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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-04-23 04:02:05 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-04-23 04:02:05 -0300
commit394569928e2f17dff4ae367ac700048138e318c7 (patch)
treec789d2a2d107284e78f6c6558267b6984f518581 /drivers/net/bonding/bond_main.c
parentbdcfd44fb5b5fb8fd660e7f93f1095c507481024 (diff)
Linux-libre 4.5.2-gnupck-4.5.2-gnu
Diffstat (limited to 'drivers/net/bonding/bond_main.c')
-rw-r--r--drivers/net/bonding/bond_main.c65
1 files changed, 35 insertions, 30 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index b7f1a9919..5ec8195b0 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3308,6 +3308,30 @@ static int bond_close(struct net_device *bond_dev)
return 0;
}
+/* fold stats, assuming all rtnl_link_stats64 fields are u64, but
+ * that some drivers can provide 32bit values only.
+ */
+static void bond_fold_stats(struct rtnl_link_stats64 *_res,
+ const struct rtnl_link_stats64 *_new,
+ const struct rtnl_link_stats64 *_old)
+{
+ const u64 *new = (const u64 *)_new;
+ const u64 *old = (const u64 *)_old;
+ u64 *res = (u64 *)_res;
+ int i;
+
+ for (i = 0; i < sizeof(*_res) / sizeof(u64); i++) {
+ u64 nv = new[i];
+ u64 ov = old[i];
+
+ /* detects if this particular field is 32bit only */
+ if (((nv | ov) >> 32) == 0)
+ res[i] += (u32)nv - (u32)ov;
+ else
+ res[i] += nv - ov;
+ }
+}
+
static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
struct rtnl_link_stats64 *stats)
{
@@ -3316,43 +3340,23 @@ static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
struct list_head *iter;
struct slave *slave;
+ spin_lock(&bond->stats_lock);
memcpy(stats, &bond->bond_stats, sizeof(*stats));
- bond_for_each_slave(bond, slave, iter) {
- const struct rtnl_link_stats64 *sstats =
+ rcu_read_lock();
+ bond_for_each_slave_rcu(bond, slave, iter) {
+ const struct rtnl_link_stats64 *new =
dev_get_stats(slave->dev, &temp);
- struct rtnl_link_stats64 *pstats = &slave->slave_stats;
-
- stats->rx_packets += sstats->rx_packets - pstats->rx_packets;
- stats->rx_bytes += sstats->rx_bytes - pstats->rx_bytes;
- stats->rx_errors += sstats->rx_errors - pstats->rx_errors;
- stats->rx_dropped += sstats->rx_dropped - pstats->rx_dropped;
-
- stats->tx_packets += sstats->tx_packets - pstats->tx_packets;;
- stats->tx_bytes += sstats->tx_bytes - pstats->tx_bytes;
- stats->tx_errors += sstats->tx_errors - pstats->tx_errors;
- stats->tx_dropped += sstats->tx_dropped - pstats->tx_dropped;
-
- stats->multicast += sstats->multicast - pstats->multicast;
- stats->collisions += sstats->collisions - pstats->collisions;
-
- stats->rx_length_errors += sstats->rx_length_errors - pstats->rx_length_errors;
- stats->rx_over_errors += sstats->rx_over_errors - pstats->rx_over_errors;
- stats->rx_crc_errors += sstats->rx_crc_errors - pstats->rx_crc_errors;
- stats->rx_frame_errors += sstats->rx_frame_errors - pstats->rx_frame_errors;
- stats->rx_fifo_errors += sstats->rx_fifo_errors - pstats->rx_fifo_errors;
- stats->rx_missed_errors += sstats->rx_missed_errors - pstats->rx_missed_errors;
-
- stats->tx_aborted_errors += sstats->tx_aborted_errors - pstats->tx_aborted_errors;
- stats->tx_carrier_errors += sstats->tx_carrier_errors - pstats->tx_carrier_errors;
- stats->tx_fifo_errors += sstats->tx_fifo_errors - pstats->tx_fifo_errors;
- stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors - pstats->tx_heartbeat_errors;
- stats->tx_window_errors += sstats->tx_window_errors - pstats->tx_window_errors;
+
+ bond_fold_stats(stats, new, &slave->slave_stats);
/* save off the slave stats for the next run */
- memcpy(pstats, sstats, sizeof(*sstats));
+ memcpy(&slave->slave_stats, new, sizeof(*new));
}
+ rcu_read_unlock();
+
memcpy(&bond->bond_stats, stats, sizeof(*stats));
+ spin_unlock(&bond->stats_lock);
return stats;
}
@@ -4166,6 +4170,7 @@ void bond_setup(struct net_device *bond_dev)
struct bonding *bond = netdev_priv(bond_dev);
spin_lock_init(&bond->mode_lock);
+ spin_lock_init(&bond->stats_lock);
bond->params = bonding_defaults;
/* Initialize pointers */