From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Sat, 24 May 2025 05:56:10 +0000 (-0400)
Subject: bcachefs: fix REFLINK_P_MAY_UPDATE_OPTIONS
X-Git-Tag: v6.16-rc1~48^2~68
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7098ba57c443868cab250a3a5db72c89ffbd9026;p=thirdparty%2Fkernel%2Flinux.git

bcachefs: fix REFLINK_P_MAY_UPDATE_OPTIONS

If we're doing a reflink copy of existing reflinked data, we may only
set REFLINK_P_MAY_UPDATE_OPTIONS if it was set on the reflink pointer
we're copying from.

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

diff --git a/fs/bcachefs/reflink.c b/fs/bcachefs/reflink.c
index 3a13dbcab6bab..41ca86cba2cd0 100644
--- a/fs/bcachefs/reflink.c
+++ b/fs/bcachefs/reflink.c
@@ -711,7 +711,8 @@ s64 bch2_remap_range(struct bch_fs *c,
 			SET_REFLINK_P_IDX(&dst_p->v, offset);
 
 			if (reflink_p_may_update_opts_field &&
-			    may_change_src_io_path_opts)
+			    may_change_src_io_path_opts &&
+			    REFLINK_P_MAY_UPDATE_OPTIONS(src_p.v))
 				SET_REFLINK_P_MAY_UPDATE_OPTIONS(&dst_p->v, true);
 		} else {
 			BUG();