On Thu, Nov 8, 2012 at 4:31 PM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
> From: Johannes Berg <johannes.berg@xxxxxxxxx>
>
> Add a debugfs file showing which HW queues were
> allocated to a virtual interface, including the
> CAB queue for AP interfaces.
>
> Change-Id: I486924e961b6ad6785a79db09620919ee644e703
> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
> ---
> net/mac80211/debugfs_netdev.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
> index 3393ad5..c3f089a 100644
> --- a/net/mac80211/debugfs_netdev.c
> +++ b/net/mac80211/debugfs_netdev.c
> @@ -169,6 +169,26 @@ IEEE80211_IF_FILE(flags, flags, HEX);
> IEEE80211_IF_FILE(state, state, LHEX);
> IEEE80211_IF_FILE(channel_type, vif.bss_conf.channel_type, DEC);
>
> +static ssize_t
> +ieee80211_if_fmt_hw_queues(const struct ieee80211_sub_if_data *sdata,
> + char *buf, int buflen)
> +{
> + int len;
> +
> + len = scnprintf(buf, buflen, "AC queues: VO:%d VI:%d BE:%d BK:%d\n",
> + sdata->vif.hw_queue[IEEE80211_AC_VO],
> + sdata->vif.hw_queue[IEEE80211_AC_VI],
> + sdata->vif.hw_queue[IEEE80211_AC_BE],
> + sdata->vif.hw_queue[IEEE80211_AC_BK]);
> +
> + if (sdata->vif.type == NL80211_IFTYPE_AP && len < buflen)
> + len += scnprintf(buf + len, buflen - len, "cab queue: %d\n",
> + sdata->vif.cab_queue);
> +
the (len < buflen) condition is redundant (scnprintf returns the
number of chars written not including the trailing NULL, so it will
always be < buflen)
Eliad.
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