1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include "netlink.h" 4 #include "common.h" 5 6 struct pause_req_info { 7 struct ethnl_req_info base; 8 }; 9 10 struct pause_reply_data { 11 struct ethnl_reply_data base; 12 struct ethtool_pauseparam pauseparam; 13 }; 14 15 #define PAUSE_REPDATA(__reply_base) \ 16 container_of(__reply_base, struct pause_reply_data, base) 17 18 static const struct nla_policy 19 pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1] = { 20 [ETHTOOL_A_PAUSE_UNSPEC] = { .type = NLA_REJECT }, 21 [ETHTOOL_A_PAUSE_HEADER] = { .type = NLA_NESTED }, 22 [ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_REJECT }, 23 [ETHTOOL_A_PAUSE_RX] = { .type = NLA_REJECT }, 24 [ETHTOOL_A_PAUSE_TX] = { .type = NLA_REJECT }, 25 }; 26 27 static int pause_prepare_data(const struct ethnl_req_info *req_base, 28 struct ethnl_reply_data *reply_base, 29 struct genl_info *info) 30 { 31 struct pause_reply_data *data = PAUSE_REPDATA(reply_base); 32 struct net_device *dev = reply_base->dev; 33 int ret; 34 35 if (!dev->ethtool_ops->get_pauseparam) 36 return -EOPNOTSUPP; 37 ret = ethnl_ops_begin(dev); 38 if (ret < 0) 39 return ret; 40 dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam); 41 ethnl_ops_complete(dev); 42 43 return 0; 44 } 45 46 static int pause_reply_size(const struct ethnl_req_info *req_base, 47 const struct ethnl_reply_data *reply_base) 48 { 49 return nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */ 50 nla_total_size(sizeof(u8)) + /* _PAUSE_RX */ 51 nla_total_size(sizeof(u8)); /* _PAUSE_TX */ 52 } 53 54 static int pause_fill_reply(struct sk_buff *skb, 55 const struct ethnl_req_info *req_base, 56 const struct ethnl_reply_data *reply_base) 57 { 58 const struct pause_reply_data *data = PAUSE_REPDATA(reply_base); 59 const struct ethtool_pauseparam *pauseparam = &data->pauseparam; 60 61 if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) || 62 nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) || 63 nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause)) 64 return -EMSGSIZE; 65 66 return 0; 67 } 68 69 const struct ethnl_request_ops ethnl_pause_request_ops = { 70 .request_cmd = ETHTOOL_MSG_PAUSE_GET, 71 .reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY, 72 .hdr_attr = ETHTOOL_A_PAUSE_HEADER, 73 .max_attr = ETHTOOL_A_PAUSE_MAX, 74 .req_info_size = sizeof(struct pause_req_info), 75 .reply_data_size = sizeof(struct pause_reply_data), 76 .request_policy = pause_get_policy, 77 78 .prepare_data = pause_prepare_data, 79 .reply_size = pause_reply_size, 80 .fill_reply = pause_fill_reply, 81 }; 82 83 /* PAUSE_SET */ 84 85 static const struct nla_policy 86 pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1] = { 87 [ETHTOOL_A_PAUSE_UNSPEC] = { .type = NLA_REJECT }, 88 [ETHTOOL_A_PAUSE_HEADER] = { .type = NLA_NESTED }, 89 [ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_U8 }, 90 [ETHTOOL_A_PAUSE_RX] = { .type = NLA_U8 }, 91 [ETHTOOL_A_PAUSE_TX] = { .type = NLA_U8 }, 92 }; 93 94 int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info) 95 { 96 struct nlattr *tb[ETHTOOL_A_PAUSE_MAX + 1]; 97 struct ethtool_pauseparam params = {}; 98 struct ethnl_req_info req_info = {}; 99 const struct ethtool_ops *ops; 100 struct net_device *dev; 101 bool mod = false; 102 int ret; 103 104 ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_PAUSE_MAX, 105 pause_set_policy, info->extack); 106 if (ret < 0) 107 return ret; 108 ret = ethnl_parse_header_dev_get(&req_info, 109 tb[ETHTOOL_A_PAUSE_HEADER], 110 genl_info_net(info), info->extack, 111 true); 112 if (ret < 0) 113 return ret; 114 dev = req_info.dev; 115 ops = dev->ethtool_ops; 116 ret = -EOPNOTSUPP; 117 if (!ops->get_pauseparam || !ops->set_pauseparam) 118 goto out_dev; 119 120 rtnl_lock(); 121 ret = ethnl_ops_begin(dev); 122 if (ret < 0) 123 goto out_rtnl; 124 ops->get_pauseparam(dev, ¶ms); 125 126 ethnl_update_bool32(¶ms.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod); 127 ethnl_update_bool32(¶ms.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod); 128 ethnl_update_bool32(¶ms.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod); 129 ret = 0; 130 if (!mod) 131 goto out_ops; 132 133 ret = dev->ethtool_ops->set_pauseparam(dev, ¶ms); 134 135 out_ops: 136 ethnl_ops_complete(dev); 137 out_rtnl: 138 rtnl_unlock(); 139 out_dev: 140 dev_put(dev); 141 return ret; 142 } 143