debug.c
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// SPDX-License-Identifier: GPL-2.0-only
#include "netlink.h"
#include "common.h"
#include "bitset.h"
struct debug_req_info {
struct ethnl_req_info base;
};
struct debug_reply_data {
struct ethnl_reply_data base;
u32 msg_mask;
};
#define DEBUG_REPDATA(__reply_base) \
container_of(__reply_base, struct debug_reply_data, base)
const struct nla_policy ethnl_debug_get_policy[] = {
[ETHTOOL_A_DEBUG_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int debug_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
int ret;
if (!dev->ethtool_ops->get_msglevel)
return -EOPNOTSUPP;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
data->msg_mask = dev->ethtool_ops->get_msglevel(dev);
ethnl_ops_complete(dev);
return 0;
}
static int debug_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
return ethnl_bitset32_size(&data->msg_mask, NULL, NETIF_MSG_CLASS_COUNT,
netif_msg_class_names, compact);
}
static int debug_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
return ethnl_put_bitset32(skb, ETHTOOL_A_DEBUG_MSGMASK, &data->msg_mask,
NULL, NETIF_MSG_CLASS_COUNT,
netif_msg_class_names, compact);
}
const struct ethnl_request_ops ethnl_debug_request_ops = {
.request_cmd = ETHTOOL_MSG_DEBUG_GET,
.reply_cmd = ETHTOOL_MSG_DEBUG_GET_REPLY,
.hdr_attr = ETHTOOL_A_DEBUG_HEADER,
.req_info_size = sizeof(struct debug_req_info),
.reply_data_size = sizeof(struct debug_reply_data),
.prepare_data = debug_prepare_data,
.reply_size = debug_reply_size,
.fill_reply = debug_fill_reply,
};
/* DEBUG_SET */
const struct nla_policy ethnl_debug_set_policy[] = {
[ETHTOOL_A_DEBUG_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_NESTED },
};
int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info)
{
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
struct net_device *dev;
bool mod = false;
u32 msg_mask;
int ret;
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_DEBUG_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
dev = req_info.dev;
ret = -EOPNOTSUPP;
if (!dev->ethtool_ops->get_msglevel || !dev->ethtool_ops->set_msglevel)
goto out_dev;
rtnl_lock();
ret = ethnl_ops_begin(dev);
if (ret < 0)
goto out_rtnl;
msg_mask = dev->ethtool_ops->get_msglevel(dev);
ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT,
tb[ETHTOOL_A_DEBUG_MSGMASK],
netif_msg_class_names, info->extack, &mod);
if (ret < 0 || !mod)
goto out_ops;
dev->ethtool_ops->set_msglevel(dev, msg_mask);
ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
out_ops:
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
out_dev:
dev_put(dev);
return ret;
}