linux-kernel - Re: [PATCH v8 2/2] wifi: mwifiex: add host mlme for AP mode

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Date: Tue, 27 Feb 2024 18:53:26 +0100
From: Francesco Dolcini <francesco@...cini.it>
To: David Lin <yu-hao.lin@....com>
Cc: linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	briannorris@...omium.org, kvalo@...nel.org, francesco@...cini.it,
	tsung-hsien.hsieh@....com
Subject: Re: [PATCH v8 2/2] wifi: mwifiex: add host mlme for AP mode

On Fri, Dec 22, 2023 at 11:21:23AM +0800, David Lin wrote:
> Add host based MLME to enable WPA3 functionalities in AP mode.
> This feature required a firmware with the corresponding V2 Key API
> support. The feature (WPA3) is currently enabled and verified only
> on IW416. Also, verified no regression with change when host MLME
> is disabled.
> 
> Signed-off-by: David Lin <yu-hao.lin@....com>

Reviewed-by: Francesco Dolcini <francesco.dolcini@...adex.com>

with the same disclaimer from patch 1/2, I'm not a wireless driver expert.

> ---
> 
> v8:
>    - first full and complete patch to support host based MLME for AP
>      mode.
> 
> ---
>  .../net/wireless/marvell/mwifiex/cfg80211.c   |  79 +++++++-
>  drivers/net/wireless/marvell/mwifiex/cmdevt.c |   2 +
>  drivers/net/wireless/marvell/mwifiex/fw.h     |  21 +++
>  drivers/net/wireless/marvell/mwifiex/ioctl.h  |   5 +
>  .../wireless/marvell/mwifiex/sta_cmdresp.c    |   2 +
>  .../net/wireless/marvell/mwifiex/uap_cmd.c    | 171 ++++++++++++++++++
>  drivers/net/wireless/marvell/mwifiex/util.c   |  24 +++
>  7 files changed, 301 insertions(+), 3 deletions(-)
> 

..

> diff --git a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
> index e78a201cd150..1e7f4afe9960 100644
> --- a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
> +++ b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
> @@ -760,6 +786,144 @@ static int mwifiex_cmd_uap_sta_deauth(struct mwifiex_private *priv,
>  	return 0;
>  }
>  
> +/* This function prepares AP specific add station command.
> + */
> +static int mwifiex_cmd_uap_add_station(struct mwifiex_private *priv,
> +				       struct host_cmd_ds_command *cmd,
> +				       u16 cmd_action, void *data_buf)
> +{
> +	struct host_cmd_ds_add_station *new_sta = &cmd->params.sta_info;
> +	struct mwifiex_sta_info *add_sta = (struct mwifiex_sta_info *)data_buf;
> +	struct station_parameters *params = add_sta->params;
> +	struct mwifiex_sta_node *sta_ptr;
> +	u8 *pos;
> +	u8 qos_capa;
> +	u16 header_len = sizeof(struct mwifiex_ie_types_header);
> +	u16 tlv_len;
> +	int size;
> +	struct mwifiex_ie_types_data *tlv;
> +	struct mwifiex_ie_types_sta_flag *sta_flag;
> +	int i;
> +
> +	cmd->command = cpu_to_le16(HostCmd_CMD_ADD_NEW_STATION);
> +	new_sta->action = cpu_to_le16(cmd_action);
> +	size = sizeof(struct host_cmd_ds_add_station) + S_DS_GEN;
> +
> +	if (cmd_action == HostCmd_ACT_ADD_STA)
> +		sta_ptr = mwifiex_add_sta_entry(priv, add_sta->peer_mac);
> +	else
> +		sta_ptr = mwifiex_get_sta_entry(priv, add_sta->peer_mac);
> +
> +	if (!sta_ptr)
> +		return -1;
> +
> +	memcpy(new_sta->peer_mac, add_sta->peer_mac, ETH_ALEN);
> +
> +	if (cmd_action == HostCmd_ACT_REMOVE_STA)
> +		goto done;

This goto here, skipping lot of code, just to do

  cmd->size = cpu_to_le16(size);
  return 0;

is not really nice for my personal taste, but fine like that.

Francesco