From badae9c86979c459bd7d895d6d7ddc7a01131ff7 Mon Sep 17 00:00:00 2001
From: Naohiro Aota <naohiro.aota@wdc.com>
Date: Wed, 3 Mar 2021 17:55:48 +0900
Subject: [PATCH] btrfs: zoned: do not account freed region of read-only block
group as zone_unusable
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 read-only.
Fixes: 169e0da91a21 ("btrfs: zoned: track unusable bytes for zones")
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/free-space-cache.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 711a6a751ae99..9988decd5717b 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;
spin_unlock(&ctl->tree_lock);
if (!used) {
spin_lock(&block_group->lock);
--
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