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 "netlink.h"
8#include "user.h"
9
10static const struct nla_policy dsa_policy[IFLA_DSA_MAX + 1] = {
11 [IFLA_DSA_CONDUIT] = { .type = NLA_U32 },
12};
13
14static int dsa_changelink(struct net_device *dev, struct nlattr *tb[],
15 struct nlattr *data[],
16 struct netlink_ext_ack *extack)
17{
18 int err;
19
20 if (!data)
21 return 0;
22
23 if (data[IFLA_DSA_CONDUIT]) {
24 u32 ifindex = nla_get_u32(nla: data[IFLA_DSA_CONDUIT]);
25 struct net_device *conduit;
26
27 conduit = __dev_get_by_index(net: dev_net(dev), ifindex);
28 if (!conduit)
29 return -EINVAL;
30
31 err = dsa_user_change_conduit(dev, conduit, extack);
32 if (err)
33 return err;
34 }
35
36 return 0;
37}
38
39static size_t dsa_get_size(const struct net_device *dev)
40{
41 return nla_total_size(payload: sizeof(u32)) + /* IFLA_DSA_CONDUIT */
42 0;
43}
44
45static int dsa_fill_info(struct sk_buff *skb, const struct net_device *dev)
46{
47 struct net_device *conduit = dsa_user_to_conduit(dev);
48
49 if (nla_put_u32(skb, attrtype: IFLA_DSA_CONDUIT, value: conduit->ifindex))
50 return -EMSGSIZE;
51
52 return 0;
53}
54
55struct rtnl_link_ops dsa_link_ops __read_mostly = {
56 .kind = "dsa",
57 .priv_size = sizeof(struct dsa_port),
58 .maxtype = IFLA_DSA_MAX,
59 .policy = dsa_policy,
60 .changelink = dsa_changelink,
61 .get_size = dsa_get_size,
62 .fill_info = dsa_fill_info,
63 .netns_refund = true,
64};
65

source code of linux/net/dsa/netlink.c