net/ethtool/tsinfo.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include <linux/net_tstamp.h>
   4
   5 #include "netlink.h"
   6 #include "common.h"
   7 #include "bitset.h"
   8
   9 struct tsinfo_req_info {
  10         struct ethnl_req_info           base;
  11 };
  12
  13 struct tsinfo_reply_data {
  14         struct ethnl_reply_data         base;
  15         struct ethtool_ts_info          ts_info;
  16 };
  17
  18 #define TSINFO_REPDATA(__reply_base) \
  19         container_of(__reply_base, struct tsinfo_reply_data, base)
  20
  21 static const struct nla_policy
  22 tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1] = {
  23         [ETHTOOL_A_TSINFO_UNSPEC]               = { .type = NLA_REJECT },
  24         [ETHTOOL_A_TSINFO_HEADER]               = { .type = NLA_NESTED },
  25         [ETHTOOL_A_TSINFO_TIMESTAMPING]         = { .type = NLA_REJECT },
  26         [ETHTOOL_A_TSINFO_TX_TYPES]             = { .type = NLA_REJECT },
  27         [ETHTOOL_A_TSINFO_RX_FILTERS]           = { .type = NLA_REJECT },
  28         [ETHTOOL_A_TSINFO_PHC_INDEX]            = { .type = NLA_REJECT },
  29 };
  30
  31 static int tsinfo_prepare_data(const struct ethnl_req_info *req_base,
  32                                struct ethnl_reply_data *reply_base,
  33                                struct genl_info *info)
  34 {
  35         struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
  36         struct net_device *dev = reply_base->dev;
  37         int ret;
  38
  39         ret = ethnl_ops_begin(dev);
  40         if (ret < 0)
  41                 return ret;
  42         ret = __ethtool_get_ts_info(dev, &data->ts_info);
  43         ethnl_ops_complete(dev);
  44
  45         return ret;
  46 }
  47
  48 static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
  49                              const struct ethnl_reply_data *reply_base)
  50 {
  51         const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
  52         bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
  53         const struct ethtool_ts_info *ts_info = &data->ts_info;
  54         int len = 0;
  55         int ret;
  56
  57         BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32);
  58         BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32);
  59         BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32);
  60
  61         if (ts_info->so_timestamping) {
  62                 ret = ethnl_bitset32_size(&ts_info->so_timestamping, NULL,
  63                                           __SOF_TIMESTAMPING_CNT,
  64                                           sof_timestamping_names, compact);
  65                 if (ret < 0)
  66                         return ret;
  67                 len += ret;     /* _TSINFO_TIMESTAMPING */
  68         }
  69         if (ts_info->tx_types) {
  70                 ret = ethnl_bitset32_size(&ts_info->tx_types, NULL,
  71                                           __HWTSTAMP_TX_CNT,
  72                                           ts_tx_type_names, compact);
  73                 if (ret < 0)
  74                         return ret;
  75                 len += ret;     /* _TSINFO_TX_TYPES */
  76         }
  77         if (ts_info->rx_filters) {
  78                 ret = ethnl_bitset32_size(&ts_info->rx_filters, NULL,
  79                                           __HWTSTAMP_FILTER_CNT,
  80                                           ts_rx_filter_names, compact);
  81                 if (ret < 0)
  82                         return ret;
  83                 len += ret;     /* _TSINFO_RX_FILTERS */
  84         }
  85         if (ts_info->phc_index >= 0)
  86                 len += nla_total_size(sizeof(u32));     /* _TSINFO_PHC_INDEX */
  87
  88         return len;
  89 }
  90
  91 static int tsinfo_fill_reply(struct sk_buff *skb,
  92                              const struct ethnl_req_info *req_base,
  93                              const struct ethnl_reply_data *reply_base)
  94 {
  95         const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
  96         bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
  97         const struct ethtool_ts_info *ts_info = &data->ts_info;
  98         int ret;
  99
 100         if (ts_info->so_timestamping) {
 101                 ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TIMESTAMPING,
 102                                          &ts_info->so_timestamping, NULL,
 103                                          __SOF_TIMESTAMPING_CNT,
 104                                          sof_timestamping_names, compact);
 105                 if (ret < 0)
 106                         return ret;
 107         }
 108         if (ts_info->tx_types) {
 109                 ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TX_TYPES,
 110                                          &ts_info->tx_types, NULL,
 111                                          __HWTSTAMP_TX_CNT,
 112                                          ts_tx_type_names, compact);
 113                 if (ret < 0)
 114                         return ret;
 115         }
 116         if (ts_info->rx_filters) {
 117                 ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_RX_FILTERS,
 118                                          &ts_info->rx_filters, NULL,
 119                                          __HWTSTAMP_FILTER_CNT,
 120                                          ts_rx_filter_names, compact);
 121                 if (ret < 0)
 122                         return ret;
 123         }
 124         if (ts_info->phc_index >= 0 &&
 125             nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX, ts_info->phc_index))
 126                 return -EMSGSIZE;
 127
 128         return 0;
 129 }
 130
 131 const struct ethnl_request_ops ethnl_tsinfo_request_ops = {
 132         .request_cmd            = ETHTOOL_MSG_TSINFO_GET,
 133         .reply_cmd              = ETHTOOL_MSG_TSINFO_GET_REPLY,
 134         .hdr_attr               = ETHTOOL_A_TSINFO_HEADER,
 135         .max_attr               = ETHTOOL_A_TSINFO_MAX,
 136         .req_info_size          = sizeof(struct tsinfo_req_info),
 137         .reply_data_size        = sizeof(struct tsinfo_reply_data),
 138         .request_policy         = tsinfo_get_policy,
 139
 140         .prepare_data           = tsinfo_prepare_data,
 141         .reply_size             = tsinfo_reply_size,
 142         .fill_reply             = tsinfo_fill_reply,
 143 };