146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
// 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 pause_req_info {
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struct ethnl_req_info base;
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};
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struct pause_reply_data {
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struct ethnl_reply_data base;
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struct ethtool_pauseparam pauseparam;
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};
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#define PAUSE_REPDATA(__reply_base) \
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container_of(__reply_base, struct pause_reply_data, base)
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static const struct nla_policy
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pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
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[ETHTOOL_A_PAUSE_UNSPEC] = { .type = NLA_REJECT },
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[ETHTOOL_A_PAUSE_HEADER] = { .type = NLA_NESTED },
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[ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_REJECT },
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[ETHTOOL_A_PAUSE_RX] = { .type = NLA_REJECT },
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[ETHTOOL_A_PAUSE_TX] = { .type = NLA_REJECT },
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};
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static int pause_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 pause_reply_data *data = PAUSE_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_pauseparam)
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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_pauseparam(dev, &data->pauseparam);
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ethnl_ops_complete(dev);
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return 0;
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}
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static int pause_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(u8)) + /* _PAUSE_AUTONEG */
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nla_total_size(sizeof(u8)) + /* _PAUSE_RX */
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nla_total_size(sizeof(u8)); /* _PAUSE_TX */
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}
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static int pause_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 pause_reply_data *data = PAUSE_REPDATA(reply_base);
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const struct ethtool_pauseparam *pauseparam = &data->pauseparam;
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if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) ||
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nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) ||
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nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause))
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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_pause_request_ops = {
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.request_cmd = ETHTOOL_MSG_PAUSE_GET,
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.reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY,
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.hdr_attr = ETHTOOL_A_PAUSE_HEADER,
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.max_attr = ETHTOOL_A_PAUSE_MAX,
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.req_info_size = sizeof(struct pause_req_info),
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.reply_data_size = sizeof(struct pause_reply_data),
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.request_policy = pause_get_policy,
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.prepare_data = pause_prepare_data,
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.reply_size = pause_reply_size,
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.fill_reply = pause_fill_reply,
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};
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/* PAUSE_SET */
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static const struct nla_policy
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pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1] = {
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[ETHTOOL_A_PAUSE_UNSPEC] = { .type = NLA_REJECT },
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[ETHTOOL_A_PAUSE_HEADER] = { .type = NLA_NESTED },
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[ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_U8 },
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[ETHTOOL_A_PAUSE_RX] = { .type = NLA_U8 },
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[ETHTOOL_A_PAUSE_TX] = { .type = NLA_U8 },
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};
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int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info)
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{
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struct nlattr *tb[ETHTOOL_A_PAUSE_MAX + 1];
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struct ethtool_pauseparam params = {};
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struct ethnl_req_info req_info = {};
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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, ETHTOOL_A_PAUSE_MAX,
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pause_set_policy, 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_PAUSE_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_pauseparam || !ops->set_pauseparam)
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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_pauseparam(dev, ¶ms);
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ethnl_update_bool32(¶ms.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod);
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ethnl_update_bool32(¶ms.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod);
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ethnl_update_bool32(¶ms.tx_pause, tb[ETHTOOL_A_PAUSE_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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ret = dev->ethtool_ops->set_pauseparam(dev, ¶ms);
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if (ret < 0)
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goto out_ops;
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ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
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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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