1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
3 * Copyright (c) 2014-2017 Oracle. All rights reserved.
4 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
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39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 * This file contains the top-level implementation of an RPC RDMA
48 * Naming convention: functions beginning with xprt_ are part of the
49 * transport switch. All others are RPC RDMA internal.
52 #include <linux/module.h>
53 #include <linux/slab.h>
54 #include <linux/seq_file.h>
55 #include <linux/smp.h>
57 #include <linux/sunrpc/addr.h>
58 #include <linux/sunrpc/svc_rdma.h>
60 #include "xprt_rdma.h"
61 #include <trace/events/rpcrdma.h>
63 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
64 # define RPCDBG_FACILITY RPCDBG_TRANS
71 unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE;
72 unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
73 unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
74 unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRWR;
75 int xprt_rdma_pad_optimize;
77 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
79 static unsigned int min_slot_table_size = RPCRDMA_MIN_SLOT_TABLE;
80 static unsigned int max_slot_table_size = RPCRDMA_MAX_SLOT_TABLE;
81 static unsigned int min_inline_size = RPCRDMA_MIN_INLINE;
82 static unsigned int max_inline_size = RPCRDMA_MAX_INLINE;
83 static unsigned int zero;
84 static unsigned int max_padding = PAGE_SIZE;
85 static unsigned int min_memreg = RPCRDMA_BOUNCEBUFFERS;
86 static unsigned int max_memreg = RPCRDMA_LAST - 1;
87 static unsigned int dummy;
89 static struct ctl_table_header *sunrpc_table_header;
91 static struct ctl_table xr_tunables_table[] = {
93 .procname = "rdma_slot_table_entries",
94 .data = &xprt_rdma_slot_table_entries,
95 .maxlen = sizeof(unsigned int),
97 .proc_handler = proc_dointvec_minmax,
98 .extra1 = &min_slot_table_size,
99 .extra2 = &max_slot_table_size
102 .procname = "rdma_max_inline_read",
103 .data = &xprt_rdma_max_inline_read,
104 .maxlen = sizeof(unsigned int),
106 .proc_handler = proc_dointvec_minmax,
107 .extra1 = &min_inline_size,
108 .extra2 = &max_inline_size,
111 .procname = "rdma_max_inline_write",
112 .data = &xprt_rdma_max_inline_write,
113 .maxlen = sizeof(unsigned int),
115 .proc_handler = proc_dointvec_minmax,
116 .extra1 = &min_inline_size,
117 .extra2 = &max_inline_size,
120 .procname = "rdma_inline_write_padding",
122 .maxlen = sizeof(unsigned int),
124 .proc_handler = proc_dointvec_minmax,
126 .extra2 = &max_padding,
129 .procname = "rdma_memreg_strategy",
130 .data = &xprt_rdma_memreg_strategy,
131 .maxlen = sizeof(unsigned int),
133 .proc_handler = proc_dointvec_minmax,
134 .extra1 = &min_memreg,
135 .extra2 = &max_memreg,
138 .procname = "rdma_pad_optimize",
139 .data = &xprt_rdma_pad_optimize,
140 .maxlen = sizeof(unsigned int),
142 .proc_handler = proc_dointvec,
147 static struct ctl_table sunrpc_table[] = {
149 .procname = "sunrpc",
151 .child = xr_tunables_table
158 static const struct rpc_xprt_ops xprt_rdma_procs;
161 xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap)
163 struct sockaddr_in *sin = (struct sockaddr_in *)sap;
166 snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr));
167 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
169 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA;
173 xprt_rdma_format_addresses6(struct rpc_xprt *xprt, struct sockaddr *sap)
175 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
178 snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
179 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
181 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA6;
185 xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap)
189 switch (sap->sa_family) {
191 xprt_rdma_format_addresses4(xprt, sap);
194 xprt_rdma_format_addresses6(xprt, sap);
197 pr_err("rpcrdma: Unrecognized address family\n");
201 (void)rpc_ntop(sap, buf, sizeof(buf));
202 xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL);
204 snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
205 xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
207 snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
208 xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
210 xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma";
214 xprt_rdma_free_addresses(struct rpc_xprt *xprt)
218 for (i = 0; i < RPC_DISPLAY_MAX; i++)
220 case RPC_DISPLAY_PROTO:
221 case RPC_DISPLAY_NETID:
224 kfree(xprt->address_strings[i]);
229 * xprt_rdma_connect_worker - establish connection in the background
230 * @work: worker thread context
232 * Requester holds the xprt's send lock to prevent activity on this
233 * transport while a fresh connection is being established. RPC tasks
234 * sleep on the xprt's pending queue waiting for connect to complete.
237 xprt_rdma_connect_worker(struct work_struct *work)
239 struct rpcrdma_xprt *r_xprt = container_of(work, struct rpcrdma_xprt,
240 rx_connect_worker.work);
241 struct rpc_xprt *xprt = &r_xprt->rx_xprt;
244 rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia);
245 xprt_clear_connecting(xprt);
246 if (r_xprt->rx_ep.rep_connected > 0) {
247 if (!xprt_test_and_set_connected(xprt)) {
248 xprt->stat.connect_count++;
249 xprt->stat.connect_time += (long)jiffies -
250 xprt->stat.connect_start;
251 xprt_wake_pending_tasks(xprt, -EAGAIN);
254 if (xprt_test_and_clear_connected(xprt))
255 xprt_wake_pending_tasks(xprt, rc);
260 * xprt_rdma_inject_disconnect - inject a connection fault
261 * @xprt: transport context
263 * If @xprt is connected, disconnect it to simulate spurious connection
267 xprt_rdma_inject_disconnect(struct rpc_xprt *xprt)
269 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
271 trace_xprtrdma_op_inject_dsc(r_xprt);
272 rdma_disconnect(r_xprt->rx_ia.ri_id);
276 * xprt_rdma_destroy - Full tear down of transport
277 * @xprt: doomed transport context
279 * Caller guarantees there will be no more calls to us with
283 xprt_rdma_destroy(struct rpc_xprt *xprt)
285 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
287 trace_xprtrdma_op_destroy(r_xprt);
289 cancel_delayed_work_sync(&r_xprt->rx_connect_worker);
291 rpcrdma_ep_destroy(r_xprt);
292 rpcrdma_buffer_destroy(&r_xprt->rx_buf);
293 rpcrdma_ia_close(&r_xprt->rx_ia);
295 xprt_rdma_free_addresses(xprt);
298 module_put(THIS_MODULE);
301 static const struct rpc_timeout xprt_rdma_default_timeout = {
302 .to_initval = 60 * HZ,
303 .to_maxval = 60 * HZ,
307 * xprt_setup_rdma - Set up transport to use RDMA
309 * @args: rpc transport arguments
311 static struct rpc_xprt *
312 xprt_setup_rdma(struct xprt_create *args)
314 struct rpc_xprt *xprt;
315 struct rpcrdma_xprt *new_xprt;
316 struct sockaddr *sap;
319 if (args->addrlen > sizeof(xprt->addr))
320 return ERR_PTR(-EBADF);
322 xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), 0, 0);
324 return ERR_PTR(-ENOMEM);
326 /* 60 second timeout, no retries */
327 xprt->timeout = &xprt_rdma_default_timeout;
328 xprt->bind_timeout = RPCRDMA_BIND_TO;
329 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
330 xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO;
332 xprt->resvport = 0; /* privileged port not needed */
333 xprt->ops = &xprt_rdma_procs;
336 * Set up RDMA-specific connect data.
340 /* Ensure xprt->addr holds valid server TCP (not RDMA)
341 * address, for any side protocols which peek at it */
342 xprt->prot = IPPROTO_TCP;
343 xprt->addrlen = args->addrlen;
344 memcpy(&xprt->addr, sap, xprt->addrlen);
346 if (rpc_get_port(sap))
347 xprt_set_bound(xprt);
348 xprt_rdma_format_addresses(xprt, sap);
350 new_xprt = rpcx_to_rdmax(xprt);
351 rc = rpcrdma_ia_open(new_xprt);
355 rc = rpcrdma_ep_create(new_xprt);
359 rc = rpcrdma_buffer_create(new_xprt);
363 INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
364 xprt_rdma_connect_worker);
366 xprt->max_payload = frwr_maxpages(new_xprt);
367 if (xprt->max_payload == 0)
369 xprt->max_payload <<= PAGE_SHIFT;
370 dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
371 __func__, xprt->max_payload);
373 if (!try_module_get(THIS_MODULE))
376 dprintk("RPC: %s: %s:%s\n", __func__,
377 xprt->address_strings[RPC_DISPLAY_ADDR],
378 xprt->address_strings[RPC_DISPLAY_PORT]);
379 trace_xprtrdma_create(new_xprt);
383 rpcrdma_buffer_destroy(&new_xprt->rx_buf);
386 rpcrdma_ep_destroy(new_xprt);
388 rpcrdma_ia_close(&new_xprt->rx_ia);
390 trace_xprtrdma_op_destroy(new_xprt);
391 xprt_rdma_free_addresses(xprt);
397 * xprt_rdma_close - close a transport connection
398 * @xprt: transport context
400 * Called during autoclose or device removal.
402 * Caller holds @xprt's send lock to prevent activity on this
403 * transport while the connection is torn down.
405 void xprt_rdma_close(struct rpc_xprt *xprt)
407 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
408 struct rpcrdma_ep *ep = &r_xprt->rx_ep;
409 struct rpcrdma_ia *ia = &r_xprt->rx_ia;
413 trace_xprtrdma_op_close(r_xprt);
415 /* Prevent marshaling and sending of new requests */
416 xprt_clear_connected(xprt);
418 if (test_and_clear_bit(RPCRDMA_IAF_REMOVING, &ia->ri_flags)) {
419 rpcrdma_ia_remove(ia);
423 if (ep->rep_connected == -ENODEV)
425 if (ep->rep_connected > 0)
426 xprt->reestablish_timeout = 0;
427 rpcrdma_ep_disconnect(ep, ia);
429 /* Prepare @xprt for the next connection by reinitializing
430 * its credit grant to one (see RFC 8166, Section 3.3.3).
432 r_xprt->rx_buf.rb_credits = 1;
433 xprt->cwnd = RPC_CWNDSHIFT;
436 ++xprt->connect_cookie;
437 xprt_disconnect_done(xprt);
441 * xprt_rdma_set_port - update server port with rpcbind result
442 * @xprt: controlling RPC transport
443 * @port: new port value
445 * Transport connect status is unchanged.
448 xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port)
450 struct sockaddr *sap = (struct sockaddr *)&xprt->addr;
453 dprintk("RPC: %s: setting port for xprt %p (%s:%s) to %u\n",
455 xprt->address_strings[RPC_DISPLAY_ADDR],
456 xprt->address_strings[RPC_DISPLAY_PORT],
459 rpc_set_port(sap, port);
461 kfree(xprt->address_strings[RPC_DISPLAY_PORT]);
462 snprintf(buf, sizeof(buf), "%u", port);
463 xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
465 kfree(xprt->address_strings[RPC_DISPLAY_HEX_PORT]);
466 snprintf(buf, sizeof(buf), "%4hx", port);
467 xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
471 * xprt_rdma_timer - invoked when an RPC times out
472 * @xprt: controlling RPC transport
473 * @task: RPC task that timed out
475 * Invoked when the transport is still connected, but an RPC
476 * retransmit timeout occurs.
478 * Since RDMA connections don't have a keep-alive, forcibly
479 * disconnect and retry to connect. This drives full
480 * detection of the network path, and retransmissions of
484 xprt_rdma_timer(struct rpc_xprt *xprt, struct rpc_task *task)
486 xprt_force_disconnect(xprt);
490 * xprt_rdma_connect - try to establish a transport connection
491 * @xprt: transport state
492 * @task: RPC scheduler context
496 xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task)
498 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
500 trace_xprtrdma_op_connect(r_xprt);
501 if (r_xprt->rx_ep.rep_connected != 0) {
503 schedule_delayed_work(&r_xprt->rx_connect_worker,
504 xprt->reestablish_timeout);
505 xprt->reestablish_timeout <<= 1;
506 if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO)
507 xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO;
508 else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO)
509 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
511 schedule_delayed_work(&r_xprt->rx_connect_worker, 0);
512 if (!RPC_IS_ASYNC(task))
513 flush_delayed_work(&r_xprt->rx_connect_worker);
518 * xprt_rdma_alloc_slot - allocate an rpc_rqst
519 * @xprt: controlling RPC transport
520 * @task: RPC task requesting a fresh rpc_rqst
523 * %0 if task->tk_rqstp points to a fresh rpc_rqst
524 * %-EAGAIN if no rpc_rqst is available; queued on backlog
527 xprt_rdma_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task)
529 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
530 struct rpcrdma_req *req;
532 req = rpcrdma_buffer_get(&r_xprt->rx_buf);
535 task->tk_rqstp = &req->rl_slot;
540 rpc_sleep_on(&xprt->backlog, task, NULL);
541 task->tk_status = -EAGAIN;
545 * xprt_rdma_free_slot - release an rpc_rqst
546 * @xprt: controlling RPC transport
547 * @rqst: rpc_rqst to release
551 xprt_rdma_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *rqst)
553 memset(rqst, 0, sizeof(*rqst));
554 rpcrdma_buffer_put(rpcr_to_rdmar(rqst));
555 rpc_wake_up_next(&xprt->backlog);
558 static bool rpcrdma_check_regbuf(struct rpcrdma_xprt *r_xprt,
559 struct rpcrdma_regbuf *rb, size_t size,
562 if (unlikely(rdmab_length(rb) < size)) {
563 if (!rpcrdma_regbuf_realloc(rb, size, flags))
565 r_xprt->rx_stats.hardway_register_count += size;
571 * xprt_rdma_allocate - allocate transport resources for an RPC
575 * 0: Success; rq_buffer points to RPC buffer to use
576 * ENOMEM: Out of memory, call again later
577 * EIO: A permanent error occurred, do not retry
580 xprt_rdma_allocate(struct rpc_task *task)
582 struct rpc_rqst *rqst = task->tk_rqstp;
583 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
584 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
587 flags = RPCRDMA_DEF_GFP;
588 if (RPC_IS_SWAPPER(task))
589 flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN;
591 if (!rpcrdma_check_regbuf(r_xprt, req->rl_sendbuf, rqst->rq_callsize,
594 if (!rpcrdma_check_regbuf(r_xprt, req->rl_recvbuf, rqst->rq_rcvsize,
598 rqst->rq_buffer = rdmab_data(req->rl_sendbuf);
599 rqst->rq_rbuffer = rdmab_data(req->rl_recvbuf);
600 trace_xprtrdma_op_allocate(task, req);
604 trace_xprtrdma_op_allocate(task, NULL);
609 * xprt_rdma_free - release resources allocated by xprt_rdma_allocate
612 * Caller guarantees rqst->rq_buffer is non-NULL.
615 xprt_rdma_free(struct rpc_task *task)
617 struct rpc_rqst *rqst = task->tk_rqstp;
618 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
619 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
621 if (test_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags))
622 rpcrdma_release_rqst(r_xprt, req);
623 trace_xprtrdma_op_free(task, req);
627 * xprt_rdma_send_request - marshal and send an RPC request
628 * @rqst: RPC message in rq_snd_buf
630 * Caller holds the transport's write lock.
633 * %0 if the RPC message has been sent
634 * %-ENOTCONN if the caller should reconnect and call again
635 * %-EAGAIN if the caller should call again
636 * %-ENOBUFS if the caller should call again after a delay
637 * %-EMSGSIZE if encoding ran out of buffer space. The request
638 * was not sent. Do not try to send this message again.
639 * %-EIO if an I/O error occurred. The request was not sent.
640 * Do not try to send this message again.
643 xprt_rdma_send_request(struct rpc_rqst *rqst)
645 struct rpc_xprt *xprt = rqst->rq_xprt;
646 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
647 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
650 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
651 if (unlikely(!rqst->rq_buffer))
652 return xprt_rdma_bc_send_reply(rqst);
653 #endif /* CONFIG_SUNRPC_BACKCHANNEL */
655 if (!xprt_connected(xprt))
658 if (!xprt_request_get_cong(xprt, rqst))
661 rc = rpcrdma_marshal_req(r_xprt, rqst);
665 /* Must suppress retransmit to maintain credits */
666 if (rqst->rq_connect_cookie == xprt->connect_cookie)
667 goto drop_connection;
668 rqst->rq_xtime = ktime_get();
670 __set_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags);
671 if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
672 goto drop_connection;
674 rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len;
676 /* An RPC with no reply will throw off credit accounting,
677 * so drop the connection to reset the credit grant.
679 if (!rpc_reply_expected(rqst->rq_task))
680 goto drop_connection;
687 xprt_rdma_close(xprt);
691 void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
693 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
696 if (xprt_connected(xprt))
697 idle_time = (long)(jiffies - xprt->last_used) / HZ;
699 seq_puts(seq, "\txprt:\trdma ");
700 seq_printf(seq, "%u %lu %lu %lu %ld %lu %lu %lu %llu %llu ",
701 0, /* need a local port? */
702 xprt->stat.bind_count,
703 xprt->stat.connect_count,
704 xprt->stat.connect_time / HZ,
711 seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu %lu ",
712 r_xprt->rx_stats.read_chunk_count,
713 r_xprt->rx_stats.write_chunk_count,
714 r_xprt->rx_stats.reply_chunk_count,
715 r_xprt->rx_stats.total_rdma_request,
716 r_xprt->rx_stats.total_rdma_reply,
717 r_xprt->rx_stats.pullup_copy_count,
718 r_xprt->rx_stats.fixup_copy_count,
719 r_xprt->rx_stats.hardway_register_count,
720 r_xprt->rx_stats.failed_marshal_count,
721 r_xprt->rx_stats.bad_reply_count,
722 r_xprt->rx_stats.nomsg_call_count);
723 seq_printf(seq, "%lu %lu %lu %lu %lu %lu\n",
724 r_xprt->rx_stats.mrs_recycled,
725 r_xprt->rx_stats.mrs_orphaned,
726 r_xprt->rx_stats.mrs_allocated,
727 r_xprt->rx_stats.local_inv_needed,
728 r_xprt->rx_stats.empty_sendctx_q,
729 r_xprt->rx_stats.reply_waits_for_send);
733 xprt_rdma_enable_swap(struct rpc_xprt *xprt)
739 xprt_rdma_disable_swap(struct rpc_xprt *xprt)
744 * Plumbing for rpc transport switch and kernel module
747 static const struct rpc_xprt_ops xprt_rdma_procs = {
748 .reserve_xprt = xprt_reserve_xprt_cong,
749 .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */
750 .alloc_slot = xprt_rdma_alloc_slot,
751 .free_slot = xprt_rdma_free_slot,
752 .release_request = xprt_release_rqst_cong, /* ditto */
753 .wait_for_reply_request = xprt_wait_for_reply_request_def, /* ditto */
754 .timer = xprt_rdma_timer,
755 .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */
756 .set_port = xprt_rdma_set_port,
757 .connect = xprt_rdma_connect,
758 .buf_alloc = xprt_rdma_allocate,
759 .buf_free = xprt_rdma_free,
760 .send_request = xprt_rdma_send_request,
761 .close = xprt_rdma_close,
762 .destroy = xprt_rdma_destroy,
763 .print_stats = xprt_rdma_print_stats,
764 .enable_swap = xprt_rdma_enable_swap,
765 .disable_swap = xprt_rdma_disable_swap,
766 .inject_disconnect = xprt_rdma_inject_disconnect,
767 #if defined(CONFIG_SUNRPC_BACKCHANNEL)
768 .bc_setup = xprt_rdma_bc_setup,
769 .bc_maxpayload = xprt_rdma_bc_maxpayload,
770 .bc_free_rqst = xprt_rdma_bc_free_rqst,
771 .bc_destroy = xprt_rdma_bc_destroy,
775 static struct xprt_class xprt_rdma = {
776 .list = LIST_HEAD_INIT(xprt_rdma.list),
778 .owner = THIS_MODULE,
779 .ident = XPRT_TRANSPORT_RDMA,
780 .setup = xprt_setup_rdma,
783 void xprt_rdma_cleanup(void)
785 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
786 if (sunrpc_table_header) {
787 unregister_sysctl_table(sunrpc_table_header);
788 sunrpc_table_header = NULL;
792 xprt_unregister_transport(&xprt_rdma);
793 xprt_unregister_transport(&xprt_rdma_bc);
796 int xprt_rdma_init(void)
800 rc = xprt_register_transport(&xprt_rdma);
804 rc = xprt_register_transport(&xprt_rdma_bc);
806 xprt_unregister_transport(&xprt_rdma);
810 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
811 if (!sunrpc_table_header)
812 sunrpc_table_header = register_sysctl_table(sunrpc_table);