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- // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
- /*
- * Copyright (c) 2005 Voltaire Inc. All rights reserved.
- * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
- * Copyright (c) 1999-2019, Mellanox Technologies, Inc. All rights reserved.
- * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
- */
- #include <linux/completion.h>
- #include <linux/in.h>
- #include <linux/in6.h>
- #include <linux/mutex.h>
- #include <linux/random.h>
- #include <linux/igmp.h>
- #include <linux/xarray.h>
- #include <linux/inetdevice.h>
- #include <linux/slab.h>
- #include <linux/module.h>
- #include <net/route.h>
- #include <net/net_namespace.h>
- #include <net/netns/generic.h>
- #include <net/tcp.h>
- #include <net/ipv6.h>
- #include <net/ip_fib.h>
- #include <net/ip6_route.h>
- #include <rdma/rdma_cm.h>
- #include <rdma/rdma_cm_ib.h>
- #include <rdma/rdma_netlink.h>
- #include <rdma/ib.h>
- #include <rdma/ib_cache.h>
- #include <rdma/ib_cm.h>
- #include <rdma/ib_sa.h>
- #include <rdma/iw_cm.h>
- #include "core_priv.h"
- #include "cma_priv.h"
- #include "cma_trace.h"
- MODULE_AUTHOR("Sean Hefty");
- MODULE_DESCRIPTION("Generic RDMA CM Agent");
- MODULE_LICENSE("Dual BSD/GPL");
- #define CMA_CM_RESPONSE_TIMEOUT 20
- #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
- #define CMA_MAX_CM_RETRIES 15
- #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
- #define CMA_IBOE_PACKET_LIFETIME 18
- #define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
- static const char * const cma_events[] = {
- [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
- [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
- [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
- [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
- [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
- [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
- [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
- [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
- [RDMA_CM_EVENT_REJECTED] = "rejected",
- [RDMA_CM_EVENT_ESTABLISHED] = "established",
- [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
- [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
- [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
- [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
- [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
- [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
- };
- static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
- enum ib_gid_type gid_type);
- const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
- {
- size_t index = event;
- return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
- cma_events[index] : "unrecognized event";
- }
- EXPORT_SYMBOL(rdma_event_msg);
- const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
- int reason)
- {
- if (rdma_ib_or_roce(id->device, id->port_num))
- return ibcm_reject_msg(reason);
- if (rdma_protocol_iwarp(id->device, id->port_num))
- return iwcm_reject_msg(reason);
- WARN_ON_ONCE(1);
- return "unrecognized transport";
- }
- EXPORT_SYMBOL(rdma_reject_msg);
- /**
- * rdma_is_consumer_reject - return true if the consumer rejected the connect
- * request.
- * @id: Communication identifier that received the REJECT event.
- * @reason: Value returned in the REJECT event status field.
- */
- static bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
- {
- if (rdma_ib_or_roce(id->device, id->port_num))
- return reason == IB_CM_REJ_CONSUMER_DEFINED;
- if (rdma_protocol_iwarp(id->device, id->port_num))
- return reason == -ECONNREFUSED;
- WARN_ON_ONCE(1);
- return false;
- }
- const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
- struct rdma_cm_event *ev, u8 *data_len)
- {
- const void *p;
- if (rdma_is_consumer_reject(id, ev->status)) {
- *data_len = ev->param.conn.private_data_len;
- p = ev->param.conn.private_data;
- } else {
- *data_len = 0;
- p = NULL;
- }
- return p;
- }
- EXPORT_SYMBOL(rdma_consumer_reject_data);
- /**
- * rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
- * @id: Communication Identifier
- */
- struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
- {
- struct rdma_id_private *id_priv;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (id->device->node_type == RDMA_NODE_RNIC)
- return id_priv->cm_id.iw;
- return NULL;
- }
- EXPORT_SYMBOL(rdma_iw_cm_id);
- /**
- * rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
- * @res: rdma resource tracking entry pointer
- */
- struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
- {
- struct rdma_id_private *id_priv =
- container_of(res, struct rdma_id_private, res);
- return &id_priv->id;
- }
- EXPORT_SYMBOL(rdma_res_to_id);
- static int cma_add_one(struct ib_device *device);
- static void cma_remove_one(struct ib_device *device, void *client_data);
- static struct ib_client cma_client = {
- .name = "cma",
- .add = cma_add_one,
- .remove = cma_remove_one
- };
- static struct ib_sa_client sa_client;
- static LIST_HEAD(dev_list);
- static LIST_HEAD(listen_any_list);
- static DEFINE_MUTEX(lock);
- static struct workqueue_struct *cma_wq;
- static unsigned int cma_pernet_id;
- struct cma_pernet {
- struct xarray tcp_ps;
- struct xarray udp_ps;
- struct xarray ipoib_ps;
- struct xarray ib_ps;
- };
- static struct cma_pernet *cma_pernet(struct net *net)
- {
- return net_generic(net, cma_pernet_id);
- }
- static
- struct xarray *cma_pernet_xa(struct net *net, enum rdma_ucm_port_space ps)
- {
- struct cma_pernet *pernet = cma_pernet(net);
- switch (ps) {
- case RDMA_PS_TCP:
- return &pernet->tcp_ps;
- case RDMA_PS_UDP:
- return &pernet->udp_ps;
- case RDMA_PS_IPOIB:
- return &pernet->ipoib_ps;
- case RDMA_PS_IB:
- return &pernet->ib_ps;
- default:
- return NULL;
- }
- }
- struct cma_device {
- struct list_head list;
- struct ib_device *device;
- struct completion comp;
- refcount_t refcount;
- struct list_head id_list;
- enum ib_gid_type *default_gid_type;
- u8 *default_roce_tos;
- };
- struct rdma_bind_list {
- enum rdma_ucm_port_space ps;
- struct hlist_head owners;
- unsigned short port;
- };
- struct class_port_info_context {
- struct ib_class_port_info *class_port_info;
- struct ib_device *device;
- struct completion done;
- struct ib_sa_query *sa_query;
- u8 port_num;
- };
- static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
- struct rdma_bind_list *bind_list, int snum)
- {
- struct xarray *xa = cma_pernet_xa(net, ps);
- return xa_insert(xa, snum, bind_list, GFP_KERNEL);
- }
- static struct rdma_bind_list *cma_ps_find(struct net *net,
- enum rdma_ucm_port_space ps, int snum)
- {
- struct xarray *xa = cma_pernet_xa(net, ps);
- return xa_load(xa, snum);
- }
- static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
- int snum)
- {
- struct xarray *xa = cma_pernet_xa(net, ps);
- xa_erase(xa, snum);
- }
- enum {
- CMA_OPTION_AFONLY,
- };
- void cma_dev_get(struct cma_device *cma_dev)
- {
- refcount_inc(&cma_dev->refcount);
- }
- void cma_dev_put(struct cma_device *cma_dev)
- {
- if (refcount_dec_and_test(&cma_dev->refcount))
- complete(&cma_dev->comp);
- }
- struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
- void *cookie)
- {
- struct cma_device *cma_dev;
- struct cma_device *found_cma_dev = NULL;
- mutex_lock(&lock);
- list_for_each_entry(cma_dev, &dev_list, list)
- if (filter(cma_dev->device, cookie)) {
- found_cma_dev = cma_dev;
- break;
- }
- if (found_cma_dev)
- cma_dev_get(found_cma_dev);
- mutex_unlock(&lock);
- return found_cma_dev;
- }
- int cma_get_default_gid_type(struct cma_device *cma_dev,
- unsigned int port)
- {
- if (!rdma_is_port_valid(cma_dev->device, port))
- return -EINVAL;
- return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
- }
- int cma_set_default_gid_type(struct cma_device *cma_dev,
- unsigned int port,
- enum ib_gid_type default_gid_type)
- {
- unsigned long supported_gids;
- if (!rdma_is_port_valid(cma_dev->device, port))
- return -EINVAL;
- if (default_gid_type == IB_GID_TYPE_IB &&
- rdma_protocol_roce_eth_encap(cma_dev->device, port))
- default_gid_type = IB_GID_TYPE_ROCE;
- supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
- if (!(supported_gids & 1 << default_gid_type))
- return -EINVAL;
- cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
- default_gid_type;
- return 0;
- }
- int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
- {
- if (!rdma_is_port_valid(cma_dev->device, port))
- return -EINVAL;
- return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
- }
- int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
- u8 default_roce_tos)
- {
- if (!rdma_is_port_valid(cma_dev->device, port))
- return -EINVAL;
- cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
- default_roce_tos;
- return 0;
- }
- struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
- {
- return cma_dev->device;
- }
- /*
- * Device removal can occur at anytime, so we need extra handling to
- * serialize notifying the user of device removal with other callbacks.
- * We do this by disabling removal notification while a callback is in process,
- * and reporting it after the callback completes.
- */
- struct cma_multicast {
- struct rdma_id_private *id_priv;
- union {
- struct ib_sa_multicast *sa_mc;
- struct {
- struct work_struct work;
- struct rdma_cm_event event;
- } iboe_join;
- };
- struct list_head list;
- void *context;
- struct sockaddr_storage addr;
- u8 join_state;
- };
- struct cma_work {
- struct work_struct work;
- struct rdma_id_private *id;
- enum rdma_cm_state old_state;
- enum rdma_cm_state new_state;
- struct rdma_cm_event event;
- };
- union cma_ip_addr {
- struct in6_addr ip6;
- struct {
- __be32 pad[3];
- __be32 addr;
- } ip4;
- };
- struct cma_hdr {
- u8 cma_version;
- u8 ip_version; /* IP version: 7:4 */
- __be16 port;
- union cma_ip_addr src_addr;
- union cma_ip_addr dst_addr;
- };
- #define CMA_VERSION 0x00
- struct cma_req_info {
- struct sockaddr_storage listen_addr_storage;
- struct sockaddr_storage src_addr_storage;
- struct ib_device *device;
- union ib_gid local_gid;
- __be64 service_id;
- int port;
- bool has_gid;
- u16 pkey;
- };
- static int cma_comp_exch(struct rdma_id_private *id_priv,
- enum rdma_cm_state comp, enum rdma_cm_state exch)
- {
- unsigned long flags;
- int ret;
- /*
- * The FSM uses a funny double locking where state is protected by both
- * the handler_mutex and the spinlock. State is not allowed to change
- * to/from a handler_mutex protected value without also holding
- * handler_mutex.
- */
- if (comp == RDMA_CM_CONNECT || exch == RDMA_CM_CONNECT)
- lockdep_assert_held(&id_priv->handler_mutex);
- spin_lock_irqsave(&id_priv->lock, flags);
- if ((ret = (id_priv->state == comp)))
- id_priv->state = exch;
- spin_unlock_irqrestore(&id_priv->lock, flags);
- return ret;
- }
- static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
- {
- return hdr->ip_version >> 4;
- }
- static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
- {
- hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
- }
- static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
- {
- struct in_device *in_dev = NULL;
- if (ndev) {
- rtnl_lock();
- in_dev = __in_dev_get_rtnl(ndev);
- if (in_dev) {
- if (join)
- ip_mc_inc_group(in_dev,
- *(__be32 *)(mgid->raw + 12));
- else
- ip_mc_dec_group(in_dev,
- *(__be32 *)(mgid->raw + 12));
- }
- rtnl_unlock();
- }
- return (in_dev) ? 0 : -ENODEV;
- }
- static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
- struct cma_device *cma_dev)
- {
- cma_dev_get(cma_dev);
- id_priv->cma_dev = cma_dev;
- id_priv->id.device = cma_dev->device;
- id_priv->id.route.addr.dev_addr.transport =
- rdma_node_get_transport(cma_dev->device->node_type);
- list_add_tail(&id_priv->list, &cma_dev->id_list);
- trace_cm_id_attach(id_priv, cma_dev->device);
- }
- static void cma_attach_to_dev(struct rdma_id_private *id_priv,
- struct cma_device *cma_dev)
- {
- _cma_attach_to_dev(id_priv, cma_dev);
- id_priv->gid_type =
- cma_dev->default_gid_type[id_priv->id.port_num -
- rdma_start_port(cma_dev->device)];
- }
- static void cma_release_dev(struct rdma_id_private *id_priv)
- {
- mutex_lock(&lock);
- list_del(&id_priv->list);
- cma_dev_put(id_priv->cma_dev);
- id_priv->cma_dev = NULL;
- id_priv->id.device = NULL;
- if (id_priv->id.route.addr.dev_addr.sgid_attr) {
- rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
- id_priv->id.route.addr.dev_addr.sgid_attr = NULL;
- }
- mutex_unlock(&lock);
- }
- static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
- {
- return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
- }
- static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
- {
- return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
- }
- static inline unsigned short cma_family(struct rdma_id_private *id_priv)
- {
- return id_priv->id.route.addr.src_addr.ss_family;
- }
- static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
- {
- struct ib_sa_mcmember_rec rec;
- int ret = 0;
- if (id_priv->qkey) {
- if (qkey && id_priv->qkey != qkey)
- return -EINVAL;
- return 0;
- }
- if (qkey) {
- id_priv->qkey = qkey;
- return 0;
- }
- switch (id_priv->id.ps) {
- case RDMA_PS_UDP:
- case RDMA_PS_IB:
- id_priv->qkey = RDMA_UDP_QKEY;
- break;
- case RDMA_PS_IPOIB:
- ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
- ret = ib_sa_get_mcmember_rec(id_priv->id.device,
- id_priv->id.port_num, &rec.mgid,
- &rec);
- if (!ret)
- id_priv->qkey = be32_to_cpu(rec.qkey);
- break;
- default:
- break;
- }
- return ret;
- }
- static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
- {
- dev_addr->dev_type = ARPHRD_INFINIBAND;
- rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
- ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
- }
- static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
- {
- int ret;
- if (addr->sa_family != AF_IB) {
- ret = rdma_translate_ip(addr, dev_addr);
- } else {
- cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
- ret = 0;
- }
- return ret;
- }
- static const struct ib_gid_attr *
- cma_validate_port(struct ib_device *device, u8 port,
- enum ib_gid_type gid_type,
- union ib_gid *gid,
- struct rdma_id_private *id_priv)
- {
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- int bound_if_index = dev_addr->bound_dev_if;
- const struct ib_gid_attr *sgid_attr;
- int dev_type = dev_addr->dev_type;
- struct net_device *ndev = NULL;
- if (!rdma_dev_access_netns(device, id_priv->id.route.addr.dev_addr.net))
- return ERR_PTR(-ENODEV);
- if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
- return ERR_PTR(-ENODEV);
- if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
- return ERR_PTR(-ENODEV);
- if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
- ndev = dev_get_by_index(dev_addr->net, bound_if_index);
- if (!ndev)
- return ERR_PTR(-ENODEV);
- } else {
- gid_type = IB_GID_TYPE_IB;
- }
- sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
- if (ndev)
- dev_put(ndev);
- return sgid_attr;
- }
- static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
- const struct ib_gid_attr *sgid_attr)
- {
- WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
- id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
- }
- /**
- * cma_acquire_dev_by_src_ip - Acquire cma device, port, gid attribute
- * based on source ip address.
- * @id_priv: cm_id which should be bound to cma device
- *
- * cma_acquire_dev_by_src_ip() binds cm id to cma device, port and GID attribute
- * based on source IP address. It returns 0 on success or error code otherwise.
- * It is applicable to active and passive side cm_id.
- */
- static int cma_acquire_dev_by_src_ip(struct rdma_id_private *id_priv)
- {
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- const struct ib_gid_attr *sgid_attr;
- union ib_gid gid, iboe_gid, *gidp;
- struct cma_device *cma_dev;
- enum ib_gid_type gid_type;
- int ret = -ENODEV;
- unsigned int port;
- if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
- id_priv->id.ps == RDMA_PS_IPOIB)
- return -EINVAL;
- rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
- &iboe_gid);
- memcpy(&gid, dev_addr->src_dev_addr +
- rdma_addr_gid_offset(dev_addr), sizeof(gid));
- mutex_lock(&lock);
- list_for_each_entry(cma_dev, &dev_list, list) {
- rdma_for_each_port (cma_dev->device, port) {
- gidp = rdma_protocol_roce(cma_dev->device, port) ?
- &iboe_gid : &gid;
- gid_type = cma_dev->default_gid_type[port - 1];
- sgid_attr = cma_validate_port(cma_dev->device, port,
- gid_type, gidp, id_priv);
- if (!IS_ERR(sgid_attr)) {
- id_priv->id.port_num = port;
- cma_bind_sgid_attr(id_priv, sgid_attr);
- cma_attach_to_dev(id_priv, cma_dev);
- ret = 0;
- goto out;
- }
- }
- }
- out:
- mutex_unlock(&lock);
- return ret;
- }
- /**
- * cma_ib_acquire_dev - Acquire cma device, port and SGID attribute
- * @id_priv: cm id to bind to cma device
- * @listen_id_priv: listener cm id to match against
- * @req: Pointer to req structure containaining incoming
- * request information
- * cma_ib_acquire_dev() acquires cma device, port and SGID attribute when
- * rdma device matches for listen_id and incoming request. It also verifies
- * that a GID table entry is present for the source address.
- * Returns 0 on success, or returns error code otherwise.
- */
- static int cma_ib_acquire_dev(struct rdma_id_private *id_priv,
- const struct rdma_id_private *listen_id_priv,
- struct cma_req_info *req)
- {
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- const struct ib_gid_attr *sgid_attr;
- enum ib_gid_type gid_type;
- union ib_gid gid;
- if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
- id_priv->id.ps == RDMA_PS_IPOIB)
- return -EINVAL;
- if (rdma_protocol_roce(req->device, req->port))
- rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
- &gid);
- else
- memcpy(&gid, dev_addr->src_dev_addr +
- rdma_addr_gid_offset(dev_addr), sizeof(gid));
- gid_type = listen_id_priv->cma_dev->default_gid_type[req->port - 1];
- sgid_attr = cma_validate_port(req->device, req->port,
- gid_type, &gid, id_priv);
- if (IS_ERR(sgid_attr))
- return PTR_ERR(sgid_attr);
- id_priv->id.port_num = req->port;
- cma_bind_sgid_attr(id_priv, sgid_attr);
- /* Need to acquire lock to protect against reader
- * of cma_dev->id_list such as cma_netdev_callback() and
- * cma_process_remove().
- */
- mutex_lock(&lock);
- cma_attach_to_dev(id_priv, listen_id_priv->cma_dev);
- mutex_unlock(&lock);
- rdma_restrack_add(&id_priv->res);
- return 0;
- }
- static int cma_iw_acquire_dev(struct rdma_id_private *id_priv,
- const struct rdma_id_private *listen_id_priv)
- {
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- const struct ib_gid_attr *sgid_attr;
- struct cma_device *cma_dev;
- enum ib_gid_type gid_type;
- int ret = -ENODEV;
- unsigned int port;
- union ib_gid gid;
- if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
- id_priv->id.ps == RDMA_PS_IPOIB)
- return -EINVAL;
- memcpy(&gid, dev_addr->src_dev_addr +
- rdma_addr_gid_offset(dev_addr), sizeof(gid));
- mutex_lock(&lock);
- cma_dev = listen_id_priv->cma_dev;
- port = listen_id_priv->id.port_num;
- gid_type = listen_id_priv->gid_type;
- sgid_attr = cma_validate_port(cma_dev->device, port,
- gid_type, &gid, id_priv);
- if (!IS_ERR(sgid_attr)) {
- id_priv->id.port_num = port;
- cma_bind_sgid_attr(id_priv, sgid_attr);
- ret = 0;
- goto out;
- }
- list_for_each_entry(cma_dev, &dev_list, list) {
- rdma_for_each_port (cma_dev->device, port) {
- if (listen_id_priv->cma_dev == cma_dev &&
- listen_id_priv->id.port_num == port)
- continue;
- gid_type = cma_dev->default_gid_type[port - 1];
- sgid_attr = cma_validate_port(cma_dev->device, port,
- gid_type, &gid, id_priv);
- if (!IS_ERR(sgid_attr)) {
- id_priv->id.port_num = port;
- cma_bind_sgid_attr(id_priv, sgid_attr);
- ret = 0;
- goto out;
- }
- }
- }
- out:
- if (!ret) {
- cma_attach_to_dev(id_priv, cma_dev);
- rdma_restrack_add(&id_priv->res);
- }
- mutex_unlock(&lock);
- return ret;
- }
- /*
- * Select the source IB device and address to reach the destination IB address.
- */
- static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
- {
- struct cma_device *cma_dev, *cur_dev;
- struct sockaddr_ib *addr;
- union ib_gid gid, sgid, *dgid;
- unsigned int p;
- u16 pkey, index;
- enum ib_port_state port_state;
- int ret;
- int i;
- cma_dev = NULL;
- addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
- dgid = (union ib_gid *) &addr->sib_addr;
- pkey = ntohs(addr->sib_pkey);
- mutex_lock(&lock);
- list_for_each_entry(cur_dev, &dev_list, list) {
- rdma_for_each_port (cur_dev->device, p) {
- if (!rdma_cap_af_ib(cur_dev->device, p))
- continue;
- if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
- continue;
- if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
- continue;
- for (i = 0; i < cur_dev->device->port_data[p].immutable.gid_tbl_len;
- ++i) {
- ret = rdma_query_gid(cur_dev->device, p, i,
- &gid);
- if (ret)
- continue;
- if (!memcmp(&gid, dgid, sizeof(gid))) {
- cma_dev = cur_dev;
- sgid = gid;
- id_priv->id.port_num = p;
- goto found;
- }
- if (!cma_dev && (gid.global.subnet_prefix ==
- dgid->global.subnet_prefix) &&
- port_state == IB_PORT_ACTIVE) {
- cma_dev = cur_dev;
- sgid = gid;
- id_priv->id.port_num = p;
- goto found;
- }
- }
- }
- }
- mutex_unlock(&lock);
- return -ENODEV;
- found:
- cma_attach_to_dev(id_priv, cma_dev);
- rdma_restrack_add(&id_priv->res);
- mutex_unlock(&lock);
- addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
- memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
- cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
- return 0;
- }
- static void cma_id_get(struct rdma_id_private *id_priv)
- {
- refcount_inc(&id_priv->refcount);
- }
- static void cma_id_put(struct rdma_id_private *id_priv)
- {
- if (refcount_dec_and_test(&id_priv->refcount))
- complete(&id_priv->comp);
- }
- static struct rdma_id_private *
- __rdma_create_id(struct net *net, rdma_cm_event_handler event_handler,
- void *context, enum rdma_ucm_port_space ps,
- enum ib_qp_type qp_type, const struct rdma_id_private *parent)
- {
- struct rdma_id_private *id_priv;
- id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
- if (!id_priv)
- return ERR_PTR(-ENOMEM);
- id_priv->state = RDMA_CM_IDLE;
- id_priv->id.context = context;
- id_priv->id.event_handler = event_handler;
- id_priv->id.ps = ps;
- id_priv->id.qp_type = qp_type;
- id_priv->tos_set = false;
- id_priv->timeout_set = false;
- id_priv->gid_type = IB_GID_TYPE_IB;
- spin_lock_init(&id_priv->lock);
- mutex_init(&id_priv->qp_mutex);
- init_completion(&id_priv->comp);
- refcount_set(&id_priv->refcount, 1);
- mutex_init(&id_priv->handler_mutex);
- INIT_LIST_HEAD(&id_priv->listen_list);
- INIT_LIST_HEAD(&id_priv->mc_list);
- get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
- id_priv->id.route.addr.dev_addr.net = get_net(net);
- id_priv->seq_num &= 0x00ffffff;
- rdma_restrack_new(&id_priv->res, RDMA_RESTRACK_CM_ID);
- if (parent)
- rdma_restrack_parent_name(&id_priv->res, &parent->res);
- return id_priv;
- }
- struct rdma_cm_id *
- __rdma_create_kernel_id(struct net *net, rdma_cm_event_handler event_handler,
- void *context, enum rdma_ucm_port_space ps,
- enum ib_qp_type qp_type, const char *caller)
- {
- struct rdma_id_private *ret;
- ret = __rdma_create_id(net, event_handler, context, ps, qp_type, NULL);
- if (IS_ERR(ret))
- return ERR_CAST(ret);
- rdma_restrack_set_name(&ret->res, caller);
- return &ret->id;
- }
- EXPORT_SYMBOL(__rdma_create_kernel_id);
- struct rdma_cm_id *rdma_create_user_id(rdma_cm_event_handler event_handler,
- void *context,
- enum rdma_ucm_port_space ps,
- enum ib_qp_type qp_type)
- {
- struct rdma_id_private *ret;
- ret = __rdma_create_id(current->nsproxy->net_ns, event_handler, context,
- ps, qp_type, NULL);
- if (IS_ERR(ret))
- return ERR_CAST(ret);
- rdma_restrack_set_name(&ret->res, NULL);
- return &ret->id;
- }
- EXPORT_SYMBOL(rdma_create_user_id);
- static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
- {
- struct ib_qp_attr qp_attr;
- int qp_attr_mask, ret;
- qp_attr.qp_state = IB_QPS_INIT;
- ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
- if (ret)
- return ret;
- ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
- if (ret)
- return ret;
- qp_attr.qp_state = IB_QPS_RTR;
- ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
- if (ret)
- return ret;
- qp_attr.qp_state = IB_QPS_RTS;
- qp_attr.sq_psn = 0;
- ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
- return ret;
- }
- static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
- {
- struct ib_qp_attr qp_attr;
- int qp_attr_mask, ret;
- qp_attr.qp_state = IB_QPS_INIT;
- ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
- if (ret)
- return ret;
- return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
- }
- int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
- struct ib_qp_init_attr *qp_init_attr)
- {
- struct rdma_id_private *id_priv;
- struct ib_qp *qp;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (id->device != pd->device) {
- ret = -EINVAL;
- goto out_err;
- }
- qp_init_attr->port_num = id->port_num;
- qp = ib_create_qp(pd, qp_init_attr);
- if (IS_ERR(qp)) {
- ret = PTR_ERR(qp);
- goto out_err;
- }
- if (id->qp_type == IB_QPT_UD)
- ret = cma_init_ud_qp(id_priv, qp);
- else
- ret = cma_init_conn_qp(id_priv, qp);
- if (ret)
- goto out_destroy;
- id->qp = qp;
- id_priv->qp_num = qp->qp_num;
- id_priv->srq = (qp->srq != NULL);
- trace_cm_qp_create(id_priv, pd, qp_init_attr, 0);
- return 0;
- out_destroy:
- ib_destroy_qp(qp);
- out_err:
- trace_cm_qp_create(id_priv, pd, qp_init_attr, ret);
- return ret;
- }
- EXPORT_SYMBOL(rdma_create_qp);
- void rdma_destroy_qp(struct rdma_cm_id *id)
- {
- struct rdma_id_private *id_priv;
- id_priv = container_of(id, struct rdma_id_private, id);
- trace_cm_qp_destroy(id_priv);
- mutex_lock(&id_priv->qp_mutex);
- ib_destroy_qp(id_priv->id.qp);
- id_priv->id.qp = NULL;
- mutex_unlock(&id_priv->qp_mutex);
- }
- EXPORT_SYMBOL(rdma_destroy_qp);
- static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
- struct rdma_conn_param *conn_param)
- {
- struct ib_qp_attr qp_attr;
- int qp_attr_mask, ret;
- mutex_lock(&id_priv->qp_mutex);
- if (!id_priv->id.qp) {
- ret = 0;
- goto out;
- }
- /* Need to update QP attributes from default values. */
- qp_attr.qp_state = IB_QPS_INIT;
- ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
- if (ret)
- goto out;
- ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
- if (ret)
- goto out;
- qp_attr.qp_state = IB_QPS_RTR;
- ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
- if (ret)
- goto out;
- BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
- if (conn_param)
- qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
- ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
- out:
- mutex_unlock(&id_priv->qp_mutex);
- return ret;
- }
- static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
- struct rdma_conn_param *conn_param)
- {
- struct ib_qp_attr qp_attr;
- int qp_attr_mask, ret;
- mutex_lock(&id_priv->qp_mutex);
- if (!id_priv->id.qp) {
- ret = 0;
- goto out;
- }
- qp_attr.qp_state = IB_QPS_RTS;
- ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
- if (ret)
- goto out;
- if (conn_param)
- qp_attr.max_rd_atomic = conn_param->initiator_depth;
- ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
- out:
- mutex_unlock(&id_priv->qp_mutex);
- return ret;
- }
- static int cma_modify_qp_err(struct rdma_id_private *id_priv)
- {
- struct ib_qp_attr qp_attr;
- int ret;
- mutex_lock(&id_priv->qp_mutex);
- if (!id_priv->id.qp) {
- ret = 0;
- goto out;
- }
- qp_attr.qp_state = IB_QPS_ERR;
- ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
- out:
- mutex_unlock(&id_priv->qp_mutex);
- return ret;
- }
- static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
- struct ib_qp_attr *qp_attr, int *qp_attr_mask)
- {
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- int ret;
- u16 pkey;
- if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
- pkey = 0xffff;
- else
- pkey = ib_addr_get_pkey(dev_addr);
- ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
- pkey, &qp_attr->pkey_index);
- if (ret)
- return ret;
- qp_attr->port_num = id_priv->id.port_num;
- *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
- if (id_priv->id.qp_type == IB_QPT_UD) {
- ret = cma_set_qkey(id_priv, 0);
- if (ret)
- return ret;
- qp_attr->qkey = id_priv->qkey;
- *qp_attr_mask |= IB_QP_QKEY;
- } else {
- qp_attr->qp_access_flags = 0;
- *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
- }
- return 0;
- }
- int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
- int *qp_attr_mask)
- {
- struct rdma_id_private *id_priv;
- int ret = 0;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (rdma_cap_ib_cm(id->device, id->port_num)) {
- if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
- ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
- else
- ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
- qp_attr_mask);
- if (qp_attr->qp_state == IB_QPS_RTR)
- qp_attr->rq_psn = id_priv->seq_num;
- } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
- if (!id_priv->cm_id.iw) {
- qp_attr->qp_access_flags = 0;
- *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
- } else
- ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
- qp_attr_mask);
- qp_attr->port_num = id_priv->id.port_num;
- *qp_attr_mask |= IB_QP_PORT;
- } else
- ret = -ENOSYS;
- if ((*qp_attr_mask & IB_QP_TIMEOUT) && id_priv->timeout_set)
- qp_attr->timeout = id_priv->timeout;
- return ret;
- }
- EXPORT_SYMBOL(rdma_init_qp_attr);
- static inline bool cma_zero_addr(const struct sockaddr *addr)
- {
- switch (addr->sa_family) {
- case AF_INET:
- return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
- case AF_INET6:
- return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
- case AF_IB:
- return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
- default:
- return false;
- }
- }
- static inline bool cma_loopback_addr(const struct sockaddr *addr)
- {
- switch (addr->sa_family) {
- case AF_INET:
- return ipv4_is_loopback(
- ((struct sockaddr_in *)addr)->sin_addr.s_addr);
- case AF_INET6:
- return ipv6_addr_loopback(
- &((struct sockaddr_in6 *)addr)->sin6_addr);
- case AF_IB:
- return ib_addr_loopback(
- &((struct sockaddr_ib *)addr)->sib_addr);
- default:
- return false;
- }
- }
- static inline bool cma_any_addr(const struct sockaddr *addr)
- {
- return cma_zero_addr(addr) || cma_loopback_addr(addr);
- }
- static int cma_addr_cmp(const struct sockaddr *src, const struct sockaddr *dst)
- {
- if (src->sa_family != dst->sa_family)
- return -1;
- switch (src->sa_family) {
- case AF_INET:
- return ((struct sockaddr_in *)src)->sin_addr.s_addr !=
- ((struct sockaddr_in *)dst)->sin_addr.s_addr;
- case AF_INET6: {
- struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *)src;
- struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *)dst;
- bool link_local;
- if (ipv6_addr_cmp(&src_addr6->sin6_addr,
- &dst_addr6->sin6_addr))
- return 1;
- link_local = ipv6_addr_type(&dst_addr6->sin6_addr) &
- IPV6_ADDR_LINKLOCAL;
- /* Link local must match their scope_ids */
- return link_local ? (src_addr6->sin6_scope_id !=
- dst_addr6->sin6_scope_id) :
- 0;
- }
- default:
- return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
- &((struct sockaddr_ib *) dst)->sib_addr);
- }
- }
- static __be16 cma_port(const struct sockaddr *addr)
- {
- struct sockaddr_ib *sib;
- switch (addr->sa_family) {
- case AF_INET:
- return ((struct sockaddr_in *) addr)->sin_port;
- case AF_INET6:
- return ((struct sockaddr_in6 *) addr)->sin6_port;
- case AF_IB:
- sib = (struct sockaddr_ib *) addr;
- return htons((u16) (be64_to_cpu(sib->sib_sid) &
- be64_to_cpu(sib->sib_sid_mask)));
- default:
- return 0;
- }
- }
- static inline int cma_any_port(const struct sockaddr *addr)
- {
- return !cma_port(addr);
- }
- static void cma_save_ib_info(struct sockaddr *src_addr,
- struct sockaddr *dst_addr,
- const struct rdma_cm_id *listen_id,
- const struct sa_path_rec *path)
- {
- struct sockaddr_ib *listen_ib, *ib;
- listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
- if (src_addr) {
- ib = (struct sockaddr_ib *)src_addr;
- ib->sib_family = AF_IB;
- if (path) {
- ib->sib_pkey = path->pkey;
- ib->sib_flowinfo = path->flow_label;
- memcpy(&ib->sib_addr, &path->sgid, 16);
- ib->sib_sid = path->service_id;
- ib->sib_scope_id = 0;
- } else {
- ib->sib_pkey = listen_ib->sib_pkey;
- ib->sib_flowinfo = listen_ib->sib_flowinfo;
- ib->sib_addr = listen_ib->sib_addr;
- ib->sib_sid = listen_ib->sib_sid;
- ib->sib_scope_id = listen_ib->sib_scope_id;
- }
- ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
- }
- if (dst_addr) {
- ib = (struct sockaddr_ib *)dst_addr;
- ib->sib_family = AF_IB;
- if (path) {
- ib->sib_pkey = path->pkey;
- ib->sib_flowinfo = path->flow_label;
- memcpy(&ib->sib_addr, &path->dgid, 16);
- }
- }
- }
- static void cma_save_ip4_info(struct sockaddr_in *src_addr,
- struct sockaddr_in *dst_addr,
- struct cma_hdr *hdr,
- __be16 local_port)
- {
- if (src_addr) {
- *src_addr = (struct sockaddr_in) {
- .sin_family = AF_INET,
- .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
- .sin_port = local_port,
- };
- }
- if (dst_addr) {
- *dst_addr = (struct sockaddr_in) {
- .sin_family = AF_INET,
- .sin_addr.s_addr = hdr->src_addr.ip4.addr,
- .sin_port = hdr->port,
- };
- }
- }
- static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
- struct sockaddr_in6 *dst_addr,
- struct cma_hdr *hdr,
- __be16 local_port)
- {
- if (src_addr) {
- *src_addr = (struct sockaddr_in6) {
- .sin6_family = AF_INET6,
- .sin6_addr = hdr->dst_addr.ip6,
- .sin6_port = local_port,
- };
- }
- if (dst_addr) {
- *dst_addr = (struct sockaddr_in6) {
- .sin6_family = AF_INET6,
- .sin6_addr = hdr->src_addr.ip6,
- .sin6_port = hdr->port,
- };
- }
- }
- static u16 cma_port_from_service_id(__be64 service_id)
- {
- return (u16)be64_to_cpu(service_id);
- }
- static int cma_save_ip_info(struct sockaddr *src_addr,
- struct sockaddr *dst_addr,
- const struct ib_cm_event *ib_event,
- __be64 service_id)
- {
- struct cma_hdr *hdr;
- __be16 port;
- hdr = ib_event->private_data;
- if (hdr->cma_version != CMA_VERSION)
- return -EINVAL;
- port = htons(cma_port_from_service_id(service_id));
- switch (cma_get_ip_ver(hdr)) {
- case 4:
- cma_save_ip4_info((struct sockaddr_in *)src_addr,
- (struct sockaddr_in *)dst_addr, hdr, port);
- break;
- case 6:
- cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
- (struct sockaddr_in6 *)dst_addr, hdr, port);
- break;
- default:
- return -EAFNOSUPPORT;
- }
- return 0;
- }
- static int cma_save_net_info(struct sockaddr *src_addr,
- struct sockaddr *dst_addr,
- const struct rdma_cm_id *listen_id,
- const struct ib_cm_event *ib_event,
- sa_family_t sa_family, __be64 service_id)
- {
- if (sa_family == AF_IB) {
- if (ib_event->event == IB_CM_REQ_RECEIVED)
- cma_save_ib_info(src_addr, dst_addr, listen_id,
- ib_event->param.req_rcvd.primary_path);
- else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
- cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
- return 0;
- }
- return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
- }
- static int cma_save_req_info(const struct ib_cm_event *ib_event,
- struct cma_req_info *req)
- {
- const struct ib_cm_req_event_param *req_param =
- &ib_event->param.req_rcvd;
- const struct ib_cm_sidr_req_event_param *sidr_param =
- &ib_event->param.sidr_req_rcvd;
- switch (ib_event->event) {
- case IB_CM_REQ_RECEIVED:
- req->device = req_param->listen_id->device;
- req->port = req_param->port;
- memcpy(&req->local_gid, &req_param->primary_path->sgid,
- sizeof(req->local_gid));
- req->has_gid = true;
- req->service_id = req_param->primary_path->service_id;
- req->pkey = be16_to_cpu(req_param->primary_path->pkey);
- if (req->pkey != req_param->bth_pkey)
- pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
- "RDMA CMA: in the future this may cause the request to be dropped\n",
- req_param->bth_pkey, req->pkey);
- break;
- case IB_CM_SIDR_REQ_RECEIVED:
- req->device = sidr_param->listen_id->device;
- req->port = sidr_param->port;
- req->has_gid = false;
- req->service_id = sidr_param->service_id;
- req->pkey = sidr_param->pkey;
- if (req->pkey != sidr_param->bth_pkey)
- pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
- "RDMA CMA: in the future this may cause the request to be dropped\n",
- sidr_param->bth_pkey, req->pkey);
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- static bool validate_ipv4_net_dev(struct net_device *net_dev,
- const struct sockaddr_in *dst_addr,
- const struct sockaddr_in *src_addr)
- {
- __be32 daddr = dst_addr->sin_addr.s_addr,
- saddr = src_addr->sin_addr.s_addr;
- struct fib_result res;
- struct flowi4 fl4;
- int err;
- bool ret;
- if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
- ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
- ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
- ipv4_is_loopback(saddr))
- return false;
- memset(&fl4, 0, sizeof(fl4));
- fl4.flowi4_iif = net_dev->ifindex;
- fl4.daddr = daddr;
- fl4.saddr = saddr;
- rcu_read_lock();
- err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
- ret = err == 0 && FIB_RES_DEV(res) == net_dev;
- rcu_read_unlock();
- return ret;
- }
- static bool validate_ipv6_net_dev(struct net_device *net_dev,
- const struct sockaddr_in6 *dst_addr,
- const struct sockaddr_in6 *src_addr)
- {
- #if IS_ENABLED(CONFIG_IPV6)
- const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
- IPV6_ADDR_LINKLOCAL;
- struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
- &src_addr->sin6_addr, net_dev->ifindex,
- NULL, strict);
- bool ret;
- if (!rt)
- return false;
- ret = rt->rt6i_idev->dev == net_dev;
- ip6_rt_put(rt);
- return ret;
- #else
- return false;
- #endif
- }
- static bool validate_net_dev(struct net_device *net_dev,
- const struct sockaddr *daddr,
- const struct sockaddr *saddr)
- {
- const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
- const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
- const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
- const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
- switch (daddr->sa_family) {
- case AF_INET:
- return saddr->sa_family == AF_INET &&
- validate_ipv4_net_dev(net_dev, daddr4, saddr4);
- case AF_INET6:
- return saddr->sa_family == AF_INET6 &&
- validate_ipv6_net_dev(net_dev, daddr6, saddr6);
- default:
- return false;
- }
- }
- static struct net_device *
- roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
- {
- const struct ib_gid_attr *sgid_attr = NULL;
- struct net_device *ndev;
- if (ib_event->event == IB_CM_REQ_RECEIVED)
- sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
- else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
- sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
- if (!sgid_attr)
- return NULL;
- rcu_read_lock();
- ndev = rdma_read_gid_attr_ndev_rcu(sgid_attr);
- if (IS_ERR(ndev))
- ndev = NULL;
- else
- dev_hold(ndev);
- rcu_read_unlock();
- return ndev;
- }
- static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
- struct cma_req_info *req)
- {
- struct sockaddr *listen_addr =
- (struct sockaddr *)&req->listen_addr_storage;
- struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
- struct net_device *net_dev;
- const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
- int err;
- err = cma_save_ip_info(listen_addr, src_addr, ib_event,
- req->service_id);
- if (err)
- return ERR_PTR(err);
- if (rdma_protocol_roce(req->device, req->port))
- net_dev = roce_get_net_dev_by_cm_event(ib_event);
- else
- net_dev = ib_get_net_dev_by_params(req->device, req->port,
- req->pkey,
- gid, listen_addr);
- if (!net_dev)
- return ERR_PTR(-ENODEV);
- return net_dev;
- }
- static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
- {
- return (be64_to_cpu(service_id) >> 16) & 0xffff;
- }
- static bool cma_match_private_data(struct rdma_id_private *id_priv,
- const struct cma_hdr *hdr)
- {
- struct sockaddr *addr = cma_src_addr(id_priv);
- __be32 ip4_addr;
- struct in6_addr ip6_addr;
- if (cma_any_addr(addr) && !id_priv->afonly)
- return true;
- switch (addr->sa_family) {
- case AF_INET:
- ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
- if (cma_get_ip_ver(hdr) != 4)
- return false;
- if (!cma_any_addr(addr) &&
- hdr->dst_addr.ip4.addr != ip4_addr)
- return false;
- break;
- case AF_INET6:
- ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
- if (cma_get_ip_ver(hdr) != 6)
- return false;
- if (!cma_any_addr(addr) &&
- memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
- return false;
- break;
- case AF_IB:
- return true;
- default:
- return false;
- }
- return true;
- }
- static bool cma_protocol_roce(const struct rdma_cm_id *id)
- {
- struct ib_device *device = id->device;
- const int port_num = id->port_num ?: rdma_start_port(device);
- return rdma_protocol_roce(device, port_num);
- }
- static bool cma_is_req_ipv6_ll(const struct cma_req_info *req)
- {
- const struct sockaddr *daddr =
- (const struct sockaddr *)&req->listen_addr_storage;
- const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
- /* Returns true if the req is for IPv6 link local */
- return (daddr->sa_family == AF_INET6 &&
- (ipv6_addr_type(&daddr6->sin6_addr) & IPV6_ADDR_LINKLOCAL));
- }
- static bool cma_match_net_dev(const struct rdma_cm_id *id,
- const struct net_device *net_dev,
- const struct cma_req_info *req)
- {
- const struct rdma_addr *addr = &id->route.addr;
- if (!net_dev)
- /* This request is an AF_IB request */
- return (!id->port_num || id->port_num == req->port) &&
- (addr->src_addr.ss_family == AF_IB);
- /*
- * If the request is not for IPv6 link local, allow matching
- * request to any netdevice of the one or multiport rdma device.
- */
- if (!cma_is_req_ipv6_ll(req))
- return true;
- /*
- * Net namespaces must match, and if the listner is listening
- * on a specific netdevice than netdevice must match as well.
- */
- if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
- (!!addr->dev_addr.bound_dev_if ==
- (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
- return true;
- else
- return false;
- }
- static struct rdma_id_private *cma_find_listener(
- const struct rdma_bind_list *bind_list,
- const struct ib_cm_id *cm_id,
- const struct ib_cm_event *ib_event,
- const struct cma_req_info *req,
- const struct net_device *net_dev)
- {
- struct rdma_id_private *id_priv, *id_priv_dev;
- lockdep_assert_held(&lock);
- if (!bind_list)
- return ERR_PTR(-EINVAL);
- hlist_for_each_entry(id_priv, &bind_list->owners, node) {
- if (cma_match_private_data(id_priv, ib_event->private_data)) {
- if (id_priv->id.device == cm_id->device &&
- cma_match_net_dev(&id_priv->id, net_dev, req))
- return id_priv;
- list_for_each_entry(id_priv_dev,
- &id_priv->listen_list,
- listen_list) {
- if (id_priv_dev->id.device == cm_id->device &&
- cma_match_net_dev(&id_priv_dev->id,
- net_dev, req))
- return id_priv_dev;
- }
- }
- }
- return ERR_PTR(-EINVAL);
- }
- static struct rdma_id_private *
- cma_ib_id_from_event(struct ib_cm_id *cm_id,
- const struct ib_cm_event *ib_event,
- struct cma_req_info *req,
- struct net_device **net_dev)
- {
- struct rdma_bind_list *bind_list;
- struct rdma_id_private *id_priv;
- int err;
- err = cma_save_req_info(ib_event, req);
- if (err)
- return ERR_PTR(err);
- *net_dev = cma_get_net_dev(ib_event, req);
- if (IS_ERR(*net_dev)) {
- if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
- /* Assuming the protocol is AF_IB */
- *net_dev = NULL;
- } else {
- return ERR_CAST(*net_dev);
- }
- }
- mutex_lock(&lock);
- /*
- * Net namespace might be getting deleted while route lookup,
- * cm_id lookup is in progress. Therefore, perform netdevice
- * validation, cm_id lookup under rcu lock.
- * RCU lock along with netdevice state check, synchronizes with
- * netdevice migrating to different net namespace and also avoids
- * case where net namespace doesn't get deleted while lookup is in
- * progress.
- * If the device state is not IFF_UP, its properties such as ifindex
- * and nd_net cannot be trusted to remain valid without rcu lock.
- * net/core/dev.c change_net_namespace() ensures to synchronize with
- * ongoing operations on net device after device is closed using
- * synchronize_net().
- */
- rcu_read_lock();
- if (*net_dev) {
- /*
- * If netdevice is down, it is likely that it is administratively
- * down or it might be migrating to different namespace.
- * In that case avoid further processing, as the net namespace
- * or ifindex may change.
- */
- if (((*net_dev)->flags & IFF_UP) == 0) {
- id_priv = ERR_PTR(-EHOSTUNREACH);
- goto err;
- }
- if (!validate_net_dev(*net_dev,
- (struct sockaddr *)&req->listen_addr_storage,
- (struct sockaddr *)&req->src_addr_storage)) {
- id_priv = ERR_PTR(-EHOSTUNREACH);
- goto err;
- }
- }
- bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
- rdma_ps_from_service_id(req->service_id),
- cma_port_from_service_id(req->service_id));
- id_priv = cma_find_listener(bind_list, cm_id, ib_event, req, *net_dev);
- err:
- rcu_read_unlock();
- mutex_unlock(&lock);
- if (IS_ERR(id_priv) && *net_dev) {
- dev_put(*net_dev);
- *net_dev = NULL;
- }
- return id_priv;
- }
- static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
- {
- return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
- }
- static void cma_cancel_route(struct rdma_id_private *id_priv)
- {
- if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
- if (id_priv->query)
- ib_sa_cancel_query(id_priv->query_id, id_priv->query);
- }
- }
- static void _cma_cancel_listens(struct rdma_id_private *id_priv)
- {
- struct rdma_id_private *dev_id_priv;
- lockdep_assert_held(&lock);
- /*
- * Remove from listen_any_list to prevent added devices from spawning
- * additional listen requests.
- */
- list_del(&id_priv->list);
- while (!list_empty(&id_priv->listen_list)) {
- dev_id_priv = list_entry(id_priv->listen_list.next,
- struct rdma_id_private, listen_list);
- /* sync with device removal to avoid duplicate destruction */
- list_del_init(&dev_id_priv->list);
- list_del(&dev_id_priv->listen_list);
- mutex_unlock(&lock);
- rdma_destroy_id(&dev_id_priv->id);
- mutex_lock(&lock);
- }
- }
- static void cma_cancel_listens(struct rdma_id_private *id_priv)
- {
- mutex_lock(&lock);
- _cma_cancel_listens(id_priv);
- mutex_unlock(&lock);
- }
- static void cma_cancel_operation(struct rdma_id_private *id_priv,
- enum rdma_cm_state state)
- {
- switch (state) {
- case RDMA_CM_ADDR_QUERY:
- rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
- break;
- case RDMA_CM_ROUTE_QUERY:
- cma_cancel_route(id_priv);
- break;
- case RDMA_CM_LISTEN:
- if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
- cma_cancel_listens(id_priv);
- break;
- default:
- break;
- }
- }
- static void cma_release_port(struct rdma_id_private *id_priv)
- {
- struct rdma_bind_list *bind_list = id_priv->bind_list;
- struct net *net = id_priv->id.route.addr.dev_addr.net;
- if (!bind_list)
- return;
- mutex_lock(&lock);
- hlist_del(&id_priv->node);
- if (hlist_empty(&bind_list->owners)) {
- cma_ps_remove(net, bind_list->ps, bind_list->port);
- kfree(bind_list);
- }
- mutex_unlock(&lock);
- }
- static void destroy_mc(struct rdma_id_private *id_priv,
- struct cma_multicast *mc)
- {
- bool send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
- if (rdma_cap_ib_mcast(id_priv->id.device, id_priv->id.port_num))
- ib_sa_free_multicast(mc->sa_mc);
- if (rdma_protocol_roce(id_priv->id.device, id_priv->id.port_num)) {
- struct rdma_dev_addr *dev_addr =
- &id_priv->id.route.addr.dev_addr;
- struct net_device *ndev = NULL;
- if (dev_addr->bound_dev_if)
- ndev = dev_get_by_index(dev_addr->net,
- dev_addr->bound_dev_if);
- if (ndev && !send_only) {
- enum ib_gid_type gid_type;
- union ib_gid mgid;
- gid_type = id_priv->cma_dev->default_gid_type
- [id_priv->id.port_num -
- rdma_start_port(
- id_priv->cma_dev->device)];
- cma_iboe_set_mgid((struct sockaddr *)&mc->addr, &mgid,
- gid_type);
- cma_igmp_send(ndev, &mgid, false);
- }
- dev_put(ndev);
- cancel_work_sync(&mc->iboe_join.work);
- }
- kfree(mc);
- }
- static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
- {
- struct cma_multicast *mc;
- while (!list_empty(&id_priv->mc_list)) {
- mc = list_first_entry(&id_priv->mc_list, struct cma_multicast,
- list);
- list_del(&mc->list);
- destroy_mc(id_priv, mc);
- }
- }
- static void _destroy_id(struct rdma_id_private *id_priv,
- enum rdma_cm_state state)
- {
- cma_cancel_operation(id_priv, state);
- rdma_restrack_del(&id_priv->res);
- if (id_priv->cma_dev) {
- if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
- if (id_priv->cm_id.ib)
- ib_destroy_cm_id(id_priv->cm_id.ib);
- } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
- if (id_priv->cm_id.iw)
- iw_destroy_cm_id(id_priv->cm_id.iw);
- }
- cma_leave_mc_groups(id_priv);
- cma_release_dev(id_priv);
- }
- cma_release_port(id_priv);
- cma_id_put(id_priv);
- wait_for_completion(&id_priv->comp);
- if (id_priv->internal_id)
- cma_id_put(id_priv->id.context);
- kfree(id_priv->id.route.path_rec);
- put_net(id_priv->id.route.addr.dev_addr.net);
- kfree(id_priv);
- }
- /*
- * destroy an ID from within the handler_mutex. This ensures that no other
- * handlers can start running concurrently.
- */
- static void destroy_id_handler_unlock(struct rdma_id_private *id_priv)
- __releases(&idprv->handler_mutex)
- {
- enum rdma_cm_state state;
- unsigned long flags;
- trace_cm_id_destroy(id_priv);
- /*
- * Setting the state to destroyed under the handler mutex provides a
- * fence against calling handler callbacks. If this is invoked due to
- * the failure of a handler callback then it guarentees that no future
- * handlers will be called.
- */
- lockdep_assert_held(&id_priv->handler_mutex);
- spin_lock_irqsave(&id_priv->lock, flags);
- state = id_priv->state;
- id_priv->state = RDMA_CM_DESTROYING;
- spin_unlock_irqrestore(&id_priv->lock, flags);
- mutex_unlock(&id_priv->handler_mutex);
- _destroy_id(id_priv, state);
- }
- void rdma_destroy_id(struct rdma_cm_id *id)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- mutex_lock(&id_priv->handler_mutex);
- destroy_id_handler_unlock(id_priv);
- }
- EXPORT_SYMBOL(rdma_destroy_id);
- static int cma_rep_recv(struct rdma_id_private *id_priv)
- {
- int ret;
- ret = cma_modify_qp_rtr(id_priv, NULL);
- if (ret)
- goto reject;
- ret = cma_modify_qp_rts(id_priv, NULL);
- if (ret)
- goto reject;
- trace_cm_send_rtu(id_priv);
- ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
- if (ret)
- goto reject;
- return 0;
- reject:
- pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
- cma_modify_qp_err(id_priv);
- trace_cm_send_rej(id_priv);
- ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
- NULL, 0, NULL, 0);
- return ret;
- }
- static void cma_set_rep_event_data(struct rdma_cm_event *event,
- const struct ib_cm_rep_event_param *rep_data,
- void *private_data)
- {
- event->param.conn.private_data = private_data;
- event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
- event->param.conn.responder_resources = rep_data->responder_resources;
- event->param.conn.initiator_depth = rep_data->initiator_depth;
- event->param.conn.flow_control = rep_data->flow_control;
- event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
- event->param.conn.srq = rep_data->srq;
- event->param.conn.qp_num = rep_data->remote_qpn;
- event->ece.vendor_id = rep_data->ece.vendor_id;
- event->ece.attr_mod = rep_data->ece.attr_mod;
- }
- static int cma_cm_event_handler(struct rdma_id_private *id_priv,
- struct rdma_cm_event *event)
- {
- int ret;
- lockdep_assert_held(&id_priv->handler_mutex);
- trace_cm_event_handler(id_priv, event);
- ret = id_priv->id.event_handler(&id_priv->id, event);
- trace_cm_event_done(id_priv, event, ret);
- return ret;
- }
- static int cma_ib_handler(struct ib_cm_id *cm_id,
- const struct ib_cm_event *ib_event)
- {
- struct rdma_id_private *id_priv = cm_id->context;
- struct rdma_cm_event event = {};
- enum rdma_cm_state state;
- int ret;
- mutex_lock(&id_priv->handler_mutex);
- state = READ_ONCE(id_priv->state);
- if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
- state != RDMA_CM_CONNECT) ||
- (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
- state != RDMA_CM_DISCONNECT))
- goto out;
- switch (ib_event->event) {
- case IB_CM_REQ_ERROR:
- case IB_CM_REP_ERROR:
- event.event = RDMA_CM_EVENT_UNREACHABLE;
- event.status = -ETIMEDOUT;
- break;
- case IB_CM_REP_RECEIVED:
- if (state == RDMA_CM_CONNECT &&
- (id_priv->id.qp_type != IB_QPT_UD)) {
- trace_cm_send_mra(id_priv);
- ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
- }
- if (id_priv->id.qp) {
- event.status = cma_rep_recv(id_priv);
- event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
- RDMA_CM_EVENT_ESTABLISHED;
- } else {
- event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
- }
- cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
- ib_event->private_data);
- break;
- case IB_CM_RTU_RECEIVED:
- case IB_CM_USER_ESTABLISHED:
- event.event = RDMA_CM_EVENT_ESTABLISHED;
- break;
- case IB_CM_DREQ_ERROR:
- event.status = -ETIMEDOUT;
- fallthrough;
- case IB_CM_DREQ_RECEIVED:
- case IB_CM_DREP_RECEIVED:
- if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
- RDMA_CM_DISCONNECT))
- goto out;
- event.event = RDMA_CM_EVENT_DISCONNECTED;
- break;
- case IB_CM_TIMEWAIT_EXIT:
- event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
- break;
- case IB_CM_MRA_RECEIVED:
- /* ignore event */
- goto out;
- case IB_CM_REJ_RECEIVED:
- pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
- ib_event->param.rej_rcvd.reason));
- cma_modify_qp_err(id_priv);
- event.status = ib_event->param.rej_rcvd.reason;
- event.event = RDMA_CM_EVENT_REJECTED;
- event.param.conn.private_data = ib_event->private_data;
- event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
- break;
- default:
- pr_err("RDMA CMA: unexpected IB CM event: %d\n",
- ib_event->event);
- goto out;
- }
- ret = cma_cm_event_handler(id_priv, &event);
- if (ret) {
- /* Destroy the CM ID by returning a non-zero value. */
- id_priv->cm_id.ib = NULL;
- destroy_id_handler_unlock(id_priv);
- return ret;
- }
- out:
- mutex_unlock(&id_priv->handler_mutex);
- return 0;
- }
- static struct rdma_id_private *
- cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
- const struct ib_cm_event *ib_event,
- struct net_device *net_dev)
- {
- struct rdma_id_private *listen_id_priv;
- struct rdma_id_private *id_priv;
- struct rdma_cm_id *id;
- struct rdma_route *rt;
- const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
- struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
- const __be64 service_id =
- ib_event->param.req_rcvd.primary_path->service_id;
- int ret;
- listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
- id_priv = __rdma_create_id(listen_id->route.addr.dev_addr.net,
- listen_id->event_handler, listen_id->context,
- listen_id->ps,
- ib_event->param.req_rcvd.qp_type,
- listen_id_priv);
- if (IS_ERR(id_priv))
- return NULL;
- id = &id_priv->id;
- if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
- (struct sockaddr *)&id->route.addr.dst_addr,
- listen_id, ib_event, ss_family, service_id))
- goto err;
- rt = &id->route;
- rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
- rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
- GFP_KERNEL);
- if (!rt->path_rec)
- goto err;
- rt->path_rec[0] = *path;
- if (rt->num_paths == 2)
- rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
- if (net_dev) {
- rdma_copy_src_l2_addr(&rt->addr.dev_addr, net_dev);
- } else {
- if (!cma_protocol_roce(listen_id) &&
- cma_any_addr(cma_src_addr(id_priv))) {
- rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
- rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
- ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
- } else if (!cma_any_addr(cma_src_addr(id_priv))) {
- ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
- if (ret)
- goto err;
- }
- }
- rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
- id_priv->state = RDMA_CM_CONNECT;
- return id_priv;
- err:
- rdma_destroy_id(id);
- return NULL;
- }
- static struct rdma_id_private *
- cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
- const struct ib_cm_event *ib_event,
- struct net_device *net_dev)
- {
- const struct rdma_id_private *listen_id_priv;
- struct rdma_id_private *id_priv;
- struct rdma_cm_id *id;
- const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
- struct net *net = listen_id->route.addr.dev_addr.net;
- int ret;
- listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
- id_priv = __rdma_create_id(net, listen_id->event_handler,
- listen_id->context, listen_id->ps, IB_QPT_UD,
- listen_id_priv);
- if (IS_ERR(id_priv))
- return NULL;
- id = &id_priv->id;
- if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
- (struct sockaddr *)&id->route.addr.dst_addr,
- listen_id, ib_event, ss_family,
- ib_event->param.sidr_req_rcvd.service_id))
- goto err;
- if (net_dev) {
- rdma_copy_src_l2_addr(&id->route.addr.dev_addr, net_dev);
- } else {
- if (!cma_any_addr(cma_src_addr(id_priv))) {
- ret = cma_translate_addr(cma_src_addr(id_priv),
- &id->route.addr.dev_addr);
- if (ret)
- goto err;
- }
- }
- id_priv->state = RDMA_CM_CONNECT;
- return id_priv;
- err:
- rdma_destroy_id(id);
- return NULL;
- }
- static void cma_set_req_event_data(struct rdma_cm_event *event,
- const struct ib_cm_req_event_param *req_data,
- void *private_data, int offset)
- {
- event->param.conn.private_data = private_data + offset;
- event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
- event->param.conn.responder_resources = req_data->responder_resources;
- event->param.conn.initiator_depth = req_data->initiator_depth;
- event->param.conn.flow_control = req_data->flow_control;
- event->param.conn.retry_count = req_data->retry_count;
- event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
- event->param.conn.srq = req_data->srq;
- event->param.conn.qp_num = req_data->remote_qpn;
- event->ece.vendor_id = req_data->ece.vendor_id;
- event->ece.attr_mod = req_data->ece.attr_mod;
- }
- static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
- const struct ib_cm_event *ib_event)
- {
- return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
- (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
- ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
- (id->qp_type == IB_QPT_UD)) ||
- (!id->qp_type));
- }
- static int cma_ib_req_handler(struct ib_cm_id *cm_id,
- const struct ib_cm_event *ib_event)
- {
- struct rdma_id_private *listen_id, *conn_id = NULL;
- struct rdma_cm_event event = {};
- struct cma_req_info req = {};
- struct net_device *net_dev;
- u8 offset;
- int ret;
- listen_id = cma_ib_id_from_event(cm_id, ib_event, &req, &net_dev);
- if (IS_ERR(listen_id))
- return PTR_ERR(listen_id);
- trace_cm_req_handler(listen_id, ib_event->event);
- if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
- ret = -EINVAL;
- goto net_dev_put;
- }
- mutex_lock(&listen_id->handler_mutex);
- if (READ_ONCE(listen_id->state) != RDMA_CM_LISTEN) {
- ret = -ECONNABORTED;
- goto err_unlock;
- }
- offset = cma_user_data_offset(listen_id);
- event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
- if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
- conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
- event.param.ud.private_data = ib_event->private_data + offset;
- event.param.ud.private_data_len =
- IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
- } else {
- conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
- cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
- ib_event->private_data, offset);
- }
- if (!conn_id) {
- ret = -ENOMEM;
- goto err_unlock;
- }
- mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
- ret = cma_ib_acquire_dev(conn_id, listen_id, &req);
- if (ret) {
- destroy_id_handler_unlock(conn_id);
- goto err_unlock;
- }
- conn_id->cm_id.ib = cm_id;
- cm_id->context = conn_id;
- cm_id->cm_handler = cma_ib_handler;
- ret = cma_cm_event_handler(conn_id, &event);
- if (ret) {
- /* Destroy the CM ID by returning a non-zero value. */
- conn_id->cm_id.ib = NULL;
- mutex_unlock(&listen_id->handler_mutex);
- destroy_id_handler_unlock(conn_id);
- goto net_dev_put;
- }
- if (READ_ONCE(conn_id->state) == RDMA_CM_CONNECT &&
- conn_id->id.qp_type != IB_QPT_UD) {
- trace_cm_send_mra(cm_id->context);
- ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
- }
- mutex_unlock(&conn_id->handler_mutex);
- err_unlock:
- mutex_unlock(&listen_id->handler_mutex);
- net_dev_put:
- if (net_dev)
- dev_put(net_dev);
- return ret;
- }
- __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
- {
- if (addr->sa_family == AF_IB)
- return ((struct sockaddr_ib *) addr)->sib_sid;
- return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
- }
- EXPORT_SYMBOL(rdma_get_service_id);
- void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
- union ib_gid *dgid)
- {
- struct rdma_addr *addr = &cm_id->route.addr;
- if (!cm_id->device) {
- if (sgid)
- memset(sgid, 0, sizeof(*sgid));
- if (dgid)
- memset(dgid, 0, sizeof(*dgid));
- return;
- }
- if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
- if (sgid)
- rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
- if (dgid)
- rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
- } else {
- if (sgid)
- rdma_addr_get_sgid(&addr->dev_addr, sgid);
- if (dgid)
- rdma_addr_get_dgid(&addr->dev_addr, dgid);
- }
- }
- EXPORT_SYMBOL(rdma_read_gids);
- static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
- {
- struct rdma_id_private *id_priv = iw_id->context;
- struct rdma_cm_event event = {};
- int ret = 0;
- struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
- struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
- mutex_lock(&id_priv->handler_mutex);
- if (READ_ONCE(id_priv->state) != RDMA_CM_CONNECT)
- goto out;
- switch (iw_event->event) {
- case IW_CM_EVENT_CLOSE:
- event.event = RDMA_CM_EVENT_DISCONNECTED;
- break;
- case IW_CM_EVENT_CONNECT_REPLY:
- memcpy(cma_src_addr(id_priv), laddr,
- rdma_addr_size(laddr));
- memcpy(cma_dst_addr(id_priv), raddr,
- rdma_addr_size(raddr));
- switch (iw_event->status) {
- case 0:
- event.event = RDMA_CM_EVENT_ESTABLISHED;
- event.param.conn.initiator_depth = iw_event->ird;
- event.param.conn.responder_resources = iw_event->ord;
- break;
- case -ECONNRESET:
- case -ECONNREFUSED:
- event.event = RDMA_CM_EVENT_REJECTED;
- break;
- case -ETIMEDOUT:
- event.event = RDMA_CM_EVENT_UNREACHABLE;
- break;
- default:
- event.event = RDMA_CM_EVENT_CONNECT_ERROR;
- break;
- }
- break;
- case IW_CM_EVENT_ESTABLISHED:
- event.event = RDMA_CM_EVENT_ESTABLISHED;
- event.param.conn.initiator_depth = iw_event->ird;
- event.param.conn.responder_resources = iw_event->ord;
- break;
- default:
- goto out;
- }
- event.status = iw_event->status;
- event.param.conn.private_data = iw_event->private_data;
- event.param.conn.private_data_len = iw_event->private_data_len;
- ret = cma_cm_event_handler(id_priv, &event);
- if (ret) {
- /* Destroy the CM ID by returning a non-zero value. */
- id_priv->cm_id.iw = NULL;
- destroy_id_handler_unlock(id_priv);
- return ret;
- }
- out:
- mutex_unlock(&id_priv->handler_mutex);
- return ret;
- }
- static int iw_conn_req_handler(struct iw_cm_id *cm_id,
- struct iw_cm_event *iw_event)
- {
- struct rdma_id_private *listen_id, *conn_id;
- struct rdma_cm_event event = {};
- int ret = -ECONNABORTED;
- struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
- struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
- event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
- event.param.conn.private_data = iw_event->private_data;
- event.param.conn.private_data_len = iw_event->private_data_len;
- event.param.conn.initiator_depth = iw_event->ird;
- event.param.conn.responder_resources = iw_event->ord;
- listen_id = cm_id->context;
- mutex_lock(&listen_id->handler_mutex);
- if (READ_ONCE(listen_id->state) != RDMA_CM_LISTEN)
- goto out;
- /* Create a new RDMA id for the new IW CM ID */
- conn_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
- listen_id->id.event_handler,
- listen_id->id.context, RDMA_PS_TCP,
- IB_QPT_RC, listen_id);
- if (IS_ERR(conn_id)) {
- ret = -ENOMEM;
- goto out;
- }
- mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
- conn_id->state = RDMA_CM_CONNECT;
- ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
- if (ret) {
- mutex_unlock(&listen_id->handler_mutex);
- destroy_id_handler_unlock(conn_id);
- return ret;
- }
- ret = cma_iw_acquire_dev(conn_id, listen_id);
- if (ret) {
- mutex_unlock(&listen_id->handler_mutex);
- destroy_id_handler_unlock(conn_id);
- return ret;
- }
- conn_id->cm_id.iw = cm_id;
- cm_id->context = conn_id;
- cm_id->cm_handler = cma_iw_handler;
- memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
- memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
- ret = cma_cm_event_handler(conn_id, &event);
- if (ret) {
- /* User wants to destroy the CM ID */
- conn_id->cm_id.iw = NULL;
- mutex_unlock(&listen_id->handler_mutex);
- destroy_id_handler_unlock(conn_id);
- return ret;
- }
- mutex_unlock(&conn_id->handler_mutex);
- out:
- mutex_unlock(&listen_id->handler_mutex);
- return ret;
- }
- static int cma_ib_listen(struct rdma_id_private *id_priv)
- {
- struct sockaddr *addr;
- struct ib_cm_id *id;
- __be64 svc_id;
- addr = cma_src_addr(id_priv);
- svc_id = rdma_get_service_id(&id_priv->id, addr);
- id = ib_cm_insert_listen(id_priv->id.device,
- cma_ib_req_handler, svc_id);
- if (IS_ERR(id))
- return PTR_ERR(id);
- id_priv->cm_id.ib = id;
- return 0;
- }
- static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
- {
- int ret;
- struct iw_cm_id *id;
- id = iw_create_cm_id(id_priv->id.device,
- iw_conn_req_handler,
- id_priv);
- if (IS_ERR(id))
- return PTR_ERR(id);
- mutex_lock(&id_priv->qp_mutex);
- id->tos = id_priv->tos;
- id->tos_set = id_priv->tos_set;
- mutex_unlock(&id_priv->qp_mutex);
- id_priv->cm_id.iw = id;
- memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
- rdma_addr_size(cma_src_addr(id_priv)));
- ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
- if (ret) {
- iw_destroy_cm_id(id_priv->cm_id.iw);
- id_priv->cm_id.iw = NULL;
- }
- return ret;
- }
- static int cma_listen_handler(struct rdma_cm_id *id,
- struct rdma_cm_event *event)
- {
- struct rdma_id_private *id_priv = id->context;
- /* Listening IDs are always destroyed on removal */
- if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
- return -1;
- id->context = id_priv->id.context;
- id->event_handler = id_priv->id.event_handler;
- trace_cm_event_handler(id_priv, event);
- return id_priv->id.event_handler(id, event);
- }
- static int cma_listen_on_dev(struct rdma_id_private *id_priv,
- struct cma_device *cma_dev,
- struct rdma_id_private **to_destroy)
- {
- struct rdma_id_private *dev_id_priv;
- struct net *net = id_priv->id.route.addr.dev_addr.net;
- int ret;
- lockdep_assert_held(&lock);
- *to_destroy = NULL;
- if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
- return 0;
- dev_id_priv =
- __rdma_create_id(net, cma_listen_handler, id_priv,
- id_priv->id.ps, id_priv->id.qp_type, id_priv);
- if (IS_ERR(dev_id_priv))
- return PTR_ERR(dev_id_priv);
- dev_id_priv->state = RDMA_CM_ADDR_BOUND;
- memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
- rdma_addr_size(cma_src_addr(id_priv)));
- _cma_attach_to_dev(dev_id_priv, cma_dev);
- rdma_restrack_add(&dev_id_priv->res);
- cma_id_get(id_priv);
- dev_id_priv->internal_id = 1;
- dev_id_priv->afonly = id_priv->afonly;
- mutex_lock(&id_priv->qp_mutex);
- dev_id_priv->tos_set = id_priv->tos_set;
- dev_id_priv->tos = id_priv->tos;
- mutex_unlock(&id_priv->qp_mutex);
- ret = rdma_listen(&dev_id_priv->id, id_priv->backlog);
- if (ret)
- goto err_listen;
- list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
- return 0;
- err_listen:
- /* Caller must destroy this after releasing lock */
- *to_destroy = dev_id_priv;
- dev_warn(&cma_dev->device->dev, "RDMA CMA: %s, error %d\n", __func__, ret);
- return ret;
- }
- static int cma_listen_on_all(struct rdma_id_private *id_priv)
- {
- struct rdma_id_private *to_destroy;
- struct cma_device *cma_dev;
- int ret;
- mutex_lock(&lock);
- list_add_tail(&id_priv->list, &listen_any_list);
- list_for_each_entry(cma_dev, &dev_list, list) {
- ret = cma_listen_on_dev(id_priv, cma_dev, &to_destroy);
- if (ret) {
- /* Prevent racing with cma_process_remove() */
- if (to_destroy)
- list_del_init(&to_destroy->list);
- goto err_listen;
- }
- }
- mutex_unlock(&lock);
- return 0;
- err_listen:
- _cma_cancel_listens(id_priv);
- mutex_unlock(&lock);
- if (to_destroy)
- rdma_destroy_id(&to_destroy->id);
- return ret;
- }
- void rdma_set_service_type(struct rdma_cm_id *id, int tos)
- {
- struct rdma_id_private *id_priv;
- id_priv = container_of(id, struct rdma_id_private, id);
- mutex_lock(&id_priv->qp_mutex);
- id_priv->tos = (u8) tos;
- id_priv->tos_set = true;
- mutex_unlock(&id_priv->qp_mutex);
- }
- EXPORT_SYMBOL(rdma_set_service_type);
- /**
- * rdma_set_ack_timeout() - Set the ack timeout of QP associated
- * with a connection identifier.
- * @id: Communication identifier to associated with service type.
- * @timeout: Ack timeout to set a QP, expressed as 4.096 * 2^(timeout) usec.
- *
- * This function should be called before rdma_connect() on active side,
- * and on passive side before rdma_accept(). It is applicable to primary
- * path only. The timeout will affect the local side of the QP, it is not
- * negotiated with remote side and zero disables the timer. In case it is
- * set before rdma_resolve_route, the value will also be used to determine
- * PacketLifeTime for RoCE.
- *
- * Return: 0 for success
- */
- int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
- {
- struct rdma_id_private *id_priv;
- if (id->qp_type != IB_QPT_RC && id->qp_type != IB_QPT_XRC_INI)
- return -EINVAL;
- id_priv = container_of(id, struct rdma_id_private, id);
- mutex_lock(&id_priv->qp_mutex);
- id_priv->timeout = timeout;
- id_priv->timeout_set = true;
- mutex_unlock(&id_priv->qp_mutex);
- return 0;
- }
- EXPORT_SYMBOL(rdma_set_ack_timeout);
- static void cma_query_handler(int status, struct sa_path_rec *path_rec,
- void *context)
- {
- struct cma_work *work = context;
- struct rdma_route *route;
- route = &work->id->id.route;
- if (!status) {
- route->num_paths = 1;
- *route->path_rec = *path_rec;
- } else {
- work->old_state = RDMA_CM_ROUTE_QUERY;
- work->new_state = RDMA_CM_ADDR_RESOLVED;
- work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
- work->event.status = status;
- pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
- status);
- }
- queue_work(cma_wq, &work->work);
- }
- static int cma_query_ib_route(struct rdma_id_private *id_priv,
- unsigned long timeout_ms, struct cma_work *work)
- {
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- struct sa_path_rec path_rec;
- ib_sa_comp_mask comp_mask;
- struct sockaddr_in6 *sin6;
- struct sockaddr_ib *sib;
- memset(&path_rec, 0, sizeof path_rec);
- if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
- path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
- else
- path_rec.rec_type = SA_PATH_REC_TYPE_IB;
- rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
- rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
- path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
- path_rec.numb_path = 1;
- path_rec.reversible = 1;
- path_rec.service_id = rdma_get_service_id(&id_priv->id,
- cma_dst_addr(id_priv));
- comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
- IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
- IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
- switch (cma_family(id_priv)) {
- case AF_INET:
- path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
- comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
- break;
- case AF_INET6:
- sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
- path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
- comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
- break;
- case AF_IB:
- sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
- path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
- comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
- break;
- }
- id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
- id_priv->id.port_num, &path_rec,
- comp_mask, timeout_ms,
- GFP_KERNEL, cma_query_handler,
- work, &id_priv->query);
- return (id_priv->query_id < 0) ? id_priv->query_id : 0;
- }
- static void cma_iboe_join_work_handler(struct work_struct *work)
- {
- struct cma_multicast *mc =
- container_of(work, struct cma_multicast, iboe_join.work);
- struct rdma_cm_event *event = &mc->iboe_join.event;
- struct rdma_id_private *id_priv = mc->id_priv;
- int ret;
- mutex_lock(&id_priv->handler_mutex);
- if (READ_ONCE(id_priv->state) == RDMA_CM_DESTROYING ||
- READ_ONCE(id_priv->state) == RDMA_CM_DEVICE_REMOVAL)
- goto out_unlock;
- ret = cma_cm_event_handler(id_priv, event);
- WARN_ON(ret);
- out_unlock:
- mutex_unlock(&id_priv->handler_mutex);
- if (event->event == RDMA_CM_EVENT_MULTICAST_JOIN)
- rdma_destroy_ah_attr(&event->param.ud.ah_attr);
- }
- static void cma_work_handler(struct work_struct *_work)
- {
- struct cma_work *work = container_of(_work, struct cma_work, work);
- struct rdma_id_private *id_priv = work->id;
- mutex_lock(&id_priv->handler_mutex);
- if (READ_ONCE(id_priv->state) == RDMA_CM_DESTROYING ||
- READ_ONCE(id_priv->state) == RDMA_CM_DEVICE_REMOVAL)
- goto out_unlock;
- if (work->old_state != 0 || work->new_state != 0) {
- if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
- goto out_unlock;
- }
- if (cma_cm_event_handler(id_priv, &work->event)) {
- cma_id_put(id_priv);
- destroy_id_handler_unlock(id_priv);
- goto out_free;
- }
- out_unlock:
- mutex_unlock(&id_priv->handler_mutex);
- cma_id_put(id_priv);
- out_free:
- if (work->event.event == RDMA_CM_EVENT_MULTICAST_JOIN)
- rdma_destroy_ah_attr(&work->event.param.ud.ah_attr);
- kfree(work);
- }
- static void cma_init_resolve_route_work(struct cma_work *work,
- struct rdma_id_private *id_priv)
- {
- work->id = id_priv;
- INIT_WORK(&work->work, cma_work_handler);
- work->old_state = RDMA_CM_ROUTE_QUERY;
- work->new_state = RDMA_CM_ROUTE_RESOLVED;
- work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
- }
- static void enqueue_resolve_addr_work(struct cma_work *work,
- struct rdma_id_private *id_priv)
- {
- /* Balances with cma_id_put() in cma_work_handler */
- cma_id_get(id_priv);
- work->id = id_priv;
- INIT_WORK(&work->work, cma_work_handler);
- work->old_state = RDMA_CM_ADDR_QUERY;
- work->new_state = RDMA_CM_ADDR_RESOLVED;
- work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
- queue_work(cma_wq, &work->work);
- }
- static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
- unsigned long timeout_ms)
- {
- struct rdma_route *route = &id_priv->id.route;
- struct cma_work *work;
- int ret;
- work = kzalloc(sizeof *work, GFP_KERNEL);
- if (!work)
- return -ENOMEM;
- cma_init_resolve_route_work(work, id_priv);
- if (!route->path_rec)
- route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
- if (!route->path_rec) {
- ret = -ENOMEM;
- goto err1;
- }
- ret = cma_query_ib_route(id_priv, timeout_ms, work);
- if (ret)
- goto err2;
- return 0;
- err2:
- kfree(route->path_rec);
- route->path_rec = NULL;
- err1:
- kfree(work);
- return ret;
- }
- static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
- unsigned long supported_gids,
- enum ib_gid_type default_gid)
- {
- if ((network_type == RDMA_NETWORK_IPV4 ||
- network_type == RDMA_NETWORK_IPV6) &&
- test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
- return IB_GID_TYPE_ROCE_UDP_ENCAP;
- return default_gid;
- }
- /*
- * cma_iboe_set_path_rec_l2_fields() is helper function which sets
- * path record type based on GID type.
- * It also sets up other L2 fields which includes destination mac address
- * netdev ifindex, of the path record.
- * It returns the netdev of the bound interface for this path record entry.
- */
- static struct net_device *
- cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
- {
- struct rdma_route *route = &id_priv->id.route;
- enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
- struct rdma_addr *addr = &route->addr;
- unsigned long supported_gids;
- struct net_device *ndev;
- if (!addr->dev_addr.bound_dev_if)
- return NULL;
- ndev = dev_get_by_index(addr->dev_addr.net,
- addr->dev_addr.bound_dev_if);
- if (!ndev)
- return NULL;
- supported_gids = roce_gid_type_mask_support(id_priv->id.device,
- id_priv->id.port_num);
- gid_type = cma_route_gid_type(addr->dev_addr.network,
- supported_gids,
- id_priv->gid_type);
- /* Use the hint from IP Stack to select GID Type */
- if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
- gid_type = ib_network_to_gid_type(addr->dev_addr.network);
- route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
- route->path_rec->roce.route_resolved = true;
- sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
- return ndev;
- }
- int rdma_set_ib_path(struct rdma_cm_id *id,
- struct sa_path_rec *path_rec)
- {
- struct rdma_id_private *id_priv;
- struct net_device *ndev;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
- RDMA_CM_ROUTE_RESOLVED))
- return -EINVAL;
- id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
- GFP_KERNEL);
- if (!id->route.path_rec) {
- ret = -ENOMEM;
- goto err;
- }
- if (rdma_protocol_roce(id->device, id->port_num)) {
- ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
- if (!ndev) {
- ret = -ENODEV;
- goto err_free;
- }
- dev_put(ndev);
- }
- id->route.num_paths = 1;
- return 0;
- err_free:
- kfree(id->route.path_rec);
- id->route.path_rec = NULL;
- err:
- cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
- return ret;
- }
- EXPORT_SYMBOL(rdma_set_ib_path);
- static int cma_resolve_iw_route(struct rdma_id_private *id_priv)
- {
- struct cma_work *work;
- work = kzalloc(sizeof *work, GFP_KERNEL);
- if (!work)
- return -ENOMEM;
- cma_init_resolve_route_work(work, id_priv);
- queue_work(cma_wq, &work->work);
- return 0;
- }
- static int get_vlan_ndev_tc(struct net_device *vlan_ndev, int prio)
- {
- struct net_device *dev;
- dev = vlan_dev_real_dev(vlan_ndev);
- if (dev->num_tc)
- return netdev_get_prio_tc_map(dev, prio);
- return (vlan_dev_get_egress_qos_mask(vlan_ndev, prio) &
- VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
- }
- struct iboe_prio_tc_map {
- int input_prio;
- int output_tc;
- bool found;
- };
- static int get_lower_vlan_dev_tc(struct net_device *dev,
- struct netdev_nested_priv *priv)
- {
- struct iboe_prio_tc_map *map = (struct iboe_prio_tc_map *)priv->data;
- if (is_vlan_dev(dev))
- map->output_tc = get_vlan_ndev_tc(dev, map->input_prio);
- else if (dev->num_tc)
- map->output_tc = netdev_get_prio_tc_map(dev, map->input_prio);
- else
- map->output_tc = 0;
- /* We are interested only in first level VLAN device, so always
- * return 1 to stop iterating over next level devices.
- */
- map->found = true;
- return 1;
- }
- static int iboe_tos_to_sl(struct net_device *ndev, int tos)
- {
- struct iboe_prio_tc_map prio_tc_map = {};
- int prio = rt_tos2priority(tos);
- struct netdev_nested_priv priv;
- /* If VLAN device, get it directly from the VLAN netdev */
- if (is_vlan_dev(ndev))
- return get_vlan_ndev_tc(ndev, prio);
- prio_tc_map.input_prio = prio;
- priv.data = (void *)&prio_tc_map;
- rcu_read_lock();
- netdev_walk_all_lower_dev_rcu(ndev,
- get_lower_vlan_dev_tc,
- &priv);
- rcu_read_unlock();
- /* If map is found from lower device, use it; Otherwise
- * continue with the current netdevice to get priority to tc map.
- */
- if (prio_tc_map.found)
- return prio_tc_map.output_tc;
- else if (ndev->num_tc)
- return netdev_get_prio_tc_map(ndev, prio);
- else
- return 0;
- }
- static __be32 cma_get_roce_udp_flow_label(struct rdma_id_private *id_priv)
- {
- struct sockaddr_in6 *addr6;
- u16 dport, sport;
- u32 hash, fl;
- addr6 = (struct sockaddr_in6 *)cma_src_addr(id_priv);
- fl = be32_to_cpu(addr6->sin6_flowinfo) & IB_GRH_FLOWLABEL_MASK;
- if ((cma_family(id_priv) != AF_INET6) || !fl) {
- dport = be16_to_cpu(cma_port(cma_dst_addr(id_priv)));
- sport = be16_to_cpu(cma_port(cma_src_addr(id_priv)));
- hash = (u32)sport * 31 + dport;
- fl = hash & IB_GRH_FLOWLABEL_MASK;
- }
- return cpu_to_be32(fl);
- }
- static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
- {
- struct rdma_route *route = &id_priv->id.route;
- struct rdma_addr *addr = &route->addr;
- struct cma_work *work;
- int ret;
- struct net_device *ndev;
- u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
- rdma_start_port(id_priv->cma_dev->device)];
- u8 tos;
- mutex_lock(&id_priv->qp_mutex);
- tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
- mutex_unlock(&id_priv->qp_mutex);
- work = kzalloc(sizeof *work, GFP_KERNEL);
- if (!work)
- return -ENOMEM;
- route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
- if (!route->path_rec) {
- ret = -ENOMEM;
- goto err1;
- }
- route->num_paths = 1;
- ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
- if (!ndev) {
- ret = -ENODEV;
- goto err2;
- }
- rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
- &route->path_rec->sgid);
- rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
- &route->path_rec->dgid);
- if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
- /* TODO: get the hoplimit from the inet/inet6 device */
- route->path_rec->hop_limit = addr->dev_addr.hoplimit;
- else
- route->path_rec->hop_limit = 1;
- route->path_rec->reversible = 1;
- route->path_rec->pkey = cpu_to_be16(0xffff);
- route->path_rec->mtu_selector = IB_SA_EQ;
- route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
- route->path_rec->traffic_class = tos;
- route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
- route->path_rec->rate_selector = IB_SA_EQ;
- route->path_rec->rate = iboe_get_rate(ndev);
- dev_put(ndev);
- route->path_rec->packet_life_time_selector = IB_SA_EQ;
- /* In case ACK timeout is set, use this value to calculate
- * PacketLifeTime. As per IBTA 12.7.34,
- * local ACK timeout = (2 * PacketLifeTime + Local CA’s ACK delay).
- * Assuming a negligible local ACK delay, we can use
- * PacketLifeTime = local ACK timeout/2
- * as a reasonable approximation for RoCE networks.
- */
- mutex_lock(&id_priv->qp_mutex);
- if (id_priv->timeout_set && id_priv->timeout)
- route->path_rec->packet_life_time = id_priv->timeout - 1;
- else
- route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
- mutex_unlock(&id_priv->qp_mutex);
- if (!route->path_rec->mtu) {
- ret = -EINVAL;
- goto err2;
- }
- if (rdma_protocol_roce_udp_encap(id_priv->id.device,
- id_priv->id.port_num))
- route->path_rec->flow_label =
- cma_get_roce_udp_flow_label(id_priv);
- cma_init_resolve_route_work(work, id_priv);
- queue_work(cma_wq, &work->work);
- return 0;
- err2:
- kfree(route->path_rec);
- route->path_rec = NULL;
- route->num_paths = 0;
- err1:
- kfree(work);
- return ret;
- }
- int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
- {
- struct rdma_id_private *id_priv;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
- return -EINVAL;
- cma_id_get(id_priv);
- if (rdma_cap_ib_sa(id->device, id->port_num))
- ret = cma_resolve_ib_route(id_priv, timeout_ms);
- else if (rdma_protocol_roce(id->device, id->port_num))
- ret = cma_resolve_iboe_route(id_priv);
- else if (rdma_protocol_iwarp(id->device, id->port_num))
- ret = cma_resolve_iw_route(id_priv);
- else
- ret = -ENOSYS;
- if (ret)
- goto err;
- return 0;
- err:
- cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
- cma_id_put(id_priv);
- return ret;
- }
- EXPORT_SYMBOL(rdma_resolve_route);
- static void cma_set_loopback(struct sockaddr *addr)
- {
- switch (addr->sa_family) {
- case AF_INET:
- ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
- break;
- case AF_INET6:
- ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
- 0, 0, 0, htonl(1));
- break;
- default:
- ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
- 0, 0, 0, htonl(1));
- break;
- }
- }
- static int cma_bind_loopback(struct rdma_id_private *id_priv)
- {
- struct cma_device *cma_dev, *cur_dev;
- union ib_gid gid;
- enum ib_port_state port_state;
- unsigned int p;
- u16 pkey;
- int ret;
- cma_dev = NULL;
- mutex_lock(&lock);
- list_for_each_entry(cur_dev, &dev_list, list) {
- if (cma_family(id_priv) == AF_IB &&
- !rdma_cap_ib_cm(cur_dev->device, 1))
- continue;
- if (!cma_dev)
- cma_dev = cur_dev;
- rdma_for_each_port (cur_dev->device, p) {
- if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
- port_state == IB_PORT_ACTIVE) {
- cma_dev = cur_dev;
- goto port_found;
- }
- }
- }
- if (!cma_dev) {
- ret = -ENODEV;
- goto out;
- }
- p = 1;
- port_found:
- ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
- if (ret)
- goto out;
- ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
- if (ret)
- goto out;
- id_priv->id.route.addr.dev_addr.dev_type =
- (rdma_protocol_ib(cma_dev->device, p)) ?
- ARPHRD_INFINIBAND : ARPHRD_ETHER;
- rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
- ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
- id_priv->id.port_num = p;
- cma_attach_to_dev(id_priv, cma_dev);
- rdma_restrack_add(&id_priv->res);
- cma_set_loopback(cma_src_addr(id_priv));
- out:
- mutex_unlock(&lock);
- return ret;
- }
- static void addr_handler(int status, struct sockaddr *src_addr,
- struct rdma_dev_addr *dev_addr, void *context)
- {
- struct rdma_id_private *id_priv = context;
- struct rdma_cm_event event = {};
- struct sockaddr *addr;
- struct sockaddr_storage old_addr;
- mutex_lock(&id_priv->handler_mutex);
- if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
- RDMA_CM_ADDR_RESOLVED))
- goto out;
- /*
- * Store the previous src address, so that if we fail to acquire
- * matching rdma device, old address can be restored back, which helps
- * to cancel the cma listen operation correctly.
- */
- addr = cma_src_addr(id_priv);
- memcpy(&old_addr, addr, rdma_addr_size(addr));
- memcpy(addr, src_addr, rdma_addr_size(src_addr));
- if (!status && !id_priv->cma_dev) {
- status = cma_acquire_dev_by_src_ip(id_priv);
- if (status)
- pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
- status);
- rdma_restrack_add(&id_priv->res);
- } else if (status) {
- pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
- }
- if (status) {
- memcpy(addr, &old_addr,
- rdma_addr_size((struct sockaddr *)&old_addr));
- if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
- RDMA_CM_ADDR_BOUND))
- goto out;
- event.event = RDMA_CM_EVENT_ADDR_ERROR;
- event.status = status;
- } else
- event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
- if (cma_cm_event_handler(id_priv, &event)) {
- destroy_id_handler_unlock(id_priv);
- return;
- }
- out:
- mutex_unlock(&id_priv->handler_mutex);
- }
- static int cma_resolve_loopback(struct rdma_id_private *id_priv)
- {
- struct cma_work *work;
- union ib_gid gid;
- int ret;
- work = kzalloc(sizeof *work, GFP_KERNEL);
- if (!work)
- return -ENOMEM;
- if (!id_priv->cma_dev) {
- ret = cma_bind_loopback(id_priv);
- if (ret)
- goto err;
- }
- rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
- rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
- enqueue_resolve_addr_work(work, id_priv);
- return 0;
- err:
- kfree(work);
- return ret;
- }
- static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
- {
- struct cma_work *work;
- int ret;
- work = kzalloc(sizeof *work, GFP_KERNEL);
- if (!work)
- return -ENOMEM;
- if (!id_priv->cma_dev) {
- ret = cma_resolve_ib_dev(id_priv);
- if (ret)
- goto err;
- }
- rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
- &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
- enqueue_resolve_addr_work(work, id_priv);
- return 0;
- err:
- kfree(work);
- return ret;
- }
- static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
- const struct sockaddr *dst_addr)
- {
- struct sockaddr_storage zero_sock = {};
- if (src_addr && src_addr->sa_family)
- return rdma_bind_addr(id, src_addr);
- /*
- * When the src_addr is not specified, automatically supply an any addr
- */
- zero_sock.ss_family = dst_addr->sa_family;
- if (IS_ENABLED(CONFIG_IPV6) && dst_addr->sa_family == AF_INET6) {
- struct sockaddr_in6 *src_addr6 =
- (struct sockaddr_in6 *)&zero_sock;
- struct sockaddr_in6 *dst_addr6 =
- (struct sockaddr_in6 *)dst_addr;
- src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
- if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
- id->route.addr.dev_addr.bound_dev_if =
- dst_addr6->sin6_scope_id;
- } else if (dst_addr->sa_family == AF_IB) {
- ((struct sockaddr_ib *)&zero_sock)->sib_pkey =
- ((struct sockaddr_ib *)dst_addr)->sib_pkey;
- }
- return rdma_bind_addr(id, (struct sockaddr *)&zero_sock);
- }
- /*
- * If required, resolve the source address for bind and leave the id_priv in
- * state RDMA_CM_ADDR_BOUND. This oddly uses the state to determine the prior
- * calls made by ULP, a previously bound ID will not be re-bound and src_addr is
- * ignored.
- */
- static int resolve_prepare_src(struct rdma_id_private *id_priv,
- struct sockaddr *src_addr,
- const struct sockaddr *dst_addr)
- {
- int ret;
- memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
- if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
- /* For a well behaved ULP state will be RDMA_CM_IDLE */
- ret = cma_bind_addr(&id_priv->id, src_addr, dst_addr);
- if (ret)
- goto err_dst;
- if (WARN_ON(!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND,
- RDMA_CM_ADDR_QUERY))) {
- ret = -EINVAL;
- goto err_dst;
- }
- }
- if (cma_family(id_priv) != dst_addr->sa_family) {
- ret = -EINVAL;
- goto err_state;
- }
- return 0;
- err_state:
- cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
- err_dst:
- memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
- return ret;
- }
- int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
- const struct sockaddr *dst_addr, unsigned long timeout_ms)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- int ret;
- ret = resolve_prepare_src(id_priv, src_addr, dst_addr);
- if (ret)
- return ret;
- if (cma_any_addr(dst_addr)) {
- ret = cma_resolve_loopback(id_priv);
- } else {
- if (dst_addr->sa_family == AF_IB) {
- ret = cma_resolve_ib_addr(id_priv);
- } else {
- ret = rdma_resolve_ip(cma_src_addr(id_priv), dst_addr,
- &id->route.addr.dev_addr,
- timeout_ms, addr_handler,
- false, id_priv);
- }
- }
- if (ret)
- goto err;
- return 0;
- err:
- cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
- return ret;
- }
- EXPORT_SYMBOL(rdma_resolve_addr);
- int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
- {
- struct rdma_id_private *id_priv;
- unsigned long flags;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- spin_lock_irqsave(&id_priv->lock, flags);
- if ((reuse && id_priv->state != RDMA_CM_LISTEN) ||
- id_priv->state == RDMA_CM_IDLE) {
- id_priv->reuseaddr = reuse;
- ret = 0;
- } else {
- ret = -EINVAL;
- }
- spin_unlock_irqrestore(&id_priv->lock, flags);
- return ret;
- }
- EXPORT_SYMBOL(rdma_set_reuseaddr);
- int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
- {
- struct rdma_id_private *id_priv;
- unsigned long flags;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- spin_lock_irqsave(&id_priv->lock, flags);
- if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
- id_priv->options |= (1 << CMA_OPTION_AFONLY);
- id_priv->afonly = afonly;
- ret = 0;
- } else {
- ret = -EINVAL;
- }
- spin_unlock_irqrestore(&id_priv->lock, flags);
- return ret;
- }
- EXPORT_SYMBOL(rdma_set_afonly);
- static void cma_bind_port(struct rdma_bind_list *bind_list,
- struct rdma_id_private *id_priv)
- {
- struct sockaddr *addr;
- struct sockaddr_ib *sib;
- u64 sid, mask;
- __be16 port;
- lockdep_assert_held(&lock);
- addr = cma_src_addr(id_priv);
- port = htons(bind_list->port);
- switch (addr->sa_family) {
- case AF_INET:
- ((struct sockaddr_in *) addr)->sin_port = port;
- break;
- case AF_INET6:
- ((struct sockaddr_in6 *) addr)->sin6_port = port;
- break;
- case AF_IB:
- sib = (struct sockaddr_ib *) addr;
- sid = be64_to_cpu(sib->sib_sid);
- mask = be64_to_cpu(sib->sib_sid_mask);
- sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
- sib->sib_sid_mask = cpu_to_be64(~0ULL);
- break;
- }
- id_priv->bind_list = bind_list;
- hlist_add_head(&id_priv->node, &bind_list->owners);
- }
- static int cma_alloc_port(enum rdma_ucm_port_space ps,
- struct rdma_id_private *id_priv, unsigned short snum)
- {
- struct rdma_bind_list *bind_list;
- int ret;
- lockdep_assert_held(&lock);
- bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
- if (!bind_list)
- return -ENOMEM;
- ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
- snum);
- if (ret < 0)
- goto err;
- bind_list->ps = ps;
- bind_list->port = snum;
- cma_bind_port(bind_list, id_priv);
- return 0;
- err:
- kfree(bind_list);
- return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
- }
- static int cma_port_is_unique(struct rdma_bind_list *bind_list,
- struct rdma_id_private *id_priv)
- {
- struct rdma_id_private *cur_id;
- struct sockaddr *daddr = cma_dst_addr(id_priv);
- struct sockaddr *saddr = cma_src_addr(id_priv);
- __be16 dport = cma_port(daddr);
- lockdep_assert_held(&lock);
- hlist_for_each_entry(cur_id, &bind_list->owners, node) {
- struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
- struct sockaddr *cur_saddr = cma_src_addr(cur_id);
- __be16 cur_dport = cma_port(cur_daddr);
- if (id_priv == cur_id)
- continue;
- /* different dest port -> unique */
- if (!cma_any_port(daddr) &&
- !cma_any_port(cur_daddr) &&
- (dport != cur_dport))
- continue;
- /* different src address -> unique */
- if (!cma_any_addr(saddr) &&
- !cma_any_addr(cur_saddr) &&
- cma_addr_cmp(saddr, cur_saddr))
- continue;
- /* different dst address -> unique */
- if (!cma_any_addr(daddr) &&
- !cma_any_addr(cur_daddr) &&
- cma_addr_cmp(daddr, cur_daddr))
- continue;
- return -EADDRNOTAVAIL;
- }
- return 0;
- }
- static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
- struct rdma_id_private *id_priv)
- {
- static unsigned int last_used_port;
- int low, high, remaining;
- unsigned int rover;
- struct net *net = id_priv->id.route.addr.dev_addr.net;
- lockdep_assert_held(&lock);
- inet_get_local_port_range(net, &low, &high);
- remaining = (high - low) + 1;
- rover = prandom_u32() % remaining + low;
- retry:
- if (last_used_port != rover) {
- struct rdma_bind_list *bind_list;
- int ret;
- bind_list = cma_ps_find(net, ps, (unsigned short)rover);
- if (!bind_list) {
- ret = cma_alloc_port(ps, id_priv, rover);
- } else {
- ret = cma_port_is_unique(bind_list, id_priv);
- if (!ret)
- cma_bind_port(bind_list, id_priv);
- }
- /*
- * Remember previously used port number in order to avoid
- * re-using same port immediately after it is closed.
- */
- if (!ret)
- last_used_port = rover;
- if (ret != -EADDRNOTAVAIL)
- return ret;
- }
- if (--remaining) {
- rover++;
- if ((rover < low) || (rover > high))
- rover = low;
- goto retry;
- }
- return -EADDRNOTAVAIL;
- }
- /*
- * Check that the requested port is available. This is called when trying to
- * bind to a specific port, or when trying to listen on a bound port. In
- * the latter case, the provided id_priv may already be on the bind_list, but
- * we still need to check that it's okay to start listening.
- */
- static int cma_check_port(struct rdma_bind_list *bind_list,
- struct rdma_id_private *id_priv, uint8_t reuseaddr)
- {
- struct rdma_id_private *cur_id;
- struct sockaddr *addr, *cur_addr;
- lockdep_assert_held(&lock);
- addr = cma_src_addr(id_priv);
- hlist_for_each_entry(cur_id, &bind_list->owners, node) {
- if (id_priv == cur_id)
- continue;
- if (reuseaddr && cur_id->reuseaddr)
- continue;
- cur_addr = cma_src_addr(cur_id);
- if (id_priv->afonly && cur_id->afonly &&
- (addr->sa_family != cur_addr->sa_family))
- continue;
- if (cma_any_addr(addr) || cma_any_addr(cur_addr))
- return -EADDRNOTAVAIL;
- if (!cma_addr_cmp(addr, cur_addr))
- return -EADDRINUSE;
- }
- return 0;
- }
- static int cma_use_port(enum rdma_ucm_port_space ps,
- struct rdma_id_private *id_priv)
- {
- struct rdma_bind_list *bind_list;
- unsigned short snum;
- int ret;
- lockdep_assert_held(&lock);
- snum = ntohs(cma_port(cma_src_addr(id_priv)));
- if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
- return -EACCES;
- bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
- if (!bind_list) {
- ret = cma_alloc_port(ps, id_priv, snum);
- } else {
- ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
- if (!ret)
- cma_bind_port(bind_list, id_priv);
- }
- return ret;
- }
- static enum rdma_ucm_port_space
- cma_select_inet_ps(struct rdma_id_private *id_priv)
- {
- switch (id_priv->id.ps) {
- case RDMA_PS_TCP:
- case RDMA_PS_UDP:
- case RDMA_PS_IPOIB:
- case RDMA_PS_IB:
- return id_priv->id.ps;
- default:
- return 0;
- }
- }
- static enum rdma_ucm_port_space
- cma_select_ib_ps(struct rdma_id_private *id_priv)
- {
- enum rdma_ucm_port_space ps = 0;
- struct sockaddr_ib *sib;
- u64 sid_ps, mask, sid;
- sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
- mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
- sid = be64_to_cpu(sib->sib_sid) & mask;
- if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
- sid_ps = RDMA_IB_IP_PS_IB;
- ps = RDMA_PS_IB;
- } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
- (sid == (RDMA_IB_IP_PS_TCP & mask))) {
- sid_ps = RDMA_IB_IP_PS_TCP;
- ps = RDMA_PS_TCP;
- } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
- (sid == (RDMA_IB_IP_PS_UDP & mask))) {
- sid_ps = RDMA_IB_IP_PS_UDP;
- ps = RDMA_PS_UDP;
- }
- if (ps) {
- sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
- sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
- be64_to_cpu(sib->sib_sid_mask));
- }
- return ps;
- }
- static int cma_get_port(struct rdma_id_private *id_priv)
- {
- enum rdma_ucm_port_space ps;
- int ret;
- if (cma_family(id_priv) != AF_IB)
- ps = cma_select_inet_ps(id_priv);
- else
- ps = cma_select_ib_ps(id_priv);
- if (!ps)
- return -EPROTONOSUPPORT;
- mutex_lock(&lock);
- if (cma_any_port(cma_src_addr(id_priv)))
- ret = cma_alloc_any_port(ps, id_priv);
- else
- ret = cma_use_port(ps, id_priv);
- mutex_unlock(&lock);
- return ret;
- }
- static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
- struct sockaddr *addr)
- {
- #if IS_ENABLED(CONFIG_IPV6)
- struct sockaddr_in6 *sin6;
- if (addr->sa_family != AF_INET6)
- return 0;
- sin6 = (struct sockaddr_in6 *) addr;
- if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
- return 0;
- if (!sin6->sin6_scope_id)
- return -EINVAL;
- dev_addr->bound_dev_if = sin6->sin6_scope_id;
- #endif
- return 0;
- }
- int rdma_listen(struct rdma_cm_id *id, int backlog)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- int ret;
- if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) {
- struct sockaddr_in any_in = {
- .sin_family = AF_INET,
- .sin_addr.s_addr = htonl(INADDR_ANY),
- };
- /* For a well behaved ULP state will be RDMA_CM_IDLE */
- ret = rdma_bind_addr(id, (struct sockaddr *)&any_in);
- if (ret)
- return ret;
- if (WARN_ON(!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND,
- RDMA_CM_LISTEN)))
- return -EINVAL;
- }
- /*
- * Once the ID reaches RDMA_CM_LISTEN it is not allowed to be reusable
- * any more, and has to be unique in the bind list.
- */
- if (id_priv->reuseaddr) {
- mutex_lock(&lock);
- ret = cma_check_port(id_priv->bind_list, id_priv, 0);
- if (!ret)
- id_priv->reuseaddr = 0;
- mutex_unlock(&lock);
- if (ret)
- goto err;
- }
- id_priv->backlog = backlog;
- if (id_priv->cma_dev) {
- if (rdma_cap_ib_cm(id->device, 1)) {
- ret = cma_ib_listen(id_priv);
- if (ret)
- goto err;
- } else if (rdma_cap_iw_cm(id->device, 1)) {
- ret = cma_iw_listen(id_priv, backlog);
- if (ret)
- goto err;
- } else {
- ret = -ENOSYS;
- goto err;
- }
- } else {
- ret = cma_listen_on_all(id_priv);
- if (ret)
- goto err;
- }
- return 0;
- err:
- id_priv->backlog = 0;
- /*
- * All the failure paths that lead here will not allow the req_handler's
- * to have run.
- */
- cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
- return ret;
- }
- EXPORT_SYMBOL(rdma_listen);
- int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
- {
- struct rdma_id_private *id_priv;
- int ret;
- struct sockaddr *daddr;
- if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
- addr->sa_family != AF_IB)
- return -EAFNOSUPPORT;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
- return -EINVAL;
- ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
- if (ret)
- goto err1;
- memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
- if (!cma_any_addr(addr)) {
- ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
- if (ret)
- goto err1;
- ret = cma_acquire_dev_by_src_ip(id_priv);
- if (ret)
- goto err1;
- }
- if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
- if (addr->sa_family == AF_INET)
- id_priv->afonly = 1;
- #if IS_ENABLED(CONFIG_IPV6)
- else if (addr->sa_family == AF_INET6) {
- struct net *net = id_priv->id.route.addr.dev_addr.net;
- id_priv->afonly = net->ipv6.sysctl.bindv6only;
- }
- #endif
- }
- daddr = cma_dst_addr(id_priv);
- daddr->sa_family = addr->sa_family;
- ret = cma_get_port(id_priv);
- if (ret)
- goto err2;
- if (!cma_any_addr(addr))
- rdma_restrack_add(&id_priv->res);
- return 0;
- err2:
- if (id_priv->cma_dev)
- cma_release_dev(id_priv);
- err1:
- cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
- return ret;
- }
- EXPORT_SYMBOL(rdma_bind_addr);
- static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
- {
- struct cma_hdr *cma_hdr;
- cma_hdr = hdr;
- cma_hdr->cma_version = CMA_VERSION;
- if (cma_family(id_priv) == AF_INET) {
- struct sockaddr_in *src4, *dst4;
- src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
- dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
- cma_set_ip_ver(cma_hdr, 4);
- cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
- cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
- cma_hdr->port = src4->sin_port;
- } else if (cma_family(id_priv) == AF_INET6) {
- struct sockaddr_in6 *src6, *dst6;
- src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
- dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
- cma_set_ip_ver(cma_hdr, 6);
- cma_hdr->src_addr.ip6 = src6->sin6_addr;
- cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
- cma_hdr->port = src6->sin6_port;
- }
- return 0;
- }
- static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
- const struct ib_cm_event *ib_event)
- {
- struct rdma_id_private *id_priv = cm_id->context;
- struct rdma_cm_event event = {};
- const struct ib_cm_sidr_rep_event_param *rep =
- &ib_event->param.sidr_rep_rcvd;
- int ret;
- mutex_lock(&id_priv->handler_mutex);
- if (READ_ONCE(id_priv->state) != RDMA_CM_CONNECT)
- goto out;
- switch (ib_event->event) {
- case IB_CM_SIDR_REQ_ERROR:
- event.event = RDMA_CM_EVENT_UNREACHABLE;
- event.status = -ETIMEDOUT;
- break;
- case IB_CM_SIDR_REP_RECEIVED:
- event.param.ud.private_data = ib_event->private_data;
- event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
- if (rep->status != IB_SIDR_SUCCESS) {
- event.event = RDMA_CM_EVENT_UNREACHABLE;
- event.status = ib_event->param.sidr_rep_rcvd.status;
- pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
- event.status);
- break;
- }
- ret = cma_set_qkey(id_priv, rep->qkey);
- if (ret) {
- pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
- event.event = RDMA_CM_EVENT_ADDR_ERROR;
- event.status = ret;
- break;
- }
- ib_init_ah_attr_from_path(id_priv->id.device,
- id_priv->id.port_num,
- id_priv->id.route.path_rec,
- &event.param.ud.ah_attr,
- rep->sgid_attr);
- event.param.ud.qp_num = rep->qpn;
- event.param.ud.qkey = rep->qkey;
- event.event = RDMA_CM_EVENT_ESTABLISHED;
- event.status = 0;
- break;
- default:
- pr_err("RDMA CMA: unexpected IB CM event: %d\n",
- ib_event->event);
- goto out;
- }
- ret = cma_cm_event_handler(id_priv, &event);
- rdma_destroy_ah_attr(&event.param.ud.ah_attr);
- if (ret) {
- /* Destroy the CM ID by returning a non-zero value. */
- id_priv->cm_id.ib = NULL;
- destroy_id_handler_unlock(id_priv);
- return ret;
- }
- out:
- mutex_unlock(&id_priv->handler_mutex);
- return 0;
- }
- static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
- struct rdma_conn_param *conn_param)
- {
- struct ib_cm_sidr_req_param req;
- struct ib_cm_id *id;
- void *private_data;
- u8 offset;
- int ret;
- memset(&req, 0, sizeof req);
- offset = cma_user_data_offset(id_priv);
- req.private_data_len = offset + conn_param->private_data_len;
- if (req.private_data_len < conn_param->private_data_len)
- return -EINVAL;
- if (req.private_data_len) {
- private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
- if (!private_data)
- return -ENOMEM;
- } else {
- private_data = NULL;
- }
- if (conn_param->private_data && conn_param->private_data_len)
- memcpy(private_data + offset, conn_param->private_data,
- conn_param->private_data_len);
- if (private_data) {
- ret = cma_format_hdr(private_data, id_priv);
- if (ret)
- goto out;
- req.private_data = private_data;
- }
- id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
- id_priv);
- if (IS_ERR(id)) {
- ret = PTR_ERR(id);
- goto out;
- }
- id_priv->cm_id.ib = id;
- req.path = id_priv->id.route.path_rec;
- req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
- req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
- req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
- req.max_cm_retries = CMA_MAX_CM_RETRIES;
- trace_cm_send_sidr_req(id_priv);
- ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
- if (ret) {
- ib_destroy_cm_id(id_priv->cm_id.ib);
- id_priv->cm_id.ib = NULL;
- }
- out:
- kfree(private_data);
- return ret;
- }
- static int cma_connect_ib(struct rdma_id_private *id_priv,
- struct rdma_conn_param *conn_param)
- {
- struct ib_cm_req_param req;
- struct rdma_route *route;
- void *private_data;
- struct ib_cm_id *id;
- u8 offset;
- int ret;
- memset(&req, 0, sizeof req);
- offset = cma_user_data_offset(id_priv);
- req.private_data_len = offset + conn_param->private_data_len;
- if (req.private_data_len < conn_param->private_data_len)
- return -EINVAL;
- if (req.private_data_len) {
- private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
- if (!private_data)
- return -ENOMEM;
- } else {
- private_data = NULL;
- }
- if (conn_param->private_data && conn_param->private_data_len)
- memcpy(private_data + offset, conn_param->private_data,
- conn_param->private_data_len);
- id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
- if (IS_ERR(id)) {
- ret = PTR_ERR(id);
- goto out;
- }
- id_priv->cm_id.ib = id;
- route = &id_priv->id.route;
- if (private_data) {
- ret = cma_format_hdr(private_data, id_priv);
- if (ret)
- goto out;
- req.private_data = private_data;
- }
- req.primary_path = &route->path_rec[0];
- if (route->num_paths == 2)
- req.alternate_path = &route->path_rec[1];
- req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
- /* Alternate path SGID attribute currently unsupported */
- req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
- req.qp_num = id_priv->qp_num;
- req.qp_type = id_priv->id.qp_type;
- req.starting_psn = id_priv->seq_num;
- req.responder_resources = conn_param->responder_resources;
- req.initiator_depth = conn_param->initiator_depth;
- req.flow_control = conn_param->flow_control;
- req.retry_count = min_t(u8, 7, conn_param->retry_count);
- req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
- req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
- req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
- req.max_cm_retries = CMA_MAX_CM_RETRIES;
- req.srq = id_priv->srq ? 1 : 0;
- req.ece.vendor_id = id_priv->ece.vendor_id;
- req.ece.attr_mod = id_priv->ece.attr_mod;
- trace_cm_send_req(id_priv);
- ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
- out:
- if (ret && !IS_ERR(id)) {
- ib_destroy_cm_id(id);
- id_priv->cm_id.ib = NULL;
- }
- kfree(private_data);
- return ret;
- }
- static int cma_connect_iw(struct rdma_id_private *id_priv,
- struct rdma_conn_param *conn_param)
- {
- struct iw_cm_id *cm_id;
- int ret;
- struct iw_cm_conn_param iw_param;
- cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
- if (IS_ERR(cm_id))
- return PTR_ERR(cm_id);
- mutex_lock(&id_priv->qp_mutex);
- cm_id->tos = id_priv->tos;
- cm_id->tos_set = id_priv->tos_set;
- mutex_unlock(&id_priv->qp_mutex);
- id_priv->cm_id.iw = cm_id;
- memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
- rdma_addr_size(cma_src_addr(id_priv)));
- memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
- rdma_addr_size(cma_dst_addr(id_priv)));
- ret = cma_modify_qp_rtr(id_priv, conn_param);
- if (ret)
- goto out;
- if (conn_param) {
- iw_param.ord = conn_param->initiator_depth;
- iw_param.ird = conn_param->responder_resources;
- iw_param.private_data = conn_param->private_data;
- iw_param.private_data_len = conn_param->private_data_len;
- iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
- } else {
- memset(&iw_param, 0, sizeof iw_param);
- iw_param.qpn = id_priv->qp_num;
- }
- ret = iw_cm_connect(cm_id, &iw_param);
- out:
- if (ret) {
- iw_destroy_cm_id(cm_id);
- id_priv->cm_id.iw = NULL;
- }
- return ret;
- }
- /**
- * rdma_connect_locked - Initiate an active connection request.
- * @id: Connection identifier to connect.
- * @conn_param: Connection information used for connected QPs.
- *
- * Same as rdma_connect() but can only be called from the
- * RDMA_CM_EVENT_ROUTE_RESOLVED handler callback.
- */
- int rdma_connect_locked(struct rdma_cm_id *id,
- struct rdma_conn_param *conn_param)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- int ret;
- if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
- return -EINVAL;
- if (!id->qp) {
- id_priv->qp_num = conn_param->qp_num;
- id_priv->srq = conn_param->srq;
- }
- if (rdma_cap_ib_cm(id->device, id->port_num)) {
- if (id->qp_type == IB_QPT_UD)
- ret = cma_resolve_ib_udp(id_priv, conn_param);
- else
- ret = cma_connect_ib(id_priv, conn_param);
- } else if (rdma_cap_iw_cm(id->device, id->port_num))
- ret = cma_connect_iw(id_priv, conn_param);
- else
- ret = -ENOSYS;
- if (ret)
- goto err_state;
- return 0;
- err_state:
- cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
- return ret;
- }
- EXPORT_SYMBOL(rdma_connect_locked);
- /**
- * rdma_connect - Initiate an active connection request.
- * @id: Connection identifier to connect.
- * @conn_param: Connection information used for connected QPs.
- *
- * Users must have resolved a route for the rdma_cm_id to connect with by having
- * called rdma_resolve_route before calling this routine.
- *
- * This call will either connect to a remote QP or obtain remote QP information
- * for unconnected rdma_cm_id's. The actual operation is based on the
- * rdma_cm_id's port space.
- */
- int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- int ret;
- mutex_lock(&id_priv->handler_mutex);
- ret = rdma_connect_locked(id, conn_param);
- mutex_unlock(&id_priv->handler_mutex);
- return ret;
- }
- EXPORT_SYMBOL(rdma_connect);
- /**
- * rdma_connect_ece - Initiate an active connection request with ECE data.
- * @id: Connection identifier to connect.
- * @conn_param: Connection information used for connected QPs.
- * @ece: ECE parameters
- *
- * See rdma_connect() explanation.
- */
- int rdma_connect_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
- struct rdma_ucm_ece *ece)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- id_priv->ece.vendor_id = ece->vendor_id;
- id_priv->ece.attr_mod = ece->attr_mod;
- return rdma_connect(id, conn_param);
- }
- EXPORT_SYMBOL(rdma_connect_ece);
- static int cma_accept_ib(struct rdma_id_private *id_priv,
- struct rdma_conn_param *conn_param)
- {
- struct ib_cm_rep_param rep;
- int ret;
- ret = cma_modify_qp_rtr(id_priv, conn_param);
- if (ret)
- goto out;
- ret = cma_modify_qp_rts(id_priv, conn_param);
- if (ret)
- goto out;
- memset(&rep, 0, sizeof rep);
- rep.qp_num = id_priv->qp_num;
- rep.starting_psn = id_priv->seq_num;
- rep.private_data = conn_param->private_data;
- rep.private_data_len = conn_param->private_data_len;
- rep.responder_resources = conn_param->responder_resources;
- rep.initiator_depth = conn_param->initiator_depth;
- rep.failover_accepted = 0;
- rep.flow_control = conn_param->flow_control;
- rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
- rep.srq = id_priv->srq ? 1 : 0;
- rep.ece.vendor_id = id_priv->ece.vendor_id;
- rep.ece.attr_mod = id_priv->ece.attr_mod;
- trace_cm_send_rep(id_priv);
- ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
- out:
- return ret;
- }
- static int cma_accept_iw(struct rdma_id_private *id_priv,
- struct rdma_conn_param *conn_param)
- {
- struct iw_cm_conn_param iw_param;
- int ret;
- if (!conn_param)
- return -EINVAL;
- ret = cma_modify_qp_rtr(id_priv, conn_param);
- if (ret)
- return ret;
- iw_param.ord = conn_param->initiator_depth;
- iw_param.ird = conn_param->responder_resources;
- iw_param.private_data = conn_param->private_data;
- iw_param.private_data_len = conn_param->private_data_len;
- if (id_priv->id.qp) {
- iw_param.qpn = id_priv->qp_num;
- } else
- iw_param.qpn = conn_param->qp_num;
- return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
- }
- static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
- enum ib_cm_sidr_status status, u32 qkey,
- const void *private_data, int private_data_len)
- {
- struct ib_cm_sidr_rep_param rep;
- int ret;
- memset(&rep, 0, sizeof rep);
- rep.status = status;
- if (status == IB_SIDR_SUCCESS) {
- ret = cma_set_qkey(id_priv, qkey);
- if (ret)
- return ret;
- rep.qp_num = id_priv->qp_num;
- rep.qkey = id_priv->qkey;
- rep.ece.vendor_id = id_priv->ece.vendor_id;
- rep.ece.attr_mod = id_priv->ece.attr_mod;
- }
- rep.private_data = private_data;
- rep.private_data_len = private_data_len;
- trace_cm_send_sidr_rep(id_priv);
- return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
- }
- /**
- * rdma_accept - Called to accept a connection request or response.
- * @id: Connection identifier associated with the request.
- * @conn_param: Information needed to establish the connection. This must be
- * provided if accepting a connection request. If accepting a connection
- * response, this parameter must be NULL.
- *
- * Typically, this routine is only called by the listener to accept a connection
- * request. It must also be called on the active side of a connection if the
- * user is performing their own QP transitions.
- *
- * In the case of error, a reject message is sent to the remote side and the
- * state of the qp associated with the id is modified to error, such that any
- * previously posted receive buffers would be flushed.
- *
- * This function is for use by kernel ULPs and must be called from under the
- * handler callback.
- */
- int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- int ret;
- lockdep_assert_held(&id_priv->handler_mutex);
- if (READ_ONCE(id_priv->state) != RDMA_CM_CONNECT)
- return -EINVAL;
- if (!id->qp && conn_param) {
- id_priv->qp_num = conn_param->qp_num;
- id_priv->srq = conn_param->srq;
- }
- if (rdma_cap_ib_cm(id->device, id->port_num)) {
- if (id->qp_type == IB_QPT_UD) {
- if (conn_param)
- ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
- conn_param->qkey,
- conn_param->private_data,
- conn_param->private_data_len);
- else
- ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
- 0, NULL, 0);
- } else {
- if (conn_param)
- ret = cma_accept_ib(id_priv, conn_param);
- else
- ret = cma_rep_recv(id_priv);
- }
- } else if (rdma_cap_iw_cm(id->device, id->port_num))
- ret = cma_accept_iw(id_priv, conn_param);
- else
- ret = -ENOSYS;
- if (ret)
- goto reject;
- return 0;
- reject:
- cma_modify_qp_err(id_priv);
- rdma_reject(id, NULL, 0, IB_CM_REJ_CONSUMER_DEFINED);
- return ret;
- }
- EXPORT_SYMBOL(rdma_accept);
- int rdma_accept_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
- struct rdma_ucm_ece *ece)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- id_priv->ece.vendor_id = ece->vendor_id;
- id_priv->ece.attr_mod = ece->attr_mod;
- return rdma_accept(id, conn_param);
- }
- EXPORT_SYMBOL(rdma_accept_ece);
- void rdma_lock_handler(struct rdma_cm_id *id)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- mutex_lock(&id_priv->handler_mutex);
- }
- EXPORT_SYMBOL(rdma_lock_handler);
- void rdma_unlock_handler(struct rdma_cm_id *id)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- mutex_unlock(&id_priv->handler_mutex);
- }
- EXPORT_SYMBOL(rdma_unlock_handler);
- int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
- {
- struct rdma_id_private *id_priv;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (!id_priv->cm_id.ib)
- return -EINVAL;
- switch (id->device->node_type) {
- case RDMA_NODE_IB_CA:
- ret = ib_cm_notify(id_priv->cm_id.ib, event);
- break;
- default:
- ret = 0;
- break;
- }
- return ret;
- }
- EXPORT_SYMBOL(rdma_notify);
- int rdma_reject(struct rdma_cm_id *id, const void *private_data,
- u8 private_data_len, u8 reason)
- {
- struct rdma_id_private *id_priv;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (!id_priv->cm_id.ib)
- return -EINVAL;
- if (rdma_cap_ib_cm(id->device, id->port_num)) {
- if (id->qp_type == IB_QPT_UD) {
- ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
- private_data, private_data_len);
- } else {
- trace_cm_send_rej(id_priv);
- ret = ib_send_cm_rej(id_priv->cm_id.ib, reason, NULL, 0,
- private_data, private_data_len);
- }
- } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
- ret = iw_cm_reject(id_priv->cm_id.iw,
- private_data, private_data_len);
- } else
- ret = -ENOSYS;
- return ret;
- }
- EXPORT_SYMBOL(rdma_reject);
- int rdma_disconnect(struct rdma_cm_id *id)
- {
- struct rdma_id_private *id_priv;
- int ret;
- id_priv = container_of(id, struct rdma_id_private, id);
- if (!id_priv->cm_id.ib)
- return -EINVAL;
- if (rdma_cap_ib_cm(id->device, id->port_num)) {
- ret = cma_modify_qp_err(id_priv);
- if (ret)
- goto out;
- /* Initiate or respond to a disconnect. */
- trace_cm_disconnect(id_priv);
- if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) {
- if (!ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0))
- trace_cm_sent_drep(id_priv);
- } else {
- trace_cm_sent_dreq(id_priv);
- }
- } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
- ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
- } else
- ret = -EINVAL;
- out:
- return ret;
- }
- EXPORT_SYMBOL(rdma_disconnect);
- static void cma_make_mc_event(int status, struct rdma_id_private *id_priv,
- struct ib_sa_multicast *multicast,
- struct rdma_cm_event *event,
- struct cma_multicast *mc)
- {
- struct rdma_dev_addr *dev_addr;
- enum ib_gid_type gid_type;
- struct net_device *ndev;
- if (!status)
- status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
- else
- pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
- status);
- event->status = status;
- event->param.ud.private_data = mc->context;
- if (status) {
- event->event = RDMA_CM_EVENT_MULTICAST_ERROR;
- return;
- }
- dev_addr = &id_priv->id.route.addr.dev_addr;
- ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
- gid_type =
- id_priv->cma_dev
- ->default_gid_type[id_priv->id.port_num -
- rdma_start_port(
- id_priv->cma_dev->device)];
- event->event = RDMA_CM_EVENT_MULTICAST_JOIN;
- if (ib_init_ah_from_mcmember(id_priv->id.device, id_priv->id.port_num,
- &multicast->rec, ndev, gid_type,
- &event->param.ud.ah_attr)) {
- event->event = RDMA_CM_EVENT_MULTICAST_ERROR;
- goto out;
- }
- event->param.ud.qp_num = 0xFFFFFF;
- event->param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
- out:
- if (ndev)
- dev_put(ndev);
- }
- static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
- {
- struct cma_multicast *mc = multicast->context;
- struct rdma_id_private *id_priv = mc->id_priv;
- struct rdma_cm_event event = {};
- int ret = 0;
- mutex_lock(&id_priv->handler_mutex);
- if (READ_ONCE(id_priv->state) == RDMA_CM_DEVICE_REMOVAL ||
- READ_ONCE(id_priv->state) == RDMA_CM_DESTROYING)
- goto out;
- cma_make_mc_event(status, id_priv, multicast, &event, mc);
- ret = cma_cm_event_handler(id_priv, &event);
- rdma_destroy_ah_attr(&event.param.ud.ah_attr);
- WARN_ON(ret);
- out:
- mutex_unlock(&id_priv->handler_mutex);
- return 0;
- }
- static void cma_set_mgid(struct rdma_id_private *id_priv,
- struct sockaddr *addr, union ib_gid *mgid)
- {
- unsigned char mc_map[MAX_ADDR_LEN];
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- struct sockaddr_in *sin = (struct sockaddr_in *) addr;
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
- if (cma_any_addr(addr)) {
- memset(mgid, 0, sizeof *mgid);
- } else if ((addr->sa_family == AF_INET6) &&
- ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
- 0xFF10A01B)) {
- /* IPv6 address is an SA assigned MGID. */
- memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
- } else if (addr->sa_family == AF_IB) {
- memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
- } else if (addr->sa_family == AF_INET6) {
- ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
- if (id_priv->id.ps == RDMA_PS_UDP)
- mc_map[7] = 0x01; /* Use RDMA CM signature */
- *mgid = *(union ib_gid *) (mc_map + 4);
- } else {
- ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
- if (id_priv->id.ps == RDMA_PS_UDP)
- mc_map[7] = 0x01; /* Use RDMA CM signature */
- *mgid = *(union ib_gid *) (mc_map + 4);
- }
- }
- static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
- struct cma_multicast *mc)
- {
- struct ib_sa_mcmember_rec rec;
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- ib_sa_comp_mask comp_mask;
- int ret;
- ib_addr_get_mgid(dev_addr, &rec.mgid);
- ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
- &rec.mgid, &rec);
- if (ret)
- return ret;
- ret = cma_set_qkey(id_priv, 0);
- if (ret)
- return ret;
- cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
- rec.qkey = cpu_to_be32(id_priv->qkey);
- rdma_addr_get_sgid(dev_addr, &rec.port_gid);
- rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
- rec.join_state = mc->join_state;
- if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
- (!ib_sa_sendonly_fullmem_support(&sa_client,
- id_priv->id.device,
- id_priv->id.port_num))) {
- dev_warn(
- &id_priv->id.device->dev,
- "RDMA CM: port %u Unable to multicast join: SM doesn't support Send Only Full Member option\n",
- id_priv->id.port_num);
- return -EOPNOTSUPP;
- }
- comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
- IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
- IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
- IB_SA_MCMEMBER_REC_FLOW_LABEL |
- IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
- if (id_priv->id.ps == RDMA_PS_IPOIB)
- comp_mask |= IB_SA_MCMEMBER_REC_RATE |
- IB_SA_MCMEMBER_REC_RATE_SELECTOR |
- IB_SA_MCMEMBER_REC_MTU_SELECTOR |
- IB_SA_MCMEMBER_REC_MTU |
- IB_SA_MCMEMBER_REC_HOP_LIMIT;
- mc->sa_mc = ib_sa_join_multicast(&sa_client, id_priv->id.device,
- id_priv->id.port_num, &rec, comp_mask,
- GFP_KERNEL, cma_ib_mc_handler, mc);
- return PTR_ERR_OR_ZERO(mc->sa_mc);
- }
- static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
- enum ib_gid_type gid_type)
- {
- struct sockaddr_in *sin = (struct sockaddr_in *)addr;
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
- if (cma_any_addr(addr)) {
- memset(mgid, 0, sizeof *mgid);
- } else if (addr->sa_family == AF_INET6) {
- memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
- } else {
- mgid->raw[0] =
- (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
- mgid->raw[1] =
- (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
- mgid->raw[2] = 0;
- mgid->raw[3] = 0;
- mgid->raw[4] = 0;
- mgid->raw[5] = 0;
- mgid->raw[6] = 0;
- mgid->raw[7] = 0;
- mgid->raw[8] = 0;
- mgid->raw[9] = 0;
- mgid->raw[10] = 0xff;
- mgid->raw[11] = 0xff;
- *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
- }
- }
- static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
- struct cma_multicast *mc)
- {
- struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
- int err = 0;
- struct sockaddr *addr = (struct sockaddr *)&mc->addr;
- struct net_device *ndev = NULL;
- struct ib_sa_multicast ib;
- enum ib_gid_type gid_type;
- bool send_only;
- send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
- if (cma_zero_addr(addr))
- return -EINVAL;
- gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
- rdma_start_port(id_priv->cma_dev->device)];
- cma_iboe_set_mgid(addr, &ib.rec.mgid, gid_type);
- ib.rec.pkey = cpu_to_be16(0xffff);
- if (id_priv->id.ps == RDMA_PS_UDP)
- ib.rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
- if (dev_addr->bound_dev_if)
- ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
- if (!ndev)
- return -ENODEV;
- ib.rec.rate = iboe_get_rate(ndev);
- ib.rec.hop_limit = 1;
- ib.rec.mtu = iboe_get_mtu(ndev->mtu);
- if (addr->sa_family == AF_INET) {
- if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
- ib.rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
- if (!send_only) {
- err = cma_igmp_send(ndev, &ib.rec.mgid,
- true);
- }
- }
- } else {
- if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
- err = -ENOTSUPP;
- }
- dev_put(ndev);
- if (err || !ib.rec.mtu)
- return err ?: -EINVAL;
- rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
- &ib.rec.port_gid);
- INIT_WORK(&mc->iboe_join.work, cma_iboe_join_work_handler);
- cma_make_mc_event(0, id_priv, &ib, &mc->iboe_join.event, mc);
- queue_work(cma_wq, &mc->iboe_join.work);
- return 0;
- }
- int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
- u8 join_state, void *context)
- {
- struct rdma_id_private *id_priv =
- container_of(id, struct rdma_id_private, id);
- struct cma_multicast *mc;
- int ret;
- /* Not supported for kernel QPs */
- if (WARN_ON(id->qp))
- return -EINVAL;
- /* ULP is calling this wrong. */
- if (!id->device || (READ_ONCE(id_priv->state) != RDMA_CM_ADDR_BOUND &&
- READ_ONCE(id_priv->state) != RDMA_CM_ADDR_RESOLVED))
- return -EINVAL;
- mc = kzalloc(sizeof(*mc), GFP_KERNEL);
- if (!mc)
- return -ENOMEM;
- memcpy(&mc->addr, addr, rdma_addr_size(addr));
- mc->context = context;
- mc->id_priv = id_priv;
- mc->join_state = join_state;
- if (rdma_protocol_roce(id->device, id->port_num)) {
- ret = cma_iboe_join_multicast(id_priv, mc);
- if (ret)
- goto out_err;
- } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
- ret = cma_join_ib_multicast(id_priv, mc);
- if (ret)
- goto out_err;
- } else {
- ret = -ENOSYS;
- goto out_err;
- }
- spin_lock(&id_priv->lock);
- list_add(&mc->list, &id_priv->mc_list);
- spin_unlock(&id_priv->lock);
- return 0;
- out_err:
- kfree(mc);
- return ret;
- }
- EXPORT_SYMBOL(rdma_join_multicast);
- void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
- {
- struct rdma_id_private *id_priv;
- struct cma_multicast *mc;
- id_priv = container_of(id, struct rdma_id_private, id);
- spin_lock_irq(&id_priv->lock);
- list_for_each_entry(mc, &id_priv->mc_list, list) {
- if (memcmp(&mc->addr, addr, rdma_addr_size(addr)) != 0)
- continue;
- list_del(&mc->list);
- spin_unlock_irq(&id_priv->lock);
- WARN_ON(id_priv->cma_dev->device != id->device);
- destroy_mc(id_priv, mc);
- return;
- }
- spin_unlock_irq(&id_priv->lock);
- }
- EXPORT_SYMBOL(rdma_leave_multicast);
- static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
- {
- struct rdma_dev_addr *dev_addr;
- struct cma_work *work;
- dev_addr = &id_priv->id.route.addr.dev_addr;
- if ((dev_addr->bound_dev_if == ndev->ifindex) &&
- (net_eq(dev_net(ndev), dev_addr->net)) &&
- memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
- pr_info("RDMA CM addr change for ndev %s used by id %p\n",
- ndev->name, &id_priv->id);
- work = kzalloc(sizeof *work, GFP_KERNEL);
- if (!work)
- return -ENOMEM;
- INIT_WORK(&work->work, cma_work_handler);
- work->id = id_priv;
- work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
- cma_id_get(id_priv);
- queue_work(cma_wq, &work->work);
- }
- return 0;
- }
- static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
- void *ptr)
- {
- struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
- struct cma_device *cma_dev;
- struct rdma_id_private *id_priv;
- int ret = NOTIFY_DONE;
- if (event != NETDEV_BONDING_FAILOVER)
- return NOTIFY_DONE;
- if (!netif_is_bond_master(ndev))
- return NOTIFY_DONE;
- mutex_lock(&lock);
- list_for_each_entry(cma_dev, &dev_list, list)
- list_for_each_entry(id_priv, &cma_dev->id_list, list) {
- ret = cma_netdev_change(ndev, id_priv);
- if (ret)
- goto out;
- }
- out:
- mutex_unlock(&lock);
- return ret;
- }
- static struct notifier_block cma_nb = {
- .notifier_call = cma_netdev_callback
- };
- static void cma_send_device_removal_put(struct rdma_id_private *id_priv)
- {
- struct rdma_cm_event event = { .event = RDMA_CM_EVENT_DEVICE_REMOVAL };
- enum rdma_cm_state state;
- unsigned long flags;
- mutex_lock(&id_priv->handler_mutex);
- /* Record that we want to remove the device */
- spin_lock_irqsave(&id_priv->lock, flags);
- state = id_priv->state;
- if (state == RDMA_CM_DESTROYING || state == RDMA_CM_DEVICE_REMOVAL) {
- spin_unlock_irqrestore(&id_priv->lock, flags);
- mutex_unlock(&id_priv->handler_mutex);
- cma_id_put(id_priv);
- return;
- }
- id_priv->state = RDMA_CM_DEVICE_REMOVAL;
- spin_unlock_irqrestore(&id_priv->lock, flags);
- if (cma_cm_event_handler(id_priv, &event)) {
- /*
- * At this point the ULP promises it won't call
- * rdma_destroy_id() concurrently
- */
- cma_id_put(id_priv);
- mutex_unlock(&id_priv->handler_mutex);
- trace_cm_id_destroy(id_priv);
- _destroy_id(id_priv, state);
- return;
- }
- mutex_unlock(&id_priv->handler_mutex);
- /*
- * If this races with destroy then the thread that first assigns state
- * to a destroying does the cancel.
- */
- cma_cancel_operation(id_priv, state);
- cma_id_put(id_priv);
- }
- static void cma_process_remove(struct cma_device *cma_dev)
- {
- mutex_lock(&lock);
- while (!list_empty(&cma_dev->id_list)) {
- struct rdma_id_private *id_priv = list_first_entry(
- &cma_dev->id_list, struct rdma_id_private, list);
- list_del(&id_priv->listen_list);
- list_del_init(&id_priv->list);
- cma_id_get(id_priv);
- mutex_unlock(&lock);
- cma_send_device_removal_put(id_priv);
- mutex_lock(&lock);
- }
- mutex_unlock(&lock);
- cma_dev_put(cma_dev);
- wait_for_completion(&cma_dev->comp);
- }
- static int cma_add_one(struct ib_device *device)
- {
- struct rdma_id_private *to_destroy;
- struct cma_device *cma_dev;
- struct rdma_id_private *id_priv;
- unsigned int i;
- unsigned long supported_gids = 0;
- int ret;
- cma_dev = kmalloc(sizeof(*cma_dev), GFP_KERNEL);
- if (!cma_dev)
- return -ENOMEM;
- cma_dev->device = device;
- cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
- sizeof(*cma_dev->default_gid_type),
- GFP_KERNEL);
- if (!cma_dev->default_gid_type) {
- ret = -ENOMEM;
- goto free_cma_dev;
- }
- cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
- sizeof(*cma_dev->default_roce_tos),
- GFP_KERNEL);
- if (!cma_dev->default_roce_tos) {
- ret = -ENOMEM;
- goto free_gid_type;
- }
- rdma_for_each_port (device, i) {
- supported_gids = roce_gid_type_mask_support(device, i);
- WARN_ON(!supported_gids);
- if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
- cma_dev->default_gid_type[i - rdma_start_port(device)] =
- CMA_PREFERRED_ROCE_GID_TYPE;
- else
- cma_dev->default_gid_type[i - rdma_start_port(device)] =
- find_first_bit(&supported_gids, BITS_PER_LONG);
- cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
- }
- init_completion(&cma_dev->comp);
- refcount_set(&cma_dev->refcount, 1);
- INIT_LIST_HEAD(&cma_dev->id_list);
- ib_set_client_data(device, &cma_client, cma_dev);
- mutex_lock(&lock);
- list_add_tail(&cma_dev->list, &dev_list);
- list_for_each_entry(id_priv, &listen_any_list, list) {
- ret = cma_listen_on_dev(id_priv, cma_dev, &to_destroy);
- if (ret)
- goto free_listen;
- }
- mutex_unlock(&lock);
- trace_cm_add_one(device);
- return 0;
- free_listen:
- list_del(&cma_dev->list);
- mutex_unlock(&lock);
- /* cma_process_remove() will delete to_destroy */
- cma_process_remove(cma_dev);
- kfree(cma_dev->default_roce_tos);
- free_gid_type:
- kfree(cma_dev->default_gid_type);
- free_cma_dev:
- kfree(cma_dev);
- return ret;
- }
- static void cma_remove_one(struct ib_device *device, void *client_data)
- {
- struct cma_device *cma_dev = client_data;
- trace_cm_remove_one(device);
- mutex_lock(&lock);
- list_del(&cma_dev->list);
- mutex_unlock(&lock);
- cma_process_remove(cma_dev);
- kfree(cma_dev->default_roce_tos);
- kfree(cma_dev->default_gid_type);
- kfree(cma_dev);
- }
- static int cma_init_net(struct net *net)
- {
- struct cma_pernet *pernet = cma_pernet(net);
- xa_init(&pernet->tcp_ps);
- xa_init(&pernet->udp_ps);
- xa_init(&pernet->ipoib_ps);
- xa_init(&pernet->ib_ps);
- return 0;
- }
- static void cma_exit_net(struct net *net)
- {
- struct cma_pernet *pernet = cma_pernet(net);
- WARN_ON(!xa_empty(&pernet->tcp_ps));
- WARN_ON(!xa_empty(&pernet->udp_ps));
- WARN_ON(!xa_empty(&pernet->ipoib_ps));
- WARN_ON(!xa_empty(&pernet->ib_ps));
- }
- static struct pernet_operations cma_pernet_operations = {
- .init = cma_init_net,
- .exit = cma_exit_net,
- .id = &cma_pernet_id,
- .size = sizeof(struct cma_pernet),
- };
- static int __init cma_init(void)
- {
- int ret;
- /*
- * There is a rare lock ordering dependency in cma_netdev_callback()
- * that only happens when bonding is enabled. Teach lockdep that rtnl
- * must never be nested under lock so it can find these without having
- * to test with bonding.
- */
- if (IS_ENABLED(CONFIG_LOCKDEP)) {
- rtnl_lock();
- mutex_lock(&lock);
- mutex_unlock(&lock);
- rtnl_unlock();
- }
- cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
- if (!cma_wq)
- return -ENOMEM;
- ret = register_pernet_subsys(&cma_pernet_operations);
- if (ret)
- goto err_wq;
- ib_sa_register_client(&sa_client);
- register_netdevice_notifier(&cma_nb);
- ret = ib_register_client(&cma_client);
- if (ret)
- goto err;
- ret = cma_configfs_init();
- if (ret)
- goto err_ib;
- return 0;
- err_ib:
- ib_unregister_client(&cma_client);
- err:
- unregister_netdevice_notifier(&cma_nb);
- ib_sa_unregister_client(&sa_client);
- unregister_pernet_subsys(&cma_pernet_operations);
- err_wq:
- destroy_workqueue(cma_wq);
- return ret;
- }
- static void __exit cma_cleanup(void)
- {
- cma_configfs_exit();
- ib_unregister_client(&cma_client);
- unregister_netdevice_notifier(&cma_nb);
- ib_sa_unregister_client(&sa_client);
- unregister_pernet_subsys(&cma_pernet_operations);
- destroy_workqueue(cma_wq);
- }
- module_init(cma_init);
- module_exit(cma_cleanup);
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