mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 19:26:40 +07:00
c8f6a362bf
Extend rdma_cm to support multicast communication. Multicast support is added to the existing RDMA_PS_UDP port space, as well as a new RDMA_PS_IPOIB port space. The latter port space allows joining the multicast groups used by IPoIB, which enables offloading IPoIB traffic to a separate QP. The port space determines the signature used in the MGID when joining the group. The newly added RDMA_PS_IPOIB also allows for unicast operations, similar to RDMA_PS_UDP. Supporting the RDMA_PS_IPOIB requires changing how UD QPs are initialized, since we can no longer assume that the qkey is constant. This requires saving the Q_Key to use when attaching to a device, so that it is available when creating the QP. The Q_Key information is exported to the user through the existing rdma_init_qp_attr() interface. Multicast support is also exported to userspace through the rdma_ucm. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2800 lines
68 KiB
C
2800 lines
68 KiB
C
/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
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* Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
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* Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
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*
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* This Software is licensed under one of the following licenses:
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*
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* 1) under the terms of the "Common Public License 1.0" a copy of which is
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* available from the Open Source Initiative, see
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* http://www.opensource.org/licenses/cpl.php.
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*
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* 2) under the terms of the "The BSD License" a copy of which is
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* available from the Open Source Initiative, see
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* http://www.opensource.org/licenses/bsd-license.php.
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*
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* 3) under the terms of the "GNU General Public License (GPL) Version 2" a
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* copy of which is available from the Open Source Initiative, see
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* http://www.opensource.org/licenses/gpl-license.php.
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*
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* Licensee has the right to choose one of the above licenses.
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*
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* Redistributions of source code must retain the above copyright
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* notice and one of the license notices.
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*
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* Redistributions in binary form must reproduce both the above copyright
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* notice, one of the license notices in the documentation
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* and/or other materials provided with the distribution.
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*
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*/
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#include <linux/completion.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/mutex.h>
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#include <linux/random.h>
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#include <linux/idr.h>
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#include <linux/inetdevice.h>
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#include <net/tcp.h>
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#include <rdma/rdma_cm.h>
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#include <rdma/rdma_cm_ib.h>
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#include <rdma/ib_cache.h>
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#include <rdma/ib_cm.h>
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#include <rdma/ib_sa.h>
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#include <rdma/iw_cm.h>
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MODULE_AUTHOR("Sean Hefty");
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MODULE_DESCRIPTION("Generic RDMA CM Agent");
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MODULE_LICENSE("Dual BSD/GPL");
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#define CMA_CM_RESPONSE_TIMEOUT 20
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#define CMA_MAX_CM_RETRIES 15
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static void cma_add_one(struct ib_device *device);
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static void cma_remove_one(struct ib_device *device);
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static struct ib_client cma_client = {
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.name = "cma",
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.add = cma_add_one,
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.remove = cma_remove_one
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};
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static struct ib_sa_client sa_client;
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static struct rdma_addr_client addr_client;
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static LIST_HEAD(dev_list);
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static LIST_HEAD(listen_any_list);
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static DEFINE_MUTEX(lock);
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static struct workqueue_struct *cma_wq;
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static DEFINE_IDR(sdp_ps);
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static DEFINE_IDR(tcp_ps);
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static DEFINE_IDR(udp_ps);
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static DEFINE_IDR(ipoib_ps);
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static int next_port;
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struct cma_device {
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struct list_head list;
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struct ib_device *device;
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__be64 node_guid;
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struct completion comp;
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atomic_t refcount;
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struct list_head id_list;
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};
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enum cma_state {
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CMA_IDLE,
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CMA_ADDR_QUERY,
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CMA_ADDR_RESOLVED,
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CMA_ROUTE_QUERY,
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CMA_ROUTE_RESOLVED,
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CMA_CONNECT,
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CMA_DISCONNECT,
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CMA_ADDR_BOUND,
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CMA_LISTEN,
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CMA_DEVICE_REMOVAL,
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CMA_DESTROYING
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};
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struct rdma_bind_list {
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struct idr *ps;
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struct hlist_head owners;
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unsigned short port;
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};
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/*
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* Device removal can occur at anytime, so we need extra handling to
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* serialize notifying the user of device removal with other callbacks.
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* We do this by disabling removal notification while a callback is in process,
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* and reporting it after the callback completes.
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*/
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struct rdma_id_private {
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struct rdma_cm_id id;
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struct rdma_bind_list *bind_list;
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struct hlist_node node;
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struct list_head list;
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struct list_head listen_list;
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struct cma_device *cma_dev;
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struct list_head mc_list;
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enum cma_state state;
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spinlock_t lock;
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struct completion comp;
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atomic_t refcount;
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wait_queue_head_t wait_remove;
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atomic_t dev_remove;
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int backlog;
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int timeout_ms;
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struct ib_sa_query *query;
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int query_id;
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union {
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struct ib_cm_id *ib;
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struct iw_cm_id *iw;
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} cm_id;
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u32 seq_num;
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u32 qkey;
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u32 qp_num;
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u8 srq;
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};
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struct cma_multicast {
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struct rdma_id_private *id_priv;
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union {
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struct ib_sa_multicast *ib;
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} multicast;
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struct list_head list;
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void *context;
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struct sockaddr addr;
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u8 pad[sizeof(struct sockaddr_in6) -
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sizeof(struct sockaddr)];
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};
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struct cma_work {
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struct work_struct work;
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struct rdma_id_private *id;
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enum cma_state old_state;
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enum cma_state new_state;
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struct rdma_cm_event event;
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};
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union cma_ip_addr {
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struct in6_addr ip6;
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struct {
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__u32 pad[3];
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__u32 addr;
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} ip4;
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};
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struct cma_hdr {
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u8 cma_version;
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u8 ip_version; /* IP version: 7:4 */
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__u16 port;
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union cma_ip_addr src_addr;
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union cma_ip_addr dst_addr;
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};
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struct sdp_hh {
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u8 bsdh[16];
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u8 sdp_version; /* Major version: 7:4 */
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u8 ip_version; /* IP version: 7:4 */
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u8 sdp_specific1[10];
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__u16 port;
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__u16 sdp_specific2;
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union cma_ip_addr src_addr;
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union cma_ip_addr dst_addr;
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};
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struct sdp_hah {
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u8 bsdh[16];
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u8 sdp_version;
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};
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#define CMA_VERSION 0x00
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#define SDP_MAJ_VERSION 0x2
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static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
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{
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&id_priv->lock, flags);
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ret = (id_priv->state == comp);
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return ret;
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}
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static int cma_comp_exch(struct rdma_id_private *id_priv,
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enum cma_state comp, enum cma_state exch)
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{
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&id_priv->lock, flags);
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if ((ret = (id_priv->state == comp)))
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id_priv->state = exch;
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return ret;
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}
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static enum cma_state cma_exch(struct rdma_id_private *id_priv,
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enum cma_state exch)
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{
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unsigned long flags;
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enum cma_state old;
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spin_lock_irqsave(&id_priv->lock, flags);
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old = id_priv->state;
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id_priv->state = exch;
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return old;
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}
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static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
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{
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return hdr->ip_version >> 4;
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}
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static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
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{
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hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
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}
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static inline u8 sdp_get_majv(u8 sdp_version)
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{
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return sdp_version >> 4;
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}
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static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
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{
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return hh->ip_version >> 4;
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}
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static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
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{
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hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
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}
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static inline int cma_is_ud_ps(enum rdma_port_space ps)
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{
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return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
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}
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static void cma_attach_to_dev(struct rdma_id_private *id_priv,
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struct cma_device *cma_dev)
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{
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atomic_inc(&cma_dev->refcount);
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id_priv->cma_dev = cma_dev;
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id_priv->id.device = cma_dev->device;
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list_add_tail(&id_priv->list, &cma_dev->id_list);
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}
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static inline void cma_deref_dev(struct cma_device *cma_dev)
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{
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if (atomic_dec_and_test(&cma_dev->refcount))
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complete(&cma_dev->comp);
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}
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static void cma_detach_from_dev(struct rdma_id_private *id_priv)
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{
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list_del(&id_priv->list);
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cma_deref_dev(id_priv->cma_dev);
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id_priv->cma_dev = NULL;
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}
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static int cma_set_qkey(struct ib_device *device, u8 port_num,
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enum rdma_port_space ps,
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struct rdma_dev_addr *dev_addr, u32 *qkey)
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{
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struct ib_sa_mcmember_rec rec;
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int ret = 0;
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switch (ps) {
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case RDMA_PS_UDP:
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*qkey = RDMA_UDP_QKEY;
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break;
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case RDMA_PS_IPOIB:
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ib_addr_get_mgid(dev_addr, &rec.mgid);
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ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
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*qkey = be32_to_cpu(rec.qkey);
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break;
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default:
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break;
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}
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return ret;
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}
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static int cma_acquire_dev(struct rdma_id_private *id_priv)
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{
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struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
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struct cma_device *cma_dev;
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union ib_gid gid;
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int ret = -ENODEV;
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switch (rdma_node_get_transport(dev_addr->dev_type)) {
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case RDMA_TRANSPORT_IB:
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ib_addr_get_sgid(dev_addr, &gid);
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break;
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case RDMA_TRANSPORT_IWARP:
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iw_addr_get_sgid(dev_addr, &gid);
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break;
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default:
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return -ENODEV;
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}
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list_for_each_entry(cma_dev, &dev_list, list) {
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ret = ib_find_cached_gid(cma_dev->device, &gid,
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&id_priv->id.port_num, NULL);
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if (!ret) {
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ret = cma_set_qkey(cma_dev->device,
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id_priv->id.port_num,
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id_priv->id.ps, dev_addr,
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&id_priv->qkey);
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if (!ret)
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cma_attach_to_dev(id_priv, cma_dev);
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break;
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}
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}
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return ret;
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}
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static void cma_deref_id(struct rdma_id_private *id_priv)
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{
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if (atomic_dec_and_test(&id_priv->refcount))
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complete(&id_priv->comp);
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}
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static void cma_release_remove(struct rdma_id_private *id_priv)
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{
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if (atomic_dec_and_test(&id_priv->dev_remove))
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wake_up(&id_priv->wait_remove);
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}
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struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
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void *context, enum rdma_port_space ps)
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{
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struct rdma_id_private *id_priv;
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id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
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if (!id_priv)
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return ERR_PTR(-ENOMEM);
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id_priv->state = CMA_IDLE;
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id_priv->id.context = context;
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id_priv->id.event_handler = event_handler;
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id_priv->id.ps = ps;
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spin_lock_init(&id_priv->lock);
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init_completion(&id_priv->comp);
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atomic_set(&id_priv->refcount, 1);
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init_waitqueue_head(&id_priv->wait_remove);
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atomic_set(&id_priv->dev_remove, 0);
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INIT_LIST_HEAD(&id_priv->listen_list);
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INIT_LIST_HEAD(&id_priv->mc_list);
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get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
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return &id_priv->id;
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}
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EXPORT_SYMBOL(rdma_create_id);
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static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
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{
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struct ib_qp_attr qp_attr;
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int qp_attr_mask, ret;
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qp_attr.qp_state = IB_QPS_INIT;
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ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
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if (ret)
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return ret;
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ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
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if (ret)
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return ret;
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qp_attr.qp_state = IB_QPS_RTR;
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ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
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if (ret)
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return ret;
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qp_attr.qp_state = IB_QPS_RTS;
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qp_attr.sq_psn = 0;
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ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
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return ret;
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}
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static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
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{
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struct ib_qp_attr qp_attr;
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int qp_attr_mask, ret;
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qp_attr.qp_state = IB_QPS_INIT;
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ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
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if (ret)
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return ret;
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return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
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}
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int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
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struct ib_qp_init_attr *qp_init_attr)
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{
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struct rdma_id_private *id_priv;
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struct ib_qp *qp;
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int ret;
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id_priv = container_of(id, struct rdma_id_private, id);
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if (id->device != pd->device)
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return -EINVAL;
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qp = ib_create_qp(pd, qp_init_attr);
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if (IS_ERR(qp))
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return PTR_ERR(qp);
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if (cma_is_ud_ps(id_priv->id.ps))
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ret = cma_init_ud_qp(id_priv, qp);
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else
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ret = cma_init_conn_qp(id_priv, qp);
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if (ret)
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goto err;
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id->qp = qp;
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id_priv->qp_num = qp->qp_num;
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id_priv->srq = (qp->srq != NULL);
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return 0;
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err:
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ib_destroy_qp(qp);
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return ret;
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}
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EXPORT_SYMBOL(rdma_create_qp);
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void rdma_destroy_qp(struct rdma_cm_id *id)
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{
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ib_destroy_qp(id->qp);
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}
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EXPORT_SYMBOL(rdma_destroy_qp);
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static int cma_modify_qp_rtr(struct rdma_cm_id *id)
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{
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struct ib_qp_attr qp_attr;
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int qp_attr_mask, ret;
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if (!id->qp)
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return 0;
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/* Need to update QP attributes from default values. */
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qp_attr.qp_state = IB_QPS_INIT;
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ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
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if (ret)
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return ret;
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ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
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if (ret)
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return ret;
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qp_attr.qp_state = IB_QPS_RTR;
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ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
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if (ret)
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return ret;
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return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
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}
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static int cma_modify_qp_rts(struct rdma_cm_id *id)
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{
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struct ib_qp_attr qp_attr;
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int qp_attr_mask, ret;
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if (!id->qp)
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return 0;
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qp_attr.qp_state = IB_QPS_RTS;
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ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
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if (ret)
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return ret;
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|
|
return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
|
|
}
|
|
|
|
static int cma_modify_qp_err(struct rdma_cm_id *id)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
|
|
if (!id->qp)
|
|
return 0;
|
|
|
|
qp_attr.qp_state = IB_QPS_ERR;
|
|
return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
|
|
}
|
|
|
|
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;
|
|
|
|
ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
|
|
ib_addr_get_pkey(dev_addr),
|
|
&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 (cma_is_ud_ps(id_priv->id.ps)) {
|
|
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 || cma_is_ud_ps(id_priv->id.ps))
|
|
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 = IB_ACCESS_LOCAL_WRITE;
|
|
*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 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)
|
|
{
|
|
return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
|
|
}
|
|
|
|
static inline int cma_any_addr(struct sockaddr *addr)
|
|
{
|
|
return cma_zero_addr(addr) || cma_loopback_addr(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, __u16 *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, __u16 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_node_get_transport(id_priv->id.device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (id_priv->query)
|
|
ib_sa_cancel_query(id_priv->query_id, id_priv->query);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static inline int cma_internal_listen(struct rdma_id_private *id_priv)
|
|
{
|
|
return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
|
|
cma_any_addr(&id_priv->id.route.addr.src_addr);
|
|
}
|
|
|
|
static void cma_destroy_listen(struct rdma_id_private *id_priv)
|
|
{
|
|
cma_exch(id_priv, CMA_DESTROYING);
|
|
|
|
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 && !IS_ERR(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 && !IS_ERR(id_priv->cm_id.iw))
|
|
iw_destroy_cm_id(id_priv->cm_id.iw);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
cma_detach_from_dev(id_priv);
|
|
}
|
|
list_del(&id_priv->listen_list);
|
|
|
|
cma_deref_id(id_priv);
|
|
wait_for_completion(&id_priv->comp);
|
|
|
|
kfree(id_priv);
|
|
}
|
|
|
|
static void cma_cancel_listens(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_id_private *dev_id_priv;
|
|
|
|
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);
|
|
cma_destroy_listen(dev_id_priv);
|
|
}
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
static void cma_cancel_operation(struct rdma_id_private *id_priv,
|
|
enum cma_state state)
|
|
{
|
|
switch (state) {
|
|
case CMA_ADDR_QUERY:
|
|
rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
|
|
break;
|
|
case CMA_ROUTE_QUERY:
|
|
cma_cancel_route(id_priv);
|
|
break;
|
|
case CMA_LISTEN:
|
|
if (cma_any_addr(&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);
|
|
ib_sa_free_multicast(mc->multicast.ib);
|
|
kfree(mc);
|
|
}
|
|
}
|
|
|
|
void rdma_destroy_id(struct rdma_cm_id *id)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
enum cma_state state;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
state = cma_exch(id_priv, CMA_DESTROYING);
|
|
cma_cancel_operation(id_priv, state);
|
|
|
|
mutex_lock(&lock);
|
|
if (id_priv->cma_dev) {
|
|
mutex_unlock(&lock);
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (id_priv->cm_id.ib && !IS_ERR(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 && !IS_ERR(id_priv->cm_id.iw))
|
|
iw_destroy_cm_id(id_priv->cm_id.iw);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
cma_leave_mc_groups(id_priv);
|
|
mutex_lock(&lock);
|
|
cma_detach_from_dev(id_priv);
|
|
}
|
|
mutex_unlock(&lock);
|
|
|
|
cma_release_port(id_priv);
|
|
cma_deref_id(id_priv);
|
|
wait_for_completion(&id_priv->comp);
|
|
|
|
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->id);
|
|
if (ret)
|
|
goto reject;
|
|
|
|
ret = cma_modify_qp_rts(&id_priv->id);
|
|
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->id);
|
|
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;
|
|
|
|
atomic_inc(&id_priv->dev_remove);
|
|
if (!cma_comp(id_priv, CMA_CONNECT))
|
|
goto out;
|
|
|
|
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, CMA_CONNECT, CMA_DISCONNECT))
|
|
goto out;
|
|
event.event = RDMA_CM_EVENT_DISCONNECTED;
|
|
break;
|
|
case IB_CM_TIMEWAIT_EXIT:
|
|
case IB_CM_MRA_RECEIVED:
|
|
/* ignore event */
|
|
goto out;
|
|
case IB_CM_REJ_RECEIVED:
|
|
cma_modify_qp_err(&id_priv->id);
|
|
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",
|
|
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, CMA_DESTROYING);
|
|
cma_release_remove(id_priv);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
out:
|
|
cma_release_remove(id_priv);
|
|
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;
|
|
__u16 port;
|
|
u8 ip_ver;
|
|
|
|
if (cma_get_net_info(ib_event->private_data, listen_id->ps,
|
|
&ip_ver, &port, &src, &dst))
|
|
goto err;
|
|
|
|
id = rdma_create_id(listen_id->event_handler, listen_id->context,
|
|
listen_id->ps);
|
|
if (IS_ERR(id))
|
|
goto err;
|
|
|
|
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 destroy_id;
|
|
|
|
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;
|
|
|
|
ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
|
|
ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
|
|
ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
|
|
rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
id_priv->state = CMA_CONNECT;
|
|
return id_priv;
|
|
|
|
destroy_id:
|
|
rdma_destroy_id(id);
|
|
err:
|
|
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;
|
|
__u16 port;
|
|
u8 ip_ver;
|
|
int ret;
|
|
|
|
id = rdma_create_id(listen_id->event_handler, listen_id->context,
|
|
listen_id->ps);
|
|
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);
|
|
|
|
ret = rdma_translate_ip(&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 = CMA_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;
|
|
atomic_inc(&listen_id->dev_remove);
|
|
if (!cma_comp(listen_id, CMA_LISTEN)) {
|
|
ret = -ECONNABORTED;
|
|
goto out;
|
|
}
|
|
|
|
memset(&event, 0, sizeof event);
|
|
offset = cma_user_data_offset(listen_id->id.ps);
|
|
event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
|
|
if (cma_is_ud_ps(listen_id->id.ps)) {
|
|
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;
|
|
}
|
|
|
|
atomic_inc(&conn_id->dev_remove);
|
|
mutex_lock(&lock);
|
|
ret = cma_acquire_dev(conn_id);
|
|
mutex_unlock(&lock);
|
|
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;
|
|
|
|
ret = conn_id->id.event_handler(&conn_id->id, &event);
|
|
if (!ret)
|
|
goto out;
|
|
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
conn_id->cm_id.ib = NULL;
|
|
|
|
release_conn_id:
|
|
cma_exch(conn_id, CMA_DESTROYING);
|
|
cma_release_remove(conn_id);
|
|
rdma_destroy_id(&conn_id->id);
|
|
|
|
out:
|
|
cma_release_remove(listen_id);
|
|
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;
|
|
__u32 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 = ~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 = ~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;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
atomic_inc(&id_priv->dev_remove);
|
|
|
|
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, CMA_DESTROYING);
|
|
cma_release_remove(id_priv);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
|
|
cma_release_remove(id_priv);
|
|
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;
|
|
|
|
listen_id = cm_id->context;
|
|
atomic_inc(&listen_id->dev_remove);
|
|
if (!cma_comp(listen_id, CMA_LISTEN)) {
|
|
ret = -ECONNABORTED;
|
|
goto out;
|
|
}
|
|
|
|
/* 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);
|
|
if (!new_cm_id) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
conn_id = container_of(new_cm_id, struct rdma_id_private, id);
|
|
atomic_inc(&conn_id->dev_remove);
|
|
conn_id->state = CMA_CONNECT;
|
|
|
|
dev = ip_dev_find(iw_event->local_addr.sin_addr.s_addr);
|
|
if (!dev) {
|
|
ret = -EADDRNOTAVAIL;
|
|
cma_release_remove(conn_id);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
|
|
if (ret) {
|
|
cma_release_remove(conn_id);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&lock);
|
|
ret = cma_acquire_dev(conn_id);
|
|
mutex_unlock(&lock);
|
|
if (ret) {
|
|
cma_release_remove(conn_id);
|
|
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;
|
|
|
|
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;
|
|
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, CMA_DESTROYING);
|
|
cma_release_remove(conn_id);
|
|
rdma_destroy_id(&conn_id->id);
|
|
}
|
|
|
|
out:
|
|
if (dev)
|
|
dev_put(dev);
|
|
cma_release_remove(listen_id);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_ib_listen(struct rdma_id_private *id_priv)
|
|
{
|
|
struct ib_cm_compare_data compare_data;
|
|
struct sockaddr *addr;
|
|
__be64 svc_id;
|
|
int ret;
|
|
|
|
id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
|
|
id_priv);
|
|
if (IS_ERR(id_priv->cm_id.ib))
|
|
return PTR_ERR(id_priv->cm_id.ib);
|
|
|
|
addr = &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;
|
|
|
|
id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
|
|
iw_conn_req_handler,
|
|
id_priv);
|
|
if (IS_ERR(id_priv->cm_id.iw))
|
|
return PTR_ERR(id_priv->cm_id.iw);
|
|
|
|
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);
|
|
if (IS_ERR(id))
|
|
return;
|
|
|
|
dev_id_priv = container_of(id, struct rdma_id_private, id);
|
|
|
|
dev_id_priv->state = CMA_ADDR_BOUND;
|
|
memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
|
|
ip_addr_size(&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);
|
|
|
|
ret = rdma_listen(id, id_priv->backlog);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return;
|
|
err:
|
|
cma_destroy_listen(dev_id_priv);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
|
|
{
|
|
struct sockaddr_in addr_in;
|
|
|
|
memset(&addr_in, 0, sizeof addr_in);
|
|
addr_in.sin_family = af;
|
|
return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
|
|
}
|
|
|
|
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 == CMA_IDLE) {
|
|
ret = cma_bind_any(id, AF_INET);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
|
|
return -EINVAL;
|
|
|
|
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, CMA_LISTEN, CMA_ADDR_BOUND);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_listen);
|
|
|
|
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 = CMA_ROUTE_QUERY;
|
|
work->new_state = CMA_ADDR_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
|
|
work->event.status = status;
|
|
}
|
|
|
|
queue_work(cma_wq, &work->work);
|
|
}
|
|
|
|
static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
|
|
struct cma_work *work)
|
|
{
|
|
struct rdma_dev_addr *addr = &id_priv->id.route.addr.dev_addr;
|
|
struct ib_sa_path_rec path_rec;
|
|
|
|
memset(&path_rec, 0, sizeof path_rec);
|
|
ib_addr_get_sgid(addr, &path_rec.sgid);
|
|
ib_addr_get_dgid(addr, &path_rec.dgid);
|
|
path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(addr));
|
|
path_rec.numb_path = 1;
|
|
|
|
id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
|
|
id_priv->id.port_num, &path_rec,
|
|
IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
|
|
IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH,
|
|
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;
|
|
|
|
atomic_inc(&id_priv->dev_remove);
|
|
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, CMA_DESTROYING);
|
|
destroy = 1;
|
|
}
|
|
out:
|
|
cma_release_remove(id_priv);
|
|
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 = CMA_ROUTE_QUERY;
|
|
work->new_state = CMA_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, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
|
|
return -EINVAL;
|
|
|
|
id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
|
|
if (!id->route.path_rec) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_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 = CMA_ROUTE_QUERY;
|
|
work->new_state = CMA_ROUTE_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
|
|
queue_work(cma_wq, &work->work);
|
|
return 0;
|
|
}
|
|
|
|
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, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
|
|
return -EINVAL;
|
|
|
|
atomic_inc(&id_priv->refcount);
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
ret = cma_resolve_ib_route(id_priv, timeout_ms);
|
|
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, CMA_ROUTE_QUERY, CMA_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;
|
|
|
|
ib_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);
|
|
atomic_inc(&id_priv->dev_remove);
|
|
|
|
/*
|
|
* Grab mutex to block rdma_destroy_id() from removing the device while
|
|
* we're trying to acquire it.
|
|
*/
|
|
mutex_lock(&lock);
|
|
if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
|
|
mutex_unlock(&lock);
|
|
goto out;
|
|
}
|
|
|
|
if (!status && !id_priv->cma_dev)
|
|
status = cma_acquire_dev(id_priv);
|
|
mutex_unlock(&lock);
|
|
|
|
if (status) {
|
|
if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_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, CMA_DESTROYING);
|
|
cma_release_remove(id_priv);
|
|
cma_deref_id(id_priv);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return;
|
|
}
|
|
out:
|
|
cma_release_remove(id_priv);
|
|
cma_deref_id(id_priv);
|
|
}
|
|
|
|
static int cma_resolve_loopback(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_work *work;
|
|
struct sockaddr_in *src_in, *dst_in;
|
|
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;
|
|
}
|
|
|
|
ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
|
|
if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
|
|
src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
|
|
dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
|
|
src_in->sin_family = dst_in->sin_family;
|
|
src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
|
|
}
|
|
|
|
work->id = id_priv;
|
|
INIT_WORK(&work->work, cma_work_handler);
|
|
work->old_state = CMA_ADDR_QUERY;
|
|
work->new_state = CMA_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)
|
|
return rdma_bind_addr(id, src_addr);
|
|
else
|
|
return cma_bind_any(id, dst_addr->sa_family);
|
|
}
|
|
|
|
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 == CMA_IDLE) {
|
|
ret = cma_bind_addr(id, src_addr, dst_addr);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_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, &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, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
|
|
cma_deref_id(id_priv);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_resolve_addr);
|
|
|
|
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 = kmalloc(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)
|
|
{
|
|
struct rdma_bind_list *bind_list;
|
|
int port, ret;
|
|
|
|
bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
|
|
if (!bind_list)
|
|
return -ENOMEM;
|
|
|
|
retry:
|
|
do {
|
|
ret = idr_get_new_above(ps, bind_list, next_port, &port);
|
|
} while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
|
|
|
|
if (ret)
|
|
goto err1;
|
|
|
|
if (port > sysctl_local_port_range[1]) {
|
|
if (next_port != sysctl_local_port_range[0]) {
|
|
idr_remove(ps, port);
|
|
next_port = sysctl_local_port_range[0];
|
|
goto retry;
|
|
}
|
|
ret = -EADDRNOTAVAIL;
|
|
goto err2;
|
|
}
|
|
|
|
if (port == sysctl_local_port_range[1])
|
|
next_port = sysctl_local_port_range[0];
|
|
else
|
|
next_port = port + 1;
|
|
|
|
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_use_port(struct idr *ps, struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_id_private *cur_id;
|
|
struct sockaddr_in *sin, *cur_sin;
|
|
struct rdma_bind_list *bind_list;
|
|
struct hlist_node *node;
|
|
unsigned short snum;
|
|
|
|
sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
|
|
snum = ntohs(sin->sin_port);
|
|
if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
|
|
return -EACCES;
|
|
|
|
bind_list = idr_find(ps, snum);
|
|
if (!bind_list)
|
|
return cma_alloc_port(ps, id_priv, snum);
|
|
|
|
/*
|
|
* We don't support binding to any address if anyone is bound to
|
|
* a specific address on the same port.
|
|
*/
|
|
if (cma_any_addr(&id_priv->id.route.addr.src_addr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
|
|
if (cma_any_addr(&cur_id->id.route.addr.src_addr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
|
|
if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
|
|
return -EADDRINUSE;
|
|
}
|
|
|
|
cma_bind_port(bind_list, id_priv);
|
|
return 0;
|
|
}
|
|
|
|
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(&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;
|
|
}
|
|
|
|
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)
|
|
return -EAFNOSUPPORT;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
|
|
return -EINVAL;
|
|
|
|
if (!cma_any_addr(addr)) {
|
|
ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
|
|
if (ret)
|
|
goto err1;
|
|
|
|
mutex_lock(&lock);
|
|
ret = cma_acquire_dev(id_priv);
|
|
mutex_unlock(&lock);
|
|
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 (!cma_any_addr(addr)) {
|
|
mutex_lock(&lock);
|
|
cma_detach_from_dev(id_priv);
|
|
mutex_unlock(&lock);
|
|
}
|
|
err1:
|
|
cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_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 sockaddr_in *src4, *dst4;
|
|
struct cma_hdr *cma_hdr;
|
|
struct sdp_hh *sdp_hdr;
|
|
|
|
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;
|
|
}
|
|
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;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
atomic_inc(&id_priv->dev_remove);
|
|
if (!cma_comp(id_priv, CMA_CONNECT))
|
|
goto out;
|
|
|
|
switch (ib_event->event) {
|
|
case IB_CM_SIDR_REQ_ERROR:
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = -ETIMEDOUT;
|
|
break;
|
|
case IB_CM_SIDR_REP_RECEIVED:
|
|
event.param.ud.private_data = ib_event->private_data;
|
|
event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
|
|
if (rep->status != IB_SIDR_SUCCESS) {
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = ib_event->param.sidr_rep_rcvd.status;
|
|
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",
|
|
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, CMA_DESTROYING);
|
|
cma_release_remove(id_priv);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
out:
|
|
cma_release_remove(id_priv);
|
|
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;
|
|
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_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
|
|
cma_sidr_rep_handler, id_priv);
|
|
if (IS_ERR(id_priv->cm_id.ib)) {
|
|
ret = PTR_ERR(id_priv->cm_id.ib);
|
|
goto out;
|
|
}
|
|
|
|
req.path = route->path_rec;
|
|
req.service_id = cma_get_service_id(id_priv->id.ps,
|
|
&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;
|
|
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_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
|
|
id_priv);
|
|
if (IS_ERR(id_priv->cm_id.ib)) {
|
|
ret = PTR_ERR(id_priv->cm_id.ib);
|
|
goto out;
|
|
}
|
|
|
|
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,
|
|
&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_priv->cm_id.ib)) {
|
|
ib_destroy_cm_id(id_priv->cm_id.ib);
|
|
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)) {
|
|
ret = PTR_ERR(cm_id);
|
|
goto out;
|
|
}
|
|
|
|
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->id);
|
|
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 && !IS_ERR(cm_id)) {
|
|
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, CMA_ROUTE_RESOLVED, CMA_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 (cma_is_ud_ps(id->ps))
|
|
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, CMA_CONNECT, CMA_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;
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
if (id_priv->id.qp) {
|
|
ret = cma_modify_qp_rtr(&id_priv->id);
|
|
if (ret)
|
|
goto out;
|
|
|
|
qp_attr.qp_state = IB_QPS_RTS;
|
|
ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, &qp_attr,
|
|
&qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
qp_attr.max_rd_atomic = conn_param->initiator_depth;
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
|
|
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.target_ack_delay = CMA_CM_RESPONSE_TIMEOUT;
|
|
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->id);
|
|
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;
|
|
|
|
memset(&rep, 0, sizeof rep);
|
|
rep.status = status;
|
|
if (status == IB_SIDR_SUCCESS) {
|
|
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);
|
|
if (!cma_comp(id_priv, CMA_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 (cma_is_ud_ps(id->ps))
|
|
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);
|
|
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 (!cma_comp(id_priv, CMA_CONNECT))
|
|
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 (!cma_comp(id_priv, CMA_CONNECT))
|
|
return -EINVAL;
|
|
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (cma_is_ud_ps(id->ps))
|
|
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 (!cma_comp(id_priv, CMA_CONNECT) &&
|
|
!cma_comp(id_priv, CMA_DISCONNECT))
|
|
return -EINVAL;
|
|
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
ret = cma_modify_qp_err(id);
|
|
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;
|
|
atomic_inc(&id_priv->dev_remove);
|
|
if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
|
|
!cma_comp(id_priv, CMA_ADDR_RESOLVED))
|
|
goto out;
|
|
|
|
if (!status && id_priv->id.qp)
|
|
status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
|
|
multicast->rec.mlid);
|
|
|
|
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, CMA_DESTROYING);
|
|
cma_release_remove(id_priv);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return 0;
|
|
}
|
|
out:
|
|
cma_release_remove(id_priv);
|
|
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]) & 0xFF10A01B) ==
|
|
0xFF10A01B)) {
|
|
/* IPv6 address is an SA assigned MGID. */
|
|
memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
|
|
} else {
|
|
ip_ib_mc_map(sin->sin_addr.s_addr, mc_map);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
mc_map[7] = 0x01; /* Use RDMA CM signature */
|
|
mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8;
|
|
mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr);
|
|
*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, &mc->addr, &rec.mgid);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
|
|
ib_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;
|
|
|
|
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;
|
|
}
|
|
|
|
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, CMA_ADDR_BOUND) &&
|
|
!cma_comp(id_priv, CMA_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:
|
|
ret = cma_join_ib_multicast(id_priv, mc);
|
|
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);
|
|
ib_sa_free_multicast(mc->multicast.ib);
|
|
kfree(mc);
|
|
return;
|
|
}
|
|
}
|
|
spin_unlock_irq(&id_priv->lock);
|
|
}
|
|
EXPORT_SYMBOL(rdma_leave_multicast);
|
|
|
|
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;
|
|
cma_dev->node_guid = device->node_guid;
|
|
|
|
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 cma_state state;
|
|
|
|
/* Record that we want to remove the device */
|
|
state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
|
|
if (state == CMA_DESTROYING)
|
|
return 0;
|
|
|
|
cma_cancel_operation(id_priv, state);
|
|
wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
|
|
|
|
/* Check for destruction from another callback. */
|
|
if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
|
|
return 0;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
|
|
return id_priv->id.event_handler(&id_priv->id, &event);
|
|
}
|
|
|
|
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);
|
|
|
|
if (cma_internal_listen(id_priv)) {
|
|
cma_destroy_listen(id_priv);
|
|
continue;
|
|
}
|
|
|
|
list_del_init(&id_priv->list);
|
|
atomic_inc(&id_priv->refcount);
|
|
mutex_unlock(&lock);
|
|
|
|
ret = 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_init(void)
|
|
{
|
|
int ret;
|
|
|
|
get_random_bytes(&next_port, sizeof next_port);
|
|
next_port = (next_port % (sysctl_local_port_range[1] -
|
|
sysctl_local_port_range[0])) +
|
|
sysctl_local_port_range[0];
|
|
cma_wq = create_singlethread_workqueue("rdma_cm");
|
|
if (!cma_wq)
|
|
return -ENOMEM;
|
|
|
|
ib_sa_register_client(&sa_client);
|
|
rdma_addr_register_client(&addr_client);
|
|
|
|
ret = ib_register_client(&cma_client);
|
|
if (ret)
|
|
goto err;
|
|
return 0;
|
|
|
|
err:
|
|
rdma_addr_unregister_client(&addr_client);
|
|
ib_sa_unregister_client(&sa_client);
|
|
destroy_workqueue(cma_wq);
|
|
return ret;
|
|
}
|
|
|
|
static void cma_cleanup(void)
|
|
{
|
|
ib_unregister_client(&cma_client);
|
|
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);
|