[linux-2.6-block.git] / net / rds / iw.c

/*
 * Copyright (c) 2006 Oracle.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
#include <linux/kernel.h>
#include <linux/in.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/if_arp.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>

#include "rds.h"
#include "iw.h"

unsigned int fastreg_pool_size = RDS_FASTREG_POOL_SIZE;
unsigned int fastreg_message_size = RDS_FASTREG_SIZE + 1; /* +1 allows for unaligned MRs */

module_param(fastreg_pool_size, int, 0444);
MODULE_PARM_DESC(fastreg_pool_size, " Max number of fastreg MRs per device");
module_param(fastreg_message_size, int, 0444);
MODULE_PARM_DESC(fastreg_message_size, " Max size of a RDMA transfer (fastreg MRs)");

struct list_head rds_iw_devices;

/* NOTE: if also grabbing iwdev lock, grab this first */
DEFINE_SPINLOCK(iw_nodev_conns_lock);
LIST_HEAD(iw_nodev_conns);

static void rds_iw_add_one(struct ib_device *device)
{
	struct rds_iw_device *rds_iwdev;
	struct ib_device_attr *dev_attr;

	/* Only handle iwarp devices */
	if (device->node_type != RDMA_NODE_RNIC)
		return;

	dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL);
	if (!dev_attr)
		return;

	if (ib_query_device(device, dev_attr)) {
		rdsdebug("Query device failed for %s\n", device->name);
		goto free_attr;
	}

	rds_iwdev = kmalloc(sizeof *rds_iwdev, GFP_KERNEL);
	if (!rds_iwdev)
		goto free_attr;

	spin_lock_init(&rds_iwdev->spinlock);

	rds_iwdev->dma_local_lkey = !!(dev_attr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY);
	rds_iwdev->max_wrs = dev_attr->max_qp_wr;
	rds_iwdev->max_sge = min(dev_attr->max_sge, RDS_IW_MAX_SGE);

	rds_iwdev->dev = device;
	rds_iwdev->pd = ib_alloc_pd(device);
	if (IS_ERR(rds_iwdev->pd))
		goto free_dev;

	if (!rds_iwdev->dma_local_lkey) {
		rds_iwdev->mr = ib_get_dma_mr(rds_iwdev->pd,
					IB_ACCESS_REMOTE_READ |
					IB_ACCESS_REMOTE_WRITE |
					IB_ACCESS_LOCAL_WRITE);
		if (IS_ERR(rds_iwdev->mr))
			goto err_pd;
	} else
		rds_iwdev->mr = NULL;

	rds_iwdev->mr_pool = rds_iw_create_mr_pool(rds_iwdev);
	if (IS_ERR(rds_iwdev->mr_pool)) {
		rds_iwdev->mr_pool = NULL;
		goto err_mr;
	}

	INIT_LIST_HEAD(&rds_iwdev->cm_id_list);
	INIT_LIST_HEAD(&rds_iwdev->conn_list);
	list_add_tail(&rds_iwdev->list, &rds_iw_devices);

	ib_set_client_data(device, &rds_iw_client, rds_iwdev);

	goto free_attr;

err_mr:
	if (rds_iwdev->mr)
		ib_dereg_mr(rds_iwdev->mr);
err_pd:
	ib_dealloc_pd(rds_iwdev->pd);
free_dev:
	kfree(rds_iwdev);
free_attr:
	kfree(dev_attr);
}

static void rds_iw_remove_one(struct ib_device *device)
{
	struct rds_iw_device *rds_iwdev;
	struct rds_iw_cm_id *i_cm_id, *next;

	rds_iwdev = ib_get_client_data(device, &rds_iw_client);
	if (!rds_iwdev)
		return;

	spin_lock_irq(&rds_iwdev->spinlock);
	list_for_each_entry_safe(i_cm_id, next, &rds_iwdev->cm_id_list, list) {
		list_del(&i_cm_id->list);
		kfree(i_cm_id);
	}
	spin_unlock_irq(&rds_iwdev->spinlock);

	rds_iw_destroy_conns(rds_iwdev);

	if (rds_iwdev->mr_pool)
		rds_iw_destroy_mr_pool(rds_iwdev->mr_pool);

	if (rds_iwdev->mr)
		ib_dereg_mr(rds_iwdev->mr);

	while (ib_dealloc_pd(rds_iwdev->pd)) {
		rdsdebug("Failed to dealloc pd %p\n", rds_iwdev->pd);
		msleep(1);
	}

	list_del(&rds_iwdev->list);
	kfree(rds_iwdev);
}

struct ib_client rds_iw_client = {
	.name   = "rds_iw",
	.add    = rds_iw_add_one,
	.remove = rds_iw_remove_one
};

static int rds_iw_conn_info_visitor(struct rds_connection *conn,
				    void *buffer)
{
	struct rds_info_rdma_connection *iinfo = buffer;
	struct rds_iw_connection *ic;

	/* We will only ever look at IB transports */
	if (conn->c_trans != &rds_iw_transport)
		return 0;

	iinfo->src_addr = conn->c_laddr;
	iinfo->dst_addr = conn->c_faddr;

	memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
	memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
	if (rds_conn_state(conn) == RDS_CONN_UP) {
		struct rds_iw_device *rds_iwdev;
		struct rdma_dev_addr *dev_addr;

		ic = conn->c_transport_data;
		dev_addr = &ic->i_cm_id->route.addr.dev_addr;

		rdma_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
		rdma_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);

		rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
		iinfo->max_send_wr = ic->i_send_ring.w_nr;
		iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
		iinfo->max_send_sge = rds_iwdev->max_sge;
		rds_iw_get_mr_info(rds_iwdev, iinfo);
	}
	return 1;
}

static void rds_iw_ic_info(struct socket *sock, unsigned int len,
			   struct rds_info_iterator *iter,
			   struct rds_info_lengths *lens)
{
	rds_for_each_conn_info(sock, len, iter, lens,
				rds_iw_conn_info_visitor,
				sizeof(struct rds_info_rdma_connection));
}


/*
 * Early RDS/IB was built to only bind to an address if there is an IPoIB
 * device with that address set.
 *
 * If it were me, I'd advocate for something more flexible.  Sending and
 * receiving should be device-agnostic.  Transports would try and maintain
 * connections between peers who have messages queued.  Userspace would be
 * allowed to influence which paths have priority.  We could call userspace
 * asserting this policy "routing".
 */
static int rds_iw_laddr_check(__be32 addr)
{
	int ret;
	struct rdma_cm_id *cm_id;
	struct sockaddr_in sin;

	/* Create a CMA ID and try to bind it. This catches both
	 * IB and iWARP capable NICs.
	 */
	cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP, IB_QPT_RC);
	if (IS_ERR(cm_id))
		return PTR_ERR(cm_id);

	memset(&sin, 0, sizeof(sin));
	sin.sin_family = AF_INET;
	sin.sin_addr.s_addr = addr;

	/* rdma_bind_addr will only succeed for IB & iWARP devices */
	ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
	/* due to this, we will claim to support IB devices unless we
	   check node_type. */
	if (ret || !cm_id->device ||
	    cm_id->device->node_type != RDMA_NODE_RNIC)
		ret = -EADDRNOTAVAIL;

	rdsdebug("addr %pI4 ret %d node type %d\n",
		&addr, ret,
		cm_id->device ? cm_id->device->node_type : -1);

	rdma_destroy_id(cm_id);

	return ret;
}

void rds_iw_exit(void)
{
	rds_info_deregister_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
	rds_iw_destroy_nodev_conns();
	ib_unregister_client(&rds_iw_client);
	rds_iw_sysctl_exit();
	rds_iw_recv_exit();
	rds_trans_unregister(&rds_iw_transport);
}

struct rds_transport rds_iw_transport = {
	.laddr_check		= rds_iw_laddr_check,
	.xmit_complete		= rds_iw_xmit_complete,
	.xmit			= rds_iw_xmit,
	.xmit_rdma		= rds_iw_xmit_rdma,
	.recv			= rds_iw_recv,
	.conn_alloc		= rds_iw_conn_alloc,
	.conn_free		= rds_iw_conn_free,
	.conn_connect		= rds_iw_conn_connect,
	.conn_shutdown		= rds_iw_conn_shutdown,
	.inc_copy_to_user	= rds_iw_inc_copy_to_user,
	.inc_free		= rds_iw_inc_free,
	.cm_initiate_connect	= rds_iw_cm_initiate_connect,
	.cm_handle_connect	= rds_iw_cm_handle_connect,
	.cm_connect_complete	= rds_iw_cm_connect_complete,
	.stats_info_copy	= rds_iw_stats_info_copy,
	.exit			= rds_iw_exit,
	.get_mr			= rds_iw_get_mr,
	.sync_mr		= rds_iw_sync_mr,
	.free_mr		= rds_iw_free_mr,
	.flush_mrs		= rds_iw_flush_mrs,
	.t_owner		= THIS_MODULE,
	.t_name			= "iwarp",
	.t_type			= RDS_TRANS_IWARP,
	.t_prefer_loopback	= 1,
};

int rds_iw_init(void)
{
	int ret;

	INIT_LIST_HEAD(&rds_iw_devices);

	ret = ib_register_client(&rds_iw_client);
	if (ret)
		goto out;

	ret = rds_iw_sysctl_init();
	if (ret)
		goto out_ibreg;

	ret = rds_iw_recv_init();
	if (ret)
		goto out_sysctl;

	ret = rds_trans_register(&rds_iw_transport);
	if (ret)
		goto out_recv;

	rds_info_register_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);

	goto out;

out_recv:
	rds_iw_recv_exit();
out_sysctl:
	rds_iw_sysctl_exit();
out_ibreg:
	ib_unregister_client(&rds_iw_client);
out:
	return ret;
}

MODULE_LICENSE("GPL");
Commit	Line	Data
fcd8b7c0 AG	1	/*
	2	* Copyright (c) 2006 Oracle. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*
	32	*/
	33	#include <linux/kernel.h>
	34	#include <linux/in.h>
	35	#include <linux/if.h>
	36	#include <linux/netdevice.h>
	37	#include <linux/inetdevice.h>
	38	#include <linux/if_arp.h>
	39	#include <linux/delay.h>
5a0e3ad6	40	#include <linux/slab.h>
3a9a231d	41	#include <linux/module.h>
fcd8b7c0 AG	42
	43	#include "rds.h"
	44	#include "iw.h"
	45
	46	unsigned int fastreg_pool_size = RDS_FASTREG_POOL_SIZE;
	47	unsigned int fastreg_message_size = RDS_FASTREG_SIZE + 1; /* +1 allows for unaligned MRs */
	48
	49	module_param(fastreg_pool_size, int, 0444);
	50	MODULE_PARM_DESC(fastreg_pool_size, " Max number of fastreg MRs per device");
	51	module_param(fastreg_message_size, int, 0444);
	52	MODULE_PARM_DESC(fastreg_message_size, " Max size of a RDMA transfer (fastreg MRs)");
	53
	54	struct list_head rds_iw_devices;
	55
745cbcca	56	/* NOTE: if also grabbing iwdev lock, grab this first */
fcd8b7c0 AG	57	DEFINE_SPINLOCK(iw_nodev_conns_lock);
	58	LIST_HEAD(iw_nodev_conns);
	59
ff51bf84	60	static void rds_iw_add_one(struct ib_device *device)
fcd8b7c0 AG	61	{
	62	struct rds_iw_device *rds_iwdev;
	63	struct ib_device_attr *dev_attr;
	64
	65	/* Only handle iwarp devices */
	66	if (device->node_type != RDMA_NODE_RNIC)
	67	return;
	68
	69	dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL);
	70	if (!dev_attr)
	71	return;
	72
	73	if (ib_query_device(device, dev_attr)) {
	74	rdsdebug("Query device failed for %s\n", device->name);
	75	goto free_attr;
	76	}
	77
	78	rds_iwdev = kmalloc(sizeof *rds_iwdev, GFP_KERNEL);
	79	if (!rds_iwdev)
	80	goto free_attr;
	81
	82	spin_lock_init(&rds_iwdev->spinlock);
	83
	84	rds_iwdev->dma_local_lkey = !!(dev_attr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY);
	85	rds_iwdev->max_wrs = dev_attr->max_qp_wr;
	86	rds_iwdev->max_sge = min(dev_attr->max_sge, RDS_IW_MAX_SGE);
	87
fcd8b7c0 AG	88	rds_iwdev->dev = device;
	89	rds_iwdev->pd = ib_alloc_pd(device);
	90	if (IS_ERR(rds_iwdev->pd))
	91	goto free_dev;
	92
	93	if (!rds_iwdev->dma_local_lkey) {
ed9e352a AG	94	rds_iwdev->mr = ib_get_dma_mr(rds_iwdev->pd,
	95	IB_ACCESS_REMOTE_READ \|
	96	IB_ACCESS_REMOTE_WRITE \|
	97	IB_ACCESS_LOCAL_WRITE);
fcd8b7c0 AG	98	if (IS_ERR(rds_iwdev->mr))
	99	goto err_pd;
	100	} else
	101	rds_iwdev->mr = NULL;
	102
	103	rds_iwdev->mr_pool = rds_iw_create_mr_pool(rds_iwdev);
	104	if (IS_ERR(rds_iwdev->mr_pool)) {
	105	rds_iwdev->mr_pool = NULL;
	106	goto err_mr;
	107	}
	108
	109	INIT_LIST_HEAD(&rds_iwdev->cm_id_list);
	110	INIT_LIST_HEAD(&rds_iwdev->conn_list);
	111	list_add_tail(&rds_iwdev->list, &rds_iw_devices);
	112
	113	ib_set_client_data(device, &rds_iw_client, rds_iwdev);
	114
	115	goto free_attr;
	116
	117	err_mr:
	118	if (rds_iwdev->mr)
	119	ib_dereg_mr(rds_iwdev->mr);
	120	err_pd:
	121	ib_dealloc_pd(rds_iwdev->pd);
	122	free_dev:
	123	kfree(rds_iwdev);
	124	free_attr:
	125	kfree(dev_attr);
	126	}
	127
ff51bf84	128	static void rds_iw_remove_one(struct ib_device *device)
fcd8b7c0 AG	129	{
	130	struct rds_iw_device *rds_iwdev;
	131	struct rds_iw_cm_id i_cm_id, next;
	132
	133	rds_iwdev = ib_get_client_data(device, &rds_iw_client);
	134	if (!rds_iwdev)
	135	return;
	136
	137	spin_lock_irq(&rds_iwdev->spinlock);
	138	list_for_each_entry_safe(i_cm_id, next, &rds_iwdev->cm_id_list, list) {
	139	list_del(&i_cm_id->list);
	140	kfree(i_cm_id);
	141	}
	142	spin_unlock_irq(&rds_iwdev->spinlock);
	143
745cbcca	144	rds_iw_destroy_conns(rds_iwdev);
fcd8b7c0 AG	145
	146	if (rds_iwdev->mr_pool)
	147	rds_iw_destroy_mr_pool(rds_iwdev->mr_pool);
	148
	149	if (rds_iwdev->mr)
	150	ib_dereg_mr(rds_iwdev->mr);
	151
	152	while (ib_dealloc_pd(rds_iwdev->pd)) {
	153	rdsdebug("Failed to dealloc pd %p\n", rds_iwdev->pd);
	154	msleep(1);
	155	}
	156
	157	list_del(&rds_iwdev->list);
	158	kfree(rds_iwdev);
	159	}
	160
	161	struct ib_client rds_iw_client = {
	162	.name = "rds_iw",
	163	.add = rds_iw_add_one,
	164	.remove = rds_iw_remove_one
	165	};
	166
	167	static int rds_iw_conn_info_visitor(struct rds_connection *conn,
	168	void *buffer)
	169	{
	170	struct rds_info_rdma_connection *iinfo = buffer;
	171	struct rds_iw_connection *ic;
	172
	173	/* We will only ever look at IB transports */
	174	if (conn->c_trans != &rds_iw_transport)
	175	return 0;
	176
	177	iinfo->src_addr = conn->c_laddr;
	178	iinfo->dst_addr = conn->c_faddr;
	179
	180	memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
	181	memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
	182	if (rds_conn_state(conn) == RDS_CONN_UP) {
	183	struct rds_iw_device *rds_iwdev;
	184	struct rdma_dev_addr *dev_addr;
	185
	186	ic = conn->c_transport_data;
	187	dev_addr = &ic->i_cm_id->route.addr.dev_addr;
	188
6f8372b6 SH	189	rdma_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
6f8372b6 SH	190	rdma_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);
fcd8b7c0 AG	191
	192	rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
	193	iinfo->max_send_wr = ic->i_send_ring.w_nr;
	194	iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
	195	iinfo->max_send_sge = rds_iwdev->max_sge;
	196	rds_iw_get_mr_info(rds_iwdev, iinfo);
	197	}
	198	return 1;
	199	}
	200
	201	static void rds_iw_ic_info(struct socket *sock, unsigned int len,
	202	struct rds_info_iterator *iter,
	203	struct rds_info_lengths *lens)
	204	{
	205	rds_for_each_conn_info(sock, len, iter, lens,
	206	rds_iw_conn_info_visitor,
	207	sizeof(struct rds_info_rdma_connection));
	208	}
	209
	210
	211	/*
	212	* Early RDS/IB was built to only bind to an address if there is an IPoIB
	213	* device with that address set.
	214	*
	215	* If it were me, I'd advocate for something more flexible. Sending and
	216	* receiving should be device-agnostic. Transports would try and maintain
	217	* connections between peers who have messages queued. Userspace would be
	218	* allowed to influence which paths have priority. We could call userspace
	219	* asserting this policy "routing".
	220	*/
	221	static int rds_iw_laddr_check(__be32 addr)
	222	{
	223	int ret;
	224	struct rdma_cm_id *cm_id;
	225	struct sockaddr_in sin;
	226
	227	/* Create a CMA ID and try to bind it. This catches both
	228	* IB and iWARP capable NICs.
	229	*/
b26f9b99	230	cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP, IB_QPT_RC);
5d57eeb5 DC	231	if (IS_ERR(cm_id))
5d57eeb5 DC	232	return PTR_ERR(cm_id);
fcd8b7c0 AG	233
	234	memset(&sin, 0, sizeof(sin));
	235	sin.sin_family = AF_INET;
	236	sin.sin_addr.s_addr = addr;
	237
	238	/* rdma_bind_addr will only succeed for IB & iWARP devices */
	239	ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
	240	/* due to this, we will claim to support IB devices unless we
	241	check node_type. */
bf39b424 SL	242	if (ret \|\| !cm_id->device \|\|
bf39b424 SL	243	cm_id->device->node_type != RDMA_NODE_RNIC)
fcd8b7c0 AG	244	ret = -EADDRNOTAVAIL;
	245
	246	rdsdebug("addr %pI4 ret %d node type %d\n",
	247	&addr, ret,
	248	cm_id->device ? cm_id->device->node_type : -1);
	249
	250	rdma_destroy_id(cm_id);
	251
	252	return ret;
	253	}
	254
	255	void rds_iw_exit(void)
	256	{
	257	rds_info_deregister_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
745cbcca	258	rds_iw_destroy_nodev_conns();
fcd8b7c0 AG	259	ib_unregister_client(&rds_iw_client);
	260	rds_iw_sysctl_exit();
	261	rds_iw_recv_exit();
	262	rds_trans_unregister(&rds_iw_transport);
	263	}
	264
	265	struct rds_transport rds_iw_transport = {
	266	.laddr_check = rds_iw_laddr_check,
	267	.xmit_complete = rds_iw_xmit_complete,
	268	.xmit = rds_iw_xmit,
fcd8b7c0 AG	269	.xmit_rdma = rds_iw_xmit_rdma,
	270	.recv = rds_iw_recv,
	271	.conn_alloc = rds_iw_conn_alloc,
	272	.conn_free = rds_iw_conn_free,
	273	.conn_connect = rds_iw_conn_connect,
	274	.conn_shutdown = rds_iw_conn_shutdown,
	275	.inc_copy_to_user = rds_iw_inc_copy_to_user,
fcd8b7c0 AG	276	.inc_free = rds_iw_inc_free,
	277	.cm_initiate_connect = rds_iw_cm_initiate_connect,
	278	.cm_handle_connect = rds_iw_cm_handle_connect,
	279	.cm_connect_complete = rds_iw_cm_connect_complete,
	280	.stats_info_copy = rds_iw_stats_info_copy,
	281	.exit = rds_iw_exit,
	282	.get_mr = rds_iw_get_mr,
	283	.sync_mr = rds_iw_sync_mr,
	284	.free_mr = rds_iw_free_mr,
	285	.flush_mrs = rds_iw_flush_mrs,
	286	.t_owner = THIS_MODULE,
	287	.t_name = "iwarp",
335776bd	288	.t_type = RDS_TRANS_IWARP,
fcd8b7c0 AG	289	.t_prefer_loopback = 1,
	290	};
	291
ef87b7ea	292	int rds_iw_init(void)
fcd8b7c0 AG	293	{
	294	int ret;
	295
	296	INIT_LIST_HEAD(&rds_iw_devices);
	297
	298	ret = ib_register_client(&rds_iw_client);
	299	if (ret)
	300	goto out;
	301
	302	ret = rds_iw_sysctl_init();
	303	if (ret)
	304	goto out_ibreg;
	305
	306	ret = rds_iw_recv_init();
	307	if (ret)
	308	goto out_sysctl;
	309
	310	ret = rds_trans_register(&rds_iw_transport);
	311	if (ret)
	312	goto out_recv;
	313
	314	rds_info_register_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
	315
	316	goto out;
	317
	318	out_recv:
	319	rds_iw_recv_exit();
	320	out_sysctl:
	321	rds_iw_sysctl_exit();
	322	out_ibreg:
	323	ib_unregister_client(&rds_iw_client);
	324	out:
	325	return ret;
	326	}
	327
	328	MODULE_LICENSE("GPL");
	329