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[v2,3/3] btrfs: zoned: do not account freed region of read-only block group as zone_unusable

Message ID 1ce4bb0b205a2068770ca310f9217e761c0916c7.1614760899.git.naohiro.aota@wdc.com (mailing list archive)
State New, archived
Headers show
Series Fixes for zoned mode | expand

Commit Message

Naohiro Aota March 3, 2021, 8:55 a.m. UTC
We migrate zone unusable bytes to read-only bytes when a block group is set
to read-only, and account all the free region as bytes_readonly. Thus, we
should not increase block_group->zone_unusable when the block group is

Fixes: 169e0da91a21 ("btrfs: zoned: track unusable bytes for zones")
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
 fs/btrfs/free-space-cache.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 711a6a751ae9..81835153f747 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2555,7 +2555,12 @@  static int __btrfs_add_free_space_zoned(struct btrfs_block_group *block_group,
 	to_unusable = size - to_free;
 	ctl->free_space += to_free;
-	block_group->zone_unusable += to_unusable;
+	/*
+	 * If the block group is read-only, we should account freed
+	 * space into bytes_readonly.
+	 */
+	if (!block_group->ro)
+		block_group->zone_unusable += to_unusable;
 	if (!used) {