Re: [Qemu-devel] [PATCH] file-posix: Consolidate the locking error message

[Fam Zheng <famz@redhat.com>]

On Fri, 06/01 07:32, Eric Blake wrote:
> On 06/01/2018 04:18 AM, Fam Zheng wrote:
> > When hot-plugging a block device fails due to image locking errors,
> > users won't see the helpful 'Is another process using the image?'
> > message in QMP because currently the error hint is not carried over
> > there.
> > 
> > Even though extending QMP to include hint is a conceivably easy task,
> > Libvirt will need some change to consume that data.
> > 
> > Before that is fully sorted out, let's just do the easy fix by joining
> > the two lines.
> > 
> > Signed-off-by: Fam Zheng <famz@redhat.com>
> > ---
> >   block/file-posix.c         | 10 ++--
> >   tests/qemu-iotests/153.out | 99 +++++++++++++-------------------------
> >   tests/qemu-iotests/182.out |  3 +-
> >   3 files changed, 38 insertions(+), 74 deletions(-)
> > 
> > diff --git a/block/file-posix.c b/block/file-posix.c
> > index 5a602cfe37..03776e13b1 100644
> > --- a/block/file-posix.c
> > +++ b/block/file-posix.c
> > @@ -699,11 +699,10 @@ static int raw_check_lock_bytes(BDRVRawState *s,
> >               if (ret) {
> >                   char *perm_name = bdrv_perm_names(p);
> >                   error_setg(errp,
> > -                           "Failed to get \"%s\" lock",
> > +                           "Failed to get \"%s\" lock. "
> > +                           "Is another process using the image?",
> 
> Except that this goes against the error message recommendations that Markus
> has tried to remind people of (in general, using a full-stop in error_setg()
> is frowned on).  Markus, do you have any suggestions?

OK, now I remember what Markus suggested was a paranthesis around the second
sentence instead of following a full-stop. So it will look like:

"Failed to get shared \"%s\" lock (is another process using the image?)"

Is that an acceptable form?

Fam