Re: [PATCH] bugfix: virNetDevBridgeSetSTPDelay on BSD

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

On Sat, Jun 22, 2013 at 06:01:17PM +0400, Roman Bogorodskiy wrote:
> virNetDevBridgeSetSTPDelay accepts delay in milliseconds,
> but BSD implementation was expecting seconds. Therefore,
> it was working correctly only with delay == 0.
> ---
>  src/util/virnetdevbridge.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/src/util/virnetdevbridge.c b/src/util/virnetdevbridge.c
> index ffcb4a4..9d95374 100644
> --- a/src/util/virnetdevbridge.c
> +++ b/src/util/virnetdevbridge.c
> @@ -593,10 +593,11 @@ int virNetDevBridgeSetSTPDelay(const char *brname,
>                                 int delay)
>  {
>      struct ifbrparam param;
> +    u_long delay_seconds = delay / 1000;
>  
>      /* FreeBSD doesn't allow setting STP delay < 4 */
> -    delay = delay < 4 ? 4 : delay;
> -    param.ifbrp_fwddelay = ((u_long)delay) & 0xff;
> +    delay_seconds = delay_seconds < 4 ? 4 : delay_seconds;
> +    param.ifbrp_fwddelay = delay_seconds & 0xff;
>  
>      if (virNetDevBridgeCmd(brname, BRDGSFD, &param, sizeof(param)) < 0) {
>          virReportSystemError(errno,

ACK.


Does FreeBSD really not allow setting a delay less than 4 seconds ?
That would make PXE boot fairly unreliable, because QEMU will start
and iPXE will run significantly before that 4 second network delay
has expired causing the PXE packets to be lost.


Daniel
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