From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61CB8C2D0C8 for ; Sun, 22 Dec 2019 23:46:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 30BE4205C9 for ; Sun, 22 Dec 2019 23:46:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727070AbfLVXqA (ORCPT ); Sun, 22 Dec 2019 18:46:00 -0500 Received: from mx2.suse.de ([195.135.220.15]:55412 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726943AbfLVXp5 (ORCPT ); Sun, 22 Dec 2019 18:45:57 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 91107AFDF; Sun, 22 Dec 2019 23:45:54 +0000 (UTC) Received: by unicorn.suse.cz (Postfix, from userid 1000) id 3CEB7E03A8; Mon, 23 Dec 2019 00:45:54 +0100 (CET) Message-Id: <916e2bfa265b6c64522167a73ebcdda710d9d63c.1577052887.git.mkubecek@suse.cz> In-Reply-To: References: From: Michal Kubecek Subject: [PATCH net-next v8 08/14] ethtool: set link settings with LINKINFO_SET request To: David Miller , netdev@vger.kernel.org Cc: Jakub Kicinski , Jiri Pirko , Andrew Lunn , Florian Fainelli , John Linville , Stephen Hemminger , Johannes Berg , linux-kernel@vger.kernel.org Date: Mon, 23 Dec 2019 00:45:54 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement LINKINFO_SET netlink request to set link settings queried by LINKINFO_GET message. Only physical port, phy MDIO address and MDI(-X) control can be set, attempt to modify MDI(-X) status and transceiver is rejected. Signed-off-by: Michal Kubecek --- Documentation/networking/ethtool-netlink.rst | 24 ++++++- include/uapi/linux/ethtool_netlink.h | 1 + net/ethtool/linkinfo.c | 71 ++++++++++++++++++++ net/ethtool/netlink.c | 5 ++ net/ethtool/netlink.h | 2 + 5 files changed, 101 insertions(+), 2 deletions(-) diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 3460d6e31b82..e16ef058404f 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -171,6 +171,7 @@ Userspace to kernel: ===================================== ================================ ``ETHTOOL_MSG_STRSET_GET`` get string set ``ETHTOOL_MSG_LINKINFO_GET`` get link settings + ``ETHTOOL_MSG_LINKINFO_SET`` set link settings ===================================== ================================ Kernel to userspace: @@ -301,6 +302,25 @@ corresponding ioctl structures. devices supporting the request). +LINKINFO_SET +============ + +``LINKINFO_SET`` request allows setting some of the attributes reported by +``LINKINFO_GET``. + +Request contents: + + ==================================== ====== ========================== + ``ETHTOOL_A_LINKINFO_HEADER`` nested request header + ``ETHTOOL_A_LINKINFO_PORT`` u8 physical port + ``ETHTOOL_A_LINKINFO_PHYADDR`` u8 phy MDIO address + ``ETHTOOL_A_LINKINFO_TP_MDIX_CTRL`` u8 MDI(-X) control + ==================================== ====== ========================== + +MDI(-X) status and transceiver cannot be set, request with the corresponding +attributes is rejected. + + Request translation =================== @@ -312,7 +332,7 @@ have their netlink replacement yet. ioctl command netlink command =================================== ===================================== ``ETHTOOL_GSET`` ``ETHTOOL_MSG_LINKINFO_GET`` - ``ETHTOOL_SSET`` n/a + ``ETHTOOL_SSET`` ``ETHTOOL_MSG_LINKINFO_SET`` ``ETHTOOL_GDRVINFO`` n/a ``ETHTOOL_GREGS`` n/a ``ETHTOOL_GWOL`` n/a @@ -386,7 +406,7 @@ have their netlink replacement yet. ``ETHTOOL_GPHYSTATS`` n/a ``ETHTOOL_PERQUEUE`` n/a ``ETHTOOL_GLINKSETTINGS`` ``ETHTOOL_MSG_LINKINFO_GET`` - ``ETHTOOL_SLINKSETTINGS`` n/a + ``ETHTOOL_SLINKSETTINGS`` ``ETHTOOL_MSG_LINKINFO_SET`` ``ETHTOOL_PHY_GTUNABLE`` n/a ``ETHTOOL_PHY_STUNABLE`` n/a ``ETHTOOL_GFECPARAM`` n/a diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 1966532993e5..5b7806a5bef8 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -16,6 +16,7 @@ enum { ETHTOOL_MSG_USER_NONE, ETHTOOL_MSG_STRSET_GET, ETHTOOL_MSG_LINKINFO_GET, + ETHTOOL_MSG_LINKINFO_SET, /* add new constants above here */ __ETHTOOL_MSG_USER_CNT, 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; +} diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index ce86d97c922e..7867425956f6 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -534,6 +534,11 @@ static const struct genl_ops ethtool_genl_ops[] = { .dumpit = ethnl_default_dumpit, .done = ethnl_default_done, }, + { + .cmd = ETHTOOL_MSG_LINKINFO_SET, + .flags = GENL_UNS_ADMIN_PERM, + .doit = ethnl_set_linkinfo, + }, }; static const struct genl_multicast_group ethtool_nl_mcgrps[] = { diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index b2f4a49ae837..3448029e3ea2 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -331,4 +331,6 @@ struct ethnl_request_ops { extern const struct ethnl_request_ops ethnl_strset_request_ops; extern const struct ethnl_request_ops ethnl_linkinfo_request_ops; +int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info); + #endif /* _NET_ETHTOOL_NETLINK_H */ -- 2.24.1