[PATCH v4 3/8] ethlog: option to enable/disable promisc mode

[Johannes Zink]

Hi Oleksij,

On Tue, 2022-11-08 at 07:10 +0100, Oleksij Rempel wrote:
> Add -p option to control promisc mode of the ethrnet device.
> 
just found a small typo: s/ethrnet/ethernet/

Best regards
Johannes

> Example:
> ethlog -p eth0 - will enable promisc mode and logging on the eth0
> device
> ethlog -rp eth0 - will disable promisc mode and logging on the eth0
> device
> 
> All the same commands without "-p" option will not touch promisc
> configuration.
> 
> Signed-off-by: Oleksij Rempel <o.rempel at pengutronix.de>
> ---
>  commands/ethlog.c | 21 +++++++++++++++++----
>  1 file changed, 17 insertions(+), 4 deletions(-)
> 
> diff --git a/commands/ethlog.c b/commands/ethlog.c
> index 0cc93ba808..7885d32c6b 100644
> --- a/commands/ethlog.c
> +++ b/commands/ethlog.c
> @@ -29,11 +29,14 @@ static int do_ethlog(int argc, char *argv[])
>  {
>         struct eth_device *edev;
>         const char *edevname;
> -       bool remove = false;
> -       int opt;
> +       bool remove = false, promisc = false;
> +       int opt, ret;
>  
> -       while ((opt = getopt(argc, argv, "r")) > 0) {
> +       while ((opt = getopt(argc, argv, "pr")) > 0) {
>                 switch (opt) {
> +               case 'p':
> +                       promisc = true;
> +                       break;
>                 case 'r':
>                         remove = true;
>                         break;
> @@ -56,10 +59,19 @@ static int do_ethlog(int argc, char *argv[])
>         if (remove) {
>                 edev->tx_monitor = NULL;
>                 edev->rx_monitor = NULL;
> +               if (promisc)
> +                       eth_set_promisc(edev, false);
>  
>                 return 0;
>         }
>  
> +       if (promisc) {
> +               ret = eth_set_promisc(edev, true);
> +               if (ret)
> +                       dev_warn(&edev->dev, "Failed to set promisc
> mode: %pe\n",
> +                                ERR_PTR(ret));
> +       }
> +
>         edev->tx_monitor = ethlog_tx_monitor;
>         edev->rx_monitor = ethlog_rx_monitor;
>  
> @@ -69,12 +81,13 @@ static int do_ethlog(int argc, char *argv[])
>  BAREBOX_CMD_HELP_START(ethlog)
>  BAREBOX_CMD_HELP_TEXT("Options:")
>  BAREBOX_CMD_HELP_OPT("-r", "remove log handler from Ethernet
> interface")
> +BAREBOX_CMD_HELP_OPT("-p", "Enable promisc mode, or disable if -r is
> used")
>  BAREBOX_CMD_HELP_END
>  
>  BAREBOX_CMD_START(ethlog)
>         .cmd            = do_ethlog,
>         BAREBOX_CMD_DESC("ETHLOG - tool to get dump of Ethernet
> packets")
> -       BAREBOX_CMD_OPTS("[-r] [device]")
> +       BAREBOX_CMD_OPTS("[-rp] [device]")
>         BAREBOX_CMD_GROUP(CMD_GRP_NET)
>         BAREBOX_CMD_COMPLETE(eth_complete)
>  BAREBOX_CMD_END

-- 
Pengutronix e.K.                | Johannes Zink                  |
Steuerwalder Str. 21            | https://www.pengutronix.de/    |
31137 Hildesheim, Germany       | Phone: +49-5121-206917-0       |
Amtsgericht Hildesheim, HRA 2686| Fax:   +49-5121-206917-5555    |