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1// SPDX-License-Identifier: GPL-2.0-only
2
3#include "netlink.h"
4#include "common.h"
5
6struct rings_req_info {
7 struct ethnl_req_info base;
8};
9
10struct rings_reply_data {
11 struct ethnl_reply_data base;
12 struct ethtool_ringparam ringparam;
13 struct kernel_ethtool_ringparam kernel_ringparam;
14 u32 supported_ring_params;
15};
16
17#define RINGS_REPDATA(__reply_base) \
18 container_of(__reply_base, struct rings_reply_data, base)
19
20const struct nla_policy ethnl_rings_get_policy[] = {
21 [ETHTOOL_A_RINGS_HEADER] =
22 NLA_POLICY_NESTED(ethnl_header_policy),
23};
24
25static int rings_prepare_data(const struct ethnl_req_info *req_base,
26 struct ethnl_reply_data *reply_base,
27 const struct genl_info *info)
28{
29 struct rings_reply_data *data = RINGS_REPDATA(reply_base);
30 struct net_device *dev = reply_base->dev;
31 int ret;
32
33 if (!dev->ethtool_ops->get_ringparam)
34 return -EOPNOTSUPP;
35
36 data->supported_ring_params = dev->ethtool_ops->supported_ring_params;
37 ret = ethnl_ops_begin(dev);
38 if (ret < 0)
39 return ret;
40 dev->ethtool_ops->get_ringparam(dev, &data->ringparam,
41 &data->kernel_ringparam, info->extack);
42 ethnl_ops_complete(dev);
43
44 return 0;
45}
46
47static int rings_reply_size(const struct ethnl_req_info *req_base,
48 const struct ethnl_reply_data *reply_base)
49{
50 return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */
51 nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */
52 nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */
53 nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */
54 nla_total_size(sizeof(u32)) + /* _RINGS_RX */
55 nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */
56 nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */
57 nla_total_size(sizeof(u32)) + /* _RINGS_TX */
58 nla_total_size(sizeof(u32)) + /* _RINGS_RX_BUF_LEN */
59 nla_total_size(sizeof(u8)) + /* _RINGS_TCP_DATA_SPLIT */
60 nla_total_size(sizeof(u32) + /* _RINGS_CQE_SIZE */
61 nla_total_size(sizeof(u8)) + /* _RINGS_TX_PUSH */
62 nla_total_size(sizeof(u8))) + /* _RINGS_RX_PUSH */
63 nla_total_size(sizeof(u32)) + /* _RINGS_TX_PUSH_BUF_LEN */
64 nla_total_size(sizeof(u32)); /* _RINGS_TX_PUSH_BUF_LEN_MAX */
65}
66
67static int rings_fill_reply(struct sk_buff *skb,
68 const struct ethnl_req_info *req_base,
69 const struct ethnl_reply_data *reply_base)
70{
71 const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
72 const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam;
73 const struct ethtool_ringparam *ringparam = &data->ringparam;
74 u32 supported_ring_params = data->supported_ring_params;
75
76 WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED);
77
78 if ((ringparam->rx_max_pending &&
79 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
80 ringparam->rx_max_pending) ||
81 nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
82 ringparam->rx_pending))) ||
83 (ringparam->rx_mini_max_pending &&
84 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
85 ringparam->rx_mini_max_pending) ||
86 nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
87 ringparam->rx_mini_pending))) ||
88 (ringparam->rx_jumbo_max_pending &&
89 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
90 ringparam->rx_jumbo_max_pending) ||
91 nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
92 ringparam->rx_jumbo_pending))) ||
93 (ringparam->tx_max_pending &&
94 (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
95 ringparam->tx_max_pending) ||
96 nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
97 ringparam->tx_pending))) ||
98 (kr->rx_buf_len &&
99 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) ||
100 (kr->tcp_data_split &&
101 (nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT,
102 kr->tcp_data_split))) ||
103 (kr->cqe_size &&
104 (nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))) ||
105 nla_put_u8(skb, ETHTOOL_A_RINGS_TX_PUSH, !!kr->tx_push) ||
106 nla_put_u8(skb, ETHTOOL_A_RINGS_RX_PUSH, !!kr->rx_push) ||
107 ((supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN) &&
108 (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN_MAX,
109 kr->tx_push_buf_max_len) ||
110 nla_put_u32(skb, ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN,
111 kr->tx_push_buf_len))))
112 return -EMSGSIZE;
113
114 return 0;
115}
116
117/* RINGS_SET */
118
119const struct nla_policy ethnl_rings_set_policy[] = {
120 [ETHTOOL_A_RINGS_HEADER] =
121 NLA_POLICY_NESTED(ethnl_header_policy),
122 [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
123 [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
124 [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
125 [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
126 [ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1),
127 [ETHTOOL_A_RINGS_TCP_DATA_SPLIT] =
128 NLA_POLICY_MAX(NLA_U8, ETHTOOL_TCP_DATA_SPLIT_ENABLED),
129 [ETHTOOL_A_RINGS_CQE_SIZE] = NLA_POLICY_MIN(NLA_U32, 1),
130 [ETHTOOL_A_RINGS_TX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1),
131 [ETHTOOL_A_RINGS_RX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1),
132 [ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] = { .type = NLA_U32 },
133};
134
135static int
136ethnl_set_rings_validate(struct ethnl_req_info *req_info,
137 struct genl_info *info)
138{
139 const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
140 struct nlattr **tb = info->attrs;
141
142 if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] &&
143 !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
144 NL_SET_ERR_MSG_ATTR(info->extack,
145 tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
146 "setting rx buf len not supported");
147 return -EOPNOTSUPP;
148 }
149
150 if (tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT] &&
151 !(ops->supported_ring_params & ETHTOOL_RING_USE_TCP_DATA_SPLIT)) {
152 NL_SET_ERR_MSG_ATTR(info->extack,
153 tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT],
154 "setting TCP data split is not supported");
155 return -EOPNOTSUPP;
156 }
157
158 if (tb[ETHTOOL_A_RINGS_CQE_SIZE] &&
159 !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
160 NL_SET_ERR_MSG_ATTR(info->extack,
161 tb[ETHTOOL_A_RINGS_CQE_SIZE],
162 "setting cqe size not supported");
163 return -EOPNOTSUPP;
164 }
165
166 if (tb[ETHTOOL_A_RINGS_TX_PUSH] &&
167 !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) {
168 NL_SET_ERR_MSG_ATTR(info->extack,
169 tb[ETHTOOL_A_RINGS_TX_PUSH],
170 "setting tx push not supported");
171 return -EOPNOTSUPP;
172 }
173
174 if (tb[ETHTOOL_A_RINGS_RX_PUSH] &&
175 !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_PUSH)) {
176 NL_SET_ERR_MSG_ATTR(info->extack,
177 tb[ETHTOOL_A_RINGS_RX_PUSH],
178 "setting rx push not supported");
179 return -EOPNOTSUPP;
180 }
181
182 if (tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN] &&
183 !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH_BUF_LEN)) {
184 NL_SET_ERR_MSG_ATTR(info->extack,
185 tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN],
186 "setting tx push buf len is not supported");
187 return -EOPNOTSUPP;
188 }
189
190 return ops->get_ringparam && ops->set_ringparam ? 1 : -EOPNOTSUPP;
191}
192
193static int
194ethnl_set_rings(struct ethnl_req_info *req_info, struct genl_info *info)
195{
196 struct kernel_ethtool_ringparam kernel_ringparam = {};
197 struct ethtool_ringparam ringparam = {};
198 struct net_device *dev = req_info->dev;
199 struct nlattr **tb = info->attrs;
200 const struct nlattr *err_attr;
201 bool mod = false;
202 int ret;
203
204 dev->ethtool_ops->get_ringparam(dev, &ringparam,
205 &kernel_ringparam, info->extack);
206
207 ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
208 ethnl_update_u32(&ringparam.rx_mini_pending,
209 tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
210 ethnl_update_u32(&ringparam.rx_jumbo_pending,
211 tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
212 ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
213 ethnl_update_u32(&kernel_ringparam.rx_buf_len,
214 tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
215 ethnl_update_u8(&kernel_ringparam.tcp_data_split,
216 tb[ETHTOOL_A_RINGS_TCP_DATA_SPLIT], &mod);
217 ethnl_update_u32(&kernel_ringparam.cqe_size,
218 tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod);
219 ethnl_update_u8(&kernel_ringparam.tx_push,
220 tb[ETHTOOL_A_RINGS_TX_PUSH], &mod);
221 ethnl_update_u8(&kernel_ringparam.rx_push,
222 tb[ETHTOOL_A_RINGS_RX_PUSH], &mod);
223 ethnl_update_u32(&kernel_ringparam.tx_push_buf_len,
224 tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN], &mod);
225 if (!mod)
226 return 0;
227
228 /* ensure new ring parameters are within limits */
229 if (ringparam.rx_pending > ringparam.rx_max_pending)
230 err_attr = tb[ETHTOOL_A_RINGS_RX];
231 else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
232 err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
233 else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
234 err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
235 else if (ringparam.tx_pending > ringparam.tx_max_pending)
236 err_attr = tb[ETHTOOL_A_RINGS_TX];
237 else
238 err_attr = NULL;
239 if (err_attr) {
240 NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
241 "requested ring size exceeds maximum");
242 return -EINVAL;
243 }
244
245 if (kernel_ringparam.tx_push_buf_len > kernel_ringparam.tx_push_buf_max_len) {
246 NL_SET_ERR_MSG_ATTR_FMT(info->extack, tb[ETHTOOL_A_RINGS_TX_PUSH_BUF_LEN],
247 "Requested TX push buffer exceeds the maximum of %u",
248 kernel_ringparam.tx_push_buf_max_len);
249
250 return -EINVAL;
251 }
252
253 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
254 &kernel_ringparam, info->extack);
255 return ret < 0 ? ret : 1;
256}
257
258const struct ethnl_request_ops ethnl_rings_request_ops = {
259 .request_cmd = ETHTOOL_MSG_RINGS_GET,
260 .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
261 .hdr_attr = ETHTOOL_A_RINGS_HEADER,
262 .req_info_size = sizeof(struct rings_req_info),
263 .reply_data_size = sizeof(struct rings_reply_data),
264
265 .prepare_data = rings_prepare_data,
266 .reply_size = rings_reply_size,
267 .fill_reply = rings_fill_reply,
268
269 .set_validate = ethnl_set_rings_validate,
270 .set = ethnl_set_rings,
271 .set_ntf_cmd = ETHTOOL_MSG_RINGS_NTF,
272};
1// SPDX-License-Identifier: GPL-2.0-only
2
3#include "netlink.h"
4#include "common.h"
5
6struct rings_req_info {
7 struct ethnl_req_info base;
8};
9
10struct rings_reply_data {
11 struct ethnl_reply_data base;
12 struct ethtool_ringparam ringparam;
13 struct kernel_ethtool_ringparam kernel_ringparam;
14};
15
16#define RINGS_REPDATA(__reply_base) \
17 container_of(__reply_base, struct rings_reply_data, base)
18
19const struct nla_policy ethnl_rings_get_policy[] = {
20 [ETHTOOL_A_RINGS_HEADER] =
21 NLA_POLICY_NESTED(ethnl_header_policy),
22};
23
24static int rings_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 struct genl_info *info)
27{
28 struct rings_reply_data *data = RINGS_REPDATA(reply_base);
29 struct netlink_ext_ack *extack = info ? info->extack : NULL;
30 struct net_device *dev = reply_base->dev;
31 int ret;
32
33 if (!dev->ethtool_ops->get_ringparam)
34 return -EOPNOTSUPP;
35 ret = ethnl_ops_begin(dev);
36 if (ret < 0)
37 return ret;
38 dev->ethtool_ops->get_ringparam(dev, &data->ringparam,
39 &data->kernel_ringparam, extack);
40 ethnl_ops_complete(dev);
41
42 return 0;
43}
44
45static int rings_reply_size(const struct ethnl_req_info *req_base,
46 const struct ethnl_reply_data *reply_base)
47{
48 return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */
49 nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */
50 nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */
51 nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */
52 nla_total_size(sizeof(u32)) + /* _RINGS_RX */
53 nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */
54 nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */
55 nla_total_size(sizeof(u32)) + /* _RINGS_TX */
56 nla_total_size(sizeof(u32)) + /* _RINGS_RX_BUF_LEN */
57 nla_total_size(sizeof(u8)) + /* _RINGS_TCP_DATA_SPLIT */
58 nla_total_size(sizeof(u32) + /* _RINGS_CQE_SIZE */
59 nla_total_size(sizeof(u8))); /* _RINGS_TX_PUSH */
60}
61
62static int rings_fill_reply(struct sk_buff *skb,
63 const struct ethnl_req_info *req_base,
64 const struct ethnl_reply_data *reply_base)
65{
66 const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
67 const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam;
68 const struct ethtool_ringparam *ringparam = &data->ringparam;
69
70 WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED);
71
72 if ((ringparam->rx_max_pending &&
73 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
74 ringparam->rx_max_pending) ||
75 nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
76 ringparam->rx_pending))) ||
77 (ringparam->rx_mini_max_pending &&
78 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
79 ringparam->rx_mini_max_pending) ||
80 nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
81 ringparam->rx_mini_pending))) ||
82 (ringparam->rx_jumbo_max_pending &&
83 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
84 ringparam->rx_jumbo_max_pending) ||
85 nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
86 ringparam->rx_jumbo_pending))) ||
87 (ringparam->tx_max_pending &&
88 (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
89 ringparam->tx_max_pending) ||
90 nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
91 ringparam->tx_pending))) ||
92 (kr->rx_buf_len &&
93 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) ||
94 (kr->tcp_data_split &&
95 (nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT,
96 kr->tcp_data_split))) ||
97 (kr->cqe_size &&
98 (nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))) ||
99 nla_put_u8(skb, ETHTOOL_A_RINGS_TX_PUSH, !!kr->tx_push))
100 return -EMSGSIZE;
101
102 return 0;
103}
104
105const struct ethnl_request_ops ethnl_rings_request_ops = {
106 .request_cmd = ETHTOOL_MSG_RINGS_GET,
107 .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
108 .hdr_attr = ETHTOOL_A_RINGS_HEADER,
109 .req_info_size = sizeof(struct rings_req_info),
110 .reply_data_size = sizeof(struct rings_reply_data),
111
112 .prepare_data = rings_prepare_data,
113 .reply_size = rings_reply_size,
114 .fill_reply = rings_fill_reply,
115};
116
117/* RINGS_SET */
118
119const struct nla_policy ethnl_rings_set_policy[] = {
120 [ETHTOOL_A_RINGS_HEADER] =
121 NLA_POLICY_NESTED(ethnl_header_policy),
122 [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
123 [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
124 [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
125 [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
126 [ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1),
127 [ETHTOOL_A_RINGS_CQE_SIZE] = NLA_POLICY_MIN(NLA_U32, 1),
128 [ETHTOOL_A_RINGS_TX_PUSH] = NLA_POLICY_MAX(NLA_U8, 1),
129};
130
131int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
132{
133 struct kernel_ethtool_ringparam kernel_ringparam = {};
134 struct ethtool_ringparam ringparam = {};
135 struct ethnl_req_info req_info = {};
136 struct nlattr **tb = info->attrs;
137 const struct nlattr *err_attr;
138 const struct ethtool_ops *ops;
139 struct net_device *dev;
140 bool mod = false;
141 int ret;
142
143 ret = ethnl_parse_header_dev_get(&req_info,
144 tb[ETHTOOL_A_RINGS_HEADER],
145 genl_info_net(info), info->extack,
146 true);
147 if (ret < 0)
148 return ret;
149 dev = req_info.dev;
150 ops = dev->ethtool_ops;
151 ret = -EOPNOTSUPP;
152 if (!ops->get_ringparam || !ops->set_ringparam)
153 goto out_dev;
154
155 if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] &&
156 !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
157 ret = -EOPNOTSUPP;
158 NL_SET_ERR_MSG_ATTR(info->extack,
159 tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
160 "setting rx buf len not supported");
161 goto out_dev;
162 }
163
164 if (tb[ETHTOOL_A_RINGS_CQE_SIZE] &&
165 !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
166 ret = -EOPNOTSUPP;
167 NL_SET_ERR_MSG_ATTR(info->extack,
168 tb[ETHTOOL_A_RINGS_CQE_SIZE],
169 "setting cqe size not supported");
170 goto out_dev;
171 }
172
173 if (tb[ETHTOOL_A_RINGS_TX_PUSH] &&
174 !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) {
175 ret = -EOPNOTSUPP;
176 NL_SET_ERR_MSG_ATTR(info->extack,
177 tb[ETHTOOL_A_RINGS_TX_PUSH],
178 "setting tx push not supported");
179 goto out_dev;
180 }
181
182 rtnl_lock();
183 ret = ethnl_ops_begin(dev);
184 if (ret < 0)
185 goto out_rtnl;
186 ops->get_ringparam(dev, &ringparam, &kernel_ringparam, info->extack);
187
188 ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
189 ethnl_update_u32(&ringparam.rx_mini_pending,
190 tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
191 ethnl_update_u32(&ringparam.rx_jumbo_pending,
192 tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
193 ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
194 ethnl_update_u32(&kernel_ringparam.rx_buf_len,
195 tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
196 ethnl_update_u32(&kernel_ringparam.cqe_size,
197 tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod);
198 ethnl_update_u8(&kernel_ringparam.tx_push,
199 tb[ETHTOOL_A_RINGS_TX_PUSH], &mod);
200 ret = 0;
201 if (!mod)
202 goto out_ops;
203
204 /* ensure new ring parameters are within limits */
205 if (ringparam.rx_pending > ringparam.rx_max_pending)
206 err_attr = tb[ETHTOOL_A_RINGS_RX];
207 else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
208 err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
209 else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
210 err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
211 else if (ringparam.tx_pending > ringparam.tx_max_pending)
212 err_attr = tb[ETHTOOL_A_RINGS_TX];
213 else
214 err_attr = NULL;
215 if (err_attr) {
216 ret = -EINVAL;
217 NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
218 "requested ring size exceeds maximum");
219 goto out_ops;
220 }
221
222 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
223 &kernel_ringparam, info->extack);
224 if (ret < 0)
225 goto out_ops;
226 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
227
228out_ops:
229 ethnl_ops_complete(dev);
230out_rtnl:
231 rtnl_unlock();
232out_dev:
233 ethnl_parse_header_dev_put(&req_info);
234 return ret;
235}