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ethtool: set wake-on-lan settings with WOL_SET request

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Implement WOL_SET netlink request to set wake-on-lan settings. This is
equivalent to ETHTOOL_SWOL ioctl request.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kubecek 2020-01-26 23:11:16 +01:00 committed by David S. Miller
parent 51ea22b04e
commit 8d425b19b3
5 changed files with 102 additions and 1 deletions
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20
Documentation/networking/ethtool-netlink.rst
View File

@ -188,6 +188,7 @@ Userspace to kernel:
``ETHTOOL_MSG_DEBUG_GET`` get debugging settings
``ETHTOOL_MSG_DEBUG_SET`` set debugging settings
``ETHTOOL_MSG_WOL_GET`` get wake-on-lan settings
``ETHTOOL_MSG_WOL_SET`` set wake-on-lan settings
===================================== ================================
Kernel to userspace:
@ -502,6 +503,23 @@ device, value of modes which are enabled. ``ETHTOOL_A_WOL_SOPASS`` is only
included in reply if ``WAKE_MAGICSECURE`` mode is supported.
WOL_SET
=======
Set or update wake-on-lan settings.
Request contents:
==================================== ====== ==========================
``ETHTOOL_A_WOL_HEADER`` nested request header
``ETHTOOL_A_WOL_MODES`` bitset enabled WoL modes
``ETHTOOL_A_WOL_SOPASS`` binary SecureOn(tm) password
==================================== ====== ==========================
``ETHTOOL_A_WOL_SOPASS`` is only allowed for devices supporting
``WAKE_MAGICSECURE`` mode.
Request translation
===================
@ -519,7 +537,7 @@ have their netlink replacement yet.
``ETHTOOL_GDRVINFO`` n/a
``ETHTOOL_GREGS`` n/a
``ETHTOOL_GWOL`` ``ETHTOOL_MSG_WOL_GET``
``ETHTOOL_SWOL`` n/a
``ETHTOOL_SWOL`` ``ETHTOOL_MSG_WOL_SET``
``ETHTOOL_GMSGLVL`` ``ETHTOOL_MSG_DEBUG_GET``
``ETHTOOL_SMSGLVL`` ``ETHTOOL_MSG_DEBUG_SET``
``ETHTOOL_NWAY_RST`` n/a

1
include/uapi/linux/ethtool_netlink.h
View File

@ -23,6 +23,7 @@ enum {
ETHTOOL_MSG_DEBUG_GET,
ETHTOOL_MSG_DEBUG_SET,
ETHTOOL_MSG_WOL_GET,
ETHTOOL_MSG_WOL_SET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,

5
net/ethtool/netlink.c
View File

@ -688,6 +688,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
{
.cmd = ETHTOOL_MSG_WOL_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_wol,
},
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {

1
net/ethtool/netlink.h
View File

@ -340,5 +340,6 @@ extern const struct ethnl_request_ops ethnl_wol_request_ops;
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */

76
net/ethtool/wol.c
View File

@ -97,3 +97,79 @@ const struct ethnl_request_ops ethnl_wol_request_ops = {
.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;
out_ops:
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
dev_put(dev);
return ret;
}