mirror of
https://github.com/torvalds/linux
synced 2024-10-03 09:48:02 +00:00
ublk: Make ublks_max configurable
We are converting tcmu applications to ublk, but have systems with up to 1k devices. This patch allows us to configure the ublks_max from userspace with the ublks_max modparam. Signed-off-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20231012150600.6198-3-michael.christie@oracle.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
56974c07f2
commit
6eba24aeb5
|
@ -2940,7 +2940,22 @@ static void __exit ublk_exit(void)
|
|||
module_init(ublk_init);
|
||||
module_exit(ublk_exit);
|
||||
|
||||
module_param(ublks_max, int, 0444);
|
||||
static int ublk_set_max_ublks(const char *buf, const struct kernel_param *kp)
|
||||
{
|
||||
return param_set_uint_minmax(buf, kp, 0, UBLK_MAX_UBLKS);
|
||||
}
|
||||
|
||||
static int ublk_get_max_ublks(char *buf, const struct kernel_param *kp)
|
||||
{
|
||||
return sysfs_emit(buf, "%u\n", ublks_max);
|
||||
}
|
||||
|
||||
static const struct kernel_param_ops ublk_max_ublks_ops = {
|
||||
.set = ublk_set_max_ublks,
|
||||
.get = ublk_get_max_ublks,
|
||||
};
|
||||
|
||||
module_param_cb(ublks_max, &ublk_max_ublks_ops, &ublks_max, 0644);
|
||||
MODULE_PARM_DESC(ublks_max, "max number of ublk devices allowed to add(default: 64)");
|
||||
|
||||
MODULE_AUTHOR("Ming Lei <ming.lei@redhat.com>");
|
||||
|
|
Loading…
Reference in a new issue