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// 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,
};
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