[deliverable/linux.git] / drivers / infiniband / ulp / ipoib / ipoib_netlink.c

/*
 * Copyright (c) 2012 Mellanox Technologies. -  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/netdevice.h>
#include <linux/module.h>
#include <net/rtnetlink.h>
#include "ipoib.h"

static const struct nla_policy ipoib_policy[IFLA_IPOIB_MAX + 1] = {
	[IFLA_IPOIB_PKEY]	= { .type = NLA_U16 },
	[IFLA_IPOIB_MODE]	= { .type = NLA_U16 },
	[IFLA_IPOIB_UMCAST]	= { .type = NLA_U16 },
};

static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	u16 val;

	if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey))
		goto nla_put_failure;

	val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
	if (nla_put_u16(skb, IFLA_IPOIB_MODE, val))
		goto nla_put_failure;

	val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags);
	if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val))
		goto nla_put_failure;

	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int ipoib_changelink(struct net_device *dev,
			    struct nlattr *tb[], struct nlattr *data[])
{
	u16 mode, umcast;
	int ret = 0;

	if (data[IFLA_IPOIB_MODE]) {
		mode  = nla_get_u16(data[IFLA_IPOIB_MODE]);
		if (mode == IPOIB_MODE_DATAGRAM)
			ret = ipoib_set_mode(dev, "datagram\n");
		else if (mode == IPOIB_MODE_CONNECTED)
			ret = ipoib_set_mode(dev, "connected\n");
		else
			ret = -EINVAL;

		if (ret < 0)
			goto out_err;
	}

	if (data[IFLA_IPOIB_UMCAST]) {
		umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]);
		ipoib_set_umcast(dev, umcast);
	}

out_err:
	return ret;
}

static int ipoib_new_child_link(struct net *src_net, struct net_device *dev,
			       struct nlattr *tb[], struct nlattr *data[])
{
	struct net_device *pdev;
	struct ipoib_dev_priv *ppriv;
	u16 child_pkey;
	int err;

	if (!tb[IFLA_LINK])
		return -EINVAL;

	pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
	if (!pdev)
		return -ENODEV;

	ppriv = netdev_priv(pdev);

	if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) {
		ipoib_warn(ppriv, "child creation disallowed for child devices\n");
		return -EINVAL;
	}

	if (!data || !data[IFLA_IPOIB_PKEY]) {
		ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n");
		child_pkey  = ppriv->pkey;
	} else
		child_pkey  = nla_get_u16(data[IFLA_IPOIB_PKEY]);

	if (child_pkey == 0 || child_pkey == 0x8000)
		return -EINVAL;

	/*
	 * Set the full membership bit, so that we join the right
	 * broadcast group, etc.
	 */
	child_pkey |= 0x8000;

	err = __ipoib_vlan_add(ppriv, netdev_priv(dev), child_pkey, IPOIB_RTNL_CHILD);

	if (!err && data)
		err = ipoib_changelink(dev, tb, data);
	return err;
}

static void ipoib_unregister_child_dev(struct net_device *dev, struct list_head *head)
{
	struct ipoib_dev_priv *priv, *ppriv;

	priv = netdev_priv(dev);
	ppriv = netdev_priv(priv->parent);

	down_write(&ppriv->vlan_rwsem);
	unregister_netdevice_queue(dev, head);
	list_del(&priv->list);
	up_write(&ppriv->vlan_rwsem);
}

static size_t ipoib_get_size(const struct net_device *dev)
{
	return nla_total_size(2) +	/* IFLA_IPOIB_PKEY   */
		nla_total_size(2) +	/* IFLA_IPOIB_MODE   */
		nla_total_size(2);	/* IFLA_IPOIB_UMCAST */
}

static struct rtnl_link_ops ipoib_link_ops __read_mostly = {
	.kind		= "ipoib",
	.maxtype	= IFLA_IPOIB_MAX,
	.policy		= ipoib_policy,
	.priv_size	= sizeof(struct ipoib_dev_priv),
	.setup		= ipoib_setup,
	.newlink	= ipoib_new_child_link,
	.changelink	= ipoib_changelink,
	.dellink	= ipoib_unregister_child_dev,
	.get_size	= ipoib_get_size,
	.fill_info	= ipoib_fill_info,
};

int __init ipoib_netlink_init(void)
{
	return rtnl_link_register(&ipoib_link_ops);
}

void __exit ipoib_netlink_fini(void)
{
	rtnl_link_unregister(&ipoib_link_ops);
}

MODULE_ALIAS_RTNL_LINK("ipoib");
Commit	Line	Data
9baa0b03 OG	1	/*
	2	* Copyright (c) 2012 Mellanox Technologies. - 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/netdevice.h>
	34	#include <linux/module.h>
	35	#include <net/rtnetlink.h>
	36	#include "ipoib.h"
	37
	38	static const struct nla_policy ipoib_policy[IFLA_IPOIB_MAX + 1] = {
	39	[IFLA_IPOIB_PKEY] = { .type = NLA_U16 },
862096a8 OG	40	[IFLA_IPOIB_MODE] = { .type = NLA_U16 },
862096a8 OG	41	[IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },
9baa0b03 OG	42	};
9baa0b03 OG	43
862096a8 OG	44	static int ipoib_fill_info(struct sk_buff skb, const struct net_device dev)
	45	{
	46	struct ipoib_dev_priv *priv = netdev_priv(dev);
	47	u16 val;
	48
	49	if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey))
	50	goto nla_put_failure;
	51
	52	val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
	53	if (nla_put_u16(skb, IFLA_IPOIB_MODE, val))
	54	goto nla_put_failure;
	55
	56	val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags);
	57	if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val))
	58	goto nla_put_failure;
	59
	60	return 0;
	61
	62	nla_put_failure:
	63	return -EMSGSIZE;
	64	}
	65
	66	static int ipoib_changelink(struct net_device *dev,
	67	struct nlattr tb[], struct nlattr data[])
	68	{
	69	u16 mode, umcast;
	70	int ret = 0;
	71
	72	if (data[IFLA_IPOIB_MODE]) {
	73	mode = nla_get_u16(data[IFLA_IPOIB_MODE]);
	74	if (mode == IPOIB_MODE_DATAGRAM)
	75	ret = ipoib_set_mode(dev, "datagram\n");
	76	else if (mode == IPOIB_MODE_CONNECTED)
	77	ret = ipoib_set_mode(dev, "connected\n");
	78	else
	79	ret = -EINVAL;
	80
	81	if (ret < 0)
	82	goto out_err;
	83	}
	84
	85	if (data[IFLA_IPOIB_UMCAST]) {
	86	umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]);
	87	ipoib_set_umcast(dev, umcast);
	88	}
	89
	90	out_err:
	91	return ret;
	92	}
	93
9baa0b03 OG	94	static int ipoib_new_child_link(struct net src_net, struct net_device dev,
	95	struct nlattr tb[], struct nlattr data[])
	96	{
	97	struct net_device *pdev;
	98	struct ipoib_dev_priv *ppriv;
	99	u16 child_pkey;
	100	int err;
	101
	102	if (!tb[IFLA_LINK])
	103	return -EINVAL;
	104
	105	pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
	106	if (!pdev)
	107	return -ENODEV;
	108
	109	ppriv = netdev_priv(pdev);
	110
	111	if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) {
	112	ipoib_warn(ppriv, "child creation disallowed for child devices\n");
	113	return -EINVAL;
	114	}
	115
	116	if (!data \|\| !data[IFLA_IPOIB_PKEY]) {
	117	ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n");
	118	child_pkey = ppriv->pkey;
	119	} else
	120	child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]);
	121
3d790a4c OG	122	if (child_pkey == 0 \|\| child_pkey == 0x8000)
	123	return -EINVAL;
	124
	125	/*
	126	* Set the full membership bit, so that we join the right
	127	* broadcast group, etc.
	128	*/
	129	child_pkey \|= 0x8000;
	130
9baa0b03 OG	131	err = __ipoib_vlan_add(ppriv, netdev_priv(dev), child_pkey, IPOIB_RTNL_CHILD);
9baa0b03 OG	132
862096a8 OG	133	if (!err && data)
862096a8 OG	134	err = ipoib_changelink(dev, tb, data);
9baa0b03 OG	135	return err;
	136	}
	137
	138	static void ipoib_unregister_child_dev(struct net_device dev, struct list_head head)
	139	{
	140	struct ipoib_dev_priv priv, ppriv;
	141
	142	priv = netdev_priv(dev);
	143	ppriv = netdev_priv(priv->parent);
	144
f47944cc	145	down_write(&ppriv->vlan_rwsem);
9baa0b03 OG	146	unregister_netdevice_queue(dev, head);
9baa0b03 OG	147	list_del(&priv->list);
f47944cc	148	up_write(&ppriv->vlan_rwsem);
9baa0b03 OG	149	}
	150
	151	static size_t ipoib_get_size(const struct net_device *dev)
	152	{
862096a8 OG	153	return nla_total_size(2) + /* IFLA_IPOIB_PKEY */
	154	nla_total_size(2) + /* IFLA_IPOIB_MODE */
	155	nla_total_size(2); /* IFLA_IPOIB_UMCAST */
9baa0b03 OG	156	}
	157
	158	static struct rtnl_link_ops ipoib_link_ops __read_mostly = {
	159	.kind = "ipoib",
	160	.maxtype = IFLA_IPOIB_MAX,
	161	.policy = ipoib_policy,
	162	.priv_size = sizeof(struct ipoib_dev_priv),
	163	.setup = ipoib_setup,
	164	.newlink = ipoib_new_child_link,
862096a8	165	.changelink = ipoib_changelink,
9baa0b03 OG	166	.dellink = ipoib_unregister_child_dev,
9baa0b03 OG	167	.get_size = ipoib_get_size,
862096a8	168	.fill_info = ipoib_fill_info,
9baa0b03 OG	169	};
	170
	171	int __init ipoib_netlink_init(void)
	172	{
	173	return rtnl_link_register(&ipoib_link_ops);
	174	}
	175
	176	void __exit ipoib_netlink_fini(void)
	177	{
	178	rtnl_link_unregister(&ipoib_link_ops);
	179	}
	180
	181	MODULE_ALIAS_RTNL_LINK("ipoib");