[PATCH 6/9] ovl: Fix ovl_getattr() to get number of blocks from lower

[Vivek Goyal <vgoyal@redhat.com>]

If an inode has been copied up metadata only, then we need to query the
number of blocks from lower and fill up the stat->st_blocks.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
 fs/overlayfs/inode.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index e5825b8948e0..d333fd48659f 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -140,6 +140,15 @@ int ovl_getattr(const struct path *path, struct kstat *stat,
 	if (!is_dir && ovl_test_flag(OVL_INDEX, d_inode(dentry)))
 		stat->nlink = dentry->d_inode->i_nlink;
 
+	if (ovl_test_flag(OVL_METACOPY, d_inode(dentry))) {
+		struct kstat lowerstat;
+
+		ovl_path_lower(dentry, &realpath);
+		err = vfs_getattr(&realpath, &lowerstat, STATX_BLOCKS, flags);
+		if (err)
+			goto out;
+		stat->blocks = lowerstat.blocks;
+	}
 out:
 	revert_creds(old_cred);
 
-- 
2.13.5