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-rw-r--r--net/ethtool/linkinfo.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/net/ethtool/linkinfo.c b/net/ethtool/linkinfo.c
index f52a31af6fff..8a5f68f92425 100644
--- a/net/ethtool/linkinfo.c
+++ b/net/ethtool/linkinfo.c
@@ -92,3 +92,74 @@ const struct ethnl_request_ops ethnl_linkinfo_request_ops = {
.reply_size = linkinfo_reply_size,
.fill_reply = linkinfo_fill_reply,
};
+
+/* LINKINFO_SET */
+
+static const struct nla_policy
+linkinfo_set_policy[ETHTOOL_A_LINKINFO_MAX + 1] = {
+ [ETHTOOL_A_LINKINFO_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_LINKINFO_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_U8 },
+ [ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_U8 },
+ [ETHTOOL_A_LINKINFO_TP_MDIX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_U8 },
+ [ETHTOOL_A_LINKINFO_TRANSCEIVER] = { .type = NLA_REJECT },
+};
+
+int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[ETHTOOL_A_LINKINFO_MAX + 1];
+ struct ethtool_link_ksettings ksettings = {};
+ struct ethtool_link_settings *lsettings;
+ 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_LINKINFO_MAX, linkinfo_set_policy,
+ info->extack);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_parse_header(&req_info, tb[ETHTOOL_A_LINKINFO_HEADER],
+ genl_info_net(info), info->extack, true);
+ if (ret < 0)
+ return ret;
+ dev = req_info.dev;
+ if (!dev->ethtool_ops->get_link_ksettings ||
+ !dev->ethtool_ops->set_link_ksettings)
+ return -EOPNOTSUPP;
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+
+ ret = __ethtool_get_link_ksettings(dev, &ksettings);
+ if (ret < 0) {
+ if (info)
+ GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
+ goto out_ops;
+ }
+ lsettings = &ksettings.base;
+
+ ethnl_update_u8(&lsettings->port, tb[ETHTOOL_A_LINKINFO_PORT], &mod);
+ ethnl_update_u8(&lsettings->phy_address, tb[ETHTOOL_A_LINKINFO_PHYADDR],
+ &mod);
+ ethnl_update_u8(&lsettings->eth_tp_mdix_ctrl,
+ tb[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL], &mod);
+ ret = 0;
+ if (!mod)
+ goto out_ops;
+
+ ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
+ if (ret < 0)
+ GENL_SET_ERR_MSG(info, "link settings update failed");
+
+out_ops:
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+ dev_put(dev);
+ return ret;
+}