1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include "netlink.h"
4 #include "common.h"
5 #include "bitset.h"
6
7 struct debug_req_info {
8 struct ethnl_req_info base;
9 };
10
11 struct 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
19 const struct nla_policy ethnl_debug_get_policy[] = {
20 [ETHTOOL_A_DEBUG_HEADER] =
21 NLA_POLICY_NESTED(ethnl_header_policy),
22 };
23
debug_prepare_data(const struct ethnl_req_info * req_base,struct ethnl_reply_data * reply_base,const struct genl_info * info)24 static int debug_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 const 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
debug_reply_size(const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)44 static 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
debug_fill_reply(struct sk_buff * skb,const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)54 static 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
66 /* DEBUG_SET */
67
68 const struct nla_policy ethnl_debug_set_policy[] = {
69 [ETHTOOL_A_DEBUG_HEADER] =
70 NLA_POLICY_NESTED(ethnl_header_policy),
71 [ETHTOOL_A_DEBUG_MSGMASK] = { .type = NLA_NESTED },
72 };
73
74 static int
ethnl_set_debug_validate(struct ethnl_req_info * req_info,struct genl_info * info)75 ethnl_set_debug_validate(struct ethnl_req_info *req_info,
76 struct genl_info *info)
77 {
78 const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
79
80 return ops->get_msglevel && ops->set_msglevel ? 1 : -EOPNOTSUPP;
81 }
82
83 static int
ethnl_set_debug(struct ethnl_req_info * req_info,struct genl_info * info)84 ethnl_set_debug(struct ethnl_req_info *req_info, struct genl_info *info)
85 {
86 struct net_device *dev = req_info->dev;
87 struct nlattr **tb = info->attrs;
88 bool mod = false;
89 u32 msg_mask;
90 int ret;
91
92 msg_mask = dev->ethtool_ops->get_msglevel(dev);
93 ret = ethnl_update_bitset32(&msg_mask, NETIF_MSG_CLASS_COUNT,
94 tb[ETHTOOL_A_DEBUG_MSGMASK],
95 netif_msg_class_names, info->extack, &mod);
96 if (ret < 0 || !mod)
97 return ret;
98
99 dev->ethtool_ops->set_msglevel(dev, msg_mask);
100 return 1;
101 }
102
103 const struct ethnl_request_ops ethnl_debug_request_ops = {
104 .request_cmd = ETHTOOL_MSG_DEBUG_GET,
105 .reply_cmd = ETHTOOL_MSG_DEBUG_GET_REPLY,
106 .hdr_attr = ETHTOOL_A_DEBUG_HEADER,
107 .req_info_size = sizeof(struct debug_req_info),
108 .reply_data_size = sizeof(struct debug_reply_data),
109
110 .prepare_data = debug_prepare_data,
111 .reply_size = debug_reply_size,
112 .fill_reply = debug_fill_reply,
113
114 .set_validate = ethnl_set_debug_validate,
115 .set = ethnl_set_debug,
116 .set_ntf_cmd = ETHTOOL_MSG_DEBUG_NTF,
117 };
118