| /* |
| * 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/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_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(sdp_ps); |
| static DEFINE_IDR(tcp_ps); |
| static DEFINE_IDR(udp_ps); |
| static DEFINE_IDR(ipoib_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; |
| }; |
| |
| /* |
| * 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; |
| u8 srq; |
| u8 tos; |
| u8 reuseaddr; |
| }; |
| |
| 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; |
| }; |
| |
| struct sdp_hh { |
| u8 bsdh[16]; |
| u8 sdp_version; /* Major version: 7:4 */ |
| u8 ip_version; /* IP version: 7:4 */ |
| u8 sdp_specific1[10]; |
| __be16 port; |
| __be16 sdp_specific2; |
| union cma_ip_addr src_addr; |
| union cma_ip_addr dst_addr; |
| }; |
| |
| struct sdp_hah { |
| u8 bsdh[16]; |
| u8 sdp_version; |
| }; |
| |
| #define CMA_VERSION 0x00 |
| #define SDP_MAJ_VERSION 0x2 |
| |
| 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 inline u8 sdp_get_majv(u8 sdp_version) |
| { |
| return sdp_version >> 4; |
| } |
| |
| static inline u8 sdp_get_ip_ver(struct sdp_hh *hh) |
| { |
| return hh->ip_version >> 4; |
| } |
| |
| static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver) |
| { |
| hh->ip_version = (ip_ver << 4) | (hh->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 int cma_set_qkey(struct rdma_id_private *id_priv) |
| { |
| struct ib_sa_mcmember_rec rec; |
| int ret = 0; |
| |
| if (id_priv->qkey) |
| return 0; |
| |
| switch (id_priv->id.ps) { |
| case RDMA_PS_UDP: |
| 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 int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num) |
| { |
| int i; |
| int err; |
| struct ib_port_attr props; |
| union ib_gid tmp; |
| |
| err = ib_query_port(device, port_num, &props); |
| if (err) |
| return 1; |
| |
| for (i = 0; i < props.gid_tbl_len; ++i) { |
| err = ib_query_gid(device, port_num, i, &tmp); |
| if (err) |
| return 1; |
| if (!memcmp(&tmp, gid, sizeof tmp)) |
| return 0; |
| } |
| |
| return -EAGAIN; |
| } |
| |
| static int cma_acquire_dev(struct rdma_id_private *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; |
| 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); |
| iboe_addr_get_sgid(dev_addr, &iboe_gid); |
| memcpy(&gid, dev_addr->src_dev_addr + |
| rdma_addr_gid_offset(dev_addr), sizeof gid); |
| list_for_each_entry(cma_dev, &dev_list, list) { |
| for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) { |
| 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 = find_gid_port(cma_dev->device, &iboe_gid, port); |
| else |
| ret = find_gid_port(cma_dev->device, &gid, port); |
| |
| if (!ret) { |
| id_priv->id.port_num = port; |
| goto out; |
| } else if (ret == 1) |
| break; |
| } |
| } |
| } |
| |
| out: |
| if (!ret) |
| cma_attach_to_dev(id_priv, cma_dev); |
| |
| mutex_unlock(&lock); |
| return ret; |
| } |
| |
| 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; |
| |
| 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; |
| |
| 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); |
| 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) |
| { |
| struct in6_addr *ip6; |
| |
| if (addr->sa_family == AF_INET) |
| return ipv4_is_zeronet( |
| ((struct sockaddr_in *)addr)->sin_addr.s_addr); |
| else { |
| ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr; |
| return (ip6->s6_addr32[0] | ip6->s6_addr32[1] | |
| ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0; |
| } |
| } |
| |
| static inline int cma_loopback_addr(struct sockaddr *addr) |
| { |
| if (addr->sa_family == AF_INET) |
| return ipv4_is_loopback( |
| ((struct sockaddr_in *) addr)->sin_addr.s_addr); |
| else |
| return ipv6_addr_loopback( |
| &((struct sockaddr_in6 *) addr)->sin6_addr); |
| } |
| |
| 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; |
| default: |
| return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr, |
| &((struct sockaddr_in6 *) dst)->sin6_addr); |
| } |
| } |
| |
| static inline __be16 cma_port(struct sockaddr *addr) |
| { |
| if (addr->sa_family == AF_INET) |
| return ((struct sockaddr_in *) addr)->sin_port; |
| else |
| return ((struct sockaddr_in6 *) addr)->sin6_port; |
| } |
| |
| static inline int cma_any_port(struct sockaddr *addr) |
| { |
| return !cma_port(addr); |
| } |
| |
| static int cma_get_net_info(void *hdr, enum rdma_port_space ps, |
| u8 *ip_ver, __be16 *port, |
| union cma_ip_addr **src, union cma_ip_addr **dst) |
| { |
| switch (ps) { |
| case RDMA_PS_SDP: |
| if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) != |
| SDP_MAJ_VERSION) |
| return -EINVAL; |
| |
| *ip_ver = sdp_get_ip_ver(hdr); |
| *port = ((struct sdp_hh *) hdr)->port; |
| *src = &((struct sdp_hh *) hdr)->src_addr; |
| *dst = &((struct sdp_hh *) hdr)->dst_addr; |
| break; |
| default: |
| if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION) |
| return -EINVAL; |
| |
| *ip_ver = cma_get_ip_ver(hdr); |
| *port = ((struct cma_hdr *) hdr)->port; |
| *src = &((struct cma_hdr *) hdr)->src_addr; |
| *dst = &((struct cma_hdr *) hdr)->dst_addr; |
| break; |
| } |
| |
| if (*ip_ver != 4 && *ip_ver != 6) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static void cma_save_net_info(struct rdma_addr *addr, |
| struct rdma_addr *listen_addr, |
| u8 ip_ver, __be16 port, |
| union cma_ip_addr *src, union cma_ip_addr *dst) |
| { |
| struct sockaddr_in *listen4, *ip4; |
| struct sockaddr_in6 *listen6, *ip6; |
| |
| switch (ip_ver) { |
| case 4: |
| listen4 = (struct sockaddr_in *) &listen_addr->src_addr; |
| ip4 = (struct sockaddr_in *) &addr->src_addr; |
| ip4->sin_family = listen4->sin_family; |
| ip4->sin_addr.s_addr = dst->ip4.addr; |
| ip4->sin_port = listen4->sin_port; |
| |
| ip4 = (struct sockaddr_in *) &addr->dst_addr; |
| ip4->sin_family = listen4->sin_family; |
| ip4->sin_addr.s_addr = src->ip4.addr; |
| ip4->sin_port = port; |
| break; |
| case 6: |
| listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr; |
| ip6 = (struct sockaddr_in6 *) &addr->src_addr; |
| ip6->sin6_family = listen6->sin6_family; |
| ip6->sin6_addr = dst->ip6; |
| ip6->sin6_port = listen6->sin6_port; |
| |
| ip6 = (struct sockaddr_in6 *) &addr->dst_addr; |
| ip6->sin6_family = listen6->sin6_family; |
| ip6->sin6_addr = src->ip6; |
| ip6->sin6_port = port; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static inline int cma_user_data_offset(enum rdma_port_space ps) |
| { |
| switch (ps) { |
| case RDMA_PS_SDP: |
| return 0; |
| default: |
| return 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((struct sockaddr *) &id_priv->id.route.addr.src_addr) |
| && !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 int cma_verify_rep(struct rdma_id_private *id_priv, void *data) |
| { |
| if (id_priv->id.ps == RDMA_PS_SDP && |
| sdp_get_majv(((struct sdp_hah *) data)->sdp_version) != |
| SDP_MAJ_VERSION) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| 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: |
| event.status = cma_verify_rep(id_priv, ib_event->private_data); |
| if (event.status) |
| event.event = RDMA_CM_EVENT_CONNECT_ERROR; |
| else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) { |
| 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; |
| union cma_ip_addr *src, *dst; |
| __be16 port; |
| u8 ip_ver; |
| int ret; |
| |
| if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
| &ip_ver, &port, &src, &dst)) |
| return NULL; |
| |
| 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; |
| |
| cma_save_net_info(&id->route.addr, &listen_id->route.addr, |
| ip_ver, port, src, dst); |
| |
| 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((struct sockaddr *) &rt->addr.src_addr)) { |
| 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, rt->path_rec[0].pkey); |
| } else { |
| ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr, |
| &rt->addr.dev_addr); |
| if (ret) |
| goto err; |
| } |
| rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); |
| |
| id_priv = container_of(id, struct rdma_id_private, id); |
| 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; |
| union cma_ip_addr *src, *dst; |
| __be16 port; |
| u8 ip_ver; |
| 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; |
| |
| |
| if (cma_get_net_info(ib_event->private_data, listen_id->ps, |
| &ip_ver, &port, &src, &dst)) |
| goto err; |
| |
| cma_save_net_info(&id->route.addr, &listen_id->route.addr, |
| ip_ver, port, src, dst); |
| |
| if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { |
| ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr, |
| &id->route.addr.dev_addr); |
| if (ret) |
| goto err; |
| } |
| |
| id_priv = container_of(id, struct rdma_id_private, id); |
| 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_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_disable_callback(listen_id, RDMA_CM_LISTEN)) |
| return -ECONNABORTED; |
| |
| memset(&event, 0, sizeof event); |
| offset = cma_user_data_offset(listen_id->id.ps); |
| event.event = RDMA_CM_EVENT_CONNECT_REQUEST; |
| if (listen_id->id.qp_type == IB_QPT_UD) { |
| 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 out; |
| } |
| |
| mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING); |
| ret = cma_acquire_dev(conn_id); |
| if (ret) |
| goto release_conn_id; |
| |
| 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) { |
| /* |
| * 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); |
| cma_deref_id(conn_id); |
| goto out; |
| } |
| cma_deref_id(conn_id); |
| |
| /* Destroy the CM ID by returning a non-zero value. */ |
| conn_id->cm_id.ib = NULL; |
| |
| release_conn_id: |
| cma_exch(conn_id, RDMA_CM_DESTROYING); |
| mutex_unlock(&conn_id->handler_mutex); |
| rdma_destroy_id(&conn_id->id); |
| |
| out: |
| mutex_unlock(&listen_id->handler_mutex); |
| return ret; |
| } |
| |
| static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr) |
| { |
| return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr))); |
| } |
| |
| 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; |
| struct sdp_hh *sdp_data, *sdp_mask; |
| __be32 ip4_addr; |
| struct in6_addr ip6_addr; |
| |
| memset(compare, 0, sizeof *compare); |
| cma_data = (void *) compare->data; |
| cma_mask = (void *) compare->mask; |
| sdp_data = (void *) compare->data; |
| sdp_mask = (void *) compare->mask; |
| |
| switch (addr->sa_family) { |
| case AF_INET: |
| ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; |
| if (ps == RDMA_PS_SDP) { |
| sdp_set_ip_ver(sdp_data, 4); |
| sdp_set_ip_ver(sdp_mask, 0xF); |
| sdp_data->dst_addr.ip4.addr = ip4_addr; |
| sdp_mask->dst_addr.ip4.addr = htonl(~0); |
| } else { |
| cma_set_ip_ver(cma_data, 4); |
| cma_set_ip_ver(cma_mask, 0xF); |
| 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; |
| if (ps == RDMA_PS_SDP) { |
| sdp_set_ip_ver(sdp_data, 6); |
| sdp_set_ip_ver(sdp_mask, 0xF); |
| sdp_data->dst_addr.ip6 = ip6_addr; |
| memset(&sdp_mask->dst_addr.ip6, 0xFF, |
| sizeof sdp_mask->dst_addr.ip6); |
| } else { |
| cma_set_ip_ver(cma_data, 6); |
| cma_set_ip_ver(cma_mask, 0xF); |
| 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; |
| struct sockaddr_in *sin; |
| int ret = 0; |
| |
| 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: |
| sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; |
| *sin = iw_event->local_addr; |
| sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr; |
| *sin = iw_event->remote_addr; |
| switch (iw_event->status) { |
| case 0: |
| event.event = RDMA_CM_EVENT_ESTABLISHED; |
| 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; |
| 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 sockaddr_in *sin; |
| struct net_device *dev = NULL; |
| struct rdma_cm_event event; |
| int ret; |
| struct ib_device_attr attr; |
| |
| 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; |
| |
| dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr); |
| if (!dev) { |
| ret = -EADDRNOTAVAIL; |
| mutex_unlock(&conn_id->handler_mutex); |
| rdma_destroy_id(new_cm_id); |
| goto out; |
| } |
| ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL); |
| if (ret) { |
| mutex_unlock(&conn_id->handler_mutex); |
| rdma_destroy_id(new_cm_id); |
| goto out; |
| } |
| |
| ret = cma_acquire_dev(conn_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; |
| |
| sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr; |
| *sin = iw_event->local_addr; |
| sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr; |
| *sin = iw_event->remote_addr; |
| |
| 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 = attr.max_qp_init_rd_atom; |
| event.param.conn.responder_resources = attr.max_qp_rd_atom; |
| |
| /* |
| * 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: |
| if (dev) |
| dev_put(dev); |
| 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 = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
| svc_id = cma_get_service_id(id_priv->id.ps, addr); |
| if (cma_any_addr(addr)) |
| 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 sockaddr_in *sin; |
| 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; |
| |
| sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; |
| id_priv->cm_id.iw->local_addr = *sin; |
| |
| 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; |
| |
| 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(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr, |
| ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr)); |
| |
| 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; |
| |
| 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_addr *addr = &id_priv->id.route.addr; |
| struct ib_sa_path_rec path_rec; |
| ib_sa_comp_mask comp_mask; |
| struct sockaddr_in6 *sin6; |
| |
| memset(&path_rec, 0, sizeof path_rec); |
| rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid); |
| rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid); |
| path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr)); |
| path_rec.numb_path = 1; |
| path_rec.reversible = 1; |
| path_rec.service_id = cma_get_service_id(id_priv->id.ps, |
| (struct sockaddr *) &addr->dst_addr); |
| |
| 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; |
| |
| if (addr->src_addr.ss_family == AF_INET) { |
| path_rec.qos_class = cpu_to_be16((u16) id_priv->tos); |
| comp_mask |= IB_SA_PATH_REC_QOS_CLASS; |
| } else { |
| sin6 = (struct sockaddr_in6 *) &addr->src_addr; |
| path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20); |
| comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS; |
| } |
| |
| 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 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 sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr; |
| struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr; |
| struct net_device *ndev = NULL; |
| u16 vid; |
| |
| if (src_addr->sin_family != dst_addr->sin_family) |
| return -EINVAL; |
| |
| 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; |
| } |
| |
| vid = rdma_vlan_dev_vlan_id(ndev); |
| |
| iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid); |
| iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid); |
| |
| 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 = id_priv->tos >> 5; |
| |
| 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 int cma_bind_loopback(struct rdma_id_private *id_priv) |
| { |
| struct cma_device *cma_dev; |
| struct ib_port_attr port_attr; |
| union ib_gid gid; |
| u16 pkey; |
| int ret; |
| u8 p; |
| |
| mutex_lock(&lock); |
| if (list_empty(&dev_list)) { |
| ret = -ENODEV; |
| goto out; |
| } |
| list_for_each_entry(cma_dev, &dev_list, list) |
| for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p) |
| if (!ib_query_port(cma_dev->device, p, &port_attr) && |
| port_attr.state == IB_PORT_ACTIVE) |
| goto port_found; |
| |
| p = 1; |
| cma_dev = list_entry(dev_list.next, struct cma_device, list); |
| |
| 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); |
| 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; |
| |
| if (!status && !id_priv->cma_dev) |
| status = cma_acquire_dev(id_priv); |
| |
| 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 { |
| memcpy(&id_priv->id.route.addr.src_addr, src_addr, |
| ip_addr_size(src_addr)); |
| 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; |
| struct sockaddr *src, *dst; |
| 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); |
| |
| src = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
| if (cma_zero_addr(src)) { |
| dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr; |
| if ((src->sa_family = dst->sa_family) == AF_INET) { |
| ((struct sockaddr_in *) src)->sin_addr.s_addr = |
| ((struct sockaddr_in *) dst)->sin_addr.s_addr; |
| } else { |
| ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr, |
| &((struct sockaddr_in6 *) dst)->sin6_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; |
| if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) { |
| ((struct sockaddr_in6 *) src_addr)->sin6_scope_id = |
| ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id; |
| } |
| } |
| 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_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) |
| return -EINVAL; |
| |
| atomic_inc(&id_priv->refcount); |
| memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr)); |
| if (cma_any_addr(dst_addr)) |
| ret = cma_resolve_loopback(id_priv); |
| else |
| ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr, |
| 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 (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); |
| |
| static void cma_bind_port(struct rdma_bind_list *bind_list, |
| struct rdma_id_private *id_priv) |
| { |
| struct sockaddr_in *sin; |
| |
| sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr; |
| sin->sin_port = htons(bind_list->port); |
| 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 port, ret; |
| |
| bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL); |
| if (!bind_list) |
| return -ENOMEM; |
| |
| do { |
| ret = idr_get_new_above(ps, bind_list, snum, &port); |
| } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL)); |
| |
| if (ret) |
| goto err1; |
| |
| if (port != snum) { |
| ret = -EADDRNOTAVAIL; |
| goto err2; |
| } |
| |
| bind_list->ps = ps; |
| bind_list->port = (unsigned short) port; |
| cma_bind_port(bind_list, id_priv); |
| return 0; |
| err2: |
| idr_remove(ps, port); |
| err1: |
| kfree(bind_list); |
| return 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(&low, &high); |
| remaining = (high - low) + 1; |
| rover = net_random() % 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; |
| struct hlist_node *node; |
| |
| addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; |
| if (cma_any_addr(addr) && !reuseaddr) |
| return -EADDRNOTAVAIL; |
| |
| hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { |
| if (id_priv == cur_id) |
| continue; |
| |
| if ((cur_id->state == RDMA_CM_LISTEN) || |
| !reuseaddr || !cur_id->reuseaddr) { |
| cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; |
| if (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((struct sockaddr *) &id_priv->id.route.addr.src_addr)); |
| 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 int cma_get_port(struct rdma_id_private *id_priv) |
| { |
| struct idr *ps; |
| int ret; |
| |
| switch (id_priv->id.ps) { |
| case RDMA_PS_SDP: |
| ps = &sdp_ps; |
| break; |
| case RDMA_PS_TCP: |
| ps = &tcp_ps; |
| break; |
| case RDMA_PS_UDP: |
| ps = &udp_ps; |
| break; |
| case RDMA_PS_IPOIB: |
| ps = &ipoib_ps; |
| break; |
| default: |
| return -EPROTONOSUPPORT; |
| } |
| |
| mutex_lock(&lock); |
| if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr)) |
| 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 defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 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) && |
| !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) { |
| ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET; |
| ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr); |
| 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) |
| 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; |
| |
| if (!cma_any_addr(addr)) { |
| ret = rdma_translate_ip(addr, &id->route.addr.dev_addr); |
| if (ret) |
| goto err1; |
| |
| ret = cma_acquire_dev(id_priv); |
| if (ret) |
| goto err1; |
| } |
| |
| memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); |
| 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, enum rdma_port_space ps, |
| struct rdma_route *route) |
| { |
| struct cma_hdr *cma_hdr; |
| struct sdp_hh *sdp_hdr; |
| |
| if (route->addr.src_addr.ss_family == AF_INET) { |
| struct sockaddr_in *src4, *dst4; |
| |
| src4 = (struct sockaddr_in *) &route->addr.src_addr; |
| dst4 = (struct sockaddr_in *) &route->addr.dst_addr; |
| |
| switch (ps) { |
| case RDMA_PS_SDP: |
| sdp_hdr = hdr; |
| if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) |
| return -EINVAL; |
| sdp_set_ip_ver(sdp_hdr, 4); |
| sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; |
| sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; |
| sdp_hdr->port = src4->sin_port; |
| break; |
| default: |
| cma_hdr = hdr; |
| cma_hdr->cma_version = CMA_VERSION; |
| 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; |
| break; |
| } |
| } else { |
| struct sockaddr_in6 *src6, *dst6; |
| |
| src6 = (struct sockaddr_in6 *) &route->addr.src_addr; |
| dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr; |
| |
| switch (ps) { |
| case RDMA_PS_SDP: |
| sdp_hdr = hdr; |
| if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION) |
| return -EINVAL; |
| sdp_set_ip_ver(sdp_hdr, 6); |
| sdp_hdr->src_addr.ip6 = src6->sin6_addr; |
| sdp_hdr->dst_addr.ip6 = dst6->sin6_addr; |
| sdp_hdr->port = src6->sin6_port; |
| break; |
| default: |
| cma_hdr = hdr; |
| cma_hdr->cma_version = CMA_VERSION; |
| 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; |
| break; |
| } |
| } |
| 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); |
| if (ret) { |
| event.event = RDMA_CM_EVENT_ADDR_ERROR; |
| event.status = -EINVAL; |
| break; |
| } |
| if (id_priv->qkey != rep->qkey) { |
| event.event = RDMA_CM_EVENT_UNREACHABLE; |
| event.status = -EINVAL; |
| 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 rdma_route *route; |
| struct ib_cm_id *id; |
| int ret; |
| |
| req.private_data_len = sizeof(struct cma_hdr) + |
| conn_param->private_data_len; |
| req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC); |
| if (!req.private_data) |
| return -ENOMEM; |
| |
| if (conn_param->private_data && conn_param->private_data_len) |
| memcpy((void *) req.private_data + sizeof(struct cma_hdr), |
| conn_param->private_data, conn_param->private_data_len); |
| |
| route = &id_priv->id.route; |
| ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route); |
| if (ret) |
| goto out; |
| |
| 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 = route->path_rec; |
| req.service_id = cma_get_service_id(id_priv->id.ps, |
| (struct sockaddr *) &route->addr.dst_addr); |
| 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(req.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->id.ps); |
| req.private_data_len = offset + conn_param->private_data_len; |
| private_data = kzalloc(req.private_data_len, GFP_ATOMIC); |
| if (!private_data) |
| return -ENOMEM; |
| |
| 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; |
| ret = cma_format_hdr(private_data, id_priv->id.ps, route); |
| 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 = cma_get_service_id(id_priv->id.ps, |
| (struct sockaddr *) &route->addr.dst_addr); |
| req.qp_num = id_priv->qp_num; |
| req.qp_type = IB_QPT_RC; |
| 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 = conn_param->retry_count; |
| req.rnr_retry_count = 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; |
| struct sockaddr_in* sin; |
| 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; |
| |
| sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr; |
| cm_id->local_addr = *sin; |
| |
| sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr; |
| cm_id->remote_addr = *sin; |
| |
| ret = cma_modify_qp_rtr(id_priv, conn_param); |
| if (ret) |
| goto out; |
| |
| 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; |
| 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 = 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, |
| 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); |
| 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) |
| ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS, |
| conn_param->private_data, |
| conn_param->private_data_len); |
| 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, |
| 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; |
| |
| mutex_lock(&id_priv->qp_mutex); |
| if (!status && id_priv->id.qp) |
| status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, |
| 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_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; |
| |
| cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid); |
| if (id_priv->id.ps == RDMA_PS_UDP) |
| rec.qkey = cpu_to_be32(RDMA_UDP_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; |
| |
| 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); |
| if (IS_ERR(mc->multicast.ib)) |
| return PTR_ERR(mc->multicast.ib); |
| |
| return 0; |
| } |
| |
| 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; |
| } |
| iboe_addr_get_sgid(dev_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, ip_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, ip_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, |
| 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 *ctx) |
| { |
| struct net_device *ndev = (struct net_device *)ctx; |
| 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); |
| 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 (id->route.addr.src_addr.ss_family == AF_INET) { |
| if (ibnl_put_attr(skb, nlh, |
| sizeof(struct sockaddr_in), |
| &id->route.addr.src_addr, |
| RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { |
| goto out; |
| } |
| if (ibnl_put_attr(skb, nlh, |
| sizeof(struct sockaddr_in), |
| &id->route.addr.dst_addr, |
| RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) { |
| goto out; |
| } |
| } else if (id->route.addr.src_addr.ss_family == AF_INET6) { |
| if (ibnl_put_attr(skb, nlh, |
| sizeof(struct sockaddr_in6), |
| &id->route.addr.src_addr, |
| RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) { |
| goto out; |
| } |
| if (ibnl_put_attr(skb, nlh, |
| sizeof(struct sockaddr_in6), |
| &id->route.addr.dst_addr, |
| 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 }, |
| }; |
| |
| 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(&sdp_ps); |
| idr_destroy(&tcp_ps); |
| idr_destroy(&udp_ps); |
| idr_destroy(&ipoib_ps); |
| } |
| |
| module_init(cma_init); |
| module_exit(cma_cleanup); |