[PATCH v4 06/11] block: Add atomic write support for statx

[John Garry]

On 25/02/2024 14:20, Ritesh Harjani (IBM) wrote:
> John Garry <john.g.garry at oracle.com> writes:
> 
>> From: Prasad Singamsetty <prasad.singamsetty at 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 at oracle.com>
>> Signed-off-by: John Garry <john.g.garry at 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