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authorTejun Heo <tj@kernel.org>2013-04-14 20:50:08 -0700
committerMaciej Wereski <m.wereski@partner.samsung.com>2014-12-22 09:16:48 +0100
commitc041e2cd281c85e7e66fc2ab0e6e2c8b37d97977 (patch)
treec2c11a197682b0cea6fdbd6897b792ca2afb63a5 /include
parenteed4bbdc4a0ae13b806e4f8d28acfbab9b7d008b (diff)
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cgroup: implement task_cgroup_path_from_hierarchy()
kdbus folks want a sane way to determine the cgroup path that a given task belongs to on a given hierarchy, which is a reasonble thing to expect from cgroup core. Implement task_cgroup_path_from_hierarchy(). v2: Dropped unnecessary NULL check on the return value of task_cgroup_from_root() as suggested by Li Zefan. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <greg@kroah.com> Acked-by: Li Zefan <lizefan@huawei.com> Cc: Kay Sievers <kay@vrfy.org> Cc: Lennart Poettering <lennart@poettering.net> Cc: Daniel Mack <daniel@zonque.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/cgroup.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 8852d370c72..5982ebf66ae 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -542,6 +542,8 @@ int cgroup_is_removed(const struct cgroup *cgrp);
bool cgroup_is_descendant(struct cgroup *cgrp, struct cgroup *ancestor);
int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen);
+int task_cgroup_path_from_hierarchy(struct task_struct *task, int hierarchy_id,
+ char *buf, size_t buflen);
int cgroup_task_count(const struct cgroup *cgrp);