1 // SPDX-License-Identifier: GPL-2.0-only
6 struct rings_req_info {
7 struct ethnl_req_info base;
10 struct rings_reply_data {
11 struct ethnl_reply_data base;
12 struct ethtool_ringparam ringparam;
13 struct kernel_ethtool_ringparam kernel_ringparam;
16 #define RINGS_REPDATA(__reply_base) \
17 container_of(__reply_base, struct rings_reply_data, base)
19 const struct nla_policy ethnl_rings_get_policy[] = {
20 [ETHTOOL_A_RINGS_HEADER] =
21 NLA_POLICY_NESTED(ethnl_header_policy),
24 static int rings_prepare_data(const struct ethnl_req_info *req_base,
25 struct ethnl_reply_data *reply_base,
26 struct genl_info *info)
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;
33 if (!dev->ethtool_ops->get_ringparam)
35 ret = ethnl_ops_begin(dev);
38 dev->ethtool_ops->get_ringparam(dev, &data->ringparam,
39 &data->kernel_ringparam, extack);
40 ethnl_ops_complete(dev);
45 static int rings_reply_size(const struct ethnl_req_info *req_base,
46 const struct ethnl_reply_data *reply_base)
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 */
59 static int rings_fill_reply(struct sk_buff *skb,
60 const struct ethnl_req_info *req_base,
61 const struct ethnl_reply_data *reply_base)
63 const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
64 const struct kernel_ethtool_ringparam *kernel_ringparam = &data->kernel_ringparam;
65 const struct ethtool_ringparam *ringparam = &data->ringparam;
67 if ((ringparam->rx_max_pending &&
68 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
69 ringparam->rx_max_pending) ||
70 nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
71 ringparam->rx_pending))) ||
72 (ringparam->rx_mini_max_pending &&
73 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
74 ringparam->rx_mini_max_pending) ||
75 nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
76 ringparam->rx_mini_pending))) ||
77 (ringparam->rx_jumbo_max_pending &&
78 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
79 ringparam->rx_jumbo_max_pending) ||
80 nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
81 ringparam->rx_jumbo_pending))) ||
82 (ringparam->tx_max_pending &&
83 (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
84 ringparam->tx_max_pending) ||
85 nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
86 ringparam->tx_pending))) ||
87 (kernel_ringparam->rx_buf_len &&
88 (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN,
89 kernel_ringparam->rx_buf_len))))
95 const struct ethnl_request_ops ethnl_rings_request_ops = {
96 .request_cmd = ETHTOOL_MSG_RINGS_GET,
97 .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
98 .hdr_attr = ETHTOOL_A_RINGS_HEADER,
99 .req_info_size = sizeof(struct rings_req_info),
100 .reply_data_size = sizeof(struct rings_reply_data),
102 .prepare_data = rings_prepare_data,
103 .reply_size = rings_reply_size,
104 .fill_reply = rings_fill_reply,
109 const struct nla_policy ethnl_rings_set_policy[] = {
110 [ETHTOOL_A_RINGS_HEADER] =
111 NLA_POLICY_NESTED(ethnl_header_policy),
112 [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
113 [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
114 [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
115 [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
116 [ETHTOOL_A_RINGS_RX_BUF_LEN] = NLA_POLICY_MIN(NLA_U32, 1),
119 int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
121 struct kernel_ethtool_ringparam kernel_ringparam = {};
122 struct ethtool_ringparam ringparam = {};
123 struct ethnl_req_info req_info = {};
124 struct nlattr **tb = info->attrs;
125 const struct nlattr *err_attr;
126 const struct ethtool_ops *ops;
127 struct net_device *dev;
131 ret = ethnl_parse_header_dev_get(&req_info,
132 tb[ETHTOOL_A_RINGS_HEADER],
133 genl_info_net(info), info->extack,
138 ops = dev->ethtool_ops;
140 if (!ops->get_ringparam || !ops->set_ringparam)
144 ret = ethnl_ops_begin(dev);
147 ops->get_ringparam(dev, &ringparam, &kernel_ringparam, info->extack);
149 ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
150 ethnl_update_u32(&ringparam.rx_mini_pending,
151 tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
152 ethnl_update_u32(&ringparam.rx_jumbo_pending,
153 tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
154 ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
155 ethnl_update_u32(&kernel_ringparam.rx_buf_len,
156 tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
161 /* ensure new ring parameters are within limits */
162 if (ringparam.rx_pending > ringparam.rx_max_pending)
163 err_attr = tb[ETHTOOL_A_RINGS_RX];
164 else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
165 err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
166 else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
167 err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
168 else if (ringparam.tx_pending > ringparam.tx_max_pending)
169 err_attr = tb[ETHTOOL_A_RINGS_TX];
174 NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
175 "requested ring size exceeds maximum");
179 if (kernel_ringparam.rx_buf_len != 0 &&
180 !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
182 NL_SET_ERR_MSG_ATTR(info->extack,
183 tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
184 "setting rx buf len not supported");
188 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
189 &kernel_ringparam, info->extack);
192 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
195 ethnl_ops_complete(dev);
199 ethnl_parse_header_dev_put(&req_info);