529
530
531
532
533 static int afs_deliver_cb_probe_uuid(struct afs_call *call)
534 {
535 struct afs_uuid *r;
536 unsigned loop;
537 __be32 *b;
538 int ret;
539
540 _enter("{%u}", call->unmarshall);
541
542 switch (call->unmarshall) {
543 case 0:
544 call->buffer = kmalloc_array(11, sizeof(__be32), GFP_KERNEL);
545 if (!call->buffer)
546 return -ENOMEM;
547 afs_extract_to_buf(call, 11 * sizeof(__be32));
548 call->unmarshall++;
549
550
551 case 1:
552 _debug("extract UUID");
553 ret = afs_extract_data(call, false);
554 switch (ret) {
555 case 0: break;
556 case -EAGAIN: return 0;
557 default: return ret;
558 }
559
560 _debug("unmarshall UUID");
561 call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL);
562 if (!call->request)
563 return -ENOMEM;
564
565 b = call->buffer;
566 r = call->request;
567 r->time_low = b[0];
568 r->time_mid = htons(ntohl(b[1]));
569 r->time_hi_and_version = htons(ntohl(b[2]));
570 r->clock_seq_hi_and_reserved = ntohl(b[3]);
571 r->clock_seq_low = ntohl(b[4]);
572
573 for (loop = 0; loop < 6; loop++)
574 r->node[loop] = ntohl(b[loop + 5]);
575
576 call->unmarshall++;
577
578 case 2:
579 break;
580 }
581
582 if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
583 return afs_io_error(call, afs_io_error_cm_reply);
584 return afs_find_cm_server_by_uuid(call, call->request);
585 }
586
587
588
589
590 static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
591 {
592 struct afs_call *call = container_of(work, struct afs_call, work);
593 int loop;
594
595 struct {
596 struct {
597 __be32 nifs;
598 __be32 uuid[11];
599 __be32 ifaddr[32];
600 __be32 netmask[32];
601 __be32 mtu[32];
602 } ia;
603 struct {
604 __be32 capcount;
605 __be32 caps[1];
606 } cap;
607 } reply;
608
609 _enter("");
610
611 memset(&reply, 0, sizeof(reply));
612
613 reply.ia.uuid[0] = call->net->uuid.time_low;
614 reply.ia.uuid[1] = htonl(ntohs(call->net->uuid.time_mid));
615 reply.ia.uuid[2] = htonl(ntohs(call->net->uuid.time_hi_and_version));
616 reply.ia.uuid[3] = htonl((s8) call->net->uuid.clock_seq_hi_and_reserved);
617 reply.ia.uuid[4] = htonl((s8) call->net->uuid.clock_seq_low);
618 for (loop = 0; loop < 6; loop++)
619 reply.ia.uuid[loop + 5] = htonl((s8) call->net->uuid.node[loop]);
620
621 reply.cap.capcount = htonl(1);
622 reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
623 afs_send_simple_reply(call, &reply, sizeof(reply));
624 afs_put_call(call);
625 _leave("");
626 }
627
628
629
630
631 static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *call)
632 {
633 int ret;
634
635 _enter("");
636
637 afs_extract_discard(call, 0);
638 ret = afs_extract_data(call, false);
639 if (ret < 0)
640 return ret;
641
642 if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
643 return afs_io_error(call, afs_io_error_cm_reply);
644 return afs_find_cm_server_by_peer(call);
645 }
646
647
648
649
650 static int afs_deliver_yfs_cb_callback(struct afs_call *call)
651 {
652 struct afs_callback_break *cb;
653 struct yfs_xdr_YFSFid *bp;
654 size_t size;
655 int ret, loop;
656
657 _enter("{%u}", call->unmarshall);
658
659 switch (call->unmarshall) {
660 case 0:
661 afs_extract_to_tmp(call);
662 call->unmarshall++;
663
664
665
666 case 1:
667 _debug("extract FID count");
668 ret = afs_extract_data(call, true);
669 if (ret < 0)
670 return ret;
671
672 call->count = ntohl(call->tmp);
673 _debug("FID count: %u", call->count);
674 if (call->count > YFSCBMAX)
675 return afs_protocol_error(call, -EBADMSG,
676 afs_eproto_cb_fid_count);
677
678 size = array_size(call->count, sizeof(struct yfs_xdr_YFSFid));
679 call->buffer = kmalloc(size, GFP_KERNEL);
680 if (!call->buffer)
681 return -ENOMEM;
682 afs_extract_to_buf(call, size);
683 call->unmarshall++;
684
685
686 case 2:
687 _debug("extract FID array");
688 ret = afs_extract_data(call, false);
689 if (ret < 0)
690 return ret;
691
692 _debug("unmarshall FID array");
693 call->request = kcalloc(call->count,
694 sizeof(struct afs_callback_break),
695 GFP_KERNEL);
696 if (!call->request)
697 return -ENOMEM;
698
699 cb = call->request;
700 bp = call->buffer;
701 for (loop = call->count; loop > 0; loop--, cb++) {
702 cb->fid.vid = xdr_to_u64(bp->volume);
703 cb->fid.vnode = xdr_to_u64(bp->vnode.lo);
704 cb->fid.vnode_hi = ntohl(bp->vnode.hi);
705 cb->fid.unique = ntohl(bp->vnode.unique);
706 bp++;
707 }
708
709 afs_extract_to_tmp(call);
710 call->unmarshall++;
711
712 case 3:
713 break;
714 }
715
716 if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
717 return afs_io_error(call, afs_io_error_cm_reply);
718
719
720
721
722 return afs_find_cm_server_by_peer(call);
723 }