erofs: release ztailpacking pclusters properly

Currently ztailpacking pclusters are chained with FOLLOWED_NOINPLACE and
not recorded into the managed_pslots XArray.

After commit 7674a42f35ea ("erofs: use struct lockref to replace
handcrafted approach"), ztailpacking pclusters won't be freed with
erofs_workgroup_put() anymore, which will cause the following issue:

BUG erofs_pcluster-1 (Tainted: G           OE     ): Objects remaining in erofs_pcluster-1 on __kmem_cache_shutdown()

Use z_erofs_free_pcluster() directly to free ztailpacking pclusters.

Fixes: 7674a42f35ea ("erofs: use struct lockref to replace handcrafted approach")
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20230822110530.96831-1-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index da52b1c..036f610 100644 (file)
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -1369,7 +1369,10 @@ static void z_erofs_decompress_queue(const struct z_erofs_decompressqueue *io,
                owned = READ_ONCE(be.pcl->next);
 
                z_erofs_decompress_pcluster(&be, io->eio ? -EIO : 0);
-               erofs_workgroup_put(&be.pcl->obj);
+               if (z_erofs_is_inline_pcluster(be.pcl))
+                       z_erofs_free_pcluster(be.pcl);
+               else
+                       erofs_workgroup_put(&be.pcl->obj);
        }
 }