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/if_arp.h> /* For ARPHRD_xxx */
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 },
40 [IFLA_IPOIB_MODE] = { .type = NLA_U16 },
41 [IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },
42 };
43
ipoib_fill_info(struct sk_buff * skb,const struct net_device * dev)44 static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev)
45 {
46 struct ipoib_dev_priv *priv = ipoib_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
ipoib_changelink(struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)66 static int ipoib_changelink(struct net_device *dev, struct nlattr *tb[],
67 struct nlattr *data[],
68 struct netlink_ext_ack *extack)
69 {
70 u16 mode, umcast;
71 int ret = 0;
72
73 if (data[IFLA_IPOIB_MODE]) {
74 mode = nla_get_u16(data[IFLA_IPOIB_MODE]);
75 if (mode == IPOIB_MODE_DATAGRAM)
76 ret = ipoib_set_mode(dev, "datagram\n");
77 else if (mode == IPOIB_MODE_CONNECTED)
78 ret = ipoib_set_mode(dev, "connected\n");
79 else
80 ret = -EINVAL;
81
82 if (ret < 0)
83 goto out_err;
84 }
85
86 if (data[IFLA_IPOIB_UMCAST]) {
87 umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]);
88 ipoib_set_umcast(dev, umcast);
89 }
90
91 out_err:
92 return ret;
93 }
94
ipoib_new_child_link(struct net * src_net,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)95 static int ipoib_new_child_link(struct net *src_net, struct net_device *dev,
96 struct nlattr *tb[], struct nlattr *data[],
97 struct netlink_ext_ack *extack)
98 {
99 struct net_device *pdev;
100 struct ipoib_dev_priv *ppriv;
101 u16 child_pkey;
102 int err;
103
104 if (!tb[IFLA_LINK])
105 return -EINVAL;
106
107 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
108 if (!pdev || pdev->type != ARPHRD_INFINIBAND)
109 return -ENODEV;
110
111 ppriv = ipoib_priv(pdev);
112
113 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) {
114 ipoib_warn(ppriv, "child creation disallowed for child devices\n");
115 return -EINVAL;
116 }
117
118 if (!data || !data[IFLA_IPOIB_PKEY]) {
119 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n");
120 child_pkey = ppriv->pkey;
121 } else
122 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]);
123
124 err = ipoib_intf_init(ppriv->ca, ppriv->port, dev->name, dev);
125 if (err) {
126 ipoib_warn(ppriv, "failed to initialize pkey device\n");
127 return err;
128 }
129
130 err = __ipoib_vlan_add(ppriv, ipoib_priv(dev),
131 child_pkey, IPOIB_RTNL_CHILD);
132 if (err)
133 return err;
134
135 if (data) {
136 err = ipoib_changelink(dev, tb, data, extack);
137 if (err) {
138 unregister_netdevice(dev);
139 return err;
140 }
141 }
142
143 return 0;
144 }
145
ipoib_del_child_link(struct net_device * dev,struct list_head * head)146 static void ipoib_del_child_link(struct net_device *dev, struct list_head *head)
147 {
148 struct ipoib_dev_priv *priv = ipoib_priv(dev);
149
150 if (!priv->parent)
151 return;
152
153 unregister_netdevice_queue(dev, head);
154 }
155
ipoib_get_size(const struct net_device * dev)156 static size_t ipoib_get_size(const struct net_device *dev)
157 {
158 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */
159 nla_total_size(2) + /* IFLA_IPOIB_MODE */
160 nla_total_size(2); /* IFLA_IPOIB_UMCAST */
161 }
162
163 static struct rtnl_link_ops ipoib_link_ops __read_mostly = {
164 .kind = "ipoib",
165 .netns_refund = true,
166 .maxtype = IFLA_IPOIB_MAX,
167 .policy = ipoib_policy,
168 .priv_size = sizeof(struct ipoib_dev_priv),
169 .setup = ipoib_setup_common,
170 .newlink = ipoib_new_child_link,
171 .dellink = ipoib_del_child_link,
172 .changelink = ipoib_changelink,
173 .get_size = ipoib_get_size,
174 .fill_info = ipoib_fill_info,
175 };
176
ipoib_get_link_ops(void)177 struct rtnl_link_ops *ipoib_get_link_ops(void)
178 {
179 return &ipoib_link_ops;
180 }
181
ipoib_netlink_init(void)182 int __init ipoib_netlink_init(void)
183 {
184 return rtnl_link_register(&ipoib_link_ops);
185 }
186
ipoib_netlink_fini(void)187 void __exit ipoib_netlink_fini(void)
188 {
189 rtnl_link_unregister(&ipoib_link_ops);
190 }
191
192 MODULE_ALIAS_RTNL_LINK("ipoib");
193
