Add a new kernel API to attach a task to current task's cgroup in all the active hierarchies.
Signed-off-by: Sridhar Samudrala <[email protected]> diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -570,6 +570,7 @@ struct task_struct *cgroup_iter_next(struct cgroup *cgrp, void cgroup_iter_end(struct cgroup *cgrp, struct cgroup_iter *it); int cgroup_scan_tasks(struct cgroup_scanner *scan); int cgroup_attach_task(struct cgroup *, struct task_struct *); +int cgroup_attach_task_current_cg(struct task_struct *); /* * CSS ID is ID for cgroup_subsys_state structs under subsys. This only works diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 6d870f2..6cfeb06 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1788,6 +1788,29 @@ out: return retval; } +/** + * cgroup_attach_task_current_cg - attach task 'tsk' to current task's cgroup + * @tsk: the task to be attached + */ +int cgroup_attach_task_current_cg(struct task_struct *tsk) +{ + struct cgroupfs_root *root; + struct cgroup *cur_cg; + int retval = 0; + + cgroup_lock(); + for_each_active_root(root) { + cur_cg = task_cgroup_from_root(current, root); + retval = cgroup_attach_task(cur_cg, tsk); + if (retval) + break; + } + cgroup_unlock(); + + return retval; +} +EXPORT_SYMBOL_GPL(cgroup_attach_task_current_cg); + /* * Attach task with pid 'pid' to cgroup 'cgrp'. Call with cgroup_mutex * held. May take task_lock of task -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
