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bcf3ffd4 | 1 | // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
377f9b2f | 2 | /* |
4201c746 | 3 | * Copyright (c) 2015-2018 Oracle. All rights reserved. |
0bf48289 | 4 | * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. |
377f9b2f TT |
5 | * Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved. |
6 | * | |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the BSD-type | |
11 | * license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions | |
15 | * are met: | |
16 | * | |
17 | * Redistributions of source code must retain the above copyright | |
18 | * notice, this list of conditions and the following disclaimer. | |
19 | * | |
20 | * Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials provided | |
23 | * with the distribution. | |
24 | * | |
25 | * Neither the name of the Network Appliance, Inc. nor the names of | |
26 | * its contributors may be used to endorse or promote products | |
27 | * derived from this software without specific prior written | |
28 | * permission. | |
29 | * | |
30 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
31 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
32 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
33 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
34 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
35 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
36 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
37 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
38 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
39 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
40 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
41 | * | |
42 | * Author: Tom Tucker <tom@opengridcomputing.com> | |
43 | */ | |
44 | ||
a6b7a407 | 45 | #include <linux/interrupt.h> |
d43c36dc | 46 | #include <linux/sched.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
377f9b2f | 48 | #include <linux/spinlock.h> |
a25e758c | 49 | #include <linux/workqueue.h> |
98895edb CL |
50 | #include <linux/export.h> |
51 | ||
377f9b2f TT |
52 | #include <rdma/ib_verbs.h> |
53 | #include <rdma/rdma_cm.h> | |
26fb2254 | 54 | #include <rdma/rw.h> |
98895edb CL |
55 | |
56 | #include <linux/sunrpc/addr.h> | |
57 | #include <linux/sunrpc/debug.h> | |
58 | #include <linux/sunrpc/rpc_rdma.h> | |
59 | #include <linux/sunrpc/svc_xprt.h> | |
377f9b2f | 60 | #include <linux/sunrpc/svc_rdma.h> |
98895edb | 61 | |
cec56c8f | 62 | #include "xprt_rdma.h" |
98895edb | 63 | #include <trace/events/rpcrdma.h> |
377f9b2f TT |
64 | |
65 | #define RPCDBG_FACILITY RPCDBG_SVCXPRT | |
66 | ||
8dafcbee CL |
67 | static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv, |
68 | struct net *net); | |
377f9b2f | 69 | static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, |
62832c03 | 70 | struct net *net, |
377f9b2f TT |
71 | struct sockaddr *sa, int salen, |
72 | int flags); | |
73 | static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt); | |
377f9b2f TT |
74 | static void svc_rdma_detach(struct svc_xprt *xprt); |
75 | static void svc_rdma_free(struct svc_xprt *xprt); | |
76 | static int svc_rdma_has_wspace(struct svc_xprt *xprt); | |
989f881e | 77 | static void svc_rdma_secure_port(struct svc_rqst *); |
ea08e392 | 78 | static void svc_rdma_kill_temp_xprt(struct svc_xprt *); |
377f9b2f | 79 | |
2412e927 | 80 | static const struct svc_xprt_ops svc_rdma_ops = { |
377f9b2f TT |
81 | .xpo_create = svc_rdma_create, |
82 | .xpo_recvfrom = svc_rdma_recvfrom, | |
83 | .xpo_sendto = svc_rdma_sendto, | |
41205539 | 84 | .xpo_read_payload = svc_rdma_read_payload, |
377f9b2f TT |
85 | .xpo_release_rqst = svc_rdma_release_rqst, |
86 | .xpo_detach = svc_rdma_detach, | |
87 | .xpo_free = svc_rdma_free, | |
377f9b2f TT |
88 | .xpo_has_wspace = svc_rdma_has_wspace, |
89 | .xpo_accept = svc_rdma_accept, | |
16e4d93f | 90 | .xpo_secure_port = svc_rdma_secure_port, |
ea08e392 | 91 | .xpo_kill_temp_xprt = svc_rdma_kill_temp_xprt, |
377f9b2f TT |
92 | }; |
93 | ||
94 | struct svc_xprt_class svc_rdma_class = { | |
95 | .xcl_name = "rdma", | |
96 | .xcl_owner = THIS_MODULE, | |
97 | .xcl_ops = &svc_rdma_ops, | |
cc9a903d | 98 | .xcl_max_payload = RPCSVC_MAXPAYLOAD_RDMA, |
3c45ddf8 | 99 | .xcl_ident = XPRT_TRANSPORT_RDMA, |
377f9b2f TT |
100 | }; |
101 | ||
377f9b2f TT |
102 | /* QP event handler */ |
103 | static void qp_event_handler(struct ib_event *event, void *context) | |
104 | { | |
105 | struct svc_xprt *xprt = context; | |
106 | ||
bd2abef3 | 107 | trace_svcrdma_qp_error(event, (struct sockaddr *)&xprt->xpt_remote); |
377f9b2f TT |
108 | switch (event->event) { |
109 | /* These are considered benign events */ | |
110 | case IB_EVENT_PATH_MIG: | |
111 | case IB_EVENT_COMM_EST: | |
112 | case IB_EVENT_SQ_DRAINED: | |
113 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
377f9b2f | 114 | break; |
bd2abef3 | 115 | |
377f9b2f TT |
116 | /* These are considered fatal events */ |
117 | case IB_EVENT_PATH_MIG_ERR: | |
118 | case IB_EVENT_QP_FATAL: | |
119 | case IB_EVENT_QP_REQ_ERR: | |
120 | case IB_EVENT_QP_ACCESS_ERR: | |
121 | case IB_EVENT_DEVICE_FATAL: | |
122 | default: | |
377f9b2f | 123 | set_bit(XPT_CLOSE, &xprt->xpt_flags); |
77a08867 | 124 | svc_xprt_enqueue(xprt); |
377f9b2f TT |
125 | break; |
126 | } | |
127 | } | |
128 | ||
8dafcbee CL |
129 | static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv, |
130 | struct net *net) | |
377f9b2f TT |
131 | { |
132 | struct svcxprt_rdma *cma_xprt = kzalloc(sizeof *cma_xprt, GFP_KERNEL); | |
133 | ||
8dafcbee CL |
134 | if (!cma_xprt) { |
135 | dprintk("svcrdma: failed to create new transport\n"); | |
377f9b2f | 136 | return NULL; |
8dafcbee CL |
137 | } |
138 | svc_xprt_init(net, &svc_rdma_class, &cma_xprt->sc_xprt, serv); | |
377f9b2f | 139 | INIT_LIST_HEAD(&cma_xprt->sc_accept_q); |
377f9b2f TT |
140 | INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q); |
141 | INIT_LIST_HEAD(&cma_xprt->sc_read_complete_q); | |
4201c746 | 142 | INIT_LIST_HEAD(&cma_xprt->sc_send_ctxts); |
4866073e | 143 | init_llist_head(&cma_xprt->sc_recv_ctxts); |
f13193f5 | 144 | INIT_LIST_HEAD(&cma_xprt->sc_rw_ctxts); |
377f9b2f TT |
145 | init_waitqueue_head(&cma_xprt->sc_send_wait); |
146 | ||
147 | spin_lock_init(&cma_xprt->sc_lock); | |
377f9b2f | 148 | spin_lock_init(&cma_xprt->sc_rq_dto_lock); |
4201c746 | 149 | spin_lock_init(&cma_xprt->sc_send_lock); |
f13193f5 | 150 | spin_lock_init(&cma_xprt->sc_rw_ctxt_lock); |
377f9b2f | 151 | |
362142b2 JL |
152 | /* |
153 | * Note that this implies that the underlying transport support | |
154 | * has some form of congestion control (see RFC 7530 section 3.1 | |
155 | * paragraph 2). For now, we assume that all supported RDMA | |
156 | * transports are suitable here. | |
157 | */ | |
158 | set_bit(XPT_CONG_CTRL, &cma_xprt->sc_xprt.xpt_flags); | |
159 | ||
377f9b2f TT |
160 | return cma_xprt; |
161 | } | |
162 | ||
cc9d8340 CL |
163 | static void |
164 | svc_rdma_parse_connect_private(struct svcxprt_rdma *newxprt, | |
165 | struct rdma_conn_param *param) | |
166 | { | |
167 | const struct rpcrdma_connect_private *pmsg = param->private_data; | |
168 | ||
169 | if (pmsg && | |
170 | pmsg->cp_magic == rpcrdma_cmp_magic && | |
171 | pmsg->cp_version == RPCRDMA_CMP_VERSION) { | |
25d55296 CL |
172 | newxprt->sc_snd_w_inv = pmsg->cp_flags & |
173 | RPCRDMA_CMP_F_SND_W_INV_OK; | |
174 | ||
175 | dprintk("svcrdma: client send_size %u, recv_size %u " | |
176 | "remote inv %ssupported\n", | |
cc9d8340 | 177 | rpcrdma_decode_buffer_size(pmsg->cp_send_size), |
25d55296 CL |
178 | rpcrdma_decode_buffer_size(pmsg->cp_recv_size), |
179 | newxprt->sc_snd_w_inv ? "" : "un"); | |
cc9d8340 CL |
180 | } |
181 | } | |
182 | ||
377f9b2f TT |
183 | /* |
184 | * This function handles the CONNECT_REQUEST event on a listening | |
185 | * endpoint. It is passed the cma_id for the _new_ connection. The context in | |
186 | * this cma_id is inherited from the listening cma_id and is the svc_xprt | |
187 | * structure for the listening endpoint. | |
188 | * | |
189 | * This function creates a new xprt for the new connection and enqueues it on | |
190 | * the accept queue for the listent xprt. When the listen thread is kicked, it | |
191 | * will call the recvfrom method on the listen xprt which will accept the new | |
192 | * connection. | |
193 | */ | |
cc9d8340 CL |
194 | static void handle_connect_req(struct rdma_cm_id *new_cma_id, |
195 | struct rdma_conn_param *param) | |
377f9b2f TT |
196 | { |
197 | struct svcxprt_rdma *listen_xprt = new_cma_id->context; | |
198 | struct svcxprt_rdma *newxprt; | |
af261af4 | 199 | struct sockaddr *sa; |
377f9b2f TT |
200 | |
201 | /* Create a new transport */ | |
8dafcbee CL |
202 | newxprt = svc_rdma_create_xprt(listen_xprt->sc_xprt.xpt_server, |
203 | listen_xprt->sc_xprt.xpt_net); | |
204 | if (!newxprt) | |
377f9b2f | 205 | return; |
377f9b2f TT |
206 | newxprt->sc_cm_id = new_cma_id; |
207 | new_cma_id->context = newxprt; | |
cc9d8340 | 208 | svc_rdma_parse_connect_private(newxprt, param); |
377f9b2f | 209 | |
36ef25e4 | 210 | /* Save client advertised inbound read limit for use later in accept. */ |
cc9d8340 | 211 | newxprt->sc_ord = param->initiator_depth; |
36ef25e4 | 212 | |
af261af4 TT |
213 | sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr; |
214 | svc_xprt_set_remote(&newxprt->sc_xprt, sa, svc_addr_len(sa)); | |
1e091c3b CL |
215 | /* The remote port is arbitrary and not under the control of the |
216 | * client ULP. Set it to a fixed value so that the DRC continues | |
217 | * to be effective after a reconnect. | |
218 | */ | |
219 | rpc_set_port((struct sockaddr *)&newxprt->sc_xprt.xpt_remote, 0); | |
220 | ||
af261af4 TT |
221 | sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr; |
222 | svc_xprt_set_local(&newxprt->sc_xprt, sa, svc_addr_len(sa)); | |
223 | ||
377f9b2f TT |
224 | /* |
225 | * Enqueue the new transport on the accept queue of the listening | |
226 | * transport | |
227 | */ | |
b5e92419 | 228 | spin_lock(&listen_xprt->sc_lock); |
377f9b2f | 229 | list_add_tail(&newxprt->sc_accept_q, &listen_xprt->sc_accept_q); |
b5e92419 | 230 | spin_unlock(&listen_xprt->sc_lock); |
377f9b2f | 231 | |
377f9b2f TT |
232 | set_bit(XPT_CONN, &listen_xprt->sc_xprt.xpt_flags); |
233 | svc_xprt_enqueue(&listen_xprt->sc_xprt); | |
234 | } | |
235 | ||
236 | /* | |
237 | * Handles events generated on the listening endpoint. These events will be | |
238 | * either be incoming connect requests or adapter removal events. | |
239 | */ | |
240 | static int rdma_listen_handler(struct rdma_cm_id *cma_id, | |
241 | struct rdma_cm_event *event) | |
242 | { | |
377f9b2f TT |
243 | switch (event->event) { |
244 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
245 | dprintk("svcrdma: Connect request on cma_id=%p, xprt = %p, " | |
76357c71 SG |
246 | "event = %s (%d)\n", cma_id, cma_id->context, |
247 | rdma_event_msg(event->event), event->event); | |
cc9d8340 | 248 | handle_connect_req(cma_id, &event->param.conn); |
377f9b2f | 249 | break; |
377f9b2f | 250 | default: |
bd2abef3 | 251 | /* NB: No device removal upcall for INADDR_ANY listeners */ |
377f9b2f | 252 | dprintk("svcrdma: Unexpected event on listening endpoint %p, " |
76357c71 SG |
253 | "event = %s (%d)\n", cma_id, |
254 | rdma_event_msg(event->event), event->event); | |
377f9b2f TT |
255 | break; |
256 | } | |
257 | ||
ac5bb5b3 | 258 | return 0; |
377f9b2f TT |
259 | } |
260 | ||
261 | static int rdma_cma_handler(struct rdma_cm_id *cma_id, | |
262 | struct rdma_cm_event *event) | |
263 | { | |
bd2abef3 CL |
264 | struct svcxprt_rdma *rdma = cma_id->context; |
265 | struct svc_xprt *xprt = &rdma->sc_xprt; | |
266 | ||
377f9b2f TT |
267 | switch (event->event) { |
268 | case RDMA_CM_EVENT_ESTABLISHED: | |
269 | /* Accept complete */ | |
c48cbb40 | 270 | svc_xprt_get(xprt); |
377f9b2f TT |
271 | dprintk("svcrdma: Connection completed on DTO xprt=%p, " |
272 | "cm_id=%p\n", xprt, cma_id); | |
273 | clear_bit(RDMAXPRT_CONN_PENDING, &rdma->sc_flags); | |
274 | svc_xprt_enqueue(xprt); | |
275 | break; | |
276 | case RDMA_CM_EVENT_DISCONNECTED: | |
277 | dprintk("svcrdma: Disconnect on DTO xprt=%p, cm_id=%p\n", | |
278 | xprt, cma_id); | |
bd2abef3 CL |
279 | set_bit(XPT_CLOSE, &xprt->xpt_flags); |
280 | svc_xprt_enqueue(xprt); | |
281 | svc_xprt_put(xprt); | |
377f9b2f TT |
282 | break; |
283 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
284 | dprintk("svcrdma: Device removal cma_id=%p, xprt = %p, " | |
76357c71 SG |
285 | "event = %s (%d)\n", cma_id, xprt, |
286 | rdma_event_msg(event->event), event->event); | |
bd2abef3 CL |
287 | set_bit(XPT_CLOSE, &xprt->xpt_flags); |
288 | svc_xprt_enqueue(xprt); | |
289 | svc_xprt_put(xprt); | |
377f9b2f TT |
290 | break; |
291 | default: | |
292 | dprintk("svcrdma: Unexpected event on DTO endpoint %p, " | |
76357c71 SG |
293 | "event = %s (%d)\n", cma_id, |
294 | rdma_event_msg(event->event), event->event); | |
377f9b2f TT |
295 | break; |
296 | } | |
297 | return 0; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Create a listening RDMA service endpoint. | |
302 | */ | |
303 | static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, | |
62832c03 | 304 | struct net *net, |
377f9b2f TT |
305 | struct sockaddr *sa, int salen, |
306 | int flags) | |
307 | { | |
308 | struct rdma_cm_id *listen_id; | |
309 | struct svcxprt_rdma *cma_xprt; | |
377f9b2f TT |
310 | int ret; |
311 | ||
8dafcbee | 312 | dprintk("svcrdma: Creating RDMA listener\n"); |
696190ea | 313 | if ((sa->sa_family != AF_INET) && (sa->sa_family != AF_INET6)) { |
bade732a TT |
314 | dprintk("svcrdma: Address family %d is not supported.\n", sa->sa_family); |
315 | return ERR_PTR(-EAFNOSUPPORT); | |
316 | } | |
8dafcbee | 317 | cma_xprt = svc_rdma_create_xprt(serv, net); |
377f9b2f | 318 | if (!cma_xprt) |
58e8f621 | 319 | return ERR_PTR(-ENOMEM); |
8dafcbee CL |
320 | set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags); |
321 | strcpy(cma_xprt->sc_xprt.xpt_remotebuf, "listener"); | |
377f9b2f | 322 | |
8dafcbee | 323 | listen_id = rdma_create_id(net, rdma_listen_handler, cma_xprt, |
fa20105e | 324 | RDMA_PS_TCP, IB_QPT_RC); |
377f9b2f | 325 | if (IS_ERR(listen_id)) { |
58e8f621 TT |
326 | ret = PTR_ERR(listen_id); |
327 | dprintk("svcrdma: rdma_create_id failed = %d\n", ret); | |
328 | goto err0; | |
377f9b2f | 329 | } |
58e8f621 | 330 | |
696190ea SM |
331 | /* Allow both IPv4 and IPv6 sockets to bind a single port |
332 | * at the same time. | |
333 | */ | |
334 | #if IS_ENABLED(CONFIG_IPV6) | |
335 | ret = rdma_set_afonly(listen_id, 1); | |
336 | if (ret) { | |
337 | dprintk("svcrdma: rdma_set_afonly failed = %d\n", ret); | |
338 | goto err1; | |
339 | } | |
340 | #endif | |
377f9b2f TT |
341 | ret = rdma_bind_addr(listen_id, sa); |
342 | if (ret) { | |
377f9b2f | 343 | dprintk("svcrdma: rdma_bind_addr failed = %d\n", ret); |
58e8f621 | 344 | goto err1; |
377f9b2f TT |
345 | } |
346 | cma_xprt->sc_cm_id = listen_id; | |
347 | ||
348 | ret = rdma_listen(listen_id, RPCRDMA_LISTEN_BACKLOG); | |
349 | if (ret) { | |
377f9b2f | 350 | dprintk("svcrdma: rdma_listen failed = %d\n", ret); |
58e8f621 | 351 | goto err1; |
377f9b2f TT |
352 | } |
353 | ||
354 | /* | |
355 | * We need to use the address from the cm_id in case the | |
356 | * caller specified 0 for the port number. | |
357 | */ | |
358 | sa = (struct sockaddr *)&cma_xprt->sc_cm_id->route.addr.src_addr; | |
359 | svc_xprt_set_local(&cma_xprt->sc_xprt, sa, salen); | |
360 | ||
361 | return &cma_xprt->sc_xprt; | |
58e8f621 TT |
362 | |
363 | err1: | |
364 | rdma_destroy_id(listen_id); | |
365 | err0: | |
366 | kfree(cma_xprt); | |
367 | return ERR_PTR(ret); | |
377f9b2f TT |
368 | } |
369 | ||
370 | /* | |
371 | * This is the xpo_recvfrom function for listening endpoints. Its | |
372 | * purpose is to accept incoming connections. The CMA callback handler | |
373 | * has already created a new transport and attached it to the new CMA | |
374 | * ID. | |
375 | * | |
376 | * There is a queue of pending connections hung on the listening | |
377 | * transport. This queue contains the new svc_xprt structure. This | |
378 | * function takes svc_xprt structures off the accept_q and completes | |
379 | * the connection. | |
380 | */ | |
381 | static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) | |
382 | { | |
383 | struct svcxprt_rdma *listen_rdma; | |
384 | struct svcxprt_rdma *newxprt = NULL; | |
385 | struct rdma_conn_param conn_param; | |
cc9d8340 | 386 | struct rpcrdma_connect_private pmsg; |
377f9b2f | 387 | struct ib_qp_init_attr qp_attr; |
2c577bfe | 388 | unsigned int ctxts, rq_depth; |
e3e45b1b | 389 | struct ib_device *dev; |
e3e45b1b | 390 | int ret = 0; |
c7920f06 | 391 | RPC_IFDEBUG(struct sockaddr *sap); |
377f9b2f TT |
392 | |
393 | listen_rdma = container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
394 | clear_bit(XPT_CONN, &xprt->xpt_flags); | |
395 | /* Get the next entry off the accept list */ | |
b5e92419 | 396 | spin_lock(&listen_rdma->sc_lock); |
377f9b2f TT |
397 | if (!list_empty(&listen_rdma->sc_accept_q)) { |
398 | newxprt = list_entry(listen_rdma->sc_accept_q.next, | |
399 | struct svcxprt_rdma, sc_accept_q); | |
400 | list_del_init(&newxprt->sc_accept_q); | |
401 | } | |
402 | if (!list_empty(&listen_rdma->sc_accept_q)) | |
403 | set_bit(XPT_CONN, &listen_rdma->sc_xprt.xpt_flags); | |
b5e92419 | 404 | spin_unlock(&listen_rdma->sc_lock); |
377f9b2f TT |
405 | if (!newxprt) |
406 | return NULL; | |
407 | ||
408 | dprintk("svcrdma: newxprt from accept queue = %p, cm_id=%p\n", | |
409 | newxprt, newxprt->sc_cm_id); | |
410 | ||
e3e45b1b | 411 | dev = newxprt->sc_cm_id->device; |
f13193f5 | 412 | newxprt->sc_port_num = newxprt->sc_cm_id->port_num; |
377f9b2f TT |
413 | |
414 | /* Qualify the transport resource defaults with the | |
415 | * capabilities of this particular device */ | |
f3c1fd0e CL |
416 | /* Transport header, head iovec, tail iovec */ |
417 | newxprt->sc_max_send_sges = 3; | |
418 | /* Add one SGE per page list entry */ | |
e248aa7b CL |
419 | newxprt->sc_max_send_sges += (svcrdma_max_req_size / PAGE_SIZE) + 1; |
420 | if (newxprt->sc_max_send_sges > dev->attrs.max_send_sge) | |
421 | newxprt->sc_max_send_sges = dev->attrs.max_send_sge; | |
3d61677c | 422 | newxprt->sc_max_req_size = svcrdma_max_req_size; |
5a25bfd2 CL |
423 | newxprt->sc_max_requests = svcrdma_max_requests; |
424 | newxprt->sc_max_bc_requests = svcrdma_max_bc_requests; | |
2c577bfe CL |
425 | rq_depth = newxprt->sc_max_requests + newxprt->sc_max_bc_requests; |
426 | if (rq_depth > dev->attrs.max_qp_wr) { | |
5a25bfd2 CL |
427 | pr_warn("svcrdma: reducing receive depth to %d\n", |
428 | dev->attrs.max_qp_wr); | |
2c577bfe CL |
429 | rq_depth = dev->attrs.max_qp_wr; |
430 | newxprt->sc_max_requests = rq_depth - 2; | |
5a25bfd2 CL |
431 | newxprt->sc_max_bc_requests = 2; |
432 | } | |
433 | newxprt->sc_fc_credits = cpu_to_be32(newxprt->sc_max_requests); | |
26fb2254 CL |
434 | ctxts = rdma_rw_mr_factor(dev, newxprt->sc_port_num, RPCSVC_MAXPAGES); |
435 | ctxts *= newxprt->sc_max_requests; | |
2c577bfe | 436 | newxprt->sc_sq_depth = rq_depth + ctxts; |
26fb2254 CL |
437 | if (newxprt->sc_sq_depth > dev->attrs.max_qp_wr) { |
438 | pr_warn("svcrdma: reducing send depth to %d\n", | |
439 | dev->attrs.max_qp_wr); | |
440 | newxprt->sc_sq_depth = dev->attrs.max_qp_wr; | |
441 | } | |
e4eb42ce | 442 | atomic_set(&newxprt->sc_sq_avail, newxprt->sc_sq_depth); |
377f9b2f | 443 | |
ed082d36 | 444 | newxprt->sc_pd = ib_alloc_pd(dev, 0); |
377f9b2f TT |
445 | if (IS_ERR(newxprt->sc_pd)) { |
446 | dprintk("svcrdma: error creating PD for connect request\n"); | |
447 | goto errout; | |
448 | } | |
20cf4e02 CL |
449 | newxprt->sc_sq_cq = ib_alloc_cq_any(dev, newxprt, newxprt->sc_sq_depth, |
450 | IB_POLL_WORKQUEUE); | |
377f9b2f TT |
451 | if (IS_ERR(newxprt->sc_sq_cq)) { |
452 | dprintk("svcrdma: error creating SQ CQ for connect request\n"); | |
453 | goto errout; | |
454 | } | |
20cf4e02 CL |
455 | newxprt->sc_rq_cq = |
456 | ib_alloc_cq_any(dev, newxprt, rq_depth, IB_POLL_WORKQUEUE); | |
377f9b2f TT |
457 | if (IS_ERR(newxprt->sc_rq_cq)) { |
458 | dprintk("svcrdma: error creating RQ CQ for connect request\n"); | |
459 | goto errout; | |
460 | } | |
461 | ||
462 | memset(&qp_attr, 0, sizeof qp_attr); | |
463 | qp_attr.event_handler = qp_event_handler; | |
464 | qp_attr.qp_context = &newxprt->sc_xprt; | |
9450ca8e | 465 | qp_attr.port_num = newxprt->sc_port_num; |
26fb2254 CL |
466 | qp_attr.cap.max_rdma_ctxs = ctxts; |
467 | qp_attr.cap.max_send_wr = newxprt->sc_sq_depth - ctxts; | |
2c577bfe | 468 | qp_attr.cap.max_recv_wr = rq_depth; |
25fd86ec | 469 | qp_attr.cap.max_send_sge = newxprt->sc_max_send_sges; |
3316f063 | 470 | qp_attr.cap.max_recv_sge = 1; |
377f9b2f TT |
471 | qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR; |
472 | qp_attr.qp_type = IB_QPT_RC; | |
473 | qp_attr.send_cq = newxprt->sc_sq_cq; | |
474 | qp_attr.recv_cq = newxprt->sc_rq_cq; | |
07257450 CL |
475 | dprintk("svcrdma: newxprt->sc_cm_id=%p, newxprt->sc_pd=%p\n", |
476 | newxprt->sc_cm_id, newxprt->sc_pd); | |
477 | dprintk(" cap.max_send_wr = %d, cap.max_recv_wr = %d\n", | |
478 | qp_attr.cap.max_send_wr, qp_attr.cap.max_recv_wr); | |
479 | dprintk(" cap.max_send_sge = %d, cap.max_recv_sge = %d\n", | |
480 | qp_attr.cap.max_send_sge, qp_attr.cap.max_recv_sge); | |
377f9b2f TT |
481 | |
482 | ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, &qp_attr); | |
483 | if (ret) { | |
d1e458fe SW |
484 | dprintk("svcrdma: failed to create QP, ret=%d\n", ret); |
485 | goto errout; | |
377f9b2f TT |
486 | } |
487 | newxprt->sc_qp = newxprt->sc_cm_id->qp; | |
488 | ||
9450ca8e | 489 | if (!(dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) |
25d55296 | 490 | newxprt->sc_snd_w_inv = false; |
9450ca8e CL |
491 | if (!rdma_protocol_iwarp(dev, newxprt->sc_port_num) && |
492 | !rdma_ib_or_roce(dev, newxprt->sc_port_num)) | |
377f9b2f | 493 | goto errout; |
3de2c31c | 494 | |
ecf85b23 CL |
495 | if (!svc_rdma_post_recvs(newxprt)) |
496 | goto errout; | |
377f9b2f TT |
497 | |
498 | /* Swap out the handler */ | |
499 | newxprt->sc_cm_id->event_handler = rdma_cma_handler; | |
500 | ||
cc9d8340 CL |
501 | /* Construct RDMA-CM private message */ |
502 | pmsg.cp_magic = rpcrdma_cmp_magic; | |
503 | pmsg.cp_version = RPCRDMA_CMP_VERSION; | |
504 | pmsg.cp_flags = 0; | |
505 | pmsg.cp_send_size = pmsg.cp_recv_size = | |
506 | rpcrdma_encode_buffer_size(newxprt->sc_max_req_size); | |
507 | ||
377f9b2f TT |
508 | /* Accept Connection */ |
509 | set_bit(RDMAXPRT_CONN_PENDING, &newxprt->sc_flags); | |
510 | memset(&conn_param, 0, sizeof conn_param); | |
511 | conn_param.responder_resources = 0; | |
97cc3264 CL |
512 | conn_param.initiator_depth = min_t(int, newxprt->sc_ord, |
513 | dev->attrs.max_qp_init_rd_atom); | |
514 | if (!conn_param.initiator_depth) { | |
515 | dprintk("svcrdma: invalid ORD setting\n"); | |
516 | ret = -EINVAL; | |
517 | goto errout; | |
518 | } | |
cc9d8340 CL |
519 | conn_param.private_data = &pmsg; |
520 | conn_param.private_data_len = sizeof(pmsg); | |
377f9b2f | 521 | ret = rdma_accept(newxprt->sc_cm_id, &conn_param); |
97cc3264 | 522 | if (ret) |
377f9b2f | 523 | goto errout; |
377f9b2f | 524 | |
c7920f06 | 525 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
07257450 CL |
526 | dprintk("svcrdma: new connection %p accepted:\n", newxprt); |
527 | sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr; | |
528 | dprintk(" local address : %pIS:%u\n", sap, rpc_get_port(sap)); | |
529 | sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr; | |
530 | dprintk(" remote address : %pIS:%u\n", sap, rpc_get_port(sap)); | |
25fd86ec | 531 | dprintk(" max_sge : %d\n", newxprt->sc_max_send_sges); |
07257450 | 532 | dprintk(" sq_depth : %d\n", newxprt->sc_sq_depth); |
26fb2254 | 533 | dprintk(" rdma_rw_ctxs : %d\n", ctxts); |
07257450 | 534 | dprintk(" max_requests : %d\n", newxprt->sc_max_requests); |
97cc3264 | 535 | dprintk(" ord : %d\n", conn_param.initiator_depth); |
c7920f06 | 536 | #endif |
377f9b2f | 537 | |
98895edb | 538 | trace_svcrdma_xprt_accept(&newxprt->sc_xprt); |
377f9b2f TT |
539 | return &newxprt->sc_xprt; |
540 | ||
541 | errout: | |
542 | dprintk("svcrdma: failure accepting new connection rc=%d.\n", ret); | |
98895edb | 543 | trace_svcrdma_xprt_fail(&newxprt->sc_xprt); |
c48cbb40 TT |
544 | /* Take a reference in case the DTO handler runs */ |
545 | svc_xprt_get(&newxprt->sc_xprt); | |
1711386c | 546 | if (newxprt->sc_qp && !IS_ERR(newxprt->sc_qp)) |
c48cbb40 | 547 | ib_destroy_qp(newxprt->sc_qp); |
377f9b2f | 548 | rdma_destroy_id(newxprt->sc_cm_id); |
c48cbb40 TT |
549 | /* This call to put will destroy the transport */ |
550 | svc_xprt_put(&newxprt->sc_xprt); | |
377f9b2f TT |
551 | return NULL; |
552 | } | |
553 | ||
c48cbb40 | 554 | /* |
1711386c | 555 | * When connected, an svc_xprt has at least two references: |
c48cbb40 TT |
556 | * |
557 | * - A reference held by the cm_id between the ESTABLISHED and | |
558 | * DISCONNECTED events. If the remote peer disconnected first, this | |
559 | * reference could be gone. | |
560 | * | |
561 | * - A reference held by the svc_recv code that called this function | |
562 | * as part of close processing. | |
563 | * | |
1711386c | 564 | * At a minimum one references should still be held. |
c48cbb40 | 565 | */ |
377f9b2f TT |
566 | static void svc_rdma_detach(struct svc_xprt *xprt) |
567 | { | |
568 | struct svcxprt_rdma *rdma = | |
569 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
c48cbb40 TT |
570 | |
571 | /* Disconnect and flush posted WQE */ | |
377f9b2f | 572 | rdma_disconnect(rdma->sc_cm_id); |
377f9b2f TT |
573 | } |
574 | ||
8da91ea8 | 575 | static void __svc_rdma_free(struct work_struct *work) |
377f9b2f | 576 | { |
8da91ea8 TT |
577 | struct svcxprt_rdma *rdma = |
578 | container_of(work, struct svcxprt_rdma, sc_work); | |
5d252f90 CL |
579 | struct svc_xprt *xprt = &rdma->sc_xprt; |
580 | ||
98895edb | 581 | trace_svcrdma_xprt_free(xprt); |
8da91ea8 | 582 | |
76ee8fd6 CL |
583 | if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) |
584 | ib_drain_qp(rdma->sc_qp); | |
585 | ||
ecf85b23 | 586 | svc_rdma_flush_recv_queues(rdma); |
356d0a15 | 587 | |
5d252f90 CL |
588 | /* Final put of backchannel client transport */ |
589 | if (xprt->xpt_bc_xprt) { | |
590 | xprt_put(xprt->xpt_bc_xprt); | |
591 | xprt->xpt_bc_xprt = NULL; | |
592 | } | |
593 | ||
f13193f5 | 594 | svc_rdma_destroy_rw_ctxts(rdma); |
4201c746 | 595 | svc_rdma_send_ctxts_destroy(rdma); |
ecf85b23 | 596 | svc_rdma_recv_ctxts_destroy(rdma); |
64be8608 | 597 | |
1711386c TT |
598 | /* Destroy the QP if present (not a listener) */ |
599 | if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) | |
600 | ib_destroy_qp(rdma->sc_qp); | |
601 | ||
c48cbb40 | 602 | if (rdma->sc_sq_cq && !IS_ERR(rdma->sc_sq_cq)) |
be99bb11 | 603 | ib_free_cq(rdma->sc_sq_cq); |
377f9b2f | 604 | |
c48cbb40 | 605 | if (rdma->sc_rq_cq && !IS_ERR(rdma->sc_rq_cq)) |
8bd5ba86 | 606 | ib_free_cq(rdma->sc_rq_cq); |
377f9b2f | 607 | |
c48cbb40 TT |
608 | if (rdma->sc_pd && !IS_ERR(rdma->sc_pd)) |
609 | ib_dealloc_pd(rdma->sc_pd); | |
377f9b2f | 610 | |
356d0a15 TT |
611 | /* Destroy the CM ID */ |
612 | rdma_destroy_id(rdma->sc_cm_id); | |
613 | ||
c48cbb40 | 614 | kfree(rdma); |
377f9b2f TT |
615 | } |
616 | ||
8da91ea8 TT |
617 | static void svc_rdma_free(struct svc_xprt *xprt) |
618 | { | |
619 | struct svcxprt_rdma *rdma = | |
620 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
d6dfe43e | 621 | |
8da91ea8 | 622 | INIT_WORK(&rdma->sc_work, __svc_rdma_free); |
d6dfe43e | 623 | schedule_work(&rdma->sc_work); |
8da91ea8 TT |
624 | } |
625 | ||
377f9b2f TT |
626 | static int svc_rdma_has_wspace(struct svc_xprt *xprt) |
627 | { | |
628 | struct svcxprt_rdma *rdma = | |
629 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
630 | ||
631 | /* | |
0bf48289 | 632 | * If there are already waiters on the SQ, |
377f9b2f TT |
633 | * return false. |
634 | */ | |
635 | if (waitqueue_active(&rdma->sc_send_wait)) | |
636 | return 0; | |
637 | ||
638 | /* Otherwise return true. */ | |
639 | return 1; | |
640 | } | |
641 | ||
989f881e | 642 | static void svc_rdma_secure_port(struct svc_rqst *rqstp) |
16e4d93f | 643 | { |
989f881e | 644 | set_bit(RQ_SECURE, &rqstp->rq_flags); |
16e4d93f CL |
645 | } |
646 | ||
ea08e392 SM |
647 | static void svc_rdma_kill_temp_xprt(struct svc_xprt *xprt) |
648 | { | |
649 | } |