linux-kernel - Re: [PATCH v4 1/4] block: Introduce provisioning primitives

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Message-ID: <CAG9=OMOfpJHB3HbjK46_bh_P6b4vdSfBt1Q39ukuKhZzyscnow@mail.gmail.com>
Date:   Thu, 20 Apr 2023 10:41:57 -0700
From:   Sarthak Kukreti <sarthakkukreti@...omium.org>
To:     Bart Van Assche <bvanassche@....org>
Cc:     dm-devel@...hat.com, linux-block@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...nel.org>,
        Christoph Hellwig <hch@...radead.org>,
        Brian Foster <bfoster@...hat.com>,
        "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Bart Van Assche <bvanassche@...gle.com>,
        Daniil Lunev <dlunev@...gle.com>,
        "Darrick J. Wong" <djwong@...nel.org>
Subject: Re: [PATCH v4 1/4] block: Introduce provisioning primitives

Dropped in v5.

Thanks!
Sarthak

On Tue, Apr 18, 2023 at 3:43 PM Bart Van Assche <bvanassche@....org> wrote:
>
> On 4/18/23 15:12, Sarthak Kukreti wrote:
> >       /* Fail if we don't recognize the flags. */
> > -     if (mode & ~BLKDEV_FALLOC_FL_SUPPORTED)
> > +     if (mode != 0 && mode & ~BLKDEV_FALLOC_FL_SUPPORTED)
> >               return -EOPNOTSUPP;
>
> Is this change necessary? Doesn't (mode & ~BLKDEV_FALLOC_FL_SUPPORTED)
> != 0 imply that mode != 0?
>
> Thanks,
>
> Bart.
>