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ethtool: provide WoL settings with WOL_GET request 

Implement WOL_GET request to get wake-on-lan settings for a device,
traditionally available via ETHTOOL_GWOL ioctl request.

As part of the implementation, provide symbolic names for wake-on-line
modes as ETH_SS_WOL_MODES string set.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kubecek 2020-01-26 23:11:13 +01:00 committed by David S. Miller
parent 0bda7af39d
commit 51ea22b04e
10 changed files with 176 additions and 2 deletions
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30
Documentation/networking/ethtool-netlink.rst
View File

@ -187,6 +187,7 @@ Userspace to kernel:
``ETHTOOL_MSG_LINKSTATE_GET`` get link state
``ETHTOOL_MSG_DEBUG_GET`` get debugging settings
``ETHTOOL_MSG_DEBUG_SET`` set debugging settings
``ETHTOOL_MSG_WOL_GET`` get wake-on-lan settings
===================================== ================================
Kernel to userspace:
@ -200,6 +201,7 @@ Kernel to userspace:
``ETHTOOL_MSG_LINKSTATE_GET_REPLY`` link state info
``ETHTOOL_MSG_DEBUG_GET_REPLY`` debugging settings
``ETHTOOL_MSG_DEBUG_NTF`` debugging settings notification
``ETHTOOL_MSG_WOL_GET_REPLY`` wake-on-lan settings
===================================== ================================
``GET`` requests are sent by userspace applications to retrieve device
@ -474,6 +476,32 @@ Request contents:
enabled debugging message types for the device.
WOL_GET
=======
Query device wake-on-lan settings. Unlike most "GET" type requests,
``ETHTOOL_MSG_WOL_GET`` requires (netns) ``CAP_NET_ADMIN`` privileges as it
(potentially) provides SecureOn(tm) password which is confidential.
Request contents:
==================================== ====== ==========================
``ETHTOOL_A_WOL_HEADER`` nested request header
==================================== ====== ==========================
Kernel response contents:
==================================== ====== ==========================
``ETHTOOL_A_WOL_HEADER`` nested reply header
``ETHTOOL_A_WOL_MODES`` bitset mask of enabled WoL modes
``ETHTOOL_A_WOL_SOPASS`` binary SecureOn(tm) password
==================================== ====== ==========================
In reply, ``ETHTOOL_A_WOL_MODES`` mask consists of modes supported by the
device, value of modes which are enabled. ``ETHTOOL_A_WOL_SOPASS`` is only
included in reply if ``WAKE_MAGICSECURE`` mode is supported.
Request translation
===================
@ -490,7 +518,7 @@ have their netlink replacement yet.
``ETHTOOL_MSG_LINKMODES_SET``
``ETHTOOL_GDRVINFO`` n/a
``ETHTOOL_GREGS`` n/a
``ETHTOOL_GWOL`` n/a
``ETHTOOL_GWOL`` ``ETHTOOL_MSG_WOL_GET``
``ETHTOOL_SWOL`` n/a
``ETHTOOL_GMSGLVL`` ``ETHTOOL_MSG_DEBUG_GET``
``ETHTOOL_SMSGLVL`` ``ETHTOOL_MSG_DEBUG_SET``

4
include/uapi/linux/ethtool.h
View File

@ -595,6 +595,7 @@ struct ethtool_pauseparam {
* @ETH_SS_PHY_TUNABLES: PHY tunable names
* @ETH_SS_LINK_MODES: link mode names
* @ETH_SS_MSG_CLASSES: debug message class names
* @ETH_SS_WOL_MODES: wake-on-lan modes
*/
enum ethtool_stringset {
ETH_SS_TEST = 0,
@ -608,6 +609,7 @@ enum ethtool_stringset {
ETH_SS_PHY_TUNABLES,
ETH_SS_LINK_MODES,
ETH_SS_MSG_CLASSES,
ETH_SS_WOL_MODES,
/* add new constants above here */
ETH_SS_COUNT
@ -1695,6 +1697,8 @@ static inline int ethtool_validate_duplex(__u8 duplex)
#define WAKE_MAGICSECURE (1 << 6) /* only meaningful if WAKE_MAGIC */
#define WAKE_FILTER (1 << 7)
#define WOL_MODE_COUNT 8
/* L2-L4 network traffic flow types */
#define TCP_V4_FLOW 0x01 /* hash or spec (tcp_ip4_spec) */
#define UDP_V4_FLOW 0x02 /* hash or spec (udp_ip4_spec) */

15
include/uapi/linux/ethtool_netlink.h
View File

@ -22,6 +22,7 @@ enum {
ETHTOOL_MSG_LINKSTATE_GET,
ETHTOOL_MSG_DEBUG_GET,
ETHTOOL_MSG_DEBUG_SET,
ETHTOOL_MSG_WOL_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@ -39,6 +40,7 @@ enum {
ETHTOOL_MSG_LINKSTATE_GET_REPLY,
ETHTOOL_MSG_DEBUG_GET_REPLY,
ETHTOOL_MSG_DEBUG_NTF,
ETHTOOL_MSG_WOL_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@ -211,6 +213,19 @@ enum {
ETHTOOL_A_DEBUG_MAX = __ETHTOOL_A_DEBUG_CNT - 1
};
/* WOL */
enum {
ETHTOOL_A_WOL_UNSPEC,
ETHTOOL_A_WOL_HEADER, /* nest - _A_HEADER_* */
ETHTOOL_A_WOL_MODES, /* bitset */
ETHTOOL_A_WOL_SOPASS, /* binary */
/* add new constants above here */
__ETHTOOL_A_WOL_CNT,
ETHTOOL_A_WOL_MAX = __ETHTOOL_A_WOL_CNT - 1
};
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1

2
net/ethtool/Makefile
View File

@ -5,4 +5,4 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
linkstate.o debug.o
linkstate.o debug.o wol.o

12
net/ethtool/common.c
View File

@ -190,6 +190,18 @@ const char netif_msg_class_names[][ETH_GSTRING_LEN] = {
};
static_assert(ARRAY_SIZE(netif_msg_class_names) == NETIF_MSG_CLASS_COUNT);
const char wol_mode_names[][ETH_GSTRING_LEN] = {
[const_ilog2(WAKE_PHY)] = "phy",
[const_ilog2(WAKE_UCAST)] = "ucast",
[const_ilog2(WAKE_MCAST)] = "mcast",
[const_ilog2(WAKE_BCAST)] = "bcast",
[const_ilog2(WAKE_ARP)] = "arp",
[const_ilog2(WAKE_MAGIC)] = "magic",
[const_ilog2(WAKE_MAGICSECURE)] = "magicsecure",
[const_ilog2(WAKE_FILTER)] = "filter",
};
static_assert(ARRAY_SIZE(wol_mode_names) == WOL_MODE_COUNT);
/* return false if legacy contained non-0 deprecated fields
* maxtxpkt/maxrxpkt. rest of ksettings always updated
*/

1
net/ethtool/common.h
View File

@ -20,6 +20,7 @@ extern const char
phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN];
extern const char link_mode_names[][ETH_GSTRING_LEN];
extern const char netif_msg_class_names[][ETH_GSTRING_LEN];
extern const char wol_mode_names[][ETH_GSTRING_LEN];
int __ethtool_get_link(struct net_device *dev);

9
net/ethtool/netlink.c
View File

@ -214,6 +214,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_LINKMODES_GET] = &ethnl_linkmodes_request_ops,
[ETHTOOL_MSG_LINKSTATE_GET] = &ethnl_linkstate_request_ops,
[ETHTOOL_MSG_DEBUG_GET] = &ethnl_debug_request_ops,
[ETHTOOL_MSG_WOL_GET] = &ethnl_wol_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@ -679,6 +680,14 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_debug,
},
{
.cmd = ETHTOOL_MSG_WOL_GET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_default_doit,
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {

1
net/ethtool/netlink.h
View File

@ -335,6 +335,7 @@ extern const struct ethnl_request_ops ethnl_linkinfo_request_ops;
extern const struct ethnl_request_ops ethnl_linkmodes_request_ops;
extern const struct ethnl_request_ops ethnl_linkstate_request_ops;
extern const struct ethnl_request_ops ethnl_debug_request_ops;
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);

5
net/ethtool/strset.c
View File

@ -55,6 +55,11 @@ static const struct strset_info info_template[] = {
.count = NETIF_MSG_CLASS_COUNT,
.strings = netif_msg_class_names,
},
[ETH_SS_WOL_MODES] = {
.per_dev = false,
.count = WOL_MODE_COUNT,
.strings = wol_mode_names,
},
};
struct strset_req_info {

99
net/ethtool/wol.c Normal file
View File

@ -0,0 +1,99 @@
// SPDX-License-Identifier: GPL-2.0-only
#include "netlink.h"
#include "common.h"
#include "bitset.h"
struct wol_req_info {
struct ethnl_req_info base;
};
struct wol_reply_data {
struct ethnl_reply_data base;
struct ethtool_wolinfo wol;
bool show_sopass;
};
#define WOL_REPDATA(__reply_base) \
container_of(__reply_base, struct wol_reply_data, base)
static const struct nla_policy
wol_get_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_REJECT },
[ETHTOOL_A_WOL_SOPASS] = { .type = NLA_REJECT },
};
static int wol_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct wol_reply_data *data = WOL_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
int ret;
if (!dev->ethtool_ops->get_wol)
return -EOPNOTSUPP;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
dev->ethtool_ops->get_wol(dev, &data->wol);
ethnl_ops_complete(dev);
data->show_sopass = data->wol.supported & WAKE_MAGICSECURE;
return 0;
}
static int wol_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
const struct wol_reply_data *data = WOL_REPDATA(reply_base);
int len;
len = ethnl_bitset32_size(&data->wol.wolopts, &data->wol.supported,
WOL_MODE_COUNT, wol_mode_names, compact);
if (len < 0)
return len;
if (data->show_sopass)
len += nla_total_size(sizeof(data->wol.sopass));
return len;
}
static int wol_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
const struct wol_reply_data *data = WOL_REPDATA(reply_base);
int ret;
ret = ethnl_put_bitset32(skb, ETHTOOL_A_WOL_MODES, &data->wol.wolopts,
&data->wol.supported, WOL_MODE_COUNT,
wol_mode_names, compact);
if (ret < 0)
return ret;
if (data->show_sopass &&
nla_put(skb, ETHTOOL_A_WOL_SOPASS, sizeof(data->wol.sopass),
data->wol.sopass))
return -EMSGSIZE;
return 0;
}
const struct ethnl_request_ops ethnl_wol_request_ops = {
.request_cmd = ETHTOOL_MSG_WOL_GET,
.reply_cmd = ETHTOOL_MSG_WOL_GET_REPLY,
.hdr_attr = ETHTOOL_A_WOL_HEADER,
.max_attr = ETHTOOL_A_WOL_MAX,
.req_info_size = sizeof(struct wol_req_info),
.reply_data_size = sizeof(struct wol_reply_data),
.request_policy = wol_get_policy,
.prepare_data = wol_prepare_data,
.reply_size = wol_reply_size,
.fill_reply = wol_fill_reply,
};