wol.c (4440B)
1// SPDX-License-Identifier: GPL-2.0-only 2 3#include "netlink.h" 4#include "common.h" 5#include "bitset.h" 6 7struct wol_req_info { 8 struct ethnl_req_info base; 9}; 10 11struct 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 20const struct nla_policy ethnl_wol_get_policy[] = { 21 [ETHTOOL_A_WOL_HEADER] = 22 NLA_POLICY_NESTED(ethnl_header_policy), 23}; 24 25static 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 47static 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 64static 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 85const struct ethnl_request_ops ethnl_wol_request_ops = { 86 .request_cmd = ETHTOOL_MSG_WOL_GET, 87 .reply_cmd = ETHTOOL_MSG_WOL_GET_REPLY, 88 .hdr_attr = ETHTOOL_A_WOL_HEADER, 89 .req_info_size = sizeof(struct wol_req_info), 90 .reply_data_size = sizeof(struct wol_reply_data), 91 92 .prepare_data = wol_prepare_data, 93 .reply_size = wol_reply_size, 94 .fill_reply = wol_fill_reply, 95}; 96 97/* WOL_SET */ 98 99const struct nla_policy ethnl_wol_set_policy[] = { 100 [ETHTOOL_A_WOL_HEADER] = 101 NLA_POLICY_NESTED(ethnl_header_policy), 102 [ETHTOOL_A_WOL_MODES] = { .type = NLA_NESTED }, 103 [ETHTOOL_A_WOL_SOPASS] = { .type = NLA_BINARY, 104 .len = SOPASS_MAX }, 105}; 106 107int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info) 108{ 109 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 110 struct ethnl_req_info req_info = {}; 111 struct nlattr **tb = info->attrs; 112 struct net_device *dev; 113 bool mod = false; 114 int ret; 115 116 ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_WOL_HEADER], 117 genl_info_net(info), info->extack, 118 true); 119 if (ret < 0) 120 return ret; 121 dev = req_info.dev; 122 ret = -EOPNOTSUPP; 123 if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol) 124 goto out_dev; 125 126 rtnl_lock(); 127 ret = ethnl_ops_begin(dev); 128 if (ret < 0) 129 goto out_rtnl; 130 131 dev->ethtool_ops->get_wol(dev, &wol); 132 ret = ethnl_update_bitset32(&wol.wolopts, WOL_MODE_COUNT, 133 tb[ETHTOOL_A_WOL_MODES], wol_mode_names, 134 info->extack, &mod); 135 if (ret < 0) 136 goto out_ops; 137 if (wol.wolopts & ~wol.supported) { 138 NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_WOL_MODES], 139 "cannot enable unsupported WoL mode"); 140 ret = -EINVAL; 141 goto out_ops; 142 } 143 if (tb[ETHTOOL_A_WOL_SOPASS]) { 144 if (!(wol.supported & WAKE_MAGICSECURE)) { 145 NL_SET_ERR_MSG_ATTR(info->extack, 146 tb[ETHTOOL_A_WOL_SOPASS], 147 "magicsecure not supported, cannot set password"); 148 ret = -EINVAL; 149 goto out_ops; 150 } 151 ethnl_update_binary(wol.sopass, sizeof(wol.sopass), 152 tb[ETHTOOL_A_WOL_SOPASS], &mod); 153 } 154 155 if (!mod) 156 goto out_ops; 157 ret = dev->ethtool_ops->set_wol(dev, &wol); 158 if (ret) 159 goto out_ops; 160 dev->wol_enabled = !!wol.wolopts; 161 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); 162 163out_ops: 164 ethnl_ops_complete(dev); 165out_rtnl: 166 rtnl_unlock(); 167out_dev: 168 ethnl_parse_header_dev_put(&req_info); 169 return ret; 170}