again, copy/paste from bpf_timer_start().
Signed-off-by: Benjamin Tissoires <bentiss@xxxxxxxxxx>
---
changes in v2:
- dropped spinlock and use READ_ONCE() instead
---
kernel/bpf/helpers.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 85d3f483f27f..07550a657d7f 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -2711,6 +2711,23 @@ __bpf_kfunc int bpf_wq_init(struct bpf_wq *wq, void *p__map, unsigned int flags)
return __bpf_async_init(async, map, flags, BPF_ASYNC_TYPE_WQ);
}
+__bpf_kfunc int bpf_wq_start(struct bpf_wq *wq, unsigned int flags)
+{
+ struct bpf_async_kern *async = (struct bpf_async_kern *)wq;
+ struct bpf_work *w;
+
+ if (in_nmi())
+ return -EOPNOTSUPP;
+ if (flags)
+ return -EINVAL;
+ w = READ_ONCE(async->work);
+ if (!w || !READ_ONCE(w->cb.prog))
+ return -EINVAL;
+
+ schedule_work(&w->work);
+ return 0;
+}
+
__bpf_kfunc int bpf_wq_set_callback_impl(struct bpf_wq *wq,
int (callback_fn)(void *map, int *key, struct bpf_wq *wq),
unsigned int flags,
@@ -2804,6 +2821,7 @@ BTF_ID_FLAGS(func, bpf_dynptr_clone)
BTF_ID_FLAGS(func, bpf_modify_return_test_tp)
BTF_ID_FLAGS(func, bpf_wq_init)
BTF_ID_FLAGS(func, bpf_wq_set_callback_impl)
+BTF_ID_FLAGS(func, bpf_wq_start)
BTF_KFUNCS_END(common_btf_ids)
static const struct btf_kfunc_id_set common_kfunc_set = {
--
2.44.0
