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_get_max_num_queues(void)44 static unsigned int ipoib_get_max_num_queues(void)
45 {
46 return min_t(unsigned int, num_possible_cpus(), 128);
47 }
48
ipoib_fill_info(struct sk_buff * skb,const struct net_device * dev)49 static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev)
50 {
51 struct ipoib_dev_priv *priv = ipoib_priv(dev);
52 u16 val;
53
54 if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey))
55 goto nla_put_failure;
56
57 val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
58 if (nla_put_u16(skb, IFLA_IPOIB_MODE, val))
59 goto nla_put_failure;
60
61 val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags);
62 if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val))
63 goto nla_put_failure;
64
65 return 0;
66
67 nla_put_failure:
68 return -EMSGSIZE;
69 }
70
ipoib_changelink(struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)71 static int ipoib_changelink(struct net_device *dev, struct nlattr *tb[],
72 struct nlattr *data[],
73 struct netlink_ext_ack *extack)
74 {
75 u16 mode, umcast;
76 int ret = 0;
77
78 if (data[IFLA_IPOIB_MODE]) {
79 mode = nla_get_u16(data[IFLA_IPOIB_MODE]);
80 if (mode == IPOIB_MODE_DATAGRAM)
81 ret = ipoib_set_mode(dev, "datagram\n");
82 else if (mode == IPOIB_MODE_CONNECTED)
83 ret = ipoib_set_mode(dev, "connected\n");
84 else
85 ret = -EINVAL;
86
87 if (ret < 0)
88 goto out_err;
89 }
90
91 if (data[IFLA_IPOIB_UMCAST]) {
92 umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]);
93 ipoib_set_umcast(dev, umcast);
94 }
95
96 out_err:
97 return ret;
98 }
99
ipoib_new_child_link(struct net * src_net,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)100 static int ipoib_new_child_link(struct net *src_net, struct net_device *dev,
101 struct nlattr *tb[], struct nlattr *data[],
102 struct netlink_ext_ack *extack)
103 {
104 struct net_device *pdev;
105 struct ipoib_dev_priv *ppriv;
106 u16 child_pkey;
107 int err;
108
109 if (!tb[IFLA_LINK])
110 return -EINVAL;
111
112 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
113 if (!pdev || pdev->type != ARPHRD_INFINIBAND)
114 return -ENODEV;
115
116 ppriv = ipoib_priv(pdev);
117
118 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) {
119 ipoib_warn(ppriv, "child creation disallowed for child devices\n");
120 return -EINVAL;
121 }
122
123 if (!data || !data[IFLA_IPOIB_PKEY]) {
124 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n");
125 child_pkey = ppriv->pkey;
126 } else
127 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]);
128
129 err = ipoib_intf_init(ppriv->ca, ppriv->port, dev->name, dev);
130 if (err) {
131 ipoib_warn(ppriv, "failed to initialize pkey device\n");
132 return err;
133 }
134
135 err = __ipoib_vlan_add(ppriv, ipoib_priv(dev),
136 child_pkey, IPOIB_RTNL_CHILD);
137 if (err)
138 return err;
139
140 if (data) {
141 err = ipoib_changelink(dev, tb, data, extack);
142 if (err) {
143 unregister_netdevice(dev);
144 return err;
145 }
146 }
147
148 return 0;
149 }
150
ipoib_del_child_link(struct net_device * dev,struct list_head * head)151 static void ipoib_del_child_link(struct net_device *dev, struct list_head *head)
152 {
153 struct ipoib_dev_priv *priv = ipoib_priv(dev);
154
155 if (!priv->parent)
156 return;
157
158 unregister_netdevice_queue(dev, head);
159 }
160
ipoib_get_size(const struct net_device * dev)161 static size_t ipoib_get_size(const struct net_device *dev)
162 {
163 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */
164 nla_total_size(2) + /* IFLA_IPOIB_MODE */
165 nla_total_size(2); /* IFLA_IPOIB_UMCAST */
166 }
167
168 static struct rtnl_link_ops ipoib_link_ops __read_mostly = {
169 .kind = "ipoib",
170 .netns_refund = true,
171 .maxtype = IFLA_IPOIB_MAX,
172 .policy = ipoib_policy,
173 .priv_size = sizeof(struct ipoib_dev_priv),
174 .setup = ipoib_setup_common,
175 .newlink = ipoib_new_child_link,
176 .dellink = ipoib_del_child_link,
177 .changelink = ipoib_changelink,
178 .get_size = ipoib_get_size,
179 .fill_info = ipoib_fill_info,
180 .get_num_rx_queues = ipoib_get_max_num_queues,
181 .get_num_tx_queues = ipoib_get_max_num_queues,
182 };
183
ipoib_get_link_ops(void)184 struct rtnl_link_ops *ipoib_get_link_ops(void)
185 {
186 return &ipoib_link_ops;
187 }
188
ipoib_netlink_init(void)189 int __init ipoib_netlink_init(void)
190 {
191 return rtnl_link_register(&ipoib_link_ops);
192 }
193
ipoib_netlink_fini(void)194 void __exit ipoib_netlink_fini(void)
195 {
196 rtnl_link_unregister(&ipoib_link_ops);
197 }
198
199 MODULE_ALIAS_RTNL_LINK("ipoib");
200