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610 lines
19 KiB
610 lines
19 KiB
// 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 <[email protected]> |
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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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|
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#include "xprt_rdma.h" |
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#include <trace/events/rpcrdma.h> |
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|
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#define RPCDBG_FACILITY RPCDBG_SVCXPRT |
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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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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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|
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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_result_payload = svc_rdma_result_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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|
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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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svc_xprt_deferred_close(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_llist_head(&cma_xprt->sc_send_ctxts); |
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init_llist_head(&cma_xprt->sc_recv_ctxts); |
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init_llist_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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|
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/* Handle any requests that were received while |
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* CONN_PENDING was set. */ |
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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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svc_xprt_deferred_close(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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|
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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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|
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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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/* |
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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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|
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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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/* |
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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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|
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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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|
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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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|
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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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newxprt->sc_recv_batch = RPCRDMA_MAX_RECV_BATCH; |
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rq_depth = newxprt->sc_max_requests + newxprt->sc_max_bc_requests + |
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newxprt->sc_recv_batch; |
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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_recv_batch = 1; |
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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); |
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|
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newxprt->sc_pd = ib_alloc_pd(dev, 0); |
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if (IS_ERR(newxprt->sc_pd)) { |
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trace_svcrdma_pd_err(newxprt, PTR_ERR(newxprt->sc_pd)); |
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goto errout; |
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} |
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newxprt->sc_sq_cq = ib_alloc_cq_any(dev, newxprt, newxprt->sc_sq_depth, |
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IB_POLL_WORKQUEUE); |
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if (IS_ERR(newxprt->sc_sq_cq)) |
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goto errout; |
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newxprt->sc_rq_cq = |
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ib_alloc_cq_any(dev, newxprt, rq_depth, IB_POLL_WORKQUEUE); |
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if (IS_ERR(newxprt->sc_rq_cq)) |
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goto errout; |
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|
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memset(&qp_attr, 0, sizeof qp_attr); |
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qp_attr.event_handler = qp_event_handler; |
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qp_attr.qp_context = &newxprt->sc_xprt; |
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qp_attr.port_num = newxprt->sc_port_num; |
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qp_attr.cap.max_rdma_ctxs = ctxts; |
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qp_attr.cap.max_send_wr = newxprt->sc_sq_depth - ctxts; |
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qp_attr.cap.max_recv_wr = rq_depth; |
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qp_attr.cap.max_send_sge = newxprt->sc_max_send_sges; |
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qp_attr.cap.max_recv_sge = 1; |
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qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR; |
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qp_attr.qp_type = IB_QPT_RC; |
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qp_attr.send_cq = newxprt->sc_sq_cq; |
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qp_attr.recv_cq = newxprt->sc_rq_cq; |
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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; |
|
|
|
/* 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); |
|
rdma_lock_handler(newxprt->sc_cm_id); |
|
newxprt->sc_cm_id->event_handler = svc_rdma_cma_handler; |
|
ret = rdma_accept(newxprt->sc_cm_id, &conn_param); |
|
rdma_unlock_handler(newxprt->sc_cm_id); |
|
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); |
|
|
|
/* 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); |
|
|
|
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) |
|
{ |
|
}
|
|
|