5  * This file contains SPC-3 compliant persistent reservations and
136 		 * persistent reservation shall not be changed, if the command  in target_check_scsi2_reservation_conflict()
140 		 * status, but the persistent reservation shall not be released,  in target_check_scsi2_reservation_conflict()
143 		 * a) An I_T nexus that is a persistent reservation holder; or  in target_check_scsi2_reservation_conflict()
145 		 *    all registrants type persistent reservation is present.  in target_check_scsi2_reservation_conflict()
168 		 * If a logical unit has executed a PERSISTENT RESERVE OUT  in target_check_scsi2_reservation_conflict()
306  * Begin SPC-3/SPC-4 Persistent Reservations emulation support
343 		 * Some commands are only allowed for the persistent reservation  in core_scsi3_pr_seq_non_holder()
1240 		 * e) If the I_T nexus is the persistent reservation holder  in core_scsi3_check_implicit_release()
1241 		 *    and the persistent reservation is not an all registrants  in core_scsi3_check_implicit_release()
1242 		 *    type, then a PERSISTENT RESERVE OUT command with REGISTER  in core_scsi3_check_implicit_release()
1535 	 * For a PERSISTENT RESERVE OUT specify initiator ports payload,  in core_scsi3_decode_spec_i_port()
2204 		 * If the persistent reservation is a registrants only  in core_scsi3_emulate_pro_register()
2208 		 * nexus on which the PERSISTENT RESERVE OUT command was  in core_scsi3_emulate_pro_register()
2288 	 * An application client creates a persistent reservation by issuing  in core_scsi3_pro_reserve()
2289 	 * a PERSISTENT RESERVE OUT command with RESERVE service action through  in core_scsi3_pro_reserve()
2305 	 *  b) TYPE field and SCOPE field set to the persistent reservation  in core_scsi3_pro_reserve()
2308 	 * Only one persistent reservation is allowed at a time per logical unit  in core_scsi3_pro_reserve()
2309 	 * and that persistent reservation has a scope of LU_SCOPE.  in core_scsi3_pro_reserve()
2327 		 * If the device server receives a PERSISTENT RESERVE OUT  in core_scsi3_pro_reserve()
2328 		 * command from an I_T nexus other than a persistent reservation  in core_scsi3_pro_reserve()
2329 		 * holder (see 5.7.10) that attempts to create a persistent  in core_scsi3_pro_reserve()
2330 		 * reservation when a persistent reservation already exists for  in core_scsi3_pro_reserve()
2351 		 * If a persistent reservation holder attempts to modify the  in core_scsi3_pro_reserve()
2352 		 * type or scope of an existing persistent reservation, the  in core_scsi3_pro_reserve()
2374 		 * If the device server receives a PERSISTENT RESERVE OUT  in core_scsi3_pro_reserve()
2377 		 * and scope from a persistent reservation holder, it shall not  in core_scsi3_pro_reserve()
2378 		 * make any change to the existing persistent reservation and  in core_scsi3_pro_reserve()
2467 	 * If the I_T nexus is a reservation holder, the persistent reservation  in __core_scsi3_complete_pro_release()
2470 	 * persistent reservation.  in __core_scsi3_complete_pro_release()
2527 	 * If there is no persistent reservation or in response to a persistent  in core_scsi3_emulate_pro_release()
2529 	 * persistent reservation holder (see 5.7.10), the device server shall  in core_scsi3_emulate_pro_release()
2532 	 *     a) Not release the persistent reservation, if any;  in core_scsi3_emulate_pro_release()
2540 		 * No persistent reservation, return GOOD status.  in core_scsi3_emulate_pro_release()
2549 		 * persistent reservation holder. return GOOD status.  in core_scsi3_emulate_pro_release()
2558 	 * Only the persistent reservation holder (see 5.7.10) is allowed to  in core_scsi3_emulate_pro_release()
2559 	 * release a persistent reservation.  in core_scsi3_emulate_pro_release()
2561 	 * An application client releases the persistent reservation by issuing  in core_scsi3_emulate_pro_release()
2562 	 * a PERSISTENT RESERVE OUT command with RELEASE service action through  in core_scsi3_emulate_pro_release()
2563 	 * an I_T nexus that is a persistent reservation holder with the  in core_scsi3_emulate_pro_release()
2580 	 * b) TYPE field and SCOPE field set to match the persistent  in core_scsi3_emulate_pro_release()
2600 	 * In response to a persistent reservation release request from the  in core_scsi3_emulate_pro_release()
2601 	 * persistent reservation holder the device server shall perform a  in core_scsi3_emulate_pro_release()
2603 	 * a) Release the persistent reservation;  in core_scsi3_emulate_pro_release()
2605 	 * c) If the released persistent reservation is a registrants only type  in core_scsi3_emulate_pro_release()
2606 	 * or all registrants type persistent reservation,  in core_scsi3_emulate_pro_release()
2609 	 *    tered I_T nexus other than I_T nexus on which the PERSISTENT  in core_scsi3_emulate_pro_release()
2612 	 * d) If the persistent reservation is of any other type, the device  in core_scsi3_emulate_pro_release()
2680 	 * Any application client may release the persistent reservation and  in core_scsi3_emulate_pro_clear()
2682 	 * PERSISTENT RESERVE OUT command with CLEAR service action through a  in core_scsi3_emulate_pro_clear()
2697 	 * a) Release the persistent reservation, if any;  in core_scsi3_emulate_pro_clear()
2722 		 *    than the I_T nexus on which the PERSISTENT RESERVE OUT  in core_scsi3_emulate_pro_clear()
2861 	 * persistent reservation holder or there is no persistent reservation  in core_scsi3_pro_preempt()
2862 	 * holder (i.e., there is no persistent reservation), then the device  in core_scsi3_pro_preempt()
2889 			 *    nexus on which the PERSISTENT RESERVE OUT command  in core_scsi3_pro_preempt()
2912 				 * release of active persistent reservation.  in core_scsi3_pro_preempt()
2940 		 * If a PERSISTENT RESERVE OUT with a PREEMPT service action or  in core_scsi3_pro_preempt()
2969 		 * whether the preempted I_T nexuses hold the persistent  in core_scsi3_pro_preempt()
2971 		 * set to zero and an all registrants persistent reservation is  in core_scsi3_pro_preempt()
2991 	 * existing persistent reservation, first, we check if  in core_scsi3_pro_preempt()
2994 	 * persistent reservations and registration handling  in core_scsi3_pro_preempt()
2996 	 * If an all registrants persistent reservation is not  in core_scsi3_pro_preempt()
2997 	 * present, it is not an error for the persistent  in core_scsi3_pro_preempt()
2999 	 * PERSISTENT RESERVE OUT with a PREEMPT service action  in core_scsi3_pro_preempt()
3002 	 * persistent reservation holder's reservation key that  in core_scsi3_pro_preempt()
3003 	 * is received from the persistent reservation holder).  in core_scsi3_pro_preempt()
3005 	 * new persistent reservation and maintain the  in core_scsi3_pro_preempt()
3012 	 * persistent reservation holder (see 5.7.10), the device  in core_scsi3_pro_preempt()
3016 	 * a) Release the persistent reservation for the holder  in core_scsi3_pro_preempt()
3026 	 *    I_T nexus that is being used for the PERSISTENT RESERVE  in core_scsi3_pro_preempt()
3027 	 *    OUT command. If an all registrants persistent reservation  in core_scsi3_pro_preempt()
3031 	 *    the PERSISTENT RESERVE OUT command;  in core_scsi3_pro_preempt()
3052 		 *    persistent reservation and/or registration, with the  in core_scsi3_pro_preempt()
3060 	 * c) Establish a persistent reservation for the preempting  in core_scsi3_pro_preempt()
3071 	 *    nexus on which the PERSISTENT RESERVE OUT command was  in core_scsi3_pro_preempt()
3103 	 * new persistent reservation holder, the calling Initiator Port.  in core_scsi3_pro_preempt()
3296 	 * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service  in core_scsi3_emulate_pro_register_and_move()
3382 	 * A persistent reservation needs to already existing in order to  in core_scsi3_emulate_pro_register_and_move()
3410 	 * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service  in core_scsi3_emulate_pro_register_and_move()
3411 	 * action is received and the established persistent reservation is a  in core_scsi3_emulate_pro_register_and_move()
3473 	 * f) Release the persistent reservation for the persistent reservation  in core_scsi3_emulate_pro_register_and_move()
3479 	 * g) Move the persistent reservation to the specified I_T nexus using  in core_scsi3_emulate_pro_register_and_move()
3480 	 *    the same scope and type as the persistent reservation released in  in core_scsi3_emulate_pro_register_and_move()
3515 	 * nexus on which PERSISTENT RESERVE OUT command was received.  in core_scsi3_emulate_pro_register_and_move()
3591 	 * still reserved by any initiator, all PERSISTENT RESERVE IN and all  in target_scsi3_emulate_pr_out()
3592 	 * PERSISTENT RESERVE OUT commands shall conflict regardless of  in target_scsi3_emulate_pr_out()
3825 		 * A persistent reservation holder has its reservation key  in core_scsi3_pri_read_reservation()
3826 		 * returned in the parameter data from a PERSISTENT  in core_scsi3_pri_read_reservation()
3829 		 * a) For a persistent reservation of the type Write Exclusive  in core_scsi3_pri_read_reservation()
3832 		 * b) For all other persistent reservation types, the  in core_scsi3_pri_read_reservation()
3835 		 *    persistent reservation.  in core_scsi3_pri_read_reservation()
3889 	 * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so  in core_scsi3_pri_report_capabilities()
3903 	 * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167  in core_scsi3_pri_report_capabilities()
4123 	 * still reserved by any initiator, all PERSISTENT RESERVE IN and all  in target_scsi3_emulate_pr_in()
4124 	 * PERSISTENT RESERVE OUT commands shall conflict regardless of  in target_scsi3_emulate_pr_in()