iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ethtool: provide link state with LINKSTATE_GET request

Browse Source 
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>
This commit is contained in:
Michal Kubecek
2019-12-27 15:56:23 +01:00
committed by David S. Miller
parent 1b1b1847c8
commit 3d2b847fb9
9 changed files with 146 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
net/ethtool/linkstate.c Normal file
View File

@ -0,0 +1,74 @@
// 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,
};