orangefs: report attributes_mask and attributes for statx

OrangeFS formerly failed to set attributes_mask with the result that
software could not see immutable and append flags present in the
filesystem.

Reported-by: Becky Ligon <ligon@clemson.edu>
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Fixes: 68a24a6cc4a6 ("orangefs: implement statx")
Cc: stable@vger.kernel.org
Cc: hubcap@omnibond.com
Signed-off-by: Mike Marshall <hubcap@omnibond.com>

fs/orangefs/inode.c

@@ -268,6 +268,13 @@ int orangefs_getattr(const struct path *path, struct kstat *stat,
 		else
 			stat->result_mask = STATX_BASIC_STATS &
 			    ~STATX_SIZE;
+
+		stat->attributes_mask = STATX_ATTR_IMMUTABLE |
+		    STATX_ATTR_APPEND;
+		if (inode->i_flags & S_IMMUTABLE)
+			stat->attributes |= STATX_ATTR_IMMUTABLE;
+		if (inode->i_flags & S_APPEND)
+			stat->attributes |= STATX_ATTR_APPEND;
 	}
 	return ret;
 }