``ETHTOOL_MSG_WOL_SET`` set wake-on-lan settings
``ETHTOOL_MSG_FEATURES_GET`` get device features
``ETHTOOL_MSG_FEATURES_SET`` set device features
+ ``ETHTOOL_MSG_PRIVFLAGS_GET`` get private flags
===================================== ================================
Kernel to userspace:
``ETHTOOL_MSG_FEATURES_GET_REPLY`` device features
``ETHTOOL_MSG_FEATURES_SET_REPLY`` optional reply to FEATURES_SET
``ETHTOOL_MSG_FEATURES_NTF`` netdev features notification
+ ``ETHTOOL_MSG_PRIVFLAGS_GET_REPLY`` private flags
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
or netdev_change_features().
+PRIVFLAGS_GET
+=============
+
+Gets private flags like ``ETHTOOL_GPFLAGS`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested request header
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested reply header
+ ``ETHTOOL_A_PRIVFLAGS_FLAGS`` bitset private flags
+ ==================================== ====== ==========================
+
+``ETHTOOL_A_PRIVFLAGS_FLAGS`` is a bitset with values of device private flags.
+These flags are defined by driver, their number and names (and also meaning)
+are device dependent. For compact bitset format, names can be retrieved as
+``ETH_SS_PRIV_FLAGS`` string set. If verbose bitset format is requested,
+response uses all private flags supported by the device as mask so that client
+gets the full information without having to fetch the string set with names.
+
+
Request translation
===================
``ETHTOOL_SGSO`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GFLAGS`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFLAGS`` ``ETHTOOL_MSG_FEATURES_SET``
- ``ETHTOOL_GPFLAGS`` n/a
+ ``ETHTOOL_GPFLAGS`` ``ETHTOOL_MSG_PRIVFLAGS_GET``
``ETHTOOL_SPFLAGS`` n/a
``ETHTOOL_GRXFH`` n/a
``ETHTOOL_SRXFH`` n/a
ETHTOOL_MSG_WOL_SET,
ETHTOOL_MSG_FEATURES_GET,
ETHTOOL_MSG_FEATURES_SET,
+ ETHTOOL_MSG_PRIVFLAGS_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
ETHTOOL_MSG_FEATURES_GET_REPLY,
ETHTOOL_MSG_FEATURES_SET_REPLY,
ETHTOOL_MSG_FEATURES_NTF,
+ ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
ETHTOOL_A_FEATURES_MAX = __ETHTOOL_A_FEATURES_CNT - 1
};
+/* PRIVFLAGS */
+
+enum {
+ ETHTOOL_A_PRIVFLAGS_UNSPEC,
+ ETHTOOL_A_PRIVFLAGS_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_PRIVFLAGS_FLAGS, /* bitset */
+
+ /* add new constants above here */
+ __ETHTOOL_A_PRIVFLAGS_CNT,
+ ETHTOOL_A_PRIVFLAGS_MAX = __ETHTOOL_A_PRIVFLAGS_CNT - 1
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct privflags_req_info {
+ struct ethnl_req_info base;
+};
+
+struct privflags_reply_data {
+ struct ethnl_reply_data base;
+ const char (*priv_flag_names)[ETH_GSTRING_LEN];
+ unsigned int n_priv_flags;
+ u32 priv_flags;
+};
+
+#define PRIVFLAGS_REPDATA(__reply_base) \
+ container_of(__reply_base, struct privflags_reply_data, base)
+
+static const struct nla_policy
+privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
+ [ETHTOOL_A_PRIVFLAGS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_PRIVFLAGS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_PRIVFLAGS_FLAGS] = { .type = NLA_REJECT },
+};
+
+static int ethnl_get_priv_flags_info(struct net_device *dev,
+ unsigned int *count,
+ const char (**names)[ETH_GSTRING_LEN])
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ int nflags;
+
+ nflags = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
+ if (nflags < 0)
+ return nflags;
+
+ if (names) {
+ *names = kcalloc(nflags, ETH_GSTRING_LEN, GFP_KERNEL);
+ if (!*names)
+ return -ENOMEM;
+ ops->get_strings(dev, ETH_SS_PRIV_FLAGS, (u8 *)*names);
+ }
+
+ /* We can pass more than 32 private flags to userspace via netlink but
+ * we cannot get more with ethtool_ops::get_priv_flags(). Note that we
+ * must not adjust nflags before allocating the space for flag names
+ * as the buffer must be large enough for all flags.
+ */
+ if (WARN_ONCE(nflags > 32,
+ "device %s reports more than 32 private flags (%d)\n",
+ netdev_name(dev), nflags))
+ nflags = 32;
+ *count = nflags;
+
+ return 0;
+}
+
+static int privflags_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ const char (*names)[ETH_GSTRING_LEN];
+ const struct ethtool_ops *ops;
+ unsigned int nflags;
+ int ret;
+
+ ops = dev->ethtool_ops;
+ if (!ops->get_priv_flags || !ops->get_sset_count || !ops->get_strings)
+ return -EOPNOTSUPP;
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+
+ ret = ethnl_get_priv_flags_info(dev, &nflags, &names);
+ if (ret < 0)
+ goto out_ops;
+ data->priv_flags = ops->get_priv_flags(dev);
+ data->priv_flag_names = names;
+ data->n_priv_flags = nflags;
+
+out_ops:
+ ethnl_ops_complete(dev);
+ return ret;
+}
+
+static int privflags_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ const u32 all_flags = ~(u32)0 >> (32 - data->n_priv_flags);
+
+ return ethnl_bitset32_size(&data->priv_flags, &all_flags,
+ data->n_priv_flags,
+ data->priv_flag_names, compact);
+}
+
+static int privflags_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ const u32 all_flags = ~(u32)0 >> (32 - data->n_priv_flags);
+
+ return ethnl_put_bitset32(skb, ETHTOOL_A_PRIVFLAGS_FLAGS,
+ &data->priv_flags, &all_flags,
+ data->n_priv_flags, data->priv_flag_names,
+ compact);
+}
+
+static void privflags_cleanup_data(struct ethnl_reply_data *reply_data)
+{
+ struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_data);
+
+ kfree(data->priv_flag_names);
+}
+
+const struct ethnl_request_ops ethnl_privflags_request_ops = {
+ .request_cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
+ .reply_cmd = ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_PRIVFLAGS_HEADER,
+ .max_attr = ETHTOOL_A_PRIVFLAGS_MAX,
+ .req_info_size = sizeof(struct privflags_req_info),
+ .reply_data_size = sizeof(struct privflags_reply_data),
+ .request_policy = privflags_get_policy,
+
+ .prepare_data = privflags_prepare_data,
+ .reply_size = privflags_reply_size,
+ .fill_reply = privflags_fill_reply,
+ .cleanup_data = privflags_cleanup_data,
+};
projects / platform / kernel / linux-rpi.git / commitdiff