NFSv4.1: allow nfs_fhget to succeed with mounted on fileid

[~andy/linux] / fs / nfs / internal.h

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index b9056cbe68d6c0f8f6c9db7b22c5563d5fc1f7d7..2a55347a2daa85f66aa24b44d7bb7c93efe1d409 100644 (file)
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -45,6 +45,17 @@ static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct
                fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
 }
 
+static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
+{
+       if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
+           (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
+            ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
+               return 0;
+
+       fattr->fileid = fattr->mounted_on_fileid;
+       return 1;
+}
+
 struct nfs_clone_mount {
        const struct super_block *sb;
        const struct dentry *dentry;