mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 08:14:15 +08:00
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>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright 2021 NXP
|
|
*/
|
|
#include "netlink.h"
|
|
#include "common.h"
|
|
|
|
struct phc_vclocks_req_info {
|
|
struct ethnl_req_info base;
|
|
};
|
|
|
|
struct phc_vclocks_reply_data {
|
|
struct ethnl_reply_data base;
|
|
int num;
|
|
int *index;
|
|
};
|
|
|
|
#define PHC_VCLOCKS_REPDATA(__reply_base) \
|
|
container_of(__reply_base, struct phc_vclocks_reply_data, base)
|
|
|
|
const struct nla_policy ethnl_phc_vclocks_get_policy[] = {
|
|
[ETHTOOL_A_PHC_VCLOCKS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
|
|
};
|
|
|
|
static int phc_vclocks_prepare_data(const struct ethnl_req_info *req_base,
|
|
struct ethnl_reply_data *reply_base,
|
|
const struct genl_info *info)
|
|
{
|
|
struct phc_vclocks_reply_data *data = PHC_VCLOCKS_REPDATA(reply_base);
|
|
struct net_device *dev = reply_base->dev;
|
|
int ret;
|
|
|
|
ret = ethnl_ops_begin(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->num = ethtool_get_phc_vclocks(dev, &data->index);
|
|
ethnl_ops_complete(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int phc_vclocks_reply_size(const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
const struct phc_vclocks_reply_data *data =
|
|
PHC_VCLOCKS_REPDATA(reply_base);
|
|
int len = 0;
|
|
|
|
if (data->num > 0) {
|
|
len += nla_total_size(sizeof(u32));
|
|
len += nla_total_size(sizeof(s32) * data->num);
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
static int phc_vclocks_fill_reply(struct sk_buff *skb,
|
|
const struct ethnl_req_info *req_base,
|
|
const struct ethnl_reply_data *reply_base)
|
|
{
|
|
const struct phc_vclocks_reply_data *data =
|
|
PHC_VCLOCKS_REPDATA(reply_base);
|
|
|
|
if (data->num <= 0)
|
|
return 0;
|
|
|
|
if (nla_put_u32(skb, ETHTOOL_A_PHC_VCLOCKS_NUM, data->num) ||
|
|
nla_put(skb, ETHTOOL_A_PHC_VCLOCKS_INDEX,
|
|
sizeof(s32) * data->num, data->index))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void phc_vclocks_cleanup_data(struct ethnl_reply_data *reply_base)
|
|
{
|
|
const struct phc_vclocks_reply_data *data =
|
|
PHC_VCLOCKS_REPDATA(reply_base);
|
|
|
|
kfree(data->index);
|
|
}
|
|
|
|
const struct ethnl_request_ops ethnl_phc_vclocks_request_ops = {
|
|
.request_cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET,
|
|
.reply_cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY,
|
|
.hdr_attr = ETHTOOL_A_PHC_VCLOCKS_HEADER,
|
|
.req_info_size = sizeof(struct phc_vclocks_req_info),
|
|
.reply_data_size = sizeof(struct phc_vclocks_reply_data),
|
|
|
|
.prepare_data = phc_vclocks_prepare_data,
|
|
.reply_size = phc_vclocks_reply_size,
|
|
.fill_reply = phc_vclocks_fill_reply,
|
|
.cleanup_data = phc_vclocks_cleanup_data,
|
|
};
|