2020-03-12 20:08:23 +00:00
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// SPDX-License-Identifier: GPL-2.0-only
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#include "netlink.h"
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#include "common.h"
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struct rings_req_info {
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struct ethnl_req_info base;
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};
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struct rings_reply_data {
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struct ethnl_reply_data base;
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struct ethtool_ringparam ringparam;
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};
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#define RINGS_REPDATA(__reply_base) \
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container_of(__reply_base, struct rings_reply_data, base)
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2020-10-05 22:07:33 +00:00
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const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_MAX + 1] = {
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2020-03-12 20:08:23 +00:00
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[ETHTOOL_A_RINGS_UNSPEC] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_HEADER] = { .type = NLA_NESTED },
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[ETHTOOL_A_RINGS_RX_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX_MINI_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX_JUMBO_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_TX_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_TX] = { .type = NLA_REJECT },
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};
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static int rings_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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struct genl_info *info)
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{
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struct rings_reply_data *data = RINGS_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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int ret;
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if (!dev->ethtool_ops->get_ringparam)
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return -EOPNOTSUPP;
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return ret;
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dev->ethtool_ops->get_ringparam(dev, &data->ringparam);
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ethnl_ops_complete(dev);
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return 0;
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}
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static int rings_reply_size(const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */
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nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */
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nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */
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nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */
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nla_total_size(sizeof(u32)) + /* _RINGS_RX */
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nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */
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nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */
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nla_total_size(sizeof(u32)); /* _RINGS_TX */
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}
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static int rings_fill_reply(struct sk_buff *skb,
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const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
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const struct ethtool_ringparam *ringparam = &data->ringparam;
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if ((ringparam->rx_max_pending &&
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(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
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ringparam->rx_max_pending) ||
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nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
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ringparam->rx_pending))) ||
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(ringparam->rx_mini_max_pending &&
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(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
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ringparam->rx_mini_max_pending) ||
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nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
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ringparam->rx_mini_pending))) ||
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(ringparam->rx_jumbo_max_pending &&
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(nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
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ringparam->rx_jumbo_max_pending) ||
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nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
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ringparam->rx_jumbo_pending))) ||
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(ringparam->tx_max_pending &&
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(nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
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ringparam->tx_max_pending) ||
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nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
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ringparam->tx_pending))))
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return -EMSGSIZE;
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return 0;
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}
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const struct ethnl_request_ops ethnl_rings_request_ops = {
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.request_cmd = ETHTOOL_MSG_RINGS_GET,
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.reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
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.hdr_attr = ETHTOOL_A_RINGS_HEADER,
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.req_info_size = sizeof(struct rings_req_info),
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.reply_data_size = sizeof(struct rings_reply_data),
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.prepare_data = rings_prepare_data,
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.reply_size = rings_reply_size,
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.fill_reply = rings_fill_reply,
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};
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2020-03-12 20:08:28 +00:00
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/* RINGS_SET */
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static const struct nla_policy
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rings_set_policy[ETHTOOL_A_RINGS_MAX + 1] = {
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[ETHTOOL_A_RINGS_UNSPEC] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_HEADER] = { .type = NLA_NESTED },
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[ETHTOOL_A_RINGS_RX_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX_MINI_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX_JUMBO_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_TX_MAX] = { .type = NLA_REJECT },
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[ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
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[ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
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[ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
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[ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
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};
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int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
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{
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struct nlattr *tb[ETHTOOL_A_RINGS_MAX + 1];
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struct ethtool_ringparam ringparam = {};
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struct ethnl_req_info req_info = {};
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const struct nlattr *err_attr;
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const struct ethtool_ops *ops;
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struct net_device *dev;
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bool mod = false;
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int ret;
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ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
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ETHTOOL_A_RINGS_MAX, rings_set_policy,
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info->extack);
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if (ret < 0)
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return ret;
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ret = ethnl_parse_header_dev_get(&req_info,
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tb[ETHTOOL_A_RINGS_HEADER],
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genl_info_net(info), info->extack,
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true);
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if (ret < 0)
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return ret;
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dev = req_info.dev;
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ops = dev->ethtool_ops;
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ret = -EOPNOTSUPP;
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if (!ops->get_ringparam || !ops->set_ringparam)
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goto out_dev;
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rtnl_lock();
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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goto out_rtnl;
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ops->get_ringparam(dev, &ringparam);
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ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
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ethnl_update_u32(&ringparam.rx_mini_pending,
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tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
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ethnl_update_u32(&ringparam.rx_jumbo_pending,
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tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
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ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
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ret = 0;
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if (!mod)
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goto out_ops;
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/* ensure new ring parameters are within limits */
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if (ringparam.rx_pending > ringparam.rx_max_pending)
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err_attr = tb[ETHTOOL_A_RINGS_RX];
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else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
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err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
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else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
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err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
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else if (ringparam.tx_pending > ringparam.tx_max_pending)
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err_attr = tb[ETHTOOL_A_RINGS_TX];
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else
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err_attr = NULL;
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if (err_attr) {
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ret = -EINVAL;
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NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
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2020-03-13 11:25:34 +00:00
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"requested ring size exceeds maximum");
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2020-03-12 20:08:28 +00:00
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goto out_ops;
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}
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ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
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2020-03-12 20:08:33 +00:00
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if (ret < 0)
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goto out_ops;
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ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
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2020-03-12 20:08:28 +00:00
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out_ops:
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ethnl_ops_complete(dev);
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out_rtnl:
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rtnl_unlock();
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out_dev:
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dev_put(dev);
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return ret;
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}
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