a1b1b61f80
Connection information was never given to the recipient of a connection request or reply message. Only the event was delivered. Report the connection data with the event to allows user to reject the connection based on the requested parameters, or adjust their resources to match the request. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2263 lines
54 KiB
C
2263 lines
54 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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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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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 qp_num;
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u8 srq;
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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 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_acquire_dev(struct rdma_id_private *id_priv)
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{
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enum rdma_node_type dev_type = id_priv->id.route.addr.dev_addr.dev_type;
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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_type)) {
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case RDMA_TRANSPORT_IB:
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ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
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break;
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case RDMA_TRANSPORT_IWARP:
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iw_addr_get_sgid(&id_priv->id.route.addr.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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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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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_ib_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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struct rdma_dev_addr *dev_addr;
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int ret;
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dev_addr = &id_priv->id.route.addr.dev_addr;
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ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
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ib_addr_get_pkey(dev_addr),
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&qp_attr.pkey_index);
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if (ret)
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return ret;
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qp_attr.qp_state = IB_QPS_INIT;
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qp_attr.qp_access_flags = 0;
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qp_attr.port_num = id_priv->id.port_num;
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return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS |
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IB_QP_PKEY_INDEX | IB_QP_PORT);
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}
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static int cma_init_iw_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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qp_attr.qp_state = IB_QPS_INIT;
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qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE;
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return ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_ACCESS_FLAGS);
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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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switch (rdma_node_get_transport(id->device->node_type)) {
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case RDMA_TRANSPORT_IB:
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ret = cma_init_ib_qp(id_priv, qp);
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break;
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case RDMA_TRANSPORT_IWARP:
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ret = cma_init_iw_qp(id_priv, qp);
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break;
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default:
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ret = -ENOSYS;
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break;
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}
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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);
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}
|
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|
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static int cma_modify_qp_err(struct rdma_cm_id *id)
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{
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struct ib_qp_attr qp_attr;
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if (!id->qp)
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return 0;
|
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qp_attr.qp_state = IB_QPS_ERR;
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return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
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}
|
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int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
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int *qp_attr_mask)
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{
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struct rdma_id_private *id_priv;
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int ret;
|
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id_priv = container_of(id, struct rdma_id_private, id);
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switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
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case RDMA_TRANSPORT_IB:
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ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
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qp_attr_mask);
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if (qp_attr->qp_state == IB_QPS_RTR)
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qp_attr->rq_psn = id_priv->seq_num;
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break;
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case RDMA_TRANSPORT_IWARP:
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ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
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qp_attr_mask);
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break;
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default:
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ret = -ENOSYS;
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL(rdma_init_qp_attr);
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|
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static inline int cma_zero_addr(struct sockaddr *addr)
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{
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struct in6_addr *ip6;
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if (addr->sa_family == AF_INET)
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return ZERONET(((struct sockaddr_in *) addr)->sin_addr.s_addr);
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else {
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ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
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return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
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ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
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}
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}
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|
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static inline int cma_loopback_addr(struct sockaddr *addr)
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{
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return LOOPBACK(((struct sockaddr_in *) addr)->sin_addr.s_addr);
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}
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|
|
static inline int cma_any_addr(struct sockaddr *addr)
|
|
{
|
|
return cma_zero_addr(addr) || cma_loopback_addr(addr);
|
|
}
|
|
|
|
static inline int cma_any_port(struct sockaddr *addr)
|
|
{
|
|
return !((struct sockaddr_in *) addr)->sin_port;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
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 int cma_rtu_recv(struct rdma_id_private *id_priv)
|
|
{
|
|
int ret;
|
|
|
|
ret = cma_modify_qp_rts(&id_priv->id);
|
|
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 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:
|
|
event.status = cma_rtu_recv(id_priv);
|
|
event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
|
|
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_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 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;
|
|
}
|
|
|
|
conn_id = cma_new_id(&listen_id->id, ib_event);
|
|
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;
|
|
|
|
offset = cma_user_data_offset(listen_id->id.ps);
|
|
memset(&event, 0, sizeof event);
|
|
event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
|
|
cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
|
|
ib_event->private_data, offset);
|
|
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(((struct sockaddr_in *) addr)->sin_port));
|
|
}
|
|
|
|
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;
|
|
if (iw_event->status)
|
|
event.event = RDMA_CM_EVENT_REJECTED;
|
|
else
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
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, start, ret;
|
|
|
|
bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
|
|
if (!bind_list)
|
|
return -ENOMEM;
|
|
|
|
start = snum ? snum : sysctl_local_port_range[0];
|
|
|
|
do {
|
|
ret = idr_get_new_above(ps, bind_list, start, &port);
|
|
} while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
|
|
|
|
if (ret)
|
|
goto err;
|
|
|
|
if ((snum && port != snum) ||
|
|
(!snum && port > sysctl_local_port_range[1])) {
|
|
idr_remove(ps, port);
|
|
ret = -EADDRNOTAVAIL;
|
|
goto err;
|
|
}
|
|
|
|
bind_list->ps = ps;
|
|
bind_list->port = (unsigned short) port;
|
|
cma_bind_port(bind_list, id_priv);
|
|
return 0;
|
|
err:
|
|
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;
|
|
default:
|
|
return -EPROTONOSUPPORT;
|
|
}
|
|
|
|
mutex_lock(&lock);
|
|
if (cma_any_port(&id_priv->id.route.addr.src_addr))
|
|
ret = cma_alloc_port(ps, id_priv, 0);
|
|
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_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:
|
|
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;
|
|
int ret;
|
|
|
|
ret = cma_modify_qp_rtr(&id_priv->id);
|
|
if (ret)
|
|
return ret;
|
|
|
|
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;
|
|
|
|
return ib_send_cm_rep(id_priv->cm_id.ib, &rep);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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 (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_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:
|
|
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 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;
|
|
|
|
cma_wq = create_singlethread_workqueue("rdma_cm_wq");
|
|
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);
|
|
}
|
|
|
|
module_init(cma_init);
|
|
module_exit(cma_cleanup);
|