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459e0b81 MK |
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 | ||
ff419afa | 19 | const struct nla_policy ethnl_linkinfo_get_policy[] = { |
329d9c33 JK |
20 | [ETHTOOL_A_LINKINFO_HEADER] = |
21 | NLA_POLICY_NESTED(ethnl_header_policy), | |
459e0b81 MK |
22 | }; |
23 | ||
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 | ||
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 | ||
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, | |
459e0b81 MK |
80 | .req_info_size = sizeof(struct linkinfo_req_info), |
81 | .reply_data_size = sizeof(struct linkinfo_reply_data), | |
459e0b81 MK |
82 | |
83 | .prepare_data = linkinfo_prepare_data, | |
84 | .reply_size = linkinfo_reply_size, | |
85 | .fill_reply = linkinfo_fill_reply, | |
86 | }; | |
a53f3d41 MK |
87 | |
88 | /* LINKINFO_SET */ | |
89 | ||
ff419afa | 90 | const struct nla_policy ethnl_linkinfo_set_policy[] = { |
329d9c33 JK |
91 | [ETHTOOL_A_LINKINFO_HEADER] = |
92 | NLA_POLICY_NESTED(ethnl_header_policy), | |
a53f3d41 MK |
93 | [ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_U8 }, |
94 | [ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_U8 }, | |
a53f3d41 | 95 | [ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_U8 }, |
a53f3d41 MK |
96 | }; |
97 | ||
98 | int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info) | |
99 | { | |
a53f3d41 MK |
100 | struct ethtool_link_ksettings ksettings = {}; |
101 | struct ethtool_link_settings *lsettings; | |
102 | struct ethnl_req_info req_info = {}; | |
5028588b | 103 | struct nlattr **tb = info->attrs; |
a53f3d41 MK |
104 | struct net_device *dev; |
105 | bool mod = false; | |
106 | int ret; | |
107 | ||
98130546 MK |
108 | ret = ethnl_parse_header_dev_get(&req_info, |
109 | tb[ETHTOOL_A_LINKINFO_HEADER], | |
110 | genl_info_net(info), info->extack, | |
111 | true); | |
a53f3d41 MK |
112 | if (ret < 0) |
113 | return ret; | |
114 | dev = req_info.dev; | |
2f599ec4 | 115 | ret = -EOPNOTSUPP; |
a53f3d41 MK |
116 | if (!dev->ethtool_ops->get_link_ksettings || |
117 | !dev->ethtool_ops->set_link_ksettings) | |
2f599ec4 | 118 | goto out_dev; |
a53f3d41 MK |
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) { | |
178f67b1 | 127 | GENL_SET_ERR_MSG(info, "failed to retrieve link settings"); |
a53f3d41 MK |
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"); | |
73286734 MK |
144 | else |
145 | ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); | |
a53f3d41 MK |
146 | |
147 | out_ops: | |
148 | ethnl_ops_complete(dev); | |
149 | out_rtnl: | |
150 | rtnl_unlock(); | |
2f599ec4 | 151 | out_dev: |
a53f3d41 MK |
152 | dev_put(dev); |
153 | return ret; | |
154 | } |