1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright 2022 NXP
3 */
4 #include <linux/netdevice.h>
5 #include <net/rtnetlink.h>
6
7 #include "dsa_priv.h"
8
9 static const struct nla_policy dsa_policy[IFLA_DSA_MAX + 1] = {
10 [IFLA_DSA_MASTER] = { .type = NLA_U32 },
11 };
12
dsa_changelink(struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)13 static int dsa_changelink(struct net_device *dev, struct nlattr *tb[],
14 struct nlattr *data[],
15 struct netlink_ext_ack *extack)
16 {
17 int err;
18
19 if (!data)
20 return 0;
21
22 if (data[IFLA_DSA_MASTER]) {
23 u32 ifindex = nla_get_u32(data[IFLA_DSA_MASTER]);
24 struct net_device *master;
25
26 master = __dev_get_by_index(dev_net(dev), ifindex);
27 if (!master)
28 return -EINVAL;
29
30 err = dsa_slave_change_master(dev, master, extack);
31 if (err)
32 return err;
33 }
34
35 return 0;
36 }
37
dsa_get_size(const struct net_device * dev)38 static size_t dsa_get_size(const struct net_device *dev)
39 {
40 return nla_total_size(sizeof(u32)) + /* IFLA_DSA_MASTER */
41 0;
42 }
43
dsa_fill_info(struct sk_buff * skb,const struct net_device * dev)44 static int dsa_fill_info(struct sk_buff *skb, const struct net_device *dev)
45 {
46 struct net_device *master = dsa_slave_to_master(dev);
47
48 if (nla_put_u32(skb, IFLA_DSA_MASTER, master->ifindex))
49 return -EMSGSIZE;
50
51 return 0;
52 }
53
54 struct rtnl_link_ops dsa_link_ops __read_mostly = {
55 .kind = "dsa",
56 .priv_size = sizeof(struct dsa_port),
57 .maxtype = IFLA_DSA_MAX,
58 .policy = dsa_policy,
59 .changelink = dsa_changelink,
60 .get_size = dsa_get_size,
61 .fill_info = dsa_fill_info,
62 .netns_refund = true,
63 };
64
