1// SPDX-License-Identifier: GPL-2.0-only
2
3#include "netlink.h"
4#include "common.h"
5
6struct linkinfo_req_info {
7 struct ethnl_req_info base;
8};
9
10struct linkinfo_reply_data {
11 struct ethnl_reply_data base;
12 struct ethtool_link_ksettings ksettings;
13 struct ethtool_link_settings *lsettings;
14};
15
16#define LINKINFO_REPDATA(__reply_base) \
17 container_of(__reply_base, struct linkinfo_reply_data, base)
18
19const struct nla_policy ethnl_linkinfo_get_policy[] = {
20 [ETHTOOL_A_LINKINFO_HEADER] =
21 NLA_POLICY_NESTED(ethnl_header_policy),
22};
23
24static int linkinfo_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 const struct genl_info *info)
27{
28 struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base);
29 struct net_device *dev = reply_base->dev;
30 int ret;
31
32 data->lsettings = &data->ksettings.base;
33
34 ret = ethnl_ops_begin(dev);
35 if (ret < 0)
36 return ret;
37 ret = __ethtool_get_link_ksettings(dev, link_ksettings: &data->ksettings);
38 if (ret < 0)
39 GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
40 ethnl_ops_complete(dev);
41
42 return ret;
43}
44
45static int linkinfo_reply_size(const struct ethnl_req_info *req_base,
46 const struct ethnl_reply_data *reply_base)
47{
48 return nla_total_size(payload: sizeof(u8)) /* LINKINFO_PORT */
49 + nla_total_size(payload: sizeof(u8)) /* LINKINFO_PHYADDR */
50 + nla_total_size(payload: sizeof(u8)) /* LINKINFO_TP_MDIX */
51 + nla_total_size(payload: sizeof(u8)) /* LINKINFO_TP_MDIX_CTRL */
52 + nla_total_size(payload: sizeof(u8)) /* LINKINFO_TRANSCEIVER */
53 + 0;
54}
55
56static int linkinfo_fill_reply(struct sk_buff *skb,
57 const struct ethnl_req_info *req_base,
58 const struct ethnl_reply_data *reply_base)
59{
60 const struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base);
61
62 if (nla_put_u8(skb, attrtype: ETHTOOL_A_LINKINFO_PORT, value: data->lsettings->port) ||
63 nla_put_u8(skb, attrtype: ETHTOOL_A_LINKINFO_PHYADDR,
64 value: data->lsettings->phy_address) ||
65 nla_put_u8(skb, attrtype: ETHTOOL_A_LINKINFO_TP_MDIX,
66 value: data->lsettings->eth_tp_mdix) ||
67 nla_put_u8(skb, attrtype: ETHTOOL_A_LINKINFO_TP_MDIX_CTRL,
68 value: data->lsettings->eth_tp_mdix_ctrl) ||
69 nla_put_u8(skb, attrtype: ETHTOOL_A_LINKINFO_TRANSCEIVER,
70 value: data->lsettings->transceiver))
71 return -EMSGSIZE;
72
73 return 0;
74}
75
76/* LINKINFO_SET */
77
78const struct nla_policy ethnl_linkinfo_set_policy[] = {
79 [ETHTOOL_A_LINKINFO_HEADER] =
80 NLA_POLICY_NESTED(ethnl_header_policy),
81 [ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_U8 },
82 [ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_U8 },
83 [ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_U8 },
84};
85
86static int
87ethnl_set_linkinfo_validate(struct ethnl_req_info *req_info,
88 struct genl_info *info)
89{
90 const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
91
92 if (!ops->get_link_ksettings || !ops->set_link_ksettings)
93 return -EOPNOTSUPP;
94 return 1;
95}
96
97static int
98ethnl_set_linkinfo(struct ethnl_req_info *req_info, struct genl_info *info)
99{
100 struct ethtool_link_ksettings ksettings = {};
101 struct ethtool_link_settings *lsettings;
102 struct net_device *dev = req_info->dev;
103 struct nlattr **tb = info->attrs;
104 bool mod = false;
105 int ret;
106
107 ret = __ethtool_get_link_ksettings(dev, link_ksettings: &ksettings);
108 if (ret < 0) {
109 GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
110 return ret;
111 }
112 lsettings = &ksettings.base;
113
114 ethnl_update_u8(dst: &lsettings->port, attr: tb[ETHTOOL_A_LINKINFO_PORT], mod: &mod);
115 ethnl_update_u8(dst: &lsettings->phy_address, attr: tb[ETHTOOL_A_LINKINFO_PHYADDR],
116 mod: &mod);
117 ethnl_update_u8(dst: &lsettings->eth_tp_mdix_ctrl,
118 attr: tb[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL], mod: &mod);
119 if (!mod)
120 return 0;
121
122 ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
123 if (ret < 0) {
124 GENL_SET_ERR_MSG(info, "link settings update failed");
125 return ret;
126 }
127
128 return 1;
129}
130
131const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
132 .request_cmd = ETHTOOL_MSG_LINKINFO_GET,
133 .reply_cmd = ETHTOOL_MSG_LINKINFO_GET_REPLY,
134 .hdr_attr = ETHTOOL_A_LINKINFO_HEADER,
135 .req_info_size = sizeof(struct linkinfo_req_info),
136 .reply_data_size = sizeof(struct linkinfo_reply_data),
137
138 .prepare_data = linkinfo_prepare_data,
139 .reply_size = linkinfo_reply_size,
140 .fill_reply = linkinfo_fill_reply,
141
142 .set_validate = ethnl_set_linkinfo_validate,
143 .set = ethnl_set_linkinfo,
144 .set_ntf_cmd = ETHTOOL_MSG_LINKINFO_NTF,
145};
146

source code of linux/net/ethtool/linkinfo.c