Can read and write on the same connection at the same time？

[程茂 <chengmao2010@xxxxxxxxx>]

kclient will establish only one connection with each osd，but there is
a mutex in the ceph_connection.

partial code about con_work

static void con_work(struct work_struct *work)
{
struct ceph_connection *con = container_of(work, struct ceph_connection,
  work.work);
mutex_lock(&con->mutex);
……
      if (test_and_clear_bit(SOCK_CLOSED, &con->state) ||
   try_read(con) < 0 ||
   try_write(con) < 0) {
mutex_unlock(&con->mutex);
bsdocfs_fault(con);     /* error/fault path */
goto done_unlocked;
}
……
}

if kclient read data from osdN，can kclient write data to osdN at the same time？
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