--- /dev/null
+/*
+ * Copyright (c) 2005 Voltaire Inc. All rights reserved.
+ * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
+ * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
+ * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/completion.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/mutex.h>
+#include <linux/random.h>
+#include <linux/idr.h>
+#include <linux/inetdevice.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <net/route.h>
+
+#include <net/tcp.h>
+#include <net/ipv6.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>
+
+MODULE_AUTHOR("Sean Hefty");
+MODULE_DESCRIPTION("Generic RDMA CM Agent");
+MODULE_LICENSE("Dual BSD/GPL");
+
+#define CMA_CM_RESPONSE_TIMEOUT 20
+#define CMA_MAX_CM_RETRIES 15
+#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
+#define CMA_IBOE_PACKET_LIFETIME 18
+
+static void cma_add_one(struct ib_device *device);
+static void cma_remove_one(struct ib_device *device);
+
+static struct ib_client cma_client = {
+ .name = "cma",
+ .add = cma_add_one,
+ .remove = cma_remove_one
+};
+
+static struct ib_sa_client sa_client;
+static struct rdma_addr_client addr_client;
+static LIST_HEAD(dev_list);
+static LIST_HEAD(listen_any_list);
+static DEFINE_MUTEX(lock);
+static struct workqueue_struct *cma_wq;
+static DEFINE_IDR(tcp_ps);
+static DEFINE_IDR(udp_ps);
+static DEFINE_IDR(ipoib_ps);
+static DEFINE_IDR(ib_ps);
+
+struct cma_device {
+ struct list_head list;
+ struct ib_device *device;
+ struct completion comp;
+ atomic_t refcount;
+ struct list_head id_list;
+};
+
+struct rdma_bind_list {
+ struct idr *ps;
+ struct hlist_head owners;
+ unsigned short port;
+};
+
+enum {
+ CMA_OPTION_AFONLY,
+};
+
+/*
+ * 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 rdma_id_private {
+ struct rdma_cm_id id;
+
+ struct rdma_bind_list *bind_list;
+ struct hlist_node node;
+ struct list_head list; /* listen_any_list or cma_device.list */
+ struct list_head listen_list; /* per device listens */
+ struct cma_device *cma_dev;
+ struct list_head mc_list;
+
+ int internal_id;
+ enum rdma_cm_state state;
+ spinlock_t lock;
+ struct mutex qp_mutex;
+
+ struct completion comp;
+ atomic_t refcount;
+ struct mutex handler_mutex;
+
+ int backlog;
+ int timeout_ms;
+ struct ib_sa_query *query;
+ int query_id;
+ union {
+ struct ib_cm_id *ib;
+ struct iw_cm_id *iw;
+ } cm_id;
+
+ u32 seq_num;
+ u32 qkey;
+ u32 qp_num;
+ pid_t owner;
+ u32 options;
+ u8 srq;
+ u8 tos;
+ u8 reuseaddr;
+ u8 afonly;
+};
+
+struct cma_multicast {
+ struct rdma_id_private *id_priv;
+ union {
+ struct ib_sa_multicast *ib;
+ } multicast;
+ struct list_head list;
+ void *context;
+ struct sockaddr_storage addr;
+ struct kref mcref;
+};
+
+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;
+};
+
+struct cma_ndev_work {
+ struct work_struct work;
+ struct rdma_id_private *id;
+ struct rdma_cm_event event;
+};
+
+struct iboe_mcast_work {
+ struct work_struct work;
+ struct rdma_id_private *id;
+ struct cma_multicast *mc;
+};
+
+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
+
+static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&id_priv->lock, flags);
+ ret = (id_priv->state == comp);
+ spin_unlock_irqrestore(&id_priv->lock, flags);
+ return ret;
+}
+
+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;
+
+ 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 enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
+ enum rdma_cm_state exch)
+{
+ unsigned long flags;
+ enum rdma_cm_state old;
+
+ spin_lock_irqsave(&id_priv->lock, flags);
+ old = id_priv->state;
+ id_priv->state = exch;
+ spin_unlock_irqrestore(&id_priv->lock, flags);
+ return old;
+}
+
+static inline u8 cma_get_ip_ver(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 void cma_attach_to_dev(struct rdma_id_private *id_priv,
+ struct cma_device *cma_dev)
+{
+ atomic_inc(&cma_dev->refcount);
+ 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);
+}
+
+static inline void cma_deref_dev(struct cma_device *cma_dev)
+{
+ if (atomic_dec_and_test(&cma_dev->refcount))
+ complete(&cma_dev->comp);
+}
+
+static inline void release_mc(struct kref *kref)
+{
+ struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
+
+ kfree(mc->multicast.ib);
+ kfree(mc);
+}
+
+static void cma_release_dev(struct rdma_id_private *id_priv)
+{
+ mutex_lock(&lock);
+ list_del(&id_priv->list);
+ cma_deref_dev(id_priv->cma_dev);
+ id_priv->cma_dev = NULL;
+ mutex_unlock(&lock);
+}
+
+static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
+{
+ return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
+}
+
+static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
+{
+ return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
+}
+
+static inline unsigned short cma_family(struct rdma_id_private *id_priv)
+{
+ return id_priv->id.route.addr.src_addr.ss_family;
+}
+
+static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
+{
+ struct ib_sa_mcmember_rec rec;
+ int ret = 0;
+
+ if (id_priv->qkey) {
+ if (qkey && id_priv->qkey != qkey)
+ return -EINVAL;
+ return 0;
+ }
+
+ if (qkey) {
+ id_priv->qkey = qkey;
+ return 0;
+ }
+
+ switch (id_priv->id.ps) {
+ case RDMA_PS_UDP:
+ case RDMA_PS_IB:
+ id_priv->qkey = RDMA_UDP_QKEY;
+ break;
+ case RDMA_PS_IPOIB:
+ ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
+ ret = ib_sa_get_mcmember_rec(id_priv->id.device,
+ id_priv->id.port_num, &rec.mgid,
+ &rec);
+ if (!ret)
+ id_priv->qkey = be32_to_cpu(rec.qkey);
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
+{
+ dev_addr->dev_type = ARPHRD_INFINIBAND;
+ rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
+ ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
+}
+
+static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
+{
+ int ret;
+
+ if (addr->sa_family != AF_IB) {
+ ret = rdma_translate_ip(addr, dev_addr, NULL);
+ } else {
+ cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static int cma_acquire_dev(struct rdma_id_private *id_priv,
+ struct rdma_id_private *listen_id_priv)
+{
+ struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
+ struct cma_device *cma_dev;
+ union ib_gid gid, iboe_gid;
+ int ret = -ENODEV;
+ u8 port, found_port;
+ enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
+ IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
+
+ if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
+ id_priv->id.ps == RDMA_PS_IPOIB)
+ return -EINVAL;
+
+ mutex_lock(&lock);
+ 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);
+ if (listen_id_priv &&
+ rdma_port_get_link_layer(listen_id_priv->id.device,
+ listen_id_priv->id.port_num) == dev_ll) {
+ cma_dev = listen_id_priv->cma_dev;
+ port = listen_id_priv->id.port_num;
+ if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
+ rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
+ ret = ib_find_cached_gid(cma_dev->device, &iboe_gid,
+ &found_port, NULL);
+ else
+ ret = ib_find_cached_gid(cma_dev->device, &gid,
+ &found_port, NULL);
+
+ if (!ret && (port == found_port)) {
+ id_priv->id.port_num = found_port;
+ goto out;
+ }
+ }
+ list_for_each_entry(cma_dev, &dev_list, list) {
+ for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
+ if (listen_id_priv &&
+ listen_id_priv->cma_dev == cma_dev &&
+ listen_id_priv->id.port_num == port)
+ continue;
+ if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
+ if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
+ rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
+ ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, &found_port, NULL);
+ else
+ ret = ib_find_cached_gid(cma_dev->device, &gid, &found_port, NULL);
+
+ if (!ret && (port == found_port)) {
+ id_priv->id.port_num = found_port;
+ goto out;
+ }
+ }
+ }
+ }
+
+out:
+ if (!ret)
+ cma_attach_to_dev(id_priv, cma_dev);
+
+ mutex_unlock(&lock);
+ return ret;
+}
+
+/*
+ * Select the source IB device and address to reach the destination IB address.
+ */
+static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
+{
+ struct cma_device *cma_dev, *cur_dev;
+ struct sockaddr_ib *addr;
+ union ib_gid gid, sgid, *dgid;
+ u16 pkey, index;
+ u8 p;
+ 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);
+
+ list_for_each_entry(cur_dev, &dev_list, list) {
+ if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
+ continue;
+
+ for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
+ if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
+ continue;
+
+ for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
+ if (!memcmp(&gid, dgid, sizeof(gid))) {
+ cma_dev = cur_dev;
+ sgid = gid;
+ id_priv->id.port_num = p;
+ goto found;
+ }
+
+ if (!cma_dev && (gid.global.subnet_prefix ==
+ dgid->global.subnet_prefix)) {
+ cma_dev = cur_dev;
+ sgid = gid;
+ id_priv->id.port_num = p;
+ }
+ }
+ }
+ }
+
+ if (!cma_dev)
+ return -ENODEV;
+
+found:
+ cma_attach_to_dev(id_priv, cma_dev);
+ addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
+ memcpy(&addr->sib_addr, &sgid, sizeof sgid);
+ cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
+ return 0;
+}
+
+static void cma_deref_id(struct rdma_id_private *id_priv)
+{
+ if (atomic_dec_and_test(&id_priv->refcount))
+ complete(&id_priv->comp);
+}
+
+static int cma_disable_callback(struct rdma_id_private *id_priv,
+ enum rdma_cm_state state)
+{
+ mutex_lock(&id_priv->handler_mutex);
+ if (id_priv->state != state) {
+ mutex_unlock(&id_priv->handler_mutex);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
+ void *context, enum rdma_port_space ps,
+ enum ib_qp_type qp_type)
+{
+ struct rdma_id_private *id_priv;
+
+ id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
+ if (!id_priv)
+ return ERR_PTR(-ENOMEM);
+
+ id_priv->owner = task_pid_nr(current);
+ 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;
+ spin_lock_init(&id_priv->lock);
+ mutex_init(&id_priv->qp_mutex);
+ init_completion(&id_priv->comp);
+ atomic_set(&id_priv->refcount, 1);
+ mutex_init(&id_priv->handler_mutex);
+ INIT_LIST_HEAD(&id_priv->listen_list);
+ INIT_LIST_HEAD(&id_priv->mc_list);
+ get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
+
+ return &id_priv->id;
+}
+EXPORT_SYMBOL(rdma_create_id);
+
+static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
+{
+ struct ib_qp_attr qp_attr;
+ int qp_attr_mask, ret;
+
+ qp_attr.qp_state = IB_QPS_INIT;
+ ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
+ if (ret)
+ return ret;
+
+ ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
+ if (ret)
+ return ret;
+
+ qp_attr.qp_state = IB_QPS_RTR;
+ ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
+ if (ret)
+ return ret;
+
+ qp_attr.qp_state = IB_QPS_RTS;
+ qp_attr.sq_psn = 0;
+ ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
+
+ return ret;
+}
+
+static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
+{
+ struct ib_qp_attr qp_attr;
+ int qp_attr_mask, ret;
+
+ qp_attr.qp_state = IB_QPS_INIT;
+ ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
+ if (ret)
+ return ret;
+
+ return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
+}
+
+int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
+ struct ib_qp_init_attr *qp_init_attr)
+{
+ struct rdma_id_private *id_priv;
+ struct ib_qp *qp;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (id->device != pd->device)
+ return -EINVAL;
+
+ qp = ib_create_qp(pd, qp_init_attr);
+ if (IS_ERR(qp))
+ return PTR_ERR(qp);
+
+ if (id->qp_type == IB_QPT_UD)
+ ret = cma_init_ud_qp(id_priv, qp);
+ else
+ ret = cma_init_conn_qp(id_priv, qp);
+ if (ret)
+ goto err;
+
+ id->qp = qp;
+ id_priv->qp_num = qp->qp_num;
+ id_priv->srq = (qp->srq != NULL);
+ return 0;
+err:
+ ib_destroy_qp(qp);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_create_qp);
+
+void rdma_destroy_qp(struct rdma_cm_id *id)
+{
+ struct rdma_id_private *id_priv;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ mutex_lock(&id_priv->qp_mutex);
+ ib_destroy_qp(id_priv->id.qp);
+ id_priv->id.qp = NULL;
+ mutex_unlock(&id_priv->qp_mutex);
+}
+EXPORT_SYMBOL(rdma_destroy_qp);
+
+static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
+ struct rdma_conn_param *conn_param)
+{
+ struct ib_qp_attr qp_attr;
+ int qp_attr_mask, ret;
+ union ib_gid sgid;
+
+ 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;
+
+ ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
+ qp_attr.ah_attr.grh.sgid_index, &sgid);
+ if (ret)
+ goto out;
+
+ if (rdma_node_get_transport(id_priv->cma_dev->device->node_type)
+ == RDMA_TRANSPORT_IB &&
+ rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)
+ == IB_LINK_LAYER_ETHERNET) {
+ ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
+
+ if (ret)
+ goto out;
+ }
+ 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_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
+ IB_LINK_LAYER_INFINIBAND)
+ pkey = ib_addr_get_pkey(dev_addr);
+ else
+ pkey = 0xffff;
+
+ 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);
+ switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ 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;
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ 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);
+ break;
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(rdma_init_qp_attr);
+
+static inline int cma_zero_addr(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 0;
+ }
+}
+
+static inline int cma_loopback_addr(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 0;
+ }
+}
+
+static inline int cma_any_addr(struct sockaddr *addr)
+{
+ return cma_zero_addr(addr) || cma_loopback_addr(addr);
+}
+
+static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
+{
+ if (src->sa_family != dst->sa_family)
+ return -1;
+
+ switch (src->sa_family) {
+ case AF_INET:
+ return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
+ ((struct sockaddr_in *) dst)->sin_addr.s_addr;
+ case AF_INET6:
+ return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
+ &((struct sockaddr_in6 *) dst)->sin6_addr);
+ default:
+ return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
+ &((struct sockaddr_ib *) dst)->sib_addr);
+ }
+}
+
+static __be16 cma_port(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(struct sockaddr *addr)
+{
+ return !cma_port(addr);
+}
+
+static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
+ struct ib_sa_path_rec *path)
+{
+ struct sockaddr_ib *listen_ib, *ib;
+
+ listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
+ ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
+ ib->sib_family = listen_ib->sib_family;
+ if (path) {
+ ib->sib_pkey = path->pkey;
+ ib->sib_flowinfo = path->flow_label;
+ memcpy(&ib->sib_addr, &path->sgid, 16);
+ } 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_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
+ ib->sib_scope_id = listen_ib->sib_scope_id;
+
+ if (path) {
+ ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
+ ib->sib_family = listen_ib->sib_family;
+ ib->sib_pkey = path->pkey;
+ ib->sib_flowinfo = path->flow_label;
+ memcpy(&ib->sib_addr, &path->dgid, 16);
+ }
+}
+
+static __be16 ss_get_port(const struct sockaddr_storage *ss)
+{
+ if (ss->ss_family == AF_INET)
+ return ((struct sockaddr_in *)ss)->sin_port;
+ else if (ss->ss_family == AF_INET6)
+ return ((struct sockaddr_in6 *)ss)->sin6_port;
+ BUG();
+}
+
+static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
+ struct cma_hdr *hdr)
+{
+ struct sockaddr_in *ip4;
+
+ ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
+ ip4->sin_family = AF_INET;
+ ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
+ ip4->sin_port = ss_get_port(&listen_id->route.addr.src_addr);
+
+ ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
+ ip4->sin_family = AF_INET;
+ ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
+ ip4->sin_port = hdr->port;
+}
+
+static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
+ struct cma_hdr *hdr)
+{
+ struct sockaddr_in6 *ip6;
+
+ ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
+ ip6->sin6_family = AF_INET6;
+ ip6->sin6_addr = hdr->dst_addr.ip6;
+ ip6->sin6_port = ss_get_port(&listen_id->route.addr.src_addr);
+
+ ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
+ ip6->sin6_family = AF_INET6;
+ ip6->sin6_addr = hdr->src_addr.ip6;
+ ip6->sin6_port = hdr->port;
+}
+
+static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
+ struct ib_cm_event *ib_event)
+{
+ struct cma_hdr *hdr;
+
+ if (listen_id->route.addr.src_addr.ss_family == AF_IB) {
+ if (ib_event->event == IB_CM_REQ_RECEIVED)
+ cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
+ else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
+ cma_save_ib_info(id, listen_id, NULL);
+ return 0;
+ }
+
+ hdr = ib_event->private_data;
+ if (hdr->cma_version != CMA_VERSION)
+ return -EINVAL;
+
+ switch (cma_get_ip_ver(hdr)) {
+ case 4:
+ cma_save_ip4_info(id, listen_id, hdr);
+ break;
+ case 6:
+ cma_save_ip6_info(id, listen_id, hdr);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static inline int 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)
+{
+ switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
+ case IB_LINK_LAYER_INFINIBAND:
+ if (id_priv->query)
+ ib_sa_cancel_query(id_priv->query_id, id_priv->query);
+ break;
+ default:
+ break;
+ }
+}
+
+static void cma_cancel_listens(struct rdma_id_private *id_priv)
+{
+ struct rdma_id_private *dev_id_priv;
+
+ /*
+ * Remove from listen_any_list to prevent added devices from spawning
+ * additional listen requests.
+ */
+ mutex_lock(&lock);
+ list_del(&id_priv->list);
+
+ while (!list_empty(&id_priv->listen_list)) {
+ dev_id_priv = list_entry(id_priv->listen_list.next,
+ struct rdma_id_private, listen_list);
+ /* sync with device removal to avoid duplicate destruction */
+ list_del_init(&dev_id_priv->list);
+ list_del(&dev_id_priv->listen_list);
+ mutex_unlock(&lock);
+
+ rdma_destroy_id(&dev_id_priv->id);
+ mutex_lock(&lock);
+ }
+ mutex_unlock(&lock);
+}
+
+static void cma_cancel_operation(struct rdma_id_private *id_priv,
+ enum rdma_cm_state state)
+{
+ switch (state) {
+ case RDMA_CM_ADDR_QUERY:
+ rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
+ break;
+ case RDMA_CM_ROUTE_QUERY:
+ cma_cancel_route(id_priv);
+ break;
+ case RDMA_CM_LISTEN:
+ if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
+ cma_cancel_listens(id_priv);
+ break;
+ default:
+ break;
+ }
+}
+
+static void cma_release_port(struct rdma_id_private *id_priv)
+{
+ struct rdma_bind_list *bind_list = id_priv->bind_list;
+
+ if (!bind_list)
+ return;
+
+ mutex_lock(&lock);
+ hlist_del(&id_priv->node);
+ if (hlist_empty(&bind_list->owners)) {
+ idr_remove(bind_list->ps, bind_list->port);
+ kfree(bind_list);
+ }
+ mutex_unlock(&lock);
+}
+
+static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
+{
+ struct cma_multicast *mc;
+
+ while (!list_empty(&id_priv->mc_list)) {
+ mc = container_of(id_priv->mc_list.next,
+ struct cma_multicast, list);
+ list_del(&mc->list);
+ switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
+ case IB_LINK_LAYER_INFINIBAND:
+ ib_sa_free_multicast(mc->multicast.ib);
+ kfree(mc);
+ break;
+ case IB_LINK_LAYER_ETHERNET:
+ kref_put(&mc->mcref, release_mc);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+void rdma_destroy_id(struct rdma_cm_id *id)
+{
+ struct rdma_id_private *id_priv;
+ enum rdma_cm_state state;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ state = cma_exch(id_priv, RDMA_CM_DESTROYING);
+ cma_cancel_operation(id_priv, state);
+
+ /*
+ * Wait for any active callback to finish. New callbacks will find
+ * the id_priv state set to destroying and abort.
+ */
+ mutex_lock(&id_priv->handler_mutex);
+ mutex_unlock(&id_priv->handler_mutex);
+
+ if (id_priv->cma_dev) {
+ switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ if (id_priv->cm_id.ib)
+ ib_destroy_cm_id(id_priv->cm_id.ib);
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ if (id_priv->cm_id.iw)
+ iw_destroy_cm_id(id_priv->cm_id.iw);
+ break;
+ default:
+ break;
+ }
+ cma_leave_mc_groups(id_priv);
+ cma_release_dev(id_priv);
+ }
+
+ cma_release_port(id_priv);
+ cma_deref_id(id_priv);
+ wait_for_completion(&id_priv->comp);
+
+ if (id_priv->internal_id)
+ cma_deref_id(id_priv->id.context);
+
+ kfree(id_priv->id.route.path_rec);
+ kfree(id_priv);
+}
+EXPORT_SYMBOL(rdma_destroy_id);
+
+static int cma_rep_recv(struct rdma_id_private *id_priv)
+{
+ int ret;
+
+ ret = cma_modify_qp_rtr(id_priv, NULL);
+ if (ret)
+ goto reject;
+
+ ret = cma_modify_qp_rts(id_priv, NULL);
+ if (ret)
+ goto reject;
+
+ ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
+ if (ret)
+ goto reject;
+
+ return 0;
+reject:
+ cma_modify_qp_err(id_priv);
+ ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
+ NULL, 0, NULL, 0);
+ return ret;
+}
+
+static void cma_set_rep_event_data(struct rdma_cm_event *event,
+ struct ib_cm_rep_event_param *rep_data,
+ void *private_data)
+{
+ event->param.conn.private_data = private_data;
+ event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
+ event->param.conn.responder_resources = rep_data->responder_resources;
+ event->param.conn.initiator_depth = rep_data->initiator_depth;
+ event->param.conn.flow_control = rep_data->flow_control;
+ event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
+ event->param.conn.srq = rep_data->srq;
+ event->param.conn.qp_num = rep_data->remote_qpn;
+}
+
+static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
+{
+ struct rdma_id_private *id_priv = cm_id->context;
+ struct rdma_cm_event event;
+ int ret = 0;
+
+ if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
+ cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
+ (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
+ cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
+ return 0;
+
+ memset(&event, 0, sizeof event);
+ 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 (id_priv->id.qp) {
+ event.status = cma_rep_recv(id_priv);
+ event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
+ RDMA_CM_EVENT_ESTABLISHED;
+ } else {
+ event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
+ }
+ cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
+ ib_event->private_data);
+ break;
+ case IB_CM_RTU_RECEIVED:
+ case IB_CM_USER_ESTABLISHED:
+ event.event = RDMA_CM_EVENT_ESTABLISHED;
+ break;
+ case IB_CM_DREQ_ERROR:
+ event.status = -ETIMEDOUT; /* fall through */
+ case IB_CM_DREQ_RECEIVED:
+ case IB_CM_DREP_RECEIVED:
+ if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
+ RDMA_CM_DISCONNECT))
+ goto out;
+ event.event = RDMA_CM_EVENT_DISCONNECTED;
+ break;
+ case IB_CM_TIMEWAIT_EXIT:
+ event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
+ break;
+ case IB_CM_MRA_RECEIVED:
+ /* ignore event */
+ goto out;
+ case IB_CM_REJ_RECEIVED:
+ 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:
+ printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
+ ib_event->event);
+ goto out;
+ }
+
+ ret = id_priv->id.event_handler(&id_priv->id, &event);
+ if (ret) {
+ /* Destroy the CM ID by returning a non-zero value. */
+ id_priv->cm_id.ib = NULL;
+ cma_exch(id_priv, RDMA_CM_DESTROYING);
+ mutex_unlock(&id_priv->handler_mutex);
+ rdma_destroy_id(&id_priv->id);
+ return ret;
+ }
+out:
+ mutex_unlock(&id_priv->handler_mutex);
+ return ret;
+}
+
+static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
+ struct ib_cm_event *ib_event)
+{
+ struct rdma_id_private *id_priv;
+ struct rdma_cm_id *id;
+ struct rdma_route *rt;
+ int ret;
+
+ id = rdma_create_id(listen_id->event_handler, listen_id->context,
+ listen_id->ps, ib_event->param.req_rcvd.qp_type);
+ if (IS_ERR(id))
+ return NULL;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (cma_save_net_info(id, listen_id, ib_event))
+ goto err;
+
+ rt = &id->route;
+ rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
+ rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
+ GFP_KERNEL);
+ if (!rt->path_rec)
+ goto err;
+
+ rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
+ if (rt->num_paths == 2)
+ rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
+
+ if (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 {
+ 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_new_udp_id(struct rdma_cm_id *listen_id,
+ struct ib_cm_event *ib_event)
+{
+ struct rdma_id_private *id_priv;
+ struct rdma_cm_id *id;
+ int ret;
+
+ id = rdma_create_id(listen_id->event_handler, listen_id->context,
+ listen_id->ps, IB_QPT_UD);
+ if (IS_ERR(id))
+ return NULL;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (cma_save_net_info(id, listen_id, ib_event))
+ goto err;
+
+ if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
+ 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,
+ struct ib_cm_req_event_param *req_data,
+ void *private_data, int offset)
+{
+ event->param.conn.private_data = private_data + offset;
+ event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
+ event->param.conn.responder_resources = req_data->responder_resources;
+ event->param.conn.initiator_depth = req_data->initiator_depth;
+ event->param.conn.flow_control = req_data->flow_control;
+ event->param.conn.retry_count = req_data->retry_count;
+ event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
+ event->param.conn.srq = req_data->srq;
+ event->param.conn.qp_num = req_data->remote_qpn;
+}
+
+static int cma_check_req_qp_type(struct rdma_cm_id *id, 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_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
+{
+ struct rdma_id_private *listen_id, *conn_id;
+ struct rdma_cm_event event;
+ int offset, ret;
+
+ listen_id = cm_id->context;
+ if (!cma_check_req_qp_type(&listen_id->id, ib_event))
+ return -EINVAL;
+
+ if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
+ return -ECONNABORTED;
+
+ memset(&event, 0, sizeof event);
+ 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_new_udp_id(&listen_id->id, ib_event);
+ 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_new_conn_id(&listen_id->id, ib_event);
+ cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
+ ib_event->private_data, offset);
+ }
+ if (!conn_id) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
+ ret = cma_acquire_dev(conn_id, listen_id);
+ if (ret)
+ goto err2;
+
+ conn_id->cm_id.ib = cm_id;
+ cm_id->context = conn_id;
+ cm_id->cm_handler = cma_ib_handler;
+
+ /*
+ * Protect against the user destroying conn_id from another thread
+ * until we're done accessing it.
+ */
+ atomic_inc(&conn_id->refcount);
+ ret = conn_id->id.event_handler(&conn_id->id, &event);
+ if (ret)
+ goto err3;
+ /*
+ * Acquire mutex to prevent user executing rdma_destroy_id()
+ * while we're accessing the cm_id.
+ */
+ mutex_lock(&lock);
+ if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
+ (conn_id->id.qp_type != IB_QPT_UD))
+ ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
+ mutex_unlock(&lock);
+ mutex_unlock(&conn_id->handler_mutex);
+ mutex_unlock(&listen_id->handler_mutex);
+ cma_deref_id(conn_id);
+ return 0;
+
+err3:
+ cma_deref_id(conn_id);
+ /* Destroy the CM ID by returning a non-zero value. */
+ conn_id->cm_id.ib = NULL;
+err2:
+ cma_exch(conn_id, RDMA_CM_DESTROYING);
+ mutex_unlock(&conn_id->handler_mutex);
+err1:
+ mutex_unlock(&listen_id->handler_mutex);
+ if (conn_id)
+ rdma_destroy_id(&conn_id->id);
+ 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);
+
+static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
+ struct ib_cm_compare_data *compare)
+{
+ struct cma_hdr *cma_data, *cma_mask;
+ __be32 ip4_addr;
+ struct in6_addr ip6_addr;
+
+ memset(compare, 0, sizeof *compare);
+ cma_data = (void *) compare->data;
+ cma_mask = (void *) compare->mask;
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
+ cma_set_ip_ver(cma_data, 4);
+ cma_set_ip_ver(cma_mask, 0xF);
+ if (!cma_any_addr(addr)) {
+ cma_data->dst_addr.ip4.addr = ip4_addr;
+ cma_mask->dst_addr.ip4.addr = htonl(~0);
+ }
+ break;
+ case AF_INET6:
+ ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
+ cma_set_ip_ver(cma_data, 6);
+ cma_set_ip_ver(cma_mask, 0xF);
+ if (!cma_any_addr(addr)) {
+ cma_data->dst_addr.ip6 = ip6_addr;
+ memset(&cma_mask->dst_addr.ip6, 0xFF,
+ sizeof cma_mask->dst_addr.ip6);
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+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;
+
+ if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
+ return 0;
+
+ memset(&event, 0, sizeof event);
+ 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:
+ BUG_ON(1);
+ }
+
+ event.status = iw_event->status;
+ event.param.conn.private_data = iw_event->private_data;
+ event.param.conn.private_data_len = iw_event->private_data_len;
+ ret = id_priv->id.event_handler(&id_priv->id, &event);
+ if (ret) {
+ /* Destroy the CM ID by returning a non-zero value. */
+ id_priv->cm_id.iw = NULL;
+ cma_exch(id_priv, RDMA_CM_DESTROYING);
+ mutex_unlock(&id_priv->handler_mutex);
+ rdma_destroy_id(&id_priv->id);
+ return ret;
+ }
+
+ mutex_unlock(&id_priv->handler_mutex);
+ return ret;
+}
+
+static int iw_conn_req_handler(struct iw_cm_id *cm_id,
+ struct iw_cm_event *iw_event)
+{
+ struct rdma_cm_id *new_cm_id;
+ struct rdma_id_private *listen_id, *conn_id;
+ struct rdma_cm_event event;
+ int ret;
+ struct ib_device_attr attr;
+ struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
+ struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
+
+ listen_id = cm_id->context;
+ if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
+ return -ECONNABORTED;
+
+ /* Create a new RDMA id for the new IW CM ID */
+ new_cm_id = rdma_create_id(listen_id->id.event_handler,
+ listen_id->id.context,
+ RDMA_PS_TCP, IB_QPT_RC);
+ if (IS_ERR(new_cm_id)) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ conn_id = container_of(new_cm_id, struct rdma_id_private, id);
+ mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
+ conn_id->state = RDMA_CM_CONNECT;
+
+ ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
+ if (ret) {
+ mutex_unlock(&conn_id->handler_mutex);
+ rdma_destroy_id(new_cm_id);
+ goto out;
+ }
+
+ ret = cma_acquire_dev(conn_id, listen_id);
+ if (ret) {
+ mutex_unlock(&conn_id->handler_mutex);
+ rdma_destroy_id(new_cm_id);
+ goto out;
+ }
+
+ conn_id->cm_id.iw = cm_id;
+ cm_id->context = conn_id;
+ cm_id->cm_handler = cma_iw_handler;
+
+ memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
+ memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
+
+ ret = ib_query_device(conn_id->id.device, &attr);
+ if (ret) {
+ mutex_unlock(&conn_id->handler_mutex);
+ rdma_destroy_id(new_cm_id);
+ goto out;
+ }
+
+ memset(&event, 0, sizeof event);
+ 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;
+
+ /*
+ * Protect against the user destroying conn_id from another thread
+ * until we're done accessing it.
+ */
+ atomic_inc(&conn_id->refcount);
+ ret = conn_id->id.event_handler(&conn_id->id, &event);
+ if (ret) {
+ /* User wants to destroy the CM ID */
+ conn_id->cm_id.iw = NULL;
+ cma_exch(conn_id, RDMA_CM_DESTROYING);
+ mutex_unlock(&conn_id->handler_mutex);
+ cma_deref_id(conn_id);
+ rdma_destroy_id(&conn_id->id);
+ goto out;
+ }
+
+ mutex_unlock(&conn_id->handler_mutex);
+ cma_deref_id(conn_id);
+
+out:
+ mutex_unlock(&listen_id->handler_mutex);
+ return ret;
+}
+
+static int cma_ib_listen(struct rdma_id_private *id_priv)
+{
+ struct ib_cm_compare_data compare_data;
+ struct sockaddr *addr;
+ struct ib_cm_id *id;
+ __be64 svc_id;
+ int ret;
+
+ id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
+ if (IS_ERR(id))
+ return PTR_ERR(id);
+
+ id_priv->cm_id.ib = id;
+
+ addr = cma_src_addr(id_priv);
+ svc_id = rdma_get_service_id(&id_priv->id, addr);
+ if (cma_any_addr(addr) && !id_priv->afonly)
+ ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
+ else {
+ cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
+ ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
+ }
+
+ if (ret) {
+ ib_destroy_cm_id(id_priv->cm_id.ib);
+ id_priv->cm_id.ib = NULL;
+ }
+
+ return ret;
+}
+
+static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
+{
+ int ret;
+ struct iw_cm_id *id;
+
+ id = iw_create_cm_id(id_priv->id.device,
+ iw_conn_req_handler,
+ id_priv);
+ if (IS_ERR(id))
+ return PTR_ERR(id);
+
+ id_priv->cm_id.iw = id;
+
+ memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
+ rdma_addr_size(cma_src_addr(id_priv)));
+
+ ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
+
+ if (ret) {
+ iw_destroy_cm_id(id_priv->cm_id.iw);
+ id_priv->cm_id.iw = NULL;
+ }
+
+ return ret;
+}
+
+static int cma_listen_handler(struct rdma_cm_id *id,
+ struct rdma_cm_event *event)
+{
+ struct rdma_id_private *id_priv = id->context;
+
+ id->context = id_priv->id.context;
+ id->event_handler = id_priv->id.event_handler;
+ return id_priv->id.event_handler(id, event);
+}
+
+static void cma_listen_on_dev(struct rdma_id_private *id_priv,
+ struct cma_device *cma_dev)
+{
+ struct rdma_id_private *dev_id_priv;
+ struct rdma_cm_id *id;
+ int ret;
+
+ if (cma_family(id_priv) == AF_IB &&
+ rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
+ return;
+
+ id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
+ id_priv->id.qp_type);
+ if (IS_ERR(id))
+ return;
+
+ dev_id_priv = container_of(id, struct rdma_id_private, id);
+
+ dev_id_priv->state = RDMA_CM_ADDR_BOUND;
+ memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
+ rdma_addr_size(cma_src_addr(id_priv)));
+
+ cma_attach_to_dev(dev_id_priv, cma_dev);
+ list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
+ atomic_inc(&id_priv->refcount);
+ dev_id_priv->internal_id = 1;
+ dev_id_priv->afonly = id_priv->afonly;
+
+ ret = rdma_listen(id, id_priv->backlog);
+ if (ret)
+ printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
+ "listening on device %s\n", ret, cma_dev->device->name);
+}
+
+static void cma_listen_on_all(struct rdma_id_private *id_priv)
+{
+ struct cma_device *cma_dev;
+
+ mutex_lock(&lock);
+ list_add_tail(&id_priv->list, &listen_any_list);
+ list_for_each_entry(cma_dev, &dev_list, list)
+ cma_listen_on_dev(id_priv, cma_dev);
+ mutex_unlock(&lock);
+}
+
+void rdma_set_service_type(struct rdma_cm_id *id, int tos)
+{
+ struct rdma_id_private *id_priv;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ id_priv->tos = (u8) tos;
+}
+EXPORT_SYMBOL(rdma_set_service_type);
+
+static void cma_query_handler(int status, struct ib_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;
+ }
+
+ queue_work(cma_wq, &work->work);
+}
+
+static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
+ struct cma_work *work)
+{
+ struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
+ struct ib_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);
+ rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
+ rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
+ path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
+ path_rec.numb_path = 1;
+ path_rec.reversible = 1;
+ path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
+
+ comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
+ IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
+ IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
+
+ switch (cma_family(id_priv)) {
+ case AF_INET:
+ path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
+ comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
+ break;
+ case AF_INET6:
+ sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
+ path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
+ comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
+ break;
+ case AF_IB:
+ sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
+ path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
+ comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
+ break;
+ }
+
+ id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
+ id_priv->id.port_num, &path_rec,
+ comp_mask, timeout_ms,
+ GFP_KERNEL, cma_query_handler,
+ work, &id_priv->query);
+
+ return (id_priv->query_id < 0) ? id_priv->query_id : 0;
+}
+
+static void cma_work_handler(struct work_struct *_work)
+{
+ struct cma_work *work = container_of(_work, struct cma_work, work);
+ struct rdma_id_private *id_priv = work->id;
+ int destroy = 0;
+
+ mutex_lock(&id_priv->handler_mutex);
+ if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
+ goto out;
+
+ if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
+ cma_exch(id_priv, RDMA_CM_DESTROYING);
+ destroy = 1;
+ }
+out:
+ mutex_unlock(&id_priv->handler_mutex);
+ cma_deref_id(id_priv);
+ if (destroy)
+ rdma_destroy_id(&id_priv->id);
+ kfree(work);
+}
+
+static void cma_ndev_work_handler(struct work_struct *_work)
+{
+ struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
+ struct rdma_id_private *id_priv = work->id;
+ int destroy = 0;
+
+ mutex_lock(&id_priv->handler_mutex);
+ if (id_priv->state == RDMA_CM_DESTROYING ||
+ id_priv->state == RDMA_CM_DEVICE_REMOVAL)
+ goto out;
+
+ if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
+ cma_exch(id_priv, RDMA_CM_DESTROYING);
+ destroy = 1;
+ }
+
+out:
+ mutex_unlock(&id_priv->handler_mutex);
+ cma_deref_id(id_priv);
+ if (destroy)
+ rdma_destroy_id(&id_priv->id);
+ kfree(work);
+}
+
+static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int 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;
+
+ 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;
+
+ 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;
+}
+
+int rdma_set_ib_paths(struct rdma_cm_id *id,
+ struct ib_sa_path_rec *path_rec, int num_paths)
+{
+ 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_RESOLVED))
+ return -EINVAL;
+
+ id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
+ GFP_KERNEL);
+ if (!id->route.path_rec) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ id->route.num_paths = num_paths;
+ return 0;
+err:
+ cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_set_ib_paths);
+
+static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
+{
+ struct cma_work *work;
+
+ work = kzalloc(sizeof *work, GFP_KERNEL);
+ if (!work)
+ return -ENOMEM;
+
+ 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;
+ queue_work(cma_wq, &work->work);
+ return 0;
+}
+
+static int iboe_tos_to_sl(struct net_device *ndev, int tos)
+{
+ int prio;
+ struct net_device *dev;
+
+ prio = rt_tos2priority(tos);
+ dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
+ vlan_dev_real_dev(ndev) : ndev;
+
+ if (dev->num_tc)
+ return netdev_get_prio_tc_map(dev, prio);
+
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+ if (ndev->priv_flags & IFF_802_1Q_VLAN)
+ return (vlan_dev_get_egress_qos_mask(ndev, prio) &
+ VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+#endif
+ return 0;
+}
+
+static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
+{
+ struct rdma_route *route = &id_priv->id.route;
+ struct rdma_addr *addr = &route->addr;
+ struct cma_work *work;
+ int ret;
+ struct net_device *ndev = NULL;
+
+
+ work = kzalloc(sizeof *work, GFP_KERNEL);
+ if (!work)
+ return -ENOMEM;
+
+ work->id = id_priv;
+ INIT_WORK(&work->work, cma_work_handler);
+
+ route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
+ if (!route->path_rec) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ route->num_paths = 1;
+
+ if (addr->dev_addr.bound_dev_if)
+ ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
+ if (!ndev) {
+ ret = -ENODEV;
+ goto err2;
+ }
+
+ route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev);
+ memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
+ memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len);
+
+ 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);
+
+ 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, id_priv->tos);
+ route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
+ route->path_rec->rate_selector = IB_SA_EQ;
+ route->path_rec->rate = iboe_get_rate(ndev);
+ dev_put(ndev);
+ route->path_rec->packet_life_time_selector = IB_SA_EQ;
+ route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
+ if (!route->path_rec->mtu) {
+ ret = -EINVAL;
+ goto err2;
+ }
+
+ work->old_state = RDMA_CM_ROUTE_QUERY;
+ work->new_state = RDMA_CM_ROUTE_RESOLVED;
+ work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
+ work->event.status = 0;
+
+ queue_work(cma_wq, &work->work);
+
+ return 0;
+
+err2:
+ kfree(route->path_rec);
+ route->path_rec = NULL;
+err1:
+ kfree(work);
+ return ret;
+}
+
+int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
+ return -EINVAL;
+
+ atomic_inc(&id_priv->refcount);
+ switch (rdma_node_get_transport(id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ switch (rdma_port_get_link_layer(id->device, id->port_num)) {
+ case IB_LINK_LAYER_INFINIBAND:
+ ret = cma_resolve_ib_route(id_priv, timeout_ms);
+ break;
+ case IB_LINK_LAYER_ETHERNET:
+ ret = cma_resolve_iboe_route(id_priv);
+ break;
+ default:
+ ret = -ENOSYS;
+ }
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ ret = cma_resolve_iw_route(id_priv, timeout_ms);
+ break;
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
+ cma_deref_id(id_priv);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_resolve_route);
+
+static void cma_set_loopback(struct sockaddr *addr)
+{
+ switch (addr->sa_family) {
+ case AF_INET:
+ ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ break;
+ case AF_INET6:
+ ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
+ 0, 0, 0, htonl(1));
+ break;
+ default:
+ ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
+ 0, 0, 0, htonl(1));
+ break;
+ }
+}
+
+static int cma_bind_loopback(struct rdma_id_private *id_priv)
+{
+ struct cma_device *cma_dev, *cur_dev;
+ struct ib_port_attr port_attr;
+ union ib_gid gid;
+ u16 pkey;
+ int ret;
+ u8 p;
+
+ cma_dev = NULL;
+ mutex_lock(&lock);
+ list_for_each_entry(cur_dev, &dev_list, list) {
+ if (cma_family(id_priv) == AF_IB &&
+ rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
+ continue;
+
+ if (!cma_dev)
+ cma_dev = cur_dev;
+
+ for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
+ if (!ib_query_port(cur_dev->device, p, &port_attr) &&
+ port_attr.state == IB_PORT_ACTIVE) {
+ cma_dev = cur_dev;
+ goto port_found;
+ }
+ }
+ }
+
+ if (!cma_dev) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ p = 1;
+
+port_found:
+ ret = ib_get_cached_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_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
+ ARPHRD_INFINIBAND : ARPHRD_ETHER;
+
+ rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
+ ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
+ id_priv->id.port_num = p;
+ cma_attach_to_dev(id_priv, cma_dev);
+ cma_set_loopback(cma_src_addr(id_priv));
+out:
+ mutex_unlock(&lock);
+ return ret;
+}
+
+static void addr_handler(int status, struct sockaddr *src_addr,
+ struct rdma_dev_addr *dev_addr, void *context)
+{
+ struct rdma_id_private *id_priv = context;
+ struct rdma_cm_event event;
+
+ memset(&event, 0, sizeof event);
+ mutex_lock(&id_priv->handler_mutex);
+ if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
+ RDMA_CM_ADDR_RESOLVED))
+ goto out;
+
+ memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
+ if (!status && !id_priv->cma_dev)
+ status = cma_acquire_dev(id_priv, NULL);
+
+ if (status) {
+ if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
+ RDMA_CM_ADDR_BOUND))
+ goto out;
+ event.event = RDMA_CM_EVENT_ADDR_ERROR;
+ event.status = status;
+ } else
+ event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
+
+ if (id_priv->id.event_handler(&id_priv->id, &event)) {
+ cma_exch(id_priv, RDMA_CM_DESTROYING);
+ mutex_unlock(&id_priv->handler_mutex);
+ cma_deref_id(id_priv);
+ rdma_destroy_id(&id_priv->id);
+ return;
+ }
+out:
+ mutex_unlock(&id_priv->handler_mutex);
+ cma_deref_id(id_priv);
+}
+
+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);
+
+ 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);
+ 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));
+
+ 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);
+ return 0;
+err:
+ kfree(work);
+ return ret;
+}
+
+static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
+ struct sockaddr *dst_addr)
+{
+ if (!src_addr || !src_addr->sa_family) {
+ src_addr = (struct sockaddr *) &id->route.addr.src_addr;
+ src_addr->sa_family = dst_addr->sa_family;
+ if (dst_addr->sa_family == AF_INET6) {
+ ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
+ ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
+ } else if (dst_addr->sa_family == AF_IB) {
+ ((struct sockaddr_ib *) src_addr)->sib_pkey =
+ ((struct sockaddr_ib *) dst_addr)->sib_pkey;
+ }
+ }
+ return rdma_bind_addr(id, src_addr);
+}
+
+int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
+ struct sockaddr *dst_addr, int timeout_ms)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (id_priv->state == RDMA_CM_IDLE) {
+ ret = cma_bind_addr(id, src_addr, dst_addr);
+ if (ret)
+ return ret;
+ }
+
+ if (cma_family(id_priv) != dst_addr->sa_family)
+ return -EINVAL;
+
+ if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
+ return -EINVAL;
+
+ atomic_inc(&id_priv->refcount);
+ memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
+ if (cma_any_addr(dst_addr)) {
+ ret = cma_resolve_loopback(id_priv);
+ } else {
+ if (dst_addr->sa_family == AF_IB) {
+ ret = cma_resolve_ib_addr(id_priv);
+ } else {
+ ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
+ dst_addr, &id->route.addr.dev_addr,
+ timeout_ms, addr_handler, id_priv);
+ }
+ }
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
+ cma_deref_id(id_priv);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_resolve_addr);
+
+int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
+{
+ struct rdma_id_private *id_priv;
+ unsigned long flags;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ spin_lock_irqsave(&id_priv->lock, flags);
+ if (reuse || id_priv->state == RDMA_CM_IDLE) {
+ id_priv->reuseaddr = reuse;
+ ret = 0;
+ } else {
+ ret = -EINVAL;
+ }
+ spin_unlock_irqrestore(&id_priv->lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_set_reuseaddr);
+
+int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
+{
+ struct rdma_id_private *id_priv;
+ unsigned long flags;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ spin_lock_irqsave(&id_priv->lock, flags);
+ if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
+ id_priv->options |= (1 << CMA_OPTION_AFONLY);
+ id_priv->afonly = afonly;
+ ret = 0;
+ } else {
+ ret = -EINVAL;
+ }
+ spin_unlock_irqrestore(&id_priv->lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_set_afonly);
+
+static void cma_bind_port(struct rdma_bind_list *bind_list,
+ struct rdma_id_private *id_priv)
+{
+ struct sockaddr *addr;
+ struct sockaddr_ib *sib;
+ u64 sid, mask;
+ __be16 port;
+
+ addr = cma_src_addr(id_priv);
+ port = htons(bind_list->port);
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ ((struct sockaddr_in *) addr)->sin_port = port;
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *) addr)->sin6_port = port;
+ break;
+ case AF_IB:
+ sib = (struct sockaddr_ib *) addr;
+ sid = be64_to_cpu(sib->sib_sid);
+ mask = be64_to_cpu(sib->sib_sid_mask);
+ sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
+ sib->sib_sid_mask = cpu_to_be64(~0ULL);
+ break;
+ }
+ id_priv->bind_list = bind_list;
+ hlist_add_head(&id_priv->node, &bind_list->owners);
+}
+
+static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
+ unsigned short snum)
+{
+ struct rdma_bind_list *bind_list;
+ int ret;
+
+ bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
+ if (!bind_list)
+ return -ENOMEM;
+
+ ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
+ if (ret < 0)
+ goto err;
+
+ bind_list->ps = ps;
+ bind_list->port = (unsigned short)ret;
+ cma_bind_port(bind_list, id_priv);
+ return 0;
+err:
+ kfree(bind_list);
+ return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
+}
+
+static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
+{
+ static unsigned int last_used_port;
+ int low, high, remaining;
+ unsigned int rover;
+
+ inet_get_local_port_range(&init_net, &low, &high);
+ remaining = (high - low) + 1;
+ rover = prandom_u32() % remaining + low;
+retry:
+ if (last_used_port != rover &&
+ !idr_find(ps, (unsigned short) rover)) {
+ int ret = cma_alloc_port(ps, id_priv, rover);
+ /*
+ * Remember previously used port number in order to avoid
+ * re-using same port immediately after it is closed.
+ */
+ if (!ret)
+ last_used_port = rover;
+ if (ret != -EADDRNOTAVAIL)
+ return ret;
+ }
+ if (--remaining) {
+ rover++;
+ if ((rover < low) || (rover > high))
+ rover = low;
+ goto retry;
+ }
+ return -EADDRNOTAVAIL;
+}
+
+/*
+ * Check that the requested port is available. This is called when trying to
+ * bind to a specific port, or when trying to listen on a bound port. In
+ * the latter case, the provided id_priv may already be on the bind_list, but
+ * we still need to check that it's okay to start listening.
+ */
+static int cma_check_port(struct rdma_bind_list *bind_list,
+ struct rdma_id_private *id_priv, uint8_t reuseaddr)
+{
+ struct rdma_id_private *cur_id;
+ struct sockaddr *addr, *cur_addr;
+
+ addr = cma_src_addr(id_priv);
+ hlist_for_each_entry(cur_id, &bind_list->owners, node) {
+ if (id_priv == cur_id)
+ continue;
+
+ if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
+ cur_id->reuseaddr)
+ continue;
+
+ cur_addr = cma_src_addr(cur_id);
+ if (id_priv->afonly && cur_id->afonly &&
+ (addr->sa_family != cur_addr->sa_family))
+ continue;
+
+ if (cma_any_addr(addr) || cma_any_addr(cur_addr))
+ return -EADDRNOTAVAIL;
+
+ if (!cma_addr_cmp(addr, cur_addr))
+ return -EADDRINUSE;
+ }
+ return 0;
+}
+
+static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
+{
+ struct rdma_bind_list *bind_list;
+ unsigned short snum;
+ int ret;
+
+ snum = ntohs(cma_port(cma_src_addr(id_priv)));
+ if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
+ return -EACCES;
+
+ bind_list = idr_find(ps, snum);
+ if (!bind_list) {
+ ret = cma_alloc_port(ps, id_priv, snum);
+ } else {
+ ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
+ if (!ret)
+ cma_bind_port(bind_list, id_priv);
+ }
+ return ret;
+}
+
+static int cma_bind_listen(struct rdma_id_private *id_priv)
+{
+ struct rdma_bind_list *bind_list = id_priv->bind_list;
+ int ret = 0;
+
+ mutex_lock(&lock);
+ if (bind_list->owners.first->next)
+ ret = cma_check_port(bind_list, id_priv, 0);
+ mutex_unlock(&lock);
+ return ret;
+}
+
+static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
+{
+ switch (id_priv->id.ps) {
+ case RDMA_PS_TCP:
+ return &tcp_ps;
+ case RDMA_PS_UDP:
+ return &udp_ps;
+ case RDMA_PS_IPOIB:
+ return &ipoib_ps;
+ case RDMA_PS_IB:
+ return &ib_ps;
+ default:
+ return NULL;
+ }
+}
+
+static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
+{
+ struct idr *ps = NULL;
+ 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 = &ib_ps;
+ } 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 = &tcp_ps;
+ } 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 = &udp_ps;
+ }
+
+ 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)
+{
+ struct idr *ps;
+ int ret;
+
+ if (cma_family(id_priv) != AF_IB)
+ ps = cma_select_inet_ps(id_priv);
+ else
+ ps = cma_select_ib_ps(id_priv);
+ if (!ps)
+ return -EPROTONOSUPPORT;
+
+ mutex_lock(&lock);
+ if (cma_any_port(cma_src_addr(id_priv)))
+ ret = cma_alloc_any_port(ps, id_priv);
+ else
+ ret = cma_use_port(ps, id_priv);
+ mutex_unlock(&lock);
+
+ return ret;
+}
+
+static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
+ struct sockaddr *addr)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ struct sockaddr_in6 *sin6;
+
+ if (addr->sa_family != AF_INET6)
+ return 0;
+
+ sin6 = (struct sockaddr_in6 *) addr;
+
+ if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
+ return 0;
+
+ if (!sin6->sin6_scope_id)
+ return -EINVAL;
+
+ dev_addr->bound_dev_if = sin6->sin6_scope_id;
+#endif
+ return 0;
+}
+
+int rdma_listen(struct rdma_cm_id *id, int backlog)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (id_priv->state == RDMA_CM_IDLE) {
+ id->route.addr.src_addr.ss_family = AF_INET;
+ ret = rdma_bind_addr(id, cma_src_addr(id_priv));
+ if (ret)
+ return ret;
+ }
+
+ if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
+ return -EINVAL;
+
+ if (id_priv->reuseaddr) {
+ ret = cma_bind_listen(id_priv);
+ if (ret)
+ goto err;
+ }
+
+ id_priv->backlog = backlog;
+ if (id->device) {
+ switch (rdma_node_get_transport(id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ ret = cma_ib_listen(id_priv);
+ if (ret)
+ goto err;
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ ret = cma_iw_listen(id_priv, backlog);
+ if (ret)
+ goto err;
+ break;
+ default:
+ ret = -ENOSYS;
+ goto err;
+ }
+ } else
+ cma_listen_on_all(id_priv);
+
+ return 0;
+err:
+ id_priv->backlog = 0;
+ cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_listen);
+
+int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ 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(id_priv, NULL);
+ 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)
+ id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
+#endif
+ }
+ ret = cma_get_port(id_priv);
+ if (ret)
+ goto err2;
+
+ 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,
+ struct ib_cm_event *ib_event)
+{
+ struct rdma_id_private *id_priv = cm_id->context;
+ struct rdma_cm_event event;
+ struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
+ int ret = 0;
+
+ if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
+ return 0;
+
+ memset(&event, 0, sizeof event);
+ 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;
+ break;
+ }
+ ret = cma_set_qkey(id_priv, rep->qkey);
+ if (ret) {
+ event.event = RDMA_CM_EVENT_ADDR_ERROR;
+ event.status = ret;
+ break;
+ }
+ ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
+ id_priv->id.route.path_rec,
+ &event.param.ud.ah_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:
+ printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
+ ib_event->event);
+ goto out;
+ }
+
+ ret = id_priv->id.event_handler(&id_priv->id, &event);
+ if (ret) {
+ /* Destroy the CM ID by returning a non-zero value. */
+ id_priv->cm_id.ib = NULL;
+ cma_exch(id_priv, RDMA_CM_DESTROYING);
+ mutex_unlock(&id_priv->handler_mutex);
+ rdma_destroy_id(&id_priv->id);
+ return ret;
+ }
+out:
+ mutex_unlock(&id_priv->handler_mutex);
+ return ret;
+}
+
+static 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;
+ int offset, 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.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
+ req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
+ req.max_cm_retries = CMA_MAX_CM_RETRIES;
+
+ ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
+ if (ret) {
+ ib_destroy_cm_id(id_priv->cm_id.ib);
+ id_priv->cm_id.ib = NULL;
+ }
+out:
+ kfree(private_data);
+ return ret;
+}
+
+static int cma_connect_ib(struct rdma_id_private *id_priv,
+ struct rdma_conn_param *conn_param)
+{
+ struct ib_cm_req_param req;
+ struct rdma_route *route;
+ void *private_data;
+ struct ib_cm_id *id;
+ int offset, 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.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
+ req.qp_num = id_priv->qp_num;
+ req.qp_type = id_priv->id.qp_type;
+ req.starting_psn = id_priv->seq_num;
+ req.responder_resources = conn_param->responder_resources;
+ req.initiator_depth = conn_param->initiator_depth;
+ req.flow_control = conn_param->flow_control;
+ req.retry_count = min_t(u8, 7, conn_param->retry_count);
+ req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
+ req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
+ req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
+ req.max_cm_retries = CMA_MAX_CM_RETRIES;
+ req.srq = id_priv->srq ? 1 : 0;
+
+ ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
+out:
+ if (ret && !IS_ERR(id)) {
+ ib_destroy_cm_id(id);
+ id_priv->cm_id.ib = NULL;
+ }
+
+ kfree(private_data);
+ return ret;
+}
+
+static int cma_connect_iw(struct rdma_id_private *id_priv,
+ struct rdma_conn_param *conn_param)
+{
+ struct iw_cm_id *cm_id;
+ int ret;
+ struct iw_cm_conn_param iw_param;
+
+ cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
+ if (IS_ERR(cm_id))
+ return PTR_ERR(cm_id);
+
+ id_priv->cm_id.iw = cm_id;
+
+ memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
+ rdma_addr_size(cma_src_addr(id_priv)));
+ memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
+ rdma_addr_size(cma_dst_addr(id_priv)));
+
+ ret = cma_modify_qp_rtr(id_priv, conn_param);
+ if (ret)
+ goto out;
+
+ if (conn_param) {
+ iw_param.ord = conn_param->initiator_depth;
+ iw_param.ird = conn_param->responder_resources;
+ iw_param.private_data = conn_param->private_data;
+ iw_param.private_data_len = conn_param->private_data_len;
+ iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
+ } else {
+ memset(&iw_param, 0, sizeof iw_param);
+ iw_param.qpn = id_priv->qp_num;
+ }
+ ret = iw_cm_connect(cm_id, &iw_param);
+out:
+ if (ret) {
+ iw_destroy_cm_id(cm_id);
+ id_priv->cm_id.iw = NULL;
+ }
+ return ret;
+}
+
+int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
+ return -EINVAL;
+
+ if (!id->qp) {
+ id_priv->qp_num = conn_param->qp_num;
+ id_priv->srq = conn_param->srq;
+ }
+
+ switch (rdma_node_get_transport(id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ 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);
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ ret = cma_connect_iw(id_priv, conn_param);
+ break;
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_connect);
+
+static int cma_accept_ib(struct rdma_id_private *id_priv,
+ struct rdma_conn_param *conn_param)
+{
+ struct ib_cm_rep_param rep;
+ int ret;
+
+ ret = cma_modify_qp_rtr(id_priv, conn_param);
+ if (ret)
+ goto out;
+
+ ret = cma_modify_qp_rts(id_priv, conn_param);
+ if (ret)
+ goto out;
+
+ memset(&rep, 0, sizeof rep);
+ rep.qp_num = id_priv->qp_num;
+ rep.starting_psn = id_priv->seq_num;
+ rep.private_data = conn_param->private_data;
+ rep.private_data_len = conn_param->private_data_len;
+ rep.responder_resources = conn_param->responder_resources;
+ rep.initiator_depth = conn_param->initiator_depth;
+ rep.failover_accepted = 0;
+ rep.flow_control = conn_param->flow_control;
+ rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
+ rep.srq = id_priv->srq ? 1 : 0;
+
+ ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
+out:
+ return ret;
+}
+
+static int cma_accept_iw(struct rdma_id_private *id_priv,
+ struct rdma_conn_param *conn_param)
+{
+ struct iw_cm_conn_param iw_param;
+ int ret;
+
+ ret = cma_modify_qp_rtr(id_priv, conn_param);
+ if (ret)
+ return ret;
+
+ iw_param.ord = conn_param->initiator_depth;
+ iw_param.ird = conn_param->responder_resources;
+ iw_param.private_data = conn_param->private_data;
+ iw_param.private_data_len = conn_param->private_data_len;
+ if (id_priv->id.qp) {
+ iw_param.qpn = id_priv->qp_num;
+ } else
+ iw_param.qpn = conn_param->qp_num;
+
+ return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
+}
+
+static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
+ enum ib_cm_sidr_status status, u32 qkey,
+ const void *private_data, int private_data_len)
+{
+ struct ib_cm_sidr_rep_param rep;
+ int ret;
+
+ memset(&rep, 0, sizeof rep);
+ rep.status = status;
+ if (status == IB_SIDR_SUCCESS) {
+ ret = cma_set_qkey(id_priv, qkey);
+ if (ret)
+ return ret;
+ rep.qp_num = id_priv->qp_num;
+ rep.qkey = id_priv->qkey;
+ }
+ rep.private_data = private_data;
+ rep.private_data_len = private_data_len;
+
+ return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
+}
+
+int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+
+ id_priv->owner = task_pid_nr(current);
+
+ if (!cma_comp(id_priv, RDMA_CM_CONNECT))
+ return -EINVAL;
+
+ if (!id->qp && conn_param) {
+ id_priv->qp_num = conn_param->qp_num;
+ id_priv->srq = conn_param->srq;
+ }
+
+ switch (rdma_node_get_transport(id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ 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);
+ }
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ ret = cma_accept_iw(id_priv, conn_param);
+ break;
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+
+ if (ret)
+ goto reject;
+
+ return 0;
+reject:
+ cma_modify_qp_err(id_priv);
+ rdma_reject(id, NULL, 0);
+ return ret;
+}
+EXPORT_SYMBOL(rdma_accept);
+
+int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (!id_priv->cm_id.ib)
+ return -EINVAL;
+
+ switch (id->device->node_type) {
+ case RDMA_NODE_IB_CA:
+ ret = ib_cm_notify(id_priv->cm_id.ib, event);
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+EXPORT_SYMBOL(rdma_notify);
+
+int rdma_reject(struct rdma_cm_id *id, const void *private_data,
+ u8 private_data_len)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (!id_priv->cm_id.ib)
+ return -EINVAL;
+
+ switch (rdma_node_get_transport(id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ if (id->qp_type == IB_QPT_UD)
+ ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
+ private_data, private_data_len);
+ else
+ ret = ib_send_cm_rej(id_priv->cm_id.ib,
+ IB_CM_REJ_CONSUMER_DEFINED, NULL,
+ 0, private_data, private_data_len);
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ ret = iw_cm_reject(id_priv->cm_id.iw,
+ private_data, private_data_len);
+ break;
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+ 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;
+
+ switch (rdma_node_get_transport(id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ ret = cma_modify_qp_err(id_priv);
+ if (ret)
+ goto out;
+ /* Initiate or respond to a disconnect. */
+ if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
+ ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
+ break;
+ case RDMA_TRANSPORT_IWARP:
+ ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+out:
+ return ret;
+}
+EXPORT_SYMBOL(rdma_disconnect);
+
+static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
+{
+ struct rdma_id_private *id_priv;
+ struct cma_multicast *mc = multicast->context;
+ struct rdma_cm_event event;
+ int ret;
+
+ id_priv = mc->id_priv;
+ if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
+ cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
+ return 0;
+
+ if (!status)
+ status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
+ mutex_lock(&id_priv->qp_mutex);
+ if (!status && id_priv->id.qp)
+ status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
+ be16_to_cpu(multicast->rec.mlid));
+ mutex_unlock(&id_priv->qp_mutex);
+
+ memset(&event, 0, sizeof event);
+ event.status = status;
+ event.param.ud.private_data = mc->context;
+ if (!status) {
+ event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
+ ib_init_ah_from_mcmember(id_priv->id.device,
+ id_priv->id.port_num, &multicast->rec,
+ &event.param.ud.ah_attr);
+ event.param.ud.qp_num = 0xFFFFFF;
+ event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
+ } else
+ event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
+
+ ret = id_priv->id.event_handler(&id_priv->id, &event);
+ if (ret) {
+ cma_exch(id_priv, RDMA_CM_DESTROYING);
+ mutex_unlock(&id_priv->handler_mutex);
+ rdma_destroy_id(&id_priv->id);
+ return 0;
+ }
+
+ 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 = 1;
+
+ comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
+ IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
+ IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
+ IB_SA_MCMEMBER_REC_FLOW_LABEL |
+ IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
+
+ if (id_priv->id.ps == RDMA_PS_IPOIB)
+ comp_mask |= IB_SA_MCMEMBER_REC_RATE |
+ IB_SA_MCMEMBER_REC_RATE_SELECTOR |
+ IB_SA_MCMEMBER_REC_MTU_SELECTOR |
+ IB_SA_MCMEMBER_REC_MTU |
+ IB_SA_MCMEMBER_REC_HOP_LIMIT;
+
+ mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
+ id_priv->id.port_num, &rec,
+ comp_mask, GFP_KERNEL,
+ cma_ib_mc_handler, mc);
+ return PTR_ERR_OR_ZERO(mc->multicast.ib);
+}
+
+static void iboe_mcast_work_handler(struct work_struct *work)
+{
+ struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
+ struct cma_multicast *mc = mw->mc;
+ struct ib_sa_multicast *m = mc->multicast.ib;
+
+ mc->multicast.ib->context = mc;
+ cma_ib_mc_handler(0, m);
+ kref_put(&mc->mcref, release_mc);
+ kfree(mw);
+}
+
+static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
+{
+ 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] = 0xff;
+ mgid->raw[1] = 0x0e;
+ mgid->raw[2] = 0;
+ mgid->raw[3] = 0;
+ mgid->raw[4] = 0;
+ mgid->raw[5] = 0;
+ mgid->raw[6] = 0;
+ mgid->raw[7] = 0;
+ mgid->raw[8] = 0;
+ mgid->raw[9] = 0;
+ mgid->raw[10] = 0xff;
+ mgid->raw[11] = 0xff;
+ *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
+ }
+}
+
+static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
+ struct cma_multicast *mc)
+{
+ struct iboe_mcast_work *work;
+ struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
+ int err;
+ struct sockaddr *addr = (struct sockaddr *)&mc->addr;
+ struct net_device *ndev = NULL;
+
+ if (cma_zero_addr((struct sockaddr *)&mc->addr))
+ return -EINVAL;
+
+ work = kzalloc(sizeof *work, GFP_KERNEL);
+ if (!work)
+ return -ENOMEM;
+
+ mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
+ if (!mc->multicast.ib) {
+ err = -ENOMEM;
+ goto out1;
+ }
+
+ cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
+
+ mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
+ if (id_priv->id.ps == RDMA_PS_UDP)
+ mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
+
+ if (dev_addr->bound_dev_if)
+ ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
+ if (!ndev) {
+ err = -ENODEV;
+ goto out2;
+ }
+ mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
+ mc->multicast.ib->rec.hop_limit = 1;
+ mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
+ dev_put(ndev);
+ if (!mc->multicast.ib->rec.mtu) {
+ err = -EINVAL;
+ goto out2;
+ }
+ rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
+ &mc->multicast.ib->rec.port_gid);
+ work->id = id_priv;
+ work->mc = mc;
+ INIT_WORK(&work->work, iboe_mcast_work_handler);
+ kref_get(&mc->mcref);
+ queue_work(cma_wq, &work->work);
+
+ return 0;
+
+out2:
+ kfree(mc->multicast.ib);
+out1:
+ kfree(work);
+ return err;
+}
+
+int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
+ void *context)
+{
+ struct rdma_id_private *id_priv;
+ struct cma_multicast *mc;
+ int ret;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
+ !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
+ return -EINVAL;
+
+ mc = kmalloc(sizeof *mc, GFP_KERNEL);
+ if (!mc)
+ return -ENOMEM;
+
+ memcpy(&mc->addr, addr, rdma_addr_size(addr));
+ mc->context = context;
+ mc->id_priv = id_priv;
+
+ spin_lock(&id_priv->lock);
+ list_add(&mc->list, &id_priv->mc_list);
+ spin_unlock(&id_priv->lock);
+
+ switch (rdma_node_get_transport(id->device->node_type)) {
+ case RDMA_TRANSPORT_IB:
+ switch (rdma_port_get_link_layer(id->device, id->port_num)) {
+ case IB_LINK_LAYER_INFINIBAND:
+ ret = cma_join_ib_multicast(id_priv, mc);
+ break;
+ case IB_LINK_LAYER_ETHERNET:
+ kref_init(&mc->mcref);
+ ret = cma_iboe_join_multicast(id_priv, mc);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ break;
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+
+ if (ret) {
+ spin_lock_irq(&id_priv->lock);
+ list_del(&mc->list);
+ spin_unlock_irq(&id_priv->lock);
+ kfree(mc);
+ }
+ return ret;
+}
+EXPORT_SYMBOL(rdma_join_multicast);
+
+void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
+{
+ struct rdma_id_private *id_priv;
+ struct cma_multicast *mc;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ spin_lock_irq(&id_priv->lock);
+ list_for_each_entry(mc, &id_priv->mc_list, list) {
+ if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
+ list_del(&mc->list);
+ spin_unlock_irq(&id_priv->lock);
+
+ if (id->qp)
+ ib_detach_mcast(id->qp,
+ &mc->multicast.ib->rec.mgid,
+ be16_to_cpu(mc->multicast.ib->rec.mlid));
+ if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
+ switch (rdma_port_get_link_layer(id->device, id->port_num)) {
+ case IB_LINK_LAYER_INFINIBAND:
+ ib_sa_free_multicast(mc->multicast.ib);
+ kfree(mc);
+ break;
+ case IB_LINK_LAYER_ETHERNET:
+ kref_put(&mc->mcref, release_mc);
+ break;
+ default:
+ break;
+ }
+ }
+ return;
+ }
+ }
+ spin_unlock_irq(&id_priv->lock);
+}
+EXPORT_SYMBOL(rdma_leave_multicast);
+
+static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
+{
+ struct rdma_dev_addr *dev_addr;
+ struct cma_ndev_work *work;
+
+ dev_addr = &id_priv->id.route.addr.dev_addr;
+
+ if ((dev_addr->bound_dev_if == ndev->ifindex) &&
+ memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
+ printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
+ ndev->name, &id_priv->id);
+ work = kzalloc(sizeof *work, GFP_KERNEL);
+ if (!work)
+ return -ENOMEM;
+
+ INIT_WORK(&work->work, cma_ndev_work_handler);
+ work->id = id_priv;
+ work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
+ atomic_inc(&id_priv->refcount);
+ queue_work(cma_wq, &work->work);
+ }
+
+ return 0;
+}
+
+static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
+ void *ptr)
+{
+ struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
+ struct cma_device *cma_dev;
+ struct rdma_id_private *id_priv;
+ int ret = NOTIFY_DONE;
+
+ if (dev_net(ndev) != &init_net)
+ return NOTIFY_DONE;
+
+ if (event != NETDEV_BONDING_FAILOVER)
+ return NOTIFY_DONE;
+
+ if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
+ return NOTIFY_DONE;
+
+ mutex_lock(&lock);
+ list_for_each_entry(cma_dev, &dev_list, list)
+ list_for_each_entry(id_priv, &cma_dev->id_list, list) {
+ ret = cma_netdev_change(ndev, id_priv);
+ if (ret)
+ goto out;
+ }
+
+out:
+ mutex_unlock(&lock);
+ return ret;
+}
+
+static struct notifier_block cma_nb = {
+ .notifier_call = cma_netdev_callback
+};
+
+static void cma_add_one(struct ib_device *device)
+{
+ struct cma_device *cma_dev;
+ struct rdma_id_private *id_priv;
+
+ cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
+ if (!cma_dev)
+ return;
+
+ cma_dev->device = device;
+
+ init_completion(&cma_dev->comp);
+ atomic_set(&cma_dev->refcount, 1);
+ INIT_LIST_HEAD(&cma_dev->id_list);
+ ib_set_client_data(device, &cma_client, cma_dev);
+
+ mutex_lock(&lock);
+ list_add_tail(&cma_dev->list, &dev_list);
+ list_for_each_entry(id_priv, &listen_any_list, list)
+ cma_listen_on_dev(id_priv, cma_dev);
+ mutex_unlock(&lock);
+}
+
+static int cma_remove_id_dev(struct rdma_id_private *id_priv)
+{
+ struct rdma_cm_event event;
+ enum rdma_cm_state state;
+ int ret = 0;
+
+ /* Record that we want to remove the device */
+ state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
+ if (state == RDMA_CM_DESTROYING)
+ return 0;
+
+ cma_cancel_operation(id_priv, state);
+ mutex_lock(&id_priv->handler_mutex);
+
+ /* Check for destruction from another callback. */
+ if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
+ goto out;
+
+ memset(&event, 0, sizeof event);
+ event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
+ ret = id_priv->id.event_handler(&id_priv->id, &event);
+out:
+ mutex_unlock(&id_priv->handler_mutex);
+ return ret;
+}
+
+static void cma_process_remove(struct cma_device *cma_dev)
+{
+ struct rdma_id_private *id_priv;
+ int ret;
+
+ mutex_lock(&lock);
+ while (!list_empty(&cma_dev->id_list)) {
+ id_priv = list_entry(cma_dev->id_list.next,
+ struct rdma_id_private, list);
+
+ list_del(&id_priv->listen_list);
+ list_del_init(&id_priv->list);
+ atomic_inc(&id_priv->refcount);
+ mutex_unlock(&lock);
+
+ ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
+ cma_deref_id(id_priv);
+ if (ret)
+ rdma_destroy_id(&id_priv->id);
+
+ mutex_lock(&lock);
+ }
+ mutex_unlock(&lock);
+
+ cma_deref_dev(cma_dev);
+ wait_for_completion(&cma_dev->comp);
+}
+
+static void cma_remove_one(struct ib_device *device)
+{
+ struct cma_device *cma_dev;
+
+ cma_dev = ib_get_client_data(device, &cma_client);
+ if (!cma_dev)
+ return;
+
+ mutex_lock(&lock);
+ list_del(&cma_dev->list);
+ mutex_unlock(&lock);
+
+ cma_process_remove(cma_dev);
+ kfree(cma_dev);
+}
+
+static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct nlmsghdr *nlh;
+ struct rdma_cm_id_stats *id_stats;
+ struct rdma_id_private *id_priv;
+ struct rdma_cm_id *id = NULL;
+ struct cma_device *cma_dev;
+ int i_dev = 0, i_id = 0;
+
+ /*
+ * We export all of the IDs as a sequence of messages. Each
+ * ID gets its own netlink message.
+ */
+ mutex_lock(&lock);
+
+ list_for_each_entry(cma_dev, &dev_list, list) {
+ if (i_dev < cb->args[0]) {
+ i_dev++;
+ continue;
+ }
+
+ i_id = 0;
+ list_for_each_entry(id_priv, &cma_dev->id_list, list) {
+ if (i_id < cb->args[1]) {
+ i_id++;
+ continue;
+ }
+
+ id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
+ sizeof *id_stats, RDMA_NL_RDMA_CM,
+ RDMA_NL_RDMA_CM_ID_STATS,
+ NLM_F_MULTI);
+ if (!id_stats)
+ goto out;
+
+ memset(id_stats, 0, sizeof *id_stats);
+ id = &id_priv->id;
+ id_stats->node_type = id->route.addr.dev_addr.dev_type;
+ id_stats->port_num = id->port_num;
+ id_stats->bound_dev_if =
+ id->route.addr.dev_addr.bound_dev_if;
+
+ if (ibnl_put_attr(skb, nlh,
+ rdma_addr_size(cma_src_addr(id_priv)),
+ cma_src_addr(id_priv),
+ RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
+ goto out;
+ if (ibnl_put_attr(skb, nlh,
+ rdma_addr_size(cma_src_addr(id_priv)),
+ cma_dst_addr(id_priv),
+ RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
+ goto out;
+
+ id_stats->pid = id_priv->owner;
+ id_stats->port_space = id->ps;
+ id_stats->cm_state = id_priv->state;
+ id_stats->qp_num = id_priv->qp_num;
+ id_stats->qp_type = id->qp_type;
+
+ i_id++;
+ }
+
+ cb->args[1] = 0;
+ i_dev++;
+ }
+
+out:
+ mutex_unlock(&lock);
+ cb->args[0] = i_dev;
+ cb->args[1] = i_id;
+
+ return skb->len;
+}
+
+static const struct ibnl_client_cbs cma_cb_table[] = {
+ [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
+ .module = THIS_MODULE },
+};
+
+static int __init cma_init(void)
+{
+ int ret;
+
+ cma_wq = create_singlethread_workqueue("rdma_cm");
+ if (!cma_wq)
+ return -ENOMEM;
+
+ ib_sa_register_client(&sa_client);
+ rdma_addr_register_client(&addr_client);
+ register_netdevice_notifier(&cma_nb);
+
+ ret = ib_register_client(&cma_client);
+ if (ret)
+ goto err;
+
+ if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
+ printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
+
+ return 0;
+
+err:
+ unregister_netdevice_notifier(&cma_nb);
+ rdma_addr_unregister_client(&addr_client);
+ ib_sa_unregister_client(&sa_client);
+ destroy_workqueue(cma_wq);
+ return ret;
+}
+
+static void __exit cma_cleanup(void)
+{
+ ibnl_remove_client(RDMA_NL_RDMA_CM);
+ ib_unregister_client(&cma_client);
+ unregister_netdevice_notifier(&cma_nb);
+ rdma_addr_unregister_client(&addr_client);
+ ib_sa_unregister_client(&sa_client);
+ destroy_workqueue(cma_wq);
+ idr_destroy(&tcp_ps);
+ idr_destroy(&udp_ps);
+ idr_destroy(&ipoib_ps);
+ idr_destroy(&ib_ps);
+}
+
+module_init(cma_init);
+module_exit(cma_cleanup);
Code Review / kvmfornfv.git / blobdiff