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
38static 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
44static unsigned int ipoib_get_max_num_queues(void)
45{
46 return min_t(unsigned int, num_possible_cpus(), 128);
47}
48
49static 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, attrtype: IFLA_IPOIB_PKEY, value: priv->pkey))
55 goto nla_put_failure;
56
57 val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
58 if (nla_put_u16(skb, attrtype: IFLA_IPOIB_MODE, value: val))
59 goto nla_put_failure;
60
61 val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags);
62 if (nla_put_u16(skb, attrtype: IFLA_IPOIB_UMCAST, value: val))
63 goto nla_put_failure;
64
65 return 0;
66
67nla_put_failure:
68 return -EMSGSIZE;
69}
70
71static 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(nla: data[IFLA_IPOIB_MODE]);
80 if (mode == IPOIB_MODE_DATAGRAM)
81 ret = ipoib_set_mode(dev, buf: "datagram\n");
82 else if (mode == IPOIB_MODE_CONNECTED)
83 ret = ipoib_set_mode(dev, buf: "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(nla: data[IFLA_IPOIB_UMCAST]);
93 ipoib_set_umcast(ndev: dev, umcast_val: umcast);
94 }
95
96out_err:
97 return ret;
98}
99
100static 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(net: src_net, ifindex: nla_get_u32(nla: tb[IFLA_LINK]));
113 if (!pdev || pdev->type != ARPHRD_INFINIBAND)
114 return -ENODEV;
115
116 ppriv = ipoib_priv(dev: 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(nla: data[IFLA_IPOIB_PKEY]);
128
129 err = ipoib_intf_init(hca: ppriv->ca, port: ppriv->port, format: 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, priv: ipoib_priv(dev),
136 pkey: child_pkey, child_type: 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
151static 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
161static size_t ipoib_get_size(const struct net_device *dev)
162{
163 return nla_total_size(payload: 2) + /* IFLA_IPOIB_PKEY */
164 nla_total_size(payload: 2) + /* IFLA_IPOIB_MODE */
165 nla_total_size(payload: 2); /* IFLA_IPOIB_UMCAST */
166}
167
168static 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
184struct rtnl_link_ops *ipoib_get_link_ops(void)
185{
186 return &ipoib_link_ops;
187}
188
189int __init ipoib_netlink_init(void)
190{
191 return rtnl_link_register(ops: &ipoib_link_ops);
192}
193
194void __exit ipoib_netlink_fini(void)
195{
196 rtnl_link_unregister(ops: &ipoib_link_ops);
197}
198
199MODULE_ALIAS_RTNL_LINK("ipoib");
200

source code of linux/drivers/infiniband/ulp/ipoib/ipoib_netlink.c