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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
34ac17ecbf
It seems I missed that most ethnl_parse_header_dev_get() callers
declare an on-stack struct ethnl_req_info, and that they simply call
dev_put(req_info.dev) when about to return.
Add ethnl_parse_header_dev_put() helper to properly untrack
reference taken by ethnl_parse_header_dev_get().
Fixes: e4b8954074 ("netlink: add net device refcount tracker to struct ethnl_req_info")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include "netlink.h"
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#include "common.h"
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#include "bitset.h"
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struct debug_req_info {
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struct ethnl_req_info base;
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};
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struct debug_reply_data {
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struct ethnl_reply_data base;
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u32 msg_mask;
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};
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#define DEBUG_REPDATA(__reply_base) \
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container_of(__reply_base, struct debug_reply_data, base)
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const struct nla_policy ethnl_debug_get_policy[] = {
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[ETHTOOL_A_DEBUG_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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};
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static int debug_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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struct genl_info *info)
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{
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struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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int ret;
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if (!dev->ethtool_ops->get_msglevel)
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return -EOPNOTSUPP;
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return ret;
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data->msg_mask = dev->ethtool_ops->get_msglevel(dev);
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ethnl_ops_complete(dev);
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return 0;
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}
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static int debug_reply_size(const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
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bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
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return ethnl_bitset32_size(&data->msg_mask, NULL, NETIF_MSG_CLASS_COUNT,
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netif_msg_class_names, compact);
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}
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static int debug_fill_reply(struct sk_buff *skb,
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const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
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bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
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return ethnl_put_bitset32(skb, ETHTOOL_A_DEBUG_MSGMASK, &data->msg_mask,
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NULL, NETIF_MSG_CLASS_COUNT,
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netif_msg_class_names, compact);
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}
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const struct ethnl_request_ops ethnl_debug_request_ops = {
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.request_cmd = ETHTOOL_MSG_DEBUG_GET,
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.reply_cmd = ETHTOOL_MSG_DEBUG_GET_REPLY,
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.hdr_attr = ETHTOOL_A_DEBUG_HEADER,
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.req_info_size = sizeof(struct debug_req_info),
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.reply_data_size = sizeof(struct debug_reply_data),
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.prepare_data = debug_prepare_data,
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.reply_size = debug_reply_size,
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.fill_reply = debug_fill_reply,
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};
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/* DEBUG_SET */
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const struct nla_policy ethnl_debug_set_policy[] = {
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[ETHTOOL_A_DEBUG_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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[ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_NESTED },
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};
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int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info)
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{
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struct ethnl_req_info req_info = {};
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struct nlattr **tb = info->attrs;
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struct net_device *dev;
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bool mod = false;
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u32 msg_mask;
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int ret;
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ret = ethnl_parse_header_dev_get(&req_info,
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tb[ETHTOOL_A_DEBUG_HEADER],
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genl_info_net(info), info->extack,
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true);
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if (ret < 0)
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return ret;
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dev = req_info.dev;
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ret = -EOPNOTSUPP;
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if (!dev->ethtool_ops->get_msglevel || !dev->ethtool_ops->set_msglevel)
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goto out_dev;
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rtnl_lock();
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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goto out_rtnl;
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msg_mask = dev->ethtool_ops->get_msglevel(dev);
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ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT,
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tb[ETHTOOL_A_DEBUG_MSGMASK],
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netif_msg_class_names, info->extack, &mod);
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if (ret < 0 || !mod)
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goto out_ops;
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dev->ethtool_ops->set_msglevel(dev, msg_mask);
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ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
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out_ops:
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ethnl_ops_complete(dev);
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out_rtnl:
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rtnl_unlock();
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out_dev:
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ethnl_parse_header_dev_put(&req_info);
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return ret;
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}
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