wol.c
4.31 KB
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// 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)
const struct nla_policy ethnl_wol_get_policy[] = {
[ETHTOOL_A_WOL_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
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,
.req_info_size = sizeof(struct wol_req_info),
.reply_data_size = sizeof(struct wol_reply_data),
.prepare_data = wol_prepare_data,
.reply_size = wol_reply_size,
.fill_reply = wol_fill_reply,
};
/* WOL_SET */
const struct nla_policy ethnl_wol_set_policy[] = {
[ETHTOOL_A_WOL_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
[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 ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
struct net_device *dev;
bool mod = false;
int ret;
ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_WOL_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
dev = req_info.dev;
ret = -EOPNOTSUPP;
if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
goto out_dev;
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();
out_dev:
dev_put(dev);
return ret;
}