linux/net/ethtool/linkstate.c
Jakub Kicinski 329d9c333e ethtool: link up ethnl_header_policy as a nested policy
To get the most out of parsing by the core, and to allow dumping
full policies we need to specify which policy applies to nested
attrs. For headers it's ethnl_header_policy.

$ sed -i 's@\(ETHTOOL_A_.*HEADER\].*=\) { .type = NLA_NESTED },@\1\n\t\tNLA_POLICY_NESTED(ethnl_header_policy),@' net/ethtool/*

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06 06:25:55 -07:00

183 lines
4.4 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
#include "netlink.h"
#include "common.h"
#include <linux/phy.h>
struct linkstate_req_info {
struct ethnl_req_info base;
};
struct linkstate_reply_data {
struct ethnl_reply_data base;
int link;
int sqi;
int sqi_max;
bool link_ext_state_provided;
struct ethtool_link_ext_state_info ethtool_link_ext_state_info;
};
#define LINKSTATE_REPDATA(__reply_base) \
container_of(__reply_base, struct linkstate_reply_data, base)
const struct nla_policy ethnl_linkstate_get_policy[] = {
[ETHTOOL_A_LINKSTATE_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int linkstate_get_sqi(struct net_device *dev)
{
struct phy_device *phydev = dev->phydev;
int ret;
if (!phydev)
return -EOPNOTSUPP;
mutex_lock(&phydev->lock);
if (!phydev->drv || !phydev->drv->get_sqi)
ret = -EOPNOTSUPP;
else
ret = phydev->drv->get_sqi(phydev);
mutex_unlock(&phydev->lock);
return ret;
}
static int linkstate_get_sqi_max(struct net_device *dev)
{
struct phy_device *phydev = dev->phydev;
int ret;
if (!phydev)
return -EOPNOTSUPP;
mutex_lock(&phydev->lock);
if (!phydev->drv || !phydev->drv->get_sqi_max)
ret = -EOPNOTSUPP;
else
ret = phydev->drv->get_sqi_max(phydev);
mutex_unlock(&phydev->lock);
return ret;
};
static int linkstate_get_link_ext_state(struct net_device *dev,
struct linkstate_reply_data *data)
{
int err;
if (!dev->ethtool_ops->get_link_ext_state)
return -EOPNOTSUPP;
err = dev->ethtool_ops->get_link_ext_state(dev, &data->ethtool_link_ext_state_info);
if (err)
return err;
data->link_ext_state_provided = true;
return 0;
}
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);
ret = linkstate_get_sqi(dev);
if (ret < 0 && ret != -EOPNOTSUPP)
goto out;
data->sqi = ret;
ret = linkstate_get_sqi_max(dev);
if (ret < 0 && ret != -EOPNOTSUPP)
goto out;
data->sqi_max = ret;
if (dev->flags & IFF_UP) {
ret = linkstate_get_link_ext_state(dev, data);
if (ret < 0 && ret != -EOPNOTSUPP && ret != -ENODATA)
goto out;
}
ret = 0;
out:
ethnl_ops_complete(dev);
return ret;
}
static int linkstate_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base);
int len;
len = nla_total_size(sizeof(u8)) /* LINKSTATE_LINK */
+ 0;
if (data->sqi != -EOPNOTSUPP)
len += nla_total_size(sizeof(u32));
if (data->sqi_max != -EOPNOTSUPP)
len += nla_total_size(sizeof(u32));
if (data->link_ext_state_provided)
len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_STATE */
if (data->ethtool_link_ext_state_info.__link_ext_substate)
len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_SUBSTATE */
return len;
}
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;
if (data->sqi != -EOPNOTSUPP &&
nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI, data->sqi))
return -EMSGSIZE;
if (data->sqi_max != -EOPNOTSUPP &&
nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI_MAX, data->sqi_max))
return -EMSGSIZE;
if (data->link_ext_state_provided) {
if (nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_STATE,
data->ethtool_link_ext_state_info.link_ext_state))
return -EMSGSIZE;
if (data->ethtool_link_ext_state_info.__link_ext_substate &&
nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_SUBSTATE,
data->ethtool_link_ext_state_info.__link_ext_substate))
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,
.req_info_size = sizeof(struct linkstate_req_info),
.reply_data_size = sizeof(struct linkstate_reply_data),
.prepare_data = linkstate_prepare_data,
.reply_size = linkstate_reply_size,
.fill_reply = linkstate_fill_reply,
};