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docs: update winbind refresh tickets example to be consistent with default
[Samba.git] / ctdb / ib / ibwrapper.c
blobf6e71687f324856d16868e61ce8e9f458d512822
1 /*
2 * Unix SMB/CIFS implementation.
3 * Wrap Infiniband calls.
4 *
5 * Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
6 *
7 * Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include <stdlib.h>
24 #include <string.h>
25 #include <stdio.h>
26 #include <errno.h>
27 #include <sys/types.h>
28 #include <netinet/in.h>
29 #include <sys/socket.h>
30 #include <netdb.h>
31 #include <arpa/inet.h>
32 #include <malloc.h>
33 #include <assert.h>
34 #include <unistd.h>
35
36 #include "includes.h"
37 #include "lib/events/events.h"
38 #include "ibwrapper.h"
39
40 #include <infiniband/kern-abi.h>
41 #include <rdma/rdma_cma_abi.h>
42 #include <rdma/rdma_cma.h>
43
44 #include "ibwrapper_internal.h"
45 #include "lib/util/dlinklist.h"
46
47 #define IBW_LASTERR_BUFSIZE 512
48 static char ibw_lasterr[IBW_LASTERR_BUFSIZE];
49
50 #define IBW_MAX_SEND_WR 256
51 #define IBW_MAX_RECV_WR 1024
52 #define IBW_RECV_BUFSIZE 256
53 #define IBW_RECV_THRESHOLD (1 * 1024 * 1024)
54
55 static void ibw_event_handler_verbs(struct event_context *ev,
56 struct fd_event *fde, uint16_t flags, void *private_data);
57 static int ibw_fill_cq(struct ibw_conn *conn);
58 static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc);
59 static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc);
60 static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len);
61
62 static void *ibw_alloc_mr(struct ibw_ctx_priv *pctx, struct ibw_conn_priv *pconn,
63 uint32_t n, struct ibv_mr **ppmr)
64 {
65 void *buf;
66
67 DEBUG(DEBUG_DEBUG, ("ibw_alloc_mr(cmid=%p, n=%u)\n", pconn->cm_id, n));
68 buf = memalign(pctx->pagesize, n);
69 if (!buf) {
70 sprintf(ibw_lasterr, "couldn't allocate memory\n");
71 return NULL;
72 }
73
74 *ppmr = ibv_reg_mr(pconn->pd, buf, n, IBV_ACCESS_LOCAL_WRITE);
75 if (!*ppmr) {
76 sprintf(ibw_lasterr, "couldn't allocate mr\n");
77 free(buf);
78 return NULL;
79 }
80
81 return buf;
82 }
83
84 static void ibw_free_mr(char **ppbuf, struct ibv_mr **ppmr)
85 {
86 DEBUG(DEBUG_DEBUG, ("ibw_free_mr(%p %p)\n", *ppbuf, *ppmr));
87 if (*ppmr!=NULL) {
88 ibv_dereg_mr(*ppmr);
89 *ppmr = NULL;
90 }
91 if (*ppbuf) {
92 free(*ppbuf);
93 *ppbuf = NULL;
94 }
95 }
96
97 static int ibw_init_memory(struct ibw_conn *conn)
98 {
99 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
100 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
101 struct ibw_opts *opts = &pctx->opts;
102 int i;
103 struct ibw_wr *p;
104
105 DEBUG(DEBUG_DEBUG, ("ibw_init_memory(cmid: %p)\n", pconn->cm_id));
106 pconn->buf_send = ibw_alloc_mr(pctx, pconn,
107 opts->max_send_wr * opts->recv_bufsize, &pconn->mr_send);
108 if (!pconn->buf_send) {
109 sprintf(ibw_lasterr, "couldn't allocate work send buf\n");
110 return -1;
111 }
112
113 pconn->buf_recv = ibw_alloc_mr(pctx, pconn,
114 opts->max_recv_wr * opts->recv_bufsize, &pconn->mr_recv);
115 if (!pconn->buf_recv) {
116 sprintf(ibw_lasterr, "couldn't allocate work recv buf\n");
117 return -1;
118 }
119
120 pconn->wr_index = talloc_size(pconn, opts->max_send_wr * sizeof(struct ibw_wr *));
121 assert(pconn->wr_index!=NULL);
122
123 for(i=0; i<opts->max_send_wr; i++) {
124 p = pconn->wr_index[i] = talloc_zero(pconn, struct ibw_wr);
125 p->buf = pconn->buf_send + (i * opts->recv_bufsize);
126 p->wr_id = i;
127
128 DLIST_ADD(pconn->wr_list_avail, p);
129 }
130
131 return 0;
132 }
133
134 static int ibw_ctx_priv_destruct(struct ibw_ctx_priv *pctx)
135 {
136 DEBUG(DEBUG_DEBUG, ("ibw_ctx_priv_destruct(%p)\n", pctx));
137
138 /* destroy cm */
139 if (pctx->cm_channel) {
140 rdma_destroy_event_channel(pctx->cm_channel);
141 pctx->cm_channel = NULL;
142 }
143 if (pctx->cm_channel_event) {
144 /* TODO: do we have to do this here? */
145 talloc_free(pctx->cm_channel_event);
146 pctx->cm_channel_event = NULL;
147 }
148 if (pctx->cm_id) {
149 rdma_destroy_id(pctx->cm_id);
150 pctx->cm_id = NULL;
151 }
152
153 return 0;
154 }
155
156 static int ibw_ctx_destruct(struct ibw_ctx *ctx)
157 {
158 DEBUG(DEBUG_DEBUG, ("ibw_ctx_destruct(%p)\n", ctx));
159 return 0;
160 }
161
162 static int ibw_conn_priv_destruct(struct ibw_conn_priv *pconn)
163 {
164 DEBUG(DEBUG_DEBUG, ("ibw_conn_priv_destruct(%p, cmid: %p)\n",
165 pconn, pconn->cm_id));
166
167 /* pconn->wr_index is freed by talloc */
168 /* pconn->wr_index[i] are freed by talloc */
169
170 /* destroy verbs */
171 if (pconn->cm_id!=NULL && pconn->cm_id->qp!=NULL) {
172 rdma_destroy_qp(pconn->cm_id);
173 pconn->cm_id->qp = NULL;
174 }
175
176 if (pconn->cq!=NULL) {
177 ibv_destroy_cq(pconn->cq);
178 pconn->cq = NULL;
179 }
180
181 if (pconn->verbs_channel!=NULL) {
182 ibv_destroy_comp_channel(pconn->verbs_channel);
183 pconn->verbs_channel = NULL;
184 }
185
186 /* must be freed here because its order is important */
187 if (pconn->verbs_channel_event) {
188 talloc_free(pconn->verbs_channel_event);
189 pconn->verbs_channel_event = NULL;
190 }
191
192 /* free memory regions */
193 ibw_free_mr(&pconn->buf_send, &pconn->mr_send);
194 ibw_free_mr(&pconn->buf_recv, &pconn->mr_recv);
195
196 if (pconn->pd) {
197 ibv_dealloc_pd(pconn->pd);
198 pconn->pd = NULL;
199 DEBUG(DEBUG_DEBUG, ("pconn=%p pd deallocated\n", pconn));
200 }
201
202 if (pconn->cm_id) {
203 rdma_destroy_id(pconn->cm_id);
204 pconn->cm_id = NULL;
205 DEBUG(DEBUG_DEBUG, ("pconn=%p cm_id destroyed\n", pconn));
206 }
207
208 return 0;
209 }
210
211 static int ibw_wr_destruct(struct ibw_wr *wr)
212 {
213 if (wr->buf_large!=NULL)
214 ibw_free_mr(&wr->buf_large, &wr->mr_large);
215 return 0;
216 }
217
218 static int ibw_conn_destruct(struct ibw_conn *conn)
219 {
220 DEBUG(DEBUG_DEBUG, ("ibw_conn_destruct(%p)\n", conn));
221
222 /* important here: ctx is a talloc _parent_ */
223 DLIST_REMOVE(conn->ctx->conn_list, conn);
224 return 0;
225 }
226
227 struct ibw_conn *ibw_conn_new(struct ibw_ctx *ctx, TALLOC_CTX *mem_ctx)
228 {
229 struct ibw_conn *conn;
230 struct ibw_conn_priv *pconn;
231
232 assert(ctx!=NULL);
233
234 conn = talloc_zero(mem_ctx, struct ibw_conn);
235 assert(conn!=NULL);
236 talloc_set_destructor(conn, ibw_conn_destruct);
237
238 pconn = talloc_zero(conn, struct ibw_conn_priv);
239 assert(pconn!=NULL);
240 talloc_set_destructor(pconn, ibw_conn_priv_destruct);
241
242 conn->ctx = ctx;
243 conn->internal = (void *)pconn;
244
245 DLIST_ADD(ctx->conn_list, conn);
246
247 return conn;
248 }
249
250 static int ibw_setup_cq_qp(struct ibw_conn *conn)
251 {
252 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
253 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
254 struct ibv_qp_init_attr init_attr;
255 struct ibv_qp_attr attr;
256 int rc;
257
258 DEBUG(DEBUG_DEBUG, ("ibw_setup_cq_qp(cmid: %p)\n", pconn->cm_id));
259
260 /* init verbs */
261 pconn->verbs_channel = ibv_create_comp_channel(pconn->cm_id->verbs);
262 if (!pconn->verbs_channel) {
263 sprintf(ibw_lasterr, "ibv_create_comp_channel failed %d\n", errno);
264 return -1;
265 }
266 DEBUG(DEBUG_DEBUG, ("created channel %p\n", pconn->verbs_channel));
267
268 pconn->verbs_channel_event = event_add_fd(pctx->ectx, NULL, /* not pconn or conn */
269 pconn->verbs_channel->fd, EVENT_FD_READ, ibw_event_handler_verbs, conn);
270
271 pconn->pd = ibv_alloc_pd(pconn->cm_id->verbs);
272 if (!pconn->pd) {
273 sprintf(ibw_lasterr, "ibv_alloc_pd failed %d\n", errno);
274 return -1;
275 }
276 DEBUG(DEBUG_DEBUG, ("created pd %p\n", pconn->pd));
277
278 /* init mr */
279 if (ibw_init_memory(conn))
280 return -1;
281
282 /* init cq */
283 pconn->cq = ibv_create_cq(pconn->cm_id->verbs,
284 pctx->opts.max_recv_wr + pctx->opts.max_send_wr,
285 conn, pconn->verbs_channel, 0);
286 if (pconn->cq==NULL) {
287 sprintf(ibw_lasterr, "ibv_create_cq failed\n");
288 return -1;
289 }
290
291 rc = ibv_req_notify_cq(pconn->cq, 0);
292 if (rc) {
293 sprintf(ibw_lasterr, "ibv_req_notify_cq failed with %d\n", rc);
294 return rc;
295 }
296
297 /* init qp */
298 memset(&init_attr, 0, sizeof(init_attr));
299 init_attr.cap.max_send_wr = pctx->opts.max_send_wr;
300 init_attr.cap.max_recv_wr = pctx->opts.max_recv_wr;
301 init_attr.cap.max_recv_sge = 1;
302 init_attr.cap.max_send_sge = 1;
303 init_attr.qp_type = IBV_QPT_RC;
304 init_attr.send_cq = pconn->cq;
305 init_attr.recv_cq = pconn->cq;
306
307 rc = rdma_create_qp(pconn->cm_id, pconn->pd, &init_attr);
308 if (rc) {
309 sprintf(ibw_lasterr, "rdma_create_qp failed with %d\n", rc);
310 return rc;
311 }
312 /* elase result is in pconn->cm_id->qp */
313
314 rc = ibv_query_qp(pconn->cm_id->qp, &attr, IBV_QP_PATH_MTU, &init_attr);
315 if (rc) {
316 sprintf(ibw_lasterr, "ibv_query_qp failed with %d\n", rc);
317 return rc;
318 }
319
320 return ibw_fill_cq(conn);
321 }
322
323 static int ibw_refill_cq_recv(struct ibw_conn *conn)
324 {
325 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
326 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
327 int rc;
328 struct ibv_sge list = {
329 .addr = (uintptr_t) NULL, /* filled below */
330 .length = pctx->opts.recv_bufsize,
331 .lkey = pconn->mr_recv->lkey /* always the same */
332 };
333 struct ibv_recv_wr wr = {
334 .wr_id = 0, /* filled below */
335 .sg_list = &list,
336 .num_sge = 1,
337 };
338 struct ibv_recv_wr *bad_wr;
339
340 DEBUG(DEBUG_DEBUG, ("ibw_refill_cq_recv(cmid: %p)\n", pconn->cm_id));
341
342 list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index;
343 wr.wr_id = pconn->recv_index;
344 pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr;
345
346 rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr);
347 if (rc) {
348 sprintf(ibw_lasterr, "refill/ibv_post_recv failed with %d\n", rc);
349 DEBUG(DEBUG_ERR, (ibw_lasterr));
350 return -2;
351 }
352
353 return 0;
354 }
355
356 static int ibw_fill_cq(struct ibw_conn *conn)
357 {
358 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
359 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
360 int i, rc;
361 struct ibv_sge list = {
362 .addr = (uintptr_t) NULL, /* filled below */
363 .length = pctx->opts.recv_bufsize,
364 .lkey = pconn->mr_recv->lkey /* always the same */
365 };
366 struct ibv_recv_wr wr = {
367 .wr_id = 0, /* filled below */
368 .sg_list = &list,
369 .num_sge = 1,
370 };
371 struct ibv_recv_wr *bad_wr;
372
373 DEBUG(DEBUG_DEBUG, ("ibw_fill_cq(cmid: %p)\n", pconn->cm_id));
374
375 for(i = pctx->opts.max_recv_wr; i!=0; i--) {
376 list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index;
377 wr.wr_id = pconn->recv_index;
378 pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr;
379
380 rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr);
381 if (rc) {
382 sprintf(ibw_lasterr, "fill/ibv_post_recv failed with %d\n", rc);
383 DEBUG(DEBUG_ERR, (ibw_lasterr));
384 return -2;
385 }
386 }
387
388 return 0;
389 }
390
391 static int ibw_manage_connect(struct ibw_conn *conn)
392 {
393 struct rdma_conn_param conn_param;
394 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
395 int rc;
396
397 DEBUG(DEBUG_DEBUG, ("ibw_manage_connect(cmid: %p)\n", pconn->cm_id));
398
399 if (ibw_setup_cq_qp(conn))
400 return -1;
401
402 /* cm connect */
403 memset(&conn_param, 0, sizeof conn_param);
404 conn_param.responder_resources = 1;
405 conn_param.initiator_depth = 1;
406 conn_param.retry_count = 10;
407
408 rc = rdma_connect(pconn->cm_id, &conn_param);
409 if (rc)
410 sprintf(ibw_lasterr, "rdma_connect error %d\n", rc);
411
412 return rc;
413 }
414
415 static void ibw_event_handler_cm(struct event_context *ev,
416 struct fd_event *fde, uint16_t flags, void *private_data)
417 {
418 int rc;
419 struct ibw_ctx *ctx = talloc_get_type(private_data, struct ibw_ctx);
420 struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv);
421 struct ibw_conn *conn = NULL;
422 struct ibw_conn_priv *pconn = NULL;
423 struct rdma_cm_id *cma_id = NULL;
424 struct rdma_cm_event *event = NULL;
425
426 assert(ctx!=NULL);
427
428 rc = rdma_get_cm_event(pctx->cm_channel, &event);
429 if (rc) {
430 ctx->state = IBWS_ERROR;
431 event = NULL;
432 sprintf(ibw_lasterr, "rdma_get_cm_event error %d\n", rc);
433 goto error;
434 }
435 cma_id = event->id;
436
437 DEBUG(DEBUG_DEBUG, ("cma_event type %d cma_id %p (%s)\n", event->event, cma_id,
438 (cma_id == pctx->cm_id) ? "parent" : "child"));
439
440 switch (event->event) {
441 case RDMA_CM_EVENT_ADDR_RESOLVED:
442 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_ADDR_RESOLVED\n"));
443 /* continuing from ibw_connect ... */
444 rc = rdma_resolve_route(cma_id, 2000);
445 if (rc) {
446 sprintf(ibw_lasterr, "rdma_resolve_route error %d\n", rc);
447 goto error;
448 }
449 /* continued at RDMA_CM_EVENT_ROUTE_RESOLVED */
450 break;
451
452 case RDMA_CM_EVENT_ROUTE_RESOLVED:
453 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_ROUTE_RESOLVED\n"));
454 /* after RDMA_CM_EVENT_ADDR_RESOLVED: */
455 assert(cma_id->context!=NULL);
456 conn = talloc_get_type(cma_id->context, struct ibw_conn);
457
458 rc = ibw_manage_connect(conn);
459 if (rc)
460 goto error;
461
462 break;
463
464 case RDMA_CM_EVENT_CONNECT_REQUEST:
465 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_CONNECT_REQUEST\n"));
466 ctx->state = IBWS_CONNECT_REQUEST;
467 conn = ibw_conn_new(ctx, ctx);
468 pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
469 pconn->cm_id = cma_id; /* !!! event will be freed but id not */
470 cma_id->context = (void *)conn;
471 DEBUG(DEBUG_DEBUG, ("pconn->cm_id %p\n", pconn->cm_id));
472
473 if (ibw_setup_cq_qp(conn))
474 goto error;
475
476 conn->state = IBWC_INIT;
477 pctx->connstate_func(ctx, conn);
478
479 /* continued at ibw_accept when invoked by the func above */
480 if (!pconn->is_accepted) {
481 rc = rdma_reject(cma_id, NULL, 0);
482 if (rc)
483 DEBUG(DEBUG_ERR, ("rdma_reject failed with rc=%d\n", rc));
484 talloc_free(conn);
485 DEBUG(DEBUG_DEBUG, ("pconn->cm_id %p wasn't accepted\n", pconn->cm_id));
486 }
487
488 /* TODO: clarify whether if it's needed by upper layer: */
489 ctx->state = IBWS_READY;
490 pctx->connstate_func(ctx, NULL);
491
492 /* NOTE: more requests can arrive until RDMA_CM_EVENT_ESTABLISHED ! */
493 break;
494
495 case RDMA_CM_EVENT_ESTABLISHED:
496 /* expected after ibw_accept and ibw_connect[not directly] */
497 DEBUG(DEBUG_INFO, ("ESTABLISHED (conn: %p)\n", cma_id->context));
498 conn = talloc_get_type(cma_id->context, struct ibw_conn);
499 assert(conn!=NULL); /* important assumption */
500
501 DEBUG(DEBUG_DEBUG, ("ibw_setup_cq_qp succeeded (cmid=%p)\n", cma_id));
502
503 /* client conn is up */
504 conn->state = IBWC_CONNECTED;
505
506 /* both ctx and conn have changed */
507 pctx->connstate_func(ctx, conn);
508 break;
509
510 case RDMA_CM_EVENT_ADDR_ERROR:
511 sprintf(ibw_lasterr, "RDMA_CM_EVENT_ADDR_ERROR, error %d\n", event->status);
512 case RDMA_CM_EVENT_ROUTE_ERROR:
513 sprintf(ibw_lasterr, "RDMA_CM_EVENT_ROUTE_ERROR, error %d\n", event->status);
514 case RDMA_CM_EVENT_CONNECT_ERROR:
515 sprintf(ibw_lasterr, "RDMA_CM_EVENT_CONNECT_ERROR, error %d\n", event->status);
516 case RDMA_CM_EVENT_UNREACHABLE:
517 sprintf(ibw_lasterr, "RDMA_CM_EVENT_UNREACHABLE, error %d\n", event->status);
518 goto error;
519 case RDMA_CM_EVENT_REJECTED:
520 sprintf(ibw_lasterr, "RDMA_CM_EVENT_REJECTED, error %d\n", event->status);
521 DEBUG(DEBUG_INFO, ("cm event handler: %s", ibw_lasterr));
522 conn = talloc_get_type(cma_id->context, struct ibw_conn);
523 if (conn) {
524 /* must be done BEFORE connstate */
525 if ((rc=rdma_ack_cm_event(event)))
526 DEBUG(DEBUG_ERR, ("reject/rdma_ack_cm_event failed with %d\n", rc));
527 event = NULL; /* not to touch cma_id or conn */
528 conn->state = IBWC_ERROR;
529 /* it should free the conn */
530 pctx->connstate_func(NULL, conn);
531 }
532 break; /* this is not strictly an error */
533
534 case RDMA_CM_EVENT_DISCONNECTED:
535 DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_DISCONNECTED\n"));
536 if ((rc=rdma_ack_cm_event(event)))
537 DEBUG(DEBUG_ERR, ("disc/rdma_ack_cm_event failed with %d\n", rc));
538 event = NULL; /* don't ack more */
539
540 if (cma_id!=pctx->cm_id) {
541 DEBUG(DEBUG_ERR, ("client DISCONNECT event cm_id=%p\n", cma_id));
542 conn = talloc_get_type(cma_id->context, struct ibw_conn);
543 conn->state = IBWC_DISCONNECTED;
544 pctx->connstate_func(NULL, conn);
545 }
546 break;
547
548 case RDMA_CM_EVENT_DEVICE_REMOVAL:
549 sprintf(ibw_lasterr, "cma detected device removal!\n");
550 goto error;
551
552 default:
553 sprintf(ibw_lasterr, "unknown event %d\n", event->event);
554 goto error;
555 }
556
557 if (event!=NULL && (rc=rdma_ack_cm_event(event))) {
558 sprintf(ibw_lasterr, "rdma_ack_cm_event failed with %d\n", rc);
559 goto error;
560 }
561
562 return;
563 error:
564 DEBUG(DEBUG_ERR, ("cm event handler: %s", ibw_lasterr));
565
566 if (event!=NULL) {
567 if (cma_id!=NULL && cma_id!=pctx->cm_id) {
568 conn = talloc_get_type(cma_id->context, struct ibw_conn);
569 if (conn) {
570 conn->state = IBWC_ERROR;
571 pctx->connstate_func(NULL, conn);
572 }
573 } else {
574 ctx->state = IBWS_ERROR;
575 pctx->connstate_func(ctx, NULL);
576 }
577
578 if ((rc=rdma_ack_cm_event(event))!=0) {
579 DEBUG(DEBUG_ERR, ("rdma_ack_cm_event failed with %d\n", rc));
580 }
581 }
582
583 return;
584 }
585
586 static void ibw_event_handler_verbs(struct event_context *ev,
587 struct fd_event *fde, uint16_t flags, void *private_data)
588 {
589 struct ibw_conn *conn = talloc_get_type(private_data, struct ibw_conn);
590 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
591 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
592
593 struct ibv_wc wc;
594 int rc;
595 struct ibv_cq *ev_cq;
596 void *ev_ctx;
597
598 DEBUG(DEBUG_DEBUG, ("ibw_event_handler_verbs(%u)\n", (uint32_t)flags));
599
600 /* TODO: check whether if it's good to have more channels here... */
601 rc = ibv_get_cq_event(pconn->verbs_channel, &ev_cq, &ev_ctx);
602 if (rc) {
603 sprintf(ibw_lasterr, "Failed to get cq_event with %d\n", rc);
604 goto error;
605 }
606 if (ev_cq != pconn->cq) {
607 sprintf(ibw_lasterr, "ev_cq(%p) != pconn->cq(%p)\n", ev_cq, pconn->cq);
608 goto error;
609 }
610 rc = ibv_req_notify_cq(pconn->cq, 0);
611 if (rc) {
612 sprintf(ibw_lasterr, "Couldn't request CQ notification (%d)\n", rc);
613 goto error;
614 }
615
616 while((rc=ibv_poll_cq(pconn->cq, 1, &wc))==1) {
617 if (wc.status) {
618 sprintf(ibw_lasterr, "cq completion failed status=%d, opcode=%d, rc=%d\n",
619 wc.status, wc.opcode, rc);
620 goto error;
621 }
622
623 switch(wc.opcode) {
624 case IBV_WC_SEND:
625 DEBUG(DEBUG_DEBUG, ("send completion\n"));
626 if (ibw_wc_send(conn, &wc))
627 goto error;
628 break;
629
630 case IBV_WC_RDMA_WRITE:
631 DEBUG(DEBUG_DEBUG, ("rdma write completion\n"));
632 break;
633
634 case IBV_WC_RDMA_READ:
635 DEBUG(DEBUG_DEBUG, ("rdma read completion\n"));
636 break;
637
638 case IBV_WC_RECV:
639 DEBUG(DEBUG_DEBUG, ("recv completion\n"));
640 if (ibw_wc_recv(conn, &wc))
641 goto error;
642 break;
643
644 default:
645 sprintf(ibw_lasterr, "unknown completion %d\n", wc.opcode);
646 goto error;
647 }
648 }
649 if (rc!=0) {
650 sprintf(ibw_lasterr, "ibv_poll_cq error %d\n", rc);
651 goto error;
652 }
653
654 ibv_ack_cq_events(pconn->cq, 1);
655
656 return;
657 error:
658 ibv_ack_cq_events(pconn->cq, 1);
659
660 DEBUG(DEBUG_ERR, (ibw_lasterr));
661
662 if (conn->state!=IBWC_ERROR) {
663 conn->state = IBWC_ERROR;
664 pctx->connstate_func(NULL, conn);
665 }
666 }
667
668 static int ibw_process_queue(struct ibw_conn *conn)
669 {
670 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
671 struct ibw_ctx_priv *pctx;
672 struct ibw_wr *p;
673 int rc;
674 uint32_t msg_size;
675
676 if (pconn->queue==NULL)
677 return 0; /* NOP */
678
679 p = pconn->queue;
680
681 /* we must have at least 1 fragment to send */
682 assert(p->queued_ref_cnt>0);
683 p->queued_ref_cnt--;
684
685 pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
686 msg_size = (p->queued_ref_cnt) ? pctx->opts.recv_bufsize : p->queued_rlen;
687
688 assert(p->queued_msg!=NULL);
689 assert(msg_size!=0);
690
691 DEBUG(DEBUG_DEBUG, ("ibw_process_queue refcnt=%d msgsize=%u\n",
692 p->queued_ref_cnt, msg_size));
693
694 rc = ibw_send_packet(conn, p->queued_msg, p, msg_size);
695
696 /* was this the last fragment? */
697 if (p->queued_ref_cnt) {
698 p->queued_msg += pctx->opts.recv_bufsize;
699 } else {
700 DLIST_REMOVE2(pconn->queue, p, qprev, qnext);
701 p->queued_msg = NULL;
702 }
703
704 return rc;
705 }
706
707 static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc)
708 {
709 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
710 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
711 struct ibw_wr *p;
712 int send_index;
713
714 DEBUG(DEBUG_DEBUG, ("ibw_wc_send(cmid: %p, wr_id: %u, bl: %u)\n",
715 pconn->cm_id, (uint32_t)wc->wr_id, (uint32_t)wc->byte_len));
716
717 assert(pconn->cm_id->qp->qp_num==wc->qp_num);
718 assert(wc->wr_id >= pctx->opts.max_recv_wr);
719 send_index = wc->wr_id - pctx->opts.max_recv_wr;
720 pconn->wr_sent--;
721
722 if (send_index < pctx->opts.max_send_wr) {
723 DEBUG(DEBUG_DEBUG, ("ibw_wc_send#1 %u\n", (int)wc->wr_id));
724 p = pconn->wr_index[send_index];
725 if (p->buf_large!=NULL) {
726 if (p->ref_cnt) {
727 /* awaiting more of it... */
728 p->ref_cnt--;
729 } else {
730 ibw_free_mr(&p->buf_large, &p->mr_large);
731 DLIST_REMOVE(pconn->wr_list_used, p);
732 DLIST_ADD(pconn->wr_list_avail, p);
733 }
734 } else { /* nasty - but necessary */
735 DLIST_REMOVE(pconn->wr_list_used, p);
736 DLIST_ADD(pconn->wr_list_avail, p);
737 }
738 } else { /* "extra" request - not optimized */
739 DEBUG(DEBUG_DEBUG, ("ibw_wc_send#2 %u\n", (int)wc->wr_id));
740 for(p=pconn->extra_sent; p!=NULL; p=p->next)
741 if ((p->wr_id + pctx->opts.max_recv_wr)==(int)wc->wr_id)
742 break;
743 if (p==NULL) {
744 sprintf(ibw_lasterr, "failed to find wr_id %d\n", (int)wc->wr_id);
745 return -1;
746 }
747 if (p->ref_cnt) {
748 p->ref_cnt--;
749 } else {
750 ibw_free_mr(&p->buf_large, &p->mr_large);
751 DLIST_REMOVE(pconn->extra_sent, p);
752 DLIST_ADD(pconn->extra_avail, p);
753 }
754 }
755
756 return ibw_process_queue(conn);
757 }
758
759 static int ibw_append_to_part(struct ibw_conn_priv *pconn,
760 struct ibw_part *part, char **pp, uint32_t add_len, int info)
761 {
762 DEBUG(DEBUG_DEBUG, ("ibw_append_to_part: cmid=%p, (bs=%u, len=%u, tr=%u), al=%u, i=%u\n",
763 pconn->cm_id, part->bufsize, part->len, part->to_read, add_len, info));
764
765 /* allocate more if necessary - it's an "evergrowing" buffer... */
766 if (part->len + add_len > part->bufsize) {
767 if (part->buf==NULL) {
768 assert(part->len==0);
769 part->buf = talloc_size(pconn, add_len);
770 if (part->buf==NULL) {
771 sprintf(ibw_lasterr, "recv talloc_size error (%u) #%d\n",
772 add_len, info);
773 return -1;
774 }
775 part->bufsize = add_len;
776 } else {
777 part->buf = talloc_realloc_size(pconn,
778 part->buf, part->len + add_len);
779 if (part->buf==NULL) {
780 sprintf(ibw_lasterr, "recv realloc error (%u + %u) #%d\n",
781 part->len, add_len, info);
782 return -1;
783 }
784 }
785 part->bufsize = part->len + add_len;
786 }
787
788 /* consume pp */
789 memcpy(part->buf + part->len, *pp, add_len);
790 *pp += add_len;
791 part->len += add_len;
792 part->to_read -= add_len;
793
794 return 0;
795 }
796
797 static int ibw_wc_mem_threshold(struct ibw_conn_priv *pconn,
798 struct ibw_part *part, uint32_t threshold)
799 {
800 DEBUG(DEBUG_DEBUG, ("ibw_wc_mem_threshold: cmid=%p, (bs=%u, len=%u, tr=%u), thr=%u\n",
801 pconn->cm_id, part->bufsize, part->len, part->to_read, threshold));
802
803 if (part->bufsize > threshold) {
804 DEBUG(DEBUG_DEBUG, ("ibw_wc_mem_threshold: cmid=%p, %u > %u\n",
805 pconn->cm_id, part->bufsize, threshold));
806 talloc_free(part->buf);
807 part->buf = talloc_size(pconn, threshold);
808 if (part->buf==NULL) {
809 sprintf(ibw_lasterr, "talloc_size failed\n");
810 return -1;
811 }
812 part->bufsize = threshold;
813 }
814 return 0;
815 }
816
817 static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc)
818 {
819 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
820 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
821 struct ibw_part *part = &pconn->part;
822 char *p;
823 uint32_t remain = wc->byte_len;
824
825 DEBUG(DEBUG_DEBUG, ("ibw_wc_recv: cmid=%p, wr_id: %u, bl: %u\n",
826 pconn->cm_id, (uint32_t)wc->wr_id, remain));
827
828 assert(pconn->cm_id->qp->qp_num==wc->qp_num);
829 assert((int)wc->wr_id < pctx->opts.max_recv_wr);
830 assert(wc->byte_len <= pctx->opts.recv_bufsize);
831
832 p = pconn->buf_recv + ((int)wc->wr_id * pctx->opts.recv_bufsize);
833
834 while(remain) {
835 /* here always true: (part->len!=0 && part->to_read!=0) ||
836 (part->len==0 && part->to_read==0) */
837 if (part->len) { /* is there a partial msg to be continued? */
838 int read_len = (part->to_read<=remain) ? part->to_read : remain;
839 if (ibw_append_to_part(pconn, part, &p, read_len, 421))
840 goto error;
841 remain -= read_len;
842
843 if (part->len<=sizeof(uint32_t) && part->to_read==0) {
844 assert(part->len==sizeof(uint32_t));
845 /* set it again now... */
846 part->to_read = *((uint32_t *)(part->buf)); /* TODO: ntohl */
847 if (part->to_read<sizeof(uint32_t)) {
848 sprintf(ibw_lasterr, "got msglen=%u #2\n", part->to_read);
849 goto error;
850 }
851 part->to_read -= sizeof(uint32_t); /* it's already read */
852 }
853
854 if (part->to_read==0) {
855 if (pctx->receive_func(conn, part->buf, part->len) != 0) {
856 goto error;
857 }
858 part->len = 0; /* tells not having partial data (any more) */
859 if (ibw_wc_mem_threshold(pconn, part, pctx->opts.recv_threshold))
860 goto error;
861 }
862 } else {
863 if (remain>=sizeof(uint32_t)) {
864 uint32_t msglen = *(uint32_t *)p; /* TODO: ntohl */
865 if (msglen<sizeof(uint32_t)) {
866 sprintf(ibw_lasterr, "got msglen=%u\n", msglen);
867 goto error;
868 }
869
870 /* mostly awaited case: */
871 if (msglen<=remain) {
872 if (pctx->receive_func(conn, p, msglen) != 0) {
873 goto error;
874 }
875 p += msglen;
876 remain -= msglen;
877 } else {
878 part->to_read = msglen;
879 /* part->len is already 0 */
880 if (ibw_append_to_part(pconn, part, &p, remain, 422))
881 goto error;
882 remain = 0; /* to be continued ... */
883 /* part->to_read > 0 here */
884 }
885 } else { /* edge case: */
886 part->to_read = sizeof(uint32_t);
887 /* part->len is already 0 */
888 if (ibw_append_to_part(pconn, part, &p, remain, 423))
889 goto error;
890 remain = 0;
891 /* part->to_read > 0 here */
892 }
893 }
894 } /* <remain> is always decreased at least by 1 */
895
896 if (ibw_refill_cq_recv(conn))
897 goto error;
898
899 return 0;
900
901 error:
902 DEBUG(DEBUG_ERR, ("ibw_wc_recv error: %s", ibw_lasterr));
903 return -1;
904 }
905
906 static int ibw_process_init_attrs(struct ibw_initattr *attr, int nattr, struct ibw_opts *opts)
907 {
908 int i;
909 const char *name, *value;
910
911 DEBUG(DEBUG_DEBUG, ("ibw_process_init_attrs: nattr: %d\n", nattr));
912
913 opts->max_send_wr = IBW_MAX_SEND_WR;
914 opts->max_recv_wr = IBW_MAX_RECV_WR;
915 opts->recv_bufsize = IBW_RECV_BUFSIZE;
916 opts->recv_threshold = IBW_RECV_THRESHOLD;
917
918 for(i=0; i<nattr; i++) {
919 name = attr[i].name;
920 value = attr[i].value;
921
922 assert(name!=NULL && value!=NULL);
923 if (strcmp(name, "max_send_wr")==0)
924 opts->max_send_wr = atoi(value);
925 else if (strcmp(name, "max_recv_wr")==0)
926 opts->max_recv_wr = atoi(value);
927 else if (strcmp(name, "recv_bufsize")==0)
928 opts->recv_bufsize = atoi(value);
929 else if (strcmp(name, "recv_threshold")==0)
930 opts->recv_threshold = atoi(value);
931 else {
932 sprintf(ibw_lasterr, "ibw_init: unknown name %s\n", name);
933 return -1;
934 }
935 }
936 return 0;
937 }
938
939 struct ibw_ctx *ibw_init(struct ibw_initattr *attr, int nattr,
940 void *ctx_userdata,
941 ibw_connstate_fn_t ibw_connstate,
942 ibw_receive_fn_t ibw_receive,
943 struct event_context *ectx)
944 {
945 struct ibw_ctx *ctx = talloc_zero(NULL, struct ibw_ctx);
946 struct ibw_ctx_priv *pctx;
947 int rc;
948
949 DEBUG(DEBUG_DEBUG, ("ibw_init(ctx_userdata: %p, ectx: %p)\n", ctx_userdata, ectx));
950
951 /* initialize basic data structures */
952 memset(ibw_lasterr, 0, IBW_LASTERR_BUFSIZE);
953
954 assert(ctx!=NULL);
955 ibw_lasterr[0] = '\0';
956 talloc_set_destructor(ctx, ibw_ctx_destruct);
957 ctx->ctx_userdata = ctx_userdata;
958
959 pctx = talloc_zero(ctx, struct ibw_ctx_priv);
960 talloc_set_destructor(pctx, ibw_ctx_priv_destruct);
961 ctx->internal = (void *)pctx;
962 assert(pctx!=NULL);
963
964 pctx->connstate_func = ibw_connstate;
965 pctx->receive_func = ibw_receive;
966
967 pctx->ectx = ectx;
968
969 /* process attributes */
970 if (ibw_process_init_attrs(attr, nattr, &pctx->opts))
971 goto cleanup;
972
973 /* init cm */
974 pctx->cm_channel = rdma_create_event_channel();
975 if (!pctx->cm_channel) {
976 sprintf(ibw_lasterr, "rdma_create_event_channel error %d\n", errno);
977 goto cleanup;
978 }
979
980 pctx->cm_channel_event = event_add_fd(pctx->ectx, pctx,
981 pctx->cm_channel->fd, EVENT_FD_READ, ibw_event_handler_cm, ctx);
982
983 #if RDMA_USER_CM_MAX_ABI_VERSION >= 2
984 rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx, RDMA_PS_TCP);
985 #else
986 rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx);
987 #endif
988 if (rc) {
989 rc = errno;
990 sprintf(ibw_lasterr, "rdma_create_id error %d\n", rc);
991 goto cleanup;
992 }
993 DEBUG(DEBUG_DEBUG, ("created cm_id %p\n", pctx->cm_id));
994
995 pctx->pagesize = sysconf(_SC_PAGESIZE);
996
997 return ctx;
998 /* don't put code here */
999 cleanup:
1000 DEBUG(DEBUG_ERR, (ibw_lasterr));
1001
1002 if (ctx)
1003 talloc_free(ctx);
1004
1005 return NULL;
1006 }
1007
1008 int ibw_stop(struct ibw_ctx *ctx)
1009 {
1010 struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal;
1011 struct ibw_conn *p;
1012
1013 DEBUG(DEBUG_DEBUG, ("ibw_stop\n"));
1014
1015 for(p=ctx->conn_list; p!=NULL; p=p->next) {
1016 if (ctx->state==IBWC_ERROR || ctx->state==IBWC_CONNECTED) {
1017 if (ibw_disconnect(p))
1018 return -1;
1019 }
1020 }
1021
1022 ctx->state = IBWS_STOPPED;
1023 pctx->connstate_func(ctx, NULL);
1024
1025 return 0;
1026 }
1027
1028 int ibw_bind(struct ibw_ctx *ctx, struct sockaddr_in *my_addr)
1029 {
1030 struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal;
1031 int rc;
1032
1033 DEBUG(DEBUG_DEBUG, ("ibw_bind: addr=%s, port=%u\n",
1034 inet_ntoa(my_addr->sin_addr), ntohs(my_addr->sin_port)));
1035 rc = rdma_bind_addr(pctx->cm_id, (struct sockaddr *) my_addr);
1036 if (rc) {
1037 sprintf(ibw_lasterr, "rdma_bind_addr error %d\n", rc);
1038 DEBUG(DEBUG_ERR, (ibw_lasterr));
1039 return rc;
1040 }
1041 DEBUG(DEBUG_DEBUG, ("rdma_bind_addr successful\n"));
1042
1043 return 0;
1044 }
1045
1046 int ibw_listen(struct ibw_ctx *ctx, int backlog)
1047 {
1048 struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv);
1049 int rc;
1050
1051 DEBUG(DEBUG_DEBUG, ("ibw_listen\n"));
1052 rc = rdma_listen(pctx->cm_id, backlog);
1053 if (rc) {
1054 sprintf(ibw_lasterr, "rdma_listen failed: %d\n", rc);
1055 DEBUG(DEBUG_ERR, (ibw_lasterr));
1056 return rc;
1057 }
1058
1059 return 0;
1060 }
1061
1062 int ibw_accept(struct ibw_ctx *ctx, struct ibw_conn *conn, void *conn_userdata)
1063 {
1064 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1065 struct rdma_conn_param conn_param;
1066 int rc;
1067
1068 DEBUG(DEBUG_DEBUG, ("ibw_accept: cmid=%p\n", pconn->cm_id));
1069 conn->conn_userdata = conn_userdata;
1070
1071 memset(&conn_param, 0, sizeof(struct rdma_conn_param));
1072 conn_param.responder_resources = 1;
1073 conn_param.initiator_depth = 1;
1074 rc = rdma_accept(pconn->cm_id, &conn_param);
1075 if (rc) {
1076 sprintf(ibw_lasterr, "rdma_accept failed %d\n", rc);
1077 DEBUG(DEBUG_ERR, (ibw_lasterr));
1078 return -1;;
1079 }
1080
1081 pconn->is_accepted = 1;
1082
1083 /* continued at RDMA_CM_EVENT_ESTABLISHED */
1084
1085 return 0;
1086 }
1087
1088 int ibw_connect(struct ibw_conn *conn, struct sockaddr_in *serv_addr, void *conn_userdata)
1089 {
1090 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1091 struct ibw_conn_priv *pconn = NULL;
1092 int rc;
1093
1094 assert(conn!=NULL);
1095
1096 conn->conn_userdata = conn_userdata;
1097 pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1098 DEBUG(DEBUG_DEBUG, ("ibw_connect: addr=%s, port=%u\n", inet_ntoa(serv_addr->sin_addr),
1099 ntohs(serv_addr->sin_port)));
1100
1101 /* clean previous - probably half - initialization */
1102 if (ibw_conn_priv_destruct(pconn)) {
1103 DEBUG(DEBUG_ERR, ("ibw_connect/ibw_pconn_destruct failed for cm_id=%p\n", pconn->cm_id));
1104 return -1;
1105 }
1106
1107 /* init cm */
1108 #if RDMA_USER_CM_MAX_ABI_VERSION >= 2
1109 rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn, RDMA_PS_TCP);
1110 #else
1111 rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn);
1112 #endif
1113 if (rc) {
1114 rc = errno;
1115 sprintf(ibw_lasterr, "ibw_connect/rdma_create_id error %d\n", rc);
1116 talloc_free(conn);
1117 return -1;
1118 }
1119 DEBUG(DEBUG_DEBUG, ("ibw_connect: rdma_create_id succeeded, cm_id=%p\n", pconn->cm_id));
1120
1121 rc = rdma_resolve_addr(pconn->cm_id, NULL, (struct sockaddr *) serv_addr, 2000);
1122 if (rc) {
1123 sprintf(ibw_lasterr, "rdma_resolve_addr error %d\n", rc);
1124 DEBUG(DEBUG_ERR, (ibw_lasterr));
1125 talloc_free(conn);
1126 return -1;
1127 }
1128
1129 /* continued at RDMA_CM_EVENT_ADDR_RESOLVED */
1130
1131 return 0;
1132 }
1133
1134 int ibw_disconnect(struct ibw_conn *conn)
1135 {
1136 int rc;
1137 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1138
1139 DEBUG(DEBUG_DEBUG, ("ibw_disconnect: cmid=%p\n", pconn->cm_id));
1140
1141 assert(pconn!=NULL);
1142
1143 switch(conn->state) {
1144 case IBWC_ERROR:
1145 ibw_conn_priv_destruct(pconn); /* do this here right now */
1146 break;
1147 case IBWC_CONNECTED:
1148 rc = rdma_disconnect(pconn->cm_id);
1149 if (rc) {
1150 sprintf(ibw_lasterr, "ibw_disconnect failed with %d\n", rc);
1151 DEBUG(DEBUG_ERR, (ibw_lasterr));
1152 return rc;
1153 }
1154 break;
1155 default:
1156 DEBUG(DEBUG_DEBUG, ("invalid state for disconnect: %d\n", conn->state));
1157 break;
1158 }
1159
1160 return 0;
1161 }
1162
1163 int ibw_alloc_send_buf(struct ibw_conn *conn, void **buf, void **key, uint32_t len)
1164 {
1165 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1166 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1167 struct ibw_wr *p = pconn->wr_list_avail;
1168
1169 if (p!=NULL) {
1170 DEBUG(DEBUG_DEBUG, ("ibw_alloc_send_buf#1: cmid=%p, len=%d\n", pconn->cm_id, len));
1171
1172 DLIST_REMOVE(pconn->wr_list_avail, p);
1173 DLIST_ADD(pconn->wr_list_used, p);
1174
1175 if (len <= pctx->opts.recv_bufsize) {
1176 *buf = (void *)p->buf;
1177 } else {
1178 p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large);
1179 if (p->buf_large==NULL) {
1180 sprintf(ibw_lasterr, "ibw_alloc_mr#1 failed\n");
1181 goto error;
1182 }
1183 *buf = (void *)p->buf_large;
1184 }
1185 /* p->wr_id is already filled in ibw_init_memory */
1186 } else {
1187 DEBUG(DEBUG_DEBUG, ("ibw_alloc_send_buf#2: cmid=%p, len=%d\n", pconn->cm_id, len));
1188 /* not optimized */
1189 p = pconn->extra_avail;
1190 if (!p) {
1191 p = pconn->extra_avail = talloc_zero(pconn, struct ibw_wr);
1192 talloc_set_destructor(p, ibw_wr_destruct);
1193 if (p==NULL) {
1194 sprintf(ibw_lasterr, "talloc_zero failed (emax: %u)\n", pconn->extra_max);
1195 goto error;
1196 }
1197 p->wr_id = pctx->opts.max_send_wr + pconn->extra_max;
1198 pconn->extra_max++;
1199 switch(pconn->extra_max) {
1200 case 1: DEBUG(DEBUG_INFO, ("warning: queue performed\n")); break;
1201 case 10: DEBUG(DEBUG_INFO, ("warning: queue reached 10\n")); break;
1202 case 100: DEBUG(DEBUG_INFO, ("warning: queue reached 100\n")); break;
1203 case 1000: DEBUG(DEBUG_INFO, ("warning: queue reached 1000\n")); break;
1204 default: break;
1205 }
1206 }
1207
1208 p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large);
1209 if (p->buf_large==NULL) {
1210 sprintf(ibw_lasterr, "ibw_alloc_mr#2 failed\n");
1211 goto error;
1212 }
1213 *buf = (void *)p->buf_large;
1214
1215 DLIST_REMOVE(pconn->extra_avail, p);
1216 /* we don't have prepared index for this, so that
1217 * we will have to find this by wr_id later on */
1218 DLIST_ADD(pconn->extra_sent, p);
1219 }
1220
1221 *key = (void *)p;
1222
1223 return 0;
1224 error:
1225 DEBUG(DEBUG_ERR, ("ibw_alloc_send_buf error: %s", ibw_lasterr));
1226 return -1;
1227 }
1228
1229
1230 static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len)
1231 {
1232 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1233 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1234 int rc;
1235
1236 /* can we send it right now? */
1237 if (pconn->wr_sent<pctx->opts.max_send_wr) {
1238 struct ibv_send_wr *bad_wr;
1239 struct ibv_sge list = {
1240 .addr = (uintptr_t)buf,
1241 .length = len,
1242 .lkey = pconn->mr_send->lkey
1243 };
1244 struct ibv_send_wr wr = {
1245 .wr_id = p->wr_id + pctx->opts.max_recv_wr,
1246 .sg_list = &list,
1247 .num_sge = 1,
1248 .opcode = IBV_WR_SEND,
1249 .send_flags = IBV_SEND_SIGNALED,
1250 };
1251
1252 if (p->buf_large==NULL) {
1253 DEBUG(DEBUG_DEBUG, ("ibw_send#normal(cmid: %p, wrid: %u, n: %d)\n",
1254 pconn->cm_id, (uint32_t)wr.wr_id, len));
1255 } else {
1256 DEBUG(DEBUG_DEBUG, ("ibw_send#large(cmid: %p, wrid: %u, n: %d)\n",
1257 pconn->cm_id, (uint32_t)wr.wr_id, len));
1258 list.lkey = p->mr_large->lkey;
1259 }
1260
1261 rc = ibv_post_send(pconn->cm_id->qp, &wr, &bad_wr);
1262 if (rc) {
1263 sprintf(ibw_lasterr, "ibv_post_send error %d (%d)\n",
1264 rc, pconn->wr_sent);
1265 goto error;
1266 }
1267
1268 pconn->wr_sent++;
1269
1270 return rc;
1271 } /* else put the request into our own queue: */
1272
1273 DEBUG(DEBUG_DEBUG, ("ibw_send#queued(cmid: %p, len: %u)\n", pconn->cm_id, len));
1274
1275 /* TODO: clarify how to continue when state==IBWC_STOPPED */
1276
1277 /* to be sent by ibw_wc_send */
1278 /* regardless "normal" or [a part of] "large" packet */
1279 if (!p->queued_ref_cnt) {
1280 DLIST_ADD_END2(pconn->queue, p, struct ibw_wr *,
1281 qprev, qnext); /* TODO: optimize */
1282 p->queued_msg = buf;
1283 }
1284 p->queued_ref_cnt++;
1285 p->queued_rlen = len; /* last wins; see ibw_wc_send */
1286
1287 return 0;
1288 error:
1289 DEBUG(DEBUG_ERR, (ibw_lasterr));
1290 return -1;
1291 }
1292
1293 int ibw_send(struct ibw_conn *conn, void *buf, void *key, uint32_t len)
1294 {
1295 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1296 struct ibw_wr *p = talloc_get_type(key, struct ibw_wr);
1297 int rc;
1298
1299 assert(len>=sizeof(uint32_t));
1300 assert((*((uint32_t *)buf)==len)); /* TODO: htonl */
1301
1302 if (len > pctx->opts.recv_bufsize) {
1303 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1304 int rlen = len;
1305 char *packet = (char *)buf;
1306 uint32_t recv_bufsize = pctx->opts.recv_bufsize;
1307
1308 DEBUG(DEBUG_DEBUG, ("ibw_send#frag(cmid: %p, buf: %p, len: %u)\n",
1309 pconn->cm_id, buf, len));
1310
1311 /* single threaded => no race here: */
1312 assert(p->ref_cnt==0);
1313 while(rlen > recv_bufsize) {
1314 rc = ibw_send_packet(conn, packet, p, recv_bufsize);
1315 if (rc)
1316 return rc;
1317 packet += recv_bufsize;
1318 rlen -= recv_bufsize;
1319 p->ref_cnt++; /* not good to have it in ibw_send_packet */
1320 }
1321 if (rlen) {
1322 rc = ibw_send_packet(conn, packet, p, rlen);
1323 p->ref_cnt++; /* not good to have it in ibw_send_packet */
1324 }
1325 p->ref_cnt--; /* for the same handling */
1326 } else {
1327 assert(p->ref_cnt==0);
1328 assert(p->queued_ref_cnt==0);
1329
1330 rc = ibw_send_packet(conn, buf, p, len);
1331 }
1332 return rc;
1333 }
1334
1335 int ibw_cancel_send_buf(struct ibw_conn *conn, void *buf, void *key)
1336 {
1337 struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv);
1338 struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv);
1339 struct ibw_wr *p = talloc_get_type(key, struct ibw_wr);
1340
1341 assert(p!=NULL);
1342 assert(buf!=NULL);
1343 assert(conn!=NULL);
1344
1345 if (p->buf_large!=NULL)
1346 ibw_free_mr(&p->buf_large, &p->mr_large);
1347
1348 /* parallel case */
1349 if (p->wr_id < pctx->opts.max_send_wr) {
1350 DEBUG(DEBUG_DEBUG, ("ibw_cancel_send_buf#1 %u", (int)p->wr_id));
1351 DLIST_REMOVE(pconn->wr_list_used, p);
1352 DLIST_ADD(pconn->wr_list_avail, p);
1353 } else { /* "extra" packet */
1354 DEBUG(DEBUG_DEBUG, ("ibw_cancel_send_buf#2 %u", (int)p->wr_id));
1355 DLIST_REMOVE(pconn->extra_sent, p);
1356 DLIST_ADD(pconn->extra_avail, p);
1357 }
1358
1359 return 0;
1360 }
1361
1362 const char *ibw_getLastError(void)
1363 {
1364 return ibw_lasterr;
1365 }
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