linux-kernel - Re: [PATCH v4 09/10] loop: Clean up LOOP_SET_STATUS lo

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Message-ID: <20200506060822.GF10771@lst.de>
Date:   Wed, 6 May 2020 08:08:22 +0200
From:   Christoph Hellwig <hch@....de>
To:     Martijn Coenen <maco@...roid.com>
Cc:     axboe@...nel.dk, hch@....de, ming.lei@...hat.com,
        narayan@...gle.com, zezeozue@...gle.com, kernel-team@...roid.com,
        maco@...gle.com, bvanassche@....org, Chaitanya.Kulkarni@....com,
        jaegeuk@...nel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 09/10] loop: Clean up LOOP_SET_STATUS lo_flags
 handling.

On Wed, Apr 29, 2020 at 04:03:40PM +0200, Martijn Coenen wrote:
> LOOP_SET_STATUS(64) will actually allow some lo_flags to be modified; in
> particular, LO_FLAGS_AUTOCLEAR can be set and cleared, whereas
> LO_FLAGS_PARTSCAN can be set to request a partition scan. Make this
> explicit by updating the UAPI to include the flags that can be
> set/cleared using this ioctl.
> 
> The implementation can then blindly take over the passed in flags,
> and use the previous flags for those flags that can't be set / cleared
> using LOOP_SET_STATUS.

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>