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authorTejun Heo <tj@kernel.org>2015-12-08 01:24:10 +0300
committerTejun Heo <tj@kernel.org>2015-12-08 01:24:10 +0300
commit177493987c1a15145922a65240f2f8ab6c63770a (patch)
tree9b53320193b62cd405aeb20897ada2796bc32aa3 /include/linux/cgroup.h
parente11362bb25d97ea1cbe9e3b1e5f3d32aa4e75e13 (diff)
parent16af439645455fbf36984ca5e72f31073ee19ab7 (diff)
downloadlinux-177493987c1a15145922a65240f2f8ab6c63770a.tar.xz
Merge branch 'for-4.5-ancestor-test' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup into for-4.5
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/cgroup.h')
-rw-r--r--include/linux/cgroup.h25
1 files changed, 24 insertions, 1 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 2b3e231448ca..9d70b4848260 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -81,7 +81,8 @@ struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgroup,
struct cgroup_subsys_state *css_tryget_online_from_dir(struct dentry *dentry,
struct cgroup_subsys *ss);
-bool cgroup_is_descendant(struct cgroup *cgrp, struct cgroup *ancestor);
+struct cgroup *cgroup_get_from_path(const char *path);
+
int cgroup_attach_task_all(struct task_struct *from, struct task_struct *);
int cgroup_transfer_tasks(struct cgroup *to, struct cgroup *from);
@@ -361,6 +362,11 @@ static inline void css_put_many(struct cgroup_subsys_state *css, unsigned int n)
percpu_ref_put_many(&css->refcnt, n);
}
+static inline void cgroup_put(struct cgroup *cgrp)
+{
+ css_put(&cgrp->self);
+}
+
/**
* task_css_set_check - obtain a task's css_set with extra access conditions
* @task: the task to obtain css_set for
@@ -468,6 +474,23 @@ static inline struct cgroup *task_cgroup(struct task_struct *task,
return task_css(task, subsys_id)->cgroup;
}
+/**
+ * cgroup_is_descendant - test ancestry
+ * @cgrp: the cgroup to be tested
+ * @ancestor: possible ancestor of @cgrp
+ *
+ * Test whether @cgrp is a descendant of @ancestor. It also returns %true
+ * if @cgrp == @ancestor. This function is safe to call as long as @cgrp
+ * and @ancestor are accessible.
+ */
+static inline bool cgroup_is_descendant(struct cgroup *cgrp,
+ struct cgroup *ancestor)
+{
+ if (cgrp->root != ancestor->root || cgrp->level < ancestor->level)
+ return false;
+ return cgrp->ancestor_ids[ancestor->level] == ancestor->id;
+}
+
/* no synchronization, the result can only be used as a hint */
static inline bool cgroup_is_populated(struct cgroup *cgrp)
{