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51#include <linux/module.h>
52#include <linux/slab.h>
53#include <linux/seq_file.h>
54#include <linux/sunrpc/addr.h>
55
56#include "xprt_rdma.h"
57
58#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
59# define RPCDBG_FACILITY RPCDBG_TRANS
60#endif
61
62
63
64
65
66static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE;
67unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
68static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
69unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRWR;
70int xprt_rdma_pad_optimize;
71
72#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
73
74static unsigned int min_slot_table_size = RPCRDMA_MIN_SLOT_TABLE;
75static unsigned int max_slot_table_size = RPCRDMA_MAX_SLOT_TABLE;
76static unsigned int min_inline_size = RPCRDMA_MIN_INLINE;
77static unsigned int max_inline_size = RPCRDMA_MAX_INLINE;
78static unsigned int zero;
79static unsigned int max_padding = PAGE_SIZE;
80static unsigned int min_memreg = RPCRDMA_BOUNCEBUFFERS;
81static unsigned int max_memreg = RPCRDMA_LAST - 1;
82static unsigned int dummy;
83
84static struct ctl_table_header *sunrpc_table_header;
85
86static struct ctl_table xr_tunables_table[] = {
87 {
88 .procname = "rdma_slot_table_entries",
89 .data = &xprt_rdma_slot_table_entries,
90 .maxlen = sizeof(unsigned int),
91 .mode = 0644,
92 .proc_handler = proc_dointvec_minmax,
93 .extra1 = &min_slot_table_size,
94 .extra2 = &max_slot_table_size
95 },
96 {
97 .procname = "rdma_max_inline_read",
98 .data = &xprt_rdma_max_inline_read,
99 .maxlen = sizeof(unsigned int),
100 .mode = 0644,
101 .proc_handler = proc_dointvec_minmax,
102 .extra1 = &min_inline_size,
103 .extra2 = &max_inline_size,
104 },
105 {
106 .procname = "rdma_max_inline_write",
107 .data = &xprt_rdma_max_inline_write,
108 .maxlen = sizeof(unsigned int),
109 .mode = 0644,
110 .proc_handler = proc_dointvec_minmax,
111 .extra1 = &min_inline_size,
112 .extra2 = &max_inline_size,
113 },
114 {
115 .procname = "rdma_inline_write_padding",
116 .data = &dummy,
117 .maxlen = sizeof(unsigned int),
118 .mode = 0644,
119 .proc_handler = proc_dointvec_minmax,
120 .extra1 = &zero,
121 .extra2 = &max_padding,
122 },
123 {
124 .procname = "rdma_memreg_strategy",
125 .data = &xprt_rdma_memreg_strategy,
126 .maxlen = sizeof(unsigned int),
127 .mode = 0644,
128 .proc_handler = proc_dointvec_minmax,
129 .extra1 = &min_memreg,
130 .extra2 = &max_memreg,
131 },
132 {
133 .procname = "rdma_pad_optimize",
134 .data = &xprt_rdma_pad_optimize,
135 .maxlen = sizeof(unsigned int),
136 .mode = 0644,
137 .proc_handler = proc_dointvec,
138 },
139 { },
140};
141
142static struct ctl_table sunrpc_table[] = {
143 {
144 .procname = "sunrpc",
145 .mode = 0555,
146 .child = xr_tunables_table
147 },
148 { },
149};
150
151#endif
152
153static const struct rpc_xprt_ops xprt_rdma_procs;
154
155static void
156xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap)
157{
158 struct sockaddr_in *sin = (struct sockaddr_in *)sap;
159 char buf[20];
160
161 snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr));
162 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
163
164 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA;
165}
166
167static void
168xprt_rdma_format_addresses6(struct rpc_xprt *xprt, struct sockaddr *sap)
169{
170 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
171 char buf[40];
172
173 snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
174 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
175
176 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA6;
177}
178
179void
180xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap)
181{
182 char buf[128];
183
184 switch (sap->sa_family) {
185 case AF_INET:
186 xprt_rdma_format_addresses4(xprt, sap);
187 break;
188 case AF_INET6:
189 xprt_rdma_format_addresses6(xprt, sap);
190 break;
191 default:
192 pr_err("rpcrdma: Unrecognized address family\n");
193 return;
194 }
195
196 (void)rpc_ntop(sap, buf, sizeof(buf));
197 xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL);
198
199 snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
200 xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
201
202 snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
203 xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
204
205 xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma";
206}
207
208void
209xprt_rdma_free_addresses(struct rpc_xprt *xprt)
210{
211 unsigned int i;
212
213 for (i = 0; i < RPC_DISPLAY_MAX; i++)
214 switch (i) {
215 case RPC_DISPLAY_PROTO:
216 case RPC_DISPLAY_NETID:
217 continue;
218 default:
219 kfree(xprt->address_strings[i]);
220 }
221}
222
223void
224rpcrdma_conn_func(struct rpcrdma_ep *ep)
225{
226 schedule_delayed_work(&ep->rep_connect_worker, 0);
227}
228
229void
230rpcrdma_connect_worker(struct work_struct *work)
231{
232 struct rpcrdma_ep *ep =
233 container_of(work, struct rpcrdma_ep, rep_connect_worker.work);
234 struct rpcrdma_xprt *r_xprt =
235 container_of(ep, struct rpcrdma_xprt, rx_ep);
236 struct rpc_xprt *xprt = &r_xprt->rx_xprt;
237
238 spin_lock_bh(&xprt->transport_lock);
239 if (ep->rep_connected > 0) {
240 if (!xprt_test_and_set_connected(xprt))
241 xprt_wake_pending_tasks(xprt, 0);
242 } else {
243 if (xprt_test_and_clear_connected(xprt))
244 xprt_wake_pending_tasks(xprt, -ENOTCONN);
245 }
246 spin_unlock_bh(&xprt->transport_lock);
247}
248
249static void
250xprt_rdma_connect_worker(struct work_struct *work)
251{
252 struct rpcrdma_xprt *r_xprt = container_of(work, struct rpcrdma_xprt,
253 rx_connect_worker.work);
254 struct rpc_xprt *xprt = &r_xprt->rx_xprt;
255 int rc = 0;
256
257 xprt_clear_connected(xprt);
258
259 rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia);
260 if (rc)
261 xprt_wake_pending_tasks(xprt, rc);
262
263 xprt_clear_connecting(xprt);
264}
265
266static void
267xprt_rdma_inject_disconnect(struct rpc_xprt *xprt)
268{
269 struct rpcrdma_xprt *r_xprt = container_of(xprt, struct rpcrdma_xprt,
270 rx_xprt);
271
272 trace_xprtrdma_inject_dsc(r_xprt);
273 rdma_disconnect(r_xprt->rx_ia.ri_id);
274}
275
276
277
278
279
280
281
282
283
284
285
286
287static void
288xprt_rdma_destroy(struct rpc_xprt *xprt)
289{
290 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
291
292 trace_xprtrdma_destroy(r_xprt);
293
294 cancel_delayed_work_sync(&r_xprt->rx_connect_worker);
295
296 xprt_clear_connected(xprt);
297
298 rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia);
299 rpcrdma_buffer_destroy(&r_xprt->rx_buf);
300 rpcrdma_ia_close(&r_xprt->rx_ia);
301
302 xprt_rdma_free_addresses(xprt);
303 xprt_free(xprt);
304
305 module_put(THIS_MODULE);
306}
307
308static const struct rpc_timeout xprt_rdma_default_timeout = {
309 .to_initval = 60 * HZ,
310 .to_maxval = 60 * HZ,
311};
312
313
314
315
316
317
318static struct rpc_xprt *
319xprt_setup_rdma(struct xprt_create *args)
320{
321 struct rpcrdma_create_data_internal cdata;
322 struct rpc_xprt *xprt;
323 struct rpcrdma_xprt *new_xprt;
324 struct rpcrdma_ep *new_ep;
325 struct sockaddr *sap;
326 int rc;
327
328 if (args->addrlen > sizeof(xprt->addr)) {
329 dprintk("RPC: %s: address too large\n", __func__);
330 return ERR_PTR(-EBADF);
331 }
332
333 xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt),
334 xprt_rdma_slot_table_entries,
335 xprt_rdma_slot_table_entries);
336 if (xprt == NULL) {
337 dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n",
338 __func__);
339 return ERR_PTR(-ENOMEM);
340 }
341
342
343 xprt->timeout = &xprt_rdma_default_timeout;
344 xprt->bind_timeout = RPCRDMA_BIND_TO;
345 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
346 xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO;
347
348 xprt->resvport = 0;
349 xprt->tsh_size = 0;
350 xprt->ops = &xprt_rdma_procs;
351
352
353
354
355 sap = args->dstaddr;
356
357
358
359 xprt->prot = IPPROTO_TCP;
360 xprt->addrlen = args->addrlen;
361 memcpy(&xprt->addr, sap, xprt->addrlen);
362
363 if (rpc_get_port(sap))
364 xprt_set_bound(xprt);
365 xprt_rdma_format_addresses(xprt, sap);
366
367 cdata.max_requests = xprt->max_reqs;
368
369 cdata.rsize = RPCRDMA_MAX_SEGS * PAGE_SIZE;
370 cdata.wsize = RPCRDMA_MAX_SEGS * PAGE_SIZE;
371
372 cdata.inline_wsize = xprt_rdma_max_inline_write;
373 if (cdata.inline_wsize > cdata.wsize)
374 cdata.inline_wsize = cdata.wsize;
375
376 cdata.inline_rsize = xprt_rdma_max_inline_read;
377 if (cdata.inline_rsize > cdata.rsize)
378 cdata.inline_rsize = cdata.rsize;
379
380
381
382
383
384
385
386
387 new_xprt = rpcx_to_rdmax(xprt);
388
389 rc = rpcrdma_ia_open(new_xprt);
390 if (rc)
391 goto out1;
392
393
394
395
396 new_xprt->rx_data = cdata;
397 new_ep = &new_xprt->rx_ep;
398
399 rc = rpcrdma_ep_create(&new_xprt->rx_ep,
400 &new_xprt->rx_ia, &new_xprt->rx_data);
401 if (rc)
402 goto out2;
403
404 rc = rpcrdma_buffer_create(new_xprt);
405 if (rc)
406 goto out3;
407
408 INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
409 xprt_rdma_connect_worker);
410
411 xprt->max_payload = new_xprt->rx_ia.ri_ops->ro_maxpages(new_xprt);
412 if (xprt->max_payload == 0)
413 goto out4;
414 xprt->max_payload <<= PAGE_SHIFT;
415 dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
416 __func__, xprt->max_payload);
417
418 if (!try_module_get(THIS_MODULE))
419 goto out4;
420
421 dprintk("RPC: %s: %s:%s\n", __func__,
422 xprt->address_strings[RPC_DISPLAY_ADDR],
423 xprt->address_strings[RPC_DISPLAY_PORT]);
424 trace_xprtrdma_create(new_xprt);
425 return xprt;
426
427out4:
428 rpcrdma_buffer_destroy(&new_xprt->rx_buf);
429 rc = -ENODEV;
430out3:
431 rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia);
432out2:
433 rpcrdma_ia_close(&new_xprt->rx_ia);
434out1:
435 trace_xprtrdma_destroy(new_xprt);
436 xprt_rdma_free_addresses(xprt);
437 xprt_free(xprt);
438 return ERR_PTR(rc);
439}
440
441
442
443
444
445
446
447
448static void
449xprt_rdma_close(struct rpc_xprt *xprt)
450{
451 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
452 struct rpcrdma_ep *ep = &r_xprt->rx_ep;
453 struct rpcrdma_ia *ia = &r_xprt->rx_ia;
454
455 dprintk("RPC: %s: closing xprt %p\n", __func__, xprt);
456
457 if (test_and_clear_bit(RPCRDMA_IAF_REMOVING, &ia->ri_flags)) {
458 xprt_clear_connected(xprt);
459 rpcrdma_ia_remove(ia);
460 return;
461 }
462 if (ep->rep_connected == -ENODEV)
463 return;
464 if (ep->rep_connected > 0)
465 xprt->reestablish_timeout = 0;
466 xprt_disconnect_done(xprt);
467 rpcrdma_ep_disconnect(ep, ia);
468}
469
470
471
472
473
474
475
476
477static void
478xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port)
479{
480 struct sockaddr *sap = (struct sockaddr *)&xprt->addr;
481 char buf[8];
482
483 dprintk("RPC: %s: setting port for xprt %p (%s:%s) to %u\n",
484 __func__, xprt,
485 xprt->address_strings[RPC_DISPLAY_ADDR],
486 xprt->address_strings[RPC_DISPLAY_PORT],
487 port);
488
489 rpc_set_port(sap, port);
490
491 kfree(xprt->address_strings[RPC_DISPLAY_PORT]);
492 snprintf(buf, sizeof(buf), "%u", port);
493 xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
494
495 kfree(xprt->address_strings[RPC_DISPLAY_HEX_PORT]);
496 snprintf(buf, sizeof(buf), "%4hx", port);
497 xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
498}
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513static void
514xprt_rdma_timer(struct rpc_xprt *xprt, struct rpc_task *task)
515{
516 xprt_force_disconnect(xprt);
517}
518
519static void
520xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task)
521{
522 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
523
524 if (r_xprt->rx_ep.rep_connected != 0) {
525
526 schedule_delayed_work(&r_xprt->rx_connect_worker,
527 xprt->reestablish_timeout);
528 xprt->reestablish_timeout <<= 1;
529 if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO)
530 xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO;
531 else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO)
532 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
533 } else {
534 schedule_delayed_work(&r_xprt->rx_connect_worker, 0);
535 if (!RPC_IS_ASYNC(task))
536 flush_delayed_work(&r_xprt->rx_connect_worker);
537 }
538}
539
540static bool
541rpcrdma_get_sendbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
542 size_t size, gfp_t flags)
543{
544 struct rpcrdma_regbuf *rb;
545
546 if (req->rl_sendbuf && rdmab_length(req->rl_sendbuf) >= size)
547 return true;
548
549 rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, flags);
550 if (IS_ERR(rb))
551 return false;
552
553 rpcrdma_free_regbuf(req->rl_sendbuf);
554 r_xprt->rx_stats.hardway_register_count += size;
555 req->rl_sendbuf = rb;
556 return true;
557}
558
559
560
561
562
563
564
565
566
567
568
569
570static bool
571rpcrdma_get_recvbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
572 size_t size, gfp_t flags)
573{
574 struct rpcrdma_regbuf *rb;
575
576 if (req->rl_recvbuf && rdmab_length(req->rl_recvbuf) >= size)
577 return true;
578
579 rb = rpcrdma_alloc_regbuf(size, DMA_NONE, flags);
580 if (IS_ERR(rb))
581 return false;
582
583 rpcrdma_free_regbuf(req->rl_recvbuf);
584 r_xprt->rx_stats.hardway_register_count += size;
585 req->rl_recvbuf = rb;
586 return true;
587}
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605static int
606xprt_rdma_allocate(struct rpc_task *task)
607{
608 struct rpc_rqst *rqst = task->tk_rqstp;
609 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
610 struct rpcrdma_req *req;
611 gfp_t flags;
612
613 req = rpcrdma_buffer_get(&r_xprt->rx_buf);
614 if (req == NULL)
615 goto out_get;
616
617 flags = RPCRDMA_DEF_GFP;
618 if (RPC_IS_SWAPPER(task))
619 flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN;
620
621 if (!rpcrdma_get_sendbuf(r_xprt, req, rqst->rq_callsize, flags))
622 goto out_fail;
623 if (!rpcrdma_get_recvbuf(r_xprt, req, rqst->rq_rcvsize, flags))
624 goto out_fail;
625
626 rpcrdma_set_xprtdata(rqst, req);
627 rqst->rq_buffer = req->rl_sendbuf->rg_base;
628 rqst->rq_rbuffer = req->rl_recvbuf->rg_base;
629 trace_xprtrdma_allocate(task, req);
630 return 0;
631
632out_fail:
633 rpcrdma_buffer_put(req);
634out_get:
635 trace_xprtrdma_allocate(task, NULL);
636 return -ENOMEM;
637}
638
639
640
641
642
643
644
645static void
646xprt_rdma_free(struct rpc_task *task)
647{
648 struct rpc_rqst *rqst = task->tk_rqstp;
649 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
650 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
651
652 if (test_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags))
653 rpcrdma_release_rqst(r_xprt, req);
654 trace_xprtrdma_rpc_done(task, req);
655 rpcrdma_buffer_put(req);
656}
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672static int
673xprt_rdma_send_request(struct rpc_task *task)
674{
675 struct rpc_rqst *rqst = task->tk_rqstp;
676 struct rpc_xprt *xprt = rqst->rq_xprt;
677 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
678 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
679 int rc = 0;
680
681#if defined(CONFIG_SUNRPC_BACKCHANNEL)
682 if (unlikely(!rqst->rq_buffer))
683 return xprt_rdma_bc_send_reply(rqst);
684#endif
685
686 if (!xprt_connected(xprt))
687 goto drop_connection;
688
689 rc = rpcrdma_marshal_req(r_xprt, rqst);
690 if (rc < 0)
691 goto failed_marshal;
692
693 if (req->rl_reply == NULL)
694 rpcrdma_recv_buffer_get(req);
695
696
697 if (rqst->rq_connect_cookie == xprt->connect_cookie)
698 goto drop_connection;
699 rqst->rq_xtime = ktime_get();
700
701 __set_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags);
702 if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
703 goto drop_connection;
704
705 rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len;
706 rqst->rq_bytes_sent = 0;
707
708
709
710
711 if (!rpc_reply_expected(task))
712 goto drop_connection;
713 return 0;
714
715failed_marshal:
716 if (rc != -ENOTCONN)
717 return rc;
718drop_connection:
719 xprt_disconnect_done(xprt);
720 return -ENOTCONN;
721}
722
723void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
724{
725 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
726 long idle_time = 0;
727
728 if (xprt_connected(xprt))
729 idle_time = (long)(jiffies - xprt->last_used) / HZ;
730
731 seq_puts(seq, "\txprt:\trdma ");
732 seq_printf(seq, "%u %lu %lu %lu %ld %lu %lu %lu %llu %llu ",
733 0,
734 xprt->stat.bind_count,
735 xprt->stat.connect_count,
736 xprt->stat.connect_time,
737 idle_time,
738 xprt->stat.sends,
739 xprt->stat.recvs,
740 xprt->stat.bad_xids,
741 xprt->stat.req_u,
742 xprt->stat.bklog_u);
743 seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu %lu ",
744 r_xprt->rx_stats.read_chunk_count,
745 r_xprt->rx_stats.write_chunk_count,
746 r_xprt->rx_stats.reply_chunk_count,
747 r_xprt->rx_stats.total_rdma_request,
748 r_xprt->rx_stats.total_rdma_reply,
749 r_xprt->rx_stats.pullup_copy_count,
750 r_xprt->rx_stats.fixup_copy_count,
751 r_xprt->rx_stats.hardway_register_count,
752 r_xprt->rx_stats.failed_marshal_count,
753 r_xprt->rx_stats.bad_reply_count,
754 r_xprt->rx_stats.nomsg_call_count);
755 seq_printf(seq, "%lu %lu %lu %lu %lu %lu\n",
756 r_xprt->rx_stats.mrs_recovered,
757 r_xprt->rx_stats.mrs_orphaned,
758 r_xprt->rx_stats.mrs_allocated,
759 r_xprt->rx_stats.local_inv_needed,
760 r_xprt->rx_stats.empty_sendctx_q,
761 r_xprt->rx_stats.reply_waits_for_send);
762}
763
764static int
765xprt_rdma_enable_swap(struct rpc_xprt *xprt)
766{
767 return 0;
768}
769
770static void
771xprt_rdma_disable_swap(struct rpc_xprt *xprt)
772{
773}
774
775
776
777
778
779static const struct rpc_xprt_ops xprt_rdma_procs = {
780 .reserve_xprt = xprt_reserve_xprt_cong,
781 .release_xprt = xprt_release_xprt_cong,
782 .alloc_slot = xprt_alloc_slot,
783 .release_request = xprt_release_rqst_cong,
784 .set_retrans_timeout = xprt_set_retrans_timeout_def,
785 .timer = xprt_rdma_timer,
786 .rpcbind = rpcb_getport_async,
787 .set_port = xprt_rdma_set_port,
788 .connect = xprt_rdma_connect,
789 .buf_alloc = xprt_rdma_allocate,
790 .buf_free = xprt_rdma_free,
791 .send_request = xprt_rdma_send_request,
792 .close = xprt_rdma_close,
793 .destroy = xprt_rdma_destroy,
794 .print_stats = xprt_rdma_print_stats,
795 .enable_swap = xprt_rdma_enable_swap,
796 .disable_swap = xprt_rdma_disable_swap,
797 .inject_disconnect = xprt_rdma_inject_disconnect,
798#if defined(CONFIG_SUNRPC_BACKCHANNEL)
799 .bc_setup = xprt_rdma_bc_setup,
800 .bc_up = xprt_rdma_bc_up,
801 .bc_maxpayload = xprt_rdma_bc_maxpayload,
802 .bc_free_rqst = xprt_rdma_bc_free_rqst,
803 .bc_destroy = xprt_rdma_bc_destroy,
804#endif
805};
806
807static struct xprt_class xprt_rdma = {
808 .list = LIST_HEAD_INIT(xprt_rdma.list),
809 .name = "rdma",
810 .owner = THIS_MODULE,
811 .ident = XPRT_TRANSPORT_RDMA,
812 .setup = xprt_setup_rdma,
813};
814
815void xprt_rdma_cleanup(void)
816{
817 int rc;
818
819 dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
820#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
821 if (sunrpc_table_header) {
822 unregister_sysctl_table(sunrpc_table_header);
823 sunrpc_table_header = NULL;
824 }
825#endif
826 rc = xprt_unregister_transport(&xprt_rdma);
827 if (rc)
828 dprintk("RPC: %s: xprt_unregister returned %i\n",
829 __func__, rc);
830
831 rpcrdma_destroy_wq();
832
833 rc = xprt_unregister_transport(&xprt_rdma_bc);
834 if (rc)
835 dprintk("RPC: %s: xprt_unregister(bc) returned %i\n",
836 __func__, rc);
837}
838
839int xprt_rdma_init(void)
840{
841 int rc;
842
843 rc = rpcrdma_alloc_wq();
844 if (rc)
845 return rc;
846
847 rc = xprt_register_transport(&xprt_rdma);
848 if (rc) {
849 rpcrdma_destroy_wq();
850 return rc;
851 }
852
853 rc = xprt_register_transport(&xprt_rdma_bc);
854 if (rc) {
855 xprt_unregister_transport(&xprt_rdma);
856 rpcrdma_destroy_wq();
857 return rc;
858 }
859
860 dprintk("RPCRDMA Module Init, register RPC RDMA transport\n");
861
862 dprintk("Defaults:\n");
863 dprintk("\tSlots %d\n"
864 "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n",
865 xprt_rdma_slot_table_entries,
866 xprt_rdma_max_inline_read, xprt_rdma_max_inline_write);
867 dprintk("\tPadding 0\n\tMemreg %d\n", xprt_rdma_memreg_strategy);
868
869#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
870 if (!sunrpc_table_header)
871 sunrpc_table_header = register_sysctl_table(sunrpc_table);
872#endif
873 return 0;
874}
875