Re: [f2fs-dev] [PATCH v3] f2fs: add F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE

[Eric Biggers]

On Thu, Dec 03, 2020 at 03:56:15PM +0900, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@xxxxxxxxxx>
> 
> Added two ioctl to decompress/compress explicitly the compression
> enabled file in "compress_mode=user" mount option.
> 
> Using these two ioctls, the users can make a control of compression
> and decompression of their files.
> 
> Signed-off-by: Daeho Jeong <daehojeong@xxxxxxxxxx>
> ---

I still don't understand the purpose of these new ioctls.  What's wrong with
just FS_IOC_SETFLAGS(FS_COMPRESS_FL) to compress a file, or FS_IOC_SETFLAGS(0)
to decompress a file?  That appears to already be supported...

- Eric