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->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