Re: [PATCH 1/4] block: add zone open, close and finish support

Matias Bjørling
2019-06-25T16:53:34Z

On Tue, Jun 25, 2019 at 6:51 PM Chaitanya Kulkarni
<Chaitanya.Kulkarni@wdc.com> wrote:
>
> On 06/25/2019 08:56 AM, Bart Van Assche wrote:
> > On 6/25/19 3:35 AM, Matias Bjørling wrote:
> >> On 6/25/19 12:27 AM, Chaitanya Kulkarni wrote:
> >>> On 6/24/19 12:43 PM, Bart Van Assche wrote:
> >>>> static inline bool op_is_write(unsigned int op)
> >>>> {
> >>>> return (op & 1);
> >>>> }
> >>>>
> >>>
> >>
> >> The zone mgmt commands are neither write nor reads commands. I guess,
> >> one could characterize them as write commands, but they don't write any
> >> data, they update a state of a zone on a drive. One should keep it as
> >> is? and make sure the zone mgmt commands don't get categorized as either
> >> read/write.
> >
> > Since the open, close and finish operations support modifying zone data
> > I propose to characterize these as write commands. How about the
> > following additional changes:
> > - Make bio_check_ro() refuse open/close/flush/reset zone operations for
> ^
> Since finish also listed above which supports modifying data do we need
> to add finish here with flush in above line ?
>
> > read-only partitions (see also commit a32e236eb93e ("Partially revert
> > "block: fail op_is_write() requests to read-only partitions"") # v4.18).
> > - In submit_bio(), change op_is_write(bio_op(bio)) ? "WRITE" : "READ"
> > into something that uses blk_op_str().
> Good idea, I've a patch for blk_op_str() and debugfs just waiting for
> this to merge. Does it make sense to add that patch in this series ?

Ship it off separately. Your patches can go in first.

> > - Add open/close/flush zone support be added in blk_partition_remap().
> same here for finish ?
> >
> > Thanks,
> >
> > Bart.
> >
>