On Sun, May 25, 2014 at 6:18 AM, Hani Benhabiles <[email protected]> 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. Thanks, Paul >> > On Fri, May 16, 2014 at 7:43 PM, Hani Benhabiles <[email protected]> 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 <[email protected]> >> > > --- >> > > 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 >> > > >> > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
