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Message-Id: <20200510191240.413699-5-andrew@lunn.ch>
Date: Sun, 10 May 2020 21:12:33 +0200
From: Andrew Lunn <andrew@...n.ch>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Florian Fainelli <f.fainelli@...il.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Chris Healy <cphealy@...il.com>,
Michal Kubecek <mkubecek@...e.cz>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next v4 03/10] net: ethtool: netlink: Add support for triggering a cable test
Add new ethtool netlink calls to trigger the starting of a PHY cable
test.
Add Kconfig'ury to ETHTOOL_NETLINK so that PHYLIB is not a module when
ETHTOOL_NETLINK is builtin, which would result in kernel linking errors.
v2:
Remove unwanted white space change
Remove ethnl_cable_test_act_ops and use doit handler
Rename cable_test_set_policy cable_test_act_policy
Remove ETHTOOL_MSG_CABLE_TEST_ACT_REPLY
v3:
Remove ETHTOOL_MSG_CABLE_TEST_ACT_REPLY from documentation
Remove unused cable_test_get_policy
Add Reviewed-by tags
v4:
Remove unwanted blank line
Signed-off-by: Andrew Lunn <andrew@...n.ch>
Reviewed-by: Michal Kubecek <mkubecek@...e.cz>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
---
Documentation/networking/ethtool-netlink.rst | 16 +++++-
include/uapi/linux/ethtool_netlink.h | 12 +++++
net/Kconfig | 1 +
net/ethtool/Makefile | 2 +-
net/ethtool/cabletest.c | 54 ++++++++++++++++++++
net/ethtool/netlink.c | 5 ++
net/ethtool/netlink.h | 1 +
7 files changed, 89 insertions(+), 2 deletions(-)
create mode 100644 net/ethtool/cabletest.c
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 8f5cefc539cf..a8731d33d0c9 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -204,6 +204,7 @@ Userspace to kernel:
``ETHTOOL_MSG_EEE_GET`` get EEE settings
``ETHTOOL_MSG_EEE_SET`` set EEE settings
``ETHTOOL_MSG_TSINFO_GET`` get timestamping info
+ ``ETHTOOL_MSG_CABLE_TEST_ACT`` action start cable test
===================================== ================================
Kernel to userspace:
@@ -958,13 +959,25 @@ Kernel response contents:
is no special value for this case). The bitset attributes are omitted if they
would be empty (no bit set).
+CABLE_TEST
+==========
+
+Start a cable test.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_CABLE_TEST_HEADER`` nested request header
+ ==================================== ====== ==========================
+
Request translation
===================
The following table maps ioctl commands to netlink commands providing their
functionality. Entries with "n/a" in right column are commands which do not
-have their netlink replacement yet.
+have their netlink replacement yet. Entries which "n/a" in the left column
+are netlink only.
=================================== =====================================
ioctl command netlink command
@@ -1053,4 +1066,5 @@ have their netlink replacement yet.
``ETHTOOL_PHY_STUNABLE`` n/a
``ETHTOOL_GFECPARAM`` n/a
``ETHTOOL_SFECPARAM`` n/a
+ n/a ''ETHTOOL_MSG_CABLE_TEST_ACT''
=================================== =====================================
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index bf1d310e20bc..6bfd648c32cf 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -39,6 +39,7 @@ enum {
ETHTOOL_MSG_EEE_GET,
ETHTOOL_MSG_EEE_SET,
ETHTOOL_MSG_TSINFO_GET,
+ ETHTOOL_MSG_CABLE_TEST_ACT,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -405,6 +406,17 @@ enum {
ETHTOOL_A_TSINFO_MAX = (__ETHTOOL_A_TSINFO_CNT - 1)
};
+/* CABLE TEST */
+
+enum {
+ ETHTOOL_A_CABLE_TEST_UNSPEC,
+ ETHTOOL_A_CABLE_TEST_HEADER, /* nest - _A_HEADER_* */
+
+ /* add new constants above here */
+ __ETHTOOL_A_CABLE_TEST_CNT,
+ ETHTOOL_A_CABLE_TEST_MAX = __ETHTOOL_A_CABLE_TEST_CNT - 1
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/Kconfig b/net/Kconfig
index c5ba2d180c43..5c524c6ee75d 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -455,6 +455,7 @@ config FAILOVER
config ETHTOOL_NETLINK
bool "Netlink interface for ethtool"
default y
+ depends on PHYLIB=y || PHYLIB=n
help
An alternative userspace interface for ethtool based on generic
netlink. It provides better extensibility and some new features,
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 6c360c9c9370..0c2b94f20499 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -6,4 +6,4 @@ obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
linkstate.o debug.o wol.o features.o privflags.o rings.o \
- channels.o coalesce.o pause.o eee.o tsinfo.o
+ channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o
diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c
new file mode 100644
index 000000000000..aeb6672a46d0
--- /dev/null
+++ b/net/ethtool/cabletest.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/phy.h>
+#include "netlink.h"
+#include "common.h"
+
+/* CABLE_TEST_ACT */
+
+static const struct nla_policy
+cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1] = {
+ [ETHTOOL_A_CABLE_TEST_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CABLE_TEST_HEADER] = { .type = NLA_NESTED },
+};
+
+int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[ETHTOOL_A_CABLE_TEST_MAX + 1];
+ struct ethnl_req_info req_info = {};
+ struct net_device *dev;
+ int ret;
+
+ ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
+ ETHTOOL_A_CABLE_TEST_MAX,
+ cable_test_act_policy, info->extack);
+ if (ret < 0)
+ return ret;
+
+ ret = ethnl_parse_header_dev_get(&req_info,
+ tb[ETHTOOL_A_CABLE_TEST_HEADER],
+ genl_info_net(info), info->extack,
+ true);
+ if (ret < 0)
+ return ret;
+
+ dev = req_info.dev;
+ if (!dev->phydev) {
+ ret = -EOPNOTSUPP;
+ goto out_dev_put;
+ }
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+
+ ret = phy_start_cable_test(dev->phydev, info->extack);
+
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+out_dev_put:
+ dev_put(dev);
+ return ret;
+}
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 0c772318c023..b9c9ddf408fe 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -839,6 +839,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
+ {
+ .cmd = ETHTOOL_MSG_CABLE_TEST_ACT,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_act_cable_test,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 81b8fa020bcb..bd7df592db2f 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -357,5 +357,6 @@ int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info);
+int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */
--
2.26.2
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