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IB/ipoib: Add readout of statistics using ethtool
IPoIB collects statistics of traffic including number of packets sent/received, number of bytes transferred, and certain errors. This patch makes these statistics available to be queried by ethtool. Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@oracle.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Tested-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -36,6 +36,27 @@
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#include "ipoib.h"
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struct ipoib_stats {
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char stat_string[ETH_GSTRING_LEN];
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int stat_offset;
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};
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#define IPOIB_NETDEV_STAT(m) { \
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.stat_string = #m, \
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.stat_offset = offsetof(struct rtnl_link_stats64, m) }
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static const struct ipoib_stats ipoib_gstrings_stats[] = {
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IPOIB_NETDEV_STAT(rx_packets),
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IPOIB_NETDEV_STAT(tx_packets),
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IPOIB_NETDEV_STAT(rx_bytes),
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IPOIB_NETDEV_STAT(tx_bytes),
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IPOIB_NETDEV_STAT(tx_errors),
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IPOIB_NETDEV_STAT(rx_dropped),
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IPOIB_NETDEV_STAT(tx_dropped)
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};
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#define IPOIB_GLOBAL_STATS_LEN ARRAY_SIZE(ipoib_gstrings_stats)
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static void ipoib_get_drvinfo(struct net_device *netdev,
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struct ethtool_drvinfo *drvinfo)
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{
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@ -92,11 +113,57 @@ static int ipoib_set_coalesce(struct net_device *dev,
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return 0;
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}
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static void ipoib_get_ethtool_stats(struct net_device *dev,
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struct ethtool_stats __always_unused *stats,
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u64 *data)
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{
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int i;
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struct net_device_stats *net_stats = &dev->stats;
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u8 *p = (u8 *)net_stats;
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for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)
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data[i] = *(u64 *)(p + ipoib_gstrings_stats[i].stat_offset);
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}
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static void ipoib_get_strings(struct net_device __always_unused *dev,
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u32 stringset, u8 *data)
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{
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u8 *p = data;
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int i;
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switch (stringset) {
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case ETH_SS_STATS:
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for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++) {
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memcpy(p, ipoib_gstrings_stats[i].stat_string,
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ETH_GSTRING_LEN);
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p += ETH_GSTRING_LEN;
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}
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break;
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case ETH_SS_TEST:
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default:
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break;
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}
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}
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static int ipoib_get_sset_count(struct net_device __always_unused *dev,
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int sset)
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{
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switch (sset) {
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case ETH_SS_STATS:
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return IPOIB_GLOBAL_STATS_LEN;
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case ETH_SS_TEST:
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default:
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break;
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}
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return -EOPNOTSUPP;
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}
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static const struct ethtool_ops ipoib_ethtool_ops = {
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.get_drvinfo = ipoib_get_drvinfo,
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.get_coalesce = ipoib_get_coalesce,
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.set_coalesce = ipoib_set_coalesce,
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.get_strings = ipoib_get_strings,
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.get_ethtool_stats = ipoib_get_ethtool_stats,
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.get_sset_count = ipoib_get_sset_count,
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};
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void ipoib_set_ethtool_ops(struct net_device *dev)
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