Re: [PATCH v2 0/2] xen: error handling and FreeBSD compatibility fixes

["Roger Pau Monné" <roger.pau@citrix.com>]

On Fri, Jan 10, 2025 at 10:02:53AM +0000, David Woodhouse wrote:
> On Fri, 2025-01-10 at 10:35 +0100, Roger Pau Monne wrote:
> > Hello,
> > 
> > First patch from David introduces a new helper to fetch xenstore nodes,
> > while second patch removes the usage of scanf related functions with the
> > "%ms" format specifier, as it's not supported by the FreeBSD scanf libc
> > implementation.
> > 
> > Thanks, Roger.
> 
> Thanks. I've got a handful of non-bugfix cleanups to use the new
> xs_node_read in my tree at
> https://git.infradead.org/users/dwmw2/qemu.git/shortlog/refs/heads/xs_node_read
> 
> David Woodhouse (4):
>       hw/xen: Use xs_node_read() from xs_node_vscanf()
>       hw/xen: Use xs_node_read() from xen_console_get_name()
>       hw/xen: Use xs_node_read() from xen_netdev_get_name()
>       hw/xen: Use xs_node_read() from xenstore_read_str() instead of open-coding it

Acked-by: Roger Pau Monné <roger.pau@citrix.com>

> I'm slightly dubious about the last one; xen_pvdev.c didn't previously
> use anything from xen-bus-helper.c and even hardcodes zero for
> XBT_NULL. And I look at the way it deliberately reallocates the string,
> and wonder if we should be doing that in qemu_xen_xs_read() for the
> true Xen case. And does it even matter anywhere except Windows?

I would take the opportunity to use XBT_NULL instead of 0 on
xen_pvdev.c for the transaction.

Thanks, Roger.