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12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/slab.h>
15#include <linux/sched.h>
16#include <linux/ip.h>
17#include "internal.h"
18#include "afs_cm.h"
19
20#if 0
21struct workqueue_struct *afs_cm_workqueue;
22#endif
23
24static int afs_deliver_cb_init_call_back_state(struct afs_call *,
25 struct sk_buff *, bool);
26static int afs_deliver_cb_init_call_back_state3(struct afs_call *,
27 struct sk_buff *, bool);
28static int afs_deliver_cb_probe(struct afs_call *, struct sk_buff *, bool);
29static int afs_deliver_cb_callback(struct afs_call *, struct sk_buff *, bool);
30static int afs_deliver_cb_probe_uuid(struct afs_call *, struct sk_buff *, bool);
31static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *,
32 struct sk_buff *, bool);
33static void afs_cm_destructor(struct afs_call *);
34
35
36
37
38static const struct afs_call_type afs_SRXCBCallBack = {
39 .name = "CB.CallBack",
40 .deliver = afs_deliver_cb_callback,
41 .abort_to_error = afs_abort_to_error,
42 .destructor = afs_cm_destructor,
43};
44
45
46
47
48static const struct afs_call_type afs_SRXCBInitCallBackState = {
49 .name = "CB.InitCallBackState",
50 .deliver = afs_deliver_cb_init_call_back_state,
51 .abort_to_error = afs_abort_to_error,
52 .destructor = afs_cm_destructor,
53};
54
55
56
57
58static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
59 .name = "CB.InitCallBackState3",
60 .deliver = afs_deliver_cb_init_call_back_state3,
61 .abort_to_error = afs_abort_to_error,
62 .destructor = afs_cm_destructor,
63};
64
65
66
67
68static const struct afs_call_type afs_SRXCBProbe = {
69 .name = "CB.Probe",
70 .deliver = afs_deliver_cb_probe,
71 .abort_to_error = afs_abort_to_error,
72 .destructor = afs_cm_destructor,
73};
74
75
76
77
78static const struct afs_call_type afs_SRXCBProbeUuid = {
79 .name = "CB.ProbeUuid",
80 .deliver = afs_deliver_cb_probe_uuid,
81 .abort_to_error = afs_abort_to_error,
82 .destructor = afs_cm_destructor,
83};
84
85
86
87
88static const struct afs_call_type afs_SRXCBTellMeAboutYourself = {
89 .name = "CB.TellMeAboutYourself",
90 .deliver = afs_deliver_cb_tell_me_about_yourself,
91 .abort_to_error = afs_abort_to_error,
92 .destructor = afs_cm_destructor,
93};
94
95
96
97
98
99bool afs_cm_incoming_call(struct afs_call *call)
100{
101 u32 operation_id = ntohl(call->operation_ID);
102
103 _enter("{CB.OP %u}", operation_id);
104
105 switch (operation_id) {
106 case CBCallBack:
107 call->type = &afs_SRXCBCallBack;
108 return true;
109 case CBInitCallBackState:
110 call->type = &afs_SRXCBInitCallBackState;
111 return true;
112 case CBInitCallBackState3:
113 call->type = &afs_SRXCBInitCallBackState3;
114 return true;
115 case CBProbe:
116 call->type = &afs_SRXCBProbe;
117 return true;
118 case CBTellMeAboutYourself:
119 call->type = &afs_SRXCBTellMeAboutYourself;
120 return true;
121 default:
122 return false;
123 }
124}
125
126
127
128
129static void afs_cm_destructor(struct afs_call *call)
130{
131 _enter("");
132
133 afs_put_server(call->server);
134 call->server = NULL;
135 kfree(call->buffer);
136 call->buffer = NULL;
137}
138
139
140
141
142static void SRXAFSCB_CallBack(struct work_struct *work)
143{
144 struct afs_call *call = container_of(work, struct afs_call, work);
145
146 _enter("");
147
148
149
150
151
152
153 afs_send_empty_reply(call);
154
155 afs_break_callbacks(call->server, call->count, call->request);
156 _leave("");
157}
158
159
160
161
162static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
163 bool last)
164{
165 struct afs_callback *cb;
166 struct afs_server *server;
167 struct in_addr addr;
168 __be32 *bp;
169 u32 tmp;
170 int ret, loop;
171
172 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
173
174 switch (call->unmarshall) {
175 case 0:
176 call->offset = 0;
177 call->unmarshall++;
178
179
180 case 1:
181 _debug("extract FID count");
182 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
183 switch (ret) {
184 case 0: break;
185 case -EAGAIN: return 0;
186 default: return ret;
187 }
188
189 call->count = ntohl(call->tmp);
190 _debug("FID count: %u", call->count);
191 if (call->count > AFSCBMAX)
192 return -EBADMSG;
193
194 call->buffer = kmalloc(call->count * 3 * 4, GFP_KERNEL);
195 if (!call->buffer)
196 return -ENOMEM;
197 call->offset = 0;
198 call->unmarshall++;
199
200 case 2:
201 _debug("extract FID array");
202 ret = afs_extract_data(call, skb, last, call->buffer,
203 call->count * 3 * 4);
204 switch (ret) {
205 case 0: break;
206 case -EAGAIN: return 0;
207 default: return ret;
208 }
209
210 _debug("unmarshall FID array");
211 call->request = kcalloc(call->count,
212 sizeof(struct afs_callback),
213 GFP_KERNEL);
214 if (!call->request)
215 return -ENOMEM;
216
217 cb = call->request;
218 bp = call->buffer;
219 for (loop = call->count; loop > 0; loop--, cb++) {
220 cb->fid.vid = ntohl(*bp++);
221 cb->fid.vnode = ntohl(*bp++);
222 cb->fid.unique = ntohl(*bp++);
223 cb->type = AFSCM_CB_UNTYPED;
224 }
225
226 call->offset = 0;
227 call->unmarshall++;
228
229
230 case 3:
231 _debug("extract CB count");
232 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
233 switch (ret) {
234 case 0: break;
235 case -EAGAIN: return 0;
236 default: return ret;
237 }
238
239 tmp = ntohl(call->tmp);
240 _debug("CB count: %u", tmp);
241 if (tmp != call->count && tmp != 0)
242 return -EBADMSG;
243 call->offset = 0;
244 call->unmarshall++;
245 if (tmp == 0)
246 goto empty_cb_array;
247
248 case 4:
249 _debug("extract CB array");
250 ret = afs_extract_data(call, skb, last, call->request,
251 call->count * 3 * 4);
252 switch (ret) {
253 case 0: break;
254 case -EAGAIN: return 0;
255 default: return ret;
256 }
257
258 _debug("unmarshall CB array");
259 cb = call->request;
260 bp = call->buffer;
261 for (loop = call->count; loop > 0; loop--, cb++) {
262 cb->version = ntohl(*bp++);
263 cb->expiry = ntohl(*bp++);
264 cb->type = ntohl(*bp++);
265 }
266
267 empty_cb_array:
268 call->offset = 0;
269 call->unmarshall++;
270
271 case 5:
272 _debug("trailer");
273 if (skb->len != 0)
274 return -EBADMSG;
275 break;
276 }
277
278 if (!last)
279 return 0;
280
281 call->state = AFS_CALL_REPLYING;
282
283
284
285 memcpy(&addr, &ip_hdr(skb)->saddr, 4);
286 server = afs_find_server(&addr);
287 if (!server)
288 return -ENOTCONN;
289 call->server = server;
290
291 INIT_WORK(&call->work, SRXAFSCB_CallBack);
292 queue_work(afs_wq, &call->work);
293 return 0;
294}
295
296
297
298
299static void SRXAFSCB_InitCallBackState(struct work_struct *work)
300{
301 struct afs_call *call = container_of(work, struct afs_call, work);
302
303 _enter("{%p}", call->server);
304
305 afs_init_callback_state(call->server);
306 afs_send_empty_reply(call);
307 _leave("");
308}
309
310
311
312
313static int afs_deliver_cb_init_call_back_state(struct afs_call *call,
314 struct sk_buff *skb,
315 bool last)
316{
317 struct afs_server *server;
318 struct in_addr addr;
319
320 _enter(",{%u},%d", skb->len, last);
321
322 if (skb->len > 0)
323 return -EBADMSG;
324 if (!last)
325 return 0;
326
327
328 call->state = AFS_CALL_REPLYING;
329
330
331
332 memcpy(&addr, &ip_hdr(skb)->saddr, 4);
333 server = afs_find_server(&addr);
334 if (!server)
335 return -ENOTCONN;
336 call->server = server;
337
338 INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
339 queue_work(afs_wq, &call->work);
340 return 0;
341}
342
343
344
345
346static int afs_deliver_cb_init_call_back_state3(struct afs_call *call,
347 struct sk_buff *skb,
348 bool last)
349{
350 struct afs_server *server;
351 struct in_addr addr;
352
353 _enter(",{%u},%d", skb->len, last);
354
355 if (!last)
356 return 0;
357
358
359 call->state = AFS_CALL_REPLYING;
360
361
362
363 memcpy(&addr, &ip_hdr(skb)->saddr, 4);
364 server = afs_find_server(&addr);
365 if (!server)
366 return -ENOTCONN;
367 call->server = server;
368
369 INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
370 queue_work(afs_wq, &call->work);
371 return 0;
372}
373
374
375
376
377static void SRXAFSCB_Probe(struct work_struct *work)
378{
379 struct afs_call *call = container_of(work, struct afs_call, work);
380
381 _enter("");
382 afs_send_empty_reply(call);
383 _leave("");
384}
385
386
387
388
389static int afs_deliver_cb_probe(struct afs_call *call, struct sk_buff *skb,
390 bool last)
391{
392 _enter(",{%u},%d", skb->len, last);
393
394 if (skb->len > 0)
395 return -EBADMSG;
396 if (!last)
397 return 0;
398
399
400 call->state = AFS_CALL_REPLYING;
401
402 INIT_WORK(&call->work, SRXAFSCB_Probe);
403 queue_work(afs_wq, &call->work);
404 return 0;
405}
406
407
408
409
410static void SRXAFSCB_ProbeUuid(struct work_struct *work)
411{
412 struct afs_call *call = container_of(work, struct afs_call, work);
413 struct afs_uuid *r = call->request;
414
415 struct {
416 __be32 match;
417 } reply;
418
419 _enter("");
420
421
422 if (memcmp(r, &afs_uuid, sizeof(afs_uuid)) == 0)
423 reply.match = htonl(0);
424 else
425 reply.match = htonl(1);
426
427 afs_send_simple_reply(call, &reply, sizeof(reply));
428 _leave("");
429}
430
431
432
433
434static int afs_deliver_cb_probe_uuid(struct afs_call *call, struct sk_buff *skb,
435 bool last)
436{
437 struct afs_uuid *r;
438 unsigned loop;
439 __be32 *b;
440 int ret;
441
442 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
443
444 if (skb->len > 0)
445 return -EBADMSG;
446 if (!last)
447 return 0;
448
449 switch (call->unmarshall) {
450 case 0:
451 call->offset = 0;
452 call->buffer = kmalloc(11 * sizeof(__be32), GFP_KERNEL);
453 if (!call->buffer)
454 return -ENOMEM;
455 call->unmarshall++;
456
457 case 1:
458 _debug("extract UUID");
459 ret = afs_extract_data(call, skb, last, call->buffer,
460 11 * sizeof(__be32));
461 switch (ret) {
462 case 0: break;
463 case -EAGAIN: return 0;
464 default: return ret;
465 }
466
467 _debug("unmarshall UUID");
468 call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL);
469 if (!call->request)
470 return -ENOMEM;
471
472 b = call->buffer;
473 r = call->request;
474 r->time_low = ntohl(b[0]);
475 r->time_mid = ntohl(b[1]);
476 r->time_hi_and_version = ntohl(b[2]);
477 r->clock_seq_hi_and_reserved = ntohl(b[3]);
478 r->clock_seq_low = ntohl(b[4]);
479
480 for (loop = 0; loop < 6; loop++)
481 r->node[loop] = ntohl(b[loop + 5]);
482
483 call->offset = 0;
484 call->unmarshall++;
485
486 case 2:
487 _debug("trailer");
488 if (skb->len != 0)
489 return -EBADMSG;
490 break;
491 }
492
493 if (!last)
494 return 0;
495
496 call->state = AFS_CALL_REPLYING;
497
498 INIT_WORK(&call->work, SRXAFSCB_ProbeUuid);
499 queue_work(afs_wq, &call->work);
500 return 0;
501}
502
503
504
505
506static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
507{
508 struct afs_interface *ifs;
509 struct afs_call *call = container_of(work, struct afs_call, work);
510 int loop, nifs;
511
512 struct {
513 struct {
514 __be32 nifs;
515 __be32 uuid[11];
516 __be32 ifaddr[32];
517 __be32 netmask[32];
518 __be32 mtu[32];
519 } ia;
520 struct {
521 __be32 capcount;
522 __be32 caps[1];
523 } cap;
524 } reply;
525
526 _enter("");
527
528 nifs = 0;
529 ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
530 if (ifs) {
531 nifs = afs_get_ipv4_interfaces(ifs, 32, false);
532 if (nifs < 0) {
533 kfree(ifs);
534 ifs = NULL;
535 nifs = 0;
536 }
537 }
538
539 memset(&reply, 0, sizeof(reply));
540 reply.ia.nifs = htonl(nifs);
541
542 reply.ia.uuid[0] = htonl(afs_uuid.time_low);
543 reply.ia.uuid[1] = htonl(afs_uuid.time_mid);
544 reply.ia.uuid[2] = htonl(afs_uuid.time_hi_and_version);
545 reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved);
546 reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low);
547 for (loop = 0; loop < 6; loop++)
548 reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]);
549
550 if (ifs) {
551 for (loop = 0; loop < nifs; loop++) {
552 reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
553 reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
554 reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
555 }
556 kfree(ifs);
557 }
558
559 reply.cap.capcount = htonl(1);
560 reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
561 afs_send_simple_reply(call, &reply, sizeof(reply));
562
563 _leave("");
564}
565
566
567
568
569static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *call,
570 struct sk_buff *skb, bool last)
571{
572 _enter(",{%u},%d", skb->len, last);
573
574 if (skb->len > 0)
575 return -EBADMSG;
576 if (!last)
577 return 0;
578
579
580 call->state = AFS_CALL_REPLYING;
581
582 INIT_WORK(&call->work, SRXAFSCB_TellMeAboutYourself);
583 queue_work(afs_wq, &call->work);
584 return 0;
585}
586
