1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include "netlink.h"
4 #include "common.h"
5 #include "bitset.h"
6
7 struct wol_req_info {
8 struct ethnl_req_info base;
9 };
10
11 struct wol_reply_data {
12 struct ethnl_reply_data base;
13 struct ethtool_wolinfo wol;
14 bool show_sopass;
15 };
16
17 #define WOL_REPDATA(__reply_base) \
18 container_of(__reply_base, struct wol_reply_data, base)
19
20 const struct nla_policy ethnl_wol_get_policy[] = {
21 [ETHTOOL_A_WOL_HEADER] =
22 NLA_POLICY_NESTED(ethnl_header_policy),
23 };
24
25 static int wol_prepare_data(const struct ethnl_req_info *req_base,
26 struct ethnl_reply_data *reply_base,
27 const struct genl_info *info)
28 {
29 struct wol_reply_data *data = WOL_REPDATA(reply_base);
30 struct net_device *dev = reply_base->dev;
31 int ret;
32
33 if (!dev->ethtool_ops->get_wol)
34 return -EOPNOTSUPP;
35
36 ret = ethnl_ops_begin(dev);
37 if (ret < 0)
38 return ret;
39 dev->ethtool_ops->get_wol(dev, &data->wol);
40 ethnl_ops_complete(dev);
41 /* do not include password in notifications */
42 data->show_sopass = !genl_info_is_ntf(info) &&
43 (data->wol.supported & WAKE_MAGICSECURE);
44
45 return 0;
46 }
47
48 static int wol_reply_size(const struct ethnl_req_info *req_base,
49 const struct ethnl_reply_data *reply_base)
50 {
51 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
52 const struct wol_reply_data *data = WOL_REPDATA(reply_base);
53 int len;
54
55 len = ethnl_bitset32_size(&data->wol.wolopts, &data->wol.supported,
56 WOL_MODE_COUNT, wol_mode_names, compact);
57 if (len < 0)
58 return len;
59 if (data->show_sopass)
60 len += nla_total_size(sizeof(data->wol.sopass));
61
62 return len;
63 }
64
65 static int wol_fill_reply(struct sk_buff *skb,
66 const struct ethnl_req_info *req_base,
67 const struct ethnl_reply_data *reply_base)
68 {
69 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
70 const struct wol_reply_data *data = WOL_REPDATA(reply_base);
71 int ret;
72
73 ret = ethnl_put_bitset32(skb, ETHTOOL_A_WOL_MODES, &data->wol.wolopts,
74 &data->wol.supported, WOL_MODE_COUNT,
75 wol_mode_names, compact);
76 if (ret < 0)
77 return ret;
78 if (data->show_sopass &&
79 nla_put(skb, ETHTOOL_A_WOL_SOPASS, sizeof(data->wol.sopass),
80 data->wol.sopass))
81 return -EMSGSIZE;
82
83 return 0;
84 }
85
86 /* WOL_SET */
87
88 const struct nla_policy ethnl_wol_set_policy[] = {
89 [ETHTOOL_A_WOL_HEADER] =
90 NLA_POLICY_NESTED(ethnl_header_policy),
91 [ETHTOOL_A_WOL_MODES] = { .type = NLA_NESTED },
92 [ETHTOOL_A_WOL_SOPASS] = { .type = NLA_BINARY,
93 .len = SOPASS_MAX },
94 };
95
96 static int
97 ethnl_set_wol_validate(struct ethnl_req_info *req_info, struct genl_info *info)
98 {
99 const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
100
101 return ops->get_wol && ops->set_wol ? 1 : -EOPNOTSUPP;
102 }
103
104 static int
105 ethnl_set_wol(struct ethnl_req_info *req_info, struct genl_info *info)
106 {
107 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
108 struct net_device *dev = req_info->dev;
109 struct nlattr **tb = info->attrs;
110 bool mod = false;
111 int ret;
112
113 dev->ethtool_ops->get_wol(dev, &wol);
114 ret = ethnl_update_bitset32(&wol.wolopts, WOL_MODE_COUNT,
115 tb[ETHTOOL_A_WOL_MODES], wol_mode_names,
116 info->extack, &mod);
117 if (ret < 0)
118 return ret;
119 if (wol.wolopts & ~wol.supported) {
120 NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_WOL_MODES],
121 "cannot enable unsupported WoL mode");
122 return -EINVAL;
123 }
124 if (tb[ETHTOOL_A_WOL_SOPASS]) {
125 if (!(wol.supported & WAKE_MAGICSECURE)) {
126 NL_SET_ERR_MSG_ATTR(info->extack,
127 tb[ETHTOOL_A_WOL_SOPASS],
128 "magicsecure not supported, cannot set password");
129 return -EINVAL;
130 }
131 ethnl_update_binary(wol.sopass, sizeof(wol.sopass),
132 tb[ETHTOOL_A_WOL_SOPASS], &mod);
133 }
134
135 if (!mod)
136 return 0;
137 ret = dev->ethtool_ops->set_wol(dev, &wol);
138 if (ret)
139 return ret;
140 dev->ethtool->wol_enabled = !!wol.wolopts;
141 return 1;
142 }
143
144 const struct ethnl_request_ops ethnl_wol_request_ops = {
145 .request_cmd = ETHTOOL_MSG_WOL_GET,
146 .reply_cmd = ETHTOOL_MSG_WOL_GET_REPLY,
147 .hdr_attr = ETHTOOL_A_WOL_HEADER,
148 .req_info_size = sizeof(struct wol_req_info),
149 .reply_data_size = sizeof(struct wol_reply_data),
150
151 .prepare_data = wol_prepare_data,
152 .reply_size = wol_reply_size,
153 .fill_reply = wol_fill_reply,
154
155 .set_validate = ethnl_set_wol_validate,
156 .set = ethnl_set_wol,
157 .set_ntf_cmd = ETHTOOL_MSG_WOL_NTF,
158 };
159
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