xref: /openbmc/linux/net/ethtool/debug.c (revision f946270d)
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