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ethtool: provide link settings with LINKINFO_GET request
Implement LINKINFO_GET netlink request to get basic link settings provided by ETHTOOL_GLINKSETTINGS and ETHTOOL_GSET ioctl commands. This request provides settings not directly related to autonegotiation and link mode selection: physical port, phy MDIO address, MDI(-X) status, MDI(-X) control and transceiver. LINKINFO_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>
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Michal Kubecek
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David S. Miller
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Dec 28, 2019
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Original file line number | Diff line number | Diff line change |
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// SPDX-License-Identifier: GPL-2.0-only | ||
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#include "netlink.h" | ||
#include "common.h" | ||
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struct linkinfo_req_info { | ||
struct ethnl_req_info base; | ||
}; | ||
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struct linkinfo_reply_data { | ||
struct ethnl_reply_data base; | ||
struct ethtool_link_ksettings ksettings; | ||
struct ethtool_link_settings *lsettings; | ||
}; | ||
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#define LINKINFO_REPDATA(__reply_base) \ | ||
container_of(__reply_base, struct linkinfo_reply_data, base) | ||
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static const struct nla_policy | ||
linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1] = { | ||
[ETHTOOL_A_LINKINFO_UNSPEC] = { .type = NLA_REJECT }, | ||
[ETHTOOL_A_LINKINFO_HEADER] = { .type = NLA_NESTED }, | ||
[ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_REJECT }, | ||
[ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_REJECT }, | ||
[ETHTOOL_A_LINKINFO_TP_MDIX] = { .type = NLA_REJECT }, | ||
[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_REJECT }, | ||
[ETHTOOL_A_LINKINFO_TRANSCEIVER] = { .type = NLA_REJECT }, | ||
}; | ||
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static int linkinfo_prepare_data(const struct ethnl_req_info *req_base, | ||
struct ethnl_reply_data *reply_base, | ||
struct genl_info *info) | ||
{ | ||
struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base); | ||
struct net_device *dev = reply_base->dev; | ||
int ret; | ||
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data->lsettings = &data->ksettings.base; | ||
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ret = ethnl_ops_begin(dev); | ||
if (ret < 0) | ||
return ret; | ||
ret = __ethtool_get_link_ksettings(dev, &data->ksettings); | ||
if (ret < 0 && info) | ||
GENL_SET_ERR_MSG(info, "failed to retrieve link settings"); | ||
ethnl_ops_complete(dev); | ||
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return ret; | ||
} | ||
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static int linkinfo_reply_size(const struct ethnl_req_info *req_base, | ||
const struct ethnl_reply_data *reply_base) | ||
{ | ||
return nla_total_size(sizeof(u8)) /* LINKINFO_PORT */ | ||
+ nla_total_size(sizeof(u8)) /* LINKINFO_PHYADDR */ | ||
+ nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX */ | ||
+ nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX_CTRL */ | ||
+ nla_total_size(sizeof(u8)) /* LINKINFO_TRANSCEIVER */ | ||
+ 0; | ||
} | ||
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static int linkinfo_fill_reply(struct sk_buff *skb, | ||
const struct ethnl_req_info *req_base, | ||
const struct ethnl_reply_data *reply_base) | ||
{ | ||
const struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base); | ||
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if (nla_put_u8(skb, ETHTOOL_A_LINKINFO_PORT, data->lsettings->port) || | ||
nla_put_u8(skb, ETHTOOL_A_LINKINFO_PHYADDR, | ||
data->lsettings->phy_address) || | ||
nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX, | ||
data->lsettings->eth_tp_mdix) || | ||
nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX_CTRL, | ||
data->lsettings->eth_tp_mdix_ctrl) || | ||
nla_put_u8(skb, ETHTOOL_A_LINKINFO_TRANSCEIVER, | ||
data->lsettings->transceiver)) | ||
return -EMSGSIZE; | ||
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return 0; | ||
} | ||
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const struct ethnl_request_ops ethnl_linkinfo_request_ops = { | ||
.request_cmd = ETHTOOL_MSG_LINKINFO_GET, | ||
.reply_cmd = ETHTOOL_MSG_LINKINFO_GET_REPLY, | ||
.hdr_attr = ETHTOOL_A_LINKINFO_HEADER, | ||
.max_attr = ETHTOOL_A_LINKINFO_MAX, | ||
.req_info_size = sizeof(struct linkinfo_req_info), | ||
.reply_data_size = sizeof(struct linkinfo_reply_data), | ||
.request_policy = linkinfo_get_policy, | ||
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.prepare_data = linkinfo_prepare_data, | ||
.reply_size = linkinfo_reply_size, | ||
.fill_reply = linkinfo_fill_reply, | ||
}; |
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