diff options
| author | Yafang Shao <laoar.shao@gmail.com> | 2023-10-29 06:14:32 +0000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2023-11-09 13:25:47 -1000 |
| commit | aecd408b7e50742868b3305c24325a89024e2a30 (patch) | |
| tree | cef667773cd2ee6e9880ef19f62d0a02562dada6 /include/linux/cgroup.h | |
| parent | 0008454e8fd30ed0017a9a35b8dd708f168931b8 (diff) | |
cgroup: Add a new helper for cgroup1 hierarchy
A new helper is added for cgroup1 hierarchy:
- task_get_cgroup1
Acquires the associated cgroup of a task within a specific cgroup1
hierarchy. The cgroup1 hierarchy is identified by its hierarchy ID.
This helper function is added to facilitate the tracing of tasks within
a particular container or cgroup dir in BPF programs. It's important to
note that this helper is designed specifically for cgroup1 only.
tj: Use irsqsave/restore as suggested by Hou Tao <houtao@huaweicloud.com>.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Cc: Hou Tao <houtao@huaweicloud.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 0ef0af66080e..34aaf0e87def 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -69,6 +69,7 @@ struct css_task_iter { extern struct file_system_type cgroup_fs_type; extern struct cgroup_root cgrp_dfl_root; extern struct css_set init_css_set; +extern spinlock_t css_set_lock; #define SUBSYS(_x) extern struct cgroup_subsys _x ## _cgrp_subsys; #include <linux/cgroup_subsys.h> @@ -386,7 +387,6 @@ static inline void cgroup_unlock(void) * as locks used during the cgroup_subsys::attach() methods. */ #ifdef CONFIG_PROVE_RCU -extern spinlock_t css_set_lock; #define task_css_set_check(task, __c) \ rcu_dereference_check((task)->cgroups, \ rcu_read_lock_sched_held() || \ @@ -853,4 +853,6 @@ static inline void cgroup_bpf_put(struct cgroup *cgrp) {} #endif /* CONFIG_CGROUP_BPF */ +struct cgroup *task_get_cgroup1(struct task_struct *tsk, int hierarchy_id); + #endif /* _LINUX_CGROUP_H */ |