erofs: fix misbehavior of unsupported chunk format check

Unsupported chunk format should be checked with
"if (vi->chunkformat & ~EROFS_CHUNK_FORMAT_ALL)"

Found when checking with 4k-byte blockmap (although currently mkfs
uses inode chunk indexes format by default.)

Link: https://lore.kernel.org/r/20210922095141.233938-1-hsiangkao@linux.alibaba.com
Fixes: c5aa903a59db ("erofs: support reading chunk-based uncompressed files")
Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
index 31ac3a7..a552399 100644 (file)
--- a/fs/erofs/inode.c
+++ b/fs/erofs/inode.c
@@ -176,7 +176,7 @@ static struct page *erofs_read_inode(struct inode *inode,
        }
 
        if (vi->datalayout == EROFS_INODE_CHUNK_BASED) {
-               if (!(vi->chunkformat & EROFS_CHUNK_FORMAT_ALL)) {
+               if (vi->chunkformat & ~EROFS_CHUNK_FORMAT_ALL) {
                        erofs_err(inode->i_sb,
                                  "unsupported chunk format %x of nid %llu",
                                  vi->chunkformat, vi->nid);