2 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the BSD-type
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
17 * Redistributions in binary form must reproduce the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer in the documentation and/or other materials provided
20 * with the distribution.
22 * Neither the name of the Network Appliance, Inc. nor the names of
23 * its contributors may be used to endorse or promote products
24 * derived from this software without specific prior written
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 * This file contains the top-level implementation of an RPC RDMA
46 * Naming convention: functions beginning with xprt_ are part of the
47 * transport switch. All others are RPC RDMA internal.
50 #include <linux/module.h>
51 #include <linux/slab.h>
52 #include <linux/seq_file.h>
53 #include <linux/sunrpc/addr.h>
55 #include "xprt_rdma.h"
57 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
58 # define RPCDBG_FACILITY RPCDBG_TRANS
65 static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE;
66 static unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
67 static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
68 static unsigned int xprt_rdma_inline_write_padding;
69 static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR;
70 int xprt_rdma_pad_optimize = 1;
72 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
74 static unsigned int min_slot_table_size = RPCRDMA_MIN_SLOT_TABLE;
75 static unsigned int max_slot_table_size = RPCRDMA_MAX_SLOT_TABLE;
76 static unsigned int zero;
77 static unsigned int max_padding = PAGE_SIZE;
78 static unsigned int min_memreg = RPCRDMA_BOUNCEBUFFERS;
79 static unsigned int max_memreg = RPCRDMA_LAST - 1;
81 static struct ctl_table_header *sunrpc_table_header;
83 static struct ctl_table xr_tunables_table[] = {
85 .procname = "rdma_slot_table_entries",
86 .data = &xprt_rdma_slot_table_entries,
87 .maxlen = sizeof(unsigned int),
89 .proc_handler = proc_dointvec_minmax,
90 .extra1 = &min_slot_table_size,
91 .extra2 = &max_slot_table_size
94 .procname = "rdma_max_inline_read",
95 .data = &xprt_rdma_max_inline_read,
96 .maxlen = sizeof(unsigned int),
98 .proc_handler = proc_dointvec,
101 .procname = "rdma_max_inline_write",
102 .data = &xprt_rdma_max_inline_write,
103 .maxlen = sizeof(unsigned int),
105 .proc_handler = proc_dointvec,
108 .procname = "rdma_inline_write_padding",
109 .data = &xprt_rdma_inline_write_padding,
110 .maxlen = sizeof(unsigned int),
112 .proc_handler = proc_dointvec_minmax,
114 .extra2 = &max_padding,
117 .procname = "rdma_memreg_strategy",
118 .data = &xprt_rdma_memreg_strategy,
119 .maxlen = sizeof(unsigned int),
121 .proc_handler = proc_dointvec_minmax,
122 .extra1 = &min_memreg,
123 .extra2 = &max_memreg,
126 .procname = "rdma_pad_optimize",
127 .data = &xprt_rdma_pad_optimize,
128 .maxlen = sizeof(unsigned int),
130 .proc_handler = proc_dointvec,
135 static struct ctl_table sunrpc_table[] = {
137 .procname = "sunrpc",
139 .child = xr_tunables_table
146 #define RPCRDMA_BIND_TO (60U * HZ)
147 #define RPCRDMA_INIT_REEST_TO (5U * HZ)
148 #define RPCRDMA_MAX_REEST_TO (30U * HZ)
149 #define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ)
151 static struct rpc_xprt_ops xprt_rdma_procs; /* forward reference */
154 xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap)
156 struct sockaddr_in *sin = (struct sockaddr_in *)sap;
159 snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr));
160 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
162 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA;
166 xprt_rdma_format_addresses6(struct rpc_xprt *xprt, struct sockaddr *sap)
168 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
171 snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
172 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
174 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA6;
178 xprt_rdma_format_addresses(struct rpc_xprt *xprt)
180 struct sockaddr *sap = (struct sockaddr *)
181 &rpcx_to_rdmad(xprt).addr;
184 switch (sap->sa_family) {
186 xprt_rdma_format_addresses4(xprt, sap);
189 xprt_rdma_format_addresses6(xprt, sap);
192 pr_err("rpcrdma: Unrecognized address family\n");
196 (void)rpc_ntop(sap, buf, sizeof(buf));
197 xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL);
199 snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
200 xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
202 snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
203 xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
205 xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma";
209 xprt_rdma_free_addresses(struct rpc_xprt *xprt)
213 for (i = 0; i < RPC_DISPLAY_MAX; i++)
215 case RPC_DISPLAY_PROTO:
216 case RPC_DISPLAY_NETID:
219 kfree(xprt->address_strings[i]);
224 xprt_rdma_connect_worker(struct work_struct *work)
226 struct rpcrdma_xprt *r_xprt = container_of(work, struct rpcrdma_xprt,
227 rx_connect_worker.work);
228 struct rpc_xprt *xprt = &r_xprt->rx_xprt;
231 xprt_clear_connected(xprt);
233 dprintk("RPC: %s: %sconnect\n", __func__,
234 r_xprt->rx_ep.rep_connected != 0 ? "re" : "");
235 rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia);
237 xprt_wake_pending_tasks(xprt, rc);
239 dprintk("RPC: %s: exit\n", __func__);
240 xprt_clear_connecting(xprt);
244 xprt_rdma_inject_disconnect(struct rpc_xprt *xprt)
246 struct rpcrdma_xprt *r_xprt = container_of(xprt, struct rpcrdma_xprt,
249 pr_info("rpcrdma: injecting transport disconnect on xprt=%p\n", xprt);
250 rdma_disconnect(r_xprt->rx_ia.ri_id);
257 * Free all memory associated with the object, including its own.
258 * NOTE: none of the *destroy methods free memory for their top-level
259 * objects, even though they may have allocated it (they do free
260 * private memory). It's up to the caller to handle it. In this
261 * case (RDMA transport), all structure memory is inlined with the
262 * struct rpcrdma_xprt.
265 xprt_rdma_destroy(struct rpc_xprt *xprt)
267 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
269 dprintk("RPC: %s: called\n", __func__);
271 cancel_delayed_work_sync(&r_xprt->rx_connect_worker);
273 xprt_clear_connected(xprt);
275 rpcrdma_buffer_destroy(&r_xprt->rx_buf);
276 rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia);
277 rpcrdma_ia_close(&r_xprt->rx_ia);
279 xprt_rdma_free_addresses(xprt);
283 dprintk("RPC: %s: returning\n", __func__);
285 module_put(THIS_MODULE);
288 static const struct rpc_timeout xprt_rdma_default_timeout = {
289 .to_initval = 60 * HZ,
290 .to_maxval = 60 * HZ,
294 * xprt_setup_rdma - Set up transport to use RDMA
296 * @args: rpc transport arguments
298 static struct rpc_xprt *
299 xprt_setup_rdma(struct xprt_create *args)
301 struct rpcrdma_create_data_internal cdata;
302 struct rpc_xprt *xprt;
303 struct rpcrdma_xprt *new_xprt;
304 struct rpcrdma_ep *new_ep;
305 struct sockaddr_in *sin;
308 if (args->addrlen > sizeof(xprt->addr)) {
309 dprintk("RPC: %s: address too large\n", __func__);
310 return ERR_PTR(-EBADF);
313 xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt),
314 xprt_rdma_slot_table_entries,
315 xprt_rdma_slot_table_entries);
317 dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n",
319 return ERR_PTR(-ENOMEM);
322 /* 60 second timeout, no retries */
323 xprt->timeout = &xprt_rdma_default_timeout;
324 xprt->bind_timeout = RPCRDMA_BIND_TO;
325 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
326 xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO;
328 xprt->resvport = 0; /* privileged port not needed */
329 xprt->tsh_size = 0; /* RPC-RDMA handles framing */
330 xprt->ops = &xprt_rdma_procs;
333 * Set up RDMA-specific connect data.
336 /* Put server RDMA address in local cdata */
337 memcpy(&cdata.addr, args->dstaddr, args->addrlen);
339 /* Ensure xprt->addr holds valid server TCP (not RDMA)
340 * address, for any side protocols which peek at it */
341 xprt->prot = IPPROTO_TCP;
342 xprt->addrlen = args->addrlen;
343 memcpy(&xprt->addr, &cdata.addr, xprt->addrlen);
345 sin = (struct sockaddr_in *)&cdata.addr;
346 if (ntohs(sin->sin_port) != 0)
347 xprt_set_bound(xprt);
349 dprintk("RPC: %s: %pI4:%u\n",
350 __func__, &sin->sin_addr.s_addr, ntohs(sin->sin_port));
352 /* Set max requests */
353 cdata.max_requests = xprt->max_reqs;
355 /* Set some length limits */
356 cdata.rsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA write max */
357 cdata.wsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA read max */
359 cdata.inline_wsize = xprt_rdma_max_inline_write;
360 if (cdata.inline_wsize > cdata.wsize)
361 cdata.inline_wsize = cdata.wsize;
363 cdata.inline_rsize = xprt_rdma_max_inline_read;
364 if (cdata.inline_rsize > cdata.rsize)
365 cdata.inline_rsize = cdata.rsize;
367 cdata.padding = xprt_rdma_inline_write_padding;
370 * Create new transport instance, which includes initialized
376 new_xprt = rpcx_to_rdmax(xprt);
378 rc = rpcrdma_ia_open(new_xprt, (struct sockaddr *) &cdata.addr,
379 xprt_rdma_memreg_strategy);
384 * initialize and create ep
386 new_xprt->rx_data = cdata;
387 new_ep = &new_xprt->rx_ep;
388 new_ep->rep_remote_addr = cdata.addr;
390 rc = rpcrdma_ep_create(&new_xprt->rx_ep,
391 &new_xprt->rx_ia, &new_xprt->rx_data);
396 * Allocate pre-registered send and receive buffers for headers and
397 * any inline data. Also specify any padding which will be provided
398 * from a preregistered zero buffer.
400 rc = rpcrdma_buffer_create(new_xprt);
405 * Register a callback for connection events. This is necessary because
406 * connection loss notification is async. We also catch connection loss
407 * when reaping receives.
409 INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
410 xprt_rdma_connect_worker);
412 xprt_rdma_format_addresses(xprt);
413 xprt->max_payload = new_xprt->rx_ia.ri_ops->ro_maxpages(new_xprt);
414 if (xprt->max_payload == 0)
416 xprt->max_payload <<= PAGE_SHIFT;
417 dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
418 __func__, xprt->max_payload);
420 if (!try_module_get(THIS_MODULE))
426 xprt_rdma_free_addresses(xprt);
429 rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia);
431 rpcrdma_ia_close(&new_xprt->rx_ia);
438 * Close a connection, during shutdown or timeout/reconnect
441 xprt_rdma_close(struct rpc_xprt *xprt)
443 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
445 dprintk("RPC: %s: closing\n", __func__);
446 if (r_xprt->rx_ep.rep_connected > 0)
447 xprt->reestablish_timeout = 0;
448 xprt_disconnect_done(xprt);
449 rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
453 xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port)
455 struct sockaddr_in *sap;
457 sap = (struct sockaddr_in *)&xprt->addr;
458 sap->sin_port = htons(port);
459 sap = (struct sockaddr_in *)&rpcx_to_rdmad(xprt).addr;
460 sap->sin_port = htons(port);
461 dprintk("RPC: %s: %u\n", __func__, port);
465 xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task)
467 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
469 if (r_xprt->rx_ep.rep_connected != 0) {
471 schedule_delayed_work(&r_xprt->rx_connect_worker,
472 xprt->reestablish_timeout);
473 xprt->reestablish_timeout <<= 1;
474 if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO)
475 xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO;
476 else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO)
477 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
479 schedule_delayed_work(&r_xprt->rx_connect_worker, 0);
480 if (!RPC_IS_ASYNC(task))
481 flush_delayed_work(&r_xprt->rx_connect_worker);
486 * The RDMA allocate/free functions need the task structure as a place
487 * to hide the struct rpcrdma_req, which is necessary for the actual send/recv
490 * The RPC layer allocates both send and receive buffers in the same call
491 * (rq_send_buf and rq_rcv_buf are both part of a single contiguous buffer).
492 * We may register rq_rcv_buf when using reply chunks.
495 xprt_rdma_allocate(struct rpc_task *task, size_t size)
497 struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt;
498 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
499 struct rpcrdma_regbuf *rb;
500 struct rpcrdma_req *req;
504 req = rpcrdma_buffer_get(&r_xprt->rx_buf);
508 flags = GFP_NOIO | __GFP_NOWARN;
509 if (RPC_IS_SWAPPER(task))
510 flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN;
512 if (req->rl_rdmabuf == NULL)
514 if (req->rl_sendbuf == NULL)
516 if (size > req->rl_sendbuf->rg_size)
520 dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req);
521 req->rl_connect_cookie = 0; /* our reserved value */
522 return req->rl_sendbuf->rg_base;
525 min_size = RPCRDMA_INLINE_WRITE_THRESHOLD(task->tk_rqstp);
526 rb = rpcrdma_alloc_regbuf(&r_xprt->rx_ia, min_size, flags);
529 req->rl_rdmabuf = rb;
532 /* XDR encoding and RPC/RDMA marshaling of this request has not
533 * yet occurred. Thus a lower bound is needed to prevent buffer
534 * overrun during marshaling.
536 * RPC/RDMA marshaling may choose to send payload bearing ops
537 * inline, if the result is smaller than the inline threshold.
538 * The value of the "size" argument accounts for header
539 * requirements but not for the payload in these cases.
541 * Likewise, allocate enough space to receive a reply up to the
542 * size of the inline threshold.
544 * It's unlikely that both the send header and the received
545 * reply will be large, but slush is provided here to allow
546 * flexibility when marshaling.
548 min_size = RPCRDMA_INLINE_READ_THRESHOLD(task->tk_rqstp);
549 min_size += RPCRDMA_INLINE_WRITE_THRESHOLD(task->tk_rqstp);
553 rb = rpcrdma_alloc_regbuf(&r_xprt->rx_ia, size, flags);
558 r_xprt->rx_stats.hardway_register_count += size;
559 rpcrdma_free_regbuf(&r_xprt->rx_ia, req->rl_sendbuf);
560 req->rl_sendbuf = rb;
564 rpcrdma_buffer_put(req);
565 r_xprt->rx_stats.failed_marshal_count++;
570 * This function returns all RDMA resources to the pool.
573 xprt_rdma_free(void *buffer)
575 struct rpcrdma_req *req;
576 struct rpcrdma_xprt *r_xprt;
577 struct rpcrdma_regbuf *rb;
583 rb = container_of(buffer, struct rpcrdma_regbuf, rg_base[0]);
585 r_xprt = container_of(req->rl_buffer, struct rpcrdma_xprt, rx_buf);
587 dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
589 for (i = 0; req->rl_nchunks;) {
591 i += r_xprt->rx_ia.ri_ops->ro_unmap(r_xprt,
592 &req->rl_segments[i]);
595 rpcrdma_buffer_put(req);
599 * send_request invokes the meat of RPC RDMA. It must do the following:
600 * 1. Marshal the RPC request into an RPC RDMA request, which means
601 * putting a header in front of data, and creating IOVs for RDMA
602 * from those in the request.
603 * 2. In marshaling, detect opportunities for RDMA, and use them.
604 * 3. Post a recv message to set up asynch completion, then send
605 * the request (rpcrdma_ep_post).
606 * 4. No partial sends are possible in the RPC-RDMA protocol (as in UDP).
610 xprt_rdma_send_request(struct rpc_task *task)
612 struct rpc_rqst *rqst = task->tk_rqstp;
613 struct rpc_xprt *xprt = rqst->rq_xprt;
614 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
615 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
618 rc = rpcrdma_marshal_req(rqst);
622 if (req->rl_reply == NULL) /* e.g. reconnection */
623 rpcrdma_recv_buffer_get(req);
625 /* Must suppress retransmit to maintain credits */
626 if (req->rl_connect_cookie == xprt->connect_cookie)
627 goto drop_connection;
628 req->rl_connect_cookie = xprt->connect_cookie;
630 if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
631 goto drop_connection;
633 rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len;
634 rqst->rq_bytes_sent = 0;
638 r_xprt->rx_stats.failed_marshal_count++;
639 dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n",
644 xprt_disconnect_done(xprt);
645 return -ENOTCONN; /* implies disconnect */
648 static void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
650 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
653 if (xprt_connected(xprt))
654 idle_time = (long)(jiffies - xprt->last_used) / HZ;
657 "\txprt:\trdma %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu "
658 "%lu %lu %lu %Lu %Lu %Lu %Lu %lu %lu %lu\n",
660 0, /* need a local port? */
661 xprt->stat.bind_count,
662 xprt->stat.connect_count,
663 xprt->stat.connect_time,
671 r_xprt->rx_stats.read_chunk_count,
672 r_xprt->rx_stats.write_chunk_count,
673 r_xprt->rx_stats.reply_chunk_count,
674 r_xprt->rx_stats.total_rdma_request,
675 r_xprt->rx_stats.total_rdma_reply,
676 r_xprt->rx_stats.pullup_copy_count,
677 r_xprt->rx_stats.fixup_copy_count,
678 r_xprt->rx_stats.hardway_register_count,
679 r_xprt->rx_stats.failed_marshal_count,
680 r_xprt->rx_stats.bad_reply_count);
684 xprt_rdma_enable_swap(struct rpc_xprt *xprt)
690 xprt_rdma_disable_swap(struct rpc_xprt *xprt)
695 * Plumbing for rpc transport switch and kernel module
698 static struct rpc_xprt_ops xprt_rdma_procs = {
699 .reserve_xprt = xprt_reserve_xprt_cong,
700 .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */
701 .alloc_slot = xprt_alloc_slot,
702 .release_request = xprt_release_rqst_cong, /* ditto */
703 .set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */
704 .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */
705 .set_port = xprt_rdma_set_port,
706 .connect = xprt_rdma_connect,
707 .buf_alloc = xprt_rdma_allocate,
708 .buf_free = xprt_rdma_free,
709 .send_request = xprt_rdma_send_request,
710 .close = xprt_rdma_close,
711 .destroy = xprt_rdma_destroy,
712 .print_stats = xprt_rdma_print_stats,
713 .enable_swap = xprt_rdma_enable_swap,
714 .disable_swap = xprt_rdma_disable_swap,
715 .inject_disconnect = xprt_rdma_inject_disconnect
718 static struct xprt_class xprt_rdma = {
719 .list = LIST_HEAD_INIT(xprt_rdma.list),
721 .owner = THIS_MODULE,
722 .ident = XPRT_TRANSPORT_RDMA,
723 .setup = xprt_setup_rdma,
726 void xprt_rdma_cleanup(void)
730 dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
731 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
732 if (sunrpc_table_header) {
733 unregister_sysctl_table(sunrpc_table_header);
734 sunrpc_table_header = NULL;
737 rc = xprt_unregister_transport(&xprt_rdma);
739 dprintk("RPC: %s: xprt_unregister returned %i\n",
742 frwr_destroy_recovery_wq();
745 int xprt_rdma_init(void)
749 rc = frwr_alloc_recovery_wq();
753 rc = xprt_register_transport(&xprt_rdma);
755 frwr_destroy_recovery_wq();
759 dprintk("RPCRDMA Module Init, register RPC RDMA transport\n");
761 dprintk("Defaults:\n");
762 dprintk("\tSlots %d\n"
763 "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n",
764 xprt_rdma_slot_table_entries,
765 xprt_rdma_max_inline_read, xprt_rdma_max_inline_write);
766 dprintk("\tPadding %d\n\tMemreg %d\n",
767 xprt_rdma_inline_write_padding, xprt_rdma_memreg_strategy);
769 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
770 if (!sunrpc_table_header)
771 sunrpc_table_header = register_sysctl_table(sunrpc_table);