Quelle debug.c Sprache: C

// 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,
         const 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);
}

/* 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 },
};

static int
ethnl_set_debug_validate(struct ethnl_req_info *req_info,
    struct genl_info *info)
{
const struct ethtool_ops *ops = req_info->dev->ethtool_ops;

return ops->get_msglevel && ops->set_msglevel ? 1 : -EOPNOTSUPP;
}

static int
ethnl_set_debug(struct ethnl_req_info *req_info, struct genl_info *info)
{
struct net_device *dev = req_info->dev;
struct nlattr **tb = info->attrs;
bool mod = false;
u32 msg_mask;
int ret;

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)
  return ret;

dev->ethtool_ops->set_msglevel(dev, msg_mask);
return 1;
}

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,

.set_validate  = ethnl_set_debug_validate,
.set   = ethnl_set_debug,
.set_ntf_cmd  = ETHTOOL_MSG_DEBUG_NTF,
};

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