diff options
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index b905208942bf..303655d9deaf 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -82,12 +82,38 @@ enum cgroup_lifetime_events { CGROUP_LIFETIME_OFFLINE, }; +/* + * Events on cgroup_task_notifier, data is struct cgroup_task_migrate_ctx. + * MIGRATING fires per task before the migration commits and an error return + * from the chain fails the migration, in which case tasks that were already + * notified receive MIGRATE_CANCELED. MIGRATED fires per task after the + * migration is committed and can't fail. Only migrations that change a task's + * dfl cgroup are reported. + */ +enum cgroup_task_events { + CGROUP_TASK_MIGRATING, + CGROUP_TASK_MIGRATED, + CGROUP_TASK_MIGRATE_CANCELED, +}; + +/* + * @src_dcgrp and @dst_dcgrp are @task's dfl cgroups before and after the + * migration. @src_dcgrp is NULL for CGROUP_TASK_MIGRATED as per-task sources + * are not tracked past the commit point. + */ +struct cgroup_task_migrate_ctx { + struct task_struct *task; + struct cgroup *src_dcgrp; + struct cgroup *dst_dcgrp; +}; + extern struct file_system_type cgroup_fs_type; extern struct cgroup_root cgrp_dfl_root; extern struct css_set init_css_set; extern struct mutex cgroup_mutex; extern spinlock_t css_set_lock; extern struct blocking_notifier_head cgroup_lifetime_notifier; +extern struct blocking_notifier_head cgroup_task_notifier; #define SUBSYS(_x) extern struct cgroup_subsys _x ## _cgrp_subsys; #include <linux/cgroup_subsys.h> |