# Re: \[PATCH v7 00/10\] fs: interface for directly reading/writing compressed data

- From: Josef Bacik \<josef@toxicpanda.com\>
- Date: 2021-01-29 16:35:26 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2021/01/198915
- Thread: https://ratatoskr.run/linux-fsdevel/2021/01/198194/t.md

```text
On 1/22/21 3:46 PM, Omar Sandoval wrote:
> From: Omar Sandoval <redacted>
>
> 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 v5.11-rc4.
>

Is everybody OK with this?  Al?  I would like to go ahead and get this merged for the next merge window as long as everybody is OK with it, as it's blocking a fair bit of BTRFS work.  Thanks,

Josef
```