blob: 7e11d719120836bdfb9d12602f305e441d935379 [file] [log] [blame]
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -04001/*
2 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
3 *
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
8 * license below:
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 *
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.
21 *
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
25 * permission.
26 *
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.
38 */
39
40/*
41 * transport.c
42 *
43 * This file contains the top-level implementation of an RPC RDMA
44 * transport.
45 *
46 * Naming convention: functions beginning with xprt_ are part of the
47 * transport switch. All others are RPC RDMA internal.
48 */
49
50#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090051#include <linux/slab.h>
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040052#include <linux/seq_file.h>
Jeff Layton59766872013-02-04 12:50:00 -050053#include <linux/sunrpc/addr.h>
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040054
55#include "xprt_rdma.h"
56
Jeff Laytonf895b252014-11-17 16:58:04 -050057#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040058# define RPCDBG_FACILITY RPCDBG_TRANS
59#endif
60
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040061/*
62 * tunables
63 */
64
65static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE;
Chuck Lever5d252f92016-01-07 14:50:10 -050066unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040067static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
68static unsigned int xprt_rdma_inline_write_padding;
Tom Talpey3197d3092008-10-09 15:00:20 -040069static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR;
Chuck Leverd5440e22014-11-08 20:14:53 -050070 int xprt_rdma_pad_optimize = 1;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040071
Jeff Laytonf895b252014-11-17 16:58:04 -050072#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040073
74static unsigned int min_slot_table_size = RPCRDMA_MIN_SLOT_TABLE;
75static unsigned int max_slot_table_size = RPCRDMA_MAX_SLOT_TABLE;
Chuck Lever29c55422016-05-02 14:40:48 -040076static unsigned int min_inline_size = RPCRDMA_MIN_INLINE;
77static unsigned int max_inline_size = RPCRDMA_MAX_INLINE;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040078static 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;
82
83static struct ctl_table_header *sunrpc_table_header;
84
Joe Perchesfe2c6332013-06-11 23:04:25 -070085static struct ctl_table xr_tunables_table[] = {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040086 {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040087 .procname = "rdma_slot_table_entries",
88 .data = &xprt_rdma_slot_table_entries,
89 .maxlen = sizeof(unsigned int),
90 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -080091 .proc_handler = proc_dointvec_minmax,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040092 .extra1 = &min_slot_table_size,
93 .extra2 = &max_slot_table_size
94 },
95 {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -040096 .procname = "rdma_max_inline_read",
97 .data = &xprt_rdma_max_inline_read,
98 .maxlen = sizeof(unsigned int),
99 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800100 .proc_handler = proc_dointvec,
Chuck Lever29c55422016-05-02 14:40:48 -0400101 .extra1 = &min_inline_size,
102 .extra2 = &max_inline_size,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400103 },
104 {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400105 .procname = "rdma_max_inline_write",
106 .data = &xprt_rdma_max_inline_write,
107 .maxlen = sizeof(unsigned int),
108 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800109 .proc_handler = proc_dointvec,
Chuck Lever29c55422016-05-02 14:40:48 -0400110 .extra1 = &min_inline_size,
111 .extra2 = &max_inline_size,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400112 },
113 {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400114 .procname = "rdma_inline_write_padding",
115 .data = &xprt_rdma_inline_write_padding,
116 .maxlen = sizeof(unsigned int),
117 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800118 .proc_handler = proc_dointvec_minmax,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400119 .extra1 = &zero,
120 .extra2 = &max_padding,
121 },
122 {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400123 .procname = "rdma_memreg_strategy",
124 .data = &xprt_rdma_memreg_strategy,
125 .maxlen = sizeof(unsigned int),
126 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800127 .proc_handler = proc_dointvec_minmax,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400128 .extra1 = &min_memreg,
129 .extra2 = &max_memreg,
130 },
131 {
Tom Talpey9191ca32008-10-09 15:01:11 -0400132 .procname = "rdma_pad_optimize",
133 .data = &xprt_rdma_pad_optimize,
134 .maxlen = sizeof(unsigned int),
135 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -0800136 .proc_handler = proc_dointvec,
Tom Talpey9191ca32008-10-09 15:01:11 -0400137 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800138 { },
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400139};
140
Joe Perchesfe2c6332013-06-11 23:04:25 -0700141static struct ctl_table sunrpc_table[] = {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400142 {
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400143 .procname = "sunrpc",
144 .mode = 0555,
145 .child = xr_tunables_table
146 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800147 { },
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400148};
149
150#endif
151
Chuck Lever5d252f92016-01-07 14:50:10 -0500152static struct rpc_xprt_ops xprt_rdma_procs; /*forward reference */
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400153
154static void
Chuck Lever0dd39ca2015-03-30 14:33:43 -0400155xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap)
156{
157 struct sockaddr_in *sin = (struct sockaddr_in *)sap;
158 char buf[20];
159
160 snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr));
161 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
162
163 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA;
164}
165
166static void
167xprt_rdma_format_addresses6(struct rpc_xprt *xprt, struct sockaddr *sap)
168{
169 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
170 char buf[40];
171
172 snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
173 xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
174
175 xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA6;
176}
177
Chuck Lever5d252f92016-01-07 14:50:10 -0500178void
Chuck Lever5231eb92015-08-03 13:02:41 -0400179xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400180{
Chuck Lever0dd39ca2015-03-30 14:33:43 -0400181 char buf[128];
182
183 switch (sap->sa_family) {
184 case AF_INET:
185 xprt_rdma_format_addresses4(xprt, sap);
186 break;
187 case AF_INET6:
188 xprt_rdma_format_addresses6(xprt, sap);
189 break;
190 default:
191 pr_err("rpcrdma: Unrecognized address family\n");
192 return;
193 }
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400194
Chuck Leverc877b842009-08-09 15:09:36 -0400195 (void)rpc_ntop(sap, buf, sizeof(buf));
196 xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400197
Joe Perches81160e662010-03-08 12:15:59 -0800198 snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
Chuck Leverc877b842009-08-09 15:09:36 -0400199 xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400200
Joe Perches81160e662010-03-08 12:15:59 -0800201 snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
Chuck Leverc877b842009-08-09 15:09:36 -0400202 xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400203
Chuck Lever0dd39ca2015-03-30 14:33:43 -0400204 xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma";
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400205}
206
Chuck Lever5d252f92016-01-07 14:50:10 -0500207void
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400208xprt_rdma_free_addresses(struct rpc_xprt *xprt)
209{
Chuck Lever33e01dc2008-01-14 12:32:20 -0500210 unsigned int i;
211
212 for (i = 0; i < RPC_DISPLAY_MAX; i++)
213 switch (i) {
214 case RPC_DISPLAY_PROTO:
215 case RPC_DISPLAY_NETID:
216 continue;
217 default:
218 kfree(xprt->address_strings[i]);
219 }
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400220}
221
222static void
223xprt_rdma_connect_worker(struct work_struct *work)
224{
Chuck Lever5abefb82015-01-21 11:02:37 -0500225 struct rpcrdma_xprt *r_xprt = container_of(work, struct rpcrdma_xprt,
226 rx_connect_worker.work);
227 struct rpc_xprt *xprt = &r_xprt->rx_xprt;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400228 int rc = 0;
229
Trond Myklebustd19751e2012-09-11 17:21:25 -0400230 xprt_clear_connected(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400231
Trond Myklebustd19751e2012-09-11 17:21:25 -0400232 dprintk("RPC: %s: %sconnect\n", __func__,
233 r_xprt->rx_ep.rep_connected != 0 ? "re" : "");
234 rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia);
235 if (rc)
236 xprt_wake_pending_tasks(xprt, rc);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400237
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400238 dprintk("RPC: %s: exit\n", __func__);
239 xprt_clear_connecting(xprt);
240}
241
Chuck Lever4a068252015-05-11 14:02:25 -0400242static void
243xprt_rdma_inject_disconnect(struct rpc_xprt *xprt)
244{
245 struct rpcrdma_xprt *r_xprt = container_of(xprt, struct rpcrdma_xprt,
246 rx_xprt);
247
248 pr_info("rpcrdma: injecting transport disconnect on xprt=%p\n", xprt);
249 rdma_disconnect(r_xprt->rx_ia.ri_id);
250}
251
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400252/*
253 * xprt_rdma_destroy
254 *
255 * Destroy the xprt.
256 * Free all memory associated with the object, including its own.
257 * NOTE: none of the *destroy methods free memory for their top-level
258 * objects, even though they may have allocated it (they do free
259 * private memory). It's up to the caller to handle it. In this
260 * case (RDMA transport), all structure memory is inlined with the
261 * struct rpcrdma_xprt.
262 */
263static void
264xprt_rdma_destroy(struct rpc_xprt *xprt)
265{
266 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400267
268 dprintk("RPC: %s: called\n", __func__);
269
Chuck Lever5abefb82015-01-21 11:02:37 -0500270 cancel_delayed_work_sync(&r_xprt->rx_connect_worker);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400271
272 xprt_clear_connected(xprt);
273
Chuck Lever7f1d5412014-05-28 10:33:16 -0400274 rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia);
Steve Wise72c02172015-09-21 12:24:23 -0500275 rpcrdma_buffer_destroy(&r_xprt->rx_buf);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400276 rpcrdma_ia_close(&r_xprt->rx_ia);
277
278 xprt_rdma_free_addresses(xprt);
279
Pavel Emelyanove204e622010-09-29 16:03:13 +0400280 xprt_free(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400281
282 dprintk("RPC: %s: returning\n", __func__);
283
284 module_put(THIS_MODULE);
285}
286
Trond Myklebust2881ae72007-12-20 16:03:54 -0500287static const struct rpc_timeout xprt_rdma_default_timeout = {
288 .to_initval = 60 * HZ,
289 .to_maxval = 60 * HZ,
290};
291
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400292/**
293 * xprt_setup_rdma - Set up transport to use RDMA
294 *
295 * @args: rpc transport arguments
296 */
297static struct rpc_xprt *
298xprt_setup_rdma(struct xprt_create *args)
299{
300 struct rpcrdma_create_data_internal cdata;
301 struct rpc_xprt *xprt;
302 struct rpcrdma_xprt *new_xprt;
303 struct rpcrdma_ep *new_ep;
Chuck Lever5231eb92015-08-03 13:02:41 -0400304 struct sockaddr *sap;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400305 int rc;
306
307 if (args->addrlen > sizeof(xprt->addr)) {
308 dprintk("RPC: %s: address too large\n", __func__);
309 return ERR_PTR(-EBADF);
310 }
311
Pavel Emelyanov37aa2132010-09-29 16:05:43 +0400312 xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt),
Trond Myklebustd9ba1312011-07-17 18:11:30 -0400313 xprt_rdma_slot_table_entries,
Pavel Emelyanovbd1722d2010-09-29 16:02:43 +0400314 xprt_rdma_slot_table_entries);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400315 if (xprt == NULL) {
316 dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n",
317 __func__);
318 return ERR_PTR(-ENOMEM);
319 }
320
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400321 /* 60 second timeout, no retries */
Trond Myklebustba7392b2007-12-20 16:03:55 -0500322 xprt->timeout = &xprt_rdma_default_timeout;
Chuck Leverbfaee092014-05-28 10:34:32 -0400323 xprt->bind_timeout = RPCRDMA_BIND_TO;
324 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
325 xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400326
327 xprt->resvport = 0; /* privileged port not needed */
328 xprt->tsh_size = 0; /* RPC-RDMA handles framing */
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400329 xprt->ops = &xprt_rdma_procs;
330
331 /*
332 * Set up RDMA-specific connect data.
333 */
334
Chuck Lever5231eb92015-08-03 13:02:41 -0400335 sap = (struct sockaddr *)&cdata.addr;
336 memcpy(sap, args->dstaddr, args->addrlen);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400337
338 /* Ensure xprt->addr holds valid server TCP (not RDMA)
339 * address, for any side protocols which peek at it */
340 xprt->prot = IPPROTO_TCP;
341 xprt->addrlen = args->addrlen;
Chuck Lever5231eb92015-08-03 13:02:41 -0400342 memcpy(&xprt->addr, sap, xprt->addrlen);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400343
Chuck Lever5231eb92015-08-03 13:02:41 -0400344 if (rpc_get_port(sap))
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400345 xprt_set_bound(xprt);
346
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400347 cdata.max_requests = xprt->max_reqs;
348
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400349 cdata.rsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA write max */
350 cdata.wsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA read max */
351
352 cdata.inline_wsize = xprt_rdma_max_inline_write;
353 if (cdata.inline_wsize > cdata.wsize)
354 cdata.inline_wsize = cdata.wsize;
355
356 cdata.inline_rsize = xprt_rdma_max_inline_read;
357 if (cdata.inline_rsize > cdata.rsize)
358 cdata.inline_rsize = cdata.rsize;
359
360 cdata.padding = xprt_rdma_inline_write_padding;
361
362 /*
363 * Create new transport instance, which includes initialized
364 * o ia
365 * o endpoint
366 * o buffers
367 */
368
369 new_xprt = rpcx_to_rdmax(xprt);
370
Chuck Lever5231eb92015-08-03 13:02:41 -0400371 rc = rpcrdma_ia_open(new_xprt, sap, xprt_rdma_memreg_strategy);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400372 if (rc)
373 goto out1;
374
375 /*
376 * initialize and create ep
377 */
378 new_xprt->rx_data = cdata;
379 new_ep = &new_xprt->rx_ep;
380 new_ep->rep_remote_addr = cdata.addr;
381
382 rc = rpcrdma_ep_create(&new_xprt->rx_ep,
383 &new_xprt->rx_ia, &new_xprt->rx_data);
384 if (rc)
385 goto out2;
386
387 /*
388 * Allocate pre-registered send and receive buffers for headers and
389 * any inline data. Also specify any padding which will be provided
390 * from a preregistered zero buffer.
391 */
Chuck Leverac920d02015-01-21 11:03:44 -0500392 rc = rpcrdma_buffer_create(new_xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400393 if (rc)
394 goto out3;
395
396 /*
397 * Register a callback for connection events. This is necessary because
398 * connection loss notification is async. We also catch connection loss
399 * when reaping receives.
400 */
Chuck Lever5abefb82015-01-21 11:02:37 -0500401 INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
402 xprt_rdma_connect_worker);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400403
Chuck Lever5231eb92015-08-03 13:02:41 -0400404 xprt_rdma_format_addresses(xprt, sap);
Chuck Lever1c9351e2015-03-30 14:34:30 -0400405 xprt->max_payload = new_xprt->rx_ia.ri_ops->ro_maxpages(new_xprt);
406 if (xprt->max_payload == 0)
407 goto out4;
408 xprt->max_payload <<= PAGE_SHIFT;
Chuck Lever43e95982014-07-29 17:23:34 -0400409 dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
410 __func__, xprt->max_payload);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400411
412 if (!try_module_get(THIS_MODULE))
413 goto out4;
414
Chuck Lever5231eb92015-08-03 13:02:41 -0400415 dprintk("RPC: %s: %s:%s\n", __func__,
416 xprt->address_strings[RPC_DISPLAY_ADDR],
417 xprt->address_strings[RPC_DISPLAY_PORT]);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400418 return xprt;
419
420out4:
421 xprt_rdma_free_addresses(xprt);
422 rc = -EINVAL;
423out3:
Chuck Lever7f1d5412014-05-28 10:33:16 -0400424 rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400425out2:
426 rpcrdma_ia_close(&new_xprt->rx_ia);
427out1:
Pavel Emelyanove204e622010-09-29 16:03:13 +0400428 xprt_free(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400429 return ERR_PTR(rc);
430}
431
432/*
433 * Close a connection, during shutdown or timeout/reconnect
434 */
435static void
436xprt_rdma_close(struct rpc_xprt *xprt)
437{
438 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
439
440 dprintk("RPC: %s: closing\n", __func__);
Tom Talpey08ca0dc2008-10-10 11:32:34 -0400441 if (r_xprt->rx_ep.rep_connected > 0)
442 xprt->reestablish_timeout = 0;
Trond Myklebust62da3b22007-11-06 18:44:20 -0500443 xprt_disconnect_done(xprt);
Chuck Lever282191c2014-07-29 17:25:55 -0400444 rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400445}
446
447static void
448xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port)
449{
450 struct sockaddr_in *sap;
451
452 sap = (struct sockaddr_in *)&xprt->addr;
453 sap->sin_port = htons(port);
454 sap = (struct sockaddr_in *)&rpcx_to_rdmad(xprt).addr;
455 sap->sin_port = htons(port);
456 dprintk("RPC: %s: %u\n", __func__, port);
457}
458
459static void
Trond Myklebust1b092092013-01-08 09:26:49 -0500460xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400461{
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400462 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
463
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400464 if (r_xprt->rx_ep.rep_connected != 0) {
465 /* Reconnect */
Chuck Lever5abefb82015-01-21 11:02:37 -0500466 schedule_delayed_work(&r_xprt->rx_connect_worker,
467 xprt->reestablish_timeout);
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400468 xprt->reestablish_timeout <<= 1;
Chuck Leverbfaee092014-05-28 10:34:32 -0400469 if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO)
470 xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO;
471 else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO)
472 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400473 } else {
Chuck Lever5abefb82015-01-21 11:02:37 -0500474 schedule_delayed_work(&r_xprt->rx_connect_worker, 0);
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400475 if (!RPC_IS_ASYNC(task))
Chuck Lever5abefb82015-01-21 11:02:37 -0500476 flush_delayed_work(&r_xprt->rx_connect_worker);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400477 }
478}
479
Chuck Lever9c40c492016-09-15 10:55:53 -0400480/* Allocate a fixed-size buffer in which to construct and send the
481 * RPC-over-RDMA header for this request.
482 */
483static bool
484rpcrdma_get_rdmabuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
485 gfp_t flags)
486{
Chuck Lever08cf2ef2016-09-15 10:56:02 -0400487 size_t size = RPCRDMA_HDRBUF_SIZE;
Chuck Lever9c40c492016-09-15 10:55:53 -0400488 struct rpcrdma_regbuf *rb;
489
490 if (req->rl_rdmabuf)
491 return true;
492
Chuck Lever13650c22016-09-15 10:56:26 -0400493 rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, flags);
Chuck Lever9c40c492016-09-15 10:55:53 -0400494 if (IS_ERR(rb))
495 return false;
496
497 r_xprt->rx_stats.hardway_register_count += size;
498 req->rl_rdmabuf = rb;
499 return true;
500}
501
502/* RPC/RDMA marshaling may choose to send payload bearing ops inline,
503 * if the resulting Call message is smaller than the inline threshold.
504 * The value of the "rq_callsize" argument accounts for RPC header
505 * requirements, but not for the data payload in these cases.
506 *
507 * See rpcrdma_inline_pullup.
508 */
509static bool
510rpcrdma_get_sendbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
511 size_t size, gfp_t flags)
512{
513 struct rpcrdma_regbuf *rb;
514 size_t min_size;
515
516 if (req->rl_sendbuf && rdmab_length(req->rl_sendbuf) >= size)
517 return true;
518
519 min_size = max_t(size_t, size, r_xprt->rx_data.inline_wsize);
Chuck Lever13650c22016-09-15 10:56:26 -0400520 rb = rpcrdma_alloc_regbuf(min_size, DMA_TO_DEVICE, flags);
Chuck Lever9c40c492016-09-15 10:55:53 -0400521 if (IS_ERR(rb))
522 return false;
523
Chuck Lever13650c22016-09-15 10:56:26 -0400524 rpcrdma_free_regbuf(req->rl_sendbuf);
Chuck Lever9c40c492016-09-15 10:55:53 -0400525 r_xprt->rx_stats.hardway_register_count += min_size;
526 req->rl_sendbuf = rb;
527 return true;
528}
529
530/* The rq_rcv_buf is used only if a Reply chunk is necessary.
531 * The decision to use a Reply chunk is made later in
532 * rpcrdma_marshal_req. This buffer is registered at that time.
533 *
534 * Otherwise, the associated RPC Reply arrives in a separate
535 * Receive buffer, arbitrarily chosen by the HCA. The buffer
536 * allocated here for the RPC Reply is not utilized in that
537 * case. See rpcrdma_inline_fixup.
538 *
539 * A regbuf is used here to remember the buffer size.
540 */
541static bool
542rpcrdma_get_recvbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
543 size_t size, gfp_t flags)
544{
545 struct rpcrdma_regbuf *rb;
546
547 if (req->rl_recvbuf && rdmab_length(req->rl_recvbuf) >= size)
548 return true;
549
Chuck Lever13650c22016-09-15 10:56:26 -0400550 rb = rpcrdma_alloc_regbuf(size, DMA_NONE, flags);
Chuck Lever9c40c492016-09-15 10:55:53 -0400551 if (IS_ERR(rb))
552 return false;
553
Chuck Lever13650c22016-09-15 10:56:26 -0400554 rpcrdma_free_regbuf(req->rl_recvbuf);
Chuck Lever9c40c492016-09-15 10:55:53 -0400555 r_xprt->rx_stats.hardway_register_count += size;
556 req->rl_recvbuf = rb;
557 return true;
558}
559
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400560/**
561 * xprt_rdma_allocate - allocate transport resources for an RPC
562 * @task: RPC task
563 *
564 * Return values:
565 * 0: Success; rq_buffer points to RPC buffer to use
566 * ENOMEM: Out of memory, call again later
567 * EIO: A permanent error occurred, do not retry
568 *
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400569 * The RDMA allocate/free functions need the task structure as a place
Chuck Lever9c40c492016-09-15 10:55:53 -0400570 * to hide the struct rpcrdma_req, which is necessary for the actual
571 * send/recv sequence.
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500572 *
Chuck Lever9c40c492016-09-15 10:55:53 -0400573 * xprt_rdma_allocate provides buffers that are already mapped for
574 * DMA, and a local DMA lkey is provided for each.
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400575 */
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400576static int
577xprt_rdma_allocate(struct rpc_task *task)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400578{
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400579 struct rpc_rqst *rqst = task->tk_rqstp;
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400580 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500581 struct rpcrdma_req *req;
Chuck Levera0a1d502015-01-26 17:11:47 -0500582 gfp_t flags;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400583
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500584 req = rpcrdma_buffer_get(&r_xprt->rx_buf);
Chuck Leverc977dea2014-05-28 10:35:06 -0400585 if (req == NULL)
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400586 return -ENOMEM;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400587
Chuck Lever5d252f92016-01-07 14:50:10 -0500588 flags = RPCRDMA_DEF_GFP;
Chuck Levera0a1d502015-01-26 17:11:47 -0500589 if (RPC_IS_SWAPPER(task))
590 flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN;
591
Chuck Lever9c40c492016-09-15 10:55:53 -0400592 if (!rpcrdma_get_rdmabuf(r_xprt, req, flags))
593 goto out_fail;
594 if (!rpcrdma_get_sendbuf(r_xprt, req, rqst->rq_callsize, flags))
595 goto out_fail;
596 if (!rpcrdma_get_recvbuf(r_xprt, req, rqst->rq_rcvsize, flags))
597 goto out_fail;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400598
Chuck Lever9c40c492016-09-15 10:55:53 -0400599 dprintk("RPC: %5u %s: send size = %zd, recv size = %zd, req = %p\n",
600 task->tk_pid, __func__, rqst->rq_callsize,
601 rqst->rq_rcvsize, req);
602
Tom Talpey575448b2008-10-09 15:00:40 -0400603 req->rl_connect_cookie = 0; /* our reserved value */
Chuck Lever5a6d1db2016-09-15 10:55:45 -0400604 rpcrdma_set_xprtdata(rqst, req);
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400605 rqst->rq_buffer = req->rl_sendbuf->rg_base;
Chuck Lever9c40c492016-09-15 10:55:53 -0400606 rqst->rq_rbuffer = req->rl_recvbuf->rg_base;
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400607 return 0;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400608
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500609out_fail:
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400610 rpcrdma_buffer_put(req);
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400611 return -ENOMEM;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400612}
613
Chuck Lever3435c742016-09-15 10:55:29 -0400614/**
615 * xprt_rdma_free - release resources allocated by xprt_rdma_allocate
616 * @task: RPC task
617 *
618 * Caller guarantees rqst->rq_buffer is non-NULL.
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400619 */
620static void
Chuck Lever3435c742016-09-15 10:55:29 -0400621xprt_rdma_free(struct rpc_task *task)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400622{
Chuck Lever3435c742016-09-15 10:55:29 -0400623 struct rpc_rqst *rqst = task->tk_rqstp;
624 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
625 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400626
Chuck Leverffc4d9b2015-12-16 17:22:14 -0500627 if (req->rl_backchannel)
628 return;
629
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500630 dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400631
Chuck Leveread3f262016-05-02 14:42:46 -0400632 r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req,
Chuck Lever3435c742016-09-15 10:55:29 -0400633 !RPC_IS_ASYNC(task));
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400634 rpcrdma_buffer_put(req);
635}
636
Chuck Lever7a89f9c2016-06-29 13:53:43 -0400637/**
638 * xprt_rdma_send_request - marshal and send an RPC request
639 * @task: RPC task with an RPC message in rq_snd_buf
640 *
641 * Return values:
642 * 0: The request has been sent
643 * ENOTCONN: Caller needs to invoke connect logic then call again
644 * ENOBUFS: Call again later to send the request
645 * EIO: A permanent error occurred. The request was not sent,
646 * and don't try it again
647 *
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400648 * send_request invokes the meat of RPC RDMA. It must do the following:
Chuck Lever7a89f9c2016-06-29 13:53:43 -0400649 *
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400650 * 1. Marshal the RPC request into an RPC RDMA request, which means
651 * putting a header in front of data, and creating IOVs for RDMA
652 * from those in the request.
653 * 2. In marshaling, detect opportunities for RDMA, and use them.
654 * 3. Post a recv message to set up asynch completion, then send
655 * the request (rpcrdma_ep_post).
656 * 4. No partial sends are possible in the RPC-RDMA protocol (as in UDP).
657 */
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400658static int
659xprt_rdma_send_request(struct rpc_task *task)
660{
661 struct rpc_rqst *rqst = task->tk_rqstp;
Trond Myklebusta4f08352013-01-08 09:10:21 -0500662 struct rpc_xprt *xprt = rqst->rq_xprt;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400663 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
664 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
Chuck Lever6ab59942014-07-29 17:23:43 -0400665 int rc = 0;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400666
Chuck Lever9d6b0402016-06-29 13:54:16 -0400667 /* On retransmit, remove any previously registered chunks */
668 r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, false);
669
Chuck Levere2377942015-03-30 14:33:53 -0400670 rc = rpcrdma_marshal_req(rqst);
Chuck Lever6ab59942014-07-29 17:23:43 -0400671 if (rc < 0)
672 goto failed_marshal;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400673
674 if (req->rl_reply == NULL) /* e.g. reconnection */
675 rpcrdma_recv_buffer_get(req);
676
Tom Talpey575448b2008-10-09 15:00:40 -0400677 /* Must suppress retransmit to maintain credits */
678 if (req->rl_connect_cookie == xprt->connect_cookie)
679 goto drop_connection;
680 req->rl_connect_cookie = xprt->connect_cookie;
681
682 if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
683 goto drop_connection;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400684
Trond Myklebustd60dbb22010-05-13 12:51:49 -0400685 rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400686 rqst->rq_bytes_sent = 0;
687 return 0;
Tom Talpey575448b2008-10-09 15:00:40 -0400688
Chuck Leverc93c6222014-05-28 10:35:14 -0400689failed_marshal:
Chuck Leverc93c6222014-05-28 10:35:14 -0400690 dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n",
691 __func__, rc);
692 if (rc == -EIO)
Chuck Lever7a89f9c2016-06-29 13:53:43 -0400693 r_xprt->rx_stats.failed_marshal_count++;
694 if (rc != -ENOTCONN)
695 return rc;
Tom Talpey575448b2008-10-09 15:00:40 -0400696drop_connection:
697 xprt_disconnect_done(xprt);
698 return -ENOTCONN; /* implies disconnect */
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400699}
700
Chuck Lever5d252f92016-01-07 14:50:10 -0500701void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400702{
703 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
704 long idle_time = 0;
705
706 if (xprt_connected(xprt))
707 idle_time = (long)(jiffies - xprt->last_used) / HZ;
708
Chuck Lever763f7e42015-08-03 13:04:36 -0400709 seq_puts(seq, "\txprt:\trdma ");
710 seq_printf(seq, "%u %lu %lu %lu %ld %lu %lu %lu %llu %llu ",
711 0, /* need a local port? */
712 xprt->stat.bind_count,
713 xprt->stat.connect_count,
714 xprt->stat.connect_time,
715 idle_time,
716 xprt->stat.sends,
717 xprt->stat.recvs,
718 xprt->stat.bad_xids,
719 xprt->stat.req_u,
720 xprt->stat.bklog_u);
Chuck Lever505bbe62016-06-29 13:52:54 -0400721 seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu %lu ",
Chuck Lever763f7e42015-08-03 13:04:36 -0400722 r_xprt->rx_stats.read_chunk_count,
723 r_xprt->rx_stats.write_chunk_count,
724 r_xprt->rx_stats.reply_chunk_count,
725 r_xprt->rx_stats.total_rdma_request,
726 r_xprt->rx_stats.total_rdma_reply,
727 r_xprt->rx_stats.pullup_copy_count,
728 r_xprt->rx_stats.fixup_copy_count,
729 r_xprt->rx_stats.hardway_register_count,
730 r_xprt->rx_stats.failed_marshal_count,
Chuck Lever860477d2015-08-03 13:04:45 -0400731 r_xprt->rx_stats.bad_reply_count,
732 r_xprt->rx_stats.nomsg_call_count);
Chuck Leverc8b920b2016-09-15 10:57:16 -0400733 seq_printf(seq, "%lu %lu %lu %lu\n",
Chuck Lever505bbe62016-06-29 13:52:54 -0400734 r_xprt->rx_stats.mrs_recovered,
Chuck Levere2ac2362016-06-29 13:54:00 -0400735 r_xprt->rx_stats.mrs_orphaned,
Chuck Leverc8b920b2016-09-15 10:57:16 -0400736 r_xprt->rx_stats.mrs_allocated,
737 r_xprt->rx_stats.local_inv_needed);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400738}
739
Jeff Laytond67fa4d2015-06-03 16:14:29 -0400740static int
741xprt_rdma_enable_swap(struct rpc_xprt *xprt)
742{
Chuck Levera0451782015-10-24 17:26:29 -0400743 return 0;
Jeff Laytond67fa4d2015-06-03 16:14:29 -0400744}
745
746static void
747xprt_rdma_disable_swap(struct rpc_xprt *xprt)
748{
749}
750
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400751/*
752 * Plumbing for rpc transport switch and kernel module
753 */
754
755static struct rpc_xprt_ops xprt_rdma_procs = {
Chuck Levere7ce7102014-05-28 10:34:57 -0400756 .reserve_xprt = xprt_reserve_xprt_cong,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400757 .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */
Trond Myklebustf39c1bf2012-09-07 11:08:50 -0400758 .alloc_slot = xprt_alloc_slot,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400759 .release_request = xprt_release_rqst_cong, /* ditto */
760 .set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */
761 .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */
762 .set_port = xprt_rdma_set_port,
763 .connect = xprt_rdma_connect,
764 .buf_alloc = xprt_rdma_allocate,
765 .buf_free = xprt_rdma_free,
766 .send_request = xprt_rdma_send_request,
767 .close = xprt_rdma_close,
768 .destroy = xprt_rdma_destroy,
Jeff Laytond67fa4d2015-06-03 16:14:29 -0400769 .print_stats = xprt_rdma_print_stats,
770 .enable_swap = xprt_rdma_enable_swap,
771 .disable_swap = xprt_rdma_disable_swap,
Chuck Leverf531a5d2015-10-24 17:27:43 -0400772 .inject_disconnect = xprt_rdma_inject_disconnect,
773#if defined(CONFIG_SUNRPC_BACKCHANNEL)
774 .bc_setup = xprt_rdma_bc_setup,
Chuck Lever76566772015-10-24 17:28:32 -0400775 .bc_up = xprt_rdma_bc_up,
Chuck Lever6b26cc82016-05-02 14:40:40 -0400776 .bc_maxpayload = xprt_rdma_bc_maxpayload,
Chuck Leverf531a5d2015-10-24 17:27:43 -0400777 .bc_free_rqst = xprt_rdma_bc_free_rqst,
778 .bc_destroy = xprt_rdma_bc_destroy,
779#endif
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400780};
781
782static struct xprt_class xprt_rdma = {
783 .list = LIST_HEAD_INIT(xprt_rdma.list),
784 .name = "rdma",
785 .owner = THIS_MODULE,
786 .ident = XPRT_TRANSPORT_RDMA,
787 .setup = xprt_setup_rdma,
788};
789
Chuck Leverffe1f0d2015-06-04 11:21:42 -0400790void xprt_rdma_cleanup(void)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400791{
792 int rc;
793
Chuck Lever3a0799a2014-03-12 12:51:39 -0400794 dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
Jeff Laytonf895b252014-11-17 16:58:04 -0500795#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400796 if (sunrpc_table_header) {
797 unregister_sysctl_table(sunrpc_table_header);
798 sunrpc_table_header = NULL;
799 }
800#endif
801 rc = xprt_unregister_transport(&xprt_rdma);
802 if (rc)
803 dprintk("RPC: %s: xprt_unregister returned %i\n",
804 __func__, rc);
Chuck Lever951e7212015-05-26 11:52:25 -0400805
Chuck Leverfe97b472015-10-24 17:27:10 -0400806 rpcrdma_destroy_wq();
Chuck Lever5d252f92016-01-07 14:50:10 -0500807
808 rc = xprt_unregister_transport(&xprt_rdma_bc);
809 if (rc)
810 dprintk("RPC: %s: xprt_unregister(bc) returned %i\n",
811 __func__, rc);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400812}
813
Chuck Leverffe1f0d2015-06-04 11:21:42 -0400814int xprt_rdma_init(void)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400815{
816 int rc;
817
Chuck Lever505bbe62016-06-29 13:52:54 -0400818 rc = rpcrdma_alloc_wq();
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400819 if (rc)
820 return rc;
821
Chuck Lever951e7212015-05-26 11:52:25 -0400822 rc = xprt_register_transport(&xprt_rdma);
823 if (rc) {
Chuck Leverfe97b472015-10-24 17:27:10 -0400824 rpcrdma_destroy_wq();
Chuck Lever951e7212015-05-26 11:52:25 -0400825 return rc;
826 }
827
Chuck Lever5d252f92016-01-07 14:50:10 -0500828 rc = xprt_register_transport(&xprt_rdma_bc);
829 if (rc) {
830 xprt_unregister_transport(&xprt_rdma);
831 rpcrdma_destroy_wq();
Chuck Lever5d252f92016-01-07 14:50:10 -0500832 return rc;
833 }
834
Chuck Lever3a0799a2014-03-12 12:51:39 -0400835 dprintk("RPCRDMA Module Init, register RPC RDMA transport\n");
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400836
Chuck Lever3a0799a2014-03-12 12:51:39 -0400837 dprintk("Defaults:\n");
838 dprintk("\tSlots %d\n"
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400839 "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n",
840 xprt_rdma_slot_table_entries,
841 xprt_rdma_max_inline_read, xprt_rdma_max_inline_write);
Chuck Lever3a0799a2014-03-12 12:51:39 -0400842 dprintk("\tPadding %d\n\tMemreg %d\n",
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400843 xprt_rdma_inline_write_padding, xprt_rdma_memreg_strategy);
844
Jeff Laytonf895b252014-11-17 16:58:04 -0500845#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400846 if (!sunrpc_table_header)
847 sunrpc_table_header = register_sysctl_table(sunrpc_table);
848#endif
849 return 0;
850}