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Diffstat (limited to 'include/linux/cgroup-defs.h')
-rw-r--r--include/linux/cgroup-defs.h43
1 files changed, 29 insertions, 14 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 7fc7cb787..5b17de62c 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -45,6 +45,7 @@ enum {
CSS_NO_REF = (1 << 0), /* no reference counting for this css */
CSS_ONLINE = (1 << 1), /* between ->css_online() and ->css_offline() */
CSS_RELEASED = (1 << 2), /* refcnt reached zero, released */
+ CSS_VISIBLE = (1 << 3), /* css is visible to userland */
};
/* bits in struct cgroup flags field */
@@ -190,12 +191,13 @@ struct css_set {
/*
* If this cset is acting as the source of migration the following
- * two fields are set. mg_src_cgrp is the source cgroup of the
- * on-going migration and mg_dst_cset is the destination cset the
- * target tasks on this cset should be migrated to. Protected by
- * cgroup_mutex.
+ * two fields are set. mg_src_cgrp and mg_dst_cgrp are
+ * respectively the source and destination cgroups of the on-going
+ * migration. mg_dst_cset is the destination cset the target tasks
+ * on this cset should be migrated to. Protected by cgroup_mutex.
*/
struct cgroup *mg_src_cgrp;
+ struct cgroup *mg_dst_cgrp;
struct css_set *mg_dst_cset;
/*
@@ -256,13 +258,14 @@ struct cgroup {
/*
* The bitmask of subsystems enabled on the child cgroups.
* ->subtree_control is the one configured through
- * "cgroup.subtree_control" while ->child_subsys_mask is the
- * effective one which may have more subsystems enabled.
- * Controller knobs are made available iff it's enabled in
- * ->subtree_control.
+ * "cgroup.subtree_control" while ->child_ss_mask is the effective
+ * one which may have more subsystems enabled. Controller knobs
+ * are made available iff it's enabled in ->subtree_control.
*/
- unsigned int subtree_control;
- unsigned int child_subsys_mask;
+ u16 subtree_control;
+ u16 subtree_ss_mask;
+ u16 old_subtree_control;
+ u16 old_subtree_ss_mask;
/* Private pointers for each registered subsystem */
struct cgroup_subsys_state __rcu *subsys[CGROUP_SUBSYS_COUNT];
@@ -437,7 +440,6 @@ struct cgroup_subsys {
void (*css_released)(struct cgroup_subsys_state *css);
void (*css_free)(struct cgroup_subsys_state *css);
void (*css_reset)(struct cgroup_subsys_state *css);
- void (*css_e_css_changed)(struct cgroup_subsys_state *css);
int (*can_attach)(struct cgroup_taskset *tset);
void (*cancel_attach)(struct cgroup_taskset *tset);
@@ -450,7 +452,20 @@ struct cgroup_subsys {
void (*free)(struct task_struct *task);
void (*bind)(struct cgroup_subsys_state *root_css);
- int early_init;
+ bool early_init:1;
+
+ /*
+ * If %true, the controller, on the default hierarchy, doesn't show
+ * up in "cgroup.controllers" or "cgroup.subtree_control", is
+ * implicitly enabled on all cgroups on the default hierarchy, and
+ * bypasses the "no internal process" constraint. This is for
+ * utility type controllers which is transparent to userland.
+ *
+ * An implicit controller can be stolen from the default hierarchy
+ * anytime and thus must be okay with offline csses from previous
+ * hierarchies coexisting with csses for the current one.
+ */
+ bool implicit_on_dfl:1;
/*
* If %false, this subsystem is properly hierarchical -
@@ -464,8 +479,8 @@ struct cgroup_subsys {
* cases. Eventually, all subsystems will be made properly
* hierarchical and this will go away.
*/
- bool broken_hierarchy;
- bool warned_broken_hierarchy;
+ bool broken_hierarchy:1;
+ bool warned_broken_hierarchy:1;
/* the following two fields are initialized automtically during boot */
int id;