diff options
| author | Tejun Heo <tj@kernel.org> | 2024-06-18 10:09:16 -1000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2024-06-18 10:09:16 -1000 |
| commit | 304b3f2bc07ba7c74a1ebc7917a8f0549e6b8d54 (patch) | |
| tree | 582484f486f8bfb72c9d02c59f9fe5eb3e63b3bd /include/linux/sched/task.h | |
| parent | df268382adc1f7aa3ad92f7de71b70395f24e4e7 (diff) | |
sched: Allow sched_cgroup_fork() to fail and introduce sched_cancel_fork()
A new BPF extensible sched_class will need more control over the forking
process. It wants to be able to fail from sched_cgroup_fork() after the new
task's sched_task_group is initialized so that the loaded BPF program can
prepare the task with its cgroup association is established and reject fork
if e.g. allocation fails.
Allow sched_cgroup_fork() to fail by making it return int instead of void
and adding sched_cancel_fork() to undo sched_fork() in the error path.
sched_cgroup_fork() doesn't fail yet and this patch shouldn't cause any
behavior changes.
v2: Patch description updated to detail the expected use.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: David Vernet <dvernet@meta.com>
Acked-by: Josh Don <joshdon@google.com>
Acked-by: Hao Luo <haoluo@google.com>
Acked-by: Barret Rhoden <brho@google.com>
Diffstat (limited to 'include/linux/sched/task.h')
| -rw-r--r-- | include/linux/sched/task.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index d362aacf9f89..4df2f9055587 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -63,7 +63,8 @@ extern asmlinkage void schedule_tail(struct task_struct *prev); extern void init_idle(struct task_struct *idle, int cpu); extern int sched_fork(unsigned long clone_flags, struct task_struct *p); -extern void sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs); +extern int sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs); +extern void sched_cancel_fork(struct task_struct *p); extern void sched_post_fork(struct task_struct *p); extern void sched_dead(struct task_struct *p); |