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rdma: use private random state
[fio.git] / engines / rdma.c
CommitLineData
21b8aee8 1/*
85286c5c 2 * RDMA I/O engine
21b8aee8 3 *
85286c5c
BVA		 4 * RDMA I/O engine based on the IB verbs and RDMA/CM user space libraries.
5 * Supports both RDMA memory semantics and channel semantics
6 * for the InfiniBand, RoCE and iWARP protocols.
21b8aee8 7 *
85286c5c 8 * This I/O engine is disabled by default. To enable it, execute:
21b8aee8 9 *
7d7803fa
YR		 10 * $ export EXTFLAGS+=" -DFIO_HAVE_RDMA "
11 * $ export EXTLIBS+=" -libverbs -lrdmacm "
21b8aee8 12 *
85286c5c
BVA		 13 * before running make. You will need the Linux RDMA software as well, either
14 * from your Linux distributor or directly from openfabrics.org:
21b8aee8 15 *
16 * http://www.openfabrics.org/downloads/OFED/
17 *
7d7803fa
YR		 18 * Exchanging steps of RDMA ioengine control messages:
19 * 1. client side sends test mode (RDMA_WRITE/RDMA_READ/SEND)
20 * to server side.
21 * 2. server side parses test mode, and sends back confirmation
22 * to client side. In RDMA WRITE/READ test, this confirmation
23 * includes memory information, such as rkey, address.
24 * 3. client side initiates test loop.
25 * 4. In RDMA WRITE/READ test, client side sends a completion
26 * notification to server side. Server side updates its
27 * td->done as true.
28 *
21b8aee8 29 */
30#include <stdio.h>
31#include <stdlib.h>
32#include <unistd.h>
33#include <errno.h>
34#include <assert.h>
35#include <netinet/in.h>
36#include <arpa/inet.h>
37#include <netdb.h>
38#include <sys/poll.h>
39#include <sys/types.h>
40#include <sys/socket.h>
41#include <sys/time.h>
42#include <sys/resource.h>
43
44#include <byteswap.h>
45#include <pthread.h>
46#include <inttypes.h>
47
48#include "../fio.h"
49
50#ifdef FIO_HAVE_RDMA
51
52#include <rdma/rdma_cma.h>
53#include <infiniband/arch.h>
54
7d7803fa 55#define FIO_RDMA_MAX_IO_DEPTH 512
21b8aee8 56
57enum rdma_io_mode {
58 FIO_RDMA_UNKNOWN = 0,
59 FIO_RDMA_MEM_WRITE,
60 FIO_RDMA_MEM_READ,
61 FIO_RDMA_CHA_SEND,
62 FIO_RDMA_CHA_RECV
63};
64
65struct remote_u {
66 uint64_t buf;
67 uint32_t rkey;
68 uint32_t size;
69};
70
71struct rdma_info_blk {
72 uint32_t mode; /* channel semantic or memory semantic */
73 uint32_t nr; /* client: io depth
74 server: number of records for memory semantic
75 */
76cc5224 76 struct remote_u rmt_us[FIO_RDMA_MAX_IO_DEPTH];
21b8aee8 77};
78
79struct rdma_io_u_data {
80 uint64_t wr_id;
81 struct ibv_send_wr sq_wr;
82 struct ibv_recv_wr rq_wr;
83 struct ibv_sge rdma_sgl;
84};
85
86struct rdmaio_data {
87 int is_client;
88 enum rdma_io_mode rdma_protocol;
89 char host[64];
90 struct sockaddr_in addr;
91
92 struct ibv_recv_wr rq_wr;
93 struct ibv_sge recv_sgl;
94 struct rdma_info_blk recv_buf;
95 struct ibv_mr *recv_mr;
96
97 struct ibv_send_wr sq_wr;
98 struct ibv_sge send_sgl;
99 struct rdma_info_blk send_buf;
100 struct ibv_mr *send_mr;
101
102 struct ibv_comp_channel *channel;
103 struct ibv_cq *cq;
104 struct ibv_pd *pd;
105 struct ibv_qp *qp;
106
107 pthread_t cmthread;
108 struct rdma_event_channel *cm_channel;
109 struct rdma_cm_id *cm_id;
110 struct rdma_cm_id *child_cm_id;
111
112 int cq_event_num;
113
114 struct remote_u *rmt_us;
115 int rmt_nr;
116 struct io_u **io_us_queued;
117 int io_u_queued_nr;
118 struct io_u **io_us_flight;
119 int io_u_flight_nr;
120 struct io_u **io_us_completed;
121 int io_u_completed_nr;
ea6209ad
JA		 122
123 struct frand_state rand_state;
21b8aee8 124};
125
126static int client_recv(struct thread_data *td, struct ibv_wc *wc)
127{
128 struct rdmaio_data *rd = td->io_ops->data;
129
130 if (wc->byte_len != sizeof(rd->recv_buf)) {
b6cf38f0 131 log_err("Received bogus data, size %d\n", wc->byte_len);
21b8aee8 132 return 1;
133 }
134
135 /* store mr info for MEMORY semantic */
136 if ((rd->rdma_protocol == FIO_RDMA_MEM_WRITE) ||
137 (rd->rdma_protocol == FIO_RDMA_MEM_READ)) {
138 /* struct flist_head *entry; */
139 int i = 0;
140
141 rd->rmt_nr = ntohl(rd->recv_buf.nr);
142
143 for (i = 0; i < rd->rmt_nr; i++) {
144 rd->rmt_us[i].buf = ntohll(rd->recv_buf.rmt_us[i].buf);
145 rd->rmt_us[i].rkey = ntohl(rd->recv_buf.rmt_us[i].rkey);
146 rd->rmt_us[i].size = ntohl(rd->recv_buf.rmt_us[i].size);
147
148 dprint(FD_IO,
149 "fio: Received rkey %x addr %" PRIx64
150 " len %d from peer\n", rd->rmt_us[i].rkey,
151 rd->rmt_us[i].buf, rd->rmt_us[i].size);
152 }
153 }
154
155 return 0;
156}
157
158static int server_recv(struct thread_data *td, struct ibv_wc *wc)
159{
160 struct rdmaio_data *rd = td->io_ops->data;
161
76cc5224 162 if (wc->wr_id == FIO_RDMA_MAX_IO_DEPTH) {
21b8aee8 163 rd->rdma_protocol = ntohl(rd->recv_buf.mode);
164
165 /* CHANNEL semantic, do nothing */
166 if (rd->rdma_protocol == FIO_RDMA_CHA_SEND)
167 rd->rdma_protocol = FIO_RDMA_CHA_RECV;
168 }
169
170 return 0;
171}
172
173static int cq_event_handler(struct thread_data *td, enum ibv_wc_opcode opcode)
174{
175 struct rdmaio_data *rd = td->io_ops->data;
176 struct ibv_wc wc;
177 struct rdma_io_u_data *r_io_u_d;
178 int ret;
179 int compevnum = 0;
180 int i;
181
182 while ((ret = ibv_poll_cq(rd->cq, 1, &wc)) == 1) {
183 ret = 0;
184 compevnum++;
185
186 if (wc.status) {
187 log_err("fio: cq completion status %d(%s)\n",
188 wc.status, ibv_wc_status_str(wc.status));
189 return -1;
190 }
191
192 switch (wc.opcode) {
193
194 case IBV_WC_RECV:
195 if (rd->is_client == 1)
196 client_recv(td, &wc);
197 else
198 server_recv(td, &wc);
199
76cc5224 200 if (wc.wr_id == FIO_RDMA_MAX_IO_DEPTH)
21b8aee8 201 break;
202
203 for (i = 0; i < rd->io_u_flight_nr; i++) {
204 r_io_u_d = rd->io_us_flight[i]->engine_data;
205
206 if (wc.wr_id == r_io_u_d->rq_wr.wr_id) {
207 rd->io_us_flight[i]->resid =
208 rd->io_us_flight[i]->buflen
209 - wc.byte_len;
210
211 rd->io_us_flight[i]->error = 0;
212
213 rd->io_us_completed[rd->
214 io_u_completed_nr]
215 = rd->io_us_flight[i];
216 rd->io_u_completed_nr++;
217 break;
218 }
219 }
220 if (i == rd->io_u_flight_nr)
e07f72d3 221 log_err("fio: recv wr %" PRId64 " not found\n",
21b8aee8 222 wc.wr_id);
223 else {
224 /* put the last one into middle of the list */
225 rd->io_us_flight[i] =
226 rd->io_us_flight[rd->io_u_flight_nr - 1];
227 rd->io_u_flight_nr--;
228 }
229
230 break;
231
232 case IBV_WC_SEND:
233 case IBV_WC_RDMA_WRITE:
234 case IBV_WC_RDMA_READ:
76cc5224 235 if (wc.wr_id == FIO_RDMA_MAX_IO_DEPTH)
21b8aee8 236 break;
237
238 for (i = 0; i < rd->io_u_flight_nr; i++) {
239 r_io_u_d = rd->io_us_flight[i]->engine_data;
240
241 if (wc.wr_id == r_io_u_d->sq_wr.wr_id) {
242 rd->io_us_completed[rd->
243 io_u_completed_nr]
244 = rd->io_us_flight[i];
245 rd->io_u_completed_nr++;
246 break;
247 }
248 }
249 if (i == rd->io_u_flight_nr)
e07f72d3 250 log_err("fio: send wr %" PRId64 " not found\n",
21b8aee8 251 wc.wr_id);
252 else {
253 /* put the last one into middle of the list */
254 rd->io_us_flight[i] =
255 rd->io_us_flight[rd->io_u_flight_nr - 1];
256 rd->io_u_flight_nr--;
257 }
258
259 break;
260
261 default:
262 log_info("fio: unknown completion event %d\n",
263 wc.opcode);
264 return -1;
265 }
266 rd->cq_event_num++;
267 }
268 if (ret) {
269 log_err("fio: poll error %d\n", ret);
270 return 1;
271 }
272
273 return compevnum;
274}
275
276/*
277 * Return -1 for error and 'nr events' for a positive number
278 * of events
279 */
280static int rdma_poll_wait(struct thread_data *td, enum ibv_wc_opcode opcode)
281{
282 struct rdmaio_data *rd = td->io_ops->data;
283 struct ibv_cq *ev_cq;
284 void *ev_ctx;
285 int ret;
286
287 if (rd->cq_event_num > 0) { /* previous left */
288 rd->cq_event_num--;
289 return 0;
290 }
291
292again:
293 if (ibv_get_cq_event(rd->channel, &ev_cq, &ev_ctx) != 0) {
294 log_err("fio: Failed to get cq event!\n");
295 return -1;
296 }
297 if (ev_cq != rd->cq) {
298 log_err("fio: Unknown CQ!\n");
299 return -1;
300 }
301 if (ibv_req_notify_cq(rd->cq, 0) != 0) {
302 log_err("fio: Failed to set notify!\n");
303 return -1;
304 }
305
306 ret = cq_event_handler(td, opcode);
307 if (ret < 1)
308 goto again;
309
310 ibv_ack_cq_events(rd->cq, ret);
311
312 rd->cq_event_num--;
313
314 return ret;
315}
316
317static int fio_rdmaio_setup_qp(struct thread_data *td)
318{
319 struct rdmaio_data *rd = td->io_ops->data;
320 struct ibv_qp_init_attr init_attr;
321 int qp_depth = td->o.iodepth * 2; /* 2 times of io depth */
322
323 if (rd->is_client == 0)
324 rd->pd = ibv_alloc_pd(rd->child_cm_id->verbs);
325 else
326 rd->pd = ibv_alloc_pd(rd->cm_id->verbs);
327 if (rd->pd == NULL) {
328 log_err("fio: ibv_alloc_pd fail\n");
329 return 1;
330 }
331
332 if (rd->is_client == 0)
333 rd->channel = ibv_create_comp_channel(rd->child_cm_id->verbs);
334 else
335 rd->channel = ibv_create_comp_channel(rd->cm_id->verbs);
336 if (rd->channel == NULL) {
337 log_err("fio: ibv_create_comp_channel fail\n");
338 goto err1;
339 }
340
341 if (qp_depth < 16)
342 qp_depth = 16;
343
344 if (rd->is_client == 0)
345 rd->cq = ibv_create_cq(rd->child_cm_id->verbs,
346 qp_depth, rd, rd->channel, 0);
347 else
348 rd->cq = ibv_create_cq(rd->cm_id->verbs,
349 qp_depth, rd, rd->channel, 0);
350 if (rd->cq == NULL) {
351 log_err("fio: ibv_create_cq failed\n");
352 goto err2;
353 }
354
355 if (ibv_req_notify_cq(rd->cq, 0) != 0) {
356 log_err("fio: ibv_create_cq failed\n");
357 goto err3;
358 }
359
360 /* create queue pair */
361 memset(&init_attr, 0, sizeof(init_attr));
362 init_attr.cap.max_send_wr = qp_depth;
363 init_attr.cap.max_recv_wr = qp_depth;
364 init_attr.cap.max_recv_sge = 1;
365 init_attr.cap.max_send_sge = 1;
366 init_attr.qp_type = IBV_QPT_RC;
367 init_attr.send_cq = rd->cq;
368 init_attr.recv_cq = rd->cq;
369
370 if (rd->is_client == 0) {
371 if (rdma_create_qp(rd->child_cm_id, rd->pd, &init_attr) != 0) {
372 log_err("fio: rdma_create_qp failed\n");
373 goto err3;
374 }
375 rd->qp = rd->child_cm_id->qp;
376 } else {
377 if (rdma_create_qp(rd->cm_id, rd->pd, &init_attr) != 0) {
378 log_err("fio: rdma_create_qp failed\n");
379 goto err3;
380 }
381 rd->qp = rd->cm_id->qp;
382 }
383
384 return 0;
385
386err3:
387 ibv_destroy_cq(rd->cq);
388err2:
389 ibv_destroy_comp_channel(rd->channel);
390err1:
391 ibv_dealloc_pd(rd->pd);
392
393 return 1;
394}
395
396static int fio_rdmaio_setup_control_msg_buffers(struct thread_data *td)
397{
398 struct rdmaio_data *rd = td->io_ops->data;
399
400 rd->recv_mr = ibv_reg_mr(rd->pd, &rd->recv_buf, sizeof(rd->recv_buf),
401 IBV_ACCESS_LOCAL_WRITE);
402 if (rd->recv_mr == NULL) {
403 log_err("fio: recv_buf reg_mr failed\n");
404 return 1;
405 }
406
407 rd->send_mr = ibv_reg_mr(rd->pd, &rd->send_buf, sizeof(rd->send_buf),
408 0);
409 if (rd->send_mr == NULL) {
410 log_err("fio: send_buf reg_mr failed\n");
411 ibv_dereg_mr(rd->recv_mr);
412 return 1;
413 }
414
415 /* setup work request */
416 /* recv wq */
417 rd->recv_sgl.addr = (uint64_t) (unsigned long)&rd->recv_buf;
418 rd->recv_sgl.length = sizeof rd->recv_buf;
419 rd->recv_sgl.lkey = rd->recv_mr->lkey;
420 rd->rq_wr.sg_list = &rd->recv_sgl;
421 rd->rq_wr.num_sge = 1;
76cc5224 422 rd->rq_wr.wr_id = FIO_RDMA_MAX_IO_DEPTH;
21b8aee8 423
424 /* send wq */
425 rd->send_sgl.addr = (uint64_t) (unsigned long)&rd->send_buf;
426 rd->send_sgl.length = sizeof rd->send_buf;
427 rd->send_sgl.lkey = rd->send_mr->lkey;
428
429 rd->sq_wr.opcode = IBV_WR_SEND;
430 rd->sq_wr.send_flags = IBV_SEND_SIGNALED;
431 rd->sq_wr.sg_list = &rd->send_sgl;
432 rd->sq_wr.num_sge = 1;
76cc5224 433 rd->sq_wr.wr_id = FIO_RDMA_MAX_IO_DEPTH;
21b8aee8 434
435 return 0;
436}
437
438static int get_next_channel_event(struct thread_data *td,
439 struct rdma_event_channel *channel,
440 enum rdma_cm_event_type wait_event)
441{
442 struct rdmaio_data *rd = td->io_ops->data;
443
444 int ret;
445 struct rdma_cm_event *event;
446
447 ret = rdma_get_cm_event(channel, &event);
448 if (ret) {
449 log_err("fio: rdma_get_cm_event");
450 return 1;
451 }
452
453 if (event->event != wait_event) {
454 log_err("fio: event is %s instead of %s\n",
455 rdma_event_str(event->event),
456 rdma_event_str(wait_event));
457 return 1;
458 }
459
460 switch (event->event) {
461 case RDMA_CM_EVENT_CONNECT_REQUEST:
462 rd->child_cm_id = event->id;
463 break;
464 default:
465 break;
466 }
467
468 rdma_ack_cm_event(event);
469
470 return 0;
471}
472
473static int fio_rdmaio_prep(struct thread_data *td, struct io_u *io_u)
474{
475 struct rdmaio_data *rd = td->io_ops->data;
476 struct rdma_io_u_data *r_io_u_d;
477
478 r_io_u_d = io_u->engine_data;
479
480 switch (rd->rdma_protocol) {
481 case FIO_RDMA_MEM_WRITE:
482 case FIO_RDMA_MEM_READ:
483 r_io_u_d->rdma_sgl.addr = (uint64_t) (unsigned long)io_u->buf;
484 r_io_u_d->rdma_sgl.lkey = io_u->mr->lkey;
485 r_io_u_d->sq_wr.wr_id = r_io_u_d->wr_id;
486 r_io_u_d->sq_wr.send_flags = IBV_SEND_SIGNALED;
487 r_io_u_d->sq_wr.sg_list = &r_io_u_d->rdma_sgl;
488 r_io_u_d->sq_wr.num_sge = 1;
489 break;
490 case FIO_RDMA_CHA_SEND:
491 r_io_u_d->rdma_sgl.addr = (uint64_t) (unsigned long)io_u->buf;
492 r_io_u_d->rdma_sgl.lkey = io_u->mr->lkey;
493 r_io_u_d->rdma_sgl.length = io_u->buflen;
494 r_io_u_d->sq_wr.wr_id = r_io_u_d->wr_id;
495 r_io_u_d->sq_wr.opcode = IBV_WR_SEND;
496 r_io_u_d->sq_wr.send_flags = IBV_SEND_SIGNALED;
497 r_io_u_d->sq_wr.sg_list = &r_io_u_d->rdma_sgl;
498 r_io_u_d->sq_wr.num_sge = 1;
499 break;
500 case FIO_RDMA_CHA_RECV:
501 r_io_u_d->rdma_sgl.addr = (uint64_t) (unsigned long)io_u->buf;
502 r_io_u_d->rdma_sgl.lkey = io_u->mr->lkey;
503 r_io_u_d->rdma_sgl.length = io_u->buflen;
504 r_io_u_d->rq_wr.wr_id = r_io_u_d->wr_id;
505 r_io_u_d->rq_wr.sg_list = &r_io_u_d->rdma_sgl;
506 r_io_u_d->rq_wr.num_sge = 1;
507 break;
508 default:
509 log_err("fio: unknown rdma protocol - %d\n", rd->rdma_protocol);
510 break;
511 }
512
513 return 0;
514}
515
516static struct io_u *fio_rdmaio_event(struct thread_data *td, int event)
517{
518 struct rdmaio_data *rd = td->io_ops->data;
519 struct io_u *io_u;
520 int i;
521
522 io_u = rd->io_us_completed[0];
523 for (i = 0; i < rd->io_u_completed_nr - 1; i++) {
524 rd->io_us_completed[i] = rd->io_us_completed[i + 1];
525 }
526 rd->io_u_completed_nr--;
527
528 dprint_io_u(io_u, "fio_rdmaio_event");
529
530 return io_u;
531}
532
533static int fio_rdmaio_getevents(struct thread_data *td, unsigned int min,
534 unsigned int max, struct timespec *t)
535{
536 struct rdmaio_data *rd = td->io_ops->data;
537 int r;
538 enum ibv_wc_opcode comp_opcode;
539 comp_opcode = IBV_WC_RDMA_WRITE;
540 struct ibv_cq *ev_cq;
541 void *ev_ctx;
542 int ret;
543
544 r = 0;
545
546 switch (rd->rdma_protocol) {
547 case FIO_RDMA_MEM_WRITE:
548 comp_opcode = IBV_WC_RDMA_WRITE;
549 break;
550 case FIO_RDMA_MEM_READ:
551 comp_opcode = IBV_WC_RDMA_READ;
552 break;
553 case FIO_RDMA_CHA_SEND:
554 comp_opcode = IBV_WC_SEND;
555 break;
556 case FIO_RDMA_CHA_RECV:
557 comp_opcode = IBV_WC_RECV;
558 break;
559 default:
560 log_err("fio: unknown rdma protocol - %d\n", rd->rdma_protocol);
561 break;
562 }
563
564 if (rd->cq_event_num > 0) { /* previous left */
565 rd->cq_event_num--;
566 return 0;
567 }
568
569again:
570 if (ibv_get_cq_event(rd->channel, &ev_cq, &ev_ctx) != 0) {
571 log_err("fio: Failed to get cq event!\n");
572 return -1;
573 }
574 if (ev_cq != rd->cq) {
575 log_err("fio: Unknown CQ!\n");
576 return -1;
577 }
578 if (ibv_req_notify_cq(rd->cq, 0) != 0) {
579 log_err("fio: Failed to set notify!\n");
580 return -1;
581 }
582
583 ret = cq_event_handler(td, comp_opcode);
584 if (ret < 1)
585 goto again;
586
587 ibv_ack_cq_events(rd->cq, ret);
588
589 r += ret;
590 if (r < min)
591 goto again;
592
593 rd->cq_event_num -= r;
594
595 return r;
596}
597
598static int fio_rdmaio_send(struct thread_data *td, struct io_u **io_us,
599 unsigned int nr)
600{
601 struct rdmaio_data *rd = td->io_ops->data;
602 struct ibv_send_wr *bad_wr;
e07f72d3 603#if 0
21b8aee8 604 enum ibv_wc_opcode comp_opcode;
605 comp_opcode = IBV_WC_RDMA_WRITE;
e07f72d3 606#endif
7d7803fa
YR		 607 int i;
608 long index;
21b8aee8 609 struct rdma_io_u_data *r_io_u_d;
610
611 r_io_u_d = NULL;
612
613 for (i = 0; i < nr; i++) {
614 /* RDMA_WRITE or RDMA_READ */
615 switch (rd->rdma_protocol) {
616 case FIO_RDMA_MEM_WRITE:
617 /* compose work request */
618 r_io_u_d = io_us[i]->engine_data;
7d7803fa
YR		 619 if (td->o.use_os_rand)
620 index = os_random_long(&td->random_state) % rd->rmt_nr;
621 else
ea6209ad 622 index = __rand(&rd->rand_state) % rd->rmt_nr;
21b8aee8 623 r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_WRITE;
624 r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
b6cf38f0
YR		 625 r_io_u_d->sq_wr.wr.rdma.remote_addr = \
626 rd->rmt_us[index].buf;
21b8aee8 627 r_io_u_d->sq_wr.sg_list->length = io_us[i]->buflen;
628 break;
629 case FIO_RDMA_MEM_READ:
630 /* compose work request */
631 r_io_u_d = io_us[i]->engine_data;
7d7803fa
YR		 632 if (td->o.use_os_rand)
633 index = os_random_long(&td->random_state) % rd->rmt_nr;
634 else
ea6209ad 635 index = __rand(&rd->rand_state) % rd->rmt_nr;
21b8aee8 636 r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_READ;
637 r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
b6cf38f0
YR		 638 r_io_u_d->sq_wr.wr.rdma.remote_addr = \
639 rd->rmt_us[index].buf;
21b8aee8 640 r_io_u_d->sq_wr.sg_list->length = io_us[i]->buflen;
641 break;
642 case FIO_RDMA_CHA_SEND:
643 r_io_u_d = io_us[i]->engine_data;
644 r_io_u_d->sq_wr.opcode = IBV_WR_SEND;
645 r_io_u_d->sq_wr.send_flags = IBV_SEND_SIGNALED;
646 break;
647 default:
648 log_err("fio: unknown rdma protocol - %d\n",
649 rd->rdma_protocol);
650 break;
651 }
652
653 if (ibv_post_send(rd->qp, &r_io_u_d->sq_wr, &bad_wr) != 0) {
654 log_err("fio: ibv_post_send fail\n");
655 return -1;
656 }
657
658 dprint_io_u(io_us[i], "fio_rdmaio_send");
659 }
660
661 /* wait for completion
662 rdma_poll_wait(td, comp_opcode); */
663
664 return i;
665}
666
667static int fio_rdmaio_recv(struct thread_data *td, struct io_u **io_us,
668 unsigned int nr)
669{
670 struct rdmaio_data *rd = td->io_ops->data;
671 struct ibv_recv_wr *bad_wr;
672 struct rdma_io_u_data *r_io_u_d;
673 int i;
674
675 i = 0;
676 if (rd->rdma_protocol == FIO_RDMA_CHA_RECV) {
677 /* post io_u into recv queue */
678 for (i = 0; i < nr; i++) {
679 r_io_u_d = io_us[i]->engine_data;
680 if (ibv_post_recv(rd->qp, &r_io_u_d->rq_wr, &bad_wr) !=
681 0) {
682 log_err("fio: ibv_post_recv fail\n");
683 return 1;
684 }
685 }
686 } else if ((rd->rdma_protocol == FIO_RDMA_MEM_READ)
687 || (rd->rdma_protocol == FIO_RDMA_MEM_WRITE)) {
688 /* re-post the rq_wr */
689 if (ibv_post_recv(rd->qp, &rd->rq_wr, &bad_wr) != 0) {
690 log_err("fio: ibv_post_recv fail\n");
691 return 1;
692 }
693
694 rdma_poll_wait(td, IBV_WC_RECV);
695
696 dprint(FD_IO, "fio: recv FINISH message\n");
a05d62b2
YR		 697 td->done = 1;
698 return 0;
21b8aee8 699 }
700
701 return i;
702}
703
704static int fio_rdmaio_queue(struct thread_data *td, struct io_u *io_u)
705{
706 struct rdmaio_data *rd = td->io_ops->data;
707
708 fio_ro_check(td, io_u);
709
710 if (rd->io_u_queued_nr == (int)td->o.iodepth)
711 return FIO_Q_BUSY;
712
713 rd->io_us_queued[rd->io_u_queued_nr] = io_u;
714 rd->io_u_queued_nr++;
715
716 dprint_io_u(io_u, "fio_rdmaio_queue");
717
718 return FIO_Q_QUEUED;
719}
720
721static void fio_rdmaio_queued(struct thread_data *td, struct io_u **io_us,
722 unsigned int nr)
723{
724 struct rdmaio_data *rd = td->io_ops->data;
725 struct timeval now;
726 unsigned int i;
727
728 if (!fio_fill_issue_time(td))
729 return;
730
731 fio_gettime(&now, NULL);
732
733 for (i = 0; i < nr; i++) {
734 struct io_u *io_u = io_us[i];
735
736 /* queued -> flight */
737 rd->io_us_flight[rd->io_u_flight_nr] = io_u;
738 rd->io_u_flight_nr++;
739
740 memcpy(&io_u->issue_time, &now, sizeof(now));
741 io_u_queued(td, io_u);
742 }
743}
744
745static int fio_rdmaio_commit(struct thread_data *td)
746{
747 struct rdmaio_data *rd = td->io_ops->data;
748 struct io_u **io_us;
749 int ret;
750
751 if (!rd->io_us_queued)
752 return 0;
753
754 io_us = rd->io_us_queued;
755 do {
756 /* RDMA_WRITE or RDMA_READ */
757 if (rd->is_client) {
758 ret = fio_rdmaio_send(td, io_us, rd->io_u_queued_nr);
759 } else if (!rd->is_client) {
760 ret = fio_rdmaio_recv(td, io_us, rd->io_u_queued_nr);
761 } else
762 ret = 0; /* must be a SYNC */
763
764 if (ret > 0) {
765 fio_rdmaio_queued(td, io_us, ret);
766 io_u_mark_submit(td, ret);
767 rd->io_u_queued_nr -= ret;
768 io_us += ret;
769 ret = 0;
770 } else
771 break;
772 } while (rd->io_u_queued_nr);
773
774 return ret;
775}
776
777static int fio_rdmaio_connect(struct thread_data *td, struct fio_file *f)
778{
779 struct rdmaio_data *rd = td->io_ops->data;
780 struct rdma_conn_param conn_param;
781 struct ibv_send_wr *bad_wr;
782
783 memset(&conn_param, 0, sizeof conn_param);
784 conn_param.responder_resources = 1;
785 conn_param.initiator_depth = 1;
786 conn_param.retry_count = 10;
787
788 if (rdma_connect(rd->cm_id, &conn_param) != 0) {
789 log_err("fio: rdma_connect fail\n");
790 return 1;
791 }
792
793 if (get_next_channel_event
794 (td, rd->cm_channel, RDMA_CM_EVENT_ESTABLISHED) != 0) {
795 log_err("fio: wait for RDMA_CM_EVENT_ESTABLISHED\n");
796 return 1;
797 }
798
799 /* send task request */
800 rd->send_buf.mode = htonl(rd->rdma_protocol);
801 rd->send_buf.nr = htonl(td->o.iodepth);
802
803 if (ibv_post_send(rd->qp, &rd->sq_wr, &bad_wr) != 0) {
804 log_err("fio: ibv_post_send fail");
805 return 1;
806 }
807
808 rdma_poll_wait(td, IBV_WC_SEND);
809
810 /* wait for remote MR info from server side */
811 rdma_poll_wait(td, IBV_WC_RECV);
812
7d7803fa
YR		 813 /* In SEND/RECV test, it's a good practice to setup the iodepth of
814 * of the RECV side deeper than that of the SEND side to
815 * avoid RNR (receiver not ready) error. The
816 * SEND side may send so many unsolicited message before
817 * RECV side commits sufficient recv buffers into recv queue.
818 * This may lead to RNR error. Here, SEND side pauses for a while
819 * during which RECV side commits sufficient recv buffers.
820 */
821 usleep(500000);
822
21b8aee8 823 return 0;
824}
825
826static int fio_rdmaio_accept(struct thread_data *td, struct fio_file *f)
827{
828 struct rdmaio_data *rd = td->io_ops->data;
829 struct rdma_conn_param conn_param;
830 struct ibv_send_wr *bad_wr;
831
832 /* rdma_accept() - then wait for accept success */
833 memset(&conn_param, 0, sizeof conn_param);
834 conn_param.responder_resources = 1;
835 conn_param.initiator_depth = 1;
836
837 if (rdma_accept(rd->child_cm_id, &conn_param) != 0) {
838 log_err("fio: rdma_accept\n");
839 return 1;
840 }
841
842 if (get_next_channel_event
843 (td, rd->cm_channel, RDMA_CM_EVENT_ESTABLISHED) != 0) {
844 log_err("fio: wait for RDMA_CM_EVENT_ESTABLISHED\n");
845 return 1;
846 }
847
848 /* wait for request */
849 rdma_poll_wait(td, IBV_WC_RECV);
850
851 if (ibv_post_send(rd->qp, &rd->sq_wr, &bad_wr) != 0) {
852 log_err("fio: ibv_post_send fail");
853 return 1;
854 }
855
856 rdma_poll_wait(td, IBV_WC_SEND);
857
858 return 0;
859}
860
861static int fio_rdmaio_open_file(struct thread_data *td, struct fio_file *f)
862{
863 if (td_read(td))
864 return fio_rdmaio_accept(td, f);
865 else
866 return fio_rdmaio_connect(td, f);
867}
868
869static int fio_rdmaio_close_file(struct thread_data *td, struct fio_file *f)
870{
871 struct rdmaio_data *rd = td->io_ops->data;
872 struct ibv_send_wr *bad_wr;
873
874 /* unregister rdma buffer */
875
876 /*
877 * Client sends notification to the server side
878 */
879 /* refer to: http://linux.die.net/man/7/rdma_cm */
880 if ((rd->is_client == 1) && ((rd->rdma_protocol == FIO_RDMA_MEM_WRITE)
881 || (rd->rdma_protocol ==
882 FIO_RDMA_MEM_READ))) {
883 if (ibv_post_send(rd->qp, &rd->sq_wr, &bad_wr) != 0) {
884 log_err("fio: ibv_post_send fail");
885 return 1;
886 }
887
888 dprint(FD_IO, "fio: close infomation sent success\n");
889 rdma_poll_wait(td, IBV_WC_SEND);
890 }
891
892 if (rd->is_client == 1)
893 rdma_disconnect(rd->cm_id);
894 else {
895 rdma_disconnect(rd->child_cm_id);
896/* rdma_disconnect(rd->cm_id); */
897 }
898
899/* if (get_next_channel_event(td, rd->cm_channel, RDMA_CM_EVENT_DISCONNECTED) != 0)
900 {
901 log_err("fio: wait for RDMA_CM_EVENT_DISCONNECTED\n");
902 return 1;
903 }*/
904
21b8aee8 905 ibv_destroy_cq(rd->cq);
7d7803fa 906 ibv_destroy_qp(rd->qp);
21b8aee8 907
908 if (rd->is_client == 1)
909 rdma_destroy_id(rd->cm_id);
910 else {
911 rdma_destroy_id(rd->child_cm_id);
912 rdma_destroy_id(rd->cm_id);
913 }
914
915 ibv_destroy_comp_channel(rd->channel);
916 ibv_dealloc_pd(rd->pd);
917
918 return 0;
919}
920
921static int fio_rdmaio_setup_connect(struct thread_data *td, const char *host,
922 unsigned short port)
923{
924 struct rdmaio_data *rd = td->io_ops->data;
925 struct ibv_recv_wr *bad_wr;
926
927 rd->addr.sin_family = AF_INET;
928 rd->addr.sin_port = htons(port);
929
930 if (inet_aton(host, &rd->addr.sin_addr) != 1) {
931 struct hostent *hent;
932
933 hent = gethostbyname(host);
934 if (!hent) {
935 td_verror(td, errno, "gethostbyname");
936 return 1;
937 }
938
939 memcpy(&rd->addr.sin_addr, hent->h_addr, 4);
940 }
941
942 /* resolve route */
943 if (rdma_resolve_addr(rd->cm_id, NULL,
944 (struct sockaddr *)&rd->addr, 2000) != 0) {
945 log_err("fio: rdma_resolve_addr");
946 return 1;
947 }
948
949 if (get_next_channel_event
950 (td, rd->cm_channel, RDMA_CM_EVENT_ADDR_RESOLVED)
951 != 0) {
952 log_err("fio: get_next_channel_event");
953 return 1;
954 }
955
956 /* resolve route */
957 if (rdma_resolve_route(rd->cm_id, 2000) != 0) {
958 log_err("fio: rdma_resolve_route");
959 return 1;
960 }
961
962 if (get_next_channel_event
963 (td, rd->cm_channel, RDMA_CM_EVENT_ROUTE_RESOLVED) != 0) {
964 log_err("fio: get_next_channel_event");
965 return 1;
966 }
967
968 /* create qp and buffer */
969 if (fio_rdmaio_setup_qp(td) != 0)
970 return 1;
971
972 if (fio_rdmaio_setup_control_msg_buffers(td) != 0)
973 return 1;
974
975 /* post recv buf */
976 if (ibv_post_recv(rd->qp, &rd->rq_wr, &bad_wr) != 0) {
977 log_err("fio: ibv_post_recv fail\n");
978 return 1;
979 }
980
981 return 0;
982}
983
984static int fio_rdmaio_setup_listen(struct thread_data *td, short port)
985{
986 struct rdmaio_data *rd = td->io_ops->data;
987 struct ibv_recv_wr *bad_wr;
988
989 rd->addr.sin_family = AF_INET;
990 rd->addr.sin_addr.s_addr = htonl(INADDR_ANY);
991 rd->addr.sin_port = htons(port);
992
993 /* rdma_listen */
994 if (rdma_bind_addr(rd->cm_id, (struct sockaddr *)&rd->addr) != 0) {
995 log_err("fio: rdma_bind_addr fail\n");
996 return 1;
997 }
998
999 if (rdma_listen(rd->cm_id, 3) != 0) {
1000 log_err("fio: rdma_listen fail\n");
1001 return 1;
1002 }
1003
1004 /* wait for CONNECT_REQUEST */
1005 if (get_next_channel_event
1006 (td, rd->cm_channel, RDMA_CM_EVENT_CONNECT_REQUEST) != 0) {
1007 log_err("fio: wait for RDMA_CM_EVENT_CONNECT_REQUEST\n");
1008 return 1;
1009 }
1010
1011 if (fio_rdmaio_setup_qp(td) != 0)
1012 return 1;
1013
1014 if (fio_rdmaio_setup_control_msg_buffers(td) != 0)
1015 return 1;
1016
1017 /* post recv buf */
1018 if (ibv_post_recv(rd->qp, &rd->rq_wr, &bad_wr) != 0) {
1019 log_err("fio: ibv_post_recv fail\n");
1020 return 1;
1021 }
1022
1023 return 0;
1024}
1025
1026static int fio_rdmaio_init(struct thread_data *td)
1027{
1028 struct rdmaio_data *rd = td->io_ops->data;
1029 unsigned int port;
1030 char host[64], buf[128];
1031 char *sep, *portp, *modep;
1032 int ret;
1033 struct rlimit rl;
1034
1035 if (td_rw(td)) {
1036 log_err("fio: rdma connections must be read OR write\n");
1037 return 1;
1038 }
1039 if (td_random(td)) {
1040 log_err("fio: RDMA network IO can't be random\n");
1041 return 1;
1042 }
1043
1044 /* check RLIMIT_MEMLOCK */
1045 if (getrlimit(RLIMIT_MEMLOCK, &rl) != 0) {
1046 log_err("fio: getrlimit fail: %d(%s)\n",
1047 errno, strerror(errno));
1048 return 1;
1049 }
1050
1051 /* soft limit */
1052 if ((rl.rlim_cur != RLIM_INFINITY)
1053 && (rl.rlim_cur < td->orig_buffer_size)) {
e07f72d3
BVA		 1054 log_err("fio: soft RLIMIT_MEMLOCK is: %" PRId64 "\n",
1055 rl.rlim_cur);
1056 log_err("fio: total block size is: %zd\n",
21b8aee8 1057 td->orig_buffer_size);
1058 /* try to set larger RLIMIT_MEMLOCK */
1059 rl.rlim_cur = rl.rlim_max;
1060 if (setrlimit(RLIMIT_MEMLOCK, &rl) != 0) {
1061 log_err("fio: setrlimit fail: %d(%s)\n",
1062 errno, strerror(errno));
1063 log_err("fio: you may try enlarge MEMLOCK by root\n");
1064 log_err("# ulimit -l unlimited\n");
1065 return 1;
1066 }
1067 }
1068
1069 strcpy(buf, td->o.filename);
1070
1071 sep = strchr(buf, '/');
1072 if (!sep)
1073 goto bad_host;
1074
1075 *sep = '\0';
1076 sep++;
1077 strcpy(host, buf);
1078 if (!strlen(host))
1079 goto bad_host;
1080
1081 modep = NULL;
1082 portp = sep;
1083 sep = strchr(portp, '/');
1084 if (sep) {
1085 *sep = '\0';
1086 modep = sep + 1;
1087 }
1088
1089 port = strtol(portp, NULL, 10);
1090 if (!port || port > 65535)
1091 goto bad_host;
1092
1093 if (modep) {
1094 if (!strncmp("rdma_write", modep, strlen(modep)) ||
1095 !strncmp("RDMA_WRITE", modep, strlen(modep)))
1096 rd->rdma_protocol = FIO_RDMA_MEM_WRITE;
1097 else if (!strncmp("rdma_read", modep, strlen(modep)) ||
1098 !strncmp("RDMA_READ", modep, strlen(modep)))
1099 rd->rdma_protocol = FIO_RDMA_MEM_READ;
1100 else if (!strncmp("send", modep, strlen(modep)) ||
1101 !strncmp("SEND", modep, strlen(modep)))
1102 rd->rdma_protocol = FIO_RDMA_CHA_SEND;
1103 else
1104 goto bad_host;
1105 } else
1106 rd->rdma_protocol = FIO_RDMA_MEM_WRITE;
1107
1108 rd->cq_event_num = 0;
1109
1110 rd->cm_channel = rdma_create_event_channel();
1111 if (!rd->cm_channel) {
1112 log_err("fio: rdma_create_event_channel fail\n");
1113 return 1;
1114 }
1115
1116 ret = rdma_create_id(rd->cm_channel, &rd->cm_id, rd, RDMA_PS_TCP);
1117 if (ret) {
1118 log_err("fio: rdma_create_id fail\n");
1119 return 1;
1120 }
1121
1122 if ((rd->rdma_protocol == FIO_RDMA_MEM_WRITE) ||
1123 (rd->rdma_protocol == FIO_RDMA_MEM_READ)) {
1124 rd->rmt_us =
76cc5224 1125 malloc(FIO_RDMA_MAX_IO_DEPTH * sizeof(struct remote_u));
21b8aee8 1126 memset(rd->rmt_us, 0,
76cc5224 1127 FIO_RDMA_MAX_IO_DEPTH * sizeof(struct remote_u));
21b8aee8 1128 rd->rmt_nr = 0;
1129 }
1130
1131 rd->io_us_queued = malloc(td->o.iodepth * sizeof(struct io_u *));
1132 memset(rd->io_us_queued, 0, td->o.iodepth * sizeof(struct io_u *));
1133 rd->io_u_queued_nr = 0;
1134
1135 rd->io_us_flight = malloc(td->o.iodepth * sizeof(struct io_u *));
1136 memset(rd->io_us_flight, 0, td->o.iodepth * sizeof(struct io_u *));
1137 rd->io_u_flight_nr = 0;
1138
1139 rd->io_us_completed = malloc(td->o.iodepth * sizeof(struct io_u *));
1140 memset(rd->io_us_completed, 0, td->o.iodepth * sizeof(struct io_u *));
1141 rd->io_u_completed_nr = 0;
1142
1143 if (td_read(td)) { /* READ as the server */
1144 rd->is_client = 0;
1145 /* server rd->rdma_buf_len will be setup after got request */
1146 ret = fio_rdmaio_setup_listen(td, port);
1147 } else { /* WRITE as the client */
1148 rd->is_client = 1;
1149 ret = fio_rdmaio_setup_connect(td, host, port);
1150 }
1151
1152 struct flist_head *entry;
1153 unsigned int max_bs;
1154 max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
1155 /* register each io_u in the free list */
1156 int i = 0;
1157 flist_for_each(entry, &td->io_u_freelist) {
1158 struct io_u *io_u = flist_entry(entry, struct io_u, list);
1159
1160 io_u->engine_data = malloc(sizeof(struct rdma_io_u_data));
1161 memset(io_u->engine_data, 0, sizeof(struct rdma_io_u_data));
1162 ((struct rdma_io_u_data *)io_u->engine_data)->wr_id = i;
1163
1164 io_u->mr = ibv_reg_mr(rd->pd, io_u->buf, max_bs,
1165 IBV_ACCESS_LOCAL_WRITE |
1166 IBV_ACCESS_REMOTE_READ |
1167 IBV_ACCESS_REMOTE_WRITE);
1168 if (io_u->mr == NULL) {
1169 log_err("fio: ibv_reg_mr io_u failed\n");
1170 return 1;
1171 }
1172
1173 rd->send_buf.rmt_us[i].buf =
1174 htonll((uint64_t) (unsigned long)io_u->buf);
1175 rd->send_buf.rmt_us[i].rkey = htonl(io_u->mr->rkey);
1176 rd->send_buf.rmt_us[i].size = htonl(max_bs);
1177
1178/* log_info("fio: Send rkey %x addr %" PRIx64 " len %d to client\n",
1179 io_u->mr->rkey, io_u->buf, max_bs); */
1180 i++;
1181 }
1182
1183 rd->send_buf.nr = htonl(i);
1184
1185 return ret;
1186bad_host:
1187 log_err("fio: bad rdma host/port/protocol: %s\n", td->o.filename);
1188 return 1;
1189}
1190
1191static void fio_rdmaio_cleanup(struct thread_data *td)
1192{
1193 struct rdmaio_data *rd = td->io_ops->data;
1194
1195 if (rd) {
1196/* if (nd->listenfd != -1)
1197 close(nd->listenfd);
1198 if (nd->pipes[0] != -1)
1199 close(nd->pipes[0]);
1200 if (nd->pipes[1] != -1)
1201 close(nd->pipes[1]);
1202*/
1203 free(rd);
1204 }
1205}
1206
1207static int fio_rdmaio_setup(struct thread_data *td)
1208{
1209 struct rdmaio_data *rd;
1210
1211 if (!td->io_ops->data) {
1212 rd = malloc(sizeof(*rd));;
1213
1214 memset(rd, 0, sizeof(*rd));
ea6209ad 1215 init_rand_seed(&rd->rand_state, GOLDEN_RATIO_PRIME);
21b8aee8 1216 td->io_ops->data = rd;
1217 }
1218
1219 return 0;
1220}
1221
1222static struct ioengine_ops ioengine_rw = {
b6cf38f0
YR		 1223 .name = "rdma",
1224 .version = FIO_IOOPS_VERSION,
1225 .setup = fio_rdmaio_setup,
1226 .init = fio_rdmaio_init,
1227 .prep = fio_rdmaio_prep,
1228 .queue = fio_rdmaio_queue,
1229 .commit = fio_rdmaio_commit,
1230 .getevents = fio_rdmaio_getevents,
1231 .event = fio_rdmaio_event,
1232 .cleanup = fio_rdmaio_cleanup,
1233 .open_file = fio_rdmaio_open_file,
1234 .close_file = fio_rdmaio_close_file,
1235 .flags = FIO_DISKLESSIO | FIO_UNIDIR | FIO_PIPEIO,
21b8aee8 1236};
1237
1238#else /* FIO_HAVE_RDMA */
1239
1240static int fio_rdmaio_open_file(struct thread_data *td, struct fio_file *f)
1241{
1242 return 0;
1243}
1244
1245static int fio_rdmaio_close_file(struct thread_data *td, struct fio_file *f)
1246{
1247 return 0;
1248}
1249
1250static int fio_rdmaio_queue(struct thread_data *td, struct io_u *io_u)
1251{
1252 return FIO_Q_COMPLETED;
1253}
1254
1255static int fio_rdmaio_init(struct thread_data fio_unused * td)
1256{
1257 log_err("fio: rdma(librdmacm libibverbs) not available\n");
1258 log_err(" You haven't compiled rdma ioengine into fio.\n");
1259 log_err(" If you want to try rdma ioengine,\n");
1260 log_err(" make sure OFED is installed,\n");
1261 log_err(" $ ofed_info\n");
1262 log_err(" then try to make fio as follows:\n");
7d7803fa
YR		 1263 log_err(" $ export EXTFLAGS+=\" -DFIO_HAVE_RDMA \"\n");
1264 log_err(" $ export EXTLIBS+=\" -libverbs -lrdmacm \"\n");
21b8aee8 1265 log_err(" $ make clean && make\n");
1266 return 1;
1267}
1268
1269static struct ioengine_ops ioengine_rw = {
b6cf38f0
YR		 1270 .name = "rdma",
1271 .version = FIO_IOOPS_VERSION,
1272 .init = fio_rdmaio_init,
1273 .queue = fio_rdmaio_queue,
1274 .open_file = fio_rdmaio_open_file,
1275 .close_file = fio_rdmaio_close_file,
1276 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR | FIO_PIPEIO,
21b8aee8 1277};
1278
1279#endif
1280
1281static void fio_init fio_rdmaio_register(void)
1282{
1283 register_ioengine(&ioengine_rw);
1284}
1285
1286static void fio_exit fio_rdmaio_unregister(void)
1287{
1288 unregister_ioengine(&ioengine_rw);
1289}
fio - Flexible IO Tester