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