``ETHTOOL_MSG_DEBUG_SET`` set debugging settings
``ETHTOOL_MSG_WOL_GET`` get wake-on-lan settings
``ETHTOOL_MSG_WOL_SET`` set wake-on-lan settings
+ ``ETHTOOL_MSG_FEATURES_GET`` get device features
===================================== ================================
Kernel to userspace:
``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
+ ``ETHTOOL_MSG_FEATURES_GET_REPLY`` device features
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
``WAKE_MAGICSECURE`` mode.
+FEATURES_GET
+============
+
+Gets netdev features like ``ETHTOOL_GFEATURES`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_FEATURES_HEADER`` nested request header
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_FEATURES_HEADER`` nested reply header
+ ``ETHTOOL_A_FEATURES_HW`` bitset dev->hw_features
+ ``ETHTOOL_A_FEATURES_WANTED`` bitset dev->wanted_features
+ ``ETHTOOL_A_FEATURES_ACTIVE`` bitset dev->features
+ ``ETHTOOL_A_FEATURES_NOCHANGE`` bitset NETIF_F_NEVER_CHANGE
+ ==================================== ====== ==========================
+
+Bitmaps in kernel response have the same meaning as bitmaps used in ioctl
+interference but attribute names are different (they are based on
+corresponding members of struct net_device). Legacy "flags" are not provided,
+if userspace needs them (most likely only ethtool for backward compatibility),
+it can calculate their values from related feature bits itself.
+ETHA_FEATURES_HW uses mask consisting of all features recognized by kernel (to
+provide all names when using verbose bitmap format), the other three use no
+mask (simple bit lists).
+
+
Request translation
===================
``ETHTOOL_SRINGPARAM`` n/a
``ETHTOOL_GPAUSEPARAM`` n/a
``ETHTOOL_SPAUSEPARAM`` n/a
- ``ETHTOOL_GRXCSUM`` n/a
+ ``ETHTOOL_GRXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SRXCSUM`` n/a
- ``ETHTOOL_GTXCSUM`` n/a
+ ``ETHTOOL_GTXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_STXCSUM`` n/a
- ``ETHTOOL_GSG`` n/a
+ ``ETHTOOL_GSG`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SSG`` n/a
``ETHTOOL_TEST`` n/a
``ETHTOOL_GSTRINGS`` ``ETHTOOL_MSG_STRSET_GET``
``ETHTOOL_PHYS_ID`` n/a
``ETHTOOL_GSTATS`` n/a
- ``ETHTOOL_GTSO`` n/a
+ ``ETHTOOL_GTSO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_STSO`` n/a
``ETHTOOL_GPERMADDR`` rtnetlink ``RTM_GETLINK``
- ``ETHTOOL_GUFO`` n/a
+ ``ETHTOOL_GUFO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SUFO`` n/a
- ``ETHTOOL_GGSO`` n/a
+ ``ETHTOOL_GGSO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SGSO`` n/a
- ``ETHTOOL_GFLAGS`` n/a
+ ``ETHTOOL_GFLAGS`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFLAGS`` n/a
``ETHTOOL_GPFLAGS`` n/a
``ETHTOOL_SPFLAGS`` n/a
``ETHTOOL_GRXFH`` n/a
``ETHTOOL_SRXFH`` n/a
- ``ETHTOOL_GGRO`` n/a
+ ``ETHTOOL_GGRO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SGRO`` n/a
``ETHTOOL_GRXRINGS`` n/a
``ETHTOOL_GRXCLSRLCNT`` n/a
``ETHTOOL_GSSET_INFO`` ``ETHTOOL_MSG_STRSET_GET``
``ETHTOOL_GRXFHINDIR`` n/a
``ETHTOOL_SRXFHINDIR`` n/a
- ``ETHTOOL_GFEATURES`` n/a
+ ``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFEATURES`` n/a
``ETHTOOL_GCHANNELS`` n/a
``ETHTOOL_SCHANNELS`` n/a
ETHTOOL_MSG_DEBUG_SET,
ETHTOOL_MSG_WOL_GET,
ETHTOOL_MSG_WOL_SET,
+ ETHTOOL_MSG_FEATURES_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
ETHTOOL_MSG_DEBUG_NTF,
ETHTOOL_MSG_WOL_GET_REPLY,
ETHTOOL_MSG_WOL_NTF,
+ ETHTOOL_MSG_FEATURES_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
ETHTOOL_A_WOL_MAX = __ETHTOOL_A_WOL_CNT - 1
};
+/* FEATURES */
+
+enum {
+ ETHTOOL_A_FEATURES_UNSPEC,
+ ETHTOOL_A_FEATURES_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_FEATURES_HW, /* bitset */
+ ETHTOOL_A_FEATURES_WANTED, /* bitset */
+ ETHTOOL_A_FEATURES_ACTIVE, /* bitset */
+ ETHTOOL_A_FEATURES_NOCHANGE, /* bitset */
+
+ /* add new constants above here */
+ __ETHTOOL_A_FEATURES_CNT,
+ ETHTOOL_A_FEATURES_MAX = __ETHTOOL_A_FEATURES_CNT - 1
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
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
+ linkstate.o debug.o wol.o features.o
#include <linux/netdevice.h>
#include <linux/ethtool.h>
+#define ETHTOOL_DEV_FEATURE_WORDS DIV_ROUND_UP(NETDEV_FEATURE_COUNT, 32)
+
/* compose link mode index from speed, type and duplex */
#define ETHTOOL_LINK_MODE(speed, type, duplex) \
ETHTOOL_LINK_MODE_ ## speed ## base ## type ## _ ## duplex ## _BIT
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct features_req_info {
+ struct ethnl_req_info base;
+};
+
+struct features_reply_data {
+ struct ethnl_reply_data base;
+ u32 hw[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 wanted[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 active[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 nochange[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 all[ETHTOOL_DEV_FEATURE_WORDS];
+};
+
+#define FEATURES_REPDATA(__reply_base) \
+ container_of(__reply_base, struct features_reply_data, base)
+
+static const struct nla_policy
+features_get_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
+ [ETHTOOL_A_FEATURES_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_FEATURES_HW] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_WANTED] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_ACTIVE] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_NOCHANGE] = { .type = NLA_REJECT },
+};
+
+static void ethnl_features_to_bitmap32(u32 *dest, netdev_features_t src)
+{
+ unsigned int i;
+
+ for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; i++)
+ dest[i] = src >> (32 * i);
+}
+
+static int features_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct features_reply_data *data = FEATURES_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ netdev_features_t all_features;
+
+ ethnl_features_to_bitmap32(data->hw, dev->hw_features);
+ ethnl_features_to_bitmap32(data->wanted, dev->wanted_features);
+ ethnl_features_to_bitmap32(data->active, dev->features);
+ ethnl_features_to_bitmap32(data->nochange, NETIF_F_NEVER_CHANGE);
+ all_features = GENMASK_ULL(NETDEV_FEATURE_COUNT - 1, 0);
+ ethnl_features_to_bitmap32(data->all, all_features);
+
+ return 0;
+}
+
+static int features_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct features_reply_data *data = FEATURES_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ unsigned int len = 0;
+ int ret;
+
+ ret = ethnl_bitset32_size(data->hw, data->all, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(data->wanted, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(data->active, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(data->nochange, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+
+ return len;
+}
+
+static int features_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct features_reply_data *data = FEATURES_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ int ret;
+
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_HW, data->hw,
+ data->all, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_WANTED, data->wanted,
+ NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_ACTIVE, data->active,
+ NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ return ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_NOCHANGE,
+ data->nochange, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+}
+
+const struct ethnl_request_ops ethnl_features_request_ops = {
+ .request_cmd = ETHTOOL_MSG_FEATURES_GET,
+ .reply_cmd = ETHTOOL_MSG_FEATURES_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_FEATURES_HEADER,
+ .max_attr = ETHTOOL_A_FEATURES_MAX,
+ .req_info_size = sizeof(struct features_req_info),
+ .reply_data_size = sizeof(struct features_reply_data),
+ .request_policy = features_get_policy,
+
+ .prepare_data = features_prepare_data,
+ .reply_size = features_reply_size,
+ .fill_reply = features_fill_reply,
+};
/* Handlers for each ethtool command */
-#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
-
static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
{
struct ethtool_gfeatures cmd = {
[ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops,
[ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops,
[ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops,
+ [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_wol,
},
+ {
+ .cmd = ETHTOOL_MSG_FEATURES_GET,
+ .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[] = {
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;
+extern const struct ethnl_request_ops ethnl_features_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);
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