[PATCH net-next] net: rtnetlink: add rx_otherhost_dropped for struct rtnl_link_stats

From: Yajun Deng
Date: Fri Jul 08 2022 - 02:33:19 EST


The commit 794c24e9921f ("net-core: rx_otherhost_dropped to core_stats")
introduce rx_otherhost_dropped, add rx_otherhost_dropped for struct
rtnl_link_stats to keep sync with struct rtnl_link_stats64.

As the same time, add BUILD_BUG_ON() in copy_rtnl_link_stats().

Signed-off-by: Yajun Deng <yajun.deng@xxxxxxxxx>
---
include/uapi/linux/if_link.h | 1 +
net/core/rtnetlink.c | 36 +++++++-----------------------------
2 files changed, 8 insertions(+), 29 deletions(-)

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index e36d9d2c65a7..fd6776d665c8 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -37,6 +37,7 @@ struct rtnl_link_stats {
__u32 tx_compressed;

__u32 rx_nohandler;
+ __u32 rx_otherhost_dropped;
};

/**
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index ac45328607f7..818649850b2c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -908,35 +908,13 @@ static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
const struct rtnl_link_stats64 *b)
{
- a->rx_packets = b->rx_packets;
- a->tx_packets = b->tx_packets;
- a->rx_bytes = b->rx_bytes;
- a->tx_bytes = b->tx_bytes;
- a->rx_errors = b->rx_errors;
- a->tx_errors = b->tx_errors;
- a->rx_dropped = b->rx_dropped;
- a->tx_dropped = b->tx_dropped;
-
- a->multicast = b->multicast;
- a->collisions = b->collisions;
-
- a->rx_length_errors = b->rx_length_errors;
- a->rx_over_errors = b->rx_over_errors;
- a->rx_crc_errors = b->rx_crc_errors;
- a->rx_frame_errors = b->rx_frame_errors;
- a->rx_fifo_errors = b->rx_fifo_errors;
- a->rx_missed_errors = b->rx_missed_errors;
-
- a->tx_aborted_errors = b->tx_aborted_errors;
- a->tx_carrier_errors = b->tx_carrier_errors;
- a->tx_fifo_errors = b->tx_fifo_errors;
- a->tx_heartbeat_errors = b->tx_heartbeat_errors;
- a->tx_window_errors = b->tx_window_errors;
-
- a->rx_compressed = b->rx_compressed;
- a->tx_compressed = b->tx_compressed;
-
- a->rx_nohandler = b->rx_nohandler;
+ size_t i, n = sizeof(*b) / sizeof(u64);
+ const u64 *src = (const u64 *)b;
+ u32 *dst = (u32 *)a;
+
+ BUILD_BUG_ON(n != sizeof(*a) / sizeof(u32));
+ for (i = 0; i < n; i++)
+ dst[i] = src[i];
}

/* All VF info */
--
2.25.1