Commit 74c22990 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Christoph Hellwig
Browse files

nvme: add 'kato' sysfs attribute 



Add a 'kato' controller sysfs attribute to display the current
keep-alive timeout value (if any). This allows userspace to identify
persistent discovery controllers, as these will have a non-zero
KATO value.

Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent a70b81bd

drivers/nvme/host/core.c

+2 −0
Original line number Diff line number Diff line
@@ -3172,6 +3172,7 @@ nvme_show_int_function(cntlid); 
nvme_show_int_function(numa_node);

nvme_show_int_function(queue_count);

nvme_show_int_function(sqsize);

nvme_show_int_function(kato);



static ssize_t nvme_sysfs_delete(struct device *dev,

				struct device_attribute *attr, const char *buf,
@@ -3369,6 +3370,7 @@ static struct attribute *nvme_dev_attrs[] = { 
	&dev_attr_ctrl_loss_tmo.attr,

	&dev_attr_reconnect_delay.attr,

	&dev_attr_fast_io_fail_tmo.attr,

	&dev_attr_kato.attr,

	NULL

};