1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25 /*
26 * Copyright (c) 2005 SilverStorm Technologies, Inc. All rights reserved.
27 *
28 * This software is available to you under a choice of one of two
29 * licenses. You may choose to be licensed under the terms of the GNU
30 * General Public License (GPL) Version 2, available from the file
31 * COPYING in the main directory of this source tree, or the
32 * OpenIB.org BSD license below:
33 *
34 * Redistribution and use in source and binary forms, with or
35 * without modification, are permitted provided that the following
36 * conditions are met:
37 *
38 * - Redistributions of source code must retain the above
39 * copyright notice, this list of conditions and the following
40 * disclaimer.
41 *
42 * - Redistributions in binary form must reproduce the above
43 * copyright notice, this list of conditions and the following
44 * disclaimer in the documentation and/or other materials
45 * provided with the distribution.
46 *
47 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
48 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
49 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
50 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
51 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
52 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
53 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
54 * SOFTWARE.
55 *
56 */
57 /*
58 * Sun elects to include this software in Sun product
59 * under the OpenIB BSD license.
60 *
61 *
62 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
63 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
65 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
66 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
67 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
68 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
69 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
70 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
71 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
72 * POSSIBILITY OF SUCH DAMAGE.
73 */
74
75 #include <sys/stream.h>
76 #include <sys/ib/clients/rds/rdsib_cm.h>
77 #include <sys/ib/clients/rds/rdsib_ib.h>
78 #include <sys/ib/clients/rds/rdsib_buf.h>
79 #include <sys/ib/clients/rds/rdsib_ep.h>
80 #include <sys/ib/clients/rds/rds_kstat.h>
81 #include <sys/zone.h>
82
83 #define RDS_POLL_CQ_IN_2TICKS 1
84
85 /*
86 * This File contains the endpoint related calls
87 */
88
89 extern boolean_t rds_islocal(ipaddr_t addr);
90 extern uint_t rds_wc_signal;
91
92 #define RDS_LOOPBACK 0
93 #define RDS_LOCAL 1
94 #define RDS_REMOTE 2
95
96 #define IBT_IPADDR 1
97
98 static uint8_t
rds_is_port_marked(rds_session_t * sp,in_port_t port,uint_t qualifier)99 rds_is_port_marked(rds_session_t *sp, in_port_t port, uint_t qualifier)
100 {
101 uint8_t ret;
102
103 switch (qualifier) {
104 case RDS_LOOPBACK: /* loopback */
105 rw_enter(&rds_loopback_portmap_lock, RW_READER);
106 ret = (rds_loopback_portmap[port/8] & (1 << (port % 8)));
107 rw_exit(&rds_loopback_portmap_lock);
108 break;
109
110 case RDS_LOCAL: /* Session local */
111 ASSERT(sp != NULL);
112 rw_enter(&sp->session_local_portmap_lock, RW_READER);
113 ret = (sp->session_local_portmap[port/8] & (1 << (port % 8)));
114 rw_exit(&sp->session_local_portmap_lock);
115 break;
116
117 case RDS_REMOTE: /* Session remote */
118 ASSERT(sp != NULL);
119 rw_enter(&sp->session_remote_portmap_lock, RW_READER);
120 ret = (sp->session_remote_portmap[port/8] & (1 << (port % 8)));
121 rw_exit(&sp->session_remote_portmap_lock);
122 break;
123 }
124
125 return (ret);
126 }
127
128 static uint8_t
rds_check_n_mark_port(rds_session_t * sp,in_port_t port,uint_t qualifier)129 rds_check_n_mark_port(rds_session_t *sp, in_port_t port, uint_t qualifier)
130 {
131 uint8_t ret;
132
133 switch (qualifier) {
134 case RDS_LOOPBACK: /* loopback */
135 rw_enter(&rds_loopback_portmap_lock, RW_WRITER);
136 ret = (rds_loopback_portmap[port/8] & (1 << (port % 8)));
137 if (!ret) {
138 /* port is not marked, mark it */
139 rds_loopback_portmap[port/8] =
140 rds_loopback_portmap[port/8] | (1 << (port % 8));
141 }
142 rw_exit(&rds_loopback_portmap_lock);
143 break;
144
145 case RDS_LOCAL: /* Session local */
146 ASSERT(sp != NULL);
147 rw_enter(&sp->session_local_portmap_lock, RW_WRITER);
148 ret = (sp->session_local_portmap[port/8] & (1 << (port % 8)));
149 if (!ret) {
150 /* port is not marked, mark it */
151 sp->session_local_portmap[port/8] =
152 sp->session_local_portmap[port/8] |
153 (1 << (port % 8));
154 }
155 rw_exit(&sp->session_local_portmap_lock);
156 break;
157
158 case RDS_REMOTE: /* Session remote */
159 ASSERT(sp != NULL);
160 rw_enter(&sp->session_remote_portmap_lock, RW_WRITER);
161 ret = (sp->session_remote_portmap[port/8] & (1 << (port % 8)));
162 if (!ret) {
163 /* port is not marked, mark it */
164 sp->session_remote_portmap[port/8] =
165 sp->session_remote_portmap[port/8] |
166 (1 << (port % 8));
167 }
168 rw_exit(&sp->session_remote_portmap_lock);
169 break;
170 }
171
172 return (ret);
173 }
174
175 static uint8_t
rds_check_n_unmark_port(rds_session_t * sp,in_port_t port,uint_t qualifier)176 rds_check_n_unmark_port(rds_session_t *sp, in_port_t port, uint_t qualifier)
177 {
178 uint8_t ret;
179
180 switch (qualifier) {
181 case RDS_LOOPBACK: /* loopback */
182 rw_enter(&rds_loopback_portmap_lock, RW_WRITER);
183 ret = (rds_loopback_portmap[port/8] & (1 << (port % 8)));
184 if (ret) {
185 /* port is marked, unmark it */
186 rds_loopback_portmap[port/8] =
187 rds_loopback_portmap[port/8] & ~(1 << (port % 8));
188 }
189 rw_exit(&rds_loopback_portmap_lock);
190 break;
191
192 case RDS_LOCAL: /* Session local */
193 ASSERT(sp != NULL);
194 rw_enter(&sp->session_local_portmap_lock, RW_WRITER);
195 ret = (sp->session_local_portmap[port/8] & (1 << (port % 8)));
196 if (ret) {
197 /* port is marked, unmark it */
198 sp->session_local_portmap[port/8] =
199 sp->session_local_portmap[port/8] &
200 ~(1 << (port % 8));
201 }
202 rw_exit(&sp->session_local_portmap_lock);
203 break;
204
205 case RDS_REMOTE: /* Session remote */
206 ASSERT(sp != NULL);
207 rw_enter(&sp->session_remote_portmap_lock, RW_WRITER);
208 ret = (sp->session_remote_portmap[port/8] & (1 << (port % 8)));
209 if (ret) {
210 /* port is marked, unmark it */
211 sp->session_remote_portmap[port/8] =
212 sp->session_remote_portmap[port/8] &
213 ~(1 << (port % 8));
214 }
215 rw_exit(&sp->session_remote_portmap_lock);
216 break;
217 }
218
219 return (ret);
220 }
221
222 static void
rds_mark_all_ports(rds_session_t * sp,uint_t qualifier)223 rds_mark_all_ports(rds_session_t *sp, uint_t qualifier)
224 {
225 switch (qualifier) {
226 case RDS_LOOPBACK: /* loopback */
227 rw_enter(&rds_loopback_portmap_lock, RW_WRITER);
228 (void) memset(rds_loopback_portmap, 0xFF, RDS_PORT_MAP_SIZE);
229 rw_exit(&rds_loopback_portmap_lock);
230 break;
231
232 case RDS_LOCAL: /* Session local */
233 ASSERT(sp != NULL);
234 rw_enter(&sp->session_local_portmap_lock, RW_WRITER);
235 (void) memset(sp->session_local_portmap, 0xFF,
236 RDS_PORT_MAP_SIZE);
237 rw_exit(&sp->session_local_portmap_lock);
238 break;
239
240 case RDS_REMOTE: /* Session remote */
241 ASSERT(sp != NULL);
242 rw_enter(&sp->session_remote_portmap_lock, RW_WRITER);
243 (void) memset(sp->session_remote_portmap, 0xFF,
244 RDS_PORT_MAP_SIZE);
245 rw_exit(&sp->session_remote_portmap_lock);
246 break;
247 }
248 }
249
250 static void
rds_unmark_all_ports(rds_session_t * sp,uint_t qualifier)251 rds_unmark_all_ports(rds_session_t *sp, uint_t qualifier)
252 {
253 switch (qualifier) {
254 case RDS_LOOPBACK: /* loopback */
255 rw_enter(&rds_loopback_portmap_lock, RW_WRITER);
256 bzero(rds_loopback_portmap, RDS_PORT_MAP_SIZE);
257 rw_exit(&rds_loopback_portmap_lock);
258 break;
259
260 case RDS_LOCAL: /* Session local */
261 ASSERT(sp != NULL);
262 rw_enter(&sp->session_local_portmap_lock, RW_WRITER);
263 bzero(sp->session_local_portmap, RDS_PORT_MAP_SIZE);
264 rw_exit(&sp->session_local_portmap_lock);
265 break;
266
267 case RDS_REMOTE: /* Session remote */
268 ASSERT(sp != NULL);
269 rw_enter(&sp->session_remote_portmap_lock, RW_WRITER);
270 bzero(sp->session_remote_portmap, RDS_PORT_MAP_SIZE);
271 rw_exit(&sp->session_remote_portmap_lock);
272 break;
273 }
274 }
275
276 static boolean_t
rds_add_session(rds_session_t * sp,boolean_t locked)277 rds_add_session(rds_session_t *sp, boolean_t locked)
278 {
279 boolean_t retval = B_TRUE;
280
281 RDS_DPRINTF2("rds_add_session", "Enter: SP(%p)", sp);
282
283 if (!locked) {
284 rw_enter(&rdsib_statep->rds_sessionlock, RW_WRITER);
285 }
286
287 /* Don't allow more sessions than configured in rdsib.conf */
288 if (rdsib_statep->rds_nsessions >= (MaxNodes - 1)) {
289 RDS_DPRINTF1("rds_add_session", "Max session limit reached");
290 retval = B_FALSE;
291 } else {
292 sp->session_nextp = rdsib_statep->rds_sessionlistp;
293 rdsib_statep->rds_sessionlistp = sp;
294 rdsib_statep->rds_nsessions++;
295 RDS_INCR_SESS();
296 }
297
298 if (!locked) {
299 rw_exit(&rdsib_statep->rds_sessionlock);
300 }
301
302 RDS_DPRINTF2("rds_add_session", "Return: SP(%p)", sp);
303
304 return (retval);
305 }
306
307 /* Session lookup based on destination IP or destination node guid */
308 rds_session_t *
rds_session_lkup(rds_state_t * statep,ipaddr_t remoteip,ib_guid_t node_guid)309 rds_session_lkup(rds_state_t *statep, ipaddr_t remoteip, ib_guid_t node_guid)
310 {
311 rds_session_t *sp;
312
313 RDS_DPRINTF4("rds_session_lkup", "Enter: 0x%p 0x%x 0x%llx", statep,
314 remoteip, node_guid);
315
316 /* A read/write lock is expected, will panic if none of them are held */
317 ASSERT(rw_lock_held(&statep->rds_sessionlock));
318 sp = statep->rds_sessionlistp;
319 while (sp) {
320 if ((sp->session_remip == remoteip) || ((node_guid != 0) &&
321 (sp->session_rgid.gid_guid == node_guid))) {
322 break;
323 }
324
325 sp = sp->session_nextp;
326 }
327
328 RDS_DPRINTF4("rds_session_lkup", "Return: SP(%p)", sp);
329
330 return (sp);
331 }
332
333 boolean_t
rds_session_lkup_by_sp(rds_session_t * sp)334 rds_session_lkup_by_sp(rds_session_t *sp)
335 {
336 rds_session_t *sessionp;
337
338 RDS_DPRINTF4("rds_session_lkup_by_sp", "Enter: 0x%p", sp);
339
340 rw_enter(&rdsib_statep->rds_sessionlock, RW_READER);
341 sessionp = rdsib_statep->rds_sessionlistp;
342 while (sessionp) {
343 if (sessionp == sp) {
344 rw_exit(&rdsib_statep->rds_sessionlock);
345 return (B_TRUE);
346 }
347
348 sessionp = sessionp->session_nextp;
349 }
350 rw_exit(&rdsib_statep->rds_sessionlock);
351
352 return (B_FALSE);
353 }
354
355 static void
rds_ep_fini(rds_ep_t * ep)356 rds_ep_fini(rds_ep_t *ep)
357 {
358 RDS_DPRINTF3("rds_ep_fini", "Enter: EP(%p) type: %d", ep, ep->ep_type);
359
360 /* free send pool */
361 rds_free_send_pool(ep);
362
363 /* free recv pool */
364 rds_free_recv_pool(ep);
365
366 mutex_enter(&ep->ep_lock);
367 ep->ep_hca_guid = 0;
368 mutex_exit(&ep->ep_lock);
369
370 RDS_DPRINTF3("rds_ep_fini", "Return EP(%p)", ep);
371 }
372
373 /* Assumes SP write lock is held */
374 int
rds_ep_init(rds_ep_t * ep,ib_guid_t hca_guid)375 rds_ep_init(rds_ep_t *ep, ib_guid_t hca_guid)
376 {
377 uint_t ret;
378
379 RDS_DPRINTF3("rds_ep_init", "Enter: EP(%p) Type: %d", ep, ep->ep_type);
380
381 /* send pool */
382 ret = rds_init_send_pool(ep, hca_guid);
383 if (ret != 0) {
384 RDS_DPRINTF2(LABEL, "EP(%p): rds_init_send_pool failed: %d",
385 ep, ret);
386 return (-1);
387 }
388
389 /* recv pool */
390 ret = rds_init_recv_pool(ep);
391 if (ret != 0) {
392 RDS_DPRINTF2(LABEL, "EP(%p): rds_init_recv_pool failed: %d",
393 ep, ret);
394 rds_free_send_pool(ep);
395 return (-1);
396 }
397
398 /* reset the ep state */
399 mutex_enter(&ep->ep_lock);
400 ep->ep_state = RDS_EP_STATE_UNCONNECTED;
401 ep->ep_hca_guid = hca_guid;
402 ep->ep_lbufid = 0;
403 ep->ep_rbufid = 0;
404 ep->ep_segfbp = NULL;
405 ep->ep_seglbp = NULL;
406
407 /* Initialize the WR to send acknowledgements */
408 ep->ep_ackwr.wr_id = RDS_RDMAW_WRID;
409 ep->ep_ackwr.wr_flags = IBT_WR_SEND_SOLICIT;
410 ep->ep_ackwr.wr_trans = IBT_RC_SRV;
411 ep->ep_ackwr.wr_opcode = IBT_WRC_RDMAW;
412 ep->ep_ackwr.wr_nds = 1;
413 ep->ep_ackwr.wr_sgl = &ep->ep_ackds;
414 ep->ep_ackwr.wr.rc.rcwr.rdma.rdma_raddr = 0;
415 ep->ep_ackwr.wr.rc.rcwr.rdma.rdma_rkey = 0;
416 mutex_exit(&ep->ep_lock);
417
418 RDS_DPRINTF3("rds_ep_init", "Return: EP(%p) type: %d", ep, ep->ep_type);
419
420 return (0);
421 }
422
423 static int
rds_ep_reinit(rds_ep_t * ep,ib_guid_t hca_guid)424 rds_ep_reinit(rds_ep_t *ep, ib_guid_t hca_guid)
425 {
426 int ret;
427
428 RDS_DPRINTF3("rds_ep_reinit", "Enter: EP(%p) Type: %d",
429 ep, ep->ep_type);
430
431 /* Re-initialize send pool */
432 ret = rds_reinit_send_pool(ep, hca_guid);
433 if (ret != 0) {
434 RDS_DPRINTF2("rds_ep_reinit",
435 "EP(%p): rds_reinit_send_pool failed: %d", ep, ret);
436 return (-1);
437 }
438
439 /* free all the receive buffers in the pool */
440 rds_free_recv_pool(ep);
441
442 RDS_DPRINTF3("rds_ep_reinit", "Return: EP(%p) Type: %d",
443 ep, ep->ep_type);
444
445 return (0);
446 }
447
448 void
rds_session_fini(rds_session_t * sp)449 rds_session_fini(rds_session_t *sp)
450 {
451 RDS_DPRINTF2("rds_session_fini", "Enter: SP(0x%p)", sp);
452
453 rds_ep_fini(&sp->session_dataep);
454 rds_ep_fini(&sp->session_ctrlep);
455
456 RDS_DPRINTF2("rds_session_fini", "Return: SP(0x%p)", sp);
457 }
458
459 /*
460 * Allocate and initialize the resources needed for the control and
461 * data channels
462 */
463 int
rds_session_init(rds_session_t * sp)464 rds_session_init(rds_session_t *sp)
465 {
466 int ret;
467 rds_hca_t *hcap;
468 ib_guid_t hca_guid;
469
470 RDS_DPRINTF2("rds_session_init", "Enter: SP(0x%p)", sp);
471
472 /* CALLED WITH SESSION WRITE LOCK */
473
474 hcap = rds_gid_to_hcap(rdsib_statep, sp->session_lgid);
475 if (hcap == NULL) {
476 RDS_DPRINTF2("rds_session_init", "SGID is on an uninitialized "
477 "HCA: %llx", sp->session_lgid.gid_guid);
478 return (-1);
479 }
480
481 hca_guid = hcap->hca_guid;
482 sp->session_hca_guid = hca_guid;
483
484 /* allocate and initialize the ctrl channel */
485 ret = rds_ep_init(&sp->session_ctrlep, hca_guid);
486 if (ret != 0) {
487 RDS_DPRINTF2(LABEL, "SP(%p): Ctrl EP(%p) initialization "
488 "failed", sp, &sp->session_ctrlep);
489 return (-1);
490 }
491
492 RDS_DPRINTF2(LABEL, "SP(%p) Control EP(%p)", sp, &sp->session_ctrlep);
493
494 /* allocate and initialize the data channel */
495 ret = rds_ep_init(&sp->session_dataep, hca_guid);
496 if (ret != 0) {
497 RDS_DPRINTF2(LABEL, "SP(%p): Data EP(%p) initialization "
498 "failed", sp, &sp->session_dataep);
499 rds_ep_fini(&sp->session_ctrlep);
500 return (-1);
501 }
502
503 /* Clear the portmaps */
504 rds_unmark_all_ports(sp, RDS_LOCAL);
505 rds_unmark_all_ports(sp, RDS_REMOTE);
506
507 RDS_DPRINTF2(LABEL, "SP(%p) Data EP(%p)", sp, &sp->session_dataep);
508
509 RDS_DPRINTF2("rds_session_init", "Return");
510
511 return (0);
512 }
513
514 /*
515 * This should be called before moving a session from ERROR state to
516 * INIT state. This will update the HCA keys incase the session has moved from
517 * one HCA to another.
518 */
519 int
rds_session_reinit(rds_session_t * sp,ib_gid_t lgid)520 rds_session_reinit(rds_session_t *sp, ib_gid_t lgid)
521 {
522 rds_hca_t *hcap, *hcap1;
523 int ret;
524
525 RDS_DPRINTF2("rds_session_reinit", "Enter: SP(0x%p) - state: %d",
526 sp, sp->session_state);
527
528 /* CALLED WITH SESSION WRITE LOCK */
529
530 /* Clear the portmaps */
531 rds_unmark_all_ports(sp, RDS_LOCAL);
532 rds_unmark_all_ports(sp, RDS_REMOTE);
533
534 /* This should not happen but just a safe guard */
535 if (sp->session_dataep.ep_ack_addr == 0) {
536 RDS_DPRINTF2("rds_session_reinit",
537 "ERROR: Unexpected: SP(0x%p) - state: %d",
538 sp, sp->session_state);
539 return (-1);
540 }
541
542 /* make the last buffer as the acknowledged */
543 *(uintptr_t *)sp->session_dataep.ep_ack_addr =
544 (uintptr_t)sp->session_dataep.ep_sndpool.pool_tailp;
545
546 hcap = rds_gid_to_hcap(rdsib_statep, lgid);
547 if (hcap == NULL) {
548 RDS_DPRINTF2("rds_session_reinit", "SGID is on an "
549 "uninitialized HCA: %llx", lgid.gid_guid);
550 return (-1);
551 }
552
553 hcap1 = rds_gid_to_hcap(rdsib_statep, sp->session_lgid);
554 if (hcap1 == NULL) {
555 RDS_DPRINTF2("rds_session_reinit", "Seems like HCA %llx "
556 "is unplugged", sp->session_lgid.gid_guid);
557 } else if (hcap->hca_guid == hcap1->hca_guid) {
558 /*
559 * No action is needed as the session did not move across
560 * HCAs
561 */
562 RDS_DPRINTF2("rds_session_reinit", "Failover on the same HCA");
563 return (0);
564 }
565
566 RDS_DPRINTF2("rds_session_reinit", "Failover across HCAs");
567
568 sp->session_hca_guid = hcap->hca_guid;
569
570 /* re-initialize the control channel */
571 ret = rds_ep_reinit(&sp->session_ctrlep, hcap->hca_guid);
572 if (ret != 0) {
573 RDS_DPRINTF2("rds_session_reinit",
574 "SP(%p): Ctrl EP(%p) re-initialization failed",
575 sp, &sp->session_ctrlep);
576 return (-1);
577 }
578
579 RDS_DPRINTF2("rds_session_reinit", "SP(%p) Control EP(%p)",
580 sp, &sp->session_ctrlep);
581
582 /* re-initialize the data channel */
583 ret = rds_ep_reinit(&sp->session_dataep, hcap->hca_guid);
584 if (ret != 0) {
585 RDS_DPRINTF2("rds_session_reinit",
586 "SP(%p): Data EP(%p) re-initialization failed",
587 sp, &sp->session_dataep);
588 return (-1);
589 }
590
591 RDS_DPRINTF2("rds_session_reinit", "SP(%p) Data EP(%p)",
592 sp, &sp->session_dataep);
593
594 sp->session_lgid = lgid;
595
596 RDS_DPRINTF2("rds_session_reinit", "Return: SP(0x%p)", sp);
597
598 return (0);
599 }
600
601 static int
rds_session_connect(rds_session_t * sp)602 rds_session_connect(rds_session_t *sp)
603 {
604 ibt_channel_hdl_t ctrlchan, datachan;
605 rds_ep_t *ep;
606 int ret;
607
608 RDS_DPRINTF2("rds_session_connect", "Enter SP(%p)", sp);
609
610 sp->session_pinfo.pi_sid = rdsib_statep->rds_service_id;
611
612 /* Override the packet life time based on the conf file */
613 if (IBPktLifeTime != 0) {
614 sp->session_pinfo.pi_prim_cep_path.cep_cm_opaque1 =
615 IBPktLifeTime;
616 }
617
618 /* Session type may change if we run into peer-to-peer case. */
619 rw_enter(&sp->session_lock, RW_READER);
620 if (sp->session_type == RDS_SESSION_PASSIVE) {
621 RDS_DPRINTF2("rds_session_connect", "SP(%p) is no longer the "
622 "active end", sp);
623 rw_exit(&sp->session_lock);
624 return (0); /* return success */
625 }
626 rw_exit(&sp->session_lock);
627
628 /* connect the data ep first */
629 ep = &sp->session_dataep;
630 mutex_enter(&ep->ep_lock);
631 if (ep->ep_state == RDS_EP_STATE_UNCONNECTED) {
632 ep->ep_state = RDS_EP_STATE_ACTIVE_PENDING;
633 mutex_exit(&ep->ep_lock);
634 ret = rds_open_rc_channel(ep, &sp->session_pinfo, IBT_BLOCKING,
635 &datachan);
636 if (ret != IBT_SUCCESS) {
637 RDS_DPRINTF2(LABEL, "EP(%p): rds_open_rc_channel "
638 "failed: %d", ep, ret);
639 return (-1);
640 }
641 sp->session_dataep.ep_chanhdl = datachan;
642 } else {
643 RDS_DPRINTF2(LABEL, "SP(%p) Data EP(%p) is in "
644 "unexpected state: %d", sp, ep, ep->ep_state);
645 mutex_exit(&ep->ep_lock);
646 return (-1);
647 }
648
649 RDS_DPRINTF3(LABEL, "SP(%p) EP(%p): Data channel is connected",
650 sp, ep);
651
652 ep = &sp->session_ctrlep;
653 mutex_enter(&ep->ep_lock);
654 if (ep->ep_state == RDS_EP_STATE_UNCONNECTED) {
655 ep->ep_state = RDS_EP_STATE_ACTIVE_PENDING;
656 mutex_exit(&ep->ep_lock);
657 ret = rds_open_rc_channel(ep, &sp->session_pinfo, IBT_BLOCKING,
658 &ctrlchan);
659 if (ret != IBT_SUCCESS) {
660 RDS_DPRINTF2(LABEL, "EP(%p): rds_open_rc_channel "
661 "failed: %d", ep, ret);
662 return (-1);
663 }
664 sp->session_ctrlep.ep_chanhdl = ctrlchan;
665 } else {
666 RDS_DPRINTF2(LABEL, "SP(%p) Control EP(%p) is in "
667 "unexpected state: %d", sp, ep, ep->ep_state);
668 mutex_exit(&ep->ep_lock);
669 return (-1);
670 }
671
672 RDS_DPRINTF2(LABEL, "Session (%p) 0x%x <--> 0x%x is CONNECTED",
673 sp, sp->session_myip, sp->session_remip);
674
675 RDS_DPRINTF2("rds_session_connect", "Return SP(%p)", sp);
676
677 return (0);
678 }
679
680 /*
681 * Can be called with or without session_lock.
682 */
683 void
rds_session_close(rds_session_t * sp,ibt_execution_mode_t mode,uint_t wait)684 rds_session_close(rds_session_t *sp, ibt_execution_mode_t mode, uint_t wait)
685 {
686 rds_ep_t *ep;
687
688 RDS_DPRINTF2("rds_session_close", "SP(%p) State: %d", sp,
689 sp->session_state);
690
691 ep = &sp->session_dataep;
692 RDS_DPRINTF3(LABEL, "EP(%p) State: %d", ep, ep->ep_state);
693
694 /* wait until the SQ is empty before closing */
695 if (wait != 0) {
696 (void) rds_is_sendq_empty(ep, wait);
697 }
698
699 mutex_enter(&ep->ep_lock);
700 while (ep->ep_state == RDS_EP_STATE_CLOSING) {
701 mutex_exit(&ep->ep_lock);
702 delay(drv_usectohz(300000));
703 mutex_enter(&ep->ep_lock);
704 }
705
706 if (ep->ep_state == RDS_EP_STATE_CONNECTED) {
707 ep->ep_state = RDS_EP_STATE_CLOSING;
708 mutex_exit(&ep->ep_lock);
709 (void) rds_close_rc_channel(ep->ep_chanhdl, mode);
710 if (wait == 0) {
711 /* make sure all WCs are flushed before proceeding */
712 (void) rds_is_sendq_empty(ep, 1);
713 }
714 mutex_enter(&ep->ep_lock);
715 }
716 rds_ep_free_rc_channel(ep);
717 ep->ep_state = RDS_EP_STATE_UNCONNECTED;
718 ep->ep_segfbp = NULL;
719 ep->ep_seglbp = NULL;
720 mutex_exit(&ep->ep_lock);
721
722 ep = &sp->session_ctrlep;
723 RDS_DPRINTF3(LABEL, "EP(%p) State: %d", ep, ep->ep_state);
724
725 /* wait until the SQ is empty before closing */
726 if (wait != 0) {
727 (void) rds_is_sendq_empty(ep, wait);
728 }
729
730 mutex_enter(&ep->ep_lock);
731 while (ep->ep_state == RDS_EP_STATE_CLOSING) {
732 mutex_exit(&ep->ep_lock);
733 delay(drv_usectohz(300000));
734 mutex_enter(&ep->ep_lock);
735 }
736
737 if (ep->ep_state == RDS_EP_STATE_CONNECTED) {
738 ep->ep_state = RDS_EP_STATE_CLOSING;
739 mutex_exit(&ep->ep_lock);
740 (void) rds_close_rc_channel(ep->ep_chanhdl, mode);
741 if (wait == 0) {
742 /* make sure all WCs are flushed before proceeding */
743 (void) rds_is_sendq_empty(ep, 1);
744 }
745 mutex_enter(&ep->ep_lock);
746 }
747 rds_ep_free_rc_channel(ep);
748 ep->ep_state = RDS_EP_STATE_UNCONNECTED;
749 ep->ep_segfbp = NULL;
750 ep->ep_seglbp = NULL;
751 mutex_exit(&ep->ep_lock);
752
753 RDS_DPRINTF2("rds_session_close", "Return (%p)", sp);
754 }
755
756 /* Free the session */
757 static void
rds_destroy_session(rds_session_t * sp)758 rds_destroy_session(rds_session_t *sp)
759 {
760 rds_ep_t *ep;
761 rds_bufpool_t *pool;
762
763 ASSERT((sp->session_state == RDS_SESSION_STATE_CLOSED) ||
764 (sp->session_state == RDS_SESSION_STATE_FAILED) ||
765 (sp->session_state == RDS_SESSION_STATE_FINI) ||
766 (sp->session_state == RDS_SESSION_STATE_PASSIVE_CLOSING));
767
768 rw_enter(&sp->session_lock, RW_READER);
769 RDS_DPRINTF2("rds_destroy_session", "SP(%p) State: %d", sp,
770 sp->session_state);
771 while (!((sp->session_state == RDS_SESSION_STATE_CLOSED) ||
772 (sp->session_state == RDS_SESSION_STATE_FAILED) ||
773 (sp->session_state == RDS_SESSION_STATE_FINI))) {
774 rw_exit(&sp->session_lock);
775 delay(drv_usectohz(1000000));
776 rw_enter(&sp->session_lock, RW_READER);
777 RDS_DPRINTF2("rds_destroy_session", "SP(%p) State: %d WAITING "
778 "ON SESSION", sp, sp->session_state);
779 }
780 rw_exit(&sp->session_lock);
781
782 /* data channel */
783 ep = &sp->session_dataep;
784
785 /* send pool locks */
786 pool = &ep->ep_sndpool;
787 cv_destroy(&pool->pool_cv);
788 mutex_destroy(&pool->pool_lock);
789
790 /* recv pool locks */
791 pool = &ep->ep_rcvpool;
792 cv_destroy(&pool->pool_cv);
793 mutex_destroy(&pool->pool_lock);
794 mutex_destroy(&ep->ep_recvqp.qp_lock);
795
796 /* control channel */
797 ep = &sp->session_ctrlep;
798
799 /* send pool locks */
800 pool = &ep->ep_sndpool;
801 cv_destroy(&pool->pool_cv);
802 mutex_destroy(&pool->pool_lock);
803
804 /* recv pool locks */
805 pool = &ep->ep_rcvpool;
806 cv_destroy(&pool->pool_cv);
807 mutex_destroy(&pool->pool_lock);
808 mutex_destroy(&ep->ep_recvqp.qp_lock);
809
810 /* session */
811 rw_destroy(&sp->session_lock);
812 rw_destroy(&sp->session_local_portmap_lock);
813 rw_destroy(&sp->session_remote_portmap_lock);
814
815 /* free the session */
816 kmem_free(sp, sizeof (rds_session_t));
817
818 RDS_DPRINTF2("rds_destroy_session", "SP(%p) Return", sp);
819 }
820
821 /* This is called on the taskq thread */
822 void
rds_failover_session(void * arg)823 rds_failover_session(void *arg)
824 {
825 rds_session_t *sp = (rds_session_t *)arg;
826 ib_gid_t lgid, rgid;
827 ipaddr_t myip, remip;
828 int ret, cnt = 0;
829 uint8_t sp_state;
830
831 RDS_DPRINTF2("rds_failover_session", "Enter: (%p)", sp);
832
833 /* Make sure the session is still alive */
834 if (rds_session_lkup_by_sp(sp) == B_FALSE) {
835 RDS_DPRINTF2("rds_failover_session",
836 "Return: SP(%p) not ALIVE", sp);
837 return;
838 }
839
840 RDS_INCR_FAILOVERS();
841
842 rw_enter(&sp->session_lock, RW_WRITER);
843 if (sp->session_type != RDS_SESSION_ACTIVE) {
844 /*
845 * The remote side must have seen the error and initiated
846 * a re-connect.
847 */
848 RDS_DPRINTF2("rds_failover_session",
849 "SP(%p) has become passive", sp);
850 rw_exit(&sp->session_lock);
851 return;
852 }
853 sp->session_failover = 1;
854 sp_state = sp->session_state;
855 rw_exit(&sp->session_lock);
856
857 /*
858 * The session is in ERROR state but close both channels
859 * for a clean start.
860 */
861 if (sp_state == RDS_SESSION_STATE_ERROR) {
862 rds_session_close(sp, IBT_BLOCKING, 1);
863 }
864
865 /* wait 1 sec before re-connecting */
866 delay(drv_usectohz(1000000));
867
868 do {
869 ibt_ip_path_attr_t ipattr;
870 ibt_ip_addr_t dstip;
871
872 /* The ipaddr should be in the network order */
873 myip = sp->session_myip;
874 remip = sp->session_remip;
875 ret = rds_sc_path_lookup(&myip, &remip);
876 if (ret == 0) {
877 RDS_DPRINTF2(LABEL, "Path not found (0x%x 0x%x)",
878 myip, remip);
879 }
880 /* check if we have (new) path from the source to destination */
881 lgid.gid_prefix = 0;
882 lgid.gid_guid = 0;
883 rgid.gid_prefix = 0;
884 rgid.gid_guid = 0;
885
886 bzero(&ipattr, sizeof (ibt_ip_path_attr_t));
887 dstip.family = AF_INET;
888 dstip.un.ip4addr = remip;
889 ipattr.ipa_dst_ip = &dstip;
890 ipattr.ipa_src_ip.family = AF_INET;
891 ipattr.ipa_src_ip.un.ip4addr = myip;
892 ipattr.ipa_ndst = 1;
893 ipattr.ipa_max_paths = 1;
894 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths: 0x%x <-> 0x%x ",
895 myip, remip);
896 ret = ibt_get_ip_paths(rdsib_statep->rds_ibhdl,
897 IBT_PATH_NO_FLAGS, &ipattr, &sp->session_pinfo, NULL, NULL);
898 if (ret == IBT_SUCCESS) {
899 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths success");
900 lgid = sp->session_pinfo.
901 pi_prim_cep_path.cep_adds_vect.av_sgid;
902 rgid = sp->session_pinfo.
903 pi_prim_cep_path.cep_adds_vect.av_dgid;
904 break;
905 }
906
907 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths failed, ret: %d ", ret);
908
909 /* wait 1 sec before re-trying */
910 delay(drv_usectohz(1000000));
911 cnt++;
912 } while (cnt < 5);
913
914 if (ret != IBT_SUCCESS) {
915 rw_enter(&sp->session_lock, RW_WRITER);
916 if (sp->session_type == RDS_SESSION_ACTIVE) {
917 rds_session_fini(sp);
918 sp->session_state = RDS_SESSION_STATE_FAILED;
919 sp->session_failover = 0;
920 RDS_DPRINTF3("rds_failover_session",
921 "SP(%p) State RDS_SESSION_STATE_FAILED", sp);
922 } else {
923 RDS_DPRINTF2("rds_failover_session",
924 "SP(%p) has become passive", sp);
925 }
926 rw_exit(&sp->session_lock);
927 return;
928 }
929
930 RDS_DPRINTF2(LABEL, "lgid: %llx:%llx rgid: %llx:%llx",
931 lgid.gid_prefix, lgid.gid_guid, rgid.gid_prefix,
932 rgid.gid_guid);
933
934 rw_enter(&sp->session_lock, RW_WRITER);
935 if (sp->session_type != RDS_SESSION_ACTIVE) {
936 /*
937 * The remote side must have seen the error and initiated
938 * a re-connect.
939 */
940 RDS_DPRINTF2("rds_failover_session",
941 "SP(%p) has become passive", sp);
942 rw_exit(&sp->session_lock);
943 return;
944 }
945
946 /* move the session to init state */
947 ret = rds_session_reinit(sp, lgid);
948 sp->session_lgid = lgid;
949 sp->session_rgid = rgid;
950 if (ret != 0) {
951 rds_session_fini(sp);
952 sp->session_state = RDS_SESSION_STATE_FAILED;
953 sp->session_failover = 0;
954 RDS_DPRINTF3("rds_failover_session",
955 "SP(%p) State RDS_SESSION_STATE_FAILED", sp);
956 rw_exit(&sp->session_lock);
957 return;
958 } else {
959 sp->session_state = RDS_SESSION_STATE_INIT;
960 RDS_DPRINTF3("rds_failover_session",
961 "SP(%p) State RDS_SESSION_STATE_INIT", sp);
962 }
963 rw_exit(&sp->session_lock);
964
965 rds_session_open(sp);
966
967 RDS_DPRINTF2("rds_failover_session", "Return: (%p)", sp);
968 }
969
970 void
rds_handle_send_error(rds_ep_t * ep)971 rds_handle_send_error(rds_ep_t *ep)
972 {
973 if (rds_is_sendq_empty(ep, 0)) {
974 /* Session should already be in ERROR, try to reconnect */
975 RDS_DPRINTF2("rds_handle_send_error",
976 "Dispatching taskq to failover SP(%p)", ep->ep_sp);
977 (void) ddi_taskq_dispatch(rds_taskq, rds_failover_session,
978 (void *)ep->ep_sp, DDI_SLEEP);
979 }
980 }
981
982 /*
983 * Called in the CM handler on the passive side
984 * Called on a taskq thread.
985 */
986 void
rds_cleanup_passive_session(void * arg)987 rds_cleanup_passive_session(void *arg)
988 {
989 rds_session_t *sp = arg;
990
991 RDS_DPRINTF2("rds_cleanup_passive_session", "SP(%p) State: %d", sp,
992 sp->session_state);
993 ASSERT((sp->session_state == RDS_SESSION_STATE_CLOSED) ||
994 (sp->session_state == RDS_SESSION_STATE_ERROR));
995
996 rds_session_close(sp, IBT_BLOCKING, 1);
997
998 rw_enter(&sp->session_lock, RW_WRITER);
999 if (sp->session_state == RDS_SESSION_STATE_CLOSED) {
1000 rds_session_fini(sp);
1001 sp->session_state = RDS_SESSION_STATE_FINI;
1002 sp->session_failover = 0;
1003 RDS_DPRINTF3("rds_cleanup_passive_session",
1004 "SP(%p) State RDS_SESSION_STATE_FINI", sp);
1005 } else if (sp->session_state == RDS_SESSION_STATE_ERROR) {
1006 rds_session_fini(sp);
1007 sp->session_state = RDS_SESSION_STATE_FAILED;
1008 sp->session_failover = 0;
1009 RDS_DPRINTF3("rds_cleanup_passive_session",
1010 "SP(%p) State RDS_SESSION_STATE_FAILED", sp);
1011 }
1012 rw_exit(&sp->session_lock);
1013
1014 RDS_DPRINTF2("rds_cleanup_passive_session", "Return: SP (%p)", sp);
1015 }
1016
1017 /*
1018 * Called by the CM handler on the passive side
1019 * Called with WRITE lock on the session
1020 */
1021 void
rds_passive_session_fini(rds_session_t * sp)1022 rds_passive_session_fini(rds_session_t *sp)
1023 {
1024 rds_ep_t *ep;
1025
1026 RDS_DPRINTF2("rds_passive_session_fini", "SP(%p) State: %d", sp,
1027 sp->session_state);
1028 ASSERT((sp->session_state == RDS_SESSION_STATE_CLOSED) ||
1029 (sp->session_state == RDS_SESSION_STATE_ERROR));
1030
1031 /* clean the data channel */
1032 ep = &sp->session_dataep;
1033 (void) rds_is_sendq_empty(ep, 1);
1034 mutex_enter(&ep->ep_lock);
1035 RDS_DPRINTF2("rds_passive_session_fini", "EP(%p) State: %d", ep,
1036 ep->ep_state);
1037 rds_ep_free_rc_channel(ep);
1038 mutex_exit(&ep->ep_lock);
1039
1040 /* clean the control channel */
1041 ep = &sp->session_ctrlep;
1042 (void) rds_is_sendq_empty(ep, 1);
1043 mutex_enter(&ep->ep_lock);
1044 RDS_DPRINTF2("rds_passive_session_fini", "EP(%p) State: %d", ep,
1045 ep->ep_state);
1046 rds_ep_free_rc_channel(ep);
1047 mutex_exit(&ep->ep_lock);
1048
1049 rds_session_fini(sp);
1050 sp->session_failover = 0;
1051
1052 RDS_DPRINTF2("rds_passive_session_fini", "Return: SP (%p)", sp);
1053 }
1054
1055 void
rds_close_this_session(rds_session_t * sp,uint8_t wait)1056 rds_close_this_session(rds_session_t *sp, uint8_t wait)
1057 {
1058 switch (sp->session_state) {
1059 case RDS_SESSION_STATE_CONNECTED:
1060 sp->session_state = RDS_SESSION_STATE_ACTIVE_CLOSING;
1061 rw_exit(&sp->session_lock);
1062
1063 rds_session_close(sp, IBT_BLOCKING, wait);
1064
1065 rw_enter(&sp->session_lock, RW_WRITER);
1066 sp->session_state = RDS_SESSION_STATE_CLOSED;
1067 RDS_DPRINTF3("rds_close_sessions",
1068 "SP(%p) State RDS_SESSION_STATE_CLOSED", sp);
1069 rds_session_fini(sp);
1070 sp->session_state = RDS_SESSION_STATE_FINI;
1071 sp->session_failover = 0;
1072 RDS_DPRINTF3("rds_close_sessions",
1073 "SP(%p) State RDS_SESSION_STATE_FINI", sp);
1074 break;
1075
1076 case RDS_SESSION_STATE_ERROR:
1077 case RDS_SESSION_STATE_PASSIVE_CLOSING:
1078 case RDS_SESSION_STATE_INIT:
1079 sp->session_state = RDS_SESSION_STATE_ACTIVE_CLOSING;
1080 rw_exit(&sp->session_lock);
1081
1082 rds_session_close(sp, IBT_BLOCKING, wait);
1083
1084 rw_enter(&sp->session_lock, RW_WRITER);
1085 sp->session_state = RDS_SESSION_STATE_CLOSED;
1086 RDS_DPRINTF3("rds_close_sessions",
1087 "SP(%p) State RDS_SESSION_STATE_CLOSED", sp);
1088 /* FALLTHRU */
1089 case RDS_SESSION_STATE_CLOSED:
1090 rds_session_fini(sp);
1091 sp->session_state = RDS_SESSION_STATE_FINI;
1092 sp->session_failover = 0;
1093 RDS_DPRINTF3("rds_close_sessions",
1094 "SP(%p) State RDS_SESSION_STATE_FINI", sp);
1095 break;
1096 }
1097 }
1098
1099 /*
1100 * Can be called:
1101 * 1. on driver detach
1102 * 2. on taskq thread
1103 * arg is always NULL
1104 */
1105 /* ARGSUSED */
1106 void
rds_close_sessions(void * arg)1107 rds_close_sessions(void *arg)
1108 {
1109 rds_session_t *sp, *spnextp;
1110
1111 RDS_DPRINTF2("rds_close_sessions", "Enter");
1112
1113 /* wait until all the buffers are freed by the sockets */
1114 while (RDS_GET_RXPKTS_PEND() != 0) {
1115 /* wait one second and try again */
1116 RDS_DPRINTF2("rds_close_sessions", "waiting on "
1117 "pending packets", RDS_GET_RXPKTS_PEND());
1118 delay(drv_usectohz(1000000));
1119 }
1120 RDS_DPRINTF2("rds_close_sessions", "No more RX packets pending");
1121
1122 /* close all the sessions */
1123 rw_enter(&rdsib_statep->rds_sessionlock, RW_WRITER);
1124 sp = rdsib_statep->rds_sessionlistp;
1125 while (sp) {
1126 rw_enter(&sp->session_lock, RW_WRITER);
1127 RDS_DPRINTF2("rds_close_sessions", "SP(%p) State: %d", sp,
1128 sp->session_state);
1129 rds_close_this_session(sp, 2);
1130 rw_exit(&sp->session_lock);
1131 sp = sp->session_nextp;
1132 }
1133
1134 sp = rdsib_statep->rds_sessionlistp;
1135 rdsib_statep->rds_sessionlistp = NULL;
1136 rdsib_statep->rds_nsessions = 0;
1137 rw_exit(&rdsib_statep->rds_sessionlock);
1138
1139 while (sp) {
1140 spnextp = sp->session_nextp;
1141 rds_destroy_session(sp);
1142 RDS_DECR_SESS();
1143 sp = spnextp;
1144 }
1145
1146 /* free the global pool */
1147 rds_free_recv_caches(rdsib_statep);
1148
1149 RDS_DPRINTF2("rds_close_sessions", "Return");
1150 }
1151
1152 void
rds_session_open(rds_session_t * sp)1153 rds_session_open(rds_session_t *sp)
1154 {
1155 int ret;
1156
1157 RDS_DPRINTF2("rds_session_open", "Enter SP(%p)", sp);
1158
1159 ret = rds_session_connect(sp);
1160 if (ret == -1) {
1161 /*
1162 * may be the session has become passive due to
1163 * hitting peer-to-peer case
1164 */
1165 rw_enter(&sp->session_lock, RW_READER);
1166 if (sp->session_type == RDS_SESSION_PASSIVE) {
1167 RDS_DPRINTF2("rds_session_open", "SP(%p) "
1168 "has become passive from active", sp);
1169 rw_exit(&sp->session_lock);
1170 return;
1171 }
1172
1173 /* get the lock for writing */
1174 rw_exit(&sp->session_lock);
1175 rw_enter(&sp->session_lock, RW_WRITER);
1176 sp->session_state = RDS_SESSION_STATE_ERROR;
1177 RDS_DPRINTF3("rds_session_open",
1178 "SP(%p) State RDS_SESSION_STATE_ERROR", sp);
1179 rw_exit(&sp->session_lock);
1180
1181 /* Connect request failed */
1182 rds_session_close(sp, IBT_BLOCKING, 1);
1183
1184 rw_enter(&sp->session_lock, RW_WRITER);
1185 rds_session_fini(sp);
1186 sp->session_state = RDS_SESSION_STATE_FAILED;
1187 sp->session_failover = 0;
1188 RDS_DPRINTF3("rds_session_open",
1189 "SP(%p) State RDS_SESSION_STATE_FAILED", sp);
1190 rw_exit(&sp->session_lock);
1191
1192 return;
1193 }
1194
1195 RDS_DPRINTF2("rds_session_open", "Return: SP(%p)", sp);
1196 }
1197
1198 /*
1199 * Creates a session and inserts it into the list of sessions. The session
1200 * state would be CREATED.
1201 * Return Values:
1202 * EWOULDBLOCK
1203 */
1204 rds_session_t *
rds_session_create(rds_state_t * statep,ipaddr_t localip,ipaddr_t remip,ibt_cm_req_rcv_t * reqp,uint8_t type)1205 rds_session_create(rds_state_t *statep, ipaddr_t localip, ipaddr_t remip,
1206 ibt_cm_req_rcv_t *reqp, uint8_t type)
1207 {
1208 ib_gid_t lgid, rgid;
1209 rds_session_t *newp, *oldp;
1210 rds_ep_t *dataep, *ctrlep;
1211 rds_bufpool_t *pool;
1212 int ret;
1213
1214 RDS_DPRINTF2("rds_session_create", "Enter: 0x%p 0x%x 0x%x, type: %d",
1215 statep, localip, remip, type);
1216
1217 /* Check if there is space for a new session */
1218 rw_enter(&statep->rds_sessionlock, RW_READER);
1219 if (statep->rds_nsessions >= (MaxNodes - 1)) {
1220 rw_exit(&statep->rds_sessionlock);
1221 RDS_DPRINTF1("rds_session_create", "No More Sessions allowed");
1222 return (NULL);
1223 }
1224 rw_exit(&statep->rds_sessionlock);
1225
1226 /* Allocate and initialize global buffer pool */
1227 ret = rds_init_recv_caches(statep);
1228 if (ret != 0) {
1229 RDS_DPRINTF2(LABEL, "Buffer Cache Initialization failed");
1230 return (NULL);
1231 }
1232
1233 /* enough memory for session (includes 2 endpoints) */
1234 newp = kmem_zalloc(sizeof (rds_session_t), KM_SLEEP);
1235
1236 newp->session_remip = remip;
1237 newp->session_myip = localip;
1238 newp->session_type = type;
1239 newp->session_state = RDS_SESSION_STATE_CREATED;
1240 RDS_DPRINTF3("rds_session_create",
1241 "SP(%p) State RDS_SESSION_STATE_CREATED", newp);
1242 rw_init(&newp->session_lock, NULL, RW_DRIVER, NULL);
1243 rw_init(&newp->session_local_portmap_lock, NULL, RW_DRIVER, NULL);
1244 rw_init(&newp->session_remote_portmap_lock, NULL, RW_DRIVER, NULL);
1245
1246 /* Initialize data endpoint */
1247 dataep = &newp->session_dataep;
1248 dataep->ep_remip = newp->session_remip;
1249 dataep->ep_myip = newp->session_myip;
1250 dataep->ep_state = RDS_EP_STATE_UNCONNECTED;
1251 dataep->ep_sp = newp;
1252 dataep->ep_type = RDS_EP_TYPE_DATA;
1253 mutex_init(&dataep->ep_lock, NULL, MUTEX_DRIVER, NULL);
1254
1255 /* Initialize send pool locks */
1256 pool = &dataep->ep_sndpool;
1257 mutex_init(&pool->pool_lock, NULL, MUTEX_DRIVER, NULL);
1258 cv_init(&pool->pool_cv, NULL, CV_DRIVER, NULL);
1259
1260 /* Initialize recv pool locks */
1261 pool = &dataep->ep_rcvpool;
1262 mutex_init(&dataep->ep_recvqp.qp_lock, NULL, MUTEX_DRIVER, NULL);
1263 mutex_init(&pool->pool_lock, NULL, MUTEX_DRIVER, NULL);
1264 cv_init(&pool->pool_cv, NULL, CV_DRIVER, NULL);
1265
1266 /* Initialize control endpoint */
1267 ctrlep = &newp->session_ctrlep;
1268 ctrlep->ep_remip = newp->session_remip;
1269 ctrlep->ep_myip = newp->session_myip;
1270 ctrlep->ep_state = RDS_EP_STATE_UNCONNECTED;
1271 ctrlep->ep_sp = newp;
1272 ctrlep->ep_type = RDS_EP_TYPE_CTRL;
1273 mutex_init(&ctrlep->ep_lock, NULL, MUTEX_DRIVER, NULL);
1274
1275 /* Initialize send pool locks */
1276 pool = &ctrlep->ep_sndpool;
1277 mutex_init(&pool->pool_lock, NULL, MUTEX_DRIVER, NULL);
1278 cv_init(&pool->pool_cv, NULL, CV_DRIVER, NULL);
1279
1280 /* Initialize recv pool locks */
1281 pool = &ctrlep->ep_rcvpool;
1282 mutex_init(&ctrlep->ep_recvqp.qp_lock, NULL, MUTEX_DRIVER, NULL);
1283 mutex_init(&pool->pool_lock, NULL, MUTEX_DRIVER, NULL);
1284 cv_init(&pool->pool_cv, NULL, CV_DRIVER, NULL);
1285
1286 /* lkup if there is already a session */
1287 rw_enter(&statep->rds_sessionlock, RW_WRITER);
1288 oldp = rds_session_lkup(statep, remip, 0);
1289 if (oldp != NULL) {
1290 /* A session to this destination exists */
1291 rw_exit(&statep->rds_sessionlock);
1292 rw_destroy(&newp->session_lock);
1293 rw_destroy(&newp->session_local_portmap_lock);
1294 rw_destroy(&newp->session_remote_portmap_lock);
1295 mutex_destroy(&dataep->ep_lock);
1296 mutex_destroy(&ctrlep->ep_lock);
1297 kmem_free(newp, sizeof (rds_session_t));
1298 return (NULL);
1299 }
1300
1301 /* Insert this session into the list */
1302 if (rds_add_session(newp, B_TRUE) != B_TRUE) {
1303 /* No room to add this session */
1304 rw_exit(&statep->rds_sessionlock);
1305 rw_destroy(&newp->session_lock);
1306 rw_destroy(&newp->session_local_portmap_lock);
1307 rw_destroy(&newp->session_remote_portmap_lock);
1308 mutex_destroy(&dataep->ep_lock);
1309 mutex_destroy(&ctrlep->ep_lock);
1310 kmem_free(newp, sizeof (rds_session_t));
1311 return (NULL);
1312 }
1313
1314 /* unlock the session list */
1315 rw_exit(&statep->rds_sessionlock);
1316
1317 if (type == RDS_SESSION_ACTIVE) {
1318 ipaddr_t localip1, remip1;
1319 ibt_ip_path_attr_t ipattr;
1320 ibt_ip_addr_t dstip;
1321
1322 /* The ipaddr should be in the network order */
1323 localip1 = localip;
1324 remip1 = remip;
1325 ret = rds_sc_path_lookup(&localip1, &remip1);
1326 if (ret == 0) {
1327 RDS_DPRINTF2(LABEL, "Path not found (0x%x 0x%x)",
1328 localip, remip);
1329 }
1330
1331 /* Get the gids for the source and destination ip addrs */
1332 lgid.gid_prefix = 0;
1333 lgid.gid_guid = 0;
1334 rgid.gid_prefix = 0;
1335 rgid.gid_guid = 0;
1336
1337 bzero(&ipattr, sizeof (ibt_ip_path_attr_t));
1338 dstip.family = AF_INET;
1339 dstip.un.ip4addr = remip1;
1340 ipattr.ipa_dst_ip = &dstip;
1341 ipattr.ipa_src_ip.family = AF_INET;
1342 ipattr.ipa_src_ip.un.ip4addr = localip1;
1343 ipattr.ipa_ndst = 1;
1344 ipattr.ipa_max_paths = 1;
1345 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths: 0x%x <-> 0x%x ",
1346 localip1, remip1);
1347 ret = ibt_get_ip_paths(rdsib_statep->rds_ibhdl,
1348 IBT_PATH_NO_FLAGS, &ipattr, &newp->session_pinfo,
1349 NULL, NULL);
1350 if (ret != IBT_SUCCESS) {
1351 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths failed, ret: %d "
1352 "lgid: %llx:%llx rgid: %llx:%llx", lgid.gid_prefix,
1353 lgid.gid_guid, rgid.gid_prefix, rgid.gid_guid);
1354
1355 RDS_SESSION_TRANSITION(newp, RDS_SESSION_STATE_FAILED);
1356 return (NULL);
1357 }
1358 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths success");
1359 lgid =
1360 newp->session_pinfo.pi_prim_cep_path.cep_adds_vect.av_sgid;
1361 rgid =
1362 newp->session_pinfo.pi_prim_cep_path.cep_adds_vect.av_dgid;
1363
1364 RDS_DPRINTF2(LABEL, "lgid: %llx:%llx rgid: %llx:%llx",
1365 lgid.gid_prefix, lgid.gid_guid, rgid.gid_prefix,
1366 rgid.gid_guid);
1367 }
1368
1369 rw_enter(&newp->session_lock, RW_WRITER);
1370 /* check for peer-to-peer case */
1371 if (type == newp->session_type) {
1372 /* no peer-to-peer case */
1373 if (type == RDS_SESSION_ACTIVE) {
1374 newp->session_lgid = lgid;
1375 newp->session_rgid = rgid;
1376 } else {
1377 /* rgid is requester gid & lgid is receiver gid */
1378 newp->session_rgid = reqp->req_prim_addr.av_dgid;
1379 newp->session_lgid = reqp->req_prim_addr.av_sgid;
1380 }
1381 }
1382 rw_exit(&newp->session_lock);
1383
1384 RDS_DPRINTF2("rds_session_create", "Return SP(%p)", newp);
1385
1386 return (newp);
1387 }
1388
1389 void
rds_handle_close_session_request(void * arg)1390 rds_handle_close_session_request(void *arg)
1391 {
1392 rds_session_t *sp = (rds_session_t *)arg;
1393
1394 RDS_DPRINTF2("rds_handle_close_session_request",
1395 "Enter: Closing this Session (%p)", sp);
1396
1397 rw_enter(&sp->session_lock, RW_WRITER);
1398 RDS_DPRINTF2("rds_handle_close_session_request",
1399 "SP(%p) State: %d", sp, sp->session_state);
1400 rds_close_this_session(sp, 2);
1401 rw_exit(&sp->session_lock);
1402
1403 RDS_DPRINTF2("rds_handle_close_session_request", "Return SP(%p)", sp);
1404 }
1405
1406 void
rds_handle_control_message(rds_session_t * sp,rds_ctrl_pkt_t * cpkt)1407 rds_handle_control_message(rds_session_t *sp, rds_ctrl_pkt_t *cpkt)
1408 {
1409 RDS_DPRINTF4("rds_handle_control_message", "Enter: SP(%p) code: %d "
1410 "port: %d", sp, cpkt->rcp_code, cpkt->rcp_port);
1411
1412 switch (cpkt->rcp_code) {
1413 case RDS_CTRL_CODE_STALL:
1414 RDS_INCR_STALLS_RCVD();
1415 (void) rds_check_n_mark_port(sp, cpkt->rcp_port, RDS_REMOTE);
1416 break;
1417 case RDS_CTRL_CODE_UNSTALL:
1418 RDS_INCR_UNSTALLS_RCVD();
1419 (void) rds_check_n_unmark_port(sp, cpkt->rcp_port, RDS_REMOTE);
1420 break;
1421 case RDS_CTRL_CODE_STALL_PORTS:
1422 rds_mark_all_ports(sp, RDS_REMOTE);
1423 break;
1424 case RDS_CTRL_CODE_UNSTALL_PORTS:
1425 rds_unmark_all_ports(sp, RDS_REMOTE);
1426 break;
1427 case RDS_CTRL_CODE_HEARTBEAT:
1428 break;
1429 case RDS_CTRL_CODE_CLOSE_SESSION:
1430 RDS_DPRINTF2("rds_handle_control_message",
1431 "SP(%p) Remote Requested to close this session", sp);
1432 (void) ddi_taskq_dispatch(rds_taskq,
1433 rds_handle_close_session_request, (void *)sp, DDI_SLEEP);
1434 break;
1435 default:
1436 RDS_DPRINTF2(LABEL, "ERROR: Invalid Control code: %d",
1437 cpkt->rcp_code);
1438 break;
1439 }
1440
1441 RDS_DPRINTF4("rds_handle_control_message", "Return");
1442 }
1443
1444 int
rds_post_control_message(rds_session_t * sp,uint8_t code,in_port_t port)1445 rds_post_control_message(rds_session_t *sp, uint8_t code, in_port_t port)
1446 {
1447 ibt_send_wr_t wr;
1448 rds_ep_t *ep;
1449 rds_buf_t *bp;
1450 rds_ctrl_pkt_t *cp;
1451 int ret;
1452
1453 RDS_DPRINTF4("rds_post_control_message", "Enter: SP(%p) Code: %d "
1454 "Port: %d", sp, code, port);
1455
1456 ep = &sp->session_ctrlep;
1457
1458 bp = rds_get_send_buf(ep, 1);
1459 if (bp == NULL) {
1460 RDS_DPRINTF2(LABEL, "No buffers available to send control "
1461 "message: SP(%p) Code: %d Port: %d", sp, code,
1462 port);
1463 return (-1);
1464 }
1465
1466 cp = (rds_ctrl_pkt_t *)(uintptr_t)bp->buf_ds.ds_va;
1467 cp->rcp_code = code;
1468 cp->rcp_port = port;
1469 bp->buf_ds.ds_len = RDS_CTRLPKT_SIZE;
1470
1471 wr.wr_id = (uintptr_t)bp;
1472 wr.wr_flags = IBT_WR_SEND_SOLICIT;
1473 wr.wr_trans = IBT_RC_SRV;
1474 wr.wr_opcode = IBT_WRC_SEND;
1475 wr.wr_nds = 1;
1476 wr.wr_sgl = &bp->buf_ds;
1477 RDS_DPRINTF5(LABEL, "ds_va %p ds_len %d ds_lkey 0x%llx",
1478 bp->buf_ds.ds_va, bp->buf_ds.ds_len, bp->buf_ds.ds_key);
1479 ret = ibt_post_send(ep->ep_chanhdl, &wr, 1, NULL);
1480 if (ret != IBT_SUCCESS) {
1481 RDS_DPRINTF2(LABEL, "EP(%p): ibt_post_send failed: "
1482 "%d", ep, ret);
1483 bp->buf_state = RDS_SNDBUF_FREE;
1484 rds_free_send_buf(ep, bp, NULL, 1, B_FALSE);
1485 return (-1);
1486 }
1487
1488 RDS_DPRINTF4("rds_post_control_message", "Return SP(%p) Code: %d "
1489 "Port: %d", sp, code, port);
1490
1491 return (0);
1492 }
1493
1494 void
rds_stall_port(rds_session_t * sp,in_port_t port,uint_t qualifier)1495 rds_stall_port(rds_session_t *sp, in_port_t port, uint_t qualifier)
1496 {
1497 int ret;
1498
1499 RDS_DPRINTF4("rds_stall_port", "Enter: SP(%p) Port %d", sp, port);
1500
1501 RDS_INCR_STALLS_TRIGGERED();
1502
1503 if (!rds_check_n_mark_port(sp, port, qualifier)) {
1504
1505 if (sp != NULL) {
1506 ret = rds_post_control_message(sp,
1507 RDS_CTRL_CODE_STALL, port);
1508 if (ret != 0) {
1509 (void) rds_check_n_unmark_port(sp, port,
1510 qualifier);
1511 return;
1512 }
1513 RDS_INCR_STALLS_SENT();
1514 }
1515 } else {
1516 RDS_DPRINTF3(LABEL,
1517 "Port %d is already in stall state", port);
1518 }
1519
1520 RDS_DPRINTF4("rds_stall_port", "Return: SP(%p) Port %d", sp, port);
1521 }
1522
1523 void
rds_resume_port(in_port_t port)1524 rds_resume_port(in_port_t port)
1525 {
1526 rds_session_t *sp;
1527 uint_t ix;
1528 int ret;
1529
1530 RDS_DPRINTF4("rds_resume_port", "Enter: Port %d", port);
1531
1532 RDS_INCR_UNSTALLS_TRIGGERED();
1533
1534 /* resume loopback traffic */
1535 (void) rds_check_n_unmark_port(NULL, port, RDS_LOOPBACK);
1536
1537 /* send unstall messages to resume the remote traffic */
1538 rw_enter(&rdsib_statep->rds_sessionlock, RW_READER);
1539
1540 sp = rdsib_statep->rds_sessionlistp;
1541 for (ix = 0; ix < rdsib_statep->rds_nsessions; ix++) {
1542 ASSERT(sp != NULL);
1543 if ((sp->session_state == RDS_SESSION_STATE_CONNECTED) &&
1544 (rds_check_n_unmark_port(sp, port, RDS_LOCAL))) {
1545 ret = rds_post_control_message(sp,
1546 RDS_CTRL_CODE_UNSTALL, port);
1547 if (ret != 0) {
1548 (void) rds_check_n_mark_port(sp, port,
1549 RDS_LOCAL);
1550 } else {
1551 RDS_INCR_UNSTALLS_SENT();
1552 }
1553 }
1554
1555 sp = sp->session_nextp;
1556 }
1557
1558 rw_exit(&rdsib_statep->rds_sessionlock);
1559
1560 RDS_DPRINTF4("rds_resume_port", "Return: Port %d", port);
1561 }
1562
1563 static int
rds_build_n_post_msg(rds_ep_t * ep,uio_t * uiop,in_port_t sendport,in_port_t recvport)1564 rds_build_n_post_msg(rds_ep_t *ep, uio_t *uiop, in_port_t sendport,
1565 in_port_t recvport)
1566 {
1567 ibt_send_wr_t *wrp, wr;
1568 rds_buf_t *bp, *bp1;
1569 rds_data_hdr_t *pktp;
1570 uint32_t msgsize, npkts, residual, pktno, ix;
1571 int ret;
1572
1573 RDS_DPRINTF4("rds_build_n_post_msg", "Enter: EP(%p) UIOP(%p)",
1574 ep, uiop);
1575
1576 /* how many pkts are needed to carry this msg */
1577 msgsize = uiop->uio_resid;
1578 npkts = ((msgsize - 1) / UserBufferSize) + 1;
1579 residual = ((msgsize - 1) % UserBufferSize) + 1;
1580
1581 RDS_DPRINTF5(LABEL, "EP(%p) UIOP(%p) msg size: %d npkts: %d", ep, uiop,
1582 msgsize, npkts);
1583
1584 /* Get the buffers needed to post this message */
1585 bp = rds_get_send_buf(ep, npkts);
1586 if (bp == NULL) {
1587 RDS_INCR_ENOBUFS();
1588 return (ENOBUFS);
1589 }
1590
1591 if (npkts > 1) {
1592 /*
1593 * multi-pkt messages are posted at the same time as a list
1594 * of WRs
1595 */
1596 wrp = (ibt_send_wr_t *)kmem_zalloc(sizeof (ibt_send_wr_t) *
1597 npkts, KM_SLEEP);
1598 }
1599
1600
1601 pktno = 0;
1602 bp1 = bp;
1603 do {
1604 /* prepare the header */
1605 pktp = (rds_data_hdr_t *)(uintptr_t)bp1->buf_ds.ds_va;
1606 pktp->dh_datalen = UserBufferSize;
1607 pktp->dh_npkts = npkts - pktno;
1608 pktp->dh_psn = pktno;
1609 pktp->dh_sendport = sendport;
1610 pktp->dh_recvport = recvport;
1611 bp1->buf_ds.ds_len = RdsPktSize;
1612
1613 /* copy the data */
1614 ret = uiomove((uint8_t *)pktp + RDS_DATA_HDR_SZ,
1615 UserBufferSize, UIO_WRITE, uiop);
1616 if (ret != 0) {
1617 break;
1618 }
1619
1620 if (uiop->uio_resid == 0) {
1621 pktp->dh_datalen = residual;
1622 bp1->buf_ds.ds_len = residual + RDS_DATA_HDR_SZ;
1623 break;
1624 }
1625 pktno++;
1626 bp1 = bp1->buf_nextp;
1627 } while (uiop->uio_resid);
1628
1629 if (ret) {
1630 /* uiomove failed */
1631 RDS_DPRINTF2("rds_build_n_post_msg", "UIO(%p) Move FAILED: %d",
1632 uiop, ret);
1633 if (npkts > 1) {
1634 kmem_free(wrp, npkts * sizeof (ibt_send_wr_t));
1635 }
1636 rds_free_send_buf(ep, bp, NULL, npkts, B_FALSE);
1637 return (ret);
1638 }
1639
1640 if (npkts > 1) {
1641 /* multi-pkt message */
1642 RDS_DPRINTF5(LABEL, "EP(%p) Sending Multiple Packets", ep);
1643
1644 bp1 = bp;
1645 for (ix = 0; ix < npkts; ix++) {
1646 wrp[ix].wr_id = (uintptr_t)bp1;
1647 wrp[ix].wr_flags = IBT_WR_NO_FLAGS;
1648 wrp[ix].wr_trans = IBT_RC_SRV;
1649 wrp[ix].wr_opcode = IBT_WRC_SEND;
1650 wrp[ix].wr_nds = 1;
1651 wrp[ix].wr_sgl = &bp1->buf_ds;
1652 bp1 = bp1->buf_nextp;
1653 }
1654 wrp[npkts - 1].wr_flags = IBT_WR_SEND_SOLICIT;
1655
1656 ret = ibt_post_send(ep->ep_chanhdl, wrp, npkts, &ix);
1657 if (ret != IBT_SUCCESS) {
1658 RDS_DPRINTF2(LABEL, "EP(%p): ibt_post_send failed: "
1659 "%d for %d pkts", ep, ret, npkts);
1660 rds_free_send_buf(ep, bp, NULL, npkts, B_FALSE);
1661 kmem_free(wrp, npkts * sizeof (ibt_send_wr_t));
1662 return (ret);
1663 }
1664
1665 kmem_free(wrp, npkts * sizeof (ibt_send_wr_t));
1666 } else {
1667 /* single pkt */
1668 RDS_DPRINTF5(LABEL, "EP(%p) Sending Single Packet", ep);
1669 wr.wr_id = (uintptr_t)bp;
1670 wr.wr_flags = IBT_WR_SEND_SOLICIT;
1671 wr.wr_trans = IBT_RC_SRV;
1672 wr.wr_opcode = IBT_WRC_SEND;
1673 wr.wr_nds = 1;
1674 wr.wr_sgl = &bp->buf_ds;
1675 RDS_DPRINTF5(LABEL, "ds_va %p ds_key 0x%llx ds_len %d ",
1676 bp->buf_ds.ds_va, bp->buf_ds.ds_key, bp->buf_ds.ds_len);
1677 ret = ibt_post_send(ep->ep_chanhdl, &wr, 1, NULL);
1678 if (ret != IBT_SUCCESS) {
1679 RDS_DPRINTF2(LABEL, "EP(%p): ibt_post_send failed: "
1680 "%d", ep, ret);
1681 rds_free_send_buf(ep, bp, NULL, 1, B_FALSE);
1682 return (ret);
1683 }
1684 }
1685
1686 RDS_INCR_TXPKTS(npkts);
1687 RDS_INCR_TXBYTES(msgsize);
1688
1689 RDS_DPRINTF4("rds_build_n_post_msg", "Return: EP(%p) UIOP(%p)",
1690 ep, uiop);
1691
1692 return (0);
1693 }
1694
1695 static int
rds_deliver_loopback_msg(uio_t * uiop,ipaddr_t recvip,ipaddr_t sendip,in_port_t recvport,in_port_t sendport,zoneid_t zoneid)1696 rds_deliver_loopback_msg(uio_t *uiop, ipaddr_t recvip, ipaddr_t sendip,
1697 in_port_t recvport, in_port_t sendport, zoneid_t zoneid)
1698 {
1699 mblk_t *mp;
1700 int ret;
1701
1702 RDS_DPRINTF4("rds_deliver_loopback_msg", "Enter");
1703
1704 RDS_DPRINTF3(LABEL, "Loopback message: sendport: "
1705 "%d to recvport: %d", sendport, recvport);
1706
1707 mp = allocb(uiop->uio_resid, BPRI_MED);
1708 if (mp == NULL) {
1709 RDS_DPRINTF2(LABEL, "allocb failed, size: %d\n",
1710 uiop->uio_resid);
1711 return (ENOSPC);
1712 }
1713 mp->b_wptr = mp->b_rptr + uiop->uio_resid;
1714
1715 ret = uiomove(mp->b_rptr, uiop->uio_resid, UIO_WRITE, uiop);
1716 if (ret) {
1717 RDS_DPRINTF2(LABEL, "ERROR: uiomove returned: %d", ret);
1718 freeb(mp);
1719 return (ret);
1720 }
1721
1722 ret = rds_deliver_new_msg(mp, recvip, sendip, recvport, sendport,
1723 zoneid);
1724 if (ret != 0) {
1725 if (ret == ENOSPC) {
1726 /*
1727 * The message is delivered but cannot take more,
1728 * stop further loopback traffic to this port
1729 */
1730 RDS_DPRINTF3("rds_deliver_loopback_msg",
1731 "Port %d NO SPACE", recvport);
1732 rds_stall_port(NULL, recvport, RDS_LOOPBACK);
1733 } else {
1734 RDS_DPRINTF2(LABEL, "Loopback message: port %d -> "
1735 "port %d failed: %d", sendport, recvport, ret);
1736 return (ret);
1737 }
1738 }
1739
1740 RDS_DPRINTF4("rds_deliver_loopback_msg", "Return");
1741 return (0);
1742 }
1743
1744 static void
rds_resend_messages(void * arg)1745 rds_resend_messages(void *arg)
1746 {
1747 rds_session_t *sp = (rds_session_t *)arg;
1748 rds_ep_t *ep;
1749 rds_bufpool_t *spool;
1750 rds_buf_t *bp, *endp, *tmp;
1751 ibt_send_wr_t *wrp;
1752 uint_t nwr = 0, ix, jx;
1753 int ret;
1754
1755 RDS_DPRINTF2("rds_resend_messages", "Enter: SP(%p)", sp);
1756
1757 ep = &sp->session_dataep;
1758
1759 spool = &ep->ep_sndpool;
1760 mutex_enter(&spool->pool_lock);
1761
1762 ASSERT(spool->pool_nfree == spool->pool_nbuffers);
1763
1764 if (ep->ep_lbufid == 0) {
1765 RDS_DPRINTF2("rds_resend_messages",
1766 "SP(%p) Remote session is cleaned up ", sp);
1767 /*
1768 * The remote end cleaned up its session. There may be loss
1769 * of messages. Mark all buffers as acknowledged.
1770 */
1771 tmp = spool->pool_tailp;
1772 } else {
1773 tmp = (rds_buf_t *)ep->ep_lbufid;
1774 RDS_DPRINTF2("rds_resend_messages",
1775 "SP(%p) Last successful BP(%p) ", sp, tmp);
1776 }
1777
1778 endp = spool->pool_tailp;
1779 bp = spool->pool_headp;
1780 jx = 0;
1781 while ((bp != NULL) && (bp != tmp)) {
1782 bp->buf_state = RDS_SNDBUF_FREE;
1783 jx++;
1784 bp = bp->buf_nextp;
1785 }
1786
1787 if (bp == NULL) {
1788 mutex_exit(&spool->pool_lock);
1789 RDS_DPRINTF2("rds_resend_messages", "Alert: lbufid(%p) is not "
1790 "found in the list", tmp);
1791
1792 rw_enter(&sp->session_lock, RW_WRITER);
1793 if (sp->session_state == RDS_SESSION_STATE_INIT) {
1794 sp->session_state = RDS_SESSION_STATE_CONNECTED;
1795 } else {
1796 RDS_DPRINTF2("rds_resend_messages", "SP(%p) State: %d "
1797 "Expected State: %d", sp, sp->session_state,
1798 RDS_SESSION_STATE_CONNECTED);
1799 }
1800 sp->session_failover = 0;
1801 rw_exit(&sp->session_lock);
1802 return;
1803 }
1804
1805 /* Found the match */
1806 bp->buf_state = RDS_SNDBUF_FREE;
1807 jx++;
1808
1809 spool->pool_tailp = bp;
1810 bp = bp->buf_nextp;
1811 spool->pool_tailp->buf_nextp = NULL;
1812 nwr = spool->pool_nfree - jx;
1813 spool->pool_nfree = jx;
1814 mutex_exit(&spool->pool_lock);
1815
1816 RDS_DPRINTF2("rds_resend_messages", "SP(%p): Number of "
1817 "bufs (BP %p) to re-send: %d", sp, bp, nwr);
1818
1819 if (bp) {
1820 wrp = (ibt_send_wr_t *)kmem_zalloc(sizeof (ibt_send_wr_t) * 100,
1821 KM_SLEEP);
1822
1823 while (nwr) {
1824 jx = (nwr > 100) ? 100 : nwr;
1825
1826 tmp = bp;
1827 for (ix = 0; ix < jx; ix++) {
1828 bp->buf_state = RDS_SNDBUF_PENDING;
1829 wrp[ix].wr_id = (uintptr_t)bp;
1830 wrp[ix].wr_flags = IBT_WR_SEND_SOLICIT;
1831 wrp[ix].wr_trans = IBT_RC_SRV;
1832 wrp[ix].wr_opcode = IBT_WRC_SEND;
1833 wrp[ix].wr_nds = 1;
1834 wrp[ix].wr_sgl = &bp->buf_ds;
1835 bp = bp->buf_nextp;
1836 }
1837
1838 ret = ibt_post_send(ep->ep_chanhdl, wrp, jx, &ix);
1839 if (ret != IBT_SUCCESS) {
1840 RDS_DPRINTF2(LABEL, "EP(%p): ibt_post_send "
1841 "failed: %d for % pkts", ep, ret, jx);
1842 break;
1843 }
1844
1845 mutex_enter(&spool->pool_lock);
1846 spool->pool_nbusy += jx;
1847 mutex_exit(&spool->pool_lock);
1848
1849 nwr -= jx;
1850 }
1851
1852 kmem_free(wrp, sizeof (ibt_send_wr_t) * 100);
1853
1854 if (nwr != 0) {
1855
1856 /*
1857 * An error while failover is in progress. Some WRs are
1858 * posted while other remain. If any of the posted WRs
1859 * complete in error then they would dispatch a taskq to
1860 * do a failover. Getting the session lock will prevent
1861 * the taskq to wait until we are done here.
1862 */
1863 rw_enter(&sp->session_lock, RW_READER);
1864
1865 /*
1866 * Wait until all the previous WRs are completed and
1867 * then queue the remaining, otherwise the order of
1868 * the messages may change.
1869 */
1870 (void) rds_is_sendq_empty(ep, 1);
1871
1872 /* free the remaining buffers */
1873 rds_free_send_buf(ep, tmp, endp, nwr, B_FALSE);
1874
1875 rw_exit(&sp->session_lock);
1876 return;
1877 }
1878 }
1879
1880 rw_enter(&sp->session_lock, RW_WRITER);
1881 if (sp->session_state == RDS_SESSION_STATE_INIT) {
1882 sp->session_state = RDS_SESSION_STATE_CONNECTED;
1883 } else {
1884 RDS_DPRINTF2("rds_resend_messages", "SP(%p) State: %d "
1885 "Expected State: %d", sp, sp->session_state,
1886 RDS_SESSION_STATE_CONNECTED);
1887 }
1888 sp->session_failover = 0;
1889 rw_exit(&sp->session_lock);
1890
1891 RDS_DPRINTF2("rds_resend_messages", "Return: SP(%p)", sp);
1892 }
1893
1894 /*
1895 * This is called when a channel is connected. Transition the session to
1896 * CONNECTED state iff both channels are connected.
1897 */
1898 void
rds_session_active(rds_session_t * sp)1899 rds_session_active(rds_session_t *sp)
1900 {
1901 rds_ep_t *ep;
1902 uint_t failover;
1903
1904 RDS_DPRINTF2("rds_session_active", "Enter: 0x%p", sp);
1905
1906 rw_enter(&sp->session_lock, RW_READER);
1907
1908 failover = sp->session_failover;
1909
1910 /*
1911 * we establish the data channel first, so check the control channel
1912 * first but make sure it is initialized.
1913 */
1914 ep = &sp->session_ctrlep;
1915 mutex_enter(&ep->ep_lock);
1916 if (ep->ep_state != RDS_EP_STATE_CONNECTED) {
1917 /* the session is not ready yet */
1918 mutex_exit(&ep->ep_lock);
1919 rw_exit(&sp->session_lock);
1920 return;
1921 }
1922 mutex_exit(&ep->ep_lock);
1923
1924 /* control channel is connected, check the data channel */
1925 ep = &sp->session_dataep;
1926 mutex_enter(&ep->ep_lock);
1927 if (ep->ep_state != RDS_EP_STATE_CONNECTED) {
1928 /* data channel is not yet connected */
1929 mutex_exit(&ep->ep_lock);
1930 rw_exit(&sp->session_lock);
1931 return;
1932 }
1933 mutex_exit(&ep->ep_lock);
1934
1935 if (failover) {
1936 rw_exit(&sp->session_lock);
1937
1938 /*
1939 * The session has failed over. Previous msgs have to be
1940 * re-sent before the session is moved to the connected
1941 * state.
1942 */
1943 RDS_DPRINTF2("rds_session_active", "SP(%p) Dispatching taskq "
1944 "to re-send messages", sp);
1945 (void) ddi_taskq_dispatch(rds_taskq,
1946 rds_resend_messages, (void *)sp, DDI_SLEEP);
1947 return;
1948 }
1949
1950 /* the session is ready */
1951 sp->session_state = RDS_SESSION_STATE_CONNECTED;
1952 RDS_DPRINTF3("rds_session_active",
1953 "SP(%p) State RDS_SESSION_STATE_CONNECTED", sp);
1954
1955 rw_exit(&sp->session_lock);
1956
1957 RDS_DPRINTF2("rds_session_active", "Return: SP(%p) is CONNECTED", sp);
1958 }
1959
1960 static int
rds_ep_sendmsg(rds_ep_t * ep,uio_t * uiop,in_port_t sendport,in_port_t recvport)1961 rds_ep_sendmsg(rds_ep_t *ep, uio_t *uiop, in_port_t sendport,
1962 in_port_t recvport)
1963 {
1964 int ret;
1965
1966 RDS_DPRINTF4("rds_ep_sendmsg", "Enter: EP(%p) sendport: %d recvport: "
1967 "%d", ep, sendport, recvport);
1968
1969 /* make sure the remote port is not stalled */
1970 if (rds_is_port_marked(ep->ep_sp, recvport, RDS_REMOTE)) {
1971 RDS_DPRINTF2(LABEL, "SP(%p) Port:%d is in stall state",
1972 ep->ep_sp, recvport);
1973 RDS_INCR_EWOULDBLOCK();
1974 ret = ENOMEM;
1975 } else {
1976 ret = rds_build_n_post_msg(ep, uiop, sendport, recvport);
1977 }
1978
1979 RDS_DPRINTF4("rds_ep_sendmsg", "Return: EP(%p)", ep);
1980
1981 return (ret);
1982 }
1983
1984 /* Send a message to a destination socket */
1985 int
rds_sendmsg(uio_t * uiop,ipaddr_t sendip,ipaddr_t recvip,in_port_t sendport,in_port_t recvport,zoneid_t zoneid)1986 rds_sendmsg(uio_t *uiop, ipaddr_t sendip, ipaddr_t recvip, in_port_t sendport,
1987 in_port_t recvport, zoneid_t zoneid)
1988 {
1989 rds_session_t *sp;
1990 ib_gid_t lgid, rgid;
1991 int ret;
1992
1993 RDS_DPRINTF4("rds_sendmsg", "Enter: uiop: 0x%p, srcIP: 0x%x destIP: "
1994 "0x%x sndport: %d recvport: %d", uiop, sendip, recvip,
1995 sendport, recvport);
1996
1997 /* If msg length is 0, just return success */
1998 if (uiop->uio_resid == 0) {
1999 RDS_DPRINTF2("rds_sendmsg", "Zero sized message");
2000 return (0);
2001 }
2002
2003 /* Is there a session to the destination? */
2004 rw_enter(&rdsib_statep->rds_sessionlock, RW_READER);
2005 sp = rds_session_lkup(rdsib_statep, recvip, 0);
2006 rw_exit(&rdsib_statep->rds_sessionlock);
2007
2008 /* Is this a loopback message? */
2009 if ((sp == NULL) && (rds_islocal(recvip))) {
2010 /* make sure the port is not stalled */
2011 if (rds_is_port_marked(NULL, recvport, RDS_LOOPBACK)) {
2012 RDS_DPRINTF2(LABEL, "Local Port:%d is in stall state",
2013 recvport);
2014 RDS_INCR_EWOULDBLOCK();
2015 return (ENOMEM);
2016 }
2017 ret = rds_deliver_loopback_msg(uiop, recvip, sendip, recvport,
2018 sendport, zoneid);
2019 return (ret);
2020 }
2021
2022 /* Not a loopback message */
2023 if (sp == NULL) {
2024 /* There is no session to the destination, create one. */
2025 RDS_DPRINTF3(LABEL, "There is no session to the destination "
2026 "IP: 0x%x", recvip);
2027 sp = rds_session_create(rdsib_statep, sendip, recvip, NULL,
2028 RDS_SESSION_ACTIVE);
2029 if (sp != NULL) {
2030 rw_enter(&sp->session_lock, RW_WRITER);
2031 if (sp->session_type == RDS_SESSION_ACTIVE) {
2032 ret = rds_session_init(sp);
2033 if (ret != 0) {
2034 RDS_DPRINTF2("rds_sendmsg",
2035 "SP(%p): rds_session_init failed",
2036 sp);
2037 sp->session_state =
2038 RDS_SESSION_STATE_FAILED;
2039 RDS_DPRINTF3("rds_sendmsg",
2040 "SP(%p) State "
2041 "RDS_SESSION_STATE_FAILED", sp);
2042 rw_exit(&sp->session_lock);
2043 return (EFAULT);
2044 }
2045 sp->session_state = RDS_SESSION_STATE_INIT;
2046 RDS_DPRINTF3("rds_sendmsg",
2047 "SP(%p) State "
2048 "RDS_SESSION_STATE_INIT", sp);
2049 rw_exit(&sp->session_lock);
2050 rds_session_open(sp);
2051 } else {
2052 rw_exit(&sp->session_lock);
2053 }
2054 } else {
2055 /* Is a session created for this destination */
2056 rw_enter(&rdsib_statep->rds_sessionlock, RW_READER);
2057 sp = rds_session_lkup(rdsib_statep, recvip, 0);
2058 rw_exit(&rdsib_statep->rds_sessionlock);
2059 if (sp == NULL) {
2060 return (EFAULT);
2061 }
2062 }
2063 }
2064
2065 /* There is a session to the destination */
2066 rw_enter(&sp->session_lock, RW_READER);
2067 if (sp->session_state == RDS_SESSION_STATE_CONNECTED) {
2068 rw_exit(&sp->session_lock);
2069
2070 ret = rds_ep_sendmsg(&sp->session_dataep, uiop, sendport,
2071 recvport);
2072 return (ret);
2073 } else if ((sp->session_state == RDS_SESSION_STATE_FAILED) ||
2074 (sp->session_state == RDS_SESSION_STATE_FINI)) {
2075 ipaddr_t sendip1, recvip1;
2076
2077 RDS_DPRINTF3("rds_sendmsg", "SP(%p) is not connected, State: "
2078 "%d", sp, sp->session_state);
2079 rw_exit(&sp->session_lock);
2080 rw_enter(&sp->session_lock, RW_WRITER);
2081 if ((sp->session_state == RDS_SESSION_STATE_FAILED) ||
2082 (sp->session_state == RDS_SESSION_STATE_FINI)) {
2083 ibt_ip_path_attr_t ipattr;
2084 ibt_ip_addr_t dstip;
2085
2086 sp->session_state = RDS_SESSION_STATE_CREATED;
2087 sp->session_type = RDS_SESSION_ACTIVE;
2088 RDS_DPRINTF3("rds_sendmsg", "SP(%p) State "
2089 "RDS_SESSION_STATE_CREATED", sp);
2090 rw_exit(&sp->session_lock);
2091
2092
2093 /* The ipaddr should be in the network order */
2094 sendip1 = sendip;
2095 recvip1 = recvip;
2096 ret = rds_sc_path_lookup(&sendip1, &recvip1);
2097 if (ret == 0) {
2098 RDS_DPRINTF2(LABEL, "Path not found "
2099 "(0x%x 0x%x)", sendip1, recvip1);
2100 }
2101
2102 /* Resolve the IP addresses */
2103 lgid.gid_prefix = 0;
2104 lgid.gid_guid = 0;
2105 rgid.gid_prefix = 0;
2106 rgid.gid_guid = 0;
2107
2108 bzero(&ipattr, sizeof (ibt_ip_path_attr_t));
2109 dstip.family = AF_INET;
2110 dstip.un.ip4addr = recvip1;
2111 ipattr.ipa_dst_ip = &dstip;
2112 ipattr.ipa_src_ip.family = AF_INET;
2113 ipattr.ipa_src_ip.un.ip4addr = sendip1;
2114 ipattr.ipa_ndst = 1;
2115 ipattr.ipa_max_paths = 1;
2116 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths: 0x%x <-> 0x%x ",
2117 sendip1, recvip1);
2118 ret = ibt_get_ip_paths(rdsib_statep->rds_ibhdl,
2119 IBT_PATH_NO_FLAGS, &ipattr, &sp->session_pinfo,
2120 NULL, NULL);
2121 if (ret != IBT_SUCCESS) {
2122 RDS_DPRINTF2("rds_sendmsg",
2123 "ibt_get_ip_paths failed, ret: %d ", ret);
2124
2125 rw_enter(&sp->session_lock, RW_WRITER);
2126 if (sp->session_type == RDS_SESSION_ACTIVE) {
2127 sp->session_state =
2128 RDS_SESSION_STATE_FAILED;
2129 RDS_DPRINTF3("rds_sendmsg",
2130 "SP(%p) State "
2131 "RDS_SESSION_STATE_FAILED", sp);
2132 rw_exit(&sp->session_lock);
2133 return (EFAULT);
2134 } else {
2135 rw_exit(&sp->session_lock);
2136 return (ENOMEM);
2137 }
2138 }
2139 RDS_DPRINTF2(LABEL, "ibt_get_ip_paths success");
2140 lgid = sp->session_pinfo.
2141 pi_prim_cep_path.cep_adds_vect.av_sgid;
2142 rgid = sp->session_pinfo.
2143 pi_prim_cep_path.cep_adds_vect.av_dgid;
2144
2145 RDS_DPRINTF2(LABEL, "lgid: %llx:%llx rgid: %llx:%llx",
2146 lgid.gid_prefix, lgid.gid_guid, rgid.gid_prefix,
2147 rgid.gid_guid);
2148
2149 rw_enter(&sp->session_lock, RW_WRITER);
2150 if (sp->session_type == RDS_SESSION_ACTIVE) {
2151 sp->session_lgid = lgid;
2152 sp->session_rgid = rgid;
2153 ret = rds_session_init(sp);
2154 if (ret != 0) {
2155 RDS_DPRINTF2("rds_sendmsg",
2156 "SP(%p): rds_session_init failed",
2157 sp);
2158 sp->session_state =
2159 RDS_SESSION_STATE_FAILED;
2160 RDS_DPRINTF3("rds_sendmsg",
2161 "SP(%p) State "
2162 "RDS_SESSION_STATE_FAILED", sp);
2163 rw_exit(&sp->session_lock);
2164 return (EFAULT);
2165 }
2166 sp->session_state = RDS_SESSION_STATE_INIT;
2167 rw_exit(&sp->session_lock);
2168
2169 rds_session_open(sp);
2170
2171 } else {
2172 RDS_DPRINTF2("rds_sendmsg",
2173 "SP(%p): type changed to %d",
2174 sp, sp->session_type);
2175 rw_exit(&sp->session_lock);
2176 return (ENOMEM);
2177 }
2178 } else {
2179 RDS_DPRINTF2("rds_sendmsg",
2180 "SP(%p): Session state %d changed",
2181 sp, sp->session_state);
2182 rw_exit(&sp->session_lock);
2183 return (ENOMEM);
2184 }
2185 } else {
2186 RDS_DPRINTF4("rds_sendmsg", "SP(%p): Session is in %d state",
2187 sp, sp->session_state);
2188 rw_exit(&sp->session_lock);
2189 return (ENOMEM);
2190 }
2191
2192 rw_enter(&sp->session_lock, RW_READER);
2193 if (sp->session_state == RDS_SESSION_STATE_CONNECTED) {
2194 rw_exit(&sp->session_lock);
2195
2196 ret = rds_ep_sendmsg(&sp->session_dataep, uiop, sendport,
2197 recvport);
2198 } else {
2199 RDS_DPRINTF2("rds_sendmsg", "SP(%p): state(%d) not connected",
2200 sp, sp->session_state);
2201 rw_exit(&sp->session_lock);
2202 }
2203
2204 RDS_DPRINTF4("rds_sendmsg", "Return: SP(%p) ret: %d", sp, ret);
2205
2206 return (ret);
2207 }
2208
2209 /* Note: This is called on the CQ handler thread */
2210 void
rds_received_msg(rds_ep_t * ep,rds_buf_t * bp)2211 rds_received_msg(rds_ep_t *ep, rds_buf_t *bp)
2212 {
2213 mblk_t *mp, *mp1;
2214 rds_data_hdr_t *pktp, *pktp1;
2215 uint8_t *datap;
2216 rds_buf_t *bp1;
2217 rds_bufpool_t *rpool;
2218 uint_t npkts, ix;
2219 int ret;
2220
2221 RDS_DPRINTF4("rds_received_msg", "Enter: EP(%p)", ep);
2222
2223 pktp = (rds_data_hdr_t *)(uintptr_t)bp->buf_ds.ds_va;
2224 datap = ((uint8_t *)(uintptr_t)bp->buf_ds.ds_va) + RDS_DATA_HDR_SZ;
2225 npkts = pktp->dh_npkts;
2226
2227 /* increment rx pending here */
2228 rpool = &ep->ep_rcvpool;
2229 mutex_enter(&rpool->pool_lock);
2230 rpool->pool_nbusy += npkts;
2231 mutex_exit(&rpool->pool_lock);
2232
2233 /* this will get freed by sockfs */
2234 mp = esballoc(datap, pktp->dh_datalen, BPRI_HI, &bp->buf_frtn);
2235 if (mp == NULL) {
2236 RDS_DPRINTF2(LABEL, "EP(%p) BP(%p): allocb failed",
2237 ep, bp);
2238 rds_free_recv_buf(bp, npkts);
2239 return;
2240 }
2241 mp->b_wptr = datap + pktp->dh_datalen;
2242 mp->b_datap->db_type = M_DATA;
2243
2244 mp1 = mp;
2245 bp1 = bp->buf_nextp;
2246 while (bp1 != NULL) {
2247 pktp1 = (rds_data_hdr_t *)(uintptr_t)bp1->buf_ds.ds_va;
2248 datap = ((uint8_t *)(uintptr_t)bp1->buf_ds.ds_va) +
2249 RDS_DATA_HDR_SZ;
2250
2251 mp1->b_cont = esballoc(datap, pktp1->dh_datalen,
2252 BPRI_HI, &bp1->buf_frtn);
2253 if (mp1->b_cont == NULL) {
2254 RDS_DPRINTF2(LABEL, "EP(%p) BP(%p): allocb failed",
2255 ep, bp1);
2256 freemsg(mp);
2257 rds_free_recv_buf(bp1, pktp1->dh_npkts);
2258 return;
2259 }
2260 mp1 = mp1->b_cont;
2261 mp1->b_wptr = datap + pktp1->dh_datalen;
2262 mp1->b_datap->db_type = M_DATA;
2263
2264 bp1 = bp1->buf_nextp;
2265 }
2266
2267 RDS_INCR_RXPKTS_PEND(npkts);
2268 RDS_INCR_RXPKTS(npkts);
2269 RDS_INCR_RXBYTES(msgdsize(mp));
2270
2271 RDS_DPRINTF5(LABEL, "Deliver Message: sendIP: 0x%x recvIP: 0x%x "
2272 "sendport: %d recvport: %d npkts: %d pktno: %d", ep->ep_remip,
2273 ep->ep_myip, pktp->dh_sendport, pktp->dh_recvport,
2274 npkts, pktp->dh_psn);
2275
2276 /* store the last buffer id, no lock needed */
2277 if (npkts > 1) {
2278 ep->ep_rbufid = pktp1->dh_bufid;
2279 } else {
2280 ep->ep_rbufid = pktp->dh_bufid;
2281 }
2282
2283 ret = rds_deliver_new_msg(mp, ep->ep_myip, ep->ep_remip,
2284 pktp->dh_recvport, pktp->dh_sendport, ALL_ZONES);
2285 if (ret != 0) {
2286 if (ret == ENOSPC) {
2287 /*
2288 * The message is delivered but cannot take more,
2289 * stop further remote messages coming to this port
2290 */
2291 RDS_DPRINTF3("rds_received_msg", "Port %d NO SPACE",
2292 pktp->dh_recvport);
2293 rds_stall_port(ep->ep_sp, pktp->dh_recvport, RDS_LOCAL);
2294 } else {
2295 RDS_DPRINTF2(LABEL, "rds_deliver_new_msg returned: %d",
2296 ret);
2297 }
2298 }
2299
2300 mutex_enter(&ep->ep_lock);
2301 /* The first message can come in before the conn est event */
2302 if ((ep->ep_rdmacnt == 0) && (ep->ep_state == RDS_EP_STATE_CONNECTED)) {
2303 ep->ep_rdmacnt++;
2304 *(uintptr_t *)(uintptr_t)ep->ep_ackds.ds_va = ep->ep_rbufid;
2305 mutex_exit(&ep->ep_lock);
2306
2307 /* send acknowledgement */
2308 RDS_INCR_TXACKS();
2309 ret = ibt_post_send(ep->ep_chanhdl, &ep->ep_ackwr, 1, &ix);
2310 if (ret != IBT_SUCCESS) {
2311 RDS_DPRINTF2(LABEL, "EP(%p): ibt_post_send for "
2312 "acknowledgement failed: %d, SQ depth: %d",
2313 ep, ret, ep->ep_sndpool.pool_nbusy);
2314 mutex_enter(&ep->ep_lock);
2315 ep->ep_rdmacnt--;
2316 mutex_exit(&ep->ep_lock);
2317 }
2318 } else {
2319 /* no room to send acknowledgement */
2320 mutex_exit(&ep->ep_lock);
2321 }
2322
2323 RDS_DPRINTF4("rds_received_msg", "Return: EP(%p)", ep);
2324 }
2325