diff options
Diffstat (limited to 'net/ethtool/wol.c')
| -rw-r--r-- | net/ethtool/wol.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/net/ethtool/wol.c b/net/ethtool/wol.c new file mode 100644 index 000000000000..e1b8a65b64c4 --- /dev/null +++ b/net/ethtool/wol.c @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include "netlink.h" +#include "common.h" +#include "bitset.h" + +struct wol_req_info { + struct ethnl_req_info base; +}; + +struct wol_reply_data { + struct ethnl_reply_data base; + struct ethtool_wolinfo wol; + bool show_sopass; +}; + +#define WOL_REPDATA(__reply_base) \ + container_of(__reply_base, struct wol_reply_data, base) + +static const struct nla_policy +wol_get_policy[ETHTOOL_A_WOL_MAX + 1] = { + [ETHTOOL_A_WOL_UNSPEC] = { .type = NLA_REJECT }, + [ETHTOOL_A_WOL_HEADER] = { .type = NLA_NESTED }, + [ETHTOOL_A_WOL_MODES] = { .type = NLA_REJECT }, + [ETHTOOL_A_WOL_SOPASS] = { .type = NLA_REJECT }, +}; + +static int wol_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + struct genl_info *info) +{ + struct wol_reply_data *data = WOL_REPDATA(reply_base); + struct net_device *dev = reply_base->dev; + int ret; + + if (!dev->ethtool_ops->get_wol) + return -EOPNOTSUPP; + + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + dev->ethtool_ops->get_wol(dev, &data->wol); + ethnl_ops_complete(dev); + /* do not include password in notifications */ + data->show_sopass = info && (data->wol.supported & WAKE_MAGICSECURE); + + return 0; +} + +static int wol_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; + const struct wol_reply_data *data = WOL_REPDATA(reply_base); + int len; + + len = ethnl_bitset32_size(&data->wol.wolopts, &data->wol.supported, + WOL_MODE_COUNT, wol_mode_names, compact); + if (len < 0) + return len; + if (data->show_sopass) + len += nla_total_size(sizeof(data->wol.sopass)); + + return len; +} + +static int wol_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; + const struct wol_reply_data *data = WOL_REPDATA(reply_base); + int ret; + + ret = ethnl_put_bitset32(skb, ETHTOOL_A_WOL_MODES, &data->wol.wolopts, + &data->wol.supported, WOL_MODE_COUNT, + wol_mode_names, compact); + if (ret < 0) + return ret; + if (data->show_sopass && + nla_put(skb, ETHTOOL_A_WOL_SOPASS, sizeof(data->wol.sopass), + data->wol.sopass)) + return -EMSGSIZE; + + return 0; +} + +const struct ethnl_request_ops ethnl_wol_request_ops = { + .request_cmd = ETHTOOL_MSG_WOL_GET, + .reply_cmd = ETHTOOL_MSG_WOL_GET_REPLY, + .hdr_attr = ETHTOOL_A_WOL_HEADER, + .max_attr = ETHTOOL_A_WOL_MAX, + .req_info_size = sizeof(struct wol_req_info), + .reply_data_size = sizeof(struct wol_reply_data), + .request_policy = wol_get_policy, + + .prepare_data = wol_prepare_data, + .reply_size = wol_reply_size, + .fill_reply = wol_fill_reply, +}; + +/* WOL_SET */ + +static const struct nla_policy +wol_set_policy[ETHTOOL_A_WOL_MAX + 1] = { + [ETHTOOL_A_WOL_UNSPEC] = { .type = NLA_REJECT }, + [ETHTOOL_A_WOL_HEADER] = { .type = NLA_NESTED }, + [ETHTOOL_A_WOL_MODES] = { .type = NLA_NESTED }, + [ETHTOOL_A_WOL_SOPASS] = { .type = NLA_BINARY, + .len = SOPASS_MAX }, +}; + +int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info) +{ + struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; + struct nlattr *tb[ETHTOOL_A_WOL_MAX + 1]; + struct ethnl_req_info req_info = {}; + struct net_device *dev; + bool mod = false; + int ret; + + ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_WOL_MAX, + wol_set_policy, info->extack); + if (ret < 0) + return ret; + ret = ethnl_parse_header(&req_info, tb[ETHTOOL_A_WOL_HEADER], + genl_info_net(info), info->extack, true); + if (ret < 0) + return ret; + dev = req_info.dev; + if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol) + return -EOPNOTSUPP; + + rtnl_lock(); + ret = ethnl_ops_begin(dev); + if (ret < 0) + goto out_rtnl; + + dev->ethtool_ops->get_wol(dev, &wol); + ret = ethnl_update_bitset32(&wol.wolopts, WOL_MODE_COUNT, + tb[ETHTOOL_A_WOL_MODES], wol_mode_names, + info->extack, &mod); + if (ret < 0) + goto out_ops; + if (wol.wolopts & ~wol.supported) { + NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_WOL_MODES], + "cannot enable unsupported WoL mode"); + ret = -EINVAL; + goto out_ops; + } + if (tb[ETHTOOL_A_WOL_SOPASS]) { + if (!(wol.supported & WAKE_MAGICSECURE)) { + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_WOL_SOPASS], + "magicsecure not supported, cannot set password"); + ret = -EINVAL; + goto out_ops; + } + ethnl_update_binary(wol.sopass, sizeof(wol.sopass), + tb[ETHTOOL_A_WOL_SOPASS], &mod); + } + + if (!mod) + goto out_ops; + ret = dev->ethtool_ops->set_wol(dev, &wol); + if (ret) + goto out_ops; + dev->wol_enabled = !!wol.wolopts; + ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); + +out_ops: + ethnl_ops_complete(dev); +out_rtnl: + rtnl_unlock(); + dev_put(dev); + return ret; +} |