1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include <linux/net_tstamp.h>
4
5 #include "netlink.h"
6 #include "common.h"
7 #include "bitset.h"
8
9 struct tsinfo_req_info {
10 struct ethnl_req_info base;
11 };
12
13 struct tsinfo_reply_data {
14 struct ethnl_reply_data base;
15 struct kernel_ethtool_ts_info ts_info;
16 struct ethtool_ts_stats stats;
17 };
18
19 #define TSINFO_REPDATA(__reply_base) \
20 container_of(__reply_base, struct tsinfo_reply_data, base)
21
22 #define ETHTOOL_TS_STAT_CNT \
23 (__ETHTOOL_A_TS_STAT_CNT - (ETHTOOL_A_TS_STAT_UNSPEC + 1))
24
25 const struct nla_policy ethnl_tsinfo_get_policy[] = {
26 [ETHTOOL_A_TSINFO_HEADER] =
27 NLA_POLICY_NESTED(ethnl_header_policy_stats),
28 };
29
tsinfo_prepare_data(const struct ethnl_req_info * req_base,struct ethnl_reply_data * reply_base,const struct genl_info * info)30 static int tsinfo_prepare_data(const struct ethnl_req_info *req_base,
31 struct ethnl_reply_data *reply_base,
32 const struct genl_info *info)
33 {
34 struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
35 struct net_device *dev = reply_base->dev;
36 int ret;
37
38 ret = ethnl_ops_begin(dev);
39 if (ret < 0)
40 return ret;
41 if (req_base->flags & ETHTOOL_FLAG_STATS) {
42 ethtool_stats_init((u64 *)&data->stats,
43 sizeof(data->stats) / sizeof(u64));
44 if (dev->ethtool_ops->get_ts_stats)
45 dev->ethtool_ops->get_ts_stats(dev, &data->stats);
46 }
47 ret = __ethtool_get_ts_info(dev, &data->ts_info);
48 ethnl_ops_complete(dev);
49
50 return ret;
51 }
52
tsinfo_reply_size(const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)53 static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
54 const struct ethnl_reply_data *reply_base)
55 {
56 const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
57 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
58 const struct kernel_ethtool_ts_info *ts_info = &data->ts_info;
59 int len = 0;
60 int ret;
61
62 BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32);
63 BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32);
64 BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32);
65
66 if (ts_info->so_timestamping) {
67 ret = ethnl_bitset32_size(&ts_info->so_timestamping, NULL,
68 __SOF_TIMESTAMPING_CNT,
69 sof_timestamping_names, compact);
70 if (ret < 0)
71 return ret;
72 len += ret; /* _TSINFO_TIMESTAMPING */
73 }
74 if (ts_info->tx_types) {
75 ret = ethnl_bitset32_size(&ts_info->tx_types, NULL,
76 __HWTSTAMP_TX_CNT,
77 ts_tx_type_names, compact);
78 if (ret < 0)
79 return ret;
80 len += ret; /* _TSINFO_TX_TYPES */
81 }
82 if (ts_info->rx_filters) {
83 ret = ethnl_bitset32_size(&ts_info->rx_filters, NULL,
84 __HWTSTAMP_FILTER_CNT,
85 ts_rx_filter_names, compact);
86 if (ret < 0)
87 return ret;
88 len += ret; /* _TSINFO_RX_FILTERS */
89 }
90 if (ts_info->phc_index >= 0)
91 len += nla_total_size(sizeof(u32)); /* _TSINFO_PHC_INDEX */
92 if (req_base->flags & ETHTOOL_FLAG_STATS)
93 len += nla_total_size(0) + /* _TSINFO_STATS */
94 nla_total_size_64bit(sizeof(u64)) * ETHTOOL_TS_STAT_CNT;
95
96 return len;
97 }
98
tsinfo_put_stat(struct sk_buff * skb,u64 val,u16 attrtype)99 static int tsinfo_put_stat(struct sk_buff *skb, u64 val, u16 attrtype)
100 {
101 if (val == ETHTOOL_STAT_NOT_SET)
102 return 0;
103 if (nla_put_uint(skb, attrtype, val))
104 return -EMSGSIZE;
105 return 0;
106 }
107
tsinfo_put_stats(struct sk_buff * skb,const struct ethtool_ts_stats * stats)108 static int tsinfo_put_stats(struct sk_buff *skb,
109 const struct ethtool_ts_stats *stats)
110 {
111 struct nlattr *nest;
112
113 nest = nla_nest_start(skb, ETHTOOL_A_TSINFO_STATS);
114 if (!nest)
115 return -EMSGSIZE;
116
117 if (tsinfo_put_stat(skb, stats->tx_stats.pkts,
118 ETHTOOL_A_TS_STAT_TX_PKTS) ||
119 tsinfo_put_stat(skb, stats->tx_stats.lost,
120 ETHTOOL_A_TS_STAT_TX_LOST) ||
121 tsinfo_put_stat(skb, stats->tx_stats.err,
122 ETHTOOL_A_TS_STAT_TX_ERR))
123 goto err_cancel;
124
125 nla_nest_end(skb, nest);
126 return 0;
127
128 err_cancel:
129 nla_nest_cancel(skb, nest);
130 return -EMSGSIZE;
131 }
132
tsinfo_fill_reply(struct sk_buff * skb,const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)133 static int tsinfo_fill_reply(struct sk_buff *skb,
134 const struct ethnl_req_info *req_base,
135 const struct ethnl_reply_data *reply_base)
136 {
137 const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
138 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
139 const struct kernel_ethtool_ts_info *ts_info = &data->ts_info;
140 int ret;
141
142 if (ts_info->so_timestamping) {
143 ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TIMESTAMPING,
144 &ts_info->so_timestamping, NULL,
145 __SOF_TIMESTAMPING_CNT,
146 sof_timestamping_names, compact);
147 if (ret < 0)
148 return ret;
149 }
150 if (ts_info->tx_types) {
151 ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TX_TYPES,
152 &ts_info->tx_types, NULL,
153 __HWTSTAMP_TX_CNT,
154 ts_tx_type_names, compact);
155 if (ret < 0)
156 return ret;
157 }
158 if (ts_info->rx_filters) {
159 ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_RX_FILTERS,
160 &ts_info->rx_filters, NULL,
161 __HWTSTAMP_FILTER_CNT,
162 ts_rx_filter_names, compact);
163 if (ret < 0)
164 return ret;
165 }
166 if (ts_info->phc_index >= 0 &&
167 nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX, ts_info->phc_index))
168 return -EMSGSIZE;
169 if (req_base->flags & ETHTOOL_FLAG_STATS &&
170 tsinfo_put_stats(skb, &data->stats))
171 return -EMSGSIZE;
172
173 return 0;
174 }
175
176 const struct ethnl_request_ops ethnl_tsinfo_request_ops = {
177 .request_cmd = ETHTOOL_MSG_TSINFO_GET,
178 .reply_cmd = ETHTOOL_MSG_TSINFO_GET_REPLY,
179 .hdr_attr = ETHTOOL_A_TSINFO_HEADER,
180 .req_info_size = sizeof(struct tsinfo_req_info),
181 .reply_data_size = sizeof(struct tsinfo_reply_data),
182
183 .prepare_data = tsinfo_prepare_data,
184 .reply_size = tsinfo_reply_size,
185 .fill_reply = tsinfo_fill_reply,
186 };
187