178 	 * Find out how many devices we have in the system.  in devstat_getnumdevs()
184 				 "%s: error getting number of devices\n"  in devstat_getnumdevs()
324  * Get the current list of devices and statistics, and the current
359 			 * Get the number of devices.  If it's negative, it's an  in devstat_getdevs()
368 			 * generation number, as well as all the devices.    in devstat_getdevs()
385 		 * Request all of the devices.  We only really allow for one  in devstat_getdevs()
389 		 * If devices are being added to the system that quickly, maybe  in devstat_getdevs()
390 		 * the user can just wait until all devices are added.  in devstat_getdevs()
402 			 * more devices now, so we need to allocate more   in devstat_getdevs()
458 	 * devices is not the same as the number of devices recorded in the  in devstat_getdevs()
463 	 * devices and reallocate the device array.  If the second sysctl  in devstat_getdevs()
483 	dinfo->devices = (struct devstat *)(dinfo->mem_ptr + sizeof(long));  in devstat_getdevs()
491  * Devices are selected/deselected based upon the following criteria:
492  * - devices specified by the user on the command line
493  * - devices matching any device type expressions given on the command line
494  * - devices with the highest I/O, if 'top' mode is enabled
495  * - the first n unselected devices in the device list, if maxshowdevs
496  *   devices haven't already been selected and if the user has not
497  *   specified any devices on the command line and if we're in "add" mode.
501  * - current number of devices selected (num_selected)
502  * - total number of devices in the selection list (num_selections)
506  * - current list of devices and statistics (devices)
507  * - number of devices in the current device list (numdevs)
509  *   - This is optional.  If the number of devices is 0, this will be ignored.
515  * - list of devices specified on the command line by the user (dev_selections)
516  * - number of devices selected on the command line by the user
519  *      - add mode.  (DS_SELECT_ADD) Any devices matching devices explicitly
520  *        selected by the user or devices matching a pattern given by the
521  *        user will be selected in addition to devices that are already
522  *        selected.  Additional devices will be selected, up to maxshowdevs
523  *        number of devices. 
524  *      - only mode. (DS_SELECT_ONLY)  Only devices matching devices
525  *        explicitly given by the user or devices matching a pattern
526  *        given by the user will be selected.  No other devices will be
529  *        only.  Basically, this will not de-select any devices that are
531  *        gratuitously select up to maxshowdevs devices as add mode would.
532  *      - remove mode.  (DS_SELECT_REMOVE)  Any devices matching devices
533  *        explicitly selected by the user or devices matching a pattern
535  * - maximum number of devices we can select (maxshowdevs)
540  * - the number of devices selected and the total number of items in the
546  *  0  -- selected devices are unchanged
547  *  1  -- selected devices changed
552 		   long current_generation, struct devstat *devices,  in devstat_selectdevs()  argument
565 	if ((dev_select == NULL) || (devices == NULL) || (numdevs < 0))  in devstat_selectdevs()
570 	 * entries as there are devices.   in devstat_selectdevs()
573 	 * In this case, we haven't selected devices before.  in devstat_selectdevs()
582 	 * In this case, we have selected devices before, but the device  in devstat_selectdevs()
583 	 * list has changed since we last selected devices, so we need to  in devstat_selectdevs()
592 	 * In this case, we've selected devices before, and the selection  in devstat_selectdevs()
617 	 * In all cases, we want to back up the number of selected devices.  in devstat_selectdevs()
619 	 * devices have changed.  in devstat_selectdevs()
625 	 * the list of devices has changed, or if we're in performance   in devstat_selectdevs()
656 				devices[i].device_number;  in devstat_selectdevs()
658 				devices[i].device_name,  in devstat_selectdevs()
661 			(*dev_select)[i].unit_number = devices[i].unit_number;  in devstat_selectdevs()
676 	 * Look through any devices the user specified on the command line  in devstat_selectdevs()
677 	 * and see if they match known devices.  If so, select them.  in devstat_selectdevs()
698 				 * manually specified devices are the first  in devstat_selectdevs()
720 					 * how many devices we've removed.  in devstat_selectdevs()
731 	 * Go through the user's device type expressions and select devices  in devstat_selectdevs()
732 	 * accordingly.  We only do this if the number of devices already  in devstat_selectdevs()
760 			  && ((devices[j].device_type & DEVSTAT_TYPE_MASK) ==  in devstat_selectdevs()
765 			    && ((devices[j].device_type &  in devstat_selectdevs()
769 			  && ((devices[j].device_type & DEVSTAT_TYPE_IF_MASK) ==  in devstat_selectdevs()
774 			    && ((devices[j].device_type &   in devstat_selectdevs()
778 			  && ((devices[j].device_type & DEVSTAT_TYPE_PASS) != 0)  in devstat_selectdevs()
783 				 * to the problem that the devices in the  in devstat_selectdevs()
785 				 * order as the devices in the selection  in devstat_selectdevs()
804 						devices[j].device_name,  in devstat_selectdevs()
805 						devices[j].unit_number);  in devstat_selectdevs()
817 				 * devices have already been selected, and  in devstat_selectdevs()
819 				 * matched devices.  If we're in remove  in devstat_selectdevs()
843 	 * Here we implement "top" mode.  Devices are sorted in the  in devstat_selectdevs()
853 	 * any devices or patterns.  In fact, though, it won't make any  in devstat_selectdevs()
856 	 * specified anything) the first time through no devices will be  in devstat_selectdevs()
859 	 * all devices will be selected, so again selection won't matter.  in devstat_selectdevs()
874 			 * the devices that were selected first.  in devstat_selectdevs()
896 	 * selected maxshowdevs number of devices, go through the array and  in devstat_selectdevs()
897 	 * select any unselected devices.  If we're in "only" mode, we  in devstat_selectdevs()
900 	 * idea to go through and select any more devices, since we might  in devstat_selectdevs()
915 	 * Look at the number of devices that have been selected.  If it  in devstat_selectdevs()
918 	 * selection list to see if the selected devices have changed.  in devstat_selectdevs()
1003  * sort key is whether or not one or the other of the devices in question
1006  * device.  If neither device is selected, we judge the devices based upon
1654 	 * Now push out all the devices.  in get_devstat_kvm()