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 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 = info && (data->wol.supported & WAKE_MAGICSECURE); 43 44 return 0; 45 } 46 47 static int wol_reply_size(const struct ethnl_req_info *req_base, 48 const struct ethnl_reply_data *reply_base) 49 { 50 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; 51 const struct wol_reply_data *data = WOL_REPDATA(reply_base); 52 int len; 53 54 len = ethnl_bitset32_size(&data->wol.wolopts, &data->wol.supported, 55 WOL_MODE_COUNT, wol_mode_names, compact); 56 if (len < 0) 57 return len; 58 if (data->show_sopass) 59 len += nla_total_size(sizeof(data->wol.sopass)); 60 61 return len; 62 } 63 64 static int wol_fill_reply(struct sk_buff *skb, 65 const struct ethnl_req_info *req_base, 66 const struct ethnl_reply_data *reply_base) 67 { 68 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; 69 const struct wol_reply_data *data = WOL_REPDATA(reply_base); 70 int ret; 71 72 ret = ethnl_put_bitset32(skb, ETHTOOL_A_WOL_MODES, &data->wol.wolopts, 73 &data->wol.supported, WOL_MODE_COUNT, 74 wol_mode_names, compact); 75 if (ret < 0) 76 return ret; 77 if (data->show_sopass && 78 nla_put(skb, ETHTOOL_A_WOL_SOPASS, sizeof(data->wol.sopass), 79 data->wol.sopass)) 80 return -EMSGSIZE; 81 82 return 0; 83 } 84 85 /* WOL_SET */ 86 87 const struct nla_policy ethnl_wol_set_policy[] = { 88 [ETHTOOL_A_WOL_HEADER] = 89 NLA_POLICY_NESTED(ethnl_header_policy), 90 [ETHTOOL_A_WOL_MODES] = { .type = NLA_NESTED }, 91 [ETHTOOL_A_WOL_SOPASS] = { .type = NLA_BINARY, 92 .len = SOPASS_MAX }, 93 }; 94 95 static int 96 ethnl_set_wol_validate(struct ethnl_req_info *req_info, struct genl_info *info) 97 { 98 const struct ethtool_ops *ops = req_info->dev->ethtool_ops; 99 100 return ops->get_wol && ops->set_wol ? 1 : -EOPNOTSUPP; 101 } 102 103 static int 104 ethnl_set_wol(struct ethnl_req_info *req_info, struct genl_info *info) 105 { 106 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 107 struct net_device *dev = req_info->dev; 108 struct nlattr **tb = info->attrs; 109 bool mod = false; 110 int ret; 111 112 dev->ethtool_ops->get_wol(dev, &wol); 113 ret = ethnl_update_bitset32(&wol.wolopts, WOL_MODE_COUNT, 114 tb[ETHTOOL_A_WOL_MODES], wol_mode_names, 115 info->extack, &mod); 116 if (ret < 0) 117 return ret; 118 if (wol.wolopts & ~wol.supported) { 119 NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_WOL_MODES], 120 "cannot enable unsupported WoL mode"); 121 return -EINVAL; 122 } 123 if (tb[ETHTOOL_A_WOL_SOPASS]) { 124 if (!(wol.supported & WAKE_MAGICSECURE)) { 125 NL_SET_ERR_MSG_ATTR(info->extack, 126 tb[ETHTOOL_A_WOL_SOPASS], 127 "magicsecure not supported, cannot set password"); 128 return -EINVAL; 129 } 130 ethnl_update_binary(wol.sopass, sizeof(wol.sopass), 131 tb[ETHTOOL_A_WOL_SOPASS], &mod); 132 } 133 134 if (!mod) 135 return 0; 136 ret = dev->ethtool_ops->set_wol(dev, &wol); 137 if (ret) 138 return ret; 139 dev->wol_enabled = !!wol.wolopts; 140 return 1; 141 } 142 143 const struct ethnl_request_ops ethnl_wol_request_ops = { 144 .request_cmd = ETHTOOL_MSG_WOL_GET, 145 .reply_cmd = ETHTOOL_MSG_WOL_GET_REPLY, 146 .hdr_attr = ETHTOOL_A_WOL_HEADER, 147 .req_info_size = sizeof(struct wol_req_info), 148 .reply_data_size = sizeof(struct wol_reply_data), 149 150 .prepare_data = wol_prepare_data, 151 .reply_size = wol_reply_size, 152 .fill_reply = wol_fill_reply, 153 154 .set_validate = ethnl_set_wol_validate, 155 .set = ethnl_set_wol, 156 .set_ntf_cmd = ETHTOOL_MSG_WOL_NTF, 157 }; 158