aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/ulp/ipoib/ipoib_netlink.c
blob: c29b5c8388331458bb2a2caf85580d76031f1dcb (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/*
 * 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");