From e15864f8ea05b24071b07300459ae7e511d0b938 Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Tue, 14 Jul 2020 23:18:23 +0200 Subject: block: add max_open_zones to blk-sysfs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a new max_open_zones definition in the sysfs documentation. This definition will be common for all devices utilizing the zoned block device support in the kernel. Export max open zones according to this new definition for NVMe Zoned Namespace devices, ZAC ATA devices (which are treated as SCSI devices by the kernel), and ZBC SCSI devices. Add the new max_open_zones member to struct request_queue, rather than as a queue limit, since this property cannot be split across stacking drivers. Signed-off-by: Niklas Cassel Reviewed-by: Javier González Reviewed-by: Damien Le Moal Reviewed-by: Johannes Thumshirn Reviewed-by: Martin K. Petersen Signed-off-by: Jens Axboe --- Documentation/block/queue-sysfs.rst | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Documentation/block') diff --git a/Documentation/block/queue-sysfs.rst b/Documentation/block/queue-sysfs.rst index 6a8513af9201..f01cf8530ae4 100644 --- a/Documentation/block/queue-sysfs.rst +++ b/Documentation/block/queue-sysfs.rst @@ -117,6 +117,13 @@ Maximum number of elements in a DMA scatter/gather list with integrity data that will be submitted by the block layer core to the associated block driver. +max_open_zones (RO) +------------------- +For zoned block devices (zoned attribute indicating "host-managed" or +"host-aware"), the sum of zones belonging to any of the zone states: +EXPLICIT OPEN or IMPLICIT OPEN, is limited by this value. +If this value is 0, there is no limit. + max_sectors_kb (RW) ------------------- This is the maximum number of kilobytes that the block layer will allow -- cgit v1.2.3