From: Daniel Hill <daniel@gluo.nz>
Date: Sat, 15 Oct 2022 13:25:54 +0000 (+1300)
Subject: bcachefs: __bio_compress() fix up.
X-Git-Tag: io_uring-6.7-2023-11-10~119^2~706
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=be75bb7a0e0565c0c409842048567e8d07f28675;p=linux-block.git

bcachefs: __bio_compress() fix up.

A single block can't be compressed, so it's incompressible.
This stops rebalance repeatably marking extents as uncompressed.

Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/compress.c b/fs/bcachefs/compress.c
index f692f35a6a98..2b7080b67eca 100644
--- a/fs/bcachefs/compress.c
+++ b/fs/bcachefs/compress.c
@@ -377,7 +377,7 @@ static unsigned __bio_compress(struct bch_fs *c,
 
 	/* If it's only one block, don't bother trying to compress: */
 	if (src->bi_iter.bi_size <= c->opts.block_size)
-		return 0;
+		return BCH_COMPRESSION_TYPE_incompressible;
 
 	dst_data = bio_map_or_bounce(c, dst, WRITE);
 	src_data = bio_map_or_bounce(c, src, READ);