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Subject: Re: [PATCH v4 06/11] block: Add atomic write support for statx
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To: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>, axboe@kernel.dk,
kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, jejb@linux.ibm.com,
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Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
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nilay@linux.ibm.com,
Prasad Singamsetty <prasad.singamsetty@oracle.com>
References: <87frxg1v8p.fsf@doe.com>
From: John Garry <john.g.garry@oracle.com>
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On 25/02/2024 14:20, Ritesh Harjani (IBM) wrote:
> John Garry <john.g.garry@oracle.com> writes:
>
>> From: Prasad Singamsetty <prasad.singamsetty@oracle.com>
>>
>> Extend statx system call to return additional info for atomic write support
>> support if the specified file is a block device.
>>
>> Signed-off-by: Prasad Singamsetty <prasad.singamsetty@oracle.com>
>> Signed-off-by: John Garry <john.g.garry@oracle.com>
>> ---
>> block/bdev.c | 37 +++++++++++++++++++++++++++----------
>> fs/stat.c | 13 ++++++-------
>> include/linux/blkdev.h | 5 +++--
>> 3 files changed, 36 insertions(+), 19 deletions(-)
>>
>> diff --git a/block/bdev.c b/block/bdev.c
>> index e9f1b12bd75c..0dada9902bd4 100644
>> --- a/block/bdev.c
>> +++ b/block/bdev.c
>> @@ -1116,24 +1116,41 @@ void sync_bdevs(bool wait)
>> iput(old_inode);
>> }
>>
>> +#define BDEV_STATX_SUPPORTED_MASK (STATX_DIOALIGN | STATX_WRITE_ATOMIC)
>> +
>> /*
>> - * Handle STATX_DIOALIGN for block devices.
>> - *
>> - * Note that the inode passed to this is the inode of a block device node file,
>> - * not the block device's internal inode. Therefore it is *not* valid to use
>> - * I_BDEV() here; the block device has to be looked up by i_rdev instead.
>> + * Handle STATX_{DIOALIGN, WRITE_ATOMIC} for block devices.
>> */
>> -void bdev_statx_dioalign(struct inode *inode, struct kstat *stat)
>> +void bdev_statx(struct dentry *dentry, struct kstat *stat, u32 request_mask)
>
> why change this to dentry? Why not keep it as inode itself?
I suppose that I could do that.
Thanks,
John