Re: [PATCH v8 00/10] fs: interface for directly reading/writing compressed data

[Josef Bacik <josef@toxicpanda.com>]

On 3/16/21 3:42 PM, Omar Sandoval wrote:
> From: Omar Sandoval <osandov@fb.com>
> 
> This series adds an API for reading compressed data on a filesystem
> without decompressing it as well as support for writing compressed data
> directly to the filesystem. As with the previous submissions, I've
> included a man page patch describing the API. I have test cases
> (including fsstress support) and example programs which I'll send up
> [1].
> 
> The main use-case is Btrfs send/receive: currently, when sending data
> from one compressed filesystem to another, the sending side decompresses
> the data and the receiving side recompresses it before writing it out.
> This is wasteful and can be avoided if we can just send and write
> compressed extents. The patches implementing the send/receive support
> will be sent shortly.
> 
> Patches 1-3 add the VFS support and UAPI. Patch 4 is a fix that this
> series depends on; it can be merged independently. Patches 5-8 are Btrfs
> prep patches. Patch 9 adds Btrfs encoded read support and patch 10 adds
> Btrfs encoded write support.
> 
> These patches are based on Dave Sterba's Btrfs misc-next branch [2],
> which is in turn currently based on v5.12-rc3.
> 

Al,

Can we get some movement on this?  Omar is sort of spinning his wheels here 
trying to get this stuff merged, no major changes have been done in a few 
postings.  Thanks,

Josef