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ethtool: provide message mask with DEBUG_GET request

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Implement DEBUG_GET request to get debugging settings for a device. At the
moment, only message mask corresponding to message level as reported by
ETHTOOL_GMSGLVL ioctl request is provided. (It is called message level in
ioctl interface but almost all drivers interpret it as a bit mask.)

As part of the implementation, provide symbolic names for message mask bits
as ETH_SS_MSG_CLASSES string set.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kubecek
2020-01-26 23:11:04 +01:00
committed by David S. Miller
parent d2c4b444fd
commit 6a94b8ccf6
11 changed files with 205 additions and 17 deletions
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80
net/ethtool/debug.c Normal file
View File

@@ -0,0 +1,80 @@
// 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)
static const struct nla_policy
debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1] = {
[ETHTOOL_A_DEBUG_UNSPEC] = { .type = NLA_REJECT },
[ETHTOOL_A_DEBUG_HEADER] = { .type = NLA_NESTED },
[ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_REJECT },
};
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,
.max_attr = ETHTOOL_A_DEBUG_MAX,
.req_info_size = sizeof(struct debug_req_info),
.reply_data_size = sizeof(struct debug_reply_data),
.request_policy = debug_get_policy,
.prepare_data = debug_prepare_data,
.reply_size = debug_reply_size,
.fill_reply = debug_fill_reply,
};