\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 1 | /* |
| 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> |
| 51 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 52 | #include <linux/slab.h> |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 53 | #include <linux/seq_file.h> |
Jeff Layton | 5976687 | 2013-02-04 12:50:00 -0500 | [diff] [blame] | 54 | #include <linux/sunrpc/addr.h> |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 55 | |
| 56 | #include "xprt_rdma.h" |
| 57 | |
| 58 | #ifdef RPC_DEBUG |
| 59 | # define RPCDBG_FACILITY RPCDBG_TRANS |
| 60 | #endif |
| 61 | |
| 62 | MODULE_LICENSE("Dual BSD/GPL"); |
| 63 | |
| 64 | MODULE_DESCRIPTION("RPC/RDMA Transport for Linux kernel NFS"); |
| 65 | MODULE_AUTHOR("Network Appliance, Inc."); |
| 66 | |
| 67 | /* |
| 68 | * tunables |
| 69 | */ |
| 70 | |
| 71 | static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE; |
| 72 | static unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE; |
| 73 | static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE; |
| 74 | static unsigned int xprt_rdma_inline_write_padding; |
Tom Talpey | 3197d309 | 2008-10-09 15:00:20 -0400 | [diff] [blame] | 75 | static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR; |
Tom Talpey | 9191ca3 | 2008-10-09 15:01:11 -0400 | [diff] [blame] | 76 | int xprt_rdma_pad_optimize = 0; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 77 | |
| 78 | #ifdef RPC_DEBUG |
| 79 | |
| 80 | static unsigned int min_slot_table_size = RPCRDMA_MIN_SLOT_TABLE; |
| 81 | static unsigned int max_slot_table_size = RPCRDMA_MAX_SLOT_TABLE; |
| 82 | static unsigned int zero; |
| 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; |
| 86 | |
| 87 | static struct ctl_table_header *sunrpc_table_header; |
| 88 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 89 | static struct ctl_table xr_tunables_table[] = { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 90 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 91 | .procname = "rdma_slot_table_entries", |
| 92 | .data = &xprt_rdma_slot_table_entries, |
| 93 | .maxlen = sizeof(unsigned int), |
| 94 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 95 | .proc_handler = proc_dointvec_minmax, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 96 | .extra1 = &min_slot_table_size, |
| 97 | .extra2 = &max_slot_table_size |
| 98 | }, |
| 99 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 100 | .procname = "rdma_max_inline_read", |
| 101 | .data = &xprt_rdma_max_inline_read, |
| 102 | .maxlen = sizeof(unsigned int), |
| 103 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 104 | .proc_handler = proc_dointvec, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 105 | }, |
| 106 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 107 | .procname = "rdma_max_inline_write", |
| 108 | .data = &xprt_rdma_max_inline_write, |
| 109 | .maxlen = sizeof(unsigned int), |
| 110 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 111 | .proc_handler = proc_dointvec, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 112 | }, |
| 113 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 114 | .procname = "rdma_inline_write_padding", |
| 115 | .data = &xprt_rdma_inline_write_padding, |
| 116 | .maxlen = sizeof(unsigned int), |
| 117 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 118 | .proc_handler = proc_dointvec_minmax, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 119 | .extra1 = &zero, |
| 120 | .extra2 = &max_padding, |
| 121 | }, |
| 122 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 123 | .procname = "rdma_memreg_strategy", |
| 124 | .data = &xprt_rdma_memreg_strategy, |
| 125 | .maxlen = sizeof(unsigned int), |
| 126 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 127 | .proc_handler = proc_dointvec_minmax, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 128 | .extra1 = &min_memreg, |
| 129 | .extra2 = &max_memreg, |
| 130 | }, |
| 131 | { |
Tom Talpey | 9191ca3 | 2008-10-09 15:01:11 -0400 | [diff] [blame] | 132 | .procname = "rdma_pad_optimize", |
| 133 | .data = &xprt_rdma_pad_optimize, |
| 134 | .maxlen = sizeof(unsigned int), |
| 135 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 136 | .proc_handler = proc_dointvec, |
Tom Talpey | 9191ca3 | 2008-10-09 15:01:11 -0400 | [diff] [blame] | 137 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 138 | { }, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 139 | }; |
| 140 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 141 | static struct ctl_table sunrpc_table[] = { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 142 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 143 | .procname = "sunrpc", |
| 144 | .mode = 0555, |
| 145 | .child = xr_tunables_table |
| 146 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 147 | { }, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | #endif |
| 151 | |
Chuck Lever | bfaee09 | 2014-05-28 10:34:32 -0400 | [diff] [blame] | 152 | #define RPCRDMA_BIND_TO (60U * HZ) |
| 153 | #define RPCRDMA_INIT_REEST_TO (5U * HZ) |
| 154 | #define RPCRDMA_MAX_REEST_TO (30U * HZ) |
| 155 | #define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ) |
| 156 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 157 | static struct rpc_xprt_ops xprt_rdma_procs; /* forward reference */ |
| 158 | |
| 159 | static void |
| 160 | xprt_rdma_format_addresses(struct rpc_xprt *xprt) |
| 161 | { |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 162 | struct sockaddr *sap = (struct sockaddr *) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 163 | &rpcx_to_rdmad(xprt).addr; |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 164 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
| 165 | char buf[64]; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 166 | |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 167 | (void)rpc_ntop(sap, buf, sizeof(buf)); |
| 168 | xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 169 | |
Joe Perches | 81160e66 | 2010-03-08 12:15:59 -0800 | [diff] [blame] | 170 | snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap)); |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 171 | xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 172 | |
| 173 | xprt->address_strings[RPC_DISPLAY_PROTO] = "rdma"; |
| 174 | |
Joe Perches | 81160e66 | 2010-03-08 12:15:59 -0800 | [diff] [blame] | 175 | snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr)); |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 176 | xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 177 | |
Joe Perches | 81160e66 | 2010-03-08 12:15:59 -0800 | [diff] [blame] | 178 | snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap)); |
Chuck Lever | c877b84 | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 179 | xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 180 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 181 | /* netid */ |
| 182 | xprt->address_strings[RPC_DISPLAY_NETID] = "rdma"; |
| 183 | } |
| 184 | |
| 185 | static void |
| 186 | xprt_rdma_free_addresses(struct rpc_xprt *xprt) |
| 187 | { |
Chuck Lever | 33e01dc | 2008-01-14 12:32:20 -0500 | [diff] [blame] | 188 | unsigned int i; |
| 189 | |
| 190 | for (i = 0; i < RPC_DISPLAY_MAX; i++) |
| 191 | switch (i) { |
| 192 | case RPC_DISPLAY_PROTO: |
| 193 | case RPC_DISPLAY_NETID: |
| 194 | continue; |
| 195 | default: |
| 196 | kfree(xprt->address_strings[i]); |
| 197 | } |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static void |
| 201 | xprt_rdma_connect_worker(struct work_struct *work) |
| 202 | { |
| 203 | struct rpcrdma_xprt *r_xprt = |
| 204 | container_of(work, struct rpcrdma_xprt, rdma_connect.work); |
| 205 | struct rpc_xprt *xprt = &r_xprt->xprt; |
| 206 | int rc = 0; |
| 207 | |
Trond Myklebust | d19751e | 2012-09-11 17:21:25 -0400 | [diff] [blame] | 208 | xprt_clear_connected(xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 209 | |
Trond Myklebust | d19751e | 2012-09-11 17:21:25 -0400 | [diff] [blame] | 210 | dprintk("RPC: %s: %sconnect\n", __func__, |
| 211 | r_xprt->rx_ep.rep_connected != 0 ? "re" : ""); |
| 212 | rc = rpcrdma_ep_connect(&r_xprt->rx_ep, &r_xprt->rx_ia); |
| 213 | if (rc) |
| 214 | xprt_wake_pending_tasks(xprt, rc); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 215 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 216 | dprintk("RPC: %s: exit\n", __func__); |
| 217 | xprt_clear_connecting(xprt); |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * xprt_rdma_destroy |
| 222 | * |
| 223 | * Destroy the xprt. |
| 224 | * Free all memory associated with the object, including its own. |
| 225 | * NOTE: none of the *destroy methods free memory for their top-level |
| 226 | * objects, even though they may have allocated it (they do free |
| 227 | * private memory). It's up to the caller to handle it. In this |
| 228 | * case (RDMA transport), all structure memory is inlined with the |
| 229 | * struct rpcrdma_xprt. |
| 230 | */ |
| 231 | static void |
| 232 | xprt_rdma_destroy(struct rpc_xprt *xprt) |
| 233 | { |
| 234 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 235 | |
| 236 | dprintk("RPC: %s: called\n", __func__); |
| 237 | |
Tejun Heo | a25e758 | 2010-10-15 17:49:27 +0200 | [diff] [blame] | 238 | cancel_delayed_work_sync(&r_xprt->rdma_connect); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 239 | |
| 240 | xprt_clear_connected(xprt); |
| 241 | |
| 242 | rpcrdma_buffer_destroy(&r_xprt->rx_buf); |
Chuck Lever | 7f1d541 | 2014-05-28 10:33:16 -0400 | [diff] [blame] | 243 | rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 244 | rpcrdma_ia_close(&r_xprt->rx_ia); |
| 245 | |
| 246 | xprt_rdma_free_addresses(xprt); |
| 247 | |
Pavel Emelyanov | e204e62 | 2010-09-29 16:03:13 +0400 | [diff] [blame] | 248 | xprt_free(xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 249 | |
| 250 | dprintk("RPC: %s: returning\n", __func__); |
| 251 | |
| 252 | module_put(THIS_MODULE); |
| 253 | } |
| 254 | |
Trond Myklebust | 2881ae7 | 2007-12-20 16:03:54 -0500 | [diff] [blame] | 255 | static const struct rpc_timeout xprt_rdma_default_timeout = { |
| 256 | .to_initval = 60 * HZ, |
| 257 | .to_maxval = 60 * HZ, |
| 258 | }; |
| 259 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 260 | /** |
| 261 | * xprt_setup_rdma - Set up transport to use RDMA |
| 262 | * |
| 263 | * @args: rpc transport arguments |
| 264 | */ |
| 265 | static struct rpc_xprt * |
| 266 | xprt_setup_rdma(struct xprt_create *args) |
| 267 | { |
| 268 | struct rpcrdma_create_data_internal cdata; |
| 269 | struct rpc_xprt *xprt; |
| 270 | struct rpcrdma_xprt *new_xprt; |
| 271 | struct rpcrdma_ep *new_ep; |
| 272 | struct sockaddr_in *sin; |
| 273 | int rc; |
| 274 | |
| 275 | if (args->addrlen > sizeof(xprt->addr)) { |
| 276 | dprintk("RPC: %s: address too large\n", __func__); |
| 277 | return ERR_PTR(-EBADF); |
| 278 | } |
| 279 | |
Pavel Emelyanov | 37aa213 | 2010-09-29 16:05:43 +0400 | [diff] [blame] | 280 | xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), |
Trond Myklebust | d9ba131 | 2011-07-17 18:11:30 -0400 | [diff] [blame] | 281 | xprt_rdma_slot_table_entries, |
Pavel Emelyanov | bd1722d | 2010-09-29 16:02:43 +0400 | [diff] [blame] | 282 | xprt_rdma_slot_table_entries); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 283 | if (xprt == NULL) { |
| 284 | dprintk("RPC: %s: couldn't allocate rpcrdma_xprt\n", |
| 285 | __func__); |
| 286 | return ERR_PTR(-ENOMEM); |
| 287 | } |
| 288 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 289 | /* 60 second timeout, no retries */ |
Trond Myklebust | ba7392b | 2007-12-20 16:03:55 -0500 | [diff] [blame] | 290 | xprt->timeout = &xprt_rdma_default_timeout; |
Chuck Lever | bfaee09 | 2014-05-28 10:34:32 -0400 | [diff] [blame] | 291 | xprt->bind_timeout = RPCRDMA_BIND_TO; |
| 292 | xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO; |
| 293 | xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 294 | |
| 295 | xprt->resvport = 0; /* privileged port not needed */ |
| 296 | xprt->tsh_size = 0; /* RPC-RDMA handles framing */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 297 | xprt->ops = &xprt_rdma_procs; |
| 298 | |
| 299 | /* |
| 300 | * Set up RDMA-specific connect data. |
| 301 | */ |
| 302 | |
| 303 | /* Put server RDMA address in local cdata */ |
| 304 | memcpy(&cdata.addr, args->dstaddr, args->addrlen); |
| 305 | |
| 306 | /* Ensure xprt->addr holds valid server TCP (not RDMA) |
| 307 | * address, for any side protocols which peek at it */ |
| 308 | xprt->prot = IPPROTO_TCP; |
| 309 | xprt->addrlen = args->addrlen; |
| 310 | memcpy(&xprt->addr, &cdata.addr, xprt->addrlen); |
| 311 | |
| 312 | sin = (struct sockaddr_in *)&cdata.addr; |
| 313 | if (ntohs(sin->sin_port) != 0) |
| 314 | xprt_set_bound(xprt); |
| 315 | |
Harvey Harrison | 21454aa | 2008-10-31 00:54:56 -0700 | [diff] [blame] | 316 | dprintk("RPC: %s: %pI4:%u\n", |
| 317 | __func__, &sin->sin_addr.s_addr, ntohs(sin->sin_port)); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 318 | |
| 319 | /* Set max requests */ |
| 320 | cdata.max_requests = xprt->max_reqs; |
| 321 | |
| 322 | /* Set some length limits */ |
| 323 | cdata.rsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA write max */ |
| 324 | cdata.wsize = RPCRDMA_MAX_SEGS * PAGE_SIZE; /* RDMA read max */ |
| 325 | |
| 326 | cdata.inline_wsize = xprt_rdma_max_inline_write; |
| 327 | if (cdata.inline_wsize > cdata.wsize) |
| 328 | cdata.inline_wsize = cdata.wsize; |
| 329 | |
| 330 | cdata.inline_rsize = xprt_rdma_max_inline_read; |
| 331 | if (cdata.inline_rsize > cdata.rsize) |
| 332 | cdata.inline_rsize = cdata.rsize; |
| 333 | |
| 334 | cdata.padding = xprt_rdma_inline_write_padding; |
| 335 | |
| 336 | /* |
| 337 | * Create new transport instance, which includes initialized |
| 338 | * o ia |
| 339 | * o endpoint |
| 340 | * o buffers |
| 341 | */ |
| 342 | |
| 343 | new_xprt = rpcx_to_rdmax(xprt); |
| 344 | |
| 345 | rc = rpcrdma_ia_open(new_xprt, (struct sockaddr *) &cdata.addr, |
| 346 | xprt_rdma_memreg_strategy); |
| 347 | if (rc) |
| 348 | goto out1; |
| 349 | |
| 350 | /* |
| 351 | * initialize and create ep |
| 352 | */ |
| 353 | new_xprt->rx_data = cdata; |
| 354 | new_ep = &new_xprt->rx_ep; |
| 355 | new_ep->rep_remote_addr = cdata.addr; |
| 356 | |
| 357 | rc = rpcrdma_ep_create(&new_xprt->rx_ep, |
| 358 | &new_xprt->rx_ia, &new_xprt->rx_data); |
| 359 | if (rc) |
| 360 | goto out2; |
| 361 | |
| 362 | /* |
| 363 | * Allocate pre-registered send and receive buffers for headers and |
| 364 | * any inline data. Also specify any padding which will be provided |
| 365 | * from a preregistered zero buffer. |
| 366 | */ |
| 367 | rc = rpcrdma_buffer_create(&new_xprt->rx_buf, new_ep, &new_xprt->rx_ia, |
| 368 | &new_xprt->rx_data); |
| 369 | if (rc) |
| 370 | goto out3; |
| 371 | |
| 372 | /* |
| 373 | * Register a callback for connection events. This is necessary because |
| 374 | * connection loss notification is async. We also catch connection loss |
| 375 | * when reaping receives. |
| 376 | */ |
| 377 | INIT_DELAYED_WORK(&new_xprt->rdma_connect, xprt_rdma_connect_worker); |
| 378 | new_ep->rep_func = rpcrdma_conn_func; |
| 379 | new_ep->rep_xprt = xprt; |
| 380 | |
| 381 | xprt_rdma_format_addresses(xprt); |
Chuck Lever | 43e9598 | 2014-07-29 17:23:34 -0400 | [diff] [blame] | 382 | xprt->max_payload = rpcrdma_max_payload(new_xprt); |
| 383 | dprintk("RPC: %s: transport data payload maximum: %zu bytes\n", |
| 384 | __func__, xprt->max_payload); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 385 | |
| 386 | if (!try_module_get(THIS_MODULE)) |
| 387 | goto out4; |
| 388 | |
| 389 | return xprt; |
| 390 | |
| 391 | out4: |
| 392 | xprt_rdma_free_addresses(xprt); |
| 393 | rc = -EINVAL; |
| 394 | out3: |
Chuck Lever | 7f1d541 | 2014-05-28 10:33:16 -0400 | [diff] [blame] | 395 | rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 396 | out2: |
| 397 | rpcrdma_ia_close(&new_xprt->rx_ia); |
| 398 | out1: |
Pavel Emelyanov | e204e62 | 2010-09-29 16:03:13 +0400 | [diff] [blame] | 399 | xprt_free(xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 400 | return ERR_PTR(rc); |
| 401 | } |
| 402 | |
| 403 | /* |
| 404 | * Close a connection, during shutdown or timeout/reconnect |
| 405 | */ |
| 406 | static void |
| 407 | xprt_rdma_close(struct rpc_xprt *xprt) |
| 408 | { |
| 409 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
| 410 | |
| 411 | dprintk("RPC: %s: closing\n", __func__); |
Tom Talpey | 08ca0dc | 2008-10-10 11:32:34 -0400 | [diff] [blame] | 412 | if (r_xprt->rx_ep.rep_connected > 0) |
| 413 | xprt->reestablish_timeout = 0; |
Trond Myklebust | 62da3b2 | 2007-11-06 18:44:20 -0500 | [diff] [blame] | 414 | xprt_disconnect_done(xprt); |
Chuck Lever | 282191c | 2014-07-29 17:25:55 -0400 | [diff] [blame] | 415 | rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | static void |
| 419 | xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port) |
| 420 | { |
| 421 | struct sockaddr_in *sap; |
| 422 | |
| 423 | sap = (struct sockaddr_in *)&xprt->addr; |
| 424 | sap->sin_port = htons(port); |
| 425 | sap = (struct sockaddr_in *)&rpcx_to_rdmad(xprt).addr; |
| 426 | sap->sin_port = htons(port); |
| 427 | dprintk("RPC: %s: %u\n", __func__, port); |
| 428 | } |
| 429 | |
| 430 | static void |
Trond Myklebust | 1b09209 | 2013-01-08 09:26:49 -0500 | [diff] [blame] | 431 | xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task) |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 432 | { |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 433 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
| 434 | |
Trond Myklebust | 0b9e794 | 2010-04-16 16:41:57 -0400 | [diff] [blame] | 435 | if (r_xprt->rx_ep.rep_connected != 0) { |
| 436 | /* Reconnect */ |
| 437 | schedule_delayed_work(&r_xprt->rdma_connect, |
| 438 | xprt->reestablish_timeout); |
| 439 | xprt->reestablish_timeout <<= 1; |
Chuck Lever | bfaee09 | 2014-05-28 10:34:32 -0400 | [diff] [blame] | 440 | if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO) |
| 441 | xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO; |
| 442 | else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO) |
| 443 | xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO; |
Trond Myklebust | 0b9e794 | 2010-04-16 16:41:57 -0400 | [diff] [blame] | 444 | } else { |
| 445 | schedule_delayed_work(&r_xprt->rdma_connect, 0); |
| 446 | if (!RPC_IS_ASYNC(task)) |
Tejun Heo | a25e758 | 2010-10-15 17:49:27 +0200 | [diff] [blame] | 447 | flush_delayed_work(&r_xprt->rdma_connect); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 448 | } |
| 449 | } |
| 450 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 451 | /* |
| 452 | * The RDMA allocate/free functions need the task structure as a place |
| 453 | * to hide the struct rpcrdma_req, which is necessary for the actual send/recv |
| 454 | * sequence. For this reason, the recv buffers are attached to send |
| 455 | * buffers for portions of the RPC. Note that the RPC layer allocates |
| 456 | * both send and receive buffers in the same call. We may register |
| 457 | * the receive buffer portion when using reply chunks. |
| 458 | */ |
| 459 | static void * |
| 460 | xprt_rdma_allocate(struct rpc_task *task, size_t size) |
| 461 | { |
Trond Myklebust | a4f0835 | 2013-01-08 09:10:21 -0500 | [diff] [blame] | 462 | struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 463 | struct rpcrdma_req *req, *nreq; |
| 464 | |
| 465 | req = rpcrdma_buffer_get(&rpcx_to_rdmax(xprt)->rx_buf); |
Chuck Lever | c977dea | 2014-05-28 10:35:06 -0400 | [diff] [blame] | 466 | if (req == NULL) |
| 467 | return NULL; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 468 | |
| 469 | if (size > req->rl_size) { |
| 470 | dprintk("RPC: %s: size %zd too large for buffer[%zd]: " |
| 471 | "prog %d vers %d proc %d\n", |
| 472 | __func__, size, req->rl_size, |
| 473 | task->tk_client->cl_prog, task->tk_client->cl_vers, |
| 474 | task->tk_msg.rpc_proc->p_proc); |
| 475 | /* |
| 476 | * Outgoing length shortage. Our inline write max must have |
| 477 | * been configured to perform direct i/o. |
| 478 | * |
| 479 | * This is therefore a large metadata operation, and the |
| 480 | * allocate call was made on the maximum possible message, |
| 481 | * e.g. containing long filename(s) or symlink data. In |
| 482 | * fact, while these metadata operations *might* carry |
| 483 | * large outgoing payloads, they rarely *do*. However, we |
| 484 | * have to commit to the request here, so reallocate and |
| 485 | * register it now. The data path will never require this |
| 486 | * reallocation. |
| 487 | * |
| 488 | * If the allocation or registration fails, the RPC framework |
| 489 | * will (doggedly) retry. |
| 490 | */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 491 | if (task->tk_flags & RPC_TASK_SWAPPER) |
| 492 | nreq = kmalloc(sizeof *req + size, GFP_ATOMIC); |
| 493 | else |
| 494 | nreq = kmalloc(sizeof *req + size, GFP_NOFS); |
| 495 | if (nreq == NULL) |
| 496 | goto outfail; |
| 497 | |
| 498 | if (rpcrdma_register_internal(&rpcx_to_rdmax(xprt)->rx_ia, |
| 499 | nreq->rl_base, size + sizeof(struct rpcrdma_req) |
| 500 | - offsetof(struct rpcrdma_req, rl_base), |
| 501 | &nreq->rl_handle, &nreq->rl_iov)) { |
| 502 | kfree(nreq); |
| 503 | goto outfail; |
| 504 | } |
| 505 | rpcx_to_rdmax(xprt)->rx_stats.hardway_register_count += size; |
| 506 | nreq->rl_size = size; |
| 507 | nreq->rl_niovs = 0; |
| 508 | nreq->rl_nchunks = 0; |
| 509 | nreq->rl_buffer = (struct rpcrdma_buffer *)req; |
| 510 | nreq->rl_reply = req->rl_reply; |
| 511 | memcpy(nreq->rl_segments, |
| 512 | req->rl_segments, sizeof nreq->rl_segments); |
| 513 | /* flag the swap with an unused field */ |
| 514 | nreq->rl_iov.length = 0; |
| 515 | req->rl_reply = NULL; |
| 516 | req = nreq; |
| 517 | } |
| 518 | dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req); |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 519 | req->rl_connect_cookie = 0; /* our reserved value */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 520 | return req->rl_xdr_buf; |
| 521 | |
| 522 | outfail: |
| 523 | rpcrdma_buffer_put(req); |
| 524 | rpcx_to_rdmax(xprt)->rx_stats.failed_marshal_count++; |
| 525 | return NULL; |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * This function returns all RDMA resources to the pool. |
| 530 | */ |
| 531 | static void |
| 532 | xprt_rdma_free(void *buffer) |
| 533 | { |
| 534 | struct rpcrdma_req *req; |
| 535 | struct rpcrdma_xprt *r_xprt; |
| 536 | struct rpcrdma_rep *rep; |
| 537 | int i; |
| 538 | |
| 539 | if (buffer == NULL) |
| 540 | return; |
| 541 | |
| 542 | req = container_of(buffer, struct rpcrdma_req, rl_xdr_buf[0]); |
Tom Talpey | ee1a2c5 | 2008-02-27 15:04:26 -0500 | [diff] [blame] | 543 | if (req->rl_iov.length == 0) { /* see allocate above */ |
| 544 | r_xprt = container_of(((struct rpcrdma_req *) req->rl_buffer)->rl_buffer, |
| 545 | struct rpcrdma_xprt, rx_buf); |
| 546 | } else |
| 547 | r_xprt = container_of(req->rl_buffer, struct rpcrdma_xprt, rx_buf); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 548 | rep = req->rl_reply; |
| 549 | |
| 550 | dprintk("RPC: %s: called on 0x%p%s\n", |
| 551 | __func__, rep, (rep && rep->rr_func) ? " (with waiter)" : ""); |
| 552 | |
| 553 | /* |
Chuck Lever | b45ccfd | 2014-05-28 10:32:34 -0400 | [diff] [blame] | 554 | * Finish the deregistration. The process is considered |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 555 | * complete when the rr_func vector becomes NULL - this |
| 556 | * was put in place during rpcrdma_reply_handler() - the wait |
| 557 | * call below will not block if the dereg is "done". If |
| 558 | * interrupted, our framework will clean up. |
| 559 | */ |
| 560 | for (i = 0; req->rl_nchunks;) { |
| 561 | --req->rl_nchunks; |
| 562 | i += rpcrdma_deregister_external( |
Chuck Lever | 13c9ff8 | 2014-05-28 10:33:08 -0400 | [diff] [blame] | 563 | &req->rl_segments[i], r_xprt); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 564 | } |
| 565 | |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 566 | if (req->rl_iov.length == 0) { /* see allocate above */ |
| 567 | struct rpcrdma_req *oreq = (struct rpcrdma_req *)req->rl_buffer; |
| 568 | oreq->rl_reply = req->rl_reply; |
| 569 | (void) rpcrdma_deregister_internal(&r_xprt->rx_ia, |
| 570 | req->rl_handle, |
| 571 | &req->rl_iov); |
| 572 | kfree(req); |
| 573 | req = oreq; |
| 574 | } |
| 575 | |
| 576 | /* Put back request+reply buffers */ |
| 577 | rpcrdma_buffer_put(req); |
| 578 | } |
| 579 | |
| 580 | /* |
| 581 | * send_request invokes the meat of RPC RDMA. It must do the following: |
| 582 | * 1. Marshal the RPC request into an RPC RDMA request, which means |
| 583 | * putting a header in front of data, and creating IOVs for RDMA |
| 584 | * from those in the request. |
| 585 | * 2. In marshaling, detect opportunities for RDMA, and use them. |
| 586 | * 3. Post a recv message to set up asynch completion, then send |
| 587 | * the request (rpcrdma_ep_post). |
| 588 | * 4. No partial sends are possible in the RPC-RDMA protocol (as in UDP). |
| 589 | */ |
| 590 | |
| 591 | static int |
| 592 | xprt_rdma_send_request(struct rpc_task *task) |
| 593 | { |
| 594 | struct rpc_rqst *rqst = task->tk_rqstp; |
Trond Myklebust | a4f0835 | 2013-01-08 09:10:21 -0500 | [diff] [blame] | 595 | struct rpc_xprt *xprt = rqst->rq_xprt; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 596 | struct rpcrdma_req *req = rpcr_to_rdmar(rqst); |
| 597 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
Chuck Lever | 6ab5994 | 2014-07-29 17:23:43 -0400 | [diff] [blame] | 598 | int rc = 0; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 599 | |
Chuck Lever | 6ab5994 | 2014-07-29 17:23:43 -0400 | [diff] [blame] | 600 | if (req->rl_niovs == 0) |
Chuck Lever | c93c622 | 2014-05-28 10:35:14 -0400 | [diff] [blame] | 601 | rc = rpcrdma_marshal_req(rqst); |
Chuck Lever | 6ab5994 | 2014-07-29 17:23:43 -0400 | [diff] [blame] | 602 | else if (r_xprt->rx_ia.ri_memreg_strategy == RPCRDMA_FRMR) |
| 603 | rc = rpcrdma_marshal_chunks(rqst, 0); |
| 604 | if (rc < 0) |
| 605 | goto failed_marshal; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 606 | |
| 607 | if (req->rl_reply == NULL) /* e.g. reconnection */ |
| 608 | rpcrdma_recv_buffer_get(req); |
| 609 | |
| 610 | if (req->rl_reply) { |
| 611 | req->rl_reply->rr_func = rpcrdma_reply_handler; |
| 612 | /* this need only be done once, but... */ |
| 613 | req->rl_reply->rr_xprt = xprt; |
| 614 | } |
| 615 | |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 616 | /* Must suppress retransmit to maintain credits */ |
| 617 | if (req->rl_connect_cookie == xprt->connect_cookie) |
| 618 | goto drop_connection; |
| 619 | req->rl_connect_cookie = xprt->connect_cookie; |
| 620 | |
| 621 | if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req)) |
| 622 | goto drop_connection; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 623 | |
Trond Myklebust | d60dbb2 | 2010-05-13 12:51:49 -0400 | [diff] [blame] | 624 | rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len; |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 625 | rqst->rq_bytes_sent = 0; |
| 626 | return 0; |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 627 | |
Chuck Lever | c93c622 | 2014-05-28 10:35:14 -0400 | [diff] [blame] | 628 | failed_marshal: |
| 629 | r_xprt->rx_stats.failed_marshal_count++; |
| 630 | dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n", |
| 631 | __func__, rc); |
| 632 | if (rc == -EIO) |
| 633 | return -EIO; |
Tom Talpey | 575448b | 2008-10-09 15:00:40 -0400 | [diff] [blame] | 634 | drop_connection: |
| 635 | xprt_disconnect_done(xprt); |
| 636 | return -ENOTCONN; /* implies disconnect */ |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | static void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) |
| 640 | { |
| 641 | struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); |
| 642 | long idle_time = 0; |
| 643 | |
| 644 | if (xprt_connected(xprt)) |
| 645 | idle_time = (long)(jiffies - xprt->last_used) / HZ; |
| 646 | |
| 647 | seq_printf(seq, |
| 648 | "\txprt:\trdma %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu " |
| 649 | "%lu %lu %lu %Lu %Lu %Lu %Lu %lu %lu %lu\n", |
| 650 | |
| 651 | 0, /* need a local port? */ |
| 652 | xprt->stat.bind_count, |
| 653 | xprt->stat.connect_count, |
| 654 | xprt->stat.connect_time, |
| 655 | idle_time, |
| 656 | xprt->stat.sends, |
| 657 | xprt->stat.recvs, |
| 658 | xprt->stat.bad_xids, |
| 659 | xprt->stat.req_u, |
| 660 | xprt->stat.bklog_u, |
| 661 | |
| 662 | r_xprt->rx_stats.read_chunk_count, |
| 663 | r_xprt->rx_stats.write_chunk_count, |
| 664 | r_xprt->rx_stats.reply_chunk_count, |
| 665 | r_xprt->rx_stats.total_rdma_request, |
| 666 | r_xprt->rx_stats.total_rdma_reply, |
| 667 | r_xprt->rx_stats.pullup_copy_count, |
| 668 | r_xprt->rx_stats.fixup_copy_count, |
| 669 | r_xprt->rx_stats.hardway_register_count, |
| 670 | r_xprt->rx_stats.failed_marshal_count, |
| 671 | r_xprt->rx_stats.bad_reply_count); |
| 672 | } |
| 673 | |
| 674 | /* |
| 675 | * Plumbing for rpc transport switch and kernel module |
| 676 | */ |
| 677 | |
| 678 | static struct rpc_xprt_ops xprt_rdma_procs = { |
Chuck Lever | e7ce710 | 2014-05-28 10:34:57 -0400 | [diff] [blame] | 679 | .reserve_xprt = xprt_reserve_xprt_cong, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 680 | .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */ |
Trond Myklebust | f39c1bf | 2012-09-07 11:08:50 -0400 | [diff] [blame] | 681 | .alloc_slot = xprt_alloc_slot, |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 682 | .release_request = xprt_release_rqst_cong, /* ditto */ |
| 683 | .set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */ |
| 684 | .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */ |
| 685 | .set_port = xprt_rdma_set_port, |
| 686 | .connect = xprt_rdma_connect, |
| 687 | .buf_alloc = xprt_rdma_allocate, |
| 688 | .buf_free = xprt_rdma_free, |
| 689 | .send_request = xprt_rdma_send_request, |
| 690 | .close = xprt_rdma_close, |
| 691 | .destroy = xprt_rdma_destroy, |
| 692 | .print_stats = xprt_rdma_print_stats |
| 693 | }; |
| 694 | |
| 695 | static struct xprt_class xprt_rdma = { |
| 696 | .list = LIST_HEAD_INIT(xprt_rdma.list), |
| 697 | .name = "rdma", |
| 698 | .owner = THIS_MODULE, |
| 699 | .ident = XPRT_TRANSPORT_RDMA, |
| 700 | .setup = xprt_setup_rdma, |
| 701 | }; |
| 702 | |
| 703 | static void __exit xprt_rdma_cleanup(void) |
| 704 | { |
| 705 | int rc; |
| 706 | |
Chuck Lever | 3a0799a | 2014-03-12 12:51:39 -0400 | [diff] [blame] | 707 | dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n"); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 708 | #ifdef RPC_DEBUG |
| 709 | if (sunrpc_table_header) { |
| 710 | unregister_sysctl_table(sunrpc_table_header); |
| 711 | sunrpc_table_header = NULL; |
| 712 | } |
| 713 | #endif |
| 714 | rc = xprt_unregister_transport(&xprt_rdma); |
| 715 | if (rc) |
| 716 | dprintk("RPC: %s: xprt_unregister returned %i\n", |
| 717 | __func__, rc); |
| 718 | } |
| 719 | |
| 720 | static int __init xprt_rdma_init(void) |
| 721 | { |
| 722 | int rc; |
| 723 | |
| 724 | rc = xprt_register_transport(&xprt_rdma); |
| 725 | |
| 726 | if (rc) |
| 727 | return rc; |
| 728 | |
Chuck Lever | 3a0799a | 2014-03-12 12:51:39 -0400 | [diff] [blame] | 729 | dprintk("RPCRDMA Module Init, register RPC RDMA transport\n"); |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 730 | |
Chuck Lever | 3a0799a | 2014-03-12 12:51:39 -0400 | [diff] [blame] | 731 | dprintk("Defaults:\n"); |
| 732 | dprintk("\tSlots %d\n" |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 733 | "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n", |
| 734 | xprt_rdma_slot_table_entries, |
| 735 | xprt_rdma_max_inline_read, xprt_rdma_max_inline_write); |
Chuck Lever | 3a0799a | 2014-03-12 12:51:39 -0400 | [diff] [blame] | 736 | dprintk("\tPadding %d\n\tMemreg %d\n", |
\"Talpey, Thomas\ | f58851e | 2007-09-10 13:50:12 -0400 | [diff] [blame] | 737 | xprt_rdma_inline_write_padding, xprt_rdma_memreg_strategy); |
| 738 | |
| 739 | #ifdef RPC_DEBUG |
| 740 | if (!sunrpc_table_header) |
| 741 | sunrpc_table_header = register_sysctl_table(sunrpc_table); |
| 742 | #endif |
| 743 | return 0; |
| 744 | } |
| 745 | |
| 746 | module_init(xprt_rdma_init); |
| 747 | module_exit(xprt_rdma_cleanup); |