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bpf: add bpf_wq_start

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again, copy/paste from bpf_timer_start().

Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Link: https://lore.kernel.org/r/20240420-bpf_wq-v2-15-6c986a5a741f@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Benjamin Tissoires 2024-04-20 11:09:15 +02:00 committed by Alexei Starovoitov
parent 01b7b1c5f3
commit 8e83da9732
1 changed files with 18 additions and 0 deletions
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18
kernel/bpf/helpers.c
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@ -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 = {