1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include "netlink.h"
4 #include "common.h"
5
6 struct linkinfo_req_info {
7 struct ethnl_req_info base;
8 };
9
10 struct 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
19 const struct nla_policy ethnl_linkinfo_get_policy[] = {
20 [ETHTOOL_A_LINKINFO_HEADER] =
21 NLA_POLICY_NESTED(ethnl_header_policy),
22 };
23
linkinfo_prepare_data(const struct ethnl_req_info * req_base,struct ethnl_reply_data * reply_base,struct genl_info * info)24 static int linkinfo_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 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, &data->ksettings);
38 if (ret < 0 && info)
39 GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
40 ethnl_ops_complete(dev);
41
42 return ret;
43 }
44
linkinfo_reply_size(const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)45 static 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(sizeof(u8)) /* LINKINFO_PORT */
49 + nla_total_size(sizeof(u8)) /* LINKINFO_PHYADDR */
50 + nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX */
51 + nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX_CTRL */
52 + nla_total_size(sizeof(u8)) /* LINKINFO_TRANSCEIVER */
53 + 0;
54 }
55
linkinfo_fill_reply(struct sk_buff * skb,const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)56 static 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, ETHTOOL_A_LINKINFO_PORT, data->lsettings->port) ||
63 nla_put_u8(skb, ETHTOOL_A_LINKINFO_PHYADDR,
64 data->lsettings->phy_address) ||
65 nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX,
66 data->lsettings->eth_tp_mdix) ||
67 nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX_CTRL,
68 data->lsettings->eth_tp_mdix_ctrl) ||
69 nla_put_u8(skb, ETHTOOL_A_LINKINFO_TRANSCEIVER,
70 data->lsettings->transceiver))
71 return -EMSGSIZE;
72
73 return 0;
74 }
75
76 const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
77 .request_cmd = ETHTOOL_MSG_LINKINFO_GET,
78 .reply_cmd = ETHTOOL_MSG_LINKINFO_GET_REPLY,
79 .hdr_attr = ETHTOOL_A_LINKINFO_HEADER,
80 .req_info_size = sizeof(struct linkinfo_req_info),
81 .reply_data_size = sizeof(struct linkinfo_reply_data),
82
83 .prepare_data = linkinfo_prepare_data,
84 .reply_size = linkinfo_reply_size,
85 .fill_reply = linkinfo_fill_reply,
86 };
87
88 /* LINKINFO_SET */
89
90 const struct nla_policy ethnl_linkinfo_set_policy[] = {
91 [ETHTOOL_A_LINKINFO_HEADER] =
92 NLA_POLICY_NESTED(ethnl_header_policy),
93 [ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_U8 },
94 [ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_U8 },
95 [ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_U8 },
96 };
97
ethnl_set_linkinfo(struct sk_buff * skb,struct genl_info * info)98 int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info)
99 {
100 struct ethtool_link_ksettings ksettings = {};
101 struct ethtool_link_settings *lsettings;
102 struct ethnl_req_info req_info = {};
103 struct nlattr **tb = info->attrs;
104 struct net_device *dev;
105 bool mod = false;
106 int ret;
107
108 ret = ethnl_parse_header_dev_get(&req_info,
109 tb[ETHTOOL_A_LINKINFO_HEADER],
110 genl_info_net(info), info->extack,
111 true);
112 if (ret < 0)
113 return ret;
114 dev = req_info.dev;
115 ret = -EOPNOTSUPP;
116 if (!dev->ethtool_ops->get_link_ksettings ||
117 !dev->ethtool_ops->set_link_ksettings)
118 goto out_dev;
119
120 rtnl_lock();
121 ret = ethnl_ops_begin(dev);
122 if (ret < 0)
123 goto out_rtnl;
124
125 ret = __ethtool_get_link_ksettings(dev, &ksettings);
126 if (ret < 0) {
127 GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
128 goto out_ops;
129 }
130 lsettings = &ksettings.base;
131
132 ethnl_update_u8(&lsettings->port, tb[ETHTOOL_A_LINKINFO_PORT], &mod);
133 ethnl_update_u8(&lsettings->phy_address, tb[ETHTOOL_A_LINKINFO_PHYADDR],
134 &mod);
135 ethnl_update_u8(&lsettings->eth_tp_mdix_ctrl,
136 tb[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL], &mod);
137 ret = 0;
138 if (!mod)
139 goto out_ops;
140
141 ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
142 if (ret < 0)
143 GENL_SET_ERR_MSG(info, "link settings update failed");
144 else
145 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
146
147 out_ops:
148 ethnl_ops_complete(dev);
149 out_rtnl:
150 rtnl_unlock();
151 out_dev:
152 dev_put(dev);
153 return ret;
154 }
155