1e51060f0SSean Hefty /* 2e51060f0SSean Hefty * Copyright (c) 2005 Voltaire Inc. All rights reserved. 3e51060f0SSean Hefty * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. 4e51060f0SSean Hefty * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. 5e51060f0SSean Hefty * Copyright (c) 2005-2006 Intel Corporation. All rights reserved. 6e51060f0SSean Hefty * 7a9474917SSean Hefty * This software is available to you under a choice of one of two 8a9474917SSean Hefty * licenses. You may choose to be licensed under the terms of the GNU 9a9474917SSean Hefty * General Public License (GPL) Version 2, available from the file 10a9474917SSean Hefty * COPYING in the main directory of this source tree, or the 11a9474917SSean Hefty * OpenIB.org BSD license below: 12e51060f0SSean Hefty * 13a9474917SSean Hefty * Redistribution and use in source and binary forms, with or 14a9474917SSean Hefty * without modification, are permitted provided that the following 15a9474917SSean Hefty * conditions are met: 16e51060f0SSean Hefty * 17a9474917SSean Hefty * - Redistributions of source code must retain the above 18a9474917SSean Hefty * copyright notice, this list of conditions and the following 19a9474917SSean Hefty * disclaimer. 20e51060f0SSean Hefty * 21a9474917SSean Hefty * - Redistributions in binary form must reproduce the above 22a9474917SSean Hefty * copyright notice, this list of conditions and the following 23a9474917SSean Hefty * disclaimer in the documentation and/or other materials 24a9474917SSean Hefty * provided with the distribution. 25e51060f0SSean Hefty * 26a9474917SSean Hefty * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27a9474917SSean Hefty * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28a9474917SSean Hefty * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29a9474917SSean Hefty * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30a9474917SSean Hefty * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31a9474917SSean Hefty * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32a9474917SSean Hefty * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33a9474917SSean Hefty * SOFTWARE. 34e51060f0SSean Hefty */ 35e51060f0SSean Hefty 36e51060f0SSean Hefty #include <linux/completion.h> 37e51060f0SSean Hefty #include <linux/in.h> 38e51060f0SSean Hefty #include <linux/in6.h> 39e51060f0SSean Hefty #include <linux/mutex.h> 40e51060f0SSean Hefty #include <linux/random.h> 41bee3c3c9SMoni Shoua #include <linux/igmp.h> 42e51060f0SSean Hefty #include <linux/idr.h> 4307ebafbaSTom Tucker #include <linux/inetdevice.h> 445a0e3ad6STejun Heo #include <linux/slab.h> 45e4dd23d7SPaul Gortmaker #include <linux/module.h> 46366cddb4SAmir Vadai #include <net/route.h> 47e51060f0SSean Hefty 484be74b42SHaggai Eran #include <net/net_namespace.h> 494be74b42SHaggai Eran #include <net/netns/generic.h> 50e51060f0SSean Hefty #include <net/tcp.h> 511f5175adSAleksey Senin #include <net/ipv6.h> 52f887f2acSHaggai Eran #include <net/ip_fib.h> 53f887f2acSHaggai Eran #include <net/ip6_route.h> 54e51060f0SSean Hefty 55e51060f0SSean Hefty #include <rdma/rdma_cm.h> 56e51060f0SSean Hefty #include <rdma/rdma_cm_ib.h> 57753f618aSNir Muchtar #include <rdma/rdma_netlink.h> 582e2d190cSSean Hefty #include <rdma/ib.h> 59e51060f0SSean Hefty #include <rdma/ib_cache.h> 60e51060f0SSean Hefty #include <rdma/ib_cm.h> 61e51060f0SSean Hefty #include <rdma/ib_sa.h> 6207ebafbaSTom Tucker #include <rdma/iw_cm.h> 63e51060f0SSean Hefty 64218a773fSMatan Barak #include "core_priv.h" 65a3b641afSSteve Wise #include "cma_priv.h" 66218a773fSMatan Barak 67e51060f0SSean Hefty MODULE_AUTHOR("Sean Hefty"); 68e51060f0SSean Hefty MODULE_DESCRIPTION("Generic RDMA CM Agent"); 69e51060f0SSean Hefty MODULE_LICENSE("Dual BSD/GPL"); 70e51060f0SSean Hefty 71e51060f0SSean Hefty #define CMA_CM_RESPONSE_TIMEOUT 20 72ab15c95aSAlex Vesker #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000 73d5bb7599SMichael S. Tsirkin #define CMA_MAX_CM_RETRIES 15 74dcb3f974SSean Hefty #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24) 753c86aa70SEli Cohen #define CMA_IBOE_PACKET_LIFETIME 18 765ab2d89bSLeon Romanovsky #define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP 77e51060f0SSean Hefty 782b1b5b60SSagi Grimberg static const char * const cma_events[] = { 792b1b5b60SSagi Grimberg [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved", 802b1b5b60SSagi Grimberg [RDMA_CM_EVENT_ADDR_ERROR] = "address error", 812b1b5b60SSagi Grimberg [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ", 822b1b5b60SSagi Grimberg [RDMA_CM_EVENT_ROUTE_ERROR] = "route error", 832b1b5b60SSagi Grimberg [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request", 842b1b5b60SSagi Grimberg [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response", 852b1b5b60SSagi Grimberg [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error", 862b1b5b60SSagi Grimberg [RDMA_CM_EVENT_UNREACHABLE] = "unreachable", 872b1b5b60SSagi Grimberg [RDMA_CM_EVENT_REJECTED] = "rejected", 882b1b5b60SSagi Grimberg [RDMA_CM_EVENT_ESTABLISHED] = "established", 892b1b5b60SSagi Grimberg [RDMA_CM_EVENT_DISCONNECTED] = "disconnected", 902b1b5b60SSagi Grimberg [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal", 912b1b5b60SSagi Grimberg [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join", 922b1b5b60SSagi Grimberg [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error", 932b1b5b60SSagi Grimberg [RDMA_CM_EVENT_ADDR_CHANGE] = "address change", 942b1b5b60SSagi Grimberg [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit", 952b1b5b60SSagi Grimberg }; 962b1b5b60SSagi Grimberg 97db7489e0SBart Van Assche const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event) 982b1b5b60SSagi Grimberg { 992b1b5b60SSagi Grimberg size_t index = event; 1002b1b5b60SSagi Grimberg 1012b1b5b60SSagi Grimberg return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ? 1022b1b5b60SSagi Grimberg cma_events[index] : "unrecognized event"; 1032b1b5b60SSagi Grimberg } 1042b1b5b60SSagi Grimberg EXPORT_SYMBOL(rdma_event_msg); 1052b1b5b60SSagi Grimberg 10677a5db13SSteve Wise const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id, 10777a5db13SSteve Wise int reason) 10877a5db13SSteve Wise { 10977a5db13SSteve Wise if (rdma_ib_or_roce(id->device, id->port_num)) 11077a5db13SSteve Wise return ibcm_reject_msg(reason); 11177a5db13SSteve Wise 11277a5db13SSteve Wise if (rdma_protocol_iwarp(id->device, id->port_num)) 11377a5db13SSteve Wise return iwcm_reject_msg(reason); 11477a5db13SSteve Wise 11577a5db13SSteve Wise WARN_ON_ONCE(1); 11677a5db13SSteve Wise return "unrecognized transport"; 11777a5db13SSteve Wise } 11877a5db13SSteve Wise EXPORT_SYMBOL(rdma_reject_msg); 11977a5db13SSteve Wise 1205042a73dSSteve Wise bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason) 1215042a73dSSteve Wise { 1225042a73dSSteve Wise if (rdma_ib_or_roce(id->device, id->port_num)) 1235042a73dSSteve Wise return reason == IB_CM_REJ_CONSUMER_DEFINED; 1245042a73dSSteve Wise 1255042a73dSSteve Wise if (rdma_protocol_iwarp(id->device, id->port_num)) 1265042a73dSSteve Wise return reason == -ECONNREFUSED; 1275042a73dSSteve Wise 1285042a73dSSteve Wise WARN_ON_ONCE(1); 1295042a73dSSteve Wise return false; 1305042a73dSSteve Wise } 1315042a73dSSteve Wise EXPORT_SYMBOL(rdma_is_consumer_reject); 1325042a73dSSteve Wise 1335f244104SSteve Wise const void *rdma_consumer_reject_data(struct rdma_cm_id *id, 1345f244104SSteve Wise struct rdma_cm_event *ev, u8 *data_len) 1355f244104SSteve Wise { 1365f244104SSteve Wise const void *p; 1375f244104SSteve Wise 1385f244104SSteve Wise if (rdma_is_consumer_reject(id, ev->status)) { 1395f244104SSteve Wise *data_len = ev->param.conn.private_data_len; 1405f244104SSteve Wise p = ev->param.conn.private_data; 1415f244104SSteve Wise } else { 1425f244104SSteve Wise *data_len = 0; 1435f244104SSteve Wise p = NULL; 1445f244104SSteve Wise } 1455f244104SSteve Wise return p; 1465f244104SSteve Wise } 1475f244104SSteve Wise EXPORT_SYMBOL(rdma_consumer_reject_data); 1485f244104SSteve Wise 149fbdb0a91SSteve Wise /** 150fbdb0a91SSteve Wise * rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id. 151fbdb0a91SSteve Wise * @id: Communication Identifier 152fbdb0a91SSteve Wise */ 153fbdb0a91SSteve Wise struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id) 154fbdb0a91SSteve Wise { 155fbdb0a91SSteve Wise struct rdma_id_private *id_priv; 156fbdb0a91SSteve Wise 157fbdb0a91SSteve Wise id_priv = container_of(id, struct rdma_id_private, id); 158fbdb0a91SSteve Wise if (id->device->node_type == RDMA_NODE_RNIC) 159fbdb0a91SSteve Wise return id_priv->cm_id.iw; 160fbdb0a91SSteve Wise return NULL; 161fbdb0a91SSteve Wise } 162fbdb0a91SSteve Wise EXPORT_SYMBOL(rdma_iw_cm_id); 163fbdb0a91SSteve Wise 164fbdb0a91SSteve Wise /** 165fbdb0a91SSteve Wise * rdma_res_to_id() - return the rdma_cm_id pointer for this restrack. 166fbdb0a91SSteve Wise * @res: rdma resource tracking entry pointer 167fbdb0a91SSteve Wise */ 168fbdb0a91SSteve Wise struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res) 169fbdb0a91SSteve Wise { 170fbdb0a91SSteve Wise struct rdma_id_private *id_priv = 171fbdb0a91SSteve Wise container_of(res, struct rdma_id_private, res); 172fbdb0a91SSteve Wise 173fbdb0a91SSteve Wise return &id_priv->id; 174fbdb0a91SSteve Wise } 175fbdb0a91SSteve Wise EXPORT_SYMBOL(rdma_res_to_id); 176fbdb0a91SSteve Wise 177e51060f0SSean Hefty static void cma_add_one(struct ib_device *device); 1787c1eb45aSHaggai Eran static void cma_remove_one(struct ib_device *device, void *client_data); 179e51060f0SSean Hefty 180e51060f0SSean Hefty static struct ib_client cma_client = { 181e51060f0SSean Hefty .name = "cma", 182e51060f0SSean Hefty .add = cma_add_one, 183e51060f0SSean Hefty .remove = cma_remove_one 184e51060f0SSean Hefty }; 185e51060f0SSean Hefty 186c1a0b23bSMichael S. Tsirkin static struct ib_sa_client sa_client; 187e51060f0SSean Hefty static LIST_HEAD(dev_list); 188e51060f0SSean Hefty static LIST_HEAD(listen_any_list); 189e51060f0SSean Hefty static DEFINE_MUTEX(lock); 190e51060f0SSean Hefty static struct workqueue_struct *cma_wq; 191c7d03a00SAlexey Dobriyan static unsigned int cma_pernet_id; 192e51060f0SSean Hefty 1934be74b42SHaggai Eran struct cma_pernet { 1944be74b42SHaggai Eran struct idr tcp_ps; 1954be74b42SHaggai Eran struct idr udp_ps; 1964be74b42SHaggai Eran struct idr ipoib_ps; 1974be74b42SHaggai Eran struct idr ib_ps; 1984be74b42SHaggai Eran }; 1994be74b42SHaggai Eran 2004be74b42SHaggai Eran static struct cma_pernet *cma_pernet(struct net *net) 201aac978e1SHaggai Eran { 2024be74b42SHaggai Eran return net_generic(net, cma_pernet_id); 2034be74b42SHaggai Eran } 2044be74b42SHaggai Eran 2052253fc0cSSteve Wise static struct idr *cma_pernet_idr(struct net *net, enum rdma_ucm_port_space ps) 2064be74b42SHaggai Eran { 2074be74b42SHaggai Eran struct cma_pernet *pernet = cma_pernet(net); 2084be74b42SHaggai Eran 209aac978e1SHaggai Eran switch (ps) { 210aac978e1SHaggai Eran case RDMA_PS_TCP: 2114be74b42SHaggai Eran return &pernet->tcp_ps; 212aac978e1SHaggai Eran case RDMA_PS_UDP: 2134be74b42SHaggai Eran return &pernet->udp_ps; 214aac978e1SHaggai Eran case RDMA_PS_IPOIB: 2154be74b42SHaggai Eran return &pernet->ipoib_ps; 216aac978e1SHaggai Eran case RDMA_PS_IB: 2174be74b42SHaggai Eran return &pernet->ib_ps; 218aac978e1SHaggai Eran default: 219aac978e1SHaggai Eran return NULL; 220aac978e1SHaggai Eran } 221aac978e1SHaggai Eran } 222aac978e1SHaggai Eran 223e51060f0SSean Hefty struct cma_device { 224e51060f0SSean Hefty struct list_head list; 225e51060f0SSean Hefty struct ib_device *device; 226e51060f0SSean Hefty struct completion comp; 227e51060f0SSean Hefty atomic_t refcount; 228e51060f0SSean Hefty struct list_head id_list; 229045959dbSMatan Barak enum ib_gid_type *default_gid_type; 23089052d78SMajd Dibbiny u8 *default_roce_tos; 231e51060f0SSean Hefty }; 232e51060f0SSean Hefty 233e51060f0SSean Hefty struct rdma_bind_list { 2342253fc0cSSteve Wise enum rdma_ucm_port_space ps; 235e51060f0SSean Hefty struct hlist_head owners; 236e51060f0SSean Hefty unsigned short port; 237e51060f0SSean Hefty }; 238e51060f0SSean Hefty 239ab15c95aSAlex Vesker struct class_port_info_context { 240ab15c95aSAlex Vesker struct ib_class_port_info *class_port_info; 241ab15c95aSAlex Vesker struct ib_device *device; 242ab15c95aSAlex Vesker struct completion done; 243ab15c95aSAlex Vesker struct ib_sa_query *sa_query; 244ab15c95aSAlex Vesker u8 port_num; 245ab15c95aSAlex Vesker }; 246ab15c95aSAlex Vesker 2472253fc0cSSteve Wise static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps, 248aac978e1SHaggai Eran struct rdma_bind_list *bind_list, int snum) 249aac978e1SHaggai Eran { 2504be74b42SHaggai Eran struct idr *idr = cma_pernet_idr(net, ps); 251aac978e1SHaggai Eran 252aac978e1SHaggai Eran return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL); 253aac978e1SHaggai Eran } 254aac978e1SHaggai Eran 2554be74b42SHaggai Eran static struct rdma_bind_list *cma_ps_find(struct net *net, 2562253fc0cSSteve Wise enum rdma_ucm_port_space ps, int snum) 257aac978e1SHaggai Eran { 2584be74b42SHaggai Eran struct idr *idr = cma_pernet_idr(net, ps); 259aac978e1SHaggai Eran 260aac978e1SHaggai Eran return idr_find(idr, snum); 261aac978e1SHaggai Eran } 262aac978e1SHaggai Eran 2632253fc0cSSteve Wise static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps, 2642253fc0cSSteve Wise int snum) 265aac978e1SHaggai Eran { 2664be74b42SHaggai Eran struct idr *idr = cma_pernet_idr(net, ps); 267aac978e1SHaggai Eran 268aac978e1SHaggai Eran idr_remove(idr, snum); 269aac978e1SHaggai Eran } 270aac978e1SHaggai Eran 27168602120SSean Hefty enum { 27268602120SSean Hefty CMA_OPTION_AFONLY, 27368602120SSean Hefty }; 27468602120SSean Hefty 275218a773fSMatan Barak void cma_ref_dev(struct cma_device *cma_dev) 276218a773fSMatan Barak { 277218a773fSMatan Barak atomic_inc(&cma_dev->refcount); 278218a773fSMatan Barak } 279218a773fSMatan Barak 280045959dbSMatan Barak struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter, 281045959dbSMatan Barak void *cookie) 282045959dbSMatan Barak { 283045959dbSMatan Barak struct cma_device *cma_dev; 284045959dbSMatan Barak struct cma_device *found_cma_dev = NULL; 285045959dbSMatan Barak 286045959dbSMatan Barak mutex_lock(&lock); 287045959dbSMatan Barak 288045959dbSMatan Barak list_for_each_entry(cma_dev, &dev_list, list) 289045959dbSMatan Barak if (filter(cma_dev->device, cookie)) { 290045959dbSMatan Barak found_cma_dev = cma_dev; 291045959dbSMatan Barak break; 292045959dbSMatan Barak } 293045959dbSMatan Barak 294045959dbSMatan Barak if (found_cma_dev) 295045959dbSMatan Barak cma_ref_dev(found_cma_dev); 296045959dbSMatan Barak mutex_unlock(&lock); 297045959dbSMatan Barak return found_cma_dev; 298045959dbSMatan Barak } 299045959dbSMatan Barak 300045959dbSMatan Barak int cma_get_default_gid_type(struct cma_device *cma_dev, 301045959dbSMatan Barak unsigned int port) 302045959dbSMatan Barak { 30324dc831bSYuval Shaia if (!rdma_is_port_valid(cma_dev->device, port)) 304045959dbSMatan Barak return -EINVAL; 305045959dbSMatan Barak 306045959dbSMatan Barak return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)]; 307045959dbSMatan Barak } 308045959dbSMatan Barak 309045959dbSMatan Barak int cma_set_default_gid_type(struct cma_device *cma_dev, 310045959dbSMatan Barak unsigned int port, 311045959dbSMatan Barak enum ib_gid_type default_gid_type) 312045959dbSMatan Barak { 313045959dbSMatan Barak unsigned long supported_gids; 314045959dbSMatan Barak 31524dc831bSYuval Shaia if (!rdma_is_port_valid(cma_dev->device, port)) 316045959dbSMatan Barak return -EINVAL; 317045959dbSMatan Barak 318045959dbSMatan Barak supported_gids = roce_gid_type_mask_support(cma_dev->device, port); 319045959dbSMatan Barak 320045959dbSMatan Barak if (!(supported_gids & 1 << default_gid_type)) 321045959dbSMatan Barak return -EINVAL; 322045959dbSMatan Barak 323045959dbSMatan Barak cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] = 324045959dbSMatan Barak default_gid_type; 325045959dbSMatan Barak 326045959dbSMatan Barak return 0; 327045959dbSMatan Barak } 328045959dbSMatan Barak 32989052d78SMajd Dibbiny int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port) 33089052d78SMajd Dibbiny { 33189052d78SMajd Dibbiny if (!rdma_is_port_valid(cma_dev->device, port)) 33289052d78SMajd Dibbiny return -EINVAL; 33389052d78SMajd Dibbiny 33489052d78SMajd Dibbiny return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)]; 33589052d78SMajd Dibbiny } 33689052d78SMajd Dibbiny 33789052d78SMajd Dibbiny int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port, 33889052d78SMajd Dibbiny u8 default_roce_tos) 33989052d78SMajd Dibbiny { 34089052d78SMajd Dibbiny if (!rdma_is_port_valid(cma_dev->device, port)) 34189052d78SMajd Dibbiny return -EINVAL; 34289052d78SMajd Dibbiny 34389052d78SMajd Dibbiny cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] = 34489052d78SMajd Dibbiny default_roce_tos; 34589052d78SMajd Dibbiny 34689052d78SMajd Dibbiny return 0; 34789052d78SMajd Dibbiny } 348045959dbSMatan Barak struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev) 349045959dbSMatan Barak { 350045959dbSMatan Barak return cma_dev->device; 351045959dbSMatan Barak } 352045959dbSMatan Barak 353e51060f0SSean Hefty /* 354e51060f0SSean Hefty * Device removal can occur at anytime, so we need extra handling to 355e51060f0SSean Hefty * serialize notifying the user of device removal with other callbacks. 356e51060f0SSean Hefty * We do this by disabling removal notification while a callback is in process, 357e51060f0SSean Hefty * and reporting it after the callback completes. 358e51060f0SSean Hefty */ 359e51060f0SSean Hefty 360c8f6a362SSean Hefty struct cma_multicast { 361c8f6a362SSean Hefty struct rdma_id_private *id_priv; 362c8f6a362SSean Hefty union { 363c8f6a362SSean Hefty struct ib_sa_multicast *ib; 364c8f6a362SSean Hefty } multicast; 365c8f6a362SSean Hefty struct list_head list; 366c8f6a362SSean Hefty void *context; 3673f446754SRoland Dreier struct sockaddr_storage addr; 3683c86aa70SEli Cohen struct kref mcref; 369bee3c3c9SMoni Shoua bool igmp_joined; 370ab15c95aSAlex Vesker u8 join_state; 371c8f6a362SSean Hefty }; 372c8f6a362SSean Hefty 373e51060f0SSean Hefty struct cma_work { 374e51060f0SSean Hefty struct work_struct work; 375e51060f0SSean Hefty struct rdma_id_private *id; 376550e5ca7SNir Muchtar enum rdma_cm_state old_state; 377550e5ca7SNir Muchtar enum rdma_cm_state new_state; 378e51060f0SSean Hefty struct rdma_cm_event event; 379e51060f0SSean Hefty }; 380e51060f0SSean Hefty 381dd5bdff8SOr Gerlitz struct cma_ndev_work { 382dd5bdff8SOr Gerlitz struct work_struct work; 383dd5bdff8SOr Gerlitz struct rdma_id_private *id; 384dd5bdff8SOr Gerlitz struct rdma_cm_event event; 385dd5bdff8SOr Gerlitz }; 386dd5bdff8SOr Gerlitz 3873c86aa70SEli Cohen struct iboe_mcast_work { 3883c86aa70SEli Cohen struct work_struct work; 3893c86aa70SEli Cohen struct rdma_id_private *id; 3903c86aa70SEli Cohen struct cma_multicast *mc; 3913c86aa70SEli Cohen }; 3923c86aa70SEli Cohen 393e51060f0SSean Hefty union cma_ip_addr { 394e51060f0SSean Hefty struct in6_addr ip6; 395e51060f0SSean Hefty struct { 3961b90c137SAl Viro __be32 pad[3]; 3971b90c137SAl Viro __be32 addr; 398e51060f0SSean Hefty } ip4; 399e51060f0SSean Hefty }; 400e51060f0SSean Hefty 401e51060f0SSean Hefty struct cma_hdr { 402e51060f0SSean Hefty u8 cma_version; 403e51060f0SSean Hefty u8 ip_version; /* IP version: 7:4 */ 4041b90c137SAl Viro __be16 port; 405e51060f0SSean Hefty union cma_ip_addr src_addr; 406e51060f0SSean Hefty union cma_ip_addr dst_addr; 407e51060f0SSean Hefty }; 408e51060f0SSean Hefty 409e51060f0SSean Hefty #define CMA_VERSION 0x00 410e51060f0SSean Hefty 4114c21b5bcSHaggai Eran struct cma_req_info { 4122918c1a9SParav Pandit struct sockaddr_storage listen_addr_storage; 4132918c1a9SParav Pandit struct sockaddr_storage src_addr_storage; 4144c21b5bcSHaggai Eran struct ib_device *device; 4154c21b5bcSHaggai Eran int port; 4164c21b5bcSHaggai Eran union ib_gid local_gid; 4174c21b5bcSHaggai Eran __be64 service_id; 4184c21b5bcSHaggai Eran u16 pkey; 4194c21b5bcSHaggai Eran bool has_gid:1; 4204c21b5bcSHaggai Eran }; 4214c21b5bcSHaggai Eran 422550e5ca7SNir Muchtar static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp) 423e51060f0SSean Hefty { 424e51060f0SSean Hefty unsigned long flags; 425e51060f0SSean Hefty int ret; 426e51060f0SSean Hefty 427e51060f0SSean Hefty spin_lock_irqsave(&id_priv->lock, flags); 428e51060f0SSean Hefty ret = (id_priv->state == comp); 429e51060f0SSean Hefty spin_unlock_irqrestore(&id_priv->lock, flags); 430e51060f0SSean Hefty return ret; 431e51060f0SSean Hefty } 432e51060f0SSean Hefty 433e51060f0SSean Hefty static int cma_comp_exch(struct rdma_id_private *id_priv, 434550e5ca7SNir Muchtar enum rdma_cm_state comp, enum rdma_cm_state exch) 435e51060f0SSean Hefty { 436e51060f0SSean Hefty unsigned long flags; 437e51060f0SSean Hefty int ret; 438e51060f0SSean Hefty 439e51060f0SSean Hefty spin_lock_irqsave(&id_priv->lock, flags); 440e51060f0SSean Hefty if ((ret = (id_priv->state == comp))) 441e51060f0SSean Hefty id_priv->state = exch; 442e51060f0SSean Hefty spin_unlock_irqrestore(&id_priv->lock, flags); 443e51060f0SSean Hefty return ret; 444e51060f0SSean Hefty } 445e51060f0SSean Hefty 446550e5ca7SNir Muchtar static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv, 447550e5ca7SNir Muchtar enum rdma_cm_state exch) 448e51060f0SSean Hefty { 449e51060f0SSean Hefty unsigned long flags; 450550e5ca7SNir Muchtar enum rdma_cm_state old; 451e51060f0SSean Hefty 452e51060f0SSean Hefty spin_lock_irqsave(&id_priv->lock, flags); 453e51060f0SSean Hefty old = id_priv->state; 454e51060f0SSean Hefty id_priv->state = exch; 455e51060f0SSean Hefty spin_unlock_irqrestore(&id_priv->lock, flags); 456e51060f0SSean Hefty return old; 457e51060f0SSean Hefty } 458e51060f0SSean Hefty 4594c21b5bcSHaggai Eran static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr) 460e51060f0SSean Hefty { 461e51060f0SSean Hefty return hdr->ip_version >> 4; 462e51060f0SSean Hefty } 463e51060f0SSean Hefty 464e51060f0SSean Hefty static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) 465e51060f0SSean Hefty { 466e51060f0SSean Hefty hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); 467e51060f0SSean Hefty } 468e51060f0SSean Hefty 469bee3c3c9SMoni Shoua static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join) 470bee3c3c9SMoni Shoua { 471bee3c3c9SMoni Shoua struct in_device *in_dev = NULL; 472bee3c3c9SMoni Shoua 473bee3c3c9SMoni Shoua if (ndev) { 474bee3c3c9SMoni Shoua rtnl_lock(); 475bee3c3c9SMoni Shoua in_dev = __in_dev_get_rtnl(ndev); 476bee3c3c9SMoni Shoua if (in_dev) { 477bee3c3c9SMoni Shoua if (join) 478bee3c3c9SMoni Shoua ip_mc_inc_group(in_dev, 479bee3c3c9SMoni Shoua *(__be32 *)(mgid->raw + 12)); 480bee3c3c9SMoni Shoua else 481bee3c3c9SMoni Shoua ip_mc_dec_group(in_dev, 482bee3c3c9SMoni Shoua *(__be32 *)(mgid->raw + 12)); 483bee3c3c9SMoni Shoua } 484bee3c3c9SMoni Shoua rtnl_unlock(); 485bee3c3c9SMoni Shoua } 486bee3c3c9SMoni Shoua return (in_dev) ? 0 : -ENODEV; 487bee3c3c9SMoni Shoua } 488bee3c3c9SMoni Shoua 489045959dbSMatan Barak static void _cma_attach_to_dev(struct rdma_id_private *id_priv, 490e51060f0SSean Hefty struct cma_device *cma_dev) 491e51060f0SSean Hefty { 492218a773fSMatan Barak cma_ref_dev(cma_dev); 493e51060f0SSean Hefty id_priv->cma_dev = cma_dev; 494045959dbSMatan Barak id_priv->gid_type = 0; 495e51060f0SSean Hefty id_priv->id.device = cma_dev->device; 4963c86aa70SEli Cohen id_priv->id.route.addr.dev_addr.transport = 4973c86aa70SEli Cohen rdma_node_get_transport(cma_dev->device->node_type); 498e51060f0SSean Hefty list_add_tail(&id_priv->list, &cma_dev->id_list); 49900313983SSteve Wise id_priv->res.type = RDMA_RESTRACK_CM_ID; 50000313983SSteve Wise rdma_restrack_add(&id_priv->res); 501e51060f0SSean Hefty } 502e51060f0SSean Hefty 503045959dbSMatan Barak static void cma_attach_to_dev(struct rdma_id_private *id_priv, 504045959dbSMatan Barak struct cma_device *cma_dev) 505045959dbSMatan Barak { 506045959dbSMatan Barak _cma_attach_to_dev(id_priv, cma_dev); 507045959dbSMatan Barak id_priv->gid_type = 508045959dbSMatan Barak cma_dev->default_gid_type[id_priv->id.port_num - 509045959dbSMatan Barak rdma_start_port(cma_dev->device)]; 510045959dbSMatan Barak } 511045959dbSMatan Barak 512218a773fSMatan Barak void cma_deref_dev(struct cma_device *cma_dev) 513e51060f0SSean Hefty { 514e51060f0SSean Hefty if (atomic_dec_and_test(&cma_dev->refcount)) 515e51060f0SSean Hefty complete(&cma_dev->comp); 516e51060f0SSean Hefty } 517e51060f0SSean Hefty 5183c86aa70SEli Cohen static inline void release_mc(struct kref *kref) 5193c86aa70SEli Cohen { 5203c86aa70SEli Cohen struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref); 5213c86aa70SEli Cohen 5223c86aa70SEli Cohen kfree(mc->multicast.ib); 5233c86aa70SEli Cohen kfree(mc); 5243c86aa70SEli Cohen } 5253c86aa70SEli Cohen 526a396d43aSSean Hefty static void cma_release_dev(struct rdma_id_private *id_priv) 527e51060f0SSean Hefty { 528a396d43aSSean Hefty mutex_lock(&lock); 529e51060f0SSean Hefty list_del(&id_priv->list); 530e51060f0SSean Hefty cma_deref_dev(id_priv->cma_dev); 531e51060f0SSean Hefty id_priv->cma_dev = NULL; 532a396d43aSSean Hefty mutex_unlock(&lock); 533e51060f0SSean Hefty } 534e51060f0SSean Hefty 535f4753834SSean Hefty static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv) 536f4753834SSean Hefty { 537f4753834SSean Hefty return (struct sockaddr *) &id_priv->id.route.addr.src_addr; 538f4753834SSean Hefty } 539f4753834SSean Hefty 540f4753834SSean Hefty static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv) 541f4753834SSean Hefty { 542f4753834SSean Hefty return (struct sockaddr *) &id_priv->id.route.addr.dst_addr; 543f4753834SSean Hefty } 544f4753834SSean Hefty 545f4753834SSean Hefty static inline unsigned short cma_family(struct rdma_id_private *id_priv) 546f4753834SSean Hefty { 547f4753834SSean Hefty return id_priv->id.route.addr.src_addr.ss_family; 548f4753834SSean Hefty } 549f4753834SSean Hefty 5505c438135SSean Hefty static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey) 551c8f6a362SSean Hefty { 552c8f6a362SSean Hefty struct ib_sa_mcmember_rec rec; 553c8f6a362SSean Hefty int ret = 0; 554c8f6a362SSean Hefty 5555c438135SSean Hefty if (id_priv->qkey) { 5565c438135SSean Hefty if (qkey && id_priv->qkey != qkey) 5575c438135SSean Hefty return -EINVAL; 558d2ca39f2SYossi Etigin return 0; 5595c438135SSean Hefty } 5605c438135SSean Hefty 5615c438135SSean Hefty if (qkey) { 5625c438135SSean Hefty id_priv->qkey = qkey; 5635c438135SSean Hefty return 0; 5645c438135SSean Hefty } 565d2ca39f2SYossi Etigin 566d2ca39f2SYossi Etigin switch (id_priv->id.ps) { 567c8f6a362SSean Hefty case RDMA_PS_UDP: 5685c438135SSean Hefty case RDMA_PS_IB: 569d2ca39f2SYossi Etigin id_priv->qkey = RDMA_UDP_QKEY; 570c8f6a362SSean Hefty break; 571c8f6a362SSean Hefty case RDMA_PS_IPOIB: 572d2ca39f2SYossi Etigin ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid); 573d2ca39f2SYossi Etigin ret = ib_sa_get_mcmember_rec(id_priv->id.device, 574d2ca39f2SYossi Etigin id_priv->id.port_num, &rec.mgid, 575d2ca39f2SYossi Etigin &rec); 576d2ca39f2SYossi Etigin if (!ret) 577d2ca39f2SYossi Etigin id_priv->qkey = be32_to_cpu(rec.qkey); 578c8f6a362SSean Hefty break; 579c8f6a362SSean Hefty default: 580c8f6a362SSean Hefty break; 581c8f6a362SSean Hefty } 582c8f6a362SSean Hefty return ret; 583c8f6a362SSean Hefty } 584c8f6a362SSean Hefty 585680f920aSSean Hefty static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr) 586680f920aSSean Hefty { 587680f920aSSean Hefty dev_addr->dev_type = ARPHRD_INFINIBAND; 588680f920aSSean Hefty rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr); 589680f920aSSean Hefty ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey)); 590680f920aSSean Hefty } 591680f920aSSean Hefty 592680f920aSSean Hefty static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr) 593680f920aSSean Hefty { 594680f920aSSean Hefty int ret; 595680f920aSSean Hefty 596680f920aSSean Hefty if (addr->sa_family != AF_IB) { 597575c7e58SParav Pandit ret = rdma_translate_ip(addr, dev_addr); 598680f920aSSean Hefty } else { 599680f920aSSean Hefty cma_translate_ib((struct sockaddr_ib *) addr, dev_addr); 600680f920aSSean Hefty ret = 0; 601680f920aSSean Hefty } 602680f920aSSean Hefty 603680f920aSSean Hefty return ret; 604680f920aSSean Hefty } 605680f920aSSean Hefty 6067c11147dSMichael Wang static inline int cma_validate_port(struct ib_device *device, u8 port, 607045959dbSMatan Barak enum ib_gid_type gid_type, 6082493a57bSParav Pandit union ib_gid *gid, 6092493a57bSParav Pandit struct rdma_id_private *id_priv) 6107c11147dSMichael Wang { 6112493a57bSParav Pandit struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 6122493a57bSParav Pandit int bound_if_index = dev_addr->bound_dev_if; 6132493a57bSParav Pandit int dev_type = dev_addr->dev_type; 614abae1b71SMatan Barak struct net_device *ndev = NULL; 6152493a57bSParav Pandit int ret = -ENODEV; 6167c11147dSMichael Wang 6177c11147dSMichael Wang if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port)) 6187c11147dSMichael Wang return ret; 6197c11147dSMichael Wang 6207c11147dSMichael Wang if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port)) 6217c11147dSMichael Wang return ret; 6227c11147dSMichael Wang 62300db63c1SParav Pandit if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) { 62466c74d74SParav Pandit ndev = dev_get_by_index(dev_addr->net, bound_if_index); 62500db63c1SParav Pandit if (!ndev) 62600db63c1SParav Pandit return ret; 62700db63c1SParav Pandit } else { 628045959dbSMatan Barak gid_type = IB_GID_TYPE_IB; 62900db63c1SParav Pandit } 630abae1b71SMatan Barak 631045959dbSMatan Barak ret = ib_find_cached_gid_by_port(device, gid, gid_type, port, 632b39ffa1dSMatan Barak ndev, NULL); 633abae1b71SMatan Barak 634abae1b71SMatan Barak if (ndev) 635abae1b71SMatan Barak dev_put(ndev); 6367c11147dSMichael Wang 6377c11147dSMichael Wang return ret; 6387c11147dSMichael Wang } 6397c11147dSMichael Wang 640be9130ccSDoug Ledford static int cma_acquire_dev(struct rdma_id_private *id_priv, 641be9130ccSDoug Ledford struct rdma_id_private *listen_id_priv) 642e51060f0SSean Hefty { 643c8f6a362SSean Hefty struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 644e51060f0SSean Hefty struct cma_device *cma_dev; 6457c11147dSMichael Wang union ib_gid gid, iboe_gid, *gidp; 646e51060f0SSean Hefty int ret = -ENODEV; 6477c11147dSMichael Wang u8 port; 648e51060f0SSean Hefty 6497c11147dSMichael Wang if (dev_addr->dev_type != ARPHRD_INFINIBAND && 6502efdd6a0SMoni Shoua id_priv->id.ps == RDMA_PS_IPOIB) 6512efdd6a0SMoni Shoua return -EINVAL; 6522efdd6a0SMoni Shoua 653a396d43aSSean Hefty mutex_lock(&lock); 6547b85627bSMoni Shoua rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 6557b85627bSMoni Shoua &iboe_gid); 6567b85627bSMoni Shoua 6573c86aa70SEli Cohen memcpy(&gid, dev_addr->src_dev_addr + 6583c86aa70SEli Cohen rdma_addr_gid_offset(dev_addr), sizeof gid); 6597c11147dSMichael Wang 6607c11147dSMichael Wang if (listen_id_priv) { 661be9130ccSDoug Ledford cma_dev = listen_id_priv->cma_dev; 662be9130ccSDoug Ledford port = listen_id_priv->id.port_num; 6635d9fb044SIra Weiny gidp = rdma_protocol_roce(cma_dev->device, port) ? 6647c11147dSMichael Wang &iboe_gid : &gid; 665be9130ccSDoug Ledford 666045959dbSMatan Barak ret = cma_validate_port(cma_dev->device, port, 667045959dbSMatan Barak rdma_protocol_ib(cma_dev->device, port) ? 668045959dbSMatan Barak IB_GID_TYPE_IB : 669045959dbSMatan Barak listen_id_priv->gid_type, gidp, 6702493a57bSParav Pandit id_priv); 6717c11147dSMichael Wang if (!ret) { 6727c11147dSMichael Wang id_priv->id.port_num = port; 673be9130ccSDoug Ledford goto out; 674be9130ccSDoug Ledford } 675be9130ccSDoug Ledford } 6767c11147dSMichael Wang 677e51060f0SSean Hefty list_for_each_entry(cma_dev, &dev_list, list) { 6783c86aa70SEli Cohen for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { 679be9130ccSDoug Ledford if (listen_id_priv && 680be9130ccSDoug Ledford listen_id_priv->cma_dev == cma_dev && 681be9130ccSDoug Ledford listen_id_priv->id.port_num == port) 682be9130ccSDoug Ledford continue; 6833c86aa70SEli Cohen 6845d9fb044SIra Weiny gidp = rdma_protocol_roce(cma_dev->device, port) ? 6857c11147dSMichael Wang &iboe_gid : &gid; 6867c11147dSMichael Wang 687045959dbSMatan Barak ret = cma_validate_port(cma_dev->device, port, 688045959dbSMatan Barak rdma_protocol_ib(cma_dev->device, port) ? 689045959dbSMatan Barak IB_GID_TYPE_IB : 690045959dbSMatan Barak cma_dev->default_gid_type[port - 1], 6912493a57bSParav Pandit gidp, id_priv); 6927c11147dSMichael Wang if (!ret) { 6937c11147dSMichael Wang id_priv->id.port_num = port; 6943c86aa70SEli Cohen goto out; 69563f05be2Sshefty } 696e51060f0SSean Hefty } 697e51060f0SSean Hefty } 6983c86aa70SEli Cohen 6993c86aa70SEli Cohen out: 7003c86aa70SEli Cohen if (!ret) 7013c86aa70SEli Cohen cma_attach_to_dev(id_priv, cma_dev); 7023c86aa70SEli Cohen 703a396d43aSSean Hefty mutex_unlock(&lock); 704e51060f0SSean Hefty return ret; 705e51060f0SSean Hefty } 706e51060f0SSean Hefty 707f17df3b0SSean Hefty /* 708f17df3b0SSean Hefty * Select the source IB device and address to reach the destination IB address. 709f17df3b0SSean Hefty */ 710f17df3b0SSean Hefty static int cma_resolve_ib_dev(struct rdma_id_private *id_priv) 711f17df3b0SSean Hefty { 712f17df3b0SSean Hefty struct cma_device *cma_dev, *cur_dev; 713f17df3b0SSean Hefty struct sockaddr_ib *addr; 714f17df3b0SSean Hefty union ib_gid gid, sgid, *dgid; 715f17df3b0SSean Hefty u16 pkey, index; 7168fb488d7SPaul Bolle u8 p; 71793b1f29dSJack Wang enum ib_port_state port_state; 718f17df3b0SSean Hefty int i; 719f17df3b0SSean Hefty 720f17df3b0SSean Hefty cma_dev = NULL; 721f17df3b0SSean Hefty addr = (struct sockaddr_ib *) cma_dst_addr(id_priv); 722f17df3b0SSean Hefty dgid = (union ib_gid *) &addr->sib_addr; 723f17df3b0SSean Hefty pkey = ntohs(addr->sib_pkey); 724f17df3b0SSean Hefty 725f17df3b0SSean Hefty list_for_each_entry(cur_dev, &dev_list, list) { 726fef60902SMichael Wang for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 72730a74ef4SMichael Wang if (!rdma_cap_af_ib(cur_dev->device, p)) 728f17df3b0SSean Hefty continue; 729f17df3b0SSean Hefty 730f17df3b0SSean Hefty if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index)) 731f17df3b0SSean Hefty continue; 732f17df3b0SSean Hefty 73393b1f29dSJack Wang if (ib_get_cached_port_state(cur_dev->device, p, &port_state)) 73493b1f29dSJack Wang continue; 73555ee3ab2SMatan Barak for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, 73655ee3ab2SMatan Barak &gid, NULL); 73755ee3ab2SMatan Barak i++) { 738f17df3b0SSean Hefty if (!memcmp(&gid, dgid, sizeof(gid))) { 739f17df3b0SSean Hefty cma_dev = cur_dev; 740f17df3b0SSean Hefty sgid = gid; 7418fb488d7SPaul Bolle id_priv->id.port_num = p; 742f17df3b0SSean Hefty goto found; 743f17df3b0SSean Hefty } 744f17df3b0SSean Hefty 745f17df3b0SSean Hefty if (!cma_dev && (gid.global.subnet_prefix == 74693b1f29dSJack Wang dgid->global.subnet_prefix) && 74793b1f29dSJack Wang port_state == IB_PORT_ACTIVE) { 748f17df3b0SSean Hefty cma_dev = cur_dev; 749f17df3b0SSean Hefty sgid = gid; 7508fb488d7SPaul Bolle id_priv->id.port_num = p; 751f17df3b0SSean Hefty } 752f17df3b0SSean Hefty } 753f17df3b0SSean Hefty } 754f17df3b0SSean Hefty } 755f17df3b0SSean Hefty 756f17df3b0SSean Hefty if (!cma_dev) 757f17df3b0SSean Hefty return -ENODEV; 758f17df3b0SSean Hefty 759f17df3b0SSean Hefty found: 760f17df3b0SSean Hefty cma_attach_to_dev(id_priv, cma_dev); 761f17df3b0SSean Hefty addr = (struct sockaddr_ib *) cma_src_addr(id_priv); 762f17df3b0SSean Hefty memcpy(&addr->sib_addr, &sgid, sizeof sgid); 763f17df3b0SSean Hefty cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr); 764f17df3b0SSean Hefty return 0; 765f17df3b0SSean Hefty } 766f17df3b0SSean Hefty 767e51060f0SSean Hefty static void cma_deref_id(struct rdma_id_private *id_priv) 768e51060f0SSean Hefty { 769e51060f0SSean Hefty if (atomic_dec_and_test(&id_priv->refcount)) 770e51060f0SSean Hefty complete(&id_priv->comp); 771e51060f0SSean Hefty } 772e51060f0SSean Hefty 77300313983SSteve Wise struct rdma_cm_id *__rdma_create_id(struct net *net, 774fa20105eSGuy Shapiro rdma_cm_event_handler event_handler, 7752253fc0cSSteve Wise void *context, enum rdma_ucm_port_space ps, 77600313983SSteve Wise enum ib_qp_type qp_type, const char *caller) 777e51060f0SSean Hefty { 778e51060f0SSean Hefty struct rdma_id_private *id_priv; 779e51060f0SSean Hefty 780e51060f0SSean Hefty id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL); 781e51060f0SSean Hefty if (!id_priv) 782e51060f0SSean Hefty return ERR_PTR(-ENOMEM); 783e51060f0SSean Hefty 78400313983SSteve Wise if (caller) 78500313983SSteve Wise id_priv->res.kern_name = caller; 78600313983SSteve Wise else 78700313983SSteve Wise rdma_restrack_set_task(&id_priv->res, current); 788550e5ca7SNir Muchtar id_priv->state = RDMA_CM_IDLE; 789e51060f0SSean Hefty id_priv->id.context = context; 790e51060f0SSean Hefty id_priv->id.event_handler = event_handler; 791e51060f0SSean Hefty id_priv->id.ps = ps; 792b26f9b99SSean Hefty id_priv->id.qp_type = qp_type; 79389052d78SMajd Dibbiny id_priv->tos_set = false; 794e51060f0SSean Hefty spin_lock_init(&id_priv->lock); 795c5483388SSean Hefty mutex_init(&id_priv->qp_mutex); 796e51060f0SSean Hefty init_completion(&id_priv->comp); 797e51060f0SSean Hefty atomic_set(&id_priv->refcount, 1); 798de910bd9SOr Gerlitz mutex_init(&id_priv->handler_mutex); 799e51060f0SSean Hefty INIT_LIST_HEAD(&id_priv->listen_list); 800c8f6a362SSean Hefty INIT_LIST_HEAD(&id_priv->mc_list); 801e51060f0SSean Hefty get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num); 802fa20105eSGuy Shapiro id_priv->id.route.addr.dev_addr.net = get_net(net); 80323a9cd2aSMoni Shoua id_priv->seq_num &= 0x00ffffff; 804e51060f0SSean Hefty 805e51060f0SSean Hefty return &id_priv->id; 806e51060f0SSean Hefty } 80700313983SSteve Wise EXPORT_SYMBOL(__rdma_create_id); 808e51060f0SSean Hefty 809c8f6a362SSean Hefty static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 810e51060f0SSean Hefty { 811e51060f0SSean Hefty struct ib_qp_attr qp_attr; 812c8f6a362SSean Hefty int qp_attr_mask, ret; 813e51060f0SSean Hefty 814c8f6a362SSean Hefty qp_attr.qp_state = IB_QPS_INIT; 815c8f6a362SSean Hefty ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 816e51060f0SSean Hefty if (ret) 817e51060f0SSean Hefty return ret; 818e51060f0SSean Hefty 819c8f6a362SSean Hefty ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 820c8f6a362SSean Hefty if (ret) 821c8f6a362SSean Hefty return ret; 822c8f6a362SSean Hefty 823c8f6a362SSean Hefty qp_attr.qp_state = IB_QPS_RTR; 824c8f6a362SSean Hefty ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE); 825c8f6a362SSean Hefty if (ret) 826c8f6a362SSean Hefty return ret; 827c8f6a362SSean Hefty 828c8f6a362SSean Hefty qp_attr.qp_state = IB_QPS_RTS; 829c8f6a362SSean Hefty qp_attr.sq_psn = 0; 830c8f6a362SSean Hefty ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN); 831c8f6a362SSean Hefty 832c8f6a362SSean Hefty return ret; 833e51060f0SSean Hefty } 834e51060f0SSean Hefty 835c8f6a362SSean Hefty static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp) 83607ebafbaSTom Tucker { 83707ebafbaSTom Tucker struct ib_qp_attr qp_attr; 838c8f6a362SSean Hefty int qp_attr_mask, ret; 83907ebafbaSTom Tucker 84007ebafbaSTom Tucker qp_attr.qp_state = IB_QPS_INIT; 841c8f6a362SSean Hefty ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 842c8f6a362SSean Hefty if (ret) 843c8f6a362SSean Hefty return ret; 84407ebafbaSTom Tucker 845c8f6a362SSean Hefty return ib_modify_qp(qp, &qp_attr, qp_attr_mask); 84607ebafbaSTom Tucker } 84707ebafbaSTom Tucker 848e51060f0SSean Hefty int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd, 849e51060f0SSean Hefty struct ib_qp_init_attr *qp_init_attr) 850e51060f0SSean Hefty { 851e51060f0SSean Hefty struct rdma_id_private *id_priv; 852e51060f0SSean Hefty struct ib_qp *qp; 853e51060f0SSean Hefty int ret; 854e51060f0SSean Hefty 855e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 856e51060f0SSean Hefty if (id->device != pd->device) 857e51060f0SSean Hefty return -EINVAL; 858e51060f0SSean Hefty 8590691a286SChristoph Hellwig qp_init_attr->port_num = id->port_num; 860e51060f0SSean Hefty qp = ib_create_qp(pd, qp_init_attr); 861e51060f0SSean Hefty if (IS_ERR(qp)) 862e51060f0SSean Hefty return PTR_ERR(qp); 863e51060f0SSean Hefty 864b26f9b99SSean Hefty if (id->qp_type == IB_QPT_UD) 865c8f6a362SSean Hefty ret = cma_init_ud_qp(id_priv, qp); 866c8f6a362SSean Hefty else 867c8f6a362SSean Hefty ret = cma_init_conn_qp(id_priv, qp); 868e51060f0SSean Hefty if (ret) 869e51060f0SSean Hefty goto err; 870e51060f0SSean Hefty 871e51060f0SSean Hefty id->qp = qp; 872e51060f0SSean Hefty id_priv->qp_num = qp->qp_num; 873e51060f0SSean Hefty id_priv->srq = (qp->srq != NULL); 874e51060f0SSean Hefty return 0; 875e51060f0SSean Hefty err: 876e51060f0SSean Hefty ib_destroy_qp(qp); 877e51060f0SSean Hefty return ret; 878e51060f0SSean Hefty } 879e51060f0SSean Hefty EXPORT_SYMBOL(rdma_create_qp); 880e51060f0SSean Hefty 881e51060f0SSean Hefty void rdma_destroy_qp(struct rdma_cm_id *id) 882e51060f0SSean Hefty { 883c5483388SSean Hefty struct rdma_id_private *id_priv; 884c5483388SSean Hefty 885c5483388SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 886c5483388SSean Hefty mutex_lock(&id_priv->qp_mutex); 887c5483388SSean Hefty ib_destroy_qp(id_priv->id.qp); 888c5483388SSean Hefty id_priv->id.qp = NULL; 889c5483388SSean Hefty mutex_unlock(&id_priv->qp_mutex); 890e51060f0SSean Hefty } 891e51060f0SSean Hefty EXPORT_SYMBOL(rdma_destroy_qp); 892e51060f0SSean Hefty 8935851bb89SSean Hefty static int cma_modify_qp_rtr(struct rdma_id_private *id_priv, 8945851bb89SSean Hefty struct rdma_conn_param *conn_param) 895e51060f0SSean Hefty { 896e51060f0SSean Hefty struct ib_qp_attr qp_attr; 897e51060f0SSean Hefty int qp_attr_mask, ret; 898e51060f0SSean Hefty 899c5483388SSean Hefty mutex_lock(&id_priv->qp_mutex); 900c5483388SSean Hefty if (!id_priv->id.qp) { 901c5483388SSean Hefty ret = 0; 902c5483388SSean Hefty goto out; 903c5483388SSean Hefty } 904e51060f0SSean Hefty 905e51060f0SSean Hefty /* Need to update QP attributes from default values. */ 906e51060f0SSean Hefty qp_attr.qp_state = IB_QPS_INIT; 907c5483388SSean Hefty ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 908e51060f0SSean Hefty if (ret) 909c5483388SSean Hefty goto out; 910e51060f0SSean Hefty 911c5483388SSean Hefty ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 912e51060f0SSean Hefty if (ret) 913c5483388SSean Hefty goto out; 914e51060f0SSean Hefty 915e51060f0SSean Hefty qp_attr.qp_state = IB_QPS_RTR; 916c5483388SSean Hefty ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 917e51060f0SSean Hefty if (ret) 918c5483388SSean Hefty goto out; 919e51060f0SSean Hefty 920fef60902SMichael Wang BUG_ON(id_priv->cma_dev->device != id_priv->id.device); 921fef60902SMichael Wang 9225851bb89SSean Hefty if (conn_param) 9235851bb89SSean Hefty qp_attr.max_dest_rd_atomic = conn_param->responder_resources; 924c5483388SSean Hefty ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 925c5483388SSean Hefty out: 926c5483388SSean Hefty mutex_unlock(&id_priv->qp_mutex); 927c5483388SSean Hefty return ret; 928e51060f0SSean Hefty } 929e51060f0SSean Hefty 9305851bb89SSean Hefty static int cma_modify_qp_rts(struct rdma_id_private *id_priv, 9315851bb89SSean Hefty struct rdma_conn_param *conn_param) 932e51060f0SSean Hefty { 933e51060f0SSean Hefty struct ib_qp_attr qp_attr; 934e51060f0SSean Hefty int qp_attr_mask, ret; 935e51060f0SSean Hefty 936c5483388SSean Hefty mutex_lock(&id_priv->qp_mutex); 937c5483388SSean Hefty if (!id_priv->id.qp) { 938c5483388SSean Hefty ret = 0; 939c5483388SSean Hefty goto out; 940e51060f0SSean Hefty } 941e51060f0SSean Hefty 942c5483388SSean Hefty qp_attr.qp_state = IB_QPS_RTS; 943c5483388SSean Hefty ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask); 944c5483388SSean Hefty if (ret) 945c5483388SSean Hefty goto out; 946c5483388SSean Hefty 9475851bb89SSean Hefty if (conn_param) 9485851bb89SSean Hefty qp_attr.max_rd_atomic = conn_param->initiator_depth; 949c5483388SSean Hefty ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask); 950c5483388SSean Hefty out: 951c5483388SSean Hefty mutex_unlock(&id_priv->qp_mutex); 952c5483388SSean Hefty return ret; 953c5483388SSean Hefty } 954c5483388SSean Hefty 955c5483388SSean Hefty static int cma_modify_qp_err(struct rdma_id_private *id_priv) 956e51060f0SSean Hefty { 957e51060f0SSean Hefty struct ib_qp_attr qp_attr; 958c5483388SSean Hefty int ret; 959e51060f0SSean Hefty 960c5483388SSean Hefty mutex_lock(&id_priv->qp_mutex); 961c5483388SSean Hefty if (!id_priv->id.qp) { 962c5483388SSean Hefty ret = 0; 963c5483388SSean Hefty goto out; 964c5483388SSean Hefty } 965e51060f0SSean Hefty 966e51060f0SSean Hefty qp_attr.qp_state = IB_QPS_ERR; 967c5483388SSean Hefty ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE); 968c5483388SSean Hefty out: 969c5483388SSean Hefty mutex_unlock(&id_priv->qp_mutex); 970c5483388SSean Hefty return ret; 971e51060f0SSean Hefty } 972e51060f0SSean Hefty 973c8f6a362SSean Hefty static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv, 974c8f6a362SSean Hefty struct ib_qp_attr *qp_attr, int *qp_attr_mask) 975c8f6a362SSean Hefty { 976c8f6a362SSean Hefty struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 977c8f6a362SSean Hefty int ret; 9783c86aa70SEli Cohen u16 pkey; 9793c86aa70SEli Cohen 980227128fcSMichael Wang if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num)) 9813c86aa70SEli Cohen pkey = 0xffff; 982fef60902SMichael Wang else 983fef60902SMichael Wang pkey = ib_addr_get_pkey(dev_addr); 984c8f6a362SSean Hefty 985c8f6a362SSean Hefty ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num, 9863c86aa70SEli Cohen pkey, &qp_attr->pkey_index); 987c8f6a362SSean Hefty if (ret) 988c8f6a362SSean Hefty return ret; 989c8f6a362SSean Hefty 990c8f6a362SSean Hefty qp_attr->port_num = id_priv->id.port_num; 991c8f6a362SSean Hefty *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT; 992c8f6a362SSean Hefty 993b26f9b99SSean Hefty if (id_priv->id.qp_type == IB_QPT_UD) { 9945c438135SSean Hefty ret = cma_set_qkey(id_priv, 0); 995d2ca39f2SYossi Etigin if (ret) 996d2ca39f2SYossi Etigin return ret; 997d2ca39f2SYossi Etigin 998c8f6a362SSean Hefty qp_attr->qkey = id_priv->qkey; 999c8f6a362SSean Hefty *qp_attr_mask |= IB_QP_QKEY; 1000c8f6a362SSean Hefty } else { 1001c8f6a362SSean Hefty qp_attr->qp_access_flags = 0; 1002c8f6a362SSean Hefty *qp_attr_mask |= IB_QP_ACCESS_FLAGS; 1003c8f6a362SSean Hefty } 1004c8f6a362SSean Hefty return 0; 1005c8f6a362SSean Hefty } 1006c8f6a362SSean Hefty 1007e51060f0SSean Hefty int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr, 1008e51060f0SSean Hefty int *qp_attr_mask) 1009e51060f0SSean Hefty { 1010e51060f0SSean Hefty struct rdma_id_private *id_priv; 1011c8f6a362SSean Hefty int ret = 0; 1012e51060f0SSean Hefty 1013e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 101472219ceaSMichael Wang if (rdma_cap_ib_cm(id->device, id->port_num)) { 1015b26f9b99SSean Hefty if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD)) 1016c8f6a362SSean Hefty ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask); 1017c8f6a362SSean Hefty else 1018e51060f0SSean Hefty ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr, 1019e51060f0SSean Hefty qp_attr_mask); 1020dd5f03beSMatan Barak 1021e51060f0SSean Hefty if (qp_attr->qp_state == IB_QPS_RTR) 1022e51060f0SSean Hefty qp_attr->rq_psn = id_priv->seq_num; 102304215330SMichael Wang } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 1024c8f6a362SSean Hefty if (!id_priv->cm_id.iw) { 10258f076531SDotan Barak qp_attr->qp_access_flags = 0; 1026c8f6a362SSean Hefty *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS; 1027c8f6a362SSean Hefty } else 102807ebafbaSTom Tucker ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr, 102907ebafbaSTom Tucker qp_attr_mask); 1030a62ab66bSIsmail, Mustafa qp_attr->port_num = id_priv->id.port_num; 1031a62ab66bSIsmail, Mustafa *qp_attr_mask |= IB_QP_PORT; 103221655afcSMichael Wang } else 1033e51060f0SSean Hefty ret = -ENOSYS; 1034e51060f0SSean Hefty 1035e51060f0SSean Hefty return ret; 1036e51060f0SSean Hefty } 1037e51060f0SSean Hefty EXPORT_SYMBOL(rdma_init_qp_attr); 1038e51060f0SSean Hefty 1039e51060f0SSean Hefty static inline int cma_zero_addr(struct sockaddr *addr) 1040e51060f0SSean Hefty { 10412e2d190cSSean Hefty switch (addr->sa_family) { 10422e2d190cSSean Hefty case AF_INET: 10432e2d190cSSean Hefty return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr); 10442e2d190cSSean Hefty case AF_INET6: 10452e2d190cSSean Hefty return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr); 10462e2d190cSSean Hefty case AF_IB: 10472e2d190cSSean Hefty return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr); 10482e2d190cSSean Hefty default: 10492e2d190cSSean Hefty return 0; 1050e51060f0SSean Hefty } 1051e51060f0SSean Hefty } 1052e51060f0SSean Hefty 1053e51060f0SSean Hefty static inline int cma_loopback_addr(struct sockaddr *addr) 1054e51060f0SSean Hefty { 10552e2d190cSSean Hefty switch (addr->sa_family) { 10562e2d190cSSean Hefty case AF_INET: 10572e2d190cSSean Hefty return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr); 10582e2d190cSSean Hefty case AF_INET6: 10592e2d190cSSean Hefty return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr); 10602e2d190cSSean Hefty case AF_IB: 10612e2d190cSSean Hefty return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr); 10622e2d190cSSean Hefty default: 10632e2d190cSSean Hefty return 0; 10642e2d190cSSean Hefty } 1065e51060f0SSean Hefty } 1066e51060f0SSean Hefty 1067e51060f0SSean Hefty static inline int cma_any_addr(struct sockaddr *addr) 1068e51060f0SSean Hefty { 1069e51060f0SSean Hefty return cma_zero_addr(addr) || cma_loopback_addr(addr); 1070e51060f0SSean Hefty } 1071e51060f0SSean Hefty 107243b752daSHefty, Sean static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst) 107343b752daSHefty, Sean { 107443b752daSHefty, Sean if (src->sa_family != dst->sa_family) 107543b752daSHefty, Sean return -1; 107643b752daSHefty, Sean 107743b752daSHefty, Sean switch (src->sa_family) { 107843b752daSHefty, Sean case AF_INET: 107943b752daSHefty, Sean return ((struct sockaddr_in *) src)->sin_addr.s_addr != 108043b752daSHefty, Sean ((struct sockaddr_in *) dst)->sin_addr.s_addr; 10812e2d190cSSean Hefty case AF_INET6: 108243b752daSHefty, Sean return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, 108343b752daSHefty, Sean &((struct sockaddr_in6 *) dst)->sin6_addr); 10842e2d190cSSean Hefty default: 10852e2d190cSSean Hefty return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr, 10862e2d190cSSean Hefty &((struct sockaddr_ib *) dst)->sib_addr); 108743b752daSHefty, Sean } 108843b752daSHefty, Sean } 108943b752daSHefty, Sean 109058afdcb7SSean Hefty static __be16 cma_port(struct sockaddr *addr) 1091628e5f6dSSean Hefty { 109258afdcb7SSean Hefty struct sockaddr_ib *sib; 109358afdcb7SSean Hefty 109458afdcb7SSean Hefty switch (addr->sa_family) { 109558afdcb7SSean Hefty case AF_INET: 1096628e5f6dSSean Hefty return ((struct sockaddr_in *) addr)->sin_port; 109758afdcb7SSean Hefty case AF_INET6: 1098628e5f6dSSean Hefty return ((struct sockaddr_in6 *) addr)->sin6_port; 109958afdcb7SSean Hefty case AF_IB: 110058afdcb7SSean Hefty sib = (struct sockaddr_ib *) addr; 110158afdcb7SSean Hefty return htons((u16) (be64_to_cpu(sib->sib_sid) & 110258afdcb7SSean Hefty be64_to_cpu(sib->sib_sid_mask))); 110358afdcb7SSean Hefty default: 110458afdcb7SSean Hefty return 0; 110558afdcb7SSean Hefty } 1106628e5f6dSSean Hefty } 1107628e5f6dSSean Hefty 1108e51060f0SSean Hefty static inline int cma_any_port(struct sockaddr *addr) 1109e51060f0SSean Hefty { 1110628e5f6dSSean Hefty return !cma_port(addr); 1111e51060f0SSean Hefty } 1112e51060f0SSean Hefty 11130c505f70SHaggai Eran static void cma_save_ib_info(struct sockaddr *src_addr, 11140c505f70SHaggai Eran struct sockaddr *dst_addr, 11150c505f70SHaggai Eran struct rdma_cm_id *listen_id, 1116c2f8fc4eSDasaratharaman Chandramouli struct sa_path_rec *path) 1117e51060f0SSean Hefty { 1118fbaa1a6dSSean Hefty struct sockaddr_ib *listen_ib, *ib; 1119e51060f0SSean Hefty 1120fbaa1a6dSSean Hefty listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr; 11210c505f70SHaggai Eran if (src_addr) { 11220c505f70SHaggai Eran ib = (struct sockaddr_ib *)src_addr; 11230c505f70SHaggai Eran ib->sib_family = AF_IB; 1124c07678bbSMatthew Finlay if (path) { 1125fbaa1a6dSSean Hefty ib->sib_pkey = path->pkey; 1126fbaa1a6dSSean Hefty ib->sib_flowinfo = path->flow_label; 1127fbaa1a6dSSean Hefty memcpy(&ib->sib_addr, &path->sgid, 16); 1128d3957b86SMajd Dibbiny ib->sib_sid = path->service_id; 11290c505f70SHaggai Eran ib->sib_scope_id = 0; 1130c07678bbSMatthew Finlay } else { 1131c07678bbSMatthew Finlay ib->sib_pkey = listen_ib->sib_pkey; 1132c07678bbSMatthew Finlay ib->sib_flowinfo = listen_ib->sib_flowinfo; 1133c07678bbSMatthew Finlay ib->sib_addr = listen_ib->sib_addr; 1134fbaa1a6dSSean Hefty ib->sib_sid = listen_ib->sib_sid; 1135fbaa1a6dSSean Hefty ib->sib_scope_id = listen_ib->sib_scope_id; 11360c505f70SHaggai Eran } 11370c505f70SHaggai Eran ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL); 11380c505f70SHaggai Eran } 11390c505f70SHaggai Eran if (dst_addr) { 11400c505f70SHaggai Eran ib = (struct sockaddr_ib *)dst_addr; 11410c505f70SHaggai Eran ib->sib_family = AF_IB; 1142c07678bbSMatthew Finlay if (path) { 1143fbaa1a6dSSean Hefty ib->sib_pkey = path->pkey; 1144fbaa1a6dSSean Hefty ib->sib_flowinfo = path->flow_label; 1145fbaa1a6dSSean Hefty memcpy(&ib->sib_addr, &path->dgid, 16); 1146fbaa1a6dSSean Hefty } 1147c07678bbSMatthew Finlay } 114828521440SJason Gunthorpe } 114928521440SJason Gunthorpe 1150c50e90d0SArnd Bergmann static void cma_save_ip4_info(struct sockaddr_in *src_addr, 1151c50e90d0SArnd Bergmann struct sockaddr_in *dst_addr, 11520c505f70SHaggai Eran struct cma_hdr *hdr, 11530c505f70SHaggai Eran __be16 local_port) 1154fbaa1a6dSSean Hefty { 11550c505f70SHaggai Eran if (src_addr) { 1156c50e90d0SArnd Bergmann *src_addr = (struct sockaddr_in) { 1157c50e90d0SArnd Bergmann .sin_family = AF_INET, 1158c50e90d0SArnd Bergmann .sin_addr.s_addr = hdr->dst_addr.ip4.addr, 1159c50e90d0SArnd Bergmann .sin_port = local_port, 1160c50e90d0SArnd Bergmann }; 11610c505f70SHaggai Eran } 1162fbaa1a6dSSean Hefty 11630c505f70SHaggai Eran if (dst_addr) { 1164c50e90d0SArnd Bergmann *dst_addr = (struct sockaddr_in) { 1165c50e90d0SArnd Bergmann .sin_family = AF_INET, 1166c50e90d0SArnd Bergmann .sin_addr.s_addr = hdr->src_addr.ip4.addr, 1167c50e90d0SArnd Bergmann .sin_port = hdr->port, 1168c50e90d0SArnd Bergmann }; 1169fbaa1a6dSSean Hefty } 11700c505f70SHaggai Eran } 1171fbaa1a6dSSean Hefty 1172c50e90d0SArnd Bergmann static void cma_save_ip6_info(struct sockaddr_in6 *src_addr, 1173c50e90d0SArnd Bergmann struct sockaddr_in6 *dst_addr, 11740c505f70SHaggai Eran struct cma_hdr *hdr, 11750c505f70SHaggai Eran __be16 local_port) 1176fbaa1a6dSSean Hefty { 11770c505f70SHaggai Eran if (src_addr) { 1178c50e90d0SArnd Bergmann *src_addr = (struct sockaddr_in6) { 1179c50e90d0SArnd Bergmann .sin6_family = AF_INET6, 1180c50e90d0SArnd Bergmann .sin6_addr = hdr->dst_addr.ip6, 1181c50e90d0SArnd Bergmann .sin6_port = local_port, 1182c50e90d0SArnd Bergmann }; 11830c505f70SHaggai Eran } 1184fbaa1a6dSSean Hefty 11850c505f70SHaggai Eran if (dst_addr) { 1186c50e90d0SArnd Bergmann *dst_addr = (struct sockaddr_in6) { 1187c50e90d0SArnd Bergmann .sin6_family = AF_INET6, 1188c50e90d0SArnd Bergmann .sin6_addr = hdr->src_addr.ip6, 1189c50e90d0SArnd Bergmann .sin6_port = hdr->port, 1190c50e90d0SArnd Bergmann }; 1191fbaa1a6dSSean Hefty } 11920c505f70SHaggai Eran } 1193fbaa1a6dSSean Hefty 11940c505f70SHaggai Eran static u16 cma_port_from_service_id(__be64 service_id) 11950c505f70SHaggai Eran { 11960c505f70SHaggai Eran return (u16)be64_to_cpu(service_id); 11970c505f70SHaggai Eran } 11980c505f70SHaggai Eran 11990c505f70SHaggai Eran static int cma_save_ip_info(struct sockaddr *src_addr, 12000c505f70SHaggai Eran struct sockaddr *dst_addr, 12010c505f70SHaggai Eran struct ib_cm_event *ib_event, 12020c505f70SHaggai Eran __be64 service_id) 1203fbaa1a6dSSean Hefty { 1204fbaa1a6dSSean Hefty struct cma_hdr *hdr; 12050c505f70SHaggai Eran __be16 port; 1206e51060f0SSean Hefty 1207fbaa1a6dSSean Hefty hdr = ib_event->private_data; 1208fbaa1a6dSSean Hefty if (hdr->cma_version != CMA_VERSION) 1209fbaa1a6dSSean Hefty return -EINVAL; 1210e51060f0SSean Hefty 12110c505f70SHaggai Eran port = htons(cma_port_from_service_id(service_id)); 12120c505f70SHaggai Eran 1213fbaa1a6dSSean Hefty switch (cma_get_ip_ver(hdr)) { 1214e51060f0SSean Hefty case 4: 1215c50e90d0SArnd Bergmann cma_save_ip4_info((struct sockaddr_in *)src_addr, 1216c50e90d0SArnd Bergmann (struct sockaddr_in *)dst_addr, hdr, port); 1217e51060f0SSean Hefty break; 1218e51060f0SSean Hefty case 6: 1219c50e90d0SArnd Bergmann cma_save_ip6_info((struct sockaddr_in6 *)src_addr, 1220c50e90d0SArnd Bergmann (struct sockaddr_in6 *)dst_addr, hdr, port); 1221e51060f0SSean Hefty break; 1222e51060f0SSean Hefty default: 12234c21b5bcSHaggai Eran return -EAFNOSUPPORT; 1224e51060f0SSean Hefty } 12250c505f70SHaggai Eran 1226fbaa1a6dSSean Hefty return 0; 1227e51060f0SSean Hefty } 1228e51060f0SSean Hefty 12290c505f70SHaggai Eran static int cma_save_net_info(struct sockaddr *src_addr, 12300c505f70SHaggai Eran struct sockaddr *dst_addr, 12310c505f70SHaggai Eran struct rdma_cm_id *listen_id, 12320c505f70SHaggai Eran struct ib_cm_event *ib_event, 12330c505f70SHaggai Eran sa_family_t sa_family, __be64 service_id) 12340c505f70SHaggai Eran { 12350c505f70SHaggai Eran if (sa_family == AF_IB) { 12360c505f70SHaggai Eran if (ib_event->event == IB_CM_REQ_RECEIVED) 12370c505f70SHaggai Eran cma_save_ib_info(src_addr, dst_addr, listen_id, 12380c505f70SHaggai Eran ib_event->param.req_rcvd.primary_path); 12390c505f70SHaggai Eran else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) 12400c505f70SHaggai Eran cma_save_ib_info(src_addr, dst_addr, listen_id, NULL); 12410c505f70SHaggai Eran return 0; 12420c505f70SHaggai Eran } 12430c505f70SHaggai Eran 12440c505f70SHaggai Eran return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id); 12450c505f70SHaggai Eran } 12460c505f70SHaggai Eran 12474c21b5bcSHaggai Eran static int cma_save_req_info(const struct ib_cm_event *ib_event, 12484c21b5bcSHaggai Eran struct cma_req_info *req) 12494c21b5bcSHaggai Eran { 12504c21b5bcSHaggai Eran const struct ib_cm_req_event_param *req_param = 12514c21b5bcSHaggai Eran &ib_event->param.req_rcvd; 12524c21b5bcSHaggai Eran const struct ib_cm_sidr_req_event_param *sidr_param = 12534c21b5bcSHaggai Eran &ib_event->param.sidr_req_rcvd; 12544c21b5bcSHaggai Eran 12554c21b5bcSHaggai Eran switch (ib_event->event) { 12564c21b5bcSHaggai Eran case IB_CM_REQ_RECEIVED: 12574c21b5bcSHaggai Eran req->device = req_param->listen_id->device; 12584c21b5bcSHaggai Eran req->port = req_param->port; 12594c21b5bcSHaggai Eran memcpy(&req->local_gid, &req_param->primary_path->sgid, 12604c21b5bcSHaggai Eran sizeof(req->local_gid)); 12614c21b5bcSHaggai Eran req->has_gid = true; 1262d3957b86SMajd Dibbiny req->service_id = req_param->primary_path->service_id; 1263ab3964adSHaggai Eran req->pkey = be16_to_cpu(req_param->primary_path->pkey); 126484424a7fSHaggai Eran if (req->pkey != req_param->bth_pkey) 126584424a7fSHaggai Eran pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n" 126684424a7fSHaggai Eran "RDMA CMA: in the future this may cause the request to be dropped\n", 126784424a7fSHaggai Eran req_param->bth_pkey, req->pkey); 12684c21b5bcSHaggai Eran break; 12694c21b5bcSHaggai Eran case IB_CM_SIDR_REQ_RECEIVED: 12704c21b5bcSHaggai Eran req->device = sidr_param->listen_id->device; 12714c21b5bcSHaggai Eran req->port = sidr_param->port; 12724c21b5bcSHaggai Eran req->has_gid = false; 12734c21b5bcSHaggai Eran req->service_id = sidr_param->service_id; 1274ab3964adSHaggai Eran req->pkey = sidr_param->pkey; 127584424a7fSHaggai Eran if (req->pkey != sidr_param->bth_pkey) 127684424a7fSHaggai Eran pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n" 127784424a7fSHaggai Eran "RDMA CMA: in the future this may cause the request to be dropped\n", 127884424a7fSHaggai Eran sidr_param->bth_pkey, req->pkey); 12794c21b5bcSHaggai Eran break; 12804c21b5bcSHaggai Eran default: 12814c21b5bcSHaggai Eran return -EINVAL; 12824c21b5bcSHaggai Eran } 12834c21b5bcSHaggai Eran 12844c21b5bcSHaggai Eran return 0; 12854c21b5bcSHaggai Eran } 12864c21b5bcSHaggai Eran 1287f887f2acSHaggai Eran static bool validate_ipv4_net_dev(struct net_device *net_dev, 1288f887f2acSHaggai Eran const struct sockaddr_in *dst_addr, 1289f887f2acSHaggai Eran const struct sockaddr_in *src_addr) 1290f887f2acSHaggai Eran { 1291f887f2acSHaggai Eran __be32 daddr = dst_addr->sin_addr.s_addr, 1292f887f2acSHaggai Eran saddr = src_addr->sin_addr.s_addr; 1293f887f2acSHaggai Eran struct fib_result res; 1294f887f2acSHaggai Eran struct flowi4 fl4; 1295f887f2acSHaggai Eran int err; 1296f887f2acSHaggai Eran bool ret; 1297f887f2acSHaggai Eran 1298f887f2acSHaggai Eran if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) || 1299f887f2acSHaggai Eran ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) || 1300f887f2acSHaggai Eran ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) || 1301f887f2acSHaggai Eran ipv4_is_loopback(saddr)) 1302f887f2acSHaggai Eran return false; 1303f887f2acSHaggai Eran 1304f887f2acSHaggai Eran memset(&fl4, 0, sizeof(fl4)); 1305f887f2acSHaggai Eran fl4.flowi4_iif = net_dev->ifindex; 1306f887f2acSHaggai Eran fl4.daddr = daddr; 1307f887f2acSHaggai Eran fl4.saddr = saddr; 1308f887f2acSHaggai Eran 1309f887f2acSHaggai Eran rcu_read_lock(); 1310f887f2acSHaggai Eran err = fib_lookup(dev_net(net_dev), &fl4, &res, 0); 1311d3632493SBart Van Assche ret = err == 0 && FIB_RES_DEV(res) == net_dev; 1312f887f2acSHaggai Eran rcu_read_unlock(); 1313f887f2acSHaggai Eran 1314f887f2acSHaggai Eran return ret; 1315f887f2acSHaggai Eran } 1316f887f2acSHaggai Eran 1317f887f2acSHaggai Eran static bool validate_ipv6_net_dev(struct net_device *net_dev, 1318f887f2acSHaggai Eran const struct sockaddr_in6 *dst_addr, 1319f887f2acSHaggai Eran const struct sockaddr_in6 *src_addr) 1320f887f2acSHaggai Eran { 1321f887f2acSHaggai Eran #if IS_ENABLED(CONFIG_IPV6) 1322f887f2acSHaggai Eran const int strict = ipv6_addr_type(&dst_addr->sin6_addr) & 1323f887f2acSHaggai Eran IPV6_ADDR_LINKLOCAL; 1324f887f2acSHaggai Eran struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr, 1325f887f2acSHaggai Eran &src_addr->sin6_addr, net_dev->ifindex, 1326b75cc8f9SDavid Ahern NULL, strict); 1327f887f2acSHaggai Eran bool ret; 1328f887f2acSHaggai Eran 1329f887f2acSHaggai Eran if (!rt) 1330f887f2acSHaggai Eran return false; 1331f887f2acSHaggai Eran 1332f887f2acSHaggai Eran ret = rt->rt6i_idev->dev == net_dev; 1333f887f2acSHaggai Eran ip6_rt_put(rt); 1334f887f2acSHaggai Eran 1335f887f2acSHaggai Eran return ret; 1336f887f2acSHaggai Eran #else 1337f887f2acSHaggai Eran return false; 1338f887f2acSHaggai Eran #endif 1339f887f2acSHaggai Eran } 1340f887f2acSHaggai Eran 1341f887f2acSHaggai Eran static bool validate_net_dev(struct net_device *net_dev, 1342f887f2acSHaggai Eran const struct sockaddr *daddr, 1343f887f2acSHaggai Eran const struct sockaddr *saddr) 1344f887f2acSHaggai Eran { 1345f887f2acSHaggai Eran const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr; 1346f887f2acSHaggai Eran const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr; 1347f887f2acSHaggai Eran const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr; 1348f887f2acSHaggai Eran const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr; 1349f887f2acSHaggai Eran 1350f887f2acSHaggai Eran switch (daddr->sa_family) { 1351f887f2acSHaggai Eran case AF_INET: 1352f887f2acSHaggai Eran return saddr->sa_family == AF_INET && 1353f887f2acSHaggai Eran validate_ipv4_net_dev(net_dev, daddr4, saddr4); 1354f887f2acSHaggai Eran 1355f887f2acSHaggai Eran case AF_INET6: 1356f887f2acSHaggai Eran return saddr->sa_family == AF_INET6 && 1357f887f2acSHaggai Eran validate_ipv6_net_dev(net_dev, daddr6, saddr6); 1358f887f2acSHaggai Eran 1359f887f2acSHaggai Eran default: 1360f887f2acSHaggai Eran return false; 1361f887f2acSHaggai Eran } 1362f887f2acSHaggai Eran } 1363f887f2acSHaggai Eran 13644c21b5bcSHaggai Eran static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event, 13652918c1a9SParav Pandit struct cma_req_info *req) 13664c21b5bcSHaggai Eran { 13672918c1a9SParav Pandit struct sockaddr *listen_addr = 13682918c1a9SParav Pandit (struct sockaddr *)&req->listen_addr_storage; 13692918c1a9SParav Pandit struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage; 13704c21b5bcSHaggai Eran struct net_device *net_dev; 13714c21b5bcSHaggai Eran const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL; 13724c21b5bcSHaggai Eran int err; 13734c21b5bcSHaggai Eran 1374f887f2acSHaggai Eran err = cma_save_ip_info(listen_addr, src_addr, ib_event, 1375f887f2acSHaggai Eran req->service_id); 13764c21b5bcSHaggai Eran if (err) 13774c21b5bcSHaggai Eran return ERR_PTR(err); 13784c21b5bcSHaggai Eran 13794c21b5bcSHaggai Eran net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey, 13804c21b5bcSHaggai Eran gid, listen_addr); 13814c21b5bcSHaggai Eran if (!net_dev) 13824c21b5bcSHaggai Eran return ERR_PTR(-ENODEV); 13834c21b5bcSHaggai Eran 13844c21b5bcSHaggai Eran return net_dev; 13854c21b5bcSHaggai Eran } 13864c21b5bcSHaggai Eran 13872253fc0cSSteve Wise static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id) 13884c21b5bcSHaggai Eran { 13894c21b5bcSHaggai Eran return (be64_to_cpu(service_id) >> 16) & 0xffff; 13904c21b5bcSHaggai Eran } 13914c21b5bcSHaggai Eran 13924c21b5bcSHaggai Eran static bool cma_match_private_data(struct rdma_id_private *id_priv, 13934c21b5bcSHaggai Eran const struct cma_hdr *hdr) 13944c21b5bcSHaggai Eran { 13954c21b5bcSHaggai Eran struct sockaddr *addr = cma_src_addr(id_priv); 13964c21b5bcSHaggai Eran __be32 ip4_addr; 13974c21b5bcSHaggai Eran struct in6_addr ip6_addr; 13984c21b5bcSHaggai Eran 13994c21b5bcSHaggai Eran if (cma_any_addr(addr) && !id_priv->afonly) 14004c21b5bcSHaggai Eran return true; 14014c21b5bcSHaggai Eran 14024c21b5bcSHaggai Eran switch (addr->sa_family) { 14034c21b5bcSHaggai Eran case AF_INET: 14044c21b5bcSHaggai Eran ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; 14054c21b5bcSHaggai Eran if (cma_get_ip_ver(hdr) != 4) 14064c21b5bcSHaggai Eran return false; 14074c21b5bcSHaggai Eran if (!cma_any_addr(addr) && 14084c21b5bcSHaggai Eran hdr->dst_addr.ip4.addr != ip4_addr) 14094c21b5bcSHaggai Eran return false; 14104c21b5bcSHaggai Eran break; 14114c21b5bcSHaggai Eran case AF_INET6: 14124c21b5bcSHaggai Eran ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr; 14134c21b5bcSHaggai Eran if (cma_get_ip_ver(hdr) != 6) 14144c21b5bcSHaggai Eran return false; 14154c21b5bcSHaggai Eran if (!cma_any_addr(addr) && 14164c21b5bcSHaggai Eran memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr))) 14174c21b5bcSHaggai Eran return false; 14184c21b5bcSHaggai Eran break; 14194c21b5bcSHaggai Eran case AF_IB: 14204c21b5bcSHaggai Eran return true; 14214c21b5bcSHaggai Eran default: 14224c21b5bcSHaggai Eran return false; 14234c21b5bcSHaggai Eran } 14244c21b5bcSHaggai Eran 14254c21b5bcSHaggai Eran return true; 14264c21b5bcSHaggai Eran } 14274c21b5bcSHaggai Eran 1428b8cab5daSHaggai Eran static bool cma_protocol_roce(const struct rdma_cm_id *id) 1429b8cab5daSHaggai Eran { 1430b8cab5daSHaggai Eran struct ib_device *device = id->device; 1431b8cab5daSHaggai Eran const int port_num = id->port_num ?: rdma_start_port(device); 1432b8cab5daSHaggai Eran 14335ac08a34SParav Pandit return rdma_protocol_roce(device, port_num); 1434b8cab5daSHaggai Eran } 1435b8cab5daSHaggai Eran 1436fac51590SMatan Barak static bool cma_match_net_dev(const struct rdma_cm_id *id, 1437fac51590SMatan Barak const struct net_device *net_dev, 1438fac51590SMatan Barak u8 port_num) 14394c21b5bcSHaggai Eran { 1440fac51590SMatan Barak const struct rdma_addr *addr = &id->route.addr; 14414c21b5bcSHaggai Eran 14424c21b5bcSHaggai Eran if (!net_dev) 1443b8cab5daSHaggai Eran /* This request is an AF_IB request or a RoCE request */ 1444fac51590SMatan Barak return (!id->port_num || id->port_num == port_num) && 1445fac51590SMatan Barak (addr->src_addr.ss_family == AF_IB || 14465ac08a34SParav Pandit rdma_protocol_roce(id->device, port_num)); 14474c21b5bcSHaggai Eran 14484c21b5bcSHaggai Eran return !addr->dev_addr.bound_dev_if || 1449fa20105eSGuy Shapiro (net_eq(dev_net(net_dev), addr->dev_addr.net) && 14504c21b5bcSHaggai Eran addr->dev_addr.bound_dev_if == net_dev->ifindex); 14514c21b5bcSHaggai Eran } 14524c21b5bcSHaggai Eran 14534c21b5bcSHaggai Eran static struct rdma_id_private *cma_find_listener( 14544c21b5bcSHaggai Eran const struct rdma_bind_list *bind_list, 14554c21b5bcSHaggai Eran const struct ib_cm_id *cm_id, 14564c21b5bcSHaggai Eran const struct ib_cm_event *ib_event, 14574c21b5bcSHaggai Eran const struct cma_req_info *req, 14584c21b5bcSHaggai Eran const struct net_device *net_dev) 14594c21b5bcSHaggai Eran { 14604c21b5bcSHaggai Eran struct rdma_id_private *id_priv, *id_priv_dev; 14614c21b5bcSHaggai Eran 14624c21b5bcSHaggai Eran if (!bind_list) 14634c21b5bcSHaggai Eran return ERR_PTR(-EINVAL); 14644c21b5bcSHaggai Eran 14654c21b5bcSHaggai Eran hlist_for_each_entry(id_priv, &bind_list->owners, node) { 14664c21b5bcSHaggai Eran if (cma_match_private_data(id_priv, ib_event->private_data)) { 14674c21b5bcSHaggai Eran if (id_priv->id.device == cm_id->device && 1468fac51590SMatan Barak cma_match_net_dev(&id_priv->id, net_dev, req->port)) 14694c21b5bcSHaggai Eran return id_priv; 14704c21b5bcSHaggai Eran list_for_each_entry(id_priv_dev, 14714c21b5bcSHaggai Eran &id_priv->listen_list, 14724c21b5bcSHaggai Eran listen_list) { 14734c21b5bcSHaggai Eran if (id_priv_dev->id.device == cm_id->device && 1474fac51590SMatan Barak cma_match_net_dev(&id_priv_dev->id, net_dev, req->port)) 14754c21b5bcSHaggai Eran return id_priv_dev; 14764c21b5bcSHaggai Eran } 14774c21b5bcSHaggai Eran } 14784c21b5bcSHaggai Eran } 14794c21b5bcSHaggai Eran 14804c21b5bcSHaggai Eran return ERR_PTR(-EINVAL); 14814c21b5bcSHaggai Eran } 14824c21b5bcSHaggai Eran 14834c21b5bcSHaggai Eran static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id, 14840b3ca768SHaggai Eran struct ib_cm_event *ib_event, 14850b3ca768SHaggai Eran struct net_device **net_dev) 14864c21b5bcSHaggai Eran { 14874c21b5bcSHaggai Eran struct cma_req_info req; 14884c21b5bcSHaggai Eran struct rdma_bind_list *bind_list; 14894c21b5bcSHaggai Eran struct rdma_id_private *id_priv; 14904c21b5bcSHaggai Eran int err; 14914c21b5bcSHaggai Eran 14924c21b5bcSHaggai Eran err = cma_save_req_info(ib_event, &req); 14934c21b5bcSHaggai Eran if (err) 14944c21b5bcSHaggai Eran return ERR_PTR(err); 14954c21b5bcSHaggai Eran 14960b3ca768SHaggai Eran *net_dev = cma_get_net_dev(ib_event, &req); 14970b3ca768SHaggai Eran if (IS_ERR(*net_dev)) { 14980b3ca768SHaggai Eran if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) { 14994c21b5bcSHaggai Eran /* Assuming the protocol is AF_IB */ 15000b3ca768SHaggai Eran *net_dev = NULL; 15015ac08a34SParav Pandit } else if (rdma_protocol_roce(req.device, req.port)) { 1502b8cab5daSHaggai Eran /* TODO find the net dev matching the request parameters 1503b8cab5daSHaggai Eran * through the RoCE GID table */ 1504b8cab5daSHaggai Eran *net_dev = NULL; 15054c21b5bcSHaggai Eran } else { 15060b3ca768SHaggai Eran return ERR_CAST(*net_dev); 15074c21b5bcSHaggai Eran } 15084c21b5bcSHaggai Eran } 15094c21b5bcSHaggai Eran 15102918c1a9SParav Pandit /* 15112918c1a9SParav Pandit * Net namespace might be getting deleted while route lookup, 15122918c1a9SParav Pandit * cm_id lookup is in progress. Therefore, perform netdevice 15132918c1a9SParav Pandit * validation, cm_id lookup under rcu lock. 15142918c1a9SParav Pandit * RCU lock along with netdevice state check, synchronizes with 15152918c1a9SParav Pandit * netdevice migrating to different net namespace and also avoids 15162918c1a9SParav Pandit * case where net namespace doesn't get deleted while lookup is in 15172918c1a9SParav Pandit * progress. 15182918c1a9SParav Pandit * If the device state is not IFF_UP, its properties such as ifindex 15192918c1a9SParav Pandit * and nd_net cannot be trusted to remain valid without rcu lock. 15202918c1a9SParav Pandit * net/core/dev.c change_net_namespace() ensures to synchronize with 15212918c1a9SParav Pandit * ongoing operations on net device after device is closed using 15222918c1a9SParav Pandit * synchronize_net(). 15232918c1a9SParav Pandit */ 15242918c1a9SParav Pandit rcu_read_lock(); 15252918c1a9SParav Pandit if (*net_dev) { 15262918c1a9SParav Pandit /* 15272918c1a9SParav Pandit * If netdevice is down, it is likely that it is administratively 15282918c1a9SParav Pandit * down or it might be migrating to different namespace. 15292918c1a9SParav Pandit * In that case avoid further processing, as the net namespace 15302918c1a9SParav Pandit * or ifindex may change. 15312918c1a9SParav Pandit */ 15322918c1a9SParav Pandit if (((*net_dev)->flags & IFF_UP) == 0) { 15332918c1a9SParav Pandit id_priv = ERR_PTR(-EHOSTUNREACH); 15342918c1a9SParav Pandit goto err; 15352918c1a9SParav Pandit } 15362918c1a9SParav Pandit 15372918c1a9SParav Pandit if (!validate_net_dev(*net_dev, 15382918c1a9SParav Pandit (struct sockaddr *)&req.listen_addr_storage, 15392918c1a9SParav Pandit (struct sockaddr *)&req.src_addr_storage)) { 15402918c1a9SParav Pandit id_priv = ERR_PTR(-EHOSTUNREACH); 15412918c1a9SParav Pandit goto err; 15422918c1a9SParav Pandit } 15432918c1a9SParav Pandit } 15442918c1a9SParav Pandit 1545fa20105eSGuy Shapiro bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net, 15464be74b42SHaggai Eran rdma_ps_from_service_id(req.service_id), 15474c21b5bcSHaggai Eran cma_port_from_service_id(req.service_id)); 15480b3ca768SHaggai Eran id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev); 15492918c1a9SParav Pandit err: 15502918c1a9SParav Pandit rcu_read_unlock(); 1551b3b51f9fSHaggai Eran if (IS_ERR(id_priv) && *net_dev) { 1552be688195SHaggai Eran dev_put(*net_dev); 1553be688195SHaggai Eran *net_dev = NULL; 1554be688195SHaggai Eran } 15554c21b5bcSHaggai Eran return id_priv; 15564c21b5bcSHaggai Eran } 15574c21b5bcSHaggai Eran 1558c0b64f58SBart Van Assche static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv) 1559e51060f0SSean Hefty { 1560e8160e15SSean Hefty return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); 1561e51060f0SSean Hefty } 1562e51060f0SSean Hefty 1563e51060f0SSean Hefty static void cma_cancel_route(struct rdma_id_private *id_priv) 1564e51060f0SSean Hefty { 1565fe53ba2fSMichael Wang if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) { 1566e51060f0SSean Hefty if (id_priv->query) 1567e51060f0SSean Hefty ib_sa_cancel_query(id_priv->query_id, id_priv->query); 1568e51060f0SSean Hefty } 1569e51060f0SSean Hefty } 1570e51060f0SSean Hefty 1571e51060f0SSean Hefty static void cma_cancel_listens(struct rdma_id_private *id_priv) 1572e51060f0SSean Hefty { 1573e51060f0SSean Hefty struct rdma_id_private *dev_id_priv; 1574e51060f0SSean Hefty 1575d02d1f53SSean Hefty /* 1576d02d1f53SSean Hefty * Remove from listen_any_list to prevent added devices from spawning 1577d02d1f53SSean Hefty * additional listen requests. 1578d02d1f53SSean Hefty */ 1579e51060f0SSean Hefty mutex_lock(&lock); 1580e51060f0SSean Hefty list_del(&id_priv->list); 1581e51060f0SSean Hefty 1582e51060f0SSean Hefty while (!list_empty(&id_priv->listen_list)) { 1583e51060f0SSean Hefty dev_id_priv = list_entry(id_priv->listen_list.next, 1584e51060f0SSean Hefty struct rdma_id_private, listen_list); 1585d02d1f53SSean Hefty /* sync with device removal to avoid duplicate destruction */ 1586d02d1f53SSean Hefty list_del_init(&dev_id_priv->list); 1587d02d1f53SSean Hefty list_del(&dev_id_priv->listen_list); 1588d02d1f53SSean Hefty mutex_unlock(&lock); 1589d02d1f53SSean Hefty 1590d02d1f53SSean Hefty rdma_destroy_id(&dev_id_priv->id); 1591d02d1f53SSean Hefty mutex_lock(&lock); 1592e51060f0SSean Hefty } 1593e51060f0SSean Hefty mutex_unlock(&lock); 1594e51060f0SSean Hefty } 1595e51060f0SSean Hefty 1596e51060f0SSean Hefty static void cma_cancel_operation(struct rdma_id_private *id_priv, 1597550e5ca7SNir Muchtar enum rdma_cm_state state) 1598e51060f0SSean Hefty { 1599e51060f0SSean Hefty switch (state) { 1600550e5ca7SNir Muchtar case RDMA_CM_ADDR_QUERY: 1601e51060f0SSean Hefty rdma_addr_cancel(&id_priv->id.route.addr.dev_addr); 1602e51060f0SSean Hefty break; 1603550e5ca7SNir Muchtar case RDMA_CM_ROUTE_QUERY: 1604e51060f0SSean Hefty cma_cancel_route(id_priv); 1605e51060f0SSean Hefty break; 1606550e5ca7SNir Muchtar case RDMA_CM_LISTEN: 1607f4753834SSean Hefty if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) 1608e51060f0SSean Hefty cma_cancel_listens(id_priv); 1609e51060f0SSean Hefty break; 1610e51060f0SSean Hefty default: 1611e51060f0SSean Hefty break; 1612e51060f0SSean Hefty } 1613e51060f0SSean Hefty } 1614e51060f0SSean Hefty 1615e51060f0SSean Hefty static void cma_release_port(struct rdma_id_private *id_priv) 1616e51060f0SSean Hefty { 1617e51060f0SSean Hefty struct rdma_bind_list *bind_list = id_priv->bind_list; 1618fa20105eSGuy Shapiro struct net *net = id_priv->id.route.addr.dev_addr.net; 1619e51060f0SSean Hefty 1620e51060f0SSean Hefty if (!bind_list) 1621e51060f0SSean Hefty return; 1622e51060f0SSean Hefty 1623e51060f0SSean Hefty mutex_lock(&lock); 1624e51060f0SSean Hefty hlist_del(&id_priv->node); 1625e51060f0SSean Hefty if (hlist_empty(&bind_list->owners)) { 1626fa20105eSGuy Shapiro cma_ps_remove(net, bind_list->ps, bind_list->port); 1627e51060f0SSean Hefty kfree(bind_list); 1628e51060f0SSean Hefty } 1629e51060f0SSean Hefty mutex_unlock(&lock); 1630e51060f0SSean Hefty } 1631e51060f0SSean Hefty 1632c8f6a362SSean Hefty static void cma_leave_mc_groups(struct rdma_id_private *id_priv) 1633c8f6a362SSean Hefty { 1634c8f6a362SSean Hefty struct cma_multicast *mc; 1635c8f6a362SSean Hefty 1636c8f6a362SSean Hefty while (!list_empty(&id_priv->mc_list)) { 1637c8f6a362SSean Hefty mc = container_of(id_priv->mc_list.next, 1638c8f6a362SSean Hefty struct cma_multicast, list); 1639c8f6a362SSean Hefty list_del(&mc->list); 1640a31ad3b0SMichael Wang if (rdma_cap_ib_mcast(id_priv->cma_dev->device, 16415c9a5282SMichael Wang id_priv->id.port_num)) { 1642c8f6a362SSean Hefty ib_sa_free_multicast(mc->multicast.ib); 1643c8f6a362SSean Hefty kfree(mc); 1644bee3c3c9SMoni Shoua } else { 1645bee3c3c9SMoni Shoua if (mc->igmp_joined) { 1646bee3c3c9SMoni Shoua struct rdma_dev_addr *dev_addr = 1647bee3c3c9SMoni Shoua &id_priv->id.route.addr.dev_addr; 1648bee3c3c9SMoni Shoua struct net_device *ndev = NULL; 1649bee3c3c9SMoni Shoua 1650bee3c3c9SMoni Shoua if (dev_addr->bound_dev_if) 1651bee3c3c9SMoni Shoua ndev = dev_get_by_index(&init_net, 1652bee3c3c9SMoni Shoua dev_addr->bound_dev_if); 1653bee3c3c9SMoni Shoua if (ndev) { 1654bee3c3c9SMoni Shoua cma_igmp_send(ndev, 1655bee3c3c9SMoni Shoua &mc->multicast.ib->rec.mgid, 1656bee3c3c9SMoni Shoua false); 1657bee3c3c9SMoni Shoua dev_put(ndev); 1658bee3c3c9SMoni Shoua } 1659bee3c3c9SMoni Shoua } 16603c86aa70SEli Cohen kref_put(&mc->mcref, release_mc); 1661c8f6a362SSean Hefty } 1662c8f6a362SSean Hefty } 1663bee3c3c9SMoni Shoua } 1664c8f6a362SSean Hefty 1665e51060f0SSean Hefty void rdma_destroy_id(struct rdma_cm_id *id) 1666e51060f0SSean Hefty { 1667e51060f0SSean Hefty struct rdma_id_private *id_priv; 1668550e5ca7SNir Muchtar enum rdma_cm_state state; 1669e51060f0SSean Hefty 1670e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 1671550e5ca7SNir Muchtar state = cma_exch(id_priv, RDMA_CM_DESTROYING); 1672e51060f0SSean Hefty cma_cancel_operation(id_priv, state); 1673e51060f0SSean Hefty 1674a396d43aSSean Hefty /* 1675a396d43aSSean Hefty * Wait for any active callback to finish. New callbacks will find 1676a396d43aSSean Hefty * the id_priv state set to destroying and abort. 1677a396d43aSSean Hefty */ 1678a396d43aSSean Hefty mutex_lock(&id_priv->handler_mutex); 1679a396d43aSSean Hefty mutex_unlock(&id_priv->handler_mutex); 1680a396d43aSSean Hefty 1681e51060f0SSean Hefty if (id_priv->cma_dev) { 168200313983SSteve Wise rdma_restrack_del(&id_priv->res); 168372219ceaSMichael Wang if (rdma_cap_ib_cm(id_priv->id.device, 1)) { 16840c9361fcSJack Morgenstein if (id_priv->cm_id.ib) 1685e51060f0SSean Hefty ib_destroy_cm_id(id_priv->cm_id.ib); 168604215330SMichael Wang } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) { 16870c9361fcSJack Morgenstein if (id_priv->cm_id.iw) 168807ebafbaSTom Tucker iw_destroy_cm_id(id_priv->cm_id.iw); 1689e51060f0SSean Hefty } 1690c8f6a362SSean Hefty cma_leave_mc_groups(id_priv); 1691a396d43aSSean Hefty cma_release_dev(id_priv); 1692e51060f0SSean Hefty } 1693e51060f0SSean Hefty 1694e51060f0SSean Hefty cma_release_port(id_priv); 1695e51060f0SSean Hefty cma_deref_id(id_priv); 1696e51060f0SSean Hefty wait_for_completion(&id_priv->comp); 1697e51060f0SSean Hefty 1698d02d1f53SSean Hefty if (id_priv->internal_id) 1699d02d1f53SSean Hefty cma_deref_id(id_priv->id.context); 1700d02d1f53SSean Hefty 1701e51060f0SSean Hefty kfree(id_priv->id.route.path_rec); 1702fa20105eSGuy Shapiro put_net(id_priv->id.route.addr.dev_addr.net); 1703e51060f0SSean Hefty kfree(id_priv); 1704e51060f0SSean Hefty } 1705e51060f0SSean Hefty EXPORT_SYMBOL(rdma_destroy_id); 1706e51060f0SSean Hefty 1707e51060f0SSean Hefty static int cma_rep_recv(struct rdma_id_private *id_priv) 1708e51060f0SSean Hefty { 1709e51060f0SSean Hefty int ret; 1710e51060f0SSean Hefty 17115851bb89SSean Hefty ret = cma_modify_qp_rtr(id_priv, NULL); 1712e51060f0SSean Hefty if (ret) 1713e51060f0SSean Hefty goto reject; 1714e51060f0SSean Hefty 17155851bb89SSean Hefty ret = cma_modify_qp_rts(id_priv, NULL); 1716e51060f0SSean Hefty if (ret) 1717e51060f0SSean Hefty goto reject; 1718e51060f0SSean Hefty 1719e51060f0SSean Hefty ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0); 1720e51060f0SSean Hefty if (ret) 1721e51060f0SSean Hefty goto reject; 1722e51060f0SSean Hefty 1723e51060f0SSean Hefty return 0; 1724e51060f0SSean Hefty reject: 1725498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret); 1726c5483388SSean Hefty cma_modify_qp_err(id_priv); 1727e51060f0SSean Hefty ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED, 1728e51060f0SSean Hefty NULL, 0, NULL, 0); 1729e51060f0SSean Hefty return ret; 1730e51060f0SSean Hefty } 1731e51060f0SSean Hefty 1732a1b1b61fSSean Hefty static void cma_set_rep_event_data(struct rdma_cm_event *event, 1733a1b1b61fSSean Hefty struct ib_cm_rep_event_param *rep_data, 1734a1b1b61fSSean Hefty void *private_data) 1735a1b1b61fSSean Hefty { 1736a1b1b61fSSean Hefty event->param.conn.private_data = private_data; 1737a1b1b61fSSean Hefty event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE; 1738a1b1b61fSSean Hefty event->param.conn.responder_resources = rep_data->responder_resources; 1739a1b1b61fSSean Hefty event->param.conn.initiator_depth = rep_data->initiator_depth; 1740a1b1b61fSSean Hefty event->param.conn.flow_control = rep_data->flow_control; 1741a1b1b61fSSean Hefty event->param.conn.rnr_retry_count = rep_data->rnr_retry_count; 1742a1b1b61fSSean Hefty event->param.conn.srq = rep_data->srq; 1743a1b1b61fSSean Hefty event->param.conn.qp_num = rep_data->remote_qpn; 1744a1b1b61fSSean Hefty } 1745a1b1b61fSSean Hefty 1746e51060f0SSean Hefty static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1747e51060f0SSean Hefty { 1748e51060f0SSean Hefty struct rdma_id_private *id_priv = cm_id->context; 1749a1b1b61fSSean Hefty struct rdma_cm_event event; 1750a1b1b61fSSean Hefty int ret = 0; 1751e51060f0SSean Hefty 175237e07cdaSBart Van Assche mutex_lock(&id_priv->handler_mutex); 175338ca83a5SAmir Vadai if ((ib_event->event != IB_CM_TIMEWAIT_EXIT && 175437e07cdaSBart Van Assche id_priv->state != RDMA_CM_CONNECT) || 175538ca83a5SAmir Vadai (ib_event->event == IB_CM_TIMEWAIT_EXIT && 175637e07cdaSBart Van Assche id_priv->state != RDMA_CM_DISCONNECT)) 175737e07cdaSBart Van Assche goto out; 1758e51060f0SSean Hefty 1759a1b1b61fSSean Hefty memset(&event, 0, sizeof event); 1760e51060f0SSean Hefty switch (ib_event->event) { 1761e51060f0SSean Hefty case IB_CM_REQ_ERROR: 1762e51060f0SSean Hefty case IB_CM_REP_ERROR: 1763a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_UNREACHABLE; 1764a1b1b61fSSean Hefty event.status = -ETIMEDOUT; 1765e51060f0SSean Hefty break; 1766e51060f0SSean Hefty case IB_CM_REP_RECEIVED: 176761c0ddbeSMoni Shoua if (cma_comp(id_priv, RDMA_CM_CONNECT) && 176861c0ddbeSMoni Shoua (id_priv->id.qp_type != IB_QPT_UD)) 176961c0ddbeSMoni Shoua ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 177001602f11SSean Hefty if (id_priv->id.qp) { 1771a1b1b61fSSean Hefty event.status = cma_rep_recv(id_priv); 1772a1b1b61fSSean Hefty event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR : 1773e51060f0SSean Hefty RDMA_CM_EVENT_ESTABLISHED; 177401602f11SSean Hefty } else { 1775a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_CONNECT_RESPONSE; 177601602f11SSean Hefty } 1777a1b1b61fSSean Hefty cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd, 1778a1b1b61fSSean Hefty ib_event->private_data); 1779e51060f0SSean Hefty break; 1780e51060f0SSean Hefty case IB_CM_RTU_RECEIVED: 17810fe313b0SSean Hefty case IB_CM_USER_ESTABLISHED: 17820fe313b0SSean Hefty event.event = RDMA_CM_EVENT_ESTABLISHED; 1783e51060f0SSean Hefty break; 1784e51060f0SSean Hefty case IB_CM_DREQ_ERROR: 1785a1b1b61fSSean Hefty event.status = -ETIMEDOUT; /* fall through */ 1786e51060f0SSean Hefty case IB_CM_DREQ_RECEIVED: 1787e51060f0SSean Hefty case IB_CM_DREP_RECEIVED: 1788550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT, 1789550e5ca7SNir Muchtar RDMA_CM_DISCONNECT)) 1790e51060f0SSean Hefty goto out; 1791a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_DISCONNECTED; 1792e51060f0SSean Hefty break; 1793e51060f0SSean Hefty case IB_CM_TIMEWAIT_EXIT: 179438ca83a5SAmir Vadai event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT; 179538ca83a5SAmir Vadai break; 1796e51060f0SSean Hefty case IB_CM_MRA_RECEIVED: 1797e51060f0SSean Hefty /* ignore event */ 1798e51060f0SSean Hefty goto out; 1799e51060f0SSean Hefty case IB_CM_REJ_RECEIVED: 1800498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id, 1801498683c6SMoni Shoua ib_event->param.rej_rcvd.reason)); 1802c5483388SSean Hefty cma_modify_qp_err(id_priv); 1803a1b1b61fSSean Hefty event.status = ib_event->param.rej_rcvd.reason; 1804a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_REJECTED; 1805a1b1b61fSSean Hefty event.param.conn.private_data = ib_event->private_data; 1806a1b1b61fSSean Hefty event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE; 1807e51060f0SSean Hefty break; 1808e51060f0SSean Hefty default: 1809aba25a3eSParav Pandit pr_err("RDMA CMA: unexpected IB CM event: %d\n", 1810e51060f0SSean Hefty ib_event->event); 1811e51060f0SSean Hefty goto out; 1812e51060f0SSean Hefty } 1813e51060f0SSean Hefty 1814a1b1b61fSSean Hefty ret = id_priv->id.event_handler(&id_priv->id, &event); 1815e51060f0SSean Hefty if (ret) { 1816e51060f0SSean Hefty /* Destroy the CM ID by returning a non-zero value. */ 1817e51060f0SSean Hefty id_priv->cm_id.ib = NULL; 1818550e5ca7SNir Muchtar cma_exch(id_priv, RDMA_CM_DESTROYING); 1819de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 1820e51060f0SSean Hefty rdma_destroy_id(&id_priv->id); 1821e51060f0SSean Hefty return ret; 1822e51060f0SSean Hefty } 1823e51060f0SSean Hefty out: 1824de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 1825e51060f0SSean Hefty return ret; 1826e51060f0SSean Hefty } 1827e51060f0SSean Hefty 1828628e5f6dSSean Hefty static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 18290b3ca768SHaggai Eran struct ib_cm_event *ib_event, 18300b3ca768SHaggai Eran struct net_device *net_dev) 1831e51060f0SSean Hefty { 183200313983SSteve Wise struct rdma_id_private *listen_id_priv; 1833e51060f0SSean Hefty struct rdma_id_private *id_priv; 1834e51060f0SSean Hefty struct rdma_cm_id *id; 1835e51060f0SSean Hefty struct rdma_route *rt; 18360c505f70SHaggai Eran const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 18379fdca4daSDasaratharaman Chandramouli struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path; 1838d3957b86SMajd Dibbiny const __be64 service_id = 1839d3957b86SMajd Dibbiny ib_event->param.req_rcvd.primary_path->service_id; 184064c5e613SOr Gerlitz int ret; 1841e51060f0SSean Hefty 184200313983SSteve Wise listen_id_priv = container_of(listen_id, struct rdma_id_private, id); 184300313983SSteve Wise id = __rdma_create_id(listen_id->route.addr.dev_addr.net, 1844fa20105eSGuy Shapiro listen_id->event_handler, listen_id->context, 184500313983SSteve Wise listen_id->ps, ib_event->param.req_rcvd.qp_type, 184600313983SSteve Wise listen_id_priv->res.kern_name); 18473f168d2bSKrishna Kumar if (IS_ERR(id)) 18480c9361fcSJack Morgenstein return NULL; 18493f168d2bSKrishna Kumar 1850f4753834SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 18510c505f70SHaggai Eran if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 18520c505f70SHaggai Eran (struct sockaddr *)&id->route.addr.dst_addr, 18530c505f70SHaggai Eran listen_id, ib_event, ss_family, service_id)) 1854fbaa1a6dSSean Hefty goto err; 18553f168d2bSKrishna Kumar 18563f168d2bSKrishna Kumar rt = &id->route; 18573f168d2bSKrishna Kumar rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1; 1858*6da2ec56SKees Cook rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec), 18593f168d2bSKrishna Kumar GFP_KERNEL); 18603f168d2bSKrishna Kumar if (!rt->path_rec) 18610c9361fcSJack Morgenstein goto err; 18623f168d2bSKrishna Kumar 18639fdca4daSDasaratharaman Chandramouli rt->path_rec[0] = *path; 1864e51060f0SSean Hefty if (rt->num_paths == 2) 1865e51060f0SSean Hefty rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; 1866e51060f0SSean Hefty 18670b3ca768SHaggai Eran if (net_dev) { 1868e08ce2e8SYuval Shaia rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL); 18690b3ca768SHaggai Eran } else { 1870b8cab5daSHaggai Eran if (!cma_protocol_roce(listen_id) && 1871b8cab5daSHaggai Eran cma_any_addr(cma_src_addr(id_priv))) { 1872b8cab5daSHaggai Eran rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; 1873b8cab5daSHaggai Eran rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); 1874b8cab5daSHaggai Eran ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); 1875b8cab5daSHaggai Eran } else if (!cma_any_addr(cma_src_addr(id_priv))) { 1876b8cab5daSHaggai Eran ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); 1877b8cab5daSHaggai Eran if (ret) 1878b8cab5daSHaggai Eran goto err; 1879b8cab5daSHaggai Eran } 18806f8372b6SSean Hefty } 18816f8372b6SSean Hefty rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); 1882e51060f0SSean Hefty 1883550e5ca7SNir Muchtar id_priv->state = RDMA_CM_CONNECT; 1884e51060f0SSean Hefty return id_priv; 18853f168d2bSKrishna Kumar 18863f168d2bSKrishna Kumar err: 18870c9361fcSJack Morgenstein rdma_destroy_id(id); 1888e51060f0SSean Hefty return NULL; 1889e51060f0SSean Hefty } 1890e51060f0SSean Hefty 1891628e5f6dSSean Hefty static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 18920b3ca768SHaggai Eran struct ib_cm_event *ib_event, 18930b3ca768SHaggai Eran struct net_device *net_dev) 1894628e5f6dSSean Hefty { 189500313983SSteve Wise struct rdma_id_private *listen_id_priv; 1896628e5f6dSSean Hefty struct rdma_id_private *id_priv; 1897628e5f6dSSean Hefty struct rdma_cm_id *id; 18980c505f70SHaggai Eran const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family; 1899fa20105eSGuy Shapiro struct net *net = listen_id->route.addr.dev_addr.net; 1900628e5f6dSSean Hefty int ret; 1901628e5f6dSSean Hefty 190200313983SSteve Wise listen_id_priv = container_of(listen_id, struct rdma_id_private, id); 190300313983SSteve Wise id = __rdma_create_id(net, listen_id->event_handler, listen_id->context, 190400313983SSteve Wise listen_id->ps, IB_QPT_UD, 190500313983SSteve Wise listen_id_priv->res.kern_name); 1906628e5f6dSSean Hefty if (IS_ERR(id)) 1907628e5f6dSSean Hefty return NULL; 1908628e5f6dSSean Hefty 1909f4753834SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 19100c505f70SHaggai Eran if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr, 19110c505f70SHaggai Eran (struct sockaddr *)&id->route.addr.dst_addr, 19120c505f70SHaggai Eran listen_id, ib_event, ss_family, 19130c505f70SHaggai Eran ib_event->param.sidr_req_rcvd.service_id)) 1914628e5f6dSSean Hefty goto err; 1915628e5f6dSSean Hefty 19160b3ca768SHaggai Eran if (net_dev) { 1917e08ce2e8SYuval Shaia rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL); 19180b3ca768SHaggai Eran } else { 1919b8cab5daSHaggai Eran if (!cma_any_addr(cma_src_addr(id_priv))) { 1920b8cab5daSHaggai Eran ret = cma_translate_addr(cma_src_addr(id_priv), 19210b3ca768SHaggai Eran &id->route.addr.dev_addr); 1922b8cab5daSHaggai Eran if (ret) 1923b8cab5daSHaggai Eran goto err; 1924b8cab5daSHaggai Eran } 19256f8372b6SSean Hefty } 1926628e5f6dSSean Hefty 1927550e5ca7SNir Muchtar id_priv->state = RDMA_CM_CONNECT; 1928628e5f6dSSean Hefty return id_priv; 1929628e5f6dSSean Hefty err: 1930628e5f6dSSean Hefty rdma_destroy_id(id); 1931628e5f6dSSean Hefty return NULL; 1932628e5f6dSSean Hefty } 1933628e5f6dSSean Hefty 1934a1b1b61fSSean Hefty static void cma_set_req_event_data(struct rdma_cm_event *event, 1935a1b1b61fSSean Hefty struct ib_cm_req_event_param *req_data, 1936a1b1b61fSSean Hefty void *private_data, int offset) 1937a1b1b61fSSean Hefty { 1938a1b1b61fSSean Hefty event->param.conn.private_data = private_data + offset; 1939a1b1b61fSSean Hefty event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset; 1940a1b1b61fSSean Hefty event->param.conn.responder_resources = req_data->responder_resources; 1941a1b1b61fSSean Hefty event->param.conn.initiator_depth = req_data->initiator_depth; 1942a1b1b61fSSean Hefty event->param.conn.flow_control = req_data->flow_control; 1943a1b1b61fSSean Hefty event->param.conn.retry_count = req_data->retry_count; 1944a1b1b61fSSean Hefty event->param.conn.rnr_retry_count = req_data->rnr_retry_count; 1945a1b1b61fSSean Hefty event->param.conn.srq = req_data->srq; 1946a1b1b61fSSean Hefty event->param.conn.qp_num = req_data->remote_qpn; 1947a1b1b61fSSean Hefty } 1948a1b1b61fSSean Hefty 19499595480cSHefty, Sean static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event) 19509595480cSHefty, Sean { 19514dd81e89SSean Hefty return (((ib_event->event == IB_CM_REQ_RECEIVED) && 19529595480cSHefty, Sean (ib_event->param.req_rcvd.qp_type == id->qp_type)) || 19539595480cSHefty, Sean ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) && 19549595480cSHefty, Sean (id->qp_type == IB_QPT_UD)) || 19559595480cSHefty, Sean (!id->qp_type)); 19569595480cSHefty, Sean } 19579595480cSHefty, Sean 1958e51060f0SSean Hefty static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) 1959e51060f0SSean Hefty { 196037e07cdaSBart Van Assche struct rdma_id_private *listen_id, *conn_id = NULL; 1961a1b1b61fSSean Hefty struct rdma_cm_event event; 19620b3ca768SHaggai Eran struct net_device *net_dev; 1963c0b64f58SBart Van Assche u8 offset; 1964c0b64f58SBart Van Assche int ret; 1965e51060f0SSean Hefty 19660b3ca768SHaggai Eran listen_id = cma_id_from_event(cm_id, ib_event, &net_dev); 19674c21b5bcSHaggai Eran if (IS_ERR(listen_id)) 19684c21b5bcSHaggai Eran return PTR_ERR(listen_id); 19694c21b5bcSHaggai Eran 19700b3ca768SHaggai Eran if (!cma_check_req_qp_type(&listen_id->id, ib_event)) { 19710b3ca768SHaggai Eran ret = -EINVAL; 19720b3ca768SHaggai Eran goto net_dev_put; 19730b3ca768SHaggai Eran } 19749595480cSHefty, Sean 197537e07cdaSBart Van Assche mutex_lock(&listen_id->handler_mutex); 197637e07cdaSBart Van Assche if (listen_id->state != RDMA_CM_LISTEN) { 19770b3ca768SHaggai Eran ret = -ECONNABORTED; 197837e07cdaSBart Van Assche goto err1; 19790b3ca768SHaggai Eran } 1980e51060f0SSean Hefty 1981628e5f6dSSean Hefty memset(&event, 0, sizeof event); 1982e8160e15SSean Hefty offset = cma_user_data_offset(listen_id); 1983628e5f6dSSean Hefty event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 19849595480cSHefty, Sean if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { 19850b3ca768SHaggai Eran conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev); 1986628e5f6dSSean Hefty event.param.ud.private_data = ib_event->private_data + offset; 1987628e5f6dSSean Hefty event.param.ud.private_data_len = 1988628e5f6dSSean Hefty IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; 1989628e5f6dSSean Hefty } else { 19900b3ca768SHaggai Eran conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev); 1991628e5f6dSSean Hefty cma_set_req_event_data(&event, &ib_event->param.req_rcvd, 1992628e5f6dSSean Hefty ib_event->private_data, offset); 1993628e5f6dSSean Hefty } 1994e51060f0SSean Hefty if (!conn_id) { 1995e51060f0SSean Hefty ret = -ENOMEM; 1996b6cec8aaSSean Hefty goto err1; 1997e51060f0SSean Hefty } 1998e51060f0SSean Hefty 1999de910bd9SOr Gerlitz mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 2000be9130ccSDoug Ledford ret = cma_acquire_dev(conn_id, listen_id); 2001a1a733f6SKrishna Kumar if (ret) 2002b6cec8aaSSean Hefty goto err2; 2003e51060f0SSean Hefty 2004e51060f0SSean Hefty conn_id->cm_id.ib = cm_id; 2005e51060f0SSean Hefty cm_id->context = conn_id; 2006e51060f0SSean Hefty cm_id->cm_handler = cma_ib_handler; 2007e51060f0SSean Hefty 200825ae21a1SSean Hefty /* 200925ae21a1SSean Hefty * Protect against the user destroying conn_id from another thread 201025ae21a1SSean Hefty * until we're done accessing it. 201125ae21a1SSean Hefty */ 201225ae21a1SSean Hefty atomic_inc(&conn_id->refcount); 2013a1b1b61fSSean Hefty ret = conn_id->id.event_handler(&conn_id->id, &event); 2014b6cec8aaSSean Hefty if (ret) 2015b6cec8aaSSean Hefty goto err3; 2016ead595aeSSean Hefty /* 2017ead595aeSSean Hefty * Acquire mutex to prevent user executing rdma_destroy_id() 2018ead595aeSSean Hefty * while we're accessing the cm_id. 2019ead595aeSSean Hefty */ 2020ead595aeSSean Hefty mutex_lock(&lock); 2021dd5f03beSMatan Barak if (cma_comp(conn_id, RDMA_CM_CONNECT) && 2022dd5f03beSMatan Barak (conn_id->id.qp_type != IB_QPT_UD)) 2023ead595aeSSean Hefty ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0); 2024ead595aeSSean Hefty mutex_unlock(&lock); 2025de910bd9SOr Gerlitz mutex_unlock(&conn_id->handler_mutex); 2026b6cec8aaSSean Hefty mutex_unlock(&listen_id->handler_mutex); 202725ae21a1SSean Hefty cma_deref_id(conn_id); 20280b3ca768SHaggai Eran if (net_dev) 20290b3ca768SHaggai Eran dev_put(net_dev); 2030b6cec8aaSSean Hefty return 0; 2031a1a733f6SKrishna Kumar 2032b6cec8aaSSean Hefty err3: 2033b6cec8aaSSean Hefty cma_deref_id(conn_id); 2034e51060f0SSean Hefty /* Destroy the CM ID by returning a non-zero value. */ 2035e51060f0SSean Hefty conn_id->cm_id.ib = NULL; 2036b6cec8aaSSean Hefty err2: 2037550e5ca7SNir Muchtar cma_exch(conn_id, RDMA_CM_DESTROYING); 2038de910bd9SOr Gerlitz mutex_unlock(&conn_id->handler_mutex); 2039b6cec8aaSSean Hefty err1: 2040de910bd9SOr Gerlitz mutex_unlock(&listen_id->handler_mutex); 2041b6cec8aaSSean Hefty if (conn_id) 2042b6cec8aaSSean Hefty rdma_destroy_id(&conn_id->id); 20430b3ca768SHaggai Eran 20440b3ca768SHaggai Eran net_dev_put: 20450b3ca768SHaggai Eran if (net_dev) 20460b3ca768SHaggai Eran dev_put(net_dev); 20470b3ca768SHaggai Eran 2048e51060f0SSean Hefty return ret; 2049e51060f0SSean Hefty } 2050e51060f0SSean Hefty 2051cf53936fSSean Hefty __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr) 2052e51060f0SSean Hefty { 2053496ce3ceSSean Hefty if (addr->sa_family == AF_IB) 2054496ce3ceSSean Hefty return ((struct sockaddr_ib *) addr)->sib_sid; 2055496ce3ceSSean Hefty 2056cf53936fSSean Hefty return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr))); 2057e51060f0SSean Hefty } 2058cf53936fSSean Hefty EXPORT_SYMBOL(rdma_get_service_id); 2059e51060f0SSean Hefty 2060411460acSParav Pandit void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid, 2061411460acSParav Pandit union ib_gid *dgid) 2062411460acSParav Pandit { 2063411460acSParav Pandit struct rdma_addr *addr = &cm_id->route.addr; 2064411460acSParav Pandit 2065411460acSParav Pandit if (!cm_id->device) { 2066411460acSParav Pandit if (sgid) 2067411460acSParav Pandit memset(sgid, 0, sizeof(*sgid)); 2068411460acSParav Pandit if (dgid) 2069411460acSParav Pandit memset(dgid, 0, sizeof(*dgid)); 2070411460acSParav Pandit return; 2071411460acSParav Pandit } 2072411460acSParav Pandit 2073411460acSParav Pandit if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) { 2074411460acSParav Pandit if (sgid) 2075411460acSParav Pandit rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid); 2076411460acSParav Pandit if (dgid) 2077411460acSParav Pandit rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid); 2078411460acSParav Pandit } else { 2079411460acSParav Pandit if (sgid) 2080411460acSParav Pandit rdma_addr_get_sgid(&addr->dev_addr, sgid); 2081411460acSParav Pandit if (dgid) 2082411460acSParav Pandit rdma_addr_get_dgid(&addr->dev_addr, dgid); 2083411460acSParav Pandit } 2084411460acSParav Pandit } 2085411460acSParav Pandit EXPORT_SYMBOL(rdma_read_gids); 2086411460acSParav Pandit 208707ebafbaSTom Tucker static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event) 208807ebafbaSTom Tucker { 208907ebafbaSTom Tucker struct rdma_id_private *id_priv = iw_id->context; 2090a1b1b61fSSean Hefty struct rdma_cm_event event; 209107ebafbaSTom Tucker int ret = 0; 209224d44a39SSteve Wise struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 209324d44a39SSteve Wise struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 209407ebafbaSTom Tucker 209537e07cdaSBart Van Assche mutex_lock(&id_priv->handler_mutex); 209637e07cdaSBart Van Assche if (id_priv->state != RDMA_CM_CONNECT) 209737e07cdaSBart Van Assche goto out; 209807ebafbaSTom Tucker 2099be65f086SSean Hefty memset(&event, 0, sizeof event); 210007ebafbaSTom Tucker switch (iw_event->event) { 210107ebafbaSTom Tucker case IW_CM_EVENT_CLOSE: 2102a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_DISCONNECTED; 210307ebafbaSTom Tucker break; 210407ebafbaSTom Tucker case IW_CM_EVENT_CONNECT_REPLY: 210524d44a39SSteve Wise memcpy(cma_src_addr(id_priv), laddr, 210624d44a39SSteve Wise rdma_addr_size(laddr)); 210724d44a39SSteve Wise memcpy(cma_dst_addr(id_priv), raddr, 210824d44a39SSteve Wise rdma_addr_size(raddr)); 2109881a045fSSteve Wise switch (iw_event->status) { 2110881a045fSSteve Wise case 0: 2111a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_ESTABLISHED; 21123ebeebc3SKumar Sanghvi event.param.conn.initiator_depth = iw_event->ird; 21133ebeebc3SKumar Sanghvi event.param.conn.responder_resources = iw_event->ord; 211407ebafbaSTom Tucker break; 2115881a045fSSteve Wise case -ECONNRESET: 2116881a045fSSteve Wise case -ECONNREFUSED: 2117881a045fSSteve Wise event.event = RDMA_CM_EVENT_REJECTED; 2118881a045fSSteve Wise break; 2119881a045fSSteve Wise case -ETIMEDOUT: 2120881a045fSSteve Wise event.event = RDMA_CM_EVENT_UNREACHABLE; 2121881a045fSSteve Wise break; 2122881a045fSSteve Wise default: 2123881a045fSSteve Wise event.event = RDMA_CM_EVENT_CONNECT_ERROR; 2124881a045fSSteve Wise break; 2125881a045fSSteve Wise } 2126881a045fSSteve Wise break; 212707ebafbaSTom Tucker case IW_CM_EVENT_ESTABLISHED: 2128a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_ESTABLISHED; 21293ebeebc3SKumar Sanghvi event.param.conn.initiator_depth = iw_event->ird; 21303ebeebc3SKumar Sanghvi event.param.conn.responder_resources = iw_event->ord; 213107ebafbaSTom Tucker break; 213207ebafbaSTom Tucker default: 2133671a6cc2SLeon Romanovsky goto out; 213407ebafbaSTom Tucker } 213507ebafbaSTom Tucker 2136a1b1b61fSSean Hefty event.status = iw_event->status; 2137a1b1b61fSSean Hefty event.param.conn.private_data = iw_event->private_data; 2138a1b1b61fSSean Hefty event.param.conn.private_data_len = iw_event->private_data_len; 2139a1b1b61fSSean Hefty ret = id_priv->id.event_handler(&id_priv->id, &event); 214007ebafbaSTom Tucker if (ret) { 214107ebafbaSTom Tucker /* Destroy the CM ID by returning a non-zero value. */ 214207ebafbaSTom Tucker id_priv->cm_id.iw = NULL; 2143550e5ca7SNir Muchtar cma_exch(id_priv, RDMA_CM_DESTROYING); 2144de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 214507ebafbaSTom Tucker rdma_destroy_id(&id_priv->id); 214607ebafbaSTom Tucker return ret; 214707ebafbaSTom Tucker } 214807ebafbaSTom Tucker 214937e07cdaSBart Van Assche out: 2150de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 215107ebafbaSTom Tucker return ret; 215207ebafbaSTom Tucker } 215307ebafbaSTom Tucker 215407ebafbaSTom Tucker static int iw_conn_req_handler(struct iw_cm_id *cm_id, 215507ebafbaSTom Tucker struct iw_cm_event *iw_event) 215607ebafbaSTom Tucker { 215707ebafbaSTom Tucker struct rdma_cm_id *new_cm_id; 215807ebafbaSTom Tucker struct rdma_id_private *listen_id, *conn_id; 2159a1b1b61fSSean Hefty struct rdma_cm_event event; 216037e07cdaSBart Van Assche int ret = -ECONNABORTED; 216124d44a39SSteve Wise struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr; 216224d44a39SSteve Wise struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr; 216307ebafbaSTom Tucker 216407ebafbaSTom Tucker listen_id = cm_id->context; 216537e07cdaSBart Van Assche 216637e07cdaSBart Van Assche mutex_lock(&listen_id->handler_mutex); 216737e07cdaSBart Van Assche if (listen_id->state != RDMA_CM_LISTEN) 216837e07cdaSBart Van Assche goto out; 216907ebafbaSTom Tucker 217007ebafbaSTom Tucker /* Create a new RDMA id for the new IW CM ID */ 217100313983SSteve Wise new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net, 2172fa20105eSGuy Shapiro listen_id->id.event_handler, 217307ebafbaSTom Tucker listen_id->id.context, 217400313983SSteve Wise RDMA_PS_TCP, IB_QPT_RC, 217500313983SSteve Wise listen_id->res.kern_name); 217610f32065SJulia Lawall if (IS_ERR(new_cm_id)) { 217707ebafbaSTom Tucker ret = -ENOMEM; 217807ebafbaSTom Tucker goto out; 217907ebafbaSTom Tucker } 218007ebafbaSTom Tucker conn_id = container_of(new_cm_id, struct rdma_id_private, id); 2181de910bd9SOr Gerlitz mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); 2182550e5ca7SNir Muchtar conn_id->state = RDMA_CM_CONNECT; 218307ebafbaSTom Tucker 2184575c7e58SParav Pandit ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr); 218507ebafbaSTom Tucker if (ret) { 2186de910bd9SOr Gerlitz mutex_unlock(&conn_id->handler_mutex); 218707ebafbaSTom Tucker rdma_destroy_id(new_cm_id); 218807ebafbaSTom Tucker goto out; 218907ebafbaSTom Tucker } 219007ebafbaSTom Tucker 2191be9130ccSDoug Ledford ret = cma_acquire_dev(conn_id, listen_id); 219207ebafbaSTom Tucker if (ret) { 2193de910bd9SOr Gerlitz mutex_unlock(&conn_id->handler_mutex); 219407ebafbaSTom Tucker rdma_destroy_id(new_cm_id); 219507ebafbaSTom Tucker goto out; 219607ebafbaSTom Tucker } 219707ebafbaSTom Tucker 219807ebafbaSTom Tucker conn_id->cm_id.iw = cm_id; 219907ebafbaSTom Tucker cm_id->context = conn_id; 220007ebafbaSTom Tucker cm_id->cm_handler = cma_iw_handler; 220107ebafbaSTom Tucker 220224d44a39SSteve Wise memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr)); 220324d44a39SSteve Wise memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr)); 220407ebafbaSTom Tucker 2205a1b1b61fSSean Hefty memset(&event, 0, sizeof event); 2206a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_CONNECT_REQUEST; 2207a1b1b61fSSean Hefty event.param.conn.private_data = iw_event->private_data; 2208a1b1b61fSSean Hefty event.param.conn.private_data_len = iw_event->private_data_len; 22093ebeebc3SKumar Sanghvi event.param.conn.initiator_depth = iw_event->ird; 22103ebeebc3SKumar Sanghvi event.param.conn.responder_resources = iw_event->ord; 221125ae21a1SSean Hefty 221225ae21a1SSean Hefty /* 221325ae21a1SSean Hefty * Protect against the user destroying conn_id from another thread 221425ae21a1SSean Hefty * until we're done accessing it. 221525ae21a1SSean Hefty */ 221625ae21a1SSean Hefty atomic_inc(&conn_id->refcount); 2217a1b1b61fSSean Hefty ret = conn_id->id.event_handler(&conn_id->id, &event); 221807ebafbaSTom Tucker if (ret) { 221907ebafbaSTom Tucker /* User wants to destroy the CM ID */ 222007ebafbaSTom Tucker conn_id->cm_id.iw = NULL; 2221550e5ca7SNir Muchtar cma_exch(conn_id, RDMA_CM_DESTROYING); 2222de910bd9SOr Gerlitz mutex_unlock(&conn_id->handler_mutex); 222325ae21a1SSean Hefty cma_deref_id(conn_id); 222407ebafbaSTom Tucker rdma_destroy_id(&conn_id->id); 2225de910bd9SOr Gerlitz goto out; 222607ebafbaSTom Tucker } 222707ebafbaSTom Tucker 2228de910bd9SOr Gerlitz mutex_unlock(&conn_id->handler_mutex); 222925ae21a1SSean Hefty cma_deref_id(conn_id); 2230de910bd9SOr Gerlitz 223107ebafbaSTom Tucker out: 2232de910bd9SOr Gerlitz mutex_unlock(&listen_id->handler_mutex); 223307ebafbaSTom Tucker return ret; 223407ebafbaSTom Tucker } 223507ebafbaSTom Tucker 2236e51060f0SSean Hefty static int cma_ib_listen(struct rdma_id_private *id_priv) 2237e51060f0SSean Hefty { 2238e51060f0SSean Hefty struct sockaddr *addr; 22390c9361fcSJack Morgenstein struct ib_cm_id *id; 2240e51060f0SSean Hefty __be64 svc_id; 2241e51060f0SSean Hefty 2242f4753834SSean Hefty addr = cma_src_addr(id_priv); 2243cf53936fSSean Hefty svc_id = rdma_get_service_id(&id_priv->id, addr); 224451efe394SHaggai Eran id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id); 224551efe394SHaggai Eran if (IS_ERR(id)) 224651efe394SHaggai Eran return PTR_ERR(id); 224751efe394SHaggai Eran id_priv->cm_id.ib = id; 2248e51060f0SSean Hefty 224951efe394SHaggai Eran return 0; 2250e51060f0SSean Hefty } 2251e51060f0SSean Hefty 225207ebafbaSTom Tucker static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog) 225307ebafbaSTom Tucker { 225407ebafbaSTom Tucker int ret; 22550c9361fcSJack Morgenstein struct iw_cm_id *id; 225607ebafbaSTom Tucker 22570c9361fcSJack Morgenstein id = iw_create_cm_id(id_priv->id.device, 225807ebafbaSTom Tucker iw_conn_req_handler, 225907ebafbaSTom Tucker id_priv); 22600c9361fcSJack Morgenstein if (IS_ERR(id)) 22610c9361fcSJack Morgenstein return PTR_ERR(id); 22620c9361fcSJack Morgenstein 226368cdba06SSteve Wise id->tos = id_priv->tos; 22640c9361fcSJack Morgenstein id_priv->cm_id.iw = id; 226507ebafbaSTom Tucker 226624d44a39SSteve Wise memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv), 226724d44a39SSteve Wise rdma_addr_size(cma_src_addr(id_priv))); 226807ebafbaSTom Tucker 226907ebafbaSTom Tucker ret = iw_cm_listen(id_priv->cm_id.iw, backlog); 227007ebafbaSTom Tucker 227107ebafbaSTom Tucker if (ret) { 227207ebafbaSTom Tucker iw_destroy_cm_id(id_priv->cm_id.iw); 227307ebafbaSTom Tucker id_priv->cm_id.iw = NULL; 227407ebafbaSTom Tucker } 227507ebafbaSTom Tucker 227607ebafbaSTom Tucker return ret; 227707ebafbaSTom Tucker } 227807ebafbaSTom Tucker 2279e51060f0SSean Hefty static int cma_listen_handler(struct rdma_cm_id *id, 2280e51060f0SSean Hefty struct rdma_cm_event *event) 2281e51060f0SSean Hefty { 2282e51060f0SSean Hefty struct rdma_id_private *id_priv = id->context; 2283e51060f0SSean Hefty 2284e51060f0SSean Hefty id->context = id_priv->id.context; 2285e51060f0SSean Hefty id->event_handler = id_priv->id.event_handler; 2286e51060f0SSean Hefty return id_priv->id.event_handler(id, event); 2287e51060f0SSean Hefty } 2288e51060f0SSean Hefty 2289e51060f0SSean Hefty static void cma_listen_on_dev(struct rdma_id_private *id_priv, 2290e51060f0SSean Hefty struct cma_device *cma_dev) 2291e51060f0SSean Hefty { 2292e51060f0SSean Hefty struct rdma_id_private *dev_id_priv; 2293e51060f0SSean Hefty struct rdma_cm_id *id; 2294fa20105eSGuy Shapiro struct net *net = id_priv->id.route.addr.dev_addr.net; 2295e51060f0SSean Hefty int ret; 2296e51060f0SSean Hefty 229772219ceaSMichael Wang if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1)) 229894d0c939SSean Hefty return; 229994d0c939SSean Hefty 230000313983SSteve Wise id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps, 230100313983SSteve Wise id_priv->id.qp_type, id_priv->res.kern_name); 2302e51060f0SSean Hefty if (IS_ERR(id)) 2303e51060f0SSean Hefty return; 2304e51060f0SSean Hefty 2305e51060f0SSean Hefty dev_id_priv = container_of(id, struct rdma_id_private, id); 2306e51060f0SSean Hefty 2307550e5ca7SNir Muchtar dev_id_priv->state = RDMA_CM_ADDR_BOUND; 2308f4753834SSean Hefty memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv), 2309f4753834SSean Hefty rdma_addr_size(cma_src_addr(id_priv))); 2310e51060f0SSean Hefty 2311045959dbSMatan Barak _cma_attach_to_dev(dev_id_priv, cma_dev); 2312e51060f0SSean Hefty list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); 2313d02d1f53SSean Hefty atomic_inc(&id_priv->refcount); 2314d02d1f53SSean Hefty dev_id_priv->internal_id = 1; 23155b0ec991SSean Hefty dev_id_priv->afonly = id_priv->afonly; 2316e51060f0SSean Hefty 2317e51060f0SSean Hefty ret = rdma_listen(id, id_priv->backlog); 2318e51060f0SSean Hefty if (ret) 2319aba25a3eSParav Pandit pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n", 2320aba25a3eSParav Pandit ret, cma_dev->device->name); 2321e51060f0SSean Hefty } 2322e51060f0SSean Hefty 2323e51060f0SSean Hefty static void cma_listen_on_all(struct rdma_id_private *id_priv) 2324e51060f0SSean Hefty { 2325e51060f0SSean Hefty struct cma_device *cma_dev; 2326e51060f0SSean Hefty 2327e51060f0SSean Hefty mutex_lock(&lock); 2328e51060f0SSean Hefty list_add_tail(&id_priv->list, &listen_any_list); 2329e51060f0SSean Hefty list_for_each_entry(cma_dev, &dev_list, list) 2330e51060f0SSean Hefty cma_listen_on_dev(id_priv, cma_dev); 2331e51060f0SSean Hefty mutex_unlock(&lock); 2332e51060f0SSean Hefty } 2333e51060f0SSean Hefty 2334a81c994dSSean Hefty void rdma_set_service_type(struct rdma_cm_id *id, int tos) 2335a81c994dSSean Hefty { 2336a81c994dSSean Hefty struct rdma_id_private *id_priv; 2337a81c994dSSean Hefty 2338a81c994dSSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 2339a81c994dSSean Hefty id_priv->tos = (u8) tos; 234089052d78SMajd Dibbiny id_priv->tos_set = true; 2341a81c994dSSean Hefty } 2342a81c994dSSean Hefty EXPORT_SYMBOL(rdma_set_service_type); 2343a81c994dSSean Hefty 2344c2f8fc4eSDasaratharaman Chandramouli static void cma_query_handler(int status, struct sa_path_rec *path_rec, 2345e51060f0SSean Hefty void *context) 2346e51060f0SSean Hefty { 2347e51060f0SSean Hefty struct cma_work *work = context; 2348e51060f0SSean Hefty struct rdma_route *route; 2349e51060f0SSean Hefty 2350e51060f0SSean Hefty route = &work->id->id.route; 2351e51060f0SSean Hefty 2352e51060f0SSean Hefty if (!status) { 2353e51060f0SSean Hefty route->num_paths = 1; 2354e51060f0SSean Hefty *route->path_rec = *path_rec; 2355e51060f0SSean Hefty } else { 2356550e5ca7SNir Muchtar work->old_state = RDMA_CM_ROUTE_QUERY; 2357550e5ca7SNir Muchtar work->new_state = RDMA_CM_ADDR_RESOLVED; 2358e51060f0SSean Hefty work->event.event = RDMA_CM_EVENT_ROUTE_ERROR; 23598f0472d3SSean Hefty work->event.status = status; 2360498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n", 2361498683c6SMoni Shoua status); 2362e51060f0SSean Hefty } 2363e51060f0SSean Hefty 2364e51060f0SSean Hefty queue_work(cma_wq, &work->work); 2365e51060f0SSean Hefty } 2366e51060f0SSean Hefty 2367e51060f0SSean Hefty static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 2368e51060f0SSean Hefty struct cma_work *work) 2369e51060f0SSean Hefty { 2370f4753834SSean Hefty struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 2371c2f8fc4eSDasaratharaman Chandramouli struct sa_path_rec path_rec; 2372a81c994dSSean Hefty ib_sa_comp_mask comp_mask; 2373a81c994dSSean Hefty struct sockaddr_in6 *sin6; 2374f68194caSSean Hefty struct sockaddr_ib *sib; 2375e51060f0SSean Hefty 2376e51060f0SSean Hefty memset(&path_rec, 0, sizeof path_rec); 23774c33bd19SDasaratharaman Chandramouli 23784c33bd19SDasaratharaman Chandramouli if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num)) 23794c33bd19SDasaratharaman Chandramouli path_rec.rec_type = SA_PATH_REC_TYPE_OPA; 23804c33bd19SDasaratharaman Chandramouli else 23819fdca4daSDasaratharaman Chandramouli path_rec.rec_type = SA_PATH_REC_TYPE_IB; 2382f4753834SSean Hefty rdma_addr_get_sgid(dev_addr, &path_rec.sgid); 2383f4753834SSean Hefty rdma_addr_get_dgid(dev_addr, &path_rec.dgid); 2384f4753834SSean Hefty path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 2385e51060f0SSean Hefty path_rec.numb_path = 1; 2386962063e6SSean Hefty path_rec.reversible = 1; 2387d3957b86SMajd Dibbiny path_rec.service_id = rdma_get_service_id(&id_priv->id, 2388d3957b86SMajd Dibbiny cma_dst_addr(id_priv)); 2389a81c994dSSean Hefty 2390a81c994dSSean Hefty comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID | 2391a81c994dSSean Hefty IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH | 2392a81c994dSSean Hefty IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID; 2393a81c994dSSean Hefty 2394f68194caSSean Hefty switch (cma_family(id_priv)) { 2395f68194caSSean Hefty case AF_INET: 2396a81c994dSSean Hefty path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); 2397a81c994dSSean Hefty comp_mask |= IB_SA_PATH_REC_QOS_CLASS; 2398f68194caSSean Hefty break; 2399f68194caSSean Hefty case AF_INET6: 2400f4753834SSean Hefty sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 2401a81c994dSSean Hefty path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); 2402a81c994dSSean Hefty comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2403f68194caSSean Hefty break; 2404f68194caSSean Hefty case AF_IB: 2405f68194caSSean Hefty sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 2406f68194caSSean Hefty path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20); 2407f68194caSSean Hefty comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; 2408f68194caSSean Hefty break; 2409a81c994dSSean Hefty } 2410e51060f0SSean Hefty 2411c1a0b23bSMichael S. Tsirkin id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device, 2412e51060f0SSean Hefty id_priv->id.port_num, &path_rec, 2413a81c994dSSean Hefty comp_mask, timeout_ms, 2414a81c994dSSean Hefty GFP_KERNEL, cma_query_handler, 2415a81c994dSSean Hefty work, &id_priv->query); 2416e51060f0SSean Hefty 2417e51060f0SSean Hefty return (id_priv->query_id < 0) ? id_priv->query_id : 0; 2418e51060f0SSean Hefty } 2419e51060f0SSean Hefty 2420c4028958SDavid Howells static void cma_work_handler(struct work_struct *_work) 2421e51060f0SSean Hefty { 2422c4028958SDavid Howells struct cma_work *work = container_of(_work, struct cma_work, work); 2423e51060f0SSean Hefty struct rdma_id_private *id_priv = work->id; 2424e51060f0SSean Hefty int destroy = 0; 2425e51060f0SSean Hefty 2426de910bd9SOr Gerlitz mutex_lock(&id_priv->handler_mutex); 2427e51060f0SSean Hefty if (!cma_comp_exch(id_priv, work->old_state, work->new_state)) 2428e51060f0SSean Hefty goto out; 2429e51060f0SSean Hefty 2430e51060f0SSean Hefty if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2431550e5ca7SNir Muchtar cma_exch(id_priv, RDMA_CM_DESTROYING); 2432e51060f0SSean Hefty destroy = 1; 2433e51060f0SSean Hefty } 2434e51060f0SSean Hefty out: 2435de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 2436e51060f0SSean Hefty cma_deref_id(id_priv); 2437e51060f0SSean Hefty if (destroy) 2438e51060f0SSean Hefty rdma_destroy_id(&id_priv->id); 2439e51060f0SSean Hefty kfree(work); 2440e51060f0SSean Hefty } 2441e51060f0SSean Hefty 2442dd5bdff8SOr Gerlitz static void cma_ndev_work_handler(struct work_struct *_work) 2443dd5bdff8SOr Gerlitz { 2444dd5bdff8SOr Gerlitz struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work); 2445dd5bdff8SOr Gerlitz struct rdma_id_private *id_priv = work->id; 2446dd5bdff8SOr Gerlitz int destroy = 0; 2447dd5bdff8SOr Gerlitz 2448dd5bdff8SOr Gerlitz mutex_lock(&id_priv->handler_mutex); 2449550e5ca7SNir Muchtar if (id_priv->state == RDMA_CM_DESTROYING || 2450550e5ca7SNir Muchtar id_priv->state == RDMA_CM_DEVICE_REMOVAL) 2451dd5bdff8SOr Gerlitz goto out; 2452dd5bdff8SOr Gerlitz 2453dd5bdff8SOr Gerlitz if (id_priv->id.event_handler(&id_priv->id, &work->event)) { 2454550e5ca7SNir Muchtar cma_exch(id_priv, RDMA_CM_DESTROYING); 2455dd5bdff8SOr Gerlitz destroy = 1; 2456dd5bdff8SOr Gerlitz } 2457dd5bdff8SOr Gerlitz 2458dd5bdff8SOr Gerlitz out: 2459dd5bdff8SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 2460dd5bdff8SOr Gerlitz cma_deref_id(id_priv); 2461dd5bdff8SOr Gerlitz if (destroy) 2462dd5bdff8SOr Gerlitz rdma_destroy_id(&id_priv->id); 2463dd5bdff8SOr Gerlitz kfree(work); 2464dd5bdff8SOr Gerlitz } 2465dd5bdff8SOr Gerlitz 2466981b5a23SParav Pandit static void cma_init_resolve_route_work(struct cma_work *work, 2467981b5a23SParav Pandit struct rdma_id_private *id_priv) 2468981b5a23SParav Pandit { 2469981b5a23SParav Pandit work->id = id_priv; 2470981b5a23SParav Pandit INIT_WORK(&work->work, cma_work_handler); 2471981b5a23SParav Pandit work->old_state = RDMA_CM_ROUTE_QUERY; 2472981b5a23SParav Pandit work->new_state = RDMA_CM_ROUTE_RESOLVED; 2473981b5a23SParav Pandit work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED; 2474981b5a23SParav Pandit } 2475981b5a23SParav Pandit 2476981b5a23SParav Pandit static void cma_init_resolve_addr_work(struct cma_work *work, 2477981b5a23SParav Pandit struct rdma_id_private *id_priv) 2478981b5a23SParav Pandit { 2479981b5a23SParav Pandit work->id = id_priv; 2480981b5a23SParav Pandit INIT_WORK(&work->work, cma_work_handler); 2481981b5a23SParav Pandit work->old_state = RDMA_CM_ADDR_QUERY; 2482981b5a23SParav Pandit work->new_state = RDMA_CM_ADDR_RESOLVED; 2483981b5a23SParav Pandit work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2484981b5a23SParav Pandit } 2485981b5a23SParav Pandit 2486e51060f0SSean Hefty static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms) 2487e51060f0SSean Hefty { 2488e51060f0SSean Hefty struct rdma_route *route = &id_priv->id.route; 2489e51060f0SSean Hefty struct cma_work *work; 2490e51060f0SSean Hefty int ret; 2491e51060f0SSean Hefty 2492e51060f0SSean Hefty work = kzalloc(sizeof *work, GFP_KERNEL); 2493e51060f0SSean Hefty if (!work) 2494e51060f0SSean Hefty return -ENOMEM; 2495e51060f0SSean Hefty 2496981b5a23SParav Pandit cma_init_resolve_route_work(work, id_priv); 2497e51060f0SSean Hefty 2498e51060f0SSean Hefty route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); 2499e51060f0SSean Hefty if (!route->path_rec) { 2500e51060f0SSean Hefty ret = -ENOMEM; 2501e51060f0SSean Hefty goto err1; 2502e51060f0SSean Hefty } 2503e51060f0SSean Hefty 2504e51060f0SSean Hefty ret = cma_query_ib_route(id_priv, timeout_ms, work); 2505e51060f0SSean Hefty if (ret) 2506e51060f0SSean Hefty goto err2; 2507e51060f0SSean Hefty 2508e51060f0SSean Hefty return 0; 2509e51060f0SSean Hefty err2: 2510e51060f0SSean Hefty kfree(route->path_rec); 2511e51060f0SSean Hefty route->path_rec = NULL; 2512e51060f0SSean Hefty err1: 2513e51060f0SSean Hefty kfree(work); 2514e51060f0SSean Hefty return ret; 2515e51060f0SSean Hefty } 2516e51060f0SSean Hefty 25179327c7afSParav Pandit static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type, 25189327c7afSParav Pandit unsigned long supported_gids, 25199327c7afSParav Pandit enum ib_gid_type default_gid) 25209327c7afSParav Pandit { 25219327c7afSParav Pandit if ((network_type == RDMA_NETWORK_IPV4 || 25229327c7afSParav Pandit network_type == RDMA_NETWORK_IPV6) && 25239327c7afSParav Pandit test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids)) 25249327c7afSParav Pandit return IB_GID_TYPE_ROCE_UDP_ENCAP; 25259327c7afSParav Pandit 25269327c7afSParav Pandit return default_gid; 25279327c7afSParav Pandit } 25289327c7afSParav Pandit 25299327c7afSParav Pandit /* 25309327c7afSParav Pandit * cma_iboe_set_path_rec_l2_fields() is helper function which sets 25319327c7afSParav Pandit * path record type based on GID type. 25329327c7afSParav Pandit * It also sets up other L2 fields which includes destination mac address 25339327c7afSParav Pandit * netdev ifindex, of the path record. 25349327c7afSParav Pandit * It returns the netdev of the bound interface for this path record entry. 25359327c7afSParav Pandit */ 25369327c7afSParav Pandit static struct net_device * 25379327c7afSParav Pandit cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv) 25389327c7afSParav Pandit { 25399327c7afSParav Pandit struct rdma_route *route = &id_priv->id.route; 25409327c7afSParav Pandit enum ib_gid_type gid_type = IB_GID_TYPE_ROCE; 25419327c7afSParav Pandit struct rdma_addr *addr = &route->addr; 25429327c7afSParav Pandit unsigned long supported_gids; 25439327c7afSParav Pandit struct net_device *ndev; 25449327c7afSParav Pandit 25459327c7afSParav Pandit if (!addr->dev_addr.bound_dev_if) 25469327c7afSParav Pandit return NULL; 25479327c7afSParav Pandit 25489327c7afSParav Pandit ndev = dev_get_by_index(addr->dev_addr.net, 25499327c7afSParav Pandit addr->dev_addr.bound_dev_if); 25509327c7afSParav Pandit if (!ndev) 25519327c7afSParav Pandit return NULL; 25529327c7afSParav Pandit 25539327c7afSParav Pandit supported_gids = roce_gid_type_mask_support(id_priv->id.device, 25549327c7afSParav Pandit id_priv->id.port_num); 25559327c7afSParav Pandit gid_type = cma_route_gid_type(addr->dev_addr.network, 25569327c7afSParav Pandit supported_gids, 25579327c7afSParav Pandit id_priv->gid_type); 25589327c7afSParav Pandit /* Use the hint from IP Stack to select GID Type */ 25599327c7afSParav Pandit if (gid_type < ib_network_to_gid_type(addr->dev_addr.network)) 25609327c7afSParav Pandit gid_type = ib_network_to_gid_type(addr->dev_addr.network); 25619327c7afSParav Pandit route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type); 25629327c7afSParav Pandit 2563114cc9c4SParav Pandit route->path_rec->roce.route_resolved = true; 25649327c7afSParav Pandit sa_path_set_ndev(route->path_rec, addr->dev_addr.net); 25659327c7afSParav Pandit sa_path_set_ifindex(route->path_rec, ndev->ifindex); 25669327c7afSParav Pandit sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr); 25679327c7afSParav Pandit return ndev; 25689327c7afSParav Pandit } 25699327c7afSParav Pandit 2570fe75889fSParav Pandit int rdma_set_ib_path(struct rdma_cm_id *id, 2571fe75889fSParav Pandit struct sa_path_rec *path_rec) 2572e51060f0SSean Hefty { 2573e51060f0SSean Hefty struct rdma_id_private *id_priv; 25748d20a1f0SParav Pandit struct net_device *ndev; 2575e51060f0SSean Hefty int ret; 2576e51060f0SSean Hefty 2577e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 2578550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2579550e5ca7SNir Muchtar RDMA_CM_ROUTE_RESOLVED)) 2580e51060f0SSean Hefty return -EINVAL; 2581e51060f0SSean Hefty 2582fe75889fSParav Pandit id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec), 25839893e742SJulia Lawall GFP_KERNEL); 2584e51060f0SSean Hefty if (!id->route.path_rec) { 2585e51060f0SSean Hefty ret = -ENOMEM; 2586e51060f0SSean Hefty goto err; 2587e51060f0SSean Hefty } 2588e51060f0SSean Hefty 25898d20a1f0SParav Pandit if (rdma_protocol_roce(id->device, id->port_num)) { 25908d20a1f0SParav Pandit ndev = cma_iboe_set_path_rec_l2_fields(id_priv); 25918d20a1f0SParav Pandit if (!ndev) { 25928d20a1f0SParav Pandit ret = -ENODEV; 25938d20a1f0SParav Pandit goto err_free; 25948d20a1f0SParav Pandit } 25958d20a1f0SParav Pandit dev_put(ndev); 25968d20a1f0SParav Pandit } 25978d20a1f0SParav Pandit 2598fe75889fSParav Pandit id->route.num_paths = 1; 2599e51060f0SSean Hefty return 0; 26008d20a1f0SParav Pandit 26018d20a1f0SParav Pandit err_free: 26028d20a1f0SParav Pandit kfree(id->route.path_rec); 26038d20a1f0SParav Pandit id->route.path_rec = NULL; 2604e51060f0SSean Hefty err: 2605550e5ca7SNir Muchtar cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED); 2606e51060f0SSean Hefty return ret; 2607e51060f0SSean Hefty } 2608fe75889fSParav Pandit EXPORT_SYMBOL(rdma_set_ib_path); 2609e51060f0SSean Hefty 261007ebafbaSTom Tucker static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms) 261107ebafbaSTom Tucker { 261207ebafbaSTom Tucker struct cma_work *work; 261307ebafbaSTom Tucker 261407ebafbaSTom Tucker work = kzalloc(sizeof *work, GFP_KERNEL); 261507ebafbaSTom Tucker if (!work) 261607ebafbaSTom Tucker return -ENOMEM; 261707ebafbaSTom Tucker 2618981b5a23SParav Pandit cma_init_resolve_route_work(work, id_priv); 261907ebafbaSTom Tucker queue_work(cma_wq, &work->work); 262007ebafbaSTom Tucker return 0; 262107ebafbaSTom Tucker } 262207ebafbaSTom Tucker 2623eb072c4bSEyal Perry static int iboe_tos_to_sl(struct net_device *ndev, int tos) 2624eb072c4bSEyal Perry { 2625eb072c4bSEyal Perry int prio; 2626eb072c4bSEyal Perry struct net_device *dev; 2627eb072c4bSEyal Perry 2628eb072c4bSEyal Perry prio = rt_tos2priority(tos); 2629d0d7b10bSParav Pandit dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev; 2630eb072c4bSEyal Perry if (dev->num_tc) 2631eb072c4bSEyal Perry return netdev_get_prio_tc_map(dev, prio); 2632eb072c4bSEyal Perry 2633eb072c4bSEyal Perry #if IS_ENABLED(CONFIG_VLAN_8021Q) 2634d0d7b10bSParav Pandit if (is_vlan_dev(ndev)) 2635eb072c4bSEyal Perry return (vlan_dev_get_egress_qos_mask(ndev, prio) & 2636eb072c4bSEyal Perry VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 2637eb072c4bSEyal Perry #endif 2638eb072c4bSEyal Perry return 0; 2639eb072c4bSEyal Perry } 2640eb072c4bSEyal Perry 26413c86aa70SEli Cohen static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) 26423c86aa70SEli Cohen { 26433c86aa70SEli Cohen struct rdma_route *route = &id_priv->id.route; 26443c86aa70SEli Cohen struct rdma_addr *addr = &route->addr; 26453c86aa70SEli Cohen struct cma_work *work; 26463c86aa70SEli Cohen int ret; 26474367ec7fSParav Pandit struct net_device *ndev; 26484367ec7fSParav Pandit 264989052d78SMajd Dibbiny u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num - 265089052d78SMajd Dibbiny rdma_start_port(id_priv->cma_dev->device)]; 265189052d78SMajd Dibbiny u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos; 2652dd5f03beSMatan Barak 26533c86aa70SEli Cohen 26543c86aa70SEli Cohen work = kzalloc(sizeof *work, GFP_KERNEL); 26553c86aa70SEli Cohen if (!work) 26563c86aa70SEli Cohen return -ENOMEM; 26573c86aa70SEli Cohen 26583c86aa70SEli Cohen route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL); 26593c86aa70SEli Cohen if (!route->path_rec) { 26603c86aa70SEli Cohen ret = -ENOMEM; 26613c86aa70SEli Cohen goto err1; 26623c86aa70SEli Cohen } 26633c86aa70SEli Cohen 26643c86aa70SEli Cohen route->num_paths = 1; 26653c86aa70SEli Cohen 26669327c7afSParav Pandit ndev = cma_iboe_set_path_rec_l2_fields(id_priv); 266723d70503SWei Yongjun if (!ndev) { 266823d70503SWei Yongjun ret = -ENODEV; 266923d70503SWei Yongjun goto err2; 267023d70503SWei Yongjun } 267120029832SMatan Barak 26727b85627bSMoni Shoua rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 26737b85627bSMoni Shoua &route->path_rec->sgid); 26747b85627bSMoni Shoua rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr, 26757b85627bSMoni Shoua &route->path_rec->dgid); 2676af7bd463SEli Cohen 2677c3efe750SMatan Barak if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB) 2678c865f246SSomnath Kotur /* TODO: get the hoplimit from the inet/inet6 device */ 2679c3efe750SMatan Barak route->path_rec->hop_limit = addr->dev_addr.hoplimit; 2680c3efe750SMatan Barak else 2681af7bd463SEli Cohen route->path_rec->hop_limit = 1; 2682af7bd463SEli Cohen route->path_rec->reversible = 1; 2683af7bd463SEli Cohen route->path_rec->pkey = cpu_to_be16(0xffff); 2684af7bd463SEli Cohen route->path_rec->mtu_selector = IB_SA_EQ; 268589052d78SMajd Dibbiny route->path_rec->sl = iboe_tos_to_sl(ndev, tos); 268689052d78SMajd Dibbiny route->path_rec->traffic_class = tos; 26873c86aa70SEli Cohen route->path_rec->mtu = iboe_get_mtu(ndev->mtu); 26883c86aa70SEli Cohen route->path_rec->rate_selector = IB_SA_EQ; 26893c86aa70SEli Cohen route->path_rec->rate = iboe_get_rate(ndev); 26903c86aa70SEli Cohen dev_put(ndev); 26913c86aa70SEli Cohen route->path_rec->packet_life_time_selector = IB_SA_EQ; 26923c86aa70SEli Cohen route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME; 26933c86aa70SEli Cohen if (!route->path_rec->mtu) { 26943c86aa70SEli Cohen ret = -EINVAL; 26953c86aa70SEli Cohen goto err2; 26963c86aa70SEli Cohen } 26973c86aa70SEli Cohen 2698981b5a23SParav Pandit cma_init_resolve_route_work(work, id_priv); 26993c86aa70SEli Cohen queue_work(cma_wq, &work->work); 27003c86aa70SEli Cohen 27013c86aa70SEli Cohen return 0; 27023c86aa70SEli Cohen 27033c86aa70SEli Cohen err2: 27043c86aa70SEli Cohen kfree(route->path_rec); 27053c86aa70SEli Cohen route->path_rec = NULL; 27063c86aa70SEli Cohen err1: 27073c86aa70SEli Cohen kfree(work); 27083c86aa70SEli Cohen return ret; 27093c86aa70SEli Cohen } 27103c86aa70SEli Cohen 2711e51060f0SSean Hefty int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms) 2712e51060f0SSean Hefty { 2713e51060f0SSean Hefty struct rdma_id_private *id_priv; 2714e51060f0SSean Hefty int ret; 2715e51060f0SSean Hefty 2716e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 2717550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY)) 2718e51060f0SSean Hefty return -EINVAL; 2719e51060f0SSean Hefty 2720e51060f0SSean Hefty atomic_inc(&id_priv->refcount); 2721fe53ba2fSMichael Wang if (rdma_cap_ib_sa(id->device, id->port_num)) 2722e51060f0SSean Hefty ret = cma_resolve_ib_route(id_priv, timeout_ms); 27235d9fb044SIra Weiny else if (rdma_protocol_roce(id->device, id->port_num)) 27243c86aa70SEli Cohen ret = cma_resolve_iboe_route(id_priv); 2725c72f2189SMichael Wang else if (rdma_protocol_iwarp(id->device, id->port_num)) 272607ebafbaSTom Tucker ret = cma_resolve_iw_route(id_priv, timeout_ms); 2727c72f2189SMichael Wang else 2728e51060f0SSean Hefty ret = -ENOSYS; 2729c72f2189SMichael Wang 2730e51060f0SSean Hefty if (ret) 2731e51060f0SSean Hefty goto err; 2732e51060f0SSean Hefty 2733e51060f0SSean Hefty return 0; 2734e51060f0SSean Hefty err: 2735550e5ca7SNir Muchtar cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED); 2736e51060f0SSean Hefty cma_deref_id(id_priv); 2737e51060f0SSean Hefty return ret; 2738e51060f0SSean Hefty } 2739e51060f0SSean Hefty EXPORT_SYMBOL(rdma_resolve_route); 2740e51060f0SSean Hefty 27416a3e362dSSean Hefty static void cma_set_loopback(struct sockaddr *addr) 27426a3e362dSSean Hefty { 27436a3e362dSSean Hefty switch (addr->sa_family) { 27446a3e362dSSean Hefty case AF_INET: 27456a3e362dSSean Hefty ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 27466a3e362dSSean Hefty break; 27476a3e362dSSean Hefty case AF_INET6: 27486a3e362dSSean Hefty ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr, 27496a3e362dSSean Hefty 0, 0, 0, htonl(1)); 27506a3e362dSSean Hefty break; 27516a3e362dSSean Hefty default: 27526a3e362dSSean Hefty ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr, 27536a3e362dSSean Hefty 0, 0, 0, htonl(1)); 27546a3e362dSSean Hefty break; 27556a3e362dSSean Hefty } 27566a3e362dSSean Hefty } 27576a3e362dSSean Hefty 2758e51060f0SSean Hefty static int cma_bind_loopback(struct rdma_id_private *id_priv) 2759e51060f0SSean Hefty { 2760b0569e40SSean Hefty struct cma_device *cma_dev, *cur_dev; 2761f0ee3404SMichael S. Tsirkin union ib_gid gid; 2762102c5ce0SJack Wang enum ib_port_state port_state; 2763e51060f0SSean Hefty u16 pkey; 2764e51060f0SSean Hefty int ret; 2765e51060f0SSean Hefty u8 p; 2766e51060f0SSean Hefty 2767b0569e40SSean Hefty cma_dev = NULL; 2768e51060f0SSean Hefty mutex_lock(&lock); 2769b0569e40SSean Hefty list_for_each_entry(cur_dev, &dev_list, list) { 2770b0569e40SSean Hefty if (cma_family(id_priv) == AF_IB && 277172219ceaSMichael Wang !rdma_cap_ib_cm(cur_dev->device, 1)) 2772b0569e40SSean Hefty continue; 2773b0569e40SSean Hefty 2774b0569e40SSean Hefty if (!cma_dev) 2775b0569e40SSean Hefty cma_dev = cur_dev; 2776b0569e40SSean Hefty 2777b0569e40SSean Hefty for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) { 2778102c5ce0SJack Wang if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) && 2779102c5ce0SJack Wang port_state == IB_PORT_ACTIVE) { 2780b0569e40SSean Hefty cma_dev = cur_dev; 2781b0569e40SSean Hefty goto port_found; 2782b0569e40SSean Hefty } 2783b0569e40SSean Hefty } 2784b0569e40SSean Hefty } 2785b0569e40SSean Hefty 2786b0569e40SSean Hefty if (!cma_dev) { 2787e82153b5SKrishna Kumar ret = -ENODEV; 2788e82153b5SKrishna Kumar goto out; 2789e82153b5SKrishna Kumar } 2790e51060f0SSean Hefty 2791e51060f0SSean Hefty p = 1; 2792e51060f0SSean Hefty 2793e51060f0SSean Hefty port_found: 279455ee3ab2SMatan Barak ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL); 2795e51060f0SSean Hefty if (ret) 2796e51060f0SSean Hefty goto out; 2797e51060f0SSean Hefty 2798e51060f0SSean Hefty ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey); 2799e51060f0SSean Hefty if (ret) 2800e51060f0SSean Hefty goto out; 2801e51060f0SSean Hefty 28026f8372b6SSean Hefty id_priv->id.route.addr.dev_addr.dev_type = 280321655afcSMichael Wang (rdma_protocol_ib(cma_dev->device, p)) ? 28046f8372b6SSean Hefty ARPHRD_INFINIBAND : ARPHRD_ETHER; 28056f8372b6SSean Hefty 28066f8372b6SSean Hefty rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid); 2807e51060f0SSean Hefty ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey); 2808e51060f0SSean Hefty id_priv->id.port_num = p; 2809e51060f0SSean Hefty cma_attach_to_dev(id_priv, cma_dev); 2810f4753834SSean Hefty cma_set_loopback(cma_src_addr(id_priv)); 2811e51060f0SSean Hefty out: 2812e51060f0SSean Hefty mutex_unlock(&lock); 2813e51060f0SSean Hefty return ret; 2814e51060f0SSean Hefty } 2815e51060f0SSean Hefty 2816e51060f0SSean Hefty static void addr_handler(int status, struct sockaddr *src_addr, 2817e51060f0SSean Hefty struct rdma_dev_addr *dev_addr, void *context) 2818e51060f0SSean Hefty { 2819e51060f0SSean Hefty struct rdma_id_private *id_priv = context; 2820a1b1b61fSSean Hefty struct rdma_cm_event event; 2821e51060f0SSean Hefty 2822a1b1b61fSSean Hefty memset(&event, 0, sizeof event); 2823de910bd9SOr Gerlitz mutex_lock(&id_priv->handler_mutex); 2824550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, 2825550e5ca7SNir Muchtar RDMA_CM_ADDR_RESOLVED)) 282661a73c70SSean Hefty goto out; 282761a73c70SSean Hefty 28287b85627bSMoni Shoua memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr)); 2829498683c6SMoni Shoua if (!status && !id_priv->cma_dev) { 2830be9130ccSDoug Ledford status = cma_acquire_dev(id_priv, NULL); 2831498683c6SMoni Shoua if (status) 2832498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n", 2833498683c6SMoni Shoua status); 2834498683c6SMoni Shoua } else { 2835498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status); 2836498683c6SMoni Shoua } 2837e51060f0SSean Hefty 2838e51060f0SSean Hefty if (status) { 2839550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, 2840550e5ca7SNir Muchtar RDMA_CM_ADDR_BOUND)) 2841e51060f0SSean Hefty goto out; 2842a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_ADDR_ERROR; 2843a1b1b61fSSean Hefty event.status = status; 28447b85627bSMoni Shoua } else 2845a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_ADDR_RESOLVED; 2846e51060f0SSean Hefty 2847a1b1b61fSSean Hefty if (id_priv->id.event_handler(&id_priv->id, &event)) { 2848550e5ca7SNir Muchtar cma_exch(id_priv, RDMA_CM_DESTROYING); 2849de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 2850e51060f0SSean Hefty cma_deref_id(id_priv); 2851e51060f0SSean Hefty rdma_destroy_id(&id_priv->id); 2852e51060f0SSean Hefty return; 2853e51060f0SSean Hefty } 2854e51060f0SSean Hefty out: 2855de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 2856e51060f0SSean Hefty cma_deref_id(id_priv); 2857e51060f0SSean Hefty } 2858e51060f0SSean Hefty 2859e51060f0SSean Hefty static int cma_resolve_loopback(struct rdma_id_private *id_priv) 2860e51060f0SSean Hefty { 2861e51060f0SSean Hefty struct cma_work *work; 2862f0ee3404SMichael S. Tsirkin union ib_gid gid; 2863e51060f0SSean Hefty int ret; 2864e51060f0SSean Hefty 2865e51060f0SSean Hefty work = kzalloc(sizeof *work, GFP_KERNEL); 2866e51060f0SSean Hefty if (!work) 2867e51060f0SSean Hefty return -ENOMEM; 2868e51060f0SSean Hefty 2869e51060f0SSean Hefty if (!id_priv->cma_dev) { 2870e51060f0SSean Hefty ret = cma_bind_loopback(id_priv); 2871e51060f0SSean Hefty if (ret) 2872e51060f0SSean Hefty goto err; 2873e51060f0SSean Hefty } 2874e51060f0SSean Hefty 28756f8372b6SSean Hefty rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid); 28766f8372b6SSean Hefty rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid); 2877e51060f0SSean Hefty 2878981b5a23SParav Pandit cma_init_resolve_addr_work(work, id_priv); 2879e51060f0SSean Hefty queue_work(cma_wq, &work->work); 2880e51060f0SSean Hefty return 0; 2881e51060f0SSean Hefty err: 2882e51060f0SSean Hefty kfree(work); 2883e51060f0SSean Hefty return ret; 2884e51060f0SSean Hefty } 2885e51060f0SSean Hefty 2886f17df3b0SSean Hefty static int cma_resolve_ib_addr(struct rdma_id_private *id_priv) 2887f17df3b0SSean Hefty { 2888f17df3b0SSean Hefty struct cma_work *work; 2889f17df3b0SSean Hefty int ret; 2890f17df3b0SSean Hefty 2891f17df3b0SSean Hefty work = kzalloc(sizeof *work, GFP_KERNEL); 2892f17df3b0SSean Hefty if (!work) 2893f17df3b0SSean Hefty return -ENOMEM; 2894f17df3b0SSean Hefty 2895f17df3b0SSean Hefty if (!id_priv->cma_dev) { 2896f17df3b0SSean Hefty ret = cma_resolve_ib_dev(id_priv); 2897f17df3b0SSean Hefty if (ret) 2898f17df3b0SSean Hefty goto err; 2899f17df3b0SSean Hefty } 2900f17df3b0SSean Hefty 2901f17df3b0SSean Hefty rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *) 2902f17df3b0SSean Hefty &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr)); 2903f17df3b0SSean Hefty 2904981b5a23SParav Pandit cma_init_resolve_addr_work(work, id_priv); 2905f17df3b0SSean Hefty queue_work(cma_wq, &work->work); 2906f17df3b0SSean Hefty return 0; 2907f17df3b0SSean Hefty err: 2908f17df3b0SSean Hefty kfree(work); 2909f17df3b0SSean Hefty return ret; 2910f17df3b0SSean Hefty } 2911f17df3b0SSean Hefty 2912e51060f0SSean Hefty static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2913e51060f0SSean Hefty struct sockaddr *dst_addr) 2914e51060f0SSean Hefty { 2915d14714dfSSean Hefty if (!src_addr || !src_addr->sa_family) { 2916d14714dfSSean Hefty src_addr = (struct sockaddr *) &id->route.addr.src_addr; 2917f17df3b0SSean Hefty src_addr->sa_family = dst_addr->sa_family; 2918b4cfe397SJack Morgenstein if (IS_ENABLED(CONFIG_IPV6) && 2919b4cfe397SJack Morgenstein dst_addr->sa_family == AF_INET6) { 29206c26a771SSpencer Baugh struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr; 29216c26a771SSpencer Baugh struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr; 29226c26a771SSpencer Baugh src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id; 29236c26a771SSpencer Baugh if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL) 29246c26a771SSpencer Baugh id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id; 2925f17df3b0SSean Hefty } else if (dst_addr->sa_family == AF_IB) { 2926f17df3b0SSean Hefty ((struct sockaddr_ib *) src_addr)->sib_pkey = 2927f17df3b0SSean Hefty ((struct sockaddr_ib *) dst_addr)->sib_pkey; 2928d14714dfSSean Hefty } 2929d14714dfSSean Hefty } 2930e51060f0SSean Hefty return rdma_bind_addr(id, src_addr); 2931e51060f0SSean Hefty } 2932e51060f0SSean Hefty 2933e51060f0SSean Hefty int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 2934e51060f0SSean Hefty struct sockaddr *dst_addr, int timeout_ms) 2935e51060f0SSean Hefty { 2936e51060f0SSean Hefty struct rdma_id_private *id_priv; 2937e51060f0SSean Hefty int ret; 2938e51060f0SSean Hefty 2939e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 294019b752a1SMoni Shoua memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr)); 2941550e5ca7SNir Muchtar if (id_priv->state == RDMA_CM_IDLE) { 2942e51060f0SSean Hefty ret = cma_bind_addr(id, src_addr, dst_addr); 294319b752a1SMoni Shoua if (ret) { 294419b752a1SMoni Shoua memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr)); 2945e51060f0SSean Hefty return ret; 2946e51060f0SSean Hefty } 294719b752a1SMoni Shoua } 2948e51060f0SSean Hefty 294919b752a1SMoni Shoua if (cma_family(id_priv) != dst_addr->sa_family) { 295019b752a1SMoni Shoua memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr)); 29514ae7152eSSean Hefty return -EINVAL; 295219b752a1SMoni Shoua } 29534ae7152eSSean Hefty 295419b752a1SMoni Shoua if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) { 295519b752a1SMoni Shoua memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr)); 2956e51060f0SSean Hefty return -EINVAL; 295719b752a1SMoni Shoua } 2958e51060f0SSean Hefty 2959e51060f0SSean Hefty atomic_inc(&id_priv->refcount); 2960f17df3b0SSean Hefty if (cma_any_addr(dst_addr)) { 2961e51060f0SSean Hefty ret = cma_resolve_loopback(id_priv); 2962f17df3b0SSean Hefty } else { 2963f17df3b0SSean Hefty if (dst_addr->sa_family == AF_IB) { 2964f17df3b0SSean Hefty ret = cma_resolve_ib_addr(id_priv); 2965f17df3b0SSean Hefty } else { 2966ee6548d1SJason Gunthorpe ret = rdma_resolve_ip(cma_src_addr(id_priv), 29677a118df3SSean Hefty dst_addr, &id->route.addr.dev_addr, 2968e51060f0SSean Hefty timeout_ms, addr_handler, id_priv); 2969f17df3b0SSean Hefty } 2970f17df3b0SSean Hefty } 2971e51060f0SSean Hefty if (ret) 2972e51060f0SSean Hefty goto err; 2973e51060f0SSean Hefty 2974e51060f0SSean Hefty return 0; 2975e51060f0SSean Hefty err: 2976550e5ca7SNir Muchtar cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND); 2977e51060f0SSean Hefty cma_deref_id(id_priv); 2978e51060f0SSean Hefty return ret; 2979e51060f0SSean Hefty } 2980e51060f0SSean Hefty EXPORT_SYMBOL(rdma_resolve_addr); 2981e51060f0SSean Hefty 2982a9bb7912SHefty, Sean int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) 2983a9bb7912SHefty, Sean { 2984a9bb7912SHefty, Sean struct rdma_id_private *id_priv; 2985a9bb7912SHefty, Sean unsigned long flags; 2986a9bb7912SHefty, Sean int ret; 2987a9bb7912SHefty, Sean 2988a9bb7912SHefty, Sean id_priv = container_of(id, struct rdma_id_private, id); 2989a9bb7912SHefty, Sean spin_lock_irqsave(&id_priv->lock, flags); 2990c8dea2f9SSean Hefty if (reuse || id_priv->state == RDMA_CM_IDLE) { 2991a9bb7912SHefty, Sean id_priv->reuseaddr = reuse; 2992a9bb7912SHefty, Sean ret = 0; 2993a9bb7912SHefty, Sean } else { 2994a9bb7912SHefty, Sean ret = -EINVAL; 2995a9bb7912SHefty, Sean } 2996a9bb7912SHefty, Sean spin_unlock_irqrestore(&id_priv->lock, flags); 2997a9bb7912SHefty, Sean return ret; 2998a9bb7912SHefty, Sean } 2999a9bb7912SHefty, Sean EXPORT_SYMBOL(rdma_set_reuseaddr); 3000a9bb7912SHefty, Sean 300168602120SSean Hefty int rdma_set_afonly(struct rdma_cm_id *id, int afonly) 300268602120SSean Hefty { 300368602120SSean Hefty struct rdma_id_private *id_priv; 300468602120SSean Hefty unsigned long flags; 300568602120SSean Hefty int ret; 300668602120SSean Hefty 300768602120SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 300868602120SSean Hefty spin_lock_irqsave(&id_priv->lock, flags); 300968602120SSean Hefty if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) { 301068602120SSean Hefty id_priv->options |= (1 << CMA_OPTION_AFONLY); 301168602120SSean Hefty id_priv->afonly = afonly; 301268602120SSean Hefty ret = 0; 301368602120SSean Hefty } else { 301468602120SSean Hefty ret = -EINVAL; 301568602120SSean Hefty } 301668602120SSean Hefty spin_unlock_irqrestore(&id_priv->lock, flags); 301768602120SSean Hefty return ret; 301868602120SSean Hefty } 301968602120SSean Hefty EXPORT_SYMBOL(rdma_set_afonly); 302068602120SSean Hefty 3021e51060f0SSean Hefty static void cma_bind_port(struct rdma_bind_list *bind_list, 3022e51060f0SSean Hefty struct rdma_id_private *id_priv) 3023e51060f0SSean Hefty { 302458afdcb7SSean Hefty struct sockaddr *addr; 302558afdcb7SSean Hefty struct sockaddr_ib *sib; 302658afdcb7SSean Hefty u64 sid, mask; 302758afdcb7SSean Hefty __be16 port; 3028e51060f0SSean Hefty 3029f4753834SSean Hefty addr = cma_src_addr(id_priv); 303058afdcb7SSean Hefty port = htons(bind_list->port); 303158afdcb7SSean Hefty 303258afdcb7SSean Hefty switch (addr->sa_family) { 303358afdcb7SSean Hefty case AF_INET: 303458afdcb7SSean Hefty ((struct sockaddr_in *) addr)->sin_port = port; 303558afdcb7SSean Hefty break; 303658afdcb7SSean Hefty case AF_INET6: 303758afdcb7SSean Hefty ((struct sockaddr_in6 *) addr)->sin6_port = port; 303858afdcb7SSean Hefty break; 303958afdcb7SSean Hefty case AF_IB: 304058afdcb7SSean Hefty sib = (struct sockaddr_ib *) addr; 304158afdcb7SSean Hefty sid = be64_to_cpu(sib->sib_sid); 304258afdcb7SSean Hefty mask = be64_to_cpu(sib->sib_sid_mask); 304358afdcb7SSean Hefty sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port)); 304458afdcb7SSean Hefty sib->sib_sid_mask = cpu_to_be64(~0ULL); 304558afdcb7SSean Hefty break; 304658afdcb7SSean Hefty } 3047e51060f0SSean Hefty id_priv->bind_list = bind_list; 3048e51060f0SSean Hefty hlist_add_head(&id_priv->node, &bind_list->owners); 3049e51060f0SSean Hefty } 3050e51060f0SSean Hefty 30512253fc0cSSteve Wise static int cma_alloc_port(enum rdma_ucm_port_space ps, 3052aac978e1SHaggai Eran struct rdma_id_private *id_priv, unsigned short snum) 3053e51060f0SSean Hefty { 3054e51060f0SSean Hefty struct rdma_bind_list *bind_list; 30553b069c5dSTejun Heo int ret; 3056e51060f0SSean Hefty 3057cb164b8cSSean Hefty bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); 3058e51060f0SSean Hefty if (!bind_list) 3059e51060f0SSean Hefty return -ENOMEM; 3060e51060f0SSean Hefty 3061fa20105eSGuy Shapiro ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list, 3062fa20105eSGuy Shapiro snum); 30633b069c5dSTejun Heo if (ret < 0) 30643b069c5dSTejun Heo goto err; 3065e51060f0SSean Hefty 3066e51060f0SSean Hefty bind_list->ps = ps; 30673b069c5dSTejun Heo bind_list->port = (unsigned short)ret; 3068e51060f0SSean Hefty cma_bind_port(bind_list, id_priv); 3069e51060f0SSean Hefty return 0; 30703b069c5dSTejun Heo err: 3071aedec080SSean Hefty kfree(bind_list); 30723b069c5dSTejun Heo return ret == -ENOSPC ? -EADDRNOTAVAIL : ret; 3073aedec080SSean Hefty } 3074aedec080SSean Hefty 307519b752a1SMoni Shoua static int cma_port_is_unique(struct rdma_bind_list *bind_list, 307619b752a1SMoni Shoua struct rdma_id_private *id_priv) 307719b752a1SMoni Shoua { 307819b752a1SMoni Shoua struct rdma_id_private *cur_id; 307919b752a1SMoni Shoua struct sockaddr *daddr = cma_dst_addr(id_priv); 308019b752a1SMoni Shoua struct sockaddr *saddr = cma_src_addr(id_priv); 308119b752a1SMoni Shoua __be16 dport = cma_port(daddr); 308219b752a1SMoni Shoua 308319b752a1SMoni Shoua hlist_for_each_entry(cur_id, &bind_list->owners, node) { 308419b752a1SMoni Shoua struct sockaddr *cur_daddr = cma_dst_addr(cur_id); 308519b752a1SMoni Shoua struct sockaddr *cur_saddr = cma_src_addr(cur_id); 308619b752a1SMoni Shoua __be16 cur_dport = cma_port(cur_daddr); 308719b752a1SMoni Shoua 308819b752a1SMoni Shoua if (id_priv == cur_id) 308919b752a1SMoni Shoua continue; 309019b752a1SMoni Shoua 309119b752a1SMoni Shoua /* different dest port -> unique */ 30929dea9a2fSTatyana Nikolova if (!cma_any_port(daddr) && 30939dea9a2fSTatyana Nikolova !cma_any_port(cur_daddr) && 309419b752a1SMoni Shoua (dport != cur_dport)) 309519b752a1SMoni Shoua continue; 309619b752a1SMoni Shoua 309719b752a1SMoni Shoua /* different src address -> unique */ 309819b752a1SMoni Shoua if (!cma_any_addr(saddr) && 309919b752a1SMoni Shoua !cma_any_addr(cur_saddr) && 310019b752a1SMoni Shoua cma_addr_cmp(saddr, cur_saddr)) 310119b752a1SMoni Shoua continue; 310219b752a1SMoni Shoua 310319b752a1SMoni Shoua /* different dst address -> unique */ 31049dea9a2fSTatyana Nikolova if (!cma_any_addr(daddr) && 31059dea9a2fSTatyana Nikolova !cma_any_addr(cur_daddr) && 310619b752a1SMoni Shoua cma_addr_cmp(daddr, cur_daddr)) 310719b752a1SMoni Shoua continue; 310819b752a1SMoni Shoua 310919b752a1SMoni Shoua return -EADDRNOTAVAIL; 311019b752a1SMoni Shoua } 311119b752a1SMoni Shoua return 0; 311219b752a1SMoni Shoua } 311319b752a1SMoni Shoua 31142253fc0cSSteve Wise static int cma_alloc_any_port(enum rdma_ucm_port_space ps, 3115aac978e1SHaggai Eran struct rdma_id_private *id_priv) 3116aedec080SSean Hefty { 31175d7220e8STetsuo Handa static unsigned int last_used_port; 31185d7220e8STetsuo Handa int low, high, remaining; 31195d7220e8STetsuo Handa unsigned int rover; 3120fa20105eSGuy Shapiro struct net *net = id_priv->id.route.addr.dev_addr.net; 3121aedec080SSean Hefty 3122fa20105eSGuy Shapiro inet_get_local_port_range(net, &low, &high); 31235d7220e8STetsuo Handa remaining = (high - low) + 1; 312463862b5bSAruna-Hewapathirane rover = prandom_u32() % remaining + low; 31255d7220e8STetsuo Handa retry: 312619b752a1SMoni Shoua if (last_used_port != rover) { 312719b752a1SMoni Shoua struct rdma_bind_list *bind_list; 312819b752a1SMoni Shoua int ret; 312919b752a1SMoni Shoua 313019b752a1SMoni Shoua bind_list = cma_ps_find(net, ps, (unsigned short)rover); 313119b752a1SMoni Shoua 313219b752a1SMoni Shoua if (!bind_list) { 313319b752a1SMoni Shoua ret = cma_alloc_port(ps, id_priv, rover); 313419b752a1SMoni Shoua } else { 313519b752a1SMoni Shoua ret = cma_port_is_unique(bind_list, id_priv); 313619b752a1SMoni Shoua if (!ret) 313719b752a1SMoni Shoua cma_bind_port(bind_list, id_priv); 313819b752a1SMoni Shoua } 31395d7220e8STetsuo Handa /* 31405d7220e8STetsuo Handa * Remember previously used port number in order to avoid 31415d7220e8STetsuo Handa * re-using same port immediately after it is closed. 31425d7220e8STetsuo Handa */ 31435d7220e8STetsuo Handa if (!ret) 31445d7220e8STetsuo Handa last_used_port = rover; 31455d7220e8STetsuo Handa if (ret != -EADDRNOTAVAIL) 31465d7220e8STetsuo Handa return ret; 31475d7220e8STetsuo Handa } 31485d7220e8STetsuo Handa if (--remaining) { 31495d7220e8STetsuo Handa rover++; 31505d7220e8STetsuo Handa if ((rover < low) || (rover > high)) 31515d7220e8STetsuo Handa rover = low; 3152aedec080SSean Hefty goto retry; 3153aedec080SSean Hefty } 31545d7220e8STetsuo Handa return -EADDRNOTAVAIL; 3155e51060f0SSean Hefty } 3156e51060f0SSean Hefty 3157a9bb7912SHefty, Sean /* 3158a9bb7912SHefty, Sean * Check that the requested port is available. This is called when trying to 3159a9bb7912SHefty, Sean * bind to a specific port, or when trying to listen on a bound port. In 3160a9bb7912SHefty, Sean * the latter case, the provided id_priv may already be on the bind_list, but 3161a9bb7912SHefty, Sean * we still need to check that it's okay to start listening. 3162a9bb7912SHefty, Sean */ 3163a9bb7912SHefty, Sean static int cma_check_port(struct rdma_bind_list *bind_list, 3164a9bb7912SHefty, Sean struct rdma_id_private *id_priv, uint8_t reuseaddr) 3165e51060f0SSean Hefty { 3166e51060f0SSean Hefty struct rdma_id_private *cur_id; 316743b752daSHefty, Sean struct sockaddr *addr, *cur_addr; 3168e51060f0SSean Hefty 3169f4753834SSean Hefty addr = cma_src_addr(id_priv); 3170b67bfe0dSSasha Levin hlist_for_each_entry(cur_id, &bind_list->owners, node) { 3171a9bb7912SHefty, Sean if (id_priv == cur_id) 3172a9bb7912SHefty, Sean continue; 3173a9bb7912SHefty, Sean 31745b0ec991SSean Hefty if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && 31755b0ec991SSean Hefty cur_id->reuseaddr) 31765b0ec991SSean Hefty continue; 31775b0ec991SSean Hefty 3178f4753834SSean Hefty cur_addr = cma_src_addr(cur_id); 31795b0ec991SSean Hefty if (id_priv->afonly && cur_id->afonly && 31805b0ec991SSean Hefty (addr->sa_family != cur_addr->sa_family)) 31815b0ec991SSean Hefty continue; 31825b0ec991SSean Hefty 31835b0ec991SSean Hefty if (cma_any_addr(addr) || cma_any_addr(cur_addr)) 3184e51060f0SSean Hefty return -EADDRNOTAVAIL; 3185e51060f0SSean Hefty 318643b752daSHefty, Sean if (!cma_addr_cmp(addr, cur_addr)) 3187e51060f0SSean Hefty return -EADDRINUSE; 3188e51060f0SSean Hefty } 3189e51060f0SSean Hefty return 0; 3190e51060f0SSean Hefty } 3191e51060f0SSean Hefty 31922253fc0cSSteve Wise static int cma_use_port(enum rdma_ucm_port_space ps, 3193aac978e1SHaggai Eran struct rdma_id_private *id_priv) 3194a9bb7912SHefty, Sean { 3195a9bb7912SHefty, Sean struct rdma_bind_list *bind_list; 3196a9bb7912SHefty, Sean unsigned short snum; 3197a9bb7912SHefty, Sean int ret; 3198a9bb7912SHefty, Sean 3199f4753834SSean Hefty snum = ntohs(cma_port(cma_src_addr(id_priv))); 3200a9bb7912SHefty, Sean if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) 3201a9bb7912SHefty, Sean return -EACCES; 3202a9bb7912SHefty, Sean 3203fa20105eSGuy Shapiro bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum); 3204a9bb7912SHefty, Sean if (!bind_list) { 3205a9bb7912SHefty, Sean ret = cma_alloc_port(ps, id_priv, snum); 3206a9bb7912SHefty, Sean } else { 3207a9bb7912SHefty, Sean ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr); 3208a9bb7912SHefty, Sean if (!ret) 3209a9bb7912SHefty, Sean cma_bind_port(bind_list, id_priv); 3210a9bb7912SHefty, Sean } 3211a9bb7912SHefty, Sean return ret; 3212a9bb7912SHefty, Sean } 3213a9bb7912SHefty, Sean 3214a9bb7912SHefty, Sean static int cma_bind_listen(struct rdma_id_private *id_priv) 3215a9bb7912SHefty, Sean { 3216a9bb7912SHefty, Sean struct rdma_bind_list *bind_list = id_priv->bind_list; 3217a9bb7912SHefty, Sean int ret = 0; 3218a9bb7912SHefty, Sean 3219a9bb7912SHefty, Sean mutex_lock(&lock); 3220a9bb7912SHefty, Sean if (bind_list->owners.first->next) 3221a9bb7912SHefty, Sean ret = cma_check_port(bind_list, id_priv, 0); 3222a9bb7912SHefty, Sean mutex_unlock(&lock); 3223a9bb7912SHefty, Sean return ret; 3224a9bb7912SHefty, Sean } 3225a9bb7912SHefty, Sean 32262253fc0cSSteve Wise static enum rdma_ucm_port_space 32272253fc0cSSteve Wise cma_select_inet_ps(struct rdma_id_private *id_priv) 322858afdcb7SSean Hefty { 322958afdcb7SSean Hefty switch (id_priv->id.ps) { 323058afdcb7SSean Hefty case RDMA_PS_TCP: 323158afdcb7SSean Hefty case RDMA_PS_UDP: 323258afdcb7SSean Hefty case RDMA_PS_IPOIB: 323358afdcb7SSean Hefty case RDMA_PS_IB: 3234aac978e1SHaggai Eran return id_priv->id.ps; 323558afdcb7SSean Hefty default: 3236aac978e1SHaggai Eran 3237aac978e1SHaggai Eran return 0; 323858afdcb7SSean Hefty } 323958afdcb7SSean Hefty } 324058afdcb7SSean Hefty 32412253fc0cSSteve Wise static enum rdma_ucm_port_space 32422253fc0cSSteve Wise cma_select_ib_ps(struct rdma_id_private *id_priv) 324358afdcb7SSean Hefty { 32442253fc0cSSteve Wise enum rdma_ucm_port_space ps = 0; 324558afdcb7SSean Hefty struct sockaddr_ib *sib; 324658afdcb7SSean Hefty u64 sid_ps, mask, sid; 324758afdcb7SSean Hefty 3248f4753834SSean Hefty sib = (struct sockaddr_ib *) cma_src_addr(id_priv); 324958afdcb7SSean Hefty mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK; 325058afdcb7SSean Hefty sid = be64_to_cpu(sib->sib_sid) & mask; 325158afdcb7SSean Hefty 325258afdcb7SSean Hefty if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) { 325358afdcb7SSean Hefty sid_ps = RDMA_IB_IP_PS_IB; 3254aac978e1SHaggai Eran ps = RDMA_PS_IB; 325558afdcb7SSean Hefty } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) && 325658afdcb7SSean Hefty (sid == (RDMA_IB_IP_PS_TCP & mask))) { 325758afdcb7SSean Hefty sid_ps = RDMA_IB_IP_PS_TCP; 3258aac978e1SHaggai Eran ps = RDMA_PS_TCP; 325958afdcb7SSean Hefty } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) && 326058afdcb7SSean Hefty (sid == (RDMA_IB_IP_PS_UDP & mask))) { 326158afdcb7SSean Hefty sid_ps = RDMA_IB_IP_PS_UDP; 3262aac978e1SHaggai Eran ps = RDMA_PS_UDP; 326358afdcb7SSean Hefty } 326458afdcb7SSean Hefty 326558afdcb7SSean Hefty if (ps) { 326658afdcb7SSean Hefty sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib))); 326758afdcb7SSean Hefty sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK | 326858afdcb7SSean Hefty be64_to_cpu(sib->sib_sid_mask)); 326958afdcb7SSean Hefty } 327058afdcb7SSean Hefty return ps; 327158afdcb7SSean Hefty } 327258afdcb7SSean Hefty 3273e51060f0SSean Hefty static int cma_get_port(struct rdma_id_private *id_priv) 3274e51060f0SSean Hefty { 32752253fc0cSSteve Wise enum rdma_ucm_port_space ps; 3276e51060f0SSean Hefty int ret; 3277e51060f0SSean Hefty 3278f4753834SSean Hefty if (cma_family(id_priv) != AF_IB) 327958afdcb7SSean Hefty ps = cma_select_inet_ps(id_priv); 328058afdcb7SSean Hefty else 328158afdcb7SSean Hefty ps = cma_select_ib_ps(id_priv); 328258afdcb7SSean Hefty if (!ps) 3283e51060f0SSean Hefty return -EPROTONOSUPPORT; 3284e51060f0SSean Hefty 3285e51060f0SSean Hefty mutex_lock(&lock); 3286f4753834SSean Hefty if (cma_any_port(cma_src_addr(id_priv))) 3287aedec080SSean Hefty ret = cma_alloc_any_port(ps, id_priv); 3288e51060f0SSean Hefty else 3289e51060f0SSean Hefty ret = cma_use_port(ps, id_priv); 3290e51060f0SSean Hefty mutex_unlock(&lock); 3291e51060f0SSean Hefty 3292e51060f0SSean Hefty return ret; 3293e51060f0SSean Hefty } 3294e51060f0SSean Hefty 3295d14714dfSSean Hefty static int cma_check_linklocal(struct rdma_dev_addr *dev_addr, 3296d14714dfSSean Hefty struct sockaddr *addr) 3297d14714dfSSean Hefty { 3298d90f9b35SRoland Dreier #if IS_ENABLED(CONFIG_IPV6) 3299d14714dfSSean Hefty struct sockaddr_in6 *sin6; 3300d14714dfSSean Hefty 3301d14714dfSSean Hefty if (addr->sa_family != AF_INET6) 3302d14714dfSSean Hefty return 0; 3303d14714dfSSean Hefty 3304d14714dfSSean Hefty sin6 = (struct sockaddr_in6 *) addr; 33055462edddSSomnath Kotur 33065462edddSSomnath Kotur if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)) 33075462edddSSomnath Kotur return 0; 33085462edddSSomnath Kotur 33095462edddSSomnath Kotur if (!sin6->sin6_scope_id) 3310d14714dfSSean Hefty return -EINVAL; 3311d14714dfSSean Hefty 3312d14714dfSSean Hefty dev_addr->bound_dev_if = sin6->sin6_scope_id; 3313d14714dfSSean Hefty #endif 3314d14714dfSSean Hefty return 0; 3315d14714dfSSean Hefty } 3316d14714dfSSean Hefty 3317a9bb7912SHefty, Sean int rdma_listen(struct rdma_cm_id *id, int backlog) 3318a9bb7912SHefty, Sean { 3319a9bb7912SHefty, Sean struct rdma_id_private *id_priv; 3320a9bb7912SHefty, Sean int ret; 3321a9bb7912SHefty, Sean 3322a9bb7912SHefty, Sean id_priv = container_of(id, struct rdma_id_private, id); 3323550e5ca7SNir Muchtar if (id_priv->state == RDMA_CM_IDLE) { 3324f4753834SSean Hefty id->route.addr.src_addr.ss_family = AF_INET; 3325f4753834SSean Hefty ret = rdma_bind_addr(id, cma_src_addr(id_priv)); 3326a9bb7912SHefty, Sean if (ret) 3327a9bb7912SHefty, Sean return ret; 3328a9bb7912SHefty, Sean } 3329a9bb7912SHefty, Sean 3330550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) 3331a9bb7912SHefty, Sean return -EINVAL; 3332a9bb7912SHefty, Sean 3333a9bb7912SHefty, Sean if (id_priv->reuseaddr) { 3334a9bb7912SHefty, Sean ret = cma_bind_listen(id_priv); 3335a9bb7912SHefty, Sean if (ret) 3336a9bb7912SHefty, Sean goto err; 3337a9bb7912SHefty, Sean } 3338a9bb7912SHefty, Sean 3339a9bb7912SHefty, Sean id_priv->backlog = backlog; 3340a9bb7912SHefty, Sean if (id->device) { 334172219ceaSMichael Wang if (rdma_cap_ib_cm(id->device, 1)) { 3342a9bb7912SHefty, Sean ret = cma_ib_listen(id_priv); 3343a9bb7912SHefty, Sean if (ret) 3344a9bb7912SHefty, Sean goto err; 334504215330SMichael Wang } else if (rdma_cap_iw_cm(id->device, 1)) { 3346a9bb7912SHefty, Sean ret = cma_iw_listen(id_priv, backlog); 3347a9bb7912SHefty, Sean if (ret) 3348a9bb7912SHefty, Sean goto err; 334921655afcSMichael Wang } else { 3350a9bb7912SHefty, Sean ret = -ENOSYS; 3351a9bb7912SHefty, Sean goto err; 3352a9bb7912SHefty, Sean } 3353a9bb7912SHefty, Sean } else 3354a9bb7912SHefty, Sean cma_listen_on_all(id_priv); 3355a9bb7912SHefty, Sean 3356a9bb7912SHefty, Sean return 0; 3357a9bb7912SHefty, Sean err: 3358a9bb7912SHefty, Sean id_priv->backlog = 0; 3359550e5ca7SNir Muchtar cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); 3360a9bb7912SHefty, Sean return ret; 3361a9bb7912SHefty, Sean } 3362a9bb7912SHefty, Sean EXPORT_SYMBOL(rdma_listen); 3363a9bb7912SHefty, Sean 3364e51060f0SSean Hefty int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) 3365e51060f0SSean Hefty { 3366e51060f0SSean Hefty struct rdma_id_private *id_priv; 3367e51060f0SSean Hefty int ret; 33686df6b4a9SMoni Shoua struct sockaddr *daddr; 3369e51060f0SSean Hefty 3370680f920aSSean Hefty if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 && 3371680f920aSSean Hefty addr->sa_family != AF_IB) 3372e51060f0SSean Hefty return -EAFNOSUPPORT; 3373e51060f0SSean Hefty 3374e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 3375550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND)) 3376e51060f0SSean Hefty return -EINVAL; 3377e51060f0SSean Hefty 3378d14714dfSSean Hefty ret = cma_check_linklocal(&id->route.addr.dev_addr, addr); 3379d14714dfSSean Hefty if (ret) 3380d14714dfSSean Hefty goto err1; 3381d14714dfSSean Hefty 33827b85627bSMoni Shoua memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr)); 33838523c048SSean Hefty if (!cma_any_addr(addr)) { 3384680f920aSSean Hefty ret = cma_translate_addr(addr, &id->route.addr.dev_addr); 3385255d0c14SKrishna Kumar if (ret) 3386255d0c14SKrishna Kumar goto err1; 3387255d0c14SKrishna Kumar 3388be9130ccSDoug Ledford ret = cma_acquire_dev(id_priv, NULL); 3389e51060f0SSean Hefty if (ret) 3390255d0c14SKrishna Kumar goto err1; 3391e51060f0SSean Hefty } 3392e51060f0SSean Hefty 339368602120SSean Hefty if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) { 33945b0ec991SSean Hefty if (addr->sa_family == AF_INET) 33955b0ec991SSean Hefty id_priv->afonly = 1; 33965b0ec991SSean Hefty #if IS_ENABLED(CONFIG_IPV6) 3397fa20105eSGuy Shapiro else if (addr->sa_family == AF_INET6) { 3398fa20105eSGuy Shapiro struct net *net = id_priv->id.route.addr.dev_addr.net; 3399fa20105eSGuy Shapiro 3400fa20105eSGuy Shapiro id_priv->afonly = net->ipv6.sysctl.bindv6only; 3401fa20105eSGuy Shapiro } 34025b0ec991SSean Hefty #endif 340368602120SSean Hefty } 34049dea9a2fSTatyana Nikolova daddr = cma_dst_addr(id_priv); 34059dea9a2fSTatyana Nikolova daddr->sa_family = addr->sa_family; 34069dea9a2fSTatyana Nikolova 3407e51060f0SSean Hefty ret = cma_get_port(id_priv); 3408e51060f0SSean Hefty if (ret) 3409255d0c14SKrishna Kumar goto err2; 3410e51060f0SSean Hefty 3411e51060f0SSean Hefty return 0; 3412255d0c14SKrishna Kumar err2: 341300313983SSteve Wise if (id_priv->cma_dev) { 341400313983SSteve Wise rdma_restrack_del(&id_priv->res); 3415a396d43aSSean Hefty cma_release_dev(id_priv); 341600313983SSteve Wise } 3417255d0c14SKrishna Kumar err1: 3418550e5ca7SNir Muchtar cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE); 3419e51060f0SSean Hefty return ret; 3420e51060f0SSean Hefty } 3421e51060f0SSean Hefty EXPORT_SYMBOL(rdma_bind_addr); 3422e51060f0SSean Hefty 3423f4753834SSean Hefty static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) 3424e51060f0SSean Hefty { 3425e51060f0SSean Hefty struct cma_hdr *cma_hdr; 3426e51060f0SSean Hefty 342701602f11SSean Hefty cma_hdr = hdr; 342801602f11SSean Hefty cma_hdr->cma_version = CMA_VERSION; 3429f4753834SSean Hefty if (cma_family(id_priv) == AF_INET) { 34301f5175adSAleksey Senin struct sockaddr_in *src4, *dst4; 34311f5175adSAleksey Senin 3432f4753834SSean Hefty src4 = (struct sockaddr_in *) cma_src_addr(id_priv); 3433f4753834SSean Hefty dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); 3434e51060f0SSean Hefty 3435e51060f0SSean Hefty cma_set_ip_ver(cma_hdr, 4); 3436e51060f0SSean Hefty cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; 3437e51060f0SSean Hefty cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; 3438e51060f0SSean Hefty cma_hdr->port = src4->sin_port; 3439e8160e15SSean Hefty } else if (cma_family(id_priv) == AF_INET6) { 34401f5175adSAleksey Senin struct sockaddr_in6 *src6, *dst6; 34411f5175adSAleksey Senin 3442f4753834SSean Hefty src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); 3443f4753834SSean Hefty dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); 34441f5175adSAleksey Senin 34451f5175adSAleksey Senin cma_set_ip_ver(cma_hdr, 6); 34461f5175adSAleksey Senin cma_hdr->src_addr.ip6 = src6->sin6_addr; 34471f5175adSAleksey Senin cma_hdr->dst_addr.ip6 = dst6->sin6_addr; 34481f5175adSAleksey Senin cma_hdr->port = src6->sin6_port; 34491f5175adSAleksey Senin } 3450e51060f0SSean Hefty return 0; 3451e51060f0SSean Hefty } 3452e51060f0SSean Hefty 3453628e5f6dSSean Hefty static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, 3454628e5f6dSSean Hefty struct ib_cm_event *ib_event) 3455628e5f6dSSean Hefty { 3456628e5f6dSSean Hefty struct rdma_id_private *id_priv = cm_id->context; 3457628e5f6dSSean Hefty struct rdma_cm_event event; 3458628e5f6dSSean Hefty struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd; 3459628e5f6dSSean Hefty int ret = 0; 3460628e5f6dSSean Hefty 346137e07cdaSBart Van Assche mutex_lock(&id_priv->handler_mutex); 346237e07cdaSBart Van Assche if (id_priv->state != RDMA_CM_CONNECT) 346337e07cdaSBart Van Assche goto out; 3464628e5f6dSSean Hefty 34658aa08602SSean Hefty memset(&event, 0, sizeof event); 3466628e5f6dSSean Hefty switch (ib_event->event) { 3467628e5f6dSSean Hefty case IB_CM_SIDR_REQ_ERROR: 3468628e5f6dSSean Hefty event.event = RDMA_CM_EVENT_UNREACHABLE; 3469628e5f6dSSean Hefty event.status = -ETIMEDOUT; 3470628e5f6dSSean Hefty break; 3471628e5f6dSSean Hefty case IB_CM_SIDR_REP_RECEIVED: 3472628e5f6dSSean Hefty event.param.ud.private_data = ib_event->private_data; 3473628e5f6dSSean Hefty event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE; 3474628e5f6dSSean Hefty if (rep->status != IB_SIDR_SUCCESS) { 3475628e5f6dSSean Hefty event.event = RDMA_CM_EVENT_UNREACHABLE; 3476628e5f6dSSean Hefty event.status = ib_event->param.sidr_rep_rcvd.status; 3477498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n", 3478498683c6SMoni Shoua event.status); 3479628e5f6dSSean Hefty break; 3480628e5f6dSSean Hefty } 34815c438135SSean Hefty ret = cma_set_qkey(id_priv, rep->qkey); 3482d2ca39f2SYossi Etigin if (ret) { 3483498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret); 3484d2ca39f2SYossi Etigin event.event = RDMA_CM_EVENT_ADDR_ERROR; 34855c438135SSean Hefty event.status = ret; 3486628e5f6dSSean Hefty break; 3487628e5f6dSSean Hefty } 34884ad6a024SParav Pandit ib_init_ah_attr_from_path(id_priv->id.device, 34894ad6a024SParav Pandit id_priv->id.port_num, 3490628e5f6dSSean Hefty id_priv->id.route.path_rec, 3491628e5f6dSSean Hefty &event.param.ud.ah_attr); 3492628e5f6dSSean Hefty event.param.ud.qp_num = rep->qpn; 3493628e5f6dSSean Hefty event.param.ud.qkey = rep->qkey; 3494628e5f6dSSean Hefty event.event = RDMA_CM_EVENT_ESTABLISHED; 3495628e5f6dSSean Hefty event.status = 0; 3496628e5f6dSSean Hefty break; 3497628e5f6dSSean Hefty default: 3498aba25a3eSParav Pandit pr_err("RDMA CMA: unexpected IB CM event: %d\n", 3499628e5f6dSSean Hefty ib_event->event); 3500628e5f6dSSean Hefty goto out; 3501628e5f6dSSean Hefty } 3502628e5f6dSSean Hefty 3503628e5f6dSSean Hefty ret = id_priv->id.event_handler(&id_priv->id, &event); 3504628e5f6dSSean Hefty if (ret) { 3505628e5f6dSSean Hefty /* Destroy the CM ID by returning a non-zero value. */ 3506628e5f6dSSean Hefty id_priv->cm_id.ib = NULL; 3507550e5ca7SNir Muchtar cma_exch(id_priv, RDMA_CM_DESTROYING); 3508de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 3509628e5f6dSSean Hefty rdma_destroy_id(&id_priv->id); 3510628e5f6dSSean Hefty return ret; 3511628e5f6dSSean Hefty } 3512628e5f6dSSean Hefty out: 3513de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 3514628e5f6dSSean Hefty return ret; 3515628e5f6dSSean Hefty } 3516628e5f6dSSean Hefty 3517628e5f6dSSean Hefty static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 3518628e5f6dSSean Hefty struct rdma_conn_param *conn_param) 3519628e5f6dSSean Hefty { 3520628e5f6dSSean Hefty struct ib_cm_sidr_req_param req; 35210c9361fcSJack Morgenstein struct ib_cm_id *id; 3522e511d1aeSSean Hefty void *private_data; 3523c0b64f58SBart Van Assche u8 offset; 3524c0b64f58SBart Van Assche int ret; 3525628e5f6dSSean Hefty 3526e511d1aeSSean Hefty memset(&req, 0, sizeof req); 3527e8160e15SSean Hefty offset = cma_user_data_offset(id_priv); 3528e8160e15SSean Hefty req.private_data_len = offset + conn_param->private_data_len; 352904ded167SSean Hefty if (req.private_data_len < conn_param->private_data_len) 353004ded167SSean Hefty return -EINVAL; 353104ded167SSean Hefty 3532e8160e15SSean Hefty if (req.private_data_len) { 3533e511d1aeSSean Hefty private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3534e511d1aeSSean Hefty if (!private_data) 3535628e5f6dSSean Hefty return -ENOMEM; 3536e8160e15SSean Hefty } else { 3537e511d1aeSSean Hefty private_data = NULL; 3538e8160e15SSean Hefty } 3539628e5f6dSSean Hefty 3540628e5f6dSSean Hefty if (conn_param->private_data && conn_param->private_data_len) 3541e511d1aeSSean Hefty memcpy(private_data + offset, conn_param->private_data, 3542e511d1aeSSean Hefty conn_param->private_data_len); 3543628e5f6dSSean Hefty 3544e511d1aeSSean Hefty if (private_data) { 3545e511d1aeSSean Hefty ret = cma_format_hdr(private_data, id_priv); 3546628e5f6dSSean Hefty if (ret) 3547628e5f6dSSean Hefty goto out; 3548e511d1aeSSean Hefty req.private_data = private_data; 3549e8160e15SSean Hefty } 3550628e5f6dSSean Hefty 35510c9361fcSJack Morgenstein id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, 35520c9361fcSJack Morgenstein id_priv); 35530c9361fcSJack Morgenstein if (IS_ERR(id)) { 35540c9361fcSJack Morgenstein ret = PTR_ERR(id); 3555628e5f6dSSean Hefty goto out; 3556628e5f6dSSean Hefty } 35570c9361fcSJack Morgenstein id_priv->cm_id.ib = id; 3558628e5f6dSSean Hefty 3559f4753834SSean Hefty req.path = id_priv->id.route.path_rec; 3560cf53936fSSean Hefty req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3561628e5f6dSSean Hefty req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8); 3562628e5f6dSSean Hefty req.max_cm_retries = CMA_MAX_CM_RETRIES; 3563628e5f6dSSean Hefty 3564628e5f6dSSean Hefty ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req); 3565628e5f6dSSean Hefty if (ret) { 3566628e5f6dSSean Hefty ib_destroy_cm_id(id_priv->cm_id.ib); 3567628e5f6dSSean Hefty id_priv->cm_id.ib = NULL; 3568628e5f6dSSean Hefty } 3569628e5f6dSSean Hefty out: 3570e511d1aeSSean Hefty kfree(private_data); 3571628e5f6dSSean Hefty return ret; 3572628e5f6dSSean Hefty } 3573628e5f6dSSean Hefty 3574e51060f0SSean Hefty static int cma_connect_ib(struct rdma_id_private *id_priv, 3575e51060f0SSean Hefty struct rdma_conn_param *conn_param) 3576e51060f0SSean Hefty { 3577e51060f0SSean Hefty struct ib_cm_req_param req; 3578e51060f0SSean Hefty struct rdma_route *route; 3579e51060f0SSean Hefty void *private_data; 35800c9361fcSJack Morgenstein struct ib_cm_id *id; 3581c0b64f58SBart Van Assche u8 offset; 3582c0b64f58SBart Van Assche int ret; 3583e51060f0SSean Hefty 3584e51060f0SSean Hefty memset(&req, 0, sizeof req); 3585e8160e15SSean Hefty offset = cma_user_data_offset(id_priv); 3586e51060f0SSean Hefty req.private_data_len = offset + conn_param->private_data_len; 358704ded167SSean Hefty if (req.private_data_len < conn_param->private_data_len) 358804ded167SSean Hefty return -EINVAL; 358904ded167SSean Hefty 3590e8160e15SSean Hefty if (req.private_data_len) { 3591e51060f0SSean Hefty private_data = kzalloc(req.private_data_len, GFP_ATOMIC); 3592e51060f0SSean Hefty if (!private_data) 3593e51060f0SSean Hefty return -ENOMEM; 3594e8160e15SSean Hefty } else { 3595e8160e15SSean Hefty private_data = NULL; 3596e8160e15SSean Hefty } 3597e51060f0SSean Hefty 3598e51060f0SSean Hefty if (conn_param->private_data && conn_param->private_data_len) 3599e51060f0SSean Hefty memcpy(private_data + offset, conn_param->private_data, 3600e51060f0SSean Hefty conn_param->private_data_len); 3601e51060f0SSean Hefty 36020c9361fcSJack Morgenstein id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); 36030c9361fcSJack Morgenstein if (IS_ERR(id)) { 36040c9361fcSJack Morgenstein ret = PTR_ERR(id); 3605e51060f0SSean Hefty goto out; 3606e51060f0SSean Hefty } 36070c9361fcSJack Morgenstein id_priv->cm_id.ib = id; 3608e51060f0SSean Hefty 3609e51060f0SSean Hefty route = &id_priv->id.route; 3610e8160e15SSean Hefty if (private_data) { 3611f4753834SSean Hefty ret = cma_format_hdr(private_data, id_priv); 3612e51060f0SSean Hefty if (ret) 3613e51060f0SSean Hefty goto out; 3614e51060f0SSean Hefty req.private_data = private_data; 3615e8160e15SSean Hefty } 3616e51060f0SSean Hefty 3617e51060f0SSean Hefty req.primary_path = &route->path_rec[0]; 3618e51060f0SSean Hefty if (route->num_paths == 2) 3619e51060f0SSean Hefty req.alternate_path = &route->path_rec[1]; 3620e51060f0SSean Hefty 3621cf53936fSSean Hefty req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv)); 3622e51060f0SSean Hefty req.qp_num = id_priv->qp_num; 362318c441a6SSean Hefty req.qp_type = id_priv->id.qp_type; 3624e51060f0SSean Hefty req.starting_psn = id_priv->seq_num; 3625e51060f0SSean Hefty req.responder_resources = conn_param->responder_resources; 3626e51060f0SSean Hefty req.initiator_depth = conn_param->initiator_depth; 3627e51060f0SSean Hefty req.flow_control = conn_param->flow_control; 36284ede178aSSean Hefty req.retry_count = min_t(u8, 7, conn_param->retry_count); 36294ede178aSSean Hefty req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3630e51060f0SSean Hefty req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3631e51060f0SSean Hefty req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT; 3632e51060f0SSean Hefty req.max_cm_retries = CMA_MAX_CM_RETRIES; 3633e51060f0SSean Hefty req.srq = id_priv->srq ? 1 : 0; 3634e51060f0SSean Hefty 3635e51060f0SSean Hefty ret = ib_send_cm_req(id_priv->cm_id.ib, &req); 3636e51060f0SSean Hefty out: 36370c9361fcSJack Morgenstein if (ret && !IS_ERR(id)) { 36380c9361fcSJack Morgenstein ib_destroy_cm_id(id); 3639675a027cSKrishna Kumar id_priv->cm_id.ib = NULL; 3640675a027cSKrishna Kumar } 3641675a027cSKrishna Kumar 3642e51060f0SSean Hefty kfree(private_data); 3643e51060f0SSean Hefty return ret; 3644e51060f0SSean Hefty } 3645e51060f0SSean Hefty 364607ebafbaSTom Tucker static int cma_connect_iw(struct rdma_id_private *id_priv, 364707ebafbaSTom Tucker struct rdma_conn_param *conn_param) 364807ebafbaSTom Tucker { 364907ebafbaSTom Tucker struct iw_cm_id *cm_id; 365007ebafbaSTom Tucker int ret; 365107ebafbaSTom Tucker struct iw_cm_conn_param iw_param; 365207ebafbaSTom Tucker 365307ebafbaSTom Tucker cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv); 36540c9361fcSJack Morgenstein if (IS_ERR(cm_id)) 36550c9361fcSJack Morgenstein return PTR_ERR(cm_id); 365607ebafbaSTom Tucker 365768cdba06SSteve Wise cm_id->tos = id_priv->tos; 365807ebafbaSTom Tucker id_priv->cm_id.iw = cm_id; 365907ebafbaSTom Tucker 366024d44a39SSteve Wise memcpy(&cm_id->local_addr, cma_src_addr(id_priv), 366124d44a39SSteve Wise rdma_addr_size(cma_src_addr(id_priv))); 366224d44a39SSteve Wise memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv), 366324d44a39SSteve Wise rdma_addr_size(cma_dst_addr(id_priv))); 366407ebafbaSTom Tucker 36655851bb89SSean Hefty ret = cma_modify_qp_rtr(id_priv, conn_param); 3666675a027cSKrishna Kumar if (ret) 3667675a027cSKrishna Kumar goto out; 366807ebafbaSTom Tucker 3669f45ee80eSHefty, Sean if (conn_param) { 367007ebafbaSTom Tucker iw_param.ord = conn_param->initiator_depth; 367107ebafbaSTom Tucker iw_param.ird = conn_param->responder_resources; 367207ebafbaSTom Tucker iw_param.private_data = conn_param->private_data; 367307ebafbaSTom Tucker iw_param.private_data_len = conn_param->private_data_len; 3674f45ee80eSHefty, Sean iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num; 3675f45ee80eSHefty, Sean } else { 3676f45ee80eSHefty, Sean memset(&iw_param, 0, sizeof iw_param); 367707ebafbaSTom Tucker iw_param.qpn = id_priv->qp_num; 3678f45ee80eSHefty, Sean } 367907ebafbaSTom Tucker ret = iw_cm_connect(cm_id, &iw_param); 368007ebafbaSTom Tucker out: 36810c9361fcSJack Morgenstein if (ret) { 3682675a027cSKrishna Kumar iw_destroy_cm_id(cm_id); 3683675a027cSKrishna Kumar id_priv->cm_id.iw = NULL; 3684675a027cSKrishna Kumar } 368507ebafbaSTom Tucker return ret; 368607ebafbaSTom Tucker } 368707ebafbaSTom Tucker 3688e51060f0SSean Hefty int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param) 3689e51060f0SSean Hefty { 3690e51060f0SSean Hefty struct rdma_id_private *id_priv; 3691e51060f0SSean Hefty int ret; 3692e51060f0SSean Hefty 3693e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 3694550e5ca7SNir Muchtar if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT)) 3695e51060f0SSean Hefty return -EINVAL; 3696e51060f0SSean Hefty 3697e51060f0SSean Hefty if (!id->qp) { 3698e51060f0SSean Hefty id_priv->qp_num = conn_param->qp_num; 3699e51060f0SSean Hefty id_priv->srq = conn_param->srq; 3700e51060f0SSean Hefty } 3701e51060f0SSean Hefty 370272219ceaSMichael Wang if (rdma_cap_ib_cm(id->device, id->port_num)) { 3703b26f9b99SSean Hefty if (id->qp_type == IB_QPT_UD) 3704628e5f6dSSean Hefty ret = cma_resolve_ib_udp(id_priv, conn_param); 3705628e5f6dSSean Hefty else 3706e51060f0SSean Hefty ret = cma_connect_ib(id_priv, conn_param); 370704215330SMichael Wang } else if (rdma_cap_iw_cm(id->device, id->port_num)) 370807ebafbaSTom Tucker ret = cma_connect_iw(id_priv, conn_param); 370921655afcSMichael Wang else 3710e51060f0SSean Hefty ret = -ENOSYS; 3711e51060f0SSean Hefty if (ret) 3712e51060f0SSean Hefty goto err; 3713e51060f0SSean Hefty 3714e51060f0SSean Hefty return 0; 3715e51060f0SSean Hefty err: 3716550e5ca7SNir Muchtar cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED); 3717e51060f0SSean Hefty return ret; 3718e51060f0SSean Hefty } 3719e51060f0SSean Hefty EXPORT_SYMBOL(rdma_connect); 3720e51060f0SSean Hefty 3721e51060f0SSean Hefty static int cma_accept_ib(struct rdma_id_private *id_priv, 3722e51060f0SSean Hefty struct rdma_conn_param *conn_param) 3723e51060f0SSean Hefty { 3724e51060f0SSean Hefty struct ib_cm_rep_param rep; 37255851bb89SSean Hefty int ret; 3726e51060f0SSean Hefty 37275851bb89SSean Hefty ret = cma_modify_qp_rtr(id_priv, conn_param); 3728e51060f0SSean Hefty if (ret) 37290fe313b0SSean Hefty goto out; 37300fe313b0SSean Hefty 37315851bb89SSean Hefty ret = cma_modify_qp_rts(id_priv, conn_param); 37320fe313b0SSean Hefty if (ret) 37330fe313b0SSean Hefty goto out; 37340fe313b0SSean Hefty 3735e51060f0SSean Hefty memset(&rep, 0, sizeof rep); 3736e51060f0SSean Hefty rep.qp_num = id_priv->qp_num; 3737e51060f0SSean Hefty rep.starting_psn = id_priv->seq_num; 3738e51060f0SSean Hefty rep.private_data = conn_param->private_data; 3739e51060f0SSean Hefty rep.private_data_len = conn_param->private_data_len; 3740e51060f0SSean Hefty rep.responder_resources = conn_param->responder_resources; 3741e51060f0SSean Hefty rep.initiator_depth = conn_param->initiator_depth; 3742e51060f0SSean Hefty rep.failover_accepted = 0; 3743e51060f0SSean Hefty rep.flow_control = conn_param->flow_control; 37444ede178aSSean Hefty rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count); 3745e51060f0SSean Hefty rep.srq = id_priv->srq ? 1 : 0; 3746e51060f0SSean Hefty 37470fe313b0SSean Hefty ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep); 37480fe313b0SSean Hefty out: 37490fe313b0SSean Hefty return ret; 3750e51060f0SSean Hefty } 3751e51060f0SSean Hefty 375207ebafbaSTom Tucker static int cma_accept_iw(struct rdma_id_private *id_priv, 375307ebafbaSTom Tucker struct rdma_conn_param *conn_param) 375407ebafbaSTom Tucker { 375507ebafbaSTom Tucker struct iw_cm_conn_param iw_param; 375607ebafbaSTom Tucker int ret; 375707ebafbaSTom Tucker 3758f2625f7dSSteve Wise if (!conn_param) 3759f2625f7dSSteve Wise return -EINVAL; 3760f2625f7dSSteve Wise 37615851bb89SSean Hefty ret = cma_modify_qp_rtr(id_priv, conn_param); 376207ebafbaSTom Tucker if (ret) 376307ebafbaSTom Tucker return ret; 376407ebafbaSTom Tucker 376507ebafbaSTom Tucker iw_param.ord = conn_param->initiator_depth; 376607ebafbaSTom Tucker iw_param.ird = conn_param->responder_resources; 376707ebafbaSTom Tucker iw_param.private_data = conn_param->private_data; 376807ebafbaSTom Tucker iw_param.private_data_len = conn_param->private_data_len; 376907ebafbaSTom Tucker if (id_priv->id.qp) { 377007ebafbaSTom Tucker iw_param.qpn = id_priv->qp_num; 377107ebafbaSTom Tucker } else 377207ebafbaSTom Tucker iw_param.qpn = conn_param->qp_num; 377307ebafbaSTom Tucker 377407ebafbaSTom Tucker return iw_cm_accept(id_priv->cm_id.iw, &iw_param); 377507ebafbaSTom Tucker } 377607ebafbaSTom Tucker 3777628e5f6dSSean Hefty static int cma_send_sidr_rep(struct rdma_id_private *id_priv, 37785c438135SSean Hefty enum ib_cm_sidr_status status, u32 qkey, 3779628e5f6dSSean Hefty const void *private_data, int private_data_len) 3780628e5f6dSSean Hefty { 3781628e5f6dSSean Hefty struct ib_cm_sidr_rep_param rep; 3782d2ca39f2SYossi Etigin int ret; 3783628e5f6dSSean Hefty 3784628e5f6dSSean Hefty memset(&rep, 0, sizeof rep); 3785628e5f6dSSean Hefty rep.status = status; 3786628e5f6dSSean Hefty if (status == IB_SIDR_SUCCESS) { 37875c438135SSean Hefty ret = cma_set_qkey(id_priv, qkey); 3788d2ca39f2SYossi Etigin if (ret) 3789d2ca39f2SYossi Etigin return ret; 3790628e5f6dSSean Hefty rep.qp_num = id_priv->qp_num; 3791c8f6a362SSean Hefty rep.qkey = id_priv->qkey; 3792628e5f6dSSean Hefty } 3793628e5f6dSSean Hefty rep.private_data = private_data; 3794628e5f6dSSean Hefty rep.private_data_len = private_data_len; 3795628e5f6dSSean Hefty 3796628e5f6dSSean Hefty return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep); 3797628e5f6dSSean Hefty } 3798628e5f6dSSean Hefty 379900313983SSteve Wise int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param, 380000313983SSteve Wise const char *caller) 3801e51060f0SSean Hefty { 3802e51060f0SSean Hefty struct rdma_id_private *id_priv; 3803e51060f0SSean Hefty int ret; 3804e51060f0SSean Hefty 3805e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 380683e9502dSNir Muchtar 380700313983SSteve Wise if (caller) 380800313983SSteve Wise id_priv->res.kern_name = caller; 380900313983SSteve Wise else 381000313983SSteve Wise rdma_restrack_set_task(&id_priv->res, current); 381183e9502dSNir Muchtar 3812550e5ca7SNir Muchtar if (!cma_comp(id_priv, RDMA_CM_CONNECT)) 3813e51060f0SSean Hefty return -EINVAL; 3814e51060f0SSean Hefty 3815e51060f0SSean Hefty if (!id->qp && conn_param) { 3816e51060f0SSean Hefty id_priv->qp_num = conn_param->qp_num; 3817e51060f0SSean Hefty id_priv->srq = conn_param->srq; 3818e51060f0SSean Hefty } 3819e51060f0SSean Hefty 382072219ceaSMichael Wang if (rdma_cap_ib_cm(id->device, id->port_num)) { 3821f45ee80eSHefty, Sean if (id->qp_type == IB_QPT_UD) { 3822f45ee80eSHefty, Sean if (conn_param) 3823628e5f6dSSean Hefty ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 38245c438135SSean Hefty conn_param->qkey, 3825628e5f6dSSean Hefty conn_param->private_data, 3826628e5f6dSSean Hefty conn_param->private_data_len); 3827f45ee80eSHefty, Sean else 3828f45ee80eSHefty, Sean ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, 38295c438135SSean Hefty 0, NULL, 0); 3830f45ee80eSHefty, Sean } else { 3831f45ee80eSHefty, Sean if (conn_param) 3832e51060f0SSean Hefty ret = cma_accept_ib(id_priv, conn_param); 3833e51060f0SSean Hefty else 3834e51060f0SSean Hefty ret = cma_rep_recv(id_priv); 3835f45ee80eSHefty, Sean } 383604215330SMichael Wang } else if (rdma_cap_iw_cm(id->device, id->port_num)) 383707ebafbaSTom Tucker ret = cma_accept_iw(id_priv, conn_param); 383821655afcSMichael Wang else 3839e51060f0SSean Hefty ret = -ENOSYS; 3840e51060f0SSean Hefty 3841e51060f0SSean Hefty if (ret) 3842e51060f0SSean Hefty goto reject; 3843e51060f0SSean Hefty 3844e51060f0SSean Hefty return 0; 3845e51060f0SSean Hefty reject: 3846c5483388SSean Hefty cma_modify_qp_err(id_priv); 3847e51060f0SSean Hefty rdma_reject(id, NULL, 0); 3848e51060f0SSean Hefty return ret; 3849e51060f0SSean Hefty } 385000313983SSteve Wise EXPORT_SYMBOL(__rdma_accept); 3851e51060f0SSean Hefty 38520fe313b0SSean Hefty int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event) 38530fe313b0SSean Hefty { 38540fe313b0SSean Hefty struct rdma_id_private *id_priv; 38550fe313b0SSean Hefty int ret; 38560fe313b0SSean Hefty 38570fe313b0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 38580c9361fcSJack Morgenstein if (!id_priv->cm_id.ib) 38590fe313b0SSean Hefty return -EINVAL; 38600fe313b0SSean Hefty 38610fe313b0SSean Hefty switch (id->device->node_type) { 38620fe313b0SSean Hefty case RDMA_NODE_IB_CA: 38630fe313b0SSean Hefty ret = ib_cm_notify(id_priv->cm_id.ib, event); 38640fe313b0SSean Hefty break; 38650fe313b0SSean Hefty default: 38660fe313b0SSean Hefty ret = 0; 38670fe313b0SSean Hefty break; 38680fe313b0SSean Hefty } 38690fe313b0SSean Hefty return ret; 38700fe313b0SSean Hefty } 38710fe313b0SSean Hefty EXPORT_SYMBOL(rdma_notify); 38720fe313b0SSean Hefty 3873e51060f0SSean Hefty int rdma_reject(struct rdma_cm_id *id, const void *private_data, 3874e51060f0SSean Hefty u8 private_data_len) 3875e51060f0SSean Hefty { 3876e51060f0SSean Hefty struct rdma_id_private *id_priv; 3877e51060f0SSean Hefty int ret; 3878e51060f0SSean Hefty 3879e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 38800c9361fcSJack Morgenstein if (!id_priv->cm_id.ib) 3881e51060f0SSean Hefty return -EINVAL; 3882e51060f0SSean Hefty 388372219ceaSMichael Wang if (rdma_cap_ib_cm(id->device, id->port_num)) { 3884b26f9b99SSean Hefty if (id->qp_type == IB_QPT_UD) 38855c438135SSean Hefty ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0, 3886e51060f0SSean Hefty private_data, private_data_len); 3887628e5f6dSSean Hefty else 3888628e5f6dSSean Hefty ret = ib_send_cm_rej(id_priv->cm_id.ib, 3889628e5f6dSSean Hefty IB_CM_REJ_CONSUMER_DEFINED, NULL, 3890628e5f6dSSean Hefty 0, private_data, private_data_len); 389104215330SMichael Wang } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 389207ebafbaSTom Tucker ret = iw_cm_reject(id_priv->cm_id.iw, 389307ebafbaSTom Tucker private_data, private_data_len); 389421655afcSMichael Wang } else 3895e51060f0SSean Hefty ret = -ENOSYS; 389621655afcSMichael Wang 3897e51060f0SSean Hefty return ret; 3898e51060f0SSean Hefty } 3899e51060f0SSean Hefty EXPORT_SYMBOL(rdma_reject); 3900e51060f0SSean Hefty 3901e51060f0SSean Hefty int rdma_disconnect(struct rdma_cm_id *id) 3902e51060f0SSean Hefty { 3903e51060f0SSean Hefty struct rdma_id_private *id_priv; 3904e51060f0SSean Hefty int ret; 3905e51060f0SSean Hefty 3906e51060f0SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 39070c9361fcSJack Morgenstein if (!id_priv->cm_id.ib) 3908e51060f0SSean Hefty return -EINVAL; 3909e51060f0SSean Hefty 391072219ceaSMichael Wang if (rdma_cap_ib_cm(id->device, id->port_num)) { 3911c5483388SSean Hefty ret = cma_modify_qp_err(id_priv); 3912e51060f0SSean Hefty if (ret) 3913e51060f0SSean Hefty goto out; 3914e51060f0SSean Hefty /* Initiate or respond to a disconnect. */ 3915e51060f0SSean Hefty if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) 3916e51060f0SSean Hefty ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0); 391704215330SMichael Wang } else if (rdma_cap_iw_cm(id->device, id->port_num)) { 391807ebafbaSTom Tucker ret = iw_cm_disconnect(id_priv->cm_id.iw, 0); 391921655afcSMichael Wang } else 392007ebafbaSTom Tucker ret = -EINVAL; 392121655afcSMichael Wang 3922e51060f0SSean Hefty out: 3923e51060f0SSean Hefty return ret; 3924e51060f0SSean Hefty } 3925e51060f0SSean Hefty EXPORT_SYMBOL(rdma_disconnect); 3926e51060f0SSean Hefty 3927c8f6a362SSean Hefty static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) 3928c8f6a362SSean Hefty { 3929c8f6a362SSean Hefty struct rdma_id_private *id_priv; 3930c8f6a362SSean Hefty struct cma_multicast *mc = multicast->context; 3931c8f6a362SSean Hefty struct rdma_cm_event event; 393237e07cdaSBart Van Assche int ret = 0; 3933c8f6a362SSean Hefty 3934c8f6a362SSean Hefty id_priv = mc->id_priv; 393537e07cdaSBart Van Assche mutex_lock(&id_priv->handler_mutex); 393637e07cdaSBart Van Assche if (id_priv->state != RDMA_CM_ADDR_BOUND && 393737e07cdaSBart Van Assche id_priv->state != RDMA_CM_ADDR_RESOLVED) 393837e07cdaSBart Van Assche goto out; 3939c8f6a362SSean Hefty 39405c438135SSean Hefty if (!status) 39415c438135SSean Hefty status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey)); 3942498683c6SMoni Shoua else 3943498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n", 3944498683c6SMoni Shoua status); 3945c5483388SSean Hefty mutex_lock(&id_priv->qp_mutex); 3946498683c6SMoni Shoua if (!status && id_priv->id.qp) { 3947c8f6a362SSean Hefty status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, 394846ea5061SSean Hefty be16_to_cpu(multicast->rec.mlid)); 3949a3dd3a48SChristophe Jaillet if (status) 3950498683c6SMoni Shoua pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n", 3951498683c6SMoni Shoua status); 3952498683c6SMoni Shoua } 3953c5483388SSean Hefty mutex_unlock(&id_priv->qp_mutex); 3954c8f6a362SSean Hefty 3955c8f6a362SSean Hefty memset(&event, 0, sizeof event); 3956c8f6a362SSean Hefty event.status = status; 3957c8f6a362SSean Hefty event.param.ud.private_data = mc->context; 3958c8f6a362SSean Hefty if (!status) { 3959bee3c3c9SMoni Shoua struct rdma_dev_addr *dev_addr = 3960bee3c3c9SMoni Shoua &id_priv->id.route.addr.dev_addr; 3961bee3c3c9SMoni Shoua struct net_device *ndev = 3962052eac6eSParav Pandit dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if); 3963bee3c3c9SMoni Shoua enum ib_gid_type gid_type = 3964bee3c3c9SMoni Shoua id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 3965bee3c3c9SMoni Shoua rdma_start_port(id_priv->cma_dev->device)]; 3966bee3c3c9SMoni Shoua 3967c8f6a362SSean Hefty event.event = RDMA_CM_EVENT_MULTICAST_JOIN; 39686d337179SParav Pandit ret = ib_init_ah_from_mcmember(id_priv->id.device, 39696d337179SParav Pandit id_priv->id.port_num, 39706d337179SParav Pandit &multicast->rec, 3971bee3c3c9SMoni Shoua ndev, gid_type, 3972c8f6a362SSean Hefty &event.param.ud.ah_attr); 39736d337179SParav Pandit if (ret) 39746d337179SParav Pandit event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 39756d337179SParav Pandit 3976c8f6a362SSean Hefty event.param.ud.qp_num = 0xFFFFFF; 3977c8f6a362SSean Hefty event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey); 3978bee3c3c9SMoni Shoua if (ndev) 3979bee3c3c9SMoni Shoua dev_put(ndev); 3980c8f6a362SSean Hefty } else 3981c8f6a362SSean Hefty event.event = RDMA_CM_EVENT_MULTICAST_ERROR; 3982c8f6a362SSean Hefty 3983c8f6a362SSean Hefty ret = id_priv->id.event_handler(&id_priv->id, &event); 3984c8f6a362SSean Hefty if (ret) { 3985550e5ca7SNir Muchtar cma_exch(id_priv, RDMA_CM_DESTROYING); 3986de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 3987c8f6a362SSean Hefty rdma_destroy_id(&id_priv->id); 3988c8f6a362SSean Hefty return 0; 3989c8f6a362SSean Hefty } 39908aa08602SSean Hefty 399137e07cdaSBart Van Assche out: 3992de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 3993c8f6a362SSean Hefty return 0; 3994c8f6a362SSean Hefty } 3995c8f6a362SSean Hefty 3996c8f6a362SSean Hefty static void cma_set_mgid(struct rdma_id_private *id_priv, 3997c8f6a362SSean Hefty struct sockaddr *addr, union ib_gid *mgid) 3998c8f6a362SSean Hefty { 3999c8f6a362SSean Hefty unsigned char mc_map[MAX_ADDR_LEN]; 4000c8f6a362SSean Hefty struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 4001c8f6a362SSean Hefty struct sockaddr_in *sin = (struct sockaddr_in *) addr; 4002c8f6a362SSean Hefty struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr; 4003c8f6a362SSean Hefty 4004c8f6a362SSean Hefty if (cma_any_addr(addr)) { 4005c8f6a362SSean Hefty memset(mgid, 0, sizeof *mgid); 4006c8f6a362SSean Hefty } else if ((addr->sa_family == AF_INET6) && 40071c9b2819SJason Gunthorpe ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) == 4008c8f6a362SSean Hefty 0xFF10A01B)) { 4009c8f6a362SSean Hefty /* IPv6 address is an SA assigned MGID. */ 4010c8f6a362SSean Hefty memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 40115bc2b7b3SSean Hefty } else if (addr->sa_family == AF_IB) { 40125bc2b7b3SSean Hefty memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid); 4013e2e62697SJason Gunthorpe } else if ((addr->sa_family == AF_INET6)) { 4014e2e62697SJason Gunthorpe ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map); 4015e2e62697SJason Gunthorpe if (id_priv->id.ps == RDMA_PS_UDP) 4016e2e62697SJason Gunthorpe mc_map[7] = 0x01; /* Use RDMA CM signature */ 4017e2e62697SJason Gunthorpe *mgid = *(union ib_gid *) (mc_map + 4); 4018c8f6a362SSean Hefty } else { 4019a9e527e3SRolf Manderscheid ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map); 4020c8f6a362SSean Hefty if (id_priv->id.ps == RDMA_PS_UDP) 4021c8f6a362SSean Hefty mc_map[7] = 0x01; /* Use RDMA CM signature */ 4022c8f6a362SSean Hefty *mgid = *(union ib_gid *) (mc_map + 4); 4023c8f6a362SSean Hefty } 4024c8f6a362SSean Hefty } 4025c8f6a362SSean Hefty 4026c8f6a362SSean Hefty static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 4027c8f6a362SSean Hefty struct cma_multicast *mc) 4028c8f6a362SSean Hefty { 4029c8f6a362SSean Hefty struct ib_sa_mcmember_rec rec; 4030c8f6a362SSean Hefty struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 4031c8f6a362SSean Hefty ib_sa_comp_mask comp_mask; 4032c8f6a362SSean Hefty int ret; 4033c8f6a362SSean Hefty 4034c8f6a362SSean Hefty ib_addr_get_mgid(dev_addr, &rec.mgid); 4035c8f6a362SSean Hefty ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num, 4036c8f6a362SSean Hefty &rec.mgid, &rec); 4037c8f6a362SSean Hefty if (ret) 4038c8f6a362SSean Hefty return ret; 4039c8f6a362SSean Hefty 40405bc2b7b3SSean Hefty ret = cma_set_qkey(id_priv, 0); 40415bc2b7b3SSean Hefty if (ret) 40425bc2b7b3SSean Hefty return ret; 40435bc2b7b3SSean Hefty 40443f446754SRoland Dreier cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); 40455bc2b7b3SSean Hefty rec.qkey = cpu_to_be32(id_priv->qkey); 40466f8372b6SSean Hefty rdma_addr_get_sgid(dev_addr, &rec.port_gid); 4047c8f6a362SSean Hefty rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr)); 4048ab15c95aSAlex Vesker rec.join_state = mc->join_state; 4049ab15c95aSAlex Vesker 4050ee1c60b1SDasaratharaman Chandramouli if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) && 4051ee1c60b1SDasaratharaman Chandramouli (!ib_sa_sendonly_fullmem_support(&sa_client, 4052ee1c60b1SDasaratharaman Chandramouli id_priv->id.device, 4053ee1c60b1SDasaratharaman Chandramouli id_priv->id.port_num))) { 4054ab15c95aSAlex Vesker pr_warn("RDMA CM: %s port %u Unable to multicast join\n" 4055ab15c95aSAlex Vesker "RDMA CM: SM doesn't support Send Only Full Member option\n", 4056ab15c95aSAlex Vesker id_priv->id.device->name, id_priv->id.port_num); 4057ab15c95aSAlex Vesker return -EOPNOTSUPP; 4058ab15c95aSAlex Vesker } 4059c8f6a362SSean Hefty 4060c8f6a362SSean Hefty comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID | 4061c8f6a362SSean Hefty IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE | 4062c8f6a362SSean Hefty IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL | 4063c8f6a362SSean Hefty IB_SA_MCMEMBER_REC_FLOW_LABEL | 4064c8f6a362SSean Hefty IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 4065c8f6a362SSean Hefty 406684adeee9SYossi Etigin if (id_priv->id.ps == RDMA_PS_IPOIB) 406784adeee9SYossi Etigin comp_mask |= IB_SA_MCMEMBER_REC_RATE | 40682a22fb8cSDotan Barak IB_SA_MCMEMBER_REC_RATE_SELECTOR | 40692a22fb8cSDotan Barak IB_SA_MCMEMBER_REC_MTU_SELECTOR | 40702a22fb8cSDotan Barak IB_SA_MCMEMBER_REC_MTU | 40712a22fb8cSDotan Barak IB_SA_MCMEMBER_REC_HOP_LIMIT; 407284adeee9SYossi Etigin 4073c8f6a362SSean Hefty mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device, 4074c8f6a362SSean Hefty id_priv->id.port_num, &rec, 4075c8f6a362SSean Hefty comp_mask, GFP_KERNEL, 4076c8f6a362SSean Hefty cma_ib_mc_handler, mc); 40778c6ffba0SRusty Russell return PTR_ERR_OR_ZERO(mc->multicast.ib); 4078c8f6a362SSean Hefty } 4079c8f6a362SSean Hefty 40803c86aa70SEli Cohen static void iboe_mcast_work_handler(struct work_struct *work) 40813c86aa70SEli Cohen { 40823c86aa70SEli Cohen struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work); 40833c86aa70SEli Cohen struct cma_multicast *mc = mw->mc; 40843c86aa70SEli Cohen struct ib_sa_multicast *m = mc->multicast.ib; 40853c86aa70SEli Cohen 40863c86aa70SEli Cohen mc->multicast.ib->context = mc; 40873c86aa70SEli Cohen cma_ib_mc_handler(0, m); 40883c86aa70SEli Cohen kref_put(&mc->mcref, release_mc); 40893c86aa70SEli Cohen kfree(mw); 40903c86aa70SEli Cohen } 40913c86aa70SEli Cohen 4092be1d325aSNoa Osherovich static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid, 4093be1d325aSNoa Osherovich enum ib_gid_type gid_type) 40943c86aa70SEli Cohen { 40953c86aa70SEli Cohen struct sockaddr_in *sin = (struct sockaddr_in *)addr; 40963c86aa70SEli Cohen struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; 40973c86aa70SEli Cohen 40983c86aa70SEli Cohen if (cma_any_addr(addr)) { 40993c86aa70SEli Cohen memset(mgid, 0, sizeof *mgid); 41003c86aa70SEli Cohen } else if (addr->sa_family == AF_INET6) { 41013c86aa70SEli Cohen memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); 41023c86aa70SEli Cohen } else { 41035c181bdaSParav Pandit mgid->raw[0] = 41045c181bdaSParav Pandit (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff; 41055c181bdaSParav Pandit mgid->raw[1] = 41065c181bdaSParav Pandit (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e; 41073c86aa70SEli Cohen mgid->raw[2] = 0; 41083c86aa70SEli Cohen mgid->raw[3] = 0; 41093c86aa70SEli Cohen mgid->raw[4] = 0; 41103c86aa70SEli Cohen mgid->raw[5] = 0; 41113c86aa70SEli Cohen mgid->raw[6] = 0; 41123c86aa70SEli Cohen mgid->raw[7] = 0; 41133c86aa70SEli Cohen mgid->raw[8] = 0; 41143c86aa70SEli Cohen mgid->raw[9] = 0; 41153c86aa70SEli Cohen mgid->raw[10] = 0xff; 41163c86aa70SEli Cohen mgid->raw[11] = 0xff; 41173c86aa70SEli Cohen *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr; 41183c86aa70SEli Cohen } 41193c86aa70SEli Cohen } 41203c86aa70SEli Cohen 41213c86aa70SEli Cohen static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, 41223c86aa70SEli Cohen struct cma_multicast *mc) 41233c86aa70SEli Cohen { 41243c86aa70SEli Cohen struct iboe_mcast_work *work; 41253c86aa70SEli Cohen struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr; 4126bee3c3c9SMoni Shoua int err = 0; 41273c86aa70SEli Cohen struct sockaddr *addr = (struct sockaddr *)&mc->addr; 41283c86aa70SEli Cohen struct net_device *ndev = NULL; 4129bee3c3c9SMoni Shoua enum ib_gid_type gid_type; 4130ab15c95aSAlex Vesker bool send_only; 4131ab15c95aSAlex Vesker 4132ab15c95aSAlex Vesker send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN); 41333c86aa70SEli Cohen 41343c86aa70SEli Cohen if (cma_zero_addr((struct sockaddr *)&mc->addr)) 41353c86aa70SEli Cohen return -EINVAL; 41363c86aa70SEli Cohen 41373c86aa70SEli Cohen work = kzalloc(sizeof *work, GFP_KERNEL); 41383c86aa70SEli Cohen if (!work) 41393c86aa70SEli Cohen return -ENOMEM; 41403c86aa70SEli Cohen 41413c86aa70SEli Cohen mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL); 41423c86aa70SEli Cohen if (!mc->multicast.ib) { 41433c86aa70SEli Cohen err = -ENOMEM; 41443c86aa70SEli Cohen goto out1; 41453c86aa70SEli Cohen } 41463c86aa70SEli Cohen 4147be1d325aSNoa Osherovich gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num - 4148be1d325aSNoa Osherovich rdma_start_port(id_priv->cma_dev->device)]; 4149be1d325aSNoa Osherovich cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type); 41503c86aa70SEli Cohen 41513c86aa70SEli Cohen mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); 41523c86aa70SEli Cohen if (id_priv->id.ps == RDMA_PS_UDP) 41533c86aa70SEli Cohen mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY); 41543c86aa70SEli Cohen 41553c86aa70SEli Cohen if (dev_addr->bound_dev_if) 4156052eac6eSParav Pandit ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if); 41573c86aa70SEli Cohen if (!ndev) { 41583c86aa70SEli Cohen err = -ENODEV; 41593c86aa70SEli Cohen goto out2; 41603c86aa70SEli Cohen } 41613c86aa70SEli Cohen mc->multicast.ib->rec.rate = iboe_get_rate(ndev); 41623c86aa70SEli Cohen mc->multicast.ib->rec.hop_limit = 1; 41633c86aa70SEli Cohen mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); 4164bee3c3c9SMoni Shoua 4165bee3c3c9SMoni Shoua if (addr->sa_family == AF_INET) { 4166c65f6c5aSAlex Vesker if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) { 4167c65f6c5aSAlex Vesker mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT; 4168ab15c95aSAlex Vesker if (!send_only) { 4169bee3c3c9SMoni Shoua err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, 4170bee3c3c9SMoni Shoua true); 4171c65f6c5aSAlex Vesker if (!err) 4172bee3c3c9SMoni Shoua mc->igmp_joined = true; 4173bee3c3c9SMoni Shoua } 4174bee3c3c9SMoni Shoua } 4175bee3c3c9SMoni Shoua } else { 4176bee3c3c9SMoni Shoua if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) 4177bee3c3c9SMoni Shoua err = -ENOTSUPP; 4178bee3c3c9SMoni Shoua } 41793c86aa70SEli Cohen dev_put(ndev); 4180bee3c3c9SMoni Shoua if (err || !mc->multicast.ib->rec.mtu) { 4181bee3c3c9SMoni Shoua if (!err) 41823c86aa70SEli Cohen err = -EINVAL; 41833c86aa70SEli Cohen goto out2; 41843c86aa70SEli Cohen } 41857b85627bSMoni Shoua rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr, 41867b85627bSMoni Shoua &mc->multicast.ib->rec.port_gid); 41873c86aa70SEli Cohen work->id = id_priv; 41883c86aa70SEli Cohen work->mc = mc; 41893c86aa70SEli Cohen INIT_WORK(&work->work, iboe_mcast_work_handler); 41903c86aa70SEli Cohen kref_get(&mc->mcref); 41913c86aa70SEli Cohen queue_work(cma_wq, &work->work); 41923c86aa70SEli Cohen 41933c86aa70SEli Cohen return 0; 41943c86aa70SEli Cohen 41953c86aa70SEli Cohen out2: 41963c86aa70SEli Cohen kfree(mc->multicast.ib); 41973c86aa70SEli Cohen out1: 41983c86aa70SEli Cohen kfree(work); 41993c86aa70SEli Cohen return err; 42003c86aa70SEli Cohen } 42013c86aa70SEli Cohen 4202c8f6a362SSean Hefty int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, 4203ab15c95aSAlex Vesker u8 join_state, void *context) 4204c8f6a362SSean Hefty { 4205c8f6a362SSean Hefty struct rdma_id_private *id_priv; 4206c8f6a362SSean Hefty struct cma_multicast *mc; 4207c8f6a362SSean Hefty int ret; 4208c8f6a362SSean Hefty 42097688f2c3SLeon Romanovsky if (!id->device) 42107688f2c3SLeon Romanovsky return -EINVAL; 42117688f2c3SLeon Romanovsky 4212c8f6a362SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 4213550e5ca7SNir Muchtar if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) && 4214550e5ca7SNir Muchtar !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED)) 4215c8f6a362SSean Hefty return -EINVAL; 4216c8f6a362SSean Hefty 4217c8f6a362SSean Hefty mc = kmalloc(sizeof *mc, GFP_KERNEL); 4218c8f6a362SSean Hefty if (!mc) 4219c8f6a362SSean Hefty return -ENOMEM; 4220c8f6a362SSean Hefty 4221ef560861SSean Hefty memcpy(&mc->addr, addr, rdma_addr_size(addr)); 4222c8f6a362SSean Hefty mc->context = context; 4223c8f6a362SSean Hefty mc->id_priv = id_priv; 4224bee3c3c9SMoni Shoua mc->igmp_joined = false; 4225ab15c95aSAlex Vesker mc->join_state = join_state; 4226c8f6a362SSean Hefty spin_lock(&id_priv->lock); 4227c8f6a362SSean Hefty list_add(&mc->list, &id_priv->mc_list); 4228c8f6a362SSean Hefty spin_unlock(&id_priv->lock); 4229c8f6a362SSean Hefty 42305d9fb044SIra Weiny if (rdma_protocol_roce(id->device, id->port_num)) { 42313c86aa70SEli Cohen kref_init(&mc->mcref); 42323c86aa70SEli Cohen ret = cma_iboe_join_multicast(id_priv, mc); 4233a31ad3b0SMichael Wang } else if (rdma_cap_ib_mcast(id->device, id->port_num)) 42345c9a5282SMichael Wang ret = cma_join_ib_multicast(id_priv, mc); 42355c9a5282SMichael Wang else 4236c8f6a362SSean Hefty ret = -ENOSYS; 4237c8f6a362SSean Hefty 4238c8f6a362SSean Hefty if (ret) { 4239c8f6a362SSean Hefty spin_lock_irq(&id_priv->lock); 4240c8f6a362SSean Hefty list_del(&mc->list); 4241c8f6a362SSean Hefty spin_unlock_irq(&id_priv->lock); 4242c8f6a362SSean Hefty kfree(mc); 4243c8f6a362SSean Hefty } 4244c8f6a362SSean Hefty return ret; 4245c8f6a362SSean Hefty } 4246c8f6a362SSean Hefty EXPORT_SYMBOL(rdma_join_multicast); 4247c8f6a362SSean Hefty 4248c8f6a362SSean Hefty void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) 4249c8f6a362SSean Hefty { 4250c8f6a362SSean Hefty struct rdma_id_private *id_priv; 4251c8f6a362SSean Hefty struct cma_multicast *mc; 4252c8f6a362SSean Hefty 4253c8f6a362SSean Hefty id_priv = container_of(id, struct rdma_id_private, id); 4254c8f6a362SSean Hefty spin_lock_irq(&id_priv->lock); 4255c8f6a362SSean Hefty list_for_each_entry(mc, &id_priv->mc_list, list) { 4256ef560861SSean Hefty if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) { 4257c8f6a362SSean Hefty list_del(&mc->list); 4258c8f6a362SSean Hefty spin_unlock_irq(&id_priv->lock); 4259c8f6a362SSean Hefty 4260c8f6a362SSean Hefty if (id->qp) 4261c8f6a362SSean Hefty ib_detach_mcast(id->qp, 4262c8f6a362SSean Hefty &mc->multicast.ib->rec.mgid, 426346ea5061SSean Hefty be16_to_cpu(mc->multicast.ib->rec.mlid)); 42645c9a5282SMichael Wang 42655c9a5282SMichael Wang BUG_ON(id_priv->cma_dev->device != id->device); 42665c9a5282SMichael Wang 4267a31ad3b0SMichael Wang if (rdma_cap_ib_mcast(id->device, id->port_num)) { 4268c8f6a362SSean Hefty ib_sa_free_multicast(mc->multicast.ib); 4269c8f6a362SSean Hefty kfree(mc); 4270bee3c3c9SMoni Shoua } else if (rdma_protocol_roce(id->device, id->port_num)) { 4271bee3c3c9SMoni Shoua if (mc->igmp_joined) { 4272bee3c3c9SMoni Shoua struct rdma_dev_addr *dev_addr = 4273bee3c3c9SMoni Shoua &id->route.addr.dev_addr; 4274bee3c3c9SMoni Shoua struct net_device *ndev = NULL; 42755c9a5282SMichael Wang 4276bee3c3c9SMoni Shoua if (dev_addr->bound_dev_if) 4277052eac6eSParav Pandit ndev = dev_get_by_index(dev_addr->net, 4278bee3c3c9SMoni Shoua dev_addr->bound_dev_if); 4279bee3c3c9SMoni Shoua if (ndev) { 4280bee3c3c9SMoni Shoua cma_igmp_send(ndev, 4281bee3c3c9SMoni Shoua &mc->multicast.ib->rec.mgid, 4282bee3c3c9SMoni Shoua false); 4283bee3c3c9SMoni Shoua dev_put(ndev); 4284bee3c3c9SMoni Shoua } 4285bee3c3c9SMoni Shoua mc->igmp_joined = false; 4286bee3c3c9SMoni Shoua } 4287bee3c3c9SMoni Shoua kref_put(&mc->mcref, release_mc); 4288bee3c3c9SMoni Shoua } 4289c8f6a362SSean Hefty return; 4290c8f6a362SSean Hefty } 4291c8f6a362SSean Hefty } 4292c8f6a362SSean Hefty spin_unlock_irq(&id_priv->lock); 4293c8f6a362SSean Hefty } 4294c8f6a362SSean Hefty EXPORT_SYMBOL(rdma_leave_multicast); 4295c8f6a362SSean Hefty 4296dd5bdff8SOr Gerlitz static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv) 4297dd5bdff8SOr Gerlitz { 4298dd5bdff8SOr Gerlitz struct rdma_dev_addr *dev_addr; 4299dd5bdff8SOr Gerlitz struct cma_ndev_work *work; 4300dd5bdff8SOr Gerlitz 4301dd5bdff8SOr Gerlitz dev_addr = &id_priv->id.route.addr.dev_addr; 4302dd5bdff8SOr Gerlitz 43036266ed6eSSean Hefty if ((dev_addr->bound_dev_if == ndev->ifindex) && 4304fa20105eSGuy Shapiro (net_eq(dev_net(ndev), dev_addr->net)) && 4305dd5bdff8SOr Gerlitz memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) { 4306aba25a3eSParav Pandit pr_info("RDMA CM addr change for ndev %s used by id %p\n", 4307dd5bdff8SOr Gerlitz ndev->name, &id_priv->id); 4308dd5bdff8SOr Gerlitz work = kzalloc(sizeof *work, GFP_KERNEL); 4309dd5bdff8SOr Gerlitz if (!work) 4310dd5bdff8SOr Gerlitz return -ENOMEM; 4311dd5bdff8SOr Gerlitz 4312dd5bdff8SOr Gerlitz INIT_WORK(&work->work, cma_ndev_work_handler); 4313dd5bdff8SOr Gerlitz work->id = id_priv; 4314dd5bdff8SOr Gerlitz work->event.event = RDMA_CM_EVENT_ADDR_CHANGE; 4315dd5bdff8SOr Gerlitz atomic_inc(&id_priv->refcount); 4316dd5bdff8SOr Gerlitz queue_work(cma_wq, &work->work); 4317dd5bdff8SOr Gerlitz } 4318dd5bdff8SOr Gerlitz 4319dd5bdff8SOr Gerlitz return 0; 4320dd5bdff8SOr Gerlitz } 4321dd5bdff8SOr Gerlitz 4322dd5bdff8SOr Gerlitz static int cma_netdev_callback(struct notifier_block *self, unsigned long event, 4323351638e7SJiri Pirko void *ptr) 4324dd5bdff8SOr Gerlitz { 4325351638e7SJiri Pirko struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 4326dd5bdff8SOr Gerlitz struct cma_device *cma_dev; 4327dd5bdff8SOr Gerlitz struct rdma_id_private *id_priv; 4328dd5bdff8SOr Gerlitz int ret = NOTIFY_DONE; 4329dd5bdff8SOr Gerlitz 4330dd5bdff8SOr Gerlitz if (event != NETDEV_BONDING_FAILOVER) 4331dd5bdff8SOr Gerlitz return NOTIFY_DONE; 4332dd5bdff8SOr Gerlitz 43333cd96fddSParav Pandit if (!netif_is_bond_master(ndev)) 4334dd5bdff8SOr Gerlitz return NOTIFY_DONE; 4335dd5bdff8SOr Gerlitz 4336dd5bdff8SOr Gerlitz mutex_lock(&lock); 4337dd5bdff8SOr Gerlitz list_for_each_entry(cma_dev, &dev_list, list) 4338dd5bdff8SOr Gerlitz list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4339dd5bdff8SOr Gerlitz ret = cma_netdev_change(ndev, id_priv); 4340dd5bdff8SOr Gerlitz if (ret) 4341dd5bdff8SOr Gerlitz goto out; 4342dd5bdff8SOr Gerlitz } 4343dd5bdff8SOr Gerlitz 4344dd5bdff8SOr Gerlitz out: 4345dd5bdff8SOr Gerlitz mutex_unlock(&lock); 4346dd5bdff8SOr Gerlitz return ret; 4347dd5bdff8SOr Gerlitz } 4348dd5bdff8SOr Gerlitz 4349dd5bdff8SOr Gerlitz static struct notifier_block cma_nb = { 4350dd5bdff8SOr Gerlitz .notifier_call = cma_netdev_callback 4351dd5bdff8SOr Gerlitz }; 4352dd5bdff8SOr Gerlitz 4353e51060f0SSean Hefty static void cma_add_one(struct ib_device *device) 4354e51060f0SSean Hefty { 4355e51060f0SSean Hefty struct cma_device *cma_dev; 4356e51060f0SSean Hefty struct rdma_id_private *id_priv; 4357045959dbSMatan Barak unsigned int i; 4358045959dbSMatan Barak unsigned long supported_gids = 0; 4359e51060f0SSean Hefty 4360e51060f0SSean Hefty cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL); 4361e51060f0SSean Hefty if (!cma_dev) 4362e51060f0SSean Hefty return; 4363e51060f0SSean Hefty 4364e51060f0SSean Hefty cma_dev->device = device; 4365045959dbSMatan Barak cma_dev->default_gid_type = kcalloc(device->phys_port_cnt, 4366045959dbSMatan Barak sizeof(*cma_dev->default_gid_type), 4367045959dbSMatan Barak GFP_KERNEL); 436889052d78SMajd Dibbiny if (!cma_dev->default_gid_type) 436989052d78SMajd Dibbiny goto free_cma_dev; 437089052d78SMajd Dibbiny 437189052d78SMajd Dibbiny cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt, 437289052d78SMajd Dibbiny sizeof(*cma_dev->default_roce_tos), 437389052d78SMajd Dibbiny GFP_KERNEL); 437489052d78SMajd Dibbiny if (!cma_dev->default_roce_tos) 437589052d78SMajd Dibbiny goto free_gid_type; 437689052d78SMajd Dibbiny 4377045959dbSMatan Barak for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) { 4378045959dbSMatan Barak supported_gids = roce_gid_type_mask_support(device, i); 4379045959dbSMatan Barak WARN_ON(!supported_gids); 43805ab2d89bSLeon Romanovsky if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE)) 438163a5f483SMoni Shoua cma_dev->default_gid_type[i - rdma_start_port(device)] = 438263a5f483SMoni Shoua CMA_PREFERRED_ROCE_GID_TYPE; 438363a5f483SMoni Shoua else 4384045959dbSMatan Barak cma_dev->default_gid_type[i - rdma_start_port(device)] = 4385045959dbSMatan Barak find_first_bit(&supported_gids, BITS_PER_LONG); 438689052d78SMajd Dibbiny cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0; 4387045959dbSMatan Barak } 4388e51060f0SSean Hefty 4389e51060f0SSean Hefty init_completion(&cma_dev->comp); 4390e51060f0SSean Hefty atomic_set(&cma_dev->refcount, 1); 4391e51060f0SSean Hefty INIT_LIST_HEAD(&cma_dev->id_list); 4392e51060f0SSean Hefty ib_set_client_data(device, &cma_client, cma_dev); 4393e51060f0SSean Hefty 4394e51060f0SSean Hefty mutex_lock(&lock); 4395e51060f0SSean Hefty list_add_tail(&cma_dev->list, &dev_list); 4396e51060f0SSean Hefty list_for_each_entry(id_priv, &listen_any_list, list) 4397e51060f0SSean Hefty cma_listen_on_dev(id_priv, cma_dev); 4398e51060f0SSean Hefty mutex_unlock(&lock); 439989052d78SMajd Dibbiny 440089052d78SMajd Dibbiny return; 440189052d78SMajd Dibbiny 440289052d78SMajd Dibbiny free_gid_type: 440389052d78SMajd Dibbiny kfree(cma_dev->default_gid_type); 440489052d78SMajd Dibbiny 440589052d78SMajd Dibbiny free_cma_dev: 440689052d78SMajd Dibbiny kfree(cma_dev); 440789052d78SMajd Dibbiny 440889052d78SMajd Dibbiny return; 4409e51060f0SSean Hefty } 4410e51060f0SSean Hefty 4411e51060f0SSean Hefty static int cma_remove_id_dev(struct rdma_id_private *id_priv) 4412e51060f0SSean Hefty { 4413a1b1b61fSSean Hefty struct rdma_cm_event event; 4414550e5ca7SNir Muchtar enum rdma_cm_state state; 4415de910bd9SOr Gerlitz int ret = 0; 4416e51060f0SSean Hefty 4417e51060f0SSean Hefty /* Record that we want to remove the device */ 4418550e5ca7SNir Muchtar state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL); 4419550e5ca7SNir Muchtar if (state == RDMA_CM_DESTROYING) 4420e51060f0SSean Hefty return 0; 4421e51060f0SSean Hefty 4422e51060f0SSean Hefty cma_cancel_operation(id_priv, state); 4423de910bd9SOr Gerlitz mutex_lock(&id_priv->handler_mutex); 4424e51060f0SSean Hefty 4425e51060f0SSean Hefty /* Check for destruction from another callback. */ 4426550e5ca7SNir Muchtar if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL)) 4427de910bd9SOr Gerlitz goto out; 4428e51060f0SSean Hefty 4429a1b1b61fSSean Hefty memset(&event, 0, sizeof event); 4430a1b1b61fSSean Hefty event.event = RDMA_CM_EVENT_DEVICE_REMOVAL; 4431de910bd9SOr Gerlitz ret = id_priv->id.event_handler(&id_priv->id, &event); 4432de910bd9SOr Gerlitz out: 4433de910bd9SOr Gerlitz mutex_unlock(&id_priv->handler_mutex); 4434de910bd9SOr Gerlitz return ret; 4435e51060f0SSean Hefty } 4436e51060f0SSean Hefty 4437e51060f0SSean Hefty static void cma_process_remove(struct cma_device *cma_dev) 4438e51060f0SSean Hefty { 4439e51060f0SSean Hefty struct rdma_id_private *id_priv; 4440e51060f0SSean Hefty int ret; 4441e51060f0SSean Hefty 4442e51060f0SSean Hefty mutex_lock(&lock); 4443e51060f0SSean Hefty while (!list_empty(&cma_dev->id_list)) { 4444e51060f0SSean Hefty id_priv = list_entry(cma_dev->id_list.next, 4445e51060f0SSean Hefty struct rdma_id_private, list); 4446e51060f0SSean Hefty 4447d02d1f53SSean Hefty list_del(&id_priv->listen_list); 444894de178aSKrishna Kumar list_del_init(&id_priv->list); 4449e51060f0SSean Hefty atomic_inc(&id_priv->refcount); 4450e51060f0SSean Hefty mutex_unlock(&lock); 4451e51060f0SSean Hefty 4452d02d1f53SSean Hefty ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv); 4453e51060f0SSean Hefty cma_deref_id(id_priv); 4454e51060f0SSean Hefty if (ret) 4455e51060f0SSean Hefty rdma_destroy_id(&id_priv->id); 4456e51060f0SSean Hefty 4457e51060f0SSean Hefty mutex_lock(&lock); 4458e51060f0SSean Hefty } 4459e51060f0SSean Hefty mutex_unlock(&lock); 4460e51060f0SSean Hefty 4461e51060f0SSean Hefty cma_deref_dev(cma_dev); 4462e51060f0SSean Hefty wait_for_completion(&cma_dev->comp); 4463e51060f0SSean Hefty } 4464e51060f0SSean Hefty 44657c1eb45aSHaggai Eran static void cma_remove_one(struct ib_device *device, void *client_data) 4466e51060f0SSean Hefty { 44677c1eb45aSHaggai Eran struct cma_device *cma_dev = client_data; 4468e51060f0SSean Hefty 4469e51060f0SSean Hefty if (!cma_dev) 4470e51060f0SSean Hefty return; 4471e51060f0SSean Hefty 4472e51060f0SSean Hefty mutex_lock(&lock); 4473e51060f0SSean Hefty list_del(&cma_dev->list); 4474e51060f0SSean Hefty mutex_unlock(&lock); 4475e51060f0SSean Hefty 4476e51060f0SSean Hefty cma_process_remove(cma_dev); 447789052d78SMajd Dibbiny kfree(cma_dev->default_roce_tos); 4478045959dbSMatan Barak kfree(cma_dev->default_gid_type); 4479e51060f0SSean Hefty kfree(cma_dev); 4480e51060f0SSean Hefty } 4481e51060f0SSean Hefty 4482753f618aSNir Muchtar static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) 4483753f618aSNir Muchtar { 4484753f618aSNir Muchtar struct nlmsghdr *nlh; 4485753f618aSNir Muchtar struct rdma_cm_id_stats *id_stats; 4486753f618aSNir Muchtar struct rdma_id_private *id_priv; 4487753f618aSNir Muchtar struct rdma_cm_id *id = NULL; 4488753f618aSNir Muchtar struct cma_device *cma_dev; 4489753f618aSNir Muchtar int i_dev = 0, i_id = 0; 4490753f618aSNir Muchtar 4491753f618aSNir Muchtar /* 4492753f618aSNir Muchtar * We export all of the IDs as a sequence of messages. Each 4493753f618aSNir Muchtar * ID gets its own netlink message. 4494753f618aSNir Muchtar */ 4495753f618aSNir Muchtar mutex_lock(&lock); 4496753f618aSNir Muchtar 4497753f618aSNir Muchtar list_for_each_entry(cma_dev, &dev_list, list) { 4498753f618aSNir Muchtar if (i_dev < cb->args[0]) { 4499753f618aSNir Muchtar i_dev++; 4500753f618aSNir Muchtar continue; 4501753f618aSNir Muchtar } 4502753f618aSNir Muchtar 4503753f618aSNir Muchtar i_id = 0; 4504753f618aSNir Muchtar list_for_each_entry(id_priv, &cma_dev->id_list, list) { 4505753f618aSNir Muchtar if (i_id < cb->args[1]) { 4506753f618aSNir Muchtar i_id++; 4507753f618aSNir Muchtar continue; 4508753f618aSNir Muchtar } 4509753f618aSNir Muchtar 4510753f618aSNir Muchtar id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, 4511753f618aSNir Muchtar sizeof *id_stats, RDMA_NL_RDMA_CM, 451230dc5e63STatyana Nikolova RDMA_NL_RDMA_CM_ID_STATS, 451330dc5e63STatyana Nikolova NLM_F_MULTI); 4514753f618aSNir Muchtar if (!id_stats) 4515753f618aSNir Muchtar goto out; 4516753f618aSNir Muchtar 4517753f618aSNir Muchtar memset(id_stats, 0, sizeof *id_stats); 4518753f618aSNir Muchtar id = &id_priv->id; 4519753f618aSNir Muchtar id_stats->node_type = id->route.addr.dev_addr.dev_type; 4520753f618aSNir Muchtar id_stats->port_num = id->port_num; 4521753f618aSNir Muchtar id_stats->bound_dev_if = 4522753f618aSNir Muchtar id->route.addr.dev_addr.bound_dev_if; 4523753f618aSNir Muchtar 4524753f618aSNir Muchtar if (ibnl_put_attr(skb, nlh, 4525ce117ffaSSean Hefty rdma_addr_size(cma_src_addr(id_priv)), 4526f4753834SSean Hefty cma_src_addr(id_priv), 4527ce117ffaSSean Hefty RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) 4528753f618aSNir Muchtar goto out; 4529753f618aSNir Muchtar if (ibnl_put_attr(skb, nlh, 45307baaa49aSParav Pandit rdma_addr_size(cma_dst_addr(id_priv)), 4531f4753834SSean Hefty cma_dst_addr(id_priv), 4532ce117ffaSSean Hefty RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) 4533753f618aSNir Muchtar goto out; 4534753f618aSNir Muchtar 453500313983SSteve Wise id_stats->pid = task_pid_vnr(id_priv->res.task); 4536753f618aSNir Muchtar id_stats->port_space = id->ps; 4537753f618aSNir Muchtar id_stats->cm_state = id_priv->state; 4538753f618aSNir Muchtar id_stats->qp_num = id_priv->qp_num; 4539753f618aSNir Muchtar id_stats->qp_type = id->qp_type; 4540753f618aSNir Muchtar 4541753f618aSNir Muchtar i_id++; 4542e48e5e19SLeon Romanovsky nlmsg_end(skb, nlh); 4543753f618aSNir Muchtar } 4544753f618aSNir Muchtar 4545753f618aSNir Muchtar cb->args[1] = 0; 4546753f618aSNir Muchtar i_dev++; 4547753f618aSNir Muchtar } 4548753f618aSNir Muchtar 4549753f618aSNir Muchtar out: 4550753f618aSNir Muchtar mutex_unlock(&lock); 4551753f618aSNir Muchtar cb->args[0] = i_dev; 4552753f618aSNir Muchtar cb->args[1] = i_id; 4553753f618aSNir Muchtar 4554753f618aSNir Muchtar return skb->len; 4555753f618aSNir Muchtar } 4556753f618aSNir Muchtar 4557d0e312feSLeon Romanovsky static const struct rdma_nl_cbs cma_cb_table[RDMA_NL_RDMA_CM_NUM_OPS] = { 455864401b69SLeon Romanovsky [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats}, 4559753f618aSNir Muchtar }; 4560753f618aSNir Muchtar 45614be74b42SHaggai Eran static int cma_init_net(struct net *net) 45624be74b42SHaggai Eran { 45634be74b42SHaggai Eran struct cma_pernet *pernet = cma_pernet(net); 45644be74b42SHaggai Eran 45654be74b42SHaggai Eran idr_init(&pernet->tcp_ps); 45664be74b42SHaggai Eran idr_init(&pernet->udp_ps); 45674be74b42SHaggai Eran idr_init(&pernet->ipoib_ps); 45684be74b42SHaggai Eran idr_init(&pernet->ib_ps); 45694be74b42SHaggai Eran 45704be74b42SHaggai Eran return 0; 45714be74b42SHaggai Eran } 45724be74b42SHaggai Eran 45734be74b42SHaggai Eran static void cma_exit_net(struct net *net) 45744be74b42SHaggai Eran { 45754be74b42SHaggai Eran struct cma_pernet *pernet = cma_pernet(net); 45764be74b42SHaggai Eran 45774be74b42SHaggai Eran idr_destroy(&pernet->tcp_ps); 45784be74b42SHaggai Eran idr_destroy(&pernet->udp_ps); 45794be74b42SHaggai Eran idr_destroy(&pernet->ipoib_ps); 45804be74b42SHaggai Eran idr_destroy(&pernet->ib_ps); 45814be74b42SHaggai Eran } 45824be74b42SHaggai Eran 45834be74b42SHaggai Eran static struct pernet_operations cma_pernet_operations = { 45844be74b42SHaggai Eran .init = cma_init_net, 45854be74b42SHaggai Eran .exit = cma_exit_net, 45864be74b42SHaggai Eran .id = &cma_pernet_id, 45874be74b42SHaggai Eran .size = sizeof(struct cma_pernet), 45884be74b42SHaggai Eran }; 45894be74b42SHaggai Eran 4590716abb1fSPeter Huewe static int __init cma_init(void) 4591e51060f0SSean Hefty { 45925d7220e8STetsuo Handa int ret; 4593227b60f5SStephen Hemminger 4594dee9acbbSBhaktipriya Shridhar cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM); 4595e51060f0SSean Hefty if (!cma_wq) 4596e51060f0SSean Hefty return -ENOMEM; 4597e51060f0SSean Hefty 45984be74b42SHaggai Eran ret = register_pernet_subsys(&cma_pernet_operations); 45994be74b42SHaggai Eran if (ret) 46004be74b42SHaggai Eran goto err_wq; 46014be74b42SHaggai Eran 4602c1a0b23bSMichael S. Tsirkin ib_sa_register_client(&sa_client); 4603dd5bdff8SOr Gerlitz register_netdevice_notifier(&cma_nb); 4604c1a0b23bSMichael S. Tsirkin 4605e51060f0SSean Hefty ret = ib_register_client(&cma_client); 4606e51060f0SSean Hefty if (ret) 4607e51060f0SSean Hefty goto err; 4608753f618aSNir Muchtar 4609c9901724SLeon Romanovsky rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table); 4610045959dbSMatan Barak cma_configfs_init(); 4611753f618aSNir Muchtar 4612e51060f0SSean Hefty return 0; 4613e51060f0SSean Hefty 4614e51060f0SSean Hefty err: 4615dd5bdff8SOr Gerlitz unregister_netdevice_notifier(&cma_nb); 4616c1a0b23bSMichael S. Tsirkin ib_sa_unregister_client(&sa_client); 46174be74b42SHaggai Eran err_wq: 4618e51060f0SSean Hefty destroy_workqueue(cma_wq); 4619e51060f0SSean Hefty return ret; 4620e51060f0SSean Hefty } 4621e51060f0SSean Hefty 4622716abb1fSPeter Huewe static void __exit cma_cleanup(void) 4623e51060f0SSean Hefty { 4624045959dbSMatan Barak cma_configfs_exit(); 4625c9901724SLeon Romanovsky rdma_nl_unregister(RDMA_NL_RDMA_CM); 4626e51060f0SSean Hefty ib_unregister_client(&cma_client); 4627dd5bdff8SOr Gerlitz unregister_netdevice_notifier(&cma_nb); 4628c1a0b23bSMichael S. Tsirkin ib_sa_unregister_client(&sa_client); 46294be74b42SHaggai Eran unregister_pernet_subsys(&cma_pernet_operations); 4630e51060f0SSean Hefty destroy_workqueue(cma_wq); 4631e51060f0SSean Hefty } 4632e51060f0SSean Hefty 4633e3bf14bdSJason Gunthorpe MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1); 4634e3bf14bdSJason Gunthorpe 4635e51060f0SSean Hefty module_init(cma_init); 4636e51060f0SSean Hefty module_exit(cma_cleanup); 4637