Ceph » CephFS

We saw this from testing Manila. The symptom is that the Manila driver gets ENOTEMPTY when trying to remove a share. Upon investigation, we saw that the readdirs in CephFSVolumeClient were getting only [".", ".."] for directories that really contained files, so the recursive removal of files wasn't happening.

Initially I thought this would be some quirk associated with the way the cephfsvolumeclient 'delete' phase moves a dir immediately before the 'purge' phase does the recursive deletion, but it turns out this issue is apparent even without moving the dir.

    def test_purge_bug(self):
        for m in self.mounts:
            m.umount_wait()

        # Create a dir on mount A
        self.mount_a.mount()
        self.mount_a.run_shell(["mkdir", "parent1"])
        self.mount_a.run_shell(["mkdir", "parent2"])
        self.mount_a.run_shell(["mkdir", "parent1/mydir"])

        # Put some files in it from mount B
        self.mount_b.mount()
        self.mount_b.run_shell(["touch", "parent1/mydir/afile"])

      <---- if we ls from mount A here, we see afile

        self.mount_b.umount_wait()

      <---- if we ls from mount B here, we do not see afile

        # List the dir's contents on mount A    <----- this assertion fails
        self.assertListEqual(self.mount_a.ls("parent1/mydir"),
                             ["afile"])