diff options
Diffstat (limited to 'fs/overlayfs/super.c')
| -rw-r--r-- | fs/overlayfs/super.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 6b0111ae2ceb..ef64984c9bbc 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1029,6 +1029,21 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) sb->s_flags |= MS_RDONLY; ufs->workdir = NULL; } + + /* + * Upper should support d_type, else whiteouts are visible. + * Given workdir and upper are on same fs, we can do + * iterate_dir() on workdir. + */ + err = ovl_check_d_type_supported(&workpath); + if (err < 0) + goto out_put_workdir; + + if (!err) { + pr_err("overlayfs: upper fs needs to support d_type.\n"); + err = -EINVAL; + goto out_put_workdir; + } } err = -ENOMEM; |