From: subashab@codeaurora.org
To: Taehee Yoo <ap420073@gmail.com>
Cc: davem@davemloft.net, kuba@kernel.org, stranche@codeaurora.org,
netdev@vger.kernel.org
Subject: Re: [PATCH net 06/10] net: rmnet: print error message when command fails
Date: Wed, 26 Feb 2020 13:37:17 -0700 [thread overview]
Message-ID: <84eb4ca7add20145fc427c3183d67ef6@codeaurora.org> (raw)
In-Reply-To: <20200226174740.5636-1-ap420073@gmail.com>
On 2020-02-26 10:47, Taehee Yoo wrote:
> When rmnet netlink command fails, it doesn't print any error message.
> So, users couldn't know the exact reason.
> In order to tell the exact reason to the user, the extack error message
> is used in this patch.
>
> Signed-off-by: Taehee Yoo <ap420073@gmail.com>
> ---
> .../ethernet/qualcomm/rmnet/rmnet_config.c | 26 ++++++++++++-------
> .../net/ethernet/qualcomm/rmnet/rmnet_vnd.c | 10 +++----
> .../net/ethernet/qualcomm/rmnet/rmnet_vnd.h | 3 ++-
> 3 files changed, 24 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
> b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
> index c8b1bfe127ac..93745cd45c29 100644
> --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
> +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
> @@ -141,11 +141,10 @@ static int rmnet_newlink(struct net *src_net,
> struct net_device *dev,
> }
>
> real_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
> - if (!real_dev || !dev)
> + if (!real_dev || !dev) {
> + NL_SET_ERR_MSG_MOD(extack, "link does not exist");
> return -ENODEV;
> -
> - if (!data[IFLA_RMNET_MUX_ID])
> - return -EINVAL;
> + }
>
> ep = kzalloc(sizeof(*ep), GFP_ATOMIC);
> if (!ep)
> @@ -158,7 +157,7 @@ static int rmnet_newlink(struct net *src_net,
> struct net_device *dev,
> goto err0;
>
> port = rmnet_get_port_rtnl(real_dev);
> - err = rmnet_vnd_newlink(mux_id, dev, port, real_dev, ep);
> + err = rmnet_vnd_newlink(mux_id, dev, port, real_dev, ep, extack);
> if (err)
> goto err1;
>
> @@ -275,12 +274,16 @@ static int rmnet_rtnl_validate(struct nlattr
> *tb[], struct nlattr *data[],
> {
> u16 mux_id;
>
> - if (!data || !data[IFLA_RMNET_MUX_ID])
> + if (!data || !data[IFLA_RMNET_MUX_ID]) {
> + NL_SET_ERR_MSG_MOD(extack, "MUX ID not specifies");
> return -EINVAL;
> + }
>
> mux_id = nla_get_u16(data[IFLA_RMNET_MUX_ID]);
> - if (mux_id > (RMNET_MAX_LOGICAL_EP - 1))
> + if (mux_id > (RMNET_MAX_LOGICAL_EP - 1)) {
> + NL_SET_ERR_MSG_MOD(extack, "invalid MUX ID");
> return -ERANGE;
> + }
>
> return 0;
> }
> @@ -414,11 +417,16 @@ int rmnet_add_bridge(struct net_device
> *rmnet_dev,
> /* If there is more than one rmnet dev attached, its probably being
> * used for muxing. Skip the briding in that case
> */
> - if (port->nr_rmnet_devs > 1)
> + if (port->nr_rmnet_devs > 1) {
> + NL_SET_ERR_MSG_MOD(extack, "more than one rmnet dev attached");
> return -EINVAL;
> + }
>
> - if (rmnet_is_real_dev_registered(slave_dev))
> + if (rmnet_is_real_dev_registered(slave_dev)) {
> + NL_SET_ERR_MSG_MOD(extack,
> + "dev is already attached another rmnet dev");
> return -EBUSY;
> + }
>
> err = rmnet_register_real_device(slave_dev);
> if (err)
> diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
> b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
> index a26e76e9d382..90c19033ebe0 100644
> --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
> +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
> @@ -224,16 +224,16 @@ void rmnet_vnd_setup(struct net_device
> *rmnet_dev)
> int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
> struct rmnet_port *port,
> struct net_device *real_dev,
> - struct rmnet_endpoint *ep)
> + struct rmnet_endpoint *ep,
> + struct netlink_ext_ack *extack)
> {
> struct rmnet_priv *priv = netdev_priv(rmnet_dev);
> int rc;
>
> - if (ep->egress_dev)
> - return -EINVAL;
> -
> - if (rmnet_get_endpoint(port, id))
> + if (rmnet_get_endpoint(port, id)) {
> + NL_SET_ERR_MSG_MOD(extack, "MUX ID already exists");
> return -EBUSY;
> + }
>
> rmnet_dev->hw_features = NETIF_F_RXCSUM;
> rmnet_dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.h
> b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.h
> index 54cbaf3c3bc4..d8fa76e8e9c4 100644
> --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.h
> +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.h
> @@ -11,7 +11,8 @@ int rmnet_vnd_do_flow_control(struct net_device
> *dev, int enable);
> int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
> struct rmnet_port *port,
> struct net_device *real_dev,
> - struct rmnet_endpoint *ep);
> + struct rmnet_endpoint *ep,
> + struct netlink_ext_ack *extack);
> int rmnet_vnd_dellink(u8 id, struct rmnet_port *port,
> struct rmnet_endpoint *ep);
> void rmnet_vnd_rx_fixup(struct sk_buff *skb, struct net_device *dev);
This patch and [PATCH net 02/10] "net: rmnet: add missing module alias"
seem
to be adding new functionality. Perhaps it can be sent to net-next
instead
of net.
next prev parent reply other threads:[~2020-02-26 20:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 17:47 [PATCH net 06/10] net: rmnet: print error message when command fails Taehee Yoo
2020-02-26 20:37 ` subashab [this message]
2020-02-27 7:36 ` Taehee Yoo
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