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| 1 | +// SPDX-License-Identifier: GPL-2.0-only |
| 2 | + |
| 3 | +#include "netlink.h" |
| 4 | +#include "common.h" |
| 5 | +#include "bitset.h" |
| 6 | + |
| 7 | +struct stats_req_info { |
| 8 | + struct ethnl_req_info base; |
| 9 | + DECLARE_BITMAP(stat_mask, __ETHTOOL_STATS_CNT); |
| 10 | +}; |
| 11 | + |
| 12 | +#define STATS_REQINFO(__req_base) \ |
| 13 | + container_of(__req_base, struct stats_req_info, base) |
| 14 | + |
| 15 | +struct stats_reply_data { |
| 16 | + struct ethnl_reply_data base; |
| 17 | + struct ethtool_eth_phy_stats phy_stats; |
| 18 | +}; |
| 19 | + |
| 20 | +#define STATS_REPDATA(__reply_base) \ |
| 21 | + container_of(__reply_base, struct stats_reply_data, base) |
| 22 | + |
| 23 | +const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN] = { |
| 24 | + [ETHTOOL_STATS_ETH_PHY] = "eth-phy", |
| 25 | +}; |
| 26 | + |
| 27 | +const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN] = { |
| 28 | + [ETHTOOL_A_STATS_ETH_PHY_5_SYM_ERR] = "SymbolErrorDuringCarrier", |
| 29 | +}; |
| 30 | + |
| 31 | +const struct nla_policy ethnl_stats_get_policy[ETHTOOL_A_STATS_GROUPS + 1] = { |
| 32 | + [ETHTOOL_A_STATS_HEADER] = |
| 33 | + NLA_POLICY_NESTED(ethnl_header_policy), |
| 34 | + [ETHTOOL_A_STATS_GROUPS] = { .type = NLA_NESTED }, |
| 35 | +}; |
| 36 | + |
| 37 | +static int stats_parse_request(struct ethnl_req_info *req_base, |
| 38 | + struct nlattr **tb, |
| 39 | + struct netlink_ext_ack *extack) |
| 40 | +{ |
| 41 | + struct stats_req_info *req_info = STATS_REQINFO(req_base); |
| 42 | + bool mod = false; |
| 43 | + int err; |
| 44 | + |
| 45 | + err = ethnl_update_bitset(req_info->stat_mask, __ETHTOOL_STATS_CNT, |
| 46 | + tb[ETHTOOL_A_STATS_GROUPS], stats_std_names, |
| 47 | + extack, &mod); |
| 48 | + if (err) |
| 49 | + return err; |
| 50 | + |
| 51 | + if (!mod) { |
| 52 | + NL_SET_ERR_MSG(extack, "no stats requested"); |
| 53 | + return -EINVAL; |
| 54 | + } |
| 55 | + |
| 56 | + return 0; |
| 57 | +} |
| 58 | + |
| 59 | +static int stats_prepare_data(const struct ethnl_req_info *req_base, |
| 60 | + struct ethnl_reply_data *reply_base, |
| 61 | + struct genl_info *info) |
| 62 | +{ |
| 63 | + const struct stats_req_info *req_info = STATS_REQINFO(req_base); |
| 64 | + struct stats_reply_data *data = STATS_REPDATA(reply_base); |
| 65 | + struct net_device *dev = reply_base->dev; |
| 66 | + int ret; |
| 67 | + |
| 68 | + ret = ethnl_ops_begin(dev); |
| 69 | + if (ret < 0) |
| 70 | + return ret; |
| 71 | + |
| 72 | + memset(&data->phy_stats, 0xff, sizeof(data->phy_stats)); |
| 73 | + |
| 74 | + if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) && |
| 75 | + dev->ethtool_ops->get_eth_phy_stats) |
| 76 | + dev->ethtool_ops->get_eth_phy_stats(dev, &data->phy_stats); |
| 77 | + |
| 78 | + ethnl_ops_complete(dev); |
| 79 | + return 0; |
| 80 | +} |
| 81 | + |
| 82 | +static int stats_reply_size(const struct ethnl_req_info *req_base, |
| 83 | + const struct ethnl_reply_data *reply_base) |
| 84 | +{ |
| 85 | + const struct stats_req_info *req_info = STATS_REQINFO(req_base); |
| 86 | + unsigned int n_grps = 0, n_stats = 0; |
| 87 | + int len = 0; |
| 88 | + |
| 89 | + if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask)) { |
| 90 | + n_stats += sizeof(struct ethtool_eth_phy_stats) / sizeof(u64); |
| 91 | + n_grps++; |
| 92 | + } |
| 93 | + |
| 94 | + len += n_grps * (nla_total_size(0) + /* _A_STATS_GRP */ |
| 95 | + nla_total_size(4) + /* _A_STATS_GRP_ID */ |
| 96 | + nla_total_size(4)); /* _A_STATS_GRP_SS_ID */ |
| 97 | + len += n_stats * (nla_total_size(0) + /* _A_STATS_GRP_STAT */ |
| 98 | + nla_total_size_64bit(sizeof(u64))); |
| 99 | + |
| 100 | + return len; |
| 101 | +} |
| 102 | + |
| 103 | +static int stat_put(struct sk_buff *skb, u16 attrtype, u64 val) |
| 104 | +{ |
| 105 | + struct nlattr *nest; |
| 106 | + int ret; |
| 107 | + |
| 108 | + if (val == ETHTOOL_STAT_NOT_SET) |
| 109 | + return 0; |
| 110 | + |
| 111 | + /* We want to start stats attr types from 0, so we don't have a type |
| 112 | + * for pad inside ETHTOOL_A_STATS_GRP_STAT. Pad things on the outside |
| 113 | + * of ETHTOOL_A_STATS_GRP_STAT. Since we're one nest away from the |
| 114 | + * actual attr we're 4B off - nla_need_padding_for_64bit() & co. |
| 115 | + * can't be used. |
| 116 | + */ |
| 117 | +#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
| 118 | + if (!IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8)) |
| 119 | + if (!nla_reserve(skb, ETHTOOL_A_STATS_GRP_PAD, 0)) |
| 120 | + return -EMSGSIZE; |
| 121 | +#endif |
| 122 | + |
| 123 | + nest = nla_nest_start(skb, ETHTOOL_A_STATS_GRP_STAT); |
| 124 | + if (!nest) |
| 125 | + return -EMSGSIZE; |
| 126 | + |
| 127 | + ret = nla_put_u64_64bit(skb, attrtype, val, -1 /* not used */); |
| 128 | + if (ret) { |
| 129 | + nla_nest_cancel(skb, nest); |
| 130 | + return ret; |
| 131 | + } |
| 132 | + |
| 133 | + nla_nest_end(skb, nest); |
| 134 | + return 0; |
| 135 | +} |
| 136 | + |
| 137 | +static int stats_put_phy_stats(struct sk_buff *skb, |
| 138 | + const struct stats_reply_data *data) |
| 139 | +{ |
| 140 | + if (stat_put(skb, ETHTOOL_A_STATS_ETH_PHY_5_SYM_ERR, |
| 141 | + data->phy_stats.SymbolErrorDuringCarrier)) |
| 142 | + return -EMSGSIZE; |
| 143 | + return 0; |
| 144 | +} |
| 145 | + |
| 146 | +static int stats_put_stats(struct sk_buff *skb, |
| 147 | + const struct stats_reply_data *data, |
| 148 | + u32 id, u32 ss_id, |
| 149 | + int (*cb)(struct sk_buff *skb, |
| 150 | + const struct stats_reply_data *data)) |
| 151 | +{ |
| 152 | + struct nlattr *nest; |
| 153 | + |
| 154 | + nest = nla_nest_start(skb, ETHTOOL_A_STATS_GRP); |
| 155 | + if (!nest) |
| 156 | + return -EMSGSIZE; |
| 157 | + |
| 158 | + if (nla_put_u32(skb, ETHTOOL_A_STATS_GRP_ID, id) || |
| 159 | + nla_put_u32(skb, ETHTOOL_A_STATS_GRP_SS_ID, ss_id)) |
| 160 | + goto err_cancel; |
| 161 | + |
| 162 | + if (cb(skb, data)) |
| 163 | + goto err_cancel; |
| 164 | + |
| 165 | + nla_nest_end(skb, nest); |
| 166 | + return 0; |
| 167 | + |
| 168 | +err_cancel: |
| 169 | + nla_nest_cancel(skb, nest); |
| 170 | + return -EMSGSIZE; |
| 171 | +} |
| 172 | + |
| 173 | +static int stats_fill_reply(struct sk_buff *skb, |
| 174 | + const struct ethnl_req_info *req_base, |
| 175 | + const struct ethnl_reply_data *reply_base) |
| 176 | +{ |
| 177 | + const struct stats_req_info *req_info = STATS_REQINFO(req_base); |
| 178 | + const struct stats_reply_data *data = STATS_REPDATA(reply_base); |
| 179 | + int ret = 0; |
| 180 | + |
| 181 | + if (!ret && test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask)) |
| 182 | + ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_PHY, |
| 183 | + ETH_SS_STATS_ETH_PHY, |
| 184 | + stats_put_phy_stats); |
| 185 | + |
| 186 | + return ret; |
| 187 | +} |
| 188 | + |
| 189 | +const struct ethnl_request_ops ethnl_stats_request_ops = { |
| 190 | + .request_cmd = ETHTOOL_MSG_STATS_GET, |
| 191 | + .reply_cmd = ETHTOOL_MSG_STATS_GET_REPLY, |
| 192 | + .hdr_attr = ETHTOOL_A_STATS_HEADER, |
| 193 | + .req_info_size = sizeof(struct stats_req_info), |
| 194 | + .reply_data_size = sizeof(struct stats_reply_data), |
| 195 | + |
| 196 | + .parse_request = stats_parse_request, |
| 197 | + .prepare_data = stats_prepare_data, |
| 198 | + .reply_size = stats_reply_size, |
| 199 | + .fill_reply = stats_fill_reply, |
| 200 | +}; |
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