3d2b847fb9
Implement LINKSTATE_GET netlink request to get link state information. At the moment, only link up flag as provided by ETHTOOL_GLINK ioctl command is returned. LINKSTATE_GET request can be used with NLM_F_DUMP (without device identification) to request the information for all devices in current network namespace providing the data. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
75 lines
2 KiB
C
75 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
#include "netlink.h"
|
|
#include "common.h"
|
|
|
|
struct linkstate_req_info {
|
|
struct ethnl_req_info base;
|
|
};
|
|
|
|
struct linkstate_reply_data {
|
|
struct ethnl_reply_data base;
|
|
int link;
|
|
};
|
|
|
|
#define LINKSTATE_REPDATA(__reply_base) \
|
|
container_of(__reply_base, struct linkstate_reply_data, base)
|
|
|
|
static const struct nla_policy
|
|
linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1] = {
|
|
[ETHTOOL_A_LINKSTATE_UNSPEC] = { .type = NLA_REJECT },
|
|
[ETHTOOL_A_LINKSTATE_HEADER] = { .type = NLA_NESTED },
|
|
[ETHTOOL_A_LINKSTATE_LINK] = { .type = NLA_REJECT },
|
|
};
|
|
|
|
static int linkstate_prepare_data(const struct ethnl_req_info *req_base,
|
|
struct ethnl_reply_data *reply_base,
|
|
struct genl_info *info)
|
|
{
|
|
struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base);
|
|
struct net_device *dev = reply_base->dev;
|
|
int ret;
|
|
|
|
ret = ethnl_ops_begin(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->link = __ethtool_get_link(dev);
|
|
ethnl_ops_complete(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int linkstate_reply_size(const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
return nla_total_size(sizeof(u8)) /* LINKSTATE_LINK */
|
|
+ 0;
|
|
}
|
|
|
|
static int linkstate_fill_reply(struct sk_buff *skb,
|
|
const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base);
|
|
|
|
if (data->link >= 0 &&
|
|
nla_put_u8(skb, ETHTOOL_A_LINKSTATE_LINK, !!data->link))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct ethnl_request_ops ethnl_linkstate_request_ops = {
|
|
.request_cmd = ETHTOOL_MSG_LINKSTATE_GET,
|
|
.reply_cmd = ETHTOOL_MSG_LINKSTATE_GET_REPLY,
|
|
.hdr_attr = ETHTOOL_A_LINKSTATE_HEADER,
|
|
.max_attr = ETHTOOL_A_LINKSTATE_MAX,
|
|
.req_info_size = sizeof(struct linkstate_req_info),
|
|
.reply_data_size = sizeof(struct linkstate_reply_data),
|
|
.request_policy = linkstate_get_policy,
|
|
|
|
.prepare_data = linkstate_prepare_data,
|
|
.reply_size = linkstate_reply_size,
|
|
.fill_reply = linkstate_fill_reply,
|
|
};
|