Hi,
Thank you for your comment.
>>>1. Add new ioctl(EXT4_IOC_DEFRAG) which returns the first physical
>>> block number of the specified file. With this ioctl, a command
>>> gets the specified directory's.
>>
>>Maybe I don't understand, but how is this different from the long-time
>>FIBMAP ioctl?
>
>I can use FIBMAP instead of my new ioctl.
>You are right. I should have used FIBMAP ioctl...
I have to get the physical block number of the specified directory.
But FIBMAP is available only for a regular file, not for a directory.
So I will use my new ioctl.
Though it might make sense to implement FIBMAP for a directory, to keep
it consistent and allow user-space tools like "filefrag" to work on
directories also.
It sounds good.
I think it will be useful for other tools which use FIBMAP.
So I will consider the implementation of FIBMAP for a directory.
Cheers, Takashi
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