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Date: Wed, 24 Jul 2019 19:12:18 +0000
From: Saeed Mahameed <saeedm@...lanox.com>
To: "tanhuazhong@...wei.com" <tanhuazhong@...wei.com>,
"davem@...emloft.net" <davem@...emloft.net>
CC: "lipeng321@...wei.com" <lipeng321@...wei.com>,
"yisen.zhuang@...wei.com" <yisen.zhuang@...wei.com>,
"salil.mehta@...wei.com" <salil.mehta@...wei.com>,
"linuxarm@...wei.com" <linuxarm@...wei.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"liuyonglong@...wei.com" <liuyonglong@...wei.com>
Subject: Re: [PATCH net-next 07/11] net: hns3: adds debug messages to identify
eth down cause
On Wed, 2019-07-24 at 11:18 +0800, Huazhong Tan wrote:
> From: Yonglong Liu <liuyonglong@...wei.com>
>
> Some times just see the eth interface have been down/up via
> dmesg, but can not know why the eth down. So adds some debug
> messages to identify the cause for this.
>
I really don't like this. your default msg lvl has NETIF_MSG_IFDOWN
turned on .. dumping every single operation that happens on your device
by default to kernel log is too much !
We should really consider using trace buffers with well defined
structures for vendor specific events. so we can use bpf filters and
state of the art tools for netdev debugging.
> Signed-off-by: Yonglong Liu <liuyonglong@...wei.com>
> Signed-off-by: Peng Li <lipeng321@...wei.com>
> Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
> ---
> drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 24
> ++++++++++++++++++++
> drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 26
> ++++++++++++++++++++++
> .../net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c | 14 ++++++++++++
> 3 files changed, 64 insertions(+)
>
> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
> b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
> index 4d58c53..cff5d59 100644
> --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
> @@ -459,6 +459,10 @@ static int hns3_nic_net_open(struct net_device
> *netdev)
> h->ae_algo->ops->set_timer_task(priv->ae_handle, true);
>
> hns3_config_xps(priv);
> +
> + if (netif_msg_ifup(h))
> + netdev_info(netdev, "net open\n");
> +
> return 0;
> }
>
> @@ -519,6 +523,9 @@ static int hns3_nic_net_stop(struct net_device
> *netdev)
> if (test_and_set_bit(HNS3_NIC_STATE_DOWN, &priv->state))
> return 0;
>
> + if (netif_msg_ifdown(h))
> + netdev_info(netdev, "net stop\n");
> +
> if (h->ae_algo->ops->set_timer_task)
> h->ae_algo->ops->set_timer_task(priv->ae_handle,
> false);
>
> @@ -1550,6 +1557,9 @@ static int hns3_setup_tc(struct net_device
> *netdev, void *type_data)
> h = hns3_get_handle(netdev);
> kinfo = &h->kinfo;
>
> + if (netif_msg_ifdown(h))
> + netdev_info(netdev, "setup tc: num_tc=%d\n", tc);
> +
> return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
> kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP;
> }
> @@ -1593,6 +1603,11 @@ static int hns3_ndo_set_vf_vlan(struct
> net_device *netdev, int vf, u16 vlan,
> struct hnae3_handle *h = hns3_get_handle(netdev);
> int ret = -EIO;
>
> + if (netif_msg_ifdown(h))
why msg_ifdown ? looks like netif_msg_drv is more appropriate, for many
of the cases in this patch.
> + netdev_info(netdev,
> + "set vf vlan: vf=%d, vlan=%d, qos=%d,
> vlan_proto=%d\n",
> + vf, vlan, qos, vlan_proto);
> +
> if (h->ae_algo->ops->set_vf_vlan_filter)
> ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
> qos,
> vlan_proto);
> @@ -1611,6 +1626,10 @@ static int hns3_nic_change_mtu(struct
> net_device *netdev, int new_mtu)
> if (!h->ae_algo->ops->set_mtu)
> return -EOPNOTSUPP;
>
> + if (netif_msg_ifdown(h))
> + netdev_info(netdev, "change mtu from %d to %d\n",
> + netdev->mtu, new_mtu);
> +
> ret = h->ae_algo->ops->set_mtu(h, new_mtu);
> if (ret)
> netdev_err(netdev, "failed to change MTU in hardware
> %d\n",
> @@ -4395,6 +4414,11 @@ int hns3_set_channels(struct net_device
> *netdev,
> if (kinfo->rss_size == new_tqp_num)
> return 0;
>
> + if (netif_msg_ifdown(h))
> + netdev_info(netdev,
> + "set channels: tqp_num=%d, rxfh=%d\n",
> + new_tqp_num, rxfh_configured);
> +
> ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT);
> if (ret)
> return ret;
> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> index e71c92b..edb9845 100644
> --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
> @@ -311,6 +311,9 @@ static void hns3_self_test(struct net_device
> *ndev,
> if (eth_test->flags != ETH_TEST_FL_OFFLINE)
> return;
>
> + if (netif_msg_ifdown(h))
> + netdev_info(ndev, "self test start\n");
> +
> st_param[HNAE3_LOOP_APP][0] = HNAE3_LOOP_APP;
> st_param[HNAE3_LOOP_APP][1] =
> h->flags & HNAE3_SUPPORT_APP_LOOPBACK;
> @@ -374,6 +377,9 @@ static void hns3_self_test(struct net_device
> *ndev,
>
> if (if_running)
> ndev->netdev_ops->ndo_open(ndev);
> +
> + if (netif_msg_ifdown(h))
> + netdev_info(ndev, "self test end\n");
> }
>
> static int hns3_get_sset_count(struct net_device *netdev, int
> stringset)
> @@ -604,6 +610,11 @@ static int hns3_set_pauseparam(struct net_device
> *netdev,
> {
> struct hnae3_handle *h = hns3_get_handle(netdev);
>
> + if (netif_msg_ifdown(h))
> + netdev_info(netdev,
> + "set pauseparam: autoneg=%d, rx:%d,
> tx:%d\n",
> + param->autoneg, param->rx_pause, param-
> >tx_pause);
> +
> if (h->ae_algo->ops->set_pauseparam)
> return h->ae_algo->ops->set_pauseparam(h, param-
> >autoneg,
> param->rx_pause,
> @@ -743,6 +754,13 @@ static int hns3_set_link_ksettings(struct
> net_device *netdev,
> if (cmd->base.speed == SPEED_1000 && cmd->base.duplex ==
> DUPLEX_HALF)
> return -EINVAL;
>
> + if (netif_msg_ifdown(handle))
> + netdev_info(netdev,
> + "set link(%s): autoneg=%d, speed=%d,
> duplex=%d\n",
> + netdev->phydev ? "phy" : "mac",
> + cmd->base.autoneg, cmd->base.speed,
> + cmd->base.duplex);
> +
> /* Only support ksettings_set for netdev with phy attached for
> now */
> if (netdev->phydev)
> return phy_ethtool_ksettings_set(netdev->phydev, cmd);
> @@ -984,6 +1002,10 @@ static int hns3_nway_reset(struct net_device
> *netdev)
> return -EINVAL;
> }
>
> + if (netif_msg_ifdown(handle))
> + netdev_info(netdev, "nway reset (using %s)\n",
> + phy ? "phy" : "mac");
> +
> if (phy)
> return genphy_restart_aneg(phy);
>
> @@ -1308,6 +1330,10 @@ static int hns3_set_fecparam(struct net_device
> *netdev,
> if (!ops->set_fec)
> return -EOPNOTSUPP;
> fec_mode = eth_to_loc_fec(fec->fec);
> +
> + if (netif_msg_ifdown(handle))
> + netdev_info(netdev, "set fecparam: mode=%d\n",
> fec_mode);
> +
> return ops->set_fec(handle, fec_mode);
> }
>
> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
> b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
> index bac4ce1..133e7c6 100644
> --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
> @@ -201,6 +201,7 @@ static int hclge_client_setup_tc(struct hclge_dev
> *hdev)
> static int hclge_ieee_setets(struct hnae3_handle *h, struct ieee_ets
> *ets)
> {
> struct hclge_vport *vport = hclge_get_vport(h);
> + struct net_device *netdev = h->kinfo.netdev;
> struct hclge_dev *hdev = vport->back;
> bool map_changed = false;
> u8 num_tc = 0;
> @@ -215,6 +216,9 @@ static int hclge_ieee_setets(struct hnae3_handle
> *h, struct ieee_ets *ets)
> return ret;
>
> if (map_changed) {
> + if (netif_msg_ifdown(h))
> + netdev_info(netdev, "set ets\n");
> +
> ret = hclge_notify_client(hdev, HNAE3_DOWN_CLIENT);
> if (ret)
> return ret;
> @@ -300,6 +304,7 @@ static int hclge_ieee_getpfc(struct hnae3_handle
> *h, struct ieee_pfc *pfc)
> static int hclge_ieee_setpfc(struct hnae3_handle *h, struct ieee_pfc
> *pfc)
> {
> struct hclge_vport *vport = hclge_get_vport(h);
> + struct net_device *netdev = h->kinfo.netdev;
> struct hclge_dev *hdev = vport->back;
> u8 i, j, pfc_map, *prio_tc;
>
> @@ -325,6 +330,11 @@ static int hclge_ieee_setpfc(struct hnae3_handle
> *h, struct ieee_pfc *pfc)
> hdev->tm_info.hw_pfc_map = pfc_map;
> hdev->tm_info.pfc_en = pfc->pfc_en;
>
> + if (netif_msg_ifdown(h))
> + netdev_info(netdev,
> + "set pfc: pfc_en=%d, pfc_map=%d,
> num_tc=%d\n",
> + pfc->pfc_en, pfc_map, hdev-
> >tm_info.num_tc);
> +
> hclge_tm_pfc_info_update(hdev);
>
> return hclge_pause_setup_hw(hdev, false);
> @@ -345,8 +355,12 @@ static u8 hclge_getdcbx(struct hnae3_handle *h)
> static u8 hclge_setdcbx(struct hnae3_handle *h, u8 mode)
> {
> struct hclge_vport *vport = hclge_get_vport(h);
> + struct net_device *netdev = h->kinfo.netdev;
> struct hclge_dev *hdev = vport->back;
>
> + if (netif_msg_drv(h))
> + netdev_info(netdev, "set dcbx: mode=%d\n", mode);
> +
> /* No support for LLD_MANAGED modes or CEE */
> if ((mode & DCB_CAP_DCBX_LLD_MANAGED) ||
> (mode & DCB_CAP_DCBX_VER_CEE) ||
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