ethtool: add support to set/get tx copybreak buf size via ethtool

Add support for ethtool to set/get tx copybreak buf size.

Signed-off-by: Hao Chen <chenhao288@hisilicon.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index a2223b6..7bc4b8d 100644 (file)
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -231,6 +231,7 @@ enum tunable_id {
        ETHTOOL_RX_COPYBREAK,
        ETHTOOL_TX_COPYBREAK,
        ETHTOOL_PFC_PREVENTION_TOUT, /* timeout in msecs */
+       ETHTOOL_TX_COPYBREAK_BUF_SIZE,
        /*
         * Add your fresh new tunable attribute above and remember to update
         * tunable_strings[] in net/ethtool/common.c

diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index c63e073..0c52100 100644 (file)
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -89,6 +89,7 @@ tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
        [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
        [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
        [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
+       [ETHTOOL_TX_COPYBREAK_BUF_SIZE] = "tx-copybreak-buf-size",
 };
 
 const char

diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 65e9bc1..5c5f170 100644 (file)
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2396,6 +2396,7 @@ static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
        switch (tuna->id) {
        case ETHTOOL_RX_COPYBREAK:
        case ETHTOOL_TX_COPYBREAK:
+       case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
                if (tuna->len != sizeof(u32) ||
                    tuna->type_id != ETHTOOL_TUNABLE_U32)
                        return -EINVAL;