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187 lines
4.8 KiB
187 lines
4.8 KiB
// 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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struct ethtool_pause_stats pausestat; |
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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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const struct nla_policy ethnl_pause_get_policy[] = { |
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[ETHTOOL_A_PAUSE_HEADER] = |
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NLA_POLICY_NESTED(ethnl_header_policy_stats), |
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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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ethtool_stats_init((u64 *)&data->pausestat, |
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sizeof(data->pausestat) / 8); |
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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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if (req_base->flags & ETHTOOL_FLAG_STATS && |
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dev->ethtool_ops->get_pause_stats) |
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dev->ethtool_ops->get_pause_stats(dev, &data->pausestat); |
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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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int n = 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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if (req_base->flags & ETHTOOL_FLAG_STATS) |
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n += nla_total_size(0) + /* _PAUSE_STATS */ |
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nla_total_size_64bit(sizeof(u64)) * |
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(ETHTOOL_A_PAUSE_STAT_MAX - 2); |
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return n; |
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} |
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static int ethtool_put_stat(struct sk_buff *skb, u64 val, u16 attrtype, |
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u16 padtype) |
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{ |
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if (val == ETHTOOL_STAT_NOT_SET) |
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return 0; |
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if (nla_put_u64_64bit(skb, attrtype, val, padtype)) |
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return -EMSGSIZE; |
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return 0; |
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} |
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static int pause_put_stats(struct sk_buff *skb, |
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const struct ethtool_pause_stats *pause_stats) |
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{ |
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const u16 pad = ETHTOOL_A_PAUSE_STAT_PAD; |
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struct nlattr *nest; |
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nest = nla_nest_start(skb, ETHTOOL_A_PAUSE_STATS); |
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if (!nest) |
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return -EMSGSIZE; |
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if (ethtool_put_stat(skb, pause_stats->tx_pause_frames, |
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ETHTOOL_A_PAUSE_STAT_TX_FRAMES, pad) || |
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ethtool_put_stat(skb, pause_stats->rx_pause_frames, |
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ETHTOOL_A_PAUSE_STAT_RX_FRAMES, pad)) |
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goto err_cancel; |
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nla_nest_end(skb, nest); |
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return 0; |
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err_cancel: |
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nla_nest_cancel(skb, nest); |
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return -EMSGSIZE; |
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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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if (req_base->flags & ETHTOOL_FLAG_STATS && |
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pause_put_stats(skb, &data->pausestat)) |
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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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.req_info_size = sizeof(struct pause_req_info), |
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.reply_data_size = sizeof(struct pause_reply_data), |
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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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const struct nla_policy ethnl_pause_set_policy[] = { |
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[ETHTOOL_A_PAUSE_HEADER] = |
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NLA_POLICY_NESTED(ethnl_header_policy), |
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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 ethtool_pauseparam params = {}; |
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struct ethnl_req_info req_info = {}; |
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struct nlattr **tb = info->attrs; |
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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 = 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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