f946270d05
We had a number of bugs in the past because developers forgot to fully test dumps, which pass NULL as info to .prepare_data. .prepare_data implementations would try to access info->extack leading to a null-deref. Now that dumps and notifications can access struct genl_info we can pass it in, and remove the info null checks. Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com> # pause Reviewed-by: Jiri Pirko <jiri@nvidia.com> Link: https://lore.kernel.org/r/20230814214723.2924989-11-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
118 lines
3.1 KiB
C
118 lines
3.1 KiB
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,
|
|
};
|