1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
// SPDX-License-Identifier: GPL-2.0-only
#include "netlink.h"
#include "common.h"
struct pause_req_info {
struct ethnl_req_info base;
enum ethtool_mac_stats_src src;
};
#define PAUSE_REQINFO(__req_base) \
container_of(__req_base, struct pause_req_info, base)
struct pause_reply_data {
struct ethnl_reply_data base;
struct ethtool_pauseparam pauseparam;
struct ethtool_pause_stats pausestat;
};
#define PAUSE_REPDATA(__reply_base) \
container_of(__reply_base, struct pause_reply_data, base)
const struct nla_policy ethnl_pause_get_policy[] = {
[ETHTOOL_A_PAUSE_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy_stats),
[ETHTOOL_A_PAUSE_STATS_SRC] =
NLA_POLICY_MAX(NLA_U32, ETHTOOL_MAC_STATS_SRC_PMAC),
};
static int pause_parse_request(struct ethnl_req_info *req_base,
struct nlattr **tb,
struct netlink_ext_ack *extack)
{
enum ethtool_mac_stats_src src = ETHTOOL_MAC_STATS_SRC_AGGREGATE;
struct pause_req_info *req_info = PAUSE_REQINFO(req_base);
if (tb[ETHTOOL_A_PAUSE_STATS_SRC]) {
if (!(req_base->flags & ETHTOOL_FLAG_STATS)) {
NL_SET_ERR_MSG_MOD(extack,
"ETHTOOL_FLAG_STATS must be set when requesting a source of stats");
return -EINVAL;
}
src = nla_get_u32(tb[ETHTOOL_A_PAUSE_STATS_SRC]);
}
req_info->src = src;
return 0;
}
static int pause_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
const struct genl_info *info)
{
const struct pause_req_info *req_info = PAUSE_REQINFO(req_base);
struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
enum ethtool_mac_stats_src src = req_info->src;
struct net_device *dev = reply_base->dev;
int ret;
if (!dev->ethtool_ops->get_pauseparam)
return -EOPNOTSUPP;
ethtool_stats_init((u64 *)&data->pausestat,
sizeof(data->pausestat) / 8);
data->pausestat.src = src;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
if ((src == ETHTOOL_MAC_STATS_SRC_EMAC ||
src == ETHTOOL_MAC_STATS_SRC_PMAC) &&
!__ethtool_dev_mm_supported(dev)) {
NL_SET_ERR_MSG_MOD(info->extack,
"Device does not support MAC merge layer");
ethnl_ops_complete(dev);
return -EOPNOTSUPP;
}
dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam);
if (req_base->flags & ETHTOOL_FLAG_STATS &&
dev->ethtool_ops->get_pause_stats)
dev->ethtool_ops->get_pause_stats(dev, &data->pausestat);
ethnl_ops_complete(dev);
return 0;
}
static int pause_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
int n = nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */
nla_total_size(sizeof(u8)) + /* _PAUSE_RX */
nla_total_size(sizeof(u8)); /* _PAUSE_TX */
if (req_base->flags & ETHTOOL_FLAG_STATS)
n += nla_total_size(0) + /* _PAUSE_STATS */
nla_total_size(sizeof(u32)) + /* _PAUSE_STATS_SRC */
nla_total_size_64bit(sizeof(u64)) * ETHTOOL_PAUSE_STAT_CNT;
return n;
}
static int ethtool_put_stat(struct sk_buff *skb, u64 val, u16 attrtype,
u16 padtype)
{
if (val == ETHTOOL_STAT_NOT_SET)
return 0;
if (nla_put_u64_64bit(skb, attrtype, val, padtype))
return -EMSGSIZE;
return 0;
}
static int pause_put_stats(struct sk_buff *skb,
const struct ethtool_pause_stats *pause_stats)
{
const u16 pad = ETHTOOL_A_PAUSE_STAT_PAD;
struct nlattr *nest;
if (nla_put_u32(skb, ETHTOOL_A_PAUSE_STATS_SRC, pause_stats->src))
return -EMSGSIZE;
nest = nla_nest_start(skb, ETHTOOL_A_PAUSE_STATS);
if (!nest)
return -EMSGSIZE;
if (ethtool_put_stat(skb, pause_stats->tx_pause_frames,
ETHTOOL_A_PAUSE_STAT_TX_FRAMES, pad) ||
ethtool_put_stat(skb, pause_stats->rx_pause_frames,
ETHTOOL_A_PAUSE_STAT_RX_FRAMES, pad))
goto err_cancel;
nla_nest_end(skb, nest);
return 0;
err_cancel:
nla_nest_cancel(skb, nest);
return -EMSGSIZE;
}
static int pause_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct pause_reply_data *data = PAUSE_REPDATA(reply_base);
const struct ethtool_pauseparam *pauseparam = &data->pauseparam;
if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) ||
nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) ||
nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause))
return -EMSGSIZE;
if (req_base->flags & ETHTOOL_FLAG_STATS &&
pause_put_stats(skb, &data->pausestat))
return -EMSGSIZE;
return 0;
}
/* PAUSE_SET */
const struct nla_policy ethnl_pause_set_policy[] = {
[ETHTOOL_A_PAUSE_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_U8 },
[ETHTOOL_A_PAUSE_RX] = { .type = NLA_U8 },
[ETHTOOL_A_PAUSE_TX] = { .type = NLA_U8 },
};
static int
ethnl_set_pause_validate(struct ethnl_req_info *req_info,
struct genl_info *info)
{
const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
return ops->get_pauseparam && ops->set_pauseparam ? 1 : -EOPNOTSUPP;
}
static int
ethnl_set_pause(struct ethnl_req_info *req_info, struct genl_info *info)
{
struct net_device *dev = req_info->dev;
struct ethtool_pauseparam params = {};
struct nlattr **tb = info->attrs;
bool mod = false;
int ret;
dev->ethtool_ops->get_pauseparam(dev, ¶ms);
ethnl_update_bool32(¶ms.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod);
ethnl_update_bool32(¶ms.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod);
ethnl_update_bool32(¶ms.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod);
if (!mod)
return 0;
ret = dev->ethtool_ops->set_pauseparam(dev, ¶ms);
return ret < 0 ? ret : 1;
}
const struct ethnl_request_ops ethnl_pause_request_ops = {
.request_cmd = ETHTOOL_MSG_PAUSE_GET,
.reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY,
.hdr_attr = ETHTOOL_A_PAUSE_HEADER,
.req_info_size = sizeof(struct pause_req_info),
.reply_data_size = sizeof(struct pause_reply_data),
.parse_request = pause_parse_request,
.prepare_data = pause_prepare_data,
.reply_size = pause_reply_size,
.fill_reply = pause_fill_reply,
.set_validate = ethnl_set_pause_validate,
.set = ethnl_set_pause,
.set_ntf_cmd = ETHTOOL_MSG_PAUSE_NTF,
};
|
