From 67bffa79231f15ba372007972563cc8aa5e48bfa Mon Sep 17 00:00:00 2001 From: Michal Kubecek Date: Sun, 26 Jan 2020 23:11:19 +0100 Subject: [PATCH] ethtool: add WOL_NTF notification Send ETHTOOL_MSG_WOL_NTF notification whenever wake-on-lan settings of a device are modified using ETHTOOL_MSG_WOL_SET netlink message or ETHTOOL_SWOL ioctl request. As notifications can be received by anyone, do not include SecureOn(tm) password in notification messages. Signed-off-by: Michal Kubecek Signed-off-by: David S. Miller --- Documentation/networking/ethtool-netlink.rst | 5 +++-- include/uapi/linux/ethtool_netlink.h | 1 + net/ethtool/ioctl.c | 1 + net/ethtool/netlink.c | 2 ++ net/ethtool/wol.c | 4 +++- 5 files changed, 10 insertions(+), 3 deletions(-) diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index f16f74bbb546..f1f868479ceb 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -193,7 +193,7 @@ Userspace to kernel: Kernel to userspace: - ===================================== ================================ + ===================================== ================================= ``ETHTOOL_MSG_STRSET_GET_REPLY`` string set contents ``ETHTOOL_MSG_LINKINFO_GET_REPLY`` link settings ``ETHTOOL_MSG_LINKINFO_NTF`` link settings notification @@ -203,7 +203,8 @@ Kernel to userspace: ``ETHTOOL_MSG_DEBUG_GET_REPLY`` debugging settings ``ETHTOOL_MSG_DEBUG_NTF`` debugging settings notification ``ETHTOOL_MSG_WOL_GET_REPLY`` wake-on-lan settings - ===================================== ================================ + ``ETHTOOL_MSG_WOL_NTF`` wake-on-lan settings notification + ===================================== ================================= ``GET`` requests are sent by userspace applications to retrieve device information. They usually do not contain any message specific attributes. diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 59de35695521..7e0b460f872c 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -42,6 +42,7 @@ enum { ETHTOOL_MSG_DEBUG_GET_REPLY, ETHTOOL_MSG_DEBUG_NTF, ETHTOOL_MSG_WOL_GET_REPLY, + ETHTOOL_MSG_WOL_NTF, /* add new constants above here */ __ETHTOOL_MSG_KERNEL_CNT, diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 46e0b31782fc..b88dd14e41c6 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -1316,6 +1316,7 @@ static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) return ret; dev->wol_enabled = !!wol.wolopts; + ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); return 0; } diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 2c375f9095fe..180c194fab07 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -526,6 +526,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, + [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, }; /* default notification handler */ @@ -610,6 +611,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = { [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, + [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, }; void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) diff --git a/net/ethtool/wol.c b/net/ethtool/wol.c index a2724378fac4..e1b8a65b64c4 100644 --- a/net/ethtool/wol.c +++ b/net/ethtool/wol.c @@ -41,7 +41,8 @@ static int wol_prepare_data(const struct ethnl_req_info *req_base, return ret; dev->ethtool_ops->get_wol(dev, &data->wol); ethnl_ops_complete(dev); - data->show_sopass = data->wol.supported & WAKE_MAGICSECURE; + /* do not include password in notifications */ + data->show_sopass = info && (data->wol.supported & WAKE_MAGICSECURE); return 0; } @@ -165,6 +166,7 @@ int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info) if (ret) goto out_ops; dev->wol_enabled = !!wol.wolopts; + ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); out_ops: ethnl_ops_complete(dev);