From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Mon, 24 Mar 2025 20:25:53 +0000 (-0400)
Subject: bcachefs: Don't unnecessarily decrypt data when moving
X-Git-Tag: block-6.15-20250403~4^2~28
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=19ff84b20d62e62ff527a384b35102bf745a70d1;p=linux-block.git

bcachefs: Don't unnecessarily decrypt data when moving

There's various checks for "are we going to compress this" - but we're
not going to compress if we know it's incompressible.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/io_write.c b/fs/bcachefs/io_write.c
index 9613361a519b..07b55839768e 100644
--- a/fs/bcachefs/io_write.c
+++ b/fs/bcachefs/io_write.c
@@ -940,6 +940,9 @@ static int bch2_write_extent(struct bch_write_op *op, struct write_point *wp,
 	bool page_alloc_failed = false;
 	int ret, more = 0;
 
+	if (op->incompressible)
+		op->compression_opt = 0;
+
 	BUG_ON(!bio_sectors(src));
 
 	ec_buf = bch2_writepoint_ec_buf(c, wp);