projects/linux·blob v6.2 · refs

128 lines · 3.3 KiB

1// SPDX-License-Identifier: GPL-2.0-only
2
3#include "netlink.h"
4#include "common.h"
5#include "bitset.h"
6
7struct debug_req_info {
8 struct ethnl_req_info base;
9};
10
11struct debug_reply_data {
12 struct ethnl_reply_data base;
13 u32 msg_mask;
14};
15
16#define DEBUG_REPDATA(__reply_base) \
17 container_of(__reply_base, struct debug_reply_data, base)
18
19const struct nla_policy ethnl_debug_get_policy[] = {
20 [ETHTOOL_A_DEBUG_HEADER] =
21 NLA_POLICY_NESTED(ethnl_header_policy),
22};
23
24static int debug_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 struct genl_info *info)
27{
28 struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
29 struct net_device *dev = reply_base->dev;
30 int ret;
31
32 if (!dev->ethtool_ops->get_msglevel)
33 return -EOPNOTSUPP;
34
35 ret = ethnl_ops_begin(dev);
36 if (ret < 0)
37 return ret;
38 data->msg_mask = dev->ethtool_ops->get_msglevel(dev);
39 ethnl_ops_complete(dev);
40
41 return 0;
42}
43
44static int debug_reply_size(const struct ethnl_req_info *req_base,
45 const struct ethnl_reply_data *reply_base)
46{
47 const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
48 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
49
50 return ethnl_bitset32_size(&data->msg_mask, NULL, NETIF_MSG_CLASS_COUNT,
51 netif_msg_class_names, compact);
52}
53
54static int debug_fill_reply(struct sk_buff *skb,
55 const struct ethnl_req_info *req_base,
56 const struct ethnl_reply_data *reply_base)
57{
58 const struct debug_reply_data *data = DEBUG_REPDATA(reply_base);
59 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
60
61 return ethnl_put_bitset32(skb, ETHTOOL_A_DEBUG_MSGMASK, &data->msg_mask,
62 NULL, NETIF_MSG_CLASS_COUNT,
63 netif_msg_class_names, compact);
64}
65
66const struct ethnl_request_ops ethnl_debug_request_ops = {
67 .request_cmd = ETHTOOL_MSG_DEBUG_GET,
68 .reply_cmd = ETHTOOL_MSG_DEBUG_GET_REPLY,
69 .hdr_attr = ETHTOOL_A_DEBUG_HEADER,
70 .req_info_size = sizeof(struct debug_req_info),
71 .reply_data_size = sizeof(struct debug_reply_data),
72
73 .prepare_data = debug_prepare_data,
74 .reply_size = debug_reply_size,
75 .fill_reply = debug_fill_reply,
76};
77
78/* DEBUG_SET */
79
80const struct nla_policy ethnl_debug_set_policy[] = {
81 [ETHTOOL_A_DEBUG_HEADER] =
82 NLA_POLICY_NESTED(ethnl_header_policy),
83 [ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_NESTED },
84};
85
86int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info)
87{
88 struct ethnl_req_info req_info = {};
89 struct nlattr **tb = info->attrs;
90 struct net_device *dev;
91 bool mod = false;
92 u32 msg_mask;
93 int ret;
94
95 ret = ethnl_parse_header_dev_get(&req_info,
96 tb[ETHTOOL_A_DEBUG_HEADER],
97 genl_info_net(info), info->extack,
98 true);
99 if (ret < 0)
100 return ret;
101 dev = req_info.dev;
102 ret = -EOPNOTSUPP;
103 if (!dev->ethtool_ops->get_msglevel || !dev->ethtool_ops->set_msglevel)
104 goto out_dev;
105
106 rtnl_lock();
107 ret = ethnl_ops_begin(dev);
108 if (ret < 0)
109 goto out_rtnl;
110
111 msg_mask = dev->ethtool_ops->get_msglevel(dev);
112 ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT,
113 tb[ETHTOOL_A_DEBUG_MSGMASK],
114 netif_msg_class_names, info->extack, &mod);
115 if (ret < 0 || !mod)
116 goto out_ops;
117
118 dev->ethtool_ops->set_msglevel(dev, msg_mask);
119 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
120
121out_ops:
122 ethnl_ops_complete(dev);
123out_rtnl:
124 rtnl_unlock();
125out_dev:
126 ethnl_parse_header_dev_put(&req_info);
127 return ret;
128}