Chuck Lever | a2268cf | 2018-05-04 15:34:32 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 2 | /* |
Chuck Lever | 62b56a6 | 2017-10-30 16:22:14 -0400 | [diff] [blame] | 3 | * Copyright (c) 2014-2017 Oracle. All rights reserved. |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 4 | * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved. |
| 5 | * |
| 6 | * This software is available to you under a choice of one of two |
| 7 | * licenses. You may choose to be licensed under the terms of the GNU |
| 8 | * General Public License (GPL) Version 2, available from the file |
| 9 | * COPYING in the main directory of this source tree, or the BSD-type |
| 10 | * license below: |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * |
| 16 | * Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * |
| 19 | * Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials provided |
| 22 | * with the distribution. |
| 23 | * |
| 24 | * Neither the name of the Network Appliance, Inc. nor the names of |
| 25 | * its contributors may be used to endorse or promote products |
| 26 | * derived from this software without specific prior written |
| 27 | * permission. |
| 28 | * |
| 29 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 30 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 31 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 32 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 33 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 34 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 35 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 36 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 37 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 38 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 39 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 40 | */ |
| 41 | |
| 42 | /* |
| 43 | * transport.c |
| 44 | * |
| 45 | * This file contains the top-level implementation of an RPC RDMA |
| 46 | * transport. |
| 47 | * |
| 48 | * Naming convention: functions beginning with xprt_ are part of the |
| 49 | * transport switch. All others are RPC RDMA internal. |
| 50 | */ |
| 51 | |
| 52 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 53 | #include <linux/slab.h> |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 54 | #include <linux/seq_file.h> |
Chuck Lever | bd2abef | 2018-05-07 15:27:16 -0400 | [diff] [blame] | 55 | #include <linux/smp.h> |
| 56 | |
Jeff Layton | 5976687 | 2013-02-04 12:50:00 -0500 | [diff] [blame] | 57 | #include <linux/sunrpc/addr.h> |
Chuck Lever | bd2abef | 2018-05-07 15:27:16 -0400 | [diff] [blame] | 58 | #include <linux/sunrpc/svc_rdma.h> |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 59 | |
| 60 | #include "xprt_rdma.h" |
Chuck Lever | b6e717cb | 2018-05-07 15:27:05 -0400 | [diff] [blame] | 61 | #include <trace/events/rpcrdma.h> |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 62 | |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 63 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 64 | # define RPCDBG_FACILITY RPCDBG_TRANS |
| 65 | #endif |
| 66 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 67 | /* |
| 68 | * tunables |
| 69 | */ |
| 70 | |
Zou Wei | 5bffb00 | 2020-04-23 15:10:02 +0800 | [diff] [blame] | 71 | static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE; |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 72 | unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE; |
Chuck Lever | 94087e9 | 2019-04-24 09:40:20 -0400 | [diff] [blame] | 73 | unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE; |
Chuck Lever | ce5b371 | 2017-12-14 20:57:47 -0500 | [diff] [blame] | 74 | unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRWR; |
Chuck Lever | fff0959 | 2017-04-11 13:22:54 -0400 | [diff] [blame] | 75 | int xprt_rdma_pad_optimize; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 76 | |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 77 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 78 | |
| 79 | static unsigned int min_slot_table_size = RPCRDMA_MIN_SLOT_TABLE; |
| 80 | static unsigned int max_slot_table_size = RPCRDMA_MAX_SLOT_TABLE; |
Chuck Lever | 29c5542 | 2016-05-02 14:40:48 -0400 | [diff] [blame] | 81 | static unsigned int min_inline_size = RPCRDMA_MIN_INLINE; |
| 82 | static unsigned int max_inline_size = RPCRDMA_MAX_INLINE; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 83 | static unsigned int max_padding = PAGE_SIZE; |
| 84 | static unsigned int min_memreg = RPCRDMA_BOUNCEBUFFERS; |
| 85 | static unsigned int max_memreg = RPCRDMA_LAST - 1; |
Chuck Lever | 1049270 | 2017-12-14 20:56:42 -0500 | [diff] [blame] | 86 | static unsigned int dummy; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 87 | |
| 88 | static struct ctl_table_header *sunrpc_table_header; |
| 89 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 90 | static struct ctl_table xr_tunables_table[] = { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 91 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 92 | .procname = "rdma_slot_table_entries", |
| 93 | .data = &xprt_rdma_slot_table_entries, |
| 94 | .maxlen = sizeof(unsigned int), |
| 95 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 96 | .proc_handler = proc_dointvec_minmax, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 97 | .extra1 = &min_slot_table_size, |
| 98 | .extra2 = &max_slot_table_size |
| 99 | }, |
| 100 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 101 | .procname = "rdma_max_inline_read", |
| 102 | .data = &xprt_rdma_max_inline_read, |
| 103 | .maxlen = sizeof(unsigned int), |
| 104 | .mode = 0644, |
Chuck Lever | 44829d0 | 2016-09-15 10:57:32 -0400 | [diff] [blame] | 105 | .proc_handler = proc_dointvec_minmax, |
Chuck Lever | 29c5542 | 2016-05-02 14:40:48 -0400 | [diff] [blame] | 106 | .extra1 = &min_inline_size, |
| 107 | .extra2 = &max_inline_size, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 108 | }, |
| 109 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 110 | .procname = "rdma_max_inline_write", |
| 111 | .data = &xprt_rdma_max_inline_write, |
| 112 | .maxlen = sizeof(unsigned int), |
| 113 | .mode = 0644, |
Chuck Lever | 44829d0 | 2016-09-15 10:57:32 -0400 | [diff] [blame] | 114 | .proc_handler = proc_dointvec_minmax, |
Chuck Lever | 29c5542 | 2016-05-02 14:40:48 -0400 | [diff] [blame] | 115 | .extra1 = &min_inline_size, |
| 116 | .extra2 = &max_inline_size, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 117 | }, |
| 118 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 119 | .procname = "rdma_inline_write_padding", |
Chuck Lever | 1049270 | 2017-12-14 20:56:42 -0500 | [diff] [blame] | 120 | .data = &dummy, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 121 | .maxlen = sizeof(unsigned int), |
| 122 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 123 | .proc_handler = proc_dointvec_minmax, |
Matteo Croce | eec4844 | 2019-07-18 15:58:50 -0700 | [diff] [blame] | 124 | .extra1 = SYSCTL_ZERO, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 125 | .extra2 = &max_padding, |
| 126 | }, |
| 127 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 128 | .procname = "rdma_memreg_strategy", |
| 129 | .data = &xprt_rdma_memreg_strategy, |
| 130 | .maxlen = sizeof(unsigned int), |
| 131 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 132 | .proc_handler = proc_dointvec_minmax, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 133 | .extra1 = &min_memreg, |
| 134 | .extra2 = &max_memreg, |
| 135 | }, |
| 136 | { |
Tom Talpey | 9191ca3 | 2008-10-09 15:01:11 -0400 | [diff] [blame] | 137 | .procname = "rdma_pad_optimize", |
| 138 | .data = &xprt_rdma_pad_optimize, |
| 139 | .maxlen = sizeof(unsigned int), |
| 140 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 141 | .proc_handler = proc_dointvec, |
Tom Talpey | 9191ca3 | 2008-10-09 15:01:11 -0400 | [diff] [blame] | 142 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 143 | { }, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 144 | }; |
| 145 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 146 | static struct ctl_table sunrpc_table[] = { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 147 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 148 | .procname = "sunrpc", |
| 149 | .mode = 0555, |
| 150 | .child = xr_tunables_table |
| 151 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 152 | { }, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 153 | }; |
| 154 | |
| 155 | #endif |
| 156 | |
Chuck Lever | d31ae25 | 2017-08-01 12:00:39 -0400 | [diff] [blame] | 157 | static const struct rpc_xprt_ops xprt_rdma_procs; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 158 | |
| 159 | static void |
Chuck Lever | 0dd39ca | 2015-03-30 14:33:43 -0400 | [diff] [blame] | 160 | xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap) |
| 161 | { |
| 162 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
| 163 | char buf[20]; |
| 164 | |
| 165 | snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr)); |
| 166 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL); |
| 167 | |
| 168 | xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA; |
| 169 | } |
| 170 | |
| 171 | static void |
| 172 | xprt_rdma_format_addresses6(struct rpc_xprt *xprt, struct sockaddr *sap) |
| 173 | { |
| 174 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; |
| 175 | char buf[40]; |
| 176 | |
| 177 | snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr); |
| 178 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL); |
| 179 | |
| 180 | xprt->address_strings[RPC_DISPLAY_NETID] = RPCBIND_NETID_RDMA6; |
| 181 | } |
| 182 | |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 183 | void |
Chuck Lever | 5231eb9 | 2015-08-03 13:02:41 -0400 | [diff] [blame] | 184 | xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 185 | { |
Chuck Lever | 0dd39ca | 2015-03-30 14:33:43 -0400 | [diff] [blame] | 186 | char buf[128]; |
| 187 | |
| 188 | switch (sap->sa_family) { |
| 189 | case AF_INET: |
| 190 | xprt_rdma_format_addresses4(xprt, sap); |
| 191 | break; |
| 192 | case AF_INET6: |
| 193 | xprt_rdma_format_addresses6(xprt, sap); |
| 194 | break; |
| 195 | default: |
| 196 | pr_err("rpcrdma: Unrecognized address family\n"); |
| 197 | return; |
| 198 | } |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 199 | |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 200 | (void)rpc_ntop(sap, buf, sizeof(buf)); |
| 201 | xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 202 | |
Joe Perches | 81160e66 | 2010-03-08 12:15:59 -0800 | [diff] [blame] | 203 | snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap)); |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 204 | xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 205 | |
Joe Perches | 81160e66 | 2010-03-08 12:15:59 -0800 | [diff] [blame] | 206 | snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap)); |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 207 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 208 | |
Chuck Lever | 0dd39ca | 2015-03-30 14:33:43 -0400 | [diff] [blame] | 209 | xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma"; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 210 | } |
| 211 | |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 212 | void |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 213 | xprt_rdma_free_addresses(struct rpc_xprt *xprt) |
| 214 | { |
Chuck Lever | 33e01dc | 2008-01-14 12:32:20 -0500 | [diff] [blame] | 215 | unsigned int i; |
| 216 | |
| 217 | for (i = 0; i < RPC_DISPLAY_MAX; i++) |
| 218 | switch (i) { |
| 219 | case RPC_DISPLAY_PROTO: |
| 220 | case RPC_DISPLAY_NETID: |
| 221 | continue; |
| 222 | default: |
| 223 | kfree(xprt->address_strings[i]); |
| 224 | } |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 225 | } |
| 226 | |
Chuck Lever | 31e62d2 | 2018-10-01 14:26:08 -0400 | [diff] [blame] | 227 | /** |
| 228 | * xprt_rdma_connect_worker - establish connection in the background |
| 229 | * @work: worker thread context |
| 230 | * |
| 231 | * Requester holds the xprt's send lock to prevent activity on this |
| 232 | * transport while a fresh connection is being established. RPC tasks |
| 233 | * sleep on the xprt's pending queue waiting for connect to complete. |
| 234 | */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 235 | static void |
| 236 | xprt_rdma_connect_worker(struct work_struct *work) |
| 237 | { |
Chuck Lever | 5abefb8 | 2015-01-21 11:02:37 -0500 | [diff] [blame] | 238 | struct rpcrdma_xprt *r_xprt = container_of(work, struct rpcrdma_xprt, |
| 239 | rx_connect_worker.work); |
| 240 | struct rpc_xprt *xprt = &r_xprt->rx_xprt; |
Chuck Lever | 31e62d2 | 2018-10-01 14:26:08 -0400 | [diff] [blame] | 241 | int rc; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 242 | |
Chuck Lever | 9144a80 | 2020-02-21 17:00:28 -0500 | [diff] [blame] | 243 | rc = rpcrdma_xprt_connect(r_xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 244 | xprt_clear_connecting(xprt); |
Chuck Lever | 2d97f46 | 2020-06-15 09:20:57 -0400 | [diff] [blame^] | 245 | if (!rc) { |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 246 | xprt->connect_cookie++; |
Chuck Lever | 6cb2868 | 2019-10-23 10:01:52 -0400 | [diff] [blame] | 247 | xprt->stat.connect_count++; |
| 248 | xprt->stat.connect_time += (long)jiffies - |
| 249 | xprt->stat.connect_start; |
| 250 | xprt_set_connected(xprt); |
| 251 | rc = -EAGAIN; |
Chuck Lever | 31e62d2 | 2018-10-01 14:26:08 -0400 | [diff] [blame] | 252 | } |
Chuck Lever | 6cb2868 | 2019-10-23 10:01:52 -0400 | [diff] [blame] | 253 | xprt_wake_pending_tasks(xprt, rc); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 254 | } |
| 255 | |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 256 | /** |
| 257 | * xprt_rdma_inject_disconnect - inject a connection fault |
| 258 | * @xprt: transport context |
| 259 | * |
| 260 | * If @xprt is connected, disconnect it to simulate spurious connection |
| 261 | * loss. |
| 262 | */ |
Chuck Lever | 4a06825 | 2015-05-11 14:02:25 -0400 | [diff] [blame] | 263 | static void |
| 264 | xprt_rdma_inject_disconnect(struct rpc_xprt *xprt) |
| 265 | { |
Chuck Lever | ad09118 | 2018-10-01 14:26:45 -0400 | [diff] [blame] | 266 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
Chuck Lever | 4a06825 | 2015-05-11 14:02:25 -0400 | [diff] [blame] | 267 | |
Chuck Lever | 395069f | 2018-12-19 11:00:00 -0500 | [diff] [blame] | 268 | trace_xprtrdma_op_inject_dsc(r_xprt); |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 269 | rdma_disconnect(r_xprt->rx_ep->re_id); |
Chuck Lever | 4a06825 | 2015-05-11 14:02:25 -0400 | [diff] [blame] | 270 | } |
| 271 | |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 272 | /** |
| 273 | * xprt_rdma_destroy - Full tear down of transport |
| 274 | * @xprt: doomed transport context |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 275 | * |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 276 | * Caller guarantees there will be no more calls to us with |
| 277 | * this @xprt. |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 278 | */ |
| 279 | static void |
| 280 | xprt_rdma_destroy(struct rpc_xprt *xprt) |
| 281 | { |
| 282 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 283 | |
Chuck Lever | 5abefb8 | 2015-01-21 11:02:37 -0500 | [diff] [blame] | 284 | cancel_delayed_work_sync(&r_xprt->rx_connect_worker); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 285 | |
Chuck Lever | 9144a80 | 2020-02-21 17:00:28 -0500 | [diff] [blame] | 286 | rpcrdma_xprt_disconnect(r_xprt); |
Steve Wise | 72c0217 | 2015-09-21 12:24:23 -0500 | [diff] [blame] | 287 | rpcrdma_buffer_destroy(&r_xprt->rx_buf); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 288 | |
| 289 | xprt_rdma_free_addresses(xprt); |
Pavel Emelyanov | e204e62 | 2010-09-29 16:03:13 +0400 | [diff] [blame] | 290 | xprt_free(xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 291 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 292 | module_put(THIS_MODULE); |
| 293 | } |
| 294 | |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 295 | /* 60 second timeout, no retries */ |
Trond Myklebust | 2881ae7 | 2007-12-20 16:03:54 -0500 | [diff] [blame] | 296 | static const struct rpc_timeout xprt_rdma_default_timeout = { |
| 297 | .to_initval = 60 * HZ, |
| 298 | .to_maxval = 60 * HZ, |
| 299 | }; |
| 300 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 301 | /** |
| 302 | * xprt_setup_rdma - Set up transport to use RDMA |
| 303 | * |
| 304 | * @args: rpc transport arguments |
| 305 | */ |
| 306 | static struct rpc_xprt * |
| 307 | xprt_setup_rdma(struct xprt_create *args) |
| 308 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 309 | struct rpc_xprt *xprt; |
| 310 | struct rpcrdma_xprt *new_xprt; |
Chuck Lever | 5231eb9 | 2015-08-03 13:02:41 -0400 | [diff] [blame] | 311 | struct sockaddr *sap; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 312 | int rc; |
| 313 | |
Chuck Lever | ddbb347 | 2018-12-19 10:59:39 -0500 | [diff] [blame] | 314 | if (args->addrlen > sizeof(xprt->addr)) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 315 | return ERR_PTR(-EBADF); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 316 | |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 317 | if (!try_module_get(THIS_MODULE)) |
| 318 | return ERR_PTR(-EIO); |
| 319 | |
Chuck Lever | 7581d90 | 2020-01-03 11:56:37 -0500 | [diff] [blame] | 320 | xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), 0, |
| 321 | xprt_rdma_slot_table_entries); |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 322 | if (!xprt) { |
| 323 | module_put(THIS_MODULE); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 324 | return ERR_PTR(-ENOMEM); |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 325 | } |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 326 | |
Trond Myklebust | ba7392b | 2007-12-20 16:03:55 -0500 | [diff] [blame] | 327 | xprt->timeout = &xprt_rdma_default_timeout; |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 328 | xprt->connect_timeout = xprt->timeout->to_initval; |
| 329 | xprt->max_reconnect_timeout = xprt->timeout->to_maxval; |
Chuck Lever | bfaee09 | 2014-05-28 10:34:32 -0400 | [diff] [blame] | 330 | xprt->bind_timeout = RPCRDMA_BIND_TO; |
| 331 | xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO; |
| 332 | xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 333 | |
| 334 | xprt->resvport = 0; /* privileged port not needed */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 335 | xprt->ops = &xprt_rdma_procs; |
| 336 | |
| 337 | /* |
| 338 | * Set up RDMA-specific connect data. |
| 339 | */ |
Chuck Lever | dd229ce | 2017-12-14 20:56:58 -0500 | [diff] [blame] | 340 | sap = args->dstaddr; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 341 | |
| 342 | /* Ensure xprt->addr holds valid server TCP (not RDMA) |
| 343 | * address, for any side protocols which peek at it */ |
| 344 | xprt->prot = IPPROTO_TCP; |
| 345 | xprt->addrlen = args->addrlen; |
Chuck Lever | 5231eb9 | 2015-08-03 13:02:41 -0400 | [diff] [blame] | 346 | memcpy(&xprt->addr, sap, xprt->addrlen); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 347 | |
Chuck Lever | 5231eb9 | 2015-08-03 13:02:41 -0400 | [diff] [blame] | 348 | if (rpc_get_port(sap)) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 349 | xprt_set_bound(xprt); |
Chuck Lever | d461f1f | 2017-12-14 20:56:50 -0500 | [diff] [blame] | 350 | xprt_rdma_format_addresses(xprt, sap); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 351 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 352 | new_xprt = rpcx_to_rdmax(xprt); |
Chuck Lever | ac920d0 | 2015-01-21 11:03:44 -0500 | [diff] [blame] | 353 | rc = rpcrdma_buffer_create(new_xprt); |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 354 | if (rc) { |
| 355 | xprt_rdma_free_addresses(xprt); |
| 356 | xprt_free(xprt); |
| 357 | module_put(THIS_MODULE); |
| 358 | return ERR_PTR(rc); |
| 359 | } |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 360 | |
Chuck Lever | 18d065a | 2020-01-03 11:56:43 -0500 | [diff] [blame] | 361 | INIT_DELAYED_WORK(&new_xprt->rx_connect_worker, |
| 362 | xprt_rdma_connect_worker); |
Chuck Lever | 93aa8e0 | 2020-02-21 17:00:54 -0500 | [diff] [blame] | 363 | |
Chuck Lever | 18d065a | 2020-01-03 11:56:43 -0500 | [diff] [blame] | 364 | xprt->max_payload = RPCRDMA_MAX_DATA_SEGS << PAGE_SHIFT; |
| 365 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 366 | return xprt; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 367 | } |
| 368 | |
Chuck Lever | bebd031 | 2017-04-11 13:23:10 -0400 | [diff] [blame] | 369 | /** |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 370 | * xprt_rdma_close - close a transport connection |
| 371 | * @xprt: transport context |
Chuck Lever | bebd031 | 2017-04-11 13:23:10 -0400 | [diff] [blame] | 372 | * |
Chuck Lever | 395069f | 2018-12-19 11:00:00 -0500 | [diff] [blame] | 373 | * Called during autoclose or device removal. |
| 374 | * |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 375 | * Caller holds @xprt's send lock to prevent activity on this |
| 376 | * transport while the connection is torn down. |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 377 | */ |
Chuck Lever | 0c0829b | 2018-12-19 10:58:40 -0500 | [diff] [blame] | 378 | void xprt_rdma_close(struct rpc_xprt *xprt) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 379 | { |
| 380 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
Chuck Lever | 6d2d0ee | 2018-12-19 10:58:29 -0500 | [diff] [blame] | 381 | |
Chuck Lever | 9144a80 | 2020-02-21 17:00:28 -0500 | [diff] [blame] | 382 | rpcrdma_xprt_disconnect(r_xprt); |
Chuck Lever | ef739b2 | 2018-10-01 14:25:14 -0400 | [diff] [blame] | 383 | |
Chuck Lever | f9e1afe | 2019-08-26 13:12:51 -0400 | [diff] [blame] | 384 | xprt->reestablish_timeout = 0; |
Chuck Lever | 0c0829b | 2018-12-19 10:58:40 -0500 | [diff] [blame] | 385 | ++xprt->connect_cookie; |
| 386 | xprt_disconnect_done(xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 387 | } |
| 388 | |
Chuck Lever | 20035ed | 2017-12-14 20:57:06 -0500 | [diff] [blame] | 389 | /** |
| 390 | * xprt_rdma_set_port - update server port with rpcbind result |
| 391 | * @xprt: controlling RPC transport |
| 392 | * @port: new port value |
| 393 | * |
| 394 | * Transport connect status is unchanged. |
| 395 | */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 396 | static void |
| 397 | xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port) |
| 398 | { |
Chuck Lever | 20035ed | 2017-12-14 20:57:06 -0500 | [diff] [blame] | 399 | struct sockaddr *sap = (struct sockaddr *)&xprt->addr; |
| 400 | char buf[8]; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 401 | |
Chuck Lever | 20035ed | 2017-12-14 20:57:06 -0500 | [diff] [blame] | 402 | rpc_set_port(sap, port); |
| 403 | |
| 404 | kfree(xprt->address_strings[RPC_DISPLAY_PORT]); |
| 405 | snprintf(buf, sizeof(buf), "%u", port); |
| 406 | xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL); |
| 407 | |
| 408 | kfree(xprt->address_strings[RPC_DISPLAY_HEX_PORT]); |
| 409 | snprintf(buf, sizeof(buf), "%4hx", port); |
| 410 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL); |
Chuck Lever | a52c23b | 2019-10-23 10:02:14 -0400 | [diff] [blame] | 411 | |
| 412 | trace_xprtrdma_op_setport(container_of(xprt, struct rpcrdma_xprt, |
| 413 | rx_xprt)); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 414 | } |
| 415 | |
Chuck Lever | 3384979 | 2017-04-11 13:22:46 -0400 | [diff] [blame] | 416 | /** |
| 417 | * xprt_rdma_timer - invoked when an RPC times out |
| 418 | * @xprt: controlling RPC transport |
| 419 | * @task: RPC task that timed out |
| 420 | * |
| 421 | * Invoked when the transport is still connected, but an RPC |
| 422 | * retransmit timeout occurs. |
| 423 | * |
| 424 | * Since RDMA connections don't have a keep-alive, forcibly |
| 425 | * disconnect and retry to connect. This drives full |
| 426 | * detection of the network path, and retransmissions of |
| 427 | * all pending RPCs. |
| 428 | */ |
| 429 | static void |
| 430 | xprt_rdma_timer(struct rpc_xprt *xprt, struct rpc_task *task) |
| 431 | { |
Chuck Lever | 3384979 | 2017-04-11 13:22:46 -0400 | [diff] [blame] | 432 | xprt_force_disconnect(xprt); |
| 433 | } |
| 434 | |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 435 | /** |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 436 | * xprt_rdma_set_connect_timeout - set timeouts for establishing a connection |
| 437 | * @xprt: controlling transport instance |
| 438 | * @connect_timeout: reconnect timeout after client disconnects |
| 439 | * @reconnect_timeout: reconnect timeout after server disconnects |
| 440 | * |
| 441 | */ |
Chuck Lever | 2a7f77c7 | 2019-08-19 18:49:30 -0400 | [diff] [blame] | 442 | static void xprt_rdma_set_connect_timeout(struct rpc_xprt *xprt, |
| 443 | unsigned long connect_timeout, |
| 444 | unsigned long reconnect_timeout) |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 445 | { |
| 446 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
| 447 | |
| 448 | trace_xprtrdma_op_set_cto(r_xprt, connect_timeout, reconnect_timeout); |
| 449 | |
| 450 | spin_lock(&xprt->transport_lock); |
| 451 | |
| 452 | if (connect_timeout < xprt->connect_timeout) { |
| 453 | struct rpc_timeout to; |
| 454 | unsigned long initval; |
| 455 | |
| 456 | to = *xprt->timeout; |
| 457 | initval = connect_timeout; |
| 458 | if (initval < RPCRDMA_INIT_REEST_TO << 1) |
| 459 | initval = RPCRDMA_INIT_REEST_TO << 1; |
| 460 | to.to_initval = initval; |
| 461 | to.to_maxval = initval; |
| 462 | r_xprt->rx_timeout = to; |
| 463 | xprt->timeout = &r_xprt->rx_timeout; |
| 464 | xprt->connect_timeout = connect_timeout; |
| 465 | } |
| 466 | |
| 467 | if (reconnect_timeout < xprt->max_reconnect_timeout) |
| 468 | xprt->max_reconnect_timeout = reconnect_timeout; |
| 469 | |
| 470 | spin_unlock(&xprt->transport_lock); |
| 471 | } |
| 472 | |
| 473 | /** |
| 474 | * xprt_rdma_connect - schedule an attempt to reconnect |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 475 | * @xprt: transport state |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 476 | * @task: RPC scheduler context (unused) |
Chuck Lever | f26c32f | 2018-10-01 14:26:40 -0400 | [diff] [blame] | 477 | * |
| 478 | */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 479 | static void |
Trond Myklebust | 1b09209 | 2013-01-08 09:26:49 -0500 | [diff] [blame] | 480 | xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 481 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 482 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 483 | struct rpcrdma_ep *ep = r_xprt->rx_ep; |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 484 | unsigned long delay; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 485 | |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 486 | delay = 0; |
Chuck Lever | e28ce90 | 2020-02-21 17:01:05 -0500 | [diff] [blame] | 487 | if (ep && ep->re_connect_status != 0) { |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 488 | delay = xprt_reconnect_delay(xprt); |
| 489 | xprt_reconnect_backoff(xprt, RPCRDMA_INIT_REEST_TO); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 490 | } |
Chuck Lever | 7b020f1 | 2019-10-23 10:01:58 -0400 | [diff] [blame] | 491 | trace_xprtrdma_op_connect(r_xprt, delay); |
Chuck Lever | 675dd90 | 2019-06-19 10:33:42 -0400 | [diff] [blame] | 492 | queue_delayed_work(xprtiod_workqueue, &r_xprt->rx_connect_worker, |
| 493 | delay); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 494 | } |
| 495 | |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 496 | /** |
| 497 | * xprt_rdma_alloc_slot - allocate an rpc_rqst |
| 498 | * @xprt: controlling RPC transport |
| 499 | * @task: RPC task requesting a fresh rpc_rqst |
| 500 | * |
| 501 | * tk_status values: |
| 502 | * %0 if task->tk_rqstp points to a fresh rpc_rqst |
| 503 | * %-EAGAIN if no rpc_rqst is available; queued on backlog |
| 504 | */ |
| 505 | static void |
| 506 | xprt_rdma_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task) |
| 507 | { |
Chuck Lever | edb41e6 | 2018-05-04 15:35:09 -0400 | [diff] [blame] | 508 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
| 509 | struct rpcrdma_req *req; |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 510 | |
Chuck Lever | edb41e6 | 2018-05-04 15:35:09 -0400 | [diff] [blame] | 511 | req = rpcrdma_buffer_get(&r_xprt->rx_buf); |
| 512 | if (!req) |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 513 | goto out_sleep; |
Chuck Lever | edb41e6 | 2018-05-04 15:35:09 -0400 | [diff] [blame] | 514 | task->tk_rqstp = &req->rl_slot; |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 515 | task->tk_status = 0; |
| 516 | return; |
| 517 | |
| 518 | out_sleep: |
Chuck Lever | 3957905 | 2019-08-19 18:43:17 -0400 | [diff] [blame] | 519 | set_bit(XPRT_CONGESTED, &xprt->state); |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 520 | rpc_sleep_on(&xprt->backlog, task, NULL); |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 521 | task->tk_status = -EAGAIN; |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * xprt_rdma_free_slot - release an rpc_rqst |
| 526 | * @xprt: controlling RPC transport |
| 527 | * @rqst: rpc_rqst to release |
| 528 | * |
| 529 | */ |
| 530 | static void |
| 531 | xprt_rdma_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *rqst) |
| 532 | { |
Chuck Lever | 5828ceb | 2019-06-19 10:33:36 -0400 | [diff] [blame] | 533 | struct rpcrdma_xprt *r_xprt = |
| 534 | container_of(xprt, struct rpcrdma_xprt, rx_xprt); |
| 535 | |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 536 | memset(rqst, 0, sizeof(*rqst)); |
Chuck Lever | 5828ceb | 2019-06-19 10:33:36 -0400 | [diff] [blame] | 537 | rpcrdma_buffer_put(&r_xprt->rx_buf, rpcr_to_rdmar(rqst)); |
Chuck Lever | 3957905 | 2019-08-19 18:43:17 -0400 | [diff] [blame] | 538 | if (unlikely(!rpc_wake_up_next(&xprt->backlog))) |
| 539 | clear_bit(XPRT_CONGESTED, &xprt->state); |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 540 | } |
| 541 | |
Chuck Lever | 0f665ce | 2019-04-24 09:39:27 -0400 | [diff] [blame] | 542 | static bool rpcrdma_check_regbuf(struct rpcrdma_xprt *r_xprt, |
| 543 | struct rpcrdma_regbuf *rb, size_t size, |
| 544 | gfp_t flags) |
Chuck Lever | 9c40c49 | 2016-09-15 10:55:53 -0400 | [diff] [blame] | 545 | { |
Chuck Lever | 0f665ce | 2019-04-24 09:39:27 -0400 | [diff] [blame] | 546 | if (unlikely(rdmab_length(rb) < size)) { |
| 547 | if (!rpcrdma_regbuf_realloc(rb, size, flags)) |
| 548 | return false; |
| 549 | r_xprt->rx_stats.hardway_register_count += size; |
| 550 | } |
Chuck Lever | 9c40c49 | 2016-09-15 10:55:53 -0400 | [diff] [blame] | 551 | return true; |
| 552 | } |
| 553 | |
Chuck Lever | 5fe6eaa | 2016-09-15 10:55:20 -0400 | [diff] [blame] | 554 | /** |
| 555 | * xprt_rdma_allocate - allocate transport resources for an RPC |
| 556 | * @task: RPC task |
| 557 | * |
| 558 | * Return values: |
| 559 | * 0: Success; rq_buffer points to RPC buffer to use |
| 560 | * ENOMEM: Out of memory, call again later |
| 561 | * EIO: A permanent error occurred, do not retry |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 562 | */ |
Chuck Lever | 5fe6eaa | 2016-09-15 10:55:20 -0400 | [diff] [blame] | 563 | static int |
| 564 | xprt_rdma_allocate(struct rpc_task *task) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 565 | { |
Chuck Lever | 5fe6eaa | 2016-09-15 10:55:20 -0400 | [diff] [blame] | 566 | struct rpc_rqst *rqst = task->tk_rqstp; |
Chuck Lever | 5fe6eaa | 2016-09-15 10:55:20 -0400 | [diff] [blame] | 567 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt); |
Chuck Lever | edb41e6 | 2018-05-04 15:35:09 -0400 | [diff] [blame] | 568 | struct rpcrdma_req *req = rpcr_to_rdmar(rqst); |
Chuck Lever | a0a1d50 | 2015-01-26 17:11:47 -0500 | [diff] [blame] | 569 | gfp_t flags; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 570 | |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 571 | flags = RPCRDMA_DEF_GFP; |
Chuck Lever | a0a1d50 | 2015-01-26 17:11:47 -0500 | [diff] [blame] | 572 | if (RPC_IS_SWAPPER(task)) |
| 573 | flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN; |
| 574 | |
Chuck Lever | 0f665ce | 2019-04-24 09:39:27 -0400 | [diff] [blame] | 575 | if (!rpcrdma_check_regbuf(r_xprt, req->rl_sendbuf, rqst->rq_callsize, |
| 576 | flags)) |
Chuck Lever | 9c40c49 | 2016-09-15 10:55:53 -0400 | [diff] [blame] | 577 | goto out_fail; |
Chuck Lever | 0f665ce | 2019-04-24 09:39:27 -0400 | [diff] [blame] | 578 | if (!rpcrdma_check_regbuf(r_xprt, req->rl_recvbuf, rqst->rq_rcvsize, |
| 579 | flags)) |
Chuck Lever | 9c40c49 | 2016-09-15 10:55:53 -0400 | [diff] [blame] | 580 | goto out_fail; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 581 | |
Chuck Lever | 8cec3db | 2019-04-24 09:39:16 -0400 | [diff] [blame] | 582 | rqst->rq_buffer = rdmab_data(req->rl_sendbuf); |
| 583 | rqst->rq_rbuffer = rdmab_data(req->rl_recvbuf); |
Chuck Lever | 395069f | 2018-12-19 11:00:00 -0500 | [diff] [blame] | 584 | trace_xprtrdma_op_allocate(task, req); |
Chuck Lever | 5fe6eaa | 2016-09-15 10:55:20 -0400 | [diff] [blame] | 585 | return 0; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 586 | |
Chuck Lever | 0ca77dc | 2015-01-21 11:04:08 -0500 | [diff] [blame] | 587 | out_fail: |
Chuck Lever | 395069f | 2018-12-19 11:00:00 -0500 | [diff] [blame] | 588 | trace_xprtrdma_op_allocate(task, NULL); |
Chuck Lever | 5fe6eaa | 2016-09-15 10:55:20 -0400 | [diff] [blame] | 589 | return -ENOMEM; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 590 | } |
| 591 | |
Chuck Lever | 3435c74 | 2016-09-15 10:55:29 -0400 | [diff] [blame] | 592 | /** |
| 593 | * xprt_rdma_free - release resources allocated by xprt_rdma_allocate |
| 594 | * @task: RPC task |
| 595 | * |
| 596 | * Caller guarantees rqst->rq_buffer is non-NULL. |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 597 | */ |
| 598 | static void |
Chuck Lever | 3435c74 | 2016-09-15 10:55:29 -0400 | [diff] [blame] | 599 | xprt_rdma_free(struct rpc_task *task) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 600 | { |
Chuck Lever | 3435c74 | 2016-09-15 10:55:29 -0400 | [diff] [blame] | 601 | struct rpc_rqst *rqst = task->tk_rqstp; |
| 602 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt); |
| 603 | struct rpcrdma_req *req = rpcr_to_rdmar(rqst); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 604 | |
Chuck Lever | 395069f | 2018-12-19 11:00:00 -0500 | [diff] [blame] | 605 | trace_xprtrdma_op_free(task, req); |
Chuck Lever | 0ab1152 | 2019-06-19 10:33:15 -0400 | [diff] [blame] | 606 | |
| 607 | if (!list_empty(&req->rl_registered)) |
| 608 | frwr_unmap_sync(r_xprt, req); |
| 609 | |
| 610 | /* XXX: If the RPC is completing because of a signal and |
| 611 | * not because a reply was received, we ought to ensure |
| 612 | * that the Send completion has fired, so that memory |
| 613 | * involved with the Send is not still visible to the NIC. |
| 614 | */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 615 | } |
| 616 | |
Chuck Lever | 7a89f9c | 2016-06-29 13:53:43 -0400 | [diff] [blame] | 617 | /** |
| 618 | * xprt_rdma_send_request - marshal and send an RPC request |
Trond Myklebust | adfa714 | 2018-09-03 23:58:59 -0400 | [diff] [blame] | 619 | * @rqst: RPC message in rq_snd_buf |
Chuck Lever | 7a89f9c | 2016-06-29 13:53:43 -0400 | [diff] [blame] | 620 | * |
Chuck Lever | bebd031 | 2017-04-11 13:23:10 -0400 | [diff] [blame] | 621 | * Caller holds the transport's write lock. |
| 622 | * |
Chuck Lever | cf73daf | 2017-12-14 20:57:31 -0500 | [diff] [blame] | 623 | * Returns: |
| 624 | * %0 if the RPC message has been sent |
| 625 | * %-ENOTCONN if the caller should reconnect and call again |
Chuck Lever | 9e679d5 | 2018-02-28 15:30:44 -0500 | [diff] [blame] | 626 | * %-EAGAIN if the caller should call again |
| 627 | * %-ENOBUFS if the caller should call again after a delay |
Chuck Lever | 6946f82 | 2018-12-19 10:58:45 -0500 | [diff] [blame] | 628 | * %-EMSGSIZE if encoding ran out of buffer space. The request |
| 629 | * was not sent. Do not try to send this message again. |
| 630 | * %-EIO if an I/O error occurred. The request was not sent. |
| 631 | * Do not try to send this message again. |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 632 | */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 633 | static int |
Trond Myklebust | adfa714 | 2018-09-03 23:58:59 -0400 | [diff] [blame] | 634 | xprt_rdma_send_request(struct rpc_rqst *rqst) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 635 | { |
Trond Myklebust | a4f0835 | 2013-01-08 09:10:21 -0500 | [diff] [blame] | 636 | struct rpc_xprt *xprt = rqst->rq_xprt; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 637 | struct rpcrdma_req *req = rpcr_to_rdmar(rqst); |
| 638 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
Chuck Lever | 6ab5994 | 2014-07-29 17:23:43 -0400 | [diff] [blame] | 639 | int rc = 0; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 640 | |
Chuck Lever | cf73daf | 2017-12-14 20:57:31 -0500 | [diff] [blame] | 641 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
| 642 | if (unlikely(!rqst->rq_buffer)) |
| 643 | return xprt_rdma_bc_send_reply(rqst); |
| 644 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
| 645 | |
Chuck Lever | bebd031 | 2017-04-11 13:23:10 -0400 | [diff] [blame] | 646 | if (!xprt_connected(xprt)) |
Chuck Lever | 0c0829b | 2018-12-19 10:58:40 -0500 | [diff] [blame] | 647 | return -ENOTCONN; |
Chuck Lever | bebd031 | 2017-04-11 13:23:10 -0400 | [diff] [blame] | 648 | |
Trond Myklebust | 75891f5 | 2018-09-03 17:37:36 -0400 | [diff] [blame] | 649 | if (!xprt_request_get_cong(xprt, rqst)) |
| 650 | return -EBADSLT; |
| 651 | |
Chuck Lever | 09e6064 | 2017-08-10 12:47:12 -0400 | [diff] [blame] | 652 | rc = rpcrdma_marshal_req(r_xprt, rqst); |
Chuck Lever | 6ab5994 | 2014-07-29 17:23:43 -0400 | [diff] [blame] | 653 | if (rc < 0) |
| 654 | goto failed_marshal; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 655 | |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 656 | /* Must suppress retransmit to maintain credits */ |
Chuck Lever | 8a14793 | 2018-02-28 15:30:38 -0500 | [diff] [blame] | 657 | if (rqst->rq_connect_cookie == xprt->connect_cookie) |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 658 | goto drop_connection; |
Chuck Lever | 7821575 | 2018-03-05 15:13:07 -0500 | [diff] [blame] | 659 | rqst->rq_xtime = ktime_get(); |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 660 | |
Chuck Lever | 97d0de8 | 2020-02-21 17:00:23 -0500 | [diff] [blame] | 661 | if (rpcrdma_post_sends(r_xprt, req)) |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 662 | goto drop_connection; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 663 | |
Trond Myklebust | d60dbb2 | 2010-05-13 12:51:49 -0400 | [diff] [blame] | 664 | rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len; |
Chuck Lever | fb14ae8 | 2018-02-28 15:30:54 -0500 | [diff] [blame] | 665 | |
| 666 | /* An RPC with no reply will throw off credit accounting, |
| 667 | * so drop the connection to reset the credit grant. |
| 668 | */ |
Trond Myklebust | 50f484e | 2018-08-30 13:27:29 -0400 | [diff] [blame] | 669 | if (!rpc_reply_expected(rqst->rq_task)) |
Chuck Lever | fb14ae8 | 2018-02-28 15:30:54 -0500 | [diff] [blame] | 670 | goto drop_connection; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 671 | return 0; |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 672 | |
Chuck Lever | c93c622 | 2014-05-28 10:35:14 -0400 | [diff] [blame] | 673 | failed_marshal: |
Chuck Lever | 7a89f9c | 2016-06-29 13:53:43 -0400 | [diff] [blame] | 674 | if (rc != -ENOTCONN) |
| 675 | return rc; |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 676 | drop_connection: |
Chuck Lever | 0c0829b | 2018-12-19 10:58:40 -0500 | [diff] [blame] | 677 | xprt_rdma_close(xprt); |
| 678 | return -ENOTCONN; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 679 | } |
| 680 | |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 681 | void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 682 | { |
| 683 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
| 684 | long idle_time = 0; |
| 685 | |
| 686 | if (xprt_connected(xprt)) |
| 687 | idle_time = (long)(jiffies - xprt->last_used) / HZ; |
| 688 | |
Chuck Lever | 763f7e4 | 2015-08-03 13:04:36 -0400 | [diff] [blame] | 689 | seq_puts(seq, "\txprt:\trdma "); |
| 690 | seq_printf(seq, "%u %lu %lu %lu %ld %lu %lu %lu %llu %llu ", |
| 691 | 0, /* need a local port? */ |
| 692 | xprt->stat.bind_count, |
| 693 | xprt->stat.connect_count, |
Chuck Lever | 8440a88 | 2018-10-01 14:25:41 -0400 | [diff] [blame] | 694 | xprt->stat.connect_time / HZ, |
Chuck Lever | 763f7e4 | 2015-08-03 13:04:36 -0400 | [diff] [blame] | 695 | idle_time, |
| 696 | xprt->stat.sends, |
| 697 | xprt->stat.recvs, |
| 698 | xprt->stat.bad_xids, |
| 699 | xprt->stat.req_u, |
| 700 | xprt->stat.bklog_u); |
Chuck Lever | 505bbe6 | 2016-06-29 13:52:54 -0400 | [diff] [blame] | 701 | seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %lu %lu %lu %lu ", |
Chuck Lever | 763f7e4 | 2015-08-03 13:04:36 -0400 | [diff] [blame] | 702 | r_xprt->rx_stats.read_chunk_count, |
| 703 | r_xprt->rx_stats.write_chunk_count, |
| 704 | r_xprt->rx_stats.reply_chunk_count, |
| 705 | r_xprt->rx_stats.total_rdma_request, |
| 706 | r_xprt->rx_stats.total_rdma_reply, |
| 707 | r_xprt->rx_stats.pullup_copy_count, |
| 708 | r_xprt->rx_stats.fixup_copy_count, |
| 709 | r_xprt->rx_stats.hardway_register_count, |
| 710 | r_xprt->rx_stats.failed_marshal_count, |
Chuck Lever | 860477d | 2015-08-03 13:04:45 -0400 | [diff] [blame] | 711 | r_xprt->rx_stats.bad_reply_count, |
| 712 | r_xprt->rx_stats.nomsg_call_count); |
Chuck Lever | 01bb35c | 2017-10-20 10:48:36 -0400 | [diff] [blame] | 713 | seq_printf(seq, "%lu %lu %lu %lu %lu %lu\n", |
Chuck Lever | 61da886 | 2018-10-01 14:25:25 -0400 | [diff] [blame] | 714 | r_xprt->rx_stats.mrs_recycled, |
Chuck Lever | e2ac236 | 2016-06-29 13:54:00 -0400 | [diff] [blame] | 715 | r_xprt->rx_stats.mrs_orphaned, |
Chuck Lever | c8b920b | 2016-09-15 10:57:16 -0400 | [diff] [blame] | 716 | r_xprt->rx_stats.mrs_allocated, |
Chuck Lever | ae72950 | 2017-10-20 10:48:12 -0400 | [diff] [blame] | 717 | r_xprt->rx_stats.local_inv_needed, |
Chuck Lever | 01bb35c | 2017-10-20 10:48:36 -0400 | [diff] [blame] | 718 | r_xprt->rx_stats.empty_sendctx_q, |
| 719 | r_xprt->rx_stats.reply_waits_for_send); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 720 | } |
| 721 | |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 722 | static int |
| 723 | xprt_rdma_enable_swap(struct rpc_xprt *xprt) |
| 724 | { |
Chuck Lever | a045178 | 2015-10-24 17:26:29 -0400 | [diff] [blame] | 725 | return 0; |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 726 | } |
| 727 | |
| 728 | static void |
| 729 | xprt_rdma_disable_swap(struct rpc_xprt *xprt) |
| 730 | { |
| 731 | } |
| 732 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 733 | /* |
| 734 | * Plumbing for rpc transport switch and kernel module |
| 735 | */ |
| 736 | |
Chuck Lever | d31ae25 | 2017-08-01 12:00:39 -0400 | [diff] [blame] | 737 | static const struct rpc_xprt_ops xprt_rdma_procs = { |
Chuck Lever | e7ce710 | 2014-05-28 10:34:57 -0400 | [diff] [blame] | 738 | .reserve_xprt = xprt_reserve_xprt_cong, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 739 | .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */ |
Chuck Lever | 48be539 | 2018-05-04 15:35:04 -0400 | [diff] [blame] | 740 | .alloc_slot = xprt_rdma_alloc_slot, |
| 741 | .free_slot = xprt_rdma_free_slot, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 742 | .release_request = xprt_release_rqst_cong, /* ditto */ |
Trond Myklebust | 8ba6a92 | 2019-04-07 13:58:46 -0400 | [diff] [blame] | 743 | .wait_for_reply_request = xprt_wait_for_reply_request_def, /* ditto */ |
Chuck Lever | 3384979 | 2017-04-11 13:22:46 -0400 | [diff] [blame] | 744 | .timer = xprt_rdma_timer, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 745 | .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */ |
| 746 | .set_port = xprt_rdma_set_port, |
| 747 | .connect = xprt_rdma_connect, |
| 748 | .buf_alloc = xprt_rdma_allocate, |
| 749 | .buf_free = xprt_rdma_free, |
| 750 | .send_request = xprt_rdma_send_request, |
| 751 | .close = xprt_rdma_close, |
| 752 | .destroy = xprt_rdma_destroy, |
Chuck Lever | 2a7f77c7 | 2019-08-19 18:49:30 -0400 | [diff] [blame] | 753 | .set_connect_timeout = xprt_rdma_set_connect_timeout, |
Jeff Layton | d67fa4d | 2015-06-03 16:14:29 -0400 | [diff] [blame] | 754 | .print_stats = xprt_rdma_print_stats, |
| 755 | .enable_swap = xprt_rdma_enable_swap, |
| 756 | .disable_swap = xprt_rdma_disable_swap, |
Chuck Lever | f531a5d | 2015-10-24 17:27:43 -0400 | [diff] [blame] | 757 | .inject_disconnect = xprt_rdma_inject_disconnect, |
| 758 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
| 759 | .bc_setup = xprt_rdma_bc_setup, |
Chuck Lever | 6b26cc8 | 2016-05-02 14:40:40 -0400 | [diff] [blame] | 760 | .bc_maxpayload = xprt_rdma_bc_maxpayload, |
Trond Myklebust | 7402a4f | 2019-07-16 13:51:29 -0400 | [diff] [blame] | 761 | .bc_num_slots = xprt_rdma_bc_max_slots, |
Chuck Lever | f531a5d | 2015-10-24 17:27:43 -0400 | [diff] [blame] | 762 | .bc_free_rqst = xprt_rdma_bc_free_rqst, |
| 763 | .bc_destroy = xprt_rdma_bc_destroy, |
| 764 | #endif |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 765 | }; |
| 766 | |
| 767 | static struct xprt_class xprt_rdma = { |
| 768 | .list = LIST_HEAD_INIT(xprt_rdma.list), |
| 769 | .name = "rdma", |
| 770 | .owner = THIS_MODULE, |
| 771 | .ident = XPRT_TRANSPORT_RDMA, |
| 772 | .setup = xprt_setup_rdma, |
| 773 | }; |
| 774 | |
Chuck Lever | ffe1f0d | 2015-06-04 11:21:42 -0400 | [diff] [blame] | 775 | void xprt_rdma_cleanup(void) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 776 | { |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 777 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 778 | if (sunrpc_table_header) { |
| 779 | unregister_sysctl_table(sunrpc_table_header); |
| 780 | sunrpc_table_header = NULL; |
| 781 | } |
| 782 | #endif |
Chuck Lever | 951e721 | 2015-05-26 11:52:25 -0400 | [diff] [blame] | 783 | |
Chuck Lever | ddbb347 | 2018-12-19 10:59:39 -0500 | [diff] [blame] | 784 | xprt_unregister_transport(&xprt_rdma); |
| 785 | xprt_unregister_transport(&xprt_rdma_bc); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 786 | } |
| 787 | |
Chuck Lever | ffe1f0d | 2015-06-04 11:21:42 -0400 | [diff] [blame] | 788 | int xprt_rdma_init(void) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 789 | { |
| 790 | int rc; |
| 791 | |
Chuck Lever | 6d2d0ee | 2018-12-19 10:58:29 -0500 | [diff] [blame] | 792 | rc = xprt_register_transport(&xprt_rdma); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 793 | if (rc) |
| 794 | return rc; |
| 795 | |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 796 | rc = xprt_register_transport(&xprt_rdma_bc); |
| 797 | if (rc) { |
| 798 | xprt_unregister_transport(&xprt_rdma); |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 799 | return rc; |
| 800 | } |
| 801 | |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 802 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 803 | if (!sunrpc_table_header) |
| 804 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
| 805 | #endif |
| 806 | return 0; |
| 807 | } |