Re: [PATCH v2 4/4] fsx: move range generation logic into a common helper

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On Fri, Apr 17, 2020 at 6:10 PM Brian Foster <bfoster@xxxxxxxxxx> wrote:
>
> On Wed, Apr 08, 2020 at 07:12:08PM +0100, fdmanana@xxxxxxxxxx wrote:
> > From: Filipe Manana <fdmanana@xxxxxxxx>
> >
> > We have very similar code that generates the destination range for clone,
> > dedupe and copy_file_range operations, so avoid duplicating the code three
> > times and move it into a helper function.
> >
> > Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
> > ---
> >
> > V2: Turned the first parameter of the helper into a boolean as Darrick suggested.
> >
> >  ltp/fsx.c | 91 +++++++++++++++++++++++++--------------------------------------
> >  1 file changed, 36 insertions(+), 55 deletions(-)
> >
> > diff --git a/ltp/fsx.c b/ltp/fsx.c
> > index 89a5f60e..9bfc98e0 100644
> > --- a/ltp/fsx.c
> > +++ b/ltp/fsx.c
> ...
> > @@ -2004,63 +2034,14 @@ test(void)
> >                       keep_size = random() % 2;
> >               break;
> ...
> >       case OP_COPY_RANGE:
> > -             {
> > -                     int tries = 0;
> > -
> > -                     TRIM_OFF_LEN(offset, size, file_size);
> > -                     offset -= offset % readbdy;
> > -                     if (o_direct)
> > -                             size -= size % readbdy;
> > -                     do {
> > -                             if (tries++ >= 30) {
> > -                                     size = 0;
> > -                                     break;
> > -                             }
> > -                             offset2 = random();
> > -                             TRIM_OFF(offset2, maxfilelen);
> > -                             offset2 -= offset2 % writebdy;
>
> It looks like this writebdy bit is lost in the new helper...

Yes, thanks for pointing out. I'll send a v3.

>
> Brian
>
> > -                     } while (range_overlaps(offset, offset2, size) ||
> > -                              offset2 + size > maxfilelen);
> > -                     break;
> > -             }
> > +             generate_dest_range(true, maxfilelen, &offset, &size, &offset2);
> > +             break;
> >       }
> >
> >  have_op:
> > --
> > 2.11.0
> >
>



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