btrfs: zoned: requeue to unused block group list if zone finish failed

commit 62be7afcc13b2727bdc6a4c91aefed6b452e6ecc upstream.

btrfs_zone_finish() can fail for several reason. If it is -EAGAIN, we need
to try it again later. So, put the block group to the retry list properly.

Failing to do so will keep the removable block group intact until remount
and can causes unnecessary ENOSPC.

Fixes: 74e91b12b115 ("btrfs: zoned: zone finish unused block group")
CC: stable@vger.kernel.org # 6.1+
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 5b0cb04b2b93f2c2a76206aa930145eb397f3cf8..8b67dba3b7df32f00d00f822df491845f57fa82f 100644 (file)
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1616,8 +1616,10 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
                ret = btrfs_zone_finish(block_group);
                if (ret < 0) {
                        btrfs_dec_block_group_ro(block_group);
-                       if (ret == -EAGAIN)
+                       if (ret == -EAGAIN) {
+                               btrfs_link_bg_list(block_group, &retry_list);
                                ret = 0;
+                       }
                        goto next;
                }