forked from mirrors/linux
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>
117 lines
3.1 KiB
C
117 lines
3.1 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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const 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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/* 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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static int
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ethnl_set_debug_validate(struct ethnl_req_info *req_info,
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struct genl_info *info)
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{
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const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
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return ops->get_msglevel && ops->set_msglevel ? 1 : -EOPNOTSUPP;
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}
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static int
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ethnl_set_debug(struct ethnl_req_info *req_info, struct genl_info *info)
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{
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struct net_device *dev = req_info->dev;
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struct nlattr **tb = info->attrs;
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bool mod = false;
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u32 msg_mask;
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int ret;
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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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return ret;
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dev->ethtool_ops->set_msglevel(dev, msg_mask);
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return 1;
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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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.set_validate = ethnl_set_debug_validate,
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.set = ethnl_set_debug,
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.set_ntf_cmd = ETHTOOL_MSG_DEBUG_NTF,
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};
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