615 строки
19 KiB
C
615 строки
19 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright (c) 2015-2018 Oracle. All rights reserved.
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* Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved.
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* Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the BSD-type
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Network Appliance, Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: Tom Tucker <tom@opengridcomputing.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <linux/export.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_cm.h>
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#include <rdma/rw.h>
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#include <linux/sunrpc/addr.h>
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#include <linux/sunrpc/debug.h>
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#include <linux/sunrpc/svc_xprt.h>
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#include <linux/sunrpc/svc_rdma.h>
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#include "xprt_rdma.h"
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#include <trace/events/rpcrdma.h>
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#define RPCDBG_FACILITY RPCDBG_SVCXPRT
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static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv,
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struct net *net);
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static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
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struct net *net,
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struct sockaddr *sa, int salen,
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int flags);
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static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt);
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static void svc_rdma_detach(struct svc_xprt *xprt);
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static void svc_rdma_free(struct svc_xprt *xprt);
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static int svc_rdma_has_wspace(struct svc_xprt *xprt);
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static void svc_rdma_secure_port(struct svc_rqst *);
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static void svc_rdma_kill_temp_xprt(struct svc_xprt *);
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static const struct svc_xprt_ops svc_rdma_ops = {
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.xpo_create = svc_rdma_create,
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.xpo_recvfrom = svc_rdma_recvfrom,
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.xpo_sendto = svc_rdma_sendto,
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.xpo_read_payload = svc_rdma_read_payload,
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.xpo_release_rqst = svc_rdma_release_rqst,
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.xpo_detach = svc_rdma_detach,
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.xpo_free = svc_rdma_free,
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.xpo_has_wspace = svc_rdma_has_wspace,
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.xpo_accept = svc_rdma_accept,
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.xpo_secure_port = svc_rdma_secure_port,
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.xpo_kill_temp_xprt = svc_rdma_kill_temp_xprt,
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};
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struct svc_xprt_class svc_rdma_class = {
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.xcl_name = "rdma",
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.xcl_owner = THIS_MODULE,
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.xcl_ops = &svc_rdma_ops,
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.xcl_max_payload = RPCSVC_MAXPAYLOAD_RDMA,
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.xcl_ident = XPRT_TRANSPORT_RDMA,
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};
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/* QP event handler */
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static void qp_event_handler(struct ib_event *event, void *context)
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{
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struct svc_xprt *xprt = context;
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trace_svcrdma_qp_error(event, (struct sockaddr *)&xprt->xpt_remote);
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switch (event->event) {
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/* These are considered benign events */
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case IB_EVENT_PATH_MIG:
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case IB_EVENT_COMM_EST:
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case IB_EVENT_SQ_DRAINED:
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case IB_EVENT_QP_LAST_WQE_REACHED:
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break;
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/* These are considered fatal events */
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case IB_EVENT_PATH_MIG_ERR:
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case IB_EVENT_QP_FATAL:
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case IB_EVENT_QP_REQ_ERR:
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case IB_EVENT_QP_ACCESS_ERR:
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case IB_EVENT_DEVICE_FATAL:
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default:
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set_bit(XPT_CLOSE, &xprt->xpt_flags);
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svc_xprt_enqueue(xprt);
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break;
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}
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}
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static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv,
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struct net *net)
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{
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struct svcxprt_rdma *cma_xprt = kzalloc(sizeof *cma_xprt, GFP_KERNEL);
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if (!cma_xprt) {
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dprintk("svcrdma: failed to create new transport\n");
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return NULL;
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}
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svc_xprt_init(net, &svc_rdma_class, &cma_xprt->sc_xprt, serv);
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INIT_LIST_HEAD(&cma_xprt->sc_accept_q);
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INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q);
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INIT_LIST_HEAD(&cma_xprt->sc_read_complete_q);
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INIT_LIST_HEAD(&cma_xprt->sc_send_ctxts);
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init_llist_head(&cma_xprt->sc_recv_ctxts);
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INIT_LIST_HEAD(&cma_xprt->sc_rw_ctxts);
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init_waitqueue_head(&cma_xprt->sc_send_wait);
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spin_lock_init(&cma_xprt->sc_lock);
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spin_lock_init(&cma_xprt->sc_rq_dto_lock);
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spin_lock_init(&cma_xprt->sc_send_lock);
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spin_lock_init(&cma_xprt->sc_rw_ctxt_lock);
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/*
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* Note that this implies that the underlying transport support
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* has some form of congestion control (see RFC 7530 section 3.1
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* paragraph 2). For now, we assume that all supported RDMA
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* transports are suitable here.
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*/
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set_bit(XPT_CONG_CTRL, &cma_xprt->sc_xprt.xpt_flags);
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return cma_xprt;
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}
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static void
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svc_rdma_parse_connect_private(struct svcxprt_rdma *newxprt,
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struct rdma_conn_param *param)
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{
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const struct rpcrdma_connect_private *pmsg = param->private_data;
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if (pmsg &&
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pmsg->cp_magic == rpcrdma_cmp_magic &&
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pmsg->cp_version == RPCRDMA_CMP_VERSION) {
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newxprt->sc_snd_w_inv = pmsg->cp_flags &
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RPCRDMA_CMP_F_SND_W_INV_OK;
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dprintk("svcrdma: client send_size %u, recv_size %u "
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"remote inv %ssupported\n",
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rpcrdma_decode_buffer_size(pmsg->cp_send_size),
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rpcrdma_decode_buffer_size(pmsg->cp_recv_size),
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newxprt->sc_snd_w_inv ? "" : "un");
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}
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}
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/*
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* This function handles the CONNECT_REQUEST event on a listening
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* endpoint. It is passed the cma_id for the _new_ connection. The context in
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* this cma_id is inherited from the listening cma_id and is the svc_xprt
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* structure for the listening endpoint.
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*
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* This function creates a new xprt for the new connection and enqueues it on
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* the accept queue for the listent xprt. When the listen thread is kicked, it
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* will call the recvfrom method on the listen xprt which will accept the new
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* connection.
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*/
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static void handle_connect_req(struct rdma_cm_id *new_cma_id,
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struct rdma_conn_param *param)
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{
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struct svcxprt_rdma *listen_xprt = new_cma_id->context;
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struct svcxprt_rdma *newxprt;
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struct sockaddr *sa;
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/* Create a new transport */
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newxprt = svc_rdma_create_xprt(listen_xprt->sc_xprt.xpt_server,
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listen_xprt->sc_xprt.xpt_net);
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if (!newxprt)
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return;
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newxprt->sc_cm_id = new_cma_id;
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new_cma_id->context = newxprt;
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svc_rdma_parse_connect_private(newxprt, param);
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/* Save client advertised inbound read limit for use later in accept. */
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newxprt->sc_ord = param->initiator_depth;
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sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr;
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newxprt->sc_xprt.xpt_remotelen = svc_addr_len(sa);
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memcpy(&newxprt->sc_xprt.xpt_remote, sa,
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newxprt->sc_xprt.xpt_remotelen);
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snprintf(newxprt->sc_xprt.xpt_remotebuf,
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sizeof(newxprt->sc_xprt.xpt_remotebuf) - 1, "%pISc", sa);
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/* The remote port is arbitrary and not under the control of the
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* client ULP. Set it to a fixed value so that the DRC continues
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* to be effective after a reconnect.
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*/
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rpc_set_port((struct sockaddr *)&newxprt->sc_xprt.xpt_remote, 0);
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sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr;
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svc_xprt_set_local(&newxprt->sc_xprt, sa, svc_addr_len(sa));
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/*
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* Enqueue the new transport on the accept queue of the listening
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* transport
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*/
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spin_lock(&listen_xprt->sc_lock);
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list_add_tail(&newxprt->sc_accept_q, &listen_xprt->sc_accept_q);
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spin_unlock(&listen_xprt->sc_lock);
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set_bit(XPT_CONN, &listen_xprt->sc_xprt.xpt_flags);
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svc_xprt_enqueue(&listen_xprt->sc_xprt);
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}
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/**
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* svc_rdma_listen_handler - Handle CM events generated on a listening endpoint
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* @cma_id: the server's listener rdma_cm_id
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* @event: details of the event
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*
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* Return values:
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* %0: Do not destroy @cma_id
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* %1: Destroy @cma_id (never returned here)
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*
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* NB: There is never a DEVICE_REMOVAL event for INADDR_ANY listeners.
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*/
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static int svc_rdma_listen_handler(struct rdma_cm_id *cma_id,
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struct rdma_cm_event *event)
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{
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switch (event->event) {
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case RDMA_CM_EVENT_CONNECT_REQUEST:
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handle_connect_req(cma_id, &event->param.conn);
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break;
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default:
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break;
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}
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return 0;
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}
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/**
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* svc_rdma_cma_handler - Handle CM events on client connections
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* @cma_id: the server's listener rdma_cm_id
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* @event: details of the event
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*
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* Return values:
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* %0: Do not destroy @cma_id
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* %1: Destroy @cma_id (never returned here)
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*/
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static int svc_rdma_cma_handler(struct rdma_cm_id *cma_id,
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struct rdma_cm_event *event)
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{
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struct svcxprt_rdma *rdma = cma_id->context;
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struct svc_xprt *xprt = &rdma->sc_xprt;
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switch (event->event) {
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case RDMA_CM_EVENT_ESTABLISHED:
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clear_bit(RDMAXPRT_CONN_PENDING, &rdma->sc_flags);
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svc_xprt_enqueue(xprt);
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break;
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case RDMA_CM_EVENT_DISCONNECTED:
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case RDMA_CM_EVENT_DEVICE_REMOVAL:
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set_bit(XPT_CLOSE, &xprt->xpt_flags);
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svc_xprt_enqueue(xprt);
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break;
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default:
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break;
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}
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return 0;
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}
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/*
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* Create a listening RDMA service endpoint.
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*/
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static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
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struct net *net,
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struct sockaddr *sa, int salen,
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int flags)
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{
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struct rdma_cm_id *listen_id;
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struct svcxprt_rdma *cma_xprt;
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int ret;
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if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6)
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return ERR_PTR(-EAFNOSUPPORT);
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cma_xprt = svc_rdma_create_xprt(serv, net);
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if (!cma_xprt)
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return ERR_PTR(-ENOMEM);
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set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags);
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strcpy(cma_xprt->sc_xprt.xpt_remotebuf, "listener");
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listen_id = rdma_create_id(net, svc_rdma_listen_handler, cma_xprt,
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RDMA_PS_TCP, IB_QPT_RC);
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if (IS_ERR(listen_id)) {
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ret = PTR_ERR(listen_id);
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goto err0;
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}
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/* Allow both IPv4 and IPv6 sockets to bind a single port
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* at the same time.
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*/
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#if IS_ENABLED(CONFIG_IPV6)
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ret = rdma_set_afonly(listen_id, 1);
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if (ret)
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goto err1;
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#endif
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ret = rdma_bind_addr(listen_id, sa);
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if (ret)
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goto err1;
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cma_xprt->sc_cm_id = listen_id;
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ret = rdma_listen(listen_id, RPCRDMA_LISTEN_BACKLOG);
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if (ret)
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goto err1;
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/*
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* We need to use the address from the cm_id in case the
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* caller specified 0 for the port number.
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*/
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sa = (struct sockaddr *)&cma_xprt->sc_cm_id->route.addr.src_addr;
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svc_xprt_set_local(&cma_xprt->sc_xprt, sa, salen);
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return &cma_xprt->sc_xprt;
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err1:
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rdma_destroy_id(listen_id);
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err0:
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kfree(cma_xprt);
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return ERR_PTR(ret);
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}
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/*
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* This is the xpo_recvfrom function for listening endpoints. Its
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* purpose is to accept incoming connections. The CMA callback handler
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* has already created a new transport and attached it to the new CMA
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* ID.
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*
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* There is a queue of pending connections hung on the listening
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* transport. This queue contains the new svc_xprt structure. This
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* function takes svc_xprt structures off the accept_q and completes
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* the connection.
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*/
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static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt)
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{
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struct svcxprt_rdma *listen_rdma;
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struct svcxprt_rdma *newxprt = NULL;
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struct rdma_conn_param conn_param;
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struct rpcrdma_connect_private pmsg;
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struct ib_qp_init_attr qp_attr;
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unsigned int ctxts, rq_depth;
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struct ib_device *dev;
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int ret = 0;
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RPC_IFDEBUG(struct sockaddr *sap);
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listen_rdma = container_of(xprt, struct svcxprt_rdma, sc_xprt);
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clear_bit(XPT_CONN, &xprt->xpt_flags);
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/* Get the next entry off the accept list */
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spin_lock(&listen_rdma->sc_lock);
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if (!list_empty(&listen_rdma->sc_accept_q)) {
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newxprt = list_entry(listen_rdma->sc_accept_q.next,
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struct svcxprt_rdma, sc_accept_q);
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list_del_init(&newxprt->sc_accept_q);
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}
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if (!list_empty(&listen_rdma->sc_accept_q))
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set_bit(XPT_CONN, &listen_rdma->sc_xprt.xpt_flags);
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spin_unlock(&listen_rdma->sc_lock);
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if (!newxprt)
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return NULL;
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dev = newxprt->sc_cm_id->device;
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newxprt->sc_port_num = newxprt->sc_cm_id->port_num;
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/* Qualify the transport resource defaults with the
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* capabilities of this particular device */
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/* Transport header, head iovec, tail iovec */
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newxprt->sc_max_send_sges = 3;
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/* Add one SGE per page list entry */
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newxprt->sc_max_send_sges += (svcrdma_max_req_size / PAGE_SIZE) + 1;
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if (newxprt->sc_max_send_sges > dev->attrs.max_send_sge)
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newxprt->sc_max_send_sges = dev->attrs.max_send_sge;
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newxprt->sc_max_req_size = svcrdma_max_req_size;
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newxprt->sc_max_requests = svcrdma_max_requests;
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newxprt->sc_max_bc_requests = svcrdma_max_bc_requests;
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rq_depth = newxprt->sc_max_requests + newxprt->sc_max_bc_requests;
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if (rq_depth > dev->attrs.max_qp_wr) {
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pr_warn("svcrdma: reducing receive depth to %d\n",
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dev->attrs.max_qp_wr);
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rq_depth = dev->attrs.max_qp_wr;
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newxprt->sc_max_requests = rq_depth - 2;
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newxprt->sc_max_bc_requests = 2;
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}
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newxprt->sc_fc_credits = cpu_to_be32(newxprt->sc_max_requests);
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ctxts = rdma_rw_mr_factor(dev, newxprt->sc_port_num, RPCSVC_MAXPAGES);
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ctxts *= newxprt->sc_max_requests;
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newxprt->sc_sq_depth = rq_depth + ctxts;
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if (newxprt->sc_sq_depth > dev->attrs.max_qp_wr) {
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pr_warn("svcrdma: reducing send depth to %d\n",
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dev->attrs.max_qp_wr);
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newxprt->sc_sq_depth = dev->attrs.max_qp_wr;
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}
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atomic_set(&newxprt->sc_sq_avail, newxprt->sc_sq_depth);
|
|
|
|
newxprt->sc_pd = ib_alloc_pd(dev, 0);
|
|
if (IS_ERR(newxprt->sc_pd)) {
|
|
trace_svcrdma_pd_err(newxprt, PTR_ERR(newxprt->sc_pd));
|
|
goto errout;
|
|
}
|
|
newxprt->sc_sq_cq = ib_alloc_cq_any(dev, newxprt, newxprt->sc_sq_depth,
|
|
IB_POLL_WORKQUEUE);
|
|
if (IS_ERR(newxprt->sc_sq_cq))
|
|
goto errout;
|
|
newxprt->sc_rq_cq =
|
|
ib_alloc_cq_any(dev, newxprt, rq_depth, IB_POLL_WORKQUEUE);
|
|
if (IS_ERR(newxprt->sc_rq_cq))
|
|
goto errout;
|
|
|
|
memset(&qp_attr, 0, sizeof qp_attr);
|
|
qp_attr.event_handler = qp_event_handler;
|
|
qp_attr.qp_context = &newxprt->sc_xprt;
|
|
qp_attr.port_num = newxprt->sc_port_num;
|
|
qp_attr.cap.max_rdma_ctxs = ctxts;
|
|
qp_attr.cap.max_send_wr = newxprt->sc_sq_depth - ctxts;
|
|
qp_attr.cap.max_recv_wr = rq_depth;
|
|
qp_attr.cap.max_send_sge = newxprt->sc_max_send_sges;
|
|
qp_attr.cap.max_recv_sge = 1;
|
|
qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
|
|
qp_attr.qp_type = IB_QPT_RC;
|
|
qp_attr.send_cq = newxprt->sc_sq_cq;
|
|
qp_attr.recv_cq = newxprt->sc_rq_cq;
|
|
dprintk("svcrdma: newxprt->sc_cm_id=%p, newxprt->sc_pd=%p\n",
|
|
newxprt->sc_cm_id, newxprt->sc_pd);
|
|
dprintk(" cap.max_send_wr = %d, cap.max_recv_wr = %d\n",
|
|
qp_attr.cap.max_send_wr, qp_attr.cap.max_recv_wr);
|
|
dprintk(" cap.max_send_sge = %d, cap.max_recv_sge = %d\n",
|
|
qp_attr.cap.max_send_sge, qp_attr.cap.max_recv_sge);
|
|
|
|
ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, &qp_attr);
|
|
if (ret) {
|
|
trace_svcrdma_qp_err(newxprt, ret);
|
|
goto errout;
|
|
}
|
|
newxprt->sc_qp = newxprt->sc_cm_id->qp;
|
|
|
|
if (!(dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))
|
|
newxprt->sc_snd_w_inv = false;
|
|
if (!rdma_protocol_iwarp(dev, newxprt->sc_port_num) &&
|
|
!rdma_ib_or_roce(dev, newxprt->sc_port_num)) {
|
|
trace_svcrdma_fabric_err(newxprt, -EINVAL);
|
|
goto errout;
|
|
}
|
|
|
|
if (!svc_rdma_post_recvs(newxprt))
|
|
goto errout;
|
|
|
|
/* Swap out the handler */
|
|
newxprt->sc_cm_id->event_handler = svc_rdma_cma_handler;
|
|
|
|
/* Construct RDMA-CM private message */
|
|
pmsg.cp_magic = rpcrdma_cmp_magic;
|
|
pmsg.cp_version = RPCRDMA_CMP_VERSION;
|
|
pmsg.cp_flags = 0;
|
|
pmsg.cp_send_size = pmsg.cp_recv_size =
|
|
rpcrdma_encode_buffer_size(newxprt->sc_max_req_size);
|
|
|
|
/* Accept Connection */
|
|
set_bit(RDMAXPRT_CONN_PENDING, &newxprt->sc_flags);
|
|
memset(&conn_param, 0, sizeof conn_param);
|
|
conn_param.responder_resources = 0;
|
|
conn_param.initiator_depth = min_t(int, newxprt->sc_ord,
|
|
dev->attrs.max_qp_init_rd_atom);
|
|
if (!conn_param.initiator_depth) {
|
|
ret = -EINVAL;
|
|
trace_svcrdma_initdepth_err(newxprt, ret);
|
|
goto errout;
|
|
}
|
|
conn_param.private_data = &pmsg;
|
|
conn_param.private_data_len = sizeof(pmsg);
|
|
ret = rdma_accept(newxprt->sc_cm_id, &conn_param);
|
|
if (ret) {
|
|
trace_svcrdma_accept_err(newxprt, ret);
|
|
goto errout;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
|
dprintk("svcrdma: new connection %p accepted:\n", newxprt);
|
|
sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr;
|
|
dprintk(" local address : %pIS:%u\n", sap, rpc_get_port(sap));
|
|
sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr;
|
|
dprintk(" remote address : %pIS:%u\n", sap, rpc_get_port(sap));
|
|
dprintk(" max_sge : %d\n", newxprt->sc_max_send_sges);
|
|
dprintk(" sq_depth : %d\n", newxprt->sc_sq_depth);
|
|
dprintk(" rdma_rw_ctxs : %d\n", ctxts);
|
|
dprintk(" max_requests : %d\n", newxprt->sc_max_requests);
|
|
dprintk(" ord : %d\n", conn_param.initiator_depth);
|
|
#endif
|
|
|
|
return &newxprt->sc_xprt;
|
|
|
|
errout:
|
|
/* Take a reference in case the DTO handler runs */
|
|
svc_xprt_get(&newxprt->sc_xprt);
|
|
if (newxprt->sc_qp && !IS_ERR(newxprt->sc_qp))
|
|
ib_destroy_qp(newxprt->sc_qp);
|
|
rdma_destroy_id(newxprt->sc_cm_id);
|
|
/* This call to put will destroy the transport */
|
|
svc_xprt_put(&newxprt->sc_xprt);
|
|
return NULL;
|
|
}
|
|
|
|
static void svc_rdma_detach(struct svc_xprt *xprt)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
|
|
rdma_disconnect(rdma->sc_cm_id);
|
|
}
|
|
|
|
static void __svc_rdma_free(struct work_struct *work)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(work, struct svcxprt_rdma, sc_work);
|
|
struct svc_xprt *xprt = &rdma->sc_xprt;
|
|
|
|
/* This blocks until the Completion Queues are empty */
|
|
if (rdma->sc_qp && !IS_ERR(rdma->sc_qp))
|
|
ib_drain_qp(rdma->sc_qp);
|
|
|
|
svc_rdma_flush_recv_queues(rdma);
|
|
|
|
/* Final put of backchannel client transport */
|
|
if (xprt->xpt_bc_xprt) {
|
|
xprt_put(xprt->xpt_bc_xprt);
|
|
xprt->xpt_bc_xprt = NULL;
|
|
}
|
|
|
|
svc_rdma_destroy_rw_ctxts(rdma);
|
|
svc_rdma_send_ctxts_destroy(rdma);
|
|
svc_rdma_recv_ctxts_destroy(rdma);
|
|
|
|
/* Destroy the QP if present (not a listener) */
|
|
if (rdma->sc_qp && !IS_ERR(rdma->sc_qp))
|
|
ib_destroy_qp(rdma->sc_qp);
|
|
|
|
if (rdma->sc_sq_cq && !IS_ERR(rdma->sc_sq_cq))
|
|
ib_free_cq(rdma->sc_sq_cq);
|
|
|
|
if (rdma->sc_rq_cq && !IS_ERR(rdma->sc_rq_cq))
|
|
ib_free_cq(rdma->sc_rq_cq);
|
|
|
|
if (rdma->sc_pd && !IS_ERR(rdma->sc_pd))
|
|
ib_dealloc_pd(rdma->sc_pd);
|
|
|
|
/* Destroy the CM ID */
|
|
rdma_destroy_id(rdma->sc_cm_id);
|
|
|
|
kfree(rdma);
|
|
}
|
|
|
|
static void svc_rdma_free(struct svc_xprt *xprt)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
|
|
INIT_WORK(&rdma->sc_work, __svc_rdma_free);
|
|
schedule_work(&rdma->sc_work);
|
|
}
|
|
|
|
static int svc_rdma_has_wspace(struct svc_xprt *xprt)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
|
|
/*
|
|
* If there are already waiters on the SQ,
|
|
* return false.
|
|
*/
|
|
if (waitqueue_active(&rdma->sc_send_wait))
|
|
return 0;
|
|
|
|
/* Otherwise return true. */
|
|
return 1;
|
|
}
|
|
|
|
static void svc_rdma_secure_port(struct svc_rqst *rqstp)
|
|
{
|
|
set_bit(RQ_SECURE, &rqstp->rq_flags);
|
|
}
|
|
|
|
static void svc_rdma_kill_temp_xprt(struct svc_xprt *xprt)
|
|
{
|
|
}
|