4760 строки
123 KiB
C
4760 строки
123 KiB
C
/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
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* Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
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* Copyright (c) 2005-2006 Intel Corporation. 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
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* 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
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/completion.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/mutex.h>
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#include <linux/random.h>
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#include <linux/igmp.h>
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#include <linux/idr.h>
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#include <linux/inetdevice.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <net/route.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/tcp.h>
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#include <net/ipv6.h>
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#include <net/ip_fib.h>
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#include <net/ip6_route.h>
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#include <rdma/rdma_cm.h>
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#include <rdma/rdma_cm_ib.h>
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#include <rdma/rdma_netlink.h>
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#include <rdma/ib.h>
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#include <rdma/ib_cache.h>
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#include <rdma/ib_cm.h>
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#include <rdma/ib_sa.h>
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#include <rdma/iw_cm.h>
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#include "core_priv.h"
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#include "cma_priv.h"
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MODULE_AUTHOR("Sean Hefty");
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MODULE_DESCRIPTION("Generic RDMA CM Agent");
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MODULE_LICENSE("Dual BSD/GPL");
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#define CMA_CM_RESPONSE_TIMEOUT 20
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#define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
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#define CMA_MAX_CM_RETRIES 15
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#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
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#define CMA_IBOE_PACKET_LIFETIME 18
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#define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
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static const char * const cma_events[] = {
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[RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
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[RDMA_CM_EVENT_ADDR_ERROR] = "address error",
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[RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
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[RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
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[RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
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[RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
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[RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
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[RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
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[RDMA_CM_EVENT_REJECTED] = "rejected",
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[RDMA_CM_EVENT_ESTABLISHED] = "established",
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[RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
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[RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
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[RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
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[RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
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[RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
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[RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
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};
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const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
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{
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size_t index = event;
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return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
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cma_events[index] : "unrecognized event";
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}
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EXPORT_SYMBOL(rdma_event_msg);
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const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
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int reason)
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{
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if (rdma_ib_or_roce(id->device, id->port_num))
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return ibcm_reject_msg(reason);
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if (rdma_protocol_iwarp(id->device, id->port_num))
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return iwcm_reject_msg(reason);
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WARN_ON_ONCE(1);
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return "unrecognized transport";
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}
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EXPORT_SYMBOL(rdma_reject_msg);
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bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
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{
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if (rdma_ib_or_roce(id->device, id->port_num))
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return reason == IB_CM_REJ_CONSUMER_DEFINED;
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if (rdma_protocol_iwarp(id->device, id->port_num))
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return reason == -ECONNREFUSED;
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WARN_ON_ONCE(1);
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return false;
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}
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EXPORT_SYMBOL(rdma_is_consumer_reject);
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const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
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struct rdma_cm_event *ev, u8 *data_len)
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{
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const void *p;
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if (rdma_is_consumer_reject(id, ev->status)) {
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*data_len = ev->param.conn.private_data_len;
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p = ev->param.conn.private_data;
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} else {
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*data_len = 0;
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p = NULL;
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}
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return p;
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}
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EXPORT_SYMBOL(rdma_consumer_reject_data);
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/**
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* rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
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* @id: Communication Identifier
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*/
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struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
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{
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struct rdma_id_private *id_priv;
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id_priv = container_of(id, struct rdma_id_private, id);
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if (id->device->node_type == RDMA_NODE_RNIC)
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return id_priv->cm_id.iw;
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return NULL;
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}
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EXPORT_SYMBOL(rdma_iw_cm_id);
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/**
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* rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
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* @res: rdma resource tracking entry pointer
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*/
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struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
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{
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struct rdma_id_private *id_priv =
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container_of(res, struct rdma_id_private, res);
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return &id_priv->id;
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}
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EXPORT_SYMBOL(rdma_res_to_id);
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static void cma_add_one(struct ib_device *device);
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static void cma_remove_one(struct ib_device *device, void *client_data);
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static struct ib_client cma_client = {
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.name = "cma",
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.add = cma_add_one,
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.remove = cma_remove_one
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};
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static struct ib_sa_client sa_client;
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static LIST_HEAD(dev_list);
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static LIST_HEAD(listen_any_list);
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static DEFINE_MUTEX(lock);
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static struct workqueue_struct *cma_wq;
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static unsigned int cma_pernet_id;
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struct cma_pernet {
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struct idr tcp_ps;
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struct idr udp_ps;
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struct idr ipoib_ps;
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struct idr ib_ps;
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};
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static struct cma_pernet *cma_pernet(struct net *net)
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{
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return net_generic(net, cma_pernet_id);
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}
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static struct idr *cma_pernet_idr(struct net *net, enum rdma_ucm_port_space ps)
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{
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struct cma_pernet *pernet = cma_pernet(net);
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switch (ps) {
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case RDMA_PS_TCP:
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return &pernet->tcp_ps;
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case RDMA_PS_UDP:
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return &pernet->udp_ps;
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case RDMA_PS_IPOIB:
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return &pernet->ipoib_ps;
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case RDMA_PS_IB:
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return &pernet->ib_ps;
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default:
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return NULL;
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}
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}
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struct cma_device {
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struct list_head list;
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struct ib_device *device;
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struct completion comp;
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atomic_t refcount;
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struct list_head id_list;
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enum ib_gid_type *default_gid_type;
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u8 *default_roce_tos;
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};
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struct rdma_bind_list {
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enum rdma_ucm_port_space ps;
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struct hlist_head owners;
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unsigned short port;
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};
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struct class_port_info_context {
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struct ib_class_port_info *class_port_info;
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struct ib_device *device;
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struct completion done;
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struct ib_sa_query *sa_query;
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u8 port_num;
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};
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static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
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struct rdma_bind_list *bind_list, int snum)
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{
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struct idr *idr = cma_pernet_idr(net, ps);
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return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
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}
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static struct rdma_bind_list *cma_ps_find(struct net *net,
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enum rdma_ucm_port_space ps, int snum)
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{
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struct idr *idr = cma_pernet_idr(net, ps);
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return idr_find(idr, snum);
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}
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static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
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int snum)
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{
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struct idr *idr = cma_pernet_idr(net, ps);
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idr_remove(idr, snum);
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}
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enum {
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CMA_OPTION_AFONLY,
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};
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void cma_ref_dev(struct cma_device *cma_dev)
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{
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atomic_inc(&cma_dev->refcount);
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}
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struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
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void *cookie)
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{
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struct cma_device *cma_dev;
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struct cma_device *found_cma_dev = NULL;
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mutex_lock(&lock);
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list_for_each_entry(cma_dev, &dev_list, list)
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if (filter(cma_dev->device, cookie)) {
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found_cma_dev = cma_dev;
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break;
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}
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if (found_cma_dev)
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cma_ref_dev(found_cma_dev);
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mutex_unlock(&lock);
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return found_cma_dev;
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}
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int cma_get_default_gid_type(struct cma_device *cma_dev,
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unsigned int port)
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{
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if (!rdma_is_port_valid(cma_dev->device, port))
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return -EINVAL;
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return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
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}
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int cma_set_default_gid_type(struct cma_device *cma_dev,
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unsigned int port,
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enum ib_gid_type default_gid_type)
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{
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unsigned long supported_gids;
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if (!rdma_is_port_valid(cma_dev->device, port))
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return -EINVAL;
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supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
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if (!(supported_gids & 1 << default_gid_type))
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return -EINVAL;
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cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
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default_gid_type;
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return 0;
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}
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int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
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{
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if (!rdma_is_port_valid(cma_dev->device, port))
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return -EINVAL;
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return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
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}
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int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
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u8 default_roce_tos)
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{
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if (!rdma_is_port_valid(cma_dev->device, port))
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return -EINVAL;
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cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
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default_roce_tos;
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return 0;
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}
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struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
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{
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return cma_dev->device;
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}
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/*
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* Device removal can occur at anytime, so we need extra handling to
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* serialize notifying the user of device removal with other callbacks.
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* We do this by disabling removal notification while a callback is in process,
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* and reporting it after the callback completes.
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*/
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struct cma_multicast {
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struct rdma_id_private *id_priv;
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union {
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struct ib_sa_multicast *ib;
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} multicast;
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struct list_head list;
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void *context;
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struct sockaddr_storage addr;
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struct kref mcref;
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u8 join_state;
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};
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struct cma_work {
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struct work_struct work;
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struct rdma_id_private *id;
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enum rdma_cm_state old_state;
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enum rdma_cm_state new_state;
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struct rdma_cm_event event;
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};
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struct cma_ndev_work {
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struct work_struct work;
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struct rdma_id_private *id;
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struct rdma_cm_event event;
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};
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struct iboe_mcast_work {
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struct work_struct work;
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struct rdma_id_private *id;
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struct cma_multicast *mc;
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};
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union cma_ip_addr {
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struct in6_addr ip6;
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struct {
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__be32 pad[3];
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__be32 addr;
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} ip4;
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};
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struct cma_hdr {
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u8 cma_version;
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u8 ip_version; /* IP version: 7:4 */
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__be16 port;
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union cma_ip_addr src_addr;
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union cma_ip_addr dst_addr;
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};
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#define CMA_VERSION 0x00
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struct cma_req_info {
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struct sockaddr_storage listen_addr_storage;
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struct sockaddr_storage src_addr_storage;
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struct ib_device *device;
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union ib_gid local_gid;
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__be64 service_id;
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int port;
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bool has_gid;
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u16 pkey;
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};
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static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
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{
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&id_priv->lock, flags);
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ret = (id_priv->state == comp);
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return ret;
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}
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static int cma_comp_exch(struct rdma_id_private *id_priv,
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enum rdma_cm_state comp, enum rdma_cm_state exch)
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{
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&id_priv->lock, flags);
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if ((ret = (id_priv->state == comp)))
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id_priv->state = exch;
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return ret;
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}
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static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
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enum rdma_cm_state exch)
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{
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unsigned long flags;
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enum rdma_cm_state old;
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spin_lock_irqsave(&id_priv->lock, flags);
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old = id_priv->state;
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id_priv->state = exch;
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return old;
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}
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static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
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{
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return hdr->ip_version >> 4;
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}
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static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
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{
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hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
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}
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static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
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{
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struct in_device *in_dev = NULL;
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if (ndev) {
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rtnl_lock();
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in_dev = __in_dev_get_rtnl(ndev);
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if (in_dev) {
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if (join)
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ip_mc_inc_group(in_dev,
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*(__be32 *)(mgid->raw + 12));
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else
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ip_mc_dec_group(in_dev,
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*(__be32 *)(mgid->raw + 12));
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}
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rtnl_unlock();
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}
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return (in_dev) ? 0 : -ENODEV;
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}
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static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
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struct cma_device *cma_dev)
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{
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cma_ref_dev(cma_dev);
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id_priv->cma_dev = cma_dev;
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id_priv->id.device = cma_dev->device;
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id_priv->id.route.addr.dev_addr.transport =
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rdma_node_get_transport(cma_dev->device->node_type);
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list_add_tail(&id_priv->list, &cma_dev->id_list);
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rdma_restrack_add(&id_priv->res);
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}
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static void cma_attach_to_dev(struct rdma_id_private *id_priv,
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struct cma_device *cma_dev)
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{
|
|
_cma_attach_to_dev(id_priv, cma_dev);
|
|
id_priv->gid_type =
|
|
cma_dev->default_gid_type[id_priv->id.port_num -
|
|
rdma_start_port(cma_dev->device)];
|
|
}
|
|
|
|
void cma_deref_dev(struct cma_device *cma_dev)
|
|
{
|
|
if (atomic_dec_and_test(&cma_dev->refcount))
|
|
complete(&cma_dev->comp);
|
|
}
|
|
|
|
static inline void release_mc(struct kref *kref)
|
|
{
|
|
struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
|
|
|
|
kfree(mc->multicast.ib);
|
|
kfree(mc);
|
|
}
|
|
|
|
static void cma_release_dev(struct rdma_id_private *id_priv)
|
|
{
|
|
mutex_lock(&lock);
|
|
list_del(&id_priv->list);
|
|
cma_deref_dev(id_priv->cma_dev);
|
|
id_priv->cma_dev = NULL;
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
|
|
{
|
|
return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
|
|
}
|
|
|
|
static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
|
|
{
|
|
return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
|
|
}
|
|
|
|
static inline unsigned short cma_family(struct rdma_id_private *id_priv)
|
|
{
|
|
return id_priv->id.route.addr.src_addr.ss_family;
|
|
}
|
|
|
|
static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
|
|
{
|
|
struct ib_sa_mcmember_rec rec;
|
|
int ret = 0;
|
|
|
|
if (id_priv->qkey) {
|
|
if (qkey && id_priv->qkey != qkey)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
if (qkey) {
|
|
id_priv->qkey = qkey;
|
|
return 0;
|
|
}
|
|
|
|
switch (id_priv->id.ps) {
|
|
case RDMA_PS_UDP:
|
|
case RDMA_PS_IB:
|
|
id_priv->qkey = RDMA_UDP_QKEY;
|
|
break;
|
|
case RDMA_PS_IPOIB:
|
|
ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
|
|
ret = ib_sa_get_mcmember_rec(id_priv->id.device,
|
|
id_priv->id.port_num, &rec.mgid,
|
|
&rec);
|
|
if (!ret)
|
|
id_priv->qkey = be32_to_cpu(rec.qkey);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
|
|
{
|
|
dev_addr->dev_type = ARPHRD_INFINIBAND;
|
|
rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
|
|
ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
|
|
}
|
|
|
|
static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
|
|
{
|
|
int ret;
|
|
|
|
if (addr->sa_family != AF_IB) {
|
|
ret = rdma_translate_ip(addr, dev_addr);
|
|
} else {
|
|
cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct ib_gid_attr *
|
|
cma_validate_port(struct ib_device *device, u8 port,
|
|
enum ib_gid_type gid_type,
|
|
union ib_gid *gid,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
int bound_if_index = dev_addr->bound_dev_if;
|
|
const struct ib_gid_attr *sgid_attr;
|
|
int dev_type = dev_addr->dev_type;
|
|
struct net_device *ndev = NULL;
|
|
|
|
if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
|
|
ndev = dev_get_by_index(dev_addr->net, bound_if_index);
|
|
if (!ndev)
|
|
return ERR_PTR(-ENODEV);
|
|
} else {
|
|
gid_type = IB_GID_TYPE_IB;
|
|
}
|
|
|
|
sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
|
|
if (ndev)
|
|
dev_put(ndev);
|
|
return sgid_attr;
|
|
}
|
|
|
|
static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
|
|
const struct ib_gid_attr *sgid_attr)
|
|
{
|
|
WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
|
|
id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
|
|
}
|
|
|
|
/**
|
|
* cma_acquire_dev_by_src_ip - Acquire cma device, port, gid attribute
|
|
* based on source ip address.
|
|
* @id_priv: cm_id which should be bound to cma device
|
|
*
|
|
* cma_acquire_dev_by_src_ip() binds cm id to cma device, port and GID attribute
|
|
* based on source IP address. It returns 0 on success or error code otherwise.
|
|
* It is applicable to active and passive side cm_id.
|
|
*/
|
|
static int cma_acquire_dev_by_src_ip(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
const struct ib_gid_attr *sgid_attr;
|
|
union ib_gid gid, iboe_gid, *gidp;
|
|
struct cma_device *cma_dev;
|
|
enum ib_gid_type gid_type;
|
|
int ret = -ENODEV;
|
|
u8 port;
|
|
|
|
if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
|
|
id_priv->id.ps == RDMA_PS_IPOIB)
|
|
return -EINVAL;
|
|
|
|
rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
|
|
&iboe_gid);
|
|
|
|
memcpy(&gid, dev_addr->src_dev_addr +
|
|
rdma_addr_gid_offset(dev_addr), sizeof(gid));
|
|
|
|
mutex_lock(&lock);
|
|
list_for_each_entry(cma_dev, &dev_list, list) {
|
|
for (port = rdma_start_port(cma_dev->device);
|
|
port <= rdma_end_port(cma_dev->device); port++) {
|
|
gidp = rdma_protocol_roce(cma_dev->device, port) ?
|
|
&iboe_gid : &gid;
|
|
gid_type = cma_dev->default_gid_type[port - 1];
|
|
sgid_attr = cma_validate_port(cma_dev->device, port,
|
|
gid_type, gidp, id_priv);
|
|
if (!IS_ERR(sgid_attr)) {
|
|
id_priv->id.port_num = port;
|
|
cma_bind_sgid_attr(id_priv, sgid_attr);
|
|
cma_attach_to_dev(id_priv, cma_dev);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* cma_ib_acquire_dev - Acquire cma device, port and SGID attribute
|
|
* @id_priv: cm id to bind to cma device
|
|
* @listen_id_priv: listener cm id to match against
|
|
* @req: Pointer to req structure containaining incoming
|
|
* request information
|
|
* cma_ib_acquire_dev() acquires cma device, port and SGID attribute when
|
|
* rdma device matches for listen_id and incoming request. It also verifies
|
|
* that a GID table entry is present for the source address.
|
|
* Returns 0 on success, or returns error code otherwise.
|
|
*/
|
|
static int cma_ib_acquire_dev(struct rdma_id_private *id_priv,
|
|
const struct rdma_id_private *listen_id_priv,
|
|
struct cma_req_info *req)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
const struct ib_gid_attr *sgid_attr;
|
|
enum ib_gid_type gid_type;
|
|
union ib_gid gid;
|
|
|
|
if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
|
|
id_priv->id.ps == RDMA_PS_IPOIB)
|
|
return -EINVAL;
|
|
|
|
if (rdma_protocol_roce(req->device, req->port))
|
|
rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
|
|
&gid);
|
|
else
|
|
memcpy(&gid, dev_addr->src_dev_addr +
|
|
rdma_addr_gid_offset(dev_addr), sizeof(gid));
|
|
|
|
gid_type = listen_id_priv->cma_dev->default_gid_type[req->port - 1];
|
|
sgid_attr = cma_validate_port(req->device, req->port,
|
|
gid_type, &gid, id_priv);
|
|
if (IS_ERR(sgid_attr))
|
|
return PTR_ERR(sgid_attr);
|
|
|
|
id_priv->id.port_num = req->port;
|
|
cma_bind_sgid_attr(id_priv, sgid_attr);
|
|
/* Need to acquire lock to protect against reader
|
|
* of cma_dev->id_list such as cma_netdev_callback() and
|
|
* cma_process_remove().
|
|
*/
|
|
mutex_lock(&lock);
|
|
cma_attach_to_dev(id_priv, listen_id_priv->cma_dev);
|
|
mutex_unlock(&lock);
|
|
return 0;
|
|
}
|
|
|
|
static int cma_iw_acquire_dev(struct rdma_id_private *id_priv,
|
|
const struct rdma_id_private *listen_id_priv)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
const struct ib_gid_attr *sgid_attr;
|
|
struct cma_device *cma_dev;
|
|
enum ib_gid_type gid_type;
|
|
int ret = -ENODEV;
|
|
union ib_gid gid;
|
|
u8 port;
|
|
|
|
if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
|
|
id_priv->id.ps == RDMA_PS_IPOIB)
|
|
return -EINVAL;
|
|
|
|
memcpy(&gid, dev_addr->src_dev_addr +
|
|
rdma_addr_gid_offset(dev_addr), sizeof(gid));
|
|
|
|
mutex_lock(&lock);
|
|
|
|
cma_dev = listen_id_priv->cma_dev;
|
|
port = listen_id_priv->id.port_num;
|
|
gid_type = listen_id_priv->gid_type;
|
|
sgid_attr = cma_validate_port(cma_dev->device, port,
|
|
gid_type, &gid, id_priv);
|
|
if (!IS_ERR(sgid_attr)) {
|
|
id_priv->id.port_num = port;
|
|
cma_bind_sgid_attr(id_priv, sgid_attr);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
list_for_each_entry(cma_dev, &dev_list, list) {
|
|
for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
|
|
if (listen_id_priv->cma_dev == cma_dev &&
|
|
listen_id_priv->id.port_num == port)
|
|
continue;
|
|
|
|
gid_type = cma_dev->default_gid_type[port - 1];
|
|
sgid_attr = cma_validate_port(cma_dev->device, port,
|
|
gid_type, &gid, id_priv);
|
|
if (!IS_ERR(sgid_attr)) {
|
|
id_priv->id.port_num = port;
|
|
cma_bind_sgid_attr(id_priv, sgid_attr);
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (!ret)
|
|
cma_attach_to_dev(id_priv, cma_dev);
|
|
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Select the source IB device and address to reach the destination IB address.
|
|
*/
|
|
static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_device *cma_dev, *cur_dev;
|
|
struct sockaddr_ib *addr;
|
|
union ib_gid gid, sgid, *dgid;
|
|
u16 pkey, index;
|
|
u8 p;
|
|
enum ib_port_state port_state;
|
|
int i;
|
|
|
|
cma_dev = NULL;
|
|
addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
|
|
dgid = (union ib_gid *) &addr->sib_addr;
|
|
pkey = ntohs(addr->sib_pkey);
|
|
|
|
mutex_lock(&lock);
|
|
list_for_each_entry(cur_dev, &dev_list, list) {
|
|
for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
|
|
if (!rdma_cap_af_ib(cur_dev->device, p))
|
|
continue;
|
|
|
|
if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
|
|
continue;
|
|
|
|
if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
|
|
continue;
|
|
for (i = 0; !rdma_query_gid(cur_dev->device,
|
|
p, i, &gid);
|
|
i++) {
|
|
if (!memcmp(&gid, dgid, sizeof(gid))) {
|
|
cma_dev = cur_dev;
|
|
sgid = gid;
|
|
id_priv->id.port_num = p;
|
|
goto found;
|
|
}
|
|
|
|
if (!cma_dev && (gid.global.subnet_prefix ==
|
|
dgid->global.subnet_prefix) &&
|
|
port_state == IB_PORT_ACTIVE) {
|
|
cma_dev = cur_dev;
|
|
sgid = gid;
|
|
id_priv->id.port_num = p;
|
|
goto found;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&lock);
|
|
return -ENODEV;
|
|
|
|
found:
|
|
cma_attach_to_dev(id_priv, cma_dev);
|
|
mutex_unlock(&lock);
|
|
addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
|
|
memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
|
|
cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
|
|
return 0;
|
|
}
|
|
|
|
static void cma_deref_id(struct rdma_id_private *id_priv)
|
|
{
|
|
if (atomic_dec_and_test(&id_priv->refcount))
|
|
complete(&id_priv->comp);
|
|
}
|
|
|
|
struct rdma_cm_id *__rdma_create_id(struct net *net,
|
|
rdma_cm_event_handler event_handler,
|
|
void *context, enum rdma_ucm_port_space ps,
|
|
enum ib_qp_type qp_type, const char *caller)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
|
|
id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
|
|
if (!id_priv)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
rdma_restrack_set_task(&id_priv->res, caller);
|
|
id_priv->res.type = RDMA_RESTRACK_CM_ID;
|
|
id_priv->state = RDMA_CM_IDLE;
|
|
id_priv->id.context = context;
|
|
id_priv->id.event_handler = event_handler;
|
|
id_priv->id.ps = ps;
|
|
id_priv->id.qp_type = qp_type;
|
|
id_priv->tos_set = false;
|
|
id_priv->gid_type = IB_GID_TYPE_IB;
|
|
spin_lock_init(&id_priv->lock);
|
|
mutex_init(&id_priv->qp_mutex);
|
|
init_completion(&id_priv->comp);
|
|
atomic_set(&id_priv->refcount, 1);
|
|
mutex_init(&id_priv->handler_mutex);
|
|
INIT_LIST_HEAD(&id_priv->listen_list);
|
|
INIT_LIST_HEAD(&id_priv->mc_list);
|
|
get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
|
|
id_priv->id.route.addr.dev_addr.net = get_net(net);
|
|
id_priv->seq_num &= 0x00ffffff;
|
|
|
|
return &id_priv->id;
|
|
}
|
|
EXPORT_SYMBOL(__rdma_create_id);
|
|
|
|
static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_INIT;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_RTR;
|
|
ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_RTS;
|
|
qp_attr.sq_psn = 0;
|
|
ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_INIT;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
|
|
}
|
|
|
|
int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
|
|
struct ib_qp_init_attr *qp_init_attr)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct ib_qp *qp;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (id->device != pd->device)
|
|
return -EINVAL;
|
|
|
|
qp_init_attr->port_num = id->port_num;
|
|
qp = ib_create_qp(pd, qp_init_attr);
|
|
if (IS_ERR(qp))
|
|
return PTR_ERR(qp);
|
|
|
|
if (id->qp_type == IB_QPT_UD)
|
|
ret = cma_init_ud_qp(id_priv, qp);
|
|
else
|
|
ret = cma_init_conn_qp(id_priv, qp);
|
|
if (ret)
|
|
goto err;
|
|
|
|
id->qp = qp;
|
|
id_priv->qp_num = qp->qp_num;
|
|
id_priv->srq = (qp->srq != NULL);
|
|
return 0;
|
|
err:
|
|
ib_destroy_qp(qp);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_create_qp);
|
|
|
|
void rdma_destroy_qp(struct rdma_cm_id *id)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
ib_destroy_qp(id_priv->id.qp);
|
|
id_priv->id.qp = NULL;
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
}
|
|
EXPORT_SYMBOL(rdma_destroy_qp);
|
|
|
|
static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!id_priv->id.qp) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
/* Need to update QP attributes from default values. */
|
|
qp_attr.qp_state = IB_QPS_INIT;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
qp_attr.qp_state = IB_QPS_RTR;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
|
|
|
|
if (conn_param)
|
|
qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
|
|
out:
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!id_priv->id.qp) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
qp_attr.qp_state = IB_QPS_RTS;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (conn_param)
|
|
qp_attr.max_rd_atomic = conn_param->initiator_depth;
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
|
|
out:
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_modify_qp_err(struct rdma_id_private *id_priv)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int ret;
|
|
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!id_priv->id.qp) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
qp_attr.qp_state = IB_QPS_ERR;
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
|
|
out:
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
|
|
struct ib_qp_attr *qp_attr, int *qp_attr_mask)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
int ret;
|
|
u16 pkey;
|
|
|
|
if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
|
|
pkey = 0xffff;
|
|
else
|
|
pkey = ib_addr_get_pkey(dev_addr);
|
|
|
|
ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
|
|
pkey, &qp_attr->pkey_index);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr->port_num = id_priv->id.port_num;
|
|
*qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
|
|
|
|
if (id_priv->id.qp_type == IB_QPT_UD) {
|
|
ret = cma_set_qkey(id_priv, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr->qkey = id_priv->qkey;
|
|
*qp_attr_mask |= IB_QP_QKEY;
|
|
} else {
|
|
qp_attr->qp_access_flags = 0;
|
|
*qp_attr_mask |= IB_QP_ACCESS_FLAGS;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret = 0;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (rdma_cap_ib_cm(id->device, id->port_num)) {
|
|
if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
|
|
ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
|
|
else
|
|
ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
|
|
qp_attr_mask);
|
|
|
|
if (qp_attr->qp_state == IB_QPS_RTR)
|
|
qp_attr->rq_psn = id_priv->seq_num;
|
|
} else if (rdma_cap_iw_cm(id->device, id->port_num)) {
|
|
if (!id_priv->cm_id.iw) {
|
|
qp_attr->qp_access_flags = 0;
|
|
*qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
|
|
} else
|
|
ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
|
|
qp_attr_mask);
|
|
qp_attr->port_num = id_priv->id.port_num;
|
|
*qp_attr_mask |= IB_QP_PORT;
|
|
} else
|
|
ret = -ENOSYS;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_init_qp_attr);
|
|
|
|
static inline bool cma_zero_addr(const struct sockaddr *addr)
|
|
{
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
|
|
case AF_INET6:
|
|
return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
|
|
case AF_IB:
|
|
return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static inline bool cma_loopback_addr(const struct sockaddr *addr)
|
|
{
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
return ipv4_is_loopback(
|
|
((struct sockaddr_in *)addr)->sin_addr.s_addr);
|
|
case AF_INET6:
|
|
return ipv6_addr_loopback(
|
|
&((struct sockaddr_in6 *)addr)->sin6_addr);
|
|
case AF_IB:
|
|
return ib_addr_loopback(
|
|
&((struct sockaddr_ib *)addr)->sib_addr);
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static inline bool cma_any_addr(const struct sockaddr *addr)
|
|
{
|
|
return cma_zero_addr(addr) || cma_loopback_addr(addr);
|
|
}
|
|
|
|
static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
|
|
{
|
|
if (src->sa_family != dst->sa_family)
|
|
return -1;
|
|
|
|
switch (src->sa_family) {
|
|
case AF_INET:
|
|
return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
|
|
((struct sockaddr_in *) dst)->sin_addr.s_addr;
|
|
case AF_INET6:
|
|
return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
|
|
&((struct sockaddr_in6 *) dst)->sin6_addr);
|
|
default:
|
|
return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
|
|
&((struct sockaddr_ib *) dst)->sib_addr);
|
|
}
|
|
}
|
|
|
|
static __be16 cma_port(const struct sockaddr *addr)
|
|
{
|
|
struct sockaddr_ib *sib;
|
|
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
return ((struct sockaddr_in *) addr)->sin_port;
|
|
case AF_INET6:
|
|
return ((struct sockaddr_in6 *) addr)->sin6_port;
|
|
case AF_IB:
|
|
sib = (struct sockaddr_ib *) addr;
|
|
return htons((u16) (be64_to_cpu(sib->sib_sid) &
|
|
be64_to_cpu(sib->sib_sid_mask)));
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static inline int cma_any_port(const struct sockaddr *addr)
|
|
{
|
|
return !cma_port(addr);
|
|
}
|
|
|
|
static void cma_save_ib_info(struct sockaddr *src_addr,
|
|
struct sockaddr *dst_addr,
|
|
const struct rdma_cm_id *listen_id,
|
|
const struct sa_path_rec *path)
|
|
{
|
|
struct sockaddr_ib *listen_ib, *ib;
|
|
|
|
listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
|
|
if (src_addr) {
|
|
ib = (struct sockaddr_ib *)src_addr;
|
|
ib->sib_family = AF_IB;
|
|
if (path) {
|
|
ib->sib_pkey = path->pkey;
|
|
ib->sib_flowinfo = path->flow_label;
|
|
memcpy(&ib->sib_addr, &path->sgid, 16);
|
|
ib->sib_sid = path->service_id;
|
|
ib->sib_scope_id = 0;
|
|
} else {
|
|
ib->sib_pkey = listen_ib->sib_pkey;
|
|
ib->sib_flowinfo = listen_ib->sib_flowinfo;
|
|
ib->sib_addr = listen_ib->sib_addr;
|
|
ib->sib_sid = listen_ib->sib_sid;
|
|
ib->sib_scope_id = listen_ib->sib_scope_id;
|
|
}
|
|
ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
|
|
}
|
|
if (dst_addr) {
|
|
ib = (struct sockaddr_ib *)dst_addr;
|
|
ib->sib_family = AF_IB;
|
|
if (path) {
|
|
ib->sib_pkey = path->pkey;
|
|
ib->sib_flowinfo = path->flow_label;
|
|
memcpy(&ib->sib_addr, &path->dgid, 16);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void cma_save_ip4_info(struct sockaddr_in *src_addr,
|
|
struct sockaddr_in *dst_addr,
|
|
struct cma_hdr *hdr,
|
|
__be16 local_port)
|
|
{
|
|
if (src_addr) {
|
|
*src_addr = (struct sockaddr_in) {
|
|
.sin_family = AF_INET,
|
|
.sin_addr.s_addr = hdr->dst_addr.ip4.addr,
|
|
.sin_port = local_port,
|
|
};
|
|
}
|
|
|
|
if (dst_addr) {
|
|
*dst_addr = (struct sockaddr_in) {
|
|
.sin_family = AF_INET,
|
|
.sin_addr.s_addr = hdr->src_addr.ip4.addr,
|
|
.sin_port = hdr->port,
|
|
};
|
|
}
|
|
}
|
|
|
|
static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
|
|
struct sockaddr_in6 *dst_addr,
|
|
struct cma_hdr *hdr,
|
|
__be16 local_port)
|
|
{
|
|
if (src_addr) {
|
|
*src_addr = (struct sockaddr_in6) {
|
|
.sin6_family = AF_INET6,
|
|
.sin6_addr = hdr->dst_addr.ip6,
|
|
.sin6_port = local_port,
|
|
};
|
|
}
|
|
|
|
if (dst_addr) {
|
|
*dst_addr = (struct sockaddr_in6) {
|
|
.sin6_family = AF_INET6,
|
|
.sin6_addr = hdr->src_addr.ip6,
|
|
.sin6_port = hdr->port,
|
|
};
|
|
}
|
|
}
|
|
|
|
static u16 cma_port_from_service_id(__be64 service_id)
|
|
{
|
|
return (u16)be64_to_cpu(service_id);
|
|
}
|
|
|
|
static int cma_save_ip_info(struct sockaddr *src_addr,
|
|
struct sockaddr *dst_addr,
|
|
const struct ib_cm_event *ib_event,
|
|
__be64 service_id)
|
|
{
|
|
struct cma_hdr *hdr;
|
|
__be16 port;
|
|
|
|
hdr = ib_event->private_data;
|
|
if (hdr->cma_version != CMA_VERSION)
|
|
return -EINVAL;
|
|
|
|
port = htons(cma_port_from_service_id(service_id));
|
|
|
|
switch (cma_get_ip_ver(hdr)) {
|
|
case 4:
|
|
cma_save_ip4_info((struct sockaddr_in *)src_addr,
|
|
(struct sockaddr_in *)dst_addr, hdr, port);
|
|
break;
|
|
case 6:
|
|
cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
|
|
(struct sockaddr_in6 *)dst_addr, hdr, port);
|
|
break;
|
|
default:
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cma_save_net_info(struct sockaddr *src_addr,
|
|
struct sockaddr *dst_addr,
|
|
const struct rdma_cm_id *listen_id,
|
|
const struct ib_cm_event *ib_event,
|
|
sa_family_t sa_family, __be64 service_id)
|
|
{
|
|
if (sa_family == AF_IB) {
|
|
if (ib_event->event == IB_CM_REQ_RECEIVED)
|
|
cma_save_ib_info(src_addr, dst_addr, listen_id,
|
|
ib_event->param.req_rcvd.primary_path);
|
|
else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
|
|
cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
|
|
return 0;
|
|
}
|
|
|
|
return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
|
|
}
|
|
|
|
static int cma_save_req_info(const struct ib_cm_event *ib_event,
|
|
struct cma_req_info *req)
|
|
{
|
|
const struct ib_cm_req_event_param *req_param =
|
|
&ib_event->param.req_rcvd;
|
|
const struct ib_cm_sidr_req_event_param *sidr_param =
|
|
&ib_event->param.sidr_req_rcvd;
|
|
|
|
switch (ib_event->event) {
|
|
case IB_CM_REQ_RECEIVED:
|
|
req->device = req_param->listen_id->device;
|
|
req->port = req_param->port;
|
|
memcpy(&req->local_gid, &req_param->primary_path->sgid,
|
|
sizeof(req->local_gid));
|
|
req->has_gid = true;
|
|
req->service_id = req_param->primary_path->service_id;
|
|
req->pkey = be16_to_cpu(req_param->primary_path->pkey);
|
|
if (req->pkey != req_param->bth_pkey)
|
|
pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
|
|
"RDMA CMA: in the future this may cause the request to be dropped\n",
|
|
req_param->bth_pkey, req->pkey);
|
|
break;
|
|
case IB_CM_SIDR_REQ_RECEIVED:
|
|
req->device = sidr_param->listen_id->device;
|
|
req->port = sidr_param->port;
|
|
req->has_gid = false;
|
|
req->service_id = sidr_param->service_id;
|
|
req->pkey = sidr_param->pkey;
|
|
if (req->pkey != sidr_param->bth_pkey)
|
|
pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
|
|
"RDMA CMA: in the future this may cause the request to be dropped\n",
|
|
sidr_param->bth_pkey, req->pkey);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool validate_ipv4_net_dev(struct net_device *net_dev,
|
|
const struct sockaddr_in *dst_addr,
|
|
const struct sockaddr_in *src_addr)
|
|
{
|
|
__be32 daddr = dst_addr->sin_addr.s_addr,
|
|
saddr = src_addr->sin_addr.s_addr;
|
|
struct fib_result res;
|
|
struct flowi4 fl4;
|
|
int err;
|
|
bool ret;
|
|
|
|
if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
|
|
ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
|
|
ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
|
|
ipv4_is_loopback(saddr))
|
|
return false;
|
|
|
|
memset(&fl4, 0, sizeof(fl4));
|
|
fl4.flowi4_iif = net_dev->ifindex;
|
|
fl4.daddr = daddr;
|
|
fl4.saddr = saddr;
|
|
|
|
rcu_read_lock();
|
|
err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
|
|
ret = err == 0 && FIB_RES_DEV(res) == net_dev;
|
|
rcu_read_unlock();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool validate_ipv6_net_dev(struct net_device *net_dev,
|
|
const struct sockaddr_in6 *dst_addr,
|
|
const struct sockaddr_in6 *src_addr)
|
|
{
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
|
|
IPV6_ADDR_LINKLOCAL;
|
|
struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
|
|
&src_addr->sin6_addr, net_dev->ifindex,
|
|
NULL, strict);
|
|
bool ret;
|
|
|
|
if (!rt)
|
|
return false;
|
|
|
|
ret = rt->rt6i_idev->dev == net_dev;
|
|
ip6_rt_put(rt);
|
|
|
|
return ret;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
static bool validate_net_dev(struct net_device *net_dev,
|
|
const struct sockaddr *daddr,
|
|
const struct sockaddr *saddr)
|
|
{
|
|
const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
|
|
const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
|
|
const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
|
|
const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
|
|
|
|
switch (daddr->sa_family) {
|
|
case AF_INET:
|
|
return saddr->sa_family == AF_INET &&
|
|
validate_ipv4_net_dev(net_dev, daddr4, saddr4);
|
|
|
|
case AF_INET6:
|
|
return saddr->sa_family == AF_INET6 &&
|
|
validate_ipv6_net_dev(net_dev, daddr6, saddr6);
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static struct net_device *
|
|
roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
|
|
{
|
|
const struct ib_gid_attr *sgid_attr = NULL;
|
|
|
|
if (ib_event->event == IB_CM_REQ_RECEIVED)
|
|
sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
|
|
else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
|
|
sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
|
|
|
|
if (!sgid_attr)
|
|
return NULL;
|
|
dev_hold(sgid_attr->ndev);
|
|
return sgid_attr->ndev;
|
|
}
|
|
|
|
static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
|
|
struct cma_req_info *req)
|
|
{
|
|
struct sockaddr *listen_addr =
|
|
(struct sockaddr *)&req->listen_addr_storage;
|
|
struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
|
|
struct net_device *net_dev;
|
|
const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
|
|
int err;
|
|
|
|
err = cma_save_ip_info(listen_addr, src_addr, ib_event,
|
|
req->service_id);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
if (rdma_protocol_roce(req->device, req->port))
|
|
net_dev = roce_get_net_dev_by_cm_event(ib_event);
|
|
else
|
|
net_dev = ib_get_net_dev_by_params(req->device, req->port,
|
|
req->pkey,
|
|
gid, listen_addr);
|
|
if (!net_dev)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
return net_dev;
|
|
}
|
|
|
|
static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
|
|
{
|
|
return (be64_to_cpu(service_id) >> 16) & 0xffff;
|
|
}
|
|
|
|
static bool cma_match_private_data(struct rdma_id_private *id_priv,
|
|
const struct cma_hdr *hdr)
|
|
{
|
|
struct sockaddr *addr = cma_src_addr(id_priv);
|
|
__be32 ip4_addr;
|
|
struct in6_addr ip6_addr;
|
|
|
|
if (cma_any_addr(addr) && !id_priv->afonly)
|
|
return true;
|
|
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
|
|
if (cma_get_ip_ver(hdr) != 4)
|
|
return false;
|
|
if (!cma_any_addr(addr) &&
|
|
hdr->dst_addr.ip4.addr != ip4_addr)
|
|
return false;
|
|
break;
|
|
case AF_INET6:
|
|
ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
|
|
if (cma_get_ip_ver(hdr) != 6)
|
|
return false;
|
|
if (!cma_any_addr(addr) &&
|
|
memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
|
|
return false;
|
|
break;
|
|
case AF_IB:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool cma_protocol_roce(const struct rdma_cm_id *id)
|
|
{
|
|
struct ib_device *device = id->device;
|
|
const int port_num = id->port_num ?: rdma_start_port(device);
|
|
|
|
return rdma_protocol_roce(device, port_num);
|
|
}
|
|
|
|
static bool cma_is_req_ipv6_ll(const struct cma_req_info *req)
|
|
{
|
|
const struct sockaddr *daddr =
|
|
(const struct sockaddr *)&req->listen_addr_storage;
|
|
const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
|
|
|
|
/* Returns true if the req is for IPv6 link local */
|
|
return (daddr->sa_family == AF_INET6 &&
|
|
(ipv6_addr_type(&daddr6->sin6_addr) & IPV6_ADDR_LINKLOCAL));
|
|
}
|
|
|
|
static bool cma_match_net_dev(const struct rdma_cm_id *id,
|
|
const struct net_device *net_dev,
|
|
const struct cma_req_info *req)
|
|
{
|
|
const struct rdma_addr *addr = &id->route.addr;
|
|
|
|
if (!net_dev)
|
|
/* This request is an AF_IB request */
|
|
return (!id->port_num || id->port_num == req->port) &&
|
|
(addr->src_addr.ss_family == AF_IB);
|
|
|
|
/*
|
|
* If the request is not for IPv6 link local, allow matching
|
|
* request to any netdevice of the one or multiport rdma device.
|
|
*/
|
|
if (!cma_is_req_ipv6_ll(req))
|
|
return true;
|
|
/*
|
|
* Net namespaces must match, and if the listner is listening
|
|
* on a specific netdevice than netdevice must match as well.
|
|
*/
|
|
if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
|
|
(!!addr->dev_addr.bound_dev_if ==
|
|
(addr->dev_addr.bound_dev_if == net_dev->ifindex)))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
static struct rdma_id_private *cma_find_listener(
|
|
const struct rdma_bind_list *bind_list,
|
|
const struct ib_cm_id *cm_id,
|
|
const struct ib_cm_event *ib_event,
|
|
const struct cma_req_info *req,
|
|
const struct net_device *net_dev)
|
|
{
|
|
struct rdma_id_private *id_priv, *id_priv_dev;
|
|
|
|
if (!bind_list)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
hlist_for_each_entry(id_priv, &bind_list->owners, node) {
|
|
if (cma_match_private_data(id_priv, ib_event->private_data)) {
|
|
if (id_priv->id.device == cm_id->device &&
|
|
cma_match_net_dev(&id_priv->id, net_dev, req))
|
|
return id_priv;
|
|
list_for_each_entry(id_priv_dev,
|
|
&id_priv->listen_list,
|
|
listen_list) {
|
|
if (id_priv_dev->id.device == cm_id->device &&
|
|
cma_match_net_dev(&id_priv_dev->id,
|
|
net_dev, req))
|
|
return id_priv_dev;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static struct rdma_id_private *
|
|
cma_ib_id_from_event(struct ib_cm_id *cm_id,
|
|
const struct ib_cm_event *ib_event,
|
|
struct cma_req_info *req,
|
|
struct net_device **net_dev)
|
|
{
|
|
struct rdma_bind_list *bind_list;
|
|
struct rdma_id_private *id_priv;
|
|
int err;
|
|
|
|
err = cma_save_req_info(ib_event, req);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
*net_dev = cma_get_net_dev(ib_event, req);
|
|
if (IS_ERR(*net_dev)) {
|
|
if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
|
|
/* Assuming the protocol is AF_IB */
|
|
*net_dev = NULL;
|
|
} else {
|
|
return ERR_CAST(*net_dev);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Net namespace might be getting deleted while route lookup,
|
|
* cm_id lookup is in progress. Therefore, perform netdevice
|
|
* validation, cm_id lookup under rcu lock.
|
|
* RCU lock along with netdevice state check, synchronizes with
|
|
* netdevice migrating to different net namespace and also avoids
|
|
* case where net namespace doesn't get deleted while lookup is in
|
|
* progress.
|
|
* If the device state is not IFF_UP, its properties such as ifindex
|
|
* and nd_net cannot be trusted to remain valid without rcu lock.
|
|
* net/core/dev.c change_net_namespace() ensures to synchronize with
|
|
* ongoing operations on net device after device is closed using
|
|
* synchronize_net().
|
|
*/
|
|
rcu_read_lock();
|
|
if (*net_dev) {
|
|
/*
|
|
* If netdevice is down, it is likely that it is administratively
|
|
* down or it might be migrating to different namespace.
|
|
* In that case avoid further processing, as the net namespace
|
|
* or ifindex may change.
|
|
*/
|
|
if (((*net_dev)->flags & IFF_UP) == 0) {
|
|
id_priv = ERR_PTR(-EHOSTUNREACH);
|
|
goto err;
|
|
}
|
|
|
|
if (!validate_net_dev(*net_dev,
|
|
(struct sockaddr *)&req->listen_addr_storage,
|
|
(struct sockaddr *)&req->src_addr_storage)) {
|
|
id_priv = ERR_PTR(-EHOSTUNREACH);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
|
|
rdma_ps_from_service_id(req->service_id),
|
|
cma_port_from_service_id(req->service_id));
|
|
id_priv = cma_find_listener(bind_list, cm_id, ib_event, req, *net_dev);
|
|
err:
|
|
rcu_read_unlock();
|
|
if (IS_ERR(id_priv) && *net_dev) {
|
|
dev_put(*net_dev);
|
|
*net_dev = NULL;
|
|
}
|
|
return id_priv;
|
|
}
|
|
|
|
static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
|
|
{
|
|
return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
|
|
}
|
|
|
|
static void cma_cancel_route(struct rdma_id_private *id_priv)
|
|
{
|
|
if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
|
|
if (id_priv->query)
|
|
ib_sa_cancel_query(id_priv->query_id, id_priv->query);
|
|
}
|
|
}
|
|
|
|
static void cma_cancel_listens(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_id_private *dev_id_priv;
|
|
|
|
/*
|
|
* Remove from listen_any_list to prevent added devices from spawning
|
|
* additional listen requests.
|
|
*/
|
|
mutex_lock(&lock);
|
|
list_del(&id_priv->list);
|
|
|
|
while (!list_empty(&id_priv->listen_list)) {
|
|
dev_id_priv = list_entry(id_priv->listen_list.next,
|
|
struct rdma_id_private, listen_list);
|
|
/* sync with device removal to avoid duplicate destruction */
|
|
list_del_init(&dev_id_priv->list);
|
|
list_del(&dev_id_priv->listen_list);
|
|
mutex_unlock(&lock);
|
|
|
|
rdma_destroy_id(&dev_id_priv->id);
|
|
mutex_lock(&lock);
|
|
}
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
static void cma_cancel_operation(struct rdma_id_private *id_priv,
|
|
enum rdma_cm_state state)
|
|
{
|
|
switch (state) {
|
|
case RDMA_CM_ADDR_QUERY:
|
|
rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
|
|
break;
|
|
case RDMA_CM_ROUTE_QUERY:
|
|
cma_cancel_route(id_priv);
|
|
break;
|
|
case RDMA_CM_LISTEN:
|
|
if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
|
|
cma_cancel_listens(id_priv);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void cma_release_port(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_bind_list *bind_list = id_priv->bind_list;
|
|
struct net *net = id_priv->id.route.addr.dev_addr.net;
|
|
|
|
if (!bind_list)
|
|
return;
|
|
|
|
mutex_lock(&lock);
|
|
hlist_del(&id_priv->node);
|
|
if (hlist_empty(&bind_list->owners)) {
|
|
cma_ps_remove(net, bind_list->ps, bind_list->port);
|
|
kfree(bind_list);
|
|
}
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
|
|
struct cma_multicast *mc)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
struct net_device *ndev = NULL;
|
|
|
|
if (dev_addr->bound_dev_if)
|
|
ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
|
|
if (ndev) {
|
|
cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
|
|
dev_put(ndev);
|
|
}
|
|
kref_put(&mc->mcref, release_mc);
|
|
}
|
|
|
|
static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_multicast *mc;
|
|
|
|
while (!list_empty(&id_priv->mc_list)) {
|
|
mc = container_of(id_priv->mc_list.next,
|
|
struct cma_multicast, list);
|
|
list_del(&mc->list);
|
|
if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
|
|
id_priv->id.port_num)) {
|
|
ib_sa_free_multicast(mc->multicast.ib);
|
|
kfree(mc);
|
|
} else {
|
|
cma_leave_roce_mc_group(id_priv, mc);
|
|
}
|
|
}
|
|
}
|
|
|
|
void rdma_destroy_id(struct rdma_cm_id *id)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
enum rdma_cm_state state;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
state = cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
cma_cancel_operation(id_priv, state);
|
|
|
|
/*
|
|
* Wait for any active callback to finish. New callbacks will find
|
|
* the id_priv state set to destroying and abort.
|
|
*/
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
|
|
rdma_restrack_del(&id_priv->res);
|
|
if (id_priv->cma_dev) {
|
|
if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
|
|
if (id_priv->cm_id.ib)
|
|
ib_destroy_cm_id(id_priv->cm_id.ib);
|
|
} else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
|
|
if (id_priv->cm_id.iw)
|
|
iw_destroy_cm_id(id_priv->cm_id.iw);
|
|
}
|
|
cma_leave_mc_groups(id_priv);
|
|
cma_release_dev(id_priv);
|
|
}
|
|
|
|
cma_release_port(id_priv);
|
|
cma_deref_id(id_priv);
|
|
wait_for_completion(&id_priv->comp);
|
|
|
|
if (id_priv->internal_id)
|
|
cma_deref_id(id_priv->id.context);
|
|
|
|
kfree(id_priv->id.route.path_rec);
|
|
|
|
if (id_priv->id.route.addr.dev_addr.sgid_attr)
|
|
rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
|
|
|
|
put_net(id_priv->id.route.addr.dev_addr.net);
|
|
kfree(id_priv);
|
|
}
|
|
EXPORT_SYMBOL(rdma_destroy_id);
|
|
|
|
static int cma_rep_recv(struct rdma_id_private *id_priv)
|
|
{
|
|
int ret;
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, NULL);
|
|
if (ret)
|
|
goto reject;
|
|
|
|
ret = cma_modify_qp_rts(id_priv, NULL);
|
|
if (ret)
|
|
goto reject;
|
|
|
|
ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
|
|
if (ret)
|
|
goto reject;
|
|
|
|
return 0;
|
|
reject:
|
|
pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
|
|
cma_modify_qp_err(id_priv);
|
|
ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
|
|
NULL, 0, NULL, 0);
|
|
return ret;
|
|
}
|
|
|
|
static void cma_set_rep_event_data(struct rdma_cm_event *event,
|
|
const struct ib_cm_rep_event_param *rep_data,
|
|
void *private_data)
|
|
{
|
|
event->param.conn.private_data = private_data;
|
|
event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
|
|
event->param.conn.responder_resources = rep_data->responder_resources;
|
|
event->param.conn.initiator_depth = rep_data->initiator_depth;
|
|
event->param.conn.flow_control = rep_data->flow_control;
|
|
event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
|
|
event->param.conn.srq = rep_data->srq;
|
|
event->param.conn.qp_num = rep_data->remote_qpn;
|
|
}
|
|
|
|
static int cma_ib_handler(struct ib_cm_id *cm_id,
|
|
const struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *id_priv = cm_id->context;
|
|
struct rdma_cm_event event = {};
|
|
int ret = 0;
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
|
|
id_priv->state != RDMA_CM_CONNECT) ||
|
|
(ib_event->event == IB_CM_TIMEWAIT_EXIT &&
|
|
id_priv->state != RDMA_CM_DISCONNECT))
|
|
goto out;
|
|
|
|
switch (ib_event->event) {
|
|
case IB_CM_REQ_ERROR:
|
|
case IB_CM_REP_ERROR:
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = -ETIMEDOUT;
|
|
break;
|
|
case IB_CM_REP_RECEIVED:
|
|
if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
|
|
(id_priv->id.qp_type != IB_QPT_UD))
|
|
ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
|
|
if (id_priv->id.qp) {
|
|
event.status = cma_rep_recv(id_priv);
|
|
event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
|
|
RDMA_CM_EVENT_ESTABLISHED;
|
|
} else {
|
|
event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
|
|
}
|
|
cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
|
|
ib_event->private_data);
|
|
break;
|
|
case IB_CM_RTU_RECEIVED:
|
|
case IB_CM_USER_ESTABLISHED:
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
break;
|
|
case IB_CM_DREQ_ERROR:
|
|
event.status = -ETIMEDOUT; /* fall through */
|
|
case IB_CM_DREQ_RECEIVED:
|
|
case IB_CM_DREP_RECEIVED:
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
|
|
RDMA_CM_DISCONNECT))
|
|
goto out;
|
|
event.event = RDMA_CM_EVENT_DISCONNECTED;
|
|
break;
|
|
case IB_CM_TIMEWAIT_EXIT:
|
|
event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
|
|
break;
|
|
case IB_CM_MRA_RECEIVED:
|
|
/* ignore event */
|
|
goto out;
|
|
case IB_CM_REJ_RECEIVED:
|
|
pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
|
|
ib_event->param.rej_rcvd.reason));
|
|
cma_modify_qp_err(id_priv);
|
|
event.status = ib_event->param.rej_rcvd.reason;
|
|
event.event = RDMA_CM_EVENT_REJECTED;
|
|
event.param.conn.private_data = ib_event->private_data;
|
|
event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
|
|
break;
|
|
default:
|
|
pr_err("RDMA CMA: unexpected IB CM event: %d\n",
|
|
ib_event->event);
|
|
goto out;
|
|
}
|
|
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
if (ret) {
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
id_priv->cm_id.ib = NULL;
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static struct rdma_id_private *
|
|
cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
|
|
const struct ib_cm_event *ib_event,
|
|
struct net_device *net_dev)
|
|
{
|
|
struct rdma_id_private *listen_id_priv;
|
|
struct rdma_id_private *id_priv;
|
|
struct rdma_cm_id *id;
|
|
struct rdma_route *rt;
|
|
const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
|
|
struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
|
|
const __be64 service_id =
|
|
ib_event->param.req_rcvd.primary_path->service_id;
|
|
int ret;
|
|
|
|
listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
|
|
id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
|
|
listen_id->event_handler, listen_id->context,
|
|
listen_id->ps, ib_event->param.req_rcvd.qp_type,
|
|
listen_id_priv->res.kern_name);
|
|
if (IS_ERR(id))
|
|
return NULL;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
|
|
(struct sockaddr *)&id->route.addr.dst_addr,
|
|
listen_id, ib_event, ss_family, service_id))
|
|
goto err;
|
|
|
|
rt = &id->route;
|
|
rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
|
|
rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
|
|
GFP_KERNEL);
|
|
if (!rt->path_rec)
|
|
goto err;
|
|
|
|
rt->path_rec[0] = *path;
|
|
if (rt->num_paths == 2)
|
|
rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
|
|
|
|
if (net_dev) {
|
|
rdma_copy_src_l2_addr(&rt->addr.dev_addr, net_dev);
|
|
} else {
|
|
if (!cma_protocol_roce(listen_id) &&
|
|
cma_any_addr(cma_src_addr(id_priv))) {
|
|
rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
|
|
rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
|
|
ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
|
|
} else if (!cma_any_addr(cma_src_addr(id_priv))) {
|
|
ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
}
|
|
rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
|
|
|
|
id_priv->state = RDMA_CM_CONNECT;
|
|
return id_priv;
|
|
|
|
err:
|
|
rdma_destroy_id(id);
|
|
return NULL;
|
|
}
|
|
|
|
static struct rdma_id_private *
|
|
cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
|
|
const struct ib_cm_event *ib_event,
|
|
struct net_device *net_dev)
|
|
{
|
|
const struct rdma_id_private *listen_id_priv;
|
|
struct rdma_id_private *id_priv;
|
|
struct rdma_cm_id *id;
|
|
const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
|
|
struct net *net = listen_id->route.addr.dev_addr.net;
|
|
int ret;
|
|
|
|
listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
|
|
id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
|
|
listen_id->ps, IB_QPT_UD,
|
|
listen_id_priv->res.kern_name);
|
|
if (IS_ERR(id))
|
|
return NULL;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
|
|
(struct sockaddr *)&id->route.addr.dst_addr,
|
|
listen_id, ib_event, ss_family,
|
|
ib_event->param.sidr_req_rcvd.service_id))
|
|
goto err;
|
|
|
|
if (net_dev) {
|
|
rdma_copy_src_l2_addr(&id->route.addr.dev_addr, net_dev);
|
|
} else {
|
|
if (!cma_any_addr(cma_src_addr(id_priv))) {
|
|
ret = cma_translate_addr(cma_src_addr(id_priv),
|
|
&id->route.addr.dev_addr);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
id_priv->state = RDMA_CM_CONNECT;
|
|
return id_priv;
|
|
err:
|
|
rdma_destroy_id(id);
|
|
return NULL;
|
|
}
|
|
|
|
static void cma_set_req_event_data(struct rdma_cm_event *event,
|
|
const struct ib_cm_req_event_param *req_data,
|
|
void *private_data, int offset)
|
|
{
|
|
event->param.conn.private_data = private_data + offset;
|
|
event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
|
|
event->param.conn.responder_resources = req_data->responder_resources;
|
|
event->param.conn.initiator_depth = req_data->initiator_depth;
|
|
event->param.conn.flow_control = req_data->flow_control;
|
|
event->param.conn.retry_count = req_data->retry_count;
|
|
event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
|
|
event->param.conn.srq = req_data->srq;
|
|
event->param.conn.qp_num = req_data->remote_qpn;
|
|
}
|
|
|
|
static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
|
|
const struct ib_cm_event *ib_event)
|
|
{
|
|
return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
|
|
(ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
|
|
((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
|
|
(id->qp_type == IB_QPT_UD)) ||
|
|
(!id->qp_type));
|
|
}
|
|
|
|
static int cma_ib_req_handler(struct ib_cm_id *cm_id,
|
|
const struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *listen_id, *conn_id = NULL;
|
|
struct rdma_cm_event event = {};
|
|
struct cma_req_info req = {};
|
|
struct net_device *net_dev;
|
|
u8 offset;
|
|
int ret;
|
|
|
|
listen_id = cma_ib_id_from_event(cm_id, ib_event, &req, &net_dev);
|
|
if (IS_ERR(listen_id))
|
|
return PTR_ERR(listen_id);
|
|
|
|
if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
|
|
ret = -EINVAL;
|
|
goto net_dev_put;
|
|
}
|
|
|
|
mutex_lock(&listen_id->handler_mutex);
|
|
if (listen_id->state != RDMA_CM_LISTEN) {
|
|
ret = -ECONNABORTED;
|
|
goto err1;
|
|
}
|
|
|
|
offset = cma_user_data_offset(listen_id);
|
|
event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
|
|
if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
|
|
conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
|
|
event.param.ud.private_data = ib_event->private_data + offset;
|
|
event.param.ud.private_data_len =
|
|
IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
|
|
} else {
|
|
conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
|
|
cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
|
|
ib_event->private_data, offset);
|
|
}
|
|
if (!conn_id) {
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
|
|
ret = cma_ib_acquire_dev(conn_id, listen_id, &req);
|
|
if (ret)
|
|
goto err2;
|
|
|
|
conn_id->cm_id.ib = cm_id;
|
|
cm_id->context = conn_id;
|
|
cm_id->cm_handler = cma_ib_handler;
|
|
|
|
/*
|
|
* Protect against the user destroying conn_id from another thread
|
|
* until we're done accessing it.
|
|
*/
|
|
atomic_inc(&conn_id->refcount);
|
|
ret = conn_id->id.event_handler(&conn_id->id, &event);
|
|
if (ret)
|
|
goto err3;
|
|
/*
|
|
* Acquire mutex to prevent user executing rdma_destroy_id()
|
|
* while we're accessing the cm_id.
|
|
*/
|
|
mutex_lock(&lock);
|
|
if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
|
|
(conn_id->id.qp_type != IB_QPT_UD))
|
|
ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
|
|
mutex_unlock(&lock);
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
mutex_unlock(&listen_id->handler_mutex);
|
|
cma_deref_id(conn_id);
|
|
if (net_dev)
|
|
dev_put(net_dev);
|
|
return 0;
|
|
|
|
err3:
|
|
cma_deref_id(conn_id);
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
conn_id->cm_id.ib = NULL;
|
|
err2:
|
|
cma_exch(conn_id, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
err1:
|
|
mutex_unlock(&listen_id->handler_mutex);
|
|
if (conn_id)
|
|
rdma_destroy_id(&conn_id->id);
|
|
|
|
net_dev_put:
|
|
if (net_dev)
|
|
dev_put(net_dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
|
|
{
|
|
if (addr->sa_family == AF_IB)
|
|
return ((struct sockaddr_ib *) addr)->sib_sid;
|
|
|
|
return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
|
|
}
|
|
EXPORT_SYMBOL(rdma_get_service_id);
|
|
|
|
void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
|
|
union ib_gid *dgid)
|
|
{
|
|
struct rdma_addr *addr = &cm_id->route.addr;
|
|
|
|
if (!cm_id->device) {
|
|
if (sgid)
|
|
memset(sgid, 0, sizeof(*sgid));
|
|
if (dgid)
|
|
memset(dgid, 0, sizeof(*dgid));
|
|
return;
|
|
}
|
|
|
|
if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
|
|
if (sgid)
|
|
rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
|
|
if (dgid)
|
|
rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
|
|
} else {
|
|
if (sgid)
|
|
rdma_addr_get_sgid(&addr->dev_addr, sgid);
|
|
if (dgid)
|
|
rdma_addr_get_dgid(&addr->dev_addr, dgid);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(rdma_read_gids);
|
|
|
|
static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
|
|
{
|
|
struct rdma_id_private *id_priv = iw_id->context;
|
|
struct rdma_cm_event event = {};
|
|
int ret = 0;
|
|
struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
|
|
struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (id_priv->state != RDMA_CM_CONNECT)
|
|
goto out;
|
|
|
|
switch (iw_event->event) {
|
|
case IW_CM_EVENT_CLOSE:
|
|
event.event = RDMA_CM_EVENT_DISCONNECTED;
|
|
break;
|
|
case IW_CM_EVENT_CONNECT_REPLY:
|
|
memcpy(cma_src_addr(id_priv), laddr,
|
|
rdma_addr_size(laddr));
|
|
memcpy(cma_dst_addr(id_priv), raddr,
|
|
rdma_addr_size(raddr));
|
|
switch (iw_event->status) {
|
|
case 0:
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
event.param.conn.initiator_depth = iw_event->ird;
|
|
event.param.conn.responder_resources = iw_event->ord;
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ECONNREFUSED:
|
|
event.event = RDMA_CM_EVENT_REJECTED;
|
|
break;
|
|
case -ETIMEDOUT:
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
break;
|
|
default:
|
|
event.event = RDMA_CM_EVENT_CONNECT_ERROR;
|
|
break;
|
|
}
|
|
break;
|
|
case IW_CM_EVENT_ESTABLISHED:
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
event.param.conn.initiator_depth = iw_event->ird;
|
|
event.param.conn.responder_resources = iw_event->ord;
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
|
|
event.status = iw_event->status;
|
|
event.param.conn.private_data = iw_event->private_data;
|
|
event.param.conn.private_data_len = iw_event->private_data_len;
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
if (ret) {
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
id_priv->cm_id.iw = NULL;
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int iw_conn_req_handler(struct iw_cm_id *cm_id,
|
|
struct iw_cm_event *iw_event)
|
|
{
|
|
struct rdma_cm_id *new_cm_id;
|
|
struct rdma_id_private *listen_id, *conn_id;
|
|
struct rdma_cm_event event = {};
|
|
int ret = -ECONNABORTED;
|
|
struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
|
|
struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
|
|
|
|
event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
|
|
event.param.conn.private_data = iw_event->private_data;
|
|
event.param.conn.private_data_len = iw_event->private_data_len;
|
|
event.param.conn.initiator_depth = iw_event->ird;
|
|
event.param.conn.responder_resources = iw_event->ord;
|
|
|
|
listen_id = cm_id->context;
|
|
|
|
mutex_lock(&listen_id->handler_mutex);
|
|
if (listen_id->state != RDMA_CM_LISTEN)
|
|
goto out;
|
|
|
|
/* Create a new RDMA id for the new IW CM ID */
|
|
new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
|
|
listen_id->id.event_handler,
|
|
listen_id->id.context,
|
|
RDMA_PS_TCP, IB_QPT_RC,
|
|
listen_id->res.kern_name);
|
|
if (IS_ERR(new_cm_id)) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
conn_id = container_of(new_cm_id, struct rdma_id_private, id);
|
|
mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
|
|
conn_id->state = RDMA_CM_CONNECT;
|
|
|
|
ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
|
|
if (ret) {
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
|
|
ret = cma_iw_acquire_dev(conn_id, listen_id);
|
|
if (ret) {
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
|
|
conn_id->cm_id.iw = cm_id;
|
|
cm_id->context = conn_id;
|
|
cm_id->cm_handler = cma_iw_handler;
|
|
|
|
memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
|
|
memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
|
|
|
|
/*
|
|
* Protect against the user destroying conn_id from another thread
|
|
* until we're done accessing it.
|
|
*/
|
|
atomic_inc(&conn_id->refcount);
|
|
ret = conn_id->id.event_handler(&conn_id->id, &event);
|
|
if (ret) {
|
|
/* User wants to destroy the CM ID */
|
|
conn_id->cm_id.iw = NULL;
|
|
cma_exch(conn_id, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
cma_deref_id(conn_id);
|
|
rdma_destroy_id(&conn_id->id);
|
|
goto out;
|
|
}
|
|
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
cma_deref_id(conn_id);
|
|
|
|
out:
|
|
mutex_unlock(&listen_id->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_ib_listen(struct rdma_id_private *id_priv)
|
|
{
|
|
struct sockaddr *addr;
|
|
struct ib_cm_id *id;
|
|
__be64 svc_id;
|
|
|
|
addr = cma_src_addr(id_priv);
|
|
svc_id = rdma_get_service_id(&id_priv->id, addr);
|
|
id = ib_cm_insert_listen(id_priv->id.device,
|
|
cma_ib_req_handler, svc_id);
|
|
if (IS_ERR(id))
|
|
return PTR_ERR(id);
|
|
id_priv->cm_id.ib = id;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
|
|
{
|
|
int ret;
|
|
struct iw_cm_id *id;
|
|
|
|
id = iw_create_cm_id(id_priv->id.device,
|
|
iw_conn_req_handler,
|
|
id_priv);
|
|
if (IS_ERR(id))
|
|
return PTR_ERR(id);
|
|
|
|
id->tos = id_priv->tos;
|
|
id_priv->cm_id.iw = id;
|
|
|
|
memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
|
|
rdma_addr_size(cma_src_addr(id_priv)));
|
|
|
|
ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
|
|
|
|
if (ret) {
|
|
iw_destroy_cm_id(id_priv->cm_id.iw);
|
|
id_priv->cm_id.iw = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cma_listen_handler(struct rdma_cm_id *id,
|
|
struct rdma_cm_event *event)
|
|
{
|
|
struct rdma_id_private *id_priv = id->context;
|
|
|
|
id->context = id_priv->id.context;
|
|
id->event_handler = id_priv->id.event_handler;
|
|
return id_priv->id.event_handler(id, event);
|
|
}
|
|
|
|
static void cma_listen_on_dev(struct rdma_id_private *id_priv,
|
|
struct cma_device *cma_dev)
|
|
{
|
|
struct rdma_id_private *dev_id_priv;
|
|
struct rdma_cm_id *id;
|
|
struct net *net = id_priv->id.route.addr.dev_addr.net;
|
|
int ret;
|
|
|
|
if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
|
|
return;
|
|
|
|
id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
|
|
id_priv->id.qp_type, id_priv->res.kern_name);
|
|
if (IS_ERR(id))
|
|
return;
|
|
|
|
dev_id_priv = container_of(id, struct rdma_id_private, id);
|
|
|
|
dev_id_priv->state = RDMA_CM_ADDR_BOUND;
|
|
memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
|
|
rdma_addr_size(cma_src_addr(id_priv)));
|
|
|
|
_cma_attach_to_dev(dev_id_priv, cma_dev);
|
|
list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
|
|
atomic_inc(&id_priv->refcount);
|
|
dev_id_priv->internal_id = 1;
|
|
dev_id_priv->afonly = id_priv->afonly;
|
|
|
|
ret = rdma_listen(id, id_priv->backlog);
|
|
if (ret)
|
|
dev_warn(&cma_dev->device->dev,
|
|
"RDMA CMA: cma_listen_on_dev, error %d\n", ret);
|
|
}
|
|
|
|
static void cma_listen_on_all(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_device *cma_dev;
|
|
|
|
mutex_lock(&lock);
|
|
list_add_tail(&id_priv->list, &listen_any_list);
|
|
list_for_each_entry(cma_dev, &dev_list, list)
|
|
cma_listen_on_dev(id_priv, cma_dev);
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
void rdma_set_service_type(struct rdma_cm_id *id, int tos)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
id_priv->tos = (u8) tos;
|
|
id_priv->tos_set = true;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_service_type);
|
|
|
|
static void cma_query_handler(int status, struct sa_path_rec *path_rec,
|
|
void *context)
|
|
{
|
|
struct cma_work *work = context;
|
|
struct rdma_route *route;
|
|
|
|
route = &work->id->id.route;
|
|
|
|
if (!status) {
|
|
route->num_paths = 1;
|
|
*route->path_rec = *path_rec;
|
|
} else {
|
|
work->old_state = RDMA_CM_ROUTE_QUERY;
|
|
work->new_state = RDMA_CM_ADDR_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
|
|
work->event.status = status;
|
|
pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
|
|
status);
|
|
}
|
|
|
|
queue_work(cma_wq, &work->work);
|
|
}
|
|
|
|
static int cma_query_ib_route(struct rdma_id_private *id_priv,
|
|
unsigned long timeout_ms, struct cma_work *work)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
struct sa_path_rec path_rec;
|
|
ib_sa_comp_mask comp_mask;
|
|
struct sockaddr_in6 *sin6;
|
|
struct sockaddr_ib *sib;
|
|
|
|
memset(&path_rec, 0, sizeof path_rec);
|
|
|
|
if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
|
|
path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
|
|
else
|
|
path_rec.rec_type = SA_PATH_REC_TYPE_IB;
|
|
rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
|
|
rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
|
|
path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
|
|
path_rec.numb_path = 1;
|
|
path_rec.reversible = 1;
|
|
path_rec.service_id = rdma_get_service_id(&id_priv->id,
|
|
cma_dst_addr(id_priv));
|
|
|
|
comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
|
|
IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
|
|
IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
|
|
|
|
switch (cma_family(id_priv)) {
|
|
case AF_INET:
|
|
path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
|
|
comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
|
|
break;
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
|
|
path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
|
|
comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
|
|
break;
|
|
case AF_IB:
|
|
sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
|
|
path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
|
|
comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
|
|
break;
|
|
}
|
|
|
|
id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
|
|
id_priv->id.port_num, &path_rec,
|
|
comp_mask, timeout_ms,
|
|
GFP_KERNEL, cma_query_handler,
|
|
work, &id_priv->query);
|
|
|
|
return (id_priv->query_id < 0) ? id_priv->query_id : 0;
|
|
}
|
|
|
|
static void cma_work_handler(struct work_struct *_work)
|
|
{
|
|
struct cma_work *work = container_of(_work, struct cma_work, work);
|
|
struct rdma_id_private *id_priv = work->id;
|
|
int destroy = 0;
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
|
|
goto out;
|
|
|
|
if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
destroy = 1;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
cma_deref_id(id_priv);
|
|
if (destroy)
|
|
rdma_destroy_id(&id_priv->id);
|
|
kfree(work);
|
|
}
|
|
|
|
static void cma_ndev_work_handler(struct work_struct *_work)
|
|
{
|
|
struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
|
|
struct rdma_id_private *id_priv = work->id;
|
|
int destroy = 0;
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (id_priv->state == RDMA_CM_DESTROYING ||
|
|
id_priv->state == RDMA_CM_DEVICE_REMOVAL)
|
|
goto out;
|
|
|
|
if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
destroy = 1;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
cma_deref_id(id_priv);
|
|
if (destroy)
|
|
rdma_destroy_id(&id_priv->id);
|
|
kfree(work);
|
|
}
|
|
|
|
static void cma_init_resolve_route_work(struct cma_work *work,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
work->id = id_priv;
|
|
INIT_WORK(&work->work, cma_work_handler);
|
|
work->old_state = RDMA_CM_ROUTE_QUERY;
|
|
work->new_state = RDMA_CM_ROUTE_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
|
|
}
|
|
|
|
static void cma_init_resolve_addr_work(struct cma_work *work,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
work->id = id_priv;
|
|
INIT_WORK(&work->work, cma_work_handler);
|
|
work->old_state = RDMA_CM_ADDR_QUERY;
|
|
work->new_state = RDMA_CM_ADDR_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
|
|
}
|
|
|
|
static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
|
|
unsigned long timeout_ms)
|
|
{
|
|
struct rdma_route *route = &id_priv->id.route;
|
|
struct cma_work *work;
|
|
int ret;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
cma_init_resolve_route_work(work, id_priv);
|
|
|
|
route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
|
|
if (!route->path_rec) {
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
ret = cma_query_ib_route(id_priv, timeout_ms, work);
|
|
if (ret)
|
|
goto err2;
|
|
|
|
return 0;
|
|
err2:
|
|
kfree(route->path_rec);
|
|
route->path_rec = NULL;
|
|
err1:
|
|
kfree(work);
|
|
return ret;
|
|
}
|
|
|
|
static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
|
|
unsigned long supported_gids,
|
|
enum ib_gid_type default_gid)
|
|
{
|
|
if ((network_type == RDMA_NETWORK_IPV4 ||
|
|
network_type == RDMA_NETWORK_IPV6) &&
|
|
test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
|
|
return IB_GID_TYPE_ROCE_UDP_ENCAP;
|
|
|
|
return default_gid;
|
|
}
|
|
|
|
/*
|
|
* cma_iboe_set_path_rec_l2_fields() is helper function which sets
|
|
* path record type based on GID type.
|
|
* It also sets up other L2 fields which includes destination mac address
|
|
* netdev ifindex, of the path record.
|
|
* It returns the netdev of the bound interface for this path record entry.
|
|
*/
|
|
static struct net_device *
|
|
cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_route *route = &id_priv->id.route;
|
|
enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
|
|
struct rdma_addr *addr = &route->addr;
|
|
unsigned long supported_gids;
|
|
struct net_device *ndev;
|
|
|
|
if (!addr->dev_addr.bound_dev_if)
|
|
return NULL;
|
|
|
|
ndev = dev_get_by_index(addr->dev_addr.net,
|
|
addr->dev_addr.bound_dev_if);
|
|
if (!ndev)
|
|
return NULL;
|
|
|
|
supported_gids = roce_gid_type_mask_support(id_priv->id.device,
|
|
id_priv->id.port_num);
|
|
gid_type = cma_route_gid_type(addr->dev_addr.network,
|
|
supported_gids,
|
|
id_priv->gid_type);
|
|
/* Use the hint from IP Stack to select GID Type */
|
|
if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
|
|
gid_type = ib_network_to_gid_type(addr->dev_addr.network);
|
|
route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
|
|
|
|
route->path_rec->roce.route_resolved = true;
|
|
sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
|
|
return ndev;
|
|
}
|
|
|
|
int rdma_set_ib_path(struct rdma_cm_id *id,
|
|
struct sa_path_rec *path_rec)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct net_device *ndev;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
|
|
RDMA_CM_ROUTE_RESOLVED))
|
|
return -EINVAL;
|
|
|
|
id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
|
|
GFP_KERNEL);
|
|
if (!id->route.path_rec) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
if (rdma_protocol_roce(id->device, id->port_num)) {
|
|
ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
|
|
if (!ndev) {
|
|
ret = -ENODEV;
|
|
goto err_free;
|
|
}
|
|
dev_put(ndev);
|
|
}
|
|
|
|
id->route.num_paths = 1;
|
|
return 0;
|
|
|
|
err_free:
|
|
kfree(id->route.path_rec);
|
|
id->route.path_rec = NULL;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_ib_path);
|
|
|
|
static int cma_resolve_iw_route(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_work *work;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
cma_init_resolve_route_work(work, id_priv);
|
|
queue_work(cma_wq, &work->work);
|
|
return 0;
|
|
}
|
|
|
|
static int iboe_tos_to_sl(struct net_device *ndev, int tos)
|
|
{
|
|
int prio;
|
|
struct net_device *dev;
|
|
|
|
prio = rt_tos2priority(tos);
|
|
dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
|
|
if (dev->num_tc)
|
|
return netdev_get_prio_tc_map(dev, prio);
|
|
|
|
#if IS_ENABLED(CONFIG_VLAN_8021Q)
|
|
if (is_vlan_dev(ndev))
|
|
return (vlan_dev_get_egress_qos_mask(ndev, prio) &
|
|
VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_route *route = &id_priv->id.route;
|
|
struct rdma_addr *addr = &route->addr;
|
|
struct cma_work *work;
|
|
int ret;
|
|
struct net_device *ndev;
|
|
|
|
u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
|
|
rdma_start_port(id_priv->cma_dev->device)];
|
|
u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
|
|
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
|
|
if (!route->path_rec) {
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
route->num_paths = 1;
|
|
|
|
ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
|
|
if (!ndev) {
|
|
ret = -ENODEV;
|
|
goto err2;
|
|
}
|
|
|
|
rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
|
|
&route->path_rec->sgid);
|
|
rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
|
|
&route->path_rec->dgid);
|
|
|
|
if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
|
|
/* TODO: get the hoplimit from the inet/inet6 device */
|
|
route->path_rec->hop_limit = addr->dev_addr.hoplimit;
|
|
else
|
|
route->path_rec->hop_limit = 1;
|
|
route->path_rec->reversible = 1;
|
|
route->path_rec->pkey = cpu_to_be16(0xffff);
|
|
route->path_rec->mtu_selector = IB_SA_EQ;
|
|
route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
|
|
route->path_rec->traffic_class = tos;
|
|
route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
|
|
route->path_rec->rate_selector = IB_SA_EQ;
|
|
route->path_rec->rate = iboe_get_rate(ndev);
|
|
dev_put(ndev);
|
|
route->path_rec->packet_life_time_selector = IB_SA_EQ;
|
|
route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
|
|
if (!route->path_rec->mtu) {
|
|
ret = -EINVAL;
|
|
goto err2;
|
|
}
|
|
|
|
cma_init_resolve_route_work(work, id_priv);
|
|
queue_work(cma_wq, &work->work);
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
kfree(route->path_rec);
|
|
route->path_rec = NULL;
|
|
err1:
|
|
kfree(work);
|
|
return ret;
|
|
}
|
|
|
|
int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
|
|
return -EINVAL;
|
|
|
|
atomic_inc(&id_priv->refcount);
|
|
if (rdma_cap_ib_sa(id->device, id->port_num))
|
|
ret = cma_resolve_ib_route(id_priv, timeout_ms);
|
|
else if (rdma_protocol_roce(id->device, id->port_num))
|
|
ret = cma_resolve_iboe_route(id_priv);
|
|
else if (rdma_protocol_iwarp(id->device, id->port_num))
|
|
ret = cma_resolve_iw_route(id_priv);
|
|
else
|
|
ret = -ENOSYS;
|
|
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
|
|
cma_deref_id(id_priv);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_resolve_route);
|
|
|
|
static void cma_set_loopback(struct sockaddr *addr)
|
|
{
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
|
break;
|
|
case AF_INET6:
|
|
ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
|
|
0, 0, 0, htonl(1));
|
|
break;
|
|
default:
|
|
ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
|
|
0, 0, 0, htonl(1));
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int cma_bind_loopback(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_device *cma_dev, *cur_dev;
|
|
union ib_gid gid;
|
|
enum ib_port_state port_state;
|
|
u16 pkey;
|
|
int ret;
|
|
u8 p;
|
|
|
|
cma_dev = NULL;
|
|
mutex_lock(&lock);
|
|
list_for_each_entry(cur_dev, &dev_list, list) {
|
|
if (cma_family(id_priv) == AF_IB &&
|
|
!rdma_cap_ib_cm(cur_dev->device, 1))
|
|
continue;
|
|
|
|
if (!cma_dev)
|
|
cma_dev = cur_dev;
|
|
|
|
for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
|
|
if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
|
|
port_state == IB_PORT_ACTIVE) {
|
|
cma_dev = cur_dev;
|
|
goto port_found;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!cma_dev) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
p = 1;
|
|
|
|
port_found:
|
|
ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
|
|
if (ret)
|
|
goto out;
|
|
|
|
id_priv->id.route.addr.dev_addr.dev_type =
|
|
(rdma_protocol_ib(cma_dev->device, p)) ?
|
|
ARPHRD_INFINIBAND : ARPHRD_ETHER;
|
|
|
|
rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
|
|
id_priv->id.port_num = p;
|
|
cma_attach_to_dev(id_priv, cma_dev);
|
|
cma_set_loopback(cma_src_addr(id_priv));
|
|
out:
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
static void addr_handler(int status, struct sockaddr *src_addr,
|
|
struct rdma_dev_addr *dev_addr, void *context)
|
|
{
|
|
struct rdma_id_private *id_priv = context;
|
|
struct rdma_cm_event event = {};
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
|
|
RDMA_CM_ADDR_RESOLVED))
|
|
goto out;
|
|
|
|
memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
|
|
if (!status && !id_priv->cma_dev) {
|
|
status = cma_acquire_dev_by_src_ip(id_priv);
|
|
if (status)
|
|
pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
|
|
status);
|
|
} else {
|
|
pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
|
|
}
|
|
|
|
if (status) {
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
|
|
RDMA_CM_ADDR_BOUND))
|
|
goto out;
|
|
event.event = RDMA_CM_EVENT_ADDR_ERROR;
|
|
event.status = status;
|
|
} else
|
|
event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
|
|
|
|
if (id_priv->id.event_handler(&id_priv->id, &event)) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
}
|
|
|
|
static int cma_resolve_loopback(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_work *work;
|
|
union ib_gid gid;
|
|
int ret;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
if (!id_priv->cma_dev) {
|
|
ret = cma_bind_loopback(id_priv);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
|
|
cma_init_resolve_addr_work(work, id_priv);
|
|
queue_work(cma_wq, &work->work);
|
|
return 0;
|
|
err:
|
|
kfree(work);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_work *work;
|
|
int ret;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
if (!id_priv->cma_dev) {
|
|
ret = cma_resolve_ib_dev(id_priv);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
|
|
&(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
|
|
|
|
cma_init_resolve_addr_work(work, id_priv);
|
|
queue_work(cma_wq, &work->work);
|
|
return 0;
|
|
err:
|
|
kfree(work);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
|
|
const struct sockaddr *dst_addr)
|
|
{
|
|
if (!src_addr || !src_addr->sa_family) {
|
|
src_addr = (struct sockaddr *) &id->route.addr.src_addr;
|
|
src_addr->sa_family = dst_addr->sa_family;
|
|
if (IS_ENABLED(CONFIG_IPV6) &&
|
|
dst_addr->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
|
|
struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
|
|
src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
|
|
if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
|
|
id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
|
|
} else if (dst_addr->sa_family == AF_IB) {
|
|
((struct sockaddr_ib *) src_addr)->sib_pkey =
|
|
((struct sockaddr_ib *) dst_addr)->sib_pkey;
|
|
}
|
|
}
|
|
return rdma_bind_addr(id, src_addr);
|
|
}
|
|
|
|
int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
|
|
const struct sockaddr *dst_addr, unsigned long timeout_ms)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (id_priv->state == RDMA_CM_IDLE) {
|
|
ret = cma_bind_addr(id, src_addr, dst_addr);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (cma_family(id_priv) != dst_addr->sa_family)
|
|
return -EINVAL;
|
|
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
|
|
return -EINVAL;
|
|
|
|
memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
|
|
if (cma_any_addr(dst_addr)) {
|
|
ret = cma_resolve_loopback(id_priv);
|
|
} else {
|
|
if (dst_addr->sa_family == AF_IB) {
|
|
ret = cma_resolve_ib_addr(id_priv);
|
|
} else {
|
|
ret = rdma_resolve_ip(cma_src_addr(id_priv), dst_addr,
|
|
&id->route.addr.dev_addr,
|
|
timeout_ms, addr_handler,
|
|
false, id_priv);
|
|
}
|
|
}
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_resolve_addr);
|
|
|
|
int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
spin_lock_irqsave(&id_priv->lock, flags);
|
|
if (reuse || id_priv->state == RDMA_CM_IDLE) {
|
|
id_priv->reuseaddr = reuse;
|
|
ret = 0;
|
|
} else {
|
|
ret = -EINVAL;
|
|
}
|
|
spin_unlock_irqrestore(&id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_reuseaddr);
|
|
|
|
int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
spin_lock_irqsave(&id_priv->lock, flags);
|
|
if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
|
|
id_priv->options |= (1 << CMA_OPTION_AFONLY);
|
|
id_priv->afonly = afonly;
|
|
ret = 0;
|
|
} else {
|
|
ret = -EINVAL;
|
|
}
|
|
spin_unlock_irqrestore(&id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_afonly);
|
|
|
|
static void cma_bind_port(struct rdma_bind_list *bind_list,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
struct sockaddr *addr;
|
|
struct sockaddr_ib *sib;
|
|
u64 sid, mask;
|
|
__be16 port;
|
|
|
|
addr = cma_src_addr(id_priv);
|
|
port = htons(bind_list->port);
|
|
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
((struct sockaddr_in *) addr)->sin_port = port;
|
|
break;
|
|
case AF_INET6:
|
|
((struct sockaddr_in6 *) addr)->sin6_port = port;
|
|
break;
|
|
case AF_IB:
|
|
sib = (struct sockaddr_ib *) addr;
|
|
sid = be64_to_cpu(sib->sib_sid);
|
|
mask = be64_to_cpu(sib->sib_sid_mask);
|
|
sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
|
|
sib->sib_sid_mask = cpu_to_be64(~0ULL);
|
|
break;
|
|
}
|
|
id_priv->bind_list = bind_list;
|
|
hlist_add_head(&id_priv->node, &bind_list->owners);
|
|
}
|
|
|
|
static int cma_alloc_port(enum rdma_ucm_port_space ps,
|
|
struct rdma_id_private *id_priv, unsigned short snum)
|
|
{
|
|
struct rdma_bind_list *bind_list;
|
|
int ret;
|
|
|
|
bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
|
|
if (!bind_list)
|
|
return -ENOMEM;
|
|
|
|
ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
|
|
snum);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
bind_list->ps = ps;
|
|
bind_list->port = (unsigned short)ret;
|
|
cma_bind_port(bind_list, id_priv);
|
|
return 0;
|
|
err:
|
|
kfree(bind_list);
|
|
return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
|
|
}
|
|
|
|
static int cma_port_is_unique(struct rdma_bind_list *bind_list,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_id_private *cur_id;
|
|
struct sockaddr *daddr = cma_dst_addr(id_priv);
|
|
struct sockaddr *saddr = cma_src_addr(id_priv);
|
|
__be16 dport = cma_port(daddr);
|
|
|
|
hlist_for_each_entry(cur_id, &bind_list->owners, node) {
|
|
struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
|
|
struct sockaddr *cur_saddr = cma_src_addr(cur_id);
|
|
__be16 cur_dport = cma_port(cur_daddr);
|
|
|
|
if (id_priv == cur_id)
|
|
continue;
|
|
|
|
/* different dest port -> unique */
|
|
if (!cma_any_port(daddr) &&
|
|
!cma_any_port(cur_daddr) &&
|
|
(dport != cur_dport))
|
|
continue;
|
|
|
|
/* different src address -> unique */
|
|
if (!cma_any_addr(saddr) &&
|
|
!cma_any_addr(cur_saddr) &&
|
|
cma_addr_cmp(saddr, cur_saddr))
|
|
continue;
|
|
|
|
/* different dst address -> unique */
|
|
if (!cma_any_addr(daddr) &&
|
|
!cma_any_addr(cur_daddr) &&
|
|
cma_addr_cmp(daddr, cur_daddr))
|
|
continue;
|
|
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
static unsigned int last_used_port;
|
|
int low, high, remaining;
|
|
unsigned int rover;
|
|
struct net *net = id_priv->id.route.addr.dev_addr.net;
|
|
|
|
inet_get_local_port_range(net, &low, &high);
|
|
remaining = (high - low) + 1;
|
|
rover = prandom_u32() % remaining + low;
|
|
retry:
|
|
if (last_used_port != rover) {
|
|
struct rdma_bind_list *bind_list;
|
|
int ret;
|
|
|
|
bind_list = cma_ps_find(net, ps, (unsigned short)rover);
|
|
|
|
if (!bind_list) {
|
|
ret = cma_alloc_port(ps, id_priv, rover);
|
|
} else {
|
|
ret = cma_port_is_unique(bind_list, id_priv);
|
|
if (!ret)
|
|
cma_bind_port(bind_list, id_priv);
|
|
}
|
|
/*
|
|
* Remember previously used port number in order to avoid
|
|
* re-using same port immediately after it is closed.
|
|
*/
|
|
if (!ret)
|
|
last_used_port = rover;
|
|
if (ret != -EADDRNOTAVAIL)
|
|
return ret;
|
|
}
|
|
if (--remaining) {
|
|
rover++;
|
|
if ((rover < low) || (rover > high))
|
|
rover = low;
|
|
goto retry;
|
|
}
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
|
|
/*
|
|
* Check that the requested port is available. This is called when trying to
|
|
* bind to a specific port, or when trying to listen on a bound port. In
|
|
* the latter case, the provided id_priv may already be on the bind_list, but
|
|
* we still need to check that it's okay to start listening.
|
|
*/
|
|
static int cma_check_port(struct rdma_bind_list *bind_list,
|
|
struct rdma_id_private *id_priv, uint8_t reuseaddr)
|
|
{
|
|
struct rdma_id_private *cur_id;
|
|
struct sockaddr *addr, *cur_addr;
|
|
|
|
addr = cma_src_addr(id_priv);
|
|
hlist_for_each_entry(cur_id, &bind_list->owners, node) {
|
|
if (id_priv == cur_id)
|
|
continue;
|
|
|
|
if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
|
|
cur_id->reuseaddr)
|
|
continue;
|
|
|
|
cur_addr = cma_src_addr(cur_id);
|
|
if (id_priv->afonly && cur_id->afonly &&
|
|
(addr->sa_family != cur_addr->sa_family))
|
|
continue;
|
|
|
|
if (cma_any_addr(addr) || cma_any_addr(cur_addr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
if (!cma_addr_cmp(addr, cur_addr))
|
|
return -EADDRINUSE;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int cma_use_port(enum rdma_ucm_port_space ps,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_bind_list *bind_list;
|
|
unsigned short snum;
|
|
int ret;
|
|
|
|
snum = ntohs(cma_port(cma_src_addr(id_priv)));
|
|
if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
|
|
return -EACCES;
|
|
|
|
bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
|
|
if (!bind_list) {
|
|
ret = cma_alloc_port(ps, id_priv, snum);
|
|
} else {
|
|
ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
|
|
if (!ret)
|
|
cma_bind_port(bind_list, id_priv);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int cma_bind_listen(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_bind_list *bind_list = id_priv->bind_list;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&lock);
|
|
if (bind_list->owners.first->next)
|
|
ret = cma_check_port(bind_list, id_priv, 0);
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
static enum rdma_ucm_port_space
|
|
cma_select_inet_ps(struct rdma_id_private *id_priv)
|
|
{
|
|
switch (id_priv->id.ps) {
|
|
case RDMA_PS_TCP:
|
|
case RDMA_PS_UDP:
|
|
case RDMA_PS_IPOIB:
|
|
case RDMA_PS_IB:
|
|
return id_priv->id.ps;
|
|
default:
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static enum rdma_ucm_port_space
|
|
cma_select_ib_ps(struct rdma_id_private *id_priv)
|
|
{
|
|
enum rdma_ucm_port_space ps = 0;
|
|
struct sockaddr_ib *sib;
|
|
u64 sid_ps, mask, sid;
|
|
|
|
sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
|
|
mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
|
|
sid = be64_to_cpu(sib->sib_sid) & mask;
|
|
|
|
if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
|
|
sid_ps = RDMA_IB_IP_PS_IB;
|
|
ps = RDMA_PS_IB;
|
|
} else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
|
|
(sid == (RDMA_IB_IP_PS_TCP & mask))) {
|
|
sid_ps = RDMA_IB_IP_PS_TCP;
|
|
ps = RDMA_PS_TCP;
|
|
} else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
|
|
(sid == (RDMA_IB_IP_PS_UDP & mask))) {
|
|
sid_ps = RDMA_IB_IP_PS_UDP;
|
|
ps = RDMA_PS_UDP;
|
|
}
|
|
|
|
if (ps) {
|
|
sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
|
|
sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
|
|
be64_to_cpu(sib->sib_sid_mask));
|
|
}
|
|
return ps;
|
|
}
|
|
|
|
static int cma_get_port(struct rdma_id_private *id_priv)
|
|
{
|
|
enum rdma_ucm_port_space ps;
|
|
int ret;
|
|
|
|
if (cma_family(id_priv) != AF_IB)
|
|
ps = cma_select_inet_ps(id_priv);
|
|
else
|
|
ps = cma_select_ib_ps(id_priv);
|
|
if (!ps)
|
|
return -EPROTONOSUPPORT;
|
|
|
|
mutex_lock(&lock);
|
|
if (cma_any_port(cma_src_addr(id_priv)))
|
|
ret = cma_alloc_any_port(ps, id_priv);
|
|
else
|
|
ret = cma_use_port(ps, id_priv);
|
|
mutex_unlock(&lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
|
|
struct sockaddr *addr)
|
|
{
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
if (addr->sa_family != AF_INET6)
|
|
return 0;
|
|
|
|
sin6 = (struct sockaddr_in6 *) addr;
|
|
|
|
if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
|
|
return 0;
|
|
|
|
if (!sin6->sin6_scope_id)
|
|
return -EINVAL;
|
|
|
|
dev_addr->bound_dev_if = sin6->sin6_scope_id;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int rdma_listen(struct rdma_cm_id *id, int backlog)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (id_priv->state == RDMA_CM_IDLE) {
|
|
id->route.addr.src_addr.ss_family = AF_INET;
|
|
ret = rdma_bind_addr(id, cma_src_addr(id_priv));
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
|
|
return -EINVAL;
|
|
|
|
if (id_priv->reuseaddr) {
|
|
ret = cma_bind_listen(id_priv);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
id_priv->backlog = backlog;
|
|
if (id->device) {
|
|
if (rdma_cap_ib_cm(id->device, 1)) {
|
|
ret = cma_ib_listen(id_priv);
|
|
if (ret)
|
|
goto err;
|
|
} else if (rdma_cap_iw_cm(id->device, 1)) {
|
|
ret = cma_iw_listen(id_priv, backlog);
|
|
if (ret)
|
|
goto err;
|
|
} else {
|
|
ret = -ENOSYS;
|
|
goto err;
|
|
}
|
|
} else
|
|
cma_listen_on_all(id_priv);
|
|
|
|
return 0;
|
|
err:
|
|
id_priv->backlog = 0;
|
|
cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_listen);
|
|
|
|
int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
struct sockaddr *daddr;
|
|
|
|
if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
|
|
addr->sa_family != AF_IB)
|
|
return -EAFNOSUPPORT;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
|
|
return -EINVAL;
|
|
|
|
ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
|
|
if (ret)
|
|
goto err1;
|
|
|
|
memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
|
|
if (!cma_any_addr(addr)) {
|
|
ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
|
|
if (ret)
|
|
goto err1;
|
|
|
|
ret = cma_acquire_dev_by_src_ip(id_priv);
|
|
if (ret)
|
|
goto err1;
|
|
}
|
|
|
|
if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
|
|
if (addr->sa_family == AF_INET)
|
|
id_priv->afonly = 1;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
else if (addr->sa_family == AF_INET6) {
|
|
struct net *net = id_priv->id.route.addr.dev_addr.net;
|
|
|
|
id_priv->afonly = net->ipv6.sysctl.bindv6only;
|
|
}
|
|
#endif
|
|
}
|
|
daddr = cma_dst_addr(id_priv);
|
|
daddr->sa_family = addr->sa_family;
|
|
|
|
ret = cma_get_port(id_priv);
|
|
if (ret)
|
|
goto err2;
|
|
|
|
return 0;
|
|
err2:
|
|
rdma_restrack_del(&id_priv->res);
|
|
if (id_priv->cma_dev)
|
|
cma_release_dev(id_priv);
|
|
err1:
|
|
cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_bind_addr);
|
|
|
|
static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_hdr *cma_hdr;
|
|
|
|
cma_hdr = hdr;
|
|
cma_hdr->cma_version = CMA_VERSION;
|
|
if (cma_family(id_priv) == AF_INET) {
|
|
struct sockaddr_in *src4, *dst4;
|
|
|
|
src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
|
|
dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
|
|
|
|
cma_set_ip_ver(cma_hdr, 4);
|
|
cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
|
|
cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
|
|
cma_hdr->port = src4->sin_port;
|
|
} else if (cma_family(id_priv) == AF_INET6) {
|
|
struct sockaddr_in6 *src6, *dst6;
|
|
|
|
src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
|
|
dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
|
|
|
|
cma_set_ip_ver(cma_hdr, 6);
|
|
cma_hdr->src_addr.ip6 = src6->sin6_addr;
|
|
cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
|
|
cma_hdr->port = src6->sin6_port;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
|
|
const struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *id_priv = cm_id->context;
|
|
struct rdma_cm_event event = {};
|
|
const struct ib_cm_sidr_rep_event_param *rep =
|
|
&ib_event->param.sidr_rep_rcvd;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (id_priv->state != RDMA_CM_CONNECT)
|
|
goto out;
|
|
|
|
switch (ib_event->event) {
|
|
case IB_CM_SIDR_REQ_ERROR:
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = -ETIMEDOUT;
|
|
break;
|
|
case IB_CM_SIDR_REP_RECEIVED:
|
|
event.param.ud.private_data = ib_event->private_data;
|
|
event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
|
|
if (rep->status != IB_SIDR_SUCCESS) {
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = ib_event->param.sidr_rep_rcvd.status;
|
|
pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
|
|
event.status);
|
|
break;
|
|
}
|
|
ret = cma_set_qkey(id_priv, rep->qkey);
|
|
if (ret) {
|
|
pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
|
|
event.event = RDMA_CM_EVENT_ADDR_ERROR;
|
|
event.status = ret;
|
|
break;
|
|
}
|
|
ib_init_ah_attr_from_path(id_priv->id.device,
|
|
id_priv->id.port_num,
|
|
id_priv->id.route.path_rec,
|
|
&event.param.ud.ah_attr,
|
|
rep->sgid_attr);
|
|
event.param.ud.qp_num = rep->qpn;
|
|
event.param.ud.qkey = rep->qkey;
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
event.status = 0;
|
|
break;
|
|
default:
|
|
pr_err("RDMA CMA: unexpected IB CM event: %d\n",
|
|
ib_event->event);
|
|
goto out;
|
|
}
|
|
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
|
|
rdma_destroy_ah_attr(&event.param.ud.ah_attr);
|
|
if (ret) {
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
id_priv->cm_id.ib = NULL;
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_cm_sidr_req_param req;
|
|
struct ib_cm_id *id;
|
|
void *private_data;
|
|
u8 offset;
|
|
int ret;
|
|
|
|
memset(&req, 0, sizeof req);
|
|
offset = cma_user_data_offset(id_priv);
|
|
req.private_data_len = offset + conn_param->private_data_len;
|
|
if (req.private_data_len < conn_param->private_data_len)
|
|
return -EINVAL;
|
|
|
|
if (req.private_data_len) {
|
|
private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
|
|
if (!private_data)
|
|
return -ENOMEM;
|
|
} else {
|
|
private_data = NULL;
|
|
}
|
|
|
|
if (conn_param->private_data && conn_param->private_data_len)
|
|
memcpy(private_data + offset, conn_param->private_data,
|
|
conn_param->private_data_len);
|
|
|
|
if (private_data) {
|
|
ret = cma_format_hdr(private_data, id_priv);
|
|
if (ret)
|
|
goto out;
|
|
req.private_data = private_data;
|
|
}
|
|
|
|
id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
|
|
id_priv);
|
|
if (IS_ERR(id)) {
|
|
ret = PTR_ERR(id);
|
|
goto out;
|
|
}
|
|
id_priv->cm_id.ib = id;
|
|
|
|
req.path = id_priv->id.route.path_rec;
|
|
req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
|
|
req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
|
|
req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
|
|
req.max_cm_retries = CMA_MAX_CM_RETRIES;
|
|
|
|
ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
|
|
if (ret) {
|
|
ib_destroy_cm_id(id_priv->cm_id.ib);
|
|
id_priv->cm_id.ib = NULL;
|
|
}
|
|
out:
|
|
kfree(private_data);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_connect_ib(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_cm_req_param req;
|
|
struct rdma_route *route;
|
|
void *private_data;
|
|
struct ib_cm_id *id;
|
|
u8 offset;
|
|
int ret;
|
|
|
|
memset(&req, 0, sizeof req);
|
|
offset = cma_user_data_offset(id_priv);
|
|
req.private_data_len = offset + conn_param->private_data_len;
|
|
if (req.private_data_len < conn_param->private_data_len)
|
|
return -EINVAL;
|
|
|
|
if (req.private_data_len) {
|
|
private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
|
|
if (!private_data)
|
|
return -ENOMEM;
|
|
} else {
|
|
private_data = NULL;
|
|
}
|
|
|
|
if (conn_param->private_data && conn_param->private_data_len)
|
|
memcpy(private_data + offset, conn_param->private_data,
|
|
conn_param->private_data_len);
|
|
|
|
id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
|
|
if (IS_ERR(id)) {
|
|
ret = PTR_ERR(id);
|
|
goto out;
|
|
}
|
|
id_priv->cm_id.ib = id;
|
|
|
|
route = &id_priv->id.route;
|
|
if (private_data) {
|
|
ret = cma_format_hdr(private_data, id_priv);
|
|
if (ret)
|
|
goto out;
|
|
req.private_data = private_data;
|
|
}
|
|
|
|
req.primary_path = &route->path_rec[0];
|
|
if (route->num_paths == 2)
|
|
req.alternate_path = &route->path_rec[1];
|
|
|
|
req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
|
|
/* Alternate path SGID attribute currently unsupported */
|
|
req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
|
|
req.qp_num = id_priv->qp_num;
|
|
req.qp_type = id_priv->id.qp_type;
|
|
req.starting_psn = id_priv->seq_num;
|
|
req.responder_resources = conn_param->responder_resources;
|
|
req.initiator_depth = conn_param->initiator_depth;
|
|
req.flow_control = conn_param->flow_control;
|
|
req.retry_count = min_t(u8, 7, conn_param->retry_count);
|
|
req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
|
|
req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
|
|
req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
|
|
req.max_cm_retries = CMA_MAX_CM_RETRIES;
|
|
req.srq = id_priv->srq ? 1 : 0;
|
|
|
|
ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
|
|
out:
|
|
if (ret && !IS_ERR(id)) {
|
|
ib_destroy_cm_id(id);
|
|
id_priv->cm_id.ib = NULL;
|
|
}
|
|
|
|
kfree(private_data);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_connect_iw(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct iw_cm_id *cm_id;
|
|
int ret;
|
|
struct iw_cm_conn_param iw_param;
|
|
|
|
cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
|
|
if (IS_ERR(cm_id))
|
|
return PTR_ERR(cm_id);
|
|
|
|
cm_id->tos = id_priv->tos;
|
|
id_priv->cm_id.iw = cm_id;
|
|
|
|
memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
|
|
rdma_addr_size(cma_src_addr(id_priv)));
|
|
memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
|
|
rdma_addr_size(cma_dst_addr(id_priv)));
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, conn_param);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (conn_param) {
|
|
iw_param.ord = conn_param->initiator_depth;
|
|
iw_param.ird = conn_param->responder_resources;
|
|
iw_param.private_data = conn_param->private_data;
|
|
iw_param.private_data_len = conn_param->private_data_len;
|
|
iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
|
|
} else {
|
|
memset(&iw_param, 0, sizeof iw_param);
|
|
iw_param.qpn = id_priv->qp_num;
|
|
}
|
|
ret = iw_cm_connect(cm_id, &iw_param);
|
|
out:
|
|
if (ret) {
|
|
iw_destroy_cm_id(cm_id);
|
|
id_priv->cm_id.iw = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
|
|
return -EINVAL;
|
|
|
|
if (!id->qp) {
|
|
id_priv->qp_num = conn_param->qp_num;
|
|
id_priv->srq = conn_param->srq;
|
|
}
|
|
|
|
if (rdma_cap_ib_cm(id->device, id->port_num)) {
|
|
if (id->qp_type == IB_QPT_UD)
|
|
ret = cma_resolve_ib_udp(id_priv, conn_param);
|
|
else
|
|
ret = cma_connect_ib(id_priv, conn_param);
|
|
} else if (rdma_cap_iw_cm(id->device, id->port_num))
|
|
ret = cma_connect_iw(id_priv, conn_param);
|
|
else
|
|
ret = -ENOSYS;
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_connect);
|
|
|
|
static int cma_accept_ib(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_cm_rep_param rep;
|
|
int ret;
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, conn_param);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = cma_modify_qp_rts(id_priv, conn_param);
|
|
if (ret)
|
|
goto out;
|
|
|
|
memset(&rep, 0, sizeof rep);
|
|
rep.qp_num = id_priv->qp_num;
|
|
rep.starting_psn = id_priv->seq_num;
|
|
rep.private_data = conn_param->private_data;
|
|
rep.private_data_len = conn_param->private_data_len;
|
|
rep.responder_resources = conn_param->responder_resources;
|
|
rep.initiator_depth = conn_param->initiator_depth;
|
|
rep.failover_accepted = 0;
|
|
rep.flow_control = conn_param->flow_control;
|
|
rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
|
|
rep.srq = id_priv->srq ? 1 : 0;
|
|
|
|
ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int cma_accept_iw(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct iw_cm_conn_param iw_param;
|
|
int ret;
|
|
|
|
if (!conn_param)
|
|
return -EINVAL;
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, conn_param);
|
|
if (ret)
|
|
return ret;
|
|
|
|
iw_param.ord = conn_param->initiator_depth;
|
|
iw_param.ird = conn_param->responder_resources;
|
|
iw_param.private_data = conn_param->private_data;
|
|
iw_param.private_data_len = conn_param->private_data_len;
|
|
if (id_priv->id.qp) {
|
|
iw_param.qpn = id_priv->qp_num;
|
|
} else
|
|
iw_param.qpn = conn_param->qp_num;
|
|
|
|
return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
|
|
}
|
|
|
|
static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
|
|
enum ib_cm_sidr_status status, u32 qkey,
|
|
const void *private_data, int private_data_len)
|
|
{
|
|
struct ib_cm_sidr_rep_param rep;
|
|
int ret;
|
|
|
|
memset(&rep, 0, sizeof rep);
|
|
rep.status = status;
|
|
if (status == IB_SIDR_SUCCESS) {
|
|
ret = cma_set_qkey(id_priv, qkey);
|
|
if (ret)
|
|
return ret;
|
|
rep.qp_num = id_priv->qp_num;
|
|
rep.qkey = id_priv->qkey;
|
|
}
|
|
rep.private_data = private_data;
|
|
rep.private_data_len = private_data_len;
|
|
|
|
return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
|
|
}
|
|
|
|
int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
|
|
const char *caller)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
|
|
rdma_restrack_set_task(&id_priv->res, caller);
|
|
|
|
if (!cma_comp(id_priv, RDMA_CM_CONNECT))
|
|
return -EINVAL;
|
|
|
|
if (!id->qp && conn_param) {
|
|
id_priv->qp_num = conn_param->qp_num;
|
|
id_priv->srq = conn_param->srq;
|
|
}
|
|
|
|
if (rdma_cap_ib_cm(id->device, id->port_num)) {
|
|
if (id->qp_type == IB_QPT_UD) {
|
|
if (conn_param)
|
|
ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
|
|
conn_param->qkey,
|
|
conn_param->private_data,
|
|
conn_param->private_data_len);
|
|
else
|
|
ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
|
|
0, NULL, 0);
|
|
} else {
|
|
if (conn_param)
|
|
ret = cma_accept_ib(id_priv, conn_param);
|
|
else
|
|
ret = cma_rep_recv(id_priv);
|
|
}
|
|
} else if (rdma_cap_iw_cm(id->device, id->port_num))
|
|
ret = cma_accept_iw(id_priv, conn_param);
|
|
else
|
|
ret = -ENOSYS;
|
|
|
|
if (ret)
|
|
goto reject;
|
|
|
|
return 0;
|
|
reject:
|
|
cma_modify_qp_err(id_priv);
|
|
rdma_reject(id, NULL, 0);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(__rdma_accept);
|
|
|
|
int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!id_priv->cm_id.ib)
|
|
return -EINVAL;
|
|
|
|
switch (id->device->node_type) {
|
|
case RDMA_NODE_IB_CA:
|
|
ret = ib_cm_notify(id_priv->cm_id.ib, event);
|
|
break;
|
|
default:
|
|
ret = 0;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_notify);
|
|
|
|
int rdma_reject(struct rdma_cm_id *id, const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!id_priv->cm_id.ib)
|
|
return -EINVAL;
|
|
|
|
if (rdma_cap_ib_cm(id->device, id->port_num)) {
|
|
if (id->qp_type == IB_QPT_UD)
|
|
ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
|
|
private_data, private_data_len);
|
|
else
|
|
ret = ib_send_cm_rej(id_priv->cm_id.ib,
|
|
IB_CM_REJ_CONSUMER_DEFINED, NULL,
|
|
0, private_data, private_data_len);
|
|
} else if (rdma_cap_iw_cm(id->device, id->port_num)) {
|
|
ret = iw_cm_reject(id_priv->cm_id.iw,
|
|
private_data, private_data_len);
|
|
} else
|
|
ret = -ENOSYS;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_reject);
|
|
|
|
int rdma_disconnect(struct rdma_cm_id *id)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!id_priv->cm_id.ib)
|
|
return -EINVAL;
|
|
|
|
if (rdma_cap_ib_cm(id->device, id->port_num)) {
|
|
ret = cma_modify_qp_err(id_priv);
|
|
if (ret)
|
|
goto out;
|
|
/* Initiate or respond to a disconnect. */
|
|
if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
|
|
ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
|
|
} else if (rdma_cap_iw_cm(id->device, id->port_num)) {
|
|
ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
|
|
} else
|
|
ret = -EINVAL;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_disconnect);
|
|
|
|
static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct cma_multicast *mc = multicast->context;
|
|
struct rdma_cm_event event = {};
|
|
int ret = 0;
|
|
|
|
id_priv = mc->id_priv;
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (id_priv->state != RDMA_CM_ADDR_BOUND &&
|
|
id_priv->state != RDMA_CM_ADDR_RESOLVED)
|
|
goto out;
|
|
|
|
if (!status)
|
|
status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
|
|
else
|
|
pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
|
|
status);
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!status && id_priv->id.qp) {
|
|
status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
|
|
be16_to_cpu(multicast->rec.mlid));
|
|
if (status)
|
|
pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
|
|
status);
|
|
}
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
|
|
event.status = status;
|
|
event.param.ud.private_data = mc->context;
|
|
if (!status) {
|
|
struct rdma_dev_addr *dev_addr =
|
|
&id_priv->id.route.addr.dev_addr;
|
|
struct net_device *ndev =
|
|
dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
|
|
enum ib_gid_type gid_type =
|
|
id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
|
|
rdma_start_port(id_priv->cma_dev->device)];
|
|
|
|
event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
|
|
ret = ib_init_ah_from_mcmember(id_priv->id.device,
|
|
id_priv->id.port_num,
|
|
&multicast->rec,
|
|
ndev, gid_type,
|
|
&event.param.ud.ah_attr);
|
|
if (ret)
|
|
event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
|
|
|
|
event.param.ud.qp_num = 0xFFFFFF;
|
|
event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
|
|
if (ndev)
|
|
dev_put(ndev);
|
|
} else
|
|
event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
|
|
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
|
|
rdma_destroy_ah_attr(&event.param.ud.ah_attr);
|
|
if (ret) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return 0;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static void cma_set_mgid(struct rdma_id_private *id_priv,
|
|
struct sockaddr *addr, union ib_gid *mgid)
|
|
{
|
|
unsigned char mc_map[MAX_ADDR_LEN];
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
struct sockaddr_in *sin = (struct sockaddr_in *) addr;
|
|
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
|
|
|
|
if (cma_any_addr(addr)) {
|
|
memset(mgid, 0, sizeof *mgid);
|
|
} else if ((addr->sa_family == AF_INET6) &&
|
|
((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
|
|
0xFF10A01B)) {
|
|
/* IPv6 address is an SA assigned MGID. */
|
|
memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
|
|
} else if (addr->sa_family == AF_IB) {
|
|
memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
|
|
} else if (addr->sa_family == AF_INET6) {
|
|
ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
mc_map[7] = 0x01; /* Use RDMA CM signature */
|
|
*mgid = *(union ib_gid *) (mc_map + 4);
|
|
} else {
|
|
ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
mc_map[7] = 0x01; /* Use RDMA CM signature */
|
|
*mgid = *(union ib_gid *) (mc_map + 4);
|
|
}
|
|
}
|
|
|
|
static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
|
|
struct cma_multicast *mc)
|
|
{
|
|
struct ib_sa_mcmember_rec rec;
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
ib_sa_comp_mask comp_mask;
|
|
int ret;
|
|
|
|
ib_addr_get_mgid(dev_addr, &rec.mgid);
|
|
ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
|
|
&rec.mgid, &rec);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = cma_set_qkey(id_priv, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
|
|
rec.qkey = cpu_to_be32(id_priv->qkey);
|
|
rdma_addr_get_sgid(dev_addr, &rec.port_gid);
|
|
rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
|
|
rec.join_state = mc->join_state;
|
|
|
|
if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
|
|
(!ib_sa_sendonly_fullmem_support(&sa_client,
|
|
id_priv->id.device,
|
|
id_priv->id.port_num))) {
|
|
dev_warn(
|
|
&id_priv->id.device->dev,
|
|
"RDMA CM: port %u Unable to multicast join: SM doesn't support Send Only Full Member option\n",
|
|
id_priv->id.port_num);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
|
|
IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
|
|
IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
|
|
IB_SA_MCMEMBER_REC_FLOW_LABEL |
|
|
IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
|
|
|
|
if (id_priv->id.ps == RDMA_PS_IPOIB)
|
|
comp_mask |= IB_SA_MCMEMBER_REC_RATE |
|
|
IB_SA_MCMEMBER_REC_RATE_SELECTOR |
|
|
IB_SA_MCMEMBER_REC_MTU_SELECTOR |
|
|
IB_SA_MCMEMBER_REC_MTU |
|
|
IB_SA_MCMEMBER_REC_HOP_LIMIT;
|
|
|
|
mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
|
|
id_priv->id.port_num, &rec,
|
|
comp_mask, GFP_KERNEL,
|
|
cma_ib_mc_handler, mc);
|
|
return PTR_ERR_OR_ZERO(mc->multicast.ib);
|
|
}
|
|
|
|
static void iboe_mcast_work_handler(struct work_struct *work)
|
|
{
|
|
struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
|
|
struct cma_multicast *mc = mw->mc;
|
|
struct ib_sa_multicast *m = mc->multicast.ib;
|
|
|
|
mc->multicast.ib->context = mc;
|
|
cma_ib_mc_handler(0, m);
|
|
kref_put(&mc->mcref, release_mc);
|
|
kfree(mw);
|
|
}
|
|
|
|
static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
|
|
enum ib_gid_type gid_type)
|
|
{
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)addr;
|
|
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
|
|
|
|
if (cma_any_addr(addr)) {
|
|
memset(mgid, 0, sizeof *mgid);
|
|
} else if (addr->sa_family == AF_INET6) {
|
|
memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
|
|
} else {
|
|
mgid->raw[0] =
|
|
(gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
|
|
mgid->raw[1] =
|
|
(gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
|
|
mgid->raw[2] = 0;
|
|
mgid->raw[3] = 0;
|
|
mgid->raw[4] = 0;
|
|
mgid->raw[5] = 0;
|
|
mgid->raw[6] = 0;
|
|
mgid->raw[7] = 0;
|
|
mgid->raw[8] = 0;
|
|
mgid->raw[9] = 0;
|
|
mgid->raw[10] = 0xff;
|
|
mgid->raw[11] = 0xff;
|
|
*(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
|
|
}
|
|
}
|
|
|
|
static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
|
|
struct cma_multicast *mc)
|
|
{
|
|
struct iboe_mcast_work *work;
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
int err = 0;
|
|
struct sockaddr *addr = (struct sockaddr *)&mc->addr;
|
|
struct net_device *ndev = NULL;
|
|
enum ib_gid_type gid_type;
|
|
bool send_only;
|
|
|
|
send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
|
|
|
|
if (cma_zero_addr((struct sockaddr *)&mc->addr))
|
|
return -EINVAL;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
|
|
if (!mc->multicast.ib) {
|
|
err = -ENOMEM;
|
|
goto out1;
|
|
}
|
|
|
|
gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
|
|
rdma_start_port(id_priv->cma_dev->device)];
|
|
cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
|
|
|
|
mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
|
|
|
|
if (dev_addr->bound_dev_if)
|
|
ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
|
|
if (!ndev) {
|
|
err = -ENODEV;
|
|
goto out2;
|
|
}
|
|
mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
|
|
mc->multicast.ib->rec.hop_limit = 1;
|
|
mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
|
|
|
|
if (addr->sa_family == AF_INET) {
|
|
if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
|
|
mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
|
|
if (!send_only) {
|
|
err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
|
|
true);
|
|
}
|
|
}
|
|
} else {
|
|
if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
|
|
err = -ENOTSUPP;
|
|
}
|
|
dev_put(ndev);
|
|
if (err || !mc->multicast.ib->rec.mtu) {
|
|
if (!err)
|
|
err = -EINVAL;
|
|
goto out2;
|
|
}
|
|
rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
|
|
&mc->multicast.ib->rec.port_gid);
|
|
work->id = id_priv;
|
|
work->mc = mc;
|
|
INIT_WORK(&work->work, iboe_mcast_work_handler);
|
|
kref_get(&mc->mcref);
|
|
queue_work(cma_wq, &work->work);
|
|
|
|
return 0;
|
|
|
|
out2:
|
|
kfree(mc->multicast.ib);
|
|
out1:
|
|
kfree(work);
|
|
return err;
|
|
}
|
|
|
|
int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
|
|
u8 join_state, void *context)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct cma_multicast *mc;
|
|
int ret;
|
|
|
|
if (!id->device)
|
|
return -EINVAL;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
|
|
!cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
|
|
return -EINVAL;
|
|
|
|
mc = kmalloc(sizeof *mc, GFP_KERNEL);
|
|
if (!mc)
|
|
return -ENOMEM;
|
|
|
|
memcpy(&mc->addr, addr, rdma_addr_size(addr));
|
|
mc->context = context;
|
|
mc->id_priv = id_priv;
|
|
mc->join_state = join_state;
|
|
|
|
if (rdma_protocol_roce(id->device, id->port_num)) {
|
|
kref_init(&mc->mcref);
|
|
ret = cma_iboe_join_multicast(id_priv, mc);
|
|
if (ret)
|
|
goto out_err;
|
|
} else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
|
|
ret = cma_join_ib_multicast(id_priv, mc);
|
|
if (ret)
|
|
goto out_err;
|
|
} else {
|
|
ret = -ENOSYS;
|
|
goto out_err;
|
|
}
|
|
|
|
spin_lock(&id_priv->lock);
|
|
list_add(&mc->list, &id_priv->mc_list);
|
|
spin_unlock(&id_priv->lock);
|
|
|
|
return 0;
|
|
out_err:
|
|
kfree(mc);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_join_multicast);
|
|
|
|
void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct cma_multicast *mc;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
spin_lock_irq(&id_priv->lock);
|
|
list_for_each_entry(mc, &id_priv->mc_list, list) {
|
|
if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
|
|
list_del(&mc->list);
|
|
spin_unlock_irq(&id_priv->lock);
|
|
|
|
if (id->qp)
|
|
ib_detach_mcast(id->qp,
|
|
&mc->multicast.ib->rec.mgid,
|
|
be16_to_cpu(mc->multicast.ib->rec.mlid));
|
|
|
|
BUG_ON(id_priv->cma_dev->device != id->device);
|
|
|
|
if (rdma_cap_ib_mcast(id->device, id->port_num)) {
|
|
ib_sa_free_multicast(mc->multicast.ib);
|
|
kfree(mc);
|
|
} else if (rdma_protocol_roce(id->device, id->port_num)) {
|
|
cma_leave_roce_mc_group(id_priv, mc);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
spin_unlock_irq(&id_priv->lock);
|
|
}
|
|
EXPORT_SYMBOL(rdma_leave_multicast);
|
|
|
|
static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_dev_addr *dev_addr;
|
|
struct cma_ndev_work *work;
|
|
|
|
dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
|
|
if ((dev_addr->bound_dev_if == ndev->ifindex) &&
|
|
(net_eq(dev_net(ndev), dev_addr->net)) &&
|
|
memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
|
|
pr_info("RDMA CM addr change for ndev %s used by id %p\n",
|
|
ndev->name, &id_priv->id);
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
INIT_WORK(&work->work, cma_ndev_work_handler);
|
|
work->id = id_priv;
|
|
work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
|
|
atomic_inc(&id_priv->refcount);
|
|
queue_work(cma_wq, &work->work);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
|
|
void *ptr)
|
|
{
|
|
struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
|
|
struct cma_device *cma_dev;
|
|
struct rdma_id_private *id_priv;
|
|
int ret = NOTIFY_DONE;
|
|
|
|
if (event != NETDEV_BONDING_FAILOVER)
|
|
return NOTIFY_DONE;
|
|
|
|
if (!netif_is_bond_master(ndev))
|
|
return NOTIFY_DONE;
|
|
|
|
mutex_lock(&lock);
|
|
list_for_each_entry(cma_dev, &dev_list, list)
|
|
list_for_each_entry(id_priv, &cma_dev->id_list, list) {
|
|
ret = cma_netdev_change(ndev, id_priv);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
static struct notifier_block cma_nb = {
|
|
.notifier_call = cma_netdev_callback
|
|
};
|
|
|
|
static void cma_add_one(struct ib_device *device)
|
|
{
|
|
struct cma_device *cma_dev;
|
|
struct rdma_id_private *id_priv;
|
|
unsigned int i;
|
|
unsigned long supported_gids = 0;
|
|
|
|
cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
|
|
if (!cma_dev)
|
|
return;
|
|
|
|
cma_dev->device = device;
|
|
cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
|
|
sizeof(*cma_dev->default_gid_type),
|
|
GFP_KERNEL);
|
|
if (!cma_dev->default_gid_type)
|
|
goto free_cma_dev;
|
|
|
|
cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
|
|
sizeof(*cma_dev->default_roce_tos),
|
|
GFP_KERNEL);
|
|
if (!cma_dev->default_roce_tos)
|
|
goto free_gid_type;
|
|
|
|
for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
|
|
supported_gids = roce_gid_type_mask_support(device, i);
|
|
WARN_ON(!supported_gids);
|
|
if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
|
|
cma_dev->default_gid_type[i - rdma_start_port(device)] =
|
|
CMA_PREFERRED_ROCE_GID_TYPE;
|
|
else
|
|
cma_dev->default_gid_type[i - rdma_start_port(device)] =
|
|
find_first_bit(&supported_gids, BITS_PER_LONG);
|
|
cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
|
|
}
|
|
|
|
init_completion(&cma_dev->comp);
|
|
atomic_set(&cma_dev->refcount, 1);
|
|
INIT_LIST_HEAD(&cma_dev->id_list);
|
|
ib_set_client_data(device, &cma_client, cma_dev);
|
|
|
|
mutex_lock(&lock);
|
|
list_add_tail(&cma_dev->list, &dev_list);
|
|
list_for_each_entry(id_priv, &listen_any_list, list)
|
|
cma_listen_on_dev(id_priv, cma_dev);
|
|
mutex_unlock(&lock);
|
|
|
|
return;
|
|
|
|
free_gid_type:
|
|
kfree(cma_dev->default_gid_type);
|
|
|
|
free_cma_dev:
|
|
kfree(cma_dev);
|
|
|
|
return;
|
|
}
|
|
|
|
static int cma_remove_id_dev(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_cm_event event = {};
|
|
enum rdma_cm_state state;
|
|
int ret = 0;
|
|
|
|
/* Record that we want to remove the device */
|
|
state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
|
|
if (state == RDMA_CM_DESTROYING)
|
|
return 0;
|
|
|
|
cma_cancel_operation(id_priv, state);
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
|
|
/* Check for destruction from another callback. */
|
|
if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
|
|
goto out;
|
|
|
|
event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static void cma_process_remove(struct cma_device *cma_dev)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
mutex_lock(&lock);
|
|
while (!list_empty(&cma_dev->id_list)) {
|
|
id_priv = list_entry(cma_dev->id_list.next,
|
|
struct rdma_id_private, list);
|
|
|
|
list_del(&id_priv->listen_list);
|
|
list_del_init(&id_priv->list);
|
|
atomic_inc(&id_priv->refcount);
|
|
mutex_unlock(&lock);
|
|
|
|
ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
|
|
cma_deref_id(id_priv);
|
|
if (ret)
|
|
rdma_destroy_id(&id_priv->id);
|
|
|
|
mutex_lock(&lock);
|
|
}
|
|
mutex_unlock(&lock);
|
|
|
|
cma_deref_dev(cma_dev);
|
|
wait_for_completion(&cma_dev->comp);
|
|
}
|
|
|
|
static void cma_remove_one(struct ib_device *device, void *client_data)
|
|
{
|
|
struct cma_device *cma_dev = client_data;
|
|
|
|
if (!cma_dev)
|
|
return;
|
|
|
|
mutex_lock(&lock);
|
|
list_del(&cma_dev->list);
|
|
mutex_unlock(&lock);
|
|
|
|
cma_process_remove(cma_dev);
|
|
kfree(cma_dev->default_roce_tos);
|
|
kfree(cma_dev->default_gid_type);
|
|
kfree(cma_dev);
|
|
}
|
|
|
|
static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct rdma_cm_id_stats *id_stats;
|
|
struct rdma_id_private *id_priv;
|
|
struct rdma_cm_id *id = NULL;
|
|
struct cma_device *cma_dev;
|
|
int i_dev = 0, i_id = 0;
|
|
|
|
/*
|
|
* We export all of the IDs as a sequence of messages. Each
|
|
* ID gets its own netlink message.
|
|
*/
|
|
mutex_lock(&lock);
|
|
|
|
list_for_each_entry(cma_dev, &dev_list, list) {
|
|
if (i_dev < cb->args[0]) {
|
|
i_dev++;
|
|
continue;
|
|
}
|
|
|
|
i_id = 0;
|
|
list_for_each_entry(id_priv, &cma_dev->id_list, list) {
|
|
if (i_id < cb->args[1]) {
|
|
i_id++;
|
|
continue;
|
|
}
|
|
|
|
id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
|
|
sizeof *id_stats, RDMA_NL_RDMA_CM,
|
|
RDMA_NL_RDMA_CM_ID_STATS,
|
|
NLM_F_MULTI);
|
|
if (!id_stats)
|
|
goto out;
|
|
|
|
memset(id_stats, 0, sizeof *id_stats);
|
|
id = &id_priv->id;
|
|
id_stats->node_type = id->route.addr.dev_addr.dev_type;
|
|
id_stats->port_num = id->port_num;
|
|
id_stats->bound_dev_if =
|
|
id->route.addr.dev_addr.bound_dev_if;
|
|
|
|
if (ibnl_put_attr(skb, nlh,
|
|
rdma_addr_size(cma_src_addr(id_priv)),
|
|
cma_src_addr(id_priv),
|
|
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
|
|
goto out;
|
|
if (ibnl_put_attr(skb, nlh,
|
|
rdma_addr_size(cma_dst_addr(id_priv)),
|
|
cma_dst_addr(id_priv),
|
|
RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
|
|
goto out;
|
|
|
|
id_stats->pid = task_pid_vnr(id_priv->res.task);
|
|
id_stats->port_space = id->ps;
|
|
id_stats->cm_state = id_priv->state;
|
|
id_stats->qp_num = id_priv->qp_num;
|
|
id_stats->qp_type = id->qp_type;
|
|
|
|
i_id++;
|
|
nlmsg_end(skb, nlh);
|
|
}
|
|
|
|
cb->args[1] = 0;
|
|
i_dev++;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&lock);
|
|
cb->args[0] = i_dev;
|
|
cb->args[1] = i_id;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
static const struct rdma_nl_cbs cma_cb_table[RDMA_NL_RDMA_CM_NUM_OPS] = {
|
|
[RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats},
|
|
};
|
|
|
|
static int cma_init_net(struct net *net)
|
|
{
|
|
struct cma_pernet *pernet = cma_pernet(net);
|
|
|
|
idr_init(&pernet->tcp_ps);
|
|
idr_init(&pernet->udp_ps);
|
|
idr_init(&pernet->ipoib_ps);
|
|
idr_init(&pernet->ib_ps);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cma_exit_net(struct net *net)
|
|
{
|
|
struct cma_pernet *pernet = cma_pernet(net);
|
|
|
|
idr_destroy(&pernet->tcp_ps);
|
|
idr_destroy(&pernet->udp_ps);
|
|
idr_destroy(&pernet->ipoib_ps);
|
|
idr_destroy(&pernet->ib_ps);
|
|
}
|
|
|
|
static struct pernet_operations cma_pernet_operations = {
|
|
.init = cma_init_net,
|
|
.exit = cma_exit_net,
|
|
.id = &cma_pernet_id,
|
|
.size = sizeof(struct cma_pernet),
|
|
};
|
|
|
|
static int __init cma_init(void)
|
|
{
|
|
int ret;
|
|
|
|
cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
|
|
if (!cma_wq)
|
|
return -ENOMEM;
|
|
|
|
ret = register_pernet_subsys(&cma_pernet_operations);
|
|
if (ret)
|
|
goto err_wq;
|
|
|
|
ib_sa_register_client(&sa_client);
|
|
register_netdevice_notifier(&cma_nb);
|
|
|
|
ret = ib_register_client(&cma_client);
|
|
if (ret)
|
|
goto err;
|
|
|
|
rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table);
|
|
cma_configfs_init();
|
|
|
|
return 0;
|
|
|
|
err:
|
|
unregister_netdevice_notifier(&cma_nb);
|
|
ib_sa_unregister_client(&sa_client);
|
|
err_wq:
|
|
destroy_workqueue(cma_wq);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit cma_cleanup(void)
|
|
{
|
|
cma_configfs_exit();
|
|
rdma_nl_unregister(RDMA_NL_RDMA_CM);
|
|
ib_unregister_client(&cma_client);
|
|
unregister_netdevice_notifier(&cma_nb);
|
|
ib_sa_unregister_client(&sa_client);
|
|
unregister_pernet_subsys(&cma_pernet_operations);
|
|
destroy_workqueue(cma_wq);
|
|
}
|
|
|
|
MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1);
|
|
|
|
module_init(cma_init);
|
|
module_exit(cma_cleanup);
|