cgroup_control

Name:subsystems visibly enabled on a cgroup

Proto:static u16 cgroup_control(struct cgroup *cgrp)

Type:u16

Parameter:

Type	Parameter	Name
struct cgroup *	cgrp

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parent = cgroup_parent(cgrp)

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root_ss_mask = The bitmask of subsystems attached to this hierarchy

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If parent Then

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ss_mask = * The bitmask of subsystems enabled on the child cgroups. * ->subtree_control is the one configured through * "cgroup.subtree_control" while ->child_ss_mask is the effective * one which may have more subsystems enabled. Controller knobs * are made availabl

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If cgroup_is_threaded(cgrp) Then ss_mask &= some controllers can be threaded on the default hierarchy

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Return ss_mask

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If group_on_dfl - test whether a cgroup is on the default hierarchy*@cgrp: the cgroup of interest* The default hierarchy is the v2 interface of cgroup and this function* can be used to test whether a cgroup is on the default hierarchy for* cases where a Then root_ss_mask &= ~(some controllers are not supported in the default hierarchy | some controllers are implicitly enabled on the default hierarchy )

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Return root_ss_mask

**Caller**
Name	Describe
cgroup_controllers_show	show controllers which are enabled from the parent
cgroup_propagate_control	group_propagate_control - refresh control masks of a subtree@cgrp: root of the target subtree For @cgrp and its subtree, ensure ->subtree_ss_mask matches* ->subtree_control and propagate controller availability through the
css_visible
cgroup_subtree_control_write	hange the enabled child controllers for a cgroup in the default hierarchy
cgroup_create	The returned cgroup is fully initialized including its control mask, but* it isn't associated with its kernfs_node and doesn't have the control* mask applied.

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