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 | |
44 | static unsigned int ipoib_get_max_num_queues(void) |
45 | { |
46 | return min_t(unsigned int, num_possible_cpus(), 128); |
47 | } |
48 | |
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, 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 | |
67 | nla_put_failure: |
68 | return -EMSGSIZE; |
69 | } |
70 | |
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(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 | |
96 | out_err: |
97 | return ret; |
98 | } |
99 | |
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(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 | |
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 | |
161 | static 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 | |
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 | |
184 | struct rtnl_link_ops *ipoib_get_link_ops(void) |
185 | { |
186 | return &ipoib_link_ops; |
187 | } |
188 | |
189 | int __init ipoib_netlink_init(void) |
190 | { |
191 | return rtnl_link_register(ops: &ipoib_link_ops); |
192 | } |
193 | |
194 | void __exit ipoib_netlink_fini(void) |
195 | { |
196 | rtnl_link_unregister(ops: &ipoib_link_ops); |
197 | } |
198 | |
199 | MODULE_ALIAS_RTNL_LINK("ipoib" ); |
200 | |