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 <linux/module.h>
36 #include <net/rtnetlink.h>
37 #include "ipoib.h"
38
39 static const struct nla_policy ipoib_policy[IFLA_IPOIB_MAX + 1] = {
40 [IFLA_IPOIB_PKEY] = { .type = NLA_U16 },
41 [IFLA_IPOIB_MODE] = { .type = NLA_U16 },
42 [IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },
43 };
44
ipoib_fill_info(struct sk_buff * skb,const struct net_device * dev)45 static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev)
46 {
47 struct ipoib_dev_priv *priv = ipoib_priv(dev);
48 u16 val;
49
50 if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey))
51 goto nla_put_failure;
52
53 val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
54 if (nla_put_u16(skb, IFLA_IPOIB_MODE, val))
55 goto nla_put_failure;
56
57 val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags);
58 if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val))
59 goto nla_put_failure;
60
61 return 0;
62
63 nla_put_failure:
64 return -EMSGSIZE;
65 }
66
ipoib_changelink(struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)67 static int ipoib_changelink(struct net_device *dev, struct nlattr *tb[],
68 struct nlattr *data[],
69 struct netlink_ext_ack *extack)
70 {
71 u16 mode, umcast;
72 int ret = 0;
73
74 if (data[IFLA_IPOIB_MODE]) {
75 mode = nla_get_u16(data[IFLA_IPOIB_MODE]);
76 if (mode == IPOIB_MODE_DATAGRAM)
77 ret = ipoib_set_mode(dev, "datagram\n");
78 else if (mode == IPOIB_MODE_CONNECTED)
79 ret = ipoib_set_mode(dev, "connected\n");
80 else
81 ret = -EINVAL;
82
83 if (ret < 0)
84 goto out_err;
85 }
86
87 if (data[IFLA_IPOIB_UMCAST]) {
88 umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]);
89 ipoib_set_umcast(dev, umcast);
90 }
91
92 out_err:
93 return ret;
94 }
95
ipoib_new_child_link(struct net * src_net,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)96 static int ipoib_new_child_link(struct net *src_net, struct net_device *dev,
97 struct nlattr *tb[], struct nlattr *data[],
98 struct netlink_ext_ack *extack)
99 {
100 struct net_device *pdev;
101 struct ipoib_dev_priv *ppriv;
102 u16 child_pkey;
103 int err;
104
105 if (!tb[IFLA_LINK])
106 return -EINVAL;
107
108 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
109 if (!pdev || pdev->type != ARPHRD_INFINIBAND)
110 return -ENODEV;
111
112 ppriv = ipoib_priv(pdev);
113
114 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) {
115 ipoib_warn(ppriv, "child creation disallowed for child devices\n");
116 return -EINVAL;
117 }
118
119 if (!data || !data[IFLA_IPOIB_PKEY]) {
120 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n");
121 child_pkey = ppriv->pkey;
122 } else
123 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]);
124
125 err = __ipoib_vlan_add(ppriv, ipoib_priv(dev),
126 child_pkey, IPOIB_RTNL_CHILD);
127
128 if (!err && data)
129 err = ipoib_changelink(dev, tb, data, extack);
130 return err;
131 }
132
ipoib_get_size(const struct net_device * dev)133 static size_t ipoib_get_size(const struct net_device *dev)
134 {
135 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */
136 nla_total_size(2) + /* IFLA_IPOIB_MODE */
137 nla_total_size(2); /* IFLA_IPOIB_UMCAST */
138 }
139
140 static struct rtnl_link_ops ipoib_link_ops __read_mostly = {
141 .kind = "ipoib",
142 .maxtype = IFLA_IPOIB_MAX,
143 .policy = ipoib_policy,
144 .priv_size = sizeof(struct ipoib_dev_priv),
145 .setup = ipoib_setup_common,
146 .newlink = ipoib_new_child_link,
147 .changelink = ipoib_changelink,
148 .get_size = ipoib_get_size,
149 .fill_info = ipoib_fill_info,
150 };
151
ipoib_netlink_init(void)152 int __init ipoib_netlink_init(void)
153 {
154 return rtnl_link_register(&ipoib_link_ops);
155 }
156
ipoib_netlink_fini(void)157 void __exit ipoib_netlink_fini(void)
158 {
159 rtnl_link_unregister(&ipoib_link_ops);
160 }
161
162 MODULE_ALIAS_RTNL_LINK("ipoib");
163
