On Sun, May 25, 2014 at 02:11:13PM -0400, Paul Clements wrote:
> On Sun, May 25, 2014 at 6:18 AM, Hani Benhabiles <kroo...@gmail.com> wrote:
> > On Sun, May 18, 2014 at 10:11:13AM +0100, Hani Benhabiles wrote:
> >> On Fri, May 16, 2014 at 10:56:33PM -0400, Paul Clements wrote:
> >> > Agreed. But better yet, the request structure should just be zeroed when
> >> > it's allocated.
> >> >
> >>
> >> It is already initialized in __nbd_ioctl() with the blk_rq_init() call
> >> which
> >> sets the __sector value to -1 (which is 0xfffffffffffffe00 after the left
> >> shifts.)
> >>
> >> This is the only (non-ugly / non-intrusive) way to do it afaict.
> >>
> >
> > Ping!
> >
> > Anything blocking this patch ?
>
> It's cleaner to just zero the struct and get rid of the conditional
> zeroing of specific fields. I'll prepare a patch in the next few days.
>
Sorry, I misunderstood which struct you were talking about!
Will send a v2 shortly.
> Thanks,
> Paul
>
> >> > On Fri, May 16, 2014 at 7:43 PM, Hani Benhabiles <kroo...@gmail.com>
> >> > wrote:
> >> >
> >> > > Len field is already set to zero, but not the from field which is sent
> >> > > as
> >> > > 0xfffffffffffffe00. This makes no sense, and may cause confuse server
> >> > > implementations doing sanity checks (qemu-nbd is an example.)
> >> > >
> >> > > Signed-off-by: Hani Benhabiles <h...@linux.com>
> >> > > ---
> >> > > drivers/block/nbd.c | 2 +-
> >> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> >> > >
> >> > > diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
> >> > > index 3a70ea2..657bdac 100644
> >> > > --- a/drivers/block/nbd.c
> >> > > +++ b/drivers/block/nbd.c
> >> > > @@ -246,7 +246,7 @@ static int nbd_send_req(struct nbd_device *nbd,
> >> > > struct
> >> > > request *req)
> >> > > request.magic = htonl(NBD_REQUEST_MAGIC);
> >> > > request.type = htonl(nbd_cmd(req));
> >> > >
> >> > > - if (nbd_cmd(req) == NBD_CMD_FLUSH) {
> >> > > + if (nbd_cmd(req) == NBD_CMD_FLUSH || nbd_cmd(req) ==
> >> > > NBD_CMD_DISC)
> >> > > {
> >> > > /* Other values are reserved for FLUSH requests. */
> >> > > request.from = 0;
> >> > > request.len = 0;
> >> > > --
> >> > > 1.8.3.2
> >> > >
> >> > >
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