On 8/28/20 4:54 AM, Niklas Cassel wrote: > Add support for user space to set a max open zone and a max active zone > limit via configfs. By default, the default values are 0 == no limit. > > Call the block layer API functions used for exposing the configured > limits to sysfs. > > Add accounting in null_blk_zoned so that these new limits are respected. > Performing an operation that would exceed these limits results in a > standard I/O error. > > A max open zone limit exists in the ZBC standard. > While null_blk_zoned is used to test the Zoned Block Device model in > Linux, when it comes to differences between ZBC and ZNS, null_blk_zoned > mostly follows ZBC. > > Therefore, implement the manage open zone resources function from ZBC, > but additionally add support for max active zones. > This enables user space not only to test against a device with an open > zone limit, but also to test against a device with an active zone limit.
Applied, thanks. -- Jens Axboe
