blob: c717f54107768902db7c571ce65f4019624c7bcc [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 Leverc95a3c62017-02-08 17:00:02 -050070 int xprt_rdma_pad_optimize = 0;
\"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,
Chuck Lever44829d02016-09-15 10:57:32 -0400100 .proc_handler = proc_dointvec_minmax,
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,
Chuck Lever44829d02016-09-15 10:57:32 -0400109 .proc_handler = proc_dointvec_minmax,
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
Chuck Lever3a72dc72016-11-29 10:53:37 -0500222void
223rpcrdma_conn_func(struct rpcrdma_ep *ep)
224{
225 schedule_delayed_work(&ep->rep_connect_worker, 0);
226}
227
228void
229rpcrdma_connect_worker(struct work_struct *work)
230{
231 struct rpcrdma_ep *ep =
232 container_of(work, struct rpcrdma_ep, rep_connect_worker.work);
233 struct rpcrdma_xprt *r_xprt =
234 container_of(ep, struct rpcrdma_xprt, rx_ep);
235 struct rpc_xprt *xprt = &r_xprt->rx_xprt;
236
237 spin_lock_bh(&xprt->transport_lock);
238 if (++xprt->connect_cookie == 0) /* maintain a reserved value */
239 ++xprt->connect_cookie;
240 if (ep->rep_connected > 0) {
241 if (!xprt_test_and_set_connected(xprt))
242 xprt_wake_pending_tasks(xprt, 0);
243 } else {
244 if (xprt_test_and_clear_connected(xprt))
245 xprt_wake_pending_tasks(xprt, -ENOTCONN);
246 }
247 spin_unlock_bh(&xprt->transport_lock);
248}
249
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400250static void
251xprt_rdma_connect_worker(struct work_struct *work)
252{
Chuck Lever5abefb82015-01-21 11:02:37 -0500253 struct rpcrdma_xprt *r_xprt = container_of(work, struct rpcrdma_xprt,
254 rx_connect_worker.work);
255 struct rpc_xprt *xprt = &r_xprt->rx_xprt;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400256 int rc = 0;
257
Trond Myklebustd19751e2012-09-11 17:21:25 -0400258 xprt_clear_connected(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400259
Trond Myklebustd19751e2012-09-11 17:21:25 -0400260 dprintk("RPC: %s: %sconnect\n", __func__,
261 r_xprt->rx_ep.rep_connected != 0 ? "re" : "");
262 rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia);
263 if (rc)
264 xprt_wake_pending_tasks(xprt, rc);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400265
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400266 dprintk("RPC: %s: exit\n", __func__);
267 xprt_clear_connecting(xprt);
268}
269
Chuck Lever4a068252015-05-11 14:02:25 -0400270static void
271xprt_rdma_inject_disconnect(struct rpc_xprt *xprt)
272{
273 struct rpcrdma_xprt *r_xprt = container_of(xprt, struct rpcrdma_xprt,
274 rx_xprt);
275
276 pr_info("rpcrdma: injecting transport disconnect on xprt=%p\n", xprt);
277 rdma_disconnect(r_xprt->rx_ia.ri_id);
278}
279
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400280/*
281 * xprt_rdma_destroy
282 *
283 * Destroy the xprt.
284 * Free all memory associated with the object, including its own.
285 * NOTE: none of the *destroy methods free memory for their top-level
286 * objects, even though they may have allocated it (they do free
287 * private memory). It's up to the caller to handle it. In this
288 * case (RDMA transport), all structure memory is inlined with the
289 * struct rpcrdma_xprt.
290 */
291static void
292xprt_rdma_destroy(struct rpc_xprt *xprt)
293{
294 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400295
296 dprintk("RPC: %s: called\n", __func__);
297
Chuck Lever5abefb82015-01-21 11:02:37 -0500298 cancel_delayed_work_sync(&r_xprt->rx_connect_worker);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400299
300 xprt_clear_connected(xprt);
301
Chuck Lever7f1d5412014-05-28 10:33:16 -0400302 rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia);
Steve Wise72c02172015-09-21 12:24:23 -0500303 rpcrdma_buffer_destroy(&r_xprt->rx_buf);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400304 rpcrdma_ia_close(&r_xprt->rx_ia);
305
306 xprt_rdma_free_addresses(xprt);
307
Pavel Emelyanove204e622010-09-29 16:03:13 +0400308 xprt_free(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400309
310 dprintk("RPC: %s: returning\n", __func__);
311
312 module_put(THIS_MODULE);
313}
314
Trond Myklebust2881ae72007-12-20 16:03:54 -0500315static const struct rpc_timeout xprt_rdma_default_timeout = {
316 .to_initval = 60 * HZ,
317 .to_maxval = 60 * HZ,
318};
319
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400320/**
321 * xprt_setup_rdma - Set up transport to use RDMA
322 *
323 * @args: rpc transport arguments
324 */
325static struct rpc_xprt *
326xprt_setup_rdma(struct xprt_create *args)
327{
328 struct rpcrdma_create_data_internal cdata;
329 struct rpc_xprt *xprt;
330 struct rpcrdma_xprt *new_xprt;
331 struct rpcrdma_ep *new_ep;
Chuck Lever5231eb92015-08-03 13:02:41 -0400332 struct sockaddr *sap;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400333 int rc;
334
335 if (args->addrlen > sizeof(xprt->addr)) {
336 dprintk("RPC: %s: address too large\n", __func__);
337 return ERR_PTR(-EBADF);
338 }
339
Pavel Emelyanov37aa2132010-09-29 16:05:43 +0400340 xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt),
Trond Myklebustd9ba1312011-07-17 18:11:30 -0400341 xprt_rdma_slot_table_entries,
Pavel Emelyanovbd1722d2010-09-29 16:02:43 +0400342 xprt_rdma_slot_table_entries);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400343 if (xprt == NULL) {
344 dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n",
345 __func__);
346 return ERR_PTR(-ENOMEM);
347 }
348
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400349 /* 60 second timeout, no retries */
Trond Myklebustba7392b2007-12-20 16:03:55 -0500350 xprt->timeout = &xprt_rdma_default_timeout;
Chuck Leverbfaee092014-05-28 10:34:32 -0400351 xprt->bind_timeout = RPCRDMA_BIND_TO;
352 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
353 xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400354
355 xprt->resvport = 0; /* privileged port not needed */
356 xprt->tsh_size = 0; /* RPC-RDMA handles framing */
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400357 xprt->ops = &xprt_rdma_procs;
358
359 /*
360 * Set up RDMA-specific connect data.
361 */
362
Chuck Lever5231eb92015-08-03 13:02:41 -0400363 sap = (struct sockaddr *)&cdata.addr;
364 memcpy(sap, args->dstaddr, args->addrlen);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400365
366 /* Ensure xprt->addr holds valid server TCP (not RDMA)
367 * address, for any side protocols which peek at it */
368 xprt->prot = IPPROTO_TCP;
369 xprt->addrlen = args->addrlen;
Chuck Lever5231eb92015-08-03 13:02:41 -0400370 memcpy(&xprt->addr, sap, xprt->addrlen);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400371
Chuck Lever5231eb92015-08-03 13:02:41 -0400372 if (rpc_get_port(sap))
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400373 xprt_set_bound(xprt);
374
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400375 cdata.max_requests = xprt->max_reqs;
376
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400377 cdata.rsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA write max */
378 cdata.wsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA read max */
379
380 cdata.inline_wsize = xprt_rdma_max_inline_write;
381 if (cdata.inline_wsize > cdata.wsize)
382 cdata.inline_wsize = cdata.wsize;
383
384 cdata.inline_rsize = xprt_rdma_max_inline_read;
385 if (cdata.inline_rsize > cdata.rsize)
386 cdata.inline_rsize = cdata.rsize;
387
388 cdata.padding = xprt_rdma_inline_write_padding;
389
390 /*
391 * Create new transport instance, which includes initialized
392 * o ia
393 * o endpoint
394 * o buffers
395 */
396
397 new_xprt = rpcx_to_rdmax(xprt);
398
Chuck Lever5231eb92015-08-03 13:02:41 -0400399 rc = rpcrdma_ia_open(new_xprt, sap, xprt_rdma_memreg_strategy);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400400 if (rc)
401 goto out1;
402
403 /*
404 * initialize and create ep
405 */
406 new_xprt->rx_data = cdata;
407 new_ep = &new_xprt->rx_ep;
408 new_ep->rep_remote_addr = cdata.addr;
409
410 rc = rpcrdma_ep_create(&new_xprt->rx_ep,
411 &new_xprt->rx_ia, &new_xprt->rx_data);
412 if (rc)
413 goto out2;
414
415 /*
416 * Allocate pre-registered send and receive buffers for headers and
417 * any inline data. Also specify any padding which will be provided
418 * from a preregistered zero buffer.
419 */
Chuck Leverac920d02015-01-21 11:03:44 -0500420 rc = rpcrdma_buffer_create(new_xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400421 if (rc)
422 goto out3;
423
424 /*
425 * Register a callback for connection events. This is necessary because
426 * connection loss notification is async. We also catch connection loss
427 * when reaping receives.
428 */
Chuck Lever5abefb82015-01-21 11:02:37 -0500429 INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
430 xprt_rdma_connect_worker);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400431
Chuck Lever5231eb92015-08-03 13:02:41 -0400432 xprt_rdma_format_addresses(xprt, sap);
Chuck Lever1c9351e2015-03-30 14:34:30 -0400433 xprt->max_payload = new_xprt->rx_ia.ri_ops->ro_maxpages(new_xprt);
434 if (xprt->max_payload == 0)
435 goto out4;
436 xprt->max_payload <<= PAGE_SHIFT;
Chuck Lever43e95982014-07-29 17:23:34 -0400437 dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
438 __func__, xprt->max_payload);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400439
440 if (!try_module_get(THIS_MODULE))
441 goto out4;
442
Chuck Lever5231eb92015-08-03 13:02:41 -0400443 dprintk("RPC: %s: %s:%s\n", __func__,
444 xprt->address_strings[RPC_DISPLAY_ADDR],
445 xprt->address_strings[RPC_DISPLAY_PORT]);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400446 return xprt;
447
448out4:
449 xprt_rdma_free_addresses(xprt);
450 rc = -EINVAL;
451out3:
Chuck Lever7f1d5412014-05-28 10:33:16 -0400452 rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400453out2:
454 rpcrdma_ia_close(&new_xprt->rx_ia);
455out1:
Pavel Emelyanove204e622010-09-29 16:03:13 +0400456 xprt_free(xprt);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400457 return ERR_PTR(rc);
458}
459
460/*
461 * Close a connection, during shutdown or timeout/reconnect
462 */
463static void
464xprt_rdma_close(struct rpc_xprt *xprt)
465{
466 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
467
468 dprintk("RPC: %s: closing\n", __func__);
Tom Talpey08ca0dc2008-10-10 11:32:34 -0400469 if (r_xprt->rx_ep.rep_connected > 0)
470 xprt->reestablish_timeout = 0;
Trond Myklebust62da3b22007-11-06 18:44:20 -0500471 xprt_disconnect_done(xprt);
Chuck Lever282191c2014-07-29 17:25:55 -0400472 rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400473}
474
475static void
476xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port)
477{
478 struct sockaddr_in *sap;
479
480 sap = (struct sockaddr_in *)&xprt->addr;
481 sap->sin_port = htons(port);
482 sap = (struct sockaddr_in *)&rpcx_to_rdmad(xprt).addr;
483 sap->sin_port = htons(port);
484 dprintk("RPC: %s: %u\n", __func__, port);
485}
486
487static void
Trond Myklebust1b092092013-01-08 09:26:49 -0500488xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400489{
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400490 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
491
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400492 if (r_xprt->rx_ep.rep_connected != 0) {
493 /* Reconnect */
Chuck Lever5abefb82015-01-21 11:02:37 -0500494 schedule_delayed_work(&r_xprt->rx_connect_worker,
495 xprt->reestablish_timeout);
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400496 xprt->reestablish_timeout <<= 1;
Chuck Leverbfaee092014-05-28 10:34:32 -0400497 if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO)
498 xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO;
499 else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO)
500 xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO;
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400501 } else {
Chuck Lever5abefb82015-01-21 11:02:37 -0500502 schedule_delayed_work(&r_xprt->rx_connect_worker, 0);
Trond Myklebust0b9e7942010-04-16 16:41:57 -0400503 if (!RPC_IS_ASYNC(task))
Chuck Lever5abefb82015-01-21 11:02:37 -0500504 flush_delayed_work(&r_xprt->rx_connect_worker);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400505 }
506}
507
Chuck Lever9c40c492016-09-15 10:55:53 -0400508/* Allocate a fixed-size buffer in which to construct and send the
509 * RPC-over-RDMA header for this request.
510 */
511static bool
512rpcrdma_get_rdmabuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
513 gfp_t flags)
514{
Chuck Lever08cf2ef2016-09-15 10:56:02 -0400515 size_t size = RPCRDMA_HDRBUF_SIZE;
Chuck Lever9c40c492016-09-15 10:55:53 -0400516 struct rpcrdma_regbuf *rb;
517
518 if (req->rl_rdmabuf)
519 return true;
520
Chuck Lever13650c22016-09-15 10:56:26 -0400521 rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, flags);
Chuck Lever9c40c492016-09-15 10:55:53 -0400522 if (IS_ERR(rb))
523 return false;
524
525 r_xprt->rx_stats.hardway_register_count += size;
526 req->rl_rdmabuf = rb;
527 return true;
528}
529
Chuck Lever9c40c492016-09-15 10:55:53 -0400530static bool
531rpcrdma_get_sendbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
532 size_t size, gfp_t flags)
533{
534 struct rpcrdma_regbuf *rb;
Chuck Lever9c40c492016-09-15 10:55:53 -0400535
536 if (req->rl_sendbuf && rdmab_length(req->rl_sendbuf) >= size)
537 return true;
538
Chuck Lever655fec62016-09-15 10:57:24 -0400539 rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, flags);
Chuck Lever9c40c492016-09-15 10:55:53 -0400540 if (IS_ERR(rb))
541 return false;
542
Chuck Lever13650c22016-09-15 10:56:26 -0400543 rpcrdma_free_regbuf(req->rl_sendbuf);
Chuck Lever655fec62016-09-15 10:57:24 -0400544 r_xprt->rx_stats.hardway_register_count += size;
Chuck Lever9c40c492016-09-15 10:55:53 -0400545 req->rl_sendbuf = rb;
546 return true;
547}
548
549/* The rq_rcv_buf is used only if a Reply chunk is necessary.
550 * The decision to use a Reply chunk is made later in
551 * rpcrdma_marshal_req. This buffer is registered at that time.
552 *
553 * Otherwise, the associated RPC Reply arrives in a separate
554 * Receive buffer, arbitrarily chosen by the HCA. The buffer
555 * allocated here for the RPC Reply is not utilized in that
556 * case. See rpcrdma_inline_fixup.
557 *
558 * A regbuf is used here to remember the buffer size.
559 */
560static bool
561rpcrdma_get_recvbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
562 size_t size, gfp_t flags)
563{
564 struct rpcrdma_regbuf *rb;
565
566 if (req->rl_recvbuf && rdmab_length(req->rl_recvbuf) >= size)
567 return true;
568
Chuck Lever13650c22016-09-15 10:56:26 -0400569 rb = rpcrdma_alloc_regbuf(size, DMA_NONE, flags);
Chuck Lever9c40c492016-09-15 10:55:53 -0400570 if (IS_ERR(rb))
571 return false;
572
Chuck Lever13650c22016-09-15 10:56:26 -0400573 rpcrdma_free_regbuf(req->rl_recvbuf);
Chuck Lever9c40c492016-09-15 10:55:53 -0400574 r_xprt->rx_stats.hardway_register_count += size;
575 req->rl_recvbuf = rb;
576 return true;
577}
578
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400579/**
580 * xprt_rdma_allocate - allocate transport resources for an RPC
581 * @task: RPC task
582 *
583 * Return values:
584 * 0: Success; rq_buffer points to RPC buffer to use
585 * ENOMEM: Out of memory, call again later
586 * EIO: A permanent error occurred, do not retry
587 *
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400588 * The RDMA allocate/free functions need the task structure as a place
Chuck Lever9c40c492016-09-15 10:55:53 -0400589 * to hide the struct rpcrdma_req, which is necessary for the actual
590 * send/recv sequence.
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500591 *
Chuck Lever9c40c492016-09-15 10:55:53 -0400592 * xprt_rdma_allocate provides buffers that are already mapped for
593 * DMA, and a local DMA lkey is provided for each.
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400594 */
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400595static int
596xprt_rdma_allocate(struct rpc_task *task)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400597{
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400598 struct rpc_rqst *rqst = task->tk_rqstp;
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400599 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500600 struct rpcrdma_req *req;
Chuck Levera0a1d502015-01-26 17:11:47 -0500601 gfp_t flags;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400602
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500603 req = rpcrdma_buffer_get(&r_xprt->rx_buf);
Chuck Leverc977dea2014-05-28 10:35:06 -0400604 if (req == NULL)
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400605 return -ENOMEM;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400606
Chuck Lever5d252f92016-01-07 14:50:10 -0500607 flags = RPCRDMA_DEF_GFP;
Chuck Levera0a1d502015-01-26 17:11:47 -0500608 if (RPC_IS_SWAPPER(task))
609 flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN;
610
Chuck Lever9c40c492016-09-15 10:55:53 -0400611 if (!rpcrdma_get_rdmabuf(r_xprt, req, flags))
612 goto out_fail;
613 if (!rpcrdma_get_sendbuf(r_xprt, req, rqst->rq_callsize, flags))
614 goto out_fail;
615 if (!rpcrdma_get_recvbuf(r_xprt, req, rqst->rq_rcvsize, flags))
616 goto out_fail;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400617
Chuck Lever9c40c492016-09-15 10:55:53 -0400618 dprintk("RPC: %5u %s: send size = %zd, recv size = %zd, req = %p\n",
619 task->tk_pid, __func__, rqst->rq_callsize,
620 rqst->rq_rcvsize, req);
621
Tom Talpey575448b2008-10-09 15:00:40 -0400622 req->rl_connect_cookie = 0; /* our reserved value */
Chuck Lever5a6d1db2016-09-15 10:55:45 -0400623 rpcrdma_set_xprtdata(rqst, req);
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400624 rqst->rq_buffer = req->rl_sendbuf->rg_base;
Chuck Lever9c40c492016-09-15 10:55:53 -0400625 rqst->rq_rbuffer = req->rl_recvbuf->rg_base;
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400626 return 0;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400627
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500628out_fail:
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400629 rpcrdma_buffer_put(req);
Chuck Lever5fe6eaa2016-09-15 10:55:20 -0400630 return -ENOMEM;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400631}
632
Chuck Lever3435c742016-09-15 10:55:29 -0400633/**
634 * xprt_rdma_free - release resources allocated by xprt_rdma_allocate
635 * @task: RPC task
636 *
637 * Caller guarantees rqst->rq_buffer is non-NULL.
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400638 */
639static void
Chuck Lever3435c742016-09-15 10:55:29 -0400640xprt_rdma_free(struct rpc_task *task)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400641{
Chuck Lever3435c742016-09-15 10:55:29 -0400642 struct rpc_rqst *rqst = task->tk_rqstp;
643 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
644 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
Chuck Lever655fec62016-09-15 10:57:24 -0400645 struct rpcrdma_ia *ia = &r_xprt->rx_ia;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400646
Chuck Leverffc4d9b2015-12-16 17:22:14 -0500647 if (req->rl_backchannel)
648 return;
649
Chuck Lever0ca77dc2015-01-21 11:04:08 -0500650 dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400651
Chuck Lever48016dc2016-11-29 10:52:48 -0500652 if (unlikely(!list_empty(&req->rl_registered)))
653 ia->ri_ops->ro_unmap_safe(r_xprt, req, !RPC_IS_ASYNC(task));
Chuck Lever655fec62016-09-15 10:57:24 -0400654 rpcrdma_unmap_sges(ia, req);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400655 rpcrdma_buffer_put(req);
656}
657
Chuck Lever7a89f9c2016-06-29 13:53:43 -0400658/**
659 * xprt_rdma_send_request - marshal and send an RPC request
660 * @task: RPC task with an RPC message in rq_snd_buf
661 *
662 * Return values:
663 * 0: The request has been sent
664 * ENOTCONN: Caller needs to invoke connect logic then call again
665 * ENOBUFS: Call again later to send the request
666 * EIO: A permanent error occurred. The request was not sent,
667 * and don't try it again
668 *
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400669 * send_request invokes the meat of RPC RDMA. It must do the following:
Chuck Lever7a89f9c2016-06-29 13:53:43 -0400670 *
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400671 * 1. Marshal the RPC request into an RPC RDMA request, which means
672 * putting a header in front of data, and creating IOVs for RDMA
673 * from those in the request.
674 * 2. In marshaling, detect opportunities for RDMA, and use them.
675 * 3. Post a recv message to set up asynch completion, then send
676 * the request (rpcrdma_ep_post).
677 * 4. No partial sends are possible in the RPC-RDMA protocol (as in UDP).
678 */
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400679static int
680xprt_rdma_send_request(struct rpc_task *task)
681{
682 struct rpc_rqst *rqst = task->tk_rqstp;
Trond Myklebusta4f08352013-01-08 09:10:21 -0500683 struct rpc_xprt *xprt = rqst->rq_xprt;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400684 struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
685 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
Chuck Lever6ab59942014-07-29 17:23:43 -0400686 int rc = 0;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400687
Chuck Lever9d6b0402016-06-29 13:54:16 -0400688 /* On retransmit, remove any previously registered chunks */
Chuck Lever48016dc2016-11-29 10:52:48 -0500689 if (unlikely(!list_empty(&req->rl_registered)))
690 r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, false);
Chuck Lever9d6b0402016-06-29 13:54:16 -0400691
Chuck Levere2377942015-03-30 14:33:53 -0400692 rc = rpcrdma_marshal_req(rqst);
Chuck Lever6ab59942014-07-29 17:23:43 -0400693 if (rc < 0)
694 goto failed_marshal;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400695
696 if (req->rl_reply == NULL) /* e.g. reconnection */
697 rpcrdma_recv_buffer_get(req);
698
Tom Talpey575448b2008-10-09 15:00:40 -0400699 /* Must suppress retransmit to maintain credits */
700 if (req->rl_connect_cookie == xprt->connect_cookie)
701 goto drop_connection;
702 req->rl_connect_cookie = xprt->connect_cookie;
703
704 if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
705 goto drop_connection;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400706
Trond Myklebustd60dbb22010-05-13 12:51:49 -0400707 rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len;
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400708 rqst->rq_bytes_sent = 0;
709 return 0;
Tom Talpey575448b2008-10-09 15:00:40 -0400710
Chuck Leverc93c6222014-05-28 10:35:14 -0400711failed_marshal:
Chuck Lever7a89f9c2016-06-29 13:53:43 -0400712 if (rc != -ENOTCONN)
713 return rc;
Tom Talpey575448b2008-10-09 15:00:40 -0400714drop_connection:
715 xprt_disconnect_done(xprt);
716 return -ENOTCONN; /* implies disconnect */
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400717}
718
Chuck Lever5d252f92016-01-07 14:50:10 -0500719void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400720{
721 struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
722 long idle_time = 0;
723
724 if (xprt_connected(xprt))
725 idle_time = (long)(jiffies - xprt->last_used) / HZ;
726
Chuck Lever763f7e42015-08-03 13:04:36 -0400727 seq_puts(seq, "\txprt:\trdma ");
728 seq_printf(seq, "%u %lu %lu %lu %ld %lu %lu %lu %llu %llu ",
729 0, /* need a local port? */
730 xprt->stat.bind_count,
731 xprt->stat.connect_count,
732 xprt->stat.connect_time,
733 idle_time,
734 xprt->stat.sends,
735 xprt->stat.recvs,
736 xprt->stat.bad_xids,
737 xprt->stat.req_u,
738 xprt->stat.bklog_u);
Chuck Lever505bbe62016-06-29 13:52:54 -0400739 seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu %lu ",
Chuck Lever763f7e42015-08-03 13:04:36 -0400740 r_xprt->rx_stats.read_chunk_count,
741 r_xprt->rx_stats.write_chunk_count,
742 r_xprt->rx_stats.reply_chunk_count,
743 r_xprt->rx_stats.total_rdma_request,
744 r_xprt->rx_stats.total_rdma_reply,
745 r_xprt->rx_stats.pullup_copy_count,
746 r_xprt->rx_stats.fixup_copy_count,
747 r_xprt->rx_stats.hardway_register_count,
748 r_xprt->rx_stats.failed_marshal_count,
Chuck Lever860477d2015-08-03 13:04:45 -0400749 r_xprt->rx_stats.bad_reply_count,
750 r_xprt->rx_stats.nomsg_call_count);
Chuck Leverc8b920b2016-09-15 10:57:16 -0400751 seq_printf(seq, "%lu %lu %lu %lu\n",
Chuck Lever505bbe62016-06-29 13:52:54 -0400752 r_xprt->rx_stats.mrs_recovered,
Chuck Levere2ac2362016-06-29 13:54:00 -0400753 r_xprt->rx_stats.mrs_orphaned,
Chuck Leverc8b920b2016-09-15 10:57:16 -0400754 r_xprt->rx_stats.mrs_allocated,
755 r_xprt->rx_stats.local_inv_needed);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400756}
757
Jeff Laytond67fa4d2015-06-03 16:14:29 -0400758static int
759xprt_rdma_enable_swap(struct rpc_xprt *xprt)
760{
Chuck Levera0451782015-10-24 17:26:29 -0400761 return 0;
Jeff Laytond67fa4d2015-06-03 16:14:29 -0400762}
763
764static void
765xprt_rdma_disable_swap(struct rpc_xprt *xprt)
766{
767}
768
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400769/*
770 * Plumbing for rpc transport switch and kernel module
771 */
772
773static struct rpc_xprt_ops xprt_rdma_procs = {
Chuck Levere7ce7102014-05-28 10:34:57 -0400774 .reserve_xprt = xprt_reserve_xprt_cong,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400775 .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */
Trond Myklebustf39c1bf2012-09-07 11:08:50 -0400776 .alloc_slot = xprt_alloc_slot,
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400777 .release_request = xprt_release_rqst_cong, /* ditto */
778 .set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */
779 .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */
780 .set_port = xprt_rdma_set_port,
781 .connect = xprt_rdma_connect,
782 .buf_alloc = xprt_rdma_allocate,
783 .buf_free = xprt_rdma_free,
784 .send_request = xprt_rdma_send_request,
785 .close = xprt_rdma_close,
786 .destroy = xprt_rdma_destroy,
Jeff Laytond67fa4d2015-06-03 16:14:29 -0400787 .print_stats = xprt_rdma_print_stats,
788 .enable_swap = xprt_rdma_enable_swap,
789 .disable_swap = xprt_rdma_disable_swap,
Chuck Leverf531a5d2015-10-24 17:27:43 -0400790 .inject_disconnect = xprt_rdma_inject_disconnect,
791#if defined(CONFIG_SUNRPC_BACKCHANNEL)
792 .bc_setup = xprt_rdma_bc_setup,
Chuck Lever76566772015-10-24 17:28:32 -0400793 .bc_up = xprt_rdma_bc_up,
Chuck Lever6b26cc82016-05-02 14:40:40 -0400794 .bc_maxpayload = xprt_rdma_bc_maxpayload,
Chuck Leverf531a5d2015-10-24 17:27:43 -0400795 .bc_free_rqst = xprt_rdma_bc_free_rqst,
796 .bc_destroy = xprt_rdma_bc_destroy,
797#endif
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400798};
799
800static struct xprt_class xprt_rdma = {
801 .list = LIST_HEAD_INIT(xprt_rdma.list),
802 .name = "rdma",
803 .owner = THIS_MODULE,
804 .ident = XPRT_TRANSPORT_RDMA,
805 .setup = xprt_setup_rdma,
806};
807
Chuck Leverffe1f0d2015-06-04 11:21:42 -0400808void xprt_rdma_cleanup(void)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400809{
810 int rc;
811
Chuck Lever3a0799a2014-03-12 12:51:39 -0400812 dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
Jeff Laytonf895b252014-11-17 16:58:04 -0500813#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400814 if (sunrpc_table_header) {
815 unregister_sysctl_table(sunrpc_table_header);
816 sunrpc_table_header = NULL;
817 }
818#endif
819 rc = xprt_unregister_transport(&xprt_rdma);
820 if (rc)
821 dprintk("RPC: %s: xprt_unregister returned %i\n",
822 __func__, rc);
Chuck Lever951e7212015-05-26 11:52:25 -0400823
Chuck Leverfe97b472015-10-24 17:27:10 -0400824 rpcrdma_destroy_wq();
Chuck Lever5d252f92016-01-07 14:50:10 -0500825
826 rc = xprt_unregister_transport(&xprt_rdma_bc);
827 if (rc)
828 dprintk("RPC: %s: xprt_unregister(bc) returned %i\n",
829 __func__, rc);
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400830}
831
Chuck Leverffe1f0d2015-06-04 11:21:42 -0400832int xprt_rdma_init(void)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400833{
834 int rc;
835
Chuck Lever505bbe62016-06-29 13:52:54 -0400836 rc = rpcrdma_alloc_wq();
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400837 if (rc)
838 return rc;
839
Chuck Lever951e7212015-05-26 11:52:25 -0400840 rc = xprt_register_transport(&xprt_rdma);
841 if (rc) {
Chuck Leverfe97b472015-10-24 17:27:10 -0400842 rpcrdma_destroy_wq();
Chuck Lever951e7212015-05-26 11:52:25 -0400843 return rc;
844 }
845
Chuck Lever5d252f92016-01-07 14:50:10 -0500846 rc = xprt_register_transport(&xprt_rdma_bc);
847 if (rc) {
848 xprt_unregister_transport(&xprt_rdma);
849 rpcrdma_destroy_wq();
Chuck Lever5d252f92016-01-07 14:50:10 -0500850 return rc;
851 }
852
Chuck Lever3a0799a2014-03-12 12:51:39 -0400853 dprintk("RPCRDMA Module Init, register RPC RDMA transport\n");
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400854
Chuck Lever3a0799a2014-03-12 12:51:39 -0400855 dprintk("Defaults:\n");
856 dprintk("\tSlots %d\n"
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400857 "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n",
858 xprt_rdma_slot_table_entries,
859 xprt_rdma_max_inline_read, xprt_rdma_max_inline_write);
Chuck Lever3a0799a2014-03-12 12:51:39 -0400860 dprintk("\tPadding %d\n\tMemreg %d\n",
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400861 xprt_rdma_inline_write_padding, xprt_rdma_memreg_strategy);
862
Jeff Laytonf895b252014-11-17 16:58:04 -0500863#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
\"Talpey, Thomas\f58851e2007-09-10 13:50:12 -0400864 if (!sunrpc_table_header)
865 sunrpc_table_header = register_sysctl_table(sunrpc_table);
866#endif
867 return 0;
868}