• Nicholas Bellinger's avatar
    target: Convert ACL change queue_depth se_session reference usage · d36ad77f
    Nicholas Bellinger authored
    This patch converts core_tpg_set_initiator_node_queue_depth()
    to use struct se_node_acl->acl_sess_list when performing
    explicit se_tpg_tfo->shutdown_session() for active sessions,
    in order for new se_node_acl->queue_depth to take effect.
    
    This follows how core_tpg_del_initiator_node_acl() currently
    works when invoking se_tpg_tfo->shutdown-session(), and ahead
    of the next patch to take se_node_acl->acl_kref during lookup,
    the extra get_initiator_node_acl() can go away. In order to
    achieve this, go ahead and change target_get_session() to use
    kref_get_unless_zero() and propigate up the return value
    to know when a session is already being released.
    
    This is because se_node_acl->acl_group is already protecting
    se_node_acl->acl_group reference via configfs, and shutdown
    within core_tpg_del_initiator_node_acl() won't occur until
    sys_write() to core_tpg_set_initiator_node_queue_depth()
    attribute returns back to user-space.
    
    Also, drop the left-over iscsi-target hack, and obtain
    se_portal_group->session_lock in lio_tpg_shutdown_session()
    internally. Remove iscsi-target wrapper and unused se_tpg +
    force parameters and associated code.
    Reported-by: default avatarChristoph Hellwig <hch@lst.de>
    Cc: Sagi Grimberg <sagig@mellanox.com>
    Cc: Hannes Reinecke <hare@suse.de>
    Cc: Andy Grover <agrover@redhat.com>
    Cc: Mike Christie <michaelc@cs.wisc.edu>
    Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
    d36ad77f
iscsi_target_tpg.c 22.4 KB